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Kconfig
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Kconfig
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menu "Boot options"
menu "Boot images"
config ANDROID_BOOT_IMAGE
bool "Enable support for Android Boot Images"
default y if FASTBOOT
help
This enables support for booting images which use the Android
image format header.
config FIT
bool "Support Flattened Image Tree"
select HASH
select MD5
select SHA1
imply SHA256
help
This option allows you to boot the new uImage structure,
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.
FIT is very flexible, supporting compression, multiple images,
multiple configurations, verification through hashing and also
verified boot (secure boot using RSA).
config TIMESTAMP
bool "Show image date and time when displaying image information"
default y if CMD_DATE
help
When CONFIG_TIMESTAMP is selected, the timestamp (date and time) of
an image is printed by image commands like bootm or iminfo. This
is shown as 'Timestamp: xxx' and 'Created: xxx'. If this option is
enabled, then U-Boot requires FITs to have a timestamp. If a FIT is
loaded that does not, the message 'Wrong FIT format: no timestamp'
is shown.
config FIT_EXTERNAL_OFFSET
hex "FIT external data offset"
depends on FIT
default 0x0
help
This specifies a data offset in fit image.
The offset is from data payload offset to the beginning of
fit image header. When specifies a offset, specific data
could be put in the hole between data payload and fit image
header, such as CSF data on i.MX platform.
config FIT_FULL_CHECK
bool "Do a full check of the FIT before using it"
depends on FIT
default y
help
Enable this do a full check of the FIT to make sure it is valid. This
helps to protect against carefully crafted FITs which take advantage
of bugs or omissions in the code. This includes a bad structure,
multiple root nodes and the like.
config FIT_SIGNATURE
bool "Enable signature verification of FIT uImages"
depends on DM && FIT
select HASH
imply RSA
imply RSA_VERIFY
select IMAGE_SIGN_INFO
select FIT_FULL_CHECK
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, then the RSA library will use
it. See doc/uImage.FIT/signature.txt for more details.
WARNING: When relying on signed FIT images with a required signature
check the legacy image format is disabled by default, so that
unsigned images cannot be loaded. If a board needs the legacy image
format support in this case, enable it using
CONFIG_LEGACY_IMAGE_FORMAT.
config FIT_SIGNATURE_MAX_SIZE
hex "Max size of signed FIT structures"
depends on FIT_SIGNATURE
default 0x10000000
help
This option sets a max size in bytes for verified FIT uImages.
A sane value of 256MB protects corrupted DTB structures from overlapping
device memory. Assure this size does not extend past expected storage
space.
config FIT_RSASSA_PSS
bool "Support rsassa-pss signature scheme of FIT image contents"
depends on FIT_SIGNATURE
help
Enable this to support the pss padding algorithm as described
in the rfc8017 (https://tools.ietf.org/html/rfc8017).
config FIT_CIPHER
bool "Enable ciphering data in a FIT uImages"
depends on DM && FIT
select AES
help
Enable the feature of data ciphering/unciphering in the tool mkimage
and in the u-boot support of the FIT image.
config FIT_VERBOSE
bool "Show verbose messages when FIT images fail"
depends on FIT
help
Generally a system will have valid FIT images so debug messages
are a waste of code space. If you are debugging your images then
you can enable this option to get more verbose information about
failures.
config FIT_BEST_MATCH
bool "Select the best match for the kernel device tree"
depends on FIT
help
When no configuration is explicitly selected, default to the
one whose fdt's compatibility field best matches that of
U-Boot itself. A match is considered "best" if it matches the
most specific compatibility entry of U-Boot's fdt's root node.
