src/Kconfig

## SPDX-License-Identifier: GPL-2.0-only

mainmenu "coreboot configuration"

menu "General setup"

config COREBOOT_BUILD
	bool
	default y

config LOCALVERSION
	string "Local version string"
	help
	  Append an extra string to the end of the coreboot version.

	  This can be useful if, for instance, you want to append the
	  respective board's hostname or some other identifying string to
	  the coreboot version number, so that you can easily distinguish
	  boot logs of different boards from each other.

config CONFIGURABLE_CBFS_PREFIX
	bool
	help
	  Select this to prompt to use to configure the prefix for cbfs files.

choice
	prompt "CBFS prefix to use"
	depends on CONFIGURABLE_CBFS_PREFIX
	default CBFS_PREFIX_FALLBACK

config CBFS_PREFIX_FALLBACK
	bool "fallback"

config CBFS_PREFIX_NORMAL
	bool "normal"

config CBFS_PREFIX_DIY
	bool "Define your own cbfs prefix"

endchoice

config CBFS_PREFIX
	string "CBFS prefix to use" if CBFS_PREFIX_DIY
	default "fallback" if !CONFIGURABLE_CBFS_PREFIX || CBFS_PREFIX_FALLBACK
	default "normal" if CBFS_PREFIX_NORMAL
	help
	  Select the prefix to all files put into the image. It's "fallback"
	  by default, "normal" is a common alternative.

config DEFAULT_COMPILER_LLVM_CLANG
	bool
	help
	  Allows to override the default compiler. This can for instance be
	  set in site-local/Kconfig.

choice
	prompt "Compiler to use"
	default COMPILER_LLVM_CLANG if DEFAULT_COMPILER_LLVM_CLANG
	default COMPILER_GCC
	help
	  This option allows you to select the compiler used for building
	  coreboot.
	  You must build the coreboot crosscompiler for the board that you
	  have selected.

	  To build all the GCC crosscompilers (takes a LONG time), run:
	    make crossgcc

	  For help on individual architectures, run the command:
	    make help_toolchain

config COMPILER_GCC
	bool "GCC"
	help
	  Use the GNU Compiler Collection (GCC) to build coreboot.

	  For details see http://gcc.gnu.org.

config COMPILER_LLVM_CLANG
	bool "LLVM/clang"
	depends on ALLOW_EXPERIMENTAL_CLANG || ARCH_SUPPORTS_CLANG
	help
	  Use LLVM/clang to build coreboot.  To use this, you must build the
	  coreboot version of the clang compiler.  Run the command
	    make clang
	  Note that Clang is not currently working on all architectures.

	  For details see http://clang.llvm.org.

endchoice

config ARCH_SUPPORTS_CLANG
	bool
	help
	  Opt-in flag for architectures that generally work well with CLANG.
	  By default the option would be hidden.

config ALLOW_EXPERIMENTAL_CLANG
	bool "Allow experimental LLVM/Clang"
	depends on !ARCH_SUPPORTS_CLANG
	help
	  On some architectures CLANG does not work that well.
	  Use this only to try to get CLANG working.

config ANY_TOOLCHAIN
	bool "Allow building with any toolchain"
	default n
	help
	  Many toolchains break when building coreboot since it uses quite
	  unusual linker features. Unless developers explicitly request it,
	  we'll have to assume that they use their distro compiler by mistake.
	  Make sure that using patched compilers is a conscious decision.

config CCACHE
	bool "Use ccache to speed up (re)compilation"
	default n
	help
	  Enables the use of ccache for faster builds.

	  Requires the ccache utility in your system $PATH.

	  For details see https://ccache.samba.org.

config IWYU
	bool "Test platform with include-what-you-use"
	help
	  This runs each source file through the include-what-you-use tool
	  to check the header includes.

config FMD_GENPARSER
	bool "Generate flashmap descriptor parser using flex and bison"
	default n
	help
	  Enable this option if you are working on the flashmap descriptor
	  parser and made changes to fmd_scanner.l or fmd_parser.y.

	  Otherwise, say N to use the provided pregenerated scanner/parser.

config UTIL_GENPARSER
	bool "Generate parsers for bincfg, sconfig and kconfig locally"
	default n
	help
	  Enable this option if you are working on the sconfig device tree
	  parser or bincfg and made changes to the .l or .y files.

	  Otherwise, say N to use the provided pregenerated scanner/parser.

choice
	prompt "Option backend to use"
	default USE_MAINBOARD_SPECIFIC_OPTION_BACKEND if HAVE_MAINBOARD_SPECIFIC_OPTION_BACKEND
	default USE_OPTION_TABLE if NVRAMCUI_SECONDARY_PAYLOAD
	default USE_UEFI_VARIABLE_STORE if DRIVERS_EFI_VARIABLE_STORE && \
		PAYLOAD_EDK2 && SMMSTORE_V2

config OPTION_BACKEND_NONE
	bool "None"

config USE_OPTION_TABLE
	bool "Use CMOS for configuration values"
	depends on HAVE_OPTION_TABLE
	help
	  Enable this option if coreboot shall read options from the "CMOS"
	  NVRAM instead of using hard-coded values.

config USE_UEFI_VARIABLE_STORE
	bool "Use UEFI variable-store in SPI flash as option backend"
	depends on DRIVERS_EFI_VARIABLE_STORE
	depends on SMMSTORE_V2
	help
	  Enable this option if coreboot shall read/write options from the
	  SMMSTORE region within the SPI flash. The region must be formatted
	  by the payload first before it can be used.

config USE_MAINBOARD_SPECIFIC_OPTION_BACKEND
	bool "Use mainboard-specific option backend"
	depends on HAVE_MAINBOARD_SPECIFIC_OPTION_BACKEND
	help
	  Use a mainboard-specific mechanism to access runtime-configurable
	  options.

