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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 (registration required) various documents highlighting:

System Workbench for STM32


Debug only works after chip erase in ST-LINK utility

Yes, the workarea in ram is used to program the flash.
But the bigger it is and the longer the flash programming is and the STM32L0 are long to program (compares to other STM32F) so there were some errors on swd communication.
As i said, It has been corrected.

And even in the meantime, the L0 cfg has a reduced workarea size of 2K (0x800). So, not even 4K (0x1000).

So, if it is still not working now using SW4STM32 v2.2.0, let us know.

Rgds,
Laurent