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.
30 This string is displayed in the command line to the left of the
33 menu "Autoboot options"
39 This enables the autoboot. See doc/README.autoboot for detail.
42 bool "Stop autobooting via specific input key / string"
45 This option enables stopping (aborting) of the automatic
46 boot feature only by issuing a specific input key or
47 string. If not enabled, any input key will abort the
48 U-Boot automatic booting process and bring the device
49 to the U-Boot prompt for user input.
51 config AUTOBOOT_PROMPT
52 string "Autoboot stop prompt"
53 depends on AUTOBOOT_KEYED
54 default "Autoboot in %d seconds\\n"
56 This string is displayed before the boot delay selected by
57 CONFIG_BOOTDELAY starts. If it is not defined there is no
58 output indicating that autoboot is in progress.
60 Note that this define is used as the (only) argument to a
61 printf() call, so it may contain '%' format specifications,
62 provided that it also includes, sepearated by commas exactly
63 like in a printf statement, the required arguments. It is
64 the responsibility of the user to select only such arguments
65 that are valid in the given context.
67 config AUTOBOOT_ENCRYPTION
68 bool "Enable encryption in autoboot stopping"
69 depends on AUTOBOOT_KEYED
72 config AUTOBOOT_DELAY_STR
73 string "Delay autobooting via specific input key / string"
74 depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION
76 This option delays the automatic boot feature by issuing
77 a specific input key or string. If CONFIG_AUTOBOOT_DELAY_STR
78 or the environment variable "bootdelaykey" is specified
79 and this string is received from console input before
80 autoboot starts booting, U-Boot gives a command prompt. The
81 U-Boot prompt will time out if CONFIG_BOOT_RETRY_TIME is
82 used, otherwise it never times out.
84 config AUTOBOOT_STOP_STR
85 string "Stop autobooting via specific input key / string"
86 depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION
88 This option enables stopping (aborting) of the automatic
89 boot feature only by issuing a specific input key or
90 string. If CONFIG_AUTOBOOT_STOP_STR or the environment
91 variable "bootstopkey" is specified and this string is
92 received from console input before autoboot starts booting,
93 U-Boot gives a command prompt. The U-Boot prompt never
94 times out, even if CONFIG_BOOT_RETRY_TIME is used.
96 config AUTOBOOT_KEYED_CTRLC
97 bool "Enable Ctrl-C autoboot interruption"
98 depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION
101 This option allows for the boot sequence to be interrupted
102 by ctrl-c, in addition to the "bootdelaykey" and "bootstopkey".
103 Setting this variable provides an escape sequence from the
104 limited "password" strings.
106 config AUTOBOOT_STOP_STR_SHA256
107 string "Stop autobooting via SHA256 encrypted password"
108 depends on AUTOBOOT_KEYED && AUTOBOOT_ENCRYPTION
110 This option adds the feature to only stop the autobooting,
111 and therefore boot into the U-Boot prompt, when the input
112 string / password matches a values that is encypted via
113 a SHA256 hash and saved in the environment.
117 source "cmd/fastboot/Kconfig"
134 Print ".config" contents.
136 If this option is enabled, the ".config" file contents are embedded
137 in the U-Boot image and can be printed on the console by the "config"
138 command. This provides information of which options are enabled on
145 Print console devices and information.
150 Print information about available CPUs. This normally shows the
151 number of CPUs, type (e.g. manufacturer, architecture, product or
152 internal name) and clock frequency. Other information may be
153 available depending on the CPU driver.
159 Print GPL license text
175 Run the command stored in the environment "bootcmd", i.e.
176 "bootd" does the same thing as "run bootcmd".
182 Boot an application image from the memory.
187 Boot the Linux zImage
194 Boot an AArch64 Linux Kernel image from memory.
198 depends on EFI_LOADER
201 Boot an EFI image from memory.
203 config CMD_BOOTEFI_HELLO_COMPILE
204 bool "Compile a standard EFI hello world binary for testing"
205 depends on CMD_BOOTEFI && (ARM || X86)
208 This compiles a standard EFI hello world application with U-Boot so
209 that it can be used with the test/py testing framework. This is useful
210 for testing that EFI is working at a basic level, and for bringing
211 up EFI support on a new architecture.
