Errata on multiplatform kernels

[tony@atomide.com (Tony Lindgren)]

* Jon Masters <jonathan@jonmasters.org> [121211 16:59]:
> And for the (Google) record, if you see an imprecise external abort at
> boot time on recent multiplatform kernel:
> 
> [   22.141268] Unhandled fault: imprecise external abort (0xc06) at
> 0x4cb2e830
> 
> This may well be that your kernel is running in non-secure mode and does
> not have access to undocumented/unexposed registers that it is trying to
> write into, and consequently is causing this error. There. That should
> save some other poor sucker many wasted hours. Could this, perhaps,
> sometime be documented somewhere? :)

Hmm how about we add a handler for that that would just set the
booted CPU to have non-secure flag set for other code to use?
That is assuming it's the same abort for all ARMs..

Tony