Uboot access to emmc partitions

Hi all,
          I do have a requirement to access e-mmc partitions from the uboot cmdline, like we do after booting Linux. All support sources pointing boot Linux and then touch the e-mmc, it would be a great help if somebody help me,facing the toughest time.


After 6 hard days, i had integrated the u-boot changes, which includes:
mmc hardware partitioning changes,now i can
mmc dev /dev/mmcblk1 gp check| set| completed
mmc rpmb

missing the documentation though…!!!