Kconfig

   1 #
   2 # For a description of the syntax of this configuration file,
   3 # see the file Documentation/kbuild/kconfig-language.txt in the
   4 # Linux kernel source tree.
   5 #
   6 mainmenu "U-Boot $UBOOTVERSION Configuration"
   7
   8 config UBOOTVERSION
   9         string
  10         option env="UBOOTVERSION"
  11
  12 # Allow defaults in arch-specific code to override any given here
  13 source "arch/Kconfig"
  14
  15 menu "General setup"
  16
  17 config BROKEN
  18         bool
  19         help
  20           This option cannot be enabled. It is used as dependency
  21           for broken and incomplete features.
  22
  23 config LOCALVERSION
  24         string "Local version - append to U-Boot release"
  25         help
  26           Append an extra string to the end of your U-Boot version.
  27           This will show up in your boot log, for example.
  28           The string you set here will be appended after the contents of
  29           any files with a filename matching localversion* in your
  30           object and source tree, in that order.  Your total string can
  31           be a maximum of 64 characters.
  32
  33 config LOCALVERSION_AUTO
  34         bool "Automatically append version information to the version string"
  35         default y
  36         help
  37           This will try to automatically determine if the current tree is a
  38           release tree by looking for Git tags that belong to the current
  39           top of tree revision.
  40
  41           A string of the format -gxxxxxxxx will be added to the localversion
  42           if a Git-based tree is found.  The string generated by this will be
  43           appended after any matching localversion* files, and after the value
  44           set in CONFIG_LOCALVERSION.
  45
  46           (The actual string used here is the first eight characters produced
  47           by running the command:
  48
  49             $ git rev-parse --verify HEAD
  50
  51           which is done within the script "scripts/setlocalversion".)
  52
  53 config CC_OPTIMIZE_FOR_SIZE
  54         bool "Optimize for size"
  55         default y
  56         help
  57           Enabling this option will pass "-Os" instead of "-O2" to gcc
  58           resulting in a smaller U-Boot image.
  59
  60           This option is enabled by default for U-Boot.
  61
  62 config CC_COVERAGE
  63         bool "Enable code coverage analysis"
  64         depends on SANDBOX
  65         help
  66           Enabling this option will pass "--coverage" to gcc to compile
  67           and link code instrumented for coverage analysis.
  68
  69 config DISTRO_DEFAULTS
  70         bool "Select defaults suitable for booting general purpose Linux distributions"
  71         default y if ARCH_SUNXI || TEGRA
  72         default y if ARCH_LS2080A
  73         default y if ARCH_MESON
  74         default y if ARCH_ROCKCHIP
  75         default n
  76         imply USE_BOOTCOMMAND
  77         select CMD_BOOTZ if ARM && !ARM64
  78         select CMD_BOOTI if ARM64
  79         select CMD_DHCP if CMD_NET
  80         select CMD_PING if CMD_NET
  81         select CMD_PXE if NET
  82         select CMD_EXT2
  83         select CMD_EXT4
  84         select CMD_FAT
  85         select CMD_FS_GENERIC
  86         imply CMD_MII if NET
  87         select CMD_PART if PARTITIONS
  88         select HUSH_PARSER
  89         select CMDLINE_EDITING
  90         select AUTO_COMPLETE
  91         select SYS_LONGHELP
  92         select SUPPORT_RAW_INITRD
  93         select ENV_VARS_UBOOT_CONFIG
  94         help
  95           Select this to enable various options and commands which are suitable
  96           for building u-boot for booting general purpose Linux distributions.
  97
  98 config ENV_VARS_UBOOT_CONFIG
  99         bool "Add arch, board, vendor and soc variables to default environment"
 100         help
 101           Define this in order to add variables describing the
 102           U-Boot build configuration to the default environment.
 103           These will be named arch, cpu, board, vendor, and soc.
 104           Enabling this option will cause the following to be defined:
 105           - CONFIG_SYS_ARCH
 106           - CONFIG_SYS_CPU
 107           - CONFIG_SYS_BOARD
 108           - CONFIG_SYS_VENDOR
 109           - CONFIG_SYS_SOC
 110
 111 config SYS_BOOT_GET_CMDLINE
 112         bool "Enable kernel command line setup"
 113         help
 114           Enables allocating and saving kernel cmdline in space between
 115           "bootm_low" and "bootm_low" + BOOTMAPSZ.
