1menu "Command line interface" 2 3config CMDLINE 4 bool "Support U-Boot commands" 5 default y 6 help 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. 13 14config HUSH_PARSER 15 bool "Use hush shell" 16 depends on CMDLINE 17 help 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"). 22 23 If disabled, you get the old, much simpler behaviour with a somewhat 24 smaller memory footprint. 25 26config SYS_PROMPT 27 string "Shell prompt" 28 default "=> " 29 help 30 This string is displayed in the command line to the left of the 31 cursor. 32 33menu "Autoboot options" 34 35config AUTOBOOT 36 bool "Autoboot" 37 default y 38 help 39 This enables the autoboot. See doc/README.autoboot for detail. 40 41config AUTOBOOT_KEYED 42 bool "Stop autobooting via specific input key / string" 43 default n 44 help 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. 50 51config AUTOBOOT_PROMPT 52 string "Autoboot stop prompt" 53 depends on AUTOBOOT_KEYED 54 default "Autoboot in %d seconds\\n" 55 help 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. 59 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. 66 67config AUTOBOOT_ENCRYPTION 68 bool "Enable encryption in autoboot stopping" 69 depends on AUTOBOOT_KEYED 70 default n 71 72config AUTOBOOT_DELAY_STR 73 string "Delay autobooting via specific input key / string" 74 depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION 75 help 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. 83 84config AUTOBOOT_STOP_STR 85 string "Stop autobooting via specific input key / string" 86 depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION 87 help 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. 95 96config AUTOBOOT_KEYED_CTRLC 97 bool "Enable Ctrl-C autoboot interruption" 98 depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION 99 default n 100 help 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. 105 106config AUTOBOOT_STOP_STR_SHA256 107 string "Stop autobooting via SHA256 encrypted password" 108 depends on AUTOBOOT_KEYED && AUTOBOOT_ENCRYPTION 109 help 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. 114 115endmenu 116 117source "cmd/fastboot/Kconfig" 118 119config BUILD_BIN2C 120 bool 121 122comment "Commands" 123 124menu "Info commands" 125 126config CMD_BDI 127 bool "bdinfo" 128 default y 129 help 130 Print board info 131 132config CMD_CONFIG 133 bool "config" 134 select BUILD_BIN2C 135 default SANDBOX 136 help 137 Print ".config" contents. 138 139 If this option is enabled, the ".config" file contents are embedded 140 in the U-Boot image and can be printed on the console by the "config" 141 command. This provides information of which options are enabled on 142 the running U-Boot. 143 144config CMD_CONSOLE 145 bool "coninfo" 146 default y 147 help 148 Print console devices and information. 149 150config CMD_CPU 151 bool "cpu" 152 help 153 Print information about available CPUs. This normally shows the 154 number of CPUs, type (e.g. manufacturer, architecture, product or 155 internal name) and clock frequency. Other information may be 156 available depending on the CPU driver. 157 158config CMD_LICENSE 159 bool "license" 160 select BUILD_BIN2C 161 help 162 Print GPL license text 163 164config CMD_REGINFO 165 bool "reginfo" 166 depends on PPC 167 help 168 Register dump 169 170endmenu 171 172menu "Boot commands" 173 174config CMD_BOOTD 175 bool "bootd" 176 default y 177 help 178 Run the command stored in the environment "bootcmd", i.e. 179 "bootd" does the same thing as "run bootcmd". 180 181config CMD_BOOTM 182 bool "bootm" 183 default y 184 help 185 Boot an application image from the memory. 186 187config CMD_BOOTZ 188 bool "bootz" 189 help 190 Boot the Linux zImage 191 192config CMD_BOOTI 193 bool "booti" 194 depends on ARM64 195 default y 196 help 197 Boot an AArch64 Linux Kernel image from memory. 198 199config CMD_BOOTEFI 200 bool "bootefi" 201 depends on EFI_LOADER 202 default y 203 help 204 Boot an EFI image from memory. 205 206config CMD_BOOTEFI_HELLO_COMPILE 207 bool "Compile a standard EFI hello world binary for testing" 208 depends on CMD_BOOTEFI && (ARM || X86) 209 default y 210 help 211 This compiles a standard EFI hello world application with U-Boot so 212 that it can be used with the test/py testing framework. This is useful 213 for testing that EFI is working at a basic level, and for bringing 214 up EFI support on a new architecture. 215 216 No additional space will be required in the resulting U-Boot binary 217 when this option is enabled. 218 219config CMD_BOOTEFI_HELLO 220 bool "Allow booting a standard EFI hello world for testing" 221 depends on CMD_BOOTEFI_HELLO_COMPILE 222 help 223 This adds a standard EFI hello world application to U-Boot so that 224 it can be used with the 'bootefi hello' command. This is useful 225 for testing that EFI is working at a basic level, and for bringing 226 up EFI support on a new architecture. 227 228config CMD_BOOTMENU 229 bool "bootmenu" 230 select MENU 231 help 232 Add an ANSI terminal boot menu command. 233 234config CMD_DTIMG 235 bool "dtimg" 236 select OF_LIBFDT_OVERLAY 237 help 238 Android DTB/DTBO image manipulation commands. Read dtb/dtbo files from 239 image into RAM, dump image structure information, etc. Those dtb/dtbo 240 files should be merged in one dtb further, which needs to be passed to 241 the kernel, as part of a boot process. 242 243config CMD_ELF 244 bool "bootelf, bootvx" 245 default y 246 help 247 Boot an ELF/vxWorks image from the memory. 248 249config CMD_FDT 250 bool "Flattened Device Tree utility commands" 251 default y 252 depends on OF_LIBFDT 253 help 254 Do FDT related setup before booting into the Operating System. 255 256config CMD_GO 257 bool "go" 258 default y 259 help 260 Start an application at a given address. 261 262config CMD_RUN 263 bool "run" 264 default y 265 help 266 Run the command in the given environment variable. 267 268config CMD_IMI 269 bool "iminfo" 270 default y 271 help 272 Print header information for application image. 273 274config CMD_IMLS 275 bool "imls" 276 default y 277 help 278 List all images found in flash 279 280config CMD_XIMG 281 bool "imxtract" 282 default y 283 help 284 Extract a part of a multi-image. 