menu "Library routines"
config ADDR_MAP
bool "Enable support for non-identity virtual-physical mappings"
help
Enables helper code for implementing non-identity virtual-physical
memory mappings for 32bit CPUs.
This library only works in the post-relocation phase.
config SYS_NUM_ADDR_MAP
int "Size of the address-map table"
depends on ADDR_MAP
default 16
help
Sets the number of entries in the virtual-physical mapping table.
config SYS_TIMER_COUNTS_DOWN
bool "System timer counts down rather than up"
config PHYSMEM
bool "Access to physical memory region (> 4G)"
help
Some basic support is provided for operations on memory not
normally accessible to 32-bit U-Boot - e.g. some architectures
support access to more than 4G of memory on 32-bit
machines using physical address extension or similar.
Enable this to access this basic support, which only supports clearing
the memory.
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 BINMAN_FDT
bool "Allow access to binman information in the device tree"
depends on BINMAN && DM && OF_CONTROL
default y if OF_SEPARATE || OF_EMBED
help
This enables U-Boot to access information about binman entries,
stored in the device tree in a binman node. Typical uses are to
locate entries in the firmware image. See binman.h for the available
functionality.
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 CHARSET
bool
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 SPL_LIB_UUID
depends on SPL
bool
config SEMIHOSTING
bool "Support semihosting"
depends on ARM || RISCV
help
Semihosting is a method for a target to communicate with a host
debugger. It uses special instructions which the debugger will trap
on and interpret. This allows U-Boot to read/write files, print to
the console, and execute arbitrary commands on the host system.
Enabling this option will add support for reading and writing files
on the host system. If you don't have a debugger attached then trying
to do this will likely cause U-Boot to hang. Say 'n' if you are unsure.
config SEMIHOSTING_FALLBACK
bool "Recover gracefully when semihosting fails"
depends on SEMIHOSTING && (ARM64 || RISCV)
default y
help
Normally, if U-Boot makes a semihosting call and no debugger is
attached, then it will panic due to a synchronous abort
exception. This config adds an exception handler which will allow
U-Boot to recover. Say 'y' if unsure.
config SPL_SEMIHOSTING
bool "Support semihosting in SPL"
depends on SPL && (ARM || RISCV)
help
Semihosting is a method for a target to communicate with a host
debugger. It uses special instructions which the debugger will trap
on and interpret. This allows U-Boot to read/write files, print to
the console, and execute arbitrary commands on the host system.
Enabling this option will add support for reading and writing files
on the host system. If you don't have a debugger attached then trying
to do this will likely cause U-Boot to hang. Say 'n' if you are unsure.
config SPL_SEMIHOSTING_FALLBACK
bool "Recover gracefully when semihosting fails in SPL"
depends on SPL_SEMIHOSTING && (ARM64 || RISCV)
select ARMV8_SPL_EXCEPTION_VECTORS if ARM64
default y
help
Normally, if U-Boot makes a semihosting call and no debugger is
attached, then it will panic due to a synchronous abort
exception. This config adds an exception handler which will allow
U-Boot to recover. Say 'y' if unsure.
config PRINTF
bool
default y
config SPL_PRINTF
bool
select SPL_SPRINTF
select SPL_STRTO if !SPL_USE_TINY_PRINTF
config TPL_PRINTF
bool
select TPL_SPRINTF
select TPL_STRTO if !TPL_USE_TINY_PRINTF
config VPL_PRINTF
bool
select VPL_SPRINTF
select VPL_STRTO if !VPL_USE_TINY_PRINTF
config SPRINTF
bool
default y
config SPL_SPRINTF
bool
config TPL_SPRINTF
bool
config VPL_SPRINTF
bool
config SSCANF
bool
config STRTO
bool
default y
config SPL_STRTO
bool
config TPL_STRTO
bool
config VPL_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 SPL_USE_TINY_PRINTF
bool "Enable tiny printf() version in SPL"
depends on SPL
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 TPL_USE_TINY_PRINTF
bool "Enable tiny printf() version in TPL"
depends on TPL
default y if SPL_USE_TINY_PRINTF
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 VPL_USE_TINY_PRINTF
bool "Enable tiny printf() version for VPL"
depends on VPL
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 || \
RNG_SANDBOX || UT_LIB && AES || FAT_WRITE
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 library support"
endchoice
config SUPPORT_ACPI
bool
help
Enable this if your arch or board can support generating ACPI
(Advanced Configuration and Power Interface) tables. In this case
U-Boot can generate these tables and pass them to the Operating
System.
