/arch/sh/include/asm/atomic.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_SH_ATOMIC_H
 3#define __ASM_SH_ATOMIC_H
 4
 5#if defined(CONFIG_CPU_J2)
 6
 7#include <asm-generic/atomic.h>
 8
 9#else
10
11/*
12 * Atomic operations that C can't guarantee us.  Useful for
13 * resource counting etc..
14 *
15 */
16
17#include <linux/compiler.h>
18#include <linux/types.h>
19#include <asm/cmpxchg.h>
20#include <asm/barrier.h>
21
22#define ATOMIC_INIT(i)	{ (i) }
23
24#define atomic_read(v)		READ_ONCE((v)->counter)
25#define atomic_set(v,i)		WRITE_ONCE((v)->counter, (i))
26
27#if defined(CONFIG_GUSA_RB)
28#include <asm/atomic-grb.h>
29#elif defined(CONFIG_CPU_SH4A)
30#include <asm/atomic-llsc.h>
31#else
32#include <asm/atomic-irq.h>
33#endif
34
35#define atomic_xchg(v, new)		(xchg(&((v)->counter), new))
36#define atomic_cmpxchg(v, o, n)		(cmpxchg(&((v)->counter), (o), (n)))
37
38#endif /* CONFIG_CPU_J2 */
39
40#endif /* __ASM_SH_ATOMIC_H */