The order of entries in the configuration's fdt is ignored.
config FIT_IMAGE_POST_PROCESS
bool "Enable post-processing of FIT artifacts after loading by U-Boot"
depends on FIT
depends on SOCFPGA_SECURE_VAB_AUTH
help
Allows doing any sort of manipulation to blobs after they got extracted
from FIT images like stripping off headers or modifying the size of the
blob, verification, authentication, decryption etc. in a platform or
board specific way. In order to use this feature a platform or board-
specific implementation of board_fit_image_post_process() must be
provided. Also, anything done during this post-processing step would
need to be comprehended in how the images were prepared before being
injected into the FIT creation (i.e. the blobs would have been pre-
processed before being added to the FIT image).
config FIT_PRINT
bool "Support FIT printing"
depends on FIT
default y
help
Support printing the content of the fitImage in a verbose manner.
config SPL_FIT
bool "Support Flattened Image Tree within SPL"
depends on SPL && FIT
select SPL_HASH
select SPL_OF_LIBFDT
config SPL_FIT_PRINT
bool "Support FIT printing within SPL"
depends on SPL_FIT
help
Support printing the content of the fitImage in a verbose manner in SPL.
config SPL_FIT_FULL_CHECK
bool "Do a full check of the FIT before using it"
depends on SPL_FIT
help
Enable this do a full check of the FIT to make sure it is valid. This
helps to protect against carefully crafted FITs which take advantage
of bugs or omissions in the code. This includes a bad structure,
multiple root nodes and the like.
config SPL_FIT_SIGNATURE
bool "Enable signature verification of FIT firmware within SPL"
depends on SPL_DM
depends on SPL_LOAD_FIT || SPL_LOAD_FIT_FULL
select FIT_SIGNATURE
select SPL_FIT
select SPL_CRYPTO
select SPL_HASH
imply SPL_RSA
imply SPL_RSA_VERIFY
select SPL_IMAGE_SIGN_INFO
select SPL_FIT_FULL_CHECK
config SPL_FIT_SIGNATURE_MAX_SIZE
hex "Max size of signed FIT structures in SPL"
depends on SPL_FIT_SIGNATURE
default 0x10000000
help
This option sets a max size in bytes for verified FIT uImages.
A sane value of 256MB protects corrupted DTB structures from overlapping
device memory. Assure this size does not extend past expected storage
space.
config SPL_FIT_RSASSA_PSS
bool "Support rsassa-pss signature scheme of FIT image contents in SPL"
depends on SPL_FIT_SIGNATURE
help
Enable this to support the pss padding algorithm as described
in the rfc8017 (https://tools.ietf.org/html/rfc8017) in SPL.
config SPL_LOAD_FIT
bool "Enable SPL loading U-Boot as a FIT (basic fitImage features)"
depends on SPL && FIT
select SPL_FIT
help
Normally with the SPL framework a legacy image is generated as part
of the build. This contains U-Boot along with information as to
where it should be loaded. This option instead enables generation
of a FIT (Flat Image Tree) which provides more flexibility. In
particular it can handle selecting from multiple device tree
and passing the correct one to U-Boot.
This path has the following limitations:
1. "loadables" images, other than FDTs, which do not have a "load"
property will not be loaded. This limitation also applies to FPGA
images with the correct "compatible" string.
2. For FPGA images, the supported "compatible" list is in the
doc/uImage.FIT/source_file_format.txt.
3. FDTs are only loaded for images with an "os" property of "u-boot".
"linux" images are also supported with Falcon boot mode.
config SPL_LOAD_FIT_ADDRESS
hex "load address of fit image"
depends on SPL_LOAD_FIT || SPL_RAM_SUPPORT || TPL_RAM_SUPPORT
default 0x0
help
Specify the load address of the fit image that will be loaded
by SPL.
config SPL_LOAD_FIT_APPLY_OVERLAY
bool "Enable SPL applying DT overlays from FIT"
depends on SPL_LOAD_FIT
select OF_LIBFDT_OVERLAY
help
The device tree is loaded from the FIT image. Allow the SPL to
also load device-tree overlays from the FIT image an apply them
over the device tree.
config SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ
depends on SPL_LOAD_FIT_APPLY_OVERLAY
default 0x10000
hex "size of temporary buffer used to load the overlays"
help
The size of the area where the overlays will be loaded and
uncompress. Must be at least as large as biggest overlay
(uncompressed)
config SPL_LOAD_FIT_FULL
bool "Enable SPL loading U-Boot as a FIT (full fitImage features)"
depends on FIT
select SPL_FIT
help
Normally with the SPL framework a legacy image is generated as part
of the build. This contains U-Boot along with information as to
where it should be loaded. This option instead enables generation
of a FIT (Flat Image Tree) which provides more flexibility. In
particular it can handle selecting from multiple device tree
and passing the correct one to U-Boot.
