Automatic merge of rsync://rsync.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6.git

arch/ia64/Kconfig

···
 	  If you are compiling a kernel that will run under SGI's IA-64
 	  simulator (Medusa) then say Y, otherwise say N.
 
+config IA64_SGI_SN_XP
+	tristate "Support communication between SGI SSIs"
+	depends on MSPEC
+	help
+	  An SGI machine can be divided into multiple Single System
+	  Images which act independently of each other and have
+	  hardware based memory protection from the others.  Enabling
+	  this feature will allow for direct communication between SSIs
+	  based on a network adapter and DMA messaging.
+
 config FORCE_MAX_ZONEORDER
 	int
 	default "18"
···
 	  Say Y here to experiment with turning CPUs off and on.  CPUs
 	  can be controlled through /sys/devices/system/cpu/cpu#.
 	  Say N if you want to disable CPU hotplug.
+
+config SCHED_SMT
+	bool "SMT scheduler support"
+	depends on SMP
+	default off
+	help
+	  Improves the CPU scheduler's decision making when dealing with
+	  Intel IA64 chips with MultiThreading at a cost of slightly increased
+	  overhead in some places. If unsure say N here.
 
 config PREEMPT
 	bool "Preemptible Kernel"

arch/ia64/configs/tiger_defconfig

···
 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.11-rc2
-# Sat Jan 22 11:17:02 2005
+# Linux kernel version: 2.6.12-rc3
+# Tue May  3 15:55:04 2005
 #
 
 #
···
 CONFIG_EXPERIMENTAL=y
 CONFIG_CLEAN_COMPILE=y
 CONFIG_LOCK_KERNEL=y
+CONFIG_INIT_ENV_ARG_LIMIT=32
 
 #
 # General setup
···
 # CONFIG_BSD_PROCESS_ACCT is not set
 CONFIG_SYSCTL=y
 # CONFIG_AUDIT is not set
-CONFIG_LOG_BUF_SHIFT=20
 CONFIG_HOTPLUG=y
 CONFIG_KOBJECT_UEVENT=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
+# CONFIG_CPUSETS is not set
 # CONFIG_EMBEDDED is not set
 CONFIG_KALLSYMS=y
 CONFIG_KALLSYMS_ALL=y
 # CONFIG_KALLSYMS_EXTRA_PASS is not set
+CONFIG_PRINTK=y
+CONFIG_BUG=y
+CONFIG_BASE_FULL=y
 CONFIG_FUTEX=y
 CONFIG_EPOLL=y
-# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
 CONFIG_SHMEM=y
 CONFIG_CC_ALIGN_FUNCTIONS=0
 CONFIG_CC_ALIGN_LABELS=0
 CONFIG_CC_ALIGN_LOOPS=0
 CONFIG_CC_ALIGN_JUMPS=0
 # CONFIG_TINY_SHMEM is not set
+CONFIG_BASE_SMALL=0
 
 #
 # Loadable module support
···
 CONFIG_SMP=y
 CONFIG_NR_CPUS=4
 CONFIG_HOTPLUG_CPU=y
+# CONFIG_SCHED_SMT is not set
 # CONFIG_PREEMPT is not set
 CONFIG_HAVE_DEC_LOCK=y
 CONFIG_IA32_SUPPORT=y
···
 # CONFIG_PCI_MSI is not set
 CONFIG_PCI_LEGACY_PROC=y
 CONFIG_PCI_NAMES=y
+# CONFIG_PCI_DEBUG is not set
 
 #
 # PCI Hotplug Support
···
 # PCCARD (PCMCIA/CardBus) support
 #
 # CONFIG_PCCARD is not set
-
-#
-# PC-card bridges
-#
 
 #
 # Device Drivers
···
 CONFIG_BLK_DEV_NBD=m
 # CONFIG_BLK_DEV_SX8 is not set
 # CONFIG_BLK_DEV_UB is not set
-CONFIG_BLK_DEV_RAM=m
+CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_COUNT=16
 CONFIG_BLK_DEV_RAM_SIZE=4096
+CONFIG_BLK_DEV_INITRD=y
 CONFIG_INITRAMFS_SOURCE=""
 # CONFIG_CDROM_PKTCDVD is not set
 
···
 # CONFIG_SCSI_BUSLOGIC is not set
 # CONFIG_SCSI_DMX3191D is not set
 # CONFIG_SCSI_EATA is not set
-# CONFIG_SCSI_EATA_PIO is not set
 # CONFIG_SCSI_FUTURE_DOMAIN is not set
 # CONFIG_SCSI_GDTH is not set
 # CONFIG_SCSI_IPS is not set
···
 CONFIG_SCSI_SYM53C8XX_MAX_TAGS=64
 # CONFIG_SCSI_SYM53C8XX_IOMAPPED is not set
 # CONFIG_SCSI_IPR is not set
-# CONFIG_SCSI_QLOGIC_ISP is not set
 CONFIG_SCSI_QLOGIC_FC=y
 # CONFIG_SCSI_QLOGIC_FC_FIRMWARE is not set
 CONFIG_SCSI_QLOGIC_1280=y
···
 CONFIG_SCSI_QLA2300=m
 CONFIG_SCSI_QLA2322=m
 # CONFIG_SCSI_QLA6312 is not set
+# CONFIG_SCSI_LPFC is not set
 # CONFIG_SCSI_DC395x is not set
 # CONFIG_SCSI_DC390T is not set
 # CONFIG_SCSI_DEBUG is not set
···
 CONFIG_DM_SNAPSHOT=m
 CONFIG_DM_MIRROR=m
 CONFIG_DM_ZERO=m
+# CONFIG_DM_MULTIPATH is not set
 
 #
 # Fusion MPT device support
···
 #
 CONFIG_PACKET=y
 # CONFIG_PACKET_MMAP is not set
-CONFIG_NETLINK_DEV=y
 CONFIG_UNIX=y
 # CONFIG_NET_KEY is not set
 CONFIG_INET=y
···
 # CONFIG_BONDING is not set
 # CONFIG_EQUALIZER is not set
 # CONFIG_TUN is not set
-# CONFIG_ETHERTAP is not set
 
 #
 # ARCnet devices
···
 # CONFIG_DGRS is not set
 CONFIG_EEPRO100=m
 CONFIG_E100=m
-# CONFIG_E100_NAPI is not set
 # CONFIG_FEALNX is not set
 # CONFIG_NATSEMI is not set
 # CONFIG_NE2K_PCI is not set
···
 # CONFIG_INPUT_EVBUG is not set
 
 #
-# Input I/O drivers
-#
-CONFIG_GAMEPORT=m
-CONFIG_SOUND_GAMEPORT=m
-# CONFIG_GAMEPORT_NS558 is not set
-# CONFIG_GAMEPORT_L4 is not set
-# CONFIG_GAMEPORT_EMU10K1 is not set
-# CONFIG_GAMEPORT_VORTEX is not set
-# CONFIG_GAMEPORT_FM801 is not set
-# CONFIG_GAMEPORT_CS461X is not set
-CONFIG_SERIO=y
-CONFIG_SERIO_I8042=y
-# CONFIG_SERIO_SERPORT is not set
-# CONFIG_SERIO_CT82C710 is not set
-# CONFIG_SERIO_PCIPS2 is not set
-CONFIG_SERIO_LIBPS2=y
-# CONFIG_SERIO_RAW is not set
-
-#
 # Input Device Drivers
 #
 CONFIG_INPUT_KEYBOARD=y
···
 # CONFIG_INPUT_MISC is not set
 
 #
+# Hardware I/O ports
+#
+CONFIG_SERIO=y
+CONFIG_SERIO_I8042=y
+# CONFIG_SERIO_SERPORT is not set
+# CONFIG_SERIO_PCIPS2 is not set
+CONFIG_SERIO_LIBPS2=y
+# CONFIG_SERIO_RAW is not set
+CONFIG_GAMEPORT=m
+# CONFIG_GAMEPORT_NS558 is not set
+# CONFIG_GAMEPORT_L4 is not set
+# CONFIG_GAMEPORT_EMU10K1 is not set
+# CONFIG_GAMEPORT_VORTEX is not set
+# CONFIG_GAMEPORT_FM801 is not set
+# CONFIG_GAMEPORT_CS461X is not set
+CONFIG_SOUND_GAMEPORT=m
+
+#
 # Character devices
 #
 CONFIG_VT=y
···
 # CONFIG_SYNCLINK is not set
 # CONFIG_SYNCLINKMP is not set
 # CONFIG_N_HDLC is not set
+# CONFIG_SPECIALIX is not set
+# CONFIG_SX is not set
 # CONFIG_STALDRV is not set
 
 #
···
 #
 CONFIG_SERIAL_CORE=y
 CONFIG_SERIAL_CORE_CONSOLE=y
+# CONFIG_SERIAL_JSM is not set
 CONFIG_UNIX98_PTYS=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
···
 # CONFIG_HPET_RTC_IRQ is not set
 CONFIG_HPET_MMAP=y
 CONFIG_MAX_RAW_DEVS=256
+# CONFIG_HANGCHECK_TIMER is not set
+
+#
+# TPM devices
+#
+# CONFIG_TCG_TPM is not set
 
 #
 # I2C support
···
 #
 CONFIG_VGA_CONSOLE=y
 CONFIG_DUMMY_CONSOLE=y
-# CONFIG_BACKLIGHT_LCD_SUPPORT is not set
 
 #
 # Sound
···
 #
 # USB support
 #
+CONFIG_USB_ARCH_HAS_HCD=y
+CONFIG_USB_ARCH_HAS_OHCI=y
 CONFIG_USB=y
 # CONFIG_USB_DEBUG is not set
 
···
 # CONFIG_USB_DYNAMIC_MINORS is not set
 # CONFIG_USB_SUSPEND is not set
 # CONFIG_USB_OTG is not set
-CONFIG_USB_ARCH_HAS_HCD=y
-CONFIG_USB_ARCH_HAS_OHCI=y
 
 #
 # USB Host Controller Drivers
···
 # CONFIG_USB_EHCI_SPLIT_ISO is not set
 # CONFIG_USB_EHCI_ROOT_HUB_TT is not set
 CONFIG_USB_OHCI_HCD=m
+# CONFIG_USB_OHCI_BIG_ENDIAN is not set
+CONFIG_USB_OHCI_LITTLE_ENDIAN=y
 CONFIG_USB_UHCI_HCD=y
 # CONFIG_USB_SL811_HCD is not set
 
···
 #
 CONFIG_USB_STORAGE=m
 # CONFIG_USB_STORAGE_DEBUG is not set
-# CONFIG_USB_STORAGE_RW_DETECT is not set
 # CONFIG_USB_STORAGE_DATAFAB is not set
 # CONFIG_USB_STORAGE_FREECOM is not set
 # CONFIG_USB_STORAGE_ISD200 is not set
 # CONFIG_USB_STORAGE_DPCM is not set
-# CONFIG_USB_STORAGE_HP8200e is not set
+# CONFIG_USB_STORAGE_USBAT is not set
 # CONFIG_USB_STORAGE_SDDR09 is not set
 # CONFIG_USB_STORAGE_SDDR55 is not set
 # CONFIG_USB_STORAGE_JUMPSHOT is not set
···
 # CONFIG_USB_PEGASUS is not set
 # CONFIG_USB_RTL8150 is not set
 # CONFIG_USB_USBNET is not set
+# CONFIG_USB_MON is not set
 
 #
 # USB port drivers
···
 # CONFIG_USB_PHIDGETKIT is not set
 # CONFIG_USB_PHIDGETSERVO is not set
 # CONFIG_USB_IDMOUSE is not set
+# CONFIG_USB_SISUSBVGA is not set
 # CONFIG_USB_TEST is not set
 
 #
···
 CONFIG_REISERFS_FS_SECURITY=y
 # CONFIG_JFS_FS is not set
 CONFIG_FS_POSIX_ACL=y
+
+#
+# XFS support
+#
 CONFIG_XFS_FS=y
+CONFIG_XFS_EXPORT=y
 # CONFIG_XFS_RT is not set
 # CONFIG_XFS_QUOTA is not set
 # CONFIG_XFS_SECURITY is not set
···
 CONFIG_NFSD_TCP=y
 CONFIG_LOCKD=m
 CONFIG_LOCKD_V4=y
-CONFIG_EXPORTFS=m
+CONFIG_EXPORTFS=y
 CONFIG_SUNRPC=m
 CONFIG_SUNRPC_GSS=m
 CONFIG_RPCSEC_GSS_KRB5=m
···
 #
 # Kernel hacking
 #
+# CONFIG_PRINTK_TIME is not set
 CONFIG_DEBUG_KERNEL=y
 CONFIG_MAGIC_SYSRQ=y
+CONFIG_LOG_BUF_SHIFT=20
 # CONFIG_SCHEDSTATS is not set
 # CONFIG_DEBUG_SLAB is not set
 # CONFIG_DEBUG_SPINLOCK is not set
···
 # CONFIG_CRYPTO_SHA256 is not set
 # CONFIG_CRYPTO_SHA512 is not set
 # CONFIG_CRYPTO_WP512 is not set
+# CONFIG_CRYPTO_TGR192 is not set
 CONFIG_CRYPTO_DES=m
 # CONFIG_CRYPTO_BLOWFISH is not set
 # CONFIG_CRYPTO_TWOFISH is not set

arch/ia64/hp/common/sba_iommu.c

···
 static void __init
 sba_map_ioc_to_node(struct ioc *ioc, acpi_handle handle)
 {
-	struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
-	union acpi_object *obj;
-	acpi_handle phandle;
 	unsigned int node;
+	int pxm;
 
 	ioc->node = MAX_NUMNODES;
 
-	/*
-	 * Check for a _PXM on this node first.  We don't typically see
-	 * one here, so we'll end up getting it from the parent.
-	 */
-	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_PXM", NULL, &buffer))) {
-		if (ACPI_FAILURE(acpi_get_parent(handle, &phandle)))
-			return;
+	pxm = acpi_get_pxm(handle);
 
-		/* Reset the acpi buffer */
-		buffer.length = ACPI_ALLOCATE_BUFFER;
-		buffer.pointer = NULL;
-
-		if (ACPI_FAILURE(acpi_evaluate_object(phandle, "_PXM", NULL,
-		                                      &buffer)))
-			return;
-	}
-
-	if (!buffer.length || !buffer.pointer)
+	if (pxm < 0)
 		return;
 
-	obj = buffer.pointer;
-
-	if (obj->type != ACPI_TYPE_INTEGER ||
-	    obj->integer.value >= MAX_PXM_DOMAINS) {
-		acpi_os_free(buffer.pointer);
-		return;
-	}
-
-	node = pxm_to_nid_map[obj->integer.value];
-	acpi_os_free(buffer.pointer);
+	node = pxm_to_nid_map[pxm];
 
 	if (node >= MAX_NUMNODES || !node_online(node))
 		return;

arch/ia64/kernel/acpi.c

···
 	union acpi_object *obj;
 	struct acpi_table_iosapic *iosapic;
 	unsigned int gsi_base;
-	int node;
+	int pxm, node;
 
 	/* Only care about objects w/ a method that returns the MADT */
 	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
···
 	gsi_base = iosapic->global_irq_base;
 
 	acpi_os_free(buffer.pointer);
-	buffer.length = ACPI_ALLOCATE_BUFFER;
-	buffer.pointer = NULL;
 
 	/*
-	 * OK, it's an IOSAPIC MADT entry, look for a _PXM method to tell
+	 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
 	 * us which node to associate this with.
 	 */
-	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_PXM", NULL, &buffer)))
+	pxm = acpi_get_pxm(handle);
+	if (pxm < 0)
 		return AE_OK;
 
-	if (!buffer.length || !buffer.pointer)
-		return AE_OK;
-
-	obj = buffer.pointer;
-
-	if (obj->type != ACPI_TYPE_INTEGER ||
-	    obj->integer.value >= MAX_PXM_DOMAINS) {
-		acpi_os_free(buffer.pointer);
-		return AE_OK;
-	}
-
-	node = pxm_to_nid_map[obj->integer.value];
-	acpi_os_free(buffer.pointer);
+	node = pxm_to_nid_map[pxm];
 
 	if (node >= MAX_NUMNODES || !node_online(node) ||
 	    cpus_empty(node_to_cpumask(node)))

arch/ia64/kernel/entry.S

···
 	st8.spill [r2]=r8	// store return value in slot for r8 and set unat bit
 	.mem.offset 8,0
 	st8.spill [r3]=r0	// clear error indication in slot for r10 and set unat bit
-END(ia64_ret_from_ia32_execve_syscall)
+END(ia64_ret_from_ia32_execve)
 	// fall through
 #endif /* CONFIG_IA32_SUPPORT */
 GLOBAL_ENTRY(ia64_leave_kernel)

arch/ia64/kernel/fsys.S

···
 	movl r2=ia64_ret_from_syscall
 	;;
 	mov rp=r2				// set the real return addr
-	tbit.z p8,p0=r3,TIF_SYSCALL_TRACE
+	and r3=_TIF_SYSCALL_TRACEAUDIT,r3
 	;;
+	cmp.eq p8,p0=r3,r0
+
 (p10)	br.cond.spnt.many ia64_ret_from_syscall	// p10==true means out registers are more than 8
 (p8)	br.call.sptk.many b6=b6		// ignore this return addr
 	br.cond.sptk ia64_trace_syscall

arch/ia64/kernel/mca_drv.c

···
 	spin_unlock(&mca_bh_lock);
 
 	/* This process is about to be killed itself */
-	force_sig(SIGKILL, current);
-	schedule();
+	do_exit(SIGKILL);
 }
 
 /**
···
 			psr2 = (struct ia64_psr *)&pmsa->pmsa_ipsr;
 			psr2->cpl = 0;
 			psr2->ri  = 0;
+			psr2->i  = 0;
 
 			return 1;
 		}

arch/ia64/kernel/mca_drv_asm.S

···
 
 #include <asm/asmmacro.h>
 #include <asm/processor.h>
+#include <asm/ptrace.h>
 
 GLOBAL_ENTRY(mca_handler_bhhook)
 	invala						// clear RSE ?
···
 	;;						
 	alloc		r16=ar.pfs,0,2,1,0		// make a new frame
 	;;
+	mov		ar.rsc=0
+	;;
 	mov		r13=IA64_KR(CURRENT)		// current task pointer
 	;;
-	adds		r12=IA64_TASK_THREAD_KSP_OFFSET,r13
+	mov		r2=r13
 	;;
-	ld8		r12=[r12]			// stack pointer
+	addl		r22=IA64_RBS_OFFSET,r2
 	;;
+	mov		ar.bspstore=r22
+	;;
+	addl		sp=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r2
+	;;
+	adds		r2=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13
+	;;
+	st1		[r2]=r0				// clear current->thread.on_ustack flag
 	mov		loc0=r16
 	movl		loc1=mca_handler_bh		// recovery C function
 	;;
···
 	;;
 	mov		loc1=rp
 	;;
-	br.call.sptk.many    rp=b6			// not return ...
+	ssm		psr.i
+	;;
+	br.call.sptk.many    rp=b6			// does not return ...
 	;;
 	mov		ar.pfs=loc0
 	mov 		rp=loc1

arch/ia64/kernel/perfmon.c

···
 }
 EXPORT_SYMBOL(pfm_unregister_buffer_fmt);
 
+extern void update_pal_halt_status(int);
+
 static int
 pfm_reserve_session(struct task_struct *task, int is_syswide, unsigned int cpu)
 {
···
 		pfm_sessions.pfs_sys_use_dbregs,
 		is_syswide,
 		cpu));
+
+	/*
+	 * disable default_idle() to go to PAL_HALT
+	 */
+	update_pal_halt_status(0);
 
 	UNLOCK_PFS(flags);
 
···
 		pfm_sessions.pfs_sys_use_dbregs,
 		is_syswide,
 		cpu));
+
+	/*
+	 * if possible, enable default_idle() to go into PAL_HALT
+	 */
+	if (pfm_sessions.pfs_task_sessions == 0 && pfm_sessions.pfs_sys_sessions == 0)
+		update_pal_halt_status(1);
 
 	UNLOCK_PFS(flags);
 
···
 		DPRINT(("cannot load to [%d], invalid ctx_state=%d\n",
 			req->load_pid,
 			ctx->ctx_state));
-		return -EINVAL;
+		return -EBUSY;
 	}
 
 	DPRINT(("load_pid [%d] using_dbreg=%d\n", req->load_pid, ctx->ctx_fl_using_dbreg));
···
 	if (task == current || ctx->ctx_fl_system) return 0;
 
 	/*
-	 * if context is UNLOADED we are safe to go
+	 * we are monitoring another thread
 	 */
-	if (state == PFM_CTX_UNLOADED) return 0;
-
-	/*
-	 * no command can operate on a zombie context
-	 */
-	if (state == PFM_CTX_ZOMBIE) {
-		DPRINT(("cmd %d state zombie cannot operate on context\n", cmd));
-		return -EINVAL;
+	switch(state) {
+		case PFM_CTX_UNLOADED:
+			/*
+			 * if context is UNLOADED we are safe to go
+			 */
+			return 0;
+		case PFM_CTX_ZOMBIE:
+			/*
+			 * no command can operate on a zombie context
+			 */
+			DPRINT(("cmd %d state zombie cannot operate on context\n", cmd));
+			return -EINVAL;
+		case PFM_CTX_MASKED:
+			/*
+			 * PMU state has been saved to software even though
+			 * the thread may still be running.
+			 */
+			if (cmd != PFM_UNLOAD_CONTEXT) return 0;
 	}
 
 	/*

arch/ia64/kernel/process.c

···
 #include "sigframe.h"
 
 void (*ia64_mark_idle)(int);
-static cpumask_t cpu_idle_map;
+static DEFINE_PER_CPU(unsigned int, cpu_idle_state);
 
 unsigned long boot_option_idle_override = 0;
 EXPORT_SYMBOL(boot_option_idle_override);
···
 		ia64_do_signal(oldset, scr, in_syscall);
 }
 
-static int pal_halt = 1;
+static int pal_halt        = 1;
+static int can_do_pal_halt = 1;
+
 static int __init nohalt_setup(char * str)
 {
 	pal_halt = 0;
···
 }
 __setup("nohalt", nohalt_setup);
 
+void
+update_pal_halt_status(int status)
+{
+	can_do_pal_halt = pal_halt && status;
+}
+
 /*
  * We use this if we don't have any better idle routine..
  */
 void
 default_idle (void)
 {
-	unsigned long pmu_active = ia64_getreg(_IA64_REG_PSR) & (IA64_PSR_PP | IA64_PSR_UP);
-
 	while (!need_resched())
-		if (pal_halt && !pmu_active)
+		if (can_do_pal_halt)
 			safe_halt();
 		else
 			cpu_relax();
···
 }
 #endif /* CONFIG_HOTPLUG_CPU */
 
-
 void cpu_idle_wait(void)
 {
-        int cpu;
-        cpumask_t map;
+	unsigned int cpu, this_cpu = get_cpu();
+	cpumask_t map;
 
-        for_each_online_cpu(cpu)
-                cpu_set(cpu, cpu_idle_map);
+	set_cpus_allowed(current, cpumask_of_cpu(this_cpu));
+	put_cpu();
 
-        wmb();
-        do {
-                ssleep(1);
-                cpus_and(map, cpu_idle_map, cpu_online_map);
-        } while (!cpus_empty(map));
+	cpus_clear(map);
+	for_each_online_cpu(cpu) {
+		per_cpu(cpu_idle_state, cpu) = 1;
+		cpu_set(cpu, map);
+	}
+
+	__get_cpu_var(cpu_idle_state) = 0;
+
+	wmb();
+	do {
+		ssleep(1);
+		for_each_online_cpu(cpu) {
+			if (cpu_isset(cpu, map) && !per_cpu(cpu_idle_state, cpu))
+				cpu_clear(cpu, map);
+		}
+		cpus_and(map, map, cpu_online_map);
+	} while (!cpus_empty(map));
 }
 EXPORT_SYMBOL_GPL(cpu_idle_wait);
 
···
 cpu_idle (void)
 {
 	void (*mark_idle)(int) = ia64_mark_idle;
-	int cpu = smp_processor_id();
 
 	/* endless idle loop with no priority at all */
 	while (1) {
···
 		while (!need_resched()) {
 			void (*idle)(void);
 
+			if (__get_cpu_var(cpu_idle_state))
+				__get_cpu_var(cpu_idle_state) = 0;
+
+			rmb();
 			if (mark_idle)
 				(*mark_idle)(1);
 
-			if (cpu_isset(cpu, cpu_idle_map))
-				cpu_clear(cpu, cpu_idle_map);
-			rmb();
 			idle = pm_idle;
 			if (!idle)
 				idle = default_idle;

arch/ia64/kernel/signal.c

···
 	 * could be corrupted.
 	 */
 	retval = (long) &ia64_leave_kernel;
-	if (test_thread_flag(TIF_SYSCALL_TRACE))
+	if (test_thread_flag(TIF_SYSCALL_TRACE)
+	    || test_thread_flag(TIF_SYSCALL_AUDIT))
 		/*
 		 * strace expects to be notified after sigreturn returns even though the
 		 * context to which we return may not be in the middle of a syscall.

arch/ia64/lib/flush.S

···
 /*
  * Cache flushing routines.
  *
- * Copyright (C) 1999-2001 Hewlett-Packard Co
- * Copyright (C) 1999-2001 David Mosberger-Tang <[e-mail]>
+ * Copyright (C) 1999-2001, 2005 Hewlett-Packard Co
+ *	David Mosberger-Tang <[e-mail]>
  */
 #include <asm/asmmacro.h>
 #include <asm/page.h>
···
 
 	mov ar.lc=r8
 	;;
-.Loop:	fc in0				// issuable on M0 only
+.Loop:	fc.i in0			// issuable on M2 only
 	add in0=32,in0
 	br.cloop.sptk.few .Loop
 	;;

arch/ia64/lib/memcpy_mck.S

···
 	mov	f6=f0
 	br.cond.sptk .common_code
 	;;
+END(memcpy)
 GLOBAL_ENTRY(__copy_user)
 	.prologue
 // check dest alignment
···
 #undef B
 #undef C
 #undef D
-END(memcpy)
 
 /*
  * Due to lack of local tag support in gcc 2.x assembler, it is not clear which

arch/ia64/lib/memset.S

···
 { .mmi
 	.prologue
 	alloc	tmp = ar.pfs, 3, 0, 0, 0
-	.body
 	lfetch.nt1 [dest]			//
 	.save   ar.lc, save_lc
 	mov.i	save_lc = ar.lc
+	.body
 } { .mmi
 	mov	ret0 = dest			// return value
 	cmp.ne	p_nz, p_zr = value, r0		// use stf.spill if value is zero

arch/ia64/sn/kernel/Makefile

···
 # License.  See the file "COPYING" in the main directory of this archive
 # for more details.
 #
-# Copyright (C) 1999,2001-2003 Silicon Graphics, Inc.  All Rights Reserved.
+# Copyright (C) 1999,2001-2005 Silicon Graphics, Inc.  All Rights Reserved.
 #
 
 obj-y				+= setup.o bte.o bte_error.o irq.o mca.o idle.o \
 				   huberror.o io_init.o iomv.o klconflib.o sn2/
 obj-$(CONFIG_IA64_GENERIC)      += machvec.o
 obj-$(CONFIG_SGI_TIOCX)		+= tiocx.o
+obj-$(CONFIG_IA64_SGI_SN_XP)	+= xp.o
+xp-y				:= xp_main.o xp_nofault.o
+obj-$(CONFIG_IA64_SGI_SN_XP)	+= xpc.o
+xpc-y				:= xpc_main.o xpc_channel.o xpc_partition.o
+obj-$(CONFIG_IA64_SGI_SN_XP)	+= xpnet.o

arch/ia64/sn/kernel/io_init.c

···
 		if (status)
 			continue;
 
+		/* Attach the error interrupt handlers */
+		if (nasid & 1)
+			ice_error_init(hubdev);
+		else
+			hub_error_init(hubdev);
+
 		for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
 			hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
 
···
 			    sn_flush_device_list;
 		}
 
-		if (!(i & 1))
-			hub_error_init(hubdev);
-		else
-			ice_error_init(hubdev);
 	}
 
 }

arch/ia64/sn/kernel/mca.c

···
  * This function is the callback routine that SAL calls to log error
  * info for platform errors.  buf is appended to sn_oemdata, resizing as
  * required.
+ * Note: this is a SAL to OS callback, running under the same rules as the SAL
+ * code.  SAL calls are run with preempt disabled so this routine must not
+ * sleep.  vmalloc can sleep so print_hook cannot resize the output buffer
+ * itself, instead it must set the required size and return to let the caller
+ * resize the buffer then redrive the SAL call.
  */
 static int print_hook(const char *fmt, ...)
 {
···
 	vsnprintf(buf, sizeof(buf), fmt, args);
 	va_end(args);
 	len = strlen(buf);
-	while (*sn_oemdata_size + len + 1 > sn_oemdata_bufsize) {
-		u8 *newbuf = vmalloc(sn_oemdata_bufsize += 1000);
-		if (!newbuf) {
-			printk(KERN_ERR "%s: unable to extend sn_oemdata\n",
-			       __FUNCTION__);
-			return 0;
-		}
-		memcpy(newbuf, *sn_oemdata, *sn_oemdata_size);
-		vfree(*sn_oemdata);
-		*sn_oemdata = newbuf;
-	}
-	memcpy(*sn_oemdata + *sn_oemdata_size, buf, len + 1);
+	if (*sn_oemdata_size + len <= sn_oemdata_bufsize)
+		memcpy(*sn_oemdata + *sn_oemdata_size, buf, len);
 	*sn_oemdata_size += len;
 	return 0;
 }
···
 	sn_oemdata = oemdata;
 	sn_oemdata_size = oemdata_size;
 	sn_oemdata_bufsize = 0;
-	ia64_sn_plat_specific_err_print(print_hook, (char *)sect_header);
+	*sn_oemdata_size = PAGE_SIZE;	/* first guess at how much data will be generated */
+	while (*sn_oemdata_size > sn_oemdata_bufsize) {
+		u8 *newbuf = vmalloc(*sn_oemdata_size);
+		if (!newbuf) {
+			printk(KERN_ERR "%s: unable to extend sn_oemdata\n",
+			       __FUNCTION__);
+			return 1;
+		}
+		vfree(*sn_oemdata);
+		*sn_oemdata = newbuf;
+		sn_oemdata_bufsize = *sn_oemdata_size;
+		*sn_oemdata_size = 0;
+		ia64_sn_plat_specific_err_print(print_hook, (char *)sect_header);
+	}
 	up(&sn_oemdata_mutex);
 	return 0;
 }

arch/ia64/sn/kernel/setup.c

···
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 1999,2001-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 1999,2001-2005 Silicon Graphics, Inc. All rights reserved.
  */
 
 #include <linux/config.h>
···
 
 DEFINE_PER_CPU(struct sn_hub_info_s, __sn_hub_info);
 EXPORT_PER_CPU_SYMBOL(__sn_hub_info);
+
+DEFINE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_NUMNODES]);
+EXPORT_PER_CPU_SYMBOL(__sn_cnodeid_to_nasid);
+
+DEFINE_PER_CPU(struct nodepda_s *, __sn_nodepda);
+EXPORT_PER_CPU_SYMBOL(__sn_nodepda);
 
 partid_t sn_partid = -1;
 EXPORT_SYMBOL(sn_partid);
···
 {
 	cnodeid_t cnode;
 
-	memset(pda->cnodeid_to_nasid_table, -1,
-	       sizeof(pda->cnodeid_to_nasid_table));
+	memset(sn_cnodeid_to_nasid, -1,
+			sizeof(__ia64_per_cpu_var(__sn_cnodeid_to_nasid)));
 	for_each_online_node(cnode)
-		pda->cnodeid_to_nasid_table[cnode] =
-		    pxm_to_nasid(nid_to_pxm_map[cnode]);
+		sn_cnodeid_to_nasid[cnode] =
+				pxm_to_nasid(nid_to_pxm_map[cnode]);
 
 	numionodes = num_online_nodes();
 	scan_for_ionodes();
···
 
 	cnode = nasid_to_cnodeid(nasid);
 
-	pda->p_nodepda = nodepdaindr[cnode];
+	sn_nodepda = nodepdaindr[cnode];
+
 	pda->led_address =
 	    (typeof(pda->led_address)) (LED0 + (slice << LED_CPU_SHIFT));
 	pda->led_state = LED_ALWAYS_SET;
···
 	pda->idle_flag = 0;
 
 	if (cpuid != 0) {
-		memcpy(pda->cnodeid_to_nasid_table,
-		       pdacpu(0)->cnodeid_to_nasid_table,
-		       sizeof(pda->cnodeid_to_nasid_table));
+		/* copy cpu 0's sn_cnodeid_to_nasid table to this cpu's */
+		memcpy(sn_cnodeid_to_nasid,
+		       (&per_cpu(__sn_cnodeid_to_nasid, 0)),
+		       sizeof(__ia64_per_cpu_var(__sn_cnodeid_to_nasid)));
 	}
 
 	/*
 	 * Check for WARs.
 	 * Only needs to be done once, on BSP.
-	 * Has to be done after loop above, because it uses pda.cnodeid_to_nasid_table[i].
+	 * Has to be done after loop above, because it uses this cpu's
+	 * sn_cnodeid_to_nasid table which was just initialized if this
+	 * isn't cpu 0.
 	 * Has to be done before assignment below.
 	 */
 	if (!wars_have_been_checked) {
···
 		brd = find_lboard_any(brd, KLTYPE_SNIA);
 
 		while (brd) {
-			pda->cnodeid_to_nasid_table[numionodes] =
-			    brd->brd_nasid;
+			sn_cnodeid_to_nasid[numionodes] = brd->brd_nasid;
 			physical_node_map[brd->brd_nasid] = numionodes;
 			root_lboard[numionodes] = brd;
 			numionodes++;
···
 				      root_lboard[nasid_to_cnodeid(nasid)],
 				      KLTYPE_TIO);
 		while (brd) {
-			pda->cnodeid_to_nasid_table[numionodes] =
-			    brd->brd_nasid;
+			sn_cnodeid_to_nasid[numionodes] = brd->brd_nasid;
 			physical_node_map[brd->brd_nasid] = numionodes;
 			root_lboard[numionodes] = brd;
 			numionodes++;
···
 			brd = find_lboard_any(brd, KLTYPE_TIO);
 		}
 	}
-
 }
 
 int
···
 	long cpu;
 	
 	for (cpu=0; cpu < NR_CPUS; cpu++) 
-		if (nodepda->phys_cpuid[cpu].nasid == nasid && nodepda->phys_cpuid[cpu].slice == slice)
+		if (cpuid_to_nasid(cpu) == nasid &&
+					cpuid_to_slice(cpu) == slice)
 			return cpu;
 
 	return -1;

arch/ia64/sn/kernel/tiocx.c

···
 #include <asm/sn/types.h>
 #include <asm/sn/shubio.h>
 #include <asm/sn/tiocx.h>
+#include <asm/sn/l1.h>
+#include <asm/sn/module.h>
 #include "tio.h"
 #include "xtalk/xwidgetdev.h"
 #include "xtalk/hubdev.h"
···
 	}
 }
 
-uint64_t
-tiocx_dma_addr(uint64_t addr)
+uint64_t tiocx_dma_addr(uint64_t addr)
 {
 	return PHYS_TO_TIODMA(addr);
 }
 
-uint64_t
-tiocx_swin_base(int nasid)
+uint64_t tiocx_swin_base(int nasid)
 {
 	return TIO_SWIN_BASE(nasid, TIOCX_CORELET);
 }
···
 EXPORT_SYMBOL(tiocx_bus_type);
 EXPORT_SYMBOL(tiocx_dma_addr);
 EXPORT_SYMBOL(tiocx_swin_base);
-
-static uint64_t tiocx_get_hubdev_info(u64 handle, u64 address)
-{
-
-	struct ia64_sal_retval ret_stuff;
-	ret_stuff.status = 0;
-	ret_stuff.v0 = 0;
-
-	ia64_sal_oemcall_nolock(&ret_stuff,
-				SN_SAL_IOIF_GET_HUBDEV_INFO,
-				handle, address, 0, 0, 0, 0, 0);
-	return ret_stuff.v0;
-}
 
 static void tio_conveyor_set(nasid_t nasid, int enable_flag)
 {
···
 	udelay(2000);
 }
 
-static int fpga_attached(nasid_t nasid)
+static int tiocx_btchar_get(int nasid)
+{
+	moduleid_t module_id;
+	geoid_t geoid;
+	int cnodeid;
+
+	cnodeid = nasid_to_cnodeid(nasid);
+	geoid = cnodeid_get_geoid(cnodeid);
+	module_id = geo_module(geoid);
+	return MODULE_GET_BTCHAR(module_id);
+}
+
+static int is_fpga_brick(int nasid)
+{
+	switch (tiocx_btchar_get(nasid)) {
+	case L1_BRICKTYPE_SA:
+	case L1_BRICKTYPE_ATHENA:
+		return 1;
+	}
+	return 0;
+}
+
+static int bitstream_loaded(nasid_t nasid)
 {
 	uint64_t cx_credits;
 
···
 	int mfg_num = CX_DEV_NONE;
 	nasid_t nasid = cx_dev->cx_id.nasid;
 
-	if (fpga_attached(nasid)) {
+	if (bitstream_loaded(nasid)) {
 		uint64_t cx_id;
 
 		cx_id =
···
 {
 	struct cx_dev *cx_dev = to_cx_dev(dev);
 
-	return sprintf(buf, "0x%x 0x%x 0x%x\n",
+	return sprintf(buf, "0x%x 0x%x 0x%x %d\n",
 		       cx_dev->cx_id.nasid,
-		       cx_dev->cx_id.part_num, cx_dev->cx_id.mfg_num);
+		       cx_dev->cx_id.part_num, cx_dev->cx_id.mfg_num,
+		       tiocx_btchar_get(cx_dev->cx_id.nasid));
 }
 
 static ssize_t store_cxdev_control(struct device *dev, const char *buf,
···
 		if ((nasid = cnodeid_to_nasid(cnodeid)) < 0)
 			break;	/* No more nasids .. bail out of loop */
 
-		if (nasid & 0x1) {	/* TIO's are always odd */
+		if ((nasid & 0x1) && is_fpga_brick(nasid)) {
 			struct hubdev_info *hubdev;
-			uint64_t status;
 			struct xwidget_info *widgetp;
 
 			DBG("Found TIO at nasid 0x%x\n", nasid);
 
 			hubdev =
 			    (struct hubdev_info *)(NODEPDA(cnodeid)->pdinfo);
-			status =
-			    tiocx_get_hubdev_info(nasid,
-						  (uint64_t) __pa(hubdev));
-			if (status)
-				continue;
 
 			widgetp = &hubdev->hdi_xwidget_info[TIOCX_CORELET];
 

arch/ia64/sn/kernel/xp_main.c

···
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2004-2005 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+
+
+/*
+ * Cross Partition (XP) base.
+ *
+ *	XP provides a base from which its users can interact
+ *	with XPC, yet not be dependent on XPC.
+ *
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <asm/sn/intr.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/sn/xp.h>
+
+
+/*
+ * Target of nofault PIO read.
+ */
+u64 xp_nofault_PIOR_target;
+
+
+/*
+ * xpc_registrations[] keeps track of xpc_connect()'s done by the kernel-level
+ * users of XPC.
+ */
+struct xpc_registration xpc_registrations[XPC_NCHANNELS];
+
+
+/*
+ * Initialize the XPC interface to indicate that XPC isn't loaded.
+ */
+static enum xpc_retval xpc_notloaded(void) { return xpcNotLoaded; }
+
+struct xpc_interface xpc_interface = {
+	(void (*)(int)) xpc_notloaded,
+	(void (*)(int)) xpc_notloaded,
+	(enum xpc_retval (*)(partid_t, int, u32, void **)) xpc_notloaded,
+	(enum xpc_retval (*)(partid_t, int, void *)) xpc_notloaded,
+	(enum xpc_retval (*)(partid_t, int, void *, xpc_notify_func, void *))
+							xpc_notloaded,
+	(void (*)(partid_t, int, void *)) xpc_notloaded,
+	(enum xpc_retval (*)(partid_t, void *)) xpc_notloaded
+};
+
+
+/*
+ * XPC calls this when it (the XPC module) has been loaded.
+ */
+void
+xpc_set_interface(void (*connect)(int),
+		void (*disconnect)(int),
+		enum xpc_retval (*allocate)(partid_t, int, u32, void **),
+		enum xpc_retval (*send)(partid_t, int, void *),
+		enum xpc_retval (*send_notify)(partid_t, int, void *,
+						xpc_notify_func, void *),
+		void (*received)(partid_t, int, void *),
+		enum xpc_retval (*partid_to_nasids)(partid_t, void *))
+{
+	xpc_interface.connect = connect;
+	xpc_interface.disconnect = disconnect;
+	xpc_interface.allocate = allocate;
+	xpc_interface.send = send;
+	xpc_interface.send_notify = send_notify;
+	xpc_interface.received = received;
+	xpc_interface.partid_to_nasids = partid_to_nasids;
+}
+
+
+/*
+ * XPC calls this when it (the XPC module) is being unloaded.
+ */
+void
+xpc_clear_interface(void)
+{
+	xpc_interface.connect = (void (*)(int)) xpc_notloaded;
+	xpc_interface.disconnect = (void (*)(int)) xpc_notloaded;
+	xpc_interface.allocate = (enum xpc_retval (*)(partid_t, int, u32,
+					void **)) xpc_notloaded;
+	xpc_interface.send = (enum xpc_retval (*)(partid_t, int, void *))
+					xpc_notloaded;
+	xpc_interface.send_notify = (enum xpc_retval (*)(partid_t, int, void *,
+				    xpc_notify_func, void *)) xpc_notloaded;
+	xpc_interface.received = (void (*)(partid_t, int, void *))
+					xpc_notloaded;
+	xpc_interface.partid_to_nasids = (enum xpc_retval (*)(partid_t, void *))
+					xpc_notloaded;
+}
+
+
+/*
+ * Register for automatic establishment of a channel connection whenever
+ * a partition comes up.
+ *
+ * Arguments:
+ *
+ *	ch_number - channel # to register for connection.
+ *	func - function to call for asynchronous notification of channel
+ *	       state changes (i.e., connection, disconnection, error) and
+ *	       the arrival of incoming messages.
+ *      key - pointer to optional user-defined value that gets passed back
+ *	      to the user on any callouts made to func.
+ *	payload_size - size in bytes of the XPC message's payload area which
+ *		       contains a user-defined message. The user should make
+ *		       this large enough to hold their largest message.
+ *	nentries - max #of XPC message entries a message queue can contain.
+ *		   The actual number, which is determined when a connection
+ * 		   is established and may be less then requested, will be
+ *		   passed to the user via the xpcConnected callout.
+ *	assigned_limit - max number of kthreads allowed to be processing
+ * 			 messages (per connection) at any given instant.
+ *	idle_limit - max number of kthreads allowed to be idle at any given
+ * 		     instant.
+ */
+enum xpc_retval
+xpc_connect(int ch_number, xpc_channel_func func, void *key, u16 payload_size,
+		u16 nentries, u32 assigned_limit, u32 idle_limit)
+{
+	struct xpc_registration *registration;
+
+
+	DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
+	DBUG_ON(payload_size == 0 || nentries == 0);
+	DBUG_ON(func == NULL);
+	DBUG_ON(assigned_limit == 0 || idle_limit > assigned_limit);
+
+	registration = &xpc_registrations[ch_number];
+
+	if (down_interruptible(&registration->sema) != 0) {
+		return xpcInterrupted;
+	}
+
+	/* if XPC_CHANNEL_REGISTERED(ch_number) */
+	if (registration->func != NULL) {
+		up(&registration->sema);
+		return xpcAlreadyRegistered;
+	}
+
+	/* register the channel for connection */
+	registration->msg_size = XPC_MSG_SIZE(payload_size);
+	registration->nentries = nentries;
+	registration->assigned_limit = assigned_limit;
+	registration->idle_limit = idle_limit;
+	registration->key = key;
+	registration->func = func;
+
+	up(&registration->sema);
+
+	xpc_interface.connect(ch_number);
+
+	return xpcSuccess;
+}
+
+
+/*
+ * Remove the registration for automatic connection of the specified channel
+ * when a partition comes up.
+ *
+ * Before returning this xpc_disconnect() will wait for all connections on the
+ * specified channel have been closed/torndown. So the caller can be assured
+ * that they will not be receiving any more callouts from XPC to their
+ * function registered via xpc_connect().
+ *
+ * Arguments:
+ *
+ *	ch_number - channel # to unregister.
+ */
+void
+xpc_disconnect(int ch_number)
+{
+	struct xpc_registration *registration;
+
+
+	DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
+
+	registration = &xpc_registrations[ch_number];
+
+	/*
+	 * We've decided not to make this a down_interruptible(), since we
+	 * figured XPC's users will just turn around and call xpc_disconnect()
+	 * again anyways, so we might as well wait, if need be.
+	 */
+	down(&registration->sema);
+
+	/* if !XPC_CHANNEL_REGISTERED(ch_number) */
+	if (registration->func == NULL) {
+		up(&registration->sema);
+		return;
+	}
+
+	/* remove the connection registration for the specified channel */
+	registration->func = NULL;
+	registration->key = NULL;
+	registration->nentries = 0;
+	registration->msg_size = 0;
+	registration->assigned_limit = 0;
+	registration->idle_limit = 0;
+
+	xpc_interface.disconnect(ch_number);
+
+	up(&registration->sema);
+
+	return;
+}
+
+
+int __init
+xp_init(void)
+{
+	int ret, ch_number;
+	u64 func_addr = *(u64 *) xp_nofault_PIOR;
+	u64 err_func_addr = *(u64 *) xp_error_PIOR;
+
+
+	if (!ia64_platform_is("sn2")) {
+		return -ENODEV;
+	}
+
+	/*
+	 * Register a nofault code region which performs a cross-partition
+	 * PIO read. If the PIO read times out, the MCA handler will consume
+	 * the error and return to a kernel-provided instruction to indicate
+	 * an error. This PIO read exists because it is guaranteed to timeout
+	 * if the destination is down (AMO operations do not timeout on at
+	 * least some CPUs on Shubs <= v1.2, which unfortunately we have to
+	 * work around).
+	 */
+	if ((ret = sn_register_nofault_code(func_addr, err_func_addr,
+						err_func_addr, 1, 1)) != 0) {
+		printk(KERN_ERR "XP: can't register nofault code, error=%d\n",
+			ret);
+	}
+	/*
+	 * Setup the nofault PIO read target. (There is no special reason why
+	 * SH_IPI_ACCESS was selected.)
+	 */
+	if (is_shub2()) {
+		xp_nofault_PIOR_target = SH2_IPI_ACCESS0;
+	} else {
+		xp_nofault_PIOR_target = SH1_IPI_ACCESS;
+	}
+
+	/* initialize the connection registration semaphores */
+	for (ch_number = 0; ch_number < XPC_NCHANNELS; ch_number++) {
+		sema_init(&xpc_registrations[ch_number].sema, 1);  /* mutex */
+	}
+
+	return 0;
+}
+module_init(xp_init);
+
+
+void __exit
+xp_exit(void)
+{
+	u64 func_addr = *(u64 *) xp_nofault_PIOR;
+	u64 err_func_addr = *(u64 *) xp_error_PIOR;
+
+
+	/* unregister the PIO read nofault code region */
+	(void) sn_register_nofault_code(func_addr, err_func_addr,
+					err_func_addr, 1, 0);
+}
+module_exit(xp_exit);
+
+
+MODULE_AUTHOR("Silicon Graphics, Inc.");
+MODULE_DESCRIPTION("Cross Partition (XP) base");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(xp_nofault_PIOR);
+EXPORT_SYMBOL(xp_nofault_PIOR_target);
+EXPORT_SYMBOL(xpc_registrations);
+EXPORT_SYMBOL(xpc_interface);
+EXPORT_SYMBOL(xpc_clear_interface);
+EXPORT_SYMBOL(xpc_set_interface);
+EXPORT_SYMBOL(xpc_connect);
+EXPORT_SYMBOL(xpc_disconnect);
+

arch/ia64/sn/kernel/xp_nofault.S

···
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2004-2005 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+
+
+/*
+ * The xp_nofault_PIOR function takes a pointer to a remote PIO register
+ * and attempts to load and consume a value from it.  This function
+ * will be registered as a nofault code block.  In the event that the
+ * PIO read fails, the MCA handler will force the error to look
+ * corrected and vector to the xp_error_PIOR which will return an error.
+ *
+ *	extern int xp_nofault_PIOR(void *remote_register);
+ */
+
+	.global xp_nofault_PIOR
+xp_nofault_PIOR:
+	mov	r8=r0			// Stage a success return value
+	ld8.acq	r9=[r32];;		// PIO Read the specified register
+	adds	r9=1,r9			// Add to force a consume
+	br.ret.sptk.many b0;;		// Return success
+
+	.global xp_error_PIOR
+xp_error_PIOR:
+	mov	r8=1			// Return value of 1
+	br.ret.sptk.many b0;;		// Return failure
+

