diff options
Diffstat (limited to 'arch/arm/include/asm')
23 files changed, 235 insertions, 534 deletions
diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h index ed2e95d46e29..62e75475e57e 100644 --- a/arch/arm/include/asm/arch_timer.h +++ b/arch/arm/include/asm/arch_timer.h @@ -1,7 +1,10 @@ #ifndef __ASMARM_ARCH_TIMER_H #define __ASMARM_ARCH_TIMER_H +#include <asm/errno.h> + #ifdef CONFIG_ARM_ARCH_TIMER +#define ARCH_HAS_READ_CURRENT_TIMER int arch_timer_of_register(void); int arch_timer_sched_clock_init(void); #else diff --git a/arch/arm/include/asm/atomic.h b/arch/arm/include/asm/atomic.h index 68374ba6a943..c79f61faa3a5 100644 --- a/arch/arm/include/asm/atomic.h +++ b/arch/arm/include/asm/atomic.h @@ -243,7 +243,7 @@ typedef struct { #define ATOMIC64_INIT(i) { (i) } -static inline u64 atomic64_read(atomic64_t *v) +static inline u64 atomic64_read(const atomic64_t *v) { u64 result; diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h index 004c1bc95d2b..e4448e16046d 100644 --- a/arch/arm/include/asm/cacheflush.h +++ b/arch/arm/include/asm/cacheflush.h @@ -215,7 +215,9 @@ static inline void vivt_flush_cache_mm(struct mm_struct *mm) static inline void vivt_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { - if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm))) + struct mm_struct *mm = vma->vm_mm; + + if (!mm || cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm))) __cpuc_flush_user_range(start & PAGE_MASK, PAGE_ALIGN(end), vma->vm_flags); } @@ -223,7 +225,9 @@ vivt_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned static inline void vivt_flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned long pfn) { - if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm))) { + struct mm_struct *mm = vma->vm_mm; + + if (!mm || cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm))) { unsigned long addr = user_addr & PAGE_MASK; __cpuc_flush_user_range(addr, addr + PAGE_SIZE, vma->vm_flags); } diff --git a/arch/arm/include/asm/delay.h b/arch/arm/include/asm/delay.h index b2deda181549..dc6145120de3 100644 --- a/arch/arm/include/asm/delay.h +++ b/arch/arm/include/asm/delay.h @@ -6,9 +6,22 @@ #ifndef __ASM_ARM_DELAY_H #define __ASM_ARM_DELAY_H +#include <asm/memory.h> #include <asm/param.h> /* HZ */ -extern void __delay(int loops); +#define MAX_UDELAY_MS 2 +#define UDELAY_MULT ((UL(2199023) * HZ) >> 11) +#define UDELAY_SHIFT 30 + +#ifndef __ASSEMBLY__ + +extern struct arm_delay_ops { + void (*delay)(unsigned long); + void (*const_udelay)(unsigned long); + void (*udelay)(unsigned long); +} arm_delay_ops; + +#define __delay(n) arm_delay_ops.delay(n) /* * This function intentionally does not exist; if you see references to @@ -23,22 +36,27 @@ extern void __bad_udelay(void); * division by multiplication: you don't have to worry about * loss of precision. * - * Use only for very small delays ( < 1 msec). Should probably use a + * Use only for very small delays ( < 2 msec). Should probably use a * lookup table, really, as the multiplications take much too long with * short delays. This is a "reasonable" implementation, though (and the * first constant multiplications gets optimized away if the delay is * a constant) */ -extern void __udelay(unsigned long usecs); -extern void __const_udelay(unsigned long); - -#define MAX_UDELAY_MS 2 +#define __udelay(n) arm_delay_ops.udelay(n) +#define __const_udelay(n) arm_delay_ops.const_udelay(n) #define udelay(n) \ (__builtin_constant_p(n) ? \ ((n) > (MAX_UDELAY_MS * 1000) ? __bad_udelay() : \ - __const_udelay((n) * ((2199023U*HZ)>>11))) : \ + __const_udelay((n) * UDELAY_MULT)) : \ __udelay(n)) +/* Loop-based definitions for assembly code. */ +extern void __loop_delay(unsigned long loops); +extern void __loop_udelay(unsigned long usecs); +extern void __loop_const_udelay(unsigned long); + +#endif /* __ASSEMBLY__ */ + #endif /* defined(_ARM_DELAY_H) */ diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index bbef15d04890..2ae842df4551 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -186,17 +186,6 @@ extern int arm_dma_mmap(struct device *dev, struct vm_area_struct *vma, void *cpu_addr, dma_addr_t dma_addr, size_t size, struct dma_attrs *attrs); -#define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, NULL) - -static inline int dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma, - void *cpu_addr, dma_addr_t dma_addr, - size_t size, struct dma_attrs *attrs) -{ - struct dma_map_ops *ops = get_dma_ops(dev); - BUG_ON(!ops); - return ops->mmap(dev, vma, cpu_addr, dma_addr, size, attrs); -} - static inline void *dma_alloc_writecombine(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag) { @@ -213,20 +202,12 @@ static inline void dma_free_writecombine(struct device *dev, size_t size, return dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs); } -static inline int dma_mmap_writecombine(struct device *dev, struct vm_area_struct *vma, - void *cpu_addr, dma_addr_t dma_addr, size_t size) -{ - DEFINE_DMA_ATTRS(attrs); - dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs); - return dma_mmap_attrs(dev, vma, cpu_addr, dma_addr, size, &attrs); -} - /* * This can be called during boot to increase the size of the consistent * DMA region above it's default value of 2MB. It must be called before the * memory allocator is initialised, i.e. before any core_initcall. */ -extern void __init init_consistent_dma_size(unsigned long size); +static inline void init_consistent_dma_size(unsigned long size) { } /* * For SA-1111, IXP425, and ADI systems the dma-mapping functions are "magic" @@ -280,6 +261,9 @@ extern void arm_dma_sync_sg_for_cpu(struct device *, struct scatterlist *, int, enum dma_data_direction); extern void arm_dma_sync_sg_for_device(struct device *, struct scatterlist *, int, enum dma_data_direction); +extern int arm_dma_get_sgtable(struct device *dev, struct sg_table *sgt, + void *cpu_addr, dma_addr_t dma_addr, size_t size, + struct dma_attrs *attrs); #endif /* __KERNEL__ */ #endif diff --git a/arch/arm/include/asm/domain.h b/arch/arm/include/asm/domain.h index 3d2220498abc..6ddbe446425e 100644 --- a/arch/arm/include/asm/domain.h +++ b/arch/arm/include/asm/domain.h @@ -60,13 +60,13 @@ #ifndef __ASSEMBLY__ #ifdef CONFIG_CPU_USE_DOMAINS -#define set_domain(x) \ - do { \ - __asm__ __volatile__( \ - "mcr p15, 0, %0, c3, c0 @ set domain" \ - : : "r" (x)); \ - isb(); \ - } while (0) +static inline void set_domain(unsigned val) +{ + asm volatile( + "mcr p15, 0, %0, c3, c0 @ set domain" + : : "r" (val)); + isb(); +} #define modify_domain(dom,type) \ do { \ @@ -78,8 +78,8 @@ } while (0) #else -#define set_domain(x) do { } while (0) -#define modify_domain(dom,type) do { } while (0) +static inline void set_domain(unsigned val) { } +static inline void modify_domain(unsigned dom, unsigned type) { } #endif /* diff --git a/arch/arm/include/asm/futex.h b/arch/arm/include/asm/futex.h index 7be54690aeec..e42cf597f6e6 100644 --- a/arch/arm/include/asm/futex.h +++ b/arch/arm/include/asm/futex.h @@ -19,6 +19,7 @@ " .long 1b, 4f, 2b, 4f\n" \ " .popsection\n" \ " .pushsection .fixup,\"ax\"\n" \ + " .align 2\n" \ "4: mov %0, " err_reg "\n" \ " b 3b\n" \ " .popsection" diff --git a/arch/arm/include/asm/hardware/sp810.h b/arch/arm/include/asm/hardware/sp810.h index e0d1c0cfa548..6b9b077d86b3 100644 --- a/arch/arm/include/asm/hardware/sp810.h +++ b/arch/arm/include/asm/hardware/sp810.h @@ -4,7 +4,7 @@ * ARM PrimeXsys System Controller SP810 header file * * Copyright (C) 2009 ST Microelectronics - * Viresh Kumar<viresh.kumar@st.com> + * Viresh Kumar <viresh.linux@gmail.com> * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any diff --git a/arch/arm/include/asm/kmap_types.h b/arch/arm/include/asm/kmap_types.h index e51b1e81df05..83eb2f772911 100644 --- a/arch/arm/include/asm/kmap_types.h +++ b/arch/arm/include/asm/kmap_types.h @@ -4,30 +4,6 @@ /* * This is the "bare minimum". AIO seems to require this. */ -enum km_type { - KM_BOUNCE_READ, - KM_SKB_SUNRPC_DATA, - KM_SKB_DATA_SOFTIRQ, - KM_USER0, - KM_USER1, - KM_BIO_SRC_IRQ, - KM_BIO_DST_IRQ, - KM_PTE0, - KM_PTE1, - KM_IRQ0, - KM_IRQ1, - KM_SOFTIRQ0, - KM_SOFTIRQ1, - KM_L1_CACHE, - KM_L2_CACHE, - KM_KDB, - KM_TYPE_NR -}; - -#ifdef CONFIG_DEBUG_HIGHMEM -#define KM_NMI (-1) -#define KM_NMI_PTE (-1) -#define KM_IRQ_PTE (-1) -#endif +#define KM_TYPE_NR 16 #endif diff --git a/arch/arm/include/asm/locks.h b/arch/arm/include/asm/locks.h deleted file mode 100644 index ef4c897772d1..000000000000 --- a/arch/arm/include/asm/locks.h +++ /dev/null @@ -1,274 +0,0 @@ -/* - * arch/arm/include/asm/locks.h - * - * Copyright (C) 2000 Russell King - * - * 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. - * - * Interrupt safe locking assembler. - */ -#ifndef __ASM_PROC_LOCKS_H -#define __ASM_PROC_LOCKS_H - -#if __LINUX_ARM_ARCH__ >= 6 - -#define __down_op(ptr,fail) \ - ({ \ - __asm__ __volatile__( \ - "@ down_op\n" \ -"1: ldrex lr, [%0]\n" \ -" sub lr, lr, %1\n" \ -" strex ip, lr, [%0]\n" \ -" teq ip, #0\n" \ -" bne 1b\n" \ -" teq lr, #0\n" \ -" movmi ip, %0\n" \ -" blmi " #fail \ - : \ - : "r" (ptr), "I" (1) \ - : "ip", "lr", "cc"); \ - smp_mb(); \ - }) - -#define __down_op_ret(ptr,fail) \ - ({ \ - unsigned int ret; \ - __asm__ __volatile__( \ - "@ down_op_ret\n" \ -"1: ldrex lr, [%1]\n" \ -" sub lr, lr, %2\n" \ -" strex ip, lr, [%1]\n" \ -" teq ip, #0\n" \ -" bne 1b\n" \ -" teq lr, #0\n" \ -" movmi ip, %1\n" \ -" movpl ip, #0\n" \ -" blmi " #fail "\n" \ -" mov %0, ip" \ - : "=&r" (ret) \ - : "r" (ptr), "I" (1) \ - : "ip", "lr", "cc"); \ - smp_mb(); \ - ret; \ - }) - -#define __up_op(ptr,wake) \ - ({ \ - smp_mb(); \ - __asm__ __volatile__( \ - "@ up_op\n" \ -"1: ldrex lr, [%0]\n" \ -" add lr, lr, %1\n" \ -" strex ip, lr, [%0]\n" \ -" teq ip, #0\n" \ -" bne 1b\n" \ -" cmp lr, #0\n" \ -" movle ip, %0\n" \ -" blle " #wake \ - : \ - : "r" (ptr), "I" (1) \ - : "ip", "lr", "cc"); \ - }) - -/* - * The value 0x01000000 supports up to 128 processors and - * lots of processes. BIAS must be chosen such that sub'ing - * BIAS once per CPU will result in the long remaining - * negative. - */ -#define RW_LOCK_BIAS 0x01000000 -#define RW_LOCK_BIAS_STR "0x01000000" - -#define __down_op_write(ptr,fail) \ - ({ \ - __asm__ __volatile__( \ - "@ down_op_write\n" \ -"1: ldrex lr, [%0]\n" \ -" sub lr, lr, %1\n" \ -" strex ip, lr, [%0]\n" \ -" teq ip, #0\n" \ -" bne 1b\n" \ -" teq lr, #0\n" \ -" movne ip, %0\n" \ -" blne " #fail \ - : \ - : "r" (ptr), "I" (RW_LOCK_BIAS) \ - : "ip", "lr", "cc"); \ - smp_mb(); \ - }) - -#define __up_op_write(ptr,wake) \ - ({ \ - smp_mb(); \ - __asm__ __volatile__( \ - "@ up_op_write\n" \ -"1: ldrex lr, [%0]\n" \ -" adds lr, lr, %1\n" \ -" strex ip, lr, [%0]\n" \ -" teq ip, #0\n" \ -" bne 1b\n" \ -" movcs ip, %0\n" \ -" blcs " #wake \ - : \ - : "r" (ptr), "I" (RW_LOCK_BIAS) \ - : "ip", "lr", "cc"); \ - }) - -#define __down_op_read(ptr,fail) \ - __down_op(ptr, fail) - -#define __up_op_read(ptr,wake) \ - ({ \ - smp_mb(); \ - __asm__ __volatile__( \ - "@ up_op_read\n" \ -"1: ldrex lr, [%0]\n" \ -" add lr, lr, %1\n" \ -" strex ip, lr, [%0]\n" \ -" teq ip, #0\n" \ -" bne 1b\n" \ -" teq lr, #0\n" \ -" moveq ip, %0\n" \ -" bleq " #wake \ - : \ - : "r" (ptr), "I" (1) \ - : "ip", "lr", "cc"); \ - }) - -#else - -#define __down_op(ptr,fail) \ - ({ \ - __asm__ __volatile__( \ - "@ down_op\n" \ -" mrs ip, cpsr\n" \ -" orr lr, ip, #128\n" \ -" msr