Merge tag 'mips_5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS changes from Paul Burton:
"Nothing too big or scary in here:

- Support mremap() for the VDSO, primarily to allow CRIU to restore
the VDSO to its checkpointed location.

- Restore the MIPS32 cBPF JIT, after having reverted the enablement
of the eBPF JIT for MIPS32 systems in the 5.5 cycle.

- Improve cop0 counter synchronization behaviour whilst onlining CPUs
by running with interrupts disabled.

- Better match FPU behaviour when emulating multiply-accumulate
instructions on pre-r6 systems that implement IEEE754-2008 style
MACs.

- Loongson64 kernels now build using the MIPS64r2 ISA, allowing them
to take advantage of instructions introduced by r2.

- Support for the Ingenic X1000 SoC & the really nice little CU Neo
development board that's using it.

- Support for WMAC on GARDENA Smart Gateway devices.

- Lots of cleanup & refactoring of SGI IP27 (Origin 2*) support in
preparation for introducing IP35 (Origin 3*) support.

- Various Kconfig & Makefile cleanups"

* tag 'mips_5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (60 commits)
MIPS: PCI: Add detection of IOC3 on IO7, IO8, IO9 and Fuel
MIPS: Loongson64: Disable exec hazard
MIPS: Loongson64: Bump ISA level to MIPSR2
MIPS: Make DIEI support as a config option
MIPS: OCTEON: octeon-irq: fix spelling mistake "to" -> "too"
MIPS: asm: local: add barriers for Loongson
MIPS: Loongson64: Select mac2008 only feature
MIPS: Add MAC2008 Support
Revert "MIPS: Add custom serial.h with BASE_BAUD override for generic kernel"
MIPS: sort MIPS and MIPS_GENERIC Kconfig selects alphabetically (again)
MIPS: make CPU_HAS_LOAD_STORE_LR opt-out
MIPS: generic: don't unconditionally select PINCTRL
MIPS: don't explicitly select LIBFDT in Kconfig
MIPS: sync-r4k: do slave counter synchronization with disabled HW interrupts
MIPS: SGI-IP30: Check for valid pointer before using it
MIPS: syscalls: fix indentation of the 'SYSNR' message
MIPS: boot: fix typo in 'vmlinux.lzma.its' target
MIPS: fix indentation of the 'RELOCS' message
dt-bindings: Document loongson vendor-prefix
MIPS: CU1000-Neo: Refresh defconfig to support HWMON and WiFi.
...

Documentation/devicetree/bindings/mips/ingenic/devices.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mips/ingenic/devices.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Ingenic XBurst based Platforms Device Tree Bindings
+
+maintainers:
+  - 周琰杰 (Zhou Yanjie) <[e-mail]>
+description: |
+  Devices with a Ingenic XBurst CPU shall have the following properties.
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+
+      - description: Qi Hardware Ben NanoNote
+        items:
+          - const: qi,lb60
+
+      - description: Game Consoles Worldwide GCW Zero
+        items:
+          - const: gcw,zero
+
+      - description: MIPS Creator CI20
+        items:
+          - const: img,ci20
+
+      - description: YSH & ATIL General Board CU Neo
+        items:
+          - const: yna,cu1000-neo
+...

Documentation/devicetree/bindings/vendor-prefixes.yaml

···
     description: Logic PD, Inc.
   "^longcheer,.*":
     description: Longcheer Technology (Shanghai) Co., Ltd.
+  "^loongson,.*":
+    description: Loongson Technology Corporation Limited
   "^lsi,.*":
     description: LSI Corp. (LSI Logic)
   "^lwn,.*":
···
     description: Shenzhen Xunlong Software CO.,Limited
   "^xylon,.*":
     description: Xylon
+  "^yna,.*":
+    description: YSH & ATIL
   "^yones-toptech,.*":
     description: Yones Toptech Co., Ltd.
   "^ysoft,.*":

MAINTAINERS

···
 MIPS
 M:	Ralf Baechle <[e-mail]>
 M:	Paul Burton <[e-mail]>
-M:	James Hogan <[e-mail]>
 L:	[e-mail]
 W:	http://www.linux-mips.org/
 T:	git git://git.linux-mips.org/pub/scm/ralf/linux.git

arch/mips/Kconfig

···
 	select ARCH_32BIT_OFF_T if !64BIT
 	select ARCH_BINFMT_ELF_STATE if MIPS_FP_SUPPORT
 	select ARCH_CLOCKSOURCE_DATA
+	select ARCH_HAS_FORTIFY_SOURCE
+	select ARCH_HAS_KCOV
+	select ARCH_HAS_PTE_SPECIAL if !(32BIT && CPU_HAS_RIXI)
 	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 	select ARCH_HAS_UBSAN_SANITIZE_ALL
-	select ARCH_HAS_FORTIFY_SOURCE
 	select ARCH_SUPPORTS_UPROBES
 	select ARCH_USE_BUILTIN_BSWAP
 	select ARCH_USE_CMPXCHG_LOCKREF if 64BIT
···
 	select HAVE_ARCH_TRACEHOOK
 	select HAVE_ARCH_TRANSPARENT_HUGEPAGE if CPU_SUPPORTS_HUGEPAGES
 	select HAVE_ASM_MODVERSIONS
-	select HAVE_EBPF_JIT if 64BIT && !CPU_MICROMIPS && TARGET_ISA_REV >= 2
+	select HAVE_CBPF_JIT if !64BIT && !CPU_MICROMIPS
 	select HAVE_CONTEXT_TRACKING
 	select HAVE_COPY_THREAD_TLS
 	select HAVE_C_RECORDMCOUNT
···
 	select HAVE_DEBUG_STACKOVERFLOW
 	select HAVE_DMA_CONTIGUOUS
 	select HAVE_DYNAMIC_FTRACE
+	select HAVE_EBPF_JIT if 64BIT && !CPU_MICROMIPS && TARGET_ISA_REV >= 2
 	select HAVE_EXIT_THREAD
 	select HAVE_FAST_GUP
 	select HAVE_FTRACE_MCOUNT_RECORD
 	select HAVE_FUNCTION_GRAPH_TRACER
 	select HAVE_FUNCTION_TRACER
+	select HAVE_GCC_PLUGINS
+	select HAVE_GENERIC_VDSO
 	select HAVE_IDE
 	select HAVE_IOREMAP_PROT
 	select HAVE_IRQ_EXIT_ON_IRQ_STACK
···
 	select HAVE_STACKPROTECTOR
 	select HAVE_SYSCALL_TRACEPOINTS
 	select HAVE_VIRT_CPU_ACCOUNTING_GEN if 64BIT || !SMP
-	select HAVE_GENERIC_VDSO
 	select IRQ_FORCED_THREADING
 	select ISA if EISA
-	select MODULES_USE_ELF_RELA if MODULES && 64BIT
 	select MODULES_USE_ELF_REL if MODULES
+	select MODULES_USE_ELF_RELA if MODULES && 64BIT
 	select PERF_USE_VMALLOC
 	select RTC_LIB
 	select SYSCTL_EXCEPTION_TRACE
 	select VIRT_TO_BUS
-	select ARCH_HAS_PTE_SPECIAL if !(32BIT && CPU_HAS_RIXI)
-	select ARCH_HAS_KCOV
-	select HAVE_GCC_PLUGINS
 
 menu "Machine selection"
 
···
 	select CEVT_R4K
 	select CLKSRC_MIPS_GIC
 	select COMMON_CLK
-	select CPU_MIPSR2_IRQ_VI
 	select CPU_MIPSR2_IRQ_EI
+	select CPU_MIPSR2_IRQ_VI
 	select CSRC_R4K
 	select DMA_PERDEV_COHERENT
 	select HAVE_PCI
 	select IRQ_MIPS_CPU
-	select LIBFDT
 	select MIPS_AUTO_PFN_OFFSET
 	select MIPS_CPU_SCACHE
 	select MIPS_GIC
 	select MIPS_L1_CACHE_SHIFT_7
 	select NO_EXCEPT_FILL
 	select PCI_DRIVERS_GENERIC
-	select PINCTRL
 	select SMP_UP if SMP
 	select SWAP_IO_SPACE
 	select SYS_HAS_CPU_MIPS32_R1
···
 	select SYS_SUPPORTS_HIGHMEM
 	select SYS_SUPPORTS_LITTLE_ENDIAN
 	select SYS_SUPPORTS_MICROMIPS
-	select SYS_SUPPORTS_MIPS_CPS
 	select SYS_SUPPORTS_MIPS16
+	select SYS_SUPPORTS_MIPS_CPS
 	select SYS_SUPPORTS_MULTITHREADING
 	select SYS_SUPPORTS_RELOCATABLE
 	select SYS_SUPPORTS_SMARTMIPS
+	select UHI_BOOT
 	select USB_EHCI_BIG_ENDIAN_DESC if CPU_BIG_ENDIAN
 	select USB_EHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
 	select USB_OHCI_BIG_ENDIAN_DESC if CPU_BIG_ENDIAN
···
 	select USB_UHCI_BIG_ENDIAN_DESC if CPU_BIG_ENDIAN
 	select USB_UHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
 	select USE_OF
-	select UHI_BOOT
 	help
 	  Select this to build a kernel which aims to support multiple boards,
 	  generally using a flattened device tree passed from the bootloader
···
 	select GENERIC_IRQ_CHIP
 	select BUILTIN_DTB if MIPS_NO_APPENDED_DTB
 	select USE_OF
-	select LIBFDT
 
 config LANTIQ
 	bool "Lantiq based platforms"
···
 	select DMA_NONCOHERENT
 	select GPIOLIB
 	select IRQ_MIPS_CPU
-	select LIBFDT
 	select MFD_SYSCON
 	select MIPS_CPU_SCACHE
 	select MIPS_GIC
···
 	select I8253
 	select I8259
 	select IRQ_MIPS_CPU
-	select LIBFDT
 	select MIPS_BONITO64
 	select MIPS_CPU_SCACHE
 	select MIPS_GIC
···
 	select ZONE_DMA32
 	select HOLES_IN_ZONE
 	select GPIOLIB
-	select LIBFDT
 	select USE_OF
 	select ARCH_SPARSEMEM_ENABLE
 	select SYS_SUPPORTS_SMP
···
 	def_bool n
 
 config GENERIC_CSUM
-	bool
-	default y if !CPU_HAS_LOAD_STORE_LR
+	def_bool CPU_NO_LOAD_STORE_LR
 
 config GENERIC_ISA_DMA
 	bool
···
 	bool "Loongson 64-bit CPU"
 	depends on SYS_HAS_CPU_LOONGSON64
 	select ARCH_HAS_PHYS_TO_DMA
+	select CPU_MIPSR2
+	select CPU_HAS_PREFETCH
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_HUGEPAGES
 	select CPU_SUPPORTS_MSA
-	select CPU_HAS_LOAD_STORE_LR
+	select CPU_DIEI_BROKEN if !LOONGSON3_ENHANCEMENT
+	select CPU_MIPSR2_IRQ_VI
 	select WEAK_ORDERING
 	select WEAK_REORDERING_BEYOND_LLSC
 	select MIPS_ASID_BITS_VARIABLE
···
 config LOONGSON3_ENHANCEMENT
 	bool "New Loongson-3 CPU Enhancements"
 	default n
-	select CPU_MIPSR2
-	select CPU_HAS_PREFETCH
 	depends on CPU_LOONGSON64
 	help
 	  New Loongson-3 cores (since Loongson-3A R2, as opposed to Loongson-3A
···
 	bool "MIPS32 Release 1"
 	depends on SYS_HAS_CPU_MIPS32_R1
 	select CPU_HAS_PREFETCH
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 	help
···
 	bool "MIPS32 Release 2"
 	depends on SYS_HAS_CPU_MIPS32_R2
 	select CPU_HAS_PREFETCH
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_MSA
···
 	bool "MIPS32 Release 6"
 	depends on SYS_HAS_CPU_MIPS32_R6
 	select CPU_HAS_PREFETCH
+	select CPU_NO_LOAD_STORE_LR
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_MSA
···
 	bool "MIPS64 Release 1"
 	depends on SYS_HAS_CPU_MIPS64_R1
 	select CPU_HAS_PREFETCH
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
···
 	bool "MIPS64 Release 2"
 	depends on SYS_HAS_CPU_MIPS64_R2
 	select CPU_HAS_PREFETCH
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
···
 	bool "MIPS64 Release 6"
 	depends on SYS_HAS_CPU_MIPS64_R6
 	select CPU_HAS_PREFETCH
+	select CPU_NO_LOAD_STORE_LR
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
···
 	bool "R3000"
 	depends on SYS_HAS_CPU_R3000
 	select CPU_HAS_WB
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_R3K_TLB
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
···
 	bool "R39XX"
 	depends on SYS_HAS_CPU_TX39XX
 	select CPU_SUPPORTS_32BIT_KERNEL
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_R3K_TLB
 
 config CPU_VR41XX
···
 	depends on SYS_HAS_CPU_VR41XX
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
-	select CPU_HAS_LOAD_STORE_LR
 	help
 	  The options selects support for the NEC VR4100 series of processors.
 	  Only choose this option if you have one of these processors as a
···
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HUGEPAGES
-	select CPU_HAS_LOAD_STORE_LR
 	help
 	  MIPS Technologies R4000-series processors other than 4300, including
 	  the R4000, R4400, R4600, and 4700.
···
 	bool "R49XX"
 	depends on SYS_HAS_CPU_TX49XX
 	select CPU_HAS_PREFETCH
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HUGEPAGES
···
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HUGEPAGES
-	select CPU_HAS_LOAD_STORE_LR
 	help
 	  MIPS Technologies R5000-series processors other than the Nevada.
 
···
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HUGEPAGES
-	select CPU_HAS_LOAD_STORE_LR
 	help
 	  NEC VR5500 and VR5500A series processors implement 64-bit MIPS IV
 	  instruction set.
···
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HUGEPAGES
-	select CPU_HAS_LOAD_STORE_LR
 	help
 	  QED / PMC-Sierra RM52xx-series ("Nevada") processors.
 
···
 	bool "R10000"
 	depends on SYS_HAS_CPU_R10000
 	select CPU_HAS_PREFETCH
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
···
 	bool "RM7000"
 	depends on SYS_HAS_CPU_RM7000
 	select CPU_HAS_PREFETCH
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
···
 config CPU_SB1
 	bool "SB1"
 	depends on SYS_HAS_CPU_SB1
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
···
 	bool "Cavium Octeon processor"
 	depends on SYS_HAS_CPU_CAVIUM_OCTEON
 	select CPU_HAS_PREFETCH
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select WEAK_ORDERING
 	select CPU_SUPPORTS_HIGHMEM
···
 	select WEAK_ORDERING
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_HAS_PREFETCH
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_CPUFREQ
 	select MIPS_EXTERNAL_TIMER
 	help
···
 config CPU_XLR
 	bool "Netlogic XLR SoC"
 	depends on SYS_HAS_CPU_XLR
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
···
 	select WEAK_ORDERING
 	select WEAK_REORDERING_BEYOND_LLSC
 	select CPU_HAS_PREFETCH
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_MIPSR2
 	select CPU_SUPPORTS_HUGEPAGES
 	select MIPS_ASID_BITS_VARIABLE
···
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_HUGEPAGES
 	select ARCH_HAS_PHYS_TO_DMA
-	select CPU_HAS_LOAD_STORE_LR
 
 config CPU_LOONGSON32
 	bool
 	select CPU_MIPS32
 	select CPU_MIPSR2
 	select CPU_HAS_PREFETCH
-	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_CPUFREQ
···
 	bool
 	default y if CPU_MIPS32_R2 || CPU_MIPS64_R2 || CPU_CAVIUM_OCTEON
 	select CPU_HAS_RIXI
+	select CPU_HAS_DIEI if !CPU_DIEI_BROKEN
 	select MIPS_SPRAM
 
 config CPU_MIPSR6
 	bool
 	default y if CPU_MIPS32_R6 || CPU_MIPS64_R6
 	select CPU_HAS_RIXI
+	select CPU_HAS_DIEI if !CPU_DIEI_BROKEN
 	select HAVE_ARCH_BITREVERSE
 	select MIPS_ASID_BITS_VARIABLE
 	select MIPS_CRC_SUPPORT
···
 config XKS01
 	bool
 
+config CPU_HAS_DIEI
+	depends on !CPU_DIEI_BROKEN
+	bool
+
+config CPU_DIEI_BROKEN
+	bool
+
 config CPU_HAS_RIXI
 	bool
 
-config CPU_HAS_LOAD_STORE_LR
+config CPU_NO_LOAD_STORE_LR
 	bool
 	help
-	  CPU has support for unaligned load and store instructions:
+	  CPU lacks support for unaligned load and store instructions:
 	  LWL, LWR, SWL, SWR (Load/store word left/right).
-	  LDL, LDR, SDL, SDR (Load/store doubleword left/right, for 64bit systems).
+	  LDL, LDR, SDL, SDR (Load/store doubleword left/right, for 64bit
+	  systems).
 
 #
 # Vectored interrupt mode is an R2 feature
···
 
 config SYS_SUPPORTS_NUMA
 	bool
+
+config HAVE_SETUP_PER_CPU_AREA
+	def_bool y
+	depends on NUMA
+
+config NEED_PER_CPU_EMBED_FIRST_CHUNK
+	def_bool y
+	depends on NUMA
 
 config RELOCATABLE
 	bool "Relocatable kernel"

arch/mips/Makefile.postlink

···
       cmd_ls3_llsc = $(CMD_LS3_LLSC) $@
 
 CMD_RELOCS = arch/mips/boot/tools/relocs
-quiet_cmd_relocs = RELOCS $@
+quiet_cmd_relocs = RELOCS  $@
       cmd_relocs = $(CMD_RELOCS) $@
 
 # `@true` prevents complaint when there is nothing to be done

arch/mips/boot/Makefile

···
 targets += vmlinux.its
 targets += vmlinux.gz.its
 targets += vmlinux.bz2.its
-targets += vmlinux.lzmo.its
+targets += vmlinux.lzma.its
 targets += vmlinux.lzo.its
 
 quiet_cmd_cpp_its_S = ITS     $@

arch/mips/boot/dts/ingenic/Makefile

···
 dtb-$(CONFIG_JZ4740_QI_LB60)	+= qi_lb60.dtb
 dtb-$(CONFIG_JZ4770_GCW0)	+= gcw0.dtb
 dtb-$(CONFIG_JZ4780_CI20)	+= ci20.dtb
+dtb-$(CONFIG_X1000_CU1000_NEO)	+= cu1000-neo.dtb
 
 obj-$(CONFIG_BUILTIN_DTB)	+= $(addsuffix .o, $(dtb-y))

arch/mips/boot/dts/ingenic/cu1000-neo.dts

···
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+#include "x1000.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/clock/ingenic,tcu.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+	compatible = "yna,cu1000-neo", "ingenic,x1000";
+	model = "YSH & ATIL General Board CU Neo";
+
+	aliases {
+		serial2 = &uart2;
+	};
+
+	chosen {
+		stdout-path = "serial2:115200n8";
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x0 0x04000000>;
+	};
+
+	wlan_pwrseq: msc1-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+
+		clocks = <&lpoclk>;
+		clock-names = "ext_clock";
+
+		reset-gpios = <&gpc 17 GPIO_ACTIVE_LOW>;
+		post-power-on-delay-ms = <200>;
+
+		lpoclk: ap6212a {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+};
+
+&exclk {
+	clock-frequency = <24000000>;
+};
+
+&tcu {
+	/* 1500 kHz for the system timer and clocksource */
+	assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER2>;
+	assigned-clock-rates = <1500000>, <1500000>;
+
+	/* Use channel #0 for the system timer channel #2 for the clocksource */
+	ingenic,pwm-channels-mask = <0xfa>;
+};
+
+&i2c0 {
+	status = "okay";
+
+	clock-frequency = <400000>;
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pins_i2c0>;
+
+	ads7830@48 {
+		compatible = "ti,ads7830";
+		reg = <0x48>;
+	};
+};
+
+&uart2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pins_uart2>;
+
+	status = "okay";
+};
+
+&mac {
+	phy-mode = "rmii";
+	phy-handle = <&lan8720a>;
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pins_mac>;
+
+	snps,reset-gpio = <&gpc 23 GPIO_ACTIVE_LOW>; /* PC23 */
+	snps,reset-active-low;
+	snps,reset-delays-us = <0 10000 30000>;
+
+	status = "okay";
+};
+
+&mdio {
+	status = "okay";
+
+	lan8720a: ethernet-phy@0 {
+		compatible = "ethernet-phy-id0007.c0f0", "ethernet-phy-ieee802.3-c22";
+		reg = <0>;
+	};
+};
+
+&msc0 {
+	bus-width = <8>;
+	max-frequency = <50000000>;
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pins_msc0>;
+
+	non-removable;
+
+	status = "okay";
+};
+
+&msc1 {
+	bus-width = <4>;
+	max-frequency = <50000000>;
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pins_msc1>;
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	non-removable;
+
+	mmc-pwrseq = <&wlan_pwrseq>;
+
+	status = "okay";
+
+	ap6212a: wifi@1 {
+		compatible = "brcm,bcm4329-fmac";
+		reg = <1>;
+
+		interrupt-parent = <&gpc>;
+		interrupts = <16 IRQ_TYPE_EDGE_FALLING>;
+		interrupt-names = "host-wake";
+
+		brcm,drive-strength = <10>;
+	};
+};
+
+&pinctrl {
+	pins_i2c0: i2c0 {
+		function = "i2c0";
+		groups = "i2c0-data";
+		bias-disable;
+	};
+
+	pins_uart2: uart2 {
+		function = "uart2";
+		groups = "uart2-data-d";
+		bias-disable;
+	};
+
+	pins_mac: mac {
+		function = "mac";
+		groups = "mac";
+		bias-disable;
+	};
+
+	pins_msc0: msc0 {
+		function = "mmc0";
+		groups = "mmc0-1bit", "mmc0-4bit", "mmc0-8bit";
+		bias-disable;
+	};
+
+	pins_msc1: msc1 {
+		function = "mmc1";
+		groups = "mmc1-1bit", "mmc1-4bit";
+		bias-disable;
+	};
+};

arch/mips/boot/dts/ingenic/x1000.dtsi

···
+// SPDX-License-Identifier: GPL-2.0
+#include <dt-bindings/clock/x1000-cgu.h>
+#include <dt-bindings/dma/x1000-dma.h>
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	compatible = "ingenic,x1000", "ingenic,x1000e";
+
+	cpuintc: interrupt-controller {
+		#address-cells = <0>;
+		#interrupt-cells = <1>;
+		interrupt-controller;
+		compatible = "mti,cpu-interrupt-controller";
+	};
+
+	intc: interrupt-controller@10001000 {
+		compatible = "ingenic,x1000-intc", "ingenic,jz4780-intc";
+		reg = <0x10001000 0x50>;
+
+		interrupt-controller;
+		#interrupt-cells = <1>;
+
+		interrupt-parent = <&cpuintc>;
+		interrupts = <2>;
+	};
+
+	exclk: ext {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+	};
+
+	rtclk: rtc {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+	};
+
+	cgu: x1000-cgu@10000000 {
+		compatible = "ingenic,x1000-cgu";
+		reg = <0x10000000 0x100>;
+
+		#clock-cells = <1>;
+
+		clocks = <&exclk>, <&rtclk>;
+		clock-names = "ext", "rtc";
+	};
+
+	tcu: timer@10002000 {
+		compatible = "ingenic,x1000-tcu",
+				 "ingenic,jz4770-tcu",
+				 "simple-mfd";
+		reg = <0x10002000 0x1000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x0 0x10002000 0x1000>;
+
+		#clock-cells = <1>;
+
+		clocks = <&cgu X1000_CLK_RTCLK
+			  &cgu X1000_CLK_EXCLK
+			  &cgu X1000_CLK_PCLK>;
+		clock-names = "rtc", "ext", "pclk";
+
+		interrupt-controller;
+		#interrupt-cells = <1>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <27 26 25>;
+
+		wdt: watchdog@0 {
+			compatible = "ingenic,x1000-watchdog", "ingenic,jz4780-watchdog";
+			reg = <0x0 0x10>;
+
+			clocks = <&cgu X1000_CLK_RTCLK>;
+			clock-names = "wdt";
+		};
+	};
+
+	rtc: rtc@10003000 {
+		compatible = "ingenic,x1000-rtc", "ingenic,jz4780-rtc";
+		reg = <0x10003000 0x4c>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <32>;
+
+		clocks = <&cgu X1000_CLK_RTCLK>;
+		clock-names = "rtc";
+	};
+
+	pinctrl: pin-controller@10010000 {
+		compatible = "ingenic,x1000-pinctrl";
+		reg = <0x10010000 0x800>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		gpa: gpio@0 {
+			compatible = "ingenic,x1000-gpio";
+			reg = <0>;
+
+			gpio-controller;
+			gpio-ranges = <&pinctrl 0 0 32>;
+			#gpio-cells = <2>;
+
+			interrupt-controller;
+			#interrupt-cells = <2>;
+
+			interrupt-parent = <&intc>;
+			interrupts = <17>;
+		};
+
+		gpb: gpio@1 {
+			compatible = "ingenic,x1000-gpio";
+			reg = <1>;
+
+			gpio-controller;
+			gpio-ranges = <&pinctrl 0 32 32>;
+			#gpio-cells = <2>;
+
+			interrupt-controller;
+			#interrupt-cells = <2>;
+
+			interrupt-parent = <&intc>;
+			interrupts = <16>;
+		};
+
+		gpc: gpio@2 {
+			compatible = "ingenic,x1000-gpio";
+			reg = <2>;
+
+			gpio-controller;
+			gpio-ranges = <&pinctrl 0 64 32>;
+			#gpio-cells = <2>;
+
+			interrupt-controller;
+			#interrupt-cells = <2>;
+
+			interrupt-parent = <&intc>;
+			interrupts = <15>;
+		};
+
+		gpd: gpio@3 {
+			compatible = "ingenic,x1000-gpio";
+			reg = <3>;
+
+			gpio-controller;
+			gpio-ranges = <&pinctrl 0 96 32>;
+			#gpio-cells = <2>;
+
+			interrupt-controller;
+			#interrupt-cells = <2>;
+
+			interrupt-parent = <&intc>;
+			interrupts = <14>;
+		};
+	};
+
+	i2c0: i2c-controller@10050000 {
+		compatible = "ingenic,x1000-i2c";
+		reg = <0x10050000 0x1000>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <60>;
+
+		clocks = <&cgu X1000_CLK_I2C0>;
+
+		status = "disabled";
+	};
+
+	i2c1: i2c-controller@10051000 {
+		compatible = "ingenic,x1000-i2c";
+		reg = <0x10051000 0x1000>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <59>;
+
+		clocks = <&cgu X1000_CLK_I2C1>;
+
+		status = "disabled";
+	};
+
+	i2c2: i2c-controller@10052000 {
+		compatible = "ingenic,x1000-i2c";
+		reg = <0x10052000 0x1000>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <58>;
+
+		clocks = <&cgu X1000_CLK_I2C2>;
+
+		status = "disabled";
+	};
+
+	uart0: serial@10030000 {
+		compatible = "ingenic,x1000-uart";
+		reg = <0x10030000 0x100>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <51>;
+
+		clocks = <&exclk>, <&cgu X1000_CLK_UART0>;
+		clock-names = "baud", "module";
+
+		status = "disabled";
+	};
+
+	uart1: serial@10031000 {
+		compatible = "ingenic,x1000-uart";
+		reg = <0x10031000 0x100>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <50>;
+
+		clocks = <&exclk>, <&cgu X1000_CLK_UART1>;
+		clock-names = "baud", "module";
+
+		status = "disabled";
+	};
+
+	uart2: serial@10032000 {
+		compatible = "ingenic,x1000-uart";
+		reg = <0x10032000 0x100>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <49>;
+
+		clocks = <&exclk>, <&cgu X1000_CLK_UART2>;
+		clock-names = "baud", "module";
+
+		status = "disabled";
+	};
+
+	pdma: dma-controller@13420000 {
+		compatible = "ingenic,x1000-dma";
+		reg = <0x13420000 0x400
+			   0x13421000 0x40>;
+		#dma-cells = <2>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <10>;
+
+		clocks = <&cgu X1000_CLK_PDMA>;
+	};
+
+	mac: ethernet@134b0000 {
+		compatible = "ingenic,x1000-mac", "snps,dwmac";
+		reg = <0x134b0000 0x2000>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <55>;
+		interrupt-names = "macirq";
+
+		clocks = <&cgu X1000_CLK_MAC>;
+		clock-names = "stmmaceth";
+
+		status = "disabled";
+
+		mdio: mdio {
+			compatible = "snps,dwmac-mdio";
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			status = "disabled";
+		};
+	};
+
+	msc0: mmc@13450000 {
+		compatible = "ingenic,x1000-mmc";
+		reg = <0x13450000 0x1000>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <37>;
+
+		clocks = <&cgu X1000_CLK_MSC0>;
+		clock-names = "mmc";
+
+		cap-sd-highspeed;
+		cap-mmc-highspeed;
+		cap-sdio-irq;
+
+		dmas = <&pdma X1000_DMA_MSC0_RX 0xffffffff>,
+			   <&pdma X1000_DMA_MSC0_TX 0xffffffff>;
+		dma-names = "rx", "tx";
+
+		status = "disabled";
+	};
+
+	msc1: mmc@13460000 {
+		compatible = "ingenic,x1000-mmc";
+		reg = <0x13460000 0x1000>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <36>;
+
+		clocks = <&cgu X1000_CLK_MSC1>;
+		clock-names = "mmc";
+
+		cap-sd-highspeed;
+		cap-mmc-highspeed;
+		cap-sdio-irq;
+
+		dmas = <&pdma X1000_DMA_MSC1_RX 0xffffffff>,
+			   <&pdma X1000_DMA_MSC1_TX 0xffffffff>;
+		dma-names = "rx", "tx";
+
+		status = "disabled";
+	};
+};

arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts

···
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinmux_i2s_gpio>;		/* GPIO0..3 */
 
+	fifo-size = <8>;
+	tx-threshold = <8>;
+
 	rts-gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
 	cts-gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
 };
···
 
