1 menu "Command line interface"
4 bool "Support U-Boot commands"
7 Enable U-Boot's command-line functions. This provides a means
8 to enter commands into U-Boot for a wide variety of purposes. It
9 also allows scripts (containing commands) to be executed.
10 Various commands and command categorys can be indivdually enabled.
11 Depending on the number of commands enabled, this can add
12 substantially to the size of U-Boot.
18 This option enables the "hush" shell (from Busybox) as command line
19 interpreter, thus enabling powerful command line syntax like
20 if...then...else...fi conditionals or `&&' and '||'
21 constructs ("shell scripts").
23 If disabled, you get the old, much simpler behaviour with a somewhat
24 smaller memory footprint.
26 config CMDLINE_EDITING
27 bool "Enable command line editing"
31 Enable editing and History functions for interactive command line
34 config CMDLINE_PS_SUPPORT
35 bool "Enable support for changing the command prompt string at run-time"
36 depends on HUSH_PARSER
38 Only static string in the prompt is supported so far. The string is
39 obtained from environment variables PS1 and PS2.
42 bool "Enable auto complete using TAB"
46 Enable auto completion of commands using TAB.
49 bool "Enable long help messages"
53 Defined when you want long help messages included
54 Do not set this option when short of memory.
58 default "Zynq> " if ARCH_ZYNQ
59 default "ZynqMP> " if ARCH_ZYNQMP
62 This string is displayed in the command line to the left of the
65 config SYS_PROMPT_HUSH_PS2
66 string "Hush shell secondary prompt"
67 depends on HUSH_PARSER
70 This defines the secondary prompt string, which is
71 printed when the command interpreter needs more input
72 to complete a command. Usually "> ".
75 int "Maximum number arguments accepted by commands"
79 int "Console input buffer size"
80 default 2048 if ARCH_TEGRA || ARCH_VERSAL || ARCH_ZYNQ || ARCH_ZYNQMP || \
81 RCAR_GEN3 || TARGET_SOCFPGA_SOC64
82 default 512 if ARCH_MX5 || ARCH_MX6 || ARCH_MX7 || FSL_LSCH2 || \
84 default 256 if M68K || PPC
88 int "Buffer size for console output"
89 default 1024 if ARCH_SUNXI
93 bool "Command execution tracer"
97 This option enables the possiblity to print all commands before
98 executing them and after all variables are evaluated (similar
99 to Bash's xtrace/'set -x' feature).
100 To enable the tracer a variable "xtrace" needs to be defined in
115 List and dump ACPI tables. ACPI (Advanced Configuration and Power
116 Interface) is used mostly on x86 for providing information to the
117 Operating System about devices in the system. The tables are set up
118 by the firmware, typically U-Boot but possibly an earlier firmware
119 module, if U-Boot is chain-loaded from something else. ACPI tables
120 can also include code, to perform hardware-specific tasks required
121 by the Operating Systems. This allows some amount of separation
122 between the firmware and OS, and is particularly useful when you
123 want to make hardware changes without the OS needing to be adjusted.
130 List non-identity virtual-physical memory mappings for 32-bit CPUs.
143 Print ".config" contents.
145 If this option is enabled, the ".config" file contents are embedded
146 in the U-Boot image and can be printed on the console by the "config"
147 command. This provides information of which options are enabled on
154 Print console devices and information.
160 Print information about available CPUs. This normally shows the
161 number of CPUs, type (e.g. manufacturer, architecture, product or
162 internal name) and clock frequency. Other information may be
163 available depending on the CPU driver.
165 config CMD_FWU_METADATA
166 bool "fwu metadata read"
167 depends on FWU_MULTI_BANK_UPDATE
169 Command to read the metadata and dump it's contents
175 Print GPL license text
180 Provides access to the Intel Power-Management Controller (PMC) so
181 that its state can be examined. This does not currently support
182 changing the state but it is still useful for debugging and seeing
191 config CMD_TLV_EEPROM
193 depends on I2C_EEPROM
196 Display and program the system EEPROM data block in ONIE Tlvinfo
197 format. TLV stands for Type-Length-Value.
199 config SPL_CMD_TLV_EEPROM
200 bool "tlv_eeprom for SPL"
201 depends on SPL_I2C_EEPROM
202 select SPL_DRIVERS_MISC
205 Read system EEPROM data block in ONIE Tlvinfo format from SPL.
209 depends on RISCV_SMODE && SBI_V02
211 Display information about the SBI implementation.
221 Run the command stored in the environment "bootcmd", i.e.
222 "bootd" does the same thing as "run bootcmd".
228 Boot an application image from the memory.
230 config CMD_BOOTM_PRE_LOAD
231 bool "enable pre-load on bootm"
233 depends on IMAGE_PRE_LOAD
236 Enable support of stage pre-load for the bootm command.
237 This stage allow to check or modify the image provided
238 to the bootm command.
243 default y if BOOTSTD_FULL
245 Support listing available bootdevs (boot devices) which can provide an
246 OS to boot, as well as showing information about a particular one.
248 This command is not necessary for bootstd to work.
255 Support scanning for bootflows available with the bootdevs. The
256 bootflows can optionally be booted.
258 config CMD_BOOTFLOW_FULL
259 bool "bootflow - extract subcommands"
260 depends on BOOTSTD_FULL
261 default y if BOOTSTD_FULL
263 Add the ability to list the available bootflows, select one and obtain
264 information about it.
266 This command is not necessary for bootstd to work.
271 default y if BOOTSTD_FULL
273 Support listing available bootmethds (methods used to boot an
274 Operating System), as well as selecting the order that the bootmeths
277 This command is not necessary for bootstd to work.
280 bool "Support booting UEFI FIT images"
281 depends on CMD_BOOTEFI && CMD_BOOTM && FIT
284 Support booting UEFI FIT images via the bootm command.
289 Boot the Linux zImage
293 depends on ARM64 || RISCV
296 Boot an AArch64 Linux Kernel image from memory.
299 bool "Support booting Linux OS images"
300 depends on CMD_BOOTM || CMD_BOOTZ || CMD_BOOTI
303 Support booting the Linux kernel directly via a command such as bootm
307 bool "Support booting NetBSD (non-EFI) loader images"
311 Support booting NetBSD via the bootm command.
313 config BOOTM_OPENRTOS
314 bool "Support booting OPENRTOS / FreeRTOS images"
317 Support booting OPENRTOS / FreeRTOS via the bootm command.
320 bool "Support booting Enea OSE images"
321 depends on (ARM && (ARM64 || CPU_V7A || CPU_V7R) || SANDBOX || PPC || X86)
324 Support booting Enea OSE images via the bootm command.
327 bool "Support booting Plan9 OS images"
331 Support booting Plan9 images via the bootm command.
334 bool "Support booting RTEMS OS images"
338 Support booting RTEMS images via the bootm command.
341 bool "vbe - Verified Boot for Embedded"
342 depends on BOOTMETH_VBE
343 default y if BOOTSTD_FULL
345 Provides various subcommands related to VBE, such as listing the
346 available methods, looking at the state and changing which method
347 is used to boot. Updating the parameters is not currently
351 bool "Support booting VxWorks OS images"
355 Support booting VxWorks images via the bootm command.
358 hex "Maximum size of a decompresed OS image"
359 depends on CMD_BOOTM || CMD_BOOTI || CMD_BOOTZ
360 default 0x4000000 if PPC || ARM64
361 default 0x1000000 if X86 || ARCH_MX6 || ARCH_MX7
364 This is the maximum size of the buffer that is used to decompress the OS
365 image in to, if passing a compressed image to bootm/booti/bootz.
369 depends on EFI_LOADER
372 Boot an EFI image from memory.
374 config CMD_BOOTEFI_HELLO_COMPILE
375 bool "Compile a standard EFI hello world binary for testing"
376 depends on CMD_BOOTEFI && !CPU_V7M
379 This compiles a standard EFI hello world application with U-Boot so
380 that it can be used with the test/py testing framework. This is useful
381 for testing that EFI is working at a basic level, and for bringing
382 up EFI support on a new architecture.
384 No additional space will be required in the resulting U-Boot binary
385 when this option is enabled.
