Difference between revisions of "How to manage OpenSTLinux projects in STM32CubeIDE/eMMC update with customized trusted image"

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Applicable for STM32MP15x lines

This article gives details about updating the bootloader objects of eMMC memory, located onto STM32MP157x-EV1 (e.g.), using STM32CubeIDE.

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1 Overview[edit]

The different steps to update eMMC with customized trusted image are the following ones:

  • Initialize the eMMC with Starter Package image thanks to STM32CubeProgrammer.
  • Within STM32CubeIDE:
    • customize the trusted image, thanks to embedded STM32CubeMX generating device trees
    • compile corresponding Linux® device tree & bootloader images
    • update them on running STM32MP15 board
  • Check the new customization is correctly set up

All those steps are explained in chapters below.

2 Initialize eMMC with Starter Package[edit]

Initialize the eMMC with Starter Package image thanks to STM32CubeProgrammer.
For that select the Starter package corresponding to the targeted STM32MP1 board and jump to chapter Downloading the image and flashing it on the board (e.g. here for STM32MP15 Evaluation board).

Before executing the next step, check the bootloader version, visible in boot messages:

  • TF-A BL2 version, booting from eMMC memory
eMMC initial setting: TF-A BL2 version


  • U-boot version & extlinux.conf file used, booting from eMMC memory
eMMC initial setting: U-boot version & extlinux.conf
  • extlinux.conf content before update
eMMC initial setting: extlinux.conf content


3 Customize bootloader images and update them on running STM32MP15 board[edit]

3.1 Build the trusted image inside STM32CubeIDE with the new expected device trees[edit]

After customization of hardware resources within embedded STM32CubeMX, new device trees for Linux® and for bootloader are generated.
Next step is to build an update of the new trusted image; this is covered also within STM32CubeIDE with:

Note that for Linux®, only device tree has to be updated as described hereafter.

3.2 STM32MP1 board update with new Linux® device tree[edit]

In this step, STM32MP15 board is up and running with network access: target status is green. After having compiled device tree generated by STM32CubeMX , you need to :

  • update MP15 target bootfs with new .dtb under /boot
  • and adjust /boot/mmc1_extlinux/extlinux.conf in order to declare new device tree and set it as default.

For that, follow steps explained below:

  • select the Cortex-A Linux® Deployment shortcut configuration available from Linux® project Run As... menu.
Linux® deployment configuration


  • Validate your choice and use Run button. You get in a dedicated Linux® Deployment console a message like this:
eMMC Linux® deployment message


  • Check extlinux.conf content after eMMC Linux® device tree update (DEFAULT and LABEL have changed)
eMMC Linux® device tree update


3.3 STM32MP1 board update with new bootloader images[edit]

In this step, STM32MP15 board is up and running with network access: target status is green.
After having built customized bootloader images, you need to update STM32MP1 board.

  • Select Cortex-A project in STM32CubeIDE and click right to get Cortex-A Bootloader Deployment shortcut.
Bootloader update shortcut


Connection is automatically set and you need to scan STM32MP15 target storage, thanks to Scan... button.
This storage list depends on the board and on the used boot storage.

Then, select the storage to update (EMMC #0 here) and the TF-A BL2 & FIP image to update from FIP_artifacts/ .
Here is the corresponding STM32 Cortex-A Bootloader Deployment configuration:

eMMC Bootloader deployment configuration


  • Click on Run, you get in a dedicated Bootloader Deployment console following message:
eMMC Bootloader deployment message


4 Check new bootloader version after customization with STM32CubeIDE[edit]

After the update, the new bootloader version can be checked by comparing version appearing in boot messages  : TF-A BL2 and U-Boot versions are modified and Linux® uses the generated device tree.
Here are the new boot messages :

  • TF-A BL2 updated version, booting from eMMC memory
eMMC updated TF-A BL2 version


  • U-Boot updated version & Linux® device tree, booting from eMMC memory
eMMC updated U-Boot version & Linux® device tree


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<noinclude>{{ApplicableFor
| MPUs list=STM32MP15x
| MPUs checklist=STM32MP13x, STM32MP15x}}</noinclude>

{{ClonedFrom|stm32mpuv3}}
This article gives details about updating the bootloader objects of eMMC memory, located onto STM32MP157x-EV1 (e.g.), using STM32CubeIDE.

[[File:BackToNavigationTree button.png|200px|link=How to manage OpenSTLinux projects in STM32CubeIDE]]
==Overview==
The different steps to update eMMC with customized trusted image are the following ones:
* Initialize the eMMC with Starter Package image thanks to STM32CubeProgrammer. 
* Within STM32CubeIDE:
** customize the trusted image, thanks to embedded STM32CubeMX generating device trees
** compile corresponding Linux<sup>®</sup> device tree & bootloader images 
** update them on running STM32MP15 board  
* Check the new customization is correctly set up

All those steps are explained in chapters below.

