diff options
| author | LEROY Christophe <christophe.leroy@c-s.fr> | 2015-05-19 13:07:55 +0300 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-08-08 06:59:27 +0300 |
| commit | 0b05e2d671c40cfb57e66e4e402320d6e056b2f8 (patch) | |
| tree | eb65c72686b12660574f006ea95fad1742c566cc /arch | |
| parent | c152f149ce8e47bc04061a9e9e5f53e219ee5b95 (diff) | |
| download | linux-0b05e2d671c40cfb57e66e4e402320d6e056b2f8.tar.xz | |
powerpc/32: cacheable_memcpy becomes memcpy
cacheable_memcpy uses dcbz instruction and is more efficient than
memcpy when the destination is in RAM. If the destination is in an
io area, memcpy_toio() is normally used, not memcpy
This patch renames memcpy as generic_memcpy, and renames
cacheable_memcpy as memcpy
On MPC885, we get approximatly 7% increase of the transfer rate
on an FTP reception
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/lib/copy_32.S | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S index 9262071a9707..1d49c740407a 100644 --- a/arch/powerpc/lib/copy_32.S +++ b/arch/powerpc/lib/copy_32.S @@ -129,13 +129,18 @@ _GLOBAL(memset) * We only use this version if the source and dest don't overlap. * -- paulus. */ -_GLOBAL(cacheable_memcpy) +_GLOBAL(memmove) + cmplw 0,r3,r4 + bgt backwards_memcpy + /* fall through */ + +_GLOBAL(memcpy) add r7,r3,r5 /* test if the src & dst overlap */ add r8,r4,r5 cmplw 0,r4,r7 cmplw 1,r3,r8 crand 0,0,4 /* cr0.lt &= cr1.lt */ - blt memcpy /* if regions overlap */ + blt generic_memcpy /* if regions overlap */ addi r4,r4,-4 addi r6,r3,-4 @@ -201,12 +206,7 @@ _GLOBAL(cacheable_memcpy) bdnz 40b 65: blr -_GLOBAL(memmove) - cmplw 0,r3,r4 - bgt backwards_memcpy - /* fall through */ - -_GLOBAL(memcpy) +_GLOBAL(generic_memcpy) srwi. r7,r5,3 addi r6,r3,-4 addi r4,r4,-4 |