arch/Kconfig - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 # General architecture configuration options

 # Copyright (c) 2014-2015 Wind River Systems, Inc.
 # Copyright (c) 2015 Intel Corporation
 # Copyright (c) 2016 Cadence Design Systems, Inc.
 # SPDX-License-Identifier: Apache-2.0

 # Include these first so that any properties (e.g. defaults) below can be
 # overridden (by defining symbols in multiple locations)

 # Note: $ARCH might be a glob pattern
 source "$(ARCH_DIR)/$(ARCH)/Kconfig"

 choice ARCH_CHOICE
 	prompt "Architecture"
 	default X86

 config ARC
 	bool "ARC architecture"
 	select HAS_DTS

 config ARM
 	bool "ARM architecture"
 	select HAS_DTS

 config X86
 	bool "x86 architecture"
 	select ATOMIC_OPERATIONS_BUILTIN
 	select HAS_DTS

 config NIOS2
 	bool "Nios II Gen 2 architecture"
 	select ATOMIC_OPERATIONS_C
 	select HAS_DTS

 config RISCV
 	bool "RISCV architecture"
 	select HAS_DTS

 config XTENSA
 	bool "Xtensa architecture"
 	select HAS_DTS
 	select USE_SWITCH
 	select USE_SWITCH_SUPPORTED

 config ARCH_POSIX
 	bool "POSIX (native) architecture"
 	select ATOMIC_OPERATIONS_BUILTIN
 	select ARCH_HAS_CUSTOM_SWAP_TO_MAIN
 	select ARCH_HAS_CUSTOM_BUSY_WAIT
 	select ARCH_HAS_THREAD_ABORT
 	select NATIVE_APPLICATION
 	select HAS_COVERAGE_SUPPORT

 endchoice


 menu "General Architecture Options"

 module = ARCH
 module-str = arch
 source "subsys/logging/Kconfig.template.log_config"

 module = MPU
 module-str = mpu
 source "subsys/logging/Kconfig.template.log_config"

 config BIG_ENDIAN
 	bool
 	help
 	  This option tells the build system that the target system is big-endian.
 	  Little-endian architecture is the default and should leave this option
 	  unselected.  This option is selected by arch/$ARCH/Kconfig,
 	  soc/**/Kconfig, or boards/**/Kconfig and the user should generally avoid
 	  modifying it.  The option is used to select linker script OUTPUT_FORMAT
 	  and command line option for gen_isr_tables.py.

 config 64BIT
 	bool
 	help
 	  This option tells the build system that the target system is
 	  using a 64-bit address space, meaning that pointer and long types
 	  are 64 bits wide. This option is selected by arch/$ARCH/Kconfig,
 	  soc/**/Kconfig, or boards/**/Kconfig and the user should generally
 	  avoid modifying it.

 if ARC || ARM || NIOS2 || X86

 # Workaround for not being able to have commas in macro arguments
 DT_CHOSEN_Z_SRAM := zephyr,sram

 config SRAM_SIZE
 	int "SRAM Size in kB"
 	default $(dt_chosen_reg_size_int,$(DT_CHOSEN_Z_SRAM),0,K)
 	help
 	  This option specifies the size of the SRAM in kB.  It is normally set by
 	  the board's defconfig file and the user should generally avoid modifying
 	  it via the menu configuration.

 config SRAM_BASE_ADDRESS
 	hex "SRAM Base Address"
 	default $(dt_chosen_reg_addr_hex,$(DT_CHOSEN_Z_SRAM))
 	help
 	  This option specifies the base address of the SRAM on the board.  It is
 	  normally set by the board's defconfig file and the user should generally
 	  avoid modifying it via the menu configuration.

