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.
18 config SYS_TIMER_COUNTS_DOWN
19 bool "System timer counts down rather than up"
22 bool "Access to physical memory region (> 4G)"
24 Some basic support is provided for operations on memory not
25 normally accessible to 32-bit U-Boot - e.g. some architectures
26 support access to more than 4G of memory on 32-bit
27 machines using physical address extension or similar.
28 Enable this to access this basic support, which only supports clearing
32 bool "Enable Software based BCH ECC"
34 Enables software based BCH ECC algorithm present in lib/bch.c
35 This is used by SoC platforms which do not have built-in ELM
36 hardware engine required for BCH ECC correction.
39 bool "Allow access to binman information in the device tree"
40 depends on BINMAN && DM && OF_CONTROL
41 default y if OF_SEPARATE || OF_EMBED
43 This enables U-Boot to access information about binman entries,
44 stored in the device tree in a binman node. Typical uses are to
45 locate entries in the firmware image. See binman.h for the available
48 config CC_OPTIMIZE_LIBS_FOR_SPEED
49 bool "Optimize libraries for speed"
51 Enabling this option will pass "-O2" to gcc when compiling
52 under "lib" directory.
59 config DYNAMIC_CRC_TABLE
60 bool "Enable Dynamic tables for CRC"
62 Enable this option to calculate entries for CRC tables at runtime.
63 This can be helpful when reducing the size of the build image
65 config HAVE_ARCH_IOMAP
68 Enable this option if architecture provides io{read,write}{8,16,32}
69 I/O accessor functions.
71 config HAVE_PRIVATE_LIBGCC
79 bool "GPT Random UUID generation"
82 Enable the generation of partitions with random UUIDs if none
90 bool "Support semihosting"
91 depends on ARM || RISCV
93 Semihosting is a method for a target to communicate with a host
94 debugger. It uses special instructions which the debugger will trap
95 on and interpret. This allows U-Boot to read/write files, print to
96 the console, and execute arbitrary commands on the host system.
98 Enabling this option will add support for reading and writing files
99 on the host system. If you don't have a debugger attached then trying
100 to do this will likely cause U-Boot to hang. Say 'n' if you are unsure.
102 config SEMIHOSTING_FALLBACK
103 bool "Recover gracefully when semihosting fails"
104 depends on SEMIHOSTING
107 Normally, if U-Boot makes a semihosting call and no debugger is
108 attached, then it will panic due to a synchronous abort
109 exception. This config adds an exception handler which will allow
110 U-Boot to recover. Say 'y' if unsure.
112 config SPL_SEMIHOSTING
113 bool "Support semihosting in SPL"
114 depends on SPL && (ARM || RISCV)
116 Semihosting is a method for a target to communicate with a host
117 debugger. It uses special instructions which the debugger will trap
118 on and interpret. This allows U-Boot to read/write files, print to
119 the console, and execute arbitrary commands on the host system.
121 Enabling this option will add support for reading and writing files
122 on the host system. If you don't have a debugger attached then trying
123 to do this will likely cause U-Boot to hang. Say 'n' if you are unsure.
125 config SPL_SEMIHOSTING_FALLBACK
126 bool "Recover gracefully when semihosting fails in SPL"
127 depends on SPL_SEMIHOSTING
128 select ARMV8_SPL_EXCEPTION_VECTORS if ARM64
131 Normally, if U-Boot makes a semihosting call and no debugger is
132 attached, then it will panic due to a synchronous abort
133 exception. This config adds an exception handler which will allow
134 U-Boot to recover. Say 'y' if unsure.
143 select SPL_STRTO if !SPL_USE_TINY_PRINTF
148 select TPL_STRTO if !TPL_USE_TINY_PRINTF
153 select VPL_STRTO if !VPL_USE_TINY_PRINTF
187 config IMAGE_SPARSE_FILLBUF_SIZE
188 hex "Android sparse image CHUNK_TYPE_FILL buffer size"
190 depends on IMAGE_SPARSE
192 Set the size of the fill buffer used when processing CHUNK_TYPE_FILL
195 config USE_PRIVATE_LIBGCC
196 bool "Use private libgcc"
197 depends on HAVE_PRIVATE_LIBGCC
198 default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
200 This option allows you to use the built-in libgcc implementation
201 of U-Boot instead of the one provided by the compiler.