387 config CMD_BOOTEFI_HELLO
388 bool "Allow booting a standard EFI hello world for testing"
389 depends on CMD_BOOTEFI_HELLO_COMPILE
390 default y if CMD_BOOTEFI_SELFTEST
392 This adds a standard EFI hello world application to U-Boot so that
393 it can be used with the 'bootefi hello' command. This is useful
394 for testing that EFI is working at a basic level, and for bringing
395 up EFI support on a new architecture.
397 source lib/efi_selftest/Kconfig
404 Add an ANSI terminal boot menu command.
409 Android DTB/DTBO image manipulation commands. Read dtb/dtbo files from
410 image into RAM, dump image structure information, etc. Those dtb/dtbo
411 files should be merged in one dtb further, which needs to be passed to
412 the kernel, as part of a boot process.
416 depends on ANDROID_BOOT_IMAGE
418 Android Boot Image manipulation commands. Allows one to extract
419 images contained in boot.img, like kernel, ramdisk, dtb, etc, and
420 obtain corresponding meta-information from boot.img.
422 See doc/android/boot-image.rst for details.
425 bool "bootelf, bootvx"
429 Boot an ELF/vxWorks image from the memory.
432 bool "Flattened Device Tree utility commands"
436 Do FDT related setup before booting into the Operating System.
438 config SUPPORT_EXTENSION_SCAN
442 bool "Extension board management command"
444 depends on SUPPORT_EXTENSION_SCAN
446 Enables the "extension" command, which allows to detect
447 extension boards connected to the system, and apply
448 corresponding Device Tree overlays.
454 Start an application at a given address.
460 Run the command in the given environment variable.
466 Print header information for application image.
471 List all images found in flash
477 Extract a part of a multi-image.
482 Print file as hexdump to standard output
485 bool "spl export - Export boot information for Falcon boot"
488 Falcon mode allows booting directly from SPL into an Operating
489 System such as Linux, thus skipping U-Boot proper. See
490 doc/README.falcon for full information about how to use this
493 config CMD_SPL_NAND_OFS
494 hex "Offset of OS args or dtb for Falcon-mode NAND boot"
495 depends on CMD_SPL && (TPL_NAND_SUPPORT || SPL_NAND_SUPPORT)
498 This provides the offset of the command line arguments for Linux
499 when booting from NAND in Falcon mode. See doc/README.falcon
500 for full information about how to use this option (and also see
501 board/gateworks/gw_ventana/README for an example).
503 config CMD_SPL_NOR_OFS
504 hex "Offset of OS args or dtb for Falcon-mode NOR boot"
505 depends on CMD_SPL && SPL_NOR_SUPPORT
508 This provides the offset of the command line arguments or dtb for
509 Linux when booting from NOR in Falcon mode.
511 config CMD_SPL_WRITE_SIZE
512 hex "Size of argument area"
516 This provides the size of the command-line argument area in NAND
517 flash used by Falcon-mode boot. See the documentation until CMD_SPL
520 config CMD_THOR_DOWNLOAD
521 bool "thor - TIZEN 'thor' download"
524 Implements the 'thor' download protocol. This is a way of
525 downloading a software update over USB from an attached host.
526 There is no documentation about this within the U-Boot source code
527 but you should be able to find something on the interwebs.
529 config THOR_RESET_OFF
530 bool "thor: Disable reset on completion"
531 depends on CMD_THOR_DOWNLOAD
534 bool "zboot - x86 boot command"
536 With x86 machines it is common to boot a bzImage file which
537 contains both a kernel and a setup.bin file. The latter includes
538 configuration information from the dark ages which x86 boards still
539 need to pick things out of.
541 Consider using FIT in preference to this since it supports directly
542 booting both 32- and 64-bit kernels, as well as secure boot.
543 Documentation is available in doc/uImage.FIT/x86-fit-boot.txt
547 menu "Environment commands"
550 bool "ask for env variable"
552 Ask for environment variable
570 Edit environment variable.
575 Allow for searching environment variables
581 Save all environment variables into the compiled-in persistent
586 depends on CMD_SAVEENV
588 Erase environment variables from the compiled-in persistent
591 config CMD_ENV_EXISTS
595 Check if a variable is defined in the environment for use in
598 config CMD_ENV_CALLBACK
599 bool "env callbacks - print callbacks and their associated variables"
601 Some environment variable have callbacks defined by
602 U_BOOT_ENV_CALLBACK. These are called when the variable changes.
603 For example changing "baudrate" adjust the serial baud rate. This
604 command lists the currently defined callbacks.
607 bool "env flags -print variables that have non-default flags"
609 Some environment variables have special flags that control their
610 behaviour. For example, serial# can only be written once and cannot
611 be deleted. This command shows the variables that have special
614 config CMD_NVEDIT_EFI
615 bool "env [set|print] -e - set/print UEFI variables"
616 depends on EFI_LOADER
619 UEFI variables are encoded as some form of U-Boot variables.
620 If enabled, we are allowed to set/print UEFI variables using
621 "env" command with "-e" option without knowing details.
623 config CMD_NVEDIT_INDIRECT
624 bool "env indirect - Sets environment value from another"
626 config CMD_NVEDIT_INFO
627 bool "env info - print or evaluate environment information"
629 Print environment information:
630 - env_valid : is environment valid
631 - env_ready : is environment imported into hash table
632 - env_use_default : is default environment used
634 This command can be optionally used for evaluation in scripts:
635 [-d] : evaluate whether default environment is used
636 [-p] : evaluate whether environment can be persisted
638 The result of multiple evaluations will be combined with AND.
640 config CMD_NVEDIT_LOAD
643 Load all environment variables from the compiled-in persistent
646 config CMD_NVEDIT_SELECT
649 Select the compiled-in persistent storage of environment variables.
653 menu "Memory commands"
658 Compute binary operations (xor, or, and) of byte arrays of arbitrary
659 size from memory and store the result in memory or the environment.
663 default y if BLOBLIST
665 Show information about the bloblist, a collection of binary blobs
666 held in memory that persist between SPL and U-Boot. In the case of
667 x86 devices the bloblist can be used to hold ACPI tables so that they
668 remain available in memory.
681 Add -v option to verify data against a crc32 checksum.
684 bool "eeprom - EEPROM subsystem"
686 (deprecated, needs conversion to driver model)
687 Provides commands to read and write EEPROM (Electrically Erasable
688 Programmable Read Only Memory) chips that are connected over an
691 config CMD_EEPROM_LAYOUT
692 bool "Enable layout-aware eeprom commands"
693 depends on CMD_EEPROM
695 (deprecated, needs conversion to driver model)
696 When enabled, additional eeprom sub-commands become available.
698 eeprom print - prints the contents of the eeprom in a human-readable
699 way (eeprom layout fields, and data formatted to be fit for human
702 eeprom update - allows user to update eeprom fields by specifying
703 the field name, and providing the new data in a human readable format
704 (same format as displayed by the eeprom print command).
706 Both commands can either auto detect the layout, or be told which
710 __weak int parse_layout_version(char *str)
711 - override to provide your own layout name parsing
712 __weak void __eeprom_layout_assign(struct eeprom_layout *layout,
714 - override to setup the layout metadata based on the version
715 __weak int eeprom_layout_detect(unsigned char *data)
716 - override to provide your own algorithm for detecting layout
719 - contains various printing and updating functions for common
720 types of eeprom fields. Can be used for defining
723 config EEPROM_LAYOUT_HELP_STRING
724 string "Tells user what layout names are supported"
725 depends on CMD_EEPROM_LAYOUT
726 default "<not defined>"
728 Help printed with the LAYOUT VERSIONS part of the 'eeprom'
731 config SYS_I2C_EEPROM_BUS
732 int "I2C bus of the EEPROM device."
