lib/Kconfig

   1 menu "Library routines"
   2
   3 config BCH
   4         bool "Enable Software based BCH ECC"
   5         help
   6           Enables software based BCH ECC algorithm present in lib/bch.c
   7           This is used by SoC platforms which do not have built-in ELM
   8           hardware engine required for BCH ECC correction.
   9
  10 config CC_OPTIMIZE_LIBS_FOR_SPEED
  11         bool "Optimize libraries for speed"
  12         help
  13           Enabling this option will pass "-O2" to gcc when compiling
  14           under "lib" directory.
  15
  16           If unsure, say N.
  17
  18 config DYNAMIC_CRC_TABLE
  19         bool "Enable Dynamic tables for CRC"
  20         help
  21           Enable this option to calculate entries for CRC tables at runtime.
  22           This can be helpful when reducing the size of the build image
  23
  24 config HAVE_ARCH_IOMAP
  25         bool
  26         help
  27           Enable this option if architecture provides io{read,write}{8,16,32}
  28           I/O accessor functions.
  29
  30 config HAVE_PRIVATE_LIBGCC
  31         bool
  32
  33 config LIB_UUID
  34         bool
  35
  36 config PRINTF
  37         bool
  38         default y
  39
  40 config SPL_PRINTF
  41         bool
  42         select SPL_SPRINTF
  43         select SPL_STRTO if !USE_TINY_PRINTF
  44
  45 config TPL_PRINTF
  46         bool
  47         select TPL_SPRINTF
  48         select TPL_STRTO if !USE_TINY_PRINTF
  49
  50 config SPRINTF
  51         bool
  52         default y
  53
  54 config SPL_SPRINTF
  55         bool
  56
  57 config TPL_SPRINTF
  58         bool
  59
  60 config STRTO
  61         bool
  62         default y
  63
  64 config SPL_STRTO
  65         bool
  66
  67 config TPL_STRTO
  68         bool
  69
  70 config IMAGE_SPARSE
  71         bool
  72
  73 config IMAGE_SPARSE_FILLBUF_SIZE
  74         hex "Android sparse image CHUNK_TYPE_FILL buffer size"
  75         default 0x80000
  76         depends on IMAGE_SPARSE
  77         help
  78           Set the size of the fill buffer used when processing CHUNK_TYPE_FILL
  79           chunks.
  80
  81 config USE_PRIVATE_LIBGCC
  82         bool "Use private libgcc"
  83         depends on HAVE_PRIVATE_LIBGCC
  84         default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
  85         help
  86           This option allows you to use the built-in libgcc implementation
  87           of U-Boot instead of the one provided by the compiler.
  88           If unsure, say N.
  89
  90 config SYS_HZ
  91         int
  92         default 1000
  93         help
  94           The frequency of the timer returned by get_timer().
  95           get_timer() must operate in milliseconds and this option must be
  96           set to 1000.
  97
  98 config USE_TINY_PRINTF
  99         bool "Enable tiny printf() version"
 100         help
 101           This option enables a tiny, stripped down printf version.
 102           This should only be used in space limited environments,
 103           like SPL versions with hard memory limits. This version
 104           reduces the code size by about 2.5KiB on armv7.
 105
 106           The supported format specifiers are %c, %s, %u/%d and %x.
 107
 108 config PANIC_HANG
 109         bool "Do not reset the system on fatal error"
 110         help
 111           Define this option to stop the system in case of a fatal error,
 112           so that you have to reset it manually. This is probably NOT a good
 113           idea for an embedded system where you want the system to reboot
 114           automatically as fast as possible, but it may be useful during
 115           development since you can try to debug the conditions that lead to
 116           the situation.
 117
 118 config REGEX
 119         bool "Enable regular expression support"
 120         default y if NET
 121         help
 122           If this variable is defined, U-Boot is linked against the
 123           SLRE (Super Light Regular Expression) library, which adds
 124           regex support to some commands, for example "env grep" and
 125           "setexpr".
 126
 127 choice
 128         prompt "Pseudo-random library support type"
 129         depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID
 130         default LIB_RAND
 131         help
 132           Select the library to provide pseudo-random number generator
 133           functions.  LIB_HW_RAND supports certain hardware engines that
 134           provide this functionality.  If in doubt, select LIB_RAND.
