[U-Boot] [PATCH] armv7: Fix infinite loop for the spl boot

[Zhong Hongbo]

Hi Albert,

Could you applied the patch to the arm tree?

Thanks,
hongbo
On 07/03/2012 07:46 AM, Zhong Hongbo wrote:
> From: Zhong Hongbo <bocui107 at gmail.com>
> 
> In the spl booting step, When __bss_start is equal to __bss_end__,
> The loop will clear all the things in CPU space. If there are have
> the same address for this symbol, To skip the clear bss section.
> 
> Signed-off-by: Hongbo Zhong <bocui107 at gmail.com>
> ---
>  arch/arm/cpu/armv7/start.S |    3 +++
>  1 files changed, 3 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S
> index 76ccef1..c72f337 100644
> --- a/arch/arm/cpu/armv7/start.S
> +++ b/arch/arm/cpu/armv7/start.S
> @@ -258,6 +258,8 @@ clear_bss:
>  	/* No relocation for SPL */
>  	ldr	r0, =__bss_start
>  	ldr	r1, =__bss_end__
> +	cmp	r0, r1
> +	beq	skip_clbss
>  #else
>  	ldr	r0, _bss_start_ofs
>  	ldr	r1, _bss_end_ofs
> @@ -271,6 +273,7 @@ clbss_l:str	r2, [r0]		/* clear loop...		    */
>  	add	r0, r0, #4
>  	cmp	r0, r1
>  	bne	clbss_l
> +skip_clbss:
>  
>  /*
>   * We are done. Do not return, instead branch to second part of board
>