> 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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