Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] Support multiple CPUs going through OS_MCA
[IA64] silence GCC ia64 unused variable warnings
[IA64] prevent MCA when performing MMIO mmap to PCI config space
[IA64] add sn_register_pmi_handler oemcall
[IA64] Stop bit for brl instruction
[IA64] SN: Correct ROM resource length for BIOS copy
[IA64] Don't set psr.ic and psr.i simultaneously

Documentation/ia64/aliasing-test.c

···
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <linux/pci.h>
 
 int sum;
 
···
 		return -1;
 	}
 
+	if (fnmatch("/proc/bus/pci/*", path, 0) == 0) {
+		rc = ioctl(fd, PCIIOC_MMAP_IS_MEM);
+		if (rc == -1)
+			perror("PCIIOC_MMAP_IS_MEM ioctl");
+	}
+
 	addr = mmap(NULL, length, PROT_READ|PROT_WRITE, MAP_SHARED, fd, offset);
 	if (addr == MAP_FAILED)
 		return 1;
 
 	if (touch) {
 		c = (int *) addr;
-		while (c < (int *) (offset + length))
+		while (c < (int *) (addr + length))
 			sum += *c++;
 	}
 
···
 	return 0;
 }
 
-int scan_sysfs(char *path, char *file, off_t offset, size_t length, int touch)
+int scan_tree(char *path, char *file, off_t offset, size_t length, int touch)
 {
 	struct dirent **namelist;
 	char *name, *path2;
···
 		} else {
 			r = lstat(path2, &buf);
 			if (r == 0 && S_ISDIR(buf.st_mode)) {
-				rc = scan_sysfs(path2, file, offset, length, touch);
+				rc = scan_tree(path2, file, offset, length, touch);
 				if (rc < 0)
 					return rc;
 			}
···
 	else
 		fprintf(stderr, "FAIL: /dev/mem 0x0-0x100000 not accessible\n");
 
-	scan_sysfs("/sys/class/pci_bus", "legacy_mem", 0, 0xA0000, 1);
-	scan_sysfs("/sys/class/pci_bus", "legacy_mem", 0xA0000, 0x20000, 0);
-	scan_sysfs("/sys/class/pci_bus", "legacy_mem", 0xC0000, 0x40000, 1);
-	scan_sysfs("/sys/class/pci_bus", "legacy_mem", 0, 1024*1024, 0);
+	scan_tree("/sys/class/pci_bus", "legacy_mem", 0, 0xA0000, 1);
+	scan_tree("/sys/class/pci_bus", "legacy_mem", 0xA0000, 0x20000, 0);
+	scan_tree("/sys/class/pci_bus", "legacy_mem", 0xC0000, 0x40000, 1);
+	scan_tree("/sys/class/pci_bus", "legacy_mem", 0, 1024*1024, 0);
 
 	scan_rom("/sys/devices", "rom");
+
+	scan_tree("/proc/bus/pci", "??.?", 0, 0xA0000, 1);
+	scan_tree("/proc/bus/pci", "??.?", 0xA0000, 0x20000, 0);
+	scan_tree("/proc/bus/pci", "??.?", 0xC0000, 0x40000, 1);
+	scan_tree("/proc/bus/pci", "??.?", 0, 1024*1024, 0);
 }

Documentation/ia64/aliasing.txt

···
 
 	The /dev/mem mmap constraints apply.
 
+    mmap of /proc/bus/pci/.../??.?
+
+    	This is an MMIO mmap of PCI functions, which additionally may or
+	may not be requested as using the WC attribute.
+
+	If WC is requested, and the region in kern_memmap is either WC
+	or UC, and the EFI memory map designates the region as WC, then
+	the WC mapping is allowed.
+
+	Otherwise, the user mapping must use the same attribute as the
+	kernel mapping.
+
     read/write of /dev/mem
 
 	This uses copy_from_user(), which implicitly uses a kernel

arch/ia64/kernel/gate.S

···
 	.previous
 #define BRL_COND_FSYS_BUBBLE_DOWN(pr)			\
 [1:](pr)brl.cond.sptk 0;				\
+	;;						\
 	.xdata4 ".data.patch.brl_fsys_bubble_down", 1b-.
 
