Take a look at the SparcLinux list and the work on the AP1000+ multicomputer.
Im not sure if sparclinux is archived anywhere. Im sure Dave Miller can fill
that bit in
Info about the SparcLinux multicomputer work can be found at.
http://cap.anu.edu.au/cap/projects/linux
Later,
David S. Miller
davem@caip.rutgers.edu