| menu "Library routines" |
| |
| config BCH |
| bool "Enable Software based BCH ECC" |
| help |
| Enables software based BCH ECC algorithm present in lib/bch.c |
| This is used by SoC platforms which do not have built-in ELM |
| hardware engine required for BCH ECC correction. |
| |
| config CC_OPTIMIZE_LIBS_FOR_SPEED |
| bool "Optimize libraries for speed" |
| help |
| Enabling this option will pass "-O2" to gcc when compiling |
| under "lib" directory. |
| |
| If unsure, say N. |
| |
| config DYNAMIC_CRC_TABLE |
| bool "Enable Dynamic tables for CRC" |
| help |
| Enable this option to calculate entries for CRC tables at runtime. |
| This can be helpful when reducing the size of the build image |
| |
| config HAVE_ARCH_IOMAP |
| bool |
| help |
| Enable this option if architecture provides io{read,write}{8,16,32} |
| I/O accessor functions. |
| |
| config HAVE_PRIVATE_LIBGCC |
| bool |
| |
| config LIB_UUID |
| bool |
| |
| config PRINTF |
| bool |
| default y |
| |
| config SPL_PRINTF |
| bool |
| select SPL_SPRINTF |
| select SPL_STRTO if !USE_TINY_PRINTF |
| |
| config TPL_PRINTF |
| bool |
| select TPL_SPRINTF |
| select TPL_STRTO if !USE_TINY_PRINTF |
| |
| config SPRINTF |
| bool |
| default y |
| |
| config SPL_SPRINTF |
| bool |
| |
| config TPL_SPRINTF |
| bool |
| |
| config STRTO |
| bool |
| default y |
| |
| config SPL_STRTO |
| bool |
| |
| config TPL_STRTO |
| bool |
| |
| config IMAGE_SPARSE |
| bool |
| |
| config IMAGE_SPARSE_FILLBUF_SIZE |
| hex "Android sparse image CHUNK_TYPE_FILL buffer size" |
| default 0x80000 |
| depends on IMAGE_SPARSE |
| help |
| Set the size of the fill buffer used when processing CHUNK_TYPE_FILL |
| chunks. |
| |
| config USE_PRIVATE_LIBGCC |
| bool "Use private libgcc" |
| depends on HAVE_PRIVATE_LIBGCC |
| default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS) |
| help |
| This option allows you to use the built-in libgcc implementation |
| of U-Boot instead of the one provided by the compiler. |
| If unsure, say N. |
| |
| config SYS_HZ |
| int |
| default 1000 |
| help |
| The frequency of the timer returned by get_timer(). |
| get_timer() must operate in milliseconds and this option must be |
| set to 1000. |
| |
| config USE_TINY_PRINTF |
| bool "Enable tiny printf() version" |
| depends on SPL || TPL |
| default y |
| help |
| This option enables a tiny, stripped down printf version. |
| This should only be used in space limited environments, |
| like SPL versions with hard memory limits. This version |
| reduces the code size by about 2.5KiB on armv7. |
| |
| The supported format specifiers are %c, %s, %u/%d and %x. |
| |
| config PANIC_HANG |
| bool "Do not reset the system on fatal error" |
| help |
| Define this option to stop the system in case of a fatal error, |
| so that you have to reset it manually. This is probably NOT a good |
| idea for an embedded system where you want the system to reboot |
| automatically as fast as possible, but it may be useful during |
| development since you can try to debug the conditions that lead to |
| the situation. |
| |
| config REGEX |
| bool "Enable regular expression support" |
| default y if NET |
| help |
| If this variable is defined, U-Boot is linked against the |
| SLRE (Super Light Regular Expression) library, which adds |
| regex support to some commands, for example "env grep" and |
| "setexpr". |
| |
| choice |
| prompt "Pseudo-random library support type" |
| depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID |
| default LIB_RAND |
| help |
| Select the library to provide pseudo-random number generator |
| functions. LIB_HW_RAND supports certain hardware engines that |
| provide this functionality. If in doubt, select LIB_RAND. |
| |
| config LIB_RAND |
| bool "Pseudo-random library support" |
| |
| config LIB_HW_RAND |
| bool "HW Engine for random libray support" |
| |
| endchoice |
| |
| config SPL_TINY_MEMSET |
| bool "Use a very small memset() in SPL" |
| help |
| The faster memset() is the arch-specific one (if available) enabled |
| by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get |
| better performance by writing a word at a time. But in very |
| size-constrained environments even this may be too big. Enable this |
| option to reduce code size slightly at the cost of some speed. |
