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menu "SPL / TPL / VPL"
config SUPPORT_SPL
bool
config SUPPORT_TPL
bool
config SUPPORT_VPL
bool
config SPL_DFU_NO_RESET
bool
config SPL
bool
depends on SUPPORT_SPL
prompt "Enable SPL"
help
If you want to build SPL as well as the normal image, say Y.
config SPL_FRAMEWORK
bool "Support SPL based upon the common SPL framework"
depends on SPL
default y
help
Enable the SPL framework under common/spl/. This framework
supports MMC, NAND and YMODEM and other methods loading of U-Boot
and the Linux Kernel. If unsure, say Y.
config SPL_FRAMEWORK_BOARD_INIT_F
bool "Define a generic function board_init_f"
depends on SPL_FRAMEWORK
help
Define a generic function board_init_f that:
- initialize the spl (spl_early_init)
- initialize the serial (preloader_console_init)
Unless you want to provide your own board_init_f, you should say Y.
config SPL_SIZE_LIMIT
hex "Maximum size of SPL image"
depends on SPL
default 0x11000 if ARCH_MX6 && !MX6_OCRAM_256KB
default 0x31000 if ARCH_MX6 && MX6_OCRAM_256KB
default 0x0
help
Specifies the maximum length of the U-Boot SPL image.
If this value is zero, it is ignored.
config SPL_SIZE_LIMIT_SUBTRACT_GD
bool "SPL image size check: provide space for global data"
depends on SPL_SIZE_LIMIT > 0
help
If enabled, aligned size of global data is reserved in
SPL_SIZE_LIMIT check to ensure such an image does not overflow SRAM
if SPL_SIZE_LIMIT describes the size of SRAM available for SPL when
pre-reloc global data is put into this SRAM, too.
config SPL_SIZE_LIMIT_SUBTRACT_MALLOC
bool "SPL image size check: provide space for malloc() pool before relocation"
depends on SPL_SIZE_LIMIT > 0
help
If enabled, SPL_SYS_MALLOC_F_LEN is reserved in SPL_SIZE_LIMIT check
to ensure such an image does not overflow SRAM if SPL_SIZE_LIMIT
describes the size of SRAM available for SPL when pre-reloc malloc
pool is put into this SRAM, too.
config SPL_SIZE_LIMIT_PROVIDE_STACK
hex "SPL image size check: provide stack space before relocation"
depends on SPL_SIZE_LIMIT > 0
default 0
help
If set, this size is reserved in SPL_SIZE_LIMIT check to ensure such
an image does not overflow SRAM if SPL_SIZE_LIMIT describes the size
of SRAM available for SPL when the stack required before reolcation
uses this SRAM, too.
config SPL_SYS_STACK_F_CHECK_BYTE
hex
default 0xaa
help
Constant used to check the stack
config SPL_SYS_REPORT_STACK_F_USAGE
depends on SPL_SIZE_LIMIT_PROVIDE_STACK != 0
bool "Check and report stack usage in SPL before relocation"
help
If this option is enabled, the initial SPL stack is filled with 0xaa
very early, up to the size configured with
SPL_SIZE_LIMIT_PROVIDE_STACK.
Later when SPL is done using this initial stack and switches to a
stack in DRAM, the actually used size of this initial stack is
reported by examining the memory and searching for the lowest
occurrence of non 0xaa bytes.
This default implementation works for stacks growing down only.
config SPL_SHOW_ERRORS
bool "Show more information when something goes wrong"
help
This enabled more verbose error messages and checking when something
goes wrong in SPL. For example, it shows the error code when U-Boot
cannot be located. This can help to diagnose the problem and figure
out a fix, particularly during development.
This adds a small amount to SPL code size, perhaps 100 bytes.
config SPL_BINMAN_SYMBOLS
bool "Declare binman symbols in SPL"
depends on SPL_FRAMEWORK && BINMAN
default y
help
This enables use of symbols in SPL which refer to U-Boot, enabling SPL
to obtain the location of U-Boot simply by calling spl_get_image_pos()
and spl_get_image_size().
For this to work, you must have a U-Boot image in the binman image, so
binman can update SPL with the location of it.
menu "PowerPC and LayerScape SPL Boot options"
config SPL_NAND_BOOT
bool "Load SPL from NAND flash"
depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
config SPL_MMC_BOOT
bool "Load SPL from SD Card / eMMC"
depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
config SPL_SPI_BOOT
bool "Load SPL from SPI flash"
depends on PPC && (SUPPORT_SPL && !SPL_FRAMEWORK)
config SPL_FSL_PBL
bool "Create SPL in Freescale PBI format"
depends on (PPC || ARCH_LS1021A || ARCH_LS1043A || ARCH_LS1046A) && \
SUPPORT_SPL
help
Create boot binary having SPL binary in PBI format concatenated with
u-boot binary.
endmenu
config HANDOFF
bool "Pass hand-off information from SPL to U-Boot proper"
depends on SPL && BLOBLIST
help
It is useful to be able to pass information from SPL to U-Boot
proper to preserve state that is known in SPL and is needed in U-Boot.
Enable this to locate the handoff information in U-Boot proper, early
in boot. It is available in gd->handoff. The state state is set up
in SPL (or TPL if that is being used).
if SPL
config SPL_HANDOFF
bool "Pass hand-off information from SPL to U-Boot proper"
depends on HANDOFF && SPL_BLOBLIST
default y
help
This option enables SPL to write handoff information. This can be
used to pass information like the size of SDRAM from SPL to U-Boot
proper. Also SPL can receive information from TPL in the same place
if that is enabled.
config SPL_LDSCRIPT
string "Linker script for the SPL stage"
default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
help
The SPL stage will usually require a different linker-script
(as it runs from a different memory region) than the regular
U-Boot stage. Set this to the path of the linker-script to
be used for SPL.
config SPL_TEXT_BASE
hex "SPL Text Base"
default ISW_ENTRY_ADDR if AM43XX || AM33XX || OMAP54XX || ARCH_KEYSTONE
default 0x10060 if MACH_SUN50I || MACH_SUN50I_H5 || MACH_SUN9I
default 0x20060 if SUN50I_GEN_H6
default 0x00060 if ARCH_SUNXI
default 0xfffc0000 if ARCH_ZYNQMP
default 0x0
help
The address in memory that SPL will be running from.
config SPL_BOARD_INIT
bool "Call board-specific initialization in SPL"
help
If this option is enabled, U-Boot will call the function
spl_board_init() from board_init_r(). This function should be
provided by the board.
config SPL_BOOTROM_SUPPORT
bool "Support returning to the BOOTROM"
help
Some platforms (e.g. the Rockchip RK3368) provide support in their
ROM for loading the next boot-stage after performing basic setup
from the SPL stage.