 # Workaround for not being able to have commas in macro arguments
 DT_CHOSEN_Z_FLASH := zephyr,flash

 config FLASH_SIZE
 	int "Flash Size in kB"
 	default $(dt_chosen_reg_size_int,$(DT_CHOSEN_Z_FLASH),0,K) if (XIP && ARM) || !ARM
 	help
 	  This option specifies the size of the flash in kB.  It is normally set by
 	  the board's defconfig file and the user should generally avoid modifying
 	  it via the menu configuration.

 config FLASH_BASE_ADDRESS
 	hex "Flash Base Address"
 	default $(dt_chosen_reg_addr_hex,$(DT_CHOSEN_Z_FLASH)) if (XIP && ARM) || !ARM
 	help
 	  This option specifies the base address of the flash on the board. It is
 	  normally set by the board's defconfig file and the user should generally
 	  avoid modifying it via the menu configuration.

 endif # ARM || ARC || NIOS2 || X86

 if ARCH_HAS_TRUSTED_EXECUTION

 config TRUSTED_EXECUTION_SECURE
 	bool "Trusted Execution: Secure firmware image"
 	help
 	  Select this option to enable building a Secure firmware
 	  image for a platform that supports Trusted Execution. A
 	  Secure firmware image will execute in Secure state. It may
 	  allow the CPU to execute in Non-Secure (Normal) state.
 	  Therefore, a Secure firmware image shall be able to
 	  configure security attributions of CPU resources (memory
 	  areas, peripherals, interrupts, etc.) as well as to handle
 	  faults, related to security violations. It may optionally
 	  allow certain functions to be called from the Non-Secure
 	  (Normal) domain.

 config TRUSTED_EXECUTION_NONSECURE
 	depends on !TRUSTED_EXECUTION_SECURE
 	bool "Trusted Execution: Non-Secure firmware image"
 	help
 	  Select this option to enable building a Non-Secure
 	  firmware image for a platform that supports Trusted
 	  Execution. A Non-Secure firmware image will execute
 	  in Non-Secure (Normal) state. Therefore, it shall not
 	  access CPU resources (memory areas, peripherals,
 	  interrupts etc.) belonging to the Secure domain.

 endif # ARCH_HAS_TRUSTED_EXECUTION

 config HW_STACK_PROTECTION
 	bool "Hardware Stack Protection"
 	depends on ARCH_HAS_STACK_PROTECTION
 	help
 	  Select this option to enable hardware-based platform features to
 	  catch stack overflows when the system is running in privileged
 	  mode. If CONFIG_USERSPACE is not enabled, the system is always
 	  running in privileged mode.

 	  Note that this does not necessarily prevent corruption and assertions
 	  about the overall system state when a fault is triggered cannot be
 	  made.

 config USERSPACE
 	bool "User mode threads"
 	depends on ARCH_HAS_USERSPACE
 	help
 	  When enabled, threads may be created or dropped down to user mode,
 	  which has significantly restricted permissions and must interact
 	  with the kernel via system calls. See Zephyr documentation for more
 	  details	about this feature.

 	  If a user thread overflows its stack, this will be caught and the
 	  kernel itself will be shielded from harm. Enabling this option
 	  may or may not catch stack overflows when the system is in
 	  privileged mode or handling a system call; to ensure these are always
 	  caught, enable CONFIG_HW_STACK_PROTECTION.

 config PRIVILEGED_STACK_SIZE
 	int "Size of privileged stack"
 	default 1024
 	depends on ARCH_HAS_USERSPACE
 	help
 	  This option sets the privileged stack region size that will be used
 	  in addition to the user mode thread stack.  During normal execution,
 	  this region will be inaccessible from user mode.  During system calls,
 	  this region will be utilized by the system call.

 config PRIVILEGED_STACK_TEXT_AREA
 	int "Privileged stacks text area"
 	default 512 if COVERAGE_GCOV
 	default 256
 	depends on ARCH_HAS_USERSPACE
 	help
 	  Stack text area size for privileged stacks.

 config KOBJECT_TEXT_AREA
 	int "Size if kobject text area"
 	default 512 if COVERAGE_GCOV
 	default 512 if NO_OPTIMIZATIONS
 	default 256
 	depends on ARCH_HAS_USERSPACE
 	help
 	  Size of kernel object text area. Used in linker script.

 config STACK_GROWS_UP
 	bool "Stack grows towards higher memory addresses"
 	help
 	  Select this option if the architecture has upward growing thread
 	  stacks. This is not common.

