From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 8 Jun 2001 17:01:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 8 Jun 2001 17:01:30 -0400 Received: from neon-gw.transmeta.com ([209.10.217.66]:53512 "EHLO neon-gw.transmeta.com") by vger.kernel.org with ESMTP id ; Fri, 8 Jun 2001 17:01:19 -0400 To: linux-kernel@vger.kernel.org From: "H. Peter Anvin" Subject: Re: [patch] 32-bit dma memory zone Date: 8 Jun 2001 14:00:54 -0700 Organization: Transmeta Corporation, Santa Clara CA Message-ID: <9free6$lk4$1@cesium.transmeta.com> In-Reply-To: <20010607153119.H1522@suse.de> <20010607145912.B2286@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Disclaimer: Not speaking for Transmeta in any way, shape, or form. Copyright: Copyright 2001 H. Peter Anvin - All Rights Reserved Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Followup to: By author: ebiederm@xmission.com (Eric W. Biederman) In newsgroup: linux.dev.kernel > > The AMD760 which looks like it might walk on both the alpha, an x86 > side of the fence also has an iommu. Mostly it's used for AGP but > according to the docs it should be able to handle the other cases as > well. The only downside is that it only supports 4GB of ram... > > Anyway we shouldn't assume iommu's don't exist on x86. > On most chips the AGP GART isn't just limited to AGP; it's a full-fledged iommu. The main problem with it is that it is usually a rather limited space it provides. -hpa -- at work, in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt