5 config ANDROID_BOOT_IMAGE
6 bool "Android Boot Images"
9 This enables support for booting images which use the Android
13 bool "Show image date and time when displaying image information"
16 When CONFIG_TIMESTAMP is selected, the timestamp (date and time) of
17 an image is printed by image commands like bootm or iminfo. This
18 is shown as 'Timestamp: xxx' and 'Created: xxx'. If this option is
19 enabled, then U-Boot requires FITs to have a timestamp. If a FIT is
20 loaded that does not, the message 'Wrong FIT format: no timestamp'
24 bool "Support for running a command if a button is held during boot"
28 For many embedded devices it's useful to enter a special flashing mode
29 such as fastboot mode when a button is held during boot. This option
30 allows arbitrary commands to be assigned to specific buttons. These will
31 be run after "preboot" if the button is held. Configuration is done via
32 the environment variables "button_cmd_N_name" and "button_cmd_N" where n is
33 the button number (starting from 0). e.g:
35 "button_cmd_0_name=vol_down"
36 "button_cmd_0=fastboot usb 0"
39 bool "Flattened Image Tree (FIT)"
45 This option allows you to boot the new uImage structure,
46 Flattened Image Tree. FIT is formally a FDT, which can include
47 images of various types (kernel, FDT blob, ramdisk, etc.)
48 in a single blob. To boot this new uImage structure,
49 pass the address of the blob to the "bootm" command.
50 FIT is very flexible, supporting compression, multiple images,
51 multiple configurations, verification through hashing and also
52 verified boot (secure boot using RSA).
56 config FIT_EXTERNAL_OFFSET
57 hex "FIT external data offset"
60 This specifies a data offset in fit image.
61 The offset is from data payload offset to the beginning of
62 fit image header. When specifies a offset, specific data
63 could be put in the hole between data payload and fit image
64 header, such as CSF data on i.MX platform.
67 bool "Do a full check of the FIT before using it"
70 Enable this do a full check of the FIT to make sure it is valid. This
71 helps to protect against carefully crafted FITs which take advantage
72 of bugs or omissions in the code. This includes a bad structure,
73 multiple root nodes and the like.
76 bool "Enable signature verification of FIT uImages"
81 select IMAGE_SIGN_INFO
84 This option enables signature verification of FIT uImages,
85 using a hash signed and verified using RSA. If
86 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
87 hashing is available using hardware, then the RSA library will use
88 it. See doc/uImage.FIT/signature.txt for more details.
90 WARNING: When relying on signed FIT images with a required signature
91 check the legacy image format is disabled by default, so that
92 unsigned images cannot be loaded. If a board needs the legacy image
93 format support in this case, enable it using
94 CONFIG_LEGACY_IMAGE_FORMAT.
96 config FIT_SIGNATURE_MAX_SIZE
97 hex "Max size of signed FIT structures"
98 depends on FIT_SIGNATURE
101 This option sets a max size in bytes for verified FIT uImages.
102 A sane value of 256MB protects corrupted DTB structures from overlapping
103 device memory. Assure this size does not extend past expected storage
106 config FIT_RSASSA_PSS
107 bool "Support rsassa-pss signature scheme of FIT image contents"
108 depends on FIT_SIGNATURE
110 Enable this to support the pss padding algorithm as described
111 in the rfc8017 (https://tools.ietf.org/html/rfc8017).
114 bool "Enable ciphering data in a FIT uImages"
118 Enable the feature of data ciphering/unciphering in the tool mkimage
119 and in the u-boot support of the FIT image.
122 bool "Show verbose messages when FIT images fail"
124 Generally a system will have valid FIT images so debug messages
125 are a waste of code space. If you are debugging your images then
126 you can enable this option to get more verbose information about
129 config FIT_BEST_MATCH
130 bool "Select the best match for the kernel device tree"
132 When no configuration is explicitly selected, default to the
133 one whose fdt's compatibility field best matches that of
134 U-Boot itself. A match is considered "best" if it matches the
135 most specific compatibility entry of U-Boot's fdt's root node.
136 The order of entries in the configuration's fdt is ignored.
138 config FIT_IMAGE_POST_PROCESS
139 bool "Enable post-processing of FIT artifacts after loading by U-Boot"
140 depends on SOCFPGA_SECURE_VAB_AUTH
142 Allows doing any sort of manipulation to blobs after they got extracted
143 from FIT images like stripping off headers or modifying the size of the
144 blob, verification, authentication, decryption etc. in a platform or
145 board specific way. In order to use this feature a platform or board-
146 specific implementation of board_fit_image_post_process() must be
147 provided. Also, anything done during this post-processing step would
148 need to be comprehended in how the images were prepared before being
149 injected into the FIT creation (i.e. the blobs would have been pre-
150 processed before being added to the FIT image).
153 bool "Support FIT printing"
156 Support printing the content of the fitImage in a verbose manner.
159 bool "Support Flattened Image Tree within SPL"
165 bool "Support FIT printing within SPL"
168 Support printing the content of the fitImage in a verbose manner in SPL.
170 config SPL_FIT_FULL_CHECK
171 bool "Do a full check of the FIT before using it"
174 Enable this do a full check of the FIT to make sure it is valid. This
175 helps to protect against carefully crafted FITs which take advantage
176 of bugs or omissions in the code. This includes a bad structure,
177 multiple root nodes and the like.
179 config SPL_FIT_SIGNATURE
180 bool "Enable signature verification of FIT firmware within SPL"
182 depends on SPL_LOAD_FIT || SPL_LOAD_FIT_FULL
189 select SPL_IMAGE_SIGN_INFO
190 select SPL_FIT_FULL_CHECK
192 config SPL_FIT_SIGNATURE_MAX_SIZE
193 hex "Max size of signed FIT structures in SPL"
194 depends on SPL_FIT_SIGNATURE
197 This option sets a max size in bytes for verified FIT uImages.
198 A sane value of 256MB protects corrupted DTB structures from overlapping
199 device memory. Assure this size does not extend past expected storage
202 config SPL_FIT_RSASSA_PSS
203 bool "Support rsassa-pss signature scheme of FIT image contents in SPL"
204 depends on SPL_FIT_SIGNATURE
206 Enable this to support the pss padding algorithm as described
207 in the rfc8017 (https://tools.ietf.org/html/rfc8017) in SPL.
210 bool "Enable SPL loading U-Boot as a FIT (basic fitImage features)"
214 Normally with the SPL framework a legacy image is generated as part
215 of the build. This contains U-Boot along with information as to
216 where it should be loaded. This option instead enables generation
217 of a FIT (Flat Image Tree) which provides more flexibility. In
218 particular it can handle selecting from multiple device tree
219 and passing the correct one to U-Boot.
221 This path has the following limitations:
223 1. "loadables" images, other than FDTs, which do not have a "load"
224 property will not be loaded. This limitation also applies to FPGA
225 images with the correct "compatible" string.
226 2. For FPGA images, the supported "compatible" list is in the
227 doc/uImage.FIT/source_file_format.txt.
228 3. FDTs are only loaded for images with an "os" property of "u-boot".
229 "linux" images are also supported with Falcon boot mode.