 &watchdog {
 	status = "okay";
+};
+
+&wmac {
+	status = "okay";
+	mediatek,mtd-eeprom = <&factory 0x0000>;
 };

arch/mips/boot/dts/ralink/mt7628a.dtsi

···
 		interrupt-parent = <&intc>;
 		interrupts = <18>;
 	};
+
+	wmac: wmac@10300000 {
+		compatible = "mediatek,mt7628-wmac";
+		reg = <0x10300000 0x100000>;
+
+		interrupt-parent = <&cpuintc>;
+		interrupts = <6>;
+
+		status = "disabled";
+	};
 };

arch/mips/cavium-octeon/octeon-irq.c

···
 	struct octeon_irq_cib_chip_data *cd;
 
 	if (hw >= host_data->max_bits) {
-		pr_err("ERROR: %s mapping %u is to big!\n",
+		pr_err("ERROR: %s mapping %u is too big!\n",
 		       irq_domain_get_of_node(d)->name, (unsigned)hw);
 		return -EINVAL;
 	}

arch/mips/configs/cu1000-neo_defconfig

···
+CONFIG_LOCALVERSION_AUTO=y
+CONFIG_KERNEL_GZIP=y
+CONFIG_SYSVIPC=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_PREEMPT=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_CGROUPS=y
+CONFIG_MEMCG=y
+CONFIG_MEMCG_KMEM=y
+CONFIG_CGROUP_SCHED=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_NAMESPACES=y
+CONFIG_USER_NS=y
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_SYSCTL_SYSCALL=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_EMBEDDED=y
+# CONFIG_VM_EVENT_COUNTERS is not set
+# CONFIG_COMPAT_BRK is not set
+CONFIG_SLAB=y
+CONFIG_MACH_INGENIC=y
+CONFIG_X1000_CU1000_NEO=y
+CONFIG_HIGHMEM=y
+CONFIG_HZ_100=y
+# CONFIG_SECCOMP is not set
+# CONFIG_SUSPEND is not set
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+# CONFIG_COMPACTION is not set
+CONFIG_CMA=y
+CONFIG_CMA_AREAS=7
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_CFG80211=y
+CONFIG_UEVENT_HELPER=y
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_DEVTMPFS=y
+# CONFIG_FW_LOADER is not set
+# CONFIG_ALLOW_DEV_COREDUMP is not set
+CONFIG_NETDEVICES=y
+CONFIG_STMMAC_ETH=y
+CONFIG_SMSC_PHY=y
+CONFIG_BRCMFMAC=y
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO is not set
+CONFIG_VT_HW_CONSOLE_BINDING=y
+CONFIG_LEGACY_PTY_COUNT=2
+CONFIG_SERIAL_EARLYCON=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_NR_UARTS=3
+CONFIG_SERIAL_8250_RUNTIME_UARTS=3
+CONFIG_SERIAL_8250_INGENIC=y
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_HW_RANDOM is not set
+CONFIG_I2C=y
+CONFIG_I2C_JZ4780=y
+CONFIG_GPIO_SYSFS=y
+CONFIG_SENSORS_ADS7828=y
+CONFIG_WATCHDOG=y
+CONFIG_JZ4740_WDT=y
+# CONFIG_LCD_CLASS_DEVICE is not set
+# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
+# CONFIG_VGA_CONSOLE is not set
+# CONFIG_HID is not set
+# CONFIG_USB_SUPPORT is not set
+CONFIG_MMC=y
+CONFIG_MMC_JZ4740=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_JZ4740=y
+CONFIG_DMADEVICES=y
+CONFIG_DMA_JZ4780=y
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_NVMEM=y
+CONFIG_NVMEM_SYSFS=y
+CONFIG_EXT4_FS=y
+# CONFIG_DNOTIFY is not set
+CONFIG_AUTOFS_FS=y
+CONFIG_PROC_KCORE=y
+# CONFIG_PROC_PAGE_MONITOR is not set
+CONFIG_TMPFS=y
+CONFIG_CONFIGFS_FS=y
+CONFIG_NFS_FS=y
+CONFIG_NLS=y
+CONFIG_NLS_CODEPAGE_936=y
+CONFIG_NLS_CODEPAGE_950=y
+CONFIG_NLS_ASCII=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_NLS_UTF8=y
+CONFIG_CRYPTO_ECHAINIV=y
+CONFIG_CRYPTO_AES=y
+CONFIG_CRYPTO_DEFLATE=y
+CONFIG_CRYPTO_LZO=y
+CONFIG_PRINTK_TIME=y
+CONFIG_CONSOLE_LOGLEVEL_DEFAULT=15
+CONFIG_CONSOLE_LOGLEVEL_QUIET=15
+CONFIG_MESSAGE_LOGLEVEL_DEFAULT=7
+CONFIG_DEBUG_INFO=y
+CONFIG_STRIP_ASM_SYMS=y
+CONFIG_DEBUG_FS=y
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_PANIC_ON_OOPS=y
+CONFIG_PANIC_TIMEOUT=10
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_DEBUG_PREEMPT is not set
+CONFIG_STACKTRACE=y
+# CONFIG_FTRACE is not set
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="earlycon clk_ignore_unused"

arch/mips/configs/generic/board-ocelot.config

···
 CONFIG_SPI_DW_MMIO=y
 CONFIG_SPI_SPIDEV=y
 
+CONFIG_PINCTRL=y
 CONFIG_PINCTRL_OCELOT=y
 
 CONFIG_GPIO_SYSFS=y

arch/mips/include/asm/Kbuild

···
 generic-y += qrwlock.h
 generic-y += qspinlock.h
 generic-y += sections.h
+generic-y += serial.h
 generic-y += trace_clock.h
 generic-y += unaligned.h
 generic-y += user.h

arch/mips/include/asm/bootinfo.h

···
 #define  MACH_INGENIC_JZ4770	2	/* JZ4770 SOC		*/
 #define  MACH_INGENIC_JZ4780	3	/* JZ4780 SOC		*/
 #define  MACH_INGENIC_X1000		4	/* X1000 SOC		*/
+#define  MACH_INGENIC_X1830		5	/* X1830 SOC		*/
 
 extern char *system_type;
 const char *get_system_type(void);

arch/mips/include/asm/cpu-features.h

···
 # define cpu_has_perf		__opt(MIPS_CPU_PERF)
 #endif
 
+#ifndef cpu_has_mac2008_only
+# define cpu_has_mac2008_only	__opt(MIPS_CPU_MAC_2008_ONLY)
+#endif
+
 #ifdef CONFIG_SMP
 /*
  * Some systems share FTLB RAMs between threads within a core (siblings in

arch/mips/include/asm/cpu.h

···
 #define PRID_COMP_NETLOGIC	0x0c0000
 #define PRID_COMP_CAVIUM	0x0d0000
 #define PRID_COMP_LOONGSON	0x140000
-#define PRID_COMP_INGENIC_D0	0xd00000	/* JZ4740, JZ4750 */
+#define PRID_COMP_INGENIC_D0	0xd00000	/* JZ4740, JZ4750, X1830 */
 #define PRID_COMP_INGENIC_D1	0xd10000	/* JZ4770, JZ4775, X1000 */
 #define PRID_COMP_INGENIC_E1	0xe10000	/* JZ4780 */
 
···
  * These are the PRID's for when 23:16 == PRID_COMP_INGENIC_*
  */
 
-#define PRID_IMP_XBURST	       0x0200
+#define PRID_IMP_XBURST_REV1	0x0200	/* XBurst with MXU SIMD ISA		*/
+#define PRID_IMP_XBURST_REV2	0x0100	/* XBurst with MXU2 SIMD ISA	*/
 
 /*
  * These are the PRID's for when 23:16 == PRID_COMP_NETLOGIC
···
 #define MIPS_CPU_MT_PER_TC_PERF_COUNTERS \
 				BIT_ULL(56)	/* CPU has perf counters implemented per TC (MIPSMT ASE) */
 #define MIPS_CPU_MMID		BIT_ULL(57)	/* CPU supports MemoryMapIDs */
+#define MIPS_CPU_MAC_2008_ONLY	BIT_ULL(58)	/* CPU Only support MAC2008 Fused multiply-add instruction */
 
 /*
  * CPU ASE encodings

arch/mips/include/asm/gio_device.h

···
 };
 #define to_gio_driver(drv) container_of(drv, struct gio_driver, driver)
 
-extern const struct gio_device_id *gio_match_device(const struct gio_device_id *,
-						    const struct gio_device *);
 extern struct gio_device *gio_dev_get(struct gio_device *);
 extern void gio_dev_put(struct gio_device *);
 

arch/mips/include/asm/hazards.h

···
  * TLB hazards
  */
 #if (defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)) && \
-	!defined(CONFIG_CPU_CAVIUM_OCTEON) && !defined(CONFIG_LOONGSON3_ENHANCEMENT)
+	!defined(CONFIG_CPU_CAVIUM_OCTEON) && !defined(CONFIG_CPU_LOONGSON64)
 
 /*
  * MIPSR2 defines ehb for hazard avoidance
···
 } while (0)
 
 #elif defined(CONFIG_MIPS_ALCHEMY) || defined(CONFIG_CPU_CAVIUM_OCTEON) || \
-	defined(CONFIG_CPU_LOONGSON2EF) || defined(CONFIG_LOONGSON3_ENHANCEMENT) || \
+	defined(CONFIG_CPU_LOONGSON2EF) || defined(CONFIG_CPU_LOONGSON64) || \
 	defined(CONFIG_CPU_R10000) || defined(CONFIG_CPU_R5500) || defined(CONFIG_CPU_XLR)
 
 /*

arch/mips/include/asm/irqflags.h

···
 #include <asm/compiler.h>
 #include <asm/hazards.h>
 
-#if defined(CONFIG_CPU_MIPSR2) || defined (CONFIG_CPU_MIPSR6)
+#if defined(CONFIG_CPU_HAS_DIEI)
 
 static inline void arch_local_irq_disable(void)
 {
···
 void arch_local_irq_disable(void);
 unsigned long arch_local_irq_save(void);
 void arch_local_irq_restore(unsigned long flags);
-#endif /* CONFIG_CPU_MIPSR2 || CONFIG_CPU_MIPSR6 */
+#endif /* CONFIG_CPU_HAS_DIEI */
 
 static inline void arch_local_irq_enable(void)
 {
···
 	"	.set	push						\n"
 	"	.set	reorder						\n"
 	"	.set	noat						\n"
-#if   defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
+#if defined(CONFIG_CPU_HAS_DIEI)
 	"	ei							\n"
 #else
 	"	mfc0	$1,$12						\n"

arch/mips/include/asm/local.h

···
 		__asm__ __volatile__(
 		"	.set	push					\n"
 		"	.set	arch=r4000				\n"
+			__SYNC(full, loongson3_war) "			\n"
 		"1:"	__LL	"%1, %2		# local_add_return	\n"
 		"	addu	%0, %1, %3				\n"
 			__SC	"%0, %2					\n"
···
 		__asm__ __volatile__(
 		"	.set	push					\n"
 		"	.set	"MIPS_ISA_ARCH_LEVEL"			\n"
+			__SYNC(full, loongson3_war) "			\n"
 		"1:"	__LL	"%1, %2		# local_add_return	\n"
 		"	addu	%0, %1, %3				\n"
 			__SC	"%0, %2					\n"
···
 		__asm__ __volatile__(
 		"	.set	push					\n"
 		"	.set	arch=r4000				\n"
+			__SYNC(full, loongson3_war) "			\n"
 		"1:"	__LL	"%1, %2		# local_sub_return	\n"
 		"	subu	%0, %1, %3				\n"
 			__SC	"%0, %2					\n"
···
 		__asm__ __volatile__(
 		"	.set	push					\n"
 		"	.set	"MIPS_ISA_ARCH_LEVEL"			\n"
+			__SYNC(full, loongson3_war) "			\n"
 		"1:"	__LL	"%1, %2		# local_sub_return	\n"
 		"	subu	%0, %1, %3				\n"
 			__SC	"%0, %2					\n"

arch/mips/include/asm/mach-ip27/kernel-entry-init.h

···
 #define __ASM_MACH_IP27_KERNEL_ENTRY_H
 
 #include <asm/sn/addrs.h>
-#include <asm/sn/sn0/hubni.h>
+#include <asm/sn/agent.h>
 #include <asm/sn/klkernvars.h>
-
-/*
- * Returns the local nasid into res.
- */
-	.macro GET_NASID_ASM res
-	dli	\res, LOCAL_HUB_ADDR(NI_STATUS_REV_ID)
-	ld	\res, (\res)
-	and	\res, NSRI_NODEID_MASK
-	dsrl	\res, NSRI_NODEID_SHFT
-	.endm
 
 /*
  * TLB bits

arch/mips/include/asm/mach-ip27/mangle-port.h

···
 #ifndef __ASM_MACH_IP27_MANGLE_PORT_H
 #define __ASM_MACH_IP27_MANGLE_PORT_H
 
-#define __swizzle_addr_b(port)	(port)
+#define __swizzle_addr_b(port)	((port) ^ 3)
 #define __swizzle_addr_w(port)	((port) ^ 2)
 #define __swizzle_addr_l(port)	(port)
 #define __swizzle_addr_q(port)	(port)
···
 # define ioswabl(a, x)		(x)
 # define __mem_ioswabl(a, x)	cpu_to_le32(x)
 # define ioswabq(a, x)		(x)
-# define __mem_ioswabq(a, x)	cpu_to_le32(x)
+# define __mem_ioswabq(a, x)	cpu_to_le64(x)
 
 #endif /* __ASM_MACH_IP27_MANGLE_PORT_H */

arch/mips/include/asm/mach-ip27/mmzone.h

···
 
 #include <asm/sn/addrs.h>
 #include <asm/sn/arch.h>
-#include <asm/sn/hub.h>
+#include <asm/sn/agent.h>
+#include <asm/sn/klkernvars.h>
 
 #define pa_to_nid(addr)		NASID_GET(addr)
 
···
 	kern_vars_t	kern_vars;
 	DECLARE_BITMAP(h_bigwin_used, HUB_NUM_BIG_WINDOW);
 	cpumask_t	h_cpus;
-	unsigned long slice_map;
 };
 
 struct node_data {

arch/mips/include/asm/mach-ip27/topology.h

···
 #ifndef _ASM_MACH_TOPOLOGY_H
 #define _ASM_MACH_TOPOLOGY_H	1
 
-#include <asm/sn/hub.h>
 #include <asm/sn/types.h>
 #include <asm/mmzone.h>
 
 struct cpuinfo_ip27 {
 	nasid_t		p_nasid;	/* my node ID in numa-as-id-space */
+	unsigned short	p_speed;	/* cpu speed in MHz */
 	unsigned char	p_slice;	/* Physical position on node board */
 };
 

arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h

···
 #define cpu_has_wsbh		1
 #define cpu_has_ic_fills_f_dc	1
 #define cpu_hwrena_impl_bits	0xc0000000
+#define cpu_has_mac2008_only	1
+#define cpu_has_mips_r2_exec_hazard 0
 
 #endif /* __ASM_MACH_LOONGSON64_CPU_FEATURE_OVERRIDES_H */

arch/mips/include/asm/mipsregs.h

···
 /*
  * Bits 22:20 of the FPU Status Register will be read as 0,
  * and should be written as zero.
+ * MAC2008 was removed in Release 5 so we still treat it as
+ * reserved.
  */
 #define FPU_CSR_RSVD	(_ULCAST_(7) << 20)
 
+#define FPU_CSR_MAC2008	(_ULCAST_(1) << 20)
 #define FPU_CSR_ABS2008	(_ULCAST_(1) << 19)
 #define FPU_CSR_NAN2008	(_ULCAST_(1) << 18)
 

arch/mips/include/asm/pci/bridge.h

···
 	unsigned long		baddr;
 	unsigned long		intr_addr;
 	struct irq_domain	*domain;
-	unsigned int		pci_int[8];
+	unsigned int		pci_int[8][2];
+	unsigned int		int_mapping[8][2];
 	u32			ioc3_sid[8];
 	nasid_t			nasid;
 };

arch/mips/include/asm/serial.h

···
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * Copyright (C) 2017 MIPS Tech, LLC
- */
-#ifndef __ASM__SERIAL_H
-#define __ASM__SERIAL_H
-
-#ifdef CONFIG_MIPS_GENERIC
-/*
- * Generic kernels cannot know a correct value for all platforms at
- * compile time. Set it to 0 to prevent 8250_early using it
- */
-#define BASE_BAUD 0
-#else
-#include <asm-generic/serial.h>
-#endif
-
-#endif /* __ASM__SERIAL_H */

arch/mips/include/asm/sn/arch.h

···
 #define INVALID_MODULE		(moduleid_t)-1
 #define INVALID_PARTID		(partid_t)-1
 
-extern nasid_t get_nasid(void);
-extern int get_cpu_slice(cpuid_t);
-
 #endif /* _ASM_SN_ARCH_H */

arch/mips/include/asm/sn/hub.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ASM_SN_HUB_H
-#define __ASM_SN_HUB_H
-
-#include <linux/types.h>
-#include <linux/cpumask.h>
-#include <asm/sn/types.h>
-#include <asm/sn/io.h>
-#include <asm/sn/klkernvars.h>
-#include <asm/xtalk/xtalk.h>
-
-/* ip27-hubio.c */
-extern unsigned long hub_pio_map(nasid_t nasid, xwidgetnum_t widget,
-			  unsigned long xtalk_addr, size_t size);
-extern void hub_pio_init(nasid_t nasid);
-
-#endif /* __ASM_SN_HUB_H */

arch/mips/include/asm/sn/intr.h

···
 #ifndef __ASM_SN_INTR_H
 #define __ASM_SN_INTR_H
 
-/* Number of interrupt levels associated with each interrupt register. */
-#define N_INTPEND_BITS		64
-
-#define INT_PEND0_BASELVL	0
-#define INT_PEND1_BASELVL	64
-
-#define N_INTPENDJUNK_BITS	8
-#define INTPENDJUNK_CLRBIT	0x80
-
 /*
  * Macros to manipulate the interrupt register on the calling hub chip.
  */
···
 #define CPU_RESCHED_B_IRQ	 8
 #define CPU_CALL_A_IRQ		 9
 #define CPU_CALL_B_IRQ		10
-#define MSC_MESG_INTR		11
-#define BASE_PCI_IRQ		12
-
-/*
- * INT_PEND0 again, bits determined by hardware / hardcoded:
- */
-#define SDISK_INTR		63	/* SABLE name */
-#define IP_PEND0_6_63		63	/* What is this bit? */
 
 /*
  * INT_PEND1 hard-coded bits:

arch/mips/include/asm/sn/ioc3.h

···
 
 /* SUPERIO uart register map */
 struct ioc3_uartregs {
+	u8	iu_lcr;
 	union {
-		u8	iu_rbr;	/* read only, DLAB == 0 */
-		u8	iu_thr;	/* write only, DLAB == 0 */
-		u8	iu_dll;	/* DLAB == 1 */
+		u8	iu_iir;	/* read only */
+		u8	iu_fcr;	/* write only */
 	};
 	union {
 		u8	iu_ier;	/* DLAB == 0 */
 		u8	iu_dlm;	/* DLAB == 1 */
 	};
 	union {
-		u8	iu_iir;	/* read only */
-		u8	iu_fcr;	/* write only */
+		u8	iu_rbr;	/* read only, DLAB == 0 */
+		u8	iu_thr;	/* write only, DLAB == 0 */
+		u8	iu_dll;	/* DLAB == 1 */
 	};
-	u8	iu_lcr;
-	u8	iu_mcr;
-	u8	iu_lsr;
-	u8	iu_msr;
 	u8	iu_scr;
+	u8	iu_msr;
+	u8	iu_lsr;
+	u8	iu_mcr;
 };
 
 struct ioc3_sioregs {
 	u8	fill[0x141];	/* starts at 0x141 */
 
-	u8	uartc;
 	u8	kbdcg;
+	u8	uartc;
 
-	u8	fill0[0x150 - 0x142 - 1];
+	u8	fill0[0x151 - 0x142 - 1];
 
-	u8	pp_data;
-	u8	pp_dsr;
 	u8	pp_dcr;
+	u8	pp_dsr;
+	u8	pp_data;
 
-	u8	fill1[0x158 - 0x152 - 1];
+	u8	fill1[0x159 - 0x153 - 1];
 
-	u8	pp_fifa;
-	u8	pp_cfgb;
 	u8	pp_ecr;
+	u8	pp_cfgb;
+	u8	pp_fifa;
 
-	u8	fill2[0x168 - 0x15a - 1];
+	u8	fill2[0x16a - 0x15b - 1];
 
-	u8	rtcad;
 	u8	rtcdat;
+	u8	rtcad;
 
-	u8	fill3[0x170 - 0x169 - 1];
+	u8	fill3[0x170 - 0x16b - 1];
 
 	struct ioc3_uartregs	uartb;	/* 0x20170  */
 	struct ioc3_uartregs	uarta;	/* 0x20178  */
···
 #define	IOC3_SUBSYS_IP30_SYSBOARD	0xc304
 #define	IOC3_SUBSYS_MENET		0xc305
 #define	IOC3_SUBSYS_MENET4		0xc306
+#define	IOC3_SUBSYS_IO7			0xc307
+#define	IOC3_SUBSYS_IO8			0xc308
+#define	IOC3_SUBSYS_IO9			0xc309
+#define	IOC3_SUBSYS_IP34_SYSBOARD	0xc30A
 
 #endif /* MIPS_SN_IOC3_H */

arch/mips/include/asm/sn/klconfig.h

···
 extern lboard_t *find_lboard(lboard_t *start, unsigned char type);
 extern klinfo_t *find_component(lboard_t *brd, klinfo_t *kli, unsigned char type);
 extern klinfo_t *find_first_component(lboard_t *brd, unsigned char type);
-extern klcpu_t *nasid_slice_to_cpuinfo(nasid_t, int);
 extern lboard_t *find_lboard_class(lboard_t *start, unsigned char brd_class);
-
-
-extern klcpu_t *sn_get_cpuinfo(cpuid_t cpu);
 
 #endif /* _ASM_SN_KLCONFIG_H */

arch/mips/include/asm/sn/kldir.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.
- *
- * Derived from IRIX <sys/SN/kldir.h>, revision 1.21.
- *
- * Copyright (C) 1992 - 1997, 1999, 2000 Silicon Graphics, Inc.
- * Copyright (C) 1999, 2000 by Ralf Baechle
- */
+/* SPDX-License-Identifier: GPL-2.0 */
+
 #ifndef _ASM_SN_KLDIR_H
 #define _ASM_SN_KLDIR_H
 
-
-/*
- * The kldir memory area resides at a fixed place in each node's memory and
- * provides pointers to most other IP27 memory areas.  This allows us to
- * resize and/or relocate memory areas at a later time without breaking all
- * firmware and kernels that use them.	Indices in the array are
- * permanently dedicated to areas listed below.	 Some memory areas (marked
- * below) reside at a permanently fixed location, but are included in the
- * directory for completeness.
- */
-
 #define KLDIR_MAGIC		0x434d5f53505f5357
 
-/*
- * The upper portion of the memory map applies during boot
- * only and is overwritten by IRIX/SYMMON.
- *
- *				      MEMORY MAP PER NODE
- *
- * 0x2000000 (32M)	   +-----------------------------------------+
- *			   |	  IO6 BUFFERS FOR FLASH ENET IOC3    |
- * 0x1F80000 (31.5M)	   +-----------------------------------------+
- *			   |	  IO6 TEXT/DATA/BSS/stack	     |
- * 0x1C00000 (30M)	   +-----------------------------------------+
- *			   |	  IO6 PROM DEBUG TEXT/DATA/BSS/stack |
- * 0x0800000 (28M)	   +-----------------------------------------+
- *			   |	  IP27 PROM TEXT/DATA/BSS/stack	     |
- * 0x1B00000 (27M)	   +-----------------------------------------+
- *			   |	  IP27 CFG			     |
- * 0x1A00000 (26M)	   +-----------------------------------------+
- *			   |	  Graphics PROM			     |
- * 0x1800000 (24M)	   +-----------------------------------------+
- *			   |	  3rd Party PROM drivers	     |
- * 0x1600000 (22M)	   +-----------------------------------------+
- *			   |					     |
- *			   |	  Free				     |
- *			   |					     |
- *			   +-----------------------------------------+
- *			   |	  UNIX DEBUG Version		     |
- * 0x190000 (2M--)	   +-----------------------------------------+
- *			   |	  SYMMON			     |
- *			   |	  (For UNIX Debug only)		     |
- * 0x34000 (208K)	   +-----------------------------------------+
- *			   |	  SYMMON STACK [NUM_CPU_PER_NODE]    |
- *			   |	  (For UNIX Debug only)		     |
- * 0x25000 (148K)	   +-----------------------------------------+
- *			   |	  KLCONFIG - II (temp)		     |
- *			   |					     |
- *			   |	----------------------------	     |
- *			   |					     |
- *			   |	  UNIX NON-DEBUG Version	     |
- * 0x19000 (100K)	   +-----------------------------------------+
- *
- *
- * The lower portion of the memory map contains information that is
- * permanent and is used by the IP27PROM, IO6PROM and IRIX.
- *
- * 0x19000 (100K)	   +-----------------------------------------+
- *			   |					     |
- *			   |	  PI Error Spools (32K)		     |
- *			   |					     |
- * 0x12000 (72K)	   +-----------------------------------------+
- *			   |	  Unused			     |
- * 0x11c00 (71K)	   +-----------------------------------------+
- *			   |	  CPU 1 NMI Eframe area		     |
- * 0x11a00 (70.5K)	   +-----------------------------------------+
- *			   |	  CPU 0 NMI Eframe area		     |
- * 0x11800 (70K)	   +-----------------------------------------+
- *			   |	  CPU 1 NMI Register save area	     |
- * 0x11600 (69.5K)	   +-----------------------------------------+
- *			   |	  CPU 0 NMI Register save area	     |
- * 0x11400 (69K)	   +-----------------------------------------+
- *			   |	  GDA (1k)			     |
- * 0x11000 (68K)	   +-----------------------------------------+
- *			   |	  Early cache Exception stack	     |
- *			   |		 and/or			     |
- *			   |	  kernel/io6prom nmi registers	     |
- * 0x10800  (66k)	   +-----------------------------------------+
- *			   |	  cache error eframe		     |
- * 0x10400 (65K)	   +-----------------------------------------+
- *			   |	  Exception Handlers (UALIAS copy)   |
- * 0x10000 (64K)	   +-----------------------------------------+
- *			   |					     |
- *			   |					     |
- *			   |	  KLCONFIG - I (permanent) (48K)     |
- *			   |					     |
- *			   |					     |
- *			   |					     |
- * 0x4000 (16K)		   +-----------------------------------------+
- *			   |	  NMI Handler (Protected Page)	     |
- * 0x3000 (12K)		   +-----------------------------------------+
- *			   |	  ARCS PVECTORS (master node only)   |
- * 0x2c00 (11K)		   +-----------------------------------------+
- *			   |	  ARCS TVECTORS (master node only)   |
- * 0x2800 (10K)		   +-----------------------------------------+
- *			   |	  LAUNCH [NUM_CPU]		     |
- * 0x2400 (9K)		   +-----------------------------------------+
- *			   |	  Low memory directory (KLDIR)	     |
- * 0x2000 (8K)		   +-----------------------------------------+
- *			   |	  ARCS SPB (1K)			     |
- * 0x1000 (4K)		   +-----------------------------------------+
- *			   |	  Early cache Exception stack	     |
- *			   |		 and/or			     |
- *			   |	  kernel/io6prom nmi registers	     |
- * 0x800  (2k)		   +-----------------------------------------+
- *			   |	  cache error eframe		     |
- * 0x400 (1K)		   +-----------------------------------------+
- *			   |	  Exception Handlers		     |
- * 0x0	 (0K)		   +-----------------------------------------+
- */
-
-#ifdef __ASSEMBLY__
 #define KLDIR_OFF_MAGIC			0x00
 #define KLDIR_OFF_OFFSET		0x08
 #define KLDIR_OFF_POINTER		0x10
 #define KLDIR_OFF_SIZE			0x18
 #define KLDIR_OFF_COUNT			0x20
 #define KLDIR_OFF_STRIDE		0x28
-#endif /* __ASSEMBLY__ */
-
-/*
- * This is defined here because IP27_SYMMON_STK_SIZE must be at least what
- * we define here.  Since it's set up in the prom.  We can't redefine it later
- * and expect more space to be allocated.  The way to find out the true size
- * of the symmon stacks is to divide SYMMON_STK_SIZE by SYMMON_STK_STRIDE
- * for a particular node.
- */
-#define SYMMON_STACK_SIZE		0x8000
-
-#if defined(PROM)
-
-/*
- * These defines are prom version dependent.  No code other than the IP27
- * prom should attempt to use these values.
- */
-#define IP27_LAUNCH_OFFSET		0x2400
-#define IP27_LAUNCH_SIZE		0x400
-#define IP27_LAUNCH_COUNT		2
-#define IP27_LAUNCH_STRIDE		0x200
-
-#define IP27_KLCONFIG_OFFSET		0x4000
-#define IP27_KLCONFIG_SIZE		0xc000
-#define IP27_KLCONFIG_COUNT		1
-#define IP27_KLCONFIG_STRIDE		0
-
-#define IP27_NMI_OFFSET			0x3000
-#define IP27_NMI_SIZE			0x40
-#define IP27_NMI_COUNT			2
-#define IP27_NMI_STRIDE			0x40
-
-#define IP27_PI_ERROR_OFFSET		0x12000
-#define IP27_PI_ERROR_SIZE		0x4000
-#define IP27_PI_ERROR_COUNT		1
-#define IP27_PI_ERROR_STRIDE		0
-
-#define IP27_SYMMON_STK_OFFSET		0x25000
-#define IP27_SYMMON_STK_SIZE		0xe000
-#define IP27_SYMMON_STK_COUNT		2
-/* IP27_SYMMON_STK_STRIDE must be >= SYMMON_STACK_SIZE */
-#define IP27_SYMMON_STK_STRIDE		0x7000
-
-#define IP27_FREEMEM_OFFSET		0x19000
-#define IP27_FREEMEM_SIZE		-1
-#define IP27_FREEMEM_COUNT		1
-#define IP27_FREEMEM_STRIDE		0
-
-#endif /* PROM */
-/*
- * There will be only one of these in a partition so the IO6 must set it up.
- */
-#define IO6_GDA_OFFSET			0x11000
-#define IO6_GDA_SIZE			0x400
-#define IO6_GDA_COUNT			1
-#define IO6_GDA_STRIDE			0
-
-/*
- * save area of kernel nmi regs in the prom format
- */
-#define IP27_NMI_KREGS_OFFSET		0x11400
-#define IP27_NMI_KREGS_CPU_SIZE		0x200
-/*
- * save area of kernel nmi regs in eframe format
- */
-#define IP27_NMI_EFRAME_OFFSET		0x11800
-#define IP27_NMI_EFRAME_SIZE		0x200
 
 #define KLDIR_ENT_SIZE			0x40
 #define KLDIR_MAX_ENTRIES		(0x400 / 0x40)
···
 	   entry to store partition info. Refer to klpart.h for this. */
 } kldir_ent_t;
 #endif /* !__ASSEMBLY__ */
+
+#ifdef CONFIG_SGI_IP27
+#include <asm/sn/sn0/kldir.h>
+#endif
 
 #endif /* _ASM_SN_KLDIR_H */

arch/mips/include/asm/sn/sn0/hub.h

···
 #define UATTR_MSPEC	2
 #define UATTR_UNCAC	3
 
+#ifdef __ASSEMBLY__
+/*
+ * Returns the local nasid into res.
+ */
+	.macro GET_NASID_ASM res
+	dli	\res, LOCAL_HUB_ADDR(NI_STATUS_REV_ID)
+	ld	\res, (\res)
+	and	\res, NSRI_NODEID_MASK
+	dsrl	\res, NSRI_NODEID_SHFT
+	.endm
+#else
+
+/*
+ * get_nasid() returns the physical node id number of the caller.
+ */
+static inline nasid_t get_nasid(void)
+{
+	return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
+			 >> NSRI_NODEID_SHFT);
+}
+#endif
+
 #endif /* _ASM_SN_SN0_HUB_H */

arch/mips/include/asm/sn/sn0/hubni.h

···
 #define NI_LLP_CB_MAX		0xff
 #define NI_LLP_SN_MAX		0xff
 
+static inline int get_region_shift(void)
+{
+	if (LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_REGIONSIZE_MASK)
+		return NASID_TO_FINEREG_SHFT;
+
+	return NASID_TO_COARSEREG_SHFT;
+}
+
 #endif /* !__ASSEMBLY__ */
 
