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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 <davem@davemloft.net>
This commit is contained in:
David S. Miller
2006-03-18 23:55:11 -08:00
parent 88d7079458
commit bb8646d834
4 changed files with 72 additions and 1 deletions
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1
arch/sparc64/lib/NGbzero.S
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@@ -157,6 +157,7 @@ niagara_patch_bzero:
NG_DO_PATCH(memset, NGmemset)
NG_DO_PATCH(__bzero, NGbzero)
NG_DO_PATCH(__clear_user, NGclear_user)
NG_DO_PATCH(tsb_init, NGtsb_init)
retl
nop
.size niagara_patch_bzero,.-niagara_patch_bzero