[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 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

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
a451bc27 AF	21	config LIB_UUID
	22	bool
	23
45ccec8f MY	24	config USE_PRIVATE_LIBGCC
	25	bool "Use private libgcc"
	26	depends on HAVE_PRIVATE_LIBGCC
91b86e21	27	default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) \|\| MIPS)
45ccec8f MY	28	help
45ccec8f MY	29	This option allows you to use the built-in libgcc implementation
67976306	30	of U-Boot instead of the one provided by the compiler.
45ccec8f MY	31	If unsure, say N.
45ccec8f MY	32
8c688bc4 MY	33	config SYS_HZ
	34	int
	35	default 1000
	36	help
	37	The frequency of the timer returned by get_timer().
	38	get_timer() must operate in milliseconds and this option must be
	39	set to 1000.
	40
7d9cde10 SR	41	config USE_TINY_PRINTF
	42	bool "Enable tiny printf() version"
	43	help
	44	This option enables a tiny, stripped down printf version.
	45	This should only be used in space limited environments,
	46	like SPL versions with hard memory limits. This version
	47	reduces the code size by about 2.5KiB on armv7.
	48
	49	The supported format specifiers are %c, %s, %u/%d and %x.
	50
7e3caa81 MY	51	config PANIC_HANG
	52	bool "Do not reset the system on fatal error"
	53	help
	54	Define this option to stop the system in case of a fatal error,
	55	so that you have to reset it manually. This is probably NOT a good
	56	idea for an embedded system where you want the system to reboot
	57	automatically as fast as possible, but it may be useful during
	58	development since you can try to debug the conditions that lead to
	59	the situation.
	60
1a60650c JH	61	config REGEX
1a60650c JH	62	bool "Enable regular expression support"
acd4d334	63	default n if ARCH_SUNXI
f7848d90	64	default y if NET
1a60650c JH	65	help
	66	If this variable is defined, U-Boot is linked against the
	67	SLRE (Super Light Regular Expression) library, which adds
	68	regex support to some commands, for example "env grep" and
	69	"setexpr".
	70
a5a37567 AF	71	choice
	72	prompt "Pseudo-random library support type"
	73	depends on NET_RANDOM_ETHADDR \|\| RANDOM_UUID \|\| CMD_UUID
	74	default LIB_RAND
3850dbe8	75	help
a5a37567 AF	76	Select the library to provide pseudo-random number generator
	77	functions. LIB_HW_RAND supports certain hardware engines that
	78	provide this functionality. If in doubt, select LIB_RAND.
	79
	80	config LIB_RAND
	81	bool "Pseudo-random library support"
	82
	83	config LIB_HW_RAND
	84	bool "HW Engine for random libray support"
	85
	86	endchoice
9ba9e85f	87
ab4458bd SG	88	config SPL_TINY_MEMSET
	89	bool "Use a very small memset() in SPL"
	90	help
	91	The faster memset() is the arch-specific one (if available) enabled
	92	by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
	93	better performance by writing a word at a time. But in very
	94	size-constrained envrionments even this may be too big. Enable this
	95	option to reduce code size slightly at the cost of some speed.
	96
96b9082c PT	97	config TPL_TINY_MEMSET
	98	bool "Use a very small memset() in TPL"
	99	help
	100	The faster memset() is the arch-specific one (if available) enabled
	101	by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
	102	better performance by writing a word at a time. But in very
	103	size-constrained envrionments even this may be too big. Enable this
	104	option to reduce code size slightly at the cost of some speed.
	105
aa049152 BB	106	config RBTREE
	107	bool
	108
da5337a6 NH	109	config BITREVERSE
	110	bool "Bit reverse library from Linux"
	111
d1389403 SG	112	source lib/dhry/Kconfig
d1389403 SG	113
b1a873df SG	114	menu "Security support"
	115
	116	config AES
	117	bool "Support the AES algorithm"
	118	help
	119	This provides a means to encrypt and decrypt data using the AES
	120	(Advanced Encryption Standard). This algorithm uses a symetric key
	121	and is widely used as a streaming cipher. Different key lengths are
	122	supported by the algorithm but only a 128-bit key is supported at
	123	present.
	124
d9f23c7f	125	source lib/rsa/Kconfig
c4beb22f	126
a7d660bc SG	127	config TPM
a7d660bc SG	128	bool "Trusted Platform Module (TPM) Support"
2419cd16	129	depends on DM
a7d660bc SG	130	help
	131	This enables support for TPMs which can be used to provide security
	132	features for your board. The TPM can be connected via LPC or I2C
	133	and a sandbox TPM is provided for testing purposes. Use the 'tpm'
	134	command to interactive the TPM. Driver model support is provided
	135	for the low-level TPM interface, but only one TPM is supported at
	136	a time by the TPM library.
	137
b1a873df SG	138	endmenu
b1a873df SG	139
94e3c8c4	140	menu "Hashing Support"
	141
	142	config SHA1
	143	bool "Enable SHA1 support"
	144	help
	145	This option enables support of hashing using SHA1 algorithm.
	146	The hash is calculated in software.
	147	The SHA1 algorithm produces a 160-bit (20-byte) hash value
	148	(digest).
	149
	150	config SHA256
	151	bool "Enable SHA256 support"
	152	help
	153	This option enables support of hashing using SHA256 algorithm.
	154	The hash is calculated in software.
	155	The SHA256 algorithm produces a 256-bit (32-byte) hash value
	156	(digest).
	157
	158	config SHA_HW_ACCEL
	159	bool "Enable hashing using hardware"
	160	help
	161	This option enables hardware acceleration
	162	for SHA1/SHA256 hashing.
