common/spl/Kconfig

   1 menu "SPL / TPL"
   2
   3 config SUPPORT_SPL
   4         bool
   5
   6 config SUPPORT_TPL
   7         bool
   8
   9 config SPL_DFU_NO_RESET
  10         bool
  11
  12 config SPL
  13         bool
  14         depends on SUPPORT_SPL
  15         prompt "Enable SPL"
  16         help
  17           If you want to build SPL as well as the normal image, say Y.
  18
  19 config SPL_FRAMEWORK
  20         bool "Support SPL based upon the common SPL framework"
  21         depends on SPL
  22         default y
  23         help
  24           Enable the SPL framework under common/spl/.  This framework
  25           supports MMC, NAND and YMODEM and other methods loading of U-Boot
  26           and the Linux Kernel.  If unsure, say Y.
  27
  28 config SPL_FRAMEWORK_BOARD_INIT_F
  29         bool "Define a generic function board_init_f"
  30         depends on SPL_FRAMEWORK
  31         help
  32           Define a generic function board_init_f that:
  33           - initialize the spl (spl_early_init)
  34           - initialize the serial (preloader_console_init)
  35           Unless you want to provide your own board_init_f, you should say Y.
  36
  37 config SPL_SIZE_LIMIT
  38         hex "Maximum size of SPL image"
  39         depends on SPL
  40         default 69632 if ARCH_MX6 && !MX6_OCRAM_256KB
  41         default 200704 if ARCH_MX6 && MX6_OCRAM_256KB
  42         default 0
  43         help
  44           Specifies the maximum length of the U-Boot SPL image.
  45           If this value is zero, it is ignored.
  46
  47 config SPL_SIZE_LIMIT_SUBTRACT_GD
  48         bool "SPL image size check: provide space for global data"
  49         depends on SPL_SIZE_LIMIT > 0
  50         help
  51           If enabled, aligned size of global data is reserved in
  52           SPL_SIZE_LIMIT check to ensure such an image does not overflow SRAM
  53           if SPL_SIZE_LIMIT describes the size of SRAM available for SPL when
  54           pre-reloc global data is put into this SRAM, too.
  55
  56 config SPL_SIZE_LIMIT_SUBTRACT_MALLOC
  57         bool "SPL image size check: provide space for malloc() pool before relocation"
  58         depends on SPL_SIZE_LIMIT > 0
  59         help
  60           If enabled, SPL_SYS_MALLOC_F_LEN is reserved in SPL_SIZE_LIMIT check
  61           to ensure such an image does not overflow SRAM if SPL_SIZE_LIMIT
  62           describes the size of SRAM available for SPL when pre-reloc malloc
  63           pool is put into this SRAM, too.
  64
  65 config SPL_SIZE_LIMIT_PROVIDE_STACK
  66         hex "SPL image size check: provide stack space before relocation"
  67         depends on SPL_SIZE_LIMIT > 0
  68         default 0
  69         help
  70           If set, this size is reserved in SPL_SIZE_LIMIT check to ensure such
  71           an image does not overflow SRAM if SPL_SIZE_LIMIT describes the size
  72           of SRAM available for SPL when the stack required before reolcation
  73           uses this SRAM, too.
  74
  75 config SPL_SYS_STACK_F_CHECK_BYTE
  76         hex
  77         default 0xaa
  78         help
  79           Constant used to check the stack
  80
  81 config SPL_SYS_REPORT_STACK_F_USAGE
  82         depends on SPL_SIZE_LIMIT_PROVIDE_STACK != 0
  83         bool "Check and report stack usage in SPL before relocation"
  84         help
  85           If this option is enabled, the initial SPL stack is filled with 0xaa
  86           very early, up to the size configured with
  87           SPL_SIZE_LIMIT_PROVIDE_STACK.
  88           Later when SPL is done using this initial stack and switches to a
  89           stack in DRAM, the actually used size of this initial stack is
  90           reported by examining the memory and searching for the lowest
  91           occurrence of non 0xaa bytes.
  92           This default implementation works for stacks growing down only.
  93
  94 menu "PowerPC SPL Boot options"
  95         depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
  96
  97 config SPL_NAND_BOOT
  98         bool "Load SPL from NAND flash"
  99
 100 config SPL_MMC_BOOT
 101         bool "Load SPL from SD Card / eMMC"
 102
 103 config SPL_SPI_BOOT
 104         bool "Load SPL from SPI flash"
 105
 106 config SPL_FSL_PBL
 107         bool "Create SPL in Freescale PBI format"
 108         help
 109           Create boot binary having SPL binary in PBI format concatenated with
 110           u-boot binary.
 111
 112 endmenu
 113
 114 config HANDOFF
 115         bool "Pass hand-off information from SPL to U-Boot proper"
 116         depends on BLOBLIST
 117         help
 118           It is useful to be able to pass information from SPL to U-Boot
 119           proper to preserve state that is known in SPL and is needed in U-Boot.
 120           Enable this to locate the handoff information in U-Boot proper, early
 121           in boot. It is available in gd->handoff. The state state is set up
 122           in SPL (or TPL if that is being used).
 123
 124 if SPL
 125
 126 config SPL_HANDOFF
 127         bool "Pass hand-off information from SPL to U-Boot proper"
 128         depends on HANDOFF && SPL_BLOBLIST
 129         default y
 130         help
 131           This option enables SPL to write handoff information. This can be
 132           used to pass information like the size of SDRAM from SPL to U-Boot
 133           proper. Also SPL can receive information from TPL in the same place
 134           if that is enabled.
 135
 136 config SPL_LDSCRIPT
 137         string "Linker script for the SPL stage"
 138         default "arch/$(ARCH)/cpu/u-boot-spl.lds"
 139         help
 140           The SPL stage will usually require a different linker-script
 141           (as it runs from a different memory region) than the regular
 142           U-Boot stage.  Set this to the path of the linker-script to
 143           be used for SPL.
 144
 145 config SPL_TEXT_BASE
 146         hex "SPL Text Base"
 147         default ISW_ENTRY_ADDR if AM43XX || AM33XX || OMAP54XX || ARCH_KEYSTONE
 148         default 0x10060 if MACH_SUN50I || MACH_SUN50I_H5 || MACH_SUN9I
 149         default 0x20060 if MACH_SUN50I_H6
 150         default 0x00060 if ARCH_SUNXI
 151         default 0xfffc0000 if ARCH_ZYNQMP
 152         default 0x0
 153         help
 154           The address in memory that SPL will be running from.
 155
 156 config SPL_BOARD_INIT
 157         bool "Call board-specific initialization in SPL"
 158         help
 159           If this option is enabled, U-Boot will call the function
 160           spl_board_init() from board_init_r(). This function should be
 161           provided by the board.
 162
 163 config SPL_BOOTROM_SUPPORT
 164         bool "Support returning to the BOOTROM"
 165         help
 166           Some platforms (e.g. the Rockchip RK3368) provide support in their
 167           ROM for loading the next boot-stage after performing basic setup
 168           from the SPL stage.
 169
 170           Enable this option, to return to the BOOTROM through the
 171           BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
 172           boot device list, if not implemented for a given board)
 173
 174 config SPL_BOOTCOUNT_LIMIT
 175         bool "Support bootcount in SPL"
 176         depends on SPL_ENV_SUPPORT
 177         help
 178           On some boards, which use 'falcon' mode, it is necessary to check
 179           and increment the number of boot attempts. Such boards do not
 180           use proper U-Boot for normal boot flow and hence needs those
 181           adjustments to be done in the SPL.