config ACPI
bool "Enable support for ACPI libraries"
depends on SUPPORT_ACPI
help
Provides library functions for dealing with ACPI tables. This does
not necessarily include generation of tables
(see GENERATE_ACPI_TABLE), but allows for tables to be located.
config SPL_ACPI
bool "Enable support for ACPI libraries in SPL"
depends on SPL && SUPPORT_ACPI
help
Provides library functions for dealing with ACPI tables in SPL. This
does not necessarily include generation of tables
(see GENERATE_ACPI_TABLE), but allows for tables to be located.
config GENERATE_ACPI_TABLE
bool "Generate an ACPI (Advanced Configuration and Power Interface) table"
depends on ACPI
select QFW if QEMU
help
The Advanced Configuration and Power Interface (ACPI) specification
provides an open standard for device configuration and management
by the operating system. It defines platform-independent interfaces
for configuration and power management monitoring.
config SPL_TINY_MEMSET
bool "Use a very small memset() in SPL"
depends on 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"
depends on 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
imply TIMER_EARLY
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 15
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
config CIRCBUF
bool "Enable circular buffer support"
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/ecdsa/Kconfig
source lib/rsa/Kconfig
source lib/crypto/Kconfig
source lib/crypt/Kconfig
config TPM
bool "Trusted Platform Module (TPM) Support"
depends on DM
imply DM_RNG
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
imply SPL_CRC8
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.
config VPL_TPM
bool "Trusted Platform Module (TPM) Support in VPL"
depends on VPL_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
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 BLAKE2
bool "Enable BLAKE2 support"
help
This option enables support of hashing using BLAKE2B algorithm.
The hash is calculated in software.
The BLAKE2 algorithm produces a hash value (digest) between 1 and
64 bytes.
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 SHA512
bool "Enable SHA512 support"
default y if TI_SECURE_DEVICE && FIT_SIGNATURE
help
This option enables support of hashing using SHA512 algorithm.
The hash is calculated in software.
The SHA512 algorithm produces a 512-bit (64-byte) hash value
(digest).
config SHA384
bool "Enable SHA384 support"
select SHA512
help
This option enables support of hashing using SHA384 algorithm.
The hash is calculated in software. This is also selects SHA512,
because these implementations share the bulk of the code..
The SHA384 algorithm produces a 384-bit (48-byte) hash value
(digest).
config SHA_HW_ACCEL
bool "Enable hardware acceleration for SHA hash functions"
help
This option enables hardware acceleration for the SHA1 and SHA256
hashing algorithms. This affects the 'hash' command and also the
hash_lookup_algo() function.
if SPL
config SPL_CRC32
bool "Enable CRC32 support in SPL"
default y if SPL_LEGACY_IMAGE_SUPPORT || SPL_EFI_PARTITION
default y if SPL_ENV_SUPPORT || TPL_BLOBLIST
help
This option enables support of hashing using CRC32 algorithm.
The CRC32 algorithm produces 32-bit checksum value. For FIT
images, this is the least secure type of checksum, suitable for
detected accidental image corruption. For secure applications you
should consider SHA256 or SHA384.
config SPL_SHA1
bool "Enable SHA1 support in SPL"
default y if SHA1
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 SPL_SHA256
bool "Enable SHA256 support in SPL"
default y if SHA256
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 SPL_SHA512
bool "Enable SHA512 support in SPL"
default y if SHA512
help
This option enables support of hashing using SHA512 algorithm.
The hash is calculated in software.
The SHA512 algorithm produces a 512-bit (64-byte) hash value
(digest).
config SPL_SHA384
bool "Enable SHA384 support in SPL"
default y if SHA384
select SPL_SHA512
help
This option enables support of hashing using SHA384 algorithm.