endchoice

config STATIC_OPTION_TABLE
	bool "Load default configuration values into CMOS on each boot"
	depends on USE_OPTION_TABLE
	help
	  Enable this option to reset "CMOS" NVRAM values to default on
	  every boot.  Use this if you want the NVRAM configuration to
	  never be modified from its default values.

config MB_COMPRESS_RAMSTAGE_LZ4
	bool
	help
	  Select this in a mainboard to use LZ4 compression by default

choice
	prompt "Ramstage compression"
	depends on HAVE_RAMSTAGE && !UNCOMPRESSED_RAMSTAGE
	default COMPRESS_RAMSTAGE_LZ4 if MB_COMPRESS_RAMSTAGE_LZ4
	default COMPRESS_RAMSTAGE_LZMA

config COMPRESS_RAMSTAGE_LZMA
	bool "Compress ramstage with LZMA"
	help
	  Compress ramstage with LZMA to save memory in the flash image.

config COMPRESS_RAMSTAGE_LZ4
	bool "Compress ramstage with LZ4"
	help
	  LZ4 doesn't give as good compression as LZMA, but decompresses much
	  faster. For large binaries such as ramstage, it's typically best to
	  use LZMA, but there can be cases where the faster decompression of
	  LZ4 can lead to a faster boot time. Testing on each individual board
	  is typically going to be needed due to the large number of factors
	  that can influence the decision. Binary size, CPU speed, ROM read
	  speed, cache, and other factors all play a part.

	  If you're not sure, stick with LZMA.

endchoice

config COMPRESS_PRERAM_STAGES
	bool "Compress romstage and verstage with LZ4"
	depends on (HAVE_ROMSTAGE || HAVE_VERSTAGE) && NO_XIP_EARLY_STAGES
	# Default value set at the end of the file
	help
	  Compress romstage and (if it exists) verstage with LZ4 to save flash
	  space and speed up boot, since the time for reading the image from SPI
	  (and in the vboot case verifying it) is usually much greater than the
	  time spent decompressing. Doesn't work for XIP stages for obvious
	  reasons.

config COMPRESS_BOOTBLOCK
	bool
	depends on HAVE_BOOTBLOCK
	help
	  This option can be used to compress the bootblock with LZ4 and attach
	  a small self-decompression stub to its front. This can drastically
	  reduce boot time on platforms where the bootblock is loaded over a
	  very slow connection and bootblock size trumps all other factors for
	  speed. Since using this option usually requires changes to the
	  SoC memlayout and possibly extra support code, it should not be
	  user-selectable. (There's no real point in offering this to the user
	  anyway... if it works and saves boot time, you would always want it.)

config SEPARATE_ROMSTAGE
	bool "Build a separate romstage"
	help
	  Build a separate romstage that is loaded by bootblock. With this
	  option disabled the romstage sources are linked inside the bootblock
	  as a single stage.

config INCLUDE_CONFIG_FILE
	bool "Include the coreboot .config file into the ROM image"
	# Default value set at the end of the file
	help
	  Include the .config file that was used to compile coreboot
	  in the (CBFS) ROM image. This is useful if you want to know which
	  options were used to build a specific coreboot.rom image.

	  Saying Y here will increase the image size by 2-3KB.

	  You can then use cbfstool to extract the config from a final image:

	    cbfstool coreboot.rom extract -n config -f <output file path>

	  Alternatively, you can also use cbfstool to print the image
	  contents (including the raw 'config' item we're looking for).

	  Example:

	    $ cbfstool coreboot.rom print
	    coreboot.rom: 4096 kB, bootblocksize 1008, romsize 4194304,
	                                               offset 0x0
	    Alignment: 64 bytes

	    Name                           Offset     Type         Size
	    cmos_layout.bin                0x0        CMOS layout  1159
	    fallback/romstage              0x4c0      stage        339756
	    fallback/ramstage              0x53440    stage        186664
	    fallback/payload               0x80dc0    payload      51526
	    config                         0x8d740    raw          3324
	    (empty)                        0x8e480    null         3610440

config COLLECT_TIMESTAMPS
	bool "Create a table of timestamps collected during boot"
	default y if ARCH_X86
	help
	  Make coreboot create a table of timer-ID/timer-value pairs to
	  allow measuring time spent at different phases of the boot process.

config TIMESTAMPS_ON_CONSOLE
	bool "Print the timestamp values on the console"
	default n
	depends on COLLECT_TIMESTAMPS
	help
	  Print the timestamps to the debug console if enabled at level info.

config USE_BLOBS
	bool "Allow use of binary-only repository"
	default y
	help
	  This draws in the blobs repository, which contains binary files that
	  might be required for some chipsets or boards.
	  This flag ensures that a "Free" option remains available for users.

config USE_AMD_BLOBS
	bool "Allow AMD blobs repository (with license agreement)"
	depends on USE_BLOBS
	help
	  This draws in the amd_blobs repository, which contains binary files
	  distributed by AMD, including VBIOS, PSP bootloaders, SMU firmwares,
	  etc.  Selecting this item to download or clone the repo implies your
	  agreement to the AMD license agreement.  A copy of the license text
	  may be reviewed by reading Documentation/soc/amd/amdblobs_license.md,
	  and your copy of the license is present in the repo once downloaded.

