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 "vbe - Verified Boot for Embedded"
335 depends on BOOTMETH_VBE
338 Provides various subcommands related to VBE, such as listing the
339 available methods, looking at the state and changing which method
340 is used to boot. Updating the parameters is not currently
344 bool "Support booting VxWorks OS images"
348 Support booting VxWorks images via the bootm command.
351 hex "Maximum size of a decompresed OS image"
352 depends on CMD_BOOTM || CMD_BOOTI || CMD_BOOTZ
353 default 0x4000000 if PPC || ARM64
354 default 0x1000000 if X86 || ARCH_MX6 || ARCH_MX7
357 This is the maximum size of the buffer that is used to decompress the OS
358 image in to, if passing a compressed image to bootm/booti/bootz.
362 depends on EFI_LOADER
365 Boot an EFI image from memory.
367 config CMD_BOOTEFI_HELLO_COMPILE
368 bool "Compile a standard EFI hello world binary for testing"
369 depends on CMD_BOOTEFI && !CPU_V7M
372 This compiles a standard EFI hello world application with U-Boot so
373 that it can be used with the test/py testing framework. This is useful
374 for testing that EFI is working at a basic level, and for bringing
375 up EFI support on a new architecture.
377 No additional space will be required in the resulting U-Boot binary
378 when this option is enabled.
380 config CMD_BOOTEFI_HELLO
381 bool "Allow booting a standard EFI hello world for testing"
382 depends on CMD_BOOTEFI_HELLO_COMPILE
383 default y if CMD_BOOTEFI_SELFTEST
385 This adds a standard EFI hello world application to U-Boot so that
386 it can be used with the 'bootefi hello' command. This is useful
387 for testing that EFI is working at a basic level, and for bringing
388 up EFI support on a new architecture.
390 source lib/efi_selftest/Kconfig
397 Add an ANSI terminal boot menu command.
402 Android DTB/DTBO image manipulation commands. Read dtb/dtbo files from
403 image into RAM, dump image structure information, etc. Those dtb/dtbo
404 files should be merged in one dtb further, which needs to be passed to
405 the kernel, as part of a boot process.
409 depends on ANDROID_BOOT_IMAGE
411 Android Boot Image manipulation commands. Allows one to extract
412 images contained in boot.img, like kernel, ramdisk, dtb, etc, and
413 obtain corresponding meta-information from boot.img.
415 See doc/android/boot-image.rst for details.
418 bool "bootelf, bootvx"
422 Boot an ELF/vxWorks image from the memory.
425 bool "Flattened Device Tree utility commands"
429 Do FDT related setup before booting into the Operating System.
431 config SUPPORT_EXTENSION_SCAN
435 bool "Extension board management command"
437 depends on SUPPORT_EXTENSION_SCAN
439 Enables the "extension" command, which allows to detect
440 extension boards connected to the system, and apply
441 corresponding Device Tree overlays.
447 Start an application at a given address.
453 Run the command in the given environment variable.
459 Print header information for application image.
464 List all images found in flash
470 Extract a part of a multi-image.
473 bool "spl export - Export boot information for Falcon boot"
476 Falcon mode allows booting directly from SPL into an Operating
477 System such as Linux, thus skipping U-Boot proper. See
478 doc/README.falcon for full information about how to use this
481 config CMD_SPL_NAND_OFS
482 hex "Offset of OS args or dtb for Falcon-mode NAND boot"
483 depends on CMD_SPL && (TPL_NAND_SUPPORT || SPL_NAND_SUPPORT)
486 This provides the offset of the command line arguments for Linux
487 when booting from NAND in Falcon mode. See doc/README.falcon
488 for full information about how to use this option (and also see
489 board/gateworks/gw_ventana/README for an example).
491 config CMD_SPL_NOR_OFS
492 hex "Offset of OS args or dtb for Falcon-mode NOR boot"
493 depends on CMD_SPL && SPL_NOR_SUPPORT
496 This provides the offset of the command line arguments or dtb for
497 Linux when booting from NOR in Falcon mode.
499 config CMD_SPL_WRITE_SIZE
500 hex "Size of argument area"
504 This provides the size of the command-line argument area in NAND
505 flash used by Falcon-mode boot. See the documentation until CMD_SPL
508 config CMD_THOR_DOWNLOAD
509 bool "thor - TIZEN 'thor' download"
512 Implements the 'thor' download protocol. This is a way of
513 downloading a software update over USB from an attached host.
514 There is no documentation about this within the U-Boot source code
515 but you should be able to find something on the interwebs.
518 bool "zboot - x86 boot command"
520 With x86 machines it is common to boot a bzImage file which
521 contains both a kernel and a setup.bin file. The latter includes
522 configuration information from the dark ages which x86 boards still
523 need to pick things out of.
525 Consider using FIT in preference to this since it supports directly
526 booting both 32- and 64-bit kernels, as well as secure boot.
527 Documentation is available in doc/uImage.FIT/x86-fit-boot.txt
531 menu "Environment commands"
534 bool "ask for env variable"
536 Ask for environment variable
554 Edit environment variable.
559 Allow for searching environment variables
565 Save all environment variables into the compiled-in persistent
570 depends on CMD_SAVEENV
572 Erase environment variables from the compiled-in persistent
575 config CMD_ENV_EXISTS
579 Check if a variable is defined in the environment for use in
582 config CMD_ENV_CALLBACK
583 bool "env callbacks - print callbacks and their associated variables"
585 Some environment variable have callbacks defined by
586 U_BOOT_ENV_CALLBACK. These are called when the variable changes.
587 For example changing "baudrate" adjust the serial baud rate. This
588 command lists the currently defined callbacks.
591 bool "env flags -print variables that have non-default flags"
593 Some environment variables have special flags that control their
594 behaviour. For example, serial# can only be written once and cannot
595 be deleted. This command shows the variables that have special
598 config CMD_NVEDIT_EFI
599 bool "env [set|print] -e - set/print UEFI variables"
600 depends on EFI_LOADER
603 UEFI variables are encoded as some form of U-Boot variables.
604 If enabled, we are allowed to set/print UEFI variables using
605 "env" command with "-e" option without knowing details.
607 config CMD_NVEDIT_INDIRECT
608 bool "env indirect - Sets environment value from another"
610 config CMD_NVEDIT_INFO
611 bool "env info - print or evaluate environment information"
613 Print environment information:
614 - env_valid : is environment valid
615 - env_ready : is environment imported into hash table
616 - env_use_default : is default environment used
618 This command can be optionally used for evaluation in scripts:
619 [-d] : evaluate whether default environment is used
620 [-p] : evaluate whether environment can be persisted
622 The result of multiple evaluations will be combined with AND.
624 config CMD_NVEDIT_LOAD
627 Load all environment variables from the compiled-in persistent
630 config CMD_NVEDIT_SELECT
633 Select the compiled-in persistent storage of environment variables.
637 menu "Memory commands"
642 Compute binary operations (xor, or, and) of byte arrays of arbitrary
643 size from memory and store the result in memory or the environment.
