Merge tag 'mips_4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS updates from Paul Burton:

 - kexec support for the generic MIPS platform when running on a CPU
   including the MIPS Coherence Manager & related hardware.

 - Improvements to the definition of memory barriers used around MMIO
   accesses, and fixes in their use.

 - Switch to CONFIG_NO_BOOTMEM from Mike Rapoport, finally dropping
   reliance on the old bootmem code.

 - A number of fixes & improvements for Loongson 3 systems.

 - DT & config updates for the Microsemi Ocelot platform.

 - Workaround to enable USB power on the Netgear WNDR3400v3.

 - Various cleanups & fixes.

* tag 'mips_4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (51 commits)
  MIPS: Cleanup DSP ASE detection
  MIPS: dts: Change upper case to lower case
  MIPS: generic: Add Network, SPI and I2C to ocelot_defconfig
  MIPS: Loongson-3: Fix BRIDGE irq delivery problem
  MIPS: Loongson-3: Fix CPU UART irq delivery problem
  MIPS: Remove unused PREF, PREFE & PREFX macros
  MIPS: lib: Use kernel_pref & user_pref in memcpy()
  MIPS: Remove unused CAT macro
  MIPS: Add kernel_pref & user_pref helpers
  MIPS: Remove unused TTABLE macro
  MIPS: Remove unused PIC macros
  MIPS: Remove unused MOVN & MOVZ macros
  MIPS: Provide actually relaxed MMIO accessors
  MIPS: Enforce strong ordering for MMIO accessors
  MIPS: Correct `mmiowb' barrier for `wbflush' platforms
  MIPS: Define MMIO ordering barriers
  MIPS: mscc: add PCB120 to the ocelot fitImage
  MIPS: mscc: add DT for Ocelot PCB120
  MIPS: memset: Limit excessive `noreorder' assembly mode use
  MIPS: memset: Fix CPU_DADDI_WORKAROUNDS `small_fixup' regression
  ...

arch/mips/Kconfig

@@ -21,6 +21,7 @@ config MIPS
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_CMOS_UPDATE
 	select GENERIC_CPU_AUTOPROBE
+	select GENERIC_IOMAP
 	select GENERIC_IRQ_PROBE
 	select GENERIC_IRQ_SHOW
 	select GENERIC_LIB_ASHLDI3
@@ -28,7 +29,6 @@ config MIPS
 	select GENERIC_LIB_CMPDI2
 	select GENERIC_LIB_LSHRDI3
 	select GENERIC_LIB_UCMPDI2
-	select GENERIC_PCI_IOMAP
 	select GENERIC_SCHED_CLOCK if !CAVIUM_OCTEON_SOC
 	select GENERIC_SMP_IDLE_THREAD
 	select GENERIC_TIME_VSYSCALL
@@ -78,6 +78,7 @@ config MIPS
 	select RTC_LIB if !MACH_LOONGSON64
 	select SYSCTL_EXCEPTION_TRACE
 	select VIRT_TO_BUS
+	select NO_BOOTMEM
 
 menu "Machine selection"
 
@@ -132,6 +133,7 @@ config MIPS_GENERIC
 	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
@@ -1149,6 +1151,7 @@ config NO_IOPORT_MAP
 
 config GENERIC_CSUM
 	bool
+	default y if !CPU_HAS_LOAD_STORE_LR
 
 config GENERIC_ISA_DMA
 	bool
@@ -1367,6 +1370,7 @@ config CPU_LOONGSON3
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_HUGEPAGES
+	select CPU_HAS_LOAD_STORE_LR
 	select WEAK_ORDERING
 	select WEAK_REORDERING_BEYOND_LLSC
 	select MIPS_PGD_C0_CONTEXT
@@ -1443,6 +1447,7 @@ config CPU_MIPS32_R1
 	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
@@ -1460,6 +1465,7 @@ config CPU_MIPS32_R2
 	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
@@ -1478,7 +1484,6 @@ config CPU_MIPS32_R6
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_MSA
-	select GENERIC_CSUM
 	select HAVE_KVM
 	select MIPS_O32_FP64_SUPPORT
 	help
@@ -1491,6 +1496,7 @@ config CPU_MIPS64_R1
 	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
@@ -1510,6 +1516,7 @@ config CPU_MIPS64_R2
 	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
@@ -1531,7 +1538,6 @@ config CPU_MIPS64_R6
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_MSA
-	select GENERIC_CSUM
 	select MIPS_O32_FP64_SUPPORT if 32BIT || MIPS32_O32
 	select HAVE_KVM
 	help
@@ -1544,6 +1550,7 @@ config CPU_R3000
 	bool "R3000"
 	depends on SYS_HAS_CPU_R3000
 	select CPU_HAS_WB
+	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 	help
@@ -1558,12 +1565,14 @@ config CPU_TX39XX
 	bool "R39XX"
 	depends on SYS_HAS_CPU_TX39XX
 	select CPU_SUPPORTS_32BIT_KERNEL
+	select CPU_HAS_LOAD_STORE_LR
 
 config CPU_VR41XX
 	bool "R41xx"
 	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
@@ -1575,6 +1584,7 @@ config CPU_R4300
 	depends on SYS_HAS_CPU_R4300
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
+	select CPU_HAS_LOAD_STORE_LR
 	help
 	  MIPS Technologies R4300-series processors.
 
@@ -1584,6 +1594,7 @@ config CPU_R4X00
 	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.
@@ -1592,6 +1603,7 @@ config CPU_TX49XX
 	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
@@ -1602,6 +1614,7 @@ config CPU_R5000
 	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.
 
@@ -1611,6 +1624,7 @@ config CPU_R5432
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HUGEPAGES
+	select CPU_HAS_LOAD_STORE_LR
 
 config CPU_R5500
 	bool "R5500"
@@ -1618,6 +1632,7 @@ config CPU_R5500
 	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.
@@ -1628,6 +1643,7 @@ config CPU_NEVADA
 	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.
 
@@ -1635,6 +1651,7 @@ config CPU_R8000
 	bool "R8000"
 	depends on SYS_HAS_CPU_R8000
 	select CPU_HAS_PREFETCH
+	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_64BIT_KERNEL
 	help
 	  MIPS Technologies R8000 processors.  Note these processors are
@@ -1644,6 +1661,7 @@ config CPU_R10000
 	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
@@ -1655,6 +1673,7 @@ config CPU_RM7000
 	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
@@ -1663,6 +1682,7 @@ config CPU_RM7000
 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
@@ -1673,6 +1693,7 @@ config CPU_CAVIUM_OCTEON
 	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
@@ -1702,6 +1723,7 @@ config CPU_BMIPS
 	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
@@ -1710,6 +1732,7 @@ config CPU_BMIPS
 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
@@ -1728,6 +1751,7 @@ config CPU_XLP
 	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
@@ -1833,12 +1857,14 @@ config CPU_LOONGSON2
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_HUGEPAGES
 	select ARCH_HAS_PHYS_TO_DMA
+	select CPU_HAS_LOAD_STORE_LR
 
 config CPU_LOONGSON1
 	bool
 	select CPU_MIPS32
 	select CPU_MIPSR1
 	select CPU_HAS_PREFETCH
+	select CPU_HAS_LOAD_STORE_LR
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_CPUFREQ
@@ -2452,6 +2478,13 @@ config XKS01
 config CPU_HAS_RIXI
 	bool
 
+config CPU_HAS_LOAD_STORE_LR
+	bool
+	help
+	  CPU has 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).
+
 #
 # Vectored interrupt mode is an R2 feature
 #
@@ -2899,6 +2932,9 @@ config USE_OF
 	select OF_EARLY_FLATTREE
 	select IRQ_DOMAIN
 
+config UHI_BOOT
+	bool
+
 config BUILTIN_DTB
 	bool
 

arch/mips/Makefile

@@ -13,6 +13,7 @@
 #
 
 archscripts: scripts_basic
+	$(Q)$(MAKE) $(build)=arch/mips/tools elf-entry
 	$(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
 
 KBUILD_DEFCONFIG := 32r2el_defconfig
@@ -230,6 +231,8 @@ toolchain-xpa				:= $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
 cflags-$(toolchain-xpa)			+= -DTOOLCHAIN_SUPPORTS_XPA
 toolchain-crc				:= $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
 cflags-$(toolchain-crc)			+= -DTOOLCHAIN_SUPPORTS_CRC
+toolchain-dsp				:= $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
+cflags-$(toolchain-dsp)			+= -DTOOLCHAIN_SUPPORTS_DSP
 
 #
 # Firmware support
@@ -257,13 +260,7 @@ ifdef CONFIG_PHYSICAL_START
 load-y					= $(CONFIG_PHYSICAL_START)
 endif
 
-# Sign-extend the entry point to 64 bits if retrieved as a 32-bit number.
-entry-y		= $(shell $(OBJDUMP) -f vmlinux 2>/dev/null \
-			| sed -n '/^start address / { \
-				s/^.* //; \
-				s/0x\([0-7].......\)$$/0x00000000\1/; \
-				s/0x\(........\)$$/0xffffffff\1/; p }')
-
+entry-y				= $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
 cflags-y			+= -I$(srctree)/arch/mips/include/asm/mach-generic
 drivers-$(CONFIG_PCI)		+= arch/mips/pci/
 

arch/mips/bcm47xx/workarounds.c

@@ -5,9 +5,8 @@
 #include <bcm47xx_board.h>
 #include <bcm47xx.h>
 
-static void __init bcm47xx_workarounds_netgear_wnr3500l(void)
+static void __init bcm47xx_workarounds_enable_usb_power(int usb_power)
 {
-	const int usb_power = 12;
 	int err;
 
 	err = gpio_request_one(usb_power, GPIOF_OUT_INIT_HIGH, "usb_power");
@@ -23,7 +22,10 @@ void __init bcm47xx_workarounds(void)
 
 	switch (board) {
 	case BCM47XX_BOARD_NETGEAR_WNR3500L:
-		bcm47xx_workarounds_netgear_wnr3500l();
+		bcm47xx_workarounds_enable_usb_power(12);
+		break;
+	case BCM47XX_BOARD_NETGEAR_WNDR3400_V3:
+		bcm47xx_workarounds_enable_usb_power(21);
 		break;
 	default:
 		/* No workaround(s) needed */

arch/mips/bmips/setup.c

@@ -153,8 +153,6 @@ void __init plat_time_init(void)
 	mips_hpt_frequency = freq;
 }
 
-extern const char __appended_dtb;
-
 void __init plat_mem_setup(void)
 {
 	void *dtb;
@@ -164,15 +162,10 @@ void __init plat_mem_setup(void)
 	ioport_resource.start = 0;
 	ioport_resource.end = ~0;
 
-#ifdef CONFIG_MIPS_ELF_APPENDED_DTB
-	if (!fdt_check_header(&__appended_dtb))
-		dtb = (void *)&__appended_dtb;
-	else
-#endif
 	/* intended to somewhat resemble ARM; see Documentation/arm/Booting */
 	if (fw_arg0 == 0 && fw_arg1 == 0xffffffff)
 		dtb = phys_to_virt(fw_arg2);
-	else if (fw_passed_dtb) /* UHI interface */
+	else if (fw_passed_dtb) /* UHI interface or appended dtb */
 		dtb = (void *)fw_passed_dtb;
 	else if (__dtb_start != __dtb_end)
 		dtb = (void *)__dtb_start;

arch/mips/boot/dts/lantiq/danube.dtsi

@@ -10,12 +10,12 @@
 		};
 	};
 
-	biu@1F800000 {
+	biu@1f800000 {
 		#address-cells = <1>;
 		#size-cells = <1>;
 		compatible = "lantiq,biu", "simple-bus";
-		reg = <0x1F800000 0x800000>;
-		ranges = <0x0 0x1F800000 0x7FFFFF>;
+		reg = <0x1f800000 0x800000>;
+		ranges = <0x0 0x1f800000 0x7fffff>;
 
 		icu0: icu@80200 {
 			#interrupt-cells = <1>;
@@ -24,18 +24,18 @@
 			reg = <0x80200 0x120>;
 		};
 
-		watchdog@803F0 {
+		watchdog@803f0 {
 			compatible = "lantiq,wdt";
-			reg = <0x803F0 0x10>;
+			reg = <0x803f0 0x10>;
 		};
 	};
 
-	sram@1F000000 {
+	sram@1f000000 {
 		#address-cells = <1>;
 		#size-cells = <1>;
 		compatible = "lantiq,sram";
-		reg = <0x1F000000 0x800000>;
-		ranges = <0x0 0x1F000000 0x7FFFFF>;
+		reg = <0x1f000000 0x800000>;
+		ranges = <0x0 0x1f000000 0x7fffff>;
 
 		eiu0: eiu@101000 {
 			#interrupt-cells = <1>;
@@ -66,41 +66,41 @@
 		#address-cells = <1>;
 		#size-cells = <1>;
 		compatible = "lantiq,fpi", "simple-bus";
-		ranges = <0x0 0x10000000 0xEEFFFFF>;
-		reg = <0x10000000 0xEF00000>;
+		ranges = <0x0 0x10000000 0xeefffff>;
+		reg = <0x10000000 0xef00000>;
 
-		gptu@E100A00 {
+		gptu@e100a00 {
 			compatible = "lantiq,gptu-xway";
-			reg = <0xE100A00 0x100>;
+			reg = <0xe100a00 0x100>;
 		};
 
-		serial@E100C00 {
+		serial@e100c00 {
 			compatible = "lantiq,asc";
-			reg = <0xE100C00 0x400>;
+			reg = <0xe100c00 0x400>;
 			interrupt-parent = <&icu0>;
 			interrupts = <112 113 114>;
 		};
 
-		dma0: dma@E104100 {
+		dma0: dma@e104100 {
 			compatible = "lantiq,dma-xway";
-			reg = <0xE104100 0x800>;
+			reg = <0xe104100 0x800>;
 		};
 
-		ebu0: ebu@E105300 {
+		ebu0: ebu@e105300 {
 			compatible = "lantiq,ebu-xway";
-			reg = <0xE105300 0x100>;
+			reg = <0xe105300 0x100>;
 		};
 
-		pci0: pci@E105400 {
+		pci0: pci@e105400 {
 			#address-cells = <3>;
 			#size-cells = <2>;
 			#interrupt-cells = <1>;
 			compatible = "lantiq,pci-xway";
 			bus-range = <0x0 0x0>;
 			ranges = <0x2000000 0 0x8000000 0x8000000 0 0x2000000	/* pci memory */
-				  0x1000000 0 0x00000000 0xAE00000 0 0x200000>; /* io space */
+				  0x1000000 0 0x00000000 0xae00000 0 0x200000>; /* io space */
 			reg = <0x7000000 0x8000		/* config space */
-				0xE105400 0x400>;	/* pci bridge */
+				0xe105400 0x400>;	/* pci bridge */
 		};
 	};
 };

arch/mips/boot/dts/lantiq/easy50712.dts

@@ -52,14 +52,14 @@
 			};
 		};
 
-		gpio: pinmux@E100B10 {
+		gpio: pinmux@e100b10 {
 			compatible = "lantiq,danube-pinctrl";
 			pinctrl-names = "default";
 			pinctrl-0 = <&state_default>;
 
 			#gpio-cells = <2>;
 			gpio-controller;
-			reg = <0xE100B10 0xA0>;
+			reg = <0xe100b10 0xa0>;
 
 			state_default: pinmux {
 				stp {
@@ -82,26 +82,26 @@
 			};
 		};
 
-		etop@E180000 {
+		etop@e180000 {
 			compatible = "lantiq,etop-xway";
-			reg = <0xE180000 0x40000>;
+			reg = <0xe180000 0x40000>;
 			interrupt-parent = <&icu0>;
 			interrupts = <73 78>;
 			phy-mode = "rmii";
 			mac-address = [ 00 11 22 33 44 55 ];
 		};
 
-		stp0: stp@E100BB0 {
+		stp0: stp@e100bb0 {
 			#gpio-cells = <2>;
 			compatible = "lantiq,gpio-stp-xway";
 			gpio-controller;
-			reg = <0xE100BB0 0x40>;
+			reg = <0xe100bb0 0x40>;
 
 			lantiq,shadow = <0xfff>;
 			lantiq,groups = <0x3>;
 		};
 
-		pci@E105400 {
+		pci@e105400 {
 			lantiq,bus-clock = <33333333>;
 			interrupt-map-mask = <0xf800 0x0 0x0 0x7>;
 			interrupt-map = <

arch/mips/boot/dts/mscc/Makefile

@@ -1,3 +1,3 @@
-dtb-$(CONFIG_MSCC_OCELOT)	+= ocelot_pcb123.dtb
+dtb-$(CONFIG_MSCC_OCELOT)	+= ocelot_pcb123.dtb ocelot_pcb120.dtb
 
 obj-$(CONFIG_BUILTIN_DTB)	+= $(addsuffix .o, $(dtb-y))

arch/mips/boot/dts/mscc/ocelot.dtsi

@@ -78,6 +78,19 @@
 			status = "disabled";
 		};
 
+		i2c: i2c@100400 {
+			compatible = "mscc,ocelot-i2c", "snps,designware-i2c";
+			pinctrl-0 = <&i2c_pins>;
+			pinctrl-names = "default";
+			reg = <0x100400 0x100>, <0x198 0x8>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <8>;
+			clocks = <&ahb_clk>;
+
+			status = "disabled";
+		};
+
 		uart2: serial@100800 {
 			pinctrl-0 = <&uart2_pins>;
 			pinctrl-names = "default";
@@ -182,6 +195,11 @@
 			interrupts = <13>;
 			#interrupt-cells = <2>;
 