231 config SPL_LOAD_FIT_ADDRESS
232 hex "load address of fit image"
233 depends on SPL_LOAD_FIT
236 Specify the load address of the fit image that will be loaded
239 config SPL_LOAD_FIT_APPLY_OVERLAY
240 bool "Enable SPL applying DT overlays from FIT"
241 depends on SPL_LOAD_FIT
242 select OF_LIBFDT_OVERLAY
244 The device tree is loaded from the FIT image. Allow the SPL to
245 also load device-tree overlays from the FIT image an apply them
246 over the device tree.
248 config SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ
249 depends on SPL_LOAD_FIT_APPLY_OVERLAY
251 hex "size of temporary buffer used to load the overlays"
253 The size of the area where the overlays will be loaded and
254 uncompress. Must be at least as large as biggest overlay
257 config SPL_LOAD_FIT_FULL
258 bool "Enable SPL loading U-Boot as a FIT (full fitImage features)"
261 Normally with the SPL framework a legacy image is generated as part
262 of the build. This contains U-Boot along with information as to
263 where it should be loaded. This option instead enables generation
264 of a FIT (Flat Image Tree) which provides more flexibility. In
265 particular it can handle selecting from multiple device tree
266 and passing the correct one to U-Boot.
268 config SPL_FIT_IMAGE_POST_PROCESS
269 bool "Enable post-processing of FIT artifacts after loading by the SPL"
270 depends on SPL_LOAD_FIT
271 default y if TI_SECURE_DEVICE
273 Allows doing any sort of manipulation to blobs after they got extracted
274 from the U-Boot FIT image like stripping off headers or modifying the
275 size of the blob, verification, authentication, decryption etc. in a
276 platform or board specific way. In order to use this feature a platform
277 or board-specific implementation of board_fit_image_post_process() must
278 be provided. Also, anything done during this post-processing step would
279 need to be comprehended in how the images were prepared before being
280 injected into the FIT creation (i.e. the blobs would have been pre-
281 processed before being added to the FIT image).
283 config SPL_FIT_SOURCE
284 string ".its source file for U-Boot FIT image"
287 Specifies a (platform specific) FIT source file to generate the
288 U-Boot FIT image. This could specify further image to load and/or
291 config USE_SPL_FIT_GENERATOR
292 bool "Use a script to generate the .its script"
294 default y if SPL_FIT && ARCH_ZYNQMP
296 config SPL_FIT_GENERATOR
297 string ".its file generator script for U-Boot FIT image"
298 depends on USE_SPL_FIT_GENERATOR
299 default "arch/arm/mach-zynqmp/mkimage_fit_atf.sh" if SPL_LOAD_FIT && ARCH_ZYNQMP
301 Specifies a (platform specific) script file to generate the FIT
302 source file used to build the U-Boot FIT image file. This gets
303 passed a list of supported device tree file stub names to
304 include in the generated image.
309 bool "Support Flattened Image Tree within VPL"
316 bool "Support FIT printing within VPL"
320 Support printing the content of the fitImage in a verbose manner in VPL.
322 config VPL_FIT_FULL_CHECK
323 bool "Do a full check of the FIT before using it"
326 Enable this do a full check of the FIT to make sure it is valid. This
327 helps to protect against carefully crafted FITs which take advantage
328 of bugs or omissions in the code. This includes a bad structure,
329 multiple root nodes and the like.
331 config VPL_FIT_SIGNATURE
332 bool "Enable signature verification of FIT firmware within VPL"
341 select VPL_IMAGE_SIGN_INFO
342 select VPL_FIT_FULL_CHECK
344 config VPL_FIT_SIGNATURE_MAX_SIZE
345 hex "Max size of signed FIT structures in VPL"
346 depends on VPL_FIT_SIGNATURE
349 This option sets a max size in bytes for verified FIT uImages.
350 A sane value of 256MB protects corrupted DTB structures from overlapping
351 device memory. Assure this size does not extend past expected storage
362 Utilities for parsing PXE file formats.
364 config BOOT_DEFAULTS_FEATURES
366 select SUPPORT_RAW_INITRD
367 select ENV_VARS_UBOOT_CONFIG
372 config BOOT_DEFAULTS_CMDS
374 imply USE_BOOTCOMMAND
375 select CMD_ENV_EXISTS
379 select CMD_FS_GENERIC
380 select CMD_PART if PARTITIONS
381 select CMD_DHCP if CMD_NET
382 select CMD_PING if CMD_NET
383 select CMD_PXE if CMD_NET
384 select CMD_BOOTI if ARM64
385 select CMD_BOOTZ if ARM && !ARM64
389 bool # Common defaults for standard boot and distroboot
390 select BOOT_DEFAULTS_FEATURES
391 select BOOT_DEFAULTS_CMDS if CMDLINE
393 These are not required but are commonly needed to support a good
394 selection of booting methods. Enable this to improve the capability
395 of U-Boot to boot various images. Currently much functionality is
396 tied to enabling the command that exercises it.
401 depends on DM && OF_CONTROL && BLK
403 U-Boot supports a standard way of locating something to boot,
404 typically an Operating System such as Linux, provided by a distro such
405 as Arch Linux or Debian. Enable this to support iterating through
406 available bootdevs and using bootmeths to find bootflows suitable for
409 Standard boot is not a standard way of booting, just a framework
410 within U-Boot for supporting all the different ways that exist.
414 - bootdev - a device which can hold a distro (e.g. MMC)
415 - bootmeth - a method to scan a bootdev to find bootflows (owned by
417 - bootflow - a description of how to boot (owned by the distro)
422 bool "Standard boot support in SPL"
423 depends on SPL && SPL_DM && SPL_OF_CONTROL && SPL_BLK
426 This enables standard boot in SPL. This is neeeded so that VBE
427 (Verified Boot for Embedded) can be used, since it depends on standard
428 boot. It is enabled by default since the main purpose of VPL is to
429 handle the firmware part of VBE.
432 bool "Standard boot support in VPL"
433 depends on VPL && VPL_DM && VPL_OF_CONTROL && VPL_BLK
436 This enables standard boot in SPL. This is neeeded so that VBE
437 (Verified Boot for Embedded) can be used, since it depends on standard
438 boot. It is enabled by default since the main purpose of VPL is to
439 handle the firmware part of VBE.
442 bool "Enhanced features for standard boot"
444 imply BOOTSTD_DEFAULTS
446 This enables various useful features for standard boot, which are not
447 essential for operation:
449 - bootdev, bootmeth commands
450 - extra features in the bootflow command
451 - support for selecting the ordering of bootmeths ("bootmeth order")
452 - support for selecting the ordering of bootdevs using the devicetree
453 as well as the "boot_targets" environment variable
455 config BOOTSTD_DEFAULTS
456 bool "Select some common defaults for standard boot"
459 select BOOTMETH_DISTRO
461 These are not required but are commonly needed to support a good
462 selection of booting methods. Enable this to improve the capability
463 of U-Boot to boot various images.
465 config BOOTSTD_BOOTCOMMAND
466 bool "Use bootstd to boot"
467 default y if !DISTRO_DEFAULTS
469 Enable this to select a default boot-command suitable for booting
470 with standard boot. This can be overridden by the board if needed,
471 but the default command should be enough for most boards which use
474 For now this is only selected if distro boot is NOT used, since
475 standard boot does not support all of the features of distro boot
479 bool "Use programmatic boot"
483 Enable this to provide a board_run_command() function which can boot
484 a systen without using commands. If the boot fails, then U-Boot will
487 Note: This currently has many limitations and is not a useful booting
488 solution. Future work will eventually make this a viable option.