 #endif /* _ASM_SGI_SN0_HUBNI_H */

arch/mips/include/asm/sn/sn0/ip27.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.
- *
- * Derived from IRIX <sys/SN/SN0/IP27.h>.
- *
- * Copyright (C) 1992 - 1997, 1999 Silicon Graphics, Inc.
- * Copyright (C) 1999, 2006 by Ralf Baechle
- */
-#ifndef _ASM_SN_SN0_IP27_H
-#define _ASM_SN_SN0_IP27_H
-
-#include <asm/mipsregs.h>
-
-/*
- * Simple definitions for the masks which remove SW bits from pte.
- */
-
-#define TLBLO_HWBITSHIFT	0		/* Shift value, for masking */
-
-#ifndef __ASSEMBLY__
-
-#define CAUSE_BERRINTR		IE_IRQ5
-
-#define ECCF_CACHE_ERR	0
-#define ECCF_TAGLO	1
-#define ECCF_ECC	2
-#define ECCF_ERROREPC	3
-#define ECCF_PADDR	4
-#define ECCF_SIZE	(5 * sizeof(long))
-
-#endif /* !__ASSEMBLY__ */
-
-#ifdef __ASSEMBLY__
-
-/*
- * KL_GET_CPUNUM (similar to EV_GET_SPNUM for EVEREST platform) reads
- * the processor number of the calling processor.  The proc parameters
- * must be a register.
- */
-#define KL_GET_CPUNUM(proc)				\
-	dli	proc, LOCAL_HUB(0);			\
-	ld	proc, PI_CPU_NUM(proc)
-
-#endif /* __ASSEMBLY__ */
-
-/*
- * R10000 status register interrupt bit mask usage for IP27.
- */
-#define SRB_SWTIMO	IE_SW0		/* 0x0100 */
-#define SRB_NET		IE_SW1		/* 0x0200 */
-#define SRB_DEV0	IE_IRQ0		/* 0x0400 */
-#define SRB_DEV1	IE_IRQ1		/* 0x0800 */
-#define SRB_TIMOCLK	IE_IRQ2		/* 0x1000 */
-#define SRB_PROFCLK	IE_IRQ3		/* 0x2000 */
-#define SRB_ERR		IE_IRQ4		/* 0x4000 */
-#define SRB_SCHEDCLK	IE_IRQ5		/* 0x8000 */
-
-#define SR_IBIT_HI	SRB_DEV0
-#define SR_IBIT_PROF	SRB_PROFCLK
-
-#define SRB_SWTIMO_IDX		0
-#define SRB_NET_IDX		1
-#define SRB_DEV0_IDX		2
-#define SRB_DEV1_IDX		3
-#define SRB_TIMOCLK_IDX		4
-#define SRB_PROFCLK_IDX		5
-#define SRB_ERR_IDX		6
-#define SRB_SCHEDCLK_IDX	7
-
-#define NUM_CAUSE_INTRS		8
-
-#define SCACHE_LINESIZE 128
-#define SCACHE_LINEMASK (SCACHE_LINESIZE - 1)
-
-#include <asm/sn/addrs.h>
-
-#define LED_CYCLE_MASK	0x0f
-#define LED_CYCLE_SHFT	4
-
-#define SEND_NMI(_nasid, _slice)	\
-	  REMOTE_HUB_S((_nasid),  (PI_NMI_A + ((_slice) * PI_NMI_OFFSET)), 1)
-
-#endif /* _ASM_SN_SN0_IP27_H */

arch/mips/include/asm/sn/sn0/kldir.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Derived from IRIX <sys/SN/kldir.h>, revision 1.21.
+ *
+ * Copyright (C) 1992 - 1997, 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 1999, 2000 by Ralf Baechle
+ */
+#ifndef _ASM_SN_SN0_KLDIR_H
+#define _ASM_SN_SN0_KLDIR_H
+
+
+/*
+ * The kldir memory area resides at a fixed place in each node's memory and
+ * provides pointers to most other IP27 memory areas.  This allows us to
+ * resize and/or relocate memory areas at a later time without breaking all
+ * firmware and kernels that use them.	Indices in the array are
+ * permanently dedicated to areas listed below.	 Some memory areas (marked
+ * below) reside at a permanently fixed location, but are included in the
+ * directory for completeness.
+ */
+
+/*
+ * The upper portion of the memory map applies during boot
+ * only and is overwritten by IRIX/SYMMON.
+ *
+ *				      MEMORY MAP PER NODE
+ *
+ * 0x2000000 (32M)	   +-----------------------------------------+
+ *			   |	  IO6 BUFFERS FOR FLASH ENET IOC3    |
+ * 0x1F80000 (31.5M)	   +-----------------------------------------+
+ *			   |	  IO6 TEXT/DATA/BSS/stack	     |
+ * 0x1C00000 (30M)	   +-----------------------------------------+
+ *			   |	  IO6 PROM DEBUG TEXT/DATA/BSS/stack |
+ * 0x0800000 (28M)	   +-----------------------------------------+
+ *			   |	  IP27 PROM TEXT/DATA/BSS/stack	     |
+ * 0x1B00000 (27M)	   +-----------------------------------------+
+ *			   |	  IP27 CFG			     |
+ * 0x1A00000 (26M)	   +-----------------------------------------+
+ *			   |	  Graphics PROM			     |
+ * 0x1800000 (24M)	   +-----------------------------------------+
+ *			   |	  3rd Party PROM drivers	     |
+ * 0x1600000 (22M)	   +-----------------------------------------+
+ *			   |					     |
+ *			   |	  Free				     |
+ *			   |					     |
+ *			   +-----------------------------------------+
+ *			   |	  UNIX DEBUG Version		     |
+ * 0x190000 (2M--)	   +-----------------------------------------+
+ *			   |	  SYMMON			     |
+ *			   |	  (For UNIX Debug only)		     |
+ * 0x34000 (208K)	   +-----------------------------------------+
+ *			   |	  SYMMON STACK [NUM_CPU_PER_NODE]    |
+ *			   |	  (For UNIX Debug only)		     |
+ * 0x25000 (148K)	   +-----------------------------------------+
+ *			   |	  KLCONFIG - II (temp)		     |
+ *			   |					     |
+ *			   |	----------------------------	     |
+ *			   |					     |
+ *			   |	  UNIX NON-DEBUG Version	     |
+ * 0x19000 (100K)	   +-----------------------------------------+
+ *
+ *
+ * The lower portion of the memory map contains information that is
+ * permanent and is used by the IP27PROM, IO6PROM and IRIX.
+ *
+ * 0x19000 (100K)	   +-----------------------------------------+
+ *			   |					     |
+ *			   |	  PI Error Spools (32K)		     |
+ *			   |					     |
+ * 0x12000 (72K)	   +-----------------------------------------+
+ *			   |	  Unused			     |
+ * 0x11c00 (71K)	   +-----------------------------------------+
+ *			   |	  CPU 1 NMI Eframe area		     |
+ * 0x11a00 (70.5K)	   +-----------------------------------------+
+ *			   |	  CPU 0 NMI Eframe area		     |
+ * 0x11800 (70K)	   +-----------------------------------------+
+ *			   |	  CPU 1 NMI Register save area	     |
+ * 0x11600 (69.5K)	   +-----------------------------------------+
+ *			   |	  CPU 0 NMI Register save area	     |
+ * 0x11400 (69K)	   +-----------------------------------------+
+ *			   |	  GDA (1k)			     |
+ * 0x11000 (68K)	   +-----------------------------------------+
+ *			   |	  Early cache Exception stack	     |
+ *			   |		 and/or			     |
+ *			   |	  kernel/io6prom nmi registers	     |
+ * 0x10800  (66k)	   +-----------------------------------------+
+ *			   |	  cache error eframe		     |
+ * 0x10400 (65K)	   +-----------------------------------------+
+ *			   |	  Exception Handlers (UALIAS copy)   |
+ * 0x10000 (64K)	   +-----------------------------------------+
+ *			   |					     |
+ *			   |					     |
+ *			   |	  KLCONFIG - I (permanent) (48K)     |
+ *			   |					     |
+ *			   |					     |
+ *			   |					     |
+ * 0x4000 (16K)		   +-----------------------------------------+
+ *			   |	  NMI Handler (Protected Page)	     |
+ * 0x3000 (12K)		   +-----------------------------------------+
+ *			   |	  ARCS PVECTORS (master node only)   |
+ * 0x2c00 (11K)		   +-----------------------------------------+
+ *			   |	  ARCS TVECTORS (master node only)   |
+ * 0x2800 (10K)		   +-----------------------------------------+
+ *			   |	  LAUNCH [NUM_CPU]		     |
+ * 0x2400 (9K)		   +-----------------------------------------+
+ *			   |	  Low memory directory (KLDIR)	     |
+ * 0x2000 (8K)		   +-----------------------------------------+
+ *			   |	  ARCS SPB (1K)			     |
+ * 0x1000 (4K)		   +-----------------------------------------+
+ *			   |	  Early cache Exception stack	     |
+ *			   |		 and/or			     |
+ *			   |	  kernel/io6prom nmi registers	     |
+ * 0x800  (2k)		   +-----------------------------------------+
+ *			   |	  cache error eframe		     |
+ * 0x400 (1K)		   +-----------------------------------------+
+ *			   |	  Exception Handlers		     |
+ * 0x0	 (0K)		   +-----------------------------------------+
+ */
+
+/*
+ * This is defined here because IP27_SYMMON_STK_SIZE must be at least what
+ * we define here.  Since it's set up in the prom.  We can't redefine it later
+ * and expect more space to be allocated.  The way to find out the true size
+ * of the symmon stacks is to divide SYMMON_STK_SIZE by SYMMON_STK_STRIDE
+ * for a particular node.
+ */
+#define SYMMON_STACK_SIZE		0x8000
+
+#if defined(PROM)
+
+/*
+ * These defines are prom version dependent.  No code other than the IP27
+ * prom should attempt to use these values.
+ */
+#define IP27_LAUNCH_OFFSET		0x2400
+#define IP27_LAUNCH_SIZE		0x400
+#define IP27_LAUNCH_COUNT		2
+#define IP27_LAUNCH_STRIDE		0x200
+
+#define IP27_KLCONFIG_OFFSET		0x4000
+#define IP27_KLCONFIG_SIZE		0xc000
+#define IP27_KLCONFIG_COUNT		1
+#define IP27_KLCONFIG_STRIDE		0
+
+#define IP27_NMI_OFFSET			0x3000
+#define IP27_NMI_SIZE			0x40
+#define IP27_NMI_COUNT			2
+#define IP27_NMI_STRIDE			0x40
+
+#define IP27_PI_ERROR_OFFSET		0x12000
+#define IP27_PI_ERROR_SIZE		0x4000
+#define IP27_PI_ERROR_COUNT		1
+#define IP27_PI_ERROR_STRIDE		0
+
+#define IP27_SYMMON_STK_OFFSET		0x25000
+#define IP27_SYMMON_STK_SIZE		0xe000
+#define IP27_SYMMON_STK_COUNT		2
+/* IP27_SYMMON_STK_STRIDE must be >= SYMMON_STACK_SIZE */
+#define IP27_SYMMON_STK_STRIDE		0x7000
+
+#define IP27_FREEMEM_OFFSET		0x19000
+#define IP27_FREEMEM_SIZE		-1
+#define IP27_FREEMEM_COUNT		1
+#define IP27_FREEMEM_STRIDE		0
+
+#endif /* PROM */
+/*
+ * There will be only one of these in a partition so the IO6 must set it up.
+ */
+#define IO6_GDA_OFFSET			0x11000
+#define IO6_GDA_SIZE			0x400
+#define IO6_GDA_COUNT			1
+#define IO6_GDA_STRIDE			0
+
+/*
+ * save area of kernel nmi regs in the prom format
+ */
+#define IP27_NMI_KREGS_OFFSET		0x11400
+#define IP27_NMI_KREGS_CPU_SIZE		0x200
+/*
+ * save area of kernel nmi regs in eframe format
+ */
+#define IP27_NMI_EFRAME_OFFSET		0x11800
+#define IP27_NMI_EFRAME_SIZE		0x200
+
+#endif /* _ASM_SN_SN0_KLDIR_H */

arch/mips/include/asm/sn/sn_private.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ASM_SN_SN_PRIVATE_H
-#define __ASM_SN_SN_PRIVATE_H
-
-#include <asm/sn/types.h>
-
-extern nasid_t master_nasid;
-
-extern void cpu_node_probe(void);
-extern void hub_rtc_init(nasid_t nasid);
-extern void cpu_time_init(void);
-extern void per_cpu_init(void);
-extern void install_cpu_nmi_handler(int slice);
-extern void install_ipi(void);
-extern void setup_replication_mask(void);
-extern void replicate_kernel_text(void);
-extern unsigned long node_getfirstfree(nasid_t nasid);
-
-#endif /* __ASM_SN_SN_PRIVATE_H */

arch/mips/include/asm/sn/types.h

···
 
 #include <linux/types.h>
 
+#ifndef __ASSEMBLY__
+
 typedef unsigned long	cpuid_t;
 typedef signed short	nasid_t;	/* node id in numa-as-id space */
 typedef signed char	partid_t;	/* partition ID type */
 typedef signed short	moduleid_t;	/* user-visible module number type */
 
 typedef dev_t		vertex_hdl_t;	/* hardware graph vertex handle */
+
+#endif
 
 #endif /* _ASM_SN_TYPES_H */

arch/mips/jz4740/Kconfig

···
 	bool "MIPS Creator CI20"
 	select MACH_JZ4780
 
+config X1000_CU1000_NEO
+	bool "YSH & ATIL CU1000 Module with Neo backplane"
+	select MACH_X1000
+
 endchoice
 
 config MACH_JZ4740
···
 	select SYS_SUPPORTS_HIGHMEM
 
 config MACH_JZ4780
+	bool
+	select MIPS_CPU_SCACHE
+	select SYS_HAS_CPU_MIPS32_R2
+	select SYS_SUPPORTS_HIGHMEM
+
+config MACH_X1000
 	bool
 	select MIPS_CPU_SCACHE
 	select SYS_HAS_CPU_MIPS32_R2

arch/mips/jz4740/setup.c

···
 
 static unsigned long __init get_board_mach_type(const void *fdt)
 {
+	if (!fdt_node_check_compatible(fdt, 0, "ingenic,x1830"))
+		return MACH_INGENIC_X1830;
 	if (!fdt_node_check_compatible(fdt, 0, "ingenic,x1000"))
 		return MACH_INGENIC_X1000;
 	if (!fdt_node_check_compatible(fdt, 0, "ingenic,jz4780"))
···
 const char *get_system_type(void)
 {
 	switch (mips_machtype) {
+	case MACH_INGENIC_X1830:
+		return "X1830";
 	case MACH_INGENIC_X1000:
 		return "X1000";
 	case MACH_INGENIC_JZ4780:

arch/mips/kernel/cpu-probe.c

···
 		if (fir & MIPS_FPIR_HAS2008) {
 			fcsr = read_32bit_cp1_register(CP1_STATUS);
 
-			fcsr0 = fcsr & ~(FPU_CSR_ABS2008 | FPU_CSR_NAN2008);
+			/*
+			 * MAC2008 toolchain never landed in real world, so we're only
+			 * testing wether it can be disabled and don't try to enabled
+			 * it.
+			 */
+			fcsr0 = fcsr & ~(FPU_CSR_ABS2008 | FPU_CSR_NAN2008 | FPU_CSR_MAC2008);
 			write_32bit_cp1_register(CP1_STATUS, fcsr0);
 			fcsr0 = read_32bit_cp1_register(CP1_STATUS);
 
···
 			fcsr1 = read_32bit_cp1_register(CP1_STATUS);
 
 			write_32bit_cp1_register(CP1_STATUS, fcsr);
+
+			if (c->isa_level & (MIPS_CPU_ISA_M32R2 | MIPS_CPU_ISA_M64R2)) {
+				/*
+				 * The bit for MAC2008 might be reused by R6 in future,
+				 * so we only test for R2-R5.
+				 */
+				if (fcsr0 & FPU_CSR_MAC2008)
+					c->options |= MIPS_CPU_MAC_2008_ONLY;
+			}
 
 			if (!(fcsr0 & FPU_CSR_NAN2008))
 				c->options |= MIPS_CPU_NAN_LEGACY;
···
 	BUG_ON(!__builtin_constant_p(cpu_has_counter) || cpu_has_counter);
 
 	switch (c->processor_id & PRID_IMP_MASK) {
-	case PRID_IMP_XBURST:
-		c->cputype = CPU_XBURST;
-		c->writecombine = _CACHE_UNCACHED_ACCELERATED;
-		__cpu_name[cpu] = "Ingenic JZRISC";
+	case PRID_IMP_XBURST_REV1:
+
 		/*
 		 * The XBurst core by default attempts to avoid branch target
 		 * buffer lookups by detecting & special casing loops. This
···
 		 * Set cp0 config7 bit 4 to disable this feature.
 		 */
 		set_c0_config7(MIPS_CONF7_BTB_LOOP_EN);
+
+		switch (c->processor_id & PRID_COMP_MASK) {
+
+		/*
+		 * The config0 register in the XBurst CPUs with a processor ID of
+		 * PRID_COMP_INGENIC_D0 report themselves as MIPS32r2 compatible,
+		 * but they don't actually support this ISA.
+		 */
+		case PRID_COMP_INGENIC_D0:
+			c->isa_level &= ~MIPS_CPU_ISA_M32R2;
+			break;
+
+		/*
+		 * The config0 register in the XBurst CPUs with a processor ID of
+		 * PRID_COMP_INGENIC_D1 has an abandoned huge page tlb mode, this
+		 * mode is not compatible with the MIPS standard, it will cause
+		 * tlbmiss and into an infinite loop (line 21 in the tlb-funcs.S)
+		 * when starting the init process. After chip reset, the default
+		 * is HPTLB mode, Write 0xa9000000 to cp0 register 5 sel 4 to
+		 * switch back to VTLB mode to prevent getting stuck.
+		 */
+		case PRID_COMP_INGENIC_D1:
+			write_c0_page_ctrl(XBURST_PAGECTRL_HPTLB_DIS);
+			break;
+
+		default:
+			break;
+		}
+	/* fall-through */
+	case PRID_IMP_XBURST_REV2:
+		c->cputype = CPU_XBURST;
+		c->writecombine = _CACHE_UNCACHED_ACCELERATED;
+		__cpu_name[cpu] = "Ingenic XBurst";
 		break;
+
 	default:
 		panic("Unknown Ingenic Processor ID!");
-		break;
-	}
-
-	switch (c->processor_id & PRID_COMP_MASK) {
-	/*
-	 * The config0 register in the XBurst CPUs with a processor ID of
-	 * PRID_COMP_INGENIC_D1 has an abandoned huge page tlb mode, this
-	 * mode is not compatible with the MIPS standard, it will cause
-	 * tlbmiss and into an infinite loop (line 21 in the tlb-funcs.S)
-	 * when starting the init process. After chip reset, the default
-	 * is HPTLB mode, Write 0xa9000000 to cp0 register 5 sel 4 to
-	 * switch back to VTLB mode to prevent getting stuck.
-	 */
-	case PRID_COMP_INGENIC_D1:
-		write_c0_page_ctrl(XBURST_PAGECTRL_HPTLB_DIS);
-		break;
-	/*
-	 * The config0 register in the XBurst CPUs with a processor ID of
-	 * PRID_COMP_INGENIC_D0 report themselves as MIPS32r2 compatible,
-	 * but they don't actually support this ISA.
-	 */
-	case PRID_COMP_INGENIC_D0:
-		c->isa_level &= ~MIPS_CPU_ISA_M32R2;
-		break;
-	default:
 		break;
 	}
 }

arch/mips/kernel/setup.c

···
 	ret = request_resource(res, &crashk_res);
 	if (!ret)
 		pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n",
-			(unsigned long)((crashk_res.end -
-					 crashk_res.start + 1) >> 20),
+			(unsigned long)(resource_size(&crashk_res) >> 20),
 			(unsigned long)(crashk_res.start  >> 20));
 }
 #else /* !defined(CONFIG_KEXEC)		*/
···
 	mips_parse_crashkernel();
 #ifdef CONFIG_KEXEC
 	if (crashk_res.start != crashk_res.end)
-		memblock_reserve(crashk_res.start,
-				 crashk_res.end - crashk_res.start + 1);
+		memblock_reserve(crashk_res.start, resource_size(&crashk_res));
 #endif
 	device_tree_init();
 	sparse_init();

arch/mips/kernel/sync-r4k.c

···
 void synchronise_count_slave(int cpu)
 {
 	int i;
+	unsigned long flags;
+
+	local_irq_save(flags);
 
 	/*
 	 * Not every cpu is online at the time this gets called,
···
 	}
 	/* Arrange for an interrupt in a short while */
 	write_c0_compare(read_c0_count() + COUNTON);
+
+	local_irq_restore(flags);
 }
 #undef NR_LOOPS

arch/mips/kernel/syscalls/Makefile

···
 		   '$(syshdr_pfx_$(basetarget))'		\
 		   '$(syshdr_offset_$(basetarget))'
 
-quiet_cmd_sysnr = SYSNR  $@
+quiet_cmd_sysnr = SYSNR   $@
       cmd_sysnr = $(CONFIG_SHELL) '$(sysnr)' '$<' '$@'		\
 		  '$(sysnr_abis_$(basetarget))'			\
 		  '$(sysnr_pfx_$(basetarget))'			\

arch/mips/kernel/unaligned.c

···
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
+#ifndef CONFIG_CPU_NO_LOAD_STORE_LR
 #define     _LoadW(addr, value, res, type)   \
 do {                                                        \
 		__asm__ __volatile__ (                      \
···
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#else /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#else /* CONFIG_CPU_NO_LOAD_STORE_LR */
 /* For CPUs without lwl instruction */
 #define     _LoadW(addr, value, res, type) \
 do {                                                        \
···
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#endif /* CONFIG_CPU_NO_LOAD_STORE_LR */
 
 #define     _LoadHWU(addr, value, res, type) \
 do {                                                        \
···
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
+#ifndef CONFIG_CPU_NO_LOAD_STORE_LR
 #define     _LoadWU(addr, value, res, type)  \
 do {                                                        \
 		__asm__ __volatile__ (                      \
···
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#else /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#else /* CONFIG_CPU_NO_LOAD_STORE_LR */
 /* For CPUs without lwl and ldl instructions */
 #define	    _LoadWU(addr, value, res, type) \
 do {                                                        \
···
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#endif /* CONFIG_CPU_NO_LOAD_STORE_LR */
 
 
 #define     _StoreHW(addr, value, res, type) \
···
 			: "r" (value), "r" (addr), "i" (-EFAULT));\
 } while(0)
 
-#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
+#ifndef CONFIG_CPU_NO_LOAD_STORE_LR
 #define     _StoreW(addr, value, res, type)  \
 do {                                                        \
 		__asm__ __volatile__ (                      \
···
 		: "r" (value), "r" (addr), "i" (-EFAULT));  \
 } while(0)
 
-#else /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#else /* CONFIG_CPU_NO_LOAD_STORE_LR */
 #define     _StoreW(addr, value, res, type)  \
 do {                                                        \
 		__asm__ __volatile__ (                      \
···
 		: "memory");                                \
 } while(0)
 
-#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#endif /* CONFIG_CPU_NO_LOAD_STORE_LR */
 
 #else /* __BIG_ENDIAN */
 
···
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
+#ifndef CONFIG_CPU_NO_LOAD_STORE_LR
 #define     _LoadW(addr, value, res, type)   \
 do {                                                        \
 		__asm__ __volatile__ (                      \
···
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#else  /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#else /* CONFIG_CPU_NO_LOAD_STORE_LR */
 /* For CPUs without lwl instruction */
 #define     _LoadW(addr, value, res, type) \
 do {                                                        \
···
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#endif /* CONFIG_CPU_NO_LOAD_STORE_LR */
 
 
 #define     _LoadHWU(addr, value, res, type) \
···
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
+#ifndef CONFIG_CPU_NO_LOAD_STORE_LR
 #define     _LoadWU(addr, value, res, type)  \
 do {                                                        \
 		__asm__ __volatile__ (                      \
···
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#else /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#else /* CONFIG_CPU_NO_LOAD_STORE_LR */
 /* For CPUs without lwl and ldl instructions */
 #define	    _LoadWU(addr, value, res, type) \
 do {                                                        \
···
 			: "=&r" (value), "=r" (res)	    \
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
-#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#endif /* CONFIG_CPU_NO_LOAD_STORE_LR */
 
 #define     _StoreHW(addr, value, res, type) \
 do {                                                        \
···
 			: "r" (value), "r" (addr), "i" (-EFAULT));\
 } while(0)
 
-#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
+#ifndef CONFIG_CPU_NO_LOAD_STORE_LR
 #define     _StoreW(addr, value, res, type)  \
 do {                                                        \
 		__asm__ __volatile__ (                      \
···
 		: "r" (value), "r" (addr), "i" (-EFAULT));  \
 } while(0)
 
-#else /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#else /* CONFIG_CPU_NO_LOAD_STORE_LR */
 /* For CPUs without swl and sdl instructions */
 #define     _StoreW(addr, value, res, type)  \
 do {                                                        \
···
 		: "memory");                                \
 } while(0)
 
-#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#endif /* CONFIG_CPU_NO_LOAD_STORE_LR */
 #endif
 
 #define LoadHWU(addr, value, res)	_LoadHWU(addr, value, res, kernel)

arch/mips/lib/memcpy.S

···
 	 and	t0, src, ADDRMASK
 	PREFS(	0, 2*32(src) )
 	PREFD(	1, 2*32(dst) )
-#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
+#ifndef CONFIG_CPU_NO_LOAD_STORE_LR
 	bnez	t1, .Ldst_unaligned\@
 	 nop
 	bnez	t0, .Lsrc_unaligned_dst_aligned\@
-#else
+#else /* CONFIG_CPU_NO_LOAD_STORE_LR */
 	or	t0, t0, t1
 	bnez	t0, .Lcopy_unaligned_bytes\@
-#endif
+#endif /* CONFIG_CPU_NO_LOAD_STORE_LR */
 	/*
 	 * use delay slot for fall-through
 	 * src and dst are aligned; need to compute rem
···
 	bne	rem, len, 1b
 	.set	noreorder
 
-#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
+#ifndef CONFIG_CPU_NO_LOAD_STORE_LR
 	/*
 	 * src and dst are aligned, need to copy rem bytes (rem < NBYTES)
 	 * A loop would do only a byte at a time with possible branch
···
 	bne	len, rem, 1b
 	.set	noreorder
 
-#endif /* CONFIG_CPU_HAS_LOAD_STORE_LR */
+#endif /* !CONFIG_CPU_NO_LOAD_STORE_LR */
 .Lcopy_bytes_checklen\@:
 	beqz	len, .Ldone\@
 	 nop
···
 	jr	ra
 	 nop
 
-#ifndef CONFIG_CPU_HAS_LOAD_STORE_LR
+#ifdef CONFIG_CPU_NO_LOAD_STORE_LR
 .Lcopy_unaligned_bytes\@:
 1:
 	COPY_BYTE(0)
···
 	ADD	src, src, 8
 	b	1b
 	 ADD	dst, dst, 8
-#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#endif /* CONFIG_CPU_NO_LOAD_STORE_LR */
 	.if __memcpy == 1
 	END(memcpy)
 	.set __memcpy, 0

arch/mips/lib/memset.S

···
 #endif
 	.set		reorder
 
-#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
+#ifndef CONFIG_CPU_NO_LOAD_STORE_LR
 	R10KCBARRIER(0(ra))
 #ifdef __MIPSEB__
 	EX(LONG_S_L, a1, (a0), .Lfirst_fixup\@)	/* make word/dword aligned */
···
 	PTR_SUBU	a0, t0			/* long align ptr */
 	PTR_ADDU	a2, t0			/* correct size */
 
-#else /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#else /* CONFIG_CPU_NO_LOAD_STORE_LR */
 #define STORE_BYTE(N)				\
 	EX(sb, a1, N(a0), .Lbyte_fixup\@);	\
 	.set		noreorder;		\
···
 	ori		a0, STORMASK
 	xori		a0, STORMASK
 	PTR_ADDIU	a0, STORSIZE
-#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#endif /* CONFIG_CPU_NO_LOAD_STORE_LR */
 1:	ori		t1, a2, 0x3f		/* # of full blocks */
 	xori		t1, 0x3f
 	andi		t0, a2, 0x40-STORSIZE
···
 
 	.set		noreorder
 	beqz		a2, 1f
-#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
+#ifndef CONFIG_CPU_NO_LOAD_STORE_LR
 	 PTR_ADDU	a0, a2			/* What's left */
 	.set		reorder
 	R10KCBARRIER(0(ra))
···
 #else
 	EX(LONG_S_L, a1, -1(a0), .Llast_fixup\@)
 #endif
-#else
+#else /* CONFIG_CPU_NO_LOAD_STORE_LR */
 	 PTR_SUBU	t0, $0, a2
 	.set		reorder
 	move		a2, zero		/* No remaining longs */
···
 	EX(sb, a1, 6(a0), .Lbyte_fixup\@)
 #endif
 0:
-#endif
+#endif /* CONFIG_CPU_NO_LOAD_STORE_LR */
 1:	move		a2, zero
 	jr		ra
 
···
 	.hidden __memset
 	.endif
 
-#ifndef CONFIG_CPU_HAS_LOAD_STORE_LR
+#ifdef CONFIG_CPU_NO_LOAD_STORE_LR
 .Lbyte_fixup\@:
 	/*
 	 * unset_bytes = (#bytes - (#unaligned bytes)) - (-#unaligned bytes remaining + 1) + 1
···
 	PTR_SUBU	a2, t0
 	PTR_ADDIU	a2, 1
 	jr		ra
-#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+#endif /* CONFIG_CPU_NO_LOAD_STORE_LR */
 
 .Lfirst_fixup\@:
 	/* unset_bytes already in a2 */

arch/mips/lib/mips-atomic.c

···
 #include <linux/export.h>
 #include <linux/stringify.h>
 
-#if !defined(CONFIG_CPU_MIPSR2) && !defined(CONFIG_CPU_MIPSR6)
+#if !defined(CONFIG_CPU_HAS_DIEI)
 
 /*
  * For cli() we have to insert nops to make sure that the new value
···
 }
 EXPORT_SYMBOL(arch_local_irq_restore);
 
-#endif /* !CONFIG_CPU_MIPSR2 && !CONFIG_CPU_MIPSR6 */
+#endif /* !CONFIG_CPU_HAS_DIEI */

arch/mips/loongson2ef/common/pm.c

···
 
 static void loongson_suspend_enter(void)
 {
-	static unsigned int cached_cpu_freq;
+	unsigned int cached_cpu_freq;
 