	  Note that for some products, omitting PSP, SMU images, or other items
	  may result in a nonbooting coreboot.rom.

config USE_QC_BLOBS
	bool "Allow QC blobs repository (selecting this agrees to the license!)"
	depends on USE_BLOBS
	help
	  This draws in the qc_blobs repository, which contains binary files
	  distributed by Qualcomm that are required to build firmware for
	  certain Qualcomm SoCs (including QcLib, QC-SEC, qtiseclib and QUP
	  firmware). If you say Y here you are implicitly agreeing to the
	  Qualcomm license agreement which can be found at:
	  https://review.coreboot.org/cgit/qc_blobs.git/tree/LICENSE

	  *****************************************************
	  PLEASE MAKE SURE YOU READ AND AGREE TO ALL TERMS IN
	  ABOVE LICENSE AGREEMENT BEFORE SELECTING THIS OPTION!
	  *****************************************************

	  Not selecting this option means certain Qualcomm SoCs and related
	  mainboards cannot be built and will be hidden from the "Mainboards"
	  section.

config COVERAGE
	bool "Code coverage support"
	depends on COMPILER_GCC
	help
	  Add code coverage support for coreboot. This will store code
	  coverage information in CBMEM for extraction from user space.
	  If unsure, say N.

config UBSAN
	bool "Undefined behavior sanitizer support"
	default n
	help
	  Instrument the code with checks for undefined behavior. If unsure,
	  say N because it adds a small performance penalty and may abort
	  on code that happens to work in spite of the UB.

config HAVE_ASAN_IN_ROMSTAGE
	bool
	default n

config ASAN_IN_ROMSTAGE
	bool
	default n
	help
	  Enable address sanitizer in romstage for platform.

config HAVE_ASAN_IN_RAMSTAGE
	bool
	default n

config ASAN_IN_RAMSTAGE
	bool
	default n
	help
	  Enable address sanitizer in ramstage for platform.

config ASAN
	bool "Address sanitizer support"
	default n
	select ASAN_IN_ROMSTAGE if HAVE_ASAN_IN_ROMSTAGE
	select ASAN_IN_RAMSTAGE if HAVE_ASAN_IN_RAMSTAGE
	depends on COMPILER_GCC
	help
	  Enable address sanitizer - runtime memory debugger,
	  designed to find out-of-bounds accesses and use-after-scope bugs.

	  This feature consumes up to 1/8 of available memory and brings about
	  ~1.5x performance slowdown.

	  If unsure, say N.

if ASAN
	comment "Before using this feature, make sure that           "
	comment "asan_shadow_offset_callback patch is applied to GCC."
endif

choice
	prompt "Stage Cache for ACPI S3 resume"
	default NO_STAGE_CACHE if !HAVE_ACPI_RESUME || MAINBOARD_DISABLE_STAGE_CACHE
	default TSEG_STAGE_CACHE if SMM_TSEG

config NO_STAGE_CACHE
	bool "Disabled"
	help
	  Do not save any component in stage cache for resume path. On resume,
	  all components would be read back from CBFS again.

config TSEG_STAGE_CACHE
	bool "TSEG"
	depends on SMM_TSEG
	help
	  The option enables stage cache support for platform. Platform
	  can stash copies of postcar, ramstage and raw runtime data
	  inside SMM TSEG, to be restored on S3 resume path.

config CBMEM_STAGE_CACHE
	bool "CBMEM"
	depends on !SMM_TSEG
	help
	  The option enables stage cache support for platform. Platform
	  can stash copies of postcar, ramstage and raw runtime data
	  inside CBMEM.

	  While the approach is faster than reloading stages from boot media
	  it is also a possible attack scenario via which OS can possibly
	  circumvent SMM locks and SPI write protections.

	  If unsure, select 'N'

endchoice

config MAINBOARD_DISABLE_STAGE_CACHE
	bool
	help
	  Selected by mainboards which wish to disable the stage cache.
	  E.g. mainboards which don't use S3 resume in the field may wish to
	  disable it to save boot time at the cost of increasing S3 resume time.

config UPDATE_IMAGE
	bool "Update existing coreboot.rom image"
	help
	  If this option is enabled, no new coreboot.rom file
	  is created. Instead it is expected that there already
	  is a suitable file for further processing.
	  The bootblock will not be modified.

	  If unsure, select 'N'

config BOOTSPLASH_IMAGE
	bool "Add a bootsplash image"
	help
	  Select this option if you have a bootsplash image that you would
	  like to add to your ROM.

	  This will only add the image to the ROM. To actually run it check
	  options under 'Display' section.

config BOOTSPLASH_FILE
	string "Bootsplash path and filename"
	depends on BOOTSPLASH_IMAGE
	# Default value set at the end of the file
	help
	  The path and filename of the file to use as graphical bootsplash
	  screen. The file format has to be JPEG with YCC 4:2:0 color sampling
	  unless converted with "Pre-process bootsplash file with ImageMagick".

	  The image can only be displayed by coreboot if it's smaller or has
	  the same size as the framebuffer resolution. Width and height have
	  to be a multiple of 16 pixels.

	  Setting these constraints allows a leaner implementation in coreboot.
	  The minimum necessary ImageMagick command line seems to be:
	  $ convert input.img -colorspace YCC -sampling-factor 4:2:0 bootsplash.jpg

config BOOTSPLASH_CONVERT
	bool "Pre-process bootsplash file with ImageMagick"
	depends on BOOTSPLASH_IMAGE
	help
	  Use ImageMagick (`convert` program) to convert a bootsplash image
	  to the supported JPEG format.

config BOOTSPLASH_CONVERT_QUALITY
	int "Bootsplash JPEG target quality (%)"
	depends on BOOTSPLASH_CONVERT
	range 1 100
	# Default value set at the end of the file

config BOOTSPLASH_CONVERT_RESIZE
	bool "Resize bootsplash image"
	depends on BOOTSPLASH_CONVERT
	help
	  Resize the image to the given resolution. Aspect ratio will be kept,
	  adding black bars as necessary.

config BOOTSPLASH_CONVERT_RESOLUTION
	string "Bootsplash image target size"
	depends on BOOTSPLASH_CONVERT_RESIZE
	# Default value set at the end of the file
	help
	  Target image resolution given as <width>x<height>, e.g. 1024x768.
	  Values not divisible by 16 will be rounded down.

