/* $Id: atomic.h,v 1.3 2001/07/25 16:15:19 bjornw Exp $ */ #ifndef __ASM_CRIS_ATOMIC__#define __ASM_CRIS_ATOMIC__ #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