	163	This affects the 'hash' command and also the
	164	hash_lookup_algo() function.
	165
	166	config SHA_PROG_HW_ACCEL
	167	bool "Enable Progressive hashing support using hardware"
	168	depends on SHA_HW_ACCEL
	169	help
	170	This option enables hardware-acceleration for
	171	SHA1/SHA256 progressive hashing.
	172	Data can be streamed in a block at a time and the hashing
	173	is performed in hardware.
bea79d7d AP	174
	175	config MD5
	176	bool
	177
85d8bf57 MB	178	config CRC32C
	179	bool
	180
94e3c8c4	181	endmenu
94e3c8c4	182
027b728d JW	183	menu "Compression Support"
	184
	185	config LZ4
	186	bool "Enable LZ4 decompression support"
	187	help
	188	If this option is set, support for LZ4 compressed images
	189	is included. The LZ4 algorithm can run in-place as long as the
	190	compressed image is loaded to the end of the output buffer, and
	191	trades lower compression ratios for much faster decompression.
	192
	193	NOTE: This implements the release version of the LZ4 frame
	194	format as generated by default by the 'lz4' command line tool.
	195	This is not the same as the outdated, less efficient legacy
	196	frame format currently (2015) implemented in the Linux kernel
	197	(generated by 'lz4 -l'). The two formats are incompatible.
	198
aed998aa SG	199	config LZMA
	200	bool "Enable LZMA decompression support"
	201	help
	202	This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
	203	a dictionary compression algorithm that provides a high compression
	204	ratio and fairly fast decompression speed. See also
	205	CONFIG_CMD_LZMADEC which provides a decode command.
	206
173aafbf	207	config LZO
d56b4b19 TR	208	bool "Enable LZO decompression support"
	209	help
	210	This enables support for LZO compression algorithm.r
7264f292	211
f52bdf4b JJH	212	config SPL_LZO
	213	bool "Enable LZO decompression support in SPL"
	214	help
	215	This enables support for LZO compression algorithm in the SPL.
	216
7264f292 YS	217	config SPL_GZIP
	218	bool "Enable gzip decompression support for SPL build"
	219	select SPL_ZLIB
	220	help
	221	This enables support for GZIP compression altorithm for SPL boot.
	222
	223	config SPL_ZLIB
	224	bool
	225	help
	226	This enables compression lib for SPL boot.
	227
027b728d JW	228	endmenu
027b728d JW	229
6501ff62 PM	230	config ERRNO_STR
	231	bool "Enable function for getting errno-related string message"
	232	help
	233	The function errno_str(int errno), returns a pointer to the errno
	234	corresponding text message:
	235	- if errno is null or positive number - a pointer to "Success" message
	236	- if errno is negative - a pointer to errno related message
	237
69e173eb SG	238	config OF_LIBFDT
	239	bool "Enable the FDT library"
	240	default y if 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
69e173eb SG	245	particular compatible nodes. The library operates on a flattened
	246	version of the device tree.
	247
ddf67f71 MR	248	config OF_LIBFDT_OVERLAY
	249	bool "Enable the FDT library overlay support"
	250	help
	251	This enables the FDT library (libfdt) overlay support.
	252
aa34fbc0 SG	253	config SPL_OF_LIBFDT
	254	bool "Enable the FDT library for SPL"
	255	default y if SPL_OF_CONTROL
	256	help
	257	This enables the FDT library (libfdt). It provides functions for
	258	accessing binary device tree images in memory, such as adding and
f1a7ba1d	259	removing nodes and properties, scanning through the tree and finding
aa34fbc0 SG	260	particular compatible nodes. The library operates on a flattened
	261	version of the device tree.
	262
ebf7fff2 HS	263	config FDT_FIXUP_PARTITIONS
	264	bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
	265	depends on OF_LIBFDT
	266	default n
	267	help
	268	Allow overwriting defined partitions in the device tree blob
	269	using partition info defined in the 'mtdparts' environment
	270	variable.
	271
4b6dddc2	272	menu "System tables"
e663b350	273	depends on (!EFI && !SYS_COREBOOT) \|\| (ARM && EFI_LOADER)
4b6dddc2 AG	274
	275	config GENERATE_SMBIOS_TABLE
	276	bool "Generate an SMBIOS (System Management BIOS) table"
	277	default y
e663b350	278	depends on X86 \|\| EFI_LOADER
4b6dddc2 AG	279	help
	280	The System Management BIOS (SMBIOS) specification addresses how
	281	motherboard and system vendors present management information about
	282	their products in a standard format by extending the BIOS interface
	283	on Intel architecture systems.
	284
	285	Check http://www.dmtf.org/standards/smbios for details.
	286
	287	config SMBIOS_MANUFACTURER
	288	string "SMBIOS Manufacturer"
	289	depends on GENERATE_SMBIOS_TABLE
	290	default SYS_VENDOR
	291	help
	292	The board manufacturer to store in SMBIOS structures.
	293	Change this to override the default one (CONFIG_SYS_VENDOR).
	294
	295	config SMBIOS_PRODUCT_NAME
	296	string "SMBIOS Product Name"
	297	depends on GENERATE_SMBIOS_TABLE
	298	default SYS_BOARD
	299	help
	300	The product name to store in SMBIOS structures.
	301	Change this to override the default one (CONFIG_SYS_BOARD).
	302
	303	endmenu
	304
867a6ac8	305	source lib/efi/Kconfig
ed980b8c	306	source lib/efi_loader/Kconfig
867a6ac8	307
ed36323f	308	endmenu