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
378 bool "Enable SHA512 support"
380 This option enables support of hashing using SHA512 algorithm.
381 The hash is calculated in software.
382 The SHA512 algorithm produces a 512-bit (64-byte) hash value
386 bool "Enable SHA384 support"
389 This option enables support of hashing using SHA384 algorithm.
390 The hash is calculated in software. This is also selects SHA512,
391 because these implementations share the bulk of the code..
392 The SHA384 algorithm produces a 384-bit (48-byte) hash value
396 bool "Enable hardware acceleration for SHA hash functions"
398 This option enables hardware acceleration for the SHA1 and SHA256
399 hashing algorithms. This affects the 'hash' command and also the
400 hash_lookup_algo() function.
404 config SHA512_HW_ACCEL
405 bool "Enable hardware acceleration for SHA512"
408 This option enables hardware acceleration for the SHA384 and SHA512
409 hashing algorithms. This affects the 'hash' command and also the
410 hash_lookup_algo() function.
412 config SHA_PROG_HW_ACCEL
413 bool "Enable Progressive hashing support using hardware"
415 This option enables hardware-acceleration for SHA progressive
417 Data can be streamed in a block at a time and the hashing is
418 performed in hardware.
423 bool "Support MD5 algorithm"
425 This option enables MD5 support. MD5 is an algorithm designed
426 in 1991 that produces a 16-byte digest (or checksum) from its input
427 data. It has a number of vulnerabilities which preclude its use in
428 security applications, but it can be useful for providing a quick
429 checksum of a block of data.
432 bool "Support MD5 algorithm in SPL"
434 This option enables MD5 support in SPL. MD5 is an algorithm designed
435 in 1991 that produces a 16-byte digest (or checksum) from its input
436 data. It has a number of vulnerabilities which preclude its use in
437 security applications, but it can be useful for providing a quick
438 checksum of a block of data.
448 menu "Compression Support"
451 bool "Enable LZ4 decompression support"
453 If this option is set, support for LZ4 compressed images
454 is included. The LZ4 algorithm can run in-place as long as the
455 compressed image is loaded to the end of the output buffer, and
456 trades lower compression ratios for much faster decompression.
458 NOTE: This implements the release version of the LZ4 frame
459 format as generated by default by the 'lz4' command line tool.
460 This is not the same as the outdated, less efficient legacy
461 frame format currently (2015) implemented in the Linux kernel
462 (generated by 'lz4 -l'). The two formats are incompatible.
465 bool "Enable LZMA decompression support"
467 This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
468 a dictionary compression algorithm that provides a high compression
469 ratio and fairly fast decompression speed. See also
470 CONFIG_CMD_LZMADEC which provides a decode command.
473 bool "Enable LZO decompression support"
475 This enables support for the LZO compression algorithm.
478 bool "Enable gzip decompression support"
482 This enables support for GZIP compression algorithm.
484 config ZLIB_UNCOMPRESS
485 bool "Enables zlib's uncompress() functionality"
487 This enables an extra zlib functionality: the uncompress() function,
488 which decompresses data from a buffer into another, knowing their
489 sizes. Unlike gunzip(), there is no header parsing.
491 config GZIP_COMPRESSED
496 bool "Enable bzip2 decompression support"
498 This enables support for BZIP2 compression algorithm.
504 This enables ZLIB compression lib.
507 bool "Enable Zstandard decompression support"
510 This enables Zstandard decompression library.
513 bool "Enable LZ4 decompression support in SPL"
515 This enables support for the LZ4 decompression algorithm in SPL. LZ4
516 is a lossless data compression algorithm that is focused on
517 fast compression and decompression speed. It belongs to the LZ77
518 family of byte-oriented compression schemes.
521 bool "Enable LZMA decompression support for SPL build"
523 This enables support for LZMA compression algorithm for SPL boot.
526 bool "Enable LZO decompression support in SPL"
528 This enables support for LZO compression algorithm in the SPL.
531 bool "Enable gzip decompression support for SPL build"
534 This enables support for the GZIP compression algorithm for SPL boot.
539 This enables compression lib for SPL boot.
542 bool "Enable Zstandard decompression support in SPL"
545 This enables Zstandard decompression library in the SPL.
550 bool "Enable function for getting errno-related string message"
552 The function errno_str(int errno), returns a pointer to the errno
553 corresponding text message:
554 - if errno is null or positive number - a pointer to "Success" message
555 - if errno is negative - a pointer to errno related message
558 bool "Enable hexdump"
560 This enables functions for printing dumps of binary data.
563 bool "Enable hexdump in SPL"
564 depends on SPL && HEXDUMP
566 This enables functions for printing dumps of binary data in
572 This enables functions for parsing command-line options.
575 bool "Enable the FDT library"
576 default y if OF_CONTROL
578 This enables the FDT library (libfdt). It provides functions for
579 accessing binary device tree images in memory, such as adding and
580 removing nodes and properties, scanning through the tree and finding
581 particular compatible nodes. The library operates on a flattened
582 version of the device tree.
