Need help with CPU_Context_Switch and ISR_Handler for mips32 processor

Joel Sherrill joel.sherrill at
Tue May 13 21:52:30 UTC 2003

Ivica Mikec wrote:
> Hi!
> I need help with CPU_Context_switch and ISR_Handler since the ones
> provided with RTEMS do not support mips32 processors. I also noticed that
> ISR_Handler in mips branch ends with rfe which is an instruction only for
> mips1 class of processors. ISR_Handler in mips64orion is in similar state.
> Some of the constants are hardcoded for 64 bit. I also don't understand
> how it calls my interrupt handler. Can you help me with these issues?

I don't understand what source you are looking at.  What version of
are you looking at?  The mips port had a thorough reworking over a year
and works great on R3000 class CPUs now.

> Thank you.
> Ivica

Joel Sherrill, Ph.D.             Director of Research & Development
joel at                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
Support Available                (256) 722-9985

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