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.
169 Print GPL license text
174 Provides access to the Intel Power-Management Controller (PMC) so
175 that its state can be examined. This does not currently support
176 changing the state but it is still useful for debugging and seeing
185 config CMD_TLV_EEPROM
187 depends on I2C_EEPROM
190 Display and program the system EEPROM data block in ONIE Tlvinfo
191 format. TLV stands for Type-Length-Value.
193 config SPL_CMD_TLV_EEPROM
194 bool "tlv_eeprom for SPL"
195 depends on SPL_I2C_EEPROM
196 select SPL_DRIVERS_MISC
199 Read system EEPROM data block in ONIE Tlvinfo format from SPL.
203 depends on RISCV_SMODE && SBI_V02
205 Display information about the SBI implementation.
215 Run the command stored in the environment "bootcmd", i.e.
216 "bootd" does the same thing as "run bootcmd".
222 Boot an application image from the memory.
224 config CMD_BOOTM_PRE_LOAD
225 bool "enable pre-load on bootm"
227 depends on IMAGE_PRE_LOAD
230 Enable support of stage pre-load for the bootm command.
231 This stage allow to check or modify the image provided
232 to the bootm command.
237 default y if BOOTSTD_FULL
239 Support listing available bootdevs (boot devices) which can provide an
240 OS to boot, as well as showing information about a particular one.
242 This command is not necessary for bootstd to work.
249 Support scanning for bootflows available with the bootdevs. The
250 bootflows can optionally be booted.
252 config CMD_BOOTFLOW_FULL
253 bool "bootflow - extract subcommands"
254 depends on BOOTSTD_FULL
255 default y if BOOTSTD_FULL
257 Add the ability to list the available bootflows, select one and obtain
258 information about it.
260 This command is not necessary for bootstd to work.
265 default y if BOOTSTD_FULL
267 Support listing available bootmethds (methods used to boot an
268 Operating System), as well as selecting the order that the bootmeths
271 This command is not necessary for bootstd to work.
274 bool "Support booting UEFI FIT images"
275 depends on CMD_BOOTEFI && CMD_BOOTM && FIT
278 Support booting UEFI FIT images via the bootm command.
283 Boot the Linux zImage
287 depends on ARM64 || RISCV
290 Boot an AArch64 Linux Kernel image from memory.
293 bool "Support booting Linux OS images"
294 depends on CMD_BOOTM || CMD_BOOTZ || CMD_BOOTI
297 Support booting the Linux kernel directly via a command such as bootm
301 bool "Support booting NetBSD (non-EFI) loader images"
305 Support booting NetBSD via the bootm command.
307 config BOOTM_OPENRTOS
308 bool "Support booting OPENRTOS / FreeRTOS images"
311 Support booting OPENRTOS / FreeRTOS via the bootm command.
314 bool "Support booting Enea OSE images"
315 depends on (ARM && (ARM64 || CPU_V7A || CPU_V7R) || SANDBOX || PPC || X86)
318 Support booting Enea OSE images via the bootm command.
321 bool "Support booting Plan9 OS images"
325 Support booting Plan9 images via the bootm command.
328 bool "Support booting RTEMS OS images"
332 Support booting RTEMS images via the bootm command.
335 bool "vbe - Verified Boot for Embedded"
336 depends on BOOTMETH_VBE
337 default y if BOOTSTD_FULL
339 Provides various subcommands related to VBE, such as listing the
340 available methods, looking at the state and changing which method
341 is used to boot. Updating the parameters is not currently
345 bool "Support booting VxWorks OS images"
349 Support booting VxWorks images via the bootm command.
352 hex "Maximum size of a decompresed OS image"
353 depends on CMD_BOOTM || CMD_BOOTI || CMD_BOOTZ
354 default 0x4000000 if PPC || ARM64
355 default 0x1000000 if X86 || ARCH_MX6 || ARCH_MX7
358 This is the maximum size of the buffer that is used to decompress the OS
359 image in to, if passing a compressed image to bootm/booti/bootz.
363 depends on EFI_LOADER
366 Boot an EFI image from memory.
368 config CMD_BOOTEFI_HELLO_COMPILE
369 bool "Compile a standard EFI hello world binary for testing"
370 depends on CMD_BOOTEFI && !CPU_V7M
373 This compiles a standard EFI hello world application with U-Boot so
374 that it can be used with the test/py testing framework. This is useful
375 for testing that EFI is working at a basic level, and for bringing
376 up EFI support on a new architecture.
378 No additional space will be required in the resulting U-Boot binary
379 when this option is enabled.
381 config CMD_BOOTEFI_HELLO
382 bool "Allow booting a standard EFI hello world for testing"
383 depends on CMD_BOOTEFI_HELLO_COMPILE
384 default y if CMD_BOOTEFI_SELFTEST
386 This adds a standard EFI hello world application to U-Boot so that
387 it can be used with the 'bootefi hello' command. This is useful
388 for testing that EFI is working at a basic level, and for bringing
389 up EFI support on a new architecture.
391 source lib/efi_selftest/Kconfig
398 Add an ANSI terminal boot menu command.
403 Android DTB/DTBO image manipulation commands. Read dtb/dtbo files from
404 image into RAM, dump image structure information, etc. Those dtb/dtbo
405 files should be merged in one dtb further, which needs to be passed to
406 the kernel, as part of a boot process.
410 depends on ANDROID_BOOT_IMAGE
412 Android Boot Image manipulation commands. Allows one to extract
413 images contained in boot.img, like kernel, ramdisk, dtb, etc, and
414 obtain corresponding meta-information from boot.img.
416 See doc/android/boot-image.rst for details.
419 bool "bootelf, bootvx"
423 Boot an ELF/vxWorks image from the memory.
426 bool "Flattened Device Tree utility commands"
430 Do FDT related setup before booting into the Operating System.
432 config SUPPORT_EXTENSION_SCAN
436 bool "Extension board management command"
438 depends on SUPPORT_EXTENSION_SCAN
440 Enables the "extension" command, which allows to detect
441 extension boards connected to the system, and apply
442 corresponding Device Tree overlays.
448 Start an application at a given address.
454 Run the command in the given environment variable.
460 Print header information for application image.
465 List all images found in flash
471 Extract a part of a multi-image.
476 Print file as hexdump to standard output
479 bool "spl export - Export boot information for Falcon boot"
482 Falcon mode allows booting directly from SPL into an Operating
483 System such as Linux, thus skipping U-Boot proper. See
484 doc/README.falcon for full information about how to use this
487 config CMD_SPL_NAND_OFS
488 hex "Offset of OS args or dtb for Falcon-mode NAND boot"
489 depends on CMD_SPL && (TPL_NAND_SUPPORT || SPL_NAND_SUPPORT)
492 This provides the offset of the command line arguments for Linux
493 when booting from NAND in Falcon mode. See doc/README.falcon
494 for full information about how to use this option (and also see
495 board/gateworks/gw_ventana/README for an example).
497 config CMD_SPL_NOR_OFS
498 hex "Offset of OS args or dtb for Falcon-mode NOR boot"
499 depends on CMD_SPL && SPL_NOR_SUPPORT
502 This provides the offset of the command line arguments or dtb for
503 Linux when booting from NOR in Falcon mode.
505 config CMD_SPL_WRITE_SIZE
506 hex "Size of argument area"
510 This provides the size of the command-line argument area in NAND
511 flash used by Falcon-mode boot. See the documentation until CMD_SPL
514 config CMD_THOR_DOWNLOAD
515 bool "thor - TIZEN 'thor' download"
518 Implements the 'thor' download protocol. This is a way of
519 downloading a software update over USB from an attached host.
