diff options
| author | David Howells <dhowells@redhat.com> | 2012-03-12 23:36:56 +0000 |
|---|---|---|
| committer | Bob Liu <lliubbo@gmail.com> | 2012-03-21 11:00:08 +0800 |
| commit | 3bed8d67469cc7129b0babc0211c32fa68408ce0 (patch) | |
| tree | c0d49ca0813d61e2c4f266b7da9dcc244bf8bee5 /arch/blackfin/include/asm/barrier.h | |
| parent | 0eceb82f55a9e3756cada9e60ecc3a9b7b5979f5 (diff) | |
Disintegrate asm/system.h for Blackfin [ver #2]
Disintegrate asm/system.h for Blackfin.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: uclinux-dist-devel@blackfin.uclinux.org
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Diffstat (limited to 'arch/blackfin/include/asm/barrier.h')
| -rw-r--r-- | arch/blackfin/include/asm/barrier.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/barrier.h b/arch/blackfin/include/asm/barrier.h new file mode 100644 index 000000000000..ebb189507dd7 --- /dev/null +++ b/arch/blackfin/include/asm/barrier.h @@ -0,0 +1,48 @@ +/* + * 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) +#else +# define mb() barrier() +# define rmb() barrier() +# define wmb() barrier() +# define read_barrier_depends() do { } while (0) +#endif + +#else /* !CONFIG_SMP */ + +#define mb() barrier() +#define rmb() barrier() +#define wmb() barrier() +#define read_barrier_depends() do { } while (0) + +#endif /* !CONFIG_SMP */ + +#define smp_mb() mb() +#define smp_rmb() rmb() +#define smp_wmb() wmb() +#define set_mb(var, value) do { var = value; mb(); } while (0) +#define smp_read_barrier_depends() read_barrier_depends() + +#endif /* _BLACKFIN_BARRIER_H */ |