diff options
Diffstat (limited to 'arch/xtensa/include/asm/barrier.h')
| -rw-r--r-- | arch/xtensa/include/asm/barrier.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/barrier.h b/arch/xtensa/include/asm/barrier.h new file mode 100644 index 00000000000..55707a8009d --- /dev/null +++ b/arch/xtensa/include/asm/barrier.h @@ -0,0 +1,29 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2001 - 2005 Tensilica Inc. + */ + +#ifndef _XTENSA_SYSTEM_H +#define _XTENSA_SYSTEM_H + +#define smp_read_barrier_depends() do { } while(0) +#define read_barrier_depends() do { } while(0) + +#define mb() barrier() +#define rmb() mb() +#define wmb() mb() + +#ifdef CONFIG_SMP +#error smp_* not defined +#else +#define smp_mb() barrier() +#define smp_rmb() barrier() +#define smp_wmb() barrier() +#endif + +#define set_mb(var, value) do { var = value; mb(); } while (0) + +#endif /* _XTENSA_SYSTEM_H */ |