[u-boot.git] / lib / Kconfig

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 HAVE_PRIVATE_LIBGCC
	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".

config LIB_RAND
	bool "Pseudo-random library support "
	help
	  This library provides pseudo-random number generator functions.

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

endmenu
Commit	Line	Data
ed36323f MY	1	menu "Library routines"
ed36323f MY	2
6ef2f901 AF	3	config BCH
	4	bool "Enable Software based BCH ECC"
	5	help
	6	Enables software based BCH ECC algorithm present in lib/bch.c
	7	This is used by SoC platforms which do not have built-in ELM
	8	hardware engine required for BCH ECC correction.
	9
b0928da6 MY	10	config CC_OPTIMIZE_LIBS_FOR_SPEED
	11	bool "Optimize libraries for speed"
	12	help
	13	Enabling this option will pass "-O2" to gcc when compiling
	14	under "lib" directory.
	15
	16	If unsure, say N.
	17
45ccec8f MY	18	config HAVE_PRIVATE_LIBGCC
	19	bool
	20
	21	config USE_PRIVATE_LIBGCC
	22	bool "Use private libgcc"
	23	depends on HAVE_PRIVATE_LIBGCC
91b86e21	24	default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) \|\| MIPS)
45ccec8f MY	25	help
45ccec8f MY	26	This option allows you to use the built-in libgcc implementation
67976306	27	of U-Boot instead of the one provided by the compiler.
45ccec8f MY	28	If unsure, say N.
45ccec8f MY	29
8c688bc4 MY	30	config SYS_HZ
	31	int
	32	default 1000
	33	help
	34	The frequency of the timer returned by get_timer().
	35	get_timer() must operate in milliseconds and this option must be
	36	set to 1000.
	37
7d9cde10 SR	38	config USE_TINY_PRINTF
	39	bool "Enable tiny printf() version"
	40	help
	41	This option enables a tiny, stripped down printf version.
	42	This should only be used in space limited environments,
	43	like SPL versions with hard memory limits. This version
	44	reduces the code size by about 2.5KiB on armv7.
	45
	46	The supported format specifiers are %c, %s, %u/%d and %x.
	47
7e3caa81 MY	48	config PANIC_HANG
	49	bool "Do not reset the system on fatal error"
	50	help
	51	Define this option to stop the system in case of a fatal error,
	52	so that you have to reset it manually. This is probably NOT a good
	53	idea for an embedded system where you want the system to reboot
	54	automatically as fast as possible, but it may be useful during
	55	development since you can try to debug the conditions that lead to
	56	the situation.
	57
1a60650c JH	58	config REGEX
1a60650c JH	59	bool "Enable regular expression support"
acd4d334	60	default n if ARCH_SUNXI
f7848d90	61	default y if NET
1a60650c JH	62	help
	63	If this variable is defined, U-Boot is linked against the
	64	SLRE (Super Light Regular Expression) library, which adds
	65	regex support to some commands, for example "env grep" and
	66	"setexpr".
	67
9ba9e85f	68	config LIB_RAND
3850dbe8 MY	69	bool "Pseudo-random library support "
	70	help
	71	This library provides pseudo-random number generator functions.
9ba9e85f	72
ab4458bd SG	73	config SPL_TINY_MEMSET
	74	bool "Use a very small memset() in SPL"
	75	help
	76	The faster memset() is the arch-specific one (if available) enabled
	77	by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
	78	better performance by writing a word at a time. But in very
	79	size-constrained envrionments even this may be too big. Enable this
	80	option to reduce code size slightly at the cost of some speed.
	81
96b9082c PT	82	config TPL_TINY_MEMSET
	83	bool "Use a very small memset() in TPL"
	84	help
	85	The faster memset() is the arch-specific one (if available) enabled
	86	by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
	87	better performance by writing a word at a time. But in very
	88	size-constrained envrionments even this may be too big. Enable this
	89	option to reduce code size slightly at the cost of some speed.
