:orphan:

.. title:: CONFIG_MPU_STACK_GUARD_MIN_SIZE_FLOAT

.. kconfig:: CONFIG_MPU_STACK_GUARD_MIN_SIZE_FLOAT

CONFIG_MPU_STACK_GUARD_MIN_SIZE_FLOAT
#####################################

*(No prompt -- not directly user assignable.)*

Type: ``int``

Help
====

.. code-block:: none

    Minimum size (and alignment when applicable) of an ARM MPU
    region, which guards the stack of a thread that is using the
    Floating Point (FP) context. The width of the guard is set to
    128, to accommodate the length of a Cortex-M exception stack
    frame when the floating point context is active. The FP context
    is only stacked in sharing FP registers mode, therefore, the
    option is applicable only when FPU_SHARING is selected.

Direct dependencies
===================

\ :kconfig:`MPU_STACK_GUARD <CONFIG_MPU_STACK_GUARD>` && \ :kconfig:`FPU_SHARING <CONFIG_FPU_SHARING>` && \ :kconfig:`ARM_MPU <CONFIG_ARM_MPU>` && \ :kconfig:`CPU_HAS_MPU <CONFIG_CPU_HAS_MPU>` && \ :kconfig:`ARM <CONFIG_ARM>`

*(Includes any dependencies from ifs and menus.)*

Default
=======

- 128

Kconfig definition
==================



At ``<Zephyr Architecture>/arm/core/aarch32/mpu/Kconfig:64``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:39`` → ``<Zephyr Architecture>/Kconfig:12`` → ``<Zephyr Architecture>/arm/Kconfig:57`` → ``<Zephyr Architecture>/arm/core/aarch32/Kconfig:297``

Menu path: (Top) → ARM Options → Thread Stack Guards

.. code-block:: kconfig

    config MPU_STACK_GUARD_MIN_SIZE_FLOAT
    	int
    	default 128
    	depends on MPU_STACK_GUARD && FPU_SHARING && ARM_MPU && CPU_HAS_MPU && ARM
    	help
    	  Minimum size (and alignment when applicable) of an ARM MPU
    	  region, which guards the stack of a thread that is using the
    	  Floating Point (FP) context. The width of the guard is set to
    	  128, to accommodate the length of a Cortex-M exception stack
    	  frame when the floating point context is active. The FP context
    	  is only stacked in sharing FP registers mode, therefore, the
    	  option is applicable only when FPU_SHARING is selected.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*