Enable this option, to return to the BOOTROM through the
BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
boot device list, if not implemented for a given board)
config SPL_BOOTCOUNT_LIMIT
bool "Support bootcount in SPL"
depends on SPL_ENV_SUPPORT && !TPL_BOOTCOUNT_LIMIT
help
On some boards, which use 'falcon' mode, it is necessary to check
and increment the number of boot attempts. Such boards do not
use proper U-Boot for normal boot flow and hence needs those
adjustments to be done in the SPL.
config SPL_RAW_IMAGE_SUPPORT
bool "Support SPL loading and booting of RAW images"
default n if (ARCH_MX6 && (SPL_MMC || SPL_SATA))
default y if !TI_SECURE_DEVICE
help
SPL will support loading and booting a RAW image when this option
is y. If this is not set, SPL will move on to other available
boot media to find a suitable image.
config SPL_LEGACY_IMAGE_SUPPORT
bool "Support SPL loading and booting of Legacy images"
default y if !TI_SECURE_DEVICE && !SPL_LOAD_FIT
help
SPL will support loading and booting Legacy images when this option
is y. If this is not set, SPL will move on to other available
boot media to find a suitable image.
config SPL_LEGACY_IMAGE_CRC_CHECK
bool "Check CRC of Legacy images"
depends on SPL_LEGACY_IMAGE_SUPPORT
select SPL_CRC32
help
Enable this to check the CRC of Legacy images. While this increases
reliability, it affects both code size and boot duration.
If disabled, Legacy images are booted if the image magic and size
are correct, without further integrity checks.
config SPL_SYS_MALLOC_SIMPLE
bool
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 TPL_SYS_MALLOC_SIMPLE
bool
prompt "Only use malloc_simple functions in the TPL"
depends on TPL
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 TPL 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
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"
default 0x82000000 if ARCH_OMAP2PLUS
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.
config SPL_SEPARATE_BSS
bool "BSS section is in a different memory region from text"
help
Some platforms need a large BSS region in SPL and can provide this
because RAM is already set up. In this case BSS can be moved to RAM.
This option should then be enabled so that the correct device tree
location is used. Normally we put the device tree at the end of BSS
but with this option enabled, it goes at _image_binary_end.
config SPL_READ_ONLY
bool
depends on SPL_OF_PLATDATA
# Bind cannot be supported because the udevice structs are in read-only
# memory so we cannot update the linked lists.
select SPL_OF_PLATDATA_NO_BIND
select SPL_OF_PLATDATA_RT
help
Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
section of memory. This means that of-platdata must make a copy (in
writeable memory) of anything it wants to modify, such as
device-private data.
config TPL_SEPARATE_BSS
bool "BSS section is in a different memory region from text"
default y if SPL_SEPARATE_BSS
help
Some platforms need a large BSS region in TPL and can provide this
because RAM is already set up. In this case BSS can be moved to RAM.
This option should then be enabled so that the correct device tree
location is used. Normally we put the device tree at the end of BSS
but with this option enabled, it goes at _image_binary_end.
config SPL_BANNER_PRINT
bool "Enable output of the SPL banner 'U-Boot SPL ...'"
default y
help
If this option is enabled, SPL will print the banner with version
info. Disabling this option could be useful to reduce SPL boot time
(e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
config TPL_BANNER_PRINT
bool "Enable output of the TPL banner 'U-Boot TPL ...'"
depends on TPL
default y
help
If this option is enabled, TPL will print the banner with version
info. Disabling this option could be useful to reduce TPL boot time
(e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud).
config SPL_EARLY_BSS
depends on ARM && !ARM64
bool "Allows initializing BSS early before entering board_init_f"
help
On some platform we have sufficient memory available early on to
allow setting up and using a basic BSS prior to entering
board_init_f. Activating this option will also de-activate the
clearing of BSS during the SPL relocation process, thus allowing
to carry state from board_init_f to board_init_r by way of BSS.
config SPL_DISPLAY_PRINT
bool "Display a board-specific message in SPL"
help
If this option is enabled, U-Boot will call the function
spl_display_print() immediately after displaying the SPL console
banner ("U-Boot SPL ..."). This function should be provided by
the board.
config SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
bool "MMC raw mode: by sector"
default y if ARCH_SUNXI || ARCH_DAVINCI || ARCH_UNIPHIER || \
ARCH_MX6 || ARCH_MX7 || \
ARCH_ROCKCHIP || ARCH_MVEBU || ARCH_SOCFPGA || \
ARCH_AT91 || ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || \
OMAP44XX || OMAP54XX || AM33XX || AM43XX || \
TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
help
Use sector number for specifying U-Boot location on MMC/SD in
raw mode.
config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
hex "Address on the MMC to load U-Boot from"
depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
default 0x40 if ARCH_SUNXI
default 0x75 if ARCH_DAVINCI
default 0x8a if ARCH_MX6 || ARCH_MX7
default 0x100 if ARCH_UNIPHIER
default 0x0 if ARCH_MVEBU
default 0x200 if ARCH_SOCFPGA || ARCH_AT91
default 0x300 if ARCH_ZYNQ || ARCH_KEYSTONE || OMAP34XX || OMAP44XX || \
OMAP54XX || AM33XX || AM43XX || ARCH_K3
default 0x4000 if ARCH_ROCKCHIP
default 0x822 if TARGET_SIFIVE_UNLEASHED || TARGET_SIFIVE_UNMATCHED
help
Address on the MMC to load U-Boot from, when the MMC is being used
in raw mode. Units: MMC sectors (1 sector = 512 bytes).
config SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET
hex "U-Boot main hardware partition image offset"
depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
default 0x10 if ARCH_SUNXI
default 0x0
help
On some platforms SPL location depends on hardware partition. The ROM
code skips the MBR sector when loading SPL from main hardware data
partition. This adds offset to the main U-Boot image. Set this symbol
to the number of skipped sectors.
If unsure, leave the default.
config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
bool "MMC Raw mode: by partition"
help
Use a partition for loading U-Boot when using MMC/SD in raw mode.
config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
hex "Partition to use to load U-Boot from"
depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
default 1
help
Partition on the MMC to load U-Boot from when the MMC is being
used in raw mode
config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
bool "MMC raw mode: by partition type"
depends on DOS_PARTITION && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
help
Use partition type for specifying U-Boot partition on MMC/SD in
raw mode. U-Boot will be loaded from the first partition of this
type to be found.
config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
hex "Partition Type on the MMC to load U-Boot from"
depends on SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
help
Partition Type on the MMC to load U-Boot from, when the MMC is being
used in raw mode.
config SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
bool "Override eMMC EXT_CSC_PART_CONFIG by user defined partition"
depends on SUPPORT_EMMC_BOOT
help
eMMC boot partition is normally configured by the bits of the EXT_CSD
register (EXT_CSC_PART_CONFIG), BOOT_PARTITION_ENABLE field. In some
cases it might be required in SPL to load the image from different
partition than the partition selected by EXT_CSC_PART_CONFIG register.
