5 config ANDROID_BOOT_IMAGE
6 bool "Enable support for Android Boot Images"
9 This enables support for booting images which use the Android
13 bool "Support Flattened Image Tree"
19 This option allows you to boot the new uImage structure,
20 Flattened Image Tree. FIT is formally a FDT, which can include
21 images of various types (kernel, FDT blob, ramdisk, etc.)
22 in a single blob. To boot this new uImage structure,
23 pass the address of the blob to the "bootm" command.
24 FIT is very flexible, supporting compression, multiple images,
25 multiple configurations, verification through hashing and also
26 verified boot (secure boot using RSA).
29 bool "Show image date and time when displaying image information"
32 When CONFIG_TIMESTAMP is selected, the timestamp (date and time) of
33 an image is printed by image commands like bootm or iminfo. This
34 is shown as 'Timestamp: xxx' and 'Created: xxx'. If this option is
35 enabled, then U-Boot requires FITs to have a timestamp. If a FIT is
36 loaded that does not, the message 'Wrong FIT format: no timestamp'
39 config FIT_EXTERNAL_OFFSET
40 hex "FIT external data offset"
44 This specifies a data offset in fit image.
45 The offset is from data payload offset to the beginning of
46 fit image header. When specifies a offset, specific data
47 could be put in the hole between data payload and fit image
48 header, such as CSF data on i.MX platform.
51 bool "Do a full check of the FIT before using it"
55 Enable this do a full check of the FIT to make sure it is valid. This
56 helps to protect against carefully crafted FITs which take advantage
57 of bugs or omissions in the code. This includes a bad structure,
58 multiple root nodes and the like.
61 bool "Enable signature verification of FIT uImages"
66 select IMAGE_SIGN_INFO
69 This option enables signature verification of FIT uImages,
70 using a hash signed and verified using RSA. If
71 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
72 hashing is available using hardware, then the RSA library will use
73 it. See doc/uImage.FIT/signature.txt for more details.
75 WARNING: When relying on signed FIT images with a required signature
76 check the legacy image format is disabled by default, so that
77 unsigned images cannot be loaded. If a board needs the legacy image
78 format support in this case, enable it using
79 CONFIG_LEGACY_IMAGE_FORMAT.
81 config FIT_SIGNATURE_MAX_SIZE
82 hex "Max size of signed FIT structures"
83 depends on FIT_SIGNATURE
86 This option sets a max size in bytes for verified FIT uImages.
87 A sane value of 256MB protects corrupted DTB structures from overlapping
88 device memory. Assure this size does not extend past expected storage
92 bool "Support rsassa-pss signature scheme of FIT image contents"
93 depends on FIT_SIGNATURE
95 Enable this to support the pss padding algorithm as described
96 in the rfc8017 (https://tools.ietf.org/html/rfc8017).
99 bool "Enable ciphering data in a FIT uImages"
103 Enable the feature of data ciphering/unciphering in the tool mkimage
104 and in the u-boot support of the FIT image.
107 bool "Show verbose messages when FIT images fail"
110 Generally a system will have valid FIT images so debug messages
111 are a waste of code space. If you are debugging your images then
112 you can enable this option to get more verbose information about
115 config FIT_BEST_MATCH
116 bool "Select the best match for the kernel device tree"
119 When no configuration is explicitly selected, default to the
120 one whose fdt's compatibility field best matches that of
121 U-Boot itself. A match is considered "best" if it matches the
122 most specific compatibility entry of U-Boot's fdt's root node.
123 The order of entries in the configuration's fdt is ignored.
125 config FIT_IMAGE_POST_PROCESS
126 bool "Enable post-processing of FIT artifacts after loading by U-Boot"
128 depends on TI_SECURE_DEVICE || SOCFPGA_SECURE_VAB_AUTH
129 default y if TI_SECURE_DEVICE
131 Allows doing any sort of manipulation to blobs after they got extracted
132 from FIT images like stripping off headers or modifying the size of the
133 blob, verification, authentication, decryption etc. in a platform or
134 board specific way. In order to use this feature a platform or board-
135 specific implementation of board_fit_image_post_process() must be
136 provided. Also, anything done during this post-processing step would
137 need to be comprehended in how the images were prepared before being
138 injected into the FIT creation (i.e. the blobs would have been pre-
139 processed before being added to the FIT image).
142 bool "Support FIT printing"
146 Support printing the content of the fitImage in a verbose manner.
149 bool "Support Flattened Image Tree within SPL"
150 depends on SPL && FIT
155 bool "Support FIT printing within SPL"
158 Support printing the content of the fitImage in a verbose manner in SPL.
160 config SPL_FIT_FULL_CHECK
161 bool "Do a full check of the FIT before using it"
164 Enable this do a full check of the FIT to make sure it is valid. This
165 helps to protect against carefully crafted FITs which take advantage
166 of bugs or omissions in the code. This includes a bad structure,
167 multiple root nodes and the like.
169 config SPL_FIT_SIGNATURE
170 bool "Enable signature verification of FIT firmware within SPL"
172 depends on SPL_LOAD_FIT || SPL_LOAD_FIT_FULL
179 select SPL_IMAGE_SIGN_INFO
180 select SPL_FIT_FULL_CHECK
182 config SPL_FIT_SIGNATURE_MAX_SIZE
183 hex "Max size of signed FIT structures in SPL"
184 depends on SPL_FIT_SIGNATURE
187 This option sets a max size in bytes for verified FIT uImages.
188 A sane value of 256MB protects corrupted DTB structures from overlapping
189 device memory. Assure this size does not extend past expected storage
192 config SPL_FIT_RSASSA_PSS
193 bool "Support rsassa-pss signature scheme of FIT image contents in SPL"
194 depends on SPL_FIT_SIGNATURE
196 Enable this to support the pss padding algorithm as described
197 in the rfc8017 (https://tools.ietf.org/html/rfc8017) in SPL.
200 bool "Enable SPL loading U-Boot as a FIT (basic fitImage features)"
201 depends on SPL && FIT
204 Normally with the SPL framework a legacy image is generated as part
205 of the build. This contains U-Boot along with information as to
206 where it should be loaded. This option instead enables generation
207 of a FIT (Flat Image Tree) which provides more flexibility. In
208 particular it can handle selecting from multiple device tree
209 and passing the correct one to U-Boot.
211 This path has the following limitations:
213 1. "loadables" images, other than FDTs, which do not have a "load"
214 property will not be loaded. This limitation also applies to FPGA
215 images with the correct "compatible" string.
216 2. For FPGA images, the supported "compatible" list is in the
217 doc/uImage.FIT/source_file_format.txt.
218 3. FDTs are only loaded for images with an "os" property of "u-boot".
219 "linux" images are also supported with Falcon boot mode.
221 config SPL_LOAD_FIT_ADDRESS
222 hex "load address of fit image"
223 depends on SPL_LOAD_FIT || SPL_RAM_SUPPORT || TPL_RAM_SUPPORT
226 Specify the load address of the fit image that will be loaded
229 config SPL_LOAD_FIT_APPLY_OVERLAY
230 bool "Enable SPL applying DT overlays from FIT"
231 depends on SPL_LOAD_FIT
232 select OF_LIBFDT_OVERLAY
234 The device tree is loaded from the FIT image. Allow the SPL to
235 also load device-tree overlays from the FIT image an apply them
236 over the device tree.
