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_BOARD_INIT
  20         depends on SPL
  21         bool "Call board-specific initialization in SPL"
  22         help
  23           If this option is enabled, U-Boot will call the function
  24           spl_board_init() from board_init_r(). This function should be
  25           provided by the board.
  26
  27 config SPL_RAW_IMAGE_SUPPORT
  28         bool "Support SPL loading and booting of RAW images"
  29         depends on SPL
  30         default n if (ARCH_MX6 && (SPL_MMC_SUPPORT || SPL_SATA_SUPPORT))
  31         default y if !TI_SECURE_DEVICE
  32         help
  33           SPL will support loading and booting a RAW image when this option
  34           is y. If this is not set, SPL will move on to other available
  35           boot media to find a suitable image.
  36
  37 config SPL_LEGACY_IMAGE_SUPPORT
  38         bool "Support SPL loading and booting of Legacy images"
  39         default y if !TI_SECURE_DEVICE
  40         help
  41           SPL will support loading and booting Legacy images when this option
  42           is y. If this is not set, SPL will move on to other available
  43           boot media to find a suitable image.
  44
  45 config SPL_SYS_MALLOC_SIMPLE
  46         bool
  47         depends on SPL
  48         prompt "Only use malloc_simple functions in the SPL"
  49         help
  50           Say Y here to only use the *_simple malloc functions from
  51           malloc_simple.c, rather then using the versions from dlmalloc.c;
  52           this will make the SPL binary smaller at the cost of more heap
  53           usage as the *_simple malloc functions do not re-use free-ed mem.
  54
  55 config SPL_STACK_R
  56         depends on SPL
  57         bool "Enable SDRAM location for SPL stack"
  58         help
  59           SPL starts off execution in SRAM and thus typically has only a small
  60           stack available. Since SPL sets up DRAM while in its board_init_f()
  61           function, it is possible for the stack to move there before
  62           board_init_r() is reached. This option enables a special SDRAM
  63           location for the SPL stack. U-Boot SPL switches to this after
  64           board_init_f() completes, and before board_init_r() starts.
  65
  66 config SPL_STACK_R_ADDR
  67         depends on SPL_STACK_R
  68         hex "SDRAM location for SPL stack"
  69         help
  70           Specify the address in SDRAM for the SPL stack. This will be set up
  71           before board_init_r() is called.
  72
  73 config SPL_STACK_R_MALLOC_SIMPLE_LEN
  74         depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
  75         hex "Size of malloc_simple heap after switching to DRAM SPL stack"
  76         default 0x100000
  77         help
  78           Specify the amount of the stack to use as memory pool for
  79           malloc_simple after switching the stack to DRAM. This may be set
  80           to give board_init_r() a larger heap then the initial heap in
  81           SRAM which is limited to SYS_MALLOC_F_LEN bytes.
  82
  83 config SPL_SEPARATE_BSS
  84         depends on SPL
  85         bool "BSS section is in a different memory region from text"
  86         help
  87           Some platforms need a large BSS region in SPL and can provide this
  88           because RAM is already set up. In this case BSS can be moved to RAM.
  89           This option should then be enabled so that the correct device tree
  90           location is used. Normally we put the device tree at the end of BSS
  91           but with this option enabled, it goes at _image_binary_end.
  92
  93 config SPL_DISPLAY_PRINT
  94         depends on SPL
  95         bool "Display a board-specific message in SPL"
  96         help
  97           If this option is enabled, U-Boot will call the function
  98           spl_display_print() immediately after displaying the SPL console
  99           banner ("U-Boot SPL ..."). This function should be provided by
 100           the board.
 101
 102 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
 103         bool "MMC raw mode: by sector"
 104         depends on SPL
 105         default y if ARCH_SUNXI || ARCH_DAVINCI || ARCH_UNIPHIER ||ARCH_MX6 || \
 106                      ARCH_ROCKCHIP || ARCH_MVEBU ||  ARCH_SOCFPGA || \
 107                      ARCH_AT91 || ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || \
 108                      OMAP44XX || OMAP54XX || AM33XX || AM43XX
 109         help
 110           Use sector number for specifying U-Boot location on MMC/SD in
 111           raw mode.
