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 (Xilinx only)"
1044 Enables the fpga loads command which is used to load secure
1045 (authenticated or encrypted or both) bitstreams on to FPGA.
1048 bool "fpgad - dump FPGA registers"
1050 (legacy, needs conversion to driver model)
1051 Provides a way to dump FPGA registers by calling the board-specific
1052 fpga_get_reg() function. This functions similarly to the 'md'
1056 bool "fuse - support for the fuse subssystem"
1058 (deprecated - needs conversion to driver model)
1059 This allows reading, sensing, programming or overriding fuses
1060 which control the behaviour of the device. The command uses the
1068 config CMD_GPIO_READ
1069 bool "gpio read - save GPIO value to variable"
1072 Enables the 'gpio read' command that saves the value
1073 of a GPIO pin to a variable.
1079 Control PWM channels, this allows invert/config/enable/disable PWM channels.
1082 bool "GPT (GUID Partition Table) command"
1083 select EFI_PARTITION
1084 select HAVE_BLOCK_DEVICE
1085 select PARTITION_UUIDS
1088 Enable the 'gpt' command to ready and write GPT style partition
1092 bool "GPT Random UUID generation"
1095 Enable the generation of partitions with random UUIDs if none
1098 config CMD_GPT_RENAME
1099 bool "GPT partition renaming commands"
1102 Enables the 'gpt' command to interchange names on two GPT
1103 partitions via the 'gpt swap' command or to rename single
1104 partitions via the 'rename' command.
1107 bool "ide - Support for IDE drivers"
1110 Provides an 'ide' command which allows accessing the IDE drive,
1111 resetting the IDE interface, printing the partition table and
1112 geting device info. It also enables the 'diskboot' command which
1113 permits booting from an IDE drive.
1116 bool "io - Support for performing I/O accesses"
1118 Provides an 'iod' command to display I/O space and an 'iow' command
1119 to write values to the I/O space. This can be useful for manually
1120 checking the state of devices during boot when debugging device
1124 bool "iotrace - Support for tracing I/O activity"
1126 Provides an 'iotrace' command which supports recording I/O reads and
1127 writes in a trace buffer in memory . It also maintains a checksum
1128 of the trace records (even if space is exhausted) so that the
1129 sequence of I/O accesses can be verified.
1131 When debugging drivers it is useful to see what I/O accesses were
1132 done and in what order.
1134 Even if the individual accesses are of little interest it can be
1135 useful to verify that the access pattern is consistent each time
1136 an operation is performed. In this case a checksum can be used to
1137 characterise the operation of a driver. The checksum can be compared
1138 across different runs of the operation to verify that the driver is
1141 In particular, when performing major refactoring of the driver, where
1142 the access pattern should not change, the checksum provides assurance
1143 that the refactoring work has not broken the driver.
1145 This works by sneaking into the io.h heder for an architecture and
1146 redirecting I/O accesses through iotrace's tracing mechanism.
1148 For now no commands are provided to examine the trace buffer. The
1149 format is fairly simple, so 'md' is a reasonable substitute.
1151 Note: The checksum feature is only useful for I/O regions where the
1152 contents do not change outside of software control. Where this is not
1153 suitable you can fall back to manually comparing the addresses. It
1154 might be useful to enhance tracing to only checksum the accesses and
1155 not the data read/written.
1165 bool "w1 - Support for Dallas 1-Wire protocol"
1167 Dallas 1-wire protocol support
1173 Load a binary file over serial line.
1178 Load a binary over memory mapped.
1184 Load an S-Record file over serial line
1188 bool "lsblk - list block drivers and devices"
1190 Print list of available block device drivers, and for each, the list
1191 of known block devices.
1194 bool "MBR (Master Boot Record) command"
1195 select DOS_PARTITION
1196 select HAVE_BLOCK_DEVICE
1198 Enable the 'mbr' command to ready and write MBR (Master Boot Record)
1199 style partition tables.
1205 Enable the command "misc" for accessing miscellaneous devices with
1206 a MISC uclass driver. The command provides listing all MISC devices
1207 as well as read and write functionalities via their drivers.
1213 MMC memory mapped support.
1217 config CMD_BKOPS_ENABLE
1218 bool "mmc bkops enable"
1221 Enable command for setting manual background operations handshake
1222 on a eMMC device. The feature is optionally available on eMMC devices
1223 conforming to standard >= 4.41.
1226 bool "Enable support for RPMB in the mmc command"
1227 depends on SUPPORT_EMMC_RPMB
1229 Enable the commands for reading, writing and programming the
1230 key for the Replay Protection Memory Block partition in eMMC.
