[PATCH 0/9] Switch internal registers address to 0xF1 on Armada 370/XP

[sebastian.hesselbarth@gmail.com (Sebastian Hesselbarth)]

On 05/22/2013 04:17 PM, Russell King - ARM Linux wrote:
> The question which was asked was:
>
> 	What happens if you access a register at 0xd0xxxxxx when the
> 	registers are remapped to 0xf1xxxxxx?
>
> The answer which was given was:
>
> 	It hangs on XP / 370, but doesn't on Dove.
>
...
> What we need to know is: after the boot loader passes control to the
> kernel, and before _we_ start fiddling around with any clocks, is the
> region at 0xd0xxxxxx accessible without hanging the CPU?
>
> That's the point at which we'd want to probe for the remapped registers,
> so that's the point where the test access must be made - and with the
> system clocks in whatever state was left by the reset+boot loader.

Russell,

I tried both Armada 370 and Dove on a very minimal console-only barebox.
Poking the wrong addresses always hangs 370 while Dove happily returns
zero.

Sebastian