Merge git://git.denx.de/u-boot-usb

[u-boot] / 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 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
        select CMD_PXE if NET
        select CMD_EXT2
        select CMD_EXT4
        select CMD_FAT
        select CMD_FS_GENERIC
        select CMD_MII if NET
        select CMD_PING if NET
        select CMD_PART if PARTITIONS
        select HUSH_PARSER
        help
          Select this to enable various options and commands which are suitable
          for building u-boot for booting general purpose Linux distributions.

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"