 config MAX_THREAD_BYTES
 	int "Bytes to use when tracking object thread permissions"
 	default 2
 	depends on USERSPACE
 	help
 	  Every kernel object will have an associated bitfield to store
 	  thread permissions for that object. This controls the size of the
 	  bitfield (in bytes) and imposes a limit on how many threads can
 	  be created in the system.

 config DYNAMIC_OBJECTS
 	bool "Allow kernel objects to be allocated at runtime"
 	depends on USERSPACE
 	help
 	  Enabling this option allows for kernel objects to be requested from
 	  the calling thread's resource pool, at a slight cost in performance
 	  due to the supplemental run-time tables required to validate such
 	  objects.

 	  Objects allocated in this way can be freed with a supervisor-only
 	  API call, or when the number of references to that object drops to
 	  zero.

 if ARCH_HAS_NOCACHE_MEMORY_SUPPORT

 config NOCACHE_MEMORY
 	bool "Support for uncached memory"
 	help
 	  Add a "nocache" read-write memory section that is configured to
 	  not be cached. This memory section can be used to perform DMA
 	  transfers when cache coherence issues are not optimal or can not
 	  be solved using cache maintenance operations.

 endif # ARCH_HAS_NOCACHE_MEMORY_SUPPORT

 menu "Interrupt Configuration"
 #
 # Interrupt related configs
 #
 config DYNAMIC_INTERRUPTS
 	bool "Enable installation of IRQs at runtime"
 	help
 	  Enable installation of interrupts at runtime, which will move some
 	  interrupt-related data structures to RAM instead of ROM, and
 	  on some architectures increase code size.

 config GEN_ISR_TABLES
 	bool "Use generated IRQ tables"
 	help
 	  This option controls whether a platform uses the gen_isr_tables
 	  script to generate its interrupt tables. This mechanism will create
 	  an appropriate hardware vector table and/or software IRQ table.

 config GEN_IRQ_VECTOR_TABLE
 	bool "Generate an interrupt vector table"
 	default y
 	depends on GEN_ISR_TABLES
 	help
 	  This option controls whether a platform using gen_isr_tables
 	  needs an interrupt vector table created. Only disable this if the
 	  platform does not use a vector table at all, or requires the vector
 	  table to be in a format that is not an array of function pointers
 	  indexed by IRQ line. In the latter case, the vector table must be
 	  supplied by the application or architecture code.

 config GEN_SW_ISR_TABLE
 	bool "Generate a software ISR table"
 	default y
 	depends on GEN_ISR_TABLES
 	help
 	  This option controls whether a platform using gen_isr_tables
 	  needs a software ISR table table created. This is an array of struct
 	  _isr_table_entry containing the interrupt service routine and supplied
 	  parameter.

 config ARCH_SW_ISR_TABLE_ALIGN
 	int "Alignment size of a software ISR table"
 	default 0
 	depends on GEN_SW_ISR_TABLE
 	help
 	  This option controls alignment size of generated
 	  _sw_isr_table.  Some architecture needs a software ISR table
 	  to be aligned to architecture specific size.  The default
 	  size is 0 for no alignment.

 config GEN_IRQ_START_VECTOR
 	int
 	default 0
 	depends on GEN_ISR_TABLES
 	help
 	  On some architectures, part of the vector table may be reserved for
 	  system exceptions and is declared separately from the tables
 	  created by gen_isr_tables.py. When creating these tables, this value
 	  will be subtracted from CONFIG_NUM_IRQS to properly size them.
 	  This is a hidden option which needs to be set per architecture and
 	  left alone.


 config IRQ_OFFLOAD
 	bool "Enable IRQ offload"
 	help
 	  Enable irq_offload() API which allows functions to be synchronously
 	  run in interrupt context. Mainly useful for test cases.