config SPL_FIT_IMAGE_POST_PROCESS
bool "Enable post-processing of FIT artifacts after loading by the SPL"
depends on SPL_LOAD_FIT
default y if TI_SECURE_DEVICE
help
Allows doing any sort of manipulation to blobs after they got extracted
from the U-Boot FIT image like stripping off headers or modifying the
size of the blob, verification, authentication, decryption etc. in a
platform or board specific way. In order to use this feature a platform
or board-specific implementation of board_fit_image_post_process() must
be provided. Also, anything done during this post-processing step would
need to be comprehended in how the images were prepared before being
injected into the FIT creation (i.e. the blobs would have been pre-
processed before being added to the FIT image).
config SPL_FIT_SOURCE
string ".its source file for U-Boot FIT image"
depends on SPL_FIT
help
Specifies a (platform specific) FIT source file to generate the
U-Boot FIT image. This could specify further image to load and/or
execute.
config USE_SPL_FIT_GENERATOR
bool "Use a script to generate the .its script"
depends on SPL_FIT
default y if SPL_FIT && ARCH_ZYNQMP
config SPL_FIT_GENERATOR
string ".its file generator script for U-Boot FIT image"
depends on USE_SPL_FIT_GENERATOR
default "arch/arm/mach-zynqmp/mkimage_fit_atf.sh" if SPL_LOAD_FIT && ARCH_ZYNQMP
help
Specifies a (platform specific) script file to generate the FIT
source file used to build the U-Boot FIT image file. This gets
passed a list of supported device tree file stub names to
include in the generated image.
if VPL
config VPL_FIT
bool "Support Flattened Image Tree within VPL"
depends on VPL
default y
select VPL_HASH
select VPL_OF_LIBFDT
config VPL_FIT_PRINT
bool "Support FIT printing within VPL"
depends on VPL_FIT
default y
help
Support printing the content of the fitImage in a verbose manner in VPL.
config VPL_FIT_FULL_CHECK
bool "Do a full check of the FIT before using it"
default y
help
Enable this do a full check of the FIT to make sure it is valid. This
helps to protect against carefully crafted FITs which take advantage
of bugs or omissions in the code. This includes a bad structure,
multiple root nodes and the like.
config VPL_FIT_SIGNATURE
bool "Enable signature verification of FIT firmware within VPL"
depends on VPL_DM
default y
select FIT_SIGNATURE
select VPL_FIT
select VPL_CRYPTO
select VPL_HASH
imply VPL_RSA
imply VPL_RSA_VERIFY
select VPL_IMAGE_SIGN_INFO
select VPL_FIT_FULL_CHECK
config VPL_FIT_SIGNATURE_MAX_SIZE
hex "Max size of signed FIT structures in VPL"
depends on VPL_FIT_SIGNATURE
default 0x10000000
help
This option sets a max size in bytes for verified FIT uImages.
A sane value of 256MB protects corrupted DTB structures from overlapping
device memory. Assure this size does not extend past expected storage
space.
endif # VPL
config PXE_UTILS
bool
select MENU
help
Utilities for parsing PXE file formats.
config BOOT_DEFAULTS
bool # Common defaults for standard boot and distroboot
imply USE_BOOTCOMMAND
select CMD_ENV_EXISTS
select CMD_EXT2
select CMD_EXT4
select CMD_FAT
select CMD_FS_GENERIC
select CMD_PART if PARTITIONS
select CMD_DHCP if CMD_NET
select CMD_PING if CMD_NET
select CMD_PXE if CMD_NET
select SUPPORT_RAW_INITRD
select ENV_VARS_UBOOT_CONFIG
select CMD_BOOTI if ARM64
select CMD_BOOTZ if ARM && !ARM64
imply CMD_MII if NET
imply USB_STORAGE
imply EFI_PARTITION
imply ISO_PARTITION
help
These are not required but are commonly needed to support a good
selection of booting methods. Enable this to improve the capability
of U-Boot to boot various images. Currently much functionality is
tied to enabling the command that exercises it.
config BOOTSTD
bool "Standard boot support"
default y
depends on DM && OF_CONTROL && BLK
help
U-Boot supports a standard way of locating something to boot,
typically an Operating System such as Linux, provided by a distro such
as Arch Linux or Debian. Enable this to support iterating through
available bootdevs and using bootmeths to find bootflows suitable for
booting.