| |
| config TPL_TINY_MEMSET |
| bool "Use a very small memset() in TPL" |
| help |
| The faster memset() is the arch-specific one (if available) enabled |
| by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get |
| better performance by writing a word at a time. But in very |
| size-constrained environments even this may be too big. Enable this |
| option to reduce code size slightly at the cost of some speed. |
| |
| config RBTREE |
| bool |
| |
| config BITREVERSE |
| bool "Bit reverse library from Linux" |
| |
| config TRACE |
| bool "Support for tracing of function calls and timing" |
| imply CMD_TRACE |
| help |
| Enables function tracing within U-Boot. This allows recording of call |
| traces including timing information. The command can write data to |
| memory for exporting for analysis (e.g. using bootchart). |
| See doc/README.trace for full details. |
| |
| config TRACE_BUFFER_SIZE |
| hex "Size of trace buffer in U-Boot" |
| depends on TRACE |
| default 0x01000000 |
| help |
| Sets the size of the trace buffer in U-Boot. This is allocated from |
| memory during relocation. If this buffer is too small, the trace |
| history will be truncated, with later records omitted. |
| |
| If early trace is enabled (i.e. before relocation), this buffer must |
| be large enough to include all the data from the early trace buffer as |
| well, since this is copied over to the main buffer during relocation. |
| |
| A trace record is emitted for each function call and each record is |
| 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If |
| the size is too small then 'trace stats' will show a message saying |
| how many records were dropped due to buffer overflow. |
| |
| config TRACE_CALL_DEPTH_LIMIT |
| int "Trace call depth limit" |
| depends on TRACE |
| default 15 |
| help |
| Sets the maximum call depth up to which function calls are recorded. |
| |
| config TRACE_EARLY |
| bool "Enable tracing before relocation" |
| depends on TRACE |
| help |
| Sometimes it is helpful to trace execution of U-Boot before |
| relocation. This is possible by using a arch-specific, fixed buffer |
| position in memory. Enable this option to start tracing as early as |
| possible after U-Boot starts. |
| |
| config TRACE_EARLY_SIZE |
| hex "Size of early trace buffer in U-Boot" |
| depends on TRACE_EARLY |
| default 0x00100000 |
| help |
| Sets the size of the early trace buffer in bytes. This is used to hold |
| tracing information before relocation. |
| |
| config TRACE_EARLY_CALL_DEPTH_LIMIT |
| int "Early trace call depth limit" |
| depends on TRACE_EARLY |
| default 200 |
| help |
| Sets the maximum call depth up to which function calls are recorded |
| during early tracing. |
| |
| config TRACE_EARLY_ADDR |
| hex "Address of early trace buffer in U-Boot" |
| depends on TRACE_EARLY |
| default 0x00100000 |
| help |
| Sets the address of the early trace buffer in U-Boot. This memory |
| must be accessible before relocation. |
| |
| A trace record is emitted for each function call and each record is |
| 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If |
| the size is too small then the message which says the amount of early |
| data being coped will the the same as the |
| |
| source lib/dhry/Kconfig |
| |
| menu "Security support" |
| |
| config AES |
| bool "Support the AES algorithm" |
| help |
| This provides a means to encrypt and decrypt data using the AES |
| (Advanced Encryption Standard). This algorithm uses a symetric key |
| and is widely used as a streaming cipher. Different key lengths are |
| supported by the algorithm but only a 128-bit key is supported at |
| present. |
| |
| source lib/rsa/Kconfig |
| |
| config TPM |
| bool "Trusted Platform Module (TPM) Support" |
| depends on DM |
| help |
| This enables support for TPMs which can be used to provide security |
| features for your board. The TPM can be connected via LPC or I2C |
| and a sandbox TPM is provided for testing purposes. Use the 'tpm' |
| command to interactive the TPM. Driver model support is provided |
| for the low-level TPM interface, but only one TPM is supported at |
| a time by the TPM library. |
| |
| config SPL_TPM |
| bool "Trusted Platform Module (TPM) Support in SPL" |
