1menu "Library routines" 2 3config ADDR_MAP 4 bool "Enable support for non-identity virtual-physical mappings" 5 help 6 Enables helper code for implementing non-identity virtual-physical 7 memory mappings for 32bit CPUs. 8 9 This library only works in the post-relocation phase. 10 11config SYS_NUM_ADDR_MAP 12 int "Size of the address-map table" 13 depends on ADDR_MAP 14 default 16 15 help 16 Sets the number of entries in the virtual-physical mapping table. 17 18config BCH 19 bool "Enable Software based BCH ECC" 20 help 21 Enables software based BCH ECC algorithm present in lib/bch.c 22 This is used by SoC platforms which do not have built-in ELM 23 hardware engine required for BCH ECC correction. 24 25config BINMAN_FDT 26 bool "Allow access to binman information in the device tree" 27 depends on BINMAN && DM && OF_CONTROL 28 default y 29 help 30 This enables U-Boot to access information about binman entries, 31 stored in the device tree in a binman node. Typical uses are to 32 locate entries in the firmware image. See binman.h for the available 33 functionality. 34 35config CC_OPTIMIZE_LIBS_FOR_SPEED 36 bool "Optimize libraries for speed" 37 help 38 Enabling this option will pass "-O2" to gcc when compiling 39 under "lib" directory. 40 41 If unsure, say N. 42 43config DYNAMIC_CRC_TABLE 44 bool "Enable Dynamic tables for CRC" 45 help 46 Enable this option to calculate entries for CRC tables at runtime. 47 This can be helpful when reducing the size of the build image 48 49config HAVE_ARCH_IOMAP 50 bool 51 help 52 Enable this option if architecture provides io{read,write}{8,16,32} 53 I/O accessor functions. 54 55config HAVE_PRIVATE_LIBGCC 56 bool 57 58config LIB_UUID 59 bool 60 61config PRINTF 62 bool 63 default y 64 65config SPL_PRINTF 66 bool 67 select SPL_SPRINTF 68 select SPL_STRTO if !SPL_USE_TINY_PRINTF 69 70config TPL_PRINTF 71 bool 72 select TPL_SPRINTF 73 select TPL_STRTO if !TPL_USE_TINY_PRINTF 74 75config SPRINTF 76 bool 77 default y 78 79config SPL_SPRINTF 80 bool 81 82config TPL_SPRINTF 83 bool 84 85config SSCANF 86 bool 87 default n 88 89config STRTO 90 bool 91 default y 92 93config SPL_STRTO 94 bool 95 96config TPL_STRTO 97 bool 98 99config IMAGE_SPARSE 100 bool 101 102config IMAGE_SPARSE_FILLBUF_SIZE 103 hex "Android sparse image CHUNK_TYPE_FILL buffer size" 104 default 0x80000 105 depends on IMAGE_SPARSE 106 help 107 Set the size of the fill buffer used when processing CHUNK_TYPE_FILL 108 chunks. 109 110config USE_PRIVATE_LIBGCC 111 bool "Use private libgcc" 112 depends on HAVE_PRIVATE_LIBGCC 113 default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS) 114 help 115 This option allows you to use the built-in libgcc implementation 116 of U-Boot instead of the one provided by the compiler. 117 If unsure, say N. 118 119config SYS_HZ 120 int 121 default 1000 122 help 123 The frequency of the timer returned by get_timer(). 124 get_timer() must operate in milliseconds and this option must be 125 set to 1000. 126 127config SPL_USE_TINY_PRINTF 128 bool "Enable tiny printf() version in SPL" 129 depends on SPL 130 default y 131 help 132 This option enables a tiny, stripped down printf version. 133 This should only be used in space limited environments, 134 like SPL versions with hard memory limits. This version 135 reduces the code size by about 2.5KiB on armv7. 136 137 The supported format specifiers are %c, %s, %u/%d and %x. 138 139config TPL_USE_TINY_PRINTF 140 bool "Enable tiny printf() version in TPL" 141 depends on TPL 142 default y if SPL_USE_TINY_PRINTF 143 help 144 This option enables a tiny, stripped down printf version. 145 This should only be used in space limited environments, 146 like SPL versions with hard memory limits. This version 147 reduces the code size by about 2.5KiB on armv7. 148 149 The supported format specifiers are %c, %s, %u/%d and %x. 150 151config PANIC_HANG 152 bool "Do not reset the system on fatal error" 153 help 154 Define this option to stop the system in case of a fatal error, 155 so that you have to reset it manually. This is probably NOT a good 156 idea for an embedded system where you want the system to reboot 157 automatically as fast as possible, but it may be useful during 158 development since you can try to debug the conditions that lead to 159 the situation. 160 161config REGEX 162 bool "Enable regular expression support" 163 default y if NET 164 help 165 If this variable is defined, U-Boot is linked against the 166 SLRE (Super Light Regular Expression) library, which adds 167 regex support to some commands, for example "env grep" and 168 "setexpr". 