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

Kostas Gewrgiou gewrgiou at imbc.gr
Wed Jun 21 04:43:49 EST 2000

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.


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