| /* 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 ATOMIC_INIT(i) { (i) } |
| |
| #define atomic_read(v) READ_ONCE((v)->counter) |
| #define 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 atomic_xchg(v, new) (xchg(&((v)->counter), new)) |
| #define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n))) |
| |
| #endif /* CONFIG_CPU_J2 */ |
| |
| #endif /* __ASM_SH_ATOMIC_H */ |