1232 config CMD_MMC_SWRITE
1234 depends on MMC_WRITE
1237 Enable support for the "mmc swrite" command to write Android sparse
1246 Enable storage cloning over block devices, useful for
1247 initial flashing by external block device without network
1250 config CMD_OPTEE_RPMB
1251 bool "Enable read/write support on RPMB via OPTEE"
1252 depends on SUPPORT_EMMC_RPMB && OPTEE
1254 Enable the commands for reading, writing persistent named values
1255 in the Replay Protection Memory Block partition in eMMC by
1256 using Persistent Objects in OPTEE
1261 select MTD_PARTITIONS
1263 MTD commands support.
1267 depends on MULTIPLEXER
1269 List, select, and deselect mux controllers on the fly.
1273 default y if NAND_SUNXI
1274 depends on MTD_RAW_NAND
1279 config CMD_NAND_TRIMFFS
1280 bool "nand write.trimffs"
1281 default y if ARCH_SUNXI
1283 Allows one to skip empty pages when flashing something on a NAND.
1285 config CMD_NAND_LOCK_UNLOCK
1286 bool "nand lock/unlock"
1288 NAND locking support.
1290 config CMD_NAND_TORTURE
1293 NAND torture support.
1302 NVM Express device support
1305 bool "onenand - access to onenand device"
1308 OneNAND is a brand of NAND ('Not AND' gate) flash which provides
1309 various useful features. This command allows reading, writing,
1310 and erasing blocks. It allso provides a way to show and change
1311 bad blocks, and test the device.
1313 config USE_ONENAND_BOARD_INIT
1314 bool "Call onenand_board_init() in the onenand command"
1315 depends on CMD_ONENAND
1320 Enable the 'osd' command which allows to query information from and
1321 write text data to a on-screen display (OSD) device; a virtual device
1322 associated with a display capable of displaying a text overlay on the
1323 display it's associated with..
1327 depends on PARTITIONS
1328 select HAVE_BLOCK_DEVICE
1329 select PARTITION_UUIDS
1331 Read and display information about the partition table on
1335 bool "pci - Access PCI devices"
1337 Provide access to PCI (Peripheral Interconnect Bus), a type of bus
1338 used on some devices to allow the CPU to communicate with its
1339 peripherals. Sub-commands allow bus enumeration, displaying and
1340 changing configuration space and a few other features.
1343 bool "pinmux - show pins muxing"
1345 default y if PINCTRL
1347 Parse all available pin-controllers and show pins muxing. This
1348 is useful for debug purpoer to check the pin muxing and to know if
1349 a pin is configured as a GPIO or as an alternate function.
1354 Poweroff/Shutdown the system
1357 bool "read - Read binary data from a partition"
1359 Provides low-level access to the data in a partition.
1361 config CMD_REMOTEPROC
1363 depends on REMOTEPROC
1365 Support for Remote Processor control
1368 bool "sata - Access SATA subsystem"
1371 SATA (Serial Advanced Technology Attachment) is a serial bus
1372 standard for connecting to hard drives and other storage devices.
1373 This command provides information about attached devices and allows
1374 reading, writing and other operations.
1376 SATA replaces PATA (originally just ATA), which stands for Parallel AT
1377 Attachment, where AT refers to an IBM AT (Advanced Technology)
1378 computer released in 1984.
1381 bool "saves - Save a file over serial in S-Record format"
1383 Provides a way to save a binary file using the Motorola S-Record
1384 format over the serial line.
1387 bool "scsi - Access to SCSI devices"
1390 This provides a 'scsi' command which provides access to SCSI (Small
1391 Computer System Interface) devices. The command provides a way to
1392 scan the bus, reset the bus, read and write data and get information
1396 bool "sdram - Print SDRAM configuration information"
1398 Provides information about attached SDRAM. This assumed that the
1399 SDRAM has an EEPROM with information that can be read using the
1400 I2C bus. This is only available on some boards.
1404 depends on DM_SPI_FLASH || SPI_FLASH
1405 default y if DM_SPI_FLASH
1410 bool "sf test - Allow testing of SPI flash"
1413 Provides a way to test that SPI flash is working correctly. The
1414 test is destructive, in that an area of SPI flash must be provided
1415 for the test to use. Performance information is also provided,
1416 measuring the performance of reading, writing and erasing in
1417 Mbps (Million Bits Per Second). This value should approximately
1418 equal the SPI bus speed for a single-bit-wide SPI bus, assuming
1419 everything is working properly.
1422 bool "sspi - Command to access spi device"
1425 SPI utility command.
1427 config DEFAULT_SPI_BUS
1428 int "default spi bus used by sspi command"
1432 config DEFAULT_SPI_MODE
1433 hex "default spi mode used by sspi command (see include/spi.h)"
1438 bool "tsi148 - Command to access tsi148 device"
1440 This provides various sub-commands to initialise and configure the
1441 Turndra tsi148 device. See the command help for full details.
1444 bool "Enable UFS - Universal Flash Subsystem commands"
1447 "This provides commands to initialise and configure universal flash
1451 bool "universe - Command to set up the Turndra Universe controller"
1453 This allows setting up the VMEbus provided by this controller.
1454 See the command help for full details.
1459 select HAVE_BLOCK_DEVICE
1465 select USB_FUNCTION_SDP
1467 Enables the command "sdp" which is used to have U-Boot emulating the
1468 Serial Download Protocol (SDP) via USB.
1472 depends on USB_FUNCTION_ROCKUSB
1474 Rockusb protocol is widely used by Rockchip SoC based devices. It can
1475 read/write info, image to/from devices. This enable rockusb command
1476 support to communication with rockusb device. for more detail about
1477 this command, please read doc/README.rockusb.
