Debian Build U-Boot
Toolchain installation for out of builds
To install the toolchain, follow the Yocto Toolchain installation guide.
Build U-Boot out of tree
Obtain sources:
$ git clone https://github.com/varigit/uboot-imx.git -b imx_v2018.03_4.14.98_2.3.0_var01 $ cd uboot-imx
Configure compilation environment:
$ export ARCH=arm64 $ export CROSS_COMPILE=~/debian_imx8qxp-var-som/toolchain/gcc-linaro-6.3.1-2017.05-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-
Cleanup everything:
$ make mrproper
Select configuration:
$ make imx8qxp_var_som_defconfig
Build U-Boot:
$ make -j$(nproc)
Build boot image
The final boot image contains multiple firmware files, as explained by NXP in IMX_LINUX_USERS_GUIDE.pdf (Search for "How to build imx-boot image by using imx-mkimage").
The following procedure builds the final image:
Create imx-boot-tools directory:
$ mkdir imx-boot-tools $ cd imx-boot-tools
Obtain SC firmware:
Either build SCFW by following the Build SCFW from source code page and copy the SCFW image to the imx-boot-tools directory, or download the pre-built binary by running:
For i.MXQXP SOC revB:
$ wget https://github.com/varigit/debian-var/raw/debian_buster_var01/variscite/imx8qxp-var-som/imx-boot-tools-b0/ -O scfw_tcm.bin
For i.MXQXP SOC revB:
$ wget https://github.com/varigit/debian-var/raw/debian_buster_var01/variscite/imx8qxp-var-som/imx-boot-tools/ -O scfw_tcm.bin
Download SECO firmware:
For i.MXQXP SOC revB:
$ wget https://github.com/varigit/debian-var/raw/debian_buster_var01/variscite/imx8qxp-var-som/imx-boot-tools-b0/
For i.MXQXP SOC revC:
$ wget https://github.com/varigit/debian-var/raw/debian_buster_var01/variscite/imx8qxp-var-som/imx-boot-tools/
Download ATF:
For i.MXQXP SOC revB:
$ wget https://github.com/varigit/debian-var/raw/debian_buster_var01/variscite/imx8qxp-var-som/imx-boot-tools-b0/bl31-imx8qx.bin -O bl31.bin
For i.MXQXP SOC revC:
$ wget https://github.com/varigit/debian-var/raw/debian_buster_var01/variscite/imx8qxp-var-som/imx-boot-tools/bl31-imx8qx.bin -O bl31.bin
Download and build imx-mkimage:
$ git clone /imx-mkimage -b $ cd imx-mkimage $ make $ cp mkimage_imx8 /soc.mak /*.sh scripts/pad_image.sh .. $ cd ..
Copy U-Boot binaries:
$ cp ../tools/mkimage mkimage_uboot $ cp ../u-boot.bin . $ cp ../spl/u-boot-spl.bin .
Depending on i.MX8QXP SOC revision different instructions should be used to build boot image.
The SOC revision is printed by u-boot as follows
CPU: Freescale i.MX8QXP revB A35 at 1200 MHz at 36C
or
CPU: Freescale i.MX8QXP revC A35 at 1200 MHz at 36C
Build boot image for SOC revision B:
$ make -f soc.mak clean $ make -f soc.mak SOC= REV=B0 MKIMG=./mkimage_imx8 PAD_IMAGE=./pad_image.sh flash_spl $ mv flash.bin u-boot.img-sd
Build boot image for SOC revision C:
$ make -f soc.mak clean $ make -f soc.mak SOC= REV=C0 MKIMG=./mkimage_imx8 PAD_IMAGE=./pad_image.sh flash_spl $ mv flash.bin u-boot.img-sd
Install the built U-Boot on an SD card
$ sudo dd if=u-boot.img-sd of=/dev/sdX bs=1K seek=32 conv=fsync (Replace /dev/sdX with the correct device)
If you want to use our recovery SD card to flash the built U-Boot to NAND flash/eMMC, then copy it to the appropriate location in the SD card:
$ sudo cp SPL /media/rootfs/opt/images/Debian $ sudo cp u-boot.img /media/rootfs/opt/images/Debian
And eject the SD card gracefully from host machine.
Update your U-Boot out of Debian tree
$ cd uboot-imx $ git pull