xref: /openbmc/u-boot/lib/Kconfig (revision f77d4410) 
1menu "Library routines"
2
3config BCH
4	bool "Enable Software based BCH ECC"
5	help
6	  Enables software based BCH ECC algorithm present in lib/bch.c
7	  This is used by SoC platforms which do not have built-in ELM
8	  hardware engine required for BCH ECC correction.
9
10config CC_OPTIMIZE_LIBS_FOR_SPEED
11	bool "Optimize libraries for speed"
12	help
13	  Enabling this option will pass "-O2" to gcc when compiling
14	  under "lib" directory.
15
16	  If unsure, say N.
17
18config DYNAMIC_CRC_TABLE
19	bool "Enable Dynamic tables for CRC"
20	help
21	  Enable this option to calculate entries for CRC tables at runtime.
22	  This can be helpful when reducing the size of the build image
23
24config HAVE_PRIVATE_LIBGCC
25	bool
26
27config LIB_UUID
28	bool
29
30config PRINTF
31	bool
32	default y
33
34config SPL_PRINTF
35	bool
36	select SPL_SPRINTF
37	select SPL_STRTO if !USE_TINY_PRINTF
38
39config TPL_PRINTF
40	bool
41	select TPL_SPRINTF
42	select TPL_STRTO if !USE_TINY_PRINTF
43
44config SPRINTF
45	bool
46	default y
47
48config SPL_SPRINTF
49	bool
50
51config TPL_SPRINTF
52	bool
53
54config STRTO
55	bool
56	default y
57
58config SPL_STRTO
59	bool
60
61config TPL_STRTO
62	bool
63
64config IMAGE_SPARSE
65	bool
66
67config IMAGE_SPARSE_FILLBUF_SIZE
68	hex "Android sparse image CHUNK_TYPE_FILL buffer size"
69	default 0x80000
70	depends on IMAGE_SPARSE
71	help
72	  Set the size of the fill buffer used when processing CHUNK_TYPE_FILL
73	  chunks.
74
75config USE_PRIVATE_LIBGCC
76	bool "Use private libgcc"
77	depends on HAVE_PRIVATE_LIBGCC
78	default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
79	help
80	  This option allows you to use the built-in libgcc implementation
81	  of U-Boot instead of the one provided by the compiler.
82	  If unsure, say N.
83
84config SYS_HZ
85	int
86	default 1000
87	help
88	  The frequency of the timer returned by get_timer().
89	  get_timer() must operate in milliseconds and this option must be
90	  set to 1000.
91
92config USE_TINY_PRINTF
93	bool "Enable tiny printf() version"
94	help
95	  This option enables a tiny, stripped down printf version.
96	  This should only be used in space limited environments,
97	  like SPL versions with hard memory limits. This version
98	  reduces the code size by about 2.5KiB on armv7.
99
100	  The supported format specifiers are %c, %s, %u/%d and %x.
101
102config PANIC_HANG
103	bool "Do not reset the system on fatal error"
104	help
105	  Define this option to stop the system in case of a fatal error,
106	  so that you have to reset it manually. This is probably NOT a good
107	  idea for an embedded system where you want the system to reboot
108	  automatically as fast as possible, but it may be useful during
109	  development since you can try to debug the conditions that lead to
110	  the situation.
111
112config REGEX
113	bool "Enable regular expression support"
114	default y if NET
115	help
116	  If this variable is defined, U-Boot is linked against the
117	  SLRE (Super Light Regular Expression) library, which adds
118	  regex support to some commands, for example "env grep" and
119	  "setexpr".
120
121choice
122	prompt "Pseudo-random library support type"
123	depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID
124	default LIB_RAND
125	help
126	  Select the library to provide pseudo-random number generator
127	  functions.  LIB_HW_RAND supports certain hardware engines that
128	  provide this functionality.  If in doubt, select LIB_RAND.
