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