DESK-MX8M-L/Development/Building Boot Image
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| Version | Issue Date | Notes | |
| 1.0.0 | Feb 2022 | First DESK-MX8M release | |
Contents
Building Boot Image[edit | edit source]
Quick reference[edit | edit source]
| Repository Information | |
|---|---|
| URL | git@git.dave.eu:desk-mx-l/desk-mx8-mkimage.git |
| stable branch | desk-mx8m-l-rel-2.0.0 |
| stable tag | desk-mx8m-l-2.0.0-rc2 |
i.MX8 Boot Image[edit | edit source]
The System Controller Unit (SCU) represents the evolution of centralized control for system-level resources on i.MX8. The heart of the system controller is a Cortex-M4 that executes System Controller Firmware. The SCF is an essential part of the i.MX8 architecture. Please find more information about SCF here.
TF-A binary, scfw_tcm.bin and u-boot.bin are combined together to generate a binary file called flash.bin; the imx-mkimage tool is used to generate flash.bin, and flash.bin needs to be flashed into the bootable storage device.
In the following paragraphs we will explain how to get or build those binaries to be combined in a single binary to be flashed in the bootable storage device.
Instructions[edit | edit source]
It is assumed that the development environment has been set up properly as described here.
- start the Linux development VM and login into the system
- open a terminal window and cd into
desk-mx-ldirectory
cd desk-mx-l
Clone the repositories[edit | edit source]
- clone recursively the Boot repositories
dvdk@vagrant:~/desk-mx-l$ git clone --recursive git@git.dave.eu:desk-mx-l/desk-mx8-mkimage.git Cloning into 'desk-mx8-mkimage'... remote: Enumerating objects: 57, done. remote: Total 57 (delta 0), reused 0 (delta 0), pack-reused 57 Receiving objects: 100% (57/57), 7.14 KiB | 7.14 MiB/s, done. Resolving deltas: 100% (28/28), done. dvdk@vagrant:~/desk-mx-l$
- checkout the required branch
git checkout desk-mx8m-l-rel-2.0.0
- update the submodule (i.e. sync the sub-repositories)
dvdk@vagrant:~/desk-mx-l/desk-mx8-mkimage$ git submodule update Cloning into '/home/dvdk/desk-mx-l/desk-mx8-mkimage/imx-atf'... Cloning into '/home/dvdk/desk-mx-l/desk-mx8-mkimage/imx-mkimage'... Cloning into '/home/dvdk/desk-mx-l/desk-mx8-mkimage/u-boot-imx'... Submodule path 'imx-atf': checked out 'a72158b5e10527b9e13a64f8305b4210423fa09b' Submodule path 'imx-mkimage': checked out '8947fea369ab3932259630232cfb9f87b8f9dda1' Submodule path 'u-boot-imx': checked out '2af0221006d686ae561a68f324c56bf2da3953ad' dvdk@vagrant:~/desk-mx-l/desk-mx8-mkimage$
In case of ca-certificates failures, which may appears during https access to some repo:
fatal: unable to access 'https://source.codeaurora.org/external/imx/imx-mkimage.git/': server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none fatal: clone of 'https://source.codeaurora.org/external/imx/imx-mkimage.git' into submodule path '/home/dvdk/desk-mx-l/desk-mx8-mkimage/imx-mkimage' failed Failed to clone 'imx-mkimage'. Retry scheduled ...
a possible solution is to disable the SSL verification setting:
export GIT_SSL_NO_VERIFY=1
Enable the cross-compilation[edit | edit source]
- configure the build environment for cross-compilation
source /home/dvdk/desk-mx-l/desk-mx8m-l-2.0.0-rc2_env.sh
Build U-Boot[edit | edit source]
First step is to build U-Boot binaries: the same instructions can be found in the dedicated wiki page
cd u-boot-imx
- select the proper
defconfigand start the make compilation
make imx8mp_mito8mplus_defconfig make
Build ATF[edit | edit source]
This process builds the ARM Trusted Firmware: please find more information here
cd imx-atf
Please note that this is usually a generic command that generates all required binaries (kernel + device trees) for the different platform. In other words: it is not usually required to specify a different target depending on specific board configuration.
Get i.MX firmware[edit | edit source]
This will download the binary archive, accept EULA automatically (you must agree with that) and extract the archive itself
dvdk@vagrant:~/desk-mx-l/desk-mx8-mkimage$ ./fetch_firmware.sh --2022-02-17 11:37:24-- https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-8.10.bin Resolving www.nxp.com (www.nxp.com)... 104.120.105.182 Connecting to www.nxp.com (www.nxp.com)|104.120.105.182|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 1467137 (1.4M) [application/octet-stream] Saving to: ‘firmware-imx-8.10.bin’ firmware-imx-8.10.bin 100%[=====================================================================================================>] 1.40M 4.63MB/s in 0.3s 2022-02-17 11:37:25 (4.63 MB/s) - ‘firmware-imx-8.10.bin’ saved [1467137/1467137] Welcome to NXP firmware-imx-8.10.bin WARNING: EULA has been auto-accepted; this implies that you agree with it. Unpacking file .......................................................................... done dvdk@vagrant:~/desk-mx-l/desk-mx8-mkimage$
Generate Boot image[edit | edit source]
After building the single pieces of software, run:
./${BOARD}_generate_flash.bin
where BOARD is: imx8mp-mito8mplus or imx8mm-mito8mmini
For ORCA:
dvdk@vagrant:~/desk-mx-l/desk-mx8-mkimage$ ./imx8mp-mito8mplus_generate_flash.bin ... ... dvdk@vagrant:~/desk-mx-l/desk-mx8-mkimage$
