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 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 39config USE_TINY_PRINTF 40 bool "Enable tiny printf() version" 41 help 42 This option enables a tiny, stripped down printf version. 43 This should only be used in space limited environments, 44 like SPL versions with hard memory limits. This version 45 reduces the code size by about 2.5KiB on armv7. 46 47 The supported format specifiers are %c, %s, %u/%d and %x. 48 49config REGEX 50 bool "Enable regular expression support" 51 default y if NET 52 help 53 If this variable is defined, U-Boot is linked against the 54 SLRE (Super Light Regular Expression) library, which adds 55 regex support to some commands, for example "env grep" and 56 "setexpr". 57 58config LIB_RAND 59 bool "Pseudo-random library support " 60 help 61 This library provides pseudo-random number generator functions. 62 63source lib/dhry/Kconfig 64 65source lib/rsa/Kconfig 66 67config TPM 68 bool "Trusted Platform Module (TPM) Support" 69 depends on DM 70 help 71 This enables support for TPMs which can be used to provide security 72 features for your board. The TPM can be connected via LPC or I2C 73 and a sandbox TPM is provided for testing purposes. Use the 'tpm' 74 command to interactive the TPM. Driver model support is provided 75 for the low-level TPM interface, but only one TPM is supported at 76 a time by the TPM library. 77 78menu "Hashing Support" 79 80config SHA1 81 bool "Enable SHA1 support" 82 help 83 This option enables support of hashing using SHA1 algorithm. 84 The hash is calculated in software. 85 The SHA1 algorithm produces a 160-bit (20-byte) hash value 86 (digest). 87 88config SHA256 89 bool "Enable SHA256 support" 90 help 91 This option enables support of hashing using SHA256 algorithm. 92 The hash is calculated in software. 93 The SHA256 algorithm produces a 256-bit (32-byte) hash value 94 (digest). 95 96config SHA_HW_ACCEL 97 bool "Enable hashing using hardware" 98 help 99 This option enables hardware acceleration 100 for SHA1/SHA256 hashing. 101 This affects the 'hash' command and also the 102 hash_lookup_algo() function. 103 104config SHA_PROG_HW_ACCEL 105 bool "Enable Progressive hashing support using hardware" 106 depends on SHA_HW_ACCEL 107 help 108 This option enables hardware-acceleration for 109 SHA1/SHA256 progressive hashing. 110 Data can be streamed in a block at a time and the hashing 111 is performed in hardware. 112endmenu 113 114menu "Compression Support" 115 116config LZ4 117 bool "Enable LZ4 decompression support" 118 help 119 If this option is set, support for LZ4 compressed images 120 is included. The LZ4 algorithm can run in-place as long as the 121 compressed image is loaded to the end of the output buffer, and 122 trades lower compression ratios for much faster decompression. 123 124 NOTE: This implements the release version of the LZ4 frame 125 format as generated by default by the 'lz4' command line tool. 126 This is not the same as the outdated, less efficient legacy 127 frame format currently (2015) implemented in the Linux kernel 128 (generated by 'lz4 -l'). The two formats are incompatible. 129 130endmenu 131 132config ERRNO_STR 133 bool "Enable function for getting errno-related string message" 134 help 135 The function errno_str(int errno), returns a pointer to the errno 136 corresponding text message: 137 - if errno is null or positive number - a pointer to "Success" message 138 - if errno is negative - a pointer to errno related message 139 140source lib/efi/Kconfig 141 142endmenu 143