[RFC] arm: Defer lookup of machine_type and vet of atags to setup.c

* Grant Likely [off-list ref] [110112 09:48]:

On Wed, Jan 12, 2011 at 10:25 AM, Russell King - ARM Linux
[off-list ref] wrote:

quoted

On Wed, Jan 12, 2011 at 10:16:44AM -0700, Grant Likely wrote:

quoted

On Wed, Jan 12, 2011 at 9:53 AM, Nicolas Pitre [off-list ref] wrote:

quoted

On Wed, 12 Jan 2011, Grant Likely wrote:

quoted

Actually it looks like the real problem is that the mmu has been
turned on, but the virtual mappings for devices have not yet been
established, and so the debug macros aren't using a valid address.

A temporary virtual mapping should be there -- look for addruart in
head.S.

Hi Russell and Nicolas,

Oops, yes all the early debug stuff works fine. ?Stupid human trick on
my end, but I've sorted it out now. ?Thanks for the help. ?I'll have
patches to post later today.

I just hacked this up, and on Versatile (real hardware) it produces
the below for an invalid r1 value - and of course works for a proper r1
value.

Heh, that look pretty close to identical to what I was just about to send.

Acked-by: Grant Likely <redacted>

Tested-by: Tony Lindgren <tony@atomide.com>