4 bool "Boot timing and reporting"
6 Enable recording of boot time while booting. To use it, insert
7 calls to bootstage_mark() with a suitable BOOTSTAGE_ID from
8 bootstage.h. Only a single entry is recorded for each ID. You can
9 give the entry a name with bootstage_mark_name(). You can also
10 record elapsed time in a particular stage using bootstage_start()
11 before starting and bootstage_accum() when finished. Bootstage will
12 add up all the accumulated time and report it.
14 Normally, IDs are defined in bootstage.h but a small number of
15 additional 'user' IDs can be used by passing BOOTSTAGE_ID_ALLOC
18 Calls to show_boot_progress() will also result in log entries but
19 these will not have names.
22 bool "Boot timing and reported in SPL"
25 Enable recording of boot time in SPL. To make this visible to U-Boot
26 proper, enable BOOTSTAGE_STASH as well. This will stash the timing
27 information when SPL finishes and load it when U-Boot proper starts
31 bool "Boot timing and reported in TPL"
34 Enable recording of boot time in SPL. To make this visible to U-Boot
35 proper, enable BOOTSTAGE_STASH as well. This will stash the timing
36 information when TPL finishes and load it when U-Boot proper starts
39 config BOOTSTAGE_REPORT
40 bool "Display a detailed boot timing report before booting the OS"
43 Enable output of a boot time report just before the OS is booted.
44 This shows how long it took U-Boot to go through each stage of the
45 boot process. The report looks something like this:
47 Timer summary in microseconds:
50 3,575,678 3,575,678 board_init_f start
51 3,575,695 17 arch_cpu_init A9
52 3,575,777 82 arch_cpu_init done
53 3,659,598 83,821 board_init_r start
54 3,910,375 250,777 main_loop
55 29,916,167 26,005,792 bootm_start
56 30,361,327 445,160 start_kernel
58 config BOOTSTAGE_RECORD_COUNT
59 int "Number of boot stage records to store"
62 This is the size of the bootstage record list and is the maximum
63 number of bootstage records that can be recorded.
65 config SPL_BOOTSTAGE_RECORD_COUNT
66 int "Number of boot stage records to store for SPL"
69 This is the size of the bootstage record list and is the maximum
70 number of bootstage records that can be recorded.
72 config TPL_BOOTSTAGE_RECORD_COUNT
73 int "Number of boot stage records to store for TPL"
76 This is the size of the bootstage record list and is the maximum
77 number of bootstage records that can be recorded.
80 bool "Store boot timing information in the OS device tree"
83 Stash the bootstage information in the FDT. A root 'bootstage'
84 node is created with each bootstage id as a child. Each child
85 has a 'name' property and either 'mark' containing the
86 mark time in microseconds, or 'accum' containing the
87 accumulated time for that bootstage id in microseconds.
92 name = "board_init_f";
101 Code in the Linux kernel can find this in /proc/devicetree.
103 config BOOTSTAGE_STASH
104 bool "Stash the boot timing information in memory before booting OS"
107 Some OSes do not support device tree. Bootstage can instead write
108 the boot timing information in a binary format at a given address.
109 This happens through a call to bootstage_stash(), typically in
110 the CPU's cleanup_before_linux() function. You can use the
111 'bootstage stash' and 'bootstage unstash' commands to do this on
114 config BOOTSTAGE_STASH_ADDR
115 hex "Address to stash boot timing information"
118 Provide an address which will not be overwritten by the OS when it
119 starts, so that it can read this information when ready.
121 config BOOTSTAGE_STASH_SIZE
122 hex "Size of boot timing stash region"
125 This should be large enough to hold the bootstage stash. A value of
126 4096 (4KiB) is normally plenty.
