[people/ms/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 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".

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

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

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
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
1a60650c JH	48	config REGEX
1a60650c JH	49	bool "Enable regular expression support"
f7848d90	50	default y if NET
1a60650c JH	51	help
	52	If this variable is defined, U-Boot is linked against the
	53	SLRE (Super Light Regular Expression) library, which adds
	54	regex support to some commands, for example "env grep" and
	55	"setexpr".
	56
9ba9e85f	57	config LIB_RAND
3850dbe8 MY	58	bool "Pseudo-random library support "
	59	help
	60	This library provides pseudo-random number generator functions.
9ba9e85f	61
ab4458bd SG	62	config SPL_TINY_MEMSET
	63	bool "Use a very small memset() in SPL"
	64	help
	65	The faster memset() is the arch-specific one (if available) enabled
	66	by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
	67	better performance by writing a word at a time. But in very
	68	size-constrained envrionments even this may be too big. Enable this
	69	option to reduce code size slightly at the cost of some speed.
	70
96b9082c PT	71	config TPL_TINY_MEMSET
	72	bool "Use a very small memset() in TPL"
	73	help
	74	The faster memset() is the arch-specific one (if available) enabled
	75	by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
	76	better performance by writing a word at a time. But in very
	77	size-constrained envrionments even this may be too big. Enable this
	78	option to reduce code size slightly at the cost of some speed.
	79
aa049152 BB	80	config RBTREE
	81	bool
	82
d1389403 SG	83	source lib/dhry/Kconfig
d1389403 SG	84
b1a873df SG	85	menu "Security support"
	86
	87	config AES
	88	bool "Support the AES algorithm"
	89	help
	90	This provides a means to encrypt and decrypt data using the AES
	91	(Advanced Encryption Standard). This algorithm uses a symetric key
	92	and is widely used as a streaming cipher. Different key lengths are
	93	supported by the algorithm but only a 128-bit key is supported at
	94	present.
	95
d9f23c7f	96	source lib/rsa/Kconfig
c4beb22f	97
a7d660bc SG	98	config TPM
a7d660bc SG	99	bool "Trusted Platform Module (TPM) Support"
2419cd16	100	depends on DM
a7d660bc SG	101	help
	102	This enables support for TPMs which can be used to provide security
	103	features for your board. The TPM can be connected via LPC or I2C
	104	and a sandbox TPM is provided for testing purposes. Use the 'tpm'
	105	command to interactive the TPM. Driver model support is provided
	106	for the low-level TPM interface, but only one TPM is supported at
	107	a time by the TPM library.
	108
b1a873df SG	109	endmenu
b1a873df SG	110
94e3c8c4	111	menu "Hashing Support"
	112
	113	config SHA1
	114	bool "Enable SHA1 support"
	115	help
	116	This option enables support of hashing using SHA1 algorithm.
	117	The hash is calculated in software.
	118	The SHA1 algorithm produces a 160-bit (20-byte) hash value
	119	(digest).
	120
	121	config SHA256
	122	bool "Enable SHA256 support"
	123	help
	124	This option enables support of hashing using SHA256 algorithm.
	125	The hash is calculated in software.
	126	The SHA256 algorithm produces a 256-bit (32-byte) hash value
	127	(digest).
	128
	129	config SHA_HW_ACCEL
	130	bool "Enable hashing using hardware"
	131	help
	132	This option enables hardware acceleration
	133	for SHA1/SHA256 hashing.
	134	This affects the 'hash' command and also the
	135	hash_lookup_algo() function.
	136
	137	config SHA_PROG_HW_ACCEL
	138	bool "Enable Progressive hashing support using hardware"
	139	depends on SHA_HW_ACCEL
	140	help
	141	This option enables hardware-acceleration for
	142	SHA1/SHA256 progressive hashing.
	143	Data can be streamed in a block at a time and the hashing
	144	is performed in hardware.
bea79d7d AP	145
	146	config MD5
	147	bool
	148
94e3c8c4	149	endmenu
94e3c8c4	150
027b728d JW	151	menu "Compression Support"
	152
	153	config LZ4
	154	bool "Enable LZ4 decompression support"
	155	help