208 The frequency of the timer returned by get_timer().
209 get_timer() must operate in milliseconds and this option must be
212 config SPL_USE_TINY_PRINTF
213 bool "Enable tiny printf() version in SPL"
217 This option enables a tiny, stripped down printf version.
218 This should only be used in space limited environments,
219 like SPL versions with hard memory limits. This version
220 reduces the code size by about 2.5KiB on armv7.
222 The supported format specifiers are %c, %s, %u/%d and %x.
224 config TPL_USE_TINY_PRINTF
225 bool "Enable tiny printf() version in TPL"
227 default y if SPL_USE_TINY_PRINTF
229 This option enables a tiny, stripped down printf version.
230 This should only be used in space limited environments,
231 like SPL versions with hard memory limits. This version
232 reduces the code size by about 2.5KiB on armv7.
234 The supported format specifiers are %c, %s, %u/%d and %x.
236 config VPL_USE_TINY_PRINTF
237 bool "Enable tiny printf() version for VPL"
240 This option enables a tiny, stripped down printf version.
241 This should only be used in space limited environments,
242 like SPL versions with hard memory limits. This version
243 reduces the code size by about 2.5KiB on armv7.
245 The supported format specifiers are %c, %s, %u/%d and %x.
248 bool "Do not reset the system on fatal error"
250 Define this option to stop the system in case of a fatal error,
251 so that you have to reset it manually. This is probably NOT a good
252 idea for an embedded system where you want the system to reboot
253 automatically as fast as possible, but it may be useful during
254 development since you can try to debug the conditions that lead to
258 bool "Enable regular expression support"
261 If this variable is defined, U-Boot is linked against the
262 SLRE (Super Light Regular Expression) library, which adds
263 regex support to some commands, for example "env grep" and
267 prompt "Pseudo-random library support type"
268 depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID || \
269 RNG_SANDBOX || UT_LIB && AES || FAT_WRITE
272 Select the library to provide pseudo-random number generator
273 functions. LIB_HW_RAND supports certain hardware engines that
274 provide this functionality. If in doubt, select LIB_RAND.
277 bool "Pseudo-random library support"
280 bool "HW Engine for random library support"
287 Enable this if your arch or board can support generating ACPI
288 (Advanced Configuration and Power Interface) tables. In this case
289 U-Boot can generate these tables and pass them to the Operating
293 bool "Enable support for ACPI libraries"
294 depends on SUPPORT_ACPI
296 Provides library functions for dealing with ACPI tables. This does
297 not necessarily include generation of tables
298 (see GENERATE_ACPI_TABLE), but allows for tables to be located.
301 bool "Enable support for ACPI libraries in SPL"
302 depends on SPL && SUPPORT_ACPI
304 Provides library functions for dealing with ACPI tables in SPL. This
305 does not necessarily include generation of tables
306 (see GENERATE_ACPI_TABLE), but allows for tables to be located.
308 config GENERATE_ACPI_TABLE
309 bool "Generate an ACPI (Advanced Configuration and Power Interface) table"
313 The Advanced Configuration and Power Interface (ACPI) specification
314 provides an open standard for device configuration and management
315 by the operating system. It defines platform-independent interfaces
316 for configuration and power management monitoring.
318 config SPL_TINY_MEMSET
319 bool "Use a very small memset() in SPL"
322 The faster memset() is the arch-specific one (if available) enabled
323 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
324 better performance by writing a word at a time. But in very
325 size-constrained environments even this may be too big. Enable this
326 option to reduce code size slightly at the cost of some speed.
328 config TPL_TINY_MEMSET
329 bool "Use a very small memset() in TPL"
332 The faster memset() is the arch-specific one (if available) enabled
333 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
334 better performance by writing a word at a time. But in very
335 size-constrained environments even this may be too big. Enable this
336 option to reduce code size slightly at the cost of some speed.
342 bool "Bit reverse library from Linux"
345 bool "Support for tracing of function calls and timing"
349 Enables function tracing within U-Boot. This allows recording of call
350 traces including timing information. The command can write data to
351 memory for exporting for analysis (e.g. using bootchart).
352 See doc/develop/trace.rst for full details.
354 config TRACE_BUFFER_SIZE
355 hex "Size of trace buffer in U-Boot"
359 Sets the size of the trace buffer in U-Boot. This is allocated from
360 memory during relocation. If this buffer is too small, the trace
361 history will be truncated, with later records omitted.
