Description

From #18446 (comment):

Side note - is there a way for user C/C++ modules to detect and respond to soft resets?

No, but that would be a good thing to add. Maybe something like MP_REGISTER_SOFT_RESET_HOOK? That would add to an array of soft reset callbacks.

Would also be great to have hooks for initialization, similar to MICROPY_BOARD_STARTUP and MICROPY_BOARD_EARLY_INIT. Example for motivation, I have this module implementation that needs to know when the GC has been initialized so memory can be allocated in the C heap before, or in the GC pool after.

Code Size

Would have zero code side increase for builds that do not need this feature, can be optionally enabled.

Implementation

I hope the MicroPython maintainers or community will implement this feature

Code of Conduct

Yes, I agree