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#ifndef __ASM_CRIS_ATOMIC__

#define __ASM_CRIS_ATOMIC__

#include <asm/system.h>

/*

 * Atomic operations that C can't guarantee us.  Useful for

 * resource counting etc..

 */

/*

 * Make sure gcc doesn't try to be clever and move things around

 * on us. We need to use _exactly_ the address the user gave us,

 * not some alias that contains the same information.

 */

#define __atomic_fool_gcc(x) (*(struct { int a[100]; } *)x)

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))

/* These should be written in asm but we do it in C for now. */

extern __inline__ void atomic_add(int i, volatile atomic_t *v)

{

        unsigned long flags;

        save_flags(flags);

        cli();

        v->counter += i;

        restore_flags(flags);

}

extern __inline__ void atomic_sub(int i, volatile atomic_t *v)

{

        unsigned long flags;

        save_flags(flags);

        cli();

        v->counter -= i;

        restore_flags(flags);

}

extern __inline__ int atomic_add_return(int i, volatile atomic_t *v)

{

        unsigned long flags;

        int retval;

        save_flags(flags);

        cli();

        retval = (v->counter += i);

        restore_flags(flags);

        return retval;

}

extern __inline__ int atomic_sub_return(int i, volatile atomic_t *v)

{

        unsigned long flags;

        int retval;

        save_flags(flags);

        cli();

        retval = (v->counter -= i);

        restore_flags(flags);

        return retval;

}

extern __inline__ int atomic_sub_and_test(int i, volatile atomic_t *v)

{

        int retval;

        unsigned long flags;

        save_flags(flags);

        cli();

        retval = (v->counter -= i) == 0;

        restore_flags(flags);

        return retval;

}

extern __inline__ void atomic_inc(volatile atomic_t *v)

{

        unsigned long flags;

        save_flags(flags);

        cli();

        (v->counter)++;

        restore_flags(flags);

}

extern __inline__ void atomic_dec(volatile atomic_t *v)

{

        unsigned long flags;

        save_flags(flags);

        cli();

        (v->counter)--;

        restore_flags(flags);

}

extern __inline__ int atomic_inc_return(volatile atomic_t *v)

{

        unsigned long flags;

        int retval;

        save_flags(flags);

        cli();

        retval = (v->counter)++;

        restore_flags(flags);

        return retval;

}

extern __inline__ int atomic_dec_return(volatile atomic_t *v)

{

        unsigned long flags;

        int retval;

        save_flags(flags);

        cli();

        retval = (v->counter)--;

        restore_flags(flags);

        return retval;

}

extern __inline__ int atomic_dec_and_test(volatile atomic_t *v)

{

        int retval;

        unsigned long flags;

        save_flags(flags);

        cli();

        retval = --(v->counter) == 0;

        restore_flags(flags);

        return retval;

}

extern __inline__ int atomic_inc_and_test(volatile atomic_t *v)

{

        int retval;

        unsigned long flags;

        save_flags(flags);

        cli();

        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