Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261766AbTIDOPi (ORCPT ); Thu, 4 Sep 2003 10:15:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264984AbTIDOPi (ORCPT ); Thu, 4 Sep 2003 10:15:38 -0400 Received: from fed1mtao02.cox.net ([68.6.19.243]:29421 "EHLO fed1mtao02.cox.net") by vger.kernel.org with ESMTP id S261766AbTIDOPh (ORCPT ); Thu, 4 Sep 2003 10:15:37 -0400 Date: Thu, 4 Sep 2003 07:15:35 -0700 From: Matt Porter To: "David S. Miller" Cc: Paul Mackerras , rmk@arm.linux.org.uk, hch@lst.de, torvalds@transmeta.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH] fix ppc ioremap prototype Message-ID: <20030904071535.A22822@home.com> References: <20030903203231.GA8772@lst.de> <16214.34933.827653.37614@nanango.paulus.ozlabs.org> <20030904071334.GA14426@lst.de> <20030904083007.B2473@flint.arm.linux.org.uk> <16215.1054.262782.866063@nanango.paulus.ozlabs.org> <20030904023624.592f1601.davem@redhat.com> <20030904104801.A7387@flint.arm.linux.org.uk> <16215.14133.352143.660688@nanango.paulus.ozlabs.org> <20030904060139.5ef43d71.davem@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20030904060139.5ef43d71.davem@redhat.com>; from davem@redhat.com on Thu, Sep 04, 2003 at 06:01:39AM -0700 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1053 Lines: 23 On Thu, Sep 04, 2003 at 06:01:39AM -0700, David S. Miller wrote: > On Thu, 4 Sep 2003 22:59:33 +1000 (EST) > Paul Mackerras wrote: > > > Perhaps the sensible thing is to have a separate resource tree for > > each PCI domain (actually two trees, for I/O and memory space), > > and have them contain bus addresses rather than physical addresses. > > I disagree, I think the current model where all resources are > in a global space makes more sense. The global space method doesn't allow for proper resource management in systems with a small floating physical address window but a huge bus address space to be accessed. MPC8245's DAC scheme is a good example of this as well as numerous Xscale PCI implementations. Paul's suggestion would allow the removal of lots of ugly hacks. -Matt - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/