leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

arm: lib: memcpy: Do not copy to same address

Browse Source 
In some cases (e.g. bootm with a elf payload which is already at the right
position) there is a in place copy of data to the same address. Catching this
saves some ms while booting.

Signed-off-by: Matthias Weisser <weisserm@arcor.de>
This commit is contained in:
Matthias Weisser 2011-05-22 23:06:50 +00:00 committed by Albert ARIBAUD
parent 2141e14428
commit 34fe8281d7
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/arm/lib/memcpy.S
View File

@ -60,6 +60,9 @@
.globl memcpy
memcpy:
cmp r0, r1
moveq pc, lr
enter r4, lr
subs r2, r2, #4