490 config BOOTMETH_GLOBAL
493 Add support for global bootmeths. This feature is used by VBE and
494 EFI bootmgr, since they take full control over which bootdevs are
498 bool "Bootdev support for Chromium OS"
499 depends on X86 || ARM || SANDBOX
502 select PARTITION_TYPE_GUID
503 select PARTITION_UUIDS
505 Enables support for booting Chromium OS using bootdevs. This uses the
506 kernel A slot and obtains the kernel command line from the parameters
509 Note that only x86 devices are supported at present.
511 config BOOTMETH_EXTLINUX
512 bool "Bootdev support for extlinux boot"
516 Enables support for extlinux boot using bootdevs. This makes the
517 bootdevs look for a 'extlinux/extlinux.conf' on each filesystem
520 The specification for this filed is here:
522 https://uapi-group.org/specifications/specs/boot_loader_specification/
524 This provides a way to try out standard boot on an existing boot flow.
526 config BOOTMETH_EXTLINUX_PXE
527 bool "Bootdev support for extlinux boot over network"
528 depends on CMD_PXE && CMD_NET && DM_ETH
531 Enables support for extlinux boot using bootdevs. This makes the
532 bootdevs look for a 'extlinux/extlinux.conf' on the tftp server.
534 The specification for this file is here:
536 https://uapi-group.org/specifications/specs/boot_loader_specification/
538 This provides a way to try out standard boot on an existing boot flow.
540 config BOOTMETH_EFILOADER
541 bool "Bootdev support for EFI boot"
542 depends on EFI_BINARY_EXEC
545 Enables support for EFI boot using bootdevs. This makes the
546 bootdevs look for a 'boot<arch>.efi' on each filesystem
547 they scan. The resulting file is booted after enabling U-Boot's
550 The <arch> depends on the architecture of the board:
552 aa64 - aarch64 (ARM 64-bit)
556 riscv32 - RISC-V 32-bit
557 riscv64 - RISC-V 64-bit
559 This provides a way to try out standard boot on an existing boot flow.
561 config BOOTMETH_EFI_BOOTMGR
562 bool "Bootdev support for EFI boot manager"
563 depends on EFI_BOOTMGR
564 select BOOTMETH_GLOBAL
567 Enable booting via the UEFI boot manager. Based on the EFI variables
568 the EFI binary to be launched is determined. To set the EFI variables
569 use the eficonfig command.
572 bool "Bootdev support for Verified Boot for Embedded"
575 select BOOTMETH_GLOBAL
578 Enables support for VBE boot. This is a standard boot method which
579 supports selection of various firmware components, seleciton of an OS to
580 boot as well as updating these using fwupd.
582 config BOOTMETH_DISTRO
583 bool # Options needed to boot any distro
584 select BOOTMETH_SCRIPT if CMDLINE # E.g. Armbian uses scripts
585 select BOOTMETH_EXTLINUX # E.g. Debian uses these
586 select BOOTMETH_EXTLINUX_PXE if CMD_PXE && CMD_NET && DM_ETH
587 select BOOTMETH_EFILOADER if EFI_BINARY_EXEC # E.g. Ubuntu uses this
589 config SPL_BOOTMETH_VBE
590 bool "Bootdev support for Verified Boot for Embedded (SPL)"
591 depends on SPL && FIT
595 Enables support for VBE boot. This is a standard boot method which
596 supports selection of various firmware components, seleciton of an OS to
597 boot as well as updating these using fwupd.
599 config VPL_BOOTMETH_VBE
600 bool "Bootdev support for Verified Boot for Embedded (VPL)"
601 depends on VPL && FIT
605 Enables support for VBE boot. This is a standard boot method which
606 supports selection of various firmware components, seleciton of an OS to
607 boot as well as updating these using fwupd.
611 config BOOTMETH_VBE_REQUEST
612 bool "Support for serving VBE OS requests"
615 Enables support for looking that the requests made by the
616 Operating System being booted. These requests result in additions to
617 the device tree /chosen node, added during the device tree fixup
620 config SPL_BOOTMETH_VBE_REQUEST
621 bool "Support for serving VBE OS requests (SPL)"
624 Enables support for looking that the requests made by the
625 Operating System being booted. These requests result in additions to
626 the device tree /chosen node, added during the device tree fixup
629 This is only useful if you are booting an OS direct from SPL.
631 config BOOTMETH_VBE_SIMPLE
632 bool "Bootdev support for VBE 'simple' method"
635 Enables support for VBE 'simple' boot. This allows updating a single
636 firmware image in boot media such as MMC. It does not support any sort
637 of rollback, recovery or A/B boot.
639 config BOOTMETH_VBE_SIMPLE_OS
640 bool "Bootdev support for VBE 'simple' method OS phase"
643 Enables support for the OS parts of VBE 'simple' boot. This includes
644 fixing up the device tree with the required VBE information, ready
645 for booting into the OS. This option is only enabled for U-Boot
646 proper, since it is the phase where device tree fixups happen.
648 config SPL_BOOTMETH_VBE_SIMPLE
649 bool "Bootdev support for VBE 'simple' method (SPL)"
653 Enables support for VBE 'simple' boot. This allows updating a single
654 firmware image in boot media such as MMC. It does not support any sort
655 of rollback, recovery or A/B boot.
657 config VPL_BOOTMETH_VBE_SIMPLE
658 bool "Bootdev support for VBE 'simple' method (VPL)"
662 Enables support for VBE 'simple' boot. This allows updating a single
663 firmware image in boot media such as MMC. It does not support any sort
664 of rollback, recovery or A/B boot.
666 config SPL_BOOTMETH_VBE_SIMPLE_FW
667 bool "Bootdev support for VBE 'simple' method firmware phase (SPL)"
671 Enables support for the firmware parts of VBE 'simple' boot. This
672 includes an SPL loader which locates the correct U-Boot to boot into.
673 This option should really only be enabled for VPL, since it is the
674 phase where the SPL + U-Boot decision should be made. But for now,
675 SPL does its own FIT-configuration selection.
677 config VPL_BOOTMETH_VBE_SIMPLE_FW
678 bool "Bootdev support for VBE 'simple' method firmware phase (VPL)"
682 Enables support for the firmware parts of VBE 'simple' boot. This
683 includes an SPL loader which locates the correct SPL to boot into.
684 This option enabled for VPL, since it is the phase where the SPL
690 bool "Support for expos - groups of scenes displaying a UI"
692 default y if BOOTMETH_VBE
694 An expo is a way of presenting and collecting information from the
695 user. It consists of a collection of 'scenes' of which only one is
696 presented at a time. An expo is typically used to show a boot menu
697 and allow settings to be changed.
699 The expo can be presented in graphics form using a vidconsole, or in
700 text form on a serial console.
702 config BOOTMETH_SANDBOX
706 This is a sandbox bootmeth driver used for testing. It always returns
707 -ENOTSUPP when attempting to boot.
709 config BOOTMETH_SCRIPT
710 bool "Bootdev support for U-Boot scripts"
711 default y if BOOTSTD_FULL
715 Enables support for booting a distro via a U-Boot script. This makes
716 the bootdevs look for a 'boot/boot.scr' file which can be used to
719 This provides a way to try out standard boot on an existing boot flow.
720 It is not enabled by default to save space.
724 config LEGACY_IMAGE_FORMAT
725 bool "Enable support for the legacy image format"
726 default y if !FIT_SIGNATURE && !TI_SECURE_DEVICE
728 This option enables the legacy image format. It is enabled by
729 default for backward compatibility, unless FIT_SIGNATURE is
730 set where it is disabled so that unsigned images cannot be
731 loaded. If a board needs the legacy image format support in this
732 case, enable it here.