128 config SHOW_BOOT_PROGRESS
129 bool "Show boot progress in a board-specific manner"
131 Defining this option allows to add some board-specific code (calling
132 a user-provided function show_boot_progress(int) that enables you to
133 show the system's boot progress on some display (for example, some
134 LEDs) on your board. At the moment, the following checkpoints are
137 Legacy uImage format:
140 1 common/cmd_bootm.c before attempting to boot an image
141 -1 common/cmd_bootm.c Image header has bad magic number
142 2 common/cmd_bootm.c Image header has correct magic number
143 -2 common/cmd_bootm.c Image header has bad checksum
144 3 common/cmd_bootm.c Image header has correct checksum
145 -3 common/cmd_bootm.c Image data has bad checksum
146 4 common/cmd_bootm.c Image data has correct checksum
147 -4 common/cmd_bootm.c Image is for unsupported architecture
148 5 common/cmd_bootm.c Architecture check OK
149 -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi)
150 6 common/cmd_bootm.c Image Type check OK
151 -6 common/cmd_bootm.c gunzip uncompression error
152 -7 common/cmd_bootm.c Unimplemented compression type
153 7 common/cmd_bootm.c Uncompression OK
154 8 common/cmd_bootm.c No uncompress/copy overwrite error
155 -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX)
157 9 common/image.c Start initial ramdisk verification
158 -10 common/image.c Ramdisk header has bad magic number
159 -11 common/image.c Ramdisk header has bad checksum
160 10 common/image.c Ramdisk header is OK
161 -12 common/image.c Ramdisk data has bad checksum
162 11 common/image.c Ramdisk data has correct checksum
163 12 common/image.c Ramdisk verification complete, start loading
164 -13 common/image.c Wrong Image Type (not PPC Linux ramdisk)
165 13 common/image.c Start multifile image verification
166 14 common/image.c No initial ramdisk, no multifile, continue.
168 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS
170 -30 arch/powerpc/lib/board.c Fatal error, hang the system
171 -31 post/post.c POST test failed, detected by post_output_backlog()
172 -32 post/post.c POST test failed, detected by post_run_single()
174 34 common/cmd_doc.c before loading a Image from a DOC device
175 -35 common/cmd_doc.c Bad usage of "doc" command
176 35 common/cmd_doc.c correct usage of "doc" command
177 -36 common/cmd_doc.c No boot device
178 36 common/cmd_doc.c correct boot device
179 -37 common/cmd_doc.c Unknown Chip ID on boot device
180 37 common/cmd_doc.c correct chip ID found, device available
181 -38 common/cmd_doc.c Read Error on boot device
182 38 common/cmd_doc.c reading Image header from DOC device OK
183 -39 common/cmd_doc.c Image header has bad magic number
184 39 common/cmd_doc.c Image header has correct magic number
185 -40 common/cmd_doc.c Error reading Image from DOC device
186 40 common/cmd_doc.c Image header has correct magic number
187 41 common/cmd_ide.c before loading a Image from a IDE device
188 -42 common/cmd_ide.c Bad usage of "ide" command
189 42 common/cmd_ide.c correct usage of "ide" command
190 -43 common/cmd_ide.c No boot device
191 43 common/cmd_ide.c boot device found
192 -44 common/cmd_ide.c Device not available
193 44 common/cmd_ide.c Device available
194 -45 common/cmd_ide.c wrong partition selected
195 45 common/cmd_ide.c partition selected
196 -46 common/cmd_ide.c Unknown partition table
197 46 common/cmd_ide.c valid partition table found
198 -47 common/cmd_ide.c Invalid partition type
199 47 common/cmd_ide.c correct partition type
200 -48 common/cmd_ide.c Error reading Image Header on boot device
201 48 common/cmd_ide.c reading Image Header from IDE device OK
202 -49 common/cmd_ide.c Image header has bad magic number
203 49 common/cmd_ide.c Image header has correct magic number
204 -50 common/cmd_ide.c Image header has bad checksum
205 50 common/cmd_ide.c Image header has correct checksum
206 -51 common/cmd_ide.c Error reading Image from IDE device
207 51 common/cmd_ide.c reading Image from IDE device OK
208 52 common/cmd_nand.c before loading a Image from a NAND device
209 -53 common/cmd_nand.c Bad usage of "nand" command
210 53 common/cmd_nand.c correct usage of "nand" command
211 -54 common/cmd_nand.c No boot device
212 54 common/cmd_nand.c boot device found
213 -55 common/cmd_nand.c Unknown Chip ID on boot device
214 55 common/cmd_nand.c correct chip ID found, device available
215 -56 common/cmd_nand.c Error reading Image Header on boot device
216 56 common/cmd_nand.c reading Image Header from NAND device OK
217 -57 common/cmd_nand.c Image header has bad magic number
218 57 common/cmd_nand.c Image header has correct magic number
219 -58 common/cmd_nand.c Error reading Image from NAND device
220 58 common/cmd_nand.c reading Image from NAND device OK
222 -60 common/env_common.c Environment has a bad CRC, using default
224 64 net/eth.c starting with Ethernet configuration.