520 There is no documentation about this within the U-Boot source code
521 but you should be able to find something on the interwebs.
524 bool "zboot - x86 boot command"
526 With x86 machines it is common to boot a bzImage file which
527 contains both a kernel and a setup.bin file. The latter includes
528 configuration information from the dark ages which x86 boards still
529 need to pick things out of.
531 Consider using FIT in preference to this since it supports directly
532 booting both 32- and 64-bit kernels, as well as secure boot.
533 Documentation is available in doc/uImage.FIT/x86-fit-boot.txt
537 menu "Environment commands"
540 bool "ask for env variable"
542 Ask for environment variable
560 Edit environment variable.
565 Allow for searching environment variables
571 Save all environment variables into the compiled-in persistent
576 depends on CMD_SAVEENV
578 Erase environment variables from the compiled-in persistent
581 config CMD_ENV_EXISTS
585 Check if a variable is defined in the environment for use in
588 config CMD_ENV_CALLBACK
589 bool "env callbacks - print callbacks and their associated variables"
591 Some environment variable have callbacks defined by
592 U_BOOT_ENV_CALLBACK. These are called when the variable changes.
593 For example changing "baudrate" adjust the serial baud rate. This
594 command lists the currently defined callbacks.
597 bool "env flags -print variables that have non-default flags"
599 Some environment variables have special flags that control their
600 behaviour. For example, serial# can only be written once and cannot
601 be deleted. This command shows the variables that have special
604 config CMD_NVEDIT_EFI
605 bool "env [set|print] -e - set/print UEFI variables"
606 depends on EFI_LOADER
609 UEFI variables are encoded as some form of U-Boot variables.
610 If enabled, we are allowed to set/print UEFI variables using
611 "env" command with "-e" option without knowing details.
613 config CMD_NVEDIT_INDIRECT
614 bool "env indirect - Sets environment value from another"
616 config CMD_NVEDIT_INFO
617 bool "env info - print or evaluate environment information"
619 Print environment information:
620 - env_valid : is environment valid
621 - env_ready : is environment imported into hash table
622 - env_use_default : is default environment used
624 This command can be optionally used for evaluation in scripts:
625 [-d] : evaluate whether default environment is used
626 [-p] : evaluate whether environment can be persisted
628 The result of multiple evaluations will be combined with AND.
630 config CMD_NVEDIT_LOAD
633 Load all environment variables from the compiled-in persistent
636 config CMD_NVEDIT_SELECT
639 Select the compiled-in persistent storage of environment variables.
643 menu "Memory commands"
648 Compute binary operations (xor, or, and) of byte arrays of arbitrary
649 size from memory and store the result in memory or the environment.
653 default y if BLOBLIST
655 Show information about the bloblist, a collection of binary blobs
656 held in memory that persist between SPL and U-Boot. In the case of
657 x86 devices the bloblist can be used to hold ACPI tables so that they
658 remain available in memory.
671 Add -v option to verify data against a crc32 checksum.
674 bool "eeprom - EEPROM subsystem"
676 (deprecated, needs conversion to driver model)
677 Provides commands to read and write EEPROM (Electrically Erasable
678 Programmable Read Only Memory) chips that are connected over an
681 config CMD_EEPROM_LAYOUT
682 bool "Enable layout-aware eeprom commands"
683 depends on CMD_EEPROM
685 (deprecated, needs conversion to driver model)
686 When enabled, additional eeprom sub-commands become available.
688 eeprom print - prints the contents of the eeprom in a human-readable
689 way (eeprom layout fields, and data formatted to be fit for human
692 eeprom update - allows user to update eeprom fields by specifying
693 the field name, and providing the new data in a human readable format
694 (same format as displayed by the eeprom print command).
696 Both commands can either auto detect the layout, or be told which
700 __weak int parse_layout_version(char *str)
701 - override to provide your own layout name parsing
702 __weak void __eeprom_layout_assign(struct eeprom_layout *layout,
704 - override to setup the layout metadata based on the version
705 __weak int eeprom_layout_detect(unsigned char *data)
706 - override to provide your own algorithm for detecting layout
709 - contains various printing and updating functions for common
710 types of eeprom fields. Can be used for defining
713 config EEPROM_LAYOUT_HELP_STRING
714 string "Tells user what layout names are supported"
715 depends on CMD_EEPROM_LAYOUT
716 default "<not defined>"
718 Help printed with the LAYOUT VERSIONS part of the 'eeprom'
721 config SYS_I2C_EEPROM_BUS
722 int "I2C bus of the EEPROM device."
723 depends on CMD_EEPROM
726 config SYS_I2C_EEPROM_ADDR_LEN
727 int "Length in bytes of the EEPROM memory array address"
728 depends on CMD_EEPROM || ID_EEPROM
732 Note: This is NOT the chip address length!
734 config SYS_EEPROM_SIZE
735 depends on CMD_EEPROM
736 int "Size in bytes of the EEPROM device"
739 config SYS_EEPROM_PAGE_WRITE_BITS
740 int "Number of bits used to address bytes in a single page"
741 depends on CMD_EEPROM
744 The EEPROM page size is 2^SYS_EEPROM_PAGE_WRITE_BITS.
745 A 64 byte page, for example would require six bits.
747 config SYS_EEPROM_PAGE_WRITE_DELAY_MS
748 int "Number of milliseconds to delay between page writes"
749 depends on CMD_EEPROM || CMD_I2C
755 Infinite write loop on address range
761 Compute MD5 checksum.
765 depends on CMD_MD5SUM
767 Add -v option to verify data against an MD5 checksum.
772 Display memory information.
775 bool "md, mm, nm, mw, cp, cmp, base, loop"
780 mm - memory modify (auto-incrementing address)
781 nm - memory modify (constant address)
782 mw - memory write (fill)
785 base - print or set address offset
786 loop - initialize loop on address range
788 config CMD_MEM_SEARCH
789 bool "ms - Memory search"
791 Memory-search command
793 This allows searching through a region of memory looking for hex
794 data (byte, 16-bit word, 32-bit long, also 64-bit on machines that
795 support it). It is also possible to search for a string. The
796 command accepts a memory range and a list of values to search for.
797 The values need to appear in memory in the same order they are given
798 in the command. At most 10 matches can be returned at a time, but
799 pressing return will show the next 10 matches. Environment variables
800 are set for use with scripting (memmatches, memaddr, mempos).
803 bool "Enable cyclic md/mw commands"
804 depends on CMD_MEMORY
806 Add the "mdc" and "mwc" memory commands. These are cyclic
811 This command will print 4 bytes (10,11,12,13) each 500 ms.
813 => mwc.l 100 12345678 10
814 This command will write 12345678 to address 100 all 10 ms.
819 depends on CMD_MEMORY && (LIB_RAND || LIB_HW_RAND)
821 random - fill memory with random data
826 Simple RAM read/write test.
830 config SYS_ALT_MEMTEST
831 bool "Alternative test"
833 Use a more complete alternative memory test.
837 config SYS_ALT_MEMTEST_BITFLIP
841 The alternative memory test includes bitflip test since 2020.07.
842 The bitflip test significantly increases the overall test time.
843 Bitflip test can optionally be disabled here.
847 config SYS_MEMTEST_START
848 hex "default start address for mtest"
851 This is the default start address for mtest for simple read/write
852 test. If no arguments are given to mtest, default address is used
855 config SYS_MEMTEST_END
856 hex "default end address for mtest"
859 This is the default end address for mtest for simple read/write
860 test. If no arguments are given to mtest, default address is used
869 Compute SHA1 checksum.
871 config SHA1SUM_VERIFY
873 depends on CMD_SHA1SUM
875 Add -v option to verify data against a SHA1 checksum.
878 bool "strings - display strings in memory"
880 This works similarly to the Unix 'strings' command except that it
881 works with a memory range. String of printable characters found
882 within the range are displayed. The minimum number of characters
883 for a sequence to be considered a string can be provided.
