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#ifndef _OR32_ATOMIC_H
#define _OR32_ATOMIC_H
 
#include <linux/config.h>
#include <asm/system.h>
 
#ifdef __KERNEL__
 
#define ATOMIC_INIT(i)	{ (i) }
 
#define atomic_read(v)		((v)->counter)
#define atomic_set(v,i)		(((v)->counter) = (i))
 
/*
 * Atomic operations that C can't guarantee us.  Useful for
 * resource counting etc..
 */
 
typedef struct { volatile int counter; } atomic_t;
 
static __inline__ void atomic_add(int i, volatile atomic_t *v)
{
	unsigned long flags;
	save_and_cli(flags);
	v->counter += i;
	restore_flags(flags);
}
 
static __inline__ void atomic_sub(int i, volatile atomic_t *v)
{
	unsigned long flags;
	save_and_cli(flags);
	v->counter -= i;
	restore_flags(flags);
}
 
static __inline__ int atomic_add_return(int i, volatile atomic_t *v)
{
	unsigned long flags;
	int retval;
	save_and_cli(flags);
	retval = (v->counter += i);
	restore_flags(flags);
	return retval;
}
 
static __inline__ int atomic_sub_return(int i, volatile atomic_t *v)
{
	unsigned long flags;
	int retval;
	save_and_cli(flags);
	retval = (v->counter -= i);
	restore_flags(flags);
	return retval;
}
 
static __inline__ int atomic_sub_and_test(int i, volatile atomic_t *v)
{
	int retval;
	unsigned long flags;
	save_and_cli(flags);
	retval = (v->counter -= i) == 0;
	restore_flags(flags);
	return retval;
}
 
static __inline__ void atomic_inc(volatile atomic_t *v)
{
	unsigned long flags;
	save_and_cli(flags);
	(v->counter)++;
	restore_flags(flags);
}
 
static __inline__ void atomic_dec(volatile atomic_t *v)
{
	unsigned long flags;
	save_and_cli(flags);
	(v->counter)--;
	restore_flags(flags);
}
 
static __inline__ int atomic_inc_return(volatile atomic_t *v)
{
	unsigned long flags;
	int retval;
	save_and_cli(flags);
	retval = (v->counter)++;
	restore_flags(flags);
	return retval;
}
 
static __inline__ int atomic_dec_return(volatile atomic_t *v)
{
	unsigned long flags;
	int retval;
	save_and_cli(flags);
	retval = (v->counter)--;
	restore_flags(flags);
	return retval;
}
static __inline__ int atomic_dec_and_test(volatile atomic_t *v)
{
	int retval;
	unsigned long flags;
	save_and_cli(flags);
	retval = --(v->counter) == 0;
	restore_flags(flags);
	return retval;
}
 
static __inline__ int atomic_inc_and_test(volatile atomic_t *v)
{
	int retval;
	unsigned long flags;
	save_and_cli(flags);
	retval = ++(v->counter) == 0;
	restore_flags(flags);
	return retval;
}
 
/* 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()
 
#endif
#endif /* _OR32_ATOMIC_H */