diff options
Diffstat (limited to 'arch/metag')
68 files changed, 887 insertions, 530 deletions
diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig index afc8973d148..499b7610eaa 100644 --- a/arch/metag/Kconfig +++ b/arch/metag/Kconfig @@ -1,7 +1,3 @@ -config SYMBOL_PREFIX - string - default "_" - config METAG def_bool y select EMBEDDED @@ -13,11 +9,11 @@ config METAG select HAVE_ARCH_TRACEHOOK select HAVE_C_RECORDMCOUNT select HAVE_DEBUG_KMEMLEAK + select HAVE_DEBUG_STACKOVERFLOW select HAVE_DYNAMIC_FTRACE select HAVE_FTRACE_MCOUNT_RECORD select HAVE_FUNCTION_TRACER select HAVE_FUNCTION_TRACE_MCOUNT_TEST - select HAVE_GENERIC_HARDIRQS select HAVE_KERNEL_BZIP2 select HAVE_KERNEL_GZIP select HAVE_KERNEL_LZO @@ -25,8 +21,10 @@ config METAG select HAVE_MEMBLOCK select HAVE_MEMBLOCK_NODE_MAP select HAVE_MOD_ARCH_SPECIFIC + select HAVE_OPROFILE select HAVE_PERF_EVENTS select HAVE_SYSCALL_TRACEPOINTS + select HAVE_UNDERSCORE_SYMBOL_PREFIX select IRQ_DOMAIN select MODULES_USE_ELF_RELA select OF @@ -54,10 +52,7 @@ config GENERIC_HWEIGHT config GENERIC_CALIBRATE_DELAY def_bool y -config GENERIC_GPIO - def_bool n - -config NO_IOPORT +config NO_IOPORT_MAP def_bool y source "init/Kconfig" @@ -116,7 +111,6 @@ config METAG_META21 config SMP bool "Symmetric multi-processing support" depends on METAG_META21 && METAG_META21_MMU - select USE_GENERIC_SMP_HELPERS help This enables support for systems with more than one thread running Linux. If you have a system with only one thread running Linux, @@ -209,6 +203,9 @@ config METAG_PERFCOUNTER_IRQS When disabled, Performance Counters information will be collected based on Timer Interrupt. +config HW_PERF_EVENTS + def_bool METAG_PERFCOUNTER_IRQS && PERF_EVENTS + config METAG_DA bool "DA support" help diff --git a/arch/metag/Kconfig.debug b/arch/metag/Kconfig.debug index e45bbf6a7a5..cb5c9286054 100644 --- a/arch/metag/Kconfig.debug +++ b/arch/metag/Kconfig.debug @@ -6,13 +6,6 @@ config TRACE_IRQFLAGS_SUPPORT source "lib/Kconfig.debug" -config DEBUG_STACKOVERFLOW - bool "Check for stack overflows" - depends on DEBUG_KERNEL - help - This option will cause messages to be printed if free stack space - drops below a certain limit. - config 4KSTACKS bool "Use 4Kb for kernel stacks instead of 8Kb" depends on DEBUG_KERNEL diff --git a/arch/metag/Kconfig.soc b/arch/metag/Kconfig.soc index ec079cfb7c6..973640f4675 100644 --- a/arch/metag/Kconfig.soc +++ b/arch/metag/Kconfig.soc @@ -14,6 +14,20 @@ config META21_FPGA help This is a Meta 2.1 FPGA bitstream, just a bare CPU. +config SOC_TZ1090 + bool "Toumaz Xenif TZ1090 SoC (Comet)" + select ARCH_WANT_OPTIONAL_GPIOLIB + select IMGPDC_IRQ + select METAG_LNKGET_AROUND_CACHE + select METAG_META21 + select METAG_SMP_WRITE_REORDERING + select PINCTRL + select PINCTRL_TZ1090 + select PINCTRL_TZ1090_PDC + help + This is a Toumaz Technology Xenif TZ1090 (A.K.A. Comet) SoC containing + a 2-threaded HTP. + endchoice menu "SoC configuration" diff --git a/arch/metag/Makefile b/arch/metag/Makefile index 81bd6a1c748..9739857bded 100644 --- a/arch/metag/Makefile +++ b/arch/metag/Makefile @@ -20,7 +20,7 @@ checkflags-$(CONFIG_METAG_META12) += -DMETAC_1_2 checkflags-$(CONFIG_METAG_META21) += -DMETAC_2_1 CHECKFLAGS += -D__metag__ $(checkflags-y) -KBUILD_DEFCONFIG := meta2_defconfig +KBUILD_DEFCONFIG := tz1090_defconfig sflags-$(CONFIG_METAG_META12) += -mmetac=1.2 ifeq ($(CONFIG_METAG_META12),y) @@ -49,6 +49,8 @@ core-y += arch/metag/mm/ libs-y += arch/metag/lib/ libs-y += arch/metag/tbx/ +drivers-$(CONFIG_OPROFILE) += arch/metag/oprofile/ + boot := arch/metag/boot boot_targets += uImage diff --git a/arch/metag/boot/.gitignore b/arch/metag/boot/.gitignore index a021da20115..2d6c0c16088 100644 --- a/arch/metag/boot/.gitignore +++ b/arch/metag/boot/.gitignore @@ -1,4 +1,4 @@ vmlinux* uImage* ramdisk.* -*.dtb +*.dtb* diff --git a/arch/metag/boot/dts/Makefile b/arch/metag/boot/dts/Makefile index e0b5afd8bde..72c12187942 100644 --- a/arch/metag/boot/dts/Makefile +++ b/arch/metag/boot/dts/Makefile @@ -1,16 +1,22 @@ dtb-y += skeleton.dtb +dtb-y += tz1090_generic.dtb # Built-in dtb builtindtb-y := skeleton +builtindtb-$(CONFIG_SOC_TZ1090) := tz1090_generic ifneq ($(CONFIG_METAG_BUILTIN_DTB_NAME),"") - builtindtb-y := $(CONFIG_METAG_BUILTIN_DTB_NAME) + builtindtb-y := $(patsubst "%",%,$(CONFIG_METAG_BUILTIN_DTB_NAME)) endif -obj-$(CONFIG_METAG_BUILTIN_DTB) += $(patsubst "%",%,$(builtindtb-y)).dtb.o + +dtb-$(CONFIG_METAG_BUILTIN_DTB) += $(builtindtb-y).dtb +obj-$(CONFIG_METAG_BUILTIN_DTB) += $(builtindtb-y).dtb.o targets += dtbs targets += $(dtb-y) +.SECONDARY: $(obj)/$(builtindtb-y).dtb.S + dtbs: $(addprefix $(obj)/, $(dtb-y)) -clean-files += *.dtb +clean-files += *.dtb *.dtb.S diff --git a/arch/metag/boot/dts/include/dt-bindings b/arch/metag/boot/dts/include/dt-bindings new file mode 120000 index 00000000000..08c00e4972f --- /dev/null +++ b/arch/metag/boot/dts/include/dt-bindings @@ -0,0 +1 @@ +../../../../../include/dt-bindings
\ No newline at end of file diff --git a/arch/metag/boot/dts/skeleton.dts b/arch/metag/boot/dts/skeleton.dts index 7244d1f0d55..7a49aeb365d 100644 --- a/arch/metag/boot/dts/skeleton.dts +++ b/arch/metag/boot/dts/skeleton.dts @@ -7,4 +7,4 @@ */ /dts-v1/; -/include/ "skeleton.dtsi" +#include "skeleton.dtsi" diff --git a/arch/metag/boot/dts/tz1090.dtsi b/arch/metag/boot/dts/tz1090.dtsi new file mode 100644 index 00000000000..24ea7d2e913 --- /dev/null +++ b/arch/metag/boot/dts/tz1090.dtsi @@ -0,0 +1,108 @@ +/* + * Copyright (C) 2012 Imagination Technologies Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "skeleton.dtsi" + +#include <dt-bindings/interrupt-controller/irq.h> + +/ { + compatible = "toumaz,tz1090", "img,meta"; + + interrupt-parent = <&intc>; + + intc: interrupt-controller { + compatible = "img,meta-intc"; + interrupt-controller; + #interrupt-cells = <2>; + num-banks = <2>; + }; + + soc { + compatible = "simple-bus"; + #address-cells = <1>; + #size-cells = <1>; + ranges; + + pdc: pdc@0x02006000 { + interrupt-controller; + #interrupt-cells = <2>; + + reg = <0x02006000 0x1000>; + compatible = "img,pdc-intc"; + + num-perips = <3>; + num-syswakes = <3>; + + interrupts = <18 IRQ_TYPE_LEVEL_HIGH>, /* Syswakes */ + <30 IRQ_TYPE_LEVEL_HIGH>, /* Perip 0 (RTC) */ + <29 IRQ_TYPE_LEVEL_HIGH>, /* Perip 1 (IR) */ + <31 IRQ_TYPE_LEVEL_HIGH>; /* Perip 2 (WDT) */ + }; + + pinctrl: pinctrl@02005800 { + #gpio-range-cells = <3>; + compatible = "img,tz1090-pinctrl"; + reg = <0x02005800 0xe4>; + }; + + pdc_pinctrl: pinctrl@02006500 { + #gpio-range-cells = <3>; + compatible = "img,tz1090-pdc-pinctrl"; + reg = <0x02006500 0x100>; + }; + + gpios: gpios@02005800 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "img,tz1090-gpio"; + reg = <0x02005800 0x90>; + + gpios0: bank@0 { + gpio-controller; + interrupt-controller; + #gpio-cells = <2>; + #interrupt-cells = <2>; + reg = <0>; + interrupts = <13 IRQ_TYPE_LEVEL_HIGH>; + gpio-ranges = <&pinctrl 0 0 30>; + }; + gpios1: bank@1 { + gpio-controller; + interrupt-controller; + #gpio-cells = <2>; + #interrupt-cells = <2>; + reg = <1>; + interrupts = <14 IRQ_TYPE_LEVEL_HIGH>; + gpio-ranges = <&pinctrl 0 30 30>; + }; + gpios2: bank@2 { + gpio-controller; + interrupt-controller; + #gpio-cells = <2>; + #interrupt-cells = <2>; + reg = <2>; + interrupts = <15 IRQ_TYPE_LEVEL_HIGH>; + gpio-ranges = <&pinctrl 0 60 30>; + }; + }; + + pdc_gpios: gpios@02006500 { + gpio-controller; + #gpio-cells = <2>; + + compatible = "img,tz1090-pdc-gpio"; + reg = <0x02006500 0x100>; + + interrupt-parent = <&pdc>; + interrupts = <8 IRQ_TYPE_NONE>, + <9 IRQ_TYPE_NONE>, + <10 IRQ_TYPE_NONE>; + gpio-ranges = <&pdc_pinctrl 0 0 7>; + }; + }; +}; diff --git a/arch/metag/boot/dts/tz1090_generic.dts b/arch/metag/boot/dts/tz1090_generic.dts new file mode 100644 index 00000000000..f9609095596 --- /dev/null +++ b/arch/metag/boot/dts/tz1090_generic.dts @@ -0,0 +1,10 @@ +/* + * Copyright (C) 2012 Imagination Technologies Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +/dts-v1/; + +#include "tz1090.dtsi" diff --git a/arch/metag/configs/meta1_defconfig b/arch/metag/configs/meta1_defconfig index c35a75e8ecf..01cd67e4403 100644 --- a/arch/metag/configs/meta1_defconfig +++ b/arch/metag/configs/meta1_defconfig @@ -1,6 +1,5 @@ # CONFIG_LOCALVERSION_AUTO is not set # CONFIG_SWAP is not set -CONFIG_LOG_BUF_SHIFT=13 CONFIG_SYSFS_DEPRECATED=y CONFIG_SYSFS_DEPRECATED_V2=y CONFIG_KALLSYMS_ALL=y diff --git a/arch/metag/configs/meta2_defconfig b/arch/metag/configs/meta2_defconfig index fb314841018..643392ba7ed 100644 --- a/arch/metag/configs/meta2_defconfig +++ b/arch/metag/configs/meta2_defconfig @@ -1,7 +1,6 @@ # CONFIG_LOCALVERSION_AUTO is not set # CONFIG_SWAP is not set CONFIG_SYSVIPC=y -CONFIG_LOG_BUF_SHIFT=13 CONFIG_SYSFS_DEPRECATED=y CONFIG_SYSFS_DEPRECATED_V2=y CONFIG_KALLSYMS_ALL=y diff --git a/arch/metag/configs/meta2_smp_defconfig b/arch/metag/configs/meta2_smp_defconfig index 6c7b777ac27..f3306737da2 100644 --- a/arch/metag/configs/meta2_smp_defconfig +++ b/arch/metag/configs/meta2_smp_defconfig @@ -1,7 +1,6 @@ # CONFIG_LOCALVERSION_AUTO is not set # CONFIG_SWAP is not set CONFIG_SYSVIPC=y -CONFIG_LOG_BUF_SHIFT=13 CONFIG_SYSFS_DEPRECATED=y CONFIG_SYSFS_DEPRECATED_V2=y CONFIG_KALLSYMS_ALL=y diff --git a/arch/metag/configs/tz1090_defconfig b/arch/metag/configs/tz1090_defconfig new file mode 100644 index 00000000000..9f9316a6df2 --- /dev/null +++ b/arch/metag/configs/tz1090_defconfig @@ -0,0 +1,42 @@ +# CONFIG_LOCALVERSION_AUTO is not set +# CONFIG_SWAP is not set +CONFIG_SYSVIPC=y +CONFIG_SYSFS_DEPRECATED=y +CONFIG_SYSFS_DEPRECATED_V2=y +CONFIG_KALLSYMS_ALL=y +# CONFIG_ELF_CORE is not set +CONFIG_SLAB=y +# CONFIG_BLK_DEV_BSG is not set +CONFIG_PARTITION_ADVANCED=y +# CONFIG_MSDOS_PARTITION is not set +# CONFIG_IOSCHED_DEADLINE is not set +# CONFIG_IOSCHED_CFQ is not set +CONFIG_FLATMEM_MANUAL=y +CONFIG_SOC_TZ1090=y +CONFIG_METAG_HALT_ON_PANIC=y +# CONFIG_METAG_FPU is not set +CONFIG_METAG_DA=y +CONFIG_HZ_100=y +CONFIG_DEVTMPFS=y +# CONFIG_STANDALONE is not set +# CONFIG_PREVENT_FIRMWARE_BUILD is not set +# CONFIG_FW_LOADER is not set +CONFIG_BLK_DEV_RAM=y +CONFIG_BLK_DEV_RAM_COUNT=1 +CONFIG_BLK_DEV_RAM_SIZE=16384 +# CONFIG_INPUT is not set +# CONFIG_SERIO is not set +# CONFIG_VT is not set +# CONFIG_LEGACY_PTYS is not set +CONFIG_DA_TTY=y +CONFIG_DA_CONSOLE=y +# CONFIG_DEVKMEM is not set +# CONFIG_HW_RANDOM is not set +CONFIG_GPIOLIB=y +# CONFIG_HWMON is not set +# CONFIG_USB_SUPPORT is not set +# CONFIG_DNOTIFY is not set +CONFIG_TMPFS=y +# CONFIG_MISC_FILESYSTEMS is not set +# CONFIG_SCHED_DEBUG is not set +CONFIG_DEBUG_INFO=y diff --git a/arch/metag/include/asm/Kbuild b/arch/metag/include/asm/Kbuild index 6ae0ccb632c..c29ead89a31 100644 --- a/arch/metag/include/asm/Kbuild +++ b/arch/metag/include/asm/Kbuild @@ -13,6 +13,7 @@ generic-y += fb.h generic-y += fcntl.h generic-y += futex.h generic-y += hardirq.h +generic-y += hash.h generic-y += hw_irq.h generic-y += ioctl.h generic-y += ioctls.h @@ -23,6 +24,7 @@ generic-y += kmap_types.h generic-y += kvm_para.h generic-y += local.h generic-y += local64.h +generic-y += mcs_spinlock.h generic-y += msgbuf.h generic-y += mutex.h generic-y += param.h @@ -30,6 +32,7 @@ generic-y += pci.h generic-y += percpu.h generic-y += poll.h generic-y += posix_types.h +generic-y += preempt.h generic-y += scatterlist.h generic-y += sections.h generic-y += sembuf.h diff --git a/arch/metag/include/asm/atomic.h b/arch/metag/include/asm/atomic.h index 307ecd2bd9a..470e365f04e 100644 --- a/arch/metag/include/asm/atomic.h +++ b/arch/metag/include/asm/atomic.h @@ -4,6 +4,7 @@ #include <linux/compiler.h> #include <linux/types.h> #include <asm/cmpxchg.h> +#include <asm/barrier.h> #if defined(CONFIG_METAG_ATOMICITY_IRQSOFF) /* The simple UP case. */ @@ -39,11 +40,6 @@ #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) -#define smp_mb__before_atomic_dec() barrier() -#define smp_mb__after_atomic_dec() barrier() -#define smp_mb__before_atomic_inc() barrier() -#define smp_mb__after_atomic_inc() barrier() - #endif #define atomic_dec_if_positive(v) atomic_sub_if_positive(1, v) diff --git a/arch/metag/include/asm/barrier.h b/arch/metag/include/asm/barrier.h index c90bfc6bf64..c7591e80067 100644 --- a/arch/metag/include/asm/barrier.h +++ b/arch/metag/include/asm/barrier.h @@ -15,6 +15,7 @@ static inline void wr_fence(void) volatile int *flushptr = (volatile int *) LINSYSEVENT_WR_FENCE; barrier(); *flushptr = 0; + barrier(); } #else /* CONFIG_METAG_META21 */ @@ -35,6 +36,7 @@ static inline void wr_fence(void) *flushptr = 0; *flushptr = 0; *flushptr = 0; + barrier(); } #endif /* !CONFIG_METAG_META21 */ @@ -68,6 +70,7 @@ static inline void fence(void) volatile int *flushptr = (volatile int *) LINSYSEVENT_WR_ATOMIC_UNLOCK; barrier(); *flushptr = 0; + barrier(); } #define smp_mb() fence() #define smp_rmb() fence() @@ -82,4 +85,22 @@ static inline void fence(void) #define smp_read_barrier_depends() do { } while (0) #define set_mb(var, value) do { var = value; smp_mb(); } while (0) +#define smp_store_release(p, v) \ +do { \ + compiletime_assert_atomic_type(*p); \ + smp_mb(); \ + ACCESS_ONCE(*p) = (v); \ +} while (0) + +#define smp_load_acquire(p) \ +({ \ + typeof(*p) ___p1 = ACCESS_ONCE(*p); \ + compiletime_assert_atomic_type(*p); \ + smp_mb(); \ + ___p1; \ +}) + +#define smp_mb__before_atomic() barrier() +#define smp_mb__after_atomic() barrier() + #endif /* _ASM_METAG_BARRIER_H */ diff --git a/arch/metag/include/asm/bitops.h b/arch/metag/include/asm/bitops.h index c0d0df0d137..2671134ee74 100644 --- a/arch/metag/include/asm/bitops.h +++ b/arch/metag/include/asm/bitops.h @@ -5,12 +5,6 @@ #include <asm/barrier.h> #include <asm/global_lock.h> -/* - * clear_bit() doesn't provide any barrier for the compiler. - */ -#define smp_mb__before_clear_bit() barrier() -#define smp_mb__after_clear_bit() barrier() - #ifdef CONFIG_SMP /* * These functions are the basis of our bit ops. diff --git a/arch/metag/include/asm/bug.h b/arch/metag/include/asm/bug.h index d04b48cefec..9f8967f10f8 100644 --- a/arch/metag/include/asm/bug.h +++ b/arch/metag/include/asm/bug.h @@ -6,7 +6,7 @@ struct pt_regs; extern const char *trap_name(int trapno); -extern void die(const char *str, struct pt_regs *regs, long err, - unsigned long addr) __attribute__ ((noreturn)); +extern void __noreturn die(const char *str, struct pt_regs *regs, long err, + unsigned long addr); #endif diff --git a/arch/metag/include/asm/checksum.h b/arch/metag/include/asm/checksum.h index 999bf761a73..08dd1cc6579 100644 --- a/arch/metag/include/asm/checksum.h +++ b/arch/metag/include/asm/checksum.h @@ -64,7 +64,8 @@ static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __wsum sum) { unsigned long len_proto = (proto + len) << 8; - asm ("ADD %0, %0, %1\n" + asm ("ADDS %0, %0, %1\n" + "ADDCS %0, %0, #1\n" "ADDS %0, %0, %2\n" "ADDCS %0, %0, #1\n" "ADDS %0, %0, %3\n" diff --git a/arch/metag/include/asm/clock.h b/arch/metag/include/asm/clock.h index 3e2915a280c..ded4ab2e1fd 100644 --- a/arch/metag/include/asm/clock.h +++ b/arch/metag/include/asm/clock.h @@ -19,6 +19,8 @@ * core frequency will be determined like this: * Meta 1: based on loops_per_jiffy. * Meta 2: (EXPAND_TIMER_DIV + 1) MHz. + * If a "core" clock is provided by the device tree, it + * will override this function. */ struct meta_clock_desc { unsigned long (*get_core_freq)(void); @@ -27,6 +29,12 @@ struct meta_clock_desc { extern struct meta_clock_desc _meta_clock; /* + * Perform platform clock initialisation, reading clocks from device tree etc. + * Only accessible during boot. + */ +void init_metag_clocks(void); + +/* * Set up the default clock, ensuring all callbacks are valid - only accessible * during boot. */ diff --git a/arch/metag/include/asm/fixmap.h b/arch/metag/include/asm/fixmap.h index 33312751c92..af621b04173 100644 --- a/arch/metag/include/asm/fixmap.h +++ b/arch/metag/include/asm/fixmap.h @@ -51,37 +51,7 @@ enum fixed_addresses { #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) #define FIXADDR_START ((FIXADDR_TOP - FIXADDR_SIZE) & PMD_MASK) -#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) -#define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT) - -extern void __this_fixmap_does_not_exist(void); -/* - * 'index to address' translation. If anyone tries to use the idx - * directly without tranlation, we catch the bug with a NULL-deference - * kernel oops. Illegal ranges of incoming indices are caught too. - */ -static inline unsigned long fix_to_virt(const unsigned int idx) -{ - /* - * this branch gets completely eliminated after inlining, - * except when someone tries to use fixaddr indices in an - * illegal way. (such as mixing up address types or using - * out-of-range indices). - * - * If it doesn't get removed, the linker will complain - * loudly with a reasonably clear error message.. - */ - if (idx >= __end_of_fixed_addresses) - __this_fixmap_does_not_exist(); - - return __fix_to_virt(idx); -} - -static inline unsigned long virt_to_fix(const unsigned long vaddr) -{ - BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START); - return __virt_to_fix(vaddr); -} +#include <asm-generic/fixmap.h> #define kmap_get_fixmap_pte(vaddr) \ pte_offset_kernel( \ diff --git a/arch/metag/include/asm/hugetlb.h b/arch/metag/include/asm/hugetlb.h index f545477e61f..471f481e67f 100644 --- a/arch/metag/include/asm/hugetlb.h +++ b/arch/metag/include/asm/hugetlb.h @@ -2,6 +2,7 @@ #define _ASM_METAG_HUGETLB_H #include <asm/page.h> +#include <asm-generic/hugetlb.h> static inline int is_hugepage_only_range(struct mm_struct *mm, diff --git a/arch/metag/include/asm/irq.h b/arch/metag/include/asm/irq.h index be0c8f3c5a5..ad6bd0edbc3 100644 --- a/arch/metag/include/asm/irq.h +++ b/arch/metag/include/asm/irq.h @@ -17,6 +17,7 @@ struct pt_regs; int tbisig_map(unsigned int hw); extern void do_IRQ(int irq, struct pt_regs *regs); +extern void init_IRQ(void); #ifdef CONFIG_METAG_SUSPEND_MEM int traps_save_context(void); diff --git a/arch/metag/include/asm/mach/arch.h b/arch/metag/include/asm/mach/arch.h index 12c5664fea6..433f94624fa 100644 --- a/arch/metag/include/asm/mach/arch.h +++ b/arch/metag/include/asm/mach/arch.h @@ -53,7 +53,7 @@ struct machine_desc { /* * Current machine - only accessible during boot. */ -extern struct machine_desc *machine_desc; +extern const struct machine_desc *machine_desc; /* * Machine type table - also only accessible during boot diff --git a/arch/metag/include/asm/metag_mem.h b/arch/metag/include/asm/metag_mem.h index 3f7b54d8cca..aa5a076df43 100644 --- a/arch/metag/include/asm/metag_mem.h +++ b/arch/metag/include/asm/metag_mem.h @@ -700,6 +700,9 @@ #define SYSC_xCPARTG_AND_S 8 #define SYSC_xCPARTL_OR_BITS 0x000F0000 /* Ors into top 4 bits */ #define SYSC_xCPARTL_OR_S 16 +#ifdef METAC_2_1 +#define SYSC_DCPART_GCON_BIT 0x00100000 /* Coherent shared local */ +#endif /* METAC_2_1 */ #define SYSC_xCPARTG_OR_BITS 0x0F000000 /* Ors into top 4 bits */ #define SYSC_xCPARTG_OR_S 24 #define SYSC_CWRMODE_BIT 0x80000000 /* Write cache mode bit */ diff --git a/arch/metag/include/asm/pgalloc.h b/arch/metag/include/asm/pgalloc.h index 275d9285141..3104df0a482 100644 --- a/arch/metag/include/asm/pgalloc.h +++ b/arch/metag/include/asm/pgalloc.h @@ -52,8 +52,12 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm, { struct page *pte; pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO, 0); - if (pte) - pgtable_page_ctor(pte); + if (!pte) + return NULL; + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; + } return pte; } diff --git a/arch/metag/include/asm/pgtable.h b/arch/metag/include/asm/pgtable.h index 1cd13d59519..0d9dc548729 100644 --- a/arch/metag/include/asm/pgtable.h +++ b/arch/metag/include/asm/pgtable.h @@ -333,9 +333,6 @@ static inline void update_mmu_cache(struct vm_area_struct *vma, #define kern_addr_valid(addr) (1) -#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ - remap_pfn_range(vma, vaddr, pfn, size, prot) - /* * No page table caches to initialise */ diff --git a/arch/metag/include/asm/processor.h b/arch/metag/include/asm/processor.h index 9b029a7911c..a8a37477c66 100644 --- a/arch/metag/include/asm/processor.h +++ b/arch/metag/include/asm/processor.h @@ -22,6 +22,8 @@ /* Add an extra page of padding at the top of the stack for the guard page. */ #define STACK_TOP (TASK_SIZE - PAGE_SIZE) #define STACK_TOP_MAX STACK_TOP +/* Maximum virtual space for stack */ +#define STACK_SIZE_MAX (CONFIG_MAX_STACK_SIZE_MB*1024*1024) /* This decides where the kernel will search for a free chunk of vm * space during mmap's. @@ -199,4 +201,6 @@ extern void (*soc_halt)(void); extern void show_trace(struct task_struct *tsk, unsigned long *sp, struct pt_regs *regs); +extern const struct seq_operations cpuinfo_op; + #endif diff --git a/arch/metag/include/asm/prom.h b/arch/metag/include/asm/prom.h deleted file mode 100644 index d2aa35d2228..00000000000 --- a/arch/metag/include/asm/prom.h +++ /dev/null @@ -1,23 +0,0 @@ -/* - * arch/metag/include/asm/prom.h - * - * Copyright (C) 2012 Imagination Technologies Ltd. - * - * Based on ARM version: - * Copyright (C) 2009 Canonical Ltd. <jeremy.kerr@canonical.