735 bool "Measure boot images and configuration when booting without EFI"
736 depends on HASH && TPM_V2
738 This option enables measurement of the boot process when booting
739 without UEFI . Measurement involves creating cryptographic hashes
740 of the binary images that are booting and storing them in the TPM.
741 In addition, a log of these hashes is stored in memory for the OS
742 to verify the booted images and configuration. Enable this if the
743 OS has configured some memory area for the event log and you intend
744 to use some attestation tools on your system.
747 config MEASURE_DEVICETREE
748 bool "Measure the devicetree image"
749 default y if MEASURED_BOOT
751 On some platforms, the devicetree is not static as it may contain
752 random MAC addresses or other such data that changes each boot.
753 Therefore, it should not be measured into the TPM. In that case,
754 disable the measurement here.
756 config MEASURE_IGNORE_LOG
757 bool "Ignore the existing event log"
759 On platforms that use an event log memory region that persists
760 through system resets and are the first stage bootloader, then
761 this option should be enabled to ignore any existing data in the
762 event log memory region.
763 endif # MEASURED_BOOT
766 hex "Maximum size of a decompresed OS image"
767 depends on CMD_BOOTM || CMD_BOOTI || CMD_BOOTZ || \
768 LEGACY_IMAGE_FORMAT || SPL_LEGACY_IMAGE_FORMAT
769 default 0x4000000 if PPC || ARM64
770 default 0x1000000 if X86 || ARCH_MX6 || ARCH_MX7
773 This is the maximum size of the buffer that is used to decompress the OS
774 image in to if attempting to boot a compressed image.
776 config SUPPORT_RAW_INITRD
777 bool "Enable raw initrd images"
779 Note, defining the SUPPORT_RAW_INITRD allows user to supply
780 kernel with raw initrd images. The syntax is slightly different, the
781 address of the initrd must be augmented by it's size, in the following
782 format: "<initrd address>:<initrd size>".
785 bool "Support booting Chrome OS"
787 Chrome OS requires U-Boot to set up a table indicating the boot mode
788 (e.g. Developer mode) and a few other things. Enable this if you are
789 booting on a Chromebook to avoid getting an error about an invalid
792 config CHROMEOS_VBOOT
793 bool "Support Chrome OS verified boot"
795 This is intended to enable the full Chrome OS verified boot support
796 in U-Boot. It is not actually implemented in the U-Boot source code
797 at present, so this option is always set to 'n'. It allows
798 distinguishing between booting Chrome OS in a basic way (developer
799 mode) and a full boot.
805 bool "Freescale PBL(pre-boot loader) image format support"
806 select SYS_RAMBOOT if PPC
808 Some SoCs use PBL to load RCW and/or pre-initialization instructions.
809 For more details refer to doc/README.pblimage
812 prompt "Freescale PBL (or predecessor) load location"
813 depends on RAMBOOT_PBL || ((TARGET_P1010RDB_PA || TARGET_P1010RDB_PB \
814 || TARGET_P1020RDB_PC || TARGET_P1020RDB_PD || TARGET_P2020RDB) \
818 bool "Freescale PBL (or similar) is found on SD card"
821 bool "Freescale PBL (or similar) is found on SPI flash"
824 bool "Freescale PBL (or similar) is not used in this case"
828 config FSL_FIXED_MMC_LOCATION
829 bool "PBL MMC is at a fixed location"
830 depends on SDCARD && !RAMBOOT_PBL
832 config ESDHC_HC_BLK_ADDR
834 depends on FSL_FIXED_MMC_LOCATION && (ARCH_BSC9131 || ARCH_BSC9132 || ARCH_P1010)
836 In High Capacity SD Cards (> 2 GBytes), the 32-bit source address and
837 code length of these soc specify the memory address in block address
838 format. Block length is fixed to 512 bytes as per the SD High
839 Capacity specification.
841 config SYS_FSL_PBL_PBI
842 string "PBI(pre-boot instructions) commands for the PBL image"
843 depends on RAMBOOT_PBL
845 PBI commands can be used to configure SoC before it starts the execution.
846 Please refer doc/README.pblimage for more details.
848 config SYS_FSL_PBL_RCW
849 string "Aadditional RCW (Power on reset configuration) for the PBL image"
850 depends on RAMBOOT_PBL
852 Enables addition of RCW (Power on reset configuration) in built image.
853 Please refer doc/README.pblimage for more details.
855 config SYS_BOOT_RAMDISK_HIGH
856 depends on CMD_BOOTM || CMD_BOOTI || CMD_BOOTZ
857 depends on !(NIOS2 || SANDBOX || SH || XTENSA)
861 Enable initrd_high functionality. If defined then the initrd_high
862 feature is enabled and the boot* ramdisk subcommand is enabled.
864 endmenu # Boot images
866 config DISTRO_DEFAULTS
867 bool "(deprecated) Script-based booting of Linux distributions"
871 select CMDLINE_EDITING
876 Note: These scripts have been replaced by Standard Boot. Do not use
877 them on new boards. See 'Migrating from distro_boot' at
878 doc/develop/bootstd.rst
880 Select this to enable various options and commands which are suitable
881 for building u-boot for booting general purpose Linux distributions.
886 bool "Boot timing and reporting"
888 Enable recording of boot time while booting. To use it, insert
889 calls to bootstage_mark() with a suitable BOOTSTAGE_ID from
890 bootstage.h. Only a single entry is recorded for each ID. You can
891 give the entry a name with bootstage_mark_name(). You can also
892 record elapsed time in a particular stage using bootstage_start()
893 before starting and bootstage_accum() when finished. Bootstage will
894 add up all the accumulated time and report it.
896 Normally, IDs are defined in bootstage.h but a small number of
897 additional 'user' IDs can be used by passing BOOTSTAGE_ID_ALLOC
900 Calls to show_boot_progress() will also result in log entries but
901 these will not have names.
904 bool "Boot timing and reported in SPL"
905 depends on BOOTSTAGE && SPL
907 Enable recording of boot time in SPL. To make this visible to U-Boot
908 proper, enable BOOTSTAGE_STASH as well. This will stash the timing
909 information when SPL finishes and load it when U-Boot proper starts
913 bool "Boot timing and reported in TPL"
914 depends on BOOTSTAGE && TPL
916 Enable recording of boot time in SPL. To make this visible to U-Boot
917 proper, enable BOOTSTAGE_STASH as well. This will stash the timing
918 information when TPL finishes and load it when U-Boot proper starts
921 config BOOTSTAGE_REPORT
922 bool "Display a detailed boot timing report before booting the OS"
925 Enable output of a boot time report just before the OS is booted.
926 This shows how long it took U-Boot to go through each stage of the
927 boot process. The report looks something like this:
929 Timer summary in microseconds:
932 3,575,678 3,575,678 board_init_f start
933 3,575,695 17 arch_cpu_init A9
934 3,575,777 82 arch_cpu_init done
935 3,659,598 83,821 board_init_r start
936 3,910,375 250,777 main_loop
937 29,916,167 26,005,792 bootm_start
938 30,361,327 445,160 start_kernel
940 config BOOTSTAGE_RECORD_COUNT
941 int "Number of boot stage records to store"
945 This is the size of the bootstage record list and is the maximum
946 number of bootstage records that can be recorded.
