xref: /openbmc/u-boot/common/Kconfig (revision c0823a76)
1menu "Boot timing"
2
3config BOOTSTAGE
4	bool "Boot timing and reporting"
5	help
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.
13
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
16	  as the ID.
17
18	  Calls to show_boot_progress() will also result in log entries but
19	  these will not have names.
20
21config SPL_BOOTSTAGE
22	bool "Boot timing and reported in SPL"
23	depends on BOOTSTAGE
24	help
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
28	  up.
29
30config BOOTSTAGE_REPORT
31	bool "Display a detailed boot timing report before booting the OS"
32	depends on BOOTSTAGE
33	help
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:
37
38		Timer summary in microseconds:
39		       Mark    Elapsed  Stage
40			  0          0  reset
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
48
49config BOOTSTAGE_RECORD_COUNT
50	int "Number of boot stage records to store"
51	default 30
52	help
53	  This is the size of the bootstage record list and is the maximum
54	  number of bootstage records that can be recorded.
55
56config SPL_BOOTSTAGE_RECORD_COUNT
57	int "Number of boot stage records to store for SPL"
58	default 5
59	help
60	  This is the size of the bootstage record list and is the maximum
61	  number of bootstage records that can be recorded.
62
63config BOOTSTAGE_FDT
64	bool "Store boot timing information in the OS device tree"
65	depends on BOOTSTAGE
66	help
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.
72	  For example:
73
74		bootstage {
75			154 {
76				name = "board_init_f";
77				mark = <3575678>;
78			};
79			170 {
80				name = "lcd";
81				accum = <33482>;
82			};
83		};
84
85	  Code in the Linux kernel can find this in /proc/devicetree.
86
87config BOOTSTAGE_STASH
88	bool "Stash the boot timing information in memory before booting OS"
89	depends on BOOTSTAGE
90	help
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
96	  the command line.
97
98config BOOTSTAGE_STASH_ADDR
99	hex "Address to stash boot timing information"
100	default 0
101	help
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.
104
105config BOOTSTAGE_STASH_SIZE
106	hex "Size of boot timing stash region"
107	default 0x1000
108	help
109	  This should be large enough to hold the bootstage stash. A value of
110	  4096 (4KiB) is normally plenty.
111
112endmenu
113
114menu "Boot media"
115
116config NOR_BOOT
117	bool "Support for booting from NOR flash"
118	depends on NOR
119	help
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
123	  NOR for environment.
124
125config NAND_BOOT
126	bool "Support for booting from NAND flash"
127	default n
128	help
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,
131	  some not.
132
133config ONENAND_BOOT
134	bool "Support for booting from ONENAND"
135	default n
136	help
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,
139	  some not.
140
141config QSPI_BOOT
142	bool "Support for booting from QSPI flash"
143	default n
144	help
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,
147	  some not.
148
149config SATA_BOOT
150	bool "Support for booting from SATA"
151	default n
152	help
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,
155	  some not.
156
157config SD_BOOT
158	bool "Support for booting from SD/EMMC"
159	default n
160	help
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,
163	  some not.
164
165config SPI_BOOT
166	bool "Support for booting from SPI flash"
167	default n
168	help
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,
171	  some not.
172
173endmenu
174
175config BOOTDELAY
176	int "delay in seconds before automatically booting"
177	default 2
178	depends on AUTOBOOT
179	help
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
184
185	  See doc/README.autoboot for details.
186
187config USE_BOOTARGS
188	bool "Enable boot arguments"
189	help
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.
194
195config BOOTARGS
196	string "Boot arguments"
197	depends on USE_BOOTARGS
198	help
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.
202
203config USE_BOOTCOMMAND
204	bool "Enable a default value for bootcmd"
205	help
206	  Provide a default value for the bootcmd entry in the environment.  If
207	  autoboot is enabled this is what will be run automatically.  Enable
208	  this option to be able to specify CONFIG_BOOTCOMMAND as a string.  If
209	  this option is disabled, CONFIG_BOOTCOMMAND will be undefined and
210	  won't take any space in U-Boot image.
211
212config BOOTCOMMAND
213	string "bootcmd value"
214	depends on USE_BOOTCOMMAND
215	default "run distro_bootcmd" if DISTRO_DEFAULTS
216	help
217	  This is the string of commands that will be used as bootcmd and if
218	  AUTOBOOT is set, automatically run.
219
220menu "Console"
221
222config MENU
223	bool
224	help
225	  This is the library functionality to provide a text-based menu of
226	  choices for the user to make choices with.
227
228config CONSOLE_RECORD
229	bool "Console recording"
230	help
231	  This provides a way to record console output (and provide console
232	  input) through circular buffers. This is mostly useful for testing.
233	  Console output is recorded even when the console is silent.
234	  To enable console recording, call console_record_reset_enable()
235	  from your code.
236
237config CONSOLE_RECORD_OUT_SIZE
238	hex "Output buffer size"
239	depends on CONSOLE_RECORD
240	default 0x400 if CONSOLE_RECORD
241	help
242	  Set the size of the console output buffer. When this fills up, no
243	  more data will be recorded until some is removed. The buffer is
244	  allocated immediately after the malloc() region is ready.
