[U-Boot] [PATCH v3] ppc4xx: Add GDsys CompactCenter board support.

[Stefan Roese]

On Tuesday 14 July 2009 14:31:50 Eibach, Dirk wrote:
> > > Hmm, not sure yet what causes the problem here, but this changes in
> > > cpu/ppc4xx/start.S look fishy...
>
> I found that the old code does not clear TLB entry #0.
> So this helps in my case:

Yes, I already generated exactly this patch here as well. :)

> diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S
> index ac96fc2..7be73a7 100644
> --- a/cpu/ppc4xx/start.S
> +++ b/cpu/ppc4xx/start.S
> @@ -452,7 +452,7 @@ skip_debug_init:
>         addis   r0,0,0x0000
>         li      r1,0x003f       /* 64 TLB entries */
>         mtctr   r1
> -       li      r4,0            /* Start with TLB #0 */
> +       li      r4,1            /* Start with TLB #1 */
>  rsttlb:
>  #ifdef CONFIG_SYS_RAMBOOT
>         tlbre   r3,r4,0         /* Read contents from TLB word #0 to get
> EPN */
>
> But I am not sure if it's also correct for the RAMBOOT case. What's your
> opinion, Stefan?

Unfortunately, RAM-booting on Sequoia doesn't work in all cases (started via 
BDI) on Sequoia with this patch. I'm still investigating...

Best regards,
Stefan

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