238 config SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ
239 depends on SPL_LOAD_FIT_APPLY_OVERLAY
241 hex "size of temporary buffer used to load the overlays"
243 The size of the area where the overlays will be loaded and
244 uncompress. Must be at least as large as biggest overlay
247 config SPL_LOAD_FIT_FULL
248 bool "Enable SPL loading U-Boot as a FIT (full fitImage features)"
252 Normally with the SPL framework a legacy image is generated as part
253 of the build. This contains U-Boot along with information as to
254 where it should be loaded. This option instead enables generation
255 of a FIT (Flat Image Tree) which provides more flexibility. In
256 particular it can handle selecting from multiple device tree
257 and passing the correct one to U-Boot.
259 config SPL_FIT_IMAGE_POST_PROCESS
260 bool "Enable post-processing of FIT artifacts after loading by the SPL"
261 depends on SPL_LOAD_FIT
262 default y if TI_SECURE_DEVICE
264 Allows doing any sort of manipulation to blobs after they got extracted
265 from the U-Boot FIT image like stripping off headers or modifying the
266 size of the blob, verification, authentication, decryption etc. in a
267 platform or board specific way. In order to use this feature a platform
268 or board-specific implementation of board_fit_image_post_process() must
269 be provided. Also, anything done during this post-processing step would
270 need to be comprehended in how the images were prepared before being
271 injected into the FIT creation (i.e. the blobs would have been pre-
272 processed before being added to the FIT image).
274 config SPL_FIT_SOURCE
275 string ".its source file for U-Boot FIT image"
278 Specifies a (platform specific) FIT source file to generate the
279 U-Boot FIT image. This could specify further image to load and/or
282 config USE_SPL_FIT_GENERATOR
283 bool "Use a script to generate the .its script"
285 default y if SPL_FIT && ARCH_ZYNQMP
287 config SPL_FIT_GENERATOR
288 string ".its file generator script for U-Boot FIT image"
289 depends on USE_SPL_FIT_GENERATOR
290 default "arch/arm/mach-zynqmp/mkimage_fit_atf.sh" if SPL_LOAD_FIT && ARCH_ZYNQMP
292 Specifies a (platform specific) script file to generate the FIT
293 source file used to build the U-Boot FIT image file. This gets
294 passed a list of supported device tree file stub names to
295 include in the generated image.
300 bool "Support Flattened Image Tree within VPL"
307 bool "Support FIT printing within VPL"
311 Support printing the content of the fitImage in a verbose manner in VPL.
313 config VPL_FIT_FULL_CHECK
314 bool "Do a full check of the FIT before using it"
317 Enable this do a full check of the FIT to make sure it is valid. This
318 helps to protect against carefully crafted FITs which take advantage
319 of bugs or omissions in the code. This includes a bad structure,
320 multiple root nodes and the like.
322 config VPL_FIT_SIGNATURE
323 bool "Enable signature verification of FIT firmware within VPL"
332 select VPL_IMAGE_SIGN_INFO
333 select VPL_FIT_FULL_CHECK
335 config VPL_FIT_SIGNATURE_MAX_SIZE
336 hex "Max size of signed FIT structures in VPL"
337 depends on VPL_FIT_SIGNATURE
340 This option sets a max size in bytes for verified FIT uImages.
341 A sane value of 256MB protects corrupted DTB structures from overlapping
342 device memory. Assure this size does not extend past expected storage
351 Utilities for parsing PXE file formats.
354 bool # Common defaults for standard boot and distroboot
355 imply USE_BOOTCOMMAND
356 select CMD_ENV_EXISTS
360 select CMD_FS_GENERIC
361 select CMD_PART if PARTITIONS
362 select CMD_DHCP if CMD_NET
363 select CMD_PING if CMD_NET
364 select CMD_PXE if CMD_NET
365 select SUPPORT_RAW_INITRD
366 select ENV_VARS_UBOOT_CONFIG
367 select CMD_BOOTI if ARM64
368 select CMD_BOOTZ if ARM && !ARM64
374 These are not required but are commonly needed to support a good
375 selection of booting methods. Enable this to improve the capability
376 of U-Boot to boot various images. Currently much functionality is
377 tied to enabling the command that exercises it.
380 bool "Standard boot support"
382 depends on DM && OF_CONTROL && BLK
384 U-Boot supports a standard way of locating something to boot,
385 typically an Operating System such as Linux, provided by a distro such
386 as Arch Linux or Debian. Enable this to support iterating through
387 available bootdevs and using bootmeths to find bootflows suitable for
390 Standard boot is not a standard way of booting, just a framework
391 within U-Boot for supporting all the different ways that exist.
395 - bootdev - a device which can hold a distro (e.g. MMC)
396 - bootmeth - a method to scan a bootdev to find bootflows (owned by
398 - bootflow - a description of how to boot (owned by the distro)
401 bool "Enhanced features for standard boot"
404 This enables various useful features for standard boot, which are not
405 essential for operation:
407 - bootdev, bootmeth commands
408 - extra features in the bootflow command
409 - support for selecting the ordering of bootmeths ("bootmeth order")
410 - support for selecting the ordering of bootdevs using the devicetree
411 as well as the "boot_targets" environment variable
414 bool "Standard boot support in SPL"
415 depends on SPL && SPL_DM && SPL_OF_CONTROL && SPL_BLK
418 This enables standard boot in SPL. This is neeeded so that VBE
419 (Verified Boot for Embedded) can be used, since it depends on standard
420 boot. It is enabled by default since the main purpose of VPL is to
421 handle the firmware part of VBE.
424 bool "Standard boot support in VPL"
425 depends on VPL && VPL_DM && VPL_OF_CONTROL && VPL_BLK
428 This enables standard boot in SPL. This is neeeded so that VBE
429 (Verified Boot for Embedded) can be used, since it depends on standard
430 boot. It is enabled by default since the main purpose of VPL is to
431 handle the firmware part of VBE.
435 config BOOTSTD_DEFAULTS
436 bool "Select some common defaults for standard boot"
438 imply USE_BOOTCOMMAND
441 These are not required but are commonly needed to support a good
442 selection of booting methods. Enable this to improve the capability
443 of U-Boot to boot various images.
