Yocto Build U-Boot: Difference between revisions

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<!-- Set release according to "release" parameter in URL and use RELEASE_MORTY_V1.0_VAR-SOM-MX6 as default
<!-- Set release according to "release" parameter in URL and use mx8m-yocto-kirkstone-5.15-2.0.x-v1.1 as default
--> {{#vardefine:RELEASE_PARAM|{{#urlget:release}}}} <!--
--> {{INIT_RELEASE_PARAM|mx8m-yocto-kirkstone-5.15-2.0.x-v1.1}}<!--
--> {{#lst:Yocto_Platform_Customization|{{#var:RELEASE_PARAM|RELEASE_MORTY_V1.0_VAR-SOM-MX6}}}} <!--
--> {{#lst:Yocto_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
--> {{PageHeader|Yocto Build U-Boot from source code}} {{DocImage|category1=Yocto|category2={{#var:HARDWARE_NAME}}}} __toc__
--> {{#lst:Debian_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
--> {{#lst:B2QT_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
--> {{#lst:Debian_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
--> {{#vardefine:PLATFORM_OS|{{#varexists:DEBIAN_NAME|Debian|Yocto}}}} <!--
--> {{PageHeader|Yocto Build U-Boot from source code}} {{DocImage|category1=Yocto|category2=Debian}} <!--
--> [[category:{{#var:HARDWARE_NAME}}]] __toc__
 
= Toolchain installation for out of Yocto builds =
= Toolchain installation for out of Yocto builds =


To install the toolchain, follow {{Varlink2|Yocto Toolchain installation|{{#var:RELEASE_LINK}}}}.
To install the toolchain, follow the {{Varlink2|Yocto Toolchain installation|{{#var:RELEASE_LINK}}}} guide.


= Build U-Boot out of Yocto tree =
= Build U-Boot out of Yocto tree =
Obtain sources:  
Obtain sources:  


  $ git clone {{#var:U-BOOT_GIT}}
  $ git clone {{#var:U-BOOT_GIT}} -b {{#var:U-BOOT_BRANCH}}
  $ cd uboot-imx
  $ cd uboot-imx
$ git checkout {{#var:U-BOOT_BRANCH}}


Configure compilation environment:
Configure compilation environment:
  $ source {{#var:TOOLCHAIN_LOCATION}}
  $ source {{#var:TOOLCHAIN_LOCATION}}


Cleanup everything:
  $ make mrproper
  $ make mrproper
{{#ifeq: {{#var:HARDWARE_NAME}} | DART-MX8M
 
|<br>
{{#switch: {{#var:SOC_SERIES}} | imx8 | imx9=
<br>
Select configuration:
  $ make {{#var:U-BOOT_SD_DEFCONFIG}}
  $ make {{#var:U-BOOT_SD_DEFCONFIG}}
|
 
Choose one of the following configurations:
Build U-Boot:
$ make -j$(nproc)
|#default=
Select one of the following configurations:
   
   
  For booting from SD card/eMMC:
  For booting from SD card/eMMC:
Line 29: Line 40:
  For booting from NAND flash:
  For booting from NAND flash:
  $ make {{#var:U-BOOT_NAND_DEFCONFIG}}
  $ make {{#var:U-BOOT_NAND_DEFCONFIG}}
Build U-Boot:
$ make -j$(nproc)
}}
}}


$ make -j4
{{#switch: {{#var:SOC_SERIES}} | imx8 | imx9=
 
{{#ifeq: {{#var:HARDWARE_NAME}} | DART-MX8M |
= Build boot image =
= Build boot image =
The final boot image contains multiple firmware files. All of them are created during the Yocto build. The following procedure builds final image:
The final boot image contains multiple firmware files, as explained by NXP in [https://www.nxp.com/docs/en/user-guide/IMX_LINUX_USERS_GUIDE.pdf IMX_LINUX_USERS_GUIDE.pdf] (Search for "How to build imx-boot image by using imx-mkimage").


