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#ifndef __ARCH_M68K_ATOMIC__

#define __ARCH_M68K_ATOMIC__

/*

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

 * resource counting etc..

 */

/*

 * We do not have SMP m68k systems, so we don't have to deal with that.

 */

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)

static __inline__ void atomic_add(int i, atomic_t *v)

{

        __asm__ __volatile__("addl %1,%0" : "=m" (*v) : "id" (i), "0" (*v));

}

static __inline__ void atomic_sub(int i, atomic_t *v)

{

        __asm__ __volatile__("subl %1,%0" : "=m" (*v) : "id" (i), "0" (*v));

}

static __inline__ void atomic_inc(volatile atomic_t *v)

{

        __asm__ __volatile__("addql #1,%0" : "=m" (*v): "0" (*v));

}

static __inline__ void atomic_dec(volatile atomic_t *v)

{

        __asm__ __volatile__("subql #1,%0" : "=m" (*v): "0" (*v));

}

static __inline__ int atomic_dec_and_test(volatile atomic_t *v)

{

        char c;

        __asm__ __volatile__("subql #1,%1; seq %0" : "=d" (c), "=m" (*v): "1" (*v));

        return c != 0;

}

#define atomic_clear_mask(mask, v) \

        __asm__ __volatile__("andl %1,%0" : "=m" (*v) : "id" (~(mask)),"0"(*v))

#define atomic_set_mask(mask, v) \

        __asm__ __volatile__("orl %1,%0" : "=m" (*v) : "id" (mask),"0"(*v))

/* 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 /* __ARCH_M68K_ATOMIC __ */