arch/ia64/sn/kernel/xpc.h

···
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2004-2005 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+
+
+/*
+ * Cross Partition Communication (XPC) structures and macros.
+ */
+
+#ifndef _IA64_SN_KERNEL_XPC_H
+#define _IA64_SN_KERNEL_XPC_H
+
+
+#include <linux/config.h>
+#include <linux/interrupt.h>
+#include <linux/sysctl.h>
+#include <linux/device.h>
+#include <asm/pgtable.h>
+#include <asm/processor.h>
+#include <asm/sn/bte.h>
+#include <asm/sn/clksupport.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/mspec.h>
+#include <asm/sn/shub_mmr.h>
+#include <asm/sn/xp.h>
+
+
+/*
+ * XPC Version numbers consist of a major and minor number. XPC can always
+ * talk to versions with same major #, and never talk to versions with a
+ * different major #.
+ */
+#define _XPC_VERSION(_maj, _min)	(((_maj) << 4) | ((_min) & 0xf))
+#define XPC_VERSION_MAJOR(_v)		((_v) >> 4)
+#define XPC_VERSION_MINOR(_v)		((_v) & 0xf)
+
+
+/*
+ * The next macros define word or bit representations for given
+ * C-brick nasid in either the SAL provided bit array representing
+ * nasids in the partition/machine or the AMO_t array used for
+ * inter-partition initiation communications.
+ *
+ * For SN2 machines, C-Bricks are alway even numbered NASIDs.  As
+ * such, some space will be saved by insisting that nasid information
+ * passed from SAL always be packed for C-Bricks and the
+ * cross-partition interrupts use the same packing scheme.
+ */
+#define XPC_NASID_W_INDEX(_n)	(((_n) / 64) / 2)
+#define XPC_NASID_B_INDEX(_n)	(((_n) / 2) & (64 - 1))
+#define XPC_NASID_IN_ARRAY(_n, _p) ((_p)[XPC_NASID_W_INDEX(_n)] & \
+				    (1UL << XPC_NASID_B_INDEX(_n)))
+#define XPC_NASID_FROM_W_B(_w, _b) (((_w) * 64 + (_b)) * 2)
+
+#define XPC_HB_DEFAULT_INTERVAL		5	/* incr HB every x secs */
+#define XPC_HB_CHECK_DEFAULT_TIMEOUT	20	/* check HB every x secs */
+
+/* define the process name of HB checker and the CPU it is pinned to */
+#define XPC_HB_CHECK_THREAD_NAME	"xpc_hb"
+#define XPC_HB_CHECK_CPU		0
+
+/* define the process name of the discovery thread */
+#define XPC_DISCOVERY_THREAD_NAME	"xpc_discovery"
+
+
+#define XPC_HB_ALLOWED(_p, _v)	((_v)->heartbeating_to_mask & (1UL << (_p)))
+#define XPC_ALLOW_HB(_p, _v)	(_v)->heartbeating_to_mask |= (1UL << (_p))
+#define XPC_DISALLOW_HB(_p, _v)	(_v)->heartbeating_to_mask &= (~(1UL << (_p)))
+
+
+/*
+ * Reserved Page provided by SAL.
+ *
+ * SAL provides one page per partition of reserved memory.  When SAL
+ * initialization is complete, SAL_signature, SAL_version, partid,
+ * part_nasids, and mach_nasids are set.
+ *
+ * Note: Until vars_pa is set, the partition XPC code has not been initialized.
+ */
+struct xpc_rsvd_page {
+	u64 SAL_signature;	/* SAL unique signature */
+	u64 SAL_version;	/* SAL specified version */
+	u8 partid;		/* partition ID from SAL */
+	u8 version;
+	u8 pad[6];		/* pad to u64 align */
+	u64 vars_pa;
+	u64 part_nasids[XP_NASID_MASK_WORDS] ____cacheline_aligned;
+	u64 mach_nasids[XP_NASID_MASK_WORDS] ____cacheline_aligned;
+};
+#define XPC_RP_VERSION _XPC_VERSION(1,0) /* version 1.0 of the reserved page */
+
+#define XPC_RSVD_PAGE_ALIGNED_SIZE \
+			(L1_CACHE_ALIGN(sizeof(struct xpc_rsvd_page)))
+
+
+/*
+ * Define the structures by which XPC variables can be exported to other
+ * partitions. (There are two: struct xpc_vars and struct xpc_vars_part)
+ */
+
+/*
+ * The following structure describes the partition generic variables
+ * needed by other partitions in order to properly initialize.
+ *
+ * struct xpc_vars version number also applies to struct xpc_vars_part.
+ * Changes to either structure and/or related functionality should be
+ * reflected by incrementing either the major or minor version numbers
+ * of struct xpc_vars.
+ */
+struct xpc_vars {
+	u8 version;
+	u64 heartbeat;
+	u64 heartbeating_to_mask;
+	u64 kdb_status;		/* 0 = machine running */
+	int act_nasid;
+	int act_phys_cpuid;
+	u64 vars_part_pa;
+	u64 amos_page_pa;	/* paddr of page of AMOs from MSPEC driver */
+	AMO_t *amos_page;	/* vaddr of page of AMOs from MSPEC driver */
+	AMO_t *act_amos;	/* pointer to the first activation AMO */
+};
+#define XPC_V_VERSION _XPC_VERSION(3,0) /* version 3.0 of the cross vars */
+
+#define XPC_VARS_ALIGNED_SIZE  (L1_CACHE_ALIGN(sizeof(struct xpc_vars)))
+
+/*
+ * The following structure describes the per partition specific variables.
+ *
+ * An array of these structures, one per partition, will be defined. As a
+ * partition becomes active XPC will copy the array entry corresponding to
+ * itself from that partition. It is desirable that the size of this
+ * structure evenly divide into a cacheline, such that none of the entries
+ * in this array crosses a cacheline boundary. As it is now, each entry
+ * occupies half a cacheline.
+ */
+struct xpc_vars_part {
+	u64 magic;
+
+	u64 openclose_args_pa;	/* physical address of open and close args */
+	u64 GPs_pa;		/* physical address of Get/Put values */
+
+	u64 IPI_amo_pa;		/* physical address of IPI AMO_t structure */
+	int IPI_nasid;		/* nasid of where to send IPIs */
+	int IPI_phys_cpuid;	/* physical CPU ID of where to send IPIs */
+
+	u8 nchannels;		/* #of defined channels supported */
+
+	u8 reserved[23];	/* pad to a full 64 bytes */
+};
+
+/*
+ * The vars_part MAGIC numbers play a part in the first contact protocol.
+ *
+ * MAGIC1 indicates that the per partition specific variables for a remote
+ * partition have been initialized by this partition.
+ *
+ * MAGIC2 indicates that this partition has pulled the remote partititions
+ * per partition variables that pertain to this partition.
+ */
+#define XPC_VP_MAGIC1	0x0053524156435058L  /* 'XPCVARS\0'L (little endian) */
+#define XPC_VP_MAGIC2	0x0073726176435058L  /* 'XPCvars\0'L (little endian) */
+
+
+
+/*
+ * Functions registered by add_timer() or called by kernel_thread() only
+ * allow for a single 64-bit argument. The following macros can be used to
+ * pack and unpack two (32-bit, 16-bit or 8-bit) arguments into or out from
+ * the passed argument.
+ */
+#define XPC_PACK_ARGS(_arg1, _arg2) \
+			((((u64) _arg1) & 0xffffffff) | \
+			((((u64) _arg2) & 0xffffffff) << 32))
+
+#define XPC_UNPACK_ARG1(_args)	(((u64) _args) & 0xffffffff)
+#define XPC_UNPACK_ARG2(_args)	((((u64) _args) >> 32) & 0xffffffff)
+
+
+
+/*
+ * Define a Get/Put value pair (pointers) used with a message queue.
+ */
+struct xpc_gp {
+	s64 get;	/* Get value */
+	s64 put;	/* Put value */
+};
+
+#define XPC_GP_SIZE \
+		L1_CACHE_ALIGN(sizeof(struct xpc_gp) * XPC_NCHANNELS)
+
+
+
+/*
+ * Define a structure that contains arguments associated with opening and
+ * closing a channel.
+ */
+struct xpc_openclose_args {
+	u16 reason;		/* reason why channel is closing */
+	u16 msg_size;		/* sizeof each message entry */
+	u16 remote_nentries;	/* #of message entries in remote msg queue */
+	u16 local_nentries;	/* #of message entries in local msg queue */
+	u64 local_msgqueue_pa;	/* physical address of local message queue */
+};
+
+#define XPC_OPENCLOSE_ARGS_SIZE \
+	      L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * XPC_NCHANNELS)
+
+
+
+/* struct xpc_msg flags */
+
+#define	XPC_M_DONE		0x01	/* msg has been received/consumed */
+#define	XPC_M_READY		0x02	/* msg is ready to be sent */
+#define	XPC_M_INTERRUPT		0x04	/* send interrupt when msg consumed */
+
+
+#define XPC_MSG_ADDRESS(_payload) \
+		((struct xpc_msg *)((u8 *)(_payload) - XPC_MSG_PAYLOAD_OFFSET))
+
+
+
+/*
+ * Defines notify entry.
+ *
+ * This is used to notify a message's sender that their message was received
+ * and consumed by the intended recipient.
+ */
+struct xpc_notify {
+	struct semaphore sema;		/* notify semaphore */
+	u8 type;			/* type of notification */
+
+	/* the following two fields are only used if type == XPC_N_CALL */
+	xpc_notify_func func;		/* user's notify function */
+	void *key;			/* pointer to user's key */
+};
+
+/* struct xpc_notify type of notification */
+
+#define	XPC_N_CALL		0x01	/* notify function provided by user */
+
+
+
+/*
+ * Define the structure that manages all the stuff required by a channel. In
+ * particular, they are used to manage the messages sent across the channel.
+ *
+ * This structure is private to a partition, and is NOT shared across the
+ * partition boundary.
+ *
+ * There is an array of these structures for each remote partition. It is
+ * allocated at the time a partition becomes active. The array contains one
+ * of these structures for each potential channel connection to that partition.
+ *
+ * Each of these structures manages two message queues (circular buffers).
+ * They are allocated at the time a channel connection is made. One of
+ * these message queues (local_msgqueue) holds the locally created messages
+ * that are destined for the remote partition. The other of these message
+ * queues (remote_msgqueue) is a locally cached copy of the remote partition's
+ * own local_msgqueue.
+ *
+ * The following is a description of the Get/Put pointers used to manage these
+ * two message queues. Consider the local_msgqueue to be on one partition
+ * and the remote_msgqueue to be its cached copy on another partition. A
+ * description of what each of the lettered areas contains is included.
+ *
+ *
+ *                     local_msgqueue      remote_msgqueue
+ *
+ *                        |/////////|      |/////////|
+ *    w_remote_GP.get --> +---------+      |/////////|
+ *                        |    F    |      |/////////|
+ *     remote_GP.get  --> +---------+      +---------+ <-- local_GP->get
+ *                        |         |      |         |
+ *                        |         |      |    E    |
+ *                        |         |      |         |
+ *                        |         |      +---------+ <-- w_local_GP.get
+ *                        |    B    |      |/////////|
+ *                        |         |      |////D////|
+ *                        |         |      |/////////|
+ *                        |         |      +---------+ <-- w_remote_GP.put
+ *                        |         |      |////C////|
+ *      local_GP->put --> +---------+      +---------+ <-- remote_GP.put
+ *                        |         |      |/////////|
+ *                        |    A    |      |/////////|
+ *                        |         |      |/////////|
+ *     w_local_GP.put --> +---------+      |/////////|
+ *                        |/////////|      |/////////|
+ *
+ *
+ *	    ( remote_GP.[get|put] are cached copies of the remote
+ *	      partition's local_GP->[get|put], and thus their values can
+ *	      lag behind their counterparts on the remote partition. )
+ *
+ *
+ *  A - Messages that have been allocated, but have not yet been sent to the
+ *	remote partition.
+ *
+ *  B - Messages that have been sent, but have not yet been acknowledged by the
+ *      remote partition as having been received.
+ *
+ *  C - Area that needs to be prepared for the copying of sent messages, by
+ *	the clearing of the message flags of any previously received messages.
+ *
+ *  D - Area into which sent messages are to be copied from the remote
+ *	partition's local_msgqueue and then delivered to their intended
+ *	recipients. [ To allow for a multi-message copy, another pointer
+ *	(next_msg_to_pull) has been added to keep track of the next message
+ *	number needing to be copied (pulled). It chases after w_remote_GP.put.
+ *	Any messages lying between w_local_GP.get and next_msg_to_pull have
+ *	been copied and are ready to be delivered. ]
+ *
+ *  E - Messages that have been copied and delivered, but have not yet been
+ *	acknowledged by the recipient as having been received.
+ *
+ *  F - Messages that have been acknowledged, but XPC has not yet notified the
+ *	sender that the message was received by its intended recipient.
+ *	This is also an area that needs to be prepared for the allocating of
+ *	new messages, by the clearing of the message flags of the acknowledged
+ *	messages.
+ */
+struct xpc_channel {
+	partid_t partid;		/* ID of remote partition connected */
+	spinlock_t lock;		/* lock for updating this structure */
+	u32 flags;			/* general flags */
+
+	enum xpc_retval reason;		/* reason why channel is disconnect'g */
+	int reason_line;		/* line# disconnect initiated from */
+
+	u16 number;			/* channel # */
+
+	u16 msg_size;			/* sizeof each msg entry */
+	u16 local_nentries;		/* #of msg entries in local msg queue */
+	u16 remote_nentries;		/* #of msg entries in remote msg queue*/
+
+	void *local_msgqueue_base;	/* base address of kmalloc'd space */
+	struct xpc_msg *local_msgqueue;	/* local message queue */
+	void *remote_msgqueue_base;	/* base address of kmalloc'd space */
+	struct xpc_msg *remote_msgqueue;/* cached copy of remote partition's */
+					/* local message queue */
+	u64 remote_msgqueue_pa;		/* phys addr of remote partition's */
+					/* local message queue */
+
+	atomic_t references;		/* #of external references to queues */
+
+	atomic_t n_on_msg_allocate_wq;   /* #on msg allocation wait queue */
+	wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */
+
+	/* queue of msg senders who want to be notified when msg received */
+
+	atomic_t n_to_notify;		/* #of msg senders to notify */
+	struct xpc_notify *notify_queue;/* notify queue for messages sent */
+
+	xpc_channel_func func;		/* user's channel function */
+	void *key;			/* pointer to user's key */
+
+	struct semaphore msg_to_pull_sema; /* next msg to pull serialization */
+	struct semaphore teardown_sema;    /* wait for teardown completion */
+
+	struct xpc_openclose_args *local_openclose_args; /* args passed on */
+					/* opening or closing of channel */
+
+	/* various flavors of local and remote Get/Put values */
+
+	struct xpc_gp *local_GP;	/* local Get/Put values */
+	struct xpc_gp remote_GP;	/* remote Get/Put values */
+	struct xpc_gp w_local_GP;	/* working local Get/Put values */
+	struct xpc_gp w_remote_GP;	/* working remote Get/Put values */
+	s64 next_msg_to_pull;		/* Put value of next msg to pull */
+
+	/* kthread management related fields */
+
+// >>> rethink having kthreads_assigned_limit and kthreads_idle_limit; perhaps
+// >>> allow the assigned limit be unbounded and let the idle limit be dynamic
+// >>> dependent on activity over the last interval of time
+	atomic_t kthreads_assigned;	/* #of kthreads assigned to channel */
+	u32 kthreads_assigned_limit; 	/* limit on #of kthreads assigned */
+	atomic_t kthreads_idle;		/* #of kthreads idle waiting for work */
+	u32 kthreads_idle_limit;	/* limit on #of kthreads idle */
+	atomic_t kthreads_active;	/* #of kthreads actively working */
+	// >>> following field is temporary
+	u32 kthreads_created;		/* total #of kthreads created */
+
+	wait_queue_head_t idle_wq;	/* idle kthread wait queue */
+
+} ____cacheline_aligned;
+
+
+/* struct xpc_channel flags */
+
+#define	XPC_C_WASCONNECTED	0x00000001 /* channel was connected */
+
+#define	XPC_C_ROPENREPLY	0x00000002 /* remote open channel reply */
+#define	XPC_C_OPENREPLY		0x00000004 /* local open channel reply */
+#define	XPC_C_ROPENREQUEST	0x00000008 /* remote open channel request */
+#define	XPC_C_OPENREQUEST	0x00000010 /* local open channel request */
+
+#define	XPC_C_SETUP		0x00000020 /* channel's msgqueues are alloc'd */
+#define	XPC_C_CONNECTCALLOUT	0x00000040 /* channel connected callout made */
+#define	XPC_C_CONNECTED		0x00000080 /* local channel is connected */
+#define	XPC_C_CONNECTING	0x00000100 /* channel is being connected */
+
+#define	XPC_C_RCLOSEREPLY	0x00000200 /* remote close channel reply */
+#define	XPC_C_CLOSEREPLY	0x00000400 /* local close channel reply */
+#define	XPC_C_RCLOSEREQUEST	0x00000800 /* remote close channel request */
+#define	XPC_C_CLOSEREQUEST	0x00001000 /* local close channel request */
+
+#define	XPC_C_DISCONNECTED	0x00002000 /* channel is disconnected */
+#define	XPC_C_DISCONNECTING	0x00004000 /* channel is being disconnected */
+
+
+
+/*
+ * Manages channels on a partition basis. There is one of these structures
+ * for each partition (a partition will never utilize the structure that
+ * represents itself).
+ */
+struct xpc_partition {
+
+	/* XPC HB infrastructure */
+
+	u64 remote_rp_pa;		/* phys addr of partition's rsvd pg */
+	u64 remote_vars_pa;		/* phys addr of partition's vars */
+	u64 remote_vars_part_pa;	/* phys addr of partition's vars part */
+	u64 last_heartbeat;		/* HB at last read */
+	u64 remote_amos_page_pa;	/* phys addr of partition's amos page */
+	int remote_act_nasid;		/* active part's act/deact nasid */
+	int remote_act_phys_cpuid;	/* active part's act/deact phys cpuid */
+	u32 act_IRQ_rcvd;		/* IRQs since activation */
+	spinlock_t act_lock;		/* protect updating of act_state */
+	u8 act_state;			/* from XPC HB viewpoint */
+	enum xpc_retval reason;		/* reason partition is deactivating */
+	int reason_line;		/* line# deactivation initiated from */
+	int reactivate_nasid;		/* nasid in partition to reactivate */
+
+
+	/* XPC infrastructure referencing and teardown control */
+
+	u8 setup_state;			/* infrastructure setup state */
+	wait_queue_head_t teardown_wq;	/* kthread waiting to teardown infra */
+	atomic_t references;		/* #of references to infrastructure */
+
+
+	/*
+	 * NONE OF THE PRECEDING FIELDS OF THIS STRUCTURE WILL BE CLEARED WHEN
+	 * XPC SETS UP THE NECESSARY INFRASTRUCTURE TO SUPPORT CROSS PARTITION
+	 * COMMUNICATION. ALL OF THE FOLLOWING FIELDS WILL BE CLEARED. (THE
+	 * 'nchannels' FIELD MUST BE THE FIRST OF THE FIELDS TO BE CLEARED.)
+	 */
+
+
+	u8 nchannels;		   /* #of defined channels supported */
+	atomic_t nchannels_active; /* #of channels that are not DISCONNECTED */
+	struct xpc_channel *channels;/* array of channel structures */
+
+	void *local_GPs_base;	  /* base address of kmalloc'd space */
+	struct xpc_gp *local_GPs; /* local Get/Put values */
+	void *remote_GPs_base;    /* base address of kmalloc'd space */
+	struct xpc_gp *remote_GPs;/* copy of remote partition's local Get/Put */
+				  /* values */
+	u64 remote_GPs_pa;	  /* phys address of remote partition's local */
+				  /* Get/Put values */
+
+
+	/* fields used to pass args when opening or closing a channel */
+
+	void *local_openclose_args_base;  /* base address of kmalloc'd space */
+	struct xpc_openclose_args *local_openclose_args;  /* local's args */
+	void *remote_openclose_args_base; /* base address of kmalloc'd space */
+	struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */
+					  /* args */
+	u64 remote_openclose_args_pa;	  /* phys addr of remote's args */
+
+
+	/* IPI sending, receiving and handling related fields */
+
+	int remote_IPI_nasid;	    /* nasid of where to send IPIs */
+	int remote_IPI_phys_cpuid;  /* phys CPU ID of where to send IPIs */
+	AMO_t *remote_IPI_amo_va;   /* address of remote IPI AMO_t structure */
+
+	AMO_t *local_IPI_amo_va;    /* address of IPI AMO_t structure */
+	u64 local_IPI_amo;	    /* IPI amo flags yet to be handled */
+	char IPI_owner[8];	    /* IPI owner's name */
+	struct timer_list dropped_IPI_timer; /* dropped IPI timer */
+
+	spinlock_t IPI_lock;	    /* IPI handler lock */
+
+
+	/* channel manager related fields */
+
+	atomic_t channel_mgr_requests;	/* #of requests to activate chan mgr */
+	wait_queue_head_t channel_mgr_wq; /* channel mgr's wait queue */
+
+} ____cacheline_aligned;
+
+
+/* struct xpc_partition act_state values (for XPC HB) */
+
+#define	XPC_P_INACTIVE		0x00	/* partition is not active */
+#define XPC_P_ACTIVATION_REQ	0x01	/* created thread to activate */
+#define XPC_P_ACTIVATING	0x02	/* activation thread started */
+#define XPC_P_ACTIVE		0x03	/* xpc_partition_up() was called */
+#define XPC_P_DEACTIVATING	0x04	/* partition deactivation initiated */
+
+
+#define XPC_DEACTIVATE_PARTITION(_p, _reason) \
+			xpc_deactivate_partition(__LINE__, (_p), (_reason))
+
+
+/* struct xpc_partition setup_state values */
+
+#define XPC_P_UNSET		0x00	/* infrastructure was never setup */
+#define XPC_P_SETUP		0x01	/* infrastructure is setup */
+#define XPC_P_WTEARDOWN		0x02	/* waiting to teardown infrastructure */
+#define XPC_P_TORNDOWN		0x03	/* infrastructure is torndown */
+
+
+/*
+ * struct xpc_partition IPI_timer #of seconds to wait before checking for
+ * dropped IPIs. These occur whenever an IPI amo write doesn't complete until
+ * after the IPI was received.
+ */
+#define XPC_P_DROPPED_IPI_WAIT	(0.25 * HZ)
+
+
+#define XPC_PARTID(_p)	((partid_t) ((_p) - &xpc_partitions[0]))
+
+
+
+/* found in xp_main.c */
+extern struct xpc_registration xpc_registrations[];
+
+
+/* >>> found in xpc_main.c only */
+extern struct device *xpc_part;
+extern struct device *xpc_chan;
+extern irqreturn_t xpc_notify_IRQ_handler(int, void *, struct pt_regs *);
+extern void xpc_dropped_IPI_check(struct xpc_partition *);
+extern void xpc_activate_kthreads(struct xpc_channel *, int);
+extern void xpc_create_kthreads(struct xpc_channel *, int);
+extern void xpc_disconnect_wait(int);
+
+
+/* found in xpc_main.c and efi-xpc.c */
+extern void xpc_activate_partition(struct xpc_partition *);
+
+
+/* found in xpc_partition.c */
+extern int xpc_exiting;
+extern int xpc_hb_interval;
+extern int xpc_hb_check_interval;
+extern struct xpc_vars *xpc_vars;
+extern struct xpc_rsvd_page *xpc_rsvd_page;
+extern struct xpc_vars_part *xpc_vars_part;
+extern struct xpc_partition xpc_partitions[XP_MAX_PARTITIONS + 1];
+extern char xpc_remote_copy_buffer[];
+extern struct xpc_rsvd_page *xpc_rsvd_page_init(void);
+extern void xpc_allow_IPI_ops(void);
+extern void xpc_restrict_IPI_ops(void);
+extern int xpc_identify_act_IRQ_sender(void);
+extern enum xpc_retval xpc_mark_partition_active(struct xpc_partition *);
+extern void xpc_mark_partition_inactive(struct xpc_partition *);
+extern void xpc_discovery(void);
+extern void xpc_check_remote_hb(void);
+extern void xpc_deactivate_partition(const int, struct xpc_partition *,
+						enum xpc_retval);
+extern enum xpc_retval xpc_initiate_partid_to_nasids(partid_t, void *);
+
+
+/* found in xpc_channel.c */
+extern void xpc_initiate_connect(int);
+extern void xpc_initiate_disconnect(int);
+extern enum xpc_retval xpc_initiate_allocate(partid_t, int, u32, void **);
+extern enum xpc_retval xpc_initiate_send(partid_t, int, void *);
+extern enum xpc_retval xpc_initiate_send_notify(partid_t, int, void *,
+						xpc_notify_func, void *);
+extern void xpc_initiate_received(partid_t, int, void *);
+extern enum xpc_retval xpc_setup_infrastructure(struct xpc_partition *);
+extern enum xpc_retval xpc_pull_remote_vars_part(struct xpc_partition *);
+extern void xpc_process_channel_activity(struct xpc_partition *);
+extern void xpc_connected_callout(struct xpc_channel *);
+extern void xpc_deliver_msg(struct xpc_channel *);
+extern void xpc_disconnect_channel(const int, struct xpc_channel *,
+					enum xpc_retval, unsigned long *);
+extern void xpc_disconnected_callout(struct xpc_channel *);
+extern void xpc_partition_down(struct xpc_partition *, enum xpc_retval);
+extern void xpc_teardown_infrastructure(struct xpc_partition *);
+
+
+
+static inline void
+xpc_wakeup_channel_mgr(struct xpc_partition *part)
+{
+	if (atomic_inc_return(&part->channel_mgr_requests) == 1) {
+		wake_up(&part->channel_mgr_wq);
+	}
+}
+
+
+
+/*
+ * These next two inlines are used to keep us from tearing down a channel's
+ * msg queues while a thread may be referencing them.
+ */
+static inline void
+xpc_msgqueue_ref(struct xpc_channel *ch)
+{
+	atomic_inc(&ch->references);
+}
+
+static inline void
+xpc_msgqueue_deref(struct xpc_channel *ch)
+{
+	s32 refs = atomic_dec_return(&ch->references);
+
+	DBUG_ON(refs < 0);
+	if (refs == 0) {
+		xpc_wakeup_channel_mgr(&xpc_partitions[ch->partid]);
+	}
+}
+
+
+
+#define XPC_DISCONNECT_CHANNEL(_ch, _reason, _irqflgs) \
+		xpc_disconnect_channel(__LINE__, _ch, _reason, _irqflgs)
+
+
+/*
+ * These two inlines are used to keep us from tearing down a partition's
+ * setup infrastructure while a thread may be referencing it.
+ */
+static inline void
+xpc_part_deref(struct xpc_partition *part)
+{
+	s32 refs = atomic_dec_return(&part->references);
+
+
+	DBUG_ON(refs < 0);
+	if (refs == 0 && part->setup_state == XPC_P_WTEARDOWN) {
+		wake_up(&part->teardown_wq);
+	}
+}
+
+static inline int
+xpc_part_ref(struct xpc_partition *part)
+{
+	int setup;
+
+
+	atomic_inc(&part->references);
+	setup = (part->setup_state == XPC_P_SETUP);
+	if (!setup) {
+		xpc_part_deref(part);
+	}
+	return setup;
+}
+
+
+
+/*
+ * The following macro is to be used for the setting of the reason and
+ * reason_line fields in both the struct xpc_channel and struct xpc_partition
+ * structures.
+ */
+#define XPC_SET_REASON(_p, _reason, _line) \
+	{ \
+		(_p)->reason = _reason; \
+		(_p)->reason_line = _line; \
+	}
+
+
+
+/*
+ * The following set of macros and inlines are used for the sending and
+ * receiving of IPIs (also known as IRQs). There are two flavors of IPIs,
+ * one that is associated with partition activity (SGI_XPC_ACTIVATE) and
+ * the other that is associated with channel activity (SGI_XPC_NOTIFY).
+ */
+
+static inline u64
+xpc_IPI_receive(AMO_t *amo)
+{
+	return FETCHOP_LOAD_OP(TO_AMO((u64) &amo->variable), FETCHOP_CLEAR);
+}
+
+
+static inline enum xpc_retval
+xpc_IPI_send(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector)
+{
+	int ret = 0;
+	unsigned long irq_flags;
+
+
+	local_irq_save(irq_flags);
+
+	FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_OR, flag);
+	sn_send_IPI_phys(nasid, phys_cpuid, vector, 0);
+
+	/*
+	 * We must always use the nofault function regardless of whether we
+	 * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
+	 * didn't, we'd never know that the other partition is down and would
+	 * keep sending IPIs and AMOs to it until the heartbeat times out.
+	 */
+	ret = xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo->variable),
+				xp_nofault_PIOR_target));
+
+	local_irq_restore(irq_flags);
+
+	return ((ret == 0) ? xpcSuccess : xpcPioReadError);
+}
+
+
+/*
+ * IPIs associated with SGI_XPC_ACTIVATE IRQ.
+ */
+
+/*
+ * Flag the appropriate AMO variable and send an IPI to the specified node.
+ */
+static inline void
+xpc_activate_IRQ_send(u64 amos_page, int from_nasid, int to_nasid,
+			int to_phys_cpuid)
+{
+	int w_index = XPC_NASID_W_INDEX(from_nasid);
+	int b_index = XPC_NASID_B_INDEX(from_nasid);
+	AMO_t *amos = (AMO_t *) __va(amos_page +
+					(XP_MAX_PARTITIONS * sizeof(AMO_t)));
+
+
+	(void) xpc_IPI_send(&amos[w_index], (1UL << b_index), to_nasid,
+				to_phys_cpuid, SGI_XPC_ACTIVATE);
+}
+
+static inline void
+xpc_IPI_send_activate(struct xpc_vars *vars)
+{
+	xpc_activate_IRQ_send(vars->amos_page_pa, cnodeid_to_nasid(0),
+				vars->act_nasid, vars->act_phys_cpuid);
+}
+
+static inline void
+xpc_IPI_send_activated(struct xpc_partition *part)
+{
+	xpc_activate_IRQ_send(part->remote_amos_page_pa, cnodeid_to_nasid(0),
+			part->remote_act_nasid, part->remote_act_phys_cpuid);
+}
+
+static inline void
+xpc_IPI_send_reactivate(struct xpc_partition *part)
+{
+	xpc_activate_IRQ_send(xpc_vars->amos_page_pa, part->reactivate_nasid,
+				xpc_vars->act_nasid, xpc_vars->act_phys_cpuid);
+}
+
+
+/*
+ * IPIs associated with SGI_XPC_NOTIFY IRQ.
+ */
+
+/*
+ * Send an IPI to the remote partition that is associated with the
+ * specified channel.
+ */
+#define XPC_NOTIFY_IRQ_SEND(_ch, _ipi_f, _irq_f) \
+		xpc_notify_IRQ_send(_ch, _ipi_f, #_ipi_f, _irq_f)
+
+static inline void
+xpc_notify_IRQ_send(struct xpc_channel *ch, u8 ipi_flag, char *ipi_flag_string,
+			unsigned long *irq_flags)
+{
+	struct xpc_partition *part = &xpc_partitions[ch->partid];
+	enum xpc_retval ret;
+
+
+	if (likely(part->act_state != XPC_P_DEACTIVATING)) {
+		ret = xpc_IPI_send(part->remote_IPI_amo_va,
+					(u64) ipi_flag << (ch->number * 8),
+					part->remote_IPI_nasid,
+					part->remote_IPI_phys_cpuid,
+					SGI_XPC_NOTIFY);
+		dev_dbg(xpc_chan, "%s sent to partid=%d, channel=%d, ret=%d\n",
+			ipi_flag_string, ch->partid, ch->number, ret);
+		if (unlikely(ret != xpcSuccess)) {
+			if (irq_flags != NULL) {
+				spin_unlock_irqrestore(&ch->lock, *irq_flags);
+			}
+			XPC_DEACTIVATE_PARTITION(part, ret);
+			if (irq_flags != NULL) {
+				spin_lock_irqsave(&ch->lock, *irq_flags);
+			}
+		}
+	}
+}
+
+
+/*
+ * Make it look like the remote partition, which is associated with the
+ * specified channel, sent us an IPI. This faked IPI will be handled
+ * by xpc_dropped_IPI_check().
+ */
+#define XPC_NOTIFY_IRQ_SEND_LOCAL(_ch, _ipi_f) \
+		xpc_notify_IRQ_send_local(_ch, _ipi_f, #_ipi_f)
+
+static inline void
+xpc_notify_IRQ_send_local(struct xpc_channel *ch, u8 ipi_flag,
+				char *ipi_flag_string)
+{
+	struct xpc_partition *part = &xpc_partitions[ch->partid];
+
+
+	FETCHOP_STORE_OP(TO_AMO((u64) &part->local_IPI_amo_va->variable),
+			FETCHOP_OR, ((u64) ipi_flag << (ch->number * 8)));
+	dev_dbg(xpc_chan, "%s sent local from partid=%d, channel=%d\n",
+		ipi_flag_string, ch->partid, ch->number);
+}
+
+
+/*
+ * The sending and receiving of IPIs includes the setting of an AMO variable
+ * to indicate the reason the IPI was sent. The 64-bit variable is divided
+ * up into eight bytes, ordered from right to left. Byte zero pertains to
+ * channel 0, byte one to channel 1, and so on. Each byte is described by
+ * the following IPI flags.
+ */
+
+#define	XPC_IPI_CLOSEREQUEST	0x01
+#define	XPC_IPI_CLOSEREPLY	0x02
+#define	XPC_IPI_OPENREQUEST	0x04
+#define	XPC_IPI_OPENREPLY	0x08
+#define	XPC_IPI_MSGREQUEST	0x10
+
+
+/* given an AMO variable and a channel#, get its associated IPI flags */
+#define XPC_GET_IPI_FLAGS(_amo, _c)	((u8) (((_amo) >> ((_c) * 8)) & 0xff))
+
+#define	XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(_amo) ((_amo) & 0x0f0f0f0f0f0f0f0f)
+#define XPC_ANY_MSG_IPI_FLAGS_SET(_amo)       ((_amo) & 0x1010101010101010)
+
+
+static inline void
+xpc_IPI_send_closerequest(struct xpc_channel *ch, unsigned long *irq_flags)
+{
+	struct xpc_openclose_args *args = ch->local_openclose_args;
+
+
+	args->reason = ch->reason;
+
+	XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_CLOSEREQUEST, irq_flags);
+}
+
+static inline void
+xpc_IPI_send_closereply(struct xpc_channel *ch, unsigned long *irq_flags)
+{
+	XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_CLOSEREPLY, irq_flags);
+}
+
+static inline void
+xpc_IPI_send_openrequest(struct xpc_channel *ch, unsigned long *irq_flags)
+{
+	struct xpc_openclose_args *args = ch->local_openclose_args;
+
+
+	args->msg_size = ch->msg_size;
+	args->local_nentries = ch->local_nentries;
+
+	XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_OPENREQUEST, irq_flags);
+}
+
+static inline void
+xpc_IPI_send_openreply(struct xpc_channel *ch, unsigned long *irq_flags)
+{
+	struct xpc_openclose_args *args = ch->local_openclose_args;
+
+
+	args->remote_nentries = ch->remote_nentries;
+	args->local_nentries = ch->local_nentries;
+	args->local_msgqueue_pa = __pa(ch->local_msgqueue);
+
+	XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_OPENREPLY, irq_flags);
+}
+
+static inline void
+xpc_IPI_send_msgrequest(struct xpc_channel *ch)
+{
+	XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_MSGREQUEST, NULL);
+}
+
+static inline void
+xpc_IPI_send_local_msgrequest(struct xpc_channel *ch)
+{
+	XPC_NOTIFY_IRQ_SEND_LOCAL(ch, XPC_IPI_MSGREQUEST);
+}
+
+
+/*
+ * Memory for XPC's AMO variables is allocated by the MSPEC driver. These
+ * pages are located in the lowest granule. The lowest granule uses 4k pages
+ * for cached references and an alternate TLB handler to never provide a
+ * cacheable mapping for the entire region. This will prevent speculative
+ * reading of cached copies of our lines from being issued which will cause
+ * a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64
+ * (XP_MAX_PARTITIONS) AMO variables for message notification (xpc_main.c)
+ * and an additional 16 AMO variables for partition activation (xpc_hb.c).
+ */
+static inline AMO_t *
+xpc_IPI_init(partid_t partid)
+{
+	AMO_t *part_amo = xpc_vars->amos_page + partid;
+
+
+	xpc_IPI_receive(part_amo);
+	return part_amo;
+}
+
+
+
+static inline enum xpc_retval
+xpc_map_bte_errors(bte_result_t error)
+{
+	switch (error) {
+	case BTE_SUCCESS:	return xpcSuccess;
+	case BTEFAIL_DIR:	return xpcBteDirectoryError;
+	case BTEFAIL_POISON:	return xpcBtePoisonError;
+	case BTEFAIL_WERR:	return xpcBteWriteError;
+	case BTEFAIL_ACCESS:	return xpcBteAccessError;
+	case BTEFAIL_PWERR:	return xpcBtePWriteError;
+	case BTEFAIL_PRERR:	return xpcBtePReadError;
+	case BTEFAIL_TOUT:	return xpcBteTimeOutError;
+	case BTEFAIL_XTERR:	return xpcBteXtalkError;
+	case BTEFAIL_NOTAVAIL:	return xpcBteNotAvailable;
+	default:		return xpcBteUnmappedError;
+	}
+}
+
+
+
+static inline void *
+xpc_kmalloc_cacheline_aligned(size_t size, int flags, void **base)
+{
+	/* see if kmalloc will give us cachline aligned memory by default */
+	*base = kmalloc(size, flags);
+	if (*base == NULL) {
+		return NULL;
+	}
+	if ((u64) *base == L1_CACHE_ALIGN((u64) *base)) {
+		return *base;
+	}
+	kfree(*base);
+
+	/* nope, we'll have to do it ourselves */
+	*base = kmalloc(size + L1_CACHE_BYTES, flags);
+	if (*base == NULL) {
+		return NULL;
+	}
+	return (void *) L1_CACHE_ALIGN((u64) *base);
+}
+
+
+/*
+ * Check to see if there is any channel activity to/from the specified
+ * partition.
+ */
+static inline void
+xpc_check_for_channel_activity(struct xpc_partition *part)
+{
+	u64 IPI_amo;
+	unsigned long irq_flags;
+
+
+	IPI_amo = xpc_IPI_receive(part->local_IPI_amo_va);
+	if (IPI_amo == 0) {
+		return;
+	}
+
+	spin_lock_irqsave(&part->IPI_lock, irq_flags);
+	part->local_IPI_amo |= IPI_amo;
+	spin_unlock_irqrestore(&part->IPI_lock, irq_flags);
+
+	dev_dbg(xpc_chan, "received IPI from partid=%d, IPI_amo=0x%lx\n",
+		XPC_PARTID(part), IPI_amo);
+
+	xpc_wakeup_channel_mgr(part);
+}
+
+
+#endif /* _IA64_SN_KERNEL_XPC_H */
+

