thanx larsc...i figured out that i was missing a key step in the speedway tutorial...it was the change that had to be made in the zynq_common.h file in u-boot-xlnx/include/configs/ folder....it was to change the sd card boot method from ramdisk to rootfs....the change in address accordingly was already documented there...i somehow missed it...but its good to update it on wiki website....since i have seen a couple of posts from people asking this question...
best regards