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authorLEROY Christophe <christophe.leroy@c-s.fr>2015-05-19 13:07:55 +0300
committerScott Wood <scottwood@freescale.com>2015-08-08 06:59:27 +0300
commit0b05e2d671c40cfb57e66e4e402320d6e056b2f8 (patch)
treeeb65c72686b12660574f006ea95fad1742c566cc /arch/powerpc/lib
parentc152f149ce8e47bc04061a9e9e5f53e219ee5b95 (diff)
downloadlinux-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/powerpc/lib')
-rw-r--r--arch/powerpc/lib/copy_32.S16
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