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 source lib/dhry/Kconfig
  56
  57 source lib/rsa/Kconfig
  58
  59 config TPM
  60         bool "Trusted Platform Module (TPM) Support"
  61         depends on DM
  62         help
  63           This enables support for TPMs which can be used to provide security
  64           features for your board. The TPM can be connected via LPC or I2C
  65           and a sandbox TPM is provided for testing purposes. Use the 'tpm'
  66           command to interactive the TPM. Driver model support is provided
  67           for the low-level TPM interface, but only one TPM is supported at
  68           a time by the TPM library.
  69
  70 menu "Hashing Support"
  71
  72 config SHA1
  73         bool "Enable SHA1 support"
  74         help
  75           This option enables support of hashing using SHA1 algorithm.
  76           The hash is calculated in software.
  77           The SHA1 algorithm produces a 160-bit (20-byte) hash value
  78           (digest).
  79
  80 config SHA256
  81         bool "Enable SHA256 support"
  82         help
  83           This option enables support of hashing using SHA256 algorithm.
  84           The hash is calculated in software.
  85           The SHA256 algorithm produces a 256-bit (32-byte) hash value
  86           (digest).
  87
  88 config SHA_HW_ACCEL
  89         bool "Enable hashing using hardware"
  90         help
  91           This option enables hardware acceleration
  92           for SHA1/SHA256 hashing.
  93           This affects the 'hash' command and also the
  94           hash_lookup_algo() function.
  95
  96 config SHA_PROG_HW_ACCEL
  97         bool "Enable Progressive hashing support using hardware"
  98         depends on SHA_HW_ACCEL
  99         help
 100           This option enables hardware-acceleration for
 101           SHA1/SHA256 progressive hashing.
 102           Data can be streamed in a block at a time and the hashing
 103           is performed in hardware.
 104 endmenu
 105
 106 menu "Compression Support"
 107
 108 config LZ4
 109         bool "Enable LZ4 decompression support"
 110         help
 111           If this option is set, support for LZ4 compressed images
 112           is included. The LZ4 algorithm can run in-place as long as the
 113           compressed image is loaded to the end of the output buffer, and
 114           trades lower compression ratios for much faster decompression.
 115
 116           NOTE: This implements the release version of the LZ4 frame
 117           format as generated by default by the 'lz4' command line tool.
 118           This is not the same as the outdated, less efficient legacy
 119           frame format currently (2015) implemented in the Linux kernel
 120           (generated by 'lz4 -l'). The two formats are incompatible.
 121
 122 endmenu
 123
 124 config ERRNO_STR
 125         bool "Enable function for getting errno-related string message"
 126         help
 127           The function errno_str(int errno), returns a pointer to the errno
 128           corresponding text message:
 129           - if errno is null or positive number - a pointer to "Success" message
 130           - if errno is negative - a pointer to errno related message
 131
 132 config OF_LIBFDT
 133         bool "Enable the FDT library"
 134         default y if OF_CONTROL
 135         help
 136           This enables the FDT library (libfdt). It provides functions for
 137           accessing binary device tree images in memory, such as adding and
 138           removing notes and properties, scanning through the tree and finding
 139           particular compatible nodes. The library operates on a flattened
 140           version of the device tree.
 141
 142 config SPL_OF_LIBFDT
 143         bool "Enable the FDT library for SPL"
 144         default y if SPL_OF_CONTROL
 145         help
 146           This enables the FDT library (libfdt). It provides functions for
 147           accessing binary device tree images in memory, such as adding and
 148           removing notes and properties, scanning through the tree and finding
 149           particular compatible nodes. The library operates on a flattened
 150           version of the device tree.
 151
 152 source lib/efi/Kconfig
 153 source lib/efi_loader/Kconfig
 154
 155 endmenu