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 "Support read SEAMA NAND images"
342 depends on MTD_RAW_NAND
344 Support reading NAND Seattle Image (SEAMA) images.
347 bool "vbe - Verified Boot for Embedded"
348 depends on BOOTMETH_VBE
349 default y if BOOTSTD_FULL
351 Provides various subcommands related to VBE, such as listing the
352 available methods, looking at the state and changing which method
353 is used to boot. Updating the parameters is not currently
357 bool "Support booting VxWorks OS images"
361 Support booting VxWorks images via the bootm command.
364 hex "Maximum size of a decompresed OS image"
365 depends on CMD_BOOTM || CMD_BOOTI || CMD_BOOTZ
366 default 0x4000000 if PPC || ARM64
367 default 0x1000000 if X86 || ARCH_MX6 || ARCH_MX7
370 This is the maximum size of the buffer that is used to decompress the OS
371 image in to, if passing a compressed image to bootm/booti/bootz.
375 depends on EFI_LOADER
378 Boot an EFI image from memory.
380 config CMD_BOOTEFI_HELLO_COMPILE
381 bool "Compile a standard EFI hello world binary for testing"
382 depends on CMD_BOOTEFI && !CPU_V7M
385 This compiles a standard EFI hello world application with U-Boot so
386 that it can be used with the test/py testing framework. This is useful
387 for testing that EFI is working at a basic level, and for bringing
388 up EFI support on a new architecture.
390 No additional space will be required in the resulting U-Boot binary
391 when this option is enabled.
393 config CMD_BOOTEFI_HELLO
394 bool "Allow booting a standard EFI hello world for testing"
395 depends on CMD_BOOTEFI_HELLO_COMPILE
396 default y if CMD_BOOTEFI_SELFTEST
398 This adds a standard EFI hello world application to U-Boot so that
399 it can be used with the 'bootefi hello' command. This is useful
400 for testing that EFI is working at a basic level, and for bringing
401 up EFI support on a new architecture.
403 source lib/efi_selftest/Kconfig
410 Add an ANSI terminal boot menu command.
415 Android DTB/DTBO image manipulation commands. Read dtb/dtbo files from
416 image into RAM, dump image structure information, etc. Those dtb/dtbo
417 files should be merged in one dtb further, which needs to be passed to
418 the kernel, as part of a boot process.
422 depends on ANDROID_BOOT_IMAGE
424 Android Boot Image manipulation commands. Allows one to extract
425 images contained in boot.img, like kernel, ramdisk, dtb, etc, and
426 obtain corresponding meta-information from boot.img.
428 See doc/android/boot-image.rst for details.
431 bool "bootelf, bootvx"
435 Boot an ELF/vxWorks image from the memory.
438 bool "Flattened Device Tree utility commands"
442 Do FDT related setup before booting into the Operating System.
444 config SUPPORT_EXTENSION_SCAN
448 bool "Extension board management command"
450 depends on SUPPORT_EXTENSION_SCAN
452 Enables the "extension" command, which allows to detect
453 extension boards connected to the system, and apply
454 corresponding Device Tree overlays.
460 Start an application at a given address.
466 Run the command in the given environment variable.
472 Print header information for application image.
477 List all images found in flash
483 Extract a part of a multi-image.
488 Print file as hexdump to standard output
491 bool "spl export - Export boot information for Falcon boot"
494 Falcon mode allows booting directly from SPL into an Operating
495 System such as Linux, thus skipping U-Boot proper. See
496 doc/README.falcon for full information about how to use this
499 config CMD_SPL_NAND_OFS
500 hex "Offset of OS args or dtb for Falcon-mode NAND boot"
501 depends on CMD_SPL && (TPL_NAND_SUPPORT || SPL_NAND_SUPPORT)
504 This provides the offset of the command line arguments for Linux
505 when booting from NAND in Falcon mode. See doc/README.falcon
506 for full information about how to use this option (and also see
507 board/gateworks/gw_ventana/README for an example).
509 config CMD_SPL_NOR_OFS
510 hex "Offset of OS args or dtb for Falcon-mode NOR boot"
511 depends on CMD_SPL && SPL_NOR_SUPPORT
514 This provides the offset of the command line arguments or dtb for
515 Linux when booting from NOR in Falcon mode.
517 config CMD_SPL_WRITE_SIZE
518 hex "Size of argument area"
522 This provides the size of the command-line argument area in NAND
523 flash used by Falcon-mode boot. See the documentation until CMD_SPL
526 config CMD_THOR_DOWNLOAD
527 bool "thor - TIZEN 'thor' download"
530 Implements the 'thor' download protocol. This is a way of
531 downloading a software update over USB from an attached host.
532 There is no documentation about this within the U-Boot source code
533 but you should be able to find something on the interwebs.
535 config THOR_RESET_OFF
536 bool "thor: Disable reset on completion"
537 depends on CMD_THOR_DOWNLOAD
540 bool "zboot - x86 boot command"
542 With x86 machines it is common to boot a bzImage file which
543 contains both a kernel and a setup.bin file. The latter includes
544 configuration information from the dark ages which x86 boards still
545 need to pick things out of.
547 Consider using FIT in preference to this since it supports directly
548 booting both 32- and 64-bit kernels, as well as secure boot.
549 Documentation is available in doc/uImage.FIT/x86-fit-boot.txt
553 menu "Environment commands"
556 bool "ask for env variable"
558 Ask for environment variable
576 Edit environment variable.
581 Allow for searching environment variables
587 Save all environment variables into the compiled-in persistent
592 depends on CMD_SAVEENV
594 Erase environment variables from the compiled-in persistent
597 config CMD_ENV_EXISTS
601 Check if a variable is defined in the environment for use in
604 config CMD_ENV_CALLBACK
605 bool "env callbacks - print callbacks and their associated variables"
607 Some environment variable have callbacks defined by
608 U_BOOT_ENV_CALLBACK. These are called when the variable changes.
609 For example changing "baudrate" adjust the serial baud rate. This
610 command lists the currently defined callbacks.
613 bool "env flags -print variables that have non-default flags"
615 Some environment variables have special flags that control their
616 behaviour. For example, serial# can only be written once and cannot
617 be deleted. This command shows the variables that have special
620 config CMD_NVEDIT_EFI
621 bool "env [set|print] -e - set/print UEFI variables"
622 depends on EFI_LOADER
625 UEFI variables are encoded as some form of U-Boot variables.
626 If enabled, we are allowed to set/print UEFI variables using
627 "env" command with "-e" option without knowing details.
629 config CMD_NVEDIT_INDIRECT
630 bool "env indirect - Sets environment value from another"
632 config CMD_NVEDIT_INFO
633 bool "env info - print or evaluate environment information"
635 Print environment information:
636 - env_valid : is environment valid
637 - env_ready : is environment imported into hash table
638 - env_use_default : is default environment used
640 This command can be optionally used for evaluation in scripts:
641 [-d] : evaluate whether default environment is used
642 [-p] : evaluate whether environment can be persisted
644 The result of multiple evaluations will be combined with AND.
646 config CMD_NVEDIT_LOAD
649 Load all environment variables from the compiled-in persistent
652 config CMD_NVEDIT_SELECT
655 Select the compiled-in persistent storage of environment variables.
659 menu "Memory commands"
664 Compute binary operations (xor, or, and) of byte arrays of arbitrary
665 size from memory and store the result in memory or the environment.
669 default y if BLOBLIST
671 Show information about the bloblist, a collection of binary blobs
672 held in memory that persist between SPL and U-Boot. In the case of
673 x86 devices the bloblist can be used to hold ACPI tables so that they
674 remain available in memory.
