xref: /openbmc/u-boot/common/Kconfig (revision 9ec4a67e)
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 BOOTSTAGE_REPORT
22	bool "Display a detailed boot timing report before booting the OS"
23	depends on BOOTSTAGE
24	help
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:
28
29		Timer summary in microseconds:
30		       Mark    Elapsed  Stage
31			  0          0  reset
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
39
40config BOOTSTAGE_USER_COUNT
41	hex "Number of boot ID numbers available for user use"
42	default 20
43	help
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.
48
49config BOOTSTAGE_FDT
50	bool "Store boot timing information in the OS device tree"
51	depends on BOOTSTAGE
52	help
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.
58	  For example:
59
60		bootstage {
61			154 {
62				name = "board_init_f";
63				mark = <3575678>;
64			};
65			170 {
66				name = "lcd";
67				accum = <33482>;
68			};
69		};
70
71	  Code in the Linux kernel can find this in /proc/devicetree.
72
73config BOOTSTAGE_STASH
74	bool "Stash the boot timing information in memory before booting OS"
75	depends on BOOTSTAGE
76	help
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
82	  the command line.
83
84config BOOTSTAGE_STASH_ADDR
85	hex "Address to stash boot timing information"
86	default 0
87	help
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.
90
91config BOOTSTAGE_STASH_SIZE
92	hex "Size of boot timing stash region"
93	default 4096
94	help
95	  This should be large enough to hold the bootstage stash. A value of
96	  4096 (4KiB) is normally plenty.
97
98endmenu
99
100menu "Boot media"
101
102config NOR_BOOT
103	bool "Support for booting from NOR flash"
104	depends on NOR
105	help
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
109	  NOR for environment.
110
111config NAND_BOOT
112	bool "Support for booting from NAND flash"
113	default n
114	help
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,
117	  some not.
118
119config ONENAND_BOOT
120	bool "Support for booting from ONENAND"
121	default n
122	help
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,
125	  some not.
126
127config QSPI_BOOT
128	bool "Support for booting from QSPI flash"
129	default n
130	help
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,
133	  some not.
134
135config SATA_BOOT
136	bool "Support for booting from SATA"
137	default n
138	help
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,
141	  some not.
142
143config SD_BOOT
144	bool "Support for booting from SD/EMMC"
145	default n
146	help
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,
149	  some not.
150
151config SPI_BOOT
152	bool "Support for booting from SPI flash"
153	default n
154	help
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,
157	  some not.
158
159endmenu
160
161config BOOTDELAY
162	int "delay in seconds before automatically booting"
163	default 2
164	depends on AUTOBOOT
165	help
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
170
171	  See doc/README.autoboot for details.
172
173menu "Console"
174
175config CONSOLE_RECORD
176	bool "Console recording"
177	help
178	  This provides a way to record console output (and provide console
179	  input) through circular buffers. This is mostly useful for testing.
180	  Console output is recorded even when the console is silent.
181	  To enable console recording, call console_record_reset_enable()
182	  from your code.
183
184config CONSOLE_RECORD_OUT_SIZE
185	hex "Output buffer size"
186	depends on CONSOLE_RECORD
187	default 0x400 if CONSOLE_RECORD
188	help
189	  Set the size of the console output buffer. When this fills up, no
190	  more data will be recorded until some is removed. The buffer is
191	  allocated immediately after the malloc() region is ready.
192
193config CONSOLE_RECORD_IN_SIZE
194	hex "Input buffer size"
195	depends on CONSOLE_RECORD
196	default 0x100 if CONSOLE_RECORD
197	help
198	  Set the size of the console input buffer. When this contains data,
199	  tstc() and getc() will use this in preference to real device input.
200	  The buffer is allocated immediately after the malloc() region is
201	  ready.
202
203config IDENT_STRING
204	string "Board specific string to be added to uboot version string"
205	help
206	  This options adds the board specific name to u-boot version.
207
208config SILENT_CONSOLE
209	bool "Support a silent console"
210	help
211	  This option allows the console to be silenced, meaning that no
212	  output will appear on the console devices. This is controlled by
213	  setting the environment vaariable 'silent' to a non-empty value.
214	  Note this also silences the console when booting Linux.
215
216	  When the console is set up, the variable is checked, and the
217	  GD_FLG_SILENT flag is set. Changing the environment variable later
218	  will update the flag.
219
220config SILENT_U_BOOT_ONLY
221	bool "Only silence the U-Boot console"
222	depends on SILENT_CONSOLE
223	help
224	  Normally when the U-Boot console is silenced, Linux's console is
225	  also silenced (assuming the board boots into Linux). This option
226	  allows the linux console to operate normally, even if U-Boot's
227	  is silenced.
228
229config SILENT_CONSOLE_UPDATE_ON_SET
230	bool "Changes to the 'silent' environment variable update immediately"
231	depends on SILENT_CONSOLE
232	default y if SILENT_CONSOLE
233	help
234	  When the 'silent' environment variable is changed, update the
235	  console silence flag immediately. This allows 'setenv' to be used
236	  to silence or un-silence the console.
237
238	  The effect is that any change to the variable will affect the
239	  GD_FLG_SILENT flag.
240
241config SILENT_CONSOLE_UPDATE_ON_RELOC
242	bool "Allow flags to take effect on relocation"
243	depends on SILENT_CONSOLE
244	help
245	  In some cases the environment is not available until relocation
246	  (e.g. NAND). This option makes the value of the 'silent'
247	  environment variable take effect at relocation.