948 config SPL_BOOTSTAGE_RECORD_COUNT
949 int "Number of boot stage records to store for SPL"
950 depends on SPL_BOOTSTAGE
953 This is the size of the bootstage record list and is the maximum
954 number of bootstage records that can be recorded.
956 config TPL_BOOTSTAGE_RECORD_COUNT
957 int "Number of boot stage records to store for TPL"
958 depends on TPL_BOOTSTAGE
961 This is the size of the bootstage record list and is the maximum
962 number of bootstage records that can be recorded.
965 bool "Store boot timing information in the OS device tree"
968 Stash the bootstage information in the FDT. A root 'bootstage'
969 node is created with each bootstage id as a child. Each child
970 has a 'name' property and either 'mark' containing the
971 mark time in microseconds, or 'accum' containing the
972 accumulated time for that bootstage id in microseconds.
977 name = "board_init_f";
986 Code in the Linux kernel can find this in /proc/devicetree.
988 config BOOTSTAGE_STASH
989 bool "Stash the boot timing information in memory before booting OS"
992 Some OSes do not support device tree. Bootstage can instead write
993 the boot timing information in a binary format at a given address.
994 This happens through a call to bootstage_stash(), typically in
995 the CPU's cleanup_before_linux() function. You can use the
996 'bootstage stash' and 'bootstage unstash' commands to do this on
999 config BOOTSTAGE_STASH_ADDR
1000 hex "Address to stash boot timing information"
1003 Provide an address which will not be overwritten by the OS when it
1004 starts, so that it can read this information when ready.
1006 config BOOTSTAGE_STASH_SIZE
1007 hex "Size of boot timing stash region"
1010 This should be large enough to hold the bootstage stash. A value of
1011 4096 (4KiB) is normally plenty.
1013 config SHOW_BOOT_PROGRESS
1014 bool "Show boot progress in a board-specific manner"
1016 Defining this option allows to add some board-specific code (calling
1017 a user-provided function show_boot_progress(int) that enables you to
1018 show the system's boot progress on some display (for example, some
1019 LEDs) on your board. At the moment, the following checkpoints are
1022 Legacy uImage format:
1025 1 common/cmd_bootm.c before attempting to boot an image
1026 -1 common/cmd_bootm.c Image header has bad magic number
1027 2 common/cmd_bootm.c Image header has correct magic number
1028 -2 common/cmd_bootm.c Image header has bad checksum
1029 3 common/cmd_bootm.c Image header has correct checksum
1030 -3 common/cmd_bootm.c Image data has bad checksum
1031 4 common/cmd_bootm.c Image data has correct checksum
1032 -4 common/cmd_bootm.c Image is for unsupported architecture
1033 5 common/cmd_bootm.c Architecture check OK
1034 -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi)
1035 6 common/cmd_bootm.c Image Type check OK
1036 -6 common/cmd_bootm.c gunzip uncompression error
1037 -7 common/cmd_bootm.c Unimplemented compression type
1038 7 common/cmd_bootm.c Uncompression OK
1039 8 common/cmd_bootm.c No uncompress/copy overwrite error
1040 -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX)
1042 9 common/image.c Start initial ramdisk verification
1043 -10 common/image.c Ramdisk header has bad magic number
1044 -11 common/image.c Ramdisk header has bad checksum
1045 10 common/image.c Ramdisk header is OK
1046 -12 common/image.c Ramdisk data has bad checksum
1047 11 common/image.c Ramdisk data has correct checksum
1048 12 common/image.c Ramdisk verification complete, start loading
1049 -13 common/image.c Wrong Image Type (not PPC Linux ramdisk)
1050 13 common/image.c Start multifile image verification
1051 14 common/image.c No initial ramdisk, no multifile, continue.
1053 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS
1055 -30 arch/powerpc/lib/board.c Fatal error, hang the system
1056 -31 post/post.c POST test failed, detected by post_output_backlog()
1057 -32 post/post.c POST test failed, detected by post_run_single()
1059 34 common/cmd_doc.c before loading a Image from a DOC device
1060 -35 common/cmd_doc.c Bad usage of "doc" command
1061 35 common/cmd_doc.c correct usage of "doc" command
1062 -36 common/cmd_doc.c No boot device
1063 36 common/cmd_doc.c correct boot device
1064 -37 common/cmd_doc.c Unknown Chip ID on boot device
1065 37 common/cmd_doc.c correct chip ID found, device available
1066 -38 common/cmd_doc.c Read Error on boot device
1067 38 common/cmd_doc.c reading Image header from DOC device OK
1068 -39 common/cmd_doc.c Image header has bad magic number
1069 39 common/cmd_doc.c Image header has correct magic number
1070 -40 common/cmd_doc.c Error reading Image from DOC device
1071 40 common/cmd_doc.c Image header has correct magic number
1072 41 common/cmd_ide.c before loading a Image from a IDE device
1073 -42 common/cmd_ide.c Bad usage of "ide" command
1074 42 common/cmd_ide.c correct usage of "ide" command
1075 -43 common/cmd_ide.c No boot device
1076 43 common/cmd_ide.c boot device found
1077 -44 common/cmd_ide.c Device not available
1078 44 common/cmd_ide.c Device available
1079 -45 common/cmd_ide.c wrong partition selected
1080 45 common/cmd_ide.c partition selected
1081 -46 common/cmd_ide.c Unknown partition table
1082 46 common/cmd_ide.c valid partition table found
1083 -47 common/cmd_ide.c Invalid partition type
1084 47 common/cmd_ide.c correct partition type
1085 -48 common/cmd_ide.c Error reading Image Header on boot device
1086 48 common/cmd_ide.c reading Image Header from IDE device OK
1087 -49 common/cmd_ide.c Image header has bad magic number
1088 49 common/cmd_ide.c Image header has correct magic number
1089 -50 common/cmd_ide.c Image header has bad checksum
1090 50 common/cmd_ide.c Image header has correct checksum
1091 -51 common/cmd_ide.c Error reading Image from IDE device
1092 51 common/cmd_ide.c reading Image from IDE device OK
1093 52 common/cmd_nand.c before loading a Image from a NAND device
1094 -53 common/cmd_nand.c Bad usage of "nand" command
1095 53 common/cmd_nand.c correct usage of "nand" command
1096 -54 common/cmd_nand.c No boot device
1097 54 common/cmd_nand.c boot device found
1098 -55 common/cmd_nand.c Unknown Chip ID on boot device
1099 55 common/cmd_nand.c correct chip ID found, device available
1100 -56 common/cmd_nand.c Error reading Image Header on boot device
1101 56 common/cmd_nand.c reading Image Header from NAND device OK
1102 -57 common/cmd_nand.c Image header has bad magic number
1103 57 common/cmd_nand.c Image header has correct magic number
1104 -58 common/cmd_nand.c Error reading Image from NAND device
1105 58 common/cmd_nand.c reading Image from NAND device OK
1107 -60 common/env_common.c Environment has a bad CRC, using default
1109 64 net/eth.c starting with Ethernet configuration.
1110 -64 net/eth.c no Ethernet found.