245
246config CONSOLE_RECORD_IN_SIZE
247	hex "Input buffer size"
248	depends on CONSOLE_RECORD
249	default 0x100 if CONSOLE_RECORD
250	help
251	  Set the size of the console input buffer. When this contains data,
252	  tstc() and getc() will use this in preference to real device input.
253	  The buffer is allocated immediately after the malloc() region is
254	  ready.
255
256config IDENT_STRING
257	string "Board specific string to be added to uboot version string"
258	help
259	  This options adds the board specific name to u-boot version.
260
261config LOGLEVEL
262	int "loglevel"
263	default 4
264	range 0 8
265	help
266	  All Messages with a loglevel smaller than the console loglevel will
267	  be compiled in. The loglevels are defined as follows:
268
269	  0 (KERN_EMERG)          system is unusable
270	  1 (KERN_ALERT)          action must be taken immediately
271	  2 (KERN_CRIT)           critical conditions
272	  3 (KERN_ERR)            error conditions
273	  4 (KERN_WARNING)        warning conditions
274	  5 (KERN_NOTICE)         normal but significant condition
275	  6 (KERN_INFO)           informational
276	  7 (KERN_DEBUG)          debug-level messages
277
278config SPL_LOGLEVEL
279	int
280	default LOGLEVEL
281
282config SILENT_CONSOLE
283	bool "Support a silent console"
284	help
285	  This option allows the console to be silenced, meaning that no
286	  output will appear on the console devices. This is controlled by
287	  setting the environment vaariable 'silent' to a non-empty value.
288	  Note this also silences the console when booting Linux.
289
290	  When the console is set up, the variable is checked, and the
291	  GD_FLG_SILENT flag is set. Changing the environment variable later
292	  will update the flag.
293
294config SILENT_U_BOOT_ONLY
295	bool "Only silence the U-Boot console"
296	depends on SILENT_CONSOLE
297	help
298	  Normally when the U-Boot console is silenced, Linux's console is
299	  also silenced (assuming the board boots into Linux). This option
300	  allows the linux console to operate normally, even if U-Boot's
301	  is silenced.
302
303config SILENT_CONSOLE_UPDATE_ON_SET
304	bool "Changes to the 'silent' environment variable update immediately"
305	depends on SILENT_CONSOLE
306	default y if SILENT_CONSOLE
307	help
308	  When the 'silent' environment variable is changed, update the
309	  console silence flag immediately. This allows 'setenv' to be used
310	  to silence or un-silence the console.
311
312	  The effect is that any change to the variable will affect the
313	  GD_FLG_SILENT flag.
314
315config SILENT_CONSOLE_UPDATE_ON_RELOC
316	bool "Allow flags to take effect on relocation"
317	depends on SILENT_CONSOLE
318	help
319	  In some cases the environment is not available until relocation
320	  (e.g. NAND). This option makes the value of the 'silent'
321	  environment variable take effect at relocation.
322
323config PRE_CONSOLE_BUFFER
324	bool "Buffer characters before the console is available"
325	help
326	  Prior to the console being initialised (i.e. serial UART
327	  initialised etc) all console output is silently discarded.
328	  Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to
329	  buffer any console messages prior to the console being
330	  initialised to a buffer. The buffer is a circular buffer, so
331	  if it overflows, earlier output is discarded.
332
333	  Note that this is not currently supported in SPL. It would be
334	  useful to be able to share the pre-console buffer with SPL.
335
336config PRE_CON_BUF_SZ
337	int "Sets the size of the pre-console buffer"
338	depends on PRE_CONSOLE_BUFFER
339	default 4096
340	help
341	  The size of the pre-console buffer affects how much console output
342	  can be held before it overflows and starts discarding earlier
343	  output. Normally there is very little output at this early stage,
344	  unless debugging is enabled, so allow enough for ~10 lines of
345	  text.
346
347	  This is a useful feature if you are using a video console and
348	  want to see the full boot output on the console. Without this
349	  option only the post-relocation output will be displayed.
350
351config PRE_CON_BUF_ADDR
352	hex "Address of the pre-console buffer"
353	depends on PRE_CONSOLE_BUFFER
354	default 0x2f000000 if ARCH_SUNXI && MACH_SUN9I
355	default 0x4f000000 if ARCH_SUNXI && !MACH_SUN9I
356	help
357	  This sets the start address of the pre-console buffer. This must
358	  be in available memory and is accessed before relocation and
359	  possibly before DRAM is set up. Therefore choose an address
360	  carefully.
361
362	  We should consider removing this option and allocating the memory
363	  in board_init_f_init_reserve() instead.
364
365config CONSOLE_MUX
366	bool "Enable console multiplexing"
367	default y if DM_VIDEO || VIDEO || LCD
368	help
369	  This allows multiple devices to be used for each console 'file'.
370	  For example, stdout can be set to go to serial and video.
371	  Similarly, stdin can be set to come from serial and keyboard.
372	  Input can be provided from either source. Console multiplexing
373	  adds a small amount of size to U-Boot.  Changes to the environment
374	  variables stdout, stdin and stderr will take effect immediately.