285 286config CMD_POWEROFF 287 bool "poweroff" 288 help 289 Poweroff/Shutdown the system 290 291config CMD_SPL 292 bool "spl export - Export boot information for Falcon boot" 293 depends on SPL 294 help 295 Falcon mode allows booting directly from SPL into an Operating 296 System such as Linux, thus skipping U-Boot proper. See 297 doc/README.falcon for full information about how to use this 298 command. 299 300config CMD_SPL_NAND_OFS 301 hex "Offset of OS command line args for Falcon-mode NAND boot" 302 depends on CMD_SPL 303 default 0 304 help 305 This provides the offset of the command line arguments for Linux 306 when booting from NAND in Falcon mode. See doc/README.falcon 307 for full information about how to use this option (and also see 308 board/gateworks/gw_ventana/README for an example). 309 310config CMD_SPL_WRITE_SIZE 311 hex "Size of argument area" 312 depends on CMD_SPL 313 default 0x2000 314 help 315 This provides the size of the command-line argument area in NAND 316 flash used by Falcon-mode boot. See the documentation until CMD_SPL 317 for detail. 318 319config CMD_THOR_DOWNLOAD 320 bool "thor - TIZEN 'thor' download" 321 help 322 Implements the 'thor' download protocol. This is a way of 323 downloading a software update over USB from an attached host. 324 There is no documentation about this within the U-Boot source code 325 but you should be able to find something on the interwebs. 326 327config CMD_ZBOOT 328 bool "zboot - x86 boot command" 329 help 330 With x86 machines it is common to boot a bzImage file which 331 contains both a kernel and a setup.bin file. The latter includes 332 configuration information from the dark ages which x86 boards still 333 need to pick things out of. 334 335 Consider using FIT in preference to this since it supports directly 336 booting both 32- and 64-bit kernels, as well as secure boot. 337 Documentation is available in doc/uImage.FIT/x86-fit-boot.txt 338 339endmenu 340 341menu "Environment commands" 342 343config CMD_ASKENV 344 bool "ask for env variable" 345 help 346 Ask for environment variable 347 348config CMD_EXPORTENV 349 bool "env export" 350 default y 351 help 352 Export environments. 353 354config CMD_IMPORTENV 355 bool "env import" 356 default y 357 help 358 Import environments. 359 360config CMD_EDITENV 361 bool "editenv" 362 default y 363 help 364 Edit environment variable. 365 366config CMD_GREPENV 367 bool "search env" 368 help 369 Allow for searching environment variables 370 371config CMD_SAVEENV 372 bool "saveenv" 373 default y 374 help 375 Save all environment variables into the compiled-in persistent 376 storage. 377 378config CMD_ENV_EXISTS 379 bool "env exists" 380 default y 381 help 382 Check if a variable is defined in the environment for use in 383 shell scripting. 384 385config CMD_ENV_CALLBACK 386 bool "env callbacks - print callbacks and their associated variables" 387 help 388 Some environment variable have callbacks defined by 389 U_BOOT_ENV_CALLBACK. These are called when the variable changes. 390 For example changing "baudrate" adjust the serial baud rate. This 391 command lists the currently defined callbacks. 392 393config CMD_ENV_FLAGS 394 bool "env flags -print variables that have non-default flags" 395 help 396 Some environment variables have special flags that control their 397 behaviour. For example, serial# can only be written once and cannot 398 be deleted. This command shows the variables that have special 399 flags. 400 401endmenu 402 403menu "Memory commands" 404 405config CMD_CRC32 406 bool "crc32" 407 select HASH 408 default y 409 help 410 Compute CRC32. 411 412config CRC32_VERIFY 413 bool "crc32 -v" 414 depends on CMD_CRC32 415 help 416 Add -v option to verify data against a crc32 checksum. 417 418config CMD_EEPROM 419 bool "eeprom - EEPROM subsystem" 420 help 421 (deprecated, needs conversion to driver model) 422 Provides commands to read and write EEPROM (Electrically Erasable 423 Programmable Read Only Memory) chips that are connected over an 424 I2C bus. 425 426config CMD_EEPROM_LAYOUT 427 bool "Enable layout-aware eeprom commands" 428 depends on CMD_EEPROM 429 help 430 (deprecated, needs conversion to driver model) 431 When enabled, additional eeprom sub-commands become available. 432 433 eeprom print - prints the contents of the eeprom in a human-readable 434 way (eeprom layout fields, and data formatted to be fit for human 435 consumption). 436 437 eeprom update - allows user to update eeprom fields by specifying 438 the field name, and providing the new data in a human readable format 439 (same format as displayed by the eeprom print command). 440 441 Both commands can either auto detect the layout, or be told which 442 layout to use. 443 444 Feature API: 445 __weak int parse_layout_version(char *str) 446 - override to provide your own layout name parsing 447 __weak void __eeprom_layout_assign(struct eeprom_layout *layout, 448 int layout_version); 449 - override to setup the layout metadata based on the version 450 __weak int eeprom_layout_detect(unsigned char *data) 451 - override to provide your own algorithm for detecting layout 452 version 453 eeprom_field.c 454 - contains various printing and updating functions for common 455 types of eeprom fields. Can be used for defining 456 custom layouts. 457 458config EEPROM_LAYOUT_HELP_STRING 459 string "Tells user what layout names are supported" 460 depends on CMD_EEPROM_LAYOUT 461 default "<not defined>" 462 help 463 Help printed with the LAYOUT VERSIONS part of the 'eeprom' 464 command's help. 465 466config LOOPW 467 bool "loopw" 468 help 469 Infinite write loop on address range 470 471config CMD_MD5SUM 472 bool "md5sum" 473 default n 474 select MD5 475 help 476 Compute MD5 checksum. 477 478config MD5SUM_VERIFY 479 bool "md5sum -v" 480 default n 481 depends on CMD_MD5SUM 482 help 483 Add -v option to verify data against an MD5 checksum. 484 485config CMD_MEMINFO 486 bool "meminfo" 487 help 488 Display memory information. 