[U-Boot] [PATCH] armv7: Fix to mistake clean the memory space

[Zhong Hongbo]

On 07/06/2012 01:44 PM, Albert ARIBAUD wrote:
> Hi Zhong,
> 
> On Thu,  5 Jul 2012 22:35:15 +0800, Zhong Hongbo <bocui107 at gmail.com> wrote:
>> From: Zhong Hongbo <bocui107 at 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 at 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,
>