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 if OF_SEPARATE || OF_EMBED 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 hardware acceleration for SHA hash functions" 393 help 394 This option enables hardware acceleration for the SHA1 and SHA256 395 hashing algorithms. This affects the 'hash' command and also the 396 hash_lookup_algo() function. 397 398if SHA_HW_ACCEL 399 400config SHA512_HW_ACCEL 401 bool "Enable hardware acceleration for SHA512" 402 depends on SHA512_ALGO 403 help 404 This option enables hardware acceleration for the SHA384 and SHA512 405 hashing algorithms. This affects the 'hash' command and also the 406 hash_lookup_algo() function. 407 408config SHA_PROG_HW_ACCEL 409 bool "Enable Progressive hashing support using hardware" 410 help 411 This option enables hardware-acceleration for SHA progressive 412 hashing. 413 Data can be streamed in a block at a time and the hashing is 414 performed in hardware. 415 416endif 417 418config MD5 419 bool "Support MD5 algorithm" 420 help 421 This option enables MD5 support. MD5 is an algorithm designed 422 in 1991 that produces a 16-byte digest (or checksum) from its input 423 data. It has a number of vulnerabilities which preclude its use in 424 security applications, but it can be useful for providing a quick 425 checksum of a block of data. 426 427config SPL_MD5 428 bool "Support MD5 algorithm in SPL" 429 help 430 This option enables MD5 support in SPL. MD5 is an algorithm designed 431 in 1991 that produces a 16-byte digest (or checksum) from its input 432 data. It has a number of vulnerabilities which preclude its use in 433 security applications, but it can be useful for providing a quick 434 checksum of a block of data. 435 436config CRC32C 437 bool 438 439config XXHASH 440 bool 441 442endmenu 443 444menu "Compression Support" 445 446config LZ4 447 bool "Enable LZ4 decompression support" 448 help 449 If this option is set, support for LZ4 compressed images 450 is included. The LZ4 algorithm can run in-place as long as the 451 compressed image is loaded to the end of the output buffer, and 452 trades lower compression ratios for much faster decompression. 453 454 NOTE: This implements the release version of the LZ4 frame 455 format as generated by default by the 'lz4' command line tool. 456 This is not the same as the outdated, less efficient legacy 457 frame format currently (2015) implemented in the Linux kernel 458 (generated by 'lz4 -l'). The two formats are incompatible. 459 460config LZMA 461 bool "Enable LZMA decompression support" 462 help 463 This enables support for LZMA (Lempel-Ziv-Markov chain algorithm), 464 a dictionary compression algorithm that provides a high compression 465 ratio and fairly fast decompression speed. See also 466 CONFIG_CMD_LZMADEC which provides a decode command. 467 468config LZO 469 bool "Enable LZO decompression support" 470 help 471 This enables support for LZO compression algorithm.r 472 473config GZIP 474 bool "Enable gzip decompression support" 475 select ZLIB 476 default y 477 help 478 This enables support for GZIP compression algorithm. 479 480config ZLIB_UNCOMPRESS 481 bool "Enables zlib's uncompress() functionality" 482 help 483 This enables an extra zlib functionality: the uncompress() function, 484 which decompresses data from a buffer into another, knowing their 485 sizes. Unlike gunzip(), there is no header parsing. 486 487config GZIP_COMPRESSED 488 bool 489 select ZLIB 490 491config BZIP2 492 bool "Enable bzip2 decompression support" 493 help 494 This enables support for BZIP2 compression algorithm. 495 496config ZLIB 497 bool 498 default y 499 help 500 This enables ZLIB compression lib. 501 502config ZSTD 503 bool "Enable Zstandard decompression support" 504 select XXHASH 505 help 506 This enables Zstandard decompression library. 507 508config SPL_LZ4 509 bool "Enable LZ4 decompression support in SPL" 510 help 511 This enables support for the LZ4 decompression algorithm in SPL. LZ4 512 is a lossless data compression algorithm that is focused on 513 fast compression and decompression speed. It belongs to the LZ77 514 family of byte-oriented compression schemes. 