DESK-MX8M-L/Development/Building Boot Image
| HOME | SOMs | SBCs | ToloMEO Embedded Assistant |  GET A QUOTE
|
 ONLINE HELPDESK
|
| Roadmap | IoT Services | ML/AI services | Embedded Design Services |
| History | |||
|---|---|---|---|
| ID# | Issue Date | Notes | |
| 18/02/2022 | First DESK-MX8M-L release | ||
| 24/02/2023 | DESK-MX8M-L-2.0.0 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-2.x.x |
| stable tag | desk-mx8m-l-2.0.0 |
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 bl31.bin, 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 which will 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 -b desk-mx8m-l-2.0.0 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$
- 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_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
This steps produce the u-boot-spl.bin and u-boot.bin files used at the last step.
dvdk@vagrant:~/desk-mx-l/desk-mx8-mkimage/u-boot-imx$ ls -la spl/u-boot-spl.bin -rwxrwxr-x 1 dvdk dvdk 94328 Feb 17 14:56 spl/u-boot-spl.bin dvdk@vagrant:~/desk-mx-l/desk-mx8-mkimage/u-boot-imx$ ls -la u-boot.bin -rw-rw-r-- 1 dvdk dvdk 861312 Feb 17 14:55 u-boot.bin dvdk@vagrant:~/desk-mx-l/desk-mx8-mkimage/u-boot-imx$
Build ATF[edit | edit source]
This process builds the ARM Trusted Firmware: please find more information here
cd imx-atf
- for building the ATF, the following var has to be unset
unset LDFLAGS
Then, build the TF-A binary for the selected platform.
For ORCA SOM:
make PLAT=imx8mp bl31
For MITO 8M Mini SOM:
make PLAT=imx8mm bl31
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 all pieces of software, create the flash.bin boot Image running:
./${BOARD}_generate_flash.bin
where BOARD is: imx8mp-mito8mplus or imx8mm-mito8mmini
For ORCA SOM:
dvdk@vagrant:~/desk-mx-l/desk-mx8-mkimage$ ./imx8mp-mito8mplus_generate_flash.bin Compiling mkimage_imx8 PLAT=imx8mp HDMI=no Compiling mkimage_imx8 gcc -O2 -pipe -g -feliminate-unused-debug-types mkimage_imx8.c -o mkimage_imx8 -lz 23582+0 records in 23582+0 records out 94328 bytes (94 kB, 92 KiB) copied, 0.0379032 s, 2.5 MB/s ./../scripts/dtb_check.sh imx8mp-evk.dtb evk.dtb Use u-boot DTB: imx8mp-evk.dtb ./../scripts/pad_image.sh tee.bin ... ... ... ... ========= OFFSET dump ========= Loader IMAGE: header_image_off 0x0 dcd_off 0x0 image_off 0x40 csf_off 0x2b800 spl hab block: 0x91ffc0 0x0 0x2b800 Second Loader IMAGE: sld_header_off 0x58000 sld_csf_off 0x59020 sld hab block: 0x401fcdc0 0x58000 0x1020 ****************************** ****************************** flash.bin generated successfully write it on a SD card with dd if=flash.bin of=/dev/sdX bs=1k seek=32 conv=fsync ****************************** ****************************** dvdk@vagrant:~/desk-mx-l/desk-mx8-mkimage$
For MITO M8M Mini SOM:
./imx8mm-mito8mmini_generate_flash.bin
