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MPU on ITM Address Range

mcak

Hello,

I am trying to enable MPU on peripherals to allow them only for only privileged access and trying to access from an unprivileged thread.

All address range works well except ITM(Instrumentation Trace Macrocell) address space. 

I am working on STM32F429-Cortex M4, I am not sure is it about ST's MCU or Arm Cortex M Core

I am setting the MPU for the whole peripheral range at a time.

The ITM address is 0xE0000000

If "address < 0xE0000000" MPU Works
If "0xE0000000 < address < 0xE0010000" Unprivileged Thread Can Read : FAILURE
If "0xE0010000 < address < 0xE0100000" BUS Fault
If "0xE0100000 < address" MPU Works

Is there any limitation on MPU for ITM address space?

Kind Regards,

Murat