687 Add -v option to verify data against a crc32 checksum.
690 bool "eeprom - EEPROM subsystem"
692 (deprecated, needs conversion to driver model)
693 Provides commands to read and write EEPROM (Electrically Erasable
694 Programmable Read Only Memory) chips that are connected over an
697 config CMD_EEPROM_LAYOUT
698 bool "Enable layout-aware eeprom commands"
699 depends on CMD_EEPROM
701 (deprecated, needs conversion to driver model)
702 When enabled, additional eeprom sub-commands become available.
704 eeprom print - prints the contents of the eeprom in a human-readable
705 way (eeprom layout fields, and data formatted to be fit for human
708 eeprom update - allows user to update eeprom fields by specifying
709 the field name, and providing the new data in a human readable format
710 (same format as displayed by the eeprom print command).
712 Both commands can either auto detect the layout, or be told which
716 __weak int parse_layout_version(char *str)
717 - override to provide your own layout name parsing
718 __weak void __eeprom_layout_assign(struct eeprom_layout *layout,
720 - override to setup the layout metadata based on the version
721 __weak int eeprom_layout_detect(unsigned char *data)
722 - override to provide your own algorithm for detecting layout
725 - contains various printing and updating functions for common
726 types of eeprom fields. Can be used for defining
729 config EEPROM_LAYOUT_HELP_STRING
730 string "Tells user what layout names are supported"
731 depends on CMD_EEPROM_LAYOUT
732 default "<not defined>"
734 Help printed with the LAYOUT VERSIONS part of the 'eeprom'
737 config SYS_I2C_EEPROM_BUS
738 int "I2C bus of the EEPROM device."
739 depends on CMD_EEPROM
742 config SYS_I2C_EEPROM_ADDR_LEN
743 int "Length in bytes of the EEPROM memory array address"
744 depends on CMD_EEPROM || ID_EEPROM
748 Note: This is NOT the chip address length!
750 config SYS_EEPROM_SIZE
751 depends on CMD_EEPROM
752 int "Size in bytes of the EEPROM device"
755 config SYS_EEPROM_PAGE_WRITE_BITS
756 int "Number of bits used to address bytes in a single page"
757 depends on CMD_EEPROM
760 The EEPROM page size is 2^SYS_EEPROM_PAGE_WRITE_BITS.
761 A 64 byte page, for example would require six bits.
763 config SYS_EEPROM_PAGE_WRITE_DELAY_MS
764 int "Number of milliseconds to delay between page writes"
765 depends on CMD_EEPROM || CMD_I2C
771 Infinite write loop on address range
777 Compute MD5 checksum.
781 depends on CMD_MD5SUM
783 Add -v option to verify data against an MD5 checksum.
788 Display memory information.
791 bool "md, mm, nm, mw, cp, cmp, base, loop"
796 mm - memory modify (auto-incrementing address)
797 nm - memory modify (constant address)
798 mw - memory write (fill)
801 base - print or set address offset
802 loop - initialize loop on address range
804 config CMD_MEM_SEARCH
805 bool "ms - Memory search"
807 Memory-search command
809 This allows searching through a region of memory looking for hex
810 data (byte, 16-bit word, 32-bit long, also 64-bit on machines that
811 support it). It is also possible to search for a string. The
812 command accepts a memory range and a list of values to search for.
813 The values need to appear in memory in the same order they are given
814 in the command. At most 10 matches can be returned at a time, but
815 pressing return will show the next 10 matches. Environment variables
816 are set for use with scripting (memmatches, memaddr, mempos).
819 bool "Enable cyclic md/mw commands"
820 depends on CMD_MEMORY
822 Add the "mdc" and "mwc" memory commands. These are cyclic
827 This command will print 4 bytes (10,11,12,13) each 500 ms.
829 => mwc.l 100 12345678 10
830 This command will write 12345678 to address 100 all 10 ms.
835 depends on CMD_MEMORY && (LIB_RAND || LIB_HW_RAND)
837 random - fill memory with random data
842 Simple RAM read/write test.
846 config SYS_ALT_MEMTEST
847 bool "Alternative test"
849 Use a more complete alternative memory test.
853 config SYS_ALT_MEMTEST_BITFLIP
857 The alternative memory test includes bitflip test since 2020.07.
858 The bitflip test significantly increases the overall test time.
859 Bitflip test can optionally be disabled here.
863 config SYS_MEMTEST_START
864 hex "default start address for mtest"
867 This is the default start address for mtest for simple read/write
868 test. If no arguments are given to mtest, default address is used
871 config SYS_MEMTEST_END
872 hex "default end address for mtest"
875 This is the default end address for mtest for simple read/write
876 test. If no arguments are given to mtest, default address is used
885 Compute SHA1 checksum.
887 config SHA1SUM_VERIFY
889 depends on CMD_SHA1SUM
891 Add -v option to verify data against a SHA1 checksum.
894 bool "strings - display strings in memory"
896 This works similarly to the Unix 'strings' command except that it
897 works with a memory range. String of printable characters found
898 within the range are displayed. The minimum number of characters
899 for a sequence to be considered a string can be provided.
903 menu "Compression commands"
907 default y if CMD_BOOTI
910 Support decompressing an LZMA (Lempel-Ziv-Markov chain algorithm)
915 default y if CMD_BOOTI
918 Support decompressing an LZ4 image from memory region.
922 default y if CMD_BOOTI
925 Uncompress a zip-compressed memory region.
929 select GZIP_COMPRESSED
931 Compress a memory region with zlib deflate method.
935 menu "Device access commands"
938 #depends on FLASH_CFI_DRIVER
941 ARM Ltd reference designs flash partition access
944 bool "adc - Access Analog to Digital Converters info and data"
946 depends on DM_REGULATOR
948 Shows ADC device info and permit printing one-shot analog converted
949 data from a named Analog to Digital Converter.
954 depends on PARTITIONS
956 Read/modify/write the fields of Bootloader Control Block, usually
957 stored on the flash "misc" partition with its structure defined in:
958 https://android.googlesource.com/platform/bootable/recovery/+/master/
959 bootloader_message/include/bootloader_message/bootloader_message.h
961 Some real-life use-cases include (but are not limited to):
962 - Determine the "boot reason" (and act accordingly):
963 https://source.android.com/devices/bootloader/boot-reason
964 - Get/pass a list of commands from/to recovery:
965 https://android.googlesource.com/platform/bootable/recovery
966 - Inspect/dump the contents of the BCB fields
969 bool "bind/unbind - Bind or unbind a device to/from a driver"
972 Bind or unbind a device to/from a driver from the command line.
973 This is useful in situations where a device may be handled by several
974 drivers. For example, this can be used to bind a UDC to the usb ether
975 gadget driver from the command line.
978 bool "clk - Show clock frequencies"
981 Shows clock frequences by calling a sock_clk_dump() hook function.
982 This is depreated in favour of using the CLK uclass and accessing
983 clock values from associated drivers. However currently no command
987 bool "demo - Demonstration commands for driver model"
990 Provides a 'demo' command which can be used to play around with
991 driver model. To use this properly you will need to enable one or
992 both of the demo devices (DM_DEMO_SHAPE and DM_DEMO_SIMPLE).
