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
  10         bool
  11         depends on SUPPORT_SPL
  12         prompt "Enable SPL"
  13         help
  14           If you want to build SPL as well as the normal image, say Y.
  15
  16 config SPL_SYS_MALLOC_SIMPLE
  17         bool
  18         depends on SPL
  19         prompt "Only use malloc_simple functions in the SPL"
  20         help
  21           Say Y here to only use the *_simple malloc functions from
  22           malloc_simple.c, rather then using the versions from dlmalloc.c;
  23           this will make the SPL binary smaller at the cost of more heap
  24           usage as the *_simple malloc functions do not re-use free-ed mem.
  25
  26 config SPL_STACK_R
  27         depends on SPL
  28         bool "Enable SDRAM location for SPL stack"
  29         help
  30           SPL starts off execution in SRAM and thus typically has only a small
  31           stack available. Since SPL sets up DRAM while in its board_init_f()
  32           function, it is possible for the stack to move there before
  33           board_init_r() is reached. This option enables a special SDRAM
  34           location for the SPL stack. U-Boot SPL switches to this after
  35           board_init_f() completes, and before board_init_r() starts.
  36
  37 config SPL_STACK_R_ADDR
  38         depends on SPL_STACK_R
  39         hex "SDRAM location for SPL stack"
  40         help
  41           Specify the address in SDRAM for the SPL stack. This will be set up
  42           before board_init_r() is called.
  43
  44 config SPL_STACK_R_MALLOC_SIMPLE_LEN
  45         depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
  46         hex "Size of malloc_simple heap after switching to DRAM SPL stack"
  47         default 0x100000
  48         help
  49           Specify the amount of the stack to use as memory pool for
  50           malloc_simple after switching the stack to DRAM. This may be set
  51           to give board_init_r() a larger heap then the initial heap in
  52           SRAM which is limited to SYS_MALLOC_F_LEN bytes.
  53
  54 config SPL_SEPARATE_BSS
  55         depends on SPL
  56         bool "BSS section is in a different memory region from text"
  57         help
  58           Some platforms need a large BSS region in SPL and can provide this
  59           because RAM is already set up. In this case BSS can be moved to RAM.
  60           This option should then be enabled so that the correct device tree
  61           location is used. Normally we put the device tree at the end of BSS
  62           but with this option enabled, it goes at _image_binary_end.
  63
  64 config SPL_DISPLAY_PRINT
  65         depends on SPL
  66         bool "Display a board-specific message in SPL"
  67         help
  68           If this option is enabled, U-Boot will call the function
  69           spl_display_print() immediately after displaying the SPL console
  70           banner ("U-Boot SPL ..."). This function should be provided by
  71           the board.
  72
  73 config TPL
  74         bool
  75         depends on SPL && SUPPORT_TPL
  76         prompt "Enable TPL"
  77         help
  78           If you want to build TPL as well as the normal image and SPL, say Y.
  79
  80 config SPL_CRC32_SUPPORT
  81         bool "Support CRC32"
  82         depends on SPL_FIT
  83         help
  84           Enable this to support CRC32 in FIT images within SPL. This is a
  85           32-bit checksum value that can be used to verify images. This is
  86           the least secure type of checksum, suitable for detected
  87           accidental image corruption. For secure applications you should
  88           consider SHA1 or SHA256.
  89
  90 config SPL_MD5_SUPPORT
  91         bool "Support MD5"
  92         depends on SPL_FIT
  93         help
  94           Enable this to support MD5 in FIT images within SPL. An MD5
  95           checksum is a 128-bit hash value used to check that the image
  96           contents have not been corrupted. Note that MD5 is not considered
  97           secure as it is possible (with a brute-force attack) to adjust the
  98           image while still retaining the same MD5 hash value. For secure
  99           applications where images may be changed maliciously, you should
 100           consider SHA1 or SHA256.
 101
 102 config SPL_SHA1_SUPPORT
 103         bool "Support SHA1"
 104         depends on SPL_FIT
 105         help
 106           Enable this to support SHA1 in FIT images within SPL. A SHA1
 107           checksum is a 160-bit (20-byte) hash value used to check that the
 108           image contents have not been corrupted or maliciously altered.
