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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_PRIVATE_LIBGCC
bool
config LIB_UUID
bool
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"
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 n if ARCH_SUNXI
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 envrionments 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 envrionments 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"
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.
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
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 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.
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 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"
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 FDT_FIXUP_PARTITIONS
bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
depends on OF_LIBFDT
default n
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
endmenu
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