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
189 Display and program the system EEPROM data block in ONIE Tlvinfo
190 format. TLV stands for Type-Length-Value.
192 config SPL_CMD_TLV_EEPROM
193 bool "tlv_eeprom for SPL"
194 depends on SPL_I2C_EEPROM
195 select SPL_DRIVERS_MISC
198 Read system EEPROM data block in ONIE Tlvinfo format from SPL.
202 depends on RISCV_SMODE && SBI_V02
204 Display information about the SBI implementation.
214 Run the command stored in the environment "bootcmd", i.e.
215 "bootd" does the same thing as "run bootcmd".
221 Boot an application image from the memory.
223 config CMD_BOOTM_PRE_LOAD
224 bool "enable pre-load on bootm"
226 depends on IMAGE_PRE_LOAD
229 Enable support of stage pre-load for the bootm command.
230 This stage allow to check or modify the image provided
231 to the bootm command.
236 default y if BOOTSTD_FULL
238 Support listing available bootdevs (boot devices) which can provide an
239 OS to boot, as well as showing information about a particular one.
241 This command is not necessary for bootstd to work.
248 Support scanning for bootflows available with the bootdevs. The
249 bootflows can optionally be booted.
251 config CMD_BOOTFLOW_FULL
252 bool "bootflow - extract subcommands"
253 depends on BOOTSTD_FULL
254 default y if BOOTSTD_FULL
256 Add the ability to list the available bootflows, select one and obtain
257 information about it.
259 This command is not necessary for bootstd to work.
264 default y if BOOTSTD_FULL
266 Support listing available bootmethds (methods used to boot an
267 Operating System), as well as selecting the order that the bootmeths
270 This command is not necessary for bootstd to work.
273 bool "Support booting UEFI FIT images"
274 depends on CMD_BOOTEFI && CMD_BOOTM && FIT
277 Support booting UEFI FIT images via the bootm command.
282 Boot the Linux zImage
286 depends on ARM64 || RISCV
289 Boot an AArch64 Linux Kernel image from memory.
292 bool "Support booting Linux OS images"
293 depends on CMD_BOOTM || CMD_BOOTZ || CMD_BOOTI
296 Support booting the Linux kernel directly via a command such as bootm
300 bool "Support booting NetBSD (non-EFI) loader images"
304 Support booting NetBSD via the bootm command.
306 config BOOTM_OPENRTOS
307 bool "Support booting OPENRTOS / FreeRTOS images"
310 Support booting OPENRTOS / FreeRTOS via the bootm command.
313 bool "Support booting Enea OSE images"
314 depends on (ARM && (ARM64 || CPU_V7A || CPU_V7R) || SANDBOX || PPC || X86)
317 Support booting Enea OSE images via the bootm command.
320 bool "Support booting Plan9 OS images"
324 Support booting Plan9 images via the bootm command.
327 bool "Support booting RTEMS OS images"
331 Support booting RTEMS images via the bootm command.
334 bool "Support booting VxWorks OS images"
338 Support booting VxWorks images via the bootm command.
341 hex "Maximum size of a decompresed OS image"
342 depends on CMD_BOOTM || CMD_BOOTI || CMD_BOOTZ
343 default 0x4000000 if PPC || ARM64
344 default 0x1000000 if X86 || ARCH_MX6 || ARCH_MX7
347 This is the maximum size of the buffer that is used to decompress the OS
348 image in to, if passing a compressed image to bootm/booti/bootz.
352 depends on EFI_LOADER
355 Boot an EFI image from memory.
357 config CMD_BOOTEFI_HELLO_COMPILE
358 bool "Compile a standard EFI hello world binary for testing"
359 depends on CMD_BOOTEFI && !CPU_V7M
362 This compiles a standard EFI hello world application with U-Boot so
363 that it can be used with the test/py testing framework. This is useful
364 for testing that EFI is working at a basic level, and for bringing
365 up EFI support on a new architecture.
367 No additional space will be required in the resulting U-Boot binary
368 when this option is enabled.
370 config CMD_BOOTEFI_HELLO
371 bool "Allow booting a standard EFI hello world for testing"
372 depends on CMD_BOOTEFI_HELLO_COMPILE
373 default y if CMD_BOOTEFI_SELFTEST
375 This adds a standard EFI hello world application to U-Boot so that
376 it can be used with the 'bootefi hello' command. This is useful
377 for testing that EFI is working at a basic level, and for bringing
378 up EFI support on a new architecture.
380 source lib/efi_selftest/Kconfig
387 Add an ANSI terminal boot menu command.
392 Android DTB/DTBO image manipulation commands. Read dtb/dtbo files from
393 image into RAM, dump image structure information, etc. Those dtb/dtbo
394 files should be merged in one dtb further, which needs to be passed to
395 the kernel, as part of a boot process.
399 depends on ANDROID_BOOT_IMAGE
401 Android Boot Image manipulation commands. Allows one to extract
402 images contained in boot.img, like kernel, ramdisk, dtb, etc, and
403 obtain corresponding meta-information from boot.img.
405 See doc/android/boot-image.rst for details.
408 bool "bootelf, bootvx"
412 Boot an ELF/vxWorks image from the memory.
415 bool "Flattened Device Tree utility commands"
419 Do FDT related setup before booting into the Operating System.
421 config SUPPORT_EXTENSION_SCAN
425 bool "Extension board management command"
427 depends on SUPPORT_EXTENSION_SCAN
429 Enables the "extension" command, which allows to detect
430 extension boards connected to the system, and apply
431 corresponding Device Tree overlays.
437 Start an application at a given address.
443 Run the command in the given environment variable.
449 Print header information for application image.
454 List all images found in flash
460 Extract a part of a multi-image.
463 bool "spl export - Export boot information for Falcon boot"
466 Falcon mode allows booting directly from SPL into an Operating
467 System such as Linux, thus skipping U-Boot proper. See
468 doc/README.falcon for full information about how to use this
471 config CMD_SPL_NAND_OFS
472 hex "Offset of OS args or dtb for Falcon-mode NAND boot"
473 depends on CMD_SPL && (TPL_NAND_SUPPORT || SPL_NAND_SUPPORT)
476 This provides the offset of the command line arguments for Linux
477 when booting from NAND in Falcon mode. See doc/README.falcon
478 for full information about how to use this option (and also see
479 board/gateworks/gw_ventana/README for an example).
481 config CMD_SPL_NOR_OFS
482 hex "Offset of OS args or dtb for Falcon-mode NOR boot"
483 depends on CMD_SPL && SPL_NOR_SUPPORT
486 This provides the offset of the command line arguments or dtb for
487 Linux when booting from NOR in Falcon mode.
489 config CMD_SPL_WRITE_SIZE
490 hex "Size of argument area"
494 This provides the size of the command-line argument area in NAND
495 flash used by Falcon-mode boot. See the documentation until CMD_SPL
498 config CMD_THOR_DOWNLOAD
499 bool "thor - TIZEN 'thor' download"
502 Implements the 'thor' download protocol. This is a way of
503 downloading a software update over USB from an attached host.
504 There is no documentation about this within the U-Boot source code
505 but you should be able to find something on the interwebs.
508 bool "zboot - x86 boot command"
510 With x86 machines it is common to boot a bzImage file which
511 contains both a kernel and a setup.bin file. The latter includes
512 configuration information from the dark ages which x86 boards still
513 need to pick things out of.