515 516config SPL_LZMA 517 bool "Enable LZMA decompression support for SPL build" 518 help 519 This enables support for LZMA compression algorithm for SPL boot. 520 521config SPL_LZO 522 bool "Enable LZO decompression support in SPL" 523 help 524 This enables support for LZO compression algorithm in the SPL. 525 526config SPL_GZIP 527 bool "Enable gzip decompression support for SPL build" 528 select SPL_ZLIB 529 help 530 This enables support for GZIP compression altorithm for SPL boot. 531 532config SPL_ZLIB 533 bool 534 help 535 This enables compression lib for SPL boot. 536 537config SPL_ZSTD 538 bool "Enable Zstandard decompression support in SPL" 539 select XXHASH 540 help 541 This enables Zstandard decompression library in the SPL. 542 543endmenu 544 545config ERRNO_STR 546 bool "Enable function for getting errno-related string message" 547 help 548 The function errno_str(int errno), returns a pointer to the errno 549 corresponding text message: 550 - if errno is null or positive number - a pointer to "Success" message 551 - if errno is negative - a pointer to errno related message 552 553config HEXDUMP 554 bool "Enable hexdump" 555 help 556 This enables functions for printing dumps of binary data. 557 558config SPL_HEXDUMP 559 bool "Enable hexdump in SPL" 560 depends on HEXDUMP 561 default y 562 help 563 This enables functions for printing dumps of binary data in 564 SPL. 565 566config GETOPT 567 bool "Enable getopt" 568 help 569 This enables functions for parsing command-line options. 570 571config OF_LIBFDT 572 bool "Enable the FDT library" 573 default y if OF_CONTROL 574 help 575 This enables the FDT library (libfdt). It provides functions for 576 accessing binary device tree images in memory, such as adding and 577 removing nodes and properties, scanning through the tree and finding 578 particular compatible nodes. The library operates on a flattened 579 version of the device tree. 580 581config OF_LIBFDT_ASSUME_MASK 582 hex "Mask of conditions to assume for libfdt" 583 depends on OF_LIBFDT || FIT 584 default 0 585 help 586 Use this to change the assumptions made by libfdt about the 587 device tree it is working with. A value of 0 means that no assumptions 588 are made, and libfdt is able to deal with malicious data. A value of 589 0xff means all assumptions are made and any invalid data may cause 590 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h 591 592config OF_LIBFDT_OVERLAY 593 bool "Enable the FDT library overlay support" 594 depends on OF_LIBFDT 595 default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE 596 help 597 This enables the FDT library (libfdt) overlay support. 598 599config SPL_OF_LIBFDT 600 bool "Enable the FDT library for SPL" 601 default y if SPL_OF_CONTROL 602 help 603 This enables the FDT library (libfdt). It provides functions for 604 accessing binary device tree images in memory, such as adding and 605 removing nodes and properties, scanning through the tree and finding 606 particular compatible nodes. The library operates on a flattened 607 version of the device tree. 608 609config SPL_OF_LIBFDT_ASSUME_MASK 610 hex "Mask of conditions to assume for libfdt" 611 depends on SPL_OF_LIBFDT || FIT 612 default 0xff 613 help 614 Use this to change the assumptions made by libfdt in SPL about the 615 device tree it is working with. A value of 0 means that no assumptions 616 are made, and libfdt is able to deal with malicious data. A value of 617 0xff means all assumptions are made and any invalid data may cause 618 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h 619 620config TPL_OF_LIBFDT 621 bool "Enable the FDT library for TPL" 622 default y if TPL_OF_CONTROL 623 help 624 This enables the FDT library (libfdt). It provides functions for 625 accessing binary device tree images in memory, such as adding and 626 removing nodes and properties, scanning through the tree and finding 627 particular compatible nodes. The library operates on a flattened 628 version of the device tree. 629 630config TPL_OF_LIBFDT_ASSUME_MASK 631 hex "Mask of conditions to assume for libfdt" 