| David Howells | ae47394 | 2012-03-28 18:30:01 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2004-2006 Atmel Corporation |
| 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 | #ifndef __ASM_AVR32_BARRIER_H |
| 9 | #define __ASM_AVR32_BARRIER_H |
| 10 | |
| Paul Gortmaker | 167d821 | 2012-04-03 19:14:04 -0400 | [diff] [blame] | 11 | #define nop() asm volatile("nop") |
| 12 | |
| David Howells | ae47394 | 2012-03-28 18:30:01 +0100 | [diff] [blame] | 13 | #define mb() asm volatile("" : : : "memory") |
| 14 | #define rmb() mb() |
| 15 | #define wmb() asm volatile("sync 0" : : : "memory") |
| 16 | #define read_barrier_depends() do { } while(0) |
| 17 | #define set_mb(var, value) do { var = value; mb(); } while(0) |
| 18 | |
| 19 | #ifdef CONFIG_SMP |
| 20 | # error "The AVR32 port does not support SMP" |
| 21 | #else |
| 22 | # define smp_mb() barrier() |
| 23 | # define smp_rmb() barrier() |
| 24 | # define smp_wmb() barrier() |
| 25 | # define smp_read_barrier_depends() do { } while(0) |
| 26 | #endif |
| 27 | |
| 28 | |
| 29 | #endif /* __ASM_AVR32_BARRIER_H */ |