• Privilege mode on CM0+
    CM0+ reference manual said the below. Unprivileged The software:      - xxxx      - xxxx      - Might have restricted access to memory or peripherals. Here, I don't know what is meaning the last line...
  • Best way run driver code in privilege mode?
    I want to write some drivers that run in privilege mode. For example if I have a UART write function I want to make it easy to wrap the write function such that it runs in privilege mode. My thought was...
  • Security Extensions and Privilege Levels
    Introduction In ARM® Cortex®-A class CPUs, the Memory Management Unit (MMU) and Operating System (OS) work together to protect address spaces. A process running in unprivileged mode has its own virtual...
  • Cortex-M0+ privileged/unprivileged extensions
    Hi all, According with ARMv6-M architecture reference manual, it supports two operation modes, handler mode and thread mode. - "execution in handler mode is always privileged." - "execution in...
  • Cortex-M MPU User access to privileged code
    Hi All, I currently want to make use of the MPU. I have several functions which are required to be in privileged mode and are stored in a region set as privileged-read-only, user denied, executable...