 	/* setup wakeup events via enabling the IRQs */
 	setup_wakeup_events();

arch/mips/loongson64/numa.c

···
 				loongson_sysconf.cores_per_package;
 
 	if (col == row)
-		return 0;
+		return LOCAL_DISTANCE;
 	else if (package_row == package_col)
 		return 40;
 	else

arch/mips/loongson64/platform.c

···
 			continue;
 
 		pdev = kzalloc(sizeof(struct platform_device), GFP_KERNEL);
+		if (!pdev)
+			return -ENOMEM;
+
 		pdev->name = loongson_sysconf.sensors[i].name;
 		pdev->id = loongson_sysconf.sensors[i].id;
 		pdev->dev.platform_data = &loongson_sysconf.sensors[i];

arch/mips/math-emu/cp1emu.c

···
 			break;
 
 		case madd_s_op:
-			handler = fpemu_sp_madd;
+			if (cpu_has_mac2008_only)
+				handler = ieee754sp_madd;
+			else
+				handler = fpemu_sp_madd;
 			goto scoptop;
 		case msub_s_op:
-			handler = fpemu_sp_msub;
+			if (cpu_has_mac2008_only)
+				handler = ieee754sp_msub;
+			else
+				handler = fpemu_sp_msub;
 			goto scoptop;
 		case nmadd_s_op:
-			handler = fpemu_sp_nmadd;
+			if (cpu_has_mac2008_only)
+				handler = ieee754sp_nmadd;
+			else
+				handler = fpemu_sp_nmadd;
 			goto scoptop;
 		case nmsub_s_op:
-			handler = fpemu_sp_nmsub;
+			if (cpu_has_mac2008_only)
+				handler = ieee754sp_nmsub;
+			else
+				handler = fpemu_sp_nmsub;
 			goto scoptop;
 
 		      scoptop:
···
 			break;
 
 		case madd_d_op:
-			handler = fpemu_dp_madd;
+			if (cpu_has_mac2008_only)
+				handler = ieee754dp_madd;
+			else
+				handler = fpemu_dp_madd;
 			goto dcoptop;
 		case msub_d_op:
-			handler = fpemu_dp_msub;
+			if (cpu_has_mac2008_only)
+				handler = ieee754dp_msub;
+			else
+				handler = fpemu_dp_msub;
 			goto dcoptop;
 		case nmadd_d_op:
-			handler = fpemu_dp_nmadd;
+			if (cpu_has_mac2008_only)
+				handler = ieee754dp_nmadd;
+			else
+				handler = fpemu_dp_nmadd;
 			goto dcoptop;
 		case nmsub_d_op:
+			if (cpu_has_mac2008_only)
+				handler = ieee754dp_nmsub;
+			else
 			handler = fpemu_dp_nmsub;
 			goto dcoptop;
 

arch/mips/math-emu/dp_maddf.c

···
 
 	ieee754_clearcx();
 
+	rs = xs ^ ys;
+	if (flags & MADDF_NEGATE_PRODUCT)
+		rs ^= 1;
+	if (flags & MADDF_NEGATE_ADDITION)
+		zs ^= 1;
+
 	/*
 	 * Handle the cases when at least one of x, y or z is a NaN.
 	 * Order of precedence is sNaN, qNaN and z, x, y.
···
 	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_NORM):
 	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_DNORM):
 	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_INF):
-		if ((zc == IEEE754_CLASS_INF) &&
-		    ((!(flags & MADDF_NEGATE_PRODUCT) && (zs != (xs ^ ys))) ||
-		     ((flags & MADDF_NEGATE_PRODUCT) && (zs == (xs ^ ys))))) {
+		if ((zc == IEEE754_CLASS_INF) && (zs != rs)) {
 			/*
 			 * Cases of addition of infinities with opposite signs
 			 * or subtraction of infinities with same signs.
···
 		}
 		/*
 		 * z is here either not an infinity, or an infinity having the
-		 * same sign as product (x*y) (in case of MADDF.D instruction)
-		 * or product -(x*y) (in MSUBF.D case). The result must be an
-		 * infinity, and its sign is determined only by the value of
-		 * (flags & MADDF_NEGATE_PRODUCT) and the signs of x and y.
+		 * same sign as product (x*y). The result must be an infinity,
+		 * and its sign is determined only by the sign of product (x*y).
 		 */
-		if (flags & MADDF_NEGATE_PRODUCT)
-			return ieee754dp_inf(1 ^ (xs ^ ys));
-		else
-			return ieee754dp_inf(xs ^ ys);
+		return ieee754dp_inf(rs);
 
 	case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_ZERO):
 	case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_NORM):
···
 			return ieee754dp_inf(zs);
 		if (zc == IEEE754_CLASS_ZERO) {
 			/* Handle cases +0 + (-0) and similar ones. */
-			if ((!(flags & MADDF_NEGATE_PRODUCT)
-					&& (zs == (xs ^ ys))) ||
-			    ((flags & MADDF_NEGATE_PRODUCT)
-					&& (zs != (xs ^ ys))))
+			if (zs == rs)
 				/*
 				 * Cases of addition of zeros of equal signs
 				 * or subtraction of zeroes of opposite signs.
···
 	assert(ym & DP_HIDDEN_BIT);
 
 	re = xe + ye;
-	rs = xs ^ ys;
-	if (flags & MADDF_NEGATE_PRODUCT)
-		rs ^= 1;
 
 	/* shunt to top of word */
 	xm <<= 64 - (DP_FBITS + 1);
···
 }
 
 union ieee754dp ieee754dp_msubf(union ieee754dp z, union ieee754dp x,
+				union ieee754dp y)
+{
+	return _dp_maddf(z, x, y, MADDF_NEGATE_PRODUCT);
+}
+
+union ieee754dp ieee754dp_madd(union ieee754dp z, union ieee754dp x,
+				union ieee754dp y)
+{
+	return _dp_maddf(z, x, y, 0);
+}
+
+union ieee754dp ieee754dp_msub(union ieee754dp z, union ieee754dp x,
+				union ieee754dp y)
+{
+	return _dp_maddf(z, x, y, MADDF_NEGATE_ADDITION);
+}
+
+union ieee754dp ieee754dp_nmadd(union ieee754dp z, union ieee754dp x,
+				union ieee754dp y)
+{
+	return _dp_maddf(z, x, y, MADDF_NEGATE_PRODUCT|MADDF_NEGATE_ADDITION);
+}
+
+union ieee754dp ieee754dp_nmsub(union ieee754dp z, union ieee754dp x,
 				union ieee754dp y)
 {
 	return _dp_maddf(z, x, y, MADDF_NEGATE_PRODUCT);

arch/mips/math-emu/ieee754.h

···
 				union ieee754sp y);
 union ieee754sp ieee754sp_msubf(union ieee754sp z, union ieee754sp x,
 				union ieee754sp y);
+union ieee754sp ieee754sp_madd(union ieee754sp z, union ieee754sp x,
+				union ieee754sp y);
+union ieee754sp ieee754sp_msub(union ieee754sp z, union ieee754sp x,
+				union ieee754sp y);
+union ieee754sp ieee754sp_nmadd(union ieee754sp z, union ieee754sp x,
+				union ieee754sp y);
+union ieee754sp ieee754sp_nmsub(union ieee754sp z, union ieee754sp x,
+				union ieee754sp y);
 int ieee754sp_2008class(union ieee754sp x);
 union ieee754sp ieee754sp_fmin(union ieee754sp x, union ieee754sp y);
 union ieee754sp ieee754sp_fmina(union ieee754sp x, union ieee754sp y);
···
 union ieee754dp ieee754dp_maddf(union ieee754dp z, union ieee754dp x,
 				union ieee754dp y);
 union ieee754dp ieee754dp_msubf(union ieee754dp z, union ieee754dp x,
+				union ieee754dp y);
+union ieee754dp ieee754dp_madd(union ieee754dp z, union ieee754dp x,
+				union ieee754dp y);
+union ieee754dp ieee754dp_msub(union ieee754dp z, union ieee754dp x,
+				union ieee754dp y);
+union ieee754dp ieee754dp_nmadd(union ieee754dp z, union ieee754dp x,
+				union ieee754dp y);
+union ieee754dp ieee754dp_nmsub(union ieee754dp z, union ieee754dp x,
 				union ieee754dp y);
 int ieee754dp_2008class(union ieee754dp x);
 union ieee754dp ieee754dp_fmin(union ieee754dp x, union ieee754dp y);

arch/mips/math-emu/ieee754int.h

···
 
 enum maddf_flags {
 	MADDF_NEGATE_PRODUCT	= 1 << 0,
+	MADDF_NEGATE_ADDITION	= 1 << 1,
 };
 
 static inline void ieee754_clearcx(void)

arch/mips/math-emu/sp_maddf.c

···
 
 	ieee754_clearcx();
 
+	rs = xs ^ ys;
+	if (flags & MADDF_NEGATE_PRODUCT)
+		rs ^= 1;
+	if (flags & MADDF_NEGATE_ADDITION)
+		zs ^= 1;
+
 	/*
 	 * Handle the cases when at least one of x, y or z is a NaN.
 	 * Order of precedence is sNaN, qNaN and z, x, y.
···
 	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_NORM):
 	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_DNORM):
 	case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_INF):
-		if ((zc == IEEE754_CLASS_INF) &&
-		    ((!(flags & MADDF_NEGATE_PRODUCT) && (zs != (xs ^ ys))) ||
-		     ((flags & MADDF_NEGATE_PRODUCT) && (zs == (xs ^ ys))))) {
+		if ((zc == IEEE754_CLASS_INF) && (zs != rs)) {
 			/*
 			 * Cases of addition of infinities with opposite signs
 			 * or subtraction of infinities with same signs.
···
 		}
 		/*
 		 * z is here either not an infinity, or an infinity having the
-		 * same sign as product (x*y) (in case of MADDF.D instruction)
-		 * or product -(x*y) (in MSUBF.D case). The result must be an
-		 * infinity, and its sign is determined only by the value of
-		 * (flags & MADDF_NEGATE_PRODUCT) and the signs of x and y.
+		 * same sign as product (x*y). The result must be an infinity,
+		 * and its sign is determined only by the sign of product (x*y).
 		 */
-		if (flags & MADDF_NEGATE_PRODUCT)
-			return ieee754sp_inf(1 ^ (xs ^ ys));
-		else
-			return ieee754sp_inf(xs ^ ys);
+		return ieee754sp_inf(rs);
 
 	case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_ZERO):
 	case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_NORM):
···
 			return ieee754sp_inf(zs);
 		if (zc == IEEE754_CLASS_ZERO) {
 			/* Handle cases +0 + (-0) and similar ones. */
-			if ((!(flags & MADDF_NEGATE_PRODUCT)
-					&& (zs == (xs ^ ys))) ||
-			    ((flags & MADDF_NEGATE_PRODUCT)
-					&& (zs != (xs ^ ys))))
+			if (zs == rs)
 				/*
 				 * Cases of addition of zeros of equal signs
 				 * or subtraction of zeroes of opposite signs.
···
 	assert(ym & SP_HIDDEN_BIT);
 
 	re = xe + ye;
-	rs = xs ^ ys;
-	if (flags & MADDF_NEGATE_PRODUCT)
-		rs ^= 1;
 
 	/* Multiple 24 bit xm and ym to give 48 bit results */
 	rm64 = (uint64_t)xm * ym;
···
 }
 
 union ieee754sp ieee754sp_msubf(union ieee754sp z, union ieee754sp x,
+				union ieee754sp y)
+{
+	return _sp_maddf(z, x, y, MADDF_NEGATE_PRODUCT);
+}
+
+union ieee754sp ieee754sp_madd(union ieee754sp z, union ieee754sp x,
+				union ieee754sp y)
+{
+	return _sp_maddf(z, x, y, 0);
+}
+
+union ieee754sp ieee754sp_msub(union ieee754sp z, union ieee754sp x,
+				union ieee754sp y)
+{
+	return _sp_maddf(z, x, y, MADDF_NEGATE_ADDITION);
+}
+
+union ieee754sp ieee754sp_nmadd(union ieee754sp z, union ieee754sp x,
+				union ieee754sp y)
+{
+	return _sp_maddf(z, x, y, MADDF_NEGATE_PRODUCT|MADDF_NEGATE_ADDITION);
+}
+
+union ieee754sp ieee754sp_nmsub(union ieee754sp z, union ieee754sp x,
 				union ieee754sp y)
 {
 	return _sp_maddf(z, x, y, MADDF_NEGATE_PRODUCT);

arch/mips/mm/init.c

···
 		free_initmem_default(POISON_FREE_INITMEM);
 }
 
+#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
+unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
+EXPORT_SYMBOL(__per_cpu_offset);
+
+static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
+{
+	return node_distance(cpu_to_node(from), cpu_to_node(to));
+}
+
+static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size,
+				       size_t align)
+{
+	return memblock_alloc_try_nid(size, align, __pa(MAX_DMA_ADDRESS),
+				      MEMBLOCK_ALLOC_ACCESSIBLE,
+				      cpu_to_node(cpu));
+}
+
+static void __init pcpu_fc_free(void *ptr, size_t size)
+{
+	memblock_free_early(__pa(ptr), size);
+}
+
+void __init setup_per_cpu_areas(void)
+{
+	unsigned long delta;
+	unsigned int cpu;
+	int rc;
+
+	/*
+	 * Always reserve area for module percpu variables.  That's
+	 * what the legacy allocator did.
+	 */
+	rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
+				    PERCPU_DYNAMIC_RESERVE, PAGE_SIZE,
+				    pcpu_cpu_distance,
+				    pcpu_fc_alloc, pcpu_fc_free);
+	if (rc < 0)
+		panic("Failed to initialize percpu areas.");
+
+	delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start;
+	for_each_possible_cpu(cpu)
+		__per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu];
+}
+#endif
+
 #ifndef CONFIG_MIPS_PGD_C0_CONTEXT
 unsigned long pgd_current[NR_CPUS];
 #endif

arch/mips/net/Makefile

···
 # SPDX-License-Identifier: GPL-2.0-only
 # MIPS networking code
 
+obj-$(CONFIG_MIPS_CBPF_JIT) += bpf_jit.o bpf_jit_asm.o
 obj-$(CONFIG_MIPS_EBPF_JIT) += ebpf_jit.o