 116
 117 config SYS_BOOT_GET_KBD
 118         bool "Enable kernel board information setup"
 119         help
 120           Enables allocating and saving a kernel copy of the bd_info in
 121           space between "bootm_low" and "bootm_low" + BOOTMAPSZ.
 122
 123 config SYS_MALLOC_F
 124         bool "Enable malloc() pool before relocation"
 125         default y if DM
 126         help
 127           Before relocation, memory is very limited on many platforms. Still,
 128           we can provide a small malloc() pool if needed. Driver model in
 129           particular needs this to operate, so that it can allocate the
 130           initial serial device and any others that are needed.
 131
 132 config SYS_MALLOC_F_LEN
 133         hex "Size of malloc() pool before relocation"
 134         depends on SYS_MALLOC_F
 135         default 0x400
 136         help
 137           Before relocation, memory is very limited on many platforms. Still,
 138           we can provide a small malloc() pool if needed. Driver model in
 139           particular needs this to operate, so that it can allocate the
 140           initial serial device and any others that are needed.
 141
 142 config SPL_SYS_MALLOC_F_LEN
 143         hex "Size of malloc() pool in SPL before relocation"
 144         depends on SYS_MALLOC_F
 145         default SYS_MALLOC_F_LEN
 146         help
 147           Before relocation, memory is very limited on many platforms. Still,
 148           we can provide a small malloc() pool if needed. Driver model in
 149           particular needs this to operate, so that it can allocate the
 150           initial serial device and any others that are needed.
 151
 152 config TPL_SYS_MALLOC_F_LEN
 153         hex "Size of malloc() pool in TPL before relocation"
 154         depends on SYS_MALLOC_F
 155         default SYS_MALLOC_F_LEN
 156         help
 157           Before relocation, memory is very limited on many platforms. Still,
 158           we can provide a small malloc() pool if needed. Driver model in
 159           particular needs this to operate, so that it can allocate the
 160           initial serial device and any others that are needed.
 161
 162 menuconfig EXPERT
 163         bool "Configure standard U-Boot features (expert users)"
 164         default y
 165         help
 166           This option allows certain base U-Boot options and settings
 167           to be disabled or tweaked. This is for specialized
 168           environments which can tolerate a "non-standard" U-Boot.
 169           Use this only if you really know what you are doing.
 170
 171 if EXPERT
 172         config SYS_MALLOC_CLEAR_ON_INIT
 173         bool "Init with zeros the memory reserved for malloc (slow)"
 174         default y
 175         help
 176           This setting is enabled by default. The reserved malloc
 177           memory is initialized with zeros, so first malloc calls
 178           will return the pointer to the zeroed memory. But this
 179           slows the boot time.
 180
 181           It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
 182           value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
 183           Then the boot time can be significantly reduced.
 184           Warning:
 185           When disabling this, please check if malloc calls, maybe
 186           should be replaced by calloc - if one expects zeroed memory.
 187
 188 config TOOLS_DEBUG
 189         bool "Enable debug information for tools"
 190         help
 191           Enable generation of debug information for tools such as mkimage.
 192           This can be used for debugging purposes. With debug information
 193           it is possible to set breakpoints on particular lines, single-step
 194           debug through the source code, etc.
 195
 196 endif # EXPERT
 197
 198 config PHYS_64BIT
 199         bool "64bit physical address support"
 200         help
 201           Say Y here to support 64bit physical memory address.
 202           This can be used not only for 64bit SoCs, but also for
 203           large physical address extention on 32bit SoCs.
 204
 205 config BUILD_ROM
 206         bool "Build U-Boot as BIOS replacement"
 207         depends on X86
 208         help
 209           This option allows to build a ROM version of U-Boot.
 210           The build process generally requires several binary blobs
 211           which are not shipped in the U-Boot source tree.
 212           Please, see doc/README.x86 for details.
 213
 214 endmenu         # General setup
 215
 216 menu "Boot images"
 217
 218 config ANDROID_BOOT_IMAGE
 219         bool "Enable support for Android Boot Images"
 220         default y if FASTBOOT
 221         help
 222           This enables support for booting images which use the Android
 223           image format header.
 224
 225 config FIT
 226         bool "Support Flattened Image Tree"
 227         select MD5
 228         select SHA1
 229         help
 230           This option allows you to boot the new uImage structure,
 231           Flattened Image Tree.  FIT is formally a FDT, which can include
 232           images of various types (kernel, FDT blob, ramdisk, etc.)
 233           in a single blob.  To boot this new uImage structure,
 234           pass the address of the blob to the "bootm" command.