733 depends on CMD_EEPROM
736 config SYS_I2C_EEPROM_ADDR_LEN
737 int "Length in bytes of the EEPROM memory array address"
738 depends on CMD_EEPROM || ID_EEPROM
742 Note: This is NOT the chip address length!
744 config SYS_EEPROM_SIZE
745 depends on CMD_EEPROM
746 int "Size in bytes of the EEPROM device"
749 config SYS_EEPROM_PAGE_WRITE_BITS
750 int "Number of bits used to address bytes in a single page"
751 depends on CMD_EEPROM
754 The EEPROM page size is 2^SYS_EEPROM_PAGE_WRITE_BITS.
755 A 64 byte page, for example would require six bits.
757 config SYS_EEPROM_PAGE_WRITE_DELAY_MS
758 int "Number of milliseconds to delay between page writes"
759 depends on CMD_EEPROM || CMD_I2C
765 Infinite write loop on address range
771 Compute MD5 checksum.
775 depends on CMD_MD5SUM
777 Add -v option to verify data against an MD5 checksum.
782 Display memory information.
785 bool "md, mm, nm, mw, cp, cmp, base, loop"
790 mm - memory modify (auto-incrementing address)
791 nm - memory modify (constant address)
792 mw - memory write (fill)
795 base - print or set address offset
796 loop - initialize loop on address range
798 config CMD_MEM_SEARCH
799 bool "ms - Memory search"
801 Memory-search command
803 This allows searching through a region of memory looking for hex
804 data (byte, 16-bit word, 32-bit long, also 64-bit on machines that
805 support it). It is also possible to search for a string. The
806 command accepts a memory range and a list of values to search for.
807 The values need to appear in memory in the same order they are given
808 in the command. At most 10 matches can be returned at a time, but
809 pressing return will show the next 10 matches. Environment variables
810 are set for use with scripting (memmatches, memaddr, mempos).
813 bool "Enable cyclic md/mw commands"
814 depends on CMD_MEMORY
816 Add the "mdc" and "mwc" memory commands. These are cyclic
821 This command will print 4 bytes (10,11,12,13) each 500 ms.
823 => mwc.l 100 12345678 10
824 This command will write 12345678 to address 100 all 10 ms.
829 depends on CMD_MEMORY && (LIB_RAND || LIB_HW_RAND)
831 random - fill memory with random data
836 Simple RAM read/write test.
840 config SYS_ALT_MEMTEST
841 bool "Alternative test"
843 Use a more complete alternative memory test.
847 config SYS_ALT_MEMTEST_BITFLIP
851 The alternative memory test includes bitflip test since 2020.07.
852 The bitflip test significantly increases the overall test time.
853 Bitflip test can optionally be disabled here.
857 config SYS_MEMTEST_START
858 hex "default start address for mtest"
861 This is the default start address for mtest for simple read/write
862 test. If no arguments are given to mtest, default address is used
865 config SYS_MEMTEST_END
866 hex "default end address for mtest"
869 This is the default end address for mtest for simple read/write
870 test. If no arguments are given to mtest, default address is used
879 Compute SHA1 checksum.
881 config SHA1SUM_VERIFY
883 depends on CMD_SHA1SUM
885 Add -v option to verify data against a SHA1 checksum.
888 bool "strings - display strings in memory"
890 This works similarly to the Unix 'strings' command except that it
891 works with a memory range. String of printable characters found
892 within the range are displayed. The minimum number of characters
893 for a sequence to be considered a string can be provided.
897 menu "Compression commands"
901 default y if CMD_BOOTI
904 Support decompressing an LZMA (Lempel-Ziv-Markov chain algorithm)
909 default y if CMD_BOOTI
912 Support decompressing an LZ4 image from memory region.
916 default y if CMD_BOOTI
919 Uncompress a zip-compressed memory region.
923 select GZIP_COMPRESSED
925 Compress a memory region with zlib deflate method.
929 menu "Device access commands"
932 #depends on FLASH_CFI_DRIVER
935 ARM Ltd reference designs flash partition access
938 bool "adc - Access Analog to Digital Converters info and data"
940 depends on DM_REGULATOR
942 Shows ADC device info and permit printing one-shot analog converted
943 data from a named Analog to Digital Converter.
948 depends on PARTITIONS
950 Read/modify/write the fields of Bootloader Control Block, usually
951 stored on the flash "misc" partition with its structure defined in:
952 https://android.googlesource.com/platform/bootable/recovery/+/master/
953 bootloader_message/include/bootloader_message/bootloader_message.h
955 Some real-life use-cases include (but are not limited to):
956 - Determine the "boot reason" (and act accordingly):
957 https://source.android.com/devices/bootloader/boot-reason
958 - Get/pass a list of commands from/to recovery:
959 https://android.googlesource.com/platform/bootable/recovery
960 - Inspect/dump the contents of the BCB fields
963 bool "bind/unbind - Bind or unbind a device to/from a driver"
966 Bind or unbind a device to/from a driver from the command line.
967 This is useful in situations where a device may be handled by several
968 drivers. For example, this can be used to bind a UDC to the usb ether
969 gadget driver from the command line.
972 bool "clk - Show clock frequencies"
975 Shows clock frequences by calling a sock_clk_dump() hook function.
976 This is depreated in favour of using the CLK uclass and accessing
977 clock values from associated drivers. However currently no command
981 bool "demo - Demonstration commands for driver model"
984 Provides a 'demo' command which can be used to play around with
985 driver model. To use this properly you will need to enable one or
986 both of the demo devices (DM_DEMO_SHAPE and DM_DEMO_SIMPLE).
987 Otherwise you will always get an empty list of devices. The demo
988 devices are defined in the sandbox device tree, so the easiest
989 option is to use sandbox and pass the -d point to sandbox's
996 Enables the command "dfu" which is used to have U-Boot create a DFU
997 class device via USB. This command requires that the "dfu_alt_info"
998 environment variable be set and define the alt settings to expose to
1002 bool "dm - Access to driver model information"
1005 Provides access to driver model data structures and information,
1006 such as a list of devices, list of uclasses and the state of each
1007 device (e.g. activated). This is not required for operation, but
1008 can be useful to see the state of driver model for debugging or
1012 bool "fastboot - Android fastboot support"
1015 This enables the command "fastboot" which enables the Android
1016 fastboot mode for the platform. Fastboot is a protocol for
1017 downloading images, flashing and device control used on
1018 Android devices. Fastboot requires either the network stack
1019 enabled or support for acting as a USB device.
1021 See doc/android/fastboot.rst for more information.
1024 bool "flinfo, erase, protect"
1026 depends on MTD || FLASH_CFI_DRIVER || MTD_NOR_FLASH
1029 flinfo - print FLASH memory information
1030 erase - FLASH memory
1031 protect - enable or disable FLASH write protection
1040 config CMD_FPGA_LOADBP
1041 bool "fpga loadbp - load partial bitstream (Xilinx only)"
1044 Supports loading an FPGA device from a bitstream buffer containing
1045 a partial bitstream.
1047 config CMD_FPGA_LOADFS
1048 bool "fpga loadfs - load bitstream from FAT filesystem (Xilinx only)"
1051 Supports loading an FPGA device from a FAT filesystem.
1053 config CMD_FPGA_LOADMK
1054 bool "fpga loadmk - load bitstream from image"
1057 Supports loading an FPGA device from a image generated by mkimage.
1059 config CMD_FPGA_LOADP
1060 bool "fpga loadp - load partial bitstream"
1063 Supports loading an FPGA device from a bitstream buffer containing
1064 a partial bitstream.
1066 config CMD_FPGA_LOAD_SECURE
1067 bool "fpga loads - loads secure bitstreams"
1069 select FPGA_LOAD_SECURE
1071 Enables the fpga loads command which is used to load secure
1072 (authenticated or encrypted or both) bitstreams on to FPGA.
1075 bool "fpgad - dump FPGA registers"
1077 (legacy, needs conversion to driver model)
1078 Provides a way to dump FPGA registers by calling the board-specific
1079 fpga_get_reg() function. This functions similarly to the 'md'
1083 bool "fuse - support for the fuse subssystem"
1085 (deprecated - needs conversion to driver model)
1086 This allows reading, sensing, programming or overriding fuses
1087 which control the behaviour of the device. The command uses the
1095 config CMD_GPIO_READ
1096 bool "gpio read - save GPIO value to variable"
1099 Enables the 'gpio read' command that saves the value
1100 of a GPIO pin to a variable.