 109           While SHA1 is fairly secure it is coming to the end of its life
 110           due to the expanding computing power avaiable to brute-force
 111           attacks. For more security, consider SHA256.
 112
 113 config SPL_SHA256_SUPPORT
 114         bool "Support SHA256"
 115         depends on SPL_FIT
 116         help
 117           Enable this to support SHA256 in FIT images within SPL. A SHA256
 118           checksum is a 256-bit (32-byte) hash value used to check that the
 119           image contents have not been corrupted. SHA256 is recommended for
 120           use in secure applications since (as at 2016) there is no known
 121           feasible attack that could produce a 'collision' with differing
 122           input data. Use this for the highest security. Note that only the
 123           SHA256 variant is supported: SHA512 and others are not currently
 124           supported in U-Boot.
 125
 126 config SPL_CRYPTO_SUPPORT
 127         bool "Support crypto drivers"
 128         depends on SPL
 129         help
 130           Enable crypto drivers in SPL. These drivers can be used to
 131           accelerate secure boot processing in secure applications. Enable
 132           this option to build the drivers in drivers/crypto as part of an
 133           SPL build.
 134
 135 config SPL_HASH_SUPPORT
 136         bool "Support hashing drivers"
 137         depends on SPL
 138         help
 139           Enable hashing drivers in SPL. These drivers can be used to
 140           accelerate secure boot processing in secure applications. Enable
 141           this option to build system-specific drivers for hash acceleration
 142           as part of an SPL build.
 143
 144 config SPL_DMA_SUPPORT
 145         bool "Support DMA drivers"
 146         depends on SPL
 147         help
 148           Enable DMA (direct-memory-access) drivers in SPL. These drivers
 149           can be used to handle memory-to-peripheral data transfer without
 150           the CPU moving the data. Enable this option to build the drivers
 151           in drivers/dma as part of an SPL build.
 152
 153 config SPL_DRIVERS_MISC_SUPPORT
 154         bool "Support misc drivers"
 155         depends on SPL
 156         help
 157           Enable miscellaneous drivers in SPL. These drivers perform various
 158           tasks that don't fall nicely into other categories, Enable this
 159           option to build the drivers in drivers/misc as part of an SPL
 160           build, for those that support building in SPL (not all drivers do).
 161
 162 config SPL_ENV_SUPPORT
 163         bool "Support an environment"
 164         depends on SPL
 165         help
 166           Enable environment support in SPL. The U-Boot environment provides
 167           a number of settings (essentially name/value pairs) which can
 168           control many aspects of U-Boot's operation. Normally this is not
 169           needed in SPL as it has a much simpler task with less
 170           configuration. But some boards use this to support 'Falcon' boot
 171           on EXT2 and FAT, where SPL boots directly into Linux without
 172           starting U-Boot first. Enabling this option will make getenv()
 173           and setenv() available in SPL.
 174
 175 config SPL_SAVEENV
 176         bool "Support save environment"
 177         depends on SPL && SPL_ENV_SUPPORT
 178         help
 179           Enable save environment support in SPL after setenv. By default
 180           the saveenv option is not provided in SPL, but some boards need
 181           this support in 'Falcon' boot, where SPL need to boot from
 182           different images based on environment variable set by OS. For
 183           example OS may set "reboot_image" environment variable to
 184           "recovery" inorder to boot recovery image by SPL. The SPL read
 185           "reboot_image" and act accordingly and change the reboot_image
 186           to default mode using setenv and save the environemnt.
 187
 188 config SPL_ETH_SUPPORT
 189         bool "Support Ethernet"
 190         depends on SPL_ENV_SUPPORT
 191         help
 192           Enable access to the network subsystem and associated Ethernet
 193           drivers in SPL. This permits SPL to load U-Boot over an Ethernet
 194           link rather than from an on-board peripheral. Environment support
 195           is required since the network stack uses a number of environment
 196           variables. See also SPL_NET_SUPPORT.