 182
 183 config SPL_RAW_IMAGE_SUPPORT
 184         bool "Support SPL loading and booting of RAW images"
 185         default n if (ARCH_MX6 && (SPL_MMC_SUPPORT || SPL_SATA_SUPPORT))
 186         default y if !TI_SECURE_DEVICE
 187         help
 188           SPL will support loading and booting a RAW image when this option
 189           is y. If this is not set, SPL will move on to other available
 190           boot media to find a suitable image.
 191
 192 config SPL_LEGACY_IMAGE_SUPPORT
 193         bool "Support SPL loading and booting of Legacy images"
 194         default y if !TI_SECURE_DEVICE && !SPL_LOAD_FIT
 195         help
 196           SPL will support loading and booting Legacy images when this option
 197           is y. If this is not set, SPL will move on to other available
 198           boot media to find a suitable image.
 199
 200 config SPL_LEGACY_IMAGE_CRC_CHECK
 201         bool "Check CRC of Legacy images"
 202         depends on SPL_LEGACY_IMAGE_SUPPORT
 203         select SPL_CRC32_SUPPORT
 204         help
 205           Enable this to check the CRC of Legacy images. While this increases
 206           reliability, it affects both code size and boot duration.
 207           If disabled, Legacy images are booted if the image magic and size
 208           are correct, without further integrity checks.
 209
 210 config SPL_SYS_MALLOC_SIMPLE
 211         bool
 212         prompt "Only use malloc_simple functions in the SPL"
 213         help
 214           Say Y here to only use the *_simple malloc functions from
 215           malloc_simple.c, rather then using the versions from dlmalloc.c;
 216           this will make the SPL binary smaller at the cost of more heap
 217           usage as the *_simple malloc functions do not re-use free-ed mem.
 218
 219 config TPL_SYS_MALLOC_SIMPLE
 220         bool
 221         prompt "Only use malloc_simple functions in the TPL"
 222         depends on TPL
 223         help
 224           Say Y here to only use the *_simple malloc functions from
 225           malloc_simple.c, rather then using the versions from dlmalloc.c;
 226           this will make the TPL binary smaller at the cost of more heap
 227           usage as the *_simple malloc functions do not re-use free-ed mem.
 228
 229 config SPL_STACK_R
 230         bool "Enable SDRAM location for SPL stack"
 231         help
 232           SPL starts off execution in SRAM and thus typically has only a small
 233           stack available. Since SPL sets up DRAM while in its board_init_f()
 234           function, it is possible for the stack to move there before
 235           board_init_r() is reached. This option enables a special SDRAM
 236           location for the SPL stack. U-Boot SPL switches to this after
 237           board_init_f() completes, and before board_init_r() starts.
 238
 239 config SPL_STACK_R_ADDR
 240         depends on SPL_STACK_R
 241         hex "SDRAM location for SPL stack"
 242         default 0x82000000 if ARCH_OMAP2PLUS
 243         help
 244           Specify the address in SDRAM for the SPL stack. This will be set up
 245           before board_init_r() is called.
 246
 247 config SPL_STACK_R_MALLOC_SIMPLE_LEN
 248         depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
 249         hex "Size of malloc_simple heap after switching to DRAM SPL stack"
 250         default 0x100000
 251         help
 252           Specify the amount of the stack to use as memory pool for
 253           malloc_simple after switching the stack to DRAM. This may be set
 254           to give board_init_r() a larger heap then the initial heap in
 255           SRAM which is limited to SYS_MALLOC_F_LEN bytes.
 256
 257 config SPL_SEPARATE_BSS
 258         bool "BSS section is in a different memory region from text"
 259         help
 260           Some platforms need a large BSS region in SPL and can provide this
 261           because RAM is already set up. In this case BSS can be moved to RAM.
 262           This option should then be enabled so that the correct device tree
 263           location is used. Normally we put the device tree at the end of BSS
 264           but with this option enabled, it goes at _image_binary_end.
 265
 266 config SPL_BANNER_PRINT
 267         bool "Enable output of the SPL banner 'U-Boot SPL ...'"
 268         default y
 269         help
 270           If this option is enabled, SPL will print the banner with version
 271           info. Disabling this option could be useful to reduce TPL boot time
 272           (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
 273
 274 config TPL_BANNER_PRINT
 275         bool "Enable output of the TPL banner 'U-Boot TPL ...'"
 276         depends on TPL
 277         default y
 278         help
 279           If this option is enabled, SPL will not print the banner with version
 280           info. Disabling this option could be useful to reduce SPL boot time
 281           (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
 282
 283 config SPL_EARLY_BSS
 284         depends on ARM && !ARM64
 285         bool "Allows initializing BSS early before entering board_init_f"
 286         help
 287           On some platform we have sufficient memory available early on to
 288           allow setting up and using a basic BSS prior to entering
 289           board_init_f. Activating this option will also de-activate the
 290           clearing of BSS during the SPL relocation process, thus allowing
 291           to carry state from board_init_f to board_init_r by way of BSS.
 292
 293 config SPL_DISPLAY_PRINT
 294         bool "Display a board-specific message in SPL"
 295         help
 296           If this option is enabled, U-Boot will call the function
 297           spl_display_print() immediately after displaying the SPL console
 298           banner ("U-Boot SPL ..."). This function should be provided by
 299           the board.
 300
 301 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
 302         bool "MMC raw mode: by sector"
 303         default y if ARCH_SUNXI || ARCH_DAVINCI || ARCH_UNIPHIER || \
 304                      ARCH_MX6 || ARCH_MX7 || \
 305                      ARCH_ROCKCHIP || ARCH_MVEBU ||  ARCH_SOCFPGA || \
 306                      ARCH_AT91 || ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || \
 307                      OMAP44XX || OMAP54XX || AM33XX || AM43XX
 308         help
 309           Use sector number for specifying U-Boot location on MMC/SD in
 310           raw mode.
 311
 312 config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
 313         hex "Address on the MMC to load U-Boot from"
 314         depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
 315         default 0x50 if ARCH_SUNXI
 316         default 0x75 if ARCH_DAVINCI
 317         default 0x8a if ARCH_MX6 || ARCH_MX7
 318         default 0x100 if ARCH_UNIPHIER
 319         default 0x140 if ARCH_MVEBU
 320         default 0x200 if ARCH_SOCFPGA || ARCH_AT91
 321         default 0x300 if ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || OMAP44XX || \
 322                          OMAP54XX || AM33XX || AM43XX || ARCH_K3
 323         default 0x4000 if ARCH_ROCKCHIP
 324         help
 325           Address on the MMC to load U-Boot from, when the MMC is being used
 326           in raw mode. Units: MMC sectors (1 sector = 512 bytes).
 327
 328 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
 329         bool "MMC Raw mode: by partition"
 330         help
 331           Use a partition for loading U-Boot when using MMC/SD in raw mode.
 332
 333 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
 334         hex "Partition to use to load U-Boot from"
 335         depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
 336         default 1
 337         help
 338           Partition on the MMC to load U-Boot from when the MMC is being
 339           used in raw mode
 340
 341 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
 342         bool "MMC raw mode: by partition type"
 343         depends on DOS_PARTITION && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
 344         help
 345           Use partition type for specifying U-Boot partition on MMC/SD in
 346           raw mode. U-Boot will be loaded from the first partition of this
 347           type to be found.
 348
 349 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
 350         hex "Partition Type on the MMC to load U-Boot from"
 351         depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
 352         help
 353           Partition Type on the MMC to load U-Boot from, when the MMC is being
 354           used in raw mode.
