[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 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".

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"
f7848d90	60	default y if NET
1a60650c JH	61	help
	62	If this variable is defined, U-Boot is linked against the
	63	SLRE (Super Light Regular Expression) library, which adds
	64	regex support to some commands, for example "env grep" and
	65	"setexpr".
	66
9ba9e85f	67	config LIB_RAND
3850dbe8 MY	68	bool "Pseudo-random library support "
	69	help
	70	This library provides pseudo-random number generator functions.
9ba9e85f	71
ab4458bd SG	72	config SPL_TINY_MEMSET
	73	bool "Use a very small memset() in SPL"
	74	help
	75	The faster memset() is the arch-specific one (if available) enabled
	76	by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
	77	better performance by writing a word at a time. But in very
	78	size-constrained envrionments even this may be too big. Enable this
	79	option to reduce code size slightly at the cost of some speed.
	80
96b9082c PT	81	config TPL_TINY_MEMSET
	82	bool "Use a very small memset() in TPL"
	83	help
	84	The faster memset() is the arch-specific one (if available) enabled
	85	by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
	86	better performance by writing a word at a time. But in very
	87	size-constrained envrionments even this may be too big. Enable this
	88	option to reduce code size slightly at the cost of some speed.
	89
aa049152 BB	90	config RBTREE
	91	bool
	92
da5337a6 NH	93	config BITREVERSE
	94	bool "Bit reverse library from Linux"
	95
d1389403 SG	96	source lib/dhry/Kconfig
d1389403 SG	97
b1a873df SG	98	menu "Security support"
	99
	100	config AES
	101	bool "Support the AES algorithm"
	102	help
	103	This provides a means to encrypt and decrypt data using the AES
	104	(Advanced Encryption Standard). This algorithm uses a symetric key
	105	and is widely used as a streaming cipher. Different key lengths are
	106	supported by the algorithm but only a 128-bit key is supported at
	107	present.
	108
d9f23c7f	109	source lib/rsa/Kconfig
c4beb22f	110
a7d660bc SG	111	config TPM
a7d660bc SG	112	bool "Trusted Platform Module (TPM) Support"
2419cd16	113	depends on DM
a7d660bc SG	114	help
	115	This enables support for TPMs which can be used to provide security
	116	features for your board. The TPM can be connected via LPC or I2C
	117	and a sandbox TPM is provided for testing purposes. Use the 'tpm'
	118	command to interactive the TPM. Driver model support is provided
	119	for the low-level TPM interface, but only one TPM is supported at
	120	a time by the TPM library.
	121
b1a873df SG	122	endmenu
b1a873df SG	123
94e3c8c4	124	menu "Hashing Support"
	125
	126	config SHA1
	127	bool "Enable SHA1 support"
	128	help
	129	This option enables support of hashing using SHA1 algorithm.
	130	The hash is calculated in software.
	131	The SHA1 algorithm produces a 160-bit (20-byte) hash value
	132	(digest).
	133
	134	config SHA256
	135	bool "Enable SHA256 support"
	136	help
	137	This option enables support of hashing using SHA256 algorithm.
	138	The hash is calculated in software.
	139	The SHA256 algorithm produces a 256-bit (32-byte) hash value
	140	(digest).
	141
	142	config SHA_HW_ACCEL
	143	bool "Enable hashing using hardware"
	144	help
	145	This option enables hardware acceleration
	146	for SHA1/SHA256 hashing.
	147	This affects the 'hash' command and also the
	148	hash_lookup_algo() function.
	149
	150	config SHA_PROG_HW_ACCEL
	151	bool "Enable Progressive hashing support using hardware"
	152	depends on SHA_HW_ACCEL
	153	help
	154	This option enables hardware-acceleration for
	155	SHA1/SHA256 progressive hashing.
	156	Data can be streamed in a block at a time and the hashing
	157	is performed in hardware.
bea79d7d AP	158
	159	config MD5
	160	bool
	161
85d8bf57 MB	162	config CRC32C
	163	bool
	164
94e3c8c4	165	endmenu
94e3c8c4	166
027b728d JW	167	menu "Compression Support"
	168
	169	config LZ4
	170	bool "Enable LZ4 decompression support"
	171	help
	172	If this option is set, support for LZ4 compressed images
	173	is included. The LZ4 algorithm can run in-place as long as the
	174	compressed image is loaded to the end of the output buffer, and
	175	trades lower compression ratios for much faster decompression.
	176
	177	NOTE: This implements the release version of the LZ4 frame
	178	format as generated by default by the 'lz4' command line tool.