 197
 198 config SPL_EXT_SUPPORT
 199         bool "Support EXT filesystems"
 200         depends on SPL
 201         help
 202           Enable support for EXT2/3/4 filesystems with SPL. This permits
 203           U-Boot (or Linux in Falcon mode) to be loaded from an EXT
 204           filesystem from within SPL. Support for the underlying block
 205           device (e.g. MMC or USB) must be enabled separately.
 206
 207 config SPL_FAT_SUPPORT
 208         bool "Support FAT filesystems"
 209         depends on SPL
 210         help
 211           Enable support for FAT and VFAT filesystems with SPL. This
 212           permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
 213           filesystem from within SPL. Support for the underlying block
 214           device (e.g. MMC or USB) must be enabled separately.
 215
 216 config SPL_FPGA_SUPPORT
 217         bool "Support FPGAs"
 218         depends on SPL
 219         help
 220           Enable support for FPGAs in SPL. Field-programmable Gate Arrays
 221           provide software-configurable hardware which is typically used to
 222           implement peripherals (such as UARTs, LCD displays, MMC) or
 223           accelerate custom processing functions, such as image processing
 224           or machine learning. Sometimes it is useful to program the FPGA
 225           as early as possible during boot, and this option can enable that
 226           within SPL.
 227
 228 config SPL_GPIO_SUPPORT
 229         bool "Support GPIO"
 230         depends on SPL
 231         help
 232           Enable support for GPIOs (General-purpose Input/Output) in SPL.
 233           GPIOs allow U-Boot to read the state of an input line (high or
 234           low) and set the state of an output line. This can be used to
 235           drive LEDs, control power to various system parts and read user
 236           input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
 237           for example. Enable this option to build the drivers in
 238           drivers/gpio as part of an SPL build.
 239
 240 config SPL_I2C_SUPPORT
 241         bool "Support I2C"
 242         depends on SPL
 243         help
 244           Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
 245           I2C works with a clock and data line which can be driven by a
 246           one or more masters or slaves. It is a fairly complex bus but is
 247           widely used as it only needs two lines for communication. Speeds of
 248           400kbps are typical but up to 3.4Mbps is supported by some
 249           hardware. I2C can be useful in SPL to configure power management
 250           ICs (PMICs) before raising the CPU clock speed, for example.
 251           Enable this option to build the drivers in drivers/i2c as part of
 252           an SPL build.
 253
 254 config SPL_LIBCOMMON_SUPPORT
 255         bool "Support common libraries"
 256         depends on SPL
 257         help
 258           Enable support for common U-Boot libraries within SPL. These
 259           libraries include common code to deal with U-Boot images,
 260           environment and USB, for example. This option is enabled on many
 261           boards. Enable this option to build the code in common/ as part of
 262           an SPL build.
 263
 264 config SPL_LIBDISK_SUPPORT
 265         bool "Support disk paritions"
 266         depends on SPL
 267         help
 268           Enable support for disk partitions within SPL. 'Disk' is something
 269           of a misnomer as it includes non-spinning media such as flash (as
 270           used in MMC and USB sticks). Partitions provide a way for a disk
 271           to be split up into separate regions, with a partition table placed
 272           at the start or end which describes the location and size of each
 273           'partition'. These partitions are typically uses as individual block
 274           devices, typically with an EXT2 or FAT filesystem in each. This
 275           option enables whatever partition support has been enabled in
 276           U-Boot to also be used in SPL. It brings in the code in disk/.
 277
 278 config SPL_LIBGENERIC_SUPPORT
 279         bool "Support generic libraries"
 280         depends on SPL
 281         help
 282           Enable support for generic U-Boot libraries within SPL. These
 283           libraries include generic code to deal with device tree, hashing,
 284           printf(), compression and the like. This option is enabled on many
 285           boards. Enable this option to build the code in lib/ as part of an
 286           SPL build.
 287
 288 config SPL_MMC_SUPPORT
 289         bool "Support MMC"
 290         depends on SPL
 291         help
 292           Enable support for MMC (Multimedia Card) within SPL. This enables
 293           the MMC protocol implementation and allows any enabled drivers to
 294           be used within SPL. MMC can be used with or without disk partition
 295           support depending on the application (SPL_LIBDISK_SUPPORT). Enable
 296           this option to build the drivers in drivers/mmc as part of an SPL
 297           build.