489 490config CMD_MEMORY 491 bool "md, mm, nm, mw, cp, cmp, base, loop" 492 default y 493 help 494 Memory commands. 495 md - memory display 496 mm - memory modify (auto-incrementing address) 497 nm - memory modify (constant address) 498 mw - memory write (fill) 499 cp - memory copy 500 cmp - memory compare 501 base - print or set address offset 502 loop - initialize loop on address range 503 504config CMD_MEMTEST 505 bool "memtest" 506 help 507 Simple RAM read/write test. 508 509config CMD_MX_CYCLIC 510 bool "mdc, mwc" 511 help 512 mdc - memory display cyclic 513 mwc - memory write cyclic 514 515config CMD_SHA1SUM 516 bool "sha1sum" 517 select SHA1 518 help 519 Compute SHA1 checksum. 520 521config SHA1SUM_VERIFY 522 bool "sha1sum -v" 523 depends on CMD_SHA1SUM 524 help 525 Add -v option to verify data against a SHA1 checksum. 526 527config CMD_STRINGS 528 bool "strings - display strings in memory" 529 help 530 This works similarly to the Unix 'strings' command except that it 531 works with a memory range. String of printable characters found 532 within the range are displayed. The minimum number of characters 533 for a sequence to be considered a string can be provided. 534 535config CMD_CRYPTO 536 bool "crypto test" 537 depends on DM_CRYPTO 538 select SHA1 539 select SHA256 540 select SHA512 541 select MD5 542 help 543 Crypto test. 544 545endmenu 546 547menu "Compression commands" 548 549config CMD_LZMADEC 550 bool "lzmadec" 551 default y if CMD_BOOTI 552 select LZMA 553 help 554 Support decompressing an LZMA (Lempel-Ziv-Markov chain algorithm) 555 image from memory. 556 557config CMD_UNZIP 558 bool "unzip" 559 default y if CMD_BOOTI 560 help 561 Uncompress a zip-compressed memory region. 562 563config CMD_ZIP 564 bool "zip" 565 help 566 Compress a memory region with zlib deflate method. 567 568endmenu 569 570menu "Device access commands" 571 572config CMD_ARMFLASH 573 #depends on FLASH_CFI_DRIVER 574 bool "armflash" 575 help 576 ARM Ltd reference designs flash partition access 577 578config CMD_CLK 579 bool "clk - Show clock frequencies" 580 help 581 (deprecated) 582 Shows clock frequences by calling a sock_clk_dump() hook function. 583 This is depreated in favour of using the CLK uclass and accessing 584 clock values from associated drivers. However currently no command 585 exists for this. 586 587config CMD_DEMO 588 bool "demo - Demonstration commands for driver model" 589 depends on DM 590 help 591 Provides a 'demo' command which can be used to play around with 592 driver model. To use this properly you will need to enable one or 593 both of the demo devices (DM_DEMO_SHAPE and DM_DEMO_SIMPLE). 594 Otherwise you will always get an empty list of devices. The demo 595 devices are defined in the sandbox device tree, so the easiest 596 option is to use sandbox and pass the -d point to sandbox's 597 u-boot.dtb file. 598 599config CMD_DFU 600 bool "dfu" 601 select USB_FUNCTION_DFU 602 help 603 Enables the command "dfu" which is used to have U-Boot create a DFU 604 class device via USB. This command requires that the "dfu_alt_info" 605 environment variable be set and define the alt settings to expose to 606 the host. 607 608config CMD_DM 609 bool "dm - Access to driver model information" 610 depends on DM 611 default y 612 help 613 Provides access to driver model data structures and information, 614 such as a list of devices, list of uclasses and the state of each 615 device (e.g. activated). This is not required for operation, but 616 can be useful to see the state of driver model for debugging or 617 interest. 618 619config CMD_FDC 620 bool "fdcboot - Boot from floppy device" 621 help 622 The 'fdtboot' command allows booting an image from a floppy disk. 623 624config CMD_FLASH 625 bool "flinfo, erase, protect" 626 default y 627 help 628 NOR flash support. 629 flinfo - print FLASH memory information 630 erase - FLASH memory 631 protect - enable or disable FLASH write protection 632 633config CMD_FPGA 634 bool "fpga" 635 default y 636 help 637 FPGA support. 638 639config CMD_FPGA_LOADBP 640 bool "fpga loadbp - load partial bitstream (Xilinx only)" 641 depends on CMD_FPGA 642 help 643 Supports loading an FPGA device from a bitstream buffer containing 644 a partial bitstream. 645 646config CMD_FPGA_LOADFS 647 bool "fpga loadfs - load bitstream from FAT filesystem (Xilinx only)" 648 depends on CMD_FPGA 649 help 650 Supports loading an FPGA device from a FAT filesystem. 651 652config CMD_FPGA_LOADMK 653 bool "fpga loadmk - load bitstream from image" 654 depends on CMD_FPGA 655 help 656 Supports loading an FPGA device from a image generated by mkimage. 657 658config CMD_FPGA_LOADP 659 bool "fpga loadp - load partial bitstream" 660 depends on CMD_FPGA 661 help 662 Supports loading an FPGA device from a bitstream buffer containing 663 a partial bitstream. 664 665config CMD_FPGAD 666 bool "fpgad - dump FPGA registers" 667 help 668 (legacy, needs conversion to driver model) 669 Provides a way to dump FPGA registers by calling the board-specific 670 fpga_get_reg() function. This functions similarly to the 'md' 671 command. 672 673config CMD_FUSE 674 bool "fuse - support for the fuse subssystem" 675 help 676 (deprecated - needs conversion to driver model) 677 This allows reading, sensing, programming or overriding fuses 678 which control the behaviour of the device. The command uses the 679 fuse_...() API. 680 681config CMD_GPIO 682 bool "gpio" 683 help 684 GPIO support. 685 686config CMD_GPT 687 bool "GPT (GUID Partition Table) command" 688 select PARTITION_UUIDS 689 select EFI_PARTITION 690 imply RANDOM_UUID 691 help 692 Enable the 'gpt' command to ready and write GPT style partition 693 tables. 694 695config RANDOM_UUID 696 bool "GPT Random UUID generation" 697 help 698 Enable the generation of partitions with random UUIDs if none 699 are provided. 700 701config CMD_GPT_RENAME 702 bool "GPT partition renaming commands" 703 depends on CMD_GPT 704 help 705 Enables the 'gpt' command to interchange names on two GPT 706 partitions via the 'gpt swap' command or to rename single 707 partitions via the 'rename' command. 