2.6.10-rc3 does not boot on PowerMac

[Benjamin Herrenschmidt]

On Sun, 2004-12-05 at 16:56 +0100, Andreas Schwab wrote:
> Benjamin Herrenschmidt <benh at kernel.crashing.org> writes:
> 
> > That is very strange ... it looks like the video card is beeing remapped
> > to a different location than where it was initially. Can you send me the
> > dmesg log ? Is this an nvidia or an ATI card ? Does either rivafb or
> > radeonfb work ?
> 
> It's an nvidia card, but it is not supported by rivafb (pci id 10de:0321).
> I have attached /proc/iomem and dmesg output for both 2.6.9 and 2.6.10-rc3.

The dmesg doesn't contain anything useful apparently. For some reason,
the nVidia card is getting moved around by the PCI code it seems (lspci
-vv would probably show you that it gets re-assigned a different
location).

It's absolutely bad if the kernel starts doing that to cards that are
already located to valid addresses. The MacIO (K2) chip itself for
example is a PCI device and must _never_ be moved around or the kernel
will die right away.

It would be useful to enable some PCI debugging to figure out what's
going on there.

Ben.