[PATCH v2 04/31] arm64: MMU definitions

* Catalin Marinas [off-list ref] [120817 02:21]:

On Fri, Aug 17, 2012 at 10:04:52AM +0100, Tony Lindgren wrote:

quoted

* Catalin Marinas [off-list ref] [120814 10:57]:

quoted

The virtual memory layout is described in
Documentation/arm64/memory.txt. This patch adds the MMU definitions for
the 4KB and 64KB translation table configurations. The SECTION_SIZE is
2MB with 4KB page and 512MB with 64KB page configuration.

PHYS_OFFSET is calculated at run-time and stored in a variable (no
run-time code patching at this stage).

Care to clarify this part a bit? Is the memory standardized somehow
now and not needed? Or do we still need to add that for various SoCs
later on?

The memory is not standardised but we have FDT to fully specify it. The
PHYS_OFFSET does not need to be defined, it is automatically detected at
boo-time based on the kernel load address and stored in a variable to be
used later.

OK nice thanks.

Tony