| /* |
| * Copyright 2004-2009 Analog Devices Inc. |
| * |
| * Licensed under the GPL-2 or later. |
| */ |
| |
| #ifndef __ARCH_BLACKFIN_ATOMIC__ |
| #define __ARCH_BLACKFIN_ATOMIC__ |
| |
| #ifndef CONFIG_SMP |
| # include <asm-generic/atomic.h> |
| #else |
| |
| #include <linux/types.h> |
| #include <asm/system.h> /* local_irq_XXX() */ |
| |
| /* |
| * Atomic operations that C can't guarantee us. Useful for |
| * resource counting etc.. |
| */ |
| |
| #define ATOMIC_INIT(i) { (i) } |
| #define atomic_set(v, i) (((v)->counter) = i) |
| |
| #define atomic_read(v) __raw_uncached_fetch_asm(&(v)->counter) |
| |
| asmlinkage int __raw_uncached_fetch_asm(const volatile int *ptr); |
| |
| asmlinkage int __raw_atomic_update_asm(volatile int *ptr, int value); |
| |
| asmlinkage int __raw_atomic_clear_asm(volatile int *ptr, int value); |
| |
| asmlinkage int __raw_atomic_set_asm(volatile int *ptr, int value); |
| |
| asmlinkage int __raw_atomic_xor_asm(volatile int *ptr, int value); |
| |
| asmlinkage int __raw_atomic_test_asm(const volatile int *ptr, int value); |
| |
| static inline void atomic_add(int i, atomic_t *v) |
| { |
| __raw_atomic_update_asm(&v->counter, i); |
| } |
| |
| static inline void atomic_sub(int i, atomic_t *v) |
| { |
| __raw_atomic_update_asm(&v->counter, -i); |
| } |
| |
| static inline int atomic_add_return(int i, atomic_t *v) |
| { |
| return __raw_atomic_update_asm(&v->counter, i); |
| } |
| |
| static inline int atomic_sub_return(int i, atomic_t *v) |
| { |
| return __raw_atomic_update_asm(&v->counter, -i); |
| } |
| |
| static inline void atomic_inc(volatile atomic_t *v) |
| { |
| __raw_atomic_update_asm(&v->counter, 1); |
| } |
| |
| static inline void atomic_dec(volatile atomic_t *v) |
| { |
| __raw_atomic_update_asm(&v->counter, -1); |
| } |
| |
| static inline void atomic_clear_mask(int mask, atomic_t *v) |
| { |
| __raw_atomic_clear_asm(&v->counter, mask); |
| } |
| |
| static inline void atomic_set_mask(int mask, atomic_t *v) |
| { |
| __raw_atomic_set_asm(&v->counter, mask); |
| } |
| |
| static inline int atomic_test_mask(int mask, atomic_t *v) |
| { |
| return __raw_atomic_test_asm(&v->counter, mask); |
| } |
| |
| /* Atomic operations are already serializing */ |
| #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() |
| |
| #define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0) |
| #define atomic_dec_return(v) atomic_sub_return(1,(v)) |
| #define atomic_inc_return(v) atomic_add_return(1,(v)) |
| |
| #define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n))) |
| #define atomic_xchg(v, new) (xchg(&((v)->counter), new)) |
| |
| #define atomic_add_unless(v, a, u) \ |
| ({ \ |
| int c, old; \ |
| c = atomic_read(v); \ |
| while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \ |
| c = old; \ |
| c != (u); \ |
| }) |
| #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) |
| |
| /* |
| * 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 atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0) |
| #define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0) |
| |
| #include <asm-generic/atomic-long.h> |
| |
| #endif |
| |
| #include <asm-generic/atomic64.h> |
| |
| #endif |