cpsr_c, lr\n" \ -" ldr lr, [%0]\n" \ -" subs lr, lr, %1\n" \ -" str lr, [%0]\n" \ -" msr cpsr_c, ip\n" \ -" movmi ip, %0\n" \ -" blmi " #fail \ - : \ - : "r" (ptr), "I" (1) \ - : "ip", "lr", "cc"); \ - smp_mb(); \ - }) - -#define __down_op_ret(ptr,fail) \ - ({ \ - unsigned int ret; \ - __asm__ __volatile__( \ - "@ down_op_ret\n" \ -" mrs ip, cpsr\n" \ -" orr lr, ip, #128\n" \ -" msr cpsr_c, lr\n" \ -" ldr lr, [%1]\n" \ -" subs lr, lr, %2\n" \ -" str lr, [%1]\n" \ -" msr cpsr_c, ip\n" \ -" movmi ip, %1\n" \ -" movpl ip, #0\n" \ -" blmi " #fail "\n" \ -" mov %0, ip" \ - : "=&r" (ret) \ - : "r" (ptr), "I" (1) \ - : "ip", "lr", "cc"); \ - smp_mb(); \ - ret; \ - }) - -#define __up_op(ptr,wake) \ - ({ \ - smp_mb(); \ - __asm__ __volatile__( \ - "@ up_op\n" \ -" mrs ip, cpsr\n" \ -" orr lr, ip, #128\n" \ -" msr cpsr_c, lr\n" \ -" ldr lr, [%0]\n" \ -" adds lr, lr, %1\n" \ -" str lr, [%0]\n" \ -" msr cpsr_c, ip\n" \ -" movle ip, %0\n" \ -" blle " #wake \ - : \ - : "r" (ptr), "I" (1) \ - : "ip", "lr", "cc"); \ - }) - -/* - * The value 0x01000000 supports up to 128 processors and - * lots of processes. BIAS must be chosen such that sub'ing - * BIAS once per CPU will result in the long remaining - * negative. - */ -#define RW_LOCK_BIAS 0x01000000 -#define RW_LOCK_BIAS_STR "0x01000000" - -#define __down_op_write(ptr,fail) \ - ({ \ - __asm__ __volatile__( \ - "@ down_op_write\n" \ -" mrs ip, cpsr\n" \ -" orr lr, ip, #128\n" \ -" msr cpsr_c, lr\n" \ -" ldr lr, [%0]\n" \ -" subs lr, lr, %1\n" \ -" str lr, [%0]\n" \ -" msr cpsr_c, ip\n" \ -" movne ip, %0\n" \ -" blne " #fail \ - : \ - : "r" (ptr), "I" (RW_LOCK_BIAS) \ - : "ip", "lr", "cc"); \ - smp_mb(); \ - }) - -#define __up_op_write(ptr,wake) \ - ({ \ - __asm__ __volatile__( \ - "@ up_op_write\n" \ -" mrs ip, cpsr\n" \ -" orr lr, ip, #128\n" \ -" msr cpsr_c, lr\n" \ -" ldr lr, [%0]\n" \ -" adds lr, lr, %1\n" \ -" str lr, [%0]\n" \ -" msr cpsr_c, ip\n" \ -" movcs ip, %0\n" \ -" blcs " #wake \ - : \ - : "r" (ptr), "I" (RW_LOCK_BIAS) \ - : "ip", "lr", "cc"); \ - smp_mb(); \ - }) - -#define __down_op_read(ptr,fail) \ - __down_op(ptr, fail) - -#define __up_op_read(ptr,wake) \ - ({ \ - smp_mb(); \ - __asm__ __volatile__( \ - "@ up_op_read\n" \ -" mrs ip, cpsr\n" \ -" orr lr, ip, #128\n" \ -" msr cpsr_c, lr\n" \ -" ldr lr, [%0]\n" \ -" adds lr, lr, %1\n" \ -" str lr, [%0]\n" \ -" msr cpsr_c, ip\n" \ -" moveq ip, %0\n" \ -" bleq " #wake \ - : \ - : "r" (ptr), "I" (1) \ - : "ip", "lr", "cc"); \ - }) - -#endif - -#endif diff --git a/arch/arm/include/asm/mach/irq.h b/arch/arm/include/asm/mach/irq.h index febe495d0c6e..15cb035309f7 100644 --- a/arch/arm/include/asm/mach/irq.h +++ b/arch/arm/include/asm/mach/irq.h @@ -17,7 +17,7 @@ struct seq_file; /* * This is internal. Do not use it. */ -extern void init_FIQ(void); +extern void init_FIQ(int); extern int show_fiq_list(struct seq_file *, int); #ifdef CONFIG_MULTI_IRQ_HANDLER diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h index fcb575747e5e..e965f1b560f1 100644 --- a/arch/arm/include/asm/memory.h +++ b/arch/arm/include/asm/memory.h @@ -16,7 +16,7 @@ #include <linux/compiler.h> #include <linux/const.h> #include <linux/types.h> -#include <asm/sizes.h> +#include <linux/sizes.h> #ifdef CONFIG_NEED_MACH_MEMORY_H #include <mach/memory.h> diff --git a/arch/arm/include/asm/mutex.h b/arch/arm/include/asm/mutex.h index 93226cf23ae0..b1479fd04a95 100644 --- a/arch/arm/include/asm/mutex.h +++ b/arch/arm/include/asm/mutex.h @@ -7,121 +7,10 @@ */ #ifndef _ASM_MUTEX_H #define _ASM_MUTEX_H - -#if __LINUX_ARM_ARCH__ < 6 -/* On pre-ARMv6 hardware the swp based implementation is the most efficient. */ -# include <asm-generic/mutex-xchg.h> -#else - /* - * Attempting to lock a mutex on ARMv6+ can be done with a bastardized - * atomic decrement (it is