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
24 config USE_PRIVATE_LIBGCC
25 bool "Use private libgcc"
26 depends on HAVE_PRIVATE_LIBGCC
27 default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
29 This option allows you to use the built-in libgcc implementation
30 of U-Boot instead of the one provided by the compiler.
37 The frequency of the timer returned by get_timer().
38 get_timer() must operate in milliseconds and this option must be
41 config USE_TINY_PRINTF
42 bool "Enable tiny printf() version"
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.
49 The supported format specifiers are %c, %s, %u/%d and %x.
52 bool "Do not reset the system on fatal error"
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
62 bool "Enable regular expression support"
63 default n if ARCH_SUNXI
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
72 prompt "Pseudo-random library support type"
73 depends on NET_RANDOM_ETHADDR || RANDOM_UUID || CMD_UUID
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.
81 bool "Pseudo-random library support"
84 bool "HW Engine for random libray support"
88 config SPL_TINY_MEMSET
89 bool "Use a very small memset() in SPL"
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.
97 config TPL_TINY_MEMSET
98 bool "Use a very small memset() in TPL"
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.
110 bool "Bit reverse library from Linux"
112 source lib/dhry/Kconfig
114 menu "Security support"
117 bool "Support the AES algorithm"
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
125 source lib/rsa/Kconfig
128 bool "Trusted Platform Module (TPM) Support"
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.
140 menu "Hashing Support"
143 bool "Enable SHA1 support"
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
151 bool "Enable SHA256 support"
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
159 bool "Enable hashing using hardware"
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.
166 config SHA_PROG_HW_ACCEL
167 bool "Enable Progressive hashing support using hardware"
168 depends on SHA_HW_ACCEL
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.
183 menu "Compression Support"
186 bool "Enable LZ4 decompression support"
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.
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.
200 bool "Enable LZMA decompression support"
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.
208 bool "Enable LZO decompression support"
210 This enables support for LZO compression algorithm.r
213 bool "Enable LZO decompression support in SPL"
215 This enables support for LZO compression algorithm in the SPL.
218 bool "Enable gzip decompression support for SPL build"
221 This enables support for GZIP compression altorithm for SPL boot.
226 This enables compression lib for SPL boot.
231 bool "Enable function for getting errno-related string message"
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
239 bool "Enable the FDT library"
240 default y if OF_CONTROL
242 This enables the FDT library (libfdt). It provides functions for
243 accessing binary device tree images in memory, such as adding and
244 removing nodes and properties, scanning through the tree and finding
245 particular compatible nodes. The library operates on a flattened
246 version of the device tree.
248 config OF_LIBFDT_OVERLAY
249 bool "Enable the FDT library overlay support"
251 This enables the FDT library (libfdt) overlay support.
254 bool "Enable the FDT library for SPL"
255 default y if SPL_OF_CONTROL
257 This enables the FDT library (libfdt). It provides functions for
258 accessing binary device tree images in memory, such as adding and
259 removing nodes and properties, scanning through the tree and finding
260 particular compatible nodes. The library operates on a flattened
261 version of the device tree.
263 config FDT_FIXUP_PARTITIONS
264 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
268 Allow overwriting defined partitions in the device tree blob
269 using partition info defined in the 'mtdparts' environment
273 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
275 config GENERATE_SMBIOS_TABLE
276 bool "Generate an SMBIOS (System Management BIOS) table"
278 depends on X86 || EFI_LOADER
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.
285 Check http://www.dmtf.org/standards/smbios for details.
287 config SMBIOS_MANUFACTURER
288 string "SMBIOS Manufacturer"
289 depends on GENERATE_SMBIOS_TABLE
292 The board manufacturer to store in SMBIOS structures.
293 Change this to override the default one (CONFIG_SYS_VENDOR).
295 config SMBIOS_PRODUCT_NAME
296 string "SMBIOS Product Name"
297 depends on GENERATE_SMBIOS_TABLE
300 The product name to store in SMBIOS structures.
301 Change this to override the default one (CONFIG_SYS_BOARD).
305 source lib/efi/Kconfig
306 source lib/efi_loader/Kconfig