213 No additional space will be required in the resulting U-Boot binary
214 when this option is enabled.
216 config CMD_BOOTEFI_HELLO
217 bool "Allow booting a standard EFI hello world for testing"
218 depends on CMD_BOOTEFI_HELLO_COMPILE
220 This adds a standard EFI hello world application to U-Boot so that
221 it can be used with the 'bootefi hello' command. This is useful
222 for testing that EFI is working at a basic level, and for bringing
223 up EFI support on a new architecture.
229 Add an ANSI terminal boot menu command.
232 bool "bootelf, bootvx"
235 Boot an ELF/vxWorks image from the memory.
238 bool "Flattened Device Tree utility commands"
242 Do FDT related setup before booting into the Operating System.
248 Start an application at a given address.
254 Run the command in the given environment variable.
260 Print header information for application image.
266 List all images found in flash
272 Extract a part of a multi-image.
277 Poweroff/Shutdown the system
280 bool "spl export - Export boot information for Falcon boot"
283 Falcon mode allows booting directly from SPL into an Operating
284 System such as Linux, thus skipping U-Boot proper. See
285 doc/README.falcon for full information about how to use this
288 config CMD_SPL_NAND_OFS
289 hex "Offset of OS command line args for Falcon-mode NAND boot"
293 This provides the offset of the command line arguments for Linux
294 when booting from NAND in Falcon mode. See doc/README.falcon
295 for full information about how to use this option (and also see
296 board/gateworks/gw_ventana/README for an example).
298 config CMD_SPL_WRITE_SIZE
299 hex "Size of argument area"
303 This provides the size of the command-line argument area in NAND
304 flash used by Falcon-mode boot. See the documentation until CMD_SPL
307 config CMD_THOR_DOWNLOAD
308 bool "thor - TIZEN 'thor' download"
310 Implements the 'thor' download protocol. This is a way of
311 downloading a software update over USB from an attached host.
312 There is no documentation about this within the U-Boot source code
313 but you should be able to find something on the interwebs.
316 bool "zboot - x86 boot command"
318 With x86 machines it is common to boot a bzImage file which
319 contains both a kernel and a setup.bin file. The latter includes
320 configuration information from the dark ages which x86 boards still
321 need to pick things out of.
323 Consider using FIT in preference to this since it supports directly
324 booting both 32- and 64-bit kernels, as well as secure boot.
325 Documentation is available in doc/uImage.FIT/x86-fit-boot.txt
329 menu "Environment commands"
332 bool "ask for env variable"
334 Ask for environment variable
352 Edit environment variable.
357 Allow for searching environment variables
363 Save all environment variables into the compiled-in persistent
366 config CMD_ENV_EXISTS
370 Check if a variable is defined in the environment for use in
373 config CMD_ENV_CALLBACK
374 bool "env callbacks - print callbacks and their associated variables"
376 Some environment variable have callbacks defined by
377 U_BOOT_ENV_CALLBACK. These are called when the variable changes.
378 For example changing "baudrate" adjust the serial baud rate. This
379 command lists the currently defined callbacks.
382 bool "env flags -print variables that have non-default flags"
384 Some environment variables have special flags that control their
385 behaviour. For example, serial# can only be written once and cannot
386 be deleted. This command shows the variables that have special
391 menu "Memory commands"
404 Add -v option to verify data against a crc32 checksum.
407 bool "eeprom - EEPROM subsystem"
409 (deprecated, needs conversion to driver model)
410 Provides commands to read and write EEPROM (Electrically Erasable
411 Programmable Read Only Memory) chips that are connected over an
414 config CMD_EEPROM_LAYOUT
415 bool "Enable layout-aware eeprom commands"
416 depends on CMD_EEPROM
418 (deprecated, needs conversion to driver model)
419 When enabled, additional eeprom sub-commands become available.
421 eeprom print - prints the contents of the eeprom in a human-readable
422 way (eeprom layout fields, and data formatted to be fit for human
425 eeprom update - allows user to update eeprom fields by specifying
426 the field name, and providing the new data in a human readable format
427 (same format as displayed by the eeprom print command).
