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Diffstat (limited to 'arch/xtensa/include/asm/barrier.h')
| -rw-r--r-- | arch/xtensa/include/asm/barrier.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/barrier.h b/arch/xtensa/include/asm/barrier.h new file mode 100644 index 0000000000..898ea397e9 --- /dev/null +++ b/arch/xtensa/include/asm/barrier.h @@ -0,0 +1,31 @@ +/* + * 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 - 2012 Tensilica Inc. + */ + +#ifndef _XTENSA_SYSTEM_H +#define _XTENSA_SYSTEM_H + +#include <asm/core.h> + +#define __mb() ({ __asm__ __volatile__("memw" : : : "memory"); }) +#define __rmb() barrier() +#define __wmb() __mb() + +#ifdef CONFIG_SMP +#define __smp_mb() __mb() +#define __smp_rmb() __rmb() +#define __smp_wmb() __wmb() +#endif + +#if XCHAL_HAVE_S32C1I +#define __smp_mb__before_atomic() barrier() +#define __smp_mb__after_atomic() barrier() +#endif + +#include <asm-generic/barrier.h> + +#endif /* _XTENSA_SYSTEM_H */ |