re: call for testers - switching ofppc to xorg X11

[matthew green <mrg%eterna.com.au@localhost>]

> matthew green wrote:
> 
> > frank, could you explain what this patch is doing?  or more exactly,
> > why?  what's with the AGP enablement?
> 
> I'm not sure about the technical details, but I guess that you have to
> switch the Marvell controller into AGP-mode to be able to access AGP-cards
> on the PCI bus. The Pegasos2 has no real AGP bus, it is somehow...
> emulated?
> 
> By writing 0x08000000 to GT_GPP_Value_Set the configuration space of AGP
> cards becomes visible. Writing the same value to GP_GPP_Value_Clear makes
> them disappear again.
> 
> The problem in the original source was that the AGP configuration space was
> only enabled during autoconfig. So every PCI bus scan after that was unable
> to see AGP cards.

OK.  is there a reason to swap it on and off just for pci conf reads?


.mrg.