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Date: Wed, 01 Aug 2007 14:13:24 -0500
From: Scott Wood <scottwood@freescale.com>
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To: Vitaly Bordug <vitb@kernel.crashing.org>
Subject: Re: [PATCH] POWERPC 8xx: bump up initial memory limit for 8xx
References: <20070717011723.23549.44672.stgit@localhost.localdomain>
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Cc: linuxppc-dev <linuxppc-dev@ozlabs.org>, Paul Mackerras <paulus@samba.org>
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Vitaly Bordug wrote:
> From: John Traill <john.traill@freescale.com>
> 
> The 8xx can only support a max of 8M during early boot ( it seems a lot of
> 8xx boards only have 8M so the bug was never triggered ). The following
> change makes it able to run with 128M.
> 
> Signed-off-by: Vitaly Bordug <vitb@kernel.crashing.org>
> 
> ---
> 
>  arch/powerpc/mm/init_32.c |    3 +++
>  1 files changed, 3 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
> index e1f5ded..7cee86d 100644
> --- a/arch/powerpc/mm/init_32.c
> +++ b/arch/powerpc/mm/init_32.c
> @@ -133,6 +133,9 @@ void __init MMU_init(void)
>  	/* 601 can only access 16MB at the moment */
>  	if (PVR_VER(mfspr(SPRN_PVR)) == 1)
>  		__initial_memory_limit = 0x01000000;
> +	/* 852 can only access 8MB at the moment */
> +	if (PVR_VER(mfspr(SPRN_PVR)) == 0x50)
> +		__initial_memory_limit = 0x00800000;

The comment should refer to 8xx, not 852, as this is a property of code 
in head_8xx.S and not the chip itself.

Otherwise,
Acked-by: Scott Wood <scottwood@freescale.com>

-Scott