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.
43 config DYNAMIC_CRC_TABLE
44 bool "Enable Dynamic tables for CRC"
46 Enable this option to calculate entries for CRC tables at runtime.
47 This can be helpful when reducing the size of the build image
49 config HAVE_ARCH_IOMAP
52 Enable this option if architecture provides io{read,write}{8,16,32}
53 I/O accessor functions.
55 config HAVE_PRIVATE_LIBGCC
68 select SPL_STRTO if !SPL_USE_TINY_PRINTF
73 select TPL_STRTO if !TPL_USE_TINY_PRINTF
102 config IMAGE_SPARSE_FILLBUF_SIZE
103 hex "Android sparse image CHUNK_TYPE_FILL buffer size"
105 depends on IMAGE_SPARSE
107 Set the size of the fill buffer used when processing CHUNK_TYPE_FILL
110 config USE_PRIVATE_LIBGCC
111 bool "Use private libgcc"
112 depends on HAVE_PRIVATE_LIBGCC
113 default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
115 This option allows you to use the built-in libgcc implementation
116 of U-Boot instead of the one provided by the compiler.
123 The frequency of the timer returned by get_timer().
124 get_timer() must operate in milliseconds and this option must be
127 config SPL_USE_TINY_PRINTF
128 bool "Enable tiny printf() version in SPL"
132 This option enables a tiny, stripped down printf version.
133 This should only be used in space limited environments,
134 like SPL versions with hard memory limits. This version
135 reduces the code size by about 2.5KiB on armv7.
137 The supported format specifiers are %c, %s, %u/%d and %x.
139 config TPL_USE_TINY_PRINTF
140 bool "Enable tiny printf() version in TPL"
142 default y if SPL_USE_TINY_PRINTF
144 This option enables a tiny, stripped down printf version.
145 This should only be used in space limited environments,
146 like SPL versions with hard memory limits. This version
147 reduces the code size by about 2.5KiB on armv7.
149 The supported format specifiers are %c, %s, %u/%d and %x.
152 bool "Do not reset the system on fatal error"
154 Define this option to stop the system in case of a fatal error,
155 so that you have to reset it manually. This is probably NOT a good
156 idea for an embedded system where you want the system to reboot
157 automatically as fast as possible, but it may be useful during
158 development since you can try to debug the conditions that lead to
162 bool "Enable regular expression support"
165 If this variable is defined, U-Boot is linked against the
166 SLRE (Super Light Regular Expression) library, which adds
167 regex support to some commands, for example "env grep" and
171 prompt "Pseudo-random library support type"
172 depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID || \
173 RNG_SANDBOX || UT_LIB && AES || FAT_WRITE
176 Select the library to provide pseudo-random number generator
177 functions. LIB_HW_RAND supports certain hardware engines that
178 provide this functionality. If in doubt, select LIB_RAND.
181 bool "Pseudo-random library support"
184 bool "HW Engine for random library support"
188 config SPL_TINY_MEMSET
189 bool "Use a very small memset() in SPL"
191 The faster memset() is the arch-specific one (if available) enabled
192 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
193 better performance by writing a word at a time. But in very
194 size-constrained environments even this may be too big. Enable this
195 option to reduce code size slightly at the cost of some speed.
197 config TPL_TINY_MEMSET
198 bool "Use a very small memset() in TPL"
200 The faster memset() is the arch-specific one (if available) enabled
201 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
202 better performance by writing a word at a time. But in very
203 size-constrained environments even this may be too big. Enable this
204 option to reduce code size slightly at the cost of some speed.
210 bool "Bit reverse library from Linux"
213 bool "Support for tracing of function calls and timing"
217 Enables function tracing within U-Boot. This allows recording of call
218 traces including timing information. The command can write data to
219 memory for exporting for analysis (e.g. using bootchart).
220 See doc/README.trace for full details.
222 config TRACE_BUFFER_SIZE
223 hex "Size of trace buffer in U-Boot"
227 Sets the size of the trace buffer in U-Boot. This is allocated from
228 memory during relocation. If this buffer is too small, the trace
229 history will be truncated, with later records omitted.
231 If early trace is enabled (i.e. before relocation), this buffer must
232 be large enough to include all the data from the early trace buffer as
233 well, since this is copied over to the main buffer during relocation.
235 A trace record is emitted for each function call and each record is
236 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If
237 the size is too small then 'trace stats' will show a message saying
238 how many records were dropped due to buffer overflow.
