u-boot.txt

baudrate=115200
bootcmd=run preset bootset bootenv bootload bootstart
bootdelay=3
bootload=load $bootdev $bootunit:$bootpart 0x$loadaddr $bootroot$loadfile; if test $fdt_load = yes; then load $fdt_dev $fdt_unit:$fdt_part 0x$fdt_addr $fdt_file; bootrun="$bootkern $loadaddr - $fdt_addr"; else bootrun=$bootkern; fi
bootset=setenv bootenv 'run set$rootdev; setenv bootargs $root $video $console $bootextra'; if load $bootdev $bootunit:$bootpart 0x$loadaddr $envfile; then env import -t $loadaddr $filesize; fi; loadfile=$bootfile; rootdev=$bootdev; rootunit=$bootunit; rootpart=$bootpart; fdt_dev=$bootdev; fdt_unit=$bootunit; fdt_part=$bootpart; fdt_dir=${bootroot}; if test $cpu = 6Q; then fdt_cpu=imx6q; else fdt_cpu=imx6dl; fi; if test $board = mx6-cubox-i; then fdt_board=cubox-i; else fdt_board=hummingboard; fi; fdt_file=$fdt_dir$fdt_cpu-$fdt_board.dtb
bootstart=echo $bootfile $bootargs; echo $bootrun $loadfile; $bootrun
console=console=ttymxc0,115200
fdt_high=ffffffff
loadaddr=14000000
mmc=run reset; mmc rescan
new_kern=env del bootfile bootkern fdt_load
old_kern=setenv bootfile uImage; setenv bootkern bootm; setenv fdt_load no
preboot=usb start
preset=bootdev=mmc; bootunit=0; bootpart=1; bootroot=/boot/; envfile=${bootroot}uEnv.txt; bootfile=zImage; rootfs=ext4; rootextra="rootfstype=$rootfs ro rootwait"; bootkern=bootz; fdt_load=yes; fdt_addr=1c000000
reset=env del bootdev bootunit bootpart bootroot envfile bootfile bootkern rootdev rootunit rootpart rootfs rootextra; env del fdt_load fdt_dev fdt_unit fdt_part fdt_dir fdt_cpu fdt_board fdt_file bootkern
serialcon=setenv console console=ttymxc0,$baudrate; setenv stdout serial; setenv stderr serial; setenv stdin serial,usbkbd
setlabel=root="root=$rootlabel $rootextra"
setmmc=root="root=/dev/mmcblk${rootunit}p$rootpart $rootextra"
setusb=root="root=/dev/sda$rootpart $rootextra"
splashpos=m,m
stderr=serial,vga
stdin=serial,usbkbd
stdout=serial,vga
usb=run reset; setenv bootdev usb; usb reset
videocon=setenv console; setenv stdout vga; setenv stderr vga; setenv stdin serial,usbkbd