169 170choice 171 prompt "Pseudo-random library support type" 172 depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID || \ 173 RNG_SANDBOX || UT_LIB && AES || FAT_WRITE 174 default LIB_RAND 175 help 176 Select the library to provide pseudo-random number generator 177 functions. LIB_HW_RAND supports certain hardware engines that 178 provide this functionality. If in doubt, select LIB_RAND. 179 180config LIB_RAND 181 bool "Pseudo-random library support" 182 183config LIB_HW_RAND 184 bool "HW Engine for random library support" 185 186endchoice 187 188config SPL_TINY_MEMSET 189 bool "Use a very small memset() in SPL" 190 help 191 The faster memset() is the arch-specific one (if available) enabled 192 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get 193 better performance by writing a word at a time. But in very 194 size-constrained environments even this may be too big. Enable this 195 option to reduce code size slightly at the cost of some speed. 196 197config TPL_TINY_MEMSET 198 bool "Use a very small memset() in TPL" 199 help 200 The faster memset() is the arch-specific one (if available) enabled 201 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get 202 better performance by writing a word at a time. But in very 203 size-constrained environments even this may be too big. Enable this 204 option to reduce code size slightly at the cost of some speed. 205 206config RBTREE 207 bool 208 209config BITREVERSE 210 bool "Bit reverse library from Linux" 211 212config TRACE 213 bool "Support for tracing of function calls and timing" 214 imply CMD_TRACE 215 select TIMER_EARLY 216 help 217 Enables function tracing within U-Boot. This allows recording of call 218 traces including timing information. The command can write data to 219 memory for exporting for analysis (e.g. using bootchart). 220 See doc/README.trace for full details. 221 222config TRACE_BUFFER_SIZE 223 hex "Size of trace buffer in U-Boot" 224 depends on TRACE 225 default 0x01000000 226 help 227 Sets the size of the trace buffer in U-Boot. This is allocated from 228 memory during relocation. If this buffer is too small, the trace 229 history will be truncated, with later records omitted. 230 231 If early trace is enabled (i.e. before relocation), this buffer must 232 be large enough to include all the data from the early trace buffer as 233 well, since this is copied over to the main buffer during relocation. 234 235 A trace record is emitted for each function call and each record is 236 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If 237 the size is too small then 'trace stats' will show a message saying 238 how many records were dropped due to buffer overflow. 239 240config TRACE_CALL_DEPTH_LIMIT 241 int "Trace call depth limit" 242 depends on TRACE 243 default 15 244 help 245 Sets the maximum call depth up to which function calls are recorded. 246 247config TRACE_EARLY 248 bool "Enable tracing before relocation" 249 depends on TRACE 250 help 251 Sometimes it is helpful to trace execution of U-Boot before 252 relocation. This is possible by using a arch-specific, fixed buffer 253 position in memory. Enable this option to start tracing as early as 254 possible after U-Boot starts. 255 256config TRACE_EARLY_SIZE 257 hex "Size of early trace buffer in U-Boot" 258 depends on TRACE_EARLY 259 default 0x00100000 260 help 261 Sets the size of the early trace buffer in bytes. This is used to hold 262 tracing information before relocation. 263 264config TRACE_EARLY_CALL_DEPTH_LIMIT 265 int "Early trace call depth limit" 266 depends on TRACE_EARLY 267 default 200 268 help 269 Sets the maximum call depth up to which function calls are recorded 270 during early tracing. 271 272config TRACE_EARLY_ADDR 273 hex "Address of early trace buffer in U-Boot" 274 depends on TRACE_EARLY 275 default 0x00100000 276 help 277 Sets the address of the early trace buffer in U-Boot. This memory 278 must be accessible before relocation. 279 280 A trace record is emitted for each function call and each record is 281 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If 282 the size is too small then the message which says the amount of early 283 data being coped will the the same as the 284 285source lib/dhry/Kconfig 286 287menu "Security support" 288 289config AES 290 bool "Support the AES algorithm" 291 help 292 This provides a means to encrypt and decrypt data using the AES 293 (Advanced Encryption Standard). This algorithm uses a symetric key 294 and is widely used as a streaming cipher. Different key lengths are 295 supported by the algorithm but only a 128-bit key is supported at 296 present. 