708 709config CMD_IDE 710 bool "ide - Support for IDE drivers" 711 select IDE 712 help 713 Provides an 'ide' command which allows accessing the IDE drive, 714 reseting the IDE interface, printing the partition table and 715 geting device info. It also enables the 'diskboot' command which 716 permits booting from an IDE drive. 717 718config CMD_IO 719 bool "io - Support for performing I/O accesses" 720 help 721 Provides an 'iod' command to display I/O space and an 'iow' command 722 to write values to the I/O space. This can be useful for manually 723 checking the state of devices during boot when debugging device 724 drivers, etc. 725 726config CMD_IOTRACE 727 bool "iotrace - Support for tracing I/O activity" 728 help 729 Provides an 'iotrace' command which supports recording I/O reads and 730 writes in a trace buffer in memory . It also maintains a checksum 731 of the trace records (even if space is exhausted) so that the 732 sequence of I/O accesses can be verified. 733 734 When debugging drivers it is useful to see what I/O accesses were 735 done and in what order. 736 737 Even if the individual accesses are of little interest it can be 738 useful to verify that the access pattern is consistent each time 739 an operation is performed. In this case a checksum can be used to 740 characterise the operation of a driver. The checksum can be compared 741 across different runs of the operation to verify that the driver is 742 working properly. 743 744 In particular, when performing major refactoring of the driver, where 745 the access pattern should not change, the checksum provides assurance 746 that the refactoring work has not broken the driver. 747 748 This works by sneaking into the io.h heder for an architecture and 749 redirecting I/O accesses through iotrace's tracing mechanism. 750 751 For now no commands are provided to examine the trace buffer. The 752 format is fairly simple, so 'md' is a reasonable substitute. 753 754 Note: The checksum feature is only useful for I/O regions where the 755 contents do not change outside of software control. Where this is not 756 suitable you can fall back to manually comparing the addresses. It 757 might be useful to enhance tracing to only checksum the accesses and 758 not the data read/written. 759 760config CMD_I2C 761 bool "i2c" 762 help 763 I2C support. 764 765config CMD_LOADB 766 bool "loadb" 767 default y 768 help 769 Load a binary file over serial line. 770 771config CMD_LOADS 772 bool "loads" 773 default y 774 help 775 Load an S-Record file over serial line 776 777config CMD_LOAD_ANDROID 778 bool "load_android" 779 default n 780 depends on ANDROID_BOOT_IMAGE 781 help 782 Load an Android Boot image from storage. The Android Boot images 783 define the size and kernel address on the header, which are used by 784 this command. 785 786config CMD_BOOT_ANDROID 787 bool "boot_android" 788 default n 789 depends on ANDROID_BOOTLOADER 790 help 791 Performs the Android Bootloader boot flow, loading the appropriate 792 Android image (normal kernel, recovery kernel or "bootloader" mode) 793 and booting it. The boot mode is determined by the contents of the 794 Android Bootloader Message. 795 796config CMD_ANDROID_AB_SELECT 797 bool "android_ab_select" 798 default n 799 depends on ANDROID_AB 800 help 801 On Android devices with more than one boot slot (multiple copies of 802 the kernel and system images) this provides a command to select which 803 slot should be used to boot from and register the boot attempt. This 804 is used by the new A/B update model where one slot is updated in the 805 background while running from the other slot. 806 807config CMD_BOOT_FIT 808 bool "boot_fit" 809 default n 810 depends on ROCKCHIP_FIT_IMAGE 811 help 812 Performs the FIT boot flow, loading the appropriate FIT image from 813 boot/recovery partition containing kernel/fdt/ramdisk images. 814 Additional that, the IH_TYPE_MULTI can be used for resource file. 815 816config CMD_BOOT_ROCKCHIP 817 bool "boot_rockchip" 818 default n 819 depends on RKIMG_BOOTLOADER 820 help 821 Performs the Rockchip Bootloader boot flow, loading the appropriate 822 Rockchip image (normal kernel, boot, resource and revocery) 823 and booting it. The boot mode is determined by the contents of the 824 Rockchip bootloader helper. 825 826config CMD_MMC 827 bool "mmc" 828 help 829 MMC memory mapped support. 830 831config CMD_MTD 832 bool "mtd" 833 select MTD_PARTITIONS 834 help 835 MTD commands support. 836 837config CMD_NAND 838 bool "nand" 839 default y if NAND_SUNXI 840 help 841 NAND support. 842 843if CMD_NAND 844config CMD_NAND_TRIMFFS 845 bool "nand write.trimffs" 846 default y if ARCH_SUNXI 847 help 848 Allows one to skip empty pages when flashing something on a NAND. 849 850config CMD_NAND_LOCK_UNLOCK 851 bool "nand lock/unlock" 852 help 853 NAND locking support. 854 855config CMD_NAND_TORTURE 856 bool "nand torture" 857 help 858 NAND torture support. 859 860endif # CMD_NAND 861 862config CMD_NVME 863 bool "nvme" 864 depends on NVME 865 default y if NVME 866 help 867 NVM Express device support 868 869config CMD_MMC_SPI 870 bool "mmc_spi - Set up MMC SPI device" 871 help 872 Provides a way to set up an MMC (Multimedia Card) SPI (Serial 873 Peripheral Interface) device. The device provides a means of 874 accessing an MMC device via SPI using a single data line, limited 875 to 20MHz. It is useful since it reduces the amount of protocol code 876 required. 877 878config CMD_ONENAND 879 bool "onenand - access to onenand device" 880 help 881 OneNAND is a brand of NAND ('Not AND' gate) flash which provides 882 various useful features. This command allows reading, writing, 883 and erasing blocks. It allso provides a way to show and change 884 bad blocks, and test the device. 885 886config CMD_PART 887 bool "part" 888 select PARTITION_UUIDS 889 help 890 Read and display information about the partition table on 891 various media. 892 893config CMD_PCI 894 bool "pci - Access PCI devices" 895 help 896 Provide access to PCI (Peripheral Interconnect Bus), a type of bus 897 used on some devices to allow the CPU to communicate with its 898 peripherals. Sub-commands allow bus enumeration, displaying and 899 changing configuration space and a few other features. 