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.
21 config BOOTSTAGE_REPORT
22 bool "Display a detailed boot timing report before booting the OS"
25 Enable output of a boot time report just before the OS is booted.
26 This shows how long it took U-Boot to go through each stage of the
27 boot process. The report looks something like this:
29 Timer summary in microseconds:
32 3,575,678 3,575,678 board_init_f start
33 3,575,695 17 arch_cpu_init A9
34 3,575,777 82 arch_cpu_init done
35 3,659,598 83,821 board_init_r start
36 3,910,375 250,777 main_loop
37 29,916,167 26,005,792 bootm_start
38 30,361,327 445,160 start_kernel
40 config BOOTSTAGE_USER_COUNT
41 hex "Number of boot ID numbers available for user use"
44 This is the number of available user bootstage records.
45 Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...)
46 a new ID will be allocated from this stash. If you exceed
47 the limit, recording will stop.
50 bool "Store boot timing information in the OS device tree"
53 Stash the bootstage information in the FDT. A root 'bootstage'
54 node is created with each bootstage id as a child. Each child
55 has a 'name' property and either 'mark' containing the
56 mark time in microseconds, or 'accum' containing the
57 accumulated time for that bootstage id in microseconds.
62 name = "board_init_f";
71 Code in the Linux kernel can find this in /proc/devicetree.
73 config BOOTSTAGE_STASH
74 bool "Stash the boot timing information in memory before booting OS"
77 Some OSes do not support device tree. Bootstage can instead write
78 the boot timing information in a binary format at a given address.
79 This happens through a call to bootstage_stash(), typically in
80 the CPU's cleanup_before_linux() function. You can use the
81 'bootstage stash' and 'bootstage unstash' commands to do this on
84 config BOOTSTAGE_STASH_ADDR
85 hex "Address to stash boot timing information"
88 Provide an address which will not be overwritten by the OS when it
89 starts, so that it can read this information when ready.
91 config BOOTSTAGE_STASH_SIZE
92 hex "Size of boot timing stash region"
95 This should be large enough to hold the bootstage stash. A value of
96 4096 (4KiB) is normally plenty.
103 bool "Support for booting from NOR flash"
106 Enabling this will make a U-Boot binary that is capable of being
107 booted via NOR. In this case we will enable certain pinmux early
108 as the ROM only partially sets up pinmux. We also default to using
112 bool "Support for booting from NAND flash"
115 Enabling this will make a U-Boot binary that is capable of being
116 booted via NAND flash. This is not a must, some SoCs need this,
120 bool "Support for booting from ONENAND"
123 Enabling this will make a U-Boot binary that is capable of being
124 booted via ONENAND. This is not a must, some SoCs need this,
128 bool "Support for booting from QSPI flash"
131 Enabling this will make a U-Boot binary that is capable of being
132 booted via QSPI flash. This is not a must, some SoCs need this,
136 bool "Support for booting from SATA"
139 Enabling this will make a U-Boot binary that is capable of being
140 booted via SATA. This is not a must, some SoCs need this,
144 bool "Support for booting from SD/EMMC"
147 Enabling this will make a U-Boot binary that is capable of being
148 booted via SD/EMMC. This is not a must, some SoCs need this,
152 bool "Support for booting from SPI flash"
155 Enabling this will make a U-Boot binary that is capable of being
156 booted via SPI flash. This is not a must, some SoCs need this,
162 int "delay in seconds before automatically booting"
166 Delay before automatically running bootcmd;
167 set to 0 to autoboot with no delay, but you can stop it by key input.
168 set to -1 to disable autoboot.
169 set to -2 to autoboot with no delay and not check for abort
171 See doc/README.autoboot for details.
178 This is the library functionality to provide a text-based menu of
179 choices for the user to make choices with.
181 config CONSOLE_RECORD
182 bool "Console recording"
184 This provides a way to record console output (and provide console
185 input) through circular buffers. This is mostly useful for testing.
