Open Firmware Flat Tree and usage.
  ----------------------------------
  
  As part of the ongoing cleanup of the Linux PPC trees, the preferred
  way to pass bootloader and board setup information is the open
  firmware flat tree.
  
  Please take a look at the following email discussion for some
  background.
  
    http://ozlabs.org/pipermail/linuxppc-dev/2005-August/019408.html
    http://ozlabs.org/pipermail/linuxppc-dev/2005-August/019362.html
  
  The generated tree is part static and part dynamic.
  
  There is a static part which is compiled in with DTC and a dynamic
  part which is programmatically appended.
  
  You'll need a fairly recent DTC tool, which is available by git at
  
    rsync://ozlabs.org/dtc/dtc.git
  
  The xxd binary dumper is needed too which I got from
  
    ftp://ftp.uni-erlangen.de/pub/utilities/etc/xxd-1.10.tar.gz
  
  
  Pantelis Antoniou, 13 Oct 2005