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Date:      Thu, 27 Feb 2003 13:34:13 +0200
From:      Ruslan Ermilov <ru@freebsd.org>
To:        Geoffrey <geoffrey@reptiles.org>
Cc:        Juli Mallett <jmallett@freebsd.org>, Poul-Henning Kamp <phk@critter.freebsd.dk>, current@freebsd.org
Subject:   Re: Any ideas why we can't even boot a i386 ?
Message-ID:  <20030227113413.GD39346@sunbay.com>
In-Reply-To: <20030227112755.GC39346@sunbay.com>
References:  <20030227042706.A67762@FreeBSD.org> <20030227052926.G28626-100000@iguana.reptiles.org> <20030227112755.GC39346@sunbay.com>

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On Thu, Feb 27, 2003 at 01:27:55PM +0200, Ruslan Ermilov wrote:
> On Thu, Feb 27, 2003 at 05:35:13AM -0500, Geoffrey wrote:
> > On Thu, 27 Feb 2003, Juli Mallett wrote:
> >=20
> > > * De: Poul-Henning Kamp <phk@critter.freebsd.dk> [ Data: 2003-02-27 ]
> > > 	[ Subjecte: Any ideas why we can't even boot a i386 ? ]
> > > > 	Yup.  386dx - 33Mhz.  Results below:
> > > >
> > > > 	Loaded kern.flp, mfsroot.flp, prompted for boot, then core dumped
> > > > as follows:
> > >
> > > Was this normal release?  I thought I recalled a convo resulting in
> > > the decision that 386 would require special release bits?
> >=20
> > 	Yes, it was from release floppies written a couple of weeks ago.
> > In fairness, it might not like my scsi host adapter (Adaptec 1542CF).  =
Or
> > there may be an issue with the size of the drive (HP C2490 - 2 GB).  The
> > bios only supports one controller so fitting enough IDE drives for src,
> > obj, usr and swap wasn't an option.
> >=20
> : RCS file: /home/ncvs/src/sys/i386/conf/GENERIC,v
> : Working file: GENERIC
> : head: 1.376
> : branch:
> : locks: strict
> : access list:
> : keyword substitution: kv
> : total revisions: 508;   selected revisions: 1
> : description:
> : ----------------------------
> : revision 1.296
> : date: 2001/01/14 10:11:10;  author: jhb;  state: Exp;  lines: +2 -2
> : Remove I386_CPU from GENERIC.  Support for the 386 seriously pessimizes
> : performance on other x86 processors.  Custom kernels can still be built
> : that will run on the 386.
> : =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D
>=20
Also in src/UPDATING:

: 20010116:
:         The kernel option I386_CPU is now mutually exclusive with the
:         other cpu types. If you have an i386 system, be sure that it
:         only had this line.  Remove it for all other configurations.

Also in FreeBSD/i386 5.0-RELEASE Release Notes:

:   2.1.1 Processor/Motherboard Support
:=20
[...]
:    Support for the 80386 processor has been removed from the GENERIC
:    kernel, as this code seriously pessimizes performance on other
:    IA32 processors. The I386_CPU kernel option to support the 80386
:    processor is now mutually exclusive with support for other IA32
:    processors; this should slightly improve performance on the 80386
:    due to the elimination of runtime processor type checks. Custom
:    kernels that will run on the 80386 can still be built by changing
:    the CPU options in the kernel configuration file to only include
:    I386_CPU.


Cheers,
--=20
Ruslan Ermilov		Sysadmin and DBA,
ru@sunbay.com		Sunbay Software AG,
ru@FreeBSD.org		FreeBSD committer,
+380.652.512.251	Simferopol, Ukraine

http://www.FreeBSD.org	The Power To Serve
http://www.oracle.com	Enabling The Information Age

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