 endmenu # Interrupt configuration

 endmenu

 #
 # Architecture Capabilities
 #
 config ARCH_HAS_TRUSTED_EXECUTION
 	bool

 config ARCH_HAS_STACK_PROTECTION
 	bool

 config ARCH_HAS_USERSPACE
 	bool

 config ARCH_HAS_EXECUTABLE_PAGE_BIT
 	bool

 config ARCH_HAS_NOCACHE_MEMORY_SUPPORT
 	bool

 config ARCH_HAS_RAMFUNC_SUPPORT
 	bool

 config ARCH_HAS_NESTED_EXCEPTION_DETECTION
 	bool

 #
 # Other architecture related options
 #

 config ARCH_HAS_THREAD_ABORT
 	bool

 #
 # Hidden PM feature configs which are to be selected by
 # individual SoC.
 #
 config HAS_SYS_POWER_STATE_SLEEP_1
 	# Hidden
 	bool
 	help
 	  This option signifies that the target supports the SYS_POWER_STATE_SLEEP_1
 	  configuration option.

 config HAS_SYS_POWER_STATE_SLEEP_2
 	# Hidden
 	bool
 	help
 	  This option signifies that the target supports the SYS_POWER_STATE_SLEEP_2
 	  configuration option.

 config HAS_SYS_POWER_STATE_SLEEP_3
 	# Hidden
 	bool
 	help
 	  This option signifies that the target supports the SYS_POWER_STATE_SLEEP_3
 	  configuration option.

 config HAS_SYS_POWER_STATE_DEEP_SLEEP_1
 	# Hidden
 	bool
 	help
 	  This option signifies that the target supports the SYS_POWER_STATE_DEEP_SLEEP_1
 	  configuration option.

 config HAS_SYS_POWER_STATE_DEEP_SLEEP_2
 	# Hidden
 	bool
 	help
 	  This option signifies that the target supports the SYS_POWER_STATE_DEEP_SLEEP_2
 	  configuration option.

 config HAS_SYS_POWER_STATE_DEEP_SLEEP_3
 	# Hidden
 	bool
 	help
 	  This option signifies that the target supports the SYS_POWER_STATE_DEEP_SLEEP_3
 	  configuration option.

 config BOOTLOADER_CONTEXT_RESTORE_SUPPORTED
 	# Hidden
 	bool
 	help
 	  This option signifies that the target has options of bootloaders
 	  that support context restore upon resume from deep sleep


 # End hidden CPU family configs
 #

 config CPU_HAS_TEE
 	bool
 	help
 	  This option is enabled when the CPU has support for Trusted
 	  Execution Environment (e.g. when it has a security attribution
 	  unit).

 config CPU_HAS_FPU
 	bool
 	help
 	  This option is enabled when the CPU has hardware floating point
 	  unit.

 config CPU_HAS_MPU
 	bool
 	help
 	  This option is enabled when the CPU has a Memory Protection Unit (MPU).

 config MEMORY_PROTECTION
 	bool
 	help
 	  This option is enabled when Memory Protection features are supported.
 	  Memory protection support is currently available on ARC, ARM, and x86
 	  architectures.

 config MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT
 	bool
 	help
 	  This option is enabled when the MPU requires a power of two alignment
 	  and size for MPU regions.

 config MPU_REQUIRES_NON_OVERLAPPING_REGIONS
 	bool
 	help
 	  This option is enabled when the MPU requires the active (i.e. enabled)
 	  MPU regions to be non-overlapping with each other.

 menuconfig FLOAT
 	bool "Floating point"
 	depends on CPU_HAS_FPU
 	depends on ARM || X86 || ARC
 	help
 	  This option allows threads to use the floating point registers.
 	  By default, only a single thread may use the registers.

 	  Disabling this option means that any thread that uses a
 	  floating point register will get a fatal exception.

 if FLOAT

 config FP_SHARING
 	bool "Floating point register sharing"
 	help
 	  This option allows multiple threads to use the floating point
 	  registers.

 endif # FLOAT

 #
 # End hidden PM feature configs
 #

 config ARCH
 	string
 	help
 	  System architecture string.

 config SOC
 	string
 	help
 	  SoC name which can be found under soc/<arch>/<soc name>.
 	  This option holds the directory name used by the build system to locate
 	  the correct linker and header files for the SoC.