arch/ia64/sn/kernel/xpc_channel.c

···
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2004-2005 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+
+
+/*
+ * Cross Partition Communication (XPC) channel support.
+ *
+ *	This is the part of XPC that manages the channels and
+ *	sends/receives messages across them to/from other partitions.
+ *
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/cache.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <asm/sn/bte.h>
+#include <asm/sn/sn_sal.h>
+#include "xpc.h"
+
+
+/*
+ * Set up the initial values for the XPartition Communication channels.
+ */
+static void
+xpc_initialize_channels(struct xpc_partition *part, partid_t partid)
+{
+	int ch_number;
+	struct xpc_channel *ch;
+
+
+	for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
+		ch = &part->channels[ch_number];
+
+		ch->partid = partid;
+		ch->number = ch_number;
+		ch->flags = XPC_C_DISCONNECTED;
+
+		ch->local_GP = &part->local_GPs[ch_number];
+		ch->local_openclose_args =
+					&part->local_openclose_args[ch_number];
+
+		atomic_set(&ch->kthreads_assigned, 0);
+		atomic_set(&ch->kthreads_idle, 0);
+		atomic_set(&ch->kthreads_active, 0);
+
+		atomic_set(&ch->references, 0);
+		atomic_set(&ch->n_to_notify, 0);
+
+		spin_lock_init(&ch->lock);
+		sema_init(&ch->msg_to_pull_sema, 1);	/* mutex */
+
+		atomic_set(&ch->n_on_msg_allocate_wq, 0);
+		init_waitqueue_head(&ch->msg_allocate_wq);
+		init_waitqueue_head(&ch->idle_wq);
+	}
+}
+
+
+/*
+ * Setup the infrastructure necessary to support XPartition Communication
+ * between the specified remote partition and the local one.
+ */
+enum xpc_retval
+xpc_setup_infrastructure(struct xpc_partition *part)
+{
+	int ret;
+	struct timer_list *timer;
+	partid_t partid = XPC_PARTID(part);
+
+
+	/*
+	 * Zero out MOST of the entry for this partition. Only the fields
+	 * starting with `nchannels' will be zeroed. The preceding fields must
+	 * remain `viable' across partition ups and downs, since they may be
+	 * referenced during this memset() operation.
+	 */
+	memset(&part->nchannels, 0, sizeof(struct xpc_partition) -
+				offsetof(struct xpc_partition, nchannels));
+
+	/*
+	 * Allocate all of the channel structures as a contiguous chunk of
+	 * memory.
+	 */
+	part->channels = kmalloc(sizeof(struct xpc_channel) * XPC_NCHANNELS,
+								GFP_KERNEL);
+	if (part->channels == NULL) {
+		dev_err(xpc_chan, "can't get memory for channels\n");
+		return xpcNoMemory;
+	}
+	memset(part->channels, 0, sizeof(struct xpc_channel) * XPC_NCHANNELS);
+
+	part->nchannels = XPC_NCHANNELS;
+
+
+	/* allocate all the required GET/PUT values */
+
+	part->local_GPs = xpc_kmalloc_cacheline_aligned(XPC_GP_SIZE,
+					GFP_KERNEL, &part->local_GPs_base);
+	if (part->local_GPs == NULL) {
+		kfree(part->channels);
+		part->channels = NULL;
+		dev_err(xpc_chan, "can't get memory for local get/put "
+			"values\n");
+		return xpcNoMemory;
+	}
+	memset(part->local_GPs, 0, XPC_GP_SIZE);
+
+	part->remote_GPs = xpc_kmalloc_cacheline_aligned(XPC_GP_SIZE,
+					GFP_KERNEL, &part->remote_GPs_base);
+	if (part->remote_GPs == NULL) {
+		kfree(part->channels);
+		part->channels = NULL;
+		kfree(part->local_GPs_base);
+		part->local_GPs = NULL;
+		dev_err(xpc_chan, "can't get memory for remote get/put "
+			"values\n");
+		return xpcNoMemory;
+	}
+	memset(part->remote_GPs, 0, XPC_GP_SIZE);
+
+
+	/* allocate all the required open and close args */
+
+	part->local_openclose_args = xpc_kmalloc_cacheline_aligned(
+					XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
+					&part->local_openclose_args_base);
+	if (part->local_openclose_args == NULL) {
+		kfree(part->channels);
+		part->channels = NULL;
+		kfree(part->local_GPs_base);
+		part->local_GPs = NULL;
+		kfree(part->remote_GPs_base);
+		part->remote_GPs = NULL;
+		dev_err(xpc_chan, "can't get memory for local connect args\n");
+		return xpcNoMemory;
+	}
+	memset(part->local_openclose_args, 0, XPC_OPENCLOSE_ARGS_SIZE);
+
+	part->remote_openclose_args = xpc_kmalloc_cacheline_aligned(
+					XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
+					&part->remote_openclose_args_base);
+	if (part->remote_openclose_args == NULL) {
+		kfree(part->channels);
+		part->channels = NULL;
+		kfree(part->local_GPs_base);
+		part->local_GPs = NULL;
+		kfree(part->remote_GPs_base);
+		part->remote_GPs = NULL;
+		kfree(part->local_openclose_args_base);
+		part->local_openclose_args = NULL;
+		dev_err(xpc_chan, "can't get memory for remote connect args\n");
+		return xpcNoMemory;
+	}
+	memset(part->remote_openclose_args, 0, XPC_OPENCLOSE_ARGS_SIZE);
+
+
+	xpc_initialize_channels(part, partid);
+
+	atomic_set(&part->nchannels_active, 0);
+
+
+	/* local_IPI_amo were set to 0 by an earlier memset() */
+
+	/* Initialize this partitions AMO_t structure */
+	part->local_IPI_amo_va = xpc_IPI_init(partid);
+
+	spin_lock_init(&part->IPI_lock);
+
+	atomic_set(&part->channel_mgr_requests, 1);
+	init_waitqueue_head(&part->channel_mgr_wq);
+
+	sprintf(part->IPI_owner, "xpc%02d", partid);
+	ret = request_irq(SGI_XPC_NOTIFY, xpc_notify_IRQ_handler, SA_SHIRQ,
+				part->IPI_owner, (void *) (u64) partid);
+	if (ret != 0) {
+		kfree(part->channels);
+		part->channels = NULL;
+		kfree(part->local_GPs_base);
+		part->local_GPs = NULL;
+		kfree(part->remote_GPs_base);
+		part->remote_GPs = NULL;
+		kfree(part->local_openclose_args_base);
+		part->local_openclose_args = NULL;
+		kfree(part->remote_openclose_args_base);
+		part->remote_openclose_args = NULL;
+		dev_err(xpc_chan, "can't register NOTIFY IRQ handler, "
+			"errno=%d\n", -ret);
+		return xpcLackOfResources;
+	}
+
+	/* Setup a timer to check for dropped IPIs */
+	timer = &part->dropped_IPI_timer;
+	init_timer(timer);
+	timer->function = (void (*)(unsigned long)) xpc_dropped_IPI_check;
+	timer->data = (unsigned long) part;
+	timer->expires = jiffies + XPC_P_DROPPED_IPI_WAIT;
+	add_timer(timer);
+
+	/*
+	 * With the setting of the partition setup_state to XPC_P_SETUP, we're
+	 * declaring that this partition is ready to go.
+	 */
+	(volatile u8) part->setup_state = XPC_P_SETUP;
+
+
+	/*
+	 * Setup the per partition specific variables required by the
+	 * remote partition to establish channel connections with us.
+	 *
+	 * The setting of the magic # indicates that these per partition
+	 * specific variables are ready to be used.
+	 */
+	xpc_vars_part[partid].GPs_pa = __pa(part->local_GPs);
+	xpc_vars_part[partid].openclose_args_pa =
+					__pa(part->local_openclose_args);
+	xpc_vars_part[partid].IPI_amo_pa = __pa(part->local_IPI_amo_va);
+	xpc_vars_part[partid].IPI_nasid = cpuid_to_nasid(smp_processor_id());
+	xpc_vars_part[partid].IPI_phys_cpuid =
+					cpu_physical_id(smp_processor_id());
+	xpc_vars_part[partid].nchannels = part->nchannels;
+	(volatile u64) xpc_vars_part[partid].magic = XPC_VP_MAGIC1;
+
+	return xpcSuccess;
+}
+
+
+/*
+ * Create a wrapper that hides the underlying mechanism for pulling a cacheline
+ * (or multiple cachelines) from a remote partition.
+ *
+ * src must be a cacheline aligned physical address on the remote partition.
+ * dst must be a cacheline aligned virtual address on this partition.
+ * cnt must be an cacheline sized
+ */
+static enum xpc_retval
+xpc_pull_remote_cachelines(struct xpc_partition *part, void *dst,
+				const void *src, size_t cnt)
+{
+	bte_result_t bte_ret;
+
+
+	DBUG_ON((u64) src != L1_CACHE_ALIGN((u64) src));
+	DBUG_ON((u64) dst != L1_CACHE_ALIGN((u64) dst));
+	DBUG_ON(cnt != L1_CACHE_ALIGN(cnt));
+
+	if (part->act_state == XPC_P_DEACTIVATING) {
+		return part->reason;
+	}
+
+	bte_ret = xp_bte_copy((u64) src, (u64) ia64_tpa((u64) dst),
+				(u64) cnt, (BTE_NORMAL | BTE_WACQUIRE), NULL);
+	if (bte_ret == BTE_SUCCESS) {
+		return xpcSuccess;
+	}
+
+	dev_dbg(xpc_chan, "xp_bte_copy() from partition %d failed, ret=%d\n",
+		XPC_PARTID(part), bte_ret);
+
+	return xpc_map_bte_errors(bte_ret);
+}
+
+
+/*
+ * Pull the remote per partititon specific variables from the specified
+ * partition.
+ */
+enum xpc_retval
+xpc_pull_remote_vars_part(struct xpc_partition *part)
+{
+	u8 buffer[L1_CACHE_BYTES * 2];
+	struct xpc_vars_part *pulled_entry_cacheline =
+			(struct xpc_vars_part *) L1_CACHE_ALIGN((u64) buffer);
+	struct xpc_vars_part *pulled_entry;
+	u64 remote_entry_cacheline_pa, remote_entry_pa;
+	partid_t partid = XPC_PARTID(part);
+	enum xpc_retval ret;
+
+
+	/* pull the cacheline that contains the variables we're interested in */
+
+	DBUG_ON(part->remote_vars_part_pa !=
+				L1_CACHE_ALIGN(part->remote_vars_part_pa));
+	DBUG_ON(sizeof(struct xpc_vars_part) != L1_CACHE_BYTES / 2);
+
+	remote_entry_pa = part->remote_vars_part_pa +
+			sn_partition_id * sizeof(struct xpc_vars_part);
+
+	remote_entry_cacheline_pa = (remote_entry_pa & ~(L1_CACHE_BYTES - 1));
+
+	pulled_entry = (struct xpc_vars_part *) ((u64) pulled_entry_cacheline +
+				(remote_entry_pa & (L1_CACHE_BYTES - 1)));
+
+	ret = xpc_pull_remote_cachelines(part, pulled_entry_cacheline,
+					(void *) remote_entry_cacheline_pa,
+					L1_CACHE_BYTES);
+	if (ret != xpcSuccess) {
+		dev_dbg(xpc_chan, "failed to pull XPC vars_part from "
+			"partition %d, ret=%d\n", partid, ret);
+		return ret;
+	}
+
+
+	/* see if they've been set up yet */
+
+	if (pulled_entry->magic != XPC_VP_MAGIC1 &&
+				pulled_entry->magic != XPC_VP_MAGIC2) {
+
+		if (pulled_entry->magic != 0) {
+			dev_dbg(xpc_chan, "partition %d's XPC vars_part for "
+				"partition %d has bad magic value (=0x%lx)\n",
+				partid, sn_partition_id, pulled_entry->magic);
+			return xpcBadMagic;
+		}
+
+		/* they've not been initialized yet */
+		return xpcRetry;
+	}
+
+	if (xpc_vars_part[partid].magic == XPC_VP_MAGIC1) {
+
+		/* validate the variables */
+
+		if (pulled_entry->GPs_pa == 0 ||
+				pulled_entry->openclose_args_pa == 0 ||
+					pulled_entry->IPI_amo_pa == 0) {
+
+			dev_err(xpc_chan, "partition %d's XPC vars_part for "
+				"partition %d are not valid\n", partid,
+				sn_partition_id);
+			return xpcInvalidAddress;
+		}
+
+		/* the variables we imported look to be valid */
+
+		part->remote_GPs_pa = pulled_entry->GPs_pa;
+		part->remote_openclose_args_pa =
+					pulled_entry->openclose_args_pa;
+		part->remote_IPI_amo_va =
+				      (AMO_t *) __va(pulled_entry->IPI_amo_pa);
+		part->remote_IPI_nasid = pulled_entry->IPI_nasid;
+		part->remote_IPI_phys_cpuid = pulled_entry->IPI_phys_cpuid;
+
+		if (part->nchannels > pulled_entry->nchannels) {
+			part->nchannels = pulled_entry->nchannels;
+		}
+
+		/* let the other side know that we've pulled their variables */
+
+		(volatile u64) xpc_vars_part[partid].magic = XPC_VP_MAGIC2;
+	}
+
+	if (pulled_entry->magic == XPC_VP_MAGIC1) {
+		return xpcRetry;
+	}
+
+	return xpcSuccess;
+}
+
+
+/*
+ * Get the IPI flags and pull the openclose args and/or remote GPs as needed.
+ */
+static u64
+xpc_get_IPI_flags(struct xpc_partition *part)
+{
+	unsigned long irq_flags;
+	u64 IPI_amo;
+	enum xpc_retval ret;
+
+
+	/*
+	 * See if there are any IPI flags to be handled.
+	 */
+
+	spin_lock_irqsave(&part->IPI_lock, irq_flags);
+	if ((IPI_amo = part->local_IPI_amo) != 0) {
+		part->local_IPI_amo = 0;
+	}
+	spin_unlock_irqrestore(&part->IPI_lock, irq_flags);
+
+
+	if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_amo)) {
+		ret = xpc_pull_remote_cachelines(part,
+					part->remote_openclose_args,
+					(void *) part->remote_openclose_args_pa,
+					XPC_OPENCLOSE_ARGS_SIZE);
+		if (ret != xpcSuccess) {
+			XPC_DEACTIVATE_PARTITION(part, ret);
+
+			dev_dbg(xpc_chan, "failed to pull openclose args from "
+				"partition %d, ret=%d\n", XPC_PARTID(part),
+				ret);
+
+			/* don't bother processing IPIs anymore */
+			IPI_amo = 0;
+		}
+	}
+
+	if (XPC_ANY_MSG_IPI_FLAGS_SET(IPI_amo)) {
+		ret = xpc_pull_remote_cachelines(part, part->remote_GPs,
+						(void *) part->remote_GPs_pa,
+						XPC_GP_SIZE);
+		if (ret != xpcSuccess) {
+			XPC_DEACTIVATE_PARTITION(part, ret);
+
+			dev_dbg(xpc_chan, "failed to pull GPs from partition "
+				"%d, ret=%d\n", XPC_PARTID(part), ret);
+
+			/* don't bother processing IPIs anymore */
+			IPI_amo = 0;
+		}
+	}
+
+	return IPI_amo;
+}
+
+
+/*
+ * Allocate the local message queue and the notify queue.
+ */
+static enum xpc_retval
+xpc_allocate_local_msgqueue(struct xpc_channel *ch)
+{
+	unsigned long irq_flags;
+	int nentries;
+	size_t nbytes;
+
+
+	// >>> may want to check for ch->flags & XPC_C_DISCONNECTING between
+	// >>> iterations of the for-loop, bail if set?
+
+	// >>> should we impose a minumum #of entries? like 4 or 8?
+	for (nentries = ch->local_nentries; nentries > 0; nentries--) {
+
+		nbytes = nentries * ch->msg_size;
+		ch->local_msgqueue = xpc_kmalloc_cacheline_aligned(nbytes,
+						(GFP_KERNEL | GFP_DMA),
+						&ch->local_msgqueue_base);
+		if (ch->local_msgqueue == NULL) {
+			continue;
+		}
+		memset(ch->local_msgqueue, 0, nbytes);
+
+		nbytes = nentries * sizeof(struct xpc_notify);
+		ch->notify_queue = kmalloc(nbytes, (GFP_KERNEL | GFP_DMA));
+		if (ch->notify_queue == NULL) {
+			kfree(ch->local_msgqueue_base);
+			ch->local_msgqueue = NULL;
+			continue;
+		}
+		memset(ch->notify_queue, 0, nbytes);
+
+		spin_lock_irqsave(&ch->lock, irq_flags);
+		if (nentries < ch->local_nentries) {
+			dev_dbg(xpc_chan, "nentries=%d local_nentries=%d, "
+				"partid=%d, channel=%d\n", nentries,
+				ch->local_nentries, ch->partid, ch->number);
+
+			ch->local_nentries = nentries;
+		}
+		spin_unlock_irqrestore(&ch->lock, irq_flags);
+		return xpcSuccess;
+	}
+
+	dev_dbg(xpc_chan, "can't get memory for local message queue and notify "
+		"queue, partid=%d, channel=%d\n", ch->partid, ch->number);
+	return xpcNoMemory;
+}
+
+
+/*
+ * Allocate the cached remote message queue.
+ */
+static enum xpc_retval
+xpc_allocate_remote_msgqueue(struct xpc_channel *ch)
+{
+	unsigned long irq_flags;
+	int nentries;
+	size_t nbytes;
+
+
+	DBUG_ON(ch->remote_nentries <= 0);
+
+	// >>> may want to check for ch->flags & XPC_C_DISCONNECTING between
+	// >>> iterations of the for-loop, bail if set?
+
+	// >>> should we impose a minumum #of entries? like 4 or 8?
+	for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
+
+		nbytes = nentries * ch->msg_size;
+		ch->remote_msgqueue = xpc_kmalloc_cacheline_aligned(nbytes,
+						(GFP_KERNEL | GFP_DMA),
+						&ch->remote_msgqueue_base);
+		if (ch->remote_msgqueue == NULL) {
+			continue;
+		}
+		memset(ch->remote_msgqueue, 0, nbytes);
+
+		spin_lock_irqsave(&ch->lock, irq_flags);
+		if (nentries < ch->remote_nentries) {
+			dev_dbg(xpc_chan, "nentries=%d remote_nentries=%d, "
+				"partid=%d, channel=%d\n", nentries,
+				ch->remote_nentries, ch->partid, ch->number);
+
+			ch->remote_nentries = nentries;
+		}
+		spin_unlock_irqrestore(&ch->lock, irq_flags);
+		return xpcSuccess;
+	}
+
+	dev_dbg(xpc_chan, "can't get memory for cached remote message queue, "
+		"partid=%d, channel=%d\n", ch->partid, ch->number);
+	return xpcNoMemory;
+}
+
+
+/*
+ * Allocate message queues and other stuff associated with a channel.
+ *
+ * Note: Assumes all of the channel sizes are filled in.
+ */
+static enum xpc_retval
+xpc_allocate_msgqueues(struct xpc_channel *ch)
+{
+	unsigned long irq_flags;
+	int i;
+	enum xpc_retval ret;
+
+
+	DBUG_ON(ch->flags & XPC_C_SETUP);
+
+	if ((ret = xpc_allocate_local_msgqueue(ch)) != xpcSuccess) {
+		return ret;
+	}
+
+	if ((ret = xpc_allocate_remote_msgqueue(ch)) != xpcSuccess) {
+		kfree(ch->local_msgqueue_base);
+		ch->local_msgqueue = NULL;
+		kfree(ch->notify_queue);
+		ch->notify_queue = NULL;
+		return ret;
+	}
+
+	for (i = 0; i < ch->local_nentries; i++) {
+		/* use a semaphore as an event wait queue */
+		sema_init(&ch->notify_queue[i].sema, 0);
+	}
+
+	sema_init(&ch->teardown_sema, 0);	/* event wait */
+
+	spin_lock_irqsave(&ch->lock, irq_flags);
+	ch->flags |= XPC_C_SETUP;
+	spin_unlock_irqrestore(&ch->lock, irq_flags);
+
+	return xpcSuccess;
+}
+
+
+/*
+ * Process a connect message from a remote partition.
+ *
+ * Note: xpc_process_connect() is expecting to be called with the
+ * spin_lock_irqsave held and will leave it locked upon return.
+ */
+static void
+xpc_process_connect(struct xpc_channel *ch, unsigned long *irq_flags)
+{
+	enum xpc_retval ret;
+
+
+	DBUG_ON(!spin_is_locked(&ch->lock));
+
+	if (!(ch->flags & XPC_C_OPENREQUEST) ||
+				!(ch->flags & XPC_C_ROPENREQUEST)) {
+		/* nothing more to do for now */
+		return;
+	}
+	DBUG_ON(!(ch->flags & XPC_C_CONNECTING));
+
+	if (!(ch->flags & XPC_C_SETUP)) {
+		spin_unlock_irqrestore(&ch->lock, *irq_flags);
+		ret = xpc_allocate_msgqueues(ch);
+		spin_lock_irqsave(&ch->lock, *irq_flags);
+
+		if (ret != xpcSuccess) {
+			XPC_DISCONNECT_CHANNEL(ch, ret, irq_flags);
+		}
+		if (ch->flags & (XPC_C_CONNECTED | XPC_C_DISCONNECTING)) {
+			return;
+		}
+
+		DBUG_ON(!(ch->flags & XPC_C_SETUP));
+		DBUG_ON(ch->local_msgqueue == NULL);
+		DBUG_ON(ch->remote_msgqueue == NULL);
+	}
+
+	if (!(ch->flags & XPC_C_OPENREPLY)) {
+		ch->flags |= XPC_C_OPENREPLY;
+		xpc_IPI_send_openreply(ch, irq_flags);
+	}
+
+	if (!(ch->flags & XPC_C_ROPENREPLY)) {
+		return;
+	}
+
+	DBUG_ON(ch->remote_msgqueue_pa == 0);
+
+	ch->flags = (XPC_C_CONNECTED | XPC_C_SETUP);	/* clear all else */
+
+	dev_info(xpc_chan, "channel %d to partition %d connected\n",
+		ch->number, ch->partid);
+
+	spin_unlock_irqrestore(&ch->lock, *irq_flags);
+	xpc_create_kthreads(ch, 1);
+	spin_lock_irqsave(&ch->lock, *irq_flags);
+}
+
+
+/*
+ * Free up message queues and other stuff that were allocated for the specified
+ * channel.
+ *
+ * Note: ch->reason and ch->reason_line are left set for debugging purposes,
+ * they're cleared when XPC_C_DISCONNECTED is cleared.
+ */
+static void
+xpc_free_msgqueues(struct xpc_channel *ch)
+{
+	DBUG_ON(!spin_is_locked(&ch->lock));
+	DBUG_ON(atomic_read(&ch->n_to_notify) != 0);
+
+	ch->remote_msgqueue_pa = 0;
+	ch->func = NULL;
+	ch->key = NULL;
+	ch->msg_size = 0;
+	ch->local_nentries = 0;
+	ch->remote_nentries = 0;
+	ch->kthreads_assigned_limit = 0;
+	ch->kthreads_idle_limit = 0;
+
+	ch->local_GP->get = 0;
+	ch->local_GP->put = 0;
+	ch->remote_GP.get = 0;
+	ch->remote_GP.put = 0;
+	ch->w_local_GP.get = 0;
+	ch->w_local_GP.put = 0;
+	ch->w_remote_GP.get = 0;
+	ch->w_remote_GP.put = 0;
+	ch->next_msg_to_pull = 0;
+
+	if (ch->flags & XPC_C_SETUP) {
+		ch->flags &= ~XPC_C_SETUP;
+
+		dev_dbg(xpc_chan, "ch->flags=0x%x, partid=%d, channel=%d\n",
+			ch->flags, ch->partid, ch->number);
+
+		kfree(ch->local_msgqueue_base);
+		ch->local_msgqueue = NULL;
+		kfree(ch->remote_msgqueue_base);
+		ch->remote_msgqueue = NULL;
+		kfree(ch->notify_queue);
+		ch->notify_queue = NULL;
+
+		/* in case someone is waiting for the teardown to complete */
+		up(&ch->teardown_sema);
+	}
+}
+
+
+/*
+ * spin_lock_irqsave() is expected to be held on entry.
+ */
+static void
+xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags)
+{
+	struct xpc_partition *part = &xpc_partitions[ch->partid];
+	u32 ch_flags = ch->flags;
+
+
+	DBUG_ON(!spin_is_locked(&ch->lock));
+
+	if (!(ch->flags & XPC_C_DISCONNECTING)) {
+		return;
+	}
+
+	DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST));
+
+	/* make sure all activity has settled down first */
+
+	if (atomic_read(&ch->references) > 0) {
+		return;
+	}
+	DBUG_ON(atomic_read(&ch->kthreads_assigned) != 0);
+
+	/* it's now safe to free the channel's message queues */
+
+	xpc_free_msgqueues(ch);
+	DBUG_ON(ch->flags & XPC_C_SETUP);
+
+	if (part->act_state != XPC_P_DEACTIVATING) {
+
+		/* as long as the other side is up do the full protocol */
+
+		if (!(ch->flags & XPC_C_RCLOSEREQUEST)) {
+			return;
+		}
+
+		if (!(ch->flags & XPC_C_CLOSEREPLY)) {
+			ch->flags |= XPC_C_CLOSEREPLY;
+			xpc_IPI_send_closereply(ch, irq_flags);
+		}
+
+		if (!(ch->flags & XPC_C_RCLOSEREPLY)) {
+			return;
+		}
+	}
+
+	/* both sides are disconnected now */
+
+	ch->flags = XPC_C_DISCONNECTED;	/* clear all flags, but this one */
+
+	atomic_dec(&part->nchannels_active);
+
+	if (ch_flags & XPC_C_WASCONNECTED) {
+		dev_info(xpc_chan, "channel %d to partition %d disconnected, "
+			"reason=%d\n", ch->number, ch->partid, ch->reason);
+	}
+}
+
+
+/*
+ * Process a change in the channel's remote connection state.
+ */
+static void
+xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
+				u8 IPI_flags)
+{
+	unsigned long irq_flags;
+	struct xpc_openclose_args *args =
+				&part->remote_openclose_args[ch_number];
+	struct xpc_channel *ch = &part->channels[ch_number];
+	enum xpc_retval reason;
+
+
+
+	spin_lock_irqsave(&ch->lock, irq_flags);
+
+
+	if (IPI_flags & XPC_IPI_CLOSEREQUEST) {
+
+		dev_dbg(xpc_chan, "XPC_IPI_CLOSEREQUEST (reason=%d) received "
+			"from partid=%d, channel=%d\n", args->reason,
+			ch->partid, ch->number);
+
+		/*
+		 * If RCLOSEREQUEST is set, we're probably waiting for
+		 * RCLOSEREPLY. We should find it and a ROPENREQUEST packed
+		 * with this RCLOSEQREUQEST in the IPI_flags.
+		 */
+
+		if (ch->flags & XPC_C_RCLOSEREQUEST) {
+			DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING));
+			DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST));
+			DBUG_ON(!(ch->flags & XPC_C_CLOSEREPLY));
+			DBUG_ON(ch->flags & XPC_C_RCLOSEREPLY);
+
+			DBUG_ON(!(IPI_flags & XPC_IPI_CLOSEREPLY));
+			IPI_flags &= ~XPC_IPI_CLOSEREPLY;
+			ch->flags |= XPC_C_RCLOSEREPLY;
+
+			/* both sides have finished disconnecting */
+			xpc_process_disconnect(ch, &irq_flags);
+		}
+
+		if (ch->flags & XPC_C_DISCONNECTED) {
+			// >>> explain this section
+
+			if (!(IPI_flags & XPC_IPI_OPENREQUEST)) {
+				DBUG_ON(part->act_state !=
+							XPC_P_DEACTIVATING);
+				spin_unlock_irqrestore(&ch->lock, irq_flags);
+				return;
+			}
+
+			XPC_SET_REASON(ch, 0, 0);
+			ch->flags &= ~XPC_C_DISCONNECTED;
+
+			atomic_inc(&part->nchannels_active);
+			ch->flags |= (XPC_C_CONNECTING | XPC_C_ROPENREQUEST);
+		}
+
+		IPI_flags &= ~(XPC_IPI_OPENREQUEST | XPC_IPI_OPENREPLY);
+
+		/*
+		 * The meaningful CLOSEREQUEST connection state fields are:
+		 *      reason = reason connection is to be closed
+		 */
+
+		ch->flags |= XPC_C_RCLOSEREQUEST;
+
+		if (!(ch->flags & XPC_C_DISCONNECTING)) {
+			reason = args->reason;
+			if (reason <= xpcSuccess || reason > xpcUnknownReason) {
+				reason = xpcUnknownReason;
+			} else if (reason == xpcUnregistering) {
+				reason = xpcOtherUnregistering;
+			}
+
+			XPC_DISCONNECT_CHANNEL(ch, reason, &irq_flags);
+		} else {
+			xpc_process_disconnect(ch, &irq_flags);
+		}
+	}
+
+
+	if (IPI_flags & XPC_IPI_CLOSEREPLY) {
+
+		dev_dbg(xpc_chan, "XPC_IPI_CLOSEREPLY received from partid=%d,"
+			" channel=%d\n", ch->partid, ch->number);
+
+		if (ch->flags & XPC_C_DISCONNECTED) {
+			DBUG_ON(part->act_state != XPC_P_DEACTIVATING);
+			spin_unlock_irqrestore(&ch->lock, irq_flags);
+			return;
+		}
+
+		DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST));
+		DBUG_ON(!(ch->flags & XPC_C_RCLOSEREQUEST));
+
+		ch->flags |= XPC_C_RCLOSEREPLY;
+
+		if (ch->flags & XPC_C_CLOSEREPLY) {
+			/* both sides have finished disconnecting */
+			xpc_process_disconnect(ch, &irq_flags);
+		}
+	}
+
+
+	if (IPI_flags & XPC_IPI_OPENREQUEST) {
+
+		dev_dbg(xpc_chan, "XPC_IPI_OPENREQUEST (msg_size=%d, "
+			"local_nentries=%d) received from partid=%d, "
+			"channel=%d\n", args->msg_size, args->local_nentries,
+			ch->partid, ch->number);
+
+		if ((ch->flags & XPC_C_DISCONNECTING) ||
+					part->act_state == XPC_P_DEACTIVATING) {
+			spin_unlock_irqrestore(&ch->lock, irq_flags);
+			return;
+		}
+		DBUG_ON(!(ch->flags & (XPC_C_DISCONNECTED |
+							XPC_C_OPENREQUEST)));
+		DBUG_ON(ch->flags & (XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
+					XPC_C_OPENREPLY | XPC_C_CONNECTED));
+
+		/*
+		 * The meaningful OPENREQUEST connection state fields are:
+		 *      msg_size = size of channel's messages in bytes
+		 *      local_nentries = remote partition's local_nentries
+		 */
+		DBUG_ON(args->msg_size == 0);
+		DBUG_ON(args->local_nentries == 0);
+
+		ch->flags |= (XPC_C_ROPENREQUEST | XPC_C_CONNECTING);
+		ch->remote_nentries = args->local_nentries;
+
+
+		if (ch->flags & XPC_C_OPENREQUEST) {
+			if (args->msg_size != ch->msg_size) {
+				XPC_DISCONNECT_CHANNEL(ch, xpcUnequalMsgSizes,
+								&irq_flags);
+				spin_unlock_irqrestore(&ch->lock, irq_flags);
+				return;
+			}
+		} else {
+			ch->msg_size = args->msg_size;
+
+			XPC_SET_REASON(ch, 0, 0);
+			ch->flags &= ~XPC_C_DISCONNECTED;
+
+			atomic_inc(&part->nchannels_active);
+		}
+
+		xpc_process_connect(ch, &irq_flags);
+	}
+
+
+	if (IPI_flags & XPC_IPI_OPENREPLY) {
+
+		dev_dbg(xpc_chan, "XPC_IPI_OPENREPLY (local_msgqueue_pa=0x%lx, "
+			"local_nentries=%d, remote_nentries=%d) received from "
+			"partid=%d, channel=%d\n", args->local_msgqueue_pa,
+			args->local_nentries, args->remote_nentries,
+			ch->partid, ch->number);
+
+		if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED)) {
+			spin_unlock_irqrestore(&ch->lock, irq_flags);
+			return;
+		}
+		DBUG_ON(!(ch->flags & XPC_C_OPENREQUEST));
+		DBUG_ON(!(ch->flags & XPC_C_ROPENREQUEST));
+		DBUG_ON(ch->flags & XPC_C_CONNECTED);
+
+		/*
+		 * The meaningful OPENREPLY connection state fields are:
+		 *      local_msgqueue_pa = physical address of remote
+		 *			    partition's local_msgqueue
+		 *      local_nentries = remote partition's local_nentries
+		 *      remote_nentries = remote partition's remote_nentries
+		 */
+		DBUG_ON(args->local_msgqueue_pa == 0);
+		DBUG_ON(args->local_nentries == 0);
+		DBUG_ON(args->remote_nentries == 0);
+
+		ch->flags |= XPC_C_ROPENREPLY;
+		ch->remote_msgqueue_pa = args->local_msgqueue_pa;
+
+		if (args->local_nentries < ch->remote_nentries) {
+			dev_dbg(xpc_chan, "XPC_IPI_OPENREPLY: new "
+				"remote_nentries=%d, old remote_nentries=%d, "
+				"partid=%d, channel=%d\n",
+				args->local_nentries, ch->remote_nentries,
+				ch->partid, ch->number);
+
+			ch->remote_nentries = args->local_nentries;
+		}
+		if (args->remote_nentries < ch->local_nentries) {
+			dev_dbg(xpc_chan, "XPC_IPI_OPENREPLY: new "
+				"local_nentries=%d, old local_nentries=%d, "
+				"partid=%d, channel=%d\n",
+				args->remote_nentries, ch->local_nentries,
+				ch->partid, ch->number);
+
+			ch->local_nentries = args->remote_nentries;
+		}
+
+		xpc_process_connect(ch, &irq_flags);
+	}
+
+	spin_unlock_irqrestore(&ch->lock, irq_flags);
+}
+
+
+/*
+ * Attempt to establish a channel connection to a remote partition.
+ */
+static enum xpc_retval
+xpc_connect_channel(struct xpc_channel *ch)
+{
+	unsigned long irq_flags;
+	struct xpc_registration *registration = &xpc_registrations[ch->number];
+
+
+	if (down_interruptible(&registration->sema) != 0) {
+		return xpcInterrupted;
+	}
+
+	if (!XPC_CHANNEL_REGISTERED(ch->number)) {
+		up(&registration->sema);
+		return xpcUnregistered;
+	}
+
+	spin_lock_irqsave(&ch->lock, irq_flags);
+
+	DBUG_ON(ch->flags & XPC_C_CONNECTED);
+	DBUG_ON(ch->flags & XPC_C_OPENREQUEST);
+
+	if (ch->flags & XPC_C_DISCONNECTING) {
+		spin_unlock_irqrestore(&ch->lock, irq_flags);
+		up(&registration->sema);
+		return ch->reason;
+	}
+
+
+	/* add info from the channel connect registration to the channel */
+
+	ch->kthreads_assigned_limit = registration->assigned_limit;
+	ch->kthreads_idle_limit = registration->idle_limit;
+	DBUG_ON(atomic_read(&ch->kthreads_assigned) != 0);
+	DBUG_ON(atomic_read(&ch->kthreads_idle) != 0);
+	DBUG_ON(atomic_read(&ch->kthreads_active) != 0);
+
+	ch->func = registration->func;
+	DBUG_ON(registration->func == NULL);
+	ch->key = registration->key;
+
+	ch->local_nentries = registration->nentries;
+
+	if (ch->flags & XPC_C_ROPENREQUEST) {
+		if (registration->msg_size != ch->msg_size) {
+			/* the local and remote sides aren't the same */
+
+			/*
+			 * Because XPC_DISCONNECT_CHANNEL() can block we're
+			 * forced to up the registration sema before we unlock
+			 * the channel lock. But that's okay here because we're
+			 * done with the part that required the registration
+			 * sema. XPC_DISCONNECT_CHANNEL() requires that the
+			 * channel lock be locked and will unlock and relock
+			 * the channel lock as needed.
+			 */
+			up(&registration->sema);
+			XPC_DISCONNECT_CHANNEL(ch, xpcUnequalMsgSizes,
+								&irq_flags);
+			spin_unlock_irqrestore(&ch->lock, irq_flags);
+			return xpcUnequalMsgSizes;
+		}
+	} else {
+		ch->msg_size = registration->msg_size;
+
+		XPC_SET_REASON(ch, 0, 0);
+		ch->flags &= ~XPC_C_DISCONNECTED;
+
+		atomic_inc(&xpc_partitions[ch->partid].nchannels_active);
+	}
+
+	up(&registration->sema);
+
+
+	/* initiate the connection */
+
+	ch->flags |= (XPC_C_OPENREQUEST | XPC_C_CONNECTING);
+	xpc_IPI_send_openrequest(ch, &irq_flags);
+
+	xpc_process_connect(ch, &irq_flags);
+
+	spin_unlock_irqrestore(&ch->lock, irq_flags);
+
+	return xpcSuccess;
+}
+
+
+/*
+ * Notify those who wanted to be notified upon delivery of their message.
+ */
+static void
+xpc_notify_senders(struct xpc_channel *ch, enum xpc_retval reason, s64 put)
+{
+	struct xpc_notify *notify;
+	u8 notify_type;
+	s64 get = ch->w_remote_GP.get - 1;
+
+
+	while (++get < put && atomic_read(&ch->n_to_notify) > 0) {
+
+		notify = &ch->notify_queue[get % ch->local_nentries];
+
+		/*
+		 * See if the notify entry indicates it was associated with
+		 * a message who's sender wants to be notified. It is possible
+		 * that it is, but someone else is doing or has done the
+		 * notification.
+		 */
+		notify_type = notify->type;
+		if (notify_type == 0 ||
+				cmpxchg(&notify->type, notify_type, 0) !=
+								notify_type) {
+			continue;
+		}
+
+		DBUG_ON(notify_type != XPC_N_CALL);
+
+		atomic_dec(&ch->n_to_notify);
+
+		if (notify->func != NULL) {
+			dev_dbg(xpc_chan, "notify->func() called, notify=0x%p, "
+				"msg_number=%ld, partid=%d, channel=%d\n",
+				(void *) notify, get, ch->partid, ch->number);
+
+			notify->func(reason, ch->partid, ch->number,
+								notify->key);
+
+			dev_dbg(xpc_chan, "notify->func() returned, "
+				"notify=0x%p, msg_number=%ld, partid=%d, "
+				"channel=%d\n", (void *) notify, get,
+				ch->partid, ch->number);
+		}
+	}
+}
+
+
+/*
+ * Clear some of the msg flags in the local message queue.
+ */
+static inline void
+xpc_clear_local_msgqueue_flags(struct xpc_channel *ch)
+{
+	struct xpc_msg *msg;
+	s64 get;
+
+
+	get = ch->w_remote_GP.get;
+	do {
+		msg = (struct xpc_msg *) ((u64) ch->local_msgqueue +
+				(get % ch->local_nentries) * ch->msg_size);
+		msg->flags = 0;
+	} while (++get < (volatile s64) ch->remote_GP.get);
+}
+
+
+/*
+ * Clear some of the msg flags in the remote message queue.
+ */
+static inline void
+xpc_clear_remote_msgqueue_flags(struct xpc_channel *ch)
+{
+	struct xpc_msg *msg;
+	s64 put;
+
+
+	put = ch->w_remote_GP.put;
+	do {
+		msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue +
+				(put % ch->remote_nentries) * ch->msg_size);
+		msg->flags = 0;
+	} while (++put < (volatile s64) ch->remote_GP.put);
+}
+
+
+static void
+xpc_process_msg_IPI(struct xpc_partition *part, int ch_number)
+{
+	struct xpc_channel *ch = &part->channels[ch_number];
+	int nmsgs_sent;
+
+
+	ch->remote_GP = part->remote_GPs[ch_number];
+
+
+	/* See what, if anything, has changed for each connected channel */
+
+	xpc_msgqueue_ref(ch);
+
+	if (ch->w_remote_GP.get == ch->remote_GP.get &&
+				ch->w_remote_GP.put == ch->remote_GP.put) {
+		/* nothing changed since GPs were last pulled */
+		xpc_msgqueue_deref(ch);
+		return;
+	}
+
+	if (!(ch->flags & XPC_C_CONNECTED)){
+		xpc_msgqueue_deref(ch);
+		return;
+	}
+
+
+	/*
+	 * First check to see if messages recently sent by us have been
+	 * received by the other side. (The remote GET value will have
+	 * changed since we last looked at it.)
+	 */
+
+	if (ch->w_remote_GP.get != ch->remote_GP.get) {
+
+		/*
+		 * We need to notify any senders that want to be notified
+		 * that their sent messages have been received by their
+		 * intended recipients. We need to do this before updating
+		 * w_remote_GP.get so that we don't allocate the same message
+		 * queue entries prematurely (see xpc_allocate_msg()).
+		 */
+		if (atomic_read(&ch->n_to_notify) > 0) {
+			/*
+			 * Notify senders that messages sent have been
+			 * received and delivered by the other side.
+			 */
+			xpc_notify_senders(ch, xpcMsgDelivered,
+							ch->remote_GP.get);
+		}
+
+		/*
+		 * Clear msg->flags in previously sent messages, so that
+		 * they're ready for xpc_allocate_msg().
+		 */
+		xpc_clear_local_msgqueue_flags(ch);
+
+		(volatile s64) ch->w_remote_GP.get = ch->remote_GP.get;
+
+		dev_dbg(xpc_chan, "w_remote_GP.get changed to %ld, partid=%d, "
+			"channel=%d\n", ch->w_remote_GP.get, ch->partid,
+			ch->number);
+
+		/*
+		 * If anyone was waiting for message queue entries to become
+		 * available, wake them up.
+		 */
+		if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) {
+			wake_up(&ch->msg_allocate_wq);
+		}
+	}
+
+
+	/*
+	 * Now check for newly sent messages by the other side. (The remote
+	 * PUT value will have changed since we last looked at it.)
+	 */
+
+	if (ch->w_remote_GP.put != ch->remote_GP.put) {
+		/*
+		 * Clear msg->flags in previously received messages, so that
+		 * they're ready for xpc_get_deliverable_msg().
+		 */
+		xpc_clear_remote_msgqueue_flags(ch);
+
+		(volatile s64) ch->w_remote_GP.put = ch->remote_GP.put;
+
+		dev_dbg(xpc_chan, "w_remote_GP.put changed to %ld, partid=%d, "
+			"channel=%d\n", ch->w_remote_GP.put, ch->partid,
+			ch->number);
+
+		nmsgs_sent = ch->w_remote_GP.put - ch->w_local_GP.get;
+		if (nmsgs_sent > 0) {
+			dev_dbg(xpc_chan, "msgs waiting to be copied and "
+				"delivered=%d, partid=%d, channel=%d\n",
+				nmsgs_sent, ch->partid, ch->number);
+
+			if (ch->flags & XPC_C_CONNECTCALLOUT) {
+				xpc_activate_kthreads(ch, nmsgs_sent);
+			}
+		}
+	}
+
+	xpc_msgqueue_deref(ch);
+}
+
+
+void
+xpc_process_channel_activity(struct xpc_partition *part)
+{
+	unsigned long irq_flags;
+	u64 IPI_amo, IPI_flags;
+	struct xpc_channel *ch;
+	int ch_number;
+
+
+	IPI_amo = xpc_get_IPI_flags(part);
+
+	/*
+	 * Initiate channel connections for registered channels.
+	 *
+	 * For each connected channel that has pending messages activate idle
+	 * kthreads and/or create new kthreads as needed.
+	 */
+
+	for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
+		ch = &part->channels[ch_number];
+
+
+		/*
+		 * Process any open or close related IPI flags, and then deal
+		 * with connecting or disconnecting the channel as required.
+		 */
+
+		IPI_flags = XPC_GET_IPI_FLAGS(IPI_amo, ch_number);
+
+		if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_flags)) {
+			xpc_process_openclose_IPI(part, ch_number, IPI_flags);
+		}
+
+
+		if (ch->flags & XPC_C_DISCONNECTING) {
+			spin_lock_irqsave(&ch->lock, irq_flags);
+			xpc_process_disconnect(ch, &irq_flags);
+			spin_unlock_irqrestore(&ch->lock, irq_flags);
+			continue;
+		}
+
+		if (part->act_state == XPC_P_DEACTIVATING) {
+			continue;
+		}
+
+		if (!(ch->flags & XPC_C_CONNECTED)) {
+			if (!(ch->flags & XPC_C_OPENREQUEST)) {
+				DBUG_ON(ch->flags & XPC_C_SETUP);
+				(void) xpc_connect_channel(ch);
+			} else {
+				spin_lock_irqsave(&ch->lock, irq_flags);
+				xpc_process_connect(ch, &irq_flags);
+				spin_unlock_irqrestore(&ch->lock, irq_flags);
+			}
+			continue;
+		}
+
+
+		/*
+		 * Process any message related IPI flags, this may involve the
+		 * activation of kthreads to deliver any pending messages sent
+		 * from the other partition.
+		 */
+
+		if (XPC_ANY_MSG_IPI_FLAGS_SET(IPI_flags)) {
+			xpc_process_msg_IPI(part, ch_number);
+		}
+	}
+}
+
+
+/*
+ * XPC's heartbeat code calls this function to inform XPC that a partition has
+ * gone down.  XPC responds by tearing down the XPartition Communication
+ * infrastructure used for the just downed partition.
+ *
+ * XPC's heartbeat code will never call this function and xpc_partition_up()
+ * at the same time. Nor will it ever make multiple calls to either function
+ * at the same time.
+ */
+void
+xpc_partition_down(struct xpc_partition *part, enum xpc_retval reason)
+{
+	unsigned long irq_flags;
+	int ch_number;
+	struct xpc_channel *ch;
+
+
+	dev_dbg(xpc_chan, "deactivating partition %d, reason=%d\n",
+		XPC_PARTID(part), reason);
+
+	if (!xpc_part_ref(part)) {
+		/* infrastructure for this partition isn't currently set up */
+		return;
+	}
+
+
+	/* disconnect all channels associated with the downed partition */
+
+	for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
+		ch = &part->channels[ch_number];
+
+
+		xpc_msgqueue_ref(ch);
+		spin_lock_irqsave(&ch->lock, irq_flags);
+
+		XPC_DISCONNECT_CHANNEL(ch, reason, &irq_flags);
+
+		spin_unlock_irqrestore(&ch->lock, irq_flags);
+		xpc_msgqueue_deref(ch);
+	}
+
+	xpc_wakeup_channel_mgr(part);
+
+	xpc_part_deref(part);
+}
+
+
+/*
+ * Teardown the infrastructure necessary to support XPartition Communication
+ * between the specified remote partition and the local one.
+ */
+void
+xpc_teardown_infrastructure(struct xpc_partition *part)
+{
+	partid_t partid = XPC_PARTID(part);
+
+
+	/*
+	 * We start off by making this partition inaccessible to local
+	 * processes by marking it as no longer setup. Then we make it
+	 * inaccessible to remote processes by clearing the XPC per partition
+	 * specific variable's magic # (which indicates that these variables
+	 * are no longer valid) and by ignoring all XPC notify IPIs sent to
+	 * this partition.
+	 */
+
+	DBUG_ON(atomic_read(&part->nchannels_active) != 0);
+	DBUG_ON(part->setup_state != XPC_P_SETUP);
+	part->setup_state = XPC_P_WTEARDOWN;
+
+	xpc_vars_part[partid].magic = 0;
+
+
+	free_irq(SGI_XPC_NOTIFY, (void *) (u64) partid);
+
+
+	/*
+	 * Before proceding with the teardown we have to wait until all
+	 * existing references cease.
+	 */
+	wait_event(part->teardown_wq, (atomic_read(&part->references) == 0));
+
+
+	/* now we can begin tearing down the infrastructure */
+
+	part->setup_state = XPC_P_TORNDOWN;
+
+	/* in case we've still got outstanding timers registered... */
+	del_timer_sync(&part->dropped_IPI_timer);
+
+	kfree(part->remote_openclose_args_base);
+	part->remote_openclose_args = NULL;
+	kfree(part->local_openclose_args_base);
+	part->local_openclose_args = NULL;
+	kfree(part->remote_GPs_base);
+	part->remote_GPs = NULL;
+	kfree(part->local_GPs_base);
+	part->local_GPs = NULL;
+	kfree(part->channels);
+	part->channels = NULL;
+	part->local_IPI_amo_va = NULL;
+}
+
+
+/*
+ * Called by XP at the time of channel connection registration to cause
+ * XPC to establish connections to all currently active partitions.
+ */
+void
+xpc_initiate_connect(int ch_number)
+{
+	partid_t partid;
+	struct xpc_partition *part;
+	struct xpc_channel *ch;
+
+
+	DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
+
+	for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+		part = &xpc_partitions[partid];
+
+		if (xpc_part_ref(part)) {
+			ch = &part->channels[ch_number];
+
+			if (!(ch->flags & XPC_C_DISCONNECTING)) {
+				DBUG_ON(ch->flags & XPC_C_OPENREQUEST);
+				DBUG_ON(ch->flags & XPC_C_CONNECTED);
+				DBUG_ON(ch->flags & XPC_C_SETUP);
+
+				/*
+				 * Initiate the establishment of a connection
+				 * on the newly registered channel to the
+				 * remote partition.
+				 */
+				xpc_wakeup_channel_mgr(part);
+			}
+
+			xpc_part_deref(part);
+		}
+	}
+}
+
+
+void
+xpc_connected_callout(struct xpc_channel *ch)
+{
+	unsigned long irq_flags;
+
+
+	/* let the registerer know that a connection has been established */
+
+	if (ch->func != NULL) {
+		dev_dbg(xpc_chan, "ch->func() called, reason=xpcConnected, "
+			"partid=%d, channel=%d\n", ch->partid, ch->number);
+
+		ch->func(xpcConnected, ch->partid, ch->number,
+				(void *) (u64) ch->local_nentries, ch->key);
+
+		dev_dbg(xpc_chan, "ch->func() returned, reason=xpcConnected, "
+			"partid=%d, channel=%d\n", ch->partid, ch->number);
+	}
+
+	spin_lock_irqsave(&ch->lock, irq_flags);
+	ch->flags |= XPC_C_CONNECTCALLOUT;
+	spin_unlock_irqrestore(&ch->lock, irq_flags);
+}
+
+
+/*
+ * Called by XP at the time of channel connection unregistration to cause
+ * XPC to teardown all current connections for the specified channel.
+ *
+ * Before returning xpc_initiate_disconnect() will wait until all connections
+ * on the specified channel have been closed/torndown. So the caller can be
+ * assured that they will not be receiving any more callouts from XPC to the
+ * function they registered via xpc_connect().
+ *
+ * Arguments:
+ *
+ *	ch_number - channel # to unregister.
+ */
+void
+xpc_initiate_disconnect(int ch_number)
+{
+	unsigned long irq_flags;
+	partid_t partid;
+	struct xpc_partition *part;
+	struct xpc_channel *ch;
+
+
+	DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
+
+	/* initiate the channel disconnect for every active partition */
+	for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+		part = &xpc_partitions[partid];
+
+		if (xpc_part_ref(part)) {
+			ch = &part->channels[ch_number];
+			xpc_msgqueue_ref(ch);
+
+			spin_lock_irqsave(&ch->lock, irq_flags);
+
+			XPC_DISCONNECT_CHANNEL(ch, xpcUnregistering,
+								&irq_flags);
+
+			spin_unlock_irqrestore(&ch->lock, irq_flags);
+
+			xpc_msgqueue_deref(ch);
+			xpc_part_deref(part);
+		}
+	}
+
+	xpc_disconnect_wait(ch_number);
+}
+
+
+/*
+ * To disconnect a channel, and reflect it back to all who may be waiting.
+ *
+ * >>> An OPEN is not allowed until XPC_C_DISCONNECTING is cleared by
+ * >>> xpc_free_msgqueues().
+ *
+ * THE CHANNEL IS TO BE LOCKED BY THE CALLER AND WILL REMAIN LOCKED UPON RETURN.
+ */
+void
+xpc_disconnect_channel(const int line, struct xpc_channel *ch,
+			enum xpc_retval reason, unsigned long *irq_flags)
+{
+	u32 flags;
+
+
+	DBUG_ON(!spin_is_locked(&ch->lock));
+
+	if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED)) {
+		return;
+	}
+	DBUG_ON(!(ch->flags & (XPC_C_CONNECTING | XPC_C_CONNECTED)));
+
+	dev_dbg(xpc_chan, "reason=%d, line=%d, partid=%d, channel=%d\n",
+		reason, line, ch->partid, ch->number);
+
+	XPC_SET_REASON(ch, reason, line);
+
+	flags = ch->flags;
+	/* some of these may not have been set */
+	ch->flags &= ~(XPC_C_OPENREQUEST | XPC_C_OPENREPLY |
+			XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
+			XPC_C_CONNECTING | XPC_C_CONNECTED);
+
+	ch->flags |= (XPC_C_CLOSEREQUEST | XPC_C_DISCONNECTING);
+	xpc_IPI_send_closerequest(ch, irq_flags);
+
+	if (flags & XPC_C_CONNECTED) {
+		ch->flags |= XPC_C_WASCONNECTED;
+	}
+
+	if (atomic_read(&ch->kthreads_idle) > 0) {
+		/* wake all idle kthreads so they can exit */
+		wake_up_all(&ch->idle_wq);
+	}
+
+	spin_unlock_irqrestore(&ch->lock, *irq_flags);
+
+
+	/* wake those waiting to allocate an entry from the local msg queue */
+
+	if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) {
+		wake_up(&ch->msg_allocate_wq);
+	}
+
+	/* wake those waiting for notify completion */
+
+	if (atomic_read(&ch->n_to_notify) > 0) {
+		xpc_notify_senders(ch, reason, ch->w_local_GP.put);
+	}
+
+	spin_lock_irqsave(&ch->lock, *irq_flags);
+}
+
+
+void
+xpc_disconnected_callout(struct xpc_channel *ch)
+{
+	/*
+	 * Let the channel's registerer know that the channel is now
+	 * disconnected. We don't want to do this if the registerer was never
+	 * informed of a connection being made, unless the disconnect was for
+	 * abnormal reasons.
+	 */
+
+	if (ch->func != NULL) {
+		dev_dbg(xpc_chan, "ch->func() called, reason=%d, partid=%d, "
+			"channel=%d\n", ch->reason, ch->partid, ch->number);
+
+		ch->func(ch->reason, ch->partid, ch->number, NULL, ch->key);
+
+		dev_dbg(xpc_chan, "ch->func() returned, reason=%d, partid=%d, "
+			"channel=%d\n", ch->reason, ch->partid, ch->number);
+	}
+}
+
+
+/*
+ * Wait for a message entry to become available for the specified channel,
+ * but don't wait any longer than 1 jiffy.
+ */
+static enum xpc_retval
+xpc_allocate_msg_wait(struct xpc_channel *ch)
+{
+	enum xpc_retval ret;
+
+
+	if (ch->flags & XPC_C_DISCONNECTING) {
+		DBUG_ON(ch->reason == xpcInterrupted);  // >>> Is this true?
+		return ch->reason;
+	}
+
+	atomic_inc(&ch->n_on_msg_allocate_wq);
+	ret = interruptible_sleep_on_timeout(&ch->msg_allocate_wq, 1);
+	atomic_dec(&ch->n_on_msg_allocate_wq);
+
+	if (ch->flags & XPC_C_DISCONNECTING) {
+		ret = ch->reason;
+		DBUG_ON(ch->reason == xpcInterrupted);  // >>> Is this true?
+	} else if (ret == 0) {
+		ret = xpcTimeout;
+	} else {
+		ret = xpcInterrupted;
+	}
+
+	return ret;
+}
+
+
+/*
+ * Allocate an entry for a message from the message queue associated with the
+ * specified channel.
+ */
+static enum xpc_retval
+xpc_allocate_msg(struct xpc_channel *ch, u32 flags,
+			struct xpc_msg **address_of_msg)
+{
+	struct xpc_msg *msg;
+	enum xpc_retval ret;
+	s64 put;
+
+
+	/* this reference will be dropped in xpc_send_msg() */
+	xpc_msgqueue_ref(ch);
+
+	if (ch->flags & XPC_C_DISCONNECTING) {
+		xpc_msgqueue_deref(ch);
+		return ch->reason;
+	}
+	if (!(ch->flags & XPC_C_CONNECTED)) {
+		xpc_msgqueue_deref(ch);
+		return xpcNotConnected;
+	}
+
+
+	/*
+	 * Get the next available message entry from the local message queue.
+	 * If none are available, we'll make sure that we grab the latest
+	 * GP values.
+	 */
+	ret = xpcTimeout;
+
+	while (1) {
+
+		put = (volatile s64) ch->w_local_GP.put;
+		if (put - (volatile s64) ch->w_remote_GP.get <
+							ch->local_nentries) {
+
+			/* There are available message entries. We need to try
+			 * to secure one for ourselves. We'll do this by trying
+			 * to increment w_local_GP.put as long as someone else
+			 * doesn't beat us to it. If they do, we'll have to
+			 * try again.
+		 	 */
+			if (cmpxchg(&ch->w_local_GP.put, put, put + 1) ==
+									put) {
+				/* we got the entry referenced by put */
+				break;
+			}
+			continue;	/* try again */
+		}
+
+
+		/*
+		 * There aren't any available msg entries at this time.
+		 *
+		 * In waiting for a message entry to become available,
+		 * we set a timeout in case the other side is not
+		 * sending completion IPIs. This lets us fake an IPI
+		 * that will cause the IPI handler to fetch the latest
+		 * GP values as if an IPI was sent by the other side.
+		 */
+		if (ret == xpcTimeout) {
+			xpc_IPI_send_local_msgrequest(ch);
+		}
+
+		if (flags & XPC_NOWAIT) {
+			xpc_msgqueue_deref(ch);
+			return xpcNoWait;
+		}
+
+		ret = xpc_allocate_msg_wait(ch);
+		if (ret != xpcInterrupted && ret != xpcTimeout) {
+			xpc_msgqueue_deref(ch);
+			return ret;
+		}
+	}
+
+
+	/* get the message's address and initialize it */
+	msg = (struct xpc_msg *) ((u64) ch->local_msgqueue +
+				(put % ch->local_nentries) * ch->msg_size);
+
+
+	DBUG_ON(msg->flags != 0);
+	msg->number = put;
+
+	dev_dbg(xpc_chan, "w_local_GP.put changed to %ld; msg=0x%p, "
+		"msg_number=%ld, partid=%d, channel=%d\n", put + 1,
+		(void *) msg, msg->number, ch->partid, ch->number);
+
+	*address_of_msg = msg;
+
+	return xpcSuccess;
+}
+
+
+/*
+ * Allocate an entry for a message from the message queue associated with the
+ * specified channel. NOTE that this routine can sleep waiting for a message
+ * entry to become available. To not sleep, pass in the XPC_NOWAIT flag.
+ *
+ * Arguments:
+ *
+ *	partid - ID of partition to which the channel is connected.
+ *	ch_number - channel #.
+ *	flags - see xpc.h for valid flags.
+ *	payload - address of the allocated payload area pointer (filled in on
+ * 	          return) in which the user-defined message is constructed.
+ */
+enum xpc_retval
+xpc_initiate_allocate(partid_t partid, int ch_number, u32 flags, void **payload)
+{
+	struct xpc_partition *part = &xpc_partitions[partid];
+	enum xpc_retval ret = xpcUnknownReason;
+	struct xpc_msg *msg;
+
+
+	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+	DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
+
+	*payload = NULL;
+
+	if (xpc_part_ref(part)) {
+		ret = xpc_allocate_msg(&part->channels[ch_number], flags, &msg);
+		xpc_part_deref(part);
+
+		if (msg != NULL) {
+			*payload = &msg->payload;
+		}
+	}
+
+	return ret;
+}
+
+
+/*
+ * Now we actually send the messages that are ready to be sent by advancing
+ * the local message queue's Put value and then send an IPI to the recipient
+ * partition.
+ */
+static void
+xpc_send_msgs(struct xpc_channel *ch, s64 initial_put)
+{
+	struct xpc_msg *msg;
+	s64 put = initial_put + 1;
+	int send_IPI = 0;
+
+
+	while (1) {
+
+		while (1) {
+			if (put == (volatile s64) ch->w_local_GP.put) {
+				break;
+			}
+
+			msg = (struct xpc_msg *) ((u64) ch->local_msgqueue +
+			       (put % ch->local_nentries) * ch->msg_size);
+
+			if (!(msg->flags & XPC_M_READY)) {
+				break;
+			}
+
+			put++;
+		}
+
+		if (put == initial_put) {
+			/* nothing's changed */
+			break;
+		}
+
+		if (cmpxchg_rel(&ch->local_GP->put, initial_put, put) !=
+								initial_put) {
+			/* someone else beat us to it */
+			DBUG_ON((volatile s64) ch->local_GP->put < initial_put);
+			break;
+		}
+
+		/* we just set the new value of local_GP->put */
+
+		dev_dbg(xpc_chan, "local_GP->put changed to %ld, partid=%d, "
+			"channel=%d\n", put, ch->partid, ch->number);
+
+		send_IPI = 1;
+
+		/*
+		 * We need to ensure that the message referenced by
+		 * local_GP->put is not XPC_M_READY or that local_GP->put
+		 * equals w_local_GP.put, so we'll go have a look.
+		 */
+		initial_put = put;
+	}
+
+	if (send_IPI) {
+		xpc_IPI_send_msgrequest(ch);
+	}
+}
+
+
+/*
+ * Common code that does the actual sending of the message by advancing the
+ * local message queue's Put value and sends an IPI to the partition the
+ * message is being sent to.
+ */
+static enum xpc_retval
+xpc_send_msg(struct xpc_channel *ch, struct xpc_msg *msg, u8 notify_type,
+			xpc_notify_func func, void *key)
+{
+	enum xpc_retval ret = xpcSuccess;
+	struct xpc_notify *notify = NULL;   // >>> to keep the compiler happy!!
+	s64 put, msg_number = msg->number;
+
+
+	DBUG_ON(notify_type == XPC_N_CALL && func == NULL);
+	DBUG_ON((((u64) msg - (u64) ch->local_msgqueue) / ch->msg_size) !=
+					msg_number % ch->local_nentries);
+	DBUG_ON(msg->flags & XPC_M_READY);
+
+	if (ch->flags & XPC_C_DISCONNECTING) {
+		/* drop the reference grabbed in xpc_allocate_msg() */
+		xpc_msgqueue_deref(ch);
+		return ch->reason;
+	}
+
+	if (notify_type != 0) {
+		/*
+		 * Tell the remote side to send an ACK interrupt when the
+		 * message has been delivered.
+		 */
+		msg->flags |= XPC_M_INTERRUPT;
+
+		atomic_inc(&ch->n_to_notify);
+
+		notify = &ch->notify_queue[msg_number % ch->local_nentries];
+		notify->func = func;
+		notify->key = key;
+		(volatile u8) notify->type = notify_type;
+
+		// >>> is a mb() needed here?
+
+		if (ch->flags & XPC_C_DISCONNECTING) {
+			/*
+			 * An error occurred between our last error check and
+			 * this one. We will try to clear the type field from
+			 * the notify entry. If we succeed then
+			 * xpc_disconnect_channel() didn't already process
+			 * the notify entry.
+			 */
+			if (cmpxchg(&notify->type, notify_type, 0) ==
+								notify_type) {
+				atomic_dec(&ch->n_to_notify);
+				ret = ch->reason;
+			}
+
+			/* drop the reference grabbed in xpc_allocate_msg() */
+			xpc_msgqueue_deref(ch);
+			return ret;
+		}
+	}
+
+	msg->flags |= XPC_M_READY;
+
+	/*
+	 * The preceding store of msg->flags must occur before the following
+	 * load of ch->local_GP->put.
+	 */
+	mb();
+
+	/* see if the message is next in line to be sent, if so send it */
+
+	put = ch->local_GP->put;
+	if (put == msg_number) {
+		xpc_send_msgs(ch, put);
+	}
+
+	/* drop the reference grabbed in xpc_allocate_msg() */
+	xpc_msgqueue_deref(ch);
+	return ret;
+}
+
+
+/*
+ * Send a message previously allocated using xpc_initiate_allocate() on the
+ * specified channel connected to the specified partition.
+ *
+ * This routine will not wait for the message to be received, nor will
+ * notification be given when it does happen. Once this routine has returned
+ * the message entry allocated via xpc_initiate_allocate() is no longer
+ * accessable to the caller.
+ *
+ * This routine, although called by users, does not call xpc_part_ref() to
+ * ensure that the partition infrastructure is in place. It relies on the
+ * fact that we called xpc_msgqueue_ref() in xpc_allocate_msg().
+ *
+ * Arguments:
+ *
+ *	partid - ID of partition to which the channel is connected.
+ *	ch_number - channel # to send message on.
+ *	payload - pointer to the payload area allocated via
+ *			xpc_initiate_allocate().
+ */
+enum xpc_retval
+xpc_initiate_send(partid_t partid, int ch_number, void *payload)
+{
+	struct xpc_partition *part = &xpc_partitions[partid];
+	struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
+	enum xpc_retval ret;
+
+
+	dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *) msg,
+		partid, ch_number);
+
+	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+	DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
+	DBUG_ON(msg == NULL);
+
+	ret = xpc_send_msg(&part->channels[ch_number], msg, 0, NULL, NULL);
+
+	return ret;
+}
+
+
+/*
+ * Send a message previously allocated using xpc_initiate_allocate on the
+ * specified channel connected to the specified partition.
+ *
+ * This routine will not wait for the message to be sent. Once this routine
+ * has returned the message entry allocated via xpc_initiate_allocate() is no
+ * longer accessable to the caller.
+ *
+ * Once the remote end of the channel has received the message, the function
+ * passed as an argument to xpc_initiate_send_notify() will be called. This
+ * allows the sender to free up or re-use any buffers referenced by the
+ * message, but does NOT mean the message has been processed at the remote
+ * end by a receiver.
+ *
+ * If this routine returns an error, the caller's function will NOT be called.
+ *
+ * This routine, although called by users, does not call xpc_part_ref() to
+ * ensure that the partition infrastructure is in place. It relies on the
+ * fact that we called xpc_msgqueue_ref() in xpc_allocate_msg().
+ *
+ * Arguments:
+ *
+ *	partid - ID of partition to which the channel is connected.
+ *	ch_number - channel # to send message on.
+ *	payload - pointer to the payload area allocated via
+ *			xpc_initiate_allocate().
+ *	func - function to call with asynchronous notification of message
+ *		  receipt. THIS FUNCTION MUST BE NON-BLOCKING.
+ *	key - user-defined key to be passed to the function when it's called.
+ */
+enum xpc_retval
+xpc_initiate_send_notify(partid_t partid, int ch_number, void *payload,
+				xpc_notify_func func, void *key)
+{
+	struct xpc_partition *part = &xpc_partitions[partid];
+	struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
+	enum xpc_retval ret;
+
+
+	dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *) msg,
+		partid, ch_number);
+
+	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+	DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
+	DBUG_ON(msg == NULL);
+	DBUG_ON(func == NULL);
+
+	ret = xpc_send_msg(&part->channels[ch_number], msg, XPC_N_CALL,
+								func, key);
+	return ret;
+}
+
+
+static struct xpc_msg *
+xpc_pull_remote_msg(struct xpc_channel *ch, s64 get)
+{
+	struct xpc_partition *part = &xpc_partitions[ch->partid];
+	struct xpc_msg *remote_msg, *msg;
+	u32 msg_index, nmsgs;
+	u64 msg_offset;
+	enum xpc_retval ret;
+
+
+	if (down_interruptible(&ch->msg_to_pull_sema) != 0) {
+		/* we were interrupted by a signal */
+		return NULL;
+	}
+
+	while (get >= ch->next_msg_to_pull) {
+
+		/* pull as many messages as are ready and able to be pulled */
+
+		msg_index = ch->next_msg_to_pull % ch->remote_nentries;
+
+		DBUG_ON(ch->next_msg_to_pull >=
+					(volatile s64) ch->w_remote_GP.put);
+		nmsgs =  (volatile s64) ch->w_remote_GP.put -
+						ch->next_msg_to_pull;
+		if (msg_index + nmsgs > ch->remote_nentries) {
+			/* ignore the ones that wrap the msg queue for now */
+			nmsgs = ch->remote_nentries - msg_index;
+		}
+
+		msg_offset = msg_index * ch->msg_size;
+		msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue +
+								msg_offset);
+		remote_msg = (struct xpc_msg *) (ch->remote_msgqueue_pa +
+								msg_offset);
+
+		if ((ret = xpc_pull_remote_cachelines(part, msg, remote_msg,
+				nmsgs * ch->msg_size)) != xpcSuccess) {
+
+			dev_dbg(xpc_chan, "failed to pull %d msgs starting with"
+				" msg %ld from partition %d, channel=%d, "
+				"ret=%d\n", nmsgs, ch->next_msg_to_pull,
+				ch->partid, ch->number, ret);
+
+			XPC_DEACTIVATE_PARTITION(part, ret);
+
+			up(&ch->msg_to_pull_sema);
+			return NULL;
+		}
+
+		mb();	/* >>> this may not be needed, we're not sure */
+
+		ch->next_msg_to_pull += nmsgs;
+	}
+
+	up(&ch->msg_to_pull_sema);
+
+	/* return the message we were looking for */
+	msg_offset = (get % ch->remote_nentries) * ch->msg_size;
+	msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue + msg_offset);
+
+	return msg;
+}
+
+
+/*
+ * Get a message to be delivered.
+ */
+static struct xpc_msg *
+xpc_get_deliverable_msg(struct xpc_channel *ch)
+{
+	struct xpc_msg *msg = NULL;
+	s64 get;
+
+
+	do {
+		if ((volatile u32) ch->flags & XPC_C_DISCONNECTING) {
+			break;
+		}
+
+		get = (volatile s64) ch->w_local_GP.get;
+		if (get == (volatile s64) ch->w_remote_GP.put) {
+			break;
+		}
+
+		/* There are messages waiting to be pulled and delivered.
+		 * We need to try to secure one for ourselves. We'll do this
+		 * by trying to increment w_local_GP.get and hope that no one
+		 * else beats us to it. If they do, we'll we'll simply have
+		 * to try again for the next one.
+	 	 */
+
+		if (cmpxchg(&ch->w_local_GP.get, get, get + 1) == get) {
+			/* we got the entry referenced by get */
+
+			dev_dbg(xpc_chan, "w_local_GP.get changed to %ld, "
+				"partid=%d, channel=%d\n", get + 1,
+				ch->partid, ch->number);
+
+			/* pull the message from the remote partition */
+
+			msg = xpc_pull_remote_msg(ch, get);
+
+			DBUG_ON(msg != NULL && msg->number != get);
+			DBUG_ON(msg != NULL && (msg->flags & XPC_M_DONE));
+			DBUG_ON(msg != NULL && !(msg->flags & XPC_M_READY));
+
+			break;
+		}
+
+	} while (1);
+
+	return msg;
+}
+
+
+/*
+ * Deliver a message to its intended recipient.
+ */
+void
+xpc_deliver_msg(struct xpc_channel *ch)
+{
+	struct xpc_msg *msg;
+
+
+	if ((msg = xpc_get_deliverable_msg(ch)) != NULL) {
+
+		/*
+		 * This ref is taken to protect the payload itself from being
+		 * freed before the user is finished with it, which the user
+		 * indicates by calling xpc_initiate_received().
+		 */
+		xpc_msgqueue_ref(ch);
+
+		atomic_inc(&ch->kthreads_active);
+
+		if (ch->func != NULL) {
+			dev_dbg(xpc_chan, "ch->func() called, msg=0x%p, "
+				"msg_number=%ld, partid=%d, channel=%d\n",
+				(void *) msg, msg->number, ch->partid,
+				ch->number);
+
+			/* deliver the message to its intended recipient */
+			ch->func(xpcMsgReceived, ch->partid, ch->number,
+					&msg->payload, ch->key);
+
+			dev_dbg(xpc_chan, "ch->func() returned, msg=0x%p, "
+				"msg_number=%ld, partid=%d, channel=%d\n",
+				(void *) msg, msg->number, ch->partid,
+				ch->number);
+		}
+
+		atomic_dec(&ch->kthreads_active);
+	}
+}
+
+
+/*
+ * Now we actually acknowledge the messages that have been delivered and ack'd
+ * by advancing the cached remote message queue's Get value and if requested
+ * send an IPI to the message sender's partition.
+ */
+static void
+xpc_acknowledge_msgs(struct xpc_channel *ch, s64 initial_get, u8 msg_flags)
+{
+	struct xpc_msg *msg;
+	s64 get = initial_get + 1;
+	int send_IPI = 0;
+
+
+	while (1) {
+
+		while (1) {
+			if (get == (volatile s64) ch->w_local_GP.get) {
+				break;
+			}
+
+			msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue +
+			       (get % ch->remote_nentries) * ch->msg_size);
+
+			if (!(msg->flags & XPC_M_DONE)) {
+				break;
+			}
+
+			msg_flags |= msg->flags;
+			get++;
+		}
+
+		if (get == initial_get) {
+			/* nothing's changed */
+			break;
+		}
+
+		if (cmpxchg_rel(&ch->local_GP->get, initial_get, get) !=
+								initial_get) {
+			/* someone else beat us to it */
+			DBUG_ON((volatile s64) ch->local_GP->get <=
+								initial_get);
+			break;
+		}
+
+		/* we just set the new value of local_GP->get */
+
+		dev_dbg(xpc_chan, "local_GP->get changed to %ld, partid=%d, "
+			"channel=%d\n", get, ch->partid, ch->number);
+
+		send_IPI = (msg_flags & XPC_M_INTERRUPT);
+
+		/*
+		 * We need to ensure that the message referenced by
+		 * local_GP->get is not XPC_M_DONE or that local_GP->get
+		 * equals w_local_GP.get, so we'll go have a look.
+		 */
+		initial_get = get;
+	}
+
+	if (send_IPI) {
+		xpc_IPI_send_msgrequest(ch);
+	}
+}
+
+
+/*
+ * Acknowledge receipt of a delivered message.
+ *
+ * If a message has XPC_M_INTERRUPT set, send an interrupt to the partition
+ * that sent the message.
+ *
+ * This function, although called by users, does not call xpc_part_ref() to
+ * ensure that the partition infrastructure is in place. It relies on the
+ * fact that we called xpc_msgqueue_ref() in xpc_deliver_msg().
+ *
+ * Arguments:
+ *
+ *	partid - ID of partition to which the channel is connected.
+ *	ch_number - channel # message received on.
+ *	payload - pointer to the payload area allocated via
+ *			xpc_initiate_allocate().
+ */
+void
+xpc_initiate_received(partid_t partid, int ch_number, void *payload)
+{
+	struct xpc_partition *part = &xpc_partitions[partid];
+	struct xpc_channel *ch;
+	struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
+	s64 get, msg_number = msg->number;
+
+
+	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+	DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
+
+	ch = &part->channels[ch_number];
+
+	dev_dbg(xpc_chan, "msg=0x%p, msg_number=%ld, partid=%d, channel=%d\n",
+		(void *) msg, msg_number, ch->partid, ch->number);
+
+	DBUG_ON((((u64) msg - (u64) ch->remote_msgqueue) / ch->msg_size) !=
+					msg_number % ch->remote_nentries);
+	DBUG_ON(msg->flags & XPC_M_DONE);
+
+	msg->flags |= XPC_M_DONE;
+
+	/*
+	 * The preceding store of msg->flags must occur before the following
+	 * load of ch->local_GP->get.
+	 */
+	mb();
+
+	/*
+	 * See if this message is next in line to be acknowledged as having
+	 * been delivered.
+	 */
+	get = ch->local_GP->get;
+	if (get == msg_number) {
+		xpc_acknowledge_msgs(ch, get, msg->flags);
+	}
+
+	/* the call to xpc_msgqueue_ref() was done by xpc_deliver_msg()  */
+	xpc_msgqueue_deref(ch);
+}
+

