From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Kumar Gala <galak@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org, "Régis Odeyé" <regis.odeye@kontron.com>
Subject: Re: Extended Addressing Mode
Date: Thu, 23 Oct 2008 09:11:46 +1100 [thread overview]
Message-ID: <1224713506.7654.353.camel@pasglop> (raw)
In-Reply-To: <88C8EDEB-C9A5-4876-AF7D-55CBABBE111D@kernel.crashing.org>
On Wed, 2008-10-22 at 08:08 -0500, Kumar Gala wrote:
> > We are developing a board based on Freescale 8641D which can get
> 4GB
> > of ram. So I need 4GB+IOs (~1GB) of physical addressing space.
> > My plan is to put a part of this ram above of 4GB to keep accesses
> > to the IOs below the 4GB limit. It means non-contiguous ram
> > addressing and XAEN features to be working.
Why would you put the IOs below the 4G point ? It's actually easier
to have the IOs up above, like a lot of 4xx do.
Cheers,
Ben.
next prev parent reply other threads:[~2008-10-22 22:12 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-22 8:59 Extended Addressing Mode Régis Odeyé
2008-10-22 12:31 ` Kumar Gala
2008-10-22 12:59 ` Régis Odeyé
2008-10-22 13:08 ` Kumar Gala
2008-10-22 13:40 ` Régis Odeyé
2008-10-22 13:42 ` Matt Sealey
2008-10-22 14:06 ` Kumar Gala
2008-10-22 14:19 ` Matt Sealey
2008-10-22 14:58 ` Kumar Gala
2008-10-22 18:11 ` Matt Sealey
2008-10-22 19:59 ` Becky Bruce
2008-10-22 22:18 ` Matt Sealey
2008-10-22 14:22 ` Matt Sealey
2008-10-22 14:59 ` Kumar Gala
2008-10-22 18:25 ` Matt Sealey
2008-10-22 14:18 ` Régis Odeyé
2008-10-22 22:11 ` Benjamin Herrenschmidt [this message]
2008-10-22 22:21 ` Matt Sealey
2008-10-22 22:48 ` Benjamin Herrenschmidt
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