Kconfig - platform/external/u-boot - Gitiles

 #
 # For a description of the syntax of this configuration file,
 # see the file Documentation/kbuild/kconfig-language.txt in the
 # Linux kernel source tree.
 #
 mainmenu "U-Boot $UBOOTVERSION Configuration"

 config UBOOTVERSION
 	string
 	option env="UBOOTVERSION"

 # Allow defaults in arch-specific code to override any given here
 source "arch/Kconfig"

 menu "General setup"

 config BROKEN
 	bool
 	help
 	  This option cannot be enabled. It is used as dependency
 	  for broken and incomplete features.

 config LOCALVERSION
 	string "Local version - append to U-Boot release"
 	help
 	  Append an extra string to the end of your U-Boot version.
 	  This will show up in your boot log, for example.
 	  The string you set here will be appended after the contents of
 	  any files with a filename matching localversion* in your
 	  object and source tree, in that order.  Your total string can
 	  be a maximum of 64 characters.

 config LOCALVERSION_AUTO
 	bool "Automatically append version information to the version string"
 	default y
 	help
 	  This will try to automatically determine if the current tree is a
 	  release tree by looking for Git tags that belong to the current
 	  top of tree revision.

 	  A string of the format -gxxxxxxxx will be added to the localversion
 	  if a Git-based tree is found.  The string generated by this will be
 	  appended after any matching localversion* files, and after the value
 	  set in CONFIG_LOCALVERSION.

 	  (The actual string used here is the first eight characters produced
 	  by running the command:

 	    $ git rev-parse --verify HEAD

 	  which is done within the script "scripts/setlocalversion".)

 config CC_OPTIMIZE_FOR_SIZE
 	bool "Optimize for size"
 	default y
 	help
 	  Enabling this option will pass "-Os" instead of "-O2" to gcc
 	  resulting in a smaller U-Boot image.

 	  This option is enabled by default for U-Boot.

 config CC_COVERAGE
 	bool "Enable code coverage analysis"
 	depends on SANDBOX
 	help
 	  Enabling this option will pass "--coverage" to gcc to compile
 	  and link code instrumented for coverage analysis.

 config DISTRO_DEFAULTS
 	bool "Select defaults suitable for booting general purpose Linux distributions"
 	select AUTO_COMPLETE
 	select CMDLINE_EDITING
 	select CMD_BOOTI if ARM64
 	select CMD_BOOTZ if ARM && !ARM64
 	select CMD_DHCP if CMD_NET
 	select CMD_ENV_EXISTS
 	select CMD_EXT2
 	select CMD_EXT4
 	select CMD_FAT
 	select CMD_FS_GENERIC
 	select CMD_PART if PARTITIONS
 	select CMD_PING if CMD_NET
 	select CMD_PXE if NET
 	select ENV_VARS_UBOOT_CONFIG
 	select HUSH_PARSER
 	select SUPPORT_RAW_INITRD
 	select SYS_LONGHELP
 	imply CMD_MII if NET
 	imply USE_BOOTCOMMAND
 	help
 	  Select this to enable various options and commands which are suitable
 	  for building u-boot for booting general purpose Linux distributions.

 config ENV_VARS_UBOOT_CONFIG
 	bool "Add arch, board, vendor and soc variables to default environment"
 	help
 	  Define this in order to add variables describing the
 	  U-Boot build configuration to the default environment.
 	  These will be named arch, cpu, board, vendor, and soc.
 	  Enabling this option will cause the following to be defined:
 	  - CONFIG_SYS_ARCH
 	  - CONFIG_SYS_CPU
 	  - CONFIG_SYS_BOARD
 	  - CONFIG_SYS_VENDOR
 	  - CONFIG_SYS_SOC

 config SYS_BOOT_GET_CMDLINE
 	bool "Enable kernel command line setup"
 	help
 	  Enables allocating and saving kernel cmdline in space between
 	  "bootm_low" and "bootm_low" + BOOTMAPSZ.

 config SYS_BOOT_GET_KBD
 	bool "Enable kernel board information setup"
 	help
 	  Enables allocating and saving a kernel copy of the bd_info in
 	  space between "bootm_low" and "bootm_low" + BOOTMAPSZ.