arch/ia64/sn/kernel/xpc_main.c

···
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2004-2005 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+
+
+/*
+ * Cross Partition Communication (XPC) support - standard version.
+ *
+ *	XPC provides a message passing capability that crosses partition
+ *	boundaries. This module is made up of two parts:
+ *
+ *	    partition	This part detects the presence/absence of other
+ *			partitions. It provides a heartbeat and monitors
+ *			the heartbeats of other partitions.
+ *
+ *	    channel	This part manages the channels and sends/receives
+ *			messages across them to/from other partitions.
+ *
+ *	There are a couple of additional functions residing in XP, which
+ *	provide an interface to XPC for its users.
+ *
+ *
+ *	Caveats:
+ *
+ *	  . We currently have no way to determine which nasid an IPI came
+ *	    from. Thus, xpc_IPI_send() does a remote AMO write followed by
+ *	    an IPI. The AMO indicates where data is to be pulled from, so
+ *	    after the IPI arrives, the remote partition checks the AMO word.
+ *	    The IPI can actually arrive before the AMO however, so other code
+ *	    must periodically check for this case. Also, remote AMO operations
+ *	    do not reliably time out. Thus we do a remote PIO read solely to
+ *	    know whether the remote partition is down and whether we should
+ *	    stop sending IPIs to it. This remote PIO read operation is set up
+ *	    in a special nofault region so SAL knows to ignore (and cleanup)
+ *	    any errors due to the remote AMO write, PIO read, and/or PIO
+ *	    write operations.
+ *
+ *	    If/when new hardware solves this IPI problem, we should abandon
+ *	    the current approach.
+ *
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/syscalls.h>
+#include <linux/cache.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <asm/sn/intr.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/uaccess.h>
+#include "xpc.h"
+
+
+/* define two XPC debug device structures to be used with dev_dbg() et al */
+
+struct device_driver xpc_dbg_name = {
+	.name = "xpc"
+};
+
+struct device xpc_part_dbg_subname = {
+	.bus_id = {0},		/* set to "part" at xpc_init() time */
+	.driver = &xpc_dbg_name
+};
+
+struct device xpc_chan_dbg_subname = {
+	.bus_id = {0},		/* set to "chan" at xpc_init() time */
+	.driver = &xpc_dbg_name
+};
+
+struct device *xpc_part = &xpc_part_dbg_subname;
+struct device *xpc_chan = &xpc_chan_dbg_subname;
+
+
+/* systune related variables for /proc/sys directories */
+
+static int xpc_hb_min = 1;
+static int xpc_hb_max = 10;
+
+static int xpc_hb_check_min = 10;
+static int xpc_hb_check_max = 120;
+
+static ctl_table xpc_sys_xpc_hb_dir[] = {
+	{
+		1,
+		"hb_interval",
+		&xpc_hb_interval,
+		sizeof(int),
+		0644,
+		NULL,
+		&proc_dointvec_minmax,
+		&sysctl_intvec,
+		NULL,
+		&xpc_hb_min, &xpc_hb_max
+	},
+	{
+		2,
+		"hb_check_interval",
+		&xpc_hb_check_interval,
+		sizeof(int),
+		0644,
+		NULL,
+		&proc_dointvec_minmax,
+		&sysctl_intvec,
+		NULL,
+		&xpc_hb_check_min, &xpc_hb_check_max
+	},
+	{0}
+};
+static ctl_table xpc_sys_xpc_dir[] = {
+	{
+		1,
+		"hb",
+		NULL,
+		0,
+		0555,
+		xpc_sys_xpc_hb_dir
+	},
+	{0}
+};
+static ctl_table xpc_sys_dir[] = {
+	{
+		1,
+		"xpc",
+		NULL,
+		0,
+		0555,
+		xpc_sys_xpc_dir
+	},
+	{0}
+};
+static struct ctl_table_header *xpc_sysctl;
+
+
+/* #of IRQs received */
+static atomic_t xpc_act_IRQ_rcvd;
+
+/* IRQ handler notifies this wait queue on receipt of an IRQ */
+static DECLARE_WAIT_QUEUE_HEAD(xpc_act_IRQ_wq);
+
+static unsigned long xpc_hb_check_timeout;
+
+/* xpc_hb_checker thread exited notification */
+static DECLARE_MUTEX_LOCKED(xpc_hb_checker_exited);
+
+/* xpc_discovery thread exited notification */
+static DECLARE_MUTEX_LOCKED(xpc_discovery_exited);
+
+
+static struct timer_list xpc_hb_timer;
+
+
+static void xpc_kthread_waitmsgs(struct xpc_partition *, struct xpc_channel *);
+
+
+/*
+ * Notify the heartbeat check thread that an IRQ has been received.
+ */
+static irqreturn_t
+xpc_act_IRQ_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+	atomic_inc(&xpc_act_IRQ_rcvd);
+	wake_up_interruptible(&xpc_act_IRQ_wq);
+	return IRQ_HANDLED;
+}
+
+
+/*
+ * Timer to produce the heartbeat.  The timer structures function is
+ * already set when this is initially called.  A tunable is used to
+ * specify when the next timeout should occur.
+ */
+static void
+xpc_hb_beater(unsigned long dummy)
+{
+	xpc_vars->heartbeat++;
+
+	if (jiffies >= xpc_hb_check_timeout) {
+		wake_up_interruptible(&xpc_act_IRQ_wq);
+	}
+
+	xpc_hb_timer.expires = jiffies + (xpc_hb_interval * HZ);
+	add_timer(&xpc_hb_timer);
+}
+
+
+/*
+ * This thread is responsible for nearly all of the partition
+ * activation/deactivation.
+ */
+static int
+xpc_hb_checker(void *ignore)
+{
+	int last_IRQ_count = 0;
+	int new_IRQ_count;
+	int force_IRQ=0;
+
+
+	/* this thread was marked active by xpc_hb_init() */
+
+	daemonize(XPC_HB_CHECK_THREAD_NAME);
+
+	set_cpus_allowed(current, cpumask_of_cpu(XPC_HB_CHECK_CPU));
+
+	xpc_hb_check_timeout = jiffies + (xpc_hb_check_interval * HZ);
+
+	while (!(volatile int) xpc_exiting) {
+
+		/* wait for IRQ or timeout */
+		(void) wait_event_interruptible(xpc_act_IRQ_wq,
+			    (last_IRQ_count < atomic_read(&xpc_act_IRQ_rcvd) ||
+					jiffies >= xpc_hb_check_timeout ||
+						(volatile int) xpc_exiting));
+
+		dev_dbg(xpc_part, "woke up with %d ticks rem; %d IRQs have "
+			"been received\n",
+			(int) (xpc_hb_check_timeout - jiffies),
+			atomic_read(&xpc_act_IRQ_rcvd) - last_IRQ_count);
+
+
+		/* checking of remote heartbeats is skewed by IRQ handling */
+		if (jiffies >= xpc_hb_check_timeout) {
+			dev_dbg(xpc_part, "checking remote heartbeats\n");
+			xpc_check_remote_hb();
+
+			/*
+			 * We need to periodically recheck to ensure no
+			 * IPI/AMO pairs have been missed.  That check
+			 * must always reset xpc_hb_check_timeout.
+			 */
+			force_IRQ = 1;
+		}
+
+
+		new_IRQ_count = atomic_read(&xpc_act_IRQ_rcvd);
+		if (last_IRQ_count < new_IRQ_count || force_IRQ != 0) {
+			force_IRQ = 0;
+
+			dev_dbg(xpc_part, "found an IRQ to process; will be "
+				"resetting xpc_hb_check_timeout\n");
+
+			last_IRQ_count += xpc_identify_act_IRQ_sender();
+			if (last_IRQ_count < new_IRQ_count) {
+				/* retry once to help avoid missing AMO */
+				(void) xpc_identify_act_IRQ_sender();
+			}
+			last_IRQ_count = new_IRQ_count;
+
+			xpc_hb_check_timeout = jiffies +
+					   (xpc_hb_check_interval * HZ);
+		}
+	}
+
+	dev_dbg(xpc_part, "heartbeat checker is exiting\n");
+
+
+	/* mark this thread as inactive */
+	up(&xpc_hb_checker_exited);
+	return 0;
+}
+
+
+/*
+ * This thread will attempt to discover other partitions to activate
+ * based on info provided by SAL. This new thread is short lived and
+ * will exit once discovery is complete.
+ */
+static int
+xpc_initiate_discovery(void *ignore)
+{
+	daemonize(XPC_DISCOVERY_THREAD_NAME);
+
+	xpc_discovery();
+
+	dev_dbg(xpc_part, "discovery thread is exiting\n");
+
+	/* mark this thread as inactive */
+	up(&xpc_discovery_exited);
+	return 0;
+}
+
+
+/*
+ * Establish first contact with the remote partititon. This involves pulling
+ * the XPC per partition variables from the remote partition and waiting for
+ * the remote partition to pull ours.
+ */
+static enum xpc_retval
+xpc_make_first_contact(struct xpc_partition *part)
+{
+	enum xpc_retval ret;
+
+
+	while ((ret = xpc_pull_remote_vars_part(part)) != xpcSuccess) {
+		if (ret != xpcRetry) {
+			XPC_DEACTIVATE_PARTITION(part, ret);
+			return ret;
+		}
+
+		dev_dbg(xpc_chan, "waiting to make first contact with "
+			"partition %d\n", XPC_PARTID(part));
+
+		/* wait a 1/4 of a second or so */
+		set_current_state(TASK_INTERRUPTIBLE);
+		(void) schedule_timeout(0.25 * HZ);
+
+		if (part->act_state == XPC_P_DEACTIVATING) {
+			return part->reason;
+		}
+	}
+
+	return xpc_mark_partition_active(part);
+}
+
+
+/*
+ * The first kthread assigned to a newly activated partition is the one
+ * created by XPC HB with which it calls xpc_partition_up(). XPC hangs on to
+ * that kthread until the partition is brought down, at which time that kthread
+ * returns back to XPC HB. (The return of that kthread will signify to XPC HB
+ * that XPC has dismantled all communication infrastructure for the associated
+ * partition.) This kthread becomes the channel manager for that partition.
+ *
+ * Each active partition has a channel manager, who, besides connecting and
+ * disconnecting channels, will ensure that each of the partition's connected
+ * channels has the required number of assigned kthreads to get the work done.
+ */
+static void
+xpc_channel_mgr(struct xpc_partition *part)
+{
+	while (part->act_state != XPC_P_DEACTIVATING ||
+				atomic_read(&part->nchannels_active) > 0) {
+
+		xpc_process_channel_activity(part);
+
+
+		/*
+		 * Wait until we've been requested to activate kthreads or
+		 * all of the channel's message queues have been torn down or
+		 * a signal is pending.
+		 *
+		 * The channel_mgr_requests is set to 1 after being awakened,
+		 * This is done to prevent the channel mgr from making one pass
+		 * through the loop for each request, since he will
+		 * be servicing all the requests in one pass. The reason it's
+		 * set to 1 instead of 0 is so that other kthreads will know
+		 * that the channel mgr is running and won't bother trying to
+		 * wake him up.
+		 */
+		atomic_dec(&part->channel_mgr_requests);
+		(void) wait_event_interruptible(part->channel_mgr_wq,
+				(atomic_read(&part->channel_mgr_requests) > 0 ||
+				(volatile u64) part->local_IPI_amo != 0 ||
+				((volatile u8) part->act_state ==
+							XPC_P_DEACTIVATING &&
+				atomic_read(&part->nchannels_active) == 0)));
+		atomic_set(&part->channel_mgr_requests, 1);
+
+		// >>> Does it need to wakeup periodically as well? In case we
+		// >>> miscalculated the #of kthreads to wakeup or create?
+	}
+}
+
+
+/*
+ * When XPC HB determines that a partition has come up, it will create a new
+ * kthread and that kthread will call this function to attempt to set up the
+ * basic infrastructure used for Cross Partition Communication with the newly
+ * upped partition.
+ *
+ * The kthread that was created by XPC HB and which setup the XPC
+ * infrastructure will remain assigned to the partition until the partition
+ * goes down. At which time the kthread will teardown the XPC infrastructure
+ * and then exit.
+ *
+ * XPC HB will put the remote partition's XPC per partition specific variables
+ * physical address into xpc_partitions[partid].remote_vars_part_pa prior to
+ * calling xpc_partition_up().
+ */
+static void
+xpc_partition_up(struct xpc_partition *part)
+{
+	DBUG_ON(part->channels != NULL);
+
+	dev_dbg(xpc_chan, "activating partition %d\n", XPC_PARTID(part));
+
+	if (xpc_setup_infrastructure(part) != xpcSuccess) {
+		return;
+	}
+
+	/*
+	 * The kthread that XPC HB called us with will become the
+	 * channel manager for this partition. It will not return
+	 * back to XPC HB until the partition's XPC infrastructure
+	 * has been dismantled.
+	 */
+
+	(void) xpc_part_ref(part);	/* this will always succeed */
+
+	if (xpc_make_first_contact(part) == xpcSuccess) {
+		xpc_channel_mgr(part);
+	}
+
+	xpc_part_deref(part);
+
+	xpc_teardown_infrastructure(part);
+}
+
+
+static int
+xpc_activating(void *__partid)
+{
+	partid_t partid = (u64) __partid;
+	struct xpc_partition *part = &xpc_partitions[partid];
+	unsigned long irq_flags;
+	struct sched_param param = { sched_priority: MAX_USER_RT_PRIO - 1 };
+	int ret;
+
+
+	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+
+	spin_lock_irqsave(&part->act_lock, irq_flags);
+
+	if (part->act_state == XPC_P_DEACTIVATING) {
+		part->act_state = XPC_P_INACTIVE;
+		spin_unlock_irqrestore(&part->act_lock, irq_flags);
+		part->remote_rp_pa = 0;
+		return 0;
+	}
+
+	/* indicate the thread is activating */
+	DBUG_ON(part->act_state != XPC_P_ACTIVATION_REQ);
+	part->act_state = XPC_P_ACTIVATING;
+
+	XPC_SET_REASON(part, 0, 0);
+	spin_unlock_irqrestore(&part->act_lock, irq_flags);
+
+	dev_dbg(xpc_part, "bringing partition %d up\n", partid);
+
+	daemonize("xpc%02d", partid);
+
+	/*
+	 * This thread needs to run at a realtime priority to prevent a
+	 * significant performance degradation.
+	 */
+	ret = sched_setscheduler(current, SCHED_FIFO, &param);
+	if (ret != 0) {
+		dev_warn(xpc_part, "unable to set pid %d to a realtime "
+			"priority, ret=%d\n", current->pid, ret);
+	}
+
+	/* allow this thread and its children to run on any CPU */
+	set_cpus_allowed(current, CPU_MASK_ALL);
+
+	/*
+	 * Register the remote partition's AMOs with SAL so it can handle
+	 * and cleanup errors within that address range should the remote
+	 * partition go down. We don't unregister this range because it is
+	 * difficult to tell when outstanding writes to the remote partition
+	 * are finished and thus when it is safe to unregister. This should
+	 * not result in wasted space in the SAL xp_addr_region table because
+	 * we should get the same page for remote_amos_page_pa after module
+	 * reloads and system reboots.
+	 */
+	if (sn_register_xp_addr_region(part->remote_amos_page_pa,
+							PAGE_SIZE, 1) < 0) {
+		dev_warn(xpc_part, "xpc_partition_up(%d) failed to register "
+			"xp_addr region\n", partid);
+
+		spin_lock_irqsave(&part->act_lock, irq_flags);
+		part->act_state = XPC_P_INACTIVE;
+		XPC_SET_REASON(part, xpcPhysAddrRegFailed, __LINE__);
+		spin_unlock_irqrestore(&part->act_lock, irq_flags);
+		part->remote_rp_pa = 0;
+		return 0;
+	}
+
+	XPC_ALLOW_HB(partid, xpc_vars);
+	xpc_IPI_send_activated(part);
+
+
+	/*
+	 * xpc_partition_up() holds this thread and marks this partition as
+	 * XPC_P_ACTIVE by calling xpc_hb_mark_active().
+	 */
+	(void) xpc_partition_up(part);
+
+	xpc_mark_partition_inactive(part);
+
+	if (part->reason == xpcReactivating) {
+		/* interrupting ourselves results in activating partition */
+		xpc_IPI_send_reactivate(part);
+	}
+
+	return 0;
+}
+
+
+void
+xpc_activate_partition(struct xpc_partition *part)
+{
+	partid_t partid = XPC_PARTID(part);
+	unsigned long irq_flags;
+	pid_t pid;
+
+
+	spin_lock_irqsave(&part->act_lock, irq_flags);
+
+	pid = kernel_thread(xpc_activating, (void *) ((u64) partid), 0);
+
+	DBUG_ON(part->act_state != XPC_P_INACTIVE);
+
+	if (pid > 0) {
+		part->act_state = XPC_P_ACTIVATION_REQ;
+		XPC_SET_REASON(part, xpcCloneKThread, __LINE__);
+	} else {
+		XPC_SET_REASON(part, xpcCloneKThreadFailed, __LINE__);
+	}
+
+	spin_unlock_irqrestore(&part->act_lock, irq_flags);
+}
+
+
+/*
+ * Handle the receipt of a SGI_XPC_NOTIFY IRQ by seeing whether the specified
+ * partition actually sent it. Since SGI_XPC_NOTIFY IRQs may be shared by more
+ * than one partition, we use an AMO_t structure per partition to indicate
+ * whether a partition has sent an IPI or not.  >>> If it has, then wake up the
+ * associated kthread to handle it.
+ *
+ * All SGI_XPC_NOTIFY IRQs received by XPC are the result of IPIs sent by XPC
+ * running on other partitions.
+ *
+ * Noteworthy Arguments:
+ *
+ *	irq - Interrupt ReQuest number. NOT USED.
+ *
+ *	dev_id - partid of IPI's potential sender.
+ *
+ *	regs - processor's context before the processor entered
+ *	       interrupt code. NOT USED.
+ */
+irqreturn_t
+xpc_notify_IRQ_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+	partid_t partid = (partid_t) (u64) dev_id;
+	struct xpc_partition *part = &xpc_partitions[partid];
+
+
+	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+
+	if (xpc_part_ref(part)) {
+		xpc_check_for_channel_activity(part);
+
+		xpc_part_deref(part);
+	}
+	return IRQ_HANDLED;
+}
+
+
+/*
+ * Check to see if xpc_notify_IRQ_handler() dropped any IPIs on the floor
+ * because the write to their associated IPI amo completed after the IRQ/IPI
+ * was received.
+ */
+void
+xpc_dropped_IPI_check(struct xpc_partition *part)
+{
+	if (xpc_part_ref(part)) {
+		xpc_check_for_channel_activity(part);
+
+		part->dropped_IPI_timer.expires = jiffies +
+							XPC_P_DROPPED_IPI_WAIT;
+		add_timer(&part->dropped_IPI_timer);
+		xpc_part_deref(part);
+	}
+}
+
+
+void
+xpc_activate_kthreads(struct xpc_channel *ch, int needed)
+{
+	int idle = atomic_read(&ch->kthreads_idle);
+	int assigned = atomic_read(&ch->kthreads_assigned);
+	int wakeup;
+
+
+	DBUG_ON(needed <= 0);
+
+	if (idle > 0) {
+		wakeup = (needed > idle) ? idle : needed;
+		needed -= wakeup;
+
+		dev_dbg(xpc_chan, "wakeup %d idle kthreads, partid=%d, "
+			"channel=%d\n", wakeup, ch->partid, ch->number);
+
+		/* only wakeup the requested number of kthreads */
+		wake_up_nr(&ch->idle_wq, wakeup);
+	}
+
+	if (needed <= 0) {
+		return;
+	}
+
+	if (needed + assigned > ch->kthreads_assigned_limit) {
+		needed = ch->kthreads_assigned_limit - assigned;
+		// >>>should never be less than 0
+		if (needed <= 0) {
+			return;
+		}
+	}
+
+	dev_dbg(xpc_chan, "create %d new kthreads, partid=%d, channel=%d\n",
+		needed, ch->partid, ch->number);
+
+	xpc_create_kthreads(ch, needed);
+}
+
+
+/*
+ * This function is where XPC's kthreads wait for messages to deliver.
+ */
+static void
+xpc_kthread_waitmsgs(struct xpc_partition *part, struct xpc_channel *ch)
+{
+	do {
+		/* deliver messages to their intended recipients */
+
+		while ((volatile s64) ch->w_local_GP.get <
+				(volatile s64) ch->w_remote_GP.put &&
+					!((volatile u32) ch->flags &
+						XPC_C_DISCONNECTING)) {
+			xpc_deliver_msg(ch);
+		}
+
+		if (atomic_inc_return(&ch->kthreads_idle) >
+						ch->kthreads_idle_limit) {
+			/* too many idle kthreads on this channel */
+			atomic_dec(&ch->kthreads_idle);
+			break;
+		}
+
+		dev_dbg(xpc_chan, "idle kthread calling "
+			"wait_event_interruptible_exclusive()\n");
+
+		(void) wait_event_interruptible_exclusive(ch->idle_wq,
+				((volatile s64) ch->w_local_GP.get <
+					(volatile s64) ch->w_remote_GP.put ||
+				((volatile u32) ch->flags &
+						XPC_C_DISCONNECTING)));
+
+		atomic_dec(&ch->kthreads_idle);
+
+	} while (!((volatile u32) ch->flags & XPC_C_DISCONNECTING));
+}
+
+
+static int
+xpc_daemonize_kthread(void *args)
+{
+	partid_t partid = XPC_UNPACK_ARG1(args);
+	u16 ch_number = XPC_UNPACK_ARG2(args);
+	struct xpc_partition *part = &xpc_partitions[partid];
+	struct xpc_channel *ch;
+	int n_needed;
+
+
+	daemonize("xpc%02dc%d", partid, ch_number);
+
+	dev_dbg(xpc_chan, "kthread starting, partid=%d, channel=%d\n",
+		partid, ch_number);
+
+	ch = &part->channels[ch_number];
+
+	if (!(ch->flags & XPC_C_DISCONNECTING)) {
+		DBUG_ON(!(ch->flags & XPC_C_CONNECTED));
+
+		/* let registerer know that connection has been established */
+
+		if (atomic_read(&ch->kthreads_assigned) == 1) {
+			xpc_connected_callout(ch);
+
+			/*
+			 * It is possible that while the callout was being
+			 * made that the remote partition sent some messages.
+			 * If that is the case, we may need to activate
+			 * additional kthreads to help deliver them. We only
+			 * need one less than total #of messages to deliver.
+			 */
+			n_needed = ch->w_remote_GP.put - ch->w_local_GP.get - 1;
+			if (n_needed > 0 &&
+					!(ch->flags & XPC_C_DISCONNECTING)) {
+				xpc_activate_kthreads(ch, n_needed);
+			}
+		}
+
+		xpc_kthread_waitmsgs(part, ch);
+	}
+
+	if (atomic_dec_return(&ch->kthreads_assigned) == 0 &&
+			((ch->flags & XPC_C_CONNECTCALLOUT) ||
+				(ch->reason != xpcUnregistering &&
+					ch->reason != xpcOtherUnregistering))) {
+		xpc_disconnected_callout(ch);
+	}
+
+
+	xpc_msgqueue_deref(ch);
+
+	dev_dbg(xpc_chan, "kthread exiting, partid=%d, channel=%d\n",
+		partid, ch_number);
+
+	xpc_part_deref(part);
+	return 0;
+}
+
+
+/*
+ * For each partition that XPC has established communications with, there is
+ * a minimum of one kernel thread assigned to perform any operation that
+ * may potentially sleep or block (basically the callouts to the asynchronous
+ * functions registered via xpc_connect()).
+ *
+ * Additional kthreads are created and destroyed by XPC as the workload
+ * demands.
+ *
+ * A kthread is assigned to one of the active channels that exists for a given
+ * partition.
+ */
+void
+xpc_create_kthreads(struct xpc_channel *ch, int needed)
+{
+	unsigned long irq_flags;
+	pid_t pid;
+	u64 args = XPC_PACK_ARGS(ch->partid, ch->number);
+
+
+	while (needed-- > 0) {
+		pid = kernel_thread(xpc_daemonize_kthread, (void *) args, 0);
+		if (pid < 0) {
+			/* the fork failed */
+
+			if (atomic_read(&ch->kthreads_assigned) <
+						ch->kthreads_idle_limit) {
+				/*
+				 * Flag this as an error only if we have an
+				 * insufficient #of kthreads for the channel
+				 * to function.
+				 *
+				 * No xpc_msgqueue_ref() is needed here since
+				 * the channel mgr is doing this.
+				 */
+				spin_lock_irqsave(&ch->lock, irq_flags);
+				XPC_DISCONNECT_CHANNEL(ch, xpcLackOfResources,
+								&irq_flags);
+				spin_unlock_irqrestore(&ch->lock, irq_flags);
+			}
+			break;
+		}
+
+		/*
+		 * The following is done on behalf of the newly created
+		 * kthread. That kthread is responsible for doing the
+		 * counterpart to the following before it exits.
+		 */
+		(void) xpc_part_ref(&xpc_partitions[ch->partid]);
+		xpc_msgqueue_ref(ch);
+		atomic_inc(&ch->kthreads_assigned);
+		ch->kthreads_created++;	// >>> temporary debug only!!!
+	}
+}
+
+
+void
+xpc_disconnect_wait(int ch_number)
+{
+	partid_t partid;
+	struct xpc_partition *part;
+	struct xpc_channel *ch;
+
+
+	/* now wait for all callouts to the caller's function to cease */
+	for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+		part = &xpc_partitions[partid];
+
+		if (xpc_part_ref(part)) {
+			ch = &part->channels[ch_number];
+
+// >>> how do we keep from falling into the window between our check and going
+// >>> down and coming back up where sema is re-inited?
+			if (ch->flags & XPC_C_SETUP) {
+				(void) down(&ch->teardown_sema);
+			}
+
+			xpc_part_deref(part);
+		}
+	}
+}
+
+
+static void
+xpc_do_exit(void)
+{
+	partid_t partid;
+	int active_part_count;
+	struct xpc_partition *part;
+
+
+	/* now it's time to eliminate our heartbeat */
+	del_timer_sync(&xpc_hb_timer);
+	xpc_vars->heartbeating_to_mask = 0;
+
+	/* indicate to others that our reserved page is uninitialized */
+	xpc_rsvd_page->vars_pa = 0;
+
+	/*
+	 * Ignore all incoming interrupts. Without interupts the heartbeat
+	 * checker won't activate any new partitions that may come up.
+	 */
+	free_irq(SGI_XPC_ACTIVATE, NULL);
+
+	/*
+	 * Cause the heartbeat checker and the discovery threads to exit.
+	 * We don't want them attempting to activate new partitions as we
+	 * try to deactivate the existing ones.
+	 */
+	xpc_exiting = 1;
+	wake_up_interruptible(&xpc_act_IRQ_wq);
+
+	/* wait for the heartbeat checker thread to mark itself inactive */
+	down(&xpc_hb_checker_exited);
+
+	/* wait for the discovery thread to mark itself inactive */
+	down(&xpc_discovery_exited);
+
+
+	set_current_state(TASK_INTERRUPTIBLE);
+	schedule_timeout(0.3 * HZ);
+	set_current_state(TASK_RUNNING);
+
+
+	/* wait for all partitions to become inactive */
+
+	do {
+		active_part_count = 0;
+
+		for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+			part = &xpc_partitions[partid];
+			if (part->act_state != XPC_P_INACTIVE) {
+				active_part_count++;
+
+				XPC_DEACTIVATE_PARTITION(part, xpcUnloading);
+			}
+		}
+
+		if (active_part_count) {
+			set_current_state(TASK_INTERRUPTIBLE);
+			schedule_timeout(0.3 * HZ);
+			set_current_state(TASK_RUNNING);
+		}
+
+	} while (active_part_count > 0);
+
+
+	/* close down protections for IPI operations */
+	xpc_restrict_IPI_ops();
+
+
+	/* clear the interface to XPC's functions */
+	xpc_clear_interface();
+
+	if (xpc_sysctl) {
+		unregister_sysctl_table(xpc_sysctl);
+	}
+}
+
+
+int __init
+xpc_init(void)
+{
+	int ret;
+	partid_t partid;
+	struct xpc_partition *part;
+	pid_t pid;
+
+
+	/*
+	 * xpc_remote_copy_buffer is used as a temporary buffer for bte_copy'ng
+	 * both a partition's reserved page and its XPC variables. Its size was
+	 * based on the size of a reserved page. So we need to ensure that the
+	 * XPC variables will fit as well.
+	 */
+	if (XPC_VARS_ALIGNED_SIZE > XPC_RSVD_PAGE_ALIGNED_SIZE) {
+		dev_err(xpc_part, "xpc_remote_copy_buffer is not big enough\n");
+		return -EPERM;
+	}
+	DBUG_ON((u64) xpc_remote_copy_buffer !=
+				L1_CACHE_ALIGN((u64) xpc_remote_copy_buffer));
+
+	snprintf(xpc_part->bus_id, BUS_ID_SIZE, "part");
+	snprintf(xpc_chan->bus_id, BUS_ID_SIZE, "chan");
+
+	xpc_sysctl = register_sysctl_table(xpc_sys_dir, 1);
+
+	/*
+	 * The first few fields of each entry of xpc_partitions[] need to
+	 * be initialized now so that calls to xpc_connect() and
+	 * xpc_disconnect() can be made prior to the activation of any remote
+	 * partition. NOTE THAT NONE OF THE OTHER FIELDS BELONGING TO THESE
+	 * ENTRIES ARE MEANINGFUL UNTIL AFTER AN ENTRY'S CORRESPONDING
+	 * PARTITION HAS BEEN ACTIVATED.
+	 */
+	for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+		part = &xpc_partitions[partid];
+
+		DBUG_ON((u64) part != L1_CACHE_ALIGN((u64) part));
+
+		part->act_IRQ_rcvd = 0;
+		spin_lock_init(&part->act_lock);
+		part->act_state = XPC_P_INACTIVE;
+		XPC_SET_REASON(part, 0, 0);
+		part->setup_state = XPC_P_UNSET;
+		init_waitqueue_head(&part->teardown_wq);
+		atomic_set(&part->references, 0);
+	}
+
+	/*
+	 * Open up protections for IPI operations (and AMO operations on
+	 * Shub 1.1 systems).
+	 */
+	xpc_allow_IPI_ops();
+
+	/*
+	 * Interrupts being processed will increment this atomic variable and
+	 * awaken the heartbeat thread which will process the interrupts.
+	 */
+	atomic_set(&xpc_act_IRQ_rcvd, 0);
+
+	/*
+	 * This is safe to do before the xpc_hb_checker thread has started
+	 * because the handler releases a wait queue.  If an interrupt is
+	 * received before the thread is waiting, it will not go to sleep,
+	 * but rather immediately process the interrupt.
+	 */
+	ret = request_irq(SGI_XPC_ACTIVATE, xpc_act_IRQ_handler, 0,
+							"xpc hb", NULL);
+	if (ret != 0) {
+		dev_err(xpc_part, "can't register ACTIVATE IRQ handler, "
+			"errno=%d\n", -ret);
+
+		xpc_restrict_IPI_ops();
+
+		if (xpc_sysctl) {
+			unregister_sysctl_table(xpc_sysctl);
+		}
+		return -EBUSY;
+	}
+
+	/*
+	 * Fill the partition reserved page with the information needed by
+	 * other partitions to discover we are alive and establish initial
+	 * communications.
+	 */
+	xpc_rsvd_page = xpc_rsvd_page_init();
+	if (xpc_rsvd_page == NULL) {
+		dev_err(xpc_part, "could not setup our reserved page\n");
+
+		free_irq(SGI_XPC_ACTIVATE, NULL);
+		xpc_restrict_IPI_ops();
+
+		if (xpc_sysctl) {
+			unregister_sysctl_table(xpc_sysctl);
+		}
+		return -EBUSY;
+	}
+
+
+	/*
+	 * Set the beating to other partitions into motion.  This is
+	 * the last requirement for other partitions' discovery to
+	 * initiate communications with us.
+	 */
+	init_timer(&xpc_hb_timer);
+	xpc_hb_timer.function = xpc_hb_beater;
+	xpc_hb_beater(0);
+
+
+	/*
+	 * The real work-horse behind xpc.  This processes incoming
+	 * interrupts and monitors remote heartbeats.
+	 */
+	pid = kernel_thread(xpc_hb_checker, NULL, 0);
+	if (pid < 0) {
+		dev_err(xpc_part, "failed while forking hb check thread\n");
+
+		/* indicate to others that our reserved page is uninitialized */
+		xpc_rsvd_page->vars_pa = 0;
+
+		del_timer_sync(&xpc_hb_timer);
+		free_irq(SGI_XPC_ACTIVATE, NULL);
+		xpc_restrict_IPI_ops();
+
+		if (xpc_sysctl) {
+			unregister_sysctl_table(xpc_sysctl);
+		}
+		return -EBUSY;
+	}
+
+
+	/*
+	 * Startup a thread that will attempt to discover other partitions to
+	 * activate based on info provided by SAL. This new thread is short
+	 * lived and will exit once discovery is complete.
+	 */
+	pid = kernel_thread(xpc_initiate_discovery, NULL, 0);
+	if (pid < 0) {
+		dev_err(xpc_part, "failed while forking discovery thread\n");
+
+		/* mark this new thread as a non-starter */
+		up(&xpc_discovery_exited);
+
+		xpc_do_exit();
+		return -EBUSY;
+	}
+
+
+	/* set the interface to point at XPC's functions */
+	xpc_set_interface(xpc_initiate_connect, xpc_initiate_disconnect,
+			  xpc_initiate_allocate, xpc_initiate_send,
+			  xpc_initiate_send_notify, xpc_initiate_received,
+			  xpc_initiate_partid_to_nasids);
+
+	return 0;
+}
+module_init(xpc_init);
+
+
+void __exit
+xpc_exit(void)
+{
+	xpc_do_exit();
+}
+module_exit(xpc_exit);
+
+
+MODULE_AUTHOR("Silicon Graphics, Inc.");
+MODULE_DESCRIPTION("Cross Partition Communication (XPC) support");
+MODULE_LICENSE("GPL");
+
+module_param(xpc_hb_interval, int, 0);
+MODULE_PARM_DESC(xpc_hb_interval, "Number of seconds between "
+		"heartbeat increments.");
+
+module_param(xpc_hb_check_interval, int, 0);
+MODULE_PARM_DESC(xpc_hb_check_interval, "Number of seconds between "
+		"heartbeat checks.");
+

arch/ia64/sn/kernel/xpc_partition.c

···
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2004-2005 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+
+
+/*
+ * Cross Partition Communication (XPC) partition support.
+ *
+ *	This is the part of XPC that detects the presence/absence of
+ *	other partitions. It provides a heartbeat and monitors the
+ *	heartbeats of other partitions.
+ *
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/sysctl.h>
+#include <linux/cache.h>
+#include <linux/mmzone.h>
+#include <linux/nodemask.h>
+#include <asm/sn/bte.h>
+#include <asm/sn/intr.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/sn/nodepda.h>
+#include <asm/sn/addrs.h>
+#include "xpc.h"
+
+
+/* XPC is exiting flag */
+int xpc_exiting;
+
+
+/* SH_IPI_ACCESS shub register value on startup */
+static u64 xpc_sh1_IPI_access;
+static u64 xpc_sh2_IPI_access0;
+static u64 xpc_sh2_IPI_access1;
+static u64 xpc_sh2_IPI_access2;
+static u64 xpc_sh2_IPI_access3;
+
+
+/* original protection values for each node */
+u64 xpc_prot_vec[MAX_COMPACT_NODES];
+
+
+/* this partition's reserved page */
+struct xpc_rsvd_page *xpc_rsvd_page;
+
+/* this partition's XPC variables (within the reserved page) */
+struct xpc_vars *xpc_vars;
+struct xpc_vars_part *xpc_vars_part;
+
+
+/*
+ * For performance reasons, each entry of xpc_partitions[] is cacheline
+ * aligned. And xpc_partitions[] is padded with an additional entry at the
+ * end so that the last legitimate entry doesn't share its cacheline with
+ * another variable.
+ */
+struct xpc_partition xpc_partitions[XP_MAX_PARTITIONS + 1];
+
+
+/*
+ * Generic buffer used to store a local copy of the remote partitions
+ * reserved page or XPC variables.
+ *
+ * xpc_discovery runs only once and is a seperate thread that is
+ * very likely going to be processing in parallel with receiving
+ * interrupts.
+ */
+char ____cacheline_aligned
+		xpc_remote_copy_buffer[XPC_RSVD_PAGE_ALIGNED_SIZE];
+
+
+/* systune related variables */
+int xpc_hb_interval = XPC_HB_DEFAULT_INTERVAL;
+int xpc_hb_check_interval = XPC_HB_CHECK_DEFAULT_TIMEOUT;
+
+
+/*
+ * Given a nasid, get the physical address of the  partition's reserved page
+ * for that nasid. This function returns 0 on any error.
+ */
+static u64
+xpc_get_rsvd_page_pa(int nasid, u64 buf, u64 buf_size)
+{
+	bte_result_t bte_res;
+	s64 status;
+	u64 cookie = 0;
+	u64 rp_pa = nasid;	/* seed with nasid */
+	u64 len = 0;
+
+
+	while (1) {
+
+		status = sn_partition_reserved_page_pa(buf, &cookie, &rp_pa,
+								&len);
+
+		dev_dbg(xpc_part, "SAL returned with status=%li, cookie="
+			"0x%016lx, address=0x%016lx, len=0x%016lx\n",
+			status, cookie, rp_pa, len);
+
+		if (status != SALRET_MORE_PASSES) {
+			break;
+		}
+
+		if (len > buf_size) {
+			dev_err(xpc_part, "len (=0x%016lx) > buf_size\n", len);
+			status = SALRET_ERROR;
+			break;
+		}
+
+		bte_res = xp_bte_copy(rp_pa, ia64_tpa(buf), buf_size,
+					(BTE_NOTIFY | BTE_WACQUIRE), NULL);
+		if (bte_res != BTE_SUCCESS) {
+			dev_dbg(xpc_part, "xp_bte_copy failed %i\n", bte_res);
+			status = SALRET_ERROR;
+			break;
+		}
+	}
+
+	if (status != SALRET_OK) {
+		rp_pa = 0;
+	}
+	dev_dbg(xpc_part, "reserved page at phys address 0x%016lx\n", rp_pa);
+	return rp_pa;
+}
+
+
+/*
+ * Fill the partition reserved page with the information needed by
+ * other partitions to discover we are alive and establish initial
+ * communications.
+ */
+struct xpc_rsvd_page *
+xpc_rsvd_page_init(void)
+{
+	struct xpc_rsvd_page *rp;
+	AMO_t *amos_page;
+	u64 rp_pa, next_cl, nasid_array = 0;
+	int i, ret;
+
+
+	/* get the local reserved page's address */
+
+	rp_pa = xpc_get_rsvd_page_pa(cnodeid_to_nasid(0),
+					(u64) xpc_remote_copy_buffer,
+						XPC_RSVD_PAGE_ALIGNED_SIZE);
+	if (rp_pa == 0) {
+		dev_err(xpc_part, "SAL failed to locate the reserved page\n");
+		return NULL;
+	}
+	rp = (struct xpc_rsvd_page *) __va(rp_pa);
+
+	if (rp->partid != sn_partition_id) {
+		dev_err(xpc_part, "the reserved page's partid of %d should be "
+			"%d\n", rp->partid, sn_partition_id);
+		return NULL;
+	}
+
+	rp->version = XPC_RP_VERSION;
+
+	/*
+	 * Place the XPC variables on the cache line following the
+	 * reserved page structure.
+	 */
+	next_cl = (u64) rp + XPC_RSVD_PAGE_ALIGNED_SIZE;
+	xpc_vars = (struct xpc_vars *) next_cl;
+
+	/*
+	 * Before clearing xpc_vars, see if a page of AMOs had been previously
+	 * allocated. If not we'll need to allocate one and set permissions
+	 * so that cross-partition AMOs are allowed.
+	 *
+	 * The allocated AMO page needs MCA reporting to remain disabled after
+	 * XPC has unloaded.  To make this work, we keep a copy of the pointer
+	 * to this page (i.e., amos_page) in the struct xpc_vars structure,
+	 * which is pointed to by the reserved page, and re-use that saved copy
+	 * on subsequent loads of XPC. This AMO page is never freed, and its
+	 * memory protections are never restricted.
+	 */
+	if ((amos_page = xpc_vars->amos_page) == NULL) {
+		amos_page = (AMO_t *) mspec_kalloc_page(0);
+		if (amos_page == NULL) {
+			dev_err(xpc_part, "can't allocate page of AMOs\n");
+			return NULL;
+		}
+
+		/*
+		 * Open up AMO-R/W to cpu.  This is done for Shub 1.1 systems
+		 * when xpc_allow_IPI_ops() is called via xpc_hb_init().
+		 */
+		if (!enable_shub_wars_1_1()) {
+			ret = sn_change_memprotect(ia64_tpa((u64) amos_page),
+					PAGE_SIZE, SN_MEMPROT_ACCESS_CLASS_1,
+					&nasid_array);
+			if (ret != 0) {
+				dev_err(xpc_part, "can't change memory "
+					"protections\n");
+				mspec_kfree_page((unsigned long) amos_page);
+				return NULL;
+			}
+		}
+	} else if (!IS_AMO_ADDRESS((u64) amos_page)) {
+		/*
+		 * EFI's XPBOOT can also set amos_page in the reserved page,
+		 * but it happens to leave it as an uncached physical address
+		 * and we need it to be an uncached virtual, so we'll have to
+		 * convert it.
+		 */
+		if (!IS_AMO_PHYS_ADDRESS((u64) amos_page)) {
+			dev_err(xpc_part, "previously used amos_page address "
+				"is bad = 0x%p\n", (void *) amos_page);
+			return NULL;
+		}
+		amos_page = (AMO_t *) TO_AMO((u64) amos_page);
+	}
+
+	memset(xpc_vars, 0, sizeof(struct xpc_vars));
+
+	/*
+	 * Place the XPC per partition specific variables on the cache line
+	 * following the XPC variables structure.
+	 */
+	next_cl += XPC_VARS_ALIGNED_SIZE;
+	memset((u64 *) next_cl, 0, sizeof(struct xpc_vars_part) *
+							XP_MAX_PARTITIONS);
+	xpc_vars_part = (struct xpc_vars_part *) next_cl;
+	xpc_vars->vars_part_pa = __pa(next_cl);
+
+	xpc_vars->version = XPC_V_VERSION;
+	xpc_vars->act_nasid = cpuid_to_nasid(0);
+	xpc_vars->act_phys_cpuid = cpu_physical_id(0);
+	xpc_vars->amos_page = amos_page;  /* save for next load of XPC */
+
+
+	/*
+	 * Initialize the activation related AMO variables.
+	 */
+	xpc_vars->act_amos = xpc_IPI_init(XP_MAX_PARTITIONS);
+	for (i = 1; i < XP_NASID_MASK_WORDS; i++) {
+		xpc_IPI_init(i + XP_MAX_PARTITIONS);
+	}
+	/* export AMO page's physical address to other partitions */
+	xpc_vars->amos_page_pa = ia64_tpa((u64) xpc_vars->amos_page);
+
+	/*
+	 * This signifies to the remote partition that our reserved
+	 * page is initialized.
+	 */
+	(volatile u64) rp->vars_pa = __pa(xpc_vars);
+
+	return rp;
+}
+
+
+/*
+ * Change protections to allow IPI operations (and AMO operations on
+ * Shub 1.1 systems).
+ */
+void
+xpc_allow_IPI_ops(void)
+{
+	int node;
+	int nasid;
+
+
+	// >>> Change SH_IPI_ACCESS code to use SAL call once it is available.
+
+	if (is_shub2()) {
+		xpc_sh2_IPI_access0 =
+			(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS0));
+		xpc_sh2_IPI_access1 =
+			(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS1));
+		xpc_sh2_IPI_access2 =
+			(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS2));
+		xpc_sh2_IPI_access3 =
+			(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS3));
+
+		for_each_online_node(node) {
+			nasid = cnodeid_to_nasid(node);
+			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
+								-1UL);
+			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
+								-1UL);
+			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
+								-1UL);
+			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
+								-1UL);
+		}
+
+	} else {
+		xpc_sh1_IPI_access =
+			(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH1_IPI_ACCESS));
+
+		for_each_online_node(node) {
+			nasid = cnodeid_to_nasid(node);
+			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
+								-1UL);
+
+			/*
+			 * Since the BIST collides with memory operations on
+			 * SHUB 1.1 sn_change_memprotect() cannot be used.
+			 */
+			if (enable_shub_wars_1_1()) {
+				/* open up everything */
+				xpc_prot_vec[node] = (u64) HUB_L((u64 *)
+						GLOBAL_MMR_ADDR(nasid,
+						SH1_MD_DQLP_MMR_DIR_PRIVEC0));
+				HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
+						SH1_MD_DQLP_MMR_DIR_PRIVEC0),
+								-1UL);
+				HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
+						SH1_MD_DQRP_MMR_DIR_PRIVEC0),
+								-1UL);
+			}
+		}
+	}
+}
+
+
+/*
+ * Restrict protections to disallow IPI operations (and AMO operations on
+ * Shub 1.1 systems).
+ */
+void
+xpc_restrict_IPI_ops(void)
+{
+	int node;
+	int nasid;
+
+
+	// >>> Change SH_IPI_ACCESS code to use SAL call once it is available.
+
+	if (is_shub2()) {
+
+		for_each_online_node(node) {
+			nasid = cnodeid_to_nasid(node);
+			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
+							xpc_sh2_IPI_access0);
+			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
+							xpc_sh2_IPI_access1);
+			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
+							xpc_sh2_IPI_access2);
+			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
+							xpc_sh2_IPI_access3);
+		}
+
+	} else {
+
+		for_each_online_node(node) {
+			nasid = cnodeid_to_nasid(node);
+			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
+							xpc_sh1_IPI_access);
+
+			if (enable_shub_wars_1_1()) {
+				HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
+						SH1_MD_DQLP_MMR_DIR_PRIVEC0),
+							xpc_prot_vec[node]);
+				HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
+						SH1_MD_DQRP_MMR_DIR_PRIVEC0),
+							xpc_prot_vec[node]);
+			}
+		}
+	}
+}
+
+
+/*
+ * At periodic intervals, scan through all active partitions and ensure
+ * their heartbeat is still active.  If not, the partition is deactivated.
+ */
+void
+xpc_check_remote_hb(void)
+{
+	struct xpc_vars *remote_vars;
+	struct xpc_partition *part;
+	partid_t partid;
+	bte_result_t bres;
+
+
+	remote_vars = (struct xpc_vars *) xpc_remote_copy_buffer;
+
+	for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+		if (partid == sn_partition_id) {
+			continue;
+		}
+
+		part = &xpc_partitions[partid];
+
+		if (part->act_state == XPC_P_INACTIVE ||
+				part->act_state == XPC_P_DEACTIVATING) {
+			continue;
+		}
+
+		/* pull the remote_hb cache line */
+		bres = xp_bte_copy(part->remote_vars_pa,
+					ia64_tpa((u64) remote_vars),
+					XPC_VARS_ALIGNED_SIZE,
+					(BTE_NOTIFY | BTE_WACQUIRE), NULL);
+		if (bres != BTE_SUCCESS) {
+			XPC_DEACTIVATE_PARTITION(part,
+						xpc_map_bte_errors(bres));
+			continue;
+		}
+
+		dev_dbg(xpc_part, "partid = %d, heartbeat = %ld, last_heartbeat"
+			" = %ld, kdb_status = %ld, HB_mask = 0x%lx\n", partid,
+			remote_vars->heartbeat, part->last_heartbeat,
+			remote_vars->kdb_status,
+			remote_vars->heartbeating_to_mask);
+
+		if (((remote_vars->heartbeat == part->last_heartbeat) &&
+			(remote_vars->kdb_status == 0)) ||
+			     !XPC_HB_ALLOWED(sn_partition_id, remote_vars)) {
+
+			XPC_DEACTIVATE_PARTITION(part, xpcNoHeartbeat);
+			continue;
+		}
+
+		part->last_heartbeat = remote_vars->heartbeat;
+	}
+}
+
+
+/*
+ * Get a copy of the remote partition's rsvd page.
+ *
+ * remote_rp points to a buffer that is cacheline aligned for BTE copies and
+ * assumed to be of size XPC_RSVD_PAGE_ALIGNED_SIZE.
+ */
+static enum xpc_retval
+xpc_get_remote_rp(int nasid, u64 *discovered_nasids,
+		struct xpc_rsvd_page *remote_rp, u64 *remote_rsvd_page_pa)
+{
+	int bres, i;
+
+
+	/* get the reserved page's physical address */
+
+	*remote_rsvd_page_pa = xpc_get_rsvd_page_pa(nasid, (u64) remote_rp,
+						XPC_RSVD_PAGE_ALIGNED_SIZE);
+	if (*remote_rsvd_page_pa == 0) {
+		return xpcNoRsvdPageAddr;
+	}
+
+
+	/* pull over the reserved page structure */
+
+	bres = xp_bte_copy(*remote_rsvd_page_pa, ia64_tpa((u64) remote_rp),
+				XPC_RSVD_PAGE_ALIGNED_SIZE,
+				(BTE_NOTIFY | BTE_WACQUIRE), NULL);
+	if (bres != BTE_SUCCESS) {
+		return xpc_map_bte_errors(bres);
+	}
+
+
+	if (discovered_nasids != NULL) {
+		for (i = 0; i < XP_NASID_MASK_WORDS; i++) {
+			discovered_nasids[i] |= remote_rp->part_nasids[i];
+		}
+	}
+
+
+	/* check that the partid is for another partition */
+
+	if (remote_rp->partid < 1 ||
+				remote_rp->partid > (XP_MAX_PARTITIONS - 1)) {
+		return xpcInvalidPartid;
+	}
+
+	if (remote_rp->partid == sn_partition_id) {
+		return xpcLocalPartid;
+	}
+
+
+	if (XPC_VERSION_MAJOR(remote_rp->version) !=
+					XPC_VERSION_MAJOR(XPC_RP_VERSION)) {
+		return xpcBadVersion;
+	}
+
+	return xpcSuccess;
+}
+
+
+/*
+ * Get a copy of the remote partition's XPC variables.
+ *
+ * remote_vars points to a buffer that is cacheline aligned for BTE copies and
+ * assumed to be of size XPC_VARS_ALIGNED_SIZE.
+ */
+static enum xpc_retval
+xpc_get_remote_vars(u64 remote_vars_pa, struct xpc_vars *remote_vars)
+{
+	int bres;
+
+
+	if (remote_vars_pa == 0) {
+		return xpcVarsNotSet;
+	}
+
+
+	/* pull over the cross partition variables */
+
+	bres = xp_bte_copy(remote_vars_pa, ia64_tpa((u64) remote_vars),
+				XPC_VARS_ALIGNED_SIZE,
+				(BTE_NOTIFY | BTE_WACQUIRE), NULL);
+	if (bres != BTE_SUCCESS) {
+		return xpc_map_bte_errors(bres);
+	}
+
+	if (XPC_VERSION_MAJOR(remote_vars->version) !=
+					XPC_VERSION_MAJOR(XPC_V_VERSION)) {
+		return xpcBadVersion;
+	}
+
+	return xpcSuccess;
+}
+
+
+/*
+ * Prior code has determine the nasid which generated an IPI.  Inspect
+ * that nasid to determine if its partition needs to be activated or
+ * deactivated.
+ *
+ * A partition is consider "awaiting activation" if our partition
+ * flags indicate it is not active and it has a heartbeat.  A
+ * partition is considered "awaiting deactivation" if our partition
+ * flags indicate it is active but it has no heartbeat or it is not
+ * sending its heartbeat to us.
+ *
+ * To determine the heartbeat, the remote nasid must have a properly
+ * initialized reserved page.
+ */
+static void
+xpc_identify_act_IRQ_req(int nasid)
+{
+	struct xpc_rsvd_page *remote_rp;
+	struct xpc_vars *remote_vars;
+	u64 remote_rsvd_page_pa;
+	u64 remote_vars_pa;
+	partid_t partid;
+	struct xpc_partition *part;
+	enum xpc_retval ret;
+
+
+	/* pull over the reserved page structure */
+
+	remote_rp = (struct xpc_rsvd_page *) xpc_remote_copy_buffer;
+
+	ret = xpc_get_remote_rp(nasid, NULL, remote_rp, &remote_rsvd_page_pa);
+	if (ret != xpcSuccess) {
+		dev_warn(xpc_part, "unable to get reserved page from nasid %d, "
+			"which sent interrupt, reason=%d\n", nasid, ret);
+		return;
+	}
+
+	remote_vars_pa = remote_rp->vars_pa;
+	partid = remote_rp->partid;
+	part = &xpc_partitions[partid];
+
+
+	/* pull over the cross partition variables */
+
+	remote_vars = (struct xpc_vars *) xpc_remote_copy_buffer;
+
+	ret = xpc_get_remote_vars(remote_vars_pa, remote_vars);
+	if (ret != xpcSuccess) {
+
+		dev_warn(xpc_part, "unable to get XPC variables from nasid %d, "
+			"which sent interrupt, reason=%d\n", nasid, ret);
+
+		XPC_DEACTIVATE_PARTITION(part, ret);
+		return;
+	}
+
+
+	part->act_IRQ_rcvd++;
+
+	dev_dbg(xpc_part, "partid for nasid %d is %d; IRQs = %d; HB = "
+		"%ld:0x%lx\n", (int) nasid, (int) partid, part->act_IRQ_rcvd,
+		remote_vars->heartbeat, remote_vars->heartbeating_to_mask);
+
+
+	if (part->act_state == XPC_P_INACTIVE) {
+
+		part->remote_rp_pa = remote_rsvd_page_pa;
+		dev_dbg(xpc_part, "  remote_rp_pa = 0x%016lx\n",
+			part->remote_rp_pa);
+
+		part->remote_vars_pa = remote_vars_pa;
+		dev_dbg(xpc_part, "  remote_vars_pa = 0x%016lx\n",
+			part->remote_vars_pa);
+
+		part->last_heartbeat = remote_vars->heartbeat;
+		dev_dbg(xpc_part, "  last_heartbeat = 0x%016lx\n",
+			part->last_heartbeat);
+
+		part->remote_vars_part_pa = remote_vars->vars_part_pa;
+		dev_dbg(xpc_part, "  remote_vars_part_pa = 0x%016lx\n",
+			part->remote_vars_part_pa);
+
+		part->remote_act_nasid = remote_vars->act_nasid;
+		dev_dbg(xpc_part, "  remote_act_nasid = 0x%x\n",
+			part->remote_act_nasid);
+
+		part->remote_act_phys_cpuid = remote_vars->act_phys_cpuid;
+		dev_dbg(xpc_part, "  remote_act_phys_cpuid = 0x%x\n",
+			part->remote_act_phys_cpuid);
+
+		part->remote_amos_page_pa = remote_vars->amos_page_pa;
+		dev_dbg(xpc_part, "  remote_amos_page_pa = 0x%lx\n",
+			part->remote_amos_page_pa);
+
+		xpc_activate_partition(part);
+
+	} else if (part->remote_amos_page_pa != remote_vars->amos_page_pa ||
+			!XPC_HB_ALLOWED(sn_partition_id, remote_vars)) {
+
+		part->reactivate_nasid = nasid;
+		XPC_DEACTIVATE_PARTITION(part, xpcReactivating);
+	}
+}
+
+
+/*
+ * Loop through the activation AMO variables and process any bits
+ * which are set.  Each bit indicates a nasid sending a partition
+ * activation or deactivation request.
+ *
+ * Return #of IRQs detected.
+ */
+int
+xpc_identify_act_IRQ_sender(void)
+{
+	int word, bit;
+	u64 nasid_mask;
+	u64 nasid;			/* remote nasid */
+	int n_IRQs_detected = 0;
+	AMO_t *act_amos;
+	struct xpc_rsvd_page *rp = (struct xpc_rsvd_page *) xpc_rsvd_page;
+
+
+	act_amos = xpc_vars->act_amos;
+
+
+	/* scan through act AMO variable looking for non-zero entries */
+	for (word = 0; word < XP_NASID_MASK_WORDS; word++) {
+
+		nasid_mask = xpc_IPI_receive(&act_amos[word]);
+		if (nasid_mask == 0) {
+			/* no IRQs from nasids in this variable */
+			continue;
+		}
+
+		dev_dbg(xpc_part, "AMO[%d] gave back 0x%lx\n", word,
+			nasid_mask);
+
+
+		/*
+		 * If this nasid has been added to the machine since
+		 * our partition was reset, this will retain the
+		 * remote nasid in our reserved pages machine mask.
+		 * This is used in the event of module reload.
+		 */
+		rp->mach_nasids[word] |= nasid_mask;
+
+
+		/* locate the nasid(s) which sent interrupts */
+
+		for (bit = 0; bit < (8 * sizeof(u64)); bit++) {
+			if (nasid_mask & (1UL << bit)) {
+				n_IRQs_detected++;
+				nasid = XPC_NASID_FROM_W_B(word, bit);
+				dev_dbg(xpc_part, "interrupt from nasid %ld\n",
+					nasid);
+				xpc_identify_act_IRQ_req(nasid);
+			}
+		}
+	}
+	return n_IRQs_detected;
+}
+
+
+/*
+ * Mark specified partition as active.
+ */
+enum xpc_retval
+xpc_mark_partition_active(struct xpc_partition *part)
+{
+	unsigned long irq_flags;
+	enum xpc_retval ret;
+
+
+	dev_dbg(xpc_part, "setting partition %d to ACTIVE\n", XPC_PARTID(part));
+
+	spin_lock_irqsave(&part->act_lock, irq_flags);
+	if (part->act_state == XPC_P_ACTIVATING) {
+		part->act_state = XPC_P_ACTIVE;
+		ret = xpcSuccess;
+	} else {
+		DBUG_ON(part->reason == xpcSuccess);
+		ret = part->reason;
+	}
+	spin_unlock_irqrestore(&part->act_lock, irq_flags);
+
+	return ret;
+}
+
+
+/*
+ * Notify XPC that the partition is down.
+ */
+void
+xpc_deactivate_partition(const int line, struct xpc_partition *part,
+				enum xpc_retval reason)
+{
+	unsigned long irq_flags;
+	partid_t partid = XPC_PARTID(part);
+
+
+	spin_lock_irqsave(&part->act_lock, irq_flags);
+
+	if (part->act_state == XPC_P_INACTIVE) {
+		XPC_SET_REASON(part, reason, line);
+		spin_unlock_irqrestore(&part->act_lock, irq_flags);
+		if (reason == xpcReactivating) {
+			/* we interrupt ourselves to reactivate partition */
+			xpc_IPI_send_reactivate(part);
+		}
+		return;
+	}
+	if (part->act_state == XPC_P_DEACTIVATING) {
+		if ((part->reason == xpcUnloading && reason != xpcUnloading) ||
+					reason == xpcReactivating) {
+			XPC_SET_REASON(part, reason, line);
+		}
+		spin_unlock_irqrestore(&part->act_lock, irq_flags);
+		return;
+	}
+
+	part->act_state = XPC_P_DEACTIVATING;
+	XPC_SET_REASON(part, reason, line);
+
+	spin_unlock_irqrestore(&part->act_lock, irq_flags);
+
+	XPC_DISALLOW_HB(partid, xpc_vars);
+
+	dev_dbg(xpc_part, "bringing partition %d down, reason = %d\n", partid,
+		reason);
+
+	xpc_partition_down(part, reason);
+}
+
+
+/*
+ * Mark specified partition as active.
+ */
+void
+xpc_mark_partition_inactive(struct xpc_partition *part)
+{
+	unsigned long irq_flags;
+
+
+	dev_dbg(xpc_part, "setting partition %d to INACTIVE\n",
+		XPC_PARTID(part));
+
+	spin_lock_irqsave(&part->act_lock, irq_flags);
+	part->act_state = XPC_P_INACTIVE;
+	spin_unlock_irqrestore(&part->act_lock, irq_flags);
+	part->remote_rp_pa = 0;
+}
+
+
+/*
+ * SAL has provided a partition and machine mask.  The partition mask
+ * contains a bit for each even nasid in our partition.  The machine
+ * mask contains a bit for each even nasid in the entire machine.
+ *
+ * Using those two bit arrays, we can determine which nasids are
+ * known in the machine.  Each should also have a reserved page
+ * initialized if they are available for partitioning.
+ */
+void
+xpc_discovery(void)
+{
+	void *remote_rp_base;
+	struct xpc_rsvd_page *remote_rp;
+	struct xpc_vars *remote_vars;
+	u64 remote_rsvd_page_pa;
+	u64 remote_vars_pa;
+	int region;
+	int max_regions;
+	int nasid;
+	struct xpc_rsvd_page *rp;
+	partid_t partid;
+	struct xpc_partition *part;
+	u64 *discovered_nasids;
+	enum xpc_retval ret;
+
+
+	remote_rp = xpc_kmalloc_cacheline_aligned(XPC_RSVD_PAGE_ALIGNED_SIZE,
+						GFP_KERNEL, &remote_rp_base);
+	if (remote_rp == NULL) {
+		return;
+	}
+	remote_vars = (struct xpc_vars *) remote_rp;
+
+
+	discovered_nasids = kmalloc(sizeof(u64) * XP_NASID_MASK_WORDS,
+							GFP_KERNEL);
+	if (discovered_nasids == NULL) {
+		kfree(remote_rp_base);
+		return;
+	}
+	memset(discovered_nasids, 0, sizeof(u64) * XP_NASID_MASK_WORDS);
+
+	rp = (struct xpc_rsvd_page *) xpc_rsvd_page;
+
+	/*
+	 * The term 'region' in this context refers to the minimum number of
+	 * nodes that can comprise an access protection grouping. The access
+	 * protection is in regards to memory, IOI and IPI.
+	 */
+//>>> move the next two #defines into either include/asm-ia64/sn/arch.h or
+//>>> include/asm-ia64/sn/addrs.h
+#define SH1_MAX_REGIONS		64
+#define SH2_MAX_REGIONS		256
+	max_regions = is_shub2() ? SH2_MAX_REGIONS : SH1_MAX_REGIONS;
+
+	for (region = 0; region < max_regions; region++) {
+
+		if ((volatile int) xpc_exiting) {
+			break;
+		}
+
+		dev_dbg(xpc_part, "searching region %d\n", region);
+
+		for (nasid = (region * sn_region_size * 2);
+		     nasid < ((region + 1) * sn_region_size * 2);
+		     nasid += 2) {
+
+			if ((volatile int) xpc_exiting) {
+				break;
+			}
+
+			dev_dbg(xpc_part, "checking nasid %d\n", nasid);
+
+
+			if (XPC_NASID_IN_ARRAY(nasid, rp->part_nasids)) {
+				dev_dbg(xpc_part, "PROM indicates Nasid %d is "
+					"part of the local partition; skipping "
+					"region\n", nasid);
+				break;
+			}
+
+			if (!(XPC_NASID_IN_ARRAY(nasid, rp->mach_nasids))) {
+				dev_dbg(xpc_part, "PROM indicates Nasid %d was "
+					"not on Numa-Link network at reset\n",
+					nasid);
+				continue;
+			}
+
+			if (XPC_NASID_IN_ARRAY(nasid, discovered_nasids)) {
+				dev_dbg(xpc_part, "Nasid %d is part of a "
+					"partition which was previously "
+					"discovered\n", nasid);
+				continue;
+			}
+
+
+			/* pull over the reserved page structure */
+
+			ret = xpc_get_remote_rp(nasid, discovered_nasids,
+					      remote_rp, &remote_rsvd_page_pa);
+			if (ret != xpcSuccess) {
+				dev_dbg(xpc_part, "unable to get reserved page "
+					"from nasid %d, reason=%d\n", nasid,
+					ret);
+
+				if (ret == xpcLocalPartid) {
+					break;
+				}
+				continue;
+			}
+
+			remote_vars_pa = remote_rp->vars_pa;
+
+			partid = remote_rp->partid;
+			part = &xpc_partitions[partid];
+
+
+			/* pull over the cross partition variables */
+
+			ret = xpc_get_remote_vars(remote_vars_pa, remote_vars);
+			if (ret != xpcSuccess) {
+				dev_dbg(xpc_part, "unable to get XPC variables "
+					"from nasid %d, reason=%d\n", nasid,
+					ret);
+
+				XPC_DEACTIVATE_PARTITION(part, ret);
+				continue;
+			}
+
+			if (part->act_state != XPC_P_INACTIVE) {
+				dev_dbg(xpc_part, "partition %d on nasid %d is "
+					"already activating\n", partid, nasid);
+				break;
+			}
+
+			/*
+			 * Register the remote partition's AMOs with SAL so it
+			 * can handle and cleanup errors within that address
+			 * range should the remote partition go down. We don't
+			 * unregister this range because it is difficult to
+			 * tell when outstanding writes to the remote partition
+			 * are finished and thus when it is thus safe to
+			 * unregister. This should not result in wasted space
+			 * in the SAL xp_addr_region table because we should
+			 * get the same page for remote_act_amos_pa after
+			 * module reloads and system reboots.
+			 */
+			if (sn_register_xp_addr_region(
+					    remote_vars->amos_page_pa,
+							PAGE_SIZE, 1) < 0) {
+				dev_dbg(xpc_part, "partition %d failed to "
+					"register xp_addr region 0x%016lx\n",
+					partid, remote_vars->amos_page_pa);
+
+				XPC_SET_REASON(part, xpcPhysAddrRegFailed,
+						__LINE__);
+				break;
+			}
+
+			/*
+			 * The remote nasid is valid and available.
+			 * Send an interrupt to that nasid to notify
+			 * it that we are ready to begin activation.
+			 */
+			dev_dbg(xpc_part, "sending an interrupt to AMO 0x%lx, "
+				"nasid %d, phys_cpuid 0x%x\n",
+				remote_vars->amos_page_pa,
+				remote_vars->act_nasid,
+				remote_vars->act_phys_cpuid);
+
+			xpc_IPI_send_activate(remote_vars);
+		}
+	}
+
+	kfree(discovered_nasids);
+	kfree(remote_rp_base);
+}
+
+
+/*
+ * Given a partid, get the nasids owned by that partition from the
+ * remote partition's reserved page.
+ */
+enum xpc_retval
+xpc_initiate_partid_to_nasids(partid_t partid, void *nasid_mask)
+{
+	struct xpc_partition *part;
+	u64 part_nasid_pa;
+	int bte_res;
+
+
+	part = &xpc_partitions[partid];
+	if (part->remote_rp_pa == 0) {
+		return xpcPartitionDown;
+	}
+
+	part_nasid_pa = part->remote_rp_pa +
+		(u64) &((struct xpc_rsvd_page *) 0)->part_nasids;
+
+	bte_res = xp_bte_copy(part_nasid_pa, ia64_tpa((u64) nasid_mask),
+				L1_CACHE_ALIGN(XP_NASID_MASK_BYTES),
+				(BTE_NOTIFY | BTE_WACQUIRE), NULL);
+
+	return xpc_map_bte_errors(bte_res);
+}
+

