Boot scripts

This folder contains all the boot scripts for booting / upgrading any OS:

• bootscript-mainline.txt: boot script for any OS using mainline-based kernel
• bootscript-ubuntu.txt: boot script for Ubuntu OS using NXP-based kernel
• bootscript-yocto.txt: boot script for Yocto OS using NXP-based kernel
• net_upgrade_fs.txt: downloads ${upgrade_file} over TFTP and flashes it into ${upgrade_device}
• net_upgradeu_fs.txt: downloads ${net_upgrade_fs} over TFTP and executes it
• net_upgradeu.txt: downloads u-boot.${uboot_defconfig} over TFTP and flashes it into NOR flash
• prog_fuses.txt: program the fuses for both MAC address and boot selection
• upgrade.txt: downloads u-boot.${uboot_defconfig} from local media and flashes it into NOR flash

Those .txt files need to be transformed into U-Boot scripts (.scr) using mkimage.

Here is an example for generating a boot.scr for 32-bit platforms (i.MX5/6/7) running Yocto OS:

mkimage -A arm -O linux -T script -C none -a 0 -e 0 -n "bootscript" -d bootscript-yocto.txt boot.scr

Here is an example for generating a boot.scr for 64-bit platforms (i.MX8) running Yocto OS:

mkimage -A arm64 -O linux -T script -C none -a 0 -e 0 -n "bootscript" -d bootscript-yocto.txt boot.scr