==Initialize eMMC with Starter Package==
Initialize the eMMC with [[:Category:Starter_Package | Starter Package]] image thanks to [[STM32CubeProgrammer]].<br>

For that select the Starter package corresponding to the targeted STM32MP1 board and jump to chapter [[STM32MP15_Evaluation_boards_-_Starter_Package#Downloading_the_image_and_flashing_it_on_the_board| Downloading the image and flashing it on the board ]] (e.g. here for STM32MP15 Evaluation board). 

Before executing the next step, check the bootloader version, visible in ''boot messages'':

* TF-A BL2 version, booting from eMMC memory
[[File:EM-before-1.png|center|frame|eMMC initial setting: TF-A BL2 version| link=]]

* U-boot version & extlinux.conf file used, booting from eMMC memory
[[File:EM-before-2.png|center|frame|eMMC initial setting: U-boot version & extlinux.conf| link=]]

* extlinux.conf content before update
[[File:EM-before-3.png|center|frame|eMMC initial setting: extlinux.conf content| link=]]

==Customize bootloader images and update them on running STM32MP15 board==
===Build the ''trusted image'' inside STM32CubeIDE with the new expected device trees===
After customization of hardware resources within embedded STM32CubeMX, new device trees for Linux<sup>®</sup> and for bootloader are generated. <br>

Next step is to build an update of the new trusted image; this is covered also within STM32CubeIDE with:
* bootloader images generation, as explained in [[How to manage OpenSTLinux projects in STM32CubeIDE#Bootloader_projects]]
* and Linux<sup>®</sup> device tree compilation [[How_to_manage_OpenSTLinux_projects_in_STM32CubeIDE#Linux_project]]

Note that for Linux<sup>®</sup>, only device tree has to be updated as described hereafter. 

===STM32MP1 board update with new Linux<sup>®</sup> device tree===
In this step, STM32MP15 board is up and running with network access: [[How to use the Target Status widget in STM32CubeIDE|target status]] is green.
After having compiled device tree generated by STM32CubeMX , you need to :
* update MP15 target bootfs with new '''''.dtb''''' under '''''/boot'''''  
* and adjust '''''/boot/mmc1_extlinux/extlinux.conf''''' in order to declare new device tree and set it as default.  

For that, follow steps explained below:
* select the '''''Cortex-A Linux<sup>®</sup> Deployment''''' shortcut configuration available from Linux<sup>®</sup> project '''''Run As...''''' menu.
[[File:EM-init-1.png|850px|center|Linux<sup>®</sup> deployment configuration| link=]]

*Validate your choice and use '''''Run''''' button. You get in a dedicated '''''Linux<sup>®</sup> Deployment''''' console a message like this:
[[File:EM-init-2.png|850px|center|eMMC Linux<sup>®</sup> deployment message |link= ]]

*Check extlinux.conf content after eMMC Linux<sup>®</sup> device tree update (DEFAULT  and LABEL have changed)
[[File:EM-init-3.png|600px|center|eMMC Linux<sup>®</sup> device tree update |link=]]

===STM32MP1 board update with new bootloader images===
In this step, STM32MP15 board is up and running with network access: [[How to use the Target Status widget in STM32CubeIDE|target status]] is green.<br>

After having built customized bootloader images, you need to update STM32MP1 board.

* Select Cortex-A project in STM32CubeIDE and click  right to get '''''Cortex-A Bootloader Deployment''''' shortcut. 
[[File:SD-init-0.png|750px|center|Bootloader update shortcut]]


Connection is automatically set and you need to scan STM32MP15 target storage, thanks to '''''Scan...''''' button.<br> 

This storage list depends on the board and on the used boot storage.

Then, select the storage to update (EMMC #0 here) and the TF-A BL2 & FIP image to update from FIP_artifacts/ .  <br>

Here is the corresponding ''STM32 Cortex-A Bootloader Deployment'' configuration:
[[File:EM-init-4.png|750px|center|eMMC Bootloader deployment configuration| link=]]

* Click on '''''Run''''', you get in a dedicated '''''Bootloader Deployment''''' console following message: 
[[File:EM-init-5.png|750px|center|eMMC Bootloader deployment message| link=]]

==Check new bootloader version after customization with STM32CubeIDE==
After the update, the new bootloader version can be checked by comparing version appearing in ''boot messages''  :   TF-A BL2 and U-Boot versions are modified and Linux<sup>®</sup> uses the generated device tree. <br>

Here are the new ''boot messages'' :

* TF-A BL2 updated version,  booting from eMMC memory
[[File:EM-after-1.png|600px|center|eMMC updated TF-A BL2 version| link=]]

* U-Boot updated version & Linux<sup>®</sup> device tree, booting from eMMC memory
[[File:EM-after-2.png|600px|center|eMMC updated U-Boot version & Linux<sup>®</sup> device tree| link=]]

[[File:BackToNavigationTree button.png|200px|link=How to manage OpenSTLinux projects in STM32CubeIDE]]
(No difference)