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"
92 bool "Command execution tracer"
96 This option enables the possiblity to print all commands before
97 executing them and after all variables are evaluated (similar
98 to Bash's xtrace/'set -x' feature).
99 To enable the tracer a variable "xtrace" needs to be defined in
114 List and dump ACPI tables. ACPI (Advanced Configuration and Power
115 Interface) is used mostly on x86 for providing information to the
116 Operating System about devices in the system. The tables are set up
117 by the firmware, typically U-Boot but possibly an earlier firmware
118 module, if U-Boot is chain-loaded from something else. ACPI tables
119 can also include code, to perform hardware-specific tasks required
120 by the Operating Systems. This allows some amount of separation
121 between the firmware and OS, and is particularly useful when you
122 want to make hardware changes without the OS needing to be adjusted.
129 List non-identity virtual-physical memory mappings for 32-bit CPUs.
142 Print ".config" contents.
144 If this option is enabled, the ".config" file contents are embedded
145 in the U-Boot image and can be printed on the console by the "config"
146 command. This provides information of which options are enabled on
153 Print console devices and information.
159 Print information about available CPUs. This normally shows the
160 number of CPUs, type (e.g. manufacturer, architecture, product or
161 internal name) and clock frequency. Other information may be
162 available depending on the CPU driver.
168 Print GPL license text
173 Provides access to the Intel Power-Management Controller (PMC) so
174 that its state can be examined. This does not currently support
175 changing the state but it is still useful for debugging and seeing
184 config CMD_TLV_EEPROM
186 depends on I2C_EEPROM
188 Display and program the system EEPROM data block in ONIE Tlvinfo
189 format. TLV stands for Type-Length-Value.
191 config SPL_CMD_TLV_EEPROM
192 bool "tlv_eeprom for SPL"
193 depends on SPL_I2C_EEPROM
194 select SPL_DRIVERS_MISC
196 Read system EEPROM data block in ONIE Tlvinfo format from SPL.
200 depends on RISCV_SMODE && SBI_V02
202 Display information about the SBI implementation.
212 Run the command stored in the environment "bootcmd", i.e.
213 "bootd" does the same thing as "run bootcmd".
219 Boot an application image from the memory.
221 config CMD_BOOTM_PRE_LOAD
222 bool "enable pre-load on bootm"
224 depends on IMAGE_PRE_LOAD
227 Enable support of stage pre-load for the bootm command.
228 This stage allow to check or modify the image provided
229 to the bootm command.
234 default y if BOOTSTD_FULL
236 Support listing available bootdevs (boot devices) which can provide an
237 OS to boot, as well as showing information about a particular one.
239 This command is not necessary for bootstd to work.
246 Support scanning for bootflows available with the bootdevs. The
247 bootflows can optionally be booted.
249 config CMD_BOOTFLOW_FULL
250 bool "bootflow - extract subcommands"
251 depends on BOOTSTD_FULL
252 default y if BOOTSTD_FULL
254 Add the ability to list the available bootflows, select one and obtain
255 information about it.
257 This command is not necessary for bootstd to work.
262 default y if BOOTSTD_FULL
264 Support listing available bootmethds (methods used to boot an
265 Operating System), as well as selecting the order that the bootmeths
268 This command is not necessary for bootstd to work.
271 bool "Support booting UEFI FIT images"
272 depends on CMD_BOOTEFI && CMD_BOOTM && FIT
275 Support booting UEFI FIT images via the bootm command.
280 Boot the Linux zImage
284 depends on ARM64 || RISCV
287 Boot an AArch64 Linux Kernel image from memory.
290 bool "Support booting Linux OS images"
291 depends on CMD_BOOTM || CMD_BOOTZ || CMD_BOOTI
294 Support booting the Linux kernel directly via a command such as bootm
298 bool "Support booting NetBSD (non-EFI) loader images"
302 Support booting NetBSD via the bootm command.
304 config BOOTM_OPENRTOS
305 bool "Support booting OPENRTOS / FreeRTOS images"
308 Support booting OPENRTOS / FreeRTOS via the bootm command.
311 bool "Support booting Enea OSE images"
312 depends on (ARM && (ARM64 || CPU_V7A || CPU_V7R) || SANDBOX || PPC || X86)
315 Support booting Enea OSE images via the bootm command.
318 bool "Support booting Plan9 OS images"
322 Support booting Plan9 images via the bootm command.
325 bool "Support booting RTEMS OS images"
329 Support booting RTEMS images via the bootm command.
332 bool "Support booting VxWorks OS images"
336 Support booting VxWorks images via the bootm command.
339 hex "Maximum size of a decompresed OS image"
340 depends on CMD_BOOTM || CMD_BOOTI || CMD_BOOTZ
341 default 0x4000000 if PPC || ARM64
342 default 0x1000000 if X86 || ARCH_MX6 || ARCH_MX7
345 This is the maximum size of the buffer that is used to decompress the OS
346 image in to, if passing a compressed image to bootm/booti/bootz.
350 depends on EFI_LOADER
353 Boot an EFI image from memory.
355 config CMD_BOOTEFI_HELLO_COMPILE
356 bool "Compile a standard EFI hello world binary for testing"
357 depends on CMD_BOOTEFI && !CPU_V7M
360 This compiles a standard EFI hello world application with U-Boot so
361 that it can be used with the test/py testing framework. This is useful
362 for testing that EFI is working at a basic level, and for bringing
363 up EFI support on a new architecture.
365 No additional space will be required in the resulting U-Boot binary
366 when this option is enabled.
368 config CMD_BOOTEFI_HELLO
369 bool "Allow booting a standard EFI hello world for testing"
370 depends on CMD_BOOTEFI_HELLO_COMPILE
371 default y if CMD_BOOTEFI_SELFTEST
373 This adds a standard EFI hello world application to U-Boot so that
374 it can be used with the 'bootefi hello' command. 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 source lib/efi_selftest/Kconfig
385 Add an ANSI terminal boot menu command.
390 Android DTB/DTBO image manipulation commands. Read dtb/dtbo files from
391 image into RAM, dump image structure information, etc. Those dtb/dtbo
392 files should be merged in one dtb further, which needs to be passed to
393 the kernel, as part of a boot process.
397 depends on ANDROID_BOOT_IMAGE
399 Android Boot Image manipulation commands. Allows one to extract
400 images contained in boot.img, like kernel, ramdisk, dtb, etc, and
401 obtain corresponding meta-information from boot.img.
403 See doc/android/boot-image.rst for details.
406 bool "bootelf, bootvx"
410 Boot an ELF/vxWorks image from the memory.
413 bool "Flattened Device Tree utility commands"
417 Do FDT related setup before booting into the Operating System.
419 config SUPPORT_EXTENSION_SCAN
423 bool "Extension board management command"
425 depends on SUPPORT_EXTENSION_SCAN
427 Enables the "extension" command, which allows to detect
428 extension boards connected to the system, and apply
429 corresponding Device Tree overlays.
435 Start an application at a given address.
441 Run the command in the given environment variable.
447 Print header information for application image.
452 List all images found in flash
458 Extract a part of a multi-image.
461 bool "spl export - Export boot information for Falcon boot"
464 Falcon mode allows booting directly from SPL into an Operating
465 System such as Linux, thus skipping U-Boot proper. See
466 doc/README.falcon for full information about how to use this
469 config CMD_SPL_NAND_OFS
470 hex "Offset of OS args or dtb for Falcon-mode NAND boot"
471 depends on CMD_SPL && (TPL_NAND_SUPPORT || SPL_NAND_SUPPORT)
474 This provides the offset of the command line arguments for Linux
475 when booting from NAND in Falcon mode. See doc/README.falcon
476 for full information about how to use this option (and also see
477 board/gateworks/gw_ventana/README for an example).
