[PATCH 1/3] ARM v7: Fix broken mmu initialization

[Sascha Hauer]

Eric,

This could well be the cause of your i.MX51 mmu trouble.

Sascha

On Mon, Mar 07, 2011 at 07:01:06PM +0100, Sascha Hauer wrote:
> The armv7 specific __mmu_cache_on function accidently sets
> the page table pointer with the unitialized value of r3. It seems
> that often enough r3 still held the correct value from a previous
> call to mmu_init allowing this bug to remain uncovered for longer.
> 
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> ---
>  arch/arm/cpu/cache-armv7.S |    1 -
>  1 files changed, 0 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/arm/cpu/cache-armv7.S b/arch/arm/cpu/cache-armv7.S
> index 79bc243..538ab28 100644
> --- a/arch/arm/cpu/cache-armv7.S
> +++ b/arch/arm/cpu/cache-armv7.S
> @@ -20,7 +20,6 @@ ENTRY(__mmu_cache_on)
>  #endif
>  		orrne	r0, r0, #1		@ MMU enabled
>  		movne	r1, #-1
> -		mcrne	p15, 0, r3, c2, c0, 0	@ load page table pointer
>  		mcrne	p15, 0, r1, c3, c0, 0	@ load domain access control
>  #endif
>  		mcr	p15, 0, r0, c1, c0, 0	@ load control register
> -- 
> 1.7.2.3
> 
> 

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