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+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 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 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 !SPL_USE_TINY_PRINTF
+
+config TPL_PRINTF
+ bool
+ select TPL_SPRINTF
+ select TPL_STRTO if !TPL_USE_TINY_PRINTF
+
+config SPRINTF
+ bool
+ default y
+
+config SPL_SPRINTF
+ bool
+
+config TPL_SPRINTF
+ bool
+
+config SSCANF
+ bool
+ default n
+
+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 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 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 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
+ select 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 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
+source lib/crypto/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 SHA512_ALGO
+ bool "Enable SHA512 algorithm"
+ help
+ This option enables support of internal SHA512 algorithm.
+
+config SHA512
+ bool "Enable SHA512 support"
+ depends on SHA512_ALGO
+ 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"
+ depends on SHA512_ALGO
+ help
+ This option enables support of hashing using SHA384 algorithm.
+ The hash is calculated in software.
+ 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 SHA_HW_ACCEL
+
+config SHA512_HW_ACCEL
+ bool "Enable hardware acceleration for SHA512"
+ depends on SHA512_ALGO
+ 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"
+ 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 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_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.
+
+config SPL_LZ4
+ bool "Enable LZ4 decompression support in 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"
+ help
+ This enables support for LZMA compression algorithm for SPL boot.
+
+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 SPL_HEXDUMP
+ bool "Enable hexdump in SPL"
+ depends on HEXDUMP
+ default y
+ 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 0
+ 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 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 SPL_OF_LIBFDT_ASSUME_MASK
+ hex "Mask of conditions to assume for libfdt"
+ depends on SPL_OF_LIBFDT || FIT
+ 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"
+ 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
+ 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 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 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"
+ 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.
+
+ See also SMBIOS_SYSINFO which allows SMBIOS values to be provided in
+ the devicetree.
+
+endmenu
+
+config ASN1_COMPILER
+ bool
+
+config ASN1_DECODER
+ bool
+ help
+ Enable asn1 decoder library.
+
+config OID_REGISTRY
+ bool
+ help
+ Enable fast lookup object identifier registry.
+
+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 || NDS32 || \
+ NIOS2 || PPC || RISCV || SANDBOX || SH || X86 || XTENSA
+ help
+ Support the library logical memory blocks.
+
+config LMB_USE_MAX_REGIONS
+ bool "Use a commun number of memory and reserved regions in lmb lib"
+ depends on LMB
+ 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 && LMB_USE_MAX_REGIONS
+ default 8
+ 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 && !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 && !LMB_USE_MAX_REGIONS
+ default 8
+ help
+ Define the number of supported reserved regions in the library logical
+ memory blocks.
+
+endmenu
+
+config PHANDLE_CHECK_SEQ
+ bool "Enable phandle check while getting sequence number"
+ default n
+ 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.