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 BOOTSTAGE_REPORT
  31         bool "Display a detailed boot timing report before booting the OS"
  32         depends on BOOTSTAGE
  33         help
  34           Enable output of a boot time report just before the OS is booted.
  35           This shows how long it took U-Boot to go through each stage of the
  36           boot process. The report looks something like this:
  37
  38                 Timer summary in microseconds:
  39                        Mark    Elapsed  Stage
  40                           0          0  reset
  41                   3,575,678  3,575,678  board_init_f start
  42                   3,575,695         17  arch_cpu_init A9
  43                   3,575,777         82  arch_cpu_init done
  44                   3,659,598     83,821  board_init_r start
  45                   3,910,375    250,777  main_loop
  46                  29,916,167 26,005,792  bootm_start
  47                  30,361,327    445,160  start_kernel
  48
  49 config BOOTSTAGE_USER_COUNT
  50         int "Number of boot ID numbers available for user use"
  51         default 20
  52         help
  53           This is the number of available user bootstage records.
  54           Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...)
  55           a new ID will be allocated from this stash. If you exceed
  56           the limit, recording will stop.
  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 BOOTSTAGE_FDT
  66         bool "Store boot timing information in the OS device tree"
  67         depends on BOOTSTAGE
  68         help
  69           Stash the bootstage information in the FDT. A root 'bootstage'
  70           node is created with each bootstage id as a child. Each child
  71           has a 'name' property and either 'mark' containing the
  72           mark time in microseconds, or 'accum' containing the
  73           accumulated time for that bootstage id in microseconds.
  74           For example:
  75
  76                 bootstage {
  77                         154 {
  78                                 name = "board_init_f";
  79                                 mark = <3575678>;
  80                         };
  81                         170 {
  82                                 name = "lcd";
  83                                 accum = <33482>;
  84                         };
  85                 };
  86
  87           Code in the Linux kernel can find this in /proc/devicetree.
  88
  89 config BOOTSTAGE_STASH
  90         bool "Stash the boot timing information in memory before booting OS"
  91         depends on BOOTSTAGE
  92         help
  93           Some OSes do not support device tree. Bootstage can instead write
  94           the boot timing information in a binary format at a given address.
  95           This happens through a call to bootstage_stash(), typically in
  96           the CPU's cleanup_before_linux() function. You can use the
  97           'bootstage stash' and 'bootstage unstash' commands to do this on
  98           the command line.
  99
 100 config BOOTSTAGE_STASH_ADDR
 101         hex "Address to stash boot timing information"
 102         default 0
 103         help
 104           Provide an address which will not be overwritten by the OS when it
 105           starts, so that it can read this information when ready.
 106
 107 config BOOTSTAGE_STASH_SIZE
 108         hex "Size of boot timing stash region"
 109         default 0x1000
 110         help
 111           This should be large enough to hold the bootstage stash. A value of
 112           4096 (4KiB) is normally plenty.
 113
 114 endmenu
 115
 116 menu "Boot media"
 117
 118 config NOR_BOOT
 119         bool "Support for booting from NOR flash"
 120         depends on NOR
 121         help
 122           Enabling this will make a U-Boot binary that is capable of being
 123           booted via NOR.  In this case we will enable certain pinmux early
 124           as the ROM only partially sets up pinmux.  We also default to using
 125           NOR for environment.
 126
 127 config NAND_BOOT
 128         bool "Support for booting from NAND flash"
 129         default n
 130         help
 131           Enabling this will make a U-Boot binary that is capable of being
 132           booted via NAND flash. This is not a must, some SoCs need this,
 133           some not.
 134
 135 config ONENAND_BOOT
 136         bool "Support for booting from ONENAND"
 137         default n
 138         help
 139           Enabling this will make a U-Boot binary that is capable of being
 140           booted via ONENAND. This is not a must, some SoCs need this,
 141           some not.
 142
 143 config QSPI_BOOT
 144         bool "Support for booting from QSPI flash"
 145         default n
 146         help
 147           Enabling this will make a U-Boot binary that is capable of being
 148           booted via QSPI flash. This is not a must, some SoCs need this,
 149           some not.