1479 config CMD_USB_MASS_STORAGE
1480 bool "UMS usb mass storage"
1481 depends on USB_GADGET_DOWNLOAD
1482 select USB_FUNCTION_MASS_STORAGE
1483 depends on BLK && USB_GADGET
1485 Enables the command "ums" and the USB mass storage support to the
1486 export a block device: U-Boot, the USB device, acts as a simple
1487 external hard drive plugged on the host USB port.
1490 bool "Xen para-virtualized block device"
1494 Xen para-virtualized block device support
1499 depends on HAVE_BLOCK_DEVICE
1502 VirtIO block device support
1508 This provides commands to control the watchdog timer devices.
1514 Enable the command "axi" for accessing AXI (Advanced eXtensible
1515 Interface) busses, a on-chip interconnect specification for managing
1516 functional blocks in SoC designs, which is also often used in designs
1517 involving FPGAs (e.g. communication with IP cores in Xilinx FPGAs).
1521 menu "Shell scripting commands"
1527 Echo args to console
1533 Return true/false on integer compare.
1539 Run script from memory
1545 Evaluate boolean and math expressions and store the result in an env
1547 Also supports loading the value at a memory location into a variable.
1548 If CONFIG_REGEX is enabled, setexpr also supports a gsub function.
1550 config CMD_SETEXPR_FMT
1552 depends on CMD_SETEXPR
1554 Evaluate format string expression and store result in an environment
1559 menu "Android support commands"
1561 config CMD_AB_SELECT
1563 depends on ANDROID_AB
1565 On Android devices with more than one boot slot (multiple copies of
1566 the kernel and system images) this provides a command to select which
1567 slot should be used to boot from and register the boot attempt. This
1568 is used by the new A/B update model where one slot is updated in the
1569 background while running from the other slot.
1576 bool "Network commands"
1586 bootp - boot image via network using BOOTP/TFTP protocol
1590 depends on CMD_BOOTP
1592 Boot image via network using DHCP/TFTP protocol
1594 config BOOTP_MAY_FAIL
1595 bool "Allow for the BOOTP/DHCP server to not be found"
1596 depends on CMD_BOOTP
1598 If the DHCP server is not found after the configured retry count, the
1599 call will fail instead of starting over. This can be used to fail
1600 over to Link-local IP address configuration if the DHCP server is not
1603 config BOOTP_BOOTPATH
1604 bool "Request & store 'rootpath' from BOOTP/DHCP server"
1606 depends on CMD_BOOTP
1608 Even though the config is called BOOTP_BOOTPATH, it stores the
1609 path in the variable 'rootpath'.
1611 config BOOTP_VENDOREX
1612 bool "Support vendor extensions from BOOTP/DHCP server"
1613 depends on CMD_BOOTP
1615 config BOOTP_BOOTFILESIZE
1616 bool "Request & store 'bootfilesize' from BOOTP/DHCP server"
1617 depends on CMD_BOOTP
1620 bool "Request & store 'dnsip' from BOOTP/DHCP server"
1622 depends on CMD_BOOTP
1624 The primary DNS server is stored as 'dnsip'. If two servers are
1625 returned, you must set BOOTP_DNS2 to store that second server IP
1629 bool "Store 'dnsip2' from BOOTP/DHCP server"
1630 depends on BOOTP_DNS
1632 If a DHCP client requests the DNS server IP from a DHCP server,
1633 it is possible that more than one DNS serverip is offered to the
1634 client. If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS
1635 server IP will be stored in the additional environment
1636 variable "dnsip2". The first DNS serverip is always
1637 stored in the variable "dnsip", when BOOTP_DNS is defined.
1639 config BOOTP_GATEWAY
1640 bool "Request & store 'gatewayip' from BOOTP/DHCP server"
1642 depends on CMD_BOOTP
1644 config BOOTP_HOSTNAME
1645 bool "Request & store 'hostname' from BOOTP/DHCP server"
1647 depends on CMD_BOOTP
1649 The name may or may not be qualified with the local domain name.
1651 config BOOTP_PREFER_SERVERIP
1652 bool "serverip variable takes precedent over DHCP server IP."
1653 depends on CMD_BOOTP
1655 By default a BOOTP/DHCP reply will overwrite the 'serverip' variable.
1657 With this option enabled, the 'serverip' variable in the environment
1658 takes precedence over DHCP server IP and will only be set by the DHCP
1659 server if not already set in the environment.