arch/mips/net/bpf_jit.c

···
+/*
+ * Just-In-Time compiler for BPF filters on MIPS
+ *
+ * Copyright (c) 2014 Imagination Technologies Ltd.
+ * Author: Markos Chandras <[e-mail]>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2 of the License.
+ */
+
+#include <linux/bitops.h>
+#include <linux/compiler.h>
+#include <linux/errno.h>
+#include <linux/filter.h>
+#include <linux/if_vlan.h>
+#include <linux/moduleloader.h>
+#include <linux/netdevice.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <asm/asm.h>
+#include <asm/bitops.h>
+#include <asm/cacheflush.h>
+#include <asm/cpu-features.h>
+#include <asm/uasm.h>
+
+#include "bpf_jit.h"
+
+/* ABI
+ * r_skb_hl	SKB header length
+ * r_data	SKB data pointer
+ * r_off	Offset
+ * r_A		BPF register A
+ * r_X		BPF register X
+ * r_skb	*skb
+ * r_M		*scratch memory
+ * r_skb_len	SKB length
+ *
+ * On entry (*bpf_func)(*skb, *filter)
+ * a0 = MIPS_R_A0 = skb;
+ * a1 = MIPS_R_A1 = filter;
+ *
+ * Stack
+ * ...
+ * M[15]
+ * M[14]
+ * M[13]
+ * ...
+ * M[0] <-- r_M
+ * saved reg k-1
+ * saved reg k-2
+ * ...
+ * saved reg 0 <-- r_sp
+ * <no argument area>
+ *
+ *                     Packet layout
+ *
+ * <--------------------- len ------------------------>
+ * <--skb-len(r_skb_hl)-->< ----- skb->data_len ------>
+ * ----------------------------------------------------
+ * |                  skb->data                       |
+ * ----------------------------------------------------
+ */
+
+#define ptr typeof(unsigned long)
+
+#define SCRATCH_OFF(k)		(4 * (k))
+
+/* JIT flags */
+#define SEEN_CALL		(1 << BPF_MEMWORDS)
+#define SEEN_SREG_SFT		(BPF_MEMWORDS + 1)
+#define SEEN_SREG_BASE		(1 << SEEN_SREG_SFT)
+#define SEEN_SREG(x)		(SEEN_SREG_BASE << (x))
+#define SEEN_OFF		SEEN_SREG(2)
+#define SEEN_A			SEEN_SREG(3)
+#define SEEN_X			SEEN_SREG(4)
+#define SEEN_SKB		SEEN_SREG(5)
+#define SEEN_MEM		SEEN_SREG(6)
+/* SEEN_SK_DATA also implies skb_hl an skb_len */
+#define SEEN_SKB_DATA		(SEEN_SREG(7) | SEEN_SREG(1) | SEEN_SREG(0))
+
+/* Arguments used by JIT */
+#define ARGS_USED_BY_JIT	2 /* only applicable to 64-bit */
+
+#define SBIT(x)			(1 << (x)) /* Signed version of BIT() */
+
+/**
+ * struct jit_ctx - JIT context
+ * @skf:		The sk_filter
+ * @prologue_bytes:	Number of bytes for prologue
+ * @idx:		Instruction index
+ * @flags:		JIT flags
+ * @offsets:		Instruction offsets
+ * @target:		Memory location for the compiled filter
+ */
+struct jit_ctx {
+	const struct bpf_prog *skf;
+	unsigned int prologue_bytes;
+	u32 idx;
+	u32 flags;
+	u32 *offsets;
+	u32 *target;
+};
+
+
+static inline int optimize_div(u32 *k)
+{
+	/* power of 2 divides can be implemented with right shift */
+	if (!(*k & (*k-1))) {
+		*k = ilog2(*k);
+		return 1;
+	}
+
+	return 0;
+}
+
+static inline void emit_jit_reg_move(ptr dst, ptr src, struct jit_ctx *ctx);
+
+/* Simply emit the instruction if the JIT memory space has been allocated */
+#define emit_instr(ctx, func, ...)			\
+do {							\
+	if ((ctx)->target != NULL) {			\
+		u32 *p = &(ctx)->target[ctx->idx];	\
+		uasm_i_##func(&p, ##__VA_ARGS__);	\
+	}						\
+	(ctx)->idx++;					\
+} while (0)
+
+/*
+ * Similar to emit_instr but it must be used when we need to emit
+ * 32-bit or 64-bit instructions
+ */
+#define emit_long_instr(ctx, func, ...)			\
+do {							\
+	if ((ctx)->target != NULL) {			\
+		u32 *p = &(ctx)->target[ctx->idx];	\
+		UASM_i_##func(&p, ##__VA_ARGS__);	\
+	}						\
+	(ctx)->idx++;					\
+} while (0)
+
+/* Determine if immediate is within the 16-bit signed range */
+static inline bool is_range16(s32 imm)
+{
+	return !(imm >= SBIT(15) || imm < -SBIT(15));
+}
+
+static inline void emit_addu(unsigned int dst, unsigned int src1,
+			     unsigned int src2, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, addu, dst, src1, src2);
+}
+
+static inline void emit_nop(struct jit_ctx *ctx)
+{
+	emit_instr(ctx, nop);
+}
+
+/* Load a u32 immediate to a register */
+static inline void emit_load_imm(unsigned int dst, u32 imm, struct jit_ctx *ctx)
+{
+	if (ctx->target != NULL) {
+		/* addiu can only handle s16 */
+		if (!is_range16(imm)) {
+			u32 *p = &ctx->target[ctx->idx];
+			uasm_i_lui(&p, r_tmp_imm, (s32)imm >> 16);
+			p = &ctx->target[ctx->idx + 1];
+			uasm_i_ori(&p, dst, r_tmp_imm, imm & 0xffff);
+		} else {
+			u32 *p = &ctx->target[ctx->idx];
+			uasm_i_addiu(&p, dst, r_zero, imm);
+		}
+	}
+	ctx->idx++;
+
+	if (!is_range16(imm))
+		ctx->idx++;
+}
+
+static inline void emit_or(unsigned int dst, unsigned int src1,
+			   unsigned int src2, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, or, dst, src1, src2);
+}
+
+static inline void emit_ori(unsigned int dst, unsigned src, u32 imm,
+			    struct jit_ctx *ctx)
+{
+	if (imm >= BIT(16)) {
+		emit_load_imm(r_tmp, imm, ctx);
+		emit_or(dst, src, r_tmp, ctx);
+	} else {
+		emit_instr(ctx, ori, dst, src, imm);
+	}
+}
+
+static inline void emit_daddiu(unsigned int dst, unsigned int src,
+			       int imm, struct jit_ctx *ctx)
+{
+	/*
+	 * Only used for stack, so the imm is relatively small
+	 * and it fits in 15-bits
+	 */
+	emit_instr(ctx, daddiu, dst, src, imm);
+}
+
+static inline void emit_addiu(unsigned int dst, unsigned int src,
+			      u32 imm, struct jit_ctx *ctx)
+{
+	if (!is_range16(imm)) {
+		emit_load_imm(r_tmp, imm, ctx);
+		emit_addu(dst, r_tmp, src, ctx);
+	} else {
+		emit_instr(ctx, addiu, dst, src, imm);
+	}
+}
+
+static inline void emit_and(unsigned int dst, unsigned int src1,
+			    unsigned int src2, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, and, dst, src1, src2);
+}
+
+static inline void emit_andi(unsigned int dst, unsigned int src,
+			     u32 imm, struct jit_ctx *ctx)
+{
+	/* If imm does not fit in u16 then load it to register */
+	if (imm >= BIT(16)) {
+		emit_load_imm(r_tmp, imm, ctx);
+		emit_and(dst, src, r_tmp, ctx);
+	} else {
+		emit_instr(ctx, andi, dst, src, imm);
+	}
+}
+
+static inline void emit_xor(unsigned int dst, unsigned int src1,
+			    unsigned int src2, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, xor, dst, src1, src2);
+}
+
+static inline void emit_xori(ptr dst, ptr src, u32 imm, struct jit_ctx *ctx)
+{
+	/* If imm does not fit in u16 then load it to register */
+	if (imm >= BIT(16)) {
+		emit_load_imm(r_tmp, imm, ctx);
+		emit_xor(dst, src, r_tmp, ctx);
+	} else {
+		emit_instr(ctx, xori, dst, src, imm);
+	}
+}
+
+static inline void emit_stack_offset(int offset, struct jit_ctx *ctx)
+{
+	emit_long_instr(ctx, ADDIU, r_sp, r_sp, offset);
+}
+
+static inline void emit_subu(unsigned int dst, unsigned int src1,
+			     unsigned int src2, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, subu, dst, src1, src2);
+}
+
+static inline void emit_neg(unsigned int reg, struct jit_ctx *ctx)
+{
+	emit_subu(reg, r_zero, reg, ctx);
+}
+
+static inline void emit_sllv(unsigned int dst, unsigned int src,
+			     unsigned int sa, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, sllv, dst, src, sa);
+}
+
+static inline void emit_sll(unsigned int dst, unsigned int src,
+			    unsigned int sa, struct jit_ctx *ctx)
+{
+	/* sa is 5-bits long */
+	if (sa >= BIT(5))
+		/* Shifting >= 32 results in zero */
+		emit_jit_reg_move(dst, r_zero, ctx);
+	else
+		emit_instr(ctx, sll, dst, src, sa);
+}
+
+static inline void emit_srlv(unsigned int dst, unsigned int src,
+			     unsigned int sa, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, srlv, dst, src, sa);
+}
+
+static inline void emit_srl(unsigned int dst, unsigned int src,
+			    unsigned int sa, struct jit_ctx *ctx)
+{
+	/* sa is 5-bits long */
+	if (sa >= BIT(5))
+		/* Shifting >= 32 results in zero */
+		emit_jit_reg_move(dst, r_zero, ctx);
+	else
+		emit_instr(ctx, srl, dst, src, sa);
+}
+
+static inline void emit_slt(unsigned int dst, unsigned int src1,
+			    unsigned int src2, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, slt, dst, src1, src2);
+}
+
+static inline void emit_sltu(unsigned int dst, unsigned int src1,
+			     unsigned int src2, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, sltu, dst, src1, src2);
+}
+
+static inline void emit_sltiu(unsigned dst, unsigned int src,
+			      unsigned int imm, struct jit_ctx *ctx)
+{
+	/* 16 bit immediate */
+	if (!is_range16((s32)imm)) {
+		emit_load_imm(r_tmp, imm, ctx);
+		emit_sltu(dst, src, r_tmp, ctx);
+	} else {
+		emit_instr(ctx, sltiu, dst, src, imm);
+	}
+
+}
+
+/* Store register on the stack */
+static inline void emit_store_stack_reg(ptr reg, ptr base,
+					unsigned int offset,
+					struct jit_ctx *ctx)
+{
+	emit_long_instr(ctx, SW, reg, offset, base);
+}
+
+static inline void emit_store(ptr reg, ptr base, unsigned int offset,
+			      struct jit_ctx *ctx)
+{
+	emit_instr(ctx, sw, reg, offset, base);
+}
+
+static inline void emit_load_stack_reg(ptr reg, ptr base,
+				       unsigned int offset,
+				       struct jit_ctx *ctx)
+{
+	emit_long_instr(ctx, LW, reg, offset, base);
+}
+
+static inline void emit_load(unsigned int reg, unsigned int base,
+			     unsigned int offset, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, lw, reg, offset, base);
+}
+
+static inline void emit_load_byte(unsigned int reg, unsigned int base,
+				  unsigned int offset, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, lb, reg, offset, base);
+}
+
+static inline void emit_half_load(unsigned int reg, unsigned int base,
+				  unsigned int offset, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, lh, reg, offset, base);
+}
+
+static inline void emit_half_load_unsigned(unsigned int reg, unsigned int base,
+					   unsigned int offset, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, lhu, reg, offset, base);
+}
+
+static inline void emit_mul(unsigned int dst, unsigned int src1,
+			    unsigned int src2, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, mul, dst, src1, src2);
+}
+
+static inline void emit_div(unsigned int dst, unsigned int src,
+			    struct jit_ctx *ctx)
+{
+	if (ctx->target != NULL) {
+		u32 *p = &ctx->target[ctx->idx];
+		uasm_i_divu(&p, dst, src);
+		p = &ctx->target[ctx->idx + 1];
+		uasm_i_mflo(&p, dst);
+	}
+	ctx->idx += 2; /* 2 insts */
+}
+
+static inline void emit_mod(unsigned int dst, unsigned int src,
+			    struct jit_ctx *ctx)
+{
+	if (ctx->target != NULL) {
+		u32 *p = &ctx->target[ctx->idx];
+		uasm_i_divu(&p, dst, src);
+		p = &ctx->target[ctx->idx + 1];
+		uasm_i_mfhi(&p, dst);
+	}
+	ctx->idx += 2; /* 2 insts */
+}
+
+static inline void emit_dsll(unsigned int dst, unsigned int src,
+			     unsigned int sa, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, dsll, dst, src, sa);
+}
+
+static inline void emit_dsrl32(unsigned int dst, unsigned int src,
+			       unsigned int sa, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, dsrl32, dst, src, sa);
+}
+
+static inline void emit_wsbh(unsigned int dst, unsigned int src,
+			     struct jit_ctx *ctx)
+{
+	emit_instr(ctx, wsbh, dst, src);
+}
+
+/* load pointer to register */
+static inline void emit_load_ptr(unsigned int dst, unsigned int src,
+				     int imm, struct jit_ctx *ctx)
+{
+	/* src contains the base addr of the 32/64-pointer */
+	emit_long_instr(ctx, LW, dst, imm, src);
+}
+
+/* load a function pointer to register */
+static inline void emit_load_func(unsigned int reg, ptr imm,
+				  struct jit_ctx *ctx)
+{
+	if (IS_ENABLED(CONFIG_64BIT)) {
+		/* At this point imm is always 64-bit */
+		emit_load_imm(r_tmp, (u64)imm >> 32, ctx);
+		emit_dsll(r_tmp_imm, r_tmp, 16, ctx); /* left shift by 16 */
+		emit_ori(r_tmp, r_tmp_imm, (imm >> 16) & 0xffff, ctx);
+		emit_dsll(r_tmp_imm, r_tmp, 16, ctx); /* left shift by 16 */
+		emit_ori(reg, r_tmp_imm, imm & 0xffff, ctx);
+	} else {
+		emit_load_imm(reg, imm, ctx);
+	}
+}
+
+/* Move to real MIPS register */
+static inline void emit_reg_move(ptr dst, ptr src, struct jit_ctx *ctx)
+{
+	emit_long_instr(ctx, ADDU, dst, src, r_zero);
+}
+
+/* Move to JIT (32-bit) register */
+static inline void emit_jit_reg_move(ptr dst, ptr src, struct jit_ctx *ctx)
+{
+	emit_addu(dst, src, r_zero, ctx);
+}
+
+/* Compute the immediate value for PC-relative branches. */
+static inline u32 b_imm(unsigned int tgt, struct jit_ctx *ctx)
+{
+	if (ctx->target == NULL)
+		return 0;
+
+	/*
+	 * We want a pc-relative branch. We only do forward branches
+	 * so tgt is always after pc. tgt is the instruction offset
+	 * we want to jump to.
+
+	 * Branch on MIPS:
+	 * I: target_offset <- sign_extend(offset)
+	 * I+1: PC += target_offset (delay slot)
+	 *
+	 * ctx->idx currently points to the branch instruction
+	 * but the offset is added to the delay slot so we need
+	 * to subtract 4.
+	 */
+	return ctx->offsets[tgt] -
+		(ctx->idx * 4 - ctx->prologue_bytes) - 4;
+}
+
+static inline void emit_bcond(int cond, unsigned int reg1, unsigned int reg2,
+			     unsigned int imm, struct jit_ctx *ctx)
+{
+	if (ctx->target != NULL) {
+		u32 *p = &ctx->target[ctx->idx];
+
+		switch (cond) {
+		case MIPS_COND_EQ:
+			uasm_i_beq(&p, reg1, reg2, imm);
+			break;
+		case MIPS_COND_NE:
+			uasm_i_bne(&p, reg1, reg2, imm);
+			break;
+		case MIPS_COND_ALL:
+			uasm_i_b(&p, imm);
+			break;
+		default:
+			pr_warn("%s: Unhandled branch conditional: %d\n",
+				__func__, cond);
+		}
+	}
+	ctx->idx++;
+}
+
+static inline void emit_b(unsigned int imm, struct jit_ctx *ctx)
+{
+	emit_bcond(MIPS_COND_ALL, r_zero, r_zero, imm, ctx);
+}
+
+static inline void emit_jalr(unsigned int link, unsigned int reg,
+			     struct jit_ctx *ctx)
+{
+	emit_instr(ctx, jalr, link, reg);
+}
+
+static inline void emit_jr(unsigned int reg, struct jit_ctx *ctx)
+{
+	emit_instr(ctx, jr, reg);
+}
+
+static inline u16 align_sp(unsigned int num)
+{
+	/* Double word alignment for 32-bit, quadword for 64-bit */
+	unsigned int align = IS_ENABLED(CONFIG_64BIT) ? 16 : 8;
+	num = (num + (align - 1)) & -align;
+	return num;
+}
+
+static void save_bpf_jit_regs(struct jit_ctx *ctx, unsigned offset)
+{
+	int i = 0, real_off = 0;
+	u32 sflags, tmp_flags;
+
+	/* Adjust the stack pointer */
+	if (offset)
+		emit_stack_offset(-align_sp(offset), ctx);
+
+	tmp_flags = sflags = ctx->flags >> SEEN_SREG_SFT;
+	/* sflags is essentially a bitmap */
+	while (tmp_flags) {
+		if ((sflags >> i) & 0x1) {
+			emit_store_stack_reg(MIPS_R_S0 + i, r_sp, real_off,
+					     ctx);
+			real_off += SZREG;
+		}
+		i++;
+		tmp_flags >>= 1;
+	}
+
+	/* save return address */
+	if (ctx->flags & SEEN_CALL) {
+		emit_store_stack_reg(r_ra, r_sp, real_off, ctx);
+		real_off += SZREG;
+	}
+
+	/* Setup r_M leaving the alignment gap if necessary */
+	if (ctx->flags & SEEN_MEM) {
+		if (real_off % (SZREG * 2))
+			real_off += SZREG;
+		emit_long_instr(ctx, ADDIU, r_M, r_sp, real_off);
+	}
+}
+
+static void restore_bpf_jit_regs(struct jit_ctx *ctx,
+				 unsigned int offset)
+{
+	int i, real_off = 0;
+	u32 sflags, tmp_flags;
+
+	tmp_flags = sflags = ctx->flags >> SEEN_SREG_SFT;
+	/* sflags is a bitmap */
+	i = 0;
+	while (tmp_flags) {
+		if ((sflags >> i) & 0x1) {
+			emit_load_stack_reg(MIPS_R_S0 + i, r_sp, real_off,
+					    ctx);
+			real_off += SZREG;
+		}
+		i++;
+		tmp_flags >>= 1;
+	}
+
+	/* restore return address */
+	if (ctx->flags & SEEN_CALL)
+		emit_load_stack_reg(r_ra, r_sp, real_off, ctx);
+
+	/* Restore the sp and discard the scrach memory */
+	if (offset)
+		emit_stack_offset(align_sp(offset), ctx);
+}
+
+static unsigned int get_stack_depth(struct jit_ctx *ctx)
+{
+	int sp_off = 0;
+
+
+	/* How may s* regs do we need to preserved? */
+	sp_off += hweight32(ctx->flags >> SEEN_SREG_SFT) * SZREG;
+
+	if (ctx->flags & SEEN_MEM)
+		sp_off += 4 * BPF_MEMWORDS; /* BPF_MEMWORDS are 32-bit */
+
+	if (ctx->flags & SEEN_CALL)
+		sp_off += SZREG; /* Space for our ra register */
+
+	return sp_off;
+}
+
+static void build_prologue(struct jit_ctx *ctx)
+{
+	int sp_off;
+
+	/* Calculate the total offset for the stack pointer */
+	sp_off = get_stack_depth(ctx);
+	save_bpf_jit_regs(ctx, sp_off);
+
+	if (ctx->flags & SEEN_SKB)
+		emit_reg_move(r_skb, MIPS_R_A0, ctx);
+
+	if (ctx->flags & SEEN_SKB_DATA) {
+		/* Load packet length */
+		emit_load(r_skb_len, r_skb, offsetof(struct sk_buff, len),
+			  ctx);
+		emit_load(r_tmp, r_skb, offsetof(struct sk_buff, data_len),
+			  ctx);
+		/* Load the data pointer */
+		emit_load_ptr(r_skb_data, r_skb,
+			      offsetof(struct sk_buff, data), ctx);
+		/* Load the header length */
+		emit_subu(r_skb_hl, r_skb_len, r_tmp, ctx);
+	}
+
+	if (ctx->flags & SEEN_X)
+		emit_jit_reg_move(r_X, r_zero, ctx);
+
+	/*
+	 * Do not leak kernel data to userspace, we only need to clear
+	 * r_A if it is ever used.  In fact if it is never used, we
+	 * will not save/restore it, so clearing it in this case would
+	 * corrupt the state of the caller.
+	 */
+	if (bpf_needs_clear_a(&ctx->skf->insns[0]) &&
+	    (ctx->flags & SEEN_A))
+		emit_jit_reg_move(r_A, r_zero, ctx);
+}
+
+static void build_epilogue(struct jit_ctx *ctx)
+{
+	unsigned int sp_off;
+
+	/* Calculate the total offset for the stack pointer */
+
+	sp_off = get_stack_depth(ctx);
+	restore_bpf_jit_regs(ctx, sp_off);
+
+	/* Return */
+	emit_jr(r_ra, ctx);
+	emit_nop(ctx);
+}
+
+#define CHOOSE_LOAD_FUNC(K, func) \
+	((int)K < 0 ? ((int)K >= SKF_LL_OFF ? func##_negative : func) : \
+	 func##_positive)
+
+static int build_body(struct jit_ctx *ctx)
+{
+	const struct bpf_prog *prog = ctx->skf;
+	const struct sock_filter *inst;
+	unsigned int i, off, condt;
+	u32 k, b_off __maybe_unused;
+	u8 (*sk_load_func)(unsigned long *skb, int offset);
+
+	for (i = 0; i < prog->len; i++) {
+		u16 code;
+
+		inst = &(prog->insns[i]);
+		pr_debug("%s: code->0x%02x, jt->0x%x, jf->0x%x, k->0x%x\n",
+			 __func__, inst->code, inst->jt, inst->jf, inst->k);
+		k = inst->k;
+		code = bpf_anc_helper(inst);
+
+		if (ctx->target == NULL)
+			ctx->offsets[i] = ctx->idx * 4;
+
+		switch (code) {
+		case BPF_LD | BPF_IMM:
+			/* A <- k ==> li r_A, k */
+			ctx->flags |= SEEN_A;
+			emit_load_imm(r_A, k, ctx);
+			break;
+		case BPF_LD | BPF_W | BPF_LEN:
+			BUILD_BUG_ON(sizeof_field(struct sk_buff, len) != 4);
+			/* A <- len ==> lw r_A, offset(skb) */
+			ctx->flags |= SEEN_SKB | SEEN_A;
+			off = offsetof(struct sk_buff, len);
+			emit_load(r_A, r_skb, off, ctx);
+			break;
+		case BPF_LD | BPF_MEM:
+			/* A <- M[k] ==> lw r_A, offset(M) */
+			ctx->flags |= SEEN_MEM | SEEN_A;
+			emit_load(r_A, r_M, SCRATCH_OFF(k), ctx);
+			break;
+		case BPF_LD | BPF_W | BPF_ABS:
+			/* A <- P[k:4] */
+			sk_load_func = CHOOSE_LOAD_FUNC(k, sk_load_word);
+			goto load;
+		case BPF_LD | BPF_H | BPF_ABS:
+			/* A <- P[k:2] */
+			sk_load_func = CHOOSE_LOAD_FUNC(k, sk_load_half);
+			goto load;
+		case BPF_LD | BPF_B | BPF_ABS:
+			/* A <- P[k:1] */
+			sk_load_func = CHOOSE_LOAD_FUNC(k, sk_load_byte);
+load:
+			emit_load_imm(r_off, k, ctx);
+load_common:
+			ctx->flags |= SEEN_CALL | SEEN_OFF |
+				SEEN_SKB | SEEN_A | SEEN_SKB_DATA;
+
+			emit_load_func(r_s0, (ptr)sk_load_func, ctx);
+			emit_reg_move(MIPS_R_A0, r_skb, ctx);
+			emit_jalr(MIPS_R_RA, r_s0, ctx);
+			/* Load second argument to delay slot */
+			emit_reg_move(MIPS_R_A1, r_off, ctx);
+			/* Check the error value */
+			emit_bcond(MIPS_COND_EQ, r_ret, 0, b_imm(i + 1, ctx),
+				   ctx);
+			/* Load return register on DS for failures */
+			emit_reg_move(r_ret, r_zero, ctx);
+			/* Return with error */
+			emit_b(b_imm(prog->len, ctx), ctx);
+			emit_nop(ctx);
+			break;
+		case BPF_LD | BPF_W | BPF_IND:
+			/* A <- P[X + k:4] */
+			sk_load_func = sk_load_word;
+			goto load_ind;
+		case BPF_LD | BPF_H | BPF_IND:
+			/* A <- P[X + k:2] */
+			sk_load_func = sk_load_half;
+			goto load_ind;
+		case BPF_LD | BPF_B | BPF_IND:
+			/* A <- P[X + k:1] */
+			sk_load_func = sk_load_byte;
+load_ind:
+			ctx->flags |= SEEN_OFF | SEEN_X;
+			emit_addiu(r_off, r_X, k, ctx);
+			goto load_common;
+		case BPF_LDX | BPF_IMM:
+			/* X <- k */
+			ctx->flags |= SEEN_X;
+			emit_load_imm(r_X, k, ctx);
+			break;
+		case BPF_LDX | BPF_MEM:
+			/* X <- M[k] */
+			ctx->flags |= SEEN_X | SEEN_MEM;
+			emit_load(r_X, r_M, SCRATCH_OFF(k), ctx);
+			break;
+		case BPF_LDX | BPF_W | BPF_LEN:
+			/* X <- len */
+			ctx->flags |= SEEN_X | SEEN_SKB;
+			off = offsetof(struct sk_buff, len);
+			emit_load(r_X, r_skb, off, ctx);
+			break;
+		case BPF_LDX | BPF_B | BPF_MSH:
+			/* X <- 4 * (P[k:1] & 0xf) */
+			ctx->flags |= SEEN_X | SEEN_CALL | SEEN_SKB;
+			/* Load offset to a1 */
+			emit_load_func(r_s0, (ptr)sk_load_byte, ctx);
+			/*
+			 * This may emit two instructions so it may not fit
+			 * in the delay slot. So use a0 in the delay slot.
+			 */
+			emit_load_imm(MIPS_R_A1, k, ctx);
+			emit_jalr(MIPS_R_RA, r_s0, ctx);
+			emit_reg_move(MIPS_R_A0, r_skb, ctx); /* delay slot */
+			/* Check the error value */
+			emit_bcond(MIPS_COND_NE, r_ret, 0,
+				   b_imm(prog->len, ctx), ctx);
+			emit_reg_move(r_ret, r_zero, ctx);
+			/* We are good */
+			/* X <- P[1:K] & 0xf */
+			emit_andi(r_X, r_A, 0xf, ctx);
+			/* X << 2 */
+			emit_b(b_imm(i + 1, ctx), ctx);
+			emit_sll(r_X, r_X, 2, ctx); /* delay slot */
+			break;
+		case BPF_ST:
+			/* M[k] <- A */
+			ctx->flags |= SEEN_MEM | SEEN_A;
+			emit_store(r_A, r_M, SCRATCH_OFF(k), ctx);
+			break;
+		case BPF_STX:
+			/* M[k] <- X */
+			ctx->flags |= SEEN_MEM | SEEN_X;
+			emit_store(r_X, r_M, SCRATCH_OFF(k), ctx);
+			break;
+		case BPF_ALU | BPF_ADD | BPF_K:
+			/* A += K */
+			ctx->flags |= SEEN_A;
+			emit_addiu(r_A, r_A, k, ctx);
+			break;
+		case BPF_ALU | BPF_ADD | BPF_X:
+			/* A += X */
+			ctx->flags |= SEEN_A | SEEN_X;
+			emit_addu(r_A, r_A, r_X, ctx);
+			break;
+		case BPF_ALU | BPF_SUB | BPF_K:
+			/* A -= K */
+			ctx->flags |= SEEN_A;
+			emit_addiu(r_A, r_A, -k, ctx);
+			break;
+		case BPF_ALU | BPF_SUB | BPF_X:
+			/* A -= X */
+			ctx->flags |= SEEN_A | SEEN_X;
+			emit_subu(r_A, r_A, r_X, ctx);
+			break;
+		case BPF_ALU | BPF_MUL | BPF_K:
+			/* A *= K */
+			/* Load K to scratch register before MUL */
+			ctx->flags |= SEEN_A;
+			emit_load_imm(r_s0, k, ctx);
+			emit_mul(r_A, r_A, r_s0, ctx);
+			break;
+		case BPF_ALU | BPF_MUL | BPF_X:
+			/* A *= X */
+			ctx->flags |= SEEN_A | SEEN_X;
+			emit_mul(r_A, r_A, r_X, ctx);
+			break;
+		case BPF_ALU | BPF_DIV | BPF_K:
+			/* A /= k */
+			if (k == 1)
+				break;
+			if (optimize_div(&k)) {
+				ctx->flags |= SEEN_A;
+				emit_srl(r_A, r_A, k, ctx);
+				break;
+			}
+			ctx->flags |= SEEN_A;
+			emit_load_imm(r_s0, k, ctx);
+			emit_div(r_A, r_s0, ctx);
+			break;
+		case BPF_ALU | BPF_MOD | BPF_K:
+			/* A %= k */
+			if (k == 1) {
+				ctx->flags |= SEEN_A;
+				emit_jit_reg_move(r_A, r_zero, ctx);
+			} else {
+				ctx->flags |= SEEN_A;
+				emit_load_imm(r_s0, k, ctx);
+				emit_mod(r_A, r_s0, ctx);
+			}
+			break;
+		case BPF_ALU | BPF_DIV | BPF_X:
+			/* A /= X */
+			ctx->flags |= SEEN_X | SEEN_A;
+			/* Check if r_X is zero */
+			emit_bcond(MIPS_COND_EQ, r_X, r_zero,
+				   b_imm(prog->len, ctx), ctx);
+			emit_load_imm(r_ret, 0, ctx); /* delay slot */
+			emit_div(r_A, r_X, ctx);
+			break;
+		case BPF_ALU | BPF_MOD | BPF_X:
+			/* A %= X */
+			ctx->flags |= SEEN_X | SEEN_A;
+			/* Check if r_X is zero */
+			emit_bcond(MIPS_COND_EQ, r_X, r_zero,
+				   b_imm(prog->len, ctx), ctx);
+			emit_load_imm(r_ret, 0, ctx); /* delay slot */
+			emit_mod(r_A, r_X, ctx);
+			break;
+		case BPF_ALU | BPF_OR | BPF_K:
+			/* A |= K */
+			ctx->flags |= SEEN_A;
+			emit_ori(r_A, r_A, k, ctx);
+			break;
+		case BPF_ALU | BPF_OR | BPF_X:
+			/* A |= X */
+			ctx->flags |= SEEN_A;
+			emit_ori(r_A, r_A, r_X, ctx);
+			break;
+		case BPF_ALU | BPF_XOR | BPF_K:
+			/* A ^= k */
+			ctx->flags |= SEEN_A;
+			emit_xori(r_A, r_A, k, ctx);
+			break;
+		case BPF_ANC | SKF_AD_ALU_XOR_X:
+		case BPF_ALU | BPF_XOR | BPF_X:
+			/* A ^= X */
+			ctx->flags |= SEEN_A;
+			emit_xor(r_A, r_A, r_X, ctx);
+			break;
+		case BPF_ALU | BPF_AND | BPF_K:
+			/* A &= K */
+			ctx->flags |= SEEN_A;
+			emit_andi(r_A, r_A, k, ctx);
+			break;
+		case BPF_ALU | BPF_AND | BPF_X:
+			/* A &= X */
+			ctx->flags |= SEEN_A | SEEN_X;
+			emit_and(r_A, r_A, r_X, ctx);
+			break;
+		case BPF_ALU | BPF_LSH | BPF_K:
+			/* A <<= K */
+			ctx->flags |= SEEN_A;
+			emit_sll(r_A, r_A, k, ctx);
+			break;
+		case BPF_ALU | BPF_LSH | BPF_X:
+			/* A <<= X */
+			ctx->flags |= SEEN_A | SEEN_X;
+			emit_sllv(r_A, r_A, r_X, ctx);
+			break;
+		case BPF_ALU | BPF_RSH | BPF_K:
+			/* A >>= K */
+			ctx->flags |= SEEN_A;
+			emit_srl(r_A, r_A, k, ctx);
+			break;
+		case BPF_ALU | BPF_RSH | BPF_X:
+			ctx->flags |= SEEN_A | SEEN_X;
+			emit_srlv(r_A, r_A, r_X, ctx);
+			break;
+		case BPF_ALU | BPF_NEG:
+			/* A = -A */
+			ctx->flags |= SEEN_A;
+			emit_neg(r_A, ctx);
+			break;
+		case BPF_JMP | BPF_JA:
+			/* pc += K */
+			emit_b(b_imm(i + k + 1, ctx), ctx);
+			emit_nop(ctx);
+			break;
+		case BPF_JMP | BPF_JEQ | BPF_K:
+			/* pc += ( A == K ) ? pc->jt : pc->jf */
+			condt = MIPS_COND_EQ | MIPS_COND_K;
+			goto jmp_cmp;
+		case BPF_JMP | BPF_JEQ | BPF_X:
+			ctx->flags |= SEEN_X;
+			/* pc += ( A == X ) ? pc->jt : pc->jf */
+			condt = MIPS_COND_EQ | MIPS_COND_X;
+			goto jmp_cmp;
+		case BPF_JMP | BPF_JGE | BPF_K:
+			/* pc += ( A >= K ) ? pc->jt : pc->jf */
+			condt = MIPS_COND_GE | MIPS_COND_K;
+			goto jmp_cmp;
+		case BPF_JMP | BPF_JGE | BPF_X:
+			ctx->flags |= SEEN_X;
+			/* pc += ( A >= X ) ? pc->jt : pc->jf */
+			condt = MIPS_COND_GE | MIPS_COND_X;
+			goto jmp_cmp;
+		case BPF_JMP | BPF_JGT | BPF_K:
+			/* pc += ( A > K ) ? pc->jt : pc->jf */
+			condt = MIPS_COND_GT | MIPS_COND_K;
+			goto jmp_cmp;
+		case BPF_JMP | BPF_JGT | BPF_X:
+			ctx->flags |= SEEN_X;
+			/* pc += ( A > X ) ? pc->jt : pc->jf */
+			condt = MIPS_COND_GT | MIPS_COND_X;
+jmp_cmp:
+			/* Greater or Equal */
+			if ((condt & MIPS_COND_GE) ||
+			    (condt & MIPS_COND_GT)) {
+				if (condt & MIPS_COND_K) { /* K */
+					ctx->flags |= SEEN_A;
+					emit_sltiu(r_s0, r_A, k, ctx);
+				} else { /* X */
+					ctx->flags |= SEEN_A |
+						SEEN_X;
+					emit_sltu(r_s0, r_A, r_X, ctx);
+				}
+				/* A < (K|X) ? r_scrach = 1 */
+				b_off = b_imm(i + inst->jf + 1, ctx);
+				emit_bcond(MIPS_COND_NE, r_s0, r_zero, b_off,
+					   ctx);
+				emit_nop(ctx);
+				/* A > (K|X) ? scratch = 0 */
+				if (condt & MIPS_COND_GT) {
+					/* Checking for equality */
+					ctx->flags |= SEEN_A | SEEN_X;
+					if (condt & MIPS_COND_K)
+						emit_load_imm(r_s0, k, ctx);
+					else
+						emit_jit_reg_move(r_s0, r_X,
+								  ctx);
+					b_off = b_imm(i + inst->jf + 1, ctx);
+					emit_bcond(MIPS_COND_EQ, r_A, r_s0,
+						   b_off, ctx);
+					emit_nop(ctx);
+					/* Finally, A > K|X */
+					b_off = b_imm(i + inst->jt + 1, ctx);
+					emit_b(b_off, ctx);
+					emit_nop(ctx);
+				} else {
+					/* A >= (K|X) so jump */
+					b_off = b_imm(i + inst->jt + 1, ctx);
+					emit_b(b_off, ctx);
+					emit_nop(ctx);
+				}
+			} else {
+				/* A == K|X */
+				if (condt & MIPS_COND_K) { /* K */
+					ctx->flags |= SEEN_A;
+					emit_load_imm(r_s0, k, ctx);
+					/* jump true */
+					b_off = b_imm(i + inst->jt + 1, ctx);
+					emit_bcond(MIPS_COND_EQ, r_A, r_s0,
+						   b_off, ctx);
+					emit_nop(ctx);
+					/* jump false */
+					b_off = b_imm(i + inst->jf + 1,
+						      ctx);
+					emit_bcond(MIPS_COND_NE, r_A, r_s0,
+						   b_off, ctx);
+					emit_nop(ctx);
+				} else { /* X */
+					/* jump true */
+					ctx->flags |= SEEN_A | SEEN_X;
+					b_off = b_imm(i + inst->jt + 1,
+						      ctx);
+					emit_bcond(MIPS_COND_EQ, r_A, r_X,
+						   b_off, ctx);
+					emit_nop(ctx);
+					/* jump false */
+					b_off = b_imm(i + inst->jf + 1, ctx);
+					emit_bcond(MIPS_COND_NE, r_A, r_X,
+						   b_off, ctx);
+					emit_nop(ctx);
+				}
+			}
+			break;
+		case BPF_JMP | BPF_JSET | BPF_K:
+			ctx->flags |= SEEN_A;
+			/* pc += (A & K) ? pc -> jt : pc -> jf */
+			emit_load_imm(r_s1, k, ctx);
+			emit_and(r_s0, r_A, r_s1, ctx);
+			/* jump true */
+			b_off = b_imm(i + inst->jt + 1, ctx);
+			emit_bcond(MIPS_COND_NE, r_s0, r_zero, b_off, ctx);
+			emit_nop(ctx);
+			/* jump false */
+			b_off = b_imm(i + inst->jf + 1, ctx);
+			emit_b(b_off, ctx);
+			emit_nop(ctx);
+			break;
+		case BPF_JMP | BPF_JSET | BPF_X:
+			ctx->flags |= SEEN_X | SEEN_A;
+			/* pc += (A & X) ? pc -> jt : pc -> jf */
+			emit_and(r_s0, r_A, r_X, ctx);
+			/* jump true */
+			b_off = b_imm(i + inst->jt + 1, ctx);
+			emit_bcond(MIPS_COND_NE, r_s0, r_zero, b_off, ctx);
+			emit_nop(ctx);
+			/* jump false */
+			b_off = b_imm(i + inst->jf + 1, ctx);
+			emit_b(b_off, ctx);
+			emit_nop(ctx);
+			break;
+		case BPF_RET | BPF_A:
+			ctx->flags |= SEEN_A;
+			if (i != prog->len - 1)
+				/*
+				 * If this is not the last instruction
+				 * then jump to the epilogue
+				 */
+				emit_b(b_imm(prog->len, ctx), ctx);
+			emit_reg_move(r_ret, r_A, ctx); /* delay slot */
+			break;
+		case BPF_RET | BPF_K:
+			/*
+			 * It can emit two instructions so it does not fit on
+			 * the delay slot.
+			 */
+			emit_load_imm(r_ret, k, ctx);
+			if (i != prog->len - 1) {
+				/*
+				 * If this is not the last instruction
+				 * then jump to the epilogue
+				 */
+				emit_b(b_imm(prog->len, ctx), ctx);
+				emit_nop(ctx);
+			}
+			break;
+		case BPF_MISC | BPF_TAX:
+			/* X = A */
+			ctx->flags |= SEEN_X | SEEN_A;
+			emit_jit_reg_move(r_X, r_A, ctx);
+			break;
+		case BPF_MISC | BPF_TXA:
+			/* A = X */
+			ctx->flags |= SEEN_A | SEEN_X;
+			emit_jit_reg_move(r_A, r_X, ctx);
+			break;
+		/* AUX */
+		case BPF_ANC | SKF_AD_PROTOCOL:
+			/* A = ntohs(skb->protocol */
+			ctx->flags |= SEEN_SKB | SEEN_OFF | SEEN_A;
+			BUILD_BUG_ON(sizeof_field(struct sk_buff,
+						  protocol) != 2);
+			off = offsetof(struct sk_buff, protocol);
+			emit_half_load(r_A, r_skb, off, ctx);
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+			/* This needs little endian fixup */
+			if (cpu_has_wsbh) {
+				/* R2 and later have the wsbh instruction */
+				emit_wsbh(r_A, r_A, ctx);
+			} else {
+				/* Get first byte */
+				emit_andi(r_tmp_imm, r_A, 0xff, ctx);
+				/* Shift it */
+				emit_sll(r_tmp, r_tmp_imm, 8, ctx);
+				/* Get second byte */
+				emit_srl(r_tmp_imm, r_A, 8, ctx);
+				emit_andi(r_tmp_imm, r_tmp_imm, 0xff, ctx);
+				/* Put everyting together in r_A */
+				emit_or(r_A, r_tmp, r_tmp_imm, ctx);
+			}
+#endif
+			break;
+		case BPF_ANC | SKF_AD_CPU:
+			ctx->flags |= SEEN_A | SEEN_OFF;
+			/* A = current_thread_info()->cpu */
+			BUILD_BUG_ON(sizeof_field(struct thread_info,
+						  cpu) != 4);
+			off = offsetof(struct thread_info, cpu);
+			/* $28/gp points to the thread_info struct */
+			emit_load(r_A, 28, off, ctx);
+			break;
+		case BPF_ANC | SKF_AD_IFINDEX:
+			/* A = skb->dev->ifindex */
+		case BPF_ANC | SKF_AD_HATYPE:
+			/* A = skb->dev->type */
+			ctx->flags |= SEEN_SKB | SEEN_A;
+			off = offsetof(struct sk_buff, dev);
+			/* Load *dev pointer */
+			emit_load_ptr(r_s0, r_skb, off, ctx);
+			/* error (0) in the delay slot */
+			emit_bcond(MIPS_COND_EQ, r_s0, r_zero,
+				   b_imm(prog->len, ctx), ctx);
+			emit_reg_move(r_ret, r_zero, ctx);
+			if (code == (BPF_ANC | SKF_AD_IFINDEX)) {
+				BUILD_BUG_ON(sizeof_field(struct net_device, ifindex) != 4);
+				off = offsetof(struct net_device, ifindex);
+				emit_load(r_A, r_s0, off, ctx);
+			} else { /* (code == (BPF_ANC | SKF_AD_HATYPE) */
+				BUILD_BUG_ON(sizeof_field(struct net_device, type) != 2);
+				off = offsetof(struct net_device, type);
+				emit_half_load_unsigned(r_A, r_s0, off, ctx);
+			}
+			break;
+		case BPF_ANC | SKF_AD_MARK:
+			ctx->flags |= SEEN_SKB | SEEN_A;
+			BUILD_BUG_ON(sizeof_field(struct sk_buff, mark) != 4);
+			off = offsetof(struct sk_buff, mark);
+			emit_load(r_A, r_skb, off, ctx);
+			break;
+		case BPF_ANC | SKF_AD_RXHASH:
+			ctx->flags |= SEEN_SKB | SEEN_A;
+			BUILD_BUG_ON(sizeof_field(struct sk_buff, hash) != 4);
+			off = offsetof(struct sk_buff, hash);
+			emit_load(r_A, r_skb, off, ctx);
+			break;
+		case BPF_ANC | SKF_AD_VLAN_TAG:
+			ctx->flags |= SEEN_SKB | SEEN_A;
+			BUILD_BUG_ON(sizeof_field(struct sk_buff,
+						  vlan_tci) != 2);
+			off = offsetof(struct sk_buff, vlan_tci);
+			emit_half_load_unsigned(r_A, r_skb, off, ctx);
+			break;
+		case BPF_ANC | SKF_AD_VLAN_TAG_PRESENT:
+			ctx->flags |= SEEN_SKB | SEEN_A;
+			emit_load_byte(r_A, r_skb, PKT_VLAN_PRESENT_OFFSET(), ctx);
+			if (PKT_VLAN_PRESENT_BIT)
+				emit_srl(r_A, r_A, PKT_VLAN_PRESENT_BIT, ctx);
+			if (PKT_VLAN_PRESENT_BIT < 7)
+				emit_andi(r_A, r_A, 1, ctx);
+			break;
+		case BPF_ANC | SKF_AD_PKTTYPE:
+			ctx->flags |= SEEN_SKB;
+
+			emit_load_byte(r_tmp, r_skb, PKT_TYPE_OFFSET(), ctx);
+			/* Keep only the last 3 bits */
+			emit_andi(r_A, r_tmp, PKT_TYPE_MAX, ctx);
+#ifdef __BIG_ENDIAN_BITFIELD
+			/* Get the actual packet type to the lower 3 bits */
+			emit_srl(r_A, r_A, 5, ctx);
+#endif
+			break;
+		case BPF_ANC | SKF_AD_QUEUE:
+			ctx->flags |= SEEN_SKB | SEEN_A;
+			BUILD_BUG_ON(sizeof_field(struct sk_buff,
+						  queue_mapping) != 2);
+			BUILD_BUG_ON(offsetof(struct sk_buff,
+					      queue_mapping) > 0xff);
+			off = offsetof(struct sk_buff, queue_mapping);
+			emit_half_load_unsigned(r_A, r_skb, off, ctx);
+			break;
+		default:
+			pr_debug("%s: Unhandled opcode: 0x%02x\n", __FILE__,
+				 inst->code);
+			return -1;
+		}
+	}
+
+	/* compute offsets only during the first pass */
+	if (ctx->target == NULL)
+		ctx->offsets[i] = ctx->idx * 4;
+
+	return 0;
+}
+
+void bpf_jit_compile(struct bpf_prog *fp)
+{
+	struct jit_ctx ctx;
+	unsigned int alloc_size, tmp_idx;
+
+	if (!bpf_jit_enable)
+		return;
+
+	memset(&ctx, 0, sizeof(ctx));
+
+	ctx.offsets = kcalloc(fp->len + 1, sizeof(*ctx.offsets), GFP_KERNEL);
+	if (ctx.offsets == NULL)
+		return;
+
+	ctx.skf = fp;
+
+	if (build_body(&ctx))
+		goto out;
+
+	tmp_idx = ctx.idx;
+	build_prologue(&ctx);
+	ctx.prologue_bytes = (ctx.idx - tmp_idx) * 4;
+	/* just to complete the ctx.idx count */
+	build_epilogue(&ctx);
+
+	alloc_size = 4 * ctx.idx;
+	ctx.target = module_alloc(alloc_size);
+	if (ctx.target == NULL)
+		goto out;
+
+	/* Clean it */
+	memset(ctx.target, 0, alloc_size);
+
+	ctx.idx = 0;
+
+	/* Generate the actual JIT code */
+	build_prologue(&ctx);
+	build_body(&ctx);
+	build_epilogue(&ctx);
+
+	/* Update the icache */
+	flush_icache_range((ptr)ctx.target, (ptr)(ctx.target + ctx.idx));
+
+	if (bpf_jit_enable > 1)
+		/* Dump JIT code */
+		bpf_jit_dump(fp->len, alloc_size, 2, ctx.target);
+
+	fp->bpf_func = (void *)ctx.target;
+	fp->jited = 1;
+
+out:
+	kfree(ctx.offsets);
+}
+
+void bpf_jit_free(struct bpf_prog *fp)
+{
+	if (fp->jited)
+		module_memfree(fp->bpf_func);
+
+	bpf_prog_unlock_free(fp);
+}