225 -64 net/eth.c no Ethernet found.
226 65 net/eth.c Ethernet found.
228 -80 common/cmd_net.c usage wrong
229 80 common/cmd_net.c before calling net_loop()
230 -81 common/cmd_net.c some error in net_loop() occurred
231 81 common/cmd_net.c net_loop() back without error
232 -82 common/cmd_net.c size == 0 (File with size 0 loaded)
233 82 common/cmd_net.c trying automatic boot
234 83 common/cmd_net.c running "source" command
235 -83 common/cmd_net.c some error in automatic boot or "source" command
236 84 common/cmd_net.c end without errors
241 100 common/cmd_bootm.c Kernel FIT Image has correct format
242 -100 common/cmd_bootm.c Kernel FIT Image has incorrect format
243 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration
244 -101 common/cmd_bootm.c Can't get configuration for kernel subimage
245 102 common/cmd_bootm.c Kernel unit name specified
246 -103 common/cmd_bootm.c Can't get kernel subimage node offset
247 103 common/cmd_bootm.c Found configuration node
248 104 common/cmd_bootm.c Got kernel subimage node offset
249 -104 common/cmd_bootm.c Kernel subimage hash verification failed
250 105 common/cmd_bootm.c Kernel subimage hash verification OK
251 -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture
252 106 common/cmd_bootm.c Architecture check OK
253 -106 common/cmd_bootm.c Kernel subimage has wrong type
254 107 common/cmd_bootm.c Kernel subimage type OK
255 -107 common/cmd_bootm.c Can't get kernel subimage data/size
256 108 common/cmd_bootm.c Got kernel subimage data/size
257 -108 common/cmd_bootm.c Wrong image type (not legacy, FIT)
258 -109 common/cmd_bootm.c Can't get kernel subimage type
259 -110 common/cmd_bootm.c Can't get kernel subimage comp
260 -111 common/cmd_bootm.c Can't get kernel subimage os
261 -112 common/cmd_bootm.c Can't get kernel subimage load address
262 -113 common/cmd_bootm.c Image uncompress/copy overwrite error
264 120 common/image.c Start initial ramdisk verification
265 -120 common/image.c Ramdisk FIT image has incorrect format
266 121 common/image.c Ramdisk FIT image has correct format
267 122 common/image.c No ramdisk subimage unit name, using configuration
268 -122 common/image.c Can't get configuration for ramdisk subimage
269 123 common/image.c Ramdisk unit name specified
270 -124 common/image.c Can't get ramdisk subimage node offset
271 125 common/image.c Got ramdisk subimage node offset
272 -125 common/image.c Ramdisk subimage hash verification failed
273 126 common/image.c Ramdisk subimage hash verification OK
274 -126 common/image.c Ramdisk subimage for unsupported architecture
275 127 common/image.c Architecture check OK
276 -127 common/image.c Can't get ramdisk subimage data/size
277 128 common/image.c Got ramdisk subimage data/size
278 129 common/image.c Can't get ramdisk load address
279 -129 common/image.c Got ramdisk load address
281 -130 common/cmd_doc.c Incorrect FIT image format
282 131 common/cmd_doc.c FIT image format OK
284 -140 common/cmd_ide.c Incorrect FIT image format
285 141 common/cmd_ide.c FIT image format OK
287 -150 common/cmd_nand.c Incorrect FIT image format
288 151 common/cmd_nand.c FIT image format OK
295 bool "Support for booting from NOR flash"
298 Enabling this will make a U-Boot binary that is capable of being
299 booted via NOR. In this case we will enable certain pinmux early
300 as the ROM only partially sets up pinmux. We also default to using
304 bool "Support for booting from NAND flash"
308 Enabling this will make a U-Boot binary that is capable of being
309 booted via NAND flash. This is not a must, some SoCs need this,
313 bool "Support for booting from ONENAND"
317 Enabling this will make a U-Boot binary that is capable of being
318 booted via ONENAND. This is not a must, some SoCs need this,
322 bool "Support for booting from QSPI flash"
325 Enabling this will make a U-Boot binary that is capable of being
326 booted via QSPI flash. This is not a must, some SoCs need this,
330 bool "Support for booting from SATA"
333 Enabling this will make a U-Boot binary that is capable of being
334 booted via SATA. This is not a must, some SoCs need this,
338 bool "Support for booting from SD/EMMC"
341 Enabling this will make a U-Boot binary that is capable of being
342 booted via SD/EMMC. This is not a must, some SoCs need this,
346 bool "Support for booting from SPI flash"
349 Enabling this will make a U-Boot binary that is capable of being
350 booted via SPI flash. This is not a must, some SoCs need this,
356 int "delay in seconds before automatically booting"
360 Delay before automatically running bootcmd;
361 set to 0 to autoboot with no delay, but you can stop it by key input.
