Software Emulation Exception...

[Jeff Millar]

Pavel was running on a virgin RPX-lite board with PCMCIA adapter and a
Sandisk flash disk plugged in.  Not on the new hardware.  So, is it a
problem with the RPX board or the Sandisk?

jeff


----- Original Message -----
From: "Dan Malek" <dan at netx4.com>
To: "Marcus Sundberg" <erammsu at kieraypc01.p.y.ki.era.ericsson.se>
Cc: "Pavel Roskin" <pavel_roskin at geocities.com>; "Wohlgemuth, Jason"
<jason_wohlgemuth at gilbarco.com>; <linuxppc-embedded at lists.linuxppc.org>
Sent: Monday, April 10, 2000 12:26 PM
Subject: Re: Software Emulation Exception...


>
> Marcus Sundberg wrote:
>
> > Well, it also happens to be typical to the MM problem solved by
> > the patches at http://www.zeta.org.au/~linsol/.....
>
> That's pretty interesting, since the Software Emulation trap is
> caused by fetching trash from memory, and the MMU changes are to
> properly track dirty data pages.  I don't buy it.  All you did
> by adding these changes was eliminate (or change) the data TLB
> miss timing.  Have you ever looked at the 8xx bus when it gets
> a TLB fault?  Pretty damn weird.  I've seen several external devices
> not behave properly because of this.
>
>
> > And by Pavel's description it's almost 100% certain that the MM
> > bug is the problem.
>
> Well, almost 100% doesn't cut it for me.  If you can't determine the
> actual cause of the problem and prove it has been corrected, it is
> still broken.
>
>
>
> -- Dan
>
>
>


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