 config SYS_MALLOC_F
 	bool "Enable malloc() pool before relocation"
 	default y if DM
 	help
 	  Before relocation, memory is very limited on many platforms. Still,
 	  we can provide a small malloc() pool if needed. Driver model in
 	  particular needs this to operate, so that it can allocate the
 	  initial serial device and any others that are needed.

 config SYS_MALLOC_F_LEN
 	hex "Size of malloc() pool before relocation"
 	depends on SYS_MALLOC_F
 	default 0x1000 if AM33XX
 	default 0x400
 	help
 	  Before relocation, memory is very limited on many platforms. Still,
 	  we can provide a small malloc() pool if needed. Driver model in
 	  particular needs this to operate, so that it can allocate the
 	  initial serial device and any others that are needed.

 config SPL_SYS_MALLOC_F_LEN
         hex "Size of malloc() pool in SPL before relocation"
         depends on SYS_MALLOC_F
         default SYS_MALLOC_F_LEN
         help
           Before relocation, memory is very limited on many platforms. Still,
           we can provide a small malloc() pool if needed. Driver model in
           particular needs this to operate, so that it can allocate the
           initial serial device and any others that are needed.

 config TPL_SYS_MALLOC_F_LEN
         hex "Size of malloc() pool in TPL before relocation"
         depends on SYS_MALLOC_F
         default SYS_MALLOC_F_LEN
         help
           Before relocation, memory is very limited on many platforms. Still,
           we can provide a small malloc() pool if needed. Driver model in
           particular needs this to operate, so that it can allocate the
           initial serial device and any others that are needed.

 menuconfig EXPERT
 	bool "Configure standard U-Boot features (expert users)"
 	default y
 	help
 	  This option allows certain base U-Boot options and settings
 	  to be disabled or tweaked. This is for specialized
 	  environments which can tolerate a "non-standard" U-Boot.
 	  Use this only if you really know what you are doing.

 if EXPERT
 	config SYS_MALLOC_CLEAR_ON_INIT
 	bool "Init with zeros the memory reserved for malloc (slow)"
 	default y
 	help
 	  This setting is enabled by default. The reserved malloc
 	  memory is initialized with zeros, so first malloc calls
 	  will return the pointer to the zeroed memory. But this
 	  slows the boot time.

 	  It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
 	  value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
 	  Then the boot time can be significantly reduced.
 	  Warning:
 	  When disabling this, please check if malloc calls, maybe
 	  should be replaced by calloc - if one expects zeroed memory.

 config TOOLS_DEBUG
 	bool "Enable debug information for tools"
 	help
 	  Enable generation of debug information for tools such as mkimage.
 	  This can be used for debugging purposes. With debug information
 	  it is possible to set breakpoints on particular lines, single-step
 	  debug through the source code, etc.

 endif # EXPERT

 config PHYS_64BIT
 	bool "64bit physical address support"
 	help
 	  Say Y here to support 64bit physical memory address.
 	  This can be used not only for 64bit SoCs, but also for
 	  large physical address extention on 32bit SoCs.

 config BUILD_ROM
 	bool "Build U-Boot as BIOS replacement"
 	depends on X86
 	help
 	  This option allows to build a ROM version of U-Boot.
 	  The build process generally requires several binary blobs
 	  which are not shipped in the U-Boot source tree.
 	  Please, see doc/README.x86 for details.

 endmenu		# General setup

 menu "Boot images"

 config ANDROID_BOOT_IMAGE
 	bool "Enable support for Android Boot Images"
 	default y if FASTBOOT
 	help
 	  This enables support for booting images which use the Android
 	  image format header.

 config FIT
 	bool "Support Flattened Image Tree"
 	select MD5
 	select SHA1
 	help
 	  This option allows you to boot the new uImage structure,
 	  Flattened Image Tree.  FIT is formally a FDT, which can include
 	  images of various types (kernel, FDT blob, ramdisk, etc.)
 	  in a single blob.  To boot this new uImage structure,
 	  pass the address of the blob to the "bootm" command.
 	  FIT is very flexible, supporting compression, multiple images,
 	  multiple configurations, verification through hashing and also
 	  verified boot (secure boot using RSA).