900 901config CMD_PCMCIA 902 bool "pinit - Set up PCMCIA device" 903 help 904 Provides a means to initialise a PCMCIA (Personal Computer Memory 905 Card International Association) device. This is an old standard from 906 about 1990. These devices are typically removable memory or network 907 cards using a standard 68-pin connector. 908 909config CMD_READ 910 bool "read - Read binary data from a partition" 911 help 912 Provides low-level access to the data in a partition. 913 914config CMD_REMOTEPROC 915 bool "remoteproc" 916 depends on REMOTEPROC 917 help 918 Support for Remote Processor control 919 920config CMD_ROCKUSB 921 bool "rockusb - Command to upgrade Rockchip device" 922 depends on USB_GADGET 923 help 924 Rockusb command provides a way to upgrade firmware for 925 Rockchip SoC based devices, its design make use of USB 926 Bulk-Only Transport based on UMS framework. 927 928config CMD_RKNAND 929 bool "rknand" 930 depends on (RKNAND || RKNANDC_NAND) 931 default y if (RKNAND || RKNANDC_NAND) 932 help 933 Rockchip NAND FLASH device support 934 935config CMD_RKSFC 936 bool "rksfc" 937 depends on (RKSFC_NOR || RKSFC_NAND) 938 default y if (RKSFC_NOR || RKSFC_NAND) 939 help 940 Rockchip SFC device support 941 942config CMD_RK_SECURE_STORAGE 943 bool "dump rockchip efuse/otp content" 944 help 945 Dump the data which is written in OTP or efuse. 946 947config CMD_SATA 948 bool "sata - Access SATA subsystem" 949 select SATA 950 help 951 SATA (Serial Advanced Technology Attachment) is a serial bus 952 standard for connecting to hard drives and other storage devices. 953 This command provides information about attached devices and allows 954 reading, writing and other operations. 955 956 SATA replaces PATA (originally just ATA), which stands for Parallel AT 957 Attachment, where AT refers to an IBM AT (Advanced Technology) 958 computer released in 1984. 959 960config CMD_SAVES 961 bool "saves - Save a file over serial in S-Record format" 962 help 963 Provides a way to save a binary file using the Motorola S-Record 964 format over the serial line. 965 966config CMD_SDRAM 967 bool "sdram - Print SDRAM configuration information" 968 help 969 Provides information about attached SDRAM. This assumed that the 970 SDRAM has an EEPROM with information that can be read using the 971 I2C bus. This is only available on some boards. 972 973config CMD_SF 974 bool "sf" 975 help 976 SPI Flash support 977 978config CMD_SF_TEST 979 bool "sf test - Allow testing of SPI flash" 980 help 981 Provides a way to test that SPI flash is working correctly. The 982 test is destructive, in that an area of SPI flash must be provided 983 for the test to use. Performance information is also provided, 984 measuring the performance of reading, writing and erasing in 985 Mbps (Million Bits Per Second). This value should approximately 986 equal the SPI bus speed for a single-bit-wide SPI bus, assuming 987 everything is working properly. 988 989config CMD_SPI 990 bool "sspi" 991 help 992 SPI utility command. 993 994config CMD_TSI148 995 bool "tsi148 - Command to access tsi148 device" 996 help 997 This provides various sub-commands to initialise and configure the 998 Turndra tsi148 device. See the command help for full details. 999 1000config CMD_UNIVERSE 1001 bool "universe - Command to set up the Turndra Universe controller" 1002 help 1003 This allows setting up the VMEbus provided by this controller. 1004 See the command help for full details. 1005 1006config CMD_USB 1007 bool "usb" 1008 help 1009 USB support. 1010 1011config CMD_USB_SDP 1012 bool "sdp" 1013 select USB_FUNCTION_SDP 1014 help 1015 Enables the command "sdp" which is used to have U-Boot emulating the 1016 Serial Download Protocol (SDP) via USB. 1017 1018config CMD_USB_MASS_STORAGE 1019 bool "UMS usb mass storage" 1020 help 1021 USB mass storage support 1022 1023endmenu 1024 1025 1026menu "Shell scripting commands" 1027 1028config CMD_ECHO 1029 bool "echo" 1030 default y 1031 help 1032 Echo args to console 1033 1034config CMD_ITEST 1035 bool "itest" 1036 default y 1037 help 1038 Return true/false on integer compare. 1039 1040config CMD_SOURCE 1041 bool "source" 1042 default y 1043 help 1044 Run script from memory 1045 1046config CMD_SETEXPR 1047 bool "setexpr" 1048 default y 1049 help 1050 Evaluate boolean and math expressions and store the result in an env 1051 variable. 1052 Also supports loading the value at a memory location into a variable. 1053 If CONFIG_REGEX is enabled, setexpr also supports a gsub function. 1054 1055endmenu 1056 1057menu "Network commands" 1058 1059config CMD_NET 1060 bool "bootp, tftpboot" 1061 select NET 1062 default y 1063 help 1064 Network commands. 1065 bootp - boot image via network using BOOTP/TFTP protocol 1066 tftpboot - boot image via network using TFTP protocol 1067 1068config CMD_TFTPPUT 1069 bool "tftp put" 1070 help 1071 TFTP put command, for uploading files to a server 1072 1073config CMD_TFTPSRV 1074 bool "tftpsrv" 1075 help 1076 Act as a TFTP server and boot the first received file 1077 1078config CMD_RARP 1079 bool "rarpboot" 1080 help 1081 Boot image via network using RARP/TFTP protocol 1082 1083config CMD_DHCP 1084 bool "dhcp" 1085 help 1086 Boot image via network using DHCP/TFTP protocol 1087 1088config CMD_PXE 1089 bool "pxe" 1090 select MENU 1091 help 1092 Boot image via network using PXE protocol 1093 1094config CMD_NFS 1095 bool "nfs" 1096 default y 1097 help 1098 Boot image via network using NFS protocol. 1099 1100config CMD_MII 1101 bool "mii" 1102 help 1103 Enable MII utility commands. 