1 menu "Library routines"
4 bool "Enable support for non-identity virtual-physical mappings"
6 Enables helper code for implementing non-identity virtual-physical
7 memory mappings for 32bit CPUs.
9 This library only works in the post-relocation phase.
11 config SYS_NUM_ADDR_MAP
12 int "Size of the address-map table"
16 Sets the number of entries in the virtual-physical mapping table.
19 bool "Enable Software based BCH ECC"
21 Enables software based BCH ECC algorithm present in lib/bch.c
22 This is used by SoC platforms which do not have built-in ELM
23 hardware engine required for BCH ECC correction.
26 bool "Allow access to binman information in the device tree"
27 depends on BINMAN && DM && OF_CONTROL
28 default y if OF_SEPARATE || OF_EMBED
30 This enables U-Boot to access information about binman entries,
31 stored in the device tree in a binman node. Typical uses are to
32 locate entries in the firmware image. See binman.h for the available
35 config CC_OPTIMIZE_LIBS_FOR_SPEED
36 bool "Optimize libraries for speed"
38 Enabling this option will pass "-O2" to gcc when compiling
39 under "lib" directory.
45 default y if UT_UNICODE || EFI_LOADER || UFS
47 Enables support for various conversions between different
48 character sets, such as between unicode representations and
49 different 'code pages'.
51 config DYNAMIC_CRC_TABLE
52 bool "Enable Dynamic tables for CRC"
54 Enable this option to calculate entries for CRC tables at runtime.
55 This can be helpful when reducing the size of the build image
57 config HAVE_ARCH_IOMAP
60 Enable this option if architecture provides io{read,write}{8,16,32}
61 I/O accessor functions.
63 config HAVE_PRIVATE_LIBGCC
76 select SPL_STRTO if !SPL_USE_TINY_PRINTF
81 select TPL_STRTO if !TPL_USE_TINY_PRINTF
110 config IMAGE_SPARSE_FILLBUF_SIZE
111 hex "Android sparse image CHUNK_TYPE_FILL buffer size"
113 depends on IMAGE_SPARSE
115 Set the size of the fill buffer used when processing CHUNK_TYPE_FILL
118 config USE_PRIVATE_LIBGCC
119 bool "Use private libgcc"
120 depends on HAVE_PRIVATE_LIBGCC
121 default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
123 This option allows you to use the built-in libgcc implementation
124 of U-Boot instead of the one provided by the compiler.
131 The frequency of the timer returned by get_timer().
132 get_timer() must operate in milliseconds and this option must be
135 config SPL_USE_TINY_PRINTF
136 bool "Enable tiny printf() version in SPL"
140 This option enables a tiny, stripped down printf version.
141 This should only be used in space limited environments,
142 like SPL versions with hard memory limits. This version
143 reduces the code size by about 2.5KiB on armv7.
145 The supported format specifiers are %c, %s, %u/%d and %x.
147 config TPL_USE_TINY_PRINTF
148 bool "Enable tiny printf() version in TPL"
150 default y if SPL_USE_TINY_PRINTF
152 This option enables a tiny, stripped down printf version.
153 This should only be used in space limited environments,
154 like SPL versions with hard memory limits. This version
155 reduces the code size by about 2.5KiB on armv7.
157 The supported format specifiers are %c, %s, %u/%d and %x.
160 bool "Do not reset the system on fatal error"
162 Define this option to stop the system in case of a fatal error,
163 so that you have to reset it manually. This is probably NOT a good
164 idea for an embedded system where you want the system to reboot
165 automatically as fast as possible, but it may be useful during
166 development since you can try to debug the conditions that lead to
170 bool "Enable regular expression support"
173 If this variable is defined, U-Boot is linked against the
174 SLRE (Super Light Regular Expression) library, which adds
175 regex support to some commands, for example "env grep" and
179 prompt "Pseudo-random library support type"
180 depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID || \
181 RNG_SANDBOX || UT_LIB && AES || FAT_WRITE
184 Select the library to provide pseudo-random number generator
185 functions. LIB_HW_RAND supports certain hardware engines that
186 provide this functionality. If in doubt, select LIB_RAND.