The hash is calculated in software. This is also selects SHA512,
because these implementations share the bulk of the code..
The SHA384 algorithm produces a 384-bit (48-byte) hash value
(digest).
config SPL_SHA_HW_ACCEL
bool "Enable hardware acceleration for SHA hash functions"
default y if SHA_HW_ACCEL
help
This option enables hardware acceleration for the SHA1 and SHA256
hashing algorithms. This affects the 'hash' command and also the
hash_lookup_algo() function.
config SPL_SHA_PROG_HW_ACCEL
bool "Enable Progressive hashing support using hardware in SPL"
depends on SHA_PROG_HW_ACCEL
default y
help
This option enables hardware-acceleration for SHA progressive
hashing.
Data can be streamed in a block at a time and the hashing is
performed in hardware.
endif
config VPL_SHA1
bool "Enable SHA1 support in VPL"
depends on VPL
default y if SHA1
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 VPL_SHA256
bool "Enable SHA256 support in VPL"
depends on VPL
default y if SHA256
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).
if SHA_HW_ACCEL
config SHA512_HW_ACCEL
bool "Enable hardware acceleration for SHA512"
depends on SHA512
help
This option enables hardware acceleration for the SHA384 and SHA512
hashing algorithms. This affects the 'hash' command and also the
hash_lookup_algo() function.
config SHA_PROG_HW_ACCEL
bool "Enable Progressive hashing support using hardware"
help
This option enables hardware-acceleration for SHA progressive
hashing.
Data can be streamed in a block at a time and the hashing is
performed in hardware.
endif
config MD5
bool "Support MD5 algorithm"
help
This option enables MD5 support. MD5 is an algorithm designed
in 1991 that produces a 16-byte digest (or checksum) from its input
data. It has a number of vulnerabilities which preclude its use in
security applications, but it can be useful for providing a quick
checksum of a block of data.
config SPL_MD5
bool "Support MD5 algorithm in SPL"
depends on SPL
help
This option enables MD5 support in SPL. MD5 is an algorithm designed
in 1991 that produces a 16-byte digest (or checksum) from its input
data. It has a number of vulnerabilities which preclude its use in
security applications, but it can be useful for providing a quick
checksum of a block of data.
config CRC8
def_bool y
help
Enables CRC8 support in U-Boot. This is normally required. CRC8 is
a simple and fast checksumming algorithm which does a bytewise
checksum with feedback to produce an 8-bit result. The code is small
and it does not require a lookup table (unlike CRC32).
config SPL_CRC8
bool "Support CRC8 in SPL"
depends on SPL
help
Enables CRC8 support in SPL. This is not normally required. CRC8 is
a simple and fast checksumming algorithm which does a bytewise
checksum with feedback to produce an 8-bit result. The code is small
and it does not require a lookup table (unlike CRC32).
config CRC32
def_bool y
help
Enables CRC32 support in U-Boot. This is normally required.
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 the LZO compression algorithm.
config GZIP
bool "Enable gzip decompression support"
select ZLIB
default y
help
This enables support for GZIP compression algorithm.
config ZLIB_UNCOMPRESS
bool "Enables zlib's uncompress() functionality"
help
This enables an extra zlib functionality: the uncompress() function,
which decompresses data from a buffer into another, knowing their
sizes. Unlike gunzip(), there is no header parsing.
config GZIP_COMPRESSED
bool
select ZLIB
config BZIP2
bool "Enable bzip2 decompression support"
help
This enables support for BZIP2 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.
if ZSTD
config ZSTD_LIB_MINIFY
bool "Minify Zstandard code"
default y
help
This disables various optional components and changes the
compilation flags to prioritize space-saving.
