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_RECORD_COUNT
50 int "Number of boot stage records to store"
53 This is the size of the bootstage record list and is the maximum
54 number of bootstage records that can be recorded.
56 config SPL_BOOTSTAGE_RECORD_COUNT
57 int "Number of boot stage records to store for SPL"
60 This is the size of the bootstage record list and is the maximum
61 number of bootstage records that can be recorded.
64 bool "Store boot timing information in the OS device tree"
67 Stash the bootstage information in the FDT. A root 'bootstage'
68 node is created with each bootstage id as a child. Each child
69 has a 'name' property and either 'mark' containing the
70 mark time in microseconds, or 'accum' containing the
71 accumulated time for that bootstage id in microseconds.
76 name = "board_init_f";
85 Code in the Linux kernel can find this in /proc/devicetree.
87 config BOOTSTAGE_STASH
88 bool "Stash the boot timing information in memory before booting OS"
91 Some OSes do not support device tree. Bootstage can instead write
92 the boot timing information in a binary format at a given address.
93 This happens through a call to bootstage_stash(), typically in
94 the CPU's cleanup_before_linux() function. You can use the
95 'bootstage stash' and 'bootstage unstash' commands to do this on
98 config BOOTSTAGE_STASH_ADDR
99 hex "Address to stash boot timing information"
102 Provide an address which will not be overwritten by the OS when it
103 starts, so that it can read this information when ready.
105 config BOOTSTAGE_STASH_SIZE
106 hex "Size of boot timing stash region"
109 This should be large enough to hold the bootstage stash. A value of
110 4096 (4KiB) is normally plenty.
117 bool "Support for booting from NOR flash"
120 Enabling this will make a U-Boot binary that is capable of being
121 booted via NOR. In this case we will enable certain pinmux early
122 as the ROM only partially sets up pinmux. We also default to using
126 bool "Support for booting from NAND flash"
129 Enabling this will make a U-Boot binary that is capable of being
130 booted via NAND flash. This is not a must, some SoCs need this,
134 bool "Support for booting from ONENAND"
137 Enabling this will make a U-Boot binary that is capable of being
138 booted via ONENAND. This is not a must, some SoCs need this,
142 bool "Support for booting from QSPI flash"
145 Enabling this will make a U-Boot binary that is capable of being
146 booted via QSPI flash. This is not a must, some SoCs need this,
150 bool "Support for booting from SATA"
153 Enabling this will make a U-Boot binary that is capable of being
154 booted via SATA. This is not a must, some SoCs need this,
158 bool "Support for booting from SD/EMMC"
161 Enabling this will make a U-Boot binary that is capable of being
162 booted via SD/EMMC. This is not a must, some SoCs need this,
166 bool "Support for booting from SPI flash"
169 Enabling this will make a U-Boot binary that is capable of being
170 booted via SPI flash. This is not a must, some SoCs need this,
176 int "delay in seconds before automatically booting"
180 Delay before automatically running bootcmd;
181 set to 0 to autoboot with no delay, but you can stop it by key input.
182 set to -1 to disable autoboot.
183 set to -2 to autoboot with no delay and not check for abort
185 See doc/README.autoboot for details.
188 bool "Enable boot arguments"
190 Provide boot arguments to bootm command. Boot arguments are specified
191 in CONFIG_BOOTARGS option. Enable this option to be able to specify
192 CONFIG_BOOTARGS string. If this option is disabled, CONFIG_BOOTARGS
193 will be undefined and won't take any space in U-Boot image.
196 string "Boot arguments"
197 depends on USE_BOOTARGS
199 This can be used to pass arguments to the bootm command. The value of
200 CONFIG_BOOTARGS goes into the environment value "bootargs". Note that
201 this value will also override the "chosen" node in FDT blob.
208 This is the library functionality to provide a text-based menu of
209 choices for the user to make choices with.
211 config CONSOLE_RECORD
212 bool "Console recording"
214 This provides a way to record console output (and provide console
215 input) through circular buffers. This is mostly useful for testing.
216 Console output is recorded even when the console is silent.
217 To enable console recording, call console_record_reset_enable()
220 config CONSOLE_RECORD_OUT_SIZE
221 hex "Output buffer size"
222 depends on CONSOLE_RECORD
223 default 0x400 if CONSOLE_RECORD
225 Set the size of the console output buffer. When this fills up, no
226 more data will be recorded until some is removed. The buffer is
227 allocated immediately after the malloc() region is ready.