1106 Control PWM channels, this allows invert/config/enable/disable PWM channels.
1109 bool "GPT (GUID Partition Table) command"
1110 select EFI_PARTITION
1111 select PARTITION_UUIDS
1114 Enable the 'gpt' command to ready and write GPT style partition
1118 bool "GPT Random UUID generation"
1121 Enable the generation of partitions with random UUIDs if none
1124 config CMD_GPT_RENAME
1125 bool "GPT partition renaming commands"
1128 Enables the 'gpt' command to interchange names on two GPT
1129 partitions via the 'gpt swap' command or to rename single
1130 partitions via the 'rename' command.
1133 bool "ide - Support for IDE drivers"
1136 Provides an 'ide' command which allows accessing the IDE drive,
1137 resetting the IDE interface, printing the partition table and
1138 geting device info. It also enables the 'diskboot' command which
1139 permits booting from an IDE drive.
1142 bool "io - Support for performing I/O accesses"
1144 Provides an 'iod' command to display I/O space and an 'iow' command
1145 to write values to the I/O space. This can be useful for manually
1146 checking the state of devices during boot when debugging device
1150 bool "iotrace - Support for tracing I/O activity"
1152 Provides an 'iotrace' command which supports recording I/O reads and
1153 writes in a trace buffer in memory . It also maintains a checksum
1154 of the trace records (even if space is exhausted) so that the
1155 sequence of I/O accesses can be verified.
1157 When debugging drivers it is useful to see what I/O accesses were
1158 done and in what order.
1160 Even if the individual accesses are of little interest it can be
1161 useful to verify that the access pattern is consistent each time
1162 an operation is performed. In this case a checksum can be used to
1163 characterise the operation of a driver. The checksum can be compared
1164 across different runs of the operation to verify that the driver is
1167 In particular, when performing major refactoring of the driver, where
1168 the access pattern should not change, the checksum provides assurance
1169 that the refactoring work has not broken the driver.
1171 This works by sneaking into the io.h heder for an architecture and
1172 redirecting I/O accesses through iotrace's tracing mechanism.
1174 For now no commands are provided to examine the trace buffer. The
1175 format is fairly simple, so 'md' is a reasonable substitute.
1177 Note: The checksum feature is only useful for I/O regions where the
1178 contents do not change outside of software control. Where this is not
1179 suitable you can fall back to manually comparing the addresses. It
1180 might be useful to enhance tracing to only checksum the accesses and
1181 not the data read/written.
1191 bool "w1 - Support for Dallas 1-Wire protocol"
1193 Dallas 1-wire protocol support
1199 Load a binary file over serial line.
1204 Load a binary over memory mapped.
1207 bool "loads - Load a file over serial in S-Record format"
1210 Load an S-Record file over serial line
1213 bool "Echo all characters received during a loads back to console"
1214 depends on CMD_LOADS
1216 If enabled, all characters received during a serial download (using
1217 the "loads" command) are echoed back. This might be needed by some
1218 terminal emulations (like "cu"), but may as well just take time on
1219 others. This sets the initial value of the "loads_echo" environment
1223 bool "saves - Save a file over serial in S-Record format"
1225 Provides a way to save a binary file using the Motorola S-Record
1226 format over the serial line.
1228 config SYS_LOADS_BAUD_CHANGE
1229 bool "Enable a temporary baudrate change during loads/saves command"
1230 depends on CMD_LOADS || CMD_SAVES
1232 config CMD_LOADXY_TIMEOUT
1233 int "loadxy_timeout"
1237 Initial timeout for loadx and loady commands. Zero means infinity.
1241 bool "lsblk - list block drivers and devices"
1243 Print list of available block device drivers, and for each, the list
1244 of known block devices.
1247 bool "MBR (Master Boot Record) command"
1248 select DOS_PARTITION
1250 Enable the 'mbr' command to ready and write MBR (Master Boot Record)
1251 style partition tables.
1257 Enable the command "misc" for accessing miscellaneous devices with
1258 a MISC uclass driver. The command provides listing all MISC devices
1259 as well as read and write functionalities via their drivers.
1265 MMC memory mapped support.
1269 config CMD_BKOPS_ENABLE
1270 bool "mmc bkops enable"
1273 Enable command for setting manual background operations handshake
1274 on a eMMC device. The feature is optionally available on eMMC devices
1275 conforming to standard >= 4.41.
1278 bool "Enable support for RPMB in the mmc command"
1279 depends on SUPPORT_EMMC_RPMB
1281 Enable the commands for reading, writing and programming the
1282 key for the Replay Protection Memory Block partition in eMMC.
1284 config CMD_MMC_SWRITE
1286 depends on MMC_WRITE
1289 Enable support for the "mmc swrite" command to write Android sparse
1298 Enable storage cloning over block devices, useful for
1299 initial flashing by external block device without network
1302 config CMD_OPTEE_RPMB
1303 bool "Enable read/write support on RPMB via OPTEE"
1304 depends on SUPPORT_EMMC_RPMB && OPTEE
1306 Enable the commands for reading, writing persistent named values
1307 in the Replay Protection Memory Block partition in eMMC by
1308 using Persistent Objects in OPTEE
1313 select MTD_PARTITIONS
1315 MTD commands support.
1319 depends on MULTIPLEXER
1321 List, select, and deselect mux controllers on the fly.
1325 default y if NAND_SUNXI
1326 depends on MTD_RAW_NAND
1331 config CMD_NAND_TRIMFFS
1332 bool "nand write.trimffs"
1333 default y if ARCH_SUNXI
1335 Allows one to skip empty pages when flashing something on a NAND.
1337 config CMD_NAND_LOCK_UNLOCK
1338 bool "nand lock/unlock"
1340 NAND locking support.
1342 config CMD_NAND_TORTURE
1345 NAND torture support.
1354 NVM Express device support
1357 bool "onenand - access to onenand device"
1360 OneNAND is a brand of NAND ('Not AND' gate) flash which provides
1361 various useful features. This command allows reading, writing,
1362 and erasing blocks. It allso provides a way to show and change
1363 bad blocks, and test the device.
1365 config USE_ONENAND_BOARD_INIT
1366 bool "Call onenand_board_init() in the onenand command"
1367 depends on CMD_ONENAND
1372 Enable the 'osd' command which allows to query information from and
1373 write text data to a on-screen display (OSD) device; a virtual device
1374 associated with a display capable of displaying a text overlay on the
1375 display it's associated with..
1379 depends on PARTITIONS
1380 select PARTITION_UUIDS
1382 Read and display information about the partition table on
1386 bool "pci - Access PCI devices"
1388 Provide access to PCI (Peripheral Interconnect Bus), a type of bus
1389 used on some devices to allow the CPU to communicate with its
1390 peripherals. Sub-commands allow bus enumeration, displaying and
1391 changing configuration space and a few other features.
1394 bool "pinmux - show pins muxing"
1396 default y if PINCTRL
1398 Parse all available pin-controllers and show pins muxing. This
1399 is useful for debug purpoer to check the pin muxing and to know if
1400 a pin is configured as a GPIO or as an alternate function.
1405 Poweroff/Shutdown the system
1408 bool "read - Read binary data from a partition"
1410 Provides low-level access to the data in a partition.
1412 config CMD_REMOTEPROC
1414 depends on REMOTEPROC
1416 Support for Remote Processor control
1419 bool "sata - Access SATA subsystem"
1422 SATA (Serial Advanced Technology Attachment) is a serial bus
1423 standard for connecting to hard drives and other storage devices.
1424 This command provides information about attached devices and allows
1425 reading, writing and other operations.
1427 SATA replaces PATA (originally just ATA), which stands for Parallel AT
1428 Attachment, where AT refers to an IBM AT (Advanced Technology)
1429 computer released in 1984.
1432 bool "scsi - Access to SCSI devices"
1435 This provides a 'scsi' command which provides access to SCSI (Small
1436 Computer System Interface) devices. The command provides a way to
1437 scan the bus, reset the bus, read and write data and get information
1441 bool "sdram - Print SDRAM configuration information"
1443 Provides information about attached SDRAM. This assumed that the
1444 SDRAM has an EEPROM with information that can be read using the
1445 I2C bus. This is only available on some boards.
1449 depends on DM_SPI_FLASH || SPI_FLASH
1450 default y if DM_SPI_FLASH
1455 bool "sf test - Allow testing of SPI flash"
1458 Provides a way to test that SPI flash is working correctly. The
1459 test is destructive, in that an area of SPI flash must be provided
1460 for the test to use. Performance information is also provided,
1461 measuring the performance of reading, writing and erasing in
1462 Mbps (Million Bits Per Second). This value should approximately
1463 equal the SPI bus speed for a single-bit-wide SPI bus, assuming
1464 everything is working properly.
