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
30 config BOOTSTAGE_REPORT
31 bool "Display a detailed boot timing report before booting the OS"
34 Enable output of a boot time report just before the OS is booted.
35 This shows how long it took U-Boot to go through each stage of the
36 boot process. The report looks something like this:
38 Timer summary in microseconds:
41 3,575,678 3,575,678 board_init_f start
42 3,575,695 17 arch_cpu_init A9
43 3,575,777 82 arch_cpu_init done
44 3,659,598 83,821 board_init_r start
45 3,910,375 250,777 main_loop
46 29,916,167 26,005,792 bootm_start
47 30,361,327 445,160 start_kernel
49 config BOOTSTAGE_USER_COUNT
50 int "Number of boot ID numbers available for user use"
53 This is the number of available user bootstage records.
54 Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...)
55 a new ID will be allocated from this stash. If you exceed
56 the limit, recording will stop.
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.
66 bool "Store boot timing information in the OS device tree"
69 Stash the bootstage information in the FDT. A root 'bootstage'
70 node is created with each bootstage id as a child. Each child
71 has a 'name' property and either 'mark' containing the
72 mark time in microseconds, or 'accum' containing the
73 accumulated time for that bootstage id in microseconds.
78 name = "board_init_f";
87 Code in the Linux kernel can find this in /proc/devicetree.
89 config BOOTSTAGE_STASH
90 bool "Stash the boot timing information in memory before booting OS"
93 Some OSes do not support device tree. Bootstage can instead write
94 the boot timing information in a binary format at a given address.
95 This happens through a call to bootstage_stash(), typically in
96 the CPU's cleanup_before_linux() function. You can use the
97 'bootstage stash' and 'bootstage unstash' commands to do this on
100 config BOOTSTAGE_STASH_ADDR
101 hex "Address to stash boot timing information"
104 Provide an address which will not be overwritten by the OS when it
105 starts, so that it can read this information when ready.
107 config BOOTSTAGE_STASH_SIZE
108 hex "Size of boot timing stash region"
111 This should be large enough to hold the bootstage stash. A value of
112 4096 (4KiB) is normally plenty.
119 bool "Support for booting from NOR flash"
122 Enabling this will make a U-Boot binary that is capable of being
123 booted via NOR. In this case we will enable certain pinmux early
124 as the ROM only partially sets up pinmux. We also default to using
128 bool "Support for booting from NAND flash"
131 Enabling this will make a U-Boot binary that is capable of being
132 booted via NAND flash. This is not a must, some SoCs need this,
136 bool "Support for booting from ONENAND"
139 Enabling this will make a U-Boot binary that is capable of being
140 booted via ONENAND. This is not a must, some SoCs need this,
144 bool "Support for booting from QSPI flash"
147 Enabling this will make a U-Boot binary that is capable of being
148 booted via QSPI flash. This is not a must, some SoCs need this,
152 bool "Support for booting from SATA"
155 Enabling this will make a U-Boot binary that is capable of being
156 booted via SATA. This is not a must, some SoCs need this,
160 bool "Support for booting from SD/EMMC"
163 Enabling this will make a U-Boot binary that is capable of being
164 booted via SD/EMMC. This is not a must, some SoCs need this,
168 bool "Support for booting from SPI flash"
171 Enabling this will make a U-Boot binary that is capable of being
172 booted via SPI flash. This is not a must, some SoCs need this,
178 int "delay in seconds before automatically booting"
182 Delay before automatically running bootcmd;
183 set to 0 to autoboot with no delay, but you can stop it by key input.
184 set to -1 to disable autoboot.
185 set to -2 to autoboot with no delay and not check for abort
187 See doc/README.autoboot for details.
190 bool "Enable boot arguments"
192 Provide boot arguments to bootm command. Boot arguments are specified
193 in CONFIG_BOOTARGS option. Enable this option to be able to specify
194 CONFIG_BOOTARGS string. If this option is disabled, CONFIG_BOOTARGS
195 will be undefined and won't take any space in U-Boot image.
198 string "Boot arguments"
199 depends on USE_BOOTARGS
201 This can be used to pass arguments to the bootm command. The value of
202 CONFIG_BOOTARGS goes into the environment value "bootargs". Note that
203 this value will also override the "chosen" node in FDT blob.
210 This is the library functionality to provide a text-based menu of
211 choices for the user to make choices with.
213 config CONSOLE_RECORD
214 bool "Console recording"
216 This provides a way to record console output (and provide console
217 input) through circular buffers. This is mostly useful for testing.
