OpenSTLinux architecture overview

The OpenSTLinux distribution encompasses the following components:

• The OpenSTLinux BSP that offers services, to the application frameworks in the same context, from:
  • The boot chain based on TF-A and U-Boot
  • The OP-TEE secure OS running on the Cortex-A in secure mode
  • The Linux^® kernel running on the Arm^® Cortex^®-A in non-secure mode
• The Application frameworks that rely on the services provided by the OpenSTLinux BSP, to provide particular functionalities (code libraries, APIs, tool sets...) to facilitate the development of software applications:
  • The Linux application frameworks (aka Linux middlewares) running on the user space of the Linux OS: e.g. libusb C library for a generic access to USB devices, ALSA user-space bundle for audio functionalities, GStreamer multimedia framework...
  • The OP-TEE application frameworks running on the user space of the secure OS: e.g. TEE Internal core API for the development of Trusted Applications (TA)
  • The U-Boot application frameworks: e.g. configuration scripts

The figure below is clickable so that the user can directly jump to one of the sub-levels listed above.

Zoom out to STM32MPU Embedded Software

OpenSTLinux architecture overview

Board support package

Trusted Firmware for Arm Cortex-A

Das U-Boot -- the Universal Boot Loader (see U-Boot_overview)

Open Portable Trusted Execution Environment

Operating System

also known as

Advanced Linux sound architecture

Trusted Execution Environment

Application programming interface

Trusted Application