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
  	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
  	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"
  	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"
  	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"
  	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
  	  Some OSes do not support device tree. Bootstage can instead write
  	  the boot timing information in a binary format at a given address.
  	  This happens through a call to bootstage_stash(), typically in
  	  the CPU's cleanup_before_linux() function. You can use the
  	  'bootstage stash' and 'bootstage unstash' commands to do this on
  	  the command line.
  
  config BOOTSTAGE_STASH_ADDR
  	hex "Address to stash boot timing information"
  	default 0
  	help
  	  Provide an address which will not be overwritten by the OS when it
  	  starts, so that it can read this information when ready.
  
  config BOOTSTAGE_STASH_SIZE
  	hex "Size of boot timing stash region"

  	default 0x1000

  	help
  	  This should be large enough to hold the bootstage stash. A value of
  	  4096 (4KiB) is normally plenty.

  config SHOW_BOOT_PROGRESS
  	bool "Show boot progress in a board-specific manner"
  	help
  	  Defining this option allows to add some board-specific code (calling
  	  a user-provided function show_boot_progress(int) that enables you to
  	  show the system's boot progress on some display (for example, some
  	  LEDs) on your board. At the moment, the following checkpoints are
  	  implemented:
  
  	  Legacy uImage format:
  
  	  Arg	Where			When
  	    1	common/cmd_bootm.c	before attempting to boot an image
  	   -1	common/cmd_bootm.c	Image header has bad	 magic number
  	    2	common/cmd_bootm.c	Image header has correct magic number
  	   -2	common/cmd_bootm.c	Image header has bad	 checksum
  	    3	common/cmd_bootm.c	Image header has correct checksum
  	   -3	common/cmd_bootm.c	Image data   has bad	 checksum
  	    4	common/cmd_bootm.c	Image data   has correct checksum
  	   -4	common/cmd_bootm.c	Image is for unsupported architecture
  	    5	common/cmd_bootm.c	Architecture check OK
  	   -5	common/cmd_bootm.c	Wrong Image Type (not kernel, multi)
  	    6	common/cmd_bootm.c	Image Type check OK
  	   -6	common/cmd_bootm.c	gunzip uncompression error
  	   -7	common/cmd_bootm.c	Unimplemented compression type
  	    7	common/cmd_bootm.c	Uncompression OK
  	    8	common/cmd_bootm.c	No uncompress/copy overwrite error
  	   -9	common/cmd_bootm.c	Unsupported OS (not Linux, BSD, VxWorks, QNX)
  
  	    9	common/image.c		Start initial ramdisk verification
  	  -10	common/image.c		Ramdisk header has bad	   magic number
  	  -11	common/image.c		Ramdisk header has bad	   checksum
  	   10	common/image.c		Ramdisk header is OK
  	  -12	common/image.c		Ramdisk data   has bad	   checksum
  	   11	common/image.c		Ramdisk data   has correct checksum
  	   12	common/image.c		Ramdisk verification complete, start loading
  	  -13	common/image.c		Wrong Image Type (not PPC Linux ramdisk)
  	   13	common/image.c		Start multifile image verification
  	   14	common/image.c		No initial ramdisk, no multifile, continue.
  
  	   15	arch/<arch>/lib/bootm.c All preparation done, transferring control to OS
  
  	  -30	arch/powerpc/lib/board.c	Fatal error, hang the system
  	  -31	post/post.c		POST test failed, detected by post_output_backlog()
  	  -32	post/post.c		POST test failed, detected by post_run_single()
  
