mtmsr...

[Matt Porter]

On Wed, Sep 26, 2001 at 08:47:12PM -0400, Dan Malek wrote:
> Matt Porter wrote:
>
> > Force's PowerBoot doesn't properly clean up caches before handing
> > control over to an external program.  You are probably having
> > cache problems that we have run into on some COTS Force boards.
> > I had to disable, flush, reenable L1 icache on the 680/G4, for
> > example.
>
> So, you are really running on luck then.  When you disable the

Absolutely, we are running on luck.

> cache, you are just fortunate that the necessary instructions
> to do the remainder of the work just happen to be in main memory,
> and that the cache was somehow implicitly invalidated so the ones
> you need to get to this point aren't stale in the cache.  Are
> you really sure the caches aren't cleaned up properly and this
> sequence of operations isn't masking some other problem?

I understand it's dangerous but it did limp around whatever the
root problem is.  It could be masking another problem...this
is a problem awaiting someone with time to understand it.

--
Matt Porter
MontaVista Software, Inc.
mporter at mvista.com

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