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| author | David Howells <dhowells@redhat.com> | 2012-03-28 18:30:02 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2012-03-28 18:30:02 +0100 |
| commit | 40ab3317493609c9a8199492588ae7bf88eb12d6 (patch) | |
| tree | 5758d163e818debc0ac63506be16b858db85a1e8 /arch/frv/include/asm/barrier.h | |
| parent | b1a154dbf9ddbf396578642299ce75aa73d01763 (diff) | |
| download | lwn-40ab3317493609c9a8199492588ae7bf88eb12d6.tar.gz lwn-40ab3317493609c9a8199492588ae7bf88eb12d6.zip | |
Disintegrate asm/system.h for FRV
Disintegrate asm/system.h for FRV.
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'arch/frv/include/asm/barrier.h')
| -rw-r--r-- | arch/frv/include/asm/barrier.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/frv/include/asm/barrier.h b/arch/frv/include/asm/barrier.h new file mode 100644 index 000000000000..06776ad9f5e9 --- /dev/null +++ b/arch/frv/include/asm/barrier.h @@ -0,0 +1,29 @@ +/* FR-V CPU memory barrier definitions + * + * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#ifndef _ASM_BARRIER_H +#define _ASM_BARRIER_H + +#define nop() asm volatile ("nop"::) + +#define mb() asm volatile ("membar" : : :"memory") +#define rmb() asm volatile ("membar" : : :"memory") +#define wmb() asm volatile ("membar" : : :"memory") +#define read_barrier_depends() do { } while (0) + +#define smp_mb() barrier() +#define smp_rmb() barrier() +#define smp_wmb() barrier() +#define smp_read_barrier_depends() do {} while(0) +#define set_mb(var, value) \ + do { var = (value); barrier(); } while (0) + +#endif /* _ASM_BARRIER_H */ |