SW4STM32 and SW4Linux fully supports the STM32MP1 asymmetric multicore Cortex/A7+M4 MPUs

   With System Workbench for Linux, Embedded Linux on the STM32MP1 family of MPUs from ST was never as simple to build and maintain, even for newcomers in the Linux world.
And, if you install System Workbench for Linux in System Workbench for STM32 you can seamlessly develop and debug asymmetric applications running partly on Linux, partly on the Cortex-M4.
You can get more information from the ac6-tools website and download two short videos (registration required) highlighting:

System Workbench for STM32

Reinstalling STM32F745G-DISCO Demo


The only problem is that the debugger (gdb+openocd) cannot program the content located within the external flash memory.

Otherwise when debugging your application (after loading the hex using ST-LINK UTILITY) you can disable the programming step (Debug Configurations > $Your_Config$ > Startup ⇒ uncheck ‘Load image’ checkbox), so the debugger will connnect to your device without reprogramming the application.

If you want to display the external memory content, this is possible if the external memory is initialized.
In other words: you can read the external memory content after your application initializes the external memory.