From owner-freebsd-hackers@FreeBSD.ORG Mon Jun 9 04:47:58 2003 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4683A37B401 for ; Mon, 9 Jun 2003 04:47:58 -0700 (PDT) Received: from gatorzone.com (gatormail.gatorzone.com [216.53.131.133]) by mx1.FreeBSD.org (Postfix) with ESMTP id 76AE343F75 for ; Mon, 9 Jun 2003 04:47:57 -0700 (PDT) (envelope-from cd_freebsd@gatorzone.com) Date: Mon, 9 Jun 2003 07:52:33 -0400 Message-Id: <200306090752.AA157221012@gatorzone.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii From: "cd_freebsd" To: X-Mailer: Subject: Re: Mapping Physical Memory without a Device? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: cd_freebsd@gatorzone.com List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Jun 2003 11:47:58 -0000 jmallett@freebsd.org writes >> You may also want to consider pmap_map. It depends on what your >>requirements are? while Bruce M Simpson [bms@spc.org] writes >>It's quite evil and not machine independent..avoid. -Who is right? (I like Juli's answer and she has FreeBSD.org in her name :) ) -Why is pmap_mapdev bad? -What makes it machine dependent? -What is the difference between pmap_devmap and pmap_map? My requirements would be to map some or all of the following memory areas that are not associated with any device I own: 1) BIOS & UMB ram (0xC0000-0xFFFFF) 2) VGA Video buffer (0xA0000-0xBFFFF) 3) Video Frame buffer (0x????0000-0x????0000)