248
249config PRE_CONSOLE_BUFFER
250	bool "Buffer characters before the console is available"
251	help
252	  Prior to the console being initialised (i.e. serial UART
253	  initialised etc) all console output is silently discarded.
254	  Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to
255	  buffer any console messages prior to the console being
256	  initialised to a buffer. The buffer is a circular buffer, so
257	  if it overflows, earlier output is discarded.
258
259	  Note that this is not currently supported in SPL. It would be
260	  useful to be able to share the pre-console buffer with SPL.
261
262config PRE_CON_BUF_SZ
263	int "Sets the size of the pre-console buffer"
264	depends on PRE_CONSOLE_BUFFER
265	default 4096
266	help
267	  The size of the pre-console buffer affects how much console output
268	  can be held before it overflows and starts discarding earlier
269	  output. Normally there is very little output at this early stage,
270	  unless debugging is enabled, so allow enough for ~10 lines of
271	  text.
272
273	  This is a useful feature if you are using a video console and
274	  want to see the full boot output on the console. Without this
275	  option only the post-relocation output will be displayed.
276
277config PRE_CON_BUF_ADDR
278	hex "Address of the pre-console buffer"
279	depends on PRE_CONSOLE_BUFFER
280	default 0x2f000000 if ARCH_SUNXI && MACH_SUN9I
281	default 0x4f000000 if ARCH_SUNXI && !MACH_SUN9I
282	help
283	  This sets the start address of the pre-console buffer. This must
284	  be in available memory and is accessed before relocation and
285	  possibly before DRAM is set up. Therefore choose an address
286	  carefully.
287
288	  We should consider removing this option and allocating the memory
289	  in board_init_f_init_reserve() instead.
290
291config CONSOLE_MUX
292	bool "Enable console multiplexing"
293	default y if DM_VIDEO || VIDEO || LCD
294	help
295	  This allows multiple devices to be used for each console 'file'.
296	  For example, stdout can be set to go to serial and video.
297	  Similarly, stdin can be set to come from serial and keyboard.
298	  Input can be provided from either source. Console multiplexing
299	  adds a small amount of size to U-Boot.  Changes to the environment
300	  variables stdout, stdin and stderr will take effect immediately.
301
302config SYS_CONSOLE_IS_IN_ENV
303	bool "Select console devices from the environment"
304	default y if CONSOLE_MUX
305	help
306	  This allows multiple input/output devices to be set at boot time.
307	  For example, if stdout is set to "serial,video" then output will
308	  be sent to both the serial and video devices on boot. The
309	  environment variables can be updated after boot to change the
310	  input/output devices.
311
312config SYS_CONSOLE_OVERWRITE_ROUTINE
313	bool "Allow board control over console overwriting"
314	help
315	  If this is enabled, and the board-specific function
316	  overwrite_console() returns 1, the stdin, stderr and stdout are
317	  switched to the serial port, else the settings in the environment
318	  are used. If this is not enabled, the console will not be switched
319	  to serial.
320
321config SYS_CONSOLE_ENV_OVERWRITE
322	bool "Update environment variables during console init"
323	help
324	  The console environment variables (stdout, stdin, stderr) can be
325	  used to determine the correct console devices on start-up. This
326	  option writes the console devices to these variables on console
327	  start-up (after relocation). This causes the environment to be
328	  updated to match the console devices actually chosen.
329
330config SYS_CONSOLE_INFO_QUIET
331	bool "Don't display the console devices on boot"
332	help
333	  Normally U-Boot displays the current settings for stdout, stdin
334	  and stderr on boot when the post-relocation console is set up.
335	  Enable this option to supress this output. It can be obtained by
336	  calling stdio_print_current_devices() from board code.
337
338config SYS_STDIO_DEREGISTER
339	bool "Allow deregistering stdio devices"
340	default y if USB_KEYBOARD
341	help
342	  Generally there is no need to deregister stdio devices since they
343	  are never deactivated. But if a stdio device is used which can be
344	  removed (for example a USB keyboard) then this option can be
345	  enabled to ensure this is handled correctly.
346
347endmenu
348
349config DEFAULT_FDT_FILE
350	string "Default fdt file"
351	help
352	  This option is used to set the default fdt file to boot OS.
353
354config SYS_NO_FLASH
355	bool "Disable support for parallel NOR flash"
356	default n
357	help
358	  This option is used to disable support for parallel NOR flash.
359
360config VERSION_VARIABLE
361	bool "add U-Boot environment variable vers"
362	default n
363	help
364	  If this variable is defined, an environment variable
365	  named "ver" is created by U-Boot showing the U-Boot
366	  version as printed by the "version" command.
367	  Any change to this variable will be reverted at the
368	  next reset.
369
370config DISPLAY_CPUINFO
371	bool "Display information about the CPU during start up"
372	default y if ARM || BLACKFIN || NIOS2 || X86 || XTENSA
373	help
374	  Display information about the CPU that U-Boot is running on
375	  when U-Boot starts up. The function print_cpuinfo() is called
376	  to do this.
377
378config DISPLAY_BOARDINFO
379	bool "Display information about the board during start up"
380	default y if ARM || M68K || MIPS || PPC || SPARC || XTENSA
381	help
382	  Display information about the board that U-Boot is running on
383	  when U-Boot starts up. The board function checkboard() is called
384	  to do this.
385
386source "common/spl/Kconfig"
387