479 config CMD_SPL_NOR_OFS
480 hex "Offset of OS args or dtb for Falcon-mode NOR boot"
481 depends on CMD_SPL && SPL_NOR_SUPPORT
484 This provides the offset of the command line arguments or dtb for
485 Linux when booting from NOR in Falcon mode.
487 config CMD_SPL_WRITE_SIZE
488 hex "Size of argument area"
492 This provides the size of the command-line argument area in NAND
493 flash used by Falcon-mode boot. See the documentation until CMD_SPL
496 config CMD_THOR_DOWNLOAD
497 bool "thor - TIZEN 'thor' download"
500 Implements the 'thor' download protocol. This is a way of
501 downloading a software update over USB from an attached host.
502 There is no documentation about this within the U-Boot source code
503 but you should be able to find something on the interwebs.
506 bool "zboot - x86 boot command"
508 With x86 machines it is common to boot a bzImage file which
509 contains both a kernel and a setup.bin file. The latter includes
510 configuration information from the dark ages which x86 boards still
511 need to pick things out of.
513 Consider using FIT in preference to this since it supports directly
514 booting both 32- and 64-bit kernels, as well as secure boot.
515 Documentation is available in doc/uImage.FIT/x86-fit-boot.txt
519 menu "Environment commands"
522 bool "ask for env variable"
524 Ask for environment variable
542 Edit environment variable.
547 Allow for searching environment variables
553 Save all environment variables into the compiled-in persistent
558 depends on CMD_SAVEENV
560 Erase environment variables from the compiled-in persistent
563 config CMD_ENV_EXISTS
567 Check if a variable is defined in the environment for use in
570 config CMD_ENV_CALLBACK
571 bool "env callbacks - print callbacks and their associated variables"
573 Some environment variable have callbacks defined by
574 U_BOOT_ENV_CALLBACK. These are called when the variable changes.
575 For example changing "baudrate" adjust the serial baud rate. This
576 command lists the currently defined callbacks.
579 bool "env flags -print variables that have non-default flags"
581 Some environment variables have special flags that control their
582 behaviour. For example, serial# can only be written once and cannot
583 be deleted. This command shows the variables that have special
586 config CMD_NVEDIT_EFI
587 bool "env [set|print] -e - set/print UEFI variables"
588 depends on EFI_LOADER
591 UEFI variables are encoded as some form of U-Boot variables.
592 If enabled, we are allowed to set/print UEFI variables using
593 "env" command with "-e" option without knowing details.
595 config CMD_NVEDIT_INDIRECT
596 bool "env indirect - Sets environment value from another"
598 config CMD_NVEDIT_INFO
599 bool "env info - print or evaluate environment information"
601 Print environment information:
602 - env_valid : is environment valid
603 - env_ready : is environment imported into hash table
604 - env_use_default : is default environment used
606 This command can be optionally used for evaluation in scripts:
607 [-d] : evaluate whether default environment is used
608 [-p] : evaluate whether environment can be persisted
610 The result of multiple evaluations will be combined with AND.
612 config CMD_NVEDIT_LOAD
615 Load all environment variables from the compiled-in persistent
618 config CMD_NVEDIT_SELECT
621 Select the compiled-in persistent storage of environment variables.
625 menu "Memory commands"
630 Compute binary operations (xor, or, and) of byte arrays of arbitrary
631 size from memory and store the result in memory or the environment.
635 default y if BLOBLIST
637 Show information about the bloblist, a collection of binary blobs
638 held in memory that persist between SPL and U-Boot. In the case of
639 x86 devices the bloblist can be used to hold ACPI tables so that they
640 remain available in memory.
653 Add -v option to verify data against a crc32 checksum.
656 bool "eeprom - EEPROM subsystem"
658 (deprecated, needs conversion to driver model)
659 Provides commands to read and write EEPROM (Electrically Erasable
660 Programmable Read Only Memory) chips that are connected over an
663 config CMD_EEPROM_LAYOUT
664 bool "Enable layout-aware eeprom commands"
665 depends on CMD_EEPROM
667 (deprecated, needs conversion to driver model)
668 When enabled, additional eeprom sub-commands become available.
670 eeprom print - prints the contents of the eeprom in a human-readable
671 way (eeprom layout fields, and data formatted to be fit for human
674 eeprom update - allows user to update eeprom fields by specifying
675 the field name, and providing the new data in a human readable format
676 (same format as displayed by the eeprom print command).
678 Both commands can either auto detect the layout, or be told which
682 __weak int parse_layout_version(char *str)
683 - override to provide your own layout name parsing
684 __weak void __eeprom_layout_assign(struct eeprom_layout *layout,
686 - override to setup the layout metadata based on the version
687 __weak int eeprom_layout_detect(unsigned char *data)
688 - override to provide your own algorithm for detecting layout
691 - contains various printing and updating functions for common
692 types of eeprom fields. Can be used for defining
695 config EEPROM_LAYOUT_HELP_STRING
696 string "Tells user what layout names are supported"
697 depends on CMD_EEPROM_LAYOUT
698 default "<not defined>"
700 Help printed with the LAYOUT VERSIONS part of the 'eeprom'
703 config SYS_I2C_EEPROM_BUS
704 int "I2C bus of the EEPROM device."
705 depends on CMD_EEPROM
708 config SYS_I2C_EEPROM_ADDR_LEN
709 int "Length in bytes of the EEPROM memory array address"
710 depends on CMD_EEPROM || ID_EEPROM
714 Note: This is NOT the chip address length!
716 config SYS_EEPROM_SIZE
717 depends on CMD_EEPROM
718 int "Size in bytes of the EEPROM device"
721 config SYS_EEPROM_PAGE_WRITE_BITS
722 int "Number of bits used to address bytes in a single page"
723 depends on CMD_EEPROM
726 The EEPROM page size is 2^SYS_EEPROM_PAGE_WRITE_BITS.
727 A 64 byte page, for example would require six bits.
729 config SYS_EEPROM_PAGE_WRITE_DELAY_MS
730 int "Number of milliseconds to delay between page writes"
731 depends on CMD_EEPROM || CMD_I2C
737 Infinite write loop on address range
743 Compute MD5 checksum.
747 depends on CMD_MD5SUM
749 Add -v option to verify data against an MD5 checksum.
754 Display memory information.
757 bool "md, mm, nm, mw, cp, cmp, base, loop"
762 mm - memory modify (auto-incrementing address)
763 nm - memory modify (constant address)
764 mw - memory write (fill)
767 base - print or set address offset
768 loop - initialize loop on address range
770 config CMD_MEM_SEARCH
771 bool "ms - Memory search"
773 Memory-search command
775 This allows searching through a region of memory looking for hex
776 data (byte, 16-bit word, 32-bit long, also 64-bit on machines that
777 support it). It is also possible to search for a string. The
778 command accepts a memory range and a list of values to search for.
779 The values need to appear in memory in the same order they are given
780 in the command. At most 10 matches can be returned at a time, but
781 pressing return will show the next 10 matches. Environment variables
782 are set for use with scripting (memmatches, memaddr, mempos).
