From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263160AbTDWMQM (ORCPT ); Wed, 23 Apr 2003 08:16:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263967AbTDWMQM (ORCPT ); Wed, 23 Apr 2003 08:16:12 -0400 Received: from mail.gmx.de ([213.165.65.60]:62199 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S263160AbTDWMQM convert rfc822-to-8bit (ORCPT ); Wed, 23 Apr 2003 08:16:12 -0400 Content-Type: text/plain; charset=US-ASCII From: Andrew Kirilenko To: linux-kernel@vger.kernel.org Subject: Re: Data storing Date: Wed, 23 Apr 2003 15:28:08 +0300 User-Agent: KMail/1.4.3 References: <200304231459.37955.icedank@gmx.net> In-Reply-To: MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Message-Id: <200304231528.08720.icedank@gmx.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello! > > I need to make some checks (search for particular BIOS version) in the > > very start of the kernel. I need to store this data (zero page is pretty > > good for this, I think) and access it from arch/i386/boot/setup.S, > > arch/i386/boot/compressed/misc.c and in some other places. Can somebody > > suggest me good place to put check procedure and how to pass data? > > I use 0x000001f0 (absolute) for relocating virtual disk code > for booting embedded systems. After Linux is up, the code remains > untouched. This might be a good location because the BIOS doesn't > use it during POST/boot and Linux (currently) leaves it alone. > Of course, this doesn't mean that somebody will not destroy this > area in the future (probably to spite you and me!!!). Yes, I know about this area, as I wrote (Documentation/i386/zero-page.txt). And I even know how to pass parameter from zero-page into kernel space (setup.c). But I need to use this parm, I fetched, in both setup.S and misc.c (see below). And I don't have any ideas about execute order of setup.S, misc.c and setup.c. Best regards, Andrew.