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - */ -#ifndef __ASM_METAG_PROM_H -#define __ASM_METAG_PROM_H - -#include <asm/setup.h> -#define HAVE_ARCH_DEVTREE_FIXUPS - -extern struct machine_desc *setup_machine_fdt(void *dt); -extern void copy_fdt(void); - -#endif /* __ASM_METAG_PROM_H */ diff --git a/arch/metag/include/asm/setup.h b/arch/metag/include/asm/setup.h index e13083b15dd..e9fdee9452b 100644 --- a/arch/metag/include/asm/setup.h +++ b/arch/metag/include/asm/setup.h @@ -3,6 +3,7 @@ #include <uapi/asm/setup.h> +extern const struct machine_desc *setup_machine_fdt(void *dt); void per_cpu_trap_init(unsigned long); extern void __init dump_machine_table(void); #endif /* _ASM_METAG_SETUP_H */ diff --git a/arch/metag/include/asm/smp.h b/arch/metag/include/asm/smp.h index e0373f81a11..1d7e770f7a5 100644 --- a/arch/metag/include/asm/smp.h +++ b/arch/metag/include/asm/smp.h @@ -7,13 +7,11 @@ enum ipi_msg_type { IPI_CALL_FUNC, - IPI_CALL_FUNC_SINGLE, IPI_RESCHEDULE, }; extern void arch_send_call_function_single_ipi(int cpu); extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); -#define arch_send_call_function_ipi_mask arch_send_call_function_ipi_mask asmlinkage void secondary_start_kernel(void); diff --git a/arch/metag/include/asm/tbx.h b/arch/metag/include/asm/tbx.h index 287b36ff8ad..703b9cb0ac5 100644 --- a/arch/metag/include/asm/tbx.h +++ b/arch/metag/include/asm/tbx.h @@ -150,11 +150,9 @@ #else /* Reserved 0x04-0x09 */ #endif -#define TBID_SIGNUM_SWS 0x0A /* KICK received with SigMask != 0 */ -#define TBID_SIGNUM_SWK 0x0B /* KICK received with SigMask == 0 */ -/* Reserved 0x0C-0x0F */ +/* Reserved 0x0A-0x0F */ #define TBID_SIGNUM_TRT 0x10 /* Timer trigger */ -#define TBID_SIGNUM_LWK 0x11 /* Low level kick (handler provided by TBI) */ +#define TBID_SIGNUM_LWK 0x11 /* Low level kick */ #define TBID_SIGNUM_XXF 0x12 /* Fault handler - receives ALL _xxF sigs */ #ifdef TBI_1_4 #define TBID_SIGNUM_DFR 0x13 /* Deferred Exception handler */ @@ -183,8 +181,7 @@ each hardware signal, sometimes this is a many-to-one relationship. */ #define TBI_TRIG_BIT(SigNum) (\ ((SigNum) >= TBID_SIGNUM_TRT) ? 1<<((SigNum)-TBID_SIGNUM_TRT) :\ - ( ((SigNum) == TBID_SIGNUM_SWS) || \ - ((SigNum) == TBID_SIGNUM_SWK) ) ? \ + ((SigNum) == TBID_SIGNUM_LWK) ? \ TXSTAT_KICK_BIT : TXSTATI_BGNDHALT_BIT ) /* Return the hardware trigger vector number for entries in the @@ -687,10 +684,8 @@ typedef union _tbires_tag_ { Triggers will indicate the status of TXSTAT or TXSTATI sampled by the code that called the handler. - InstOrSWSId is defined firstly as 'Inst' if the SigNum is TBID_SIGNUM_SWx - and hold the actual SWITCH instruction detected, secondly if SigNum - is TBID_SIGNUM_SWS the 'SWSId' is defined to hold the Id of the - software signal detected, in other cases the value of this + Inst is defined as 'Inst' if the SigNum is TBID_SIGNUM_SWx and holds the + actual SWITCH instruction detected, in other cases the value of this parameter is undefined. pTBI points at the PTBI structure related to the thread and processing @@ -709,7 +704,7 @@ typedef union _tbires_tag_ { */ typedef TBIRES (*PTBIAPIFN)( TBIRES State, int SigNum, - int Triggers, int InstOrSWSId, + int Triggers, int Inst, volatile struct _tbi_tag_ *pTBI ); #endif /* ifndef __ASSEMBLY__ */ @@ -757,7 +752,7 @@ typedef volatile struct _tbi_tag_ { #ifndef __ASSEMBLY__ /* This handler should be used for TBID_SIGNUM_DFR */ extern TBIRES __TBIHandleDFR ( TBIRES State, int SigNum, - int Triggers, int InstOrSWSId, + int Triggers, int Inst, volatile struct _tbi_tag_ *pTBI ); #endif #endif diff --git a/arch/metag/include/asm/thread_info.h b/arch/metag/include/asm/thread_info.h index 0ecd34d8b5f..47711336119 100644 --- a/arch/metag/include/asm/thread_info.h +++ b/arch/metag/include/asm/thread_info.h @@ -46,8 +46,6 @@ struct thread_info { #endif -#define PREEMPT_ACTIVE 0x10000000 - #ifdef CONFIG_4KSTACKS #define THREAD_SHIFT 12 #else @@ -119,10 +117,8 @@ static inline int kstack_end(void *addr) #define TIF_SECCOMP 5 /* secure computing */ #define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */ #define TIF_NOTIFY_RESUME 7 /* callback before returning to user */ -#define TIF_POLLING_NRFLAG 8 /* true if poll_idle() is polling - TIF_NEED_RESCHED */ -#define TIF_MEMDIE 9 /* is terminating due to OOM killer */ -#define TIF_SYSCALL_TRACEPOINT 10 /* syscall tracepoint instrumentation */ +#define TIF_MEMDIE 8 /* is terminating due to OOM killer */ +#define TIF_SYSCALL_TRACEPOINT 9 /* syscall tracepoint instrumentation */ #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) @@ -150,6 +146,4 @@ static inline int kstack_end(void *addr) #define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \ _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP)) -#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG) - #endif /* _ASM_THREAD_INFO_H */ diff --git a/arch/metag/include/asm/topology.h b/arch/metag/include/asm/topology.h index 23f5118f58d..e95f874ded1 100644 --- a/arch/metag/include/asm/topology.h +++ b/arch/metag/include/asm/topology.h @@ -3,31 +3,6 @@ #ifdef CONFIG_NUMA -/* sched_domains SD_NODE_INIT for Meta machines */ -#define SD_NODE_INIT (struct sched_domain) { \ - .parent = NULL, \ - .child = NULL, \ - .groups = NULL, \ - .min_interval = 8, \ - .max_interval = 32, \ - .busy_factor = 32, \ - .imbalance_pct = 125, \ - .cache_nice_tries = 2, \ - .busy_idx = 3, \ - .idle_idx = 2, \ - .newidle_idx = 0, \ - .wake_idx = 0, \ - .forkexec_idx = 0, \ - .flags = SD_LOAD_BALANCE \ - | SD_BALANCE_FORK \ - | SD_BALANCE_EXEC \ - | SD_BALANCE_NEWIDLE \ - | SD_SERIALIZE, \ - .last_balance = jiffies, \ - .balance_interval = 1, \ - .nr_balance_failed = 0, \ -} - #define cpu_to_node(cpu) ((void)(cpu), 0) #define parent_node(node) ((void)(node), 0) diff --git a/arch/metag/include/uapi/asm/Kbuild b/arch/metag/include/uapi/asm/Kbuild index 876c71f866d..ab78be2b6eb 100644 --- a/arch/metag/include/uapi/asm/Kbuild +++ b/arch/metag/include/uapi/asm/Kbuild @@ -2,12 +2,13 @@ include include/uapi/asm-generic/Kbuild.asm header-y += byteorder.h +header-y += ech.h header-y += ptrace.h -header-y += resource.h header-y += sigcontext.h header-y += siginfo.h header-y += swab.h header-y += unistd.h generic-y += mman.h +generic-y += resource.h generic-y += setup.h diff --git a/arch/metag/include/uapi/asm/ech.h b/arch/metag/include/uapi/asm/ech.h new file mode 100644 index 00000000000..ac94d1cf9be --- /dev/null +++ b/arch/metag/include/uapi/asm/ech.h @@ -0,0 +1,15 @@ +#ifndef _UAPI_METAG_ECH_H +#define _UAPI_METAG_ECH_H + +/* + * These bits can be set in the top half of the D0.8 register when DSP context + * switching is enabled, in order to support partial DSP context save/restore. + */ + +#define TBICTX_XEXT_BIT 0x1000 /* Enable extended context save */ +#define TBICTX_XTDP_BIT 0x0800 /* DSP accumulators/RAM/templates */ +#define TBICTX_XHL2_BIT 0x0400 /* Hardware loops */ +#define TBICTX_XAXX_BIT 0x0200 /* Extended AX registers (A*.4-7) */ +#define TBICTX_XDX8_BIT 0x0100 /* Extended DX registers (D*.8-15) */ + +#endif /* _UAPI_METAG_ECH_H */ diff --git a/arch/metag/include/uapi/asm/resource.h b/arch/metag/include/uapi/asm/resource.h deleted file mode 100644 index 526d23cc305..00000000000 --- a/arch/metag/include/uapi/asm/resource.h +++ /dev/null @@ -1,7 +0,0 @@ -#ifndef _UAPI_METAG_RESOURCE_H -#define _UAPI_METAG_RESOURCE_H - -#define _STK_LIM_MAX (1 << 28) -#include <asm-generic/resource.h> - -#endif /* _UAPI_METAG_RESOURCE_H */ diff --git a/arch/metag/kernel/cachepart.c b/arch/metag/kernel/cachepart.c index 3a589dfb966..0a2385fa2a1 100644 --- a/arch/metag/kernel/cachepart.c +++ b/arch/metag/kernel/cachepart.c @@ -24,15 +24,21 @@ unsigned int get_dcache_size(void) { unsigned int config2 = metag_in32(METAC_CORE_CONFIG2); - return 0x1000 << ((config2 & METAC_CORECFG2_DCSZ_BITS) - >> METAC_CORECFG2_DCSZ_S); + unsigned int sz = 0x1000 << ((config2 & METAC_CORECFG2_DCSZ_BITS) + >> METAC_CORECFG2_DCSZ_S); + if (config2 & METAC_CORECFG2_DCSMALL_BIT) + sz >>= 6; + return sz; } unsigned int get_icache_size(void) { unsigned int config2 = metag_in32(METAC_CORE_CONFIG2); - return 0x1000 << ((config2 & METAC_CORE_C2ICSZ_BITS) - >> METAC_CORE_C2ICSZ_S); + unsigned int sz = 0x1000 << ((config2 & METAC_CORE_C2ICSZ_BITS) + >> METAC_CORE_C2ICSZ_S); + if (config2 & METAC_CORECFG2_ICSMALL_BIT) + sz >>= 6; + return sz; } unsigned int get_global_dcache_size(void) @@ -61,7 +67,7 @@ static unsigned int get_thread_cache_size(unsigned int cache, int thread_id) return 0; #if PAGE_OFFSET >= LINGLOBAL_BASE /* Checking for global cache */ - cache_size = (cache == DCACHE ? get_global_dache_size() : + cache_size = (cache == DCACHE ? get_global_dcache_size() : get_global_icache_size()); offset = 8; #else @@ -94,22 +100,23 @@ void check_for_cache_aliasing(int thread_id) thread_cache_size = get_thread_cache_size(cache_type, thread_id); if (thread_cache_size < 0) - pr_emerg("Can't read %s cache size", \ + pr_emerg("Can't read %s cache size\n", cache_type ? "DCACHE" : "ICACHE"); else if (thread_cache_size == 0) /* Cache is off. No need to check for aliasing */ continue; if (thread_cache_size / CACHE_ASSOCIATIVITY > PAGE_SIZE) { - pr_emerg("Cache aliasing detected in %s on Thread %d", + pr_emerg("Potential cache aliasing detected in %s on Thread %d\n", cache_type ? "DCACHE" : "ICACHE", thread_id); - pr_warn("Total %s size: %u bytes", - cache_type ? "DCACHE" : "ICACHE ", + pr_warn("Total %s size: %u bytes\n", + cache_type ? "DCACHE" : "ICACHE", cache_type ? get_dcache_size() : get_icache_size()); - pr_warn("Thread %s size: %d bytes", + pr_warn("Thread %s size: %d bytes\n", cache_type ? "CACHE" : "ICACHE", thread_cache_size); - pr_warn("Page Size: %lu bytes", PAGE_SIZE); + pr_warn("Page Size: %lu bytes\n", PAGE_SIZE); + panic("Potential cache aliasing detected"); } } } diff --git a/arch/metag/kernel/clock.c b/arch/metag/kernel/clock.c index defc84056f1..6339c9c6d0a 100644 --- a/arch/metag/kernel/clock.c +++ b/arch/metag/kernel/clock.c @@ -8,8 +8,10 @@ * published by the Free Software Foundation. */ +#include <linux/clk.h> #include <linux/delay.h> #include <linux/io.h> +#include <linux/of.h> #include <asm/param.h> #include <asm/clock.h> @@ -34,8 +36,63 @@ static unsigned long get_core_freq_default(void) #endif } +static struct clk *clk_core; + +/* Clk based get_core_freq callback. */ +static unsigned long get_core_freq_clk(void) +{ + return clk_get_rate(clk_core); +} + +/** + * init_metag_core_clock() - Set up core clock from devicetree. + * + * Checks to see if a "core" clock is provided in the device tree, and overrides + * the get_core_freq callback to use it. + */ +static void __init init_metag_core_clock(void) +{ + /* + * See if a core clock is provided by the devicetree (and + * registered by the init callback above). + */ + struct device_node *node; + node = of_find_compatible_node(NULL, NULL, "img,meta"); + if (!node) { + pr_warn("%s: no compatible img,meta DT node found\n", + __func__); + return; + } + + clk_core = of_clk_get_by_name(node, "core"); + if (IS_ERR(clk_core)) { + pr_warn("%s: no core clock found in DT\n", + __func__); + return; + } + + /* + * Override the core frequency callback to use + * this clk. + */ + _meta_clock.get_core_freq = get_core_freq_clk; +} + +/** + * init_metag_clocks() - Set up clocks from devicetree. + * + * Set up important clocks from device tree. In particular any needed for clock + * sources. + */ +void __init init_metag_clocks(void) +{ + init_metag_core_clock(); + + pr_info("Core clock frequency: %lu Hz\n", get_coreclock()); +} + /** - * setup_meta_clocks() - Set up the Meta clock. + * setup_meta_clocks() - Early set up of the Meta clock. * @desc: Clock descriptor usually provided by machine description * * Ensures all callbacks are valid. diff --git a/arch/metag/kernel/da.c b/arch/metag/kernel/da.c index 52aabb658fd..a35dbed6fff 100644 --- a/arch/metag/kernel/da.c +++ b/arch/metag/kernel/da.c @@ -5,12 +5,14 @@ */ +#include <linux/export.h> #include <linux/io.h> #include <linux/kernel.h> #include <asm/da.h> #include <asm/metag_mem.h> bool _metag_da_present; +EXPORT_SYMBOL_GPL(_metag_da_present); int __init metag_da_probe(void) { diff --git a/arch/metag/kernel/devtree.c b/arch/metag/kernel/devtree.c index 7cd02529636..18dd7aea9fd 100644 --- a/arch/metag/kernel/devtree.c +++ b/arch/metag/kernel/devtree.c @@ -34,6 +34,19 @@ void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) return alloc_bootmem_align(size, align); } +static const void * __init arch_get_next_mach(const char *const **match) +{ + static const struct machine_desc *mdesc = __arch_info_begin; + const struct machine_desc *m = mdesc; + + if (m >= __arch_info_end) + return NULL; + + mdesc++; + *match = m->dt_compat; + return m; +} + /** * setup_machine_fdt - Machine setup when an dtb was passed to the kernel * @dt: virtual address pointer to dt blob @@ -41,74 +54,18 @@ void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) * If a dtb was passed to the kernel, then use it to choose the correct * machine_desc and to setup the system. */ -struct machine_desc * __init setup_machine_fdt(void *dt) +const struct machine_desc * __init setup_machine_fdt(void *dt) { - struct boot_param_header *devtree = dt; - struct machine_desc *mdesc, *mdesc_best = NULL; - unsigned int score, mdesc_score = ~1; - unsigned long dt_root; - const char *model; + const struct machine_desc *mdesc; /* check device tree validity */ - if (be32_to_cpu(devtree->magic) != OF_DT_HEADER) + if (!early_init_dt_scan(dt)) return NULL; - /* Search the mdescs for the 'best' compatible value match */ - initial_boot_params = devtree; - dt_root = of_get_flat_dt_root(); - - for_each_machine_desc(mdesc) { - score = of_flat_dt_match(dt_root, mdesc->dt_compat); - if (score > 0 && score < mdesc_score) { - mdesc_best = mdesc; - mdesc_score = score; - } - } - if (!mdesc_best) { - const char *prop; - long size; - - pr_err("\nError: unrecognized/unsupported device tree compatible list:\n[ "); - - prop = of_get_flat_dt_prop(dt_root, "compatible", &size); - if (prop) { - while (size > 0) { - printk("'%s' ", prop); - size -= strlen(prop) + 1; - prop += strlen(prop) + 1; - } - } - printk("]\n\n"); - + mdesc = of_flat_dt_match_machine(NULL, arch_get_next_mach); + if (!mdesc) dump_machine_table(); /* does not return */ - } - - model = of_get_flat_dt_prop(dt_root, "model", NULL); - if (!model) - model = of_get_flat_dt_prop(dt_root, "compatible", NULL); - if (!model) - model = "<unknown>"; - pr_info("Machine: %s, model: %s\n", mdesc_best->name, model); - - /* Retrieve various information from the /chosen node */ - of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line); - - return mdesc_best; -} + pr_info("Machine name: %s\n", mdesc->name); -/** - * copy_fdt - Copy device tree into non-init memory. - * - * We must copy the flattened device tree blob into non-init memory because the - * unflattened device tree will reference the strings in it directly. - */ -void __init copy_fdt(void) -{ - void *alloc = early_init_dt_alloc_memory_arch( - be32_to_cpu(initial_boot_params->totalsize), 0x40); - if (alloc) { - memcpy(alloc, initial_boot_params, - be32_to_cpu(initial_boot_params->totalsize)); - initial_boot_params = alloc; - } + return mdesc; } diff --git a/arch/metag/kernel/dma.c b/arch/metag/kernel/dma.c index 8c00dedadc5..c700d625067 100644 --- a/arch/metag/kernel/dma.c +++ b/arch/metag/kernel/dma.c @@ -305,9 +305,7 @@ void dma_free_coherent(struct device *dev, size_t size, if (pfn_valid(pfn)) { struct page *page = pfn_to_page(pfn); - ClearPageReserved(page); - - __free_page(page); + __free_reserved_page(page); continue; } } @@ -401,11 +399,6 @@ static int __init dma_alloc_init(void) pgd = pgd_offset(&init_mm, CONSISTENT_START); pud = pud_alloc(&init_mm, pgd, CONSISTENT_START); pmd = pmd_alloc(&init_mm, pud, CONSISTENT_START); - if (!pmd) { - pr_err("%s: no pmd tables\n", __func__); - ret = -ENOMEM; - break; - } WARN_ON(!pmd_none(*pmd)); pte = pte_alloc_kernel(pmd, CONSISTENT_START); diff --git a/arch/metag/kernel/ftrace.c b/arch/metag/kernel/ftrace.c index a774f321643..ed1d685157c 100644 --- a/arch/metag/kernel/ftrace.c +++ b/arch/metag/kernel/ftrace.c @@ -117,10 +117,7 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr) } /* run from kstop_machine */ -int __init ftrace_dyn_arch_init(void *data) +int __init ftrace_dyn_arch_init(void) { - /* The return code is returned via data */ - writel(0, data); - return 0; } diff --git a/arch/metag/kernel/head.S b/arch/metag/kernel/head.S index 969dffabc03..713f71d1bdf 100644 --- a/arch/metag/kernel/head.S +++ b/arch/metag/kernel/head.S @@ -1,6 +1,7 @@ ! Copyright 2005,2006,2007,2009 Imagination Technologies #include <linux/init.h> +#include <asm/metag_mem.h> #include <generated/asm-offsets.h> #undef __exit @@ -48,6 +49,13 @@ __exit: .global _secondary_startup .type _secondary_startup,function _secondary_startup: +#if CONFIG_PAGE_OFFSET < LINGLOBAL_BASE + ! In case GCOn has just been turned on we need to fence any writes that + ! the boot thread might have performed prior to coherency taking effect. + MOVT D0Re0,#HI(LINSYSEVENT_WR_ATOMIC_UNLOCK) + MOV D1Re0,#0 + SETD [D0Re0], D1Re0 +#endif MOVT A0StP,#HI(_secondary_data_stack) ADD A0StP,A0StP,#LO(_secondary_data_stack) GETD A0StP,[A0StP] diff --git a/arch/metag/kernel/irq.c b/arch/metag/kernel/irq.c index 87707efeb0a..5385dd1216b 100644 --- a/arch/metag/kernel/irq.c +++ b/arch/metag/kernel/irq.c @@ -25,7 +25,7 @@ static union irq_ctx *hardirq_ctx[NR_CPUS] __read_mostly; static union irq_ctx *softirq_ctx[NR_CPUS] __read_mostly; #endif -struct irq_domain *root_domain; +static struct irq_domain *root_domain; static unsigned int startup_meta_irq(struct irq_data *data) { @@ -159,44 +159,30 @@ void irq_ctx_exit(int cpu) extern asmlinkage void __do_softirq(void); -asmlinkage void do_softirq(void) +void do_softirq_own_stack(void) { - unsigned long flags; struct thread_info *curctx; union irq_ctx *irqctx; u32 *isp; - if (in_interrupt()) - return; - - local_irq_save(flags); - - if (local_softirq_pending()) { - curctx = current_thread_info(); - irqctx = softirq_ctx[smp_processor_id()]; - irqctx->tinfo.task = curctx->task; - - /* build the stack frame on the softirq stack */ - isp = (u32 *) ((char *)irqctx + sizeof(struct thread_info)); - - asm volatile ( - "MOV D0.5,%0\n" - "SWAP A0StP,D0.5\n" - "CALLR D1RtP,___do_softirq\n" - "MOV A0StP,D0.5\n" - : - : "r" (isp) - : "memory", "cc", "D1Ar1", "D0Ar2", "D1Ar3", "D0Ar4", - "D1Ar5", "D0Ar6", "D0Re0", "D1Re0", "D0.4", "D1RtP", - "D0.5" - ); - /* - * Shouldn't happen, we returned above if in_interrupt(): - */ - WARN_ON_ONCE(softirq_count()); - } - - local_irq_restore(flags); + curctx = current_thread_info(); + irqctx = softirq_ctx[smp_processor_id()]; + irqctx->tinfo.task = curctx->task; + + /* build the stack frame on the softirq stack */ + isp = (u32 *) ((char *)irqctx + sizeof(struct thread_info)); + + asm volatile ( + "MOV D0.5,%0\n" + "SWAP A0StP,D0.5\n" + "CALLR D1RtP,___do_softirq\n" + "MOV A0StP,D0.5\n" + : + : "r" (isp) + : "memory", "cc", "D1Ar1", "D0Ar2", "D1Ar3", "D0Ar4", + "D1Ar5", "D0Ar6", "D0Re0", "D1Re0", "D0.4", "D1RtP", + "D0.5" + ); } #endif @@ -275,17 +261,6 @@ int __init arch_probe_nr_irqs(void) } #ifdef CONFIG_HOTPLUG_CPU -static void route_irq(struct irq_data *data, unsigned int irq, unsigned int cpu) -{ - struct irq_desc *desc = irq_to_desc(irq); - struct irq_chip *chip = irq_data_get_irq_chip(data); - - raw_spin_lock_irq(&desc->lock); - if (chip->irq_set_affinity) - chip->irq_set_affinity(data, cpumask_of(cpu), false); - raw_spin_unlock_irq(&desc->lock); -} - /* * The CPU has been marked offline. Migrate IRQs off this CPU. If * the affinity settings do not allow other CPUs, force them onto any @@ -294,10 +269,9 @@ static void route_irq(struct irq_data *data, unsigned int irq, unsigned int cpu) void migrate_irqs(void) { unsigned int i, cpu = smp_processor_id(); - struct irq_desc *desc; - for_each_irq_desc(i, desc) { - struct irq_data *data = irq_desc_get_irq_data(desc); + for_each_active_irq(i) { + struct irq_data *data = irq_get_irq_data(i); unsigned int newcpu; if (irqd_is_per_cpu(data)) @@ -313,11 +287,8 @@ void migrate_irqs(void) i, cpu); cpumask_setall(data->affinity); - newcpu = cpumask_any_and(data->affinity, - cpu_online_mask); } - - route_irq(data, i, newcpu); + irq_set_affinity(i, data->affinity); } } #endif /* CONFIG_HOTPLUG_CPU */ diff --git a/arch/metag/kernel/kick.c b/arch/metag/kernel/kick.c index 50fcbec98cd..beb37762132 100644 --- a/arch/metag/kernel/kick.c +++ b/arch/metag/kernel/kick.c @@ -26,6 +26,8 @@ * pass it as an argument. */ #include <linux/export.h> +#include <linux/hardirq.h> +#include <linux/irq.