1467 bool "sspi - Command to access spi device"
1470 SPI utility command.
1472 config DEFAULT_SPI_BUS
1473 int "default spi bus used by sspi command"
1477 config DEFAULT_SPI_MODE
1478 hex "default spi mode used by sspi command (see include/spi.h)"
1482 config CMD_TEMPERATURE
1483 bool "temperature - display the temperature from thermal sensors"
1484 depends on DM_THERMAL
1486 Provides a way to list thermal sensors and to get their readings.
1489 bool "tsi148 - Command to access tsi148 device"
1491 This provides various sub-commands to initialise and configure the
1492 Turndra tsi148 device. See the command help for full details.
1495 bool "Enable UFS - Universal Flash Subsystem commands"
1498 "This provides commands to initialise and configure universal flash
1502 bool "universe - Command to set up the Turndra Universe controller"
1504 This allows setting up the VMEbus provided by this controller.
1505 See the command help for full details.
1515 select USB_FUNCTION_SDP
1517 Enables the command "sdp" which is used to have U-Boot emulating the
1518 Serial Download Protocol (SDP) via USB.
1522 depends on USB_FUNCTION_ROCKUSB
1524 Rockusb protocol is widely used by Rockchip SoC based devices. It can
1525 read/write info, image to/from devices. This enable rockusb command
1526 support to communication with rockusb device. for more detail about
1527 this command, please read doc/README.rockusb.
1529 config CMD_USB_MASS_STORAGE
1530 bool "UMS usb mass storage"
1531 depends on USB_GADGET_DOWNLOAD
1532 select USB_FUNCTION_MASS_STORAGE
1533 depends on BLK && USB_GADGET
1535 Enables the command "ums" and the USB mass storage support to the
1536 export a block device: U-Boot, the USB device, acts as a simple
1537 external hard drive plugged on the host USB port.
1540 bool "Xen para-virtualized block device"
1544 Xen para-virtualized block device support
1551 VirtIO block device support
1557 This provides commands to control the watchdog timer devices.
1563 Enable the command "axi" for accessing AXI (Advanced eXtensible
1564 Interface) busses, a on-chip interconnect specification for managing
1565 functional blocks in SoC designs, which is also often used in designs
1566 involving FPGAs (e.g. communication with IP cores in Xilinx FPGAs).
1570 menu "Shell scripting commands"
1575 Print file to standard output
1581 Echo args to console
1587 Return true/false on integer compare.
1593 Run script from memory
1599 Evaluate boolean and math expressions and store the result in an env
1601 Also supports loading the value at a memory location into a variable.
1602 If CONFIG_REGEX is enabled, setexpr also supports a gsub function.
1604 config CMD_SETEXPR_FMT
1606 depends on CMD_SETEXPR
1608 Evaluate format string expression and store result in an environment
1613 menu "Android support commands"
1615 config CMD_AB_SELECT
1617 depends on ANDROID_AB
1619 On Android devices with more than one boot slot (multiple copies of
1620 the kernel and system images) this provides a command to select which
1621 slot should be used to boot from and register the boot attempt. This
1622 is used by the new A/B update model where one slot is updated in the
1623 background while running from the other slot.
1630 bool "Network commands"
1640 bootp - boot image via network using BOOTP/TFTP protocol
1644 depends on CMD_BOOTP
1646 Boot image via network using DHCP/TFTP protocol
1648 config BOOTP_MAY_FAIL
1649 bool "Allow for the BOOTP/DHCP server to not be found"
1650 depends on CMD_BOOTP
1652 If the DHCP server is not found after the configured retry count, the
1653 call will fail instead of starting over. This can be used to fail
1654 over to Link-local IP address configuration if the DHCP server is not
1657 config BOOTP_BOOTPATH
1658 bool "Request & store 'rootpath' from BOOTP/DHCP server"
1660 depends on CMD_BOOTP
1662 Even though the config is called BOOTP_BOOTPATH, it stores the
1663 path in the variable 'rootpath'.
1665 config BOOTP_VENDOREX
1666 bool "Support vendor extensions from BOOTP/DHCP server"
1667 depends on CMD_BOOTP
1669 config BOOTP_BOOTFILESIZE
1670 bool "Request & store 'bootfilesize' from BOOTP/DHCP server"
1671 depends on CMD_BOOTP
1674 bool "Request & store 'dnsip' from BOOTP/DHCP server"
1676 depends on CMD_BOOTP
1678 The primary DNS server is stored as 'dnsip'. If two servers are
1679 returned, you must set BOOTP_DNS2 to store that second server IP
1683 bool "Store 'dnsip2' from BOOTP/DHCP server"
1684 depends on BOOTP_DNS
1686 If a DHCP client requests the DNS server IP from a DHCP server,
1687 it is possible that more than one DNS serverip is offered to the
1688 client. If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS
1689 server IP will be stored in the additional environment
1690 variable "dnsip2". The first DNS serverip is always
1691 stored in the variable "dnsip", when BOOTP_DNS is defined.
1693 config BOOTP_GATEWAY
1694 bool "Request & store 'gatewayip' from BOOTP/DHCP server"
1696 depends on CMD_BOOTP
1698 config BOOTP_HOSTNAME
1699 bool "Request & store 'hostname' from BOOTP/DHCP server"
1701 depends on CMD_BOOTP
1703 The name may or may not be qualified with the local domain name.
1705 config BOOTP_PREFER_SERVERIP
1706 bool "serverip variable takes precedent over DHCP server IP."
1707 depends on CMD_BOOTP
1709 By default a BOOTP/DHCP reply will overwrite the 'serverip' variable.
1711 With this option enabled, the 'serverip' variable in the environment
1712 takes precedence over DHCP server IP and will only be set by the DHCP
1713 server if not already set in the environment.
1715 config BOOTP_SUBNETMASK
1716 bool "Request & store 'netmask' from BOOTP/DHCP server"
1718 depends on CMD_BOOTP
1720 config BOOTP_NISDOMAIN
1721 bool "Request & store 'nisdomain' from BOOTP/DHCP server"
1722 depends on CMD_BOOTP
1724 config BOOTP_NTPSERVER
1725 bool "Request & store 'ntpserverip' from BOOTP/DHCP server"
1726 depends on CMD_BOOTP
1728 config BOOTP_TIMEOFFSET
1729 bool "Request & store 'timeoffset' from BOOTP/DHCP server"
1730 depends on CMD_BOOTP && CMD_SNTP
1735 Selecting this will allow capturing all Ethernet packets and store
1736 them in physical memory in a PCAP formated file,
1737 later to be analyzed by PCAP reader application (IE. WireShark).
1740 bool "Send PXE client arch to BOOTP/DHCP server"
1742 depends on CMD_BOOTP && CMD_PXE
1744 Supported for ARM, ARM64, and x86 for now.
1746 config BOOTP_PXE_CLIENTARCH
1748 depends on BOOTP_PXE
1749 default 0x16 if ARM64
1753 config BOOTP_VCI_STRING
1755 depends on CMD_BOOTP
1756 default "U-Boot.armv7" if CPU_V7A || CPU_V7M || CPU_V7R
1757 default "U-Boot.armv8" if ARM64
1758 default "U-Boot.arm" if ARM
1765 tftpboot - load file via network using TFTP protocol
1769 depends on CMD_TFTPBOOT
1771 TFTP put command, for uploading files to a server
1775 depends on CMD_TFTPBOOT
1777 Act as a TFTP server and boot the first received file
1779 config NET_TFTP_VARS
1780 bool "Control TFTP timeout and count through environment"
1781 depends on CMD_TFTPBOOT
1784 If set, allows controlling the TFTP timeout through the
1785 environment variable tftptimeout, and the TFTP maximum
1786 timeout count through the variable tftptimeoutcountmax.
