Re: Multiple PCI busses (WAS:Re: performance downgrade on PowerPC)

From: Geert Uytterhoeven (geert@linux-m68k.org)
Date: Fri Jun 23 2000 - 15:20:20 EST

On Fri, 23 Jun 2000, Michael Schmitz wrote:
> > the kernel really knows what do they mean. As far as I understand,
> > except for working around bugs like S3 cards reporting bogus region
> > sizes (which the kernel already handles anyway), there is no need
> > to move around resource regions in the X server.
>
> Add the ATI Mach64 LT Pro on the Lombard Powerbooks (and some other
> PowerMac HW IIRC) to that list of borken cards. In this case, we have a
> MMIO region overlap the video mem region. How do the 2.2.x kernels handle
> the bogus S3 sizes?

The ATI Mach64 LT Pro problem is not a hardware problem but a software problem:
incorrect/incomplete assignment of PCI resources by the firmware.

The S3 problem is a hardware problem: the chip reports that it needs 32 MB of
PCI memory space, while it needs 64 MB.

Gr{oetje,eeting}s,

                                                Geert 

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds

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