647 default y if BLOBLIST
649 Show information about the bloblist, a collection of binary blobs
650 held in memory that persist between SPL and U-Boot. In the case of
651 x86 devices the bloblist can be used to hold ACPI tables so that they
652 remain available in memory.
665 Add -v option to verify data against a crc32 checksum.
668 bool "eeprom - EEPROM subsystem"
670 (deprecated, needs conversion to driver model)
671 Provides commands to read and write EEPROM (Electrically Erasable
672 Programmable Read Only Memory) chips that are connected over an
675 config CMD_EEPROM_LAYOUT
676 bool "Enable layout-aware eeprom commands"
677 depends on CMD_EEPROM
679 (deprecated, needs conversion to driver model)
680 When enabled, additional eeprom sub-commands become available.
682 eeprom print - prints the contents of the eeprom in a human-readable
683 way (eeprom layout fields, and data formatted to be fit for human
686 eeprom update - allows user to update eeprom fields by specifying
687 the field name, and providing the new data in a human readable format
688 (same format as displayed by the eeprom print command).
690 Both commands can either auto detect the layout, or be told which
694 __weak int parse_layout_version(char *str)
695 - override to provide your own layout name parsing
696 __weak void __eeprom_layout_assign(struct eeprom_layout *layout,
698 - override to setup the layout metadata based on the version
699 __weak int eeprom_layout_detect(unsigned char *data)
700 - override to provide your own algorithm for detecting layout
703 - contains various printing and updating functions for common
704 types of eeprom fields. Can be used for defining
707 config EEPROM_LAYOUT_HELP_STRING
708 string "Tells user what layout names are supported"
709 depends on CMD_EEPROM_LAYOUT
710 default "<not defined>"
712 Help printed with the LAYOUT VERSIONS part of the 'eeprom'
715 config SYS_I2C_EEPROM_BUS
716 int "I2C bus of the EEPROM device."
717 depends on CMD_EEPROM
720 config SYS_I2C_EEPROM_ADDR_LEN
721 int "Length in bytes of the EEPROM memory array address"
722 depends on CMD_EEPROM || ID_EEPROM
726 Note: This is NOT the chip address length!
728 config SYS_EEPROM_SIZE
729 depends on CMD_EEPROM
730 int "Size in bytes of the EEPROM device"
733 config SYS_EEPROM_PAGE_WRITE_BITS
734 int "Number of bits used to address bytes in a single page"
735 depends on CMD_EEPROM
738 The EEPROM page size is 2^SYS_EEPROM_PAGE_WRITE_BITS.
739 A 64 byte page, for example would require six bits.
741 config SYS_EEPROM_PAGE_WRITE_DELAY_MS
742 int "Number of milliseconds to delay between page writes"
743 depends on CMD_EEPROM || CMD_I2C
749 Infinite write loop on address range
755 Compute MD5 checksum.
759 depends on CMD_MD5SUM
761 Add -v option to verify data against an MD5 checksum.
766 Display memory information.
769 bool "md, mm, nm, mw, cp, cmp, base, loop"
774 mm - memory modify (auto-incrementing address)
775 nm - memory modify (constant address)
776 mw - memory write (fill)
779 base - print or set address offset
780 loop - initialize loop on address range
782 config CMD_MEM_SEARCH
783 bool "ms - Memory search"
785 Memory-search command
787 This allows searching through a region of memory looking for hex
788 data (byte, 16-bit word, 32-bit long, also 64-bit on machines that
789 support it). It is also possible to search for a string. The
790 command accepts a memory range and a list of values to search for.
791 The values need to appear in memory in the same order they are given
792 in the command. At most 10 matches can be returned at a time, but
793 pressing return will show the next 10 matches. Environment variables
794 are set for use with scripting (memmatches, memaddr, mempos).
797 bool "Enable cyclic md/mw commands"
798 depends on CMD_MEMORY
800 Add the "mdc" and "mwc" memory commands. These are cyclic
805 This command will print 4 bytes (10,11,12,13) each 500 ms.
807 => mwc.l 100 12345678 10
808 This command will write 12345678 to address 100 all 10 ms.
813 depends on CMD_MEMORY && (LIB_RAND || LIB_HW_RAND)
815 random - fill memory with random data
820 Simple RAM read/write test.
824 config SYS_ALT_MEMTEST
825 bool "Alternative test"
827 Use a more complete alternative memory test.
831 config SYS_ALT_MEMTEST_BITFLIP
835 The alternative memory test includes bitflip test since 2020.07.
836 The bitflip test significantly increases the overall test time.
837 Bitflip test can optionally be disabled here.
841 config SYS_MEMTEST_START
842 hex "default start address for mtest"
845 This is the default start address for mtest for simple read/write
846 test. If no arguments are given to mtest, default address is used
849 config SYS_MEMTEST_END
850 hex "default end address for mtest"
853 This is the default end address for mtest for simple read/write
854 test. If no arguments are given to mtest, default address is used
863 Compute SHA1 checksum.
865 config SHA1SUM_VERIFY
867 depends on CMD_SHA1SUM
869 Add -v option to verify data against a SHA1 checksum.
872 bool "strings - display strings in memory"
874 This works similarly to the Unix 'strings' command except that it
875 works with a memory range. String of printable characters found
876 within the range are displayed. The minimum number of characters
877 for a sequence to be considered a string can be provided.
881 menu "Compression commands"
885 default y if CMD_BOOTI
888 Support decompressing an LZMA (Lempel-Ziv-Markov chain algorithm)
893 default y if CMD_BOOTI
896 Support decompressing an LZ4 image from memory region.
900 default y if CMD_BOOTI
903 Uncompress a zip-compressed memory region.
907 select GZIP_COMPRESSED
909 Compress a memory region with zlib deflate method.
913 menu "Device access commands"
916 #depends on FLASH_CFI_DRIVER
919 ARM Ltd reference designs flash partition access
922 bool "adc - Access Analog to Digital Converters info and data"
924 depends on DM_REGULATOR
926 Shows ADC device info and permit printing one-shot analog converted
927 data from a named Analog to Digital Converter.
932 depends on PARTITIONS
934 Read/modify/write the fields of Bootloader Control Block, usually
935 stored on the flash "misc" partition with its structure defined in:
936 https://android.googlesource.com/platform/bootable/recovery/+/master/
937 bootloader_message/include/bootloader_message/bootloader_message.h
939 Some real-life use-cases include (but are not limited to):
940 - Determine the "boot reason" (and act accordingly):
941 https://source.android.com/devices/bootloader/boot-reason
942 - Get/pass a list of commands from/to recovery:
943 https://android.googlesource.com/platform/bootable/recovery
944 - Inspect/dump the contents of the BCB fields
947 bool "bind/unbind - Bind or unbind a device to/from a driver"
950 Bind or unbind a device to/from a driver from the command line.
951 This is useful in situations where a device may be handled by several
952 drivers. For example, this can be used to bind a UDC to the usb ether
953 gadget driver from the command line.