Standard boot is not a standard way of booting, just a framework
within U-Boot for supporting all the different ways that exist.
Terminology:
- bootdev - a device which can hold a distro (e.g. MMC)
- bootmeth - a method to scan a bootdev to find bootflows (owned by
U-Boot)
- bootflow - a description of how to boot (owned by the distro)
config SPL_BOOTSTD
bool "Standard boot support in SPL"
depends on SPL && SPL_DM && SPL_OF_CONTROL && SPL_BLK
default y if VPL
help
This enables standard boot in SPL. This is neeeded so that VBE
(Verified Boot for Embedded) can be used, since it depends on standard
boot. It is enabled by default since the main purpose of VPL is to
handle the firmware part of VBE.
config VPL_BOOTSTD
bool "Standard boot support in VPL"
depends on VPL && VPL_DM && VPL_OF_CONTROL && VPL_BLK
default y
help
This enables standard boot in SPL. This is neeeded so that VBE
(Verified Boot for Embedded) can be used, since it depends on standard
boot. It is enabled by default since the main purpose of VPL is to
handle the firmware part of VBE.
if BOOTSTD
config BOOTSTD_FULL
bool "Enhanced features for standard boot"
default y if SANDBOX
help
This enables various useful features for standard boot, which are not
essential for operation:
- bootdev, bootmeth commands
- extra features in the bootflow command
- support for selecting the ordering of bootmeths ("bootmeth order")
- support for selecting the ordering of bootdevs using the devicetree
as well as the "boot_targets" environment variable
config BOOTSTD_DEFAULTS
bool "Select some common defaults for standard boot"
depends on BOOTSTD
imply USE_BOOTCOMMAND
select BOOT_DEFAULTS
select BOOTMETH_DISTRO
help
These are not required but are commonly needed to support a good
selection of booting methods. Enable this to improve the capability
of U-Boot to boot various images.
config BOOTSTD_BOOTCOMMAND
bool "Use bootstd to boot"
default y if !DISTRO_DEFAULTS
help
Enable this to select a default boot-command suitable for booting
with standard boot. This can be overridden by the board if needed,
but the default command should be enough for most boards which use
standard boot.
For now this is only selected if distro boot is NOT used, since
standard boot does not support all of the features of distro boot
yet.
config BOOTMETH_GLOBAL
bool
help
Add support for global bootmeths. This feature is used by VBE and
EFI bootmgr, since they take full control over which bootdevs are
selected to boot.
config BOOTMETH_CROS
bool "Bootdev support for Chromium OS"
depends on X86 || SANDBOX
default y
help
Enables support for booting Chromium OS using bootdevs. This uses the
kernel A slot and obtains the kernel command line from the parameters
provided there.
Note that only x86 devices are supported at present.
config BOOTMETH_EXTLINUX
bool "Bootdev support for extlinux boot"
select PXE_UTILS
default y
help
Enables support for extlinux boot using bootdevs. This makes the
bootdevs look for a 'extlinux/extlinux.conf' on each filesystem
they scan.
The specification for this filed is here:
https://uapi-group.org/specifications/specs/boot_loader_specification/
This provides a way to try out standard boot on an existing boot flow.
config BOOTMETH_EXTLINUX_PXE
bool "Bootdev support for extlinux boot over network"
depends on CMD_PXE && CMD_NET && DM_ETH
default y
help
Enables support for extlinux boot using bootdevs. This makes the
bootdevs look for a 'extlinux/extlinux.conf' on the tftp server.
The specification for this file is here:
https://uapi-group.org/specifications/specs/boot_loader_specification/
This provides a way to try out standard boot on an existing boot flow.
config BOOTMETH_EFILOADER
bool "Bootdev support for EFI boot"
depends on EFI_LOADER
default y
help
Enables support for EFI boot using bootdevs. This makes the
bootdevs look for a 'boot<arch>.efi' on each filesystem
they scan. The resulting file is booted after enabling U-Boot's
EFI loader support.