363 If early trace is enabled (i.e. before relocation), this buffer must
364 be large enough to include all the data from the early trace buffer as
365 well, since this is copied over to the main buffer during relocation.
367 A trace record is emitted for each function call and each record is
368 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If
369 the size is too small then 'trace stats' will show a message saying
370 how many records were dropped due to buffer overflow.
372 config TRACE_CALL_DEPTH_LIMIT
373 int "Trace call depth limit"
377 Sets the maximum call depth up to which function calls are recorded.
380 bool "Enable tracing before relocation"
383 Sometimes it is helpful to trace execution of U-Boot before
384 relocation. This is possible by using a arch-specific, fixed buffer
385 position in memory. Enable this option to start tracing as early as
386 possible after U-Boot starts.
388 config TRACE_EARLY_SIZE
389 hex "Size of early trace buffer in U-Boot"
390 depends on TRACE_EARLY
393 Sets the size of the early trace buffer in bytes. This is used to hold
394 tracing information before relocation.
396 config TRACE_EARLY_CALL_DEPTH_LIMIT
397 int "Early trace call depth limit"
398 depends on TRACE_EARLY
401 Sets the maximum call depth up to which function calls are recorded
402 during early tracing.
404 config TRACE_EARLY_ADDR
405 hex "Address of early trace buffer in U-Boot"
406 depends on TRACE_EARLY
409 Sets the address of the early trace buffer in U-Boot. This memory
410 must be accessible before relocation.
412 A trace record is emitted for each function call and each record is
413 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If
414 the size is too small then the message which says the amount of early
415 data being coped will the the same as the
418 bool "Enable circular buffer support"
420 source "lib/dhry/Kconfig"
422 menu "Security support"
425 bool "Support the AES algorithm"
427 This provides a means to encrypt and decrypt data using the AES
428 (Advanced Encryption Standard). This algorithm uses a symetric key
429 and is widely used as a streaming cipher. Different key lengths are
430 supported by the algorithm but only a 128-bit key is supported at
433 source "lib/ecdsa/Kconfig"
434 source "lib/rsa/Kconfig"
435 source "lib/crypto/Kconfig"
436 source "lib/crypt/Kconfig"
439 bool "Trusted Platform Module (TPM) Support"
444 This enables support for TPMs which can be used to provide security
445 features for your board. The TPM can be connected via LPC or I2C
446 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
447 command to interactive the TPM. Driver model support is provided
448 for the low-level TPM interface, but only one TPM is supported at
449 a time by the TPM library.
450 For size reasons only SHA1 is selected which is supported on TPM1.2.
451 If you want a fully functional TPM enable all hashing algorithms.
452 If you enabled measured boot all hashing algorithms are selected.
455 bool "Trusted Platform Module (TPM) Support in SPL"
459 This enables support for TPMs which can be used to provide security
460 features for your board. The TPM can be connected via LPC or I2C
461 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
462 command to interactive the TPM. Driver model support is provided
463 for the low-level TPM interface, but only one TPM is supported at
464 a time by the TPM library.
467 bool "Trusted Platform Module (TPM) Support in TPL"
470 This enables support for TPMs which can be used to provide security
471 features for your board. The TPM can be connected via LPC or I2C
472 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
473 command to interactive the TPM. Driver model support is provided
474 for the low-level TPM interface, but only one TPM is supported at
475 a time by the TPM library.
478 bool "Trusted Platform Module (TPM) Support in VPL"
481 This enables support for TPMs which can be used to provide security
482 features for your board. The TPM can be connected via LPC or I2C
483 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
484 command to interactive the TPM. Driver model support is provided
485 for the low-level TPM interface, but only one TPM is supported at
486 a time by the TPM library.