Enable this option if you intend to use an eMMC boot partition other
then selected via EXT_CSC_PART_CONFIG register and specify the custom
partition number by the CONFIG_SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
option.
config SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
int "Number of the eMMC boot partition to use"
depends on SUPPORT_EMMC_BOOT_OVERRIDE_PART_CONFIG
default 1
help
eMMC boot partition number to use when the eMMC in raw mode and
the eMMC EXT_CSC_PART_CONFIG selection should be overridden in SPL
by user defined partition number.
config SPL_CRC32
bool "Support CRC32"
default y if SPL_LEGACY_IMAGE_SUPPORT || SPL_EFI_PARTITION
default y if SPL_ENV_SUPPORT || TPL_BLOBLIST
help
Enable this to support CRC32 in uImages or FIT images within SPL.
This is a 32-bit checksum value that can be used to verify images.
For FIT images, this is the least secure type of checksum, suitable
for detected accidental image corruption. For secure applications you
should consider SHA1 or SHA256.
config SPL_MD5
bool "Support MD5"
depends on SPL_FIT
help
Enable this to support MD5 in FIT images within SPL. An MD5
checksum is a 128-bit hash value used to check that the image
contents have not been corrupted. Note that MD5 is not considered
secure as it is possible (with a brute-force attack) to adjust the
image while still retaining the same MD5 hash value. For secure
applications where images may be changed maliciously, you should
consider SHA256 or SHA384.
config SPL_FIT_IMAGE_TINY
bool "Remove functionality from SPL FIT loading to reduce size"
depends on SPL_FIT
default y if MACH_SUN50I || MACH_SUN50I_H5 || SUN50I_GEN_H6
default y if ARCH_IMX8M
help
Enable this to reduce the size of the FIT image loading code
in SPL, if space for the SPL binary is very tight.
This skips the recording of each loaded payload
(i.e. loadable) into the FDT (modifying the loaded FDT to
ensure this information is available to the next image
invoked).
config SPL_CACHE
bool "Support CACHE drivers"
help
Enable CACHE drivers in SPL. These drivers can keep data so that
future requests for that data can be served faster. Enable this option
to build the drivers in drivers/cache as part of an SPL build.
config SPL_CPU
bool "Support CPU drivers"
help
Enable this to support CPU drivers in SPL. These drivers can set
up CPUs and provide information about them such as the model and
name. This can be useful in SPL since setting up the CPUs earlier
may improve boot performance. Enable this option to build the
drivers in drivers/cpu as part of an SPL build.
config SPL_CRYPTO
bool "Support crypto drivers"
help
Enable crypto drivers in SPL. These drivers can be used to
accelerate secure boot processing in secure applications. Enable
this option to build the drivers in drivers/crypto as part of an
SPL build.
config SPL_DMA
bool "Support DMA drivers"
help
Enable DMA (direct-memory-access) drivers in SPL. These drivers
can be used to handle memory-to-peripheral data transfer without
the CPU moving the data. Enable this option to build the drivers
in drivers/dma as part of an SPL build.
config SPL_DRIVERS_MISC
bool "Support misc drivers"
help
Enable miscellaneous drivers in SPL. These drivers perform various
tasks that don't fall nicely into other categories, Enable this
option to build the drivers in drivers/misc as part of an SPL
build, for those that support building in SPL (not all drivers do).
config SPL_ENV_SUPPORT
bool "Support an environment"
help
Enable environment support in SPL. The U-Boot environment provides
a number of settings (essentially name/value pairs) which can
control many aspects of U-Boot's operation. Normally this is not
needed in SPL as it has a much simpler task with less
configuration. But some boards use this to support 'Falcon' boot
on EXT2 and FAT, where SPL boots directly into Linux without
starting U-Boot first. Enabling this option will make env_get()
and env_set() available in SPL.
config SPL_SAVEENV
bool "Support save environment"
depends on SPL_ENV_SUPPORT
select SPL_MMC_WRITE if ENV_IS_IN_MMC
help
Enable save environment support in SPL after setenv. By default
the saveenv option is not provided in SPL, but some boards need
this support in 'Falcon' boot, where SPL need to boot from
different images based on environment variable set by OS. For
example OS may set "reboot_image" environment variable to
"recovery" inorder to boot recovery image by SPL. The SPL read
"reboot_image" and act accordingly and change the reboot_image
to default mode using setenv and save the environment.
config SPL_ETH
bool "Support Ethernet"
depends on SPL_ENV_SUPPORT
depends on SPL_NET
help
Enable access to the network subsystem and associated Ethernet
drivers in SPL. This permits SPL to load U-Boot over an Ethernet
link rather than from an on-board peripheral. Environment support
is required since the network stack uses a number of environment
variables. See also SPL_NET.
config SPL_FS_EXT4
bool "Support EXT filesystems"
help
Enable support for EXT2/3/4 filesystems with SPL. This permits
U-Boot (or Linux in Falcon mode) to be loaded from an EXT
filesystem from within SPL. Support for the underlying block
device (e.g. MMC or USB) must be enabled separately.
config SPL_FS_SQUASHFS
bool "Support SquashFS filesystems"
select FS_SQUASHFS
help
Enable support for SquashFS filesystems with SPL. This permits
U-Boot (or Linux in Falcon mode) to be loaded from a SquashFS
filesystem from within SPL. Support for the underlying block
device (e.g. MMC or USB) must be enabled separately.
config SPL_FS_FAT
bool "Support FAT filesystems"
select FS_FAT
help
Enable support for FAT and VFAT filesystems with SPL. This
permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
filesystem from within SPL. Support for the underlying block
device (e.g. MMC or USB) must be enabled separately.
config SPL_FAT_WRITE
bool "Support write for FAT filesystems"
help
Enable write support for FAT and VFAT filesystems with SPL.
Support for the underlying block device (e.g. MMC or USB) must be
enabled separately.
config SPL_FPGA
bool "Support FPGAs"
help
Enable support for FPGAs in SPL. Field-programmable Gate Arrays
provide software-configurable hardware which is typically used to
implement peripherals (such as UARTs, LCD displays, MMC) or
accelerate custom processing functions, such as image processing
or machine learning. Sometimes it is useful to program the FPGA
as early as possible during boot, and this option can enable that
within SPL.
config SPL_GPIO
bool "Support GPIO in SPL"
help
Enable support for GPIOs (General-purpose Input/Output) in SPL.