For detailed info, see zstd's lib/README.md
https://github.com/facebook/zstd/blob/dev/lib/README.md
endif
config SPL_BZIP2
bool "Enable bzip2 decompression support for SPL build"
depends on SPL
help
This enables support for bzip2 compression algorithm for SPL boot.
config SPL_LZ4
bool "Enable LZ4 decompression support in SPL"
depends on SPL
help
This enables support for the 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_LZMA
bool "Enable LZMA decompression support for SPL build"
depends on SPL
help
This enables support for LZMA compression algorithm for SPL boot.
config VPL_LZMA
bool "Enable LZMA decompression support for VPL build"
default y if LZMA
help
This enables support for LZMA compression algorithm for VPL boot.
config SPL_LZO
bool "Enable LZO decompression support in SPL"
depends on 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 the GZIP compression algorithm 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"
depends on 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 SPL_HEXDUMP
bool "Enable hexdump in SPL"
depends on SPL && HEXDUMP
help
This enables functions for printing dumps of binary data in
SPL.
config GETOPT
bool "Enable getopt"
help
This enables functions for parsing command-line options.
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_ASSUME_MASK
hex "Mask of conditions to assume for libfdt"
depends on OF_LIBFDT || FIT
default 0x0
help
Use this to change the assumptions made by libfdt about the
device tree it is working with. A value of 0 means that no assumptions
are made, and libfdt is able to deal with malicious data. A value of
0xff means all assumptions are made and any invalid data may cause
unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
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 SYS_FDT_PAD
hex "Maximum size of the FDT memory area passeed to the OS"
depends on OF_LIBFDT
default 0x13000 if FMAN_ENET || QE || U_QE
default 0x3000
help
During OS boot, we allocate a region of memory within the bootmap
for the FDT. This is the size that we will expand the FDT that we
are using will be extended to be, in bytes.
config SPL_OF_LIBFDT
bool "Enable the FDT library for SPL"
depends on SPL_LIBGENERIC_SUPPORT
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 SPL_OF_LIBFDT_ASSUME_MASK
hex "Mask of conditions to assume for libfdt"
depends on SPL_OF_LIBFDT || (FIT && SPL)
default 0xff
help
Use this to change the assumptions made by libfdt in SPL about the
device tree it is working with. A value of 0 means that no assumptions
are made, and libfdt is able to deal with malicious data. A value of
0xff means all assumptions are made and any invalid data may cause
unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
config TPL_OF_LIBFDT
bool "Enable the FDT library for TPL"
depends on TPL_LIBGENERIC_SUPPORT
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 TPL_OF_LIBFDT_ASSUME_MASK
hex "Mask of conditions to assume for libfdt"
depends on TPL_OF_LIBFDT || (FIT && TPL)
default 0xff
help
Use this to change the assumptions made by libfdt in TPL about the
device tree it is working with. A value of 0 means that no assumptions
are made, and libfdt is able to deal with malicious data. A value of
0xff means all assumptions are made and any invalid data may cause
unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
config VPL_OF_LIBFDT
bool "Enable the FDT library for VPL"
depends on VPL
default y if VPL_OF_CONTROL && !VPL_OF_PLATDATA
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 VPL_OF_LIBFDT_ASSUME_MASK
hex "Mask of conditions to assume for libfdt"
depends on VPL_OF_LIBFDT || (FIT && VPL)
default 0xff
help
Use this to change the assumptions made by libfdt in SPL about the
device tree it is working with. A value of 0 means that no assumptions
are made, and libfdt is able to deal with malicious data. A value of
0xff means all assumptions are made and any invalid data may cause
unsafe execution. See FDT_ASSUME_PERFECT, etc. in libfdt_internal.h
menu "System tables"
depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
config BLOBLIST_TABLES
bool "Put tables in a bloblist"
depends on X86 && BLOBLIST
help
Normally tables are placed at address 0xf0000 and can be up to 64KB
long. With this option, tables are instead placed in the bloblist
with a pointer from 0xf0000. The size can then be larger and the
tables can be placed high in memory.
config GENERATE_SMBIOS_TABLE
bool "Generate an SMBIOS (System Management BIOS) table"
depends on SMBIOS
default y
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.
See also SMBIOS_SYSINFO which allows SMBIOS values to be provided in
the devicetree.
endmenu
config LIB_RATIONAL
bool "enable continued fraction calculation routines"
config SPL_LIB_RATIONAL
bool "enable continued fraction calculation routines for SPL"
depends on SPL
config ASN1_COMPILER
bool
help
ASN.1 (Abstract Syntax Notation One) is a standard interface
description language for defining data structures that can be
serialized and deserialized in a cross-platform way. It is
broadly used in telecommunications and computer networking,
and especially in cryptography (https://en.wikipedia.org/wiki/ASN.1).