 355
 356 config SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
 357         bool "Override eMMC EXT_CSC_PART_CONFIG by user defined partition"
 358         depends on SUPPORT_EMMC_BOOT
 359         help
 360           eMMC boot partition is normally configured by the bits of the EXT_CSD
 361           register (EXT_CSC_PART_CONFIG), BOOT_PARTITION_ENABLE field. In some
 362           cases it might be required in SPL to load the image from different
 363           partition than the partition selected by EXT_CSC_PART_CONFIG register.
 364           Enable this option if you intend to use an eMMC boot partition other
 365           then selected via EXT_CSC_PART_CONFIG register and specify the custom
 366           partition number by the CONFIG_SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
 367           option.
 368
 369 config SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
 370         int "Number of the eMMC boot partition to use"
 371         depends on SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
 372         default 1
 373         help
 374           eMMC boot partition number to use when the eMMC in raw mode and
 375           the eMMC EXT_CSC_PART_CONFIG selection should be overridden in SPL
 376           by user defined partition number.
 377
 378 config SPL_CRC32_SUPPORT
 379         bool "Support CRC32"
 380         default y if SPL_LEGACY_IMAGE_SUPPORT
 381         help
 382           Enable this to support CRC32 in uImages or FIT images within SPL.
 383           This is a 32-bit checksum value that can be used to verify images.
 384           For FIT images, this is the least secure type of checksum, suitable
 385           for detected accidental image corruption. For secure applications you
 386           should consider SHA1 or SHA256.
 387
 388 config SPL_MD5_SUPPORT
 389         bool "Support MD5"
 390         depends on SPL_FIT
 391         help
 392           Enable this to support MD5 in FIT images within SPL. An MD5
 393           checksum is a 128-bit hash value used to check that the image
 394           contents have not been corrupted. Note that MD5 is not considered
 395           secure as it is possible (with a brute-force attack) to adjust the
 396           image while still retaining the same MD5 hash value. For secure
 397           applications where images may be changed maliciously, you should
 398           consider SHA1 or SHA256.
 399
 400 config SPL_SHA1_SUPPORT
 401         bool "Support SHA1"
 402         depends on SPL_FIT
 403         select SHA1
 404         help
 405           Enable this to support SHA1 in FIT images within SPL. A SHA1
 406           checksum is a 160-bit (20-byte) hash value used to check that the
 407           image contents have not been corrupted or maliciously altered.
 408           While SHA1 is fairly secure it is coming to the end of its life
 409           due to the expanding computing power available to brute-force
 410           attacks. For more security, consider SHA256.
 411
 412 config SPL_SHA256_SUPPORT
 413         bool "Support SHA256"
 414         depends on SPL_FIT
 415         select SHA256
 416         help
 417           Enable this to support SHA256 in FIT images within SPL. A SHA256
 418           checksum is a 256-bit (32-byte) hash value used to check that the
 419           image contents have not been corrupted. SHA256 is recommended for
 420           use in secure applications since (as at 2016) there is no known
 421           feasible attack that could produce a 'collision' with differing
 422           input data. Use this for the highest security. Note that only the
 423           SHA256 variant is supported: SHA512 and others are not currently
 424           supported in U-Boot.
 425
 426 config SPL_FIT_IMAGE_TINY
 427         bool "Remove functionality from SPL FIT loading to reduce size"
 428         depends on SPL_FIT
 429         default y if MACH_SUN50I || MACH_SUN50I_H5 || MACH_SUN50I_H6
 430         default y if ARCH_IMX8M
 431         help
 432           Enable this to reduce the size of the FIT image loading code
 433           in SPL, if space for the SPL binary is very tight.
 434
 435           This removes the detection of image types (which forces the
 436           first image to be treated as having a U-Boot style calling
 437           convention) and skips the recording of each loaded payload
 438           (i.e. loadable) into the FDT (modifying the loaded FDT to
 439           ensure this information is available to the next image
 440           invoked).
 441
 442 config SPL_CPU_SUPPORT
 443         bool "Support CPU drivers"
 444         help
 445           Enable this to support CPU drivers in SPL. These drivers can set
 446           up CPUs and provide information about them such as the model and
 447           name. This can be useful in SPL since setting up the CPUs earlier
 448           may improve boot performance. Enable this option to build the
 449           drivers in drivers/cpu as part of an SPL build.
 450
 451 config SPL_CRYPTO_SUPPORT
 452         bool "Support crypto drivers"
 453         help
 454           Enable crypto drivers in SPL. These drivers can be used to
 455           accelerate secure boot processing in secure applications. Enable
 456           this option to build the drivers in drivers/crypto as part of an
 457           SPL build.
 458
 459 config SPL_HASH_SUPPORT
 460         bool "Support hashing drivers"
 461         select SHA1
 462         select SHA256
 463         help
 464           Enable hashing drivers in SPL. These drivers can be used to
 465           accelerate secure boot processing in secure applications. Enable
 466           this option to build system-specific drivers for hash acceleration
 467           as part of an SPL build.
 468
 469 config TPL_HASH_SUPPORT
 470         bool "Support hashing drivers in TPL"
 471         depends on TPL
 472         select SHA1
 473         select SHA256
 474         help
 475           Enable hashing drivers in SPL. These drivers can be used to
 476           accelerate secure boot processing in secure applications. Enable
 477           this option to build system-specific drivers for hash acceleration
 478           as part of an SPL build.
 479
 480 config SPL_DMA_SUPPORT
 481         bool "Support DMA drivers"
 482         help
 483           Enable DMA (direct-memory-access) drivers in SPL. These drivers
 484           can be used to handle memory-to-peripheral data transfer without
 485           the CPU moving the data. Enable this option to build the drivers
 486           in drivers/dma as part of an SPL build.
 487
 488 config SPL_DRIVERS_MISC_SUPPORT
 489         bool "Support misc drivers"
 490         help
 491           Enable miscellaneous drivers in SPL. These drivers perform various
 492           tasks that don't fall nicely into other categories, Enable this
 493           option to build the drivers in drivers/misc as part of an SPL
 494           build, for those that support building in SPL (not all drivers do).
 495
 496 config SPL_ENV_SUPPORT
 497         bool "Support an environment"
 498         help
 499           Enable environment support in SPL. The U-Boot environment provides
 500           a number of settings (essentially name/value pairs) which can
 501           control many aspects of U-Boot's operation. Normally this is not
 502           needed in SPL as it has a much simpler task with less
 503           configuration. But some boards use this to support 'Falcon' boot
 504           on EXT2 and FAT, where SPL boots directly into Linux without
 505           starting U-Boot first. Enabling this option will make env_get()
 506           and env_set() available in SPL.
 507
 508 config SPL_SAVEENV
 509         bool "Support save environment"
 510         depends on SPL_ENV_SUPPORT
 511         select SPL_MMC_WRITE if ENV_IS_IN_MMC
 512         help
 513           Enable save environment support in SPL after setenv. By default
 514           the saveenv option is not provided in SPL, but some boards need
 515           this support in 'Falcon' boot, where SPL need to boot from
 516           different images based on environment variable set by OS. For
 517           example OS may set "reboot_image" environment variable to
 518           "recovery" inorder to boot recovery image by SPL. The SPL read
 519           "reboot_image" and act accordingly and change the reboot_image
 520           to default mode using setenv and save the environment.
 521
 522 config SPL_ETH_SUPPORT
 523         bool "Support Ethernet"
 524         depends on SPL_ENV_SUPPORT
 525         help
 526           Enable access to the network subsystem and associated Ethernet
 527           drivers in SPL. This permits SPL to load U-Boot over an Ethernet
 528           link rather than from an on-board peripheral. Environment support
 529           is required since the network stack uses a number of environment
 530           variables. See also SPL_NET_SUPPORT.
