setenv bootmenu_0 coninfo=coninfo
setenv bootmenu_1 mmcinfo=mmcinfo
bootmenu 3

printenv mmc_boot
printenv scan_dev_for_boot_part
printenv scan_dev_for_boot
printenv scan_dev_for_scripts
printenv boot_scripts
boot_scripts=boot.scr.uimg boot.scr
printenv boot_a_script
boot_a_script=load ${devtype} ${devnum}:${distro_bootpart} ${scriptaddr} ${prefix}${script}; source ${scriptaddr}

ext4load mmc 1:1 ${scriptaddr}  /boot/sid.scr
source ${scriptaddr}

ext4ls mmc 1:1 /boot
# ext4load mmc 1:1 0x42000000 /root/hello_world

setenv bootargs 'root=/dev/mmcblk2p1 rootwait rootfstype=ext4 console=ttyS0,115200 console=tty1 panic=10 consoleblank=0 loglevel=1 ubootpart=6526ddf3-01 usb-storage.quirks=0x2537:0x1066:u,0x2537:0x1068:u   init=3 cgroup_enable=memory swapaccount=1 3'

setenv bootargs 'root=/dev/mmcblk2p1 rootwait console=ttyS0,115200 console=tty1'

ext4load mmc 1:1 ${ramdisk_addr_r} /boot/uInitrd-4.19.2-sunxi64
ext4load mmc 1:1 ${kernel_addr_r}  /boot/vmlinuz-4.19.2-sunxi64

booti ${kernel_addr_r} ${ramdisk_addr_r} ${fdt_addr_r}

bootelf