projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 10b663ae CM |
1 | /* |
| 2 | * Based on arch/arm/include/asm/barrier.h | |
| 3 | * | |
| 4 | * Copyright (C) 2012 ARM Ltd. | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | * | |
| 10 | * This program is distributed in the hope that it will be useful, | |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | * GNU General Public License for more details. | |
| 14 | * | |
| 15 | * You should have received a copy of the GNU General Public License | |
| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 17 | */ | |
| 18 | #ifndef __ASM_BARRIER_H | |
| 19 | #define __ASM_BARRIER_H | |
| 20 | ||
| 21 | #ifndef __ASSEMBLY__ | |
| 22 | ||
| 23 | #define sev() asm volatile("sev" : : : "memory") | |
| 24 | #define wfe() asm volatile("wfe" : : : "memory") | |
| 25 | #define wfi() asm volatile("wfi" : : : "memory") | |
| 26 | ||
| 27 | #define isb() asm volatile("isb" : : : "memory") | |
| 28 | #define dsb() asm volatile("dsb sy" : : : "memory") | |
| 29 | ||
| 30 | #define mb() dsb() | |
| 31 | #define rmb() asm volatile("dsb ld" : : : "memory") | |
| 32 | #define wmb() asm volatile("dsb st" : : : "memory") | |
| 33 | ||
| 34 | #ifndef CONFIG_SMP | |
| 35 | #define smp_mb() barrier() | |
| 36 | #define smp_rmb() barrier() | |
| 37 | #define smp_wmb() barrier() | |
| 38 | #else | |
| 39 | #define smp_mb() asm volatile("dmb ish" : : : "memory") | |
| 40 | #define smp_rmb() asm volatile("dmb ishld" : : : "memory") | |
| 41 | #define smp_wmb() asm volatile("dmb ishst" : : : "memory") | |
| 42 | #endif | |
| 43 | ||
| 44 | #define read_barrier_depends() do { } while(0) | |
| 45 | #define smp_read_barrier_depends() do { } while(0) | |
| 46 | ||
| 47 | #define set_mb(var, value) do { var = value; smp_mb(); } while (0) | |
| 48 | #define nop() asm volatile("nop"); | |
| 49 | ||
| 50 | #endif /* __ASSEMBLY__ */ | |
| 51 | ||
| 52 | #endif /* __ASM_BARRIER_H */ |