887 menu "Compression commands"
891 default y if CMD_BOOTI
894 Support decompressing an LZMA (Lempel-Ziv-Markov chain algorithm)
899 default y if CMD_BOOTI
902 Support decompressing an LZ4 image from memory region.
906 default y if CMD_BOOTI
909 Uncompress a zip-compressed memory region.
913 select GZIP_COMPRESSED
915 Compress a memory region with zlib deflate method.
919 menu "Device access commands"
922 #depends on FLASH_CFI_DRIVER
925 ARM Ltd reference designs flash partition access
928 bool "adc - Access Analog to Digital Converters info and data"
930 depends on DM_REGULATOR
932 Shows ADC device info and permit printing one-shot analog converted
933 data from a named Analog to Digital Converter.
938 depends on PARTITIONS
940 Read/modify/write the fields of Bootloader Control Block, usually
941 stored on the flash "misc" partition with its structure defined in:
942 https://android.googlesource.com/platform/bootable/recovery/+/master/
943 bootloader_message/include/bootloader_message/bootloader_message.h
945 Some real-life use-cases include (but are not limited to):
946 - Determine the "boot reason" (and act accordingly):
947 https://source.android.com/devices/bootloader/boot-reason
948 - Get/pass a list of commands from/to recovery:
949 https://android.googlesource.com/platform/bootable/recovery
950 - Inspect/dump the contents of the BCB fields
953 bool "bind/unbind - Bind or unbind a device to/from a driver"
956 Bind or unbind a device to/from a driver from the command line.
957 This is useful in situations where a device may be handled by several
958 drivers. For example, this can be used to bind a UDC to the usb ether
959 gadget driver from the command line.
962 bool "clk - Show clock frequencies"
965 Shows clock frequences by calling a sock_clk_dump() hook function.
966 This is depreated in favour of using the CLK uclass and accessing
967 clock values from associated drivers. However currently no command
971 bool "demo - Demonstration commands for driver model"
974 Provides a 'demo' command which can be used to play around with
975 driver model. To use this properly you will need to enable one or
976 both of the demo devices (DM_DEMO_SHAPE and DM_DEMO_SIMPLE).
977 Otherwise you will always get an empty list of devices. The demo
978 devices are defined in the sandbox device tree, so the easiest
979 option is to use sandbox and pass the -d point to sandbox's
986 Enables the command "dfu" which is used to have U-Boot create a DFU
987 class device via USB. This command requires that the "dfu_alt_info"
988 environment variable be set and define the alt settings to expose to
992 bool "dm - Access to driver model information"
995 Provides access to driver model data structures and information,
996 such as a list of devices, list of uclasses and the state of each
997 device (e.g. activated). This is not required for operation, but
998 can be useful to see the state of driver model for debugging or
1002 bool "fastboot - Android fastboot support"
1005 This enables the command "fastboot" which enables the Android
1006 fastboot mode for the platform. Fastboot is a protocol for
1007 downloading images, flashing and device control used on
1008 Android devices. Fastboot requires either the network stack
1009 enabled or support for acting as a USB device.
1011 See doc/android/fastboot.rst for more information.
1014 bool "flinfo, erase, protect"
1016 depends on MTD || FLASH_CFI_DRIVER || MTD_NOR_FLASH
1019 flinfo - print FLASH memory information
1020 erase - FLASH memory
1021 protect - enable or disable FLASH write protection
1030 config CMD_FPGA_LOADBP
1031 bool "fpga loadbp - load partial bitstream (Xilinx only)"
1034 Supports loading an FPGA device from a bitstream buffer containing
1035 a partial bitstream.
1037 config CMD_FPGA_LOADFS
1038 bool "fpga loadfs - load bitstream from FAT filesystem (Xilinx only)"
1041 Supports loading an FPGA device from a FAT filesystem.
1043 config CMD_FPGA_LOADMK
1044 bool "fpga loadmk - load bitstream from image"
1047 Supports loading an FPGA device from a image generated by mkimage.
1049 config CMD_FPGA_LOADP
1050 bool "fpga loadp - load partial bitstream"
1053 Supports loading an FPGA device from a bitstream buffer containing
1054 a partial bitstream.
1056 config CMD_FPGA_LOAD_SECURE
1057 bool "fpga loads - loads secure bitstreams"
1059 select FPGA_LOAD_SECURE
1061 Enables the fpga loads command which is used to load secure
1062 (authenticated or encrypted or both) bitstreams on to FPGA.
1065 bool "fpgad - dump FPGA registers"
1067 (legacy, needs conversion to driver model)
1068 Provides a way to dump FPGA registers by calling the board-specific
1069 fpga_get_reg() function. This functions similarly to the 'md'
1073 bool "fuse - support for the fuse subssystem"
1075 (deprecated - needs conversion to driver model)
1076 This allows reading, sensing, programming or overriding fuses
1077 which control the behaviour of the device. The command uses the
1085 config CMD_GPIO_READ
1086 bool "gpio read - save GPIO value to variable"
1089 Enables the 'gpio read' command that saves the value
1090 of a GPIO pin to a variable.
1096 Control PWM channels, this allows invert/config/enable/disable PWM channels.
1099 bool "GPT (GUID Partition Table) command"
1100 select EFI_PARTITION
1101 select PARTITION_UUIDS
1104 Enable the 'gpt' command to ready and write GPT style partition
1108 bool "GPT Random UUID generation"
1111 Enable the generation of partitions with random UUIDs if none
1114 config CMD_GPT_RENAME
1115 bool "GPT partition renaming commands"
1118 Enables the 'gpt' command to interchange names on two GPT
1119 partitions via the 'gpt swap' command or to rename single
1120 partitions via the 'rename' command.
1123 bool "ide - Support for IDE drivers"
1126 Provides an 'ide' command which allows accessing the IDE drive,
1127 resetting the IDE interface, printing the partition table and
1128 geting device info. It also enables the 'diskboot' command which
1129 permits booting from an IDE drive.
1132 bool "io - Support for performing I/O accesses"
1134 Provides an 'iod' command to display I/O space and an 'iow' command
1135 to write values to the I/O space. This can be useful for manually
1136 checking the state of devices during boot when debugging device
1140 bool "iotrace - Support for tracing I/O activity"
1142 Provides an 'iotrace' command which supports recording I/O reads and
1143 writes in a trace buffer in memory . It also maintains a checksum
1144 of the trace records (even if space is exhausted) so that the
1145 sequence of I/O accesses can be verified.
1147 When debugging drivers it is useful to see what I/O accesses were
1148 done and in what order.
1150 Even if the individual accesses are of little interest it can be
1151 useful to verify that the access pattern is consistent each time
1152 an operation is performed. In this case a checksum can be used to
1153 characterise the operation of a driver. The checksum can be compared
1154 across different runs of the operation to verify that the driver is
1157 In particular, when performing major refactoring of the driver, where
1158 the access pattern should not change, the checksum provides assurance
1159 that the refactoring work has not broken the driver.
1161 This works by sneaking into the io.h heder for an architecture and
1162 redirecting I/O accesses through iotrace's tracing mechanism.
1164 For now no commands are provided to examine the trace buffer. The
1165 format is fairly simple, so 'md' is a reasonable substitute.