129
130config LIB_RAND
131	bool "Pseudo-random library support"
132
133config LIB_HW_RAND
134	bool "HW Engine for random libray support"
135
136endchoice
137
138config SPL_TINY_MEMSET
139	bool "Use a very small memset() in SPL"
140	help
141	  The faster memset() is the arch-specific one (if available) enabled
142	  by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
143	  better performance by writing a word at a time. But in very
144	  size-constrained envrionments even this may be too big. Enable this
145	  option to reduce code size slightly at the cost of some speed.
146
147config TPL_TINY_MEMSET
148	bool "Use a very small memset() in TPL"
149	help
150	  The faster memset() is the arch-specific one (if available) enabled
151	  by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
152	  better performance by writing a word at a time. But in very
153	  size-constrained envrionments even this may be too big. Enable this
154	  option to reduce code size slightly at the cost of some speed.
155
156config RBTREE
157	bool
158
159config BITREVERSE
160	bool "Bit reverse library from Linux"
161
162source lib/dhry/Kconfig
163
164menu "Security support"
165
166config AES
167	bool "Support the AES algorithm"
168	help
169	  This provides a means to encrypt and decrypt data using the AES
170	  (Advanced Encryption Standard). This algorithm uses a symetric key
171	  and is widely used as a streaming cipher. Different key lengths are
172	  supported by the algorithm but only a 128-bit key is supported at
173	  present.
174
175source lib/rsa/Kconfig
176
177config TPM
178	bool "Trusted Platform Module (TPM) Support"
179	depends on DM
180	help
181	  This enables support for TPMs which can be used to provide security
182	  features for your board. The TPM can be connected via LPC or I2C
183	  and a sandbox TPM is provided for testing purposes. Use the 'tpm'
184	  command to interactive the TPM. Driver model support is provided
185	  for the low-level TPM interface, but only one TPM is supported at
186	  a time by the TPM library.
187
188endmenu
189
190menu "Android Verified Boot"
191
192config LIBAVB
193	bool "Android Verified Boot 2.0 support"
194	depends on ANDROID_BOOT_IMAGE
195	default n
196	help
197	  This enables support of Android Verified Boot 2.0 which can be used
198	  to assure the end user of the integrity of the software running on a
199	  device. Introduces such features as boot chain of trust, rollback
200	  protection etc.
201
202endmenu
203
204menu "Hashing Support"
205
206config SHA1
207	bool "Enable SHA1 support"
208	help
209	  This option enables support of hashing using SHA1 algorithm.
210	  The hash is calculated in software.
211	  The SHA1 algorithm produces a 160-bit (20-byte) hash value
212	  (digest).
213
214config SHA256
215	bool "Enable SHA256 support"
216	help
217	  This option enables support of hashing using SHA256 algorithm.
218	  The hash is calculated in software.
219	  The SHA256 algorithm produces a 256-bit (32-byte) hash value
220	  (digest).
221
222config SHA_HW_ACCEL
223	bool "Enable hashing using hardware"
224	help
225	  This option enables hardware acceleration
226	  for SHA1/SHA256 hashing.
227	  This affects the 'hash' command and also the
228	  hash_lookup_algo() function.
229
230config SHA_PROG_HW_ACCEL
231	bool "Enable Progressive hashing support using hardware"
232	depends on SHA_HW_ACCEL
233	help
234	  This option enables hardware-acceleration for
235	  SHA1/SHA256 progressive hashing.
236	  Data can be streamed in a block at a time and the hashing
237	  is performed in hardware.
238
239config MD5
240	bool
241
242config CRC32C
243	bool
244
245endmenu
246
247menu "Compression Support"
248
249config LZ4
250	bool "Enable LZ4 decompression support"
251	help
252	  If this option is set, support for LZ4 compressed images
253	  is included. The LZ4 algorithm can run in-place as long as the
254	  compressed image is loaded to the end of the output buffer, and
255	  trades lower compression ratios for much faster decompression.
256
257	  NOTE: This implements the release version of the LZ4 frame
258	  format as generated by default by the 'lz4' command line tool.
