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