1menu "Library routines" 2 3config 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 11config HAVE_PRIVATE_LIBGCC 12 bool 13 14config 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 22config 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 30config USE_TINY_PRINTF 31 bool "Enable tiny printf() version" 32 help 33 This option enables a tiny, stripped down printf version. 34 This should only be used in space limited environments, 35 like SPL versions with hard memory limits. This version 36 reduces the code size by about 2.5KiB on armv7. 37 38 The supported format specifiers are %c, %s, %u/%d and %x. 39 40config REGEX 41 bool "Enable regular expression support" 42 default y if NET 43 help 44 If this variable is defined, U-Boot is linked against the 45 SLRE (Super Light Regular Expression) library, which adds 46 regex support to some commands, for example "env grep" and 47 "setexpr". 48 49config LIB_RAND 50 bool "Pseudo-random library support " 51 help 52 This library provides pseudo-random number generator functions. 53 54source lib/dhry/Kconfig 55 56source lib/rsa/Kconfig 57 58config TPM 59 bool "Trusted Platform Module (TPM) Support" 60 depends on DM 61 help 62 This enables support for TPMs which can be used to provide security 63 features for your board. The TPM can be connected via LPC or I2C 64 and a sandbox TPM is provided for testing purposes. Use the 'tpm' 65 command to interactive the TPM. Driver model support is provided 66 for the low-level TPM interface, but only one TPM is supported at 67 a time by the TPM library. 68 69menu "Hashing Support" 70 71config SHA1 72 bool "Enable SHA1 support" 73 help 74 This option enables support of hashing using SHA1 algorithm. 75 The hash is calculated in software. 76 The SHA1 algorithm produces a 160-bit (20-byte) hash value 77 (digest). 78 79config SHA256 80 bool "Enable SHA256 support" 81 help 82 This option enables support of hashing using SHA256 algorithm. 83 The hash is calculated in software. 84 The SHA256 algorithm produces a 256-bit (32-byte) hash value 85 (digest). 86 87config SHA_HW_ACCEL 88 bool "Enable hashing using hardware" 89 help 90 This option enables hardware acceleration 91 for SHA1/SHA256 hashing. 92 This affects the 'hash' command and also the 93 hash_lookup_algo() function. 94 95config SHA_PROG_HW_ACCEL 96 bool "Enable Progressive hashing support using hardware" 97 depends on SHA_HW_ACCEL 98 help 99 This option enables hardware-acceleration for 100 SHA1/SHA256 progressive hashing. 101 Data can be streamed in a block at a time and the hashing 102 is performed in hardware. 103endmenu 104 105menu "Compression Support" 106 107config LZ4 108 bool "Enable LZ4 decompression support" 109 help 110 If this option is set, support for LZ4 compressed images 111 is included. The LZ4 algorithm can run in-place as long as the 112 compressed image is loaded to the end of the output buffer, and 113 trades lower compression ratios for much faster decompression. 114 115 NOTE: This implements the release version of the LZ4 frame 116 format as generated by default by the 'lz4' command line tool. 117 This is not the same as the outdated, less efficient legacy 118 frame format currently (2015) implemented in the Linux kernel 119 (generated by 'lz4 -l'). The two formats are incompatible. 120 121endmenu 122 123config ERRNO_STR 124 bool "Enable function for getting errno-related string message" 125 help 126 The function errno_str(int errno), returns a pointer to the errno 127 corresponding text message: 128 - if errno is null or positive number - a pointer to "Success" message 129 - if errno is negative - a pointer to errno related message 130 131source lib/efi/Kconfig 132 133endmenu 134