| Vineet Gupta | 14e968b | 2013-01-18 15:12:16 +0530 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | */ |
| 8 | |
| 9 | #ifndef __ASM_BARRIER_H |
| 10 | #define __ASM_BARRIER_H |
| 11 | |
| 12 | #ifndef __ASSEMBLY__ |
| 13 | |
| 14 | /* TODO-vineetg: Need to see what this does, don't we need sync anywhere */ |
| 15 | #define mb() __asm__ __volatile__ ("" : : : "memory") |
| 16 | #define rmb() mb() |
| 17 | #define wmb() mb() |
| 18 | #define set_mb(var, value) do { var = value; mb(); } while (0) |
| 19 | #define set_wmb(var, value) do { var = value; wmb(); } while (0) |
| 20 | #define read_barrier_depends() mb() |
| 21 | |
| 22 | /* TODO-vineetg verify the correctness of macros here */ |
| 23 | #ifdef CONFIG_SMP |
| 24 | #define smp_mb() mb() |
| 25 | #define smp_rmb() rmb() |
| 26 | #define smp_wmb() wmb() |
| 27 | #else |
| 28 | #define smp_mb() barrier() |
| 29 | #define smp_rmb() barrier() |
| 30 | #define smp_wmb() barrier() |
| 31 | #endif |
| 32 | |
| 33 | #define smp_mb__before_atomic_dec() barrier() |
| 34 | #define smp_mb__after_atomic_dec() barrier() |
| 35 | #define smp_mb__before_atomic_inc() barrier() |
| 36 | #define smp_mb__after_atomic_inc() barrier() |
| 37 | |
| 38 | #define smp_read_barrier_depends() do { } while (0) |
| 39 | |
| 40 | #endif |
| 41 | |
| 42 | #endif |