785 bool "Enable cyclic md/mw commands"
786 depends on CMD_MEMORY
788 Add the "mdc" and "mwc" memory commands. These are cyclic
793 This command will print 4 bytes (10,11,12,13) each 500 ms.
795 => mwc.l 100 12345678 10
796 This command will write 12345678 to address 100 all 10 ms.
801 depends on CMD_MEMORY && (LIB_RAND || LIB_HW_RAND)
803 random - fill memory with random data
808 Simple RAM read/write test.
812 config SYS_ALT_MEMTEST
813 bool "Alternative test"
815 Use a more complete alternative memory test.
819 config SYS_ALT_MEMTEST_BITFLIP
823 The alternative memory test includes bitflip test since 2020.07.
824 The bitflip test significantly increases the overall test time.
825 Bitflip test can optionally be disabled here.
829 config SYS_MEMTEST_START
830 hex "default start address for mtest"
833 This is the default start address for mtest for simple read/write
834 test. If no arguments are given to mtest, default address is used
837 config SYS_MEMTEST_END
838 hex "default end address for mtest"
841 This is the default end address for mtest for simple read/write
842 test. If no arguments are given to mtest, default address is used
851 Compute SHA1 checksum.
853 config SHA1SUM_VERIFY
855 depends on CMD_SHA1SUM
857 Add -v option to verify data against a SHA1 checksum.
860 bool "strings - display strings in memory"
862 This works similarly to the Unix 'strings' command except that it
863 works with a memory range. String of printable characters found
864 within the range are displayed. The minimum number of characters
865 for a sequence to be considered a string can be provided.
869 menu "Compression commands"
873 default y if CMD_BOOTI
876 Support decompressing an LZMA (Lempel-Ziv-Markov chain algorithm)
881 default y if CMD_BOOTI
884 Support decompressing an LZ4 image from memory region.
888 default y if CMD_BOOTI
891 Uncompress a zip-compressed memory region.
895 select GZIP_COMPRESSED
897 Compress a memory region with zlib deflate method.
901 menu "Device access commands"
904 #depends on FLASH_CFI_DRIVER
907 ARM Ltd reference designs flash partition access
910 bool "adc - Access Analog to Digital Converters info and data"
912 depends on DM_REGULATOR
914 Shows ADC device info and permit printing one-shot analog converted
915 data from a named Analog to Digital Converter.
920 depends on PARTITIONS
922 Read/modify/write the fields of Bootloader Control Block, usually
923 stored on the flash "misc" partition with its structure defined in:
924 https://android.googlesource.com/platform/bootable/recovery/+/master/
925 bootloader_message/include/bootloader_message/bootloader_message.h
927 Some real-life use-cases include (but are not limited to):
928 - Determine the "boot reason" (and act accordingly):
929 https://source.android.com/devices/bootloader/boot-reason
930 - Get/pass a list of commands from/to recovery:
931 https://android.googlesource.com/platform/bootable/recovery
932 - Inspect/dump the contents of the BCB fields
935 bool "bind/unbind - Bind or unbind a device to/from a driver"
938 Bind or unbind a device to/from a driver from the command line.
939 This is useful in situations where a device may be handled by several
940 drivers. For example, this can be used to bind a UDC to the usb ether
941 gadget driver from the command line.
944 bool "clk - Show clock frequencies"
947 Shows clock frequences by calling a sock_clk_dump() hook function.
948 This is depreated in favour of using the CLK uclass and accessing
949 clock values from associated drivers. However currently no command
953 bool "demo - Demonstration commands for driver model"
956 Provides a 'demo' command which can be used to play around with
957 driver model. To use this properly you will need to enable one or
958 both of the demo devices (DM_DEMO_SHAPE and DM_DEMO_SIMPLE).
959 Otherwise you will always get an empty list of devices. The demo
960 devices are defined in the sandbox device tree, so the easiest
961 option is to use sandbox and pass the -d point to sandbox's
968 Enables the command "dfu" which is used to have U-Boot create a DFU
969 class device via USB. This command requires that the "dfu_alt_info"
970 environment variable be set and define the alt settings to expose to
974 bool "dm - Access to driver model information"
977 Provides access to driver model data structures and information,
978 such as a list of devices, list of uclasses and the state of each
979 device (e.g. activated). This is not required for operation, but
980 can be useful to see the state of driver model for debugging or
984 bool "fastboot - Android fastboot support"
987 This enables the command "fastboot" which enables the Android
988 fastboot mode for the platform. Fastboot is a protocol for
989 downloading images, flashing and device control used on
990 Android devices. Fastboot requires either the network stack
991 enabled or support for acting as a USB device.
993 See doc/android/fastboot.rst for more information.
996 bool "flinfo, erase, protect"
998 depends on MTD || FLASH_CFI_DRIVER || MTD_NOR_FLASH
1001 flinfo - print FLASH memory information
1002 erase - FLASH memory
1003 protect - enable or disable FLASH write protection
1012 config CMD_FPGA_LOADBP
1013 bool "fpga loadbp - load partial bitstream (Xilinx only)"
1016 Supports loading an FPGA device from a bitstream buffer containing
1017 a partial bitstream.
1019 config CMD_FPGA_LOADFS
1020 bool "fpga loadfs - load bitstream from FAT filesystem (Xilinx only)"
1023 Supports loading an FPGA device from a FAT filesystem.
1025 config CMD_FPGA_LOADMK
1026 bool "fpga loadmk - load bitstream from image"
1029 Supports loading an FPGA device from a image generated by mkimage.
1031 config CMD_FPGA_LOADP
1032 bool "fpga loadp - load partial bitstream"
1035 Supports loading an FPGA device from a bitstream buffer containing
1036 a partial bitstream.
1038 config CMD_FPGA_LOAD_SECURE
1039 bool "fpga loads - loads secure bitstreams (Xilinx only)"
1042 Enables the fpga loads command which is used to load secure
1043 (authenticated or encrypted or both) bitstreams on to FPGA.
1046 bool "fpgad - dump FPGA registers"
1048 (legacy, needs conversion to driver model)
1049 Provides a way to dump FPGA registers by calling the board-specific
1050 fpga_get_reg() function. This functions similarly to the 'md'
1054 bool "fuse - support for the fuse subssystem"
1056 (deprecated - needs conversion to driver model)
1057 This allows reading, sensing, programming or overriding fuses
1058 which control the behaviour of the device. The command uses the
1066 config CMD_GPIO_READ
1067 bool "gpio read - save GPIO value to variable"
1070 Enables the 'gpio read' command that saves the value
1071 of a GPIO pin to a variable.
1077 Control PWM channels, this allows invert/config/enable/disable PWM channels.
1080 bool "GPT (GUID Partition Table) command"
1081 select EFI_PARTITION
1082 select HAVE_BLOCK_DEVICE
1083 select PARTITION_UUIDS
1086 Enable the 'gpt' command to ready and write GPT style partition
1090 bool "GPT Random UUID generation"
1093 Enable the generation of partitions with random UUIDs if none
1096 config CMD_GPT_RENAME
1097 bool "GPT partition renaming commands"
1100 Enables the 'gpt' command to interchange names on two GPT
1101 partitions via the 'gpt swap' command or to rename single
1102 partitions via the 'rename' command.
1105 bool "ide - Support for IDE drivers"
1108 Provides an 'ide' command which allows accessing the IDE drive,
1109 resetting the IDE interface, printing the partition table and
1110 geting device info. It also enables the 'diskboot' command which
1111 permits booting from an IDE drive.
1114 bool "io - Support for performing I/O accesses"
1116 Provides an 'iod' command to display I/O space and an 'iow' command
1117 to write values to the I/O space. This can be useful for manually
1118 checking the state of devices during boot when debugging device
1122 bool "iotrace - Support for tracing I/O activity"
1124 Provides an 'iotrace' command which supports recording I/O reads and
1125 writes in a trace buffer in memory . It also maintains a checksum
1126 of the trace records (even if space is exhausted) so that the
1127 sequence of I/O accesses can be verified.