 235           FIT is very flexible, supporting compression, multiple images,
 236           multiple configurations, verification through hashing and also
 237           verified boot (secure boot using RSA).
 238
 239 if FIT
 240
 241 config FIT_ENABLE_SHA256_SUPPORT
 242         bool "Support SHA256 checksum of FIT image contents"
 243         select SHA256
 244         default y
 245         help
 246           Enable this to support SHA256 checksum of FIT image contents. A
 247           SHA256 checksum is a 256-bit (32-byte) hash value used to check that
 248           the image contents have not been corrupted. SHA256 is recommended
 249           for use in secure applications since (as at 2016) there is no known
 250           feasible attack that could produce a 'collision' with differing
 251           input data. Use this for the highest security. Note that only the
 252           SHA256 variant is supported: SHA512 and others are not currently
 253           supported in U-Boot.
 254
 255 config FIT_SIGNATURE
 256         bool "Enable signature verification of FIT uImages"
 257         depends on DM
 258         select RSA
 259         help
 260           This option enables signature verification of FIT uImages,
 261           using a hash signed and verified using RSA. If
 262           CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
 263           hashing is available using hardware, then the RSA library will use
 264           it. See doc/uImage.FIT/signature.txt for more details.
 265
 266           WARNING: When relying on signed FIT images with a required signature
 267           check the legacy image format is disabled by default, so that
 268           unsigned images cannot be loaded. If a board needs the legacy image
 269           format support in this case, enable it using
 270           CONFIG_IMAGE_FORMAT_LEGACY.
 271
 272 config FIT_VERBOSE
 273         bool "Show verbose messages when FIT images fail"
 274         help
 275           Generally a system will have valid FIT images so debug messages
 276           are a waste of code space. If you are debugging your images then
 277           you can enable this option to get more verbose information about
 278           failures.
 279
 280 config FIT_BEST_MATCH
 281         bool "Select the best match for the kernel device tree"
 282         help
 283           When no configuration is explicitly selected, default to the
 284           one whose fdt's compatibility field best matches that of
 285           U-Boot itself. A match is considered "best" if it matches the
 286           most specific compatibility entry of U-Boot's fdt's root node.
 287           The order of entries in the configuration's fdt is ignored.
 288
 289 config FIT_IMAGE_POST_PROCESS
 290         bool "Enable post-processing of FIT artifacts after loading by U-Boot"
 291         depends on TI_SECURE_DEVICE
 292         help
 293           Allows doing any sort of manipulation to blobs after they got extracted
 294           from FIT images like stripping off headers or modifying the size of the
 295           blob, verification, authentication, decryption etc. in a platform or
 296           board specific way. In order to use this feature a platform or board-
 297           specific implementation of board_fit_image_post_process() must be
 298           provided. Also, anything done during this post-processing step would
 299           need to be comprehended in how the images were prepared before being
 300           injected into the FIT creation (i.e. the blobs would have been pre-
 301           processed before being added to the FIT image).
 302
 303 if SPL
 304
 305 config SPL_FIT
 306         bool "Support Flattened Image Tree within SPL"
 307         depends on SPL
 308         select SPL_OF_LIBFDT
 309
 310 config SPL_FIT_SIGNATURE
 311         bool "Enable signature verification of FIT firmware within SPL"
 312         depends on SPL_DM
 313         select SPL_FIT
 314         select SPL_RSA
 315
 316 config SPL_LOAD_FIT
 317         bool "Enable SPL loading U-Boot as a FIT"
 318         select SPL_FIT
 319         help
 320           Normally with the SPL framework a legacy image is generated as part
 321           of the build. This contains U-Boot along with information as to
 322           where it should be loaded. This option instead enables generation
 323           of a FIT (Flat Image Tree) which provides more flexibility. In
 324           particular it can handle selecting from multiple device tree
 325           and passing the correct one to U-Boot.
 326
 327 config SPL_FIT_IMAGE_POST_PROCESS
 328         bool "Enable post-processing of FIT artifacts after loading by the SPL"
 329         depends on SPL_LOAD_FIT
 330         help
 331           Allows doing any sort of manipulation to blobs after they got extracted
 332           from the U-Boot FIT image like stripping off headers or modifying the
 333           size of the blob, verification, authentication, decryption etc. in a
 334           platform or board specific way. In order to use this feature a platform
 335           or board-specific implementation of board_fit_image_post_process() must
 336           be provided. Also, anything done during this post-processing step would
 337           need to be comprehended in how the images were prepared before being
 338           injected into the FIT creation (i.e. the blobs would have been pre-
 339           processed before being added to the FIT image).
