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.
73 bool "Store boot timing information in the OS device tree"
76 Stash the bootstage information in the FDT. A root 'bootstage'
77 node is created with each bootstage id as a child. Each child
78 has a 'name' property and either 'mark' containing the
79 mark time in microseconds, or 'accum' containing the
80 accumulated time for that bootstage id in microseconds.
85 name = "board_init_f";
94 Code in the Linux kernel can find this in /proc/devicetree.
96 config BOOTSTAGE_STASH
97 bool "Stash the boot timing information in memory before booting OS"
100 Some OSes do not support device tree. Bootstage can instead write
101 the boot timing information in a binary format at a given address.
102 This happens through a call to bootstage_stash(), typically in
103 the CPU's cleanup_before_linux() function. You can use the
104 'bootstage stash' and 'bootstage unstash' commands to do this on
107 config BOOTSTAGE_STASH_ADDR
108 hex "Address to stash boot timing information"
111 Provide an address which will not be overwritten by the OS when it
112 starts, so that it can read this information when ready.
114 config BOOTSTAGE_STASH_SIZE
115 hex "Size of boot timing stash region"
118 This should be large enough to hold the bootstage stash. A value of
119 4096 (4KiB) is normally plenty.
126 bool "Support for booting from NOR flash"
129 Enabling this will make a U-Boot binary that is capable of being
130 booted via NOR. In this case we will enable certain pinmux early
131 as the ROM only partially sets up pinmux. We also default to using
135 bool "Support for booting from NAND flash"
139 Enabling this will make a U-Boot binary that is capable of being
140 booted via NAND flash. This is not a must, some SoCs need this,
144 bool "Support for booting from ONENAND"
148 Enabling this will make a U-Boot binary that is capable of being
149 booted via ONENAND. This is not a must, some SoCs need this,
153 bool "Support for booting from QSPI flash"
156 Enabling this will make a U-Boot binary that is capable of being
157 booted via QSPI flash. This is not a must, some SoCs need this,
161 bool "Support for booting from SATA"
164 Enabling this will make a U-Boot binary that is capable of being
165 booted via SATA. This is not a must, some SoCs need this,
169 bool "Support for booting from SD/EMMC"
172 Enabling this will make a U-Boot binary that is capable of being
173 booted via SD/EMMC. This is not a must, some SoCs need this,
177 bool "Support for booting from SPI flash"
180 Enabling this will make a U-Boot binary that is capable of being
181 booted via SPI flash. This is not a must, some SoCs need this,
187 int "delay in seconds before automatically booting"
191 Delay before automatically running bootcmd;
192 set to 0 to autoboot with no delay, but you can stop it by key input.
193 set to -1 to disable autoboot.
194 set to -2 to autoboot with no delay and not check for abort
196 If this value is >= 0 then it is also used for the default delay
197 before starting the default entry in bootmenu. If it is < 0 then
198 a default value of 10s is used.
200 See doc/README.autoboot for details.
203 bool "Enable boot arguments"
205 Provide boot arguments to bootm command. Boot arguments are specified
206 in CONFIG_BOOTARGS option. Enable this option to be able to specify
207 CONFIG_BOOTARGS string. If this option is disabled, CONFIG_BOOTARGS
208 will be undefined and won't take any space in U-Boot image.
211 string "Boot arguments"
212 depends on USE_BOOTARGS
214 This can be used to pass arguments to the bootm command. The value of
215 CONFIG_BOOTARGS goes into the environment value "bootargs". Note that
216 this value will also override the "chosen" node in FDT blob.
218 config USE_BOOTCOMMAND
219 bool "Enable a default value for bootcmd"
221 Provide a default value for the bootcmd entry in the environment. If
222 autoboot is enabled this is what will be run automatically. Enable
223 this option to be able to specify CONFIG_BOOTCOMMAND as a string. If
224 this option is disabled, CONFIG_BOOTCOMMAND will be undefined and
225 won't take any space in U-Boot image.
228 string "bootcmd value"
229 depends on USE_BOOTCOMMAND
230 default "run distro_bootcmd" if DISTRO_DEFAULTS
232 This is the string of commands that will be used as bootcmd and if
233 AUTOBOOT is set, automatically run.
240 This is the library functionality to provide a text-based menu of
241 choices for the user to make choices with.