# Copy imx-boot-tools
The following procedure builds the final image:
$ cp -a {{#var:BUILD_FOLDER}}/{{#var:BUILD_FOLDER_XWAYLAND}}/tmp/deploy/images/{{#var:MACHINE_NAME}}/imx-boot-tools .


  # Copy u-boot, SPL and DTB
Create imx-boot-tools directory:
  $ mkdir imx-boot-tools
  $ cd imx-boot-tools
  $ cd imx-boot-tools
$ rm -f u-boot* *.dtb
$ cp ../u-boot.bin imx-boot-tools
$ cp ../u-boot-nodtb.bin imx-boot-tools
$ cp ../u-boot-spl.bin imx-boot-tools
$ cp ../arch/arm/dts/imx8m-var-dart.dtb imx-boot-tools


# Build SPL+DDR firmware image: u-boot-spl-ddr.bin
{{#switch: {{#var:SOC_FAMILY}}
$ objcopy -I binary -O binary --pad-to 0x8000 --gap-fill=0x0 lpddr4_pmu_train_1d_imem.bin lpddr4_pmu_train_1d_imem_pad.bin
| imx8=
  $ objcopy -I binary -O binary --pad-to 0x4000 --gap-fill=0x0 lpddr4_pmu_train_1d_dmem.bin lpddr4_pmu_train_1d_dmem_pad.bin
Obtain SC firmware:<br>
$ objcopy -I binary -O binary --pad-to 0x8000 --gap-fill=0x0 lpddr4_pmu_train_2d_imem.bin lpddr4_pmu_train_2d_imem_pad.bin
{{#ifexpr: {{#var:YOCTO_VERSION}} < 3.1 |Either build|Build}} SCFW by following the {{Varlink|Yocto_Build_SCFW|{{#var:RELEASE_LINK}}|Build SCFW from source code}} page and copy the SCFW image to the imx-boot-tools directory{{#ifexpr: {{#var:YOCTO_VERSION}} < 3.1 |, or download the pre-built binary by running:<br>
$ cat lpddr4_pmu_train_1d_imem_pad.bin lpddr4_pmu_train_1d_dmem_pad.bin > lpddr4_pmu_train_1d_fw.bin
  $ wget {{#var:META_VARISCITE_GIT}}/raw/{{#var:META_VARISCITE_BRANCH}}/recipes-bsp/imx-sc-firmware/imx-sc-firmware/{{#var:SC_FIRMWARE}} -O scfw_tcm.bin|
$ cat lpddr4_pmu_train_2d_imem_pad.bin lpddr4_pmu_train_2d_dmem.bin > lpddr4_pmu_train_2d_fw.bin
.<br><br>}}
$ cat u-boot-spl.bin lpddr4_pmu_train_1d_fw.bin lpddr4_pmu_train_2d_fw.bin > u-boot-spl-ddr.bin
$ rm -f lpddr4_pmu_train_1d_fw.bin lpddr4_pmu_train_2d_fw.bin lpddr4_pmu_train_1d_imem_pad.bin lpddr4_pmu_train_1d_dmem_pad.bin lpddr4_pmu_train_2d_imem_pad.bin