 150
 151 config SATA_BOOT
 152         bool "Support for booting from SATA"
 153         default n
 154         help
 155           Enabling this will make a U-Boot binary that is capable of being
 156           booted via SATA. This is not a must, some SoCs need this,
 157           some not.
 158
 159 config SD_BOOT
 160         bool "Support for booting from SD/EMMC"
 161         default n
 162         help
 163           Enabling this will make a U-Boot binary that is capable of being
 164           booted via SD/EMMC. This is not a must, some SoCs need this,
 165           some not.
 166
 167 config SPI_BOOT
 168         bool "Support for booting from SPI flash"
 169         default n
 170         help
 171           Enabling this will make a U-Boot binary that is capable of being
 172           booted via SPI flash. This is not a must, some SoCs need this,
 173           some not.
 174
 175 endmenu
 176
 177 menu "Environment"
 178
 179 config ENV_IS_IN_DATAFLASH
 180         bool "Environment in dataflash"
 181         depends on !CHAIN_OF_TRUST
 182         help
 183           Define this if you have a DataFlash memory device which you
 184           want to use for the environment.
 185
 186           - CONFIG_ENV_OFFSET:
 187           - CONFIG_ENV_ADDR:
 188           - CONFIG_ENV_SIZE:
 189
 190           These three #defines specify the offset and size of the
 191           environment area within the total memory of your DataFlash placed
 192           at the specified address.
 193
 194 config ENV_IS_IN_EEPROM
 195         bool "Environment in EEPROM"
 196         depends on !CHAIN_OF_TRUST
 197         help
 198           Use this if you have an EEPROM or similar serial access
 199           device and a driver for it.
 200
 201           - CONFIG_ENV_OFFSET:
 202           - CONFIG_ENV_SIZE:
 203
 204           These two #defines specify the offset and size of the
 205           environment area within the total memory of your EEPROM.
 206
 207           - CONFIG_SYS_I2C_EEPROM_ADDR:
 208           If defined, specified the chip address of the EEPROM device.
 209           The default address is zero.
 210
 211           - CONFIG_SYS_I2C_EEPROM_BUS:
 212           If defined, specified the i2c bus of the EEPROM device.
 213
 214           - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS:
 215           If defined, the number of bits used to address bytes in a
 216           single page in the EEPROM device.  A 64 byte page, for example
 217           would require six bits.
 218
 219           - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS:
 220           If defined, the number of milliseconds to delay between
 221           page writes.  The default is zero milliseconds.
 222
 223           - CONFIG_SYS_I2C_EEPROM_ADDR_LEN:
 224           The length in bytes of the EEPROM memory array address.  Note
 225           that this is NOT the chip address length!
 226
 227           - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW:
 228           EEPROM chips that implement "address overflow" are ones
 229           like Catalyst 24WC04/08/16 which has 9/10/11 bits of
 230           address and the extra bits end up in the "chip address" bit
 231           slots. This makes a 24WC08 (1Kbyte) chip look like four 256
 232           byte chips.
 233
 234           Note that we consider the length of the address field to
 235           still be one byte because the extra address bits are hidden
 236           in the chip address.
 237
 238           - CONFIG_SYS_EEPROM_SIZE:
 239           The size in bytes of the EEPROM device.
 240
 241           - CONFIG_ENV_EEPROM_IS_ON_I2C
 242           define this, if you have I2C and SPI activated, and your
 243           EEPROM, which holds the environment, is on the I2C bus.
 244
 245           - CONFIG_I2C_ENV_EEPROM_BUS
 246           if you have an Environment on an EEPROM reached over
 247           I2C muxes, you can define here, how to reach this
 248           EEPROM. For example:
 249
 250           #define CONFIG_I2C_ENV_EEPROM_BUS       1
 251
 252           EEPROM which holds the environment, is reached over
 253           a pca9547 i2c mux with address 0x70, channel 3.
