Re: [R300] on lockups

[Benjamin H. <be...@ke...>]

On Sun, 2005-06-05 at 14:45 -0400, Vladimir Dergachev wrote:
> >> Yes, however it is convenient to do so.
> >>
> >> The point is that AGP base address will not normally overlap the location
> >> of system RAM. This is, of course, only reasonable for 32 bit systems..
> >
> > I understand that part, but it's not what I meant. What I mean is this: You
> > said, RADEON_MC_AGP_LOCATION is used to program where AGP is in the card's
> > address space, and that's all fine and makes sense.
> >
> > However, we are *also* programming dev->agp->base into a register called
> > RADEON_AGP_BASE. What is the meaning of that register?
> 
> AFAIK this offset is used by PCI GART. When PCI GART is on this offset 
> specifies location of "AGP-like" space.

No, it's the address of the AGP aperture on the _bus_, (the value you
were talking about earlier) though it's sometimes just 0.

Ben.