 if FIT

 config FIT_ENABLE_SHA256_SUPPORT
 	bool "Support SHA256 checksum of FIT image contents"
 	default y
 	select SHA256
 	help
 	  Enable this to support SHA256 checksum of FIT image contents. A
 	  SHA256 checksum is a 256-bit (32-byte) hash value used to check that
 	  the image contents have not been corrupted. SHA256 is recommended
 	  for use in secure applications since (as at 2016) there is no known
 	  feasible attack that could produce a 'collision' with differing
 	  input data. Use this for the highest security. Note that only the
 	  SHA256 variant is supported: SHA512 and others are not currently
 	  supported in U-Boot.

 config FIT_SIGNATURE
 	bool "Enable signature verification of FIT uImages"
 	depends on DM
 	select HASH
 	select RSA
 	help
 	  This option enables signature verification of FIT uImages,
 	  using a hash signed and verified using RSA. If
 	  CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
 	  hashing is available using hardware, then the RSA library will use
 	  it. See doc/uImage.FIT/signature.txt for more details.

 	  WARNING: When relying on signed FIT images with a required signature
 	  check the legacy image format is disabled by default, so that
 	  unsigned images cannot be loaded. If a board needs the legacy image
 	  format support in this case, enable it using
 	  CONFIG_IMAGE_FORMAT_LEGACY.

 config FIT_SIGNATURE_MAX_SIZE
 	hex "Max size of signed FIT structures"
 	depends on FIT_SIGNATURE
 	default 0x10000000
 	help
 	  This option sets a max size in bytes for verified FIT uImages.
 	  A sane value of 256MB protects corrupted DTB structures from overlapping
 	  device memory. Assure this size does not extend past expected storage
 	  space.

 config FIT_VERBOSE
 	bool "Show verbose messages when FIT images fail"
 	help
 	  Generally a system will have valid FIT images so debug messages
 	  are a waste of code space. If you are debugging your images then
 	  you can enable this option to get more verbose information about
 	  failures.

 config FIT_BEST_MATCH
 	bool "Select the best match for the kernel device tree"
 	help
 	  When no configuration is explicitly selected, default to the
 	  one whose fdt's compatibility field best matches that of
 	  U-Boot itself. A match is considered "best" if it matches the
 	  most specific compatibility entry of U-Boot's fdt's root node.
 	  The order of entries in the configuration's fdt is ignored.

 config FIT_IMAGE_POST_PROCESS
 	bool "Enable post-processing of FIT artifacts after loading by U-Boot"
 	depends on TI_SECURE_DEVICE
 	help
 	  Allows doing any sort of manipulation to blobs after they got extracted
 	  from FIT images like stripping off headers or modifying the size of the
 	  blob, verification, authentication, decryption etc. in a platform or
 	  board specific way. In order to use this feature a platform or board-
 	  specific implementation of board_fit_image_post_process() must be
 	  provided. Also, anything done during this post-processing step would
 	  need to be comprehended in how the images were prepared before being
 	  injected into the FIT creation (i.e. the blobs would have been pre-
 	  processed before being added to the FIT image).

 if SPL

 config SPL_FIT
 	bool "Support Flattened Image Tree within SPL"
 	depends on SPL
 	select SPL_OF_LIBFDT

 config SPL_FIT_PRINT
 	bool "Support FIT printing within SPL"
 	depends on SPL_FIT
 	help
 	  Support printing the content of the fitImage in a verbose manner in SPL.

 config SPL_FIT_SIGNATURE
 	bool "Enable signature verification of FIT firmware within SPL"
 	depends on SPL_DM
 	select SPL_FIT
 	select SPL_RSA

 config SPL_LOAD_FIT
 	bool "Enable SPL loading U-Boot as a FIT"
 	select SPL_FIT
 	help
 	  Normally with the SPL framework a legacy image is generated as part
 	  of the build. This contains U-Boot along with information as to
 	  where it should be loaded. This option instead enables generation
 	  of a FIT (Flat Image Tree) which provides more flexibility. In
 	  particular it can handle selecting from multiple device tree
 	  and passing the correct one to U-Boot.

 config SPL_LOAD_FIT_FULL
 	bool "Enable SPL loading U-Boot as a FIT"
 	select SPL_FIT
 	help
 	  Normally with the SPL framework a legacy image is generated as part
 	  of the build. This contains U-Boot along with information as to
 	  where it should be loaded. This option instead enables generation
 	  of a FIT (Flat Image Tree) which provides more flexibility. In
 	  particular it can handle selecting from multiple device tree
 	  and passing the correct one to U-Boot.

