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Date:      Thu, 05 Mar 2009 12:00:22 -0600
From:      Robert Noland <rnoland@FreeBSD.org>
To:        Martin Cracauer <cracauer@cons.org>
Cc:        Marcel Moolenaar <xcllnt@mac.com>, freebsd-current@freebsd.org
Subject:   Re: Serial console options
Message-ID:  <1236276022.1384.54.camel@widget.2hip.net>
In-Reply-To: <20090305175245.GA76821@cons.org>
References:  <20090305155721.GA70584@cons.org> <A0E42D0E-43D2-4D34-B763-F9A21A5D0837@mac.com> <20090305175245.GA76821@cons.org>

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On Thu, 2009-03-05 at 12:52 -0500, Martin Cracauer wrote:
> Marcel Moolenaar wrote on Thu, Mar 05, 2009 at 08:39:45AM -0800:=20
> >=20
> > On Mar 5, 2009, at 7:57 AM, Martin Cracauer wrote:
> >=20
> > >I finally have enough FreeBSD hardware piled up have things
> > >crossconnected with serial consoles.
> > >
> > >One question, though: one machine has a serial port capable BIOS.  If
> > >I use this, is there a way to do kgdb debugging over that connection?
> > >
> > >I think the real question is: if I use the serial port for the BIOS,
> > >will it be available as a port in FreeBSD?
> >=20
> > What does it mean when you say "the serial port for the BIOS"?
> >
> > To give an answer to an imagined question:
> > You can use the same serial port as both a console and a debug port.
>=20
> Using the serial port for the mainboard's BIOS might or might not
> disable it's use for console or debugging, that was my question.

Most of the boxes that I have seen that offer a serial console option in
BIOS, also offer an option to disable console redirection after the BIOS
segment.  This should get you console (BIOS managed) during the BIOS
load, then FreeBSD will take over once the loader is up.

robert.

> Martin
--=20
Robert Noland <rnoland@FreeBSD.org>
FreeBSD

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