375
376config SYS_CONSOLE_IS_IN_ENV
377	bool "Select console devices from the environment"
378	default y if CONSOLE_MUX
379	help
380	  This allows multiple input/output devices to be set at boot time.
381	  For example, if stdout is set to "serial,video" then output will
382	  be sent to both the serial and video devices on boot. The
383	  environment variables can be updated after boot to change the
384	  input/output devices.
385
386config SYS_CONSOLE_OVERWRITE_ROUTINE
387	bool "Allow board control over console overwriting"
388	help
389	  If this is enabled, and the board-specific function
390	  overwrite_console() returns 1, the stdin, stderr and stdout are
391	  switched to the serial port, else the settings in the environment
392	  are used. If this is not enabled, the console will not be switched
393	  to serial.
394
395config SYS_CONSOLE_ENV_OVERWRITE
396	bool "Update environment variables during console init"
397	help
398	  The console environment variables (stdout, stdin, stderr) can be
399	  used to determine the correct console devices on start-up. This
400	  option writes the console devices to these variables on console
401	  start-up (after relocation). This causes the environment to be
402	  updated to match the console devices actually chosen.
403
404config SYS_CONSOLE_INFO_QUIET
405	bool "Don't display the console devices on boot"
406	help
407	  Normally U-Boot displays the current settings for stdout, stdin
408	  and stderr on boot when the post-relocation console is set up.
409	  Enable this option to supress this output. It can be obtained by
410	  calling stdio_print_current_devices() from board code.
411
412config SYS_STDIO_DEREGISTER
413	bool "Allow deregistering stdio devices"
414	default y if USB_KEYBOARD
415	help
416	  Generally there is no need to deregister stdio devices since they
417	  are never deactivated. But if a stdio device is used which can be
418	  removed (for example a USB keyboard) then this option can be
419	  enabled to ensure this is handled correctly.
420
421endmenu
422
423config DEFAULT_FDT_FILE
424	string "Default fdt file"
425	help
426	  This option is used to set the default fdt file to boot OS.
427
428config VERSION_VARIABLE
429	bool "add U-Boot environment variable vers"
430	default n
431	help
432	  If this variable is defined, an environment variable
433	  named "ver" is created by U-Boot showing the U-Boot
434	  version as printed by the "version" command.
435	  Any change to this variable will be reverted at the
436	  next reset.
437
438config BOARD_LATE_INIT
439	bool
440	help
441	  Sometimes board require some initialization code that might
442	  require once the actual init done, example saving board specific env,
443	  boot-modes etc. which eventually done at late.
444
445	  So this config enable the late init code with the help of board_late_init
446	  function which should defined on respective boards.
447
448config DISPLAY_CPUINFO
449	bool "Display information about the CPU during start up"
450	default y if ARM || NIOS2 || X86 || XTENSA
451	help
452	  Display information about the CPU that U-Boot is running on
453	  when U-Boot starts up. The function print_cpuinfo() is called
454	  to do this.
455
456config DISPLAY_BOARDINFO
457	bool "Display information about the board during start up"
458	default y if ARM || M68K || MIPS || PPC || SANDBOX || XTENSA
459	help
460	  Display information about the board that U-Boot is running on
461	  when U-Boot starts up. The board function checkboard() is called
462	  to do this.
463
464menu "Start-up hooks"
465
466config ARCH_EARLY_INIT_R
467	bool "Call arch-specific init soon after relocation"
468	help
469	  With this option U-Boot will call arch_early_init_r() soon after
470	  relocation. Driver model is running by this point, and the cache
471	  is on. Note that board_early_init_r() is called first, if
472	  enabled. This can be used to set up architecture-specific devices.
473
474config ARCH_MISC_INIT
475	bool "Call arch-specific init after relocation, when console is ready"
476	help
477	  With this option U-Boot will call arch_misc_init() after
478	  relocation to allow miscellaneous arch-dependent initialisation
479	  to be performed. This function should be defined by the board
480	  and will be called after the console is set up, after relocaiton.
481
482config BOARD_EARLY_INIT_F
483	bool "Call board-specific init before relocation"
484	help
485	  Some boards need to perform initialisation as soon as possible
486	  after boot. With this option, U-Boot calls board_early_init_f()
487	  after driver model is ready in the pre-relocation init sequence.
488	  Note that the normal serial console is not yet set up, but the
489	  debug UART will be available if enabled.
490
491endmenu
492
493menu "Security support"
494
495config HASH
496	bool # "Support hashing API (SHA1, SHA256, etc.)"
497	help
498	  This provides a way to hash data in memory using various supported
499	  algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
500	  and the algorithms it supports are defined in common/hash.c. See
501	  also CMD_HASH for command-line access.
502
503endmenu
504
505source "common/spl/Kconfig"
506