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
336 default y if BOOTSTD_FULL
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.
475 Print file as hexdump to standard output
478 bool "spl export - Export boot information for Falcon boot"
481 Falcon mode allows booting directly from SPL into an Operating
482 System such as Linux, thus skipping U-Boot proper. See
483 doc/README.falcon for full information about how to use this
486 config CMD_SPL_NAND_OFS
487 hex "Offset of OS args or dtb for Falcon-mode NAND boot"
488 depends on CMD_SPL && (TPL_NAND_SUPPORT || SPL_NAND_SUPPORT)
491 This provides the offset of the command line arguments for Linux
492 when booting from NAND in Falcon mode. See doc/README.falcon
493 for full information about how to use this option (and also see
494 board/gateworks/gw_ventana/README for an example).
496 config CMD_SPL_NOR_OFS
497 hex "Offset of OS args or dtb for Falcon-mode NOR boot"
498 depends on CMD_SPL && SPL_NOR_SUPPORT
501 This provides the offset of the command line arguments or dtb for
502 Linux when booting from NOR in Falcon mode.
504 config CMD_SPL_WRITE_SIZE
505 hex "Size of argument area"
509 This provides the size of the command-line argument area in NAND
510 flash used by Falcon-mode boot. See the documentation until CMD_SPL
513 config CMD_THOR_DOWNLOAD
514 bool "thor - TIZEN 'thor' download"
517 Implements the 'thor' download protocol. This is a way of
518 downloading a software update over USB from an attached host.
519 There is no documentation about this within the U-Boot source code
520 but you should be able to find something on the interwebs.
523 bool "zboot - x86 boot command"
525 With x86 machines it is common to boot a bzImage file which
526 contains both a kernel and a setup.bin file. The latter includes
527 configuration information from the dark ages which x86 boards still
528 need to pick things out of.
530 Consider using FIT in preference to this since it supports directly
531 booting both 32- and 64-bit kernels, as well as secure boot.
532 Documentation is available in doc/uImage.FIT/x86-fit-boot.txt
536 menu "Environment commands"
539 bool "ask for env variable"
541 Ask for environment variable
559 Edit environment variable.
564 Allow for searching environment variables
570 Save all environment variables into the compiled-in persistent
575 depends on CMD_SAVEENV
577 Erase environment variables from the compiled-in persistent
580 config CMD_ENV_EXISTS
584 Check if a variable is defined in the environment for use in
587 config CMD_ENV_CALLBACK
588 bool "env callbacks - print callbacks and their associated variables"
590 Some environment variable have callbacks defined by
591 U_BOOT_ENV_CALLBACK. These are called when the variable changes.
592 For example changing "baudrate" adjust the serial baud rate. This
593 command lists the currently defined callbacks.
596 bool "env flags -print variables that have non-default flags"
598 Some environment variables have special flags that control their
599 behaviour. For example, serial# can only be written once and cannot
600 be deleted. This command shows the variables that have special
603 config CMD_NVEDIT_EFI
604 bool "env [set|print] -e - set/print UEFI variables"
605 depends on EFI_LOADER
608 UEFI variables are encoded as some form of U-Boot variables.
609 If enabled, we are allowed to set/print UEFI variables using
610 "env" command with "-e" option without knowing details.
612 config CMD_NVEDIT_INDIRECT
613 bool "env indirect - Sets environment value from another"
615 config CMD_NVEDIT_INFO
616 bool "env info - print or evaluate environment information"
618 Print environment information:
619 - env_valid : is environment valid
620 - env_ready : is environment imported into hash table
621 - env_use_default : is default environment used
623 This command can be optionally used for evaluation in scripts:
624 [-d] : evaluate whether default environment is used
625 [-p] : evaluate whether environment can be persisted
627 The result of multiple evaluations will be combined with AND.
629 config CMD_NVEDIT_LOAD
632 Load all environment variables from the compiled-in persistent
635 config CMD_NVEDIT_SELECT
638 Select the compiled-in persistent storage of environment variables.
642 menu "Memory commands"
647 Compute binary operations (xor, or, and) of byte arrays of arbitrary
648 size from memory and store the result in memory or the environment.
652 default y if BLOBLIST
654 Show information about the bloblist, a collection of binary blobs
655 held in memory that persist between SPL and U-Boot. In the case of
656 x86 devices the bloblist can be used to hold ACPI tables so that they
657 remain available in memory.
670 Add -v option to verify data against a crc32 checksum.
673 bool "eeprom - EEPROM subsystem"
675 (deprecated, needs conversion to driver model)
676 Provides commands to read and write EEPROM (Electrically Erasable
677 Programmable Read Only Memory) chips that are connected over an
680 config CMD_EEPROM_LAYOUT
681 bool "Enable layout-aware eeprom commands"
682 depends on CMD_EEPROM
684 (deprecated, needs conversion to driver model)
685 When enabled, additional eeprom sub-commands become available.
687 eeprom print - prints the contents of the eeprom in a human-readable
688 way (eeprom layout fields, and data formatted to be fit for human
691 eeprom update - allows user to update eeprom fields by specifying
692 the field name, and providing the new data in a human readable format
693 (same format as displayed by the eeprom print command).
695 Both commands can either auto detect the layout, or be told which
699 __weak int parse_layout_version(char *str)
700 - override to provide your own layout name parsing
701 __weak void __eeprom_layout_assign(struct eeprom_layout *layout,
703 - override to setup the layout metadata based on the version
704 __weak int eeprom_layout_detect(unsigned char *data)
705 - override to provide your own algorithm for detecting layout
708 - contains various printing and updating functions for common
709 types of eeprom fields. Can be used for defining
712 config EEPROM_LAYOUT_HELP_STRING
713 string "Tells user what layout names are supported"
714 depends on CMD_EEPROM_LAYOUT
715 default "<not defined>"
717 Help printed with the LAYOUT VERSIONS part of the 'eeprom'
720 config SYS_I2C_EEPROM_BUS
721 int "I2C bus of the EEPROM device."