189 bool "Pseudo-random library support"
192 bool "HW Engine for random library support"
196 config SPL_TINY_MEMSET
197 bool "Use a very small memset() in SPL"
199 The faster memset() is the arch-specific one (if available) enabled
200 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
201 better performance by writing a word at a time. But in very
202 size-constrained environments even this may be too big. Enable this
203 option to reduce code size slightly at the cost of some speed.
205 config TPL_TINY_MEMSET
206 bool "Use a very small memset() in TPL"
208 The faster memset() is the arch-specific one (if available) enabled
209 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
210 better performance by writing a word at a time. But in very
211 size-constrained environments even this may be too big. Enable this
212 option to reduce code size slightly at the cost of some speed.
218 bool "Bit reverse library from Linux"
221 bool "Support for tracing of function calls and timing"
225 Enables function tracing within U-Boot. This allows recording of call
226 traces including timing information. The command can write data to
227 memory for exporting for analysis (e.g. using bootchart).
228 See doc/README.trace for full details.
230 config TRACE_BUFFER_SIZE
231 hex "Size of trace buffer in U-Boot"
235 Sets the size of the trace buffer in U-Boot. This is allocated from
236 memory during relocation. If this buffer is too small, the trace
237 history will be truncated, with later records omitted.
239 If early trace is enabled (i.e. before relocation), this buffer must
240 be large enough to include all the data from the early trace buffer as
241 well, since this is copied over to the main buffer during relocation.
243 A trace record is emitted for each function call and each record is
244 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If
245 the size is too small then 'trace stats' will show a message saying
246 how many records were dropped due to buffer overflow.
248 config TRACE_CALL_DEPTH_LIMIT
249 int "Trace call depth limit"
253 Sets the maximum call depth up to which function calls are recorded.
256 bool "Enable tracing before relocation"
259 Sometimes it is helpful to trace execution of U-Boot before
260 relocation. This is possible by using a arch-specific, fixed buffer
261 position in memory. Enable this option to start tracing as early as
262 possible after U-Boot starts.
264 config TRACE_EARLY_SIZE
265 hex "Size of early trace buffer in U-Boot"
266 depends on TRACE_EARLY
269 Sets the size of the early trace buffer in bytes. This is used to hold
270 tracing information before relocation.
272 config TRACE_EARLY_CALL_DEPTH_LIMIT
273 int "Early trace call depth limit"
274 depends on TRACE_EARLY
277 Sets the maximum call depth up to which function calls are recorded
278 during early tracing.
280 config TRACE_EARLY_ADDR
281 hex "Address of early trace buffer in U-Boot"
282 depends on TRACE_EARLY
285 Sets the address of the early trace buffer in U-Boot. This memory
286 must be accessible before relocation.
288 A trace record is emitted for each function call and each record is
289 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If
290 the size is too small then the message which says the amount of early
291 data being coped will the the same as the
293 source lib/dhry/Kconfig
295 menu "Security support"
298 bool "Support the AES algorithm"
300 This provides a means to encrypt and decrypt data using the AES
301 (Advanced Encryption Standard). This algorithm uses a symetric key
302 and is widely used as a streaming cipher. Different key lengths are
303 supported by the algorithm but only a 128-bit key is supported at
306 source lib/ecdsa/Kconfig
307 source lib/rsa/Kconfig
308 source lib/crypto/Kconfig
309 source lib/crypt/Kconfig
312 bool "Trusted Platform Module (TPM) Support"
315 This enables support for TPMs which can be used to provide security
316 features for your board. The TPM can be connected via LPC or I2C
317 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
318 command to interactive the TPM. Driver model support is provided
319 for the low-level TPM interface, but only one TPM is supported at
320 a time by the TPM library.