 GLOBAL_ENTRY(__kernel_syscall_via_break)

arch/ia64/kernel/mca.c

···
  *
  * 2006-09-15 Hidetoshi Seto <[e-mail]>
  * 	      Add printing support for MCA/INIT.
+ *
+ * 2007-04-27 Russ Anderson <[e-mail]>
+ *	      Support multiple cpus going through OS_MCA in the same event.
  */
 #include <linux/types.h>
 #include <linux/init.h>
···
 #endif
 
 /* Used by mca_asm.S */
-u32				ia64_mca_serialize;
 DEFINE_PER_CPU(u64, ia64_mca_data); /* == __per_cpu_mca[smp_processor_id()] */
 DEFINE_PER_CPU(u64, ia64_mca_per_cpu_pte); /* PTE to map per-CPU area */
 DEFINE_PER_CPU(u64, ia64_mca_pal_pte);	    /* PTE to map PAL code */
···
 		goto no_mod;
 	}
 
+	if (r13 != sos->prev_IA64_KR_CURRENT) {
+		msg = "inconsistent previous current and r13";
+		goto no_mod;
+	}
+
 	if (!mca_recover_range(ms->pmsa_iip)) {
-		if (r13 != sos->prev_IA64_KR_CURRENT) {
-			msg = "inconsistent previous current and r13";
-			goto no_mod;
-		}
 		if ((r12 - r13) >= KERNEL_STACK_SIZE) {
 			msg = "inconsistent r12 and r13";
 			goto no_mod;
···
  *	further MCA logging is enabled by clearing logs.
  *	Monarch also has the duty of sending wakeup-IPIs to pull the
  *	slave processors out of rendezvous spinloop.
+ *
+ *	If multiple processors call into OS_MCA, the first will become
+ *	the monarch.  Subsequent cpus will be recorded in the mca_cpu
+ *	bitmask.  After the first monarch has processed its MCA, it
+ *	will wake up the next cpu in the mca_cpu bitmask and then go
+ *	into the rendezvous loop.  When all processors have serviced
+ *	their MCA, the last monarch frees up the rest of the processors.
  */
 void
 ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
···
 	struct task_struct *previous_current;
 	struct ia64_mca_notify_die nd =
 		{ .sos = sos, .monarch_cpu = &monarch_cpu };
+	static atomic_t mca_count;
+	static cpumask_t mca_cpu;
 
+	if (atomic_add_return(1, &mca_count) == 1) {
+		monarch_cpu = cpu;
+		sos->monarch = 1;
+	} else {
+		cpu_set(cpu, mca_cpu);
+		sos->monarch = 0;
+	}
 	mprintk(KERN_INFO "Entered OS MCA handler. PSP=%lx cpu=%d "
 		"monarch=%ld\n", sos->proc_state_param, cpu, sos->monarch);
 
 	previous_current = ia64_mca_modify_original_stack(regs, sw, sos, "MCA");
-	monarch_cpu = cpu;
+
 	if (notify_die(DIE_MCA_MONARCH_ENTER, "MCA", regs, (long)&nd, 0, 0)
 			== NOTIFY_STOP)
 		ia64_mca_spin(__FUNCTION__);
-	ia64_wait_for_slaves(cpu, "MCA");
+	if (sos->monarch) {
+		ia64_wait_for_slaves(cpu, "MCA");
+	} else {
+		ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA;
+		while (cpu_isset(cpu, mca_cpu))
+			cpu_relax();	/* spin until monarch wakes us */
+		ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
+        }
 
 	/* Wakeup all the processors which are spinning in the rendezvous loop.
 	 * They will leave SAL, then spin in the OS with interrupts disabled
···
 			== NOTIFY_STOP)
 		ia64_mca_spin(__FUNCTION__);
 
