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

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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
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3
arch/arm/lib/memcpy.S
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@ -60,6 +60,9 @@
.globl memcpy
memcpy:
cmp r0, r1
moveq pc, lr
enter r4, lr
subs r2, r2, #4