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Diffstat (limited to 'arch/blackfin/include/asm/barrier.h')
| -rw-r--r-- | arch/blackfin/include/asm/barrier.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/barrier.h b/arch/blackfin/include/asm/barrier.h new file mode 100644 index 00000000000..42000687799 --- /dev/null +++ b/arch/blackfin/include/asm/barrier.h @@ -0,0 +1,35 @@ +/* + * Copyright 2004-2009 Analog Devices Inc. + * Tony Kou (tonyko@lineo.ca) + * + * Licensed under the GPL-2 or later + */ + +#ifndef _BLACKFIN_BARRIER_H +#define _BLACKFIN_BARRIER_H + +#include <asm/cache.h> + +#define nop() __asm__ __volatile__ ("nop;\n\t" : : ) + +/* + * Force strict CPU ordering. + */ +#ifdef CONFIG_SMP + +#ifdef __ARCH_SYNC_CORE_DCACHE +/* Force Core data cache coherence */ +# define mb() do { barrier(); smp_check_barrier(); smp_mark_barrier(); } while (0) +# define rmb() do { barrier(); smp_check_barrier(); } while (0) +# define wmb() do { barrier(); smp_mark_barrier(); } while (0) +# define read_barrier_depends() do { barrier(); smp_check_barrier(); } while (0) +#endif + +#endif /* !CONFIG_SMP */ + +#define smp_mb__before_atomic() barrier() +#define smp_mb__after_atomic() barrier() + +#include <asm-generic/barrier.h> + +#endif /* _BLACKFIN_BARRIER_H */ |