ARM: use high vectors if possible

[Sascha Hauer]

Hi J,

On Mon, Aug 08, 2011 at 09:06:50AM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 08:46 Mon 08 Aug     , Sascha Hauer wrote:
> > Created this series to get high vector support. Using high vectors
> > at 0xffff0000 allow us to map in a faulting page at 0x0 with which
> > we can catch NULL pointer dereferences. The other patches are only
> > some cleanups around exceptions which I came along the way.
> be careful on ixp4xx (which I work on 0x0 is the nor flash address)

Well, we already map the vectors to 0x0 without this series, so ixp4xx
is broken anyway.
So we either have to add a flag somewhere to disable mapping anything
to 0x0 or we have to use the mmu to map the nor flash somewhere else.

I see this is a problem which must be solved, but this series does not
change the current situation in this regard.

Sascha


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