1167 Note: The checksum feature is only useful for I/O regions where the
1168 contents do not change outside of software control. Where this is not
1169 suitable you can fall back to manually comparing the addresses. It
1170 might be useful to enhance tracing to only checksum the accesses and
1171 not the data read/written.
1181 bool "w1 - Support for Dallas 1-Wire protocol"
1183 Dallas 1-wire protocol support
1189 Load a binary file over serial line.
1194 Load a binary over memory mapped.
1200 Load an S-Record file over serial line
1202 config CMD_LOADXY_TIMEOUT
1203 int "loadxy_timeout"
1207 Initial timeout for loadx and loady commands. Zero means infinity.
1211 bool "lsblk - list block drivers and devices"
1213 Print list of available block device drivers, and for each, the list
1214 of known block devices.
1217 bool "MBR (Master Boot Record) command"
1218 select DOS_PARTITION
1220 Enable the 'mbr' command to ready and write MBR (Master Boot Record)
1221 style partition tables.
1227 Enable the command "misc" for accessing miscellaneous devices with
1228 a MISC uclass driver. The command provides listing all MISC devices
1229 as well as read and write functionalities via their drivers.
1235 MMC memory mapped support.
1239 config CMD_BKOPS_ENABLE
1240 bool "mmc bkops enable"
1243 Enable command for setting manual background operations handshake
1244 on a eMMC device. The feature is optionally available on eMMC devices
1245 conforming to standard >= 4.41.
1248 bool "Enable support for RPMB in the mmc command"
1249 depends on SUPPORT_EMMC_RPMB
1251 Enable the commands for reading, writing and programming the
1252 key for the Replay Protection Memory Block partition in eMMC.
1254 config CMD_MMC_SWRITE
1256 depends on MMC_WRITE
1259 Enable support for the "mmc swrite" command to write Android sparse
1268 Enable storage cloning over block devices, useful for
1269 initial flashing by external block device without network
1272 config CMD_OPTEE_RPMB
1273 bool "Enable read/write support on RPMB via OPTEE"
1274 depends on SUPPORT_EMMC_RPMB && OPTEE
1276 Enable the commands for reading, writing persistent named values
1277 in the Replay Protection Memory Block partition in eMMC by
1278 using Persistent Objects in OPTEE
1283 select MTD_PARTITIONS
1285 MTD commands support.
1289 depends on MULTIPLEXER
1291 List, select, and deselect mux controllers on the fly.
1295 default y if NAND_SUNXI
1296 depends on MTD_RAW_NAND
1301 config CMD_NAND_TRIMFFS
1302 bool "nand write.trimffs"
1303 default y if ARCH_SUNXI
1305 Allows one to skip empty pages when flashing something on a NAND.
1307 config CMD_NAND_LOCK_UNLOCK
1308 bool "nand lock/unlock"
1310 NAND locking support.
1312 config CMD_NAND_TORTURE
1315 NAND torture support.
1324 NVM Express device support
1327 bool "onenand - access to onenand device"
1330 OneNAND is a brand of NAND ('Not AND' gate) flash which provides
1331 various useful features. This command allows reading, writing,
1332 and erasing blocks. It allso provides a way to show and change
1333 bad blocks, and test the device.
1335 config USE_ONENAND_BOARD_INIT
1336 bool "Call onenand_board_init() in the onenand command"
1337 depends on CMD_ONENAND
1342 Enable the 'osd' command which allows to query information from and
1343 write text data to a on-screen display (OSD) device; a virtual device
1344 associated with a display capable of displaying a text overlay on the
1345 display it's associated with..
1349 depends on PARTITIONS
1350 select PARTITION_UUIDS
1352 Read and display information about the partition table on
1356 bool "pci - Access PCI devices"
1358 Provide access to PCI (Peripheral Interconnect Bus), a type of bus
1359 used on some devices to allow the CPU to communicate with its
1360 peripherals. Sub-commands allow bus enumeration, displaying and
1361 changing configuration space and a few other features.
1364 bool "pinmux - show pins muxing"
1366 default y if PINCTRL
1368 Parse all available pin-controllers and show pins muxing. This
1369 is useful for debug purpoer to check the pin muxing and to know if
1370 a pin is configured as a GPIO or as an alternate function.
1375 Poweroff/Shutdown the system
1378 bool "read - Read binary data from a partition"
1380 Provides low-level access to the data in a partition.
1382 config CMD_REMOTEPROC
1384 depends on REMOTEPROC
1386 Support for Remote Processor control
1389 bool "sata - Access SATA subsystem"
1392 SATA (Serial Advanced Technology Attachment) is a serial bus
1393 standard for connecting to hard drives and other storage devices.
1394 This command provides information about attached devices and allows
1395 reading, writing and other operations.
1397 SATA replaces PATA (originally just ATA), which stands for Parallel AT
1398 Attachment, where AT refers to an IBM AT (Advanced Technology)
1399 computer released in 1984.
1402 bool "saves - Save a file over serial in S-Record format"
1404 Provides a way to save a binary file using the Motorola S-Record
1405 format over the serial line.
1408 bool "scsi - Access to SCSI devices"
1411 This provides a 'scsi' command which provides access to SCSI (Small
1412 Computer System Interface) devices. The command provides a way to
1413 scan the bus, reset the bus, read and write data and get information
1417 bool "sdram - Print SDRAM configuration information"
1419 Provides information about attached SDRAM. This assumed that the
1420 SDRAM has an EEPROM with information that can be read using the
1421 I2C bus. This is only available on some boards.
1425 depends on DM_SPI_FLASH || SPI_FLASH
1426 default y if DM_SPI_FLASH
1431 bool "sf test - Allow testing of SPI flash"
1434 Provides a way to test that SPI flash is working correctly. The
1435 test is destructive, in that an area of SPI flash must be provided
1436 for the test to use. Performance information is also provided,
1437 measuring the performance of reading, writing and erasing in
1438 Mbps (Million Bits Per Second). This value should approximately
1439 equal the SPI bus speed for a single-bit-wide SPI bus, assuming
1440 everything is working properly.
1443 bool "sspi - Command to access spi device"
1446 SPI utility command.
1448 config DEFAULT_SPI_BUS
1449 int "default spi bus used by sspi command"
1453 config DEFAULT_SPI_MODE
1454 hex "default spi mode used by sspi command (see include/spi.h)"
1458 config CMD_TEMPERATURE
1459 bool "temperature - display the temperature from thermal sensors"
1460 depends on DM_THERMAL
1462 Provides a way to list thermal sensors and to get their readings.
1465 bool "tsi148 - Command to access tsi148 device"
1467 This provides various sub-commands to initialise and configure the
1468 Turndra tsi148 device. See the command help for full details.
1471 bool "Enable UFS - Universal Flash Subsystem commands"
1474 "This provides commands to initialise and configure universal flash
1478 bool "universe - Command to set up the Turndra Universe controller"
1480 This allows setting up the VMEbus provided by this controller.
1481 See the command help for full details.
1491 select USB_FUNCTION_SDP
1493 Enables the command "sdp" which is used to have U-Boot emulating the
1494 Serial Download Protocol (SDP) via USB.
1498 depends on USB_FUNCTION_ROCKUSB
1500 Rockusb protocol is widely used by Rockchip SoC based devices. It can
1501 read/write info, image to/from devices. This enable rockusb command
1502 support to communication with rockusb device. for more detail about
1503 this command, please read doc/README.rockusb.
1505 config CMD_USB_MASS_STORAGE
1506 bool "UMS usb mass storage"
1507 depends on USB_GADGET_DOWNLOAD
1508 select USB_FUNCTION_MASS_STORAGE
1509 depends on BLK && USB_GADGET
1511 Enables the command "ums" and the USB mass storage support to the
1512 export a block device: U-Boot, the USB device, acts as a simple
1513 external hard drive plugged on the host USB port.