	  When using coreboot to display the bootsplash image (CONFIG_BOOTSPLASH),
	  set this lower or equal to the minimum resolution you expect.

config BOOTSPLASH_CONVERT_COLORSWAP
	bool "Swap red and blue color channels"
	depends on BOOTSPLASH_CONVERT
	help
	  The JPEG decoder currently ignores the framebuffer color order.
	  If your colors seem all wrong, try this option.

config FW_CONFIG
	bool "Firmware Configuration Probing"
	default n
	help
	  Enable support for probing devices with fw_config.  This is a simple
	  bitmask broken into fields and options for probing.

config FW_CONFIG_SOURCE_CHROMEEC_CBI
	bool "Obtain Firmware Configuration value from Google Chrome EC CBI"
	depends on FW_CONFIG && EC_GOOGLE_CHROMEEC
	default n
	help
	  This option tells coreboot to read the firmware configuration value
	  from the Google Chrome Embedded Controller CBI interface.  This source
	  is not tried if FW_CONFIG_SOURCE_CBFS is enabled and the value was
	  found in CBFS.

config FW_CONFIG_SOURCE_CBFS
	bool "Obtain Firmware Configuration value from CBFS"
	depends on FW_CONFIG
	default n
	help
	  With this option enabled coreboot will look for the 32bit firmware
	  configuration value in CBFS at the selected prefix with the file name
	  "fw_config".  This option will override other sources and allow the
	  local image to preempt the mainboard selected source and can be used as
	  FW_CONFIG_SOURCE_CHROMEEC_CBI fallback option.

config FW_CONFIG_SOURCE_VPD
	bool "Obtain Firmware Configuration value from VPD"
	depends on FW_CONFIG && VPD
	default n
	help
	  With this option enabled coreboot will look for the 32bit firmware
	  configuration value in VPD key name "fw_config".  This option will
	  override other sources and allow the local image to preempt the mainboard
	  selected source and can be used for other FW_CONFIG_SOURCEs fallback option.

config HAVE_RAMPAYLOAD
	bool

config RAMPAYLOAD
	bool "Enable coreboot flow without executing ramstage"
	default y if ARCH_X86
	depends on HAVE_RAMPAYLOAD
	help
	  If this option is enabled, coreboot flow will skip ramstage
	  loading and execution of ramstage to load payload.

	  Instead it is expected to load payload from postcar stage itself.

	  In this flow coreboot will perform basic x86 initialization
	  (DRAM resource allocation), MTRR programming,
	  Skip PCI enumeration logic and only allocate BAR for fixed devices
	  (bootable devices, TPM over GSPI).

config HAVE_CONFIGURABLE_RAMSTAGE
	bool

config CONFIGURABLE_RAMSTAGE
	bool "Enable a configurable ramstage."
	default y if ARCH_X86
	depends on HAVE_CONFIGURABLE_RAMSTAGE
	help
	  A configurable ramstage allows you to select which parts of the ramstage
	  to run. Currently, we can only select a minimal PCI scanning step.
	  The minimal PCI scanning will only check those parts that are enabled
	  in the devicetree.cb. By convention none of those devices should be bridges.

config MINIMAL_PCI_SCANNING
	bool "Enable minimal PCI scanning"
	depends on CONFIGURABLE_RAMSTAGE && PCI
	help
	  If this option is enabled, coreboot will scan only PCI devices
	  marked as mandatory in devicetree.cb

menu "Software Bill Of Materials (SBOM)"

source "src/sbom/Kconfig"

endmenu
endmenu

menu "Mainboard"

source "src/mainboard/Kconfig"

config DEVICETREE
	string
	default "devicetree.cb"
	help
	  This symbol allows mainboards to select a different file under their
	  mainboard directory for the devicetree.cb file.  This allows the board
	  variants that need different devicetrees to be in the same directory.

	  Examples: "devicetree.variant.cb"
	            "variant/devicetree.cb"

config OVERRIDE_DEVICETREE
	string
	default ""
	help
	  This symbol allows variants to provide an override devicetree file to
	  override the registers and/or add new devices on top of the ones
	  provided by baseboard devicetree using CONFIG_DEVICETREE.

	  Examples: "devicetree.variant-override.cb"
	            "variant/devicetree-override.cb"

config FMDFILE
	string "fmap description file in fmd format"
	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/chromeos.fmd" if CHROMEOS
	default ""
	help
	  The build system creates a default FMAP from ROM_SIZE and CBFS_SIZE,
	  but in some cases more complex setups are required.
	  When an fmd is specified, it overrides the default format.

config CBFS_SIZE
	hex "Size of CBFS filesystem in ROM"
	depends on FMDFILE = ""
	# Default value set at the end of the file
	help
	  This is the part of the ROM actually managed by CBFS, located at the
	  end of the ROM (passed through cbfstool -o) on x86 and at the start
	  of the ROM (passed through cbfstool -s) everywhere else. It defaults
	  to span the whole ROM on all but Intel systems that use an Intel Firmware
	  Descriptor.  It can be overridden to make coreboot live alongside other
	  components like ChromeOS's vboot/FMAP or Intel's IFD / ME / TXE
	  binaries. This symbol should only be used to generate a default FMAP and
	  is unused when a non-default fmd file is provided via CONFIG_FMDFILE.

endmenu

# load site-local kconfig to allow user specific defaults and overrides
source "site-local/Kconfig"

config SYSTEM_TYPE_LAPTOP
	default n
	bool

config SYSTEM_TYPE_TABLET
	default n
	bool

config SYSTEM_TYPE_DETACHABLE
	default n
	bool

config SYSTEM_TYPE_CONVERTIBLE
	default n
	bool

config CBFS_AUTOGEN_ATTRIBUTES
	default n
	bool
	help
	  If this option is selected, every file in cbfs which has a constraint
	  regarding position or alignment will get an additional file attribute
	  which describes this constraint.

menu "Chipset"

comment "SoC"
source "src/soc/*/*/Kconfig"
source "src/soc/*/*/Kconfig.common"
comment "CPU"
source "src/cpu/Kconfig"
comment "Northbridge"
source "src/northbridge/*/*/Kconfig"
source "src/northbridge/*/*/Kconfig.common"
comment "Southbridge"
source "src/southbridge/*/*/Kconfig"
source "src/southbridge/*/*/Kconfig.common"
comment "Super I/O"
source "src/superio/*/*/Kconfig"
comment "Embedded Controllers"
source "src/ec/acpi/Kconfig"
source "src/ec/*/*/Kconfig"

source "src/southbridge/intel/common/firmware/Kconfig"
source "src/vendorcode/*/Kconfig"

source "src/arch/*/Kconfig"

config CHIPSET_DEVICETREE
	string
	default ""
	help
	  This symbol allows a chipset to provide a set of default settings in
	  a devicetree which are common to all mainboards. This may include
	  devices (including alias names), chip drivers, register settings,
	  and others. This path is relative to the src/ directory.

