bootcmd=if mmc rescan; then echo SD/MMC found on device ${mmc_dev};if run loadbootenv; then echo Loaded environment from ${bootenv};run importbootenv;fi;if test -n $uenvcmd; then echo Running uenvcmd ...;run uenvcmd;fi;if run mmc_load_uimage; then run mmc_args;bootm ${kloadaddr};fi;fi;run nand_boot;