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/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
352 This enables support of Android Verified Boot 2.0 which can be used
353 to assure the end user of the integrity of the software running on a
354 device. Introduces such features as boot chain of trust, rollback
359 menu "Hashing Support"
362 bool "Enable SHA1 support"
364 This option enables support of hashing using SHA1 algorithm.
365 The hash is calculated in software.
366 The SHA1 algorithm produces a 160-bit (20-byte) hash value
370 bool "Enable SHA256 support"
372 This option enables support of hashing using SHA256 algorithm.
373 The hash is calculated in software.
374 The SHA256 algorithm produces a 256-bit (32-byte) hash value
378 bool "Enable SHA512 algorithm"
380 This option enables support of internal SHA512 algorithm.
383 bool "Enable SHA512 support"
384 depends on SHA512_ALGO
386 This option enables support of hashing using SHA512 algorithm.
387 The hash is calculated in software.
388 The SHA512 algorithm produces a 512-bit (64-byte) hash value
392 bool "Enable SHA384 support"
393 depends on SHA512_ALGO
395 This option enables support of hashing using SHA384 algorithm.
396 The hash is calculated in software.
397 The SHA384 algorithm produces a 384-bit (48-byte) hash value
401 bool "Enable hardware acceleration for SHA hash functions"
403 This option enables hardware acceleration for the SHA1 and SHA256
404 hashing algorithms. This affects the 'hash' command and also the
405 hash_lookup_algo() function.
409 config SHA512_HW_ACCEL
410 bool "Enable hardware acceleration for SHA512"
411 depends on SHA512_ALGO
413 This option enables hardware acceleration for the SHA384 and SHA512
414 hashing algorithms. This affects the 'hash' command and also the
415 hash_lookup_algo() function.
417 config SHA_PROG_HW_ACCEL
418 bool "Enable Progressive hashing support using hardware"
420 This option enables hardware-acceleration for SHA progressive
422 Data can be streamed in a block at a time and the hashing is
423 performed in hardware.
428 bool "Support MD5 algorithm"
430 This option enables MD5 support. MD5 is an algorithm designed
431 in 1991 that produces a 16-byte digest (or checksum) from its input
432 data. It has a number of vulnerabilities which preclude its use in
433 security applications, but it can be useful for providing a quick
434 checksum of a block of data.
437 bool "Support MD5 algorithm in SPL"
439 This option enables MD5 support in SPL. MD5 is an algorithm designed
440 in 1991 that produces a 16-byte digest (or checksum) from its input
441 data. It has a number of vulnerabilities which preclude its use in
442 security applications, but it can be useful for providing a quick
443 checksum of a block of data.
453 menu "Compression Support"
456 bool "Enable LZ4 decompression support"
458 If this option is set, support for LZ4 compressed images
459 is included. The LZ4 algorithm can run in-place as long as the
460 compressed image is loaded to the end of the output buffer, and
461 trades lower compression ratios for much faster decompression.
463 NOTE: This implements the release version of the LZ4 frame
464 format as generated by default by the 'lz4' command line tool.
465 This is not the same as the outdated, less efficient legacy
466 frame format currently (2015) implemented in the Linux kernel
467 (generated by 'lz4 -l'). The two formats are incompatible.
470 bool "Enable LZMA decompression support"
472 This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
473 a dictionary compression algorithm that provides a high compression
474 ratio and fairly fast decompression speed. See also
475 CONFIG_CMD_LZMADEC which provides a decode command.
478 bool "Enable LZO decompression support"
480 This enables support for LZO compression algorithm.r
483 bool "Enable gzip decompression support"
487 This enables support for GZIP compression algorithm.
489 config ZLIB_UNCOMPRESS
490 bool "Enables zlib's uncompress() functionality"
492 This enables an extra zlib functionality: the uncompress() function,
493 which decompresses data from a buffer into another, knowing their
494 sizes. Unlike gunzip(), there is no header parsing.
496 config GZIP_COMPRESSED
501 bool "Enable bzip2 decompression support"
503 This enables support for BZIP2 compression algorithm.
509 This enables ZLIB compression lib.
512 bool "Enable Zstandard decompression support"
515 This enables Zstandard decompression library.
518 bool "Enable LZ4 decompression support in SPL"
520 This enables support for the LZ4 decompression algorithm in SPL. LZ4
521 is a lossless data compression algorithm that is focused on
522 fast compression and decompression speed. It belongs to the LZ77
523 family of byte-oriented compression schemes.
526 bool "Enable LZMA decompression support for SPL build"
528 This enables support for LZMA compression algorithm for SPL boot.
531 bool "Enable LZO decompression support in SPL"
533 This enables support for LZO compression algorithm in the SPL.
536 bool "Enable gzip decompression support for SPL build"
539 This enables support for GZIP compression altorithm for SPL boot.
544 This enables compression lib for SPL boot.
547 bool "Enable Zstandard decompression support in SPL"
550 This enables Zstandard decompression library in the SPL.
555 bool "Enable function for getting errno-related string message"
557 The function errno_str(int errno), returns a pointer to the errno
558 corresponding text message:
559 - if errno is null or positive number - a pointer to "Success" message
560 - if errno is negative - a pointer to errno related message
563 bool "Enable hexdump"
565 This enables functions for printing dumps of binary data.
568 bool "Enable hexdump in SPL"
569 depends on SPL && HEXDUMP
571 This enables functions for printing dumps of binary data in
577 This enables functions for parsing command-line options.
580 bool "Enable the FDT library"
581 default y if OF_CONTROL
583 This enables the FDT library (libfdt). It provides functions for
584 accessing binary device tree images in memory, such as adding and
585 removing nodes and properties, scanning through the tree and finding
586 particular compatible nodes. The library operates on a flattened
587 version of the device tree.
