#
  # 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 XEN
  	bool "Select U-Boot be run as a bootloader for XEN Virtual Machine"
  	default n
  	help
  	  Enabling this option will make U-Boot be run as a bootloader
  	  for XEN Virtual Machine.

  config DISTRO_DEFAULTS
  	bool "Select defaults suitable for booting general purpose Linux distributions"

  	default y if ARCH_SUNXI || TEGRA

  	default y if ARCH_LS2080A

  	default y if ARCH_MESON

  	default y if ARCH_ROCKCHIP

  	default n

  	imply USE_BOOTCOMMAND

  	select CMD_BOOTZ if ARM && !ARM64

  	select CMD_BOOTI if ARM64

  	select CMD_DHCP if NET && CMD_NET
  	select CMD_PXE if NET && CMD_NET

  	select CMD_EXT2
  	select CMD_EXT4
  	select CMD_FAT
  	select CMD_FS_GENERIC

  	imply CMD_MII if NET

  	select CMD_PING if NET

  	select CMD_PART if PARTITIONS

  	select HUSH_PARSER

  	select BOOTP_BOOTPATH if NET && CMD_NET
  	select BOOTP_DNS if NET && CMD_NET
  	select BOOTP_GATEWAY if NET && CMD_NET
  	select BOOTP_HOSTNAME if NET && CMD_NET
  	select BOOTP_PXE if NET && CMD_NET
  	select BOOTP_SUBNETMASK if NET && CMD_NET

  	select CMDLINE_EDITING
  	select AUTO_COMPLETE
  	select SYS_LONGHELP
  	select SUPPORT_RAW_INITRD
  	select ENV_VARS_UBOOT_CONFIG

  	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 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"

  	select SHA256

  	default y
  	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 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_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_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_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 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

  	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"