515 Consider using FIT in preference to this since it supports directly
516 booting both 32- and 64-bit kernels, as well as secure boot.
517 Documentation is available in doc/uImage.FIT/x86-fit-boot.txt
521 menu "Environment commands"
524 bool "ask for env variable"
526 Ask for environment variable
544 Edit environment variable.
549 Allow for searching environment variables
555 Save all environment variables into the compiled-in persistent
560 depends on CMD_SAVEENV
562 Erase environment variables from the compiled-in persistent
565 config CMD_ENV_EXISTS
569 Check if a variable is defined in the environment for use in
572 config CMD_ENV_CALLBACK
573 bool "env callbacks - print callbacks and their associated variables"
575 Some environment variable have callbacks defined by
576 U_BOOT_ENV_CALLBACK. These are called when the variable changes.
577 For example changing "baudrate" adjust the serial baud rate. This
578 command lists the currently defined callbacks.
581 bool "env flags -print variables that have non-default flags"
583 Some environment variables have special flags that control their
584 behaviour. For example, serial# can only be written once and cannot
585 be deleted. This command shows the variables that have special
588 config CMD_NVEDIT_EFI
589 bool "env [set|print] -e - set/print UEFI variables"
590 depends on EFI_LOADER
593 UEFI variables are encoded as some form of U-Boot variables.
594 If enabled, we are allowed to set/print UEFI variables using
595 "env" command with "-e" option without knowing details.
597 config CMD_NVEDIT_INDIRECT
598 bool "env indirect - Sets environment value from another"
600 config CMD_NVEDIT_INFO
601 bool "env info - print or evaluate environment information"
603 Print environment information:
604 - env_valid : is environment valid
605 - env_ready : is environment imported into hash table
606 - env_use_default : is default environment used
608 This command can be optionally used for evaluation in scripts:
609 [-d] : evaluate whether default environment is used
610 [-p] : evaluate whether environment can be persisted
612 The result of multiple evaluations will be combined with AND.
614 config CMD_NVEDIT_LOAD
617 Load all environment variables from the compiled-in persistent
620 config CMD_NVEDIT_SELECT
623 Select the compiled-in persistent storage of environment variables.
627 menu "Memory commands"
632 Compute binary operations (xor, or, and) of byte arrays of arbitrary
633 size from memory and store the result in memory or the environment.
637 default y if BLOBLIST
639 Show information about the bloblist, a collection of binary blobs
640 held in memory that persist between SPL and U-Boot. In the case of
641 x86 devices the bloblist can be used to hold ACPI tables so that they
642 remain available in memory.
655 Add -v option to verify data against a crc32 checksum.
658 bool "eeprom - EEPROM subsystem"
660 (deprecated, needs conversion to driver model)
661 Provides commands to read and write EEPROM (Electrically Erasable
662 Programmable Read Only Memory) chips that are connected over an
665 config CMD_EEPROM_LAYOUT
666 bool "Enable layout-aware eeprom commands"
667 depends on CMD_EEPROM
669 (deprecated, needs conversion to driver model)
670 When enabled, additional eeprom sub-commands become available.
672 eeprom print - prints the contents of the eeprom in a human-readable
673 way (eeprom layout fields, and data formatted to be fit for human
676 eeprom update - allows user to update eeprom fields by specifying
677 the field name, and providing the new data in a human readable format
678 (same format as displayed by the eeprom print command).
680 Both commands can either auto detect the layout, or be told which
684 __weak int parse_layout_version(char *str)
685 - override to provide your own layout name parsing
686 __weak void __eeprom_layout_assign(struct eeprom_layout *layout,
688 - override to setup the layout metadata based on the version
689 __weak int eeprom_layout_detect(unsigned char *data)
690 - override to provide your own algorithm for detecting layout
693 - contains various printing and updating functions for common
694 types of eeprom fields. Can be used for defining
697 config EEPROM_LAYOUT_HELP_STRING
698 string "Tells user what layout names are supported"
699 depends on CMD_EEPROM_LAYOUT
700 default "<not defined>"
702 Help printed with the LAYOUT VERSIONS part of the 'eeprom'
705 config SYS_I2C_EEPROM_BUS
706 int "I2C bus of the EEPROM device."
707 depends on CMD_EEPROM
710 config SYS_I2C_EEPROM_ADDR_LEN
711 int "Length in bytes of the EEPROM memory array address"
712 depends on CMD_EEPROM || ID_EEPROM
716 Note: This is NOT the chip address length!
718 config SYS_EEPROM_SIZE
719 depends on CMD_EEPROM
720 int "Size in bytes of the EEPROM device"
723 config SYS_EEPROM_PAGE_WRITE_BITS
724 int "Number of bits used to address bytes in a single page"
725 depends on CMD_EEPROM
728 The EEPROM page size is 2^SYS_EEPROM_PAGE_WRITE_BITS.
729 A 64 byte page, for example would require six bits.
731 config SYS_EEPROM_PAGE_WRITE_DELAY_MS
732 int "Number of milliseconds to delay between page writes"
733 depends on CMD_EEPROM || CMD_I2C
739 Infinite write loop on address range
745 Compute MD5 checksum.
749 depends on CMD_MD5SUM
751 Add -v option to verify data against an MD5 checksum.
756 Display memory information.
759 bool "md, mm, nm, mw, cp, cmp, base, loop"
764 mm - memory modify (auto-incrementing address)
765 nm - memory modify (constant address)
766 mw - memory write (fill)
769 base - print or set address offset
770 loop - initialize loop on address range
772 config CMD_MEM_SEARCH
773 bool "ms - Memory search"
775 Memory-search command
777 This allows searching through a region of memory looking for hex
778 data (byte, 16-bit word, 32-bit long, also 64-bit on machines that
779 support it). It is also possible to search for a string. The
780 command accepts a memory range and a list of values to search for.
781 The values need to appear in memory in the same order they are given
782 in the command. At most 10 matches can be returned at a time, but
783 pressing return will show the next 10 matches. Environment variables
784 are set for use with scripting (memmatches, memaddr, mempos).
787 bool "Enable cyclic md/mw commands"
788 depends on CMD_MEMORY
790 Add the "mdc" and "mwc" memory commands. These are cyclic
795 This command will print 4 bytes (10,11,12,13) each 500 ms.
797 => mwc.l 100 12345678 10
798 This command will write 12345678 to address 100 all 10 ms.
803 depends on CMD_MEMORY && (LIB_RAND || LIB_HW_RAND)
805 random - fill memory with random data
810 Simple RAM read/write test.
814 config SYS_ALT_MEMTEST
815 bool "Alternative test"
817 Use a more complete alternative memory test.
821 config SYS_ALT_MEMTEST_BITFLIP
825 The alternative memory test includes bitflip test since 2020.07.
826 The bitflip test significantly increases the overall test time.
827 Bitflip test can optionally be disabled here.
831 config SYS_MEMTEST_START
832 hex "default start address for mtest"
835 This is the default start address for mtest for simple read/write
836 test. If no arguments are given to mtest, default address is used
839 config SYS_MEMTEST_END
840 hex "default end address for mtest"
843 This is the default end address for mtest for simple read/write
844 test. If no arguments are given to mtest, default address is used
853 Compute SHA1 checksum.
855 config SHA1SUM_VERIFY
857 depends on CMD_SHA1SUM
859 Add -v option to verify data against a SHA1 checksum.
862 bool "strings - display strings in memory"
864 This works similarly to the Unix 'strings' command except that it
865 works with a memory range. String of printable characters found
866 within the range are displayed. The minimum number of characters
867 for a sequence to be considered a string can be provided.
