xref: /openbmc/u-boot/lib/Kconfig (revision ec48b6c9) 
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
188config SPL_TPM
189	bool "Trusted Platform Module (TPM) Support in SPL"
190	depends on SPL_DM
191	help
192	  This enables support for TPMs which can be used to provide security
193	  features for your board. The TPM can be connected via LPC or I2C
194	  and a sandbox TPM is provided for testing purposes. Use the 'tpm'
195	  command to interactive the TPM. Driver model support is provided
196	  for the low-level TPM interface, but only one TPM is supported at
197	  a time by the TPM library.
198
199config TPL_TPM
200	bool "Trusted Platform Module (TPM) Support in TPL"
201	depends on TPL_DM
202	help
203	  This enables support for TPMs which can be used to provide security
204	  features for your board. The TPM can be connected via LPC or I2C
205	  and a sandbox TPM is provided for testing purposes. Use the 'tpm'
206	  command to interactive the TPM. Driver model support is provided
207	  for the low-level TPM interface, but only one TPM is supported at
208	  a time by the TPM library.
209
210endmenu
211
212menu "Android Verified Boot"
213
214config LIBAVB
215	bool "Android Verified Boot 2.0 support"
216	depends on ANDROID_BOOT_IMAGE
217	default n
218	help
219	  This enables support of Android Verified Boot 2.0 which can be used
220	  to assure the end user of the integrity of the software running on a
221	  device. Introduces such features as boot chain of trust, rollback
222	  protection etc.
223
224endmenu
225
226menu "Hashing Support"
227
228config SHA1
229	bool "Enable SHA1 support"
230	help
231	  This option enables support of hashing using SHA1 algorithm.
232	  The hash is calculated in software.
233	  The SHA1 algorithm produces a 160-bit (20-byte) hash value
234	  (digest).
235
236config SHA256
237	bool "Enable SHA256 support"
238	help
239	  This option enables support of hashing using SHA256 algorithm.
240	  The hash is calculated in software.
241	  The SHA256 algorithm produces a 256-bit (32-byte) hash value
242	  (digest).
243
244config SHA_HW_ACCEL
245	bool "Enable hashing using hardware"
246	help
247	  This option enables hardware acceleration
248	  for SHA1/SHA256 hashing.
249	  This affects the 'hash' command and also the
250	  hash_lookup_algo() function.
251
252config SHA_PROG_HW_ACCEL
253	bool "Enable Progressive hashing support using hardware"
254	depends on SHA_HW_ACCEL
255	help
256	  This option enables hardware-acceleration for
257	  SHA1/SHA256 progressive hashing.
258	  Data can be streamed in a block at a time and the hashing
259	  is performed in hardware.
260
261config MD5
262	bool
263
264config CRC32C
265	bool
266
267endmenu
268
269menu "Compression Support"
270
271config LZ4
272	bool "Enable LZ4 decompression support"
273	help
274	  If this option is set, support for LZ4 compressed images
275	  is included. The LZ4 algorithm can run in-place as long as the
276	  compressed image is loaded to the end of the output buffer, and
277	  trades lower compression ratios for much faster decompression.
278
279	  NOTE: This implements the release version of the LZ4 frame
280	  format as generated by default by the 'lz4' command line tool.
281	  This is not the same as the outdated, less efficient legacy
282	  frame format currently (2015) implemented in the Linux kernel
283	  (generated by 'lz4 -l'). The two formats are incompatible.
284
285config LZMA
286	bool "Enable LZMA decompression support"
287	help
288	  This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
289	  a dictionary compression algorithm that provides a high compression
290	  ratio and fairly fast decompression speed. See also
291	  CONFIG_CMD_LZMADEC which provides a decode command.
292
293config LZO
294	bool "Enable LZO decompression support"
295	help
296	  This enables support for LZO compression algorithm.r
297
298config SPL_LZO
299	bool "Enable LZO decompression support in SPL"
300	help
301	  This enables support for LZO compression algorithm in the SPL.
302
303config SPL_GZIP
304	bool "Enable gzip decompression support for SPL build"
305	select SPL_ZLIB
306	help
307	  This enables support for GZIP compression altorithm for SPL boot.
308
309config SPL_ZLIB
310	bool
311	help
312	  This enables compression lib for SPL boot.
313
314endmenu
315
316config ERRNO_STR
317	bool "Enable function for getting errno-related string message"
318	help
319	  The function errno_str(int errno), returns a pointer to the errno
320	  corresponding text message:
321	  - if errno is null or positive number - a pointer to "Success" message
322	  - if errno is negative - a pointer to errno related message
323
324config HEXDUMP
325	bool "Enable hexdump"
326	help
327	  This enables functions for printing dumps of binary data.
328
329config OF_LIBFDT
330	bool "Enable the FDT library"
331	default y if OF_CONTROL
332	help
333	  This enables the FDT library (libfdt). It provides functions for
334	  accessing binary device tree images in memory, such as adding and
335	  removing nodes and properties, scanning through the tree and finding
336	  particular compatible nodes. The library operates on a flattened
337	  version of the device tree.
338
339config OF_LIBFDT_OVERLAY
340	bool "Enable the FDT library overlay support"
341	depends on OF_LIBFDT
342	default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE
343	help
344	  This enables the FDT library (libfdt) overlay support.
345
346config SPL_OF_LIBFDT
347	bool "Enable the FDT library for SPL"
348	default y if SPL_OF_CONTROL
349	help
350	  This enables the FDT library (libfdt). It provides functions for
351	  accessing binary device tree images in memory, such as adding and
352	  removing nodes and properties, scanning through the tree and finding
353	  particular compatible nodes. The library operates on a flattened
354	  version of the device tree.
355
356config TPL_OF_LIBFDT
357	bool "Enable the FDT library for TPL"
358	default y if TPL_OF_CONTROL
359	help
360	  This enables the FDT library (libfdt). It provides functions for
361	  accessing binary device tree images in memory, such as adding and
362	  removing nodes and properties, scanning through the tree and finding
363	  particular compatible nodes. The library operates on a flattened
364	  version of the device tree.
365
366config FDT_FIXUP_PARTITIONS
367	bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
368	depends on OF_LIBFDT
369	depends on CMD_MTDPARTS
370	help
371	  Allow overwriting defined partitions in the device tree blob
372	  using partition info defined in the 'mtdparts' environment
373	  variable.
374
375menu "System tables"
376	depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
377
378config GENERATE_SMBIOS_TABLE
379	bool "Generate an SMBIOS (System Management BIOS) table"
380	default y
381	depends on X86 || EFI_LOADER
382	help
383	  The System Management BIOS (SMBIOS) specification addresses how
384	  motherboard and system vendors present management information about
385	  their products in a standard format by extending the BIOS interface
386	  on Intel architecture systems.
387
388	  Check http://www.dmtf.org/standards/smbios for details.
389
390config SMBIOS_MANUFACTURER
391	string "SMBIOS Manufacturer"
392	depends on GENERATE_SMBIOS_TABLE
393	default SYS_VENDOR
394	help
395	  The board manufacturer to store in SMBIOS structures.
396	  Change this to override the default one (CONFIG_SYS_VENDOR).
397
398config SMBIOS_PRODUCT_NAME
399	string "SMBIOS Product Name"
400	depends on GENERATE_SMBIOS_TABLE
401	default SYS_BOARD
402	help
403	  The product name to store in SMBIOS structures.
404	  Change this to override the default one (CONFIG_SYS_BOARD).
405
406endmenu
407
408source lib/efi/Kconfig
409source lib/efi_loader/Kconfig
410source lib/optee/Kconfig
411
412endmenu
413