 112
 113 config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
 114         hex "Address on the MMC to load U-Boot from"
 115         depends on SPL && SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
 116         default 0x50 if ARCH_SUNXI
 117         default 0x75 if ARCH_DAVINCI
 118         default 0x8a if ARCH_MX6
 119         default 0x100 if ARCH_ROCKCHIP || ARCH_UNIPHIER
 120         default 0x140 if ARCH_MVEBU
 121         default 0x200 if ARCH_SOCFPGA || ARCH_AT91
 122         default 0x300 if ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || OMAP44XX || \
 123                          OMAP54XX || AM33XX || AM43XX
 124         help
 125           Address on the MMC to load U-Boot from, when the MMC is being used
 126           in raw mode. Units: MMC sectors (1 sector = 512 bytes).
 127
 128 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
 129         bool "MMC Raw mode: by partition"
 130         depends on SPL
 131         help
 132           Use a partition for loading U-Boot when using MMC/SD in raw mode.
 133
 134 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
 135         hex "Partition to use to load U-Boot from"
 136         depends on SPL && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
 137         default 1
 138         help
 139           Partition on the MMC to load U-Boot from when the MMC is being
 140           used in raw mode
 141
 142 config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
 143         bool "MMC raw mode: by partition type"
 144         depends on SPL && DOS_PARTITION && \
 145                 SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
 146         help
 147           Use partition type for specifying U-Boot partition on MMC/SD in
 148           raw mode. U-Boot will be loaded from the first partition of this
 149           type to be found.
 150
 151 config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
 152         hex "Partition Type on the MMC to load U-Boot from"
 153         depends on SPL && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
 154         help
 155           Partition Type on the MMC to load U-Boot from, when the MMC is being
 156           used in raw mode.
 157
 158 config TPL
 159         bool
 160         depends on SPL && SUPPORT_TPL
 161         prompt "Enable TPL"
 162         help
 163           If you want to build TPL as well as the normal image and SPL, say Y.
 164
 165 config SPL_CRC32_SUPPORT
 166         bool "Support CRC32"
 167         depends on SPL_FIT
 168         help
 169           Enable this to support CRC32 in FIT images within SPL. This is a
 170           32-bit checksum value that can be used to verify images. This is
 171           the least secure type of checksum, suitable for detected
 172           accidental image corruption. For secure applications you should
 173           consider SHA1 or SHA256.
 174
 175 config SPL_MD5_SUPPORT
 176         bool "Support MD5"
 177         depends on SPL_FIT
 178         help
 179           Enable this to support MD5 in FIT images within SPL. An MD5
 180           checksum is a 128-bit hash value used to check that the image
 181           contents have not been corrupted. Note that MD5 is not considered
 182           secure as it is possible (with a brute-force attack) to adjust the
 183           image while still retaining the same MD5 hash value. For secure
 184           applications where images may be changed maliciously, you should
 185           consider SHA1 or SHA256.
 186
 187 config SPL_SHA1_SUPPORT
 188         bool "Support SHA1"
 189         depends on SPL_FIT
 190         help
 191           Enable this to support SHA1 in FIT images within SPL. A SHA1
 192           checksum is a 160-bit (20-byte) hash value used to check that the
 193           image contents have not been corrupted or maliciously altered.
 194           While SHA1 is fairly secure it is coming to the end of its life
 195           due to the expanding computing power avaiable to brute-force
 196           attacks. For more security, consider SHA256.
 197
 198 config SPL_SHA256_SUPPORT
 199         bool "Support SHA256"
 200         depends on SPL_FIT
 201         help
 202           Enable this to support SHA256 in FIT images within SPL. A SHA256
 203           checksum is a 256-bit (32-byte) hash value used to check that the
 204           image contents have not been corrupted. SHA256 is recommended for
 205           use in secure applications since (as at 2016) there is no known
 206           feasible attack that could produce a 'collision' with differing
 207           input data. Use this for the highest security. Note that only the
 208           SHA256 variant is supported: SHA512 and others are not currently
 209           supported in U-Boot.
