On Mon, Apr 16, 2012 at 04:14:25AM +0000, Sethi Varun-B16395 wrote:
> You can use a 4 cell interrupt specifier (we use that in case of embedded
> power architecture platforms)
> - First cell corresponds to one of the four cascade lines (coming from the
> cascaded pic)
> - Second cell provides the interrupt sense information
> - Third one tells the interrupt subtype (in your case should be the cascade
> power interrupt type)
> - Fourth cell communicates the interrupt number corresponding to the cascaded
> pic.
>
> There would be a single interrupt parent, which is the system interrupt
> controller. You would have
> to translate the four cell interrupt specifier and also add cascaded
> interrupt handling
> for the shared interrupt line.
No, don't do that.
Use the interrupt-map technique described in the thread that got
linked earlier.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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