 298
 299 config SPL_MPC8XXX_INIT_DDR_SUPPORT
 300         bool "Support MPC8XXX DDR init"
 301         depends on SPL
 302         help
 303           Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
 304           random-access memory) on the MPC8XXX family within SPL. This
 305           allows DRAM to be set up before loading U-Boot into that DRAM,
 306           where it can run.
 307
 308 config SPL_MTD_SUPPORT
 309         bool "Support MTD drivers"
 310         depends on SPL
 311         help
 312           Enable support for MTD (Memory Technology Device) within SPL. MTD
 313           provides a block interface over raw NAND and can also be used with
 314           SPI flash. This allows SPL to load U-Boot from supported MTD
 315           devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
 316           to enable specific MTD drivers.
 317
 318 config SPL_MUSB_NEW_SUPPORT
 319         bool "Support new Mentor Graphics USB"
 320         depends on SPL
 321         help
 322           Enable support for Mentor Graphics USB in SPL. This is a new
 323           driver used by some boards. Enable this option to build
 324           the drivers in drivers/usb/musb-new as part of an SPL build. The
 325           old drivers are in drivers/usb/musb.
 326
 327 config SPL_NAND_SUPPORT
 328         bool "Support NAND flash"
 329         depends on SPL
 330         help
 331           Enable support for NAND (Negative AND) flash in SPL. NAND flash
 332           can be used to allow SPL to load U-Boot from supported devices.
 333           This enables the drivers in drivers/mtd/nand as part of an SPL
 334           build.
 335
 336 config SPL_NET_SUPPORT
 337         bool "Support networking"
 338         depends on SPL
 339         help
 340           Enable support for network devices (such as Ethernet) in SPL.
 341           This permits SPL to load U-Boot over a network link rather than
 342           from an on-board peripheral. Environment support is required since
 343           the network stack uses a number of environment variables. See also
 344           SPL_ETH_SUPPORT.
 345
 346 if SPL_NET_SUPPORT
 347 config SPL_NET_VCI_STRING
 348         string "BOOTP Vendor Class Identifier string sent by SPL"
 349         help
 350           As defined by RFC 2132 the vendor class identifier field can be
 351           sent by the client to identify the vendor type and configuration
 352           of a client.  This is often used in practice to allow for the DHCP
 353           server to specify different files to load depending on if the ROM,
 354           SPL or U-Boot itself makes the request
 355 endif   # if SPL_NET_SUPPORT
 356
 357 config SPL_NO_CPU_SUPPORT
 358         bool "Drop CPU code in SPL"
 359         depends on SPL
 360         help
 361           This is specific to the ARM926EJ-S CPU. It disables the standard
 362           start.S start-up code, presumably so that a replacement can be
 363           used on that CPU. You should not enable it unless you know what
 364           you are doing.
 365
 366 config SPL_NOR_SUPPORT
 367         bool "Support NOR flash"
 368         depends on SPL
 369         help
 370           Enable support for loading U-Boot from memory-mapped NOR (Negative
 371           OR) flash in SPL. NOR flash is slow to write but fast to read, and
 372           a memory-mapped device makes it very easy to access. Loading from
 373           NOR is typically achieved with just a memcpy().
 374
 375 config SPL_ONENAND_SUPPORT
 376         bool "Support OneNAND flash"
 377         depends on SPL
 378         help
 379           Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
 380           a type of NAND flash and therefore can be used to allow SPL to
 381           load U-Boot from supported devices. This enables the drivers in
 382           drivers/mtd/onenand as part of an SPL build.
