diff options
Diffstat (limited to 'include/asm-sh/atomic.h')
| -rw-r--r-- | include/asm-sh/atomic.h | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/include/asm-sh/atomic.h b/include/asm-sh/atomic.h deleted file mode 100644 index 3c4f805da1a..00000000000 --- a/include/asm-sh/atomic.h +++ /dev/null @@ -1,114 +0,0 @@ -#ifndef __ASM_SH_ATOMIC_H -#define __ASM_SH_ATOMIC_H - -/* - * Atomic operations that C can't guarantee us. Useful for - * resource counting etc.. - * - */ - -typedef struct { volatile int counter; } atomic_t; - -#define ATOMIC_INIT(i) ( (atomic_t) { (i) } ) - -#define atomic_read(v) ((v)->counter) -#define atomic_set(v,i) ((v)->counter = (i)) - -#include <asm/system.h> - -/* - * To get proper branch prediction for the main line, we must branch - * forward to code at the end of this object's .text section, then - * branch back to restart the operation. - */ - -static __inline__ void atomic_add(int i, atomic_t * v) -{ - unsigned long flags; - - local_irq_save(flags); - *(long *)v += i; - local_irq_restore(flags); -} - -static __inline__ void atomic_sub(int i, atomic_t *v) -{ - unsigned long flags; - - local_irq_save(flags); - *(long *)v -= i; - local_irq_restore(flags); -} - -static __inline__ int atomic_add_return(int i, atomic_t * v) -{ - unsigned long temp, flags; - - local_irq_save(flags); - temp = *(long *)v; - temp += i; - *(long *)v = temp; - 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) -{ - unsigned long temp, flags; - - local_irq_save(flags); - temp = *(long *)v; - temp -= i; - *(long *)v = temp; - local_irq_restore(flags); - - return temp; -} - -#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) - -#define atomic_inc(v) atomic_add(1,(v)) -#define atomic_dec(v) atomic_sub(1,(v)) - -static __inline__ void atomic_clear_mask(unsigned int mask, atomic_t *v) -{ - unsigned long flags; - - local_irq_save(flags); - *(long *)v &= ~mask; - local_irq_restore(flags); -} - -static __inline__ void atomic_set_mask(unsigned int mask, atomic_t *v) -{ - unsigned long flags; - - local_irq_save(flags); - *(long *)v |= mask; - local_irq_restore(flags); -} - -/* Atomic operations are already serializing on SH */ -#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 /* __ASM_SH_ATOMIC_H */ |