429 Both commands can either auto detect the layout, or be told which
433 __weak int parse_layout_version(char *str)
434 - override to provide your own layout name parsing
435 __weak void __eeprom_layout_assign(struct eeprom_layout *layout,
437 - override to setup the layout metadata based on the version
438 __weak int eeprom_layout_detect(unsigned char *data)
439 - override to provide your own algorithm for detecting layout
442 - contains various printing and updating functions for common
443 types of eeprom fields. Can be used for defining
446 config EEPROM_LAYOUT_HELP_STRING
447 string "Tells user what layout names are supported"
448 depends on CMD_EEPROM_LAYOUT
449 default "<not defined>"
451 Help printed with the LAYOUT VERSIONS part of the 'eeprom'
457 Infinite write loop on address range
464 Compute MD5 checksum.
469 depends on CMD_MD5SUM
471 Add -v option to verify data against an MD5 checksum.
476 Display memory information.
479 bool "md, mm, nm, mw, cp, cmp, base, loop"
484 mm - memory modify (auto-incrementing address)
485 nm - memory modify (constant address)
486 mw - memory write (fill)
489 base - print or set address offset
490 loop - initialize loop on address range
495 Simple RAM read/write test.
500 mdc - memory display cyclic
501 mwc - memory write cyclic
507 Compute SHA1 checksum.
509 config SHA1SUM_VERIFY
511 depends on CMD_SHA1SUM
513 Add -v option to verify data against a SHA1 checksum.
516 bool "strings - display strings in memory"
518 This works similarly to the Unix 'strings' command except that it
519 works with a memory range. String of printable characters found
520 within the range are displayed. The minimum number of characters
521 for a sequence to be considered a string can be provided.
525 menu "Compression commands"
531 Support decompressing an LZMA (Lempel-Ziv-Markov chain algorithm)
537 Uncompress a zip-compressed memory region.
542 Compress a memory region with zlib deflate method.
546 menu "Device access commands"
549 #depends on FLASH_CFI_DRIVER
552 ARM Ltd reference designs flash partition access
555 bool "clk - Show clock frequencies"
558 Shows clock frequences by calling a sock_clk_dump() hook function.
559 This is depreated in favour of using the CLK uclass and accessing
560 clock values from associated drivers. However currently no command
564 bool "demo - Demonstration commands for driver model"
567 Provides a 'demo' command which can be used to play around with
568 driver model. To use this properly you will need to enable one or
569 both of the demo devices (DM_DEMO_SHAPE and DM_DEMO_SIMPLE).
570 Otherwise you will always get an empty list of devices. The demo
571 devices are defined in the sandbox device tree, so the easiest
572 option is to use sandbox and pass the -d point to sandbox's
577 select USB_FUNCTION_DFU
579 Enables the command "dfu" which is used to have U-Boot create a DFU
580 class device via USB. This command requires that the "dfu_alt_info"
581 environment variable be set and define the alt settings to expose to
585 bool "dm - Access to driver model information"
589 Provides access to driver model data structures and information,
590 such as a list of devices, list of uclasses and the state of each
591 device (e.g. activated). This is not required for operation, but
592 can be useful to see the state of driver model for debugging or
596 bool "fdcboot - Boot from floppy device"
598 The 'fdtboot' command allows booting an image from a floppy disk.
601 bool "flinfo, erase, protect"
605 flinfo - print FLASH memory information
607 protect - enable or disable FLASH write protection
615 config CMD_FPGA_LOADBP
616 bool "fpga loadbp - load partial bitstream (Xilinx only)"
619 Supports loading an FPGA device from a bitstream buffer containing
622 config CMD_FPGA_LOADFS
623 bool "fpga loadfs - load bitstream from FAT filesystem (Xilinx only)"
626 Supports loading an FPGA device from a FAT filesystem.
628 config CMD_FPGA_LOADMK
629 bool "fpga loadmk - load bitstream from image"