GPIOs allow U-Boot to read the state of an input line (high or
low) and set the state of an output line. This can be used to
drive LEDs, control power to various system parts and read user
input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
for example. Enable this option to build the drivers in
drivers/gpio as part of an SPL build.
config SPL_I2C
bool "Support I2C"
help
Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
I2C works with a clock and data line which can be driven by a
one or more masters or slaves. It is a fairly complex bus but is
widely used as it only needs two lines for communication. Speeds of
400kbps are typical but up to 3.4Mbps is supported by some
hardware. I2C can be useful in SPL to configure power management
ICs (PMICs) before raising the CPU clock speed, for example.
Enable this option to build the drivers in drivers/i2c as part of
an SPL build.
config SPL_LIBCOMMON_SUPPORT
bool "Support common libraries"
help
Enable support for common U-Boot libraries within SPL. These
libraries include common code to deal with U-Boot images,
environment and USB, for example. This option is enabled on many
boards. Enable this option to build the code in common/ as part of
an SPL build.
config SPL_LIBDISK_SUPPORT
bool "Support disk partitions"
select PARTITIONS
help
Enable support for disk partitions within SPL. 'Disk' is something
of a misnomer as it includes non-spinning media such as flash (as
used in MMC and USB sticks). Partitions provide a way for a disk
to be split up into separate regions, with a partition table placed
at the start or end which describes the location and size of each
'partition'. These partitions are typically uses as individual block
devices, typically with an EXT2 or FAT filesystem in each. This
option enables whatever partition support has been enabled in
U-Boot to also be used in SPL. It brings in the code in disk/.
config SPL_LIBGENERIC_SUPPORT
bool "Support generic libraries"
help
Enable support for generic U-Boot libraries within SPL. These
libraries include generic code to deal with device tree, hashing,
printf(), compression and the like. This option is enabled on many
boards. Enable this option to build the code in lib/ as part of an
SPL build.
config SPL_DM_MAILBOX
bool "Support Mailbox"
help
Enable support for Mailbox within SPL. This enable the inter
processor communication protocols tobe used within SPL. Enable
this option to build the drivers in drivers/mailbox as part of
SPL build.
config SPL_MMC
bool "Support MMC"
depends on MMC
select HAVE_BLOCK_DEVICE
help
Enable support for MMC (Multimedia Card) within SPL. This enables
the MMC protocol implementation and allows any enabled drivers to
be used within SPL. MMC can be used with or without disk partition
support depending on the application (SPL_LIBDISK_SUPPORT). Enable
this option to build the drivers in drivers/mmc as part of an SPL
build.
config SYS_MMCSD_FS_BOOT_PARTITION
int "MMC Boot Partition"
default 1
help
Partition on the MMC to load U-Boot from when the MMC is being
used in fs mode.
Use -1 as a special value to use the first bootable partition.
config SPL_MMC_TINY
bool "Tiny MMC framework in SPL"
depends on SPL_MMC
help
Enable MMC framework tinification support. This option is useful if
if your SPL is extremely size constrained. Heed the warning, enable
this option if and only if you know exactly what you are doing, if
you are reading this help text, you most likely have no idea :-)
The MMC framework is reduced to bare minimum to be useful. No malloc
support is needed for the MMC framework operation with this option
enabled. The framework supports exactly one MMC device and exactly
one MMC driver. The MMC driver can be adjusted to avoid any malloc
operations too, which can remove the need for malloc support in SPL
and thus further reduce footprint.
config SPL_MMC_WRITE
bool "MMC/SD/SDIO card support for write operations in SPL"
depends on SPL_MMC
help
Enable write access to MMC and SD Cards in SPL
config SPL_MPC8XXX_INIT_DDR
bool "Support MPC8XXX DDR init"
help
Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
random-access memory) on the MPC8XXX family within SPL. This
allows DRAM to be set up before loading U-Boot into that DRAM,
where it can run.
config SPL_MTD_SUPPORT
bool "Support MTD drivers"
help
Enable support for MTD (Memory Technology Device) within SPL. MTD
provides a block interface over raw NAND and can also be used with
SPI flash. This allows SPL to load U-Boot from supported MTD
devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
to enable specific MTD drivers.
config SPL_MUSB_NEW
bool "Support new Mentor Graphics USB"
help
Enable support for Mentor Graphics USB in SPL. This is a new
driver used by some boards. Enable this option to build
the drivers in drivers/usb/musb-new as part of an SPL build. The
old drivers are in drivers/usb/musb.
config SPL_NAND_SUPPORT
bool "Support NAND flash"
help
Enable support for NAND (Negative AND) flash in SPL. NAND flash
can be used to allow SPL to load U-Boot from supported devices.
This enables the drivers in drivers/mtd/nand/raw as part of an SPL
build.
config SPL_NAND_DRIVERS
bool "Use standard NAND driver"
help
SPL uses normal NAND drivers, not minimal drivers.
config SPL_NAND_ECC
bool "Include standard software ECC in the SPL"
config SPL_NAND_SIMPLE
bool "Support simple NAND drivers in SPL"
help
Support for NAND boot using simple NAND drivers that
expose the cmd_ctrl() interface.
config SPL_NAND_BASE
depends on SPL_NAND_DRIVERS
bool "Use Base NAND Driver"
help
Include nand_base.c in the SPL.
config SPL_NAND_IDENT
depends on SPL_NAND_BASE
bool "Use chip ID to identify NAND flash"
help
SPL uses the chip ID list to identify the NAND flash.
config SPL_UBI
bool "Support UBI"
help
Enable support for loading payloads from UBI. See
README.ubispl for more info.
if SPL_DM
config SPL_DM_SPI
bool "Support SPI DM drivers in SPL"
help
Enable support for SPI DM drivers in SPL.
config SPL_DM_SPI_FLASH
bool "Support SPI DM FLASH drivers in SPL"
help
Enable support for SPI DM flash drivers in SPL.
endif
if SPL_UBI
config SPL_UBI_LOAD_BY_VOLNAME
bool "Support loading volumes by name"
help
This enables support for loading UBI volumes by name. When this
is set, CONFIG_SPL_UBI_LOAD_MONITOR_VOLNAME can be used to
configure the volume name from which to load U-Boot.
config SPL_UBI_MAX_VOL_LEBS
int "Maximum number of LEBs per volume"
depends on SPL_UBI
help
The maximum number of logical eraseblocks which a static volume
to load can contain. Used for sizing the scan data structure.
config SPL_UBI_MAX_PEB_SIZE
int "Maximum PEB size"
depends on SPL_UBI
help
The maximum physical erase block size.
config SPL_UBI_MAX_PEBS
int "Maximum number of PEBs"
depends on SPL_UBI
help
The maximum physical erase block size. If not overridden by
board code, this value will be used as the actual number of PEBs.
config SPL_UBI_PEB_OFFSET
int "Offset to first UBI PEB"
depends on SPL_UBI
help
The offset in number of PEBs from the start of flash to the first
PEB part of the UBI image.
config SPL_UBI_VID_OFFSET
int "Offset to VID header"
depends on SPL_UBI
config SPL_UBI_LEB_START
int "Offset to LEB in PEB"
depends on SPL_UBI
help
The offset in bytes to the LEB within a PEB.