956 bool "clk - Show clock frequencies"
959 Shows clock frequences by calling a sock_clk_dump() hook function.
960 This is depreated in favour of using the CLK uclass and accessing
961 clock values from associated drivers. However currently no command
965 bool "demo - Demonstration commands for driver model"
968 Provides a 'demo' command which can be used to play around with
969 driver model. To use this properly you will need to enable one or
970 both of the demo devices (DM_DEMO_SHAPE and DM_DEMO_SIMPLE).
971 Otherwise you will always get an empty list of devices. The demo
972 devices are defined in the sandbox device tree, so the easiest
973 option is to use sandbox and pass the -d point to sandbox's
980 Enables the command "dfu" which is used to have U-Boot create a DFU
981 class device via USB. This command requires that the "dfu_alt_info"
982 environment variable be set and define the alt settings to expose to
986 bool "dm - Access to driver model information"
989 Provides access to driver model data structures and information,
990 such as a list of devices, list of uclasses and the state of each
991 device (e.g. activated). This is not required for operation, but
992 can be useful to see the state of driver model for debugging or
996 bool "fastboot - Android fastboot support"
999 This enables the command "fastboot" which enables the Android
1000 fastboot mode for the platform. Fastboot is a protocol for
1001 downloading images, flashing and device control used on
1002 Android devices. Fastboot requires either the network stack
1003 enabled or support for acting as a USB device.
1005 See doc/android/fastboot.rst for more information.
1008 bool "flinfo, erase, protect"
1010 depends on MTD || FLASH_CFI_DRIVER || MTD_NOR_FLASH
1013 flinfo - print FLASH memory information
1014 erase - FLASH memory
1015 protect - enable or disable FLASH write protection
1024 config CMD_FPGA_LOADBP
1025 bool "fpga loadbp - load partial bitstream (Xilinx only)"
1028 Supports loading an FPGA device from a bitstream buffer containing
1029 a partial bitstream.
1031 config CMD_FPGA_LOADFS
1032 bool "fpga loadfs - load bitstream from FAT filesystem (Xilinx only)"
1035 Supports loading an FPGA device from a FAT filesystem.
1037 config CMD_FPGA_LOADMK
1038 bool "fpga loadmk - load bitstream from image"
1041 Supports loading an FPGA device from a image generated by mkimage.
1043 config CMD_FPGA_LOADP
1044 bool "fpga loadp - load partial bitstream"
1047 Supports loading an FPGA device from a bitstream buffer containing
1048 a partial bitstream.
1050 config CMD_FPGA_LOAD_SECURE
1051 bool "fpga loads - loads secure bitstreams"
1053 select FPGA_LOAD_SECURE
1055 Enables the fpga loads command which is used to load secure
1056 (authenticated or encrypted or both) bitstreams on to FPGA.
1059 bool "fpgad - dump FPGA registers"
1061 (legacy, needs conversion to driver model)
1062 Provides a way to dump FPGA registers by calling the board-specific
1063 fpga_get_reg() function. This functions similarly to the 'md'
1067 bool "fuse - support for the fuse subssystem"
1069 (deprecated - needs conversion to driver model)
1070 This allows reading, sensing, programming or overriding fuses
1071 which control the behaviour of the device. The command uses the
1079 config CMD_GPIO_READ
1080 bool "gpio read - save GPIO value to variable"
1083 Enables the 'gpio read' command that saves the value
1084 of a GPIO pin to a variable.
1090 Control PWM channels, this allows invert/config/enable/disable PWM channels.
1093 bool "GPT (GUID Partition Table) command"
1094 select EFI_PARTITION
1095 select HAVE_BLOCK_DEVICE
1096 select PARTITION_UUIDS
1099 Enable the 'gpt' command to ready and write GPT style partition
1103 bool "GPT Random UUID generation"
1106 Enable the generation of partitions with random UUIDs if none
1109 config CMD_GPT_RENAME
1110 bool "GPT partition renaming commands"
1113 Enables the 'gpt' command to interchange names on two GPT
1114 partitions via the 'gpt swap' command or to rename single
1115 partitions via the 'rename' command.
1118 bool "ide - Support for IDE drivers"
1121 Provides an 'ide' command which allows accessing the IDE drive,
1122 resetting the IDE interface, printing the partition table and
1123 geting device info. It also enables the 'diskboot' command which
1124 permits booting from an IDE drive.
1127 bool "io - Support for performing I/O accesses"
1129 Provides an 'iod' command to display I/O space and an 'iow' command
1130 to write values to the I/O space. This can be useful for manually
1131 checking the state of devices during boot when debugging device
1135 bool "iotrace - Support for tracing I/O activity"
1137 Provides an 'iotrace' command which supports recording I/O reads and
1138 writes in a trace buffer in memory . It also maintains a checksum
1139 of the trace records (even if space is exhausted) so that the
1140 sequence of I/O accesses can be verified.
1142 When debugging drivers it is useful to see what I/O accesses were
1143 done and in what order.
1145 Even if the individual accesses are of little interest it can be
1146 useful to verify that the access pattern is consistent each time
1147 an operation is performed. In this case a checksum can be used to
1148 characterise the operation of a driver. The checksum can be compared
1149 across different runs of the operation to verify that the driver is
1152 In particular, when performing major refactoring of the driver, where
1153 the access pattern should not change, the checksum provides assurance
1154 that the refactoring work has not broken the driver.
1156 This works by sneaking into the io.h heder for an architecture and
1157 redirecting I/O accesses through iotrace's tracing mechanism.
1159 For now no commands are provided to examine the trace buffer. The
1160 format is fairly simple, so 'md' is a reasonable substitute.
1162 Note: The checksum feature is only useful for I/O regions where the
1163 contents do not change outside of software control. Where this is not
1164 suitable you can fall back to manually comparing the addresses. It
1165 might be useful to enhance tracing to only checksum the accesses and
1166 not the data read/written.
1176 bool "w1 - Support for Dallas 1-Wire protocol"
1178 Dallas 1-wire protocol support
1184 Load a binary file over serial line.
1189 Load a binary over memory mapped.
1195 Load an S-Record file over serial line
1199 bool "lsblk - list block drivers and devices"
1201 Print list of available block device drivers, and for each, the list
1202 of known block devices.
1205 bool "MBR (Master Boot Record) command"
1206 select DOS_PARTITION
1207 select HAVE_BLOCK_DEVICE
1209 Enable the 'mbr' command to ready and write MBR (Master Boot Record)
1210 style partition tables.
1216 Enable the command "misc" for accessing miscellaneous devices with
1217 a MISC uclass driver. The command provides listing all MISC devices
1218 as well as read and write functionalities via their drivers.
1224 MMC memory mapped support.
1228 config CMD_BKOPS_ENABLE
1229 bool "mmc bkops enable"
1232 Enable command for setting manual background operations handshake
1233 on a eMMC device. The feature is optionally available on eMMC devices
1234 conforming to standard >= 4.41.
1237 bool "Enable support for RPMB in the mmc command"
1238 depends on SUPPORT_EMMC_RPMB
1240 Enable the commands for reading, writing and programming the
1241 key for the Replay Protection Memory Block partition in eMMC.
