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