 210
 211 config SPL_CPU_SUPPORT
 212         bool "Support CPU drivers"
 213         depends on SPL
 214         help
 215           Enable this to support CPU drivers in SPL. These drivers can set
 216           up CPUs and provide information about them such as the model and
 217           name. This can be useful in SPL since setting up the CPUs earlier
 218           may improve boot performance. Enable this option to build the
 219           drivers in drivers/cpu as part of an SPL build.
 220
 221 config SPL_CRYPTO_SUPPORT
 222         bool "Support crypto drivers"
 223         depends on SPL
 224         help
 225           Enable crypto drivers in SPL. These drivers can be used to
 226           accelerate secure boot processing in secure applications. Enable
 227           this option to build the drivers in drivers/crypto as part of an
 228           SPL build.
 229
 230 config SPL_HASH_SUPPORT
 231         bool "Support hashing drivers"
 232         depends on SPL
 233         help
 234           Enable hashing drivers in SPL. These drivers can be used to
 235           accelerate secure boot processing in secure applications. Enable
 236           this option to build system-specific drivers for hash acceleration
 237           as part of an SPL build.
 238
 239 config SPL_DMA_SUPPORT
 240         bool "Support DMA drivers"
 241         depends on SPL
 242         help
 243           Enable DMA (direct-memory-access) drivers in SPL. These drivers
 244           can be used to handle memory-to-peripheral data transfer without
 245           the CPU moving the data. Enable this option to build the drivers
 246           in drivers/dma as part of an SPL build.
 247
 248 config SPL_DRIVERS_MISC_SUPPORT
 249         bool "Support misc drivers"
 250         depends on SPL
 251         help
 252           Enable miscellaneous drivers in SPL. These drivers perform various
 253           tasks that don't fall nicely into other categories, Enable this
 254           option to build the drivers in drivers/misc as part of an SPL
 255           build, for those that support building in SPL (not all drivers do).
 256
 257 config SPL_ENV_SUPPORT
 258         bool "Support an environment"
 259         depends on SPL
 260         help
 261           Enable environment support in SPL. The U-Boot environment provides
 262           a number of settings (essentially name/value pairs) which can
 263           control many aspects of U-Boot's operation. Normally this is not
 264           needed in SPL as it has a much simpler task with less
 265           configuration. But some boards use this to support 'Falcon' boot
 266           on EXT2 and FAT, where SPL boots directly into Linux without
 267           starting U-Boot first. Enabling this option will make getenv()
 268           and setenv() available in SPL.
 269
 270 config SPL_SAVEENV
 271         bool "Support save environment"
 272         depends on SPL && SPL_ENV_SUPPORT
 273         help
 274           Enable save environment support in SPL after setenv. By default
 275           the saveenv option is not provided in SPL, but some boards need
 276           this support in 'Falcon' boot, where SPL need to boot from
 277           different images based on environment variable set by OS. For
 278           example OS may set "reboot_image" environment variable to
 279           "recovery" inorder to boot recovery image by SPL. The SPL read
 280           "reboot_image" and act accordingly and change the reboot_image
 281           to default mode using setenv and save the environemnt.
 282
 283 config SPL_ETH_SUPPORT
 284         bool "Support Ethernet"
 285         depends on SPL_ENV_SUPPORT
 286         help
 287           Enable access to the network subsystem and associated Ethernet
 288           drivers in SPL. This permits SPL to load U-Boot over an Ethernet
 289           link rather than from an on-board peripheral. Environment support
 290           is required since the network stack uses a number of environment
 291           variables. See also SPL_NET_SUPPORT.
 292
 293 config SPL_EXT_SUPPORT
 294         bool "Support EXT filesystems"
 295         depends on SPL
 296         help
 297           Enable support for EXT2/3/4 filesystems with SPL. This permits
 298           U-Boot (or Linux in Falcon mode) to be loaded from an EXT
 299           filesystem from within SPL. Support for the underlying block
 300           device (e.g. MMC or USB) must be enabled separately.
