I am working on a separate project where there is a
discontiguous physical memory map . In looking at
solutions, it looks like the way to go is to 
use something like a SPARSEMEM option. 

FWIW, it even mentions something about discontinuous 
memory in the Device Tree example about the 970 CPU
(Documentation/powerpc/booting-without-of.txt)

I am wondering if there is an implementation for
SPARSEMEM or DISCONTIGMEM being worked on in the 
powerpc branch that I could use for the mpc85xx family? 

Or does somebody have another suggestion on how 
I would do this?

Thanks in advance you can suggest!

Tom Morrison
Principal S/W Engineer
Empirix, Inc (www.empirix.com)
[EMAIL PROTECTED]
(781) 266 - 3567

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