AM3359: U-boot memory map

Part Number: AM3359

Hi,

I am in process or setting up environment variables in u-boot for AM3359 device. I am using TI SDK 05_03.00_07.

My SDRAM size is 256 Mbytes, so my total memory map would be as below:

After relocation,

Where does u-boot get loaded & where is stack and heap space allocated within this memory range?

Basically, I am looking for memory map of SDRAM in u-boot. Which are the macros I should use to derive memory map of u-boot?

Based on this I want to fix addresses for my environment variables.

Please let know your input on this.

Regards

Srinivasa