1 menu "Library routines"
4 bool "Enable Software based BCH ECC"
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.
10 config CC_OPTIMIZE_LIBS_FOR_SPEED
11 bool "Optimize libraries for speed"
13 Enabling this option will pass "-O2" to gcc when compiling
14 under "lib" directory.
18 config DYNAMIC_CRC_TABLE
19 bool "Enable Dynamic tables for CRC"
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
24 config HAVE_PRIVATE_LIBGCC
30 config USE_PRIVATE_LIBGCC
31 bool "Use private libgcc"
32 depends on HAVE_PRIVATE_LIBGCC
33 default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
35 This option allows you to use the built-in libgcc implementation
36 of U-Boot instead of the one provided by the compiler.
43 The frequency of the timer returned by get_timer().
44 get_timer() must operate in milliseconds and this option must be
47 config USE_TINY_PRINTF
48 bool "Enable tiny printf() version"
50 This option enables a tiny, stripped down printf version.
51 This should only be used in space limited environments,
52 like SPL versions with hard memory limits. This version
53 reduces the code size by about 2.5KiB on armv7.
55 The supported format specifiers are %c, %s, %u/%d and %x.
58 bool "Do not reset the system on fatal error"
60 Define this option to stop the system in case of a fatal error,
61 so that you have to reset it manually. This is probably NOT a good
62 idea for an embedded system where you want the system to reboot
63 automatically as fast as possible, but it may be useful during
64 development since you can try to debug the conditions that lead to
68 bool "Enable regular expression support"
69 default n if ARCH_SUNXI
72 If this variable is defined, U-Boot is linked against the
73 SLRE (Super Light Regular Expression) library, which adds
74 regex support to some commands, for example "env grep" and
78 prompt "Pseudo-random library support type"
79 depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID
82 Select the library to provide pseudo-random number generator
83 functions. LIB_HW_RAND supports certain hardware engines that
84 provide this functionality. If in doubt, select LIB_RAND.
87 bool "Pseudo-random library support"
90 bool "HW Engine for random libray support"
94 config SPL_TINY_MEMSET
95 bool "Use a very small memset() in SPL"
97 The faster memset() is the arch-specific one (if available) enabled
98 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
99 better performance by writing a word at a time. But in very
100 size-constrained envrionments even this may be too big. Enable this
101 option to reduce code size slightly at the cost of some speed.
103 config TPL_TINY_MEMSET
104 bool "Use a very small memset() in TPL"
106 The faster memset() is the arch-specific one (if available) enabled
107 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
108 better performance by writing a word at a time. But in very
109 size-constrained envrionments even this may be too big. Enable this
110 option to reduce code size slightly at the cost of some speed.
116 bool "Bit reverse library from Linux"
118 source lib/dhry/Kconfig
120 menu "Security support"
123 bool "Support the AES algorithm"
125 This provides a means to encrypt and decrypt data using the AES
126 (Advanced Encryption Standard). This algorithm uses a symetric key
127 and is widely used as a streaming cipher. Different key lengths are
128 supported by the algorithm but only a 128-bit key is supported at
131 source lib/rsa/Kconfig
134 bool "Trusted Platform Module (TPM) Support"
137 This enables support for TPMs which can be used to provide security
138 features for your board. The TPM can be connected via LPC or I2C
139 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
140 command to interactive the TPM. Driver model support is provided
141 for the low-level TPM interface, but only one TPM is supported at
142 a time by the TPM library.
146 menu "Hashing Support"
149 bool "Enable SHA1 support"
151 This option enables support of hashing using SHA1 algorithm.
152 The hash is calculated in software.
153 The SHA1 algorithm produces a 160-bit (20-byte) hash value
157 bool "Enable SHA256 support"
159 This option enables support of hashing using SHA256 algorithm.
160 The hash is calculated in software.
161 The SHA256 algorithm produces a 256-bit (32-byte) hash value
165 bool "Enable hashing using hardware"
167 This option enables hardware acceleration
168 for SHA1/SHA256 hashing.
