:orphan:

.. title:: CONFIG_MAIN_STACK_SIZE

.. kconfig:: CONFIG_MAIN_STACK_SIZE

CONFIG_MAIN_STACK_SIZE
######################

*Size of stack for initialization and main thread*

Type: ``int``

Help
====

.. code-block:: none

    When the initialization is complete, the thread executing it then
    executes the main() routine, so as to reuse the stack used by the
    initialization, which would be wasted RAM otherwise.

    After initialization is complete, the thread runs main().

Defaults
========

- 4096
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 2048
- 4096 if \ :kconfig:`64BIT <CONFIG_64BIT>`
- 4096
- 4096 if \ :kconfig:`64BIT <CONFIG_64BIT>`
- 4096 if \ :kconfig:`COVERAGE_GCOV <CONFIG_COVERAGE_GCOV>`
- 2048
- 8192
- 2048 if \ :kconfig:`COVERAGE_GCOV <CONFIG_COVERAGE_GCOV>`
- 1024 if \ :kconfig:`TEST_ARM_CORTEX_M <CONFIG_TEST_ARM_CORTEX_M>`
- 512 if \ :kconfig:`ZTEST <CONFIG_ZTEST>` && !(\ :kconfig:`RISCV <CONFIG_RISCV>` || \ :kconfig:`X86 <CONFIG_X86>`)
- 1024

Kconfig definitions
===================



At ``<Zephyr Boards>/arm/mps2_an385/Kconfig.defconfig:49``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:22``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 4096
    	depends on COVERAGE && BOARD_MPS2_AN385

----

At ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em4:30``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:25`` → ``<BuildDir>/kconfig/Kconfig.soc.defconfig:1`` → ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:14``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_EMSDP_EM4 && SOC_ARC_EMSDP

----

At ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em5d:30``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:25`` → ``<BuildDir>/kconfig/Kconfig.soc.defconfig:1`` → ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:15``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_EMSDP_EM5D && SOC_ARC_EMSDP

----

At ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em6:30``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:25`` → ``<BuildDir>/kconfig/Kconfig.soc.defconfig:1`` → ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:16``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_EMSDP_EM6 && SOC_ARC_EMSDP

----

At ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em7d:30``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:25`` → ``<BuildDir>/kconfig/Kconfig.soc.defconfig:1`` → ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:17``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_EMSDP_EM7D && SOC_ARC_EMSDP

----

At ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em9d:30``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:25`` → ``<BuildDir>/kconfig/Kconfig.soc.defconfig:1`` → ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:19``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_EMSDP_EM9D && SOC_ARC_EMSDP

----

At ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em11d:30``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:25`` → ``<BuildDir>/kconfig/Kconfig.soc.defconfig:1`` → ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:20``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_EMSDP_EM11D && SOC_ARC_EMSDP

----

At ``<Zephyr SoC>/arc/snps_emsk/Kconfig.defconfig.em7d:43``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:25`` → ``<BuildDir>/kconfig/Kconfig.soc.defconfig:1`` → ``<Zephyr SoC>/arc/snps_emsk/Kconfig.defconfig:10``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on ARC_MPU_VER = 2 && SOC_EMSK_EM7D && SOC_EMSK

----

At ``<Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig.em:41``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:25`` → ``<BuildDir>/kconfig/Kconfig.soc.defconfig:1`` → ``<Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig:12``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on ARC_MPU_VER = 2 && SOC_NSIM_EM && SOC_NSIM

----

At ``<Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig.em7d_v22:38``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:25`` → ``<BuildDir>/kconfig/Kconfig.soc.defconfig:1`` → ``<Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig:13``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on ARC_MPU_VER = 2 && SOC_NSIM_EM7D_V22 && SOC_NSIM

----

At ``<Zephyr SoC>/riscv/riscv-privilege/andes_v5/Kconfig.defconfig.ae350:12``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:25`` → ``<BuildDir>/kconfig/Kconfig.soc.defconfig:1`` → ``<Zephyr SoC>/riscv/riscv-privilege/Kconfig.defconfig:6`` → ``<Zephyr SoC>/riscv/riscv-privilege/andes_v5/Kconfig.defconfig.series:9``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_RISCV_ANDES_AE350 && SOC_SERIES_RISCV_ANDES_V5