445 config BOOTSTD_BOOTCOMMAND
446 bool "Use bootstd to boot"
447 default y if !DISTRO_DEFAULTS
449 Enable this to select a default boot-command suitable for booting
450 with standard boot. This can be overridden by the board if needed,
451 but the default command should be enough for most boards which use
454 For now this is only selected if distro boot is NOT used, since
455 standard boot does not support all of the features of distro boot
458 config BOOTMETH_GLOBAL
461 Add support for global bootmeths. This feature is used by VBE and
462 EFI bootmgr, since they take full control over which bootdevs are
465 config BOOTMETH_DISTRO
466 bool "Bootdev support for distro boot"
470 Enables support for distro boot using bootdevs. This makes the
471 bootdevs look for a 'extlinux/extlinux.conf' on each filesystem
474 This provides a way to try out standard boot on an existing boot flow.
476 config BOOTMETH_DISTRO_PXE
477 bool "Bootdev support for distro boot over network"
478 depends on CMD_PXE && CMD_NET && DM_ETH
481 Enables support for distro boot using bootdevs. This makes the
482 bootdevs look for a 'extlinux/extlinux.conf' on the tftp server.
484 This provides a way to try out standard boot on an existing boot flow.
486 config BOOTMETH_EFILOADER
487 bool "Bootdev support for EFI boot"
488 depends on CMD_BOOTEFI
491 Enables support for EFI boot using bootdevs. This makes the
492 bootdevs look for a 'boot<arch>.efi' on each filesystem
493 they scan. The resulting file is booted after enabling U-Boot's
496 The <arch> depends on the architecture of the board:
498 aa64 - aarch64 (ARM 64-bit)
502 riscv32 - RISC-V 32-bit
503 riscv64 - RISC-V 64-bit
505 This provides a way to try out standard boot on an existing boot flow.
508 bool "Bootdev support for Verified Boot for Embedded"
511 select BOOTMETH_GLOBAL
514 Enables support for VBE boot. This is a standard boot method which
515 supports selection of various firmware components, seleciton of an OS to
516 boot as well as updating these using fwupd.
518 config SPL_BOOTMETH_VBE
519 bool "Bootdev support for Verified Boot for Embedded (SPL)"
520 depends on SPL && FIT
524 Enables support for VBE boot. This is a standard boot method which
525 supports selection of various firmware components, seleciton of an OS to
526 boot as well as updating these using fwupd.
528 config VPL_BOOTMETH_VBE
529 bool "Bootdev support for Verified Boot for Embedded (VPL)"
530 depends on VPL && FIT
534 Enables support for VBE boot. This is a standard boot method which
535 supports selection of various firmware components, seleciton of an OS to
536 boot as well as updating these using fwupd.
540 config BOOTMETH_VBE_REQUEST
541 bool "Support for serving VBE OS requests"
544 Enables support for looking that the requests made by the
545 Operating System being booted. These requests result in additions to
546 the device tree /chosen node, added during the device tree fixup
549 config SPL_BOOTMETH_VBE_REQUEST
550 bool "Support for serving VBE OS requests (SPL)"
553 Enables support for looking that the requests made by the
554 Operating System being booted. These requests result in additions to
555 the device tree /chosen node, added during the device tree fixup
558 This is only useful if you are booting an OS direct from SPL.
560 config BOOTMETH_VBE_SIMPLE
561 bool "Bootdev support for VBE 'simple' method"
564 Enables support for VBE 'simple' boot. This allows updating a single
565 firmware image in boot media such as MMC. It does not support any sort
566 of rollback, recovery or A/B boot.
568 config BOOTMETH_VBE_SIMPLE_OS
569 bool "Bootdev support for VBE 'simple' method OS phase"
572 Enables support for the OS parts of VBE 'simple' boot. This includes
573 fixing up the device tree with the required VBE information, ready
574 for booting into the OS. This option is only enabled for U-Boot
575 proper, since it is the phase where device tree fixups happen.
577 config SPL_BOOTMETH_VBE_SIMPLE
578 bool "Bootdev support for VBE 'simple' method (SPL)"
582 Enables support for VBE 'simple' boot. This allows updating a single
583 firmware image in boot media such as MMC. It does not support any sort
584 of rollback, recovery or A/B boot.
586 config VPL_BOOTMETH_VBE_SIMPLE
587 bool "Bootdev support for VBE 'simple' method (VPL)"
591 Enables support for VBE 'simple' boot. This allows updating a single
592 firmware image in boot media such as MMC. It does not support any sort
593 of rollback, recovery or A/B boot.
595 config SPL_BOOTMETH_VBE_SIMPLE_FW
596 bool "Bootdev support for VBE 'simple' method firmware phase (SPL)"
600 Enables support for the firmware parts of VBE 'simple' boot. This
601 includes an SPL loader which locates the correct U-Boot to boot into.
602 This option should really only be enabled for VPL, since it is the
603 phase where the SPL + U-Boot decision should be made. But for now,
604 SPL does its own FIT-configuration selection.
606 config VPL_BOOTMETH_VBE_SIMPLE_FW
607 bool "Bootdev support for VBE 'simple' method firmware phase (VPL)"
611 Enables support for the firmware parts of VBE 'simple' boot. This
612 includes an SPL loader which locates the correct SPL to boot into.
613 This option enabled for VPL, since it is the phase where the SPL
619 bool "Support for expos - groups of scenes displaying a UI"
621 default y if BOOTMETH_VBE
623 An expo is a way of presenting and collecting information from the
624 user. It consists of a collection of 'scenes' of which only one is
625 presented at a time. An expo is typically used to show a boot menu
626 and allow settings to be changed.
628 The expo can be presented in graphics form using a vidconsole, or in
629 text form on a serial console.
631 config BOOTMETH_SANDBOX
635 This is a sandbox bootmeth driver used for testing. It always returns
636 -ENOTSUPP when attempting to boot.
638 config BOOTMETH_SCRIPT
639 bool "Bootdev support for U-Boot scripts"
640 default y if BOOTSTD_FULL
642 Enables support for booting a distro via a U-Boot script. This makes
643 the bootdevs look for a 'boot/boot.scr' file which can be used to
646 This provides a way to try out standard boot on an existing boot flow.
647 It is not enabled by default to save space.
651 config LEGACY_IMAGE_FORMAT
652 bool "Enable support for the legacy image format"
653 default y if !FIT_SIGNATURE && !TI_SECURE_DEVICE
655 This option enables the legacy image format. It is enabled by
656 default for backward compatibility, unless FIT_SIGNATURE is
657 set where it is disabled so that unsigned images cannot be
658 loaded. If a board needs the legacy image format support in this
659 case, enable it here.
661 config SUPPORT_RAW_INITRD
662 bool "Enable raw initrd images"
664 Note, defining the SUPPORT_RAW_INITRD allows user to supply
665 kernel with raw initrd images. The syntax is slightly different, the
666 address of the initrd must be augmented by it's size, in the following
667 format: "<initrd address>:<initrd size>".
669 config OF_BOARD_SETUP
670 bool "Set up board-specific details in device tree before boot"
673 This causes U-Boot to call ft_board_setup() before booting into
674 the Operating System. This function can set up various
675 board-specific information in the device tree for use by the OS.
676 The device tree is then passed to the OS.
678 config OF_SYSTEM_SETUP
679 bool "Set up system-specific details in device tree before boot"
682 This causes U-Boot to call ft_system_setup() before booting into
683 the Operating System. This function can set up various
684 system-specific information in the device tree for use by the OS.
