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
109 config IMAGE_SPARSE_FILLBUF_SIZE
110 hex "Android sparse image CHUNK_TYPE_FILL buffer size"
112 depends on IMAGE_SPARSE
114 Set the size of the fill buffer used when processing CHUNK_TYPE_FILL
117 config USE_PRIVATE_LIBGCC
118 bool "Use private libgcc"
119 depends on HAVE_PRIVATE_LIBGCC
120 default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
122 This option allows you to use the built-in libgcc implementation
123 of U-Boot instead of the one provided by the compiler.
130 The frequency of the timer returned by get_timer().
131 get_timer() must operate in milliseconds and this option must be
134 config SPL_USE_TINY_PRINTF
135 bool "Enable tiny printf() version in SPL"
139 This option enables a tiny, stripped down printf version.
140 This should only be used in space limited environments,
141 like SPL versions with hard memory limits. This version
142 reduces the code size by about 2.5KiB on armv7.
144 The supported format specifiers are %c, %s, %u/%d and %x.
146 config TPL_USE_TINY_PRINTF
147 bool "Enable tiny printf() version in TPL"
149 default y if SPL_USE_TINY_PRINTF
151 This option enables a tiny, stripped down printf version.
152 This should only be used in space limited environments,
153 like SPL versions with hard memory limits. This version
154 reduces the code size by about 2.5KiB on armv7.
156 The supported format specifiers are %c, %s, %u/%d and %x.
159 bool "Do not reset the system on fatal error"
161 Define this option to stop the system in case of a fatal error,
162 so that you have to reset it manually. This is probably NOT a good
163 idea for an embedded system where you want the system to reboot
164 automatically as fast as possible, but it may be useful during
165 development since you can try to debug the conditions that lead to
169 bool "Enable regular expression support"
172 If this variable is defined, U-Boot is linked against the
173 SLRE (Super Light Regular Expression) library, which adds
174 regex support to some commands, for example "env grep" and
178 prompt "Pseudo-random library support type"
179 depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID || \
180 RNG_SANDBOX || UT_LIB && AES || FAT_WRITE
183 Select the library to provide pseudo-random number generator
184 functions. LIB_HW_RAND supports certain hardware engines that
185 provide this functionality. If in doubt, select LIB_RAND.
188 bool "Pseudo-random library support"
191 bool "HW Engine for random library support"
195 config SPL_TINY_MEMSET
196 bool "Use a very small memset() in SPL"
198 The faster memset() is the arch-specific one (if available) enabled
199 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
200 better performance by writing a word at a time. But in very
201 size-constrained environments even this may be too big. Enable this
202 option to reduce code size slightly at the cost of some speed.
204 config TPL_TINY_MEMSET
205 bool "Use a very small memset() in TPL"
207 The faster memset() is the arch-specific one (if available) enabled
208 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
209 better performance by writing a word at a time. But in very
210 size-constrained environments even this may be too big. Enable this
211 option to reduce code size slightly at the cost of some speed.
217 bool "Bit reverse library from Linux"
220 bool "Support for tracing of function calls and timing"
224 Enables function tracing within U-Boot. This allows recording of call
225 traces including timing information. The command can write data to
226 memory for exporting for analysis (e.g. using bootchart).
227 See doc/README.trace for full details.
229 config TRACE_BUFFER_SIZE
230 hex "Size of trace buffer in U-Boot"
234 Sets the size of the trace buffer in U-Boot. This is allocated from
235 memory during relocation. If this buffer is too small, the trace
236 history will be truncated, with later records omitted.
238 If early trace is enabled (i.e. before relocation), this buffer must
239 be large enough to include all the data from the early trace buffer as
240 well, since this is copied over to the main buffer during relocation.
242 A trace record is emitted for each function call and each record is
243 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If
244 the size is too small then 'trace stats' will show a message saying
245 how many records were dropped due to buffer overflow.
247 config TRACE_CALL_DEPTH_LIMIT
248 int "Trace call depth limit"
252 Sets the maximum call depth up to which function calls are recorded.
255 bool "Enable tracing before relocation"
258 Sometimes it is helpful to trace execution of U-Boot before
259 relocation. This is possible by using a arch-specific, fixed buffer
260 position in memory. Enable this option to start tracing as early as
261 possible after U-Boot starts.
263 config TRACE_EARLY_SIZE
264 hex "Size of early trace buffer in U-Boot"
265 depends on TRACE_EARLY
268 Sets the size of the early trace buffer in bytes. This is used to hold
269 tracing information before relocation.
271 config TRACE_EARLY_CALL_DEPTH_LIMIT
272 int "Early trace call depth limit"
273 depends on TRACE_EARLY
276 Sets the maximum call depth up to which function calls are recorded
277 during early tracing.