243 config CONSOLE_RECORD
244 bool "Console recording"
246 This provides a way to record console output (and provide console
247 input) through circular buffers. This is mostly useful for testing.
248 Console output is recorded even when the console is silent.
249 To enable console recording, call console_record_reset_enable()
252 config CONSOLE_RECORD_OUT_SIZE
253 hex "Output buffer size"
254 depends on CONSOLE_RECORD
255 default 0x400 if CONSOLE_RECORD
257 Set the size of the console output buffer. When this fills up, no
258 more data will be recorded until some is removed. The buffer is
259 allocated immediately after the malloc() region is ready.
261 config CONSOLE_RECORD_IN_SIZE
262 hex "Input buffer size"
263 depends on CONSOLE_RECORD
264 default 0x100 if CONSOLE_RECORD
266 Set the size of the console input buffer. When this contains data,
267 tstc() and getc() will use this in preference to real device input.
268 The buffer is allocated immediately after the malloc() region is
271 config DISABLE_CONSOLE
272 bool "Add functionality to disable console completely"
274 Disable console (in & out).
277 string "Board specific string to be added to uboot version string"
279 This options adds the board specific name to u-boot version.
286 All Messages with a loglevel smaller than the console loglevel will
287 be compiled in. The loglevels are defined as follows:
289 0 (KERN_EMERG) system is unusable
290 1 (KERN_ALERT) action must be taken immediately
291 2 (KERN_CRIT) critical conditions
292 3 (KERN_ERR) error conditions
293 4 (KERN_WARNING) warning conditions
294 5 (KERN_NOTICE) normal but significant condition
295 6 (KERN_INFO) informational
296 7 (KERN_DEBUG) debug-level messages
306 config SILENT_CONSOLE
307 bool "Support a silent console"
309 This option allows the console to be silenced, meaning that no
310 output will appear on the console devices. This is controlled by
311 setting the environment variable 'silent' to a non-empty value.
312 Note this also silences the console when booting Linux.
314 When the console is set up, the variable is checked, and the
315 GD_FLG_SILENT flag is set. Changing the environment variable later
316 will update the flag.
318 config SILENT_U_BOOT_ONLY
319 bool "Only silence the U-Boot console"
320 depends on SILENT_CONSOLE
322 Normally when the U-Boot console is silenced, Linux's console is
323 also silenced (assuming the board boots into Linux). This option
324 allows the linux console to operate normally, even if U-Boot's
327 config SILENT_CONSOLE_UPDATE_ON_SET
328 bool "Changes to the 'silent' environment variable update immediately"
329 depends on SILENT_CONSOLE
330 default y if SILENT_CONSOLE
332 When the 'silent' environment variable is changed, update the
333 console silence flag immediately. This allows 'setenv' to be used
334 to silence or un-silence the console.
336 The effect is that any change to the variable will affect the
339 config SILENT_CONSOLE_UPDATE_ON_RELOC
340 bool "Allow flags to take effect on relocation"
341 depends on SILENT_CONSOLE
343 In some cases the environment is not available until relocation
344 (e.g. NAND). This option makes the value of the 'silent'
345 environment variable take effect at relocation.
347 config PRE_CONSOLE_BUFFER
348 bool "Buffer characters before the console is available"
350 Prior to the console being initialised (i.e. serial UART
351 initialised etc) all console output is silently discarded.
352 Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to
353 buffer any console messages prior to the console being
354 initialised to a buffer. The buffer is a circular buffer, so
355 if it overflows, earlier output is discarded.
357 Note that this is not currently supported in SPL. It would be
358 useful to be able to share the pre-console buffer with SPL.
360 config PRE_CON_BUF_SZ
361 int "Sets the size of the pre-console buffer"
362 depends on PRE_CONSOLE_BUFFER
365 The size of the pre-console buffer affects how much console output
366 can be held before it overflows and starts discarding earlier
367 output. Normally there is very little output at this early stage,
368 unless debugging is enabled, so allow enough for ~10 lines of
371 This is a useful feature if you are using a video console and
372 want to see the full boot output on the console. Without this
373 option only the post-relocation output will be displayed.