186 Console output is recorded even when the console is silent.
187 To enable console recording, call console_record_reset_enable()
190 config CONSOLE_RECORD_OUT_SIZE
191 hex "Output buffer size"
192 depends on CONSOLE_RECORD
193 default 0x400 if CONSOLE_RECORD
195 Set the size of the console output buffer. When this fills up, no
196 more data will be recorded until some is removed. The buffer is
197 allocated immediately after the malloc() region is ready.
199 config CONSOLE_RECORD_IN_SIZE
200 hex "Input buffer size"
201 depends on CONSOLE_RECORD
202 default 0x100 if CONSOLE_RECORD
204 Set the size of the console input buffer. When this contains data,
205 tstc() and getc() will use this in preference to real device input.
206 The buffer is allocated immediately after the malloc() region is
210 string "Board specific string to be added to uboot version string"
212 This options adds the board specific name to u-boot version.
214 config SILENT_CONSOLE
215 bool "Support a silent console"
217 This option allows the console to be silenced, meaning that no
218 output will appear on the console devices. This is controlled by
219 setting the environment vaariable 'silent' to a non-empty value.
220 Note this also silences the console when booting Linux.
222 When the console is set up, the variable is checked, and the
223 GD_FLG_SILENT flag is set. Changing the environment variable later
224 will update the flag.
226 config SILENT_U_BOOT_ONLY
227 bool "Only silence the U-Boot console"
228 depends on SILENT_CONSOLE
230 Normally when the U-Boot console is silenced, Linux's console is
231 also silenced (assuming the board boots into Linux). This option
232 allows the linux console to operate normally, even if U-Boot's
235 config SILENT_CONSOLE_UPDATE_ON_SET
236 bool "Changes to the 'silent' environment variable update immediately"
237 depends on SILENT_CONSOLE
238 default y if SILENT_CONSOLE
240 When the 'silent' environment variable is changed, update the
241 console silence flag immediately. This allows 'setenv' to be used
242 to silence or un-silence the console.
244 The effect is that any change to the variable will affect the
247 config SILENT_CONSOLE_UPDATE_ON_RELOC
248 bool "Allow flags to take effect on relocation"
249 depends on SILENT_CONSOLE
251 In some cases the environment is not available until relocation
252 (e.g. NAND). This option makes the value of the 'silent'
253 environment variable take effect at relocation.
255 config PRE_CONSOLE_BUFFER
256 bool "Buffer characters before the console is available"
258 Prior to the console being initialised (i.e. serial UART
259 initialised etc) all console output is silently discarded.
260 Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to
261 buffer any console messages prior to the console being
262 initialised to a buffer. The buffer is a circular buffer, so
263 if it overflows, earlier output is discarded.
265 Note that this is not currently supported in SPL. It would be
266 useful to be able to share the pre-console buffer with SPL.
268 config PRE_CON_BUF_SZ
269 int "Sets the size of the pre-console buffer"
270 depends on PRE_CONSOLE_BUFFER
273 The size of the pre-console buffer affects how much console output
274 can be held before it overflows and starts discarding earlier
275 output. Normally there is very little output at this early stage,
276 unless debugging is enabled, so allow enough for ~10 lines of
279 This is a useful feature if you are using a video console and
280 want to see the full boot output on the console. Without this
281 option only the post-relocation output will be displayed.
283 config PRE_CON_BUF_ADDR
284 hex "Address of the pre-console buffer"
285 depends on PRE_CONSOLE_BUFFER
286 default 0x2f000000 if ARCH_SUNXI && MACH_SUN9I
287 default 0x4f000000 if ARCH_SUNXI && !MACH_SUN9I
289 This sets the start address of the pre-console buffer. This must
290 be in available memory and is accessed before relocation and
291 possibly before DRAM is set up. Therefore choose an address
294 We should consider removing this option and allocating the memory
295 in board_init_f_init_reserve() instead.
