1menu "Library routines" 2 3config BCH 4 bool "Enable Software based BCH ECC" 5 help 6 Enables software based BCH ECC algorithm present in lib/bch.c 7 This is used by SoC platforms which do not have built-in ELM 8 hardware engine required for BCH ECC correction. 9 10config CC_OPTIMIZE_LIBS_FOR_SPEED 11 bool "Optimize libraries for speed" 12 help 13 Enabling this option will pass "-O2" to gcc when compiling 14 under "lib" directory. 15 16 If unsure, say N. 17 18config DYNAMIC_CRC_TABLE 19 bool "Enable Dynamic tables for CRC" 20 help 21 Enable this option to calculate entries for CRC tables at runtime. 22 This can be helpful when reducing the size of the build image 23 24config HAVE_PRIVATE_LIBGCC 25 bool 26 27config LIB_UUID 28 bool 29 30config USE_PRIVATE_LIBGCC 31 bool "Use private libgcc" 32 depends on HAVE_PRIVATE_LIBGCC 33 default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS) 34 help 35 This option allows you to use the built-in libgcc implementation 36 of U-Boot instead of the one provided by the compiler. 37 If unsure, say N. 38 39config SYS_HZ 40 int 41 default 1000 42 help 43 The frequency of the timer returned by get_timer(). 44 get_timer() must operate in milliseconds and this option must be 45 set to 1000. 46 47config USE_TINY_PRINTF 48 bool "Enable tiny printf() version" 49 help 50 This option enables a tiny, stripped down printf version. 51 This should only be used in space limited environments, 52 like SPL versions with hard memory limits. This version 53 reduces the code size by about 2.5KiB on armv7. 54 55 The supported format specifiers are %c, %s, %u/%d and %x. 56 57config PANIC_HANG 58 bool "Do not reset the system on fatal error" 59 help 60 Define this option to stop the system in case of a fatal error, 61 so that you have to reset it manually. This is probably NOT a good 62 idea for an embedded system where you want the system to reboot 63 automatically as fast as possible, but it may be useful during 64 development since you can try to debug the conditions that lead to 65 the situation. 66 67config REGEX 68 bool "Enable regular expression support" 69 default y if NET 70 help 71 If this variable is defined, U-Boot is linked against the 72 SLRE (Super Light Regular Expression) library, which adds 73 regex support to some commands, for example "env grep" and 74 "setexpr". 75 76choice 77 prompt "Pseudo-random library support type" 78 depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID 79 default LIB_RAND 80 help 81 Select the library to provide pseudo-random number generator 82 functions. LIB_HW_RAND supports certain hardware engines that 83 provide this functionality. If in doubt, select LIB_RAND. 84 85config LIB_RAND 86 bool "Pseudo-random library support" 87 88config LIB_HW_RAND 89 bool "HW Engine for random libray support" 90 91endchoice 92 93config SPL_TINY_MEMSET 94 bool "Use a very small memset() in SPL" 95 help 96 The faster memset() is the arch-specific one (if available) enabled 97 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get 98 better performance by writing a word at a time. But in very 99 size-constrained envrionments even this may be too big. Enable this 100 option to reduce code size slightly at the cost of some speed. 101 102config TPL_TINY_MEMSET 103 bool "Use a very small memset() in TPL" 104 help 105 The faster memset() is the arch-specific one (if available) enabled 106 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get 107 better performance by writing a word at a time. But in very 108 size-constrained envrionments even this may be too big. Enable this 109 option to reduce code size slightly at the cost of some speed. 110 111config RBTREE 112 bool 113 114config BITREVERSE 115 bool "Bit reverse library from Linux" 116 117source lib/dhry/Kconfig 118 119menu "Security support" 120 121config AES 122 bool "Support the AES algorithm" 123 help 124 This provides a means to encrypt and decrypt data using the AES 125 (Advanced Encryption Standard). This algorithm uses a symetric key 126 and is widely used as a streaming cipher. Different key lengths are 127 supported by the algorithm but only a 128-bit key is supported at 128 present. 129 130source lib/rsa/Kconfig 131 132config TPM 133 bool "Trusted Platform Module (TPM) Support" 134 depends on DM 135 help 136 This enables support for TPMs which can be used to provide security 137 features for your board. The TPM can be connected via LPC or I2C 138 and a sandbox TPM is provided for testing purposes. Use the 'tpm' 139 command to interactive the TPM. Driver model support is provided 140 for the low-level TPM interface, but only one TPM is supported at 141 a time by the TPM library. 142 143endmenu 144 145menu "Hashing Support" 146 147config SHA1 148 bool "Enable SHA1 support" 149 help 150 This option enables support of hashing using SHA1 algorithm. 151 The hash is calculated in software. 152 The SHA1 algorithm produces a 160-bit (20-byte) hash value 153 (digest). 154 155config SHA256 156 bool "Enable SHA256 support" 157 help 158 This option enables support of hashing using SHA256 algorithm. 