1516 bool "Xen para-virtualized block device"
1520 Xen para-virtualized block device support
1527 VirtIO block device support
1533 This provides commands to control the watchdog timer devices.
1539 Enable the command "axi" for accessing AXI (Advanced eXtensible
1540 Interface) busses, a on-chip interconnect specification for managing
1541 functional blocks in SoC designs, which is also often used in designs
1542 involving FPGAs (e.g. communication with IP cores in Xilinx FPGAs).
1546 menu "Shell scripting commands"
1551 Print file to standard output
1557 Echo args to console
1563 Return true/false on integer compare.
1569 Run script from memory
1575 Evaluate boolean and math expressions and store the result in an env
1577 Also supports loading the value at a memory location into a variable.
1578 If CONFIG_REGEX is enabled, setexpr also supports a gsub function.
1580 config CMD_SETEXPR_FMT
1582 depends on CMD_SETEXPR
1584 Evaluate format string expression and store result in an environment
1589 menu "Android support commands"
1591 config CMD_AB_SELECT
1593 depends on ANDROID_AB
1595 On Android devices with more than one boot slot (multiple copies of
1596 the kernel and system images) this provides a command to select which
1597 slot should be used to boot from and register the boot attempt. This
1598 is used by the new A/B update model where one slot is updated in the
1599 background while running from the other slot.
1606 bool "Network commands"
1616 bootp - boot image via network using BOOTP/TFTP protocol
1620 depends on CMD_BOOTP
1622 Boot image via network using DHCP/TFTP protocol
1624 config BOOTP_MAY_FAIL
1625 bool "Allow for the BOOTP/DHCP server to not be found"
1626 depends on CMD_BOOTP
1628 If the DHCP server is not found after the configured retry count, the
1629 call will fail instead of starting over. This can be used to fail
1630 over to Link-local IP address configuration if the DHCP server is not
1633 config BOOTP_BOOTPATH
1634 bool "Request & store 'rootpath' from BOOTP/DHCP server"
1636 depends on CMD_BOOTP
1638 Even though the config is called BOOTP_BOOTPATH, it stores the
1639 path in the variable 'rootpath'.
1641 config BOOTP_VENDOREX
1642 bool "Support vendor extensions from BOOTP/DHCP server"
1643 depends on CMD_BOOTP
1645 config BOOTP_BOOTFILESIZE
1646 bool "Request & store 'bootfilesize' from BOOTP/DHCP server"
1647 depends on CMD_BOOTP
1650 bool "Request & store 'dnsip' from BOOTP/DHCP server"
1652 depends on CMD_BOOTP
1654 The primary DNS server is stored as 'dnsip'. If two servers are
1655 returned, you must set BOOTP_DNS2 to store that second server IP
1659 bool "Store 'dnsip2' from BOOTP/DHCP server"
1660 depends on BOOTP_DNS
1662 If a DHCP client requests the DNS server IP from a DHCP server,
1663 it is possible that more than one DNS serverip is offered to the
1664 client. If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS
1665 server IP will be stored in the additional environment
1666 variable "dnsip2". The first DNS serverip is always
1667 stored in the variable "dnsip", when BOOTP_DNS is defined.
1669 config BOOTP_GATEWAY
1670 bool "Request & store 'gatewayip' from BOOTP/DHCP server"
1672 depends on CMD_BOOTP
1674 config BOOTP_HOSTNAME
1675 bool "Request & store 'hostname' from BOOTP/DHCP server"
1677 depends on CMD_BOOTP
1679 The name may or may not be qualified with the local domain name.
1681 config BOOTP_PREFER_SERVERIP
1682 bool "serverip variable takes precedent over DHCP server IP."
1683 depends on CMD_BOOTP
1685 By default a BOOTP/DHCP reply will overwrite the 'serverip' variable.
1687 With this option enabled, the 'serverip' variable in the environment
1688 takes precedence over DHCP server IP and will only be set by the DHCP
1689 server if not already set in the environment.
1691 config BOOTP_SUBNETMASK
1692 bool "Request & store 'netmask' from BOOTP/DHCP server"
1694 depends on CMD_BOOTP
1696 config BOOTP_NISDOMAIN
1697 bool "Request & store 'nisdomain' from BOOTP/DHCP server"
1698 depends on CMD_BOOTP
1700 config BOOTP_NTPSERVER
1701 bool "Request & store 'ntpserverip' from BOOTP/DHCP server"
1702 depends on CMD_BOOTP
1704 config BOOTP_TIMEOFFSET
1705 bool "Request & store 'timeoffset' from BOOTP/DHCP server"
1706 depends on CMD_BOOTP && CMD_SNTP
1711 Selecting this will allow capturing all Ethernet packets and store
1712 them in physical memory in a PCAP formated file,
1713 later to be analyzed by PCAP reader application (IE. WireShark).
1716 bool "Send PXE client arch to BOOTP/DHCP server"
1718 depends on CMD_BOOTP && CMD_PXE
1720 Supported for ARM, ARM64, and x86 for now.
1722 config BOOTP_PXE_CLIENTARCH
1724 depends on BOOTP_PXE
1725 default 0x16 if ARM64
1729 config BOOTP_VCI_STRING
1731 depends on CMD_BOOTP
1732 default "U-Boot.armv7" if CPU_V7A || CPU_V7M || CPU_V7R
1733 default "U-Boot.armv8" if ARM64
1734 default "U-Boot.arm" if ARM
1741 tftpboot - load file via network using TFTP protocol
1745 depends on CMD_TFTPBOOT
1747 TFTP put command, for uploading files to a server
1751 depends on CMD_TFTPBOOT
1753 Act as a TFTP server and boot the first received file
1755 config NET_TFTP_VARS
1756 bool "Control TFTP timeout and count through environment"
1757 depends on CMD_TFTPBOOT
1760 If set, allows controlling the TFTP timeout through the
1761 environment variable tftptimeout, and the TFTP maximum
1762 timeout count through the variable tftptimeoutcountmax.
1763 If unset, timeout and maximum are hard-defined as 1 second
1764 and 10 timouts per TFTP transfer.
1769 Boot image via network using RARP/TFTP protocol
1775 Boot image via network using NFS protocol.
1778 int "Timeout in milliseconds for NFS mounts"
1782 Timeout in milliseconds used in NFS protocol. If you encounter
1783 "ERROR: Cannot umount" in nfs command, try longer timeout such as
1786 config SYS_DISABLE_AUTOLOAD
1787 bool "Disable automatically loading files over the network"
1788 depends on CMD_BOOTP || CMD_DHCP || CMD_NFS || CMD_RARP
1790 Typically, commands such as "dhcp" will attempt to automatically
1791 load a file from the network, once the initial network configuration
1792 is complete. Enable this option to disable this behavior and instead
1793 require files to be loaded over the network by subsequent commands.
1799 If set, allows 802.3(clause 22) MII Management functions interface access
1800 The management interface specified in Clause 22 provides
1801 a simple, two signal, serial interface to connect a
1802 Station Management entity and a managed PHY for providing access
1803 to management parameters and services.
1804 The interface is referred to as the MII management interface.
1807 bool "Call mii_init() in the mii command"
1808 depends on CMD_MII && (MPC8XX_FEC || FSLDMAFE || MCFFEC)
1814 If set, allows Enable 802.3(clause 45) MDIO interface registers access
1815 The MDIO interface is orthogonal to the MII interface and extends
1816 it by adding access to more registers through indirect addressing.