The <arch> depends on the architecture of the board:
aa64 - aarch64 (ARM 64-bit)
arm - ARM 32-bit
ia32 - x86 32-bit
x64 - x86 64-bit
riscv32 - RISC-V 32-bit
riscv64 - RISC-V 64-bit
This provides a way to try out standard boot on an existing boot flow.
config BOOTMETH_VBE
bool "Bootdev support for Verified Boot for Embedded"
depends on FIT
default y
select BOOTMETH_GLOBAL
select EVENT
help
Enables support for VBE boot. This is a standard boot method which
supports selection of various firmware components, seleciton of an OS to
boot as well as updating these using fwupd.
config BOOTMETH_DISTRO
bool # Options needed to boot any distro
select BOOTMETH_SCRIPT # E.g. Armbian uses scripts
select BOOTMETH_EXTLINUX # E.g. Debian uses these
select BOOTMETH_EXTLINUX_PXE if CMD_PXE && CMD_NET && DM_ETH
select BOOTMETH_EFILOADER if EFI_LOADER # E.g. Ubuntu uses this
config SPL_BOOTMETH_VBE
bool "Bootdev support for Verified Boot for Embedded (SPL)"
depends on SPL && FIT
select EVENT
default y if VPL
help
Enables support for VBE boot. This is a standard boot method which
supports selection of various firmware components, seleciton of an OS to
boot as well as updating these using fwupd.
config VPL_BOOTMETH_VBE
bool "Bootdev support for Verified Boot for Embedded (VPL)"
depends on VPL && FIT
select EVENT
default y
help
Enables support for VBE boot. This is a standard boot method which
supports selection of various firmware components, seleciton of an OS to
boot as well as updating these using fwupd.
if BOOTMETH_VBE
config BOOTMETH_VBE_REQUEST
bool "Support for serving VBE OS requests"
default y
help
Enables support for looking that the requests made by the
Operating System being booted. These requests result in additions to
the device tree /chosen node, added during the device tree fixup
phase.
config SPL_BOOTMETH_VBE_REQUEST
bool "Support for serving VBE OS requests (SPL)"
depends on SPL
help
Enables support for looking that the requests made by the
Operating System being booted. These requests result in additions to
the device tree /chosen node, added during the device tree fixup
phase.
This is only useful if you are booting an OS direct from SPL.
config BOOTMETH_VBE_SIMPLE
bool "Bootdev support for VBE 'simple' method"
default y
help
Enables support for VBE 'simple' boot. This allows updating a single
firmware image in boot media such as MMC. It does not support any sort
of rollback, recovery or A/B boot.
config BOOTMETH_VBE_SIMPLE_OS
bool "Bootdev support for VBE 'simple' method OS phase"
default y
help
Enables support for the OS parts of VBE 'simple' boot. This includes
fixing up the device tree with the required VBE information, ready
for booting into the OS. This option is only enabled for U-Boot
proper, since it is the phase where device tree fixups happen.
config SPL_BOOTMETH_VBE_SIMPLE
bool "Bootdev support for VBE 'simple' method (SPL)"
depends on SPL
default y if VPL
help
Enables support for VBE 'simple' boot. This allows updating a single
firmware image in boot media such as MMC. It does not support any sort
of rollback, recovery or A/B boot.
config VPL_BOOTMETH_VBE_SIMPLE
bool "Bootdev support for VBE 'simple' method (VPL)"
depends on VPL
default y
help
Enables support for VBE 'simple' boot. This allows updating a single
firmware image in boot media such as MMC. It does not support any sort
of rollback, recovery or A/B boot.
config SPL_BOOTMETH_VBE_SIMPLE_FW
bool "Bootdev support for VBE 'simple' method firmware phase (SPL)"
depends on VPL
default y
help
Enables support for the firmware parts of VBE 'simple' boot. This
includes an SPL loader which locates the correct U-Boot to boot into.
This option should really only be enabled for VPL, since it is the
phase where the SPL + U-Boot decision should be made. But for now,
SPL does its own FIT-configuration selection.
config VPL_BOOTMETH_VBE_SIMPLE_FW
bool "Bootdev support for VBE 'simple' method firmware phase (VPL)"
depends on VPL
default y
help
Enables support for the firmware parts of VBE 'simple' boot. This
includes an SPL loader which locates the correct SPL to boot into.