+			i2c_pins: i2c-pins {
+				pins = "GPIO_16", "GPIO_17";
+				function = "twi";
+			};
+
 			uart_pins: uart-pins {
 				pins = "GPIO_6", "GPIO_7";
 				function = "uart";
@@ -196,6 +214,7 @@
 				pins = "GPIO_14", "GPIO_15";
 				function = "miim1";
 			};
+
 		};
 
 		mdio0: mdio@107009c {

arch/mips/boot/dts/mscc/ocelot_pcb120.dts

@@ -0,0 +1,107 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/* Copyright (c) 2017 Microsemi Corporation */
+
+/dts-v1/;
+
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/phy/phy-ocelot-serdes.h>
+#include "ocelot.dtsi"
+
+/ {
+	compatible = "mscc,ocelot-pcb120", "mscc,ocelot";
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x0e000000>;
+	};
+};
+
+&gpio {
+	phy_int_pins: phy_int_pins {
+		pins = "GPIO_4";
+		function = "gpio";
+	};
+};
+
+&mdio0 {
+	status = "okay";
+};
+
+&mdio1 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&miim1>, <&phy_int_pins>;
+
+	phy7: ethernet-phy@0 {
+		reg = <0>;
+		interrupts = <4 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-parent = <&gpio>;
+	};
+	phy6: ethernet-phy@1 {
+		reg = <1>;
+		interrupts = <4 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-parent = <&gpio>;
+	};
+	phy5: ethernet-phy@2 {
+		reg = <2>;
+		interrupts = <4 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-parent = <&gpio>;
+	};
+	phy4: ethernet-phy@3 {
+		reg = <3>;
+		interrupts = <4 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-parent = <&gpio>;
+	};
+};
+
+&port0 {
+	phy-handle = <&phy0>;
+};
+
+&port1 {
+	phy-handle = <&phy1>;
+};
+
+&port2 {
+	phy-handle = <&phy2>;
+};
+
+&port3 {
+	phy-handle = <&phy3>;
+};
+
+&port4 {
+	phy-handle = <&phy7>;
+	phy-mode = "sgmii";
+	phys = <&serdes 4 SERDES1G(2)>;
+};
+
+&port5 {
+	phy-handle = <&phy4>;
+	phy-mode = "sgmii";
+	phys = <&serdes 5 SERDES1G(5)>;
+};
+
+&port6 {
+	phy-handle = <&phy6>;
+	phy-mode = "sgmii";
+	phys = <&serdes 6 SERDES1G(3)>;
+};
+
+&port9 {
+	phy-handle = <&phy5>;
+	phy-mode = "sgmii";
+	phys = <&serdes 9 SERDES1G(4)>;
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&uart2 {
+	status = "okay";
+};

arch/mips/boot/dts/mscc/ocelot_pcb123.dts

@@ -36,6 +36,12 @@
 	};
 };
 
+&i2c {
+	clock-frequency = <100000>;
+	i2c-sda-hold-time-ns = <300>;
+	status = "okay";
+};
+
 &mdio0 {
 	status = "okay";
 };

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

@@ -1180,8 +1180,8 @@ static int octeon_irq_gpio_xlat(struct irq_domain *d,
 		type = IRQ_TYPE_LEVEL_LOW;
 		break;
 	default:
-		pr_err("Error: (%s) Invalid irq trigger specification: %x\n",
-		       node->name,
+		pr_err("Error: (%pOFn) Invalid irq trigger specification: %x\n",
+		       node,
 		       trigger);
 		type = IRQ_TYPE_LEVEL_LOW;
 		break;
@@ -2271,8 +2271,8 @@ static int __init octeon_irq_init_cib(struct device_node *ciu_node,
 
 	parent_irq = irq_of_parse_and_map(ciu_node, 0);
 	if (!parent_irq) {
-		pr_err("ERROR: Couldn't acquire parent_irq for %s\n",
-			ciu_node->name);
+		pr_err("ERROR: Couldn't acquire parent_irq for %pOFn\n",
+			ciu_node);
 		return -EINVAL;
 	}
 
@@ -2283,7 +2283,7 @@ static int __init octeon_irq_init_cib(struct device_node *ciu_node,
 
 	addr = of_get_address(ciu_node, 0, NULL, NULL);
 	if (!addr) {
-		pr_err("ERROR: Couldn't acquire reg(0) %s\n", ciu_node->name);
+		pr_err("ERROR: Couldn't acquire reg(0) %pOFn\n", ciu_node);
 		return -EINVAL;
 	}
 	host_data->raw_reg = (u64)phys_to_virt(
@@ -2291,7 +2291,7 @@ static int __init octeon_irq_init_cib(struct device_node *ciu_node,
 
 	addr = of_get_address(ciu_node, 1, NULL, NULL);
 	if (!addr) {
-		pr_err("ERROR: Couldn't acquire reg(1) %s\n", ciu_node->name);
+		pr_err("ERROR: Couldn't acquire reg(1) %pOFn\n", ciu_node);
 		return -EINVAL;
 	}
 	host_data->en_reg = (u64)phys_to_virt(
@@ -2299,8 +2299,8 @@ static int __init octeon_irq_init_cib(struct device_node *ciu_node,
 
 	r = of_property_read_u32(ciu_node, "cavium,max-bits", &val);
 	if (r) {
-		pr_err("ERROR: Couldn't read cavium,max-bits from %s\n",
-			ciu_node->name);
+		pr_err("ERROR: Couldn't read cavium,max-bits from %pOFn\n",
+			ciu_node);
 		return r;
 	}
 	host_data->max_bits = val;

arch/mips/cavium-octeon/setup.c

@@ -1161,15 +1161,12 @@ void __init device_tree_init(void)
 	bool do_prune;
 	bool fill_mac;
 
-#ifdef CONFIG_MIPS_ELF_APPENDED_DTB
-	if (!fdt_check_header(&__appended_dtb)) {
-		fdt = &__appended_dtb;
+	if (fw_passed_dtb) {
+		fdt = (void *)fw_passed_dtb;
 		do_prune = false;
 		fill_mac = true;
 		pr_info("Using appended Device Tree.\n");
-	} else
-#endif
-	if (octeon_bootinfo->minor_version >= 3 && octeon_bootinfo->fdt_addr) {
+	} else if (octeon_bootinfo->minor_version >= 3 && octeon_bootinfo->fdt_addr) {
 		fdt = phys_to_virt(octeon_bootinfo->fdt_addr);
 		if (fdt_check_header(fdt))
 			panic("Corrupt Device Tree passed to kernel.");

arch/mips/cavium-octeon/smp.c

@@ -15,6 +15,7 @@
 #include <linux/sched/task_stack.h>
 #include <linux/init.h>
 #include <linux/export.h>
+#include <linux/kexec.h>
 
 #include <asm/mmu_context.h>
 #include <asm/time.h>
@@ -424,6 +425,9 @@ const struct plat_smp_ops octeon_smp_ops = {
 	.cpu_disable		= octeon_cpu_disable,
 	.cpu_die		= octeon_cpu_die,
 #endif
+#ifdef CONFIG_KEXEC
+	.kexec_nonboot_cpu	= kexec_nonboot_cpu_jump,
+#endif
 };
 
 static irqreturn_t octeon_78xx_reched_interrupt(int irq, void *dev_id)
@@ -501,6 +505,9 @@ static const struct plat_smp_ops octeon_78xx_smp_ops = {
 	.cpu_disable		= octeon_cpu_disable,
 	.cpu_die		= octeon_cpu_die,
 #endif
+#ifdef CONFIG_KEXEC
+	.kexec_nonboot_cpu	= kexec_nonboot_cpu_jump,
+#endif
 };
 
 void __init octeon_setup_smp(void)

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

@@ -18,17 +18,25 @@ CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
 
-CONFIG_GPIO_SYSFS=y
+CONFIG_NETDEVICES=y
+CONFIG_MSCC_OCELOT_SWITCH=y
+CONFIG_MSCC_OCELOT_SWITCH_OCELOT=y
+CONFIG_MDIO_MSCC_MIIM=y
+CONFIG_MICROSEMI_PHY=y
 
 CONFIG_I2C=y
 CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_MUX=y
+CONFIG_I2C_DESIGNWARE_PLATFORM=y
 
 CONFIG_SPI=y
 CONFIG_SPI_BITBANG=y
 CONFIG_SPI_DESIGNWARE=y
+CONFIG_SPI_DW_MMIO=y
 CONFIG_SPI_SPIDEV=y
 
+CONFIG_GPIO_SYSFS=y
+
 CONFIG_POWER_RESET=y
 CONFIG_POWER_RESET_OCELOT_RESET=y
 

arch/mips/generic/Kconfig

@@ -65,11 +65,11 @@ config FIT_IMAGE_FDT_XILFPGA
 	  Enable this to include the FDT for the MIPSfpga platform
 	  from Imagination Technologies in the FIT kernel image.
 
-config FIT_IMAGE_FDT_OCELOT_PCB123
-	bool "Include FDT for Microsemi Ocelot PCB123"
+config FIT_IMAGE_FDT_OCELOT
+	bool "Include FDT for Microsemi Ocelot development platforms"
 	select MSCC_OCELOT
 	help
-	  Enable this to include the FDT for the Ocelot PCB123 platform
+	  Enable this to include the FDT for the Ocelot development platforms
 	  from Microsemi in the FIT kernel image.
 	  This requires u-boot on the platform.
 

arch/mips/generic/Makefile

@@ -15,5 +15,4 @@ obj-y += proc.o
 obj-$(CONFIG_YAMON_DT_SHIM)		+= yamon-dt.o
 obj-$(CONFIG_LEGACY_BOARD_SEAD3)	+= board-sead3.o
 obj-$(CONFIG_LEGACY_BOARD_OCELOT)	+= board-ocelot.o
-obj-$(CONFIG_KEXEC)			+= kexec.o
 obj-$(CONFIG_VIRT_BOARD_RANCHU)		+= board-ranchu.o

arch/mips/generic/Platform

@@ -16,5 +16,5 @@ all-$(CONFIG_MIPS_GENERIC)	:= vmlinux.gz.itb
 its-y					:= vmlinux.its.S
 its-$(CONFIG_FIT_IMAGE_FDT_BOSTON)	+= board-boston.its.S
 its-$(CONFIG_FIT_IMAGE_FDT_NI169445)	+= board-ni169445.its.S
-its-$(CONFIG_FIT_IMAGE_FDT_OCELOT_PCB123) += board-ocelot_pcb123.its.S
+its-$(CONFIG_FIT_IMAGE_FDT_OCELOT)	+= board-ocelot.its.S
 its-$(CONFIG_FIT_IMAGE_FDT_XILFPGA)	+= board-xilfpga.its.S

arch/mips/generic/board-ocelot_pcb123.its.S → arch/mips/generic/board-ocelot.its.S

@@ -11,6 +11,17 @@
 				algo = "sha1";
 			};
 		};
+
+		fdt@ocelot_pcb120 {
+			description = "MSCC Ocelot PCB120 Device Tree";
+			data = /incbin/("boot/dts/mscc/ocelot_pcb120.dtb");
+			type = "flat_dt";
+			arch = "mips";
+			compression = "none";
+			hash@0 {
+				algo = "sha1";
+			};
+		};
 	};
 
 	configurations {
@@ -19,5 +30,11 @@
 			kernel = "kernel@0";
 			fdt = "fdt@ocelot_pcb123";
 		};
+
+		conf@ocelot_pcb120 {
+			description = "Ocelot Linux kernel";
+			kernel = "kernel@0";
+			fdt = "fdt@ocelot_pcb120";
+		};
 	};
 };

arch/mips/generic/kexec.c

@@ -1,44 +0,0 @@
-/*
- * Copyright (C) 2016 Imagination Technologies
- * Author: Marcin Nowakowski <marcin.nowakowski@mips.com>
- *
- * 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; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#include <linux/kexec.h>
-#include <linux/libfdt.h>
-#include <linux/uaccess.h>
-
-static int generic_kexec_prepare(struct kimage *image)
-{
-	int i;
-
-	for (i = 0; i < image->nr_segments; i++) {
-		struct fdt_header fdt;
-
-		if (image->segment[i].memsz <= sizeof(fdt))
-			continue;
-
-		if (copy_from_user(&fdt, image->segment[i].buf, sizeof(fdt)))
-			continue;
-
-		if (fdt_check_header(&fdt))
-			continue;
-
-		kexec_args[0] = -2;
-		kexec_args[1] = (unsigned long)
-			phys_to_virt((unsigned long)image->segment[i].mem);
-		break;
-	}
-	return 0;
-}
-
-static int __init register_generic_kexec(void)
-{
-	_machine_kexec_prepare = generic_kexec_prepare;
-	return 0;
-}
-arch_initcall(register_generic_kexec);

arch/mips/include/asm/asm-eva.h

@@ -15,6 +15,7 @@
 /* Kernel variants */
 
 #define kernel_cache(op, base)		"cache " op ", " base "\n"
+#define kernel_pref(hint, base)		"pref " hint ", " base "\n"
 #define kernel_ll(reg, addr)		"ll " reg ", " addr "\n"
 #define kernel_sc(reg, addr)		"sc " reg ", " addr "\n"
 #define kernel_lw(reg, addr)		"lw " reg ", " addr "\n"
@@ -51,6 +52,7 @@
 				"	.set	pop\n"
 
 #define user_cache(op, base)		__BUILD_EVA_INSN("cachee", op, base)
+#define user_pref(hint, base)		__BUILD_EVA_INSN("prefe", hint, base)
 #define user_ll(reg, addr)		__BUILD_EVA_INSN("lle", reg, addr)
 #define user_sc(reg, addr)		__BUILD_EVA_INSN("sce", reg, addr)
 #define user_lw(reg, addr)		__BUILD_EVA_INSN("lwe", reg, addr)
@@ -72,6 +74,7 @@
 #else
 
 #define user_cache(op, base)		kernel_cache(op, base)
+#define user_pref(hint, base)		kernel_pref(hint, base)
 #define user_ll(reg, addr)		kernel_ll(reg, addr)
 #define user_sc(reg, addr)		kernel_sc(reg, addr)
 #define user_lw(reg, addr)		kernel_lw(reg, addr)
@@ -99,6 +102,7 @@
 #else /* __ASSEMBLY__ */
 
 #define kernel_cache(op, base)		cache op, base
+#define kernel_pref(hint, base)		pref hint, base
 #define kernel_ll(reg, addr)		ll reg, addr
 #define kernel_sc(reg, addr)		sc reg, addr
 #define kernel_lw(reg, addr)		lw reg, addr
@@ -135,6 +139,7 @@
 				.set	pop;
 
 #define user_cache(op, base)		__BUILD_EVA_INSN(cachee, op, base)
+#define user_pref(hint, base)		__BUILD_EVA_INSN(prefe, hint, base)
 #define user_ll(reg, addr)		__BUILD_EVA_INSN(lle, reg, addr)
 #define user_sc(reg, addr)		__BUILD_EVA_INSN(sce, reg, addr)
 #define user_lw(reg, addr)		__BUILD_EVA_INSN(lwe, reg, addr)
@@ -155,6 +160,7 @@
 #else
 
 #define user_cache(op, base)		kernel_cache(op, base)
+#define user_pref(hint, base)		kernel_pref(hint, base)
 #define user_ll(reg, addr)		kernel_ll(reg, addr)
 #define user_sc(reg, addr)		kernel_sc(reg, addr)
 #define user_lw(reg, addr)		kernel_lw(reg, addr)

arch/mips/include/asm/asm.h

@@ -20,32 +20,6 @@
 #include <asm/sgidefs.h>
 #include <asm/asm-eva.h>
 
-#ifndef CAT
-#ifdef __STDC__
-#define __CAT(str1, str2) str1##str2
-#else
-#define __CAT(str1, str2) str1/**/str2
-#endif
-#define CAT(str1, str2) __CAT(str1, str2)
-#endif
-
-/*
- * PIC specific declarations
- * Not used for the kernel but here seems to be the right place.
- */
-#ifdef __PIC__
-#define CPRESTORE(register)				\
-		.cprestore register
-#define CPADD(register)					\
-		.cpadd	register
-#define CPLOAD(register)				\
-		.cpload register
-#else
-#define CPRESTORE(register)
-#define CPADD(register)
-#define CPLOAD(register)
-#endif
-
 /*
  * LEAF - declare leaf routine
  */
@@ -129,96 +103,6 @@ symbol		=	value
 8:		.asciiz msg;				\
 		.popsection;
 