 254
 255 config ENV_IS_IN_FAT
 256         bool "Environment is in a FAT filesystem"
 257         depends on !CHAIN_OF_TRUST
 258         help
 259          Define this if you want to use the FAT file system for the environment.
 260
 261          - FAT_ENV_INTERFACE:
 262
 263          Define this to a string that is the name of the block device.
 264
 265          - FAT_ENV_DEVICE_AND_PART:
 266
 267          Define this to a string to specify the partition of the device. It can
 268          be as following:
 269
 270            "D:P", "D:0", "D", "D:" or "D:auto" (D, P are integers. And P >= 1)
 271                - "D:P": device D partition P. Error occurs if device D has no
 272                         partition table.
 273                - "D:0": device D.
 274                - "D" or "D:": device D partition 1 if device D has partition
 275                               table, or the whole device D if has no partition
 276                               table.
 277                - "D:auto": first partition in device D with bootable flag set.
 278                            If none, first valid partition in device D. If no
 279                            partition table then means device D.
 280
 281          - FAT_ENV_FILE:
 282
 283          It's a string of the FAT file name. This file use to store the
 284          environment.
 285
 286          - CONFIG_FAT_WRITE:
 287          This must be enabled. Otherwise it cannot save the environment file.
 288
 289 config ENV_IS_IN_FLASH
 290         bool "Environment in flash memory"
 291         depends on !CHAIN_OF_TRUST
 292         help
 293           Define this if you have a flash device which you want to use for the
 294           environment.
 295
 296           a) The environment occupies one whole flash sector, which is
 297            "embedded" in the text segment with the U-Boot code. This
 298            happens usually with "bottom boot sector" or "top boot
 299            sector" type flash chips, which have several smaller
 300            sectors at the start or the end. For instance, such a
 301            layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In
 302            such a case you would place the environment in one of the
 303            4 kB sectors - with U-Boot code before and after it. With
 304            "top boot sector" type flash chips, you would put the
 305            environment in one of the last sectors, leaving a gap
 306            between U-Boot and the environment.
 307
 308           CONFIG_ENV_OFFSET:
 309
 310            Offset of environment data (variable area) to the
 311            beginning of flash memory; for instance, with bottom boot
 312            type flash chips the second sector can be used: the offset
 313            for this sector is given here.
 314
 315            CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE.
 316
 317           CONFIG_ENV_ADDR:
 318
 319            This is just another way to specify the start address of
 320            the flash sector containing the environment (instead of
 321            CONFIG_ENV_OFFSET).
 322
 323           CONFIG_ENV_SECT_SIZE:
 324
 325            Size of the sector containing the environment.
 326
 327
 328           b) Sometimes flash chips have few, equal sized, BIG sectors.
 329            In such a case you don't want to spend a whole sector for
 330            the environment.
 331
 332           CONFIG_ENV_SIZE:
 333
 334            If you use this in combination with CONFIG_ENV_IS_IN_FLASH
 335            and CONFIG_ENV_SECT_SIZE, you can specify to use only a part
 336            of this flash sector for the environment. This saves
 337            memory for the RAM copy of the environment.
 338
 339            It may also save flash memory if you decide to use this
 340            when your environment is "embedded" within U-Boot code,
 341            since then the remainder of the flash sector could be used
 342            for U-Boot code. It should be pointed out that this is
 343            STRONGLY DISCOURAGED from a robustness point of view:
 344            updating the environment in flash makes it always
 345            necessary to erase the WHOLE sector. If something goes
 346            wrong before the contents has been restored from a copy in
 347            RAM, your target system will be dead.
 348
 349           CONFIG_ENV_ADDR_REDUND
 350           CONFIG_ENV_SIZE_REDUND
 351
 352            These settings describe a second storage area used to hold
 353            a redundant copy of the environment data, so that there is
 354            a valid backup copy in case there is a power failure during
 355            a "saveenv" operation.
 356
 357           BE CAREFUL! Any changes to the flash layout, and some changes to the
 358           source code will make it necessary to adapt <board>/u-boot.lds*
 359           accordingly!
