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