 135
 136 config LIB_RAND
 137         bool "Pseudo-random library support"
 138
 139 config LIB_HW_RAND
 140         bool "HW Engine for random libray support"
 141
 142 endchoice
 143
 144 config SPL_TINY_MEMSET
 145         bool "Use a very small memset() in SPL"
 146         help
 147           The faster memset() is the arch-specific one (if available) enabled
 148           by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
 149           better performance by writing a word at a time. But in very
 150           size-constrained environments even this may be too big. Enable this
 151           option to reduce code size slightly at the cost of some speed.
 152
 153 config TPL_TINY_MEMSET
 154         bool "Use a very small memset() in TPL"
 155         help
 156           The faster memset() is the arch-specific one (if available) enabled
 157           by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
 158           better performance by writing a word at a time. But in very
 159           size-constrained environments even this may be too big. Enable this
 160           option to reduce code size slightly at the cost of some speed.
 161
 162 config RBTREE
 163         bool
 164
 165 config BITREVERSE
 166         bool "Bit reverse library from Linux"
 167
 168 config TRACE
 169         bool "Support for tracing of function calls and timing"
 170         imply CMD_TRACE
 171         help
 172           Enables function tracing within U-Boot. This allows recording of call
 173           traces including timing information. The command can write data to
 174           memory for exporting for analysis (e.g. using bootchart).
 175           See doc/README.trace for full details.
 176
 177 config TRACE_BUFFER_SIZE
 178         hex "Size of trace buffer in U-Boot"
 179         depends on TRACE
 180         default 0x01000000
 181         help
 182           Sets the size of the trace buffer in U-Boot. This is allocated from
 183           memory during relocation. If this buffer is too small, the trace
 184           history will be truncated, with later records omitted.
 185
 186           If early trace is enabled (i.e. before relocation), this buffer must
 187           be large enough to include all the data from the early trace buffer as
 188           well, since this is copied over to the main buffer during relocation.
 189
 190           A trace record is emitted for each function call and each record is
 191           12 bytes (see struct trace_call). A suggested minimum size is 1MB. If
 192           the size is too small then 'trace stats' will show a message saying
 193           how many records were dropped due to buffer overflow.
 194
 195 config TRACE_EARLY
 196         bool "Enable tracing before relocation"
 197         depends on TRACE
 198         help
 199           Sometimes it is helpful to trace execution of U-Boot before
 200           relocation. This is possible by using a arch-specific, fixed buffer
 201           position in memory. Enable this option to start tracing as early as
 202           possible after U-Boot starts.
 203
 204 config TRACE_EARLY_SIZE
 205         hex "Size of early trace buffer in U-Boot"
 206         depends on TRACE_EARLY
 207         default 0x00100000
 208         help
 209           Sets the size of the early trace buffer in bytes. This is used to hold
 210           tracing information before relocation.
 211
 212 config TRACE_EARLY_ADDR
 213         hex "Address of early trace buffer in U-Boot"
 214         depends on TRACE_EARLY
 215         default 0x00100000
 216         help
 217           Sets the address of the early trace buffer in U-Boot. This memory
 218           must be accessible before relocation.
 219
 220           A trace record is emitted for each function call and each record is
 221           12 bytes (see struct trace_call). A suggested minimum size is 1MB. If
 222           the size is too small then the message which says the amount of early
 223           data being coped will the the same as the
 224
 225 source lib/dhry/Kconfig
 226
 227 menu "Security support"
 228
 229 config AES
 230         bool "Support the AES algorithm"
 231         help
 232           This provides a means to encrypt and decrypt data using the AES
 233           (Advanced Encryption Standard). This algorithm uses a symetric key
 234           and is widely used as a streaming cipher. Different key lengths are
 235           supported by the algorithm but only a 128-bit key is supported at
 236           present.
 237
 238 source lib/rsa/Kconfig
 239
 240 config TPM
 241         bool "Trusted Platform Module (TPM) Support"
 242         depends on DM
 243         help
 244           This enables support for TPMs which can be used to provide security
 245           features for your board. The TPM can be connected via LPC or I2C
 246           and a sandbox TPM is provided for testing purposes. Use the 'tpm'
 247           command to interactive the TPM. Driver model support is provided
 248           for the low-level TPM interface, but only one TPM is supported at
 249           a time by the TPM library.
 250
 251 config SPL_TPM
 252         bool "Trusted Platform Module (TPM) Support in SPL"
 253         depends on SPL_DM
 254         help
 255           This enables support for TPMs which can be used to provide security
 256           features for your board. The TPM can be connected via LPC or I2C
 257           and a sandbox TPM is provided for testing purposes. Use the 'tpm'
 258           command to interactive the TPM. Driver model support is provided
 259           for the low-level TPM interface, but only one TPM is supported at
 260           a time by the TPM library.
