1: off
2: off
S1
1: on
2: on
3: off
4: on
5: on
6: on
7: off
8: on
9: on
10: on
(2) USB flash drive with two partitions
First partition: FAT-32 recommended to store Linux kernel/device tree blob/etc.
Second partition: EXT-4 used for rootfs
(3) Extract the ubuntu rootfs to second partition
sudo mount /dev/sd?2 /mnt
cd /mnt
sudo tar xf rootfs_lsdk2012_ubuntu_main_arm64.tgz
sudo umount /mnt
U-boot
(1) Power on the board and stop in u-boot command prompt
(2) Run the following command to
=> mmc rescan
(3) Use the following command to set bootargs to use USB rootfs
=> setenv bootargs root=/dev/sda2 rw rootwait rootfstype=ext4 earlycon=uart8250,mmio,0x21c0500 console=ttyS0,115200 loglevel=8 nohz=off
(4) Use the following commands to load Linux kernel and device tree blob from USB
=> usb start
=> fatload usb 0:1 0x8f000000 fsl-ls1046a-db-sdk.dtb
=> fatload usb 0:1 0x81000000 Image (5) Use the following command to boot the Linux kernel
=> booti 0x81000000 - 0x8f000000