1243 config CMD_MMC_SWRITE
1245 depends on MMC_WRITE
1248 Enable support for the "mmc swrite" command to write Android sparse
1257 Enable storage cloning over block devices, useful for
1258 initial flashing by external block device without network
1261 config CMD_OPTEE_RPMB
1262 bool "Enable read/write support on RPMB via OPTEE"
1263 depends on SUPPORT_EMMC_RPMB && OPTEE
1265 Enable the commands for reading, writing persistent named values
1266 in the Replay Protection Memory Block partition in eMMC by
1267 using Persistent Objects in OPTEE
1272 select MTD_PARTITIONS
1274 MTD commands support.
1278 depends on MULTIPLEXER
1280 List, select, and deselect mux controllers on the fly.
1284 default y if NAND_SUNXI
1285 depends on MTD_RAW_NAND
1290 config CMD_NAND_TRIMFFS
1291 bool "nand write.trimffs"
1292 default y if ARCH_SUNXI
1294 Allows one to skip empty pages when flashing something on a NAND.
1296 config CMD_NAND_LOCK_UNLOCK
1297 bool "nand lock/unlock"
1299 NAND locking support.
1301 config CMD_NAND_TORTURE
1304 NAND torture support.
1313 NVM Express device support
1316 bool "onenand - access to onenand device"
1319 OneNAND is a brand of NAND ('Not AND' gate) flash which provides
1320 various useful features. This command allows reading, writing,
1321 and erasing blocks. It allso provides a way to show and change
1322 bad blocks, and test the device.
1324 config USE_ONENAND_BOARD_INIT
1325 bool "Call onenand_board_init() in the onenand command"
1326 depends on CMD_ONENAND
1331 Enable the 'osd' command which allows to query information from and
1332 write text data to a on-screen display (OSD) device; a virtual device
1333 associated with a display capable of displaying a text overlay on the
1334 display it's associated with..
1338 depends on PARTITIONS
1339 select HAVE_BLOCK_DEVICE
1340 select PARTITION_UUIDS
1342 Read and display information about the partition table on
1346 bool "pci - Access PCI devices"
1348 Provide access to PCI (Peripheral Interconnect Bus), a type of bus
1349 used on some devices to allow the CPU to communicate with its
1350 peripherals. Sub-commands allow bus enumeration, displaying and
1351 changing configuration space and a few other features.
1354 bool "pinmux - show pins muxing"
1356 default y if PINCTRL
1358 Parse all available pin-controllers and show pins muxing. This
1359 is useful for debug purpoer to check the pin muxing and to know if
1360 a pin is configured as a GPIO or as an alternate function.
1365 Poweroff/Shutdown the system
1368 bool "read - Read binary data from a partition"
1370 Provides low-level access to the data in a partition.
1372 config CMD_REMOTEPROC
1374 depends on REMOTEPROC
1376 Support for Remote Processor control
1379 bool "sata - Access SATA subsystem"
1382 SATA (Serial Advanced Technology Attachment) is a serial bus
1383 standard for connecting to hard drives and other storage devices.
1384 This command provides information about attached devices and allows
1385 reading, writing and other operations.
1387 SATA replaces PATA (originally just ATA), which stands for Parallel AT
1388 Attachment, where AT refers to an IBM AT (Advanced Technology)
1389 computer released in 1984.
1392 bool "saves - Save a file over serial in S-Record format"
1394 Provides a way to save a binary file using the Motorola S-Record
1395 format over the serial line.
1398 bool "scsi - Access to SCSI devices"
1401 This provides a 'scsi' command which provides access to SCSI (Small
1402 Computer System Interface) devices. The command provides a way to
1403 scan the bus, reset the bus, read and write data and get information
1407 bool "sdram - Print SDRAM configuration information"
1409 Provides information about attached SDRAM. This assumed that the
1410 SDRAM has an EEPROM with information that can be read using the
1411 I2C bus. This is only available on some boards.
1415 depends on DM_SPI_FLASH || SPI_FLASH
1416 default y if DM_SPI_FLASH
1421 bool "sf test - Allow testing of SPI flash"
1424 Provides a way to test that SPI flash is working correctly. The
1425 test is destructive, in that an area of SPI flash must be provided
1426 for the test to use. Performance information is also provided,
1427 measuring the performance of reading, writing and erasing in
1428 Mbps (Million Bits Per Second). This value should approximately
1429 equal the SPI bus speed for a single-bit-wide SPI bus, assuming
1430 everything is working properly.
1433 bool "sspi - Command to access spi device"
1436 SPI utility command.
1438 config DEFAULT_SPI_BUS
1439 int "default spi bus used by sspi command"
1443 config DEFAULT_SPI_MODE
1444 hex "default spi mode used by sspi command (see include/spi.h)"
1449 bool "tsi148 - Command to access tsi148 device"
1451 This provides various sub-commands to initialise and configure the
1452 Turndra tsi148 device. See the command help for full details.
1455 bool "Enable UFS - Universal Flash Subsystem commands"
1458 "This provides commands to initialise and configure universal flash
1462 bool "universe - Command to set up the Turndra Universe controller"
1464 This allows setting up the VMEbus provided by this controller.
1465 See the command help for full details.
1470 select HAVE_BLOCK_DEVICE
1476 select USB_FUNCTION_SDP
1478 Enables the command "sdp" which is used to have U-Boot emulating the
1479 Serial Download Protocol (SDP) via USB.
1483 depends on USB_FUNCTION_ROCKUSB
1485 Rockusb protocol is widely used by Rockchip SoC based devices. It can
1486 read/write info, image to/from devices. This enable rockusb command
1487 support to communication with rockusb device. for more detail about
1488 this command, please read doc/README.rockusb.
1490 config CMD_USB_MASS_STORAGE
1491 bool "UMS usb mass storage"
1492 depends on USB_GADGET_DOWNLOAD
1493 select USB_FUNCTION_MASS_STORAGE
1494 depends on BLK && USB_GADGET
1496 Enables the command "ums" and the USB mass storage support to the
1497 export a block device: U-Boot, the USB device, acts as a simple
1498 external hard drive plugged on the host USB port.
1501 bool "Xen para-virtualized block device"
1505 Xen para-virtualized block device support
1510 depends on HAVE_BLOCK_DEVICE
1513 VirtIO block device support
1519 This provides commands to control the watchdog timer devices.
1525 Enable the command "axi" for accessing AXI (Advanced eXtensible
1526 Interface) busses, a on-chip interconnect specification for managing
1527 functional blocks in SoC designs, which is also often used in designs
1528 involving FPGAs (e.g. communication with IP cores in Xilinx FPGAs).
1532 menu "Shell scripting commands"
1538 Echo args to console
1544 Return true/false on integer compare.
1550 Run script from memory
1556 Evaluate boolean and math expressions and store the result in an env
1558 Also supports loading the value at a memory location into a variable.
1559 If CONFIG_REGEX is enabled, setexpr also supports a gsub function.
1561 config CMD_SETEXPR_FMT
1563 depends on CMD_SETEXPR
1565 Evaluate format string expression and store result in an environment
1570 menu "Android support commands"
1572 config CMD_AB_SELECT
1574 depends on ANDROID_AB
1576 On Android devices with more than one boot slot (multiple copies of
1577 the kernel and system images) this provides a command to select which
1578 slot should be used to boot from and register the boot attempt. This
1579 is used by the new A/B update model where one slot is updated in the
1580 background while running from the other slot.