632 Supports loading an FPGA device from a image generated by mkimage.
634 config CMD_FPGA_LOADP
635 bool "fpga loadp - load partial bitstream"
638 Supports loading an FPGA device from a bitstream buffer containing
642 bool "fpgad - dump FPGA registers"
644 (legacy, needs conversion to driver model)
645 Provides a way to dump FPGA registers by calling the board-specific
646 fpga_get_reg() function. This functions similarly to the 'md'
650 bool "fuse - support for the fuse subssystem"
652 (deprecated - needs conversion to driver model)
653 This allows reading, sensing, programming or overriding fuses
654 which control the behaviour of the device. The command uses the
663 bool "GPT (GUID Partition Table) command"
664 select PARTITION_UUIDS
667 Enable the 'gpt' command to ready and write GPT style partition
670 config CMD_GPT_RENAME
671 bool "GPT partition renaming commands"
674 Enables the 'gpt' command to interchange names on two GPT
675 partitions via the 'gpt swap' command or to rename single
676 partitions via the 'rename' command.
679 bool "ide - Support for IDE drivers"
682 Provides an 'ide' command which allows accessing the IDE drive,
683 reseting the IDE interface, printing the partition table and
684 geting device info. It also enables the 'diskboot' command which
685 permits booting from an IDE drive.
688 bool "io - Support for performing I/O accesses"
690 Provides an 'iod' command to display I/O space and an 'iow' command
691 to write values to the I/O space. This can be useful for manually
692 checking the state of devices during boot when debugging device
696 bool "iotrace - Support for tracing I/O activity"
698 Provides an 'iotrace' command which supports recording I/O reads and
699 writes in a trace buffer in memory . It also maintains a checksum
700 of the trace records (even if space is exhausted) so that the
701 sequence of I/O accesses can be verified.
703 When debugging drivers it is useful to see what I/O accesses were
704 done and in what order.
706 Even if the individual accesses are of little interest it can be
707 useful to verify that the access pattern is consistent each time
708 an operation is performed. In this case a checksum can be used to
709 characterise the operation of a driver. The checksum can be compared
710 across different runs of the operation to verify that the driver is
713 In particular, when performing major refactoring of the driver, where
714 the access pattern should not change, the checksum provides assurance
715 that the refactoring work has not broken the driver.
717 This works by sneaking into the io.h heder for an architecture and
718 redirecting I/O accesses through iotrace's tracing mechanism.
720 For now no commands are provided to examine the trace buffer. The
721 format is fairly simple, so 'md' is a reasonable substitute.
723 Note: The checksum feature is only useful for I/O regions where the
724 contents do not change outside of software control. Where this is not
725 suitable you can fall back to manually comparing the addresses. It
726 might be useful to enhance tracing to only checksum the accesses and
727 not the data read/written.
738 Load a binary file over serial line.
744 Load an S-Record file over serial line
749 MMC memory mapped support.
753 default y if NAND_SUNXI
758 config CMD_NAND_TRIMFFS
759 bool "nand write.trimffs"
760 default y if ARCH_SUNXI
762 Allows one to skip empty pages when flashing something on a NAND.
764 config CMD_NAND_LOCK_UNLOCK
765 bool "nand lock/unlock"
767 NAND locking support.
769 config CMD_NAND_TORTURE
772 NAND torture support.
781 NVM Express device support
784 bool "mmc_spi - Set up MMC SPI device"
786 Provides a way to set up an MMC (Multimedia Card) SPI (Serial
787 Peripheral Interface) device. The device provides a means of
788 accessing an MMC device via SPI using a single data line, limited
789 to 20MHz. It is useful since it reduces the amount of protocol code
793 bool "onenand - access to onenand device"
795 OneNAND is a brand of NAND ('Not AND' gate) flash which provides
796 various useful features. This command allows reading, writing,
797 and erasing blocks. It allso provides a way to show and change
798 bad blocks, and test the device.
802 select PARTITION_UUIDS
804 Read and display information about the partition table on
808 bool "pci - Access PCI devices"
810 Provide access to PCI (Peripheral Interconnect Bus), a type of bus
811 used on some devices to allow the CPU to communicate with its
812 peripherals. Sub-commands allow bus enumeration, displaying and
813 changing configuration space and a few other features.
816 bool "pinit - Set up PCMCIA device"
818 Provides a means to initialise a PCMCIA (Personal Computer Memory
819 Card International Association) device. This is an old standard from
820 about 1990. These devices are typically removable memory or network
821 cards using a standard 68-pin connector.