	  Example: "chipset.cb"

endmenu

source "src/device/Kconfig"

menu "Generic Drivers"
source "src/drivers/*/Kconfig"
source "src/drivers/*/*/Kconfig"
source "src/drivers/*/*/*/Kconfig"
source "src/commonlib/storage/Kconfig"
endmenu

menu "Security"

source "src/security/Kconfig"
source "src/vendorcode/eltan/security/Kconfig"

endmenu

source "src/acpi/Kconfig"

# This option is for the current boards/chipsets where SPI flash
# is not the boot device. Currently nearly all boards/chipsets assume
# SPI flash is the boot device.
config BOOT_DEVICE_NOT_SPI_FLASH
	bool
	default n

config BOOT_DEVICE_SPI_FLASH
	bool
	default y if !BOOT_DEVICE_NOT_SPI_FLASH
	default n

config BOOT_DEVICE_MEMORY_MAPPED
	bool
	default y if ARCH_X86 && BOOT_DEVICE_SPI_FLASH
	default n
	help
	  Inform system if SPI is memory-mapped or not.

config BOOT_DEVICE_SUPPORTS_WRITES
	bool
	default n
	help
	  Indicate that the platform has writable boot device
	  support.

config RTC
	bool
	default n

config HEAP_SIZE
	hex
	default 0x100000

config STACK_SIZE
	hex
	default 0x2000 if ARCH_X86
	default 0x0

config MAX_CPUS
	int
	default 1

source "src/console/Kconfig"

config ACPI_S1_NOT_SUPPORTED
	bool
	default n
	help
	  Set this to 'y' on platforms that do not support ACPI S1 state.

config HAVE_ACPI_RESUME
	bool
	default n

config DISABLE_ACPI_HIBERNATE
	bool
	default n
	help
	  Removes S4 from the available sleepstates

config RESUME_PATH_SAME_AS_BOOT
	bool
	default y if ARCH_X86
	depends on HAVE_ACPI_RESUME
	help
	  This option indicates that when a system resumes it takes the
	  same path as a regular boot. e.g. an x86 system runs from the
	  reset vector at 0xfffffff0 on both resume and warm/cold boot.

config NO_MONOTONIC_TIMER
	def_bool n

config HAVE_MONOTONIC_TIMER
	bool
	depends on !NO_MONOTONIC_TIMER
	default y
	help
	 The board/chipset provides a monotonic timer.

config GENERIC_UDELAY
	bool
	depends on HAVE_MONOTONIC_TIMER
	default y if !ARCH_X86
	help
	 The board/chipset uses a generic udelay function utilizing the
	 monotonic timer.

config TIMER_QUEUE
	def_bool n
	depends on HAVE_MONOTONIC_TIMER
	help
	  Provide a timer queue for performing time-based callbacks.

config COOP_MULTITASKING
	def_bool n
	select TIMER_QUEUE
	depends on ARCH_X86
	help
	  Cooperative multitasking allows callbacks to be multiplexed on the
	  main thread. With this enabled it allows for multiple execution paths
	  to take place when they have udelay() calls within their code.

config NUM_THREADS
	int
	default 4
	depends on COOP_MULTITASKING
	help
	  How many execution threads to cooperatively multitask with.

config HAVE_MAINBOARD_SPECIFIC_OPTION_BACKEND
	bool
	help
	  Selected by mainboards which implement a mainboard-specific mechanism
	  to access the values for runtime-configurable options. For example, a
	  custom BMC interface or an EEPROM with an externally-imposed layout.

config HAVE_OPTION_TABLE
	bool
	default n
	help
	  This variable specifies whether a given board has a cmos.layout
	  file containing NVRAM/CMOS bit definitions.
	  It defaults to 'n' but can be selected in mainboard/*/Kconfig.

config CMOS_LAYOUT_FILE
	string
	default "src/mainboard/\$(MAINBOARDDIR)/cmos.layout"
	depends on HAVE_OPTION_TABLE

config PCI_IO_CFG_EXT
	bool
	default n

config IOAPIC
	bool
	default y if SMP
	default n

config USE_WATCHDOG_ON_BOOT
	bool
	default n

config GFXUMA
	bool
	default n
	help
	  Enable Unified Memory Architecture for graphics.

config HAVE_MP_TABLE
	bool
	help
	  This variable specifies whether a given board has MP table support.
	  It is usually set in mainboard/*/Kconfig.
	  Whether or not the MP table is actually generated by coreboot
	  is configurable by the user via GENERATE_MP_TABLE.

config HAVE_PIRQ_TABLE
	bool
	help
	  This variable specifies whether a given board has PIRQ table support.
	  It is usually set in mainboard/*/Kconfig.
	  Whether or not the PIRQ table is actually generated by coreboot
	  is configurable by the user via GENERATE_PIRQ_TABLE.

config ACPI_NHLT
	bool
	default n
	help
	  Build support for NHLT (non HD Audio) ACPI table generation.

#These Options are here to avoid "undefined" warnings.
#The actual selection and help texts are in the following menu.

menu "System tables"

config GENERATE_MP_TABLE
	prompt "Generate an MP table" if HAVE_MP_TABLE
	bool
	depends on !ECAM_MMCONF_SUPPORT || ECAM_MMCONF_BUS_NUMBER <= 256
	default HAVE_MP_TABLE
	help
	  Generate an MP table (conforming to the Intel MultiProcessor
	  specification 1.4) for this board.

