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| # Building Boot Firmware for CompuLab's i.MX8M Mini products | ||
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| Supported machines: | ||
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| * `IOT-GATE-iMX8` | ||
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| Define a `MACHINE` environment variable for the target product: | ||
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| |Machine|Command Line| | ||
| |---|---| | ||
| |ucm-imx8m-mini|export MACHINE=iot-gate-imx8 | ||
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| Define the following environment variables: | ||
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| |Description|Command Line| | ||
| |---|---| | ||
| |NXP firmware name|export NXP_FIRMWARE=firmware-imx-8.16.bin| | ||
| |CompuLab release|export CPL_RELEASE=rel_imx_5.15.32-2.0.0| | ||
| |CompuLab branch name|export CPL_BRANCH=lf-5.15.32-2.0.0_${MACHINE}| | ||
| |ATF revision|export ATF=cb51a0faa4b6672007f30abaa5736ccf5e4510a1| | ||
| |OPTEE revision|export OPTEE=984996422c25c99ebfc5194c1bb393028605bb0c| | ||
| |U-Boot revision|export UBOOT=263b27e076a0f6e5dcc80227a235f0af73718342| | ||
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| ## Prerequisites | ||
| It is up to developer to setup arm64 build environment: | ||
| * Download the [GNU tool chain](https://github.com/compulab-yokneam/meta-bsp-imx8mm/blob/iot-gate-imx8_r3.2/Documentation/toolchain.md) | ||
| * Set environment variables: | ||
| <pre> | ||
| export ARCH=arm64 | ||
| export CROSS_COMPILE=/opt/gcc-arm-9.2-2019.12-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu- | ||
| </pre> | ||
| * Create a folder to organize the files: | ||
| <pre> | ||
| mkdir -p imx8mm/{sources,results} | ||
| export SRC_ROOT=$(readlink -f imx8mm/sources) | ||
| export RESULTS=$(readlink -f imx8mm/results) | ||
| cd ${SRC_ROOT} | ||
| </pre> | ||
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| * Download CompuLab BSP | ||
| <pre> | ||
| git clone -b ${CPL_RELEASE} https://github.com/compulab-yokneam/meta-bsp-imx8mm.git | ||
| export LAYER_DIR=$(pwd)/meta-bsp-imx8mm | ||
| </pre> | ||
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| ## Build Procedure | ||
| ### Firmware iMX setup | ||
| * Download the firmware-imx file: | ||
| <pre> | ||
| wget http://www.freescale.com/lgfiles/NMG/MAD/YOCTO/${NXP_FIRMWARE} | ||
| bash -x ${NXP_FIRMWARE} --auto-accept | ||
| cp -v $(find firmware* | awk '/train|hdmi_imx8|dp_imx8/' ORS=" ") ${RESULTS} | ||
| </pre> | ||
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| ### Arm Trusted Firmware (ATF) setup | ||
| * Download the ATF: | ||
| <pre> | ||
| git clone https://github.com/nxp-imx/imx-atf.git | ||
| git -C imx-atf checkout ${ATF} -b ${CPL_BRANCH} | ||
| </pre> | ||
| * Apply patches if applicable: | ||
| <pre> | ||
| [[ -d ${LAYER_DIR}/recipes-bsp/imx-atf/compulab/imx8mm ]] && { \ | ||
| git -C imx-atf am ${LAYER_DIR}/recipes-bsp/imx-atf/compulab/imx8mm/*.patch | ||
| } | ||
| </pre> | ||
| * Make bl31.bin | ||
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| |Mode |Command | ||
| |---|---| | ||
| |optee build|make -j 16 -C imx-atf PLAT=imx8mm BUILD_BASE=build PLAT=imx8mm IMX_BOOT_UART_BASE=0x30880000 BL32_BASE=0x56000000 BL32_SIZE=0x2000000 SPD=opteed bl31 | ||
| |non-optee build|make -j 16 -C imx-atf PLAT=imx8mm BUILD_BASE=build PLAT=imx8mm IMX_BOOT_UART_BASE=0x30880000 BL32_BASE=0x56000000 BL32_SIZE=0x2000000 bl31 | ||
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| * Ceate a symlink in the ${RESULTS} folder: | ||
| <pre> | ||
| ln -s $(readlink -f imx-atf/build/imx8mm/release/bl31.bin) ${RESULTS}/ | ||
| </pre> | ||
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| ### OP-TEE Setup | ||
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| | Skip this for a non-optee build | | ||
| | --- | | ||
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| * Download the OP-TEE: | ||
| <pre> | ||
| git clone https://github.com/nxp-imx/imx-optee-os | ||
| git -C imx-optee-os checkout ${OPTEE} -b ${CPL_BRANCH} | ||
| </pre> | ||
| * Apply patches if applicable: | ||
| <pre> | ||
| [[ -d ${LAYER_DIR}/recipes-security/optee-imx/compulab/imx8mm ]] && { \ | ||
| git -C imx-optee-os am ${LAYER_DIR}/recipes-security/optee-imx/compulab/imx8mm/*.patch | ||
| } | ||
| </pre> | ||
| * Set environment variables: | ||
| <pre> | ||
| export ARCH=arm | ||
| export CROSS_COMPILE64=${CROSS_COMPILE} | ||
| </pre> | ||
| * Make tee.bin | ||
| <pre> | ||
| make -j 16 -C imx-optee-os PLATFORM=imx PLATFORM_FLAVOR=mx8mm_cl_iot_gate | ||
| ln -s $(readlink -f imx-optee-os/out/arm-plat-imx/core/tee-raw.bin) ${RESULTS}/tee.bin | ||
| </pre> | ||
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| ### U-Boot | ||
| * Download the U-Boot source and apply CompuLab BSP patches: | ||
| <pre> | ||
| git clone https://github.com/nxp-imx/uboot-imx.git | ||
| git -C uboot-imx checkout ${UBOOT} -b ${CPL_BRANCH} | ||
| git -C uboot-imx am ${LAYER_DIR}/recipes-bsp/u-boot/compulab/imx8mm/*.patch | ||
| </pre> | ||
| * Restore `ARCH` environment variables: | ||
| <pre> | ||
| export ARCH=arm64 | ||
| </pre> | ||
| * Compile U-Boot flash.bin: | ||
| <pre> | ||
| make -j 16 -C uboot-imx O=${RESULTS} -f defconfig.mk | ||
| make -j 16 -C uboot-imx O=${RESULTS} | ||
| </pre> | ||
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| ## Flashing | ||
| <pre> | ||
| dd if=${RESULTS}/flash.bin of=/dev/<your device> bs=1K seek=33 status=progress | ||
| </pre> | ||
| Coming soon |