824 bool "read - Read binary data from a partition"
826 Provides low-level access to the data in a partition.
828 config CMD_REMOTEPROC
830 depends on REMOTEPROC
832 Support for Remote Processor control
835 bool "sata - Access SATA subsystem"
838 SATA (Serial Advanced Technology Attachment) is a serial bus
839 standard for connecting to hard drives and other storage devices.
840 This command provides information about attached devices and allows
841 reading, writing and other operations.
843 SATA replaces PATA (originally just ATA), which stands for Parallel AT
844 Attachment, where AT refers to an IBM AT (Advanced Technology)
845 computer released in 1984.
848 bool "saves - Save a file over serial in S-Record format"
850 Provides a way to save a binary file using the Motorola S-Record
851 format over the serial line.
854 bool "sdram - Print SDRAM configuration information"
856 Provides information about attached SDRAM. This assumed that the
857 SDRAM has an EEPROM with information that can be read using the
858 I2C bus. This is only available on some boards.
866 bool "sf test - Allow testing of SPI flash"
868 Provides a way to test that SPI flash is working correctly. The
869 test is destructive, in that an area of SPI flash must be provided
870 for the test to use. Performance information is also provided,
871 measuring the performance of reading, writing and erasing in
872 Mbps (Million Bits Per Second). This value should approximately
873 equal the SPI bus speed for a single-bit-wide SPI bus, assuming
874 everything is working properly.
882 bool "tsi148 - Command to access tsi148 device"
884 This provides various sub-commands to initialise and configure the
885 Turndra tsi148 device. See the command help for full details.
888 bool "universe - Command to set up the Turndra Universe controller"
890 This allows setting up the VMEbus provided by this controller.
891 See the command help for full details.
900 select USB_FUNCTION_SDP
902 Enables the command "sdp" which is used to have U-Boot emulating the
903 Serial Download Protocol (SDP) via USB.
905 config CMD_USB_MASS_STORAGE
906 bool "UMS usb mass storage"
908 USB mass storage support
913 menu "Shell scripting commands"
925 Return true/false on integer compare.
931 Run script from memory
937 Evaluate boolean and math expressions and store the result in an env
939 Also supports loading the value at a memory location into a variable.
940 If CONFIG_REGEX is enabled, setexpr also supports a gsub function.
944 menu "Network commands"
947 bool "bootp, tftpboot"
952 bootp - boot image via network using BOOTP/TFTP protocol
953 tftpboot - boot image via network using TFTP protocol
958 TFTP put command, for uploading files to a server
963 Act as a TFTP server and boot the first received file
968 Boot image via network using RARP/TFTP protocol
973 Boot image via network using DHCP/TFTP protocol
979 Boot image via network using PXE protocol
985 Boot image via network using NFS protocol.
990 Enable MII utility commands.
995 Send ICMP ECHO_REQUEST to network host
1000 Perform CDP network configuration
1005 Synchronize RTC via network
1010 Lookup the IP of a hostname
1012 config CMD_LINK_LOCAL
1015 Acquire a network IP address using the link-local protocol
1020 Allow control of L2 Ethernet switch commands. These are supported
1021 by the vsc9953 Ethernet driver at present. Sub-commands allow
1022 operations such as enabling / disabling a port and
1023 viewing/maintaining the filtering database (FDB)
1027 menu "Misc commands"
1030 bool "Enable 'bmp' command"
1031 depends on LCD || DM_VIDEO || VIDEO
1033 This provides a way to obtain information about a BMP-format iamge
1034 and to display it. BMP (which presumably stands for BitMaP) is a
1035 file format defined by Microsoft which supports images of various
1036 depths, formats and compression methods. Headers on the file
1037 determine the formats used. This command can be used by first loading
1038 the image into RAM, then using this command to look at it or display
1042 bool "Enable board-specific commands"
1044 (deprecated: instead, please define a Kconfig option for each command)
1046 Some boards have board-specific commands which are only enabled
1047 during developemnt and need to be turned off for production. This
1048 option provides a way to control this. The commands that are enabled
1049 vary depending on the board.
