[MIPS] Reimplement clear_page/copy_page

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Fold the SB-1 specific implementation of clear_page/copy_page in the
generic version, and rewrite that one in tlbex style. The immediate
benefits:
  - It converts the compile-time workaround for SB-1 pass 1 prefetches
    to a more efficient run-time check.
  - It allows adjustment of loop unfolling, which helps to reduce the
    number of redundant cdex cache ops.
  - It fixes some esoteric cornercases (the cache line length calculations
    can go wrong, and support for 64k pages without prefetch instructions
    will overflow the addiu immediate).
  - Somewhat better guesses of "good" prefetch values.

Signed-off-by: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

...

This commit is contained in:

Thiemo Seufer 2008-02-18 19:32:49 +00:00 • committed by Ralf Baechle

parent 064922a805

commit fb2a27e743

6 changed files with 725 additions and 862 deletions

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37

arch/mips/mm/Makefile

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684

arch/mips/mm/page.c

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534

arch/mips/mm/pg-r4k.c

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302

arch/mips/mm/pg-sb1.c

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26

arch/mips/mm/uasm.c

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4

arch/mips/mm/uasm.h

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