 360
 361 config ENV_IS_IN_MMC
 362         bool "Environment in an MMC device"
 363         depends on !CHAIN_OF_TRUST
 364         default y if ARCH_SUNXI
 365         help
 366           Define this if you have an MMC device which you want to use for the
 367           environment.
 368
 369           CONFIG_SYS_MMC_ENV_DEV:
 370
 371           Specifies which MMC device the environment is stored in.
 372
 373           CONFIG_SYS_MMC_ENV_PART (optional):
 374
 375           Specifies which MMC partition the environment is stored in. If not
 376           set, defaults to partition 0, the user area. Common values might be
 377           1 (first MMC boot partition), 2 (second MMC boot partition).
 378
 379           CONFIG_ENV_OFFSET:
 380           CONFIG_ENV_SIZE:
 381
 382           These two #defines specify the offset and size of the environment
 383           area within the specified MMC device.
 384
 385           If offset is positive (the usual case), it is treated as relative to
 386           the start of the MMC partition. If offset is negative, it is treated
 387           as relative to the end of the MMC partition. This can be useful if
 388           your board may be fitted with different MMC devices, which have
 389           different sizes for the MMC partitions, and you always want the
 390           environment placed at the very end of the partition, to leave the
 391           maximum possible space before it, to store other data.
 392
 393           These two values are in units of bytes, but must be aligned to an
 394           MMC sector boundary.
 395
 396           CONFIG_ENV_OFFSET_REDUND (optional):
 397
 398           Specifies a second storage area, of CONFIG_ENV_SIZE size, used to
 399           hold a redundant copy of the environment data. This provides a
 400           valid backup copy in case the other copy is corrupted, e.g. due
 401           to a power failure during a "saveenv" operation.
 402
 403           This value may also be positive or negative; this is handled in the
 404           same way as CONFIG_ENV_OFFSET.
 405
 406           This value is also in units of bytes, but must also be aligned to
 407           an MMC sector boundary.
 408
 409           CONFIG_ENV_SIZE_REDUND (optional):
 410
 411           This value need not be set, even when CONFIG_ENV_OFFSET_REDUND is
 412           set. If this value is set, it must be set to the same value as
 413           CONFIG_ENV_SIZE.
 414
 415 config ENV_IS_IN_NAND
 416         bool "Environment in a NAND device"
 417         depends on !CHAIN_OF_TRUST
 418         help
 419           Define this if you have a NAND device which you want to use for the
 420           environment.
 421
 422           - CONFIG_ENV_OFFSET:
 423           - CONFIG_ENV_SIZE:
 424
 425           These two #defines specify the offset and size of the environment
 426           area within the first NAND device.  CONFIG_ENV_OFFSET must be
 427           aligned to an erase block boundary.
 428
 429           - CONFIG_ENV_OFFSET_REDUND (optional):
 430
 431           This setting describes a second storage area of CONFIG_ENV_SIZE
 432           size used to hold a redundant copy of the environment data, so
 433           that there is a valid backup copy in case there is a power failure
 434           during a "saveenv" operation.  CONFIG_ENV_OFFSET_REDUND must be
 435           aligned to an erase block boundary.
 436
 437           - CONFIG_ENV_RANGE (optional):
 438
 439           Specifies the length of the region in which the environment
 440           can be written.  This should be a multiple of the NAND device's
 441           block size.  Specifying a range with more erase blocks than
 442           are needed to hold CONFIG_ENV_SIZE allows bad blocks within
 443           the range to be avoided.
 444
 445           - CONFIG_ENV_OFFSET_OOB (optional):
 446
 447           Enables support for dynamically retrieving the offset of the
 448           environment from block zero's out-of-band data.  The
 449           "nand env.oob" command can be used to record this offset.
 450           Currently, CONFIG_ENV_OFFSET_REDUND is not supported when
 451           using CONFIG_ENV_OFFSET_OOB.
 452
 453 config ENV_IS_IN_NVRAM
 454         bool "Environment in a non-volatile RAM"
 455         depends on !CHAIN_OF_TRUST
 456         help
 457           Define this if you have some non-volatile memory device
 458           (NVRAM, battery buffered SRAM) which you want to use for the
 459           environment.