871 menu "Compression commands"
875 default y if CMD_BOOTI
878 Support decompressing an LZMA (Lempel-Ziv-Markov chain algorithm)
883 default y if CMD_BOOTI
886 Support decompressing an LZ4 image from memory region.
890 default y if CMD_BOOTI
893 Uncompress a zip-compressed memory region.
897 select GZIP_COMPRESSED
899 Compress a memory region with zlib deflate method.
903 menu "Device access commands"
906 #depends on FLASH_CFI_DRIVER
909 ARM Ltd reference designs flash partition access
912 bool "adc - Access Analog to Digital Converters info and data"
914 depends on DM_REGULATOR
916 Shows ADC device info and permit printing one-shot analog converted
917 data from a named Analog to Digital Converter.
922 depends on PARTITIONS
924 Read/modify/write the fields of Bootloader Control Block, usually
925 stored on the flash "misc" partition with its structure defined in:
926 https://android.googlesource.com/platform/bootable/recovery/+/master/
927 bootloader_message/include/bootloader_message/bootloader_message.h
929 Some real-life use-cases include (but are not limited to):
930 - Determine the "boot reason" (and act accordingly):
931 https://source.android.com/devices/bootloader/boot-reason
932 - Get/pass a list of commands from/to recovery:
933 https://android.googlesource.com/platform/bootable/recovery
934 - Inspect/dump the contents of the BCB fields
937 bool "bind/unbind - Bind or unbind a device to/from a driver"
940 Bind or unbind a device to/from a driver from the command line.
941 This is useful in situations where a device may be handled by several
942 drivers. For example, this can be used to bind a UDC to the usb ether
943 gadget driver from the command line.
946 bool "clk - Show clock frequencies"
949 Shows clock frequences by calling a sock_clk_dump() hook function.
950 This is depreated in favour of using the CLK uclass and accessing
951 clock values from associated drivers. However currently no command
955 bool "demo - Demonstration commands for driver model"
958 Provides a 'demo' command which can be used to play around with
959 driver model. To use this properly you will need to enable one or
960 both of the demo devices (DM_DEMO_SHAPE and DM_DEMO_SIMPLE).
961 Otherwise you will always get an empty list of devices. The demo
962 devices are defined in the sandbox device tree, so the easiest
963 option is to use sandbox and pass the -d point to sandbox's
970 Enables the command "dfu" which is used to have U-Boot create a DFU
971 class device via USB. This command requires that the "dfu_alt_info"
972 environment variable be set and define the alt settings to expose to
976 bool "dm - Access to driver model information"
979 Provides access to driver model data structures and information,
980 such as a list of devices, list of uclasses and the state of each
981 device (e.g. activated). This is not required for operation, but
982 can be useful to see the state of driver model for debugging or
986 bool "fastboot - Android fastboot support"
989 This enables the command "fastboot" which enables the Android
990 fastboot mode for the platform. Fastboot is a protocol for
991 downloading images, flashing and device control used on
992 Android devices. Fastboot requires either the network stack
993 enabled or support for acting as a USB device.
995 See doc/android/fastboot.rst for more information.
998 bool "flinfo, erase, protect"
1000 depends on MTD || FLASH_CFI_DRIVER || MTD_NOR_FLASH
1003 flinfo - print FLASH memory information
1004 erase - FLASH memory
1005 protect - enable or disable FLASH write protection
1014 config CMD_FPGA_LOADBP
1015 bool "fpga loadbp - load partial bitstream (Xilinx only)"
1018 Supports loading an FPGA device from a bitstream buffer containing
1019 a partial bitstream.
1021 config CMD_FPGA_LOADFS
1022 bool "fpga loadfs - load bitstream from FAT filesystem (Xilinx only)"
1025 Supports loading an FPGA device from a FAT filesystem.
1027 config CMD_FPGA_LOADMK
1028 bool "fpga loadmk - load bitstream from image"
1031 Supports loading an FPGA device from a image generated by mkimage.
1033 config CMD_FPGA_LOADP
1034 bool "fpga loadp - load partial bitstream"
1037 Supports loading an FPGA device from a bitstream buffer containing
1038 a partial bitstream.
1040 config CMD_FPGA_LOAD_SECURE
1041 bool "fpga loads - loads secure bitstreams"
1043 select FPGA_LOAD_SECURE
1045 Enables the fpga loads command which is used to load secure
1046 (authenticated or encrypted or both) bitstreams on to FPGA.
1049 bool "fpgad - dump FPGA registers"
1051 (legacy, needs conversion to driver model)
1052 Provides a way to dump FPGA registers by calling the board-specific
1053 fpga_get_reg() function. This functions similarly to the 'md'
1057 bool "fuse - support for the fuse subssystem"
1059 (deprecated - needs conversion to driver model)
1060 This allows reading, sensing, programming or overriding fuses
1061 which control the behaviour of the device. The command uses the
1069 config CMD_GPIO_READ
1070 bool "gpio read - save GPIO value to variable"
1073 Enables the 'gpio read' command that saves the value
1074 of a GPIO pin to a variable.
1080 Control PWM channels, this allows invert/config/enable/disable PWM channels.
1083 bool "GPT (GUID Partition Table) command"
1084 select EFI_PARTITION
1085 select HAVE_BLOCK_DEVICE
1086 select PARTITION_UUIDS
1089 Enable the 'gpt' command to ready and write GPT style partition
1093 bool "GPT Random UUID generation"
1096 Enable the generation of partitions with random UUIDs if none
1099 config CMD_GPT_RENAME
1100 bool "GPT partition renaming commands"
1103 Enables the 'gpt' command to interchange names on two GPT
1104 partitions via the 'gpt swap' command or to rename single
1105 partitions via the 'rename' command.
1108 bool "ide - Support for IDE drivers"
1111 Provides an 'ide' command which allows accessing the IDE drive,
1112 resetting the IDE interface, printing the partition table and
1113 geting device info. It also enables the 'diskboot' command which
1114 permits booting from an IDE drive.
1117 bool "io - Support for performing I/O accesses"
1119 Provides an 'iod' command to display I/O space and an 'iow' command
1120 to write values to the I/O space. This can be useful for manually
1121 checking the state of devices during boot when debugging device
1125 bool "iotrace - Support for tracing I/O activity"
1127 Provides an 'iotrace' command which supports recording I/O reads and
1128 writes in a trace buffer in memory . It also maintains a checksum
1129 of the trace records (even if space is exhausted) so that the
1130 sequence of I/O accesses can be verified.
1132 When debugging drivers it is useful to see what I/O accesses were
1133 done and in what order.
1135 Even if the individual accesses are of little interest it can be
1136 useful to verify that the access pattern is consistent each time
1137 an operation is performed. In this case a checksum can be used to
1138 characterise the operation of a driver. The checksum can be compared
1139 across different runs of the operation to verify that the driver is
1142 In particular, when performing major refactoring of the driver, where
1143 the access pattern should not change, the checksum provides assurance
1144 that the refactoring work has not broken the driver.
1146 This works by sneaking into the io.h heder for an architecture and
1147 redirecting I/O accesses through iotrace's tracing mechanism.