993 Otherwise you will always get an empty list of devices. The demo
994 devices are defined in the sandbox device tree, so the easiest
995 option is to use sandbox and pass the -d point to sandbox's
1002 Enables the command "dfu" which is used to have U-Boot create a DFU
1003 class device via USB. This command requires that the "dfu_alt_info"
1004 environment variable be set and define the alt settings to expose to
1008 bool "dm - Access to driver model information"
1011 Provides access to driver model data structures and information,
1012 such as a list of devices, list of uclasses and the state of each
1013 device (e.g. activated). This is not required for operation, but
1014 can be useful to see the state of driver model for debugging or
1018 bool "fastboot - Android fastboot support"
1021 This enables the command "fastboot" which enables the Android
1022 fastboot mode for the platform. Fastboot is a protocol for
1023 downloading images, flashing and device control used on
1024 Android devices. Fastboot requires either the network stack
1025 enabled or support for acting as a USB device.
1027 See doc/android/fastboot.rst for more information.
1030 bool "flinfo, erase, protect"
1032 depends on MTD || FLASH_CFI_DRIVER || MTD_NOR_FLASH
1035 flinfo - print FLASH memory information
1036 erase - FLASH memory
1037 protect - enable or disable FLASH write protection
1046 config CMD_FPGA_LOADBP
1047 bool "fpga loadbp - load partial bitstream (Xilinx only)"
1050 Supports loading an FPGA device from a bitstream buffer containing
1051 a partial bitstream.
1053 config CMD_FPGA_LOADFS
1054 bool "fpga loadfs - load bitstream from FAT filesystem (Xilinx only)"
1057 Supports loading an FPGA device from a FAT filesystem.
1059 config CMD_FPGA_LOADMK
1060 bool "fpga loadmk - load bitstream from image"
1063 Supports loading an FPGA device from a image generated by mkimage.
1065 config CMD_FPGA_LOADP
1066 bool "fpga loadp - load partial bitstream"
1069 Supports loading an FPGA device from a bitstream buffer containing
1070 a partial bitstream.
1072 config CMD_FPGA_LOAD_SECURE
1073 bool "fpga loads - loads secure bitstreams"
1075 select FPGA_LOAD_SECURE
1077 Enables the fpga loads command which is used to load secure
1078 (authenticated or encrypted or both) bitstreams on to FPGA.
1081 bool "fpgad - dump FPGA registers"
1083 (legacy, needs conversion to driver model)
1084 Provides a way to dump FPGA registers by calling the board-specific
1085 fpga_get_reg() function. This functions similarly to the 'md'
1089 bool "fuse - support for the fuse subssystem"
1091 (deprecated - needs conversion to driver model)
1092 This allows reading, sensing, programming or overriding fuses
1093 which control the behaviour of the device. The command uses the
1101 config CMD_GPIO_READ
1102 bool "gpio read - save GPIO value to variable"
1105 Enables the 'gpio read' command that saves the value
1106 of a GPIO pin to a variable.
1112 Control PWM channels, this allows invert/config/enable/disable PWM channels.
1115 bool "GPT (GUID Partition Table) command"
1116 select EFI_PARTITION
1117 select PARTITION_UUIDS
1120 Enable the 'gpt' command to ready and write GPT style partition
1124 bool "GPT Random UUID generation"
1127 Enable the generation of partitions with random UUIDs if none
1130 config CMD_GPT_RENAME
1131 bool "GPT partition renaming commands"
1134 Enables the 'gpt' command to interchange names on two GPT
1135 partitions via the 'gpt swap' command or to rename single
1136 partitions via the 'rename' command.
1139 bool "ide - Support for IDE drivers"
1142 Provides an 'ide' command which allows accessing the IDE drive,
1143 resetting the IDE interface, printing the partition table and
1144 geting device info. It also enables the 'diskboot' command which
1145 permits booting from an IDE drive.
1148 bool "io - Support for performing I/O accesses"
1150 Provides an 'iod' command to display I/O space and an 'iow' command
1151 to write values to the I/O space. This can be useful for manually
1152 checking the state of devices during boot when debugging device
1156 bool "iotrace - Support for tracing I/O activity"
1158 Provides an 'iotrace' command which supports recording I/O reads and
1159 writes in a trace buffer in memory . It also maintains a checksum
1160 of the trace records (even if space is exhausted) so that the
1161 sequence of I/O accesses can be verified.
1163 When debugging drivers it is useful to see what I/O accesses were
1164 done and in what order.
1166 Even if the individual accesses are of little interest it can be
1167 useful to verify that the access pattern is consistent each time
1168 an operation is performed. In this case a checksum can be used to
1169 characterise the operation of a driver. The checksum can be compared
1170 across different runs of the operation to verify that the driver is
1173 In particular, when performing major refactoring of the driver, where
1174 the access pattern should not change, the checksum provides assurance
1175 that the refactoring work has not broken the driver.
1177 This works by sneaking into the io.h heder for an architecture and
1178 redirecting I/O accesses through iotrace's tracing mechanism.
1180 For now no commands are provided to examine the trace buffer. The
1181 format is fairly simple, so 'md' is a reasonable substitute.
1183 Note: The checksum feature is only useful for I/O regions where the
1184 contents do not change outside of software control. Where this is not
1185 suitable you can fall back to manually comparing the addresses. It
1186 might be useful to enhance tracing to only checksum the accesses and
1187 not the data read/written.
1197 bool "w1 - Support for Dallas 1-Wire protocol"
1199 Dallas 1-wire protocol support
1205 Load a binary file over serial line.
1210 Load a binary over memory mapped.
1213 bool "loads - Load a file over serial in S-Record format"
1216 Load an S-Record file over serial line
1219 bool "Echo all characters received during a loads back to console"
1220 depends on CMD_LOADS
1222 If enabled, all characters received during a serial download (using
1223 the "loads" command) are echoed back. This might be needed by some
1224 terminal emulations (like "cu"), but may as well just take time on
1225 others. This sets the initial value of the "loads_echo" environment
1229 bool "saves - Save a file over serial in S-Record format"
1231 Provides a way to save a binary file using the Motorola S-Record
1232 format over the serial line.
1234 config SYS_LOADS_BAUD_CHANGE
1235 bool "Enable a temporary baudrate change during loads/saves command"
1236 depends on CMD_LOADS || CMD_SAVES
1238 config CMD_LOADXY_TIMEOUT
1239 int "loadxy_timeout"
1243 Initial timeout for loadx and loady commands. Zero means infinity.
1247 bool "lsblk - list block drivers and devices"
1249 Print list of available block device drivers, and for each, the list
1250 of known block devices.
1253 bool "MBR (Master Boot Record) command"
1254 select DOS_PARTITION
1256 Enable the 'mbr' command to ready and write MBR (Master Boot Record)
1257 style partition tables.
1263 Enable the command "misc" for accessing miscellaneous devices with
1264 a MISC uclass driver. The command provides listing all MISC devices
1265 as well as read and write functionalities via their drivers.
1271 MMC memory mapped support.
1275 config CMD_BKOPS_ENABLE
1276 bool "mmc bkops enable"
1279 Enable command for setting manual background operations handshake
1280 on a eMMC device. The feature is optionally available on eMMC devices
1281 conforming to standard >= 4.41.
1284 bool "Enable support for RPMB in the mmc command"
1285 depends on SUPPORT_EMMC_RPMB
1287 Enable the commands for reading, writing and programming the
1288 key for the Replay Protection Memory Block partition in eMMC.
