How to mask IRQ

[Eric Valette]

leonp at plris.com wrote:

> In my case - both. When I have received IRQ5, i need to mask itself and IRQ4 
> too.

OK. The current IRQ is always maked...


> Hmmm, may be I miss something.
> The dispatcher code I see in general looks like:
> 
> void C_dispatch_irq_handler (CPU_Interrupt_frame *frame, unsigned int excNum)
> {
> register unsigned oldMask;                  /* old siu pic masks */
> .......
>     oldMask = ppc_cached_irq_mask;
>     ppc_cached_irq_mask = oldMask & SIU_IvectMask[irq];

<== the SIU_IvectMask[irq] is what I mean as currently it mask only the
current interrupt but could maks others. See comment in the table
initialization. In fact I was wrong I my first message the mak
possibility is currently at SIU level via this table.  Could be also
done at CPM but have no more doucmentation handy...


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