1149 For now no commands are provided to examine the trace buffer. The
1150 format is fairly simple, so 'md' is a reasonable substitute.
1152 Note: The checksum feature is only useful for I/O regions where the
1153 contents do not change outside of software control. Where this is not
1154 suitable you can fall back to manually comparing the addresses. It
1155 might be useful to enhance tracing to only checksum the accesses and
1156 not the data read/written.
1166 bool "w1 - Support for Dallas 1-Wire protocol"
1168 Dallas 1-wire protocol support
1174 Load a binary file over serial line.
1179 Load a binary over memory mapped.
1185 Load an S-Record file over serial line
1189 bool "lsblk - list block drivers and devices"
1191 Print list of available block device drivers, and for each, the list
1192 of known block devices.
1195 bool "MBR (Master Boot Record) command"
1196 select DOS_PARTITION
1197 select HAVE_BLOCK_DEVICE
1199 Enable the 'mbr' command to ready and write MBR (Master Boot Record)
1200 style partition tables.
1206 Enable the command "misc" for accessing miscellaneous devices with
1207 a MISC uclass driver. The command provides listing all MISC devices
1208 as well as read and write functionalities via their drivers.
1214 MMC memory mapped support.
1218 config CMD_BKOPS_ENABLE
1219 bool "mmc bkops enable"
1222 Enable command for setting manual background operations handshake
1223 on a eMMC device. The feature is optionally available on eMMC devices
1224 conforming to standard >= 4.41.
1227 bool "Enable support for RPMB in the mmc command"
1228 depends on SUPPORT_EMMC_RPMB
1230 Enable the commands for reading, writing and programming the
1231 key for the Replay Protection Memory Block partition in eMMC.
1233 config CMD_MMC_SWRITE
1235 depends on MMC_WRITE
1238 Enable support for the "mmc swrite" command to write Android sparse
1247 Enable storage cloning over block devices, useful for
1248 initial flashing by external block device without network
1251 config CMD_OPTEE_RPMB
1252 bool "Enable read/write support on RPMB via OPTEE"
1253 depends on SUPPORT_EMMC_RPMB && OPTEE
1255 Enable the commands for reading, writing persistent named values
1256 in the Replay Protection Memory Block partition in eMMC by
1257 using Persistent Objects in OPTEE
1262 select MTD_PARTITIONS
1264 MTD commands support.
1268 depends on MULTIPLEXER
1270 List, select, and deselect mux controllers on the fly.
1274 default y if NAND_SUNXI
1275 depends on MTD_RAW_NAND
1280 config CMD_NAND_TRIMFFS
1281 bool "nand write.trimffs"
1282 default y if ARCH_SUNXI
1284 Allows one to skip empty pages when flashing something on a NAND.
1286 config CMD_NAND_LOCK_UNLOCK
1287 bool "nand lock/unlock"
1289 NAND locking support.
1291 config CMD_NAND_TORTURE
1294 NAND torture support.
1303 NVM Express device support
1306 bool "onenand - access to onenand device"
1309 OneNAND is a brand of NAND ('Not AND' gate) flash which provides
1310 various useful features. This command allows reading, writing,
1311 and erasing blocks. It allso provides a way to show and change
1312 bad blocks, and test the device.
1314 config USE_ONENAND_BOARD_INIT
1315 bool "Call onenand_board_init() in the onenand command"
1316 depends on CMD_ONENAND
1321 Enable the 'osd' command which allows to query information from and
1322 write text data to a on-screen display (OSD) device; a virtual device
1323 associated with a display capable of displaying a text overlay on the
1324 display it's associated with..
1328 depends on PARTITIONS
1329 select HAVE_BLOCK_DEVICE
1330 select PARTITION_UUIDS
1332 Read and display information about the partition table on
1336 bool "pci - Access PCI devices"
1338 Provide access to PCI (Peripheral Interconnect Bus), a type of bus
1339 used on some devices to allow the CPU to communicate with its
1340 peripherals. Sub-commands allow bus enumeration, displaying and
1341 changing configuration space and a few other features.
1344 bool "pinmux - show pins muxing"
1346 default y if PINCTRL
1348 Parse all available pin-controllers and show pins muxing. This
1349 is useful for debug purpoer to check the pin muxing and to know if
1350 a pin is configured as a GPIO or as an alternate function.
1355 Poweroff/Shutdown the system
1358 bool "read - Read binary data from a partition"
1360 Provides low-level access to the data in a partition.
1362 config CMD_REMOTEPROC
1364 depends on REMOTEPROC
1366 Support for Remote Processor control
1369 bool "sata - Access SATA subsystem"
1372 SATA (Serial Advanced Technology Attachment) is a serial bus
1373 standard for connecting to hard drives and other storage devices.
1374 This command provides information about attached devices and allows
1375 reading, writing and other operations.
1377 SATA replaces PATA (originally just ATA), which stands for Parallel AT
1378 Attachment, where AT refers to an IBM AT (Advanced Technology)
1379 computer released in 1984.
1382 bool "saves - Save a file over serial in S-Record format"
1384 Provides a way to save a binary file using the Motorola S-Record
1385 format over the serial line.
1388 bool "scsi - Access to SCSI devices"
1391 This provides a 'scsi' command which provides access to SCSI (Small
1392 Computer System Interface) devices. The command provides a way to
1393 scan the bus, reset the bus, read and write data and get information
1397 bool "sdram - Print SDRAM configuration information"
1399 Provides information about attached SDRAM. This assumed that the
1400 SDRAM has an EEPROM with information that can be read using the
1401 I2C bus. This is only available on some boards.
1405 depends on DM_SPI_FLASH || SPI_FLASH
1406 default y if DM_SPI_FLASH
1411 bool "sf test - Allow testing of SPI flash"
1414 Provides a way to test that SPI flash is working correctly. The
1415 test is destructive, in that an area of SPI flash must be provided
1416 for the test to use. Performance information is also provided,
1417 measuring the performance of reading, writing and erasing in
1418 Mbps (Million Bits Per Second). This value should approximately
1419 equal the SPI bus speed for a single-bit-wide SPI bus, assuming
1420 everything is working properly.
1423 bool "sspi - Command to access spi device"
1426 SPI utility command.
1428 config DEFAULT_SPI_BUS
1429 int "default spi bus used by sspi command"
1433 config DEFAULT_SPI_MODE
1434 hex "default spi mode used by sspi command (see include/spi.h)"
1439 bool "tsi148 - Command to access tsi148 device"
1441 This provides various sub-commands to initialise and configure the
1442 Turndra tsi148 device. See the command help for full details.
1445 bool "Enable UFS - Universal Flash Subsystem commands"
1448 "This provides commands to initialise and configure universal flash
1452 bool "universe - Command to set up the Turndra Universe controller"
1454 This allows setting up the VMEbus provided by this controller.
1455 See the command help for full details.
1460 select HAVE_BLOCK_DEVICE
1466 select USB_FUNCTION_SDP
1468 Enables the command "sdp" which is used to have U-Boot emulating the
1469 Serial Download Protocol (SDP) via USB.
1473 depends on USB_FUNCTION_ROCKUSB
1475 Rockusb protocol is widely used by Rockchip SoC based devices. It can
1476 read/write info, image to/from devices. This enable rockusb command
1477 support to communication with rockusb device. for more detail about
1478 this command, please read doc/README.rockusb.