  # Build u-boot+ATF firmware image: u-boot-atf.bin
{{#ifexpr: {{#rpos: {{#var:NXP_FIRMWARE}} | firmware-imx-8.1.1}} >= 0
  $ cp bl31-imx8mq.bin u-boot-atf.bin
| <!-- SECO is in NXP_FIRMWARE for original Sumo release -->&nbsp;
  $ dd if=u-boot.bin of=u-boot-atf.bin bs=1K seek=128
Download SECO firmware:
  $ wget {{#var:NXP_FIRMWARE_URL}}/{{#var:NXP_FIRMWARE}}.bin
$ chmod +x {{#var:NXP_FIRMWARE}}.bin
$ ./{{#var:NXP_FIRMWARE}}.bin
$ cp {{#var:NXP_FIRMWARE}}/firmware/seco/{{#var:SECO_FIRMWARE}} .
| <!-- SECO is in SECO_FIRMWARE for other releases --> &nbsp;
Download SECO firmware:
$ wget {{#var:SECO_FIRMWARE_URL}}/{{#var:SECO_FIRMWARE}}.bin
$ chmod +x {{#var:SECO_FIRMWARE}}.bin
$ ./{{#var:SECO_FIRMWARE}}.bin
  $ cp {{#var:SECO_FIRMWARE}}/firmware/seco/mx8q*-ahab-container.img .
}}
| imx9=
Download Sentinel firmware:
$ wget {{#var:IMX_SENTINEL_URL}}
$ chmod +x {{#var:IMX_SENTINEL_BIN}}
$ ./{{#var:IMX_SENTINEL_BIN}}
$ cp {{#var:IMX_SENTINEL_IMG_PATH}} .
Download DDR firmware:
$ wget {{#var:NXP_FIRMWARE_URL}}/{{#var:NXP_FIRMWARE}}.bin
$ chmod +x {{#var:NXP_FIRMWARE}}.bin
$ ./{{#var:NXP_FIRMWARE}}.bin
  $ cp {{#var:NXP_FIRMWARE}}/firmware/ddr/synopsys/* .
| #default=
Download DDR {{#switch: {{#var:SOC}}|mx8mq|mx8m= and HDMI|#default=}} firmware:
$ wget {{#var:NXP_FIRMWARE_URL}}/{{#var:NXP_FIRMWARE}}.bin
$ chmod +x {{#var:NXP_FIRMWARE}}.bin
$ ./{{#var:NXP_FIRMWARE}}.bin
$ cp {{#var:NXP_FIRMWARE}}/firmware/ddr/synopsys/* .
{{#switch: {{#var:SOC}}|mx8mq|mx8m= $ cp {{#var:NXP_FIRMWARE}}/firmware/hdmi/cadence/signed_* .|#default=}}
}}


  # Build u-boot+DTB+ATF+HDMI firmware FIT image
{{#switch: {{#var:SOC_FAMILY}}
  $ ./mkimage_fit_atf.sh imx8m-var-dart.dtb > u-boot.its
| imx8=
  $ ./mkimage_uboot -E -p 0x3000 -f u-boot.its u-boot.itb
Download and build imx_mkimage:
  $ rm -f u-boot.its
  $ git clone {{#var:NXP_IMX_GIT}}/imx-mkimage -b {{#var:NXP_IMX_BRANCH}}
  $ cd imx-mkimage
$ make
$ cp mkimage_imx8 {{#var:IMX_MKIMAGE_SOC}}/soc.mak {{#var:IMX_MKIMAGE_SOC}}/*.sh scripts/pad_image.sh ..
$ cd ..
| imx9=
Download and build imx_mkimage:
$ git clone {{#var:NXP_IMX_GIT}}/imx-mkimage -b {{#var:NXP_IMX_BRANCH}}
$ cd imx-mkimage
$ make soc={{#var:IMX_MKIMAGE_SOC}}
$ cp {{#var:IMX_MKIMAGE_SOC}}/soc.mak mkimage_imx8 ..
  $ cd ..
| #default=
Download imx_mkimage:
$ git clone {{#var:NXP_IMX_GIT}}/imx-mkimage -b {{#var:NXP_IMX_BRANCH}}
$ cp imx-mkimage/iMX8M/*.c imx-mkimage/iMX8M/*.sh {{#ifeq: {{#var:FSL_BSP_VERSION}}|L4.14.78-1.0.0_ga|imx-mkimage/iMX8M/soc.mak|}} {{#ifeq: {{#var:YOCTO_NAME}}|Morty||imx-mkimage/scripts/*.sh}} .
  {{#ifexpr: {{#var:YOCTO_VERSION}} >= 3.3 |$ cp dtb_check.sh ../scripts/|}}
}}