	  If unsure, say Y.

config GENERATE_PIRQ_TABLE
	prompt "Generate a PIRQ table" if HAVE_PIRQ_TABLE
	bool
	default HAVE_PIRQ_TABLE
	help
	  Generate a PIRQ table for this board.

	  If unsure, say Y.

config GENERATE_SMBIOS_TABLES
	depends on ARCH_X86
	bool "Generate SMBIOS tables"
	default y
	help
	  Generate SMBIOS tables for this board.

	  If unsure, say Y.

config SMBIOS_TYPE41_PROVIDED_BY_DEVTREE
	bool
	depends on ARCH_X86
	help
	  If enabled, only generate SMBIOS Type 41 entries for PCI devices in
	  the devicetree for which Type 41 information is provided, e.g. with
	  the `smbios_dev_info` devicetree syntax. This is useful to manually
	  assign specific instance IDs to onboard devices irrespective of the
	  device traversal order. It is assumed that instance IDs for devices
	  of the same class are unique.
	  When disabled, coreboot autogenerates SMBIOS Type 41 entries for all
	  appropriate PCI devices in the devicetree. Instance IDs are assigned
	  successive numbers from a monotonically increasing counter, with one
	  counter for each device class.

config SMBIOS_PROVIDED_BY_MOBO
	bool
	default n

if GENERATE_SMBIOS_TABLES

config BIOS_VENDOR
	prompt "SMBIOS BIOS Vendor name"
	string
	default "coreboot"
	help
	  The BIOS Vendor name to store in the SMBIOS Type0 table.

config MAINBOARD_SERIAL_NUMBER
	prompt "SMBIOS Serial Number" if !SMBIOS_PROVIDED_BY_MOBO
	string
	default "123456789"
	help
	  The Serial Number to store in SMBIOS structures.

config MAINBOARD_VERSION
	prompt "SMBIOS Version Number" if !SMBIOS_PROVIDED_BY_MOBO
	string
	default "1.0"
	help
	  The Version Number to store in SMBIOS structures.

config MAINBOARD_SMBIOS_MANUFACTURER
	prompt "SMBIOS Manufacturer" if !SMBIOS_PROVIDED_BY_MOBO
	string
	default MAINBOARD_VENDOR
	help
	  Override the default Manufacturer stored in SMBIOS structures.

config MAINBOARD_SMBIOS_PRODUCT_NAME
	prompt "SMBIOS Product name" if !SMBIOS_PROVIDED_BY_MOBO
	string
	default MAINBOARD_PART_NUMBER
	help
	  Override the default Product name stored in SMBIOS structures.

config VPD_SMBIOS_VERSION
	bool "Populates SMBIOS type 0 version from the VPD_RO variable 'firmware_version'"
	default n
	depends on VPD
	help
	  Selecting this option will read firmware_version from
	  VPD_RO and override SMBIOS type 0 version. One special
	  scenario of using this feature is to assign a BIOS version
	  to a coreboot image without the need to rebuild from source.

endif

endmenu

source "payloads/Kconfig"

menu "Debugging"

comment "CPU Debug Settings"
source "src/cpu/*/Kconfig.debug_cpu"

comment "Vendorcode Debug Settings"
	source "src/vendorcode/*/*/Kconfig.debug"

comment "BLOB Debug Settings"
source "src/drivers/intel/fsp*/Kconfig.debug_blob"

comment "General Debug Settings"

# TODO: Better help text and detailed instructions.
config GDB_STUB
	bool "GDB debugging support"
	default n
	depends on DRIVERS_UART
	help
	  If enabled, you will be able to set breakpoints for gdb debugging.
	  See src/arch/x86/c_start.S for details.

config GDB_WAIT
	bool "Wait for a GDB connection in the ramstage"
	default n
	depends on GDB_STUB
	help
	  If enabled, coreboot will wait for a GDB connection in the ramstage.


config FATAL_ASSERTS
	bool "Halt when hitting a BUG() or assertion error"
	default n
	help
	  If enabled, coreboot will call hlt() on a BUG() or failed ASSERT().

config HAVE_DEBUG_GPIO
	bool

config DEBUG_GPIO
	bool "Output verbose GPIO debug messages"
	depends on HAVE_DEBUG_GPIO

config DEBUG_CBFS
	bool "Output verbose CBFS debug messages"
	default n
	help
	  This option enables additional CBFS related debug messages.

config HAVE_DEBUG_RAM_SETUP
	def_bool n

config DEBUG_RAM_SETUP
	bool "Output verbose RAM init debug messages"
	default n
	depends on HAVE_DEBUG_RAM_SETUP
	help
	  This option enables additional RAM init related debug messages.
	  It is recommended to enable this when debugging issues on your
	  board which might be RAM init related.

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

config DEBUG_PIRQ
	bool "Check PIRQ table consistency"
	default n
	depends on GENERATE_PIRQ_TABLE
	help
	  If unsure, say N.

config HAVE_DEBUG_SMBUS
	def_bool n

config DEBUG_SMBUS
	bool "Output verbose SMBus debug messages"
	default n
	depends on HAVE_DEBUG_SMBUS
	help
	  This option enables additional SMBus (and SPD) debug messages.

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

config DEBUG_SMI
	bool "Output verbose SMI debug messages"
	default n
	depends on HAVE_SMI_HANDLER
	select SPI_FLASH_SMM if EM100PRO_SPI_CONSOLE || CONSOLE_SPI_FLASH
	help
	  This option enables additional SMI related debug messages.

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

config DEBUG_PERIODIC_SMI
	bool "Trigger SMI periodically"
	depends on DEBUG_SMI

# Only visible if debug level is DEBUG (7) or SPEW (8) as it does additional
# printk(BIOS_DEBUG, ...) calls.
config DEBUG_MALLOC
	prompt "Output verbose malloc debug messages" if DEFAULT_CONSOLE_LOGLEVEL_7 || DEFAULT_CONSOLE_LOGLEVEL_8 || CONSOLE_OVERRIDE_LOGLEVEL
	bool
	default n
	help
	  This option enables additional malloc related debug messages.