1587 bool "Network commands"
1597 bootp - boot image via network using BOOTP/TFTP protocol
1601 depends on CMD_BOOTP
1603 Boot image via network using DHCP/TFTP protocol
1605 config BOOTP_MAY_FAIL
1606 bool "Allow for the BOOTP/DHCP server to not be found"
1607 depends on CMD_BOOTP
1609 If the DHCP server is not found after the configured retry count, the
1610 call will fail instead of starting over. This can be used to fail
1611 over to Link-local IP address configuration if the DHCP server is not
1614 config BOOTP_BOOTPATH
1615 bool "Request & store 'rootpath' from BOOTP/DHCP server"
1617 depends on CMD_BOOTP
1619 Even though the config is called BOOTP_BOOTPATH, it stores the
1620 path in the variable 'rootpath'.
1622 config BOOTP_VENDOREX
1623 bool "Support vendor extensions from BOOTP/DHCP server"
1624 depends on CMD_BOOTP
1626 config BOOTP_BOOTFILESIZE
1627 bool "Request & store 'bootfilesize' from BOOTP/DHCP server"
1628 depends on CMD_BOOTP
1631 bool "Request & store 'dnsip' from BOOTP/DHCP server"
1633 depends on CMD_BOOTP
1635 The primary DNS server is stored as 'dnsip'. If two servers are
1636 returned, you must set BOOTP_DNS2 to store that second server IP
1640 bool "Store 'dnsip2' from BOOTP/DHCP server"
1641 depends on BOOTP_DNS
1643 If a DHCP client requests the DNS server IP from a DHCP server,
1644 it is possible that more than one DNS serverip is offered to the
1645 client. If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS
1646 server IP will be stored in the additional environment
1647 variable "dnsip2". The first DNS serverip is always
1648 stored in the variable "dnsip", when BOOTP_DNS is defined.
1650 config BOOTP_GATEWAY
1651 bool "Request & store 'gatewayip' from BOOTP/DHCP server"
1653 depends on CMD_BOOTP
1655 config BOOTP_HOSTNAME
1656 bool "Request & store 'hostname' from BOOTP/DHCP server"
1658 depends on CMD_BOOTP
1660 The name may or may not be qualified with the local domain name.
1662 config BOOTP_PREFER_SERVERIP
1663 bool "serverip variable takes precedent over DHCP server IP."
1664 depends on CMD_BOOTP
1666 By default a BOOTP/DHCP reply will overwrite the 'serverip' variable.
1668 With this option enabled, the 'serverip' variable in the environment
1669 takes precedence over DHCP server IP and will only be set by the DHCP
1670 server if not already set in the environment.
1672 config BOOTP_SUBNETMASK
1673 bool "Request & store 'netmask' from BOOTP/DHCP server"
1675 depends on CMD_BOOTP
1677 config BOOTP_NISDOMAIN
1678 bool "Request & store 'nisdomain' from BOOTP/DHCP server"
1679 depends on CMD_BOOTP
1681 config BOOTP_NTPSERVER
1682 bool "Request & store 'ntpserverip' from BOOTP/DHCP server"
1683 depends on CMD_BOOTP
1685 config BOOTP_TIMEOFFSET
1686 bool "Request & store 'timeoffset' from BOOTP/DHCP server"
1687 depends on CMD_BOOTP && CMD_SNTP
1692 Selecting this will allow capturing all Ethernet packets and store
1693 them in physical memory in a PCAP formated file,
1694 later to be analyzed by PCAP reader application (IE. WireShark).
1697 bool "Send PXE client arch to BOOTP/DHCP server"
1699 depends on CMD_BOOTP && CMD_PXE
1701 Supported for ARM, ARM64, and x86 for now.
1703 config BOOTP_PXE_CLIENTARCH
1705 depends on BOOTP_PXE
1706 default 0x16 if ARM64
1710 config BOOTP_VCI_STRING
1712 depends on CMD_BOOTP
1713 default "U-Boot.armv7" if CPU_V7A || CPU_V7M || CPU_V7R
1714 default "U-Boot.armv8" if ARM64
1715 default "U-Boot.arm" if ARM
1722 tftpboot - boot image via network using TFTP protocol
1726 depends on CMD_TFTPBOOT
1728 TFTP put command, for uploading files to a server
1732 depends on CMD_TFTPBOOT
1734 Act as a TFTP server and boot the first received file
1736 config NET_TFTP_VARS
1737 bool "Control TFTP timeout and count through environment"
1738 depends on CMD_TFTPBOOT
1741 If set, allows controlling the TFTP timeout through the
1742 environment variable tftptimeout, and the TFTP maximum
1743 timeout count through the variable tftptimeoutcountmax.
1744 If unset, timeout and maximum are hard-defined as 1 second
1745 and 10 timouts per TFTP transfer.
1750 Boot image via network using RARP/TFTP protocol
1756 Boot image via network using NFS protocol.
1759 int "Timeout in milliseconds for NFS mounts"
1763 Timeout in milliseconds used in NFS protocol. If you encounter
1764 "ERROR: Cannot umount" in nfs command, try longer timeout such as
1767 config SYS_DISABLE_AUTOLOAD
1768 bool "Disable automatically loading files over the network"
1769 depends on CMD_BOOTP || CMD_DHCP || CMD_NFS || CMD_RARP
1771 Typically, commands such as "dhcp" will attempt to automatically
1772 load a file from the network, once the initial network configuration
1773 is complete. Enable this option to disable this behavior and instead
1774 require files to be loaded over the network by subsequent commands.
1780 If set, allows 802.3(clause 22) MII Management functions interface access
1781 The management interface specified in Clause 22 provides
1782 a simple, two signal, serial interface to connect a
1783 Station Management entity and a managed PHY for providing access
1784 to management parameters and services.
1785 The interface is referred to as the MII management interface.
1788 bool "Call mii_init() in the mii command"
1789 depends on CMD_MII && (MPC8XX_FEC || FSLDMAFE || MCFFEC)
1795 If set, allows Enable 802.3(clause 45) MDIO interface registers access
1796 The MDIO interface is orthogonal to the MII interface and extends
1797 it by adding access to more registers through indirect addressing.