685 The device tree is then passed to the OS.
687 config OF_STDOUT_VIA_ALIAS
688 bool "Update the device-tree stdout alias from U-Boot"
691 This uses U-Boot's serial alias from the aliases node to update
692 the device tree passed to the OS. The "linux,stdout-path" property
693 in the chosen node is set to point to the correct serial node.
694 This option currently references CONFIG_CONS_INDEX, which is
695 incorrect when used with device tree as this option does not
696 exist / should not be used.
698 config HAVE_TEXT_BASE
700 depends on !NIOS2 && !XTENSA
705 depends on HAVE_TEXT_BASE
706 default 0x0 if POSITION_INDEPENDENT
707 default 0x80800000 if ARCH_OMAP2PLUS || ARCH_K3
708 default 0x81700000 if MACH_SUNIV
709 default 0x2a000000 if MACH_SUN9I
710 default 0x4a000000 if SUNXI_MINIMUM_DRAM_MB >= 256
711 default 0x42e00000 if SUNXI_MINIMUM_DRAM_MB >= 64
714 The address in memory that U-Boot will be running from, initially.
716 config HAVE_SYS_MONITOR_BASE
718 depends on ARC || MIPS || M68K || NIOS2 || PPC || XTENSA || X86 \
719 || ENV_IS_IN_FLASH || MTD_NOR_FLASH
723 config SYS_MONITOR_BASE
724 depends on HAVE_SYS_MONITOR_BASE
725 hex "Physical start address of boot monitor code"
728 The physical start address of boot monitor code (which is the same as
729 CONFIG_TEXT_BASE when linking) and the same as CFG_SYS_FLASH_BASE
730 when booting from flash.
732 config SPL_SYS_MONITOR_BASE
733 depends on MPC85xx && SPL && HAVE_SYS_MONITOR_BASE
734 hex "Physical start address of SPL monitor code"
735 default SPL_TEXT_BASE
737 config TPL_SYS_MONITOR_BASE
738 depends on MPC85xx && TPL && HAVE_SYS_MONITOR_BASE
739 hex "Physical start address of TPL monitor code"
741 config DYNAMIC_SYS_CLK_FREQ
742 bool "Determine CPU clock frequency at run-time"
744 Implement a get_board_sys_clk function that will determine the CPU
745 clock frequency at run time, rather than define it statically.
748 depends on !DYNAMIC_SYS_CLK_FREQ
749 int "CPU clock frequency"
750 default 125000000 if ARCH_LS1012A
751 default 100000000 if ARCH_P2020 || ARCH_T1024 || ARCH_T1042 || \
752 ARCH_LS1021A || FSL_LSCH2 || FSL_LSCH3
753 default 66666666 if ARCH_P1010 || ARCH_P1020 || ARCH_T4240
754 default 66660000 if ARCH_T2080
755 default 33333333 if RCAR_GEN3
756 default 24000000 if ARCH_EXYNOS
757 default 20000000 if RCAR_GEN2
760 A static value for the CPU frequency. Note that if not required
761 for a given SoC, this can be left at 0.
763 config ARCH_FIXUP_FDT_MEMORY
764 bool "Enable arch_fixup_memory_banks() call"
767 Enable FDT memory map syncup before OS boot. This feature can be
768 used for booting OS with different memory setup where the part of
769 the memory location should be used for different purpose.
772 bool "Support booting Chrome OS"
774 Chrome OS requires U-Boot to set up a table indicating the boot mode
775 (e.g. Developer mode) and a few other things. Enable this if you are
776 booting on a Chromebook to avoid getting an error about an invalid
779 config CHROMEOS_VBOOT
780 bool "Support Chrome OS verified boot"
782 This is intended to enable the full Chrome OS verified boot support
783 in U-Boot. It is not actually implemented in the U-Boot source code
784 at present, so this option is always set to 'n'. It allows
785 distinguishing between booting Chrome OS in a basic way (developer
786 mode) and a full boot.
792 bool "Freescale PBL(pre-boot loader) image format support"
793 select SYS_RAMBOOT if PPC
795 Some SoCs use PBL to load RCW and/or pre-initialization instructions.
796 For more details refer to doc/README.pblimage
799 prompt "Freescale PBL (or predecessor) load location"
800 depends on RAMBOOT_PBL || ((TARGET_P1010RDB_PA || TARGET_P1010RDB_PB \
801 || TARGET_P1020RDB_PC || TARGET_P1020RDB_PD || TARGET_P2020RDB) \
805 bool "Freescale PBL (or similar) is found on SD card"
808 bool "Freescale PBL (or similar) is found on SPI flash"
811 bool "Freescale PBL (or similar) is not used in this case"
815 config FSL_FIXED_MMC_LOCATION
816 bool "PBL MMC is at a fixed location"
817 depends on SDCARD && !RAMBOOT_PBL
819 config ESDHC_HC_BLK_ADDR
821 depends on FSL_FIXED_MMC_LOCATION && (ARCH_BSC9131 || ARCH_BSC9132 || ARCH_P1010)
823 In High Capacity SD Cards (> 2 GBytes), the 32-bit source address and
824 code length of these soc specify the memory address in block address
825 format. Block length is fixed to 512 bytes as per the SD High
826 Capacity specification.
828 config SYS_FSL_PBL_PBI
829 string "PBI(pre-boot instructions) commands for the PBL image"
830 depends on RAMBOOT_PBL
832 PBI commands can be used to configure SoC before it starts the execution.
833 Please refer doc/README.pblimage for more details.
835 config SYS_FSL_PBL_RCW
836 string "Aadditional RCW (Power on reset configuration) for the PBL image"
837 depends on RAMBOOT_PBL
839 Enables addition of RCW (Power on reset configuration) in built image.
840 Please refer doc/README.pblimage for more details.
842 config SYS_BOOT_RAMDISK_HIGH
843 depends on CMD_BOOTM || CMD_BOOTI || CMD_BOOTZ
844 depends on !(NIOS2 || SANDBOX || SH || XTENSA)
848 Enable initrd_high functionality. If defined then the initrd_high
849 feature is enabled and the boot* ramdisk subcommand is enabled.
851 endmenu # Boot images
853 config DISTRO_DEFAULTS
854 bool "Select defaults suitable for booting general purpose Linux distributions"
857 select CMDLINE_EDITING
862 Select this to enable various options and commands which are suitable
863 for building u-boot for booting general purpose Linux distributions.
868 bool "Boot timing and reporting"
870 Enable recording of boot time while booting. To use it, insert
871 calls to bootstage_mark() with a suitable BOOTSTAGE_ID from
872 bootstage.h. Only a single entry is recorded for each ID. You can
873 give the entry a name with bootstage_mark_name(). You can also
874 record elapsed time in a particular stage using bootstage_start()
875 before starting and bootstage_accum() when finished. Bootstage will
876 add up all the accumulated time and report it.
878 Normally, IDs are defined in bootstage.h but a small number of
879 additional 'user' IDs can be used by passing BOOTSTAGE_ID_ALLOC
882 Calls to show_boot_progress() will also result in log entries but
883 these will not have names.
