[OpenWrt Wiki] The Bootloader
https://openwrt.org/docs/techref/bootloader10.07.2021 · The main advantage for OpenWrt is, that the existence of a bootloader offers users and developers additional possibilities to debrick a device. Features Limitations Some bootloader or implementation of universal bootloaders come with certain limitation implemented by the OEM, such as: a willfully designed kernel/firmware size limitation
[OpenWrt Wiki] The Boot Process
openwrt.org › docs › techrefDec 09, 2021 · Example from the openwrt-x86-ext2-image.kernel file entry for normal boot: “kernel /boot/vmlinuz root=/dev/hda2 init=/etc/preinit [rest of options]” This entry in the boot/grub/menu.lst file tells grub that the kernel is located under the /boot directory and the filename is vmlinuz.
[OpenWrt Wiki] The Bootloader
openwrt.org › docs › techrefJul 10, 2021 · The main advantage for OpenWrt is, that the existence of a bootloader offers users and developers additional possibilities to debrick a device. Features Limitations Some bootloader or implementation of universal bootloaders come with certain limitation implemented by the OEM, such as: a willfully designed kernel/firmware size limitation
[OpenWrt Wiki] Das U-Boot Environment
openwrt.org › docs › techrefAccessing U-Boot environment variables in OpenWrt The relevant tools to manipulate the U-Boot environment are contained in the opkg -package uboot-envtools . However there are several steps to be able to use the above commands effectively. First of all you must tell the fw_* tools where the U-Boot environment is located.