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         select AUTO_COMPLETE
  72         select CMDLINE_EDITING
  73         select CMD_BOOTI if ARM64
  74         select CMD_BOOTZ if ARM && !ARM64
  75         select CMD_DHCP if CMD_NET
  76         select CMD_ENV_EXISTS
  77         select CMD_EXT2
  78         select CMD_EXT4
  79         select CMD_FAT
  80         select CMD_FS_GENERIC
  81         select CMD_PART if PARTITIONS
  82         select CMD_PING if CMD_NET
  83         select CMD_PXE if NET
  84         select ENV_VARS_UBOOT_CONFIG
  85         select HUSH_PARSER
  86         select SUPPORT_RAW_INITRD
  87         select SYS_LONGHELP
  88         imply CMD_MII if NET
  89         imply USB_STORAGE
  90         imply USE_BOOTCOMMAND
  91         help
  92           Select this to enable various options and commands which are suitable
  93           for building u-boot for booting general purpose Linux distributions.
  94
  95 config ENV_VARS_UBOOT_CONFIG
  96         bool "Add arch, board, vendor and soc variables to default environment"
  97         help
  98           Define this in order to add variables describing the
  99           U-Boot build configuration to the default environment.
 100           These will be named arch, cpu, board, vendor, and soc.
 101           Enabling this option will cause the following to be defined:
 102           - CONFIG_SYS_ARCH
 103           - CONFIG_SYS_CPU
 104           - CONFIG_SYS_BOARD
 105           - CONFIG_SYS_VENDOR
 106           - CONFIG_SYS_SOC
 107
 108 config NR_DRAM_BANKS
 109         int "Number of DRAM banks"
 110         default 4
 111         help
 112           This defines the number of DRAM banks.
 113
 114 config SYS_BOOT_GET_CMDLINE
 115         bool "Enable kernel command line setup"
 116         help
 117           Enables allocating and saving kernel cmdline in space between
 118           "bootm_low" and "bootm_low" + BOOTMAPSZ.
 119
 120 config SYS_BOOT_GET_KBD
 121         bool "Enable kernel board information setup"
 122         help
 123           Enables allocating and saving a kernel copy of the bd_info in
 124           space between "bootm_low" and "bootm_low" + BOOTMAPSZ.
 125
 126 config SYS_MALLOC_F
 127         bool "Enable malloc() pool before relocation"
 128         default y if DM
 129
 130         help
 131           Before relocation, memory is very limited on many platforms. Still,
 132           we can provide a small malloc() pool if needed. Driver model in
 133           particular needs this to operate, so that it can allocate the
 134           initial serial device and any others that are needed.
 135
 136 config SYS_MALLOC_F_LEN
 137         hex "Size of malloc() pool before relocation"
 138         depends on SYS_MALLOC_F
 139         default 0x1000 if AM33XX
 140         default 0x2800 if SANDBOX
 141         default 0x400
 142         help
 143           Before relocation, memory is very limited on many platforms. Still,
 144           we can provide a small malloc() pool if needed. Driver model in
 145           particular needs this to operate, so that it can allocate the
 146           initial serial device and any others that are needed.
 147
 148 config SYS_MALLOC_LEN
 149         hex "Define memory for Dynamic allocation"
 150         depends on ARCH_ZYNQ || ARCH_VERSAL || ARCH_STM32MP
 151         help
 152           This defines memory to be allocated for Dynamic allocation
 153           TODO: Use for other architectures
 154
 155 config SPL_SYS_MALLOC_F_LEN
 156         hex "Size of malloc() pool in SPL before relocation"
 157         depends on SYS_MALLOC_F
 158         default 0x2800 if RCAR_GEN3
 159         default SYS_MALLOC_F_LEN
 160         help
 161           Before relocation, memory is very limited on many platforms. Still,
 162           we can provide a small malloc() pool if needed. Driver model in
 163           particular needs this to operate, so that it can allocate the
 164           initial serial device and any others that are needed.