169 This affects the 'hash' command and also the
170 hash_lookup_algo() function.
172 config SHA_PROG_HW_ACCEL
173 bool "Enable Progressive hashing support using hardware"
174 depends on SHA_HW_ACCEL
176 This option enables hardware-acceleration for
177 SHA1/SHA256 progressive hashing.
178 Data can be streamed in a block at a time and the hashing
179 is performed in hardware.
189 menu "Compression Support"
192 bool "Enable LZ4 decompression support"
194 If this option is set, support for LZ4 compressed images
195 is included. The LZ4 algorithm can run in-place as long as the
196 compressed image is loaded to the end of the output buffer, and
197 trades lower compression ratios for much faster decompression.
199 NOTE: This implements the release version of the LZ4 frame
200 format as generated by default by the 'lz4' command line tool.
201 This is not the same as the outdated, less efficient legacy
202 frame format currently (2015) implemented in the Linux kernel
203 (generated by 'lz4 -l'). The two formats are incompatible.
206 bool "Enable LZMA decompression support"
208 This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
209 a dictionary compression algorithm that provides a high compression
210 ratio and fairly fast decompression speed. See also
211 CONFIG_CMD_LZMADEC which provides a decode command.
214 bool "Enable LZO decompression support"
216 This enables support for LZO compression algorithm.r
219 bool "Enable LZO decompression support in SPL"
221 This enables support for LZO compression algorithm in the SPL.
224 bool "Enable gzip decompression support for SPL build"
227 This enables support for GZIP compression altorithm for SPL boot.
232 This enables compression lib for SPL boot.
237 bool "Enable function for getting errno-related string message"
239 The function errno_str(int errno), returns a pointer to the errno
240 corresponding text message:
241 - if errno is null or positive number - a pointer to "Success" message
242 - if errno is negative - a pointer to errno related message
245 bool "Enable the FDT library"
246 default y if OF_CONTROL
248 This enables the FDT library (libfdt). It provides functions for
249 accessing binary device tree images in memory, such as adding and
250 removing nodes and properties, scanning through the tree and finding
251 particular compatible nodes. The library operates on a flattened
252 version of the device tree.
254 config OF_LIBFDT_OVERLAY
255 bool "Enable the FDT library overlay support"
257 This enables the FDT library (libfdt) overlay support.
260 bool "Enable the FDT library for SPL"
261 default y if SPL_OF_CONTROL
263 This enables the FDT library (libfdt). It provides functions for
264 accessing binary device tree images in memory, such as adding and
265 removing nodes and properties, scanning through the tree and finding
266 particular compatible nodes. The library operates on a flattened
267 version of the device tree.
269 config FDT_FIXUP_PARTITIONS
270 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
274 Allow overwriting defined partitions in the device tree blob
275 using partition info defined in the 'mtdparts' environment
279 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
281 config GENERATE_SMBIOS_TABLE
282 bool "Generate an SMBIOS (System Management BIOS) table"
284 depends on X86 || EFI_LOADER
286 The System Management BIOS (SMBIOS) specification addresses how
287 motherboard and system vendors present management information about
288 their products in a standard format by extending the BIOS interface
289 on Intel architecture systems.
291 Check http://www.dmtf.org/standards/smbios for details.
293 config SMBIOS_MANUFACTURER
294 string "SMBIOS Manufacturer"
295 depends on GENERATE_SMBIOS_TABLE
298 The board manufacturer to store in SMBIOS structures.
299 Change this to override the default one (CONFIG_SYS_VENDOR).
301 config SMBIOS_PRODUCT_NAME
302 string "SMBIOS Product Name"
303 depends on GENERATE_SMBIOS_TABLE
306 The product name to store in SMBIOS structures.
307 Change this to override the default one (CONFIG_SYS_BOARD).
311 source lib/efi/Kconfig
312 source lib/efi_loader/Kconfig
313 source lib/optee/Kconfig