279 config TRACE_EARLY_ADDR
280 hex "Address of early trace buffer in U-Boot"
281 depends on TRACE_EARLY
284 Sets the address of the early trace buffer in U-Boot. This memory
285 must be accessible before relocation.
287 A trace record is emitted for each function call and each record is
288 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If
289 the size is too small then the message which says the amount of early
290 data being coped will the the same as the
292 source lib/dhry/Kconfig
294 menu "Security support"
297 bool "Support the AES algorithm"
299 This provides a means to encrypt and decrypt data using the AES
300 (Advanced Encryption Standard). This algorithm uses a symetric key
301 and is widely used as a streaming cipher. Different key lengths are
302 supported by the algorithm but only a 128-bit key is supported at
305 source lib/ecdsa/Kconfig
306 source lib/rsa/Kconfig
307 source lib/crypto/Kconfig
308 source lib/crypt/Kconfig
311 bool "Trusted Platform Module (TPM) Support"
314 This enables support for TPMs which can be used to provide security
315 features for your board. The TPM can be connected via LPC or I2C
316 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
317 command to interactive the TPM. Driver model support is provided
318 for the low-level TPM interface, but only one TPM is supported at
319 a time by the TPM library.
322 bool "Trusted Platform Module (TPM) Support in SPL"
325 This enables support for TPMs which can be used to provide security
326 features for your board. The TPM can be connected via LPC or I2C
327 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
328 command to interactive the TPM. Driver model support is provided
329 for the low-level TPM interface, but only one TPM is supported at
330 a time by the TPM library.
333 bool "Trusted Platform Module (TPM) Support in TPL"
336 This enables support for TPMs which can be used to provide security
337 features for your board. The TPM can be connected via LPC or I2C
338 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
339 command to interactive the TPM. Driver model support is provided
340 for the low-level TPM interface, but only one TPM is supported at
341 a time by the TPM library.
345 menu "Android Verified Boot"
348 bool "Android Verified Boot 2.0 support"
349 depends on ANDROID_BOOT_IMAGE
351 This enables support of Android Verified Boot 2.0 which can be used
352 to assure the end user of the integrity of the software running on a
353 device. Introduces such features as boot chain of trust, rollback
358 menu "Hashing Support"
361 bool "Enable SHA1 support"
363 This option enables support of hashing using SHA1 algorithm.
364 The hash is calculated in software.
365 The SHA1 algorithm produces a 160-bit (20-byte) hash value
369 bool "Enable SHA256 support"
371 This option enables support of hashing using SHA256 algorithm.
372 The hash is calculated in software.
373 The SHA256 algorithm produces a 256-bit (32-byte) hash value
377 bool "Enable SHA512 support"
379 This option enables support of hashing using SHA512 algorithm.
380 The hash is calculated in software.
381 The SHA512 algorithm produces a 512-bit (64-byte) hash value
385 bool "Enable SHA384 support"
388 This option enables support of hashing using SHA384 algorithm.
389 The hash is calculated in software. This is also selects SHA512,
390 because these implementations share the bulk of the code..
391 The SHA384 algorithm produces a 384-bit (48-byte) hash value
395 bool "Enable hardware acceleration for SHA hash functions"
397 This option enables hardware acceleration for the SHA1 and SHA256
398 hashing algorithms. This affects the 'hash' command and also the
399 hash_lookup_algo() function.
404 bool "Enable SHA1 support in SPL"
407 This option enables support of hashing using SHA1 algorithm.
408 The hash is calculated in software.
409 The SHA1 algorithm produces a 160-bit (20-byte) hash value
413 bool "Enable SHA256 support in SPL"
416 This option enables support of hashing using SHA256 algorithm.
417 The hash is calculated in software.
418 The SHA256 algorithm produces a 256-bit (32-byte) hash value
422 bool "Enable SHA512 support in SPL"
425 This option enables support of hashing using SHA512 algorithm.
426 The hash is calculated in software.
427 The SHA512 algorithm produces a 512-bit (64-byte) hash value
431 bool "Enable SHA384 support in SPL"
435 This option enables support of hashing using SHA384 algorithm.
436 The hash is calculated in software. This is also selects SHA512,
437 because these implementations share the bulk of the code..
438 The SHA384 algorithm produces a 384-bit (48-byte) hash value
445 config SHA512_HW_ACCEL
446 bool "Enable hardware acceleration for SHA512"
449 This option enables hardware acceleration for the SHA384 and SHA512
450 hashing algorithms. This affects the 'hash' command and also the
451 hash_lookup_algo() function.
