common/Kconfig

   1 menu "Boot timing"
   2
   3 config BOOTSTAGE
   4         bool "Boot timing and reporting"
   5         help
   6           Enable recording of boot time while booting. To use it, insert
   7           calls to bootstage_mark() with a suitable BOOTSTAGE_ID from
   8           bootstage.h. Only a single entry is recorded for each ID. You can
   9           give the entry a name with bootstage_mark_name(). You can also
  10           record elapsed time in a particular stage using bootstage_start()
  11           before starting and bootstage_accum() when finished. Bootstage will
  12           add up all the accumulated time and report it.
  13
  14           Normally, IDs are defined in bootstage.h but a small number of
  15           additional 'user' IDs can be used by passing BOOTSTAGE_ID_ALLOC
  16           as the ID.
  17
  18           Calls to show_boot_progress() will also result in log entries but
  19           these will not have names.
  20
  21 config SPL_BOOTSTAGE
  22         bool "Boot timing and reported in SPL"
  23         depends on BOOTSTAGE
  24         help
  25           Enable recording of boot time in SPL. To make this visible to U-Boot
  26           proper, enable BOOTSTAGE_STASH as well. This will stash the timing
  27           information when SPL finishes and load it when U-Boot proper starts
  28           up.
  29
  30 config TPL_BOOTSTAGE
  31         bool "Boot timing and reported in TPL"
  32         depends on BOOTSTAGE
  33         help
  34           Enable recording of boot time in SPL. To make this visible to U-Boot
  35           proper, enable BOOTSTAGE_STASH as well. This will stash the timing
  36           information when TPL finishes and load it when U-Boot proper starts
  37           up.
  38
  39 config BOOTSTAGE_REPORT
  40         bool "Display a detailed boot timing report before booting the OS"
  41         depends on BOOTSTAGE
  42         help
  43           Enable output of a boot time report just before the OS is booted.
  44           This shows how long it took U-Boot to go through each stage of the
  45           boot process. The report looks something like this:
  46
  47                 Timer summary in microseconds:
  48                        Mark    Elapsed  Stage
  49                           0          0  reset
  50                   3,575,678  3,575,678  board_init_f start
  51                   3,575,695         17  arch_cpu_init A9
  52                   3,575,777         82  arch_cpu_init done
  53                   3,659,598     83,821  board_init_r start
  54                   3,910,375    250,777  main_loop
  55                  29,916,167 26,005,792  bootm_start
  56                  30,361,327    445,160  start_kernel
  57
  58 config BOOTSTAGE_RECORD_COUNT
  59         int "Number of boot stage records to store"
  60         default 30
  61         help
  62           This is the size of the bootstage record list and is the maximum
  63           number of bootstage records that can be recorded.
  64
  65 config SPL_BOOTSTAGE_RECORD_COUNT
  66         int "Number of boot stage records to store for SPL"
  67         default 5
  68         help
  69           This is the size of the bootstage record list and is the maximum
  70           number of bootstage records that can be recorded.
  71
  72 config TPL_BOOTSTAGE_RECORD_COUNT
  73         int "Number of boot stage records to store for TPL"
  74         default 5
  75         help
  76           This is the size of the bootstage record list and is the maximum
  77           number of bootstage records that can be recorded.
  78
  79 config BOOTSTAGE_FDT
  80         bool "Store boot timing information in the OS device tree"
  81         depends on BOOTSTAGE
  82         help
  83           Stash the bootstage information in the FDT. A root 'bootstage'
  84           node is created with each bootstage id as a child. Each child
  85           has a 'name' property and either 'mark' containing the
  86           mark time in microseconds, or 'accum' containing the
  87           accumulated time for that bootstage id in microseconds.
  88           For example:
  89
  90                 bootstage {
  91                         154 {
  92                                 name = "board_init_f";
  93                                 mark = <3575678>;
  94                         };
  95                         170 {
  96                                 name = "lcd";
  97                                 accum = <33482>;
  98                         };
  99                 };
 100
 101           Code in the Linux kernel can find this in /proc/devicetree.
 102
 103 config BOOTSTAGE_STASH
 104         bool "Stash the boot timing information in memory before booting OS"
 105         depends on BOOTSTAGE
 106         help
 107           Some OSes do not support device tree. Bootstage can instead write
 108           the boot timing information in a binary format at a given address.
 109           This happens through a call to bootstage_stash(), typically in
 110           the CPU's cleanup_before_linux() function. You can use the
 111           'bootstage stash' and 'bootstage unstash' commands to do this on
 112           the command line.
 113
 114 config BOOTSTAGE_STASH_ADDR
 115         hex "Address to stash boot timing information"
 116         default 0
 117         help
 118           Provide an address which will not be overwritten by the OS when it
 119           starts, so that it can read this information when ready.
 120
 121 config BOOTSTAGE_STASH_SIZE
 122         hex "Size of boot timing stash region"
 123         default 0x1000
 124         help
 125           This should be large enough to hold the bootstage stash. A value of
 126           4096 (4KiB) is normally plenty.