886 bool "Boot timing and reported in SPL"
887 depends on BOOTSTAGE && SPL
889 Enable recording of boot time in SPL. To make this visible to U-Boot
890 proper, enable BOOTSTAGE_STASH as well. This will stash the timing
891 information when SPL finishes and load it when U-Boot proper starts
895 bool "Boot timing and reported in TPL"
896 depends on BOOTSTAGE && TPL
898 Enable recording of boot time in SPL. To make this visible to U-Boot
899 proper, enable BOOTSTAGE_STASH as well. This will stash the timing
900 information when TPL finishes and load it when U-Boot proper starts
903 config BOOTSTAGE_REPORT
904 bool "Display a detailed boot timing report before booting the OS"
907 Enable output of a boot time report just before the OS is booted.
908 This shows how long it took U-Boot to go through each stage of the
909 boot process. The report looks something like this:
911 Timer summary in microseconds:
914 3,575,678 3,575,678 board_init_f start
915 3,575,695 17 arch_cpu_init A9
916 3,575,777 82 arch_cpu_init done
917 3,659,598 83,821 board_init_r start
918 3,910,375 250,777 main_loop
919 29,916,167 26,005,792 bootm_start
920 30,361,327 445,160 start_kernel
922 config BOOTSTAGE_RECORD_COUNT
923 int "Number of boot stage records to store"
927 This is the size of the bootstage record list and is the maximum
928 number of bootstage records that can be recorded.
930 config SPL_BOOTSTAGE_RECORD_COUNT
931 int "Number of boot stage records to store for SPL"
932 depends on SPL_BOOTSTAGE
935 This is the size of the bootstage record list and is the maximum
936 number of bootstage records that can be recorded.
938 config TPL_BOOTSTAGE_RECORD_COUNT
939 int "Number of boot stage records to store for TPL"
940 depends on TPL_BOOTSTAGE
943 This is the size of the bootstage record list and is the maximum
944 number of bootstage records that can be recorded.
947 bool "Store boot timing information in the OS device tree"
950 Stash the bootstage information in the FDT. A root 'bootstage'
951 node is created with each bootstage id as a child. Each child
952 has a 'name' property and either 'mark' containing the
953 mark time in microseconds, or 'accum' containing the
954 accumulated time for that bootstage id in microseconds.
959 name = "board_init_f";
968 Code in the Linux kernel can find this in /proc/devicetree.
970 config BOOTSTAGE_STASH
971 bool "Stash the boot timing information in memory before booting OS"
974 Some OSes do not support device tree. Bootstage can instead write
975 the boot timing information in a binary format at a given address.
976 This happens through a call to bootstage_stash(), typically in
977 the CPU's cleanup_before_linux() function. You can use the
978 'bootstage stash' and 'bootstage unstash' commands to do this on
981 config BOOTSTAGE_STASH_ADDR
982 hex "Address to stash boot timing information"
985 Provide an address which will not be overwritten by the OS when it
986 starts, so that it can read this information when ready.
988 config BOOTSTAGE_STASH_SIZE
989 hex "Size of boot timing stash region"
992 This should be large enough to hold the bootstage stash. A value of
993 4096 (4KiB) is normally plenty.
995 config SHOW_BOOT_PROGRESS
996 bool "Show boot progress in a board-specific manner"
998 Defining this option allows to add some board-specific code (calling
999 a user-provided function show_boot_progress(int) that enables you to
1000 show the system's boot progress on some display (for example, some
1001 LEDs) on your board. At the moment, the following checkpoints are
1004 Legacy uImage format:
1007 1 common/cmd_bootm.c before attempting to boot an image
1008 -1 common/cmd_bootm.c Image header has bad magic number
1009 2 common/cmd_bootm.c Image header has correct magic number
1010 -2 common/cmd_bootm.c Image header has bad checksum
1011 3 common/cmd_bootm.c Image header has correct checksum
1012 -3 common/cmd_bootm.c Image data has bad checksum
1013 4 common/cmd_bootm.c Image data has correct checksum
1014 -4 common/cmd_bootm.c Image is for unsupported architecture
1015 5 common/cmd_bootm.c Architecture check OK
1016 -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi)
1017 6 common/cmd_bootm.c Image Type check OK
1018 -6 common/cmd_bootm.c gunzip uncompression error
1019 -7 common/cmd_bootm.c Unimplemented compression type
1020 7 common/cmd_bootm.c Uncompression OK
1021 8 common/cmd_bootm.c No uncompress/copy overwrite error
1022 -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX)
1024 9 common/image.c Start initial ramdisk verification
1025 -10 common/image.c Ramdisk header has bad magic number
1026 -11 common/image.c Ramdisk header has bad checksum
1027 10 common/image.c Ramdisk header is OK
1028 -12 common/image.c Ramdisk data has bad checksum
1029 11 common/image.c Ramdisk data has correct checksum
1030 12 common/image.c Ramdisk verification complete, start loading
1031 -13 common/image.c Wrong Image Type (not PPC Linux ramdisk)
1032 13 common/image.c Start multifile image verification
1033 14 common/image.c No initial ramdisk, no multifile, continue.
1035 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS
1037 -30 arch/powerpc/lib/board.c Fatal error, hang the system
1038 -31 post/post.c POST test failed, detected by post_output_backlog()
1039 -32 post/post.c POST test failed, detected by post_run_single()
1041 34 common/cmd_doc.c before loading a Image from a DOC device
1042 -35 common/cmd_doc.c Bad usage of "doc" command
1043 35 common/cmd_doc.c correct usage of "doc" command
1044 -36 common/cmd_doc.c No boot device
1045 36 common/cmd_doc.c correct boot device
1046 -37 common/cmd_doc.c Unknown Chip ID on boot device
1047 37 common/cmd_doc.c correct chip ID found, device available
1048 -38 common/cmd_doc.c Read Error on boot device
1049 38 common/cmd_doc.c reading Image header from DOC device OK
1050 -39 common/cmd_doc.c Image header has bad magic number
1051 39 common/cmd_doc.c Image header has correct magic number
1052 -40 common/cmd_doc.c Error reading Image from DOC device
1053 40 common/cmd_doc.c Image header has correct magic number
1054 41 common/cmd_ide.c before loading a Image from a IDE device
1055 -42 common/cmd_ide.c Bad usage of "ide" command
1056 42 common/cmd_ide.c correct usage of "ide" command
1057 -43 common/cmd_ide.c No boot device
1058 43 common/cmd_ide.c boot device found
1059 -44 common/cmd_ide.c Device not available
1060 44 common/cmd_ide.c Device available
1061 -45 common/cmd_ide.c wrong partition selected
1062 45 common/cmd_ide.c partition selected
1063 -46 common/cmd_ide.c Unknown partition table
1064 46 common/cmd_ide.c valid partition table found
1065 -47 common/cmd_ide.c Invalid partition type
1066 47 common/cmd_ide.c correct partition type
1067 -48 common/cmd_ide.c Error reading Image Header on boot device
1068 48 common/cmd_ide.c reading Image Header from IDE device OK
1069 -49 common/cmd_ide.c Image header has bad magic number
1070 49 common/cmd_ide.c Image header has correct magic number
1071 -50 common/cmd_ide.c Image header has bad checksum
1072 50 common/cmd_ide.c Image header has correct checksum
1073 -51 common/cmd_ide.c Error reading Image from IDE device
1074 51 common/cmd_ide.c reading Image from IDE device OK
1075 52 common/cmd_nand.c before loading a Image from a NAND device
1076 -53 common/cmd_nand.c Bad usage of "nand" command
1077 53 common/cmd_nand.c correct usage of "nand" command
1078 -54 common/cmd_nand.c No boot device
1079 54 common/cmd_nand.c boot device found
1080 -55 common/cmd_nand.c Unknown Chip ID on boot device
1081 55 common/cmd_nand.c correct chip ID found, device available
1082 -56 common/cmd_nand.c Error reading Image Header on boot device
1083 56 common/cmd_nand.c reading Image Header from NAND device OK
1084 -57 common/cmd_nand.c Image header has bad magic number
1085 57 common/cmd_nand.c Image header has correct magic number
1086 -58 common/cmd_nand.c Error reading Image from NAND device
1087 58 common/cmd_nand.c reading Image from NAND device OK
1089 -60 common/env_common.c Environment has a bad CRC, using default
1091 64 net/eth.c starting with Ethernet configuration.