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/types.h> @@ -66,6 +68,7 @@ EXPORT_SYMBOL(kick_unregister_func); TBIRES kick_handler(TBIRES State, int SigNum, int Triggers, int Inst, PTBI pTBI) { + struct pt_regs *old_regs; struct kick_irq_handler *kh; struct list_head *lh; int handled = 0; @@ -79,6 +82,9 @@ kick_handler(TBIRES State, int SigNum, int Triggers, int Inst, PTBI pTBI) trace_hardirqs_off(); + old_regs = set_irq_regs((struct pt_regs *)State.Sig.pCtx); + irq_enter(); + /* * There is no need to disable interrupts here because we * can't nest KICK interrupts in a KICK interrupt handler. @@ -97,5 +103,8 @@ kick_handler(TBIRES State, int SigNum, int Triggers, int Inst, PTBI pTBI) WARN_ON(!handled); + irq_exit(); + set_irq_regs(old_regs); + return tail_end(ret); } diff --git a/arch/metag/kernel/metag_ksyms.c b/arch/metag/kernel/metag_ksyms.c index ec872ef14eb..215c94ad63a 100644 --- a/arch/metag/kernel/metag_ksyms.c +++ b/arch/metag/kernel/metag_ksyms.c @@ -1,5 +1,7 @@ #include <linux/export.h> +#include <linux/types.h> +#include <asm/checksum.h> #include <asm/div64.h> #include <asm/ftrace.h> #include <asm/page.h> @@ -15,6 +17,9 @@ EXPORT_SYMBOL(max_pfn); EXPORT_SYMBOL(min_low_pfn); #endif +/* Network checksum functions */ +EXPORT_SYMBOL(csum_partial); + /* TBI symbols */ EXPORT_SYMBOL(__TBI); EXPORT_SYMBOL(__TBIFindSeg); diff --git a/arch/metag/kernel/perf/perf_event.c b/arch/metag/kernel/perf/perf_event.c index a876d5ff389..5cc4d4dcf3c 100644 --- a/arch/metag/kernel/perf/perf_event.c +++ b/arch/metag/kernel/perf/perf_event.c @@ -22,9 +22,9 @@ #include <linux/slab.h> #include <asm/core_reg.h> -#include <asm/hwthread.h> #include <asm/io.h> #include <asm/irq.h> +#include <asm/processor.h> #include "perf_event.h" @@ -40,10 +40,10 @@ static DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events); /* PMU admin */ const char *perf_pmu_name(void) { - if (metag_pmu) - return metag_pmu->pmu.name; + if (!metag_pmu) + return NULL; - return NULL; + return metag_pmu->name; } EXPORT_SYMBOL_GPL(perf_pmu_name); @@ -171,6 +171,7 @@ static int metag_pmu_event_init(struct perf_event *event) switch (event->attr.type) { case PERF_TYPE_HARDWARE: case PERF_TYPE_HW_CACHE: + case PERF_TYPE_RAW: err = _hw_perf_event_init(event); break; @@ -211,9 +212,10 @@ again: /* * Calculate the delta and add it to the counter. */ - delta = new_raw_count - prev_raw_count; + delta = (new_raw_count - prev_raw_count) & MAX_PERIOD; local64_add(delta, &event->count); + local64_sub(delta, &hwc->period_left); } int metag_pmu_event_set_period(struct perf_event *event, @@ -223,6 +225,10 @@ int metag_pmu_event_set_period(struct perf_event *event, s64 period = hwc->sample_period; int ret = 0; + /* The period may have been changed */ + if (unlikely(period != hwc->last_period)) + left += period - hwc->last_period; + if (unlikely(left <= -period)) { left = period; local64_set(&hwc->period_left, left); @@ -240,8 +246,10 @@ int metag_pmu_event_set_period(struct perf_event *event, if (left > (s64)metag_pmu->max_period) left = metag_pmu->max_period; - if (metag_pmu->write) - metag_pmu->write(idx, (u64)(-left) & MAX_PERIOD); + if (metag_pmu->write) { + local64_set(&hwc->prev_count, -(s32)left); + metag_pmu->write(idx, -left & MAX_PERIOD); + } perf_event_update_userpage(event); @@ -549,6 +557,10 @@ static int _hw_perf_event_init(struct perf_event *event) if (err) return err; break; + + case PERF_TYPE_RAW: + mapping = attr->config; + break; } /* Return early if the event is unsupported */ @@ -610,15 +622,13 @@ static void metag_pmu_enable_counter(struct hw_perf_event *event, int idx) WARN_ONCE((config != 0x100), "invalid configuration (%d) for counter (%d)\n", config, idx); - - /* Reset the cycle count */ - __core_reg_set(TXTACTCYC, 0); + local64_set(&event->prev_count, __core_reg_get(TXTACTCYC)); goto unlock; } /* Check for a core internal or performance channel event. */ if (tmp) { - void *perf_addr = (void *)PERF_COUNT(idx); + void *perf_addr; /* * Anything other than a cycle count will write the low- @@ -632,9 +642,14 @@ static void metag_pmu_enable_counter(struct hw_perf_event *event, int idx) case 0xf0: perf_addr = (void *)PERF_CHAN(idx); break; + + default: + perf_addr = NULL; + break; } - metag_out32((tmp & 0x0f), perf_addr); + if (perf_addr) + metag_out32((config & 0x0f), perf_addr); /* * Now we use the high nibble as the performance event to @@ -643,13 +658,21 @@ static void metag_pmu_enable_counter(struct hw_perf_event *event, int idx) config = tmp >> 4; } - /* - * Enabled counters start from 0. Early cores clear the count on - * write but newer cores don't, so we make sure that the count is - * set to 0. - */ tmp = ((config & 0xf) << 28) | - ((1 << 24) << cpu_2_hwthread_id[get_cpu()]); + ((1 << 24) << hard_processor_id()); + if (metag_pmu->max_period) + /* + * Cores supporting overflow interrupts may have had the counter + * set to a specific value that needs preserving. + */ + tmp |= metag_in32(PERF_COUNT(idx)) & 0x00ffffff; + else + /* + * Older cores reset the counter on write, so prev_count needs + * resetting too so we can calculate a correct delta. + */ + local64_set(&event->prev_count, 0); + metag_out32(tmp, PERF_COUNT(idx)); unlock: raw_spin_unlock_irqrestore(&events->pmu_lock, flags); @@ -693,9 +716,8 @@ static u64 metag_pmu_read_counter(int idx) { u32 tmp = 0; - /* The act of reading the cycle counter also clears it */ if (METAG_INST_COUNTER == idx) { - __core_reg_swap(TXTACTCYC, tmp); + tmp = __core_reg_get(TXTACTCYC); goto out; } @@ -764,10 +786,16 @@ static irqreturn_t metag_pmu_counter_overflow(int irq, void *dev) /* * Enable the counter again once core overflow processing has - * completed. + * completed. Note the counter value may have been modified while it was + * inactive to set it up ready for the next interrupt. */ - if (!perf_event_overflow(event, &sampledata, regs)) + if (!perf_event_overflow(event, &sampledata, regs)) { + __global_lock2(flags); + counter = (counter & 0xff000000) | + (metag_in32(PERF_COUNT(idx)) & 0x00ffffff); metag_out32(counter, PERF_COUNT(idx)); + __global_unlock2(flags); + } return IRQ_HANDLED; } @@ -785,8 +813,8 @@ static struct metag_pmu _metag_pmu = { }; /* PMU CPU hotplug notifier */ -static int __cpuinit metag_pmu_cpu_notify(struct notifier_block *b, - unsigned long action, void *hcpu) +static int metag_pmu_cpu_notify(struct notifier_block *b, unsigned long action, + void *hcpu) { unsigned int cpu = (unsigned int)hcpu; struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu); @@ -800,7 +828,7 @@ static int __cpuinit metag_pmu_cpu_notify(struct notifier_block *b, return NOTIFY_OK; } -static struct notifier_block __cpuinitdata metag_pmu_notifier = { +static struct notifier_block metag_pmu_notifier = { .notifier_call = metag_pmu_cpu_notify, }; @@ -830,7 +858,7 @@ static int __init init_hw_perf_events(void) metag_pmu->max_period = 0; } - metag_pmu->name = "Meta 2"; + metag_pmu->name = "meta2"; metag_pmu->version = version; metag_pmu->pmu = pmu; } @@ -854,7 +882,7 @@ static int __init init_hw_perf_events(void) } register_cpu_notifier(&metag_pmu_notifier); - ret = perf_pmu_register(&pmu, (char *)metag_pmu->name, PERF_TYPE_RAW); + ret = perf_pmu_register(&pmu, metag_pmu->name, PERF_TYPE_RAW); out: return ret; } diff --git a/arch/metag/kernel/process.c b/arch/metag/kernel/process.c index c6efe62e5b7..483dff986a2 100644 --- a/arch/metag/kernel/process.c +++ b/arch/metag/kernel/process.c @@ -22,6 +22,7 @@ #include <linux/pm.h> #include <linux/syscalls.h> #include <linux/uaccess.h> +#include <linux/smp.h> #include <asm/core_reg.h> #include <asm/user_gateway.h> #include <asm/tcm.h> @@ -31,7 +32,7 @@ /* * Wait for the next interrupt and enable local interrupts */ -static inline void arch_idle(void) +void arch_cpu_idle(void) { int tmp; @@ -59,36 +60,12 @@ static inline void arch_idle(void) : "r" (get_trigger_mask())); } -void cpu_idle(void) -{ - set_thread_flag(TIF_POLLING_NRFLAG); - - while (1) { - tick_nohz_idle_enter(); - rcu_idle_enter(); - - while (!need_resched()) { - /* - * We need to disable interrupts here to ensure we don't - * miss a wakeup call. - */ - local_irq_disable(); - if (!need_resched()) { #ifdef CONFIG_HOTPLUG_CPU - if (cpu_is_offline(smp_processor_id())) - cpu_die(); -#endif - arch_idle(); - } else { - local_irq_enable(); - } - } - - rcu_idle_exit(); - tick_nohz_idle_exit(); - schedule_preempt_disabled(); - } +void arch_cpu_idle_dead(void) +{ + cpu_die(); } +#endif void (*pm_power_off)(void); EXPORT_SYMBOL(pm_power_off); @@ -152,6 +129,8 @@ void show_regs(struct pt_regs *regs) "D1.7 " }; + show_regs_print_info(KERN_INFO); + pr_info(" pt_regs @ %p\n", regs); pr_info(" SaveMask = 0x%04hx\n", regs->ctx.SaveMask); pr_info(" Flags = 0x%04hx (%c%c%c%c)\n", regs->ctx.Flags, diff --git a/arch/metag/kernel/ptrace.c b/arch/metag/kernel/ptrace.c index 47a8828615a..7563628822b 100644 --- a/arch/metag/kernel/ptrace.c +++ b/arch/metag/kernel/ptrace.c @@ -288,10 +288,36 @@ static int metag_rp_state_set(struct task_struct *target, return metag_rp_state_copyin(regs, pos, count, kbuf, ubuf); } +static int metag_tls_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf) +{ + void __user *tls = target->thread.tls_ptr; + return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &tls, 0, -1); +} + +static int metag_tls_set(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + int ret; + void __user *tls; + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &tls, 