 config SOC_SERIES
 	string
 	help
 	  SoC series name which can be found under soc/<arch>/<family>/<series>.
 	  This option holds the directory name used by the build system to locate
 	  the correct linker and header files.

 config SOC_FAMILY
 	string
 	help
 	  SoC family name which can be found under soc/<arch>/<family>.
 	  This option holds the directory name used by the build system to locate
 	  the correct linker and header files.

 config BOARD
 	string
 	help
 	  This option holds the name of the board and is used to locate the files
 	  related to the board in the source tree (under boards/).
 	  The Board is the first location where we search for a linker.ld file,
 	  if not found we look for the linker file in
 	  soc/<arch>/<family>/<series>
	# General architecture configuration options

	# Copyright (c) 2014-2015 Wind River Systems, Inc.
	# Copyright (c) 2015 Intel Corporation
	# Copyright (c) 2016 Cadence Design Systems, Inc.
	# SPDX-License-Identifier: Apache-2.0

	# Include these first so that any properties (e.g. defaults) below can be
	# overridden (by defining symbols in multiple locations)

	# Note: $ARCH might be a glob pattern
	source "$(ARCH_DIR)/$(ARCH)/Kconfig"

	choice ARCH_CHOICE
	prompt "Architecture"
	default X86

	config ARC
	bool "ARC architecture"
	select HAS_DTS

	config ARM
	bool "ARM architecture"
	select HAS_DTS

	config X86
	bool "x86 architecture"
	select ATOMIC_OPERATIONS_BUILTIN
	select HAS_DTS

	config NIOS2
	bool "Nios II Gen 2 architecture"
	select ATOMIC_OPERATIONS_C
	select HAS_DTS

	config RISCV
	bool "RISCV architecture"
	select HAS_DTS

	config XTENSA
	bool "Xtensa architecture"
	select HAS_DTS
	select USE_SWITCH
	select USE_SWITCH_SUPPORTED

	config ARCH_POSIX
	bool "POSIX (native) architecture"
	select ATOMIC_OPERATIONS_BUILTIN
	select ARCH_HAS_CUSTOM_SWAP_TO_MAIN
	select ARCH_HAS_CUSTOM_BUSY_WAIT
	select ARCH_HAS_THREAD_ABORT
	select NATIVE_APPLICATION
	select HAS_COVERAGE_SUPPORT

	endchoice


	menu "General Architecture Options"

	module = ARCH
	module-str = arch
	source "subsys/logging/Kconfig.template.log_config"

	module = MPU
	module-str = mpu
	source "subsys/logging/Kconfig.template.log_config"

	config BIG_ENDIAN
	bool
	help
	This option tells the build system that the target system is big-endian.
	Little-endian architecture is the default and should leave this option
	unselected. This option is selected by arch/$ARCH/Kconfig,
	soc//Kconfig, or boards//Kconfig and the user should generally avoid
	modifying it. The option is used to select linker script OUTPUT_FORMAT
	and command line option for gen_isr_tables.py.

	config 64BIT
	bool
	help
	This option tells the build system that the target system is
	using a 64-bit address space, meaning that pointer and long types
	are 64 bits wide. This option is selected by arch/$ARCH/Kconfig,
	soc//Kconfig, or boards//Kconfig and the user should generally
	avoid modifying it.

	if ARC \|\| ARM \|\| NIOS2 \|\| X86

	# Workaround for not being able to have commas in macro arguments
	DT_CHOSEN_Z_SRAM := zephyr,sram

	config SRAM_SIZE
	int "SRAM Size in kB"
	default $(dt_chosen_reg_size_int,$(DT_CHOSEN_Z_SRAM),0,K)
	help
	This option specifies the size of the SRAM in kB. It is normally set by
	the board's defconfig file and the user should generally avoid modifying
	it via the menu configuration.

	config SRAM_BASE_ADDRESS
	hex "SRAM Base Address"
	default $(dt_chosen_reg_addr_hex,$(DT_CHOSEN_Z_SRAM))
	help
	This option specifies the base address of the SRAM on the board. It is
	normally set by the board's defconfig file and the user should generally
	avoid modifying it via the menu configuration.