589 config OF_LIBFDT_ASSUME_MASK
590 hex "Mask of conditions to assume for libfdt"
591 depends on OF_LIBFDT || FIT
594 Use this to change the assumptions made by libfdt about the
595 device tree it is working with. A value of 0 means that no assumptions
596 are made, and libfdt is able to deal with malicious data. A value of
597 0xff means all assumptions are made and any invalid data may cause
598 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
600 config OF_LIBFDT_OVERLAY
601 bool "Enable the FDT library overlay support"
603 default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE
605 This enables the FDT library (libfdt) overlay support.
608 bool "Enable the FDT library for SPL"
609 default y if SPL_OF_CONTROL
611 This enables the FDT library (libfdt). It provides functions for
612 accessing binary device tree images in memory, such as adding and
613 removing nodes and properties, scanning through the tree and finding
614 particular compatible nodes. The library operates on a flattened
615 version of the device tree.
617 config SPL_OF_LIBFDT_ASSUME_MASK
618 hex "Mask of conditions to assume for libfdt"
619 depends on SPL_OF_LIBFDT || FIT
622 Use this to change the assumptions made by libfdt in SPL about the
623 device tree it is working with. A value of 0 means that no assumptions
624 are made, and libfdt is able to deal with malicious data. A value of
625 0xff means all assumptions are made and any invalid data may cause
626 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
629 bool "Enable the FDT library for TPL"
630 default y if TPL_OF_CONTROL
632 This enables the FDT library (libfdt). It provides functions for
633 accessing binary device tree images in memory, such as adding and
634 removing nodes and properties, scanning through the tree and finding
635 particular compatible nodes. The library operates on a flattened
636 version of the device tree.
638 config TPL_OF_LIBFDT_ASSUME_MASK
639 hex "Mask of conditions to assume for libfdt"
640 depends on TPL_OF_LIBFDT || FIT
643 Use this to change the assumptions made by libfdt in TPL about the
644 device tree it is working with. A value of 0 means that no assumptions
645 are made, and libfdt is able to deal with malicious data. A value of
646 0xff means all assumptions are made and any invalid data may cause
647 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
649 config FDT_FIXUP_PARTITIONS
650 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
652 depends on CMD_MTDPARTS
654 Allow overwriting defined partitions in the device tree blob
655 using partition info defined in the 'mtdparts' environment
659 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
661 config BLOBLIST_TABLES
662 bool "Put tables in a bloblist"
663 depends on X86 && BLOBLIST
665 Normally tables are placed at address 0xf0000 and can be up to 64KB
666 long. With this option, tables are instead placed in the bloblist
667 with a pointer from 0xf0000. The size can then be larger and the
668 tables can be placed high in memory.
670 config GENERATE_SMBIOS_TABLE
671 bool "Generate an SMBIOS (System Management BIOS) table"
673 depends on X86 || EFI_LOADER
675 The System Management BIOS (SMBIOS) specification addresses how
676 motherboard and system vendors present management information about
677 their products in a standard format by extending the BIOS interface
678 on Intel architecture systems.
680 Check http://www.dmtf.org/standards/smbios for details.
682 See also SMBIOS_SYSINFO which allows SMBIOS values to be provided in
686 bool "enable continued fraction calculation routines"
688 config SPL_LIB_RATIONAL
689 bool "enable continued fraction calculation routines for SPL"
700 Enable asn1 decoder library.
705 Enable fast lookup object identifier registry.
710 A simple parser for SMBIOS data.
712 source lib/efi/Kconfig
713 source lib/efi_loader/Kconfig
714 source lib/optee/Kconfig
717 bool "enable fdtdec test"
726 Support basic elf loading/validating functions.
727 This supports for 32 bit and 64 bit versions.
730 bool "Enable the logical memory blocks library (lmb)"
731 default y if ARC || ARM || M68K || MICROBLAZE || MIPS || NDS32 || \
732 NIOS2 || PPC || RISCV || SANDBOX || SH || X86 || XTENSA
734 Support the library logical memory blocks.
736 config LMB_USE_MAX_REGIONS
737 bool "Use a commun number of memory and reserved regions in lmb lib"
741 Define the number of supported memory regions in the library logical
743 This feature allow to reduce the lmb library size by using compiler
744 optimization when LMB_MEMORY_REGIONS == LMB_RESERVED_REGIONS.
746 config LMB_MAX_REGIONS
747 int "Number of memory and reserved regions in lmb lib"
748 depends on LMB && LMB_USE_MAX_REGIONS
751 Define the number of supported regions, memory and reserved, in the
752 library logical memory blocks.
754 config LMB_MEMORY_REGIONS
755 int "Number of memory regions in lmb lib"
756 depends on LMB && !LMB_USE_MAX_REGIONS
759 Define the number of supported memory regions in the library logical
761 The minimal value is CONFIG_NR_DRAM_BANKS.
763 config LMB_RESERVED_REGIONS
764 int "Number of reserved regions in lmb lib"
765 depends on LMB && !LMB_USE_MAX_REGIONS
768 Define the number of supported reserved regions in the library logical
773 config PHANDLE_CHECK_SEQ
774 bool "Enable phandle check while getting sequence number"
777 When there are multiple device tree nodes with same name,
778 enable this config option to distinguish them using
779 phandles in fdtdec_get_alias_seq() function.