[U-Boot] [PATCH] arm: lib: memcpy: Do not copy to same address

Matthias Weisser
2011-05-23T09:06:50Z

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>
---
arch/arm/lib/memcpy.S | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/arm/lib/memcpy.S b/arch/arm/lib/memcpy.S
index 3b5aeec..f655256 100644
--- a/arch/arm/lib/memcpy.S
+++ b/arch/arm/lib/memcpy.S
@@ -60,6 +60,9 @@
.globl memcpy
memcpy:

+ cmp r0, r1
+ moveq pc, lr
+
enter r4, lr

subs r2, r2, #4
--
1.7.0.4