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Re: Any O2 R10K patches I should try?
> > My first attempts have been with R10K O2s. I can boot then with
> > the latest -current. But networking will cause these machines to
> > reset after only 15-20 seconds. cvs, ftp and scp have been tried.
> > I've checked the mailing list archives, but don't see this addressed
> > particularly in the last few months.
> I have an r5k O2, mec works just fine - I'd suspect the r10k needs
> some additional cache flushes / invalidates. An off the shelf PCI
> ethernet card might do the trick too.
The problem is not in R10000 itself, but
SGI's non-coherent cache hardware design:
I'm afraid hacking on complicated workaround for
such stupid ;-p hardware design would be a bit boring...
> > I've also noticed the R10Ks don't recognize memory over 256M. Is this
> > still a limitation in the port for O2s?
> That's still a limitation on all O2 variants, although there might be
> a way to access an additional 512MB without going LP64.
It's current NetBSD/mips pmap limitation. On O2 only 256MB RAM
is mapped at 0x0-0x10000000 for compatibility, and whole RAM is
mapped at higher address which can't be accessed via KSEG0,
and current mips pmap can't handle such memory.
Maybe we should take a look at OpenBSD/mips64..
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