1480 config CMD_USB_MASS_STORAGE
1481 bool "UMS usb mass storage"
1482 depends on USB_GADGET_DOWNLOAD
1483 select USB_FUNCTION_MASS_STORAGE
1484 depends on BLK && USB_GADGET
1486 Enables the command "ums" and the USB mass storage support to the
1487 export a block device: U-Boot, the USB device, acts as a simple
1488 external hard drive plugged on the host USB port.
1491 bool "Xen para-virtualized block device"
1495 Xen para-virtualized block device support
1500 depends on HAVE_BLOCK_DEVICE
1503 VirtIO block device support
1509 This provides commands to control the watchdog timer devices.
1515 Enable the command "axi" for accessing AXI (Advanced eXtensible
1516 Interface) busses, a on-chip interconnect specification for managing
1517 functional blocks in SoC designs, which is also often used in designs
1518 involving FPGAs (e.g. communication with IP cores in Xilinx FPGAs).
1522 menu "Shell scripting commands"
1528 Echo args to console
1534 Return true/false on integer compare.
1540 Run script from memory
1546 Evaluate boolean and math expressions and store the result in an env
1548 Also supports loading the value at a memory location into a variable.
1549 If CONFIG_REGEX is enabled, setexpr also supports a gsub function.
1551 config CMD_SETEXPR_FMT
1553 depends on CMD_SETEXPR
1555 Evaluate format string expression and store result in an environment
1560 menu "Android support commands"
1562 config CMD_AB_SELECT
1564 depends on ANDROID_AB
1566 On Android devices with more than one boot slot (multiple copies of
1567 the kernel and system images) this provides a command to select which
1568 slot should be used to boot from and register the boot attempt. This
1569 is used by the new A/B update model where one slot is updated in the
1570 background while running from the other slot.
1577 bool "Network commands"
1587 bootp - boot image via network using BOOTP/TFTP protocol
1591 depends on CMD_BOOTP
1593 Boot image via network using DHCP/TFTP protocol
1595 config BOOTP_MAY_FAIL
1596 bool "Allow for the BOOTP/DHCP server to not be found"
1597 depends on CMD_BOOTP
1599 If the DHCP server is not found after the configured retry count, the
1600 call will fail instead of starting over. This can be used to fail
1601 over to Link-local IP address configuration if the DHCP server is not
1604 config BOOTP_BOOTPATH
1605 bool "Request & store 'rootpath' from BOOTP/DHCP server"
1607 depends on CMD_BOOTP
1609 Even though the config is called BOOTP_BOOTPATH, it stores the
1610 path in the variable 'rootpath'.
1612 config BOOTP_VENDOREX
1613 bool "Support vendor extensions from BOOTP/DHCP server"
1614 depends on CMD_BOOTP
1616 config BOOTP_BOOTFILESIZE
1617 bool "Request & store 'bootfilesize' from BOOTP/DHCP server"
1618 depends on CMD_BOOTP
1621 bool "Request & store 'dnsip' from BOOTP/DHCP server"
1623 depends on CMD_BOOTP
1625 The primary DNS server is stored as 'dnsip'. If two servers are
1626 returned, you must set BOOTP_DNS2 to store that second server IP
1630 bool "Store 'dnsip2' from BOOTP/DHCP server"
1631 depends on BOOTP_DNS
1633 If a DHCP client requests the DNS server IP from a DHCP server,
1634 it is possible that more than one DNS serverip is offered to the
1635 client. If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS
1636 server IP will be stored in the additional environment
1637 variable "dnsip2". The first DNS serverip is always
1638 stored in the variable "dnsip", when BOOTP_DNS is defined.
1640 config BOOTP_GATEWAY
1641 bool "Request & store 'gatewayip' from BOOTP/DHCP server"
1643 depends on CMD_BOOTP
1645 config BOOTP_HOSTNAME
1646 bool "Request & store 'hostname' from BOOTP/DHCP server"
1648 depends on CMD_BOOTP
1650 The name may or may not be qualified with the local domain name.
1652 config BOOTP_PREFER_SERVERIP
1653 bool "serverip variable takes precedent over DHCP server IP."
1654 depends on CMD_BOOTP
1656 By default a BOOTP/DHCP reply will overwrite the 'serverip' variable.
1658 With this option enabled, the 'serverip' variable in the environment
1659 takes precedence over DHCP server IP and will only be set by the DHCP
1660 server if not already set in the environment.
1662 config BOOTP_SUBNETMASK
1663 bool "Request & store 'netmask' from BOOTP/DHCP server"
1665 depends on CMD_BOOTP
1667 config BOOTP_NISDOMAIN
1668 bool "Request & store 'nisdomain' from BOOTP/DHCP server"
1669 depends on CMD_BOOTP
1671 config BOOTP_NTPSERVER
1672 bool "Request & store 'ntpserverip' from BOOTP/DHCP server"
1673 depends on CMD_BOOTP
1675 config BOOTP_TIMEOFFSET
1676 bool "Request & store 'timeoffset' from BOOTP/DHCP server"
1677 depends on CMD_BOOTP && CMD_SNTP
1682 Selecting this will allow capturing all Ethernet packets and store
1683 them in physical memory in a PCAP formated file,
1684 later to be analyzed by PCAP reader application (IE. WireShark).
1687 bool "Send PXE client arch to BOOTP/DHCP server"
1689 depends on CMD_BOOTP && CMD_PXE
1691 Supported for ARM, ARM64, and x86 for now.
1693 config BOOTP_PXE_CLIENTARCH
1695 depends on BOOTP_PXE
1696 default 0x16 if ARM64
1700 config BOOTP_VCI_STRING
1702 depends on CMD_BOOTP
1703 default "U-Boot.armv7" if CPU_V7A || CPU_V7M || CPU_V7R
1704 default "U-Boot.armv8" if ARM64
1705 default "U-Boot.arm" if ARM
1712 tftpboot - boot image via network using TFTP protocol
1716 depends on CMD_TFTPBOOT
1718 TFTP put command, for uploading files to a server
1722 depends on CMD_TFTPBOOT
1724 Act as a TFTP server and boot the first received file
1726 config NET_TFTP_VARS
1727 bool "Control TFTP timeout and count through environment"
1728 depends on CMD_TFTPBOOT
1731 If set, allows controlling the TFTP timeout through the
1732 environment variable tftptimeout, and the TFTP maximum
1733 timeout count through the variable tftptimeoutcountmax.
1734 If unset, timeout and maximum are hard-defined as 1 second
1735 and 10 timouts per TFTP transfer.
1740 Boot image via network using RARP/TFTP protocol
1746 Boot image via network using NFS protocol.
1749 int "Timeout in milliseconds for NFS mounts"
1753 Timeout in milliseconds used in NFS protocol. If you encounter
1754 "ERROR: Cannot umount" in nfs command, try longer timeout such as
1757 config SYS_DISABLE_AUTOLOAD
1758 bool "Disable automatically loading files over the network"
1759 depends on CMD_BOOTP || CMD_DHCP || CMD_NFS || CMD_RARP
1761 Typically, commands such as "dhcp" will attempt to automatically
1762 load a file from the network, once the initial network configuration
1763 is complete. Enable this option to disable this behavior and instead
1764 require files to be loaded over the network by subsequent commands.