 127
 128 config SHOW_BOOT_PROGRESS
 129         bool "Show boot progress in a board-specific manner"
 130         help
 131           Defining this option allows to add some board-specific code (calling
 132           a user-provided function show_boot_progress(int) that enables you to
 133           show the system's boot progress on some display (for example, some
 134           LEDs) on your board. At the moment, the following checkpoints are
 135           implemented:
 136
 137           Legacy uImage format:
 138
 139           Arg   Where                   When
 140             1   common/cmd_bootm.c      before attempting to boot an image
 141            -1   common/cmd_bootm.c      Image header has bad     magic number
 142             2   common/cmd_bootm.c      Image header has correct magic number
 143            -2   common/cmd_bootm.c      Image header has bad     checksum
 144             3   common/cmd_bootm.c      Image header has correct checksum
 145            -3   common/cmd_bootm.c      Image data   has bad     checksum
 146             4   common/cmd_bootm.c      Image data   has correct checksum
 147            -4   common/cmd_bootm.c      Image is for unsupported architecture
 148             5   common/cmd_bootm.c      Architecture check OK
 149            -5   common/cmd_bootm.c      Wrong Image Type (not kernel, multi)
 150             6   common/cmd_bootm.c      Image Type check OK
 151            -6   common/cmd_bootm.c      gunzip uncompression error
 152            -7   common/cmd_bootm.c      Unimplemented compression type
 153             7   common/cmd_bootm.c      Uncompression OK
 154             8   common/cmd_bootm.c      No uncompress/copy overwrite error
 155            -9   common/cmd_bootm.c      Unsupported OS (not Linux, BSD, VxWorks, QNX)
 156
 157             9   common/image.c          Start initial ramdisk verification
 158           -10   common/image.c          Ramdisk header has bad     magic number
 159           -11   common/image.c          Ramdisk header has bad     checksum
 160            10   common/image.c          Ramdisk header is OK
 161           -12   common/image.c          Ramdisk data   has bad     checksum
 162            11   common/image.c          Ramdisk data   has correct checksum
 163            12   common/image.c          Ramdisk verification complete, start loading
 164           -13   common/image.c          Wrong Image Type (not PPC Linux ramdisk)
 165            13   common/image.c          Start multifile image verification
 166            14   common/image.c          No initial ramdisk, no multifile, continue.
 167
 168            15   arch/<arch>/lib/bootm.c All preparation done, transferring control to OS
 169
 170           -30   arch/powerpc/lib/board.c        Fatal error, hang the system
 171           -31   post/post.c             POST test failed, detected by post_output_backlog()
 172           -32   post/post.c             POST test failed, detected by post_run_single()
 173
 174            34   common/cmd_doc.c        before loading a Image from a DOC device
 175           -35   common/cmd_doc.c        Bad usage of "doc" command
 176            35   common/cmd_doc.c        correct usage of "doc" command
 177           -36   common/cmd_doc.c        No boot device
 178            36   common/cmd_doc.c        correct boot device
 179           -37   common/cmd_doc.c        Unknown Chip ID on boot device
 180            37   common/cmd_doc.c        correct chip ID found, device available
 181           -38   common/cmd_doc.c        Read Error on boot device
 182            38   common/cmd_doc.c        reading Image header from DOC device OK
 183           -39   common/cmd_doc.c        Image header has bad magic number
 184            39   common/cmd_doc.c        Image header has correct magic number
 185           -40   common/cmd_doc.c        Error reading Image from DOC device
 186            40   common/cmd_doc.c        Image header has correct magic number
 187            41   common/cmd_ide.c        before loading a Image from a IDE device
 188           -42   common/cmd_ide.c        Bad usage of "ide" command
 189            42   common/cmd_ide.c        correct usage of "ide" command
 190           -43   common/cmd_ide.c        No boot device
 191            43   common/cmd_ide.c        boot device found
 192           -44   common/cmd_ide.c        Device not available
 193            44   common/cmd_ide.c        Device available
 194           -45   common/cmd_ide.c        wrong partition selected
 195            45   common/cmd_ide.c        partition selected
 196           -46   common/cmd_ide.c        Unknown partition table
 197            46   common/cmd_ide.c        valid partition table found
 198           -47   common/cmd_ide.c        Invalid partition type
 199            47   common/cmd_ide.c        correct partition type
 200           -48   common/cmd_ide.c        Error reading Image Header on boot device
 201            48   common/cmd_ide.c        reading Image Header from IDE device OK
 202           -49   common/cmd_ide.c        Image header has bad magic number
 203            49   common/cmd_ide.c        Image header has correct magic number
 204           -50   common/cmd_ide.c        Image header has bad     checksum
 205            50   common/cmd_ide.c        Image header has correct checksum
 206           -51   common/cmd_ide.c        Error reading Image from IDE device
 207            51   common/cmd_ide.c        reading Image from IDE device OK
 208            52   common/cmd_nand.c       before loading a Image from a NAND device
 209           -53   common/cmd_nand.c       Bad usage of "nand" command
 210            53   common/cmd_nand.c       correct usage of "nand" command
 211           -54   common/cmd_nand.c       No boot device
 212            54   common/cmd_nand.c       boot device found
 213           -55   common/cmd_nand.c       Unknown Chip ID on boot device
 214            55   common/cmd_nand.c       correct chip ID found, device available
 215           -56   common/cmd_nand.c       Error reading Image Header on boot device
 216            56   common/cmd_nand.c       reading Image Header from NAND device OK
 217           -57   common/cmd_nand.c       Image header has bad magic number
 218            57   common/cmd_nand.c       Image header has correct magic number
 219           -58   common/cmd_nand.c       Error reading Image from NAND device
 220            58   common/cmd_nand.c       reading Image from NAND device OK
 221
 222           -60   common/env_common.c     Environment has a bad CRC, using default
 223
 224            64   net/eth.c               starting with Ethernet configuration.