	156	If this option is set, support for LZ4 compressed images
	157	is included. The LZ4 algorithm can run in-place as long as the
	158	compressed image is loaded to the end of the output buffer, and
	159	trades lower compression ratios for much faster decompression.
	160
	161	NOTE: This implements the release version of the LZ4 frame
	162	format as generated by default by the 'lz4' command line tool.
	163	This is not the same as the outdated, less efficient legacy
	164	frame format currently (2015) implemented in the Linux kernel
	165	(generated by 'lz4 -l'). The two formats are incompatible.
	166
aed998aa SG	167	config LZMA
	168	bool "Enable LZMA decompression support"
	169	help
	170	This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
	171	a dictionary compression algorithm that provides a high compression
	172	ratio and fairly fast decompression speed. See also
	173	CONFIG_CMD_LZMADEC which provides a decode command.
	174
173aafbf	175	config LZO
d56b4b19 TR	176	bool "Enable LZO decompression support"
	177	help
	178	This enables support for LZO compression algorithm.r
027b728d JW	179	endmenu
027b728d JW	180
6501ff62 PM	181	config ERRNO_STR
	182	bool "Enable function for getting errno-related string message"
	183	help
	184	The function errno_str(int errno), returns a pointer to the errno
	185	corresponding text message:
	186	- if errno is null or positive number - a pointer to "Success" message
	187	- if errno is negative - a pointer to errno related message
	188
69e173eb SG	189	config OF_LIBFDT
	190	bool "Enable the FDT library"
	191	default y if OF_CONTROL
	192	help
	193	This enables the FDT library (libfdt). It provides functions for
	194	accessing binary device tree images in memory, such as adding and
f1a7ba1d	195	removing nodes and properties, scanning through the tree and finding
69e173eb SG	196	particular compatible nodes. The library operates on a flattened
	197	version of the device tree.
	198
ddf67f71 MR	199	config OF_LIBFDT_OVERLAY
	200	bool "Enable the FDT library overlay support"
	201	help
	202	This enables the FDT library (libfdt) overlay support.
	203
aa34fbc0 SG	204	config SPL_OF_LIBFDT
	205	bool "Enable the FDT library for SPL"
	206	default y if SPL_OF_CONTROL
	207	help
	208	This enables the FDT library (libfdt). It provides functions for
	209	accessing binary device tree images in memory, such as adding and
f1a7ba1d	210	removing nodes and properties, scanning through the tree and finding
aa34fbc0 SG	211	particular compatible nodes. The library operates on a flattened
	212	version of the device tree.
	213
ebf7fff2 HS	214	config FDT_FIXUP_PARTITIONS
	215	bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
	216	depends on OF_LIBFDT
	217	default n
	218	help
	219	Allow overwriting defined partitions in the device tree blob
	220	using partition info defined in the 'mtdparts' environment
	221	variable.
	222
4b6dddc2	223	menu "System tables"
e663b350	224	depends on (!EFI && !SYS_COREBOOT) \|\| (ARM && EFI_LOADER)
4b6dddc2 AG	225
	226	config GENERATE_SMBIOS_TABLE
	227	bool "Generate an SMBIOS (System Management BIOS) table"
	228	default y
e663b350	229	depends on X86 \|\| EFI_LOADER
4b6dddc2 AG	230	help
	231	The System Management BIOS (SMBIOS) specification addresses how
	232	motherboard and system vendors present management information about
	233	their products in a standard format by extending the BIOS interface
	234	on Intel architecture systems.
	235
	236	Check http://www.dmtf.org/standards/smbios for details.
	237
	238	config SMBIOS_MANUFACTURER
	239	string "SMBIOS Manufacturer"
	240	depends on GENERATE_SMBIOS_TABLE
	241	default SYS_VENDOR
	242	help
	243	The board manufacturer to store in SMBIOS structures.
	244	Change this to override the default one (CONFIG_SYS_VENDOR).
	245
	246	config SMBIOS_PRODUCT_NAME
	247	string "SMBIOS Product Name"
	248	depends on GENERATE_SMBIOS_TABLE
	249	default SYS_BOARD
	250	help
	251	The product name to store in SMBIOS structures.
	252	Change this to override the default one (CONFIG_SYS_BOARD).
	253
	254	endmenu
	255
867a6ac8	256	source lib/efi/Kconfig
ed980b8c	257	source lib/efi_loader/Kconfig
867a6ac8	258
ed36323f	259	endmenu