1802 Send ICMP ECHO_REQUEST to network host
1807 Perform CDP network configuration
1813 Synchronize RTC via network
1818 Lookup the IP of a hostname
1820 config CMD_LINK_LOCAL
1824 Acquire a network IP address using the link-local protocol
1831 Allow control of L2 Ethernet switch commands. These are supported
1832 by the vsc9953 Ethernet driver at present. Sub-commands allow
1833 operations such as enabling / disabling a port and
1834 viewing/maintaining the filtering database (FDB)
1840 Boot image via network using PXE protocol
1845 Wait for wake-on-lan Magic Packet
1849 menu "Misc commands"
1852 bool "Enable 'bmp' command"
1853 depends on LCD || DM_VIDEO || VIDEO
1855 This provides a way to obtain information about a BMP-format image
1856 and to display it. BMP (which presumably stands for BitMaP) is a
1857 file format defined by Microsoft which supports images of various
1858 depths, formats and compression methods. Headers on the file
1859 determine the formats used. This command can be used by first loading
1860 the image into RAM, then using this command to look at it or display
1863 config CMD_BOOTCOUNT
1865 depends on BOOTCOUNT_LIMIT
1867 Enable the bootcount command, which allows interrogation and
1868 reset of the bootcounter.
1871 bool "Enable board-specific commands"
1873 (deprecated: instead, please define a Kconfig option for each command)
1875 Some boards have board-specific commands which are only enabled
1876 during developemnt and need to be turned off for production. This
1877 option provides a way to control this. The commands that are enabled
1878 vary depending on the board.
1880 config CMD_BLOCK_CACHE
1881 bool "blkcache - control and stats for block cache"
1882 depends on BLOCK_CACHE
1883 default y if BLOCK_CACHE
1885 Enable the blkcache command, which can be used to control the
1886 operation of the cache functions.
1887 This is most useful when fine-tuning the operation of the cache
1888 during development, but also allows the cache to be disabled when
1889 it might hurt performance (e.g. when using the ums command).
1896 Enable the 'button' command which allows to get the status of
1897 buttons supported by the board. The buttonss can be listed with
1898 'button list' and state can be known with 'button <label>'.
1899 Any button drivers can be controlled with this command, e.g.
1903 bool "icache or dcache"
1905 Enable the "icache" and "dcache" commands
1907 config CMD_CONITRACE
1908 bool "conitrace - trace console input codes"
1910 Enable the 'conitrace' command which displays the codes received
1911 from the console input as hexadecimal numbers.
1914 bool "Enable clear screen command 'cls'"
1915 depends on DM_VIDEO || LCD || VIDEO
1918 Enable the 'cls' command which clears the screen contents
1919 on video frame buffer.
1922 bool "efidebug - display/configure UEFI environment"
1923 depends on EFI_LOADER
1924 select EFI_DEVICE_PATH_TO_TEXT
1926 Enable the 'efidebug' command which provides a subset of UEFI
1927 shell utility with simplified functionality. It will be useful
1928 particularly for managing boot parameters as well as examining
1929 various EFI status for debugging.
1931 config CMD_EXCEPTION
1932 bool "exception - raise exception"
1933 depends on ARM || RISCV || SANDBOX || X86
1935 Enable the 'exception' command which allows to raise an exception.
1942 Enable the 'led' command which allows for control of LEDs supported
1943 by the board. The LEDs can be listed with 'led list' and controlled
1944 with led on/off/togle/blink. Any LED drivers can be controlled with
1945 this command, e.g. led_gpio.
1952 Enable the 'date' command for getting/setting the time/date in RTC
1959 Enable the 'rtc' command for low-level access to RTC devices.
1964 Run commands and summarize execution time.
1967 bool "gettime - read elapsed time"
1969 Enable the 'gettime' command which reads the elapsed time since
1970 U-Boot started running. This shows the time in seconds and
1971 milliseconds. See also the 'bootstage' command which provides more
1972 flexibility for boot timing.
1975 bool "pause command"
1977 Delay execution waiting for any user input.
1978 Useful to allow the user to read a failure log.
1983 default y if SANDBOX
1986 Print bytes from the hardware random number generator.
1988 config CMD_KASLRSEED
1992 Set the kaslr-seed in the chosen node with entropy provided by a
1993 hardware random number generator.
1999 Delay execution for some time
2002 bool "support for multiprocessor commands"
2006 This enables commands to bringup different processors
2007 in multiprocessor cases.
2012 Access the system timer.
2018 This provides basic access to the U-Boot's sound support. The main
2019 feature is to play a beep.
2021 sound init - set up sound system
2022 sound play - play a sound
2028 Boot image via local extlinux.conf file
2034 This provides access to the QEMU firmware interface. The main
2035 feature is to allow easy loading of files passed to qemu-system
2036 via -kernel / -initrd
2041 This provides access to Linux PStore with Rammoops backend. The main
2042 feature is to allow to display or save PStore records.
2044 See doc/pstore.rst for more information.
2048 config CMD_PSTORE_MEM_ADDR
2049 hex "Memory Address"
2050 depends on CMD_PSTORE
2052 Base addr used for PStore ramoops memory, should be identical to
2053 ramoops.mem_address parameter used by kernel
2055 config CMD_PSTORE_MEM_SIZE
2057 depends on CMD_PSTORE
2060 Size of PStore ramoops memory, should be identical to ramoops.mem_size
2061 parameter used by kernel, a power of 2 and larger than the sum of the
2064 config CMD_PSTORE_RECORD_SIZE
2065 hex "Dump record size"
2066 depends on CMD_PSTORE
2069 Size of each dump done on oops/panic, should be identical to
2070 ramoops.record_size parameter used by kernel and a power of 2
2073 config CMD_PSTORE_CONSOLE_SIZE
2074 hex "Kernel console log size"
2075 depends on CMD_PSTORE
2078 Size of kernel console log, should be identical to
2079 ramoops.console_size parameter used by kernel and a power of 2
2082 config CMD_PSTORE_FTRACE_SIZE
2083 hex "FTrace log size"
2084 depends on CMD_PSTORE
2087 Size of ftrace log, should be identical to ramoops.ftrace_size
2088 parameter used by kernel and a power of 2
2090 config CMD_PSTORE_PMSG_SIZE
2091 hex "User space message log size"
2092 depends on CMD_PSTORE
2095 Size of user space message log, should be identical to
2096 ramoops.pmsg_size parameter used by kernel and a power of 2
2098 config CMD_PSTORE_ECC_SIZE
2100 depends on CMD_PSTORE
2103 if non-zero, the option enables ECC support and specifies ECC buffer
2104 size in bytes (1 is a special value, means 16 bytes ECC), should be
2105 identical to ramoops.ramoops_ecc parameter used by kernel
2109 source "cmd/mvebu/Kconfig"
2112 bool "terminal - provides a way to attach a serial terminal"
2114 Provides a 'cu'-like serial terminal command. This can be used to
2115 access other serial ports from the system console. The terminal
2116 is very simple with no special processing of characters. As with
2117 cu, you can press ~. (tilde followed by period) to exit.
2120 bool "uuid, guid - generation of unique IDs"
2123 This enables two commands:
2125 uuid - generate random Universally Unique Identifier
2126 guid - generate Globally Unique Identifier based on random UUID
2128 The two commands are very similar except for the endianness of the
2133 source "cmd/ti/Kconfig"
2135 config CMD_BOOTSTAGE
2136 bool "Enable the 'bootstage' command"
2137 depends on BOOTSTAGE
2139 Add a 'bootstage' command which supports printing a report
2140 and un/stashing of bootstage data.