297 298source lib/rsa/Kconfig 299source lib/crypto/Kconfig 300 301config TPM 302 bool "Trusted Platform Module (TPM) Support" 303 depends on DM 304 help 305 This enables support for TPMs which can be used to provide security 306 features for your board. The TPM can be connected via LPC or I2C 307 and a sandbox TPM is provided for testing purposes. Use the 'tpm' 308 command to interactive the TPM. Driver model support is provided 309 for the low-level TPM interface, but only one TPM is supported at 310 a time by the TPM library. 311 312config SPL_TPM 313 bool "Trusted Platform Module (TPM) Support in SPL" 314 depends on SPL_DM 315 help 316 This enables support for TPMs which can be used to provide security 317 features for your board. The TPM can be connected via LPC or I2C 318 and a sandbox TPM is provided for testing purposes. Use the 'tpm' 319 command to interactive the TPM. Driver model support is provided 320 for the low-level TPM interface, but only one TPM is supported at 321 a time by the TPM library. 322 323config TPL_TPM 324 bool "Trusted Platform Module (TPM) Support in TPL" 325 depends on TPL_DM 326 help 327 This enables support for TPMs which can be used to provide security 328 features for your board. The TPM can be connected via LPC or I2C 329 and a sandbox TPM is provided for testing purposes. Use the 'tpm' 330 command to interactive the TPM. Driver model support is provided 331 for the low-level TPM interface, but only one TPM is supported at 332 a time by the TPM library. 333 334endmenu 335 336menu "Android Verified Boot" 337 338config LIBAVB 339 bool "Android Verified Boot 2.0 support" 340 depends on ANDROID_BOOT_IMAGE 341 default n 342 help 343 This enables support of Android Verified Boot 2.0 which can be used 344 to assure the end user of the integrity of the software running on a 345 device. Introduces such features as boot chain of trust, rollback 346 protection etc. 347 348endmenu 349 350menu "Hashing Support" 351 352config SHA1 353 bool "Enable SHA1 support" 354 help 355 This option enables support of hashing using SHA1 algorithm. 356 The hash is calculated in software. 357 The SHA1 algorithm produces a 160-bit (20-byte) hash value 358 (digest). 359 360config SHA256 361 bool "Enable SHA256 support" 362 help 363 This option enables support of hashing using SHA256 algorithm. 364 The hash is calculated in software. 365 The SHA256 algorithm produces a 256-bit (32-byte) hash value 366 (digest). 367 368config SHA512_ALGO 369 bool "Enable SHA512 algorithm" 370 help 371 This option enables support of internal SHA512 algorithm. 372 373config SHA512 374 bool "Enable SHA512 support" 375 depends on SHA512_ALGO 376 help 377 This option enables support of hashing using SHA512 algorithm. 378 The hash is calculated in software. 379 The SHA512 algorithm produces a 512-bit (64-byte) hash value 380 (digest). 381 382config SHA384 383 bool "Enable SHA384 support" 384 depends on SHA512_ALGO 385 help 386 This option enables support of hashing using SHA384 algorithm. 387 The hash is calculated in software. 388 The SHA384 algorithm produces a 384-bit (48-byte) hash value 389 (digest). 390 391config SHA_HW_ACCEL 392 bool "Enable hashing using hardware" 393 help 394 This option enables hardware acceleration 395 for SHA1/SHA256 hashing. 396 This affects the 'hash' command and also the 397 hash_lookup_algo() function. 398 399config SHA_PROG_HW_ACCEL 400 bool "Enable Progressive hashing support using hardware" 401 depends on SHA_HW_ACCEL 402 help 403 This option enables hardware-acceleration for 404 SHA1/SHA256 progressive hashing. 405 Data can be streamed in a block at a time and the hashing 406 is performed in hardware. 407 408config MD5 409 bool "Support MD5 algorithm" 410 help 411 This option enables MD5 support. MD5 is an algorithm designed 412 in 1991 that produces a 16-byte digest (or checksum) from its input 413 data. It has a number of vulnerabilities which preclude its use in 414 security applications, but it can be useful for providing a quick 415 checksum of a block of data. 416 417config SPL_MD5 418 bool "Support MD5 algorithm in SPL" 419 help 420 This option enables MD5 support in SPL. MD5 is an algorithm designed 421 in 1991 that produces a 16-byte digest (or checksum) from its input 422 data. It has a number of vulnerabilities which preclude its use in 423 security applications, but it can be useful for providing a quick 424 checksum of a block of data. 425 426config CRC32C 427 bool 428 429config XXHASH 430 bool 431 432endmenu 433 434menu "Compression Support" 435 436config LZ4 437 bool "Enable LZ4 decompression support" 438 help 439 If this option is set, support for LZ4 compressed images 440 is included. The LZ4 algorithm can run in-place as long as the 441 compressed image is loaded to the end of the output buffer, and 442 trades lower compression ratios for much faster decompression. 