1661 config BOOTP_SUBNETMASK
1662 bool "Request & store 'netmask' from BOOTP/DHCP server"
1664 depends on CMD_BOOTP
1666 config BOOTP_NISDOMAIN
1667 bool "Request & store 'nisdomain' from BOOTP/DHCP server"
1668 depends on CMD_BOOTP
1670 config BOOTP_NTPSERVER
1671 bool "Request & store 'ntpserverip' from BOOTP/DHCP server"
1672 depends on CMD_BOOTP
1674 config BOOTP_TIMEOFFSET
1675 bool "Request & store 'timeoffset' from BOOTP/DHCP server"
1676 depends on CMD_BOOTP && CMD_SNTP
1681 Selecting this will allow capturing all Ethernet packets and store
1682 them in physical memory in a PCAP formated file,
1683 later to be analyzed by PCAP reader application (IE. WireShark).
1686 bool "Send PXE client arch to BOOTP/DHCP server"
1688 depends on CMD_BOOTP && CMD_PXE
1690 Supported for ARM, ARM64, and x86 for now.
1692 config BOOTP_PXE_CLIENTARCH
1694 depends on BOOTP_PXE
1695 default 0x16 if ARM64
1699 config BOOTP_VCI_STRING
1701 depends on CMD_BOOTP
1702 default "U-Boot.armv7" if CPU_V7A || CPU_V7M || CPU_V7R
1703 default "U-Boot.armv8" if ARM64
1704 default "U-Boot.arm" if ARM
1711 tftpboot - boot image via network using TFTP protocol
1715 depends on CMD_TFTPBOOT
1717 TFTP put command, for uploading files to a server
1721 depends on CMD_TFTPBOOT
1723 Act as a TFTP server and boot the first received file
1725 config NET_TFTP_VARS
1726 bool "Control TFTP timeout and count through environment"
1727 depends on CMD_TFTPBOOT
1730 If set, allows controlling the TFTP timeout through the
1731 environment variable tftptimeout, and the TFTP maximum
1732 timeout count through the variable tftptimeoutcountmax.
1733 If unset, timeout and maximum are hard-defined as 1 second
1734 and 10 timouts per TFTP transfer.
1739 Boot image via network using RARP/TFTP protocol
1745 Boot image via network using NFS protocol.
1748 int "Timeout in milliseconds for NFS mounts"
1752 Timeout in milliseconds used in NFS protocol. If you encounter
1753 "ERROR: Cannot umount" in nfs command, try longer timeout such as
1756 config SYS_DISABLE_AUTOLOAD
1757 bool "Disable automatically loading files over the network"
1758 depends on CMD_BOOTP || CMD_DHCP || CMD_NFS || CMD_RARP
1760 Typically, commands such as "dhcp" will attempt to automatically
1761 load a file from the network, once the initial network configuration
1762 is complete. Enable this option to disable this behavior and instead
1763 require files to be loaded over the network by subsequent commands.
1769 If set, allows 802.3(clause 22) MII Management functions interface access
1770 The management interface specified in Clause 22 provides
1771 a simple, two signal, serial interface to connect a
1772 Station Management entity and a managed PHY for providing access
1773 to management parameters and services.
1774 The interface is referred to as the MII management interface.
1777 bool "Call mii_init() in the mii command"
1778 depends on CMD_MII && (MPC8XX_FEC || FSLDMAFE || MCFFEC)
1784 If set, allows Enable 802.3(clause 45) MDIO interface registers access
1785 The MDIO interface is orthogonal to the MII interface and extends
1786 it by adding access to more registers through indirect addressing.
1791 Send ICMP ECHO_REQUEST to network host
1796 Perform CDP network configuration
1802 Synchronize RTC via network
1807 Lookup the IP of a hostname
1809 config CMD_LINK_LOCAL
1813 Acquire a network IP address using the link-local protocol
1820 Allow control of L2 Ethernet switch commands. These are supported
1821 by the vsc9953 Ethernet driver at present. Sub-commands allow
1822 operations such as enabling / disabling a port and
1823 viewing/maintaining the filtering database (FDB)
1829 Boot image via network using PXE protocol
1834 Wait for wake-on-lan Magic Packet
1838 menu "Misc commands"
1841 bool "Enable 'bmp' command"
1842 depends on LCD || DM_VIDEO || VIDEO
1844 This provides a way to obtain information about a BMP-format image
1845 and to display it. BMP (which presumably stands for BitMaP) is a
1846 file format defined by Microsoft which supports images of various
1847 depths, formats and compression methods. Headers on the file
1848 determine the formats used. This command can be used by first loading
1849 the image into RAM, then using this command to look at it or display
1852 config CMD_BOOTCOUNT
1854 depends on BOOTCOUNT_LIMIT
1856 Enable the bootcount command, which allows interrogation and
1857 reset of the bootcounter.
1860 bool "Enable board-specific commands"
1862 (deprecated: instead, please define a Kconfig option for each command)
1864 Some boards have board-specific commands which are only enabled
1865 during developemnt and need to be turned off for production. This
1866 option provides a way to control this. The commands that are enabled
1867 vary depending on the board.
1869 config CMD_BLOCK_CACHE
1870 bool "blkcache - control and stats for block cache"
1871 depends on BLOCK_CACHE
1872 default y if BLOCK_CACHE
1874 Enable the blkcache command, which can be used to control the
1875 operation of the cache functions.
