4 GB RAM showing up as 3, BIOS memory hole and all that

[Daniel Rock]

Scott Long schrieb:
> AMD puts the memory controller into the CPU instead of in the
 > PCI host bridge, so it's much harder to have the two work together
 > to do the remapping.  I believe that there are some Opteron
 > systems that can do this, though.

The gory details are described in AMD's Technical Documentation #26094 (BIOS 
and Kernel Developer's Guide)

http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/26094.PDF

in section 3.5.8.


Daniel