 config SPL_FIT_IMAGE_POST_PROCESS
 	bool "Enable post-processing of FIT artifacts after loading by the SPL"
 	depends on SPL_LOAD_FIT
 	help
 	  Allows doing any sort of manipulation to blobs after they got extracted
 	  from the U-Boot FIT image like stripping off headers or modifying the
 	  size of the blob, verification, authentication, decryption etc. in a
 	  platform or board specific way. In order to use this feature a platform
 	  or board-specific implementation of board_fit_image_post_process() must
 	  be provided. Also, anything done during this post-processing step would
 	  need to be comprehended in how the images were prepared before being
 	  injected into the FIT creation (i.e. the blobs would have been pre-
 	  processed before being added to the FIT image).

 config SPL_FIT_SOURCE
 	string ".its source file for U-Boot FIT image"
 	depends on SPL_FIT
 	help
 	  Specifies a (platform specific) FIT source file to generate the
 	  U-Boot FIT image. This could specify further image to load and/or
 	  execute.

 config SPL_FIT_GENERATOR
 	string ".its file generator script for U-Boot FIT image"
 	depends on SPL_FIT
 	default "board/sunxi/mksunxi_fit_atf.sh" if SPL_LOAD_FIT && ARCH_SUNXI
 	help
 	  Specifies a (platform specific) script file to generate the FIT
 	  source file used to build the U-Boot FIT image file. This gets
 	  passed a list of supported device tree file stub names to
 	  include in the generated image.

 endif # SPL

 endif # FIT

 config IMAGE_FORMAT_LEGACY
 	bool "Enable support for the legacy image format"
 	default y if !FIT_SIGNATURE
 	help
 	  This option enables the legacy image format. It is enabled by
 	  default for backward compatibility, unless FIT_SIGNATURE is
 	  set where it is disabled so that unsigned images cannot be
 	  loaded. If a board needs the legacy image format support in this
 	  case, enable it here.

 config OF_BOARD_SETUP
 	bool "Set up board-specific details in device tree before boot"
 	depends on OF_LIBFDT
 	help
 	  This causes U-Boot to call ft_board_setup() before booting into
 	  the Operating System. This function can set up various
 	  board-specific information in the device tree for use by the OS.
 	  The device tree is then passed to the OS.

 config OF_SYSTEM_SETUP
 	bool "Set up system-specific details in device tree before boot"
 	depends on OF_LIBFDT
 	help
 	  This causes U-Boot to call ft_system_setup() before booting into
 	  the Operating System. This function can set up various
 	  system-specific information in the device tree for use by the OS.
 	  The device tree is then passed to the OS.

 config OF_STDOUT_VIA_ALIAS
 	bool "Update the device-tree stdout alias from U-Boot"
 	depends on OF_LIBFDT
 	help
 	  This uses U-Boot's serial alias from the aliases node to update
 	  the device tree passed to the OS. The "linux,stdout-path" property
 	  in the chosen node is set to point to the correct serial node.
 	  This option currently references CONFIG_CONS_INDEX, which is
 	  incorrect when used with device tree as this option does not
 	  exist / should not be used.

 config SYS_EXTRA_OPTIONS
 	string "Extra Options (DEPRECATED)"
 	help
 	  The old configuration infrastructure (= mkconfig + boards.cfg)
 	  provided the extra options field. If you have something like
 	  "HAS_BAR,BAZ=64", the optional options
 	    #define CONFIG_HAS
 	    #define CONFIG_BAZ	64
 	  will be defined in include/config.h.
 	  This option was prepared for the smooth migration from the old
 	  configuration to Kconfig. Since this option will be removed sometime,
 	  new boards should not use this option.

 config SYS_TEXT_BASE
 	depends on !NIOS2 && !XTENSA
 	depends on !EFI_APP
 	default 0x80800000 if ARCH_OMAP2PLUS
 	default 0x4a000000 if ARCH_SUNXI && !MACH_SUN9I && !MACH_SUN8I_V3S
 	default 0x2a000000 if ARCH_SUNXI && MACH_SUN9I
 	default 0x42e00000 if ARCH_SUNXI && MACH_SUN8I_V3S
 	hex "Text Base"
 	help
 	  The address in memory that U-Boot will be running from, initially.