1290 config CMD_MMC_SWRITE
1292 depends on MMC_WRITE
1295 Enable support for the "mmc swrite" command to write Android sparse
1304 Enable storage cloning over block devices, useful for
1305 initial flashing by external block device without network
1308 config CMD_OPTEE_RPMB
1309 bool "Enable read/write support on RPMB via OPTEE"
1310 depends on SUPPORT_EMMC_RPMB && OPTEE
1312 Enable the commands for reading, writing persistent named values
1313 in the Replay Protection Memory Block partition in eMMC by
1314 using Persistent Objects in OPTEE
1319 select MTD_PARTITIONS
1321 MTD commands support.
1325 depends on MULTIPLEXER
1327 List, select, and deselect mux controllers on the fly.
1331 default y if NAND_SUNXI
1332 depends on MTD_RAW_NAND
1337 config CMD_NAND_TRIMFFS
1338 bool "nand write.trimffs"
1339 default y if ARCH_SUNXI
1341 Allows one to skip empty pages when flashing something on a NAND.
1343 config CMD_NAND_LOCK_UNLOCK
1344 bool "nand lock/unlock"
1346 NAND locking support.
1348 config CMD_NAND_TORTURE
1351 NAND torture support.
1360 NVM Express device support
1363 bool "onenand - access to onenand device"
1366 OneNAND is a brand of NAND ('Not AND' gate) flash which provides
1367 various useful features. This command allows reading, writing,
1368 and erasing blocks. It allso provides a way to show and change
1369 bad blocks, and test the device.
1371 config USE_ONENAND_BOARD_INIT
1372 bool "Call onenand_board_init() in the onenand command"
1373 depends on CMD_ONENAND
1378 Enable the 'osd' command which allows to query information from and
1379 write text data to a on-screen display (OSD) device; a virtual device
1380 associated with a display capable of displaying a text overlay on the
1381 display it's associated with..
1385 depends on PARTITIONS
1386 select PARTITION_UUIDS
1388 Read and display information about the partition table on
1392 bool "pci - Access PCI devices"
1394 Provide access to PCI (Peripheral Interconnect Bus), a type of bus
1395 used on some devices to allow the CPU to communicate with its
1396 peripherals. Sub-commands allow bus enumeration, displaying and
1397 changing configuration space and a few other features.
1400 bool "pci_mps - Configure PCI device MPS"
1403 Enables PCI Express Maximum Packet Size (MPS) tuning. This
1404 command configures the PCI Express MPS of each endpoint to the
1405 largest value supported by all devices below the root complex.
1406 The Maximum Read Request Size will not be altered. This method is
1407 the same algorithm as used by Linux pci=pcie_bus_safe.
1410 bool "pinmux - show pins muxing"
1412 default y if PINCTRL
1414 Parse all available pin-controllers and show pins muxing. This
1415 is useful for debug purpoer to check the pin muxing and to know if
1416 a pin is configured as a GPIO or as an alternate function.
1421 Poweroff/Shutdown the system
1424 bool "read - Read binary data from a partition"
1426 Provides low-level access to the data in a partition.
1428 config CMD_REMOTEPROC
1430 depends on REMOTEPROC
1432 Support for Remote Processor control
1435 bool "sata - Access SATA subsystem"
1438 SATA (Serial Advanced Technology Attachment) is a serial bus
1439 standard for connecting to hard drives and other storage devices.
1440 This command provides information about attached devices and allows
1441 reading, writing and other operations.
1443 SATA replaces PATA (originally just ATA), which stands for Parallel AT
1444 Attachment, where AT refers to an IBM AT (Advanced Technology)
1445 computer released in 1984.
1448 bool "scsi - Access to SCSI devices"
1451 This provides a 'scsi' command which provides access to SCSI (Small
1452 Computer System Interface) devices. The command provides a way to
1453 scan the bus, reset the bus, read and write data and get information
1457 bool "sdram - Print SDRAM configuration information"
1459 Provides information about attached SDRAM. This assumed that the
1460 SDRAM has an EEPROM with information that can be read using the
1461 I2C bus. This is only available on some boards.
1465 depends on DM_SPI_FLASH || SPI_FLASH
1466 default y if DM_SPI_FLASH
1471 bool "sf test - Allow testing of SPI flash"
1474 Provides a way to test that SPI flash is working correctly. The
1475 test is destructive, in that an area of SPI flash must be provided
1476 for the test to use. Performance information is also provided,
1477 measuring the performance of reading, writing and erasing in
1478 Mbps (Million Bits Per Second). This value should approximately
1479 equal the SPI bus speed for a single-bit-wide SPI bus, assuming
1480 everything is working properly.
1483 bool "sspi - Command to access spi device"
1486 SPI utility command.
1488 config DEFAULT_SPI_BUS
1489 int "default spi bus used by sspi command"
1493 config DEFAULT_SPI_MODE
1494 hex "default spi mode used by sspi command (see include/spi.h)"
1498 config CMD_TEMPERATURE
1499 bool "temperature - display the temperature from thermal sensors"
1500 depends on DM_THERMAL
1502 Provides a way to list thermal sensors and to get their readings.
1505 bool "tsi148 - Command to access tsi148 device"
1507 This provides various sub-commands to initialise and configure the
1508 Turndra tsi148 device. See the command help for full details.
1511 bool "Enable UFS - Universal Flash Subsystem commands"
1514 "This provides commands to initialise and configure universal flash
1518 bool "universe - Command to set up the Turndra Universe controller"
1520 This allows setting up the VMEbus provided by this controller.
1521 See the command help for full details.
1531 select USB_FUNCTION_SDP
1533 Enables the command "sdp" which is used to have U-Boot emulating the
1534 Serial Download Protocol (SDP) via USB.
1538 depends on USB_FUNCTION_ROCKUSB
1540 Rockusb protocol is widely used by Rockchip SoC based devices. It can
1541 read/write info, image to/from devices. This enable rockusb command
1542 support to communication with rockusb device. for more detail about
1543 this command, please read doc/README.rockusb.
1545 config CMD_USB_MASS_STORAGE
1546 bool "UMS usb mass storage"
1547 depends on USB_GADGET_DOWNLOAD
1548 select USB_FUNCTION_MASS_STORAGE
1549 depends on BLK && USB_GADGET
1551 Enables the command "ums" and the USB mass storage support to the
1552 export a block device: U-Boot, the USB device, acts as a simple
1553 external hard drive plugged on the host USB port.
1555 config CMD_UMS_ABORT_KEYED
1556 bool "UMS abort with any key"
1557 depends on CMD_USB_MASS_STORAGE
1559 Allow interruption of usb mass storage run with any key pressed.
1562 bool "Xen para-virtualized block device"
1566 Xen para-virtualized block device support
1573 VirtIO block device support
1579 This provides commands to control the watchdog timer devices.
1582 bool "write - Write binary data to a partition"
1584 Provides low-level write access to a partition.
1590 Enable the command "axi" for accessing AXI (Advanced eXtensible
1591 Interface) busses, a on-chip interconnect specification for managing
1592 functional blocks in SoC designs, which is also often used in designs
1593 involving FPGAs (e.g. communication with IP cores in Xilinx FPGAs).
1597 menu "Shell scripting commands"
1602 Print file to standard output
1608 Echo args to console
1614 Return true/false on integer compare.
1620 Run script from memory
1626 Evaluate boolean and math expressions and store the result in an env
1628 Also supports loading the value at a memory location into a variable.
1629 If CONFIG_REGEX is enabled, setexpr also supports a gsub function.
1631 config CMD_SETEXPR_FMT
1633 depends on CMD_SETEXPR
1635 Evaluate format string expression and store result in an environment
1640 menu "Android support commands"
1642 config CMD_AB_SELECT
1644 depends on ANDROID_AB
1646 On Android devices with more than one boot slot (multiple copies of
1647 the kernel and system images) this provides a command to select which
1648 slot should be used to boot from and register the boot attempt. This
1649 is used by the new A/B update model where one slot is updated in the
1650 background while running from the other slot.