+
+	if (atomic_dec_return(&mca_count) > 0) {
+		int i;
+
+		/* wake up the next monarch cpu,
+		 * and put this cpu in the rendez loop.
+		 */
+		ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA;
+		for_each_online_cpu(i) {
+			if (cpu_isset(i, mca_cpu)) {
+				monarch_cpu = i;
+				cpu_clear(i, mca_cpu);	/* wake next cpu */
+				while (monarch_cpu != -1)
+					cpu_relax();	/* spin until last cpu leaves */
+				ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
+				set_curr_task(cpu, previous_current);
+				return;
+			}
+		}
+	}
 	set_curr_task(cpu, previous_current);
 	monarch_cpu = -1;
 }

arch/ia64/kernel/mca_asm.S

···
 //StartMain////////////////////////////////////////////////////////////////////
 
 ia64_os_mca_dispatch:
-	// Serialize all MCA processing
-	mov	r3=1;;
-	LOAD_PHYSICAL(p0,r2,ia64_mca_serialize);;
-ia64_os_mca_spin:
-	xchg4	r4=[r2],r3;;
-	cmp.ne	p6,p0=r4,r0
-(p6)	br ia64_os_mca_spin
-
 	mov r3=IA64_MCA_CPU_MCA_STACK_OFFSET	// use the MCA stack
 	LOAD_PHYSICAL(p0,r2,1f)			// return address
 	mov r19=1				// All MCA events are treated as monarch (for now)
···
 1:
 
 	mov		b0=r12			// SAL_CHECK return address
-
-	// release lock
-	LOAD_PHYSICAL(p0,r3,ia64_mca_serialize);;
-	st4.rel		[r3]=r0
 
 	br		b0
 

arch/ia64/kernel/mca_drv_asm.S

···
 	mov	b6=loc1
 	;;
 	mov	loc1=rp
-	ssm	psr.i | psr.ic
+	ssm	psr.ic
+	;;
+	srlz.i
+	;;
+	ssm	psr.i
 	br.call.sptk.many rp=b6		// does not return ...
 	;;
 	mov	ar.pfs=loc0

arch/ia64/kernel/process.c

···
 static void
 do_copy_task_regs (struct task_struct *task, struct unw_frame_info *info, void *arg)
 {
-	unsigned long mask, sp, nat_bits = 0, ip, ar_rnat, urbs_end, cfm;
+	unsigned long mask, sp, nat_bits = 0, ar_rnat, urbs_end, cfm;
+	unsigned long uninitialized_var(ip);	/* GCC be quiet */
 	elf_greg_t *dst = arg;
 	struct pt_regs *pt;
 	char nat;

arch/ia64/mm/tlb.c

···
 void __devinit
 ia64_tlb_init (void)
 {
-	ia64_ptce_info_t ptce_info;
+	ia64_ptce_info_t uninitialized_var(ptce_info); /* GCC be quiet */
 	unsigned long tr_pgbits;
 	long status;
 

arch/ia64/pci/pci.c

···
 pci_mmap_page_range (struct pci_dev *dev, struct vm_area_struct *vma,
 		     enum pci_mmap_state mmap_state, int write_combine)
 {
+	unsigned long size = vma->vm_end - vma->vm_start;
+	pgprot_t prot;
+
 	/*
 	 * I/O space cannot be accessed via normal processor loads and
 	 * stores on this platform.
···
 		 */
 		return -EINVAL;
 
+	if (!valid_mmap_phys_addr_range(vma->vm_pgoff, size))
+		return -EINVAL;
+
+	prot = phys_mem_access_prot(NULL, vma->vm_pgoff, size,
+				    vma->vm_page_prot);
+
 	/*
-	 * Leave vm_pgoff as-is, the PCI space address is the physical
-	 * address on this platform.
+	 * If the user requested WC, the kernel uses UC or WC for this region,
+	 * and the chipset supports WC, we can use WC. Otherwise, we have to
+	 * use the same attribute the kernel uses.
 	 */
-	if (write_combine && efi_range_is_wc(vma->vm_start,
-					     vma->vm_end - vma->vm_start))
+	if (write_combine &&
+	    ((pgprot_val(prot) & _PAGE_MA_MASK) == _PAGE_MA_UC ||
+	     (pgprot_val(prot) & _PAGE_MA_MASK) == _PAGE_MA_WC) &&
+	    efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start))
 		vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
 	else
-		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+		vma->vm_page_prot = prot;
 
 	if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
 			     vma->vm_end - vma->vm_start, vma->vm_page_prot))

arch/ia64/sn/kernel/io_acpi_init.c

···
 	void __iomem *addr;
 	struct pcidev_info *pcidev_info = NULL;
 	struct sn_irq_info *sn_irq_info = NULL;
-	size_t size;
+	size_t image_size, size;
 
