CONFIG_ARM_MPU_REGION_MIN_ALIGN_AND_SIZE

(No prompt – not directly user assignable.)

Type: int

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.

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 && ARM) || (CPU_HAS_MPU && CPU_AARCH64_CORTEX_R && ARM64)

(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
64 if ARM_MPU
4

Kconfig definitions

At <Architecture>/arm/core/aarch32/mpu/Kconfig:46

Included via Kconfig:8 → Kconfig.zephyr:39 → <Architecture>/Kconfig:12 → <Architecture>/arm/Kconfig:57 → <Architecture>/arm/core/aarch32/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 && 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.

At <Architecture>/arm64/core/cortex_r/Kconfig:44

Included via Kconfig:8 → Kconfig.zephyr:39 → <Architecture>/Kconfig:12 → <Architecture>/arm64/Kconfig:32 → <Architecture>/arm64/core/Kconfig:142

Menu path: (Top) → ARM64 Options

config ARM_MPU_REGION_MIN_ALIGN_AND_SIZE
    int
    default 64 if ARM_MPU
    default 4
    depends on CPU_HAS_MPU && CPU_AARCH64_CORTEX_R && ARM64
    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.)