lib/Kconfig

   1 menu "Library routines"
   2
   3 config CC_OPTIMIZE_LIBS_FOR_SPEED
   4         bool "Optimize libraries for speed"
   5         help
   6           Enabling this option will pass "-O2" to gcc when compiling
   7           under "lib" directory.
   8
   9           If unsure, say N.
  10
  11 config HAVE_PRIVATE_LIBGCC
  12         bool
  13
  14 config USE_PRIVATE_LIBGCC
  15         bool "Use private libgcc"
  16         depends on HAVE_PRIVATE_LIBGCC
  17         default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
  18         help
  19           This option allows you to use the built-in libgcc implementation
  20           of U-Boot instead of the one provided by the compiler.
  21           If unsure, say N.
  22
  23 config SYS_HZ
  24         int
  25         default 1000
  26         help
  27           The frequency of the timer returned by get_timer().
  28           get_timer() must operate in milliseconds and this option must be
  29           set to 1000.
  30
  31 config USE_TINY_PRINTF
  32         bool "Enable tiny printf() version"
  33         help
  34           This option enables a tiny, stripped down printf version.
  35           This should only be used in space limited environments,
  36           like SPL versions with hard memory limits. This version
  37           reduces the code size by about 2.5KiB on armv7.
  38
  39           The supported format specifiers are %c, %s, %u/%d and %x.
  40
  41 config REGEX
  42         bool "Enable regular expression support"
  43         default y if NET
  44         help
  45           If this variable is defined, U-Boot is linked against the
  46           SLRE (Super Light Regular Expression) library, which adds
  47           regex support to some commands, for example "env grep" and
  48           "setexpr".
  49
  50 config LIB_RAND
  51         bool "Pseudo-random library support "
  52         help
  53           This library provides pseudo-random number generator functions.
  54
  55 config SPL_TINY_MEMSET
  56         bool "Use a very small memset() in SPL"
  57         help
  58           The faster memset() is the arch-specific one (if available) enabled
  59           by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
  60           better performance by writing a word at a time. But in very
  61           size-constrained envrionments even this may be too big. Enable this
  62           option to reduce code size slightly at the cost of some speed.
  63
  64 config RBTREE
  65         bool
  66
  67 source lib/dhry/Kconfig
  68
  69 menu "Security support"
  70
  71 config AES
  72         bool "Support the AES algorithm"
  73         help
  74           This provides a means to encrypt and decrypt data using the AES
  75           (Advanced Encryption Standard). This algorithm uses a symetric key
  76           and is widely used as a streaming cipher. Different key lengths are
  77           supported by the algorithm but only a 128-bit key is supported at
  78           present.
  79
  80 source lib/rsa/Kconfig
  81
  82 config TPM
  83         bool "Trusted Platform Module (TPM) Support"
  84         depends on DM
  85         help
  86           This enables support for TPMs which can be used to provide security
  87           features for your board. The TPM can be connected via LPC or I2C
  88           and a sandbox TPM is provided for testing purposes. Use the 'tpm'
  89           command to interactive the TPM. Driver model support is provided
  90           for the low-level TPM interface, but only one TPM is supported at
  91           a time by the TPM library.
  92
  93 endmenu
  94
  95 menu "Hashing Support"
  96
  97 config SHA1
  98         bool "Enable SHA1 support"
  99         help
 100           This option enables support of hashing using SHA1 algorithm.
 101           The hash is calculated in software.
 102           The SHA1 algorithm produces a 160-bit (20-byte) hash value
 103           (digest).
 104
 105 config SHA256
 106         bool "Enable SHA256 support"
 107         help
 108           This option enables support of hashing using SHA256 algorithm.
 109           The hash is calculated in software.
 110           The SHA256 algorithm produces a 256-bit (32-byte) hash value
 111           (digest).
 112
 113 config SHA_HW_ACCEL
 114         bool "Enable hashing using hardware"
 115         help
 116           This option enables hardware acceleration
 117           for SHA1/SHA256 hashing.
 118           This affects the 'hash' command and also the
 119           hash_lookup_algo() function.
 120
 121 config SHA_PROG_HW_ACCEL
 122         bool "Enable Progressive hashing support using hardware"
 123         depends on SHA_HW_ACCEL
 124         help
 125           This option enables hardware-acceleration for
 126           SHA1/SHA256 progressive hashing.
 127           Data can be streamed in a block at a time and the hashing
 128           is performed in hardware.