1876 This is most useful when fine-tuning the operation of the cache
1877 during development, but also allows the cache to be disabled when
1878 it might hurt performance (e.g. when using the ums command).
1885 Enable the 'button' command which allows to get the status of
1886 buttons supported by the board. The buttonss can be listed with
1887 'button list' and state can be known with 'button <label>'.
1888 Any button drivers can be controlled with this command, e.g.
1892 bool "icache or dcache"
1894 Enable the "icache" and "dcache" commands
1896 config CMD_CONITRACE
1897 bool "conitrace - trace console input codes"
1899 Enable the 'conitrace' command which displays the codes received
1900 from the console input as hexadecimal numbers.
1903 bool "Enable clear screen command 'cls'"
1904 depends on DM_VIDEO || LCD || VIDEO
1907 Enable the 'cls' command which clears the screen contents
1908 on video frame buffer.
1911 bool "efidebug - display/configure UEFI environment"
1912 depends on EFI_LOADER
1913 select EFI_DEVICE_PATH_TO_TEXT
1915 Enable the 'efidebug' command which provides a subset of UEFI
1916 shell utility with simplified functionality. It will be useful
1917 particularly for managing boot parameters as well as examining
1918 various EFI status for debugging.
1920 config CMD_EXCEPTION
1921 bool "exception - raise exception"
1922 depends on ARM || RISCV || SANDBOX || X86
1924 Enable the 'exception' command which allows to raise an exception.
1931 Enable the 'led' command which allows for control of LEDs supported
1932 by the board. The LEDs can be listed with 'led list' and controlled
1933 with led on/off/togle/blink. Any LED drivers can be controlled with
1934 this command, e.g. led_gpio.
1941 Enable the 'date' command for getting/setting the time/date in RTC
1948 Enable the 'rtc' command for low-level access to RTC devices.
1953 Run commands and summarize execution time.
1956 bool "gettime - read elapsed time"
1958 Enable the 'gettime' command which reads the elapsed time since
1959 U-Boot started running. This shows the time in seconds and
1960 milliseconds. See also the 'bootstage' command which provides more
1961 flexibility for boot timing.
1968 Print bytes from the hardware random number generator.
1970 config CMD_KASLRSEED
1974 Set the kaslr-seed in the chosen node with entropy provided by a
1975 hardware random number generator.
1981 Delay execution for some time
1984 bool "support for multiprocessor commands"
1988 This enables commands to bringup different processors
1989 in multiprocessor cases.
1994 Access the system timer.
2000 This provides basic access to the U-Boot's sound support. The main
2001 feature is to play a beep.
2003 sound init - set up sound system
2004 sound play - play a sound
2010 Boot image via local extlinux.conf file
2016 This provides access to the QEMU firmware interface. The main
2017 feature is to allow easy loading of files passed to qemu-system
2018 via -kernel / -initrd
2023 This provides access to Linux PStore with Rammoops backend. The main
2024 feature is to allow to display or save PStore records.
2026 See doc/pstore.rst for more information.
2030 config CMD_PSTORE_MEM_ADDR
2031 hex "Memory Address"
2032 depends on CMD_PSTORE
2034 Base addr used for PStore ramoops memory, should be identical to
2035 ramoops.mem_address parameter used by kernel
2037 config CMD_PSTORE_MEM_SIZE
2039 depends on CMD_PSTORE
2042 Size of PStore ramoops memory, should be identical to ramoops.mem_size
2043 parameter used by kernel, a power of 2 and larger than the sum of the
2046 config CMD_PSTORE_RECORD_SIZE
2047 hex "Dump record size"
2048 depends on CMD_PSTORE
2051 Size of each dump done on oops/panic, should be identical to
2052 ramoops.record_size parameter used by kernel and a power of 2
2055 config CMD_PSTORE_CONSOLE_SIZE
2056 hex "Kernel console log size"
2057 depends on CMD_PSTORE
2060 Size of kernel console log, should be identical to
2061 ramoops.console_size parameter used by kernel and a power of 2
2064 config CMD_PSTORE_FTRACE_SIZE
2065 hex "FTrace log size"
2066 depends on CMD_PSTORE
2069 Size of ftrace log, should be identical to ramoops.ftrace_size
2070 parameter used by kernel and a power of 2
2072 config CMD_PSTORE_PMSG_SIZE
2073 hex "User space message log size"
2074 depends on CMD_PSTORE
2077 Size of user space message log, should be identical to
2078 ramoops.pmsg_size parameter used by kernel and a power of 2
2080 config CMD_PSTORE_ECC_SIZE
2082 depends on CMD_PSTORE
2085 if non-zero, the option enables ECC support and specifies ECC buffer
2086 size in bytes (1 is a special value, means 16 bytes ECC), should be
2087 identical to ramoops.ramoops_ecc parameter used by kernel
2091 source "cmd/mvebu/Kconfig"
2094 bool "terminal - provides a way to attach a serial terminal"
2096 Provides a 'cu'-like serial terminal command. This can be used to
2097 access other serial ports from the system console. The terminal
2098 is very simple with no special processing of characters. As with
2099 cu, you can press ~. (tilde followed by period) to exit.