0, -1); + if (ret) + return ret; + + target->thread.tls_ptr = tls; + return ret; +} + enum metag_regset { REGSET_GENERAL, REGSET_CBUF, REGSET_READPIPE, + REGSET_TLS, }; static const struct user_regset metag_regsets[] = { @@ -319,6 +345,14 @@ static const struct user_regset metag_regsets[] = { .get = metag_rp_state_get, .set = metag_rp_state_set, }, + [REGSET_TLS] = { + .core_note_type = NT_METAG_TLS, + .n = 1, + .size = sizeof(void *), + .align = sizeof(void *), + .get = metag_tls_get, + .set = metag_tls_set, + }, }; static const struct user_regset_view user_metag_view = { diff --git a/arch/metag/kernel/setup.c b/arch/metag/kernel/setup.c index 879246170ae..31cf53d0eba 100644 --- a/arch/metag/kernel/setup.c +++ b/arch/metag/kernel/setup.c @@ -20,6 +20,7 @@ #include <linux/memblock.h> #include <linux/mm.h> #include <linux/of_fdt.h> +#include <linux/of_platform.h> #include <linux/pfn.h> #include <linux/root_dev.h> #include <linux/sched.h> @@ -41,7 +42,6 @@ #include <asm/mmu.h> #include <asm/mmzone.h> #include <asm/processor.h> -#include <asm/prom.h> #include <asm/sections.h> #include <asm/setup.h> #include <asm/traps.h> @@ -105,16 +105,12 @@ extern char _heap_start[]; -#ifdef CONFIG_METAG_BUILTIN_DTB -extern u32 __dtb_start[]; -#endif - #ifdef CONFIG_DA_CONSOLE /* Our early channel based console driver */ extern struct console dash_console; #endif -struct machine_desc *machine_desc __initdata; +const struct machine_desc *machine_desc __initdata; /* * Map a Linux CPU number to a hardware thread ID @@ -124,6 +120,7 @@ struct machine_desc *machine_desc __initdata; u8 cpu_2_hwthread_id[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = BAD_HWTHREAD_ID }; +EXPORT_SYMBOL_GPL(cpu_2_hwthread_id); /* * Map a hardware thread ID to a Linux CPU number @@ -300,13 +297,9 @@ void __init setup_arch(char **cmdline_p) * rather than the version from the bootloader. This makes call * stacks easier to understand and may allow us to unmap the * bootloader at some point. - * - * We need to keep the LWK handler that TBI installed in order to - * be able to do inter-thread comms. */ for (i = 0; i <= TBID_SIGNUM_MAX; i++) - if (i != TBID_SIGNUM_LWK) - _pTBI->fnSigs[i] = __TBIUnExpXXX; + _pTBI->fnSigs[i] = __TBIUnExpXXX; /* A Meta requirement is that the kernel is loaded (virtually) * at the PAGE_OFFSET. @@ -406,9 +399,7 @@ void __init setup_arch(char **cmdline_p) cpu_2_hwthread_id[smp_processor_id()] = hard_processor_id(); hwthread_id_2_cpu[hard_processor_id()] = smp_processor_id(); - /* Copy device tree blob into non-init memory before unflattening */ - copy_fdt(); - unflatten_device_tree(); + unflatten_and_copy_device_tree(); #ifdef CONFIG_SMP smp_init_cpus(); @@ -423,6 +414,9 @@ static int __init customize_machine(void) /* customizes platform devices, or adds new ones */ if (machine_desc->init_machine) machine_desc->init_machine(); + else + of_platform_populate(NULL, of_default_bus_match_table, NULL, + NULL); return 0; } arch_initcall(customize_machine); @@ -586,20 +580,20 @@ PTBI pTBI_get(unsigned int cpu) EXPORT_SYMBOL(pTBI_get); #if defined(CONFIG_METAG_DSP) && defined(CONFIG_METAG_FPU) -char capabilites[] = "dsp fpu"; +static char capabilities[] = "dsp fpu"; #elif defined(CONFIG_METAG_DSP) -char capabilites[] = "dsp"; +static char capabilities[] = "dsp"; #elif defined(CONFIG_METAG_FPU) -char capabilites[] = "fpu"; +static char capabilities[] = "fpu"; #else -char capabilites[] = ""; +static char capabilities[] = ""; #endif static struct ctl_table caps_kern_table[] = { { .procname = "capabilities", - .data = capabilites, - .maxlen = sizeof(capabilites), + .data = capabilities, + .maxlen = sizeof(capabilities), .mode = 0444, .proc_handler = proc_dostring, }, diff --git a/arch/metag/kernel/signal.c b/arch/metag/kernel/signal.c index 3be61cf0b14..b9e4a82d2bd 100644 --- a/arch/metag/kernel/signal.c +++ b/arch/metag/kernel/signal.c @@ -152,18 +152,18 @@ static void __user *get_sigframe(struct k_sigaction *ka, unsigned long sp, return (void __user *)sp; } -static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, - sigset_t *set, struct pt_regs *regs) +static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, + struct pt_regs *regs) { struct rt_sigframe __user *frame; - int err = -EFAULT; + int err; unsigned long code; - frame = get_sigframe(ka, regs->REG_SP, sizeof(*frame)); + frame = get_sigframe(&ksig->ka, regs->REG_SP, sizeof(*frame)); if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) - goto out; + return -EFAULT; - err = copy_siginfo_to_user(&frame->info, info); + err = copy_siginfo_to_user(&frame->info, &ksig->info); /* Create the ucontext. */ err |= __put_user(0, &frame->uc.uc_flags); @@ -174,7 +174,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); if (err) - goto out; + return -EFAULT; /* Set up to return from userspace. */ @@ -187,15 +187,15 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, err |= __put_user(code, (unsigned long __user *)(&frame->retcode[1])); if (err) - goto out; + return -EFAULT; /* Set up registers for signal handler */ regs->REG_RTP = (unsigned long) frame->retcode; regs->REG_SP = (unsigned long) frame + sizeof(*frame); - regs->REG_ARG1 = sig; + regs->REG_ARG1 = ksig->sig; regs->REG_ARG2 = (unsigned long) &frame->info; regs->REG_ARG3 = (unsigned long) &frame->uc; - regs->REG_PC = (unsigned long) ka->sa.sa_handler; + regs->REG_PC = (unsigned long) ksig->ka.sa.sa_handler; pr_debug("SIG deliver (%s:%d): sp=%p pc=%08x pr=%08x\n", current->comm, current->pid, frame, regs->REG_PC, @@ -205,24 +205,19 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, * effective cache flush - directed rather than 'full flush'. */ flush_cache_sigtramp(regs->REG_RTP, sizeof(frame->retcode)); -out: - if (err) { - force_sigsegv(sig, current); - return -EFAULT; - } + return 0; } -static void handle_signal(unsigned long sig, siginfo_t *info, - struct k_sigaction *ka, struct pt_regs *regs) +static void handle_signal(struct ksignal *ksig, struct pt_regs *regs) { sigset_t *oldset = sigmask_to_save(); + int ret; /* Set up the stack frame */ - if (setup_rt_frame(sig, ka, info, oldset, regs)) - return; + ret = setup_rt_frame(ksig, oldset, regs); - signal_delivered(sig, info, ka, regs, test_thread_flag(TIF_SINGLESTEP)); + signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP)); } /* @@ -235,10 +230,8 @@ static void handle_signal(unsigned long sig, siginfo_t *info, static int do_signal(struct pt_regs *regs, int syscall) { unsigned int retval = 0, continue_addr = 0, restart_addr = 0; - struct k_sigaction ka; - siginfo_t info; - int signr; int restart = 0; + struct ksignal ksig; /* * By the end of rt_sigreturn the context describes the point that the @@ -275,7 +268,8 @@ static int do_signal(struct pt_regs *regs, int syscall) * Get the signal to deliver. When running under ptrace, at this point * the debugger may change all our registers ... */ - signr = get_signal_to_deliver(&info, &ka, regs, NULL); + get_signal(&ksig); + /* * Depending on the signal settings we may need to revert the decision * to restart the system call. But skip this if a debugger has chosen to @@ -283,19 +277,19 @@ static int do_signal(struct pt_regs *regs, int syscall) */ if (regs->REG_PC != restart_addr) restart = 0; - if (signr > 0) { + if (ksig.sig > 0) { if (unlikely(restart)) { if (retval == -ERESTARTNOHAND || retval == -ERESTART_RESTARTBLOCK || (retval == -ERESTARTSYS - && !(ka.sa.sa_flags & SA_RESTART))) { + && !(ksig.ka.sa.sa_flags & SA_RESTART))) { regs->REG_RETVAL = -EINTR; regs->REG_PC = continue_addr; } } /* Whee! Actually deliver the signal. */ - handle_signal(signr, &info, &ka, regs); + handle_signal(&ksig, regs); return 0; } diff --git a/arch/metag/kernel/smp.c b/arch/metag/kernel/smp.c index 4b6d1f14df3..f006d2276f4 100644 --- a/arch/metag/kernel/smp.c +++ b/arch/metag/kernel/smp.c @@ -8,6 +8,7 @@ * published by the Free Software Foundation. */ #include <linux/atomic.h> +#include <linux/completion.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/spinlock.h> @@ -28,6 +29,8 @@ #include <asm/cachepart.h> #include <asm/core_reg.h> #include <asm/cpu.h> +#include <asm/global_lock.h> +#include <asm/metag_mem.h> #include <asm/mmu_context.h> #include <asm/pgtable.h> #include <asm/pgalloc.h> @@ -37,6 +40,9 @@ #include <asm/hwthread.h> #include <asm/traps.h> +#define SYSC_DCPART(n) (SYSC_DCPART0 + SYSC_xCPARTn_STRIDE * (n)) +#define SYSC_ICPART(n) (SYSC_ICPART0 + SYSC_xCPARTn_STRIDE * (n)) + DECLARE_PER_CPU(PTBI, pTBI); void *secondary_data_stack; @@ -57,10 +63,12 @@ static DEFINE_PER_CPU(struct ipi_data, ipi_data) = { static DEFINE_SPINLOCK(boot_lock); +static DECLARE_COMPLETION(cpu_running); + /* * "thread" is assumed to be a valid Meta hardware thread ID. */ -int __cpuinit boot_secondary(unsigned int thread, struct task_struct *idle) +static int boot_secondary(unsigned int thread, struct task_struct *idle) { u32 val; @@ -99,7 +107,113 @@ int __cpuinit boot_secondary(unsigned int thread, struct task_struct *idle) return 0; } -int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle) +/** + * describe_cachepart_change: describe a change to cache partitions. + * @thread: Hardware thread number. + * @label: Label of cache type, e.g. "dcache" or "icache". + * @sz: Total size of the cache. + * @old: Old cache partition configuration (*CPART* register). + * @new: New cache partition configuration (*CPART* register). + * + * If the cache partition has changed, prints a message to the log describing + * those changes. + */ +static void describe_cachepart_change(unsigned int thread, const char *label, + unsigned int sz, unsigned int old, + unsigned int new) +{ + unsigned int lor1, land1, gor1, gand1; + unsigned int lor2, land2, gor2, gand2; + unsigned int diff = old ^ new; + + if (!diff) + return; + + pr_info("Thread %d: %s partition changed:", thread, label); + if (diff & (SYSC_xCPARTL_OR_BITS | SYSC_xCPARTL_AND_BITS)) { + lor1 = (old & SYSC_xCPARTL_OR_BITS) >> SYSC_xCPARTL_OR_S; + lor2 = (new & SYSC_xCPARTL_OR_BITS) >> SYSC_xCPARTL_OR_S; + land1 = (old & SYSC_xCPARTL_AND_BITS) >> SYSC_xCPARTL_AND_S; + land2 = (new & SYSC_xCPARTL_AND_BITS) >> SYSC_xCPARTL_AND_S; + pr_cont(" L:%#x+%#x->%#x+%#x", + (lor1 * sz) >> 4, + ((land1 + 1) * sz) >> 4, + (lor2 * sz) >> 4, + ((land2 + 1) * sz) >> 4); + } + if (diff & (SYSC_xCPARTG_OR_BITS | SYSC_xCPARTG_AND_BITS)) { + gor1 = (old & SYSC_xCPARTG_OR_BITS) >> SYSC_xCPARTG_OR_S; + gor2 = (new & SYSC_xCPARTG_OR_BITS) >> SYSC_xCPARTG_OR_S; + gand1 = (old & SYSC_xCPARTG_AND_BITS) >> SYSC_xCPARTG_AND_S; + gand2 = (new & SYSC_xCPARTG_AND_BITS) >> SYSC_xCPARTG_AND_S; + pr_cont(" G:%#x+%#x->%#x+%#x", + (gor1 * sz) >> 4, + ((gand1 + 1) * sz) >> 4, + (gor2 * sz) >> 4, + ((gand2 + 1) * sz) >> 4); + } + if (diff & SYSC_CWRMODE_BIT) + pr_cont(" %sWR", + (new & SYSC_CWRMODE_BIT) ? "+" : "-"); + if (diff & SYSC_DCPART_GCON_BIT) + pr_cont(" %sGCOn", + (new & SYSC_DCPART_GCON_BIT) ? "+" : "-"); + pr_cont("\n"); +} + +/** + * setup_smp_cache: ensure cache coherency for new SMP thread. + * @thread: New hardware thread number. + * + * Ensures that coherency is enabled and that the threads share the same cache + * partitions. + */ +static void setup_smp_cache(unsigned int thread) +{ + unsigned int this_thread, lflags; + unsigned int dcsz, dcpart_this, dcpart_old, dcpart_new; + unsigned int icsz, icpart_old, icpart_new; + + /* + * Copy over the current thread's cache partition configuration to the + * new thread so that they share cache partitions. + */ + __global_lock2(lflags); + this_thread = hard_processor_id(); + /* Share dcache partition */ + dcpart_this = metag_in32(SYSC_DCPART(this_thread)); + dcpart_old = metag_in32(SYSC_DCPART(thread)); + dcpart_new = dcpart_this; +#if PAGE_OFFSET < LINGLOBAL_BASE + /* + * For the local data cache to be coherent the threads must also have + * GCOn enabled. + */ + dcpart_new |= SYSC_DCPART_GCON_BIT; + metag_out32(dcpart_new, SYSC_DCPART(this_thread)); +#endif + metag_out32(dcpart_new, SYSC_DCPART(thread)); + /* Share icache partition too */ + icpart_new = metag_in32(SYSC_ICPART(this_thread)); + icpart_old = metag_in32(SYSC_ICPART(thread)); + metag_out32(icpart_new, SYSC_ICPART(thread)); + __global_unlock2(lflags); + + /* + * Log if the cache partitions were altered so the user is aware of any + * potential unintentional cache wastage. + */ + dcsz = get_dcache_size(); + icsz = get_dcache_size(); + describe_cachepart_change(this_thread, "dcache", dcsz, + dcpart_this, dcpart_new); + describe_cachepart_change(thread, "dcache", dcsz, + dcpart_old, dcpart_new); + describe_cachepart_change(thread, "icache", icsz, + icpart_old, icpart_new); +} + +int __cpu_up(unsigned int cpu, struct task_struct *idle) { unsigned int thread = cpu_2_hwthread_id[cpu]; int ret; @@ -108,6 +222,8 @@ int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle) flush_tlb_all(); + setup_smp_cache(thread); + /* * Tell the secondary CPU where to find its idle thread's stack. */ @@ -120,20 +236,12 @@ int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle) */ ret = boot_secondary(thread, idle); if (ret == 0) { - unsigned long timeout; - /* * CPU was successfully started, wait for it * to come online or time out. */ - timeout = jiffies + HZ; - while (time_before(jiffies, timeout)) { - if (cpu_online(cpu)) - break; - - udelay(10); - barrier(); - } + wait_for_completion_timeout(&cpu_running, + msecs_to_jiffies(1000)); if (!cpu_online(cpu)) ret = -EIO; @@ -158,10 +266,9 @@ static DECLARE_COMPLETION(cpu_killed); /* * __cpu_disable runs on the processor to be shutdown. */ -int __cpuexit __cpu_disable(void) +int __cpu_disable(void) { unsigned int cpu = smp_processor_id(); - struct task_struct *p; /* * Take this CPU offline. Once we clear this, we can't return, @@ -181,12 +288,7 @@ int __cpuexit __cpu_disable(void) flush_cache_all(); local_flush_tlb_all(); - read_lock(&tasklist_lock); - for_each_process(p) { - if (p->mm) - cpumask_clear_cpu(cpu, mm_cpumask(p->mm)); - } - read_unlock(&tasklist_lock); + clear_tasks_mm_cpumask(cpu); return 0; } @@ -195,7 +297,7 @@ int __cpuexit __cpu_disable(void) * called on the thread which is asking for a CPU to be shutdown - * waits until shutdown has completed, or it is timed out. */ -void __cpuexit __cpu_die(unsigned int cpu) +void __cpu_die(unsigned int cpu) { if (!wait_for_completion_timeout(&cpu_killed, msecs_to_jiffies(1))) pr_err("CPU%u: unable to kill\n", cpu); @@ -207,7 +309,7 @@ void __cpuexit __cpu_die(unsigned int cpu) * Note that we do not return from this function. If this cpu is * brought online again it will need to run secondary_startup(). */ -void __cpuexit cpu_die(void) +void cpu_die(void) { local_irq_disable(); idle_task_exit(); @@ -222,7 +324,7 @@ void __cpuexit cpu_die(void) * Called by both boot and secondaries to move global data into * per-processor storage. */ -void __cpuinit smp_store_cpu_info(unsigned int cpuid) +void smp_store_cpu_info(unsigned int cpuid) { struct cpuinfo_metag *cpu_info = &per_cpu(cpu_data, cpuid); @@ -270,12 +372,7 @@ asmlinkage void secondary_start_kernel(void) setup_priv(); - /* - * Enable local interrupts. - */ - tbi_startup_interrupt(TBID_SIGNUM_TRT); notify_cpu_starting(cpu); - local_irq_enable(); pr_info("CPU%u (thread %u): Booted secondary processor\n", cpu, cpu_2_hwthread_id[cpu]); @@ -287,17 +384,18 @@ asmlinkage void secondary_start_kernel(void) * OK, now it's safe to let the boot CPU continue */ set_cpu_online(cpu, true); + complete(&cpu_running); /* - * Check for cache aliasing. - * Preemption is disabled + * Enable local interrupts. */ - check_for_cache_aliasing(cpu); + tbi_startup_interrupt(TBID_SIGNUM_TRT); + local_irq_enable(); /* * OK, it's off to the idle thread for us */ - cpu_idle(); + cpu_startup_entry(CPUHP_ONLINE); } void __init smp_cpus_done(unsigned int max_cpus) @@ -393,7 +491,7 @@ void arch_send_call_function_ipi_mask(const struct cpumask *mask) void arch_send_call_function_single_ipi(int cpu) { - send_ipi_message(cpumask_of(cpu), IPI_CALL_FUNC_SINGLE); + send_ipi_message(cpumask_of(cpu), IPI_CALL_FUNC); } void show_ipi_list(struct seq_file *p) @@ -419,11 +517,10 @@ static DEFINE_SPINLOCK(stop_lock); * * Bit 0 - Inter-processor function call */ -static int do_IPI(struct pt_regs *regs) +static int do_IPI(void) { unsigned int cpu = smp_processor_id(); struct ipi_data *ipi = &per_cpu(ipi_data, cpu); - struct pt_regs *old_regs = set_irq_regs(regs); unsigned long msgs, nextmsg; int handled = 0; @@ -448,10 +545,6 @@ static int do_IPI(struct pt_regs *regs) generic_smp_call_function_interrupt(); break; - case IPI_CALL_FUNC_SINGLE: - generic_smp_call_function_single_interrupt(); - break; - default: pr_crit("CPU%u: Unknown IPI message 0x%lx\n", cpu, nextmsg); @@ -459,8 +552,6 @@ static int do_IPI(struct pt_regs *regs) } } - set_irq_regs(old_regs); - return handled; } @@ -526,7 +617,7 @@ static void kick_raise_softirq(cpumask_t callmap, unsigned int irq) static TBIRES ipi_handler(TBIRES State, int SigNum, int Triggers, int Inst, PTBI pTBI, int *handled) { - *handled = do_IPI((struct pt_regs *)State.Sig.pCtx); + *handled = do_IPI(); return State; } diff --git a/arch/metag/kernel/time.c b/arch/metag/kernel/time.c index 17dc10733b2..f1c8c53dace 100644 --- a/arch/metag/kernel/time.c +++ b/arch/metag/kernel/time.c @@ -5,11 +5,21 @@ * */ -#include <linux/init.h> - #include <clocksource/metag_generic.h> +#include <linux/clk-provider.h> +#include <linux/init.h> +#include <asm/clock.h> void __init time_init(void) { +#ifdef CONFIG_COMMON_CLK + /* Init clocks from device tree */ + of_clk_init(NULL); +#endif + + /* Init meta clocks, particularly the core clock */ + init_metag_clocks(); + + /* Set up the timer clock sources */ metag_generic_timer_init(); } diff --git a/arch/metag/kernel/topology.c b/arch/metag/kernel/topology.c index bec3dec4922..4ba595701f7 100644 --- a/arch/metag/kernel/topology.c +++ b/arch/metag/kernel/topology.c @@ -19,6 +19,7 @@ DEFINE_PER_CPU(struct cpuinfo_metag, cpu_data); cpumask_t cpu_core_map[NR_CPUS]; +EXPORT_SYMBOL(cpu_core_map); static cpumask_t cpu_coregroup_map(unsigned int cpu) { diff --git a/arch/metag/kernel/traps.c b/arch/metag/kernel/traps.c index 8961f247b50..17b2e2e38d5 100644 --- a/arch/metag/kernel/traps.c +++ b/arch/metag/kernel/traps.c @@ -33,6 +33,7 @@ #include <asm/siginfo.h> #include <asm/traps.h> #include <asm/hwthread.h> +#include <asm/setup.h> #include <asm/switch.h> #include <asm/user_gateway.h> #include <asm/syscall.h> @@ -87,8 +88,8 @@ const char *trap_name(int trapno) static DEFINE_SPINLOCK(die_lock); -void die(const char *str, struct pt_regs *regs, long err, - unsigned long addr) +void __noreturn die(const char *str, struct pt_regs *regs, + long err, unsigned long addr) { static int die_counter; @@ -811,15 +812,14 @@ static void set_trigger_mask(unsigned int mask) } #endif -void __cpuinit per_cpu_trap_init(unsigned long cpu) +void per_cpu_trap_init(unsigned long cpu) { TBIRES int_context; unsigned int thread = cpu_2_hwthread_id[cpu]; set_trigger_mask(TBI_INTS_INIT(thread) | /* interrupts */ TBI_TRIG_BIT(TBID_SIGNUM_LWK) | /* low level kick */ - TBI_TRIG_BIT(TBID_SIGNUM_SW1) | - TBI_TRIG_BIT(TBID_SIGNUM_SWS)); + TBI_TRIG_BIT(TBID_SIGNUM_SW1)); /* non-priv - use current stack */ int_context.Sig.pCtx = NULL; @@ -841,7 +841,7 @@ void __init trap_init(void) _pTBI->fnSigs[TBID_SIGNUM_SW1] = switch1_handler; _pTBI->fnSigs[TBID_SIGNUM_SW2] = switchx_handler; _pTBI->fnSigs[TBID_SIGNUM_SW3] = switchx_handler; - _pTBI->fnSigs[TBID_SIGNUM_SWK] = kick_handler; + _pTBI->fnSigs[TBID_SIGNUM_LWK] = kick_handler; #ifdef CONFIG_METAG_META21 _pTBI->fnSigs[TBID_SIGNUM_DFR] = __TBIHandleDFR; @@ -987,9 +987,3 @@ void show_stack(struct task_struct *tsk, unsigned long *sp) show_trace(tsk, sp, NULL); } - -void dump_stack(void) -{ - show_stack(NULL, NULL); -} -EXPORT_SYMBOL(dump_stack); diff --git a/arch/metag/lib/checksum.c b/arch/metag/lib/checksum.c index 44d2e191356..5d6a98a05e9 100644 --- a/arch/metag/lib/checksum.c +++ b/arch/metag/lib/checksum.c @@ -124,7 +124,6 @@ __wsum csum_partial(const void *buff, int len, __wsum wsum) result += 1; return (__force __wsum)result; } -EXPORT_SYMBOL(csum_partial); /* * this routine is used for miscellaneous IP-like checksums, mainly diff --git a/arch/metag/mm/Kconfig b/arch/metag/mm/Kconfig index 975f2f4e3ec..03fb8f1555a 100644 --- a/arch/metag/mm/Kconfig +++ b/arch/metag/mm/Kconfig @@ -93,14 +93,6 @@ config ARCH_SPARSEMEM_ENABLE config ARCH_SPARSEMEM_DEFAULT def_bool y -config MAX_ACTIVE_REGIONS - int - default "2" if SPARSEMEM - default "1" - -config ARCH_POPULATES_NODE_MAP - def_bool y - config ARCH_SELECT_MEMORY_MODEL def_bool y diff --git a/arch/metag/mm/cache.c b/arch/metag/mm/cache.c index b5d3b2e7c16..a62285284ab 100644 --- a/arch/metag/mm/cache.c +++ b/arch/metag/mm/cache.c @@ -45,7 +45,7 @@ static volatile u32 lnkget_testdata[16] __initdata __aligned(64); #define LNKGET_CONSTANT 0xdeadbeef -void __init metag_lnkget_probe(void) +static void __init metag_lnkget_probe(void) { int temp; long flags; diff --git a/arch/metag/mm/fault.c b/arch/metag/mm/fault.c index 2c75bf7357c..332680e5ebf 100644 --- a/arch/metag/mm/fault.c +++ b/arch/metag/mm/fault.c @@ -53,8 +53,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, struct vm_area_struct *vma, *prev_vma; siginfo_t info; int fault; - unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE | - (write_access ? FAULT_FLAG_WRITE : 0); + unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE; tsk = current; @@ -109,6 +108,8 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, if (in_atomic() || !mm) goto no_context; + if (user_mode(regs)) + flags |= FAULT_FLAG_USER; retry: down_read(&mm->mmap_sem); @@ -121,6 +122,7 @@ good_area: if (write_access) { if (!