 301
 302 config SPL_FAT_SUPPORT
 303         bool "Support FAT filesystems"
 304         depends on SPL
 305         help
 306           Enable support for FAT and VFAT filesystems with SPL. This
 307           permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
 308           filesystem from within SPL. Support for the underlying block
 309           device (e.g. MMC or USB) must be enabled separately.
 310
 311 config SPL_FPGA_SUPPORT
 312         bool "Support FPGAs"
 313         depends on SPL
 314         help
 315           Enable support for FPGAs in SPL. Field-programmable Gate Arrays
 316           provide software-configurable hardware which is typically used to
 317           implement peripherals (such as UARTs, LCD displays, MMC) or
 318           accelerate custom processing functions, such as image processing
 319           or machine learning. Sometimes it is useful to program the FPGA
 320           as early as possible during boot, and this option can enable that
 321           within SPL.
 322
 323 config SPL_GPIO_SUPPORT
 324         bool "Support GPIO"
 325         depends on SPL
 326         help
 327           Enable support for GPIOs (General-purpose Input/Output) in SPL.
 328           GPIOs allow U-Boot to read the state of an input line (high or
 329           low) and set the state of an output line. This can be used to
 330           drive LEDs, control power to various system parts and read user
 331           input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
 332           for example. Enable this option to build the drivers in
 333           drivers/gpio as part of an SPL build.
 334
 335 config SPL_I2C_SUPPORT
 336         bool "Support I2C"
 337         depends on SPL
 338         help
 339           Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
 340           I2C works with a clock and data line which can be driven by a
 341           one or more masters or slaves. It is a fairly complex bus but is
 342           widely used as it only needs two lines for communication. Speeds of
 343           400kbps are typical but up to 3.4Mbps is supported by some
 344           hardware. I2C can be useful in SPL to configure power management
 345           ICs (PMICs) before raising the CPU clock speed, for example.
 346           Enable this option to build the drivers in drivers/i2c as part of
 347           an SPL build.
 348
 349 config SPL_LIBCOMMON_SUPPORT
 350         bool "Support common libraries"
 351         depends on SPL
 352         help
 353           Enable support for common U-Boot libraries within SPL. These
 354           libraries include common code to deal with U-Boot images,
 355           environment and USB, for example. This option is enabled on many
 356           boards. Enable this option to build the code in common/ as part of
 357           an SPL build.
 358
 359 config SPL_LIBDISK_SUPPORT
 360         bool "Support disk paritions"
 361         depends on SPL
 362         help
 363           Enable support for disk partitions within SPL. 'Disk' is something
 364           of a misnomer as it includes non-spinning media such as flash (as
 365           used in MMC and USB sticks). Partitions provide a way for a disk
 366           to be split up into separate regions, with a partition table placed
 367           at the start or end which describes the location and size of each
 368           'partition'. These partitions are typically uses as individual block
 369           devices, typically with an EXT2 or FAT filesystem in each. This
 370           option enables whatever partition support has been enabled in
 371           U-Boot to also be used in SPL. It brings in the code in disk/.
 372
 373 config SPL_LIBGENERIC_SUPPORT
 374         bool "Support generic libraries"
 375         depends on SPL
 376         help
 377           Enable support for generic U-Boot libraries within SPL. These
 378           libraries include generic code to deal with device tree, hashing,
 379           printf(), compression and the like. This option is enabled on many
 380           boards. Enable this option to build the code in lib/ as part of an
 381           SPL build.
 382
 383 config SPL_MMC_SUPPORT
 384         bool "Support MMC"
 385         depends on SPL && MMC
 386         help
 387           Enable support for MMC (Multimedia Card) within SPL. This enables
 388           the MMC protocol implementation and allows any enabled drivers to
 389           be used within SPL. MMC can be used with or without disk partition
 390           support depending on the application (SPL_LIBDISK_SUPPORT). Enable
 391           this option to build the drivers in drivers/mmc as part of an SPL
 392           build.
