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Subject: Re: [RFC 3/3] zImage: Exception vector support
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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> It won't do any good, or it won't work?  I figured it would just branch to
> _zimage_start on non-SMP systems.

Well, the SPRN_CTRLF register only exist on some processors. Also,
non-IBM processors are likely to do things differently. In fact, I'm not
even sure that all POWERx processor use the bits in there the same way.

Ben.