| David Howells | f9aa7e1 | 2012-03-28 18:30:03 +0100 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| Max Filippov | 599bf77 | 2012-11-24 06:22:08 +0400 | [diff] [blame^] | 6 | * Copyright (C) 2001 - 2012 Tensilica Inc. |
| David Howells | f9aa7e1 | 2012-03-28 18:30:03 +0100 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #ifndef _XTENSA_SYSTEM_H |
| 10 | #define _XTENSA_SYSTEM_H |
| 11 | |
| 12 | #define smp_read_barrier_depends() do { } while(0) |
| 13 | #define read_barrier_depends() do { } while(0) |
| 14 | |
| Max Filippov | 599bf77 | 2012-11-24 06:22:08 +0400 | [diff] [blame^] | 15 | #define mb() ({ __asm__ __volatile__("memw" : : : "memory"); }) |
| 16 | #define rmb() barrier() |
| David Howells | f9aa7e1 | 2012-03-28 18:30:03 +0100 | [diff] [blame] | 17 | #define wmb() mb() |
| 18 | |
| 19 | #ifdef CONFIG_SMP |
| 20 | #error smp_* not defined |
| 21 | #else |
| 22 | #define smp_mb() barrier() |
| 23 | #define smp_rmb() barrier() |
| 24 | #define smp_wmb() barrier() |
| 25 | #endif |
| 26 | |
| 27 | #define set_mb(var, value) do { var = value; mb(); } while (0) |
| 28 | |
| 29 | #endif /* _XTENSA_SYSTEM_H */ |