 531
 532 config SPL_FS_EXT4
 533         bool "Support EXT filesystems"
 534         help
 535           Enable support for EXT2/3/4 filesystems with SPL. This permits
 536           U-Boot (or Linux in Falcon mode) to be loaded from an EXT
 537           filesystem from within SPL. Support for the underlying block
 538           device (e.g. MMC or USB) must be enabled separately.
 539
 540 config SPL_FS_FAT
 541         bool "Support FAT filesystems"
 542         select FS_FAT
 543         help
 544           Enable support for FAT and VFAT filesystems with SPL. This
 545           permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
 546           filesystem from within SPL. Support for the underlying block
 547           device (e.g. MMC or USB) must be enabled separately.
 548
 549 config SPL_FAT_WRITE
 550         bool "Support write for FAT filesystems"
 551         help
 552           Enable write support for FAT and VFAT filesystems with SPL.
 553           Support for the underlying block device (e.g. MMC or USB) must be
 554           enabled separately.
 555
 556 config SPL_FPGA_SUPPORT
 557         bool "Support FPGAs"
 558         help
 559           Enable support for FPGAs in SPL. Field-programmable Gate Arrays
 560           provide software-configurable hardware which is typically used to
 561           implement peripherals (such as UARTs, LCD displays, MMC) or
 562           accelerate custom processing functions, such as image processing
 563           or machine learning. Sometimes it is useful to program the FPGA
 564           as early as possible during boot, and this option can enable that
 565           within SPL.
 566
 567 config SPL_GPIO_SUPPORT
 568         bool "Support GPIO in SPL"
 569         help
 570           Enable support for GPIOs (General-purpose Input/Output) in SPL.
 571           GPIOs allow U-Boot to read the state of an input line (high or
 572           low) and set the state of an output line. This can be used to
 573           drive LEDs, control power to various system parts and read user
 574           input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
 575           for example. Enable this option to build the drivers in
 576           drivers/gpio as part of an SPL build.
 577
 578 config SPL_I2C_SUPPORT
 579         bool "Support I2C"
 580         help
 581           Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
 582           I2C works with a clock and data line which can be driven by a
 583           one or more masters or slaves. It is a fairly complex bus but is
 584           widely used as it only needs two lines for communication. Speeds of
 585           400kbps are typical but up to 3.4Mbps is supported by some
 586           hardware. I2C can be useful in SPL to configure power management
 587           ICs (PMICs) before raising the CPU clock speed, for example.
 588           Enable this option to build the drivers in drivers/i2c as part of
 589           an SPL build.
 590
 591 config SPL_LIBCOMMON_SUPPORT
 592         bool "Support common libraries"
 593         help
 594           Enable support for common U-Boot libraries within SPL. These
 595           libraries include common code to deal with U-Boot images,
 596           environment and USB, for example. This option is enabled on many
 597           boards. Enable this option to build the code in common/ as part of
 598           an SPL build.
 599
 600 config SPL_LIBDISK_SUPPORT
 601         bool "Support disk partitions"
 602         select PARTITIONS
 603         help
 604           Enable support for disk partitions within SPL. 'Disk' is something
 605           of a misnomer as it includes non-spinning media such as flash (as
 606           used in MMC and USB sticks). Partitions provide a way for a disk
 607           to be split up into separate regions, with a partition table placed
 608           at the start or end which describes the location and size of each
 609           'partition'. These partitions are typically uses as individual block
 610           devices, typically with an EXT2 or FAT filesystem in each. This
 611           option enables whatever partition support has been enabled in
 612           U-Boot to also be used in SPL. It brings in the code in disk/.
 613
 614 config SPL_LIBGENERIC_SUPPORT
 615         bool "Support generic libraries"
 616         help
 617           Enable support for generic U-Boot libraries within SPL. These
 618           libraries include generic code to deal with device tree, hashing,
 619           printf(), compression and the like. This option is enabled on many
 620           boards. Enable this option to build the code in lib/ as part of an
 621           SPL build.
 622
 623 config SPL_DM_MAILBOX
 624         bool "Support Mailbox"
 625         help
 626           Enable support for Mailbox within SPL. This enable the inter
 627           processor communication protocols tobe used within SPL. Enable
 628           this option to build the drivers in drivers/mailbox as part of
 629           SPL build.
 630
 631 config SPL_MMC_SUPPORT
 632         bool "Support MMC"
 633         depends on MMC
 634         select HAVE_BLOCK_DEVICE
 635         help
 636           Enable support for MMC (Multimedia Card) within SPL. This enables
 637           the MMC protocol implementation and allows any enabled drivers to
 638           be used within SPL. MMC can be used with or without disk partition
 639           support depending on the application (SPL_LIBDISK_SUPPORT). Enable
 640           this option to build the drivers in drivers/mmc as part of an SPL
 641           build.
 642
 643 config SPL_FORCE_MMC_BOOT
 644         bool "Force SPL booting from MMC"
 645         depends on SPL_MMC_SUPPORT
 646         default n
 647         help
 648           Force SPL to use MMC device for Linux kernel booting even when the
 649           SoC ROM recognized boot medium is not eMMC/SD. This is crucial for
 650           factory or 'falcon mode' booting.
 651
 652 config SPL_MMC_TINY
 653         bool "Tiny MMC framework in SPL"
 654         depends on SPL_MMC_SUPPORT
 655         default n
 656         help
 657           Enable MMC framework tinification support. This option is useful if
 658           if your SPL is extremely size constrained. Heed the warning, enable
 659           this option if and only if you know exactly what you are doing, if
 660           you are reading this help text, you most likely have no idea :-)
 661
 662           The MMC framework is reduced to bare minimum to be useful. No malloc
 663           support is needed for the MMC framework operation with this option
 664           enabled. The framework supports exactly one MMC device and exactly
 665           one MMC driver. The MMC driver can be adjusted to avoid any malloc
 666           operations too, which can remove the need for malloc support in SPL
 667           and thus further reduce footprint.
 668
 669 config SPL_MMC_WRITE
 670         bool "MMC/SD/SDIO card support for write operations in SPL"
 671         depends on SPL_MMC_SUPPORT
 672         default n
 673         help
 674           Enable write access to MMC and SD Cards in SPL
 675
 676
 677 config SPL_MPC8XXX_INIT_DDR_SUPPORT
 678         bool "Support MPC8XXX DDR init"
 679         help
 680           Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
 681           random-access memory) on the MPC8XXX family within SPL. This
 682           allows DRAM to be set up before loading U-Boot into that DRAM,
 683           where it can run.
 684
 685 config SPL_MTD_SUPPORT
 686         bool "Support MTD drivers"
 687         help
 688           Enable support for MTD (Memory Technology Device) within SPL. MTD
 689           provides a block interface over raw NAND and can also be used with
 690           SPI flash. This allows SPL to load U-Boot from supported MTD
 691           devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
 692           to enable specific MTD drivers.
 693
 694 config SPL_MUSB_NEW_SUPPORT
 695         bool "Support new Mentor Graphics USB"
 696         help
 697           Enable support for Mentor Graphics USB in SPL. This is a new
 698           driver used by some boards. Enable this option to build
 699           the drivers in drivers/usb/musb-new as part of an SPL build. The
 700           old drivers are in drivers/usb/musb.
 701
 702 config SPL_NAND_SUPPORT
 703         bool "Support NAND flash"
 704         help
 705           Enable support for NAND (Negative AND) flash in SPL. NAND flash
 706           can be used to allow SPL to load U-Boot from supported devices.
 707           This enables the drivers in drivers/mtd/nand/raw as part of an SPL
 708           build.