1821 Send ICMP ECHO_REQUEST to network host
1826 Perform CDP network configuration
1832 Synchronize RTC via network
1837 Lookup the IP of a hostname
1839 config CMD_LINK_LOCAL
1843 Acquire a network IP address using the link-local protocol
1849 Manually configure the attached NIC via NC-SI.
1850 Normally this happens automatically before other network
1858 Allow control of L2 Ethernet switch commands. These are supported
1859 by the vsc9953 Ethernet driver at present. Sub-commands allow
1860 operations such as enabling / disabling a port and
1861 viewing/maintaining the filtering database (FDB)
1867 Boot image via network using PXE protocol
1872 Wait for wake-on-lan Magic Packet
1876 menu "Misc commands"
1879 bool "Enable 'bmp' command"
1882 This provides a way to obtain information about a BMP-format image
1883 and to display it. BMP (which presumably stands for BitMaP) is a
1884 file format defined by Microsoft which supports images of various
1885 depths, formats and compression methods. Headers on the file
1886 determine the formats used. This command can be used by first loading
1887 the image into RAM, then using this command to look at it or display
1890 config CMD_BOOTCOUNT
1892 depends on BOOTCOUNT_LIMIT
1894 Enable the bootcount command, which allows interrogation and
1895 reset of the bootcounter.
1898 bool "Enable board-specific commands"
1900 (deprecated: instead, please define a Kconfig option for each command)
1902 Some boards have board-specific commands which are only enabled
1903 during developemnt and need to be turned off for production. This
1904 option provides a way to control this. The commands that are enabled
1905 vary depending on the board.
1907 config CMD_BLOCK_CACHE
1908 bool "blkcache - control and stats for block cache"
1909 depends on BLOCK_CACHE
1910 default y if BLOCK_CACHE
1912 Enable the blkcache command, which can be used to control the
1913 operation of the cache functions.
1914 This is most useful when fine-tuning the operation of the cache
1915 during development, but also allows the cache to be disabled when
1916 it might hurt performance (e.g. when using the ums command).
1923 Enable the 'button' command which allows to get the status of
1924 buttons supported by the board. The buttonss can be listed with
1925 'button list' and state can be known with 'button <label>'.
1926 Any button drivers can be controlled with this command, e.g.
1930 bool "icache or dcache"
1932 Enable the "icache" and "dcache" commands
1934 config CMD_CONITRACE
1935 bool "conitrace - trace console input codes"
1937 Enable the 'conitrace' command which displays the codes received
1938 from the console input as hexadecimal numbers.
1941 bool "Enable clear screen command 'cls'"
1942 default y if LCD || DM_VIDEO
1944 Enable the 'cls' command which clears the screen contents
1945 on video frame buffer.
1948 bool "efidebug - display/configure UEFI environment"
1949 depends on EFI_LOADER
1950 select EFI_DEVICE_PATH_TO_TEXT
1952 Enable the 'efidebug' command which provides a subset of UEFI
1953 shell utility with simplified functionality. It will be useful
1954 particularly for managing boot parameters as well as examining
1955 various EFI status for debugging.
1957 config CMD_EFICONFIG
1958 bool "eficonfig - provide menu-driven uefi variables maintenance interface"
1959 depends on CMD_BOOTEFI_BOOTMGR
1961 Enable the 'eficonfig' command which provides the menu-driven UEFI
1962 variable maintenance interface.
1964 config CMD_EXCEPTION
1965 bool "exception - raise exception"
1966 depends on ARM || RISCV || SANDBOX || X86
1968 Enable the 'exception' command which allows to raise an exception.
1975 Enable the 'led' command which allows for control of LEDs supported
1976 by the board. The LEDs can be listed with 'led list' and controlled
1977 with led on/off/togle/blink. Any LED drivers can be controlled with
1978 this command, e.g. led_gpio.
1985 Enable the 'date' command for getting/setting the time/date in RTC
1992 Enable the 'rtc' command for low-level access to RTC devices.
1997 Run commands and summarize execution time.
2000 bool "gettime - read elapsed time"
2002 Enable the 'gettime' command which reads the elapsed time since
2003 U-Boot started running. This shows the time in seconds and
2004 milliseconds. See also the 'bootstage' command which provides more
2005 flexibility for boot timing.
2008 bool "pause command"
2010 Delay execution waiting for any user input.
2011 Useful to allow the user to read a failure log.
2016 default y if SANDBOX
2019 Print bytes from the hardware random number generator.
2021 config CMD_KASLRSEED
2025 Set the kaslr-seed in the chosen node with entropy provided by a
2026 hardware random number generator.
2032 Delay execution for some time
2035 bool "support for multiprocessor commands"
2039 This enables commands to bringup different processors
2040 in multiprocessor cases.
2045 Access the system timer.
2051 This provides basic access to the U-Boot's sound support. The main
2052 feature is to play a beep.
2054 sound init - set up sound system
2055 sound play - play a sound
2061 Boot image via local extlinux.conf file
2067 This provides access to the QEMU firmware interface. The main
2068 feature is to allow easy loading of files passed to qemu-system
2069 via -kernel / -initrd
2074 This provides access to Linux PStore with Rammoops backend. The main
2075 feature is to allow to display or save PStore records.
2077 See doc/pstore.rst for more information.
2081 config CMD_PSTORE_MEM_ADDR
2082 hex "Memory Address"
2083 depends on CMD_PSTORE
2085 Base addr used for PStore ramoops memory, should be identical to
2086 ramoops.mem_address parameter used by kernel
2088 config CMD_PSTORE_MEM_SIZE
2090 depends on CMD_PSTORE
2093 Size of PStore ramoops memory, should be identical to ramoops.mem_size
2094 parameter used by kernel, a power of 2 and larger than the sum of the
2097 config CMD_PSTORE_RECORD_SIZE
2098 hex "Dump record size"
2099 depends on CMD_PSTORE
2102 Size of each dump done on oops/panic, should be identical to
2103 ramoops.record_size parameter used by kernel and a power of 2
2106 config CMD_PSTORE_CONSOLE_SIZE
2107 hex "Kernel console log size"
2108 depends on CMD_PSTORE
2111 Size of kernel console log, should be identical to
2112 ramoops.console_size parameter used by kernel and a power of 2
2115 config CMD_PSTORE_FTRACE_SIZE
2116 hex "FTrace log size"
2117 depends on CMD_PSTORE
2120 Size of ftrace log, should be identical to ramoops.ftrace_size
2121 parameter used by kernel and a power of 2
2123 config CMD_PSTORE_PMSG_SIZE
2124 hex "User space message log size"
2125 depends on CMD_PSTORE
2128 Size of user space message log, should be identical to
2129 ramoops.pmsg_size parameter used by kernel and a power of 2
2131 config CMD_PSTORE_ECC_SIZE
2133 depends on CMD_PSTORE
2136 if non-zero, the option enables ECC support and specifies ECC buffer
2137 size in bytes (1 is a special value, means 16 bytes ECC), should be
2138 identical to ramoops.ramoops_ecc parameter used by kernel
2142 source "cmd/mvebu/Kconfig"
2145 bool "terminal - provides a way to attach a serial terminal"
2147 Provides a 'cu'-like serial terminal command. This can be used to
2148 access other serial ports from the system console. The terminal
2149 is very simple with no special processing of characters. As with
2150 cu, you can press ~. (tilde followed by period) to exit.