 225           -64   net/eth.c               no Ethernet found.
 226            65   net/eth.c               Ethernet found.
 227
 228           -80   common/cmd_net.c        usage wrong
 229            80   common/cmd_net.c        before calling net_loop()
 230           -81   common/cmd_net.c        some error in net_loop() occurred
 231            81   common/cmd_net.c        net_loop() back without error
 232           -82   common/cmd_net.c        size == 0 (File with size 0 loaded)
 233            82   common/cmd_net.c        trying automatic boot
 234            83   common/cmd_net.c        running "source" command
 235           -83   common/cmd_net.c        some error in automatic boot or "source" command
 236            84   common/cmd_net.c        end without errors
 237
 238           FIT uImage format:
 239
 240           Arg   Where                   When
 241           100   common/cmd_bootm.c      Kernel FIT Image has correct format
 242           -100  common/cmd_bootm.c      Kernel FIT Image has incorrect format
 243           101   common/cmd_bootm.c      No Kernel subimage unit name, using configuration
 244           -101  common/cmd_bootm.c      Can't get configuration for kernel subimage
 245           102   common/cmd_bootm.c      Kernel unit name specified
 246           -103  common/cmd_bootm.c      Can't get kernel subimage node offset
 247           103   common/cmd_bootm.c      Found configuration node
 248           104   common/cmd_bootm.c      Got kernel subimage node offset
 249           -104  common/cmd_bootm.c      Kernel subimage hash verification failed
 250           105   common/cmd_bootm.c      Kernel subimage hash verification OK
 251           -105  common/cmd_bootm.c      Kernel subimage is for unsupported architecture
 252           106   common/cmd_bootm.c      Architecture check OK
 253           -106  common/cmd_bootm.c      Kernel subimage has wrong type
 254           107   common/cmd_bootm.c      Kernel subimage type OK
 255           -107  common/cmd_bootm.c      Can't get kernel subimage data/size
 256           108   common/cmd_bootm.c      Got kernel subimage data/size
 257           -108  common/cmd_bootm.c      Wrong image type (not legacy, FIT)
 258           -109  common/cmd_bootm.c      Can't get kernel subimage type
 259           -110  common/cmd_bootm.c      Can't get kernel subimage comp
 260           -111  common/cmd_bootm.c      Can't get kernel subimage os
 261           -112  common/cmd_bootm.c      Can't get kernel subimage load address
 262           -113  common/cmd_bootm.c      Image uncompress/copy overwrite error
 263
 264           120   common/image.c          Start initial ramdisk verification
 265           -120  common/image.c          Ramdisk FIT image has incorrect format
 266           121   common/image.c          Ramdisk FIT image has correct format
 267           122   common/image.c          No ramdisk subimage unit name, using configuration
 268           -122  common/image.c          Can't get configuration for ramdisk subimage
 269           123   common/image.c          Ramdisk unit name specified
 270           -124  common/image.c          Can't get ramdisk subimage node offset
 271           125   common/image.c          Got ramdisk subimage node offset
 272           -125  common/image.c          Ramdisk subimage hash verification failed
 273           126   common/image.c          Ramdisk subimage hash verification OK
 274           -126  common/image.c          Ramdisk subimage for unsupported architecture
 275           127   common/image.c          Architecture check OK
 276           -127  common/image.c          Can't get ramdisk subimage data/size
 277           128   common/image.c          Got ramdisk subimage data/size
 278           129   common/image.c          Can't get ramdisk load address
 279           -129  common/image.c          Got ramdisk load address
 280
 281           -130  common/cmd_doc.c        Incorrect FIT image format
 282           131   common/cmd_doc.c        FIT image format OK
 283
 284           -140  common/cmd_ide.c        Incorrect FIT image format
 285           141   common/cmd_ide.c        FIT image format OK
 286
 287           -150  common/cmd_nand.c       Incorrect FIT image format
 288           151   common/cmd_nand.c       FIT image format OK
 289
 290 endmenu
 291
 292 menu "Boot media"
 293
 294 config NOR_BOOT
 295         bool "Support for booting from NOR flash"
 296         depends on NOR
 297         help
 298           Enabling this will make a U-Boot binary that is capable of being
 299           booted via NOR.  In this case we will enable certain pinmux early
 300           as the ROM only partially sets up pinmux.  We also default to using
 301           NOR for environment.
 302
 303 config NAND_BOOT
 304         bool "Support for booting from NAND flash"
 305         default n
 306         imply NAND
 307         help
 308           Enabling this will make a U-Boot binary that is capable of being
 309           booted via NAND flash. This is not a must, some SoCs need this,
 310           some not.
 311
 312 config ONENAND_BOOT
 313         bool "Support for booting from ONENAND"
 314         default n
 315         imply NAND
 316         help
 317           Enabling this will make a U-Boot binary that is capable of being
 318           booted via ONENAND. This is not a must, some SoCs need this,
 319           some not.