-/*
- * Build text tables
- */
-#define TTABLE(string)					\
-		.pushsection .text;			\
-		.word	1f;				\
-		.popsection				\
-		.pushsection .data;			\
-1:		.asciiz string;				\
-		.popsection
-
-/*
- * MIPS IV pref instruction.
- * Use with .set noreorder only!
- *
- * MIPS IV implementations are free to treat this as a nop.  The R5000
- * is one of them.  So we should have an option not to use this instruction.
- */
-#ifdef CONFIG_CPU_HAS_PREFETCH
-
-#define PREF(hint,addr)					\
-		.set	push;				\
-		.set	arch=r5000;			\
-		pref	hint, addr;			\
-		.set	pop
-
-#define PREFE(hint, addr)				\
-		.set	push;				\
-		.set	mips0;				\
-		.set	eva;				\
-		prefe	hint, addr;			\
-		.set	pop
-
-#define PREFX(hint,addr)				\
-		.set	push;				\
-		.set	arch=r5000;			\
-		prefx	hint, addr;			\
-		.set	pop
-
-#else /* !CONFIG_CPU_HAS_PREFETCH */
-
-#define PREF(hint, addr)
-#define PREFE(hint, addr)
-#define PREFX(hint, addr)
-
-#endif /* !CONFIG_CPU_HAS_PREFETCH */
-
-/*
- * MIPS ISA IV/V movn/movz instructions and equivalents for older CPUs.
- */
-#if (_MIPS_ISA == _MIPS_ISA_MIPS1)
-#define MOVN(rd, rs, rt)				\
-		.set	push;				\
-		.set	reorder;			\
-		beqz	rt, 9f;				\
-		move	rd, rs;				\
-		.set	pop;				\
-9:
-#define MOVZ(rd, rs, rt)				\
-		.set	push;				\
-		.set	reorder;			\
-		bnez	rt, 9f;				\
-		move	rd, rs;				\
-		.set	pop;				\
-9:
-#endif /* _MIPS_ISA == _MIPS_ISA_MIPS1 */
-#if (_MIPS_ISA == _MIPS_ISA_MIPS2) || (_MIPS_ISA == _MIPS_ISA_MIPS3)
-#define MOVN(rd, rs, rt)				\
-		.set	push;				\
-		.set	noreorder;			\
-		bnezl	rt, 9f;				\
-		 move	rd, rs;				\
-		.set	pop;				\
-9:
-#define MOVZ(rd, rs, rt)				\
-		.set	push;				\
-		.set	noreorder;			\
-		beqzl	rt, 9f;				\
-		 move	rd, rs;				\
-		.set	pop;				\
-9:
-#endif /* (_MIPS_ISA == _MIPS_ISA_MIPS2) || (_MIPS_ISA == _MIPS_ISA_MIPS3) */
-#if (_MIPS_ISA == _MIPS_ISA_MIPS4 ) || (_MIPS_ISA == _MIPS_ISA_MIPS5) || \
-    (_MIPS_ISA == _MIPS_ISA_MIPS32) || (_MIPS_ISA == _MIPS_ISA_MIPS64)
-#define MOVN(rd, rs, rt)				\
-		movn	rd, rs, rt
-#define MOVZ(rd, rs, rt)				\
-		movz	rd, rs, rt
-#endif /* MIPS IV, MIPS V, MIPS32 or MIPS64 */
-
 /*
  * Stack alignment
  */

arch/mips/include/asm/io.h

@@ -20,6 +20,7 @@
 #include <linux/irqflags.h>
 
 #include <asm/addrspace.h>
+#include <asm/barrier.h>
 #include <asm/bug.h>
 #include <asm/byteorder.h>
 #include <asm/cpu.h>
@@ -33,11 +34,6 @@
 #include <ioremap.h>
 #include <mangle-port.h>
 
-/*
- * Slowdown I/O port space accesses for antique hardware.
- */
-#undef CONF_SLOWDOWN_IO
-
 /*
  * Raw operations are never swapped in software.  OTOH values that raw
  * operations are working on may or may not have been swapped by the bus
@@ -50,6 +46,11 @@
 # define __raw_ioswabq(a, x)	(x)
 # define ____raw_ioswabq(a, x)	(x)
 
+# define __relaxed_ioswabb ioswabb
+# define __relaxed_ioswabw ioswabw
+# define __relaxed_ioswabl ioswabl
+# define __relaxed_ioswabq ioswabq
+
 /* ioswab[bwlq], __mem_ioswab[bwlq] are defined in mangle-port.h */
 
 #define IO_SPACE_LIMIT 0xffff
@@ -80,31 +81,29 @@ static inline void set_io_port_base(unsigned long base)
 }
 
 /*
- * Thanks to James van Artsdalen for a better timing-fix than
- * the two short jumps: using outb's to a nonexistent port seems
- * to guarantee better timings even on fast machines.
- *
- * On the other hand, I'd like to be sure of a non-existent port:
- * I feel a bit unsafe about using 0x80 (should be safe, though)
- *
- *		Linus
- *
+ * Provide the necessary definitions for generic iomap. We make use of
+ * mips_io_port_base for iomap(), but we don't reserve any low addresses for
+ * use with I/O ports.
  */
 
-#define __SLOW_DOWN_IO \
-	__asm__ __volatile__( \
-		"sb\t$0,0x80(%0)" \
-		: : "r" (mips_io_port_base));
+#define HAVE_ARCH_PIO_SIZE
+#define PIO_OFFSET	mips_io_port_base
+#define PIO_MASK	IO_SPACE_LIMIT
+#define PIO_RESERVED	0x0UL
 
-#ifdef CONF_SLOWDOWN_IO
-#ifdef REALLY_SLOW_IO
-#define SLOW_DOWN_IO { __SLOW_DOWN_IO; __SLOW_DOWN_IO; __SLOW_DOWN_IO; __SLOW_DOWN_IO; }
-#else
-#define SLOW_DOWN_IO __SLOW_DOWN_IO
-#endif
-#else
-#define SLOW_DOWN_IO
-#endif
+/*
+ * Enforce in-order execution of data I/O.  In the MIPS architecture
+ * these are equivalent to corresponding platform-specific memory
+ * barriers defined in <asm/barrier.h>.  API pinched from PowerPC,
+ * with sync additionally defined.
+ */
+#define iobarrier_rw() mb()
+#define iobarrier_r() rmb()
+#define iobarrier_w() wmb()
+#define iobarrier_sync() iob()
+
+/* Some callers use this older API instead.  */
+#define mmiowb() iobarrier_w()
 
 /*
  *     virt_to_phys    -       map virtual addresses to physical
@@ -172,11 +171,6 @@ static inline void *isa_bus_to_virt(unsigned long address)
 extern void __iomem * __ioremap(phys_addr_t offset, phys_addr_t size, unsigned long flags);
 extern void __iounmap(const volatile void __iomem *addr);
 
-#ifndef CONFIG_PCI
-struct pci_dev;
-static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) {}
-#endif
-
 static inline void __iomem * __ioremap_mode(phys_addr_t offset, unsigned long size,
 	unsigned long flags)
 {
@@ -316,13 +310,13 @@ static inline void iounmap(const volatile void __iomem *addr)
 #undef __IS_KSEG1
 }
 
-#if defined(CONFIG_CPU_CAVIUM_OCTEON) || defined(CONFIG_LOONGSON3_ENHANCEMENT)
+#if defined(CONFIG_CPU_CAVIUM_OCTEON) || defined(CONFIG_CPU_LOONGSON3)
 #define war_io_reorder_wmb()		wmb()
 #else
 #define war_io_reorder_wmb()		barrier()
 #endif
 
-#define __BUILD_MEMORY_SINGLE(pfx, bwlq, type, irq)			\
+#define __BUILD_MEMORY_SINGLE(pfx, bwlq, type, barrier, relax, irq)	\
 									\
 static inline void pfx##write##bwlq(type val,				\
 				    volatile void __iomem *mem)		\
@@ -330,7 +324,10 @@ static inline void pfx##write##bwlq(type val,				\
 	volatile type *__mem;						\
 	type __val;							\
 									\
-	war_io_reorder_wmb();					\
+	if (barrier)							\
+		iobarrier_rw();						\
+	else								\
+		war_io_reorder_wmb();					\
 									\
 	__mem = (void *)__swizzle_addr_##bwlq((unsigned long)(mem));	\
 									\
@@ -367,6 +364,9 @@ static inline type pfx##read##bwlq(const volatile void __iomem *mem)	\
 									\
 	__mem = (void *)__swizzle_addr_##bwlq((unsigned long)(mem));	\
 									\
+	if (barrier)							\
+		iobarrier_rw();						\
+									\
 	if (sizeof(type) != sizeof(u64) || sizeof(u64) == sizeof(long)) \
 		__val = *__mem;						\
 	else if (cpu_has_64bits) {					\
@@ -390,18 +390,22 @@ static inline type pfx##read##bwlq(const volatile void __iomem *mem)	\
 	}								\
 									\
 	/* prevent prefetching of coherent DMA data prematurely */	\
-	rmb();								\
+	if (!relax)							\
+		rmb();							\
 	return pfx##ioswab##bwlq(__mem, __val);				\
 }
 
-#define __BUILD_IOPORT_SINGLE(pfx, bwlq, type, p, slow)			\
+#define __BUILD_IOPORT_SINGLE(pfx, bwlq, type, barrier, relax, p)	\
 									\
 static inline void pfx##out##bwlq##p(type val, unsigned long port)	\
 {									\
 	volatile type *__addr;						\
 	type __val;							\
 									\
-	war_io_reorder_wmb();					\
+	if (barrier)							\
+		iobarrier_rw();						\
+	else								\
+		war_io_reorder_wmb();					\
 									\
 	__addr = (void *)__swizzle_addr_##bwlq(mips_io_port_base + port); \
 									\
@@ -411,7 +415,6 @@ static inline void pfx##out##bwlq##p(type val, unsigned long port)	\
 	BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long));		\
 									\
 	*__addr = __val;						\
-	slow;								\
 }									\
 									\
 static inline type pfx##in##bwlq##p(unsigned long port)			\
@@ -423,23 +426,27 @@ static inline type pfx##in##bwlq##p(unsigned long port)			\
 									\
 	BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long));		\
 									\
+	if (barrier)							\
+		iobarrier_rw();						\
+									\
 	__val = *__addr;						\
-	slow;								\
 									\
 	/* prevent prefetching of coherent DMA data prematurely */	\
-	rmb();								\
+	if (!relax)							\
+		rmb();							\
 	return pfx##ioswab##bwlq(__addr, __val);			\
 }
 
-#define __BUILD_MEMORY_PFX(bus, bwlq, type)				\
+#define __BUILD_MEMORY_PFX(bus, bwlq, type, relax)			\
 									\
-__BUILD_MEMORY_SINGLE(bus, bwlq, type, 1)
+__BUILD_MEMORY_SINGLE(bus, bwlq, type, 1, relax, 1)
 
 #define BUILDIO_MEM(bwlq, type)						\
 									\
-__BUILD_MEMORY_PFX(__raw_, bwlq, type)					\
-__BUILD_MEMORY_PFX(, bwlq, type)					\
-__BUILD_MEMORY_PFX(__mem_, bwlq, type)					\
+__BUILD_MEMORY_PFX(__raw_, bwlq, type, 0)				\
+__BUILD_MEMORY_PFX(__relaxed_, bwlq, type, 1)				\
+__BUILD_MEMORY_PFX(__mem_, bwlq, type, 0)				\
+__BUILD_MEMORY_PFX(, bwlq, type, 0)
 
 BUILDIO_MEM(b, u8)
 BUILDIO_MEM(w, u16)
@@ -447,8 +454,8 @@ BUILDIO_MEM(l, u32)
 BUILDIO_MEM(q, u64)
 
 #define __BUILD_IOPORT_PFX(bus, bwlq, type)				\
-	__BUILD_IOPORT_SINGLE(bus, bwlq, type, ,)			\
-	__BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO)
+	__BUILD_IOPORT_SINGLE(bus, bwlq, type, 1, 0,)			\
+	__BUILD_IOPORT_SINGLE(bus, bwlq, type, 1, 0, _p)
 
 #define BUILDIO_IOPORT(bwlq, type)					\
 	__BUILD_IOPORT_PFX(, bwlq, type)				\
@@ -463,19 +470,19 @@ BUILDIO_IOPORT(q, u64)
 
 #define __BUILDIO(bwlq, type)						\
 									\
-__BUILD_MEMORY_SINGLE(____raw_, bwlq, type, 0)
+__BUILD_MEMORY_SINGLE(____raw_, bwlq, type, 1, 0, 0)
 
 __BUILDIO(q, u64)
 
-#define readb_relaxed			readb
-#define readw_relaxed			readw
-#define readl_relaxed			readl
-#define readq_relaxed			readq
+#define readb_relaxed			__relaxed_readb
+#define readw_relaxed			__relaxed_readw
+#define readl_relaxed			__relaxed_readl
+#define readq_relaxed			__relaxed_readq
 
-#define writeb_relaxed			writeb
-#define writew_relaxed			writew
-#define writel_relaxed			writel
-#define writeq_relaxed			writeq
+#define writeb_relaxed			__relaxed_writeb
+#define writew_relaxed			__relaxed_writew
+#define writel_relaxed			__relaxed_writel
+#define writeq_relaxed			__relaxed_writeq
 
 #define readb_be(addr)							\
 	__raw_readb((__force unsigned *)(addr))
@@ -561,14 +568,6 @@ BUILDSTRING(l, u32)
 BUILDSTRING(q, u64)
 #endif
 
-
-#ifdef CONFIG_CPU_CAVIUM_OCTEON
-#define mmiowb() wmb()
-#else
-/* Depends on MIPS II instruction set */
-#define mmiowb() asm volatile ("sync" ::: "memory")
-#endif
-
 static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
 {
 	memset((void __force *) addr, val, count);

arch/mips/include/asm/kexec.h

@@ -12,11 +12,11 @@
 #include <asm/stacktrace.h>
 
 /* Maximum physical address we can use pages from */
-#define KEXEC_SOURCE_MEMORY_LIMIT (0x20000000)
+#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
 /* Maximum address we can reach in physical address mode */
-#define KEXEC_DESTINATION_MEMORY_LIMIT (0x20000000)
+#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
  /* Maximum address we can use for the control code buffer */
-#define KEXEC_CONTROL_MEMORY_LIMIT (0x20000000)
+#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
 /* Reserve 3*4096 bytes for board-specific info */
 #define KEXEC_CONTROL_PAGE_SIZE (4096 + 3*4096)
 
@@ -39,11 +39,12 @@ extern unsigned long kexec_args[4];
 extern int (*_machine_kexec_prepare)(struct kimage *);
 extern void (*_machine_kexec_shutdown)(void);
 extern void (*_machine_crash_shutdown)(struct pt_regs *regs);
-extern void default_machine_crash_shutdown(struct pt_regs *regs);
+void default_machine_crash_shutdown(struct pt_regs *regs);
+void kexec_nonboot_cpu_jump(void);
+void kexec_reboot(void);
 #ifdef CONFIG_SMP
 extern const unsigned char kexec_smp_wait[];
 extern unsigned long secondary_kexec_args[4];
-extern void (*relocated_kexec_smp_wait) (void *);
 extern atomic_t kexec_ready_to_reboot;
 extern void (*_crash_smp_send_stop)(void);
 #endif

arch/mips/include/asm/mach-loongson64/irq.h

@@ -10,7 +10,7 @@
 #define MIPS_CPU_IRQ_BASE 56
 
 #define LOONGSON_UART_IRQ   (MIPS_CPU_IRQ_BASE + 2) /* UART */
-#define LOONGSON_HT1_IRQ    (MIPS_CPU_IRQ_BASE + 3) /* HT1 */
+#define LOONGSON_BRIDGE_IRQ (MIPS_CPU_IRQ_BASE + 3) /* CASCADE */
 #define LOONGSON_TIMER_IRQ  (MIPS_CPU_IRQ_BASE + 7) /* CPU Timer */
 
 #define LOONGSON_HT1_CFG_BASE		loongson_sysconf.ht_control_base

arch/mips/include/asm/mach-loongson64/kernel-entry-init.h

@@ -11,6 +11,8 @@
 #ifndef __ASM_MACH_LOONGSON64_KERNEL_ENTRY_H
 #define __ASM_MACH_LOONGSON64_KERNEL_ENTRY_H
 
+#include <asm/cpu.h>
+
 /*
  * Override macros used in arch/mips/kernel/head.S.
  */
@@ -26,12 +28,15 @@
 	mfc0	t0, CP0_PAGEGRAIN
 	or	t0, (0x1 << 29)
 	mtc0	t0, CP0_PAGEGRAIN
-#ifdef CONFIG_LOONGSON3_ENHANCEMENT
 	/* Enable STFill Buffer */
+	mfc0	t0, CP0_PRID
+	andi	t0, (PRID_IMP_MASK | PRID_REV_MASK)
+	slti	t0, (PRID_IMP_LOONGSON_64 | PRID_REV_LOONGSON3A_R2)
+	bnez	t0, 1f
 	mfc0	t0, CP0_CONFIG6
 	or	t0, 0x100
 	mtc0	t0, CP0_CONFIG6
-#endif
+1:
 	_ehb
 	.set	pop
 #endif
@@ -52,12 +57,15 @@
 	mfc0	t0, CP0_PAGEGRAIN
 	or	t0, (0x1 << 29)
 	mtc0	t0, CP0_PAGEGRAIN
-#ifdef CONFIG_LOONGSON3_ENHANCEMENT
 	/* Enable STFill Buffer */
+	mfc0	t0, CP0_PRID
+	andi	t0, (PRID_IMP_MASK | PRID_REV_MASK)
+	slti	t0, (PRID_IMP_LOONGSON_64 | PRID_REV_LOONGSON3A_R2)
+	bnez	t0, 1f
 	mfc0	t0, CP0_CONFIG6
 	or	t0, 0x100
 	mtc0	t0, CP0_CONFIG6
-#endif
+1:
 	_ehb
 	.set	pop
 #endif

arch/mips/include/asm/mipsregs.h

@@ -2287,13 +2287,14 @@ do {									\
 	_write_32bit_cp1_register(dest, val, )
 #endif
 