arch/ia64/sn/kernel/xpnet.c

···
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1999,2001-2005 Silicon Graphics, Inc. All rights reserved.
+ */
+
+
+/*
+ * Cross Partition Network Interface (XPNET) support
+ *
+ *	XPNET provides a virtual network layered on top of the Cross
+ *	Partition communication layer.
+ *
+ *	XPNET provides direct point-to-point and broadcast-like support
+ *	for an ethernet-like device.  The ethernet broadcast medium is
+ *	replaced with a point-to-point message structure which passes
+ *	pointers to a DMA-capable block that a remote partition should
+ *	retrieve and pass to the upper level networking layer.
+ *
+ */
+
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/delay.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+#include <linux/smp.h>
+#include <linux/string.h>
+#include <asm/sn/bte.h>
+#include <asm/sn/io.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/types.h>
+#include <asm/atomic.h>
+#include <asm/sn/xp.h>
+
+
+/*
+ * The message payload transferred by XPC.
+ *
+ * buf_pa is the physical address where the DMA should pull from.
+ *
+ * NOTE: for performance reasons, buf_pa should _ALWAYS_ begin on a
+ * cacheline boundary.  To accomplish this, we record the number of
+ * bytes from the beginning of the first cacheline to the first useful
+ * byte of the skb (leadin_ignore) and the number of bytes from the
+ * last useful byte of the skb to the end of the last cacheline
+ * (tailout_ignore).
+ *
+ * size is the number of bytes to transfer which includes the skb->len
+ * (useful bytes of the senders skb) plus the leadin and tailout
+ */
+struct xpnet_message {
+	u16 version;		/* Version for this message */
+	u16 embedded_bytes;	/* #of bytes embedded in XPC message */
+	u32 magic;		/* Special number indicating this is xpnet */
+	u64 buf_pa;		/* phys address of buffer to retrieve */
+	u32 size;		/* #of bytes in buffer */
+	u8 leadin_ignore;	/* #of bytes to ignore at the beginning */
+	u8 tailout_ignore;	/* #of bytes to ignore at the end */
+	unsigned char data;	/* body of small packets */
+};
+
+/*
+ * Determine the size of our message, the cacheline aligned size,
+ * and then the number of message will request from XPC.
+ *
+ * XPC expects each message to exist in an individual cacheline.
+ */
+#define XPNET_MSG_SIZE		(L1_CACHE_BYTES - XPC_MSG_PAYLOAD_OFFSET)
+#define XPNET_MSG_DATA_MAX	\
+		(XPNET_MSG_SIZE - (u64)(&((struct xpnet_message *)0)->data))
+#define XPNET_MSG_ALIGNED_SIZE	(L1_CACHE_ALIGN(XPNET_MSG_SIZE))
+#define XPNET_MSG_NENTRIES	(PAGE_SIZE / XPNET_MSG_ALIGNED_SIZE)
+
+
+#define XPNET_MAX_KTHREADS	(XPNET_MSG_NENTRIES + 1)
+#define XPNET_MAX_IDLE_KTHREADS	(XPNET_MSG_NENTRIES + 1)
+
+/*
+ * Version number of XPNET implementation. XPNET can always talk to versions
+ * with same major #, and never talk to versions with a different version.
+ */
+#define _XPNET_VERSION(_major, _minor)	(((_major) << 4) | (_minor))
+#define XPNET_VERSION_MAJOR(_v)		((_v) >> 4)
+#define XPNET_VERSION_MINOR(_v)		((_v) & 0xf)
+
+#define	XPNET_VERSION _XPNET_VERSION(1,0)		/* version 1.0 */
+#define	XPNET_VERSION_EMBED _XPNET_VERSION(1,1)		/* version 1.1 */
+#define XPNET_MAGIC	0x88786984 /* "XNET" */
+
+#define XPNET_VALID_MSG(_m)						     \
+   ((XPNET_VERSION_MAJOR(_m->version) == XPNET_VERSION_MAJOR(XPNET_VERSION)) \
+    && (msg->magic == XPNET_MAGIC))
+
+#define XPNET_DEVICE_NAME		"xp0"
+
+
+/*
+ * When messages are queued with xpc_send_notify, a kmalloc'd buffer
+ * of the following type is passed as a notification cookie.  When the
+ * notification function is called, we use the cookie to decide
+ * whether all outstanding message sends have completed.  The skb can
+ * then be released.
+ */
+struct xpnet_pending_msg {
+	struct list_head free_list;
+	struct sk_buff *skb;
+	atomic_t use_count;
+};
+
+/* driver specific structure pointed to by the device structure */
+struct xpnet_dev_private {
+	struct net_device_stats stats;
+};
+
+struct net_device *xpnet_device;
+
+/*
+ * When we are notified of other partitions activating, we add them to
+ * our bitmask of partitions to which we broadcast.
+ */
+static u64 xpnet_broadcast_partitions;
+/* protect above */
+static spinlock_t xpnet_broadcast_lock = SPIN_LOCK_UNLOCKED;
+
+/*
+ * Since the Block Transfer Engine (BTE) is being used for the transfer
+ * and it relies upon cache-line size transfers, we need to reserve at
+ * least one cache-line for head and tail alignment.  The BTE is
+ * limited to 8MB transfers.
+ *
+ * Testing has shown that changing MTU to greater than 64KB has no effect
+ * on TCP as the two sides negotiate a Max Segment Size that is limited
+ * to 64K.  Other protocols May use packets greater than this, but for
+ * now, the default is 64KB.
+ */
+#define XPNET_MAX_MTU (0x800000UL - L1_CACHE_BYTES)
+/* 32KB has been determined to be the ideal */
+#define XPNET_DEF_MTU (0x8000UL)
+
+
+/*
+ * The partition id is encapsulated in the MAC address.  The following
+ * define locates the octet the partid is in.
+ */
+#define XPNET_PARTID_OCTET	1
+#define XPNET_LICENSE_OCTET	2
+
+
+/*
+ * Define the XPNET debug device structure that is to be used with dev_dbg(),
+ * dev_err(), dev_warn(), and dev_info().
+ */
+struct device_driver xpnet_dbg_name = {
+	.name = "xpnet"
+};
+
+struct device xpnet_dbg_subname = {
+	.bus_id = {0},			/* set to "" */
+	.driver = &xpnet_dbg_name
+};
+
+struct device *xpnet = &xpnet_dbg_subname;
+
+/*
+ * Packet was recevied by XPC and forwarded to us.
+ */
+static void
+xpnet_receive(partid_t partid, int channel, struct xpnet_message *msg)
+{
+	struct sk_buff *skb;
+	bte_result_t bret;
+	struct xpnet_dev_private *priv =
+		(struct xpnet_dev_private *) xpnet_device->priv;
+
+
+	if (!XPNET_VALID_MSG(msg)) {
+		/*
+		 * Packet with a different XPC version.  Ignore.
+		 */
+		xpc_received(partid, channel, (void *) msg);
+
+		priv->stats.rx_errors++;
+
+		return;
+	}
+	dev_dbg(xpnet, "received 0x%lx, %d, %d, %d\n", msg->buf_pa, msg->size,
+		msg->leadin_ignore, msg->tailout_ignore);
+
+
+	/* reserve an extra cache line */
+	skb = dev_alloc_skb(msg->size + L1_CACHE_BYTES);
+	if (!skb) {
+		dev_err(xpnet, "failed on dev_alloc_skb(%d)\n",
+			msg->size + L1_CACHE_BYTES);
+
+		xpc_received(partid, channel, (void *) msg);
+
+		priv->stats.rx_errors++;
+
+		return;
+	}
+
+	/*
+	 * The allocated skb has some reserved space.
+	 * In order to use bte_copy, we need to get the
+	 * skb->data pointer moved forward.
+	 */
+	skb_reserve(skb, (L1_CACHE_BYTES - ((u64)skb->data &
+					    (L1_CACHE_BYTES - 1)) +
+			  msg->leadin_ignore));
+
+	/*
+	 * Update the tail pointer to indicate data actually
+	 * transferred.
+	 */
+	skb_put(skb, (msg->size - msg->leadin_ignore - msg->tailout_ignore));
+
+	/*
+	 * Move the data over from the the other side.
+	 */
+	if ((XPNET_VERSION_MINOR(msg->version) == 1) &&
+						(msg->embedded_bytes != 0)) {
+		dev_dbg(xpnet, "copying embedded message. memcpy(0x%p, 0x%p, "
+			"%lu)\n", skb->data, &msg->data,
+			(size_t) msg->embedded_bytes);
+
+		memcpy(skb->data, &msg->data, (size_t) msg->embedded_bytes);
+	} else {
+		dev_dbg(xpnet, "transferring buffer to the skb->data area;\n\t"
+			"bte_copy(0x%p, 0x%p, %hu)\n", (void *)msg->buf_pa,
+			(void *)__pa((u64)skb->data & ~(L1_CACHE_BYTES - 1)),
+			msg->size);
+
+		bret = bte_copy(msg->buf_pa,
+				__pa((u64)skb->data & ~(L1_CACHE_BYTES - 1)),
+				msg->size, (BTE_NOTIFY | BTE_WACQUIRE), NULL);
+
+		if (bret != BTE_SUCCESS) {
+			// >>> Need better way of cleaning skb.  Currently skb
+			// >>> appears in_use and we can't just call
+			// >>> dev_kfree_skb.
+			dev_err(xpnet, "bte_copy(0x%p, 0x%p, 0x%hx) returned "
+				"error=0x%x\n", (void *)msg->buf_pa,
+				(void *)__pa((u64)skb->data &
+							~(L1_CACHE_BYTES - 1)),
+				msg->size, bret);
+
+			xpc_received(partid, channel, (void *) msg);
+
+			priv->stats.rx_errors++;
+
+			return;
+		}
+	}
+
+	dev_dbg(xpnet, "<skb->head=0x%p skb->data=0x%p skb->tail=0x%p "
+		"skb->end=0x%p skb->len=%d\n", (void *) skb->head,
+		(void *) skb->data, (void *) skb->tail, (void *) skb->end,
+		skb->len);
+
+	skb->dev = xpnet_device;
+	skb->protocol = eth_type_trans(skb, xpnet_device);
+	skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+	dev_dbg(xpnet, "passing skb to network layer; \n\tskb->head=0x%p "
+		"skb->data=0x%p skb->tail=0x%p skb->end=0x%p skb->len=%d\n",
+		(void *) skb->head, (void *) skb->data, (void *) skb->tail,
+		(void *) skb->end, skb->len);
+
+
+	xpnet_device->last_rx = jiffies;
+	priv->stats.rx_packets++;
+	priv->stats.rx_bytes += skb->len + ETH_HLEN;
+
+	netif_rx_ni(skb);
+	xpc_received(partid, channel, (void *) msg);
+}
+
+
+/*
+ * This is the handler which XPC calls during any sort of change in
+ * state or message reception on a connection.
+ */
+static void
+xpnet_connection_activity(enum xpc_retval reason, partid_t partid, int channel,
+			  void *data, void *key)
+{
+	long bp;
+
+
+	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+	DBUG_ON(channel != XPC_NET_CHANNEL);
+
+	switch(reason) {
+	case xpcMsgReceived:	/* message received */
+		DBUG_ON(data == NULL);
+
+		xpnet_receive(partid, channel, (struct xpnet_message *) data);
+		break;
+
+	case xpcConnected:	/* connection completed to a partition */
+		spin_lock_bh(&xpnet_broadcast_lock);
+		xpnet_broadcast_partitions |= 1UL << (partid -1 );
+		bp = xpnet_broadcast_partitions;
+		spin_unlock_bh(&xpnet_broadcast_lock);
+
+		netif_carrier_on(xpnet_device);
+
+		dev_dbg(xpnet, "%s connection created to partition %d; "
+			"xpnet_broadcast_partitions=0x%lx\n",
+			xpnet_device->name, partid, bp);
+		break;
+
+	default:
+		spin_lock_bh(&xpnet_broadcast_lock);
+		xpnet_broadcast_partitions &= ~(1UL << (partid -1 ));
+		bp = xpnet_broadcast_partitions;
+		spin_unlock_bh(&xpnet_broadcast_lock);
+
+		if (bp == 0) {
+			netif_carrier_off(xpnet_device);
+		}
+
+		dev_dbg(xpnet, "%s disconnected from partition %d; "
+			"xpnet_broadcast_partitions=0x%lx\n",
+			xpnet_device->name, partid, bp);
+		break;
+
+	}
+}
+
+
+static int
+xpnet_dev_open(struct net_device *dev)
+{
+	enum xpc_retval ret;
+
+
+	dev_dbg(xpnet, "calling xpc_connect(%d, 0x%p, NULL, %ld, %ld, %d, "
+		"%d)\n", XPC_NET_CHANNEL, xpnet_connection_activity,
+		XPNET_MSG_SIZE, XPNET_MSG_NENTRIES, XPNET_MAX_KTHREADS,
+		XPNET_MAX_IDLE_KTHREADS);
+
+	ret = xpc_connect(XPC_NET_CHANNEL, xpnet_connection_activity, NULL,
+			  XPNET_MSG_SIZE, XPNET_MSG_NENTRIES,
+			  XPNET_MAX_KTHREADS, XPNET_MAX_IDLE_KTHREADS);
+	if (ret != xpcSuccess) {
+		dev_err(xpnet, "ifconfig up of %s failed on XPC connect, "
+			"ret=%d\n", dev->name, ret);
+
+		return -ENOMEM;
+	}
+
+	dev_dbg(xpnet, "ifconfig up of %s; XPC connected\n", dev->name);
+
+	return 0;
+}
+
+
+static int
+xpnet_dev_stop(struct net_device *dev)
+{
+	xpc_disconnect(XPC_NET_CHANNEL);
+
+	dev_dbg(xpnet, "ifconfig down of %s; XPC disconnected\n", dev->name);
+
+	return 0;
+}
+
+
+static int
+xpnet_dev_change_mtu(struct net_device *dev, int new_mtu)
+{
+	/* 68 comes from min TCP+IP+MAC header */
+	if ((new_mtu < 68) || (new_mtu > XPNET_MAX_MTU)) {
+		dev_err(xpnet, "ifconfig %s mtu %d failed; value must be "
+			"between 68 and %ld\n", dev->name, new_mtu,
+			XPNET_MAX_MTU);
+		return -EINVAL;
+	}
+
+	dev->mtu = new_mtu;
+	dev_dbg(xpnet, "ifconfig %s mtu set to %d\n", dev->name, new_mtu);
+	return 0;
+}
+
+
+/*
+ * Required for the net_device structure.
+ */
+static int
+xpnet_dev_set_config(struct net_device *dev, struct ifmap *new_map)
+{
+	return 0;
+}
+
+
+/*
+ * Return statistics to the caller.
+ */
+static struct net_device_stats *
+xpnet_dev_get_stats(struct net_device *dev)
+{
+	struct xpnet_dev_private *priv;
+
+
+	priv = (struct xpnet_dev_private *) dev->priv;
+
+	return &priv->stats;
+}
+
+
+/*
+ * Notification that the other end has received the message and
+ * DMA'd the skb information.  At this point, they are done with
+ * our side.  When all recipients are done processing, we
+ * release the skb and then release our pending message structure.
+ */
+static void
+xpnet_send_completed(enum xpc_retval reason, partid_t partid, int channel,
+			void *__qm)
+{
+	struct xpnet_pending_msg *queued_msg =
+		(struct xpnet_pending_msg *) __qm;
+
+
+	DBUG_ON(queued_msg == NULL);
+
+	dev_dbg(xpnet, "message to %d notified with reason %d\n",
+		partid, reason);
+
+	if (atomic_dec_return(&queued_msg->use_count) == 0) {
+		dev_dbg(xpnet, "all acks for skb->head=-x%p\n",
+			(void *) queued_msg->skb->head);
+
+		dev_kfree_skb_any(queued_msg->skb);
+		kfree(queued_msg);
+	}
+}
+
+
+/*
+ * Network layer has formatted a packet (skb) and is ready to place it
+ * "on the wire".  Prepare and send an xpnet_message to all partitions
+ * which have connected with us and are targets of this packet.
+ *
+ * MAC-NOTE:  For the XPNET driver, the MAC address contains the
+ * destination partition_id.  If the destination partition id word
+ * is 0xff, this packet is to broadcast to all partitions.
+ */
+static int
+xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct xpnet_pending_msg *queued_msg;
+	enum xpc_retval ret;
+	struct xpnet_message *msg;
+	u64 start_addr, end_addr;
+	long dp;
+	u8 second_mac_octet;
+	partid_t dest_partid;
+	struct xpnet_dev_private *priv;
+	u16 embedded_bytes;
+
+
+	priv = (struct xpnet_dev_private *) dev->priv;
+
+
+	dev_dbg(xpnet, ">skb->head=0x%p skb->data=0x%p skb->tail=0x%p "
+		"skb->end=0x%p skb->len=%d\n", (void *) skb->head,
+		(void *) skb->data, (void *) skb->tail, (void *) skb->end,
+		skb->len);
+
+
+	/*
+	 * The xpnet_pending_msg tracks how many outstanding
+	 * xpc_send_notifies are relying on this skb.  When none
+	 * remain, release the skb.
+	 */
+	queued_msg = kmalloc(sizeof(struct xpnet_pending_msg), GFP_ATOMIC);
+	if (queued_msg == NULL) {
+		dev_warn(xpnet, "failed to kmalloc %ld bytes; dropping "
+			"packet\n", sizeof(struct xpnet_pending_msg));
+
+		priv->stats.tx_errors++;
+
+		return -ENOMEM;
+	}
+
+
+	/* get the beginning of the first cacheline and end of last */
+	start_addr = ((u64) skb->data & ~(L1_CACHE_BYTES - 1));
+	end_addr = L1_CACHE_ALIGN((u64) skb->tail);
+
+	/* calculate how many bytes to embed in the XPC message */
+	embedded_bytes = 0;
+	if (unlikely(skb->len <= XPNET_MSG_DATA_MAX)) {
+		/* skb->data does fit so embed */
+		embedded_bytes = skb->len;
+	}
+
+
+	/*
+	 * Since the send occurs asynchronously, we set the count to one
+	 * and begin sending.  Any sends that happen to complete before
+	 * we are done sending will not free the skb.  We will be left
+	 * with that task during exit.  This also handles the case of
+	 * a packet destined for a partition which is no longer up.
+	 */
+	atomic_set(&queued_msg->use_count, 1);
+	queued_msg->skb = skb;
+
+
+	second_mac_octet = skb->data[XPNET_PARTID_OCTET];
+	if (second_mac_octet == 0xff) {
+		/* we are being asked to broadcast to all partitions */
+		dp = xpnet_broadcast_partitions;
+	} else if (second_mac_octet != 0) {
+		dp = xpnet_broadcast_partitions &
+					(1UL << (second_mac_octet - 1));
+	} else {
+		/* 0 is an invalid partid.  Ignore */
+		dp = 0;
+	}
+	dev_dbg(xpnet, "destination Partitions mask (dp) = 0x%lx\n", dp);
+
+	/*
+	 * If we wanted to allow promiscous mode to work like an
+	 * unswitched network, this would be a good point to OR in a
+	 * mask of partitions which should be receiving all packets.
+	 */
+
+	/*
+	 * Main send loop.
+	 */
+	for (dest_partid = 1; dp && dest_partid < XP_MAX_PARTITIONS;
+	     dest_partid++) {
+
+
+		if (!(dp & (1UL << (dest_partid - 1)))) {
+			/* not destined for this partition */
+			continue;
+		}
+
+		/* remove this partition from the destinations mask */
+		dp &= ~(1UL << (dest_partid - 1));
+
+
+		/* found a partition to send to */
+
+		ret = xpc_allocate(dest_partid, XPC_NET_CHANNEL,
+				   XPC_NOWAIT, (void **)&msg);
+		if (unlikely(ret != xpcSuccess)) {
+			continue;
+		}
+
+		msg->embedded_bytes = embedded_bytes;
+		if (unlikely(embedded_bytes != 0)) {
+			msg->version = XPNET_VERSION_EMBED;
+			dev_dbg(xpnet, "calling memcpy(0x%p, 0x%p, 0x%lx)\n",
+				&msg->data, skb->data, (size_t) embedded_bytes);
+			memcpy(&msg->data, skb->data, (size_t) embedded_bytes);
+		} else {
+			msg->version = XPNET_VERSION;
+		}
+		msg->magic = XPNET_MAGIC;
+		msg->size = end_addr - start_addr;
+		msg->leadin_ignore = (u64) skb->data - start_addr;
+		msg->tailout_ignore = end_addr - (u64) skb->tail;
+		msg->buf_pa = __pa(start_addr);
+
+		dev_dbg(xpnet, "sending XPC message to %d:%d\nmsg->buf_pa="
+			"0x%lx, msg->size=%u, msg->leadin_ignore=%u, "
+			"msg->tailout_ignore=%u\n", dest_partid,
+			XPC_NET_CHANNEL, msg->buf_pa, msg->size,
+			msg->leadin_ignore, msg->tailout_ignore);
+
+
+		atomic_inc(&queued_msg->use_count);
+
+		ret = xpc_send_notify(dest_partid, XPC_NET_CHANNEL, msg,
+				      xpnet_send_completed, queued_msg);
+		if (unlikely(ret != xpcSuccess)) {
+			atomic_dec(&queued_msg->use_count);
+			continue;
+		}
+
+	}
+
+	if (atomic_dec_return(&queued_msg->use_count) == 0) {
+		dev_dbg(xpnet, "no partitions to receive packet destined for "
+			"%d\n", dest_partid);
+
+
+		dev_kfree_skb(skb);
+		kfree(queued_msg);
+	}
+
+	priv->stats.tx_packets++;
+	priv->stats.tx_bytes += skb->len;
+
+	return 0;
+}
+
+
+/*
+ * Deal with transmit timeouts coming from the network layer.
+ */
+static void
+xpnet_dev_tx_timeout (struct net_device *dev)
+{
+	struct xpnet_dev_private *priv;
+
+
+	priv = (struct xpnet_dev_private *) dev->priv;
+
+	priv->stats.tx_errors++;
+	return;
+}
+
+
+static int __init
+xpnet_init(void)
+{
+	int i;
+	u32 license_num;
+	int result = -ENOMEM;
+
+
+	dev_info(xpnet, "registering network device %s\n", XPNET_DEVICE_NAME);
+
+	/*
+	 * use ether_setup() to init the majority of our device
+	 * structure and then override the necessary pieces.
+	 */
+	xpnet_device = alloc_netdev(sizeof(struct xpnet_dev_private),
+				    XPNET_DEVICE_NAME, ether_setup);
+	if (xpnet_device == NULL) {
+		return -ENOMEM;
+	}
+
+	netif_carrier_off(xpnet_device);
+
+	xpnet_device->mtu = XPNET_DEF_MTU;
+	xpnet_device->change_mtu = xpnet_dev_change_mtu;
+	xpnet_device->open = xpnet_dev_open;
+	xpnet_device->get_stats = xpnet_dev_get_stats;
+	xpnet_device->stop = xpnet_dev_stop;
+	xpnet_device->hard_start_xmit = xpnet_dev_hard_start_xmit;
+	xpnet_device->tx_timeout = xpnet_dev_tx_timeout;
+	xpnet_device->set_config = xpnet_dev_set_config;
+
+	/*
+	 * Multicast assumes the LSB of the first octet is set for multicast
+	 * MAC addresses.  We chose the first octet of the MAC to be unlikely
+	 * to collide with any vendor's officially issued MAC.
+	 */
+	xpnet_device->dev_addr[0] = 0xfe;
+	xpnet_device->dev_addr[XPNET_PARTID_OCTET] = sn_partition_id;
+	license_num = sn_partition_serial_number_val();
+	for (i = 3; i >= 0; i--) {
+		xpnet_device->dev_addr[XPNET_LICENSE_OCTET + i] =
+							license_num & 0xff;
+		license_num = license_num >> 8;
+	}
+
+	/*
+	 * ether_setup() sets this to a multicast device.  We are
+	 * really not supporting multicast at this time.
+	 */
+	xpnet_device->flags &= ~IFF_MULTICAST;
+
+	/*
+	 * No need to checksum as it is a DMA transfer.  The BTE will
+	 * report an error if the data is not retrievable and the
+	 * packet will be dropped.
+	 */
+	xpnet_device->features = NETIF_F_NO_CSUM;
+
+	result = register_netdev(xpnet_device);
+	if (result != 0) {
+		free_netdev(xpnet_device);
+	}
+
+	return result;
+}
+module_init(xpnet_init);
+
+
+static void __exit
+xpnet_exit(void)
+{
+	dev_info(xpnet, "unregistering network device %s\n",
+		xpnet_device[0].name);
+
+	unregister_netdev(xpnet_device);
+
+	free_netdev(xpnet_device);
+}
+module_exit(xpnet_exit);
+
+
+MODULE_AUTHOR("Silicon Graphics, Inc.");
+MODULE_DESCRIPTION("Cross Partition Network adapter (XPNET)");
+MODULE_LICENSE("GPL");
+

arch/ia64/sn/pci/pcibr/pcibr_dma.c

···
 		spin_lock_irqsave(&((struct sn_flush_device_list *)p)->
 				  sfdl_flush_lock, flags);
 
-		p->sfdl_flush_value = 0;
+		*p->sfdl_flush_addr = 0;
 
 		/* force an interrupt. */
 		*(volatile uint32_t *)(p->sfdl_force_int_addr) = 1;

arch/ia64/sn/pci/tioca_provider.c

···
 	ca_dmamap->cad_dma_addr = bus_addr;
 	ca_dmamap->cad_gart_size = entries;
 	ca_dmamap->cad_gart_entry = entry;
-	list_add(&ca_dmamap->cad_list, &tioca_kern->ca_list);
+	list_add(&ca_dmamap->cad_list, &tioca_kern->ca_dmamaps);
 
 	if (xio_addr % ps) {
 		tioca_kern->ca_pcigart[entry] = tioca_paddr_to_gart(xio_addr);

drivers/char/Kconfig

···
 
 config SGI_MBCS
        tristate "SGI FPGA Core Services driver support"
-       depends on (IA64_SGI_SN2 || IA64_GENERIC)
+       depends on SGI_TIOCX
        help
          If you have an SGI Altix with an attached SABrick
          say Y or M here, otherwise say N.

include/asm-ia64/sn/addrs.h

···
  */
 #define CAC_BASE		(CACHED   | AS_CAC_SPACE)
 #define AMO_BASE		(UNCACHED | AS_AMO_SPACE)
+#define AMO_PHYS_BASE		(UNCACHED_PHYS | AS_AMO_SPACE)
 #define GET_BASE		(CACHED   | AS_GET_SPACE)
 
 /*
···
  */
 #define PHYS_TO_TIODMA(x)	( (((u64)(NASID_GET(x))) << 40) | NODE_OFFSET(x))
 #define PHYS_TO_DMA(x)          ( (((u64)(x) & NASID_MASK) >> 2) | NODE_OFFSET(x))
+
+
+/*
+ * Macros to test for address type.
+ */
+#define IS_AMO_ADDRESS(x)	(((u64)(x) & (REGION_BITS | AS_MASK)) == AMO_BASE)
+#define IS_AMO_PHYS_ADDRESS(x)	(((u64)(x) & (REGION_BITS | AS_MASK)) == AMO_PHYS_BASE)
 
 
 /*

include/asm-ia64/sn/arch.h

···
  *
  * SGI specific setup.
  *
- * Copyright (C) 1995-1997,1999,2001-2004 Silicon Graphics, Inc.  All rights reserved.
+ * Copyright (C) 1995-1997,1999,2001-2005 Silicon Graphics, Inc.  All rights reserved.
  * Copyright (C) 1999 Ralf Baechle ([e-mail])
  */
 #ifndef _ASM_IA64_SN_ARCH_H
···
  */
 #define MAX_COMPACT_NODES	2048
 #define CPUS_PER_NODE		4
+
+
+/*
+ * Compact node ID to nasid mappings kept in the per-cpu data areas of each
+ * cpu.
+ */
+DECLARE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_NUMNODES]);
+#define sn_cnodeid_to_nasid	(&__get_cpu_var(__sn_cnodeid_to_nasid[0]))
+
+
+
+extern u8 sn_partition_id;
+extern u8 sn_system_size;
+extern u8 sn_sharing_domain_size;
+extern u8 sn_region_size;
 
 extern void sn_flush_all_caches(long addr, long bytes);
 

include/asm-ia64/sn/fetchop.h

···
-/*
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (c) 2001-2004 Silicon Graphics, Inc.  All rights reserved.
- */
-
-#ifndef _ASM_IA64_SN_FETCHOP_H
-#define _ASM_IA64_SN_FETCHOP_H
-
-#include <linux/config.h>
-
-#define FETCHOP_BASENAME	"sgi_fetchop"
-#define FETCHOP_FULLNAME	"/dev/sgi_fetchop"
-
-
-
-#define FETCHOP_VAR_SIZE 64 /* 64 byte per fetchop variable */
-
-#define FETCHOP_LOAD		0
-#define FETCHOP_INCREMENT	8
-#define FETCHOP_DECREMENT	16
-#define FETCHOP_CLEAR		24
-
-#define FETCHOP_STORE		0
-#define FETCHOP_AND		24
-#define FETCHOP_OR		32
-
-#define FETCHOP_CLEAR_CACHE	56
-
-#define FETCHOP_LOAD_OP(addr, op) ( \
-         *(volatile long *)((char*) (addr) + (op)))
-
-#define FETCHOP_STORE_OP(addr, op, x) ( \
-         *(volatile long *)((char*) (addr) + (op)) = (long) (x))
-
-#ifdef __KERNEL__
-
-/*
- * Convert a region 6 (kaddr) address to the address of the fetchop variable
- */
-#define FETCHOP_KADDR_TO_MSPEC_ADDR(kaddr)	TO_MSPEC(kaddr)
-
-
-/*
- * Each Atomic Memory Operation (AMO formerly known as fetchop)
- * variable is 64 bytes long.  The first 8 bytes are used.  The
- * remaining 56 bytes are unaddressable due to the operation taking
- * that portion of the address.
- * 
- * NOTE: The AMO_t _MUST_ be placed in either the first or second half
- * of the cache line.  The cache line _MUST NOT_ be used for anything
- * other than additional AMO_t entries.  This is because there are two
- * addresses which reference the same physical cache line.  One will
- * be a cached entry with the memory type bits all set.  This address
- * may be loaded into processor cache.  The AMO_t will be referenced
- * uncached via the memory special memory type.  If any portion of the
- * cached cache-line is modified, when that line is flushed, it will
- * overwrite the uncached value in physical memory and lead to
- * inconsistency.
- */
-typedef struct {
-        u64 variable;
-        u64 unused[7];
-} AMO_t;
-
-
-/*
- * The following APIs are externalized to the kernel to allocate/free pages of
- * fetchop variables.
- *	fetchop_kalloc_page	- Allocate/initialize 1 fetchop page on the
- *				  specified cnode. 
- *	fetchop_kfree_page	- Free a previously allocated fetchop page
- */
-
-unsigned long fetchop_kalloc_page(int nid);
-void fetchop_kfree_page(unsigned long maddr);
-
-
-#endif /* __KERNEL__ */
-
-#endif /* _ASM_IA64_SN_FETCHOP_H */
-

include/asm-ia64/sn/l1.h

···
 #define L1_BRICKTYPE_CHI_CG     0x76            /* v */
 #define L1_BRICKTYPE_X          0x78            /* x */
 #define L1_BRICKTYPE_X2         0x79            /* y */
-#define L1_BRICKTYPE_SA		0x5e            /* ^ */ /* TIO bringup brick */
+#define L1_BRICKTYPE_SA		0x5e            /* ^ */
 #define L1_BRICKTYPE_PA		0x6a            /* j */
 #define L1_BRICKTYPE_IA		0x6b            /* k */
+#define L1_BRICKTYPE_ATHENA	0x2b            /* + */
 
 #endif /* _ASM_IA64_SN_L1_H */

include/asm-ia64/sn/nodepda.h

···
 #include <asm/irq.h>
 #include <asm/sn/arch.h>
 #include <asm/sn/intr.h>
-#include <asm/sn/pda.h>
 #include <asm/sn/bte.h>
 
 /*
···
  * The next set of definitions provides this.
  * Routines are expected to use 
  *
- *	nodepda			-> to access node PDA for the node on which code is running
- *	subnodepda		-> to access subnode PDA for the subnode on which code is running
- *
- *	NODEPDA(cnode)		-> to access node PDA for cnodeid 
- *	SUBNODEPDA(cnode,sn)	-> to access subnode PDA for cnodeid/subnode
+ *	sn_nodepda   - to access node PDA for the node on which code is running
+ *	NODEPDA(cnodeid)   - to access node PDA for cnodeid
  */
 
-#define	nodepda		pda->p_nodepda		/* Ptr to this node's PDA */
-#define	NODEPDA(cnode)		(nodepda->pernode_pdaindr[cnode])
+DECLARE_PER_CPU(struct nodepda_s *, __sn_nodepda);
+#define sn_nodepda		(__get_cpu_var(__sn_nodepda))
+#define	NODEPDA(cnodeid)	(sn_nodepda->pernode_pdaindr[cnodeid])
 
 /*
  * Check if given a compact node id the corresponding node has all the
  * cpus disabled. 
  */
-#define is_headless_node(cnode)		(nr_cpus_node(cnode) == 0)
+#define is_headless_node(cnodeid)	(nr_cpus_node(cnodeid) == 0)
 
 #endif /* _ASM_IA64_SN_NODEPDA_H */

include/asm-ia64/sn/pda.h

···
 
 typedef struct pda_s {
 
-	/* Having a pointer in the begining of PDA tends to increase
-	 * the chance of having this pointer in cache. (Yes something
-	 * else gets pushed out). Doing this reduces the number of memory
-	 * access to all nodepda variables to be one
-	 */
-	struct nodepda_s *p_nodepda;		/* Pointer to Per node PDA */
-	struct subnodepda_s *p_subnodepda;	/* Pointer to CPU  subnode PDA */
-
 	/*
 	 * Support for SN LEDs
 	 */
···
 
 	unsigned long	sn_soft_irr[4];
 	unsigned long	sn_in_service_ivecs[4];
-	short		cnodeid_to_nasid_table[MAX_NUMNODES];
 	int		sn_lb_int_war_ticks;
 	int		sn_last_irq;
 	int		sn_first_irq;

include/asm-ia64/sn/shub_mmr.h

···
 #define SH_EVENT_OCCURRED_RTC3_INT_MASK          0x0000000004000000
 
 /* ==================================================================== */
+/*                       Register "SH_IPI_ACCESS"                       */
+/*                 CPU interrupt Access Permission Bits                 */
+/* ==================================================================== */
+
+#define SH1_IPI_ACCESS                           0x0000000110060480
+#define SH2_IPI_ACCESS0                          0x0000000010060c00
+#define SH2_IPI_ACCESS1                          0x0000000010060c80
+#define SH2_IPI_ACCESS2                          0x0000000010060d00
+#define SH2_IPI_ACCESS3                          0x0000000010060d80
+
+/* ==================================================================== */
 /*                        Register "SH_INT_CMPB"                        */
 /*                  RTC Compare Value for Processor B                   */
 /* ==================================================================== */
···
 #define SH_INT_CMPD_REAL_TIME_CMPD_SHFT          0
 #define SH_INT_CMPD_REAL_TIME_CMPD_MASK          0x007fffffffffffff
 
+/* ==================================================================== */
+/*                Register "SH_MD_DQLP_MMR_DIR_PRIVEC0"                 */
+/*                      privilege vector for acc=0                      */
+/* ==================================================================== */
+
+#define SH1_MD_DQLP_MMR_DIR_PRIVEC0              0x0000000100030300
+
+/* ==================================================================== */
+/*                Register "SH_MD_DQRP_MMR_DIR_PRIVEC0"                 */
+/*                      privilege vector for acc=0                      */
+/* ==================================================================== */
+
+#define SH1_MD_DQRP_MMR_DIR_PRIVEC0              0x0000000100050300
 
 /* ==================================================================== */
 /* Some MMRs are functionally identical (or close enough) on both SHUB1 */

include/asm-ia64/sn/shubio.h

···
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 1992 - 1997, 2000-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved.
  */
 
 #ifndef _ASM_IA64_SN_SHUBIO_H
 #define _ASM_IA64_SN_SHUBIO_H
 
-#define HUB_WIDGET_ID_MAX 0xf
-#define IIO_NUM_ITTES   7
-#define HUB_NUM_BIG_WINDOW      (IIO_NUM_ITTES - 1)
+#define HUB_WIDGET_ID_MAX	0xf
+#define IIO_NUM_ITTES		7
+#define HUB_NUM_BIG_WINDOW	(IIO_NUM_ITTES - 1)
 
-#define    IIO_WID                   0x00400000    /* Crosstalk Widget Identification */
-                                                   /* This register is also accessible from
-                                                    * Crosstalk at address 0x0.  */
-#define    IIO_WSTAT                 0x00400008    /* Crosstalk Widget Status */
-#define    IIO_WCR                   0x00400020    /* Crosstalk Widget Control Register */
-#define    IIO_ILAPR                 0x00400100    /* IO Local Access Protection Register */
-#define    IIO_ILAPO                 0x00400108    /* IO Local Access Protection Override */
-#define    IIO_IOWA                  0x00400110    /* IO Outbound Widget Access */
-#define    IIO_IIWA                  0x00400118    /* IO Inbound Widget Access */
-#define    IIO_IIDEM                 0x00400120    /* IO Inbound Device Error Mask */
-#define    IIO_ILCSR                 0x00400128    /* IO LLP Control and Status Register */
-#define    IIO_ILLR                  0x00400130    /* IO LLP Log Register    */
-#define    IIO_IIDSR                 0x00400138    /* IO Interrupt Destination */
+#define		IIO_WID			0x00400000	/* Crosstalk Widget Identification */
+							/* This register is also accessible from
+							 * Crosstalk at address 0x0.  */
+#define		IIO_WSTAT		0x00400008	/* Crosstalk Widget Status */
+#define		IIO_WCR			0x00400020	/* Crosstalk Widget Control Register */
+#define		IIO_ILAPR		0x00400100	/* IO Local Access Protection Register */
+#define		IIO_ILAPO		0x00400108	/* IO Local Access Protection Override */
+#define		IIO_IOWA		0x00400110	/* IO Outbound Widget Access */
+#define		IIO_IIWA		0x00400118	/* IO Inbound Widget Access */
+#define		IIO_IIDEM		0x00400120	/* IO Inbound Device Error Mask */
+#define		IIO_ILCSR		0x00400128	/* IO LLP Control and Status Register */
+#define		IIO_ILLR		0x00400130	/* IO LLP Log Register    */
+#define		IIO_IIDSR		0x00400138	/* IO Interrupt Destination */
 
-#define    IIO_IGFX0                 0x00400140    /* IO Graphics Node-Widget Map 0 */
-#define    IIO_IGFX1                 0x00400148    /* IO Graphics Node-Widget Map 1 */
+#define		IIO_IGFX0		0x00400140	/* IO Graphics Node-Widget Map 0 */
+#define		IIO_IGFX1		0x00400148	/* IO Graphics Node-Widget Map 1 */
 
-#define    IIO_ISCR0                 0x00400150    /* IO Scratch Register 0 */
-#define    IIO_ISCR1                 0x00400158    /* IO Scratch Register 1 */
+#define		IIO_ISCR0		0x00400150	/* IO Scratch Register 0 */
+#define		IIO_ISCR1		0x00400158	/* IO Scratch Register 1 */
 
-#define    IIO_ITTE1                 0x00400160    /* IO Translation Table Entry 1 */
-#define    IIO_ITTE2                 0x00400168    /* IO Translation Table Entry 2 */
-#define    IIO_ITTE3                 0x00400170    /* IO Translation Table Entry 3 */
-#define    IIO_ITTE4                 0x00400178    /* IO Translation Table Entry 4 */
-#define    IIO_ITTE5                 0x00400180    /* IO Translation Table Entry 5 */
-#define    IIO_ITTE6                 0x00400188    /* IO Translation Table Entry 6 */
-#define    IIO_ITTE7                 0x00400190    /* IO Translation Table Entry 7 */
+#define		IIO_ITTE1		0x00400160	/* IO Translation Table Entry 1 */
+#define		IIO_ITTE2		0x00400168	/* IO Translation Table Entry 2 */
+#define		IIO_ITTE3		0x00400170	/* IO Translation Table Entry 3 */
+#define		IIO_ITTE4		0x00400178	/* IO Translation Table Entry 4 */
+#define		IIO_ITTE5		0x00400180	/* IO Translation Table Entry 5 */
+#define		IIO_ITTE6		0x00400188	/* IO Translation Table Entry 6 */
+#define		IIO_ITTE7		0x00400190	/* IO Translation Table Entry 7 */
 
-#define    IIO_IPRB0                 0x00400198    /* IO PRB Entry 0         */
-#define    IIO_IPRB8                 0x004001A0    /* IO PRB Entry 8         */
-#define    IIO_IPRB9                 0x004001A8    /* IO PRB Entry 9         */
-#define    IIO_IPRBA                 0x004001B0    /* IO PRB Entry A         */
-#define    IIO_IPRBB                 0x004001B8    /* IO PRB Entry B         */
-#define    IIO_IPRBC                 0x004001C0    /* IO PRB Entry C         */
-#define    IIO_IPRBD                 0x004001C8    /* IO PRB Entry D         */
-#define    IIO_IPRBE                 0x004001D0    /* IO PRB Entry E         */
-#define    IIO_IPRBF                 0x004001D8    /* IO PRB Entry F         */
+#define		IIO_IPRB0		0x00400198	/* IO PRB Entry 0   */
+#define		IIO_IPRB8		0x004001A0	/* IO PRB Entry 8   */
+#define		IIO_IPRB9		0x004001A8	/* IO PRB Entry 9   */
+#define		IIO_IPRBA		0x004001B0	/* IO PRB Entry A   */
+#define		IIO_IPRBB		0x004001B8	/* IO PRB Entry B   */
+#define		IIO_IPRBC		0x004001C0	/* IO PRB Entry C   */
+#define		IIO_IPRBD		0x004001C8	/* IO PRB Entry D   */
+#define		IIO_IPRBE		0x004001D0	/* IO PRB Entry E   */
+#define		IIO_IPRBF		0x004001D8	/* IO PRB Entry F   */
 
-#define    IIO_IXCC                  0x004001E0    /* IO Crosstalk Credit Count Timeout */
-#define    IIO_IMEM                  0x004001E8    /* IO Miscellaneous Error Mask */
-#define    IIO_IXTT                  0x004001F0    /* IO Crosstalk Timeout Threshold */
-#define    IIO_IECLR                 0x004001F8    /* IO Error Clear Register */
-#define    IIO_IBCR                  0x00400200    /* IO BTE Control Register */
+#define		IIO_IXCC		0x004001E0	/* IO Crosstalk Credit Count Timeout */
+#define		IIO_IMEM		0x004001E8	/* IO Miscellaneous Error Mask */
+#define		IIO_IXTT		0x004001F0	/* IO Crosstalk Timeout Threshold */
+#define		IIO_IECLR		0x004001F8	/* IO Error Clear Register */
+#define		IIO_IBCR		0x00400200	/* IO BTE Control Register */
 
-#define    IIO_IXSM                  0x00400208    /* IO Crosstalk Spurious Message */
-#define    IIO_IXSS                  0x00400210    /* IO Crosstalk Spurious Sideband */
+#define		IIO_IXSM		0x00400208	/* IO Crosstalk Spurious Message */
+#define		IIO_IXSS		0x00400210	/* IO Crosstalk Spurious Sideband */
 
-#define    IIO_ILCT                  0x00400218    /* IO LLP Channel Test    */
+#define		IIO_ILCT		0x00400218	/* IO LLP Channel Test    */
 
-#define    IIO_IIEPH1                0x00400220    /* IO Incoming Error Packet Header, Part 1 */
-#define    IIO_IIEPH2                0x00400228    /* IO Incoming Error Packet Header, Part 2 */
+#define		IIO_IIEPH1 		0x00400220	/* IO Incoming Error Packet Header, Part 1 */
+#define		IIO_IIEPH2 		0x00400228	/* IO Incoming Error Packet Header, Part 2 */
 
+#define		IIO_ISLAPR 		0x00400230	/* IO SXB Local Access Protection Regster */
+#define		IIO_ISLAPO 		0x00400238	/* IO SXB Local Access Protection Override */
 
-#define    IIO_ISLAPR                0x00400230    /* IO SXB Local Access Protection Regster */
-#define    IIO_ISLAPO                0x00400238    /* IO SXB Local Access Protection Override */
+#define		IIO_IWI			0x00400240	/* IO Wrapper Interrupt Register */
+#define		IIO_IWEL		0x00400248	/* IO Wrapper Error Log Register */
+#define		IIO_IWC			0x00400250	/* IO Wrapper Control Register */
+#define		IIO_IWS			0x00400258	/* IO Wrapper Status Register */
+#define		IIO_IWEIM		0x00400260	/* IO Wrapper Error Interrupt Masking Register */
 
-#define    IIO_IWI                   0x00400240    /* IO Wrapper Interrupt Register */
-#define    IIO_IWEL                  0x00400248    /* IO Wrapper Error Log Register */
-#define    IIO_IWC                   0x00400250    /* IO Wrapper Control Register */
-#define    IIO_IWS                   0x00400258    /* IO Wrapper Status Register */
-#define    IIO_IWEIM                 0x00400260    /* IO Wrapper Error Interrupt Masking Register */
+#define		IIO_IPCA		0x00400300	/* IO PRB Counter Adjust */
 
-#define    IIO_IPCA                  0x00400300    /* IO PRB Counter Adjust */
+#define		IIO_IPRTE0_A		0x00400308	/* IO PIO Read Address Table Entry 0, Part A */
+#define		IIO_IPRTE1_A		0x00400310	/* IO PIO Read Address Table Entry 1, Part A */
+#define		IIO_IPRTE2_A		0x00400318	/* IO PIO Read Address Table Entry 2, Part A */
+#define		IIO_IPRTE3_A		0x00400320	/* IO PIO Read Address Table Entry 3, Part A */
+#define		IIO_IPRTE4_A		0x00400328	/* IO PIO Read Address Table Entry 4, Part A */
+#define		IIO_IPRTE5_A		0x00400330	/* IO PIO Read Address Table Entry 5, Part A */
+#define		IIO_IPRTE6_A		0x00400338	/* IO PIO Read Address Table Entry 6, Part A */
+#define		IIO_IPRTE7_A		0x00400340	/* IO PIO Read Address Table Entry 7, Part A */
 
-#define    IIO_IPRTE0_A              0x00400308    /* IO PIO Read Address Table Entry 0, Part A */
-#define    IIO_IPRTE1_A              0x00400310    /* IO PIO Read Address Table Entry 1, Part A */
-#define    IIO_IPRTE2_A              0x00400318    /* IO PIO Read Address Table Entry 2, Part A */
-#define    IIO_IPRTE3_A               0x00400320    /* IO PIO Read Address Table Entry 3, Part A */
-#define    IIO_IPRTE4_A               0x00400328    /* IO PIO Read Address Table Entry 4, Part A */
-#define    IIO_IPRTE5_A               0x00400330    /* IO PIO Read Address Table Entry 5, Part A */
-#define    IIO_IPRTE6_A               0x00400338    /* IO PIO Read Address Table Entry 6, Part A */
-#define    IIO_IPRTE7_A               0x00400340    /* IO PIO Read Address Table Entry 7, Part A */
+#define		IIO_IPRTE0_B		0x00400348	/* IO PIO Read Address Table Entry 0, Part B */
+#define		IIO_IPRTE1_B		0x00400350	/* IO PIO Read Address Table Entry 1, Part B */
+#define		IIO_IPRTE2_B		0x00400358	/* IO PIO Read Address Table Entry 2, Part B */
+#define		IIO_IPRTE3_B		0x00400360	/* IO PIO Read Address Table Entry 3, Part B */
+#define		IIO_IPRTE4_B		0x00400368	/* IO PIO Read Address Table Entry 4, Part B */
+#define		IIO_IPRTE5_B		0x00400370	/* IO PIO Read Address Table Entry 5, Part B */
+#define		IIO_IPRTE6_B		0x00400378	/* IO PIO Read Address Table Entry 6, Part B */
+#define		IIO_IPRTE7_B		0x00400380	/* IO PIO Read Address Table Entry 7, Part B */
 
-#define    IIO_IPRTE0_B              0x00400348    /* IO PIO Read Address Table Entry 0, Part B */
-#define    IIO_IPRTE1_B              0x00400350    /* IO PIO Read Address Table Entry 1, Part B */
-#define    IIO_IPRTE2_B              0x00400358    /* IO PIO Read Address Table Entry 2, Part B */
-#define    IIO_IPRTE3_B               0x00400360    /* IO PIO Read Address Table Entry 3, Part B */
-#define    IIO_IPRTE4_B               0x00400368    /* IO PIO Read Address Table Entry 4, Part B */
-#define    IIO_IPRTE5_B               0x00400370    /* IO PIO Read Address Table Entry 5, Part B */
-#define    IIO_IPRTE6_B               0x00400378    /* IO PIO Read Address Table Entry 6, Part B */
-#define    IIO_IPRTE7_B               0x00400380    /* IO PIO Read Address Table Entry 7, Part B */
+#define		IIO_IPDR		0x00400388	/* IO PIO Deallocation Register */
+#define		IIO_ICDR		0x00400390	/* IO CRB Entry Deallocation Register */
+#define		IIO_IFDR		0x00400398	/* IO IOQ FIFO Depth Register */
+#define		IIO_IIAP		0x004003A0	/* IO IIQ Arbitration Parameters */
+#define		IIO_ICMR		0x004003A8	/* IO CRB Management Register */
+#define		IIO_ICCR		0x004003B0	/* IO CRB Control Register */
+#define		IIO_ICTO		0x004003B8	/* IO CRB Timeout   */
+#define		IIO_ICTP		0x004003C0	/* IO CRB Timeout Prescalar */
 
-#define    IIO_IPDR                  0x00400388    /* IO PIO Deallocation Register */
-#define    IIO_ICDR                  0x00400390    /* IO CRB Entry Deallocation Register */
-#define    IIO_IFDR                  0x00400398    /* IO IOQ FIFO Depth Register */
-#define    IIO_IIAP                  0x004003A0    /* IO IIQ Arbitration Parameters */
-#define    IIO_ICMR                  0x004003A8    /* IO CRB Management Register */
-#define    IIO_ICCR                  0x004003B0    /* IO CRB Control Register */
-#define    IIO_ICTO                  0x004003B8    /* IO CRB Timeout         */
-#define    IIO_ICTP                  0x004003C0    /* IO CRB Timeout Prescalar */
+#define		IIO_ICRB0_A		0x00400400	/* IO CRB Entry 0_A */
+#define		IIO_ICRB0_B		0x00400408	/* IO CRB Entry 0_B */
+#define		IIO_ICRB0_C		0x00400410	/* IO CRB Entry 0_C */
+#define		IIO_ICRB0_D		0x00400418	/* IO CRB Entry 0_D */
+#define		IIO_ICRB0_E		0x00400420	/* IO CRB Entry 0_E */
 
-#define    IIO_ICRB0_A               0x00400400    /* IO CRB Entry 0_A       */
-#define    IIO_ICRB0_B               0x00400408    /* IO CRB Entry 0_B       */
-#define    IIO_ICRB0_C               0x00400410    /* IO CRB Entry 0_C       */
-#define    IIO_ICRB0_D               0x00400418    /* IO CRB Entry 0_D       */
-#define    IIO_ICRB0_E               0x00400420    /* IO CRB Entry 0_E       */
+#define		IIO_ICRB1_A		0x00400430	/* IO CRB Entry 1_A */
+#define		IIO_ICRB1_B		0x00400438	/* IO CRB Entry 1_B */
+#define		IIO_ICRB1_C		0x00400440	/* IO CRB Entry 1_C */
+#define		IIO_ICRB1_D		0x00400448	/* IO CRB Entry 1_D */
+#define		IIO_ICRB1_E		0x00400450	/* IO CRB Entry 1_E */
 
-#define    IIO_ICRB1_A               0x00400430    /* IO CRB Entry 1_A       */
-#define    IIO_ICRB1_B               0x00400438    /* IO CRB Entry 1_B       */
-#define    IIO_ICRB1_C               0x00400440    /* IO CRB Entry 1_C       */
-#define    IIO_ICRB1_D               0x00400448    /* IO CRB Entry 1_D       */
-#define    IIO_ICRB1_E               0x00400450    /* IO CRB Entry 1_E       */
+#define		IIO_ICRB2_A		0x00400460	/* IO CRB Entry 2_A */
+#define		IIO_ICRB2_B		0x00400468	/* IO CRB Entry 2_B */
+#define		IIO_ICRB2_C		0x00400470	/* IO CRB Entry 2_C */
+#define		IIO_ICRB2_D		0x00400478	/* IO CRB Entry 2_D */
+#define		IIO_ICRB2_E		0x00400480	/* IO CRB Entry 2_E */
 
-#define    IIO_ICRB2_A               0x00400460    /* IO CRB Entry 2_A       */
-#define    IIO_ICRB2_B               0x00400468    /* IO CRB Entry 2_B       */
-#define    IIO_ICRB2_C               0x00400470    /* IO CRB Entry 2_C       */
-#define    IIO_ICRB2_D               0x00400478    /* IO CRB Entry 2_D       */
-#define    IIO_ICRB2_E               0x00400480    /* IO CRB Entry 2_E       */
+#define		IIO_ICRB3_A		0x00400490	/* IO CRB Entry 3_A */
+#define		IIO_ICRB3_B		0x00400498	/* IO CRB Entry 3_B */
+#define		IIO_ICRB3_C		0x004004a0	/* IO CRB Entry 3_C */
+#define		IIO_ICRB3_D		0x004004a8	/* IO CRB Entry 3_D */
+#define		IIO_ICRB3_E		0x004004b0	/* IO CRB Entry 3_E */
 
-#define    IIO_ICRB3_A               0x00400490    /* IO CRB Entry 3_A       */
-#define    IIO_ICRB3_B               0x00400498    /* IO CRB Entry 3_B       */
-#define    IIO_ICRB3_C               0x004004a0    /* IO CRB Entry 3_C       */
-#define    IIO_ICRB3_D               0x004004a8    /* IO CRB Entry 3_D       */
-#define    IIO_ICRB3_E               0x004004b0    /* IO CRB Entry 3_E       */
+#define		IIO_ICRB4_A		0x004004c0	/* IO CRB Entry 4_A */
+#define		IIO_ICRB4_B		0x004004c8	/* IO CRB Entry 4_B */
+#define		IIO_ICRB4_C		0x004004d0	/* IO CRB Entry 4_C */
+#define		IIO_ICRB4_D		0x004004d8	/* IO CRB Entry 4_D */
+#define		IIO_ICRB4_E		0x004004e0	/* IO CRB Entry 4_E */
 
-#define    IIO_ICRB4_A               0x004004c0    /* IO CRB Entry 4_A       */
-#define    IIO_ICRB4_B               0x004004c8    /* IO CRB Entry 4_B       */
-#define    IIO_ICRB4_C               0x004004d0    /* IO CRB Entry 4_C       */
-#define    IIO_ICRB4_D               0x004004d8    /* IO CRB Entry 4_D       */
-#define    IIO_ICRB4_E               0x004004e0    /* IO CRB Entry 4_E       */
+#define		IIO_ICRB5_A		0x004004f0	/* IO CRB Entry 5_A */
+#define		IIO_ICRB5_B		0x004004f8	/* IO CRB Entry 5_B */
+#define		IIO_ICRB5_C		0x00400500	/* IO CRB Entry 5_C */
+#define		IIO_ICRB5_D		0x00400508	/* IO CRB Entry 5_D */
+#define		IIO_ICRB5_E		0x00400510	/* IO CRB Entry 5_E */
 
-#define    IIO_ICRB5_A               0x004004f0    /* IO CRB Entry 5_A       */
-#define    IIO_ICRB5_B               0x004004f8    /* IO CRB Entry 5_B       */
-#define    IIO_ICRB5_C               0x00400500    /* IO CRB Entry 5_C       */
-#define    IIO_ICRB5_D               0x00400508    /* IO CRB Entry 5_D       */
-#define    IIO_ICRB5_E               0x00400510    /* IO CRB Entry 5_E       */
+#define		IIO_ICRB6_A		0x00400520	/* IO CRB Entry 6_A */
+#define		IIO_ICRB6_B		0x00400528	/* IO CRB Entry 6_B */
+#define		IIO_ICRB6_C		0x00400530	/* IO CRB Entry 6_C */
+#define		IIO_ICRB6_D		0x00400538	/* IO CRB Entry 6_D */
+#define		IIO_ICRB6_E		0x00400540	/* IO CRB Entry 6_E */
 
-#define    IIO_ICRB6_A               0x00400520    /* IO CRB Entry 6_A       */
-#define    IIO_ICRB6_B               0x00400528    /* IO CRB Entry 6_B       */
-#define    IIO_ICRB6_C               0x00400530    /* IO CRB Entry 6_C       */
-#define    IIO_ICRB6_D               0x00400538    /* IO CRB Entry 6_D       */
-#define    IIO_ICRB6_E               0x00400540    /* IO CRB Entry 6_E       */
+#define		IIO_ICRB7_A		0x00400550	/* IO CRB Entry 7_A */
+#define		IIO_ICRB7_B		0x00400558	/* IO CRB Entry 7_B */
+#define		IIO_ICRB7_C		0x00400560	/* IO CRB Entry 7_C */
+#define		IIO_ICRB7_D		0x00400568	/* IO CRB Entry 7_D */
+#define		IIO_ICRB7_E		0x00400570	/* IO CRB Entry 7_E */
 
-#define    IIO_ICRB7_A               0x00400550    /* IO CRB Entry 7_A       */
-#define    IIO_ICRB7_B               0x00400558    /* IO CRB Entry 7_B       */
-#define    IIO_ICRB7_C               0x00400560    /* IO CRB Entry 7_C       */
-#define    IIO_ICRB7_D               0x00400568    /* IO CRB Entry 7_D       */
-#define    IIO_ICRB7_E               0x00400570    /* IO CRB Entry 7_E       */
+#define		IIO_ICRB8_A		0x00400580	/* IO CRB Entry 8_A */
+#define		IIO_ICRB8_B		0x00400588	/* IO CRB Entry 8_B */
+#define		IIO_ICRB8_C		0x00400590	/* IO CRB Entry 8_C */
+#define		IIO_ICRB8_D		0x00400598	/* IO CRB Entry 8_D */
+#define		IIO_ICRB8_E		0x004005a0	/* IO CRB Entry 8_E */
 
-#define    IIO_ICRB8_A               0x00400580    /* IO CRB Entry 8_A       */
-#define    IIO_ICRB8_B               0x00400588    /* IO CRB Entry 8_B       */
-#define    IIO_ICRB8_C               0x00400590    /* IO CRB Entry 8_C       */
-#define    IIO_ICRB8_D               0x00400598    /* IO CRB Entry 8_D       */
-#define    IIO_ICRB8_E               0x004005a0    /* IO CRB Entry 8_E       */
+#define		IIO_ICRB9_A		0x004005b0	/* IO CRB Entry 9_A */
+#define		IIO_ICRB9_B		0x004005b8	/* IO CRB Entry 9_B */
+#define		IIO_ICRB9_C		0x004005c0	/* IO CRB Entry 9_C */
+#define		IIO_ICRB9_D		0x004005c8	/* IO CRB Entry 9_D */
+#define		IIO_ICRB9_E		0x004005d0	/* IO CRB Entry 9_E */
 
-#define    IIO_ICRB9_A               0x004005b0    /* IO CRB Entry 9_A       */
-#define    IIO_ICRB9_B               0x004005b8    /* IO CRB Entry 9_B       */
-#define    IIO_ICRB9_C               0x004005c0    /* IO CRB Entry 9_C       */
-#define    IIO_ICRB9_D               0x004005c8    /* IO CRB Entry 9_D       */
-#define    IIO_ICRB9_E               0x004005d0    /* IO CRB Entry 9_E       */
+#define		IIO_ICRBA_A		0x004005e0	/* IO CRB Entry A_A */
+#define		IIO_ICRBA_B		0x004005e8	/* IO CRB Entry A_B */
+#define		IIO_ICRBA_C		0x004005f0	/* IO CRB Entry A_C */
+#define		IIO_ICRBA_D		0x004005f8	/* IO CRB Entry A_D */
+#define		IIO_ICRBA_E		0x00400600	/* IO CRB Entry A_E */
 
-#define    IIO_ICRBA_A               0x004005e0    /* IO CRB Entry A_A       */
-#define    IIO_ICRBA_B               0x004005e8    /* IO CRB Entry A_B       */
-#define    IIO_ICRBA_C               0x004005f0    /* IO CRB Entry A_C       */
-#define    IIO_ICRBA_D               0x004005f8    /* IO CRB Entry A_D       */
-#define    IIO_ICRBA_E               0x00400600    /* IO CRB Entry A_E       */
+#define		IIO_ICRBB_A		0x00400610	/* IO CRB Entry B_A */
+#define		IIO_ICRBB_B		0x00400618	/* IO CRB Entry B_B */
+#define		IIO_ICRBB_C		0x00400620	/* IO CRB Entry B_C */
+#define		IIO_ICRBB_D		0x00400628	/* IO CRB Entry B_D */
+#define		IIO_ICRBB_E		0x00400630	/* IO CRB Entry B_E */
 
-#define    IIO_ICRBB_A               0x00400610    /* IO CRB Entry B_A       */
-#define    IIO_ICRBB_B               0x00400618    /* IO CRB Entry B_B       */
-#define    IIO_ICRBB_C               0x00400620    /* IO CRB Entry B_C       */
-#define    IIO_ICRBB_D               0x00400628    /* IO CRB Entry B_D       */
-#define    IIO_ICRBB_E               0x00400630    /* IO CRB Entry B_E       */
+#define		IIO_ICRBC_A		0x00400640	/* IO CRB Entry C_A */
+#define		IIO_ICRBC_B		0x00400648	/* IO CRB Entry C_B */
+#define		IIO_ICRBC_C		0x00400650	/* IO CRB Entry C_C */
+#define		IIO_ICRBC_D		0x00400658	/* IO CRB Entry C_D */
+#define		IIO_ICRBC_E		0x00400660	/* IO CRB Entry C_E */
 
-#define    IIO_ICRBC_A               0x00400640    /* IO CRB Entry C_A       */
-#define    IIO_ICRBC_B               0x00400648    /* IO CRB Entry C_B       */
-#define    IIO_ICRBC_C               0x00400650    /* IO CRB Entry C_C       */
-#define    IIO_ICRBC_D               0x00400658    /* IO CRB Entry C_D       */
-#define    IIO_ICRBC_E               0x00400660    /* IO CRB Entry C_E       */
+#define		IIO_ICRBD_A		0x00400670	/* IO CRB Entry D_A */
+#define		IIO_ICRBD_B		0x00400678	/* IO CRB Entry D_B */
+#define		IIO_ICRBD_C		0x00400680	/* IO CRB Entry D_C */
+#define		IIO_ICRBD_D		0x00400688	/* IO CRB Entry D_D */
+#define		IIO_ICRBD_E		0x00400690	/* IO CRB Entry D_E */
 
-#define    IIO_ICRBD_A               0x00400670    /* IO CRB Entry D_A       */
-#define    IIO_ICRBD_B               0x00400678    /* IO CRB Entry D_B       */
-#define    IIO_ICRBD_C               0x00400680    /* IO CRB Entry D_C       */
-#define    IIO_ICRBD_D               0x00400688    /* IO CRB Entry D_D       */
-#define    IIO_ICRBD_E               0x00400690    /* IO CRB Entry D_E       */
+#define		IIO_ICRBE_A		0x004006a0	/* IO CRB Entry E_A */
+#define		IIO_ICRBE_B		0x004006a8	/* IO CRB Entry E_B */
+#define		IIO_ICRBE_C		0x004006b0	/* IO CRB Entry E_C */
+#define		IIO_ICRBE_D		0x004006b8	/* IO CRB Entry E_D */
+#define		IIO_ICRBE_E		0x004006c0	/* IO CRB Entry E_E */
 
-#define    IIO_ICRBE_A               0x004006a0    /* IO CRB Entry E_A       */
-#define    IIO_ICRBE_B               0x004006a8    /* IO CRB Entry E_B       */
-#define    IIO_ICRBE_C               0x004006b0    /* IO CRB Entry E_C       */
-#define    IIO_ICRBE_D               0x004006b8    /* IO CRB Entry E_D       */
-#define    IIO_ICRBE_E               0x004006c0    /* IO CRB Entry E_E       */
+#define		IIO_ICSML		0x00400700	/* IO CRB Spurious Message Low */
+#define		IIO_ICSMM		0x00400708	/* IO CRB Spurious Message Middle */
+#define		IIO_ICSMH		0x00400710	/* IO CRB Spurious Message High */
 
-#define    IIO_ICSML                 0x00400700    /* IO CRB Spurious Message Low */
-#define    IIO_ICSMM                 0x00400708    /* IO CRB Spurious Message Middle */
-#define    IIO_ICSMH                 0x00400710    /* IO CRB Spurious Message High */
+#define		IIO_IDBSS		0x00400718	/* IO Debug Submenu Select */
 
-#define    IIO_IDBSS                 0x00400718    /* IO Debug Submenu Select */
+#define		IIO_IBLS0		0x00410000	/* IO BTE Length Status 0 */
+#define		IIO_IBSA0		0x00410008	/* IO BTE Source Address 0 */
+#define		IIO_IBDA0		0x00410010	/* IO BTE Destination Address 0 */
+#define		IIO_IBCT0		0x00410018	/* IO BTE Control Terminate 0 */
+#define		IIO_IBNA0		0x00410020	/* IO BTE Notification Address 0 */
+#define		IIO_IBIA0		0x00410028	/* IO BTE Interrupt Address 0 */
+#define		IIO_IBLS1		0x00420000	/* IO BTE Length Status 1 */
+#define		IIO_IBSA1		0x00420008	/* IO BTE Source Address 1 */
+#define		IIO_IBDA1		0x00420010	/* IO BTE Destination Address 1 */
+#define		IIO_IBCT1		0x00420018	/* IO BTE Control Terminate 1 */
+#define		IIO_IBNA1		0x00420020	/* IO BTE Notification Address 1 */
+#define		IIO_IBIA1		0x00420028	/* IO BTE Interrupt Address 1 */
 
-#define    IIO_IBLS0                 0x00410000    /* IO BTE Length Status 0 */
-#define    IIO_IBSA0                 0x00410008    /* IO BTE Source Address 0 */
-#define    IIO_IBDA0                 0x00410010    /* IO BTE Destination Address 0 */
-#define    IIO_IBCT0                 0x00410018    /* IO BTE Control Terminate 0 */
-#define    IIO_IBNA0                 0x00410020    /* IO BTE Notification Address 0 */
-#define    IIO_IBIA0                 0x00410028    /* IO BTE Interrupt Address 0 */
-#define    IIO_IBLS1                 0x00420000    /* IO BTE Length Status 1 */
-#define    IIO_IBSA1                 0x00420008    /* IO BTE Source Address 1 */
-#define    IIO_IBDA1                 0x00420010    /* IO BTE Destination Address 1 */
-#define    IIO_IBCT1                 0x00420018    /* IO BTE Control Terminate 1 */
-#define    IIO_IBNA1                 0x00420020    /* IO BTE Notification Address 1 */
-#define    IIO_IBIA1                 0x00420028    /* IO BTE Interrupt Address 1 */
-
-#define    IIO_IPCR                  0x00430000    /* IO Performance Control */
-#define    IIO_IPPR                  0x00430008    /* IO Performance Profiling */
-
+#define		IIO_IPCR		0x00430000	/* IO Performance Control */
+#define		IIO_IPPR		0x00430008	/* IO Performance Profiling */
 