1657 bool "Network commands"
1667 bootp - boot image via network using BOOTP/TFTP protocol
1671 depends on CMD_BOOTP
1673 Boot image via network using DHCP/TFTP protocol
1675 config BOOTP_MAY_FAIL
1676 bool "Allow for the BOOTP/DHCP server to not be found"
1677 depends on CMD_BOOTP
1679 If the DHCP server is not found after the configured retry count, the
1680 call will fail instead of starting over. This can be used to fail
1681 over to Link-local IP address configuration if the DHCP server is not
1684 config BOOTP_BOOTPATH
1685 bool "Request & store 'rootpath' from BOOTP/DHCP server"
1687 depends on CMD_BOOTP
1689 Even though the config is called BOOTP_BOOTPATH, it stores the
1690 path in the variable 'rootpath'.
1692 config BOOTP_VENDOREX
1693 bool "Support vendor extensions from BOOTP/DHCP server"
1694 depends on CMD_BOOTP
1696 config BOOTP_BOOTFILESIZE
1697 bool "Request & store 'bootfilesize' from BOOTP/DHCP server"
1698 depends on CMD_BOOTP
1701 bool "Request & store 'dnsip' from BOOTP/DHCP server"
1703 depends on CMD_BOOTP
1705 The primary DNS server is stored as 'dnsip'. If two servers are
1706 returned, you must set BOOTP_DNS2 to store that second server IP
1710 bool "Store 'dnsip2' from BOOTP/DHCP server"
1711 depends on BOOTP_DNS
1713 If a DHCP client requests the DNS server IP from a DHCP server,
1714 it is possible that more than one DNS serverip is offered to the
1715 client. If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS
1716 server IP will be stored in the additional environment
1717 variable "dnsip2". The first DNS serverip is always
1718 stored in the variable "dnsip", when BOOTP_DNS is defined.
1720 config BOOTP_GATEWAY
1721 bool "Request & store 'gatewayip' from BOOTP/DHCP server"
1723 depends on CMD_BOOTP
1725 config BOOTP_HOSTNAME
1726 bool "Request & store 'hostname' from BOOTP/DHCP server"
1728 depends on CMD_BOOTP
1730 The name may or may not be qualified with the local domain name.
1732 config BOOTP_PREFER_SERVERIP
1733 bool "serverip variable takes precedent over DHCP server IP."
1734 depends on CMD_BOOTP
1736 By default a BOOTP/DHCP reply will overwrite the 'serverip' variable.
1738 With this option enabled, the 'serverip' variable in the environment
1739 takes precedence over DHCP server IP and will only be set by the DHCP
1740 server if not already set in the environment.
1742 config BOOTP_SUBNETMASK
1743 bool "Request & store 'netmask' from BOOTP/DHCP server"
1745 depends on CMD_BOOTP
1747 config BOOTP_NISDOMAIN
1748 bool "Request & store 'nisdomain' from BOOTP/DHCP server"
1749 depends on CMD_BOOTP
1751 config BOOTP_NTPSERVER
1752 bool "Request & store 'ntpserverip' from BOOTP/DHCP server"
1753 depends on CMD_BOOTP
1755 config BOOTP_TIMEOFFSET
1756 bool "Request & store 'timeoffset' from BOOTP/DHCP server"
1757 depends on CMD_BOOTP && CMD_SNTP
1762 Selecting this will allow capturing all Ethernet packets and store
1763 them in physical memory in a PCAP formated file,
1764 later to be analyzed by PCAP reader application (IE. WireShark).
1767 bool "Send PXE client arch to BOOTP/DHCP server"
1769 depends on CMD_BOOTP && CMD_PXE
1771 Supported for ARM, ARM64, and x86 for now.
1773 config BOOTP_PXE_CLIENTARCH
1775 depends on BOOTP_PXE
1776 default 0x16 if ARM64
1780 config BOOTP_VCI_STRING
1782 depends on CMD_BOOTP
1783 default "U-Boot.armv7" if CPU_V7A || CPU_V7M || CPU_V7R
1784 default "U-Boot.armv8" if ARM64
1785 default "U-Boot.arm" if ARM
1792 tftpboot - load file via network using TFTP protocol
1796 depends on CMD_TFTPBOOT
1798 TFTP put command, for uploading files to a server
1802 depends on CMD_TFTPBOOT
1804 Act as a TFTP server and boot the first received file
1806 config NET_TFTP_VARS
1807 bool "Control TFTP timeout and count through environment"
1808 depends on CMD_TFTPBOOT
1811 If set, allows controlling the TFTP timeout through the
1812 environment variable tftptimeout, and the TFTP maximum
1813 timeout count through the variable tftptimeoutcountmax.
1814 If unset, timeout and maximum are hard-defined as 1 second
1815 and 10 timouts per TFTP transfer.
1820 Boot image via network using RARP/TFTP protocol
1826 Boot image via network using NFS protocol.
1829 int "Timeout in milliseconds for NFS mounts"
1833 Timeout in milliseconds used in NFS protocol. If you encounter
1834 "ERROR: Cannot umount" in nfs command, try longer timeout such as
1837 config SYS_DISABLE_AUTOLOAD
1838 bool "Disable automatically loading files over the network"
1839 depends on CMD_BOOTP || CMD_DHCP || CMD_NFS || CMD_RARP
1841 Typically, commands such as "dhcp" will attempt to automatically
1842 load a file from the network, once the initial network configuration
1843 is complete. Enable this option to disable this behavior and instead
1844 require files to be loaded over the network by subsequent commands.
1850 wget is a simple command to download kernel, or other files,
1851 from a http server over TCP.
1857 If set, allows 802.3(clause 22) MII Management functions interface access
1858 The management interface specified in Clause 22 provides
1859 a simple, two signal, serial interface to connect a
1860 Station Management entity and a managed PHY for providing access
1861 to management parameters and services.
1862 The interface is referred to as the MII management interface.
1865 bool "Call mii_init() in the mii command"
1866 depends on CMD_MII && (MPC8XX_FEC || FSLDMAFE || MCFFEC)
1872 If set, allows Enable 802.3(clause 45) MDIO interface registers access
1873 The MDIO interface is orthogonal to the MII interface and extends
1874 it by adding access to more registers through indirect addressing.
1879 Send ICMP ECHO_REQUEST to network host
1884 default y if (CMD_PING && IPV6)
1886 Send ICMPv6 ECHO_REQUEST to network host
1891 Perform CDP network configuration
1897 Synchronize RTC via network
1902 Lookup the IP of a hostname
1904 config CMD_LINK_LOCAL
1908 Acquire a network IP address using the link-local protocol
1914 Manually configure the attached NIC via NC-SI.
1915 Normally this happens automatically before other network
1923 Allow control of L2 Ethernet switch commands. These are supported
1924 by the vsc9953 Ethernet driver at present. Sub-commands allow
1925 operations such as enabling / disabling a port and
1926 viewing/maintaining the filtering database (FDB)
1932 Boot image via network using PXE protocol
1937 Wait for wake-on-lan Magic Packet
1941 menu "Misc commands"
1944 bool "Enable 'bmp' command"
1947 This provides a way to obtain information about a BMP-format image
1948 and to display it. BMP (which presumably stands for BitMaP) is a
1949 file format defined by Microsoft which supports images of various
1950 depths, formats and compression methods. Headers on the file
1951 determine the formats used. This command can be used by first loading
1952 the image into RAM, then using this command to look at it or display
1955 config CMD_BOOTCOUNT
1957 depends on BOOTCOUNT_LIMIT
1959 Enable the bootcount command, which allows interrogation and
1960 reset of the bootcounter.