722 depends on CMD_EEPROM
725 config SYS_I2C_EEPROM_ADDR_LEN
726 int "Length in bytes of the EEPROM memory array address"
727 depends on CMD_EEPROM || ID_EEPROM
731 Note: This is NOT the chip address length!
733 config SYS_EEPROM_SIZE
734 depends on CMD_EEPROM
735 int "Size in bytes of the EEPROM device"
738 config SYS_EEPROM_PAGE_WRITE_BITS
739 int "Number of bits used to address bytes in a single page"
740 depends on CMD_EEPROM
743 The EEPROM page size is 2^SYS_EEPROM_PAGE_WRITE_BITS.
744 A 64 byte page, for example would require six bits.
746 config SYS_EEPROM_PAGE_WRITE_DELAY_MS
747 int "Number of milliseconds to delay between page writes"
748 depends on CMD_EEPROM || CMD_I2C
754 Infinite write loop on address range
760 Compute MD5 checksum.
764 depends on CMD_MD5SUM
766 Add -v option to verify data against an MD5 checksum.
771 Display memory information.
774 bool "md, mm, nm, mw, cp, cmp, base, loop"
779 mm - memory modify (auto-incrementing address)
780 nm - memory modify (constant address)
781 mw - memory write (fill)
784 base - print or set address offset
785 loop - initialize loop on address range
787 config CMD_MEM_SEARCH
788 bool "ms - Memory search"
790 Memory-search command
792 This allows searching through a region of memory looking for hex
793 data (byte, 16-bit word, 32-bit long, also 64-bit on machines that
794 support it). It is also possible to search for a string. The
795 command accepts a memory range and a list of values to search for.
796 The values need to appear in memory in the same order they are given
797 in the command. At most 10 matches can be returned at a time, but
798 pressing return will show the next 10 matches. Environment variables
799 are set for use with scripting (memmatches, memaddr, mempos).
802 bool "Enable cyclic md/mw commands"
803 depends on CMD_MEMORY
805 Add the "mdc" and "mwc" memory commands. These are cyclic
810 This command will print 4 bytes (10,11,12,13) each 500 ms.
812 => mwc.l 100 12345678 10
813 This command will write 12345678 to address 100 all 10 ms.
818 depends on CMD_MEMORY && (LIB_RAND || LIB_HW_RAND)
820 random - fill memory with random data
825 Simple RAM read/write test.
829 config SYS_ALT_MEMTEST
830 bool "Alternative test"
832 Use a more complete alternative memory test.
836 config SYS_ALT_MEMTEST_BITFLIP
840 The alternative memory test includes bitflip test since 2020.07.
841 The bitflip test significantly increases the overall test time.
842 Bitflip test can optionally be disabled here.
846 config SYS_MEMTEST_START
847 hex "default start address for mtest"
850 This is the default start address for mtest for simple read/write
851 test. If no arguments are given to mtest, default address is used
854 config SYS_MEMTEST_END
855 hex "default end address for mtest"
858 This is the default end address for mtest for simple read/write
859 test. If no arguments are given to mtest, default address is used
868 Compute SHA1 checksum.
870 config SHA1SUM_VERIFY
872 depends on CMD_SHA1SUM
874 Add -v option to verify data against a SHA1 checksum.
877 bool "strings - display strings in memory"
879 This works similarly to the Unix 'strings' command except that it
880 works with a memory range. String of printable characters found
881 within the range are displayed. The minimum number of characters
882 for a sequence to be considered a string can be provided.
886 menu "Compression commands"
890 default y if CMD_BOOTI
893 Support decompressing an LZMA (Lempel-Ziv-Markov chain algorithm)
898 default y if CMD_BOOTI
901 Support decompressing an LZ4 image from memory region.
905 default y if CMD_BOOTI
908 Uncompress a zip-compressed memory region.
912 select GZIP_COMPRESSED
914 Compress a memory region with zlib deflate method.
918 menu "Device access commands"
921 #depends on FLASH_CFI_DRIVER
924 ARM Ltd reference designs flash partition access
927 bool "adc - Access Analog to Digital Converters info and data"
929 depends on DM_REGULATOR
931 Shows ADC device info and permit printing one-shot analog converted
932 data from a named Analog to Digital Converter.
937 depends on PARTITIONS
939 Read/modify/write the fields of Bootloader Control Block, usually
940 stored on the flash "misc" partition with its structure defined in:
941 https://android.googlesource.com/platform/bootable/recovery/+/master/
942 bootloader_message/include/bootloader_message/bootloader_message.h
944 Some real-life use-cases include (but are not limited to):
945 - Determine the "boot reason" (and act accordingly):
946 https://source.android.com/devices/bootloader/boot-reason
947 - Get/pass a list of commands from/to recovery:
948 https://android.googlesource.com/platform/bootable/recovery
949 - Inspect/dump the contents of the BCB fields
952 bool "bind/unbind - Bind or unbind a device to/from a driver"
955 Bind or unbind a device to/from a driver from the command line.
956 This is useful in situations where a device may be handled by several
957 drivers. For example, this can be used to bind a UDC to the usb ether
958 gadget driver from the command line.
961 bool "clk - Show clock frequencies"
964 Shows clock frequences by calling a sock_clk_dump() hook function.
965 This is depreated in favour of using the CLK uclass and accessing
966 clock values from associated drivers. However currently no command
970 bool "demo - Demonstration commands for driver model"
973 Provides a 'demo' command which can be used to play around with
974 driver model. To use this properly you will need to enable one or
975 both of the demo devices (DM_DEMO_SHAPE and DM_DEMO_SIMPLE).
976 Otherwise you will always get an empty list of devices. The demo
977 devices are defined in the sandbox device tree, so the easiest
978 option is to use sandbox and pass the -d point to sandbox's
985 Enables the command "dfu" which is used to have U-Boot create a DFU
986 class device via USB. This command requires that the "dfu_alt_info"
987 environment variable be set and define the alt settings to expose to
991 bool "dm - Access to driver model information"
994 Provides access to driver model data structures and information,
995 such as a list of devices, list of uclasses and the state of each
996 device (e.g. activated). This is not required for operation, but
997 can be useful to see the state of driver model for debugging or
1001 bool "fastboot - Android fastboot support"
1004 This enables the command "fastboot" which enables the Android
1005 fastboot mode for the platform. Fastboot is a protocol for
1006 downloading images, flashing and device control used on
1007 Android devices. Fastboot requires either the network stack
1008 enabled or support for acting as a USB device.
1010 See doc/android/fastboot.rst for more information.
1013 bool "flinfo, erase, protect"
1015 depends on MTD || FLASH_CFI_DRIVER || MTD_NOR_FLASH
1018 flinfo - print FLASH memory information
1019 erase - FLASH memory
1020 protect - enable or disable FLASH write protection
1029 config CMD_FPGA_LOADBP
1030 bool "fpga loadbp - load partial bitstream (Xilinx only)"
1033 Supports loading an FPGA device from a bitstream buffer containing
1034 a partial bitstream.
1036 config CMD_FPGA_LOADFS
1037 bool "fpga loadfs - load bitstream from FAT filesystem (Xilinx only)"
1040 Supports loading an FPGA device from a FAT filesystem.
1042 config CMD_FPGA_LOADMK
1043 bool "fpga loadmk - load bitstream from image"
1046 Supports loading an FPGA device from a image generated by mkimage.
1048 config CMD_FPGA_LOADP
1049 bool "fpga loadp - load partial bitstream"
1052 Supports loading an FPGA device from a bitstream buffer containing
1053 a partial bitstream.