584 config OF_LIBFDT_ASSUME_MASK
585 hex "Mask of conditions to assume for libfdt"
586 depends on OF_LIBFDT || FIT
589 Use this to change the assumptions made by libfdt about the
590 device tree it is working with. A value of 0 means that no assumptions
591 are made, and libfdt is able to deal with malicious data. A value of
592 0xff means all assumptions are made and any invalid data may cause
593 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
595 config OF_LIBFDT_OVERLAY
596 bool "Enable the FDT library overlay support"
598 default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE
600 This enables the FDT library (libfdt) overlay support.
603 bool "Enable the FDT library for SPL"
604 default y if SPL_OF_CONTROL
606 This enables the FDT library (libfdt). It provides functions for
607 accessing binary device tree images in memory, such as adding and
608 removing nodes and properties, scanning through the tree and finding
609 particular compatible nodes. The library operates on a flattened
610 version of the device tree.
612 config SPL_OF_LIBFDT_ASSUME_MASK
613 hex "Mask of conditions to assume for libfdt"
614 depends on SPL_OF_LIBFDT || FIT
617 Use this to change the assumptions made by libfdt in SPL about the
618 device tree it is working with. A value of 0 means that no assumptions
619 are made, and libfdt is able to deal with malicious data. A value of
620 0xff means all assumptions are made and any invalid data may cause
621 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
624 bool "Enable the FDT library for TPL"
625 default y if TPL_OF_CONTROL
627 This enables the FDT library (libfdt). It provides functions for
628 accessing binary device tree images in memory, such as adding and
629 removing nodes and properties, scanning through the tree and finding
630 particular compatible nodes. The library operates on a flattened
631 version of the device tree.
633 config TPL_OF_LIBFDT_ASSUME_MASK
634 hex "Mask of conditions to assume for libfdt"
635 depends on TPL_OF_LIBFDT || FIT
638 Use this to change the assumptions made by libfdt in TPL about the
639 device tree it is working with. A value of 0 means that no assumptions
640 are made, and libfdt is able to deal with malicious data. A value of
641 0xff means all assumptions are made and any invalid data may cause
642 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
644 config FDT_FIXUP_PARTITIONS
645 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
647 depends on CMD_MTDPARTS
649 Allow overwriting defined partitions in the device tree blob
650 using partition info defined in the 'mtdparts' environment
654 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
656 config BLOBLIST_TABLES
657 bool "Put tables in a bloblist"
658 depends on X86 && BLOBLIST
660 Normally tables are placed at address 0xf0000 and can be up to 64KB
661 long. With this option, tables are instead placed in the bloblist
662 with a pointer from 0xf0000. The size can then be larger and the
663 tables can be placed high in memory.
665 config GENERATE_SMBIOS_TABLE
666 bool "Generate an SMBIOS (System Management BIOS) table"
668 depends on X86 || EFI_LOADER
670 The System Management BIOS (SMBIOS) specification addresses how
671 motherboard and system vendors present management information about
672 their products in a standard format by extending the BIOS interface
673 on Intel architecture systems.
675 Check http://www.dmtf.org/standards/smbios for details.
677 See also SMBIOS_SYSINFO which allows SMBIOS values to be provided in
681 bool "enable continued fraction calculation routines"
683 config SPL_LIB_RATIONAL
684 bool "enable continued fraction calculation routines for SPL"
695 Enable asn1 decoder library.
700 Enable fast lookup object identifier registry.
705 A simple parser for SMBIOS data.
707 source lib/efi/Kconfig
708 source lib/efi_loader/Kconfig
709 source lib/optee/Kconfig
712 bool "enable fdtdec test"
721 Support basic elf loading/validating functions.
722 This supports for 32 bit and 64 bit versions.
725 bool "Enable the logical memory blocks library (lmb)"
726 default y if ARC || ARM || M68K || MICROBLAZE || MIPS || NDS32 || \
727 NIOS2 || PPC || RISCV || SANDBOX || SH || X86 || XTENSA
729 Support the library logical memory blocks.
731 config LMB_USE_MAX_REGIONS
732 bool "Use a commun number of memory and reserved regions in lmb lib"
736 Define the number of supported memory regions in the library logical
738 This feature allow to reduce the lmb library size by using compiler
739 optimization when LMB_MEMORY_REGIONS == LMB_RESERVED_REGIONS.
741 config LMB_MAX_REGIONS
742 int "Number of memory and reserved regions in lmb lib"
743 depends on LMB && LMB_USE_MAX_REGIONS
746 Define the number of supported regions, memory and reserved, in the
747 library logical memory blocks.
749 config LMB_MEMORY_REGIONS
750 int "Number of memory regions in lmb lib"
751 depends on LMB && !LMB_USE_MAX_REGIONS
754 Define the number of supported memory regions in the library logical
756 The minimal value is CONFIG_NR_DRAM_BANKS.
758 config LMB_RESERVED_REGIONS
759 int "Number of reserved regions in lmb lib"
760 depends on LMB && !LMB_USE_MAX_REGIONS
763 Define the number of supported reserved regions in the library logical
768 config PHANDLE_CHECK_SEQ
769 bool "Enable phandle check while getting sequence number"
771 When there are multiple device tree nodes with same name,
772 enable this config option to distinguish them using
773 phandles in fdtdec_get_alias_seq() function.