229 config CONSOLE_RECORD_IN_SIZE
230 hex "Input buffer size"
231 depends on CONSOLE_RECORD
232 default 0x100 if CONSOLE_RECORD
234 Set the size of the console input buffer. When this contains data,
235 tstc() and getc() will use this in preference to real device input.
236 The buffer is allocated immediately after the malloc() region is
240 string "Board specific string to be added to uboot version string"
242 This options adds the board specific name to u-boot version.
249 All Messages with a loglevel smaller than the console loglevel will
250 be compiled in. The loglevels are defined as follows:
252 0 (KERN_EMERG) system is unusable
253 1 (KERN_ALERT) action must be taken immediately
254 2 (KERN_CRIT) critical conditions
255 3 (KERN_ERR) error conditions
256 4 (KERN_WARNING) warning conditions
257 5 (KERN_NOTICE) normal but significant condition
258 6 (KERN_INFO) informational
259 7 (KERN_DEBUG) debug-level messages
265 config SILENT_CONSOLE
266 bool "Support a silent console"
268 This option allows the console to be silenced, meaning that no
269 output will appear on the console devices. This is controlled by
270 setting the environment vaariable 'silent' to a non-empty value.
271 Note this also silences the console when booting Linux.
273 When the console is set up, the variable is checked, and the
274 GD_FLG_SILENT flag is set. Changing the environment variable later
275 will update the flag.
277 config SILENT_U_BOOT_ONLY
278 bool "Only silence the U-Boot console"
279 depends on SILENT_CONSOLE
281 Normally when the U-Boot console is silenced, Linux's console is
282 also silenced (assuming the board boots into Linux). This option
283 allows the linux console to operate normally, even if U-Boot's
286 config SILENT_CONSOLE_UPDATE_ON_SET
287 bool "Changes to the 'silent' environment variable update immediately"
288 depends on SILENT_CONSOLE
289 default y if SILENT_CONSOLE
291 When the 'silent' environment variable is changed, update the
292 console silence flag immediately. This allows 'setenv' to be used
293 to silence or un-silence the console.
295 The effect is that any change to the variable will affect the
298 config SILENT_CONSOLE_UPDATE_ON_RELOC
299 bool "Allow flags to take effect on relocation"
300 depends on SILENT_CONSOLE
302 In some cases the environment is not available until relocation
303 (e.g. NAND). This option makes the value of the 'silent'
304 environment variable take effect at relocation.
306 config PRE_CONSOLE_BUFFER
307 bool "Buffer characters before the console is available"
309 Prior to the console being initialised (i.e. serial UART
310 initialised etc) all console output is silently discarded.
311 Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to
312 buffer any console messages prior to the console being
313 initialised to a buffer. The buffer is a circular buffer, so
314 if it overflows, earlier output is discarded.
316 Note that this is not currently supported in SPL. It would be
317 useful to be able to share the pre-console buffer with SPL.
319 config PRE_CON_BUF_SZ
320 int "Sets the size of the pre-console buffer"
321 depends on PRE_CONSOLE_BUFFER
324 The size of the pre-console buffer affects how much console output
325 can be held before it overflows and starts discarding earlier
326 output. Normally there is very little output at this early stage,
327 unless debugging is enabled, so allow enough for ~10 lines of
330 This is a useful feature if you are using a video console and
331 want to see the full boot output on the console. Without this
332 option only the post-relocation output will be displayed.
334 config PRE_CON_BUF_ADDR
335 hex "Address of the pre-console buffer"
336 depends on PRE_CONSOLE_BUFFER
337 default 0x2f000000 if ARCH_SUNXI && MACH_SUN9I
338 default 0x4f000000 if ARCH_SUNXI && !MACH_SUN9I
340 This sets the start address of the pre-console buffer. This must
341 be in available memory and is accessed before relocation and
342 possibly before DRAM is set up. Therefore choose an address
345 We should consider removing this option and allocating the memory
346 in board_init_f_init_reserve() instead.
349 bool "Enable console multiplexing"
350 default y if DM_VIDEO || VIDEO || LCD
352 This allows multiple devices to be used for each console 'file'.
353 For example, stdout can be set to go to serial and video.
354 Similarly, stdin can be set to come from serial and keyboard.
355 Input can be provided from either source. Console multiplexing
356 adds a small amount of size to U-Boot. Changes to the environment
357 variables stdout, stdin and stderr will take effect immediately.