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

# Only visible if DEBUG_SPEW (8) is set.
config DEBUG_RESOURCES
	bool "Output verbose PCI MEM and IO resource debug messages" if DEFAULT_CONSOLE_LOGLEVEL_8 || CONSOLE_OVERRIDE_LOGLEVEL
	default n
	help
	  This option enables additional PCI memory and IO debug messages.
	  Note: This option will increase the size of the coreboot image.
	  If unsure, say N.

config DEBUG_CONSOLE_INIT
	bool "Debug console initialisation code"
	default n
	help
	  With this option printk()'s are attempted before console hardware
	  initialisation has been completed. Your mileage may vary.

	  Typically you will need to modify source in console_hw_init() such
	  that a working console appears before the one you want to debug.

	  If unsure, say N.

# Only visible if debug level is DEBUG (7) or SPEW (8) as it does additional
# printk(BIOS_DEBUG, ...) calls.
config REALMODE_DEBUG
	prompt "Enable debug messages for option ROM execution" if DEFAULT_CONSOLE_LOGLEVEL_7 || DEFAULT_CONSOLE_LOGLEVEL_8 || CONSOLE_OVERRIDE_LOGLEVEL
	bool
	default n
	depends on PCI_OPTION_ROM_RUN_REALMODE
	help
	  This option enables additional x86emu related debug messages.

	  Note: This option will increase the time to emulate a ROM.

	  If unsure, say N.

config X86EMU_DEBUG
	bool "Output verbose x86emu debug messages"
	default n
	depends on PCI_OPTION_ROM_RUN_YABEL
	help
	  This option enables additional x86emu related debug messages.

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

if X86EMU_DEBUG

config X86EMU_DEBUG_JMP
	bool "Trace JMP/RETF"
	default n
	help
	  Print information about JMP and RETF opcodes from x86emu.

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

config X86EMU_DEBUG_TRACE
	bool "Trace all opcodes"
	default n
	help
	  Print _all_ opcodes that are executed by x86emu.

	  WARNING: This will produce a LOT of output and take a long time.

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

config X86EMU_DEBUG_PNP
	bool "Log Plug&Play accesses"
	default n
	help
	  Print Plug And Play accesses made by option ROMs.

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

config X86EMU_DEBUG_DISK
	bool "Log Disk I/O"
	default n
	help
	  Print Disk I/O related messages.

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

config X86EMU_DEBUG_PMM
	bool "Log PMM"
	default n
	help
	  Print messages related to POST Memory Manager (PMM).

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.


config X86EMU_DEBUG_VBE
	bool "Debug VESA BIOS Extensions"
	default n
	help
	  Print messages related to VESA BIOS Extension (VBE) functions.

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

config X86EMU_DEBUG_INT10
	bool "Redirect INT10 output to console"
	default n
	help
	  Let INT10 (i.e. character output) calls print messages to debug output.

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

config X86EMU_DEBUG_INTERRUPTS
	bool "Log intXX calls"
	default n
	help
	  Print messages related to interrupt handling.

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

config X86EMU_DEBUG_CHECK_VMEM_ACCESS
	bool "Log special memory accesses"
	default n
	help
	  Print messages related to accesses to certain areas of the virtual
	  memory (e.g. BDA (BIOS Data Area) or interrupt vectors)

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

config X86EMU_DEBUG_MEM
	bool "Log all memory accesses"
	default n
	help
	  Print memory accesses made by option ROM.
	  Note: This also includes accesses to fetch instructions.

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

config X86EMU_DEBUG_IO
	bool "Log IO accesses"
	default n
	help
	  Print I/O accesses made by option ROM.

	  Note: This option will increase the size of the coreboot image.

	  If unsure, say N.

config X86EMU_DEBUG_TIMINGS
	bool "Output timing information"
	default n
	depends on HAVE_MONOTONIC_TIMER
	help
	  Print timing information needed by i915tool.

	  If unsure, say N.

endif

config DEBUG_SPI_FLASH
	bool "Output verbose SPI flash debug messages"
	default n
	depends on SPI_FLASH
	help
	  This option enables additional SPI flash related debug messages.

config DEBUG_IPMI
	bool "Output verbose IPMI debug messages"
	default n
	depends on IPMI_KCS
	help
	  This option enables additional IPMI related debug messages.

if SOUTHBRIDGE_INTEL_BD82X6X && DEFAULT_CONSOLE_LOGLEVEL_8
# Only visible with the right southbridge and loglevel.
config DEBUG_INTEL_ME
	bool "Verbose logging for Intel Management Engine"
	default n
	help
	  Enable verbose logging for Intel Management Engine driver that
	  is present on Intel 6-series chipsets.
endif

config DEBUG_FUNC
	bool "Enable function entry and exit reporting macros" if DEFAULT_CONSOLE_LOGLEVEL_8 || CONSOLE_OVERRIDE_LOGLEVEL
	default n
	help
	  This option enables additional function entry and exit debug messages
	  for select functions.
	  Note: This option will increase the size of the coreboot image.
	  If unsure, say N.

config DEBUG_COVERAGE
	bool "Debug code coverage"
	default n
	depends on COVERAGE
	help
	  If enabled, the code coverage hooks in coreboot will output some
	  information about the coverage data that is dumped.

config DEBUG_BOOT_STATE
	bool "Debug boot state machine"
	default n
	help
	  Control debugging of the boot state machine.  When selected displays
	  the state boundaries in ramstage.

config DEBUG_ADA_CODE
	bool "Compile debug code in Ada sources"
	default n
	help
	  Add the compiler switch `-gnata` to compile code guarded by
	  `pragma Debug`.

config HAVE_EM100_SUPPORT
	bool
	help
	  This is enabled by platforms which can support using the EM100.

config EM100
	bool "Configure image for EM100 usage"
	depends on HAVE_EM100_SUPPORT
	help
	  The Dediprog EM100 SPI emulator allows fast loading of new SPI images
	  over USB. However it only supports a maximum SPI clock of 20MHz and
	  single data output. Enable this option to use a 20MHz SPI clock and
	  disable "Dual Output Fast Read" Support.