1111 65 net/eth.c Ethernet found.
1113 -80 common/cmd_net.c usage wrong
1114 80 common/cmd_net.c before calling net_loop()
1115 -81 common/cmd_net.c some error in net_loop() occurred
1116 81 common/cmd_net.c net_loop() back without error
1117 -82 common/cmd_net.c size == 0 (File with size 0 loaded)
1118 82 common/cmd_net.c trying automatic boot
1119 83 common/cmd_net.c running "source" command
1120 -83 common/cmd_net.c some error in automatic boot or "source" command
1121 84 common/cmd_net.c end without errors
1126 100 common/cmd_bootm.c Kernel FIT Image has correct format
1127 -100 common/cmd_bootm.c Kernel FIT Image has incorrect format
1128 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration
1129 -101 common/cmd_bootm.c Can't get configuration for kernel subimage
1130 102 common/cmd_bootm.c Kernel unit name specified
1131 -103 common/cmd_bootm.c Can't get kernel subimage node offset
1132 103 common/cmd_bootm.c Found configuration node
1133 104 common/cmd_bootm.c Got kernel subimage node offset
1134 -104 common/cmd_bootm.c Kernel subimage hash verification failed
1135 105 common/cmd_bootm.c Kernel subimage hash verification OK
1136 -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture
1137 106 common/cmd_bootm.c Architecture check OK
1138 -106 common/cmd_bootm.c Kernel subimage has wrong type
1139 107 common/cmd_bootm.c Kernel subimage type OK
1140 -107 common/cmd_bootm.c Can't get kernel subimage data/size
1141 108 common/cmd_bootm.c Got kernel subimage data/size
1142 -108 common/cmd_bootm.c Wrong image type (not legacy, FIT)
1143 -109 common/cmd_bootm.c Can't get kernel subimage type
1144 -110 common/cmd_bootm.c Can't get kernel subimage comp
1145 -111 common/cmd_bootm.c Can't get kernel subimage os
1146 -112 common/cmd_bootm.c Can't get kernel subimage load address
1147 -113 common/cmd_bootm.c Image uncompress/copy overwrite error
1149 120 common/image.c Start initial ramdisk verification
1150 -120 common/image.c Ramdisk FIT image has incorrect format
1151 121 common/image.c Ramdisk FIT image has correct format
1152 122 common/image.c No ramdisk subimage unit name, using configuration
1153 -122 common/image.c Can't get configuration for ramdisk subimage
1154 123 common/image.c Ramdisk unit name specified
1155 -124 common/image.c Can't get ramdisk subimage node offset
1156 125 common/image.c Got ramdisk subimage node offset
1157 -125 common/image.c Ramdisk subimage hash verification failed
1158 126 common/image.c Ramdisk subimage hash verification OK
1159 -126 common/image.c Ramdisk subimage for unsupported architecture
1160 127 common/image.c Architecture check OK
1161 -127 common/image.c Can't get ramdisk subimage data/size
1162 128 common/image.c Got ramdisk subimage data/size
1163 129 common/image.c Can't get ramdisk load address
1164 -129 common/image.c Got ramdisk load address
1166 -130 common/cmd_doc.c Incorrect FIT image format
1167 131 common/cmd_doc.c FIT image format OK
1169 -140 common/cmd_ide.c Incorrect FIT image format
1170 141 common/cmd_ide.c FIT image format OK
1172 -150 common/cmd_nand.c Incorrect FIT image format
1173 151 common/cmd_nand.c FIT image format OK
1175 config SPL_SHOW_BOOT_PROGRESS
1176 bool "Show boot progress in a board-specific manner in SPL"
1179 Defining this option allows to add some board-specific code (calling
1180 a user-provided function show_boot_progress(int) that enables you to
1181 show the system's boot progress on some display (for example, some
1182 LEDs) on your board. For details see SHOW_BOOT_PROGRESS.
1189 bool "Support for booting from NOR flash"
1192 Enabling this will make a U-Boot binary that is capable of being
1193 booted via NOR. In this case we will enable certain pinmux early
1194 as the ROM only partially sets up pinmux. We also default to using
1195 NOR for environment.
1198 bool "Support for booting from NAND flash"
1201 Enabling this will make a U-Boot binary that is capable of being
1202 booted via NAND flash. This is not a must, some SoCs need this,
1206 bool "Support for booting from ONENAND"
1209 Enabling this will make a U-Boot binary that is capable of being
1210 booted via ONENAND. This is not a must, some SoCs need this,
1214 bool "Support for booting from QSPI flash"
1216 Enabling this will make a U-Boot binary that is capable of being
1217 booted via QSPI flash. This is not a must, some SoCs need this,
1221 bool "Support for booting from SATA"
1223 Enabling this will make a U-Boot binary that is capable of being
1224 booted via SATA. This is not a must, some SoCs need this,
1228 bool "Support for booting from SD/EMMC"
1230 Enabling this will make a U-Boot binary that is capable of being
1231 booted via SD/EMMC. This is not a must, some SoCs need this,
1235 bool "Support for booting from SD/EMMC and enable QSPI"
1237 Enabling this will make a U-Boot binary that is capable of being
1238 booted via SD/EMMC while enabling QSPI on the platform as well. This
1239 is not a must, some SoCs need this, some not.
1242 bool "Support for booting from SPI flash"
1244 Enabling this will make a U-Boot binary that is capable of being
1245 booted via SPI flash. This is not a must, some SoCs need this,
1250 menu "Autoboot options"
1257 This enables the autoboot. See doc/README.autoboot for detail.
1262 int "delay in seconds before automatically booting"
1265 Delay before automatically running bootcmd;
1266 set to 0 to autoboot with no delay, but you can stop it by key input.
1267 set to -1 to disable autoboot.
1268 set to -2 to autoboot with no delay and not check for abort
1270 If this value is >= 0 then it is also used for the default delay
1271 before starting the default entry in bootmenu. If it is < 0 then
1272 a default value of 10s is used.
1274 See doc/README.autoboot for details.
1276 config AUTOBOOT_KEYED
1277 bool "Stop autobooting via specific input key / string"
1279 This option enables stopping (aborting) of the automatic
1280 boot feature only by issuing a specific input key or
1281 string. If not enabled, any input key will abort the
1282 U-Boot automatic booting process and bring the device
1283 to the U-Boot prompt for user input.
1287 config AUTOBOOT_FLUSH_STDIN
1288 bool "Enable flushing stdin before starting to read the password"
1291 When this option is enabled stdin buffer will be flushed before
1292 starting to read the password.
1293 This can't be enabled for the sandbox as flushing stdin would
1294 break the autoboot unit tests.
1296 config AUTOBOOT_PROMPT
1297 string "Autoboot stop prompt"
1298 default "Autoboot in %d seconds\\n"
1300 This string is displayed before the boot delay selected by
1301 CONFIG_BOOTDELAY starts. If it is not defined there is no
1302 output indicating that autoboot is in progress.
1304 Note that this define is used as the (only) argument to a
1305 printf() call, so it may contain '%' format specifications,
1306 provided that it also includes, sepearated by commas exactly
1307 like in a printf statement, the required arguments. It is
1308 the responsibility of the user to select only such arguments
1309 that are valid in the given context.