 165
 166 config TPL_SYS_MALLOC_F_LEN
 167         hex "Size of malloc() pool in TPL before relocation"
 168         depends on SYS_MALLOC_F
 169         default SYS_MALLOC_F_LEN
 170         help
 171           Before relocation, memory is very limited on many platforms. Still,
 172           we can provide a small malloc() pool if needed. Driver model in
 173           particular needs this to operate, so that it can allocate the
 174           initial serial device and any others that are needed.
 175
 176 menuconfig EXPERT
 177         bool "Configure standard U-Boot features (expert users)"
 178         default y
 179         help
 180           This option allows certain base U-Boot options and settings
 181           to be disabled or tweaked. This is for specialized
 182           environments which can tolerate a "non-standard" U-Boot.
 183           Use this only if you really know what you are doing.
 184
 185 if EXPERT
 186         config SYS_MALLOC_CLEAR_ON_INIT
 187         bool "Init with zeros the memory reserved for malloc (slow)"
 188         default y
 189         help
 190           This setting is enabled by default. The reserved malloc
 191           memory is initialized with zeros, so first malloc calls
 192           will return the pointer to the zeroed memory. But this
 193           slows the boot time.
 194
 195           It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
 196           value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
 197           Then the boot time can be significantly reduced.
 198           Warning:
 199           When disabling this, please check if malloc calls, maybe
 200           should be replaced by calloc - if one expects zeroed memory.
 201
 202 config TOOLS_DEBUG
 203         bool "Enable debug information for tools"
 204         help
 205           Enable generation of debug information for tools such as mkimage.
 206           This can be used for debugging purposes. With debug information
 207           it is possible to set breakpoints on particular lines, single-step
 208           debug through the source code, etc.
 209
 210 endif # EXPERT
 211
 212 config PHYS_64BIT
 213         bool "64bit physical address support"
 214         help
 215           Say Y here to support 64bit physical memory address.
 216           This can be used not only for 64bit SoCs, but also for
 217           large physical address extension on 32bit SoCs.
 218
 219 config BUILD_ROM
 220         bool "Build U-Boot as BIOS replacement"
 221         depends on X86
 222         help
 223           This option allows to build a ROM version of U-Boot.
 224           The build process generally requires several binary blobs
 225           which are not shipped in the U-Boot source tree.
 226           Please, see doc/README.x86 for details.
 227
 228 config SPL_IMAGE
 229         string "SPL image used in the combined SPL+U-Boot image"
 230         default "spl/boot.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
 231         default "spl/u-boot-spl.bin"
 232         help
 233           Select the SPL build target that shall be generated by the SPL
 234           build process (default spl/u-boot-spl.bin). This image will be
 235           used to generate a combined image with SPL and main U-Boot
 236           proper as one single image.
 237
 238 config BUILD_TARGET
 239         string "Build target special images"
 240         default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_ARRIA10
 241         default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_GEN5
 242         default "u-boot-spl.kwb" if ARCH_MVEBU && SPL
 243         default "u-boot-elf.srec" if RCAR_GEN3
 244         default "u-boot.itb" if SPL_LOAD_FIT && ARCH_SUNXI
 245         default "u-boot.kwb" if KIRKWOOD
 246         default "u-boot-with-spl.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
 247         help
 248           Some SoCs need special image types (e.g. U-Boot binary
 249           with a special header) as build targets. By defining
 250           CONFIG_BUILD_TARGET in the SoC / board header, this
 251           special image will be automatically built upon calling
 252           make / buildman.
 253
 254 endmenu         # General setup
 255
 256 menu "Boot images"
 257
 258 config ANDROID_BOOT_IMAGE
 259         bool "Enable support for Android Boot Images"
 260         default y if FASTBOOT
 261         help
 262           This enables support for booting images which use the Android
 263           image format header.