323 bool "Trusted Platform Module (TPM) Support in SPL"
326 This enables support for TPMs which can be used to provide security
327 features for your board. The TPM can be connected via LPC or I2C
328 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
329 command to interactive the TPM. Driver model support is provided
330 for the low-level TPM interface, but only one TPM is supported at
331 a time by the TPM library.
334 bool "Trusted Platform Module (TPM) Support in TPL"
337 This enables support for TPMs which can be used to provide security
338 features for your board. The TPM can be connected via LPC or I2C
339 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
340 command to interactive the TPM. Driver model support is provided
341 for the low-level TPM interface, but only one TPM is supported at
342 a time by the TPM library.
346 menu "Android Verified Boot"
349 bool "Android Verified Boot 2.0 support"
350 depends on ANDROID_BOOT_IMAGE
353 This enables support of Android Verified Boot 2.0 which can be used
354 to assure the end user of the integrity of the software running on a
355 device. Introduces such features as boot chain of trust, rollback
360 menu "Hashing Support"
363 bool "Enable SHA1 support"
365 This option enables support of hashing using SHA1 algorithm.
366 The hash is calculated in software.
367 The SHA1 algorithm produces a 160-bit (20-byte) hash value
371 bool "Enable SHA256 support"
373 This option enables support of hashing using SHA256 algorithm.
374 The hash is calculated in software.
375 The SHA256 algorithm produces a 256-bit (32-byte) hash value
379 bool "Enable SHA512 algorithm"
381 This option enables support of internal SHA512 algorithm.
384 bool "Enable SHA512 support"
385 depends on SHA512_ALGO
387 This option enables support of hashing using SHA512 algorithm.
388 The hash is calculated in software.
389 The SHA512 algorithm produces a 512-bit (64-byte) hash value
393 bool "Enable SHA384 support"
394 depends on SHA512_ALGO
396 This option enables support of hashing using SHA384 algorithm.
397 The hash is calculated in software.
398 The SHA384 algorithm produces a 384-bit (48-byte) hash value
402 bool "Enable hardware acceleration for SHA hash functions"
404 This option enables hardware acceleration for the SHA1 and SHA256
405 hashing algorithms. This affects the 'hash' command and also the
406 hash_lookup_algo() function.
410 config SHA512_HW_ACCEL
411 bool "Enable hardware acceleration for SHA512"
412 depends on SHA512_ALGO
414 This option enables hardware acceleration for the SHA384 and SHA512
415 hashing algorithms. This affects the 'hash' command and also the
416 hash_lookup_algo() function.
418 config SHA_PROG_HW_ACCEL
419 bool "Enable Progressive hashing support using hardware"
421 This option enables hardware-acceleration for SHA progressive
423 Data can be streamed in a block at a time and the hashing is
424 performed in hardware.
429 bool "Support MD5 algorithm"
431 This option enables MD5 support. MD5 is an algorithm designed
432 in 1991 that produces a 16-byte digest (or checksum) from its input
433 data. It has a number of vulnerabilities which preclude its use in
434 security applications, but it can be useful for providing a quick
435 checksum of a block of data.
438 bool "Support MD5 algorithm in SPL"
440 This option enables MD5 support in SPL. MD5 is an algorithm designed
441 in 1991 that produces a 16-byte digest (or checksum) from its input
442 data. It has a number of vulnerabilities which preclude its use in
443 security applications, but it can be useful for providing a quick
444 checksum of a block of data.
454 menu "Compression Support"
457 bool "Enable LZ4 decompression support"
459 If this option is set, support for LZ4 compressed images
460 is included. The LZ4 algorithm can run in-place as long as the
461 compressed image is loaded to the end of the output buffer, and
462 trades lower compression ratios for much faster decompression.
464 NOTE: This implements the release version of the LZ4 frame
465 format as generated by default by the 'lz4' command line tool.
466 This is not the same as the outdated, less efficient legacy
467 frame format currently (2015) implemented in the Linux kernel
468 (generated by 'lz4 -l'). The two formats are incompatible.
