The FwST-M Packages encompass the following components:
- The boot chain based on MCUboot (FSBL-M) running on the Arm® Cortex®-M in secure mode, only for M33-TD flavor
of STM32MP2 series / Yocto-based OpenSTLinux embedded software . - The TF-M secure OS running on the Arm® Cortex®-M in secure mode. It provides local secure services to STM32Cube MPU Package. Only for STM32MP2 series / Yocto-based OpenSTLinux embedded software .
- The STM32CubeMPU Packages running on the Arm® Cortex®-M in nonsecure mode
The figure below is clickable so that the user can directly jump to one of the sub-levels listed above.

FwST-M Packages architecture overview