375 config PRE_CON_BUF_ADDR
376 hex "Address of the pre-console buffer"
377 depends on PRE_CONSOLE_BUFFER
378 default 0x2f000000 if ARCH_SUNXI && MACH_SUN9I
379 default 0x4f000000 if ARCH_SUNXI && !MACH_SUN9I
381 This sets the start address of the pre-console buffer. This must
382 be in available memory and is accessed before relocation and
383 possibly before DRAM is set up. Therefore choose an address
386 We should consider removing this option and allocating the memory
387 in board_init_f_init_reserve() instead.
390 bool "Enable console multiplexing"
391 default y if DM_VIDEO || VIDEO || LCD
393 This allows multiple devices to be used for each console 'file'.
394 For example, stdout can be set to go to serial and video.
395 Similarly, stdin can be set to come from serial and keyboard.
396 Input can be provided from either source. Console multiplexing
397 adds a small amount of size to U-Boot. Changes to the environment
398 variables stdout, stdin and stderr will take effect immediately.
400 config SYS_CONSOLE_IS_IN_ENV
401 bool "Select console devices from the environment"
402 default y if CONSOLE_MUX
404 This allows multiple input/output devices to be set at boot time.
405 For example, if stdout is set to "serial,video" then output will
406 be sent to both the serial and video devices on boot. The
407 environment variables can be updated after boot to change the
408 input/output devices.
410 config SYS_CONSOLE_OVERWRITE_ROUTINE
411 bool "Allow board control over console overwriting"
413 If this is enabled, and the board-specific function
414 overwrite_console() returns 1, the stdin, stderr and stdout are
415 switched to the serial port, else the settings in the environment
416 are used. If this is not enabled, the console will not be switched
419 config SYS_CONSOLE_ENV_OVERWRITE
420 bool "Update environment variables during console init"
422 The console environment variables (stdout, stdin, stderr) can be
423 used to determine the correct console devices on start-up. This
424 option writes the console devices to these variables on console
425 start-up (after relocation). This causes the environment to be
426 updated to match the console devices actually chosen.
428 config SYS_CONSOLE_INFO_QUIET
429 bool "Don't display the console devices on boot"
431 Normally U-Boot displays the current settings for stdout, stdin
432 and stderr on boot when the post-relocation console is set up.
433 Enable this option to suppress this output. It can be obtained by
434 calling stdio_print_current_devices() from board code.
436 config SYS_STDIO_DEREGISTER
437 bool "Allow deregistering stdio devices"
438 default y if USB_KEYBOARD
440 Generally there is no need to deregister stdio devices since they
441 are never deactivated. But if a stdio device is used which can be
442 removed (for example a USB keyboard) then this option can be
443 enabled to ensure this is handled correctly.
450 bool "Enable logging support"
453 This enables support for logging of status and debug messages. These
454 can be displayed on the console, recorded in a memory buffer, or
455 discarded if not needed. Logging supports various categories and
459 bool "Enable logging support in SPL"
462 This enables support for logging of status and debug messages. These
463 can be displayed on the console, recorded in a memory buffer, or
464 discarded if not needed. Logging supports various categories and
468 bool "Enable logging support in TPL"
471 This enables support for logging of status and debug messages. These
472 can be displayed on the console, recorded in a memory buffer, or
473 discarded if not needed. Logging supports various categories and
477 int "Maximum log level to record"
481 This selects the maximum log level that will be recorded. Any value
482 higher than this will be ignored. If possible log statements below
483 this level will be discarded at build time. Levels:
494 config SPL_LOG_MAX_LEVEL
495 int "Maximum log level to record in SPL"
499 This selects the maximum log level that will be recorded. Any value
500 higher than this will be ignored. If possible log statements below
501 this level will be discarded at build time. Levels:
512 config TPL_LOG_MAX_LEVEL
513 int "Maximum log level to record in TPL"
517 This selects the maximum log level that will be recorded. Any value
518 higher than this will be ignored. If possible log statements below
519 this level will be discarded at build time. Levels:
531 bool "Allow log output to the console"
535 Enables a log driver which writes log records to the console.
536 Generally the console is the serial port or LCD display. Only the
537 log message is shown - other details like level, category, file and
538 line number are omitted.