 340
 341 config SPL_FIT_SOURCE
 342         string ".its source file for U-Boot FIT image"
 343         depends on SPL_FIT
 344         help
 345           Specifies a (platform specific) FIT source file to generate the
 346           U-Boot FIT image. This could specify further image to load and/or
 347           execute.
 348
 349 config SPL_FIT_GENERATOR
 350         string ".its file generator script for U-Boot FIT image"
 351         depends on SPL_FIT
 352         default "board/sunxi/mksunxi_fit_atf.sh" if SPL_LOAD_FIT && ARCH_SUNXI
 353         help
 354           Specifies a (platform specific) script file to generate the FIT
 355           source file used to build the U-Boot FIT image file. This gets
 356           passed a list of supported device tree file stub names to
 357           include in the generated image.
 358
 359 endif # SPL
 360
 361 endif # FIT
 362
 363 config OF_BOARD_SETUP
 364         bool "Set up board-specific details in device tree before boot"
 365         depends on OF_LIBFDT
 366         help
 367           This causes U-Boot to call ft_board_setup() before booting into
 368           the Operating System. This function can set up various
 369           board-specific information in the device tree for use by the OS.
 370           The device tree is then passed to the OS.
 371
 372 config OF_SYSTEM_SETUP
 373         bool "Set up system-specific details in device tree before boot"
 374         depends on OF_LIBFDT
 375         help
 376           This causes U-Boot to call ft_system_setup() before booting into
 377           the Operating System. This function can set up various
 378           system-specific information in the device tree for use by the OS.
 379           The device tree is then passed to the OS.
 380
 381 config OF_STDOUT_VIA_ALIAS
 382         bool "Update the device-tree stdout alias from U-Boot"
 383         depends on OF_LIBFDT
 384         help
 385           This uses U-Boot's serial alias from the aliases node to update
 386           the device tree passed to the OS. The "linux,stdout-path" property
 387           in the chosen node is set to point to the correct serial node.
 388           This option currently references CONFIG_CONS_INDEX, which is
 389           incorrect when used with device tree as this option does not
 390           exist / should not be used.
 391
 392 config SYS_EXTRA_OPTIONS
 393         string "Extra Options (DEPRECATED)"
 394         help
 395           The old configuration infrastructure (= mkconfig + boards.cfg)
 396           provided the extra options field. If you have something like
 397           "HAS_BAR,BAZ=64", the optional options
 398             #define CONFIG_HAS
 399             #define CONFIG_BAZ  64
 400           will be defined in include/config.h.
 401           This option was prepared for the smooth migration from the old
 402           configuration to Kconfig. Since this option will be removed sometime,
 403           new boards should not use this option.
 404
 405 config SYS_TEXT_BASE
 406         depends on !NIOS2 && !XTENSA
 407         depends on !EFI_APP
 408         default 0x80800000 if ARCH_OMAP2PLUS
 409         default 0x4a000000 if ARCH_SUNXI && !MACH_SUN9I && !MACH_SUN8I_V3S
 410         default 0x2a000000 if ARCH_SUNXI && MACH_SUN9I
 411         default 0x42e00000 if ARCH_SUNXI && MACH_SUN8I_V3S
 412         hex "Text Base"
 413         help
 414           The address in memory that U-Boot will be running from, initially.
 415
 416
 417
 418 config SYS_CLK_FREQ
 419         depends on ARC || ARCH_SUNXI
 420         int "CPU clock frequency"
 421         help
 422           TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
 423
 424 config ARCH_FIXUP_FDT_MEMORY
 425         bool "Enable arch_fixup_memory_banks() call"
 426         default y
 427         help
 428           Enable FDT memory map syncup before OS boot. This feature can be
 429           used for booting OS with different memory setup where the part of
 430           the memory location should be used for different purpose.
 431
 432 endmenu         # Boot images
 433
 434 source "api/Kconfig"
 435
 436 source "common/Kconfig"
 437
 438 source "cmd/Kconfig"
 439
 440 source "disk/Kconfig"
 441
 442 source "dts/Kconfig"
 443
 444 source "env/Kconfig"
 445
 446 source "net/Kconfig"
 447
 448 source "drivers/Kconfig"
 449
 450 source "fs/Kconfig"
 451
 452 source "lib/Kconfig"
 453
 454 source "test/Kconfig"