 393
 394 config SPL_MPC8XXX_INIT_DDR_SUPPORT
 395         bool "Support MPC8XXX DDR init"
 396         depends on SPL
 397         help
 398           Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
 399           random-access memory) on the MPC8XXX family within SPL. This
 400           allows DRAM to be set up before loading U-Boot into that DRAM,
 401           where it can run.
 402
 403 config SPL_MTD_SUPPORT
 404         bool "Support MTD drivers"
 405         depends on SPL
 406         help
 407           Enable support for MTD (Memory Technology Device) within SPL. MTD
 408           provides a block interface over raw NAND and can also be used with
 409           SPI flash. This allows SPL to load U-Boot from supported MTD
 410           devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
 411           to enable specific MTD drivers.
 412
 413 config SPL_MUSB_NEW_SUPPORT
 414         bool "Support new Mentor Graphics USB"
 415         depends on SPL
 416         help
 417           Enable support for Mentor Graphics USB in SPL. This is a new
 418           driver used by some boards. Enable this option to build
 419           the drivers in drivers/usb/musb-new as part of an SPL build. The
 420           old drivers are in drivers/usb/musb.
 421
 422 config SPL_NAND_SUPPORT
 423         bool "Support NAND flash"
 424         depends on SPL
 425         help
 426           Enable support for NAND (Negative AND) flash in SPL. NAND flash
 427           can be used to allow SPL to load U-Boot from supported devices.
 428           This enables the drivers in drivers/mtd/nand as part of an SPL
 429           build.
 430
 431 config SPL_NET_SUPPORT
 432         bool "Support networking"
 433         depends on SPL
 434         help
 435           Enable support for network devices (such as Ethernet) in SPL.
 436           This permits SPL to load U-Boot over a network link rather than
 437           from an on-board peripheral. Environment support is required since
 438           the network stack uses a number of environment variables. See also
 439           SPL_ETH_SUPPORT.
 440
 441 if SPL_NET_SUPPORT
 442 config SPL_NET_VCI_STRING
 443         string "BOOTP Vendor Class Identifier string sent by SPL"
 444         help
 445           As defined by RFC 2132 the vendor class identifier field can be
 446           sent by the client to identify the vendor type and configuration
 447           of a client.  This is often used in practice to allow for the DHCP
 448           server to specify different files to load depending on if the ROM,
 449           SPL or U-Boot itself makes the request
 450 endif   # if SPL_NET_SUPPORT
 451
 452 config SPL_NO_CPU_SUPPORT
 453         bool "Drop CPU code in SPL"
 454         depends on SPL
 455         help
 456           This is specific to the ARM926EJ-S CPU. It disables the standard
 457           start.S start-up code, presumably so that a replacement can be
 458           used on that CPU. You should not enable it unless you know what
 459           you are doing.
 460
 461 config SPL_NOR_SUPPORT
 462         bool "Support NOR flash"
 463         depends on SPL
 464         help
 465           Enable support for loading U-Boot from memory-mapped NOR (Negative
 466           OR) flash in SPL. NOR flash is slow to write but fast to read, and
 467           a memory-mapped device makes it very easy to access. Loading from
 468           NOR is typically achieved with just a memcpy().
 469
 470 config SPL_ONENAND_SUPPORT
 471         bool "Support OneNAND flash"
 472         depends on SPL
 473         help
 474           Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
 475           a type of NAND flash and therefore can be used to allow SPL to
 476           load U-Boot from supported devices. This enables the drivers in
 477           drivers/mtd/onenand as part of an SPL build.
 478
 479 config SPL_OS_BOOT
 480         bool "Activate Falcon Mode"
 481         depends on SPL && !TI_SECURE_DEVICE
 482         default n
 483         help
 484           Enable booting directly to an OS from SPL.
 485           for more info read doc/README.falcon
 486
 487 if SPL_OS_BOOT
 488 config SYS_OS_BASE
 489         hex "addr, where OS is found"
 490         depends on SPL && SPL_NOR_SUPPORT
 491         help
 492           Specify the address, where the OS image is found, which
 493           gets booted.