362 set to -1 to disable autoboot.
363 set to -2 to autoboot with no delay and not check for abort
365 If this value is >= 0 then it is also used for the default delay
366 before starting the default entry in bootmenu. If it is < 0 then
367 a default value of 10s is used.
369 See doc/README.autoboot for details.
372 bool "Enable boot arguments"
374 Provide boot arguments to bootm command. Boot arguments are specified
375 in CONFIG_BOOTARGS option. Enable this option to be able to specify
376 CONFIG_BOOTARGS string. If this option is disabled, CONFIG_BOOTARGS
377 will be undefined and won't take any space in U-Boot image.
380 string "Boot arguments"
381 depends on USE_BOOTARGS
383 This can be used to pass arguments to the bootm command. The value of
384 CONFIG_BOOTARGS goes into the environment value "bootargs". Note that
385 this value will also override the "chosen" node in FDT blob.
387 config USE_BOOTCOMMAND
388 bool "Enable a default value for bootcmd"
390 Provide a default value for the bootcmd entry in the environment. If
391 autoboot is enabled this is what will be run automatically. Enable
392 this option to be able to specify CONFIG_BOOTCOMMAND as a string. If
393 this option is disabled, CONFIG_BOOTCOMMAND will be undefined and
394 won't take any space in U-Boot image.
397 string "bootcmd value"
398 depends on USE_BOOTCOMMAND
399 default "run distro_bootcmd" if DISTRO_DEFAULTS
401 This is the string of commands that will be used as bootcmd and if
402 AUTOBOOT is set, automatically run.
405 bool "Enable preboot"
407 When this option is enabled, the existence of the environment
408 variable "preboot" will be checked immediately before starting the
409 CONFIG_BOOTDELAY countdown and/or running the auto-boot command resp.
410 entering interactive mode.
412 This feature is especially useful when "preboot" is automatically
413 generated or modified. For example, the boot code can modify the
414 "preboot" when a user holds down a certain combination of keys.
417 string "preboot default value"
418 depends on USE_PREBOOT
421 This is the default of "preboot" environment variable.
428 This is the library functionality to provide a text-based menu of
429 choices for the user to make choices with.
431 config CONSOLE_RECORD
432 bool "Console recording"
434 This provides a way to record console output (and provide console
435 input) through circular buffers. This is mostly useful for testing.
436 Console output is recorded even when the console is silent.
437 To enable console recording, call console_record_reset_enable()
440 config CONSOLE_RECORD_OUT_SIZE
441 hex "Output buffer size"
442 depends on CONSOLE_RECORD
443 default 0x400 if CONSOLE_RECORD
445 Set the size of the console output buffer. When this fills up, no
446 more data will be recorded until some is removed. The buffer is
447 allocated immediately after the malloc() region is ready.
449 config CONSOLE_RECORD_IN_SIZE
450 hex "Input buffer size"
451 depends on CONSOLE_RECORD
452 default 0x100 if CONSOLE_RECORD
454 Set the size of the console input buffer. When this contains data,
455 tstc() and getc() will use this in preference to real device input.