  # Build final image
Download and build ATF:<!--
  $ ./mkimage_imx8 -fit -signed_hdmi signed_hdmi_imx8m.bin -loader u-boot-spl-ddr.bin 0x7E1000 -second_loader u-boot.itb 0x40200000 0x60000 -out {{#var:U-BOOT_SD_IMAGE_NAME}}
Use VARISCITE_ATF_GIT from yocto platform customization if exists for Variscite hosted repo, else default to NXP:
-->
$ git clone {{#var:VARISCITE_ATF_GIT | {{#var:NXP_IMX_GIT}}/imx-atf}} -b {{#var:VARISCITE_ATF_BRANCH | {{#var:NXP_IMX_BRANCH}}}}
{{#ifeq: {{#var:SOC_FAMILY}}|imx8m|
$ git clone {{#var:META_VARISCITE_GIT}} -b {{#var:META_VARISCITE_BRANCH}}
{{#ifeq: {{#var:FSL_BSP_VERSION}}|L4.14.78-1.0.0_ga||
{{#if: {{#var:IMX_MKIMAGE_SOC_PATCH}}|
$ cd imx-mkimage
{{#if: {{#var:IMX_MKIMAGE_SOC_FREESCALE_PATCH}}|
$ wget {{#var:IMX_MKIMAGE_SOC_FREESCALE_PATCH_URL}}
  $ git apply {{#var:IMX_MKIMAGE_SOC_FREESCALE_PATCH}}
$ rm {{#var:IMX_MKIMAGE_SOC_FREESCALE_PATCH}}
}}
$ git apply ../{{#var:META_VARISCITE_REPO}}/{{#var:IMX_MKIMAGE_SOC_PATCH}}<!--
  -->{{#varexists:IMX_MKIMAGE_SOC_PATCH_1 |
<br>$ git apply ../{{#var:META_VARISCITE_REPO}}/{{#var:IMX_MKIMAGE_SOC_PATCH_1}}
}}<!--
  -->{{#varexists:IMX_MKIMAGE_SOC_PATCH_2 |
<br>$ git apply ../{{#var:META_VARISCITE_REPO}}/{{#var:IMX_MKIMAGE_SOC_PATCH_2}}
}}
$ cp iMX8M/soc.mak ..
$ cd ..
|
$ cp {{#var:META_VARISCITE_REPO}}/recipes-bsp/imx-mkimage/files/soc.mak .}}
}}
|
}}
$ cd imx-atf {{#if: {{#var:VARISCITE_ATF_GIT}}||&nbsp;
{{#ifeq: {{#var:SOC_FAMILY}}| imx8m |
{{#ifeq: {{#var:FSL_BSP_VERSION}}| L4.14.78-1.0.0_ga | $ git apply ../{{#var:META_VARISCITE_REPO}}/recipes-bsp/imx-atf/imx-atf/* |
{{#switch: {{#var:SOC}}|mx8mn= $ git apply ../{{#var:META_VARISCITE_REPO}}/recipes-bsp/imx-atf/imx-atf/*
| mx8mp= $ git apply ../{{#var:META_VARISCITE_REPO}}/recipes-bsp/imx-atf/imx-atf/*
| mx8mm= $ git apply ../{{#var:META_VARISCITE_REPO}}/recipes-bsp/imx-atf/imx-atf/imx8mm* ../{{#var:META_VARISCITE_REPO}}/recipes-bsp/imx-atf/imx-atf/imx8m-* |
| mx8mq | mx8m= $ git apply ../{{#var:META_VARISCITE_REPO}}/recipes-bsp/imx-atf/imx-atf/imx8m-*}} }} }} }}
$ source {{#var:TOOLCHAIN_LOCATION}}
$ unset LDFLAGS
$ make PLAT={{#var:IMX_ATF_PLAT}} bl31
$ cp build/{{#var:IMX_ATF_PLAT}}/release/bl31.bin ..
$ cd ..
 
