how to do slave ratio search in u-boot ?

we found TI Badri said :

S/W leveling has to be done for your board. There are no common values that can be used. The uboot that is part of DVR RDK has the same slave ratio search algorithm that is implemented in CCS based s/w leveling .out file so you don't need CCS to do s/w leveling.You can program the correct values and uboot will print the DQS values.You should then recompile the uboot with the printed values.

and

we  want to use the uboot to instead CCS to detect the SW leveling parameters , the RDK version is 4.00.01, would u plz. tell us how to do with the Uboot ?