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_ARCH_IOMAP
27 Enable this option if architecture provides io{read,write}{8,16,32}
28 I/O accessor functions.
30 config HAVE_PRIVATE_LIBGCC
43 select SPL_STRTO if !USE_TINY_PRINTF
48 select TPL_STRTO if !USE_TINY_PRINTF
73 config IMAGE_SPARSE_FILLBUF_SIZE
74 hex "Android sparse image CHUNK_TYPE_FILL buffer size"
76 depends on IMAGE_SPARSE
78 Set the size of the fill buffer used when processing CHUNK_TYPE_FILL
81 config USE_PRIVATE_LIBGCC
82 bool "Use private libgcc"
83 depends on HAVE_PRIVATE_LIBGCC
84 default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
86 This option allows you to use the built-in libgcc implementation
87 of U-Boot instead of the one provided by the compiler.
94 The frequency of the timer returned by get_timer().
95 get_timer() must operate in milliseconds and this option must be
98 config USE_TINY_PRINTF
99 bool "Enable tiny printf() version"
101 This option enables a tiny, stripped down printf version.
102 This should only be used in space limited environments,
103 like SPL versions with hard memory limits. This version
104 reduces the code size by about 2.5KiB on armv7.
106 The supported format specifiers are %c, %s, %u/%d and %x.
109 bool "Do not reset the system on fatal error"
111 Define this option to stop the system in case of a fatal error,
112 so that you have to reset it manually. This is probably NOT a good
113 idea for an embedded system where you want the system to reboot
114 automatically as fast as possible, but it may be useful during
115 development since you can try to debug the conditions that lead to
119 bool "Enable regular expression support"
122 If this variable is defined, U-Boot is linked against the
123 SLRE (Super Light Regular Expression) library, which adds
124 regex support to some commands, for example "env grep" and
128 prompt "Pseudo-random library support type"
129 depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID
132 Select the library to provide pseudo-random number generator
133 functions. LIB_HW_RAND supports certain hardware engines that
134 provide this functionality. If in doubt, select LIB_RAND.
137 bool "Pseudo-random library support"
140 bool "HW Engine for random libray support"
144 config SPL_TINY_MEMSET
145 bool "Use a very small memset() in SPL"
147 The faster memset() is the arch-specific one (if available) enabled
148 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
149 better performance by writing a word at a time. But in very
150 size-constrained environments even this may be too big. Enable this
151 option to reduce code size slightly at the cost of some speed.
153 config TPL_TINY_MEMSET
154 bool "Use a very small memset() in TPL"
156 The faster memset() is the arch-specific one (if available) enabled
157 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
158 better performance by writing a word at a time. But in very
159 size-constrained environments even this may be too big. Enable this
160 option to reduce code size slightly at the cost of some speed.
166 bool "Bit reverse library from Linux"
168 source lib/dhry/Kconfig
170 menu "Security support"
173 bool "Support the AES algorithm"
175 This provides a means to encrypt and decrypt data using the AES
176 (Advanced Encryption Standard). This algorithm uses a symetric key
177 and is widely used as a streaming cipher. Different key lengths are
178 supported by the algorithm but only a 128-bit key is supported at
181 source lib/rsa/Kconfig
184 bool "Trusted Platform Module (TPM) Support"
187 This enables support for TPMs which can be used to provide security
188 features for your board. The TPM can be connected via LPC or I2C
189 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
190 command to interactive the TPM. Driver model support is provided
191 for the low-level TPM interface, but only one TPM is supported at
192 a time by the TPM library.
195 bool "Trusted Platform Module (TPM) Support in SPL"
198 This enables support for TPMs which can be used to provide security
199 features for your board. The TPM can be connected via LPC or I2C
200 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
201 command to interactive the TPM. Driver model support is provided
202 for the low-level TPM interface, but only one TPM is supported at
203 a time by the TPM library.
206 bool "Trusted Platform Module (TPM) Support in TPL"
209 This enables support for TPMs which can be used to provide security
210 features for your board. The TPM can be connected via LPC or I2C
211 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
212 command to interactive the TPM. Driver model support is provided
213 for the low-level TPM interface, but only one TPM is supported at
214 a time by the TPM library.
218 menu "Android Verified Boot"
221 bool "Android Verified Boot 2.0 support"
222 depends on ANDROID_BOOT_IMAGE
225 This enables support of Android Verified Boot 2.0 which can be used
226 to assure the end user of the integrity of the software running on a
227 device. Introduces such features as boot chain of trust, rollback
232 menu "Hashing Support"
235 bool "Enable SHA1 support"
237 This option enables support of hashing using SHA1 algorithm.
238 The hash is calculated in software.
239 The SHA1 algorithm produces a 160-bit (20-byte) hash value
243 bool "Enable SHA256 support"
245 This option enables support of hashing using SHA256 algorithm.
246 The hash is calculated in software.
247 The SHA256 algorithm produces a 256-bit (32-byte) hash value
251 bool "Enable hashing using hardware"
253 This option enables hardware acceleration
254 for SHA1/SHA256 hashing.
