xref: /openbmc/u-boot/lib/Kconfig (revision 7da7ff54) 
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 "Hashing Support"
191
192config SHA1
193	bool "Enable SHA1 support"
194	help
195	  This option enables support of hashing using SHA1 algorithm.
196	  The hash is calculated in software.
197	  The SHA1 algorithm produces a 160-bit (20-byte) hash value
198	  (digest).
199
200config SHA256
201	bool "Enable SHA256 support"
202	help
203	  This option enables support of hashing using SHA256 algorithm.
204	  The hash is calculated in software.
205	  The SHA256 algorithm produces a 256-bit (32-byte) hash value
206	  (digest).
207
208config SHA_HW_ACCEL
209	bool "Enable hashing using hardware"
210	help
211	  This option enables hardware acceleration
212	  for SHA1/SHA256 hashing.
213	  This affects the 'hash' command and also the
214	  hash_lookup_algo() function.
215
216config SHA_PROG_HW_ACCEL
217	bool "Enable Progressive hashing support using hardware"
218	depends on SHA_HW_ACCEL
219	help
220	  This option enables hardware-acceleration for
221	  SHA1/SHA256 progressive hashing.
222	  Data can be streamed in a block at a time and the hashing
223	  is performed in hardware.
224
225config MD5
226	bool
227
228config CRC32C
229	bool
230
231endmenu
232
233menu "Compression Support"
234
235config LZ4
236	bool "Enable LZ4 decompression support"
237	help
238	  If this option is set, support for LZ4 compressed images
239	  is included. The LZ4 algorithm can run in-place as long as the
240	  compressed image is loaded to the end of the output buffer, and
241	  trades lower compression ratios for much faster decompression.
242
243	  NOTE: This implements the release version of the LZ4 frame
244	  format as generated by default by the 'lz4' command line tool.
245	  This is not the same as the outdated, less efficient legacy
246	  frame format currently (2015) implemented in the Linux kernel
247	  (generated by 'lz4 -l'). The two formats are incompatible.
248
249config LZMA
250	bool "Enable LZMA decompression support"
251	help
252	  This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
253	  a dictionary compression algorithm that provides a high compression
254	  ratio and fairly fast decompression speed. See also
255	  CONFIG_CMD_LZMADEC which provides a decode command.
256
257config LZO
258	bool "Enable LZO decompression support"
259	help
260	  This enables support for LZO compression algorithm.r
261
262config SPL_LZO
263	bool "Enable LZO decompression support in SPL"
264	help
265	  This enables support for LZO compression algorithm in the SPL.
266
267config SPL_GZIP
268	bool "Enable gzip decompression support for SPL build"
269	select SPL_ZLIB
270	help
271	  This enables support for GZIP compression altorithm for SPL boot.
272
273config SPL_ZLIB
274	bool
275	help
276	  This enables compression lib for SPL boot.
277
278endmenu
279
280config ERRNO_STR
281	bool "Enable function for getting errno-related string message"
282	help
283	  The function errno_str(int errno), returns a pointer to the errno
284	  corresponding text message:
285	  - if errno is null or positive number - a pointer to "Success" message
286	  - if errno is negative - a pointer to errno related message
287
288config HEXDUMP
289	bool "Enable hexdump"
290	help
291	  This enables functions for printing dumps of binary data.
292
293config OF_LIBFDT
294	bool "Enable the FDT library"
295	default y if OF_CONTROL
296	help
297	  This enables the FDT library (libfdt). It provides functions for
298	  accessing binary device tree images in memory, such as adding and
299	  removing nodes and properties, scanning through the tree and finding
300	  particular compatible nodes. The library operates on a flattened
301	  version of the device tree.
302
303config OF_LIBFDT_OVERLAY
304	bool "Enable the FDT library overlay support"
305	depends on OF_LIBFDT
306	default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE
307	help
308	  This enables the FDT library (libfdt) overlay support.
309
310config SPL_OF_LIBFDT
311	bool "Enable the FDT library for SPL"
312	default y if SPL_OF_CONTROL
313	help
314	  This enables the FDT library (libfdt). It provides functions for
315	  accessing binary device tree images in memory, such as adding and
316	  removing nodes and properties, scanning through the tree and finding
317	  particular compatible nodes. The library operates on a flattened
318	  version of the device tree.
319
320config FDT_FIXUP_PARTITIONS
321	bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
322	depends on OF_LIBFDT
323	default n
324	help
325	  Allow overwriting defined partitions in the device tree blob
326	  using partition info defined in the 'mtdparts' environment
327	  variable.
328
329menu "System tables"
330	depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
331
332config GENERATE_SMBIOS_TABLE
333	bool "Generate an SMBIOS (System Management BIOS) table"
334	default y
335	depends on X86 || EFI_LOADER
336	help
337	  The System Management BIOS (SMBIOS) specification addresses how
338	  motherboard and system vendors present management information about
339	  their products in a standard format by extending the BIOS interface
340	  on Intel architecture systems.
341
342	  Check http://www.dmtf.org/standards/smbios for details.
343
344config SMBIOS_MANUFACTURER
345	string "SMBIOS Manufacturer"
346	depends on GENERATE_SMBIOS_TABLE
347	default SYS_VENDOR
348	help
349	  The board manufacturer to store in SMBIOS structures.
350	  Change this to override the default one (CONFIG_SYS_VENDOR).
351
352config SMBIOS_PRODUCT_NAME
353	string "SMBIOS Product Name"
354	depends on GENERATE_SMBIOS_TABLE
355	default SYS_BOARD
356	help
357	  The product name to store in SMBIOS structures.
358	  Change this to override the default one (CONFIG_SYS_BOARD).
359
360endmenu
361
362source lib/efi/Kconfig
363source lib/efi_loader/Kconfig
364source lib/optee/Kconfig
365
366endmenu
367