-#ifdef HAVE_AS_DSP
+#ifdef TOOLCHAIN_SUPPORTS_DSP
 #define rddsp(mask)							\
 ({									\
 	unsigned int __dspctl;						\
 									\
 	__asm__ __volatile__(						\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	rddsp	%0, %x1					\n"	\
 	"	.set pop					\n"	\
@@ -2306,6 +2307,7 @@ do {									\
 do {									\
 	__asm__ __volatile__(						\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	wrdsp	%0, %x1					\n"	\
 	"	.set pop					\n"	\
@@ -2318,6 +2320,7 @@ do {									\
 	long mflo0;							\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mflo %0, $ac0					\n"	\
 	"	.set pop					\n" 	\
@@ -2330,6 +2333,7 @@ do {									\
 	long mflo1;							\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mflo %0, $ac1					\n"	\
 	"	.set pop					\n" 	\
@@ -2342,6 +2346,7 @@ do {									\
 	long mflo2;							\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mflo %0, $ac2					\n"	\
 	"	.set pop					\n" 	\
@@ -2354,6 +2359,7 @@ do {									\
 	long mflo3;							\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mflo %0, $ac3					\n"	\
 	"	.set pop					\n" 	\
@@ -2366,6 +2372,7 @@ do {									\
 	long mfhi0;							\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mfhi %0, $ac0					\n"	\
 	"	.set pop					\n" 	\
@@ -2378,6 +2385,7 @@ do {									\
 	long mfhi1;							\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mfhi %0, $ac1					\n"	\
 	"	.set pop					\n" 	\
@@ -2390,6 +2398,7 @@ do {									\
 	long mfhi2;							\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mfhi %0, $ac2					\n"	\
 	"	.set pop					\n" 	\
@@ -2402,6 +2411,7 @@ do {									\
 	long mfhi3;							\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mfhi %0, $ac3					\n"	\
 	"	.set pop					\n" 	\
@@ -2414,6 +2424,7 @@ do {									\
 ({									\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mtlo %0, $ac0					\n"	\
 	"	.set pop					\n"	\
@@ -2425,6 +2436,7 @@ do {									\
 ({									\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mtlo %0, $ac1					\n"	\
 	"	.set pop					\n"	\
@@ -2436,6 +2448,7 @@ do {									\
 ({									\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mtlo %0, $ac2					\n"	\
 	"	.set pop					\n"	\
@@ -2447,6 +2460,7 @@ do {									\
 ({									\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mtlo %0, $ac3					\n"	\
 	"	.set pop					\n"	\
@@ -2458,6 +2472,7 @@ do {									\
 ({									\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mthi %0, $ac0					\n"	\
 	"	.set pop					\n"	\
@@ -2469,6 +2484,7 @@ do {									\
 ({									\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mthi %0, $ac1					\n"	\
 	"	.set pop					\n"	\
@@ -2480,6 +2496,7 @@ do {									\
 ({									\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mthi %0, $ac2					\n"	\
 	"	.set pop					\n"	\
@@ -2491,6 +2508,7 @@ do {									\
 ({									\
 	__asm__(							\
 	"	.set push					\n"	\
+	"	.set " MIPS_ISA_LEVEL "				\n"	\
 	"	.set dsp					\n"	\
 	"	mthi %0, $ac3					\n"	\
 	"	.set pop					\n"	\

arch/mips/include/asm/r4kcache.h

@@ -48,58 +48,14 @@ extern void (*r4k_blast_icache)(void);
 	:								\
 	: "i" (op), "R" (*(unsigned char *)(addr)))
 
-#ifdef CONFIG_MIPS_MT
-
-#define __iflush_prologue						\
-	unsigned long redundance;					\
-	extern int mt_n_iflushes;					\
-	for (redundance = 0; redundance < mt_n_iflushes; redundance++) {
-
-#define __iflush_epilogue						\
-	}
-
-#define __dflush_prologue						\
-	unsigned long redundance;					\
-	extern int mt_n_dflushes;					\
-	for (redundance = 0; redundance < mt_n_dflushes; redundance++) {
-
-#define __dflush_epilogue \
-	}
-
-#define __inv_dflush_prologue __dflush_prologue
-#define __inv_dflush_epilogue __dflush_epilogue
-#define __sflush_prologue {
-#define __sflush_epilogue }
-#define __inv_sflush_prologue __sflush_prologue
-#define __inv_sflush_epilogue __sflush_epilogue
-
-#else /* CONFIG_MIPS_MT */
-
-#define __iflush_prologue {
-#define __iflush_epilogue }
-#define __dflush_prologue {
-#define __dflush_epilogue }
-#define __inv_dflush_prologue {
-#define __inv_dflush_epilogue }
-#define __sflush_prologue {
-#define __sflush_epilogue }
-#define __inv_sflush_prologue {
-#define __inv_sflush_epilogue }
-
-#endif /* CONFIG_MIPS_MT */
-
 static inline void flush_icache_line_indexed(unsigned long addr)
 {
-	__iflush_prologue
 	cache_op(Index_Invalidate_I, addr);
-	__iflush_epilogue
 }
 
 static inline void flush_dcache_line_indexed(unsigned long addr)
 {
-	__dflush_prologue
 	cache_op(Index_Writeback_Inv_D, addr);
-	__dflush_epilogue
 }
 
 static inline void flush_scache_line_indexed(unsigned long addr)
@@ -109,7 +65,6 @@ static inline void flush_scache_line_indexed(unsigned long addr)
 
 static inline void flush_icache_line(unsigned long addr)
 {
-	__iflush_prologue
 	switch (boot_cpu_type()) {
 	case CPU_LOONGSON2:
 		cache_op(Hit_Invalidate_I_Loongson2, addr);
@@ -119,21 +74,16 @@ static inline void flush_icache_line(unsigned long addr)
 		cache_op(Hit_Invalidate_I, addr);
 		break;
 	}
-	__iflush_epilogue
 }
 
 static inline void flush_dcache_line(unsigned long addr)
 {
-	__dflush_prologue
 	cache_op(Hit_Writeback_Inv_D, addr);
-	__dflush_epilogue
 }
 
 static inline void invalidate_dcache_line(unsigned long addr)
 {
-	__dflush_prologue
 	cache_op(Hit_Invalidate_D, addr);
-	__dflush_epilogue
 }
 
 static inline void invalidate_scache_line(unsigned long addr)
@@ -586,13 +536,9 @@ static inline void extra##blast_##pfx##cache##lsize(void)		\
 			       current_cpu_data.desc.waybit;		\
 	unsigned long ws, addr;						\
 									\
-	__##pfx##flush_prologue						\
-									\
 	for (ws = 0; ws < ws_end; ws += ws_inc)				\
 		for (addr = start; addr < end; addr += lsize * 32)	\
 			cache##lsize##_unroll32(addr|ws, indexop);	\
-									\
-	__##pfx##flush_epilogue						\
 }									\
 									\
 static inline void extra##blast_##pfx##cache##lsize##_page(unsigned long page) \
@@ -600,14 +546,10 @@ static inline void extra##blast_##pfx##cache##lsize##_page(unsigned long page) \
 	unsigned long start = page;					\
 	unsigned long end = page + PAGE_SIZE;				\
 									\
-	__##pfx##flush_prologue						\
-									\
 	do {								\
 		cache##lsize##_unroll32(start, hitop);			\
 		start += lsize * 32;					\
 	} while (start < end);						\
-									\
-	__##pfx##flush_epilogue						\
 }									\
 									\
 static inline void extra##blast_##pfx##cache##lsize##_page_indexed(unsigned long page) \
@@ -620,13 +562,9 @@ static inline void extra##blast_##pfx##cache##lsize##_page_indexed(unsigned long
 			       current_cpu_data.desc.waybit;		\
 	unsigned long ws, addr;						\
 									\
-	__##pfx##flush_prologue						\
-									\
 	for (ws = 0; ws < ws_end; ws += ws_inc)				\
 		for (addr = start; addr < end; addr += lsize * 32)	\
 			cache##lsize##_unroll32(addr|ws, indexop);	\
-									\
-	__##pfx##flush_epilogue						\
 }
 
 __BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 16, )
@@ -656,14 +594,10 @@ static inline void blast_##pfx##cache##lsize##_user_page(unsigned long page) \
 	unsigned long start = page;					\
 	unsigned long end = page + PAGE_SIZE;				\
 									\
-	__##pfx##flush_prologue						\
-									\
 	do {								\
 		cache##lsize##_unroll32_user(start, hitop);             \
 		start += lsize * 32;					\
 	} while (start < end);						\
-									\
-	__##pfx##flush_epilogue						\
 }
 
 __BUILD_BLAST_USER_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D,
@@ -685,16 +619,12 @@ static inline void prot##extra##blast_##pfx##cache##_range(unsigned long start,
 	unsigned long addr = start & ~(lsize - 1);			\
 	unsigned long aend = (end - 1) & ~(lsize - 1);			\
 									\
-	__##pfx##flush_prologue						\
-									\
 	while (1) {							\
 		prot##cache_op(hitop, addr);				\
 		if (addr == aend)					\
 			break;						\
 		addr += lsize;						\
 	}								\
-									\
-	__##pfx##flush_epilogue						\
 }
 
 #ifndef CONFIG_EVA
@@ -712,8 +642,6 @@ static inline void protected_blast_##pfx##cache##_range(unsigned long start,\
 	unsigned long addr = start & ~(lsize - 1);			\
 	unsigned long aend = (end - 1) & ~(lsize - 1);			\
 									\
-	__##pfx##flush_prologue						\
-									\
 	if (!uaccess_kernel()) {					\
 		while (1) {						\
 			protected_cachee_op(hitop, addr);		\
@@ -730,7 +658,6 @@ static inline void protected_blast_##pfx##cache##_range(unsigned long start,\
 		}                                                       \
 									\
 	}								\
-	__##pfx##flush_epilogue						\
 }
 
 __BUILD_PROT_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D)

arch/mips/include/asm/smp-ops.h

@@ -33,6 +33,9 @@ struct plat_smp_ops {
 	int (*cpu_disable)(void);
 	void (*cpu_die)(unsigned int cpu);
 #endif
+#ifdef CONFIG_KEXEC
+	void (*kexec_nonboot_cpu)(void);
+#endif
 };
 
 extern void register_smp_ops(const struct plat_smp_ops *ops);

arch/mips/include/asm/smp.h

@@ -91,6 +91,22 @@ static inline void __cpu_die(unsigned int cpu)
 extern void play_dead(void);
 #endif
 
+#ifdef CONFIG_KEXEC
+static inline void kexec_nonboot_cpu(void)
+{
+	extern const struct plat_smp_ops *mp_ops;	/* private */
+
+	return mp_ops->kexec_nonboot_cpu();
+}
+
+static inline void *kexec_nonboot_cpu_func(void)
+{
+	extern const struct plat_smp_ops *mp_ops;	/* private */
+
+	return mp_ops->kexec_nonboot_cpu;
+}
+#endif
+
 /*
  * This function will set up the necessary IPIs for Linux to communicate
  * with the CPUs in mask.

arch/mips/kernel/Makefile

@@ -113,22 +113,4 @@ obj-$(CONFIG_MIPS_CPC)		+= mips-cpc.o
 obj-$(CONFIG_CPU_PM)		+= pm.o
 obj-$(CONFIG_MIPS_CPS_PM)	+= pm-cps.o
 
-#
-# DSP ASE supported for MIPS32 or MIPS64 Release 2 cores only. It is not
-# safe to unconditionnaly use the assembler -mdsp / -mdspr2 switches
-# here because the compiler may use DSP ASE instructions (such as lwx) in
-# code paths where we cannot check that the CPU we are running on supports it.
-# Proper abstraction using HAVE_AS_DSP and macros is done in
-# arch/mips/include/asm/mipsregs.h.
-#
-ifeq ($(CONFIG_CPU_MIPSR2), y)
-CFLAGS_DSP 			= -DHAVE_AS_DSP
-
-CFLAGS_signal.o			= $(CFLAGS_DSP)
-CFLAGS_signal32.o		= $(CFLAGS_DSP)
-CFLAGS_process.o		= $(CFLAGS_DSP)
-CFLAGS_branch.o			= $(CFLAGS_DSP)
-CFLAGS_ptrace.o			= $(CFLAGS_DSP)
-endif
-
 CPPFLAGS_vmlinux.lds		:= $(KBUILD_CFLAGS)

arch/mips/kernel/crash.c

@@ -36,6 +36,9 @@ static void crash_shutdown_secondary(void *passed_regs)
 	if (!cpu_online(cpu))
 		return;
 
+	/* We won't be sent IPIs any more. */
+	set_cpu_online(cpu, false);
+
 	local_irq_disable();
 	if (!cpumask_test_cpu(cpu, &cpus_in_crash))
 		crash_save_cpu(regs, cpu);
@@ -43,7 +46,9 @@ static void crash_shutdown_secondary(void *passed_regs)
 
 	while (!atomic_read(&kexec_ready_to_reboot))
 		cpu_relax();
-	relocated_kexec_smp_wait(NULL);
+
+	kexec_reboot();
+
 	/* NOTREACHED */
 }
 

arch/mips/kernel/head.S

@@ -77,7 +77,7 @@ EXPORT(_stext)
 	 */
 FEXPORT(__kernel_entry)
 	j	kernel_entry
-#endif
+#endif /* CONFIG_BOOT_RAW */
 
 	__REF
 
@@ -94,24 +94,26 @@ NESTED(kernel_entry, 16, sp)			# kernel entry point
 0:
 
 #ifdef CONFIG_USE_OF
-#ifdef CONFIG_MIPS_RAW_APPENDED_DTB
+#if defined(CONFIG_MIPS_RAW_APPENDED_DTB) || \
+	defined(CONFIG_MIPS_ELF_APPENDED_DTB)
+
 	PTR_LA		t2, __appended_dtb
 
 #ifdef CONFIG_CPU_BIG_ENDIAN
 	li		t1, 0xd00dfeed
-#else
+#else  /* !CONFIG_CPU_BIG_ENDIAN */
 	li		t1, 0xedfe0dd0
-#endif
+#endif /* !CONFIG_CPU_BIG_ENDIAN */
 	lw		t0, (t2)
 	beq		t0, t1, dtb_found
-#endif
+#endif /* CONFIG_MIPS_RAW_APPENDED_DTB || CONFIG_MIPS_ELF_APPENDED_DTB */
 	li		t1, -2
 	move		t2, a1
 	beq		a0, t1, dtb_found
 
 	li		t2, 0
 dtb_found:
-#endif
+#endif /* CONFIG_USE_OF */
 	PTR_LA		t0, __bss_start		# clear .bss
 	LONG_S		zero, (t0)
 	PTR_LA		t1, __bss_stop - LONGSIZE
@@ -156,9 +158,9 @@ dtb_found:
 	 * newly sync'd icache.
 	 */
 	jr.hb		v0
-#else
+#else  /* !CONFIG_RELOCATABLE */
 	j		start_kernel
-#endif
+#endif /* !CONFIG_RELOCATABLE */
 	END(kernel_entry)
 
 #ifdef CONFIG_SMP

arch/mips/kernel/machine_kexec.c

@@ -9,6 +9,7 @@
 #include <linux/kexec.h>
 #include <linux/mm.h>
 #include <linux/delay.h>
+#include <linux/libfdt.h>
 
 #include <asm/cacheflush.h>
 #include <asm/page.h>
@@ -19,15 +20,18 @@ extern const size_t relocate_new_kernel_size;
 extern unsigned long kexec_start_address;
 extern unsigned long kexec_indirection_page;
 
-int (*_machine_kexec_prepare)(struct kimage *) = NULL;
-void (*_machine_kexec_shutdown)(void) = NULL;
-void (*_machine_crash_shutdown)(struct pt_regs *regs) = NULL;
+static unsigned long reboot_code_buffer;
+
 #ifdef CONFIG_SMP
-void (*relocated_kexec_smp_wait) (void *);
+static void (*relocated_kexec_smp_wait)(void *);
+
 atomic_t kexec_ready_to_reboot = ATOMIC_INIT(0);
 void (*_crash_smp_send_stop)(void) = NULL;
 #endif
 
+void (*_machine_kexec_shutdown)(void) = NULL;
+void (*_machine_crash_shutdown)(struct pt_regs *regs) = NULL;
+
 static void kexec_image_info(const struct kimage *kimage)
 {
 	unsigned long i;
@@ -48,13 +52,59 @@ static void kexec_image_info(const struct kimage *kimage)
 	}
 }
 
+#ifdef CONFIG_UHI_BOOT
+
+static int uhi_machine_kexec_prepare(struct kimage *kimage)
+{
+	int i;
+
+	/*
+	 * In case DTB file is not passed to the new kernel, a flat device
+	 * tree will be created by kexec tool. It holds modified command
+	 * line for the new kernel.
+	 */
+	for (i = 0; i < kimage->nr_segments; i++) {
+		struct fdt_header fdt;
+
+		if (kimage->segment[i].memsz <= sizeof(fdt))
+			continue;
+
+		if (copy_from_user(&fdt, kimage->segment[i].buf, sizeof(fdt)))
+			continue;
+
+		if (fdt_check_header(&fdt))
+			continue;
+
+		kexec_args[0] = -2;
+		kexec_args[1] = (unsigned long)
+			phys_to_virt((unsigned long)kimage->segment[i].mem);
+		break;
+	}
+
+	return 0;
+}
+
+int (*_machine_kexec_prepare)(struct kimage *) = uhi_machine_kexec_prepare;
+
+#else
+
+int (*_machine_kexec_prepare)(struct kimage *) = NULL;
+
+#endif /* CONFIG_UHI_BOOT */
+
 int
 machine_kexec_prepare(struct kimage *kimage)
 {
+#ifdef CONFIG_SMP
+	if (!kexec_nonboot_cpu_func())
+		return -EINVAL;
+#endif
+
 	kexec_image_info(kimage);
 
 	if (_machine_kexec_prepare)
 		return _machine_kexec_prepare(kimage);
+
 	return 0;
 }
 
