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| author |   Arnd Bergmann <arnd@arndb.de> | 2009-05-13 22:56:36 +0000 |
|---|---|---|
| committer |   Arnd Bergmann <arnd@klappe2.(none)> | 2009-06-11 21:02:50 +0200 |
| commit | 5c01b46bb6bb8f2662573c05c87b5d68fa25af89 (patch) | |
| tree | 77a85f19546e08ad8dfdb21b380bbdf8fb1c857e /include/asm-generic/cache.h | |
| parent | asm-generic: add generic atomic.h and io.h (diff) | |
| download | linux-dev-5c01b46bb6bb8f2662573c05c87b5d68fa25af89.tar.xz linux-dev-5c01b46bb6bb8f2662573c05c87b5d68fa25af89.zip | |
asm-generic: add generic NOMMU versions of some headers
Memory management in generic is highly architecture specific,
but on NOMMU architectures, it is mostly trivial, so just
add a default implementation in asm-generic that applies
to all NOMMU architectures.
The two files cache.h and cacheflush.h can possibly also
be used by architectures that have an MMU but never require
flushing the cache or have cache lines larger than 32 bytes.
Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include/asm-generic/cache.h')
| -rw-r--r-- | include/asm-generic/cache.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/asm-generic/cache.h b/include/asm-generic/cache.h new file mode 100644 index 000000000000..1bfcfe5c2237 --- /dev/null +++ b/include/asm-generic/cache.h @@ -0,0 +1,12 @@ +#ifndef __ASM_GENERIC_CACHE_H +#define __ASM_GENERIC_CACHE_H +/* + * 32 bytes appears to be the most common cache line size, + * so make that the default here. Architectures with larger + * cache lines need to provide their own cache.h. + */ + +#define L1_CACHE_SHIFT 5 +#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) + +#endif /* __ASM_GENERIC_CACHE_H */ |