 config SYS_CLK_FREQ
 	depends on ARC || ARCH_SUNXI
 	int "CPU clock frequency"
 	help
 	  TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture

 config ARCH_FIXUP_FDT_MEMORY
 	bool "Enable arch_fixup_memory_banks() call"
 	default y
 	help
 	  Enable FDT memory map syncup before OS boot. This feature can be
 	  used for booting OS with different memory setup where the part of
 	  the memory location should be used for different purpose.

 endmenu		# Boot images

 source "api/Kconfig"

 source "common/Kconfig"

 source "cmd/Kconfig"

 source "disk/Kconfig"

 source "dts/Kconfig"

 source "env/Kconfig"

 source "net/Kconfig"

 source "drivers/Kconfig"

 source "fs/Kconfig"

 source "lib/Kconfig"

 source "test/Kconfig"
	#
	# For a description of the syntax of this configuration file,
	# see the file Documentation/kbuild/kconfig-language.txt in the
	# Linux kernel source tree.
	#
	mainmenu "U-Boot $UBOOTVERSION Configuration"

	config UBOOTVERSION
	string
	option env="UBOOTVERSION"

	# Allow defaults in arch-specific code to override any given here
	source "arch/Kconfig"

	menu "General setup"

	config BROKEN
	bool
	help
	This option cannot be enabled. It is used as dependency
	for broken and incomplete features.

	config LOCALVERSION
	string "Local version - append to U-Boot release"
	help
	Append an extra string to the end of your U-Boot version.
	This will show up in your boot log, for example.
	The string you set here will be appended after the contents of
	any files with a filename matching localversion* in your
	object and source tree, in that order. Your total string can
	be a maximum of 64 characters.

	config LOCALVERSION_AUTO
	bool "Automatically append version information to the version string"
	default y
	help
	This will try to automatically determine if the current tree is a
	release tree by looking for Git tags that belong to the current
	top of tree revision.

	A string of the format -gxxxxxxxx will be added to the localversion
	if a Git-based tree is found. The string generated by this will be
	appended after any matching localversion* files, and after the value
	set in CONFIG_LOCALVERSION.

	(The actual string used here is the first eight characters produced
	by running the command:

	$ git rev-parse --verify HEAD

	which is done within the script "scripts/setlocalversion".)

	config CC_OPTIMIZE_FOR_SIZE
	bool "Optimize for size"
	default y
	help
	Enabling this option will pass "-Os" instead of "-O2" to gcc
	resulting in a smaller U-Boot image.

	This option is enabled by default for U-Boot.

	config CC_COVERAGE
	bool "Enable code coverage analysis"
	depends on SANDBOX
	help
	Enabling this option will pass "--coverage" to gcc to compile
	and link code instrumented for coverage analysis.

	config DISTRO_DEFAULTS
	bool "Select defaults suitable for booting general purpose Linux distributions"
	select AUTO_COMPLETE
	select CMDLINE_EDITING
	select CMD_BOOTI if ARM64
	select CMD_BOOTZ if ARM && !ARM64
	select CMD_DHCP if CMD_NET
	select CMD_ENV_EXISTS
	select CMD_EXT2
	select CMD_EXT4
	select CMD_FAT
	select CMD_FS_GENERIC
	select CMD_PART if PARTITIONS
	select CMD_PING if CMD_NET
	select CMD_PXE if NET
	select ENV_VARS_UBOOT_CONFIG
	select HUSH_PARSER
	select SUPPORT_RAW_INITRD
	select SYS_LONGHELP
	imply CMD_MII if NET
	imply USE_BOOTCOMMAND
	help
	Select this to enable various options and commands which are suitable
	for building u-boot for booting general purpose Linux distributions.

	config ENV_VARS_UBOOT_CONFIG
	bool "Add arch, board, vendor and soc variables to default environment"
	help
	Define this in order to add variables describing the
	U-Boot build configuration to the default environment.
	These will be named arch, cpu, board, vendor, and soc.
	Enabling this option will cause the following to be defined:
	- CONFIG_SYS_ARCH
	- CONFIG_SYS_CPU
	- CONFIG_SYS_BOARD
	- CONFIG_SYS_VENDOR
	- CONFIG_SYS_SOC

	config SYS_BOOT_GET_CMDLINE
	bool "Enable kernel command line setup"
	help
	Enables allocating and saving kernel cmdline in space between
	"bootm_low" and "bootm_low" + BOOTMAPSZ.

