Is there any documentation about the different OpenSt-Linux FlashLayouts?

[A.M.]

Hello,

Whenever I build OpenSt-Linux with Yocto, or download the starter kit, I get several flashlayouts:

In images/stm32mp2/flashlayout_st-image-weston:

* extensible

* fastboot

* fastboot-opteemin

* optee

* opteemin

I can make some supposition about: optee, opteemin being a simplified or lighter version of optee, etc.

Is there any documentation about:

* What are the purpose of each layout
* What are the differences between them
* Links to documentation about related technologies
* ...

[Olivier GALLIEN]

Hi @A.M. ,

Sorry, I agree information is not written in a single place in our wiki. 

Some information can be found here

STM32MP25 Evaluation boards - Starter Package - stm32mpu

 

flashlayout_st-image-weston Flash layout files (description of the partitions) for the supported boot chains on supported boot devices and boards
│ ├── [...]
│ ├── extensible Flash layout files for microSD card boot device with no userfs partition but a rootfs partition extended to microSD card size
│ │ ├── FlashLayout_sdcard_stm32mp235f-dk-extensible.tsv (recommended setup for package repository service) microSD card boot device with rootfs partition extended to microSD card size for STM32MP235F-DK → STM32MP23 Discovery kits
│ │ ├── FlashLayout_sdcard_stm32mp257f-dk-extensible.tsv (recommended setup for package repository service) microSD card boot device with rootfs partition extended to microSD card size for STM32MP257F-DK → STM32MP25 Discovery kits
│ │ └── [...]
│ ├── fastboot Flash layout files for flashing via fastboot
│ │ ├── FlashLayout_emmc_stm32mp235f-dk-fastboot.tsv eMMC boot device for STM32MP235F-DK → STM32MP23 Discovery kits
│ │ ├── FlashLayout_sdcard-EFI_stm32mp235f-dk-fastboot.tsv microSD card boot device with EFI for STM32MP235F-DK → STM32MP23 Discovery kits
│ │ ├── FlashLayout_sdcard_stm32mp235f-dk-fastboot.tsv microSD card boot device for STM32MP235F-DK → STM32MP23 Discovery kits
│ │ ├── FlashLayout_emmc_stm32mp257f-dk-ca35tdcid-ostl-fastboot.tsv eMMC boot device for STM32MP257F-DK OSTL → STM32MP25 Discovery kits
│ │ ├── FlashLayout_emmc_stm32mp257f-dk-fastboot.tsv eMMC boot device for STM32MP257F-DK → STM32MP25 Discovery kits
│ │ ├── FlashLayout_emmc_stm32mp257f-ev1-ca35tdcid-ostl-fastboot.tsv eMMC boot device for STM32MP257F-EV1 → STM32MP25 Evaluation kits
│ │ ├── FlashLayout_emmc_stm32mp257f-ev1-fastboot.tsv eMMC boot device for STM32MP257F-EV1 → STM32MP25 Evaluation kits
│ │ ├── FlashLayout_sdcard-EFI_stm32mp257f-dk-ca35tdcid-ostl-fastboot.tsv microSD card boot device with EFI for STM32MP257F-DK OSLT → STM32MP25 Discovery kits
│ │ ├── FlashLayout_sdcard-EFI_stm32mp257f-dk-fastboot.tsv microSD card boot device with EFI for STM32MP257F-DK → STM32MP25 Discovery kits
│ │ ├── FlashLayout_sdcard-EFI_stm32mp257f-ev1-ca35tdcid-ostl-fastboot.tsv microSD card boot device with EFI for STM32MP257F-EV1 OSLT → STM32MP25 Evaluation kits
│ │ ├── FlashLayout_sdcard-EFI_stm32mp257f-ev1-fastboot.tsv microSD card boot device with EFI for STM32MP257F-EV1 → STM32MP25 Evaluation kits
│ │ ├── FlashLayout_sdcard_stm32mp257f-dk-ca35tdcid-ostl-fastboot.tsv microSD card boot device for STM32MP257F-DK OSLT → STM32MP25 Discovery kits
│ │ ├── FlashLayout_sdcard_stm32mp257f-dk-fastboot.tsv microSD card boot device for STM32MP257F-DK → STM32MP25 Discovery kits
│ │ ├── FlashLayout_sdcard_stm32mp257f-ev1-ca35tdcid-ostl-fastboot.tsv microSD card boot device for STM32MP257F-EV1 OSLT → STM32MP25 Evaluation kits
│ │ ├── FlashLayout_sdcard_stm32mp257f-ev1-fastboot.tsv microSD card boot device for STM32MP257F-EV1→ → STM32MP25 Evaluation kits
│ │ └── [...]
│ └── optee Flash layout files for optee boot chain
│ ├── FlashLayout_emmc_stm32mp235f-dk-optee.tsv eMMC boot device for STM32MP235F-DK → STM32MP23 Discovery kits
│ ├── FlashLayout_sdcard_stm32mp235f-dk-optee.tsv microSD card boot device for STM32MP235F-DK → STM32MP23 Discovery kits
│ ├── FlashLayout_emmc_stm32mp257f-ev1-optee.tsv eMMC boot device for STM32MP257F-EV1 → STM32MP25 Evaluation boards
│ ├── FlashLayout_nor-sdcard_stm32mp257f-ev1-optee.tsv NOR boot device and microSD card device for STM32MP257F-EV1 → STM32MP25 Evaluation boards
│ ├── FlashLayout_sdcard_stm32mp257f-ev1-optee.tsv microSD card boot device for STM32MP257F-EV1 → STM32MP25 Evaluation boards
│ └── [...]

 But likely require further details.

In short : 

* extensible

As written above. Rootfs size is defined to maximum size available, allowing to install huge software packet through apt-get. 

* fastboot

Image support U-Boot Fastboot feature allowing experimentation of PRG-TOOLBOX open-source programmer tool. 

* optee / opteemin

Related to secure profile see :

https://wiki.st.com/stm32mpu/wiki/STM32MPU_OP-TEE_profiles

Hope it help waiting for Wiki enhancement 

Olivier 

 

 

[A.M.]

1) Fastboot: we refer to the Android Fastboot (https://docs.u-boot.org/en/latest/android/fastboot-protocol.html) and (https://github.com/STMicroelectronics/STM32PRG-TOOLBOX-DFU)

2) And for the ***min versions: I suppose that it's a smaller image with less linux packages installed, but that does not limit or reduce the Optee possibilities.

3) Does sdcard versions work for USB bootable device?

4) What is the difference between :
*opteemin.sv
*ca35tdcid-ostl-opteemin.tsv
*ca35tdcid-ostl-m33-examples-opteemin.tsv
*ca35tdcid-ostl-m33-examples-sram-opteemin.tsv

Are them just the same image with a different set of examples on it?

6) Why are there no optee / opteemin / fastboot version of the extensible? And why is only present the -dk- and not the ev1 board?