Unknown Cortex-M core on embassy-stm32::hsem::get_current_coreid() using an stm32h755

[Ragarnoy]

I'm trying to use hardware semaphores on the nucleo H755ZI-Q, sadly it seems there might be an issue with how hardware semaphores are implemented, my core id does not match the accepted core ids defined in the codebase basically

Plainly put:

    let cpuid = unsafe { cortex_m::peripheral::CPUID::PTR.read_volatile().base.read() };
    info!("CM7: CPUID=0X{:x}", cpuid & 0x000000F0);

gives me INFO CM7: CPUID=0X70
however get_current_core_id() only allows those values, or panics

pub fn get_current_coreid() -> CoreId {
    let cpuid = unsafe { cortex_m::peripheral::CPUID::PTR.read_volatile().base.read() };
    match cpuid & 0x000000F0 {
        #[cfg(any(stm32wb, stm32wl))]
        0x0 => CoreId::Core1,

        #[cfg(not(any(stm32h745, stm32h747, stm32h755, stm32h757)))]
        0x4 => CoreId::Core0,

        #[cfg(any(stm32h745, stm32h747, stm32h755, stm32h757))]
        0x4 => CoreId::Core1,

        #[cfg(any(stm32h745, stm32h747, stm32h755, stm32h757))]
        0x7 => CoreId::Core0,
        _ => panic!("Unknown Cortex-M core"),
    }
}

Unless I'm using this feature incorrectly, this seems like a bug

[gentoid]

I can confirm. I had to change code as follows to make it working for my STM32H755ZI6 Nucleo board.

        #[cfg(any(stm32h745, stm32h747, stm32h755, stm32h757))]
        0x40 => CoreId::Core1,

        #[cfg(any(stm32h745, stm32h747, stm32h755, stm32h757))]
        0x70 => CoreId::Core0,