490 menu "Android Verified Boot"
493 bool "Android Verified Boot 2.0 support"
494 depends on ANDROID_BOOT_IMAGE
496 This enables support of Android Verified Boot 2.0 which can be used
497 to assure the end user of the integrity of the software running on a
498 device. Introduces such features as boot chain of trust, rollback
503 menu "Hashing Support"
506 bool "Enable BLAKE2 support"
508 This option enables support of hashing using BLAKE2B algorithm.
509 The hash is calculated in software.
510 The BLAKE2 algorithm produces a hash value (digest) between 1 and
514 bool "Enable SHA1 support"
516 This option enables support of hashing using SHA1 algorithm.
517 The hash is calculated in software.
518 The SHA1 algorithm produces a 160-bit (20-byte) hash value
522 bool "Enable SHA256 support"
524 This option enables support of hashing using SHA256 algorithm.
525 The hash is calculated in software.
526 The SHA256 algorithm produces a 256-bit (32-byte) hash value
530 bool "Enable SHA512 support"
531 default y if TI_SECURE_DEVICE && FIT_SIGNATURE
533 This option enables support of hashing using SHA512 algorithm.
534 The hash is calculated in software.
535 The SHA512 algorithm produces a 512-bit (64-byte) hash value
539 bool "Enable SHA384 support"
542 This option enables support of hashing using SHA384 algorithm.
543 The hash is calculated in software. This is also selects SHA512,
544 because these implementations share the bulk of the code..
545 The SHA384 algorithm produces a 384-bit (48-byte) hash value
549 bool "Enable hardware acceleration for SHA hash functions"
551 This option enables hardware acceleration for the SHA1 and SHA256
552 hashing algorithms. This affects the 'hash' command and also the
553 hash_lookup_algo() function.
558 bool "Enable CRC32 support in SPL"
559 default y if SPL_LEGACY_IMAGE_SUPPORT || SPL_EFI_PARTITION
560 default y if SPL_ENV_SUPPORT || TPL_BLOBLIST
562 This option enables support of hashing using CRC32 algorithm.
563 The CRC32 algorithm produces 32-bit checksum value. For FIT
564 images, this is the least secure type of checksum, suitable for
565 detected accidental image corruption. For secure applications you
566 should consider SHA256 or SHA384.
569 bool "Enable SHA1 support in SPL"
572 This option enables support of hashing using SHA1 algorithm.
573 The hash is calculated in software.
574 The SHA1 algorithm produces a 160-bit (20-byte) hash value
578 bool "Enable SHA256 support in SPL"
581 This option enables support of hashing using SHA256 algorithm.
582 The hash is calculated in software.
583 The SHA256 algorithm produces a 256-bit (32-byte) hash value
587 bool "Enable SHA512 support in SPL"
590 This option enables support of hashing using SHA512 algorithm.
591 The hash is calculated in software.
592 The SHA512 algorithm produces a 512-bit (64-byte) hash value
596 bool "Enable SHA384 support in SPL"
600 This option enables support of hashing using SHA384 algorithm.
601 The hash is calculated in software. This is also selects SHA512,
602 because these implementations share the bulk of the code..
603 The SHA384 algorithm produces a 384-bit (48-byte) hash value
606 config SPL_SHA_HW_ACCEL
607 bool "Enable hardware acceleration for SHA hash functions"
608 default y if SHA_HW_ACCEL
610 This option enables hardware acceleration for the SHA1 and SHA256
611 hashing algorithms. This affects the 'hash' command and also the
612 hash_lookup_algo() function.
614 config SPL_SHA_PROG_HW_ACCEL
615 bool "Enable Progressive hashing support using hardware in SPL"
616 depends on SHA_PROG_HW_ACCEL
619 This option enables hardware-acceleration for SHA progressive
621 Data can be streamed in a block at a time and the hashing is
622 performed in hardware.
627 bool "Enable SHA1 support in VPL"
631 This option enables support of hashing using SHA1 algorithm.
632 The hash is calculated in software.
633 The SHA1 algorithm produces a 160-bit (20-byte) hash value
637 bool "Enable SHA256 support in VPL"
641 This option enables support of hashing using SHA256 algorithm.
642 The hash is calculated in software.
643 The SHA256 algorithm produces a 256-bit (32-byte) hash value
648 config SHA512_HW_ACCEL
649 bool "Enable hardware acceleration for SHA512"
652 This option enables hardware acceleration for the SHA384 and SHA512
653 hashing algorithms. This affects the 'hash' command and also the
654 hash_lookup_algo() function.
656 config SHA_PROG_HW_ACCEL
657 bool "Enable Progressive hashing support using hardware"
659 This option enables hardware-acceleration for SHA progressive
661 Data can be streamed in a block at a time and the hashing is
662 performed in hardware.
667 bool "Support MD5 algorithm"
669 This option enables MD5 support. MD5 is an algorithm designed
670 in 1991 that produces a 16-byte digest (or checksum) from its input
671 data. It has a number of vulnerabilities which preclude its use in
672 security applications, but it can be useful for providing a quick
673 checksum of a block of data.
