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 REGEX
  40         bool "Enable regular expression support"
  41         default y if NET
  42         help
  43           If this variable is defined, U-Boot is linked against the
  44           SLRE (Super Light Regular Expression) library, which adds
  45           regex support to some commands, for example "env grep" and
  46           "setexpr".
  47
  48 config LIB_RAND
  49         bool "Pseudo-random library support "
  50         help
  51           This library provides pseudo-random number generator functions.
  52
  53 source lib/dhry/Kconfig
  54
  55 source lib/rsa/Kconfig
  56
  57 config TPM
  58         bool "Trusted Platform Module (TPM) Support"
  59         help
  60           This enables support for TPMs which can be used to provide security
  61           features for your board. The TPM can be connected via LPC or I2C
  62           and a sandbox TPM is provided for testing purposes. Use the 'tpm'
  63           command to interactive the TPM. Driver model support is provided
  64           for the low-level TPM interface, but only one TPM is supported at
  65           a time by the TPM library.
  66
  67 menu "Hashing Support"
  68
  69 config SHA1
  70         bool "Enable SHA1 support"
  71         help
  72           This option enables support of hashing using SHA1 algorithm.
  73           The hash is calculated in software.
  74           The SHA1 algorithm produces a 160-bit (20-byte) hash value
  75           (digest).
  76
  77 config SHA256
  78         bool "Enable SHA256 support"
  79         help
  80           This option enables support of hashing using SHA256 algorithm.
  81           The hash is calculated in software.
  82           The SHA256 algorithm produces a 256-bit (32-byte) hash value
  83           (digest).
  84
  85 config SHA_HW_ACCEL
  86         bool "Enable hashing using hardware"
  87         help
  88           This option enables hardware acceleration
  89           for SHA1/SHA256 hashing.
  90           This affects the 'hash' command and also the
  91           hash_lookup_algo() function.
  92
  93 config SHA_PROG_HW_ACCEL
  94         bool "Enable Progressive hashing support using hardware"
  95         depends on SHA_HW_ACCEL
  96         help
  97           This option enables hardware-acceleration for
  98           SHA1/SHA256 progressive hashing.
  99           Data can be streamed in a block at a time and the hashing
 100           is performed in hardware.
 101 endmenu
 102
 103 menu "Compression Support"
 104
 105 config LZ4
 106         bool "Enable LZ4 decompression support"
 107         help
 108           If this option is set, support for LZ4 compressed images
 109           is included. The LZ4 algorithm can run in-place as long as the
 110           compressed image is loaded to the end of the output buffer, and
 111           trades lower compression ratios for much faster decompression.
 112
 113           NOTE: This implements the release version of the LZ4 frame
 114           format as generated by default by the 'lz4' command line tool.
 115           This is not the same as the outdated, less efficient legacy
 116           frame format currently (2015) implemented in the Linux kernel
 117           (generated by 'lz4 -l'). The two formats are incompatible.
 118
 119 endmenu
 120
 121 config ERRNO_STR
 122         bool "Enable function for getting errno-related string message"
 123         help
 124           The function errno_str(int errno), returns a pointer to the errno
 125           corresponding text message:
 126           - if errno is null or positive number - a pointer to "Success" message
 127           - if errno is negative - a pointer to errno related message
 128
 129 source lib/efi/Kconfig
 130
 131 endmenu