 383
 384 config SPL_OS_BOOT
 385         bool "Activate Falcon Mode"
 386         depends on SPL && !TI_SECURE_DEVICE
 387         default n
 388         help
 389           Enable booting directly to an OS from SPL.
 390           for more info read doc/README.falcon
 391
 392 if SPL_OS_BOOT
 393 config SYS_OS_BASE
 394         hex "addr, where OS is found"
 395         depends on SPL && SPL_NOR_SUPPORT
 396         help
 397           Specify the address, where the OS image is found, which
 398           gets booted.
 399
 400 endif # SPL_OS_BOOT
 401
 402 config SPL_POST_MEM_SUPPORT
 403         bool "Support POST drivers"
 404         depends on SPL
 405         help
 406           Enable support for POST (Power-on Self Test) in SPL. POST is a
 407           procedure that checks that the hardware (CPU or board) appears to
 408           be functionally correctly. It is a sanity check that can be
 409           performed before booting. This enables the drivers in post/drivers
 410           as part of an SPL build.
 411
 412 config SPL_POWER_SUPPORT
 413         bool "Support power drivers"
 414         depends on SPL
 415         help
 416           Enable support for power control in SPL. This includes support
 417           for PMICs (Power-management Integrated Circuits) and some of the
 418           features provided by PMICs. In particular, voltage regulators can
 419           be used to enable/disable power and vary its voltage. That can be
 420           useful in SPL to turn on boot peripherals and adjust CPU voltage
 421           so that the clock speed can be increased. This enables the drivers
 422           in drivers/power, drivers/power/pmic and drivers/power/regulator
 423           as part of an SPL build.
 424
 425 config SPL_SATA_SUPPORT
 426         bool "Support loading from SATA"
 427         depends on SPL
 428         help
 429           Enable support for SATA (Serial AT attachment) in SPL. This allows
 430           use of SATA devices such as hard drives and flash drivers for
 431           loading U-Boot. SATA is used in higher-end embedded systems and
 432           can provide higher performance than MMC , at somewhat higher
 433           expense and power consumption. This enables loading from SATA
 434           using a configured device.
 435
 436 config SPL_SERIAL_SUPPORT
 437         bool "Support serial"
 438         depends on SPL
 439         help
 440           Enable support for serial in SPL. This allows use of a serial UART
 441           for displaying messages while SPL is running. It also brings in
 442           printf() and panic() functions. This should normally be enabled
 443           unless there are space reasons not to. Even then, consider
 444           enabling USE_TINY_PRINTF which is a small printf() version.
 445
 446 config SPL_SPI_FLASH_SUPPORT
 447         bool "Support SPI flash drivers"
 448         depends on SPL
 449         help
 450           Enable support for using SPI flash in SPL, and loading U-Boot from
 451           SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
 452           the SPI bus that is used to connect it to a system. It is a simple
 453           but fast bidirectional 4-wire bus (clock, chip select and two data
 454           lines). This enables the drivers in drivers/mtd/spi as part of an
 455           SPL build. This normally requires SPL_SPI_SUPPORT.
 456
 457 config SPL_SPI_SUPPORT
 458         bool "Support SPI drivers"
 459         depends on SPL
 460         help
 461           Enable support for using SPI in SPL. This is used for connecting
 462           to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
 463           more details on that. The SPI driver provides the transport for
 464           data between the SPI flash and the CPU. This option can be used to
 465           enable SPI drivers that are needed for other purposes also, such
 466           as a SPI PMIC.
 467
 468 config SPL_USBETH_SUPPORT
 469         bool "Support USB Ethernet drivers"
 470         depends on SPL
 471         help
 472           Enable access to the USB network subsystem and associated
 473           drivers in SPL. This permits SPL to load U-Boot over a
 474           USB-connected Ethernet link (such as a USB Ethernet dongle) rather
 475           than from an onboard peripheral. Environment support is required
 476           since the network stack uses a number of environment variables.