456 The buffer is allocated immediately after the malloc() region is
459 config DISABLE_CONSOLE
460 bool "Add functionality to disable console completely"
462 Disable console (in & out).
465 string "Board specific string to be added to uboot version string"
467 This options adds the board specific name to u-boot version.
474 All Messages with a loglevel smaller than the console loglevel will
475 be compiled in. The loglevels are defined as follows:
486 9 - debug hardware I/O
496 config SILENT_CONSOLE
497 bool "Support a silent console"
499 This option allows the console to be silenced, meaning that no
500 output will appear on the console devices. This is controlled by
501 setting the environment variable 'silent' to a non-empty value.
502 Note this also silences the console when booting Linux.
504 When the console is set up, the variable is checked, and the
505 GD_FLG_SILENT flag is set. Changing the environment variable later
506 will update the flag.
508 config SILENT_U_BOOT_ONLY
509 bool "Only silence the U-Boot console"
510 depends on SILENT_CONSOLE
512 Normally when the U-Boot console is silenced, Linux's console is
513 also silenced (assuming the board boots into Linux). This option
514 allows the linux console to operate normally, even if U-Boot's
517 config SILENT_CONSOLE_UPDATE_ON_SET
518 bool "Changes to the 'silent' environment variable update immediately"
519 depends on SILENT_CONSOLE
520 default y if SILENT_CONSOLE
522 When the 'silent' environment variable is changed, update the
523 console silence flag immediately. This allows 'setenv' to be used
524 to silence or un-silence the console.
526 The effect is that any change to the variable will affect the
529 config SILENT_CONSOLE_UPDATE_ON_RELOC
530 bool "Allow flags to take effect on relocation"
531 depends on SILENT_CONSOLE
533 In some cases the environment is not available until relocation
534 (e.g. NAND). This option makes the value of the 'silent'
535 environment variable take effect at relocation.
537 config PRE_CONSOLE_BUFFER
538 bool "Buffer characters before the console is available"
540 Prior to the console being initialised (i.e. serial UART
541 initialised etc) all console output is silently discarded.
542 Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to
543 buffer any console messages prior to the console being
544 initialised to a buffer. The buffer is a circular buffer, so
545 if it overflows, earlier output is discarded.
547 Note that this is not currently supported in SPL. It would be
548 useful to be able to share the pre-console buffer with SPL.
550 config PRE_CON_BUF_SZ
551 int "Sets the size of the pre-console buffer"
552 depends on PRE_CONSOLE_BUFFER
555 The size of the pre-console buffer affects how much console output
556 can be held before it overflows and starts discarding earlier
557 output. Normally there is very little output at this early stage,
558 unless debugging is enabled, so allow enough for ~10 lines of
561 This is a useful feature if you are using a video console and
562 want to see the full boot output on the console. Without this
563 option only the post-relocation output will be displayed.
565 config PRE_CON_BUF_ADDR
566 hex "Address of the pre-console buffer"
567 depends on PRE_CONSOLE_BUFFER
568 default 0x2f000000 if ARCH_SUNXI && MACH_SUN9I
569 default 0x4f000000 if ARCH_SUNXI && !MACH_SUN9I
570 default 0x0f000000 if ROCKCHIP_RK3288
571 default 0x0f200000 if ROCKCHIP_RK3399
573 This sets the start address of the pre-console buffer. This must
574 be in available memory and is accessed before relocation and
575 possibly before DRAM is set up. Therefore choose an address
578 We should consider removing this option and allocating the memory
579 in board_init_f_init_reserve() instead.
582 bool "Enable console multiplexing"
583 default y if DM_VIDEO || VIDEO || LCD
585 This allows multiple devices to be used for each console 'file'.
586 For example, stdout can be set to go to serial and video.
587 Similarly, stdin can be set to come from serial and keyboard.
588 Input can be provided from either source. Console multiplexing
589 adds a small amount of size to U-Boot. Changes to the environment
590 variables stdout, stdin and stderr will take effect immediately.
592 config SYS_CONSOLE_IS_IN_ENV
593 bool "Select console devices from the environment"
594 default y if CONSOLE_MUX
596 This allows multiple input/output devices to be set at boot time.
597 For example, if stdout is set to "serial,video" then output will
598 be sent to both the serial and video devices on boot. The
599 environment variables can be updated after boot to change the
600 input/output devices.