240 config TRACE_CALL_DEPTH_LIMIT
241 int "Trace call depth limit"
245 Sets the maximum call depth up to which function calls are recorded.
248 bool "Enable tracing before relocation"
251 Sometimes it is helpful to trace execution of U-Boot before
252 relocation. This is possible by using a arch-specific, fixed buffer
253 position in memory. Enable this option to start tracing as early as
254 possible after U-Boot starts.
256 config TRACE_EARLY_SIZE
257 hex "Size of early trace buffer in U-Boot"
258 depends on TRACE_EARLY
261 Sets the size of the early trace buffer in bytes. This is used to hold
262 tracing information before relocation.
264 config TRACE_EARLY_CALL_DEPTH_LIMIT
265 int "Early trace call depth limit"
266 depends on TRACE_EARLY
269 Sets the maximum call depth up to which function calls are recorded
270 during early tracing.
272 config TRACE_EARLY_ADDR
273 hex "Address of early trace buffer in U-Boot"
274 depends on TRACE_EARLY
277 Sets the address of the early trace buffer in U-Boot. This memory
278 must be accessible before relocation.
280 A trace record is emitted for each function call and each record is
281 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If
282 the size is too small then the message which says the amount of early
283 data being coped will the the same as the
285 source lib/dhry/Kconfig
287 menu "Security support"
290 bool "Support the AES algorithm"
292 This provides a means to encrypt and decrypt data using the AES
293 (Advanced Encryption Standard). This algorithm uses a symetric key
294 and is widely used as a streaming cipher. Different key lengths are
295 supported by the algorithm but only a 128-bit key is supported at
298 source lib/rsa/Kconfig
299 source lib/crypto/Kconfig
300 source lib/crypt/Kconfig
303 bool "Trusted Platform Module (TPM) Support"
306 This enables support for TPMs which can be used to provide security
307 features for your board. The TPM can be connected via LPC or I2C
308 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
309 command to interactive the TPM. Driver model support is provided
310 for the low-level TPM interface, but only one TPM is supported at
311 a time by the TPM library.
314 bool "Trusted Platform Module (TPM) Support in SPL"
317 This enables support for TPMs which can be used to provide security
318 features for your board. The TPM can be connected via LPC or I2C
319 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
320 command to interactive the TPM. Driver model support is provided
321 for the low-level TPM interface, but only one TPM is supported at
322 a time by the TPM library.
325 bool "Trusted Platform Module (TPM) Support in TPL"
328 This enables support for TPMs which can be used to provide security
329 features for your board. The TPM can be connected via LPC or I2C
330 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
331 command to interactive the TPM. Driver model support is provided
332 for the low-level TPM interface, but only one TPM is supported at
333 a time by the TPM library.
337 menu "Android Verified Boot"
340 bool "Android Verified Boot 2.0 support"
341 depends on ANDROID_BOOT_IMAGE
344 This enables support of Android Verified Boot 2.0 which can be used
345 to assure the end user of the integrity of the software running on a
346 device. Introduces such features as boot chain of trust, rollback
351 menu "Hashing Support"
354 bool "Enable SHA1 support"
356 This option enables support of hashing using SHA1 algorithm.
357 The hash is calculated in software.
358 The SHA1 algorithm produces a 160-bit (20-byte) hash value
362 bool "Enable SHA256 support"
364 This option enables support of hashing using SHA256 algorithm.
365 The hash is calculated in software.
366 The SHA256 algorithm produces a 256-bit (32-byte) hash value
370 bool "Enable SHA512 algorithm"
372 This option enables support of internal SHA512 algorithm.
375 bool "Enable SHA512 support"
376 depends on SHA512_ALGO
378 This option enables support of hashing using SHA512 algorithm.
379 The hash is calculated in software.
380 The SHA512 algorithm produces a 512-bit (64-byte) hash value
384 bool "Enable SHA384 support"
385 depends on SHA512_ALGO
387 This option enables support of hashing using SHA384 algorithm.
388 The hash is calculated in software.
389 The SHA384 algorithm produces a 384-bit (48-byte) hash value
393 bool "Enable hardware acceleration for SHA hash functions"
395 This option enables hardware acceleration for the SHA1 and SHA256
396 hashing algorithms. This affects the 'hash' command and also the
397 hash_lookup_algo() function.
401 config SHA512_HW_ACCEL
402 bool "Enable hardware acceleration for SHA512"
403 depends on SHA512_ALGO
405 This option enables hardware acceleration for the SHA384 and SHA512
406 hashing algorithms. This affects the 'hash' command and also the
407 hash_lookup_algo() function.
