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_PRIVATE_LIBGCC
  25         bool
  26
  27 config LIB_UUID
  28         bool
  29
  30 config USE_PRIVATE_LIBGCC
  31         bool "Use private libgcc"
  32         depends on HAVE_PRIVATE_LIBGCC
  33         default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
  34         help
  35           This option allows you to use the built-in libgcc implementation
  36           of U-Boot instead of the one provided by the compiler.
  37           If unsure, say N.
  38
  39 config SYS_HZ
  40         int
  41         default 1000
  42         help
  43           The frequency of the timer returned by get_timer().
  44           get_timer() must operate in milliseconds and this option must be
  45           set to 1000.
  46
  47 config USE_TINY_PRINTF
  48         bool "Enable tiny printf() version"
  49         help
  50           This option enables a tiny, stripped down printf version.
  51           This should only be used in space limited environments,
  52           like SPL versions with hard memory limits. This version
  53           reduces the code size by about 2.5KiB on armv7.
  54
  55           The supported format specifiers are %c, %s, %u/%d and %x.
  56
  57 config PANIC_HANG
  58         bool "Do not reset the system on fatal error"
  59         help
  60           Define this option to stop the system in case of a fatal error,
  61           so that you have to reset it manually. This is probably NOT a good
  62           idea for an embedded system where you want the system to reboot
  63           automatically as fast as possible, but it may be useful during
  64           development since you can try to debug the conditions that lead to
  65           the situation.
  66
  67 config REGEX
  68         bool "Enable regular expression support"
  69         default n if ARCH_SUNXI
  70         default y if NET
  71         help
  72           If this variable is defined, U-Boot is linked against the
  73           SLRE (Super Light Regular Expression) library, which adds
  74           regex support to some commands, for example "env grep" and
  75           "setexpr".
  76
  77 choice
  78         prompt "Pseudo-random library support type"
  79         depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID
  80         default LIB_RAND
  81         help
  82           Select the library to provide pseudo-random number generator
  83           functions.  LIB_HW_RAND supports certain hardware engines that
  84           provide this functionality.  If in doubt, select LIB_RAND.
  85
  86 config LIB_RAND
  87         bool "Pseudo-random library support"
  88
  89 config LIB_HW_RAND
  90         bool "HW Engine for random libray support"
  91
  92 endchoice
  93
  94 config SPL_TINY_MEMSET
  95         bool "Use a very small memset() in SPL"
  96         help
  97           The faster memset() is the arch-specific one (if available) enabled
  98           by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
  99           better performance by writing a word at a time. But in very
 100           size-constrained envrionments even this may be too big. Enable this
 101           option to reduce code size slightly at the cost of some speed.
 102
 103 config TPL_TINY_MEMSET
 104         bool "Use a very small memset() in TPL"
 105         help
 106           The faster memset() is the arch-specific one (if available) enabled
 107           by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
 108           better performance by writing a word at a time. But in very
 109           size-constrained envrionments even this may be too big. Enable this
 110           option to reduce code size slightly at the cost of some speed.
 111
 112 config RBTREE
 113         bool
 114
 115 config BITREVERSE
 116         bool "Bit reverse library from Linux"
 117
 118 source lib/dhry/Kconfig
 119
 120 menu "Security support"
 121
 122 config AES
 123         bool "Support the AES algorithm"
 124         help
 125           This provides a means to encrypt and decrypt data using the AES
 126           (Advanced Encryption Standard). This algorithm uses a symetric key
 127           and is widely used as a streaming cipher. Different key lengths are
 128           supported by the algorithm but only a 128-bit key is supported at
 129           present.
 130
 131 source lib/rsa/Kconfig
 132
 133 config TPM
 134         bool "Trusted Platform Module (TPM) Support"
 135         depends on DM
 136         help
 137           This enables support for TPMs which can be used to provide security
 138           features for your board. The TPM can be connected via LPC or I2C
 139           and a sandbox TPM is provided for testing purposes. Use the 'tpm'
 140           command to interactive the TPM. Driver model support is provided
 141           for the low-level TPM interface, but only one TPM is supported at
 142           a time by the TPM library.
 143
 144 endmenu
 145
 146 menu "Hashing Support"
 147
 148 config SHA1
 149         bool "Enable SHA1 support"
 150         help
 151           This option enables support of hashing using SHA1 algorithm.
 152           The hash is calculated in software.
 153           The SHA1 algorithm produces a 160-bit (20-byte) hash value
 154           (digest).
 155
 156 config SHA256
 157         bool "Enable SHA256 support"
 158         help
 159           This option enables support of hashing using SHA256 algorithm.
 160           The hash is calculated in software.
 161           The SHA256 algorithm produces a 256-bit (32-byte) hash value
 162           (digest).
 163
 164 config SHA_HW_ACCEL
 165         bool "Enable hashing using hardware"
 166         help
 167           This option enables hardware acceleration
 168           for SHA1/SHA256 hashing.
 169           This affects the 'hash' command and also the
 170           hash_lookup_algo() function.
