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 source lib/dhry/Kconfig
  84
  85 menu "Security support"
  86
  87 config AES
  88         bool "Support the AES algorithm"
  89         help
  90           This provides a means to encrypt and decrypt data using the AES
  91           (Advanced Encryption Standard). This algorithm uses a symetric key
  92           and is widely used as a streaming cipher. Different key lengths are
  93           supported by the algorithm but only a 128-bit key is supported at
  94           present.
  95
  96 source lib/rsa/Kconfig
  97
  98 config TPM
  99         bool "Trusted Platform Module (TPM) Support"
 100         depends on DM
 101         help
 102           This enables support for TPMs which can be used to provide security
 103           features for your board. The TPM can be connected via LPC or I2C
 104           and a sandbox TPM is provided for testing purposes. Use the 'tpm'
 105           command to interactive the TPM. Driver model support is provided
 106           for the low-level TPM interface, but only one TPM is supported at
 107           a time by the TPM library.
 108
 109 endmenu
 110
 111 menu "Hashing Support"
 112
 113 config SHA1
 114         bool "Enable SHA1 support"
 115         help
 116           This option enables support of hashing using SHA1 algorithm.
 117           The hash is calculated in software.
 118           The SHA1 algorithm produces a 160-bit (20-byte) hash value
 119           (digest).
 120
 121 config SHA256
 122         bool "Enable SHA256 support"
 123         help
 124           This option enables support of hashing using SHA256 algorithm.
 125           The hash is calculated in software.
 126           The SHA256 algorithm produces a 256-bit (32-byte) hash value
 127           (digest).
 128
 129 config SHA_HW_ACCEL
 130         bool "Enable hashing using hardware"
 131         help
 132           This option enables hardware acceleration
 133           for SHA1/SHA256 hashing.
 134           This affects the 'hash' command and also the
 135           hash_lookup_algo() function.
 136
 137 config SHA_PROG_HW_ACCEL
 138         bool "Enable Progressive hashing support using hardware"
 139         depends on SHA_HW_ACCEL
 140         help
 141           This option enables hardware-acceleration for
 142           SHA1/SHA256 progressive hashing.
 143           Data can be streamed in a block at a time and the hashing
 144           is performed in hardware.
 145
 146 config MD5
 147         bool
 148
 149 config CRC32C
 150         bool
 151
 152 endmenu
 153
 154 menu "Compression Support"
 155
 156 config LZ4
 157         bool "Enable LZ4 decompression support"
 158         help
 159           If this option is set, support for LZ4 compressed images
 160           is included. The LZ4 algorithm can run in-place as long as the
 161           compressed image is loaded to the end of the output buffer, and
 162           trades lower compression ratios for much faster decompression.
 163
 164           NOTE: This implements the release version of the LZ4 frame
 165           format as generated by default by the 'lz4' command line tool.
 166           This is not the same as the outdated, less efficient legacy
 167           frame format currently (2015) implemented in the Linux kernel
 168           (generated by 'lz4 -l'). The two formats are incompatible.
 169
 170 config LZMA
 171         bool "Enable LZMA decompression support"
 172         help
 173           This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
 174           a dictionary compression algorithm that provides a high compression
 175           ratio and fairly fast decompression speed. See also
 176           CONFIG_CMD_LZMADEC which provides a decode command.
 177
 178 config LZO
 179         bool "Enable LZO decompression support"
 180         help
 181           This enables support for LZO compression algorithm.r
 182
 183 config SPL_LZO
 184         bool "Enable LZO decompression support in SPL"
 185         help
 186           This enables support for LZO compression algorithm in the SPL.
 187
 188 config SPL_GZIP
 189         bool "Enable gzip decompression support for SPL build"
 190         select SPL_ZLIB
 191         help
 192           This enables support for GZIP compression altorithm for SPL boot.
 193
 194 config SPL_ZLIB
 195         bool
 196         help
 197           This enables compression lib for SPL boot.
 198
 199 endmenu
 200
 201 config ERRNO_STR
 202         bool "Enable function for getting errno-related string message"
 203         help
 204           The function errno_str(int errno), returns a pointer to the errno
 205           corresponding text message:
 206           - if errno is null or positive number - a pointer to "Success" message
 207           - if errno is negative - a pointer to errno related message
 208
 209 config OF_LIBFDT
 210         bool "Enable the FDT library"
 211         default y if OF_CONTROL
 212         help
 213           This enables the FDT library (libfdt). It provides functions for
 214           accessing binary device tree images in memory, such as adding and
 215           removing nodes and properties, scanning through the tree and finding
 216           particular compatible nodes. The library operates on a flattened
 217           version of the device tree.
 218
 219 config OF_LIBFDT_OVERLAY
 220         bool "Enable the FDT library overlay support"
 221         help
 222           This enables the FDT library (libfdt) overlay support.
 223
 224 config SPL_OF_LIBFDT
 225         bool "Enable the FDT library for SPL"
 226         default y if SPL_OF_CONTROL
 227         help
 228           This enables the FDT library (libfdt). It provides functions for
 229           accessing binary device tree images in memory, such as adding and
 230           removing nodes and properties, scanning through the tree and finding
 231           particular compatible nodes. The library operates on a flattened
 232           version of the device tree.
 233
 234 config FDT_FIXUP_PARTITIONS
 235         bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
 236         depends on OF_LIBFDT
 237         default n
 238         help
 239           Allow overwriting defined partitions in the device tree blob
 240           using partition info defined in the 'mtdparts' environment
 241           variable.
 242
 243 menu "System tables"
 244         depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
 245
 246 config GENERATE_SMBIOS_TABLE
 247         bool "Generate an SMBIOS (System Management BIOS) table"
 248         default y
 249         depends on X86 || EFI_LOADER
 250         help
 251           The System Management BIOS (SMBIOS) specification addresses how
 252           motherboard and system vendors present management information about
 253           their products in a standard format by extending the BIOS interface
 254           on Intel architecture systems.
 255
 256           Check http://www.dmtf.org/standards/smbios for details.
 257
 258 config SMBIOS_MANUFACTURER
 259         string "SMBIOS Manufacturer"
 260         depends on GENERATE_SMBIOS_TABLE
 261         default SYS_VENDOR
 262         help
 263           The board manufacturer to store in SMBIOS structures.
 264           Change this to override the default one (CONFIG_SYS_VENDOR).
 265
 266 config SMBIOS_PRODUCT_NAME
 267         string "SMBIOS Product Name"
 268         depends on GENERATE_SMBIOS_TABLE
 269         default SYS_BOARD
 270         help
 271           The product name to store in SMBIOS structures.
 272           Change this to override the default one (CONFIG_SYS_BOARD).
 273
 274 endmenu
 275
 276 source lib/efi/Kconfig
 277 source lib/efi_loader/Kconfig
 278
 279 endmenu