config SPL_UBI_INFO_ADDR
hex "Address to place UBI scan info"
depends on SPL_UBI
help
Address for ubispl to place the scan info. Read README.ubispl to
determine the required size
config SPL_UBI_VOL_IDS
int "Maximum volume id"
depends on SPL_UBI
help
The maximum volume id which can be loaded. Used for sizing the
scan data structure.
config SPL_UBI_LOAD_MONITOR_ID
int "id of U-Boot volume"
depends on SPL_UBI
help
The UBI volume id from which to load U-Boot
config SPL_UBI_LOAD_MONITOR_VOLNAME
string "volume name of U-Boot volume"
depends on SPL_UBI_LOAD_BY_VOLNAME
help
The UBI volume name from which to load U-Boot
config SPL_UBI_LOAD_KERNEL_ID
int "id of kernel volume"
depends on SPL_OS_BOOT && SPL_UBI
help
The UBI volume id from which to load the kernel
config SPL_UBI_LOAD_ARGS_ID
int "id of kernel args volume"
depends on SPL_OS_BOOT && SPL_UBI
help
The UBI volume id from which to load the device tree
config UBI_SPL_SILENCE_MSG
bool "silence UBI SPL messages"
help
Disable messages from UBI SPL. This leaves warnings
and errors enabled.
endif # if SPL_UBI
config SPL_NET
bool "Support networking"
help
Enable support for network devices (such as Ethernet) in SPL.
This permits SPL to load U-Boot over a network link rather than
from an on-board peripheral. Environment support is required since
the network stack uses a number of environment variables. See also
SPL_ETH.
if SPL_NET
config SPL_NET_VCI_STRING
string "BOOTP Vendor Class Identifier string sent by SPL"
help
As defined by RFC 2132 the vendor class identifier field can be
sent by the client to identify the vendor type and configuration
of a client. This is often used in practice to allow for the DHCP
server to specify different files to load depending on if the ROM,
SPL or U-Boot itself makes the request
endif # if SPL_NET
config SPL_NO_CPU_SUPPORT
bool "Drop CPU code in SPL"
help
This is specific to the ARM926EJ-S CPU. It disables the standard
start.S start-up code, presumably so that a replacement can be
used on that CPU. You should not enable it unless you know what
you are doing.
config SPL_NOR_SUPPORT
bool "Support NOR flash"
help
Enable support for loading U-Boot from memory-mapped NOR (Negative
OR) flash in SPL. NOR flash is slow to write but fast to read, and
a memory-mapped device makes it very easy to access. Loading from
NOR is typically achieved with just a memcpy().
config SPL_XIP_SUPPORT
bool "Support XIP"
depends on SPL
help
Enable support for execute in place of U-Boot or kernel image. There
is no need to copy image from flash to ram if flash supports execute
in place. Its very useful in systems having enough flash but not
enough ram to load the image.
config SPL_ONENAND_SUPPORT
bool "Support OneNAND flash"
help
Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
a type of NAND flash and therefore can be used to allow SPL to
load U-Boot from supported devices. This enables the drivers in
drivers/mtd/onenand as part of an SPL build.
config SPL_OS_BOOT
bool "Activate Falcon Mode"
depends on !TI_SECURE_DEVICE
help
Enable booting directly to an OS from SPL.
for more info read doc/README.falcon
if SPL_OS_BOOT
config SYS_OS_BASE
hex "addr, where OS is found"
depends on SPL_NOR_SUPPORT
help
Specify the address, where the OS image is found, which
gets booted.
endif # SPL_OS_BOOT
config SPL_FALCON_BOOT_MMCSD
bool "Enable Falcon boot from MMC or SD media"
depends on SPL_OS_BOOT && SPL_MMC
help
Select this if the Falcon mode OS image mode is on MMC or SD media.
config SYS_MMCSD_RAW_MODE_KERNEL_SECTOR
hex "Falcon mode: Sector to load kernel uImage from MMC"
depends on SPL_FALCON_BOOT_MMCSD
help
When Falcon mode is used with an MMC or SD media, SPL needs to know
where to look for the kernel uImage. The image is expected to begin
at the raw MMC specified in this config.
Note that the Falcon mode image can also be a FIT, if FIT support is
enabled.
config SPL_PAYLOAD
string "SPL payload"
default "tpl/u-boot-with-tpl.bin" if TPL
default "u-boot.bin"
help
Payload for SPL boot. For backward compatibility, default to
u-boot.bin, i.e. RAW image without any header. In case of
TPL, tpl/u-boot-with-tpl.bin. For new boards, suggest to
use u-boot.img.
config SPL_PCI
bool "Support PCI drivers"
help
Enable support for PCI in SPL. For platforms that need PCI to boot,
or must perform some init using PCI in SPL, this provides the
necessary driver support. This enables the drivers in drivers/pci
as part of an SPL build.
config SPL_PCH
bool "Support PCH drivers"
help
Enable support for PCH (Platform Controller Hub) devices in SPL.
These are used to set up GPIOs and the SPI peripheral early in
boot. This enables the drivers in drivers/pch as part of an SPL
build.
config SPL_POST_MEM_SUPPORT
bool "Support POST drivers"
help
Enable support for POST (Power-on Self Test) in SPL. POST is a
procedure that checks that the hardware (CPU or board) appears to
be functionally correctly. It is a sanity check that can be
performed before booting. This enables the drivers in post/drivers
as part of an SPL build.
config SPL_DM_RESET
bool "Support reset drivers"
depends on SPL
help
Enable support for reset control in SPL.
That can be useful in SPL to handle IP reset in driver, as in U-Boot,
by using the generic reset API provided by driver model.
This enables the drivers in drivers/reset as part of an SPL build.
config SPL_POWER
bool "Support power drivers"
help
Enable support for power control in SPL. This includes support
for PMICs (Power-management Integrated Circuits) and some of the
features provided by PMICs. In particular, voltage regulators can
be used to enable/disable power and vary its voltage. That can be
useful in SPL to turn on boot peripherals and adjust CPU voltage
so that the clock speed can be increased. This enables the drivers
in drivers/power, drivers/power/pmic and drivers/power/regulator
as part of an SPL build.
config SPL_POWER_DOMAIN
bool "Support power domain drivers"
select SPL_POWER
help
Enable support for power domain control in SPL. Many SoCs allow
power to be applied to or removed from portions of the SoC (power
domains). This may be used to save power. This API provides the
means to control such power management hardware. This enables
the drivers in drivers/power/domain as part of a SPL build.
config SPL_RAM_SUPPORT
bool "Support booting from RAM"
default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
help
Enable booting of an image in RAM. The image can be preloaded or
it can be loaded by SPL directly into RAM (e.g. using USB).