Copy U-Boot binaries:
$ cp ../tools/mkimage mkimage_uboot
$ cp ../u-boot.bin .
{{#switch: {{#var:SOC_FAMILY}}
| imx8m=
{{#ifeq: {{#var:FSL_BSP_VERSION}}| L4.14.78-1.0.0_ga |
$ cp ../u-boot-nodtb.bin ../spl/u-boot-spl.bin ../arch/arm/dts/{{#var:U-BOOT_DTB_FILE|{{#var:DEFAULT_DTB}}}} .
|
{{#switch: {{#var:SOC}}
| mx8mm=
$ cp ../u-boot-nodtb.bin ../spl/u-boot-spl.bin ../arch/arm/dts/{{#var:U-BOOT_DTB_DART}} ../arch/arm/dts/{{#var:U-BOOT_DTB_SOM}} {{#varexists:U-BOOT_DTB_SOM_10 | ../arch/arm/dts/{{#var:U-BOOT_DTB_SOM_10}} |}} .
| mx8mn=
$ cp ../u-boot-nodtb.bin ../spl/u-boot-spl.bin ../arch/arm/dts/{{#var:U-BOOT_DTB_SOM}} .
| mx8mp=
  $ cp ../u-boot-nodtb.bin ../spl/u-boot-spl.bin ../arch/arm/dts/{{#var:U-BOOT_DTB_DART}} ../arch/arm/dts/{{#var:U-BOOT_DTB_SOM}} .
|
$ cp ../u-boot-nodtb.bin ../spl/u-boot-spl.bin ../arch/arm/dts/{{#var:U-BOOT_DTB_FILE|{{#var:DEFAULT_DTB}}}} .
}} }}
| imx9=
$ cp ../spl/u-boot-spl.bin ../arch/arm/dts/{{#var:U-BOOT_DTB_SOM}} .
|#default=
$ cp ../spl/u-boot-spl.bin .
}}
 
{{#switch: {{#var:SOC}}
| mx8qxp=
Depending on i.MX8QXP SOC revision different instructions should be used to build boot image.<br>
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={{#var:IMX_MKIMAGE_SOC}} REV=B0 MKIMG=./mkimage_imx8 PAD_IMAGE=./pad_image.sh flash_spl
$ mv flash.bin {{#var:U-BOOT_SD_IMAGE_NAME}}
<br>
Build boot image for SOC revision C:
$ make -f soc.mak clean
$ make -f soc.mak SOC={{#var:IMX_MKIMAGE_SOC}} REV=C0 MKIMG=./mkimage_imx8 PAD_IMAGE=./pad_image.sh flash_spl
$ mv flash.bin {{#var:U-BOOT_SD_IMAGE_NAME}}
| mx8qm=
Build boot image:
$ make -f soc.mak clean
$ make -f soc.mak SOC={{#var:IMX_MKIMAGE_SOC}} MKIMG=./mkimage_imx8 PAD_IMAGE=./pad_image.sh flash_spl
$ mv flash.bin {{#var:U-BOOT_SD_IMAGE_NAME}}
| mx8mq
| mx8m=
Build boot image:
$ make -f soc.mak clean
$ make -f soc.mak SOC={{#var:IMX_MKIMAGE_SOC}} dtbs={{#var:U-BOOT_DTB_FILE|{{#var:DEFAULT_DTB}}}} MKIMG=./mkimage_imx8 PAD_IMAGE=./pad_image.sh CC=gcc OUTIMG={{#var:U-BOOT_SD_IMAGE_NAME}} flash_evk
| mx8mm=
{{#ifeq: {{#var:FSL_BSP_VERSION}}| L4.14.78-1.0.0_ga |
Build boot image:
$ make -f soc.mak clean
$ make -f soc.mak SOC={{#var:IMX_MKIMAGE_SOC}} dtbs={{#var:DEFAULT_DTB}} MKIMG=./mkimage_imx8 PAD_IMAGE=./pad_image.sh CC=gcc OUTIMG={{#var:U-BOOT_SD_IMAGE_NAME}} flash_evk
|
Build boot image:
$ make -f soc.mak clean
$ make -f soc.mak SOC={{#var:IMX_MKIMAGE_SOC}} {{#var:SOC_DIR}} dtbs="{{#var:U-BOOT_DTB_DART}} {{#var:U-BOOT_DTB_SOM}} {{#var:U-BOOT_DTB_SOM_10}}" MKIMG=./mkimage_imx8 PAD_IMAGE=./pad_image.sh CC=gcc OUTIMG={{#var:U-BOOT_SD_IMAGE_NAME}} flash_lpddr4_ddr4_evk
}}
}}
| mx8mn=
Build boot image:
$ make -f soc.mak clean
$ make -f  soc.mak  SOC={{#var:IMX_MKIMAGE_SOC}} {{#var:SOC_DIR}} dtbs="{{#var:U-BOOT_DTB_SOM}}  {{#var:U-BOOT_DTB_SOM_10}}" MKIMG=./mkimage_imx8 PAD_IMAGE=./pad_image.sh CC=gcc OUTIMG={{#var:U-BOOT_SD_IMAGE_NAME}} flash_ddr4_evk
| mx8mp=
Build boot image:
$ make -f soc.mak clean
$ make -f soc.mak  SOC={{#var:IMX_MKIMAGE_SOC}} {{#var:SOC_DIR}} dtbs="{{#var:U-BOOT_DTB_DART}}  {{#var:U-BOOT_DTB_SOM}}"  MKIMG=./mkimage_imx8 PAD_IMAGE=./pad_image.sh  CC=gcc OUTIMG={{#var:U-BOOT_SD_IMAGE_NAME}} flash_evk
| mx93=
Build boot image:
$ make -f soc.mak clean
$ make -f soc.mak  SOC={{#var:IMX_MKIMAGE_SOC}}  dtbs="{{#var:U-BOOT_DTB_SOM}}"  MKIMG=./imx-mkimage/mkimage_imx8 PAD_IMAGE=./pad_image.sh  CC=gcc flash_singleboot
$ mv flash.bin {{#var:U-BOOT_SD_IMAGE_NAME}}
|}} <!-- end of switch
--> }} <!-- end of SOC_SERIES imx8 -->