453 config SHA_PROG_HW_ACCEL
454 bool "Enable Progressive hashing support using hardware"
456 This option enables hardware-acceleration for SHA progressive
458 Data can be streamed in a block at a time and the hashing is
459 performed in hardware.
464 bool "Support MD5 algorithm"
466 This option enables MD5 support. MD5 is an algorithm designed
467 in 1991 that produces a 16-byte digest (or checksum) from its input
468 data. It has a number of vulnerabilities which preclude its use in
469 security applications, but it can be useful for providing a quick
470 checksum of a block of data.
473 bool "Support MD5 algorithm in SPL"
475 This option enables MD5 support in SPL. MD5 is an algorithm designed
476 in 1991 that produces a 16-byte digest (or checksum) from its input
477 data. It has a number of vulnerabilities which preclude its use in
478 security applications, but it can be useful for providing a quick
479 checksum of a block of data.
489 menu "Compression Support"
492 bool "Enable LZ4 decompression support"
494 If this option is set, support for LZ4 compressed images
495 is included. The LZ4 algorithm can run in-place as long as the
496 compressed image is loaded to the end of the output buffer, and
497 trades lower compression ratios for much faster decompression.
499 NOTE: This implements the release version of the LZ4 frame
500 format as generated by default by the 'lz4' command line tool.
501 This is not the same as the outdated, less efficient legacy
502 frame format currently (2015) implemented in the Linux kernel
503 (generated by 'lz4 -l'). The two formats are incompatible.
506 bool "Enable LZMA decompression support"
508 This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
509 a dictionary compression algorithm that provides a high compression
510 ratio and fairly fast decompression speed. See also
511 CONFIG_CMD_LZMADEC which provides a decode command.
514 bool "Enable LZO decompression support"
516 This enables support for the LZO compression algorithm.
519 bool "Enable gzip decompression support"
523 This enables support for GZIP compression algorithm.
525 config ZLIB_UNCOMPRESS
526 bool "Enables zlib's uncompress() functionality"
528 This enables an extra zlib functionality: the uncompress() function,
529 which decompresses data from a buffer into another, knowing their
530 sizes. Unlike gunzip(), there is no header parsing.
532 config GZIP_COMPRESSED
537 bool "Enable bzip2 decompression support"
539 This enables support for BZIP2 compression algorithm.
545 This enables ZLIB compression lib.
548 bool "Enable Zstandard decompression support"
551 This enables Zstandard decompression library.
554 bool "Enable LZ4 decompression support in SPL"
556 This enables support for the LZ4 decompression algorithm in SPL. LZ4
557 is a lossless data compression algorithm that is focused on
558 fast compression and decompression speed. It belongs to the LZ77
559 family of byte-oriented compression schemes.
562 bool "Enable LZMA decompression support for SPL build"
564 This enables support for LZMA compression algorithm for SPL boot.
567 bool "Enable LZO decompression support in SPL"
569 This enables support for LZO compression algorithm in the SPL.
572 bool "Enable gzip decompression support for SPL build"
575 This enables support for the GZIP compression algorithm for SPL boot.
580 This enables compression lib for SPL boot.
583 bool "Enable Zstandard decompression support in SPL"
586 This enables Zstandard decompression library in the SPL.
591 bool "Enable function for getting errno-related string message"
593 The function errno_str(int errno), returns a pointer to the errno
594 corresponding text message:
595 - if errno is null or positive number - a pointer to "Success" message
596 - if errno is negative - a pointer to errno related message
599 bool "Enable hexdump"
601 This enables functions for printing dumps of binary data.
604 bool "Enable hexdump in SPL"
605 depends on SPL && HEXDUMP
607 This enables functions for printing dumps of binary data in
613 This enables functions for parsing command-line options.
616 bool "Enable the FDT library"
617 default y if OF_CONTROL
619 This enables the FDT library (libfdt). It provides functions for
620 accessing binary device tree images in memory, such as adding and
621 removing nodes and properties, scanning through the tree and finding
622 particular compatible nodes. The library operates on a flattened
623 version of the device tree.
625 config OF_LIBFDT_ASSUME_MASK
626 hex "Mask of conditions to assume for libfdt"
627 depends on OF_LIBFDT || FIT
630 Use this to change the assumptions made by libfdt about the
631 device tree it is working with. A value of 0 means that no assumptions
632 are made, and libfdt is able to deal with malicious data. A value of
633 0xff means all assumptions are made and any invalid data may cause
634 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
636 config OF_LIBFDT_OVERLAY
637 bool "Enable the FDT library overlay support"
639 default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE
641 This enables the FDT library (libfdt) overlay support.
644 bool "Enable the FDT library for SPL"
645 default y if SPL_OF_CONTROL
647 This enables the FDT library (libfdt). It provides functions for
648 accessing binary device tree images in memory, such as adding and
649 removing nodes and properties, scanning through the tree and finding
650 particular compatible nodes. The library operates on a flattened
651 version of the device tree.
