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https://xff.cz/git/u-boot/
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7d9cde1031
This patch adds a small printf() version that supports all basic formats. Its intented to be used in U-Boot SPL versions on platforms with very limited internal RAM sizes. To enable it, just define CONFIG_USE_TINY_PRINTF in your defconfig. This will result in the SPL using this tiny function and the main U-Boot still using the full-blown printf() function. This code was copied from: http://www.sparetimelabs.com/printfrevisited With mostly only coding style related changes so that its checkpatch clean. The size reduction is about 2.5KiB. Here a comparison for the db-mv784mp-gp (Marvell AXP) SPL: Without this patch: 58963 18536 1928 79427 13643 ./spl/u-boot-spl With this patch: 56542 18536 1956 77034 12cea ./spl/u-boot-spl Note: To make it possible to compile tiny-printf.c instead of vsprintf.c when CONFIG_USE_TINY_PRINTF is defined, the functions printf() and vprintf() are moved from common/console.c into vsprintf.c in this patch. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Tom Rini <trini@konsulko.com> Cc: Albert Aribaud <albert.u.boot@aribaud.net>
143 lines
4.2 KiB
Plaintext
143 lines
4.2 KiB
Plaintext
menu "Library routines"
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config CC_OPTIMIZE_LIBS_FOR_SPEED
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bool "Optimize libraries for speed"
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help
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Enabling this option will pass "-O2" to gcc when compiling
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under "lib" directory.
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If unsure, say N.
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config HAVE_PRIVATE_LIBGCC
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bool
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config USE_PRIVATE_LIBGCC
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bool "Use private libgcc"
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depends on HAVE_PRIVATE_LIBGCC
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help
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This option allows you to use the built-in libgcc implementation
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of U-boot instead of the one privided by the compiler.
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If unsure, say N.
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config SYS_HZ
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int
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default 1000
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help
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The frequency of the timer returned by get_timer().
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get_timer() must operate in milliseconds and this option must be
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set to 1000.
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config SYS_VSNPRINTF
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bool "Enable safe version of sprintf()"
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help
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Since sprintf() can overflow its buffer, it is common to use
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snprintf() instead, which knows the buffer size and can avoid
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overflow. However, this does increase code size slightly (for
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Thumb-2, about 420 bytes). Enable this option for safety when
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using sprintf() with data you do not control.
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config USE_TINY_PRINTF
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bool "Enable tiny printf() version"
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help
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This option enables a tiny, stripped down printf version.
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This should only be used in space limited environments,
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like SPL versions with hard memory limits. This version
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reduces the code size by about 2.5KiB on armv7.
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The supported format specifiers are %c, %s, %u/%d and %x.
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config REGEX
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bool "Enable regular expression support"
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default y if NET
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help
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If this variable is defined, U-Boot is linked against the
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SLRE (Super Light Regular Expression) library, which adds
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regex support to some commands, for example "env grep" and
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"setexpr".
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config LIB_RAND
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bool "Pseudo-random library support "
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help
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This library provides pseudo-random number generator functions.
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source lib/dhry/Kconfig
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source lib/rsa/Kconfig
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config TPM
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bool "Trusted Platform Module (TPM) Support"
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depends on DM
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help
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This enables support for TPMs which can be used to provide security
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features for your board. The TPM can be connected via LPC or I2C
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and a sandbox TPM is provided for testing purposes. Use the 'tpm'
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command to interactive the TPM. Driver model support is provided
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for the low-level TPM interface, but only one TPM is supported at
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a time by the TPM library.
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menu "Hashing Support"
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config SHA1
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bool "Enable SHA1 support"
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help
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This option enables support of hashing using SHA1 algorithm.
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The hash is calculated in software.
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The SHA1 algorithm produces a 160-bit (20-byte) hash value
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(digest).
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config SHA256
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bool "Enable SHA256 support"
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help
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This option enables support of hashing using SHA256 algorithm.
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The hash is calculated in software.
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The SHA256 algorithm produces a 256-bit (32-byte) hash value
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(digest).
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config SHA_HW_ACCEL
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bool "Enable hashing using hardware"
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help
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This option enables hardware acceleration
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for SHA1/SHA256 hashing.
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This affects the 'hash' command and also the
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hash_lookup_algo() function.
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config SHA_PROG_HW_ACCEL
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bool "Enable Progressive hashing support using hardware"
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depends on SHA_HW_ACCEL
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help
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This option enables hardware-acceleration for
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SHA1/SHA256 progressive hashing.
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Data can be streamed in a block at a time and the hashing
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is performed in hardware.
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endmenu
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menu "Compression Support"
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config LZ4
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bool "Enable LZ4 decompression support"
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help
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If this option is set, support for LZ4 compressed images
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is included. The LZ4 algorithm can run in-place as long as the
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compressed image is loaded to the end of the output buffer, and
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trades lower compression ratios for much faster decompression.
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NOTE: This implements the release version of the LZ4 frame
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format as generated by default by the 'lz4' command line tool.
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This is not the same as the outdated, less efficient legacy
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frame format currently (2015) implemented in the Linux kernel
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(generated by 'lz4 -l'). The two formats are incompatible.
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endmenu
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config ERRNO_STR
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bool "Enable function for getting errno-related string message"
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help
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The function errno_str(int errno), returns a pointer to the errno
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corresponding text message:
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- if errno is null or positive number - a pointer to "Success" message
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- if errno is negative - a pointer to errno related message
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source lib/efi/Kconfig
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endmenu
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