Linux/AM3352: mmc hwpartition how to use it?

Tool/software: Linux

Hello, 

We are working on AM3352 custom board.

We are booting the board from UART till u-boot prompt.

Now we need to do partition of eMMC at u-boot level only, we can detect eMMC at u-boot level.

we can also directly write at u-boot level using "mmc write".

We see the "mmc hwpartition"  command and we need to do partition.

so how can i do that?

please give some guideline.

Regards,

-- Ronak