Disclaimer

Configuring the build

Prerequisites

It is up to developers to prepare the host machine; it requires:

• Setup Cross Compiler
• Install these packages: shareutils, swig

Setup U-Boot environment

• WorkDir:

mkdir -p compulab-bootloader/build && cd compulab-bootloader
export BUILD=$(pwd)/build

• Set a CompuLab machine:

Machine	Command Line
ucm-imx8m-plus	export MACHINE=ucm-imx8m-plus
ucm-imx8m-plus (eval V2)	export MACHINE=ucm-imx8m-plus-sbev
mcm-imx8m-plus	export MACHINE=mcm-imx8m-plus
som-imx8m-plus	export MACHINE=som-imx8m-plus
iot-gate-imx8plus	export MACHINE=iot-gate-imx8plus
iotdin-imx8p	export MACHINE=iotdin-imx8p

• Clone the source code:

git clone --branch u-boot-compulab_v2023.04 https://github.com/compulab-yokneam/u-boot-compulab.git
cd u-boot-compulab

Create U-boot binary

• Apply the default machine config

make O=${BUILD} ${MACHINE}_defconfig

• Build flash.bin file:

nice make -j`nproc` O=${BUILD} flash.bin

• Create u-boot-initial-env file:

make O=${BUILD} u-boot-initial-env

• Results

ls -al ${BUILD}/{flash.bin,u-boot-initial-env}

Extra

Available configuration fragments:

conf fragmen file name	description
d2.config	Dram D2 support
d4.config	Dram D4 support
d1d8.config	Dram D1/D8 support
lab_temp.config	Extended temp range
spl_size.config	Extra spl size

Examples for applying configuration fragments:

• d2 with all options:

make O=${BUILD} ${MACHINE}_defconfig d2.config lab_temp.config spl_size.config

• d4 with all options:

make O=${BUILD} ${MACHINE}_defconfig d4.config lab_temp.config spl_size.config

• d1d8 with all options:

make O=${BUILD} ${MACHINE}_defconfig d1d8.config lab_temp.config spl_size.config