ARM: use high vectors if possible

[Jean-Christophe PLAGNIOL-VILLARD]

On 09:32 Mon 08 Aug     , Sascha Hauer wrote:
> 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.
I'll prefer to remap the flash and keep the same scheme everywhere

can you drop a line in the doc about this

Best Regards,
J.