config SPL_RAM_DEVICE
bool "Support booting from preloaded image in RAM"
depends on SPL_RAM_SUPPORT
default y if MICROBLAZE || ARCH_SOCFPGA || ARCH_TEGRA || ARCH_ZYNQ
help
Enable booting of an image already loaded in RAM. The image has to
be already in memory when SPL takes over, e.g. loaded by the boot
ROM.
config SPL_REMOTEPROC
bool "Support REMOTEPROCS"
help
Enable support for REMOTEPROCs in SPL. This permits to load
a remote processor firmware in SPL.
config SPL_RTC
bool "Support RTC drivers"
help
Enable RTC (Real-time Clock) support in SPL. This includes support
for reading and setting the time. Some RTC devices also have some
non-volatile (battery-backed) memory which is accessible if
needed. This enables the drivers in drivers/rtc as part of an SPL
build.
config SPL_SATA
bool "Support loading from SATA"
help
Enable support for SATA (Serial AT attachment) in SPL. This allows
use of SATA devices such as hard drives and flash drivers for
loading U-Boot. SATA is used in higher-end embedded systems and
can provide higher performance than MMC , at somewhat higher
expense and power consumption. This enables loading from SATA
using a configured device.
config SPL_SATA_RAW_U_BOOT_USE_SECTOR
bool "SATA raw mode: by sector"
depends on SPL_SATA
default y if ARCH_MVEBU
help
Use sector number for specifying U-Boot location on SATA disk in
raw mode.
config SPL_SATA_RAW_U_BOOT_SECTOR
hex "Sector on the SATA disk to load U-Boot from"
depends on SPL_SATA_RAW_U_BOOT_USE_SECTOR
default 0x1 if ARCH_MVEBU
help
Sector on the SATA disk to load U-Boot from, when the SATA disk is being
used in raw mode. Units: SATA disk sectors (1 sector = 512 bytes).
config SPL_SERIAL
bool "Support serial"
select SPL_PRINTF
select SPL_STRTO
help
Enable support for serial in SPL. This allows use of a serial UART
for displaying messages while SPL is running. It also brings in
printf() and panic() functions. This should normally be enabled
unless there are space reasons not to. Even then, consider
enabling SPL_USE_TINY_PRINTF which is a small printf() version.
config SPL_SPI
bool "Support SPI drivers"
help
Enable support for using SPI in SPL. This is used for connecting
to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
more details on that. The SPI driver provides the transport for
data between the SPI flash and the CPU. This option can be used to
enable SPI drivers that are needed for other purposes also, such
as a SPI PMIC.
config SPL_SPI_FLASH_SUPPORT
bool "Support SPI flash drivers"
depends on SPL_SPI
help
Enable support for using SPI flash in SPL, and loading U-Boot from
SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
the SPI bus that is used to connect it to a system. It is a simple
but fast bidirectional 4-wire bus (clock, chip select and two data
lines). This enables the drivers in drivers/mtd/spi as part of an
SPL build. This normally requires SPL_SPI.
if SPL_SPI_FLASH_SUPPORT
config SPL_SPI_FLASH_TINY
bool "Enable low footprint SPL SPI Flash support"
depends on !SPI_FLASH_BAR
default y if SPI_FLASH
help
Enable lightweight SPL SPI Flash support that supports just reading
data/images from flash. No support to write/erase flash. Enable
this if you have SPL size limitations and don't need full
fledged SPI flash support.
config SPL_SPI_FLASH_SFDP_SUPPORT
bool "SFDP table parsing support for SPI NOR flashes"
depends on !SPI_FLASH_BAR && !SPL_SPI_FLASH_TINY
help
Enable support for parsing and auto discovery of parameters for
SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
tables as per JESD216 standard in SPL.
config SPL_SPI_FLASH_MTD
bool "Support for SPI flash MTD drivers in SPL"
help
Enable support for SPI flash MTD drivers in SPL.
config SPL_SPI_LOAD
bool "Support loading from SPI flash"
help
Enable support for loading next stage, U-Boot or otherwise, from
SPI NOR in U-Boot SPL.
endif # SPL_SPI_FLASH_SUPPORT
config SYS_SPI_U_BOOT_OFFS
hex "address of u-boot payload in SPI flash"
default 0x8000 if ARCH_SUNXI
default 0x0
depends on SPL_SPI_LOAD || SPL_SPI_SUNXI
help
Address within SPI-Flash from where the u-boot payload is fetched
from.
config SPL_THERMAL
bool "Driver support for thermal devices"
help
Enable support for temperature-sensing devices. Some SoCs have on-chip
temperature sensors to permit warnings, speed throttling or even
automatic power-off when the temperature gets too high or low. Other
devices may be discrete but connected on a suitable bus.
config SPL_USB_HOST
bool "Support USB host drivers"
select HAVE_BLOCK_DEVICE
help
Enable access to USB (Universal Serial Bus) host devices so that
SPL can load U-Boot from a connected USB peripheral, such as a USB
flash stick. While USB takes a little longer to start up than most
buses, it is very flexible since many different types of storage
device can be attached. This option enables the drivers in
drivers/usb/host as part of an SPL build.
config SPL_USB_STORAGE
bool "Support loading from USB"
depends on SPL_USB_HOST && !(BLK && !DM_USB)
help
Enable support for USB devices in SPL. This allows use of USB
devices such as hard drives and flash drivers for loading U-Boot.
The actual drivers are enabled separately using the normal U-Boot
config options. This enables loading from USB using a configured
device.
config SPL_USB_GADGET
bool "Suppport USB Gadget drivers"
help
Enable USB Gadget API which allows to enable USB device functions
in SPL.
if SPL_USB_GADGET
config SPL_USB_ETHER
bool "Support USB Ethernet drivers"
depends on SPL_NET
help
Enable access to the USB network subsystem and associated
drivers in SPL. This permits SPL to load U-Boot over a
USB-connected Ethernet link (such as a USB Ethernet dongle) rather
than from an onboard peripheral. Environment support is required
since the network stack uses a number of environment variables.
See also SPL_NET and SPL_ETH.
config SPL_DFU
bool "Support DFU (Device Firmware Upgrade)"
select SPL_HASH
select SPL_DFU_NO_RESET
depends on SPL_RAM_SUPPORT
help
This feature enables the DFU (Device Firmware Upgrade) in SPL with
RAM memory device support. The ROM code will load and execute
the SPL built with dfu. The user can load binaries (u-boot/kernel) to
selected device partition from host-pc using dfu-utils.
