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 SYS_VSNPRINTF
  31         bool "Enable safe version of sprintf()"
  32         help
  33           Since sprintf() can overflow its buffer, it is common to use
  34           snprintf() instead, which knows the buffer size and can avoid
  35           overflow. However, this does increase code size slightly (for
  36           Thumb-2, about 420 bytes). Enable this option for safety when
  37           using sprintf() with data you do not control.
  38
  39 config USE_TINY_PRINTF
  40         bool "Enable tiny printf() version"
  41         help
  42           This option enables a tiny, stripped down printf version.
  43           This should only be used in space limited environments,
  44           like SPL versions with hard memory limits. This version
  45           reduces the code size by about 2.5KiB on armv7.
  46
  47           The supported format specifiers are %c, %s, %u/%d and %x.
  48
  49 config REGEX
  50         bool "Enable regular expression support"
  51         default y if NET
  52         help
  53           If this variable is defined, U-Boot is linked against the
  54           SLRE (Super Light Regular Expression) library, which adds
  55           regex support to some commands, for example "env grep" and
  56           "setexpr".
  57
  58 config LIB_RAND
  59         bool "Pseudo-random library support "
  60         help
  61           This library provides pseudo-random number generator functions.
  62
  63 source lib/dhry/Kconfig
  64
  65 source lib/rsa/Kconfig
  66
  67 config TPM
  68         bool "Trusted Platform Module (TPM) Support"
  69         depends on DM
  70         help
  71           This enables support for TPMs which can be used to provide security
  72           features for your board. The TPM can be connected via LPC or I2C
  73           and a sandbox TPM is provided for testing purposes. Use the 'tpm'
  74           command to interactive the TPM. Driver model support is provided
  75           for the low-level TPM interface, but only one TPM is supported at
  76           a time by the TPM library.
  77
  78 menu "Hashing Support"
  79
  80 config SHA1
  81         bool "Enable SHA1 support"
  82         help
  83           This option enables support of hashing using SHA1 algorithm.
  84           The hash is calculated in software.
  85           The SHA1 algorithm produces a 160-bit (20-byte) hash value
  86           (digest).
  87
  88 config SHA256
  89         bool "Enable SHA256 support"
  90         help
  91           This option enables support of hashing using SHA256 algorithm.
  92           The hash is calculated in software.
  93           The SHA256 algorithm produces a 256-bit (32-byte) hash value
  94           (digest).
  95
  96 config SHA_HW_ACCEL
  97         bool "Enable hashing using hardware"
  98         help
  99           This option enables hardware acceleration
 100           for SHA1/SHA256 hashing.
 101           This affects the 'hash' command and also the
 102           hash_lookup_algo() function.
 103
 104 config SHA_PROG_HW_ACCEL
 105         bool "Enable Progressive hashing support using hardware"
 106         depends on SHA_HW_ACCEL
 107         help
 108           This option enables hardware-acceleration for
 109           SHA1/SHA256 progressive hashing.
 110           Data can be streamed in a block at a time and the hashing
 111           is performed in hardware.
 112 endmenu
 113
 114 menu "Compression Support"
 115
 116 config LZ4
 117         bool "Enable LZ4 decompression support"
 118         help
 119           If this option is set, support for LZ4 compressed images
 120           is included. The LZ4 algorithm can run in-place as long as the
 121           compressed image is loaded to the end of the output buffer, and
 122           trades lower compression ratios for much faster decompression.
 123
 124           NOTE: This implements the release version of the LZ4 frame
 125           format as generated by default by the 'lz4' command line tool.
 126           This is not the same as the outdated, less efficient legacy
 127           frame format currently (2015) implemented in the Linux kernel
 128           (generated by 'lz4 -l'). The two formats are incompatible.
 129
 130 endmenu
 131
 132 config ERRNO_STR
 133         bool "Enable function for getting errno-related string message"
 134         help
 135           The function errno_str(int errno), returns a pointer to the errno
 136           corresponding text message:
 137           - if errno is null or positive number - a pointer to "Success" message
 138           - if errno is negative - a pointer to errno related message
 139
 140 source lib/efi/Kconfig
 141
 142 endmenu