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

use STM32F4 CCM memory for the stack and the heap

Thank You very much!

But is some additive issues for this.

If We use memalloc, getmem and etc... we will have problems after change stack to CCM, because function _sbr from syscalls.c is not correct developed. OMG!


caddr_t _sbrk(int incr)
extern char end asm(“end”);
static char *heap_end;
char *prev_heap_end;

if (heap_end == 0)
heap_end = &end;

prev_heap_end = heap_end;
if (heap_end + incr > stack_ptr)
// write(1, “Heap and stack collision\n”, 25);
// abort();
errno = ENOMEM;
return (caddr_t) -1;

heap_end += incr;

return (caddr_t) prev_heap_end;
// where stack_ptr is alias for SP register


Heap end compared with current SP!!! OMG!!! program with this _sbr() can work only if you have exceed memory...

ST developers! please do someting ;)