 129
 130 config MD5
 131         bool
 132
 133 endmenu
 134
 135 menu "Compression Support"
 136
 137 config LZ4
 138         bool "Enable LZ4 decompression support"
 139         help
 140           If this option is set, support for LZ4 compressed images
 141           is included. The LZ4 algorithm can run in-place as long as the
 142           compressed image is loaded to the end of the output buffer, and
 143           trades lower compression ratios for much faster decompression.
 144
 145           NOTE: This implements the release version of the LZ4 frame
 146           format as generated by default by the 'lz4' command line tool.
 147           This is not the same as the outdated, less efficient legacy
 148           frame format currently (2015) implemented in the Linux kernel
 149           (generated by 'lz4 -l'). The two formats are incompatible.
 150
 151 config LZMA
 152         bool "Enable LZMA decompression support"
 153         help
 154           This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
 155           a dictionary compression algorithm that provides a high compression
 156           ratio and fairly fast decompression speed. See also
 157           CONFIG_CMD_LZMADEC which provides a decode command.
 158
 159 config LZO
 160         bool "Enable LZO decompression support"
 161         help
 162           This enables support for LZO compression algorithm.r
 163 endmenu
 164
 165 config ERRNO_STR
 166         bool "Enable function for getting errno-related string message"
 167         help
 168           The function errno_str(int errno), returns a pointer to the errno
 169           corresponding text message:
 170           - if errno is null or positive number - a pointer to "Success" message
 171           - if errno is negative - a pointer to errno related message
 172
 173 config OF_LIBFDT
 174         bool "Enable the FDT library"
 175         default y if OF_CONTROL
 176         help
 177           This enables the FDT library (libfdt). It provides functions for
 178           accessing binary device tree images in memory, such as adding and
 179           removing notes and properties, scanning through the tree and finding
 180           particular compatible nodes. The library operates on a flattened
 181           version of the device tree.
 182
 183 config OF_LIBFDT_OVERLAY
 184         bool "Enable the FDT library overlay support"
 185         help
 186           This enables the FDT library (libfdt) overlay support.
 187
 188 config SPL_OF_LIBFDT
 189         bool "Enable the FDT library for SPL"
 190         default y if SPL_OF_CONTROL
 191         help
 192           This enables the FDT library (libfdt). It provides functions for
 193           accessing binary device tree images in memory, such as adding and
 194           removing notes and properties, scanning through the tree and finding
 195           particular compatible nodes. The library operates on a flattened
 196           version of the device tree.
 197
 198 config FDT_FIXUP_PARTITIONS
 199         bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
 200         depends on OF_LIBFDT
 201         default n
 202         help
 203           Allow overwriting defined partitions in the device tree blob
 204           using partition info defined in the 'mtdparts' environment
 205           variable.
 206
 207 menu "System tables"
 208         depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
 209
 210 config GENERATE_SMBIOS_TABLE
 211         bool "Generate an SMBIOS (System Management BIOS) table"
 212         default y
 213         depends on X86 || EFI_LOADER
 214         help
 215           The System Management BIOS (SMBIOS) specification addresses how
 216           motherboard and system vendors present management information about
 217           their products in a standard format by extending the BIOS interface
 218           on Intel architecture systems.
 219
 220           Check http://www.dmtf.org/standards/smbios for details.
 221
 222 config SMBIOS_MANUFACTURER
 223         string "SMBIOS Manufacturer"
 224         depends on GENERATE_SMBIOS_TABLE
 225         default SYS_VENDOR
 226         help
 227           The board manufacturer to store in SMBIOS structures.
 228           Change this to override the default one (CONFIG_SYS_VENDOR).
 229
 230 config SMBIOS_PRODUCT_NAME
 231         string "SMBIOS Product Name"
 232         depends on GENERATE_SMBIOS_TABLE
 233         default SYS_BOARD
 234         help
 235           The product name to store in SMBIOS structures.
 236           Change this to override the default one (CONFIG_SYS_BOARD).
 237
 238 endmenu
 239
 240 source lib/efi/Kconfig
 241 source lib/efi_loader/Kconfig
 242
 243 endmenu