arch/mips/net/bpf_jit_asm.S

···
+/*
+ * bpf_jib_asm.S: Packet/header access helper functions for MIPS/MIPS64 BPF
+ * compiler.
+ *
+ * Copyright (C) 2015 Imagination Technologies Ltd.
+ * Author: Markos Chandras <[e-mail]>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2 of the License.
+ */
+
+#include <asm/asm.h>
+#include <asm/isa-rev.h>
+#include <asm/regdef.h>
+#include "bpf_jit.h"
+
+/* ABI
+ *
+ * r_skb_hl	skb header length
+ * r_skb_data	skb data
+ * r_off(a1)	offset register
+ * r_A		BPF register A
+ * r_X		PF register X
+ * r_skb(a0)	*skb
+ * r_M		*scratch memory
+ * r_skb_le	skb length
+ * r_s0		Scratch register 0
+ * r_s1		Scratch register 1
+ *
+ * On entry:
+ * a0: *skb
+ * a1: offset (imm or imm + X)
+ *
+ * All non-BPF-ABI registers are free for use. On return, we only
+ * care about r_ret. The BPF-ABI registers are assumed to remain
+ * unmodified during the entire filter operation.
+ */
+
+#define skb	a0
+#define offset	a1
+#define SKF_LL_OFF  (-0x200000) /* Can't include linux/filter.h in assembly */
+
+	/* We know better :) so prevent assembler reordering etc */
+	.set 	noreorder
+
+#define is_offset_negative(TYPE)				\
+	/* If offset is negative we have more work to do */	\
+	slti	t0, offset, 0;					\
+	bgtz	t0, bpf_slow_path_##TYPE##_neg;			\
+	/* Be careful what follows in DS. */
+
+#define is_offset_in_header(SIZE, TYPE)				\
+	/* Reading from header? */				\
+	addiu	$r_s0, $r_skb_hl, -SIZE;			\
+	slt	t0, $r_s0, offset;				\
+	bgtz	t0, bpf_slow_path_##TYPE;			\
+
+LEAF(sk_load_word)
+	is_offset_negative(word)
+FEXPORT(sk_load_word_positive)
+	is_offset_in_header(4, word)
+	/* Offset within header boundaries */
+	PTR_ADDU t1, $r_skb_data, offset
+	.set	reorder
+	lw	$r_A, 0(t1)
+	.set	noreorder
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+# if MIPS_ISA_REV >= 2
+	wsbh	t0, $r_A
+	rotr	$r_A, t0, 16
+# else
+	sll	t0, $r_A, 24
+	srl	t1, $r_A, 24
+	srl	t2, $r_A, 8
+	or	t0, t0, t1
+	andi	t2, t2, 0xff00
+	andi	t1, $r_A, 0xff00
+	or	t0, t0, t2
+	sll	t1, t1, 8
+	or	$r_A, t0, t1
+# endif
+#endif
+	jr	$r_ra
+	 move	$r_ret, zero
+	END(sk_load_word)
+
+LEAF(sk_load_half)
+	is_offset_negative(half)
+FEXPORT(sk_load_half_positive)
+	is_offset_in_header(2, half)
+	/* Offset within header boundaries */
+	PTR_ADDU t1, $r_skb_data, offset
+	lhu	$r_A, 0(t1)
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+# if MIPS_ISA_REV >= 2
+	wsbh	$r_A, $r_A
+# else
+	sll	t0, $r_A, 8
+	srl	t1, $r_A, 8
+	andi	t0, t0, 0xff00
+	or	$r_A, t0, t1
+# endif
+#endif
+	jr	$r_ra
+	 move	$r_ret, zero
+	END(sk_load_half)
+
+LEAF(sk_load_byte)
+	is_offset_negative(byte)
+FEXPORT(sk_load_byte_positive)
+	is_offset_in_header(1, byte)
+	/* Offset within header boundaries */
+	PTR_ADDU t1, $r_skb_data, offset
+	lbu	$r_A, 0(t1)
+	jr	$r_ra
+	 move	$r_ret, zero
+	END(sk_load_byte)
+
+/*
+ * call skb_copy_bits:
+ * (prototype in linux/skbuff.h)
+ *
+ * int skb_copy_bits(sk_buff *skb, int offset, void *to, int len)
+ *
+ * o32 mandates we leave 4 spaces for argument registers in case
+ * the callee needs to use them. Even though we don't care about
+ * the argument registers ourselves, we need to allocate that space
+ * to remain ABI compliant since the callee may want to use that space.
+ * We also allocate 2 more spaces for $r_ra and our return register (*to).
+ *
+ * n64 is a bit different. The *caller* will allocate the space to preserve
+ * the arguments. So in 64-bit kernels, we allocate the 4-arg space for no
+ * good reason but it does not matter that much really.
+ *
+ * (void *to) is returned in r_s0
+ *
+ */
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+#define DS_OFFSET(SIZE) (4 * SZREG)
+#else
+#define DS_OFFSET(SIZE) ((4 * SZREG) + (4 - SIZE))
+#endif
+#define bpf_slow_path_common(SIZE)				\
+	/* Quick check. Are we within reasonable boundaries? */ \
+	LONG_ADDIU	$r_s1, $r_skb_len, -SIZE;		\
+	sltu		$r_s0, offset, $r_s1;			\
+	beqz		$r_s0, fault;				\
+	/* Load 4th argument in DS */				\
+	 LONG_ADDIU	a3, zero, SIZE;				\
+	PTR_ADDIU	$r_sp, $r_sp, -(6 * SZREG);		\
+	PTR_LA		t0, skb_copy_bits;			\
+	PTR_S		$r_ra, (5 * SZREG)($r_sp);		\
+	/* Assign low slot to a2 */				\
+	PTR_ADDIU	a2, $r_sp, DS_OFFSET(SIZE);		\
+	jalr		t0;					\
+	/* Reset our destination slot (DS but it's ok) */	\
+	 INT_S		zero, (4 * SZREG)($r_sp);		\
+	/*							\
+	 * skb_copy_bits returns 0 on success and -EFAULT	\
+	 * on error. Our data live in a2. Do not bother with	\
+	 * our data if an error has been returned.		\
+	 */							\
+	/* Restore our frame */					\
+	PTR_L		$r_ra, (5 * SZREG)($r_sp);		\
+	INT_L		$r_s0, (4 * SZREG)($r_sp);		\
+	bltz		v0, fault;				\
+	 PTR_ADDIU	$r_sp, $r_sp, 6 * SZREG;		\
+	move		$r_ret, zero;				\
+
+NESTED(bpf_slow_path_word, (6 * SZREG), $r_sp)
+	bpf_slow_path_common(4)
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+# if MIPS_ISA_REV >= 2
+	wsbh	t0, $r_s0
+	jr	$r_ra
+	 rotr	$r_A, t0, 16
+# else
+	sll	t0, $r_s0, 24
+	srl	t1, $r_s0, 24
+	srl	t2, $r_s0, 8
+	or	t0, t0, t1
+	andi	t2, t2, 0xff00
+	andi	t1, $r_s0, 0xff00
+	or	t0, t0, t2
+	sll	t1, t1, 8
+	jr	$r_ra
+	 or	$r_A, t0, t1
+# endif
+#else
+	jr	$r_ra
+	 move	$r_A, $r_s0
+#endif
+
+	END(bpf_slow_path_word)
+
+NESTED(bpf_slow_path_half, (6 * SZREG), $r_sp)
+	bpf_slow_path_common(2)
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+# if MIPS_ISA_REV >= 2
+	jr	$r_ra
+	 wsbh	$r_A, $r_s0
+# else
+	sll	t0, $r_s0, 8
+	andi	t1, $r_s0, 0xff00
+	andi	t0, t0, 0xff00
+	srl	t1, t1, 8
+	jr	$r_ra
+	 or	$r_A, t0, t1
+# endif
+#else
+	jr	$r_ra
+	 move	$r_A, $r_s0
+#endif
+
+	END(bpf_slow_path_half)
+
+NESTED(bpf_slow_path_byte, (6 * SZREG), $r_sp)
+	bpf_slow_path_common(1)
+	jr	$r_ra
+	 move	$r_A, $r_s0
+
+	END(bpf_slow_path_byte)
+
+/*
+ * Negative entry points
+ */
+	.macro bpf_is_end_of_data
+	li	t0, SKF_LL_OFF
+	/* Reading link layer data? */
+	slt	t1, offset, t0
+	bgtz	t1, fault
+	/* Be careful what follows in DS. */
+	.endm
+/*
+ * call skb_copy_bits:
+ * (prototype in linux/filter.h)
+ *
+ * void *bpf_internal_load_pointer_neg_helper(const struct sk_buff *skb,
+ *                                            int k, unsigned int size)
+ *
+ * see above (bpf_slow_path_common) for ABI restrictions
+ */
+#define bpf_negative_common(SIZE)					\
+	PTR_ADDIU	$r_sp, $r_sp, -(6 * SZREG);			\
+	PTR_LA		t0, bpf_internal_load_pointer_neg_helper;	\
+	PTR_S		$r_ra, (5 * SZREG)($r_sp);			\
+	jalr		t0;						\
+	 li		a2, SIZE;					\
+	PTR_L		$r_ra, (5 * SZREG)($r_sp);			\
+	/* Check return pointer */					\
+	beqz		v0, fault;					\
+	 PTR_ADDIU	$r_sp, $r_sp, 6 * SZREG;			\
+	/* Preserve our pointer */					\
+	move		$r_s0, v0;					\
+	/* Set return value */						\
+	move		$r_ret, zero;					\
+
+bpf_slow_path_word_neg:
+	bpf_is_end_of_data
+NESTED(sk_load_word_negative, (6 * SZREG), $r_sp)
+	bpf_negative_common(4)
+	jr	$r_ra
+	 lw	$r_A, 0($r_s0)
+	END(sk_load_word_negative)
+
+bpf_slow_path_half_neg:
+	bpf_is_end_of_data
+NESTED(sk_load_half_negative, (6 * SZREG), $r_sp)
+	bpf_negative_common(2)
+	jr	$r_ra
+	 lhu	$r_A, 0($r_s0)
+	END(sk_load_half_negative)
+
+bpf_slow_path_byte_neg:
+	bpf_is_end_of_data
+NESTED(sk_load_byte_negative, (6 * SZREG), $r_sp)
+	bpf_negative_common(1)
+	jr	$r_ra
+	 lbu	$r_A, 0($r_s0)
+	END(sk_load_byte_negative)
+
+fault:
+	jr	$r_ra
+	 addiu $r_ret, zero, 1

arch/mips/pci/pci-ip27.c

···
 #include <asm/sn/addrs.h>
 #include <asm/sn/types.h>
 #include <asm/sn/klconfig.h>
-#include <asm/sn/hub.h>
+#include <asm/sn/agent.h>
 #include <asm/sn/ioc3.h>
 #include <asm/pci/bridge.h>
 

arch/mips/pci/pci-xtalk-bridge.c

···
 	struct irq_alloc_info info;
 	int irq;
 
-	irq = bc->pci_int[slot];
+	switch (pin) {
+	case PCI_INTERRUPT_UNKNOWN:
+	case PCI_INTERRUPT_INTA:
+	case PCI_INTERRUPT_INTC:
+		pin = 0;
+		break;
+	case PCI_INTERRUPT_INTB:
+	case PCI_INTERRUPT_INTD:
+		pin = 1;
+	}
+
+	irq = bc->pci_int[slot][pin];
 	if (irq == -1) {
 		info.ctrl = bc;
 		info.nasid = bc->nasid;
-		info.pin = slot;
+		info.pin = bc->int_mapping[slot][pin];
 
 		irq = irq_domain_alloc_irqs(bc->domain, 1, bc->nasid, &info);
 		if (irq < 0)
 			return irq;
 
-		bc->pci_int[slot] = irq;
+		bc->pci_int[slot][pin] = irq;
 	}
 	return irq;
 }
···
 {
 	bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP27_BASEIO6G);
 	bc->ioc3_sid[6] = IOC3_SID(IOC3_SUBSYS_IP27_MIO);
+	bc->int_mapping[2][1] = 4;
+	bc->int_mapping[6][1] = 6;
 }
 
 static void bridge_setup_ip27_baseio(struct bridge_controller *bc)
 {
 	bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP27_BASEIO);
+	bc->int_mapping[2][1] = 4;
 }
 
 static void bridge_setup_ip29_baseio(struct bridge_controller *bc)
 {
 	bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP29_SYSBOARD);
+	bc->int_mapping[2][1] = 3;
 }
 
 static void bridge_setup_ip30_sysboard(struct bridge_controller *bc)
 {
 	bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP30_SYSBOARD);
+	bc->int_mapping[2][1] = 4;
 }
 
 static void bridge_setup_menet(struct bridge_controller *bc)
···
 	bc->ioc3_sid[1] = IOC3_SID(IOC3_SUBSYS_MENET);
 	bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_MENET);
 	bc->ioc3_sid[3] = IOC3_SID(IOC3_SUBSYS_MENET4);
+}
+
+static void bridge_setup_io7(struct bridge_controller *bc)
+{
+	bc->ioc3_sid[4] = IOC3_SID(IOC3_SUBSYS_IO7);
+}
+
+static void bridge_setup_io8(struct bridge_controller *bc)
+{
+	bc->ioc3_sid[4] = IOC3_SID(IOC3_SUBSYS_IO8);
+}
+
+static void bridge_setup_io9(struct bridge_controller *bc)
+{
+	bc->ioc3_sid[1] = IOC3_SID(IOC3_SUBSYS_IO9);
+}
+
+static void bridge_setup_ip34_fuel_sysboard(struct bridge_controller *bc)
+{
+	bc->ioc3_sid[4] = IOC3_SID(IOC3_SUBSYS_IP34_SYSBOARD);
 }
 
 #define BRIDGE_BOARD_SETUP(_partno, _setup)	\
···
 	BRIDGE_BOARD_SETUP("030-0887-", bridge_setup_ip30_sysboard),
 	BRIDGE_BOARD_SETUP("030-1467-", bridge_setup_ip30_sysboard),
 	BRIDGE_BOARD_SETUP("030-0873-", bridge_setup_menet),
+	BRIDGE_BOARD_SETUP("030-1557-", bridge_setup_io7),
+	BRIDGE_BOARD_SETUP("030-1673-", bridge_setup_io8),
+	BRIDGE_BOARD_SETUP("030-1771-", bridge_setup_io9),
+	BRIDGE_BOARD_SETUP("030-1707-", bridge_setup_ip34_fuel_sysboard),
 };
 
 static void bridge_setup_board(struct bridge_controller *bc, char *partnum)
···
 
 	for (slot = 0; slot < 8; slot++) {
 		bridge_set(bc, b_device[slot].reg, BRIDGE_DEV_SWAP_DIR);
-		bc->pci_int[slot] = -1;
+		bc->pci_int[slot][0] = -1;
+		bc->pci_int[slot][1] = -1;
+		/* default interrupt pin mapping */
+		bc->int_mapping[slot][0] = slot;
+		bc->int_mapping[slot][1] = slot ^ 4;
 	}
 	bridge_read(bc, b_wid_tflush);	  /* wait until Bridge PIO complete */
 

arch/mips/ralink/ill_acc.c

···
 	irq = irq_of_parse_and_map(np, 0);
 	if (!irq) {
 		dev_err(&pdev->dev, "failed to get irq\n");
+		put_device(&pdev->dev);
 		return -EINVAL;
 	}
 
 	if (request_irq(irq, ill_acc_irq_handler, 0, "ill_acc", &pdev->dev)) {
 		dev_err(&pdev->dev, "failed to request irq\n");
+		put_device(&pdev->dev);
 		return -EINVAL;
 	}
 

arch/mips/sgi-ip22/ip22-gio.c

···
  * Used by a driver to check whether an of_device present in the
  * system is in its list of supported devices.
  */
-const struct gio_device_id *gio_match_device(const struct gio_device_id *match,
-		     const struct gio_device *dev)
+static const struct gio_device_id *
+gio_match_device(const struct gio_device_id *match,
+		 const struct gio_device *dev)
 {
 	const struct gio_device_id *ids;
 
···
 
 	return NULL;
 }
-EXPORT_SYMBOL_GPL(gio_match_device);
 
 struct gio_device *gio_dev_get(struct gio_device *dev)
 {

arch/mips/sgi-ip27/ip27-berr.c

···
 
 #include <asm/ptrace.h>
 #include <asm/sn/addrs.h>
+#include <asm/sn/agent.h>
 #include <asm/sn/arch.h>
-#include <asm/sn/sn0/hub.h>
 #include <asm/tlbdebug.h>
 #include <asm/traps.h>
 #include <linux/uaccess.h>
···
 		{ "WERR", "Uncached Partial Write", "PWERR", "Write Timeout",
 		  NULL, NULL, NULL, NULL }
 	};
-	int wrb = errst1 & PI_ERR_ST1_WRBRRB_MASK;
+	union pi_err_stat0 st0;
+	union pi_err_stat1 st1;
 
-	if (!(errst0 & PI_ERR_ST0_VALID_MASK)) {
-		printk("Hub does not contain valid error information\n");
+	st0.pi_stat0_word = errst0;
+	st1.pi_stat1_word = errst1;
+
+	if (!st0.pi_stat0_fmt.s0_valid) {
+		pr_info("Hub does not contain valid error information\n");
 		return;
 	}
 
-
-	printk("Hub has valid error information:\n");
-	if (errst0 & PI_ERR_ST0_OVERRUN_MASK)
-		printk("Overrun is set.	 Error stack may contain additional "
+	pr_info("Hub has valid error information:\n");
+	if (st0.pi_stat0_fmt.s0_ovr_run)
+		pr_info("Overrun is set. Error stack may contain additional "
 		       "information.\n");
-	printk("Hub error address is %08lx\n",
-	       (errst0 & PI_ERR_ST0_ADDR_MASK) >> (PI_ERR_ST0_ADDR_SHFT - 3));
-	printk("Incoming message command 0x%lx\n",
-	       (errst0 & PI_ERR_ST0_CMD_MASK) >> PI_ERR_ST0_CMD_SHFT);
-	printk("Supplemental field of incoming message is 0x%lx\n",
-	       (errst0 & PI_ERR_ST0_SUPPL_MASK) >> PI_ERR_ST0_SUPPL_SHFT);
-	printk("T5 Rn (for RRB only) is 0x%lx\n",
-	       (errst0 & PI_ERR_ST0_REQNUM_MASK) >> PI_ERR_ST0_REQNUM_SHFT);
-	printk("Error type is %s\n", err_type[wrb]
-	       [(errst0 & PI_ERR_ST0_TYPE_MASK) >> PI_ERR_ST0_TYPE_SHFT]
-		? : "invalid");
+	pr_info("Hub error address is %08lx\n",
+		(unsigned long)st0.pi_stat0_fmt.s0_addr);
+	pr_info("Incoming message command 0x%lx\n",
+		(unsigned long)st0.pi_stat0_fmt.s0_cmd);
+	pr_info("Supplemental field of incoming message is 0x%lx\n",
+		(unsigned long)st0.pi_stat0_fmt.s0_supl);
+	pr_info("T5 Rn (for RRB only) is 0x%lx\n",
+		(unsigned long)st0.pi_stat0_fmt.s0_t5_req);
+	pr_info("Error type is %s\n", err_type[st1.pi_stat1_fmt.s1_rw_rb]
+	       [st0.pi_stat0_fmt.s0_err_type] ? : "invalid");
 }
 
 int ip27_be_handler(struct pt_regs *regs, int is_fixup)

arch/mips/sgi-ip27/ip27-common.h

···
 #ifndef __IP27_COMMON_H
 #define __IP27_COMMON_H
 
-extern void ip27_reboot_setup(void);
+extern nasid_t master_nasid;
+
+extern void cpu_node_probe(void);
 extern void hub_rt_clock_event_init(void);
+extern void hub_rtc_init(nasid_t nasid);
+extern void install_cpu_nmi_handler(int slice);
+extern void install_ipi(void);
+extern void ip27_reboot_setup(void);
 extern const struct plat_smp_ops ip27_smp_ops;
+extern unsigned long node_getfirstfree(nasid_t nasid);
+extern void per_cpu_init(void);
+extern void replicate_kernel_text(void);
+extern void setup_replication_mask(void);
 
 #endif /* __IP27_COMMON_H */

arch/mips/sgi-ip27/ip27-console.c

···
 #include <asm/page.h>
 #include <asm/setup.h>
 #include <asm/sn/addrs.h>
-#include <asm/sn/sn0/hub.h>
+#include <asm/sn/agent.h>
 #include <asm/sn/klconfig.h>
 #include <asm/sn/ioc3.h>
-#include <asm/sn/sn_private.h>
 
 #include <linux/serial.h>
 #include <linux/serial_core.h>
+
+#include "ip27-common.h"
 
 #define IOC3_CLK	(22000000 / 3)
 #define IOC3_FLAGS	(0)

arch/mips/sgi-ip27/ip27-hubio.c

···
 #include <linux/mmzone.h>
 #include <asm/sn/addrs.h>
 #include <asm/sn/arch.h>
-#include <asm/sn/hub.h>
+#include <asm/sn/agent.h>
+#include <asm/sn/io.h>
+#include <asm/xtalk/xtalk.h>
 
 
 static int force_fire_and_forget = 1;
···
  */
 static void hub_setup_prb(nasid_t nasid, int prbnum, int credits)
 {
-	iprb_t prb;
+	union iprb_u prb;
 	int prb_offset;
 
 	/*
···
 static void hub_set_piomode(nasid_t nasid)
 {
 	u64 ii_iowa;
-	hubii_wcr_t ii_wcr;
+	union hubii_wcr_u ii_wcr;
 	unsigned i;
 
 	ii_iowa = REMOTE_HUB_L(nasid, IIO_OUTWIDGET_ACCESS);

arch/mips/sgi-ip27/ip27-init.c

···
 #include <asm/pgtable.h>
 #include <asm/sgialib.h>
 #include <asm/time.h>
+#include <asm/sn/agent.h>
 #include <asm/sn/types.h>
-#include <asm/sn/sn0/addrs.h>
-#include <asm/sn/sn0/hubni.h>
-#include <asm/sn/sn0/hubio.h>
 #include <asm/sn/klconfig.h>
 #include <asm/sn/ioc3.h>
 #include <asm/mipsregs.h>
 #include <asm/sn/gda.h>
-#include <asm/sn/hub.h>
 #include <asm/sn/intr.h>
 #include <asm/current.h>
 #include <asm/processor.h>
 #include <asm/mmu_context.h>
 #include <asm/thread_info.h>
 #include <asm/sn/launch.h>
-#include <asm/sn/sn_private.h>
-#include <asm/sn/sn0/ip27.h>
 #include <asm/sn/mapped_kernel.h>
 
 #include "ip27-common.h"
···
 void per_cpu_init(void)
 {
 	int cpu = smp_processor_id();
-	int slice = LOCAL_HUB_L(PI_CPU_NUM);
 	nasid_t nasid = get_nasid();
-	struct hub_data *hub = hub_data(nasid);
-
-	if (test_and_set_bit(slice, &hub->slice_map))
-		return;
 
 	clear_c0_status(ST0_IM);
 
 	per_hub_init(nasid);
 
-	cpu_time_init();
+	pr_info("CPU %d clock is %dMHz.\n", cpu, sn_cpu_info[cpu].p_speed);
+
 	install_ipi();
 
 	/* Install our NMI handler if symmon hasn't installed one. */
···
 
 	enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE);
 	enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE);
-}
-
-/*
- * get_nasid() returns the physical node id number of the caller.
- */
-nasid_t
-get_nasid(void)
-{
-	return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
-			 >> NSRI_NODEID_SHFT);
 }
 
 void __init plat_mem_setup(void)

arch/mips/sgi-ip27/ip27-irq.c

···
 #include <asm/sn/addrs.h>
 #include <asm/sn/agent.h>
 #include <asm/sn/arch.h>
-#include <asm/sn/hub.h>
 #include <asm/sn/intr.h>
 #include <asm/sn/irq_alloc.h>
 
···
 	 * Mark these as reserved right away so they won't be used accidentally
 	 * later.
 	 */
-	for (i = 0; i <= BASE_PCI_IRQ; i++)
+	for (i = 0; i <= CPU_CALL_B_IRQ; i++)
 		set_bit(i, hub_irq_map);
-
-	set_bit(IP_PEND0_6_63, hub_irq_map);
 
 	for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++)
 		set_bit(i, hub_irq_map);

arch/mips/sgi-ip27/ip27-klconfig.c

···
 	/* Didn't find it. */
 	return (lboard_t *)NULL;
 }
-
-klcpu_t *nasid_slice_to_cpuinfo(nasid_t nasid, int slice)
-{
-	lboard_t *brd;
-	klcpu_t *acpu;
-
-	if (!(brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27)))
-		return (klcpu_t *)NULL;
-
-	if (!(acpu = (klcpu_t *)find_first_component(brd, KLSTRUCT_CPU)))
-		return (klcpu_t *)NULL;
-
-	do {
-		if ((acpu->cpu_info.physid) == slice)
-			return acpu;
-	} while ((acpu = (klcpu_t *)find_component(brd, (klinfo_t *)acpu,
-								KLSTRUCT_CPU)));
-	return (klcpu_t *)NULL;
-}
-
-klcpu_t *sn_get_cpuinfo(cpuid_t cpu)
-{
-	nasid_t nasid;
-	int slice;
-	klcpu_t *acpu;
-
-	if (!(cpu < MAXCPUS)) {
-		printk("sn_get_cpuinfo: illegal cpuid 0x%lx\n", cpu);
-		return NULL;
-	}
-
-	nasid = cputonasid(cpu);
-	if (nasid  == INVALID_NASID)
-		return NULL;
-
-	for (slice = 0; slice < CPUS_PER_NODE; slice++) {
-		acpu = nasid_slice_to_cpuinfo(nasid, slice);
-		if (acpu && acpu->cpu_info.virtid == cpu)
-			return acpu;
-	}
-	return NULL;
-}
-
-int get_cpu_slice(cpuid_t cpu)
-{
-	klcpu_t *acpu;
-
-	if ((acpu = sn_get_cpuinfo(cpu)) == NULL)
-		return -1;
-	return acpu->cpu_info.physid;
-}

arch/mips/sgi-ip27/ip27-klnuma.c

···
 #include <asm/sn/types.h>
 #include <asm/sn/arch.h>
 #include <asm/sn/gda.h>
-#include <asm/sn/hub.h>
 #include <asm/sn/mapped_kernel.h>
-#include <asm/sn/sn_private.h>
 
-static cpumask_t ktext_repmask;
+#include "ip27-common.h"
+
+static nodemask_t ktext_repmask;
 
 /*
  * XXX - This needs to be much smarter about where it puts copies of the
···
 void __init setup_replication_mask(void)
 {
 	/* Set only the master cnode's bit.  The master cnode is always 0. */
-	cpumask_clear(&ktext_repmask);
-	cpumask_set_cpu(0, &ktext_repmask);
+	nodes_clear(ktext_repmask);
+	node_set(0, ktext_repmask);
 
 #ifdef CONFIG_REPLICATE_KTEXT
 #ifndef CONFIG_MAPPED_KERNEL
···
 			if (nasid == 0)
 				continue;
 			/* Advertise that we have a copy of the kernel */
-			cpumask_set_cpu(nasid, &ktext_repmask);
+			node_set(nasid, ktext_repmask);
 		}
 	}
 #endif
···
 			continue;
 
 		/* Check if this node should get a copy of the kernel */
-		if (cpumask_test_cpu(client_nasid, &ktext_repmask)) {
+		if (node_isset(client_nasid, ktext_repmask)) {
 			server_nasid = client_nasid;
 			copy_kernel(server_nasid);
 		}
···
 	loadbase += 16777216;
 #endif
 	offset = PAGE_ALIGN((unsigned long)(&_end)) - loadbase;
-	if ((nasid == 0) || (cpumask_test_cpu(nasid, &ktext_repmask)))
+	if ((nasid == 0) || (node_isset(nasid, ktext_repmask)))
 		return TO_NODE(nasid, offset) >> PAGE_SHIFT;
 	else
 		return KDM_TO_PHYS(PAGE_ALIGN(SYMMON_STK_ADDR(nasid, 0))) >> PAGE_SHIFT;

arch/mips/sgi-ip27/ip27-memory.c

···
 #include <asm/sections.h>
 
 #include <asm/sn/arch.h>
-#include <asm/sn/hub.h>
+#include <asm/sn/agent.h>
 #include <asm/sn/klconfig.h>
-#include <asm/sn/sn_private.h>
 
+#include "ip27-common.h"
 
 #define SLOT_PFNSHIFT		(SLOT_SHIFT - PAGE_SHIFT)
 #define PFN_NASIDSHFT		(NASID_SHFT - PAGE_SHIFT)
···
 
 EXPORT_SYMBOL(__node_data);
 
-static int fine_mode;
-
-static int is_fine_dirmode(void)
+static u64 gen_region_mask(void)
 {
-	return ((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_REGIONSIZE_MASK) >> NSRI_REGIONSIZE_SHFT) & REGIONSIZE_FINE;
-}
-
-static u64 get_region(nasid_t nasid)
-{
-	if (fine_mode)
-		return nasid >> NASID_TO_FINEREG_SHFT;
-	else
-		return nasid >> NASID_TO_COARSEREG_SHFT;
-}
-
-static u64 region_mask;
-
-static void gen_region_mask(u64 *region_mask)
-{
+	int region_shift;
+	u64 region_mask;
 	nasid_t nasid;
 
-	(*region_mask) = 0;
-	for_each_online_node(nasid) {
-		(*region_mask) |= 1ULL << get_region(nasid);
-	}
+	region_shift = get_region_shift();
+	region_mask = 0;
+	for_each_online_node(nasid)
+		region_mask |= BIT_ULL(nasid >> region_shift);
+
+	return region_mask;
 }
 
 #define rou_rflag	rou_flags
···
 		} while ((brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)));
 	}
 
+	if (nasid_a == nasid_b)
+		return LOCAL_DISTANCE;
+
+	if (router_a == router_b)
+		return LOCAL_DISTANCE + 1;
+
 	if (router_a == NULL) {
 		pr_info("node_distance: router_a NULL\n");
-		return -1;
+		return 255;
 	}
 	if (router_b == NULL) {
 		pr_info("node_distance: router_b NULL\n");
-		return -1;
+		return 255;
 	}
-
-	if (nasid_a == nasid_b)
-		return 0;
-
-	if (router_a == router_b)
-		return 1;
 
 	router_distance = 100;
 	router_recurse(router_a, router_b, 2);
 
-	return router_distance;
+	return LOCAL_DISTANCE + router_distance;
 }
 
 static void __init init_topology_matrix(void)
···
 
 static void __init mlreset(void)
 {
+	u64 region_mask;
 	nasid_t nasid;
 
 	master_nasid = get_nasid();
-	fine_mode = is_fine_dirmode();
 
 	/*
 	 * Probe for all CPUs - this creates the cpumask and sets up the
···
 	init_topology_matrix();
 	dump_topology();
 
-	gen_region_mask(&region_mask);
+	region_mask = gen_region_mask();
 
 	setup_replication_mask();
 

arch/mips/sgi-ip27/ip27-nmi.c

···
 #include <asm/sn/addrs.h>
 #include <asm/sn/nmi.h>
 #include <asm/sn/arch.h>
-#include <asm/sn/sn0/hub.h>
+#include <asm/sn/agent.h>
 
 #if 0
 #define NODE_NUM_CPUS(n)	CNODE_NUM_CPUS(n)
 #else
 #define NODE_NUM_CPUS(n)	CPUS_PER_NODE
 #endif
+
+#define SEND_NMI(_nasid, _slice)	\
+	REMOTE_HUB_S((_nasid),  (PI_NMI_A + ((_slice) * PI_NMI_OFFSET)), 1)
 
 typedef unsigned long machreg_t;
 

arch/mips/sgi-ip27/ip27-reset.c

···
 #include <asm/reboot.h>
 #include <asm/sgialib.h>
 #include <asm/sn/addrs.h>
+#include <asm/sn/agent.h>
 #include <asm/sn/arch.h>
 #include <asm/sn/gda.h>
-#include <asm/sn/sn0/hub.h>
 
