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 config SPL_TINY_MEMSET
  56         bool "Use a very small memset() in SPL"
  57         help
  58           The faster memset() is the arch-specific one (if available) enabled
  59           by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
  60           better performance by writing a word at a time. But in very
  61           size-constrained envrionments even this may be too big. Enable this
  62           option to reduce code size slightly at the cost of some speed.
  63
  64 config TPL_TINY_MEMSET
  65         bool "Use a very small memset() in TPL"
  66         help
  67           The faster memset() is the arch-specific one (if available) enabled
  68           by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
  69           better performance by writing a word at a time. But in very
  70           size-constrained envrionments even this may be too big. Enable this
  71           option to reduce code size slightly at the cost of some speed.
  72
  73 config RBTREE
  74         bool
  75
  76 source lib/dhry/Kconfig
  77
  78 menu "Security support"
  79
  80 config AES
  81         bool "Support the AES algorithm"
  82         help
  83           This provides a means to encrypt and decrypt data using the AES
  84           (Advanced Encryption Standard). This algorithm uses a symetric key
  85           and is widely used as a streaming cipher. Different key lengths are
  86           supported by the algorithm but only a 128-bit key is supported at
  87           present.
  88
  89 source lib/rsa/Kconfig
  90
  91 config TPM
  92         bool "Trusted Platform Module (TPM) Support"
  93         depends on DM
  94         help
  95           This enables support for TPMs which can be used to provide security
  96           features for your board. The TPM can be connected via LPC or I2C
  97           and a sandbox TPM is provided for testing purposes. Use the 'tpm'
  98           command to interactive the TPM. Driver model support is provided
  99           for the low-level TPM interface, but only one TPM is supported at
 100           a time by the TPM library.
 101
 102 endmenu
 103
 104 menu "Hashing Support"
 105
 106 config SHA1
 107         bool "Enable SHA1 support"
 108         help
 109           This option enables support of hashing using SHA1 algorithm.
 110           The hash is calculated in software.
 111           The SHA1 algorithm produces a 160-bit (20-byte) hash value
 112           (digest).
 113
 114 config SHA256
 115         bool "Enable SHA256 support"
 116         help
 117           This option enables support of hashing using SHA256 algorithm.
 118           The hash is calculated in software.
 119           The SHA256 algorithm produces a 256-bit (32-byte) hash value
 120           (digest).
 121
 122 config SHA_HW_ACCEL
 123         bool "Enable hashing using hardware"
 124         help
 125           This option enables hardware acceleration
 126           for SHA1/SHA256 hashing.
 127           This affects the 'hash' command and also the
 128           hash_lookup_algo() function.
 129
 130 config SHA_PROG_HW_ACCEL
 131         bool "Enable Progressive hashing support using hardware"
 132         depends on SHA_HW_ACCEL
 133         help
 134           This option enables hardware-acceleration for
 135           SHA1/SHA256 progressive hashing.
 136           Data can be streamed in a block at a time and the hashing
 137           is performed in hardware.
 138
 139 config MD5
 140         bool
 141
 142 endmenu
 143
 144 menu "Compression Support"
 145
 146 config LZ4
 147         bool "Enable LZ4 decompression support"
 148         help
 149           If this option is set, support for LZ4 compressed images
 150           is included. The LZ4 algorithm can run in-place as long as the
 151           compressed image is loaded to the end of the output buffer, and
 152           trades lower compression ratios for much faster decompression.
 153
 154           NOTE: This implements the release version of the LZ4 frame
 155           format as generated by default by the 'lz4' command line tool.
 156           This is not the same as the outdated, less efficient legacy
 157           frame format currently (2015) implemented in the Linux kernel
 158           (generated by 'lz4 -l'). The two formats are incompatible.
 159
 160 config LZMA
 161         bool "Enable LZMA decompression support"
 162         help
 163           This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
 164           a dictionary compression algorithm that provides a high compression
 165           ratio and fairly fast decompression speed. See also
 166           CONFIG_CMD_LZMADEC which provides a decode command.
 167
 168 config LZO
 169         bool "Enable LZO decompression support"
 170         help
 171           This enables support for LZO compression algorithm.r
 172 endmenu
 173
 174 config ERRNO_STR
 175         bool "Enable function for getting errno-related string message"
 176         help
 177           The function errno_str(int errno), returns a pointer to the errno
 178           corresponding text message:
 179           - if errno is null or positive number - a pointer to "Success" message
 180           - if errno is negative - a pointer to errno related message
 181
 182 config OF_LIBFDT
 183         bool "Enable the FDT library"
 184         default y if OF_CONTROL
 185         help
 186           This enables the FDT library (libfdt). It provides functions for
 187           accessing binary device tree images in memory, such as adding and
 188           removing notes and properties, scanning through the tree and finding
 189           particular compatible nodes. The library operates on a flattened
 190           version of the device tree.
 191
 192 config OF_LIBFDT_OVERLAY
 193         bool "Enable the FDT library overlay support"
 194         help
 195           This enables the FDT library (libfdt) overlay support.
 196
 197 config SPL_OF_LIBFDT
 198         bool "Enable the FDT library for SPL"
 199         default y if SPL_OF_CONTROL
 200         help
 201           This enables the FDT library (libfdt). It provides functions for
 202           accessing binary device tree images in memory, such as adding and
 203           removing notes and properties, scanning through the tree and finding
 204           particular compatible nodes. The library operates on a flattened
 205           version of the device tree.
 206
 207 config FDT_FIXUP_PARTITIONS
 208         bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
 209         depends on OF_LIBFDT
 210         default n
 211         help
 212           Allow overwriting defined partitions in the device tree blob
 213           using partition info defined in the 'mtdparts' environment
 214           variable.
 215
 216 menu "System tables"
 217         depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
 218
 219 config GENERATE_SMBIOS_TABLE
 220         bool "Generate an SMBIOS (System Management BIOS) table"
 221         default y
 222         depends on X86 || EFI_LOADER
 223         help
 224           The System Management BIOS (SMBIOS) specification addresses how
 225           motherboard and system vendors present management information about
 226           their products in a standard format by extending the BIOS interface
 227           on Intel architecture systems.
 228
 229           Check http://www.dmtf.org/standards/smbios for details.
 230
 231 config SMBIOS_MANUFACTURER
 232         string "SMBIOS Manufacturer"
 233         depends on GENERATE_SMBIOS_TABLE
 234         default SYS_VENDOR
 235         help
 236           The board manufacturer to store in SMBIOS structures.
 237           Change this to override the default one (CONFIG_SYS_VENDOR).
 238
 239 config SMBIOS_PRODUCT_NAME
 240         string "SMBIOS Product Name"
 241         depends on GENERATE_SMBIOS_TABLE
 242         default SYS_BOARD
 243         help
 244           The product name to store in SMBIOS structures.
 245           Change this to override the default one (CONFIG_SYS_BOARD).
 246
 247 endmenu
 248
 249 source lib/efi/Kconfig
 250 source lib/efi_loader/Kconfig
 251
 252 endmenu