On Thu, Oct 13, 2005 at 09:37:00AM +0200, Emiliano wrote:
> Alle 21:34, martedì 11 ottobre 2005, Kars de Jong ha scritto:
> > On ma, 2005-10-10 at 02:41 +0200, Emiliano wrote:
>
> > > I'm using kernel 2.4.27-amiga as found on the first CD. I guess the
> > > "fbdev" (as set in XF86Config-4) is missing from that kernel...
> >
> > I don't think that's the case, it's always present in an m68k kernel.
>
> I see.
>
> > You have a 68060, and I believe the module loader in X (XFree86 or Xorg)
> > still doesn't do cache flushing, which will cause the '060 with its 8k
> > instruction cache to fail. With other CPUs (especially a '030) things
> > usually work fine even without the cache flushes because its cache gets
> > flushed all the time anyway, and the cache is tiny anyway.
>
> Thanks for your explanation. Is there some way to turn the cache
> (temporarily)
> off?
there are better workarounds;)
- compile monolithic X server without modules, I have done
that and it works perfectly on 68060. For a production machine
a monolithic X server is in many cases preferable to module
loading anyway.
- fix module loading. Adding some cacheflush calls is really
easy once you know where to put them..
> > On my HP300 (with a '040) it manages to start X about once every ten
> > times.
>
> > Plus it's a pain to compile X.
>
> May I help with this issue? I used to be an amiga coder, I also know basics
> about linux programming on x86, so maybe I can give it a look...
>
> The best thing would be a VM inside a fast linux box, or even a
> cross-compiler
> on the x86.
one interesting way to speedup compiling is distcc.
http://distcc.samba.org/
The setup is somewhat simpler than what you would have to do
for a full crosscompiler, it is also slower as preprocessing
and configure/make runs on the 680x0.
Richard
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