This feature is useful to flash the binaries to factory or bare-metal
boards using USB interface.
choice
bool "DFU device selection"
depends on SPL_DFU
config SPL_DFU_RAM
bool "RAM device"
depends on SPL_DFU && SPL_RAM_SUPPORT
help
select RAM/DDR memory device for loading binary images
(u-boot/kernel) to the selected device partition using
DFU and execute the u-boot/kernel from RAM.
endchoice
config SPL_USB_SDP_SUPPORT
bool "Support SDP (Serial Download Protocol)"
depends on SPL_SERIAL
help
Enable Serial Download Protocol (SDP) device support in SPL. This
allows to download images into memory and execute (jump to) them
using the same protocol as implemented by the i.MX family's boot ROM.
config SPL_SDP_USB_DEV
int "SDP USB controller index"
default 0
depends on SPL_USB_SDP_SUPPORT
help
Some boards have USB controller other than 0. Define this option
so it can be used in compiled environment.
endif
config SPL_WATCHDOG
bool "Support watchdog drivers"
imply SPL_WDT if !HW_WATCHDOG
help
Enable support for watchdog drivers in SPL. A watchdog is
typically a hardware peripheral which can reset the system when it
detects no activity for a while (such as a software crash). This
enables the drivers in drivers/watchdog as part of an SPL build.
config SPL_YMODEM_SUPPORT
bool "Support loading using Ymodem"
depends on SPL_SERIAL
help
While loading from serial is slow it can be a useful backup when
there is no other option. The Ymodem protocol provides a reliable
means of transmitting U-Boot over a serial line for using in SPL,
with a checksum to ensure correctness.
config SPL_ATF
bool "Support ARM Trusted Firmware"
depends on ARM64 && SPL_FIT
help
ATF(ARM Trusted Firmware) is a component for ARM AArch64 which
is loaded by SPL (which is considered as BL2 in ATF terminology).
More detail at: https://github.com/ARM-software/arm-trusted-firmware
config SPL_ATF_LOAD_IMAGE_V2
bool "Use the new LOAD_IMAGE_V2 parameter passing"
depends on SPL_ATF
help
Some platforms use the newer LOAD_IMAGE_V2 parameter passing.
If you want to load a bl31 image from the SPL and need the new
method, say Y.
config SPL_ATF_NO_PLATFORM_PARAM
bool "Pass no platform parameter"
depends on SPL_ATF
help
While we expect to call a pointer to a valid FDT (or NULL)
as the platform parameter to an ATF, some ATF versions are
not U-Boot aware and have an insufficiently robust parameter
validation to gracefully reject a FDT being passed.
If this option is enabled, the spl_atf os-type handler will
always pass NULL for the platform parameter.
If your ATF is affected, say Y.
config SPL_AM33XX_ENABLE_RTC32K_OSC
bool "Enable the RTC32K OSC on AM33xx based platforms"
default y if AM33XX
help
Enable access to the AM33xx RTC and select the external 32kHz clock
source.
config SPL_OPTEE_IMAGE
bool "Support OP-TEE Trusted OS image in SPL"
depends on ARM
help
OP-TEE is an open source Trusted OS which is loaded by SPL.
More detail at: https://github.com/OP-TEE/optee_os
config SPL_OPENSBI
bool "Support RISC-V OpenSBI"
depends on RISCV && SPL_RISCV_MMODE && RISCV_SMODE
help
OpenSBI is an open-source implementation of the RISC-V Supervisor Binary
Interface (SBI) specification. U-Boot supports the OpenSBI FW_DYNAMIC
firmware. It is loaded and started by U-Boot SPL.
More details are available at https://github.com/riscv/opensbi and
https://github.com/riscv/riscv-sbi-doc
config SPL_OPENSBI_LOAD_ADDR
hex "OpenSBI load address"
depends on SPL_OPENSBI
help
Load address of the OpenSBI binary.
config TPL
bool
depends on SUPPORT_TPL
prompt "Enable TPL"
help
If you want to build TPL as well as the normal image and SPL, say Y.
if TPL
config TPL_SIZE_LIMIT
hex "Maximum size of TPL image"
depends on TPL
default 0x0
help
Specifies the maximum length of the U-Boot TPL image.
If this value is zero, it is ignored.
config TPL_BINMAN_SYMBOLS
bool "Declare binman symbols in TPL"
depends on SPL_FRAMEWORK && BINMAN
default y
help
This enables use of symbols in TPL which refer to U-Boot, enabling TPL
to obtain the location of U-Boot simply by calling spl_get_image_pos()
and spl_get_image_size().
For this to work, you must have a U-Boot image in the binman image, so
binman can update TPL with the location of it.
config TPL_FRAMEWORK
bool "Support TPL based upon the common SPL framework"
default y if SPL_FRAMEWORK
help
Enable the SPL framework under common/spl/ for TPL builds.
This framework supports MMC, NAND and YMODEM and other methods
loading of U-Boot's SPL stage. If unsure, say Y.
config TPL_HANDOFF
bool "Pass hand-off information from TPL to SPL and U-Boot proper"
depends on HANDOFF && TPL_BLOBLIST
default y
help
This option enables TPL to write handoff information. This can be
used to pass information like the size of SDRAM from TPL to U-Boot
proper. The information is also available to SPL if it is useful
there.
config TPL_BOARD_INIT
bool "Call board-specific initialization in TPL"
help
If this option is enabled, U-Boot will call the function
spl_board_init() from board_init_r(). This function should be
provided by the board.
config TPL_BOOTCOUNT_LIMIT
bool "Support bootcount in TPL"
depends on TPL_ENV_SUPPORT
help
If this option is enabled, the TPL will support bootcount.
For example, it may be useful to choose the device to boot.
config TPL_LDSCRIPT
string "Linker script for the TPL stage"
depends on TPL
default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
default "arch/\$(ARCH)/cpu/u-boot-spl.lds"
help
The TPL stage will usually require a different linker-script
(as it runs from a different memory region) than the regular
U-Boot stage. Set this to the path of the linker-script to
be used for TPL.
May be left empty to trigger the Makefile infrastructure to
fall back to the linker-script used for the SPL stage.
config TPL_NEEDS_SEPARATE_STACK
bool "TPL needs a separate initial stack-pointer"
depends on TPL
help
Enable, if the TPL stage should not inherit its initial
stack-pointer from the settings for the SPL stage.
config TPL_POWER
bool "Support power drivers"
help
Enable support for power control in TPL. This includes support
for PMICs (Power-management Integrated Circuits) and some of the
features provided by PMICs. In particular, voltage regulators can
be used to enable/disable power and vary its voltage. That can be
useful in TPL to turn on boot peripherals and adjust CPU voltage
so that the clock speed can be increased. This enables the drivers
in drivers/power, drivers/power/pmic and drivers/power/regulator
as part of an TPL build.
config TPL_TEXT_BASE
hex "Base address for the .text section of the TPL stage"
default 0
help
The base address for the .text section of the TPL stage.
config TPL_MAX_SIZE
int "Maximum size (in bytes) for the TPL stage"
default 0
depends on TPL
help
The maximum size (in bytes) of the TPL stage.
config TPL_STACK
hex "Address of the initial stack-pointer for the TPL stage"
depends on TPL_NEEDS_SEPARATE_STACK
help
The address of the initial stack-pointer for the TPL stage.
