Viewing file:  atomic.h (840 B) -rw-r--r--
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_ATOMIC_H
#define __ASM_SH_ATOMIC_H
#if defined(CONFIG_CPU_J2)
#include <asm-generic/atomic.h>
#else
/*
* Atomic operations that C can't guarantee us. Useful for
* resource counting etc..
*
*/
#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/cmpxchg.h>
#include <asm/barrier.h>
#define arch_atomic_read(v) READ_ONCE((v)->counter)
#define arch_atomic_set(v,i) WRITE_ONCE((v)->counter, (i))
#if defined(CONFIG_GUSA_RB)
#include <asm/atomic-grb.h>
#elif defined(CONFIG_CPU_SH4A)
#include <asm/atomic-llsc.h>
#else
#include <asm/atomic-irq.h>
#endif
#define arch_atomic_xchg(v, new) (arch_xchg(&((v)->counter), new))
#define arch_atomic_cmpxchg(v, o, n) (arch_cmpxchg(&((v)->counter), (o), (n)))
#endif /* CONFIG_CPU_J2 */
#endif /* __ASM_SH_ATOMIC_H */
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