540 config SPL_LOG_CONSOLE
541 bool "Allow log output to the console in SPL"
545 Enables a log driver which writes log records to the console.
546 Generally the console is the serial port or LCD display. Only the
547 log message is shown - other details like level, category, file and
548 line number are omitted.
550 config TPL_LOG_CONSOLE
551 bool "Allow log output to the console in SPL"
555 Enables a log driver which writes log records to the console.
556 Generally the console is the serial port or LCD display. Only the
557 log message is shown - other details like level, category, file and
558 line number are omitted.
561 bool "Provide a test for logging"
565 This enables a 'log test' command to test logging. It is normally
566 executed from a pytest and simply outputs logging information
567 in various different ways to test that the logging system works
568 correctly with various settings.
570 config LOG_ERROR_RETURN
571 bool "Log all functions which return an error"
574 When an error is returned in U-Boot it is sometimes difficult to
575 figure out the root cause. For example, reading from SPI flash may
576 fail due to a problem in the SPI controller or due to the flash part
577 not returning the expected information. This option changes
578 log_ret() to log any errors it sees. With this option disabled,
581 You can add log_ret() to all functions which return an error code.
585 config SUPPORT_RAW_INITRD
586 bool "Enable raw initrd images"
588 Note, defining the SUPPORT_RAW_INITRD allows user to supply
589 kernel with raw initrd images. The syntax is slightly different, the
590 address of the initrd must be augmented by it's size, in the following
591 format: "<initrd address>:<initrd size>".
593 config DEFAULT_FDT_FILE
594 string "Default fdt file"
596 This option is used to set the default fdt file to boot OS.
599 bool "Execute Misc Init"
600 default y if ARCH_KEYSTONE || ARCH_SUNXI || MPC85xx
601 default y if ARCH_OMAP2PLUS && !AM33XX
603 Enabling this option calls 'misc_init_r' function
605 config VERSION_VARIABLE
606 bool "add U-Boot environment variable vers"
609 If this variable is defined, an environment variable
610 named "ver" is created by U-Boot showing the U-Boot
611 version as printed by the "version" command.
612 Any change to this variable will be reverted at the
615 config BOARD_LATE_INIT
616 bool "Execute Board late init"
618 Sometimes board require some initialization code that might
619 require once the actual init done, example saving board specific env,
620 boot-modes etc. which eventually done at late.
622 So this config enable the late init code with the help of board_late_init
623 function which should defined on respective boards.
625 config DISPLAY_CPUINFO
626 bool "Display information about the CPU during start up"
627 default y if ARC|| ARM || NIOS2 || X86 || XTENSA || M68K
629 Display information about the CPU that U-Boot is running on
630 when U-Boot starts up. The function print_cpuinfo() is called
633 config DISPLAY_BOARDINFO
634 bool "Display information about the board during early start up"
635 default y if ARC || ARM || M68K || MIPS || PPC || SANDBOX || XTENSA
637 Display information about the board that U-Boot is running on
638 when U-Boot starts up. The board function checkboard() is called
641 config DISPLAY_BOARDINFO_LATE
642 bool "Display information about the board during late start up"
644 Display information about the board that U-Boot is running on after
645 the relocation phase. The board function checkboard() is called to do
649 bool "Include bounce buffer API"
651 Some peripherals support DMA from a subset of physically
652 addressable memory only. To support such peripherals, the
653 bounce buffer API uses a temporary buffer: it copies data
654 to/from DMA regions while managing cache operations.
656 A second possible use of bounce buffers is their ability to
657 provide aligned buffers for DMA operations.
659 menu "Start-up hooks"
661 config ARCH_EARLY_INIT_R
662 bool "Call arch-specific init soon after relocation"
664 With this option U-Boot will call arch_early_init_r() soon after
665 relocation. Driver model is running by this point, and the cache
666 is on. Note that board_early_init_r() is called first, if
667 enabled. This can be used to set up architecture-specific devices.