 264
 265 config FIT
 266         bool "Support Flattened Image Tree"
 267         select MD5
 268         select SHA1
 269         help
 270           This option allows you to boot the new uImage structure,
 271           Flattened Image Tree.  FIT is formally a FDT, which can include
 272           images of various types (kernel, FDT blob, ramdisk, etc.)
 273           in a single blob.  To boot this new uImage structure,
 274           pass the address of the blob to the "bootm" command.
 275           FIT is very flexible, supporting compression, multiple images,
 276           multiple configurations, verification through hashing and also
 277           verified boot (secure boot using RSA).
 278
 279 if FIT
 280
 281 config FIT_EXTERNAL_OFFSET
 282         hex "FIT external data offset"
 283         default 0x0
 284         help
 285           This specifies a data offset in fit image.
 286           The offset is from data payload offset to the beginning of
 287           fit image header. When specifies a offset, specific data
 288           could be put in the hole between data payload and fit image
 289           header, such as CSF data on i.MX platform.
 290
 291 config FIT_ENABLE_SHA256_SUPPORT
 292         bool "Support SHA256 checksum of FIT image contents"
 293         default y
 294         select SHA256
 295         help
 296           Enable this to support SHA256 checksum of FIT image contents. A
 297           SHA256 checksum is a 256-bit (32-byte) hash value used to check that
 298           the image contents have not been corrupted. SHA256 is recommended
 299           for use in secure applications since (as at 2016) there is no known
 300           feasible attack that could produce a 'collision' with differing
 301           input data. Use this for the highest security. Note that only the
 302           SHA256 variant is supported: SHA512 and others are not currently
 303           supported in U-Boot.
 304
 305 config FIT_SIGNATURE
 306         bool "Enable signature verification of FIT uImages"
 307         depends on DM
 308         select HASH
 309         select RSA
 310         help
 311           This option enables signature verification of FIT uImages,
 312           using a hash signed and verified using RSA. If
 313           CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
 314           hashing is available using hardware, then the RSA library will use
 315           it. See doc/uImage.FIT/signature.txt for more details.
 316
 317           WARNING: When relying on signed FIT images with a required signature
 318           check the legacy image format is disabled by default, so that
 319           unsigned images cannot be loaded. If a board needs the legacy image
 320           format support in this case, enable it using
 321           CONFIG_IMAGE_FORMAT_LEGACY.
 322
 323 config FIT_SIGNATURE_MAX_SIZE
 324         hex "Max size of signed FIT structures"
 325         depends on FIT_SIGNATURE
 326         default 0x10000000
 327         help
 328           This option sets a max size in bytes for verified FIT uImages.
 329           A sane value of 256MB protects corrupted DTB structures from overlapping
 330           device memory. Assure this size does not extend past expected storage
 331           space.
 332
 333 config FIT_ENABLE_RSASSA_PSS_SUPPORT
 334         bool "Support rsassa-pss signature scheme of FIT image contents"
 335         depends on FIT_SIGNATURE
 336         default n
 337         help
 338           Enable this to support the pss padding algorithm as described
 339           in the rfc8017 (https://tools.ietf.org/html/rfc8017).
 340
 341 config FIT_VERBOSE
 342         bool "Show verbose messages when FIT images fail"
 343         help
 344           Generally a system will have valid FIT images so debug messages
 345           are a waste of code space. If you are debugging your images then
 346           you can enable this option to get more verbose information about
 347           failures.
 348
 349 config FIT_BEST_MATCH
 350         bool "Select the best match for the kernel device tree"
 351         help
 352           When no configuration is explicitly selected, default to the
 353           one whose fdt's compatibility field best matches that of
 354           U-Boot itself. A match is considered "best" if it matches the
 355           most specific compatibility entry of U-Boot's fdt's root node.
