network driver over shared memory

Experts,

Hope this is not a too dumb question.

I have an embedded system with a few PPCs, one master
and a few slaves. All PPCs are interconnected with
shared memory over PCI.

I would like to create and IP or "Ethernet like"
network between all the PPCs to enable files transfer 
over FTP or NFS between the master and the slaves.

Is there a network driver for this in 2.6 kernel. If
not any idea where to look for or with what to begin
with.

PS: Please put my email in the reply as I'm not member
of this list (yet)

Thanks

Gaash