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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


Flash write failed when connecting to STM32H753IIK

I found assembly code stm32h7x.S is actually setting PG bit as following.

define STM32_CR_PROG 0x00000032 /* PSIZE64 | PG */
// ...
mov r6, #STM32_CR_PROG
str r6, r4, #STM32_FLASH_CR_OFFSET

I’m confused.

I’m waiting for an analysis by specialists.

Regards,
Atsushi