• armv8-m mpu: how to mark one region with no any access?
    For the ARMv8M mpu, there is only two bits for the AP(access permission), another XN bit for executable. I wan't to mark a region (e.g. from 0~4096) with no any access, mainly used for NULL pointer...
  • Security State transitions - Processor Mode
    Edit: CONTROL.nPRIV is actually banked so I modified my question Hi, I have a question regarding S/NS state transitions and PE modes. From what I read in the ARMv8-M ARM there is no restriction...
  • Monitor Mode Debug
    I asked this a while back on the old Keil forum, but got no reply. https://community.arm.com/developer/tools-software/tools/f/keil-forum/35230/is-monitor-mode-debug-mmd-supported-with-ulink So perhaps...
  • wfi in debug mode
    Hi, Please help me understand expected behavior of CM4 when CM4 is in debug mode and WFI is executed through single step. Does CM4 enter sleep/sleepdeep in such case ? Thanks, Sandeep
  • secure function call from none-secure side thread mode
    In current trusted-firmware-m version, secure functions such as secure storage service functions can only be called from handler mode. But I have a question about the call sequence, when none secure...