@@ -63,11 +113,41 @@ machine_kexec_cleanup(struct kimage *kimage)
 {
 }
 
+#ifdef CONFIG_SMP
+static void kexec_shutdown_secondary(void *param)
+{
+	int cpu = smp_processor_id();
+
+	if (!cpu_online(cpu))
+		return;
+
+	/* We won't be sent IPIs any more. */
+	set_cpu_online(cpu, false);
+
+	local_irq_disable();
+	while (!atomic_read(&kexec_ready_to_reboot))
+		cpu_relax();
+
+	kexec_reboot();
+
+	/* NOTREACHED */
+}
+#endif
+
 void
 machine_shutdown(void)
 {
 	if (_machine_kexec_shutdown)
 		_machine_kexec_shutdown();
+
+#ifdef CONFIG_SMP
+	smp_call_function(kexec_shutdown_secondary, NULL, 0);
+
+	while (num_online_cpus() > 1) {
+		cpu_relax();
+		mdelay(1);
+	}
+#endif
 }
 
 void
@@ -79,12 +159,57 @@ machine_crash_shutdown(struct pt_regs *regs)
 		default_machine_crash_shutdown(regs);
 }
 
-typedef void (*noretfun_t)(void) __noreturn;
+#ifdef CONFIG_SMP
+void kexec_nonboot_cpu_jump(void)
+{
+	local_flush_icache_range((unsigned long)relocated_kexec_smp_wait,
+				 reboot_code_buffer + relocate_new_kernel_size);
+
+	relocated_kexec_smp_wait(NULL);
+}
+#endif
+
+void kexec_reboot(void)
+{
+	void (*do_kexec)(void) __noreturn;
+
+	/*
+	 * We know we were online, and there will be no incoming IPIs at
+	 * this point. Mark online again before rebooting so that the crash
+	 * analysis tool will see us correctly.
+	 */
+	set_cpu_online(smp_processor_id(), true);
+
+	/* Ensure remote CPUs observe that we're online before rebooting. */
+	smp_mb__after_atomic();
+
+#ifdef CONFIG_SMP
+	if (smp_processor_id() > 0) {
+		/*
+		 * Instead of cpu_relax() or wait, this is needed for kexec
+		 * smp reboot. Kdump usually doesn't require an smp new
+		 * kernel, but kexec may do.
+		 */
+		kexec_nonboot_cpu();
+
+		/* NOTREACHED */
+	}
+#endif
+
+	/*
+	 * Make sure we get correct instructions written by the
+	 * machine_kexec() CPU.
+	 */
+	local_flush_icache_range(reboot_code_buffer,
+				 reboot_code_buffer + relocate_new_kernel_size);
+
+	do_kexec = (void *)reboot_code_buffer;
+	do_kexec();
+}
 
 void
 machine_kexec(struct kimage *image)
 {
-	unsigned long reboot_code_buffer;
 	unsigned long entry;
 	unsigned long *ptr;
 
@@ -118,6 +243,9 @@ machine_kexec(struct kimage *image)
 			*ptr = (unsigned long) phys_to_virt(*ptr);
 	}
 
+	/* Mark offline BEFORE disabling local irq. */
+	set_cpu_online(smp_processor_id(), false);
+
 	/*
 	 * we do not want to be bothered.
 	 */
@@ -125,6 +253,7 @@ machine_kexec(struct kimage *image)
 
 	printk("Will call new kernel at %08lx\n", image->start);
 	printk("Bye ...\n");
+	/* Make reboot code buffer available to the boot CPU. */
 	__flush_cache_all();
 #ifdef CONFIG_SMP
 	/* All secondary cpus now may jump to kexec_wait cycle */
@@ -133,5 +262,5 @@ machine_kexec(struct kimage *image)
 	smp_wmb();
 	atomic_set(&kexec_ready_to_reboot, 1);
 #endif
-	((noretfun_t) reboot_code_buffer)();
+	kexec_reboot();
 }

arch/mips/kernel/mips-mt.c

@@ -154,40 +154,6 @@ static int __init config7_set(char *str)
 }
 __setup("config7=", config7_set);
 
-/* Experimental cache flush control parameters that should go away some day */
-int mt_protiflush;
-int mt_protdflush;
-int mt_n_iflushes = 1;
-int mt_n_dflushes = 1;
-
-static int __init set_protiflush(char *s)
-{
-	mt_protiflush = 1;
-	return 1;
-}
-__setup("protiflush", set_protiflush);
-
-static int __init set_protdflush(char *s)
-{
-	mt_protdflush = 1;
-	return 1;
-}
-__setup("protdflush", set_protdflush);
-
-static int __init niflush(char *s)
-{
-	get_option(&s, &mt_n_iflushes);
-	return 1;
-}
-__setup("niflush=", niflush);
-
-static int __init ndflush(char *s)
-{
-	get_option(&s, &mt_n_dflushes);
-	return 1;
-}
-__setup("ndflush=", ndflush);
-
 static unsigned int itc_base;
 
 static int __init set_itc_base(char *str)
@@ -232,16 +198,6 @@ void mips_mt_set_cpuoptions(void)
 		printk("Config7: 0x%08x\n", read_c0_config7());
 	}
 
-	/* Report Cache management debug options */
-	if (mt_protiflush)
-		printk("I-cache flushes single-threaded\n");
-	if (mt_protdflush)
-		printk("D-cache flushes single-threaded\n");
-	if (mt_n_iflushes != 1)
-		printk("I-Cache Flushes Repeated %d times\n", mt_n_iflushes);
-	if (mt_n_dflushes != 1)
-		printk("D-Cache Flushes Repeated %d times\n", mt_n_dflushes);
-
 	if (itc_base != 0) {
 		/*
 		 * Configure ITC mapping.  This code is very
@@ -283,21 +239,6 @@ void mips_mt_set_cpuoptions(void)
 	}
 }
 
-/*
- * Function to protect cache flushes from concurrent execution
- * depends on MP software model chosen.
- */
-
-void mt_cflush_lockdown(void)
-{
-	/* FILL IN VSMP and AP/SP VERSIONS HERE */
-}
-
-void mt_cflush_release(void)
-{
-	/* FILL IN VSMP and AP/SP VERSIONS HERE */
-}
-
 struct class *mt_class;
 
 static int __init mt_init(void)

arch/mips/kernel/relocate.c

@@ -146,7 +146,7 @@ int __init do_relocations(void *kbase_old, void *kbase_new, long offset)
 			break;
 
 		type = (*r >> 24) & 0xff;
-		loc_orig = (void *)(kbase_old + ((*r & 0x00ffffff) << 2));
+		loc_orig = kbase_old + ((*r & 0x00ffffff) << 2);
 		loc_new = RELOCATED(loc_orig);
 
 		if (reloc_handlers_rel[type] == NULL) {

arch/mips/kernel/setup.c

@@ -333,7 +333,7 @@ static void __init finalize_initrd(void)
 
 	maybe_bswap_initrd();
 
-	reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT);
+	memblock_reserve(__pa(initrd_start), size);
 	initrd_below_start_ok = 1;
 
 	pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
@@ -370,20 +370,10 @@ static void __init bootmem_init(void)
 
 #else  /* !CONFIG_SGI_IP27 */
 
-static unsigned long __init bootmap_bytes(unsigned long pages)
-{
-	unsigned long bytes = DIV_ROUND_UP(pages, 8);
-
-	return ALIGN(bytes, sizeof(long));
-}
-
 static void __init bootmem_init(void)
 {
 	unsigned long reserved_end;
-	unsigned long mapstart = ~0UL;
-	unsigned long bootmap_size;
 	phys_addr_t ramstart = PHYS_ADDR_MAX;
-	bool bootmap_valid = false;
 	int i;
 
 	/*
@@ -395,6 +385,8 @@ static void __init bootmem_init(void)
 	init_initrd();
 	reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end));
 
+	memblock_reserve(PHYS_OFFSET, reserved_end << PAGE_SHIFT);
+
 	/*
 	 * max_low_pfn is not a number of pages. The number of pages
 	 * of the system is given by 'max_low_pfn - min_low_pfn'.
@@ -442,9 +434,6 @@ static void __init bootmem_init(void)
 		if (initrd_end && end <= (unsigned long)PFN_UP(__pa(initrd_end)))
 			continue;
 #endif
-		if (start >= mapstart)
-			continue;
-		mapstart = max(reserved_end, start);
 	}
 
 	if (min_low_pfn >= max_low_pfn)
@@ -456,9 +445,11 @@ static void __init bootmem_init(void)
 	/*
 	 * Reserve any memory between the start of RAM and PHYS_OFFSET
 	 */
-	if (ramstart > PHYS_OFFSET)
+	if (ramstart > PHYS_OFFSET) {
 		add_memory_region(PHYS_OFFSET, ramstart - PHYS_OFFSET,
 				  BOOT_MEM_RESERVED);
+		memblock_reserve(PHYS_OFFSET, ramstart - PHYS_OFFSET);
+	}
 
 	if (min_low_pfn > ARCH_PFN_OFFSET) {
 		pr_info("Wasting %lu bytes for tracking %lu unused pages\n",
@@ -483,52 +474,6 @@ static void __init bootmem_init(void)
 		max_low_pfn = PFN_DOWN(HIGHMEM_START);
 	}
 
-#ifdef CONFIG_BLK_DEV_INITRD
-	/*
-	 * mapstart should be after initrd_end
-	 */
-	if (initrd_end)
-		mapstart = max(mapstart, (unsigned long)PFN_UP(__pa(initrd_end)));
-#endif
-
-	/*
-	 * check that mapstart doesn't overlap with any of
-	 * memory regions that have been reserved through eg. DTB
-	 */
-	bootmap_size = bootmap_bytes(max_low_pfn - min_low_pfn);
-
-	bootmap_valid = memory_region_available(PFN_PHYS(mapstart),
-						bootmap_size);
-	for (i = 0; i < boot_mem_map.nr_map && !bootmap_valid; i++) {
-		unsigned long mapstart_addr;
-
-		switch (boot_mem_map.map[i].type) {
-		case BOOT_MEM_RESERVED:
-			mapstart_addr = PFN_ALIGN(boot_mem_map.map[i].addr +
-						boot_mem_map.map[i].size);
-			if (PHYS_PFN(mapstart_addr) < mapstart)
-				break;
-
-			bootmap_valid = memory_region_available(mapstart_addr,
-								bootmap_size);
-			if (bootmap_valid)
-				mapstart = PHYS_PFN(mapstart_addr);
-			break;
-		default:
-			break;
-		}
-	}
-
-	if (!bootmap_valid)
-		panic("No memory area to place a bootmap bitmap");
-
-	/*
-	 * Initialize the boot-time allocator with low memory only.
-	 */
-	if (bootmap_size != init_bootmem_node(NODE_DATA(0), mapstart,
-					 min_low_pfn, max_low_pfn))
-		panic("Unexpected memory size required for bootmap");
-
 	for (i = 0; i < boot_mem_map.nr_map; i++) {
 		unsigned long start, end;
 
@@ -577,9 +522,9 @@ static void __init bootmem_init(void)
 		default:
 			/* Not usable memory */
 			if (start > min_low_pfn && end < max_low_pfn)
-				reserve_bootmem(boot_mem_map.map[i].addr,
-						boot_mem_map.map[i].size,
-						BOOTMEM_DEFAULT);
+				memblock_reserve(boot_mem_map.map[i].addr,
+						boot_mem_map.map[i].size);
+
 			continue;
 		}
 
@@ -602,15 +547,9 @@ static void __init bootmem_init(void)
 		size = end - start;
 
 		/* Register lowmem ranges */
-		free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT);
 		memory_present(0, start, end);
 	}
 
-	/*
-	 * Reserve the bootmap memory.
-	 */
-	reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT);
-
 #ifdef CONFIG_RELOCATABLE
 	/*
 	 * The kernel reserves all memory below its _end symbol as bootmem,
@@ -642,29 +581,6 @@ static void __init bootmem_init(void)
 
 #endif	/* CONFIG_SGI_IP27 */
 
-/*
- * arch_mem_init - initialize memory management subsystem
- *
- *  o plat_mem_setup() detects the memory configuration and will record detected
- *    memory areas using add_memory_region.
- *
- * At this stage the memory configuration of the system is known to the
- * kernel but generic memory management system is still entirely uninitialized.
- *
- *  o bootmem_init()
- *  o sparse_init()
- *  o paging_init()
- *  o dma_contiguous_reserve()
- *
- * At this stage the bootmem allocator is ready to use.
- *
- * NOTE: historically plat_mem_setup did the entire platform initialization.
- *	 This was rather impractical because it meant plat_mem_setup had to
- * get away without any kind of memory allocator.  To keep old code from
- * breaking plat_setup was just renamed to plat_mem_setup and a second platform
- * initialization hook for anything else was introduced.
- */
-
 static int usermem __initdata;
 
 static int __init early_parse_mem(char *p)
@@ -841,6 +757,28 @@ static void __init request_crashkernel(struct resource *res)
 #define BUILTIN_EXTEND_WITH_PROM	\
 	IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND)
 
+/*
+ * arch_mem_init - initialize memory management subsystem
+ *
+ *  o plat_mem_setup() detects the memory configuration and will record detected
+ *    memory areas using add_memory_region.
+ *
+ * At this stage the memory configuration of the system is known to the
+ * kernel but generic memory management system is still entirely uninitialized.
+ *
+ *  o bootmem_init()
+ *  o sparse_init()
+ *  o paging_init()
+ *  o dma_contiguous_reserve()
+ *
+ * At this stage the bootmem allocator is ready to use.
+ *
+ * NOTE: historically plat_mem_setup did the entire platform initialization.
+ *	 This was rather impractical because it meant plat_mem_setup had to
+ * get away without any kind of memory allocator.  To keep old code from
+ * breaking plat_setup was just renamed to plat_mem_setup and a second platform
+ * initialization hook for anything else was introduced.
+ */
 static void __init arch_mem_init(char **cmdline_p)
 {
 	struct memblock_region *reg;
@@ -916,21 +854,29 @@ static void __init arch_mem_init(char **cmdline_p)
 	early_init_fdt_scan_reserved_mem();
 
 	bootmem_init();
+
+	/*
+	 * Prevent memblock from allocating high memory.
+	 * This cannot be done before max_low_pfn is detected, so up
+	 * to this point is possible to only reserve physical memory
+	 * with memblock_reserve; memblock_virt_alloc* can be used
+	 * only after this point
+	 */
+	memblock_set_current_limit(PFN_PHYS(max_low_pfn));
+
 #ifdef CONFIG_PROC_VMCORE
 	if (setup_elfcorehdr && setup_elfcorehdr_size) {
 		printk(KERN_INFO "kdump reserved memory at %lx-%lx\n",
 		       setup_elfcorehdr, setup_elfcorehdr_size);
-		reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size,
-				BOOTMEM_DEFAULT);
+		memblock_reserve(setup_elfcorehdr, setup_elfcorehdr_size);
 	}
 #endif
 
 	mips_parse_crashkernel();
 #ifdef CONFIG_KEXEC
 	if (crashk_res.start != crashk_res.end)
-		reserve_bootmem(crashk_res.start,
-				crashk_res.end - crashk_res.start + 1,
-				BOOTMEM_DEFAULT);
+		memblock_reserve(crashk_res.start,
+				 crashk_res.end - crashk_res.start + 1);
 #endif
 	device_tree_init();
 	sparse_init();
@@ -940,7 +886,7 @@ static void __init arch_mem_init(char **cmdline_p)
 	/* Tell bootmem about cma reserved memblock section */
 	for_each_memblock(reserved, reg)
 		if (reg->size != 0)
-			reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT);
+			memblock_reserve(reg->base, reg->size);
 
 	reserve_bootmem_region(__pa_symbol(&__nosave_begin),
 			__pa_symbol(&__nosave_end)); /* Reserve for hibernation */

arch/mips/kernel/smp-bmips.c

@@ -25,6 +25,7 @@
 #include <linux/linkage.h>
 #include <linux/bug.h>
 #include <linux/kernel.h>
+#include <linux/kexec.h>
 
 #include <asm/time.h>
 #include <asm/pgtable.h>
@@ -423,6 +424,9 @@ const struct plat_smp_ops bmips43xx_smp_ops = {
 	.cpu_disable		= bmips_cpu_disable,
 	.cpu_die		= bmips_cpu_die,
 #endif
+#ifdef CONFIG_KEXEC
+	.kexec_nonboot_cpu	= kexec_nonboot_cpu_jump,
+#endif
 };
 
 const struct plat_smp_ops bmips5000_smp_ops = {
@@ -437,6 +441,9 @@ const struct plat_smp_ops bmips5000_smp_ops = {
 	.cpu_disable		= bmips_cpu_disable,
 	.cpu_die		= bmips_cpu_die,
 #endif
+#ifdef CONFIG_KEXEC
+	.kexec_nonboot_cpu	= kexec_nonboot_cpu_jump,
+#endif
 };
 