409 config SHA_PROG_HW_ACCEL
410 bool "Enable Progressive hashing support using hardware"
412 This option enables hardware-acceleration for SHA progressive
414 Data can be streamed in a block at a time and the hashing is
415 performed in hardware.
420 bool "Support MD5 algorithm"
422 This option enables MD5 support. MD5 is an algorithm designed
423 in 1991 that produces a 16-byte digest (or checksum) from its input
424 data. It has a number of vulnerabilities which preclude its use in
425 security applications, but it can be useful for providing a quick
426 checksum of a block of data.
429 bool "Support MD5 algorithm in SPL"
431 This option enables MD5 support in SPL. 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.
445 menu "Compression Support"
448 bool "Enable LZ4 decompression support"
450 If this option is set, support for LZ4 compressed images
451 is included. The LZ4 algorithm can run in-place as long as the
452 compressed image is loaded to the end of the output buffer, and
453 trades lower compression ratios for much faster decompression.
455 NOTE: This implements the release version of the LZ4 frame
456 format as generated by default by the 'lz4' command line tool.
457 This is not the same as the outdated, less efficient legacy
458 frame format currently (2015) implemented in the Linux kernel
459 (generated by 'lz4 -l'). The two formats are incompatible.
462 bool "Enable LZMA decompression support"
464 This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
465 a dictionary compression algorithm that provides a high compression
466 ratio and fairly fast decompression speed. See also
467 CONFIG_CMD_LZMADEC which provides a decode command.
470 bool "Enable LZO decompression support"
472 This enables support for LZO compression algorithm.r
475 bool "Enable gzip decompression support"
479 This enables support for GZIP compression algorithm.
481 config ZLIB_UNCOMPRESS
482 bool "Enables zlib's uncompress() functionality"
484 This enables an extra zlib functionality: the uncompress() function,
485 which decompresses data from a buffer into another, knowing their
486 sizes. Unlike gunzip(), there is no header parsing.
488 config GZIP_COMPRESSED
493 bool "Enable bzip2 decompression support"
495 This enables support for BZIP2 compression algorithm.
501 This enables ZLIB compression lib.
504 bool "Enable Zstandard decompression support"
507 This enables Zstandard decompression library.
510 bool "Enable LZ4 decompression support in SPL"
512 This enables support for the LZ4 decompression algorithm in SPL. LZ4
513 is a lossless data compression algorithm that is focused on
514 fast compression and decompression speed. It belongs to the LZ77
515 family of byte-oriented compression schemes.
518 bool "Enable LZMA decompression support for SPL build"
520 This enables support for LZMA compression algorithm for SPL boot.
523 bool "Enable LZO decompression support in SPL"
525 This enables support for LZO compression algorithm in the SPL.
528 bool "Enable gzip decompression support for SPL build"
531 This enables support for GZIP compression altorithm for SPL boot.
536 This enables compression lib for SPL boot.
539 bool "Enable Zstandard decompression support in SPL"
542 This enables Zstandard decompression library in the SPL.
547 bool "Enable function for getting errno-related string message"
549 The function errno_str(int errno), returns a pointer to the errno
550 corresponding text message:
551 - if errno is null or positive number - a pointer to "Success" message
552 - if errno is negative - a pointer to errno related message
555 bool "Enable hexdump"
557 This enables functions for printing dumps of binary data.
560 bool "Enable hexdump in SPL"
564 This enables functions for printing dumps of binary data in
570 This enables functions for parsing command-line options.
573 bool "Enable the FDT library"
574 default y if OF_CONTROL
576 This enables the FDT library (libfdt). It provides functions for
577 accessing binary device tree images in memory, such as adding and
578 removing nodes and properties, scanning through the tree and finding
579 particular compatible nodes. The library operates on a flattened
580 version of the device tree.
582 config OF_LIBFDT_ASSUME_MASK
583 hex "Mask of conditions to assume for libfdt"
584 depends on OF_LIBFDT || FIT
587 Use this to change the assumptions made by libfdt about the
588 device tree it is working with. A value of 0 means that no assumptions
589 are made, and libfdt is able to deal with malicious data. A value of
590 0xff means all assumptions are made and any invalid data may cause
591 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
593 config OF_LIBFDT_OVERLAY
594 bool "Enable the FDT library overlay support"
596 default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE
598 This enables the FDT library (libfdt) overlay support.
601 bool "Enable the FDT library for SPL"
602 default y if SPL_OF_CONTROL
604 This enables the FDT library (libfdt). It provides functions for
605 accessing binary device tree images in memory, such as adding and
606 removing nodes and properties, scanning through the tree and finding
607 particular compatible nodes. The library operates on a flattened
608 version of the device tree.