602 config SYS_CONSOLE_OVERWRITE_ROUTINE
603 bool "Allow board control over console overwriting"
605 If this is enabled, and the board-specific function
606 overwrite_console() returns 1, the stdin, stderr and stdout are
607 switched to the serial port, else the settings in the environment
608 are used. If this is not enabled, the console will not be switched
611 config SYS_CONSOLE_ENV_OVERWRITE
612 bool "Update environment variables during console init"
614 The console environment variables (stdout, stdin, stderr) can be
615 used to determine the correct console devices on start-up. This
616 option writes the console devices to these variables on console
617 start-up (after relocation). This causes the environment to be
618 updated to match the console devices actually chosen.
620 config SYS_CONSOLE_INFO_QUIET
621 bool "Don't display the console devices on boot"
623 Normally U-Boot displays the current settings for stdout, stdin
624 and stderr on boot when the post-relocation console is set up.
625 Enable this option to suppress this output. It can be obtained by
626 calling stdio_print_current_devices() from board code.
628 config SYS_STDIO_DEREGISTER
629 bool "Allow deregistering stdio devices"
630 default y if USB_KEYBOARD
632 Generally there is no need to deregister stdio devices since they
633 are never deactivated. But if a stdio device is used which can be
634 removed (for example a USB keyboard) then this option can be
635 enabled to ensure this is handled correctly.
642 bool "Enable logging support"
645 This enables support for logging of status and debug messages. These
646 can be displayed on the console, recorded in a memory buffer, or
647 discarded if not needed. Logging supports various categories and
651 bool "Enable logging support in SPL"
654 This enables support for logging of status and debug messages. These
655 can be displayed on the console, recorded in a memory buffer, or
656 discarded if not needed. Logging supports various categories and
660 bool "Enable logging support in TPL"
663 This enables support for logging of status and debug messages. These
664 can be displayed on the console, recorded in a memory buffer, or
665 discarded if not needed. Logging supports various categories and
669 int "Maximum log level to record"
673 This selects the maximum log level that will be recorded. Any value
674 higher than this will be ignored. If possible log statements below
675 this level will be discarded at build time. Levels:
686 9 - debug hardware I/O
688 config SPL_LOG_MAX_LEVEL
689 int "Maximum log level to record in SPL"
693 This selects the maximum log level that will be recorded. Any value
694 higher than this will be ignored. If possible log statements below
695 this level will be discarded at build time. Levels:
706 9 - debug hardware I/O
708 config TPL_LOG_MAX_LEVEL
709 int "Maximum log level to record in TPL"
713 This selects the maximum log level that will be recorded. Any value
714 higher than this will be ignored. If possible log statements below
715 this level will be discarded at build time. Levels:
726 9 - debug hardware I/O
728 config LOG_DEFAULT_LEVEL
729 int "Default logging level to display"
732 This is the default logging level set when U-Boot starts. It can
733 be adjusted later using the 'log level' command. Note that setting
734 this to a value above LOG_MAX_LEVEL will be ineffective, since the
735 higher levels are not compiled in to U-Boot.
746 9 - debug hardware I/O
749 bool "Allow log output to the console"
753 Enables a log driver which writes log records to the console.
754 Generally the console is the serial port or LCD display. Only the
755 log message is shown - other details like level, category, file and
756 line number are omitted.
758 config SPL_LOG_CONSOLE
759 bool "Allow log output to the console in SPL"
763 Enables a log driver which writes log records to the console.
764 Generally the console is the serial port or LCD display. Only the
765 log message is shown - other details like level, category, file and
766 line number are omitted.
768 config TPL_LOG_CONSOLE
769 bool "Allow log output to the console in TPL"
773 Enables a log driver which writes log records to the console.
774 Generally the console is the serial port or LCD display. Only the
775 log message is shown - other details like level, category, file and
776 line number are omitted.