 261
 262 config TPL_TPM
 263         bool "Trusted Platform Module (TPM) Support in TPL"
 264         depends on TPL_DM
 265         help
 266           This enables support for TPMs which can be used to provide security
 267           features for your board. The TPM can be connected via LPC or I2C
 268           and a sandbox TPM is provided for testing purposes. Use the 'tpm'
 269           command to interactive the TPM. Driver model support is provided
 270           for the low-level TPM interface, but only one TPM is supported at
 271           a time by the TPM library.
 272
 273 endmenu
 274
 275 menu "Android Verified Boot"
 276
 277 config LIBAVB
 278         bool "Android Verified Boot 2.0 support"
 279         depends on ANDROID_BOOT_IMAGE
 280         default n
 281         help
 282           This enables support of Android Verified Boot 2.0 which can be used
 283           to assure the end user of the integrity of the software running on a
 284           device. Introduces such features as boot chain of trust, rollback
 285           protection etc.
 286
 287 endmenu
 288
 289 menu "Hashing Support"
 290
 291 config SHA1
 292         bool "Enable SHA1 support"
 293         help
 294           This option enables support of hashing using SHA1 algorithm.
 295           The hash is calculated in software.
 296           The SHA1 algorithm produces a 160-bit (20-byte) hash value
 297           (digest).
 298
 299 config SHA256
 300         bool "Enable SHA256 support"
 301         help
 302           This option enables support of hashing using SHA256 algorithm.
 303           The hash is calculated in software.
 304           The SHA256 algorithm produces a 256-bit (32-byte) hash value
 305           (digest).
 306
 307 config SHA_HW_ACCEL
 308         bool "Enable hashing using hardware"
 309         help
 310           This option enables hardware acceleration
 311           for SHA1/SHA256 hashing.
 312           This affects the 'hash' command and also the
 313           hash_lookup_algo() function.
 314
 315 config SHA_PROG_HW_ACCEL
 316         bool "Enable Progressive hashing support using hardware"
 317         depends on SHA_HW_ACCEL
 318         help
 319           This option enables hardware-acceleration for
 320           SHA1/SHA256 progressive hashing.
 321           Data can be streamed in a block at a time and the hashing
 322           is performed in hardware.
 323
 324 config MD5
 325         bool
 326
 327 config CRC32C
 328         bool
 329
 330 config XXHASH
 331         bool
 332
 333 endmenu
 334
 335 menu "Compression Support"
 336
 337 config LZ4
 338         bool "Enable LZ4 decompression support"
 339         help
 340           If this option is set, support for LZ4 compressed images
 341           is included. The LZ4 algorithm can run in-place as long as the
 342           compressed image is loaded to the end of the output buffer, and
 343           trades lower compression ratios for much faster decompression.
 344
 345           NOTE: This implements the release version of the LZ4 frame
 346           format as generated by default by the 'lz4' command line tool.
 347           This is not the same as the outdated, less efficient legacy
 348           frame format currently (2015) implemented in the Linux kernel
 349           (generated by 'lz4 -l'). The two formats are incompatible.
 350
 351 config LZMA
 352         bool "Enable LZMA decompression support"
 353         help
 354           This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
 355           a dictionary compression algorithm that provides a high compression
 356           ratio and fairly fast decompression speed. See also
 357           CONFIG_CMD_LZMADEC which provides a decode command.
 358
 359 config LZO
 360         bool "Enable LZO decompression support"
 361         help
 362           This enables support for LZO compression algorithm.r
 363
 364 config GZIP
 365         bool "Enable gzip decompression support"
 366         select ZLIB
 367         default y
 368         help
 369           This enables support for GZIP compression algorithm.
 370
 371 config ZLIB
 372         bool
 373         default y
 374         help
 375           This enables ZLIB compression lib.
 376
 377 config ZSTD
 378         bool "Enable Zstandard decompression support"
 379         select XXHASH
 380         help
 381           This enables Zstandard decompression library.
 382
 383 config SPL_LZ4
 384         bool "Enable LZ4 decompression support in SPL"
 385         help
 386           This enables support for tge LZ4 decompression algorithm in SPL. LZ4
 387           is a lossless data compression algorithm that is focused on
 388           fast compression and decompression speed. It belongs to the LZ77
 389           family of byte-oriented compression schemes.