1129 When debugging drivers it is useful to see what I/O accesses were
1130 done and in what order.
1132 Even if the individual accesses are of little interest it can be
1133 useful to verify that the access pattern is consistent each time
1134 an operation is performed. In this case a checksum can be used to
1135 characterise the operation of a driver. The checksum can be compared
1136 across different runs of the operation to verify that the driver is
1139 In particular, when performing major refactoring of the driver, where
1140 the access pattern should not change, the checksum provides assurance
1141 that the refactoring work has not broken the driver.
1143 This works by sneaking into the io.h heder for an architecture and
1144 redirecting I/O accesses through iotrace's tracing mechanism.
1146 For now no commands are provided to examine the trace buffer. The
1147 format is fairly simple, so 'md' is a reasonable substitute.
1149 Note: The checksum feature is only useful for I/O regions where the
1150 contents do not change outside of software control. Where this is not
1151 suitable you can fall back to manually comparing the addresses. It
1152 might be useful to enhance tracing to only checksum the accesses and
1153 not the data read/written.
1163 bool "w1 - Support for Dallas 1-Wire protocol"
1165 Dallas 1-wire protocol support
1171 Load a binary file over serial line.
1176 Load a binary over memory mapped.
1182 Load an S-Record file over serial line
1186 bool "lsblk - list block drivers and devices"
1188 Print list of available block device drivers, and for each, the list
1189 of known block devices.
1192 bool "MBR (Master Boot Record) command"
1193 select DOS_PARTITION
1194 select HAVE_BLOCK_DEVICE
1196 Enable the 'mbr' command to ready and write MBR (Master Boot Record)
1197 style partition tables.
1203 Enable the command "misc" for accessing miscellaneous devices with
1204 a MISC uclass driver. The command provides listing all MISC devices
1205 as well as read and write functionalities via their drivers.
1211 MMC memory mapped support.
1215 config CMD_BKOPS_ENABLE
1216 bool "mmc bkops enable"
1219 Enable command for setting manual background operations handshake
1220 on a eMMC device. The feature is optionally available on eMMC devices
1221 conforming to standard >= 4.41.
1224 bool "Enable support for RPMB in the mmc command"
1225 depends on SUPPORT_EMMC_RPMB
1227 Enable the commands for reading, writing and programming the
1228 key for the Replay Protection Memory Block partition in eMMC.
1230 config CMD_MMC_SWRITE
1232 depends on MMC_WRITE
1235 Enable support for the "mmc swrite" command to write Android sparse
1244 Enable storage cloning over block devices, useful for
1245 initial flashing by external block device without network
1248 config CMD_OPTEE_RPMB
1249 bool "Enable read/write support on RPMB via OPTEE"
1250 depends on SUPPORT_EMMC_RPMB && OPTEE
1252 Enable the commands for reading, writing persistent named values
1253 in the Replay Protection Memory Block partition in eMMC by
1254 using Persistent Objects in OPTEE
1259 select MTD_PARTITIONS
1261 MTD commands support.
1265 depends on MULTIPLEXER
1267 List, select, and deselect mux controllers on the fly.
1271 default y if NAND_SUNXI
1272 depends on MTD_RAW_NAND
1277 config CMD_NAND_TRIMFFS
1278 bool "nand write.trimffs"
1279 default y if ARCH_SUNXI
1281 Allows one to skip empty pages when flashing something on a NAND.
1283 config CMD_NAND_LOCK_UNLOCK
1284 bool "nand lock/unlock"
1286 NAND locking support.
1288 config CMD_NAND_TORTURE
1291 NAND torture support.
1300 NVM Express device support
1303 bool "onenand - access to onenand device"
1306 OneNAND is a brand of NAND ('Not AND' gate) flash which provides
1307 various useful features. This command allows reading, writing,
1308 and erasing blocks. It allso provides a way to show and change
1309 bad blocks, and test the device.
1311 config USE_ONENAND_BOARD_INIT
1312 bool "Call onenand_board_init() in the onenand command"
1313 depends on CMD_ONENAND
1318 Enable the 'osd' command which allows to query information from and
1319 write text data to a on-screen display (OSD) device; a virtual device
1320 associated with a display capable of displaying a text overlay on the
1321 display it's associated with..
1325 depends on PARTITIONS
1326 select HAVE_BLOCK_DEVICE
1327 select PARTITION_UUIDS
1329 Read and display information about the partition table on
1333 bool "pci - Access PCI devices"
1335 Provide access to PCI (Peripheral Interconnect Bus), a type of bus
1336 used on some devices to allow the CPU to communicate with its
1337 peripherals. Sub-commands allow bus enumeration, displaying and
1338 changing configuration space and a few other features.
1341 bool "pinmux - show pins muxing"
1343 default y if PINCTRL
1345 Parse all available pin-controllers and show pins muxing. This
1346 is useful for debug purpoer to check the pin muxing and to know if
1347 a pin is configured as a GPIO or as an alternate function.
1352 Poweroff/Shutdown the system
1355 bool "read - Read binary data from a partition"
1357 Provides low-level access to the data in a partition.
1359 config CMD_REMOTEPROC
1361 depends on REMOTEPROC
1363 Support for Remote Processor control
1366 bool "sata - Access SATA subsystem"
1369 SATA (Serial Advanced Technology Attachment) is a serial bus
1370 standard for connecting to hard drives and other storage devices.
1371 This command provides information about attached devices and allows
1372 reading, writing and other operations.
1374 SATA replaces PATA (originally just ATA), which stands for Parallel AT
1375 Attachment, where AT refers to an IBM AT (Advanced Technology)
1376 computer released in 1984.
1379 bool "saves - Save a file over serial in S-Record format"
1381 Provides a way to save a binary file using the Motorola S-Record
1382 format over the serial line.
1385 bool "scsi - Access to SCSI devices"
1388 This provides a 'scsi' command which provides access to SCSI (Small
1389 Computer System Interface) devices. The command provides a way to
1390 scan the bus, reset the bus, read and write data and get information
1394 bool "sdram - Print SDRAM configuration information"
1396 Provides information about attached SDRAM. This assumed that the
1397 SDRAM has an EEPROM with information that can be read using the
1398 I2C bus. This is only available on some boards.
1402 depends on DM_SPI_FLASH || SPI_FLASH
1403 default y if DM_SPI_FLASH
1408 bool "sf test - Allow testing of SPI flash"
1411 Provides a way to test that SPI flash is working correctly. The
1412 test is destructive, in that an area of SPI flash must be provided
1413 for the test to use. Performance information is also provided,
1414 measuring the performance of reading, writing and erasing in
1415 Mbps (Million Bits Per Second). This value should approximately
1416 equal the SPI bus speed for a single-bit-wide SPI bus, assuming
1417 everything is working properly.