	# Workaround for not being able to have commas in macro arguments
	DT_CHOSEN_Z_FLASH := zephyr,flash

	config FLASH_SIZE
	int "Flash Size in kB"
	default $(dt_chosen_reg_size_int,$(DT_CHOSEN_Z_FLASH),0,K) if (XIP && ARM) \|\| !ARM
	help
	This option specifies the size of the flash in kB. It is normally set by
	the board's defconfig file and the user should generally avoid modifying
	it via the menu configuration.

	config FLASH_BASE_ADDRESS
	hex "Flash Base Address"
	default $(dt_chosen_reg_addr_hex,$(DT_CHOSEN_Z_FLASH)) if (XIP && ARM) \|\| !ARM
	help
	This option specifies the base address of the flash on the board. It is
	normally set by the board's defconfig file and the user should generally
	avoid modifying it via the menu configuration.

	endif # ARM \|\| ARC \|\| NIOS2 \|\| X86

	if ARCH_HAS_TRUSTED_EXECUTION

	config TRUSTED_EXECUTION_SECURE
	bool "Trusted Execution: Secure firmware image"
	help
	Select this option to enable building a Secure firmware
	image for a platform that supports Trusted Execution. A
	Secure firmware image will execute in Secure state. It may
	allow the CPU to execute in Non-Secure (Normal) state.
	Therefore, a Secure firmware image shall be able to
	configure security attributions of CPU resources (memory
	areas, peripherals, interrupts, etc.) as well as to handle
	faults, related to security violations. It may optionally
	allow certain functions to be called from the Non-Secure
	(Normal) domain.

	config TRUSTED_EXECUTION_NONSECURE
	depends on !TRUSTED_EXECUTION_SECURE
	bool "Trusted Execution: Non-Secure firmware image"
	help
	Select this option to enable building a Non-Secure
	firmware image for a platform that supports Trusted
	Execution. A Non-Secure firmware image will execute
	in Non-Secure (Normal) state. Therefore, it shall not
	access CPU resources (memory areas, peripherals,
	interrupts etc.) belonging to the Secure domain.

	endif # ARCH_HAS_TRUSTED_EXECUTION

	config HW_STACK_PROTECTION
	bool "Hardware Stack Protection"
	depends on ARCH_HAS_STACK_PROTECTION
	help
	Select this option to enable hardware-based platform features to
	catch stack overflows when the system is running in privileged
	mode. If CONFIG_USERSPACE is not enabled, the system is always
	running in privileged mode.

	Note that this does not necessarily prevent corruption and assertions
	about the overall system state when a fault is triggered cannot be
	made.

	config USERSPACE
	bool "User mode threads"
	depends on ARCH_HAS_USERSPACE
	help
	When enabled, threads may be created or dropped down to user mode,
	which has significantly restricted permissions and must interact
	with the kernel via system calls. See Zephyr documentation for more
	details about this feature.

	If a user thread overflows its stack, this will be caught and the
	kernel itself will be shielded from harm. Enabling this option
	may or may not catch stack overflows when the system is in
	privileged mode or handling a system call; to ensure these are always
	caught, enable CONFIG_HW_STACK_PROTECTION.

	config PRIVILEGED_STACK_SIZE
	int "Size of privileged stack"
	default 1024
	depends on ARCH_HAS_USERSPACE
	help
	This option sets the privileged stack region size that will be used
	in addition to the user mode thread stack. During normal execution,
	this region will be inaccessible from user mode. During system calls,
	this region will be utilized by the system call.

	config PRIVILEGED_STACK_TEXT_AREA
	int "Privileged stacks text area"
	default 512 if COVERAGE_GCOV
	default 256
	depends on ARCH_HAS_USERSPACE
	help
	Stack text area size for privileged stacks.

	config KOBJECT_TEXT_AREA
	int "Size if kobject text area"
	default 512 if COVERAGE_GCOV
	default 512 if NO_OPTIMIZATIONS
	default 256
	depends on ARCH_HAS_USERSPACE
	help
	Size of kernel object text area. Used in linker script.

	config STACK_GROWS_UP
	bool "Stack grows towards higher memory addresses"
	help
	Select this option if the architecture has upward growing thread
	stacks. This is not common.