 460
 461           - CONFIG_ENV_ADDR:
 462           - CONFIG_ENV_SIZE:
 463
 464           These two #defines are used to determine the memory area you
 465           want to use for environment. It is assumed that this memory
 466           can just be read and written to, without any special
 467           provision.
 468
 469 config ENV_IS_IN_REMOTE
 470         bool "Environment is in remove memory space"
 471         depends on !CHAIN_OF_TRUST
 472         help
 473           Define this if you have a remote memory space which you
 474           want to use for the local device's environment.
 475
 476           - CONFIG_ENV_ADDR:
 477           - CONFIG_ENV_SIZE:
 478
 479           These two #defines specify the address and size of the
 480           environment area within the remote memory space. The
 481           local device can get the environment from remote memory
 482           space by SRIO or PCIE links.
 483
 484 config ENV_IS_IN_SPI_FLASH
 485         bool "Environment is in SPI flash"
 486         depends on !CHAIN_OF_TRUST
 487         help
 488           Define this if you have a SPI Flash memory device which you
 489           want to use for the environment.
 490
 491           - CONFIG_ENV_OFFSET:
 492           - CONFIG_ENV_SIZE:
 493
 494           These two #defines specify the offset and size of the
 495           environment area within the SPI Flash. CONFIG_ENV_OFFSET must be
 496           aligned to an erase sector boundary.
 497
 498           - CONFIG_ENV_SECT_SIZE:
 499
 500           Define the SPI flash's sector size.
 501
 502           - CONFIG_ENV_OFFSET_REDUND (optional):
 503
 504           This setting describes a second storage area of CONFIG_ENV_SIZE
 505           size used to hold a redundant copy of the environment data, so
 506           that there is a valid backup copy in case there is a power failure
 507           during a "saveenv" operation. CONFIG_ENV_OFFSET_REDUND must be
 508           aligned to an erase sector boundary.
 509
 510           - CONFIG_ENV_SPI_BUS (optional):
 511           - CONFIG_ENV_SPI_CS (optional):
 512
 513           Define the SPI bus and chip select. If not defined they will be 0.
 514
 515           - CONFIG_ENV_SPI_MAX_HZ (optional):
 516
 517           Define the SPI max work clock. If not defined then use 1MHz.
 518
 519           - CONFIG_ENV_SPI_MODE (optional):
 520
 521           Define the SPI work mode. If not defined then use SPI_MODE_3.
 522
 523 config ENV_IS_IN_UBI
 524         bool "Environment in a UBI volume"
 525         depends on !CHAIN_OF_TRUST
 526         help
 527           Define this if you have an UBI volume that you want to use for the
 528           environment.  This has the benefit of wear-leveling the environment
 529           accesses, which is important on NAND.
 530
 531           - CONFIG_ENV_UBI_PART:
 532
 533           Define this to a string that is the mtd partition containing the UBI.
 534
 535           - CONFIG_ENV_UBI_VOLUME:
 536
 537           Define this to the name of the volume that you want to store the
 538           environment in.
 539
 540           - CONFIG_ENV_UBI_VOLUME_REDUND:
 541
 542           Define this to the name of another volume to store a second copy of
 543           the environment in.  This will enable redundant environments in UBI.
 544           It is assumed that both volumes are in the same MTD partition.
 545
 546           - CONFIG_UBI_SILENCE_MSG
 547           - CONFIG_UBIFS_SILENCE_MSG
 548
 549           You will probably want to define these to avoid a really noisy system
 550           when storing the env in UBI.