This option enabled for VPL, since it is the phase where the SPL
decision is made.
endif # BOOTMETH_VBE
config EXPO
bool "Support for expos - groups of scenes displaying a UI"
depends on VIDEO
default y if BOOTMETH_VBE
help
An expo is a way of presenting and collecting information from the
user. It consists of a collection of 'scenes' of which only one is
presented at a time. An expo is typically used to show a boot menu
and allow settings to be changed.
The expo can be presented in graphics form using a vidconsole, or in
text form on a serial console.
config BOOTMETH_SANDBOX
def_bool y
depends on SANDBOX
help
This is a sandbox bootmeth driver used for testing. It always returns
-ENOTSUPP when attempting to boot.
config BOOTMETH_SCRIPT
bool "Bootdev support for U-Boot scripts"
default y if BOOTSTD_FULL
select HUSH_PARSER
help
Enables support for booting a distro via a U-Boot script. This makes
the bootdevs look for a 'boot/boot.scr' file which can be used to
boot the distro.
This provides a way to try out standard boot on an existing boot flow.
It is not enabled by default to save space.
endif
config LEGACY_IMAGE_FORMAT
bool "Enable support for the legacy image format"
default y if !FIT_SIGNATURE && !TI_SECURE_DEVICE
help
This option enables the legacy image format. It is enabled by
default for backward compatibility, unless FIT_SIGNATURE is
set where it is disabled so that unsigned images cannot be
loaded. If a board needs the legacy image format support in this
case, enable it here.
config SUPPORT_RAW_INITRD
bool "Enable raw initrd images"
help
Note, defining the SUPPORT_RAW_INITRD allows user to supply
kernel with raw initrd images. The syntax is slightly different, the
address of the initrd must be augmented by it's size, in the following
format: "<initrd address>:<initrd size>".
config OF_BOARD_SETUP
bool "Set up board-specific details in device tree before boot"
depends on OF_LIBFDT
help
This causes U-Boot to call ft_board_setup() before booting into
the Operating System. This function can set up various
board-specific information in the device tree for use by the OS.
The device tree is then passed to the OS.
config OF_SYSTEM_SETUP
bool "Set up system-specific details in device tree before boot"
depends on OF_LIBFDT
help
This causes U-Boot to call ft_system_setup() before booting into
the Operating System. This function can set up various
system-specific information in the device tree for use by the OS.
The device tree is then passed to the OS.
config OF_STDOUT_VIA_ALIAS
bool "Update the device-tree stdout alias from U-Boot"
depends on OF_LIBFDT
help
This uses U-Boot's serial alias from the aliases node to update
the device tree passed to the OS. The "linux,stdout-path" property
in the chosen node is set to point to the correct serial node.
This option currently references CONFIG_CONS_INDEX, which is
incorrect when used with device tree as this option does not
exist / should not be used.
config HAVE_TEXT_BASE
bool
depends on !NIOS2 && !XTENSA
depends on !EFI_APP
default y
config TEXT_BASE
depends on HAVE_TEXT_BASE
default 0x0 if POSITION_INDEPENDENT
default 0x80800000 if ARCH_OMAP2PLUS || ARCH_K3
default 0x81700000 if MACH_SUNIV
default 0x2a000000 if MACH_SUN9I
default 0x4a000000 if SUNXI_MINIMUM_DRAM_MB >= 256
default 0x42e00000 if SUNXI_MINIMUM_DRAM_MB >= 64
hex "Text Base"
help
The address in memory that U-Boot will be running from, initially.
config HAVE_SYS_MONITOR_BASE
bool
depends on ARC || MIPS || M68K || NIOS2 || PPC || XTENSA || X86 \
|| ENV_IS_IN_FLASH || MTD_NOR_FLASH
depends on !EFI_APP
default y
config SYS_MONITOR_BASE
depends on HAVE_SYS_MONITOR_BASE
hex "Physical start address of boot monitor code"
default TEXT_BASE
help
The physical start address of boot monitor code (which is the same as
CONFIG_TEXT_BASE when linking) and the same as CFG_SYS_FLASH_BASE
when booting from flash.