218 Console output is recorded even when the console is silent.
219 To enable console recording, call console_record_reset_enable()
222 config CONSOLE_RECORD_OUT_SIZE
223 hex "Output buffer size"
224 depends on CONSOLE_RECORD
225 default 0x400 if CONSOLE_RECORD
227 Set the size of the console output buffer. When this fills up, no
228 more data will be recorded until some is removed. The buffer is
229 allocated immediately after the malloc() region is ready.
231 config CONSOLE_RECORD_IN_SIZE
232 hex "Input buffer size"
233 depends on CONSOLE_RECORD
234 default 0x100 if CONSOLE_RECORD
236 Set the size of the console input buffer. When this contains data,
237 tstc() and getc() will use this in preference to real device input.
238 The buffer is allocated immediately after the malloc() region is
242 string "Board specific string to be added to uboot version string"
244 This options adds the board specific name to u-boot version.
246 config SILENT_CONSOLE
247 bool "Support a silent console"
249 This option allows the console to be silenced, meaning that no
250 output will appear on the console devices. This is controlled by
251 setting the environment vaariable 'silent' to a non-empty value.
252 Note this also silences the console when booting Linux.
254 When the console is set up, the variable is checked, and the
255 GD_FLG_SILENT flag is set. Changing the environment variable later
256 will update the flag.
258 config SILENT_U_BOOT_ONLY
259 bool "Only silence the U-Boot console"
260 depends on SILENT_CONSOLE
262 Normally when the U-Boot console is silenced, Linux's console is
263 also silenced (assuming the board boots into Linux). This option
264 allows the linux console to operate normally, even if U-Boot's
267 config SILENT_CONSOLE_UPDATE_ON_SET
268 bool "Changes to the 'silent' environment variable update immediately"
269 depends on SILENT_CONSOLE
270 default y if SILENT_CONSOLE
272 When the 'silent' environment variable is changed, update the
273 console silence flag immediately. This allows 'setenv' to be used
274 to silence or un-silence the console.
276 The effect is that any change to the variable will affect the
279 config SILENT_CONSOLE_UPDATE_ON_RELOC
280 bool "Allow flags to take effect on relocation"
281 depends on SILENT_CONSOLE
283 In some cases the environment is not available until relocation
284 (e.g. NAND). This option makes the value of the 'silent'
285 environment variable take effect at relocation.
287 config PRE_CONSOLE_BUFFER
288 bool "Buffer characters before the console is available"
290 Prior to the console being initialised (i.e. serial UART
291 initialised etc) all console output is silently discarded.
292 Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to
293 buffer any console messages prior to the console being
294 initialised to a buffer. The buffer is a circular buffer, so
295 if it overflows, earlier output is discarded.
297 Note that this is not currently supported in SPL. It would be
298 useful to be able to share the pre-console buffer with SPL.
300 config PRE_CON_BUF_SZ
301 int "Sets the size of the pre-console buffer"
302 depends on PRE_CONSOLE_BUFFER
305 The size of the pre-console buffer affects how much console output
306 can be held before it overflows and starts discarding earlier
307 output. Normally there is very little output at this early stage,
308 unless debugging is enabled, so allow enough for ~10 lines of
311 This is a useful feature if you are using a video console and
312 want to see the full boot output on the console. Without this
313 option only the post-relocation output will be displayed.
315 config PRE_CON_BUF_ADDR
316 hex "Address of the pre-console buffer"
317 depends on PRE_CONSOLE_BUFFER
318 default 0x2f000000 if ARCH_SUNXI && MACH_SUN9I
319 default 0x4f000000 if ARCH_SUNXI && !MACH_SUN9I
321 This sets the start address of the pre-console buffer. This must
322 be in available memory and is accessed before relocation and
323 possibly before DRAM is set up. Therefore choose an address
326 We should consider removing this option and allocating the memory
327 in board_init_f_init_reserve() instead.
330 bool "Enable console multiplexing"
331 default y if DM_VIDEO || VIDEO || LCD
333 This allows multiple devices to be used for each console 'file'.
334 For example, stdout can be set to go to serial and video.
335 Similarly, stdin can be set to come from serial and keyboard.
336 Input can be provided from either source. Console multiplexing
337 adds a small amount of size to U-Boot. Changes to the environment
338 variables stdout, stdin and stderr will take effect immediately.
340 config SYS_CONSOLE_IS_IN_ENV
341 bool "Select console devices from the environment"
342 default y if CONSOLE_MUX
344 This allows multiple input/output devices to be set at boot time.
345 For example, if stdout is set to "serial,video" then output will
346 be sent to both the serial and video devices on boot. The
347 environment variables can be updated after boot to change the
348 input/output devices.
