1#ifndef __ASM_METAG_ATOMIC_H
2#define __ASM_METAG_ATOMIC_H
3
4#include <linux/compiler.h>
5#include <linux/types.h>
6#include <asm/cmpxchg.h>
7#include <asm/barrier.h>
8
9#if defined(CONFIG_METAG_ATOMICITY_IRQSOFF)
10/* The simple UP case. */
11#include <asm-generic/atomic.h>
12#else
13
14#if defined(CONFIG_METAG_ATOMICITY_LOCK1)
15#include <asm/atomic_lock1.h>
16#else
17#include <asm/atomic_lnkget.h>
18#endif
19
20#define atomic_add_negative(a, v)       (atomic_add_return((a), (v)) < 0)
21
22#define atomic_dec_return(v) atomic_sub_return(1, (v))
23#define atomic_inc_return(v) atomic_add_return(1, (v))
24
25/*
26 * atomic_inc_and_test - increment and test
27 * @v: pointer of type atomic_t
28 *
29 * Atomically increments @v by 1
30 * and returns true if the result is zero, or false for all
31 * other cases.
32 */
33#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
34
35#define atomic_sub_and_test(i, v) (atomic_sub_return((i), (v)) == 0)
36#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)
37
38#define atomic_inc(v) atomic_add(1, (v))
39#define atomic_dec(v) atomic_sub(1, (v))
40
41#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
42
43#endif
44
45#define atomic_dec_if_positive(v)       atomic_sub_if_positive(1, v)
46
47#include <asm-generic/atomic64.h>
48
49#endif /* __ASM_METAG_ATOMIC_H */
50