 356           The order of entries in the configuration's fdt is ignored.
 357
 358 config FIT_IMAGE_POST_PROCESS
 359         bool "Enable post-processing of FIT artifacts after loading by U-Boot"
 360         depends on TI_SECURE_DEVICE
 361         help
 362           Allows doing any sort of manipulation to blobs after they got extracted
 363           from FIT images like stripping off headers or modifying the size of the
 364           blob, verification, authentication, decryption etc. in a platform or
 365           board specific way. In order to use this feature a platform or board-
 366           specific implementation of board_fit_image_post_process() must be
 367           provided. Also, anything done during this post-processing step would
 368           need to be comprehended in how the images were prepared before being
 369           injected into the FIT creation (i.e. the blobs would have been pre-
 370           processed before being added to the FIT image).
 371
 372 if SPL
 373
 374 config SPL_FIT
 375         bool "Support Flattened Image Tree within SPL"
 376         depends on SPL
 377         select SPL_OF_LIBFDT
 378
 379 config SPL_FIT_PRINT
 380         bool "Support FIT printing within SPL"
 381         depends on SPL_FIT
 382         help
 383           Support printing the content of the fitImage in a verbose manner in SPL.
 384
 385 config SPL_FIT_SIGNATURE
 386         bool "Enable signature verification of FIT firmware within SPL"
 387         depends on SPL_DM
 388         select SPL_FIT
 389         select SPL_RSA
 390
 391 config SPL_LOAD_FIT
 392         bool "Enable SPL loading U-Boot as a FIT (basic fitImage features)"
 393         select SPL_FIT
 394         help
 395           Normally with the SPL framework a legacy image is generated as part
 396           of the build. This contains U-Boot along with information as to
 397           where it should be loaded. This option instead enables generation
 398           of a FIT (Flat Image Tree) which provides more flexibility. In
 399           particular it can handle selecting from multiple device tree
 400           and passing the correct one to U-Boot.
 401
 402 config SPL_LOAD_FIT_FULL
 403         bool "Enable SPL loading U-Boot as a FIT (full fitImage features)"
 404         select SPL_FIT
 405         help
 406           Normally with the SPL framework a legacy image is generated as part
 407           of the build. This contains U-Boot along with information as to
 408           where it should be loaded. This option instead enables generation
 409           of a FIT (Flat Image Tree) which provides more flexibility. In
 410           particular it can handle selecting from multiple device tree
 411           and passing the correct one to U-Boot.
 412
 413 config SPL_FIT_IMAGE_POST_PROCESS
 414         bool "Enable post-processing of FIT artifacts after loading by the SPL"
 415         depends on SPL_LOAD_FIT
 416         help
 417           Allows doing any sort of manipulation to blobs after they got extracted
 418           from the U-Boot FIT image like stripping off headers or modifying the
 419           size of the blob, verification, authentication, decryption etc. in a
 420           platform or board specific way. In order to use this feature a platform
 421           or board-specific implementation of board_fit_image_post_process() must
 422           be provided. Also, anything done during this post-processing step would
 423           need to be comprehended in how the images were prepared before being
 424           injected into the FIT creation (i.e. the blobs would have been pre-
 425           processed before being added to the FIT image).
 426
 427 config SPL_FIT_SOURCE
 428         string ".its source file for U-Boot FIT image"
 429         depends on SPL_FIT
 430         help
 431           Specifies a (platform specific) FIT source file to generate the
 432           U-Boot FIT image. This could specify further image to load and/or
 433           execute.
 434
 435 config SPL_FIT_GENERATOR
 436         string ".its file generator script for U-Boot FIT image"
 437         depends on SPL_FIT
 438         default "board/sunxi/mksunxi_fit_atf.sh" if SPL_LOAD_FIT && ARCH_SUNXI
 439         default "arch/arm/mach-rockchip/make_fit_atf.py" if SPL_LOAD_FIT && ARCH_ROCKCHIP
 440         help
 441           Specifies a (platform specific) script file to generate the FIT
 442           source file used to build the U-Boot FIT image file. This gets
 443           passed a list of supported device tree file stub names to
 444           include in the generated image.