config SPL_SYS_MONITOR_BASE
depends on MPC85xx && SPL && HAVE_SYS_MONITOR_BASE
hex "Physical start address of SPL monitor code"
default SPL_TEXT_BASE
config TPL_SYS_MONITOR_BASE
depends on MPC85xx && TPL && HAVE_SYS_MONITOR_BASE
hex "Physical start address of TPL monitor code"
config DYNAMIC_SYS_CLK_FREQ
bool "Determine CPU clock frequency at run-time"
help
Implement a get_board_sys_clk function that will determine the CPU
clock frequency at run time, rather than define it statically.
config SYS_CLK_FREQ
depends on !DYNAMIC_SYS_CLK_FREQ
int "CPU clock frequency"
default 125000000 if ARCH_LS1012A
default 100000000 if ARCH_P2020 || ARCH_T1024 || ARCH_T1042 || \
ARCH_LS1021A || FSL_LSCH2 || FSL_LSCH3
default 66666666 if ARCH_P1010 || ARCH_P1020 || ARCH_T4240
default 66660000 if ARCH_T2080
default 33333333 if RCAR_GEN3
default 24000000 if ARCH_EXYNOS
default 20000000 if RCAR_GEN2
default 0
help
A static value for the CPU frequency. Note that if not required
for a given SoC, this can be left at 0.
config ARCH_FIXUP_FDT_MEMORY
bool "Enable arch_fixup_memory_banks() call"
default y
help
Enable FDT memory map syncup before OS boot. This feature can be
used for booting OS with different memory setup where the part of
the memory location should be used for different purpose.
config CHROMEOS
bool "Support booting Chrome OS"
help
Chrome OS requires U-Boot to set up a table indicating the boot mode
(e.g. Developer mode) and a few other things. Enable this if you are
booting on a Chromebook to avoid getting an error about an invalid
firmware ID.
config CHROMEOS_VBOOT
bool "Support Chrome OS verified boot"
help
This is intended to enable the full Chrome OS verified boot support
in U-Boot. It is not actually implemented in the U-Boot source code
at present, so this option is always set to 'n'. It allows
distinguishing between booting Chrome OS in a basic way (developer
mode) and a full boot.
config SYS_RAMBOOT
bool
config RAMBOOT_PBL
bool "Freescale PBL(pre-boot loader) image format support"
select SYS_RAMBOOT if PPC
help
Some SoCs use PBL to load RCW and/or pre-initialization instructions.
For more details refer to doc/README.pblimage
choice
prompt "Freescale PBL (or predecessor) load location"
depends on RAMBOOT_PBL || ((TARGET_P1010RDB_PA || TARGET_P1010RDB_PB \
|| TARGET_P1020RDB_PC || TARGET_P1020RDB_PD || TARGET_P2020RDB) \
&& !CMD_NAND)
config SDCARD
bool "Freescale PBL (or similar) is found on SD card"
config SPIFLASH
bool "Freescale PBL (or similar) is found on SPI flash"
config NO_PBL
bool "Freescale PBL (or similar) is not used in this case"
endchoice
config FSL_FIXED_MMC_LOCATION
bool "PBL MMC is at a fixed location"
depends on SDCARD && !RAMBOOT_PBL
config ESDHC_HC_BLK_ADDR
def_bool y
depends on FSL_FIXED_MMC_LOCATION && (ARCH_BSC9131 || ARCH_BSC9132 || ARCH_P1010)
help
In High Capacity SD Cards (> 2 GBytes), the 32-bit source address and
code length of these soc specify the memory address in block address
format. Block length is fixed to 512 bytes as per the SD High
Capacity specification.
config SYS_FSL_PBL_PBI
string "PBI(pre-boot instructions) commands for the PBL image"
depends on RAMBOOT_PBL
help
PBI commands can be used to configure SoC before it starts the execution.
Please refer doc/README.pblimage for more details.
config SYS_FSL_PBL_RCW
string "Aadditional RCW (Power on reset configuration) for the PBL image"
depends on RAMBOOT_PBL
help
Enables addition of RCW (Power on reset configuration) in built image.
