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asm-generic: add generic NOMMU versions of some headers

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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>
This commit is contained in:
Arnd Bergmann 2009-05-13 22:56:36 +00:00 • committed by Arnd Bergmann
parent 3f7e212df8
commit 5c01b46bb6
8 changed files with 240 additions and 0 deletions
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12
include/asm-generic/cache.h Normal file
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#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 */