 	if (sn_acpi_get_pcidev_info(dev, &pcidev_info, &sn_irq_info)) {
 		panic("%s:  Failure obtaining pcidev_info for %s\n",
···
 	if (pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE]) {
 		/*
 		 * A valid ROM image exists and has been shadowed by the
-		 * PROM. Setup the pci_dev ROM resource to point to
-		 * the shadowed copy.
+		 * PROM. Setup the pci_dev ROM resource with the address
+		 * of the shadowed copy, and the actual length of the ROM image.
 		 */
-		size = dev->resource[PCI_ROM_RESOURCE].end -
-				dev->resource[PCI_ROM_RESOURCE].start;
-		addr =
-		     ioremap(pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE],
-			     size);
+		size = pci_resource_len(dev, PCI_ROM_RESOURCE);
+		addr = ioremap(pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE],
+			       size);
+		image_size = pci_get_rom_size(addr, size);
 		dev->resource[PCI_ROM_RESOURCE].start = (unsigned long) addr;
 		dev->resource[PCI_ROM_RESOURCE].end =
-						(unsigned long) addr + size;
+					(unsigned long) addr + image_size - 1;
 		dev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_BIOS_COPY;
 	}
 	sn_pci_fixup_slot(dev, pcidev_info, sn_irq_info);

arch/ia64/sn/kernel/io_init.c

···
 			insert_resource(&ioport_resource, &dev->resource[idx]);
 		else
 			insert_resource(&iomem_resource, &dev->resource[idx]);
-		/* If ROM, mark as shadowed in PROM */
-		if (idx == PCI_ROM_RESOURCE)
-			dev->resource[idx].flags |= IORESOURCE_ROM_BIOS_COPY;
+		/*
+		 * If ROM, set the actual ROM image size, and mark as
+		 * shadowed in PROM.
+		 */
+		if (idx == PCI_ROM_RESOURCE) {
+			size_t image_size;
+			void __iomem *rom;
+
+			rom = ioremap(pci_resource_start(dev, PCI_ROM_RESOURCE),
+				      size + 1);
+			image_size = pci_get_rom_size(rom, size + 1);
+			dev->resource[PCI_ROM_RESOURCE].end =
+				dev->resource[PCI_ROM_RESOURCE].start +
+				image_size - 1;
+			dev->resource[PCI_ROM_RESOURCE].flags |=
+						 IORESOURCE_ROM_BIOS_COPY;
+		}
 	}
 	/* Create a pci_window in the pci_controller struct for
 	 * each device resource.

arch/ia64/sn/kernel/tiocx.c

···
 
 static int is_fpga_tio(int nasid, int *bt)
 {
-	u16 ioboard_type;
+	u16 uninitialized_var(ioboard_type);	/* GCC be quiet */
 	s64 rc;
 
 	rc = ia64_sn_sysctl_ioboard_get(nasid, &ioboard_type);

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

···
 u16 sn_ioboard_to_pci_bus(struct pci_bus *pci_bus)
 {
 	s64 rc;
-	u16 ioboard;
+	u16 uninitialized_var(ioboard);		/* GCC be quiet */
 	nasid_t nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
 
 	rc = ia64_sn_sysctl_ioboard_get(nasid, &ioboard);

drivers/pci/rom.c

···
 }
 
 /**
+ * pci_get_rom_size - obtain the actual size of the ROM image
+ * @rom: kernel virtual pointer to image of ROM
+ * @size: size of PCI window
+ *  return: size of actual ROM image
+ *
+ * Determine the actual length of the ROM image.
+ * The PCI window size could be much larger than the
+ * actual image size.
+ */
+size_t pci_get_rom_size(void __iomem *rom, size_t size)
+{
+	void __iomem *image;
+	int last_image;
+
+	image = rom;
+	do {
+		void __iomem *pds;
+		/* Standard PCI ROMs start out with these bytes 55 AA */
+		if (readb(image) != 0x55)
+			break;
+		if (readb(image + 1) != 0xAA)
+			break;
+		/* get the PCI data structure and check its signature */
+		pds = image + readw(image + 24);
+		if (readb(pds) != 'P')
+			break;
+		if (readb(pds + 1) != 'C')
+			break;
+		if (readb(pds + 2) != 'I')
+			break;
+		if (readb(pds + 3) != 'R')
+			break;
+		last_image = readb(pds + 21) & 0x80;
+		/* this length is reliable */
+		image += readw(pds + 16) * 512;
+	} while (!last_image);
+
+	/* never return a size larger than the PCI resource window */
+	/* there are known ROMs that get the size wrong */
+	return min((size_t)(image - rom), size);
+}
+
+/**
  * pci_map_rom - map a PCI ROM to kernel space
  * @pdev: pointer to pci device struct
  * @size: pointer to receive size of pci window over ROM
···
 	struct resource *res = &pdev->resource[PCI_ROM_RESOURCE];
 	loff_t start;
 	void __iomem *rom;
-	void __iomem *image;
-	int last_image;
 