779 bool "Log output to syslog server"
780 depends on LOG && NET
782 Enables a log driver which broadcasts log records via UDP port 514
786 bool "Provide a test for logging"
787 depends on LOG && UNIT_TEST
790 This enables a 'log test' command to test logging. It is normally
791 executed from a pytest and simply outputs logging information
792 in various different ways to test that the logging system works
793 correctly with various settings.
795 config LOG_ERROR_RETURN
796 bool "Log all functions which return an error"
799 When an error is returned in U-Boot it is sometimes difficult to
800 figure out the root cause. For example, reading from SPI flash may
801 fail due to a problem in the SPI controller or due to the flash part
802 not returning the expected information. This option changes
803 log_ret() to log any errors it sees. With this option disabled,
806 You can add log_ret() to all functions which return an error code.
810 config SUPPORT_RAW_INITRD
811 bool "Enable raw initrd images"
813 Note, defining the SUPPORT_RAW_INITRD allows user to supply
814 kernel with raw initrd images. The syntax is slightly different, the
815 address of the initrd must be augmented by it's size, in the following
816 format: "<initrd address>:<initrd size>".
818 config DEFAULT_FDT_FILE
819 string "Default fdt file"
821 This option is used to set the default fdt file to boot OS.
824 bool "Execute Misc Init"
825 default y if ARCH_KEYSTONE || ARCH_SUNXI || MPC85xx
826 default y if ARCH_OMAP2PLUS && !AM33XX
828 Enabling this option calls 'misc_init_r' function
830 config VERSION_VARIABLE
831 bool "add U-Boot environment variable vers"
834 If this variable is defined, an environment variable
835 named "ver" is created by U-Boot showing the U-Boot
836 version as printed by the "version" command.
837 Any change to this variable will be reverted at the
840 config BOARD_LATE_INIT
841 bool "Execute Board late init"
843 Sometimes board require some initialization code that might
844 require once the actual init done, example saving board specific env,
845 boot-modes etc. which eventually done at late.
847 So this config enable the late init code with the help of board_late_init
848 function which should defined on respective boards.
850 config DISPLAY_CPUINFO
851 bool "Display information about the CPU during start up"
852 default y if ARC|| ARM || NIOS2 || X86 || XTENSA || M68K
854 Display information about the CPU that U-Boot is running on
855 when U-Boot starts up. The function print_cpuinfo() is called
858 config DISPLAY_BOARDINFO
859 bool "Display information about the board during early start up"
860 default y if ARC || ARM || M68K || MIPS || PPC || SANDBOX || XTENSA
862 Display information about the board that U-Boot is running on
863 when U-Boot starts up. The board function checkboard() is called
866 config DISPLAY_BOARDINFO_LATE
867 bool "Display information about the board during late start up"
869 Display information about the board that U-Boot is running on after
870 the relocation phase. The board function checkboard() is called to do
874 bool "Include bounce buffer API"
876 Some peripherals support DMA from a subset of physically
877 addressable memory only. To support such peripherals, the
878 bounce buffer API uses a temporary buffer: it copies data
879 to/from DMA regions while managing cache operations.
881 A second possible use of bounce buffers is their ability to
882 provide aligned buffers for DMA operations.
885 bool "Call get_board_type() to get and display the board type"
887 If this option is enabled, checkboard() will call get_board_type()
888 to get a string containing the board type and this will be
889 displayed immediately after the model is shown on the console
892 menu "Start-up hooks"
894 config ARCH_EARLY_INIT_R
895 bool "Call arch-specific init soon after relocation"
897 With this option U-Boot will call arch_early_init_r() soon after
898 relocation. Driver model is running by this point, and the cache
899 is on. Note that board_early_init_r() is called first, if
900 enabled. This can be used to set up architecture-specific devices.
902 config ARCH_MISC_INIT
903 bool "Call arch-specific init after relocation, when console is ready"
905 With this option U-Boot will call arch_misc_init() after
906 relocation to allow miscellaneous arch-dependent initialisation
907 to be performed. This function should be defined by the board
908 and will be called after the console is set up, after relocation.
910 config BOARD_EARLY_INIT_F
911 bool "Call board-specific init before relocation"
913 Some boards need to perform initialisation as soon as possible
914 after boot. With this option, U-Boot calls board_early_init_f()
915 after driver model is ready in the pre-relocation init sequence.