	config MAX_THREAD_BYTES
	int "Bytes to use when tracking object thread permissions"
	default 2
	depends on USERSPACE
	help
	Every kernel object will have an associated bitfield to store
	thread permissions for that object. This controls the size of the
	bitfield (in bytes) and imposes a limit on how many threads can
	be created in the system.

	config DYNAMIC_OBJECTS
	bool "Allow kernel objects to be allocated at runtime"
	depends on USERSPACE
	help
	Enabling this option allows for kernel objects to be requested from
	the calling thread's resource pool, at a slight cost in performance
	due to the supplemental run-time tables required to validate such
	objects.

	Objects allocated in this way can be freed with a supervisor-only
	API call, or when the number of references to that object drops to
	zero.

	if ARCH_HAS_NOCACHE_MEMORY_SUPPORT

	config NOCACHE_MEMORY
	bool "Support for uncached memory"
	help
	Add a "nocache" read-write memory section that is configured to
	not be cached. This memory section can be used to perform DMA
	transfers when cache coherence issues are not optimal or can not
	be solved using cache maintenance operations.

	endif # ARCH_HAS_NOCACHE_MEMORY_SUPPORT

	menu "Interrupt Configuration"
	#
	# Interrupt related configs
	#
	config DYNAMIC_INTERRUPTS
	bool "Enable installation of IRQs at runtime"
	help
	Enable installation of interrupts at runtime, which will move some
	interrupt-related data structures to RAM instead of ROM, and
	on some architectures increase code size.

	config GEN_ISR_TABLES
	bool "Use generated IRQ tables"
	help
	This option controls whether a platform uses the gen_isr_tables
	script to generate its interrupt tables. This mechanism will create
	an appropriate hardware vector table and/or software IRQ table.

	config GEN_IRQ_VECTOR_TABLE
	bool "Generate an interrupt vector table"
	default y
	depends on GEN_ISR_TABLES
	help
	This option controls whether a platform using gen_isr_tables
	needs an interrupt vector table created. Only disable this if the
	platform does not use a vector table at all, or requires the vector
	table to be in a format that is not an array of function pointers
	indexed by IRQ line. In the latter case, the vector table must be
	supplied by the application or architecture code.

	config GEN_SW_ISR_TABLE
	bool "Generate a software ISR table"
	default y
	depends on GEN_ISR_TABLES
	help
	This option controls whether a platform using gen_isr_tables
	needs a software ISR table table created. This is an array of struct
	_isr_table_entry containing the interrupt service routine and supplied
	parameter.

	config ARCH_SW_ISR_TABLE_ALIGN
	int "Alignment size of a software ISR table"
	default 0
	depends on GEN_SW_ISR_TABLE
	help
	This option controls alignment size of generated
	_sw_isr_table. Some architecture needs a software ISR table
	to be aligned to architecture specific size. The default
	size is 0 for no alignment.

	config GEN_IRQ_START_VECTOR
	int
	default 0
	depends on GEN_ISR_TABLES
	help
	On some architectures, part of the vector table may be reserved for
	system exceptions and is declared separately from the tables
	created by gen_isr_tables.py. When creating these tables, this value
	will be subtracted from CONFIG_NUM_IRQS to properly size them.
	This is a hidden option which needs to be set per architecture and
	left alone.


	config IRQ_OFFLOAD
	bool "Enable IRQ offload"
	help
	Enable irq_offload() API which allows functions to be synchronously
	run in interrupt context. Mainly useful for test cases.

	endmenu # Interrupt configuration

	endmenu

	#
	# Architecture Capabilities
	#
	config ARCH_HAS_TRUSTED_EXECUTION
	bool

	config ARCH_HAS_STACK_PROTECTION
	bool

	config ARCH_HAS_USERSPACE
	bool

	config ARCH_HAS_EXECUTABLE_PAGE_BIT
	bool

	config ARCH_HAS_NOCACHE_MEMORY_SUPPORT
	bool

	config ARCH_HAS_RAMFUNC_SUPPORT
	bool

	config ARCH_HAS_NESTED_EXCEPTION_DETECTION
	bool

	#
	# Other architecture related options
	#

	config ARCH_HAS_THREAD_ABORT
	bool

	#
	# Hidden PM feature configs which are to be selected by
	# individual SoC.
	#
	config HAS_SYS_POWER_STATE_SLEEP_1
	# Hidden
	bool
	help
	This option signifies that the target supports the SYS_POWER_STATE_SLEEP_1
	configuration option.