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  This register echoes some information from the         *
  * LB_REV_ID register. It is available through Crosstalk as described   *
  * above. The REV_NUM and MFG_NUM fields receive their values from      *
  * the REVISION and MANUFACTURER fields in the LB_REV_ID register.      *
  * The PART_NUM field's value is the Crosstalk device ID number that    *
  * Steve Miller assigned to the SHub chip.                              *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_wid_u {
-	uint64_t	ii_wid_regval;
-	struct	{
-		uint64_t	w_rsvd_1		  :	 1;
-		uint64_t	w_mfg_num		  :	11;
-		uint64_t	w_part_num		  :	16;
-		uint64_t	w_rev_num		  :	 4;
-		uint64_t	w_rsvd			  :	32;
+	uint64_t ii_wid_regval;
+	struct {
+		uint64_t w_rsvd_1:1;
+		uint64_t w_mfg_num:11;
+		uint64_t w_part_num:16;
+		uint64_t w_rev_num:4;
+		uint64_t w_rsvd:32;
 	} ii_wid_fld_s;
 } ii_wid_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  The fields in this register are set upon detection of an error      *
  * and cleared by various mechanisms, as explained in the               *
  * description.                                                         *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_wstat_u {
-	uint64_t	ii_wstat_regval;
-	struct	{
-		uint64_t	w_pending		  :	 4;
-		uint64_t	w_xt_crd_to		  :	 1;
-		uint64_t	w_xt_tail_to		  :	 1;
-		uint64_t	w_rsvd_3		  :	 3;
-		uint64_t       w_tx_mx_rty               :      1;
-		uint64_t	w_rsvd_2		  :	 6;
-		uint64_t	w_llp_tx_cnt		  :	 8;
-		uint64_t	w_rsvd_1		  :	 8;
-		uint64_t	w_crazy			  :	 1;
-		uint64_t	w_rsvd			  :	31;
+	uint64_t ii_wstat_regval;
+	struct {
+		uint64_t w_pending:4;
+		uint64_t w_xt_crd_to:1;
+		uint64_t w_xt_tail_to:1;
+		uint64_t w_rsvd_3:3;
+		uint64_t w_tx_mx_rty:1;
+		uint64_t w_rsvd_2:6;
+		uint64_t w_llp_tx_cnt:8;
+		uint64_t w_rsvd_1:8;
+		uint64_t w_crazy:1;
+		uint64_t w_rsvd:31;
 	} ii_wstat_fld_s;
 } ii_wstat_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  This is a read-write enabled register. It controls     *
  * various aspects of the Crosstalk flow control.                       *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_wcr_u {
-	uint64_t	ii_wcr_regval;
-	struct	{
-		uint64_t	w_wid			  :	 4;
-		uint64_t	w_tag			  :	 1;
-		uint64_t	w_rsvd_1		  :	 8;
-		uint64_t	w_dst_crd		  :	 3;
-		uint64_t	w_f_bad_pkt		  :	 1;
-		uint64_t	w_dir_con		  :	 1;
-		uint64_t	w_e_thresh		  :	 5;
-		uint64_t	w_rsvd			  :	41;
+	uint64_t ii_wcr_regval;
+	struct {
+		uint64_t w_wid:4;
+		uint64_t w_tag:1;
+		uint64_t w_rsvd_1:8;
+		uint64_t w_dst_crd:3;
+		uint64_t w_f_bad_pkt:1;
+		uint64_t w_dir_con:1;
+		uint64_t w_e_thresh:5;
+		uint64_t w_rsvd:41;
 	} ii_wcr_fld_s;
 } ii_wcr_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  This register's value is a bit vector that guards      *
  * access to local registers within the II as well as to external       *
  * Crosstalk widgets. Each bit in the register corresponds to a         *
···
  * region ID bits are enabled in this same register. It can also be     *
  * accessed through the IAlias space by the local processors.           *
  * The reset value of this register allows access by all nodes.         *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ilapr_u {
-	uint64_t	ii_ilapr_regval;
-	struct  {
-		uint64_t	i_region                  :	64;
+	uint64_t ii_ilapr_regval;
+	struct {
+		uint64_t i_region:64;
 	} ii_ilapr_fld_s;
 } ii_ilapr_u_t;
 
-
-
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  A write to this register of the 64-bit value           *
  * "SGIrules" in ASCII, will cause the bit in the ILAPR register        *
  * corresponding to the region of the requestor to be set (allow        *
···
  * This register can also be accessed through the IAlias space.         *
  * However, this access will not change the access permissions in the   *
  * ILAPR.                                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ilapo_u {
-	uint64_t	ii_ilapo_regval;
-	struct	{
-		uint64_t	i_io_ovrride            :	64;
+	uint64_t ii_ilapo_regval;
+	struct {
+		uint64_t i_io_ovrride:64;
 	} ii_ilapo_fld_s;
 } ii_ilapo_u_t;
 
-
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register qualifies all the PIO and Graphics writes launched    *
  * from the SHUB towards a widget.                                      *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iowa_u {
-	uint64_t	ii_iowa_regval;
-	struct	{
-		uint64_t	i_w0_oac		  :	 1;
-		uint64_t	i_rsvd_1		  :	 7;
-                uint64_t       i_wx_oac                  :      8;
-		uint64_t	i_rsvd			  :	48;
+	uint64_t ii_iowa_regval;
+	struct {
+		uint64_t i_w0_oac:1;
+		uint64_t i_rsvd_1:7;
+		uint64_t i_wx_oac:8;
+		uint64_t i_rsvd:48;
 	} ii_iowa_fld_s;
 } ii_iowa_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  This register qualifies all the requests launched      *
  * from a widget towards the Shub. This register is intended to be      *
  * used by software in case of misbehaving widgets.                     *
- *                                                                      *
- *                                                                      *
+ *									*
+ *									*
  ************************************************************************/
 
 typedef union ii_iiwa_u {
-	uint64_t	ii_iiwa_regval;
-	struct  {
-		uint64_t	i_w0_iac                  :	 1;
-		uint64_t	i_rsvd_1		  :	 7;
-		uint64_t	i_wx_iac		  :	 8;
-		uint64_t	i_rsvd			  :	48;
+	uint64_t ii_iiwa_regval;
+	struct {
+		uint64_t i_w0_iac:1;
+		uint64_t i_rsvd_1:7;
+		uint64_t i_wx_iac:8;
+		uint64_t i_rsvd:48;
 	} ii_iiwa_fld_s;
 } ii_iiwa_u_t;
 
-
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  This register qualifies all the operations launched    *
  * from a widget towards the SHub. It allows individual access          *
  * control for up to 8 devices per widget. A device refers to           *
···
  * The bits in this field are set by writing a 1 to them. Incoming      *
  * replies from Crosstalk are not subject to this access control        *
  * mechanism.                                                           *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iidem_u {
-	uint64_t	ii_iidem_regval;
-	struct	{
-		uint64_t	i_w8_dxs		  :	 8;
-		uint64_t	i_w9_dxs		  :	 8;
-		uint64_t	i_wa_dxs		  :	 8;
-		uint64_t	i_wb_dxs		  :	 8;
-		uint64_t	i_wc_dxs		  :	 8;
-		uint64_t	i_wd_dxs		  :	 8;
-		uint64_t	i_we_dxs		  :	 8;
-		uint64_t	i_wf_dxs		  :	 8;
+	uint64_t ii_iidem_regval;
+	struct {
+		uint64_t i_w8_dxs:8;
+		uint64_t i_w9_dxs:8;
+		uint64_t i_wa_dxs:8;
+		uint64_t i_wb_dxs:8;
+		uint64_t i_wc_dxs:8;
+		uint64_t i_wd_dxs:8;
+		uint64_t i_we_dxs:8;
+		uint64_t i_wf_dxs:8;
 	} ii_iidem_fld_s;
 } ii_iidem_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register contains the various programmable fields necessary    *
  * for controlling and observing the LLP signals.                       *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ilcsr_u {
-	uint64_t	ii_ilcsr_regval;
-	struct  {
-		uint64_t	i_nullto                  :	 6;
-		uint64_t	i_rsvd_4		  :	 2;
-		uint64_t	i_wrmrst		  :	 1;
-		uint64_t	i_rsvd_3		  :	 1;
-		uint64_t	i_llp_en		  :	 1;
-		uint64_t	i_bm8			  :	 1;
-		uint64_t	i_llp_stat		  :	 2;
-		uint64_t	i_remote_power		  :	 1;
-		uint64_t	i_rsvd_2		  :	 1;
-		uint64_t	i_maxrtry		  :	10;
-		uint64_t	i_d_avail_sel		  :	 2;
-		uint64_t	i_rsvd_1		  :	 4;
-		uint64_t	i_maxbrst		  :	10;
-                uint64_t       i_rsvd                    :     22;
+	uint64_t ii_ilcsr_regval;
+	struct {
+		uint64_t i_nullto:6;
+		uint64_t i_rsvd_4:2;
+		uint64_t i_wrmrst:1;
+		uint64_t i_rsvd_3:1;
+		uint64_t i_llp_en:1;
+		uint64_t i_bm8:1;
+		uint64_t i_llp_stat:2;
+		uint64_t i_remote_power:1;
+		uint64_t i_rsvd_2:1;
+		uint64_t i_maxrtry:10;
+		uint64_t i_d_avail_sel:2;
+		uint64_t i_rsvd_1:4;
+		uint64_t i_maxbrst:10;
+		uint64_t i_rsvd:22;
 
 	} ii_ilcsr_fld_s;
 } ii_ilcsr_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This is simply a status registers that monitors the LLP error       *
- * rate.                                                                *
- *                                                                      *
+ * rate.								*
+ *									*
  ************************************************************************/
 
 typedef union ii_illr_u {
-	uint64_t	ii_illr_regval;
-	struct	{
-		uint64_t	i_sn_cnt		  :	16;
-		uint64_t	i_cb_cnt		  :	16;
-		uint64_t	i_rsvd			  :	32;
+	uint64_t ii_illr_regval;
+	struct {
+		uint64_t i_sn_cnt:16;
+		uint64_t i_cb_cnt:16;
+		uint64_t i_rsvd:32;
 	} ii_illr_fld_s;
 } ii_illr_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  All II-detected non-BTE error interrupts are           *
  * specified via this register.                                         *
  * NOTE: The PI interrupt register address is hardcoded in the II. If   *
···
  * PI_ID==1, then the II sends the interrupt request to address         *
  * offset 0x01A0_0090 within the local register address space of PI1    *
  * on the node specified by the NODE field.                             *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iidsr_u {
-	uint64_t	ii_iidsr_regval;
-	struct  {
-		uint64_t	i_level                   :	 8;
-		uint64_t	i_pi_id			  :	 1;
-		uint64_t	i_node			  :	11;
-		uint64_t       i_rsvd_3                  :      4;
-		uint64_t	i_enable		  :	 1;
-		uint64_t	i_rsvd_2		  :	 3;
-		uint64_t	i_int_sent		  :	 2;
-		uint64_t       i_rsvd_1                  :      2;
-		uint64_t	i_pi0_forward_int	  :	 1;
-		uint64_t	i_pi1_forward_int	  :	 1;
-		uint64_t	i_rsvd			  :	30;
+	uint64_t ii_iidsr_regval;
+	struct {
+		uint64_t i_level:8;
+		uint64_t i_pi_id:1;
+		uint64_t i_node:11;
+		uint64_t i_rsvd_3:4;
+		uint64_t i_enable:1;
+		uint64_t i_rsvd_2:3;
+		uint64_t i_int_sent:2;
+		uint64_t i_rsvd_1:2;
+		uint64_t i_pi0_forward_int:1;
+		uint64_t i_pi1_forward_int:1;
+		uint64_t i_rsvd:30;
 	} ii_iidsr_fld_s;
 } ii_iidsr_u_t;
 
-
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are two instances of this register. This register is used     *
  * for matching up the incoming responses from the graphics widget to   *
  * the processor that initiated the graphics operation. The             *
  * write-responses are converted to graphics credits and returned to    *
  * the processor so that the processor interface can manage the flow    *
  * control.                                                             *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_igfx0_u {
-	uint64_t	ii_igfx0_regval;
-	struct	{
-		uint64_t	i_w_num			  :	 4;
-		uint64_t       i_pi_id                   :      1;
-		uint64_t	i_n_num			  :	12;
-		uint64_t       i_p_num                   :      1;
-		uint64_t       i_rsvd                    :     46;
+	uint64_t ii_igfx0_regval;
+	struct {
+		uint64_t i_w_num:4;
+		uint64_t i_pi_id:1;
+		uint64_t i_n_num:12;
+		uint64_t i_p_num:1;
+		uint64_t i_rsvd:46;
 	} ii_igfx0_fld_s;
 } ii_igfx0_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are two instances of this register. This register is used     *
  * for matching up the incoming responses from the graphics widget to   *
  * the processor that initiated the graphics operation. The             *
  * write-responses are converted to graphics credits and returned to    *
  * the processor so that the processor interface can manage the flow    *
  * control.                                                             *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_igfx1_u {
-	uint64_t	ii_igfx1_regval;
-	struct  {
-		uint64_t	i_w_num			  :	 4;
-		uint64_t       i_pi_id                   :      1;
-		uint64_t	i_n_num			  :	12;
-		uint64_t       i_p_num                   :      1;
-		uint64_t       i_rsvd                    :     46;
+	uint64_t ii_igfx1_regval;
+	struct {
+		uint64_t i_w_num:4;
+		uint64_t i_pi_id:1;
+		uint64_t i_n_num:12;
+		uint64_t i_p_num:1;
+		uint64_t i_rsvd:46;
 	} ii_igfx1_fld_s;
 } ii_igfx1_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are two instances of this registers. These registers are      *
  * used as scratch registers for software use.                          *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iscr0_u {
-	uint64_t	ii_iscr0_regval;
-	struct  {
-		uint64_t	i_scratch                 :	64;
+	uint64_t ii_iscr0_regval;
+	struct {
+		uint64_t i_scratch:64;
 	} ii_iscr0_fld_s;
 } ii_iscr0_u_t;
 
-
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are two instances of this registers. These registers are      *
  * used as scratch registers for software use.                          *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iscr1_u {
-	uint64_t	ii_iscr1_regval;
-	struct  {
-		uint64_t	i_scratch                 :	64;
+	uint64_t ii_iscr1_regval;
+	struct {
+		uint64_t i_scratch:64;
 	} ii_iscr1_fld_s;
 } ii_iscr1_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are seven instances of translation table entry   *
  * registers. Each register maps a Shub Big Window to a 48-bit          *
  * address on Crosstalk.                                                *
···
  * Crosstalk space addressable by the Shub is thus the lower            *
  * 8-GBytes per widget (N-mode), only <SUP >7</SUP>/<SUB >32nds</SUB>   *
  * of this space can be accessed.                                       *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_itte1_u {
-	uint64_t	ii_itte1_regval;
-	struct  {
-		uint64_t	i_offset                  :	 5;
-		uint64_t	i_rsvd_1		  :	 3;
-		uint64_t	i_w_num			  :	 4;
-		uint64_t	i_iosp			  :	 1;
-		uint64_t	i_rsvd			  :	51;
+	uint64_t ii_itte1_regval;
+	struct {
+		uint64_t i_offset:5;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_w_num:4;
+		uint64_t i_iosp:1;
+		uint64_t i_rsvd:51;
 	} ii_itte1_fld_s;
 } ii_itte1_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are seven instances of translation table entry   *
  * registers. Each register maps a Shub Big Window to a 48-bit          *
  * address on Crosstalk.                                                *
···
  * Crosstalk space addressable by the Shub is thus the lower            *
  * 8-GBytes per widget (N-mode), only <SUP >7</SUP>/<SUB >32nds</SUB>   *
  * of this space can be accessed.                                       *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_itte2_u {
-	uint64_t	ii_itte2_regval;
-	struct	{
-		uint64_t	i_offset		  :	 5;
-		uint64_t	i_rsvd_1		  :	 3;
-		uint64_t	i_w_num			  :	 4;
-		uint64_t	i_iosp			  :	 1;
-		uint64_t       i_rsvd                    :     51;
+	uint64_t ii_itte2_regval;
+	struct {
+		uint64_t i_offset:5;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_w_num:4;
+		uint64_t i_iosp:1;
+		uint64_t i_rsvd:51;
 	} ii_itte2_fld_s;
 } ii_itte2_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are seven instances of translation table entry   *
  * registers. Each register maps a Shub Big Window to a 48-bit          *
  * address on Crosstalk.                                                *
···
  * Crosstalk space addressable by the SHub is thus the lower            *
  * 8-GBytes per widget (N-mode), only <SUP >7</SUP>/<SUB >32nds</SUB>   *
  * of this space can be accessed.                                       *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_itte3_u {
-	uint64_t	ii_itte3_regval;
-	struct  {
-		uint64_t	i_offset                  :	 5;
-		uint64_t       i_rsvd_1                  :      3;
-		uint64_t       i_w_num                   :      4;
-		uint64_t       i_iosp                    :      1;
-		uint64_t       i_rsvd                    :     51;
+	uint64_t ii_itte3_regval;
+	struct {
+		uint64_t i_offset:5;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_w_num:4;
+		uint64_t i_iosp:1;
+		uint64_t i_rsvd:51;
 	} ii_itte3_fld_s;
 } ii_itte3_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are seven instances of translation table entry   *
  * registers. Each register maps a SHub Big Window to a 48-bit          *
  * address on Crosstalk.                                                *
···
  * Crosstalk space addressable by the SHub is thus the lower            *
  * 8-GBytes per widget (N-mode), only <SUP >7</SUP>/<SUB >32nds</SUB>   *
  * of this space can be accessed.                                       *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_itte4_u {
-	uint64_t	ii_itte4_regval;
-	struct  {
-		uint64_t	i_offset                  :	 5;
-		uint64_t	i_rsvd_1		  :	 3;
-		uint64_t       i_w_num                   :      4;
-		uint64_t       i_iosp                    :      1;
-		uint64_t       i_rsvd                    :     51;
+	uint64_t ii_itte4_regval;
+	struct {
+		uint64_t i_offset:5;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_w_num:4;
+		uint64_t i_iosp:1;
+		uint64_t i_rsvd:51;
 	} ii_itte4_fld_s;
 } ii_itte4_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are seven instances of translation table entry   *
  * registers. Each register maps a SHub Big Window to a 48-bit          *
  * address on Crosstalk.                                                *
···
  * Crosstalk space addressable by the Shub is thus the lower            *
  * 8-GBytes per widget (N-mode), only <SUP >7</SUP>/<SUB >32nds</SUB>   *
  * of this space can be accessed.                                       *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_itte5_u {
-	uint64_t	ii_itte5_regval;
-	struct  {
-		uint64_t	i_offset                  :	 5;
-		uint64_t       i_rsvd_1                  :      3;
-		uint64_t       i_w_num                   :      4;
-		uint64_t       i_iosp                    :      1;
-		uint64_t       i_rsvd                    :     51;
+	uint64_t ii_itte5_regval;
+	struct {
+		uint64_t i_offset:5;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_w_num:4;
+		uint64_t i_iosp:1;
+		uint64_t i_rsvd:51;
 	} ii_itte5_fld_s;
 } ii_itte5_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are seven instances of translation table entry   *
  * registers. Each register maps a Shub Big Window to a 48-bit          *
  * address on Crosstalk.                                                *
···
  * Crosstalk space addressable by the Shub is thus the lower            *
  * 8-GBytes per widget (N-mode), only <SUP >7</SUP>/<SUB >32nds</SUB>   *
  * of this space can be accessed.                                       *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_itte6_u {
-	uint64_t	ii_itte6_regval;
-	struct  {
-		uint64_t	i_offset                  :	 5;
-		uint64_t       i_rsvd_1                  :      3;
-		uint64_t       i_w_num                   :      4;
-		uint64_t       i_iosp                    :      1;
-		uint64_t       i_rsvd                    :     51;
+	uint64_t ii_itte6_regval;
+	struct {
+		uint64_t i_offset:5;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_w_num:4;
+		uint64_t i_iosp:1;
+		uint64_t i_rsvd:51;
 	} ii_itte6_fld_s;
 } ii_itte6_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are seven instances of translation table entry   *
  * registers. Each register maps a Shub Big Window to a 48-bit          *
  * address on Crosstalk.                                                *
···
  * Crosstalk space addressable by the SHub is thus the lower            *
  * 8-GBytes per widget (N-mode), only <SUP >7</SUP>/<SUB >32nds</SUB>   *
  * of this space can be accessed.                                       *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_itte7_u {
-	uint64_t	ii_itte7_regval;
-	struct  {
-		uint64_t	i_offset                  :	 5;
-		uint64_t	i_rsvd_1		  :	 3;
-		uint64_t       i_w_num                   :      4;
-		uint64_t       i_iosp                    :      1;
-		uint64_t       i_rsvd                    :     51;
+	uint64_t ii_itte7_regval;
+	struct {
+		uint64_t i_offset:5;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_w_num:4;
+		uint64_t i_iosp:1;
+		uint64_t i_rsvd:51;
 	} ii_itte7_fld_s;
 } ii_itte7_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are 9 instances of this register, one per        *
  * actual widget in this implementation of SHub and Crossbow.           *
  * Note: Crossbow only has ports for Widgets 8 through F, widget 0      *
···
  * register; the write will correct the C field and capture its new     *
  * value in the internal register. Even if IECLR[E_PRB_x] is set, the   *
  * SPUR_WR bit will persist if IPRBx hasn't yet been written.           *
- * .                                                                    *
- *                                                                      *
+ * .    								*
+ *									*
  ************************************************************************/
 
 typedef union ii_iprb0_u {
-	uint64_t	ii_iprb0_regval;
-	struct  {
-		uint64_t	i_c                       :	 8;
-		uint64_t	i_na			  :	14;
-		uint64_t       i_rsvd_2                  :      2;
-		uint64_t	i_nb			  :	14;
-		uint64_t	i_rsvd_1		  :	 2;
-		uint64_t	i_m			  :	 2;
-		uint64_t	i_f			  :	 1;
-		uint64_t	i_of_cnt		  :	 5;
-		uint64_t	i_error			  :	 1;
-		uint64_t	i_rd_to			  :	 1;
-		uint64_t	i_spur_wr		  :	 1;
-		uint64_t	i_spur_rd		  :	 1;
-		uint64_t	i_rsvd			  :	11;
-		uint64_t	i_mult_err		  :	 1;
+	uint64_t ii_iprb0_regval;
+	struct {
+		uint64_t i_c:8;
+		uint64_t i_na:14;
+		uint64_t i_rsvd_2:2;
+		uint64_t i_nb:14;
+		uint64_t i_rsvd_1:2;
+		uint64_t i_m:2;
+		uint64_t i_f:1;
+		uint64_t i_of_cnt:5;
+		uint64_t i_error:1;
+		uint64_t i_rd_to:1;
+		uint64_t i_spur_wr:1;
+		uint64_t i_spur_rd:1;
+		uint64_t i_rsvd:11;
+		uint64_t i_mult_err:1;
 	} ii_iprb0_fld_s;
 } ii_iprb0_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are 9 instances of this register, one per        *
  * actual widget in this implementation of SHub and Crossbow.           *
  * Note: Crossbow only has ports for Widgets 8 through F, widget 0      *
···
  * register; the write will correct the C field and capture its new     *
  * value in the internal register. Even if IECLR[E_PRB_x] is set, the   *
  * SPUR_WR bit will persist if IPRBx hasn't yet been written.           *
- * .                                                                    *
- *                                                                      *
+ * .    								*
+ *									*
  ************************************************************************/
 
 typedef union ii_iprb8_u {
-	uint64_t	ii_iprb8_regval;
-	struct  {
-		uint64_t	i_c                       :	 8;
-		uint64_t	i_na			  :	14;
-		uint64_t       i_rsvd_2                  :      2;
-		uint64_t	i_nb			  :	14;
-		uint64_t       i_rsvd_1                  :      2;
-		uint64_t       i_m                       :      2;
-		uint64_t       i_f                       :      1;
-		uint64_t       i_of_cnt                  :      5;
-		uint64_t       i_error                   :      1;
-		uint64_t       i_rd_to                   :      1;
-		uint64_t       i_spur_wr                 :      1;
-		uint64_t	i_spur_rd		  :	 1;
-		uint64_t       i_rsvd                    :     11;
-		uint64_t	i_mult_err		  :	 1;
+	uint64_t ii_iprb8_regval;
+	struct {
+		uint64_t i_c:8;
+		uint64_t i_na:14;
+		uint64_t i_rsvd_2:2;
+		uint64_t i_nb:14;
+		uint64_t i_rsvd_1:2;
+		uint64_t i_m:2;
+		uint64_t i_f:1;
+		uint64_t i_of_cnt:5;
+		uint64_t i_error:1;
+		uint64_t i_rd_to:1;
+		uint64_t i_spur_wr:1;
+		uint64_t i_spur_rd:1;
+		uint64_t i_rsvd:11;
+		uint64_t i_mult_err:1;
 	} ii_iprb8_fld_s;
 } ii_iprb8_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are 9 instances of this register, one per        *
  * actual widget in this implementation of SHub and Crossbow.           *
  * Note: Crossbow only has ports for Widgets 8 through F, widget 0      *
···
  * register; the write will correct the C field and capture its new     *
  * value in the internal register. Even if IECLR[E_PRB_x] is set, the   *
  * SPUR_WR bit will persist if IPRBx hasn't yet been written.           *
- * .                                                                    *
- *                                                                      *
+ * .    								*
+ *									*
  ************************************************************************/
 
 typedef union ii_iprb9_u {
-	uint64_t	ii_iprb9_regval;
-	struct	{
-		uint64_t	i_c			  :	 8;
-		uint64_t	i_na			  :	14;
-		uint64_t	i_rsvd_2		  :	 2;
-		uint64_t	i_nb			  :	14;
-		uint64_t	i_rsvd_1		  :	 2;
-		uint64_t	i_m			  :	 2;
-		uint64_t	i_f			  :	 1;
-		uint64_t	i_of_cnt		  :	 5;
-		uint64_t	i_error			  :	 1;
-		uint64_t	i_rd_to			  :	 1;
-		uint64_t	i_spur_wr		  :	 1;
-		uint64_t	i_spur_rd		  :	 1;
-		uint64_t	i_rsvd			  :	11;
-		uint64_t	i_mult_err		  :	 1;
+	uint64_t ii_iprb9_regval;
+	struct {
+		uint64_t i_c:8;
+		uint64_t i_na:14;
+		uint64_t i_rsvd_2:2;
+		uint64_t i_nb:14;
+		uint64_t i_rsvd_1:2;
+		uint64_t i_m:2;
+		uint64_t i_f:1;
+		uint64_t i_of_cnt:5;
+		uint64_t i_error:1;
+		uint64_t i_rd_to:1;
+		uint64_t i_spur_wr:1;
+		uint64_t i_spur_rd:1;
+		uint64_t i_rsvd:11;
+		uint64_t i_mult_err:1;
 	} ii_iprb9_fld_s;
 } ii_iprb9_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are 9 instances of this register, one per        *
  * actual widget in this implementation of SHub and Crossbow.        *
  * Note: Crossbow only has ports for Widgets 8 through F, widget 0      *
···
  * register; the write will correct the C field and capture its new     *
  * value in the internal register. Even if IECLR[E_PRB_x] is set, the   *
  * SPUR_WR bit will persist if IPRBx hasn't yet been written.           *
- *                                                                      *
- *                                                                      *
+ *									*
+ *									*
  ************************************************************************/
 
 typedef union ii_iprba_u {
-	uint64_t	ii_iprba_regval;
-	struct  {
-		uint64_t	i_c                       :	 8;
-		uint64_t	i_na			  :	14;
-		uint64_t       i_rsvd_2                  :      2;
-		uint64_t	i_nb			  :	14;
-		uint64_t	i_rsvd_1		  :	 2;
-		uint64_t	i_m			  :	 2;
-		uint64_t	i_f			  :	 1;
-		uint64_t	i_of_cnt		  :	 5;
-		uint64_t	i_error			  :	 1;
-		uint64_t	i_rd_to			  :	 1;
-		uint64_t	i_spur_wr		  :	 1;
-		uint64_t	i_spur_rd		  :	 1;
-		uint64_t	i_rsvd			  :	11;
-		uint64_t	i_mult_err		  :	 1;
+	uint64_t ii_iprba_regval;
+	struct {
+		uint64_t i_c:8;
+		uint64_t i_na:14;
+		uint64_t i_rsvd_2:2;
+		uint64_t i_nb:14;
+		uint64_t i_rsvd_1:2;
+		uint64_t i_m:2;
+		uint64_t i_f:1;
+		uint64_t i_of_cnt:5;
+		uint64_t i_error:1;
+		uint64_t i_rd_to:1;
+		uint64_t i_spur_wr:1;
+		uint64_t i_spur_rd:1;
+		uint64_t i_rsvd:11;
+		uint64_t i_mult_err:1;
 	} ii_iprba_fld_s;
 } ii_iprba_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are 9 instances of this register, one per        *
  * actual widget in this implementation of SHub and Crossbow.           *
  * Note: Crossbow only has ports for Widgets 8 through F, widget 0      *
···
  * register; the write will correct the C field and capture its new     *
  * value in the internal register. Even if IECLR[E_PRB_x] is set, the   *
  * SPUR_WR bit will persist if IPRBx hasn't yet been written.           *
- * .                                                                    *
- *                                                                      *
+ * .    								*
+ *									*
  ************************************************************************/
 
 typedef union ii_iprbb_u {
-	uint64_t	ii_iprbb_regval;
-	struct	{
-		uint64_t	i_c			  :	 8;
-		uint64_t	i_na			  :	14;
-		uint64_t	i_rsvd_2		  :	 2;
-		uint64_t	i_nb			  :	14;
-		uint64_t	i_rsvd_1		  :	 2;
-		uint64_t	i_m			  :	 2;
-		uint64_t	i_f			  :	 1;
-		uint64_t	i_of_cnt		  :	 5;
-		uint64_t	i_error			  :	 1;
-		uint64_t	i_rd_to			  :	 1;
-		uint64_t	i_spur_wr		  :	 1;
-		uint64_t	i_spur_rd		  :	 1;
-		uint64_t	i_rsvd			  :	11;
-		uint64_t	i_mult_err		  :	 1;
+	uint64_t ii_iprbb_regval;
+	struct {
+		uint64_t i_c:8;
+		uint64_t i_na:14;
+		uint64_t i_rsvd_2:2;
+		uint64_t i_nb:14;
+		uint64_t i_rsvd_1:2;
+		uint64_t i_m:2;
+		uint64_t i_f:1;
+		uint64_t i_of_cnt:5;
+		uint64_t i_error:1;
+		uint64_t i_rd_to:1;
+		uint64_t i_spur_wr:1;
+		uint64_t i_spur_rd:1;
+		uint64_t i_rsvd:11;
+		uint64_t i_mult_err:1;
 	} ii_iprbb_fld_s;
 } ii_iprbb_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are 9 instances of this register, one per        *
  * actual widget in this implementation of SHub and Crossbow.           *
  * Note: Crossbow only has ports for Widgets 8 through F, widget 0      *
···
  * register; the write will correct the C field and capture its new     *
  * value in the internal register. Even if IECLR[E_PRB_x] is set, the   *
  * SPUR_WR bit will persist if IPRBx hasn't yet been written.           *
- * .                                                                    *
- *                                                                      *
+ * .    								*
+ *									*
  ************************************************************************/
 
 typedef union ii_iprbc_u {
-	uint64_t	ii_iprbc_regval;
-	struct	{
-		uint64_t	i_c			  :	 8;
-		uint64_t	i_na			  :	14;
-		uint64_t	i_rsvd_2		  :	 2;
-		uint64_t	i_nb			  :	14;
-		uint64_t	i_rsvd_1		  :	 2;
-		uint64_t	i_m			  :	 2;
-		uint64_t	i_f			  :	 1;
-		uint64_t	i_of_cnt		  :	 5;
-		uint64_t	i_error			  :	 1;
-		uint64_t	i_rd_to			  :	 1;
-		uint64_t	i_spur_wr		  :	 1;
-		uint64_t	i_spur_rd		  :	 1;
-		uint64_t	i_rsvd			  :	11;
-		uint64_t	i_mult_err		  :	 1;
+	uint64_t ii_iprbc_regval;
+	struct {
+		uint64_t i_c:8;
+		uint64_t i_na:14;
+		uint64_t i_rsvd_2:2;
+		uint64_t i_nb:14;
+		uint64_t i_rsvd_1:2;
+		uint64_t i_m:2;
+		uint64_t i_f:1;
+		uint64_t i_of_cnt:5;
+		uint64_t i_error:1;
+		uint64_t i_rd_to:1;
+		uint64_t i_spur_wr:1;
+		uint64_t i_spur_rd:1;
+		uint64_t i_rsvd:11;
+		uint64_t i_mult_err:1;
 	} ii_iprbc_fld_s;
 } ii_iprbc_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are 9 instances of this register, one per        *
  * actual widget in this implementation of SHub and Crossbow.           *
  * Note: Crossbow only has ports for Widgets 8 through F, widget 0      *
···
  * register; the write will correct the C field and capture its new     *
  * value in the internal register. Even if IECLR[E_PRB_x] is set, the   *
  * SPUR_WR bit will persist if IPRBx hasn't yet been written.           *
- * .                                                                    *
- *                                                                      *
+ * .    								*
+ *									*
  ************************************************************************/
 
 typedef union ii_iprbd_u {
-	uint64_t	ii_iprbd_regval;
-	struct	{
-		uint64_t	i_c			  :	 8;
-		uint64_t	i_na			  :	14;
-		uint64_t	i_rsvd_2		  :	 2;
-		uint64_t	i_nb			  :	14;
-		uint64_t	i_rsvd_1		  :	 2;
-		uint64_t	i_m			  :	 2;
-		uint64_t	i_f			  :	 1;
-		uint64_t	i_of_cnt		  :	 5;
-		uint64_t	i_error			  :	 1;
-		uint64_t	i_rd_to			  :	 1;
-		uint64_t	i_spur_wr		  :	 1;
-		uint64_t	i_spur_rd		  :	 1;
-		uint64_t	i_rsvd			  :	11;
-		uint64_t	i_mult_err		  :	 1;
+	uint64_t ii_iprbd_regval;
+	struct {
+		uint64_t i_c:8;
+		uint64_t i_na:14;
+		uint64_t i_rsvd_2:2;
+		uint64_t i_nb:14;
+		uint64_t i_rsvd_1:2;
+		uint64_t i_m:2;
+		uint64_t i_f:1;
+		uint64_t i_of_cnt:5;
+		uint64_t i_error:1;
+		uint64_t i_rd_to:1;
+		uint64_t i_spur_wr:1;
+		uint64_t i_spur_rd:1;
+		uint64_t i_rsvd:11;
+		uint64_t i_mult_err:1;
 	} ii_iprbd_fld_s;
 } ii_iprbd_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are 9 instances of this register, one per        *
  * actual widget in this implementation of SHub and Crossbow.           *
  * Note: Crossbow only has ports for Widgets 8 through F, widget 0      *
···
  * register; the write will correct the C field and capture its new     *
  * value in the internal register. Even if IECLR[E_PRB_x] is set, the   *
  * SPUR_WR bit will persist if IPRBx hasn't yet been written.           *
- * .                                                                    *
- *                                                                      *
+ * .    								*
+ *									*
  ************************************************************************/
 
 typedef union ii_iprbe_u {
-	uint64_t	ii_iprbe_regval;
-	struct	{
-		uint64_t	i_c			  :	 8;
-		uint64_t	i_na			  :	14;
-		uint64_t	i_rsvd_2		  :	 2;
-		uint64_t	i_nb			  :	14;
-		uint64_t	i_rsvd_1		  :	 2;
-		uint64_t	i_m			  :	 2;
-		uint64_t	i_f			  :	 1;
-		uint64_t	i_of_cnt		  :	 5;
-		uint64_t	i_error			  :	 1;
-		uint64_t	i_rd_to			  :	 1;
-		uint64_t	i_spur_wr		  :	 1;
-		uint64_t	i_spur_rd		  :	 1;
-		uint64_t	i_rsvd			  :	11;
-		uint64_t	i_mult_err		  :	 1;
+	uint64_t ii_iprbe_regval;
+	struct {
+		uint64_t i_c:8;
+		uint64_t i_na:14;
+		uint64_t i_rsvd_2:2;
+		uint64_t i_nb:14;
+		uint64_t i_rsvd_1:2;
+		uint64_t i_m:2;
+		uint64_t i_f:1;
+		uint64_t i_of_cnt:5;
+		uint64_t i_error:1;
+		uint64_t i_rd_to:1;
+		uint64_t i_spur_wr:1;
+		uint64_t i_spur_rd:1;
+		uint64_t i_rsvd:11;
+		uint64_t i_mult_err:1;
 	} ii_iprbe_fld_s;
 } ii_iprbe_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are 9 instances of this register, one per        *
  * actual widget in this implementation of Shub and Crossbow.           *
  * Note: Crossbow only has ports for Widgets 8 through F, widget 0      *
···
  * register; the write will correct the C field and capture its new     *
  * value in the internal register. Even if IECLR[E_PRB_x] is set, the   *
  * SPUR_WR bit will persist if IPRBx hasn't yet been written.           *
- * .                                                                    *
- *                                                                      *
+ * .    								*
+ *									*
  ************************************************************************/
 
 typedef union ii_iprbf_u {
-        uint64_t       ii_iprbf_regval;
-        struct  {
-                uint64_t       i_c                       :      8;
-                uint64_t       i_na                      :     14;
-                uint64_t       i_rsvd_2                  :      2;
-                uint64_t       i_nb                      :     14;
-                uint64_t       i_rsvd_1                  :      2;
-                uint64_t       i_m                       :      2;
-                uint64_t       i_f                       :      1;
-                uint64_t       i_of_cnt                  :      5;
-                uint64_t       i_error                   :      1;
-                uint64_t       i_rd_to                   :      1;
-                uint64_t       i_spur_wr                 :      1;
-                uint64_t       i_spur_rd                 :      1;
-                uint64_t       i_rsvd                    :     11;
-                uint64_t       i_mult_err                :      1;
-        } ii_iprbe_fld_s;
+	uint64_t ii_iprbf_regval;
+	struct {
+		uint64_t i_c:8;
+		uint64_t i_na:14;
+		uint64_t i_rsvd_2:2;
+		uint64_t i_nb:14;
+		uint64_t i_rsvd_1:2;
+		uint64_t i_m:2;
+		uint64_t i_f:1;
+		uint64_t i_of_cnt:5;
+		uint64_t i_error:1;
+		uint64_t i_rd_to:1;
+		uint64_t i_spur_wr:1;
+		uint64_t i_spur_rd:1;
+		uint64_t i_rsvd:11;
+		uint64_t i_mult_err:1;
+	} ii_iprbe_fld_s;
 } ii_iprbf_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register specifies the timeout value to use for monitoring     *
  * Crosstalk credits which are used outbound to Crosstalk. An           *
  * internal counter called the Crosstalk Credit Timeout Counter         *
···
  * Crosstalk Credit Timeout has occurred. The internal counter is not   *
  * readable from software, and stops counting at its maximum value,     *
  * so it cannot cause more than one interrupt.                          *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ixcc_u {
-	uint64_t	ii_ixcc_regval;
-	struct  {
-		uint64_t	i_time_out                :	26;
-		uint64_t	i_rsvd			  :	38;
+	uint64_t ii_ixcc_regval;
+	struct {
+		uint64_t i_time_out:26;
+		uint64_t i_rsvd:38;
 	} ii_ixcc_fld_s;
 } ii_ixcc_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  This register qualifies all the PIO and DMA            *
  * operations launched from widget 0 towards the SHub. In               *
  * addition, it also qualifies accesses by the BTE streams.             *
···
  * the Wx_IAC field. The bits in this field are set by writing a 1 to   *
  * them. Incoming replies from Crosstalk are not subject to this        *
  * access control mechanism.                                            *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_imem_u {
-	uint64_t	ii_imem_regval;
-	struct  {
-		uint64_t	i_w0_esd                  :	 1;
-		uint64_t	i_rsvd_3		  :	 3;
-		uint64_t	i_b0_esd		  :	 1;
-		uint64_t	i_rsvd_2		  :	 3;
-		uint64_t	i_b1_esd		  :	 1;
-		uint64_t	i_rsvd_1		  :	 3;
-		uint64_t	i_clr_precise		  :	 1;
-		uint64_t       i_rsvd                    :     51;
+	uint64_t ii_imem_regval;
+	struct {
+		uint64_t i_w0_esd:1;
+		uint64_t i_rsvd_3:3;
+		uint64_t i_b0_esd:1;
+		uint64_t i_rsvd_2:3;
+		uint64_t i_b1_esd:1;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_clr_precise:1;
+		uint64_t i_rsvd:51;
 	} ii_imem_fld_s;
 } ii_imem_u_t;
 
-
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  This register specifies the timeout value to use for   *
  * monitoring Crosstalk tail flits coming into the Shub in the          *
  * TAIL_TO field. An internal counter associated with this register     *
···
  * the value in the RRSP_TO field, a Read Response Timeout has          *
  * occurred, and error handling occurs as described in the Error        *
  * Handling section of this document.                                   *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ixtt_u {
-	uint64_t	ii_ixtt_regval;
-	struct  {
-		uint64_t	i_tail_to                 :	26;
-		uint64_t	i_rsvd_1		  :	 6;
-		uint64_t	i_rrsp_ps		  :	23;
-		uint64_t	i_rrsp_to		  :	 5;
-		uint64_t	i_rsvd			  :	 4;
+	uint64_t ii_ixtt_regval;
+	struct {
+		uint64_t i_tail_to:26;
+		uint64_t i_rsvd_1:6;
+		uint64_t i_rrsp_ps:23;
+		uint64_t i_rrsp_to:5;
+		uint64_t i_rsvd:4;
 	} ii_ixtt_fld_s;
 } ii_ixtt_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  Writing a 1 to the fields of this register clears the appropriate   *
  * error bits in other areas of SHub. Note that when the                *
  * E_PRB_x bits are used to clear error bits in PRB registers,          *
  * SPUR_RD and SPUR_WR may persist, because they require additional     *
  * action to clear them. See the IPRBx and IXSS Register                *
  * specifications.                                                      *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ieclr_u {
-	uint64_t	ii_ieclr_regval;
-	struct  {
-		uint64_t	i_e_prb_0                 :	 1;
-		uint64_t	i_rsvd			  :	 7;
-		uint64_t	i_e_prb_8		  :	 1;
-		uint64_t	i_e_prb_9		  :	 1;
-		uint64_t	i_e_prb_a		  :	 1;
-		uint64_t	i_e_prb_b		  :	 1;
-		uint64_t	i_e_prb_c		  :	 1;
-		uint64_t	i_e_prb_d		  :	 1;
-		uint64_t	i_e_prb_e		  :	 1;
-		uint64_t	i_e_prb_f		  :	 1;
-		uint64_t	i_e_crazy		  :	 1;
-		uint64_t	i_e_bte_0		  :	 1;
-		uint64_t	i_e_bte_1		  :	 1;
-		uint64_t	i_reserved_1		  :	10;
-		uint64_t	i_spur_rd_hdr		  :	 1;
-		uint64_t	i_cam_intr_to		  :	 1;
-		uint64_t	i_cam_overflow		  :	 1;
-		uint64_t	i_cam_read_miss		  :	 1;
-		uint64_t	i_ioq_rep_underflow	  :	 1;
-		uint64_t	i_ioq_req_underflow	  :	 1;
-		uint64_t	i_ioq_rep_overflow	  :	 1;
-		uint64_t	i_ioq_req_overflow	  :	 1;
-		uint64_t	i_iiq_rep_overflow	  :	 1;
-		uint64_t	i_iiq_req_overflow	  :	 1;
-		uint64_t	i_ii_xn_rep_cred_overflow :	 1;
-		uint64_t	i_ii_xn_req_cred_overflow :	 1;
-		uint64_t	i_ii_xn_invalid_cmd	  :	 1;
-		uint64_t	i_xn_ii_invalid_cmd	  :	 1;
-		uint64_t	i_reserved_2		  :	21;
+	uint64_t ii_ieclr_regval;
+	struct {
+		uint64_t i_e_prb_0:1;
+		uint64_t i_rsvd:7;
+		uint64_t i_e_prb_8:1;
+		uint64_t i_e_prb_9:1;
+		uint64_t i_e_prb_a:1;
+		uint64_t i_e_prb_b:1;
+		uint64_t i_e_prb_c:1;
+		uint64_t i_e_prb_d:1;
+		uint64_t i_e_prb_e:1;
+		uint64_t i_e_prb_f:1;
+		uint64_t i_e_crazy:1;
+		uint64_t i_e_bte_0:1;
+		uint64_t i_e_bte_1:1;
+		uint64_t i_reserved_1:10;
+		uint64_t i_spur_rd_hdr:1;
+		uint64_t i_cam_intr_to:1;
+		uint64_t i_cam_overflow:1;
+		uint64_t i_cam_read_miss:1;
+		uint64_t i_ioq_rep_underflow:1;
+		uint64_t i_ioq_req_underflow:1;
+		uint64_t i_ioq_rep_overflow:1;
+		uint64_t i_ioq_req_overflow:1;
+		uint64_t i_iiq_rep_overflow:1;
+		uint64_t i_iiq_req_overflow:1;
+		uint64_t i_ii_xn_rep_cred_overflow:1;
+		uint64_t i_ii_xn_req_cred_overflow:1;
+		uint64_t i_ii_xn_invalid_cmd:1;
+		uint64_t i_xn_ii_invalid_cmd:1;
+		uint64_t i_reserved_2:21;
 	} ii_ieclr_fld_s;
 } ii_ieclr_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register controls both BTEs. SOFT_RESET is intended for        *
  * recovery after an error. COUNT controls the total number of CRBs     *
  * that both BTEs (combined) can use, which affects total BTE           *
  * bandwidth.                                                           *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ibcr_u {
-	uint64_t	ii_ibcr_regval;
-	struct  {
-		uint64_t	i_count                   :	 4;
-		uint64_t	i_rsvd_1		  :	 4;
-		uint64_t	i_soft_reset		  :	 1;
-		uint64_t	i_rsvd			  :	55;
+	uint64_t ii_ibcr_regval;
+	struct {
+		uint64_t i_count:4;
+		uint64_t i_rsvd_1:4;
+		uint64_t i_soft_reset:1;
+		uint64_t i_rsvd:55;
 	} ii_ibcr_fld_s;
 } ii_ibcr_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register contains the header of a spurious read response       *
  * received from Crosstalk. A spurious read response is defined as a    *
  * read response received by II from a widget for which (1) the SIDN    *
···
  * will be set. Any SPUR_RD bits in any other PRB registers indicate    *
  * spurious messages from other widets which were detected after the    *
  * header was captured..                                                *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ixsm_u {
-	uint64_t	ii_ixsm_regval;
-	struct  {
-		uint64_t	i_byte_en                 :	32;
-		uint64_t	i_reserved		  :	 1;
-		uint64_t	i_tag			  :	 3;
-		uint64_t	i_alt_pactyp		  :	 4;
-		uint64_t	i_bo			  :	 1;
-		uint64_t	i_error			  :	 1;
-		uint64_t	i_vbpm			  :	 1;
-		uint64_t	i_gbr			  :	 1;
-		uint64_t	i_ds			  :	 2;
-		uint64_t	i_ct			  :	 1;
-		uint64_t	i_tnum			  :	 5;
-		uint64_t	i_pactyp		  :	 4;
-		uint64_t	i_sidn			  :	 4;
-		uint64_t	i_didn			  :	 4;
+	uint64_t ii_ixsm_regval;
+	struct {
+		uint64_t i_byte_en:32;
+		uint64_t i_reserved:1;
+		uint64_t i_tag:3;
+		uint64_t i_alt_pactyp:4;
+		uint64_t i_bo:1;
+		uint64_t i_error:1;
+		uint64_t i_vbpm:1;
+		uint64_t i_gbr:1;
+		uint64_t i_ds:2;
+		uint64_t i_ct:1;
+		uint64_t i_tnum:5;
+		uint64_t i_pactyp:4;
+		uint64_t i_sidn:4;
+		uint64_t i_didn:4;
 	} ii_ixsm_fld_s;
 } ii_ixsm_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register contains the sideband bits of a spurious read         *
  * response received from Crosstalk.                                    *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ixss_u {
-	uint64_t	ii_ixss_regval;
-	struct  {
-		uint64_t	i_sideband                :	 8;
-		uint64_t	i_rsvd			  :	55;
-		uint64_t	i_valid			  :	 1;
+	uint64_t ii_ixss_regval;
+	struct {
+		uint64_t i_sideband:8;
+		uint64_t i_rsvd:55;
+		uint64_t i_valid:1;
 	} ii_ixss_fld_s;
 } ii_ixss_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register enables software to access the II LLP's test port.    *
  * Refer to the LLP 2.5 documentation for an explanation of the test    *
  * port. Software can write to this register to program the values      *
···
  * TestMask and TestSeed). Similarly, software can read from this       *
  * register to obtain the values of the test port's status outputs      *
  * (TestCBerr, TestValid and TestData).                                 *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ilct_u {
-	uint64_t	ii_ilct_regval;
-	struct  {
-		uint64_t	i_test_seed               :	20;
-		uint64_t	i_test_mask               :	 8;
-		uint64_t	i_test_data               :	20;
-		uint64_t	i_test_valid              :	 1;
-		uint64_t	i_test_cberr              :	 1;
-		uint64_t	i_test_flit               :	 3;
-		uint64_t	i_test_clear              :	 1;
-		uint64_t	i_test_err_capture        :	 1;
-		uint64_t	i_rsvd                    :	 9;
+	uint64_t ii_ilct_regval;
+	struct {
+		uint64_t i_test_seed:20;
+		uint64_t i_test_mask:8;
+		uint64_t i_test_data:20;
+		uint64_t i_test_valid:1;
+		uint64_t i_test_cberr:1;
+		uint64_t i_test_flit:3;
+		uint64_t i_test_clear:1;
+		uint64_t i_test_err_capture:1;
+		uint64_t i_rsvd:9;
 	} ii_ilct_fld_s;
 } ii_ilct_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  If the II detects an illegal incoming Duplonet packet (request or   *
  * reply) when VALID==0 in the IIEPH1 register, then it saves the       *
  * contents of the packet's header flit in the IIEPH1 and IIEPH2        *
···
  * packet when VALID==1 in the IIEPH1 register, then it merely sets     *
  * the OVERRUN bit to indicate that a subsequent error has happened,    *
  * and does nothing further.                                            *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iieph1_u {
-	uint64_t	ii_iieph1_regval;
-	struct	{
-		uint64_t	i_command		  :	 7;
-		uint64_t	i_rsvd_5		  :	 1;
-		uint64_t	i_suppl			  :	14;
-		uint64_t	i_rsvd_4		  :	 1;
-		uint64_t	i_source		  :	14;
-		uint64_t	i_rsvd_3		  :	 1;
-		uint64_t	i_err_type		  :	 4;
-		uint64_t	i_rsvd_2		  :	 4;
-		uint64_t	i_overrun		  :	 1;
-		uint64_t	i_rsvd_1		  :	 3;
-		uint64_t	i_valid			  :	 1;
-		uint64_t	i_rsvd			  :	13;
+	uint64_t ii_iieph1_regval;
+	struct {
+		uint64_t i_command:7;
+		uint64_t i_rsvd_5:1;
+		uint64_t i_suppl:14;
+		uint64_t i_rsvd_4:1;
+		uint64_t i_source:14;
+		uint64_t i_rsvd_3:1;
+		uint64_t i_err_type:4;
+		uint64_t i_rsvd_2:4;
+		uint64_t i_overrun:1;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_valid:1;
+		uint64_t i_rsvd:13;
 	} ii_iieph1_fld_s;
 } ii_iieph1_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register holds the Address field from the header flit of an    *
  * incoming erroneous Duplonet packet, along with the tail bit which    *
  * accompanied this header flit. This register is essentially an        *
  * extension of IIEPH1. Two registers were necessary because the 64     *
  * bits available in only a single register were insufficient to        *
  * capture the entire header flit of an erroneous packet.               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iieph2_u {
-	uint64_t	ii_iieph2_regval;
-	struct  {
-		uint64_t	i_rsvd_0		  :	 3;
-		uint64_t	i_address                 :	47;
-		uint64_t	i_rsvd_1		  :	10;
-		uint64_t	i_tail			  :	 1;
-		uint64_t	i_rsvd			  :	 3;
+	uint64_t ii_iieph2_regval;
+	struct {
+		uint64_t i_rsvd_0:3;
+		uint64_t i_address:47;
+		uint64_t i_rsvd_1:10;
+		uint64_t i_tail:1;
+		uint64_t i_rsvd:3;
 	} ii_iieph2_fld_s;
 } ii_iieph2_u_t;
 
-
 /******************************/
 
-
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register's value is a bit vector that guards access from SXBs  *
  * to local registers within the II as well as to external Crosstalk    *
  * widgets								*
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_islapr_u {
-	uint64_t	ii_islapr_regval;
-	struct  {
-		uint64_t	i_region		  :	64;
+	uint64_t ii_islapr_regval;
+	struct {
+		uint64_t i_region:64;
 	} ii_islapr_fld_s;
 } ii_islapr_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  A write to this register of the 56-bit value "Pup+Bun" will cause	*
  * the bit in the ISLAPR register corresponding to the region of the	*
  * requestor to be set (access allowed).				(
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_islapo_u {
-	uint64_t	ii_islapo_regval;
-	struct  {
-		uint64_t	i_io_sbx_ovrride	  :	56;
-		uint64_t	i_rsvd			  :	 8;
+	uint64_t ii_islapo_regval;
+	struct {
+		uint64_t i_io_sbx_ovrride:56;
+		uint64_t i_rsvd:8;
 	} ii_islapo_fld_s;
 } ii_islapo_u_t;
 
 /************************************************************************
- *                                                                      *
+ *									*
  *  Determines how long the wrapper will wait aftr an interrupt is	*
  * initially issued from the II before it times out the outstanding	*
  * interrupt and drops it from the interrupt queue.			* 
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iwi_u {
-	uint64_t	ii_iwi_regval;
-	struct  {
-		uint64_t	i_prescale		  :	24;
-		uint64_t	i_rsvd			  :	 8;
-		uint64_t	i_timeout		  :	 8;
-		uint64_t	i_rsvd1			  :	 8;
-		uint64_t	i_intrpt_retry_period	  :	 8;
-		uint64_t	i_rsvd2			  :	 8;
+	uint64_t ii_iwi_regval;
+	struct {
+		uint64_t i_prescale:24;
+		uint64_t i_rsvd:8;
+		uint64_t i_timeout:8;
+		uint64_t i_rsvd1:8;
+		uint64_t i_intrpt_retry_period:8;
+		uint64_t i_rsvd2:8;
 	} ii_iwi_fld_s;
 } ii_iwi_u_t;
 
 /************************************************************************
- *                                                                      *
+ *									*
  *  Log errors which have occurred in the II wrapper. The errors are	*
  * cleared by writing to the IECLR register.				* 
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iwel_u {
-	uint64_t	ii_iwel_regval;
-	struct  {
-		uint64_t	i_intr_timed_out	  :	 1;
-		uint64_t	i_rsvd			  :	 7;
-		uint64_t	i_cam_overflow		  :	 1;
-		uint64_t	i_cam_read_miss		  :	 1;
-		uint64_t	i_rsvd1			  :	 2;
-		uint64_t	i_ioq_rep_underflow	  :	 1;
-		uint64_t	i_ioq_req_underflow	  :	 1;
-		uint64_t	i_ioq_rep_overflow	  :	 1;
-		uint64_t	i_ioq_req_overflow	  :	 1;
-		uint64_t	i_iiq_rep_overflow	  :	 1;
-		uint64_t	i_iiq_req_overflow	  :	 1;
-		uint64_t	i_rsvd2			  :	 6;
-		uint64_t	i_ii_xn_rep_cred_over_under:	 1;
-		uint64_t	i_ii_xn_req_cred_over_under:	 1;
-		uint64_t	i_rsvd3			  :	 6;
-		uint64_t	i_ii_xn_invalid_cmd	  :	 1;
-		uint64_t	i_xn_ii_invalid_cmd	  :	 1;
-		uint64_t	i_rsvd4			  :	30;
+	uint64_t ii_iwel_regval;
+	struct {
+		uint64_t i_intr_timed_out:1;
+		uint64_t i_rsvd:7;
+		uint64_t i_cam_overflow:1;
+		uint64_t i_cam_read_miss:1;
+		uint64_t i_rsvd1:2;
+		uint64_t i_ioq_rep_underflow:1;
+		uint64_t i_ioq_req_underflow:1;
+		uint64_t i_ioq_rep_overflow:1;
+		uint64_t i_ioq_req_overflow:1;
+		uint64_t i_iiq_rep_overflow:1;
+		uint64_t i_iiq_req_overflow:1;
+		uint64_t i_rsvd2:6;
+		uint64_t i_ii_xn_rep_cred_over_under:1;
+		uint64_t i_ii_xn_req_cred_over_under:1;
+		uint64_t i_rsvd3:6;
+		uint64_t i_ii_xn_invalid_cmd:1;
+		uint64_t i_xn_ii_invalid_cmd:1;
+		uint64_t i_rsvd4:30;
 	} ii_iwel_fld_s;
 } ii_iwel_u_t;
 
 /************************************************************************
- *                                                                      *
+ *									*
  *  Controls the II wrapper.						* 
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iwc_u {
-	uint64_t	ii_iwc_regval;
-	struct  {
-		uint64_t	i_dma_byte_swap		  :	 1;
-		uint64_t	i_rsvd			  :	 3;
-		uint64_t	i_cam_read_lines_reset	  :	 1;
-		uint64_t	i_rsvd1			  :	 3;
-		uint64_t	i_ii_xn_cred_over_under_log:	 1;
-		uint64_t	i_rsvd2			  :	19;
-		uint64_t	i_xn_rep_iq_depth	  :	 5;
-		uint64_t	i_rsvd3			  :	 3;
-		uint64_t	i_xn_req_iq_depth	  :	 5;
-		uint64_t	i_rsvd4			  :	 3;
-		uint64_t	i_iiq_depth		  :	 6;
-		uint64_t	i_rsvd5			  :	12;
-		uint64_t	i_force_rep_cred	  :	 1;
-		uint64_t	i_force_req_cred	  :	 1;
+	uint64_t ii_iwc_regval;
+	struct {
+		uint64_t i_dma_byte_swap:1;
+		uint64_t i_rsvd:3;
+		uint64_t i_cam_read_lines_reset:1;
+		uint64_t i_rsvd1:3;
+		uint64_t i_ii_xn_cred_over_under_log:1;
+		uint64_t i_rsvd2:19;
+		uint64_t i_xn_rep_iq_depth:5;
+		uint64_t i_rsvd3:3;
+		uint64_t i_xn_req_iq_depth:5;
+		uint64_t i_rsvd4:3;
+		uint64_t i_iiq_depth:6;
+		uint64_t i_rsvd5:12;
+		uint64_t i_force_rep_cred:1;
+		uint64_t i_force_req_cred:1;
 	} ii_iwc_fld_s;
 } ii_iwc_u_t;
 
