[U-Boot-Users] [PATCH][CFT] bring ARM memory layout in line with the documented behaviour

[Anders Larsen]

Hi,

here's a fairly lengthy patch against 0.4.8 that brings the memory
layout of all supported ARM CPUs in line with the documentation.
This has the positive side-effect of allowing U-Boot to actually run on
PXA CPUs (the stock PXA implementation didn't set the start-address of
the malloc pool at all!)

The memory layout now more or less conforms to the standard as defined
in the README (the absolute addresses are board-specific, of course).

Since the stack and malloc-heap are now located below the U-Boot code,
the TEXT_BASE of the supported ARM boards can be increased accordingly
(for most (but not all) boards, the patch already does this).

Memory layout example based on my PXA255 (TEXT_BASE = 0xA07E0000):

0xA079FF74   Monitor Stack (growing downwards)
0xA079FF80   Board Info Data and permanent copy of Global Data
0xA07A0000   Malloc Arena
0xA07E0000   RAM copy of Monitor Code
...          optional: Frame Buffer
0xA07FFFFF   [End of RAM]

Since I only have access to PXA-based HW, I was only able to verify
that U-Boot still *builds* for all supported ARMs; I have to rely on
your help to see if it also *runs* correctly.

CHANGELOG:
   Bring ARM memory layout in line with the documentation.


Wolfgang: Please don't apply this patch until we have some feedback
from the ARM maintainers.

Robert: When/if this patch is eventually applied, you can probably push
most of your PXA -ptx stuff without having it break things.

Cheers
 Anders

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