2102 bool "uuid, guid - generation of unique IDs"
2105 This enables two commands:
2107 uuid - generate random Universally Unique Identifier
2108 guid - generate Globally Unique Identifier based on random UUID
2110 The two commands are very similar except for the endianness of the
2115 source "cmd/ti/Kconfig"
2117 config CMD_BOOTSTAGE
2118 bool "Enable the 'bootstage' command"
2119 depends on BOOTSTAGE
2121 Add a 'bootstage' command which supports printing a report
2122 and un/stashing of bootstage data.
2124 menu "Power commands"
2126 bool "Enable Driver Model PMIC command"
2129 This is the pmic command, based on a driver model pmic's API.
2130 Command features are unchanged:
2131 - list - list pmic devices
2132 - pmic dev <id> - show or [set] operating pmic device (NEW)
2133 - pmic dump - dump registers
2134 - pmic read address - read byte of register at address
2135 - pmic write address - write byte to register at address
2136 The only one change for this command is 'dev' subcommand.
2138 config CMD_REGULATOR
2139 bool "Enable Driver Model REGULATOR command"
2140 depends on DM_REGULATOR
2142 This command is based on driver model regulator's API.
2143 User interface features:
2144 - list - list regulator devices
2145 - regulator dev <id> - show or [set] operating regulator device
2146 - regulator info - print constraints info
2147 - regulator status - print operating status
2148 - regulator value <val] <-f> - print/[set] voltage value [uV]
2149 - regulator current <val> - print/[set] current value [uA]
2150 - regulator mode <id> - print/[set] operating mode id
2151 - regulator enable - enable the regulator output
2152 - regulator disable - disable the regulator output
2154 The '-f' (force) option can be used for set the value which exceeds
2155 the limits, which are found in device-tree and are kept in regulator's
2156 uclass plat structure.
2160 menu "Security commands"
2162 bool "Enable the 'aes' command"
2165 This provides a means to encrypt and decrypt data using the AES
2166 (Advanced Encryption Standard). This algorithm uses a symetric key
2167 and is widely used as a streaming cipher. Different key lengths are
2168 supported by the algorithm but this command only supports 128 bits
2172 bool "Enable the 'blob' command"
2173 depends on !MX6ULL && !MX6SLL && !MX6SL
2174 select IMX_HAB if ARCH_MX6 || ARCH_MX7 || ARCH_MX7ULP || ARCH_IMX8M
2176 This is used with the Freescale secure boot mechanism.
2178 Freescale's SEC block has built-in Blob Protocol which provides
2179 a method for protecting user-defined data across system power
2180 cycles. SEC block protects data in a data structure called a Blob,
2181 which provides both confidentiality and integrity protection.
2183 Encapsulating data as a blob
2184 Each time that the Blob Protocol is used to protect data, a
2185 different randomly generated key is used to encrypt the data.
2186 This random key is itself encrypted using a key which is derived
2187 from SoC's non-volatile secret key and a 16 bit Key identifier.
2188 The resulting encrypted key along with encrypted data is called a
2189 blob. The non-volatile secure key is available for use only during
2192 During decapsulation, the reverse process is performed to get back
2196 blob enc - encapsulating data as a cryptgraphic blob
2197 blob dec - decapsulating cryptgraphic blob to get the data
2201 blob enc src dst len km
2203 Encapsulate and create blob of data $len bytes long
2204 at address $src and store the result at address $dst.
2205 $km is the 16 byte key modifier is also required for
2206 generation/use as key for cryptographic operation. Key
2207 modifier should be 16 byte long.
2209 blob dec src dst len km
2211 Decapsulate the blob of data at address $src and
2212 store result of $len byte at addr $dst.
2213 $km is the 16 byte key modifier is also required for
2214 generation/use as key for cryptographic operation. Key
2215 modifier should be 16 byte long.
2218 bool "Support 'hash' command"
2221 This provides a way to hash data in memory using various supported
2222 algorithms (such as SHA1, MD5, CRC32). The computed digest can be
2223 saved to memory or to an environment variable. It is also possible
2224 to verify a hash against data in memory.
2227 bool "Support the 'hvc' command"
2228 depends on ARM_SMCCC
2230 Allows issuing Hypervisor Calls (HVCs). Mostly useful for
2231 development and testing.
2234 bool "Support the 'smc' command"
2235 depends on ARM_SMCCC
2237 Allows issuing Secure Monitor Calls (SMCs). Mostly useful for
2238 development and testing.
2244 Add -v option to verify data against a hash.
2247 bool "scp03 - SCP03 enable and rotate/provision operations"
2250 This command provides access to a Trusted Application
2251 running in a TEE to request Secure Channel Protocol 03
2252 (SCP03) enablement and/or rotation of its SCP03 keys.