1055 config CMD_FPGA_LOAD_SECURE
1056 bool "fpga loads - loads secure bitstreams"
1058 select FPGA_LOAD_SECURE
1060 Enables the fpga loads command which is used to load secure
1061 (authenticated or encrypted or both) bitstreams on to FPGA.
1064 bool "fpgad - dump FPGA registers"
1066 (legacy, needs conversion to driver model)
1067 Provides a way to dump FPGA registers by calling the board-specific
1068 fpga_get_reg() function. This functions similarly to the 'md'
1072 bool "fuse - support for the fuse subssystem"
1074 (deprecated - needs conversion to driver model)
1075 This allows reading, sensing, programming or overriding fuses
1076 which control the behaviour of the device. The command uses the
1084 config CMD_GPIO_READ
1085 bool "gpio read - save GPIO value to variable"
1088 Enables the 'gpio read' command that saves the value
1089 of a GPIO pin to a variable.
1095 Control PWM channels, this allows invert/config/enable/disable PWM channels.
1098 bool "GPT (GUID Partition Table) command"
1099 select EFI_PARTITION
1100 select PARTITION_UUIDS
1103 Enable the 'gpt' command to ready and write GPT style partition
1107 bool "GPT Random UUID generation"
1110 Enable the generation of partitions with random UUIDs if none
1113 config CMD_GPT_RENAME
1114 bool "GPT partition renaming commands"
1117 Enables the 'gpt' command to interchange names on two GPT
1118 partitions via the 'gpt swap' command or to rename single
1119 partitions via the 'rename' command.
1122 bool "ide - Support for IDE drivers"
1125 Provides an 'ide' command which allows accessing the IDE drive,
1126 resetting the IDE interface, printing the partition table and
1127 geting device info. It also enables the 'diskboot' command which
1128 permits booting from an IDE drive.
1131 bool "io - Support for performing I/O accesses"
1133 Provides an 'iod' command to display I/O space and an 'iow' command
1134 to write values to the I/O space. This can be useful for manually
1135 checking the state of devices during boot when debugging device
1139 bool "iotrace - Support for tracing I/O activity"
1141 Provides an 'iotrace' command which supports recording I/O reads and
1142 writes in a trace buffer in memory . It also maintains a checksum
1143 of the trace records (even if space is exhausted) so that the
1144 sequence of I/O accesses can be verified.
1146 When debugging drivers it is useful to see what I/O accesses were
1147 done and in what order.
1149 Even if the individual accesses are of little interest it can be
1150 useful to verify that the access pattern is consistent each time
1151 an operation is performed. In this case a checksum can be used to
1152 characterise the operation of a driver. The checksum can be compared
1153 across different runs of the operation to verify that the driver is
1156 In particular, when performing major refactoring of the driver, where
1157 the access pattern should not change, the checksum provides assurance
1158 that the refactoring work has not broken the driver.
1160 This works by sneaking into the io.h heder for an architecture and
1161 redirecting I/O accesses through iotrace's tracing mechanism.
1163 For now no commands are provided to examine the trace buffer. The
1164 format is fairly simple, so 'md' is a reasonable substitute.
1166 Note: The checksum feature is only useful for I/O regions where the
1167 contents do not change outside of software control. Where this is not
1168 suitable you can fall back to manually comparing the addresses. It
1169 might be useful to enhance tracing to only checksum the accesses and
1170 not the data read/written.
1180 bool "w1 - Support for Dallas 1-Wire protocol"
1182 Dallas 1-wire protocol support
1188 Load a binary file over serial line.
1193 Load a binary over memory mapped.
1199 Load an S-Record file over serial line
1201 config CMD_LOADXY_TIMEOUT
1202 int "loadxy_timeout"
1206 Initial timeout for loadx and loady commands. Zero means infinity.
1210 bool "lsblk - list block drivers and devices"
1212 Print list of available block device drivers, and for each, the list
1213 of known block devices.
1216 bool "MBR (Master Boot Record) command"
1217 select DOS_PARTITION
1219 Enable the 'mbr' command to ready and write MBR (Master Boot Record)
1220 style partition tables.
1226 Enable the command "misc" for accessing miscellaneous devices with
1227 a MISC uclass driver. The command provides listing all MISC devices
1228 as well as read and write functionalities via their drivers.
1234 MMC memory mapped support.
1238 config CMD_BKOPS_ENABLE
1239 bool "mmc bkops enable"
1242 Enable command for setting manual background operations handshake
1243 on a eMMC device. The feature is optionally available on eMMC devices
1244 conforming to standard >= 4.41.
1247 bool "Enable support for RPMB in the mmc command"
1248 depends on SUPPORT_EMMC_RPMB
1250 Enable the commands for reading, writing and programming the
1251 key for the Replay Protection Memory Block partition in eMMC.
1253 config CMD_MMC_SWRITE
1255 depends on MMC_WRITE
1258 Enable support for the "mmc swrite" command to write Android sparse
1267 Enable storage cloning over block devices, useful for
1268 initial flashing by external block device without network
1271 config CMD_OPTEE_RPMB
1272 bool "Enable read/write support on RPMB via OPTEE"
1273 depends on SUPPORT_EMMC_RPMB && OPTEE
1275 Enable the commands for reading, writing persistent named values
1276 in the Replay Protection Memory Block partition in eMMC by
1277 using Persistent Objects in OPTEE
1282 select MTD_PARTITIONS
1284 MTD commands support.
1288 depends on MULTIPLEXER
1290 List, select, and deselect mux controllers on the fly.
1294 default y if NAND_SUNXI
1295 depends on MTD_RAW_NAND
1300 config CMD_NAND_TRIMFFS
1301 bool "nand write.trimffs"
1302 default y if ARCH_SUNXI
1304 Allows one to skip empty pages when flashing something on a NAND.
1306 config CMD_NAND_LOCK_UNLOCK
1307 bool "nand lock/unlock"
1309 NAND locking support.
1311 config CMD_NAND_TORTURE
1314 NAND torture support.
1323 NVM Express device support
1326 bool "onenand - access to onenand device"
1329 OneNAND is a brand of NAND ('Not AND' gate) flash which provides
1330 various useful features. This command allows reading, writing,
1331 and erasing blocks. It allso provides a way to show and change
1332 bad blocks, and test the device.
1334 config USE_ONENAND_BOARD_INIT
1335 bool "Call onenand_board_init() in the onenand command"
1336 depends on CMD_ONENAND
1341 Enable the 'osd' command which allows to query information from and
1342 write text data to a on-screen display (OSD) device; a virtual device
1343 associated with a display capable of displaying a text overlay on the
1344 display it's associated with..