653 config SPL_OF_LIBFDT_ASSUME_MASK
654 hex "Mask of conditions to assume for libfdt"
655 depends on SPL_OF_LIBFDT || FIT
658 Use this to change the assumptions made by libfdt in SPL about the
659 device tree it is working with. A value of 0 means that no assumptions
660 are made, and libfdt is able to deal with malicious data. A value of
661 0xff means all assumptions are made and any invalid data may cause
662 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
665 bool "Enable the FDT library for TPL"
666 default y if TPL_OF_CONTROL
668 This enables the FDT library (libfdt). It provides functions for
669 accessing binary device tree images in memory, such as adding and
670 removing nodes and properties, scanning through the tree and finding
671 particular compatible nodes. The library operates on a flattened
672 version of the device tree.
674 config TPL_OF_LIBFDT_ASSUME_MASK
675 hex "Mask of conditions to assume for libfdt"
676 depends on TPL_OF_LIBFDT || FIT
679 Use this to change the assumptions made by libfdt in TPL about the
680 device tree it is working with. A value of 0 means that no assumptions
681 are made, and libfdt is able to deal with malicious data. A value of
682 0xff means all assumptions are made and any invalid data may cause
683 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
685 config FDT_FIXUP_PARTITIONS
686 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
688 depends on CMD_MTDPARTS
690 Allow overwriting defined partitions in the device tree blob
691 using partition info defined in the 'mtdparts' environment
695 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
697 config BLOBLIST_TABLES
698 bool "Put tables in a bloblist"
699 depends on X86 && BLOBLIST
701 Normally tables are placed at address 0xf0000 and can be up to 64KB
702 long. With this option, tables are instead placed in the bloblist
703 with a pointer from 0xf0000. The size can then be larger and the
704 tables can be placed high in memory.
706 config GENERATE_SMBIOS_TABLE
707 bool "Generate an SMBIOS (System Management BIOS) table"
709 depends on X86 || EFI_LOADER
711 The System Management BIOS (SMBIOS) specification addresses how
712 motherboard and system vendors present management information about
713 their products in a standard format by extending the BIOS interface
714 on Intel architecture systems.
716 Check http://www.dmtf.org/standards/smbios for details.
718 See also SMBIOS_SYSINFO which allows SMBIOS values to be provided in
722 bool "enable continued fraction calculation routines"
724 config SPL_LIB_RATIONAL
725 bool "enable continued fraction calculation routines for SPL"
736 Enable asn1 decoder library.
741 Enable fast lookup object identifier registry.
746 A simple parser for SMBIOS data.
748 source lib/efi/Kconfig
749 source lib/efi_loader/Kconfig
750 source lib/optee/Kconfig
753 bool "enable fdtdec test"
762 Support basic elf loading/validating functions.
763 This supports for 32 bit and 64 bit versions.
766 bool "Enable the logical memory blocks library (lmb)"
767 default y if ARC || ARM || M68K || MICROBLAZE || MIPS || NDS32 || \
768 NIOS2 || PPC || RISCV || SANDBOX || SH || X86 || XTENSA
770 Support the library logical memory blocks.
772 config LMB_USE_MAX_REGIONS
773 bool "Use a commun number of memory and reserved regions in lmb lib"
777 Define the number of supported memory regions in the library logical
779 This feature allow to reduce the lmb library size by using compiler
780 optimization when LMB_MEMORY_REGIONS == LMB_RESERVED_REGIONS.
782 config LMB_MAX_REGIONS
783 int "Number of memory and reserved regions in lmb lib"
784 depends on LMB && LMB_USE_MAX_REGIONS
787 Define the number of supported regions, memory and reserved, in the
788 library logical memory blocks.
790 config LMB_MEMORY_REGIONS
791 int "Number of memory regions in lmb lib"
792 depends on LMB && !LMB_USE_MAX_REGIONS
795 Define the number of supported memory regions in the library logical
797 The minimal value is CONFIG_NR_DRAM_BANKS.
799 config LMB_RESERVED_REGIONS
800 int "Number of reserved regions in lmb lib"
801 depends on LMB && !LMB_USE_MAX_REGIONS
804 Define the number of supported reserved regions in the library logical
809 config PHANDLE_CHECK_SEQ
810 bool "Enable phandle check while getting sequence number"
812 When there are multiple device tree nodes with same name,
813 enable this config option to distinguish them using
814 phandles in fdtdec_get_alias_seq() function.