From owner-freebsd-alpha  Sat Jan  9 14:31:00 1999
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From: Wilko Bulte <wilko@yedi.iaf.nl>
Message-Id: <199901091955.UAA24119@yedi.iaf.nl>
Subject: Re: porting to EB64+ / Alpine
In-Reply-To: <Pine.BSF.4.01.9901091253270.391-100000@herring.nlsystems.com> from Doug Rabson at "Jan 9, 99 12:57:13 pm"
To: dfr@nlsystems.com (Doug Rabson)
Date: Sat, 9 Jan 1999 20:55:44 +0100 (CET)
Cc: freebsd-alpha@FreeBSD.ORG
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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>   <ra=0xfffffc00004
> > 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.

Wilko
_     ______________________________________________________________________
 |   / o / /  _  Bulte 				  email: wilko@yedi.iaf.nl 
 |/|/ / / /( (_) Arnhem, The Netherlands          WWW  : http://www.tcja.nl
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