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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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18
include/asm-generic/tlbflush.h Normal file
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@@ -0,0 +1,18 @@
#ifndef __ASM_GENERIC_TLBFLUSH_H
#define __ASM_GENERIC_TLBFLUSH_H
/*
* This is a dummy tlbflush implementation that can be used on all
* nommu architectures.
* If you have an MMU, you need to write your own functions.
*/
#ifdef CONFIG_MMU
#error need to implement an architecture specific asm/tlbflush.h
#endif
static inline void flush_tlb_mm(struct mm_struct *mm)
{
BUG();
}
#endif /* __ASM_GENERIC_TLBFLUSH_H */