1348 depends on PARTITIONS
1349 select PARTITION_UUIDS
1351 Read and display information about the partition table on
1355 bool "pci - Access PCI devices"
1357 Provide access to PCI (Peripheral Interconnect Bus), a type of bus
1358 used on some devices to allow the CPU to communicate with its
1359 peripherals. Sub-commands allow bus enumeration, displaying and
1360 changing configuration space and a few other features.
1363 bool "pinmux - show pins muxing"
1365 default y if PINCTRL
1367 Parse all available pin-controllers and show pins muxing. This
1368 is useful for debug purpoer to check the pin muxing and to know if
1369 a pin is configured as a GPIO or as an alternate function.
1374 Poweroff/Shutdown the system
1377 bool "read - Read binary data from a partition"
1379 Provides low-level access to the data in a partition.
1381 config CMD_REMOTEPROC
1383 depends on REMOTEPROC
1385 Support for Remote Processor control
1388 bool "sata - Access SATA subsystem"
1391 SATA (Serial Advanced Technology Attachment) is a serial bus
1392 standard for connecting to hard drives and other storage devices.
1393 This command provides information about attached devices and allows
1394 reading, writing and other operations.
1396 SATA replaces PATA (originally just ATA), which stands for Parallel AT
1397 Attachment, where AT refers to an IBM AT (Advanced Technology)
1398 computer released in 1984.
1401 bool "saves - Save a file over serial in S-Record format"
1403 Provides a way to save a binary file using the Motorola S-Record
1404 format over the serial line.
1407 bool "scsi - Access to SCSI devices"
1410 This provides a 'scsi' command which provides access to SCSI (Small
1411 Computer System Interface) devices. The command provides a way to
1412 scan the bus, reset the bus, read and write data and get information
1416 bool "sdram - Print SDRAM configuration information"
1418 Provides information about attached SDRAM. This assumed that the
1419 SDRAM has an EEPROM with information that can be read using the
1420 I2C bus. This is only available on some boards.
1424 depends on DM_SPI_FLASH || SPI_FLASH
1425 default y if DM_SPI_FLASH
1430 bool "sf test - Allow testing of SPI flash"
1433 Provides a way to test that SPI flash is working correctly. The
1434 test is destructive, in that an area of SPI flash must be provided
1435 for the test to use. Performance information is also provided,
1436 measuring the performance of reading, writing and erasing in
1437 Mbps (Million Bits Per Second). This value should approximately
1438 equal the SPI bus speed for a single-bit-wide SPI bus, assuming
1439 everything is working properly.
1442 bool "sspi - Command to access spi device"
1445 SPI utility command.
1447 config DEFAULT_SPI_BUS
1448 int "default spi bus used by sspi command"
1452 config DEFAULT_SPI_MODE
1453 hex "default spi mode used by sspi command (see include/spi.h)"
1458 bool "tsi148 - Command to access tsi148 device"
1460 This provides various sub-commands to initialise and configure the
1461 Turndra tsi148 device. See the command help for full details.
1464 bool "Enable UFS - Universal Flash Subsystem commands"
1467 "This provides commands to initialise and configure universal flash
1471 bool "universe - Command to set up the Turndra Universe controller"
1473 This allows setting up the VMEbus provided by this controller.
1474 See the command help for full details.
1484 select USB_FUNCTION_SDP
1486 Enables the command "sdp" which is used to have U-Boot emulating the
1487 Serial Download Protocol (SDP) via USB.
1491 depends on USB_FUNCTION_ROCKUSB
1493 Rockusb protocol is widely used by Rockchip SoC based devices. It can
1494 read/write info, image to/from devices. This enable rockusb command
1495 support to communication with rockusb device. for more detail about
1496 this command, please read doc/README.rockusb.
1498 config CMD_USB_MASS_STORAGE
1499 bool "UMS usb mass storage"
1500 depends on USB_GADGET_DOWNLOAD
1501 select USB_FUNCTION_MASS_STORAGE
1502 depends on BLK && USB_GADGET
1504 Enables the command "ums" and the USB mass storage support to the
1505 export a block device: U-Boot, the USB device, acts as a simple
1506 external hard drive plugged on the host USB port.
1509 bool "Xen para-virtualized block device"
1513 Xen para-virtualized block device support
1520 VirtIO block device support
1526 This provides commands to control the watchdog timer devices.
1532 Enable the command "axi" for accessing AXI (Advanced eXtensible
1533 Interface) busses, a on-chip interconnect specification for managing
1534 functional blocks in SoC designs, which is also often used in designs
1535 involving FPGAs (e.g. communication with IP cores in Xilinx FPGAs).
1539 menu "Shell scripting commands"
1544 Print file to standard output
1550 Echo args to console
1556 Return true/false on integer compare.
1562 Run script from memory
1568 Evaluate boolean and math expressions and store the result in an env
1570 Also supports loading the value at a memory location into a variable.
1571 If CONFIG_REGEX is enabled, setexpr also supports a gsub function.
1573 config CMD_SETEXPR_FMT
1575 depends on CMD_SETEXPR
1577 Evaluate format string expression and store result in an environment
1582 menu "Android support commands"
1584 config CMD_AB_SELECT
1586 depends on ANDROID_AB
1588 On Android devices with more than one boot slot (multiple copies of
1589 the kernel and system images) this provides a command to select which
1590 slot should be used to boot from and register the boot attempt. This
1591 is used by the new A/B update model where one slot is updated in the
1592 background while running from the other slot.
1599 bool "Network commands"
1609 bootp - boot image via network using BOOTP/TFTP protocol
1613 depends on CMD_BOOTP
1615 Boot image via network using DHCP/TFTP protocol
1617 config BOOTP_MAY_FAIL
1618 bool "Allow for the BOOTP/DHCP server to not be found"
1619 depends on CMD_BOOTP
1621 If the DHCP server is not found after the configured retry count, the
1622 call will fail instead of starting over. This can be used to fail
1623 over to Link-local IP address configuration if the DHCP server is not
1626 config BOOTP_BOOTPATH
1627 bool "Request & store 'rootpath' from BOOTP/DHCP server"
1629 depends on CMD_BOOTP
1631 Even though the config is called BOOTP_BOOTPATH, it stores the
1632 path in the variable 'rootpath'.
1634 config BOOTP_VENDOREX
1635 bool "Support vendor extensions from BOOTP/DHCP server"
1636 depends on CMD_BOOTP
1638 config BOOTP_BOOTFILESIZE
1639 bool "Request & store 'bootfilesize' from BOOTP/DHCP server"
1640 depends on CMD_BOOTP
1643 bool "Request & store 'dnsip' from BOOTP/DHCP server"
1645 depends on CMD_BOOTP
1647 The primary DNS server is stored as 'dnsip'. If two servers are
1648 returned, you must set BOOTP_DNS2 to store that second server IP
1652 bool "Store 'dnsip2' from BOOTP/DHCP server"
1653 depends on BOOTP_DNS
1655 If a DHCP client requests the DNS server IP from a DHCP server,
1656 it is possible that more than one DNS serverip is offered to the
1657 client. If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS
1658 server IP will be stored in the additional environment
1659 variable "dnsip2". The first DNS serverip is always
1660 stored in the variable "dnsip", when BOOTP_DNS is defined.