1420 bool "sspi - Command to access spi device"
1423 SPI utility command.
1425 config DEFAULT_SPI_BUS
1426 int "default spi bus used by sspi command"
1430 config DEFAULT_SPI_MODE
1431 hex "default spi mode used by sspi command (see include/spi.h)"
1436 bool "tsi148 - Command to access tsi148 device"
1438 This provides various sub-commands to initialise and configure the
1439 Turndra tsi148 device. See the command help for full details.
1442 bool "Enable UFS - Universal Flash Subsystem commands"
1445 "This provides commands to initialise and configure universal flash
1449 bool "universe - Command to set up the Turndra Universe controller"
1451 This allows setting up the VMEbus provided by this controller.
1452 See the command help for full details.
1457 select HAVE_BLOCK_DEVICE
1463 select USB_FUNCTION_SDP
1465 Enables the command "sdp" which is used to have U-Boot emulating the
1466 Serial Download Protocol (SDP) via USB.
1470 depends on USB_FUNCTION_ROCKUSB
1472 Rockusb protocol is widely used by Rockchip SoC based devices. It can
1473 read/write info, image to/from devices. This enable rockusb command
1474 support to communication with rockusb device. for more detail about
1475 this command, please read doc/README.rockusb.
1477 config CMD_USB_MASS_STORAGE
1478 bool "UMS usb mass storage"
1479 depends on USB_GADGET_DOWNLOAD
1480 select USB_FUNCTION_MASS_STORAGE
1481 depends on BLK && USB_GADGET
1483 Enables the command "ums" and the USB mass storage support to the
1484 export a block device: U-Boot, the USB device, acts as a simple
1485 external hard drive plugged on the host USB port.
1488 bool "Xen para-virtualized block device"
1492 Xen para-virtualized block device support
1497 depends on HAVE_BLOCK_DEVICE
1500 VirtIO block device support
1506 This provides commands to control the watchdog timer devices.
1512 Enable the command "axi" for accessing AXI (Advanced eXtensible
1513 Interface) busses, a on-chip interconnect specification for managing
1514 functional blocks in SoC designs, which is also often used in designs
1515 involving FPGAs (e.g. communication with IP cores in Xilinx FPGAs).
1519 menu "Shell scripting commands"
1525 Echo args to console
1531 Return true/false on integer compare.
1537 Run script from memory
1543 Evaluate boolean and math expressions and store the result in an env
1545 Also supports loading the value at a memory location into a variable.
1546 If CONFIG_REGEX is enabled, setexpr also supports a gsub function.
1548 config CMD_SETEXPR_FMT
1550 depends on CMD_SETEXPR
1552 Evaluate format string expression and store result in an environment
1557 menu "Android support commands"
1559 config CMD_AB_SELECT
1561 depends on ANDROID_AB
1563 On Android devices with more than one boot slot (multiple copies of
1564 the kernel and system images) this provides a command to select which
1565 slot should be used to boot from and register the boot attempt. This
1566 is used by the new A/B update model where one slot is updated in the
1567 background while running from the other slot.
1574 bool "Network commands"
1584 bootp - boot image via network using BOOTP/TFTP protocol
1588 depends on CMD_BOOTP
1590 Boot image via network using DHCP/TFTP protocol
1592 config BOOTP_MAY_FAIL
1593 bool "Allow for the BOOTP/DHCP server to not be found"
1594 depends on CMD_BOOTP
1596 If the DHCP server is not found after the configured retry count, the
1597 call will fail instead of starting over. This can be used to fail
1598 over to Link-local IP address configuration if the DHCP server is not
1601 config BOOTP_BOOTPATH
1602 bool "Request & store 'rootpath' from BOOTP/DHCP server"
1604 depends on CMD_BOOTP
1606 Even though the config is called BOOTP_BOOTPATH, it stores the
1607 path in the variable 'rootpath'.
1609 config BOOTP_VENDOREX
1610 bool "Support vendor extensions from BOOTP/DHCP server"
1611 depends on CMD_BOOTP
1613 config BOOTP_BOOTFILESIZE
1614 bool "Request & store 'bootfilesize' from BOOTP/DHCP server"
1615 depends on CMD_BOOTP
1618 bool "Request & store 'dnsip' from BOOTP/DHCP server"
1620 depends on CMD_BOOTP
1622 The primary DNS server is stored as 'dnsip'. If two servers are
1623 returned, you must set BOOTP_DNS2 to store that second server IP
1627 bool "Store 'dnsip2' from BOOTP/DHCP server"
1628 depends on BOOTP_DNS
1630 If a DHCP client requests the DNS server IP from a DHCP server,
1631 it is possible that more than one DNS serverip is offered to the
1632 client. If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS
1633 server IP will be stored in the additional environment
1634 variable "dnsip2". The first DNS serverip is always
1635 stored in the variable "dnsip", when BOOTP_DNS is defined.
1637 config BOOTP_GATEWAY
1638 bool "Request & store 'gatewayip' from BOOTP/DHCP server"
1640 depends on CMD_BOOTP
1642 config BOOTP_HOSTNAME
1643 bool "Request & store 'hostname' from BOOTP/DHCP server"
1645 depends on CMD_BOOTP
1647 The name may or may not be qualified with the local domain name.
1649 config BOOTP_PREFER_SERVERIP
1650 bool "serverip variable takes precedent over DHCP server IP."
1651 depends on CMD_BOOTP
1653 By default a BOOTP/DHCP reply will overwrite the 'serverip' variable.
1655 With this option enabled, the 'serverip' variable in the environment
1656 takes precedence over DHCP server IP and will only be set by the DHCP
1657 server if not already set in the environment.
1659 config BOOTP_SUBNETMASK
1660 bool "Request & store 'netmask' from BOOTP/DHCP server"
1662 depends on CMD_BOOTP
1664 config BOOTP_NISDOMAIN
1665 bool "Request & store 'nisdomain' from BOOTP/DHCP server"
1666 depends on CMD_BOOTP
1668 config BOOTP_NTPSERVER
1669 bool "Request & store 'ntpserverip' from BOOTP/DHCP server"
1670 depends on CMD_BOOTP
1672 config BOOTP_TIMEOFFSET
1673 bool "Request & store 'timeoffset' from BOOTP/DHCP server"
1674 depends on CMD_BOOTP && CMD_SNTP
1679 Selecting this will allow capturing all Ethernet packets and store
1680 them in physical memory in a PCAP formated file,
1681 later to be analyzed by PCAP reader application (IE. WireShark).
1684 bool "Send PXE client arch to BOOTP/DHCP server"
1686 depends on CMD_BOOTP && CMD_PXE
1688 Supported for ARM, ARM64, and x86 for now.
1690 config BOOTP_PXE_CLIENTARCH
1692 depends on BOOTP_PXE
1693 default 0x16 if ARM64
1697 config BOOTP_VCI_STRING
1699 depends on CMD_BOOTP
1700 default "U-Boot.armv7" if CPU_V7A || CPU_V7M || CPU_V7R
1701 default "U-Boot.armv8" if ARM64
1702 default "U-Boot.arm" if ARM
1709 tftpboot - boot image via network using TFTP protocol
1713 depends on CMD_TFTPBOOT
1715 TFTP put command, for uploading files to a server
1719 depends on CMD_TFTPBOOT
1721 Act as a TFTP server and boot the first received file
1723 config NET_TFTP_VARS
1724 bool "Control TFTP timeout and count through environment"
1725 depends on CMD_TFTPBOOT
1728 If set, allows controlling the TFTP timeout through the
1729 environment variable tftptimeout, and the TFTP maximum
1730 timeout count through the variable tftptimeoutcountmax.
1731 If unset, timeout and maximum are hard-defined as 1 second
1732 and 10 timouts per TFTP transfer.