 320
 321 config QSPI_BOOT
 322         bool "Support for booting from QSPI flash"
 323         default n
 324         help
 325           Enabling this will make a U-Boot binary that is capable of being
 326           booted via QSPI flash. This is not a must, some SoCs need this,
 327           some not.
 328
 329 config SATA_BOOT
 330         bool "Support for booting from SATA"
 331         default n
 332         help
 333           Enabling this will make a U-Boot binary that is capable of being
 334           booted via SATA. This is not a must, some SoCs need this,
 335           some not.
 336
 337 config SD_BOOT
 338         bool "Support for booting from SD/EMMC"
 339         default n
 340         help
 341           Enabling this will make a U-Boot binary that is capable of being
 342           booted via SD/EMMC. This is not a must, some SoCs need this,
 343           some not.
 344
 345 config SPI_BOOT
 346         bool "Support for booting from SPI flash"
 347         default n
 348         help
 349           Enabling this will make a U-Boot binary that is capable of being
 350           booted via SPI flash. This is not a must, some SoCs need this,
 351           some not.
 352
 353 endmenu
 354
 355 config BOOTDELAY
 356         int "delay in seconds before automatically booting"
 357         default 2
 358         depends on AUTOBOOT
 359         help
 360           Delay before automatically running bootcmd;
 361           set to 0 to autoboot with no delay, but you can stop it by key input.
 362           set to -1 to disable autoboot.
 363           set to -2 to autoboot with no delay and not check for abort
 364
 365           If this value is >= 0 then it is also used for the default delay
 366           before starting the default entry in bootmenu. If it is < 0 then
 367           a default value of 10s is used.
 368
 369           See doc/README.autoboot for details.
 370
 371 config USE_BOOTARGS
 372         bool "Enable boot arguments"
 373         help
 374           Provide boot arguments to bootm command. Boot arguments are specified
 375           in CONFIG_BOOTARGS option. Enable this option to be able to specify
 376           CONFIG_BOOTARGS string. If this option is disabled, CONFIG_BOOTARGS
 377           will be undefined and won't take any space in U-Boot image.
 378
 379 config BOOTARGS
 380         string "Boot arguments"
 381         depends on USE_BOOTARGS
 382         help
 383           This can be used to pass arguments to the bootm command. The value of
 384           CONFIG_BOOTARGS goes into the environment value "bootargs". Note that
 385           this value will also override the "chosen" node in FDT blob.
 386
 387 config USE_BOOTCOMMAND
 388         bool "Enable a default value for bootcmd"
 389         help
 390           Provide a default value for the bootcmd entry in the environment.  If
 391           autoboot is enabled this is what will be run automatically.  Enable
 392           this option to be able to specify CONFIG_BOOTCOMMAND as a string.  If
 393           this option is disabled, CONFIG_BOOTCOMMAND will be undefined and
 394           won't take any space in U-Boot image.
 395
 396 config BOOTCOMMAND
 397         string "bootcmd value"
 398         depends on USE_BOOTCOMMAND
 399         default "run distro_bootcmd" if DISTRO_DEFAULTS
 400         help
 401           This is the string of commands that will be used as bootcmd and if
 402           AUTOBOOT is set, automatically run.
 403
 404 config USE_PREBOOT
 405         bool "Enable preboot"
 406         help
 407           When this option is enabled, the existence of the environment
 408           variable "preboot" will be checked immediately before starting the
 409           CONFIG_BOOTDELAY countdown and/or running the auto-boot command resp.
 410           entering interactive mode.
 411
 412           This feature is especially useful when "preboot" is automatically
 413           generated or modified. For example, the boot code can modify the
 414           "preboot" when a user holds down a certain combination of keys.
 415
 416 config PREBOOT
 417         string "preboot default value"
 418         depends on USE_PREBOOT
 419         default ""
 420         help
 421           This is the default of "preboot" environment variable.
 422
 423 menu "Console"
 424
 425 config MENU
 426         bool
 427         help
 428           This is the library functionality to provide a text-based menu of
 429           choices for the user to make choices with.
 430
 431 config CONSOLE_RECORD
 432         bool "Console recording"
 433         help
 434           This provides a way to record console output (and provide console
 435           input) through circular buffers. This is mostly useful for testing.
 436           Console output is recorded even when the console is silent.
 437           To enable console recording, call console_record_reset_enable()
 438           from your code.
 439
 440 config CONSOLE_RECORD_OUT_SIZE
 441         hex "Output buffer size"
 442         depends on CONSOLE_RECORD
 443         default 0x400 if CONSOLE_RECORD
 444         help
 445           Set the size of the console output buffer. When this fills up, no
 446           more data will be recorded until some is removed. The buffer is
 447           allocated immediately after the malloc() region is ready.
 448
 449 config CONSOLE_RECORD_IN_SIZE
 450         hex "Input buffer size"
 451         depends on CONSOLE_RECORD
 452         default 0x100 if CONSOLE_RECORD
 453         help
 454           Set the size of the console input buffer. When this contains data,
 455           tstc() and getc() will use this in preference to real device input.
 456           The buffer is allocated immediately after the malloc() region is
 457           ready.