471 bool "Enable LZMA decompression support"
473 This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
474 a dictionary compression algorithm that provides a high compression
475 ratio and fairly fast decompression speed. See also
476 CONFIG_CMD_LZMADEC which provides a decode command.
479 bool "Enable LZO decompression support"
481 This enables support for LZO compression algorithm.r
484 bool "Enable gzip decompression support"
488 This enables support for GZIP compression algorithm.
490 config ZLIB_UNCOMPRESS
491 bool "Enables zlib's uncompress() functionality"
493 This enables an extra zlib functionality: the uncompress() function,
494 which decompresses data from a buffer into another, knowing their
495 sizes. Unlike gunzip(), there is no header parsing.
497 config GZIP_COMPRESSED
502 bool "Enable bzip2 decompression support"
504 This enables support for BZIP2 compression algorithm.
510 This enables ZLIB compression lib.
513 bool "Enable Zstandard decompression support"
516 This enables Zstandard decompression library.
519 bool "Enable LZ4 decompression support in SPL"
521 This enables support for the LZ4 decompression algorithm in SPL. LZ4
522 is a lossless data compression algorithm that is focused on
523 fast compression and decompression speed. It belongs to the LZ77
524 family of byte-oriented compression schemes.
527 bool "Enable LZMA decompression support for SPL build"
529 This enables support for LZMA compression algorithm for SPL boot.
532 bool "Enable LZO decompression support in SPL"
534 This enables support for LZO compression algorithm in the SPL.
537 bool "Enable gzip decompression support for SPL build"
540 This enables support for GZIP compression altorithm for SPL boot.
545 This enables compression lib for SPL boot.
548 bool "Enable Zstandard decompression support in SPL"
551 This enables Zstandard decompression library in the SPL.
556 bool "Enable function for getting errno-related string message"
558 The function errno_str(int errno), returns a pointer to the errno
559 corresponding text message:
560 - if errno is null or positive number - a pointer to "Success" message
561 - if errno is negative - a pointer to errno related message
564 bool "Enable hexdump"
566 This enables functions for printing dumps of binary data.
569 bool "Enable hexdump in SPL"
570 depends on SPL && HEXDUMP
572 This enables functions for printing dumps of binary data in
578 This enables functions for parsing command-line options.
581 bool "Enable the FDT library"
582 default y if OF_CONTROL
584 This enables the FDT library (libfdt). It provides functions for
585 accessing binary device tree images in memory, such as adding and
586 removing nodes and properties, scanning through the tree and finding
587 particular compatible nodes. The library operates on a flattened
588 version of the device tree.
590 config OF_LIBFDT_ASSUME_MASK
591 hex "Mask of conditions to assume for libfdt"
592 depends on OF_LIBFDT || FIT
595 Use this to change the assumptions made by libfdt about the
596 device tree it is working with. A value of 0 means that no assumptions
597 are made, and libfdt is able to deal with malicious data. A value of
598 0xff means all assumptions are made and any invalid data may cause
599 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
601 config OF_LIBFDT_OVERLAY
602 bool "Enable the FDT library overlay support"
604 default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE
606 This enables the FDT library (libfdt) overlay support.
609 bool "Enable the FDT library for SPL"
610 default y if SPL_OF_CONTROL
612 This enables the FDT library (libfdt). It provides functions for
613 accessing binary device tree images in memory, such as adding and
614 removing nodes and properties, scanning through the tree and finding
615 particular compatible nodes. The library operates on a flattened
616 version of the device tree.
618 config SPL_OF_LIBFDT_ASSUME_MASK
619 hex "Mask of conditions to assume for libfdt"
620 depends on SPL_OF_LIBFDT || FIT
623 Use this to change the assumptions made by libfdt in SPL about the
624 device tree it is working with. A value of 0 means that no assumptions
625 are made, and libfdt is able to deal with malicious data. A value of
626 0xff means all assumptions are made and any invalid data may cause
627 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
630 bool "Enable the FDT library for TPL"
631 default y if TPL_OF_CONTROL
633 This enables the FDT library (libfdt). It provides functions for
634 accessing binary device tree images in memory, such as adding and
635 removing nodes and properties, scanning through the tree and finding
636 particular compatible nodes. The library operates on a flattened
637 version of the device tree.
