Subject: Re: PCI IO range limitation

From: Matt Sealey <[email-masked]>
Date: Fri, 29 Jun 2007 00:38:58 +0100

Benjamin Herrenschmidt wrote:
> On Thu, 2007-06-28 at 12:20 +0200, Marian Balakowicz wrote:
>> Hi,
>>
>> Trying to change PCI IO window base for 52xx target I found that
>> we are pretty much limited to a "0" offset only.
> 
> We just fixed that for 64 bits but 32 bits still has the limitation.
> Note that it's not a very good idea to have your IO range at !0 if
> you're going to use anything ISA-like, such as a VGA video card or other
> legacy devices behind a PCI southbridge or SuperIO.

The chances of that on an MPC52xx platform are practically zero, aren't
they?

-- 
Matt Sealey <[email-masked]>
Genesi, Manager, Developer Relations