This topic shows steps to customize LITB by using a different kernel image instead of the existing kernel image.
- Browse to the FlexBuild installation directory.
- Modify the kernel image in linux_arm64_LS.its.
$ vi configs/linux/linux_arm64_LS.its
- Save the changes done in the file.
- Generate LITB using flex-builder.
$ source setup.env $ flex-builder -i mkitb -r <distro_type>:<distro_scale> -a <arch>For example:
$ source setup.env $ flex-builder -i mkitb -r ubuntu:main -a arm64 INSTRUCTION: mkitb DISTRO TYPE: ubuntu DISTRO SCALE: main .... .... /home/flexbuild_lsdk2004/build/images/lsdk2004_ubuntu_main_LS_arm64.itb [Done]Note: To create .itb file directly from .its file, run this command: mkimage -f <xyz.its> <xyz.itb>
- Connect to the board console via terminal and run following commands at U-boot to boot the board with customized LITB.
=> ping $serverip Using e1000#0 device host 192.168.3.1 is alive => Using e1000#0 device host 192.168.3.1 is alive => tftp 0xa0000000 lsdk2004_ubuntu_main_LS_arm64.itb Using e1000#0 device TFTP from server 192.168.3.1; our IP address is 192.168.3.49 Filename 'lsdk2004_ubuntu_main_LS_arm64.itb'. Load address: 0xa0000000 Loading: ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# #################################### 9.8 MiB/s done Bytes transferred = 683506200 (28bd7a18 hex) => bootm 0xa0000000#lx2160ardb ## Loading kernel from FIT Image at a0000000 ... Using 'lx2160ardb' configuration Trying 'kernel' kernel subimage Description: ARM64 Kernel Created: 2021-02-03 6:01:29 UTC Type: Kernel Image Compression: gzip compressed Data Start: 0xa00000d0 Data Size: 14086432 Bytes = 13.4 MiB - Check timestamp in boot log to ensure that the board is booted with the updated kernel image in the customized LITB.
Starting kernel ... [ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd083] [ 0.000000] Linux version 5.4.3 (test@Ubuntu-18) (gcc version 7.5.0 (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04)) #1 SMP PREEMPT Wed Feb 3 00:04:09 IST 2021 [ 0.000000] Machine model: NXP Layerscape LX2160ARDB [ 0.000000] earlycon: pl11 at MMIO32 0x00000000021c0000 (options '') [ 0.000000] printk: bootconsole [pl11] enabled [ 0.000000] efi: Getting EFI parameters from FDT:
