mirror of
https://github.com/smaeul/u-boot.git
synced 2025-10-31 03:58:17 +00:00
ddf67f7135
The device tree overlays are a good way to deal with user-modifyable boards or boards with some kind of an expansion mechanism where we can easily plug new board in (like the BBB, the Raspberry Pi or the CHIP). Add a new function to merge overlays with a base device tree. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
161 lines
4.9 KiB
Plaintext
161 lines
4.9 KiB
Plaintext
menu "Library routines"
|
|
|
|
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.
|
|
|
|
source lib/dhry/Kconfig
|
|
|
|
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.
|
|
|
|
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.
|
|
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.
|
|
|
|
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 notes 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 notes and properties, scanning through the tree and finding
|
|
particular compatible nodes. The library operates on a flattened
|
|
version of the device tree.
|
|
|
|
source lib/efi/Kconfig
|
|
source lib/efi_loader/Kconfig
|
|
|
|
endmenu
|