359 config SYS_CONSOLE_IS_IN_ENV
360 bool "Select console devices from the environment"
361 default y if CONSOLE_MUX
363 This allows multiple input/output devices to be set at boot time.
364 For example, if stdout is set to "serial,video" then output will
365 be sent to both the serial and video devices on boot. The
366 environment variables can be updated after boot to change the
367 input/output devices.
369 config SYS_CONSOLE_OVERWRITE_ROUTINE
370 bool "Allow board control over console overwriting"
372 If this is enabled, and the board-specific function
373 overwrite_console() returns 1, the stdin, stderr and stdout are
374 switched to the serial port, else the settings in the environment
375 are used. If this is not enabled, the console will not be switched
378 config SYS_CONSOLE_ENV_OVERWRITE
379 bool "Update environment variables during console init"
381 The console environment variables (stdout, stdin, stderr) can be
382 used to determine the correct console devices on start-up. This
383 option writes the console devices to these variables on console
384 start-up (after relocation). This causes the environment to be
385 updated to match the console devices actually chosen.
387 config SYS_CONSOLE_INFO_QUIET
388 bool "Don't display the console devices on boot"
390 Normally U-Boot displays the current settings for stdout, stdin
391 and stderr on boot when the post-relocation console is set up.
392 Enable this option to supress this output. It can be obtained by
393 calling stdio_print_current_devices() from board code.
395 config SYS_STDIO_DEREGISTER
396 bool "Allow deregistering stdio devices"
397 default y if USB_KEYBOARD
399 Generally there is no need to deregister stdio devices since they
400 are never deactivated. But if a stdio device is used which can be
401 removed (for example a USB keyboard) then this option can be
402 enabled to ensure this is handled correctly.
406 config DEFAULT_FDT_FILE
407 string "Default fdt file"
409 This option is used to set the default fdt file to boot OS.
411 config VERSION_VARIABLE
412 bool "add U-Boot environment variable vers"
415 If this variable is defined, an environment variable
416 named "ver" is created by U-Boot showing the U-Boot
417 version as printed by the "version" command.
418 Any change to this variable will be reverted at the
421 config BOARD_LATE_INIT
424 Sometimes board require some initialization code that might
425 require once the actual init done, example saving board specific env,
426 boot-modes etc. which eventually done at late.
428 So this config enable the late init code with the help of board_late_init
429 function which should defined on respective boards.
431 config DISPLAY_CPUINFO
432 bool "Display information about the CPU during start up"
433 default y if ARM || NIOS2 || X86 || XTENSA
435 Display information about the CPU that U-Boot is running on
436 when U-Boot starts up. The function print_cpuinfo() is called
439 config DISPLAY_BOARDINFO
440 bool "Display information about the board during start up"
441 default y if ARM || M68K || MIPS || PPC || SANDBOX || XTENSA
443 Display information about the board that U-Boot is running on
444 when U-Boot starts up. The board function checkboard() is called
447 menu "Start-up hooks"
449 config ARCH_EARLY_INIT_R
450 bool "Call arch-specific init soon after relocation"
452 With this option U-Boot will call arch_early_init_r() soon after
453 relocation. Driver model is running by this point, and the cache
454 is on. Note that board_early_init_r() is called first, if
455 enabled. This can be used to set up architecture-specific devices.
457 config ARCH_MISC_INIT
458 bool "Call arch-specific init after relocation, when console is ready"
460 With this option U-Boot will call arch_misc_init() after
461 relocation to allow miscellaneous arch-dependent initialisation
462 to be performed. This function should be defined by the board
463 and will be called after the console is set up, after relocaiton.
465 config BOARD_EARLY_INIT_F
466 bool "Call board-specific init before relocation"
468 Some boards need to perform initialisation as soon as possible
469 after boot. With this option, U-Boot calls board_early_init_f()
470 after driver model is ready in the pre-relocation init sequence.
471 Note that the normal serial console is not yet set up, but the
472 debug UART will be available if enabled.
476 menu "Security support"
479 bool # "Support hashing API (SHA1, SHA256, etc.)"
481 This provides a way to hash data in memory using various supported
482 algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
483 and the algorithms it supports are defined in common/hash.c. See
484 also CMD_HASH for command-line access.
488 source "common/spl/Kconfig"