1104 1105config CMD_PING 1106 bool "ping" 1107 help 1108 Send ICMP ECHO_REQUEST to network host 1109 1110config CMD_CDP 1111 bool "cdp" 1112 help 1113 Perform CDP network configuration 1114 1115config CMD_SNTP 1116 bool "sntp" 1117 help 1118 Synchronize RTC via network 1119 1120config CMD_DNS 1121 bool "dns" 1122 help 1123 Lookup the IP of a hostname 1124 1125config CMD_LINK_LOCAL 1126 bool "linklocal" 1127 help 1128 Acquire a network IP address using the link-local protocol 1129 1130config CMD_ETHSW 1131 bool "ethsw" 1132 help 1133 Allow control of L2 Ethernet switch commands. These are supported 1134 by the vsc9953 Ethernet driver at present. Sub-commands allow 1135 operations such as enabling / disabling a port and 1136 viewing/maintaining the filtering database (FDB) 1137 1138endmenu 1139 1140config CMD_MEMTESTER 1141 bool "Enable memtester for ddr" 1142 help 1143 This enables memtester for ddr. 1144 1145config CMD_DDR_TEST_TOOL 1146 bool "Enable ddr test tool" 1147 help 1148 This enable ddr test tool code. 1149 1150menu "Misc commands" 1151 1152config CMD_BMP 1153 bool "Enable 'bmp' command" 1154 depends on LCD || DM_VIDEO || VIDEO 1155 help 1156 This provides a way to obtain information about a BMP-format iamge 1157 and to display it. BMP (which presumably stands for BitMaP) is a 1158 file format defined by Microsoft which supports images of various 1159 depths, formats and compression methods. Headers on the file 1160 determine the formats used. This command can be used by first loading 1161 the image into RAM, then using this command to look at it or display 1162 it. 1163 1164config CMD_BSP 1165 bool "Enable board-specific commands" 1166 help 1167 (deprecated: instead, please define a Kconfig option for each command) 1168 1169 Some boards have board-specific commands which are only enabled 1170 during developemnt and need to be turned off for production. This 1171 option provides a way to control this. The commands that are enabled 1172 vary depending on the board. 1173 1174config CMD_BKOPS_ENABLE 1175 bool "mmc bkops enable" 1176 depends on CMD_MMC 1177 default n 1178 help 1179 Enable command for setting manual background operations handshake 1180 on a eMMC device. The feature is optionally available on eMMC devices 1181 conforming to standard >= 4.41. 1182 1183config CMD_BLOCK_CACHE 1184 bool "blkcache - control and stats for block cache" 1185 depends on BLOCK_CACHE 1186 default y if BLOCK_CACHE 1187 help 1188 Enable the blkcache command, which can be used to control the 1189 operation of the cache functions. 1190 This is most useful when fine-tuning the operation of the cache 1191 during development, but also allows the cache to be disabled when 1192 it might hurt performance (e.g. when using the ums command). 1193 1194config CMD_CACHE 1195 bool "icache or dcache" 1196 help 1197 Enable the "icache" and "dcache" commands 1198 1199config CMD_DISPLAY 1200 bool "Enable the 'display' command, for character displays" 1201 help 1202 (this needs porting to driver model) 1203 This enables the 'display' command which allows a string to be 1204 displayed on a simple board-specific display. Implement 1205 display_putc() to use it. 1206 1207config CMD_LED 1208 bool "led" 1209 default y if LED 1210 help 1211 Enable the 'led' command which allows for control of LEDs supported 1212 by the board. The LEDs can be listed with 'led list' and controlled 1213 with led on/off/togle/blink. Any LED drivers can be controlled with 1214 this command, e.g. led_gpio. 1215 1216config CMD_DATE 1217 bool "date" 1218 default y if DM_RTC 1219 help 1220 Enable the 'date' command for getting/setting the time/date in RTC 1221 devices. 1222 1223config CMD_TIME 1224 bool "time" 1225 help 1226 Run commands and summarize execution time. 1227 1228config CMD_GETTIME 1229 bool "gettime - read elapsed time" 1230 help 1231 Enable the 'gettime' command which reads the elapsed time since 1232 U-Boot started running. This shows the time in seconds and 1233 milliseconds. See also the 'bootstage' command which provides more 1234 flexibility for boot timing. 1235 1236# TODO: rename to CMD_SLEEP 1237config CMD_MISC 1238 bool "sleep" 1239 default y 1240 help 1241 Delay execution for some time 1242 1243config CMD_TIMER 1244 bool "timer" 1245 help 1246 Access the system timer. 1247 1248config CMD_SOUND 1249 bool "sound" 1250 depends on SOUND 1251 help 1252 This provides basic access to the U-Boot's sound support. The main 1253 feature is to play a beep. 1254 1255 sound init - set up sound system 1256 sound play - play a sound 1257 1258config CMD_QFW 1259 bool "qfw" 1260 select QFW 1261 help 1262 This provides access to the QEMU firmware interface. The main 1263 feature is to allow easy loading of files passed to qemu-system 1264 via -kernel / -initrd 1265 1266source "cmd/mvebu/Kconfig" 1267 1268config CMD_TERMINAL 1269 bool "terminal - provides a way to attach a serial terminal" 1270 help 1271 Provides a 'cu'-like serial terminal command. This can be used to 1272 access other serial ports from the system console. The terminal 1273 is very simple with no special processing of characters. As with 1274 cu, you can press ~. (tilde followed by period) to exit. 1275 1276config CMD_UUID 1277 bool "uuid, guid - generation of unique IDs" 1278 help 1279 This enables two commands: 1280 1281 uuid - generate random Universally Unique Identifier 1282 guid - generate Globally Unique Identifier based on random UUID 1283 1284 The two commands are very similar except for the endianness of the 1285 output. 1286 1287endmenu 1288 1289config CMD_BOOTSTAGE 1290 bool "Enable the 'bootstage' command" 1291 depends on BOOTSTAGE 1292 help 1293 Add a 'bootstage' command which supports printing a report 1294 and un/stashing of bootstage data. 1295 1296menu "Power commands" 1297config CMD_PMIC 1298 bool "Enable Driver Model PMIC command" 1299 depends on DM_PMIC 1300 help 1301 This is the pmic command, based on a driver model pmic's API. 1302 Command features are unchanged: 1303 - list - list pmic devices 1304 - pmic dev <id> - show or [set] operating pmic device (NEW) 1305 - pmic dump - dump registers 1306 - pmic read address - read byte of register at address 1307 - pmic write address - write byte to register at address 1308 The only one change for this command is 'dev' subcommand. 