1 menu "Library routines"
3 config CC_OPTIMIZE_LIBS_FOR_SPEED
4 bool "Optimize libraries for speed"
6 Enabling this option will pass "-O2" to gcc when compiling
11 config HAVE_PRIVATE_LIBGCC
14 config USE_PRIVATE_LIBGCC
15 bool "Use private libgcc"
16 depends on HAVE_PRIVATE_LIBGCC
18 This option allows you to use the built-in libgcc implementation
19 of U-boot instead of the one privided by the compiler.
26 The frequency of the timer returned by get_timer().
27 get_timer() must operate in milliseconds and this option must be
31 bool "Enable safe version of sprintf()"
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.
39 config USE_TINY_PRINTF
40 bool "Enable tiny printf() version"
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.
47 The supported format specifiers are %c, %s, %u/%d and %x.
50 bool "Enable regular expression support"
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
59 bool "Pseudo-random library support "
61 This library provides pseudo-random number generator functions.
63 source lib/dhry/Kconfig
65 source lib/rsa/Kconfig
68 bool "Trusted Platform Module (TPM) Support"
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.
78 menu "Hashing Support"
81 bool "Enable SHA1 support"
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
89 bool "Enable SHA256 support"
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
97 bool "Enable hashing using hardware"
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.
104 config SHA_PROG_HW_ACCEL
105 bool "Enable Progressive hashing support using hardware"
106 depends on SHA_HW_ACCEL
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.
114 menu "Compression Support"
117 bool "Enable LZ4 decompression support"
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.
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.
133 bool "Enable function for getting errno-related string message"
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
140 source lib/efi/Kconfig