  	   34	common/cmd_doc.c	before loading a Image from a DOC device
  	  -35	common/cmd_doc.c	Bad usage of "doc" command
  	   35	common/cmd_doc.c	correct usage of "doc" command
  	  -36	common/cmd_doc.c	No boot device
  	   36	common/cmd_doc.c	correct boot device
  	  -37	common/cmd_doc.c	Unknown Chip ID on boot device
  	   37	common/cmd_doc.c	correct chip ID found, device available
  	  -38	common/cmd_doc.c	Read Error on boot device
  	   38	common/cmd_doc.c	reading Image header from DOC device OK
  	  -39	common/cmd_doc.c	Image header has bad magic number
  	   39	common/cmd_doc.c	Image header has correct magic number
  	  -40	common/cmd_doc.c	Error reading Image from DOC device
  	   40	common/cmd_doc.c	Image header has correct magic number
  	   41	common/cmd_ide.c	before loading a Image from a IDE device
  	  -42	common/cmd_ide.c	Bad usage of "ide" command
  	   42	common/cmd_ide.c	correct usage of "ide" command
  	  -43	common/cmd_ide.c	No boot device
  	   43	common/cmd_ide.c	boot device found
  	  -44	common/cmd_ide.c	Device not available
  	   44	common/cmd_ide.c	Device available
  	  -45	common/cmd_ide.c	wrong partition selected
  	   45	common/cmd_ide.c	partition selected
  	  -46	common/cmd_ide.c	Unknown partition table
  	   46	common/cmd_ide.c	valid partition table found
  	  -47	common/cmd_ide.c	Invalid partition type
  	   47	common/cmd_ide.c	correct partition type
  	  -48	common/cmd_ide.c	Error reading Image Header on boot device
  	   48	common/cmd_ide.c	reading Image Header from IDE device OK
  	  -49	common/cmd_ide.c	Image header has bad magic number
  	   49	common/cmd_ide.c	Image header has correct magic number
  	  -50	common/cmd_ide.c	Image header has bad	 checksum
  	   50	common/cmd_ide.c	Image header has correct checksum
  	  -51	common/cmd_ide.c	Error reading Image from IDE device
  	   51	common/cmd_ide.c	reading Image from IDE device OK
  	   52	common/cmd_nand.c	before loading a Image from a NAND device
  	  -53	common/cmd_nand.c	Bad usage of "nand" command
  	   53	common/cmd_nand.c	correct usage of "nand" command
  	  -54	common/cmd_nand.c	No boot device
  	   54	common/cmd_nand.c	boot device found
  	  -55	common/cmd_nand.c	Unknown Chip ID on boot device
  	   55	common/cmd_nand.c	correct chip ID found, device available
  	  -56	common/cmd_nand.c	Error reading Image Header on boot device
  	   56	common/cmd_nand.c	reading Image Header from NAND device OK
  	  -57	common/cmd_nand.c	Image header has bad magic number
  	   57	common/cmd_nand.c	Image header has correct magic number
  	  -58	common/cmd_nand.c	Error reading Image from NAND device
  	   58	common/cmd_nand.c	reading Image from NAND device OK
  
  	  -60	common/env_common.c	Environment has a bad CRC, using default
  
  	   64	net/eth.c		starting with Ethernet configuration.
  	  -64	net/eth.c		no Ethernet found.
  	   65	net/eth.c		Ethernet found.
  
  	  -80	common/cmd_net.c	usage wrong
  	   80	common/cmd_net.c	before calling net_loop()
  	  -81	common/cmd_net.c	some error in net_loop() occurred
  	   81	common/cmd_net.c	net_loop() back without error
  	  -82	common/cmd_net.c	size == 0 (File with size 0 loaded)
  	   82	common/cmd_net.c	trying automatic boot
  	   83	common/cmd_net.c	running "source" command
  	  -83	common/cmd_net.c	some error in automatic boot or "source" command
  	   84	common/cmd_net.c	end without errors
  
  	  FIT uImage format:
  
  	  Arg	Where			When
  	  100	common/cmd_bootm.c	Kernel FIT Image has correct format
  	  -100	common/cmd_bootm.c	Kernel FIT Image has incorrect format
  	  101	common/cmd_bootm.c	No Kernel subimage unit name, using configuration
  	  -101	common/cmd_bootm.c	Can't get configuration for kernel subimage
  	  102	common/cmd_bootm.c	Kernel unit name specified
  	  -103	common/cmd_bootm.c	Can't get kernel subimage node offset
  	  103	common/cmd_bootm.c	Found configuration node
  	  104	common/cmd_bootm.c	Got kernel subimage node offset
  	  -104	common/cmd_bootm.c	Kernel subimage hash verification failed
  	  105	common/cmd_bootm.c	Kernel subimage hash verification OK
  	  -105	common/cmd_bootm.c	Kernel subimage is for unsupported architecture
  	  106	common/cmd_bootm.c	Architecture check OK
  	  -106	common/cmd_bootm.c	Kernel subimage has wrong type
  	  107	common/cmd_bootm.c	Kernel subimage type OK
  	  -107	common/cmd_bootm.c	Can't get kernel subimage data/size
  	  108	common/cmd_bootm.c	Got kernel subimage data/size
  	  -108	common/cmd_bootm.c	Wrong image type (not legacy, FIT)
  	  -109	common/cmd_bootm.c	Can't get kernel subimage type
  	  -110	common/cmd_bootm.c	Can't get kernel subimage comp
  	  -111	common/cmd_bootm.c	Can't get kernel subimage os
  	  -112	common/cmd_bootm.c	Can't get kernel subimage load address
  	  -113	common/cmd_bootm.c	Image uncompress/copy overwrite error
  