1737 Boot image via network using RARP/TFTP protocol
1743 Boot image via network using NFS protocol.
1746 int "Timeout in milliseconds for NFS mounts"
1750 Timeout in milliseconds used in NFS protocol. If you encounter
1751 "ERROR: Cannot umount" in nfs command, try longer timeout such as
1754 config SYS_DISABLE_AUTOLOAD
1755 bool "Disable automatically loading files over the network"
1756 depends on CMD_BOOTP || CMD_DHCP || CMD_NFS || CMD_RARP
1758 Typically, commands such as "dhcp" will attempt to automatically
1759 load a file from the network, once the initial network configuration
1760 is complete. Enable this option to disable this behavior and instead
1761 require files to be loaded over the network by subsequent commands.
1767 If set, allows 802.3(clause 22) MII Management functions interface access
1768 The management interface specified in Clause 22 provides
1769 a simple, two signal, serial interface to connect a
1770 Station Management entity and a managed PHY for providing access
1771 to management parameters and services.
1772 The interface is referred to as the MII management interface.
1775 bool "Call mii_init() in the mii command"
1776 depends on CMD_MII && (MPC8XX_FEC || FSLDMAFE || MCFFEC)
1782 If set, allows Enable 802.3(clause 45) MDIO interface registers access
1783 The MDIO interface is orthogonal to the MII interface and extends
1784 it by adding access to more registers through indirect addressing.
1789 Send ICMP ECHO_REQUEST to network host
1794 Perform CDP network configuration
1800 Synchronize RTC via network
1805 Lookup the IP of a hostname
1807 config CMD_LINK_LOCAL
1811 Acquire a network IP address using the link-local protocol
1818 Allow control of L2 Ethernet switch commands. These are supported
1819 by the vsc9953 Ethernet driver at present. Sub-commands allow
1820 operations such as enabling / disabling a port and
1821 viewing/maintaining the filtering database (FDB)
1827 Boot image via network using PXE protocol
1832 Wait for wake-on-lan Magic Packet
1836 menu "Misc commands"
1839 bool "Enable 'bmp' command"
1840 depends on LCD || DM_VIDEO || VIDEO
1842 This provides a way to obtain information about a BMP-format image
1843 and to display it. BMP (which presumably stands for BitMaP) is a
1844 file format defined by Microsoft which supports images of various
1845 depths, formats and compression methods. Headers on the file
1846 determine the formats used. This command can be used by first loading
1847 the image into RAM, then using this command to look at it or display
1850 config CMD_BOOTCOUNT
1852 depends on BOOTCOUNT_LIMIT
1854 Enable the bootcount command, which allows interrogation and
1855 reset of the bootcounter.
1858 bool "Enable board-specific commands"
1860 (deprecated: instead, please define a Kconfig option for each command)
1862 Some boards have board-specific commands which are only enabled
1863 during developemnt and need to be turned off for production. This
1864 option provides a way to control this. The commands that are enabled
1865 vary depending on the board.
1867 config CMD_BLOCK_CACHE
1868 bool "blkcache - control and stats for block cache"
1869 depends on BLOCK_CACHE
1870 default y if BLOCK_CACHE
1872 Enable the blkcache command, which can be used to control the
1873 operation of the cache functions.
1874 This is most useful when fine-tuning the operation of the cache
1875 during development, but also allows the cache to be disabled when
1876 it might hurt performance (e.g. when using the ums command).
1883 Enable the 'button' command which allows to get the status of
1884 buttons supported by the board. The buttonss can be listed with
1885 'button list' and state can be known with 'button <label>'.
1886 Any button drivers can be controlled with this command, e.g.
1890 bool "icache or dcache"
1892 Enable the "icache" and "dcache" commands
1894 config CMD_CONITRACE
1895 bool "conitrace - trace console input codes"
1897 Enable the 'conitrace' command which displays the codes received
1898 from the console input as hexadecimal numbers.
1901 bool "Enable clear screen command 'cls'"
1902 depends on DM_VIDEO || LCD || VIDEO
1905 Enable the 'cls' command which clears the screen contents
1906 on video frame buffer.
1909 bool "efidebug - display/configure UEFI environment"
1910 depends on EFI_LOADER
1911 select EFI_DEVICE_PATH_TO_TEXT
1913 Enable the 'efidebug' command which provides a subset of UEFI
1914 shell utility with simplified functionality. It will be useful
1915 particularly for managing boot parameters as well as examining
1916 various EFI status for debugging.
1918 config CMD_EXCEPTION
1919 bool "exception - raise exception"
1920 depends on ARM || RISCV || SANDBOX || X86
1922 Enable the 'exception' command which allows to raise an exception.
1929 Enable the 'led' command which allows for control of LEDs supported
1930 by the board. The LEDs can be listed with 'led list' and controlled
1931 with led on/off/togle/blink. Any LED drivers can be controlled with
1932 this command, e.g. led_gpio.
1939 Enable the 'date' command for getting/setting the time/date in RTC
1946 Enable the 'rtc' command for low-level access to RTC devices.
1951 Run commands and summarize execution time.
1954 bool "gettime - read elapsed time"
1956 Enable the 'gettime' command which reads the elapsed time since
1957 U-Boot started running. This shows the time in seconds and
1958 milliseconds. See also the 'bootstage' command which provides more
1959 flexibility for boot timing.
1966 Print bytes from the hardware random number generator.
1968 config CMD_KASLRSEED
1972 Set the kaslr-seed in the chosen node with entropy provided by a
1973 hardware random number generator.
1979 Delay execution for some time
1982 bool "support for multiprocessor commands"
1986 This enables commands to bringup different processors
1987 in multiprocessor cases.
1992 Access the system timer.
1998 This provides basic access to the U-Boot's sound support. The main
1999 feature is to play a beep.
2001 sound init - set up sound system
2002 sound play - play a sound
2008 Boot image via local extlinux.conf file
2014 This provides access to the QEMU firmware interface. The main
2015 feature is to allow easy loading of files passed to qemu-system
2016 via -kernel / -initrd
2021 This provides access to Linux PStore with Rammoops backend. The main
2022 feature is to allow to display or save PStore records.
2024 See doc/pstore.rst for more information.
2028 config CMD_PSTORE_MEM_ADDR
2029 hex "Memory Address"
2030 depends on CMD_PSTORE
2032 Base addr used for PStore ramoops memory, should be identical to
2033 ramoops.mem_address parameter used by kernel
2035 config CMD_PSTORE_MEM_SIZE
2037 depends on CMD_PSTORE
2040 Size of PStore ramoops memory, should be identical to ramoops.mem_size
2041 parameter used by kernel, a power of 2 and larger than the sum of the
2044 config CMD_PSTORE_RECORD_SIZE
2045 hex "Dump record size"
2046 depends on CMD_PSTORE
2049 Size of each dump done on oops/panic, should be identical to
2050 ramoops.record_size parameter used by kernel and a power of 2
2053 config CMD_PSTORE_CONSOLE_SIZE
2054 hex "Kernel console log size"
2055 depends on CMD_PSTORE
2058 Size of kernel console log, should be identical to
2059 ramoops.console_size parameter used by kernel and a power of 2
2062 config CMD_PSTORE_FTRACE_SIZE
2063 hex "FTrace log size"
2064 depends on CMD_PSTORE
2067 Size of ftrace log, should be identical to ramoops.ftrace_size
2068 parameter used by kernel and a power of 2
2070 config CMD_PSTORE_PMSG_SIZE
2071 hex "User space message log size"
2072 depends on CMD_PSTORE
2075 Size of user space message log, should be identical to
2076 ramoops.pmsg_size parameter used by kernel and a power of 2
2078 config CMD_PSTORE_ECC_SIZE
2080 depends on CMD_PSTORE
2083 if non-zero, the option enables ECC support and specifies ECC buffer
2084 size in bytes (1 is a special value, means 16 bytes ECC), should be
2085 identical to ramoops.ramoops_ecc parameter used by kernel
2089 source "cmd/mvebu/Kconfig"
2092 bool "terminal - provides a way to attach a serial terminal"
2094 Provides a 'cu'-like serial terminal command. This can be used to
2095 access other serial ports from the system console. The terminal
2096 is very simple with no special processing of characters. As with
2097 cu, you can press ~. (tilde followed by period) to exit.
