On 07/06/2012 01:44 PM, Albert ARIBAUD wrote:
Hi Zhong,
On Thu, 5 Jul 2012 22:35:15 +0800, Zhong Hongbo bocui107@gmail.com wrote:
From: Zhong Hongbo bocui107@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 bocui107@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
Just checking: that's the same as your 'infinite' patch, right?
You are right. I think the description(V1 patch) have not very clear, So I modify it.
Thanks, hongbo
Amicalement,