[PATCH] arm: mvebu: support for the new Armada XP evaluation board(DB-MV784MP-GP)

Andrew Lunn andrew at lunn.ch
Thu Jan 31 11:38:14 EST 2013

On Thu, Jan 31, 2013 at 05:22:54PM +0100, Andrew Lunn wrote:
> > Well in fact it is 4GB RAM but we can only use 3GB (we need the last GB
> > of address space for peripheral, CPU registers and IOmem).
> Hi Gregory
> Does the CPU support Large Physical Addressing, LPA? Is that on the
> roadmap for Armada?

I did a bit of googling:


	To address the cloud-computing market, the company added
	40-bit physical addressing to Armada XP, using a method
	similar to what ARM implemented in Cortex-A15. This feature
	allows the memory controller to support up to one terabyte
	(1TB) of DRAM.



talks about 40-bit.

So it should be possible to use the full 4GBytes of RAM, in theory.


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