> > Joakim Tjernlund wrote:
> >
> > > It seems that even the newest 8xx chips still has problems. I did not
> > > expect that.
> >
> > It may be the parts are working fine. I long ago removed the code necessary
> > to detect the exception conditions when the cache instructions faulted, so
> > I wouldn't expect them to work properly.
>
> Aah, that would explain why __copy_tofrom_user doesn't work I guess. But the
> rest seems to be fine. Maybe there should be a new config option that
> would one could enable for modern 8xx CPUs? With a big warning sign of cource
> and default to off. Maybe even add the missing exception handler?
>
> Jocke
Dan, could you add the missing code for 8xx to detect the exception conditions
when
the cache instructions faulted? I would like to give it a try.
Maybe add a new CONFIG option to allow 8xx to use these optimizations when
explicitly enabled. Perhaps it's enough to let it depend on CONFIG_8xx_CPU6,
that is,
if CONFIG_8xx_CPU6 is set do NOT enable dcbz et. all, otherwise enable them?
Jocke
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