916 Note that the normal serial console is not yet set up, but the
917 debug UART will be available if enabled.
919 config BOARD_EARLY_INIT_R
920 bool "Call board-specific init after relocation"
922 Some boards need to perform initialisation as directly after
923 relocation. With this option, U-Boot calls board_early_init_r()
924 in the post-relocation init sequence.
926 config LAST_STAGE_INIT
927 bool "Call board-specific as last setup step"
929 Some boards need to perform initialisation immediately before control
930 is passed to the command-line interpreter (e.g. for initializations
931 that depend on later phases in the init sequence). With this option,
932 U-Boot calls last_stage_init() before the command-line interpreter is
937 menu "Security support"
940 bool # "Support hashing API (SHA1, SHA256, etc.)"
942 This provides a way to hash data in memory using various supported
943 algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
944 and the algorithms it supports are defined in common/hash.c. See
945 also CMD_HASH for command-line access.
948 bool "Build Android Verified Boot operations"
949 depends on LIBAVB && FASTBOOT
950 depends on PARTITION_UUIDS
952 This option enables compilation of bootloader-dependent operations,
953 used by Android Verified Boot 2.0 library (libavb). Includes:
954 * Helpers to process strings in order to build OS bootargs.
955 * Helpers to access MMC, similar to drivers/fastboot/fb_mmc.c.
956 * Helpers to alloc/init/free avb ops.
959 bool # "Support hashing API (SHA1, SHA256, etc.)"
961 This provides a way to hash data in memory using various supported
962 algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
963 and the algorithms it supports are defined in common/hash.c. See
964 also CMD_HASH for command-line access.
967 bool # "Support hashing API (SHA1, SHA256, etc.)"
969 This provides a way to hash data in memory using various supported
970 algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
971 and the algorithms it supports are defined in common/hash.c. See
972 also CMD_HASH for command-line access.
976 menu "Update support"
979 bool "Auto-update using fitImage via TFTP"
982 This option allows performing update of NOR with data in fitImage
985 config UPDATE_TFTP_CNT_MAX
986 int "The number of connection retries during auto-update"
988 depends on UPDATE_TFTP
990 config UPDATE_TFTP_MSEC_MAX
991 int "Delay in mSec to wait for the TFTP server during auto-update"
993 depends on UPDATE_TFTP
996 bool "Android A/B updates"
999 If enabled, adds support for the new Android A/B update model. This
1000 allows the bootloader to select which slot to boot from based on the
1001 information provided by userspace via the Android boot_ctrl HAL. This
1002 allows a bootloader to try a new version of the system but roll back
1003 to previous version if the new one didn't boot all the way.
1010 bool "Support for a bloblist"
1012 This enables support for a bloblist in U-Boot, which can be passed
1013 from TPL to SPL to U-Boot proper (and potentially to Linux). The
1014 blob list supports multiple binary blobs of data, each with a tag,
1015 so that different U-Boot components can store data which can survive
1016 through to the next stage of the boot.
1019 bool "Support for a bloblist in SPL"
1023 This enables a bloblist in SPL. If this is the first part of U-Boot
1024 to run, then the bloblist is set up in SPL and passed to U-Boot
1025 proper. If TPL also has a bloblist, then SPL uses the one from there.
1028 bool "Support for a bloblist in TPL"
1032 This enables a bloblist in TPL. The bloblist is set up in TPL and
1033 passed to SPL and U-Boot proper.
1035 config BLOBLIST_SIZE
1036 hex "Size of bloblist"
1040 Sets the size of the bloblist in bytes. This must include all
1041 overhead (alignment, bloblist header, record header). The bloblist
1042 is set up in the first part of U-Boot to run (TPL, SPL or U-Boot
1043 proper), and this sane bloblist is used for subsequent stages.
1045 config BLOBLIST_ADDR
1046 hex "Address of bloblist"
1048 default 0xe000 if SANDBOX
1050 Sets the address of the bloblist, set up by the first part of U-Boot
1051 which runs. Subsequent U-Boot stages typically use the same address.
1055 source "common/spl/Kconfig"
1057 config IMAGE_SIGN_INFO
1062 Enable image_sign_info helper functions.