Usually this will be the (aligned) top-of-stack.
config TPL_READ_ONLY
bool
depends on TPL_OF_PLATDATA
select TPL_OF_PLATDATA_NO_BIND
select TPL_OF_PLATDATA_RT
help
Some platforms (e.g. x86 Apollo Lake) load SPL into a read-only
section of memory. This means that of-platdata must make a copy (in
writeable memory) of anything it wants to modify, such as
device-private data.
config TPL_BOOTROM_SUPPORT
bool "Support returning to the BOOTROM (from TPL)"
help
Some platforms (e.g. the Rockchip RK3368) provide support in their
ROM for loading the next boot-stage after performing basic setup
from the TPL stage.
Enable this option, to return to the BOOTROM through the
BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
boot device list, if not implemented for a given board)
config TPL_CRC32
bool "Support CRC32 in TPL"
default y if TPL_ENV_SUPPORT || TPL_BLOBLIST
help
Enable this to support CRC32 in uImages or FIT images within SPL.
This is a 32-bit checksum value that can be used to verify images.
For FIT images, this is the least secure type of checksum, suitable
for detected accidental image corruption. For secure applications you
should consider SHA1 or SHA256.
config TPL_DRIVERS_MISC
bool "Support misc drivers in TPL"
help
Enable miscellaneous drivers in TPL. These drivers perform various
tasks that don't fall nicely into other categories, Enable this
option to build the drivers in drivers/misc as part of an TPL
build, for those that support building in TPL (not all drivers do).
config TPL_ENV_SUPPORT
bool "Support an environment"
help
Enable environment support in TPL. See SPL_ENV_SUPPORT for details.
config TPL_GPIO
bool "Support GPIO in TPL"
help
Enable support for GPIOs (General-purpose Input/Output) in TPL.
GPIOs allow U-Boot to read the state of an input line (high or
low) and set the state of an output line. This can be used to
drive LEDs, control power to various system parts and read user
input. GPIOs can be useful in TPL to enable a 'sign-of-life' LED,
for example. Enable this option to build the drivers in
drivers/gpio as part of an TPL build.
config TPL_I2C
bool "Support I2C"
help
Enable support for the I2C bus in TPL. See SPL_I2C for
details.
config TPL_LIBCOMMON_SUPPORT
bool "Support common libraries"
help
Enable support for common U-Boot libraries within TPL. See
SPL_LIBCOMMON_SUPPORT for details.
config TPL_LIBGENERIC_SUPPORT
bool "Support generic libraries"
help
Enable support for generic U-Boot libraries within TPL. See
SPL_LIBGENERIC_SUPPORT for details.
config TPL_MPC8XXX_INIT_DDR
bool "Support MPC8XXX DDR init"
help
Enable support for DDR-SDRAM on the MPC8XXX family within TPL. See
SPL_MPC8XXX_INIT_DDR for details.
config TPL_MMC
bool "Support MMC"
depends on MMC
help
Enable support for MMC within TPL. See SPL_MMC for details.
config TPL_NAND_SUPPORT
bool "Support NAND flash"
help
Enable support for NAND in TPL. See SPL_NAND_SUPPORT for details.
config TPL_PCI
bool "Support PCI drivers"
help
Enable support for PCI in TPL. For platforms that need PCI to boot,
or must perform some init using PCI in SPL, this provides the
necessary driver support. This enables the drivers in drivers/pci
as part of a TPL build.
config TPL_PCH
bool "Support PCH drivers"
help
Enable support for PCH (Platform Controller Hub) devices in TPL.
These are used to set up GPIOs and the SPI peripheral early in
boot. This enables the drivers in drivers/pch as part of a TPL
build.
config TPL_RAM_SUPPORT
bool "Support booting from RAM"
help
Enable booting of an image in RAM. The image can be preloaded or
it can be loaded by TPL directly into RAM (e.g. using USB).
config TPL_RAM_DEVICE
bool "Support booting from preloaded image in RAM"
depends on TPL_RAM_SUPPORT
help
Enable booting of an image already loaded in RAM. The image has to
be already in memory when TPL takes over, e.g. loaded by the boot
ROM.
config TPL_RTC
bool "Support RTC drivers"
help
Enable RTC (Real-time Clock) support in TPL. This includes support
for reading and setting the time. Some RTC devices also have some
non-volatile (battery-backed) memory which is accessible if
needed. This enables the drivers in drivers/rtc as part of an TPL
build.
config TPL_SERIAL
bool "Support serial"
select TPL_PRINTF
select TPL_STRTO
help
Enable support for serial in TPL. See SPL_SERIAL for
details.
config TPL_SPI_FLASH_SUPPORT
bool "Support SPI flash drivers"
help
Enable support for using SPI flash in TPL. See SPL_SPI_FLASH_SUPPORT
for details.
config TPL_SPI_FLASH_TINY
bool "Enable low footprint TPL SPI Flash support"
depends on TPL_SPI_FLASH_SUPPORT && !SPI_FLASH_BAR
default y if SPI_FLASH
help
Enable lightweight TPL SPI Flash support that supports just reading
data/images from flash. No support to write/erase flash. Enable
this if you have TPL size limitations and don't need full-fledged
SPI flash support.
config TPL_SPI_LOAD
bool "Support loading from SPI flash"
depends on TPL_SPI_FLASH_SUPPORT
help
Enable support for loading next stage, U-Boot or otherwise, from
SPI NOR in U-Boot TPL.
config TPL_SPI
bool "Support SPI drivers"
help
Enable support for using SPI in TPL. See SPL_SPI for
details.
config TPL_DM_SPI
bool "Support SPI DM drivers in TPL"
help
Enable support for SPI DM drivers in TPL.
config TPL_DM_SPI_FLASH
bool "Support SPI DM FLASH drivers in TPL"
help
Enable support for SPI DM flash drivers in TPL.
config TPL_YMODEM_SUPPORT
bool "Support loading using Ymodem"
depends on TPL_SERIAL
help
While loading from serial is slow it can be a useful backup when
there is no other option. The Ymodem protocol provides a reliable
means of transmitting U-Boot over a serial line for using in TPL,
with a checksum to ensure correctness.
endif # TPL
config SPL_AT91_MCK_BYPASS
bool "Use external clock signal as a source of main clock for AT91 platforms"
depends on ARCH_AT91
help
Use external 8 to 24 Mhz clock signal as source of main clock instead
of an external crystal oscillator.
This option disables the internal driving on the XOUT pin.
The external source has to provide a stable clock on the XIN pin.
If this option is disabled, the SoC expects a crystal oscillator
that needs driving on both XIN and XOUT lines.
endif # SPL
endmenu