From a2494b9b5fb702becaf8d8e3138f7a1a0d3c537e Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Tue, 8 Sep 2009 16:23:08 +0900 Subject: [PATCH] sh: Kill off dcache writeback from copy_page(). Now that the cache purging is handled manually by all copy_page() callers, we can kill off copy_page()'s on writeback. This optimizes the non-aliasing case. Signed-off-by: Paul Mundt --- arch/sh/lib/copy_page.S | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/arch/sh/lib/copy_page.S b/arch/sh/lib/copy_page.S index 43de7e8e4e17..9d7b8bc51866 100644 --- a/arch/sh/lib/copy_page.S +++ b/arch/sh/lib/copy_page.S @@ -30,7 +30,9 @@ ENTRY(copy_page) mov r4,r10 mov r5,r11 mov r5,r8 - mov.l .Lpsz,r0 + mov #(PAGE_SIZE >> 10), r0 + shll8 r0 + shll2 r0 add r0,r8 ! 1: mov.l @r11+,r0 @@ -43,7 +45,6 @@ ENTRY(copy_page) mov.l @r11+,r7 #if defined(CONFIG_CPU_SH4) movca.l r0,@r10 - mov r10,r0 #else mov.l r0,@r10 #endif @@ -55,9 +56,6 @@ ENTRY(copy_page) mov.l r3,@-r10 mov.l r2,@-r10 mov.l r1,@-r10 -#if defined(CONFIG_CPU_SH4) - ocbwb @r0 -#endif cmp/eq r11,r8 bf/s 1b add #28,r10 @@ -68,9 +66,6 @@ ENTRY(copy_page) rts nop - .balign 4 -.Lpsz: .long PAGE_SIZE - /* * __kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n); * Return the number of bytes NOT copied -- 2.34.1