1092 -64 net/eth.c no Ethernet found.
1093 65 net/eth.c Ethernet found.
1095 -80 common/cmd_net.c usage wrong
1096 80 common/cmd_net.c before calling net_loop()
1097 -81 common/cmd_net.c some error in net_loop() occurred
1098 81 common/cmd_net.c net_loop() back without error
1099 -82 common/cmd_net.c size == 0 (File with size 0 loaded)
1100 82 common/cmd_net.c trying automatic boot
1101 83 common/cmd_net.c running "source" command
1102 -83 common/cmd_net.c some error in automatic boot or "source" command
1103 84 common/cmd_net.c end without errors
1108 100 common/cmd_bootm.c Kernel FIT Image has correct format
1109 -100 common/cmd_bootm.c Kernel FIT Image has incorrect format
1110 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration
1111 -101 common/cmd_bootm.c Can't get configuration for kernel subimage
1112 102 common/cmd_bootm.c Kernel unit name specified
1113 -103 common/cmd_bootm.c Can't get kernel subimage node offset
1114 103 common/cmd_bootm.c Found configuration node
1115 104 common/cmd_bootm.c Got kernel subimage node offset
1116 -104 common/cmd_bootm.c Kernel subimage hash verification failed
1117 105 common/cmd_bootm.c Kernel subimage hash verification OK
1118 -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture
1119 106 common/cmd_bootm.c Architecture check OK
1120 -106 common/cmd_bootm.c Kernel subimage has wrong type
1121 107 common/cmd_bootm.c Kernel subimage type OK
1122 -107 common/cmd_bootm.c Can't get kernel subimage data/size
1123 108 common/cmd_bootm.c Got kernel subimage data/size
1124 -108 common/cmd_bootm.c Wrong image type (not legacy, FIT)
1125 -109 common/cmd_bootm.c Can't get kernel subimage type
1126 -110 common/cmd_bootm.c Can't get kernel subimage comp
1127 -111 common/cmd_bootm.c Can't get kernel subimage os
1128 -112 common/cmd_bootm.c Can't get kernel subimage load address
1129 -113 common/cmd_bootm.c Image uncompress/copy overwrite error
1131 120 common/image.c Start initial ramdisk verification
1132 -120 common/image.c Ramdisk FIT image has incorrect format
1133 121 common/image.c Ramdisk FIT image has correct format
1134 122 common/image.c No ramdisk subimage unit name, using configuration
1135 -122 common/image.c Can't get configuration for ramdisk subimage
1136 123 common/image.c Ramdisk unit name specified
1137 -124 common/image.c Can't get ramdisk subimage node offset
1138 125 common/image.c Got ramdisk subimage node offset
1139 -125 common/image.c Ramdisk subimage hash verification failed
1140 126 common/image.c Ramdisk subimage hash verification OK
1141 -126 common/image.c Ramdisk subimage for unsupported architecture
1142 127 common/image.c Architecture check OK
1143 -127 common/image.c Can't get ramdisk subimage data/size
1144 128 common/image.c Got ramdisk subimage data/size
1145 129 common/image.c Can't get ramdisk load address
1146 -129 common/image.c Got ramdisk load address
1148 -130 common/cmd_doc.c Incorrect FIT image format
1149 131 common/cmd_doc.c FIT image format OK
1151 -140 common/cmd_ide.c Incorrect FIT image format
1152 141 common/cmd_ide.c FIT image format OK
1154 -150 common/cmd_nand.c Incorrect FIT image format
1155 151 common/cmd_nand.c FIT image format OK
1157 config SPL_SHOW_BOOT_PROGRESS
1158 bool "Show boot progress in a board-specific manner in SPL"
1161 Defining this option allows to add some board-specific code (calling
1162 a user-provided function show_boot_progress(int) that enables you to
1163 show the system's boot progress on some display (for example, some
1164 LEDs) on your board. For details see SHOW_BOOT_PROGRESS.
1171 bool "Support for booting from NOR flash"
1174 Enabling this will make a U-Boot binary that is capable of being
1175 booted via NOR. In this case we will enable certain pinmux early
1176 as the ROM only partially sets up pinmux. We also default to using
1177 NOR for environment.
1180 bool "Support for booting from NAND flash"
1183 Enabling this will make a U-Boot binary that is capable of being
1184 booted via NAND flash. This is not a must, some SoCs need this,
1188 bool "Support for booting from ONENAND"
1191 Enabling this will make a U-Boot binary that is capable of being
1192 booted via ONENAND. This is not a must, some SoCs need this,
1196 bool "Support for booting from QSPI flash"
1198 Enabling this will make a U-Boot binary that is capable of being
1199 booted via QSPI flash. This is not a must, some SoCs need this,
1203 bool "Support for booting from SATA"
1205 Enabling this will make a U-Boot binary that is capable of being
1206 booted via SATA. This is not a must, some SoCs need this,
1210 bool "Support for booting from SD/EMMC"
1212 Enabling this will make a U-Boot binary that is capable of being
1213 booted via SD/EMMC. This is not a must, some SoCs need this,
1217 bool "Support for booting from SD/EMMC and enable QSPI"
1219 Enabling this will make a U-Boot binary that is capable of being
1220 booted via SD/EMMC while enabling QSPI on the platform as well. This
1221 is not a must, some SoCs need this, some not.
1224 bool "Support for booting from SPI flash"
1226 Enabling this will make a U-Boot binary that is capable of being
1227 booted via SPI flash. This is not a must, some SoCs need this,
1232 menu "Autoboot options"
1238 This enables the autoboot. See doc/README.autoboot for detail.
1241 int "delay in seconds before automatically booting"
1245 Delay before automatically running bootcmd;
1246 set to 0 to autoboot with no delay, but you can stop it by key input.
1247 set to -1 to disable autoboot.