1662 config BOOTP_GATEWAY
1663 bool "Request & store 'gatewayip' from BOOTP/DHCP server"
1665 depends on CMD_BOOTP
1667 config BOOTP_HOSTNAME
1668 bool "Request & store 'hostname' from BOOTP/DHCP server"
1670 depends on CMD_BOOTP
1672 The name may or may not be qualified with the local domain name.
1674 config BOOTP_PREFER_SERVERIP
1675 bool "serverip variable takes precedent over DHCP server IP."
1676 depends on CMD_BOOTP
1678 By default a BOOTP/DHCP reply will overwrite the 'serverip' variable.
1680 With this option enabled, the 'serverip' variable in the environment
1681 takes precedence over DHCP server IP and will only be set by the DHCP
1682 server if not already set in the environment.
1684 config BOOTP_SUBNETMASK
1685 bool "Request & store 'netmask' from BOOTP/DHCP server"
1687 depends on CMD_BOOTP
1689 config BOOTP_NISDOMAIN
1690 bool "Request & store 'nisdomain' from BOOTP/DHCP server"
1691 depends on CMD_BOOTP
1693 config BOOTP_NTPSERVER
1694 bool "Request & store 'ntpserverip' from BOOTP/DHCP server"
1695 depends on CMD_BOOTP
1697 config BOOTP_TIMEOFFSET
1698 bool "Request & store 'timeoffset' from BOOTP/DHCP server"
1699 depends on CMD_BOOTP && CMD_SNTP
1704 Selecting this will allow capturing all Ethernet packets and store
1705 them in physical memory in a PCAP formated file,
1706 later to be analyzed by PCAP reader application (IE. WireShark).
1709 bool "Send PXE client arch to BOOTP/DHCP server"
1711 depends on CMD_BOOTP && CMD_PXE
1713 Supported for ARM, ARM64, and x86 for now.
1715 config BOOTP_PXE_CLIENTARCH
1717 depends on BOOTP_PXE
1718 default 0x16 if ARM64
1722 config BOOTP_VCI_STRING
1724 depends on CMD_BOOTP
1725 default "U-Boot.armv7" if CPU_V7A || CPU_V7M || CPU_V7R
1726 default "U-Boot.armv8" if ARM64
1727 default "U-Boot.arm" if ARM
1734 tftpboot - load file via network using TFTP protocol
1738 depends on CMD_TFTPBOOT
1740 TFTP put command, for uploading files to a server
1744 depends on CMD_TFTPBOOT
1746 Act as a TFTP server and boot the first received file
1748 config NET_TFTP_VARS
1749 bool "Control TFTP timeout and count through environment"
1750 depends on CMD_TFTPBOOT
1753 If set, allows controlling the TFTP timeout through the
1754 environment variable tftptimeout, and the TFTP maximum
1755 timeout count through the variable tftptimeoutcountmax.
1756 If unset, timeout and maximum are hard-defined as 1 second
1757 and 10 timouts per TFTP transfer.
1762 Boot image via network using RARP/TFTP protocol
1768 Boot image via network using NFS protocol.
1771 int "Timeout in milliseconds for NFS mounts"
1775 Timeout in milliseconds used in NFS protocol. If you encounter
1776 "ERROR: Cannot umount" in nfs command, try longer timeout such as
1779 config SYS_DISABLE_AUTOLOAD
1780 bool "Disable automatically loading files over the network"
1781 depends on CMD_BOOTP || CMD_DHCP || CMD_NFS || CMD_RARP
1783 Typically, commands such as "dhcp" will attempt to automatically
1784 load a file from the network, once the initial network configuration
1785 is complete. Enable this option to disable this behavior and instead
1786 require files to be loaded over the network by subsequent commands.
1792 If set, allows 802.3(clause 22) MII Management functions interface access
1793 The management interface specified in Clause 22 provides
1794 a simple, two signal, serial interface to connect a
1795 Station Management entity and a managed PHY for providing access
1796 to management parameters and services.
1797 The interface is referred to as the MII management interface.
1800 bool "Call mii_init() in the mii command"
1801 depends on CMD_MII && (MPC8XX_FEC || FSLDMAFE || MCFFEC)
1807 If set, allows Enable 802.3(clause 45) MDIO interface registers access
1808 The MDIO interface is orthogonal to the MII interface and extends
1809 it by adding access to more registers through indirect addressing.
1814 Send ICMP ECHO_REQUEST to network host
1819 Perform CDP network configuration
1825 Synchronize RTC via network
1830 Lookup the IP of a hostname
1832 config CMD_LINK_LOCAL
1836 Acquire a network IP address using the link-local protocol
1843 Allow control of L2 Ethernet switch commands. These are supported
1844 by the vsc9953 Ethernet driver at present. Sub-commands allow
1845 operations such as enabling / disabling a port and
1846 viewing/maintaining the filtering database (FDB)
1852 Boot image via network using PXE protocol
1857 Wait for wake-on-lan Magic Packet
1861 menu "Misc commands"
1864 bool "Enable 'bmp' command"
1865 depends on LCD || DM_VIDEO || VIDEO
1867 This provides a way to obtain information about a BMP-format image
1868 and to display it. BMP (which presumably stands for BitMaP) is a
1869 file format defined by Microsoft which supports images of various
1870 depths, formats and compression methods. Headers on the file
1871 determine the formats used. This command can be used by first loading
1872 the image into RAM, then using this command to look at it or display
1875 config CMD_BOOTCOUNT
1877 depends on BOOTCOUNT_LIMIT
1879 Enable the bootcount command, which allows interrogation and
1880 reset of the bootcounter.
1883 bool "Enable board-specific commands"
1885 (deprecated: instead, please define a Kconfig option for each command)
1887 Some boards have board-specific commands which are only enabled
1888 during developemnt and need to be turned off for production. This
1889 option provides a way to control this. The commands that are enabled
1890 vary depending on the board.
1892 config CMD_BLOCK_CACHE
1893 bool "blkcache - control and stats for block cache"
1894 depends on BLOCK_CACHE
1895 default y if BLOCK_CACHE
1897 Enable the blkcache command, which can be used to control the
1898 operation of the cache functions.
1899 This is most useful when fine-tuning the operation of the cache
1900 during development, but also allows the cache to be disabled when
1901 it might hurt performance (e.g. when using the ums command).
1908 Enable the 'button' command which allows to get the status of
1909 buttons supported by the board. The buttonss can be listed with
1910 'button list' and state can be known with 'button <label>'.