 494
 495 endif # SPL_OS_BOOT
 496
 497 config SPL_PCI_SUPPORT
 498         bool "Support PCI drivers"
 499         depends on SPL
 500         help
 501           Enable support for PCI in SPL. For platforms that need PCI to boot,
 502           or must perform some init using PCI in SPL, this provides the
 503           necessary driver support. This enables the drivers in drivers/pci
 504           as part of an SPL build.
 505
 506 config SPL_PCH_SUPPORT
 507         bool "Support PCH drivers"
 508         depends on SPL
 509         help
 510           Enable support for PCH (Platform Controller Hub) devices in SPL.
 511           These are used to set up GPIOs and the SPI peripheral early in
 512           boot. This enables the drivers in drivers/pch as part of an SPL
 513           build.
 514
 515 config SPL_POST_MEM_SUPPORT
 516         bool "Support POST drivers"
 517         depends on SPL
 518         help
 519           Enable support for POST (Power-on Self Test) in SPL. POST is a
 520           procedure that checks that the hardware (CPU or board) appears to
 521           be functionally correctly. It is a sanity check that can be
 522           performed before booting. This enables the drivers in post/drivers
 523           as part of an SPL build.
 524
 525 config SPL_POWER_SUPPORT
 526         bool "Support power drivers"
 527         depends on SPL
 528         help
 529           Enable support for power control in SPL. This includes support
 530           for PMICs (Power-management Integrated Circuits) and some of the
 531           features provided by PMICs. In particular, voltage regulators can
 532           be used to enable/disable power and vary its voltage. That can be
 533           useful in SPL to turn on boot peripherals and adjust CPU voltage
 534           so that the clock speed can be increased. This enables the drivers
 535           in drivers/power, drivers/power/pmic and drivers/power/regulator
 536           as part of an SPL build.
 537
 538 config SPL_RAM_SUPPORT
 539         bool "Support booting from RAM"
 540         depends on SPL
 541         default y if MICROBLAZE || ARCH_SOCFPGA || TEGRA || ARCH_ZYNQ
 542         help
 543           Enable booting of an image in RAM. The image can be preloaded or
 544           it can be loaded by SPL directly into RAM (e.g. using USB).
 545
 546 config SPL_RAM_DEVICE
 547         bool "Support booting from preloaded image in RAM"
 548         depends on SPL_RAM_SUPPORT
 549         default y if MICROBLAZE || ARCH_SOCFPGA || TEGRA || ARCH_ZYNQ
 550         help
 551           Enable booting of an image already loaded in RAM. The image has to
 552           be already in memory when SPL takes over, e.g. loaded by the boot
 553           ROM.
 554
 555 config SPL_RTC_SUPPORT
 556         bool "Support RTC drivers"
 557         depends on SPL
 558         help
 559           Enable RTC (Real-time Clock) support in SPL. This includes support
 560           for reading and setting the time. Some RTC devices also have some
 561           non-volatile (battery-backed) memory which is accessible if
 562           needed. This enables the drivers in drivers/rtc as part of an SPL
 563           build.
 564
 565 config SPL_SATA_SUPPORT
 566         bool "Support loading from SATA"
 567         depends on SPL
 568         help
 569           Enable support for SATA (Serial AT attachment) in SPL. This allows
 570           use of SATA devices such as hard drives and flash drivers for
 571           loading U-Boot. SATA is used in higher-end embedded systems and
 572           can provide higher performance than MMC , at somewhat higher
 573           expense and power consumption. This enables loading from SATA
 574           using a configured device.
 575
 576 config SPL_SERIAL_SUPPORT
 577         bool "Support serial"
 578         depends on SPL
 579         help
 580           Enable support for serial in SPL. This allows use of a serial UART
 581           for displaying messages while SPL is running. It also brings in
 582           printf() and panic() functions. This should normally be enabled
 583           unless there are space reasons not to. Even then, consider
 584           enabling USE_TINY_PRINTF which is a small printf() version.
