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Date: Wed, 5 Nov 2008 16:15:38 -0500
From: Josh Boyer <jwboyer@linux.vnet.ibm.com>
To: Kumar Gala <galak@kernel.crashing.org>
Subject: Re: What is the maximum memory linux support for powerpc 4xx?
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Cc: linuxppc-dev@ozlabs.org, Victor Gallardo <vgallardo@amcc.com>
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On Wed, 5 Nov 2008 10:34:32 -0600
Kumar Gala <galak@kernel.crashing.org> wrote:

> 
> On Nov 5, 2008, at 9:14 AM, Victor Gallardo wrote:
> 
> > Hello,
> >
> > How can I figure out the and/or what is the maximum memory linux  
> > support for powerpc 4xx?
> 
> I'd expect the amount of memory supported to be a bit under 4G at this  
> point.  There is generic work that has been going on to allow ALL  
> ppc32's that have HW support for 36-bit physical to support >4G of  
> memory.. however that code is likely in 2.6.29.

In 4xx-specific terms, it depends on the memory controller as well.
The older SoCs only supported 2GiB in hardware I think.  The Denali
memory controller can do 16GiB in hardware from my recollection.

But you probably already knew that.

josh