1 altbootcmd=run ${subbootcmds}
2 bootcmd=run ${subbootcmds}
3 configure=run set_uimage; km_setboardid && saveenv && reset
4 subbootcmds=tftpfdt tftpkernel nfsargs add_default boot
5 nfsargs=setenv bootargs root=/dev/nfs rw nfsroot=${serverip}:${toolchain}/${arch}
6 tftpkernel=tftpboot ${load_addr_r} ${hostname}/${uimage}
9 set_uimage=printenv uimage || setenv uimage uImage