259	  This is not the same as the outdated, less efficient legacy
260	  frame format currently (2015) implemented in the Linux kernel
261	  (generated by 'lz4 -l'). The two formats are incompatible.
262
263config LZMA
264	bool "Enable LZMA decompression support"
265	help
266	  This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
267	  a dictionary compression algorithm that provides a high compression
268	  ratio and fairly fast decompression speed. See also
269	  CONFIG_CMD_LZMADEC which provides a decode command.
270
271config LZO
272	bool "Enable LZO decompression support"
273	help
274	  This enables support for LZO compression algorithm.r
275
276config SPL_LZO
277	bool "Enable LZO decompression support in SPL"
278	help
279	  This enables support for LZO compression algorithm in the SPL.
280
281config SPL_GZIP
282	bool "Enable gzip decompression support for SPL build"
283	select SPL_ZLIB
284	help
285	  This enables support for GZIP compression altorithm for SPL boot.
286
287config SPL_ZLIB
288	bool
289	help
290	  This enables compression lib for SPL boot.
291
292endmenu
293
294config ERRNO_STR
295	bool "Enable function for getting errno-related string message"
296	help
297	  The function errno_str(int errno), returns a pointer to the errno
298	  corresponding text message:
299	  - if errno is null or positive number - a pointer to "Success" message
300	  - if errno is negative - a pointer to errno related message
301
302config HEXDUMP
303	bool "Enable hexdump"
304	help
305	  This enables functions for printing dumps of binary data.
306
307config OF_LIBFDT
308	bool "Enable the FDT library"
309	default y if OF_CONTROL
310	help
311	  This enables the FDT library (libfdt). It provides functions for
312	  accessing binary device tree images in memory, such as adding and
313	  removing nodes and properties, scanning through the tree and finding
314	  particular compatible nodes. The library operates on a flattened
315	  version of the device tree.
316
317config OF_LIBFDT_OVERLAY
318	bool "Enable the FDT library overlay support"
319	depends on OF_LIBFDT
320	default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE
321	help
322	  This enables the FDT library (libfdt) overlay support.
323
324config SPL_OF_LIBFDT
325	bool "Enable the FDT library for SPL"
326	default y if SPL_OF_CONTROL
327	help
328	  This enables the FDT library (libfdt). It provides functions for
329	  accessing binary device tree images in memory, such as adding and
330	  removing nodes and properties, scanning through the tree and finding
331	  particular compatible nodes. The library operates on a flattened
332	  version of the device tree.
333
334config FDT_FIXUP_PARTITIONS
335	bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
336	depends on OF_LIBFDT
337	depends on CMD_MTDPARTS
338	help
339	  Allow overwriting defined partitions in the device tree blob
340	  using partition info defined in the 'mtdparts' environment
341	  variable.
342
343menu "System tables"
344	depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
345
346config GENERATE_SMBIOS_TABLE
347	bool "Generate an SMBIOS (System Management BIOS) table"
348	default y
349	depends on X86 || EFI_LOADER
350	help
351	  The System Management BIOS (SMBIOS) specification addresses how
352	  motherboard and system vendors present management information about
353	  their products in a standard format by extending the BIOS interface
354	  on Intel architecture systems.
355
356	  Check http://www.dmtf.org/standards/smbios for details.
357
358config SMBIOS_MANUFACTURER
359	string "SMBIOS Manufacturer"
360	depends on GENERATE_SMBIOS_TABLE
361	default SYS_VENDOR
362	help
363	  The board manufacturer to store in SMBIOS structures.
364	  Change this to override the default one (CONFIG_SYS_VENDOR).
365
366config SMBIOS_PRODUCT_NAME
367	string "SMBIOS Product Name"
368	depends on GENERATE_SMBIOS_TABLE
369	default SYS_BOARD
370	help
371	  The product name to store in SMBIOS structures.
372	  Change this to override the default one (CONFIG_SYS_BOARD).
373
374endmenu
375
376source lib/efi/Kconfig
377source lib/efi_loader/Kconfig
378source lib/optee/Kconfig
379
380endmenu
381