Trying a Promise Ultra/66 on powerpc

Geert Uytterhoeven Geert.Uytterhoeven at
Mon Aug 9 06:52:58 EST 1999

On Sun, 8 Aug 1999, Michel Lanners wrote:
> On  29 Jul, this message from Benjamin Herrenschmidt echoed through cyberspace:
> > On Wed, Jul 28, 1999, Michel Lanners <mlan at> wrote:
> > 
> >>It seems that OpenFirmware is not doing its job well in initializing all
> >>PCI devices.For the planb driver, which uses an onboard PCI device
> >>(video input) known to OF (i.e Apple device), I need to set
> >>it just a problem with IO space enabling, and memory is already
> >>switched on by OF?
> > 
> > OF will not enable memory space if there's no OF boot code on the board.
> > I beleive it doesn the same with IO space (but I didn't check). The lack
> > of PCI_COMMAND_INVALIDATE can be considered as an OF bug if the card
> > already has PCI_COMMAND_MASTER set as a default. I think the kernel
> > should add this to all devices at fixup time. (It should be harmless for
> > non-master devices anyway).
> Right, according to 'Designing PCI cards and Drivers..', OF never
> enables neither memory space, nor IO space, neither ROM. It should,
> didn't chek, though...
> I'm getting a patch ready that fixes this on the PMac plkatform. Geert,
> how about OF in your CHRP box? Does it need the enable fix as well?

Yep, my OF neither enables memory spaces on devices it doesn't have a driver
for. It even doesn't allocate space to them.



Geert Uytterhoeven                     Geert.Uytterhoeven at
Wavelets, Linux/{m68k~Amiga,PPC~CHRP}
Department of Computer Science -- Katholieke Universiteit Leuven -- Belgium

[[ This message was sent via the linuxppc-dev mailing list.  Replies are ]]
[[ not  forced  back  to the list, so be sure to Cc linuxppc-dev if your ]]
[[ reply is of general interest. Please check ]]
[[ and for useful information before posting.   ]]

More information about the Linuxppc-dev mailing list