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Date:      Thu, 13 Oct 2005 06:40:45 +1000
From:      Peter Grehan <grehan@freebsd.org>
To:        John Baldwin <jhb@freebsd.org>
Cc:        freebsd-ppc@freebsd.org
Subject:   Re: Panic on boot from CD
Message-ID:  <434D74CD.4020103@freebsd.org>
In-Reply-To: <200510121553.14347.jhb@freebsd.org>
References:  <001901c5cab0$5b047200$13b46743@TIM> <4349F8D9.4070209@freebsd.org> <200510121553.14347.jhb@freebsd.org>

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> Perhaps something is trying to do a mtx_init() or mtx_destroy() before 
> mutex_init() has been called?

  I *think* it's due to the fact that I'm not saving/restoring the 
SPRG0-3 registers when calling into OpenFirmware. It only shows up when 
you boot holding down the 'C' key, but works fine when dropping into 
OpenFirmware and manually booting. There's a similar problem on the B&W 
G3 when booting from the ATA drive.

  The panic message is related to memory corruption that occurrs - a 
mutex is getting zeroed.

later,

Peter.




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