From owner-cvs-src@FreeBSD.ORG Mon Oct 6 10:24:10 2003 Return-Path: Delivered-To: cvs-src@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C0FF916A4BF for ; Mon, 6 Oct 2003 10:24:10 -0700 (PDT) Received: from mail.speakeasy.net (mail8.speakeasy.net [216.254.0.208]) by mx1.FreeBSD.org (Postfix) with ESMTP id 77E7043FBF for ; Mon, 6 Oct 2003 10:24:07 -0700 (PDT) (envelope-from jhb@FreeBSD.org) Received: (qmail 557 invoked from network); 6 Oct 2003 17:24:06 -0000 Received: from unknown (HELO server.baldwin.cx) ([216.27.160.63]) (envelope-sender )encrypted SMTP for ; 6 Oct 2003 17:24:06 -0000 Received: from laptop.baldwin.cx (gw1.twc.weather.com [216.133.140.1]) by server.baldwin.cx (8.12.9/8.12.9) with ESMTP id h96HO4ce002267; Mon, 6 Oct 2003 13:24:04 -0400 (EDT) (envelope-from jhb@FreeBSD.org) Message-ID: X-Mailer: XFMail 1.5.4 on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: <20031006155645.19D392A8DD@canning.wemm.org> Date: Mon, 06 Oct 2003 13:24:11 -0400 (EDT) From: John Baldwin To: Peter Wemm X-Spam-Checker-Version: SpamAssassin 2.55 (1.174.2.19-2003-05-19-exp) cc: cvs-src@FreeBSD.org cc: src-committers@FreeBSD.org cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/conf ldscript.i386 src/sys/i386/i386 bios.c genassym.c locore.s machdep.c mp_machdep.c mpboot.s pmap.c src/sys/i386/include pmap.h vmparam.h X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Oct 2003 17:24:10 -0000 On 06-Oct-2003 Peter Wemm wrote: > John Baldwin wrote: >> >> On 04-Oct-2003 Peter Wemm wrote: >> > John Baldwin wrote: >> > >> >> On 01-Oct-2003 Peter Wemm wrote: >> >> > peter 2003/10/01 16:46:08 PDT >> > >> >> > Log: >> >> > Commit Bosko's patch to clean up the PSE/PG_G initialization to and >> >> > avoid problems with some Pentium 4 cpus and some older PPro/Pentium2 >> >> > cpus. There are several problems, some documented in Intel errata. >> > >> >> What does KERNBASE map to now? 4mb? >> > >> > Nope. KERNBASE is unchanged. What is different now is that the fixed 1MB >> > offset (pa = 1MB, va = KERNBASE + 1mb) is now 4MB and available via the >> > KERNLOAD variable. This becomes 2MB on a PAE configuration kernel. >> >> So does KERNBASE + foo still map to PA foo for the lower 1 meg? > > Yes, but the RAM part is readonly. The isa hole and any ram->640K hole > and address zero is read/write. There are no devices under the ram section > though, so the pmap_mapdev() tweaks for the first 1MB should be ok still. Ok. So the KERNBASE stuff is R/O and usually pmap_mapdev() maps things R/W? -- John Baldwin <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/