| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 | |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 */ |