[linux-fbdev] Re: 3D accel on PPC

[Kostas Gewrgiou]

On Tue, 20 Jun 2000, Geert Uytterhoeven wrote:

> On Mon, 19 Jun 2000, Kostas Gewrgiou wrote:
> > What is holding back ppc voodoo3 in xfree right now
> > is PIO support, i tried to use tdfxfb to get away from
> > this but there a problems there as well (the xserver
> > needs a 2*vramsize mapping in the framebuffer but fbdev
> > can't do this unless i patch tdfxfb to think that its
> > vram is 2*realsize, Geert any ideas how we can get away
> > from this ?)
>
> Why do they want 2*vramsize? Is the extra space where no RAM is used for
> something different? Can they map something there?
>

 In voodoo you can setup one part of the framebuffer as tiled memory,
access to this tiled memory needs more address space thats why a
mapping of 2*ram is needed.

  Kostas


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