  	  120	common/image.c		Start initial ramdisk verification
  	  -120	common/image.c		Ramdisk FIT image has incorrect format
  	  121	common/image.c		Ramdisk FIT image has correct format
  	  122	common/image.c		No ramdisk subimage unit name, using configuration
  	  -122	common/image.c		Can't get configuration for ramdisk subimage
  	  123	common/image.c		Ramdisk unit name specified
  	  -124	common/image.c		Can't get ramdisk subimage node offset
  	  125	common/image.c		Got ramdisk subimage node offset
  	  -125	common/image.c		Ramdisk subimage hash verification failed
  	  126	common/image.c		Ramdisk subimage hash verification OK
  	  -126	common/image.c		Ramdisk subimage for unsupported architecture
  	  127	common/image.c		Architecture check OK
  	  -127	common/image.c		Can't get ramdisk subimage data/size
  	  128	common/image.c		Got ramdisk subimage data/size
  	  129	common/image.c		Can't get ramdisk load address
  	  -129	common/image.c		Got ramdisk load address
  
  	  -130	common/cmd_doc.c	Incorrect FIT image format
  	  131	common/cmd_doc.c	FIT image format OK
  
  	  -140	common/cmd_ide.c	Incorrect FIT image format
  	  141	common/cmd_ide.c	FIT image format OK
  
  	  -150	common/cmd_nand.c	Incorrect FIT image format
  	  151	common/cmd_nand.c	FIT image format OK

  endmenu

  menu "Boot media"
  
  config NOR_BOOT
  	bool "Support for booting from NOR flash"
  	depends on NOR
  	help
  	  Enabling this will make a U-Boot binary that is capable of being
  	  booted via NOR.  In this case we will enable certain pinmux early
  	  as the ROM only partially sets up pinmux.  We also default to using
  	  NOR for environment.

  config NAND_BOOT
  	bool "Support for booting from NAND flash"
  	default n

  	imply MTD_RAW_NAND

  	help
  	  Enabling this will make a U-Boot binary that is capable of being
  	  booted via NAND flash. This is not a must, some SoCs need this,

  	  some not.

  
  config ONENAND_BOOT
  	bool "Support for booting from ONENAND"
  	default n

  	imply MTD_RAW_NAND

  	help
  	  Enabling this will make a U-Boot binary that is capable of being
  	  booted via ONENAND. This is not a must, some SoCs need this,

  	  some not.

  
  config QSPI_BOOT
  	bool "Support for booting from QSPI flash"
  	default n
  	help
  	  Enabling this will make a U-Boot binary that is capable of being
  	  booted via QSPI flash. This is not a must, some SoCs need this,

  	  some not.

  
  config SATA_BOOT
  	bool "Support for booting from SATA"
  	default n
  	help
  	  Enabling this will make a U-Boot binary that is capable of being
  	  booted via SATA. This is not a must, some SoCs need this,

  	  some not.

  
  config SD_BOOT
  	bool "Support for booting from SD/EMMC"
  	default n
  	help
  	  Enabling this will make a U-Boot binary that is capable of being
  	  booted via SD/EMMC. This is not a must, some SoCs need this,

  	  some not.

  
  config SPI_BOOT
  	bool "Support for booting from SPI flash"
  	default n
  	help
  	  Enabling this will make a U-Boot binary that is capable of being
  	  booted via SPI flash. This is not a must, some SoCs need this,

  	  some not.

  endmenu

  config BOOTDELAY
  	int "delay in seconds before automatically booting"

  	default 2

  	depends on AUTOBOOT

  	help
  	  Delay before automatically running bootcmd;

  	  set to 0 to autoboot with no delay, but you can stop it by key input.

  	  set to -1 to disable autoboot.
  	  set to -2 to autoboot with no delay and not check for abort

  	  If this value is >= 0 then it is also used for the default delay
  	  before starting the default entry in bootmenu. If it is < 0 then
  	  a default value of 10s is used.

