[PATCH] new radeon memory map fixes

[Benjamin Herrenschmidt]

On Thu, 2006-01-26 at 01:42 +0100, Roland Scheidegger wrote:

> Not tested yet, but I see you now no longer set the HDP_APER_CNTL which 
> didn't work for me at all. However, does that mean some cards which map 
> their memory as for instance 2x64MB have to live with 64MB because of 
> that? Do you have any information why this setting doesn't work for some 
> cards?

Unless I screwed up, I keep the original code from Hui that sets it on
some cards (r300 typically). My previous patch set it on all cards but
that caused some cards (including an rv250 I have here) to completely
stop responding on PCI accesses to the aperture :(

Note also that I don't clear it neither ... Thus if the firmware sets
it, it will work. I do read the bit to decide wether to expose half or
not of memory in those cases.

I'm still waiting for somebody from ATI to reply to my request asking
for more infos about what's going on with that bit ...

Ben