 709
 710 config SPL_UBI
 711         bool "Support UBI"
 712         help
 713           Enable support for loading payloads from UBI. See
 714           README.ubispl for more info.
 715
 716 if SPL_DM
 717 config SPL_DM_SPI
 718         bool "Support SPI DM drivers in SPL"
 719         help
 720           Enable support for SPI DM drivers in SPL.
 721
 722 endif
 723 if SPL_UBI
 724 config SPL_UBI_LOAD_BY_VOLNAME
 725         bool "Support loading volumes by name"
 726         help
 727           This enables support for loading UBI volumes by name. When this
 728           is set, CONFIG_SPL_UBI_LOAD_MONITOR_VOLNAME can be used to
 729           configure the volume name from which to load U-Boot.
 730
 731 config SPL_UBI_MAX_VOL_LEBS
 732         int "Maximum number of LEBs per volume"
 733         depends on SPL_UBI
 734         help
 735           The maximum number of logical eraseblocks which a static volume
 736           to load can contain. Used for sizing the scan data structure.
 737
 738 config SPL_UBI_MAX_PEB_SIZE
 739         int "Maximum PEB size"
 740         depends on SPL_UBI
 741         help
 742           The maximum physical erase block size.
 743
 744 config SPL_UBI_MAX_PEBS
 745         int "Maximum number of PEBs"
 746         depends on SPL_UBI
 747         help
 748           The maximum physical erase block size. If not overridden by
 749           board code, this value will be used as the actual number of PEBs.
 750
 751 config SPL_UBI_PEB_OFFSET
 752         int "Offset to first UBI PEB"
 753         depends on SPL_UBI
 754         help
 755           The offset in number of PEBs from the start of flash to the first
 756           PEB part of the UBI image.
 757
 758 config SPL_UBI_VID_OFFSET
 759         int "Offset to VID header"
 760         depends on SPL_UBI
 761
 762 config SPL_UBI_LEB_START
 763         int "Offset to LEB in PEB"
 764         depends on SPL_UBI
 765         help
 766           The offset in bytes to the LEB within a PEB.
 767
 768 config SPL_UBI_INFO_ADDR
 769         hex "Address to place UBI scan info"
 770         depends on SPL_UBI
 771         help
 772           Address for ubispl to place the scan info. Read README.ubispl to
 773           determine the required size
 774
 775 config SPL_UBI_VOL_IDS
 776         int "Maximum volume id"
 777         depends on SPL_UBI
 778         help
 779           The maximum volume id which can be loaded. Used for sizing the
 780           scan data structure.
 781
 782 config SPL_UBI_LOAD_MONITOR_ID
 783         int "id of U-Boot volume"
 784         depends on SPL_UBI
 785         help
 786           The UBI volume id from which to load U-Boot
 787
 788 config SPL_UBI_LOAD_MONITOR_VOLNAME
 789         string "volume name of U-Boot volume"
 790         depends on SPL_UBI_LOAD_BY_VOLNAME
 791         help
 792           The UBI volume name from which to load U-Boot
 793
 794 config SPL_UBI_LOAD_KERNEL_ID
 795         int "id of kernel volume"
 796         depends on SPL_OS_BOOT && SPL_UBI
 797         help
 798           The UBI volume id from which to load the kernel
 799
 800 config SPL_UBI_LOAD_ARGS_ID
 801         int "id of kernel args volume"
 802         depends on SPL_OS_BOOT && SPL_UBI
 803         help
 804           The UBI volume id from which to load the device tree
 805
 806 config UBI_SPL_SILENCE_MSG
 807         bool "silence UBI SPL messages"
 808         default n
 809         help
 810           Disable messages from UBI SPL. This leaves warnings
 811           and errors enabled.
 812
 813 endif   # if SPL_UBI
 814
 815 config SPL_NET_SUPPORT
 816         bool "Support networking"
 817         help
 818           Enable support for network devices (such as Ethernet) in SPL.
 819           This permits SPL to load U-Boot over a network link rather than
 820           from an on-board peripheral. Environment support is required since
 821           the network stack uses a number of environment variables. See also
 822           SPL_ETH_SUPPORT.
 823
 824 if SPL_NET_SUPPORT
 825 config SPL_NET_VCI_STRING
 826         string "BOOTP Vendor Class Identifier string sent by SPL"
 827         help
 828           As defined by RFC 2132 the vendor class identifier field can be
 829           sent by the client to identify the vendor type and configuration
 830           of a client.  This is often used in practice to allow for the DHCP
 831           server to specify different files to load depending on if the ROM,
 832           SPL or U-Boot itself makes the request
 833 endif   # if SPL_NET_SUPPORT
 834
 835 config SPL_NO_CPU_SUPPORT
 836         bool "Drop CPU code in SPL"
 837         help
 838           This is specific to the ARM926EJ-S CPU. It disables the standard
 839           start.S start-up code, presumably so that a replacement can be
 840           used on that CPU. You should not enable it unless you know what
 841           you are doing.
 842
 843 config SPL_NOR_SUPPORT
 844         bool "Support NOR flash"
 845         help
 846           Enable support for loading U-Boot from memory-mapped NOR (Negative
 847           OR) flash in SPL. NOR flash is slow to write but fast to read, and
 848           a memory-mapped device makes it very easy to access. Loading from
 849           NOR is typically achieved with just a memcpy().
 850
 851 config SPL_XIP_SUPPORT
 852         bool "Support XIP"
 853         depends on SPL
 854         help
 855           Enable support for execute in place of U-Boot or kernel image. There
 856           is no need to copy image from flash to ram if flash supports execute
 857           in place. Its very useful in systems having enough flash but not
 858           enough ram to load the image.
 859
 860 config SPL_ONENAND_SUPPORT
 861         bool "Support OneNAND flash"
 862         help
 863           Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
 864           a type of NAND flash and therefore can be used to allow SPL to
 865           load U-Boot from supported devices. This enables the drivers in
 866           drivers/mtd/onenand as part of an SPL build.
 867
 868 config SPL_OS_BOOT
 869         bool "Activate Falcon Mode"
 870         depends on !TI_SECURE_DEVICE
 871         default n
 872         help
 873           Enable booting directly to an OS from SPL.
 874           for more info read doc/README.falcon
 875
 876 if SPL_OS_BOOT
 877 config SYS_OS_BASE
 878         hex "addr, where OS is found"
 879         depends on SPL_NOR_SUPPORT
 880         help
 881           Specify the address, where the OS image is found, which
 882           gets booted.
 883
 884 endif # SPL_OS_BOOT
 885
 886 config SPL_PAYLOAD
 887         string "SPL payload"
 888         default "tpl/u-boot-with-tpl.bin" if TPL
 889         default "u-boot.bin"
 890         help
 891           Payload for SPL boot. For backward compatibility, default to
 892           u-boot.bin, i.e. RAW image without any header. In case of
 893           TPL, tpl/u-boot-with-tpl.bin. For new boards, suggest to
 894           use u-boot.img.
 895
 896 config SPL_PCI
 897         bool "Support PCI drivers"
 898         help
 899           Enable support for PCI in SPL. For platforms that need PCI to boot,
 900           or must perform some init using PCI in SPL, this provides the
 901           necessary driver support. This enables the drivers in drivers/pci
 902           as part of an SPL build.
 903
 904 config SPL_PCH_SUPPORT
 905         bool "Support PCH drivers"
 906         help
 907           Enable support for PCH (Platform Controller Hub) devices in SPL.
 908           These are used to set up GPIOs and the SPI peripheral early in
 909           boot. This enables the drivers in drivers/pch as part of an SPL
 910           build.
 911
 912 config SPL_POST_MEM_SUPPORT
 913         bool "Support POST drivers"
 914         help
 915           Enable support for POST (Power-on Self Test) in SPL. POST is a
 916           procedure that checks that the hardware (CPU or board) appears to
 917           be functionally correctly. It is a sanity check that can be
 918           performed before booting. This enables the drivers in post/drivers
 919           as part of an SPL build.
