openpic specification

[SHAN Gavin]

> I ever searched openpic specification on google for several times, but unfortunately nothing found.
> Could anybody point me where I can get the openpic specification?
> 
> The source code seems being from IBM: arch/powerpc/sysdev/mpic.c

While not the openpic spec if you grab any of the Freescale RM for MPC85xx chips there will be a chapter on the PIC that is an "openPIC" based interrupt controller.

Thanks, Kumar. Actually, I'm facing a wired issue on my system: some times, the interrupt
from external devices can't be seen from CPU. That means the CPU was never disturbed by
extern interrupts at some point. I don't know why, it seems the PIC just ignored the
external interrupts.

We're using Pasemi 1682M part, which integrated a openpic compatible PIC. But the CPU part has 2
cores. There're 3 kinds of interrupts:

several internal interrupts - priority 8
one external interrupt      - priority 8
IPI                         - priority 10

Thanks,
Gavin

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