----

At ``<Zephyr SoC>/riscv/riscv-privilege/telink_b91/Kconfig.defconfig.series:38``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:25`` → ``<BuildDir>/kconfig/Kconfig.soc.defconfig:1`` → ``<Zephyr SoC>/riscv/riscv-privilege/Kconfig.defconfig:6``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_SERIES_RISCV_TELINK_B91

----

At ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em4:30``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:27`` → ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:14``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_EMSDP_EM4 && SOC_ARC_EMSDP

----

At ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em5d:30``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:27`` → ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:15``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_EMSDP_EM5D && SOC_ARC_EMSDP

----

At ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em6:30``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:27`` → ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:16``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_EMSDP_EM6 && SOC_ARC_EMSDP

----

At ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em7d:30``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:27`` → ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:17``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_EMSDP_EM7D && SOC_ARC_EMSDP

----

At ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em9d:30``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:27`` → ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:19``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_EMSDP_EM9D && SOC_ARC_EMSDP

----

At ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em11d:30``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:27`` → ``<Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:20``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_EMSDP_EM11D && SOC_ARC_EMSDP

----

At ``<Zephyr SoC>/arc/snps_emsk/Kconfig.defconfig.em7d:43``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:27`` → ``<Zephyr SoC>/arc/snps_emsk/Kconfig.defconfig:10``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on ARC_MPU_VER = 2 && SOC_EMSK_EM7D && SOC_EMSK

----

At ``<Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig.em:41``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:27`` → ``<Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig:12``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on ARC_MPU_VER = 2 && SOC_NSIM_EM && SOC_NSIM

----

At ``<Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig.em7d_v22:38``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:27`` → ``<Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig:13``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on ARC_MPU_VER = 2 && SOC_NSIM_EM7D_V22 && SOC_NSIM

----

At ``<Zephyr SoC>/riscv/riscv-privilege/andes_v5/Kconfig.defconfig.ae350:12``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:27`` → ``<Zephyr SoC>/riscv/riscv-privilege/Kconfig.defconfig:6`` → ``<Zephyr SoC>/riscv/riscv-privilege/andes_v5/Kconfig.defconfig.series:9``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_RISCV_ANDES_AE350 && SOC_SERIES_RISCV_ANDES_V5

----

At ``<Zephyr SoC>/riscv/riscv-privilege/telink_b91/Kconfig.defconfig.series:38``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:27`` → ``<Zephyr SoC>/riscv/riscv-privilege/Kconfig.defconfig:6``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 2048
    	depends on SOC_SERIES_RISCV_TELINK_B91

----

At ``<Zephyr Architecture>/arc/Kconfig:364``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:39`` → ``<Zephyr Architecture>/Kconfig:12``

Menu path: (Top)

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 4096 if 64BIT

----

At ``<Zephyr Architecture>/arm64/core/Kconfig:54``

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

Menu path: (Top) → ARM64 Options

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 4096
    	depends on ARM64

----

At ``<Zephyr Architecture>/riscv/Kconfig:147``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:39`` → ``<Zephyr Architecture>/Kconfig:12``

Menu path: (Top) → RISCV Options

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 4096 if 64BIT
    	depends on RISCV

----

At ``<Zephyr Architecture>/sparc/Kconfig:37``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:39`` → ``<Zephyr Architecture>/Kconfig:12``

Menu path: (Top) → SPARC Options

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 4096 if COVERAGE_GCOV
    	default 2048
    	depends on SPARC

----

At ``<Zephyr Architecture>/x86/core/Kconfig.intel64:8``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:39`` → ``<Zephyr Architecture>/Kconfig:12`` → ``<Zephyr Architecture>/x86/Kconfig:483``

Menu path: (Top) → X86 Architecture Options

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int
    	default 8192
    	depends on X86_64 && X86

----

At ``<Zephyr Kernel>/Kconfig:139``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:40``

Menu path: (Top) → General Kernel Options

.. code-block:: kconfig

    config MAIN_STACK_SIZE
    	int "Size of stack for initialization and main thread"
    	default 2048 if COVERAGE_GCOV
    	default 1024 if TEST_ARM_CORTEX_M
    	default 512 if ZTEST && !(RISCV || X86)
    	default 1024
    	help
    	  When the initialization is complete, the thread executing it then
    	  executes the main() routine, so as to reuse the stack used by the
    	  initialization, which would be wasted RAM otherwise.
	  
    	  After initialization is complete, the thread runs main().

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