Help¶

Minimum size (and alignment) of an ARM MPU region. Use this symbol to guarantee minimum size and alignment of MPU regions. A minimum 4-byte alignment is enforced in ARM builds without support for Memory Protection.

Direct dependencies¶

CPU_HAS_MPU && CPU_CORTEX_M && !ARM64 && ARM

(Includes any dependencies from ifs and menus.)

Defaults¶

256 if ARM_MPU && ARMV6_M_ARMV8_M_BASELINE && !ARMV8_M_BASELINE
32 if ARM_MPU
4

Kconfig definition¶

At arch/arm/core/aarch32/cortex_m/mpu/Kconfig:46

Included via Kconfig:8 → Kconfig.zephyr:29 → arch/Kconfig:12 → arch/arm/Kconfig:42 → arch/arm/core/aarch32/Kconfig:237 → arch/arm/core/aarch32/cortex_m/Kconfig:308

Menu path: (Top) → ARM Options

config ARM_MPU_REGION_MIN_ALIGN_AND_SIZE
    int
    default 256 if ARM_MPU && ARMV6_M_ARMV8_M_BASELINE && !ARMV8_M_BASELINE
    default 32 if ARM_MPU
    default 4
    depends on CPU_HAS_MPU && CPU_CORTEX_M && !ARM64 && ARM
    help
      Minimum size (and alignment) of an ARM MPU region. Use this
      symbol to guarantee minimum size and alignment of MPU regions.
      A minimum 4-byte alignment is enforced in ARM builds without
      support for Memory Protection.

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)