 171
 172 config SHA_PROG_HW_ACCEL
 173         bool "Enable Progressive hashing support using hardware"
 174         depends on SHA_HW_ACCEL
 175         help
 176           This option enables hardware-acceleration for
 177           SHA1/SHA256 progressive hashing.
 178           Data can be streamed in a block at a time and the hashing
 179           is performed in hardware.
 180
 181 config MD5
 182         bool
 183
 184 config CRC32C
 185         bool
 186
 187 endmenu
 188
 189 menu "Compression Support"
 190
 191 config LZ4
 192         bool "Enable LZ4 decompression support"
 193         help
 194           If this option is set, support for LZ4 compressed images
 195           is included. The LZ4 algorithm can run in-place as long as the
 196           compressed image is loaded to the end of the output buffer, and
 197           trades lower compression ratios for much faster decompression.
 198
 199           NOTE: This implements the release version of the LZ4 frame
 200           format as generated by default by the 'lz4' command line tool.
 201           This is not the same as the outdated, less efficient legacy
 202           frame format currently (2015) implemented in the Linux kernel
 203           (generated by 'lz4 -l'). The two formats are incompatible.
 204
 205 config LZMA
 206         bool "Enable LZMA decompression support"
 207         help
 208           This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
 209           a dictionary compression algorithm that provides a high compression
 210           ratio and fairly fast decompression speed. See also
 211           CONFIG_CMD_LZMADEC which provides a decode command.
 212
 213 config LZO
 214         bool "Enable LZO decompression support"
 215         help
 216           This enables support for LZO compression algorithm.r
 217
 218 config SPL_LZO
 219         bool "Enable LZO decompression support in SPL"
 220         help
 221           This enables support for LZO compression algorithm in the SPL.
 222
 223 config SPL_GZIP
 224         bool "Enable gzip decompression support for SPL build"
 225         select SPL_ZLIB
 226         help
 227           This enables support for GZIP compression altorithm for SPL boot.
 228
 229 config SPL_ZLIB
 230         bool
 231         help
 232           This enables compression lib for SPL boot.
 233
 234 endmenu
 235
 236 config ERRNO_STR
 237         bool "Enable function for getting errno-related string message"
 238         help
 239           The function errno_str(int errno), returns a pointer to the errno
 240           corresponding text message:
 241           - if errno is null or positive number - a pointer to "Success" message
 242           - if errno is negative - a pointer to errno related message
 243
 244 config OF_LIBFDT
 245         bool "Enable the FDT library"
 246         default y if OF_CONTROL
 247         help
 248           This enables the FDT library (libfdt). It provides functions for
 249           accessing binary device tree images in memory, such as adding and
 250           removing nodes and properties, scanning through the tree and finding
 251           particular compatible nodes. The library operates on a flattened
 252           version of the device tree.
 253
 254 config OF_LIBFDT_OVERLAY
 255         bool "Enable the FDT library overlay support"
 256         help
 257           This enables the FDT library (libfdt) overlay support.
 258
 259 config SPL_OF_LIBFDT
 260         bool "Enable the FDT library for SPL"
 261         default y if SPL_OF_CONTROL
 262         help
 263           This enables the FDT library (libfdt). It provides functions for
 264           accessing binary device tree images in memory, such as adding and
 265           removing nodes and properties, scanning through the tree and finding
 266           particular compatible nodes. The library operates on a flattened
 267           version of the device tree.
 268
 269 config FDT_FIXUP_PARTITIONS
 270         bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
 271         depends on OF_LIBFDT
 272         default n
 273         help
 274           Allow overwriting defined partitions in the device tree blob
 275           using partition info defined in the 'mtdparts' environment
 276           variable.
 277
 278 menu "System tables"
 279         depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
 280
 281 config GENERATE_SMBIOS_TABLE
 282         bool "Generate an SMBIOS (System Management BIOS) table"
 283         default y
 284         depends on X86 || EFI_LOADER
 285         help
 286           The System Management BIOS (SMBIOS) specification addresses how
 287           motherboard and system vendors present management information about
 288           their products in a standard format by extending the BIOS interface
 289           on Intel architecture systems.
 290
 291           Check http://www.dmtf.org/standards/smbios for details.
 292
 293 config SMBIOS_MANUFACTURER
 294         string "SMBIOS Manufacturer"
 295         depends on GENERATE_SMBIOS_TABLE
 296         default SYS_VENDOR
 297         help
 298           The board manufacturer to store in SMBIOS structures.
 299           Change this to override the default one (CONFIG_SYS_VENDOR).
 300
 301 config SMBIOS_PRODUCT_NAME
 302         string "SMBIOS Product Name"
 303         depends on GENERATE_SMBIOS_TABLE
 304         default SYS_BOARD
 305         help
 306           The product name to store in SMBIOS structures.
 307           Change this to override the default one (CONFIG_SYS_BOARD).
 308
 309 endmenu
 310
 311 source lib/efi/Kconfig
 312 source lib/efi_loader/Kconfig
 313
 314 endmenu