 585
 586 config SPL_SPI_FLASH_SUPPORT
 587         bool "Support SPI flash drivers"
 588         depends on SPL
 589         help
 590           Enable support for using SPI flash in SPL, and loading U-Boot from
 591           SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
 592           the SPI bus that is used to connect it to a system. It is a simple
 593           but fast bidirectional 4-wire bus (clock, chip select and two data
 594           lines). This enables the drivers in drivers/mtd/spi as part of an
 595           SPL build. This normally requires SPL_SPI_SUPPORT.
 596
 597 config SPL_SPI_SUPPORT
 598         bool "Support SPI drivers"
 599         depends on SPL
 600         help
 601           Enable support for using SPI in SPL. This is used for connecting
 602           to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
 603           more details on that. The SPI driver provides the transport for
 604           data between the SPI flash and the CPU. This option can be used to
 605           enable SPI drivers that are needed for other purposes also, such
 606           as a SPI PMIC.
 607
 608 config SPL_TIMER_SUPPORT
 609         bool "Support timer drivers"
 610         depends on SPL
 611         help
 612           Enable support for timer drivers in SPL. These can be used to get
 613           a timer value when in SPL, or perhaps for implementing a delay
 614           function. This enables the drivers in drivers/timer as part of an
 615           SPL build.
 616
 617 config SPL_USB_HOST_SUPPORT
 618         bool "Support USB host drivers"
 619         depends on SPL
 620         help
 621           Enable access to USB (Universal Serial Bus) host devices so that
 622           SPL can load U-Boot from a connected USB peripheral, such as a USB
 623           flash stick. While USB takes a little longer to start up than most
 624           buses, it is very flexible since many different types of storage
 625           device can be attached. This option enables the drivers in
 626           drivers/usb/host as part of an SPL build.
 627
 628 config SPL_USB_SUPPORT
 629         bool "Support loading from USB"
 630         depends on SPL_USB_HOST_SUPPORT
 631         help
 632           Enable support for USB devices in SPL. This allows use of USB
 633           devices such as hard drives and flash drivers for loading U-Boot.
 634           The actual drivers are enabled separately using the normal U-Boot
 635           config options. This enables loading from USB using a configured
 636           device.
 637
 638 config SPL_USB_GADGET_SUPPORT
 639         bool "Suppport USB Gadget drivers"
 640         depends on SPL
 641         help
 642           Enable USB Gadget API which allows to enable USB device functions
 643           in SPL.
 644
 645 if SPL_USB_GADGET_SUPPORT
 646
 647 config SPL_USBETH_SUPPORT
 648         bool "Support USB Ethernet drivers"
 649         help
 650           Enable access to the USB network subsystem and associated
 651           drivers in SPL. This permits SPL to load U-Boot over a
 652           USB-connected Ethernet link (such as a USB Ethernet dongle) rather
 653           than from an onboard peripheral. Environment support is required
 654           since the network stack uses a number of environment variables.
 655           See also SPL_NET_SUPPORT and SPL_ETH_SUPPORT.
 656
 657 config SPL_DFU_SUPPORT
 658         bool "Support DFU (Device Firmware Upgarde)"
 659         select SPL_HASH_SUPPORT
 660         select SPL_DFU_NO_RESET
 661         depends on SPL_RAM_SUPPORT
 662         help
 663           This feature enables the DFU (Device Firmware Upgarde) in SPL with
 664           RAM memory device support. The ROM code will load and execute
 665           the SPL built with dfu. The user can load binaries (u-boot/kernel) to
 666           selected device partition from host-pc using dfu-utils.
 667           This feature is useful to flash the binaries to factory or bare-metal
 668           boards using USB interface.