 551
 552 config ENV_IS_NOWHERE
 553         bool "Environment is not stored"
 554         help
 555           Define this if you don't want to or can't have an environment stored
 556           on a storage medium
 557
 558 if ARCH_SUNXI
 559
 560 config ENV_OFFSET
 561         hex "Environment Offset"
 562         depends on !ENV_IS_IN_UBI
 563         depends on !ENV_IS_NOWHERE
 564         default 0x88000 if ARCH_SUNXI
 565         help
 566           Offset from the start of the device (or partition)
 567
 568 config ENV_SIZE
 569         hex "Environment Size"
 570         depends on !ENV_IS_NOWHERE
 571         default 0x20000 if ARCH_SUNXI
 572         help
 573           Size of the environment storage area
 574
 575 config ENV_UBI_PART
 576         string "UBI partition name"
 577         depends on ENV_IS_IN_UBI
 578         help
 579           MTD partition containing the UBI device
 580
 581 config ENV_UBI_VOLUME
 582         string "UBI volume name"
 583         depends on ENV_IS_IN_UBI
 584         help
 585           Name of the volume that you want to store the environment in.
 586
 587 endif
 588
 589 endmenu
 590
 591 config BOOTDELAY
 592         int "delay in seconds before automatically booting"
 593         default 2
 594         depends on AUTOBOOT
 595         help
 596           Delay before automatically running bootcmd;
 597           set to 0 to autoboot with no delay, but you can stop it by key input.
 598           set to -1 to disable autoboot.
 599           set to -2 to autoboot with no delay and not check for abort
 600
 601           See doc/README.autoboot for details.
 602
 603 menu "Console"
 604
 605 config MENU
 606         bool
 607         help
 608           This is the library functionality to provide a text-based menu of
 609           choices for the user to make choices with.
 610
 611 config CONSOLE_RECORD
 612         bool "Console recording"
 613         help
 614           This provides a way to record console output (and provide console
 615           input) through circular buffers. This is mostly useful for testing.
 616           Console output is recorded even when the console is silent.
 617           To enable console recording, call console_record_reset_enable()
 618           from your code.
 619
 620 config CONSOLE_RECORD_OUT_SIZE
 621         hex "Output buffer size"
 622         depends on CONSOLE_RECORD
 623         default 0x400 if CONSOLE_RECORD
 624         help
 625           Set the size of the console output buffer. When this fills up, no
 626           more data will be recorded until some is removed. The buffer is
 627           allocated immediately after the malloc() region is ready.
 628
 629 config CONSOLE_RECORD_IN_SIZE
 630         hex "Input buffer size"
 631         depends on CONSOLE_RECORD
 632         default 0x100 if CONSOLE_RECORD
 633         help
 634           Set the size of the console input buffer. When this contains data,
 635           tstc() and getc() will use this in preference to real device input.
 636           The buffer is allocated immediately after the malloc() region is
 637           ready.
 638
 639 config IDENT_STRING
 640         string "Board specific string to be added to uboot version string"
 641         help
 642           This options adds the board specific name to u-boot version.
 643
 644 config SILENT_CONSOLE
 645         bool "Support a silent console"
 646         help
 647           This option allows the console to be silenced, meaning that no
 648           output will appear on the console devices. This is controlled by
 649           setting the environment vaariable 'silent' to a non-empty value.
 650           Note this also silences the console when booting Linux.
 651
 652           When the console is set up, the variable is checked, and the
 653           GD_FLG_SILENT flag is set. Changing the environment variable later
 654           will update the flag.
 655
 656 config SILENT_U_BOOT_ONLY
 657         bool "Only silence the U-Boot console"
 658         depends on SILENT_CONSOLE
 659         help
 660           Normally when the U-Boot console is silenced, Linux's console is
 661           also silenced (assuming the board boots into Linux). This option
 662           allows the linux console to operate normally, even if U-Boot's
 663           is silenced.
 664
 665 config SILENT_CONSOLE_UPDATE_ON_SET
 666         bool "Changes to the 'silent' environment variable update immediately"
 667         depends on SILENT_CONSOLE
 668         default y if SILENT_CONSOLE
 669         help
 670           When the 'silent' environment variable is changed, update the
 671           console silence flag immediately. This allows 'setenv' to be used
 672           to silence or un-silence the console.
 673
 674           The effect is that any change to the variable will affect the
 675           GD_FLG_SILENT flag.
 676
 677 config SILENT_CONSOLE_UPDATE_ON_RELOC
 678         bool "Allow flags to take effect on relocation"
 679         depends on SILENT_CONSOLE
 680         help
 681           In some cases the environment is not available until relocation
 682           (e.g. NAND). This option makes the value of the 'silent'
 683           environment variable take effect at relocation.