 445
 446 endif # SPL
 447
 448 endif # FIT
 449
 450 config IMAGE_FORMAT_LEGACY
 451         bool "Enable support for the legacy image format"
 452         default y if !FIT_SIGNATURE
 453         help
 454           This option enables the legacy image format. It is enabled by
 455           default for backward compatibility, unless FIT_SIGNATURE is
 456           set where it is disabled so that unsigned images cannot be
 457           loaded. If a board needs the legacy image format support in this
 458           case, enable it here.
 459
 460 config OF_BOARD_SETUP
 461         bool "Set up board-specific details in device tree before boot"
 462         depends on OF_LIBFDT
 463         help
 464           This causes U-Boot to call ft_board_setup() before booting into
 465           the Operating System. This function can set up various
 466           board-specific information in the device tree for use by the OS.
 467           The device tree is then passed to the OS.
 468
 469 config OF_SYSTEM_SETUP
 470         bool "Set up system-specific details in device tree before boot"
 471         depends on OF_LIBFDT
 472         help
 473           This causes U-Boot to call ft_system_setup() before booting into
 474           the Operating System. This function can set up various
 475           system-specific information in the device tree for use by the OS.
 476           The device tree is then passed to the OS.
 477
 478 config OF_STDOUT_VIA_ALIAS
 479         bool "Update the device-tree stdout alias from U-Boot"
 480         depends on OF_LIBFDT
 481         help
 482           This uses U-Boot's serial alias from the aliases node to update
 483           the device tree passed to the OS. The "linux,stdout-path" property
 484           in the chosen node is set to point to the correct serial node.
 485           This option currently references CONFIG_CONS_INDEX, which is
 486           incorrect when used with device tree as this option does not
 487           exist / should not be used.
 488
 489 config SYS_EXTRA_OPTIONS
 490         string "Extra Options (DEPRECATED)"
 491         help
 492           The old configuration infrastructure (= mkconfig + boards.cfg)
 493           provided the extra options field. If you have something like
 494           "HAS_BAR,BAZ=64", the optional options
 495             #define CONFIG_HAS
 496             #define CONFIG_BAZ  64
 497           will be defined in include/config.h.
 498           This option was prepared for the smooth migration from the old
 499           configuration to Kconfig. Since this option will be removed sometime,
 500           new boards should not use this option.
 501
 502 config SYS_TEXT_BASE
 503         depends on !NIOS2 && !XTENSA
 504         depends on !EFI_APP
 505         default 0x80800000 if ARCH_OMAP2PLUS || ARCH_K3
 506         default 0x4a000000 if ARCH_SUNXI && !MACH_SUN9I && !MACH_SUN8I_V3S
 507         default 0x2a000000 if ARCH_SUNXI && MACH_SUN9I
 508         default 0x42e00000 if ARCH_SUNXI && MACH_SUN8I_V3S
 509         hex "Text Base"
 510         help
 511           The address in memory that U-Boot will be running from, initially.
 512
 513
 514
 515 config SYS_CLK_FREQ
 516         depends on ARC || ARCH_SUNXI || MPC83xx
 517         int "CPU clock frequency"
 518         help
 519           TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
 520
 521 config ARCH_FIXUP_FDT_MEMORY
 522         bool "Enable arch_fixup_memory_banks() call"
 523         default y
 524         help
 525           Enable FDT memory map syncup before OS boot. This feature can be
 526           used for booting OS with different memory setup where the part of
 527           the memory location should be used for different purpose.
 528
 529 endmenu         # Boot images
 530
 531 source "api/Kconfig"
 532
 533 source "common/Kconfig"
 534
 535 source "cmd/Kconfig"
 536
 537 source "disk/Kconfig"
 538
 539 source "dts/Kconfig"
 540
 541 source "env/Kconfig"
 542
 543 source "net/Kconfig"
 544
 545 source "drivers/Kconfig"
 546
 547 source "fs/Kconfig"
 548
 549 source "lib/Kconfig"
 550
 551 source "test/Kconfig"