1963 bool "Enable board-specific commands"
1965 (deprecated: instead, please define a Kconfig option for each command)
1967 Some boards have board-specific commands which are only enabled
1968 during developemnt and need to be turned off for production. This
1969 option provides a way to control this. The commands that are enabled
1970 vary depending on the board.
1972 config CMD_BLOCK_CACHE
1973 bool "blkcache - control and stats for block cache"
1974 depends on BLOCK_CACHE
1975 default y if BLOCK_CACHE
1977 Enable the blkcache command, which can be used to control the
1978 operation of the cache functions.
1979 This is most useful when fine-tuning the operation of the cache
1980 during development, but also allows the cache to be disabled when
1981 it might hurt performance (e.g. when using the ums command).
1988 Enable the 'button' command which allows to get the status of
1989 buttons supported by the board. The buttonss can be listed with
1990 'button list' and state can be known with 'button <label>'.
1991 Any button drivers can be controlled with this command, e.g.
1995 bool "icache or dcache"
1997 Enable the "icache" and "dcache" commands
1999 config CMD_CONITRACE
2000 bool "conitrace - trace console input codes"
2002 Enable the 'conitrace' command which displays the codes received
2003 from the console input as hexadecimal numbers.
2006 bool "Enable clear screen command 'cls'"
2007 default y if LCD || VIDEO
2009 Enable the 'cls' command which clears the screen contents
2010 on video frame buffer.
2013 bool "efidebug - display/configure UEFI environment"
2014 depends on EFI_LOADER
2015 select EFI_DEVICE_PATH_TO_TEXT
2017 Enable the 'efidebug' command which provides a subset of UEFI
2018 shell utility with simplified functionality. It will be useful
2019 particularly for managing boot parameters as well as examining
2020 various EFI status for debugging.
2022 config CMD_EFICONFIG
2023 bool "eficonfig - provide menu-driven uefi variables maintenance interface"
2024 default y if !HAS_BOARD_SIZE_LIMIT
2025 depends on CMD_BOOTEFI_BOOTMGR
2028 Enable the 'eficonfig' command which provides the menu-driven UEFI
2029 variable maintenance interface.
2031 config CMD_EXCEPTION
2032 bool "exception - raise exception"
2033 depends on ARM || RISCV || SANDBOX || X86
2035 Enable the 'exception' command which allows to raise an exception.
2042 Enable the 'led' command which allows for control of LEDs supported
2043 by the board. The LEDs can be listed with 'led list' and controlled
2044 with led on/off/togle/blink. Any LED drivers can be controlled with
2045 this command, e.g. led_gpio.
2050 Enable the 'ini' command which allows a .ini file to be parsed and
2051 placed into environment variables. Please check the source code for
2052 this as there is no documentation.
2059 Enable the 'date' command for getting/setting the time/date in RTC
2066 Enable the 'rtc' command for low-level access to RTC devices.
2071 Run commands and summarize execution time.
2074 bool "gettime - read elapsed time"
2076 Enable the 'gettime' command which reads the elapsed time since
2077 U-Boot started running. This shows the time in seconds and
2078 milliseconds. See also the 'bootstage' command which provides more
2079 flexibility for boot timing.
2082 bool "pause command"
2084 Delay execution waiting for any user input.
2085 Useful to allow the user to read a failure log.
2090 default y if SANDBOX
2093 Print bytes from the hardware random number generator.
2095 config CMD_KASLRSEED
2099 Set the kaslr-seed in the chosen node with entropy provided by a
2100 hardware random number generator.
2106 Delay execution for some time
2109 bool "support for multiprocessor commands"
2113 This enables commands to bringup different processors
2114 in multiprocessor cases.
2119 Access the system timer.
2125 This provides basic access to the U-Boot's sound support. The main
2126 feature is to play a beep.
2128 sound init - set up sound system
2129 sound play - play a sound
2135 Boot image via local extlinux.conf file
2141 This provides access to the QEMU firmware interface. The main
2142 feature is to allow easy loading of files passed to qemu-system
2143 via -kernel / -initrd
2148 This provides access to Linux PStore with Rammoops backend. The main
2149 feature is to allow to display or save PStore records.
2151 See doc/pstore.rst for more information.
2155 config CMD_PSTORE_MEM_ADDR
2156 hex "Memory Address"
2157 depends on CMD_PSTORE
2159 Base addr used for PStore ramoops memory, should be identical to
2160 ramoops.mem_address parameter used by kernel
2162 config CMD_PSTORE_MEM_SIZE
2164 depends on CMD_PSTORE
2167 Size of PStore ramoops memory, should be identical to ramoops.mem_size
2168 parameter used by kernel, a power of 2 and larger than the sum of the
2171 config CMD_PSTORE_RECORD_SIZE
2172 hex "Dump record size"
2173 depends on CMD_PSTORE
2176 Size of each dump done on oops/panic, should be identical to
2177 ramoops.record_size parameter used by kernel and a power of 2
2180 config CMD_PSTORE_CONSOLE_SIZE
2181 hex "Kernel console log size"
2182 depends on CMD_PSTORE
2185 Size of kernel console log, should be identical to
2186 ramoops.console_size parameter used by kernel and a power of 2
2189 config CMD_PSTORE_FTRACE_SIZE
2190 hex "FTrace log size"
2191 depends on CMD_PSTORE
2194 Size of ftrace log, should be identical to ramoops.ftrace_size
2195 parameter used by kernel and a power of 2
2197 config CMD_PSTORE_PMSG_SIZE
2198 hex "User space message log size"
2199 depends on CMD_PSTORE
2202 Size of user space message log, should be identical to
2203 ramoops.pmsg_size parameter used by kernel and a power of 2
2205 config CMD_PSTORE_ECC_SIZE
2207 depends on CMD_PSTORE
2210 if non-zero, the option enables ECC support and specifies ECC buffer
2211 size in bytes (1 is a special value, means 16 bytes ECC), should be
2212 identical to ramoops.ramoops_ecc parameter used by kernel
2216 source "cmd/mvebu/Kconfig"
2219 bool "terminal - provides a way to attach a serial terminal"
2221 Provides a 'cu'-like serial terminal command. This can be used to
2222 access other serial ports from the system console. The terminal
2223 is very simple with no special processing of characters. As with
2224 cu, you can press ~. (tilde followed by period) to exit.
2227 bool "uuid, guid - generation of unique IDs"
2230 This enables two commands:
2232 uuid - generate random Universally Unique Identifier
2233 guid - generate Globally Unique Identifier based on random UUID
2235 The two commands are very similar except for the endianness of the
2238 config CMD_VIDCONSOLE
2239 bool "lcdputs and setcurs"
2243 Enabling this will provide 'setcurs' and 'lcdputs' commands which
2244 support cursor positioning and drawing strings on the video
2245 console (framebuffer).
2247 The name 'lcdputs' is a bit of a misnomer, but so named because the
2248 video device is often an LCD.