 684
 685 config PRE_CONSOLE_BUFFER
 686         bool "Buffer characters before the console is available"
 687         help
 688           Prior to the console being initialised (i.e. serial UART
 689           initialised etc) all console output is silently discarded.
 690           Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to
 691           buffer any console messages prior to the console being
 692           initialised to a buffer. The buffer is a circular buffer, so
 693           if it overflows, earlier output is discarded.
 694
 695           Note that this is not currently supported in SPL. It would be
 696           useful to be able to share the pre-console buffer with SPL.
 697
 698 config PRE_CON_BUF_SZ
 699         int "Sets the size of the pre-console buffer"
 700         depends on PRE_CONSOLE_BUFFER
 701         default 4096
 702         help
 703           The size of the pre-console buffer affects how much console output
 704           can be held before it overflows and starts discarding earlier
 705           output. Normally there is very little output at this early stage,
 706           unless debugging is enabled, so allow enough for ~10 lines of
 707           text.
 708
 709           This is a useful feature if you are using a video console and
 710           want to see the full boot output on the console. Without this
 711           option only the post-relocation output will be displayed.
 712
 713 config PRE_CON_BUF_ADDR
 714         hex "Address of the pre-console buffer"
 715         depends on PRE_CONSOLE_BUFFER
 716         default 0x2f000000 if ARCH_SUNXI && MACH_SUN9I
 717         default 0x4f000000 if ARCH_SUNXI && !MACH_SUN9I
 718         help
 719           This sets the start address of the pre-console buffer. This must
 720           be in available memory and is accessed before relocation and
 721           possibly before DRAM is set up. Therefore choose an address
 722           carefully.
 723
 724           We should consider removing this option and allocating the memory
 725           in board_init_f_init_reserve() instead.
 726
 727 config CONSOLE_MUX
 728         bool "Enable console multiplexing"
 729         default y if DM_VIDEO || VIDEO || LCD
 730         help
 731           This allows multiple devices to be used for each console 'file'.
 732           For example, stdout can be set to go to serial and video.
 733           Similarly, stdin can be set to come from serial and keyboard.
 734           Input can be provided from either source. Console multiplexing
 735           adds a small amount of size to U-Boot.  Changes to the environment
 736           variables stdout, stdin and stderr will take effect immediately.
 737
 738 config SYS_CONSOLE_IS_IN_ENV
 739         bool "Select console devices from the environment"
 740         default y if CONSOLE_MUX
 741         help
 742           This allows multiple input/output devices to be set at boot time.
 743           For example, if stdout is set to "serial,video" then output will
 744           be sent to both the serial and video devices on boot. The
 745           environment variables can be updated after boot to change the
 746           input/output devices.
 747
 748 config SYS_CONSOLE_OVERWRITE_ROUTINE
 749         bool "Allow board control over console overwriting"
 750         help
 751           If this is enabled, and the board-specific function
 752           overwrite_console() returns 1, the stdin, stderr and stdout are
 753           switched to the serial port, else the settings in the environment
 754           are used. If this is not enabled, the console will not be switched
 755           to serial.
 756
 757 config SYS_CONSOLE_ENV_OVERWRITE
 758         bool "Update environment variables during console init"
 759         help
 760           The console environment variables (stdout, stdin, stderr) can be
 761           used to determine the correct console devices on start-up. This
 762           option writes the console devices to these variables on console
 763           start-up (after relocation). This causes the environment to be
 764           updated to match the console devices actually chosen.
 765
 766 config SYS_CONSOLE_INFO_QUIET
 767         bool "Don't display the console devices on boot"
 768         help
 769           Normally U-Boot displays the current settings for stdout, stdin
 770           and stderr on boot when the post-relocation console is set up.
 771           Enable this option to supress this output. It can be obtained by
 772           calling stdio_print_current_devices() from board code.