	179	This is not the same as the outdated, less efficient legacy
	180	frame format currently (2015) implemented in the Linux kernel
	181	(generated by 'lz4 -l'). The two formats are incompatible.
	182
aed998aa SG	183	config LZMA
	184	bool "Enable LZMA decompression support"
	185	help
	186	This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
	187	a dictionary compression algorithm that provides a high compression
	188	ratio and fairly fast decompression speed. See also
	189	CONFIG_CMD_LZMADEC which provides a decode command.
	190
173aafbf	191	config LZO
d56b4b19 TR	192	bool "Enable LZO decompression support"
	193	help
	194	This enables support for LZO compression algorithm.r
7264f292	195
f52bdf4b JJH	196	config SPL_LZO
	197	bool "Enable LZO decompression support in SPL"
	198	help
	199	This enables support for LZO compression algorithm in the SPL.
	200
7264f292 YS	201	config SPL_GZIP
	202	bool "Enable gzip decompression support for SPL build"
	203	select SPL_ZLIB
	204	help
	205	This enables support for GZIP compression altorithm for SPL boot.
	206
	207	config SPL_ZLIB
	208	bool
	209	help
	210	This enables compression lib for SPL boot.
	211
027b728d JW	212	endmenu
027b728d JW	213
6501ff62 PM	214	config ERRNO_STR
	215	bool "Enable function for getting errno-related string message"
	216	help
	217	The function errno_str(int errno), returns a pointer to the errno
	218	corresponding text message:
	219	- if errno is null or positive number - a pointer to "Success" message
	220	- if errno is negative - a pointer to errno related message
	221
69e173eb SG	222	config OF_LIBFDT
	223	bool "Enable the FDT library"
	224	default y if OF_CONTROL
	225	help
	226	This enables the FDT library (libfdt). It provides functions for
	227	accessing binary device tree images in memory, such as adding and
f1a7ba1d	228	removing nodes and properties, scanning through the tree and finding
69e173eb SG	229	particular compatible nodes. The library operates on a flattened
	230	version of the device tree.
	231
ddf67f71 MR	232	config OF_LIBFDT_OVERLAY
	233	bool "Enable the FDT library overlay support"
	234	help
	235	This enables the FDT library (libfdt) overlay support.
	236
aa34fbc0 SG	237	config SPL_OF_LIBFDT
	238	bool "Enable the FDT library for SPL"
	239	default y if SPL_OF_CONTROL
	240	help
	241	This enables the FDT library (libfdt). It provides functions for
	242	accessing binary device tree images in memory, such as adding and
f1a7ba1d	243	removing nodes and properties, scanning through the tree and finding
aa34fbc0 SG	244	particular compatible nodes. The library operates on a flattened
	245	version of the device tree.
	246
ebf7fff2 HS	247	config FDT_FIXUP_PARTITIONS
	248	bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
	249	depends on OF_LIBFDT
	250	default n
	251	help
	252	Allow overwriting defined partitions in the device tree blob
	253	using partition info defined in the 'mtdparts' environment
	254	variable.
	255
4b6dddc2	256	menu "System tables"
e663b350	257	depends on (!EFI && !SYS_COREBOOT) \|\| (ARM && EFI_LOADER)
4b6dddc2 AG	258
	259	config GENERATE_SMBIOS_TABLE
	260	bool "Generate an SMBIOS (System Management BIOS) table"
	261	default y
e663b350	262	depends on X86 \|\| EFI_LOADER
4b6dddc2 AG	263	help
	264	The System Management BIOS (SMBIOS) specification addresses how
	265	motherboard and system vendors present management information about
	266	their products in a standard format by extending the BIOS interface
	267	on Intel architecture systems.
	268
	269	Check http://www.dmtf.org/standards/smbios for details.
	270
	271	config SMBIOS_MANUFACTURER
	272	string "SMBIOS Manufacturer"
	273	depends on GENERATE_SMBIOS_TABLE
	274	default SYS_VENDOR
	275	help
	276	The board manufacturer to store in SMBIOS structures.
	277	Change this to override the default one (CONFIG_SYS_VENDOR).
	278
	279	config SMBIOS_PRODUCT_NAME
	280	string "SMBIOS Product Name"
	281	depends on GENERATE_SMBIOS_TABLE
	282	default SYS_BOARD
	283	help
	284	The product name to store in SMBIOS structures.
	285	Change this to override the default one (CONFIG_SYS_BOARD).
	286
	287	endmenu
	288
867a6ac8	289	source lib/efi/Kconfig
ed980b8c	290	source lib/efi_loader/Kconfig
867a6ac8	291
ed36323f	292	endmenu