255 This affects the 'hash' command and also the
256 hash_lookup_algo() function.
258 config SHA_PROG_HW_ACCEL
259 bool "Enable Progressive hashing support using hardware"
260 depends on SHA_HW_ACCEL
262 This option enables hardware-acceleration for
263 SHA1/SHA256 progressive hashing.
264 Data can be streamed in a block at a time and the hashing
265 is performed in hardware.
275 menu "Compression Support"
278 bool "Enable LZ4 decompression support"
280 If this option is set, support for LZ4 compressed images
281 is included. The LZ4 algorithm can run in-place as long as the
282 compressed image is loaded to the end of the output buffer, and
283 trades lower compression ratios for much faster decompression.
285 NOTE: This implements the release version of the LZ4 frame
286 format as generated by default by the 'lz4' command line tool.
287 This is not the same as the outdated, less efficient legacy
288 frame format currently (2015) implemented in the Linux kernel
289 (generated by 'lz4 -l'). The two formats are incompatible.
292 bool "Enable LZMA decompression support"
294 This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
295 a dictionary compression algorithm that provides a high compression
296 ratio and fairly fast decompression speed. See also
297 CONFIG_CMD_LZMADEC which provides a decode command.
300 bool "Enable LZO decompression support"
302 This enables support for LZO compression algorithm.r
305 bool "Enable gzip decompression support for SPL build"
309 This enables support for GZIP compression algorithm.
315 This enables ZLIB compression lib.
318 bool "Enable LZ4 decompression support in SPL"
320 This enables support for tge LZ4 decompression algorithm in SPL. LZ4
321 is a lossless data compression algorithm that is focused on
322 fast compression and decompression speed. It belongs to the LZ77
323 family of byte-oriented compression schemes.
326 bool "Enable LZO decompression support in SPL"
328 This enables support for LZO compression algorithm in the SPL.
331 bool "Enable gzip decompression support for SPL build"
334 This enables support for GZIP compression altorithm for SPL boot.
339 This enables compression lib for SPL boot.
344 bool "Enable function for getting errno-related string message"
346 The function errno_str(int errno), returns a pointer to the errno
347 corresponding text message:
348 - if errno is null or positive number - a pointer to "Success" message
349 - if errno is negative - a pointer to errno related message
352 bool "Enable hexdump"
354 This enables functions for printing dumps of binary data.
357 bool "Enable the FDT library"
358 default y if OF_CONTROL
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.
366 config OF_LIBFDT_OVERLAY
367 bool "Enable the FDT library overlay support"
369 default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE
371 This enables the FDT library (libfdt) overlay support.
374 bool "Enable the FDT library for SPL"
375 default y if SPL_OF_CONTROL
377 This enables the FDT library (libfdt). It provides functions for
378 accessing binary device tree images in memory, such as adding and
379 removing nodes and properties, scanning through the tree and finding
380 particular compatible nodes. The library operates on a flattened
381 version of the device tree.
384 bool "Enable the FDT library for TPL"
385 default y if TPL_OF_CONTROL
387 This enables the FDT library (libfdt). It provides functions for
388 accessing binary device tree images in memory, such as adding and
389 removing nodes and properties, scanning through the tree and finding
390 particular compatible nodes. The library operates on a flattened
391 version of the device tree.
393 config FDT_FIXUP_PARTITIONS
394 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
396 depends on CMD_MTDPARTS
398 Allow overwriting defined partitions in the device tree blob
399 using partition info defined in the 'mtdparts' environment
403 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
405 config GENERATE_SMBIOS_TABLE
406 bool "Generate an SMBIOS (System Management BIOS) table"
408 depends on X86 || EFI_LOADER
410 The System Management BIOS (SMBIOS) specification addresses how
411 motherboard and system vendors present management information about
412 their products in a standard format by extending the BIOS interface
413 on Intel architecture systems.
415 Check http://www.dmtf.org/standards/smbios for details.
417 config SMBIOS_MANUFACTURER
418 string "SMBIOS Manufacturer"
419 depends on GENERATE_SMBIOS_TABLE
422 The board manufacturer to store in SMBIOS structures.
423 Change this to override the default one (CONFIG_SYS_VENDOR).
425 config SMBIOS_PRODUCT_NAME
426 string "SMBIOS Product Name"
427 depends on GENERATE_SMBIOS_TABLE
430 The product name to store in SMBIOS structures.
431 Change this to override the default one (CONFIG_SYS_BOARD).
435 source lib/efi/Kconfig
436 source lib/efi_loader/Kconfig
437 source lib/optee/Kconfig