1248 set to -2 to autoboot with no delay and not check for abort
1250 If this value is >= 0 then it is also used for the default delay
1251 before starting the default entry in bootmenu. If it is < 0 then
1252 a default value of 10s is used.
1254 See doc/README.autoboot for details.
1256 config AUTOBOOT_KEYED
1257 bool "Stop autobooting via specific input key / string"
1259 This option enables stopping (aborting) of the automatic
1260 boot feature only by issuing a specific input key or
1261 string. If not enabled, any input key will abort the
1262 U-Boot automatic booting process and bring the device
1263 to the U-Boot prompt for user input.
1265 config AUTOBOOT_FLUSH_STDIN
1266 bool "Enable flushing stdin before starting to read the password"
1267 depends on AUTOBOOT_KEYED && !SANDBOX
1269 When this option is enabled stdin buffer will be flushed before
1270 starting to read the password.
1271 This can't be enabled for the sandbox as flushing stdin would
1272 break the autoboot unit tests.
1274 config AUTOBOOT_PROMPT
1275 string "Autoboot stop prompt"
1276 depends on AUTOBOOT_KEYED
1277 default "Autoboot in %d seconds\\n"
1279 This string is displayed before the boot delay selected by
1280 CONFIG_BOOTDELAY starts. If it is not defined there is no
1281 output indicating that autoboot is in progress.
1283 Note that this define is used as the (only) argument to a
1284 printf() call, so it may contain '%' format specifications,
1285 provided that it also includes, sepearated by commas exactly
1286 like in a printf statement, the required arguments. It is
1287 the responsibility of the user to select only such arguments
1288 that are valid in the given context.
1290 config AUTOBOOT_ENCRYPTION
1291 bool "Enable encryption in autoboot stopping"
1292 depends on AUTOBOOT_KEYED
1294 This option allows a string to be entered into U-Boot to stop the
1296 The behavior depends whether CONFIG_CRYPT_PW from lib is enabled
1298 In case CONFIG_CRYPT_PW is enabled, the string will be forwarded
1299 to the crypt-based functionality and be compared against the
1300 string in the environment variable 'bootstopkeycrypt'.
1301 In case CONFIG_CRYPT_PW is disabled the string itself is hashed
1302 and compared against the hash in the environment variable
1303 'bootstopkeysha256'.
1304 If it matches in either case then boot stops and
1305 a command-line prompt is presented.
1306 This provides a way to ship a secure production device which can also
1307 be accessed at the U-Boot command line.
1309 config AUTOBOOT_SHA256_FALLBACK
1310 bool "Allow fallback from crypt-hashed password to sha256"
1311 depends on AUTOBOOT_ENCRYPTION && CRYPT_PW
1313 This option adds support to fall back from crypt-hashed
1314 passwords to checking a SHA256 hashed password in case the
1315 'bootstopusesha256' environment variable is set to 'true'.
1317 config AUTOBOOT_DELAY_STR
1318 string "Delay autobooting via specific input key / string"
1319 depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION
1321 This option delays the automatic boot feature by issuing
1322 a specific input key or string. If CONFIG_AUTOBOOT_DELAY_STR
1323 or the environment variable "bootdelaykey" is specified
1324 and this string is received from console input before
1325 autoboot starts booting, U-Boot gives a command prompt. The
1326 U-Boot prompt will time out if CONFIG_BOOT_RETRY_TIME is
1327 used, otherwise it never times out.
1329 config AUTOBOOT_STOP_STR
1330 string "Stop autobooting via specific input key / string"
1331 depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION
1333 This option enables stopping (aborting) of the automatic
1334 boot feature only by issuing a specific input key or
1335 string. If CONFIG_AUTOBOOT_STOP_STR or the environment
1336 variable "bootstopkey" is specified and this string is
1337 received from console input before autoboot starts booting,
1338 U-Boot gives a command prompt. The U-Boot prompt never
1339 times out, even if CONFIG_BOOT_RETRY_TIME is used.
1341 config AUTOBOOT_KEYED_CTRLC
1342 bool "Enable Ctrl-C autoboot interruption"
1343 depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION
1345 This option allows for the boot sequence to be interrupted
1346 by ctrl-c, in addition to the "bootdelaykey" and "bootstopkey".
1347 Setting this variable provides an escape sequence from the
1348 limited "password" strings.
1350 config AUTOBOOT_NEVER_TIMEOUT
1351 bool "Make the password entry never time-out"
1352 depends on AUTOBOOT_KEYED && AUTOBOOT_ENCRYPTION && CRYPT_PW
1354 This option removes the timeout from the password entry
1355 when the user first presses the <Enter> key before entering
1356 any other character.
1358 config AUTOBOOT_STOP_STR_ENABLE
1359 bool "Enable fixed string to stop autobooting"
1360 depends on AUTOBOOT_KEYED && AUTOBOOT_ENCRYPTION
1362 This option enables the feature to add a fixed stop
1363 string that is defined at compile time.
1364 In every case it will be tried to load the stop
1365 string from the environment.
1366 In case this is enabled and there is no stop string
1367 in the environment, this will be used as default value.
1369 config AUTOBOOT_STOP_STR_CRYPT
1370 string "Stop autobooting via crypt-hashed password"
1371 depends on AUTOBOOT_STOP_STR_ENABLE && CRYPT_PW
1373 This option adds the feature to only stop the autobooting,
1374 and therefore boot into the U-Boot prompt, when the input
1375 string / password matches a values that is hashed via
1376 one of the supported crypt-style password hashing options
1377 and saved in the environment variable "bootstopkeycrypt".
1379 config AUTOBOOT_STOP_STR_SHA256
1380 string "Stop autobooting via SHA256 hashed password"
1381 depends on AUTOBOOT_STOP_STR_ENABLE
1383 This option adds the feature to only stop the autobooting,
1384 and therefore boot into the U-Boot prompt, when the input
1385 string / password matches a values that is encypted via
1386 a SHA256 hash and saved in the environment variable
1387 "bootstopkeysha256". If the value in that variable
1388 includes a ":", the portion prior to the ":" will be treated
1391 config AUTOBOOT_USE_MENUKEY
1392 bool "Allow a specify key to run a menu from the environment"
1393 depends on !AUTOBOOT_KEYED
1395 If a specific key is pressed to stop autoboot, then the commands in
1396 the environment variable 'menucmd' are executed before boot starts.
1398 config AUTOBOOT_MENUKEY
1399 int "ASCII value of boot key to show a menu"
1401 depends on AUTOBOOT_USE_MENUKEY
1403 If this key is pressed to stop autoboot, then the commands in the
1404 environment variable 'menucmd' will be executed before boot starts.
1405 For example, 33 means "!" in ASCII, so pressing ! at boot would take
1408 config AUTOBOOT_MENU_SHOW
1409 bool "Show a menu on boot"
1410 depends on CMD_BOOTMENU
1412 This enables the boot menu, controlled by environment variables
1413 defined by the board. The menu starts after running the 'preboot'
1414 environmnent variable (if enabled) and before handling the boot delay.