676 bool "Support MD5 algorithm in SPL"
679 This option enables MD5 support in SPL. MD5 is an algorithm designed
680 in 1991 that produces a 16-byte digest (or checksum) from its input
681 data. It has a number of vulnerabilities which preclude its use in
682 security applications, but it can be useful for providing a quick
683 checksum of a block of data.
688 Enables CRC8 support in U-Boot. This is normally required. CRC8 is
689 a simple and fast checksumming algorithm which does a bytewise
690 checksum with feedback to produce an 8-bit result. The code is small
691 and it does not require a lookup table (unlike CRC32).
694 bool "Support CRC8 in SPL"
697 Enables CRC8 support in SPL. This is not normally required. CRC8 is
698 a simple and fast checksumming algorithm which does a bytewise
699 checksum with feedback to produce an 8-bit result. The code is small
700 and it does not require a lookup table (unlike CRC32).
703 bool "Support CRC16 in SPL"
706 Enables CRC16 support in SPL. This is not normally required.
711 Enables CRC32 support in U-Boot. This is normally required.
721 menu "Compression Support"
724 bool "Enable LZ4 decompression support"
726 If this option is set, support for LZ4 compressed images
727 is included. The LZ4 algorithm can run in-place as long as the
728 compressed image is loaded to the end of the output buffer, and
729 trades lower compression ratios for much faster decompression.
731 NOTE: This implements the release version of the LZ4 frame
732 format as generated by default by the 'lz4' command line tool.
733 This is not the same as the outdated, less efficient legacy
734 frame format currently (2015) implemented in the Linux kernel
735 (generated by 'lz4 -l'). The two formats are incompatible.
738 bool "Enable LZMA decompression support"
740 This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
741 a dictionary compression algorithm that provides a high compression
742 ratio and fairly fast decompression speed. See also
743 CONFIG_CMD_LZMADEC which provides a decode command.
746 bool "Enable LZO decompression support"
748 This enables support for the LZO compression algorithm.
751 bool "Enable gzip decompression support"
755 This enables support for GZIP compression algorithm.
757 config ZLIB_UNCOMPRESS
758 bool "Enables zlib's uncompress() functionality"
760 This enables an extra zlib functionality: the uncompress() function,
761 which decompresses data from a buffer into another, knowing their
762 sizes. Unlike gunzip(), there is no header parsing.
764 config GZIP_COMPRESSED
769 bool "Enable bzip2 decompression support"
771 This enables support for BZIP2 compression algorithm.
777 This enables ZLIB compression lib.
780 bool "Enable Zstandard decompression support"
783 This enables Zstandard decompression library.
787 config ZSTD_LIB_MINIFY
788 bool "Minify Zstandard code"
791 This disables various optional components and changes the
792 compilation flags to prioritize space-saving.
794 For detailed info, see zstd's lib/README.md
796 https://github.com/facebook/zstd/blob/dev/lib/README.md
801 bool "Enable bzip2 decompression support for SPL build"
804 This enables support for bzip2 compression algorithm for SPL boot.
807 bool "Enable LZ4 decompression support in SPL"
810 This enables support for the LZ4 decompression algorithm in SPL. LZ4
811 is a lossless data compression algorithm that is focused on
812 fast compression and decompression speed. It belongs to the LZ77
813 family of byte-oriented compression schemes.
816 bool "Enable LZMA decompression support for SPL build"
819 This enables support for LZMA compression algorithm for SPL boot.
822 bool "Enable LZMA decompression support for VPL build"
825 This enables support for LZMA compression algorithm for VPL boot.
828 bool "Enable LZO decompression support in SPL"
831 This enables support for LZO compression algorithm in the SPL.
834 bool "Enable gzip decompression support for SPL build"
837 This enables support for the GZIP compression algorithm for SPL boot.
842 This enables compression lib for SPL boot.
845 bool "Enable Zstandard decompression support in SPL"
849 This enables Zstandard decompression library in the SPL.
854 bool "Enable function for getting errno-related string message"
856 The function errno_str(int errno), returns a pointer to the errno
857 corresponding text message:
858 - if errno is null or positive number - a pointer to "Success" message
859 - if errno is negative - a pointer to errno related message
862 bool "Enable hexdump"
864 This enables functions for printing dumps of binary data.
867 bool "Enable hexdump in SPL"
868 depends on SPL && HEXDUMP
870 This enables functions for printing dumps of binary data in
876 This enables functions for parsing command-line options.
879 bool "Enable the FDT library"
880 default y if OF_CONTROL
882 This enables the FDT library (libfdt). It provides functions for
883 accessing binary device tree images in memory, such as adding and
884 removing nodes and properties, scanning through the tree and finding
885 particular compatible nodes. The library operates on a flattened
886 version of the device tree.