	90
aa049152 BB	91	config RBTREE
	92	bool
	93
da5337a6 NH	94	config BITREVERSE
	95	bool "Bit reverse library from Linux"
	96
d1389403 SG	97	source lib/dhry/Kconfig
d1389403 SG	98
b1a873df SG	99	menu "Security support"
	100
	101	config AES
	102	bool "Support the AES algorithm"
	103	help
	104	This provides a means to encrypt and decrypt data using the AES
	105	(Advanced Encryption Standard). This algorithm uses a symetric key
	106	and is widely used as a streaming cipher. Different key lengths are
	107	supported by the algorithm but only a 128-bit key is supported at
	108	present.
	109
d9f23c7f	110	source lib/rsa/Kconfig
c4beb22f	111
a7d660bc SG	112	config TPM
a7d660bc SG	113	bool "Trusted Platform Module (TPM) Support"
2419cd16	114	depends on DM
a7d660bc SG	115	help
	116	This enables support for TPMs which can be used to provide security
	117	features for your board. The TPM can be connected via LPC or I2C
	118	and a sandbox TPM is provided for testing purposes. Use the 'tpm'
	119	command to interactive the TPM. Driver model support is provided
	120	for the low-level TPM interface, but only one TPM is supported at
	121	a time by the TPM library.
	122
b1a873df SG	123	endmenu
b1a873df SG	124
94e3c8c4	125	menu "Hashing Support"
	126
	127	config SHA1
	128	bool "Enable SHA1 support"
	129	help
	130	This option enables support of hashing using SHA1 algorithm.
	131	The hash is calculated in software.
	132	The SHA1 algorithm produces a 160-bit (20-byte) hash value
	133	(digest).
	134
	135	config SHA256
	136	bool "Enable SHA256 support"
	137	help
	138	This option enables support of hashing using SHA256 algorithm.
	139	The hash is calculated in software.
	140	The SHA256 algorithm produces a 256-bit (32-byte) hash value
	141	(digest).
	142
	143	config SHA_HW_ACCEL
	144	bool "Enable hashing using hardware"
	145	help
	146	This option enables hardware acceleration
	147	for SHA1/SHA256 hashing.
	148	This affects the 'hash' command and also the
	149	hash_lookup_algo() function.
	150
	151	config SHA_PROG_HW_ACCEL
	152	bool "Enable Progressive hashing support using hardware"
	153	depends on SHA_HW_ACCEL
	154	help
	155	This option enables hardware-acceleration for
	156	SHA1/SHA256 progressive hashing.
	157	Data can be streamed in a block at a time and the hashing
	158	is performed in hardware.
bea79d7d AP	159
	160	config MD5
	161	bool
	162
85d8bf57 MB	163	config CRC32C
	164	bool
	165
94e3c8c4	166	endmenu
94e3c8c4	167
027b728d JW	168	menu "Compression Support"
	169
	170	config LZ4
	171	bool "Enable LZ4 decompression support"
	172	help
	173	If this option is set, support for LZ4 compressed images
	174	is included. The LZ4 algorithm can run in-place as long as the
	175	compressed image is loaded to the end of the output buffer, and
	176	trades lower compression ratios for much faster decompression.
	177
	178	NOTE: This implements the release version of the LZ4 frame
	179	format as generated by default by the 'lz4' command line tool.
	180	This is not the same as the outdated, less efficient legacy
	181	frame format currently (2015) implemented in the Linux kernel
	182	(generated by 'lz4 -l'). The two formats are incompatible.
