Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936223AbXLQW5f (ORCPT ); Mon, 17 Dec 2007 17:57:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757531AbXLQW5Z (ORCPT ); Mon, 17 Dec 2007 17:57:25 -0500 Received: from terminus.zytor.com ([198.137.202.10]:59643 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757175AbXLQW5Y (ORCPT ); Mon, 17 Dec 2007 17:57:24 -0500 Message-ID: <4766FDC9.4040806@zytor.com> Date: Mon, 17 Dec 2007 14:52:57 -0800 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.9 (X11/20071115) MIME-Version: 1.0 To: Jan Engelhardt CC: Alan Cox , "David P. Reed" , Pavel Machek , Ingo Molnar , Thomas Gleixner , linux-kernel@vger.kernel.org, Ingo Molnar , Rene Herman Subject: Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc. References: <469578CD.3080609@reed.com> <1184216528.12353.203.camel@chaos> <1184218962.12353.209.camel@chaos> <46964352.7040301@reed.com> <1184253339.12353.223.camel@chaos> <469697C6.50903@reed.com> <1184274754.12353.254.camel@chaos> <4761F193.7090400@reed.com> <20071214131502.GA14359@elte.hu> <4762C551.5070003@zytor.com> <20071214210652.GB28793@elf.ucw.cz> <4763001A.1070102@zytor.com> <20071214232955.545ab809@the-village.bc.nu> <4763442A.5020507@reed.com> <476369E2.8050301@zytor.com> <47640C33.1050106@reed.com> <20071215174658.5d784075@the-village.bc.nu> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 822 Lines: 21 Jan Engelhardt wrote: > On Dec 15 2007 17:46, Alan Cox wrote: >>> My understanding is that the linux starts in real mode, and uses the >>> BIOS for such things as reading the very first image. >> Not always. We may enter from 32bit in some cases, and we may also not >> have a PC BIOS in the first place. > > Computers without a PC BIOS (I'm trying to think of something, e.g. > the typical SUN sparc64 box) should have other means of accessing a > clocksource, no? We were talking about x86 here, though. Even on x86 we sometimes run from the 32-bit entrypoint. -hpa -- 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/