Both r600_demo and radeonhd include a header file containing all of the register names, offsets, field names, shift and mask info from the register spec document. If you're having trouble sleeping you can take a look at :
Register info and sample code using the registers is already out. The only additional information in the register spec document is comment information with tips & guidelines for the fields. I didn't feel we had enough review coverage on that part of the package so pulled it out for now to avoid holding up the rest of the information.