 #include "ip27-common.h"
 

arch/mips/sgi-ip27/ip27-smp.c

···
 #include <asm/page.h>
 #include <asm/processor.h>
 #include <asm/ptrace.h>
+#include <asm/sn/agent.h>
 #include <asm/sn/arch.h>
 #include <asm/sn/gda.h>
 #include <asm/sn/intr.h>
 #include <asm/sn/klconfig.h>
 #include <asm/sn/launch.h>
 #include <asm/sn/mapped_kernel.h>
-#include <asm/sn/sn_private.h>
 #include <asm/sn/types.h>
-#include <asm/sn/sn0/hubpi.h>
-#include <asm/sn/sn0/hubio.h>
-#include <asm/sn/sn0/ip27.h>
 
 #include "ip27-common.h"
 
-/*
- * Takes as first input the PROM assigned cpu id, and the kernel
- * assigned cpu id as the second.
- */
-static void alloc_cpupda(nasid_t nasid, cpuid_t cpu, int cpunum)
+static int node_scan_cpus(nasid_t nasid, int highest)
 {
-	cputonasid(cpunum) = nasid;
-	cputoslice(cpunum) = get_cpu_slice(cpu);
-}
-
-static int do_cpumask(nasid_t nasid, int highest)
-{
-	static int tot_cpus_found = 0;
+	static int cpus_found;
 	lboard_t *brd;
 	klcpu_t *acpu;
-	int cpus_found = 0;
 	cpuid_t cpuid;
 
 	brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27);
···
 			cpuid = acpu->cpu_info.virtid;
 			/* Only let it join in if it's marked enabled */
 			if ((acpu->cpu_info.flags & KLINFO_ENABLE) &&
-			    (tot_cpus_found != NR_CPUS)) {
+			    (cpus_found != NR_CPUS)) {
 				if (cpuid > highest)
 					highest = cpuid;
 				set_cpu_possible(cpuid, true);
-				alloc_cpupda(nasid, cpuid, tot_cpus_found);
+				cputonasid(cpus_found) = nasid;
+				cputoslice(cpus_found) = acpu->cpu_info.physid;
+				sn_cpu_info[cpus_found].p_speed =
+							acpu->cpu_speed;
 				cpus_found++;
-				tot_cpus_found++;
 			}
 			acpu = (klcpu_t *)find_component(brd, (klinfo_t *)acpu,
 								KLSTRUCT_CPU);
···
 		if (nasid == INVALID_NASID)
 			break;
 		node_set_online(nasid);
-		highest = do_cpumask(nasid, highest);
+		highest = node_scan_cpus(nasid, highest);
 	}
 
 	printk("Discovered %d cpus on %d nodes\n", highest + 1, num_online_nodes());
···
 	/*
 	 * PROM sets up system, that boot cpu is always first CPU on nasid 0
 	 */
-	alloc_cpupda(0, 0, 0);
+	cputonasid(0) = 0;
+	cputoslice(0) = LOCAL_HUB_L(PI_CPU_NUM);
 }
 
 static void __init ip27_prepare_cpus(unsigned int max_cpus)

arch/mips/sgi-ip27/ip27-timer.c

···
 #include <asm/sn/klconfig.h>
 #include <asm/sn/arch.h>
 #include <asm/sn/addrs.h>
-#include <asm/sn/sn_private.h>
-#include <asm/sn/sn0/ip27.h>
-#include <asm/sn/sn0/hub.h>
+#include <asm/sn/agent.h>
+
+#include "ip27-common.h"
 
 #define TICK_SIZE (tick_nsec / 1000)
 
 /* Includes for ioc3_init().  */
 #include <asm/sn/types.h>
-#include <asm/sn/sn0/addrs.h>
-#include <asm/sn/sn0/hubni.h>
-#include <asm/sn/sn0/hubio.h>
 #include <asm/pci/bridge.h>
 
 #include "ip27-common.h"
···
 	hub_rt_clock_event_init();
 }
 
-void cpu_time_init(void)
-{
-	lboard_t *board;
-	klcpu_t *cpu;
-	int cpuid;
-
-	/* Don't use ARCS.  ARCS is fragile.  Klconfig is simple and sane.  */
-	board = find_lboard(KL_CONFIG_INFO(get_nasid()), KLTYPE_IP27);
-	if (!board)
-		panic("Can't find board info for myself.");
-
-	cpuid = LOCAL_HUB_L(PI_CPU_NUM) ? IP27_CPU0_INDEX : IP27_CPU1_INDEX;
-	cpu = (klcpu_t *) KLCF_COMP(board, cpuid);
-	if (!cpu)
-		panic("No information about myself?");
-
-	printk("CPU %d clock is %dMHz.\n", smp_processor_id(), cpu->cpu_speed);
-}
-
 void hub_rtc_init(nasid_t nasid)
 {
 
···
 		LOCAL_HUB_S(PI_RT_PEND_B, 0);
 	}
 }
-
-static int __init sgi_ip27_rtc_devinit(void)
-{
-	struct resource res;
-
-	memset(&res, 0, sizeof(res));
-	res.start = XPHYSADDR(KL_CONFIG_CH_CONS_INFO(master_nasid)->memory_base +
-			      IOC3_BYTEBUS_DEV0);
-	res.end = res.start + 32767;
-	res.flags = IORESOURCE_MEM;
-
-	return IS_ERR(platform_device_register_simple("rtc-m48t35", -1,
-						      &res, 1));
-}
-
-/*
- * kludge make this a device_initcall after ioc3 resource conflicts
- * are resolved
- */
-late_initcall(sgi_ip27_rtc_devinit);

arch/mips/sgi-ip27/ip27-xtalk.c

···
 #include <asm/sn/addrs.h>
 #include <asm/sn/types.h>
 #include <asm/sn/klconfig.h>
-#include <asm/sn/hub.h>
 #include <asm/pci/bridge.h>
 #include <asm/xtalk/xtalk.h>
 

arch/mips/sgi-ip30/ip30-irq.c

···
 		return;
 
 	irqd = irq_domain_get_irq_data(domain, virq);
-	clear_bit(irqd->hwirq, heart_irq_map);
-	if (irqd && irqd->chip_data)
+	if (irqd) {
+		clear_bit(irqd->hwirq, heart_irq_map);
 		kfree(irqd->chip_data);
+	}
 }
 
 static const struct irq_domain_ops heart_domain_ops = {

arch/mips/vdso/genvdso.c

···
 	fprintf(out_file, "#include <linux/linkage.h>\n");
 	fprintf(out_file, "#include <linux/mm.h>\n");
 	fprintf(out_file, "#include <asm/vdso.h>\n");
+	fprintf(out_file, "static int vdso_mremap(\n");
+	fprintf(out_file, "	const struct vm_special_mapping *sm,\n");
+	fprintf(out_file, "	struct vm_area_struct *new_vma)\n");
+	fprintf(out_file, "{\n");
+	fprintf(out_file, "	unsigned long new_size =\n");
+	fprintf(out_file, "	new_vma->vm_end - new_vma->vm_start;\n");
+	fprintf(out_file, "	if (vdso_image.size != new_size)\n");
+	fprintf(out_file, "		return -EINVAL;\n");
+	fprintf(out_file, "	current->mm->context.vdso =\n");
+	fprintf(out_file, "	(void __user *)(new_vma->vm_start);\n");
+	fprintf(out_file, "	return 0;\n");
+	fprintf(out_file, "}\n");
 
 	/* Write out the stripped VDSO data. */
 	fprintf(out_file,
···
 	fprintf(out_file, "\t.mapping = {\n");
 	fprintf(out_file, "\t\t.name = \"[vdso]\",\n");
 	fprintf(out_file, "\t\t.pages = vdso_pages,\n");
+	fprintf(out_file, "\t\t.mremap = vdso_mremap,\n");
 	fprintf(out_file, "\t},\n");
 
 	/* Calculate and write symbol offsets to <output file> */

drivers/mfd/Kconfig

···
 	  Select this to get support for the Supervisory Processor
 	  device found on several devices in RAVE line of hardware.
 
+config SGI_MFD_IOC3
+	tristate "SGI IOC3 core driver"
+	depends on PCI && MIPS && 64BIT
+	select MFD_CORE
+	help
+	  This option enables basic support for the SGI IOC3-based
+	  controller cards.  This option does not enable any specific
+	  functions on such a card, but provides necessary infrastructure
+	  for other drivers to utilize.
+
+	  If you have an SGI Origin, Octane, or a PCI IOC3 card,
+	  then say Y. Otherwise say N.
+
 endmenu
 endif

drivers/mfd/Makefile

···
 obj-$(CONFIG_MFD_ROHM_BD718XX)	+= rohm-bd718x7.o
 obj-$(CONFIG_MFD_STMFX) 	+= stmfx.o
 
+obj-$(CONFIG_SGI_MFD_IOC3)	+= ioc3.o

drivers/mfd/ioc3.c

···
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SGI IOC3 multifunction device driver
+ *
+ * Copyright (C) 2018, 2019 Thomas Bogendoerfer <[e-mail]>
+ *
+ * Based on work by:
+ *   Stanislaw Skowronek <[e-mail]>
+ *   Joshua Kinard <[e-mail]>
+ *   Brent Casavant <[e-mail]> - IOC4 master driver
+ *   Pat Gefre <[e-mail]> - IOC3 serial port IRQ demuxer
+ */
+
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/sgi-w1.h>
+#include <linux/rtc/ds1685.h>
+
+#include <asm/pci/bridge.h>
+#include <asm/sn/ioc3.h>
+
+#define IOC3_IRQ_SERIAL_A	6
+#define IOC3_IRQ_SERIAL_B	15
+#define IOC3_IRQ_KBD		22
+
+/* Bitmask for selecting which IRQs are level triggered */
+#define IOC3_LVL_MASK	(BIT(IOC3_IRQ_SERIAL_A) | BIT(IOC3_IRQ_SERIAL_B))
+
+#define M48T35_REG_SIZE	32768	/* size of m48t35 registers */
+
+/* 1.2 us latency timer (40 cycles at 33 MHz) */
+#define IOC3_LATENCY	40
+
+struct ioc3_priv_data {
+	struct irq_domain *domain;
+	struct ioc3 __iomem *regs;
+	struct pci_dev *pdev;
+	int domain_irq;
+};
+
+static void ioc3_irq_ack(struct irq_data *d)
+{
+	struct ioc3_priv_data *ipd = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
+
+	writel(BIT(hwirq), &ipd->regs->sio_ir);
+}
+
+static void ioc3_irq_mask(struct irq_data *d)
+{
+	struct ioc3_priv_data *ipd = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
+
+	writel(BIT(hwirq), &ipd->regs->sio_iec);
+}
+
+static void ioc3_irq_unmask(struct irq_data *d)
+{
+	struct ioc3_priv_data *ipd = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
+
+	writel(BIT(hwirq), &ipd->regs->sio_ies);
+}
+
+static struct irq_chip ioc3_irq_chip = {
+	.name		= "IOC3",
+	.irq_ack	= ioc3_irq_ack,
+	.irq_mask	= ioc3_irq_mask,
+	.irq_unmask	= ioc3_irq_unmask,
+};
+
+static int ioc3_irq_domain_map(struct irq_domain *d, unsigned int irq,
+			      irq_hw_number_t hwirq)
+{
+	/* Set level IRQs for every interrupt contained in IOC3_LVL_MASK */
+	if (BIT(hwirq) & IOC3_LVL_MASK)
+		irq_set_chip_and_handler(irq, &ioc3_irq_chip, handle_level_irq);
+	else
+		irq_set_chip_and_handler(irq, &ioc3_irq_chip, handle_edge_irq);
+
+	irq_set_chip_data(irq, d->host_data);
+	return 0;
+}
+
+static void ioc3_irq_domain_unmap(struct irq_domain *d, unsigned int irq)
+{
+	irq_set_chip_and_handler(irq, NULL, NULL);
+	irq_set_chip_data(irq, NULL);
+}
+
+static const struct irq_domain_ops ioc3_irq_domain_ops = {
+	.map = ioc3_irq_domain_map,
+	.unmap = ioc3_irq_domain_unmap,
+};
+
+static void ioc3_irq_handler(struct irq_desc *desc)
+{
+	struct irq_domain *domain = irq_desc_get_handler_data(desc);
+	struct ioc3_priv_data *ipd = domain->host_data;
+	struct ioc3 __iomem *regs = ipd->regs;
+	u32 pending, mask;
+	unsigned int irq;
+
+	pending = readl(&regs->sio_ir);
+	mask = readl(&regs->sio_ies);
+	pending &= mask; /* Mask off not enabled interrupts */
+
+	if (pending) {
+		irq = irq_find_mapping(domain, __ffs(pending));
+		if (irq)
+			generic_handle_irq(irq);
+	} else  {
+		spurious_interrupt();
+	}
+}
+
+/*
+ * System boards/BaseIOs use more interrupt pins of the bridge ASIC
+ * to which the IOC3 is connected. Since the IOC3 MFD driver
+ * knows wiring of these extra pins, we use the map_irq function
+ * to get interrupts activated
+ */
+static int ioc3_map_irq(struct pci_dev *pdev, int slot, int pin)
+{
+	struct pci_host_bridge *hbrg = pci_find_host_bridge(pdev->bus);
+
+	return hbrg->map_irq(pdev, slot, pin);
+}
+
+static int ioc3_irq_domain_setup(struct ioc3_priv_data *ipd, int irq)
+{
+	struct irq_domain *domain;
+	struct fwnode_handle *fn;
+
+	fn = irq_domain_alloc_named_fwnode("IOC3");
+	if (!fn)
+		goto err;
+
+	domain = irq_domain_create_linear(fn, 24, &ioc3_irq_domain_ops, ipd);
+	if (!domain)
+		goto err;
+
+	irq_domain_free_fwnode(fn);
+	ipd->domain = domain;
+
+	irq_set_chained_handler_and_data(irq, ioc3_irq_handler, domain);
+	ipd->domain_irq = irq;
+	return 0;
+
+err:
+	dev_err(&ipd->pdev->dev, "irq domain setup failed\n");
+	return -ENOMEM;
+}
+
+static struct resource ioc3_uarta_resources[] = {
+	DEFINE_RES_MEM(offsetof(struct ioc3, sregs.uarta),
+		       sizeof_field(struct ioc3, sregs.uarta)),
+	DEFINE_RES_IRQ(IOC3_IRQ_SERIAL_A)
+};
+
+static struct resource ioc3_uartb_resources[] = {
+	DEFINE_RES_MEM(offsetof(struct ioc3, sregs.uartb),
+		       sizeof_field(struct ioc3, sregs.uartb)),
+	DEFINE_RES_IRQ(IOC3_IRQ_SERIAL_B)
+};
+
+static struct mfd_cell ioc3_serial_cells[] = {
+	{
+		.name = "ioc3-serial8250",
+		.resources = ioc3_uarta_resources,
+		.num_resources = ARRAY_SIZE(ioc3_uarta_resources),
+	},
+	{
+		.name = "ioc3-serial8250",
+		.resources = ioc3_uartb_resources,
+		.num_resources = ARRAY_SIZE(ioc3_uartb_resources),
+	}
+};
+
+static int ioc3_serial_setup(struct ioc3_priv_data *ipd)
+{
+	int ret;
+
+	/* Set gpio pins for RS232/RS422 mode selection */
+	writel(GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL,
+		&ipd->regs->gpcr_s);
+	/* Select RS232 mode for uart a */
+	writel(0, &ipd->regs->gppr[6]);
+	/* Select RS232 mode for uart b */
+	writel(0, &ipd->regs->gppr[7]);
+
+	/* Switch both ports to 16650 mode */
+	writel(readl(&ipd->regs->port_a.sscr) & ~SSCR_DMA_EN,
+	       &ipd->regs->port_a.sscr);
+	writel(readl(&ipd->regs->port_b.sscr) & ~SSCR_DMA_EN,
+	       &ipd->regs->port_b.sscr);
+	udelay(1000); /* Wait until mode switch is done */
+
+	ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO,
+			      ioc3_serial_cells, ARRAY_SIZE(ioc3_serial_cells),
+			      &ipd->pdev->resource[0], 0, ipd->domain);
+	if (ret) {
+		dev_err(&ipd->pdev->dev, "Failed to add 16550 subdevs\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct resource ioc3_kbd_resources[] = {
+	DEFINE_RES_MEM(offsetof(struct ioc3, serio),
+		       sizeof_field(struct ioc3, serio)),
+	DEFINE_RES_IRQ(IOC3_IRQ_KBD)
+};
+
+static struct mfd_cell ioc3_kbd_cells[] = {
+	{
+		.name = "ioc3-kbd",
+		.resources = ioc3_kbd_resources,
+		.num_resources = ARRAY_SIZE(ioc3_kbd_resources),
+	}
+};
+
+static int ioc3_kbd_setup(struct ioc3_priv_data *ipd)
+{
+	int ret;
+
+	ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO,
+			      ioc3_kbd_cells, ARRAY_SIZE(ioc3_kbd_cells),
+			      &ipd->pdev->resource[0], 0, ipd->domain);
+	if (ret) {
+		dev_err(&ipd->pdev->dev, "Failed to add 16550 subdevs\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct resource ioc3_eth_resources[] = {
+	DEFINE_RES_MEM(offsetof(struct ioc3, eth),
+		       sizeof_field(struct ioc3, eth)),
+	DEFINE_RES_MEM(offsetof(struct ioc3, ssram),
+		       sizeof_field(struct ioc3, ssram)),
+	DEFINE_RES_IRQ(0)
+};
+
+static struct resource ioc3_w1_resources[] = {
+	DEFINE_RES_MEM(offsetof(struct ioc3, mcr),
+		       sizeof_field(struct ioc3, mcr)),
+};
+static struct sgi_w1_platform_data ioc3_w1_platform_data;
+
+static struct mfd_cell ioc3_eth_cells[] = {
+	{
+		.name = "ioc3-eth",
+		.resources = ioc3_eth_resources,
+		.num_resources = ARRAY_SIZE(ioc3_eth_resources),
+	},
+	{
+		.name = "sgi_w1",
+		.resources = ioc3_w1_resources,
+		.num_resources = ARRAY_SIZE(ioc3_w1_resources),
+		.platform_data = &ioc3_w1_platform_data,
+		.pdata_size = sizeof(ioc3_w1_platform_data),
+	}
+};
+
+static int ioc3_eth_setup(struct ioc3_priv_data *ipd)
+{
+	int ret;
+
+	/* Enable One-Wire bus */
+	writel(GPCR_MLAN_EN, &ipd->regs->gpcr_s);
+
+	/* Generate unique identifier */
+	snprintf(ioc3_w1_platform_data.dev_id,
+		 sizeof(ioc3_w1_platform_data.dev_id), "ioc3-%012llx",
+		 ipd->pdev->resource->start);
+
+	ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO,
+			      ioc3_eth_cells, ARRAY_SIZE(ioc3_eth_cells),
+			      &ipd->pdev->resource[0], ipd->pdev->irq, NULL);
+	if (ret) {
+		dev_err(&ipd->pdev->dev, "Failed to add ETH/W1 subdev\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct resource ioc3_m48t35_resources[] = {
+	DEFINE_RES_MEM(IOC3_BYTEBUS_DEV0, M48T35_REG_SIZE)
+};
+
+static struct mfd_cell ioc3_m48t35_cells[] = {
+	{
+		.name = "rtc-m48t35",
+		.resources = ioc3_m48t35_resources,
+		.num_resources = ARRAY_SIZE(ioc3_m48t35_resources),
+	}
+};
+
+static int ioc3_m48t35_setup(struct ioc3_priv_data *ipd)
+{
+	int ret;
+
+	ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO,
+			      ioc3_m48t35_cells, ARRAY_SIZE(ioc3_m48t35_cells),
+			      &ipd->pdev->resource[0], 0, ipd->domain);
+	if (ret)
+		dev_err(&ipd->pdev->dev, "Failed to add M48T35 subdev\n");
+
+	return ret;
+}
+
+static struct ds1685_rtc_platform_data ip30_rtc_platform_data = {
+	.bcd_mode = false,
+	.no_irq = false,
+	.uie_unsupported = true,
+	.access_type = ds1685_reg_indirect,
+};
+
+static struct resource ioc3_rtc_ds1685_resources[] = {
+	DEFINE_RES_MEM(IOC3_BYTEBUS_DEV1, 1),
+	DEFINE_RES_MEM(IOC3_BYTEBUS_DEV2, 1),
+	DEFINE_RES_IRQ(0)
+};
+
+static struct mfd_cell ioc3_ds1685_cells[] = {
+	{
+		.name = "rtc-ds1685",
+		.resources = ioc3_rtc_ds1685_resources,
+		.num_resources = ARRAY_SIZE(ioc3_rtc_ds1685_resources),
+		.platform_data = &ip30_rtc_platform_data,
+		.pdata_size = sizeof(ip30_rtc_platform_data),
+		.id = PLATFORM_DEVID_NONE,
+	}
+};
+
+static int ioc3_ds1685_setup(struct ioc3_priv_data *ipd)
+{
+	int ret, irq;
+
+	irq = ioc3_map_irq(ipd->pdev, 6, 0);
+
+	ret = mfd_add_devices(&ipd->pdev->dev, 0, ioc3_ds1685_cells,
+			      ARRAY_SIZE(ioc3_ds1685_cells),
+			      &ipd->pdev->resource[0], irq, NULL);
+	if (ret)
+		dev_err(&ipd->pdev->dev, "Failed to add DS1685 subdev\n");
+
+	return ret;
+};
+
+
+static struct resource ioc3_leds_resources[] = {
+	DEFINE_RES_MEM(offsetof(struct ioc3, gppr[0]),
+		       sizeof_field(struct ioc3, gppr[0])),
+	DEFINE_RES_MEM(offsetof(struct ioc3, gppr[1]),
+		       sizeof_field(struct ioc3, gppr[1])),
+};
+
+static struct mfd_cell ioc3_led_cells[] = {
+	{
+		.name = "ip30-leds",
+		.resources = ioc3_leds_resources,
+		.num_resources = ARRAY_SIZE(ioc3_leds_resources),
+		.id = PLATFORM_DEVID_NONE,
+	}
+};
+
+static int ioc3_led_setup(struct ioc3_priv_data *ipd)
+{
+	int ret;
+
+	ret = mfd_add_devices(&ipd->pdev->dev, 0, ioc3_led_cells,
+			      ARRAY_SIZE(ioc3_led_cells),
+			      &ipd->pdev->resource[0], 0, ipd->domain);
+	if (ret)
+		dev_err(&ipd->pdev->dev, "Failed to add LED subdev\n");
+
+	return ret;
+}
+
+static int ip27_baseio_setup(struct ioc3_priv_data *ipd)
+{
+	int ret, io_irq;
+
+	io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn),
+			      PCI_INTERRUPT_INTB);
+	ret = ioc3_irq_domain_setup(ipd, io_irq);
+	if (ret)
+		return ret;
+
+	ret = ioc3_eth_setup(ipd);
+	if (ret)
+		return ret;
+
+	ret = ioc3_serial_setup(ipd);
+	if (ret)
+		return ret;
+
+	return ioc3_m48t35_setup(ipd);
+}
+
+static int ip27_baseio6g_setup(struct ioc3_priv_data *ipd)
+{
+	int ret, io_irq;
+
+	io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn),
+			      PCI_INTERRUPT_INTB);
+	ret = ioc3_irq_domain_setup(ipd, io_irq);
+	if (ret)
+		return ret;
+
+	ret = ioc3_eth_setup(ipd);
+	if (ret)
+		return ret;
+
+	ret = ioc3_serial_setup(ipd);
+	if (ret)
+		return ret;
+
+	ret = ioc3_m48t35_setup(ipd);
+	if (ret)
+		return ret;
+
+	return ioc3_kbd_setup(ipd);
+}
+
+static int ip27_mio_setup(struct ioc3_priv_data *ipd)
+{
+	int ret;
+
+	ret = ioc3_irq_domain_setup(ipd, ipd->pdev->irq);
+	if (ret)
+		return ret;
+
+	ret = ioc3_serial_setup(ipd);
+	if (ret)
+		return ret;
+
+	return ioc3_kbd_setup(ipd);
+}
+
+static int ip30_sysboard_setup(struct ioc3_priv_data *ipd)
+{
+	int ret, io_irq;
+
+	io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn),
+			      PCI_INTERRUPT_INTB);
+	ret = ioc3_irq_domain_setup(ipd, io_irq);
+	if (ret)
+		return ret;
+
+	ret = ioc3_eth_setup(ipd);
+	if (ret)
+		return ret;
+
+	ret = ioc3_serial_setup(ipd);
+	if (ret)
+		return ret;
+
+	ret = ioc3_kbd_setup(ipd);
+	if (ret)
+		return ret;
+
+	ret = ioc3_ds1685_setup(ipd);
+	if (ret)
+		return ret;
+
+	return ioc3_led_setup(ipd);
+}
+
+static int ioc3_menet_setup(struct ioc3_priv_data *ipd)
+{
+	int ret, io_irq;
+
+	io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn),
+			      PCI_INTERRUPT_INTB);
+	ret = ioc3_irq_domain_setup(ipd, io_irq);
+	if (ret)
+		return ret;
+
+	ret = ioc3_eth_setup(ipd);
+	if (ret)
+		return ret;
+
+	return ioc3_serial_setup(ipd);
+}
+
+static int ioc3_menet4_setup(struct ioc3_priv_data *ipd)
+{
+	return ioc3_eth_setup(ipd);
+}
+
+static int ioc3_cad_duo_setup(struct ioc3_priv_data *ipd)
+{
+	int ret, io_irq;
+
+	io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn),
+			      PCI_INTERRUPT_INTB);
+	ret = ioc3_irq_domain_setup(ipd, io_irq);
+	if (ret)
+		return ret;
+
+	ret = ioc3_eth_setup(ipd);
+	if (ret)
+		return ret;
+
+	return ioc3_kbd_setup(ipd);
+}
+
+/* Helper macro for filling ioc3_info array */
+#define IOC3_SID(_name, _sid, _setup) \
+	{								   \
+		.name = _name,						   \
+		.sid = PCI_VENDOR_ID_SGI | (IOC3_SUBSYS_ ## _sid << 16),   \
+		.setup = _setup,					   \
+	}
+
+static struct {
+	const char *name;
+	u32 sid;
+	int (*setup)(struct ioc3_priv_data *ipd);
+} ioc3_infos[] = {
+	IOC3_SID("IP27 BaseIO6G", IP27_BASEIO6G, &ip27_baseio6g_setup),
+	IOC3_SID("IP27 MIO", IP27_MIO, &ip27_mio_setup),
+	IOC3_SID("IP27 BaseIO", IP27_BASEIO, &ip27_baseio_setup),
+	IOC3_SID("IP29 System Board", IP29_SYSBOARD, &ip27_baseio6g_setup),
+	IOC3_SID("IP30 System Board", IP30_SYSBOARD, &ip30_sysboard_setup),
+	IOC3_SID("MENET", MENET, &ioc3_menet_setup),
+	IOC3_SID("MENET4", MENET4, &ioc3_menet4_setup)
+};
+#undef IOC3_SID
+
+static int ioc3_setup(struct ioc3_priv_data *ipd)
+{
+	u32 sid;
+	int i;
+
+	/* Clear IRQs */
+	writel(~0, &ipd->regs->sio_iec);
+	writel(~0, &ipd->regs->sio_ir);
+	writel(0, &ipd->regs->eth.eier);
+	writel(~0, &ipd->regs->eth.eisr);
+
+	/* Read subsystem vendor id and subsystem id */
+	pci_read_config_dword(ipd->pdev, PCI_SUBSYSTEM_VENDOR_ID, &sid);
+
+	for (i = 0; i < ARRAY_SIZE(ioc3_infos); i++)
+		if (sid == ioc3_infos[i].sid) {
+			pr_info("ioc3: %s\n", ioc3_infos[i].name);
+			return ioc3_infos[i].setup(ipd);
+		}
+
+	/* Treat everything not identified by PCI subid as CAD DUO */
+	pr_info("ioc3: CAD DUO\n");
+	return ioc3_cad_duo_setup(ipd);
+}
+
+static int ioc3_mfd_probe(struct pci_dev *pdev,
+			  const struct pci_device_id *pci_id)
+{
+	struct ioc3_priv_data *ipd;
+	struct ioc3 __iomem *regs;
+	int ret;
+
+	ret = pci_enable_device(pdev);
+	if (ret)
+		return ret;
+
+	pci_write_config_byte(pdev, PCI_LATENCY_TIMER, IOC3_LATENCY);
+	pci_set_master(pdev);
+
+	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (ret) {
+		pr_err("%s: No usable DMA configuration, aborting.\n",
+		       pci_name(pdev));
+		goto out_disable_device;
+	}
+
+	/* Set up per-IOC3 data */
+	ipd = devm_kzalloc(&pdev->dev, sizeof(struct ioc3_priv_data),
+			   GFP_KERNEL);
+	if (!ipd) {
+		ret = -ENOMEM;
+		goto out_disable_device;
+	}
+	ipd->pdev = pdev;
+
+	/*
+	 * Map all IOC3 registers.  These are shared between subdevices
+	 * so the main IOC3 module manages them.
+	 */
+	regs = pci_ioremap_bar(pdev, 0);
+	if (!regs) {
+		dev_warn(&pdev->dev, "ioc3: Unable to remap PCI BAR for %s.\n",
+			 pci_name(pdev));
+		ret = -ENOMEM;
+		goto out_disable_device;
+	}
+	ipd->regs = regs;
+
+	/* Track PCI-device specific data */
+	pci_set_drvdata(pdev, ipd);
+
+	ret = ioc3_setup(ipd);
+	if (ret) {
+		/* Remove all already added MFD devices */
+		mfd_remove_devices(&ipd->pdev->dev);
+		if (ipd->domain) {
+			irq_domain_remove(ipd->domain);
+			free_irq(ipd->domain_irq, (void *)ipd);
+		}
+		pci_iounmap(pdev, regs);
+		goto out_disable_device;
+	}
+
+	return 0;
+
+out_disable_device:
+	pci_disable_device(pdev);
+	return ret;
+}
+
+static void ioc3_mfd_remove(struct pci_dev *pdev)
+{
+	struct ioc3_priv_data *ipd;
+
+	ipd = pci_get_drvdata(pdev);
+
+	/* Clear and disable all IRQs */
+	writel(~0, &ipd->regs->sio_iec);
+	writel(~0, &ipd->regs->sio_ir);
+
+	/* Release resources */
+	mfd_remove_devices(&ipd->pdev->dev);
+	if (ipd->domain) {
+		irq_domain_remove(ipd->domain);
+		free_irq(ipd->domain_irq, (void *)ipd);
+	}
+	pci_iounmap(pdev, ipd->regs);
+	pci_disable_device(pdev);
+}
+
+static struct pci_device_id ioc3_mfd_id_table[] = {
+	{ PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, ioc3_mfd_id_table);
+
+static struct pci_driver ioc3_mfd_driver = {
+	.name = "IOC3",
+	.id_table = ioc3_mfd_id_table,
+	.probe = ioc3_mfd_probe,
+	.remove = ioc3_mfd_remove,
+};
+
+module_pci_driver(ioc3_mfd_driver);
+
+MODULE_AUTHOR("Thomas Bogendoerfer <[e-mail]>");
+MODULE_DESCRIPTION("SGI IOC3 MFD driver");
+MODULE_LICENSE("GPL v2");

drivers/net/ethernet/sgi/Kconfig

···
 config NET_VENDOR_SGI
 	bool "SGI devices"
 	default y
-	depends on (PCI && SGI_IP27) || SGI_IP32
+	depends on (PCI && SGI_MFD_IOC3) ||  SGI_IP32
 	---help---
 	  If you have a network (Ethernet) card belonging to this class, say Y.
 
