Newer
Older
#
# 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"
# Allow defaults in arch-specific code to override any given here
source "arch/Kconfig"
config LOCALVERSION
string "Local version - append to U-Boot release"
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"
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"
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.
config SYS_MALLOC_F
bool "Enable malloc() pool before relocation"
help
Before relocation memory is very limited on many platforms. Still,
we can provide a small malloc() pool if needed. Driver model in
particular needs this to operate, so that it can allocate the
initial serial device and any others that are needed.
config SYS_MALLOC_F_LEN
hex "Size of malloc() pool before relocation"
depends on SYS_MALLOC_F
default 0x400
help
Before relocation memory is very limited on many platforms. Still,
we can provide a small malloc() pool if needed. Driver model in
particular needs this to operate, so that it can allocate the
initial serial device and any others that are needed.
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"
help
If you want to build SPL as well as the normal image, say Y.
config SPL_SYS_MALLOC_SIMPLE
bool
depends on SPL
prompt "Only use malloc_simple functions in the spl"
help
Say Y here to only use the *_simple malloc functions from
malloc_simple.c, rather then using the versions from dlmalloc.c
this will make the SPL binary smaller at the cost of more heap
usage as the *_simple malloc functions do not re-use free-ed mem.
config SPL_STACK_R
depends on SPL
bool "Enable SDRAM location for SPL stack"
help
SPL starts off execution in SRAM and thus typically has only a small
stack available. Since SPL sets up DRAM while in its board_init_f()
function, it is possible for the stack to move there before
board_init_r() is reached. This option enables a special SDRAM
location for the SPL stack. U-Boot SPL switches to this after
board_init_f() completes, and before board_init_r() starts.
config SPL_STACK_R_ADDR
depends on SPL_STACK_R
hex "SDRAM location for SPL stack"
help
Specify the address in SDRAM for the SPL stack. This will be set up
before board_init_r() is called.
config SPL_STACK_R_MALLOC_SIMPLE_LEN
depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
hex "Size of malloc_simple heap after switching to DRAM SPL stack"
default 0x100000
help
Specify the amount of the stack to use as memory pool for
malloc_simple after switching the stack to DRAM. This may be set
to give board_init_r() a larger heap then the initial heap in
SRAM which is limited to SYS_MALLOC_F_LEN bytes.
help
If you want to build TPL as well as the normal image and SPL, say Y.
config FIT
bool "Support Flattened Image Tree"
help
This option allows to boot the new uImage structrure,
Flattened Image Tree. FIT is formally a FDT, which can include
images of various types (kernel, FDT blob, ramdisk, etc.)
in a single blob. To boot this new uImage structure,
pass the address of the blob to the "bootm" command.
config FIT_VERBOSE
bool "Display verbose messages on FIT boot"
depends on FIT
config FIT_SIGNATURE
bool "Enable signature verification of FIT uImages"
help
This option enables signature verification of FIT uImages,
using a hash signed and verified using RSA. If
CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
hashing is available using hardware, RSA library will use it.
See doc/uImage.FIT/signature.txt for more details.
config SYS_EXTRA_OPTIONS
string "Extra Options (DEPRECATED)"
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.
depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP
hex "Text Base"
help
TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture
depends on ARC || ARCH_SUNXI
int "CPU clock frequency"
help
TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
endmenu # Boot images
source "net/Kconfig"
source "drivers/Kconfig"
source "fs/Kconfig"
source "lib/Kconfig"