Just like what I'm going with the PPC pmap, you might consider
using the section (1MB) PTEs to some or all of memory.
Considering the DNARD has a max of 64MB of RAM, sacrificing
64MB of KVA to map that memory and then use PMAP_MAP_POOLPAGE
to map pools.

For those systems with lots of RAM, use the same hook in UVM
that will be added to "cluster" page allocations to certain
memory regions.
--
Matt Thomas               Internet:   matt@3am-software.com
3am Software Foundry      WWW URL:    http://www.3am-software.com/bio/matt/
Cupertino, CA             Disclaimer: I avow all knowledge of this message