PPC new exception processing and interrupt controller

[VALETTE Eric]

OUTWATER ~ KEITH J /5G3110 wrote:

> Greetings all - 
> I'm trying to get a BSP for a generic powerPC 750 based system up and running 
> and I'm having some trouble figuring out how exceptions should be processed.
> 
> I'm looking at the motorola_powerpc BSP family, but this set of BSPs is much 
> more complex than my application requires.
> 
> I have an embedded system with only RAM, FLASH, a NS16550 UART and a custom 
> interrupt controller.  That's it!
> 
> Can anyone summarize the method/approach for getting interrupts and the 
> interrupt controller hooked into RTEMS?  Initially, I'd be happy to get the UART 
> interrupt and the internal decrementer runing.
> 
> Thanks!
> 
> Keith.
> 
> 

You have already execption support. Interrupt are just a particular kind 
of exception. So I would chnage the exception handler associated with 
exetrnal interrupts (see  BSP_rtems_irq_mng_init in irq_init.c to put 
whatever function you want...).

Note that the low level code in irq_asm.c should be OK because it is not 
BSP dependent (PIC dependent).

My two 0.02.

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