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