1787 If unset, timeout and maximum are hard-defined as 1 second
1788 and 10 timouts per TFTP transfer.
1793 Boot image via network using RARP/TFTP protocol
1799 Boot image via network using NFS protocol.
1802 int "Timeout in milliseconds for NFS mounts"
1806 Timeout in milliseconds used in NFS protocol. If you encounter
1807 "ERROR: Cannot umount" in nfs command, try longer timeout such as
1810 config SYS_DISABLE_AUTOLOAD
1811 bool "Disable automatically loading files over the network"
1812 depends on CMD_BOOTP || CMD_DHCP || CMD_NFS || CMD_RARP
1814 Typically, commands such as "dhcp" will attempt to automatically
1815 load a file from the network, once the initial network configuration
1816 is complete. Enable this option to disable this behavior and instead
1817 require files to be loaded over the network by subsequent commands.
1823 wget is a simple command to download kernel, or other files,
1824 from a http server over TCP.
1830 If set, allows 802.3(clause 22) MII Management functions interface access
1831 The management interface specified in Clause 22 provides
1832 a simple, two signal, serial interface to connect a
1833 Station Management entity and a managed PHY for providing access
1834 to management parameters and services.
1835 The interface is referred to as the MII management interface.
1838 bool "Call mii_init() in the mii command"
1839 depends on CMD_MII && (MPC8XX_FEC || FSLDMAFE || MCFFEC)
1845 If set, allows Enable 802.3(clause 45) MDIO interface registers access
1846 The MDIO interface is orthogonal to the MII interface and extends
1847 it by adding access to more registers through indirect addressing.
1852 Send ICMP ECHO_REQUEST to network host
1857 default y if (CMD_PING && IPV6)
1859 Send ICMPv6 ECHO_REQUEST to network host
1864 Perform CDP network configuration
1870 Synchronize RTC via network
1875 Lookup the IP of a hostname
1877 config CMD_LINK_LOCAL
1881 Acquire a network IP address using the link-local protocol
1887 Manually configure the attached NIC via NC-SI.
1888 Normally this happens automatically before other network
1896 Allow control of L2 Ethernet switch commands. These are supported
1897 by the vsc9953 Ethernet driver at present. Sub-commands allow
1898 operations such as enabling / disabling a port and
1899 viewing/maintaining the filtering database (FDB)
1905 Boot image via network using PXE protocol
1910 Wait for wake-on-lan Magic Packet
1914 menu "Misc commands"
1917 bool "Enable 'bmp' command"
1920 This provides a way to obtain information about a BMP-format image
1921 and to display it. BMP (which presumably stands for BitMaP) is a
1922 file format defined by Microsoft which supports images of various
1923 depths, formats and compression methods. Headers on the file
1924 determine the formats used. This command can be used by first loading
1925 the image into RAM, then using this command to look at it or display
1928 config CMD_BOOTCOUNT
1930 depends on BOOTCOUNT_LIMIT
1932 Enable the bootcount command, which allows interrogation and
1933 reset of the bootcounter.
1936 bool "Enable board-specific commands"
1938 (deprecated: instead, please define a Kconfig option for each command)
1940 Some boards have board-specific commands which are only enabled
1941 during developemnt and need to be turned off for production. This
1942 option provides a way to control this. The commands that are enabled
1943 vary depending on the board.
1945 config CMD_BLOCK_CACHE
1946 bool "blkcache - control and stats for block cache"
1947 depends on BLOCK_CACHE
1948 default y if BLOCK_CACHE
1950 Enable the blkcache command, which can be used to control the
1951 operation of the cache functions.
1952 This is most useful when fine-tuning the operation of the cache
1953 during development, but also allows the cache to be disabled when
1954 it might hurt performance (e.g. when using the ums command).
1961 Enable the 'button' command which allows to get the status of
1962 buttons supported by the board. The buttonss can be listed with
1963 'button list' and state can be known with 'button <label>'.
1964 Any button drivers can be controlled with this command, e.g.
1968 bool "icache or dcache"
1970 Enable the "icache" and "dcache" commands
1972 config CMD_CONITRACE
1973 bool "conitrace - trace console input codes"
1975 Enable the 'conitrace' command which displays the codes received
1976 from the console input as hexadecimal numbers.
1979 bool "Enable clear screen command 'cls'"
1980 default y if LCD || VIDEO
1982 Enable the 'cls' command which clears the screen contents
1983 on video frame buffer.
1986 bool "efidebug - display/configure UEFI environment"
1987 depends on EFI_LOADER
1988 select EFI_DEVICE_PATH_TO_TEXT
1990 Enable the 'efidebug' command which provides a subset of UEFI
1991 shell utility with simplified functionality. It will be useful
1992 particularly for managing boot parameters as well as examining
1993 various EFI status for debugging.
1995 config CMD_EFICONFIG
1996 bool "eficonfig - provide menu-driven uefi variables maintenance interface"
1997 depends on CMD_BOOTEFI_BOOTMGR
1999 Enable the 'eficonfig' command which provides the menu-driven UEFI
2000 variable maintenance interface.
2002 config CMD_EXCEPTION
2003 bool "exception - raise exception"
2004 depends on ARM || RISCV || SANDBOX || X86
2006 Enable the 'exception' command which allows to raise an exception.
2013 Enable the 'led' command which allows for control of LEDs supported
2014 by the board. The LEDs can be listed with 'led list' and controlled
2015 with led on/off/togle/blink. Any LED drivers can be controlled with
2016 this command, e.g. led_gpio.
2023 Enable the 'date' command for getting/setting the time/date in RTC
2030 Enable the 'rtc' command for low-level access to RTC devices.
2035 Run commands and summarize execution time.
2038 bool "gettime - read elapsed time"
2040 Enable the 'gettime' command which reads the elapsed time since
2041 U-Boot started running. This shows the time in seconds and
2042 milliseconds. See also the 'bootstage' command which provides more
2043 flexibility for boot timing.
2046 bool "pause command"
2048 Delay execution waiting for any user input.
2049 Useful to allow the user to read a failure log.
2054 default y if SANDBOX
2057 Print bytes from the hardware random number generator.
2059 config CMD_KASLRSEED
2063 Set the kaslr-seed in the chosen node with entropy provided by a
2064 hardware random number generator.
2070 Delay execution for some time
2073 bool "support for multiprocessor commands"
2077 This enables commands to bringup different processors
2078 in multiprocessor cases.
2083 Access the system timer.
2089 This provides basic access to the U-Boot's sound support. The main
2090 feature is to play a beep.
2092 sound init - set up sound system
2093 sound play - play a sound
2099 Boot image via local extlinux.conf file
2105 This provides access to the QEMU firmware interface. The main
2106 feature is to allow easy loading of files passed to qemu-system
2107 via -kernel / -initrd
2112 This provides access to Linux PStore with Rammoops backend. The main
2113 feature is to allow to display or save PStore records.
2115 See doc/pstore.rst for more information.
2119 config CMD_PSTORE_MEM_ADDR
2120 hex "Memory Address"
2121 depends on CMD_PSTORE
2123 Base addr used for PStore ramoops memory, should be identical to
2124 ramoops.mem_address parameter used by kernel
2126 config CMD_PSTORE_MEM_SIZE
2128 depends on CMD_PSTORE
2131 Size of PStore ramoops memory, should be identical to ramoops.mem_size
2132 parameter used by kernel, a power of 2 and larger than the sum of the
2135 config CMD_PSTORE_RECORD_SIZE
2136 hex "Dump record size"
2137 depends on CMD_PSTORE
2140 Size of each dump done on oops/panic, should be identical to
2141 ramoops.record_size parameter used by kernel and a power of 2
2144 config CMD_PSTORE_CONSOLE_SIZE
2145 hex "Kernel console log size"
2146 depends on CMD_PSTORE
2149 Size of kernel console log, should be identical to
2150 ramoops.console_size parameter used by kernel and a power of 2
2153 config CMD_PSTORE_FTRACE_SIZE
2154 hex "FTrace log size"
2155 depends on CMD_PSTORE
2158 Size of ftrace log, should be identical to ramoops.ftrace_size
2159 parameter used by kernel and a power of 2
2161 config CMD_PSTORE_PMSG_SIZE
2162 hex "User space message log size"
2163 depends on CMD_PSTORE
2166 Size of user space message log, should be identical to
2167 ramoops.pmsg_size parameter used by kernel and a power of 2
2169 config CMD_PSTORE_ECC_SIZE
2171 depends on CMD_PSTORE
2174 if non-zero, the option enables ECC support and specifies ECC buffer
2175 size in bytes (1 is a special value, means 16 bytes ECC), should be
2176 identical to ramoops.ramoops_ecc parameter used by kernel
2180 source "cmd/mvebu/Kconfig"
2183 bool "terminal - provides a way to attach a serial terminal"
2185 Provides a 'cu'-like serial terminal command. This can be used to
2186 access other serial ports from the system console. The terminal
2187 is very simple with no special processing of characters. As with
2188 cu, you can press ~. (tilde followed by period) to exit.
