[U-Boot] the definition of TEXT_BASE

[mingzhao]

Hello everyone,

I begin my journey of u-boot recently and I got a lot of problems 
because I learn it by myself, so I really need helps of experts. This is 
also my first time to use the mailing list, so if I do something wrong 
or impolite, please tell me.

This time my question is about the definition of TEXT_BASE. I want to 
know how to calculate the value of TEXT_BASE for a fixed board.

I'm reading the bootloader for ARM920T and board SMDK2410. 
TEXT_BASE=0x33F800000. The reason offered in the config.mk is :

#
# SMDK2410 has 1 bank of 64 MB DRAM
#
# 3000'0000 to 3400'0000
#
# Linux-Kernel is expected to be at 3000'8000, entry 3000'8000
# optionally with a ramdisk at 3080'0000
#
# we load ourself to 33F8'0000
#
# download area is 3300'0000
#

I can't understand and look forward for any information as a help. 
Thanks for advance!

Ming