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         help
  18           This option allows you to use the built-in libgcc implementation
  19           of U-Boot instead of the one privided by the compiler.
  20           If unsure, say N.
  21
  22 config SYS_HZ
  23         int
  24         default 1000
  25         help
  26           The frequency of the timer returned by get_timer().
  27           get_timer() must operate in milliseconds and this option must be
  28           set to 1000.
  29
  30 config USE_TINY_PRINTF
  31         bool "Enable tiny printf() version"
  32         help
  33           This option enables a tiny, stripped down printf version.
  34           This should only be used in space limited environments,
  35           like SPL versions with hard memory limits. This version
  36           reduces the code size by about 2.5KiB on armv7.
  37
  38           The supported format specifiers are %c, %s, %u/%d and %x.
  39
  40 config REGEX
  41         bool "Enable regular expression support"
  42         default y if NET
  43         help
  44           If this variable is defined, U-Boot is linked against the
  45           SLRE (Super Light Regular Expression) library, which adds
  46           regex support to some commands, for example "env grep" and
  47           "setexpr".
  48
  49 config LIB_RAND
  50         bool "Pseudo-random library support "
  51         help
  52           This library provides pseudo-random number generator functions.
  53
  54 source lib/dhry/Kconfig
  55
  56 source lib/rsa/Kconfig
  57
  58 config TPM
  59         bool "Trusted Platform Module (TPM) Support"
  60         depends on DM
  61         help
  62           This enables support for TPMs which can be used to provide security
  63           features for your board. The TPM can be connected via LPC or I2C
  64           and a sandbox TPM is provided for testing purposes. Use the 'tpm'
  65           command to interactive the TPM. Driver model support is provided
  66           for the low-level TPM interface, but only one TPM is supported at
  67           a time by the TPM library.
  68
  69 menu "Hashing Support"
  70
  71 config SHA1
  72         bool "Enable SHA1 support"
  73         help
  74           This option enables support of hashing using SHA1 algorithm.
  75           The hash is calculated in software.
  76           The SHA1 algorithm produces a 160-bit (20-byte) hash value
  77           (digest).
  78
  79 config SHA256
  80         bool "Enable SHA256 support"
  81         help
  82           This option enables support of hashing using SHA256 algorithm.
  83           The hash is calculated in software.
  84           The SHA256 algorithm produces a 256-bit (32-byte) hash value
  85           (digest).
  86
  87 config SHA_HW_ACCEL
  88         bool "Enable hashing using hardware"
  89         help
  90           This option enables hardware acceleration
  91           for SHA1/SHA256 hashing.
  92           This affects the 'hash' command and also the
  93           hash_lookup_algo() function.
  94
  95 config SHA_PROG_HW_ACCEL
  96         bool "Enable Progressive hashing support using hardware"
  97         depends on SHA_HW_ACCEL
  98         help
  99           This option enables hardware-acceleration for
 100           SHA1/SHA256 progressive hashing.
 101           Data can be streamed in a block at a time and the hashing
 102           is performed in hardware.
 103 endmenu
 104
 105 menu "Compression Support"
 106
 107 config LZ4
 108         bool "Enable LZ4 decompression support"
 109         help
 110           If this option is set, support for LZ4 compressed images
 111           is included. The LZ4 algorithm can run in-place as long as the
 112           compressed image is loaded to the end of the output buffer, and
 113           trades lower compression ratios for much faster decompression.
 114
 115           NOTE: This implements the release version of the LZ4 frame
 116           format as generated by default by the 'lz4' command line tool.
 117           This is not the same as the outdated, less efficient legacy
 118           frame format currently (2015) implemented in the Linux kernel
 119           (generated by 'lz4 -l'). The two formats are incompatible.
 120
 121 endmenu
 122
 123 config ERRNO_STR
 124         bool "Enable function for getting errno-related string message"
 125         help
 126           The function errno_str(int errno), returns a pointer to the errno
 127           corresponding text message:
 128           - if errno is null or positive number - a pointer to "Success" message
 129           - if errno is negative - a pointer to errno related message
 130
 131 config OF_LIBFDT
 132         bool "Enable the FDT library"
 133         default y if OF_CONTROL
 134         help
 135           This enables the FDT library (libfdt). It provides functions for
 136           accessing binary device tree images in memory, such as adding and
 137           removing notes and properties, scanning through the tree and finding
 138           particular compatible nodes. The library operates on a flattened
 139           version of the device tree.
 140
 141 source lib/efi/Kconfig
 142
 143 endmenu