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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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_read(v) READ_ONCE((v)->counter)
23#define atomic_set(v,i) WRITE_ONCE((v)->counter, (i))
24
25#if defined(CONFIG_GUSA_RB)
26#include <asm/atomic-grb.h>
27#elif defined(CONFIG_CPU_SH4A)
28#include <asm/atomic-llsc.h>
29#else
30#include <asm/atomic-irq.h>
31#endif
32
33#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
34#define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n)))
35
36#endif /* CONFIG_CPU_J2 */
37
38#endif /* __ASM_SH_ATOMIC_H */