 /************************************************************************
- *                                                                      *
+ *									*
  *  Status in the II wrapper.						* 
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iws_u {
-	uint64_t	ii_iws_regval;
-	struct  {
-		uint64_t	i_xn_rep_iq_credits	  :	 5;
-		uint64_t	i_rsvd			  :	 3;
-		uint64_t	i_xn_req_iq_credits	  :	 5;
-		uint64_t	i_rsvd1			  :	51;
+	uint64_t ii_iws_regval;
+	struct {
+		uint64_t i_xn_rep_iq_credits:5;
+		uint64_t i_rsvd:3;
+		uint64_t i_xn_req_iq_credits:5;
+		uint64_t i_rsvd1:51;
 	} ii_iws_fld_s;
 } ii_iws_u_t;
 
 /************************************************************************
- *                                                                      *
+ *									*
  *  Masks errors in the IWEL register.					*
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iweim_u {
-	uint64_t	ii_iweim_regval;
-	struct  {
-		uint64_t	i_intr_timed_out	  :	 1;
-		uint64_t	i_rsvd			  :	 7;
-		uint64_t	i_cam_overflow		  :	 1;
-		uint64_t	i_cam_read_miss		  :	 1;
-		uint64_t	i_rsvd1			  :	 2;
-		uint64_t	i_ioq_rep_underflow	  :	 1;
-		uint64_t	i_ioq_req_underflow	  :	 1;
-		uint64_t	i_ioq_rep_overflow	  :	 1;
-		uint64_t	i_ioq_req_overflow	  :	 1;
-		uint64_t	i_iiq_rep_overflow	  :	 1;
-		uint64_t	i_iiq_req_overflow	  :	 1;
-		uint64_t	i_rsvd2			  :	 6;
-		uint64_t	i_ii_xn_rep_cred_overflow :	 1;
-		uint64_t	i_ii_xn_req_cred_overflow :	 1;
-		uint64_t	i_rsvd3			  :	 6;
-		uint64_t	i_ii_xn_invalid_cmd	  :	 1;
-		uint64_t	i_xn_ii_invalid_cmd	  :	 1;
-		uint64_t	i_rsvd4			  :	30;
+	uint64_t ii_iweim_regval;
+	struct {
+		uint64_t i_intr_timed_out:1;
+		uint64_t i_rsvd:7;
+		uint64_t i_cam_overflow:1;
+		uint64_t i_cam_read_miss:1;
+		uint64_t i_rsvd1:2;
+		uint64_t i_ioq_rep_underflow:1;
+		uint64_t i_ioq_req_underflow:1;
+		uint64_t i_ioq_rep_overflow:1;
+		uint64_t i_ioq_req_overflow:1;
+		uint64_t i_iiq_rep_overflow:1;
+		uint64_t i_iiq_req_overflow:1;
+		uint64_t i_rsvd2:6;
+		uint64_t i_ii_xn_rep_cred_overflow:1;
+		uint64_t i_ii_xn_req_cred_overflow:1;
+		uint64_t i_rsvd3:6;
+		uint64_t i_ii_xn_invalid_cmd:1;
+		uint64_t i_xn_ii_invalid_cmd:1;
+		uint64_t i_rsvd4:30;
 	} ii_iweim_fld_s;
 } ii_iweim_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  A write to this register causes a particular field in the           *
  * corresponding widget's PRB entry to be adjusted up or down by 1.     *
  * This counter should be used when recovering from error and reset     *
  * conditions. Note that software would be capable of causing           *
  * inadvertent overflow or underflow of these counters.                 *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ipca_u {
-	uint64_t	ii_ipca_regval;
-	struct  {
-		uint64_t	i_wid                     :	 4;
-		uint64_t	i_adjust		  :	 1;
-		uint64_t	i_rsvd_1		  :	 3;
-		uint64_t	i_field			  :	 2;
-		uint64_t	i_rsvd			  :	54;
+	uint64_t ii_ipca_regval;
+	struct {
+		uint64_t i_wid:4;
+		uint64_t i_adjust:1;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_field:2;
+		uint64_t i_rsvd:54;
 	} ii_ipca_fld_s;
 } ii_ipca_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
-
 typedef union ii_iprte0a_u {
-	uint64_t	ii_iprte0a_regval;
-	struct  {
-		uint64_t	i_rsvd_1                  :	54;
-		uint64_t	i_widget		  :	 4;
-		uint64_t	i_to_cnt		  :	 5;
-		uint64_t       i_vld                     :      1;
+	uint64_t ii_iprte0a_regval;
+	struct {
+		uint64_t i_rsvd_1:54;
+		uint64_t i_widget:4;
+		uint64_t i_to_cnt:5;
+		uint64_t i_vld:1;
 	} ii_iprte0a_fld_s;
 } ii_iprte0a_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iprte1a_u {
-	uint64_t	ii_iprte1a_regval;
-	struct  {
-		uint64_t	i_rsvd_1                  :	54;
-		uint64_t	i_widget		  :	 4;
-		uint64_t	i_to_cnt		  :	 5;
-		uint64_t       i_vld                     :      1;
+	uint64_t ii_iprte1a_regval;
+	struct {
+		uint64_t i_rsvd_1:54;
+		uint64_t i_widget:4;
+		uint64_t i_to_cnt:5;
+		uint64_t i_vld:1;
 	} ii_iprte1a_fld_s;
 } ii_iprte1a_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iprte2a_u {
-	uint64_t	ii_iprte2a_regval;
-	struct  {
-		uint64_t	i_rsvd_1                  :	54;
-		uint64_t	i_widget		  :	 4;
-		uint64_t	i_to_cnt		  :	 5;
-		uint64_t       i_vld                     :      1;
+	uint64_t ii_iprte2a_regval;
+	struct {
+		uint64_t i_rsvd_1:54;
+		uint64_t i_widget:4;
+		uint64_t i_to_cnt:5;
+		uint64_t i_vld:1;
 	} ii_iprte2a_fld_s;
 } ii_iprte2a_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iprte3a_u {
-	uint64_t	ii_iprte3a_regval;
-	struct  {
-		uint64_t	i_rsvd_1                  :	54;
-		uint64_t	i_widget		  :	 4;
-		uint64_t	i_to_cnt		  :	 5;
-		uint64_t	i_vld			  :	 1;
+	uint64_t ii_iprte3a_regval;
+	struct {
+		uint64_t i_rsvd_1:54;
+		uint64_t i_widget:4;
+		uint64_t i_to_cnt:5;
+		uint64_t i_vld:1;
 	} ii_iprte3a_fld_s;
 } ii_iprte3a_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iprte4a_u {
-	uint64_t	ii_iprte4a_regval;
-	struct	{
-		uint64_t	i_rsvd_1		  :	54;
-		uint64_t	i_widget		  :	 4;
-		uint64_t	i_to_cnt		  :	 5;
-		uint64_t	i_vld			  :	 1;
+	uint64_t ii_iprte4a_regval;
+	struct {
+		uint64_t i_rsvd_1:54;
+		uint64_t i_widget:4;
+		uint64_t i_to_cnt:5;
+		uint64_t i_vld:1;
 	} ii_iprte4a_fld_s;
 } ii_iprte4a_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iprte5a_u {
-	uint64_t	ii_iprte5a_regval;
-	struct	{
-		uint64_t	i_rsvd_1		  :	54;
-		uint64_t	i_widget		  :	 4;
-		uint64_t	i_to_cnt		  :	 5;
-		uint64_t	i_vld			  :	 1;
+	uint64_t ii_iprte5a_regval;
+	struct {
+		uint64_t i_rsvd_1:54;
+		uint64_t i_widget:4;
+		uint64_t i_to_cnt:5;
+		uint64_t i_vld:1;
 	} ii_iprte5a_fld_s;
 } ii_iprte5a_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iprte6a_u {
-	uint64_t	ii_iprte6a_regval;
-	struct	{
-		uint64_t	i_rsvd_1		  :	54;
-		uint64_t	i_widget		  :	 4;
-		uint64_t	i_to_cnt		  :	 5;
-		uint64_t	i_vld			  :	 1;
+	uint64_t ii_iprte6a_regval;
+	struct {
+		uint64_t i_rsvd_1:54;
+		uint64_t i_widget:4;
+		uint64_t i_to_cnt:5;
+		uint64_t i_vld:1;
 	} ii_iprte6a_fld_s;
 } ii_iprte6a_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iprte7a_u {
-        uint64_t       ii_iprte7a_regval;
-        struct  {
-                uint64_t       i_rsvd_1                  :     54;
-                uint64_t       i_widget                  :      4;
-                uint64_t       i_to_cnt                  :      5;
-                uint64_t       i_vld                     :      1;
-        } ii_iprtea7_fld_s;
+	uint64_t ii_iprte7a_regval;
+	struct {
+		uint64_t i_rsvd_1:54;
+		uint64_t i_widget:4;
+		uint64_t i_to_cnt:5;
+		uint64_t i_vld:1;
+	} ii_iprtea7_fld_s;
 } ii_iprte7a_u_t;
 
-
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
-
 typedef union ii_iprte0b_u {
-	uint64_t	ii_iprte0b_regval;
-	struct  {
-		uint64_t	i_rsvd_1                  :	 3;
-		uint64_t	i_address		  :	47;
-		uint64_t	i_init			  :	 3;
-		uint64_t       i_source                  :     11;
+	uint64_t ii_iprte0b_regval;
+	struct {
+		uint64_t i_rsvd_1:3;
+		uint64_t i_address:47;
+		uint64_t i_init:3;
+		uint64_t i_source:11;
 	} ii_iprte0b_fld_s;
 } ii_iprte0b_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iprte1b_u {
-	uint64_t	ii_iprte1b_regval;
-	struct  {
-		uint64_t	i_rsvd_1                  :	 3;
-		uint64_t	i_address		  :	47;
-		uint64_t	i_init			  :	 3;
-		uint64_t       i_source                  :     11;
+	uint64_t ii_iprte1b_regval;
+	struct {
+		uint64_t i_rsvd_1:3;
+		uint64_t i_address:47;
+		uint64_t i_init:3;
+		uint64_t i_source:11;
 	} ii_iprte1b_fld_s;
 } ii_iprte1b_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iprte2b_u {
-	uint64_t	ii_iprte2b_regval;
-	struct  {
-		uint64_t	i_rsvd_1                  :	 3;
-		uint64_t	i_address		  :	47;
-		uint64_t	i_init			  :	 3;
-		uint64_t       i_source                  :     11;
+	uint64_t ii_iprte2b_regval;
+	struct {
+		uint64_t i_rsvd_1:3;
+		uint64_t i_address:47;
+		uint64_t i_init:3;
+		uint64_t i_source:11;
 	} ii_iprte2b_fld_s;
 } ii_iprte2b_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iprte3b_u {
-	uint64_t	ii_iprte3b_regval;
-	struct  {
-		uint64_t	i_rsvd_1                  :	 3;
-		uint64_t	i_address		  :	47;
-		uint64_t	i_init			  :	 3;
-		uint64_t       i_source                  :     11;
+	uint64_t ii_iprte3b_regval;
+	struct {
+		uint64_t i_rsvd_1:3;
+		uint64_t i_address:47;
+		uint64_t i_init:3;
+		uint64_t i_source:11;
 	} ii_iprte3b_fld_s;
 } ii_iprte3b_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iprte4b_u {
-	uint64_t	ii_iprte4b_regval;
-	struct	{
-		uint64_t	i_rsvd_1                  :	 3;
-		uint64_t	i_address		  :	47;
-		uint64_t	i_init			  :	 3;
-		uint64_t       i_source                  :     11;
+	uint64_t ii_iprte4b_regval;
+	struct {
+		uint64_t i_rsvd_1:3;
+		uint64_t i_address:47;
+		uint64_t i_init:3;
+		uint64_t i_source:11;
 	} ii_iprte4b_fld_s;
 } ii_iprte4b_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iprte5b_u {
-	uint64_t	ii_iprte5b_regval;
-	struct	{
-		uint64_t	i_rsvd_1                  :	 3;
-		uint64_t	i_address		  :	47;
-		uint64_t	i_init			  :	 3;
-		uint64_t       i_source                  :     11;
+	uint64_t ii_iprte5b_regval;
+	struct {
+		uint64_t i_rsvd_1:3;
+		uint64_t i_address:47;
+		uint64_t i_init:3;
+		uint64_t i_source:11;
 	} ii_iprte5b_fld_s;
 } ii_iprte5b_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iprte6b_u {
-	uint64_t	ii_iprte6b_regval;
-	struct	{
-		uint64_t	i_rsvd_1                  :	 3;
-		uint64_t	i_address		  :	47;
-		uint64_t	i_init			  :	 3;
-		uint64_t       i_source                  :     11;
+	uint64_t ii_iprte6b_regval;
+	struct {
+		uint64_t i_rsvd_1:3;
+		uint64_t i_address:47;
+		uint64_t i_init:3;
+		uint64_t i_source:11;
 
 	} ii_iprte6b_fld_s;
 } ii_iprte6b_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  There are 8 instances of this register. This register contains      *
  * the information that the II has to remember once it has launched a   *
  * PIO Read operation. The contents are used to form the correct        *
  * Router Network packet and direct the Crosstalk reply to the          *
  * appropriate processor.                                               *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iprte7b_u {
-        uint64_t       ii_iprte7b_regval;
-        struct  {
-		uint64_t	i_rsvd_1                  :	 3;
-		uint64_t	i_address		  :	47;
-		uint64_t	i_init			  :	 3;
-		uint64_t       i_source                  :     11;
-        } ii_iprte7b_fld_s;
+	uint64_t ii_iprte7b_regval;
+	struct {
+		uint64_t i_rsvd_1:3;
+		uint64_t i_address:47;
+		uint64_t i_init:3;
+		uint64_t i_source:11;
+	} ii_iprte7b_fld_s;
 } ii_iprte7b_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  SHub II contains a feature which did not exist in      *
  * the Hub which automatically cleans up after a Read Response          *
  * timeout, including deallocation of the IPRTE and recovery of IBuf    *
···
  * Note that this register does not affect the contents of the IPRTE    *
  * registers. The Valid bits in those registers have to be              *
  * specifically turned off by software.                                 *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ipdr_u {
-	uint64_t	ii_ipdr_regval;
-	struct  {
-		uint64_t	i_te                      :	 3;
-		uint64_t	i_rsvd_1		  :	 1;
-		uint64_t	i_pnd			  :	 1;
-		uint64_t	i_init_rpcnt		  :	 1;
-		uint64_t	i_rsvd			  :	58;
+	uint64_t ii_ipdr_regval;
+	struct {
+		uint64_t i_te:3;
+		uint64_t i_rsvd_1:1;
+		uint64_t i_pnd:1;
+		uint64_t i_init_rpcnt:1;
+		uint64_t i_rsvd:58;
 	} ii_ipdr_fld_s;
 } ii_ipdr_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  A write to this register causes a CRB entry to be returned to the   *
  * queue of free CRBs. The entry should have previously been cleared    *
  * (mark bit) via backdoor access to the pertinent CRB entry. This      *
···
  * software clears the mark bit, and finally 4) software writes to      *
  * the ICDR register to return the CRB entry to the list of free CRB    *
  * entries.                                                             *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_icdr_u {
-	uint64_t	ii_icdr_regval;
-	struct  {
-		uint64_t	i_crb_num                 :	 4;
-		uint64_t	i_pnd			  :	 1;
-		uint64_t       i_rsvd                    :     59;
+	uint64_t ii_icdr_regval;
+	struct {
+		uint64_t i_crb_num:4;
+		uint64_t i_pnd:1;
+		uint64_t i_rsvd:59;
 	} ii_icdr_fld_s;
 } ii_icdr_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register provides debug access to two FIFOs inside of II.      *
  * Both IOQ_MAX* fields of this register contain the instantaneous      *
  * depth (in units of the number of available entries) of the           *
···
  * this register is written. If there are any active entries in any     *
  * of these FIFOs when this register is written, the results are        *
  * undefined.                                                           *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ifdr_u {
-	uint64_t	ii_ifdr_regval;
-	struct  {
-		uint64_t	i_ioq_max_rq              :	 7;
-		uint64_t	i_set_ioq_rq		  :	 1;
-		uint64_t	i_ioq_max_rp		  :	 7;
-		uint64_t	i_set_ioq_rp		  :	 1;
-		uint64_t	i_rsvd			  :	48;
+	uint64_t ii_ifdr_regval;
+	struct {
+		uint64_t i_ioq_max_rq:7;
+		uint64_t i_set_ioq_rq:1;
+		uint64_t i_ioq_max_rp:7;
+		uint64_t i_set_ioq_rp:1;
+		uint64_t i_rsvd:48;
 	} ii_ifdr_fld_s;
 } ii_ifdr_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register allows the II to become sluggish in removing          *
  * messages from its inbound queue (IIQ). This will cause messages to   *
  * back up in either virtual channel. Disabling the "molasses" mode     *
  * subsequently allows the II to be tested under stress. In the         *
  * sluggish ("Molasses") mode, the localized effects of congestion      *
  * can be observed.                                                     *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iiap_u {
-        uint64_t       ii_iiap_regval;
-        struct  {
-                uint64_t       i_rq_mls                  :      6;
-		uint64_t	i_rsvd_1		  :	 2;
-		uint64_t	i_rp_mls		  :	 6;
-		uint64_t       i_rsvd                    :     50;
-        } ii_iiap_fld_s;
+	uint64_t ii_iiap_regval;
+	struct {
+		uint64_t i_rq_mls:6;
+		uint64_t i_rsvd_1:2;
+		uint64_t i_rp_mls:6;
+		uint64_t i_rsvd:50;
+	} ii_iiap_fld_s;
 } ii_iiap_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register allows several parameters of CRB operation to be      *
  * set. Note that writing to this register can have catastrophic side   *
  * effects, if the CRB is not quiescent, i.e. if the CRB is             *
  * processing protocol messages when the write occurs.                  *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_icmr_u {
-	uint64_t	ii_icmr_regval;
-	struct  {
-		uint64_t	i_sp_msg                  :	 1;
-		uint64_t	i_rd_hdr		  :	 1;
-		uint64_t	i_rsvd_4		  :	 2;
-		uint64_t	i_c_cnt			  :	 4;
-		uint64_t	i_rsvd_3		  :	 4;
-		uint64_t	i_clr_rqpd		  :	 1;
-		uint64_t	i_clr_rppd		  :	 1;
-		uint64_t	i_rsvd_2		  :	 2;
-		uint64_t	i_fc_cnt		  :	 4;
-		uint64_t	i_crb_vld		  :	15;
-		uint64_t	i_crb_mark		  :	15;
-		uint64_t	i_rsvd_1		  :	 2;
-		uint64_t	i_precise		  :	 1;
-		uint64_t	i_rsvd			  :	11;
+	uint64_t ii_icmr_regval;
+	struct {
+		uint64_t i_sp_msg:1;
+		uint64_t i_rd_hdr:1;
+		uint64_t i_rsvd_4:2;
+		uint64_t i_c_cnt:4;
+		uint64_t i_rsvd_3:4;
+		uint64_t i_clr_rqpd:1;
+		uint64_t i_clr_rppd:1;
+		uint64_t i_rsvd_2:2;
+		uint64_t i_fc_cnt:4;
+		uint64_t i_crb_vld:15;
+		uint64_t i_crb_mark:15;
+		uint64_t i_rsvd_1:2;
+		uint64_t i_precise:1;
+		uint64_t i_rsvd:11;
 	} ii_icmr_fld_s;
 } ii_icmr_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register allows control of the table portion of the CRB        *
  * logic via software. Control operations from this register have       *
  * priority over all incoming Crosstalk or BTE requests.                *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_iccr_u {
-	uint64_t	ii_iccr_regval;
-	struct  {
-		uint64_t	i_crb_num                 :	 4;
-		uint64_t	i_rsvd_1		  :	 4;
-		uint64_t	i_cmd			  :	 8;
-		uint64_t	i_pending		  :	 1;
-		uint64_t	i_rsvd			  :	47;
+	uint64_t ii_iccr_regval;
+	struct {
+		uint64_t i_crb_num:4;
+		uint64_t i_rsvd_1:4;
+		uint64_t i_cmd:8;
+		uint64_t i_pending:1;
+		uint64_t i_rsvd:47;
 	} ii_iccr_fld_s;
 } ii_iccr_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register allows the maximum timeout value to be programmed.    *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_icto_u {
-	uint64_t	ii_icto_regval;
-	struct  {
-		uint64_t	i_timeout                 :	 8;
-		uint64_t	i_rsvd			  :	56;
+	uint64_t ii_icto_regval;
+	struct {
+		uint64_t i_timeout:8;
+		uint64_t i_rsvd:56;
 	} ii_icto_fld_s;
 } ii_icto_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register allows the timeout prescalar to be programmed. An     *
  * internal counter is associated with this register. When the          *
  * internal counter reaches the value of the PRESCALE field, the        *
  * timer registers in all valid CRBs are incremented (CRBx_D[TIMEOUT]   *
  * field). The internal counter resets to zero, and then continues      *
  * counting.                                                            *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ictp_u {
-	uint64_t	ii_ictp_regval;
-	struct  {
-		uint64_t	i_prescale                :	24;
-		uint64_t	i_rsvd			  :	40;
+	uint64_t ii_ictp_regval;
+	struct {
+		uint64_t i_prescale:24;
+		uint64_t i_rsvd:40;
 	} ii_ictp_fld_s;
 } ii_ictp_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are 15 CRB Entries (ICRB0 to ICRBE) that are     *
  * used for Crosstalk operations (both cacheline and partial            *
  * operations) or BTE/IO. Because the CRB entries are very wide, five   *
···
  * recovering any potential error state from before the reset).         *
  * The following four tables summarize the format for the four          *
  * registers that are used for each ICRB# Entry.                        *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_icrb0_a_u {
-	uint64_t	ii_icrb0_a_regval;
-	struct  {
-		uint64_t	ia_iow                    :	 1;
-		uint64_t	ia_vld			  :	 1;
-		uint64_t	ia_addr			  :	47;
-		uint64_t	ia_tnum			  :	 5;
-		uint64_t	ia_sidn			  :	 4;
-		uint64_t       ia_rsvd                   :      6;
+	uint64_t ii_icrb0_a_regval;
+	struct {
+		uint64_t ia_iow:1;
+		uint64_t ia_vld:1;
+		uint64_t ia_addr:47;
+		uint64_t ia_tnum:5;
+		uint64_t ia_sidn:4;
+		uint64_t ia_rsvd:6;
 	} ii_icrb0_a_fld_s;
 } ii_icrb0_a_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are 15 CRB Entries (ICRB0 to ICRBE) that are     *
  * used for Crosstalk operations (both cacheline and partial            *
  * operations) or BTE/IO. Because the CRB entries are very wide, five   *
  * registers (_A to _E) are required to read and write each entry.      *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_icrb0_b_u {
-	uint64_t	ii_icrb0_b_regval;
-	struct	{
-		uint64_t	ib_xt_err		  :	 1;
-		uint64_t	ib_mark			  :	 1;
-		uint64_t	ib_ln_uce		  :	 1;
-		uint64_t	ib_errcode		  :	 3;
-		uint64_t	ib_error		  :	 1;
-		uint64_t	ib_stall__bte_1		  :	 1;
-		uint64_t	ib_stall__bte_0		  :	 1;
-		uint64_t	ib_stall__intr		  :	 1;
-		uint64_t	ib_stall_ib		  :	 1;
-		uint64_t	ib_intvn		  :	 1;
-		uint64_t	ib_wb			  :	 1;
-		uint64_t	ib_hold			  :	 1;
-		uint64_t	ib_ack			  :	 1;
-		uint64_t	ib_resp			  :	 1;
-		uint64_t	ib_ack_cnt		  :	11;
-		uint64_t	ib_rsvd			  :	 7;
-		uint64_t	ib_exc			  :	 5;
-		uint64_t	ib_init			  :	 3;
-		uint64_t	ib_imsg			  :	 8;
-		uint64_t	ib_imsgtype		  :	 2;
-		uint64_t	ib_use_old		  :	 1;
-		uint64_t	ib_rsvd_1		  :	11;
+	uint64_t ii_icrb0_b_regval;
+	struct {
+		uint64_t ib_xt_err:1;
+		uint64_t ib_mark:1;
+		uint64_t ib_ln_uce:1;
+		uint64_t ib_errcode:3;
+		uint64_t ib_error:1;
+		uint64_t ib_stall__bte_1:1;
+		uint64_t ib_stall__bte_0:1;
+		uint64_t ib_stall__intr:1;
+		uint64_t ib_stall_ib:1;
+		uint64_t ib_intvn:1;
+		uint64_t ib_wb:1;
+		uint64_t ib_hold:1;
+		uint64_t ib_ack:1;
+		uint64_t ib_resp:1;
+		uint64_t ib_ack_cnt:11;
+		uint64_t ib_rsvd:7;
+		uint64_t ib_exc:5;
+		uint64_t ib_init:3;
+		uint64_t ib_imsg:8;
+		uint64_t ib_imsgtype:2;
+		uint64_t ib_use_old:1;
+		uint64_t ib_rsvd_1:11;
 	} ii_icrb0_b_fld_s;
 } ii_icrb0_b_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are 15 CRB Entries (ICRB0 to ICRBE) that are     *
  * used for Crosstalk operations (both cacheline and partial            *
  * operations) or BTE/IO. Because the CRB entries are very wide, five   *
  * registers (_A to _E) are required to read and write each entry.      *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_icrb0_c_u {
-	uint64_t	ii_icrb0_c_regval;
-	struct	{
-		uint64_t	ic_source		  :	15;
-		uint64_t	ic_size			  :	 2;
-		uint64_t	ic_ct			  :	 1;
-		uint64_t	ic_bte_num		  :	 1;
-		uint64_t	ic_gbr			  :	 1;
-		uint64_t	ic_resprqd		  :	 1;
-		uint64_t	ic_bo			  :	 1;
-		uint64_t	ic_suppl		  :	15;
-		uint64_t	ic_rsvd			  :	27;
+	uint64_t ii_icrb0_c_regval;
+	struct {
+		uint64_t ic_source:15;
+		uint64_t ic_size:2;
+		uint64_t ic_ct:1;
+		uint64_t ic_bte_num:1;
+		uint64_t ic_gbr:1;
+		uint64_t ic_resprqd:1;
+		uint64_t ic_bo:1;
+		uint64_t ic_suppl:15;
+		uint64_t ic_rsvd:27;
 	} ii_icrb0_c_fld_s;
 } ii_icrb0_c_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are 15 CRB Entries (ICRB0 to ICRBE) that are     *
  * used for Crosstalk operations (both cacheline and partial            *
  * operations) or BTE/IO. Because the CRB entries are very wide, five   *
  * registers (_A to _E) are required to read and write each entry.      *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_icrb0_d_u {
-	uint64_t	ii_icrb0_d_regval;
-	struct  {
-		uint64_t	id_pa_be                  :	43;
-		uint64_t	id_bte_op		  :	 1;
-		uint64_t	id_pr_psc		  :	 4;
-		uint64_t	id_pr_cnt		  :	 4;
-		uint64_t	id_sleep		  :	 1;
-		uint64_t	id_rsvd			  :	11;
+	uint64_t ii_icrb0_d_regval;
+	struct {
+		uint64_t id_pa_be:43;
+		uint64_t id_bte_op:1;
+		uint64_t id_pr_psc:4;
+		uint64_t id_pr_cnt:4;
+		uint64_t id_sleep:1;
+		uint64_t id_rsvd:11;
 	} ii_icrb0_d_fld_s;
 } ii_icrb0_d_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  There are 15 CRB Entries (ICRB0 to ICRBE) that are     *
  * used for Crosstalk operations (both cacheline and partial            *
  * operations) or BTE/IO. Because the CRB entries are very wide, five   *
  * registers (_A to _E) are required to read and write each entry.      *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_icrb0_e_u {
-	uint64_t	ii_icrb0_e_regval;
-	struct  {
-		uint64_t	ie_timeout                :	 8;
-		uint64_t	ie_context		  :	15;
-		uint64_t	ie_rsvd			  :	 1;
-		uint64_t	ie_tvld			  :	 1;
-		uint64_t	ie_cvld			  :	 1;
-		uint64_t	ie_rsvd_0		  :	38;
+	uint64_t ii_icrb0_e_regval;
+	struct {
+		uint64_t ie_timeout:8;
+		uint64_t ie_context:15;
+		uint64_t ie_rsvd:1;
+		uint64_t ie_tvld:1;
+		uint64_t ie_cvld:1;
+		uint64_t ie_rsvd_0:38;
 	} ii_icrb0_e_fld_s;
 } ii_icrb0_e_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register contains the lower 64 bits of the header of the       *
  * spurious message captured by II. Valid when the SP_MSG bit in ICMR   *
  * register is set.                                                     *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_icsml_u {
-	uint64_t	ii_icsml_regval;
-	struct  {
-		uint64_t	i_tt_addr                 :	47;
-		uint64_t	i_newsuppl_ex		  :	14;
-		uint64_t	i_reserved		  :	 2;
-		uint64_t       i_overflow                :      1;
+	uint64_t ii_icsml_regval;
+	struct {
+		uint64_t i_tt_addr:47;
+		uint64_t i_newsuppl_ex:14;
+		uint64_t i_reserved:2;
+		uint64_t i_overflow:1;
 	} ii_icsml_fld_s;
 } ii_icsml_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register contains the middle 64 bits of the header of the      *
  * spurious message captured by II. Valid when the SP_MSG bit in ICMR   *
  * register is set.                                                     *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_icsmm_u {
-	uint64_t	ii_icsmm_regval;
-	struct  {
-		uint64_t	i_tt_ack_cnt              :	11;
-		uint64_t	i_reserved		  :	53;
+	uint64_t ii_icsmm_regval;
+	struct {
+		uint64_t i_tt_ack_cnt:11;
+		uint64_t i_reserved:53;
 	} ii_icsmm_fld_s;
 } ii_icsmm_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register contains the microscopic state, all the inputs to     *
  * the protocol table, captured with the spurious message. Valid when   *
  * the SP_MSG bit in the ICMR register is set.                          *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_icsmh_u {
-	uint64_t	ii_icsmh_regval;
-	struct  {
-		uint64_t	i_tt_vld                  :	 1;
-		uint64_t	i_xerr			  :	 1;
-		uint64_t	i_ft_cwact_o		  :	 1;
-		uint64_t	i_ft_wact_o		  :	 1;
-		uint64_t       i_ft_active_o             :      1;
-		uint64_t	i_sync			  :	 1;
-		uint64_t	i_mnusg			  :	 1;
-		uint64_t	i_mnusz			  :	 1;
-		uint64_t	i_plusz			  :	 1;
-		uint64_t	i_plusg			  :	 1;
-		uint64_t	i_tt_exc		  :	 5;
-		uint64_t	i_tt_wb			  :	 1;
-		uint64_t	i_tt_hold		  :	 1;
-		uint64_t	i_tt_ack		  :	 1;
-		uint64_t	i_tt_resp		  :	 1;
-		uint64_t	i_tt_intvn		  :	 1;
-		uint64_t	i_g_stall_bte1		  :	 1;
-		uint64_t	i_g_stall_bte0		  :	 1;
-		uint64_t	i_g_stall_il		  :	 1;
-		uint64_t	i_g_stall_ib		  :	 1;
-		uint64_t	i_tt_imsg		  :	 8;
-		uint64_t	i_tt_imsgtype		  :	 2;
-		uint64_t	i_tt_use_old		  :	 1;
-		uint64_t	i_tt_respreqd		  :	 1;
-		uint64_t	i_tt_bte_num		  :	 1;
-		uint64_t	i_cbn			  :	 1;
-		uint64_t	i_match			  :	 1;
-		uint64_t	i_rpcnt_lt_34		  :	 1;
-		uint64_t	i_rpcnt_ge_34		  :	 1;
-		uint64_t	i_rpcnt_lt_18		  :	 1;
-		uint64_t	i_rpcnt_ge_18		  :	 1;
-		uint64_t       i_rpcnt_lt_2              :      1;
-		uint64_t	i_rpcnt_ge_2		  :	 1;
-		uint64_t	i_rqcnt_lt_18		  :	 1;
-		uint64_t	i_rqcnt_ge_18		  :	 1;
-		uint64_t	i_rqcnt_lt_2		  :	 1;
-		uint64_t	i_rqcnt_ge_2		  :	 1;
-		uint64_t	i_tt_device		  :	 7;
-		uint64_t	i_tt_init		  :	 3;
-		uint64_t	i_reserved		  :	 5;
+	uint64_t ii_icsmh_regval;
+	struct {
+		uint64_t i_tt_vld:1;
+		uint64_t i_xerr:1;
+		uint64_t i_ft_cwact_o:1;
+		uint64_t i_ft_wact_o:1;
+		uint64_t i_ft_active_o:1;
+		uint64_t i_sync:1;
+		uint64_t i_mnusg:1;
+		uint64_t i_mnusz:1;
+		uint64_t i_plusz:1;
+		uint64_t i_plusg:1;
+		uint64_t i_tt_exc:5;
+		uint64_t i_tt_wb:1;
+		uint64_t i_tt_hold:1;
+		uint64_t i_tt_ack:1;
+		uint64_t i_tt_resp:1;
+		uint64_t i_tt_intvn:1;
+		uint64_t i_g_stall_bte1:1;
+		uint64_t i_g_stall_bte0:1;
+		uint64_t i_g_stall_il:1;
+		uint64_t i_g_stall_ib:1;
+		uint64_t i_tt_imsg:8;
+		uint64_t i_tt_imsgtype:2;
+		uint64_t i_tt_use_old:1;
+		uint64_t i_tt_respreqd:1;
+		uint64_t i_tt_bte_num:1;
+		uint64_t i_cbn:1;
+		uint64_t i_match:1;
+		uint64_t i_rpcnt_lt_34:1;
+		uint64_t i_rpcnt_ge_34:1;
+		uint64_t i_rpcnt_lt_18:1;
+		uint64_t i_rpcnt_ge_18:1;
+		uint64_t i_rpcnt_lt_2:1;
+		uint64_t i_rpcnt_ge_2:1;
+		uint64_t i_rqcnt_lt_18:1;
+		uint64_t i_rqcnt_ge_18:1;
+		uint64_t i_rqcnt_lt_2:1;
+		uint64_t i_rqcnt_ge_2:1;
+		uint64_t i_tt_device:7;
+		uint64_t i_tt_init:3;
+		uint64_t i_reserved:5;
 	} ii_icsmh_fld_s;
 } ii_icsmh_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  The Shub DEBUG unit provides a 3-bit selection signal to the        *
  * II core and a 3-bit selection signal to the fsbclk domain in the II  *
  * wrapper.                                                             *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_idbss_u {
-	uint64_t	ii_idbss_regval;
-	struct  {
-		uint64_t	i_iioclk_core_submenu     :	 3;
-		uint64_t	i_rsvd			  :	 5;
-		uint64_t	i_fsbclk_wrapper_submenu  :	 3;
-		uint64_t	i_rsvd_1		  :	 5;
-		uint64_t	i_iioclk_menu		  :	 5;
-		uint64_t	i_rsvd_2		  :	43;
+	uint64_t ii_idbss_regval;
+	struct {
+		uint64_t i_iioclk_core_submenu:3;
+		uint64_t i_rsvd:5;
+		uint64_t i_fsbclk_wrapper_submenu:3;
+		uint64_t i_rsvd_1:5;
+		uint64_t i_iioclk_menu:5;
+		uint64_t i_rsvd_2:43;
 	} ii_idbss_fld_s;
 } ii_idbss_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  This register is used to set up the length for a       *
  * transfer and then to monitor the progress of that transfer. This     *
  * register needs to be initialized before a transfer is started. A     *
···
  * transfer completes, hardware will clear the Busy bit. The length     *
  * field will also contain the number of cache lines left to be         *
  * transferred.                                                         *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ibls0_u {
-	uint64_t	ii_ibls0_regval;
-	struct	{
-		uint64_t	i_length		  :	16;
-		uint64_t	i_error			  :	 1;
-		uint64_t	i_rsvd_1		  :	 3;
-		uint64_t	i_busy			  :	 1;
-		uint64_t       i_rsvd                    :     43;
+	uint64_t ii_ibls0_regval;
+	struct {
+		uint64_t i_length:16;
+		uint64_t i_error:1;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_busy:1;
+		uint64_t i_rsvd:43;
 	} ii_ibls0_fld_s;
 } ii_ibls0_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register should be loaded before a transfer is started. The    *
  * address to be loaded in bits 39:0 is the 40-bit TRex+ physical       *
  * address as described in Section 1.3, Figure2 and Figure3. Since      *
  * the bottom 7 bits of the address are always taken to be zero, BTE    *
  * transfers are always cacheline-aligned.                              *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ibsa0_u {
-	uint64_t	ii_ibsa0_regval;
-	struct  {
-		uint64_t	i_rsvd_1                  :	 7;
-		uint64_t	i_addr			  :	42;
-		uint64_t       i_rsvd                    :     15;
+	uint64_t ii_ibsa0_regval;
+	struct {
+		uint64_t i_rsvd_1:7;
+		uint64_t i_addr:42;
+		uint64_t i_rsvd:15;
 	} ii_ibsa0_fld_s;
 } ii_ibsa0_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register should be loaded before a transfer is started. The    *
  * address to be loaded in bits 39:0 is the 40-bit TRex+ physical       *
  * address as described in Section 1.3, Figure2 and Figure3. Since      *
  * the bottom 7 bits of the address are always taken to be zero, BTE    *
  * transfers are always cacheline-aligned.                              *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ibda0_u {
-	uint64_t	ii_ibda0_regval;
-	struct  {
-		uint64_t	i_rsvd_1                  :	 7;
-		uint64_t	i_addr			  :	42;
-		uint64_t	i_rsvd			  :	15;
+	uint64_t ii_ibda0_regval;
+	struct {
+		uint64_t i_rsvd_1:7;
+		uint64_t i_addr:42;
+		uint64_t i_rsvd:15;
 	} ii_ibda0_fld_s;
 } ii_ibda0_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  Writing to this register sets up the attributes of the transfer     *
  * and initiates the transfer operation. Reading this register has      *
  * the side effect of terminating any transfer in progress. Note:       *
···
  * other BTE. If a BTE stream has to be stopped (due to error           *
  * handling for example), both BTE streams should be stopped and        *
  * their transfers discarded.                                           *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ibct0_u {
-	uint64_t	ii_ibct0_regval;
-	struct  {
-		uint64_t	i_zerofill                :	 1;
-		uint64_t	i_rsvd_2		  :	 3;
-		uint64_t	i_notify		  :	 1;
-		uint64_t	i_rsvd_1		  :	 3;
-		uint64_t       i_poison                  :      1;
-		uint64_t       i_rsvd                    :     55;
+	uint64_t ii_ibct0_regval;
+	struct {
+		uint64_t i_zerofill:1;
+		uint64_t i_rsvd_2:3;
+		uint64_t i_notify:1;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_poison:1;
+		uint64_t i_rsvd:55;
 	} ii_ibct0_fld_s;
 } ii_ibct0_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register contains the address to which the WINV is sent.       *
  * This address has to be cache line aligned.                           *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ibna0_u {
-	uint64_t	ii_ibna0_regval;
-	struct  {
-		uint64_t	i_rsvd_1                  :	 7;
-		uint64_t	i_addr			  :	42;
-		uint64_t	i_rsvd			  :	15;
+	uint64_t ii_ibna0_regval;
+	struct {
+		uint64_t i_rsvd_1:7;
+		uint64_t i_addr:42;
+		uint64_t i_rsvd:15;
 	} ii_ibna0_fld_s;
 } ii_ibna0_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register contains the programmable level as well as the node   *
  * ID and PI unit of the processor to which the interrupt will be       *
- * sent.                                                                *
- *                                                                      *
+ * sent.								*
+ *									*
  ************************************************************************/
 
 typedef union ii_ibia0_u {
-	uint64_t	ii_ibia0_regval;
-	struct  {
-		uint64_t	i_rsvd_2                   :	 1;
-		uint64_t	i_node_id		  :	11;
-		uint64_t	i_rsvd_1		  :	 4;
-		uint64_t	i_level			  :	 7;
-		uint64_t       i_rsvd                    :     41;
+	uint64_t ii_ibia0_regval;
+	struct {
+		uint64_t i_rsvd_2:1;
+		uint64_t i_node_id:11;
+		uint64_t i_rsvd_1:4;
+		uint64_t i_level:7;
+		uint64_t i_rsvd:41;
 	} ii_ibia0_fld_s;
 } ii_ibia0_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  * Description:  This register is used to set up the length for a       *
  * transfer and then to monitor the progress of that transfer. This     *
  * register needs to be initialized before a transfer is started. A     *
···
  * transfer completes, hardware will clear the Busy bit. The length     *
  * field will also contain the number of cache lines left to be         *
  * transferred.                                                         *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ibls1_u {
-	uint64_t	ii_ibls1_regval;
-	struct  {
-		uint64_t	i_length                  :	16;
-		uint64_t	i_error			  :	 1;
-		uint64_t	i_rsvd_1		  :	 3;
-		uint64_t	i_busy			  :	 1;
-		uint64_t       i_rsvd                    :     43;
+	uint64_t ii_ibls1_regval;
+	struct {
+		uint64_t i_length:16;
+		uint64_t i_error:1;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_busy:1;
+		uint64_t i_rsvd:43;
 	} ii_ibls1_fld_s;
 } ii_ibls1_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register should be loaded before a transfer is started. The    *
  * address to be loaded in bits 39:0 is the 40-bit TRex+ physical       *
  * address as described in Section 1.3, Figure2 and Figure3. Since      *
  * the bottom 7 bits of the address are always taken to be zero, BTE    *
  * transfers are always cacheline-aligned.                              *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ibsa1_u {
-	uint64_t	ii_ibsa1_regval;
-	struct  {
-		uint64_t	i_rsvd_1                  :	 7;
-		uint64_t	i_addr			  :	33;
-		uint64_t	i_rsvd			  :	24;
+	uint64_t ii_ibsa1_regval;
+	struct {
+		uint64_t i_rsvd_1:7;
+		uint64_t i_addr:33;
+		uint64_t i_rsvd:24;
 	} ii_ibsa1_fld_s;
 } ii_ibsa1_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register should be loaded before a transfer is started. The    *
  * address to be loaded in bits 39:0 is the 40-bit TRex+ physical       *
  * address as described in Section 1.3, Figure2 and Figure3. Since      *
  * the bottom 7 bits of the address are always taken to be zero, BTE    *
  * transfers are always cacheline-aligned.                              *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ibda1_u {
-	uint64_t	ii_ibda1_regval;
-	struct  {
-		uint64_t	i_rsvd_1                  :	 7;
-		uint64_t	i_addr			  :	33;
-		uint64_t	i_rsvd			  :	24;
+	uint64_t ii_ibda1_regval;
+	struct {
+		uint64_t i_rsvd_1:7;
+		uint64_t i_addr:33;
+		uint64_t i_rsvd:24;
 	} ii_ibda1_fld_s;
 } ii_ibda1_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  Writing to this register sets up the attributes of the transfer     *
  * and initiates the transfer operation. Reading this register has      *
  * the side effect of terminating any transfer in progress. Note:       *
···
  * other BTE. If a BTE stream has to be stopped (due to error           *
  * handling for example), both BTE streams should be stopped and        *
  * their transfers discarded.                                           *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ibct1_u {
-	uint64_t	ii_ibct1_regval;
-	struct  {
-		uint64_t	i_zerofill                :	 1;
-		uint64_t	i_rsvd_2		  :	 3;
-		uint64_t	i_notify		  :	 1;
-		uint64_t	i_rsvd_1		  :	 3;
-		uint64_t	i_poison		  :	 1;
-		uint64_t	i_rsvd			  :	55;
+	uint64_t ii_ibct1_regval;
+	struct {
+		uint64_t i_zerofill:1;
+		uint64_t i_rsvd_2:3;
+		uint64_t i_notify:1;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_poison:1;
+		uint64_t i_rsvd:55;
 	} ii_ibct1_fld_s;
 } ii_ibct1_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register contains the address to which the WINV is sent.       *
  * This address has to be cache line aligned.                           *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ibna1_u {
-	uint64_t	ii_ibna1_regval;
-	struct  {
-		uint64_t	i_rsvd_1                  :	 7;
-		uint64_t	i_addr			  :	33;
-		uint64_t       i_rsvd                    :     24;
+	uint64_t ii_ibna1_regval;
+	struct {
+		uint64_t i_rsvd_1:7;
+		uint64_t i_addr:33;
+		uint64_t i_rsvd:24;
 	} ii_ibna1_fld_s;
 } ii_ibna1_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register contains the programmable level as well as the node   *
  * ID and PI unit of the processor to which the interrupt will be       *
- * sent.                                                                *
- *                                                                      *
+ * sent.								*
+ *									*
  ************************************************************************/
 
 typedef union ii_ibia1_u {
-	uint64_t	ii_ibia1_regval;
-	struct  {
-		uint64_t	i_pi_id                   :	 1;
-		uint64_t	i_node_id		  :	 8;
-		uint64_t	i_rsvd_1		  :	 7;
-		uint64_t	i_level			  :	 7;
-		uint64_t	i_rsvd			  :	41;
+	uint64_t ii_ibia1_regval;
+	struct {
+		uint64_t i_pi_id:1;
+		uint64_t i_node_id:8;
+		uint64_t i_rsvd_1:7;
+		uint64_t i_level:7;
+		uint64_t i_rsvd:41;
 	} ii_ibia1_fld_s;
 } ii_ibia1_u_t;
 
-
 /************************************************************************
- *                                                                      *
+ *									*
  *  This register defines the resources that feed information into      *
  * the two performance counters located in the IO Performance           *
  * Profiling Register. There are 17 different quantities that can be    *
···
  * other is available from the other performance counter. Hence, the    *
  * II supports all 17*16=272 possible combinations of quantities to     *
  * measure.                                                             *
- *                                                                      *
+ *									*
  ************************************************************************/
 
 typedef union ii_ipcr_u {
-	uint64_t	ii_ipcr_regval;
-	struct  {
-		uint64_t	i_ippr0_c                 :	 4;
-		uint64_t	i_ippr1_c		  :	 4;
-		uint64_t	i_icct			  :	 8;
-		uint64_t       i_rsvd                    :     48;
+	uint64_t ii_ipcr_regval;
+	struct {
+		uint64_t i_ippr0_c:4;
+		uint64_t i_ippr1_c:4;
+		uint64_t i_icct:8;
+		uint64_t i_rsvd:48;
 	} ii_ipcr_fld_s;
 } ii_ipcr_u_t;
 
-
 /************************************************************************
- *                                                                      *
- *                                                                      *
- *                                                                      *
+ *									*
+ *									*
+ *									*
  ************************************************************************/
 
 typedef union ii_ippr_u {
-	uint64_t	ii_ippr_regval;
-	struct  {
-		uint64_t	i_ippr0                   :	32;
-		uint64_t	i_ippr1			  :	32;
+	uint64_t ii_ippr_regval;
+	struct {
+		uint64_t i_ippr0:32;
+		uint64_t i_ippr1:32;
 	} ii_ippr_fld_s;
 } ii_ippr_u_t;
 
-
-
-/**************************************************************************
- *                                                                        *
- * The following defines which were not formed into structures are        *
- * probably indentical to another register, and the name of the           *
- * register is provided against each of these registers. This             *
- * information needs to be checked carefully                              *
- *                                                                        *
- *           IIO_ICRB1_A                IIO_ICRB0_A                       *
- *           IIO_ICRB1_B                IIO_ICRB0_B                       *
- *           IIO_ICRB1_C                IIO_ICRB0_C                       *
- *           IIO_ICRB1_D                IIO_ICRB0_D                       *
- *           IIO_ICRB1_E                IIO_ICRB0_E                       *
- *           IIO_ICRB2_A                IIO_ICRB0_A                       *
- *           IIO_ICRB2_B                IIO_ICRB0_B                       *
- *           IIO_ICRB2_C                IIO_ICRB0_C                       *
- *           IIO_ICRB2_D                IIO_ICRB0_D                       *
- *           IIO_ICRB2_E                IIO_ICRB0_E                       *
- *           IIO_ICRB3_A                IIO_ICRB0_A                       *
- *           IIO_ICRB3_B                IIO_ICRB0_B                       *
- *           IIO_ICRB3_C                IIO_ICRB0_C                       *
- *           IIO_ICRB3_D                IIO_ICRB0_D                       *
- *           IIO_ICRB3_E                IIO_ICRB0_E                       *
- *           IIO_ICRB4_A                IIO_ICRB0_A                       *
- *           IIO_ICRB4_B                IIO_ICRB0_B                       *
- *           IIO_ICRB4_C                IIO_ICRB0_C                       *
- *           IIO_ICRB4_D                IIO_ICRB0_D                       *
- *           IIO_ICRB4_E                IIO_ICRB0_E                       *
- *           IIO_ICRB5_A                IIO_ICRB0_A                       *
- *           IIO_ICRB5_B                IIO_ICRB0_B                       *
- *           IIO_ICRB5_C                IIO_ICRB0_C                       *
- *           IIO_ICRB5_D                IIO_ICRB0_D                       *
- *           IIO_ICRB5_E                IIO_ICRB0_E                       *
- *           IIO_ICRB6_A                IIO_ICRB0_A                       *
- *           IIO_ICRB6_B                IIO_ICRB0_B                       *
- *           IIO_ICRB6_C                IIO_ICRB0_C                       *
- *           IIO_ICRB6_D                IIO_ICRB0_D                       *
- *           IIO_ICRB6_E                IIO_ICRB0_E                       *
- *           IIO_ICRB7_A                IIO_ICRB0_A                       *
- *           IIO_ICRB7_B                IIO_ICRB0_B                       *
- *           IIO_ICRB7_C                IIO_ICRB0_C                       *
- *           IIO_ICRB7_D                IIO_ICRB0_D                       *
- *           IIO_ICRB7_E                IIO_ICRB0_E                       *
- *           IIO_ICRB8_A                IIO_ICRB0_A                       *
- *           IIO_ICRB8_B                IIO_ICRB0_B                       *
- *           IIO_ICRB8_C                IIO_ICRB0_C                       *
- *           IIO_ICRB8_D                IIO_ICRB0_D                       *
- *           IIO_ICRB8_E                IIO_ICRB0_E                       *
- *           IIO_ICRB9_A                IIO_ICRB0_A                       *
- *           IIO_ICRB9_B                IIO_ICRB0_B                       *
- *           IIO_ICRB9_C                IIO_ICRB0_C                       *
- *           IIO_ICRB9_D                IIO_ICRB0_D                       *
- *           IIO_ICRB9_E                IIO_ICRB0_E                       *
- *           IIO_ICRBA_A                IIO_ICRB0_A                       *
- *           IIO_ICRBA_B                IIO_ICRB0_B                       *
- *           IIO_ICRBA_C                IIO_ICRB0_C                       *
- *           IIO_ICRBA_D                IIO_ICRB0_D                       *
- *           IIO_ICRBA_E                IIO_ICRB0_E                       *
- *           IIO_ICRBB_A                IIO_ICRB0_A                       *
- *           IIO_ICRBB_B                IIO_ICRB0_B                       *
- *           IIO_ICRBB_C                IIO_ICRB0_C                       *
- *           IIO_ICRBB_D                IIO_ICRB0_D                       *
- *           IIO_ICRBB_E                IIO_ICRB0_E                       *
- *           IIO_ICRBC_A                IIO_ICRB0_A                       *
- *           IIO_ICRBC_B                IIO_ICRB0_B                       *
- *           IIO_ICRBC_C                IIO_ICRB0_C                       *
- *           IIO_ICRBC_D                IIO_ICRB0_D                       *
- *           IIO_ICRBC_E                IIO_ICRB0_E                       *
- *           IIO_ICRBD_A                IIO_ICRB0_A                       *
- *           IIO_ICRBD_B                IIO_ICRB0_B                       *
- *           IIO_ICRBD_C                IIO_ICRB0_C                       *
- *           IIO_ICRBD_D                IIO_ICRB0_D                       *
- *           IIO_ICRBD_E                IIO_ICRB0_E                       *
- *           IIO_ICRBE_A                IIO_ICRB0_A                       *
- *           IIO_ICRBE_B                IIO_ICRB0_B                       *
- *           IIO_ICRBE_C                IIO_ICRB0_C                       *
- *           IIO_ICRBE_D                IIO_ICRB0_D                       *
- *           IIO_ICRBE_E                IIO_ICRB0_E                       *
- *                                                                        *
- **************************************************************************/
-
+/************************************************************************
+ *									*
+ * The following defines which were not formed into structures are	*
+ * probably indentical to another register, and the name of the		*
+ * register is provided against each of these registers. This		*
+ * information needs to be checked carefully				*
+ *									*
+ *		IIO_ICRB1_A		IIO_ICRB0_A			*
+ *		IIO_ICRB1_B		IIO_ICRB0_B			*
+ *		IIO_ICRB1_C		IIO_ICRB0_C			*
+ *		IIO_ICRB1_D		IIO_ICRB0_D			*
+ *		IIO_ICRB1_E		IIO_ICRB0_E			*
+ *		IIO_ICRB2_A		IIO_ICRB0_A			*
+ *		IIO_ICRB2_B		IIO_ICRB0_B			*
+ *		IIO_ICRB2_C		IIO_ICRB0_C			*
+ *		IIO_ICRB2_D		IIO_ICRB0_D			*
+ *		IIO_ICRB2_E		IIO_ICRB0_E			*
+ *		IIO_ICRB3_A		IIO_ICRB0_A			*
+ *		IIO_ICRB3_B		IIO_ICRB0_B			*
+ *		IIO_ICRB3_C		IIO_ICRB0_C			*
+ *		IIO_ICRB3_D		IIO_ICRB0_D			*
+ *		IIO_ICRB3_E		IIO_ICRB0_E			*
+ *		IIO_ICRB4_A		IIO_ICRB0_A			*
+ *		IIO_ICRB4_B		IIO_ICRB0_B			*
+ *		IIO_ICRB4_C		IIO_ICRB0_C			*
+ *		IIO_ICRB4_D		IIO_ICRB0_D			*
+ *		IIO_ICRB4_E		IIO_ICRB0_E			*
+ *		IIO_ICRB5_A		IIO_ICRB0_A			*
+ *		IIO_ICRB5_B		IIO_ICRB0_B			*
+ *		IIO_ICRB5_C		IIO_ICRB0_C			*
+ *		IIO_ICRB5_D		IIO_ICRB0_D			*
+ *		IIO_ICRB5_E		IIO_ICRB0_E			*
+ *		IIO_ICRB6_A		IIO_ICRB0_A			*
+ *		IIO_ICRB6_B		IIO_ICRB0_B			*
+ *		IIO_ICRB6_C		IIO_ICRB0_C			*
+ *		IIO_ICRB6_D		IIO_ICRB0_D			*
+ *		IIO_ICRB6_E		IIO_ICRB0_E			*
+ *		IIO_ICRB7_A		IIO_ICRB0_A			*
+ *		IIO_ICRB7_B		IIO_ICRB0_B			*
+ *		IIO_ICRB7_C		IIO_ICRB0_C			*
+ *		IIO_ICRB7_D		IIO_ICRB0_D			*
+ *		IIO_ICRB7_E		IIO_ICRB0_E			*
+ *		IIO_ICRB8_A		IIO_ICRB0_A			*
+ *		IIO_ICRB8_B		IIO_ICRB0_B			*
+ *		IIO_ICRB8_C		IIO_ICRB0_C			*
+ *		IIO_ICRB8_D		IIO_ICRB0_D			*
+ *		IIO_ICRB8_E		IIO_ICRB0_E			*
+ *		IIO_ICRB9_A		IIO_ICRB0_A			*
+ *		IIO_ICRB9_B		IIO_ICRB0_B			*
+ *		IIO_ICRB9_C		IIO_ICRB0_C			*
+ *		IIO_ICRB9_D		IIO_ICRB0_D			*
+ *		IIO_ICRB9_E		IIO_ICRB0_E			*
+ *		IIO_ICRBA_A		IIO_ICRB0_A			*
+ *		IIO_ICRBA_B		IIO_ICRB0_B			*
+ *		IIO_ICRBA_C		IIO_ICRB0_C			*
+ *		IIO_ICRBA_D		IIO_ICRB0_D			*
+ *		IIO_ICRBA_E		IIO_ICRB0_E			*
+ *		IIO_ICRBB_A		IIO_ICRB0_A			*
+ *		IIO_ICRBB_B		IIO_ICRB0_B			*
+ *		IIO_ICRBB_C		IIO_ICRB0_C			*
+ *		IIO_ICRBB_D		IIO_ICRB0_D			*
+ *		IIO_ICRBB_E		IIO_ICRB0_E			*
+ *		IIO_ICRBC_A		IIO_ICRB0_A			*
+ *		IIO_ICRBC_B		IIO_ICRB0_B			*
+ *		IIO_ICRBC_C		IIO_ICRB0_C			*
+ *		IIO_ICRBC_D		IIO_ICRB0_D			*
+ *		IIO_ICRBC_E		IIO_ICRB0_E			*
+ *		IIO_ICRBD_A		IIO_ICRB0_A			*
+ *		IIO_ICRBD_B		IIO_ICRB0_B			*
+ *		IIO_ICRBD_C		IIO_ICRB0_C			*
+ *		IIO_ICRBD_D		IIO_ICRB0_D			*
+ *		IIO_ICRBD_E		IIO_ICRB0_E			*
+ *		IIO_ICRBE_A		IIO_ICRB0_A			*
+ *		IIO_ICRBE_B		IIO_ICRB0_B			*
+ *		IIO_ICRBE_C		IIO_ICRB0_C			*
+ *		IIO_ICRBE_D		IIO_ICRB0_D			*
+ *		IIO_ICRBE_E		IIO_ICRB0_E			*
+ *									*
+ ************************************************************************/
 
 /*
  * Slightly friendlier names for some common registers.
  */
-#define IIO_WIDGET              IIO_WID      /* Widget identification */
-#define IIO_WIDGET_STAT         IIO_WSTAT    /* Widget status register */
-#define IIO_WIDGET_CTRL         IIO_WCR      /* Widget control register */
-#define IIO_PROTECT             IIO_ILAPR    /* IO interface protection */
-#define IIO_PROTECT_OVRRD       IIO_ILAPO    /* IO protect override */
-#define IIO_OUTWIDGET_ACCESS    IIO_IOWA     /* Outbound widget access */
-#define IIO_INWIDGET_ACCESS     IIO_IIWA     /* Inbound widget access */
-#define IIO_INDEV_ERR_MASK      IIO_IIDEM    /* Inbound device error mask */
-#define IIO_LLP_CSR             IIO_ILCSR    /* LLP control and status */
-#define IIO_LLP_LOG             IIO_ILLR     /* LLP log */
-#define IIO_XTALKCC_TOUT        IIO_IXCC     /* Xtalk credit count timeout*/
-#define IIO_XTALKTT_TOUT        IIO_IXTT     /* Xtalk tail timeout */
-#define IIO_IO_ERR_CLR          IIO_IECLR    /* IO error clear */
+#define IIO_WIDGET              IIO_WID		/* Widget identification */
+#define IIO_WIDGET_STAT         IIO_WSTAT	/* Widget status register */
+#define IIO_WIDGET_CTRL         IIO_WCR		/* Widget control register */
+#define IIO_PROTECT             IIO_ILAPR	/* IO interface protection */
+#define IIO_PROTECT_OVRRD       IIO_ILAPO	/* IO protect override */
+#define IIO_OUTWIDGET_ACCESS    IIO_IOWA	/* Outbound widget access */
+#define IIO_INWIDGET_ACCESS     IIO_IIWA	/* Inbound widget access */
+#define IIO_INDEV_ERR_MASK      IIO_IIDEM	/* Inbound device error mask */
+#define IIO_LLP_CSR             IIO_ILCSR	/* LLP control and status */
+#define IIO_LLP_LOG             IIO_ILLR	/* LLP log */
+#define IIO_XTALKCC_TOUT        IIO_IXCC	/* Xtalk credit count timeout */
+#define IIO_XTALKTT_TOUT        IIO_IXTT	/* Xtalk tail timeout */
+#define IIO_IO_ERR_CLR          IIO_IECLR	/* IO error clear */
 #define IIO_IGFX_0 		IIO_IGFX0
 #define IIO_IGFX_1 		IIO_IGFX1
 #define IIO_IBCT_0		IIO_IBCT0
···
 #define IIO_PRTE_A(_x)		(IIO_IPRTE0_A + (8 * (_x)))
 #define IIO_PRTE_B(_x)		(IIO_IPRTE0_B + (8 * (_x)))
 #define IIO_NUM_PRTES		8	/* Total number of PRB table entries */
-#define IIO_WIDPRTE_A(x)	IIO_PRTE_A(((x) - 8)) /* widget ID to its PRTE num */
-#define IIO_WIDPRTE_B(x)	IIO_PRTE_B(((x) - 8)) /* widget ID to its PRTE num */
+#define IIO_WIDPRTE_A(x)	IIO_PRTE_A(((x) - 8))	/* widget ID to its PRTE num */
+#define IIO_WIDPRTE_B(x)	IIO_PRTE_B(((x) - 8))	/* widget ID to its PRTE num */
 