1051 config CMD_BKOPS_ENABLE
1052 bool "mmc bkops enable"
1056 Enable command for setting manual background operations handshake
1057 on a eMMC device. The feature is optionally available on eMMC devices
1058 conforming to standard >= 4.41.
1060 config CMD_BLOCK_CACHE
1061 bool "blkcache - control and stats for block cache"
1062 depends on BLOCK_CACHE
1063 default y if BLOCK_CACHE
1065 Enable the blkcache command, which can be used to control the
1066 operation of the cache functions.
1067 This is most useful when fine-tuning the operation of the cache
1068 during development, but also allows the cache to be disabled when
1069 it might hurt performance (e.g. when using the ums command).
1072 bool "icache or dcache"
1074 Enable the "icache" and "dcache" commands
1077 bool "Enable the 'display' command, for character displays"
1079 (this needs porting to driver model)
1080 This enables the 'display' command which allows a string to be
1081 displayed on a simple board-specific display. Implement
1082 display_putc() to use it.
1088 Enable the 'led' command which allows for control of LEDs supported
1089 by the board. The LEDs can be listed with 'led list' and controlled
1090 with led on/off/togle/blink. Any LED drivers can be controlled with
1091 this command, e.g. led_gpio.
1097 Enable the 'date' command for getting/setting the time/date in RTC
1103 Run commands and summarize execution time.
1106 bool "gettime - read elapsed time"
1108 Enable the 'gettime' command which reads the elapsed time since
1109 U-Boot started running. This shows the time in seconds and
1110 milliseconds. See also the 'bootstage' command which provides more
1111 flexibility for boot timing.
1113 # TODO: rename to CMD_SLEEP
1118 Delay execution for some time
1123 Access the system timer.
1129 This provides basic access to the U-Boot's sound support. The main
1130 feature is to play a beep.
1132 sound init - set up sound system
1133 sound play - play a sound
1139 This provides access to the QEMU firmware interface. The main
1140 feature is to allow easy loading of files passed to qemu-system
1141 via -kernel / -initrd
1143 source "cmd/mvebu/Kconfig"
1146 bool "terminal - provides a way to attach a serial terminal"
1148 Provides a 'cu'-like serial terminal command. This can be used to
1149 access other serial ports from the system console. The terminal
1150 is very simple with no special processing of characters. As with
1151 cu, you can press ~. (tilde followed by period) to exit.
1154 bool "uuid, guid - generation of unique IDs"
1156 This enables two commands:
1158 uuid - generate random Universally Unique Identifier
1159 guid - generate Globally Unique Identifier based on random UUID
1161 The two commands are very similar except for the endianness of the
1166 config CMD_BOOTSTAGE
1167 bool "Enable the 'bootstage' command"
1168 depends on BOOTSTAGE
1170 Add a 'bootstage' command which supports printing a report
1171 and un/stashing of bootstage data.
1173 menu "Power commands"
1175 bool "Enable Driver Model PMIC command"
1178 This is the pmic command, based on a driver model pmic's API.
1179 Command features are unchanged:
1180 - list - list pmic devices
1181 - pmic dev <id> - show or [set] operating pmic device (NEW)
1182 - pmic dump - dump registers
1183 - pmic read address - read byte of register at address
1184 - pmic write address - write byte to register at address
1185 The only one change for this command is 'dev' subcommand.
1187 config CMD_REGULATOR
1188 bool "Enable Driver Model REGULATOR command"
1189 depends on DM_REGULATOR
1191 This command is based on driver model regulator's API.
1192 User interface features:
1193 - list - list regulator devices
1194 - regulator dev <id> - show or [set] operating regulator device
1195 - regulator info - print constraints info
1196 - regulator status - print operating status
1197 - regulator value <val] <-f> - print/[set] voltage value [uV]
1198 - regulator current <val> - print/[set] current value [uA]
1199 - regulator mode <id> - print/[set] operating mode id
1200 - regulator enable - enable the regulator output
1201 - regulator disable - disable the regulator output
1203 The '-f' (force) option can be used for set the value which exceeds
1204 the limits, which are found in device-tree and are kept in regulator's
1205 uclass platdata structure.
