Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262015AbTEMQJa (ORCPT ); Tue, 13 May 2003 12:09:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262144AbTEMQJR (ORCPT ); Tue, 13 May 2003 12:09:17 -0400 Received: from palrel12.hp.com ([156.153.255.237]:8354 "EHLO palrel12.hp.com") by vger.kernel.org with ESMTP id S262015AbTEMQH5 (ORCPT ); Tue, 13 May 2003 12:07:57 -0400 From: David Mosberger MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <16065.6969.137647.391163@napali.hpl.hp.com> Date: Tue, 13 May 2003 09:20:09 -0700 To: Ivan Kokshaysky Cc: davidm@hpl.hp.com, "Wiedemeier, Jeff" , =?iso-8859-1?Q?Michel_D=E4nzer?= , Dave Jones , linux-kernel@vger.kernel.org, dri-devel@lists.sourceforge.net Subject: Re: Improved DRM support for cant_use_aperture platforms In-Reply-To: <20030513173347.A25865@jurassic.park.msu.ru> References: <16062.37308.611438.5934@napali.hpl.hp.com> <20030511195543.GA15528@suse.de> <1052690133.10752.176.camel@thor> <16063.60859.712283.537570@napali.hpl.hp.com> <1052768911.10752.268.camel@thor> <16064.453.497373.127754@napali.hpl.hp.com> <1052774487.10750.294.camel@thor> <16064.5964.342357.501507@napali.hpl.hp.com> <1052786080.10763.310.camel@thor> <16064.17852.647605.663544@napali.hpl.hp.com> <20030513173347.A25865@jurassic.park.msu.ru> X-Mailer: VM 7.07 under Emacs 21.2.1 Reply-To: davidm@hpl.hp.com X-URL: http://www.hpl.hp.com/personal/David_Mosberger/ Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1544 Lines: 40 >>>>> On Tue, 13 May 2003 17:33:47 +0400, Ivan Kokshaysky said: Ivan> On Mon, May 12, 2003 at 06:09:16PM -0700, David Mosberger Ivan> wrote: >> OK, I believe the only other architecture that sets >> "cant_use_aperture" is Alpha. Ivan> Note that some Alphas may have "cant_use_aperture" cleared. "Interesting". Ivan> I mean Nautilus - unfortunate product of Athlon northbridge Ivan> and EV6 interbreeding... I've just managed to get agpgart Ivan> working to some degree on one of these beasts (UP1500), but Ivan> with so many ugly and fragile hacks that I'm not sure that I Ivan> ever want to submit this. ;-) If cant_use_aperture isn't set, my patch won't help, but it shouldn't hurt anything either. I.e., you should be no worse off than before. What's the nature of those "ugly and fragile" hacks? Are you saying that CPU accesses to AGP space aren't remapped in the "normal" (PC) way? Or is it something entirely different? >> I asked some Alpha folks several months ago about my patch, but >> never got a conclusive answer. IIRC, on Alpha the physical >> address itself determines cacheablity. If so, we can use >> PAGE_KERNEL (which is universal) instead of PAGE_KERNEL_NOCACHE. Ivan> Yes. Thanks for confirming. --david - 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/