 	/*
 	 * IORESOURCE_ROM_SHADOW set on x86, x86_64 and IA64 supports legacy
···
 	 * size is much larger than the actual size of the ROM.
 	 * True size is important if the ROM is going to be copied.
 	 */
-	image = rom;
-	do {
-		void __iomem *pds;
-		/* Standard PCI ROMs start out with these bytes 55 AA */
-		if (readb(image) != 0x55)
-			break;
-		if (readb(image + 1) != 0xAA)
-			break;
-		/* get the PCI data structure and check its signature */
-		pds = image + readw(image + 24);
-		if (readb(pds) != 'P')
-			break;
-		if (readb(pds + 1) != 'C')
-			break;
-		if (readb(pds + 2) != 'I')
-			break;
-		if (readb(pds + 3) != 'R')
-			break;
-		last_image = readb(pds + 21) & 0x80;
-		/* this length is reliable */
-		image += readw(pds + 16) * 512;
-	} while (!last_image);
-
-	/* never return a size larger than the PCI resource window */
-	/* there are known ROMs that get the size wrong */
-	*size = min((size_t)(image - rom), *size);
-
+	*size = pci_get_rom_size(rom, *size);
 	return rom;
 }
 

include/asm-ia64/mca.h

···
 	IA64_MCA_RENDEZ_CHECKIN_NOTDONE	=	0x0,
 	IA64_MCA_RENDEZ_CHECKIN_DONE	=	0x1,
 	IA64_MCA_RENDEZ_CHECKIN_INIT	=	0x2,
+	IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA	=	0x3,
 };
 
 /* Information maintained by the MC infrastructure */

include/asm-ia64/sn/sn_sal.h

···
 #define  SN_SAL_NO_FAULT_ZONE_VIRTUAL		   0x02000010
 #define  SN_SAL_NO_FAULT_ZONE_PHYSICAL		   0x02000011
 #define  SN_SAL_PRINT_ERROR			   0x02000012
+#define  SN_SAL_REGISTER_PMI_HANDLER		   0x02000014
 #define  SN_SAL_SET_ERROR_HANDLING_FEATURES	   0x0200001a	// reentrant
 #define  SN_SAL_GET_FIT_COMPT			   0x0200001b	// reentrant
 #define  SN_SAL_GET_SAPIC_INFO                     0x0200001d
···
 	}
 	ia64_sal_oemcall(&ret_stuff, call, start_addr, end_addr, return_addr,
 			 (u64)1, 0, 0, 0);
+	return ret_stuff.status;
+}
+
+/*
+ * Register or unregister a function to handle a PMI received by a CPU.
+ * Before calling the registered handler, SAL sets r1 to the value that
+ * was passed in as the global_pointer.
+ *
+ * If the handler pointer is NULL, then the currently registered handler
+ * will be unregistered.
+ *
+ * Returns 0 on success, or a negative value if an error occurred.
+ */
+static inline int
+sn_register_pmi_handler(u64 handler, u64 global_pointer)
+{
+	struct ia64_sal_retval ret_stuff;
+	ia64_sal_oemcall(&ret_stuff, SN_SAL_REGISTER_PMI_HANDLER, handler,
+			 global_pointer, 0, 0, 0, 0, 0);
 	return ret_stuff.status;
 }
 

include/linux/pci.h

···
 void __iomem __must_check *pci_map_rom_copy(struct pci_dev *pdev, size_t *size);
 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
 void pci_remove_rom(struct pci_dev *pdev);
+size_t pci_get_rom_size(void __iomem *rom, size_t size);
 
 /* Power management related routines */
 int pci_save_state(struct pci_dev *dev);