xref: /openbmc/u-boot/lib/Kconfig (revision fea7f3aa) 
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