1209 menu "Security commands"
1211 bool "Enable the 'aes' command"
1214 This provides a means to encrypt and decrypt data using the AES
1215 (Advanced Encryption Standard). This algorithm uses a symetric key
1216 and is widely used as a streaming cipher. Different key lengths are
1217 supported by the algorithm but this command only supports 128 bits
1221 bool "Enable the 'blob' command"
1223 This is used with the Freescale secure boot mechanism.
1225 Freescale's SEC block has built-in Blob Protocol which provides
1226 a method for protecting user-defined data across system power
1227 cycles. SEC block protects data in a data structure called a Blob,
1228 which provides both confidentiality and integrity protection.
1230 Encapsulating data as a blob
1231 Each time that the Blob Protocol is used to protect data, a
1232 different randomly generated key is used to encrypt the data.
1233 This random key is itself encrypted using a key which is derived
1234 from SoC's non-volatile secret key and a 16 bit Key identifier.
1235 The resulting encrypted key along with encrypted data is called a
1236 blob. The non-volatile secure key is available for use only during
1239 During decapsulation, the reverse process is performed to get back
1243 blob enc - encapsulating data as a cryptgraphic blob
1244 blob dec - decapsulating cryptgraphic blob to get the data
1248 blob enc src dst len km
1250 Encapsulate and create blob of data $len bytes long
1251 at address $src and store the result at address $dst.
1252 $km is the 16 byte key modifier is also required for
1253 generation/use as key for cryptographic operation. Key
1254 modifier should be 16 byte long.
1256 blob dec src dst len km
1258 Decapsulate the blob of data at address $src and
1259 store result of $len byte at addr $dst.
1260 $km is the 16 byte key modifier is also required for
1261 generation/use as key for cryptographic operation. Key
1262 modifier should be 16 byte long.
1265 bool "Support 'hash' command"
1268 This provides a way to hash data in memory using various supported
1269 algorithms (such as SHA1, MD5, CRC32). The computed digest can be
1270 saved to memory or to an environment variable. It is also possible
1271 to verify a hash against data in memory.
1277 Add -v option to verify data against a hash.
1280 bool "Enable the 'tpm' command"
1283 This provides a means to talk to a TPM from the command line. A wide
1284 range of commands if provided - see 'tpm help' for details. The
1285 command requires a suitable TPM on your board and the correct driver
1289 bool "Enable the 'tpm test' command"
1292 This provides a a series of tests to confirm that the TPM is working
1293 correctly. The tests cover initialisation, non-volatile RAM, extend,
1294 global lock and checking that timing is within expectations. The
1295 tests pass correctly on Infineon TPMs but may need to be adjusted
1300 menu "Firmware commands"
1302 bool "Enable crosec command"
1306 Enable command-line access to the Chrome OS EC (Embedded
1307 Controller). This provides the 'crosec' command which has
1308 a number of sub-commands for performing EC tasks such as
1309 updating its flash, accessing a small saved context area
1310 and talking to the I2C bus behind the EC (if there is one).
1313 menu "Filesystem commands"
1315 bool "Enable the 'cbfs' command"
1318 Define this to enable support for reading from a Coreboot
1319 filesystem. This is a ROM-based filesystem used for accessing files
1320 on systems that use coreboot as the first boot-loader and then load
1321 U-Boot to actually boot the Operating System. Available commands are
1322 cbfsinit, cbfsinfo, cbfsls and cbfsload.
1325 bool "Enable the 'cramfs' command"
1326 depends on FS_CRAMFS
1328 This provides commands for dealing with CRAMFS (Compressed ROM
1329 filesystem). CRAMFS is useful when space is tight since files are
1330 compressed. Two commands are provided:
1332 cramfsls - lists files in a cramfs image
1333 cramfsload - loads a file from a cramfs image
1336 bool "ext2 command support"
1338 Enables EXT2 FS command
1341 bool "ext4 command support"
1343 Enables EXT4 FS command
1345 config CMD_EXT4_WRITE
1347 bool "ext4 write command support"
1349 Enables EXT4 FS write command
1352 bool "FAT command support"
1355 Support for the FAT fs
1357 config CMD_FS_GENERIC
1358 bool "filesystem commands"
1360 Enables filesystem commands (e.g. load, ls) that work for multiple
1364 bool "fsuuid command"
1366 Enables fsuuid command for filesystem UUID.
1369 bool "jffs2 command"
1372 Enables commands to support the JFFS2 (Journalling Flash File System
1373 version 2) filesystem. This enables fsload, ls and fsinfo which
1374 provide the ability to load files, list directories and obtain
1375 filesystem information.