 920
 921 config SPL_DM_RESET
 922         bool "Support reset drivers"
 923         depends on SPL
 924         help
 925           Enable support for reset control in SPL.
 926           That can be useful in SPL to handle IP reset in driver, as in U-Boot,
 927           by using the generic reset API provided by driver model.
 928           This enables the drivers in drivers/reset as part of an SPL build.
 929
 930 config SPL_POWER_SUPPORT
 931         bool "Support power drivers"
 932         help
 933           Enable support for power control in SPL. This includes support
 934           for PMICs (Power-management Integrated Circuits) and some of the
 935           features provided by PMICs. In particular, voltage regulators can
 936           be used to enable/disable power and vary its voltage. That can be
 937           useful in SPL to turn on boot peripherals and adjust CPU voltage
 938           so that the clock speed can be increased. This enables the drivers
 939           in drivers/power, drivers/power/pmic and drivers/power/regulator
 940           as part of an SPL build.
 941
 942 config SPL_POWER_DOMAIN
 943         bool "Support power domain drivers"
 944         help
 945           Enable support for power domain control in SPL. Many SoCs allow
 946           power to be applied to or removed from portions of the SoC (power
 947           domains). This may be used to save power. This API provides the
 948           means to control such power management hardware. This enables
 949           the drivers in drivers/power/domain as part of a SPL build.
 950
 951 config SPL_RAM_SUPPORT
 952         bool "Support booting from RAM"
 953         default y if MICROBLAZE || ARCH_SOCFPGA || TEGRA || ARCH_ZYNQ
 954         help
 955           Enable booting of an image in RAM. The image can be preloaded or
 956           it can be loaded by SPL directly into RAM (e.g. using USB).
 957
 958 config SPL_RAM_DEVICE
 959         bool "Support booting from preloaded image in RAM"
 960         depends on SPL_RAM_SUPPORT
 961         default y if MICROBLAZE || ARCH_SOCFPGA || TEGRA || ARCH_ZYNQ
 962         help
 963           Enable booting of an image already loaded in RAM. The image has to
 964           be already in memory when SPL takes over, e.g. loaded by the boot
 965           ROM.
 966
 967 config SPL_REMOTEPROC
 968         bool "Support REMOTEPROCS"
 969         help
 970           Enable support for REMOTEPROCs in SPL. This permits to load
 971           a remote processor firmware in SPL.
 972
 973 config SPL_RTC_SUPPORT
 974         bool "Support RTC drivers"
 975         help
 976           Enable RTC (Real-time Clock) support in SPL. This includes support
 977           for reading and setting the time. Some RTC devices also have some
 978           non-volatile (battery-backed) memory which is accessible if
 979           needed. This enables the drivers in drivers/rtc as part of an SPL
 980           build.
 981
 982 config SPL_SATA_SUPPORT
 983         bool "Support loading from SATA"
 984         help
 985           Enable support for SATA (Serial AT attachment) in SPL. This allows
 986           use of SATA devices such as hard drives and flash drivers for
 987           loading U-Boot. SATA is used in higher-end embedded systems and
 988           can provide higher performance than MMC , at somewhat higher
 989           expense and power consumption. This enables loading from SATA
 990           using a configured device.
 991
 992 config SPL_SATA_RAW_U_BOOT_USE_SECTOR
 993         bool "SATA raw mode: by sector"
 994         depends on SPL_SATA_SUPPORT
 995         help
 996           Use sector number for specifying U-Boot location on SATA disk in
 997           raw mode.
 998
 999 config SPL_SATA_RAW_U_BOOT_SECTOR
1000         hex "Sector on the SATA disk to load U-Boot from"
1001         depends on SPL_SATA_RAW_U_BOOT_USE_SECTOR
1002         help
1003           Sector on the SATA disk to load U-Boot from, when the SATA disk is being
1004           used in raw mode. Units: SATA disk sectors (1 sector = 512 bytes).
1005
1006 config SPL_SERIAL_SUPPORT
1007         bool "Support serial"
1008         select SPL_PRINTF
1009         select SPL_STRTO
1010         help
1011           Enable support for serial in SPL. This allows use of a serial UART
1012           for displaying messages while SPL is running. It also brings in
1013           printf() and panic() functions. This should normally be enabled
1014           unless there are space reasons not to. Even then, consider
1015           enabling SPL_USE_TINY_PRINTF which is a small printf() version.
1016
1017 config SPL_SPI_SUPPORT
1018         bool "Support SPI drivers"
1019         help
1020           Enable support for using SPI in SPL. This is used for connecting
1021           to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
1022           more details on that. The SPI driver provides the transport for
1023           data between the SPI flash and the CPU. This option can be used to
1024           enable SPI drivers that are needed for other purposes also, such
1025           as a SPI PMIC.
1026
1027 config SPL_SPI_FLASH_SUPPORT
1028         bool "Support SPI flash drivers"
1029         depends on SPL_SPI_SUPPORT
1030         help
1031           Enable support for using SPI flash in SPL, and loading U-Boot from
1032           SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
1033           the SPI bus that is used to connect it to a system. It is a simple
1034           but fast bidirectional 4-wire bus (clock, chip select and two data
1035           lines). This enables the drivers in drivers/mtd/spi as part of an
1036           SPL build. This normally requires SPL_SPI_SUPPORT.
1037
1038 if SPL_SPI_FLASH_SUPPORT
1039
1040 config SPL_SPI_FLASH_TINY
1041         bool "Enable low footprint SPL SPI Flash support"
1042         depends on !SPI_FLASH_BAR
1043         default y if SPI_FLASH
1044         help
1045          Enable lightweight SPL SPI Flash support that supports just reading
1046          data/images from flash. No support to write/erase flash. Enable
1047          this if you have SPL size limitations and don't need full
1048          fledged SPI flash support.
1049
1050 config SPL_SPI_FLASH_SFDP_SUPPORT
1051         bool "SFDP table parsing support for SPI NOR flashes"
1052         depends on !SPI_FLASH_BAR && !SPL_SPI_FLASH_TINY
1053         help
1054          Enable support for parsing and auto discovery of parameters for
1055          SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
1056          tables as per JESD216 standard in SPL.
1057
1058 config SPL_SPI_LOAD
1059         bool "Support loading from SPI flash"
1060         help
1061           Enable support for loading next stage, U-Boot or otherwise, from
1062           SPI NOR in U-Boot SPL.
1063
1064 endif # SPL_SPI_FLASH_SUPPORT
1065
1066 config SYS_SPI_U_BOOT_OFFS
1067         hex "address of u-boot payload in SPI flash"
1068         default 0x0
1069         depends on SPL_SPI_LOAD || SPL_SPI_SUNXI
1070         help
1071          Address within SPI-Flash from where the u-boot payload is fetched
1072          from.
1073
1074 config SPL_THERMAL
1075         bool "Driver support for thermal devices"
1076         help
1077           Enable support for temperature-sensing devices. Some SoCs have on-chip
1078           temperature sensors to permit warnings, speed throttling or even
1079           automatic power-off when the temperature gets too high or low. Other
1080           devices may be discrete but connected on a suitable bus.
1081
1082 config SPL_USB_HOST_SUPPORT
1083         bool "Support USB host drivers"
1084         select HAVE_BLOCK_DEVICE
1085         help
1086           Enable access to USB (Universal Serial Bus) host devices so that
1087           SPL can load U-Boot from a connected USB peripheral, such as a USB
1088           flash stick. While USB takes a little longer to start up than most
1089           buses, it is very flexible since many different types of storage
1090           device can be attached. This option enables the drivers in
1091           drivers/usb/host as part of an SPL build.