 458
 459 config DISABLE_CONSOLE
 460         bool "Add functionality to disable console completely"
 461         help
 462                 Disable console (in & out).
 463
 464 config IDENT_STRING
 465         string "Board specific string to be added to uboot version string"
 466         help
 467           This options adds the board specific name to u-boot version.
 468
 469 config LOGLEVEL
 470         int "loglevel"
 471         default 4
 472         range 0 8
 473         help
 474           All Messages with a loglevel smaller than the console loglevel will
 475           be compiled in. The loglevels are defined as follows:
 476
 477             0 - emergency
 478             1 - alert
 479             2 - critical
 480             3 - error
 481             4 - warning
 482             5 - note
 483             6 - info
 484             7 - debug
 485             8 - debug content
 486             9 - debug hardware I/O
 487
 488 config SPL_LOGLEVEL
 489         int
 490         default LOGLEVEL
 491
 492 config TPL_LOGLEVEL
 493         int
 494         default LOGLEVEL
 495
 496 config SILENT_CONSOLE
 497         bool "Support a silent console"
 498         help
 499           This option allows the console to be silenced, meaning that no
 500           output will appear on the console devices. This is controlled by
 501           setting the environment variable 'silent' to a non-empty value.
 502           Note this also silences the console when booting Linux.
 503
 504           When the console is set up, the variable is checked, and the
 505           GD_FLG_SILENT flag is set. Changing the environment variable later
 506           will update the flag.
 507
 508 config SILENT_U_BOOT_ONLY
 509         bool "Only silence the U-Boot console"
 510         depends on SILENT_CONSOLE
 511         help
 512           Normally when the U-Boot console is silenced, Linux's console is
 513           also silenced (assuming the board boots into Linux). This option
 514           allows the linux console to operate normally, even if U-Boot's
 515           is silenced.
 516
 517 config SILENT_CONSOLE_UPDATE_ON_SET
 518         bool "Changes to the 'silent' environment variable update immediately"
 519         depends on SILENT_CONSOLE
 520         default y if SILENT_CONSOLE
 521         help
 522           When the 'silent' environment variable is changed, update the
 523           console silence flag immediately. This allows 'setenv' to be used
 524           to silence or un-silence the console.
 525
 526           The effect is that any change to the variable will affect the
 527           GD_FLG_SILENT flag.
 528
 529 config SILENT_CONSOLE_UPDATE_ON_RELOC
 530         bool "Allow flags to take effect on relocation"
 531         depends on SILENT_CONSOLE
 532         help
 533           In some cases the environment is not available until relocation
 534           (e.g. NAND). This option makes the value of the 'silent'
 535           environment variable take effect at relocation.
 536
 537 config PRE_CONSOLE_BUFFER
 538         bool "Buffer characters before the console is available"
 539         help
 540           Prior to the console being initialised (i.e. serial UART
 541           initialised etc) all console output is silently discarded.
 542           Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to
 543           buffer any console messages prior to the console being
 544           initialised to a buffer. The buffer is a circular buffer, so
 545           if it overflows, earlier output is discarded.
 546
 547           Note that this is not currently supported in SPL. It would be
 548           useful to be able to share the pre-console buffer with SPL.
 549
 550 config PRE_CON_BUF_SZ
 551         int "Sets the size of the pre-console buffer"
 552         depends on PRE_CONSOLE_BUFFER
 553         default 4096
 554         help
 555           The size of the pre-console buffer affects how much console output
 556           can be held before it overflows and starts discarding earlier
 557           output. Normally there is very little output at this early stage,
 558           unless debugging is enabled, so allow enough for ~10 lines of
 559           text.
 560
 561           This is a useful feature if you are using a video console and
 562           want to see the full boot output on the console. Without this
 563           option only the post-relocation output will be displayed.
 564
 565 config PRE_CON_BUF_ADDR
 566         hex "Address of the pre-console buffer"
 567         depends on PRE_CONSOLE_BUFFER
 568         default 0x2f000000 if ARCH_SUNXI && MACH_SUN9I
 569         default 0x4f000000 if ARCH_SUNXI && !MACH_SUN9I
 570         help
 571           This sets the start address of the pre-console buffer. This must
 572           be in available memory and is accessed before relocation and
 573           possibly before DRAM is set up. Therefore choose an address
 574           carefully.
 575
 576           We should consider removing this option and allocating the memory
 577           in board_init_f_init_reserve() instead.
 578
 579 config CONSOLE_MUX
 580         bool "Enable console multiplexing"
 581         default y if DM_VIDEO || VIDEO || LCD
 582         help
 583           This allows multiple devices to be used for each console 'file'.
 584           For example, stdout can be set to go to serial and video.
 585           Similarly, stdin can be set to come from serial and keyboard.
 586           Input can be provided from either source. Console multiplexing
 587           adds a small amount of size to U-Boot.  Changes to the environment
 588           variables stdout, stdin and stderr will take effect immediately.
 589
 590 config SYS_CONSOLE_IS_IN_ENV
 591         bool "Select console devices from the environment"
 592         default y if CONSOLE_MUX
 593         help
 594           This allows multiple input/output devices to be set at boot time.
 595           For example, if stdout is set to "serial,video" then output will
 596           be sent to both the serial and video devices on boot. The
 597           environment variables can be updated after boot to change the
 598           input/output devices.
 599
 600 config SYS_CONSOLE_OVERWRITE_ROUTINE
 601         bool "Allow board control over console overwriting"
 602         help
 603           If this is enabled, and the board-specific function
 604           overwrite_console() returns 1, the stdin, stderr and stdout are
 605           switched to the serial port, else the settings in the environment
 606           are used. If this is not enabled, the console will not be switched
 607           to serial.