298 bool "Enable console multiplexing"
299 default y if DM_VIDEO || VIDEO || LCD
301 This allows multiple devices to be used for each console 'file'.
302 For example, stdout can be set to go to serial and video.
303 Similarly, stdin can be set to come from serial and keyboard.
304 Input can be provided from either source. Console multiplexing
305 adds a small amount of size to U-Boot. Changes to the environment
306 variables stdout, stdin and stderr will take effect immediately.
308 config SYS_CONSOLE_IS_IN_ENV
309 bool "Select console devices from the environment"
310 default y if CONSOLE_MUX
312 This allows multiple input/output devices to be set at boot time.
313 For example, if stdout is set to "serial,video" then output will
314 be sent to both the serial and video devices on boot. The
315 environment variables can be updated after boot to change the
316 input/output devices.
318 config SYS_CONSOLE_OVERWRITE_ROUTINE
319 bool "Allow board control over console overwriting"
321 If this is enabled, and the board-specific function
322 overwrite_console() returns 1, the stdin, stderr and stdout are
323 switched to the serial port, else the settings in the environment
324 are used. If this is not enabled, the console will not be switched
327 config SYS_CONSOLE_ENV_OVERWRITE
328 bool "Update environment variables during console init"
330 The console environment variables (stdout, stdin, stderr) can be
331 used to determine the correct console devices on start-up. This
332 option writes the console devices to these variables on console
333 start-up (after relocation). This causes the environment to be
334 updated to match the console devices actually chosen.
336 config SYS_CONSOLE_INFO_QUIET
337 bool "Don't display the console devices on boot"
339 Normally U-Boot displays the current settings for stdout, stdin
340 and stderr on boot when the post-relocation console is set up.
341 Enable this option to supress this output. It can be obtained by
342 calling stdio_print_current_devices() from board code.
344 config SYS_STDIO_DEREGISTER
345 bool "Allow deregistering stdio devices"
346 default y if USB_KEYBOARD
348 Generally there is no need to deregister stdio devices since they
349 are never deactivated. But if a stdio device is used which can be
350 removed (for example a USB keyboard) then this option can be
351 enabled to ensure this is handled correctly.
355 config DEFAULT_FDT_FILE
356 string "Default fdt file"
358 This option is used to set the default fdt file to boot OS.
361 bool "Disable support for parallel NOR flash"
364 This option is used to disable support for parallel NOR flash.
366 config VERSION_VARIABLE
367 bool "add U-Boot environment variable vers"
370 If this variable is defined, an environment variable
371 named "ver" is created by U-Boot showing the U-Boot
372 version as printed by the "version" command.
373 Any change to this variable will be reverted at the
376 config BOARD_LATE_INIT
379 Sometimes board require some initialization code that might
380 require once the actual init done, example saving board specific env,
381 boot-modes etc. which eventually done at late.
383 So this config enable the late init code with the help of board_late_init
384 function which should defined on respective boards.
386 config DISPLAY_CPUINFO
387 bool "Display information about the CPU during start up"
388 default y if ARM || BLACKFIN || NIOS2 || X86 || XTENSA
390 Display information about the CPU that U-Boot is running on
391 when U-Boot starts up. The function print_cpuinfo() is called
394 config DISPLAY_BOARDINFO
395 bool "Display information about the board during start up"
396 default y if ARM || M68K || MIPS || PPC || SPARC || XTENSA
398 Display information about the board that U-Boot is running on
399 when U-Boot starts up. The board function checkboard() is called
402 menu "Start-up hooks"
404 config ARCH_EARLY_INIT_R
405 bool "Call arch-specific init soon after relocation"
408 With this option U-Boot will call arch_early_init_r() soon after
409 relocation. Driver model is running by this point, and the cache
410 is on. Note that board_early_init_r() is called first, if
411 enabled. This can be used to set up architecture-specific devices.
415 source "common/spl/Kconfig"