[U-Boot] [PATCH 2/5] ARM: arm926ejs: fix lowlevel_init call

[Stefano Babic <sbabic@denx.de>]

On 21/04/2018 17:11, Mans Rullgard wrote:
> The code attempts to preserve the value of LR by storing it in R12/IP
> across the lowevel_init() call.  However, this register is not saved
> by the callee.  Use a register that guaranteed to be preserved instead.
> 
> Signed-off-by: Mans Rullgard <mans@mansr.com>
> ---
>  arch/arm/cpu/arm926ejs/start.S | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S
> index 959d1ed86d8a..a6f0bdb70345 100644
> --- a/arch/arm/cpu/arm926ejs/start.S
> +++ b/arch/arm/cpu/arm926ejs/start.S
> @@ -105,9 +105,9 @@ flush_dcache:
>  	/*
>  	 * Go setup Memory and board specific bits prior to relocation.
>  	 */
> -	mov	ip, lr		/* perserve link reg across call */
> +	mov	r4, lr		/* perserve link reg across call */
>  	bl	lowlevel_init	/* go setup pll,mux,memory */
> -	mov	lr, ip		/* restore link */
> +	mov	lr, r4		/* restore link */
>  #endif
>  	mov	pc, lr		/* back to my caller */
>  #endif /* CONFIG_SKIP_LOWLEVEL_INIT */
> 

Applied to u-boot-imx, thanks !

Best regards,
Stefano Babic

-- 
=====================================================================
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================