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From: Segher Boessenkool <segher@kernel.crashing.org>
Subject: Re: [PATCH 2/10 v2] Add the MPC8641 HPCN platform files.
Date: Sat, 10 Jun 2006 15:52:00 +0200
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "linuxppc-dev@ozlabs.org" <linuxppc-dev@ozlabs.org>,
	Jon Loeliger <jdl@jdl.com>
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>>> Cascade handling is changing with my genirq port. It will be easy to
>>> adapt though. Same comments howveer, you should have a device- 
>>> tree node
>>> for the 8259 (under an ISA bridge, those shall really be in the
>>> device-tree). In general, on-board bridges should be in the  
>>> device-tree,
>>> only slots or standardly routed child PCI devices need not.
>>
>> Can you send me an example?
>
> I'll try to dig something. Power3 at least has MPIC<->8259 cascade, as
> do some IBM blades when running bare metal kernels.

On the blades, the 8259 isn't cascaded to the MPIC.  And we disable
it completely anyway ;-)


Segher