1menu "SPL / TPL" 2 3config SUPPORT_SPL 4 bool 5 6config SUPPORT_TPL 7 bool 8 9config 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 16config 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 26config 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 37config 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 44config 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 54config 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 64config 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 73config 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 80config 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 90config 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 102config 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 113config 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 126config 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 135config 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 144config 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 153config 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 162config 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 175config SPL_ETH_SUPPORT 176 bool "Support Ethernet" 177 depends on SPL_ENV_SUPPORT 178 help 179 Enable access to the network subsystem and associated Ethernet 180 drivers in SPL. This permits SPL to load U-Boot over an Ethernet 181 link rather than from an on-board peripheral. Environment support 182 is required since the network stack uses a number of environment 183 variables. See also SPL_NET_SUPPORT. 184 185config SPL_EXT_SUPPORT 186 bool "Support EXT filesystems" 187 depends on SPL 188 help 189 Enable support for EXT2/3/4 filesystems with SPL. This permits 190 U-Boot (or Linux in Falcon mode) to be loaded from an EXT 191 filesystem from within SPL. Support for the underlying block 192 device (e.g. MMC or USB) must be enabled separately. 193 194config SPL_FAT_SUPPORT 195 bool "Support FAT filesystems" 196 depends on SPL 197 help 198 Enable support for FAT and VFAT filesystems with SPL. This 199 permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT 200 filesystem from within SPL. Support for the underlying block 201 device (e.g. MMC or USB) must be enabled separately. 202 203config SPL_FPGA_SUPPORT 204 bool "Support FPGAs" 205 depends on SPL 206 help 207 Enable support for FPGAs in SPL. Field-programmable Gate Arrays 208 provide software-configurable hardware which is typically used to 209 implement peripherals (such as UARTs, LCD displays, MMC) or 210 accelerate custom processing functions, such as image processing 211 or machine learning. Sometimes it is useful to program the FPGA 212 as early as possible during boot, and this option can enable that 213 within SPL. 214 215config SPL_GPIO_SUPPORT 216 bool "Support GPIO" 217 depends on SPL 218 help 219 Enable support for GPIOs (General-purpose Input/Output) in SPL. 220 GPIOs allow U-Boot to read the state of an input line (high or 221 low) and set the state of an output line. This can be used to 222 drive LEDs, control power to various system parts and read user 223 input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED, 224 for example. Enable this option to build the drivers in 225 drivers/gpio as part of an SPL build. 226 227config SPL_I2C_SUPPORT 228 bool "Support I2C" 229 depends on SPL 230 help 231 Enable support for the I2C (Inter-Integrated Circuit) bus in SPL. 232 I2C works with a clock and data line which can be driven by a 233 one or more masters or slaves. It is a fairly complex bus but is 234 widely used as it only needs two lines for communication. Speeds of 235 400kbps are typical but up to 3.4Mbps is supported by some 236 hardware. I2C can be useful in SPL to configure power management 237 ICs (PMICs) before raising the CPU clock speed, for example. 238 Enable this option to build the drivers in drivers/i2c as part of 239 an SPL build. 240 241config SPL_LIBCOMMON_SUPPORT 242 bool "Support common libraries" 243 depends on SPL 244 help 245 Enable support for common U-Boot libraries within SPL. These 246 libraries include common code to deal with U-Boot images, 247 environment and USB, for example. This option is enabled on many 248 boards. Enable this option to build the code in common/ as part of 249 an SPL build. 250 251config SPL_LIBDISK_SUPPORT 252 bool "Support disk paritions" 253 depends on SPL 254 help 255 Enable support for disk partitions within SPL. 'Disk' is something 256 of a misnomer as it includes non-spinning media such as flash (as 257 used in MMC and USB sticks). Partitions provide a way for a disk 258 to be split up into separate regions, with a partition table placed 259 at the start or end which describes the location and size of each 260 'partition'. These partitions are typically uses as individual block 261 devices, typically with an EXT2 or FAT filesystem in each. This 262 option enables whatever partition support has been enabled in 263 U-Boot to also be used in SPL. It brings in the code in disk/. 264 265config SPL_LIBGENERIC_SUPPORT 266 bool "Support generic libraries" 267 depends on SPL 268 help 269 Enable support for generic U-Boot libraries within SPL. These 270 libraries include generic code to deal with device tree, hashing, 271 printf(), compression and the like. This option is enabled on many 272 boards. Enable this option to build the code in lib/ as part of an 273 SPL build. 