1911 Any button drivers can be controlled with this command, e.g.
1915 bool "icache or dcache"
1917 Enable the "icache" and "dcache" commands
1919 config CMD_CONITRACE
1920 bool "conitrace - trace console input codes"
1922 Enable the 'conitrace' command which displays the codes received
1923 from the console input as hexadecimal numbers.
1926 bool "Enable clear screen command 'cls'"
1929 Enable the 'cls' command which clears the screen contents
1930 on video frame buffer.
1933 bool "efidebug - display/configure UEFI environment"
1934 depends on EFI_LOADER
1935 select EFI_DEVICE_PATH_TO_TEXT
1937 Enable the 'efidebug' command which provides a subset of UEFI
1938 shell utility with simplified functionality. It will be useful
1939 particularly for managing boot parameters as well as examining
1940 various EFI status for debugging.
1942 config CMD_EFICONFIG
1943 bool "eficonfig - provide menu-driven uefi variables maintenance interface"
1944 depends on CMD_BOOTEFI_BOOTMGR
1946 Enable the 'eficonfig' command which provides the menu-driven UEFI
1947 variable maintenance interface.
1949 config CMD_EXCEPTION
1950 bool "exception - raise exception"
1951 depends on ARM || RISCV || SANDBOX || X86
1953 Enable the 'exception' command which allows to raise an exception.
1960 Enable the 'led' command which allows for control of LEDs supported
1961 by the board. The LEDs can be listed with 'led list' and controlled
1962 with led on/off/togle/blink. Any LED drivers can be controlled with
1963 this command, e.g. led_gpio.
1970 Enable the 'date' command for getting/setting the time/date in RTC
1977 Enable the 'rtc' command for low-level access to RTC devices.
1982 Run commands and summarize execution time.
1985 bool "gettime - read elapsed time"
1987 Enable the 'gettime' command which reads the elapsed time since
1988 U-Boot started running. This shows the time in seconds and
1989 milliseconds. See also the 'bootstage' command which provides more
1990 flexibility for boot timing.
1993 bool "pause command"
1995 Delay execution waiting for any user input.
1996 Useful to allow the user to read a failure log.
2001 default y if SANDBOX
2004 Print bytes from the hardware random number generator.
2006 config CMD_KASLRSEED
2010 Set the kaslr-seed in the chosen node with entropy provided by a
2011 hardware random number generator.
2017 Delay execution for some time
2020 bool "support for multiprocessor commands"
2024 This enables commands to bringup different processors
2025 in multiprocessor cases.
2030 Access the system timer.
2036 This provides basic access to the U-Boot's sound support. The main
2037 feature is to play a beep.
2039 sound init - set up sound system
2040 sound play - play a sound
2046 Boot image via local extlinux.conf file
2052 This provides access to the QEMU firmware interface. The main
2053 feature is to allow easy loading of files passed to qemu-system
2054 via -kernel / -initrd
2059 This provides access to Linux PStore with Rammoops backend. The main
2060 feature is to allow to display or save PStore records.
2062 See doc/pstore.rst for more information.
2066 config CMD_PSTORE_MEM_ADDR
2067 hex "Memory Address"
2068 depends on CMD_PSTORE
2070 Base addr used for PStore ramoops memory, should be identical to
2071 ramoops.mem_address parameter used by kernel
2073 config CMD_PSTORE_MEM_SIZE
2075 depends on CMD_PSTORE
2078 Size of PStore ramoops memory, should be identical to ramoops.mem_size
2079 parameter used by kernel, a power of 2 and larger than the sum of the
2082 config CMD_PSTORE_RECORD_SIZE
2083 hex "Dump record size"
2084 depends on CMD_PSTORE
2087 Size of each dump done on oops/panic, should be identical to
2088 ramoops.record_size parameter used by kernel and a power of 2
2091 config CMD_PSTORE_CONSOLE_SIZE
2092 hex "Kernel console log size"
2093 depends on CMD_PSTORE
2096 Size of kernel console log, should be identical to
2097 ramoops.console_size parameter used by kernel and a power of 2
2100 config CMD_PSTORE_FTRACE_SIZE
2101 hex "FTrace log size"
2102 depends on CMD_PSTORE
2105 Size of ftrace log, should be identical to ramoops.ftrace_size
2106 parameter used by kernel and a power of 2
2108 config CMD_PSTORE_PMSG_SIZE
2109 hex "User space message log size"
2110 depends on CMD_PSTORE
2113 Size of user space message log, should be identical to
2114 ramoops.pmsg_size parameter used by kernel and a power of 2
2116 config CMD_PSTORE_ECC_SIZE
2118 depends on CMD_PSTORE
2121 if non-zero, the option enables ECC support and specifies ECC buffer
2122 size in bytes (1 is a special value, means 16 bytes ECC), should be
2123 identical to ramoops.ramoops_ecc parameter used by kernel
2127 source "cmd/mvebu/Kconfig"
2130 bool "terminal - provides a way to attach a serial terminal"
2132 Provides a 'cu'-like serial terminal command. This can be used to
2133 access other serial ports from the system console. The terminal
2134 is very simple with no special processing of characters. As with
2135 cu, you can press ~. (tilde followed by period) to exit.
2138 bool "uuid, guid - generation of unique IDs"
2141 This enables two commands:
2143 uuid - generate random Universally Unique Identifier
2144 guid - generate Globally Unique Identifier based on random UUID
2146 The two commands are very similar except for the endianness of the
2151 source "cmd/ti/Kconfig"
2153 config CMD_BOOTSTAGE
2154 bool "Enable the 'bootstage' command"
2155 depends on BOOTSTAGE
2157 Add a 'bootstage' command which supports printing a report
2158 and un/stashing of bootstage data.
2160 menu "Power commands"
2162 bool "Enable Driver Model PMIC command"
2165 This is the pmic command, based on a driver model pmic's API.
2166 Command features are unchanged:
2167 - list - list pmic devices
2168 - pmic dev <id> - show or [set] operating pmic device (NEW)
2169 - pmic dump - dump registers
2170 - pmic read address - read byte of register at address
2171 - pmic write address - write byte to register at address
2172 The only one change for this command is 'dev' subcommand.
2174 config CMD_REGULATOR
2175 bool "Enable Driver Model REGULATOR command"
2176 depends on DM_REGULATOR
2178 This command is based on driver model regulator's API.
2179 User interface features:
2180 - list - list regulator devices
2181 - regulator dev <id> - show or [set] operating regulator device
2182 - regulator info - print constraints info
2183 - regulator status - print operating status
2184 - regulator value <val] <-f> - print/[set] voltage value [uV]
2185 - regulator current <val> - print/[set] current value [uA]
2186 - regulator mode <id> - print/[set] operating mode id
2187 - regulator enable - enable the regulator output
2188 - regulator disable - disable the regulator output
2190 The '-f' (force) option can be used for set the value which exceeds
2191 the limits, which are found in device-tree and are kept in regulator's
2192 uclass plat structure.
