From owner-freebsd-hackers@FreeBSD.ORG Thu Apr 10 12:38:16 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 BB9E637B405 for ; Thu, 10 Apr 2003 12:38:16 -0700 (PDT) Received: from falcon.midgard.homeip.net (h76n3fls20o913.telia.com [213.67.148.76]) by mx1.FreeBSD.org (Postfix) with SMTP id 07F4943F85 for ; Thu, 10 Apr 2003 12:38:14 -0700 (PDT) (envelope-from ertr1013@student.uu.se) Received: (qmail 52077 invoked by uid 1001); 10 Apr 2003 19:38:11 -0000 Date: Thu, 10 Apr 2003 21:38:10 +0200 From: Erik Trulsson To: Julian Stacey Message-ID: <20030410193810.GA52024@falcon.midgard.homeip.net> Mail-Followup-To: Julian Stacey , freebsd-hackers@freebsd.org, Michael Elbel References: <200304101843.h3AIh4C65481@flip.jhs.private> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200304101843.h3AIh4C65481@flip.jhs.private> User-Agent: Mutt/1.5.4i cc: freebsd-hackers@freebsd.org cc: Michael Elbel Subject: Re: Anyone seen 4.8-RELEASE running on a real 386 (not 486 586 etc) ? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Apr 2003 19:38:17 -0000 On Thu, Apr 10, 2003 at 08:43:04PM +0200, Julian Stacey wrote: > freebsd-hackers@, > Anyone seen 4.8-RELEASE running on a real 386 processor (not a 486, 586 etc) ? > > I have a 386 that runs 4.7, dmesg below, both GENERIC & my own kernel; > But it wont boot 4.8 { either generic or my own config } compiled on my > other 4.8 box. I tried making with & without /etc/make.conf > CFLAGS = -m386 -march=i386 -msoft-float -mcpu=i386 -O -pipe > COPTFLAGS= -m386 -march=i386 -msoft-float -mcpu=i386 -O -pipe > I tried the /kernel copied from a 4.8 cdrom to hard disk (no cdrom > drive on the box). I tried 4.8 boot floppies (to prove its not > something wrong in hard disc /boot) Every 4.8 kernel crashes during boot -s. > > This 386 box is no bigger than a book, so worth persevering :-) > "SX 33" is written on chip, though dmesg reports "DX". > > I recall 386 support was dropped in 5.0, but presume not dropped in 4.8, > ( I don't see any signs in /usr/share/mk comparing 4.7 & 4.8 ) > The 4.8 cdrom /[A-Z]* files say i386 is still supported. > > I removed the only card in the box (a 3com ISA ethernet jumperless) - > it still wouldnt boot, so put ethernet card back in, as not the problem. > > I compiled a kernel with ddb, Results copied by hand as no serial for > remote gdb.t present > > Ideas or solutions anyone ? > > 4.8 ddb: > Fatal trap 1: priveleged instruction fault while in kernel mode > instruction pointer = 0x8:0xc02695a0 > stack pointewr = 0x10:0xc0379fcc > frame pointer = 0x10:0xc0379fcc > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, def 32 1, gran 1 > processor eflags = interrupt enabled, resume, IOPL = 0 > current process = Idle > interrupt mask = net tty bio cam > kernel: type 1 trap, code=0 > stopped at 0xc02695a0: invlpg 0(%ecx) Try the following patch. Makes my 386sx/33 work fine at least. (Without it I get the same panic as you do.) =================================================================== RCS file: /ncvs/src/sys/i386/i386/identcpu.c,v retrieving revision 1.80.2.14 diff -u -r1.80.2.14 identcpu.c --- sys/i386/i386/identcpu.c 22 Jan 2003 20:14:52 -0000 1.80.2.14 +++ sys/i386/i386/identcpu.c 13 Mar 2003 14:55:52 -0000 @@ -80,7 +80,7 @@ static void print_transmeta_info(void); static void setup_tmx86_longrun(void); -int cpu_class; +int cpu_class=CPUCLASS_386; u_int cpu_exthigh; /* Highest arg to extended CPUID */ u_int cyrix_did; /* Device ID of Cyrix CPU */ char machine[] = "i386"; -- Erik Trulsson ertr1013@student.uu.se