639 config TPL_OF_LIBFDT_ASSUME_MASK
640 hex "Mask of conditions to assume for libfdt"
641 depends on TPL_OF_LIBFDT || FIT
644 Use this to change the assumptions made by libfdt in TPL about the
645 device tree it is working with. A value of 0 means that no assumptions
646 are made, and libfdt is able to deal with malicious data. A value of
647 0xff means all assumptions are made and any invalid data may cause
648 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
650 config FDT_FIXUP_PARTITIONS
651 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
653 depends on CMD_MTDPARTS
655 Allow overwriting defined partitions in the device tree blob
656 using partition info defined in the 'mtdparts' environment
660 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
662 config BLOBLIST_TABLES
663 bool "Put tables in a bloblist"
664 depends on X86 && BLOBLIST
666 Normally tables are placed at address 0xf0000 and can be up to 64KB
667 long. With this option, tables are instead placed in the bloblist
668 with a pointer from 0xf0000. The size can then be larger and the
669 tables can be placed high in memory.
671 config GENERATE_SMBIOS_TABLE
672 bool "Generate an SMBIOS (System Management BIOS) table"
674 depends on X86 || EFI_LOADER
676 The System Management BIOS (SMBIOS) specification addresses how
677 motherboard and system vendors present management information about
678 their products in a standard format by extending the BIOS interface
679 on Intel architecture systems.
681 Check http://www.dmtf.org/standards/smbios for details.
683 See also SMBIOS_SYSINFO which allows SMBIOS values to be provided in
687 bool "enable continued fraction calculation routines"
689 config SPL_LIB_RATIONAL
690 bool "enable continued fraction calculation routines for SPL"
701 Enable asn1 decoder library.
706 Enable fast lookup object identifier registry.
711 A simple parser for SMBIOS data.
713 source lib/efi/Kconfig
714 source lib/efi_loader/Kconfig
715 source lib/optee/Kconfig
718 bool "enable fdtdec test"
727 Support basic elf loading/validating functions.
728 This supports for 32 bit and 64 bit versions.
731 bool "Enable the logical memory blocks library (lmb)"
732 default y if ARC || ARM || M68K || MICROBLAZE || MIPS || NDS32 || \
733 NIOS2 || PPC || RISCV || SANDBOX || SH || X86 || XTENSA
735 Support the library logical memory blocks.
737 config LMB_USE_MAX_REGIONS
738 bool "Use a commun number of memory and reserved regions in lmb lib"
742 Define the number of supported memory regions in the library logical
744 This feature allow to reduce the lmb library size by using compiler
745 optimization when LMB_MEMORY_REGIONS == LMB_RESERVED_REGIONS.
747 config LMB_MAX_REGIONS
748 int "Number of memory and reserved regions in lmb lib"
749 depends on LMB && LMB_USE_MAX_REGIONS
752 Define the number of supported regions, memory and reserved, in the
753 library logical memory blocks.
755 config LMB_MEMORY_REGIONS
756 int "Number of memory regions in lmb lib"
757 depends on LMB && !LMB_USE_MAX_REGIONS
760 Define the number of supported memory regions in the library logical
762 The minimal value is CONFIG_NR_DRAM_BANKS.
764 config LMB_RESERVED_REGIONS
765 int "Number of reserved regions in lmb lib"
766 depends on LMB && !LMB_USE_MAX_REGIONS
769 Define the number of supported reserved regions in the library logical
774 config PHANDLE_CHECK_SEQ
775 bool "Enable phandle check while getting sequence number"
778 When there are multiple device tree nodes with same name,
779 enable this config option to distinguish them using
780 phandles in fdtdec_get_alias_seq() function.