610 config SPL_OF_LIBFDT_ASSUME_MASK
611 hex "Mask of conditions to assume for libfdt"
612 depends on SPL_OF_LIBFDT || FIT
615 Use this to change the assumptions made by libfdt in SPL about the
616 device tree it is working with. A value of 0 means that no assumptions
617 are made, and libfdt is able to deal with malicious data. A value of
618 0xff means all assumptions are made and any invalid data may cause
619 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
622 bool "Enable the FDT library for TPL"
623 default y if TPL_OF_CONTROL
625 This enables the FDT library (libfdt). It provides functions for
626 accessing binary device tree images in memory, such as adding and
627 removing nodes and properties, scanning through the tree and finding
628 particular compatible nodes. The library operates on a flattened
629 version of the device tree.
631 config TPL_OF_LIBFDT_ASSUME_MASK
632 hex "Mask of conditions to assume for libfdt"
633 depends on TPL_OF_LIBFDT || FIT
636 Use this to change the assumptions made by libfdt in TPL about the
637 device tree it is working with. A value of 0 means that no assumptions
638 are made, and libfdt is able to deal with malicious data. A value of
639 0xff means all assumptions are made and any invalid data may cause
640 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
642 config FDT_FIXUP_PARTITIONS
643 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
645 depends on CMD_MTDPARTS
647 Allow overwriting defined partitions in the device tree blob
648 using partition info defined in the 'mtdparts' environment
652 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
654 config BLOBLIST_TABLES
655 bool "Put tables in a bloblist"
656 depends on X86 && BLOBLIST
658 Normally tables are placed at address 0xf0000 and can be up to 64KB
659 long. With this option, tables are instead placed in the bloblist
660 with a pointer from 0xf0000. The size can then be larger and the
661 tables can be placed high in memory.
663 config GENERATE_SMBIOS_TABLE
664 bool "Generate an SMBIOS (System Management BIOS) table"
666 depends on X86 || EFI_LOADER
668 The System Management BIOS (SMBIOS) specification addresses how
669 motherboard and system vendors present management information about
670 their products in a standard format by extending the BIOS interface
671 on Intel architecture systems.
673 Check http://www.dmtf.org/standards/smbios for details.
675 See also SMBIOS_SYSINFO which allows SMBIOS values to be provided in
679 bool "enable continued fraction calculation routines"
681 config SPL_LIB_RATIONAL
682 bool "enable continued fraction calculation routines for SPL"
693 Enable asn1 decoder library.
698 Enable fast lookup object identifier registry.
703 A simple parser for SMBIOS data.
705 source lib/efi/Kconfig
706 source lib/efi_loader/Kconfig
707 source lib/optee/Kconfig
710 bool "enable fdtdec test"
719 Support basic elf loading/validating functions.
720 This supports for 32 bit and 64 bit versions.
723 bool "Enable the logical memory blocks library (lmb)"
724 default y if ARC || ARM || M68K || MICROBLAZE || MIPS || NDS32 || \
725 NIOS2 || PPC || RISCV || SANDBOX || SH || X86 || XTENSA
727 Support the library logical memory blocks.
729 config LMB_USE_MAX_REGIONS
730 bool "Use a commun number of memory and reserved regions in lmb lib"
734 Define the number of supported memory regions in the library logical
736 This feature allow to reduce the lmb library size by using compiler
737 optimization when LMB_MEMORY_REGIONS == LMB_RESERVED_REGIONS.
739 config LMB_MAX_REGIONS
740 int "Number of memory and reserved regions in lmb lib"
741 depends on LMB && LMB_USE_MAX_REGIONS
744 Define the number of supported regions, memory and reserved, in the
745 library logical memory blocks.
747 config LMB_MEMORY_REGIONS
748 int "Number of memory regions in lmb lib"
749 depends on LMB && !LMB_USE_MAX_REGIONS
752 Define the number of supported memory regions in the library logical
754 The minimal value is CONFIG_NR_DRAM_BANKS.
756 config LMB_RESERVED_REGIONS
757 int "Number of reserved regions in lmb lib"
758 depends on LMB && !LMB_USE_MAX_REGIONS
761 Define the number of supported reserved regions in the library logical
766 config PHANDLE_CHECK_SEQ
767 bool "Enable phandle check while getting sequence number"
770 When there are multiple device tree nodes with same name,
771 enable this config option to distinguish them using
772 phandles in fdtdec_get_alias_seq() function.