1309 1310config CMD_REGULATOR 1311 bool "Enable Driver Model REGULATOR command" 1312 depends on DM_REGULATOR 1313 help 1314 This command is based on driver model regulator's API. 1315 User interface features: 1316 - list - list regulator devices 1317 - regulator dev <id> - show or [set] operating regulator device 1318 - regulator info - print constraints info 1319 - regulator status - print operating status 1320 - regulator value <val] <-f> - print/[set] voltage value [uV] 1321 - regulator current <val> - print/[set] current value [uA] 1322 - regulator mode <id> - print/[set] operating mode id 1323 - regulator enable - enable the regulator output 1324 - regulator disable - disable the regulator output 1325 1326 The '-f' (force) option can be used for set the value which exceeds 1327 the limits, which are found in device-tree and are kept in regulator's 1328 uclass platdata structure. 1329 1330config CMD_CHARGE_DISPLAY 1331 bool "Enable Driver Model Charge Display command" 1332 depends on DM_CHARGE_DISPLAY 1333 default y 1334 help 1335 Support U-Boot charge display. 1336 1337config CMD_DVFS 1338 bool "Enable Driver Model DVFS command" 1339 depends on DM_DVFS 1340 default y 1341 help 1342 Support dvfs policy apply API 1343 User interface features: 1344 - dvfs - apply dvfs policy once 1345 - dvfs repeat - repeat apply dvfs policy until achieve the target temperature 1346 1347endmenu 1348 1349menu "Security commands" 1350config CMD_AES 1351 bool "Enable the 'aes' command" 1352 select AES 1353 help 1354 This provides a means to encrypt and decrypt data using the AES 1355 (Advanced Encryption Standard). This algorithm uses a symetric key 1356 and is widely used as a streaming cipher. Different key lengths are 1357 supported by the algorithm but this command only supports 128 bits 1358 at present. 1359 1360config CMD_BLOB 1361 bool "Enable the 'blob' command" 1362 help 1363 This is used with the Freescale secure boot mechanism. 1364 1365 Freescale's SEC block has built-in Blob Protocol which provides 1366 a method for protecting user-defined data across system power 1367 cycles. SEC block protects data in a data structure called a Blob, 1368 which provides both confidentiality and integrity protection. 1369 1370 Encapsulating data as a blob 1371 Each time that the Blob Protocol is used to protect data, a 1372 different randomly generated key is used to encrypt the data. 1373 This random key is itself encrypted using a key which is derived 1374 from SoC's non-volatile secret key and a 16 bit Key identifier. 1375 The resulting encrypted key along with encrypted data is called a 1376 blob. The non-volatile secure key is available for use only during 1377 secure boot. 1378 1379 During decapsulation, the reverse process is performed to get back 1380 the original data. 1381 1382 Sub-commands: 1383 blob enc - encapsulating data as a cryptgraphic blob 1384 blob dec - decapsulating cryptgraphic blob to get the data 1385 1386 Syntax: 1387 1388 blob enc src dst len km 1389 1390 Encapsulate and create blob of data $len bytes long 1391 at address $src and store the result at address $dst. 1392 $km is the 16 byte key modifier is also required for 1393 generation/use as key for cryptographic operation. Key 1394 modifier should be 16 byte long. 1395 1396 blob dec src dst len km 1397 1398 Decapsulate the blob of data at address $src and 1399 store result of $len byte at addr $dst. 1400 $km is the 16 byte key modifier is also required for 1401 generation/use as key for cryptographic operation. Key 1402 modifier should be 16 byte long. 1403 1404config CMD_HASH 1405 bool "Support 'hash' command" 1406 select HASH 1407 help 1408 This provides a way to hash data in memory using various supported 1409 algorithms (such as SHA1, MD5, CRC32). The computed digest can be 1410 saved to memory or to an environment variable. It is also possible 1411 to verify a hash against data in memory. 1412 1413config HASH_VERIFY 1414 bool "hash -v" 1415 depends on CMD_HASH 1416 help 1417 Add -v option to verify data against a hash. 1418 1419config CMD_TPM 1420 bool "Enable the 'tpm' command" 1421 depends on TPM 1422 help 1423 This provides a means to talk to a TPM from the command line. A wide 1424 range of commands if provided - see 'tpm help' for details. The 1425 command requires a suitable TPM on your board and the correct driver 1426 must be enabled. 1427 1428config CMD_TPM_TEST 1429 bool "Enable the 'tpm test' command" 1430 depends on CMD_TPM 1431 help 1432 This provides a a series of tests to confirm that the TPM is working 1433 correctly. The tests cover initialisation, non-volatile RAM, extend, 1434 global lock and checking that timing is within expectations. The 1435 tests pass correctly on Infineon TPMs but may need to be adjusted 1436 for other devices. 1437 1438endmenu 1439 1440menu "Firmware commands" 1441config CMD_CROS_EC 1442 bool "Enable crosec command" 1443 depends on CROS_EC 1444 default y 1445 help 1446 Enable command-line access to the Chrome OS EC (Embedded 1447 Controller). This provides the 'crosec' command which has 1448 a number of sub-commands for performing EC tasks such as 1449 updating its flash, accessing a small saved context area 1450 and talking to the I2C bus behind the EC (if there is one). 1451endmenu 1452 1453menu "Filesystem commands" 1454config CMD_CBFS 1455 bool "Enable the 'cbfs' command" 1456 depends on FS_CBFS 1457 help 1458 Define this to enable support for reading from a Coreboot 1459 filesystem. This is a ROM-based filesystem used for accessing files 1460 on systems that use coreboot as the first boot-loader and then load 1461 U-Boot to actually boot the Operating System. Available commands are 1462 cbfsinit, cbfsinfo, cbfsls and cbfsload. 1463 1464config CMD_CRAMFS 1465 bool "Enable the 'cramfs' command" 1466 depends on FS_CRAMFS 1467 help 1468 This provides commands for dealing with CRAMFS (Compressed ROM 1469 filesystem). CRAMFS is useful when space is tight since files are 1470 compressed. Two commands are provided: 1471 1472 cramfsls - lists files in a cramfs image 1473 cramfsload - loads a file from a cramfs image 1474 1475config CMD_EXT2 1476 bool "ext2 command support" 1477 help 1478 Enables EXT2 FS command 1479 1480config CMD_EXT4 1481 bool "ext4 command support" 1482 help 1483 Enables EXT4 FS command 1484 1485config CMD_EXT4_WRITE 1486 depends on CMD_EXT4 1487 bool "ext4 write command support" 1488 help 1489 Enables EXT4 FS write command 1490 1491config CMD_FAT 1492 bool "FAT command support" 1493 select FS_FAT 1494 help 1495 Support for the FAT fs 1496 1497config CMD_FS_GENERIC 1498 bool "filesystem commands" 1499 help 1500 Enables filesystem commands (e.g. load, ls) that work for multiple 1501 fs types. 