diff options
Diffstat (limited to 'include/asm-blackfin/atomic.h')
-rw-r--r-- | include/asm-blackfin/atomic.h | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/include/asm-blackfin/atomic.h b/include/asm-blackfin/atomic.h deleted file mode 100644 index 7cf5087..0000000 --- a/include/asm-blackfin/atomic.h +++ /dev/null @@ -1,144 +0,0 @@ -#ifndef __ARCH_BLACKFIN_ATOMIC__ -#define __ARCH_BLACKFIN_ATOMIC__ - -#include <asm/system.h> /* local_irq_XXX() */ - -/* - * Atomic operations that C can't guarantee us. Useful for - * resource counting etc.. - * - * Generally we do not concern about SMP BFIN systems, so we don't have - * to deal with that. - * - * Tony Kou (tonyko@lineo.ca) Lineo Inc. 2001 - */ - -typedef struct { - int counter; -} atomic_t; -#define ATOMIC_INIT(i) { (i) } - -#define atomic_read(v) ((v)->counter) -#define atomic_set(v, i) (((v)->counter) = i) - -static __inline__ void atomic_add(int i, atomic_t * v) -{ - long flags; - - local_irq_save(flags); - v->counter += i; - local_irq_restore(flags); -} - -static __inline__ void atomic_sub(int i, atomic_t * v) -{ - long flags; - - local_irq_save(flags); - v->counter -= i; - local_irq_restore(flags); - -} - -static inline int atomic_add_return(int i, atomic_t * v) -{ - int __temp = 0; - long flags; - - local_irq_save(flags); - v->counter += i; - __temp = v->counter; - local_irq_restore(flags); - - - return __temp; -} - -#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0) -static inline int atomic_sub_return(int i, atomic_t * v) -{ - int __temp = 0; - long flags; - - local_irq_save(flags); - v->counter -= i; - __temp = v->counter; - local_irq_restore(flags); - - return __temp; -} - -static __inline__ void atomic_inc(volatile atomic_t * v) -{ - long flags; - - local_irq_save(flags); - v->counter++; - local_irq_restore(flags); -} - -#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) - -static __inline__ void atomic_dec(volatile atomic_t * v) -{ - long flags; - - local_irq_save(flags); - v->counter--; - local_irq_restore(flags); -} - -static __inline__ void atomic_clear_mask(unsigned int mask, atomic_t * v) -{ - long flags; - - local_irq_save(flags); - v->counter &= ~mask; - local_irq_restore(flags); -} - -static __inline__ void atomic_set_mask(unsigned int mask, atomic_t * v) -{ - long flags; - - local_irq_save(flags); - v->counter |= mask; - local_irq_restore(flags); -} - -/* 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_dec_return(v) atomic_sub_return(1,(v)) -#define atomic_inc_return(v) atomic_add_return(1,(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 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.h> - -#endif /* __ARCH_BLACKFIN_ATOMIC __ */ |