1770 If set, allows 802.3(clause 22) MII Management functions interface access
1771 The management interface specified in Clause 22 provides
1772 a simple, two signal, serial interface to connect a
1773 Station Management entity and a managed PHY for providing access
1774 to management parameters and services.
1775 The interface is referred to as the MII management interface.
1778 bool "Call mii_init() in the mii command"
1779 depends on CMD_MII && (MPC8XX_FEC || FSLDMAFE || MCFFEC)
1785 If set, allows Enable 802.3(clause 45) MDIO interface registers access
1786 The MDIO interface is orthogonal to the MII interface and extends
1787 it by adding access to more registers through indirect addressing.
1792 Send ICMP ECHO_REQUEST to network host
1797 Perform CDP network configuration
1803 Synchronize RTC via network
1808 Lookup the IP of a hostname
1810 config CMD_LINK_LOCAL
1814 Acquire a network IP address using the link-local protocol
1821 Allow control of L2 Ethernet switch commands. These are supported
1822 by the vsc9953 Ethernet driver at present. Sub-commands allow
1823 operations such as enabling / disabling a port and
1824 viewing/maintaining the filtering database (FDB)
1830 Boot image via network using PXE protocol
1835 Wait for wake-on-lan Magic Packet
1839 menu "Misc commands"
1842 bool "Enable 'bmp' command"
1843 depends on LCD || DM_VIDEO || VIDEO
1845 This provides a way to obtain information about a BMP-format image
1846 and to display it. BMP (which presumably stands for BitMaP) is a
1847 file format defined by Microsoft which supports images of various
1848 depths, formats and compression methods. Headers on the file
1849 determine the formats used. This command can be used by first loading
1850 the image into RAM, then using this command to look at it or display
1853 config CMD_BOOTCOUNT
1855 depends on BOOTCOUNT_LIMIT
1857 Enable the bootcount command, which allows interrogation and
1858 reset of the bootcounter.
1861 bool "Enable board-specific commands"
1863 (deprecated: instead, please define a Kconfig option for each command)
1865 Some boards have board-specific commands which are only enabled
1866 during developemnt and need to be turned off for production. This
1867 option provides a way to control this. The commands that are enabled
1868 vary depending on the board.
1870 config CMD_BLOCK_CACHE
1871 bool "blkcache - control and stats for block cache"
1872 depends on BLOCK_CACHE
1873 default y if BLOCK_CACHE
1875 Enable the blkcache command, which can be used to control the
1876 operation of the cache functions.
1877 This is most useful when fine-tuning the operation of the cache
1878 during development, but also allows the cache to be disabled when
1879 it might hurt performance (e.g. when using the ums command).
1886 Enable the 'button' command which allows to get the status of
1887 buttons supported by the board. The buttonss can be listed with
1888 'button list' and state can be known with 'button <label>'.
1889 Any button drivers can be controlled with this command, e.g.
1893 bool "icache or dcache"
1895 Enable the "icache" and "dcache" commands
1897 config CMD_CONITRACE
1898 bool "conitrace - trace console input codes"
1900 Enable the 'conitrace' command which displays the codes received
1901 from the console input as hexadecimal numbers.
1904 bool "Enable clear screen command 'cls'"
1905 depends on DM_VIDEO || LCD || VIDEO
1908 Enable the 'cls' command which clears the screen contents
1909 on video frame buffer.
1912 bool "efidebug - display/configure UEFI environment"
1913 depends on EFI_LOADER
1914 select EFI_DEVICE_PATH_TO_TEXT
1916 Enable the 'efidebug' command which provides a subset of UEFI
1917 shell utility with simplified functionality. It will be useful
1918 particularly for managing boot parameters as well as examining
1919 various EFI status for debugging.
1921 config CMD_EXCEPTION
1922 bool "exception - raise exception"
1923 depends on ARM || RISCV || SANDBOX || X86
1925 Enable the 'exception' command which allows to raise an exception.
1932 Enable the 'led' command which allows for control of LEDs supported
1933 by the board. The LEDs can be listed with 'led list' and controlled
1934 with led on/off/togle/blink. Any LED drivers can be controlled with
1935 this command, e.g. led_gpio.
1942 Enable the 'date' command for getting/setting the time/date in RTC
1949 Enable the 'rtc' command for low-level access to RTC devices.
1954 Run commands and summarize execution time.
1957 bool "gettime - read elapsed time"
1959 Enable the 'gettime' command which reads the elapsed time since
1960 U-Boot started running. This shows the time in seconds and
1961 milliseconds. See also the 'bootstage' command which provides more
1962 flexibility for boot timing.
1967 default y if SANDBOX
1970 Print bytes from the hardware random number generator.
1972 config CMD_KASLRSEED
1976 Set the kaslr-seed in the chosen node with entropy provided by a
1977 hardware random number generator.
1983 Delay execution for some time
1986 bool "support for multiprocessor commands"
1990 This enables commands to bringup different processors
1991 in multiprocessor cases.
1996 Access the system timer.
2002 This provides basic access to the U-Boot's sound support. The main
2003 feature is to play a beep.
2005 sound init - set up sound system
2006 sound play - play a sound
2012 Boot image via local extlinux.conf file
2018 This provides access to the QEMU firmware interface. The main
2019 feature is to allow easy loading of files passed to qemu-system
2020 via -kernel / -initrd
2025 This provides access to Linux PStore with Rammoops backend. The main
2026 feature is to allow to display or save PStore records.
2028 See doc/pstore.rst for more information.
2032 config CMD_PSTORE_MEM_ADDR
2033 hex "Memory Address"
2034 depends on CMD_PSTORE
2036 Base addr used for PStore ramoops memory, should be identical to
2037 ramoops.mem_address parameter used by kernel
2039 config CMD_PSTORE_MEM_SIZE
2041 depends on CMD_PSTORE
2044 Size of PStore ramoops memory, should be identical to ramoops.mem_size
2045 parameter used by kernel, a power of 2 and larger than the sum of the
2048 config CMD_PSTORE_RECORD_SIZE
2049 hex "Dump record size"
2050 depends on CMD_PSTORE
2053 Size of each dump done on oops/panic, should be identical to
2054 ramoops.record_size parameter used by kernel and a power of 2
2057 config CMD_PSTORE_CONSOLE_SIZE
2058 hex "Kernel console log size"
2059 depends on CMD_PSTORE
2062 Size of kernel console log, should be identical to
2063 ramoops.console_size parameter used by kernel and a power of 2
2066 config CMD_PSTORE_FTRACE_SIZE
2067 hex "FTrace log size"
2068 depends on CMD_PSTORE
2071 Size of ftrace log, should be identical to ramoops.ftrace_size
2072 parameter used by kernel and a power of 2
2074 config CMD_PSTORE_PMSG_SIZE
2075 hex "User space message log size"
2076 depends on CMD_PSTORE
2079 Size of user space message log, should be identical to
2080 ramoops.pmsg_size parameter used by kernel and a power of 2
2082 config CMD_PSTORE_ECC_SIZE
2084 depends on CMD_PSTORE
2087 if non-zero, the option enables ECC support and specifies ECC buffer
2088 size in bytes (1 is a special value, means 16 bytes ECC), should be
2089 identical to ramoops.ramoops_ecc parameter used by kernel
2093 source "cmd/mvebu/Kconfig"
2096 bool "terminal - provides a way to attach a serial terminal"
2098 Provides a 'cu'-like serial terminal command. This can be used to
2099 access other serial ports from the system console. The terminal
2100 is very simple with no special processing of characters. As with
2101 cu, you can press ~. (tilde followed by period) to exit.
