Re: [PATCH 0/3] GIC OF bindings

From: Mitch Bradley
Date: Wed Sep 21 2011 - 03:11:39 EST


On 9/20/2011 7:21 PM, David Miller wrote:
From: Mitch Bradley<wmb@xxxxxxxxxxxxx>
Date: Tue, 20 Sep 2011 18:58:12 -1000

interrupt-parent has been part of the interrupt mapping spec from the
inception of same.

http://www.openfirmware.info/docs/rec.intmap.d09.pdf

Thanks for the link.

In my vast collection of Sun OF dumps, I cannot find a single instance
where they've made use of this property, which is why I've never seen
it before.

I can't say I'm surprised at that. Sun hardware tends to be rather more hierarchical than is the norm in, for example, the PC space. This particular document came into being during the CHRP era, when IBM and Apple were trying to glue a Macintosh legacy I/O system onto the side of a PC legacy I/O system. The result was not pretty.

Sun had at least the semblance of a coherent architectural design and review process.
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