  	  See doc/README.autoboot for details.

  config USE_BOOTARGS
  	bool "Enable boot arguments"
  	help
  	  Provide boot arguments to bootm command. Boot arguments are specified
  	  in CONFIG_BOOTARGS option. Enable this option to be able to specify
  	  CONFIG_BOOTARGS string. If this option is disabled, CONFIG_BOOTARGS
  	  will be undefined and won't take any space in U-Boot image.
  
  config BOOTARGS
  	string "Boot arguments"
  	depends on USE_BOOTARGS
  	help
  	  This can be used to pass arguments to the bootm command. The value of
  	  CONFIG_BOOTARGS goes into the environment value "bootargs". Note that
  	  this value will also override the "chosen" node in FDT blob.

  config USE_BOOTCOMMAND
  	bool "Enable a default value for bootcmd"
  	help
  	  Provide a default value for the bootcmd entry in the environment.  If
  	  autoboot is enabled this is what will be run automatically.  Enable
  	  this option to be able to specify CONFIG_BOOTCOMMAND as a string.  If
  	  this option is disabled, CONFIG_BOOTCOMMAND will be undefined and
  	  won't take any space in U-Boot image.
  
  config BOOTCOMMAND
  	string "bootcmd value"
  	depends on USE_BOOTCOMMAND
  	default "run distro_bootcmd" if DISTRO_DEFAULTS
  	help
  	  This is the string of commands that will be used as bootcmd and if
  	  AUTOBOOT is set, automatically run.

  config USE_PREBOOT
  	bool "Enable preboot"
  	help
  	  When this option is enabled, the existence of the environment
  	  variable "preboot" will be checked immediately before starting the
  	  CONFIG_BOOTDELAY countdown and/or running the auto-boot command resp.
  	  entering interactive mode.
  
  	  This feature is especially useful when "preboot" is automatically
  	  generated or modified. For example, the boot code can modify the
  	  "preboot" when a user holds down a certain combination of keys.
  
  config PREBOOT
  	string "preboot default value"
  	depends on USE_PREBOOT

  	default ""

  	help
  	  This is the default of "preboot" environment variable.

  menu "Console"

  config MENU
  	bool
  	help
  	  This is the library functionality to provide a text-based menu of
  	  choices for the user to make choices with.

  config CONSOLE_RECORD
  	bool "Console recording"
  	help
  	  This provides a way to record console output (and provide console

  	  input) through circular buffers. This is mostly useful for testing.

  	  Console output is recorded even when the console is silent.
  	  To enable console recording, call console_record_reset_enable()
  	  from your code.
  
  config CONSOLE_RECORD_OUT_SIZE
  	hex "Output buffer size"
  	depends on CONSOLE_RECORD
  	default 0x400 if CONSOLE_RECORD
  	help
  	  Set the size of the console output buffer. When this fills up, no
  	  more data will be recorded until some is removed. The buffer is
  	  allocated immediately after the malloc() region is ready.
  
  config CONSOLE_RECORD_IN_SIZE
  	hex "Input buffer size"
  	depends on CONSOLE_RECORD
  	default 0x100 if CONSOLE_RECORD
  	help
  	  Set the size of the console input buffer. When this contains data,
  	  tstc() and getc() will use this in preference to real device input.
  	  The buffer is allocated immediately after the malloc() region is
  	  ready.

  config DISABLE_CONSOLE
  	bool "Add functionality to disable console completely"
  	help
  		Disable console (in & out).

  config IDENT_STRING
  	string "Board specific string to be added to uboot version string"
  	help
  	  This options adds the board specific name to u-boot version.

  config LOGLEVEL
  	int "loglevel"

  	default 4

  	range 0 10

  	help
  	  All Messages with a loglevel smaller than the console loglevel will
  	  be compiled in. The loglevels are defined as follows:

  	    0 - emergency
  	    1 - alert
  	    2 - critical
  	    3 - error
  	    4 - warning
  	    5 - note
  	    6 - info
  	    7 - debug
  	    8 - debug content
  	    9 - debug hardware I/O

  
  config SPL_LOGLEVEL
  	int
  	default LOGLEVEL

  config TPL_LOGLEVEL
  	int
  	default LOGLEVEL

  config SILENT_CONSOLE
  	bool "Support a silent console"
  	help
  	  This option allows the console to be silenced, meaning that no
  	  output will appear on the console devices. This is controlled by

  	  setting the environment variable 'silent' to a non-empty value.

  	  Note this also silences the console when booting Linux.
  
  	  When the console is set up, the variable is checked, and the
  	  GD_FLG_SILENT flag is set. Changing the environment variable later
  	  will update the flag.
  
  config SILENT_U_BOOT_ONLY
  	bool "Only silence the U-Boot console"
  	depends on SILENT_CONSOLE
  	help
  	  Normally when the U-Boot console is silenced, Linux's console is
  	  also silenced (assuming the board boots into Linux). This option
  	  allows the linux console to operate normally, even if U-Boot's
  	  is silenced.
  
  config SILENT_CONSOLE_UPDATE_ON_SET
  	bool "Changes to the 'silent' environment variable update immediately"
  	depends on SILENT_CONSOLE
  	default y if SILENT_CONSOLE
  	help
  	  When the 'silent' environment variable is changed, update the
  	  console silence flag immediately. This allows 'setenv' to be used
  	  to silence or un-silence the console.
  
