From: Zhong Hongbo <bocui...@gmail.com>
In currently, when __bss_start is equal to __bss_end__,
The bss loop will clear all the things in memory space.
But just only when __bss_end__ greater than __bss_start__,
we do the clear bss section operation.
Signed-off-by: Hongbo Zhong <bocui...@gmail.com>
---
arch/arm/cpu/armv7/start.S | 9 ++++++---
1 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S
index 22a3ced..2e583ee 100644
--- a/arch/arm/cpu/armv7/start.S
+++ b/arch/arm/cpu/armv7/start.S
@@ -259,10 +259,13 @@ clear_bss:
#endif
mov r2, #0x00000000 /* clear */
-clbss_l:str r2, [r0] /* clear loop... */
+clbss_l:
+ cmp r1, r0
+ bls clbss_end
+ str r2, [r0] /* clear loop... */
add r0, r0, #4
- cmp r0, r1
- bne clbss_l
+ b clbss_l
+clbss_end:
/*
* We are done. Do not return, instead branch to second part of board
--
1.7.5.4
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