 #endif /* CONFIG_SMP */

arch/mips/kernel/smp-cps.c

@@ -398,6 +398,55 @@ static void cps_smp_finish(void)
 	local_irq_enable();
 }
 
+#if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_KEXEC)
+
+enum cpu_death {
+	CPU_DEATH_HALT,
+	CPU_DEATH_POWER,
+};
+
+static void cps_shutdown_this_cpu(enum cpu_death death)
+{
+	unsigned int cpu, core, vpe_id;
+
+	cpu = smp_processor_id();
+	core = cpu_core(&cpu_data[cpu]);
+
+	if (death == CPU_DEATH_HALT) {
+		vpe_id = cpu_vpe_id(&cpu_data[cpu]);
+
+		pr_debug("Halting core %d VP%d\n", core, vpe_id);
+		if (cpu_has_mipsmt) {
+			/* Halt this TC */
+			write_c0_tchalt(TCHALT_H);
+			instruction_hazard();
+		} else if (cpu_has_vp) {
+			write_cpc_cl_vp_stop(1 << vpe_id);
+
+			/* Ensure that the VP_STOP register is written */
+			wmb();
+		}
+	} else {
+		pr_debug("Gating power to core %d\n", core);
+		/* Power down the core */
+		cps_pm_enter_state(CPS_PM_POWER_GATED);
+	}
+}
+
+#ifdef CONFIG_KEXEC
+
+static void cps_kexec_nonboot_cpu(void)
+{
+	if (cpu_has_mipsmt || cpu_has_vp)
+		cps_shutdown_this_cpu(CPU_DEATH_HALT);
+	else
+		cps_shutdown_this_cpu(CPU_DEATH_POWER);
+}
+
+#endif /* CONFIG_KEXEC */
+
+#endif /* CONFIG_HOTPLUG_CPU || CONFIG_KEXEC */
+
 #ifdef CONFIG_HOTPLUG_CPU
 
 static int cps_cpu_disable(void)
@@ -421,19 +470,15 @@ static int cps_cpu_disable(void)
 }
 
 static unsigned cpu_death_sibling;
-static enum {
-	CPU_DEATH_HALT,
-	CPU_DEATH_POWER,
-} cpu_death;
+static enum cpu_death cpu_death;
 
 void play_dead(void)
 {
-	unsigned int cpu, core, vpe_id;
+	unsigned int cpu;
 
 	local_irq_disable();
 	idle_task_exit();
 	cpu = smp_processor_id();
-	core = cpu_core(&cpu_data[cpu]);
 	cpu_death = CPU_DEATH_POWER;
 
 	pr_debug("CPU%d going offline\n", cpu);
@@ -456,25 +501,7 @@ void play_dead(void)
 	/* This CPU has chosen its way out */
 	(void)cpu_report_death();
 
-	if (cpu_death == CPU_DEATH_HALT) {
-		vpe_id = cpu_vpe_id(&cpu_data[cpu]);
-
-		pr_debug("Halting core %d VP%d\n", core, vpe_id);
-		if (cpu_has_mipsmt) {
-			/* Halt this TC */
-			write_c0_tchalt(TCHALT_H);
-			instruction_hazard();
-		} else if (cpu_has_vp) {
-			write_cpc_cl_vp_stop(1 << vpe_id);
-
-			/* Ensure that the VP_STOP register is written */
-			wmb();
-		}
-	} else {
-		pr_debug("Gating power to core %d\n", core);
-		/* Power down the core */
-		cps_pm_enter_state(CPS_PM_POWER_GATED);
-	}
+	cps_shutdown_this_cpu(cpu_death);
 
 	/* This should never be reached */
 	panic("Failed to offline CPU %u", cpu);
@@ -593,6 +620,9 @@ static const struct plat_smp_ops cps_smp_ops = {
 	.cpu_disable		= cps_cpu_disable,
 	.cpu_die		= cps_cpu_die,
 #endif
+#ifdef CONFIG_KEXEC
+	.kexec_nonboot_cpu	= cps_kexec_nonboot_cpu,
+#endif
 };
 
 bool mips_cps_smp_in_use(void)

arch/mips/kernel/traps.c

@@ -29,6 +29,7 @@
 #include <linux/spinlock.h>
 #include <linux/kallsyms.h>
 #include <linux/bootmem.h>
+#include <linux/memblock.h>
 #include <linux/interrupt.h>
 #include <linux/ptrace.h>
 #include <linux/kgdb.h>
@@ -348,7 +349,7 @@ static void __show_regs(const struct pt_regs *regs)
  */
 void show_regs(struct pt_regs *regs)
 {
-	__show_regs((struct pt_regs *)regs);
+	__show_regs(regs);
 	dump_stack();
 }
 
@@ -2260,8 +2261,10 @@ void __init trap_init(void)
 		unsigned long size = 0x200 + VECTORSPACING*64;
 		phys_addr_t ebase_pa;
 
+		memblock_set_bottom_up(true);
 		ebase = (unsigned long)
 			__alloc_bootmem(size, 1 << fls(size), 0);
+		memblock_set_bottom_up(false);
 
 		/*
 		 * Try to ensure ebase resides in KSeg0 if possible.

arch/mips/kernel/unaligned.c

@@ -130,7 +130,7 @@ do {                                                        \
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#ifndef CONFIG_CPU_MIPSR6
+#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
 #define     _LoadW(addr, value, res, type)   \
 do {                                                        \
 		__asm__ __volatile__ (                      \
@@ -151,8 +151,8 @@ do {                                                        \
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#else
-/* MIPSR6 has no lwl instruction */
+#else /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+/* For CPUs without lwl instruction */
 #define     _LoadW(addr, value, res, type) \
 do {                                                        \
 		__asm__ __volatile__ (			    \
@@ -186,7 +186,7 @@ do {                                                        \
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#endif /* CONFIG_CPU_MIPSR6 */
+#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
 
 #define     _LoadHWU(addr, value, res, type) \
 do {                                                        \
@@ -212,7 +212,7 @@ do {                                                        \
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#ifndef CONFIG_CPU_MIPSR6
+#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
 #define     _LoadWU(addr, value, res, type)  \
 do {                                                        \
 		__asm__ __volatile__ (                      \
@@ -255,8 +255,8 @@ do {                                                        \
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#else
-/* MIPSR6 has not lwl and ldl instructions */
+#else /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+/* For CPUs without lwl and ldl instructions */
 #define	    _LoadWU(addr, value, res, type) \
 do {                                                        \
 		__asm__ __volatile__ (			    \
@@ -339,7 +339,7 @@ do {                                                        \
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#endif /* CONFIG_CPU_MIPSR6 */
+#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
 
 
 #define     _StoreHW(addr, value, res, type) \
@@ -365,7 +365,7 @@ do {                                                        \
 			: "r" (value), "r" (addr), "i" (-EFAULT));\
 } while(0)
 
-#ifndef CONFIG_CPU_MIPSR6
+#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
 #define     _StoreW(addr, value, res, type)  \
 do {                                                        \
 		__asm__ __volatile__ (                      \
@@ -406,8 +406,7 @@ do {                                                        \
 		: "r" (value), "r" (addr), "i" (-EFAULT));  \
 } while(0)
 
-#else
-/* MIPSR6 has no swl and sdl instructions */
+#else /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
 #define     _StoreW(addr, value, res, type)  \
 do {                                                        \
 		__asm__ __volatile__ (                      \
@@ -483,7 +482,7 @@ do {                                                        \
 		: "memory");                                \
 } while(0)
 
-#endif /* CONFIG_CPU_MIPSR6 */
+#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
 
 #else /* __BIG_ENDIAN */
 
@@ -509,7 +508,7 @@ do {                                                        \
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#ifndef CONFIG_CPU_MIPSR6
+#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
 #define     _LoadW(addr, value, res, type)   \
 do {                                                        \
 		__asm__ __volatile__ (                      \
@@ -530,8 +529,8 @@ do {                                                        \
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#else
-/* MIPSR6 has no lwl instruction */
+#else  /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+/* For CPUs without lwl instruction */
 #define     _LoadW(addr, value, res, type) \
 do {                                                        \
 		__asm__ __volatile__ (			    \
@@ -565,7 +564,7 @@ do {                                                        \
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#endif /* CONFIG_CPU_MIPSR6 */
+#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
 
 
 #define     _LoadHWU(addr, value, res, type) \
@@ -592,7 +591,7 @@ do {                                                        \
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#ifndef CONFIG_CPU_MIPSR6
+#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
 #define     _LoadWU(addr, value, res, type)  \
 do {                                                        \
 		__asm__ __volatile__ (                      \
@@ -635,8 +634,8 @@ do {                                                        \
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
 
-#else
-/* MIPSR6 has not lwl and ldl instructions */
+#else /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+/* For CPUs without lwl and ldl instructions */
 #define	    _LoadWU(addr, value, res, type) \
 do {                                                        \
 		__asm__ __volatile__ (			    \
@@ -718,7 +717,7 @@ do {                                                        \
 			: "=&r" (value), "=r" (res)	    \
 			: "r" (addr), "i" (-EFAULT));       \
 } while(0)
-#endif /* CONFIG_CPU_MIPSR6 */
+#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
 
 #define     _StoreHW(addr, value, res, type) \
 do {                                                        \
@@ -743,7 +742,7 @@ do {                                                        \
 			: "r" (value), "r" (addr), "i" (-EFAULT));\
 } while(0)
 
-#ifndef CONFIG_CPU_MIPSR6
+#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
 #define     _StoreW(addr, value, res, type)  \
 do {                                                        \
 		__asm__ __volatile__ (                      \
@@ -784,8 +783,8 @@ do {                                                        \
 		: "r" (value), "r" (addr), "i" (-EFAULT));  \
 } while(0)
 
-#else
-/* MIPSR6 has no swl and sdl instructions */
+#else /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
+/* For CPUs without swl and sdl instructions */
 #define     _StoreW(addr, value, res, type)  \
 do {                                                        \
 		__asm__ __volatile__ (                      \
@@ -861,7 +860,7 @@ do {                                                        \
 		: "memory");                                \
 } while(0)
 
-#endif /* CONFIG_CPU_MIPSR6 */
+#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
 #endif
 
 #define LoadHWU(addr, value, res)	_LoadHWU(addr, value, res, kernel)

arch/mips/lib/Makefile

@@ -7,7 +7,7 @@ lib-y	+= bitops.o csum_partial.o delay.o memcpy.o memset.o \
 	   mips-atomic.o strncpy_user.o \
 	   strnlen_user.o uncached.o
 
-obj-y			+= iomap.o iomap_copy.o
+obj-y			+= iomap_copy.o
 obj-$(CONFIG_PCI)	+= iomap-pci.o
 lib-$(CONFIG_GENERIC_CSUM)	:= $(filter-out csum_partial.o, $(lib-y))
 

arch/mips/lib/iomap-pci.c

@@ -44,10 +44,3 @@ void __iomem *__pci_ioport_map(struct pci_dev *dev,
 }
 
 #endif /* CONFIG_PCI_DRIVERS_LEGACY */
-
-void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
-{
-	iounmap(addr);
-}
-
-EXPORT_SYMBOL(pci_iounmap);

arch/mips/lib/iomap.c

@@ -1,227 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Implement the default iomap interfaces
- *
- * (C) Copyright 2004 Linus Torvalds
- * (C) Copyright 2006 Ralf Baechle <ralf@linux-mips.org>
- * (C) Copyright 2007 MIPS Technologies, Inc.
- *     written by Ralf Baechle <ralf@linux-mips.org>
- */
-#include <linux/export.h>
-#include <asm/io.h>
-
-/*
- * Read/write from/to an (offsettable) iomem cookie. It might be a PIO
- * access or a MMIO access, these functions don't care. The info is
- * encoded in the hardware mapping set up by the mapping functions
- * (or the cookie itself, depending on implementation and hw).
- *
- * The generic routines don't assume any hardware mappings, and just
- * encode the PIO/MMIO as part of the cookie. They coldly assume that
- * the MMIO IO mappings are not in the low address range.
- *
- * Architectures for which this is not true can't use this generic
- * implementation and should do their own copy.
- */
-
-#define PIO_MASK	0x0ffffUL
-
-unsigned int ioread8(void __iomem *addr)
-{
-	return readb(addr);
-}
-
-EXPORT_SYMBOL(ioread8);
-
-unsigned int ioread16(void __iomem *addr)
-{
-	return readw(addr);
-}
-
-EXPORT_SYMBOL(ioread16);
-
-unsigned int ioread16be(void __iomem *addr)
-{
-	return be16_to_cpu(__raw_readw(addr));
-}
-
-EXPORT_SYMBOL(ioread16be);
-
-unsigned int ioread32(void __iomem *addr)
-{
-	return readl(addr);
-}
-
-EXPORT_SYMBOL(ioread32);
-
-unsigned int ioread32be(void __iomem *addr)
-{
-	return be32_to_cpu(__raw_readl(addr));
-}
-
-EXPORT_SYMBOL(ioread32be);
-
-void iowrite8(u8 val, void __iomem *addr)
-{
-	writeb(val, addr);
-}
-
-EXPORT_SYMBOL(iowrite8);
-
-void iowrite16(u16 val, void __iomem *addr)
-{
-	writew(val, addr);
-}
-
-EXPORT_SYMBOL(iowrite16);
-
-void iowrite16be(u16 val, void __iomem *addr)
-{
-	__raw_writew(cpu_to_be16(val), addr);
-}
-
-EXPORT_SYMBOL(iowrite16be);
-
-void iowrite32(u32 val, void __iomem *addr)
-{
-	writel(val, addr);
-}
-
-EXPORT_SYMBOL(iowrite32);
-
-void iowrite32be(u32 val, void __iomem *addr)
-{
-	__raw_writel(cpu_to_be32(val), addr);
-}
-
-EXPORT_SYMBOL(iowrite32be);
-
-/*
- * These are the "repeat MMIO read/write" functions.
- * Note the "__mem" accesses, since we want to convert
- * to CPU byte order if the host bus happens to not match the
- * endianness of PCI/ISA (see mach-generic/mangle-port.h).
- */
-static inline void mmio_insb(void __iomem *addr, u8 *dst, int count)
-{
-	while (--count >= 0) {
-		u8 data = __mem_readb(addr);
-		*dst = data;
-		dst++;
-	}
-}
-
-static inline void mmio_insw(void __iomem *addr, u16 *dst, int count)
-{
-	while (--count >= 0) {
-		u16 data = __mem_readw(addr);
-		*dst = data;
-		dst++;
-	}
-}
-
-static inline void mmio_insl(void __iomem *addr, u32 *dst, int count)
-{
-	while (--count >= 0) {
-		u32 data = __mem_readl(addr);
-		*dst = data;
-		dst++;
-	}
-}
-
-static inline void mmio_outsb(void __iomem *addr, const u8 *src, int count)
-{
-	while (--count >= 0) {
-		__mem_writeb(*src, addr);
-		src++;
-	}
-}
-
-static inline void mmio_outsw(void __iomem *addr, const u16 *src, int count)
-{
-	while (--count >= 0) {
-		__mem_writew(*src, addr);
-		src++;
-	}
-}
-
-static inline void mmio_outsl(void __iomem *addr, const u32 *src, int count)
-{
-	while (--count >= 0) {
-		__mem_writel(*src, addr);
-		src++;
-	}
-}
-
-void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
-{
-	mmio_insb(addr, dst, count);
-}
-
-EXPORT_SYMBOL(ioread8_rep);
-
-void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
-{
-	mmio_insw(addr, dst, count);
-}
-
-EXPORT_SYMBOL(ioread16_rep);
-
-void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
-{
-	mmio_insl(addr, dst, count);
-}
-
-EXPORT_SYMBOL(ioread32_rep);
-
-void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
-{
-	mmio_outsb(addr, src, count);
-}
-
-EXPORT_SYMBOL(iowrite8_rep);
-
-void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
-{
-	mmio_outsw(addr, src, count);
-}
-
-EXPORT_SYMBOL(iowrite16_rep);
-
-void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
-{
-	mmio_outsl(addr, src, count);
-}
-
-EXPORT_SYMBOL(iowrite32_rep);
-
-/*
- * Create a virtual mapping cookie for an IO port range
- *
- * This uses the same mapping are as the in/out family which has to be setup
- * by the platform initialization code.
- *
- * Just to make matters somewhat more interesting on MIPS systems with
- * multiple host bridge each will have it's own ioport address space.
- */
-static void __iomem *ioport_map_legacy(unsigned long port, unsigned int nr)
-{
-	return (void __iomem *) (mips_io_port_base + port);
-}
-
-void __iomem *ioport_map(unsigned long port, unsigned int nr)
-{
-	if (port > PIO_MASK)
-		return NULL;
-
-	return ioport_map_legacy(port, nr);
-}
-
-EXPORT_SYMBOL(ioport_map);
-
-void ioport_unmap(void __iomem *addr)
-{
-	/* Nothing to do */
-}
-
-EXPORT_SYMBOL(ioport_unmap);

arch/mips/lib/memcpy.S

@@ -204,9 +204,10 @@
 #define LOADB(reg, addr, handler)	EXC(lb, LD_INSN, reg, addr, handler)
 #define STOREB(reg, addr, handler)	EXC(sb, ST_INSN, reg, addr, handler)
 