| depends on SPL_DM |
| help |
| This enables support for TPMs which can be used to provide security |
| features for your board. The TPM can be connected via LPC or I2C |
| and a sandbox TPM is provided for testing purposes. Use the 'tpm' |
| command to interactive the TPM. Driver model support is provided |
| for the low-level TPM interface, but only one TPM is supported at |
| a time by the TPM library. |
| |
| config TPL_TPM |
| bool "Trusted Platform Module (TPM) Support in TPL" |
| depends on TPL_DM |
| help |
| This enables support for TPMs which can be used to provide security |
| features for your board. The TPM can be connected via LPC or I2C |
| and a sandbox TPM is provided for testing purposes. Use the 'tpm' |
| command to interactive the TPM. Driver model support is provided |
| for the low-level TPM interface, but only one TPM is supported at |
| a time by the TPM library. |
| |
| endmenu |
| |
| menu "Android Verified Boot" |
| |
| config LIBAVB |
| bool "Android Verified Boot 2.0 support" |
| depends on ANDROID_BOOT_IMAGE |
| default n |
| help |
| This enables support of Android Verified Boot 2.0 which can be used |
| to assure the end user of the integrity of the software running on a |
| device. Introduces such features as boot chain of trust, rollback |
| protection etc. |
| |
| endmenu |
| |
| menu "Hashing Support" |
| |
| config SHA1 |
| bool "Enable SHA1 support" |
| help |
| This option enables support of hashing using SHA1 algorithm. |
| The hash is calculated in software. |
| The SHA1 algorithm produces a 160-bit (20-byte) hash value |
| (digest). |
| |
| config SHA256 |
| bool "Enable SHA256 support" |
| help |
| This option enables support of hashing using SHA256 algorithm. |
| The hash is calculated in software. |
| The SHA256 algorithm produces a 256-bit (32-byte) hash value |
| (digest). |
| |
| config SHA_HW_ACCEL |
| bool "Enable hashing using hardware" |
| help |
| This option enables hardware acceleration |
| for SHA1/SHA256 hashing. |
| This affects the 'hash' command and also the |
| hash_lookup_algo() function. |
| |
| config SHA_PROG_HW_ACCEL |
| bool "Enable Progressive hashing support using hardware" |
| depends on SHA_HW_ACCEL |
| help |
| This option enables hardware-acceleration for |
| SHA1/SHA256 progressive hashing. |
| Data can be streamed in a block at a time and the hashing |
| is performed in hardware. |
| |
| config MD5 |
| bool |
| |
| config CRC32C |
| bool |
| |
| config XXHASH |
| bool |
| |
| endmenu |
| |
| menu "Compression Support" |
| |
| config LZ4 |
| bool "Enable LZ4 decompression support" |
| help |
| If this option is set, support for LZ4 compressed images |
| is included. The LZ4 algorithm can run in-place as long as the |
| compressed image is loaded to the end of the output buffer, and |
| trades lower compression ratios for much faster decompression. |
| |
| NOTE: This implements the release version of the LZ4 frame |
| format as generated by default by the 'lz4' command line tool. |
| This is not the same as the outdated, less efficient legacy |
| frame format currently (2015) implemented in the Linux kernel |
| (generated by 'lz4 -l'). The two formats are incompatible. |
| |
| config LZMA |
| bool "Enable LZMA decompression support" |
| help |
| This enables support for LZMA (Lempel-Ziv-Markov chain algorithm), |
| a dictionary compression algorithm that provides a high compression |
| ratio and fairly fast decompression speed. See also |
| CONFIG_CMD_LZMADEC which provides a decode command. |
| |
| config LZO |
| bool "Enable LZO decompression support" |
| help |
| This enables support for LZO compression algorithm.r |
| |
| config GZIP |
| bool "Enable gzip decompression support" |
| select ZLIB |
| default y |
| help |
| This enables support for GZIP compression algorithm. |
| |
| config ZLIB |
| bool |
| default y |
| help |
| This enables ZLIB compression lib. |
| |
| config ZSTD |
| bool "Enable Zstandard decompression support" |
| select XXHASH |
| help |
| This enables Zstandard decompression library. |
| |
| config SPL_LZ4 |
| bool "Enable LZ4 decompression support in SPL" |
| help |
| This enables support for tge LZ4 decompression algorithm in SPL. LZ4 |
| is a lossless data compression algorithm that is focused on |