2261 bool "Enable the 'tpm' command"
2262 depends on TPM_V1 || TPM_V2
2263 select CMD_TPM_V1 if TPM_V1
2264 select CMD_TPM_V2 if TPM_V2
2266 This provides a means to talk to a TPM from the command line. A wide
2267 range of commands if provided - see 'tpm help' for details. The
2268 command requires a suitable TPM on your board and the correct driver
2274 bool "Enable the 'tpm test' command"
2277 This provides a a series of tests to confirm that the TPMv1.x is
2278 working correctly. The tests cover initialisation, non-volatile RAM,
2279 extend, global lock and checking that timing is within expectations.
2280 The tests pass correctly on Infineon TPMs but may need to be adjusted
2287 menu "Firmware commands"
2289 bool "Enable crosec command"
2293 Enable command-line access to the Chrome OS EC (Embedded
2294 Controller). This provides the 'crosec' command which has
2295 a number of sub-commands for performing EC tasks such as
2296 updating its flash, accessing a small saved context area
2297 and talking to the I2C bus behind the EC (if there is one).
2300 menu "Filesystem commands"
2302 bool "Enable the 'btrsubvol' command"
2305 This enables the 'btrsubvol' command to list subvolumes
2306 of a BTRFS filesystem. There are no special commands for
2307 listing BTRFS directories or loading BTRFS files - this
2308 can be done by the generic 'fs' commands (see CMD_FS_GENERIC)
2309 when BTRFS is enabled (see FS_BTRFS).
2312 bool "Enable the 'cbfs' command"
2315 Define this to enable support for reading from a Coreboot
2316 filesystem. This is a ROM-based filesystem used for accessing files
2317 on systems that use coreboot as the first boot-loader and then load
2318 U-Boot to actually boot the Operating System. Available commands are
2319 cbfsinit, cbfsinfo, cbfsls and cbfsload.
2322 bool "Enable the 'cramfs' command"
2323 depends on FS_CRAMFS
2325 This provides commands for dealing with CRAMFS (Compressed ROM
2326 filesystem). CRAMFS is useful when space is tight since files are
2327 compressed. Two commands are provided:
2329 cramfsls - lists files in a cramfs image
2330 cramfsload - loads a file from a cramfs image
2333 bool "EROFS command support"
2336 Support for the EROFS fs
2339 bool "ext2 command support"
2342 Enables EXT2 FS command
2345 bool "ext4 command support"
2348 Enables EXT4 FS command
2350 config CMD_EXT4_WRITE
2352 bool "ext4 write command support"
2355 Enables EXT4 FS write command
2358 bool "FAT command support"
2361 Support for the FAT fs
2364 bool "SquashFS command support"
2367 Enables SquashFS filesystem commands (e.g. load, ls).
2369 config CMD_FS_GENERIC
2370 bool "filesystem commands"
2372 Enables filesystem commands (e.g. load, ls) that work for multiple
2376 bool "fsuuid command"
2378 Enables fsuuid command for filesystem UUID.
2381 bool "jffs2 command"
2384 Enables commands to support the JFFS2 (Journalling Flash File System
2385 version 2) filesystem. This enables fsload, ls and fsinfo which
2386 provide the ability to load files, list directories and obtain
2387 filesystem information.
2390 string "Default device for JFFS2"
2391 depends on CMD_JFFS2
2394 The default device to use with the jffs2 command.
2396 config JFFS2_PART_OFFSET
2397 hex "Default offset within flash to locate the JFFS2 image"
2398 depends on CMD_JFFS2
2401 The default offset within flash to locate the JFFS2 image.
2403 config JFFS2_PART_SIZE
2404 hex "Default size of JFFS2 partition"
2405 depends on CMD_JFFS2
2408 The default size of the JFFS2 partition
2411 bool "MTD partition support"
2414 MTD partitioning tool support.
2415 It is strongly encouraged to avoid using this command
2416 anymore along with 'sf', 'nand', 'onenand'. One can still
2417 declare the partitions in the mtdparts environment variable
2418 but better use the MTD stack and the 'mtd' command instead.
2420 config CMD_MTDPARTS_SPREAD
2421 bool "Padd partition size to take account of bad blocks"
2422 depends on CMD_MTDPARTS
2424 This enables the 'spread' sub-command of the mtdparts command.
2425 This command will modify the existing mtdparts variable by increasing
2426 the size of the partitions such that 1) each partition's net size is
2427 at least as large as the size specified in the mtdparts variable and
2428 2) each partition starts on a good block.