2196 menu "Security commands"
2198 bool "Enable the 'aes' command"
2201 This provides a means to encrypt and decrypt data using the AES
2202 (Advanced Encryption Standard). This algorithm uses a symetric key
2203 and is widely used as a streaming cipher. Different key lengths are
2204 supported by the algorithm but this command only supports 128 bits
2208 bool "Enable the 'blob' command"
2209 depends on !MX6ULL && !MX6SLL && !MX6SL
2210 select IMX_HAB if ARCH_MX6 || ARCH_MX7 || ARCH_MX7ULP || ARCH_IMX8M
2212 This is used with the Freescale secure boot mechanism.
2214 Freescale's SEC block has built-in Blob Protocol which provides
2215 a method for protecting user-defined data across system power
2216 cycles. SEC block protects data in a data structure called a Blob,
2217 which provides both confidentiality and integrity protection.
2219 Encapsulating data as a blob
2220 Each time that the Blob Protocol is used to protect data, a
2221 different randomly generated key is used to encrypt the data.
2222 This random key is itself encrypted using a key which is derived
2223 from SoC's non-volatile secret key and a 16 bit Key identifier.
2224 The resulting encrypted key along with encrypted data is called a
2225 blob. The non-volatile secure key is available for use only during
2228 During decapsulation, the reverse process is performed to get back
2232 blob enc - encapsulating data as a cryptgraphic blob
2233 blob dec - decapsulating cryptgraphic blob to get the data
2237 blob enc src dst len km
2239 Encapsulate and create blob of data $len bytes long
2240 at address $src and store the result at address $dst.
2241 $km is the 16 byte key modifier is also required for
2242 generation/use as key for cryptographic operation. Key
2243 modifier should be 16 byte long.
2245 blob dec src dst len km
2247 Decapsulate the blob of data at address $src and
2248 store result of $len byte at addr $dst.
2249 $km is the 16 byte key modifier is also required for
2250 generation/use as key for cryptographic operation. Key
2251 modifier should be 16 byte long.
2254 bool "Support 'hash' command"
2257 This provides a way to hash data in memory using various supported
2258 algorithms (such as SHA1, MD5, CRC32). The computed digest can be
2259 saved to memory or to an environment variable. It is also possible
2260 to verify a hash against data in memory.
2263 bool "Support the 'hvc' command"
2264 depends on ARM_SMCCC
2266 Allows issuing Hypervisor Calls (HVCs). Mostly useful for
2267 development and testing.
2270 bool "Support the 'smc' command"
2271 depends on ARM_SMCCC
2273 Allows issuing Secure Monitor Calls (SMCs). Mostly useful for
2274 development and testing.
2280 Add -v option to verify data against a hash.
2283 bool "scp03 - SCP03 enable and rotate/provision operations"
2286 This command provides access to a Trusted Application
2287 running in a TEE to request Secure Channel Protocol 03
2288 (SCP03) enablement and/or rotation of its SCP03 keys.
2297 bool "Enable the 'tpm' command"
2298 depends on TPM_V1 || TPM_V2
2299 select CMD_TPM_V1 if TPM_V1
2300 select CMD_TPM_V2 if TPM_V2
2302 This provides a means to talk to a TPM from the command line. A wide
2303 range of commands if provided - see 'tpm help' for details. The
2304 command requires a suitable TPM on your board and the correct driver
2310 bool "Enable the 'tpm test' command"
2313 This provides a a series of tests to confirm that the TPMv1.x is
2314 working correctly. The tests cover initialisation, non-volatile RAM,
2315 extend, global lock and checking that timing is within expectations.
2316 The tests pass correctly on Infineon TPMs but may need to be adjusted
2323 menu "Firmware commands"
2325 bool "Enable crosec command"
2329 Enable command-line access to the Chrome OS EC (Embedded
2330 Controller). This provides the 'crosec' command which has
2331 a number of sub-commands for performing EC tasks such as
2332 updating its flash, accessing a small saved context area
2333 and talking to the I2C bus behind the EC (if there is one).
2336 menu "Filesystem commands"
2338 bool "Enable the 'btrsubvol' command"
2341 This enables the 'btrsubvol' command to list subvolumes
2342 of a BTRFS filesystem. There are no special commands for
2343 listing BTRFS directories or loading BTRFS files - this
2344 can be done by the generic 'fs' commands (see CMD_FS_GENERIC)
2345 when BTRFS is enabled (see FS_BTRFS).
2348 bool "Enable the 'cbfs' command"
2351 Define this to enable support for reading from a Coreboot
2352 filesystem. This is a ROM-based filesystem used for accessing files
2353 on systems that use coreboot as the first boot-loader and then load
2354 U-Boot to actually boot the Operating System. Available commands are
2355 cbfsinit, cbfsinfo, cbfsls and cbfsload.
2358 bool "Enable the 'cramfs' command"
2359 depends on FS_CRAMFS
2361 This provides commands for dealing with CRAMFS (Compressed ROM
2362 filesystem). CRAMFS is useful when space is tight since files are
2363 compressed. Two commands are provided:
2365 cramfsls - lists files in a cramfs image
2366 cramfsload - loads a file from a cramfs image
2369 bool "EROFS command support"
2372 Support for the EROFS fs
2375 bool "ext2 command support"
2378 Enables EXT2 FS command
2381 bool "ext4 command support"
2384 Enables EXT4 FS command
2386 config CMD_EXT4_WRITE
2388 bool "ext4 write command support"
2391 Enables EXT4 FS write command
2394 bool "FAT command support"
2397 Support for the FAT fs
2400 bool "SquashFS command support"
2403 Enables SquashFS filesystem commands (e.g. load, ls).
2405 config CMD_FS_GENERIC
2406 bool "filesystem commands"
2408 Enables filesystem commands (e.g. load, ls) that work for multiple
2412 bool "fsuuid command"
2414 Enables fsuuid command for filesystem UUID.
2417 bool "jffs2 command"
2420 Enables commands to support the JFFS2 (Journalling Flash File System
2421 version 2) filesystem. This enables fsload, ls and fsinfo which
2422 provide the ability to load files, list directories and obtain
2423 filesystem information.