2250 config CMD_SELECT_FONT
2251 bool "select font size"
2255 Enabling this will provide 'font' command.
2256 Allows font selection at runtime.
2260 source "cmd/ti/Kconfig"
2262 config CMD_BOOTSTAGE
2263 bool "Enable the 'bootstage' command"
2264 depends on BOOTSTAGE
2266 Add a 'bootstage' command which supports printing a report
2267 and un/stashing of bootstage data.
2269 menu "Power commands"
2271 bool "Enable Driver Model PMIC command"
2274 This is the pmic command, based on a driver model pmic's API.
2275 Command features are unchanged:
2276 - list - list pmic devices
2277 - pmic dev <id> - show or [set] operating pmic device (NEW)
2278 - pmic dump - dump registers
2279 - pmic read address - read byte of register at address
2280 - pmic write address - write byte to register at address
2281 The only one change for this command is 'dev' subcommand.
2283 config CMD_REGULATOR
2284 bool "Enable Driver Model REGULATOR command"
2285 depends on DM_REGULATOR
2287 This command is based on driver model regulator's API.
2288 User interface features:
2289 - list - list regulator devices
2290 - regulator dev <id> - show or [set] operating regulator device
2291 - regulator info - print constraints info
2292 - regulator status - print operating status
2293 - regulator value <val] <-f> - print/[set] voltage value [uV]
2294 - regulator current <val> - print/[set] current value [uA]
2295 - regulator mode <id> - print/[set] operating mode id
2296 - regulator enable - enable the regulator output
2297 - regulator disable - disable the regulator output
2299 The '-f' (force) option can be used for set the value which exceeds
2300 the limits, which are found in device-tree and are kept in regulator's
2301 uclass plat structure.
2305 menu "Security commands"
2307 bool "Enable the 'aes' command"
2310 This provides a means to encrypt and decrypt data using the AES
2311 (Advanced Encryption Standard). This algorithm uses a symetric key
2312 and is widely used as a streaming cipher. Different key lengths are
2313 supported by the algorithm but this command only supports 128 bits
2317 bool "Enable the 'blob' command"
2318 depends on !MX6ULL && !MX6SLL && !MX6SL
2319 select IMX_HAB if ARCH_MX6 || ARCH_MX7 || ARCH_MX7ULP || ARCH_IMX8M
2321 This is used with the Freescale secure boot mechanism.
2323 Freescale's SEC block has built-in Blob Protocol which provides
2324 a method for protecting user-defined data across system power
2325 cycles. SEC block protects data in a data structure called a Blob,
2326 which provides both confidentiality and integrity protection.
2328 Encapsulating data as a blob
2329 Each time that the Blob Protocol is used to protect data, a
2330 different randomly generated key is used to encrypt the data.
2331 This random key is itself encrypted using a key which is derived
2332 from SoC's non-volatile secret key and a 16 bit Key identifier.
2333 The resulting encrypted key along with encrypted data is called a
2334 blob. The non-volatile secure key is available for use only during
2337 During decapsulation, the reverse process is performed to get back
2341 blob enc - encapsulating data as a cryptgraphic blob
2342 blob dec - decapsulating cryptgraphic blob to get the data
2346 blob enc src dst len km
2348 Encapsulate and create blob of data $len bytes long
2349 at address $src and store the result at address $dst.
2350 $km is the 16 byte key modifier is also required for
2351 generation/use as key for cryptographic operation. Key
2352 modifier should be 16 byte long.
2354 blob dec src dst len km
2356 Decapsulate the blob of data at address $src and
2357 store result of $len byte at addr $dst.
2358 $km is the 16 byte key modifier is also required for
2359 generation/use as key for cryptographic operation. Key
2360 modifier should be 16 byte long.
2363 bool "Support 'hash' command"
2366 This provides a way to hash data in memory using various supported
2367 algorithms (such as SHA1, MD5, CRC32). The computed digest can be
2368 saved to memory or to an environment variable. It is also possible
2369 to verify a hash against data in memory.
2372 bool "Support the 'hvc' command"
2373 depends on ARM_SMCCC
2375 Allows issuing Hypervisor Calls (HVCs). Mostly useful for
2376 development and testing.
2379 bool "Support the 'smc' command"
2380 depends on ARM_SMCCC
2382 Allows issuing Secure Monitor Calls (SMCs). Mostly useful for
2383 development and testing.
2389 Add -v option to verify data against a hash.
2392 bool "scp03 - SCP03 enable and rotate/provision operations"
2395 This command provides access to a Trusted Application
2396 running in a TEE to request Secure Channel Protocol 03
2397 (SCP03) enablement and/or rotation of its SCP03 keys.
2406 bool "Enable the 'tpm' command"
2407 depends on TPM_V1 || TPM_V2
2408 select CMD_TPM_V1 if TPM_V1
2409 select CMD_TPM_V2 if TPM_V2
2411 This provides a means to talk to a TPM from the command line. A wide
2412 range of commands if provided - see 'tpm help' for details. The
2413 command requires a suitable TPM on your board and the correct driver
2419 bool "Enable the 'tpm test' command"
2422 This provides a a series of tests to confirm that the TPMv1.x is
2423 working correctly. The tests cover initialisation, non-volatile RAM,
2424 extend, global lock and checking that timing is within expectations.
2425 The tests pass correctly on Infineon TPMs but may need to be adjusted
2432 menu "Firmware commands"
2434 bool "Enable crosec command"
2438 Enable command-line access to the Chrome OS EC (Embedded
2439 Controller). This provides the 'crosec' command which has
2440 a number of sub-commands for performing EC tasks such as
2441 updating its flash, accessing a small saved context area
2442 and talking to the I2C bus behind the EC (if there is one).
2445 menu "Filesystem commands"
2447 bool "Enable the 'btrsubvol' command"
2450 This enables the 'btrsubvol' command to list subvolumes
2451 of a BTRFS filesystem. There are no special commands for
2452 listing BTRFS directories or loading BTRFS files - this
2453 can be done by the generic 'fs' commands (see CMD_FS_GENERIC)
2454 when BTRFS is enabled (see FS_BTRFS).
2457 bool "Enable the 'cbfs' command"
2460 Define this to enable support for reading from a Coreboot
2461 filesystem. This is a ROM-based filesystem used for accessing files
2462 on systems that use coreboot as the first boot-loader and then load
2463 U-Boot to actually boot the Operating System. Available commands are
2464 cbfsinit, cbfsinfo, cbfsls and cbfsload.
2467 bool "Enable the 'cramfs' command"
2468 depends on FS_CRAMFS
2470 This provides commands for dealing with CRAMFS (Compressed ROM
2471 filesystem). CRAMFS is useful when space is tight since files are
2472 compressed. Two commands are provided:
2474 cramfsls - lists files in a cramfs image
2475 cramfsload - loads a file from a cramfs image
2478 bool "EROFS command support"
2481 Support for the EROFS fs
2484 bool "ext2 command support"
2487 Enables EXT2 FS command
2490 bool "ext4 command support"
2493 Enables EXT4 FS command
2495 config CMD_EXT4_WRITE
2497 bool "ext4 write command support"
2500 Enables EXT4 FS write command
2503 bool "FAT command support"
2506 Support for the FAT fs
2509 bool "SquashFS command support"
2512 Enables SquashFS filesystem commands (e.g. load, ls).
2514 config CMD_FS_GENERIC
2515 bool "filesystem commands"
2517 Enables filesystem commands (e.g. load, ls) that work for multiple
2521 bool "fsuuid command"
2523 Enables fsuuid command for filesystem UUID.
2526 bool "jffs2 command"
2529 Enables commands to support the JFFS2 (Journalling Flash File System
2530 version 2) filesystem. This enables fsload, ls and fsinfo which
2531 provide the ability to load files, list directories and obtain
2532 filesystem information.