not a reliable atomic decrement but it satisfies - * the defined semantics for our purpose, while being smaller and faster - * than a real atomic decrement or atomic swap. The idea is to attempt - * decrementing the lock value only once. If once decremented it isn't zero, - * or if its store-back fails due to a dispute on the exclusive store, we - * simply bail out immediately through the slow path where the lock will be - * reattempted until it succeeds. + * On pre-ARMv6 hardware this results in a swp-based implementation, + * which is the most efficient. For ARMv6+, we emit a pair of exclusive + * accesses instead. */ -static inline void -__mutex_fastpath_lock(atomic_t *count, void (*fail_fn)(atomic_t *)) -{ - int __ex_flag, __res; - - __asm__ ( - - "ldrex %0, [%2] \n\t" - "sub %0, %0, #1 \n\t" - "strex %1, %0, [%2] " - - : "=&r" (__res), "=&r" (__ex_flag) - : "r" (&(count)->counter) - : "cc","memory" ); - - __res |= __ex_flag; - if (unlikely(__res != 0)) - fail_fn(count); -} - -static inline int -__mutex_fastpath_lock_retval(atomic_t *count, int (*fail_fn)(atomic_t *)) -{ - int __ex_flag, __res; - - __asm__ ( - - "ldrex %0, [%2] \n\t" - "sub %0, %0, #1 \n\t" - "strex %1, %0, [%2] " - - : "=&r" (__res), "=&r" (__ex_flag) - : "r" (&(count)->counter) - : "cc","memory" ); - - __res |= __ex_flag; - if (unlikely(__res != 0)) - __res = fail_fn(count); - return __res; -} - -/* - * Same trick is used for the unlock fast path. However the original value, - * rather than the result, is used to test for success in order to have - * better generated assembly. - */ -static inline void -__mutex_fastpath_unlock(atomic_t *count, void (*fail_fn)(atomic_t *)) -{ - int __ex_flag, __res, __orig; - - __asm__ ( - - "ldrex %0, [%3] \n\t" - "add %1, %0, #1 \n\t" - "strex %2, %1, [%3] " - - : "=&r" (__orig), "=&r" (__res), "=&r" (__ex_flag) - : "r" (&(count)->counter) - : "cc","memory" ); - - __orig |= __ex_flag; - if (unlikely(__orig != 0)) - fail_fn(count); -} - -/* - * If the unlock was done on a contended lock, or if the unlock simply fails - * then the mutex remains locked. - */ -#define __mutex_slowpath_needs_to_unlock() 1 - -/* - * For __mutex_fastpath_trylock we use another construct which could be - * described as a "single value cmpxchg". - * - * This provides the needed trylock semantics like cmpxchg would, but it is - * lighter and less generic than a true cmpxchg implementation. - */ -static inline int -__mutex_fastpath_trylock(atomic_t *count, int (*fail_fn)(atomic_t *)) -{ - int __ex_flag, __res, __orig; - - __asm__ ( - - "1: ldrex %0, [%3] \n\t" - "subs %1, %0, #1 \n\t" - "strexeq %2, %1, [%3] \n\t" - "movlt %0, #0 \n\t" - "cmpeq %2, #0 \n\t" - "bgt 1b " - - : "=&r" (__orig), "=&r" (__res), "=&r" (__ex_flag) - : "r" (&count->counter) - : "cc", "memory" ); - - return __orig; -} - -#endif +#include <asm-generic/mutex-xchg.h> #endif diff --git a/arch/arm/include/asm/perf_event.h b/arch/arm/include/asm/perf_event.h index 00cbe10a50e3..e074948d8143 100644 --- a/arch/arm/include/asm/perf_event.h +++ b/arch/arm/include/asm/perf_event.h @@ -12,21 +12,6 @@ #ifndef __ARM_PERF_EVENT_H__ #define __ARM_PERF_EVENT_H__ -/* ARM perf PMU IDs for use by internal perf clients. */ -enum arm_perf_pmu_ids { - ARM_PERF_PMU_ID_XSCALE1 = 0, - ARM_PERF_PMU_ID_XSCALE2, - ARM_PERF_PMU_ID_V6, - ARM_PERF_PMU_ID_V6MP, - ARM_PERF_PMU_ID_CA8, - ARM_PERF_PMU_ID_CA9, - ARM_PERF_PMU_ID_CA5, - ARM_PERF_PMU_ID_CA15, - ARM_PERF_PMU_ID_CA7, - ARM_NUM_PMU_IDS, -}; - -extern enum arm_perf_pmu_ids -armpmu_get_pmu_id(void); +/* Nothing to see here... */ #endif /* __ARM_PERF_EVENT_H__ */ diff --git a/arch/arm/include/asm/pmu.h b/arch/arm/include/asm/pmu.h index 90114faa9f3c..4432305f4a2a 100644 --- a/arch/arm/include/asm/pmu.h +++ b/arch/arm/include/asm/pmu.h @@ -103,10 +103,9 @@ struct pmu_hw_events { struct arm_pmu { struct pmu pmu; - enum arm_perf_pmu_ids id; enum arm_pmu_type type; cpumask_t active_irqs; - const char *name; + char *name; irqreturn_t (*handle_irq)(int irq_num, void *dev); void (*enable)(struct hw_perf_event *evt, int idx); void (*disable)(struct hw_perf_event *evt, int idx); diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h index 23ebc0c82a39..24d284a1bfc7 100644 --- a/arch/arm/include/asm/setup.h +++ b/arch/arm/include/asm/setup.h @@ -196,7 +196,7 @@ static const struct tagtable __tagtable_##fn __tag = { tag, fn } struct membank { phys_addr_t start; - unsigned long size; + phys_addr_t size; unsigned int highmem; }; @@ -217,7 +217,7 @@ extern struct meminfo meminfo; #define bank_phys_end(bank) ((bank)->start + (bank)->size) #define bank_phys_size(bank) (bank)->size -extern int arm_add_memory(phys_addr_t start, unsigned long size); +extern int arm_add_memory(phys_addr_t start, phys_addr_t size); extern void early_print(const char *str, ...); extern void dump_machine_table(void); diff --git a/arch/arm/include/asm/spinlock.h b/arch/arm/include/asm/spinlock.h index 65fa3c88095c..b4ca707d0a69 100644 --- a/arch/arm/include/asm/spinlock.h +++ b/arch/arm/include/asm/spinlock.h @@ -59,18 +59,13 @@ static inline void dsb_sev(void) } /* - * ARMv6 Spin-locking. + * ARMv6 ticket-based spin-locking. * - * We exclusively read the old value. If it is zero, we may have - * won the lock, so we try exclusively storing it. A memory barrier - * is required after we get a lock, and before we release it, because - * V6 CPUs are assumed to have weakly ordered memory. - * - * Unlocked value: 0 - * Locked value: 1 + * A memory barrier is required after we get a lock, and before we + * release it, because V6 CPUs are assumed to have weakly ordered + * memory. */ -#define arch_spin_is_locked(x) ((x)->lock != 0) #define arch_spin_unlock_wait(lock) \ do { while (arch_spin_is_locked(lock)) cpu_relax(); } while (0) @@ -79,31 +74,39 @@ static inline void dsb_sev(void) static inline void arch_spin_lock(arch_spinlock_t *lock) { unsigned long tmp; + u32 newval; + arch_spinlock_t lockval; __asm__ __volatile__( -"1: ldrex %0, [%1]\n" -" teq %0, #0\n" - WFE("ne") -" strexeq %0, %2, [%1]\n" -" teqeq %0, #0\n" +"1: ldrex %0, [%3]\n" +" add %1, %0, %4\n" +" strex %2, %1, [%3]\n" +" teq %2, #0\n" " bne 1b" - : "=&r" (tmp) - : "r" (&lock->lock), "r" (1) + : "=&r" (lockval), "=&r" (newval), "=&r" (tmp) + : "r" (&lock->slock), "I" (1 << TICKET_SHIFT) : "cc"); + while (lockval.tickets.next != lockval.tickets.owner) { + wfe(); + lockval.tickets.owner = ACCESS_ONCE(lock->tickets.owner); + } + smp_mb(); } static inline int arch_spin_trylock(arch_spinlock_t *lock) { unsigned long tmp; + u32 slock; __asm__ __volatile__( -" ldrex %0, [%1]\n" -" teq %0, #0\n" -" strexeq %0, %2, [%1]" - : "=&r" (tmp) - : "r" (&lock->lock), "r" (1) +" ldrex %0, [%2]\n" +" subs %1, %0, %0, ror #16\n" +" addeq %0, %0, %3\n" +" strexeq %1, %0, [%2]" + : "=&r" (slock), "=&r" (tmp) + : "r" (&lock->slock), "I" (1 << TICKET_SHIFT) : "cc"); if (tmp == 0) { @@ -116,17 +119,38 @@ static inline int arch_spin_trylock(arch_spinlock_t *lock) static inline void arch_spin_unlock(arch_spinlock_t *lock) { + unsigned long tmp; + u32 slock; + smp_mb(); __asm__ __volatile__( -" str %1, [%0]\n" - : - : "r" (&lock->lock), "r" (0) +" mov %1, #1\n" +"1: ldrex %0, [%2]\n" +" uadd16 %0, %0, %1\n" +" strex %1, %0, [%2]\n" +" teq %1, #0\n" +" bne 1b" + : "=&r" (slock), "=&r" (tmp) + : "r" (&lock->slock) : "cc"); dsb_sev(); } +static inline int arch_spin_is_locked(arch_spinlock_t *lock) +{ + struct __raw_tickets tickets = ACCESS_ONCE(lock->tickets); + return tickets.owner != tickets.next; +} + +static inline int arch_spin_is_contended(arch_spinlock_t *lock) +{ + struct __raw_tickets tickets = ACCESS_ONCE(lock->tickets); + return (tickets.next - tickets.owner) > 1; +} +#define arch_spin_is_contended arch_spin_is_contended + /* * RWLOCKS * @@ -158,7 +182,7 @@ static inline int arch_write_trylock(arch_rwlock_t *rw) unsigned long tmp; __asm__ __volatile__( -"1: ldrex %0, [%1]\n" +" ldrex %0, [%1]\n" " teq %0, #0\n" " strexeq %0, %2, [%1]" : "=&r" (tmp) @@ -244,7 +268,7 @@ static inline int arch_read_trylock(arch_rwlock_t *rw) unsigned long tmp, tmp2 = 1; __asm__ __volatile__( -"1: ldrex %0, [%2]\n" +" ldrex %0, [%2]\n" " adds %0, %0, #1\n" " strexpl %1, %0, [%2]\n" : "=&r" (tmp), "+r" (tmp2) diff --git a/arch/arm/include/asm/spinlock_types.h b/arch/arm/include/asm/spinlock_types.h index d14d197ae04a..b262d2f8b478 100644 --- a/arch/arm/include/asm/spinlock_types.h +++ b/arch/arm/include/asm/spinlock_types.h @@ -5,11 +5,24 @@ # error "please don't include this file directly" #endif +#define TICKET_SHIFT 16 + typedef struct { - volatile unsigned int lock; + union { + u32 slock; + struct __raw_tickets { +#ifdef __ARMEB__ + u16 next; + u16 owner; +#else + u16 owner; + u16 next; +#endif + } tickets; + }; } arch_spinlock_t; -#define __ARCH_SPIN_LOCK_UNLOCKED { 0 } +#define __ARCH_SPIN_LOCK_UNLOCKED { { 0 } } typedef struct { volatile unsigned int lock; diff --git a/arch/arm/include/asm/thread_info.h b/arch/arm/include/asm/thread_info.h index b79f8e97f775..af7b0bda3355 100644 --- a/arch/arm/include/asm/thread_info.h +++ b/arch/arm/include/asm/thread_info.h @@ -148,7 +148,6 @@ extern int vfp_restore_user_hwstate(struct user_vfp __user *, #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ #define TIF_SYSCALL_TRACE 8 #define TIF_SYSCALL_AUDIT 9 -#define TIF_SYSCALL_RESTARTSYS 10 #define TIF_POLLING_NRFLAG 16 #define TIF_USING_IWMMXT 17 #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ @@ -164,11 +163,9 @@ extern int vfp_restore_user_hwstate(struct user_vfp __user *, #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) #define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT) #define _TIF_SECCOMP (1 << TIF_SECCOMP) -#define _TIF_SYSCALL_RESTARTSYS (1 << TIF_SYSCALL_RESTARTSYS) /* Checks for any syscall work in entry-common.S */ -#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ - _TIF_SYSCALL_RESTARTSYS) +#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT) /* * Change these and you break ASM code in entry-common.S diff --git a/arch/arm/include/asm/timex.h b/arch/arm/include/asm/timex.h index 3be8de3adaba..ce119442277c 100644 --- a/arch/arm/include/asm/timex.h +++ b/arch/arm/include/asm/timex.h @@ -12,13 +12,15 @@ #ifndef _ASMARM_TIMEX_H #define _ASMARM_TIMEX_H +#include <asm/arch_timer.h> #include <mach/timex.h> typedef unsigned long cycles_t; -static inline cycles_t get_cycles (void) -{ - return 0; -} +#ifdef ARCH_HAS_READ_CURRENT_TIMER +#define get_cycles() ({ cycles_t c; read_current_timer(&c) ? 0 : c; }) +#else +#define get_cycles() (0) +#endif #endif diff --git a/arch/arm/include/asm/uaccess.h b/arch/arm/include/asm/uaccess.h index 71f6536d17ac..479a6352e0b5 100644 --- a/arch/arm/include/asm/uaccess.h +++ b/arch/arm/include/asm/uaccess.h @@ -189,6 +189,9 @@ static inline void set_fs(mm_segment_t fs) #define access_ok(type,addr,size) (__range_ok(addr,size) == 0) +#define user_addr_max() \ + (segment_eq(get_fs(), USER_DS) ? TASK_SIZE : ~0UL) + /* * The "__xxx" versions of the user access functions do not verify the * address space - it must have been done previously with a separate @@ -398,9 +401,6 @@ extern unsigned long __must_check __clear_user_std(void __user *addr, unsigned l #define __clear_user(addr,n) (memset((void __force *)addr, 0, n), 0) #endif -extern unsigned long __must_check __strncpy_from_user(char *to, const char __user *from, unsigned long count); -extern unsigned long __must_check __strnlen_user(const char __user *s, long n); - static inline unsigned long __must_check copy_from_user(void *to, const void __user *from, unsigned long n) { if (access_ok(VERIFY_READ, from, n)) @@ -427,24 +427,9 @@ static inline unsigned long __must_check clear_user(void __user *to, unsigned lo return n; } -static inline long __must_check strncpy_from_user(char *dst, const char __user *src, long count) -{ - long res = -EFAULT; - if (access_ok(VERIFY_READ, src, 1)) - res = __strncpy_from_user(dst, src, count); - return res; -} - -#define strlen_user(s) strnlen_user(s, ~0UL >> 1) +extern long strncpy_from_user(char *dest, const char __user *src, long count); -static inline long __must_check strnlen_user(const char __user *s, long n) -{ - unsigned long res = 0; - - if (__addr_ok(s)) - res = __strnlen_user(s, n); - - return res; -} +extern __must_check long strlen_user(const char __user *str); +extern __must_check long strnlen_user(const char __user *str, long n); #endif /* _ASMARM_UACCESS_H */ diff --git a/arch/arm/include/asm/unistd.h b/arch/arm/include/asm/unistd.h index 512cd1473454..0cab47d4a83f 100644 --- a/arch/arm/include/asm/unistd.h +++ b/arch/arm/include/asm/unistd.h @@ -446,7 +446,6 @@ #ifdef __KERNEL__ -#define __ARCH_WANT_IPC_PARSE_VERSION #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SYS_GETHOSTNAME #define __ARCH_WANT_SYS_PAUSE diff --git a/arch/arm/include/asm/word-at-a-time.h b/arch/arm/include/asm/word-at-a-time.h new file mode 100644 index 000000000000..4d52f92967a6 --- /dev/null +++ b/arch/arm/include/asm/word-at-a-time.h @@ -0,0 +1,96 @@ +#ifndef __ASM_ARM_WORD_AT_A_TIME_H +#define __ASM_ARM_WORD_AT_A_TIME_H + +#ifndef __ARMEB__ + +/* + * Little-endian word-at-a-time zero byte handling. + * Heavily based on the x86 algorithm. + */ +#include <linux/kernel.h> + +struct word_at_a_time { + const unsigned long one_bits, high_bits; +}; + +#define WORD_AT_A_TIME_CONSTANTS { REPEAT_BYTE(0x01), REPEAT_BYTE(0x80) } + +static inline unsigned long has_zero(unsigned long a, unsigned long *bits, + const struct word_at_a_time *c) +{ + unsigned long mask = ((a - c->one_bits) & ~a) & c->high_bits; + *bits = mask; + return mask; +} + +#define prep_zero_mask(a, bits, c) (bits) + +static inline unsigned long create_zero_mask(unsigned long bits) +{ + bits = (bits - 1) & ~bits; + return bits >> 7; +} + +static inline unsigned long find_zero(unsigned long mask) +{ + unsigned long ret; + +#if __LINUX_ARM_ARCH__ >= 5 + /* We have clz available. */ + ret = fls(mask) >> 3; +#else + /* (000000 0000ff 00ffff ffffff) -> ( 1 1 2 3 ) */ + ret = (0x0ff0001 + mask) >> 23; + /* Fix the 1 for 00 case */ + ret &= mask; +#endif + + return ret; +} + +#ifdef CONFIG_DCACHE_WORD_ACCESS + +#define zero_bytemask(mask) (mask) + +/* + * Load an unaligned word from kernel space. + * + * In the (very unlikely) case of the word being a page-crosser + * and the next page not being mapped, take the exception and + * return zeroes in the non-existing part. + */ +static inline unsigned long load_unaligned_zeropad(const void *addr) +{ + unsigned long ret, offset; + + /* Load word from unaligned pointer addr */ + asm( + "1: ldr %0, [%2]\n" + "2:\n" + " .pushsection .fixup,\"ax\"\n" + " .align 2\n" + "3: and %1, %2, #0x3\n" + " bic %2, %2, #0x3\n" + " ldr %0, [%2]\n" + " lsl %1, %1, #0x3\n" + " lsr %0, %0, %1\n" + " b 2b\n" + " .popsection\n" + " .pushsection __ex_table,\"a\"\n" + " .align 3\n" + " .long 1b, 3b\n" + " .popsection" + : "=&r" (ret), "=&r" (offset) + : "r" (addr), "Qo" (*(unsigned long *)addr)); + + return ret; +} + + +#endif /* DCACHE_WORD_ACCESS */ + +#else /* __ARMEB__ */ +#include <asm-generic/word-at-a-time.h> +#endif + +#endif /* __ASM_ARM_WORD_AT_A_TIME_H */ |