1502 1503config CMD_FS_UUID 1504 bool "fsuuid command" 1505 help 1506 Enables fsuuid command for filesystem UUID. 1507 1508config CMD_JFFS2 1509 bool "jffs2 command" 1510 select FS_JFFS2 1511 help 1512 Enables commands to support the JFFS2 (Journalling Flash File System 1513 version 2) filesystem. This enables fsload, ls and fsinfo which 1514 provide the ability to load files, list directories and obtain 1515 filesystem information. 1516 1517config CMD_MTDPARTS 1518 bool "MTD partition support" 1519 select MTD_DEVICE if (CMD_NAND || NAND) 1520 help 1521 MTD partition support 1522 1523config CMD_MTD 1524 bool "MTD support" 1525 help 1526 MTD support 1527 1528config CMD_MTD_BLK 1529 bool "MTD block support" 1530 help 1531 MTD block support 1532 1533config MTDIDS_DEFAULT 1534 string "Default MTD IDs" 1535 depends on CMD_MTD || CMD_MTDPARTS || CMD_NAND || CMD_FLASH 1536 help 1537 Defines a default MTD ID 1538 1539config MTDPARTS_DEFAULT 1540 string "Default MTD partition scheme" 1541 depends on CMD_MTD || CMD_MTDPARTS || CMD_NAND || CMD_FLASH 1542 help 1543 Defines a default MTD partitioning scheme in the Linux MTD command 1544 line partitions format 1545 1546config CMD_MTDPARTS_SPREAD 1547 bool "Padd partition size to take account of bad blocks" 1548 depends on CMD_MTDPARTS 1549 help 1550 This enables the 'spread' sub-command of the mtdparts command. 1551 This command will modify the existing mtdparts variable by increasing 1552 the size of the partitions such that 1) each partition's net size is 1553 at least as large as the size specified in the mtdparts variable and 1554 2) each partition starts on a good block. 1555 1556config CMD_REISER 1557 bool "reiser - Access to reiserfs filesystems" 1558 help 1559 This provides two commands which operate on a resierfs filesystem, 1560 commonly used some years ago: 1561 1562 reiserls - list files 1563 reiserload - load a file 1564 1565config CMD_SCSI 1566 bool "scsi - Access to SCSI devices" 1567 default y if SCSI 1568 help 1569 This provides a 'scsi' command which provides access to SCSI (Small 1570 Computer System Interface) devices. The command provides a way to 1571 scan the bus, reset the bus, read and write data and get information 1572 about devices. 1573 1574config CMD_YAFFS2 1575 bool "yaffs2 - Access of YAFFS2 filesystem" 1576 depends on YAFFS2 1577 default y 1578 help 1579 This provides commands for accessing a YAFFS2 filesystem. Yet 1580 Another Flash Filesystem 2 is a filesystem designed specifically 1581 for NAND flash. It incorporates bad-block management and ensures 1582 that device writes are sequential regardless of filesystem 1583 activity. 1584 1585config CMD_ZFS 1586 bool "zfs - Access of ZFS filesystem" 1587 help 1588 This provides commands to accessing a ZFS filesystem, commonly used 1589 on Solaris systems. Two sub-commands are provided: 1590 1591 zfsls - list files in a directory 1592 zfsload - load a file 1593 1594 See doc/README.zfs for more details. 1595 1596endmenu 1597 1598menu "Debug commands" 1599 1600config CMD_BEDBUG 1601 bool "bedbug" 1602 help 1603 The bedbug (emBEDded deBUGger) command provides debugging features 1604 for some PowerPC processors. For details please see the 1605 docuemntation in doc/README.beddbug 1606 1607config CMD_DIAG 1608 bool "diag - Board diagnostics" 1609 help 1610 This command provides access to board diagnostic tests. These are 1611 called Power-on Self Tests (POST). The command allows listing of 1612 available tests and running either all the tests, or specific tests 1613 identified by name. 1614 1615config CMD_IRQ 1616 bool "irq - Show information about interrupts" 1617 depends on !ARM && !MIPS && !SH 1618 help 1619 This enables two commands: 1620 1621 interrupts - enable or disable interrupts 1622 irqinfo - print device-specific interrupt information 1623 1624config CMD_KGDB 1625 bool "kgdb - Allow debugging of U-Boot with gdb" 1626 help 1627 This enables a 'kgdb' command which allows gdb to connect to U-Boot 1628 over a serial link for debugging purposes. This allows 1629 single-stepping, inspecting variables, etc. This is supported only 1630 on PowerPC at present. 1631 1632config CMD_LOG 1633 bool "log - Generation, control and access to logging" 1634 help 1635 This provides access to logging features. It allows the output of 1636 log data to be controlled to a limited extent (setting up the default 1637 maximum log level for emitting of records). It also provides access 1638 to a command used for testing the log system. 1639 1640config CMD_TRACE 1641 bool "trace - Support tracing of function calls and timing" 1642 help 1643 Enables a command to control using of function tracing within 1644 U-Boot. This allows recording of call traces including timing 1645 information. The command can write data to memory for exporting 1646 for analsys (e.g. using bootchart). See doc/README.trace for full 1647 details. 1648 1649endmenu 1650 1651config CMD_UBI 1652 tristate "Enable UBI - Unsorted block images commands" 1653 select CRC32 1654 select MTD_UBI 1655 select CMD_MTDPARTS 1656 default y if NAND_SUNXI 1657 help 1658 UBI is a software layer above MTD layer which admits use of LVM-like 1659 logical volumes on top of MTD devices, hides some complexities of 1660 flash chips like wear and bad blocks and provides some other useful 1661 capabilities. Please, consult the MTD web site for more details 1662 (www.linux-mtd.infradead.org). Activate this option if you want 1663 to use U-Boot UBI commands. 1664 1665config CMD_UBIFS 1666 tristate "Enable UBIFS - Unsorted block images filesystem commands" 1667 depends on CMD_UBI 1668 select CRC32 1669 select LZO 1670 default y if CMD_UBI 1671 help 1672 UBIFS is a file system for flash devices which works on top of UBI. 1673 1674endmenu 1675