1415 See README.bootmenu for more details.
1417 config BOOTMENU_DISABLE_UBOOT_CONSOLE
1418 bool "Disallow bootmenu to enter the U-Boot console"
1419 depends on AUTOBOOT_MENU_SHOW
1421 If this option is enabled, user can not enter the U-Boot console from
1422 bootmenu. It increases the system security.
1425 bool "Boot retry feature"
1427 Allow for having the U-Boot command prompt time out and attempt
1428 to boot again. If the environment variable "bootretry" is found then
1429 its value is used, otherwise the retry timeout is
1430 CONFIG_BOOT_RETRY_TIME. CONFIG_BOOT_RETRY_MIN is optional and
1431 defaults to CONFIG_BOOT_RETRY_TIME. All times are in seconds.
1433 config BOOT_RETRY_TIME
1434 int "Timeout in seconds before attempting to boot again"
1435 depends on BOOT_RETRY
1437 Time in seconds before the U-Boot prompt will timeout and boot will
1440 config BOOT_RETRY_MIN
1441 int "Minimum timeout in seconds for 'bootretry'"
1442 depends on BOOT_RETRY
1443 default BOOT_RETRY_TIME
1445 The minimum time in seconds that "bootretry" can be set to.
1447 config RESET_TO_RETRY
1448 bool "Reset the board to retry autoboot"
1449 depends on BOOT_RETRY
1451 After the countdown timed out, the board will be reset to restart
1456 menu "Image support"
1458 config IMAGE_PRE_LOAD
1459 bool "Image pre-load support"
1461 Enable an image pre-load stage in the SPL.
1462 This pre-load stage allows to do some manipulation
1463 or check (for example signature check) on an image
1464 before launching it.
1466 config SPL_IMAGE_PRE_LOAD
1467 bool "Image pre-load support within SPL"
1468 depends on SPL && IMAGE_PRE_LOAD
1470 Enable an image pre-load stage in the SPL.
1471 This pre-load stage allows to do some manipulation
1472 or check (for example signature check) on an image
1473 before launching it.
1475 config IMAGE_PRE_LOAD_SIG
1476 bool "Image pre-load signature support"
1477 depends on IMAGE_PRE_LOAD
1478 select FIT_SIGNATURE
1480 select RSA_VERIFY_WITH_PKEY
1482 Enable signature check support in the pre-load stage.
1483 For this feature a very simple header is added before
1484 the image with few fields:
1488 All other information (header size, type of signature,
1489 ...) are provided in the node /image/pre-load/sig of
1492 config SPL_IMAGE_PRE_LOAD_SIG
1493 bool "Image pre-load signature support witin SPL"
1494 depends on SPL_IMAGE_PRE_LOAD && IMAGE_PRE_LOAD_SIG
1495 select SPL_FIT_SIGNATURE
1497 select SPL_RSA_VERIFY_WITH_PKEY
1499 Enable signature check support in the pre-load stage in the SPL.
1500 For this feature a very simple header is added before
1501 the image with few fields:
1505 All other information (header size, type of signature,
1506 ...) are provided in the node /image/pre-load/sig of
1512 bool "Enable boot arguments"
1514 Provide boot arguments to bootm command. Boot arguments are specified
1515 in CONFIG_BOOTARGS option. Enable this option to be able to specify
1516 CONFIG_BOOTARGS string. If this option is disabled, CONFIG_BOOTARGS
1517 will be undefined and won't take any space in U-Boot image.
1520 string "Boot arguments"
1521 depends on USE_BOOTARGS && !USE_DEFAULT_ENV_FILE
1523 This can be used to pass arguments to the bootm command. The value of
1524 CONFIG_BOOTARGS goes into the environment value "bootargs". Note that
1525 this value will also override the "chosen" node in FDT blob.
1527 config BOOTARGS_SUBST
1528 bool "Support substituting strings in boot arguments"
1530 This allows substituting string values in the boot arguments. These
1531 are applied after the commandline has been built.
1533 One use for this is to insert the root-disk UUID into the command
1534 line where bootargs contains "root=${uuid}"
1536 setenv bootargs "console= root=${uuid}"
1537 # Set the 'uuid' environment variable
1538 part uuid mmc 2:2 uuid
1540 # Command-line substitution will put the real uuid into the
1541 # kernel command line
1544 config USE_BOOTCOMMAND
1545 bool "Enable a default value for bootcmd"
1547 Provide a default value for the bootcmd entry in the environment. If
1548 autoboot is enabled this is what will be run automatically. Enable
1549 this option to be able to specify CONFIG_BOOTCOMMAND as a string. If
1550 this option is disabled, CONFIG_BOOTCOMMAND will be undefined and
1551 won't take any space in U-Boot image.
1554 string "bootcmd value"
1555 depends on USE_BOOTCOMMAND && !USE_DEFAULT_ENV_FILE
1556 default "bootflow scan -lb" if BOOTSTD_BOOTCOMMAND && CMD_BOOTFLOW_FULL
1557 default "bootflow scan" if BOOTSTD_BOOTCOMMAND && !CMD_BOOTFLOW_FULL
1558 default "run distro_bootcmd" if !BOOTSTD_BOOTCOMMAND && DISTRO_DEFAULTS
1560 This is the string of commands that will be used as bootcmd and if
1561 AUTOBOOT is set, automatically run.
1564 bool "Enable preboot"
1566 When this option is enabled, the existence of the environment
1567 variable "preboot" will be checked immediately before starting the
1568 CONFIG_BOOTDELAY countdown and/or running the auto-boot command resp.
1569 entering interactive mode.
1571 This feature is especially useful when "preboot" is automatically
1572 generated or modified. For example, the boot code can modify the
1573 "preboot" when a user holds down a certain combination of keys.
1576 string "preboot default value"
1577 depends on USE_PREBOOT && !USE_DEFAULT_ENV_FILE
1578 default "usb start" if USB_KEYBOARD
1581 This is the default of "preboot" environment variable.
1583 config PREBOOT_DEFINED
1585 default y if PREBOOT != ""
1587 config DEFAULT_FDT_FILE
1588 string "Default fdt file"
1590 This option is used to set the default fdt file to boot OS.
1592 config SAVE_PREV_BL_FDT_ADDR
1594 bool "Saves fdt address, passed by the previous bootloader, to env var"
1596 When u-boot is used as a chain-loaded bootloader (replacing OS kernel),
1597 enable this option to save fdt address, passed by the
1598 previous bootloader for future use.
1599 Address is saved to `prevbl_fdt_addr` environment variable.
1601 If no fdt was provided by previous bootloader, no env variables
1604 config SAVE_PREV_BL_INITRAMFS_START_ADDR
1606 bool "Saves initramfs address, passed by the previous bootloader, to env var"
1608 When u-boot is used as a chain-loaded bootloader(replacing OS kernel),
1609 enable this option to save initramfs address, passed by the
1610 previous bootloader for future use.
1611 Address is saved to `prevbl_initrd_start_addr` environment variable.
1613 If no initramfs was provided by previous bootloader, no env variables