274 275config SPL_MMC_SUPPORT 276 bool "Support MMC" 277 depends on SPL 278 help 279 Enable support for MMC (Multimedia Card) within SPL. This enables 280 the MMC protocol implementation and allows any enabled drivers to 281 be used within SPL. MMC can be used with or without disk partition 282 support depending on the application (SPL_LIBDISK_SUPPORT). Enable 283 this option to build the drivers in drivers/mmc as part of an SPL 284 build. 285 286config SPL_MPC8XXX_INIT_DDR_SUPPORT 287 bool "Support MPC8XXX DDR init" 288 depends on SPL 289 help 290 Enable support for DDR-SDRAM (double-data-rate synchronous dynamic 291 random-access memory) on the MPC8XXX family within SPL. This 292 allows DRAM to be set up before loading U-Boot into that DRAM, 293 where it can run. 294 295config SPL_MTD_SUPPORT 296 bool "Support MTD drivers" 297 depends on SPL 298 help 299 Enable support for MTD (Memory Technology Device) within SPL. MTD 300 provides a block interface over raw NAND and can also be used with 301 SPI flash. This allows SPL to load U-Boot from supported MTD 302 devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how 303 to enable specific MTD drivers. 304 305config SPL_MUSB_NEW_SUPPORT 306 bool "Support new Mentor Graphics USB" 307 depends on SPL 308 help 309 Enable support for Mentor Graphics USB in SPL. This is a new 310 driver used by some boards. Enable this option to build 311 the drivers in drivers/usb/musb-new as part of an SPL build. The 312 old drivers are in drivers/usb/musb. 313 314config SPL_NAND_SUPPORT 315 bool "Support NAND flash" 316 depends on SPL 317 help 318 Enable support for NAND (Negative AND) flash in SPL. NAND flash 319 can be used to allow SPL to load U-Boot from supported devices. 320 This enables the drivers in drivers/mtd/nand as part of an SPL 321 build. 322 323config SPL_NET_SUPPORT 324 bool "Support networking" 325 depends on SPL 326 help 327 Enable support for network devices (such as Ethernet) in SPL. 328 This permits SPL to load U-Boot over a network link rather than 329 from an on-board peripheral. Environment support is required since 330 the network stack uses a number of environment variables. See also 331 SPL_ETH_SUPPORT. 332 333if SPL_NET_SUPPORT 334config SPL_NET_VCI_STRING 335 string "BOOTP Vendor Class Identifier string sent by SPL" 336 help 337 As defined by RFC 2132 the vendor class identifier field can be 338 sent by the client to identify the vendor type and configuration 339 of a client. This is often used in practice to allow for the DHCP 340 server to specify different files to load depending on if the ROM, 341 SPL or U-Boot itself makes the request 342endif # if SPL_NET_SUPPORT 343 344config SPL_NO_CPU_SUPPORT 345 bool "Drop CPU code in SPL" 346 depends on SPL 347 help 348 This is specific to the ARM926EJ-S CPU. It disables the standard 349 start.S start-up code, presumably so that a replacement can be 350 used on that CPU. You should not enable it unless you know what 351 you are doing. 352 353config SPL_NOR_SUPPORT 354 bool "Support NOR flash" 355 depends on SPL 356 help 357 Enable support for loading U-Boot from memory-mapped NOR (Negative 358 OR) flash in SPL. NOR flash is slow to write but fast to read, and 359 a memory-mapped device makes it very easy to access. Loading from 360 NOR is typically achieved with just a memcpy(). 361 362config SPL_ONENAND_SUPPORT 363 bool "Support OneNAND flash" 364 depends on SPL 365 help 366 Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is 367 a type of NAND flash and therefore can be used to allow SPL to 368 load U-Boot from supported devices. This enables the drivers in 369 drivers/mtd/onenand as part of an SPL build. 370 371config SPL_POST_MEM_SUPPORT 372 bool "Support POST drivers" 373 depends on SPL 374 help 375 Enable support for POST (Power-on Self Test) in SPL. POST is a 376 procedure that checks that the hardware (CPU or board) appears to 377 be functionally correctly. It is a sanity check that can be 378 performed before booting. This enables the drivers in post/drivers 379 as part of an SPL build. 380 381config SPL_POWER_SUPPORT 382 bool "Support power drivers" 383 depends on SPL 384 help 385 Enable support for power control in SPL. This includes support 386 for PMICs (Power-management Integrated Circuits) and some of the 387 features provided by PMICs. In particular, voltage regulators can 388 be used to enable/disable power and vary its voltage. That can be 389 useful in SPL to turn on boot peripherals and adjust CPU voltage 390 so that the clock speed can be increased. This enables the drivers 391 in drivers/power, drivers/power/pmic and drivers/power/regulator 392 as part of an SPL build. 393 394config SPL_SATA_SUPPORT 395 bool "Support loading from SATA" 396 depends on SPL 397 help 398 Enable support for SATA (Serial AT attachment) in SPL. This allows 399 use of SATA devices such as hard drives and flash drivers for 400 loading U-Boot. SATA is used in higher-end embedded systems and 401 can provide higher performance than MMC , at somewhat higher 402 expense and power consumption. This enables loading from SATA 403 using a configured device. 