From owner-freebsd-alpha Sun Jan 10 04:02:39 1999 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id EAA11532 for freebsd-alpha-outgoing; Sun, 10 Jan 1999 04:02:39 -0800 (PST) (envelope-from owner-freebsd-alpha@FreeBSD.ORG) Received: from nlsystems.com (nlsys.demon.co.uk [158.152.125.33]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id EAA11524 for ; Sun, 10 Jan 1999 04:02:36 -0800 (PST) (envelope-from dfr@nlsystems.com) Received: from localhost (dfr@localhost) by nlsystems.com (8.9.1/8.8.5) with SMTP id MAA02755; Sun, 10 Jan 1999 12:01:43 GMT Date: Sun, 10 Jan 1999 12:01:43 +0000 (GMT) From: Doug Rabson To: Wilko Bulte cc: freebsd-alpha@FreeBSD.ORG Subject: Re: porting to EB64+ / Alpine In-Reply-To: <199901091955.UAA24119@yedi.iaf.nl> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Sat, 9 Jan 1999, Wilko Bulte wrote: > As Doug Rabson wrote... > > > > sio0: type 16550A > > > sio1: reserved for low-level i/o > > > panic: possible stack overflow > > > > > > panic > > > Stopped at Debugger..ng+0x24: ldq ra,0(sp) > > > <0xfffffc0000578230> > > 698b8,sp=0xfffffc0000578230> > > > db> > > > > > > I have also seen 'panic: clock not attached'. As I'm trying to find my way > > > around in the kernel source tree I appreciate any hints. > > > > This usually happens if an interrupt is enabled but not handled. The > > interrupt exception tries to return but is immediately reentered with a > > few bytes less stack. > > Interrupts... (I did not have any interrupt mapping setup ;-) I'm trying > to get an understanding of how that works now. > > Somewhat related question: I would appreciate the output of SHOW CONF > of a genuine EB64+. My Aspen Alpine is different enough to make this > interesting. I imagine that SRM had enabled a few pci interrupts for booting and this is what was interrupting. Most of the platform code (e.g. dec_st550.c) disables all the interrupts that it doesn't know about to avoid this. -- Doug Rabson Mail: dfr@nlsystems.com Nonlinear Systems Ltd. Phone: +44 181 442 9037 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message