2153 bool "uuid, guid - generation of unique IDs"
2156 This enables two commands:
2158 uuid - generate random Universally Unique Identifier
2159 guid - generate Globally Unique Identifier based on random UUID
2161 The two commands are very similar except for the endianness of the
2164 config CMD_VIDCONSOLE
2165 bool "lcdputs and setcurs"
2169 Enabling this will provide 'setcurs' and 'lcdputs' commands which
2170 support cursor positioning and drawing strings on the video
2171 console (framebuffer).
2173 The name 'lcdputs' is a bit of a misnomer, but so named because the
2174 video device is often an LCD.
2178 source "cmd/ti/Kconfig"
2180 config CMD_BOOTSTAGE
2181 bool "Enable the 'bootstage' command"
2182 depends on BOOTSTAGE
2184 Add a 'bootstage' command which supports printing a report
2185 and un/stashing of bootstage data.
2187 menu "Power commands"
2189 bool "Enable Driver Model PMIC command"
2192 This is the pmic command, based on a driver model pmic's API.
2193 Command features are unchanged:
2194 - list - list pmic devices
2195 - pmic dev <id> - show or [set] operating pmic device (NEW)
2196 - pmic dump - dump registers
2197 - pmic read address - read byte of register at address
2198 - pmic write address - write byte to register at address
2199 The only one change for this command is 'dev' subcommand.
2201 config CMD_REGULATOR
2202 bool "Enable Driver Model REGULATOR command"
2203 depends on DM_REGULATOR
2205 This command is based on driver model regulator's API.
2206 User interface features:
2207 - list - list regulator devices
2208 - regulator dev <id> - show or [set] operating regulator device
2209 - regulator info - print constraints info
2210 - regulator status - print operating status
2211 - regulator value <val] <-f> - print/[set] voltage value [uV]
2212 - regulator current <val> - print/[set] current value [uA]
2213 - regulator mode <id> - print/[set] operating mode id
2214 - regulator enable - enable the regulator output
2215 - regulator disable - disable the regulator output
2217 The '-f' (force) option can be used for set the value which exceeds
2218 the limits, which are found in device-tree and are kept in regulator's
2219 uclass plat structure.
2223 menu "Security commands"
2225 bool "Enable the 'aes' command"
2228 This provides a means to encrypt and decrypt data using the AES
2229 (Advanced Encryption Standard). This algorithm uses a symetric key
2230 and is widely used as a streaming cipher. Different key lengths are
2231 supported by the algorithm but this command only supports 128 bits
2235 bool "Enable the 'blob' command"
2236 depends on !MX6ULL && !MX6SLL && !MX6SL
2237 select IMX_HAB if ARCH_MX6 || ARCH_MX7 || ARCH_MX7ULP || ARCH_IMX8M
2239 This is used with the Freescale secure boot mechanism.
2241 Freescale's SEC block has built-in Blob Protocol which provides
2242 a method for protecting user-defined data across system power
2243 cycles. SEC block protects data in a data structure called a Blob,
2244 which provides both confidentiality and integrity protection.
2246 Encapsulating data as a blob
2247 Each time that the Blob Protocol is used to protect data, a
2248 different randomly generated key is used to encrypt the data.
2249 This random key is itself encrypted using a key which is derived
2250 from SoC's non-volatile secret key and a 16 bit Key identifier.
2251 The resulting encrypted key along with encrypted data is called a
2252 blob. The non-volatile secure key is available for use only during
2255 During decapsulation, the reverse process is performed to get back
2259 blob enc - encapsulating data as a cryptgraphic blob
2260 blob dec - decapsulating cryptgraphic blob to get the data
2264 blob enc src dst len km
2266 Encapsulate and create blob of data $len bytes long
2267 at address $src and store the result at address $dst.
2268 $km is the 16 byte key modifier is also required for
2269 generation/use as key for cryptographic operation. Key
2270 modifier should be 16 byte long.
2272 blob dec src dst len km
2274 Decapsulate the blob of data at address $src and
2275 store result of $len byte at addr $dst.
2276 $km is the 16 byte key modifier is also required for
2277 generation/use as key for cryptographic operation. Key
2278 modifier should be 16 byte long.
2281 bool "Support 'hash' command"
2284 This provides a way to hash data in memory using various supported
2285 algorithms (such as SHA1, MD5, CRC32). The computed digest can be
2286 saved to memory or to an environment variable. It is also possible
2287 to verify a hash against data in memory.
2290 bool "Support the 'hvc' command"
2291 depends on ARM_SMCCC
2293 Allows issuing Hypervisor Calls (HVCs). Mostly useful for
2294 development and testing.
2297 bool "Support the 'smc' command"
2298 depends on ARM_SMCCC
2300 Allows issuing Secure Monitor Calls (SMCs). Mostly useful for
2301 development and testing.
2307 Add -v option to verify data against a hash.
2310 bool "scp03 - SCP03 enable and rotate/provision operations"
2313 This command provides access to a Trusted Application
2314 running in a TEE to request Secure Channel Protocol 03
2315 (SCP03) enablement and/or rotation of its SCP03 keys.
2324 bool "Enable the 'tpm' command"
2325 depends on TPM_V1 || TPM_V2
2326 select CMD_TPM_V1 if TPM_V1
2327 select CMD_TPM_V2 if TPM_V2
2329 This provides a means to talk to a TPM from the command line. A wide
2330 range of commands if provided - see 'tpm help' for details. The
2331 command requires a suitable TPM on your board and the correct driver
2337 bool "Enable the 'tpm test' command"
2340 This provides a a series of tests to confirm that the TPMv1.x is
2341 working correctly. The tests cover initialisation, non-volatile RAM,
2342 extend, global lock and checking that timing is within expectations.
2343 The tests pass correctly on Infineon TPMs but may need to be adjusted
2350 menu "Firmware commands"
2352 bool "Enable crosec command"
2356 Enable command-line access to the Chrome OS EC (Embedded
2357 Controller). This provides the 'crosec' command which has
2358 a number of sub-commands for performing EC tasks such as
2359 updating its flash, accessing a small saved context area
2360 and talking to the I2C bus behind the EC (if there is one).
2363 menu "Filesystem commands"
2365 bool "Enable the 'btrsubvol' command"
2368 This enables the 'btrsubvol' command to list subvolumes
2369 of a BTRFS filesystem. There are no special commands for
2370 listing BTRFS directories or loading BTRFS files - this
2371 can be done by the generic 'fs' commands (see CMD_FS_GENERIC)
2372 when BTRFS is enabled (see FS_BTRFS).
2375 bool "Enable the 'cbfs' command"
2378 Define this to enable support for reading from a Coreboot
2379 filesystem. This is a ROM-based filesystem used for accessing files
2380 on systems that use coreboot as the first boot-loader and then load
2381 U-Boot to actually boot the Operating System. Available commands are
2382 cbfsinit, cbfsinfo, cbfsls and cbfsload.
2385 bool "Enable the 'cramfs' command"
2386 depends on FS_CRAMFS
2388 This provides commands for dealing with CRAMFS (Compressed ROM
2389 filesystem). CRAMFS is useful when space is tight since files are
2390 compressed. Two commands are provided:
2392 cramfsls - lists files in a cramfs image
2393 cramfsload - loads a file from a cramfs image
2396 bool "EROFS command support"
2399 Support for the EROFS fs
2402 bool "ext2 command support"
2405 Enables EXT2 FS command
2408 bool "ext4 command support"
2411 Enables EXT4 FS command
2413 config CMD_EXT4_WRITE
2415 bool "ext4 write command support"
2418 Enables EXT4 FS write command
2421 bool "FAT command support"
2424 Support for the FAT fs
2427 bool "SquashFS command support"
2430 Enables SquashFS filesystem commands (e.g. load, ls).
2432 config CMD_FS_GENERIC
2433 bool "filesystem commands"
2435 Enables filesystem commands (e.g. load, ls) that work for multiple
2439 bool "fsuuid command"
2441 Enables fsuuid command for filesystem UUID.
2444 bool "jffs2 command"
2447 Enables commands to support the JFFS2 (Journalling Flash File System
2448 version 2) filesystem. This enables fsload, ls and fsinfo which
2449 provide the ability to load files, list directories and obtain
2450 filesystem information.
