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Kconfig
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Kconfig
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#
# For a description of the syntax of this configuration file,
# see Documentation/kbuild/kconfig-language.txt.
#
mainmenu "U-Boot $UBOOTVERSION Configuration"
config UBOOTVERSION
string
option env="UBOOTVERSION"
config KCONFIG_OBJDIR
string
option env="KCONFIG_OBJDIR"
menu "General setup"
config LOCALVERSION
string "Local version - append to U-Boot release"
depends on !SPL_BUILD
help
Append an extra string to the end of your U-Boot version.
This will show up on your boot log, for example.
The string you set here will be appended after the contents of
any files with a filename matching localversion* in your
object and source tree, in that order. Your total string can
be a maximum of 64 characters.
config LOCALVERSION_AUTO
bool "Automatically append version information to the version string"
depends on !SPL_BUILD
default y
help
This will try to automatically determine if the current tree is a
release tree by looking for git tags that belong to the current
top of tree revision.
A string of the format -gxxxxxxxx will be added to the localversion
if a git-based tree is found. The string generated by this will be
appended after any matching localversion* files, and after the value
set in CONFIG_LOCALVERSION.
(The actual string used here is the first eight characters produced
by running the command:
$ git rev-parse --verify HEAD
which is done within the script "scripts/setlocalversion".)
config CC_OPTIMIZE_FOR_SIZE
bool "Optimize for size"
depends on !SPL_BUILD
default y
help
Enabling this option will pass "-Os" instead of "-O2" to gcc
resulting in a smaller U-Boot image.
This option is enabled by default for U-Boot.
menuconfig EXPERT
bool "Configure standard U-Boot features (expert users)"
default y
help
This option allows certain base U-Boot options and settings
to be disabled or tweaked. This is for specialized
environments which can tolerate a "non-standard" U-Boot.
Only use this if you really know what you are doing.
if EXPERT
config SYS_MALLOC_CLEAR_ON_INIT
bool "Init with zeros the memory reserved for malloc (slow)"
default y
help
This setting is enabled by default. The reserved malloc
memory is initialized with zeros, so first malloc calls
will return the pointer to the zeroed memory. But this
slows the boot time.
It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
Then the boot time can be significantly reduced.
Warning:
When disabling this, please check if malloc calls, maybe
should be replaced by calloc - if expects zeroed memory.
endif
endmenu # General setup
menu "Boot images"
config SPL_BUILD
bool
depends on $KCONFIG_OBJDIR="spl" || $KCONFIG_OBJDIR="tpl"
default y
config TPL_BUILD
bool
depends on $KCONFIG_OBJDIR="tpl"
default y
config SPL
bool
prompt "Enable SPL" if !SPL_BUILD
default y if SPL_BUILD
help
If you want to build SPL as well as the normal image, say Y.
config TPL
bool
depends on SPL
prompt "Enable TPL" if !SPL_BUILD
default y if TPL_BUILD
default n
help
If you want to build TPL as well as the normal image and SPL, say Y.
config SYS_EXTRA_OPTIONS
string "Extra Options (DEPRECATED)"
depends on !SPL_BUILD
help
The old configuration infrastructure (= mkconfig + boards.cfg)
provided the extra options field. If you have something like
"HAS_BAR,BAZ=64", the optional options
#define CONFIG_HAS
#define CONFIG_BAZ 64
will be defined in include/config.h.
This option was prepared for the smooth migration from the old
configuration to Kconfig. Since this option will be removed sometime,
new boards should not use this option.
endmenu # Boot images
source "arch/Kconfig"
source "common/Kconfig"
source "dts/Kconfig"
source "net/Kconfig"
source "drivers/Kconfig"
source "fs/Kconfig"
source "lib/Kconfig"