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sh: page table alloc cleanups and page fault optimizations.

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Cleanup of page table allocators, using generic folded PMD and PUD
helpers. TLB flushing operations are moved to a more sensible spot.

The page fault handler is also optimized slightly, we no longer waste
cycles on IRQ disabling for flushing of the page from the ITLB, since
we're already under CLI protection by the initial exception handler.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2006-09-27 15:13:36 +09:00
parent 9359e75770
commit 26ff6c11ef
13 changed files with 261 additions and 267 deletions
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8
include/asm-sh/cache.h
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@ -10,7 +10,6 @@
#ifdef __KERNEL__
#include <asm/cpu/cache.h>
#include <asm/cpu/cacheflush.h>
#define SH_CACHE_VALID 1
#define SH_CACHE_UPDATED 2
@ -49,12 +48,5 @@ struct cache_info {
unsigned long flags;
};
/* Flush (write-back only) a region (smaller than a page) */
extern void __flush_wback_region(void *start, int size);
/* Flush (write-back & invalidate) a region (smaller than a page) */
extern void __flush_purge_region(void *start, int size);
/* Flush (invalidate only) a region (smaller than a page) */
extern void __flush_invalidate_region(void *start, int size);
#endif /* __KERNEL__ */
#endif /* __ASM_SH_CACHE_H */