Howto limit agp aperture size?

[Clemens Eisserer]

Hi,

Is there any way, to limit agp aperture size, maybe by passing a
parameter to the agpgart module?
The bios doesn't provide any setting unfourtunatly :/

Background: I am using a quite old version of nouveau (that one
shipped with Fedora-11), and nouveau seems to reserve the whole apg
aperture (256mb) instead of using it on-demand. That means half of the
system's ram is statically dedicated to nouveau.

Thank you in advance, Clemens