888 config OF_LIBFDT_ASSUME_MASK
889 hex "Mask of conditions to assume for libfdt"
890 depends on OF_LIBFDT || FIT
893 Use this to change the assumptions made by libfdt about the
894 device tree it is working with. A value of 0 means that no assumptions
895 are made, and libfdt is able to deal with malicious data. A value of
896 0xff means all assumptions are made and any invalid data may cause
897 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
899 config OF_LIBFDT_OVERLAY
900 bool "Enable the FDT library overlay support"
902 default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE
904 This enables the FDT library (libfdt) overlay support.
907 hex "Maximum size of the FDT memory area passeed to the OS"
909 default 0x13000 if FMAN_ENET || QE || U_QE
912 During OS boot, we allocate a region of memory within the bootmap
913 for the FDT. This is the size that we will expand the FDT that we
914 are using will be extended to be, in bytes.
917 bool "Enable the FDT library for SPL"
918 depends on SPL_LIBGENERIC_SUPPORT
919 default y if SPL_OF_CONTROL
921 This enables the FDT library (libfdt). It provides functions for
922 accessing binary device tree images in memory, such as adding and
923 removing nodes and properties, scanning through the tree and finding
924 particular compatible nodes. The library operates on a flattened
925 version of the device tree.
927 config SPL_OF_LIBFDT_ASSUME_MASK
928 hex "Mask of conditions to assume for libfdt"
929 depends on SPL_OF_LIBFDT || (FIT && SPL)
932 Use this to change the assumptions made by libfdt in SPL about the
933 device tree it is working with. A value of 0 means that no assumptions
934 are made, and libfdt is able to deal with malicious data. A value of
935 0xff means all assumptions are made and any invalid data may cause
936 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
939 bool "Enable the FDT library for TPL"
940 depends on TPL_LIBGENERIC_SUPPORT
941 default y if TPL_OF_CONTROL
943 This enables the FDT library (libfdt). It provides functions for
944 accessing binary device tree images in memory, such as adding and
945 removing nodes and properties, scanning through the tree and finding
946 particular compatible nodes. The library operates on a flattened
947 version of the device tree.
949 config TPL_OF_LIBFDT_ASSUME_MASK
950 hex "Mask of conditions to assume for libfdt"
951 depends on TPL_OF_LIBFDT || (FIT && TPL)
954 Use this to change the assumptions made by libfdt in TPL about the
955 device tree it is working with. A value of 0 means that no assumptions
956 are made, and libfdt is able to deal with malicious data. A value of
957 0xff means all assumptions are made and any invalid data may cause
958 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
961 bool "Enable the FDT library for VPL"
963 default y if VPL_OF_CONTROL && !VPL_OF_PLATDATA
965 This enables the FDT library (libfdt). It provides functions for
966 accessing binary device tree images in memory, such as adding and
967 removing nodes and properties, scanning through the tree and finding
968 particular compatible nodes. The library operates on a flattened
969 version of the device tree.
971 config VPL_OF_LIBFDT_ASSUME_MASK
972 hex "Mask of conditions to assume for libfdt"
973 depends on VPL_OF_LIBFDT || (FIT && VPL)
976 Use this to change the assumptions made by libfdt in SPL about the
977 device tree it is working with. A value of 0 means that no assumptions
978 are made, and libfdt is able to deal with malicious data. A value of
979 0xff means all assumptions are made and any invalid data may cause
980 unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
983 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
985 config BLOBLIST_TABLES
986 bool "Put tables in a bloblist"
987 depends on X86 && BLOBLIST
989 Normally tables are placed at address 0xf0000 and can be up to 64KB
990 long. With this option, tables are instead placed in the bloblist
991 with a pointer from 0xf0000. The size can then be larger and the
992 tables can be placed high in memory.
