From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTP id B95B3DDEEF for ; Fri, 29 Jun 2007 10:13:25 +1000 (EST) Subject: Re: PCI IO range limitation From: Benjamin Herrenschmidt To: Matt Sealey In-Reply-To: <46844692.1040804@genesi-usa.com> References: <46838B54.2010806@semihalf.com> <1183052634.5521.284.camel@localhost.localdomain> <46844692.1040804@genesi-usa.com> Content-Type: text/plain Date: Fri, 29 Jun 2007 10:13:16 +1000 Message-Id: <1183075997.5521.292.camel@localhost.localdomain> Mime-Version: 1.0 Cc: linuxppc-dev@ozlabs.org, Marian Balakowicz List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Fri, 2007-06-29 at 00:38 +0100, Matt Sealey wrote: > 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? Euh... don't you use VGA video cards on Efika ? :-) Ben.