2104 bool "uuid, guid - generation of unique IDs"
2107 This enables two commands:
2109 uuid - generate random Universally Unique Identifier
2110 guid - generate Globally Unique Identifier based on random UUID
2112 The two commands are very similar except for the endianness of the
2117 source "cmd/ti/Kconfig"
2119 config CMD_BOOTSTAGE
2120 bool "Enable the 'bootstage' command"
2121 depends on BOOTSTAGE
2123 Add a 'bootstage' command which supports printing a report
2124 and un/stashing of bootstage data.
2126 menu "Power commands"
2128 bool "Enable Driver Model PMIC command"
2131 This is the pmic command, based on a driver model pmic's API.
2132 Command features are unchanged:
2133 - list - list pmic devices
2134 - pmic dev <id> - show or [set] operating pmic device (NEW)
2135 - pmic dump - dump registers
2136 - pmic read address - read byte of register at address
2137 - pmic write address - write byte to register at address
2138 The only one change for this command is 'dev' subcommand.
2140 config CMD_REGULATOR
2141 bool "Enable Driver Model REGULATOR command"
2142 depends on DM_REGULATOR
2144 This command is based on driver model regulator's API.
2145 User interface features:
2146 - list - list regulator devices
2147 - regulator dev <id> - show or [set] operating regulator device
2148 - regulator info - print constraints info
2149 - regulator status - print operating status
2150 - regulator value <val] <-f> - print/[set] voltage value [uV]
2151 - regulator current <val> - print/[set] current value [uA]
2152 - regulator mode <id> - print/[set] operating mode id
2153 - regulator enable - enable the regulator output
2154 - regulator disable - disable the regulator output
2156 The '-f' (force) option can be used for set the value which exceeds
2157 the limits, which are found in device-tree and are kept in regulator's
2158 uclass plat structure.
2162 menu "Security commands"
2164 bool "Enable the 'aes' command"
2167 This provides a means to encrypt and decrypt data using the AES
2168 (Advanced Encryption Standard). This algorithm uses a symetric key
2169 and is widely used as a streaming cipher. Different key lengths are
2170 supported by the algorithm but this command only supports 128 bits
2174 bool "Enable the 'blob' command"
2175 depends on !MX6ULL && !MX6SLL && !MX6SL
2176 select IMX_HAB if ARCH_MX6 || ARCH_MX7 || ARCH_MX7ULP || ARCH_IMX8M
2178 This is used with the Freescale secure boot mechanism.
2180 Freescale's SEC block has built-in Blob Protocol which provides
2181 a method for protecting user-defined data across system power
2182 cycles. SEC block protects data in a data structure called a Blob,
2183 which provides both confidentiality and integrity protection.
2185 Encapsulating data as a blob
2186 Each time that the Blob Protocol is used to protect data, a
2187 different randomly generated key is used to encrypt the data.
2188 This random key is itself encrypted using a key which is derived
2189 from SoC's non-volatile secret key and a 16 bit Key identifier.
2190 The resulting encrypted key along with encrypted data is called a
2191 blob. The non-volatile secure key is available for use only during
2194 During decapsulation, the reverse process is performed to get back
2198 blob enc - encapsulating data as a cryptgraphic blob
2199 blob dec - decapsulating cryptgraphic blob to get the data
2203 blob enc src dst len km
2205 Encapsulate and create blob of data $len bytes long
2206 at address $src and store the result at address $dst.
2207 $km is the 16 byte key modifier is also required for
2208 generation/use as key for cryptographic operation. Key
2209 modifier should be 16 byte long.
2211 blob dec src dst len km
2213 Decapsulate the blob of data at address $src and
2214 store result of $len byte at addr $dst.
2215 $km is the 16 byte key modifier is also required for
2216 generation/use as key for cryptographic operation. Key
2217 modifier should be 16 byte long.
2220 bool "Support 'hash' command"
2223 This provides a way to hash data in memory using various supported
2224 algorithms (such as SHA1, MD5, CRC32). The computed digest can be
2225 saved to memory or to an environment variable. It is also possible
2226 to verify a hash against data in memory.
2229 bool "Support the 'hvc' command"
2230 depends on ARM_SMCCC
2232 Allows issuing Hypervisor Calls (HVCs). Mostly useful for
2233 development and testing.
2236 bool "Support the 'smc' command"
2237 depends on ARM_SMCCC
2239 Allows issuing Secure Monitor Calls (SMCs). Mostly useful for
2240 development and testing.
2246 Add -v option to verify data against a hash.
2249 bool "scp03 - SCP03 enable and rotate/provision operations"
2252 This command provides access to a Trusted Application
2253 running in a TEE to request Secure Channel Protocol 03
2254 (SCP03) enablement and/or rotation of its SCP03 keys.
2263 bool "Enable the 'tpm' command"
2264 depends on TPM_V1 || TPM_V2
2265 select CMD_TPM_V1 if TPM_V1
2266 select CMD_TPM_V2 if TPM_V2
2268 This provides a means to talk to a TPM from the command line. A wide
2269 range of commands if provided - see 'tpm help' for details. The
2270 command requires a suitable TPM on your board and the correct driver
2276 bool "Enable the 'tpm test' command"
2279 This provides a a series of tests to confirm that the TPMv1.x is
2280 working correctly. The tests cover initialisation, non-volatile RAM,
2281 extend, global lock and checking that timing is within expectations.
2282 The tests pass correctly on Infineon TPMs but may need to be adjusted
2289 menu "Firmware commands"
2291 bool "Enable crosec command"
2295 Enable command-line access to the Chrome OS EC (Embedded
2296 Controller). This provides the 'crosec' command which has
2297 a number of sub-commands for performing EC tasks such as
2298 updating its flash, accessing a small saved context area
2299 and talking to the I2C bus behind the EC (if there is one).
2302 menu "Filesystem commands"
2304 bool "Enable the 'btrsubvol' command"
2307 This enables the 'btrsubvol' command to list subvolumes
2308 of a BTRFS filesystem. There are no special commands for
2309 listing BTRFS directories or loading BTRFS files - this
2310 can be done by the generic 'fs' commands (see CMD_FS_GENERIC)
2311 when BTRFS is enabled (see FS_BTRFS).
2314 bool "Enable the 'cbfs' command"
2317 Define this to enable support for reading from a Coreboot
2318 filesystem. This is a ROM-based filesystem used for accessing files
2319 on systems that use coreboot as the first boot-loader and then load
2320 U-Boot to actually boot the Operating System. Available commands are
2321 cbfsinit, cbfsinfo, cbfsls and cbfsload.
2324 bool "Enable the 'cramfs' command"
2325 depends on FS_CRAMFS
2327 This provides commands for dealing with CRAMFS (Compressed ROM
2328 filesystem). CRAMFS is useful when space is tight since files are
2329 compressed. Two commands are provided:
2331 cramfsls - lists files in a cramfs image
2332 cramfsload - loads a file from a cramfs image
2335 bool "EROFS command support"
2338 Support for the EROFS fs
2341 bool "ext2 command support"
2344 Enables EXT2 FS command
2347 bool "ext4 command support"
2350 Enables EXT4 FS command
2352 config CMD_EXT4_WRITE
2354 bool "ext4 write command support"
2357 Enables EXT4 FS write command
2360 bool "FAT command support"
2363 Support for the FAT fs
2366 bool "SquashFS command support"
2369 Enables SquashFS filesystem commands (e.g. load, ls).
2371 config CMD_FS_GENERIC
2372 bool "filesystem commands"
2374 Enables filesystem commands (e.g. load, ls) that work for multiple
2378 bool "fsuuid command"
2380 Enables fsuuid command for filesystem UUID.
2383 bool "jffs2 command"
2386 Enables commands to support the JFFS2 (Journalling Flash File System
2387 version 2) filesystem. This enables fsload, ls and fsinfo which
2388 provide the ability to load files, list directories and obtain
2389 filesystem information.
