Phoronix: Radeon R600 DRM In The Works

AMD has yet to publicly release the R600 (Radeon HD 2000 / Radeon HD 3000) documentation, but the xf86-video-radeonhd developers at Novell have had this documentation under NDA. This documentation, however, is expected to be cleared for release soon. Novell's Matthias Hopf has mentioned that this register documentation is in excess of 650 pages.....

http://www.phoronix.com/vr.php?view=NjUwNw