-#define _PREF(hint, addr, type)						\
+#ifdef CONFIG_CPU_HAS_PREFETCH
+# define _PREF(hint, addr, type)					\
 	.if \mode == LEGACY_MODE;					\
-		PREF(hint, addr);					\
+		kernel_pref(hint, addr);				\
 	.else;								\
 		.if ((\from == USEROP) && (type == SRC_PREFETCH)) ||	\
 		    ((\to == USEROP) && (type == DST_PREFETCH));	\
@@ -218,12 +219,15 @@
 			 * used later on. Therefore use $v1.		\
 			 */						\
 			.set at=v1;					\
-			PREFE(hint, addr);				\
+			user_pref(hint, addr);				\
 			.set noat;					\
 		.else;							\
-			PREF(hint, addr);				\
+			kernel_pref(hint, addr);			\
 		.endif;							\
 	.endif
+#else
+# define _PREF(hint, addr, type)
+#endif
 
 #define PREFS(hint, addr) _PREF(hint, addr, SRC_PREFETCH)
 #define PREFD(hint, addr) _PREF(hint, addr, DST_PREFETCH)
@@ -297,7 +301,7 @@
 	 and	t0, src, ADDRMASK
 	PREFS(	0, 2*32(src) )
 	PREFD(	1, 2*32(dst) )
-#ifndef CONFIG_CPU_MIPSR6
+#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
 	bnez	t1, .Ldst_unaligned\@
 	 nop
 	bnez	t0, .Lsrc_unaligned_dst_aligned\@
@@ -385,7 +389,7 @@
 	bne	rem, len, 1b
 	.set	noreorder
 
-#ifndef CONFIG_CPU_MIPSR6
+#ifdef CONFIG_CPU_HAS_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
@@ -487,7 +491,7 @@
 	bne	len, rem, 1b
 	.set	noreorder
 
-#endif /* !CONFIG_CPU_MIPSR6 */
+#endif /* CONFIG_CPU_HAS_LOAD_STORE_LR */
 .Lcopy_bytes_checklen\@:
 	beqz	len, .Ldone\@
 	 nop
@@ -516,7 +520,7 @@
 	jr	ra
 	 nop
 
-#ifdef CONFIG_CPU_MIPSR6
+#ifndef CONFIG_CPU_HAS_LOAD_STORE_LR
 .Lcopy_unaligned_bytes\@:
 1:
 	COPY_BYTE(0)
@@ -530,7 +534,7 @@
 	ADD	src, src, 8
 	b	1b
 	 ADD	dst, dst, 8
-#endif /* CONFIG_CPU_MIPSR6 */
+#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
 	.if __memcpy == 1
 	END(memcpy)
 	.set __memcpy, 0

arch/mips/lib/memset.S

@@ -78,7 +78,6 @@
 #endif
 	.endm
 
-	.set	noreorder
 	.align	5
 
 	/*
@@ -94,13 +93,16 @@
 	.endif
 
 	sltiu		t0, a2, STORSIZE	/* very small region? */
+	.set		noreorder
 	bnez		t0, .Lsmall_memset\@
 	 andi		t0, a0, STORMASK	/* aligned? */
+	.set		reorder
 
 #ifdef CONFIG_CPU_MICROMIPS
 	move		t8, a1			/* used by 'swp' instruction */
 	move		t9, a1
 #endif
+	.set		noreorder
 #ifndef CONFIG_CPU_DADDI_WORKAROUNDS
 	beqz		t0, 1f
 	 PTR_SUBU	t0, STORSIZE		/* alignment in bytes */
@@ -111,8 +113,9 @@
 	 PTR_SUBU	t0, AT			/* alignment in bytes */
 	.set		at
 #endif
+	.set		reorder
 
-#ifndef CONFIG_CPU_MIPSR6
+#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
 	R10KCBARRIER(0(ra))
 #ifdef __MIPSEB__
 	EX(LONG_S_L, a1, (a0), .Lfirst_fixup\@)	/* make word/dword aligned */
@@ -122,11 +125,13 @@
 	PTR_SUBU	a0, t0			/* long align ptr */
 	PTR_ADDU	a2, t0			/* correct size */
 
-#else /* CONFIG_CPU_MIPSR6 */
+#else /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
 #define STORE_BYTE(N)				\
 	EX(sb, a1, N(a0), .Lbyte_fixup\@);	\
+	.set		noreorder;		\
 	beqz		t0, 0f;			\
-	PTR_ADDU	t0, 1;
+	 PTR_ADDU	t0, 1;			\
+	.set		reorder;
 
 	PTR_ADDU	a2, t0			/* correct size */
 	PTR_ADDU	t0, 1
@@ -145,19 +150,17 @@
 	ori		a0, STORMASK
 	xori		a0, STORMASK
 	PTR_ADDIU	a0, STORSIZE
-#endif /* CONFIG_CPU_MIPSR6 */
+#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
 1:	ori		t1, a2, 0x3f		/* # of full blocks */
 	xori		t1, 0x3f
+	andi		t0, a2, 0x40-STORSIZE
 	beqz		t1, .Lmemset_partial\@	/* no block to fill */
-	 andi		t0, a2, 0x40-STORSIZE
 
 	PTR_ADDU	t1, a0			/* end address */
-	.set		reorder
 1:	PTR_ADDIU	a0, 64
 	R10KCBARRIER(0(ra))
 	f_fill64 a0, -64, FILL64RG, .Lfwd_fixup\@, \mode
 	bne		t1, a0, 1b
-	.set		noreorder
 
 .Lmemset_partial\@:
 	R10KCBARRIER(0(ra))
@@ -173,20 +176,18 @@
 	PTR_SUBU	t1, AT
 	.set		at
 #endif
+	PTR_ADDU	a0, t0			/* dest ptr */
 	jr		t1
-	 PTR_ADDU	a0, t0			/* dest ptr */
 
-	.set		push
-	.set		noreorder
-	.set		nomacro
 	/* ... but first do longs ... */
 	f_fill64 a0, -64, FILL64RG, .Lpartial_fixup\@, \mode
-2:	.set		pop
-	andi		a2, STORMASK		/* At most one long to go */
+2:	andi		a2, STORMASK		/* At most one long to go */
 
+	.set		noreorder
 	beqz		a2, 1f
-#ifndef CONFIG_CPU_MIPSR6
+#ifdef CONFIG_CPU_HAS_LOAD_STORE_LR
 	 PTR_ADDU	a0, a2			/* What's left */
+	.set		reorder
 	R10KCBARRIER(0(ra))
 #ifdef __MIPSEB__
 	EX(LONG_S_R, a1, -1(a0), .Llast_fixup\@)
@@ -195,6 +196,7 @@
 #endif
 #else
 	 PTR_SUBU	t0, $0, a2
+	.set		reorder
 	move		a2, zero		/* No remaining longs */
 	PTR_ADDIU	t0, 1
 	STORE_BYTE(0)
@@ -210,41 +212,42 @@
 #endif
 0:
 #endif
-1:	jr		ra
-	 move		a2, zero
+1:	move		a2, zero
+	jr		ra
 
 .Lsmall_memset\@:
+	PTR_ADDU	t1, a0, a2
 	beqz		a2, 2f
-	 PTR_ADDU	t1, a0, a2
 
 1:	PTR_ADDIU	a0, 1			/* fill bytewise */
 	R10KCBARRIER(0(ra))
+	.set		noreorder
 	bne		t1, a0, 1b
 	 EX(sb, a1, -1(a0), .Lsmall_fixup\@)
+	.set		reorder
 
-2:	jr		ra			/* done */
-	 move		a2, zero
+2:	move		a2, zero
+	jr		ra			/* done */
 	.if __memset == 1
 	END(memset)
 	.set __memset, 0
 	.hidden __memset
 	.endif
 
-#ifdef CONFIG_CPU_MIPSR6
+#ifndef CONFIG_CPU_HAS_LOAD_STORE_LR
 .Lbyte_fixup\@:
 	/*
 	 * unset_bytes = (#bytes - (#unaligned bytes)) - (-#unaligned bytes remaining + 1) + 1
 	 *      a2     =             a2                -              t0                   + 1
 	 */
 	PTR_SUBU	a2, t0
+	PTR_ADDIU	a2, 1
 	jr		ra
-	 PTR_ADDIU	a2, 1
-#endif /* CONFIG_CPU_MIPSR6 */
+#endif /* !CONFIG_CPU_HAS_LOAD_STORE_LR */
 
 .Lfirst_fixup\@:
 	/* unset_bytes already in a2 */
 	jr	ra
-	 nop
 
 .Lfwd_fixup\@:
 	/*
@@ -255,8 +258,8 @@
 	andi		a2, 0x3f
 	LONG_L		t0, THREAD_BUADDR(t0)
 	LONG_ADDU	a2, t1
+	LONG_SUBU	a2, t0
 	jr		ra
-	 LONG_SUBU	a2, t0
 
 .Lpartial_fixup\@:
 	/*
@@ -267,24 +270,21 @@
 	andi		a2, STORMASK
 	LONG_L		t0, THREAD_BUADDR(t0)
 	LONG_ADDU	a2, a0
+	LONG_SUBU	a2, t0
 	jr		ra
-	 LONG_SUBU	a2, t0
 
 .Llast_fixup\@:
 	/* unset_bytes already in a2 */
 	jr		ra
-	 nop
 
 .Lsmall_fixup\@:
 	/*
 	 * unset_bytes = end_addr - current_addr + 1
 	 *      a2     =    t1    -      a0      + 1
 	 */
-	.set		reorder
 	PTR_SUBU	a2, t1, a0
 	PTR_ADDIU	a2, 1
 	jr		ra
-	.set		noreorder
 
 	.endm
 
@@ -298,8 +298,8 @@
 
 LEAF(memset)
 EXPORT_SYMBOL(memset)
+	move		v0, a0			/* result */
 	beqz		a1, 1f
-	 move		v0, a0			/* result */
 
 	andi		a1, 0xff		/* spread fillword */
 	LONG_SLL		t1, a1, 8

arch/mips/loongson64/common/Makefile

@@ -6,7 +6,6 @@
 obj-y += setup.o init.o cmdline.o env.o time.o reset.o irq.o \
     bonito-irq.o mem.o machtype.o platform.o serial.o
 obj-$(CONFIG_PCI) += pci.o
-obj-$(CONFIG_CPU_LOONGSON2) += dma.o
 
 #
 # Serial port support

arch/mips/loongson64/fuloong-2e/Makefile

@@ -2,4 +2,4 @@
 # Makefile for Lemote Fuloong2e mini-PC board.
 #
 
-obj-y += irq.o reset.o
+obj-y += irq.o reset.o dma.o

arch/mips/loongson64/fuloong-2e/dma.c

@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/dma-direct.h>
+
+dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
+{
+	return paddr | 0x80000000;
+}
+
+phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dma_addr)
+{
+	return dma_addr & 0x7fffffff;
+}

arch/mips/loongson64/lemote-2f/Makefile

@@ -2,7 +2,7 @@
 # Makefile for lemote loongson2f family machines
 #
 
-obj-y += clock.o machtype.o irq.o reset.o ec_kb3310b.o
+obj-y += clock.o machtype.o irq.o reset.o dma.o ec_kb3310b.o
 
 #
 # Suspend Support

arch/mips/loongson64/common/dma.c → arch/mips/loongson64/lemote-2f/dma.c

@@ -8,11 +8,7 @@ dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
 
 phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dma_addr)
 {
-#if defined(CONFIG_CPU_LOONGSON2F) && defined(CONFIG_64BIT)
 	if (dma_addr > 0x8fffffff)
 		return dma_addr;
 	return dma_addr & 0x0fffffff;
-#else
-	return dma_addr & 0x7fffffff;
-#endif
 }

arch/mips/loongson64/loongson-3/irq.c

@@ -96,51 +96,8 @@ void mach_irq_dispatch(unsigned int pending)
 	}
 }
 
-static struct irqaction cascade_irqaction = {
-	.handler = no_action,
-	.flags = IRQF_NO_SUSPEND,
-	.name = "cascade",
-};
-
-static inline void mask_loongson_irq(struct irq_data *d)
-{
-	clear_c0_status(0x100 << (d->irq - MIPS_CPU_IRQ_BASE));
-	irq_disable_hazard();
-
-	/* Workaround: UART IRQ may deliver to any core */
-	if (d->irq == LOONGSON_UART_IRQ) {
-		int cpu = smp_processor_id();
-		int node_id = cpu_logical_map(cpu) / loongson_sysconf.cores_per_node;
-		int core_id = cpu_logical_map(cpu) % loongson_sysconf.cores_per_node;
-		u64 intenclr_addr = smp_group[node_id] |
-			(u64)(&LOONGSON_INT_ROUTER_INTENCLR);
-		u64 introuter_lpc_addr = smp_group[node_id] |
-			(u64)(&LOONGSON_INT_ROUTER_LPC);
-
-		*(volatile u32 *)intenclr_addr = 1 << 10;
-		*(volatile u8 *)introuter_lpc_addr = 0x10 + (1<<core_id);
-	}
-}
-
-static inline void unmask_loongson_irq(struct irq_data *d)
-{
-	/* Workaround: UART IRQ may deliver to any core */
-	if (d->irq == LOONGSON_UART_IRQ) {
-		int cpu = smp_processor_id();
-		int node_id = cpu_logical_map(cpu) / loongson_sysconf.cores_per_node;
-		int core_id = cpu_logical_map(cpu) % loongson_sysconf.cores_per_node;
-		u64 intenset_addr = smp_group[node_id] |
-			(u64)(&LOONGSON_INT_ROUTER_INTENSET);
-		u64 introuter_lpc_addr = smp_group[node_id] |
-			(u64)(&LOONGSON_INT_ROUTER_LPC);
-
-		*(volatile u32 *)intenset_addr = 1 << 10;
-		*(volatile u8 *)introuter_lpc_addr = 0x10 + (1<<core_id);
-	}
-
-	set_c0_status(0x100 << (d->irq - MIPS_CPU_IRQ_BASE));
-	irq_enable_hazard();
-}
+static inline void mask_loongson_irq(struct irq_data *d) { }
+static inline void unmask_loongson_irq(struct irq_data *d) { }
 
  /* For MIPS IRQs which shared by all cores */
 static struct irq_chip loongson_irq_chip = {
@@ -183,12 +140,11 @@ void __init mach_init_irq(void)
 	chip->irq_set_affinity = plat_set_irq_affinity;
 
 	irq_set_chip_and_handler(LOONGSON_UART_IRQ,
-			&loongson_irq_chip, handle_level_irq);
-
-	/* setup HT1 irq */
-	setup_irq(LOONGSON_HT1_IRQ, &cascade_irqaction);
+			&loongson_irq_chip, handle_percpu_irq);
+	irq_set_chip_and_handler(LOONGSON_BRIDGE_IRQ,
+			&loongson_irq_chip, handle_percpu_irq);
 
-	set_c0_status(STATUSF_IP2 | STATUSF_IP6);
+	set_c0_status(STATUSF_IP2 | STATUSF_IP3 | STATUSF_IP6);
 }
 
 #ifdef CONFIG_HOTPLUG_CPU

arch/mips/loongson64/loongson-3/numa.c

@@ -180,43 +180,39 @@ static void __init szmem(unsigned int node)
 
 static void __init node_mem_init(unsigned int node)
 {
-	unsigned long bootmap_size;
 	unsigned long node_addrspace_offset;
-	unsigned long start_pfn, end_pfn, freepfn;
+	unsigned long start_pfn, end_pfn;
 
 	node_addrspace_offset = nid_to_addroffset(node);
 	pr_info("Node%d's addrspace_offset is 0x%lx\n",
 			node, node_addrspace_offset);
 
 	get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
-	freepfn = start_pfn;
-	if (node == 0)
-		freepfn = PFN_UP(__pa_symbol(&_end)); /* kernel end address */
-	pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx, freepfn=0x%lx\n",
-		node, start_pfn, end_pfn, freepfn);
+	pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx\n",
+		node, start_pfn, end_pfn);
 
 	__node_data[node] = prealloc__node_data + node;
 
-	NODE_DATA(node)->bdata = &bootmem_node_data[node];
 	NODE_DATA(node)->node_start_pfn = start_pfn;
 	NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
 
-	bootmap_size = init_bootmem_node(NODE_DATA(node), freepfn,
-					start_pfn, end_pfn);
 	free_bootmem_with_active_regions(node, end_pfn);
-	if (node == 0) /* used by finalize_initrd() */
+
+	if (node == 0) {
+		/* kernel end address */
+		unsigned long kernel_end_pfn = PFN_UP(__pa_symbol(&_end));
+
+		/* used by finalize_initrd() */
 		max_low_pfn = end_pfn;
 
-	/* This is reserved for the kernel and bdata->node_bootmem_map */
-	reserve_bootmem_node(NODE_DATA(node), start_pfn << PAGE_SHIFT,
-		((freepfn - start_pfn) << PAGE_SHIFT) + bootmap_size,
-		BOOTMEM_DEFAULT);
+		/* Reserve the kernel text/data/bss */
+		memblock_reserve(start_pfn << PAGE_SHIFT,
+				 ((kernel_end_pfn - start_pfn) << PAGE_SHIFT));
 