	  On AMD platforms this changes the SPI speed at run-time if the
	  mainboard code supports this. On supported Intel platforms this works
	  by changing the settings in the descriptor.bin file.

config DEBUG_ACPICA_COMPATIBLE
	bool "Print out ACPI tables in ACPICA compatible format"
	depends on HAVE_ACPI_TABLES
	help
	  Select this to print out ACPI tables in an ACPICA compatible
	  format. Set the console loglevel to verbosity 'SPEW'.
	  To analyze ACPI tables capture the coreboot log between
	  "Printing ACPI in ACPICA compatible table" and "Done printing
	  ACPI in ACPICA compatible table".
	  Remove the prefix "[SPEW ]  " and then issue 'acpixtract -a dump'
	  to extract all the tables. Then use 'iasl -d' on the .dat files
	  to decompile the tables.

endmenu

###############################################################################
# Set variables with no prompt - these can be set anywhere, and putting at
# the end of this file gives the most flexibility.

source "src/lib/Kconfig"

config WARNINGS_ARE_ERRORS
	bool
	default y

# The four POWER_BUTTON_DEFAULT_ENABLE, POWER_BUTTON_DEFAULT_DISABLE,
# POWER_BUTTON_FORCE_ENABLE and POWER_BUTTON_FORCE_DISABLE options are
# mutually exclusive. One of these options must be selected in the
# mainboard Kconfig if the chipset supports enabling and disabling of
# the power button. Chipset code uses the ENABLE_POWER_BUTTON option set
# in mainboard/Kconfig to know if the button should be enabled or not.

config POWER_BUTTON_DEFAULT_ENABLE
	def_bool n
	help
	  Select when the board has a power button which can optionally be
	  disabled by the user.

config POWER_BUTTON_DEFAULT_DISABLE
	def_bool n
	help
	  Select when the board has a power button which can optionally be
	  enabled by the user, e.g. when the board ships with a jumper over
	  the power switch contacts.

config POWER_BUTTON_FORCE_ENABLE
	def_bool n
	help
	  Select when the board requires that the power button is always
	  enabled.

config POWER_BUTTON_FORCE_DISABLE
	def_bool n
	help
	  Select when the board requires that the power button is always
	  disabled, e.g. when it has been hardwired to ground.

config POWER_BUTTON_IS_OPTIONAL
	bool
	default y if POWER_BUTTON_DEFAULT_ENABLE || POWER_BUTTON_DEFAULT_DISABLE
	default n if !(POWER_BUTTON_DEFAULT_ENABLE || POWER_BUTTON_DEFAULT_DISABLE)
	help
	  Internal option that controls ENABLE_POWER_BUTTON visibility.

config REG_SCRIPT
	bool
	default n
	help
	  Internal option that controls whether we compile in register scripts.

config MAX_REBOOT_CNT
	int
	default 3
	help
	  Internal option that sets the maximum number of bootblock executions allowed
	  with the normal image enabled before assuming the normal image is defective
	  and switching to the fallback image.

config UNCOMPRESSED_RAMSTAGE
	bool

config NO_XIP_EARLY_STAGES
	bool
	default n if ARCH_X86
	default y
	help
	  Identify if early stages are eXecute-In-Place(XIP).

config EARLY_CBMEM_LIST
	bool
	default n
	help
	  Enable display of CBMEM during romstage and postcar.

config RELOCATABLE_MODULES
	bool
	help
	  If RELOCATABLE_MODULES is selected then support is enabled for
	  building relocatable modules in the RAM stage. Those modules can be
	  loaded anywhere and all the relocations are handled automatically.

config GENERIC_GPIO_LIB
	bool
	help
	  If enabled, compile the generic GPIO library. A "generic" GPIO
	  implies configurability usually found on SoCs, particularly the
	  ability to control internal pull resistors.

config BOOTBLOCK_CUSTOM
	# To be selected by arch, SoC or mainboard if it does not want use the normal
	# src/lib/bootblock.c#main() C entry point.
	bool

config BOOTBLOCK_IN_CBFS
	bool
	default y if ARCH_X86
	help
	  Select this on platforms that have a top aligned bootblock inside cbfs.

config MEMLAYOUT_LD_FILE
	string
	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/memlayout.ld"
	help
	  This variable allows SoC/mainboard to supply in a custom linker file
	  if required. This determines the linker file used for all the stages
	  (bootblock, romstage, verstage, ramstage, postcar) in
	  src/arch/${ARCH}/Makefile.mk.

###############################################################################
# Set default values for symbols created before mainboards.  This allows the
# option to be displayed in the general menu, but the default to be loaded in
# the mainboard if desired.
config COMPRESS_PRERAM_STAGES
	depends on (HAVE_ROMSTAGE || HAVE_VERSTAGE) && NO_XIP_EARLY_STAGES
	default y

config INCLUDE_CONFIG_FILE
	default y

config BOOTSPLASH_FILE
	depends on BOOTSPLASH_IMAGE
	default "bootsplash.jpg"

config BOOTSPLASH_CONVERT_QUALITY
	depends on BOOTSPLASH_CONVERT
	default 80

config BOOTSPLASH_CONVERT_RESOLUTION
	depends on BOOTSPLASH_CONVERT_RESIZE
	default "1024x768"

config CBFS_SIZE
	default ROM_SIZE

config HAVE_BOOTBLOCK
	bool
	default y

config HAVE_VERSTAGE
	bool
	depends on VBOOT_SEPARATE_VERSTAGE
	default y

config HAVE_ROMSTAGE
	bool
	depends on SEPARATE_ROMSTAGE
	default y

config HAVE_RAMSTAGE
	bool
	default n if RAMPAYLOAD
	default y

config SEPARATE_ROMSTAGE
	default y