1311 config AUTOBOOT_ENCRYPTION
1312 bool "Enable encryption in autoboot stopping"
1314 This option allows a string to be entered into U-Boot to stop the
1316 The behavior depends whether CONFIG_CRYPT_PW from lib is enabled
1318 In case CONFIG_CRYPT_PW is enabled, the string will be forwarded
1319 to the crypt-based functionality and be compared against the
1320 string in the environment variable 'bootstopkeycrypt'.
1321 In case CONFIG_CRYPT_PW is disabled the string itself is hashed
1322 and compared against the hash in the environment variable
1323 'bootstopkeysha256'.
1324 If it matches in either case then boot stops and
1325 a command-line prompt is presented.
1326 This provides a way to ship a secure production device which can also
1327 be accessed at the U-Boot command line.
1329 config AUTOBOOT_SHA256_FALLBACK
1330 bool "Allow fallback from crypt-hashed password to sha256"
1331 depends on AUTOBOOT_ENCRYPTION && CRYPT_PW
1333 This option adds support to fall back from crypt-hashed
1334 passwords to checking a SHA256 hashed password in case the
1335 'bootstopusesha256' environment variable is set to 'true'.
1337 config AUTOBOOT_DELAY_STR
1338 string "Delay autobooting via specific input key / string"
1339 depends on !AUTOBOOT_ENCRYPTION
1341 This option delays the automatic boot feature by issuing
1342 a specific input key or string. If CONFIG_AUTOBOOT_DELAY_STR
1343 or the environment variable "bootdelaykey" is specified
1344 and this string is received from console input before
1345 autoboot starts booting, U-Boot gives a command prompt. The
1346 U-Boot prompt will time out if CONFIG_BOOT_RETRY_TIME is
1347 used, otherwise it never times out.
1349 config AUTOBOOT_STOP_STR
1350 string "Stop autobooting via specific input key / string"
1351 depends on !AUTOBOOT_ENCRYPTION
1353 This option enables stopping (aborting) of the automatic
1354 boot feature only by issuing a specific input key or
1355 string. If CONFIG_AUTOBOOT_STOP_STR or the environment
1356 variable "bootstopkey" is specified and this string is
1357 received from console input before autoboot starts booting,
1358 U-Boot gives a command prompt. The U-Boot prompt never
1359 times out, even if CONFIG_BOOT_RETRY_TIME is used.
1361 config AUTOBOOT_KEYED_CTRLC
1362 bool "Enable Ctrl-C autoboot interruption"
1363 depends on !AUTOBOOT_ENCRYPTION
1365 This option allows for the boot sequence to be interrupted
1366 by ctrl-c, in addition to the "bootdelaykey" and "bootstopkey".
1367 Setting this variable provides an escape sequence from the
1368 limited "password" strings.
1370 config AUTOBOOT_NEVER_TIMEOUT
1371 bool "Make the password entry never time-out"
1372 depends on AUTOBOOT_ENCRYPTION && CRYPT_PW
1374 This option removes the timeout from the password entry
1375 when the user first presses the <Enter> key before entering
1376 any other character.
1378 config AUTOBOOT_STOP_STR_ENABLE
1379 bool "Enable fixed string to stop autobooting"
1380 depends on AUTOBOOT_ENCRYPTION
1382 This option enables the feature to add a fixed stop
1383 string that is defined at compile time.
1384 In every case it will be tried to load the stop
1385 string from the environment.
1386 In case this is enabled and there is no stop string
1387 in the environment, this will be used as default value.
1389 config AUTOBOOT_STOP_STR_CRYPT
1390 string "Stop autobooting via crypt-hashed password"
1391 depends on AUTOBOOT_STOP_STR_ENABLE && CRYPT_PW
1393 This option adds the feature to only stop the autobooting,
1394 and therefore boot into the U-Boot prompt, when the input
1395 string / password matches a values that is hashed via
1396 one of the supported crypt-style password hashing options
1397 and saved in the environment variable "bootstopkeycrypt".
1399 config AUTOBOOT_STOP_STR_SHA256
1400 string "Stop autobooting via SHA256 hashed password"
1401 depends on AUTOBOOT_STOP_STR_ENABLE
1403 This option adds the feature to only stop the autobooting,
1404 and therefore boot into the U-Boot prompt, when the input
1405 string / password matches a values that is encypted via
1406 a SHA256 hash and saved in the environment variable
1407 "bootstopkeysha256". If the value in that variable
1408 includes a ":", the portion prior to the ":" will be treated
1411 endif # AUTOBOOT_KEYED
1415 config AUTOBOOT_USE_MENUKEY
1416 bool "Allow a specify key to run a menu from the environment"
1418 If a specific key is pressed to stop autoboot, then the commands in
1419 the environment variable 'menucmd' are executed before boot starts.
1421 config AUTOBOOT_MENUKEY
1422 int "ASCII value of boot key to show a menu"
1424 depends on AUTOBOOT_USE_MENUKEY
1426 If this key is pressed to stop autoboot, then the commands in the
1427 environment variable 'menucmd' will be executed before boot starts.
1428 For example, 33 means "!" in ASCII, so pressing ! at boot would take
1435 config AUTOBOOT_MENU_SHOW
1436 bool "Show a menu on boot"
1437 depends on CMD_BOOTMENU
1439 This enables the boot menu, controlled by environment variables
1440 defined by the board. The menu starts after running the 'preboot'
1441 environmnent variable (if enabled) and before handling the boot delay.
1442 See doc/usage/cmd/bootmenu.rst for more details.
1444 config BOOTMENU_DISABLE_UBOOT_CONSOLE
1445 bool "Disallow bootmenu to enter the U-Boot console"
1446 depends on AUTOBOOT_MENU_SHOW
1448 If this option is enabled, user can not enter the U-Boot console from
1449 bootmenu. It increases the system security.
1452 bool "Boot retry feature"
1454 Allow for having the U-Boot command prompt time out and attempt
1455 to boot again. If the environment variable "bootretry" is found then
1456 its value is used, otherwise the retry timeout is
1457 CONFIG_BOOT_RETRY_TIME. CONFIG_BOOT_RETRY_MIN is optional and
1458 defaults to CONFIG_BOOT_RETRY_TIME. All times are in seconds.
1460 config BOOT_RETRY_TIME
1461 int "Timeout in seconds before attempting to boot again"
1462 depends on BOOT_RETRY
1464 Time in seconds before the U-Boot prompt will timeout and boot will
1467 config BOOT_RETRY_MIN
1468 int "Minimum timeout in seconds for 'bootretry'"
1469 depends on BOOT_RETRY
1470 default BOOT_RETRY_TIME
1472 The minimum time in seconds that "bootretry" can be set to.
1474 config RESET_TO_RETRY
1475 bool "Reset the board to retry autoboot"
1476 depends on BOOT_RETRY
1478 After the countdown timed out, the board will be reset to restart
1483 menu "Image support"
1485 config IMAGE_PRE_LOAD
1486 bool "Image pre-load support"
1488 Enable an image pre-load stage in the SPL.
1489 This pre-load stage allows to do some manipulation
1490 or check (for example signature check) on an image
1491 before launching it.
1493 config SPL_IMAGE_PRE_LOAD
1494 bool "Image pre-load support within SPL"
1495 depends on SPL && IMAGE_PRE_LOAD
1497 Enable an image pre-load stage in the SPL.
1498 This pre-load stage allows to do some manipulation
1499 or check (for example signature check) on an image
1500 before launching it.
