[U-Boot-Users] running custom apps under uboot

[himbA]

hi

I would like to code standalone app under uboot that would test my eth 
chip.
I tried running hello_world.srec from ram location and I got 'prefetch 
abort' on go. My procedure follows:
tftp a0100000 hello_world.srec
go a0140004 test test2
(go a0100000 test test2)

address value for go is memory location plus offset defined in Makefile. 
Both go commands yield an error and reset the board.

I would like to know what file and how to modify it to get standalone 
programs running from memory.

regards, himba