1378 bool "MTD partition support"
1380 MTD partition support
1382 config MTDIDS_DEFAULT
1383 string "Default MTD IDs"
1384 depends on CMD_MTDPARTS
1386 Defines a default MTD ID
1388 config MTDPARTS_DEFAULT
1389 string "Default MTD partition scheme"
1390 depends on CMD_MTDPARTS
1392 Defines a default MTD partitioning scheme in the Linux MTD command
1393 line partitions format
1395 config CMD_MTDPARTS_SPREAD
1396 bool "Padd partition size to take account of bad blocks"
1397 depends on CMD_MTDPARTS
1399 This enables the 'spread' sub-command of the mtdparts command.
1400 This command will modify the existing mtdparts variable by increasing
1401 the size of the partitions such that 1) each partition's net size is
1402 at least as large as the size specified in the mtdparts variable and
1403 2) each partition starts on a good block.
1406 bool "reiser - Access to reiserfs filesystems"
1408 This provides two commands which operate on a resierfs filesystem,
1409 commonly used some years ago:
1411 reiserls - list files
1412 reiserload - load a file
1415 bool "scsi - Access to SCSI devices"
1418 This provides a 'scsi' command which provides access to SCSI (Small
1419 Computer System Interface) devices. The command provides a way to
1420 scan the bus, reset the bus, read and write data and get information
1424 bool "yaffs2 - Access of YAFFS2 filesystem"
1428 This provides commands for accessing a YAFFS2 filesystem. Yet
1429 Another Flash Filesystem 2 is a filesystem designed specifically
1430 for NAND flash. It incorporates bad-block management and ensures
1431 that device writes are sequential regardless of filesystem
1435 bool "zfs - Access of ZFS filesystem"
1437 This provides commands to accessing a ZFS filesystem, commonly used
1438 on Solaris systems. Two sub-commands are provided:
1440 zfsls - list files in a directory
1441 zfsload - load a file
1443 See doc/README.zfs for more details.
1447 menu "Debug commands"
1452 The bedbug (emBEDded deBUGger) command provides debugging features
1453 for some PowerPC processors. For details please see the
1454 docuemntation in doc/README.beddbug
1457 bool "diag - Board diagnostics"
1459 This command provides access to board diagnostic tests. These are
1460 called Power-on Self Tests (POST). The command allows listing of
1461 available tests and running either all the tests, or specific tests
1465 bool "irq - Show information about interrupts"
1466 depends on !ARM && !MIPS && !SH
1468 This enables two commands:
1470 interrupts - enable or disable interrupts
1471 irqinfo - print device-specific interrupt information
1474 bool "kgdb - Allow debugging of U-Boot with gdb"
1476 This enables a 'kgdb' command which allows gdb to connect to U-Boot
1477 over a serial link for debugging purposes. This allows
1478 single-stepping, inspecting variables, etc. This is supported only
1479 on PowerPC at present.
1482 bool "trace - Support tracing of function calls and timing"
1484 Enables a command to control using of function tracing within
1485 U-Boot. This allows recording of call traces including timing
1486 information. The command can write data to memory for exporting
1487 for analsys (e.g. using bootchart). See doc/README.trace for full
1493 tristate "Enable UBI - Unsorted block images commands"
1497 default y if NAND_SUNXI
1499 UBI is a software layer above MTD layer which admits use of LVM-like
1500 logical volumes on top of MTD devices, hides some complexities of
1501 flash chips like wear and bad blocks and provides some other useful
1502 capabilities. Please, consult the MTD web site for more details
1503 (www.linux-mtd.infradead.org). Activate this option if you want
1504 to use U-Boot UBI commands.
1507 tristate "Enable UBIFS - Unsorted block images filesystem commands"
1511 default y if CMD_UBI
1513 UBIFS is a file system for flash devices which works on top of UBI.
projects / u-boot / blob