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[SPARC64]: Optimized TSB table initialization.

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We only need to write an invalid tag every 16 bytes,
so taking advantage of this can save many instructions
compared to the simple memset() call we make now.

A prefetching implementation is implemented for sun4u
and a block-init store version if implemented for Niagara.

The next trick is to be able to perform an init and
a copy_tsb() in parallel when growing a TSB table.

Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
David S. Miller 2006-03-18 23:55:11 -08:00
commit bb8646d834
4 changed files with 72 additions and 1 deletions
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1
include/asm-sparc64/mmu.h
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@ -88,6 +88,7 @@ struct tsb {
extern void __tsb_insert(unsigned long ent, unsigned long tag, unsigned long pte);
extern void tsb_flush(unsigned long ent, unsigned long tag);
extern void tsb_init(struct tsb *tsb, unsigned long size);
typedef struct {
spinlock_t lock;