diff options
Diffstat (limited to 'include/asm-cris/atomic.h')
-rw-r--r-- | include/asm-cris/atomic.h | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/include/asm-cris/atomic.h b/include/asm-cris/atomic.h deleted file mode 100644 index 5fc8776..0000000 --- a/include/asm-cris/atomic.h +++ /dev/null @@ -1,164 +0,0 @@ -/* $Id: atomic.h,v 1.3 2001/07/25 16:15:19 bjornw Exp $ */ - -#ifndef __ASM_CRIS_ATOMIC__ -#define __ASM_CRIS_ATOMIC__ - -#include <linux/compiler.h> - -#include <asm/system.h> -#include <asm/arch/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) { (i) } - -#define atomic_read(v) ((v)->counter) -#define atomic_set(v,i) (((v)->counter) = (i)) - -/* These should be written in asm but we do it in C for now. */ - -static inline void atomic_add(int i, volatile atomic_t *v) -{ - unsigned long flags; - cris_atomic_save(v, flags); - v->counter += i; - cris_atomic_restore(v, flags); -} - -static inline void atomic_sub(int i, volatile atomic_t *v) -{ - unsigned long flags; - cris_atomic_save(v, flags); - v->counter -= i; - cris_atomic_restore(v, flags); -} - -static inline int atomic_add_return(int i, volatile atomic_t *v) -{ - unsigned long flags; - int retval; - cris_atomic_save(v, flags); - retval = (v->counter += i); - cris_atomic_restore(v, flags); - return retval; -} - -#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0) - -static inline int atomic_sub_return(int i, volatile atomic_t *v) -{ - unsigned long flags; - int retval; - cris_atomic_save(v, flags); - retval = (v->counter -= i); - cris_atomic_restore(v, flags); - return retval; -} - -static inline int atomic_sub_and_test(int i, volatile atomic_t *v) -{ - int retval; - unsigned long flags; - cris_atomic_save(v, flags); - retval = (v->counter -= i) == 0; - cris_atomic_restore(v, flags); - return retval; -} - -static inline void atomic_inc(volatile atomic_t *v) -{ - unsigned long flags; - cris_atomic_save(v, flags); - (v->counter)++; - cris_atomic_restore(v, flags); -} - -static inline void atomic_dec(volatile atomic_t *v) -{ - unsigned long flags; - cris_atomic_save(v, flags); - (v->counter)--; - cris_atomic_restore(v, flags); -} - -static inline int atomic_inc_return(volatile atomic_t *v) -{ - unsigned long flags; - int retval; - cris_atomic_save(v, flags); - retval = ++(v->counter); - cris_atomic_restore(v, flags); - return retval; -} - -static inline int atomic_dec_return(volatile atomic_t *v) -{ - unsigned long flags; - int retval; - cris_atomic_save(v, flags); - retval = --(v->counter); - cris_atomic_restore(v, flags); - return retval; -} -static inline int atomic_dec_and_test(volatile atomic_t *v) -{ - int retval; - unsigned long flags; - cris_atomic_save(v, flags); - retval = --(v->counter) == 0; - cris_atomic_restore(v, flags); - return retval; -} - -static inline int atomic_inc_and_test(volatile atomic_t *v) -{ - int retval; - unsigned long flags; - cris_atomic_save(v, flags); - retval = ++(v->counter) == 0; - cris_atomic_restore(v, flags); - return retval; -} - -static inline int atomic_cmpxchg(atomic_t *v, int old, int new) -{ - int ret; - unsigned long flags; - - cris_atomic_save(v, flags); - ret = v->counter; - if (likely(ret == old)) - v->counter = new; - cris_atomic_restore(v, flags); - return ret; -} - -#define atomic_xchg(v, new) (xchg(&((v)->counter), new)) - -static inline int atomic_add_unless(atomic_t *v, int a, int u) -{ - int ret; - unsigned long flags; - - cris_atomic_save(v, flags); - ret = v->counter; - if (ret != u) - v->counter += a; - cris_atomic_restore(v, flags); - return ret != u; -} -#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) - -/* 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() - -#include <asm-generic/atomic.h> -#endif |