669 config ARCH_MISC_INIT
670 bool "Call arch-specific init after relocation, when console is ready"
672 With this option U-Boot will call arch_misc_init() after
673 relocation to allow miscellaneous arch-dependent initialisation
674 to be performed. This function should be defined by the board
675 and will be called after the console is set up, after relocation.
677 config BOARD_EARLY_INIT_F
678 bool "Call board-specific init before relocation"
680 Some boards need to perform initialisation as soon as possible
681 after boot. With this option, U-Boot calls board_early_init_f()
682 after driver model is ready in the pre-relocation init sequence.
683 Note that the normal serial console is not yet set up, but the
684 debug UART will be available if enabled.
686 config BOARD_EARLY_INIT_R
687 bool "Call board-specific init after relocation"
689 Some boards need to perform initialisation as directly after
690 relocation. With this option, U-Boot calls board_early_init_r()
691 in the post-relocation init sequence.
693 config LAST_STAGE_INIT
694 bool "Call board-specific as last setup step"
696 Some boards need to perform initialisation immediately before control
697 is passed to the command-line interpreter (e.g. for initializations
698 that depend on later phases in the init sequence). With this option,
699 U-Boot calls last_stage_init() before the command-line interpreter is
704 menu "Security support"
707 bool # "Support hashing API (SHA1, SHA256, etc.)"
709 This provides a way to hash data in memory using various supported
710 algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
711 and the algorithms it supports are defined in common/hash.c. See
712 also CMD_HASH for command-line access.
715 bool "Build Android Verified Boot operations"
716 depends on LIBAVB && FASTBOOT
717 depends on PARTITION_UUIDS
719 This option enables compilation of bootloader-dependent operations,
720 used by Android Verified Boot 2.0 library (libavb). Includes:
721 * Helpers to process strings in order to build OS bootargs.
722 * Helpers to access MMC, similar to drivers/fastboot/fb_mmc.c.
723 * Helpers to alloc/init/free avb ops.
726 bool # "Support hashing API (SHA1, SHA256, etc.)"
728 This provides a way to hash data in memory using various supported
729 algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
730 and the algorithms it supports are defined in common/hash.c. See
731 also CMD_HASH for command-line access.
734 bool # "Support hashing API (SHA1, SHA256, etc.)"
736 This provides a way to hash data in memory using various supported
737 algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
738 and the algorithms it supports are defined in common/hash.c. See
739 also CMD_HASH for command-line access.
743 menu "Update support"
746 bool "Auto-update using fitImage via TFTP"
749 This option allows performing update of NOR with data in fitImage
752 config UPDATE_TFTP_CNT_MAX
753 int "The number of connection retries during auto-update"
755 depends on UPDATE_TFTP
757 config UPDATE_TFTP_MSEC_MAX
758 int "Delay in mSec to wait for the TFTP server during auto-update"
760 depends on UPDATE_TFTP
767 bool "Support for a bloblist"
769 This enables support for a bloblist in U-Boot, which can be passed
770 from TPL to SPL to U-Boot proper (and potentially to Linux). The
771 blob list supports multiple binary blobs of data, each with a tag,
772 so that different U-Boot components can store data which can survive
773 through to the next stage of the boot.
776 bool "Support for a bloblist in SPL"
780 This enables a bloblist in SPL. If this is the first part of U-Boot
781 to run, then the bloblist is set up in SPL and passed to U-Boot
782 proper. If TPL also has a bloblist, then SPL uses the one from there.
785 bool "Support for a bloblist in TPL"
789 This enables a bloblist in TPL. The bloblist is set up in TPL and
790 passed to SPL and U-Boot proper.
793 hex "Size of bloblist"
797 Sets the size of the bloblist in bytes. This must include all
798 overhead (alignment, bloblist header, record header). The bloblist
799 is set up in the first part of U-Boot to run (TPL, SPL or U-Boot
800 proper), and this sane bloblist is used for subsequent stages.
803 hex "Address of bloblist"
805 default 0xe000 if SANDBOX
807 Sets the address of the bloblist, set up by the first part of U-Boot
808 which runs. Subsequent U-Boot stages typically use the same address.
812 source "common/spl/Kconfig"