2453 string "Default device for JFFS2"
2454 depends on CMD_JFFS2
2457 The default device to use with the jffs2 command.
2459 config JFFS2_PART_OFFSET
2460 hex "Default offset within flash to locate the JFFS2 image"
2461 depends on CMD_JFFS2
2464 The default offset within flash to locate the JFFS2 image.
2466 config JFFS2_PART_SIZE
2467 hex "Default size of JFFS2 partition"
2468 depends on CMD_JFFS2
2471 The default size of the JFFS2 partition
2474 bool "MTD partition support"
2477 MTD partitioning tool support.
2478 It is strongly encouraged to avoid using this command
2479 anymore along with 'sf', 'nand', 'onenand'. One can still
2480 declare the partitions in the mtdparts environment variable
2481 but better use the MTD stack and the 'mtd' command instead.
2483 config CMD_MTDPARTS_SPREAD
2484 bool "Padd partition size to take account of bad blocks"
2485 depends on CMD_MTDPARTS
2487 This enables the 'spread' sub-command of the mtdparts command.
2488 This command will modify the existing mtdparts variable by increasing
2489 the size of the partitions such that 1) each partition's net size is
2490 at least as large as the size specified in the mtdparts variable and
2491 2) each partition starts on a good block.
2493 config CMD_MTDPARTS_SHOW_NET_SIZES
2494 bool "Show net size (w/o bad blocks) of partitions"
2495 depends on CMD_MTDPARTS
2497 Adds two columns to the printed partition table showing the
2498 effective usable size of a partition, if bad blocks are taken
2501 config MTDIDS_DEFAULT
2502 string "Default MTD IDs"
2503 depends on MTD || SPI_FLASH
2505 Defines a default MTD IDs list for use with MTD partitions in the
2506 Linux MTD command line partitions format.
2508 config MTDPARTS_DEFAULT
2509 string "Default MTD partition scheme"
2510 depends on MTD || SPI_FLASH
2512 Defines a default MTD partitioning scheme in the Linux MTD command
2513 line partitions format
2516 bool "reiser - Access to reiserfs filesystems"
2518 This provides two commands which operate on a resierfs filesystem,
2519 commonly used some years ago:
2521 reiserls - list files
2522 reiserload - load a file
2525 bool "yaffs2 - Access of YAFFS2 filesystem"
2529 This provides commands for accessing a YAFFS2 filesystem. Yet
2530 Another Flash Filesystem 2 is a filesystem designed specifically
2531 for NAND flash. It incorporates bad-block management and ensures
2532 that device writes are sequential regardless of filesystem
2536 bool "zfs - Access of ZFS filesystem"
2538 This provides commands to accessing a ZFS filesystem, commonly used
2539 on Solaris systems. Two sub-commands are provided:
2541 zfsls - list files in a directory
2542 zfsload - load a file
2544 See doc/README.zfs for more details.
2548 menu "Debug commands"
2550 config CMD_CBSYSINFO
2553 default y if SYS_COREBOOT
2555 This provides information about the coreboot sysinfo table stored in
2556 memory by coreboot before jumping to U-Boot. It can be useful for
2557 debugging the beaaviour of coreboot or U-Boot.
2560 bool "cyclic - Show information about cyclic functions"
2564 This enables the 'cyclic' command which provides information about
2565 cyclic execution functions. This infrastructure allows registering
2566 functions to be executed cyclically, e.g. every 100ms. These commands
2569 cyclic list - list cyclic functions
2570 cyclic cyclic demo <cycletime_ms> <delay_us> - register cyclic
2573 See doc/develop/cyclic.rst for more details.
2576 bool "diag - Board diagnostics"
2578 This command provides access to board diagnostic tests. These are
2579 called Power-on Self Tests (POST). The command allows listing of
2580 available tests and running either all the tests, or specific tests
2584 bool "event - Show information about events"
2585 default y if EVENT_DEBUG
2587 This enables the 'event' command which provides information about
2588 events and event-handler routines. This can help to device event
2592 bool "irq - Show information about interrupts"
2593 depends on !ARM && !MIPS && !RISCV && !SH
2595 This enables two commands:
2597 interrupts - enable or disable interrupts
2598 irqinfo - print device-specific interrupt information
2601 bool "kgdb - Allow debugging of U-Boot with gdb"
2604 This enables a 'kgdb' command which allows gdb to connect to U-Boot
2605 over a serial link for debugging purposes. This allows
2606 single-stepping, inspecting variables, etc. This is supported only
2607 on PowerPC at present.
2610 bool "log - Generation, control and access to logging"
2614 This provides access to logging features. It allows the output of
2615 log data to be controlled to a limited extent (setting up the default
2616 maximum log level for emitting of records). It also provides access
2617 to a command used for testing the log system.
2620 bool "trace - Support tracing of function calls and timing"
2624 Enables a command to control using of function tracing within
2625 U-Boot. This allows recording of call traces including timing
2626 information. The command can write data to memory for exporting
2627 for analysis (e.g. using bootchart). See doc/README.trace for full
2631 bool "avb - Android Verified Boot 2.0 operations"
2632 depends on AVB_VERIFY
2634 Enables a "avb" command to perform verification of partitions using
2635 Android Verified Boot 2.0 functionality. It includes such subcommands:
2636 avb init - initialize avb2 subsystem
2637 avb read_rb - read rollback index
2638 avb write_rb - write rollback index
2639 avb is_unlocked - check device lock state
2640 avb get_uuid - read and print uuid of a partition
2641 avb read_part - read data from partition
2642 avb read_part_hex - read data from partition and output to stdout
2643 avb write_part - write data to partition
2644 avb verify - run full verification chain
2646 config CMD_STACKPROTECTOR_TEST
2647 bool "Test command for stack protector"
2648 depends on STACKPROTECTOR
2650 Enable stackprot_test command
2651 The stackprot_test command will force a stack overrun to test
2652 the stack smashing detection mechanisms.
2657 tristate "Enable UBI - Unsorted block images commands"
2660 UBI is a software layer above MTD layer which admits use of LVM-like
2661 logical volumes on top of MTD devices, hides some complexities of
2662 flash chips like wear and bad blocks and provides some other useful
2663 capabilities. Please, consult the MTD web site for more details
2664 (www.linux-mtd.infradead.org). Activate this option if you want
2665 to use U-Boot UBI commands.
2666 It is also strongly encouraged to also enable CONFIG_MTD to get full
2669 config CMD_UBI_RENAME
2670 bool "Enable rename"
2673 Enable a "ubi" command to rename ubi volume:
2674 ubi rename <oldname> <newname>
2677 tristate "Enable UBIFS - Unsorted block images filesystem commands"
2679 default y if CMD_UBI
2683 UBIFS is a file system for flash devices which works on top of UBI.
2685 config MMC_SPEED_MODE_SET
2686 bool "set speed mode using mmc command"
2690 Enable setting speed mode using mmc rescan and mmc dev commands.
2691 The speed mode is provided as the last argument in these commands
2692 and is indicated using the index from enum bus_mode in
2693 include/mmc.h. A speed mode can be set only if it has already
2694 been enabled in the device tree.
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