994 config GENERATE_SMBIOS_TABLE
995 bool "Generate an SMBIOS (System Management BIOS) table"
999 The System Management BIOS (SMBIOS) specification addresses how
1000 motherboard and system vendors present management information about
1001 their products in a standard format by extending the BIOS interface
1002 on Intel architecture systems.
1004 Check http://www.dmtf.org/standards/smbios for details.
1006 See also SYSINFO_SMBIOS which allows SMBIOS values to be provided in
1012 bool "enable continued fraction calculation routines"
1014 config SPL_LIB_RATIONAL
1015 bool "enable continued fraction calculation routines for SPL"
1018 config ASN1_COMPILER
1021 ASN.1 (Abstract Syntax Notation One) is a standard interface
1022 description language for defining data structures that can be
1023 serialized and deserialized in a cross-platform way. It is
1024 broadly used in telecommunications and computer networking,
1025 and especially in cryptography (https://en.wikipedia.org/wiki/ASN.1).
1026 This option enables the support of the asn1 compiler.
1031 ASN.1 (Abstract Syntax Notation One) is a standard interface
1032 description language for defining data structures that can be
1033 serialized and deserialized in a cross-platform way. It is
1034 broadly used in telecommunications and computer networking,
1035 and especially in cryptography (https://en.wikipedia.org/wiki/ASN.1).
1036 This option enables the support of the asn1 decoder.
1038 config SPL_ASN1_DECODER
1041 ASN.1 (Abstract Syntax Notation One) is a standard interface
1042 description language for defining data structures that can be
1043 serialized and deserialized in a cross-platform way. It is
1044 broadly used in telecommunications and computer networking,
1045 and especially in cryptography (https://en.wikipedia.org/wiki/ASN.1).
1046 This option enables the support of the asn1 decoder in the SPL.
1051 In computing, object identifiers or OIDs are an identifier mechanism
1052 standardized by the International Telecommunication Union (ITU) and
1053 ISO/IEC for naming any object, concept, or "thing" with a globally
1054 unambiguous persistent name (https://en.wikipedia.org/wiki/Object_identifier).
1055 Enable fast lookup object identifier registry.
1057 config SPL_OID_REGISTRY
1060 In computing, object identifiers or OIDs are an identifier mechanism
1061 standardized by the International Telecommunication Union (ITU) and
1062 ISO/IEC for naming any object, concept, or "thing" with a globally
1063 unambiguous persistent name (https://en.wikipedia.org/wiki/Object_identifier).
1064 Enable fast lookup object identifier registry in the SPL.
1067 bool "SMBIOS support"
1068 depends on X86 || EFI_LOADER
1070 select LAST_STAGE_INIT
1072 Indicates that this platform can support System Management BIOS
1073 (SMBIOS) tables. These provide various pieces of information about
1074 the board, such as the manufacturer and the model name.
1076 See GENERATE_SMBIOS_TABLE which controls whether U-Boot actually
1077 creates these tables, rather than them coming from a previous firmware
1080 config SMBIOS_PARSER
1081 bool "SMBIOS parser"
1083 A simple parser for SMBIOS data.
1085 source "lib/optee/Kconfig"
1088 bool "enable fdtdec test"
1089 depends on OF_LIBFDT
1097 Support basic elf loading/validating functions.
1098 This supports for 32 bit and 64 bit versions.
1101 bool "Enable the logical memory blocks library (lmb)"
1102 default y if ARC || ARM || M68K || MICROBLAZE || MIPS || \
1103 NIOS2 || PPC || RISCV || SANDBOX || SH || X86 || XTENSA
1104 select ARCH_MISC_INIT if PPC
1106 Support the library logical memory blocks. This will require
1107 a malloc() implementation for defining the data structures
1108 needed for maintaining the LMB memory map.
1111 bool "Enable LMB module for SPL"
1112 depends on SPL && SPL_FRAMEWORK && SPL_SYS_MALLOC
1114 Enable support for Logical Memory Block library routines in
1115 SPL. This will require a malloc() implementation for defining
1116 the data structures needed for maintaining the LMB memory map.
1118 config PHANDLE_CHECK_SEQ
1119 bool "Enable phandle check while getting sequence number"
1121 When there are multiple device tree nodes with same name,
1122 enable this config option to distinguish them using
1123 phandles in fdtdec_get_alias_seq() function.
1127 source "lib/fwu_updates/Kconfig"