2100 bool "uuid, guid - generation of unique IDs"
2103 This enables two commands:
2105 uuid - generate random Universally Unique Identifier
2106 guid - generate Globally Unique Identifier based on random UUID
2108 The two commands are very similar except for the endianness of the
2113 source "cmd/ti/Kconfig"
2115 config CMD_BOOTSTAGE
2116 bool "Enable the 'bootstage' command"
2117 depends on BOOTSTAGE
2119 Add a 'bootstage' command which supports printing a report
2120 and un/stashing of bootstage data.
2122 menu "Power commands"
2124 bool "Enable Driver Model PMIC command"
2127 This is the pmic command, based on a driver model pmic's API.
2128 Command features are unchanged:
2129 - list - list pmic devices
2130 - pmic dev <id> - show or [set] operating pmic device (NEW)
2131 - pmic dump - dump registers
2132 - pmic read address - read byte of register at address
2133 - pmic write address - write byte to register at address
2134 The only one change for this command is 'dev' subcommand.
2136 config CMD_REGULATOR
2137 bool "Enable Driver Model REGULATOR command"
2138 depends on DM_REGULATOR
2140 This command is based on driver model regulator's API.
2141 User interface features:
2142 - list - list regulator devices
2143 - regulator dev <id> - show or [set] operating regulator device
2144 - regulator info - print constraints info
2145 - regulator status - print operating status
2146 - regulator value <val] <-f> - print/[set] voltage value [uV]
2147 - regulator current <val> - print/[set] current value [uA]
2148 - regulator mode <id> - print/[set] operating mode id
2149 - regulator enable - enable the regulator output
2150 - regulator disable - disable the regulator output
2152 The '-f' (force) option can be used for set the value which exceeds
2153 the limits, which are found in device-tree and are kept in regulator's
2154 uclass plat structure.
2158 menu "Security commands"
2160 bool "Enable the 'aes' command"
2163 This provides a means to encrypt and decrypt data using the AES
2164 (Advanced Encryption Standard). This algorithm uses a symetric key
2165 and is widely used as a streaming cipher. Different key lengths are
2166 supported by the algorithm but this command only supports 128 bits
2170 bool "Enable the 'blob' command"
2171 depends on !MX6ULL && !MX6SLL && !MX6SL
2172 select IMX_HAB if ARCH_MX6 || ARCH_MX7 || ARCH_MX7ULP || ARCH_IMX8M
2174 This is used with the Freescale secure boot mechanism.
2176 Freescale's SEC block has built-in Blob Protocol which provides
2177 a method for protecting user-defined data across system power
2178 cycles. SEC block protects data in a data structure called a Blob,
2179 which provides both confidentiality and integrity protection.
2181 Encapsulating data as a blob
2182 Each time that the Blob Protocol is used to protect data, a
2183 different randomly generated key is used to encrypt the data.
2184 This random key is itself encrypted using a key which is derived
2185 from SoC's non-volatile secret key and a 16 bit Key identifier.
2186 The resulting encrypted key along with encrypted data is called a
2187 blob. The non-volatile secure key is available for use only during
2190 During decapsulation, the reverse process is performed to get back
2194 blob enc - encapsulating data as a cryptgraphic blob
2195 blob dec - decapsulating cryptgraphic blob to get the data
2199 blob enc src dst len km
2201 Encapsulate and create blob of data $len bytes long
2202 at address $src and store the result at address $dst.
2203 $km is the 16 byte key modifier is also required for
2204 generation/use as key for cryptographic operation. Key
2205 modifier should be 16 byte long.
2207 blob dec src dst len km
2209 Decapsulate the blob of data at address $src and
2210 store result of $len byte at addr $dst.
2211 $km is the 16 byte key modifier is also required for
2212 generation/use as key for cryptographic operation. Key
2213 modifier should be 16 byte long.
2216 bool "Support 'hash' command"
2219 This provides a way to hash data in memory using various supported
2220 algorithms (such as SHA1, MD5, CRC32). The computed digest can be
2221 saved to memory or to an environment variable. It is also possible
2222 to verify a hash against data in memory.
2225 bool "Support the 'hvc' command"
2226 depends on ARM_SMCCC
2228 Allows issuing Hypervisor Calls (HVCs). Mostly useful for
2229 development and testing.
2232 bool "Support the 'smc' command"
2233 depends on ARM_SMCCC
2235 Allows issuing Secure Monitor Calls (SMCs). Mostly useful for
2236 development and testing.
2242 Add -v option to verify data against a hash.
2245 bool "scp03 - SCP03 enable and rotate/provision operations"
2248 This command provides access to a Trusted Application
2249 running in a TEE to request Secure Channel Protocol 03
2250 (SCP03) enablement and/or rotation of its SCP03 keys.
2259 bool "Enable the 'tpm' command"
2260 depends on TPM_V1 || TPM_V2
2261 select CMD_TPM_V1 if TPM_V1
2262 select CMD_TPM_V2 if TPM_V2
2264 This provides a means to talk to a TPM from the command line. A wide
2265 range of commands if provided - see 'tpm help' for details. The
2266 command requires a suitable TPM on your board and the correct driver
2272 bool "Enable the 'tpm test' command"
2275 This provides a a series of tests to confirm that the TPMv1.x is
2276 working correctly. The tests cover initialisation, non-volatile RAM,
2277 extend, global lock and checking that timing is within expectations.
2278 The tests pass correctly on Infineon TPMs but may need to be adjusted
2285 menu "Firmware commands"
2287 bool "Enable crosec command"
2291 Enable command-line access to the Chrome OS EC (Embedded
2292 Controller). This provides the 'crosec' command which has
2293 a number of sub-commands for performing EC tasks such as
2294 updating its flash, accessing a small saved context area
2295 and talking to the I2C bus behind the EC (if there is one).
2298 menu "Filesystem commands"
2300 bool "Enable the 'btrsubvol' command"
2303 This enables the 'btrsubvol' command to list subvolumes
2304 of a BTRFS filesystem. There are no special commands for
2305 listing BTRFS directories or loading BTRFS files - this
2306 can be done by the generic 'fs' commands (see CMD_FS_GENERIC)
2307 when BTRFS is enabled (see FS_BTRFS).
2310 bool "Enable the 'cbfs' command"
2313 Define this to enable support for reading from a Coreboot
2314 filesystem. This is a ROM-based filesystem used for accessing files
2315 on systems that use coreboot as the first boot-loader and then load
2316 U-Boot to actually boot the Operating System. Available commands are
2317 cbfsinit, cbfsinfo, cbfsls and cbfsload.
