[PATCH 0/8] Support Marvell bootloaders remapping registers at different locations

[Arnd Bergmann]

On Wednesday 05 June 2013 09:04:53 Thomas Petazzoni wrote:
> 
> On Marvell platforms, the base address of the "internal registers"
> (i.e registers of all peripherals) can be configured at runtime. At
> reset, it is set to 0xD0000000, but it can freely be changed to some
> other location.
> 
> On all previous Marvell SoC families, Linux assumes the bootloader has
> remapped the internal registers at 0xF1000000, and Marvell is now
> moving to do the same on Armada 370/XP, since it allows to use as much
> RAM as possible in the 0 -> 4G area. However, due to early issues,
> until now, Marvell bootloaders were leaving the internal registers
> address set to 0xD0000000, and recently, Marvell has started shipping
> bootloaders that remapped those registers to 0xF1000000.
> 
> In order to support those two cases, we want to make sure the Device
> Tree is the only location where the physical base address of the
> internal registers is stored. This patch set removes the places where
> the physical base address of the registers was hardcoded and provides
> two Kconfig options for the earlyprintk UART address selection (one
> for 0xD0000000 and one for 0xF1000000).
> 
> It no longer uses the CP15 trick, nor it tries to do runtime remapping
> to 0xF1 if it wasn't done by the bootloader. But it allows to easily
> boot a kernel with both old and new bootloaders by doing a simple
> change, in a single location in the Device Tree.
> 
> This patch series is based on jcooper/mvebu/fixes-non-critical and
> jcooper/mvebu/cleanup, which contains 3 patches that are necessary to
> make this patch series work properly.

Looks all good to me, thanks a lot for sorting this out!

Acked-by: Arnd Bergmann <arnd at arndb.de>