= Install the built U-Boot on an SD card =
= Install the built U-Boot on an SD card =
{{#ifeq: {{#var:HARDWARE_NAME}} | DART-MX8M |
{{#switch: {{#var:SOC_SERIES}}
|imx8
|imx9=
  <br>
  <br>
  $ sudo dd if={{#var:U-BOOT_SD_IMAGE_NAME}} of=/dev/sdX bs=1K seek=33 conv=fsync
  $ sudo dd if={{#var:U-BOOT_SD_IMAGE_NAME}} of=/dev/sdX bs=1K seek={{#var:U-BOOT_OFFSET}} conv=fsync
|
|#default=
{{#ifeq: {{#var:SPL_SD_IMAGE_NAME}} | N/A  
{{#ifeq: {{#var:SPL_SD_IMAGE_NAME}} | N/A  
|<br>
|<br>
  $ sudo dd if={{#var:U-BOOT_IMAGE_NAME}} of=/dev/sdX bs=1K seek=1; sync
  $ sudo dd if={{#var:U-BOOT_IMAGE_NAME}} of=/dev/sdX bs=1K seek=1; sync
(Replace /dev/sdX with the correct device)
|<br>
|<br>
  $ sudo dd if=SPL of=/dev/sdX bs=1K seek=1; sync
  $ sudo dd if=SPL of=/dev/sdX bs=1K seek=1; sync
  $ sudo dd if=u-boot.img of=/dev/sdX bs=1K seek=69; sync
  $ sudo dd if=u-boot.img of=/dev/sdX bs=1K seek=69; sync
(Replace /dev/sdX with the correct device)
}}
}}
}}
}}
(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:
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:
{{#ifeq: {{#var:SPL_SD_IMAGE_NAME}} | N/A  
{{#ifeq: {{#var:SPL_SD_IMAGE_NAME}} | N/A  
|<br>
|<br>
  $ sudo cp {{#var:U-BOOT_IMAGE_NAME}} /media/rootfs/opt/images/...
  $ sudo cp {{#var:U-BOOT_IMAGE_NAME}} /media/rootfs/opt/images/…
|<br>
|<br>
  $ sudo cp SPL /media/rootfs/opt/images/...
  $ sudo cp SPL /media/rootfs/opt/images/…
  $ sudo cp u-boot.img /media/rootfs/opt/images/...
  $ sudo cp u-boot.img /media/rootfs/opt/images/…
}}
}}
And eject the SD card gracefully from host machine.
And eject the SD card gracefully from host machine.

