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Re: ip27 PCI devices

To: Ralf Baechle <ralf@linux-mips.org>
Subject: Re: ip27 PCI devices
From: "Maciej W. Rozycki" <macro@linux-mips.org>
Date: Tue, 12 Apr 2005 12:18:15 +0100 (BST)
Cc: Paul Chapman <paul.chapman@BrockU.CA>, linux-mips@linux-mips.org
In-reply-to: <20050412105815.GC5573@linux-mips.org>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <1113251422.21580.33.camel@paul.dev.brocku.ca> <20050412105815.GC5573@linux-mips.org>
Sender: linux-mips-bounce@linux-mips.org
On Tue, 12 Apr 2005, Ralf Baechle wrote:

> > I've been experimenting with trying various PCI cards I have lying
> > around in my Origin 200, to see if I can make any of them work.
> 
> The current Linux implementation limits IP27 to cards with 64-bit
> addressing capability.

 Do we have a problem with our implementation of PCI DMA masks or is the 
low 4GB of PCI address space already consumed on this system?  The problem 
is most 32-bit PCI cards unfortunately do not support DAC.

  Maciej

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