  	  The effect is that any change to the variable will affect the
  	  GD_FLG_SILENT flag.
  
  config SILENT_CONSOLE_UPDATE_ON_RELOC
  	bool "Allow flags to take effect on relocation"
  	depends on SILENT_CONSOLE
  	help
  	  In some cases the environment is not available until relocation
  	  (e.g. NAND). This option makes the value of the 'silent'
  	  environment variable take effect at relocation.

  config PRE_CONSOLE_BUFFER
  	bool "Buffer characters before the console is available"
  	help
  	  Prior to the console being initialised (i.e. serial UART
  	  initialised etc) all console output is silently discarded.
  	  Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to
  	  buffer any console messages prior to the console being
  	  initialised to a buffer. The buffer is a circular buffer, so
  	  if it overflows, earlier output is discarded.
  
  	  Note that this is not currently supported in SPL. It would be
  	  useful to be able to share the pre-console buffer with SPL.
  
  config PRE_CON_BUF_SZ
  	int "Sets the size of the pre-console buffer"
  	depends on PRE_CONSOLE_BUFFER
  	default 4096
  	help
  	  The size of the pre-console buffer affects how much console output
  	  can be held before it overflows and starts discarding earlier
  	  output. Normally there is very little output at this early stage,
  	  unless debugging is enabled, so allow enough for ~10 lines of
  	  text.
  
  	  This is a useful feature if you are using a video console and
  	  want to see the full boot output on the console. Without this
  	  option only the post-relocation output will be displayed.
  
  config PRE_CON_BUF_ADDR
  	hex "Address of the pre-console buffer"
  	depends on PRE_CONSOLE_BUFFER
  	default 0x2f000000 if ARCH_SUNXI && MACH_SUN9I
  	default 0x4f000000 if ARCH_SUNXI && !MACH_SUN9I

  	default 0x0f000000 if ROCKCHIP_RK3288

  	default 0x0f200000 if ROCKCHIP_RK3399

  	help
  	  This sets the start address of the pre-console buffer. This must
  	  be in available memory and is accessed before relocation and
  	  possibly before DRAM is set up. Therefore choose an address
  	  carefully.
  
  	  We should consider removing this option and allocating the memory
  	  in board_init_f_init_reserve() instead.

  config CONSOLE_MUX
  	bool "Enable console multiplexing"
  	default y if DM_VIDEO || VIDEO || LCD
  	help
  	  This allows multiple devices to be used for each console 'file'.
  	  For example, stdout can be set to go to serial and video.
  	  Similarly, stdin can be set to come from serial and keyboard.
  	  Input can be provided from either source. Console multiplexing
  	  adds a small amount of size to U-Boot.  Changes to the environment
  	  variables stdout, stdin and stderr will take effect immediately.
  
  config SYS_CONSOLE_IS_IN_ENV
  	bool "Select console devices from the environment"
  	default y if CONSOLE_MUX
  	help
  	  This allows multiple input/output devices to be set at boot time.
  	  For example, if stdout is set to "serial,video" then output will
  	  be sent to both the serial and video devices on boot. The
  	  environment variables can be updated after boot to change the
  	  input/output devices.

  config SYS_CONSOLE_OVERWRITE_ROUTINE
  	bool "Allow board control over console overwriting"
  	help
  	  If this is enabled, and the board-specific function
  	  overwrite_console() returns 1, the stdin, stderr and stdout are
  	  switched to the serial port, else the settings in the environment
  	  are used. If this is not enabled, the console will not be switched
  	  to serial.

  config SYS_CONSOLE_ENV_OVERWRITE
  	bool "Update environment variables during console init"
  	help
  	  The console environment variables (stdout, stdin, stderr) can be
  	  used to determine the correct console devices on start-up. This
  	  option writes the console devices to these variables on console
  	  start-up (after relocation). This causes the environment to be
  	  updated to match the console devices actually chosen.

  config SYS_CONSOLE_INFO_QUIET
  	bool "Don't display the console devices on boot"
  	help
  	  Normally U-Boot displays the current settings for stdout, stdin
  	  and stderr on boot when the post-relocation console is set up.

