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 !SPL_USE_TINY_PRINTF
48 select TPL_STRTO if !TPL_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 SPL_USE_TINY_PRINTF
99 bool "Enable tiny printf() version in SPL"
103 This option enables a tiny, stripped down printf version.
104 This should only be used in space limited environments,
105 like SPL versions with hard memory limits. This version
106 reduces the code size by about 2.5KiB on armv7.
108 The supported format specifiers are %c, %s, %u/%d and %x.
110 config TPL_USE_TINY_PRINTF
111 bool "Enable tiny printf() version in TPL"
113 default y if SPL_USE_TINY_PRINTF
115 This option enables a tiny, stripped down printf version.
116 This should only be used in space limited environments,
117 like SPL versions with hard memory limits. This version
118 reduces the code size by about 2.5KiB on armv7.
120 The supported format specifiers are %c, %s, %u/%d and %x.
123 bool "Do not reset the system on fatal error"
125 Define this option to stop the system in case of a fatal error,
126 so that you have to reset it manually. This is probably NOT a good
127 idea for an embedded system where you want the system to reboot
128 automatically as fast as possible, but it may be useful during
129 development since you can try to debug the conditions that lead to
133 bool "Enable regular expression support"
136 If this variable is defined, U-Boot is linked against the
137 SLRE (Super Light Regular Expression) library, which adds
138 regex support to some commands, for example "env grep" and
142 prompt "Pseudo-random library support type"
143 depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID
146 Select the library to provide pseudo-random number generator
147 functions. LIB_HW_RAND supports certain hardware engines that
148 provide this functionality. If in doubt, select LIB_RAND.
151 bool "Pseudo-random library support"
154 bool "HW Engine for random libray support"
158 config SPL_TINY_MEMSET
159 bool "Use a very small memset() in SPL"
161 The faster memset() is the arch-specific one (if available) enabled
162 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
163 better performance by writing a word at a time. But in very
164 size-constrained environments even this may be too big. Enable this
165 option to reduce code size slightly at the cost of some speed.
167 config TPL_TINY_MEMSET
168 bool "Use a very small memset() in TPL"
170 The faster memset() is the arch-specific one (if available) enabled
171 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
172 better performance by writing a word at a time. But in very
173 size-constrained environments even this may be too big. Enable this
174 option to reduce code size slightly at the cost of some speed.
180 bool "Bit reverse library from Linux"
183 bool "Support for tracing of function calls and timing"
186 Enables function tracing within U-Boot. This allows recording of call
187 traces including timing information. The command can write data to
188 memory for exporting for analysis (e.g. using bootchart).
189 See doc/README.trace for full details.
191 config TRACE_BUFFER_SIZE
192 hex "Size of trace buffer in U-Boot"
196 Sets the size of the trace buffer in U-Boot. This is allocated from
197 memory during relocation. If this buffer is too small, the trace
198 history will be truncated, with later records omitted.
200 If early trace is enabled (i.e. before relocation), this buffer must
201 be large enough to include all the data from the early trace buffer as
202 well, since this is copied over to the main buffer during relocation.
204 A trace record is emitted for each function call and each record is
205 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If
206 the size is too small then 'trace stats' will show a message saying
207 how many records were dropped due to buffer overflow.
209 config TRACE_CALL_DEPTH_LIMIT
210 int "Trace call depth limit"
214 Sets the maximum call depth up to which function calls are recorded.
217 bool "Enable tracing before relocation"
220 Sometimes it is helpful to trace execution of U-Boot before
221 relocation. This is possible by using a arch-specific, fixed buffer
222 position in memory. Enable this option to start tracing as early as
223 possible after U-Boot starts.
225 config TRACE_EARLY_SIZE
226 hex "Size of early trace buffer in U-Boot"
227 depends on TRACE_EARLY
230 Sets the size of the early trace buffer in bytes. This is used to hold
231 tracing information before relocation.
233 config TRACE_EARLY_CALL_DEPTH_LIMIT
234 int "Early trace call depth limit"
235 depends on TRACE_EARLY
238 Sets the maximum call depth up to which function calls are recorded
239 during early tracing.
241 config TRACE_EARLY_ADDR
242 hex "Address of early trace buffer in U-Boot"
243 depends on TRACE_EARLY
246 Sets the address of the early trace buffer in U-Boot. This memory
247 must be accessible before relocation.
249 A trace record is emitted for each function call and each record is
250 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If
251 the size is too small then the message which says the amount of early
252 data being coped will the the same as the
254 source lib/dhry/Kconfig
256 menu "Security support"
259 bool "Support the AES algorithm"
261 This provides a means to encrypt and decrypt data using the AES
262 (Advanced Encryption Standard). This algorithm uses a symetric key
263 and is widely used as a streaming cipher. Different key lengths are
264 supported by the algorithm but only a 128-bit key is supported at
267 source lib/rsa/Kconfig
268 source lib/crypto/Kconfig
271 bool "Trusted Platform Module (TPM) Support"
274 This enables support for TPMs which can be used to provide security
275 features for your board. The TPM can be connected via LPC or I2C
276 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
277 command to interactive the TPM. Driver model support is provided
278 for the low-level TPM interface, but only one TPM is supported at
279 a time by the TPM library.
282 bool "Trusted Platform Module (TPM) Support in SPL"
285 This enables support for TPMs which can be used to provide security
286 features for your board. The TPM can be connected via LPC or I2C
287 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
288 command to interactive the TPM. Driver model support is provided
289 for the low-level TPM interface, but only one TPM is supported at
290 a time by the TPM library.
293 bool "Trusted Platform Module (TPM) Support in TPL"
296 This enables support for TPMs which can be used to provide security
297 features for your board. The TPM can be connected via LPC or I2C
298 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
299 command to interactive the TPM. Driver model support is provided
300 for the low-level TPM interface, but only one TPM is supported at
301 a time by the TPM library.
305 menu "Android Verified Boot"
308 bool "Android Verified Boot 2.0 support"
309 depends on ANDROID_BOOT_IMAGE
312 This enables support of Android Verified Boot 2.0 which can be used
313 to assure the end user of the integrity of the software running on a
314 device. Introduces such features as boot chain of trust, rollback
319 menu "Hashing Support"
322 bool "Enable SHA1 support"
324 This option enables support of hashing using SHA1 algorithm.
325 The hash is calculated in software.
326 The SHA1 algorithm produces a 160-bit (20-byte) hash value
330 bool "Enable SHA256 support"
332 This option enables support of hashing using SHA256 algorithm.
333 The hash is calculated in software.
334 The SHA256 algorithm produces a 256-bit (32-byte) hash value
338 bool "Enable hashing using hardware"
340 This option enables hardware acceleration
341 for SHA1/SHA256 hashing.
342 This affects the 'hash' command and also the
343 hash_lookup_algo() function.
345 config SHA_PROG_HW_ACCEL
346 bool "Enable Progressive hashing support using hardware"
347 depends on SHA_HW_ACCEL
349 This option enables hardware-acceleration for
350 SHA1/SHA256 progressive hashing.
351 Data can be streamed in a block at a time and the hashing
352 is performed in hardware.
365 menu "Compression Support"
368 bool "Enable LZ4 decompression support"
370 If this option is set, support for LZ4 compressed images
371 is included. The LZ4 algorithm can run in-place as long as the
372 compressed image is loaded to the end of the output buffer, and
373 trades lower compression ratios for much faster decompression.
375 NOTE: This implements the release version of the LZ4 frame
376 format as generated by default by the 'lz4' command line tool.
377 This is not the same as the outdated, less efficient legacy
378 frame format currently (2015) implemented in the Linux kernel
379 (generated by 'lz4 -l'). The two formats are incompatible.
382 bool "Enable LZMA decompression support"
384 This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
385 a dictionary compression algorithm that provides a high compression
386 ratio and fairly fast decompression speed. See also
387 CONFIG_CMD_LZMADEC which provides a decode command.
390 bool "Enable LZO decompression support"
392 This enables support for LZO compression algorithm.r
395 bool "Enable gzip decompression support"
399 This enables support for GZIP compression algorithm.
405 This enables ZLIB compression lib.
408 bool "Enable Zstandard decompression support"
411 This enables Zstandard decompression library.
414 bool "Enable LZ4 decompression support in SPL"
416 This enables support for tge LZ4 decompression algorithm in SPL. LZ4
417 is a lossless data compression algorithm that is focused on
418 fast compression and decompression speed. It belongs to the LZ77
419 family of byte-oriented compression schemes.
