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