• Thiemo Seufer's avatar
    [MIPS] Reimplement clear_page/copy_page · fb2a27e7
    Thiemo Seufer authored
    
    
    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: default avatarThiemo Seufer <ths@networkno.de>
    Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
    fb2a27e7
page.c 19.2 KB