  	  Enable this option to suppress this output. It can be obtained by

  	  calling stdio_print_current_devices() from board code.

  config SYS_STDIO_DEREGISTER
  	bool "Allow deregistering stdio devices"
  	default y if USB_KEYBOARD
  	help
  	  Generally there is no need to deregister stdio devices since they
  	  are never deactivated. But if a stdio device is used which can be
  	  removed (for example a USB keyboard) then this option can be
  	  enabled to ensure this is handled correctly.

  endmenu

  menu "Logging"
  
  config LOG
  	bool "Enable logging support"

  	depends on DM

  	help
  	  This enables support for logging of status and debug messages. These
  	  can be displayed on the console, recorded in a memory buffer, or
  	  discarded if not needed. Logging supports various categories and
  	  levels of severity.
  
  config SPL_LOG
  	bool "Enable logging support in SPL"

  	depends on LOG
  	help
  	  This enables support for logging of status and debug messages. These
  	  can be displayed on the console, recorded in a memory buffer, or
  	  discarded if not needed. Logging supports various categories and
  	  levels of severity.
  
  config TPL_LOG
  	bool "Enable logging support in TPL"
  	depends on LOG

  	help
  	  This enables support for logging of status and debug messages. These
  	  can be displayed on the console, recorded in a memory buffer, or
  	  discarded if not needed. Logging supports various categories and
  	  levels of severity.
  
  config LOG_MAX_LEVEL
  	int "Maximum log level to record"
  	depends on LOG
  	default 5
  	help
  	  This selects the maximum log level that will be recorded. Any value
  	  higher than this will be ignored. If possible log statements below
  	  this level will be discarded at build time. Levels:

  	    0 - emergency
  	    1 - alert
  	    2 - critical
  	    3 - error
  	    4 - warning
  	    5 - note
  	    6 - info

  	    7 - debug

  	    8 - debug content
  	    9 - debug hardware I/O

  
  config SPL_LOG_MAX_LEVEL
  	int "Maximum log level to record in SPL"
  	depends on SPL_LOG
  	default 3
  	help
  	  This selects the maximum log level that will be recorded. Any value
  	  higher than this will be ignored. If possible log statements below
  	  this level will be discarded at build time. Levels:

  	    0 - emergency
  	    1 - alert
  	    2 - critical
  	    3 - error
  	    4 - warning
  	    5 - note
  	    6 - info

  	    7 - debug

  	    8 - debug content
  	    9 - debug hardware I/O

  config TPL_LOG_MAX_LEVEL
  	int "Maximum log level to record in TPL"
  	depends on TPL_LOG
  	default 3
  	help
  	  This selects the maximum log level that will be recorded. Any value
  	  higher than this will be ignored. If possible log statements below
  	  this level will be discarded at build time. Levels:

  	    0 - emergency
  	    1 - alert
  	    2 - critical
  	    3 - error
  	    4 - warning
  	    5 - note
  	    6 - info

  	    7 - debug

  	    8 - debug content
  	    9 - debug hardware I/O

  config LOG_DEFAULT_LEVEL
  	int "Default logging level to display"
  	default 6
  	help
  	  This is the default logging level set when U-Boot starts. It can
  	  be adjusted later using the 'log level' command. Note that setting

  	  this to a value above LOG_MAX_LEVEL will be ineffective, since the

  	  higher levels are not compiled in to U-Boot.
  
  	    0 - emergency
  	    1 - alert
  	    2 - critical
  	    3 - error
  	    4 - warning
  	    5 - note
  	    6 - info
  	    7 - debug
  	    8 - debug content
  	    9 - debug hardware I/O

  config LOG_CONSOLE
  	bool "Allow log output to the console"
  	depends on LOG
  	default y
  	help
  	  Enables a log driver which writes log records to the console.
  	  Generally the console is the serial port or LCD display. Only the
  	  log message is shown - other details like level, category, file and
  	  line number are omitted.

  config SPL_LOG_CONSOLE
  	bool "Allow log output to the console in SPL"
  	depends on SPL_LOG
  	default y
  	help
  	  Enables a log driver which writes log records to the console.
  	  Generally the console is the serial port or LCD display. Only the
  	  log message is shown - other details like level, category, file and
  	  line number are omitted.
  
  config TPL_LOG_CONSOLE

  	bool "Allow log output to the console in TPL"

  	depends on TPL_LOG

  	default y
  	help
  	  Enables a log driver which writes log records to the console.
  	  Generally the console is the serial port or LCD display. Only the
  	  log message is shown - other details like level, category, file and
  	  line number are omitted.

  config LOG_TEST
  	bool "Provide a test for logging"
  	depends on LOG
  	default y if SANDBOX
  	help
  	  This enables a 'log test' command to test logging. It is normally
  	  executed from a pytest and simply outputs logging information
  	  in various different ways to test that the logging system works

  	  correctly with various settings.

  config LOG_ERROR_RETURN
  	bool "Log all functions which return an error"
  	depends on LOG
  	help
  	  When an error is returned in U-Boot it is sometimes difficult to

  	  figure out the root cause. For example, reading from SPI flash may

  	  fail due to a problem in the SPI controller or due to the flash part
  	  not returning the expected information. This option changes
  	  log_ret() to log any errors it sees. With this option disabled,
  	  log_ret() is a nop.
  
