Instruction OCM

Koss, Mike (Mission Systems) mike.koss at
Tue May 20 03:59:51 EST 2008

How is your IOCM actually built into your system, i.e. what is its base
address? It cannot overlap with any other memory address in the system.
-- Mike


From: mojtaba [mailto:kernelppc at] 
Sent: Monday, May 19, 2008 11:17 AM
To: linuxppc-embedded at
Subject: Instruction OCM

Dear all,

I cannot run Linux when I have an instruction OCM in my design but,
without instruction OCM everything is fine. I tried to do some
debugging. It seems that the Linux memory management unit has a problem
with that.  After entering the MMU initialization phase, it suddenly
jumps to address 0x00000700 it get stuck there. Is there anybody who
have tried a design with instruction OCM? Do I need to do special
configuration for the Linux kernel? 



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