1502 config IMAGE_PRE_LOAD_SIG
1503 bool "Image pre-load signature support"
1504 depends on IMAGE_PRE_LOAD
1505 select FIT_SIGNATURE
1507 select RSA_VERIFY_WITH_PKEY
1509 Enable signature check support in the pre-load stage.
1510 For this feature a very simple header is added before
1511 the image with few fields:
1515 All other information (header size, type of signature,
1516 ...) are provided in the node /image/pre-load/sig of
1519 config SPL_IMAGE_PRE_LOAD_SIG
1520 bool "Image pre-load signature support witin SPL"
1521 depends on SPL_IMAGE_PRE_LOAD && IMAGE_PRE_LOAD_SIG
1522 select SPL_FIT_SIGNATURE
1524 select SPL_RSA_VERIFY_WITH_PKEY
1526 Enable signature check support in the pre-load stage in the SPL.
1527 For this feature a very simple header is added before
1528 the image with few fields:
1532 All other information (header size, type of signature,
1533 ...) are provided in the node /image/pre-load/sig of
1540 menu "Devicetree fixup"
1543 bool "Run a command from environment to set up device tree before boot"
1546 This causes U-Boot to run a command from the environment variable
1547 fdt_fixup before booting into the operating system, which can use the
1548 fdt command to modify the device tree. The device tree is then passed
1551 config OF_BOARD_SETUP
1552 bool "Set up board-specific details in device tree before boot"
1554 This causes U-Boot to call ft_board_setup() before booting into
1555 the Operating System. This function can set up various
1556 board-specific information in the device tree for use by the OS.
1557 The device tree is then passed to the OS.
1559 config OF_SYSTEM_SETUP
1560 bool "Set up system-specific details in device tree before boot"
1562 This causes U-Boot to call ft_system_setup() before booting into
1563 the Operating System. This function can set up various
1564 system-specific information in the device tree for use by the OS.
1565 The device tree is then passed to the OS.
1567 config OF_STDOUT_VIA_ALIAS
1568 bool "Update the device-tree stdout alias from U-Boot"
1570 This uses U-Boot's serial alias from the aliases node to update
1571 the device tree passed to the OS. The "linux,stdout-path" property
1572 in the chosen node is set to point to the correct serial node.
1573 This option currently references CONFIG_CONS_INDEX, which is
1574 incorrect when used with device tree as this option does not
1575 exist / should not be used.
1577 config FDT_FIXUP_PARTITIONS
1578 bool "Overwrite MTD partitions in DTS through defined in 'mtdparts'"
1580 Allow overwriting defined partitions in the device tree blob
1581 using partition info defined in the 'mtdparts' environment
1585 bool "FDT tools for simplefb support"
1587 Enable the fdt tools to manage the simple fb nodes in device tree.
1588 These functions can be used by board to indicate to the OS
1589 the presence of the simple frame buffer with associated reserved
1592 config ARCH_FIXUP_FDT_MEMORY
1593 bool "Enable arch_fixup_memory_banks() call"
1596 Enable FDT memory map syncup before OS boot. This feature can be
1597 used for booting OS with different memory setup where the part of
1598 the memory location should be used for different purpose.
1605 bool "Enable boot arguments"
1607 Provide boot arguments to bootm command. Boot arguments are specified
1608 in CONFIG_BOOTARGS option. Enable this option to be able to specify
1609 CONFIG_BOOTARGS string. If this option is disabled, CONFIG_BOOTARGS
1610 will be undefined and won't take any space in U-Boot image.
1613 string "Boot arguments"
1614 depends on USE_BOOTARGS && !USE_DEFAULT_ENV_FILE
1616 This can be used to pass arguments to the bootm command. The value of
1617 CONFIG_BOOTARGS goes into the environment value "bootargs". Note that
1618 this value will also override the "chosen" node in FDT blob.
1620 config BOOTARGS_SUBST
1621 bool "Support substituting strings in boot arguments"
1623 This allows substituting string values in the boot arguments. These
1624 are applied after the commandline has been built.
1626 One use for this is to insert the root-disk UUID into the command
1627 line where bootargs contains "root=${uuid}"
1629 setenv bootargs "console= root=${uuid}"
1630 # Set the 'uuid' environment variable
1631 part uuid mmc 2:2 uuid
1633 # Command-line substitution will put the real uuid into the
1634 # kernel command line
1637 config USE_BOOTCOMMAND
1638 bool "Enable a default value for bootcmd"
1641 Provide a default value for the bootcmd entry in the environment. If
1642 autoboot is enabled this is what will be run automatically. Enable
1643 this option to be able to specify CONFIG_BOOTCOMMAND as a string. If
1644 this option is disabled, CONFIG_BOOTCOMMAND will be undefined and
1645 won't take any space in U-Boot image.
1648 string "bootcmd value"
1649 depends on USE_BOOTCOMMAND && !USE_DEFAULT_ENV_FILE
1650 default "bootflow scan -lb" if BOOTSTD_DEFAULTS && CMD_BOOTFLOW_FULL
1651 default "bootflow scan" if BOOTSTD_DEFAULTS && !CMD_BOOTFLOW_FULL
1652 default "run distro_bootcmd" if !BOOTSTD_BOOTCOMMAND && DISTRO_DEFAULTS
1654 This is the string of commands that will be used as bootcmd and if
1655 AUTOBOOT is set, automatically run.
1658 bool "Enable preboot"
1661 When this option is enabled, the existence of the environment
1662 variable "preboot" will be checked immediately before starting the
1663 CONFIG_BOOTDELAY countdown and/or running the auto-boot command resp.
1664 entering interactive mode.
1666 This feature is especially useful when "preboot" is automatically
1667 generated or modified. For example, the boot code can modify the
1668 "preboot" when a user holds down a certain combination of keys.
1671 string "preboot default value"
1672 depends on USE_PREBOOT && !USE_DEFAULT_ENV_FILE
1673 default "usb start" if USB_KEYBOARD
1676 This is the default of "preboot" environment variable.
1678 config PREBOOT_DEFINED
1680 default y if PREBOOT != ""
1682 config DEFAULT_FDT_FILE
1683 string "Default fdt file"
1685 This option is used to set the default fdt file to boot OS.
1687 config SAVE_PREV_BL_FDT_ADDR
1689 bool "Saves fdt address, passed by the previous bootloader, to env var"
1691 When u-boot is used as a chain-loaded bootloader (replacing OS kernel),
1692 enable this option to save fdt address, passed by the
1693 previous bootloader for future use.
1694 Address is saved to `prevbl_fdt_addr` environment variable.
1696 If no fdt was provided by previous bootloader, no env variables
1699 config SAVE_PREV_BL_INITRAMFS_START_ADDR
1701 bool "Saves initramfs address, passed by the previous bootloader, to env var"
1703 When u-boot is used as a chain-loaded bootloader(replacing OS kernel),
1704 enable this option to save initramfs address, passed by the
1705 previous bootloader for future use.
1706 Address is saved to `prevbl_initrd_start_addr` environment variable.
1708 If no initramfs was provided by previous bootloader, no env variables
1711 menu "Configuration editor"
1714 bool "Configuration editor"
1717 Provides a way to deal with board configuration and present it to
1718 the user for adjustment.
1720 This is intended to provide both graphical and text-based user
1721 interfaces, but only graphical is support at present.
1723 endmenu # Configuration editor