···
 
 config SGI_IOC3_ETH
 	bool "SGI IOC3 Ethernet"
-	depends on PCI && SGI_IP27
+	depends on PCI && SGI_MFD_IOC3
+	select CRC16
 	select CRC32
 	select MII
 	---help---

drivers/net/ethernet/sgi/ioc3-eth.c

···
  *  o Use prefetching for large packets.  What is a good lower limit for
  *    prefetching?
  *  o Use hardware checksums.
- *  o Convert to using a IOC3 meta driver.
  *  o Which PHYs might possibly be attached to the IOC3 in real live,
  *    which workarounds are required for them?  Do we ever have Lucent's?
  *  o For the 2.5 branch kill the mii-tool ioctls.
···
 #include <linux/mm.h>
 #include <linux/errno.h>
 #include <linux/module.h>
-#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/crc16.h>
 #include <linux/crc32.h>
 #include <linux/mii.h>
 #include <linux/in.h>
···
 #include <linux/tcp.h>
 #include <linux/udp.h>
 #include <linux/gfp.h>
-
-#ifdef CONFIG_SERIAL_8250
-#include <linux/serial_core.h>
-#include <linux/serial_8250.h>
-#include <linux/serial_reg.h>
-#endif
-
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/ethtool.h>
 #include <linux/skbuff.h>
 #include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/nvmem-consumer.h>
 
 #include <net/ip.h>
 
-#include <asm/byteorder.h>
-#include <asm/pgtable.h>
-#include <linux/uaccess.h>
-#include <asm/sn/types.h>
 #include <asm/sn/ioc3.h>
 #include <asm/pci/bridge.h>
+
+#define CRC16_INIT	0
+#define CRC16_VALID	0xb001
 
 /* Number of RX buffers.  This is tunable in the range of 16 <= x < 512.
  * The value must be a power of two.
···
 /* Private per NIC data of the driver.  */
 struct ioc3_private {
 	struct ioc3_ethregs *regs;
-	struct ioc3 *all_regs;
 	struct device *dma_dev;
 	u32 *ssram;
 	unsigned long *rxr;		/* pointer to receiver ring */
···
 	spinlock_t ioc3_lock;
 	struct mii_if_info mii;
 
-	struct net_device *dev;
-	struct pci_dev *pdev;
-
 	/* Members used by autonegotiation  */
 	struct timer_list ioc3_timer;
 };
···
 static void ioc3_free_rx_bufs(struct ioc3_private *ip);
 static inline void ioc3_clean_tx_ring(struct ioc3_private *ip);
 
-static const char ioc3_str[] = "IOC3 Ethernet";
 static const struct ethtool_ops ioc3_ethtool_ops;
-
 
 static inline unsigned long aligned_rx_skb_addr(unsigned long addr)
 {
···
 #define ERBAR_VAL	0
 #endif
 
-#define IOC3_SIZE 0x100000
-
-static inline u32 mcr_pack(u32 pulse, u32 sample)
+static int ioc3eth_nvmem_match(struct device *dev, const void *data)
 {
-	return (pulse << 10) | (sample << 2);
-}
+	const char *name = dev_name(dev);
+	const char *prefix = data;
+	int prefix_len;
 
-static int nic_wait(u32 __iomem *mcr)
-{
-	u32 m;
+	prefix_len = strlen(prefix);
+	if (strlen(name) < (prefix_len + 3))
+		return 0;
 
-	do {
-		m = readl(mcr);
-	} while (!(m & 2));
+	if (memcmp(prefix, name, prefix_len) != 0)
+		return 0;
 
-	return m & 1;
-}
-
-static int nic_reset(u32 __iomem *mcr)
-{
-	int presence;
-
-	writel(mcr_pack(500, 65), mcr);
-	presence = nic_wait(mcr);
-
-	writel(mcr_pack(0, 500), mcr);
-	nic_wait(mcr);
-
-	return presence;
-}
-
-static inline int nic_read_bit(u32 __iomem *mcr)
-{
-	int result;
-
-	writel(mcr_pack(6, 13), mcr);
-	result = nic_wait(mcr);
-	writel(mcr_pack(0, 100), mcr);
-	nic_wait(mcr);
-
-	return result;
-}
-
-static inline void nic_write_bit(u32 __iomem *mcr, int bit)
-{
-	if (bit)
-		writel(mcr_pack(6, 110), mcr);
-	else
-		writel(mcr_pack(80, 30), mcr);
-
-	nic_wait(mcr);
-}
-
-/* Read a byte from an iButton device
- */
-static u32 nic_read_byte(u32 __iomem *mcr)
-{
-	u32 result = 0;
-	int i;
-
-	for (i = 0; i < 8; i++)
-		result = (result >> 1) | (nic_read_bit(mcr) << 7);
-
-	return result;
-}
-
-/* Write a byte to an iButton device
- */
-static void nic_write_byte(u32 __iomem *mcr, int byte)
-{
-	int i, bit;
-
-	for (i = 8; i; i--) {
-		bit = byte & 1;
-		byte >>= 1;
-
-		nic_write_bit(mcr, bit);
-	}
-}
-
-static u64 nic_find(u32 __iomem *mcr, int *last)
-{
-	int a, b, index, disc;
-	u64 address = 0;
-
-	nic_reset(mcr);
-	/* Search ROM.  */
-	nic_write_byte(mcr, 0xf0);
-
-	/* Algorithm from ``Book of iButton Standards''.  */
-	for (index = 0, disc = 0; index < 64; index++) {
-		a = nic_read_bit(mcr);
-		b = nic_read_bit(mcr);
-
-		if (a && b) {
-			pr_warn("NIC search failed (not fatal).\n");
-			*last = 0;
-			return 0;
-		}
-
-		if (!a && !b) {
-			if (index == *last) {
-				address |= 1UL << index;
-			} else if (index > *last) {
-				address &= ~(1UL << index);
-				disc = index;
-			} else if ((address & (1UL << index)) == 0) {
-				disc = index;
-			}
-			nic_write_bit(mcr, address & (1UL << index));
-			continue;
-		} else {
-			if (a)
-				address |= 1UL << index;
-			else
-				address &= ~(1UL << index);
-			nic_write_bit(mcr, a);
-			continue;
-		}
-	}
-
-	*last = disc;
-
-	return address;
-}
-
-static int nic_init(u32 __iomem *mcr)
-{
-	const char *unknown = "unknown";
-	const char *type = unknown;
-	u8 crc;
-	u8 serial[6];
-	int save = 0, i;
-
-	while (1) {
-		u64 reg;
-
-		reg = nic_find(mcr, &save);
-
-		switch (reg & 0xff) {
-		case 0x91:
-			type = "DS1981U";
-			break;
-		default:
-			if (save == 0) {
-				/* Let the caller try again.  */
-				return -1;
-			}
-			continue;
-		}
-
-		nic_reset(mcr);
-
-		/* Match ROM.  */
-		nic_write_byte(mcr, 0x55);
-		for (i = 0; i < 8; i++)
-			nic_write_byte(mcr, (reg >> (i << 3)) & 0xff);
-
-		reg >>= 8; /* Shift out type.  */
-		for (i = 0; i < 6; i++) {
-			serial[i] = reg & 0xff;
-			reg >>= 8;
-		}
-		crc = reg & 0xff;
-		break;
-	}
-
-	pr_info("Found %s NIC", type);
-	if (type != unknown)
-		pr_cont(" registration number %pM, CRC %02x", serial, crc);
-	pr_cont(".\n");
+	/* found nvmem device which is attached to our ioc3
+	 * now check for one wire family code 09, 89 and 91
+	 */
+	if (memcmp(name + prefix_len, "09-", 3) == 0)
+		return 1;
+	if (memcmp(name + prefix_len, "89-", 3) == 0)
+		return 1;
+	if (memcmp(name + prefix_len, "91-", 3) == 0)
+		return 1;
 
 	return 0;
 }
 
-/* Read the NIC (Number-In-a-Can) device used to store the MAC address on
- * SN0 / SN00 nodeboards and PCI cards.
- */
-static void ioc3_get_eaddr_nic(struct ioc3_private *ip)
+static int ioc3eth_get_mac_addr(struct resource *res, u8 mac_addr[6])
 {
-	u32 __iomem *mcr = &ip->all_regs->mcr;
-	int tries = 2; /* There may be some problem with the battery?  */
-	u8 nic[14];
+	struct nvmem_device *nvmem;
+	char prefix[24];
+	u8 prom[16];
+	int ret;
 	int i;
 
-	writel(1 << 21, &ip->all_regs->gpcr_s);
+	snprintf(prefix, sizeof(prefix), "ioc3-%012llx-",
+		 res->start & ~0xffff);
 
-	while (tries--) {
-		if (!nic_init(mcr))
-			break;
-		udelay(500);
-	}
+	nvmem = nvmem_device_find(prefix, ioc3eth_nvmem_match);
+	if (IS_ERR(nvmem))
+		return PTR_ERR(nvmem);
 
-	if (tries < 0) {
-		pr_err("Failed to read MAC address\n");
-		return;
-	}
+	ret = nvmem_device_read(nvmem, 0, 16, prom);
+	nvmem_device_put(nvmem);
+	if (ret < 0)
+		return ret;
 
-	/* Read Memory.  */
-	nic_write_byte(mcr, 0xf0);
-	nic_write_byte(mcr, 0x00);
-	nic_write_byte(mcr, 0x00);
+	/* check, if content is valid */
+	if (prom[0] != 0x0a ||
+	    crc16(CRC16_INIT, prom, 13) != CRC16_VALID)
+		return -EINVAL;
 
-	for (i = 13; i >= 0; i--)
-		nic[i] = nic_read_byte(mcr);
+	for (i = 0; i < 6; i++)
+		mac_addr[i] = prom[10 - i];
 
-	for (i = 2; i < 8; i++)
-		ip->dev->dev_addr[i - 2] = nic[i];
-}
-
-/* Ok, this is hosed by design.  It's necessary to know what machine the
- * NIC is in in order to know how to read the NIC address.  We also have
- * to know if it's a PCI card or a NIC in on the node board ...
- */
-static void ioc3_get_eaddr(struct ioc3_private *ip)
-{
-	ioc3_get_eaddr_nic(ip);
-
-	pr_info("Ethernet address is %pM.\n", ip->dev->dev_addr);
+	return 0;
 }
 
 static void __ioc3_set_mac_address(struct net_device *dev)
···
 	u16 word;
 
 	for (i = 0; i < 32; i++) {
-		word = ioc3_mdio_read(ip->dev, i, MII_PHYSID1);
+		word = ioc3_mdio_read(ip->mii.dev, i, MII_PHYSID1);
 
 		if (word != 0xffff && word != 0x0000) {
 			found = 1;
···
 {
 	struct ioc3_private *ip = netdev_priv(dev);
 
-	if (request_irq(dev->irq, ioc3_interrupt, IRQF_SHARED, ioc3_str, dev)) {
-		netdev_err(dev, "Can't get irq %d\n", dev->irq);
-
-		return -EAGAIN;
-	}
-
 	ip->ehar_h = 0;
 	ip->ehar_l = 0;
 
···
 	return 0;
 }
 
-/* MENET cards have four IOC3 chips, which are attached to two sets of
- * PCI slot resources each: the primary connections are on slots
- * 0..3 and the secondaries are on 4..7
- *
- * All four ethernets are brought out to connectors; six serial ports
- * (a pair from each of the first three IOC3s) are brought out to
- * MiniDINs; all other subdevices are left swinging in the wind, leave
- * them disabled.
- */
-
-static int ioc3_adjacent_is_ioc3(struct pci_dev *pdev, int slot)
-{
-	struct pci_dev *dev = pci_get_slot(pdev->bus, PCI_DEVFN(slot, 0));
-	int ret = 0;
-
-	if (dev) {
-		if (dev->vendor == PCI_VENDOR_ID_SGI &&
-		    dev->device == PCI_DEVICE_ID_SGI_IOC3)
-			ret = 1;
-		pci_dev_put(dev);
-	}
-
-	return ret;
-}
-
-static int ioc3_is_menet(struct pci_dev *pdev)
-{
-	return !pdev->bus->parent &&
-	       ioc3_adjacent_is_ioc3(pdev, 0) &&
-	       ioc3_adjacent_is_ioc3(pdev, 1) &&
-	       ioc3_adjacent_is_ioc3(pdev, 2);
-}
-
-#ifdef CONFIG_SERIAL_8250
-/* Note about serial ports and consoles:
- * For console output, everyone uses the IOC3 UARTA (offset 0x178)
- * connected to the master node (look in ip27_setup_console() and
- * ip27prom_console_write()).
- *
- * For serial (/dev/ttyS0 etc), we can not have hardcoded serial port
- * addresses on a partitioned machine. Since we currently use the ioc3
- * serial ports, we use dynamic serial port discovery that the serial.c
- * driver uses for pci/pnp ports (there is an entry for the SGI ioc3
- * boards in pci_boards[]). Unfortunately, UARTA's pio address is greater
- * than UARTB's, although UARTA on o200s has traditionally been known as
- * port 0. So, we just use one serial port from each ioc3 (since the
- * serial driver adds addresses to get to higher ports).
- *
- * The first one to do a register_console becomes the preferred console
- * (if there is no kernel command line console= directive). /dev/console
- * (ie 5, 1) is then "aliased" into the device number returned by the
- * "device" routine referred to in this console structure
- * (ip27prom_console_dev).
- *
- * Also look in ip27-pci.c:pci_fixup_ioc3() for some comments on working
- * around ioc3 oddities in this respect.
- *
- * The IOC3 serials use a 22MHz clock rate with an additional divider which
- * can be programmed in the SCR register if the DLAB bit is set.
- *
- * Register to interrupt zero because we share the interrupt with
- * the serial driver which we don't properly support yet.
- *
- * Can't use UPF_IOREMAP as the whole of IOC3 resources have already been
- * registered.
- */
-static void ioc3_8250_register(struct ioc3_uartregs __iomem *uart)
-{
-#define COSMISC_CONSTANT 6
-
-	struct uart_8250_port port = {
-		.port = {
-			.irq		= 0,
-			.flags		= UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
-			.iotype		= UPIO_MEM,
-			.regshift	= 0,
-			.uartclk	= (22000000 << 1) / COSMISC_CONSTANT,
-
-			.membase	= (unsigned char __iomem *)uart,
-			.mapbase	= (unsigned long)uart,
-		}
-	};
-	unsigned char lcr;
-
-	lcr = readb(&uart->iu_lcr);
-	writeb(lcr | UART_LCR_DLAB, &uart->iu_lcr);
-	writeb(COSMISC_CONSTANT, &uart->iu_scr);
-	writeb(lcr, &uart->iu_lcr);
-	readb(&uart->iu_lcr);
-	serial8250_register_8250_port(&port);
-}
-
-static void ioc3_serial_probe(struct pci_dev *pdev, struct ioc3 *ioc3)
-{
-	u32 sio_iec;
-
-	/* We need to recognice and treat the fourth MENET serial as it
-	 * does not have an SuperIO chip attached to it, therefore attempting
-	 * to access it will result in bus errors.  We call something an
-	 * MENET if PCI slot 0, 1, 2 and 3 of a master PCI bus all have an IOC3
-	 * in it.  This is paranoid but we want to avoid blowing up on a
-	 * showhorn PCI box that happens to have 4 IOC3 cards in it so it's
-	 * not paranoid enough ...
-	 */
-	if (ioc3_is_menet(pdev) && PCI_SLOT(pdev->devfn) == 3)
-		return;
-
-	/* Switch IOC3 to PIO mode.  It probably already was but let's be
-	 * paranoid
-	 */
-	writel(GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL, &ioc3->gpcr_s);
-	readl(&ioc3->gpcr_s);
-	writel(0, &ioc3->gppr[6]);
-	readl(&ioc3->gppr[6]);
-	writel(0, &ioc3->gppr[7]);
-	readl(&ioc3->gppr[7]);
-	writel(readl(&ioc3->port_a.sscr) & ~SSCR_DMA_EN, &ioc3->port_a.sscr);
-	readl(&ioc3->port_a.sscr);
-	writel(readl(&ioc3->port_b.sscr) & ~SSCR_DMA_EN, &ioc3->port_b.sscr);
-	readl(&ioc3->port_b.sscr);
-	/* Disable all SA/B interrupts except for SA/B_INT in SIO_IEC. */
-	sio_iec = readl(&ioc3->sio_iec);
-	sio_iec &= ~(SIO_IR_SA_TX_MT | SIO_IR_SA_RX_FULL |
-		     SIO_IR_SA_RX_HIGH | SIO_IR_SA_RX_TIMER |
-		     SIO_IR_SA_DELTA_DCD | SIO_IR_SA_DELTA_CTS |
-		     SIO_IR_SA_TX_EXPLICIT | SIO_IR_SA_MEMERR);
-	sio_iec |= SIO_IR_SA_INT;
-	sio_iec &= ~(SIO_IR_SB_TX_MT | SIO_IR_SB_RX_FULL |
-		     SIO_IR_SB_RX_HIGH | SIO_IR_SB_RX_TIMER |
-		     SIO_IR_SB_DELTA_DCD | SIO_IR_SB_DELTA_CTS |
-		     SIO_IR_SB_TX_EXPLICIT | SIO_IR_SB_MEMERR);
-	sio_iec |= SIO_IR_SB_INT;
-	writel(sio_iec, &ioc3->sio_iec);
-	writel(0, &ioc3->port_a.sscr);
-	writel(0, &ioc3->port_b.sscr);
-
-	ioc3_8250_register(&ioc3->sregs.uarta);
-	ioc3_8250_register(&ioc3->sregs.uartb);
-}
-#endif
-
 static const struct net_device_ops ioc3_netdev_ops = {
 	.ndo_open		= ioc3_open,
 	.ndo_stop		= ioc3_close,
···
 	.ndo_set_mac_address	= ioc3_set_mac_address,
 };
 
-static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+static int ioc3eth_probe(struct platform_device *pdev)
 {
-	unsigned int sw_physid1, sw_physid2;
-	struct net_device *dev = NULL;
+	u32 sw_physid1, sw_physid2, vendor, model, rev;
 	struct ioc3_private *ip;
-	struct ioc3 *ioc3;
-	unsigned long ioc3_base, ioc3_size;
-	u32 vendor, model, rev;
+	struct net_device *dev;
+	struct resource *regs;
+	u8 mac_addr[6];
 	int err;
 
-	/* Configure DMA attributes. */
-	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
-	if (err) {
-		pr_err("%s: No usable DMA configuration, aborting.\n",
-		       pci_name(pdev));
-		goto out;
-	}
-
-	if (pci_enable_device(pdev))
-		return -ENODEV;
+	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	/* get mac addr from one wire prom */
+	if (ioc3eth_get_mac_addr(regs, mac_addr))
+		return -EPROBE_DEFER; /* not available yet */
 
 	dev = alloc_etherdev(sizeof(struct ioc3_private));
-	if (!dev) {
-		err = -ENOMEM;
-		goto out_disable;
-	}
-
-	err = pci_request_regions(pdev, "ioc3");
-	if (err)
-		goto out_free;
+	if (!dev)
+		return -ENOMEM;
 
 	SET_NETDEV_DEV(dev, &pdev->dev);
 
 	ip = netdev_priv(dev);
-	ip->dev = dev;
-	ip->dma_dev = &pdev->dev;
-
-	dev->irq = pdev->irq;
-
-	ioc3_base = pci_resource_start(pdev, 0);
-	ioc3_size = pci_resource_len(pdev, 0);
-	ioc3 = (struct ioc3 *)ioremap(ioc3_base, ioc3_size);
-	if (!ioc3) {
-		pr_err("ioc3eth(%s): ioremap failed, goodbye.\n",
-		       pci_name(pdev));
+	ip->dma_dev = pdev->dev.parent;
+	ip->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (!ip->regs) {
 		err = -ENOMEM;
-		goto out_res;
+		goto out_free;
 	}
-	ip->regs = &ioc3->eth;
-	ip->ssram = ioc3->ssram;
-	ip->all_regs = ioc3;
 
-#ifdef CONFIG_SERIAL_8250
-	ioc3_serial_probe(pdev, ioc3);
-#endif
+	ip->ssram = devm_platform_ioremap_resource(pdev, 1);
+	if (!ip->ssram) {
+		err = -ENOMEM;
+		goto out_free;
+	}
+
+	dev->irq = platform_get_irq(pdev, 0);
+	if (dev->irq < 0) {
+		err = dev->irq;
+		goto out_free;
+	}
+
+	if (devm_request_irq(&pdev->dev, dev->irq, ioc3_interrupt,
+			     IRQF_SHARED, "ioc3-eth", dev)) {
+		dev_err(&pdev->dev, "Can't get irq %d\n", dev->irq);
+		err = -ENODEV;
+		goto out_free;
+	}
 
 	spin_lock_init(&ip->ioc3_lock);
 	timer_setup(&ip->ioc3_timer, ioc3_timer, 0);
···
 
 	ioc3_init(dev);
 
-	ip->pdev = pdev;
-
 	ip->mii.phy_id_mask = 0x1f;
 	ip->mii.reg_num_mask = 0x1f;
 	ip->mii.dev = dev;
···
 	ioc3_mii_init(ip);
 
 	if (ip->mii.phy_id == -1) {
-		pr_err("ioc3-eth(%s): Didn't find a PHY, goodbye.\n",
-		       pci_name(pdev));
+		netdev_err(dev, "Didn't find a PHY, goodbye.\n");
 		err = -ENODEV;
 		goto out_stop;
 	}
 
 	ioc3_mii_start(ip);
 	ioc3_ssram_disc(ip);
-	ioc3_get_eaddr(ip);
+	memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
 
 	/* The IOC3-specific entries in the device structure. */
 	dev->watchdog_timeo	= 5 * HZ;
···
 	if (ip->tx_ring)
 		dma_free_coherent(ip->dma_dev, TX_RING_SIZE, ip->tx_ring,
 				  ip->txr_dma);
-out_res:
-	pci_release_regions(pdev);
 out_free:
 	free_netdev(dev);
-out_disable:
-	/* We should call pci_disable_device(pdev); here if the IOC3 wasn't
-	 * such a weird device ...
-	 */
-out:
 	return err;
 }
 
-static void ioc3_remove_one(struct pci_dev *pdev)
+static int ioc3eth_remove(struct platform_device *pdev)
 {
-	struct net_device *dev = pci_get_drvdata(pdev);
+	struct net_device *dev = platform_get_drvdata(pdev);
 	struct ioc3_private *ip = netdev_priv(dev);
 
 	dma_free_coherent(ip->dma_dev, RX_RING_SIZE, ip->rxr, ip->rxr_dma);
···
 
 	unregister_netdev(dev);
 	del_timer_sync(&ip->ioc3_timer);
-
-	iounmap(ip->all_regs);
-	pci_release_regions(pdev);
 	free_netdev(dev);
-	/* We should call pci_disable_device(pdev); here if the IOC3 wasn't
-	 * such a weird device ...
-	 */
+
+	return 0;
 }
 
-static const struct pci_device_id ioc3_pci_tbl[] = {
-	{ PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID },
-	{ 0 }
-};
-MODULE_DEVICE_TABLE(pci, ioc3_pci_tbl);
-
-static struct pci_driver ioc3_driver = {
-	.name		= "ioc3-eth",
-	.id_table	= ioc3_pci_tbl,
-	.probe		= ioc3_probe,
-	.remove		= ioc3_remove_one,
-};
 
 static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
···
 static void ioc3_get_drvinfo(struct net_device *dev,
 			     struct ethtool_drvinfo *info)
 {
-	struct ioc3_private *ip = netdev_priv(dev);
-
 	strlcpy(info->driver, IOC3_NAME, sizeof(info->driver));
 	strlcpy(info->version, IOC3_VERSION, sizeof(info->version));
-	strlcpy(info->bus_info, pci_name(ip->pdev), sizeof(info->bus_info));
+	strlcpy(info->bus_info, pci_name(to_pci_dev(dev->dev.parent)),
+		sizeof(info->bus_info));
 }
 
 static int ioc3_get_link_ksettings(struct net_device *dev,
···
 	spin_unlock_irq(&ip->ioc3_lock);
 }
 
-module_pci_driver(ioc3_driver);
+static struct platform_driver ioc3eth_driver = {
+	.probe  = ioc3eth_probe,
+	.remove = ioc3eth_remove,
+	.driver = {
+		.name = "ioc3-eth",
+	}
+};
+
+module_platform_driver(ioc3eth_driver);
+
 MODULE_AUTHOR("Ralf Baechle <[e-mail]>");
 MODULE_DESCRIPTION("SGI IOC3 Ethernet driver");
 MODULE_LICENSE("GPL");

drivers/rtc/rtc-m48t35.c

···
 
 struct m48t35_rtc {
 	u8	pad[0x7ff8];    /* starts at 0x7ff8 */
+#ifdef CONFIG_SGI_IP27
+	u8	hour;
+	u8	min;
+	u8	sec;
+	u8	control;
+	u8	year;
+	u8	month;
+	u8	date;
+	u8	day;
+#else
 	u8	control;
 	u8	sec;
 	u8	min;
···
 	u8	date;
 	u8	month;
 	u8	year;
+#endif
 };
 
 #define M48T35_RTC_SET		0x80

drivers/soc/lantiq/fpi-bus.c

···
 {
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
-	struct resource *res_xbar;
 	struct regmap *rcu_regmap;
 	void __iomem *xbar_membase;
 	u32 rcu_ahb_endianness_reg_offset;
 	int ret;
 
-	res_xbar = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	xbar_membase = devm_ioremap_resource(dev, res_xbar);
+	xbar_membase = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(xbar_membase))
 		return PTR_ERR(xbar_membase);
 

drivers/tc/tc-driver.c

···
  * system is in its list of supported devices.  Returns the matching
  * tc_device_id structure or %NULL if there is no match.
  */
-const struct tc_device_id *tc_match_device(struct tc_driver *tdrv,
-					   struct tc_dev *tdev)
+static const struct tc_device_id *tc_match_device(struct tc_driver *tdrv,
+						  struct tc_dev *tdev)
 {
 	const struct tc_device_id *id = tdrv->id_table;
 
···
 	}
 	return NULL;
 }
-EXPORT_SYMBOL(tc_match_device);
 
 /**
  * tc_bus_match - Tell if a device structure has a matching

drivers/tty/serial/8250/8250_ioc3.c

···
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SGI IOC3 8250 UART driver
+ *
+ * Copyright (C) 2019 Thomas Bogendoerfer <[e-mail]>
+ *
+ * based on code Copyright (C) 2005 Stanislaw Skowronek <[e-mail]>
+ *               Copyright (C) 2014 Joshua Kinard <[e-mail]>
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+#include "8250.h"
+
+#define IOC3_UARTCLK (22000000 / 3)
+
+struct ioc3_8250_data {
+	int line;
+};
+
+static unsigned int ioc3_serial_in(struct uart_port *p, int offset)
+{
+	return readb(p->membase + (offset ^ 3));
+}
+
+static void ioc3_serial_out(struct uart_port *p, int offset, int value)
+{
+	writeb(value, p->membase + (offset ^ 3));
+}
+
+static int serial8250_ioc3_probe(struct platform_device *pdev)
+{
+	struct ioc3_8250_data *data;
+	struct uart_8250_port up;
+	struct resource *r;
+	void __iomem *membase;
+	int irq, line;
+
+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!r)
+		return -ENODEV;
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	membase = devm_ioremap_nocache(&pdev->dev, r->start, resource_size(r));
+	if (!membase)
+		return -ENOMEM;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		irq = 0; /* no interrupt -> use polling */
+
+	/* Register serial ports with 8250.c */
+	memset(&up, 0, sizeof(struct uart_8250_port));
+	up.port.iotype = UPIO_MEM;
+	up.port.uartclk = IOC3_UARTCLK;
+	up.port.type = PORT_16550A;
+	up.port.irq = irq;
+	up.port.flags = (UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ);
+	up.port.dev = &pdev->dev;
+	up.port.membase = membase;
+	up.port.mapbase = r->start;
+	up.port.serial_in = ioc3_serial_in;
+	up.port.serial_out = ioc3_serial_out;
+	line = serial8250_register_8250_port(&up);
+	if (line < 0)
+		return line;
+
+	platform_set_drvdata(pdev, data);
+	return 0;
+}
+
+static int serial8250_ioc3_remove(struct platform_device *pdev)
+{
+	struct ioc3_8250_data *data = platform_get_drvdata(pdev);
+
+	serial8250_unregister_port(data->line);
+	return 0;
+}
+
+static struct platform_driver serial8250_ioc3_driver = {
+	.probe  = serial8250_ioc3_probe,
+	.remove = serial8250_ioc3_remove,
+	.driver = {
+		.name = "ioc3-serial8250",
+	}
+};
+
+module_platform_driver(serial8250_ioc3_driver);
+
+MODULE_AUTHOR("Thomas Bogendoerfer <[e-mail]>");
+MODULE_DESCRIPTION("SGI IOC3 8250 UART driver");
+MODULE_LICENSE("GPL");

drivers/tty/serial/8250/Kconfig

···
 	  port hardware found on the Emma Mobile line of processors.
 	  If unsure, say N.
 
+config SERIAL_8250_IOC3
+	tristate "SGI IOC3 8250 UART support"
+	depends on SGI_MFD_IOC3 && SERIAL_8250
+	select SERIAL_8250_EXTENDED
+	select SERIAL_8250_SHARE_IRQ
+	help
+	  Enable this if you have a SGI Origin or Octane machine. This module
+	  provides basic serial support by directly driving the UART chip
+	  behind the IOC3 device on those systems.  Maximum baud speed is
+	  38400bps using this driver.
+
 config SERIAL_8250_RT288X
 	bool "Ralink RT288x/RT305x/RT3662/RT3883 serial port support"
 	depends on SERIAL_8250

drivers/tty/serial/8250/Makefile

···
 obj-$(CONFIG_SERIAL_8250_MEN_MCB)	+= 8250_men_mcb.o
 obj-$(CONFIG_SERIAL_8250_DW)		+= 8250_dw.o
 obj-$(CONFIG_SERIAL_8250_EM)		+= 8250_em.o
+obj-$(CONFIG_SERIAL_8250_IOC3)		+= 8250_ioc3.o
 obj-$(CONFIG_SERIAL_8250_OMAP)		+= 8250_omap.o
 obj-$(CONFIG_SERIAL_8250_LPC18XX)	+= 8250_lpc18xx.o
 obj-$(CONFIG_SERIAL_8250_MT6577)	+= 8250_mtk.o