159 The hash is calculated in software. 160 The SHA256 algorithm produces a 256-bit (32-byte) hash value 161 (digest). 162 163config SHA_HW_ACCEL 164 bool "Enable hashing using hardware" 165 help 166 This option enables hardware acceleration 167 for SHA1/SHA256 hashing. 168 This affects the 'hash' command and also the 169 hash_lookup_algo() function. 170 171config SHA_PROG_HW_ACCEL 172 bool "Enable Progressive hashing support using hardware" 173 depends on SHA_HW_ACCEL 174 help 175 This option enables hardware-acceleration for 176 SHA1/SHA256 progressive hashing. 177 Data can be streamed in a block at a time and the hashing 178 is performed in hardware. 179 180config MD5 181 bool 182 183config CRC32C 184 bool 185 186endmenu 187 188menu "Compression Support" 189 190config LZ4 191 bool "Enable LZ4 decompression support" 192 help 193 If this option is set, support for LZ4 compressed images 194 is included. The LZ4 algorithm can run in-place as long as the 195 compressed image is loaded to the end of the output buffer, and 196 trades lower compression ratios for much faster decompression. 197 198 NOTE: This implements the release version of the LZ4 frame 199 format as generated by default by the 'lz4' command line tool. 200 This is not the same as the outdated, less efficient legacy 201 frame format currently (2015) implemented in the Linux kernel 202 (generated by 'lz4 -l'). The two formats are incompatible. 203 204config LZMA 205 bool "Enable LZMA decompression support" 206 help 207 This enables support for LZMA (Lempel-Ziv-Markov chain algorithm), 208 a dictionary compression algorithm that provides a high compression 209 ratio and fairly fast decompression speed. See also 210 CONFIG_CMD_LZMADEC which provides a decode command. 211 212config LZO 213 bool "Enable LZO decompression support" 214 help 215 This enables support for LZO compression algorithm.r 216 217config SPL_LZO 218 bool "Enable LZO decompression support in SPL" 219 help 220 This enables support for LZO compression algorithm in the SPL. 221 222config SPL_GZIP 223 bool "Enable gzip decompression support for SPL build" 224 select SPL_ZLIB 225 help 226 This enables support for GZIP compression altorithm for SPL boot. 227 228config SPL_ZLIB 229 bool 230 help 231 This enables compression lib for SPL boot. 232 233endmenu 234 235config ERRNO_STR 236 bool "Enable function for getting errno-related string message" 237 help 238 The function errno_str(int errno), returns a pointer to the errno 239 corresponding text message: 240 - if errno is null or positive number - a pointer to "Success" message 241 - if errno is negative - a pointer to errno related message 242 243config OF_LIBFDT 244 bool "Enable the FDT library" 245 default y if OF_CONTROL 246 help 247 This enables the FDT library (libfdt). It provides functions for 248 accessing binary device tree images in memory, such as adding and 249 removing nodes and properties, scanning through the tree and finding 250 particular compatible nodes. The library operates on a flattened 251 version of the device tree. 252 253config OF_LIBFDT_OVERLAY 254 bool "Enable the FDT library overlay support" 255 help 256 This enables the FDT library (libfdt) overlay support. 257 258config SPL_OF_LIBFDT 259 bool "Enable the FDT library for SPL" 260 default y if SPL_OF_CONTROL 261 help 262 This enables the FDT library (libfdt). It provides functions for 263 accessing binary device tree images in memory, such as adding and 264 removing nodes and properties, scanning through the tree and finding 265 particular compatible nodes. The library operates on a flattened 266 version of the device tree. 267 268config FDT_FIXUP_PARTITIONS 269 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'" 270 depends on OF_LIBFDT 271 default n 272 help 273 Allow overwriting defined partitions in the device tree blob 274 using partition info defined in the 'mtdparts' environment 275 variable. 276 277menu "System tables" 278 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER) 279 280config GENERATE_SMBIOS_TABLE 281 bool "Generate an SMBIOS (System Management BIOS) table" 282 default y 283 depends on X86 || EFI_LOADER 284 help 285 The System Management BIOS (SMBIOS) specification addresses how 286 motherboard and system vendors present management information about 287 their products in a standard format by extending the BIOS interface 288 on Intel architecture systems. 289 290 Check http://www.dmtf.org/standards/smbios for details. 291 292config SMBIOS_MANUFACTURER 293 string "SMBIOS Manufacturer" 294 depends on GENERATE_SMBIOS_TABLE 295 default SYS_VENDOR 296 help 297 The board manufacturer to store in SMBIOS structures. 298 Change this to override the default one (CONFIG_SYS_VENDOR). 299 300config SMBIOS_PRODUCT_NAME 301 string "SMBIOS Product Name" 302 depends on GENERATE_SMBIOS_TABLE 303 default SYS_BOARD 304 help 305 The product name to store in SMBIOS structures. 306 Change this to override the default one (CONFIG_SYS_BOARD). 307 308endmenu 309 310source lib/efi/Kconfig 311source lib/efi_loader/Kconfig 312source lib/optee/Kconfig 313 314endmenu 315