	183
aed998aa SG	184	config LZMA
	185	bool "Enable LZMA decompression support"
	186	help
	187	This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
	188	a dictionary compression algorithm that provides a high compression
	189	ratio and fairly fast decompression speed. See also
	190	CONFIG_CMD_LZMADEC which provides a decode command.
	191
173aafbf	192	config LZO
d56b4b19 TR	193	bool "Enable LZO decompression support"
	194	help
	195	This enables support for LZO compression algorithm.r
7264f292	196
f52bdf4b JJH	197	config SPL_LZO
	198	bool "Enable LZO decompression support in SPL"
	199	help
	200	This enables support for LZO compression algorithm in the SPL.
	201
7264f292 YS	202	config SPL_GZIP
	203	bool "Enable gzip decompression support for SPL build"
	204	select SPL_ZLIB
	205	help
	206	This enables support for GZIP compression altorithm for SPL boot.
	207
	208	config SPL_ZLIB
	209	bool
	210	help
	211	This enables compression lib for SPL boot.
	212
027b728d JW	213	endmenu
027b728d JW	214
6501ff62 PM	215	config ERRNO_STR
	216	bool "Enable function for getting errno-related string message"
	217	help
	218	The function errno_str(int errno), returns a pointer to the errno
	219	corresponding text message:
	220	- if errno is null or positive number - a pointer to "Success" message
	221	- if errno is negative - a pointer to errno related message
	222
69e173eb SG	223	config OF_LIBFDT
	224	bool "Enable the FDT library"
	225	default y if OF_CONTROL
	226	help
	227	This enables the FDT library (libfdt). It provides functions for
	228	accessing binary device tree images in memory, such as adding and
f1a7ba1d	229	removing nodes and properties, scanning through the tree and finding
69e173eb SG	230	particular compatible nodes. The library operates on a flattened
	231	version of the device tree.
	232
ddf67f71 MR	233	config OF_LIBFDT_OVERLAY
	234	bool "Enable the FDT library overlay support"
	235	help
	236	This enables the FDT library (libfdt) overlay support.
	237
aa34fbc0 SG	238	config SPL_OF_LIBFDT
	239	bool "Enable the FDT library for SPL"
	240	default y if SPL_OF_CONTROL
	241	help
	242	This enables the FDT library (libfdt). It provides functions for
	243	accessing binary device tree images in memory, such as adding and
f1a7ba1d	244	removing nodes and properties, scanning through the tree and finding
aa34fbc0 SG	245	particular compatible nodes. The library operates on a flattened
	246	version of the device tree.
	247
ebf7fff2 HS	248	config FDT_FIXUP_PARTITIONS
	249	bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
	250	depends on OF_LIBFDT
	251	default n
	252	help
	253	Allow overwriting defined partitions in the device tree blob
	254	using partition info defined in the 'mtdparts' environment
	255	variable.
	256
4b6dddc2	257	menu "System tables"
e663b350	258	depends on (!EFI && !SYS_COREBOOT) \|\| (ARM && EFI_LOADER)
4b6dddc2 AG	259
	260	config GENERATE_SMBIOS_TABLE
	261	bool "Generate an SMBIOS (System Management BIOS) table"
	262	default y
e663b350	263	depends on X86 \|\| EFI_LOADER
4b6dddc2 AG	264	help
	265	The System Management BIOS (SMBIOS) specification addresses how
	266	motherboard and system vendors present management information about
	267	their products in a standard format by extending the BIOS interface
	268	on Intel architecture systems.
	269
	270	Check http://www.dmtf.org/standards/smbios for details.
	271
	272	config SMBIOS_MANUFACTURER
	273	string "SMBIOS Manufacturer"
	274	depends on GENERATE_SMBIOS_TABLE
	275	default SYS_VENDOR
	276	help
	277	The board manufacturer to store in SMBIOS structures.
	278	Change this to override the default one (CONFIG_SYS_VENDOR).
	279
	280	config SMBIOS_PRODUCT_NAME
	281	string "SMBIOS Product Name"
	282	depends on GENERATE_SMBIOS_TABLE
	283	default SYS_BOARD
	284	help
	285	The product name to store in SMBIOS structures.
	286	Change this to override the default one (CONFIG_SYS_BOARD).
	287
	288	endmenu
	289
867a6ac8	290	source lib/efi/Kconfig
ed980b8c	291	source lib/efi_loader/Kconfig
867a6ac8	292
ed36323f	293	endmenu