2535 string "Default device for JFFS2"
2536 depends on CMD_JFFS2
2539 The default device to use with the jffs2 command.
2541 config JFFS2_PART_OFFSET
2542 hex "Default offset within flash to locate the JFFS2 image"
2543 depends on CMD_JFFS2
2546 The default offset within flash to locate the JFFS2 image.
2548 config JFFS2_PART_SIZE
2549 hex "Default size of JFFS2 partition"
2550 depends on CMD_JFFS2
2553 The default size of the JFFS2 partition
2556 bool "MTD partition support"
2559 MTD partitioning tool support.
2560 It is strongly encouraged to avoid using this command
2561 anymore along with 'sf', 'nand', 'onenand'. One can still
2562 declare the partitions in the mtdparts environment variable
2563 but better use the MTD stack and the 'mtd' command instead.
2565 config CMD_MTDPARTS_SPREAD
2566 bool "Padd partition size to take account of bad blocks"
2567 depends on CMD_MTDPARTS
2569 This enables the 'spread' sub-command of the mtdparts command.
2570 This command will modify the existing mtdparts variable by increasing
2571 the size of the partitions such that 1) each partition's net size is
2572 at least as large as the size specified in the mtdparts variable and
2573 2) each partition starts on a good block.
2575 config CMD_MTDPARTS_SHOW_NET_SIZES
2576 bool "Show net size (w/o bad blocks) of partitions"
2577 depends on CMD_MTDPARTS
2579 Adds two columns to the printed partition table showing the
2580 effective usable size of a partition, if bad blocks are taken
2583 config MTDIDS_DEFAULT
2584 string "Default MTD IDs"
2585 depends on MTD || SPI_FLASH
2586 depends on !SYS_MTDPARTS_RUNTIME
2588 Defines a default MTD IDs list for use with MTD partitions in the
2589 Linux MTD command line partitions format.
2591 config MTDPARTS_DEFAULT
2592 string "Default MTD partition scheme"
2593 depends on MTD || SPI_FLASH
2594 depends on !SYS_MTDPARTS_RUNTIME
2596 Defines a default MTD partitioning scheme in the Linux MTD command
2597 line partitions format
2600 bool "reiser - Access to reiserfs filesystems"
2602 This provides two commands which operate on a resierfs filesystem,
2603 commonly used some years ago:
2605 reiserls - list files
2606 reiserload - load a file
2609 bool "yaffs2 - Access of YAFFS2 filesystem"
2613 This provides commands for accessing a YAFFS2 filesystem. Yet
2614 Another Flash Filesystem 2 is a filesystem designed specifically
2615 for NAND flash. It incorporates bad-block management and ensures
2616 that device writes are sequential regardless of filesystem
2620 bool "zfs - Access of ZFS filesystem"
2622 This provides commands to accessing a ZFS filesystem, commonly used
2623 on Solaris systems. Two sub-commands are provided:
2625 zfsls - list files in a directory
2626 zfsload - load a file
2628 See doc/README.zfs for more details.
2632 menu "Debug commands"
2634 config CMD_CBSYSINFO
2637 default y if SYS_COREBOOT
2639 This provides information about the coreboot sysinfo table stored in
2640 memory by coreboot before jumping to U-Boot. It can be useful for
2641 debugging the beaaviour of coreboot or U-Boot.
2644 bool "cyclic - Show information about cyclic functions"
2648 This enables the 'cyclic' command which provides information about
2649 cyclic execution functions. This infrastructure allows registering
2650 functions to be executed cyclically, e.g. every 100ms. These commands
2653 cyclic list - list cyclic functions
2654 cyclic cyclic demo <cycletime_ms> <delay_us> - register cyclic
2657 See doc/develop/cyclic.rst for more details.
2660 bool "diag - Board diagnostics"
2662 This command provides access to board diagnostic tests. These are
2663 called Power-on Self Tests (POST). The command allows listing of
2664 available tests and running either all the tests, or specific tests
2668 bool "event - Show information about events"
2670 default y if EVENT_DEBUG
2672 This enables the 'event' command which provides information about
2673 events and event-handler routines. This can help to device event
2677 bool "irq - Show information about interrupts"
2678 depends on !ARM && !MIPS && !RISCV && !SH
2680 This enables two commands:
2682 interrupts - enable or disable interrupts
2683 irqinfo - print device-specific interrupt information
2686 bool "kgdb - Allow debugging of U-Boot with gdb"
2689 This enables a 'kgdb' command which allows gdb to connect to U-Boot
2690 over a serial link for debugging purposes. This allows
2691 single-stepping, inspecting variables, etc. This is supported only
2692 on PowerPC at present.
2695 bool "log - Generation, control and access to logging"
2699 This provides access to logging features. It allows the output of
2700 log data to be controlled to a limited extent (setting up the default
2701 maximum log level for emitting of records). It also provides access
2702 to a command used for testing the log system.
2705 bool "trace - Support tracing of function calls and timing"
2709 Enables a command to control using of function tracing within
2710 U-Boot. This allows recording of call traces including timing
2711 information. The command can write data to memory for exporting
2712 for analysis (e.g. using bootchart). See doc/README.trace for full
2716 bool "avb - Android Verified Boot 2.0 operations"
2717 depends on AVB_VERIFY
2719 Enables a "avb" command to perform verification of partitions using
2720 Android Verified Boot 2.0 functionality. It includes such subcommands:
2721 avb init - initialize avb2 subsystem
2722 avb read_rb - read rollback index
2723 avb write_rb - write rollback index
2724 avb is_unlocked - check device lock state
2725 avb get_uuid - read and print uuid of a partition
2726 avb read_part - read data from partition
2727 avb read_part_hex - read data from partition and output to stdout
2728 avb write_part - write data to partition
2729 avb verify - run full verification chain
2731 config CMD_STACKPROTECTOR_TEST
2732 bool "Test command for stack protector"
2733 depends on STACKPROTECTOR
2735 Enable stackprot_test command
2736 The stackprot_test command will force a stack overrun to test
2737 the stack smashing detection mechanisms.
2742 tristate "Enable UBI - Unsorted block images commands"
2745 UBI is a software layer above MTD layer which admits use of LVM-like
2746 logical volumes on top of MTD devices, hides some complexities of
2747 flash chips like wear and bad blocks and provides some other useful
2748 capabilities. Please, consult the MTD web site for more details
2749 (www.linux-mtd.infradead.org). Activate this option if you want
2750 to use U-Boot UBI commands.
2751 It is also strongly encouraged to also enable CONFIG_MTD to get full
2754 config CMD_UBI_RENAME
2755 bool "Enable rename"
2758 Enable a "ubi" command to rename ubi volume:
2759 ubi rename <oldname> <newname>
2762 tristate "Enable UBIFS - Unsorted block images filesystem commands"
2764 default y if CMD_UBI
2768 UBIFS is a file system for flash devices which works on top of UBI.
2770 config MMC_SPEED_MODE_SET
2771 bool "set speed mode using mmc command"
2775 Enable setting speed mode using mmc rescan and mmc dev commands.
2776 The speed mode is provided as the last argument in these commands
2777 and is indicated using the index from enum bus_mode in
2778 include/mmc.h. A speed mode can be set only if it has already
2779 been enabled in the device tree.
2782 bool "Amlogic Meson commands"
2783 depends on ARCH_MESON
2786 Enable useful commands for the Meson Soc family developed by Amlogic Inc.
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