1092
1093 config SPL_USB_STORAGE
1094         bool "Support loading from USB"
1095         depends on SPL_USB_HOST_SUPPORT && !(BLK && !DM_USB)
1096         help
1097           Enable support for USB devices in SPL. This allows use of USB
1098           devices such as hard drives and flash drivers for loading U-Boot.
1099           The actual drivers are enabled separately using the normal U-Boot
1100           config options. This enables loading from USB using a configured
1101           device.
1102
1103 config SPL_USB_GADGET
1104         bool "Suppport USB Gadget drivers"
1105         help
1106           Enable USB Gadget API which allows to enable USB device functions
1107           in SPL.
1108
1109 if SPL_USB_GADGET
1110
1111 config SPL_USB_ETHER
1112         bool "Support USB Ethernet drivers"
1113         help
1114           Enable access to the USB network subsystem and associated
1115           drivers in SPL. This permits SPL to load U-Boot over a
1116           USB-connected Ethernet link (such as a USB Ethernet dongle) rather
1117           than from an onboard peripheral. Environment support is required
1118           since the network stack uses a number of environment variables.
1119           See also SPL_NET_SUPPORT and SPL_ETH_SUPPORT.
1120
1121 config SPL_DFU
1122         bool "Support DFU (Device Firmware Upgrade)"
1123         select SPL_HASH_SUPPORT
1124         select SPL_DFU_NO_RESET
1125         depends on SPL_RAM_SUPPORT
1126         help
1127           This feature enables the DFU (Device Firmware Upgrade) in SPL with
1128           RAM memory device support. The ROM code will load and execute
1129           the SPL built with dfu. The user can load binaries (u-boot/kernel) to
1130           selected device partition from host-pc using dfu-utils.
1131           This feature is useful to flash the binaries to factory or bare-metal
1132           boards using USB interface.
1133
1134 choice
1135         bool "DFU device selection"
1136         depends on SPL_DFU
1137
1138 config SPL_DFU_RAM
1139         bool "RAM device"
1140         depends on SPL_DFU && SPL_RAM_SUPPORT
1141         help
1142          select RAM/DDR memory device for loading binary images
1143          (u-boot/kernel) to the selected device partition using
1144          DFU and execute the u-boot/kernel from RAM.
1145
1146 endchoice
1147
1148 config SPL_USB_SDP_SUPPORT
1149         bool "Support SDP (Serial Download Protocol)"
1150         help
1151           Enable Serial Download Protocol (SDP) device support in SPL. This
1152           allows to download images into memory and execute (jump to) them
1153           using the same protocol as implemented by the i.MX family's boot ROM.
1154 endif
1155
1156 config SPL_WATCHDOG_SUPPORT
1157         bool "Support watchdog drivers"
1158         imply SPL_WDT if !HW_WATCHDOG
1159         help
1160           Enable support for watchdog drivers in SPL. A watchdog is
1161           typically a hardware peripheral which can reset the system when it
1162           detects no activity for a while (such as a software crash). This
1163           enables the drivers in drivers/watchdog as part of an SPL build.
1164
1165 config SPL_YMODEM_SUPPORT
1166         bool "Support loading using Ymodem"
1167         depends on SPL_SERIAL_SUPPORT
1168         help
1169           While loading from serial is slow it can be a useful backup when
1170           there is no other option. The Ymodem protocol provides a reliable
1171           means of transmitting U-Boot over a serial line for using in SPL,
1172           with a checksum to ensure correctness.
1173
1174 config SPL_ATF
1175         bool "Support ARM Trusted Firmware"
1176         depends on ARM64
1177         help
1178           ATF(ARM Trusted Firmware) is a component for ARM AArch64 which
1179           is loaded by SPL (which is considered as BL2 in ATF terminology).
1180           More detail at: https://github.com/ARM-software/arm-trusted-firmware
1181
1182 config SPL_ATF_NO_PLATFORM_PARAM
1183         bool "Pass no platform parameter"
1184         depends on SPL_ATF
1185         help
1186           While we expect to call a pointer to a valid FDT (or NULL)
1187           as the platform parameter to an ATF, some ATF versions are
1188           not U-Boot aware and have an insufficiently robust parameter
1189           validation to gracefully reject a FDT being passed.
1190
1191           If this option is enabled, the spl_atf os-type handler will
1192           always pass NULL for the platform parameter.
1193
1194           If your ATF is affected, say Y.
1195
1196 config SPL_AM33XX_ENABLE_RTC32K_OSC
1197         bool "Enable the RTC32K OSC on AM33xx based platforms"
1198         default y if AM33XX
1199         help
1200           Enable access to the AM33xx RTC and select the external 32kHz clock
1201           source.
1202
1203 config SPL_OPTEE
1204         bool "Support OP-TEE Trusted OS"
1205         depends on ARM
1206         help
1207           OP-TEE is an open source Trusted OS  which is loaded by SPL.
1208           More detail at: https://github.com/OP-TEE/optee_os
1209
1210 config SPL_OPENSBI
1211         bool "Support RISC-V OpenSBI"
1212         depends on RISCV && SPL_RISCV_MMODE && RISCV_SMODE
1213         help
1214           OpenSBI is an open-source implementation of the RISC-V Supervisor Binary
1215           Interface (SBI) specification. U-Boot supports the OpenSBI FW_DYNAMIC
1216           firmware. It is loaded and started by U-Boot SPL.
1217
1218           More details are available at https://github.com/riscv/opensbi and
1219           https://github.com/riscv/riscv-sbi-doc
1220
1221 config SPL_OPENSBI_LOAD_ADDR
1222         hex "OpenSBI load address"
1223         depends on SPL_OPENSBI
1224         help
1225           Load address of the OpenSBI binary.
1226
1227 config TPL
1228         bool
1229         depends on SUPPORT_TPL
1230         prompt "Enable TPL"
1231         help
1232           If you want to build TPL as well as the normal image and SPL, say Y.
1233
1234 if TPL
1235
1236 config TPL_SIZE_LIMIT
1237         hex "Maximum size of TPL image"
1238         depends on TPL
1239         default 0
1240         help
1241           Specifies the maximum length of the U-Boot TPL image.
1242           If this value is zero, it is ignored.
1243
1244 config TPL_HANDOFF
1245         bool "Pass hand-off information from TPL to SPL and U-Boot proper"
1246         depends on HANDOFF && TPL_BLOBLIST
1247         default y
1248         help
1249           This option enables TPL to write handoff information. This can be
1250           used to pass information like the size of SDRAM from TPL to U-Boot
1251           proper. The information is also available to SPL if it is useful
1252           there.
1253
1254 config TPL_BOARD_INIT
1255         bool "Call board-specific initialization in TPL"
1256         help
1257           If this option is enabled, U-Boot will call the function
1258           spl_board_init() from board_init_r(). This function should be
1259           provided by the board.
1260
1261 config TPL_LDSCRIPT
1262         string "Linker script for the TPL stage"
1263         depends on TPL
1264         default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
1265         default "arch/$(ARCH)/cpu/u-boot-spl.lds"
1266         help
1267           The TPL stage will usually require a different linker-script
1268           (as it runs from a different memory region) than the regular
1269           U-Boot stage.  Set this to the path of the linker-script to
1270           be used for TPL.
1271
1272           May be left empty to trigger the Makefile infrastructure to
1273           fall back to the linker-script used for the SPL stage.
1274
1275 config TPL_NEEDS_SEPARATE_TEXT_BASE
1276         bool "TPL needs a separate text-base"
1277         default n
1278         depends on TPL
1279         help
1280           Enable, if the TPL stage should not inherit its text-base
1281           from the SPL stage.  When enabled, a base address for the
1282           .text sections of the TPL stage has to be set below.