2191 bool "uuid, guid - generation of unique IDs"
2194 This enables two commands:
2196 uuid - generate random Universally Unique Identifier
2197 guid - generate Globally Unique Identifier based on random UUID
2199 The two commands are very similar except for the endianness of the
2202 config CMD_VIDCONSOLE
2203 bool "lcdputs and setcurs"
2207 Enabling this will provide 'setcurs' and 'lcdputs' commands which
2208 support cursor positioning and drawing strings on the video
2209 console (framebuffer).
2211 The name 'lcdputs' is a bit of a misnomer, but so named because the
2212 video device is often an LCD.
2216 source "cmd/ti/Kconfig"
2218 config CMD_BOOTSTAGE
2219 bool "Enable the 'bootstage' command"
2220 depends on BOOTSTAGE
2222 Add a 'bootstage' command which supports printing a report
2223 and un/stashing of bootstage data.
2225 menu "Power commands"
2227 bool "Enable Driver Model PMIC command"
2230 This is the pmic command, based on a driver model pmic's API.
2231 Command features are unchanged:
2232 - list - list pmic devices
2233 - pmic dev <id> - show or [set] operating pmic device (NEW)
2234 - pmic dump - dump registers
2235 - pmic read address - read byte of register at address
2236 - pmic write address - write byte to register at address
2237 The only one change for this command is 'dev' subcommand.
2239 config CMD_REGULATOR
2240 bool "Enable Driver Model REGULATOR command"
2241 depends on DM_REGULATOR
2243 This command is based on driver model regulator's API.
2244 User interface features:
2245 - list - list regulator devices
2246 - regulator dev <id> - show or [set] operating regulator device
2247 - regulator info - print constraints info
2248 - regulator status - print operating status
2249 - regulator value <val] <-f> - print/[set] voltage value [uV]
2250 - regulator current <val> - print/[set] current value [uA]
2251 - regulator mode <id> - print/[set] operating mode id
2252 - regulator enable - enable the regulator output
2253 - regulator disable - disable the regulator output
2255 The '-f' (force) option can be used for set the value which exceeds
2256 the limits, which are found in device-tree and are kept in regulator's
2257 uclass plat structure.
2261 menu "Security commands"
2263 bool "Enable the 'aes' command"
2266 This provides a means to encrypt and decrypt data using the AES
2267 (Advanced Encryption Standard). This algorithm uses a symetric key
2268 and is widely used as a streaming cipher. Different key lengths are
2269 supported by the algorithm but this command only supports 128 bits
2273 bool "Enable the 'blob' command"
2274 depends on !MX6ULL && !MX6SLL && !MX6SL
2275 select IMX_HAB if ARCH_MX6 || ARCH_MX7 || ARCH_MX7ULP || ARCH_IMX8M
2277 This is used with the Freescale secure boot mechanism.
2279 Freescale's SEC block has built-in Blob Protocol which provides
2280 a method for protecting user-defined data across system power
2281 cycles. SEC block protects data in a data structure called a Blob,
2282 which provides both confidentiality and integrity protection.
2284 Encapsulating data as a blob
2285 Each time that the Blob Protocol is used to protect data, a
2286 different randomly generated key is used to encrypt the data.
2287 This random key is itself encrypted using a key which is derived
2288 from SoC's non-volatile secret key and a 16 bit Key identifier.
2289 The resulting encrypted key along with encrypted data is called a
2290 blob. The non-volatile secure key is available for use only during
2293 During decapsulation, the reverse process is performed to get back
2297 blob enc - encapsulating data as a cryptgraphic blob
2298 blob dec - decapsulating cryptgraphic blob to get the data
2302 blob enc src dst len km
2304 Encapsulate and create blob of data $len bytes long
2305 at address $src and store the result at address $dst.
2306 $km is the 16 byte key modifier is also required for
2307 generation/use as key for cryptographic operation. Key
2308 modifier should be 16 byte long.
2310 blob dec src dst len km
2312 Decapsulate the blob of data at address $src and
2313 store result of $len byte at addr $dst.
2314 $km is the 16 byte key modifier is also required for
2315 generation/use as key for cryptographic operation. Key
2316 modifier should be 16 byte long.
2319 bool "Support 'hash' command"
2322 This provides a way to hash data in memory using various supported
2323 algorithms (such as SHA1, MD5, CRC32). The computed digest can be
2324 saved to memory or to an environment variable. It is also possible
2325 to verify a hash against data in memory.
2328 bool "Support the 'hvc' command"
2329 depends on ARM_SMCCC
2331 Allows issuing Hypervisor Calls (HVCs). Mostly useful for
2332 development and testing.
2335 bool "Support the 'smc' command"
2336 depends on ARM_SMCCC
2338 Allows issuing Secure Monitor Calls (SMCs). Mostly useful for
2339 development and testing.
2345 Add -v option to verify data against a hash.
2348 bool "scp03 - SCP03 enable and rotate/provision operations"
2351 This command provides access to a Trusted Application
2352 running in a TEE to request Secure Channel Protocol 03
2353 (SCP03) enablement and/or rotation of its SCP03 keys.
2362 bool "Enable the 'tpm' command"
2363 depends on TPM_V1 || TPM_V2
2364 select CMD_TPM_V1 if TPM_V1
2365 select CMD_TPM_V2 if TPM_V2
2367 This provides a means to talk to a TPM from the command line. A wide
2368 range of commands if provided - see 'tpm help' for details. The
2369 command requires a suitable TPM on your board and the correct driver
2375 bool "Enable the 'tpm test' command"
2378 This provides a a series of tests to confirm that the TPMv1.x is
2379 working correctly. The tests cover initialisation, non-volatile RAM,
2380 extend, global lock and checking that timing is within expectations.
2381 The tests pass correctly on Infineon TPMs but may need to be adjusted
2388 menu "Firmware commands"
2390 bool "Enable crosec command"
2394 Enable command-line access to the Chrome OS EC (Embedded
2395 Controller). This provides the 'crosec' command which has
2396 a number of sub-commands for performing EC tasks such as
2397 updating its flash, accessing a small saved context area
2398 and talking to the I2C bus behind the EC (if there is one).
2401 menu "Filesystem commands"
2403 bool "Enable the 'btrsubvol' command"
2406 This enables the 'btrsubvol' command to list subvolumes
2407 of a BTRFS filesystem. There are no special commands for
2408 listing BTRFS directories or loading BTRFS files - this
2409 can be done by the generic 'fs' commands (see CMD_FS_GENERIC)
2410 when BTRFS is enabled (see FS_BTRFS).
2413 bool "Enable the 'cbfs' command"
2416 Define this to enable support for reading from a Coreboot
2417 filesystem. This is a ROM-based filesystem used for accessing files
2418 on systems that use coreboot as the first boot-loader and then load
2419 U-Boot to actually boot the Operating System. Available commands are
2420 cbfsinit, cbfsinfo, cbfsls and cbfsload.