	config SYS_BOOT_GET_KBD
	bool "Enable kernel board information setup"
	help
	Enables allocating and saving a kernel copy of the bd_info in
	space between "bootm_low" and "bootm_low" + BOOTMAPSZ.

	config SYS_MALLOC_F
	bool "Enable malloc() pool before relocation"
	default y if DM
	help
	Before relocation, memory is very limited on many platforms. Still,
	we can provide a small malloc() pool if needed. Driver model in
	particular needs this to operate, so that it can allocate the
	initial serial device and any others that are needed.

	config SYS_MALLOC_F_LEN
	hex "Size of malloc() pool before relocation"
	depends on SYS_MALLOC_F
	default 0x1000 if AM33XX
	default 0x400
	help
	Before relocation, memory is very limited on many platforms. Still,
	we can provide a small malloc() pool if needed. Driver model in
	particular needs this to operate, so that it can allocate the
	initial serial device and any others that are needed.

	config SPL_SYS_MALLOC_F_LEN
	hex "Size of malloc() pool in SPL before relocation"
	depends on SYS_MALLOC_F
	default SYS_MALLOC_F_LEN
	help
	Before relocation, memory is very limited on many platforms. Still,
	we can provide a small malloc() pool if needed. Driver model in
	particular needs this to operate, so that it can allocate the
	initial serial device and any others that are needed.

	config TPL_SYS_MALLOC_F_LEN
	hex "Size of malloc() pool in TPL before relocation"
	depends on SYS_MALLOC_F
	default SYS_MALLOC_F_LEN
	help
	Before relocation, memory is very limited on many platforms. Still,
	we can provide a small malloc() pool if needed. Driver model in
	particular needs this to operate, so that it can allocate the
	initial serial device and any others that are needed.

	menuconfig EXPERT
	bool "Configure standard U-Boot features (expert users)"
	default y
	help
	This option allows certain base U-Boot options and settings
	to be disabled or tweaked. This is for specialized
	environments which can tolerate a "non-standard" U-Boot.
	Use this only if you really know what you are doing.

	if EXPERT
	config SYS_MALLOC_CLEAR_ON_INIT
	bool "Init with zeros the memory reserved for malloc (slow)"
	default y
	help
	This setting is enabled by default. The reserved malloc
	memory is initialized with zeros, so first malloc calls
	will return the pointer to the zeroed memory. But this
	slows the boot time.

	It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
	value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
	Then the boot time can be significantly reduced.
	Warning:
	When disabling this, please check if malloc calls, maybe
	should be replaced by calloc - if one expects zeroed memory.

	config TOOLS_DEBUG
	bool "Enable debug information for tools"
	help
	Enable generation of debug information for tools such as mkimage.
	This can be used for debugging purposes. With debug information
	it is possible to set breakpoints on particular lines, single-step
	debug through the source code, etc.

	endif # EXPERT

	config PHYS_64BIT
	bool "64bit physical address support"
	help
	Say Y here to support 64bit physical memory address.
	This can be used not only for 64bit SoCs, but also for
	large physical address extention on 32bit SoCs.

	config BUILD_ROM
	bool "Build U-Boot as BIOS replacement"
	depends on X86
	help
	This option allows to build a ROM version of U-Boot.
	The build process generally requires several binary blobs
	which are not shipped in the U-Boot source tree.
	Please, see doc/README.x86 for details.

	endmenu # General setup

	menu "Boot images"

	config ANDROID_BOOT_IMAGE
	bool "Enable support for Android Boot Images"
	default y if FASTBOOT
	help
	This enables support for booting images which use the Android
	image format header.

	config FIT
	bool "Support Flattened Image Tree"
	select MD5
	select SHA1
	help
	This option allows you to boot the new uImage structure,
	Flattened Image Tree. FIT is formally a FDT, which can include
	images of various types (kernel, FDT blob, ramdisk, etc.)
	in a single blob. To boot this new uImage structure,
	pass the address of the blob to the "bootm" command.
	FIT is very flexible, supporting compression, multiple images,
	multiple configurations, verification through hashing and also
	verified boot (secure boot using RSA).

