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Date: Thu, 17 Jan 2008 15:42:22 -0500
From: Andres Salomon <dilinger@queued.net>
To: Arnd Hannemann <hannemann@i4.informatik.rwth-aachen.de>
Cc: linux-kernel@vger.kernel.org, Jordan Crouse <jordan.crouse@amd.com>
Subject: Re: 2.6.24-rc8 hangs at mfgpt-timer
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On Thu, 17 Jan 2008 20:53:57 +0100
Arnd Hannemann <hannemann@i4.informatik.rwth-aachen.de> wrote:

> Andres Salomon schrieb:
> > On Thu, 17 Jan 2008 10:54:30 +0100
> > Arnd Hannemann <hannemann@i4.informatik.rwth-aachen.de> wrote:
> > 
> >> Andres Salomon schrieb:
> >>> On Wed, 16 Jan 2008 16:19:12 -0500
> >>> Andres Salomon <dilinger@queued.net> wrote:
> >>>
> >>>> On Wed, 16 Jan 2008 18:44:07 +0100
> >>>> Arnd Hannemann <hannemann@i4.informatik.rwth-aachen.de> wrote:
> >>>>
> >>>>> Hi,
> >>>>>
> >>>>> I'm trying to boot 2.6.24-rc8 on a GEODE LX board (ALIX.3),
> >>>>> and it hangs during boot:
> >>>>>
> >>>>> [   12.689971] NET: Registered protocol family 16
> >>>>> [   12.703329] geode-mfgpt:  Registered timer 0
> >>>>> [   12.716149] mfgpt-timer:  registering the MFGT timer as a clock event...
> >>>>>
> >>>> What BIOS are you using?  It's possible that our detection code is
> >>>> failing to detect in-use timers.
> >> I'm using v0.99 (latest available).
> > 
> > 
> > v0.99 of what?  Jordan seems to think it's an Award BIOS, but I'd like
> > to make sure.
> 
> Its an ALIX board from PCEngines, they have their own BIOS
> implementation (tinyBios).
> http://www.pcengines.ch/alix.htm
> 

Ah, okay.  I couldn't find anything about MFGPTs in the available
source, but I did find the following:

http://article.gmane.org/gmane.linux.distributions.voyage.general/1824

It would appear that something between 0.90 and 0.92 changed that
has broken things.  There's also a changelog here:

http://forum.pfsense.org/index.php?topic=6729.15

Note two MFGPT-related entries in 0.92:
	
	- disable CS5536 diverse device power management to avoid
MFGPT /
	  interrupt issues.
	
	- MFGPT issues: please observe AMD CS5536 data book section
5.16.3,
	  incorrect initialization sequence can HANG the system.


I'm assuming the first is messing w/ DIVIL_GLD_MSR_PM...