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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>
This commit is contained in:
LEROY Christophe 2015-05-19 12:07:55 +02:00 committed by Scott Wood
parent c152f149ce
commit 0b05e2d671
1 changed files with 8 additions and 8 deletions
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16
arch/powerpc/lib/copy_32.S
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@ -129,13 +129,18 @@ _GLOBAL(memset)
* We only use this version if the source and dest don't overlap. * We only use this version if the source and dest don't overlap.
* -- paulus. * -- 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 r7,r3,r5 /* test if the src & dst overlap */
add r8,r4,r5 add r8,r4,r5
cmplw 0,r4,r7 cmplw 0,r4,r7
cmplw 1,r3,r8 cmplw 1,r3,r8
crand 0,0,4 /* cr0.lt &= cr1.lt */ crand 0,0,4 /* cr0.lt &= cr1.lt */
blt memcpy /* if regions overlap */ blt generic_memcpy /* if regions overlap */
addi r4,r4,-4 addi r4,r4,-4
addi r6,r3,-4 addi r6,r3,-4
@ -201,12 +206,7 @@ _GLOBAL(cacheable_memcpy)
bdnz 40b bdnz 40b
65: blr 65: blr
_GLOBAL(memmove) _GLOBAL(generic_memcpy)
cmplw 0,r3,r4
bgt backwards_memcpy
/* fall through */
_GLOBAL(memcpy)
srwi. r7,r5,3 srwi. r7,r5,3
addi r6,r3,-4 addi r6,r3,-4
addi r4,r4,-4 addi r4,r4,-4