 390
 391 config SPL_LZO
 392         bool "Enable LZO decompression support in SPL"
 393         help
 394           This enables support for LZO compression algorithm in the SPL.
 395
 396 config SPL_GZIP
 397         bool "Enable gzip decompression support for SPL build"
 398         select SPL_ZLIB
 399         help
 400           This enables support for GZIP compression altorithm for SPL boot.
 401
 402 config SPL_ZLIB
 403         bool
 404         help
 405           This enables compression lib for SPL boot.
 406
 407 config SPL_ZSTD
 408         bool "Enable Zstandard decompression support in SPL"
 409         select XXHASH
 410         help
 411           This enables Zstandard decompression library in the SPL.
 412
 413 endmenu
 414
 415 config ERRNO_STR
 416         bool "Enable function for getting errno-related string message"
 417         help
 418           The function errno_str(int errno), returns a pointer to the errno
 419           corresponding text message:
 420           - if errno is null or positive number - a pointer to "Success" message
 421           - if errno is negative - a pointer to errno related message
 422
 423 config HEXDUMP
 424         bool "Enable hexdump"
 425         help
 426           This enables functions for printing dumps of binary data.
 427
 428 config OF_LIBFDT
 429         bool "Enable the FDT library"
 430         default y if OF_CONTROL
 431         help
 432           This enables the FDT library (libfdt). It provides functions for
 433           accessing binary device tree images in memory, such as adding and
 434           removing nodes and properties, scanning through the tree and finding
 435           particular compatible nodes. The library operates on a flattened
 436           version of the device tree.
 437
 438 config OF_LIBFDT_OVERLAY
 439         bool "Enable the FDT library overlay support"
 440         depends on OF_LIBFDT
 441         default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE
 442         help
 443           This enables the FDT library (libfdt) overlay support.
 444
 445 config SPL_OF_LIBFDT
 446         bool "Enable the FDT library for SPL"
 447         default y if SPL_OF_CONTROL
 448         help
 449           This enables the FDT library (libfdt). It provides functions for
 450           accessing binary device tree images in memory, such as adding and
 451           removing nodes and properties, scanning through the tree and finding
 452           particular compatible nodes. The library operates on a flattened
 453           version of the device tree.
 454
 455 config TPL_OF_LIBFDT
 456         bool "Enable the FDT library for TPL"
 457         default y if TPL_OF_CONTROL
 458         help
 459           This enables the FDT library (libfdt). It provides functions for
 460           accessing binary device tree images in memory, such as adding and
 461           removing nodes and properties, scanning through the tree and finding
 462           particular compatible nodes. The library operates on a flattened
 463           version of the device tree.
 464
 465 config FDT_FIXUP_PARTITIONS
 466         bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
 467         depends on OF_LIBFDT
 468         depends on CMD_MTDPARTS
 469         help
 470           Allow overwriting defined partitions in the device tree blob
 471           using partition info defined in the 'mtdparts' environment
 472           variable.
 473
 474 menu "System tables"
 475         depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
 476
 477 config GENERATE_SMBIOS_TABLE
 478         bool "Generate an SMBIOS (System Management BIOS) table"
 479         default y
 480         depends on X86 || EFI_LOADER
 481         help
 482           The System Management BIOS (SMBIOS) specification addresses how
 483           motherboard and system vendors present management information about
 484           their products in a standard format by extending the BIOS interface
 485           on Intel architecture systems.
 486
 487           Check http://www.dmtf.org/standards/smbios for details.
 488
 489 config SMBIOS_MANUFACTURER
 490         string "SMBIOS Manufacturer"
 491         depends on GENERATE_SMBIOS_TABLE
 492         default SYS_VENDOR
 493         help
 494           The board manufacturer to store in SMBIOS structures.
 495           Change this to override the default one (CONFIG_SYS_VENDOR).
 496
 497 config SMBIOS_PRODUCT_NAME
 498         string "SMBIOS Product Name"
 499         depends on GENERATE_SMBIOS_TABLE
 500         default SYS_BOARD
 501         help
 502           The product name to store in SMBIOS structures.
 503           Change this to override the default one (CONFIG_SYS_BOARD).
 504
 505 endmenu
 506
 507 source lib/efi/Kconfig
 508 source lib/efi_loader/Kconfig
 509 source lib/optee/Kconfig
 510
 511 config TEST_FDTDEC
 512         bool "enable fdtdec test"
 513         depends on OF_LIBFDT
 514
 515 endmenu