-#define IIO_NUM_IPRBS 		(9) 
+#define IIO_NUM_IPRBS 		9
 
-#define IIO_LLP_CSR_IS_UP               0x00002000
+#define IIO_LLP_CSR_IS_UP		0x00002000
 #define IIO_LLP_CSR_LLP_STAT_MASK       0x00003000
 #define IIO_LLP_CSR_LLP_STAT_SHFT       12
 
···
 #define IIO_LLP_SN_MAX  0xffff	/* in ILLR SN_CNT, Max Sequence Number errors */
 
 /* key to IIO_PROTECT_OVRRD */
-#define IIO_PROTECT_OVRRD_KEY   0x53474972756c6573ull   /* "SGIrules" */
+#define IIO_PROTECT_OVRRD_KEY   0x53474972756c6573ull	/* "SGIrules" */
 
 /* BTE register names */
-#define IIO_BTE_STAT_0          IIO_IBLS_0   /* Also BTE length/status 0 */
-#define IIO_BTE_SRC_0           IIO_IBSA_0   /* Also BTE source address  0 */
-#define IIO_BTE_DEST_0          IIO_IBDA_0   /* Also BTE dest. address 0 */
-#define IIO_BTE_CTRL_0          IIO_IBCT_0   /* Also BTE control/terminate 0 */
-#define IIO_BTE_NOTIFY_0        IIO_IBNA_0   /* Also BTE notification 0 */
-#define IIO_BTE_INT_0           IIO_IBIA_0   /* Also BTE interrupt 0 */
-#define IIO_BTE_OFF_0           0            /* Base offset from BTE 0 regs. */
-#define IIO_BTE_OFF_1   	(IIO_IBLS_1 - IIO_IBLS_0) /* Offset from base to BTE 1 */
+#define IIO_BTE_STAT_0          IIO_IBLS_0	/* Also BTE length/status 0 */
+#define IIO_BTE_SRC_0           IIO_IBSA_0	/* Also BTE source address  0 */
+#define IIO_BTE_DEST_0          IIO_IBDA_0	/* Also BTE dest. address 0 */
+#define IIO_BTE_CTRL_0          IIO_IBCT_0	/* Also BTE control/terminate 0 */
+#define IIO_BTE_NOTIFY_0        IIO_IBNA_0	/* Also BTE notification 0 */
+#define IIO_BTE_INT_0           IIO_IBIA_0	/* Also BTE interrupt 0 */
+#define IIO_BTE_OFF_0           0	/* Base offset from BTE 0 regs. */
+#define IIO_BTE_OFF_1   	(IIO_IBLS_1 - IIO_IBLS_0)	/* Offset from base to BTE 1 */
 
 /* BTE register offsets from base */
 #define BTEOFF_STAT             0
-#define BTEOFF_SRC              (IIO_BTE_SRC_0 - IIO_BTE_STAT_0)
-#define BTEOFF_DEST             (IIO_BTE_DEST_0 - IIO_BTE_STAT_0)
-#define BTEOFF_CTRL             (IIO_BTE_CTRL_0 - IIO_BTE_STAT_0)
-#define BTEOFF_NOTIFY           (IIO_BTE_NOTIFY_0 - IIO_BTE_STAT_0)
-#define BTEOFF_INT              (IIO_BTE_INT_0 - IIO_BTE_STAT_0)
-
+#define BTEOFF_SRC      	(IIO_BTE_SRC_0 - IIO_BTE_STAT_0)
+#define BTEOFF_DEST     	(IIO_BTE_DEST_0 - IIO_BTE_STAT_0)
+#define BTEOFF_CTRL     	(IIO_BTE_CTRL_0 - IIO_BTE_STAT_0)
+#define BTEOFF_NOTIFY   	(IIO_BTE_NOTIFY_0 - IIO_BTE_STAT_0)
+#define BTEOFF_INT      	(IIO_BTE_INT_0 - IIO_BTE_STAT_0)
 
 /* names used in shub diags */
-#define IIO_BASE_BTE0   IIO_IBLS_0		
-#define IIO_BASE_BTE1   IIO_IBLS_1		
+#define IIO_BASE_BTE0   IIO_IBLS_0
+#define IIO_BASE_BTE1   IIO_IBLS_1
 
 /*
  * Macro which takes the widget number, and returns the
···
  * value _x is expected to be a widget number in the range
  * 0, 8 - 0xF
  */
-#define IIO_IOPRB(_x)   (IIO_IOPRB_0 + ( ( (_x) < HUB_WIDGET_ID_MIN ? \
-                        (_x) : \
-                        (_x) - (HUB_WIDGET_ID_MIN-1)) << 3) )
-
+#define IIO_IOPRB(_x)	(IIO_IOPRB_0 + ( ( (_x) < HUB_WIDGET_ID_MIN ? \
+                	(_x) : \
+                	(_x) - (HUB_WIDGET_ID_MIN-1)) << 3) )
 
 /* GFX Flow Control Node/Widget Register */
 #define IIO_IGFX_W_NUM_BITS	4	/* size of widget num field */
···
 	(((pi)     & IIO_IGFX_PI_NUM_MASK)<< IIO_IGFX_PI_NUM_SHIFT)|	 \
 	(((node)   & IIO_IGFX_N_NUM_MASK) << IIO_IGFX_N_NUM_SHIFT) |	 \
 	(((cpu)    & IIO_IGFX_P_NUM_MASK) << IIO_IGFX_P_NUM_SHIFT))
-
 
 /* Scratch registers (all bits available) */
 #define IIO_SCRATCH_REG0        IIO_ISCR0
···
 #define IIO_SCRATCH_BIT1_0      0x0000000000000001UL
 #define IIO_SCRATCH_BIT1_1      0x0000000000000002UL
 /* IO Translation Table Entries */
-#define IIO_NUM_ITTES   7               /* ITTEs numbered 0..6 */
-                                        /* Hw manuals number them 1..7! */
+#define IIO_NUM_ITTES   7	/* ITTEs numbered 0..6 */
+					/* Hw manuals number them 1..7! */
 /*
  * IIO_IMEM Register fields.
  */
-#define IIO_IMEM_W0ESD  0x1UL             /* Widget 0 shut down due to error */
-#define IIO_IMEM_B0ESD  (1UL << 4)        /* BTE 0 shut down due to error */
-#define IIO_IMEM_B1ESD  (1UL << 8)        /* BTE 1 Shut down due to error */
+#define IIO_IMEM_W0ESD  0x1UL	/* Widget 0 shut down due to error */
+#define IIO_IMEM_B0ESD	(1UL << 4)	/* BTE 0 shut down due to error */
+#define IIO_IMEM_B1ESD	(1UL << 8)	/* BTE 1 Shut down due to error */
 
 /*
  * As a permanent workaround for a bug in the PI side of the shub, we've
  * redefined big window 7 as small window 0.
  XXX does this still apply for SN1??
  */
-#define HUB_NUM_BIG_WINDOW      (IIO_NUM_ITTES - 1)
+#define HUB_NUM_BIG_WINDOW	(IIO_NUM_ITTES - 1)
 
 /*
  * Use the top big window as a surrogate for the first small window
···
 
 /*
  * CRB manipulation macros
- *      The CRB macros are slightly complicated, since there are up to
- *      four registers associated with each CRB entry.
+ *	The CRB macros are slightly complicated, since there are up to
+ *	four registers associated with each CRB entry.
  */
-#define IIO_NUM_CRBS            15      /* Number of CRBs */
-#define IIO_NUM_PC_CRBS         4       /* Number of partial cache CRBs */
+#define IIO_NUM_CRBS            15	/* Number of CRBs */
+#define IIO_NUM_PC_CRBS         4	/* Number of partial cache CRBs */
 #define IIO_ICRB_OFFSET         8
 #define IIO_ICRB_0              IIO_ICRB0_A
 #define IIO_ICRB_ADDR_SHFT	2	/* Shift to get proper address */
···
         #define IIO_FIRST_PC_ENTRY 12
  */
 
-#define IIO_ICRB_A(_x)  ((u64)(IIO_ICRB_0 + (6 * IIO_ICRB_OFFSET * (_x))))
-#define IIO_ICRB_B(_x)  ((u64)((char *)IIO_ICRB_A(_x) + 1*IIO_ICRB_OFFSET))
-#define IIO_ICRB_C(_x)  ((u64)((char *)IIO_ICRB_A(_x) + 2*IIO_ICRB_OFFSET))
-#define IIO_ICRB_D(_x)  ((u64)((char *)IIO_ICRB_A(_x) + 3*IIO_ICRB_OFFSET))
-#define IIO_ICRB_E(_x)  ((u64)((char *)IIO_ICRB_A(_x) + 4*IIO_ICRB_OFFSET))
+#define IIO_ICRB_A(_x)	((u64)(IIO_ICRB_0 + (6 * IIO_ICRB_OFFSET * (_x))))
+#define IIO_ICRB_B(_x)	((u64)((char *)IIO_ICRB_A(_x) + 1*IIO_ICRB_OFFSET))
+#define IIO_ICRB_C(_x)	((u64)((char *)IIO_ICRB_A(_x) + 2*IIO_ICRB_OFFSET))
+#define IIO_ICRB_D(_x)	((u64)((char *)IIO_ICRB_A(_x) + 3*IIO_ICRB_OFFSET))
+#define IIO_ICRB_E(_x)	((u64)((char *)IIO_ICRB_A(_x) + 4*IIO_ICRB_OFFSET))
 
 #define TNUM_TO_WIDGET_DEV(_tnum)	(_tnum & 0x7)
 
 /*
  * values for "ecode" field
  */
-#define IIO_ICRB_ECODE_DERR     0       /* Directory error due to IIO access */
-#define IIO_ICRB_ECODE_PERR     1       /* Poison error on IO access */
-#define IIO_ICRB_ECODE_WERR     2       /* Write error by IIO access
-                                         * e.g. WINV to a Read only line. */
-#define IIO_ICRB_ECODE_AERR     3       /* Access error caused by IIO access */
-#define IIO_ICRB_ECODE_PWERR    4       /* Error on partial write       */
-#define IIO_ICRB_ECODE_PRERR    5       /* Error on partial read        */
-#define IIO_ICRB_ECODE_TOUT     6       /* CRB timeout before deallocating */
-#define IIO_ICRB_ECODE_XTERR    7       /* Incoming xtalk pkt had error bit */
+#define IIO_ICRB_ECODE_DERR     0	/* Directory error due to IIO access */
+#define IIO_ICRB_ECODE_PERR     1	/* Poison error on IO access */
+#define IIO_ICRB_ECODE_WERR     2	/* Write error by IIO access
+					 * e.g. WINV to a Read only line. */
+#define IIO_ICRB_ECODE_AERR     3	/* Access error caused by IIO access */
+#define IIO_ICRB_ECODE_PWERR    4	/* Error on partial write */
+#define IIO_ICRB_ECODE_PRERR    5	/* Error on partial read  */
+#define IIO_ICRB_ECODE_TOUT     6	/* CRB timeout before deallocating */
+#define IIO_ICRB_ECODE_XTERR    7	/* Incoming xtalk pkt had error bit */
 
 /*
  * Values for field imsgtype
  */
-#define IIO_ICRB_IMSGT_XTALK    0       /* Incoming Meessage from Xtalk */
-#define IIO_ICRB_IMSGT_BTE      1       /* Incoming message from BTE    */
-#define IIO_ICRB_IMSGT_SN1NET   2       /* Incoming message from SN1 net */
-#define IIO_ICRB_IMSGT_CRB      3       /* Incoming message from CRB ???  */
+#define IIO_ICRB_IMSGT_XTALK    0	/* Incoming Meessage from Xtalk */
+#define IIO_ICRB_IMSGT_BTE      1	/* Incoming message from BTE    */
+#define IIO_ICRB_IMSGT_SN1NET   2	/* Incoming message from SN1 net */
+#define IIO_ICRB_IMSGT_CRB      3	/* Incoming message from CRB ???  */
 
 /*
  * values for field initiator.
  */
-#define IIO_ICRB_INIT_XTALK     0       /* Message originated in xtalk  */
-#define IIO_ICRB_INIT_BTE0      0x1     /* Message originated in BTE 0  */
-#define IIO_ICRB_INIT_SN1NET    0x2     /* Message originated in SN1net */
-#define IIO_ICRB_INIT_CRB       0x3     /* Message originated in CRB ?  */
-#define IIO_ICRB_INIT_BTE1      0x5     /* MEssage originated in BTE 1  */
+#define IIO_ICRB_INIT_XTALK     0	/* Message originated in xtalk  */
+#define IIO_ICRB_INIT_BTE0      0x1	/* Message originated in BTE 0  */
+#define IIO_ICRB_INIT_SN1NET    0x2	/* Message originated in SN1net */
+#define IIO_ICRB_INIT_CRB       0x3	/* Message originated in CRB ?  */
+#define IIO_ICRB_INIT_BTE1      0x5	/* MEssage originated in BTE 1  */
 
 /*
  * Number of credits Hub widget has while sending req/response to
···
  * Value of 3 is required by Xbow 1.1
  * We may be able to increase this to 4 with Xbow 1.2.
  */
-#define       HUBII_XBOW_CREDIT       3
-#define       HUBII_XBOW_REV2_CREDIT  4
+#define		   HUBII_XBOW_CREDIT       3
+#define		   HUBII_XBOW_REV2_CREDIT  4
 
 /*
  * Number of credits that xtalk devices should use when communicating
···
  */
 
 #define IIO_ICMR_CRB_VLD_SHFT   20
-#define IIO_ICMR_CRB_VLD_MASK   (0x7fffUL << IIO_ICMR_CRB_VLD_SHFT)
+#define IIO_ICMR_CRB_VLD_MASK	(0x7fffUL << IIO_ICMR_CRB_VLD_SHFT)
 
 #define IIO_ICMR_FC_CNT_SHFT    16
-#define IIO_ICMR_FC_CNT_MASK    (0xf << IIO_ICMR_FC_CNT_SHFT)
+#define IIO_ICMR_FC_CNT_MASK	(0xf << IIO_ICMR_FC_CNT_SHFT)
 
 #define IIO_ICMR_C_CNT_SHFT     4
-#define IIO_ICMR_C_CNT_MASK     (0xf << IIO_ICMR_C_CNT_SHFT)
+#define IIO_ICMR_C_CNT_MASK	(0xf << IIO_ICMR_C_CNT_SHFT)
 
-#define IIO_ICMR_PRECISE        (1UL << 52)
-#define IIO_ICMR_CLR_RPPD       (1UL << 13)
-#define IIO_ICMR_CLR_RQPD       (1UL << 12)
+#define IIO_ICMR_PRECISE	(1UL << 52)
+#define IIO_ICMR_CLR_RPPD	(1UL << 13)
+#define IIO_ICMR_CLR_RQPD	(1UL << 12)
 
 /*
  * IIO PIO Deallocation register field masks : (IIO_IPDR)
  XXX present but not needed in bedrock?  See the manual.
  */
-#define IIO_IPDR_PND    (1 << 4)
+#define IIO_IPDR_PND    	(1 << 4)
 
 /*
  * IIO CRB deallocation register field masks: (IIO_ICDR)
  */
-#define IIO_ICDR_PND    (1 << 4)
+#define IIO_ICDR_PND    	(1 << 4)
 
 /* 
  * IO BTE Length/Status (IIO_IBLS) register bit field definitions
···
 /*
  * IO Error Clear register bit field definitions
  */
-#define IECLR_PI1_FWD_INT	(1UL << 31)  /* clear PI1_FORWARD_INT in iidsr */
-#define IECLR_PI0_FWD_INT	(1UL << 30)  /* clear PI0_FORWARD_INT in iidsr */
-#define IECLR_SPUR_RD_HDR	(1UL << 29)  /* clear valid bit in ixss reg */
-#define IECLR_BTE1		(1UL << 18)  /* clear bte error 1 */
-#define IECLR_BTE0		(1UL << 17)  /* clear bte error 0 */
-#define IECLR_CRAZY		(1UL << 16)  /* clear crazy bit in wstat reg */
-#define IECLR_PRB_F		(1UL << 15)  /* clear err bit in PRB_F reg */
-#define IECLR_PRB_E		(1UL << 14)  /* clear err bit in PRB_E reg */
-#define IECLR_PRB_D		(1UL << 13)  /* clear err bit in PRB_D reg */
-#define IECLR_PRB_C		(1UL << 12)  /* clear err bit in PRB_C reg */
-#define IECLR_PRB_B		(1UL << 11)  /* clear err bit in PRB_B reg */
-#define IECLR_PRB_A		(1UL << 10)  /* clear err bit in PRB_A reg */
-#define IECLR_PRB_9		(1UL << 9)   /* clear err bit in PRB_9 reg */
-#define IECLR_PRB_8		(1UL << 8)   /* clear err bit in PRB_8 reg */
-#define IECLR_PRB_0		(1UL << 0)   /* clear err bit in PRB_0 reg */
+#define IECLR_PI1_FWD_INT	(1UL << 31)	/* clear PI1_FORWARD_INT in iidsr */
+#define IECLR_PI0_FWD_INT	(1UL << 30)	/* clear PI0_FORWARD_INT in iidsr */
+#define IECLR_SPUR_RD_HDR	(1UL << 29)	/* clear valid bit in ixss reg */
+#define IECLR_BTE1		(1UL << 18)	/* clear bte error 1 */
+#define IECLR_BTE0		(1UL << 17)	/* clear bte error 0 */
+#define IECLR_CRAZY		(1UL << 16)	/* clear crazy bit in wstat reg */
+#define IECLR_PRB_F		(1UL << 15)	/* clear err bit in PRB_F reg */
+#define IECLR_PRB_E		(1UL << 14)	/* clear err bit in PRB_E reg */
+#define IECLR_PRB_D		(1UL << 13)	/* clear err bit in PRB_D reg */
+#define IECLR_PRB_C		(1UL << 12)	/* clear err bit in PRB_C reg */
+#define IECLR_PRB_B		(1UL << 11)	/* clear err bit in PRB_B reg */
+#define IECLR_PRB_A		(1UL << 10)	/* clear err bit in PRB_A reg */
+#define IECLR_PRB_9		(1UL << 9)	/* clear err bit in PRB_9 reg */
+#define IECLR_PRB_8		(1UL << 8)	/* clear err bit in PRB_8 reg */
+#define IECLR_PRB_0		(1UL << 0)	/* clear err bit in PRB_0 reg */
 
 /*
  * IIO CRB control register Fields: IIO_ICCR 
  */
-#define	IIO_ICCR_PENDING	(0x10000)
-#define	IIO_ICCR_CMD_MASK	(0xFF)
-#define	IIO_ICCR_CMD_SHFT	(7)
-#define	IIO_ICCR_CMD_NOP	(0x0)	/* No Op */
-#define	IIO_ICCR_CMD_WAKE	(0x100) /* Reactivate CRB entry and process */
-#define	IIO_ICCR_CMD_TIMEOUT	(0x200)	/* Make CRB timeout & mark invalid */
-#define	IIO_ICCR_CMD_EJECT	(0x400)	/* Contents of entry written to memory 
+#define	IIO_ICCR_PENDING	0x10000
+#define	IIO_ICCR_CMD_MASK	0xFF
+#define	IIO_ICCR_CMD_SHFT	7
+#define	IIO_ICCR_CMD_NOP	0x0	/* No Op */
+#define	IIO_ICCR_CMD_WAKE	0x100	/* Reactivate CRB entry and process */
+#define	IIO_ICCR_CMD_TIMEOUT	0x200	/* Make CRB timeout & mark invalid */
+#define	IIO_ICCR_CMD_EJECT	0x400	/* Contents of entry written to memory
 					 * via a WB
 					 */
-#define	IIO_ICCR_CMD_FLUSH	(0x800)
+#define	IIO_ICCR_CMD_FLUSH	0x800
 
 /*
  *
···
  * Easy access macros for CRBs, all 5 registers (A-E)
  */
 typedef ii_icrb0_a_u_t icrba_t;
-#define a_sidn          ii_icrb0_a_fld_s.ia_sidn
-#define a_tnum          ii_icrb0_a_fld_s.ia_tnum
+#define a_sidn		ii_icrb0_a_fld_s.ia_sidn
+#define a_tnum		ii_icrb0_a_fld_s.ia_tnum
 #define a_addr          ii_icrb0_a_fld_s.ia_addr
 #define a_valid         ii_icrb0_a_fld_s.ia_vld
 #define a_iow           ii_icrb0_a_fld_s.ia_iow
···
 #define c_source        ii_icrb0_c_fld_s.ic_source
 #define c_regvalue	ii_icrb0_c_regval
 
-
 typedef ii_icrb0_d_u_t icrbd_t;
 #define d_sleep         ii_icrb0_d_fld_s.id_sleep
 #define d_pricnt        ii_icrb0_d_fld_s.id_pr_cnt
 #define d_pripsc        ii_icrb0_d_fld_s.id_pr_psc
 #define d_bteop         ii_icrb0_d_fld_s.id_bte_op
-#define d_bteaddr       ii_icrb0_d_fld_s.id_pa_be /* ic_pa_be fld has 2 names*/
-#define d_benable       ii_icrb0_d_fld_s.id_pa_be /* ic_pa_be fld has 2 names*/
+#define d_bteaddr       ii_icrb0_d_fld_s.id_pa_be	/* ic_pa_be fld has 2 names */
+#define d_benable       ii_icrb0_d_fld_s.id_pa_be	/* ic_pa_be fld has 2 names */
 #define d_regvalue	ii_icrb0_d_regval
 
 typedef ii_icrb0_e_u_t icrbe_t;
···
 #define icrbe_context   ii_icrb0_e_fld_s.ie_context
 #define icrbe_timeout   ii_icrb0_e_fld_s.ie_timeout
 #define e_regvalue	ii_icrb0_e_regval
-
 
 /* Number of widgets supported by shub */
 #define HUB_NUM_WIDGET          9
···
 
 #define LNK_STAT_WORKING        0x2		/* LLP is working */
 
-#define IIO_WSTAT_ECRAZY        (1ULL << 32)    /* Hub gone crazy */
-#define IIO_WSTAT_TXRETRY       (1ULL << 9)     /* Hub Tx Retry timeout */
-#define IIO_WSTAT_TXRETRY_MASK  (0x7F)   /* should be 0xFF?? */
-#define IIO_WSTAT_TXRETRY_SHFT  (16)
-#define IIO_WSTAT_TXRETRY_CNT(w)        (((w) >> IIO_WSTAT_TXRETRY_SHFT) & \
-                                          IIO_WSTAT_TXRETRY_MASK)
+#define IIO_WSTAT_ECRAZY	(1ULL << 32)	/* Hub gone crazy */
+#define IIO_WSTAT_TXRETRY	(1ULL << 9)	/* Hub Tx Retry timeout */
+#define IIO_WSTAT_TXRETRY_MASK  0x7F		/* should be 0xFF?? */
+#define IIO_WSTAT_TXRETRY_SHFT  16
+#define IIO_WSTAT_TXRETRY_CNT(w)	(((w) >> IIO_WSTAT_TXRETRY_SHFT) & \
+                          		IIO_WSTAT_TXRETRY_MASK)
 
 /* Number of II perf. counters we can multiplex at once */
 
 #define IO_PERF_SETS	32
 
 /* Bit for the widget in inbound access register */
-#define IIO_IIWA_WIDGET(_w)     ((uint64_t)(1ULL << _w))
+#define IIO_IIWA_WIDGET(_w)	((uint64_t)(1ULL << _w))
 /* Bit for the widget in outbound access register */
-#define IIO_IOWA_WIDGET(_w)     ((uint64_t)(1ULL << _w))
+#define IIO_IOWA_WIDGET(_w)	((uint64_t)(1ULL << _w))
 
 /* NOTE: The following define assumes that we are going to get
  * widget numbers from 8 thru F and the device numbers within
  * widget from 0 thru 7.
  */
-#define IIO_IIDEM_WIDGETDEV_MASK(w, d)  ((uint64_t)(1ULL << (8 * ((w) - 8) + (d))))
+#define IIO_IIDEM_WIDGETDEV_MASK(w, d)	((uint64_t)(1ULL << (8 * ((w) - 8) + (d))))
 
 /* IO Interrupt Destination Register */
 #define IIO_IIDSR_SENT_SHIFT    28
···
 #define IIO_IIDSR_LVL_MASK      0x000000ff
 
 /* Xtalk timeout threshhold register (IIO_IXTT) */
-#define IXTT_RRSP_TO_SHFT	55	   /* read response timeout */
+#define IXTT_RRSP_TO_SHFT	55	/* read response timeout */
 #define IXTT_RRSP_TO_MASK	(0x1FULL << IXTT_RRSP_TO_SHFT)
-#define IXTT_RRSP_PS_SHFT	32	   /* read responsed TO prescalar */
+#define IXTT_RRSP_PS_SHFT	32	/* read responsed TO prescalar */
 #define IXTT_RRSP_PS_MASK	(0x7FFFFFULL << IXTT_RRSP_PS_SHFT)
-#define IXTT_TAIL_TO_SHFT	0	   /* tail timeout counter threshold */
+#define IXTT_TAIL_TO_SHFT	0	/* tail timeout counter threshold */
 #define IXTT_TAIL_TO_MASK	(0x3FFFFFFULL << IXTT_TAIL_TO_SHFT)
 
 /*
···
  */
 
 typedef union hubii_wcr_u {
-        uint64_t      wcr_reg_value;
-        struct {
-	  uint64_t	wcr_widget_id:   4,     /* LLP crossbar credit */
-			wcr_tag_mode:	 1,	/* Tag mode */
-			wcr_rsvd1:	 8,	/* Reserved */
-			wcr_xbar_crd:	 3,	/* LLP crossbar credit */
-			wcr_f_bad_pkt:	 1,	/* Force bad llp pkt enable */
-			wcr_dir_con:	 1,	/* widget direct connect */
-			wcr_e_thresh:	 5,	/* elasticity threshold */
-			wcr_rsvd:	41;	/* unused */
-        } wcr_fields_s;
+	uint64_t wcr_reg_value;
+	struct {
+		uint64_t wcr_widget_id:4,	/* LLP crossbar credit */
+		 wcr_tag_mode:1,	/* Tag mode */
+		 wcr_rsvd1:8,	/* Reserved */
+		 wcr_xbar_crd:3,	/* LLP crossbar credit */
+		 wcr_f_bad_pkt:1,	/* Force bad llp pkt enable */
+		 wcr_dir_con:1,	/* widget direct connect */
+		 wcr_e_thresh:5,	/* elasticity threshold */
+		 wcr_rsvd:41;	/* unused */
+	} wcr_fields_s;
 } hubii_wcr_t;
 
 #define iwcr_dir_con    wcr_fields_s.wcr_dir_con
···
    performed */
 
 typedef union io_perf_sel {
-        uint64_t perf_sel_reg;
-        struct {
-               uint64_t	perf_ippr0 :  4,
-				perf_ippr1 :  4,
-				perf_icct  :  8,
-				perf_rsvd  : 48;
-        } perf_sel_bits;
+	uint64_t perf_sel_reg;
+	struct {
+		uint64_t perf_ippr0:4, perf_ippr1:4, perf_icct:8, perf_rsvd:48;
+	} perf_sel_bits;
 } io_perf_sel_t;
 
 /* io_perf_cnt is to extract the count from the shub registers. Due to
    hardware problems there is only one counter, not two. */
 
 typedef union io_perf_cnt {
-        uint64_t      perf_cnt;
-        struct {
-               uint64_t	perf_cnt   : 20,
-				perf_rsvd2 : 12,
-				perf_rsvd1 : 32;
-        } perf_cnt_bits;
+	uint64_t perf_cnt;
+	struct {
+		uint64_t perf_cnt:20, perf_rsvd2:12, perf_rsvd1:32;
+	} perf_cnt_bits;
 
 } io_perf_cnt_t;
 
 typedef union iprte_a {
-	uint64_t	entry;
+	uint64_t entry;
 	struct {
-		uint64_t	i_rsvd_1                  :	 3;
-		uint64_t	i_addr			  :	38;
-		uint64_t	i_init			  :	 3;
-		uint64_t	i_source		  :	 8;
-		uint64_t	i_rsvd			  :	 2;
-		uint64_t	i_widget		  :	 4;
-		uint64_t	i_to_cnt		  :	 5;
-		uint64_t       i_vld                     :      1;
+		uint64_t i_rsvd_1:3;
+		uint64_t i_addr:38;
+		uint64_t i_init:3;
+		uint64_t i_source:8;
+		uint64_t i_rsvd:2;
+		uint64_t i_widget:4;
+		uint64_t i_to_cnt:5;
+		uint64_t i_vld:1;
 	} iprte_fields;
 } iprte_a_t;
 
-#endif /* _ASM_IA64_SN_SHUBIO_H */
-
+#endif				/* _ASM_IA64_SN_SHUBIO_H */

include/asm-ia64/sn/sn_cpuid.h

···
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2000-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2000-2005 Silicon Graphics, Inc. All rights reserved.
  */
 
 
···
  * NOTE: on non-MP systems, only cpuid 0 exists
  */
 
-extern short physical_node_map[];			/* indexed by nasid to get cnode */
+extern short physical_node_map[];	/* indexed by nasid to get cnode */
 
 /*
  * Macros for retrieving info about current cpu
  */
-#define get_nasid()			(nodepda->phys_cpuid[smp_processor_id()].nasid)
-#define get_subnode()			(nodepda->phys_cpuid[smp_processor_id()].subnode)
-#define get_slice()			(nodepda->phys_cpuid[smp_processor_id()].slice)
-#define get_cnode()			(nodepda->phys_cpuid[smp_processor_id()].cnode)
-#define get_sapicid()			((ia64_getreg(_IA64_REG_CR_LID) >> 16) & 0xffff)
+#define get_nasid()	(sn_nodepda->phys_cpuid[smp_processor_id()].nasid)
+#define get_subnode()	(sn_nodepda->phys_cpuid[smp_processor_id()].subnode)
+#define get_slice()	(sn_nodepda->phys_cpuid[smp_processor_id()].slice)
+#define get_cnode()	(sn_nodepda->phys_cpuid[smp_processor_id()].cnode)
+#define get_sapicid()	((ia64_getreg(_IA64_REG_CR_LID) >> 16) & 0xffff)
 
 /*
  * Macros for retrieving info about an arbitrary cpu
  *	cpuid - logical cpu id
  */
-#define cpuid_to_nasid(cpuid)		(nodepda->phys_cpuid[cpuid].nasid)
-#define cpuid_to_subnode(cpuid)		(nodepda->phys_cpuid[cpuid].subnode)
-#define cpuid_to_slice(cpuid)		(nodepda->phys_cpuid[cpuid].slice)
+#define cpuid_to_nasid(cpuid)		(sn_nodepda->phys_cpuid[cpuid].nasid)
+#define cpuid_to_subnode(cpuid)		(sn_nodepda->phys_cpuid[cpuid].subnode)
+#define cpuid_to_slice(cpuid)		(sn_nodepda->phys_cpuid[cpuid].slice)
 #define cpuid_to_cnodeid(cpuid)		(physical_node_map[cpuid_to_nasid(cpuid)])
 
 
···
 
 /*
  * cnodeid_to_nasid - convert a cnodeid to a NASID
- *	Macro relies on pg_data for a node being on the node itself.
- *	Just extract the NASID from the pointer.
- *
  */
-#define cnodeid_to_nasid(cnodeid)	pda->cnodeid_to_nasid_table[cnodeid]
+#define cnodeid_to_nasid(cnodeid)	(sn_cnodeid_to_nasid[cnodeid])
  
 /*
  * nasid_to_cnodeid - convert a NASID to a cnodeid

include/asm-ia64/sn/sn_fru.h

···
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1992-1997,1999-2004 Silicon Graphics, Inc. All rights reserved.
- */
-#ifndef _ASM_IA64_SN_SN_FRU_H
-#define _ASM_IA64_SN_SN_FRU_H
-
-#define MAX_DIMMS			8	 /* max # of dimm banks */
-#define MAX_PCIDEV			8	 /* max # of pci devices on a pci bus */
-
-typedef unsigned char confidence_t;
-
-typedef struct kf_mem_s {
-	confidence_t km_confidence; /* confidence level that the memory is bad
-				     * is this necessary ?
-				     */
-	confidence_t km_dimm[MAX_DIMMS];
-				    /* confidence level that dimm[i] is bad
-				     *I think this is the right number
-				     */
-
-} kf_mem_t;
-
-typedef struct kf_cpu_s {
-	confidence_t	kc_confidence; /* confidence level that cpu is bad */
-	confidence_t	kc_icache; /* confidence level that instr. cache is bad */
-	confidence_t	kc_dcache; /* confidence level that data   cache is bad */
-	confidence_t	kc_scache; /* confidence level that sec.   cache is bad */
-	confidence_t	kc_sysbus; /* confidence level that sysad/cmd/state bus is bad */
-} kf_cpu_t;
-
-
-typedef struct kf_pci_bus_s {
-	confidence_t	kpb_belief;	/* confidence level  that the  pci bus is bad */
-	confidence_t	kpb_pcidev_belief[MAX_PCIDEV];
-					/* confidence level that the pci dev is bad */
-} kf_pci_bus_t;
-
-
-#endif /* _ASM_IA64_SN_SN_FRU_H */
-

include/asm-ia64/sn/sn_sal.h

···
 ia64_sn_partition_serial_get(void)
 {
 	struct ia64_sal_retval ret_stuff;
-	SAL_CALL(ret_stuff, SN_SAL_PARTITION_SERIAL_GET, 0, 0, 0, 0, 0, 0, 0);
+	ia64_sal_oemcall_reentrant(&ret_stuff, SN_SAL_PARTITION_SERIAL_GET, 0,
+				   0, 0, 0, 0, 0, 0);
 	if (ret_stuff.status != 0)
 	    return 0;
 	return ret_stuff.v0;
···
 
 static inline u64
 sn_partition_serial_number_val(void) {
-	if (sn_partition_serial_number) {
-		return(sn_partition_serial_number);
-	} else {
-		return(sn_partition_serial_number = ia64_sn_partition_serial_get());
+	if (unlikely(sn_partition_serial_number == 0)) {
+		sn_partition_serial_number = ia64_sn_partition_serial_get();
 	}
+	return sn_partition_serial_number;
 }
 
 /*
···
 ia64_sn_sysctl_partition_get(nasid_t nasid)
 {
 	struct ia64_sal_retval ret_stuff;
-	SAL_CALL(ret_stuff, SN_SAL_SYSCTL_PARTITION_GET, nasid,
-		 0, 0, 0, 0, 0, 0);
+	ia64_sal_oemcall_nolock(&ret_stuff, SN_SAL_SYSCTL_PARTITION_GET, nasid,
+				0, 0, 0, 0, 0, 0);
 	if (ret_stuff.status != 0)
 	    return INVALID_PARTID;
 	return ((partid_t)ret_stuff.v0);
···
 
 static inline partid_t
 sn_local_partid(void) {
-	if (sn_partid < 0) {
-		return (sn_partid = ia64_sn_sysctl_partition_get(cpuid_to_nasid(smp_processor_id())));
-	} else {
-		return sn_partid;
+	if (unlikely(sn_partid < 0)) {
+		sn_partid = ia64_sn_sysctl_partition_get(cpuid_to_nasid(smp_processor_id()));
 	}
+	return sn_partid;
+}
+
+/*
+ * Returns the physical address of the partition's reserved page through
+ * an iterative number of calls.
+ *
+ * On first call, 'cookie' and 'len' should be set to 0, and 'addr'
+ * set to the nasid of the partition whose reserved page's address is
+ * being sought.
+ * On subsequent calls, pass the values, that were passed back on the
+ * previous call.
+ *
+ * While the return status equals SALRET_MORE_PASSES, keep calling
+ * this function after first copying 'len' bytes starting at 'addr'
+ * into 'buf'. Once the return status equals SALRET_OK, 'addr' will
+ * be the physical address of the partition's reserved page. If the
+ * return status equals neither of these, an error as occurred.
+ */
+static inline s64
+sn_partition_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
+{
+	struct ia64_sal_retval rv;
+	ia64_sal_oemcall_reentrant(&rv, SN_SAL_GET_PARTITION_ADDR, *cookie,
+				   *addr, buf, *len, 0, 0, 0);
+	*cookie = rv.v0;
+	*addr = rv.v1;
+	*len = rv.v2;
+	return rv.status;
 }
 
 /*
···
 sn_register_xp_addr_region(u64 paddr, u64 len, int operation)
 {
 	struct ia64_sal_retval ret_stuff;
-	SAL_CALL(ret_stuff, SN_SAL_XP_ADDR_REGION, paddr, len, (u64)operation,
-		 0, 0, 0, 0);
+	ia64_sal_oemcall(&ret_stuff, SN_SAL_XP_ADDR_REGION, paddr, len,
+			 (u64)operation, 0, 0, 0, 0);
 	return ret_stuff.status;
 }
 
···
 	} else {
 		call = SN_SAL_NO_FAULT_ZONE_PHYSICAL;
 	}
-	SAL_CALL(ret_stuff, call, start_addr, end_addr, return_addr, (u64)1,
-		 0, 0, 0);
+	ia64_sal_oemcall(&ret_stuff, call, start_addr, end_addr, return_addr,
+			 (u64)1, 0, 0, 0);
 	return ret_stuff.status;
 }
 
···
 sn_change_coherence(u64 *new_domain, u64 *old_domain)
 {
 	struct ia64_sal_retval ret_stuff;
-	SAL_CALL(ret_stuff, SN_SAL_COHERENCE, new_domain, old_domain, 0, 0,
-		 0, 0, 0);
+	ia64_sal_oemcall(&ret_stuff, SN_SAL_COHERENCE, (u64)new_domain,
+			 (u64)old_domain, 0, 0, 0, 0, 0);
 	return ret_stuff.status;
 }
 
···
 	cnodeid = nasid_to_cnodeid(get_node_number(paddr));
 	// spin_lock(&NODEPDA(cnodeid)->bist_lock);
 	local_irq_save(irq_flags);
-	SAL_CALL_NOLOCK(ret_stuff, SN_SAL_MEMPROTECT, paddr, len, nasid_array,
-		 perms, 0, 0, 0);
+	ia64_sal_oemcall_nolock(&ret_stuff, SN_SAL_MEMPROTECT, paddr, len,
+				(u64)nasid_array, perms, 0, 0, 0);
 	local_irq_restore(irq_flags);
 	// spin_unlock(&NODEPDA(cnodeid)->bist_lock);
 	return ret_stuff.status;

include/asm-ia64/sn/sndrv.h

···
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (c) 2002-2004 Silicon Graphics, Inc.  All Rights Reserved.
- */
-
-#ifndef _ASM_IA64_SN_SNDRV_H
-#define _ASM_IA64_SN_SNDRV_H
-
-/* ioctl commands */
-#define SNDRV_GET_ROUTERINFO		1
-#define SNDRV_GET_INFOSIZE		2
-#define SNDRV_GET_HUBINFO		3
-#define SNDRV_GET_FLASHLOGSIZE		4
-#define SNDRV_SET_FLASHSYNC		5
-#define SNDRV_GET_FLASHLOGDATA		6
-#define SNDRV_GET_FLASHLOGALL		7
-
-#define SNDRV_SET_HISTOGRAM_TYPE	14
-
-#define SNDRV_ELSC_COMMAND		19
-#define	SNDRV_CLEAR_LOG			20
-#define	SNDRV_INIT_LOG			21
-#define	SNDRV_GET_PIMM_PSC		22
-#define SNDRV_SET_PARTITION		23
-#define SNDRV_GET_PARTITION		24
-
-/* see synergy_perf_ioctl() */
-#define SNDRV_GET_SYNERGY_VERSION	30
-#define SNDRV_GET_SYNERGY_STATUS	31
-#define SNDRV_GET_SYNERGYINFO		32
-#define SNDRV_SYNERGY_APPEND		33
-#define SNDRV_SYNERGY_ENABLE		34
-#define SNDRV_SYNERGY_FREQ		35
-
-/* Devices */
-#define SNDRV_UKNOWN_DEVICE		-1
-#define SNDRV_ROUTER_DEVICE		1
-#define SNDRV_HUB_DEVICE		2
-#define SNDRV_ELSC_NVRAM_DEVICE		3
-#define SNDRV_ELSC_CONTROLLER_DEVICE	4
-#define SNDRV_SYSCTL_SUBCH		5
-#define SNDRV_SYNERGY_DEVICE		6
-
-#endif /* _ASM_IA64_SN_SNDRV_H */

include/asm-ia64/sn/xp.h

···
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2004-2005 Silicon Graphics, Inc. All rights reserved.
+ */
+
+
+/*
+ * External Cross Partition (XP) structures and defines.
+ */
+
+
+#ifndef _ASM_IA64_SN_XP_H
+#define _ASM_IA64_SN_XP_H
+
+
+#include <linux/version.h>
+#include <linux/cache.h>
+#include <linux/hardirq.h>
+#include <asm/sn/types.h>
+#include <asm/sn/bte.h>
+
+
+#ifdef USE_DBUG_ON
+#define DBUG_ON(condition)	BUG_ON(condition)
+#else
+#define DBUG_ON(condition)
+#endif
+
+
+/*
+ * Define the maximum number of logically defined partitions the system
+ * can support. It is constrained by the maximum number of hardware
+ * partitionable regions. The term 'region' in this context refers to the
+ * minimum number of nodes that can comprise an access protection grouping.
+ * The access protection is in regards to memory, IPI and IOI.
+ *
+ * The maximum number of hardware partitionable regions is equal to the
+ * maximum number of nodes in the entire system divided by the minimum number
+ * of nodes that comprise an access protection grouping.
+ */
+#define XP_MAX_PARTITIONS	64
+
+
+/*
+ * Define the number of u64s required to represent all the C-brick nasids
+ * as a bitmap.  The cross-partition kernel modules deal only with
+ * C-brick nasids, thus the need for bitmaps which don't account for
+ * odd-numbered (non C-brick) nasids.
+ */
+#define XP_MAX_PHYSNODE_ID	(MAX_PHYSNODE_ID / 2)
+#define XP_NASID_MASK_BYTES	((XP_MAX_PHYSNODE_ID + 7) / 8)
+#define XP_NASID_MASK_WORDS	((XP_MAX_PHYSNODE_ID + 63) / 64)
+
+
+/*
+ * Wrapper for bte_copy() that should it return a failure status will retry
+ * the bte_copy() once in the hope that the failure was due to a temporary
+ * aberration (i.e., the link going down temporarily).
+ *
+ * See bte_copy for definition of the input parameters.
+ *
+ * Note: xp_bte_copy() should never be called while holding a spinlock.
+ */
+static inline bte_result_t
+xp_bte_copy(u64 src, u64 dest, u64 len, u64 mode, void *notification)
+{
+	bte_result_t ret;
+
+
+	ret = bte_copy(src, dest, len, mode, notification);
+
+	if (ret != BTE_SUCCESS) {
+		if (!in_interrupt()) {
+			cond_resched();
+		}
+		ret = bte_copy(src, dest, len, mode, notification);
+	}
+
+	return ret;
+}
+
+
+/*
+ * XPC establishes channel connections between the local partition and any
+ * other partition that is currently up. Over these channels, kernel-level
+ * `users' can communicate with their counterparts on the other partitions.
+ *
+ * The maxinum number of channels is limited to eight. For performance reasons,
+ * the internal cross partition structures require sixteen bytes per channel,
+ * and eight allows all of this interface-shared info to fit in one cache line.
+ *
+ * XPC_NCHANNELS reflects the total number of channels currently defined.
+ * If the need for additional channels arises, one can simply increase
+ * XPC_NCHANNELS accordingly. If the day should come where that number
+ * exceeds the MAXIMUM number of channels allowed (eight), then one will need
+ * to make changes to the XPC code to allow for this.
+ */
+#define XPC_MEM_CHANNEL		0	/* memory channel number */
+#define	XPC_NET_CHANNEL		1	/* network channel number */
+
+#define	XPC_NCHANNELS		2	/* #of defined channels */
+#define XPC_MAX_NCHANNELS	8	/* max #of channels allowed */
+
+#if XPC_NCHANNELS > XPC_MAX_NCHANNELS
+#error	XPC_NCHANNELS exceeds MAXIMUM allowed.
+#endif
+
+
+/*
+ * The format of an XPC message is as follows:
+ *
+ *      +-------+--------------------------------+
+ *      | flags |////////////////////////////////|
+ *      +-------+--------------------------------+
+ *      |             message #                  |
+ *      +----------------------------------------+
+ *      |     payload (user-defined message)     |
+ *      |                                        |
+ *         		:
+ *      |                                        |
+ *      +----------------------------------------+
+ *
+ * The size of the payload is defined by the user via xpc_connect(). A user-
+ * defined message resides in the payload area.
+ *
+ * The user should have no dealings with the message header, but only the
+ * message's payload. When a message entry is allocated (via xpc_allocate())
+ * a pointer to the payload area is returned and not the actual beginning of
+ * the XPC message. The user then constructs a message in the payload area
+ * and passes that pointer as an argument on xpc_send() or xpc_send_notify().
+ *
+ * The size of a message entry (within a message queue) must be a cacheline
+ * sized multiple in order to facilitate the BTE transfer of messages from one
+ * message queue to another. A macro, XPC_MSG_SIZE(), is provided for the user
+ * that wants to fit as many msg entries as possible in a given memory size
+ * (e.g. a memory page).
+ */
+struct xpc_msg {
+	u8 flags;		/* FOR XPC INTERNAL USE ONLY */
+	u8 reserved[7];		/* FOR XPC INTERNAL USE ONLY */
+	s64 number;		/* FOR XPC INTERNAL USE ONLY */
+
+	u64 payload;		/* user defined portion of message */
+};
+
+
+#define XPC_MSG_PAYLOAD_OFFSET	(u64) (&((struct xpc_msg *)0)->payload)
+#define XPC_MSG_SIZE(_payload_size) \
+		L1_CACHE_ALIGN(XPC_MSG_PAYLOAD_OFFSET + (_payload_size))
+
+
+/*
+ * Define the return values and values passed to user's callout functions.
+ * (It is important to add new value codes at the end just preceding
+ * xpcUnknownReason, which must have the highest numerical value.)
+ */
+enum xpc_retval {
+	xpcSuccess = 0,
+
+	xpcNotConnected,	/*  1: channel is not connected */
+	xpcConnected,		/*  2: channel connected (opened) */
+	xpcRETIRED1,		/*  3: (formerly xpcDisconnected) */
+
+	xpcMsgReceived,		/*  4: message received */
+	xpcMsgDelivered,	/*  5: message delivered and acknowledged */
+
+	xpcRETIRED2,		/*  6: (formerly xpcTransferFailed) */
+
+	xpcNoWait,		/*  7: operation would require wait */
+	xpcRetry,		/*  8: retry operation */
+	xpcTimeout,		/*  9: timeout in xpc_allocate_msg_wait() */
+	xpcInterrupted,		/* 10: interrupted wait */
+
+	xpcUnequalMsgSizes,	/* 11: message size disparity between sides */
+	xpcInvalidAddress,	/* 12: invalid address */
+
+	xpcNoMemory,		/* 13: no memory available for XPC structures */
+	xpcLackOfResources,	/* 14: insufficient resources for operation */
+	xpcUnregistered,	/* 15: channel is not registered */
+	xpcAlreadyRegistered,	/* 16: channel is already registered */
+
+	xpcPartitionDown,	/* 17: remote partition is down */
+	xpcNotLoaded,		/* 18: XPC module is not loaded */
+	xpcUnloading,		/* 19: this side is unloading XPC module */
+
+	xpcBadMagic,		/* 20: XPC MAGIC string not found */
+
+	xpcReactivating,	/* 21: remote partition was reactivated */
+
+	xpcUnregistering,	/* 22: this side is unregistering channel */
+	xpcOtherUnregistering,	/* 23: other side is unregistering channel */
+
+	xpcCloneKThread,	/* 24: cloning kernel thread */
+	xpcCloneKThreadFailed,	/* 25: cloning kernel thread failed */
+
+	xpcNoHeartbeat,		/* 26: remote partition has no heartbeat */
+
+	xpcPioReadError,	/* 27: PIO read error */
+	xpcPhysAddrRegFailed,	/* 28: registration of phys addr range failed */
+
+	xpcBteDirectoryError,	/* 29: maps to BTEFAIL_DIR */
+	xpcBtePoisonError,	/* 30: maps to BTEFAIL_POISON */
+	xpcBteWriteError,	/* 31: maps to BTEFAIL_WERR */
+	xpcBteAccessError,	/* 32: maps to BTEFAIL_ACCESS */
+	xpcBtePWriteError,	/* 33: maps to BTEFAIL_PWERR */
+	xpcBtePReadError,	/* 34: maps to BTEFAIL_PRERR */
+	xpcBteTimeOutError,	/* 35: maps to BTEFAIL_TOUT */
+	xpcBteXtalkError,	/* 36: maps to BTEFAIL_XTERR */
+	xpcBteNotAvailable,	/* 37: maps to BTEFAIL_NOTAVAIL */
+	xpcBteUnmappedError,	/* 38: unmapped BTEFAIL_ error */
+
+	xpcBadVersion,		/* 39: bad version number */
+	xpcVarsNotSet,		/* 40: the XPC variables are not set up */
+	xpcNoRsvdPageAddr,	/* 41: unable to get rsvd page's phys addr */
+	xpcInvalidPartid,	/* 42: invalid partition ID */
+	xpcLocalPartid,		/* 43: local partition ID */
+
+	xpcUnknownReason	/* 44: unknown reason -- must be last in list */
+};
+
+
+/*
+ * Define the callout function types used by XPC to update the user on
+ * connection activity and state changes (via the user function registered by
+ * xpc_connect()) and to notify them of messages received and delivered (via
+ * the user function registered by xpc_send_notify()).
+ *
+ * The two function types are xpc_channel_func and xpc_notify_func and
+ * both share the following arguments, with the exception of "data", which
+ * only xpc_channel_func has.
+ *
+ * Arguments:
+ *
+ *	reason - reason code. (See following table.)
+ *	partid - partition ID associated with condition.
+ *	ch_number - channel # associated with condition.
+ *	data - pointer to optional data. (See following table.)
+ *	key - pointer to optional user-defined value provided as the "key"
+ *	      argument to xpc_connect() or xpc_send_notify().
+ *
+ * In the following table the "Optional Data" column applies to callouts made
+ * to functions registered by xpc_connect(). A "NA" in that column indicates
+ * that this reason code can be passed to functions registered by
+ * xpc_send_notify() (i.e. they don't have data arguments).
+ *
+ * Also, the first three reason codes in the following table indicate
+ * success, whereas the others indicate failure. When a failure reason code
+ * is received, one can assume that the channel is not connected.
+ *
+ *
+ * Reason Code          | Cause                          | Optional Data
+ * =====================+================================+=====================
+ * xpcConnected         | connection has been established| max #of entries
+ *                      | to the specified partition on  | allowed in message
+ *                      | the specified channel          | queue
+ * ---------------------+--------------------------------+---------------------
+ * xpcMsgReceived       | an XPC message arrived from    | address of payload
+ *                      | the specified partition on the |
+ *                      | specified channel              | [the user must call
+ *                      |                                | xpc_received() when
+ *                      |                                | finished with the
+ *                      |                                | payload]
+ * ---------------------+--------------------------------+---------------------
+ * xpcMsgDelivered      | notification that the message  | NA
+ *                      | was delivered to the intended  |
+ *                      | recipient and that they have   |
+ *                      | acknowledged its receipt by    |
+ *                      | calling xpc_received()         |
+ * =====================+================================+=====================
+ * xpcUnequalMsgSizes   | can't connect to the specified | NULL
+ *                      | partition on the specified     |
+ *                      | channel because of mismatched  |
+ *                      | message sizes                  |
+ * ---------------------+--------------------------------+---------------------
+ * xpcNoMemory          | insufficient memory avaiable   | NULL
+ *                      | to allocate message queue      |
+ * ---------------------+--------------------------------+---------------------
+ * xpcLackOfResources   | lack of resources to create    | NULL
+ *                      | the necessary kthreads to      |
+ *                      | support the channel            |
+ * ---------------------+--------------------------------+---------------------
+ * xpcUnregistering     | this side's user has           | NULL or NA
+ *                      | unregistered by calling        |
+ *                      | xpc_disconnect()               |
+ * ---------------------+--------------------------------+---------------------
+ * xpcOtherUnregistering| the other side's user has      | NULL or NA
+ *                      | unregistered by calling        |
+ *                      | xpc_disconnect()               |
+ * ---------------------+--------------------------------+---------------------
+ * xpcNoHeartbeat       | the other side's XPC is no     | NULL or NA
+ *                      | longer heartbeating            |
+ *                      |                                |
+ * ---------------------+--------------------------------+---------------------
+ * xpcUnloading         | this side's XPC module is      | NULL or NA
+ *                      | being unloaded                 |
+ *                      |                                |
+ * ---------------------+--------------------------------+---------------------
+ * xpcOtherUnloading    | the other side's XPC module is | NULL or NA
+ *                      | is being unloaded              |
+ *                      |                                |
+ * ---------------------+--------------------------------+---------------------
+ * xpcPioReadError      | xp_nofault_PIOR() returned an  | NULL or NA
+ *                      | error while sending an IPI     |
+ *                      |                                |
+ * ---------------------+--------------------------------+---------------------
+ * xpcInvalidAddress    | the address either received or | NULL or NA
+ *                      | sent by the specified partition|
+ *                      | is invalid                     |
+ * ---------------------+--------------------------------+---------------------
+ * xpcBteNotAvailable   | attempt to pull data from the  | NULL or NA
+ * xpcBtePoisonError    | specified partition over the   |
+ * xpcBteWriteError     | specified channel via a        |
+ * xpcBteAccessError    | bte_copy() failed              |
+ * xpcBteTimeOutError   |                                |
+ * xpcBteXtalkError     |                                |
+ * xpcBteDirectoryError |                                |
+ * xpcBteGenericError   |                                |
+ * xpcBteUnmappedError  |                                |
+ * ---------------------+--------------------------------+---------------------
+ * xpcUnknownReason     | the specified channel to the   | NULL or NA
+ *                      | specified partition was        |
+ *                      | unavailable for unknown reasons|
+ * =====================+================================+=====================
+ */
+
+typedef void (*xpc_channel_func)(enum xpc_retval reason, partid_t partid,
+		int ch_number, void *data, void *key);
+
+typedef void (*xpc_notify_func)(enum xpc_retval reason, partid_t partid,
+		int ch_number, void *key);
+
+
+/*
+ * The following is a registration entry. There is a global array of these,
+ * one per channel. It is used to record the connection registration made
+ * by the users of XPC. As long as a registration entry exists, for any
+ * partition that comes up, XPC will attempt to establish a connection on
+ * that channel. Notification that a connection has been made will occur via
+ * the xpc_channel_func function.
+ *
+ * The 'func' field points to the function to call when aynchronous
+ * notification is required for such events as: a connection established/lost,
+ * or an incomming message received, or an error condition encountered. A
+ * non-NULL 'func' field indicates that there is an active registration for
+ * the channel.
+ */
+struct xpc_registration {
+	struct semaphore sema;
+	xpc_channel_func func;		/* function to call */
+	void *key;			/* pointer to user's key */
+	u16 nentries;			/* #of msg entries in local msg queue */
+	u16 msg_size;			/* message queue's message size */
+	u32 assigned_limit;		/* limit on #of assigned kthreads */
+	u32 idle_limit;			/* limit on #of idle kthreads */
+} ____cacheline_aligned;
+
+
+#define XPC_CHANNEL_REGISTERED(_c)	(xpc_registrations[_c].func != NULL)
+
+
+/* the following are valid xpc_allocate() flags */
+#define XPC_WAIT	0		/* wait flag */
+#define XPC_NOWAIT	1		/* no wait flag */
+
+
+struct xpc_interface {
+	void (*connect)(int);
+	void (*disconnect)(int);
+	enum xpc_retval (*allocate)(partid_t, int, u32, void **);
+	enum xpc_retval (*send)(partid_t, int, void *);
+	enum xpc_retval (*send_notify)(partid_t, int, void *,
+						xpc_notify_func, void *);
+	void (*received)(partid_t, int, void *);
+	enum xpc_retval (*partid_to_nasids)(partid_t, void *);
+};
+
+
+extern struct xpc_interface xpc_interface;
+
+extern void xpc_set_interface(void (*)(int),
+		void (*)(int),
+		enum xpc_retval (*)(partid_t, int, u32, void **),
+		enum xpc_retval (*)(partid_t, int, void *),
+		enum xpc_retval (*)(partid_t, int, void *, xpc_notify_func,
+								void *),
+		void (*)(partid_t, int, void *),
+		enum xpc_retval (*)(partid_t, void *));
+extern void xpc_clear_interface(void);
+
+
+extern enum xpc_retval xpc_connect(int, xpc_channel_func, void *, u16,
+						u16, u32, u32);
+extern void xpc_disconnect(int);
+
+static inline enum xpc_retval
+xpc_allocate(partid_t partid, int ch_number, u32 flags, void **payload)
+{
+	return xpc_interface.allocate(partid, ch_number, flags, payload);
+}
+
+static inline enum xpc_retval
+xpc_send(partid_t partid, int ch_number, void *payload)
+{
+	return xpc_interface.send(partid, ch_number, payload);
+}
+
+static inline enum xpc_retval
+xpc_send_notify(partid_t partid, int ch_number, void *payload,
+			xpc_notify_func func, void *key)
+{
+	return xpc_interface.send_notify(partid, ch_number, payload, func, key);
+}
+
+static inline void
+xpc_received(partid_t partid, int ch_number, void *payload)
+{
+	return xpc_interface.received(partid, ch_number, payload);
+}
+
+static inline enum xpc_retval
+xpc_partid_to_nasids(partid_t partid, void *nasids)
+{
+	return xpc_interface.partid_to_nasids(partid, nasids);
+}
+
+
+extern u64 xp_nofault_PIOR_target;
+extern int xp_nofault_PIOR(void *);
+extern int xp_error_PIOR(void);
+
+
+#endif /* _ASM_IA64_SN_XP_H */
+

kernel/exit.c

···
 	for (;;) ;
 }
 
+EXPORT_SYMBOL_GPL(do_exit);
+
 NORET_TYPE void complete_and_exit(struct completion *comp, long code)
 {
 	if (comp)

mm/page_alloc.c

···
  * initializer cleaner
  */
 nodemask_t node_online_map = { { [0] = 1UL } };
+EXPORT_SYMBOL(node_online_map);
 nodemask_t node_possible_map = NODE_MASK_ALL;
+EXPORT_SYMBOL(node_possible_map);
 struct pglist_data *pgdat_list;
 unsigned long totalram_pages;
 unsigned long totalhigh_pages;