Re: INTC / IRQ Numbers

[EXTERNAL B. M. (P. ST-FIR/Eng) <ext...@de...>]

Hi,

> Basicly how do I calculate the IRQ number using the INTC table in
setup-sh770x.c.

> For instance I want to know where IRQ4 ends up, If I check how the RTC
IRQ's are calculated and use the I end up at IRQ 30.
> Not sure If I understand it properly.

The hexadecimal numbers in the CPU setup are the intevt values of the
intevt register of the interrupt controller.
There is a fixed mapping from the intevt value to the irq-source in the
datasheet. Thats the intc_vect struct in the CPU setup.

The mapping from an intevt value to the irq-number linux uses is done
with the evt2irq macro in asm-sh/irq.h. There you find also the macro
which does it the other way round.

See the attached table for a precomputed list.

Markus