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
37 select SPL_STRTO if !USE_TINY_PRINTF
42 select TPL_STRTO if !USE_TINY_PRINTF
67 config IMAGE_SPARSE_FILLBUF_SIZE
68 hex "Android sparse image CHUNK_TYPE_FILL buffer size"
70 depends on IMAGE_SPARSE
72 Set the size of the fill buffer used when processing CHUNK_TYPE_FILL
75 config USE_PRIVATE_LIBGCC
76 bool "Use private libgcc"
77 depends on HAVE_PRIVATE_LIBGCC
78 default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
80 This option allows you to use the built-in libgcc implementation
81 of U-Boot instead of the one provided by the compiler.
88 The frequency of the timer returned by get_timer().
89 get_timer() must operate in milliseconds and this option must be
92 config USE_TINY_PRINTF
93 bool "Enable tiny printf() version"
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.
100 The supported format specifiers are %c, %s, %u/%d and %x.
103 bool "Do not reset the system on fatal error"
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
113 bool "Enable regular expression support"
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
122 prompt "Pseudo-random library support type"
123 depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID
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.
131 bool "Pseudo-random library support"
134 bool "HW Engine for random libray support"
138 config SPL_TINY_MEMSET
139 bool "Use a very small memset() in SPL"
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.
147 config TPL_TINY_MEMSET
148 bool "Use a very small memset() in TPL"
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.
160 bool "Bit reverse library from Linux"
162 source lib/dhry/Kconfig
164 menu "Security support"
167 bool "Support the AES algorithm"
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
175 source lib/rsa/Kconfig
178 bool "Trusted Platform Module (TPM) Support"
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.
190 menu "Android Verified Boot"
193 bool "Android Verified Boot 2.0 support"
194 depends on ANDROID_BOOT_IMAGE
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
204 menu "Hashing Support"
207 bool "Enable SHA1 support"
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
215 bool "Enable SHA256 support"
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
223 bool "Enable hashing using hardware"
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.
230 config SHA_PROG_HW_ACCEL
231 bool "Enable Progressive hashing support using hardware"
232 depends on SHA_HW_ACCEL
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.
247 menu "Compression Support"
250 bool "Enable LZ4 decompression support"
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.
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.
264 bool "Enable LZMA decompression support"
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.
272 bool "Enable LZO decompression support"
274 This enables support for LZO compression algorithm.r
277 bool "Enable LZO decompression support in SPL"
279 This enables support for LZO compression algorithm in the SPL.
282 bool "Enable gzip decompression support for SPL build"
285 This enables support for GZIP compression altorithm for SPL boot.
290 This enables compression lib for SPL boot.
295 bool "Enable function for getting errno-related string message"
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
303 bool "Enable hexdump"
305 This enables functions for printing dumps of binary data.
308 bool "Enable the FDT library"
309 default y if OF_CONTROL
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.
317 config OF_LIBFDT_OVERLAY
318 bool "Enable the FDT library overlay support"
320 default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE
322 This enables the FDT library (libfdt) overlay support.
325 bool "Enable the FDT library for SPL"
326 default y if SPL_OF_CONTROL
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.
334 config FDT_FIXUP_PARTITIONS
335 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
339 Allow overwriting defined partitions in the device tree blob
340 using partition info defined in the 'mtdparts' environment
344 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
346 config GENERATE_SMBIOS_TABLE
347 bool "Generate an SMBIOS (System Management BIOS) table"
349 depends on X86 || EFI_LOADER
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.
356 Check http://www.dmtf.org/standards/smbios for details.
358 config SMBIOS_MANUFACTURER
359 string "SMBIOS Manufacturer"
360 depends on GENERATE_SMBIOS_TABLE
363 The board manufacturer to store in SMBIOS structures.
364 Change this to override the default one (CONFIG_SYS_VENDOR).
366 config SMBIOS_PRODUCT_NAME
367 string "SMBIOS Product Name"
368 depends on GENERATE_SMBIOS_TABLE
371 The product name to store in SMBIOS structures.
372 Change this to override the default one (CONFIG_SYS_BOARD).
376 source lib/efi/Kconfig
377 source lib/efi_loader/Kconfig
378 source lib/optee/Kconfig