2142 menu "Power commands"
2144 bool "Enable Driver Model PMIC command"
2147 This is the pmic command, based on a driver model pmic's API.
2148 Command features are unchanged:
2149 - list - list pmic devices
2150 - pmic dev <id> - show or [set] operating pmic device (NEW)
2151 - pmic dump - dump registers
2152 - pmic read address - read byte of register at address
2153 - pmic write address - write byte to register at address
2154 The only one change for this command is 'dev' subcommand.
2156 config CMD_REGULATOR
2157 bool "Enable Driver Model REGULATOR command"
2158 depends on DM_REGULATOR
2160 This command is based on driver model regulator's API.
2161 User interface features:
2162 - list - list regulator devices
2163 - regulator dev <id> - show or [set] operating regulator device
2164 - regulator info - print constraints info
2165 - regulator status - print operating status
2166 - regulator value <val] <-f> - print/[set] voltage value [uV]
2167 - regulator current <val> - print/[set] current value [uA]
2168 - regulator mode <id> - print/[set] operating mode id
2169 - regulator enable - enable the regulator output
2170 - regulator disable - disable the regulator output
2172 The '-f' (force) option can be used for set the value which exceeds
2173 the limits, which are found in device-tree and are kept in regulator's
2174 uclass plat structure.
2178 menu "Security commands"
2180 bool "Enable the 'aes' command"
2183 This provides a means to encrypt and decrypt data using the AES
2184 (Advanced Encryption Standard). This algorithm uses a symetric key
2185 and is widely used as a streaming cipher. Different key lengths are
2186 supported by the algorithm but this command only supports 128 bits
2190 bool "Enable the 'blob' command"
2191 depends on !MX6ULL && !MX6SLL && !MX6SL
2192 select IMX_HAB if ARCH_MX6 || ARCH_MX7 || ARCH_MX7ULP || ARCH_IMX8M
2194 This is used with the Freescale secure boot mechanism.
2196 Freescale's SEC block has built-in Blob Protocol which provides
2197 a method for protecting user-defined data across system power
2198 cycles. SEC block protects data in a data structure called a Blob,
2199 which provides both confidentiality and integrity protection.
2201 Encapsulating data as a blob
2202 Each time that the Blob Protocol is used to protect data, a
2203 different randomly generated key is used to encrypt the data.
2204 This random key is itself encrypted using a key which is derived
2205 from SoC's non-volatile secret key and a 16 bit Key identifier.
2206 The resulting encrypted key along with encrypted data is called a
2207 blob. The non-volatile secure key is available for use only during
2210 During decapsulation, the reverse process is performed to get back
2214 blob enc - encapsulating data as a cryptgraphic blob
2215 blob dec - decapsulating cryptgraphic blob to get the data
2219 blob enc src dst len km
2221 Encapsulate and create blob of data $len bytes long
2222 at address $src and store the result at address $dst.
2223 $km is the 16 byte key modifier is also required for
2224 generation/use as key for cryptographic operation. Key
2225 modifier should be 16 byte long.
2227 blob dec src dst len km
2229 Decapsulate the blob of data at address $src and
2230 store result of $len byte at addr $dst.
2231 $km is the 16 byte key modifier is also required for
2232 generation/use as key for cryptographic operation. Key
2233 modifier should be 16 byte long.
2236 bool "Support 'hash' command"
2239 This provides a way to hash data in memory using various supported
2240 algorithms (such as SHA1, MD5, CRC32). The computed digest can be
2241 saved to memory or to an environment variable. It is also possible
2242 to verify a hash against data in memory.
2245 bool "Support the 'hvc' command"
2246 depends on ARM_SMCCC
2248 Allows issuing Hypervisor Calls (HVCs). Mostly useful for
2249 development and testing.
2252 bool "Support the 'smc' command"
2253 depends on ARM_SMCCC
2255 Allows issuing Secure Monitor Calls (SMCs). Mostly useful for
2256 development and testing.
2262 Add -v option to verify data against a hash.
2265 bool "scp03 - SCP03 enable and rotate/provision operations"
2268 This command provides access to a Trusted Application
2269 running in a TEE to request Secure Channel Protocol 03
2270 (SCP03) enablement and/or rotation of its SCP03 keys.
2279 bool "Enable the 'tpm' command"
2280 depends on TPM_V1 || TPM_V2
2281 select CMD_TPM_V1 if TPM_V1
2282 select CMD_TPM_V2 if TPM_V2
2284 This provides a means to talk to a TPM from the command line. A wide
2285 range of commands if provided - see 'tpm help' for details. The
2286 command requires a suitable TPM on your board and the correct driver
2292 bool "Enable the 'tpm test' command"
2295 This provides a a series of tests to confirm that the TPMv1.x is
2296 working correctly. The tests cover initialisation, non-volatile RAM,
2297 extend, global lock and checking that timing is within expectations.
2298 The tests pass correctly on Infineon TPMs but may need to be adjusted
2305 menu "Firmware commands"
2307 bool "Enable crosec command"
2311 Enable command-line access to the Chrome OS EC (Embedded
2312 Controller). This provides the 'crosec' command which has
2313 a number of sub-commands for performing EC tasks such as
2314 updating its flash, accessing a small saved context area
2315 and talking to the I2C bus behind the EC (if there is one).
2318 menu "Filesystem commands"
2320 bool "Enable the 'btrsubvol' command"
2323 This enables the 'btrsubvol' command to list subvolumes
2324 of a BTRFS filesystem. There are no special commands for
2325 listing BTRFS directories or loading BTRFS files - this
2326 can be done by the generic 'fs' commands (see CMD_FS_GENERIC)
2327 when BTRFS is enabled (see FS_BTRFS).
2330 bool "Enable the 'cbfs' command"
2333 Define this to enable support for reading from a Coreboot
2334 filesystem. This is a ROM-based filesystem used for accessing files
2335 on systems that use coreboot as the first boot-loader and then load
2336 U-Boot to actually boot the Operating System. Available commands are
2337 cbfsinit, cbfsinfo, cbfsls and cbfsload.
2340 bool "Enable the 'cramfs' command"
2341 depends on FS_CRAMFS
2343 This provides commands for dealing with CRAMFS (Compressed ROM
2344 filesystem). CRAMFS is useful when space is tight since files are
2345 compressed. Two commands are provided:
2347 cramfsls - lists files in a cramfs image
2348 cramfsload - loads a file from a cramfs image
2351 bool "EROFS command support"
2354 Support for the EROFS fs
2357 bool "ext2 command support"
2360 Enables EXT2 FS command
2363 bool "ext4 command support"
2366 Enables EXT4 FS command
2368 config CMD_EXT4_WRITE
2370 bool "ext4 write command support"
2373 Enables EXT4 FS write command
2376 bool "FAT command support"
2379 Support for the FAT fs
2382 bool "SquashFS command support"
2385 Enables SquashFS filesystem commands (e.g. load, ls).
2387 config CMD_FS_GENERIC
2388 bool "filesystem commands"
2390 Enables filesystem commands (e.g. load, ls) that work for multiple
2394 bool "fsuuid command"
2396 Enables fsuuid command for filesystem UUID.
2399 bool "jffs2 command"
2402 Enables commands to support the JFFS2 (Journalling Flash File System
2403 version 2) filesystem. This enables fsload, ls and fsinfo which
2404 provide the ability to load files, list directories and obtain
2405 filesystem information.