 669
 670 choice
 671         bool "DFU device selection"
 672         depends on SPL_DFU_SUPPORT
 673
 674 config SPL_DFU_RAM
 675         bool "RAM device"
 676         depends on SPL_DFU_SUPPORT && SPL_RAM_SUPPORT
 677         help
 678          select RAM/DDR memory device for loading binary images
 679          (u-boot/kernel) to the selected device partition using
 680          DFU and execute the u-boot/kernel from RAM.
 681
 682 endchoice
 683
 684 endif
 685
 686 config SPL_WATCHDOG_SUPPORT
 687         bool "Support watchdog drivers"
 688         depends on SPL
 689         help
 690           Enable support for watchdog drivers in SPL. A watchdog is
 691           typically a hardware peripheral which can reset the system when it
 692           detects no activity for a while (such as a software crash). This
 693           enables the drivers in drivers/watchdog as part of an SPL build.
 694
 695 config SPL_YMODEM_SUPPORT
 696         bool "Support loading using Ymodem"
 697         depends on SPL
 698         help
 699           While loading from serial is slow it can be a useful backup when
 700           there is no other option. The Ymodem protocol provides a reliable
 701           means of transmitting U-Boot over a serial line for using in SPL,
 702           with a checksum to ensure correctness.
 703
 704 config SPL_ATF_SUPPORT
 705         bool "Support ARM Trusted Firmware"
 706         depends on SPL && ARM64
 707         help
 708           ATF(ARM Trusted Firmware) is a component for ARM arch64 which which
 709           is loaded by SPL(which is considered as BL2 in ATF terminology).
 710           More detail at: https://github.com/ARM-software/arm-trusted-firmware
 711
 712 config SPL_ATF_TEXT_BASE
 713         depends on SPL_ATF_SUPPORT
 714         hex "ATF BL31 base address"
 715         help
 716           This is the base address in memory for ATF BL31 text and entry point.
 717
 718 config TPL_ENV_SUPPORT
 719         bool "Support an environment"
 720         depends on TPL
 721         help
 722           Enable environment support in TPL. See SPL_ENV_SUPPORT for details.
 723
 724 config TPL_I2C_SUPPORT
 725         bool "Support I2C"
 726         depends on TPL
 727         help
 728           Enable support for the I2C bus in SPL. See SPL_I2C_SUPPORT for
 729           details.
 730
 731 config TPL_LIBCOMMON_SUPPORT
 732         bool "Support common libraries"
 733         depends on TPL
 734         help
 735           Enable support for common U-Boot libraries within TPL. See
 736           SPL_LIBCOMMON_SUPPORT for details.
 737
 738 config TPL_LIBGENERIC_SUPPORT
 739         bool "Support generic libraries"
 740         depends on TPL
 741         help
 742           Enable support for generic U-Boot libraries within TPL. See
 743           SPL_LIBGENERIC_SUPPORT for details.
 744
 745 config TPL_MPC8XXX_INIT_DDR_SUPPORT
 746         bool "Support MPC8XXX DDR init"
 747         depends on TPL
 748         help
 749           Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
 750           SPL_MPC8XXX_INIT_DDR_SUPPORT for details.
 751
 752 config TPL_MMC_SUPPORT
 753         bool "Support MMC"
 754         depends on TPL && MMC
 755         help
 756           Enable support for MMC within TPL. See SPL_MMC_SUPPORT for details.
 757
 758 config TPL_NAND_SUPPORT
 759         bool "Support NAND flash"
 760         depends on TPL
 761         help
 762           Enable support for NAND in SPL. See SPL_NAND_SUPPORT for details.
 763
 764 config TPL_SERIAL_SUPPORT
 765         bool "Support serial"
 766         depends on TPL
 767         help
 768           Enable support for serial in SPL. See SPL_SERIAL_SUPPORT for
 769           details.
 770
 771 config TPL_SPI_FLASH_SUPPORT
 772         bool "Support SPI flash drivers"
 773         depends on TPL
 774         help
 775           Enable support for using SPI flash in SPL. See SPL_SPI_FLASH_SUPPORT
 776           for details.
 777
 778 config TPL_SPI_SUPPORT
 779         bool "Support SPI drivers"
 780         depends on TPL
 781         help
 782           Enable support for using SPI in SPL. See SPL_SPI_SUPPORT for
 783           details.
 784
 785 endmenu