404 405config SPL_SERIAL_SUPPORT 406 bool "Support serial" 407 depends on SPL 408 help 409 Enable support for serial in SPL. This allows use of a serial UART 410 for displaying messages while SPL is running. It also brings in 411 printf() and panic() functions. This should normally be enabled 412 unless there are space reasons not to. Even then, consider 413 enabling USE_TINY_PRINTF which is a small printf() version. 414 415config SPL_SPI_FLASH_SUPPORT 416 bool "Support SPI flash drivers" 417 depends on SPL 418 help 419 Enable support for using SPI flash in SPL, and loading U-Boot from 420 SPI flash. SPI flash (Serial Peripheral Bus flash) is named after 421 the SPI bus that is used to connect it to a system. It is a simple 422 but fast bidirectional 4-wire bus (clock, chip select and two data 423 lines). This enables the drivers in drivers/mtd/spi as part of an 424 SPL build. This normally requires SPL_SPI_SUPPORT. 425 426config SPL_SPI_SUPPORT 427 bool "Support SPI drivers" 428 depends on SPL 429 help 430 Enable support for using SPI in SPL. This is used for connecting 431 to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for 432 more details on that. The SPI driver provides the transport for 433 data between the SPI flash and the CPU. This option can be used to 434 enable SPI drivers that are needed for other purposes also, such 435 as a SPI PMIC. 436 437config SPL_USBETH_SUPPORT 438 bool "Support USB Ethernet drivers" 439 depends on SPL 440 help 441 Enable access to the USB network subsystem and associated 442 drivers in SPL. This permits SPL to load U-Boot over a 443 USB-connected Ethernet link (such as a USB Ethernet dongle) rather 444 than from an onboard peripheral. Environment support is required 445 since the network stack uses a number of environment variables. 446 See also SPL_NET_SUPPORT and SPL_ETH_SUPPORT. 447 448config SPL_USB_HOST_SUPPORT 449 bool "Support USB host drivers" 450 depends on SPL 451 help 452 Enable access to USB (Universal Serial Bus) host devices so that 453 SPL can load U-Boot from a connected USB peripheral, such as a USB 454 flash stick. While USB takes a little longer to start up than most 455 buses, it is very flexible since many different types of storage 456 device can be attached. This option enables the drivers in 457 drivers/usb/host as part of an SPL build. 458 459config SPL_USB_SUPPORT 460 bool "Support loading from USB" 461 depends on SPL_USB_HOST_SUPPORT 462 help 463 Enable support for USB devices in SPL. This allows use of USB 464 devices such as hard drives and flash drivers for loading U-Boot. 465 The actual drivers are enabled separately using the normal U-Boot 466 config options. This enables loading from USB using a configured 467 device. 468 469config SPL_WATCHDOG_SUPPORT 470 bool "Support watchdog drivers" 471 depends on SPL 472 help 473 Enable support for watchdog drivers in SPL. A watchdog is 474 typically a hardware peripheral which can reset the system when it 475 detects no activity for a while (such as a software crash). This 476 enables the drivers in drivers/watchdog as part of an SPL build. 477 478config SPL_YMODEM_SUPPORT 479 bool "Support loading using Ymodem" 480 depends on SPL 481 help 482 While loading from serial is slow it can be a useful backup when 483 there is no other option. The Ymodem protocol provides a reliable 484 means of transmitting U-Boot over a serial line for using in SPL, 485 with a checksum to ensure correctness. 486 487config TPL_ENV_SUPPORT 488 bool "Support an environment" 489 depends on TPL 490 help 491 Enable environment support in TPL. See SPL_ENV_SUPPORT for details. 492 493config TPL_I2C_SUPPORT 494 bool "Support I2C" 495 depends on TPL 496 help 497 Enable support for the I2C bus in SPL. See SPL_I2C_SUPPORT for 498 details. 499 500config TPL_LIBCOMMON_SUPPORT 501 bool "Support common libraries" 502 depends on TPL 503 help 504 Enable support for common U-Boot libraries within TPL. See 505 SPL_LIBCOMMON_SUPPORT for details. 506 507config TPL_LIBGENERIC_SUPPORT 508 bool "Support generic libraries" 509 depends on TPL 510 help 511 Enable support for generic U-Boot libraries within TPL. See 512 SPL_LIBGENERIC_SUPPORT for details. 513 514config TPL_MPC8XXX_INIT_DDR_SUPPORT 515 bool "Support MPC8XXX DDR init" 516 depends on TPL 517 help 518 Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See 519 SPL_MPC8XXX_INIT_DDR_SUPPORT for details. 520 521config TPL_MMC_SUPPORT 522 bool "Support MMC" 523 depends on TPL 524 help 525 Enable support for MMC within TPL. See SPL_MMC_SUPPORT for details. 526 527config TPL_NAND_SUPPORT 528 bool "Support NAND flash" 529 depends on TPL 530 help 531 Enable support for NAND in SPL. See SPL_NAND_SUPPORT for details. 532 533config TPL_SERIAL_SUPPORT 534 bool "Support serial" 535 depends on TPL 536 help 537 Enable support for serial in SPL. See SPL_SERIAL_SUPPORT for 538 details. 539 540config TPL_SPI_FLASH_SUPPORT 541 bool "Support SPI flash drivers" 542 depends on TPL 543 help 544 Enable support for using SPI flash in SPL. See SPL_SPI_FLASH_SUPPORT 545 for details. 546 547config TPL_SPI_SUPPORT 548 bool "Support SPI drivers" 549 depends on TPL 550 help 551 Enable support for using SPI in SPL. See SPL_SPI_SUPPORT for 552 details. 553 554endmenu 555