2423 bool "Enable the 'cramfs' command"
2424 depends on FS_CRAMFS
2426 This provides commands for dealing with CRAMFS (Compressed ROM
2427 filesystem). CRAMFS is useful when space is tight since files are
2428 compressed. Two commands are provided:
2430 cramfsls - lists files in a cramfs image
2431 cramfsload - loads a file from a cramfs image
2434 bool "EROFS command support"
2437 Support for the EROFS fs
2440 bool "ext2 command support"
2443 Enables EXT2 FS command
2446 bool "ext4 command support"
2449 Enables EXT4 FS command
2451 config CMD_EXT4_WRITE
2453 bool "ext4 write command support"
2456 Enables EXT4 FS write command
2459 bool "FAT command support"
2462 Support for the FAT fs
2465 bool "SquashFS command support"
2468 Enables SquashFS filesystem commands (e.g. load, ls).
2470 config CMD_FS_GENERIC
2471 bool "filesystem commands"
2473 Enables filesystem commands (e.g. load, ls) that work for multiple
2477 bool "fsuuid command"
2479 Enables fsuuid command for filesystem UUID.
2482 bool "jffs2 command"
2485 Enables commands to support the JFFS2 (Journalling Flash File System
2486 version 2) filesystem. This enables fsload, ls and fsinfo which
2487 provide the ability to load files, list directories and obtain
2488 filesystem information.
2491 string "Default device for JFFS2"
2492 depends on CMD_JFFS2
2495 The default device to use with the jffs2 command.
2497 config JFFS2_PART_OFFSET
2498 hex "Default offset within flash to locate the JFFS2 image"
2499 depends on CMD_JFFS2
2502 The default offset within flash to locate the JFFS2 image.
2504 config JFFS2_PART_SIZE
2505 hex "Default size of JFFS2 partition"
2506 depends on CMD_JFFS2
2509 The default size of the JFFS2 partition
2512 bool "MTD partition support"
2515 MTD partitioning tool support.
2516 It is strongly encouraged to avoid using this command
2517 anymore along with 'sf', 'nand', 'onenand'. One can still
2518 declare the partitions in the mtdparts environment variable
2519 but better use the MTD stack and the 'mtd' command instead.
2521 config CMD_MTDPARTS_SPREAD
2522 bool "Padd partition size to take account of bad blocks"
2523 depends on CMD_MTDPARTS
2525 This enables the 'spread' sub-command of the mtdparts command.
2526 This command will modify the existing mtdparts variable by increasing
2527 the size of the partitions such that 1) each partition's net size is
2528 at least as large as the size specified in the mtdparts variable and
2529 2) each partition starts on a good block.
2531 config CMD_MTDPARTS_SHOW_NET_SIZES
2532 bool "Show net size (w/o bad blocks) of partitions"
2533 depends on CMD_MTDPARTS
2535 Adds two columns to the printed partition table showing the
2536 effective usable size of a partition, if bad blocks are taken
2539 config MTDIDS_DEFAULT
2540 string "Default MTD IDs"
2541 depends on MTD || SPI_FLASH
2542 depends on !SYS_MTDPARTS_RUNTIME
2544 Defines a default MTD IDs list for use with MTD partitions in the
2545 Linux MTD command line partitions format.
2547 config MTDPARTS_DEFAULT
2548 string "Default MTD partition scheme"
2549 depends on MTD || SPI_FLASH
2550 depends on !SYS_MTDPARTS_RUNTIME
2552 Defines a default MTD partitioning scheme in the Linux MTD command
2553 line partitions format
2556 bool "reiser - Access to reiserfs filesystems"
2558 This provides two commands which operate on a resierfs filesystem,
2559 commonly used some years ago:
2561 reiserls - list files
2562 reiserload - load a file
2565 bool "yaffs2 - Access of YAFFS2 filesystem"
2569 This provides commands for accessing a YAFFS2 filesystem. Yet
2570 Another Flash Filesystem 2 is a filesystem designed specifically
2571 for NAND flash. It incorporates bad-block management and ensures
2572 that device writes are sequential regardless of filesystem
2576 bool "zfs - Access of ZFS filesystem"
2578 This provides commands to accessing a ZFS filesystem, commonly used
2579 on Solaris systems. Two sub-commands are provided:
2581 zfsls - list files in a directory
2582 zfsload - load a file
2584 See doc/README.zfs for more details.
2588 menu "Debug commands"
2590 config CMD_CBSYSINFO
2593 default y if SYS_COREBOOT
2595 This provides information about the coreboot sysinfo table stored in
2596 memory by coreboot before jumping to U-Boot. It can be useful for
2597 debugging the beaaviour of coreboot or U-Boot.
2600 bool "cyclic - Show information about cyclic functions"
2604 This enables the 'cyclic' command which provides information about
2605 cyclic execution functions. This infrastructure allows registering
2606 functions to be executed cyclically, e.g. every 100ms. These commands
2609 cyclic list - list cyclic functions
2610 cyclic cyclic demo <cycletime_ms> <delay_us> - register cyclic
2613 See doc/develop/cyclic.rst for more details.
2616 bool "diag - Board diagnostics"
2618 This command provides access to board diagnostic tests. These are
2619 called Power-on Self Tests (POST). The command allows listing of
2620 available tests and running either all the tests, or specific tests
2624 bool "event - Show information about events"
2626 default y if EVENT_DEBUG
2628 This enables the 'event' command which provides information about
2629 events and event-handler routines. This can help to device event
2633 bool "irq - Show information about interrupts"
2634 depends on !ARM && !MIPS && !RISCV && !SH
2636 This enables two commands:
2638 interrupts - enable or disable interrupts
2639 irqinfo - print device-specific interrupt information
2642 bool "kgdb - Allow debugging of U-Boot with gdb"
2645 This enables a 'kgdb' command which allows gdb to connect to U-Boot
2646 over a serial link for debugging purposes. This allows
2647 single-stepping, inspecting variables, etc. This is supported only
2648 on PowerPC at present.
2651 bool "log - Generation, control and access to logging"
2655 This provides access to logging features. It allows the output of
2656 log data to be controlled to a limited extent (setting up the default
2657 maximum log level for emitting of records). It also provides access
2658 to a command used for testing the log system.
2661 bool "trace - Support tracing of function calls and timing"
2665 Enables a command to control using of function tracing within
2666 U-Boot. This allows recording of call traces including timing
2667 information. The command can write data to memory for exporting
2668 for analysis (e.g. using bootchart). See doc/README.trace for full
2672 bool "avb - Android Verified Boot 2.0 operations"
2673 depends on AVB_VERIFY
2675 Enables a "avb" command to perform verification of partitions using
2676 Android Verified Boot 2.0 functionality. It includes such subcommands:
2677 avb init - initialize avb2 subsystem
2678 avb read_rb - read rollback index
2679 avb write_rb - write rollback index
2680 avb is_unlocked - check device lock state
2681 avb get_uuid - read and print uuid of a partition
2682 avb read_part - read data from partition
2683 avb read_part_hex - read data from partition and output to stdout
2684 avb write_part - write data to partition
2685 avb verify - run full verification chain
2687 config CMD_STACKPROTECTOR_TEST
2688 bool "Test command for stack protector"
2689 depends on STACKPROTECTOR
2691 Enable stackprot_test command
2692 The stackprot_test command will force a stack overrun to test
2693 the stack smashing detection mechanisms.
2698 tristate "Enable UBI - Unsorted block images commands"
2701 UBI is a software layer above MTD layer which admits use of LVM-like
2702 logical volumes on top of MTD devices, hides some complexities of
2703 flash chips like wear and bad blocks and provides some other useful
2704 capabilities. Please, consult the MTD web site for more details
2705 (www.linux-mtd.infradead.org). Activate this option if you want
2706 to use U-Boot UBI commands.
2707 It is also strongly encouraged to also enable CONFIG_MTD to get full
2710 config CMD_UBI_RENAME
2711 bool "Enable rename"
2714 Enable a "ubi" command to rename ubi volume:
2715 ubi rename <oldname> <newname>
2718 tristate "Enable UBIFS - Unsorted block images filesystem commands"
2720 default y if CMD_UBI
2724 UBIFS is a file system for flash devices which works on top of UBI.
2726 config MMC_SPEED_MODE_SET
2727 bool "set speed mode using mmc command"
2731 Enable setting speed mode using mmc rescan and mmc dev commands.
2732 The speed mode is provided as the last argument in these commands
2733 and is indicated using the index from enum bus_mode in
2734 include/mmc.h. A speed mode can be set only if it has already
2735 been enabled in the device tree.
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