Latest revision as of 15:10, 13 September 2024

Warning: This page is designed to be used with a 'release' URL parameter.

This page is using the default release mx8m-yocto-kirkstone-5.15-2.0.x-v1.1.
To view this page for a specific Variscite SoM and software release, please follow these steps:

  1. Visit variwiki.com
  2. Select your SoM
  3. Select the software release
Yocto Build U-Boot from source code

Toolchain installation for out of Yocto builds

To install the toolchain, follow the Yocto Toolchain installation guide.

Build U-Boot out of Yocto tree

Obtain sources: 

$ git clone https://github.com/varigit/uboot-imx.git -b lf_v2022.04_var01
$ cd uboot-imx

Configure compilation environment: 

$ source /opt/fslc-xwayland/3.3/environment-setup-cortexa53-crypto-fslc-linux

Cleanup everything: 

$ make mrproper


Select configuration: 

$ make imx8mq_var_dart_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

Download DDR and HDMI firmware: 

$ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-8.16.bin
$ chmod +x firmware-imx-8.16.bin
$ ./firmware-imx-8.16.bin
$ cp firmware-imx-8.16/firmware/ddr/synopsys/* .
$ cp firmware-imx-8.16/firmware/hdmi/cadence/signed_* .

Download imx_mkimage: 

$ git clone https://github.com/nxp-imx/imx-mkimage -b lf-5.15.32_2.0.0
$ cp imx-mkimage/iMX8M/*.c imx-mkimage/iMX8M/*.sh  imx-mkimage/scripts/*.sh .
$ cp dtb_check.sh ../scripts/

Download and build ATF: 

$ git clone https://github.com/varigit/imx-atf -b lf_v2.6_var01 
$ git clone https://github.com/varigit/meta-variscite-bsp -b kirkstone
$ cd imx-mkimage

$ git apply ../meta-variscite-bsp/recipes-bsp/imx-mkimage/imx-boot/0001-iMX8M-soc-allow-dtb-override.patch
$ git apply ../meta-variscite-bsp/recipes-bsp/imx-mkimage/imx-boot/0002-iMX8M-soc-change-padding-of-DDR4-and-LPDDR4-DMEM-fir.patch
$ cp iMX8M/soc.mak ..
$ cd ..
$ cd imx-atf 
$ source /opt/fslc-xwayland/3.3/environment-setup-cortexa53-crypto-fslc-linux
$ unset LDFLAGS
$ make PLAT=imx8mq bl31
$ cp build/imx8mq/release/bl31.bin ..
$ cd ..

Copy U-Boot binaries: 

$ cp ../tools/mkimage mkimage_uboot
$ cp ../u-boot.bin .
$ cp ../u-boot-nodtb.bin ../spl/u-boot-spl.bin ../arch/arm/dts/imx8mq-var-dart-dt8mcustomboard.dtb .

Build boot image: 

$ make -f soc.mak clean
$ make -f soc.mak SOC=iMX8MQ dtbs=imx8mq-var-dart-dt8mcustomboard.dtb MKIMG=./mkimage_imx8 PAD_IMAGE=./pad_image.sh CC=gcc OUTIMG=imx-boot-sd.bin flash_evk

Install the built U-Boot on an SD card


$ sudo dd if=imx-boot-sd.bin of=/dev/sdX bs=1K seek=33 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 imx-boot-sd.bin /media/rootfs/opt/images/…

And eject the SD card gracefully from host machine.


Note: If you manually upgrade an existing U-Boot, and you have an old environment saved, it is a good idea to reset your environment to the new default (see Environment handling commands)

Update your U-Boot out of Yocto tree

$ git pull
Retrieved from "https://variwiki.com/index.php?title=Yocto_Build_U-Boot&oldid=27023"
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This page was last edited on 13 September 2024, at 15:10.

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