 608
 609 config SYS_CONSOLE_ENV_OVERWRITE
 610         bool "Update environment variables during console init"
 611         help
 612           The console environment variables (stdout, stdin, stderr) can be
 613           used to determine the correct console devices on start-up. This
 614           option writes the console devices to these variables on console
 615           start-up (after relocation). This causes the environment to be
 616           updated to match the console devices actually chosen.
 617
 618 config SYS_CONSOLE_INFO_QUIET
 619         bool "Don't display the console devices on boot"
 620         help
 621           Normally U-Boot displays the current settings for stdout, stdin
 622           and stderr on boot when the post-relocation console is set up.
 623           Enable this option to suppress this output. It can be obtained by
 624           calling stdio_print_current_devices() from board code.
 625
 626 config SYS_STDIO_DEREGISTER
 627         bool "Allow deregistering stdio devices"
 628         default y if USB_KEYBOARD
 629         help
 630           Generally there is no need to deregister stdio devices since they
 631           are never deactivated. But if a stdio device is used which can be
 632           removed (for example a USB keyboard) then this option can be
 633           enabled to ensure this is handled correctly.
 634
 635 endmenu
 636
 637 menu "Logging"
 638
 639 config LOG
 640         bool "Enable logging support"
 641         depends on DM
 642         help
 643           This enables support for logging of status and debug messages. These
 644           can be displayed on the console, recorded in a memory buffer, or
 645           discarded if not needed. Logging supports various categories and
 646           levels of severity.
 647
 648 config SPL_LOG
 649         bool "Enable logging support in SPL"
 650         depends on LOG
 651         help
 652           This enables support for logging of status and debug messages. These
 653           can be displayed on the console, recorded in a memory buffer, or
 654           discarded if not needed. Logging supports various categories and
 655           levels of severity.
 656
 657 config TPL_LOG
 658         bool "Enable logging support in TPL"
 659         depends on LOG
 660         help
 661           This enables support for logging of status and debug messages. These
 662           can be displayed on the console, recorded in a memory buffer, or
 663           discarded if not needed. Logging supports various categories and
 664           levels of severity.
 665
 666 config LOG_MAX_LEVEL
 667         int "Maximum log level to record"
 668         depends on LOG
 669         default 5
 670         help
 671           This selects the maximum log level that will be recorded. Any value
 672           higher than this will be ignored. If possible log statements below
 673           this level will be discarded at build time. Levels:
 674
 675             0 - emergency
 676             1 - alert
 677             2 - critical
 678             3 - error
 679             4 - warning
 680             5 - note
 681             6 - info
 682             7 - debug
 683             8 - debug content
 684             9 - debug hardware I/O
 685
 686 config SPL_LOG_MAX_LEVEL
 687         int "Maximum log level to record in SPL"
 688         depends on SPL_LOG
 689         default 3
 690         help
 691           This selects the maximum log level that will be recorded. Any value
 692           higher than this will be ignored. If possible log statements below
 693           this level will be discarded at build time. Levels:
 694
 695             0 - emergency
 696             1 - alert
 697             2 - critical
 698             3 - error
 699             4 - warning
 700             5 - note
 701             6 - info
 702             7 - debug
 703             8 - debug content
 704             9 - debug hardware I/O
 705
 706 config TPL_LOG_MAX_LEVEL
 707         int "Maximum log level to record in TPL"
 708         depends on TPL_LOG
 709         default 3
 710         help
 711           This selects the maximum log level that will be recorded. Any value
 712           higher than this will be ignored. If possible log statements below
 713           this level will be discarded at build time. Levels:
 714
 715             0 - emergency
 716             1 - alert
 717             2 - critical
 718             3 - error
 719             4 - warning
 720             5 - note
 721             6 - info
 722             7 - debug
 723             8 - debug content
 724             9 - debug hardware I/O
 725
 726 config LOG_DEFAULT_LEVEL
 727         int "Default logging level to display"
 728         default 6
 729         help
 730           This is the default logging level set when U-Boot starts. It can
 731           be adjusted later using the 'log level' command. Note that setting
 732           this to a value above LOG_MAX_LEVEL will be ineffective, since the
 733           higher levels are not compiled in to U-Boot.
 734
 735             0 - emergency
 736             1 - alert
 737             2 - critical
 738             3 - error
 739             4 - warning
 740             5 - note
 741             6 - info
 742             7 - debug
 743             8 - debug content
 744             9 - debug hardware I/O
 745
 746 config LOG_CONSOLE
 747         bool "Allow log output to the console"
 748         depends on LOG
 749         default y
 750         help
 751           Enables a log driver which writes log records to the console.
 752           Generally the console is the serial port or LCD display. Only the
 753           log message is shown - other details like level, category, file and
 754           line number are omitted.
 755
 756 config SPL_LOG_CONSOLE
 757         bool "Allow log output to the console in SPL"
 758         depends on SPL_LOG
 759         default y
 760         help
 761           Enables a log driver which writes log records to the console.
 762           Generally the console is the serial port or LCD display. Only the
 763           log message is shown - other details like level, category, file and
 764           line number are omitted.