443 444 NOTE: This implements the release version of the LZ4 frame 445 format as generated by default by the 'lz4' command line tool. 446 This is not the same as the outdated, less efficient legacy 447 frame format currently (2015) implemented in the Linux kernel 448 (generated by 'lz4 -l'). The two formats are incompatible. 449 450config LZMA 451 bool "Enable LZMA decompression support" 452 help 453 This enables support for LZMA (Lempel-Ziv-Markov chain algorithm), 454 a dictionary compression algorithm that provides a high compression 455 ratio and fairly fast decompression speed. See also 456 CONFIG_CMD_LZMADEC which provides a decode command. 457 458config LZO 459 bool "Enable LZO decompression support" 460 help 461 This enables support for LZO compression algorithm.r 462 463config GZIP 464 bool "Enable gzip decompression support" 465 select ZLIB 466 default y 467 help 468 This enables support for GZIP compression algorithm. 469 470config ZLIB_UNCOMPRESS 471 bool "Enables zlib's uncompress() functionality" 472 help 473 This enables an extra zlib functionality: the uncompress() function, 474 which decompresses data from a buffer into another, knowing their 475 sizes. Unlike gunzip(), there is no header parsing. 476 477config GZIP_COMPRESSED 478 bool 479 select ZLIB 480 481config BZIP2 482 bool "Enable bzip2 decompression support" 483 help 484 This enables support for BZIP2 compression algorithm. 485 486config ZLIB 487 bool 488 default y 489 help 490 This enables ZLIB compression lib. 491 492config ZSTD 493 bool "Enable Zstandard decompression support" 494 select XXHASH 495 help 496 This enables Zstandard decompression library. 497 498config SPL_LZ4 499 bool "Enable LZ4 decompression support in SPL" 500 help 501 This enables support for the LZ4 decompression algorithm in SPL. LZ4 502 is a lossless data compression algorithm that is focused on 503 fast compression and decompression speed. It belongs to the LZ77 504 family of byte-oriented compression schemes. 505 506config SPL_LZMA 507 bool "Enable LZMA decompression support for SPL build" 508 help 509 This enables support for LZMA compression algorithm for SPL boot. 510 511config SPL_LZO 512 bool "Enable LZO decompression support in SPL" 513 help 514 This enables support for LZO compression algorithm in the SPL. 515 516config SPL_GZIP 517 bool "Enable gzip decompression support for SPL build" 518 select SPL_ZLIB 519 help 520 This enables support for GZIP compression altorithm for SPL boot. 521 522config SPL_ZLIB 523 bool 524 help 525 This enables compression lib for SPL boot. 526 527config SPL_ZSTD 528 bool "Enable Zstandard decompression support in SPL" 529 select XXHASH 530 help 531 This enables Zstandard decompression library in the SPL. 532 533endmenu 534 535config ERRNO_STR 536 bool "Enable function for getting errno-related string message" 537 help 538 The function errno_str(int errno), returns a pointer to the errno 539 corresponding text message: 540 - if errno is null or positive number - a pointer to "Success" message 541 - if errno is negative - a pointer to errno related message 542 543config HEXDUMP 544 bool "Enable hexdump" 545 help 546 This enables functions for printing dumps of binary data. 547 548config SPL_HEXDUMP 549 bool "Enable hexdump in SPL" 550 depends on HEXDUMP 551 default y 552 help 553 This enables functions for printing dumps of binary data in 554 SPL. 555 556config GETOPT 557 bool "Enable getopt" 558 help 559 This enables functions for parsing command-line options. 560 561config OF_LIBFDT 562 bool "Enable the FDT library" 563 default y if OF_CONTROL 564 help 565 This enables the FDT library (libfdt). It provides functions for 566 accessing binary device tree images in memory, such as adding and 567 removing nodes and properties, scanning through the tree and finding 568 particular compatible nodes. The library operates on a flattened 569 version of the device tree. 570 571config OF_LIBFDT_ASSUME_MASK 572 hex "Mask of conditions to assume for libfdt" 573 depends on OF_LIBFDT || FIT 574 default 0 575 help 576 Use this to change the assumptions made by libfdt about the 577 device tree it is working with. A value of 0 means that no assumptions 578 are made, and libfdt is able to deal with malicious data. A value of 579 0xff means all assumptions are made and any invalid data may cause 580 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h 581 582config OF_LIBFDT_OVERLAY 583 bool "Enable the FDT library overlay support" 584 depends on OF_LIBFDT 585 default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE 586 help 587 This enables the FDT library (libfdt) overlay support. 