#ifndef __ARCH_BLACKFIN_ATOMIC__
#define __ARCH_BLACKFIN_ATOMIC__

#include <linux/types.h>
#include <asm/system.h> /* local_irq_XXX() */

/*
 * Atomic operations that C can't guarantee us.  Useful for
 * resource counting etc..
 *
 * Generally we do not concern about SMP BFIN systems, so we don't have
 * to deal with that.
 *
 * Tony Kou (tonyko@lineo.ca)   Lineo Inc.   2001
 */

#define ATOMIC_INIT(i)  { (i) }
#define atomic_set(v, i)        (((v)->counter) = i)

#ifdef CONFIG_SMP

#define atomic_read(v)  __raw_uncached_fetch_asm(&(v)->counter)

asmlinkage int __raw_uncached_fetch_asm(const volatile int *ptr);

asmlinkage int __raw_atomic_update_asm(volatile int *ptr, int value);

asmlinkage int __raw_atomic_clear_asm(volatile int *ptr, int value);

asmlinkage int __raw_atomic_set_asm(volatile int *ptr, int value);

asmlinkage int __raw_atomic_xor_asm(volatile int *ptr, int value);

asmlinkage int __raw_atomic_test_asm(const volatile int *ptr, int value);

static inline void atomic_add(int i, atomic_t *v)
{
        __raw_atomic_update_asm(&v->counter, i);
}

static inline void atomic_sub(int i, atomic_t *v)
{
        __raw_atomic_update_asm(&v->counter, -i);
}

static inline int atomic_add_return(int i, atomic_t *v)
{
        return __raw_atomic_update_asm(&v->counter, i);
}

static inline int atomic_sub_return(int i, atomic_t *v)
{
        return __raw_atomic_update_asm(&v->counter, -i);
}

static inline void atomic_inc(volatile atomic_t *v)
{
        __raw_atomic_update_asm(&v->counter, 1);
}

static inline void atomic_dec(volatile atomic_t *v)
{
        __raw_atomic_update_asm(&v->counter, -1);
}

static inline void atomic_clear_mask(int mask, atomic_t *v)
{
        __raw_atomic_clear_asm(&v->counter, mask);
}

static inline void atomic_set_mask(int mask, atomic_t *v)
{
        __raw_atomic_set_asm(&v->counter, mask);
}

static inline int atomic_test_mask(int mask, atomic_t *v)
{
        return __raw_atomic_test_asm(&v->counter, mask);
}

/* 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()

#else /* !CONFIG_SMP */

#define atomic_read(v)  ((v)->counter)

static inline void atomic_add(int i, atomic_t *v)
{
        long flags;

        local_irq_save_hw(flags);
        v->counter += i;
        local_irq_restore_hw(flags);
}

static inline void atomic_sub(int i, atomic_t *v)
{
        long flags;

        local_irq_save_hw(flags);
        v->counter -= i;
        local_irq_restore_hw(flags);

}

static inline int atomic_add_return(int i, atomic_t *v)
{
        int __temp = 0;
        long flags;

        local_irq_save_hw(flags);
        v->counter += i;
        __temp = v->counter;
        local_irq_restore_hw(flags);


        return __temp;
}

static inline int atomic_sub_return(int i, atomic_t *v)
{
        int __temp = 0;
        long flags;

        local_irq_save_hw(flags);
        v->counter -= i;
        __temp = v->counter;
        local_irq_restore_hw(flags);

        return __temp;
}

static inline void atomic_inc(volatile atomic_t *v)
{
        long flags;

        local_irq_save_hw(flags);
        v->counter++;
        local_irq_restore_hw(flags);
}

static inline void atomic_dec(volatile atomic_t *v)
{
        long flags;

        local_irq_save_hw(flags);
        v->counter--;
        local_irq_restore_hw(flags);
}

static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
{
        long flags;

        local_irq_save_hw(flags);
        v->counter &= ~mask;
        local_irq_restore_hw(flags);
}

static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
{
        long flags;

        local_irq_save_hw(flags);
        v->counter |= mask;
        local_irq_restore_hw(flags);
}

/* 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 /* !CONFIG_SMP */

#define atomic_add_negative(a, v)       (atomic_add_return((a), (v)) < 0)
#define atomic_dec_return(v) atomic_sub_return(1,(v))
#define atomic_inc_return(v) atomic_add_return(1,(v))

#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
#define atomic_xchg(v, new) (xchg(&((v)->counter), new))

#define atomic_add_unless(v, a, u)                              \
({                                                              \
        int c, old;                                             \
        c = atomic_read(v);                                     \
        while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \
                c = old;                                        \
        c != (u);                                               \
})
#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)

/*
 * atomic_inc_and_test - increment and test
 * @v: pointer of type atomic_t
 *
 * Atomically increments @v by 1
 * and returns true if the result is zero, or false for all
 * other cases.
 */
#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)

#define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0)
#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)

#include <asm-generic/atomic.h>

#endif                          /* __ARCH_BLACKFIN_ATOMIC __ */