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Subject: RE: smells like hardware to me
Date: Fri, 14 Sep 2007 08:45:17 -0800
Message-ID: <BB375AF679D4A34E9CA8DFA650E2B04E0587B1E0@onstor-exch02.onstor.net>
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Thread-Topic: smells like hardware to me
Thread-Index: Acf2iKaoOAoJODgsRFqQsPgPHGYLMAABLk1Q
References: <20070913213514.167a4f46@ripper.onstor.net>
From: "Brian Stark" <brian.stark@onstor.com>
To: "Andy Sharp" <andy.sharp@onstor.com>

Andy,

First, I just want to make sure you're not trying to access physical
0xc0000000.  This points to memory that isn't populated at this point.
Since cksseg maps to 0, I don't think this is the case, but I thought
I'd point it out.

To use cksseg, you have to set the SX bit in the Status register.  We
can do this in the PROM if you want.  We typically have not used this
space for addressing, so we do not enable it by default. =20


Brian
=20

> -----Original Message-----
> From: Andy Sharp=20
> Sent: Thursday, September 13, 2007 9:35 PM
> To: Brian Stark
> Subject: smells like hardware to me
>=20
> Hi Brian,
>=20
> I think I may have bumped into a hardware-ish problem while=20
> trying to diagnose the module loading problem.  It seems that=20
> the system locks solid when it tries to access address=20
> 0xffffffffc0000000.
>=20
> This should be standard CKSSEG space on mips64 so there=20
> shouldn't be a problem.  Is it possible that there is=20
> something we're not doing quite right when setting up the=20
> 1125 wrt all the mips64 segments and so on?
> The kernel should be programming things as much as possible,=20
> but I'm wondering if there isn't something that has to be=20
> done in the setup stream or something like that.
>=20
> Any of this ring any bells?  As always, an education is=20
> appreciated if warranted ~:^)
>=20
> Cheers,
>=20
> a
>=20