 773
 774 config SYS_STDIO_DEREGISTER
 775         bool "Allow deregistering stdio devices"
 776         default y if USB_KEYBOARD
 777         help
 778           Generally there is no need to deregister stdio devices since they
 779           are never deactivated. But if a stdio device is used which can be
 780           removed (for example a USB keyboard) then this option can be
 781           enabled to ensure this is handled correctly.
 782
 783 endmenu
 784
 785 config DTB_RESELECT
 786         bool "Support swapping dtbs at a later point in boot"
 787         depends on FIT_EMBED
 788         help
 789           It is possible during initial boot you may need to use a generic
 790           dtb until you can fully determine the board your running on. This
 791           config allows boards to implement a function at a later point
 792           during boot to switch to the "correct" dtb.
 793
 794 config FIT_EMBED
 795         bool "Support a FIT image embedded in the U-boot image"
 796         help
 797           This option provides hooks to allow U-boot to parse an
 798           appended FIT image and enable board specific code to then select
 799           the correct DTB to be used.
 800
 801 config DEFAULT_FDT_FILE
 802         string "Default fdt file"
 803         help
 804           This option is used to set the default fdt file to boot OS.
 805
 806 config VERSION_VARIABLE
 807         bool "add U-Boot environment variable vers"
 808         default n
 809         help
 810           If this variable is defined, an environment variable
 811           named "ver" is created by U-Boot showing the U-Boot
 812           version as printed by the "version" command.
 813           Any change to this variable will be reverted at the
 814           next reset.
 815
 816 config BOARD_LATE_INIT
 817         bool
 818         help
 819           Sometimes board require some initialization code that might
 820           require once the actual init done, example saving board specific env,
 821           boot-modes etc. which eventually done at late.
 822
 823           So this config enable the late init code with the help of board_late_init
 824           function which should defined on respective boards.
 825
 826 config DISPLAY_CPUINFO
 827         bool "Display information about the CPU during start up"
 828         default y if ARM || NIOS2 || X86 || XTENSA
 829         help
 830           Display information about the CPU that U-Boot is running on
 831           when U-Boot starts up. The function print_cpuinfo() is called
 832           to do this.
 833
 834 config DISPLAY_BOARDINFO
 835         bool "Display information about the board during start up"
 836         default y if ARM || M68K || MIPS || PPC || SANDBOX || XTENSA
 837         help
 838           Display information about the board that U-Boot is running on
 839           when U-Boot starts up. The board function checkboard() is called
 840           to do this.
 841
 842 menu "Start-up hooks"
 843
 844 config ARCH_EARLY_INIT_R
 845         bool "Call arch-specific init soon after relocation"
 846         default y if X86
 847         help
 848           With this option U-Boot will call arch_early_init_r() soon after
 849           relocation. Driver model is running by this point, and the cache
 850           is on. Note that board_early_init_r() is called first, if
 851           enabled. This can be used to set up architecture-specific devices.
 852
 853 config ARCH_MISC_INIT
 854         bool "Call arch-specific init after relocation, when console is ready"
 855         help
 856           With this option U-Boot will call arch_misc_init() after
 857           relocation to allow miscellaneous arch-dependent initialisation
 858           to be performed. This function should be defined by the board
 859           and will be called after the console is set up, after relocaiton.
 860
 861 config BOARD_EARLY_INIT_F
 862         bool "Call board-specific init before relocation"
 863         default y if X86
 864         help
 865           Some boards need to perform initialisation as soon as possible
 866           after boot. With this option, U-Boot calls board_early_init_f()
 867           after driver model is ready in the pre-relocation init sequence.
 868           Note that the normal serial console is not yet set up, but the
 869           debug UART will be available if enabled.
 870
 871 endmenu
 872
 873 menu "Security support"
 874
 875 config HASH
 876         bool # "Support hashing API (SHA1, SHA256, etc.)"
 877         help
 878           This provides a way to hash data in memory using various supported
 879           algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
 880           and the algorithms it supports are defined in common/hash.c. See
 881           also CMD_HASH for command-line access.
 882
 883 endmenu
 884
 885 source "common/spl/Kconfig"