1 menu "Library routines"
3 config CC_OPTIMIZE_LIBS_FOR_SPEED
4 bool "Optimize libraries for speed"
6 Enabling this option will pass "-O2" to gcc when compiling
11 config HAVE_PRIVATE_LIBGCC
14 config USE_PRIVATE_LIBGCC
15 bool "Use private libgcc"
16 depends on HAVE_PRIVATE_LIBGCC
17 default y if HAVE_PRIVATE_LIBGCC && ((ARM && !ARM64) || MIPS)
19 This option allows you to use the built-in libgcc implementation
20 of U-Boot instead of the one provided by the compiler.
27 The frequency of the timer returned by get_timer().
28 get_timer() must operate in milliseconds and this option must be
31 config USE_TINY_PRINTF
32 bool "Enable tiny printf() version"
34 This option enables a tiny, stripped down printf version.
35 This should only be used in space limited environments,
36 like SPL versions with hard memory limits. This version
37 reduces the code size by about 2.5KiB on armv7.
39 The supported format specifiers are %c, %s, %u/%d and %x.
42 bool "Enable regular expression support"
45 If this variable is defined, U-Boot is linked against the
46 SLRE (Super Light Regular Expression) library, which adds
47 regex support to some commands, for example "env grep" and
51 bool "Pseudo-random library support "
53 This library provides pseudo-random number generator functions.
55 config SPL_TINY_MEMSET
56 bool "Use a very small memset() in SPL"
58 The faster memset() is the arch-specific one (if available) enabled
59 by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
60 better performance by writing a word at a time. But in very
61 size-constrained envrionments even this may be too big. Enable this
62 option to reduce code size slightly at the cost of some speed.
67 source lib/dhry/Kconfig
69 menu "Security support"
72 bool "Support the AES algorithm"
74 This provides a means to encrypt and decrypt data using the AES
75 (Advanced Encryption Standard). This algorithm uses a symetric key
76 and is widely used as a streaming cipher. Different key lengths are
77 supported by the algorithm but only a 128-bit key is supported at
80 source lib/rsa/Kconfig
83 bool "Trusted Platform Module (TPM) Support"
86 This enables support for TPMs which can be used to provide security
87 features for your board. The TPM can be connected via LPC or I2C
88 and a sandbox TPM is provided for testing purposes. Use the 'tpm'
89 command to interactive the TPM. Driver model support is provided
90 for the low-level TPM interface, but only one TPM is supported at
91 a time by the TPM library.
95 menu "Hashing Support"
98 bool "Enable SHA1 support"
100 This option enables support of hashing using SHA1 algorithm.
101 The hash is calculated in software.
102 The SHA1 algorithm produces a 160-bit (20-byte) hash value
106 bool "Enable SHA256 support"
108 This option enables support of hashing using SHA256 algorithm.
109 The hash is calculated in software.
110 The SHA256 algorithm produces a 256-bit (32-byte) hash value
114 bool "Enable hashing using hardware"
116 This option enables hardware acceleration
117 for SHA1/SHA256 hashing.
118 This affects the 'hash' command and also the
119 hash_lookup_algo() function.
121 config SHA_PROG_HW_ACCEL
122 bool "Enable Progressive hashing support using hardware"
123 depends on SHA_HW_ACCEL
125 This option enables hardware-acceleration for
126 SHA1/SHA256 progressive hashing.
127 Data can be streamed in a block at a time and the hashing
128 is performed in hardware.
135 menu "Compression Support"
138 bool "Enable LZ4 decompression support"
140 If this option is set, support for LZ4 compressed images
141 is included. The LZ4 algorithm can run in-place as long as the
142 compressed image is loaded to the end of the output buffer, and
143 trades lower compression ratios for much faster decompression.
145 NOTE: This implements the release version of the LZ4 frame
146 format as generated by default by the 'lz4' command line tool.
147 This is not the same as the outdated, less efficient legacy
148 frame format currently (2015) implemented in the Linux kernel
149 (generated by 'lz4 -l'). The two formats are incompatible.
152 bool "Enable LZMA decompression support"
154 This enables support for LZMA (Lempel-Ziv-Markov chain algorithm),
155 a dictionary compression algorithm that provides a high compression
156 ratio and fairly fast decompression speed. See also
157 CONFIG_CMD_LZMADEC which provides a decode command.
164 bool "Enable function for getting errno-related string message"
166 The function errno_str(int errno), returns a pointer to the errno
167 corresponding text message:
168 - if errno is null or positive number - a pointer to "Success" message
169 - if errno is negative - a pointer to errno related message
172 bool "Enable the FDT library"
173 default y if OF_CONTROL
175 This enables the FDT library (libfdt). It provides functions for
176 accessing binary device tree images in memory, such as adding and
177 removing notes and properties, scanning through the tree and finding
178 particular compatible nodes. The library operates on a flattened
179 version of the device tree.
181 config OF_LIBFDT_OVERLAY
182 bool "Enable the FDT library overlay support"
184 This enables the FDT library (libfdt) overlay support.
187 bool "Enable the FDT library for SPL"
188 default y if SPL_OF_CONTROL
190 This enables the FDT library (libfdt). It provides functions for
191 accessing binary device tree images in memory, such as adding and
192 removing notes and properties, scanning through the tree and finding
193 particular compatible nodes. The library operates on a flattened
194 version of the device tree.
196 config FDT_FIXUP_PARTITIONS
197 bool "overwrite MTD partitions in DTS through defined in 'mtdparts'"
201 Allow overwriting defined partitions in the device tree blob
202 using partition info defined in the 'mtdparts' environment
206 depends on (!EFI && !SYS_COREBOOT) || (ARM && EFI_LOADER)
208 config GENERATE_SMBIOS_TABLE
209 bool "Generate an SMBIOS (System Management BIOS) table"
211 depends on X86 || EFI_LOADER
213 The System Management BIOS (SMBIOS) specification addresses how
214 motherboard and system vendors present management information about
215 their products in a standard format by extending the BIOS interface
216 on Intel architecture systems.
218 Check http://www.dmtf.org/standards/smbios for details.
220 config SMBIOS_MANUFACTURER
221 string "SMBIOS Manufacturer"
222 depends on GENERATE_SMBIOS_TABLE
225 The board manufacturer to store in SMBIOS structures.
226 Change this to override the default one (CONFIG_SYS_VENDOR).
228 config SMBIOS_PRODUCT_NAME
229 string "SMBIOS Product Name"
230 depends on GENERATE_SMBIOS_TABLE
233 The product name to store in SMBIOS structures.
234 Change this to override the default one (CONFIG_SYS_BOARD).
238 source lib/efi/Kconfig
239 source lib/efi_loader/Kconfig