2426 string "Default device for JFFS2"
2427 depends on CMD_JFFS2
2430 The default device to use with the jffs2 command.
2432 config JFFS2_PART_OFFSET
2433 hex "Default offset within flash to locate the JFFS2 image"
2434 depends on CMD_JFFS2
2437 The default offset within flash to locate the JFFS2 image.
2439 config JFFS2_PART_SIZE
2440 hex "Default size of JFFS2 partition"
2441 depends on CMD_JFFS2
2444 The default size of the JFFS2 partition
2447 bool "MTD partition support"
2450 MTD partitioning tool support.
2451 It is strongly encouraged to avoid using this command
2452 anymore along with 'sf', 'nand', 'onenand'. One can still
2453 declare the partitions in the mtdparts environment variable
2454 but better use the MTD stack and the 'mtd' command instead.
2456 config CMD_MTDPARTS_SPREAD
2457 bool "Padd partition size to take account of bad blocks"
2458 depends on CMD_MTDPARTS
2460 This enables the 'spread' sub-command of the mtdparts command.
2461 This command will modify the existing mtdparts variable by increasing
2462 the size of the partitions such that 1) each partition's net size is
2463 at least as large as the size specified in the mtdparts variable and
2464 2) each partition starts on a good block.
2466 config CMD_MTDPARTS_SHOW_NET_SIZES
2467 bool "Show net size (w/o bad blocks) of partitions"
2468 depends on CMD_MTDPARTS
2470 Adds two columns to the printed partition table showing the
2471 effective usable size of a partition, if bad blocks are taken
2474 config MTDIDS_DEFAULT
2475 string "Default MTD IDs"
2476 depends on MTD || SPI_FLASH
2478 Defines a default MTD IDs list for use with MTD partitions in the
2479 Linux MTD command line partitions format.
2481 config MTDPARTS_DEFAULT
2482 string "Default MTD partition scheme"
2483 depends on MTD || SPI_FLASH
2485 Defines a default MTD partitioning scheme in the Linux MTD command
2486 line partitions format
2489 bool "reiser - Access to reiserfs filesystems"
2491 This provides two commands which operate on a resierfs filesystem,
2492 commonly used some years ago:
2494 reiserls - list files
2495 reiserload - load a file
2498 bool "yaffs2 - Access of YAFFS2 filesystem"
2502 This provides commands for accessing a YAFFS2 filesystem. Yet
2503 Another Flash Filesystem 2 is a filesystem designed specifically
2504 for NAND flash. It incorporates bad-block management and ensures
2505 that device writes are sequential regardless of filesystem
2509 bool "zfs - Access of ZFS filesystem"
2511 This provides commands to accessing a ZFS filesystem, commonly used
2512 on Solaris systems. Two sub-commands are provided:
2514 zfsls - list files in a directory
2515 zfsload - load a file
2517 See doc/README.zfs for more details.
2521 menu "Debug commands"
2523 config CMD_CBSYSINFO
2526 default y if SYS_COREBOOT
2528 This provides information about the coreboot sysinfo table stored in
2529 memory by coreboot before jumping to U-Boot. It can be useful for
2530 debugging the beaaviour of coreboot or U-Boot.
2533 bool "cyclic - Show information about cyclic functions"
2537 This enables the 'cyclic' command which provides information about
2538 cyclic execution functions. This infrastructure allows registering
2539 functions to be executed cyclically, e.g. every 100ms. These commands
2542 cyclic list - list cyclic functions
2543 cyclic cyclic demo <cycletime_ms> <delay_us> - register cyclic
2546 See doc/develop/cyclic.rst for more details.
2549 bool "diag - Board diagnostics"
2551 This command provides access to board diagnostic tests. These are
2552 called Power-on Self Tests (POST). The command allows listing of
2553 available tests and running either all the tests, or specific tests
2557 bool "event - Show information about events"
2558 default y if EVENT_DEBUG
2560 This enables the 'event' command which provides information about
2561 events and event-handler routines. This can help to device event
2565 bool "irq - Show information about interrupts"
2566 depends on !ARM && !MIPS && !RISCV && !SH
2568 This enables two commands:
2570 interrupts - enable or disable interrupts
2571 irqinfo - print device-specific interrupt information
2574 bool "kgdb - Allow debugging of U-Boot with gdb"
2577 This enables a 'kgdb' command which allows gdb to connect to U-Boot
2578 over a serial link for debugging purposes. This allows
2579 single-stepping, inspecting variables, etc. This is supported only
2580 on PowerPC at present.
2583 bool "log - Generation, control and access to logging"
2587 This provides access to logging features. It allows the output of
2588 log data to be controlled to a limited extent (setting up the default
2589 maximum log level for emitting of records). It also provides access
2590 to a command used for testing the log system.
2593 bool "trace - Support tracing of function calls and timing"
2597 Enables a command to control using of function tracing within
2598 U-Boot. This allows recording of call traces including timing
2599 information. The command can write data to memory for exporting
2600 for analysis (e.g. using bootchart). See doc/README.trace for full
2604 bool "avb - Android Verified Boot 2.0 operations"
2605 depends on AVB_VERIFY
2607 Enables a "avb" command to perform verification of partitions using
2608 Android Verified Boot 2.0 functionality. It includes such subcommands:
2609 avb init - initialize avb2 subsystem
2610 avb read_rb - read rollback index
2611 avb write_rb - write rollback index
2612 avb is_unlocked - check device lock state
2613 avb get_uuid - read and print uuid of a partition
2614 avb read_part - read data from partition
2615 avb read_part_hex - read data from partition and output to stdout
2616 avb write_part - write data to partition
2617 avb verify - run full verification chain
2619 config CMD_STACKPROTECTOR_TEST
2620 bool "Test command for stack protector"
2621 depends on STACKPROTECTOR
2623 Enable stackprot_test command
2624 The stackprot_test command will force a stack overrun to test
2625 the stack smashing detection mechanisms.
2630 tristate "Enable UBI - Unsorted block images commands"
2633 UBI is a software layer above MTD layer which admits use of LVM-like
2634 logical volumes on top of MTD devices, hides some complexities of
2635 flash chips like wear and bad blocks and provides some other useful
2636 capabilities. Please, consult the MTD web site for more details
2637 (www.linux-mtd.infradead.org). Activate this option if you want
2638 to use U-Boot UBI commands.
2639 It is also strongly encouraged to also enable CONFIG_MTD to get full
2642 config CMD_UBI_RENAME
2643 bool "Enable rename"
2646 Enable a "ubi" command to rename ubi volume:
2647 ubi rename <oldname> <newname>
2650 tristate "Enable UBIFS - Unsorted block images filesystem commands"
2652 default y if CMD_UBI
2656 UBIFS is a file system for flash devices which works on top of UBI.
2658 config MMC_SPEED_MODE_SET
2659 bool "set speed mode using mmc command"
2663 Enable setting speed mode using mmc rescan and mmc dev commands.
2664 The speed mode is provided as the last argument in these commands
2665 and is indicated using the index from enum bus_mode in
2666 include/mmc.h. A speed mode can be set only if it has already
2667 been enabled in the device tree.
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