u-boot/common/Kconfig.boot

menu "Boot options"

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_EXTERNAL_OFFSET
	hex "FIT external data offset"
	default 0x0
	help
	  This specifies a data offset in fit image.
	  The offset is from data payload offset to the beginning of
	  fit image header. When specifies a offset, specific data
	  could be put in the hole between data payload and fit image
	  header, such as CSF data on i.MX platform.

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.

config FIT_ENABLE_SHA384_SUPPORT
	bool "Support SHA384 checksum of FIT image contents"
	default n
	select SHA384
	help
	  Enable this to support SHA384 checksum of FIT image contents. A
	  SHA384 checksum is a 384-bit (48-byte) hash value used to check that
	  the image contents have not been corrupted. Use this for the highest
	  security.

config FIT_ENABLE_SHA512_SUPPORT
	bool "Support SHA512 checksum of FIT image contents"
	default n
	select SHA512
	help
	  Enable this to support SHA512 checksum of FIT image contents. A
	  SHA512 checksum is a 512-bit (64-byte) hash value used to check that
	  the image contents have not been corrupted.

config FIT_SIGNATURE
	bool "Enable signature verification of FIT uImages"
	depends on DM
	select HASH
	select RSA
	select RSA_VERIFY
	select IMAGE_SIGN_INFO
	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_LEGACY_IMAGE_FORMAT.

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_ENABLE_RSASSA_PSS_SUPPORT
	bool "Support rsassa-pss signature scheme of FIT image contents"
	depends on FIT_SIGNATURE
	default n
	help
	  Enable this to support the pss padding algorithm as described
	  in the rfc8017 (https://tools.ietf.org/html/rfc8017).

config FIT_CIPHER
	bool "Enable ciphering data in a FIT uImages"
	depends on DM
	select AES
	help
	  Enable the feature of data ciphering/unciphering in the tool mkimage
	  and in the u-boot support of the FIT image.

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_CRYPTO_SUPPORT
	select SPL_HASH_SUPPORT
	select SPL_RSA
	select SPL_RSA_VERIFY
	select SPL_IMAGE_SIGN_INFO

config SPL_LOAD_FIT
	bool "Enable SPL loading U-Boot as a FIT (basic fitImage features)"
	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_ADDRESS
	hex "load address of fit image"
	depends on SPL_LOAD_FIT
	default 0x0
	help
	  Specify the load address of the fit image that will be loaded
	  by SPL.

config SPL_LOAD_FIT_APPLY_OVERLAY
	bool "Enable SPL applying DT overlays from FIT"
	depends on SPL_LOAD_FIT
	select OF_LIBFDT_OVERLAY
	help
	  The device tree is loaded from the FIT image. Allow the SPL is to
	  also load device-tree overlays from the FIT image an apply them
	  over the device tree.

config SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ
	depends on SPL_LOAD_FIT_APPLY_OVERLAY
	default 0x10000
	hex "size of temporary buffer used to load the overlays"
	help
	  The size of the area where the overlays will be loaded and
	  uncompress. Must be at least as large as biggest overlay
	  (uncompressed)

config SPL_LOAD_FIT_FULL
	bool "Enable SPL loading U-Boot as a FIT (full fitImage features)"
	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 USE_SPL_FIT_GENERATOR
	bool "Use a script to generate the .its script"
	default y if SPL_FIT && !ARCH_SUNXI

config SPL_FIT_GENERATOR
	string ".its file generator script for U-Boot FIT image"
	depends on USE_SPL_FIT_GENERATOR
	default "arch/arm/mach-rockchip/make_fit_atf.py" if SPL_LOAD_FIT && ARCH_ROCKCHIP
	default "arch/arm/mach-zynqmp/mkimage_fit_atf.sh" if SPL_LOAD_FIT && ARCH_ZYNQMP
	default "arch/riscv/lib/mkimage_fit_opensbi.sh" if SPL_LOAD_FIT && RISCV
	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 LEGACY_IMAGE_FORMAT
	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 HAVE_SYS_TEXT_BASE
	bool
	depends on !NIOS2 && !XTENSA
	depends on !EFI_APP
	default y

config SYS_TEXT_BASE
	depends on HAVE_SYS_TEXT_BASE
	default 0x80800000 if ARCH_OMAP2PLUS || ARCH_K3
	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 || MPC83xx
	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

endmenu		# Booting