632 depends on TPL_OF_LIBFDT || FIT 633 default 0xff 634 help 635 Use this to change the assumptions made by libfdt in TPL about the 636 device tree it is working with. A value of 0 means that no assumptions 637 are made, and libfdt is able to deal with malicious data. A value of 638 0xff means all assumptions are made and any invalid data may cause 639 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h 640 641config FDT_FIXUP_PARTITIONS 642 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'" 643 depends on OF_LIBFDT 644 depends on CMD_MTDPARTS 645 help 646 Allow overwriting defined partitions in the device tree blob 647 using partition info defined in the 'mtdparts' environment 648 variable. 649 650menu "System tables" 651 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER) 652 653config BLOBLIST_TABLES 654 bool "Put tables in a bloblist" 655 depends on X86 && BLOBLIST 656 help 657 Normally tables are placed at address 0xf0000 and can be up to 64KB 658 long. With this option, tables are instead placed in the bloblist 659 with a pointer from 0xf0000. The size can then be larger and the 660 tables can be placed high in memory. 661 662config GENERATE_SMBIOS_TABLE 663 bool "Generate an SMBIOS (System Management BIOS) table" 664 default y 665 depends on X86 || EFI_LOADER 666 help 667 The System Management BIOS (SMBIOS) specification addresses how 668 motherboard and system vendors present management information about 669 their products in a standard format by extending the BIOS interface 670 on Intel architecture systems. 671 672 Check http://www.dmtf.org/standards/smbios for details. 673 674 See also SMBIOS_SYSINFO which allows SMBIOS values to be provided in 675 the devicetree. 676 677endmenu 678 679config ASN1_COMPILER 680 bool 681 682config ASN1_DECODER 683 bool 684 help 685 Enable asn1 decoder library. 686 687config OID_REGISTRY 688 bool 689 help 690 Enable fast lookup object identifier registry. 691 692config SMBIOS_PARSER 693 bool "SMBIOS parser" 694 help 695 A simple parser for SMBIOS data. 696 697source lib/efi/Kconfig 698source lib/efi_loader/Kconfig 699source lib/optee/Kconfig 700 701config TEST_FDTDEC 702 bool "enable fdtdec test" 703 depends on OF_LIBFDT 704 705config LIB_DATE 706 bool 707 708config LIB_ELF 709 bool 710 help 711 Support basic elf loading/validating functions. 712 This supports for 32 bit and 64 bit versions. 713 714config LMB 715 bool "Enable the logical memory blocks library (lmb)" 716 default y if ARC || ARM || M68K || MICROBLAZE || MIPS || NDS32 || \ 717 NIOS2 || PPC || RISCV || SANDBOX || SH || X86 || XTENSA 718 help 719 Support the library logical memory blocks. 720 721config LMB_USE_MAX_REGIONS 722 bool "Use a commun number of memory and reserved regions in lmb lib" 723 depends on LMB 724 default y 725 help 726 Define the number of supported memory regions in the library logical 727 memory blocks. 728 This feature allow to reduce the lmb library size by using compiler 729 optimization when LMB_MEMORY_REGIONS == LMB_RESERVED_REGIONS. 730 731config LMB_MAX_REGIONS 732 int "Number of memory and reserved regions in lmb lib" 733 depends on LMB && LMB_USE_MAX_REGIONS 734 default 8 735 help 736 Define the number of supported regions, memory and reserved, in the 737 library logical memory blocks. 738 739config LMB_MEMORY_REGIONS 740 int "Number of memory regions in lmb lib" 741 depends on LMB && !LMB_USE_MAX_REGIONS 742 default 8 743 help 744 Define the number of supported memory regions in the library logical 745 memory blocks. 746 The minimal value is CONFIG_NR_DRAM_BANKS. 747 748config LMB_RESERVED_REGIONS 749 int "Number of reserved regions in lmb lib" 750 depends on LMB && !LMB_USE_MAX_REGIONS 751 default 8 752 help 753 Define the number of supported reserved regions in the library logical 754 memory blocks. 755 756endmenu 757 758config PHANDLE_CHECK_SEQ 759 bool "Enable phandle check while getting sequence number" 760 default n 761 help 762 When there are multiple device tree nodes with same name, 763 enable this config option to distinguish them using 764 phandles in fdtdec_get_alias_seq() function. 765