350 config SYS_CONSOLE_OVERWRITE_ROUTINE
351 bool "Allow board control over console overwriting"
353 If this is enabled, and the board-specific function
354 overwrite_console() returns 1, the stdin, stderr and stdout are
355 switched to the serial port, else the settings in the environment
356 are used. If this is not enabled, the console will not be switched
359 config SYS_CONSOLE_ENV_OVERWRITE
360 bool "Update environment variables during console init"
362 The console environment variables (stdout, stdin, stderr) can be
363 used to determine the correct console devices on start-up. This
364 option writes the console devices to these variables on console
365 start-up (after relocation). This causes the environment to be
366 updated to match the console devices actually chosen.
368 config SYS_CONSOLE_INFO_QUIET
369 bool "Don't display the console devices on boot"
371 Normally U-Boot displays the current settings for stdout, stdin
372 and stderr on boot when the post-relocation console is set up.
373 Enable this option to supress this output. It can be obtained by
374 calling stdio_print_current_devices() from board code.
376 config SYS_STDIO_DEREGISTER
377 bool "Allow deregistering stdio devices"
378 default y if USB_KEYBOARD
380 Generally there is no need to deregister stdio devices since they
381 are never deactivated. But if a stdio device is used which can be
382 removed (for example a USB keyboard) then this option can be
383 enabled to ensure this is handled correctly.
388 bool "Support swapping dtbs at a later point in boot"
391 It is possible during initial boot you may need to use a generic
392 dtb until you can fully determine the board your running on. This
393 config allows boards to implement a function at a later point
394 during boot to switch to the "correct" dtb.
397 bool "Support a FIT image embedded in the U-boot image"
399 This option provides hooks to allow U-boot to parse an
400 appended FIT image and enable board specific code to then select
401 the correct DTB to be used.
403 config DEFAULT_FDT_FILE
404 string "Default fdt file"
406 This option is used to set the default fdt file to boot OS.
408 config VERSION_VARIABLE
409 bool "add U-Boot environment variable vers"
412 If this variable is defined, an environment variable
413 named "ver" is created by U-Boot showing the U-Boot
414 version as printed by the "version" command.
415 Any change to this variable will be reverted at the
418 config BOARD_LATE_INIT
421 Sometimes board require some initialization code that might
422 require once the actual init done, example saving board specific env,
423 boot-modes etc. which eventually done at late.
425 So this config enable the late init code with the help of board_late_init
426 function which should defined on respective boards.
428 config DISPLAY_CPUINFO
429 bool "Display information about the CPU during start up"
430 default y if ARM || NIOS2 || X86 || XTENSA
432 Display information about the CPU that U-Boot is running on
433 when U-Boot starts up. The function print_cpuinfo() is called
436 config DISPLAY_BOARDINFO
437 bool "Display information about the board during start up"
438 default y if ARM || M68K || MIPS || PPC || SANDBOX || XTENSA
440 Display information about the board that U-Boot is running on
441 when U-Boot starts up. The board function checkboard() is called
444 menu "Start-up hooks"
446 config ARCH_EARLY_INIT_R
447 bool "Call arch-specific init soon after relocation"
449 With this option U-Boot will call arch_early_init_r() soon after
450 relocation. Driver model is running by this point, and the cache
451 is on. Note that board_early_init_r() is called first, if
452 enabled. This can be used to set up architecture-specific devices.
454 config ARCH_MISC_INIT
455 bool "Call arch-specific init after relocation, when console is ready"
457 With this option U-Boot will call arch_misc_init() after
458 relocation to allow miscellaneous arch-dependent initialisation
459 to be performed. This function should be defined by the board
460 and will be called after the console is set up, after relocaiton.
462 config BOARD_EARLY_INIT_F
463 bool "Call board-specific init before relocation"
465 Some boards need to perform initialisation as soon as possible
466 after boot. With this option, U-Boot calls board_early_init_f()
467 after driver model is ready in the pre-relocation init sequence.
468 Note that the normal serial console is not yet set up, but the
469 debug UART will be available if enabled.
473 menu "Security support"
476 bool # "Support hashing API (SHA1, SHA256, etc.)"
478 This provides a way to hash data in memory using various supported
479 algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
480 and the algorithms it supports are defined in common/hash.c. See
481 also CMD_HASH for command-line access.
485 source "common/spl/Kconfig"