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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 */ |