Cortex-A9 RealMode Memory size

Note: This was originally posted on 29th April 2011 at http://forums.arm.com

Dear ARM's guru,

I'm asking myself about the ARM real mode and especially about the memory management on this mode.

Is there a limitation on memory allocution in real-mode under ARM?
Is ARM's Cortex CPU behave like Intel's x86 CPU in real-mode in term of memory allocution?

In fact I want to know if I could use more than the usual 1Mb (Using Gate A20 trick) available in real-mode with an Intel CPU.

Many thanks in advance.
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