 765
 766 config TPL_LOG_CONSOLE
 767         bool "Allow log output to the console in SPL"
 768         depends on TPL_LOG
 769         default y
 770         help
 771           Enables a log driver which writes log records to the console.
 772           Generally the console is the serial port or LCD display. Only the
 773           log message is shown - other details like level, category, file and
 774           line number are omitted.
 775
 776 config LOG_TEST
 777         bool "Provide a test for logging"
 778         depends on LOG
 779         default y if SANDBOX
 780         help
 781           This enables a 'log test' command to test logging. It is normally
 782           executed from a pytest and simply outputs logging information
 783           in various different ways to test that the logging system works
 784           correctly with various settings.
 785
 786 config LOG_ERROR_RETURN
 787         bool "Log all functions which return an error"
 788         depends on LOG
 789         help
 790           When an error is returned in U-Boot it is sometimes difficult to
 791           figure out the root cause. For example, reading from SPI flash may
 792           fail due to a problem in the SPI controller or due to the flash part
 793           not returning the expected information. This option changes
 794           log_ret() to log any errors it sees. With this option disabled,
 795           log_ret() is a nop.
 796
 797           You can add log_ret() to all functions which return an error code.
 798
 799 endmenu
 800
 801 config SUPPORT_RAW_INITRD
 802         bool "Enable raw initrd images"
 803         help
 804           Note, defining the SUPPORT_RAW_INITRD allows user to supply
 805           kernel with raw initrd images. The syntax is slightly different, the
 806           address of the initrd must be augmented by it's size, in the following
 807           format: "<initrd address>:<initrd size>".
 808
 809 config DEFAULT_FDT_FILE
 810         string "Default fdt file"
 811         help
 812           This option is used to set the default fdt file to boot OS.
 813
 814 config MISC_INIT_R
 815         bool "Execute Misc Init"
 816         default y if ARCH_KEYSTONE || ARCH_SUNXI || MPC85xx
 817         default y if ARCH_OMAP2PLUS && !AM33XX
 818         help
 819           Enabling this option calls 'misc_init_r' function
 820
 821 config VERSION_VARIABLE
 822         bool "add U-Boot environment variable vers"
 823         default n
 824         help
 825           If this variable is defined, an environment variable
 826           named "ver" is created by U-Boot showing the U-Boot
 827           version as printed by the "version" command.
 828           Any change to this variable will be reverted at the
 829           next reset.
 830
 831 config BOARD_LATE_INIT
 832         bool "Execute Board late init"
 833         help
 834           Sometimes board require some initialization code that might
 835           require once the actual init done, example saving board specific env,
 836           boot-modes etc. which eventually done at late.
 837
 838           So this config enable the late init code with the help of board_late_init
 839           function which should defined on respective boards.
 840
 841 config DISPLAY_CPUINFO
 842         bool "Display information about the CPU during start up"
 843         default y if ARC|| ARM || NIOS2 || X86 || XTENSA || M68K
 844         help
 845           Display information about the CPU that U-Boot is running on
 846           when U-Boot starts up. The function print_cpuinfo() is called
 847           to do this.
 848
 849 config DISPLAY_BOARDINFO
 850         bool "Display information about the board during early start up"
 851         default y if ARC || ARM || M68K || MIPS || PPC || SANDBOX || XTENSA
 852         help
 853           Display information about the board that U-Boot is running on
 854           when U-Boot starts up. The board function checkboard() is called
 855           to do this.
 856
 857 config DISPLAY_BOARDINFO_LATE
 858         bool "Display information about the board during late start up"
 859         help
 860           Display information about the board that U-Boot is running on after
 861           the relocation phase. The board function checkboard() is called to do
 862           this.
 863
 864 config BOUNCE_BUFFER
 865         bool "Include bounce buffer API"
 866         help
 867           Some peripherals support DMA from a subset of physically
 868           addressable memory only.  To support such peripherals, the
 869           bounce buffer API uses a temporary buffer: it copies data
 870           to/from DMA regions while managing cache operations.
 871
 872           A second possible use of bounce buffers is their ability to
 873           provide aligned buffers for DMA operations.
 874
 875 config BOARD_TYPES
 876         bool "Call get_board_type() to get and display the board type"
 877         help
 878           If this option is enabled, checkboard() will call get_board_type()
 879           to get a string containing the board type and this will be
 880           displayed immediately after the model is shown on the console
 881           early in boot.
 882
 883 menu "Start-up hooks"
 884
 885 config ARCH_EARLY_INIT_R
 886         bool "Call arch-specific init soon after relocation"
 887         help
 888           With this option U-Boot will call arch_early_init_r() soon after
 889           relocation. Driver model is running by this point, and the cache
 890           is on. Note that board_early_init_r() is called first, if
 891           enabled. This can be used to set up architecture-specific devices.
 892
 893 config ARCH_MISC_INIT
 894         bool "Call arch-specific init after relocation, when console is ready"
 895         help
 896           With this option U-Boot will call arch_misc_init() after
 897           relocation to allow miscellaneous arch-dependent initialisation
 898           to be performed. This function should be defined by the board
 899           and will be called after the console is set up, after relocation.
 900
 901 config BOARD_EARLY_INIT_F
 902         bool "Call board-specific init before relocation"
 903         help
 904           Some boards need to perform initialisation as soon as possible
 905           after boot. With this option, U-Boot calls board_early_init_f()
 906           after driver model is ready in the pre-relocation init sequence.