(vma->vm_flags & VM_WRITE)) goto bad_area; + flags |= FAULT_FLAG_WRITE; } else { if (!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE))) goto bad_area; @@ -224,8 +226,10 @@ do_sigbus: */ out_of_memory: up_read(&mm->mmap_sem); - if (user_mode(regs)) - do_group_exit(SIGKILL); + if (user_mode(regs)) { + pagefault_out_of_memory(); + return 1; + } no_context: /* Are we prepared to handle this kernel fault? */ diff --git a/arch/metag/mm/init.c b/arch/metag/mm/init.c index 504a398d5f8..11fa51c8961 100644 --- a/arch/metag/mm/init.c +++ b/arch/metag/mm/init.c @@ -12,7 +12,6 @@ #include <linux/percpu.h> #include <linux/memblock.h> #include <linux/initrd.h> -#include <linux/of_fdt.h> #include <asm/setup.h> #include <asm/page.h> @@ -149,7 +148,7 @@ static void __init bootmem_init_one_node(unsigned int nid) if (!p->node_spanned_pages) return; - end_pfn = p->node_start_pfn + p->node_spanned_pages; + end_pfn = pgdat_end_pfn(p); #ifdef CONFIG_HIGHMEM if (end_pfn > max_low_pfn) end_pfn = max_low_pfn; @@ -205,7 +204,8 @@ static void __init do_init_bootmem(void) start_pfn = memblock_region_memory_base_pfn(reg); end_pfn = memblock_region_memory_end_pfn(reg); memblock_set_node(PFN_PHYS(start_pfn), - PFN_PHYS(end_pfn - start_pfn), 0); + PFN_PHYS(end_pfn - start_pfn), + &memblock.memory, 0); } /* All of system RAM sits in node 0 for the non-NUMA case */ @@ -376,76 +376,32 @@ void __init paging_init(unsigned long mem_end) void __init mem_init(void) { - int nid; - #ifdef CONFIG_HIGHMEM unsigned long tmp; - for (tmp = highstart_pfn; tmp < highend_pfn; tmp++) { - struct page *page = pfn_to_page(tmp); - ClearPageReserved(page); - init_page_count(page); - __free_page(page); - totalhigh_pages++; - } - totalram_pages += totalhigh_pages; - num_physpages += totalhigh_pages; -#endif /* CONFIG_HIGHMEM */ - - for_each_online_node(nid) { - pg_data_t *pgdat = NODE_DATA(nid); - unsigned long node_pages = 0; - - num_physpages += pgdat->node_present_pages; - - if (pgdat->node_spanned_pages) - node_pages = free_all_bootmem_node(pgdat); - - totalram_pages += node_pages; - } - pr_info("Memory: %luk/%luk available\n", - (unsigned long)nr_free_pages() << (PAGE_SHIFT - 10), - num_physpages << (PAGE_SHIFT - 10)); + /* + * Explicitly reset zone->managed_pages because highmem pages are + * freed before calling free_all_bootmem(); + */ + reset_all_zones_managed_pages(); + for (tmp = highstart_pfn; tmp < highend_pfn; tmp++) + free_highmem_page(pfn_to_page(tmp)); +#endif /* CONFIG_HIGHMEM */ + free_all_bootmem(); + mem_init_print_info(NULL); show_mem(0); - - return; -} - -static void free_init_pages(char *what, unsigned long begin, unsigned long end) -{ - unsigned long addr; - - for (addr = begin; addr < end; addr += PAGE_SIZE) { - ClearPageReserved(virt_to_page(addr)); - init_page_count(virt_to_page(addr)); - memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE); - free_page(addr); - totalram_pages++; - } - pr_info("Freeing %s: %luk freed\n", what, (end - begin) >> 10); } void free_initmem(void) { - free_init_pages("unused kernel memory", - (unsigned long)(&__init_begin), - (unsigned long)(&__init_end)); + free_initmem_default(POISON_FREE_INITMEM); } #ifdef CONFIG_BLK_DEV_INITRD void free_initrd_mem(unsigned long start, unsigned long end) { - end = end & PAGE_MASK; - free_init_pages("initrd memory", start, end); + free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM, + "initrd"); } #endif - -#ifdef CONFIG_OF_FLATTREE -void __init early_init_dt_setup_initrd_arch(unsigned long start, - unsigned long end) -{ - pr_err("%s(%lx, %lx)\n", - __func__, start, end); -} -#endif /* CONFIG_OF_FLATTREE */ diff --git a/arch/metag/mm/numa.c b/arch/metag/mm/numa.c index 9ae578c9b62..67b46c29507 100644 --- a/arch/metag/mm/numa.c +++ b/arch/metag/mm/numa.c @@ -34,7 +34,7 @@ void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end) unsigned long pgdat_paddr; /* Don't allow bogus node assignment */ - BUG_ON(nid > MAX_NUMNODES || nid <= 0); + BUG_ON(nid >= MAX_NUMNODES || nid <= 0); start_pfn = start >> PAGE_SHIFT; end_pfn = end >> PAGE_SHIFT; @@ -42,7 +42,8 @@ void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end) memblock_add(start, end - start); memblock_set_node(PFN_PHYS(start_pfn), - PFN_PHYS(end_pfn - start_pfn), nid); + PFN_PHYS(end_pfn - start_pfn), + &memblock.memory, nid); /* Node-local pgdat */ pgdat_paddr = memblock_alloc_base(sizeof(struct pglist_data), diff --git a/arch/metag/oprofile/Makefile b/arch/metag/oprofile/Makefile new file mode 100644 index 00000000000..c9639d4734d --- /dev/null +++ b/arch/metag/oprofile/Makefile @@ -0,0 +1,17 @@ +obj-$(CONFIG_OPROFILE) += oprofile.o + +oprofile-core-y += buffer_sync.o +oprofile-core-y += cpu_buffer.o +oprofile-core-y += event_buffer.o +oprofile-core-y += oprof.o +oprofile-core-y += oprofile_files.o +oprofile-core-y += oprofile_stats.o +oprofile-core-y += oprofilefs.o +oprofile-core-y += timer_int.o +oprofile-core-$(CONFIG_HW_PERF_EVENTS) += oprofile_perf.o + +oprofile-y += backtrace.o +oprofile-y += common.o +oprofile-y += $(addprefix ../../../drivers/oprofile/,$(oprofile-core-y)) + +ccflags-y += -Werror diff --git a/arch/metag/oprofile/backtrace.c b/arch/metag/oprofile/backtrace.c new file mode 100644 index 00000000000..7cc3f37cb40 --- /dev/null +++ b/arch/metag/oprofile/backtrace.c @@ -0,0 +1,63 @@ +/* + * Copyright (C) 2010-2013 Imagination Technologies Ltd. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/oprofile.h> +#include <linux/uaccess.h> +#include <asm/processor.h> +#include <asm/stacktrace.h> + +#include "backtrace.h" + +static void user_backtrace_fp(unsigned long __user *fp, unsigned int depth) +{ + while (depth-- && access_ok(VERIFY_READ, fp, 8)) { + unsigned long addr; + unsigned long __user *fpnew; + if (__copy_from_user_inatomic(&addr, fp + 1, sizeof(addr))) + break; + addr -= 4; + + oprofile_add_trace(addr); + + /* stack grows up, so frame pointers must decrease */ + if (__copy_from_user_inatomic(&fpnew, fp + 0, sizeof(fpnew))) + break; + if (fpnew >= fp) + break; + fp = fpnew; + } +} + +static int kernel_backtrace_frame(struct stackframe *frame, void *data) +{ + unsigned int *depth = data; + + oprofile_add_trace(frame->pc); + + /* decrement depth and stop if we reach 0 */ + if ((*depth)-- == 0) + return 1; + + /* otherwise onto the next frame */ + return 0; +} + +void metag_backtrace(struct pt_regs * const regs, unsigned int depth) +{ + if (user_mode(regs)) { + unsigned long *fp = (unsigned long *)regs->ctx.AX[1].U0; + user_backtrace_fp((unsigned long __user __force *)fp, depth); + } else { + struct stackframe frame; + frame.fp = regs->ctx.AX[1].U0; /* A0FrP */ + frame.sp = user_stack_pointer(regs); /* A0StP */ + frame.lr = 0; /* from stack */ + frame.pc = regs->ctx.CurrPC; /* PC */ + walk_stackframe(&frame, &kernel_backtrace_frame, &depth); + } +} diff --git a/arch/metag/oprofile/backtrace.h b/arch/metag/oprofile/backtrace.h new file mode 100644 index 00000000000..c0fcc4265ab --- /dev/null +++ b/arch/metag/oprofile/backtrace.h @@ -0,0 +1,6 @@ +#ifndef _METAG_OPROFILE_BACKTRACE_H +#define _METAG_OPROFILE_BACKTRACE_H + +void metag_backtrace(struct pt_regs * const regs, unsigned int depth); + +#endif diff --git a/arch/metag/oprofile/common.c b/arch/metag/oprofile/common.c new file mode 100644 index 00000000000..ba26152b3c0 --- /dev/null +++ b/arch/metag/oprofile/common.c @@ -0,0 +1,66 @@ +/* + * arch/metag/oprofile/common.c + * + * Copyright (C) 2013 Imagination Technologies Ltd. + * + * Based on arch/sh/oprofile/common.c: + * + * Copyright (C) 2003 - 2010 Paul Mundt + * + * Based on arch/mips/oprofile/common.c: + * + * Copyright (C) 2004, 2005 Ralf Baechle + * Copyright (C) 2005 MIPS Technologies, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/oprofile.h> +#include <linux/perf_event.h> +#include <linux/slab.h> + +#include "backtrace.h" + +#ifdef CONFIG_HW_PERF_EVENTS +/* + * This will need to be reworked when multiple PMUs are supported. + */ +static char *metag_pmu_op_name; + +char *op_name_from_perf_id(void) +{ + return metag_pmu_op_name; +} + +int __init oprofile_arch_init(struct oprofile_operations *ops) +{ + ops->backtrace = metag_backtrace; + + if (perf_num_counters() == 0) + return -ENODEV; + + metag_pmu_op_name = kasprintf(GFP_KERNEL, "metag/%s", + perf_pmu_name()); + if (unlikely(!metag_pmu_op_name)) + return -ENOMEM; + + return oprofile_perf_init(ops); +} + +void oprofile_arch_exit(void) +{ + oprofile_perf_exit(); + kfree(metag_pmu_op_name); +} +#else +int __init oprofile_arch_init(struct oprofile_operations *ops) +{ + ops->backtrace = metag_backtrace; + /* fall back to timer interrupt PC sampling */ + return -ENODEV; +} +void oprofile_arch_exit(void) {} +#endif /* CONFIG_HW_PERF_EVENTS */ diff --git a/arch/metag/tbx/tbidefr.S b/arch/metag/tbx/tbidefr.S index 3eb165ebf54..8f0902b22f7 100644 --- a/arch/metag/tbx/tbidefr.S +++ b/arch/metag/tbx/tbidefr.S @@ -20,7 +20,7 @@ /* D1Ar1:D0Ar2 -- State * D0Ar3 -- SigNum * D0Ar4 -- Triggers - * D1Ar5 -- InstOrSWSId + * D1Ar5 -- Inst * D0Ar6 -- pTBI (volatile) */ ___TBIHandleDFR: |