2430 config CMD_MTDPARTS_SHOW_NET_SIZES
2431 bool "Show net size (w/o bad blocks) of partitions"
2432 depends on CMD_MTDPARTS
2434 Adds two columns to the printed partition table showing the
2435 effective usable size of a partition, if bad blocks are taken
2438 config MTDIDS_DEFAULT
2439 string "Default MTD IDs"
2440 depends on MTD || SPI_FLASH
2442 Defines a default MTD IDs list for use with MTD partitions in the
2443 Linux MTD command line partitions format.
2445 config MTDPARTS_DEFAULT
2446 string "Default MTD partition scheme"
2447 depends on MTD || SPI_FLASH
2449 Defines a default MTD partitioning scheme in the Linux MTD command
2450 line partitions format
2453 bool "reiser - Access to reiserfs filesystems"
2455 This provides two commands which operate on a resierfs filesystem,
2456 commonly used some years ago:
2458 reiserls - list files
2459 reiserload - load a file
2462 bool "yaffs2 - Access of YAFFS2 filesystem"
2466 This provides commands for accessing a YAFFS2 filesystem. Yet
2467 Another Flash Filesystem 2 is a filesystem designed specifically
2468 for NAND flash. It incorporates bad-block management and ensures
2469 that device writes are sequential regardless of filesystem
2473 bool "zfs - Access of ZFS filesystem"
2475 This provides commands to accessing a ZFS filesystem, commonly used
2476 on Solaris systems. Two sub-commands are provided:
2478 zfsls - list files in a directory
2479 zfsload - load a file
2481 See doc/README.zfs for more details.
2485 menu "Debug commands"
2487 config CMD_CBSYSINFO
2490 default y if SYS_COREBOOT
2492 This provides information about the coreboot sysinfo table stored in
2493 memory by coreboot before jumping to U-Boot. It can be useful for
2494 debugging the beaaviour of coreboot or U-Boot.
2497 bool "diag - Board diagnostics"
2499 This command provides access to board diagnostic tests. These are
2500 called Power-on Self Tests (POST). The command allows listing of
2501 available tests and running either all the tests, or specific tests
2505 bool "event - Show information about events"
2506 default y if EVENT_DEBUG
2508 This enables the 'event' command which provides information about
2509 events and event-handler routines. This can help to device event
2513 bool "irq - Show information about interrupts"
2514 depends on !ARM && !MIPS && !RISCV && !SH
2516 This enables two commands:
2518 interrupts - enable or disable interrupts
2519 irqinfo - print device-specific interrupt information
2522 bool "kgdb - Allow debugging of U-Boot with gdb"
2525 This enables a 'kgdb' command which allows gdb to connect to U-Boot
2526 over a serial link for debugging purposes. This allows
2527 single-stepping, inspecting variables, etc. This is supported only
2528 on PowerPC at present.
2531 bool "log - Generation, control and access to logging"
2535 This provides access to logging features. It allows the output of
2536 log data to be controlled to a limited extent (setting up the default
2537 maximum log level for emitting of records). It also provides access
2538 to a command used for testing the log system.
2541 bool "trace - Support tracing of function calls and timing"
2545 Enables a command to control using of function tracing within
2546 U-Boot. This allows recording of call traces including timing
2547 information. The command can write data to memory for exporting
2548 for analysis (e.g. using bootchart). See doc/README.trace for full
2552 bool "avb - Android Verified Boot 2.0 operations"
2553 depends on AVB_VERIFY
2555 Enables a "avb" command to perform verification of partitions using
2556 Android Verified Boot 2.0 functionality. It includes such subcommands:
2557 avb init - initialize avb2 subsystem
2558 avb read_rb - read rollback index
2559 avb write_rb - write rollback index
2560 avb is_unlocked - check device lock state
2561 avb get_uuid - read and print uuid of a partition
2562 avb read_part - read data from partition
2563 avb read_part_hex - read data from partition and output to stdout
2564 avb write_part - write data to partition
2565 avb verify - run full verification chain
2567 config CMD_STACKPROTECTOR_TEST
2568 bool "Test command for stack protector"
2569 depends on STACKPROTECTOR
2571 Enable stackprot_test command
2572 The stackprot_test command will force a stack overrun to test
2573 the stack smashing detection mechanisms.
2578 tristate "Enable UBI - Unsorted block images commands"
2581 UBI is a software layer above MTD layer which admits use of LVM-like
2582 logical volumes on top of MTD devices, hides some complexities of
2583 flash chips like wear and bad blocks and provides some other useful
2584 capabilities. Please, consult the MTD web site for more details
2585 (www.linux-mtd.infradead.org). Activate this option if you want
2586 to use U-Boot UBI commands.
2587 It is also strongly encouraged to also enable CONFIG_MTD to get full
2590 config CMD_UBI_RENAME
2591 bool "Enable rename"
2594 Enable a "ubi" command to rename ubi volume:
2595 ubi rename <oldname> <newname>
2598 tristate "Enable UBIFS - Unsorted block images filesystem commands"
2600 default y if CMD_UBI
2604 UBIFS is a file system for flash devices which works on top of UBI.
2606 config MMC_SPEED_MODE_SET
2607 bool "set speed mode using mmc command"
2611 Enable setting speed mode using mmc rescan and mmc dev commands.
2612 The speed mode is provided as the last argument in these commands
2613 and is indicated using the index from enum bus_mode in
2614 include/mmc.h. A speed mode can be set only if it has already
2615 been enabled in the device tree.
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