	config HAS_SYS_POWER_STATE_SLEEP_2
	# Hidden
	bool
	help
	This option signifies that the target supports the SYS_POWER_STATE_SLEEP_2
	configuration option.

	config HAS_SYS_POWER_STATE_SLEEP_3
	# Hidden
	bool
	help
	This option signifies that the target supports the SYS_POWER_STATE_SLEEP_3
	configuration option.

	config HAS_SYS_POWER_STATE_DEEP_SLEEP_1
	# Hidden
	bool
	help
	This option signifies that the target supports the SYS_POWER_STATE_DEEP_SLEEP_1
	configuration option.

	config HAS_SYS_POWER_STATE_DEEP_SLEEP_2
	# Hidden
	bool
	help
	This option signifies that the target supports the SYS_POWER_STATE_DEEP_SLEEP_2
	configuration option.

	config HAS_SYS_POWER_STATE_DEEP_SLEEP_3
	# Hidden
	bool
	help
	This option signifies that the target supports the SYS_POWER_STATE_DEEP_SLEEP_3
	configuration option.

	config BOOTLOADER_CONTEXT_RESTORE_SUPPORTED
	# Hidden
	bool
	help
	This option signifies that the target has options of bootloaders
	that support context restore upon resume from deep sleep


	# End hidden CPU family configs
	#

	config CPU_HAS_TEE
	bool
	help
	This option is enabled when the CPU has support for Trusted
	Execution Environment (e.g. when it has a security attribution
	unit).

	config CPU_HAS_FPU
	bool
	help
	This option is enabled when the CPU has hardware floating point
	unit.

	config CPU_HAS_MPU
	bool
	help
	This option is enabled when the CPU has a Memory Protection Unit (MPU).

	config MEMORY_PROTECTION
	bool
	help
	This option is enabled when Memory Protection features are supported.
	Memory protection support is currently available on ARC, ARM, and x86
	architectures.

	config MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT
	bool
	help
	This option is enabled when the MPU requires a power of two alignment
	and size for MPU regions.

	config MPU_REQUIRES_NON_OVERLAPPING_REGIONS
	bool
	help
	This option is enabled when the MPU requires the active (i.e. enabled)
	MPU regions to be non-overlapping with each other.

	menuconfig FLOAT
	bool "Floating point"
	depends on CPU_HAS_FPU
	depends on ARM \|\| X86 \|\| ARC
	help
	This option allows threads to use the floating point registers.
	By default, only a single thread may use the registers.

	Disabling this option means that any thread that uses a
	floating point register will get a fatal exception.

	if FLOAT

	config FP_SHARING
	bool "Floating point register sharing"
	help
	This option allows multiple threads to use the floating point
	registers.

	endif # FLOAT

	#
	# End hidden PM feature configs
	#

	config ARCH
	string
	help
	System architecture string.

	config SOC
	string
	help
	SoC name which can be found under soc/<arch>/<soc name>.
	This option holds the directory name used by the build system to locate
	the correct linker and header files for the SoC.

	config SOC_SERIES
	string
	help
	SoC series name which can be found under soc/<arch>/<family>/<series>.
	This option holds the directory name used by the build system to locate
	the correct linker and header files.

	config SOC_FAMILY
	string
	help
	SoC family name which can be found under soc/<arch>/<family>.
	This option holds the directory name used by the build system to locate
	the correct linker and header files.

	config BOARD
	string
	help
	This option holds the name of the board and is used to locate the files
	related to the board in the source tree (under boards/).
	The Board is the first location where we search for a linker.ld file,
	if not found we look for the linker file in
	soc/<arch>/<family>/<series>