  	  You can add log_ret() to all functions which return an error code.

  endmenu

  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 DEFAULT_FDT_FILE
  	string "Default fdt file"
  	help
  	  This option is used to set the default fdt file to boot OS.

  config MISC_INIT_R
  	bool "Execute Misc Init"
  	default y if ARCH_KEYSTONE || ARCH_SUNXI || MPC85xx
  	default y if ARCH_OMAP2PLUS && !AM33XX
  	help
  	  Enabling this option calls 'misc_init_r' function

  config VERSION_VARIABLE
  	bool "add U-Boot environment variable vers"
  	default n
  	help
  	  If this variable is defined, an environment variable
  	  named "ver" is created by U-Boot showing the U-Boot
  	  version as printed by the "version" command.
  	  Any change to this variable will be reverted at the
  	  next reset.

  config BOARD_LATE_INIT

  	bool "Execute Board late init"

  	help
  	  Sometimes board require some initialization code that might
  	  require once the actual init done, example saving board specific env,
  	  boot-modes etc. which eventually done at late.
  
  	  So this config enable the late init code with the help of board_late_init
  	  function which should defined on respective boards.

  config DISPLAY_CPUINFO
  	bool "Display information about the CPU during start up"

  	default y if ARC|| ARM || NIOS2 || X86 || XTENSA || M68K

  	help
  	  Display information about the CPU that U-Boot is running on
  	  when U-Boot starts up. The function print_cpuinfo() is called
  	  to do this.

  config DISPLAY_BOARDINFO

  	bool "Display information about the board during early start up"

  	default y if ARC || ARM || M68K || MIPS || PPC || SANDBOX || XTENSA

  	help
  	  Display information about the board that U-Boot is running on
  	  when U-Boot starts up. The board function checkboard() is called
  	  to do this.

  config DISPLAY_BOARDINFO_LATE
  	bool "Display information about the board during late start up"
  	help
  	  Display information about the board that U-Boot is running on after
  	  the relocation phase. The board function checkboard() is called to do
  	  this.

  config BOUNCE_BUFFER
  	bool "Include bounce buffer API"
  	help
  	  Some peripherals support DMA from a subset of physically
  	  addressable memory only.  To support such peripherals, the
  	  bounce buffer API uses a temporary buffer: it copies data
  	  to/from DMA regions while managing cache operations.
  
  	  A second possible use of bounce buffers is their ability to
  	  provide aligned buffers for DMA operations.

  config BOARD_TYPES
  	bool "Call get_board_type() to get and display the board type"
  	help
  	  If this option is enabled, checkboard() will call get_board_type()
  	  to get a string containing the board type and this will be
  	  displayed immediately after the model is shown on the console
  	  early in boot.

  menu "Start-up hooks"
  
  config ARCH_EARLY_INIT_R
  	bool "Call arch-specific init soon after relocation"

  	help
  	  With this option U-Boot will call arch_early_init_r() soon after
  	  relocation. Driver model is running by this point, and the cache
  	  is on. Note that board_early_init_r() is called first, if
  	  enabled. This can be used to set up architecture-specific devices.

  config ARCH_MISC_INIT
  	bool "Call arch-specific init after relocation, when console is ready"
  	help
  	  With this option U-Boot will call arch_misc_init() after
  	  relocation to allow miscellaneous arch-dependent initialisation
  	  to be performed. This function should be defined by the board

  	  and will be called after the console is set up, after relocation.

  config BOARD_EARLY_INIT_F
  	bool "Call board-specific init before relocation"

  	help
  	  Some boards need to perform initialisation as soon as possible
  	  after boot. With this option, U-Boot calls board_early_init_f()
  	  after driver model is ready in the pre-relocation init sequence.
  	  Note that the normal serial console is not yet set up, but the
  	  debug UART will be available if enabled.

  config BOARD_EARLY_INIT_R
  	bool "Call board-specific init after relocation"
  	help
  	  Some boards need to perform initialisation as directly after
  	  relocation. With this option, U-Boot calls board_early_init_r()
  	  in the post-relocation init sequence.

