diff options
Diffstat (limited to 'arch/ppc/atomic.h')
-rw-r--r-- | arch/ppc/atomic.h | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/arch/ppc/atomic.h b/arch/ppc/atomic.h deleted file mode 100644 index af397599..00000000 --- a/arch/ppc/atomic.h +++ /dev/null @@ -1,124 +0,0 @@ -#ifndef _INTERNAL_ATOMIC_H -#define _INTERNAL_ATOMIC_H - -#include <stdint.h> -#include <endian.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); -} - -static inline int a_cas(volatile int *p, int t, int s) -{ - - __asm__( "1: lwarx 10, 0, %1\n" - " stwcx. %3, 0, %1\n" - " bne- 1b\n" - " mr %0, 10\n" - : "=r"(t) : "r"(p), "r"(t), "r"(s) : "memory" ); - return t; -} - -static inline void *a_cas_p(volatile void *p, void *t, void *s) -{ - return (void *)a_cas(p, (int)t, (int)s); -} - -static inline long a_cas_l(volatile void *p, long t, long s) -{ - return a_cas(p, t, s); -} - - -static inline int a_swap(volatile int *x, int v) -{ - int old; - do old = *x; - while (a_cas(x, old, v) != old); - return old; -} - -static inline int a_fetch_add(volatile int *x, int v) -{ - int old; - do old = *x; - while (a_cas(x, old, old+v) != old); - 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) -{ - *p=x; -} - -static inline void a_spin() -{ -} - -static inline void a_crash() -{ - *(volatile char *)0=0; -} - -static inline void a_and(volatile int *p, int v) -{ - int old; - do old = *p; - while (a_cas(p, old, old&v) != old); -} - -static inline void a_or(volatile int *p, int v) -{ - int old; - do old = *p; - while (a_cas(p, old, old|v) != old); -} - -static inline void a_and_64(volatile uint64_t *p, uint64_t v) -{ -#if __BYTE_ORDER == __LITTLE_ENDIAN - a_and((int *)p, v); - a_and((int *)p+1, v>>32); -#else - a_and((int *)p+1, v); - a_and((int *)p, v>>32); -#endif -} - -static inline void a_or_64(volatile uint64_t *p, uint64_t v) -{ -#if __BYTE_ORDER == __LITTLE_ENDIAN - a_or((int *)p, v); - a_or((int *)p+1, v>>32); -#else - a_or((int *)p+1, v); - a_or((int *)p, v>>32); -#endif -} - -#endif |