Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261257AbVBZSw3 (ORCPT ); Sat, 26 Feb 2005 13:52:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261259AbVBZSw3 (ORCPT ); Sat, 26 Feb 2005 13:52:29 -0500 Received: from vms040pub.verizon.net ([206.46.252.40]:39902 "EHLO vms040pub.verizon.net") by vger.kernel.org with ESMTP id S261257AbVBZSwY (ORCPT ); Sat, 26 Feb 2005 13:52:24 -0500 Date: Sat, 26 Feb 2005 11:08:21 -0800 From: Bukie Mabayoje Subject: Re: EBDA Question To: "H. Peter Anvin" Cc: linux-kernel@vger.kernel.org Message-id: <4220C925.59995262@gte.net> MIME-version: 1.0 X-Mailer: Mozilla 4.78 [en] (WinNT; U) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit X-Accept-Language: en References: <91888D455306F94EBD4D168954A9457C01297B87@nacos172.co.lsil.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1591 Lines: 45 "H. Peter Anvin" wrote: > Followup to: <91888D455306F94EBD4D168954A9457C01297B87@nacos172.co.lsil.com> > By author: "Moore, Eric Dean" > In newsgroup: linux.dev.kernel > > > > EBDA - Extended Bios Data Area > > > > Does Linux and various boot loaders(lilo/grub/etc) > > having any restrictions on where and how big > > memory allocated in EBDA is? Is this > > handled for 2.4/2.6 Kernels? > > > > Reason I ask is we are considering having > > BIOS(for a SCSI HBA Controller) allocating > > memory in EBDA for Firmware use. > > We are concerned whether Linux would be writing > > over this region of memory during the handoff > > of BIOS to scsi lower layer driver loading. > > > > In general, dropping the EBDA below 0x9a000 is probably a > bad idea. Recent Linux kernels and boot loaders should handle it, > though. Keep in mind that you might find yourself in serious trouble > if you then have, for example, a PXE stack layered on top of your SCSI > BIOS. There are test software used in manufacturing line that needs this DOS memory. > > > -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/ - 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/