	if FIT

	config FIT_ENABLE_SHA256_SUPPORT
	bool "Support SHA256 checksum of FIT image contents"
	default y
	select SHA256
	help
	Enable this to support SHA256 checksum of FIT image contents. A
	SHA256 checksum is a 256-bit (32-byte) hash value used to check that
	the image contents have not been corrupted. SHA256 is recommended
	for use in secure applications since (as at 2016) there is no known
	feasible attack that could produce a 'collision' with differing
	input data. Use this for the highest security. Note that only the
	SHA256 variant is supported: SHA512 and others are not currently
	supported in U-Boot.

	config FIT_SIGNATURE
	bool "Enable signature verification of FIT uImages"
	depends on DM
	select HASH
	select RSA
	help
	This option enables signature verification of FIT uImages,
	using a hash signed and verified using RSA. If
	CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
	hashing is available using hardware, then the RSA library will use
	it. See doc/uImage.FIT/signature.txt for more details.

	WARNING: When relying on signed FIT images with a required signature
	check the legacy image format is disabled by default, so that
	unsigned images cannot be loaded. If a board needs the legacy image
	format support in this case, enable it using
	CONFIG_IMAGE_FORMAT_LEGACY.

	config FIT_SIGNATURE_MAX_SIZE
	hex "Max size of signed FIT structures"
	depends on FIT_SIGNATURE
	default 0x10000000
	help
	This option sets a max size in bytes for verified FIT uImages.
	A sane value of 256MB protects corrupted DTB structures from overlapping
	device memory. Assure this size does not extend past expected storage
	space.

	config FIT_VERBOSE
	bool "Show verbose messages when FIT images fail"
	help
	Generally a system will have valid FIT images so debug messages
	are a waste of code space. If you are debugging your images then
	you can enable this option to get more verbose information about
	failures.

	config FIT_BEST_MATCH
	bool "Select the best match for the kernel device tree"
	help
	When no configuration is explicitly selected, default to the
	one whose fdt's compatibility field best matches that of
	U-Boot itself. A match is considered "best" if it matches the
	most specific compatibility entry of U-Boot's fdt's root node.
	The order of entries in the configuration's fdt is ignored.

	config FIT_IMAGE_POST_PROCESS
	bool "Enable post-processing of FIT artifacts after loading by U-Boot"
	depends on TI_SECURE_DEVICE
	help
	Allows doing any sort of manipulation to blobs after they got extracted
	from FIT images like stripping off headers or modifying the size of the
	blob, verification, authentication, decryption etc. in a platform or
	board specific way. In order to use this feature a platform or board-
	specific implementation of board_fit_image_post_process() must be
	provided. Also, anything done during this post-processing step would
	need to be comprehended in how the images were prepared before being
	injected into the FIT creation (i.e. the blobs would have been pre-
	processed before being added to the FIT image).

	if SPL

	config SPL_FIT
	bool "Support Flattened Image Tree within SPL"
	depends on SPL
	select SPL_OF_LIBFDT

	config SPL_FIT_PRINT
	bool "Support FIT printing within SPL"
	depends on SPL_FIT
	help
	Support printing the content of the fitImage in a verbose manner in SPL.

	config SPL_FIT_SIGNATURE
	bool "Enable signature verification of FIT firmware within SPL"
	depends on SPL_DM
	select SPL_FIT
	select SPL_RSA

	config SPL_LOAD_FIT
	bool "Enable SPL loading U-Boot as a FIT"
	select SPL_FIT
	help
	Normally with the SPL framework a legacy image is generated as part
	of the build. This contains U-Boot along with information as to
	where it should be loaded. This option instead enables generation
	of a FIT (Flat Image Tree) which provides more flexibility. In
	particular it can handle selecting from multiple device tree
	and passing the correct one to U-Boot.

	config SPL_LOAD_FIT_FULL
	bool "Enable SPL loading U-Boot as a FIT"
	select SPL_FIT
	help
	Normally with the SPL framework a legacy image is generated as part
	of the build. This contains U-Boot along with information as to
	where it should be loaded. This option instead enables generation
	of a FIT (Flat Image Tree) which provides more flexibility. In
	particular it can handle selecting from multiple device tree
	and passing the correct one to U-Boot.

	config SPL_FIT_IMAGE_POST_PROCESS
	bool "Enable post-processing of FIT artifacts after loading by the SPL"
	depends on SPL_LOAD_FIT
	help
	Allows doing any sort of manipulation to blobs after they got extracted
	from the U-Boot FIT image like stripping off headers or modifying the
	size of the blob, verification, authentication, decryption etc. in a
	platform or board specific way. In order to use this feature a platform
	or board-specific implementation of board_fit_image_post_process() must
	be provided. Also, anything done during this post-processing step would
	need to be comprehended in how the images were prepared before being
	injected into the FIT creation (i.e. the blobs would have been pre-
	processed before being added to the FIT image).

