xref: /openbmc/u-boot/lib/Kconfig (revision 4bb656e9)
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
131config OF_LIBFDT
132	bool "Enable the FDT library"
133	default y if OF_CONTROL
134	help
135	  This enables the FDT library (libfdt). It provides functions for
136	  accessing binary device tree images in memory, such as adding and
137	  removing notes and properties, scanning through the tree and finding
138	  particular compatible nodes. The library operates on a flattened
139	  version of the device tree.
140
141config SPL_OF_LIBFDT
142	bool "Enable the FDT library for SPL"
143	default y if SPL_OF_CONTROL
144	help
145	  This enables the FDT library (libfdt). It provides functions for
146	  accessing binary device tree images in memory, such as adding and
147	  removing notes and properties, scanning through the tree and finding
148	  particular compatible nodes. The library operates on a flattened
149	  version of the device tree.
150
151source lib/efi/Kconfig
152source lib/efi_loader/Kconfig
153
154endmenu
155