2320 bool "Enable the 'cramfs' command"
2321 depends on FS_CRAMFS
2323 This provides commands for dealing with CRAMFS (Compressed ROM
2324 filesystem). CRAMFS is useful when space is tight since files are
2325 compressed. Two commands are provided:
2327 cramfsls - lists files in a cramfs image
2328 cramfsload - loads a file from a cramfs image
2331 bool "EROFS command support"
2334 Support for the EROFS fs
2337 bool "ext2 command support"
2340 Enables EXT2 FS command
2343 bool "ext4 command support"
2346 Enables EXT4 FS command
2348 config CMD_EXT4_WRITE
2350 bool "ext4 write command support"
2353 Enables EXT4 FS write command
2356 bool "FAT command support"
2359 Support for the FAT fs
2362 bool "SquashFS command support"
2365 Enables SquashFS filesystem commands (e.g. load, ls).
2367 config CMD_FS_GENERIC
2368 bool "filesystem commands"
2370 Enables filesystem commands (e.g. load, ls) that work for multiple
2374 bool "fsuuid command"
2376 Enables fsuuid command for filesystem UUID.
2379 bool "jffs2 command"
2382 Enables commands to support the JFFS2 (Journalling Flash File System
2383 version 2) filesystem. This enables fsload, ls and fsinfo which
2384 provide the ability to load files, list directories and obtain
2385 filesystem information.
2388 string "Default device for JFFS2"
2389 depends on CMD_JFFS2
2392 The default device to use with the jffs2 command.
2394 config JFFS2_PART_OFFSET
2395 hex "Default offset within flash to locate the JFFS2 image"
2396 depends on CMD_JFFS2
2399 The default offset within flash to locate the JFFS2 image.
2401 config JFFS2_PART_SIZE
2402 hex "Default size of JFFS2 partition"
2403 depends on CMD_JFFS2
2406 The default size of the JFFS2 partition
2409 bool "MTD partition support"
2412 MTD partitioning tool support.
2413 It is strongly encouraged to avoid using this command
2414 anymore along with 'sf', 'nand', 'onenand'. One can still
2415 declare the partitions in the mtdparts environment variable
2416 but better use the MTD stack and the 'mtd' command instead.
2418 config CMD_MTDPARTS_SPREAD
2419 bool "Padd partition size to take account of bad blocks"
2420 depends on CMD_MTDPARTS
2422 This enables the 'spread' sub-command of the mtdparts command.
2423 This command will modify the existing mtdparts variable by increasing
2424 the size of the partitions such that 1) each partition's net size is
2425 at least as large as the size specified in the mtdparts variable and
2426 2) each partition starts on a good block.
2428 config CMD_MTDPARTS_SHOW_NET_SIZES
2429 bool "Show net size (w/o bad blocks) of partitions"
2430 depends on CMD_MTDPARTS
2432 Adds two columns to the printed partition table showing the
2433 effective usable size of a partition, if bad blocks are taken
2436 config MTDIDS_DEFAULT
2437 string "Default MTD IDs"
2438 depends on MTD || SPI_FLASH
2440 Defines a default MTD IDs list for use with MTD partitions in the
2441 Linux MTD command line partitions format.
2443 config MTDPARTS_DEFAULT
2444 string "Default MTD partition scheme"
2445 depends on MTD || SPI_FLASH
2447 Defines a default MTD partitioning scheme in the Linux MTD command
2448 line partitions format
2451 bool "reiser - Access to reiserfs filesystems"
2453 This provides two commands which operate on a resierfs filesystem,
2454 commonly used some years ago:
2456 reiserls - list files
2457 reiserload - load a file
2460 bool "yaffs2 - Access of YAFFS2 filesystem"
2464 This provides commands for accessing a YAFFS2 filesystem. Yet
2465 Another Flash Filesystem 2 is a filesystem designed specifically
2466 for NAND flash. It incorporates bad-block management and ensures
2467 that device writes are sequential regardless of filesystem
2471 bool "zfs - Access of ZFS filesystem"
2473 This provides commands to accessing a ZFS filesystem, commonly used
2474 on Solaris systems. Two sub-commands are provided:
2476 zfsls - list files in a directory
2477 zfsload - load a file
2479 See doc/README.zfs for more details.
2483 menu "Debug commands"
2485 config CMD_CBSYSINFO
2488 default y if SYS_COREBOOT
2490 This provides information about the coreboot sysinfo table stored in
2491 memory by coreboot before jumping to U-Boot. It can be useful for
2492 debugging the beaaviour of coreboot or U-Boot.
2495 bool "diag - Board diagnostics"
2497 This command provides access to board diagnostic tests. These are
2498 called Power-on Self Tests (POST). The command allows listing of
2499 available tests and running either all the tests, or specific tests
2503 bool "event - Show information about events"
2504 default y if EVENT_DEBUG
2506 This enables the 'event' command which provides information about
2507 events and event-handler routines. This can help to device event
2511 bool "irq - Show information about interrupts"
2512 depends on !ARM && !MIPS && !RISCV && !SH
2514 This enables two commands:
2516 interrupts - enable or disable interrupts
2517 irqinfo - print device-specific interrupt information
2520 bool "kgdb - Allow debugging of U-Boot with gdb"
2523 This enables a 'kgdb' command which allows gdb to connect to U-Boot
2524 over a serial link for debugging purposes. This allows
2525 single-stepping, inspecting variables, etc. This is supported only
2526 on PowerPC at present.
2529 bool "log - Generation, control and access to logging"
2533 This provides access to logging features. It allows the output of
2534 log data to be controlled to a limited extent (setting up the default
2535 maximum log level for emitting of records). It also provides access
2536 to a command used for testing the log system.
2539 bool "trace - Support tracing of function calls and timing"
2543 Enables a command to control using of function tracing within
2544 U-Boot. This allows recording of call traces including timing
2545 information. The command can write data to memory for exporting
2546 for analysis (e.g. using bootchart). See doc/README.trace for full
2550 bool "avb - Android Verified Boot 2.0 operations"
2551 depends on AVB_VERIFY
2553 Enables a "avb" command to perform verification of partitions using
2554 Android Verified Boot 2.0 functionality. It includes such subcommands:
2555 avb init - initialize avb2 subsystem
2556 avb read_rb - read rollback index
2557 avb write_rb - write rollback index
2558 avb is_unlocked - check device lock state
2559 avb get_uuid - read and print uuid of a partition
2560 avb read_part - read data from partition
2561 avb read_part_hex - read data from partition and output to stdout
2562 avb write_part - write data to partition
2563 avb verify - run full verification chain
2565 config CMD_STACKPROTECTOR_TEST
2566 bool "Test command for stack protector"
2567 depends on STACKPROTECTOR
2569 Enable stackprot_test command
2570 The stackprot_test command will force a stack overrun to test
2571 the stack smashing detection mechanisms.
2576 tristate "Enable UBI - Unsorted block images commands"
2579 UBI is a software layer above MTD layer which admits use of LVM-like
2580 logical volumes on top of MTD devices, hides some complexities of
2581 flash chips like wear and bad blocks and provides some other useful
2582 capabilities. Please, consult the MTD web site for more details
2583 (www.linux-mtd.infradead.org). Activate this option if you want
2584 to use U-Boot UBI commands.
2585 It is also strongly encouraged to also enable CONFIG_MTD to get full
2588 config CMD_UBI_RENAME
2589 bool "Enable rename"
2592 Enable a "ubi" command to rename ubi volume:
2593 ubi rename <oldname> <newname>
2596 tristate "Enable UBIFS - Unsorted block images filesystem commands"
2598 default y if CMD_UBI
2602 UBIFS is a file system for flash devices which works on top of UBI.
2604 config MMC_SPEED_MODE_SET
2605 bool "set speed mode using mmc command"
2609 Enable setting speed mode using mmc rescan and mmc dev commands.
2610 The speed mode is provided as the last argument in these commands
2611 and is indicated using the index from enum bus_mode in
2612 include/mmc.h. A speed mode can be set only if it has already
2613 been enabled in the device tree.
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