Br23uboot100 -

Never alter the Buildroot output directory directly. Always generate an external custom directory structure using BR2_EXTERNAL to keep your unique code separate from upstream updates.

The most critical function of this bootloader version is the DRAM controller setup. The BR23 U-Boot 100 includes specific timing parameters and PHY configurations for the DDR3/DDR4 memory used on the development board. Incorrect configuration here is the most common cause of "bricking" a device during development. br23uboot100

It safely unpacks and transfers control to the operating system kernel, completing the startup sequence. Never alter the Buildroot output directory directly