 907           Note that the normal serial console is not yet set up, but the
 908           debug UART will be available if enabled.
 909
 910 config BOARD_EARLY_INIT_R
 911         bool "Call board-specific init after relocation"
 912         help
 913           Some boards need to perform initialisation as directly after
 914           relocation. With this option, U-Boot calls board_early_init_r()
 915           in the post-relocation init sequence.
 916
 917 config LAST_STAGE_INIT
 918         bool "Call board-specific as last setup step"
 919         help
 920           Some boards need to perform initialisation immediately before control
 921           is passed to the command-line interpreter (e.g. for initializations
 922           that depend on later phases in the init sequence). With this option,
 923           U-Boot calls last_stage_init() before the command-line interpreter is
 924           started.
 925
 926 endmenu
 927
 928 menu "Security support"
 929
 930 config HASH
 931         bool # "Support hashing API (SHA1, SHA256, etc.)"
 932         help
 933           This provides a way to hash data in memory using various supported
 934           algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
 935           and the algorithms it supports are defined in common/hash.c. See
 936           also CMD_HASH for command-line access.
 937
 938 config AVB_VERIFY
 939         bool "Build Android Verified Boot operations"
 940         depends on LIBAVB && FASTBOOT
 941         depends on PARTITION_UUIDS
 942         help
 943           This option enables compilation of bootloader-dependent operations,
 944           used by Android Verified Boot 2.0 library (libavb). Includes:
 945             * Helpers to process strings in order to build OS bootargs.
 946             * Helpers to access MMC, similar to drivers/fastboot/fb_mmc.c.
 947             * Helpers to alloc/init/free avb ops.
 948
 949 config SPL_HASH
 950         bool # "Support hashing API (SHA1, SHA256, etc.)"
 951         help
 952           This provides a way to hash data in memory using various supported
 953           algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
 954           and the algorithms it supports are defined in common/hash.c. See
 955           also CMD_HASH for command-line access.
 956
 957 config TPL_HASH
 958         bool # "Support hashing API (SHA1, SHA256, etc.)"
 959         help
 960           This provides a way to hash data in memory using various supported
 961           algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
 962           and the algorithms it supports are defined in common/hash.c. See
 963           also CMD_HASH for command-line access.
 964
 965 endmenu
 966
 967 menu "Update support"
 968
 969 config UPDATE_TFTP
 970         bool "Auto-update using fitImage via TFTP"
 971         depends on FIT
 972         help
 973           This option allows performing update of NOR with data in fitImage
 974           sent via TFTP boot.
 975
 976 config UPDATE_TFTP_CNT_MAX
 977         int "The number of connection retries during auto-update"
 978         default 0
 979         depends on UPDATE_TFTP
 980
 981 config UPDATE_TFTP_MSEC_MAX
 982         int "Delay in mSec to wait for the TFTP server during auto-update"
 983         default 100
 984         depends on UPDATE_TFTP
 985
 986 config ANDROID_AB
 987         bool "Android A/B updates"
 988         default n
 989         help
 990           If enabled, adds support for the new Android A/B update model. This
 991           allows the bootloader to select which slot to boot from based on the
 992           information provided by userspace via the Android boot_ctrl HAL. This
 993           allows a bootloader to try a new version of the system but roll back
 994           to previous version if the new one didn't boot all the way.
 995
 996 endmenu
 997
 998 menu "Blob list"
 999
1000 config BLOBLIST
1001         bool "Support for a bloblist"
1002         help
1003           This enables support for a bloblist in U-Boot, which can be passed
1004           from TPL to SPL to U-Boot proper (and potentially to Linux). The
1005           blob list supports multiple binary blobs of data, each with a tag,
1006           so that different U-Boot components can store data which can survive
1007           through to the next stage of the boot.
1008
1009 config SPL_BLOBLIST
1010         bool "Support for a bloblist in SPL"
1011         depends on BLOBLIST
1012         default y if SPL
1013         help
1014           This enables a bloblist in SPL. If this is the first part of U-Boot
1015           to run, then the bloblist is set up in SPL and passed to U-Boot
1016           proper. If TPL also has a bloblist, then SPL uses the one from there.
1017
1018 config TPL_BLOBLIST
1019         bool "Support for a bloblist in TPL"
1020         depends on BLOBLIST
1021         default y if TPL
1022         help
1023           This enables a bloblist in TPL. The bloblist is set up in TPL and
1024           passed to SPL and U-Boot proper.
1025
1026 config BLOBLIST_SIZE
1027         hex "Size of bloblist"
1028         depends on BLOBLIST
1029         default 0x400
1030         help
1031           Sets the size of the bloblist in bytes. This must include all
1032           overhead (alignment, bloblist header, record header). The bloblist
1033           is set up in the first part of U-Boot to run (TPL, SPL or U-Boot
1034           proper), and this sane bloblist is used for subsequent stages.
1035
1036 config BLOBLIST_ADDR
1037         hex "Address of bloblist"
1038         depends on BLOBLIST
1039         default 0xe000 if SANDBOX
1040         help
1041           Sets the address of the bloblist, set up by the first part of U-Boot
1042           which runs. Subsequent U-Boot stages typically use the same address.
1043
1044 endmenu
1045
1046 source "common/spl/Kconfig"