Please refer doc/README.pblimage for more details.
config SYS_BOOT_RAMDISK_HIGH
depends on CMD_BOOTM || CMD_BOOTI || CMD_BOOTZ
depends on !(NIOS2 || SANDBOX || SH || XTENSA)
def_bool y
select LMB
help
Enable initrd_high functionality. If defined then the initrd_high
feature is enabled and the boot* ramdisk subcommand is enabled.
endmenu # Boot images
config DISTRO_DEFAULTS
bool "Select defaults suitable for booting general purpose Linux distributions"
select BOOT_DEFAULTS
select AUTO_COMPLETE
select CMDLINE_EDITING
select CMD_SYSBOOT
select HUSH_PARSER
select SYS_LONGHELP
help
Select this to enable various options and commands which are suitable
for building u-boot for booting general purpose Linux distributions.
menu "Boot timing"
config BOOTSTAGE
bool "Boot timing and reporting"
help
Enable recording of boot time while booting. To use it, insert
calls to bootstage_mark() with a suitable BOOTSTAGE_ID from
bootstage.h. Only a single entry is recorded for each ID. You can
give the entry a name with bootstage_mark_name(). You can also
record elapsed time in a particular stage using bootstage_start()
before starting and bootstage_accum() when finished. Bootstage will
add up all the accumulated time and report it.
Normally, IDs are defined in bootstage.h but a small number of
additional 'user' IDs can be used by passing BOOTSTAGE_ID_ALLOC
as the ID.
Calls to show_boot_progress() will also result in log entries but
these will not have names.
config SPL_BOOTSTAGE
bool "Boot timing and reported in SPL"
depends on BOOTSTAGE && SPL
help
Enable recording of boot time in SPL. To make this visible to U-Boot
proper, enable BOOTSTAGE_STASH as well. This will stash the timing
information when SPL finishes and load it when U-Boot proper starts
up.
config TPL_BOOTSTAGE
bool "Boot timing and reported in TPL"
depends on BOOTSTAGE && TPL
help
Enable recording of boot time in SPL. To make this visible to U-Boot
proper, enable BOOTSTAGE_STASH as well. This will stash the timing
information when TPL finishes and load it when U-Boot proper starts
up.
config BOOTSTAGE_REPORT
bool "Display a detailed boot timing report before booting the OS"
depends on BOOTSTAGE
help
Enable output of a boot time report just before the OS is booted.
This shows how long it took U-Boot to go through each stage of the
boot process. The report looks something like this:
Timer summary in microseconds:
Mark Elapsed Stage
0 0 reset
3,575,678 3,575,678 board_init_f start
3,575,695 17 arch_cpu_init A9
3,575,777 82 arch_cpu_init done
3,659,598 83,821 board_init_r start
3,910,375 250,777 main_loop
29,916,167 26,005,792 bootm_start
30,361,327 445,160 start_kernel
config BOOTSTAGE_RECORD_COUNT
int "Number of boot stage records to store"
depends on BOOTSTAGE
default 30
help
This is the size of the bootstage record list and is the maximum
number of bootstage records that can be recorded.
config SPL_BOOTSTAGE_RECORD_COUNT
int "Number of boot stage records to store for SPL"
depends on SPL_BOOTSTAGE
default 5
help
This is the size of the bootstage record list and is the maximum
number of bootstage records that can be recorded.
config TPL_BOOTSTAGE_RECORD_COUNT
int "Number of boot stage records to store for TPL"
depends on TPL_BOOTSTAGE
default 5
help
This is the size of the bootstage record list and is the maximum
number of bootstage records that can be recorded.
config BOOTSTAGE_FDT
bool "Store boot timing information in the OS device tree"
depends on BOOTSTAGE
help
Stash the bootstage information in the FDT. A root 'bootstage'
node is created with each bootstage id as a child. Each child
has a 'name' property and either 'mark' containing the
mark time in microseconds, or 'accum' containing the
accumulated time for that bootstage id in microseconds.
For example:
bootstage {
154 {
name = "board_init_f";
mark = <3575678>;
};
170 {
name = "lcd";
accum = <33482>;
};
};
Code in the Linux kernel can find this in /proc/devicetree.
config BOOTSTAGE_STASH
bool "Stash the boot timing information in memory before booting OS"
depends on BOOTSTAGE
help