1283
1284 config TPL_NEEDS_SEPARATE_STACK
1285         bool "TPL needs a separate initial stack-pointer"
1286         default n
1287         depends on TPL
1288         help
1289           Enable, if the TPL stage should not inherit its initial
1290           stack-pointer from the settings for the SPL stage.
1291
1292 config TPL_TEXT_BASE
1293         hex "Base address for the .text section of the TPL stage"
1294         depends on TPL_NEEDS_SEPARATE_TEXT_BASE
1295         help
1296           The base address for the .text section of the TPL stage.
1297
1298 config TPL_MAX_SIZE
1299         int "Maximum size (in bytes) for the TPL stage"
1300         default 0
1301         depends on TPL
1302         help
1303           The maximum size (in bytes) of the TPL stage.
1304
1305 config TPL_STACK
1306         hex "Address of the initial stack-pointer for the TPL stage"
1307         depends on TPL_NEEDS_SEPARATE_STACK
1308         help
1309           The address of the initial stack-pointer for the TPL stage.
1310           Usually this will be the (aligned) top-of-stack.
1311
1312 config TPL_BOOTROM_SUPPORT
1313         bool "Support returning to the BOOTROM (from TPL)"
1314         help
1315           Some platforms (e.g. the Rockchip RK3368) provide support in their
1316           ROM for loading the next boot-stage after performing basic setup
1317           from the TPL stage.
1318
1319           Enable this option, to return to the BOOTROM through the
1320           BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
1321           boot device list, if not implemented for a given board)
1322
1323 config TPL_DRIVERS_MISC_SUPPORT
1324         bool "Support misc drivers in TPL"
1325         help
1326           Enable miscellaneous drivers in TPL. These drivers perform various
1327           tasks that don't fall nicely into other categories, Enable this
1328           option to build the drivers in drivers/misc as part of an TPL
1329           build, for those that support building in TPL (not all drivers do).
1330
1331 config TPL_ENV_SUPPORT
1332         bool "Support an environment"
1333         help
1334           Enable environment support in TPL. See SPL_ENV_SUPPORT for details.
1335
1336 config TPL_GPIO_SUPPORT
1337         bool "Support GPIO in TPL"
1338         help
1339           Enable support for GPIOs (General-purpose Input/Output) in TPL.
1340           GPIOs allow U-Boot to read the state of an input line (high or
1341           low) and set the state of an output line. This can be used to
1342           drive LEDs, control power to various system parts and read user
1343           input. GPIOs can be useful in TPL to enable a 'sign-of-life' LED,
1344           for example. Enable this option to build the drivers in
1345           drivers/gpio as part of an TPL build.
1346
1347 config TPL_I2C_SUPPORT
1348         bool "Support I2C"
1349         help
1350           Enable support for the I2C bus in TPL. See SPL_I2C_SUPPORT for
1351           details.
1352
1353 config TPL_LIBCOMMON_SUPPORT
1354         bool "Support common libraries"
1355         help
1356           Enable support for common U-Boot libraries within TPL. See
1357           SPL_LIBCOMMON_SUPPORT for details.
1358
1359 config TPL_LIBGENERIC_SUPPORT
1360         bool "Support generic libraries"
1361         help
1362           Enable support for generic U-Boot libraries within TPL. See
1363           SPL_LIBGENERIC_SUPPORT for details.
1364
1365 config TPL_MPC8XXX_INIT_DDR_SUPPORT
1366         bool "Support MPC8XXX DDR init"
1367         help
1368           Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
1369           SPL_MPC8XXX_INIT_DDR_SUPPORT for details.
1370
1371 config TPL_MMC_SUPPORT
1372         bool "Support MMC"
1373         depends on MMC
1374         help
1375           Enable support for MMC within TPL. See SPL_MMC_SUPPORT for details.
1376
1377 config TPL_NAND_SUPPORT
1378         bool "Support NAND flash"
1379         help
1380           Enable support for NAND in TPL. See SPL_NAND_SUPPORT for details.
1381
1382 config TPL_PCI
1383         bool "Support PCI drivers"
1384         help
1385           Enable support for PCI in TPL. For platforms that need PCI to boot,
1386           or must perform some init using PCI in SPL, this provides the
1387           necessary driver support. This enables the drivers in drivers/pci
1388           as part of a TPL build.
1389
1390 config TPL_PCH_SUPPORT
1391         bool "Support PCH drivers"
1392         help
1393           Enable support for PCH (Platform Controller Hub) devices in TPL.
1394           These are used to set up GPIOs and the SPI peripheral early in
1395           boot. This enables the drivers in drivers/pch as part of a TPL
1396           build.
1397
1398 config TPL_RAM_SUPPORT
1399         bool "Support booting from RAM"
1400         help
1401           Enable booting of an image in RAM. The image can be preloaded or
1402           it can be loaded by TPL directly into RAM (e.g. using USB).
1403
1404 config TPL_RAM_DEVICE
1405         bool "Support booting from preloaded image in RAM"
1406         depends on TPL_RAM_SUPPORT
1407         help
1408           Enable booting of an image already loaded in RAM. The image has to
1409           be already in memory when TPL takes over, e.g. loaded by the boot
1410           ROM.
1411
1412 config TPL_RTC_SUPPORT
1413         bool "Support RTC drivers"
1414         help
1415           Enable RTC (Real-time Clock) support in TPL. This includes support
1416           for reading and setting the time. Some RTC devices also have some
1417           non-volatile (battery-backed) memory which is accessible if
1418           needed. This enables the drivers in drivers/rtc as part of an TPL
1419           build.
1420
1421 config TPL_SERIAL_SUPPORT
1422         bool "Support serial"
1423         select TPL_PRINTF
1424         select TPL_STRTO
1425         help
1426           Enable support for serial in TPL. See SPL_SERIAL_SUPPORT for
1427           details.
1428
1429 config TPL_SPI_FLASH_SUPPORT
1430         bool "Support SPI flash drivers"
1431         help
1432           Enable support for using SPI flash in TPL. See SPL_SPI_FLASH_SUPPORT
1433           for details.
1434
1435 config TPL_SPI_LOAD
1436         bool "Support loading from SPI flash"
1437         depends on TPL_SPI_FLASH_SUPPORT
1438         help
1439           Enable support for loading next stage, U-Boot or otherwise, from
1440           SPI NOR in U-Boot TPL.
1441
1442 config TPL_SPI_SUPPORT
1443         bool "Support SPI drivers"
1444         help
1445           Enable support for using SPI in TPL. See SPL_SPI_SUPPORT for
1446           details.
1447
1448 config TPL_YMODEM_SUPPORT
1449         bool "Support loading using Ymodem"
1450         depends on TPL_SERIAL_SUPPORT
1451         help
1452           While loading from serial is slow it can be a useful backup when
1453           there is no other option. The Ymodem protocol provides a reliable
1454           means of transmitting U-Boot over a serial line for using in TPL,
1455           with a checksum to ensure correctness.
1456
1457 endif # TPL
1458
1459 config SPL_AT91_MCK_BYPASS
1460         bool "Use external clock signal as a source of main clock for AT91 platforms"
1461         depends on ARCH_AT91
1462         default n
1463         help
1464           Use external 8 to 24 Mhz clock signal as source of main clock instead
1465           of an external crystal oscillator.
1466           This option disables the internal driving on the XOUT pin.
1467           The external source has to provide a stable clock on the XIN pin.
1468           If this option is disabled, the SoC expects a crystal oscillator
1469           that needs driving on both XIN and XOUT lines.
1470
1471 endif # SPL
1472 endmenu