diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/atomic_arch.h (renamed from arch/arm/atomic.h) | 115 |
1 files changed, 11 insertions, 104 deletions
diff --git a/arch/arm/atomic.h b/arch/arm/atomic_arch.h index 8ae35bb7..5ab20a55 100644 --- a/arch/arm/atomic.h +++ b/arch/arm/atomic_arch.h @@ -1,34 +1,12 @@ -#ifndef _INTERNAL_ATOMIC_H -#define _INTERNAL_ATOMIC_H - -#include <stdint.h> - -static inline int a_ctz_l(unsigned long x) -{ - static const char debruijn32[32] = { - 0, 1, 23, 2, 29, 24, 19, 3, 30, 27, 25, 11, 20, 8, 4, 13, - 31, 22, 28, 18, 26, 10, 7, 12, 21, 17, 9, 6, 16, 5, 15, 14 - }; - return debruijn32[(x&-x)*0x076be629 >> 27]; -} - -static inline int a_ctz_64(uint64_t x) -{ - uint32_t y = x; - if (!y) { - y = x>>32; - return 32 + a_ctz_l(y); - } - return a_ctz_l(y); -} - #if __ARM_ARCH_7A__ || __ARM_ARCH_7R__ || __ARM_ARCH >= 7 +#define a_barrier a_barrier static inline void a_barrier() { __asm__ __volatile__("dmb ish"); } +#define a_cas a_cas static inline int a_cas(volatile int *p, int t, int s) { int old; @@ -48,6 +26,7 @@ static inline int a_cas(volatile int *p, int t, int s) return old; } +#define a_swap a_swap static inline int a_swap(volatile int *x, int v) { int old, tmp; @@ -64,6 +43,7 @@ static inline int a_swap(volatile int *x, int v) return old; } +#define a_fetch_add a_fetch_add static inline int a_fetch_add(volatile int *x, int v) { int old, tmp; @@ -81,6 +61,7 @@ static inline int a_fetch_add(volatile int *x, int v) return old-v; } +#define a_inc a_inc static inline void a_inc(volatile int *x) { int tmp, tmp2; @@ -97,6 +78,7 @@ static inline void a_inc(volatile int *x) : "memory", "cc" ); } +#define a_dec a_dec static inline void a_dec(volatile int *x) { int tmp, tmp2; @@ -113,6 +95,7 @@ static inline void a_dec(volatile int *x) : "memory", "cc" ); } +#define a_and a_and static inline void a_and(volatile int *x, int v) { int tmp, tmp2; @@ -129,6 +112,7 @@ static inline void a_and(volatile int *x, int v) : "memory", "cc" ); } +#define a_or a_or static inline void a_or(volatile int *x, int v) { int tmp, tmp2; @@ -145,6 +129,7 @@ static inline void a_or(volatile int *x, int v) : "memory", "cc" ); } +#define a_store a_store static inline void a_store(volatile int *p, int x) { __asm__ __volatile__( @@ -161,12 +146,14 @@ static inline void a_store(volatile int *p, int x) int __a_cas(int, int, volatile int *) __attribute__((__visibility__("hidden"))); #define __k_cas __a_cas +#define a_barrier a_barrier static inline void a_barrier() { __asm__ __volatile__("bl __a_barrier" : : : "memory", "cc", "ip", "lr" ); } +#define a_cas a_cas static inline int a_cas(volatile int *p, int t, int s) { int old; @@ -178,84 +165,4 @@ static inline int a_cas(volatile int *p, int t, int s) } } -static inline int a_swap(volatile int *x, int v) -{ - int old; - do old = *x; - while (__k_cas(old, v, x)); - return old; -} - -static inline int a_fetch_add(volatile int *x, int v) -{ - int old; - do old = *x; - while (__k_cas(old, old+v, x)); - return old; -} - -static inline void a_inc(volatile int *x) -{ - a_fetch_add(x, 1); -} - -static inline void a_dec(volatile int *x) -{ - a_fetch_add(x, -1); -} - -static inline void a_store(volatile int *p, int x) -{ - a_barrier(); - *p = x; - a_barrier(); -} - -static inline void a_and(volatile int *p, int v) -{ - int old; - do old = *p; - while (__k_cas(old, old&v, p)); -} - -static inline void a_or(volatile int *p, int v) -{ - int old; - do old = *p; - while (__k_cas(old, old|v, p)); -} - -#endif - -static inline void *a_cas_p(volatile void *p, void *t, void *s) -{ - return (void *)a_cas(p, (int)t, (int)s); -} - -#define a_spin a_barrier - -static inline void a_crash() -{ - *(volatile char *)0=0; -} - -static inline void a_or_l(volatile void *p, long v) -{ - a_or(p, v); -} - -static inline void a_and_64(volatile uint64_t *p, uint64_t v) -{ - union { uint64_t v; uint32_t r[2]; } u = { v }; - a_and((int *)p, u.r[0]); - a_and((int *)p+1, u.r[1]); -} - -static inline void a_or_64(volatile uint64_t *p, uint64_t v) -{ - union { uint64_t v; uint32_t r[2]; } u = { v }; - a_or((int *)p, u.r[0]); - a_or((int *)p+1, u.r[1]); -} - #endif |