-	if (node == 0 && node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT)) {
 		/* Reserve 0xfe000000~0xffffffff for RS780E integrated GPU */
-		reserve_bootmem_node(NODE_DATA(node),
-				(node_addrspace_offset | 0xfe000000),
-				32 << 20, BOOTMEM_DEFAULT);
+		if (node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT))
+			memblock_reserve((node_addrspace_offset | 0xfe000000),
+					 32 << 20);
 	}
 
 	sparse_memory_present_with_active_regions(node);

arch/mips/loongson64/loongson-3/smp.c

@@ -21,6 +21,7 @@
 #include <linux/sched/task_stack.h>
 #include <linux/smp.h>
 #include <linux/cpufreq.h>
+#include <linux/kexec.h>
 #include <asm/processor.h>
 #include <asm/time.h>
 #include <asm/clock.h>
@@ -349,7 +350,7 @@ static void loongson3_smp_finish(void)
 	write_c0_compare(read_c0_count() + mips_hpt_frequency/HZ);
 	local_irq_enable();
 	loongson3_ipi_write64(0,
-			(void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x0));
+			ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x0);
 	pr_info("CPU#%d finished, CP0_ST=%x\n",
 			smp_processor_id(), read_c0_status());
 }
@@ -416,13 +417,13 @@ static int loongson3_boot_secondary(int cpu, struct task_struct *idle)
 			cpu, startargs[0], startargs[1], startargs[2]);
 
 	loongson3_ipi_write64(startargs[3],
-			(void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x18));
+			ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x18);
 	loongson3_ipi_write64(startargs[2],
-			(void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x10));
+			ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x10);
 	loongson3_ipi_write64(startargs[1],
-			(void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x8));
+			ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x8);
 	loongson3_ipi_write64(startargs[0],
-			(void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x0));
+			ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x0);
 	return 0;
 }
 
@@ -749,4 +750,7 @@ const struct plat_smp_ops loongson3_smp_ops = {
 	.cpu_disable = loongson3_cpu_disable,
 	.cpu_die = loongson3_cpu_die,
 #endif
+#ifdef CONFIG_KEXEC
+	.kexec_nonboot_cpu = kexec_nonboot_cpu_jump,
+#endif
 };

arch/mips/mm/init.c

@@ -32,7 +32,6 @@
 #include <linux/kcore.h>
 #include <linux/initrd.h>
 
-#include <asm/asm-offsets.h>
 #include <asm/bootinfo.h>
 #include <asm/cachectl.h>
 #include <asm/cpu.h>
@@ -521,17 +520,13 @@ unsigned long pgd_current[NR_CPUS];
 #endif
 
 /*
- * gcc 3.3 and older have trouble determining that PTRS_PER_PGD and PGD_ORDER
- * are constants.  So we use the variants from asm-offset.h until that gcc
- * will officially be retired.
- *
  * Align swapper_pg_dir in to 64K, allows its address to be loaded
  * with a single LUI instruction in the TLB handlers.  If we used
  * __aligned(64K), its size would get rounded up to the alignment
  * size, and waste space.  So we place it in its own section and align
  * it in the linker script.
  */
-pgd_t swapper_pg_dir[_PTRS_PER_PGD] __section(.bss..swapper_pg_dir);
+pgd_t swapper_pg_dir[PTRS_PER_PGD] __section(.bss..swapper_pg_dir);
 #ifndef __PAGETABLE_PUD_FOLDED
 pud_t invalid_pud_table[PTRS_PER_PUD] __page_aligned_bss;
 #endif

arch/mips/netlogic/common/irq.c

@@ -291,7 +291,7 @@ static int __init xlp_of_pic_init(struct device_node *node,
 	/* we need a hack to get the PIC's SoC chip id */
 	ret = of_address_to_resource(node, 0, &res);
 	if (ret < 0) {
-		pr_err("PIC %s: reg property not found!\n", node->name);
+		pr_err("PIC %pOFn: reg property not found!\n", node);
 		return -EINVAL;
 	}
 
@@ -304,21 +304,21 @@ static int __init xlp_of_pic_init(struct device_node *node,
 				break;
 		}
 		if (socid == NLM_NR_NODES) {
-			pr_err("PIC %s: Node mapping for bus %d not found!\n",
-					node->name, bus);
+			pr_err("PIC %pOFn: Node mapping for bus %d not found!\n",
+					node, bus);
 			return -EINVAL;
 		}
 	} else {
 		socid = (res.start >> 18) & 0x3;
 		if (!nlm_node_present(socid)) {
-			pr_err("PIC %s: node %d does not exist!\n",
-							node->name, socid);
+			pr_err("PIC %pOFn: node %d does not exist!\n",
+							node, socid);
 			return -EINVAL;
 		}
 	}
 
 	if (!nlm_node_present(socid)) {
-		pr_err("PIC %s: node %d does not exist!\n", node->name, socid);
+		pr_err("PIC %pOFn: node %d does not exist!\n", node, socid);
 		return -EINVAL;
 	}
 
@@ -326,7 +326,7 @@ static int __init xlp_of_pic_init(struct device_node *node,
 		nlm_irq_to_xirq(socid, PIC_IRQ_BASE), PIC_IRQ_BASE,
 		&xlp_pic_irq_domain_ops, NULL);
 	if (xlp_pic_domain == NULL) {
-		pr_err("PIC %s: Creating legacy domain failed!\n", node->name);
+		pr_err("PIC %pOFn: Creating legacy domain failed!\n", node);
 		return -EINVAL;
 	}
 	pr_info("Node %d: IRQ domain created for PIC@%pR\n", socid, &res);

arch/mips/pci/ops-loongson3.c

@@ -18,22 +18,36 @@ static int loongson3_pci_config_access(unsigned char access_type,
 		int where, u32 *data)
 {
 	unsigned char busnum = bus->number;
-	u_int64_t addr, type;
-	void *addrp;
-	int device = PCI_SLOT(devfn);
 	int function = PCI_FUNC(devfn);
+	int device = PCI_SLOT(devfn);
 	int reg = where & ~3;
+	void *addrp;
+	u64 addr;
+
+	if (where < PCI_CFG_SPACE_SIZE) { /* standard config */
+		addr = (busnum << 16) | (device << 11) | (function << 8) | reg;
+		if (busnum == 0) {
+			if (device > 31)
+				return PCIBIOS_DEVICE_NOT_FOUND;
+			addrp = (void *)TO_UNCAC(HT1LO_PCICFG_BASE | addr);
+		} else {
+			addrp = (void *)TO_UNCAC(HT1LO_PCICFG_BASE_TP1 | addr);
+		}
+	} else if (where < PCI_CFG_SPACE_EXP_SIZE) {  /* extended config */
+		struct pci_dev *rootdev;
+
+		rootdev = pci_get_domain_bus_and_slot(0, 0, 0);
+		if (!rootdev)
+			return PCIBIOS_DEVICE_NOT_FOUND;
 
-	addr = (busnum << 16) | (device << 11) | (function << 8) | reg;
-	if (busnum == 0) {
-		if (device > 31)
+		addr = pci_resource_start(rootdev, 3);
+		if (!addr)
 			return PCIBIOS_DEVICE_NOT_FOUND;
-		addrp = (void *)(TO_UNCAC(HT1LO_PCICFG_BASE) | (addr & 0xffff));
-		type = 0;
 
+		addr |= busnum << 20 | device << 15 | function << 12 | reg;
+		addrp = (void *)TO_UNCAC(addr);
 	} else {
-		addrp = (void *)(TO_UNCAC(HT1LO_PCICFG_BASE_TP1) | (addr));
-		type = 0x10000;
+		return PCIBIOS_DEVICE_NOT_FOUND;
 	}
 
 	if (access_type == PCI_ACCESS_WRITE)

arch/mips/pci/pci-legacy.c

@@ -127,8 +127,12 @@ static void pcibios_scanbus(struct pci_controller *hose)
 	if (pci_has_flag(PCI_PROBE_ONLY)) {
 		pci_bus_claim_resources(bus);
 	} else {
+		struct pci_bus *child;
+
 		pci_bus_size_bridges(bus);
 		pci_bus_assign_resources(bus);
+		list_for_each_entry(child, &bus->children, node)
+			pcie_bus_configure_settings(child);
 	}
 	pci_bus_add_devices(bus);
 }

arch/mips/pci/pci-rt2880.c

@@ -246,6 +246,8 @@ static int rt288x_pci_probe(struct platform_device *pdev)
 	rt2880_pci_write_u32(PCI_BASE_ADDRESS_0, 0x08000000);
 	(void) rt2880_pci_read_u32(PCI_BASE_ADDRESS_0);
 
+	rt2880_pci_controller.of_node = pdev->dev.of_node;
+
 	register_pci_controller(&rt2880_pci_controller);
 	return 0;
 }

arch/mips/pmcs-msp71xx/msp_usb.c

@@ -133,13 +133,13 @@ static int __init msp_usb_setup(void)
 	 * "D" for device-mode.	 If it works for Ethernet, why not USB...
 	 *  -- hammtrev, 2007/03/22
 	 */
-	snprintf((char *)&envstr[0], sizeof(envstr), "usbmode");
+	snprintf(&envstr[0], sizeof(envstr), "usbmode");
 
 	/* set default host mode */
 	val = 1;
 
 	/* get environment string */
-	strp = prom_getenv((char *)&envstr[0]);
+	strp = prom_getenv(&envstr[0]);
 	if (strp) {
 		/* compare string */
 		if (!strcmp(strp, "device"))

arch/mips/ralink/cevt-rt3352.c

@@ -134,7 +134,7 @@ static int __init ralink_systick_init(struct device_node *np)
 	systick.dev.min_delta_ticks = 0x3;
 	systick.dev.irq = irq_of_parse_and_map(np, 0);
 	if (!systick.dev.irq) {
-		pr_err("%s: request_irq failed", np->name);
+		pr_err("%pOFn: request_irq failed", np);
 		return -EINVAL;
 	}
 
@@ -146,8 +146,8 @@ static int __init ralink_systick_init(struct device_node *np)
 
 	clockevents_register_device(&systick.dev);
 
-	pr_info("%s: running - mult: %d, shift: %d\n",
-			np->name, systick.dev.mult, systick.dev.shift);
+	pr_info("%pOFn: running - mult: %d, shift: %d\n",
+			np, systick.dev.mult, systick.dev.shift);
 
 	return 0;
 }

arch/mips/ralink/ill_acc.c

@@ -62,7 +62,7 @@ static int __init ill_acc_of_setup(void)
 
 	pdev = of_find_device_by_node(np);
 	if (!pdev) {
-		pr_err("%s: failed to lookup pdev\n", np->name);
+		pr_err("%pOFn: failed to lookup pdev\n", np);
 		return -EINVAL;
 	}
 

arch/mips/ralink/rt305x.c

@@ -49,6 +49,10 @@ static struct rt2880_pmx_func rgmii_func[] = { FUNC("rgmii", 0, 40, 12) };
 static struct rt2880_pmx_func rt3352_lna_func[] = { FUNC("lna", 0, 36, 2) };
 static struct rt2880_pmx_func rt3352_pa_func[] = { FUNC("pa", 0, 38, 2) };
 static struct rt2880_pmx_func rt3352_led_func[] = { FUNC("led", 0, 40, 5) };
+static struct rt2880_pmx_func rt3352_cs1_func[] = {
+	FUNC("spi_cs1", 0, 45, 1),
+	FUNC("wdg_cs1", 1, 45, 1),
+};
 
 static struct rt2880_pmx_group rt3050_pinmux_data[] = {
 	GRP("i2c", i2c_func, 1, RT305X_GPIO_MODE_I2C),
@@ -75,6 +79,7 @@ static struct rt2880_pmx_group rt3352_pinmux_data[] = {
 	GRP("lna", rt3352_lna_func, 1, RT3352_GPIO_MODE_LNA),
 	GRP("pa", rt3352_pa_func, 1, RT3352_GPIO_MODE_PA),
 	GRP("led", rt3352_led_func, 1, RT5350_GPIO_MODE_PHY_LED),
+	GRP("spi_cs1", rt3352_cs1_func, 2, RT5350_GPIO_MODE_SPI_CS1),
 	{ 0 }
 };
 

arch/mips/sgi-ip22/ip28-berr.c

@@ -464,7 +464,7 @@ void ip22_be_interrupt(int irq)
 		die_if_kernel("Oops", regs);
 		force_sig(SIGBUS, current);
 	} else if (debug_be_interrupt)
-		show_regs((struct pt_regs *)regs);
+		show_regs(regs);
 }
 
 static int ip28_be_handler(struct pt_regs *regs, int is_fixup)

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

@@ -389,7 +389,6 @@ static void __init node_mem_init(cnodeid_t node)
 {
 	unsigned long slot_firstpfn = slot_getbasepfn(node, 0);
 	unsigned long slot_freepfn = node_getfirstfree(node);
-	unsigned long bootmap_size;
 	unsigned long start_pfn, end_pfn;
 
 	get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
@@ -400,7 +399,6 @@ static void __init node_mem_init(cnodeid_t node)
 	__node_data[node] = __va(slot_freepfn << PAGE_SHIFT);
 	memset(__node_data[node], 0, PAGE_SIZE);
 
-	NODE_DATA(node)->bdata = &bootmem_node_data[node];
 	NODE_DATA(node)->node_start_pfn = start_pfn;
 	NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
 
@@ -409,12 +407,11 @@ static void __init node_mem_init(cnodeid_t node)
 	slot_freepfn += PFN_UP(sizeof(struct pglist_data) +
 			       sizeof(struct hub_data));
 
-	bootmap_size = init_bootmem_node(NODE_DATA(node), slot_freepfn,
-					start_pfn, end_pfn);
 	free_bootmem_with_active_regions(node, end_pfn);
-	reserve_bootmem_node(NODE_DATA(node), slot_firstpfn << PAGE_SHIFT,
-		((slot_freepfn - slot_firstpfn) << PAGE_SHIFT) + bootmap_size,
-		BOOTMEM_DEFAULT);
+
+	memblock_reserve(slot_firstpfn << PAGE_SHIFT,
+			 ((slot_freepfn - slot_firstpfn) << PAGE_SHIFT));
+
 	sparse_memory_present_with_active_regions(node);
 }
 

arch/mips/tools/.gitignore

@@ -0,0 +1 @@
+elf-entry

arch/mips/tools/Makefile

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+hostprogs-y := elf-entry
+PHONY += elf-entry
+elf-entry: $(obj)/elf-entry
+	@:

arch/mips/tools/elf-entry.c

@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <byteswap.h>
+#include <elf.h>
+#include <endian.h>
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef be32toh
+/* If libc provides [bl]e{32,64}toh() then we'll use them */
+#elif BYTE_ORDER == LITTLE_ENDIAN
+# define be32toh(x)	bswap_32(x)
+# define le32toh(x)	(x)
+# define be64toh(x)	bswap_64(x)
+# define le64toh(x)	(x)
+#elif BYTE_ORDER == BIG_ENDIAN
+# define be32toh(x)	(x)
+# define le32toh(x)	bswap_32(x)
+# define be64toh(x)	(x)
+# define le64toh(x)	bswap_64(x)
+#endif
+
+__attribute__((noreturn))
+static void die(const char *msg)
+{
+	fputs(msg, stderr);
+	exit(EXIT_FAILURE);
+}
+
+int main(int argc, const char *argv[])
+{
+	uint64_t entry;
+	size_t nread;
+	FILE *file;
+	union {
+		Elf32_Ehdr ehdr32;
+		Elf64_Ehdr ehdr64;
+	} hdr;
+
+	if (argc != 2)
+		die("Usage: elf-entry <elf-file>\n");
+
+	file = fopen(argv[1], "r");
+	if (!file) {
+		perror("Unable to open input file");
+		return EXIT_FAILURE;
+	}
+
+	nread = fread(&hdr, 1, sizeof(hdr), file);
+	if (nread != sizeof(hdr)) {
+		perror("Unable to read input file");
+		return EXIT_FAILURE;
+	}
+
+	if (memcmp(hdr.ehdr32.e_ident, ELFMAG, SELFMAG))
+		die("Input is not an ELF\n");
+
+	switch (hdr.ehdr32.e_ident[EI_CLASS]) {
+	case ELFCLASS32:
+		switch (hdr.ehdr32.e_ident[EI_DATA]) {
+		case ELFDATA2LSB:
+			entry = le32toh(hdr.ehdr32.e_entry);
+			break;
+		case ELFDATA2MSB:
+			entry = be32toh(hdr.ehdr32.e_entry);
+			break;
+		default:
+			die("Invalid ELF encoding\n");
+		}
+
+		/* Sign extend to form a canonical address */
+		entry = (int64_t)(int32_t)entry;
+		break;
+
+	case ELFCLASS64:
+		switch (hdr.ehdr32.e_ident[EI_DATA]) {
+		case ELFDATA2LSB:
+			entry = le64toh(hdr.ehdr64.e_entry);
+			break;
+		case ELFDATA2MSB:
+			entry = be64toh(hdr.ehdr64.e_entry);
+			break;
+		default:
+			die("Invalid ELF encoding\n");
+		}
+		break;
+
+	default:
+		die("Invalid ELF class\n");
+	}
+
+	printf("0x%016" PRIx64 "\n", entry);
+	return EXIT_SUCCESS;
+}

arch/mips/txx9/generic/setup.c

@@ -960,12 +960,11 @@ void __init txx9_sramc_init(struct resource *r)
 		goto exit_put;
 	err = sysfs_create_bin_file(&dev->dev.kobj, &dev->bindata_attr);
 	if (err) {
-		device_unregister(&dev->dev);
 		iounmap(dev->base);
-		kfree(dev);
+		device_unregister(&dev->dev);
 	}
 	return;
 exit_put:
+	iounmap(dev->base);
 	put_device(&dev->dev);
-	return;
 }