2392 string "Default device for JFFS2"
2393 depends on CMD_JFFS2
2396 The default device to use with the jffs2 command.
2398 config JFFS2_PART_OFFSET
2399 hex "Default offset within flash to locate the JFFS2 image"
2400 depends on CMD_JFFS2
2403 The default offset within flash to locate the JFFS2 image.
2405 config JFFS2_PART_SIZE
2406 hex "Default size of JFFS2 partition"
2407 depends on CMD_JFFS2
2410 The default size of the JFFS2 partition
2413 bool "MTD partition support"
2416 MTD partitioning tool support.
2417 It is strongly encouraged to avoid using this command
2418 anymore along with 'sf', 'nand', 'onenand'. One can still
2419 declare the partitions in the mtdparts environment variable
2420 but better use the MTD stack and the 'mtd' command instead.
2422 config CMD_MTDPARTS_SPREAD
2423 bool "Padd partition size to take account of bad blocks"
2424 depends on CMD_MTDPARTS
2426 This enables the 'spread' sub-command of the mtdparts command.
2427 This command will modify the existing mtdparts variable by increasing
2428 the size of the partitions such that 1) each partition's net size is
2429 at least as large as the size specified in the mtdparts variable and
2430 2) each partition starts on a good block.
2432 config CMD_MTDPARTS_SHOW_NET_SIZES
2433 bool "Show net size (w/o bad blocks) of partitions"
2434 depends on CMD_MTDPARTS
2436 Adds two columns to the printed partition table showing the
2437 effective usable size of a partition, if bad blocks are taken
2440 config MTDIDS_DEFAULT
2441 string "Default MTD IDs"
2442 depends on MTD || SPI_FLASH
2444 Defines a default MTD IDs list for use with MTD partitions in the
2445 Linux MTD command line partitions format.
2447 config MTDPARTS_DEFAULT
2448 string "Default MTD partition scheme"
2449 depends on MTD || SPI_FLASH
2451 Defines a default MTD partitioning scheme in the Linux MTD command
2452 line partitions format
2455 bool "reiser - Access to reiserfs filesystems"
2457 This provides two commands which operate on a resierfs filesystem,
2458 commonly used some years ago:
2460 reiserls - list files
2461 reiserload - load a file
2464 bool "yaffs2 - Access of YAFFS2 filesystem"
2468 This provides commands for accessing a YAFFS2 filesystem. Yet
2469 Another Flash Filesystem 2 is a filesystem designed specifically
2470 for NAND flash. It incorporates bad-block management and ensures
2471 that device writes are sequential regardless of filesystem
2475 bool "zfs - Access of ZFS filesystem"
2477 This provides commands to accessing a ZFS filesystem, commonly used
2478 on Solaris systems. Two sub-commands are provided:
2480 zfsls - list files in a directory
2481 zfsload - load a file
2483 See doc/README.zfs for more details.
2487 menu "Debug commands"
2489 config CMD_CBSYSINFO
2492 default y if SYS_COREBOOT
2494 This provides information about the coreboot sysinfo table stored in
2495 memory by coreboot before jumping to U-Boot. It can be useful for
2496 debugging the beaaviour of coreboot or U-Boot.
2499 bool "diag - Board diagnostics"
2501 This command provides access to board diagnostic tests. These are
2502 called Power-on Self Tests (POST). The command allows listing of
2503 available tests and running either all the tests, or specific tests
2507 bool "event - Show information about events"
2508 default y if EVENT_DEBUG
2510 This enables the 'event' command which provides information about
2511 events and event-handler routines. This can help to device event
2515 bool "irq - Show information about interrupts"
2516 depends on !ARM && !MIPS && !RISCV && !SH
2518 This enables two commands:
2520 interrupts - enable or disable interrupts
2521 irqinfo - print device-specific interrupt information
2524 bool "kgdb - Allow debugging of U-Boot with gdb"
2527 This enables a 'kgdb' command which allows gdb to connect to U-Boot
2528 over a serial link for debugging purposes. This allows
2529 single-stepping, inspecting variables, etc. This is supported only
2530 on PowerPC at present.
2533 bool "log - Generation, control and access to logging"
2537 This provides access to logging features. It allows the output of
2538 log data to be controlled to a limited extent (setting up the default
2539 maximum log level for emitting of records). It also provides access
2540 to a command used for testing the log system.
2543 bool "trace - Support tracing of function calls and timing"
2547 Enables a command to control using of function tracing within
2548 U-Boot. This allows recording of call traces including timing
2549 information. The command can write data to memory for exporting
2550 for analysis (e.g. using bootchart). See doc/README.trace for full
2554 bool "avb - Android Verified Boot 2.0 operations"
2555 depends on AVB_VERIFY
2557 Enables a "avb" command to perform verification of partitions using
2558 Android Verified Boot 2.0 functionality. It includes such subcommands:
2559 avb init - initialize avb2 subsystem
2560 avb read_rb - read rollback index
2561 avb write_rb - write rollback index
2562 avb is_unlocked - check device lock state
2563 avb get_uuid - read and print uuid of a partition
2564 avb read_part - read data from partition
2565 avb read_part_hex - read data from partition and output to stdout
2566 avb write_part - write data to partition
2567 avb verify - run full verification chain
2569 config CMD_STACKPROTECTOR_TEST
2570 bool "Test command for stack protector"
2571 depends on STACKPROTECTOR
2573 Enable stackprot_test command
2574 The stackprot_test command will force a stack overrun to test
2575 the stack smashing detection mechanisms.
2580 tristate "Enable UBI - Unsorted block images commands"
2583 UBI is a software layer above MTD layer which admits use of LVM-like
2584 logical volumes on top of MTD devices, hides some complexities of
2585 flash chips like wear and bad blocks and provides some other useful
2586 capabilities. Please, consult the MTD web site for more details
2587 (www.linux-mtd.infradead.org). Activate this option if you want
2588 to use U-Boot UBI commands.
2589 It is also strongly encouraged to also enable CONFIG_MTD to get full
2592 config CMD_UBI_RENAME
2593 bool "Enable rename"
2596 Enable a "ubi" command to rename ubi volume:
2597 ubi rename <oldname> <newname>
2600 tristate "Enable UBIFS - Unsorted block images filesystem commands"
2602 default y if CMD_UBI
2606 UBIFS is a file system for flash devices which works on top of UBI.
2608 config MMC_SPEED_MODE_SET
2609 bool "set speed mode using mmc command"
2613 Enable setting speed mode using mmc rescan and mmc dev commands.
2614 The speed mode is provided as the last argument in these commands
2615 and is indicated using the index from enum bus_mode in
2616 include/mmc.h. A speed mode can be set only if it has already
2617 been enabled in the device tree.
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