diff options
Diffstat (limited to 'include/asm-sparc64/atomic.h')
-rw-r--r-- | include/asm-sparc64/atomic.h | 129 |
1 files changed, 1 insertions, 128 deletions
diff --git a/include/asm-sparc64/atomic.h b/include/asm-sparc64/atomic.h index 2c71ec4a3b1..f5126826ba3 100644 --- a/include/asm-sparc64/atomic.h +++ b/include/asm-sparc64/atomic.h @@ -1,128 +1 @@ -/* atomic.h: Thankfully the V9 is at least reasonable for this - * stuff. - * - * Copyright (C) 1996, 1997, 2000 David S. Miller (davem@redhat.com) - */ - -#ifndef __ARCH_SPARC64_ATOMIC__ -#define __ARCH_SPARC64_ATOMIC__ - -#include <linux/types.h> -#include <asm/system.h> - -typedef struct { volatile int counter; } atomic_t; -typedef struct { volatile __s64 counter; } atomic64_t; - -#define ATOMIC_INIT(i) { (i) } -#define ATOMIC64_INIT(i) { (i) } - -#define atomic_read(v) ((v)->counter) -#define atomic64_read(v) ((v)->counter) - -#define atomic_set(v, i) (((v)->counter) = i) -#define atomic64_set(v, i) (((v)->counter) = i) - -extern void atomic_add(int, atomic_t *); -extern void atomic64_add(int, atomic64_t *); -extern void atomic_sub(int, atomic_t *); -extern void atomic64_sub(int, atomic64_t *); - -extern int atomic_add_ret(int, atomic_t *); -extern int atomic64_add_ret(int, atomic64_t *); -extern int atomic_sub_ret(int, atomic_t *); -extern int atomic64_sub_ret(int, atomic64_t *); - -#define atomic_dec_return(v) atomic_sub_ret(1, v) -#define atomic64_dec_return(v) atomic64_sub_ret(1, v) - -#define atomic_inc_return(v) atomic_add_ret(1, v) -#define atomic64_inc_return(v) atomic64_add_ret(1, v) - -#define atomic_sub_return(i, v) atomic_sub_ret(i, v) -#define atomic64_sub_return(i, v) atomic64_sub_ret(i, v) - -#define atomic_add_return(i, v) atomic_add_ret(i, v) -#define atomic64_add_return(i, v) atomic64_add_ret(i, v) - -/* - * atomic_inc_and_test - increment and test - * @v: pointer of type atomic_t - * - * Atomically increments @v by 1 - * and returns true if the result is zero, or false for all - * other cases. - */ -#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0) -#define atomic64_inc_and_test(v) (atomic64_inc_return(v) == 0) - -#define atomic_sub_and_test(i, v) (atomic_sub_ret(i, v) == 0) -#define atomic64_sub_and_test(i, v) (atomic64_sub_ret(i, v) == 0) - -#define atomic_dec_and_test(v) (atomic_sub_ret(1, v) == 0) -#define atomic64_dec_and_test(v) (atomic64_sub_ret(1, v) == 0) - -#define atomic_inc(v) atomic_add(1, v) -#define atomic64_inc(v) atomic64_add(1, v) - -#define atomic_dec(v) atomic_sub(1, v) -#define atomic64_dec(v) atomic64_sub(1, v) - -#define atomic_add_negative(i, v) (atomic_add_ret(i, v) < 0) -#define atomic64_add_negative(i, v) (atomic64_add_ret(i, v) < 0) - -#define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n))) -#define atomic_xchg(v, new) (xchg(&((v)->counter), new)) - -static inline int atomic_add_unless(atomic_t *v, int a, int u) -{ - int c, old; - c = atomic_read(v); - for (;;) { - if (unlikely(c == (u))) - break; - old = atomic_cmpxchg((v), c, c + (a)); - if (likely(old == c)) - break; - c = old; - } - return c != (u); -} - -#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) - -#define atomic64_cmpxchg(v, o, n) \ - ((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n))) -#define atomic64_xchg(v, new) (xchg(&((v)->counter), new)) - -static inline int atomic64_add_unless(atomic64_t *v, long a, long u) -{ - long c, old; - c = atomic64_read(v); - for (;;) { - if (unlikely(c == (u))) - break; - old = atomic64_cmpxchg((v), c, c + (a)); - if (likely(old == c)) - break; - c = old; - } - return c != (u); -} - -#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0) - -/* Atomic operations are already serializing */ -#ifdef CONFIG_SMP -#define smp_mb__before_atomic_dec() membar_storeload_loadload(); -#define smp_mb__after_atomic_dec() membar_storeload_storestore(); -#define smp_mb__before_atomic_inc() membar_storeload_loadload(); -#define smp_mb__after_atomic_inc() membar_storeload_storestore(); -#else -#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 - -#include <asm-generic/atomic.h> -#endif /* !(__ARCH_SPARC64_ATOMIC__) */ +#include <asm-sparc/atomic.h> |