	config SPL_FIT_SOURCE
	string ".its source file for U-Boot FIT image"
	depends on SPL_FIT
	help
	Specifies a (platform specific) FIT source file to generate the
	U-Boot FIT image. This could specify further image to load and/or
	execute.

	config SPL_FIT_GENERATOR
	string ".its file generator script for U-Boot FIT image"
	depends on SPL_FIT
	default "board/sunxi/mksunxi_fit_atf.sh" if SPL_LOAD_FIT && ARCH_SUNXI
	help
	Specifies a (platform specific) script file to generate the FIT
	source file used to build the U-Boot FIT image file. This gets
	passed a list of supported device tree file stub names to
	include in the generated image.

	endif # SPL

	endif # FIT

	config IMAGE_FORMAT_LEGACY
	bool "Enable support for the legacy image format"
	default y if !FIT_SIGNATURE
	help
	This option enables the legacy image format. It is enabled by
	default for backward compatibility, unless FIT_SIGNATURE is
	set where it is disabled so that unsigned images cannot be
	loaded. If a board needs the legacy image format support in this
	case, enable it here.

	config OF_BOARD_SETUP
	bool "Set up board-specific details in device tree before boot"
	depends on OF_LIBFDT
	help
	This causes U-Boot to call ft_board_setup() before booting into
	the Operating System. This function can set up various
	board-specific information in the device tree for use by the OS.
	The device tree is then passed to the OS.

	config OF_SYSTEM_SETUP
	bool "Set up system-specific details in device tree before boot"
	depends on OF_LIBFDT
	help
	This causes U-Boot to call ft_system_setup() before booting into
	the Operating System. This function can set up various
	system-specific information in the device tree for use by the OS.
	The device tree is then passed to the OS.

	config OF_STDOUT_VIA_ALIAS
	bool "Update the device-tree stdout alias from U-Boot"
	depends on OF_LIBFDT
	help
	This uses U-Boot's serial alias from the aliases node to update
	the device tree passed to the OS. The "linux,stdout-path" property
	in the chosen node is set to point to the correct serial node.
	This option currently references CONFIG_CONS_INDEX, which is
	incorrect when used with device tree as this option does not
	exist / should not be used.

	config SYS_EXTRA_OPTIONS
	string "Extra Options (DEPRECATED)"
	help
	The old configuration infrastructure (= mkconfig + boards.cfg)
	provided the extra options field. If you have something like
	"HAS_BAR,BAZ=64", the optional options
	#define CONFIG_HAS
	#define CONFIG_BAZ 64
	will be defined in include/config.h.
	This option was prepared for the smooth migration from the old
	configuration to Kconfig. Since this option will be removed sometime,
	new boards should not use this option.

	config SYS_TEXT_BASE
	depends on !NIOS2 && !XTENSA
	depends on !EFI_APP
	default 0x80800000 if ARCH_OMAP2PLUS
	default 0x4a000000 if ARCH_SUNXI && !MACH_SUN9I && !MACH_SUN8I_V3S
	default 0x2a000000 if ARCH_SUNXI && MACH_SUN9I
	default 0x42e00000 if ARCH_SUNXI && MACH_SUN8I_V3S
	hex "Text Base"
	help
	The address in memory that U-Boot will be running from, initially.



	config SYS_CLK_FREQ
	depends on ARC \|\| ARCH_SUNXI
	int "CPU clock frequency"
	help
	TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture

	config ARCH_FIXUP_FDT_MEMORY
	bool "Enable arch_fixup_memory_banks() call"
	default y
	help
	Enable FDT memory map syncup before OS boot. This feature can be
	used for booting OS with different memory setup where the part of
	the memory location should be used for different purpose.

	endmenu # Boot images

	source "api/Kconfig"

	source "common/Kconfig"

	source "cmd/Kconfig"

	source "disk/Kconfig"

	source "dts/Kconfig"

	source "env/Kconfig"

	source "net/Kconfig"

	source "drivers/Kconfig"

	source "fs/Kconfig"

	source "lib/Kconfig"

	source "test/Kconfig"