 477           See also SPL_NET_SUPPORT and SPL_ETH_SUPPORT.
 478
 479 config SPL_USB_HOST_SUPPORT
 480         bool "Support USB host drivers"
 481         depends on SPL
 482         help
 483           Enable access to USB (Universal Serial Bus) host devices so that
 484           SPL can load U-Boot from a connected USB peripheral, such as a USB
 485           flash stick. While USB takes a little longer to start up than most
 486           buses, it is very flexible since many different types of storage
 487           device can be attached. This option enables the drivers in
 488           drivers/usb/host as part of an SPL build.
 489
 490 config SPL_USB_SUPPORT
 491         bool "Support loading from USB"
 492         depends on SPL_USB_HOST_SUPPORT
 493         help
 494           Enable support for USB devices in SPL. This allows use of USB
 495           devices such as hard drives and flash drivers for loading U-Boot.
 496           The actual drivers are enabled separately using the normal U-Boot
 497           config options. This enables loading from USB using a configured
 498           device.
 499
 500 config SPL_WATCHDOG_SUPPORT
 501         bool "Support watchdog drivers"
 502         depends on SPL
 503         help
 504           Enable support for watchdog drivers in SPL. A watchdog is
 505           typically a hardware peripheral which can reset the system when it
 506           detects no activity for a while (such as a software crash). This
 507           enables the drivers in drivers/watchdog as part of an SPL build.
 508
 509 config SPL_YMODEM_SUPPORT
 510         bool "Support loading using Ymodem"
 511         depends on SPL
 512         help
 513           While loading from serial is slow it can be a useful backup when
 514           there is no other option. The Ymodem protocol provides a reliable
 515           means of transmitting U-Boot over a serial line for using in SPL,
 516           with a checksum to ensure correctness.
 517
 518 config TPL_ENV_SUPPORT
 519         bool "Support an environment"
 520         depends on TPL
 521         help
 522           Enable environment support in TPL. See SPL_ENV_SUPPORT for details.
 523
 524 config TPL_I2C_SUPPORT
 525         bool "Support I2C"
 526         depends on TPL
 527         help
 528           Enable support for the I2C bus in SPL. See SPL_I2C_SUPPORT for
 529           details.
 530
 531 config TPL_LIBCOMMON_SUPPORT
 532         bool "Support common libraries"
 533         depends on TPL
 534         help
 535           Enable support for common U-Boot libraries within TPL. See
 536           SPL_LIBCOMMON_SUPPORT for details.
 537
 538 config TPL_LIBGENERIC_SUPPORT
 539         bool "Support generic libraries"
 540         depends on TPL
 541         help
 542           Enable support for generic U-Boot libraries within TPL. See
 543           SPL_LIBGENERIC_SUPPORT for details.
 544
 545 config TPL_MPC8XXX_INIT_DDR_SUPPORT
 546         bool "Support MPC8XXX DDR init"
 547         depends on TPL
 548         help
 549           Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
 550           SPL_MPC8XXX_INIT_DDR_SUPPORT for details.
 551
 552 config TPL_MMC_SUPPORT
 553         bool "Support MMC"
 554         depends on TPL
 555         help
 556           Enable support for MMC within TPL. See SPL_MMC_SUPPORT for details.
 557
 558 config TPL_NAND_SUPPORT
 559         bool "Support NAND flash"
 560         depends on TPL
 561         help
 562           Enable support for NAND in SPL. See SPL_NAND_SUPPORT for details.
 563
 564 config TPL_SERIAL_SUPPORT
 565         bool "Support serial"
 566         depends on TPL
 567         help
 568           Enable support for serial in SPL. See SPL_SERIAL_SUPPORT for
 569           details.
 570
 571 config TPL_SPI_FLASH_SUPPORT
 572         bool "Support SPI flash drivers"
 573         depends on TPL
 574         help
 575           Enable support for using SPI flash in SPL. See SPL_SPI_FLASH_SUPPORT
 576           for details.
 577
 578 config TPL_SPI_SUPPORT
 579         bool "Support SPI drivers"
 580         depends on TPL
 581         help
 582           Enable support for using SPI in SPL. See SPL_SPI_SUPPORT for
 583           details.
 584
 585 endmenu