| fast compression and decompression speed. It belongs to the LZ77 |
| family of byte-oriented compression schemes. |
| |
| config SPL_LZO |
| bool "Enable LZO decompression support in SPL" |
| help |
| This enables support for LZO compression algorithm in the SPL. |
| |
| config SPL_GZIP |
| bool "Enable gzip decompression support for SPL build" |
| select SPL_ZLIB |
| help |
| This enables support for GZIP compression altorithm for SPL boot. |
| |
| config SPL_ZLIB |
| bool |
| help |
| This enables compression lib for SPL boot. |
| |
| config SPL_ZSTD |
| bool "Enable Zstandard decompression support in SPL" |
| select XXHASH |
| help |
| This enables Zstandard decompression library in the SPL. |
| |
| endmenu |
| |
| config ERRNO_STR |
| bool "Enable function for getting errno-related string message" |
| help |
| The function errno_str(int errno), returns a pointer to the errno |
| corresponding text message: |
| - if errno is null or positive number - a pointer to "Success" message |
| - if errno is negative - a pointer to errno related message |
| |
| config HEXDUMP |
| bool "Enable hexdump" |
| help |
| This enables functions for printing dumps of binary data. |
| |
| config OF_LIBFDT |
| bool "Enable the FDT library" |
| default y if OF_CONTROL |
| help |
| This enables the FDT library (libfdt). It provides functions for |
| accessing binary device tree images in memory, such as adding and |
| removing nodes and properties, scanning through the tree and finding |
| particular compatible nodes. The library operates on a flattened |
| version of the device tree. |
| |
| config OF_LIBFDT_OVERLAY |
| bool "Enable the FDT library overlay support" |
| depends on OF_LIBFDT |
| default y if ARCH_OMAP2PLUS || ARCH_KEYSTONE |
| help |
| This enables the FDT library (libfdt) overlay support. |
| |
| config SPL_OF_LIBFDT |
| bool "Enable the FDT library for SPL" |
| default y if SPL_OF_CONTROL |
| help |
| This enables the FDT library (libfdt). It provides functions for |
| accessing binary device tree images in memory, such as adding and |
| removing nodes and properties, scanning through the tree and finding |
| particular compatible nodes. The library operates on a flattened |
| version of the device tree. |
| |
| config TPL_OF_LIBFDT |
| bool "Enable the FDT library for TPL" |
| default y if TPL_OF_CONTROL |
| help |
| This enables the FDT library (libfdt). It provides functions for |
| accessing binary device tree images in memory, such as adding and |
| removing nodes and properties, scanning through the tree and finding |
| particular compatible nodes. The library operates on a flattened |
| version of the device tree. |
| |
| config FDT_FIXUP_PARTITIONS |
| bool "overwrite MTD partitions in DTS through defined in 'mtdparts'" |
| depends on OF_LIBFDT |
| depends on CMD_MTDPARTS |
| help |
| Allow overwriting defined partitions in the device tree blob |
| using partition info defined in the 'mtdparts' environment |
| variable. |
| |
| menu "System tables" |
| depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER) |
| |
| config GENERATE_SMBIOS_TABLE |
| bool "Generate an SMBIOS (System Management BIOS) table" |
| default y |
| depends on X86 || EFI_LOADER |
| help |
| The System Management BIOS (SMBIOS) specification addresses how |
| motherboard and system vendors present management information about |
| their products in a standard format by extending the BIOS interface |
| on Intel architecture systems. |
| |
| Check http://www.dmtf.org/standards/smbios for details. |
| |
| config SMBIOS_MANUFACTURER |
| string "SMBIOS Manufacturer" |
| depends on GENERATE_SMBIOS_TABLE |
| default SYS_VENDOR |
| help |
| The board manufacturer to store in SMBIOS structures. |
| Change this to override the default one (CONFIG_SYS_VENDOR). |
| |
| config SMBIOS_PRODUCT_NAME |
| string "SMBIOS Product Name" |
| depends on GENERATE_SMBIOS_TABLE |
| default SYS_BOARD |
| help |
| The product name to store in SMBIOS structures. |
| Change this to override the default one (CONFIG_SYS_BOARD). |
| |
| endmenu |
| |
| source lib/efi/Kconfig |
| source lib/efi_loader/Kconfig |
| source lib/optee/Kconfig |
| |
| config TEST_FDTDEC |
| bool "enable fdtdec test" |
| depends on OF_LIBFDT |
| |
| endmenu |