588 589config SPL_OF_LIBFDT 590 bool "Enable the FDT library for SPL" 591 default y if SPL_OF_CONTROL 592 help 593 This enables the FDT library (libfdt). It provides functions for 594 accessing binary device tree images in memory, such as adding and 595 removing nodes and properties, scanning through the tree and finding 596 particular compatible nodes. The library operates on a flattened 597 version of the device tree. 598 599config SPL_OF_LIBFDT_ASSUME_MASK 600 hex "Mask of conditions to assume for libfdt" 601 depends on SPL_OF_LIBFDT || FIT 602 default 0xff 603 help 604 Use this to change the assumptions made by libfdt in SPL about the 605 device tree it is working with. A value of 0 means that no assumptions 606 are made, and libfdt is able to deal with malicious data. A value of 607 0xff means all assumptions are made and any invalid data may cause 608 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h 609 610config TPL_OF_LIBFDT 611 bool "Enable the FDT library for TPL" 612 default y if TPL_OF_CONTROL 613 help 614 This enables the FDT library (libfdt). It provides functions for 615 accessing binary device tree images in memory, such as adding and 616 removing nodes and properties, scanning through the tree and finding 617 particular compatible nodes. The library operates on a flattened 618 version of the device tree. 619 620config TPL_OF_LIBFDT_ASSUME_MASK 621 hex "Mask of conditions to assume for libfdt" 622 depends on TPL_OF_LIBFDT || FIT 623 default 0xff 624 help 625 Use this to change the assumptions made by libfdt in TPL about the 626 device tree it is working with. A value of 0 means that no assumptions 627 are made, and libfdt is able to deal with malicious data. A value of 628 0xff means all assumptions are made and any invalid data may cause 629 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h 630 631config FDT_FIXUP_PARTITIONS 632 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'" 633 depends on OF_LIBFDT 634 depends on CMD_MTDPARTS 635 help 636 Allow overwriting defined partitions in the device tree blob 637 using partition info defined in the 'mtdparts' environment 638 variable. 639 640menu "System tables" 641 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER) 642 643config BLOBLIST_TABLES 644 bool "Put tables in a bloblist" 645 depends on X86 646 help 647 Normally tables are placed at address 0xf0000 and can be up to 64KB 648 long. With this option, tables are instead placed in the bloblist 649 with a pointer from 0xf0000. The size can then be larger and the 650 tables can be placed high in memory. 651 652config GENERATE_SMBIOS_TABLE 653 bool "Generate an SMBIOS (System Management BIOS) table" 654 default y 655 depends on X86 || EFI_LOADER 656 help 657 The System Management BIOS (SMBIOS) specification addresses how 658 motherboard and system vendors present management information about 659 their products in a standard format by extending the BIOS interface 660 on Intel architecture systems. 661 662 Check http://www.dmtf.org/standards/smbios for details. 663 664 See also SMBIOS_SYSINFO which allows SMBIOS values to be provided in 665 the devicetree. 666 667endmenu 668 669config ASN1_COMPILER 670 bool 671 672config ASN1_DECODER 673 bool 674 help 675 Enable asn1 decoder library. 676 677config OID_REGISTRY 678 bool 679 help 680 Enable fast lookup object identifier registry. 681 682config SMBIOS_PARSER 683 bool "SMBIOS parser" 684 help 685 A simple parser for SMBIOS data. 686 687source lib/efi/Kconfig 688source lib/efi_loader/Kconfig 689source lib/optee/Kconfig 690 691config TEST_FDTDEC 692 bool "enable fdtdec test" 693 depends on OF_LIBFDT 694 695config LIB_DATE 696 bool 697 698config LIB_ELF 699 bool 700 help 701 Support basic elf loading/validating functions. 702 This supports for 32 bit and 64 bit versions. 703 704endmenu 705 706config PHANDLE_CHECK_SEQ 707 bool "Enable phandle check while getting sequence number" 708 default n 709 help 710 When there are multiple device tree nodes with same name, 711 enable this config option to distinguish them using 712 phandles in fdtdec_get_alias_seq() function. 713