422 bool "Enable LZO decompression support in SPL"
424 This enables support for LZO compression algorithm in the SPL.
427 bool "Enable gzip decompression support for SPL build"
430 This enables support for GZIP compression altorithm for SPL boot.
435 This enables compression lib for SPL boot.
438 bool "Enable Zstandard decompression support in SPL"
441 This enables Zstandard decompression library in the SPL.
446 bool "Enable function for getting errno-related string message"
448 The function errno_str(int errno), returns a pointer to the errno
449 corresponding text message:
450 - if errno is null or positive number - a pointer to "Success" message
451 - if errno is negative - a pointer to errno related message
454 bool "Enable hexdump"
456 This enables functions for printing dumps of binary data.
459 bool "Enable the FDT library"
460 default y if OF_CONTROL
462 This enables the FDT library (libfdt). It provides functions for
463 accessing binary device tree images in memory, such as adding and
464 removing nodes and properties, scanning through the tree and finding
465 particular compatible nodes. The library operates on a flattened
466 version of the device tree.
468 config OF_LIBFDT_ASSUME_MASK
469 hex "Mask of conditions to assume for libfdt"
470 depends on OF_LIBFDT || FIT
473 Use this to change the assumptions made by libfdt about the
474 device tree it is working with. A value of 0 means that no assumptions
475 are made, and libfdt is able to deal with malicious data. A value of
476 0xff means all assumptions are made and any invalid data may cause
477 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
479 config OF_LIBFDT_OVERLAY
480 bool "Enable the FDT library overlay support"
482 default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE
484 This enables the FDT library (libfdt) overlay support.
487 bool "Enable the FDT library for SPL"
488 default y if SPL_OF_CONTROL
490 This enables the FDT library (libfdt). It provides functions for
491 accessing binary device tree images in memory, such as adding and
492 removing nodes and properties, scanning through the tree and finding
493 particular compatible nodes. The library operates on a flattened
494 version of the device tree.
496 config SPL_OF_LIBFDT_ASSUME_MASK
497 hex "Mask of conditions to assume for libfdt"
498 depends on SPL_OF_LIBFDT || FIT
501 Use this to change the assumptions made by libfdt in SPL about the
502 device tree it is working with. A value of 0 means that no assumptions
503 are made, and libfdt is able to deal with malicious data. A value of
504 0xff means all assumptions are made and any invalid data may cause
505 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
508 bool "Enable the FDT library for TPL"
509 default y if TPL_OF_CONTROL
511 This enables the FDT library (libfdt). It provides functions for
512 accessing binary device tree images in memory, such as adding and
513 removing nodes and properties, scanning through the tree and finding
514 particular compatible nodes. The library operates on a flattened
515 version of the device tree.
517 config TPL_OF_LIBFDT_ASSUME_MASK
518 hex "Mask of conditions to assume for libfdt"
519 depends on TPL_OF_LIBFDT || FIT
522 Use this to change the assumptions made by libfdt in TPL about the
523 device tree it is working with. A value of 0 means that no assumptions
524 are made, and libfdt is able to deal with malicious data. A value of
525 0xff means all assumptions are made and any invalid data may cause
526 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
528 config FDT_FIXUP_PARTITIONS
529 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
531 depends on CMD_MTDPARTS
533 Allow overwriting defined partitions in the device tree blob
534 using partition info defined in the 'mtdparts' environment
538 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
540 config GENERATE_SMBIOS_TABLE
541 bool "Generate an SMBIOS (System Management BIOS) table"
543 depends on X86 || EFI_LOADER
545 The System Management BIOS (SMBIOS) specification addresses how
546 motherboard and system vendors present management information about
547 their products in a standard format by extending the BIOS interface
548 on Intel architecture systems.
550 Check http://www.dmtf.org/standards/smbios for details.
552 config SMBIOS_MANUFACTURER
553 string "SMBIOS Manufacturer"
554 depends on GENERATE_SMBIOS_TABLE
557 The board manufacturer to store in SMBIOS structures.
558 Change this to override the default one (CONFIG_SYS_VENDOR).
560 config SMBIOS_PRODUCT_NAME
561 string "SMBIOS Product Name"
562 depends on GENERATE_SMBIOS_TABLE
565 The product name to store in SMBIOS structures.
566 Change this to override the default one (CONFIG_SYS_BOARD).
576 Enable asn1 decoder library.
581 Enable fast lookup object identifier registry.
583 source lib/efi/Kconfig
584 source lib/efi_loader/Kconfig
585 source lib/optee/Kconfig
588 bool "enable fdtdec test"