  config LAST_STAGE_INIT
  	bool "Call board-specific as last setup step"
  	help
  	  Some boards need to perform initialisation immediately before control
  	  is passed to the command-line interpreter (e.g. for initializations
  	  that depend on later phases in the init sequence). With this option,
  	  U-Boot calls last_stage_init() before the command-line interpreter is
  	  started.

  endmenu

  menu "Security support"
  
  config HASH
  	bool # "Support hashing API (SHA1, SHA256, etc.)"
  	help
  	  This provides a way to hash data in memory using various supported
  	  algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
  	  and the algorithms it supports are defined in common/hash.c. See
  	  also CMD_HASH for command-line access.

  config AVB_VERIFY
  	bool "Build Android Verified Boot operations"
  	depends on LIBAVB && FASTBOOT

  	depends on PARTITION_UUIDS

  	help
  	  This option enables compilation of bootloader-dependent operations,
  	  used by Android Verified Boot 2.0 library (libavb). Includes:
  	    * Helpers to process strings in order to build OS bootargs.
  	    * Helpers to access MMC, similar to drivers/fastboot/fb_mmc.c.
  	    * Helpers to alloc/init/free avb ops.

  config SPL_HASH
  	bool # "Support hashing API (SHA1, SHA256, etc.)"
  	help
  	  This provides a way to hash data in memory using various supported
  	  algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
  	  and the algorithms it supports are defined in common/hash.c. See
  	  also CMD_HASH for command-line access.
  
  config TPL_HASH
  	bool # "Support hashing API (SHA1, SHA256, etc.)"
  	help
  	  This provides a way to hash data in memory using various supported
  	  algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
  	  and the algorithms it supports are defined in common/hash.c. See
  	  also CMD_HASH for command-line access.

  endmenu

  menu "Update support"
  
  config UPDATE_TFTP
  	bool "Auto-update using fitImage via TFTP"
  	depends on FIT
  	help
  	  This option allows performing update of NOR with data in fitImage
  	  sent via TFTP boot.
  
  config UPDATE_TFTP_CNT_MAX
  	int "The number of connection retries during auto-update"
  	default 0
  	depends on UPDATE_TFTP
  
  config UPDATE_TFTP_MSEC_MAX
  	int "Delay in mSec to wait for the TFTP server during auto-update"
  	default 100
  	depends on UPDATE_TFTP

  config ANDROID_AB
  	bool "Android A/B updates"
  	default n
  	help
  	  If enabled, adds support for the new Android A/B update model. This
  	  allows the bootloader to select which slot to boot from based on the
  	  information provided by userspace via the Android boot_ctrl HAL. This
  	  allows a bootloader to try a new version of the system but roll back
  	  to previous version if the new one didn't boot all the way.

  endmenu

  menu "Blob list"
  
  config BLOBLIST
  	bool "Support for a bloblist"
  	help
  	  This enables support for a bloblist in U-Boot, which can be passed
  	  from TPL to SPL to U-Boot proper (and potentially to Linux). The
  	  blob list supports multiple binary blobs of data, each with a tag,
  	  so that different U-Boot components can store data which can survive
  	  through to the next stage of the boot.
  
  config SPL_BLOBLIST
  	bool "Support for a bloblist in SPL"
  	depends on BLOBLIST
  	default y if SPL
  	help
  	  This enables a bloblist in SPL. If this is the first part of U-Boot
  	  to run, then the bloblist is set up in SPL and passed to U-Boot
  	  proper. If TPL also has a bloblist, then SPL uses the one from there.
  
  config TPL_BLOBLIST
  	bool "Support for a bloblist in TPL"
  	depends on BLOBLIST
  	default y if TPL
  	help
  	  This enables a bloblist in TPL. The bloblist is set up in TPL and
  	  passed to SPL and U-Boot proper.
  
  config BLOBLIST_SIZE
  	hex "Size of bloblist"
  	depends on BLOBLIST
  	default 0x400
  	help
  	  Sets the size of the bloblist in bytes. This must include all
  	  overhead (alignment, bloblist header, record header). The bloblist
  	  is set up in the first part of U-Boot to run (TPL, SPL or U-Boot
  	  proper), and this sane bloblist is used for subsequent stages.
  
  config BLOBLIST_ADDR
  	hex "Address of bloblist"
  	depends on BLOBLIST
  	default 0xe000 if SANDBOX
  	help
  	  Sets the address of the bloblist, set up by the first part of U-Boot
  	  which runs. Subsequent U-Boot stages typically use the same address.
  
  endmenu

  source "common/spl/Kconfig"