1 menu "Library routines"
4 bool "Enable Software based BCH ECC"
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.
10 config CC_OPTIMIZE_LIBS_FOR_SPEED
11 bool "Optimize libraries for speed"
13 Enabling this option will pass "-O2" to gcc when compiling
14 under "lib" directory.
18 config HAVE_PRIVATE_LIBGCC
21 config USE_PRIVATE_LIBGCC
22 bool "Use private libgcc"
23 depends on HAVE_PRIVATE_LIBGCC
24 default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
26 This option allows you to use the built-in libgcc implementation
27 of U-Boot instead of the one provided by the compiler.
34 The frequency of the timer returned by get_timer().
35 get_timer() must operate in milliseconds and this option must be
38 config USE_TINY_PRINTF
39 bool "Enable tiny printf() version"
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.
46 The supported format specifiers are %c, %s, %u/%d and %x.
49 bool "Do not reset the system on fatal error"
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
59 bool "Enable regular expression support"
60 default n if ARCH_SUNXI
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
69 prompt "Pseudo-random library support type"
70 depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID
73 Select the library to provide pseudo-random number generator
74 functions. LIB_HW_RAND supports certain hardware engines that
75 provide this functionality. If in doubt, select LIB_RAND.
78 bool "Pseudo-random library support"
81 bool "HW Engine for random libray support"
85 config SPL_TINY_MEMSET
86 bool "Use a very small memset() in SPL"
88 The faster memset() is the arch-specific one (if available) enabled
89 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
90 better performance by writing a word at a time. But in very
91 size-constrained envrionments even this may be too big. Enable this
92 option to reduce code size slightly at the cost of some speed.
94 config TPL_TINY_MEMSET
95 bool "Use a very small memset() in TPL"
97 The faster memset() is the arch-specific one (if available) enabled
98 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
99 better performance by writing a word at a time. But in very
100 size-constrained envrionments even this may be too big. Enable this
101 option to reduce code size slightly at the cost of some speed.
107 bool "Bit reverse library from Linux"
109 source lib/dhry/Kconfig
111 menu "Security support"
114 bool "Support the AES algorithm"
116 This provides a means to encrypt and decrypt data using the AES
117 (Advanced Encryption Standard). This algorithm uses a symetric key
118 and is widely used as a streaming cipher. Different key lengths are
119 supported by the algorithm but only a 128-bit key is supported at
122 source lib/rsa/Kconfig
125 bool "Trusted Platform Module (TPM) Support"
128 This enables support for TPMs which can be used to provide security
129 features for your board. The TPM can be connected via LPC or I2C
130 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
131 command to interactive the TPM. Driver model support is provided
132 for the low-level TPM interface, but only one TPM is supported at
133 a time by the TPM library.
137 menu "Hashing Support"
140 bool "Enable SHA1 support"
142 This option enables support of hashing using SHA1 algorithm.
143 The hash is calculated in software.
144 The SHA1 algorithm produces a 160-bit (20-byte) hash value
148 bool "Enable SHA256 support"
150 This option enables support of hashing using SHA256 algorithm.
151 The hash is calculated in software.
152 The SHA256 algorithm produces a 256-bit (32-byte) hash value
156 bool "Enable hashing using hardware"
158 This option enables hardware acceleration
159 for SHA1/SHA256 hashing.
160 This affects the 'hash' command and also the
161 hash_lookup_algo() function.
163 config SHA_PROG_HW_ACCEL
164 bool "Enable Progressive hashing support using hardware"
165 depends on SHA_HW_ACCEL
167 This option enables hardware-acceleration for
168 SHA1/SHA256 progressive hashing.
169 Data can be streamed in a block at a time and the hashing
170 is performed in hardware.
180 menu "Compression Support"
183 bool "Enable LZ4 decompression support"
185 If this option is set, support for LZ4 compressed images
186 is included. The LZ4 algorithm can run in-place as long as the
187 compressed image is loaded to the end of the output buffer, and
188 trades lower compression ratios for much faster decompression.
190 NOTE: This implements the release version of the LZ4 frame
191 format as generated by default by the 'lz4' command line tool.
192 This is not the same as the outdated, less efficient legacy
193 frame format currently (2015) implemented in the Linux kernel
194 (generated by 'lz4 -l'). The two formats are incompatible.
197 bool "Enable LZMA decompression support"
199 This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
200 a dictionary compression algorithm that provides a high compression
201 ratio and fairly fast decompression speed. See also
202 CONFIG_CMD_LZMADEC which provides a decode command.
205 bool "Enable LZO decompression support"
207 This enables support for LZO compression algorithm.r
210 bool "Enable LZO decompression support in SPL"
212 This enables support for LZO compression algorithm in the SPL.
215 bool "Enable gzip decompression support for SPL build"
218 This enables support for GZIP compression altorithm for SPL boot.
223 This enables compression lib for SPL boot.
228 bool "Enable function for getting errno-related string message"
230 The function errno_str(int errno), returns a pointer to the errno
231 corresponding text message:
232 - if errno is null or positive number - a pointer to "Success" message
233 - if errno is negative - a pointer to errno related message
236 bool "Enable the FDT library"
237 default y if OF_CONTROL
239 This enables the FDT library (libfdt). It provides functions for
240 accessing binary device tree images in memory, such as adding and
241 removing nodes and properties, scanning through the tree and finding
242 particular compatible nodes. The library operates on a flattened
243 version of the device tree.
245 config OF_LIBFDT_OVERLAY
246 bool "Enable the FDT library overlay support"
248 This enables the FDT library (libfdt) overlay support.
251 bool "Enable the FDT library for SPL"
252 default y if SPL_OF_CONTROL
254 This enables the FDT library (libfdt). It provides functions for
255 accessing binary device tree images in memory, such as adding and
256 removing nodes and properties, scanning through the tree and finding
257 particular compatible nodes. The library operates on a flattened
258 version of the device tree.
260 config FDT_FIXUP_PARTITIONS
261 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
265 Allow overwriting defined partitions in the device tree blob
266 using partition info defined in the 'mtdparts' environment
270 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
272 config GENERATE_SMBIOS_TABLE
273 bool "Generate an SMBIOS (System Management BIOS) table"
275 depends on X86 || EFI_LOADER
277 The System Management BIOS (SMBIOS) specification addresses how
278 motherboard and system vendors present management information about
279 their products in a standard format by extending the BIOS interface
280 on Intel architecture systems.
282 Check http://www.dmtf.org/standards/smbios for details.
284 config SMBIOS_MANUFACTURER
285 string "SMBIOS Manufacturer"
286 depends on GENERATE_SMBIOS_TABLE
289 The board manufacturer to store in SMBIOS structures.
290 Change this to override the default one (CONFIG_SYS_VENDOR).
292 config SMBIOS_PRODUCT_NAME
293 string "SMBIOS Product Name"
294 depends on GENERATE_SMBIOS_TABLE
297 The product name to store in SMBIOS structures.
298 Change this to override the default one (CONFIG_SYS_BOARD).
302 source lib/efi/Kconfig
303 source lib/efi_loader/Kconfig