This option enables the support of the asn1 compiler.
config ASN1_DECODER
bool
help
ASN.1 (Abstract Syntax Notation One) is a standard interface
description language for defining data structures that can be
serialized and deserialized in a cross-platform way. It is
broadly used in telecommunications and computer networking,
and especially in cryptography (https://en.wikipedia.org/wiki/ASN.1).
This option enables the support of the asn1 decoder.
config SPL_ASN1_DECODER
bool
help
ASN.1 (Abstract Syntax Notation One) is a standard interface
description language for defining data structures that can be
serialized and deserialized in a cross-platform way. It is
broadly used in telecommunications and computer networking,
and especially in cryptography (https://en.wikipedia.org/wiki/ASN.1).
This option enables the support of the asn1 decoder in the SPL.
config OID_REGISTRY
bool
help
In computing, object identifiers or OIDs are an identifier mechanism
standardized by the International Telecommunication Union (ITU) and
ISO/IEC for naming any object, concept, or "thing" with a globally
unambiguous persistent name (https://en.wikipedia.org/wiki/Object_identifier).
Enable fast lookup object identifier registry.
config SPL_OID_REGISTRY
bool
help
In computing, object identifiers or OIDs are an identifier mechanism
standardized by the International Telecommunication Union (ITU) and
ISO/IEC for naming any object, concept, or "thing" with a globally
unambiguous persistent name (https://en.wikipedia.org/wiki/Object_identifier).
Enable fast lookup object identifier registry in the SPL.
config SMBIOS
bool "SMBIOS support"
depends on X86 || EFI_LOADER
default y
select LAST_STAGE_INIT
help
Indicates that this platform can support System Management BIOS
(SMBIOS) tables. These provide various pieces of information about
the board, such as the manufacturer and the model name.
See GENERATE_SMBIOS_TABLE which controls whether U-Boot actually
creates these tables, rather than them coming from a previous firmware
stage.
config SMBIOS_PARSER
bool "SMBIOS parser"
help
A simple parser for SMBIOS data.
source lib/efi/Kconfig
source lib/efi_loader/Kconfig
source lib/optee/Kconfig
config TEST_FDTDEC
bool "enable fdtdec test"
depends on OF_LIBFDT
config LIB_DATE
bool
config LIB_ELF
bool
help
Support basic elf loading/validating functions.
This supports for 32 bit and 64 bit versions.
config LMB
bool "Enable the logical memory blocks library (lmb)"
default y if ARC || ARM || M68K || MICROBLAZE || MIPS || \
NIOS2 || PPC || RISCV || SANDBOX || SH || X86 || XTENSA
help
Support the library logical memory blocks.
config LMB_USE_MAX_REGIONS
bool "Use a common number of memory and reserved regions in lmb lib"
default y
help
Define the number of supported memory regions in the library logical
memory blocks.
This feature allow to reduce the lmb library size by using compiler
optimization when LMB_MEMORY_REGIONS == LMB_RESERVED_REGIONS.
config LMB_MAX_REGIONS
int "Number of memory and reserved regions in lmb lib"
depends on LMB_USE_MAX_REGIONS
default 16
help
Define the number of supported regions, memory and reserved, in the
library logical memory blocks.
config LMB_MEMORY_REGIONS
int "Number of memory regions in lmb lib"
depends on !LMB_USE_MAX_REGIONS
default 8
help
Define the number of supported memory regions in the library logical
memory blocks.
The minimal value is CONFIG_NR_DRAM_BANKS.
config LMB_RESERVED_REGIONS
int "Number of reserved regions in lmb lib"
depends on !LMB_USE_MAX_REGIONS
default 8
help
Define the number of supported reserved regions in the library logical
memory blocks.
config PHANDLE_CHECK_SEQ
bool "Enable phandle check while getting sequence number"
help
When there are multiple device tree nodes with same name,
enable this config option to distinguish them using
phandles in fdtdec_get_alias_seq() function.
endmenu
source lib/fwu_updates/Kconfig