2408 string "Default device for JFFS2"
2409 depends on CMD_JFFS2
2412 The default device to use with the jffs2 command.
2414 config JFFS2_PART_OFFSET
2415 hex "Default offset within flash to locate the JFFS2 image"
2416 depends on CMD_JFFS2
2419 The default offset within flash to locate the JFFS2 image.
2421 config JFFS2_PART_SIZE
2422 hex "Default size of JFFS2 partition"
2423 depends on CMD_JFFS2
2426 The default size of the JFFS2 partition
2429 bool "MTD partition support"
2432 MTD partitioning tool support.
2433 It is strongly encouraged to avoid using this command
2434 anymore along with 'sf', 'nand', 'onenand'. One can still
2435 declare the partitions in the mtdparts environment variable
2436 but better use the MTD stack and the 'mtd' command instead.
2438 config CMD_MTDPARTS_SPREAD
2439 bool "Padd partition size to take account of bad blocks"
2440 depends on CMD_MTDPARTS
2442 This enables the 'spread' sub-command of the mtdparts command.
2443 This command will modify the existing mtdparts variable by increasing
2444 the size of the partitions such that 1) each partition's net size is
2445 at least as large as the size specified in the mtdparts variable and
2446 2) each partition starts on a good block.
2448 config CMD_MTDPARTS_SHOW_NET_SIZES
2449 bool "Show net size (w/o bad blocks) of partitions"
2450 depends on CMD_MTDPARTS
2452 Adds two columns to the printed partition table showing the
2453 effective usable size of a partition, if bad blocks are taken
2456 config MTDIDS_DEFAULT
2457 string "Default MTD IDs"
2458 depends on MTD || SPI_FLASH
2460 Defines a default MTD IDs list for use with MTD partitions in the
2461 Linux MTD command line partitions format.
2463 config MTDPARTS_DEFAULT
2464 string "Default MTD partition scheme"
2465 depends on MTD || SPI_FLASH
2467 Defines a default MTD partitioning scheme in the Linux MTD command
2468 line partitions format
2471 bool "reiser - Access to reiserfs filesystems"
2473 This provides two commands which operate on a resierfs filesystem,
2474 commonly used some years ago:
2476 reiserls - list files
2477 reiserload - load a file
2480 bool "yaffs2 - Access of YAFFS2 filesystem"
2484 This provides commands for accessing a YAFFS2 filesystem. Yet
2485 Another Flash Filesystem 2 is a filesystem designed specifically
2486 for NAND flash. It incorporates bad-block management and ensures
2487 that device writes are sequential regardless of filesystem
2491 bool "zfs - Access of ZFS filesystem"
2493 This provides commands to accessing a ZFS filesystem, commonly used
2494 on Solaris systems. Two sub-commands are provided:
2496 zfsls - list files in a directory
2497 zfsload - load a file
2499 See doc/README.zfs for more details.
2503 menu "Debug commands"
2505 config CMD_CBSYSINFO
2508 default y if SYS_COREBOOT
2510 This provides information about the coreboot sysinfo table stored in
2511 memory by coreboot before jumping to U-Boot. It can be useful for
2512 debugging the beaaviour of coreboot or U-Boot.
2515 bool "diag - Board diagnostics"
2517 This command provides access to board diagnostic tests. These are
2518 called Power-on Self Tests (POST). The command allows listing of
2519 available tests and running either all the tests, or specific tests
2523 bool "event - Show information about events"
2524 default y if EVENT_DEBUG
2526 This enables the 'event' command which provides information about
2527 events and event-handler routines. This can help to device event
2531 bool "irq - Show information about interrupts"
2532 depends on !ARM && !MIPS && !RISCV && !SH
2534 This enables two commands:
2536 interrupts - enable or disable interrupts
2537 irqinfo - print device-specific interrupt information
2540 bool "kgdb - Allow debugging of U-Boot with gdb"
2543 This enables a 'kgdb' command which allows gdb to connect to U-Boot
2544 over a serial link for debugging purposes. This allows
2545 single-stepping, inspecting variables, etc. This is supported only
2546 on PowerPC at present.
2549 bool "log - Generation, control and access to logging"
2553 This provides access to logging features. It allows the output of
2554 log data to be controlled to a limited extent (setting up the default
2555 maximum log level for emitting of records). It also provides access
2556 to a command used for testing the log system.
2559 bool "trace - Support tracing of function calls and timing"
2563 Enables a command to control using of function tracing within
2564 U-Boot. This allows recording of call traces including timing
2565 information. The command can write data to memory for exporting
2566 for analysis (e.g. using bootchart). See doc/README.trace for full
2570 bool "avb - Android Verified Boot 2.0 operations"
2571 depends on AVB_VERIFY
2573 Enables a "avb" command to perform verification of partitions using
2574 Android Verified Boot 2.0 functionality. It includes such subcommands:
2575 avb init - initialize avb2 subsystem
2576 avb read_rb - read rollback index
2577 avb write_rb - write rollback index
2578 avb is_unlocked - check device lock state
2579 avb get_uuid - read and print uuid of a partition
2580 avb read_part - read data from partition
2581 avb read_part_hex - read data from partition and output to stdout
2582 avb write_part - write data to partition
2583 avb verify - run full verification chain
2585 config CMD_STACKPROTECTOR_TEST
2586 bool "Test command for stack protector"
2587 depends on STACKPROTECTOR
2589 Enable stackprot_test command
2590 The stackprot_test command will force a stack overrun to test
2591 the stack smashing detection mechanisms.
2596 tristate "Enable UBI - Unsorted block images commands"
2599 UBI is a software layer above MTD layer which admits use of LVM-like
2600 logical volumes on top of MTD devices, hides some complexities of
2601 flash chips like wear and bad blocks and provides some other useful
2602 capabilities. Please, consult the MTD web site for more details
2603 (www.linux-mtd.infradead.org). Activate this option if you want
2604 to use U-Boot UBI commands.
2605 It is also strongly encouraged to also enable CONFIG_MTD to get full
2608 config CMD_UBI_RENAME
2609 bool "Enable rename"
2612 Enable a "ubi" command to rename ubi volume:
2613 ubi rename <oldname> <newname>
2616 tristate "Enable UBIFS - Unsorted block images filesystem commands"
2618 default y if CMD_UBI
2622 UBIFS is a file system for flash devices which works on top of UBI.
2624 config MMC_SPEED_MODE_SET
2625 bool "set speed mode using mmc command"
2629 Enable setting speed mode using mmc rescan and mmc dev commands.
2630 The speed mode is provided as the last argument in these commands
2631 and is indicated using the index from enum bus_mode in
2632 include/mmc.h. A speed mode can be set only if it has already
2633 been enabled in the device tree.
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