blob: e6a6ab1b10d7948f64aecc3bdf583a29df913822 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001menu "Kernel hacking"
2
3source "lib/Kconfig.debug"
4
Nicolas Pitre087aaff2010-09-22 18:34:36 -04005config STRICT_DEVMEM
6 bool "Filter access to /dev/mem"
7 depends on MMU
8 ---help---
9 If this option is disabled, you allow userspace (root) access to all
10 of memory, including kernel and userspace memory. Accidental
11 access to this is obviously disastrous, but specific access can
12 be used by people debugging the kernel.
13
14 If this option is switched on, the /dev/mem file only allows
15 userspace access to memory mapped peripherals.
16
17 If in doubt, say Y.
18
Catalin Marinasadf8b372009-02-12 13:56:34 +010019# RMK wants arm kernels compiled with frame pointers or stack unwinding.
Linus Torvalds1da177e2005-04-16 15:20:36 -070020# If you know what you are doing and are willing to live without stack
21# traces, you can get a slightly smaller kernel by setting this option to
22# n, but then RMK will have to kill you ;).
23config FRAME_POINTER
24 bool
Catalin Marinas16c79652009-07-24 12:33:02 +010025 depends on !THUMB2_KERNEL
Rabin Vincent0e341af2010-11-06 23:03:53 +053026 default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 help
28 If you say N here, the resulting kernel will be slightly smaller and
Catalin Marinasadf8b372009-02-12 13:56:34 +010029 faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
30 when a problem occurs with the kernel, the information that is
31 reported is severely limited.
32
33config ARM_UNWIND
Russell King4a50bfe2010-12-05 23:06:22 +000034 bool "Enable stack unwinding support (EXPERIMENTAL)"
Kees Cookd6f94fa2013-01-16 18:53:14 -080035 depends on AEABI
Catalin Marinasadf8b372009-02-12 13:56:34 +010036 default y
37 help
38 This option enables stack unwinding support in the kernel
39 using the information automatically generated by the
40 compiler. The resulting kernel image is slightly bigger but
41 the performance is not affected. Currently, this feature
42 only works with EABI compilers. If unsure say Y.
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Rabin Vincent09bfafa2010-08-10 19:32:37 +010044config OLD_MCOUNT
45 bool
46 depends on FUNCTION_TRACER && FRAME_POINTER
47 default y
48
Linus Torvalds1da177e2005-04-16 15:20:36 -070049config DEBUG_USER
50 bool "Verbose user fault messages"
51 help
52 When a user program crashes due to an exception, the kernel can
53 print a brief message explaining what the problem was. This is
54 sometimes helpful for debugging but serves no purpose on a
55 production system. Most people should say N here.
56
57 In addition, you need to pass user_debug=N on the kernel command
58 line to enable this feature. N consists of the sum of:
59
60 1 - undefined instruction events
61 2 - system calls
62 4 - invalid data aborts
63 8 - SIGSEGV faults
64 16 - SIGBUS faults
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066# These options are only for real kernel hackers who want to get their hands dirty.
67config DEBUG_LL
Will Deacon4f5ef922011-09-01 19:04:44 +010068 bool "Kernel low-level debugging functions (read help!)"
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 depends on DEBUG_KERNEL
70 help
Russell King35efb602005-09-09 15:57:17 +010071 Say Y here to include definitions of printascii, printch, printhex
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 in the kernel. This is helpful if you are debugging code that
73 executes before the console is initialized.
74
Will Deacon4f5ef922011-09-01 19:04:44 +010075 Note that selecting this option will limit the kernel to a single
76 UART definition, as specified below. Attempting to boot the kernel
77 image on a different platform *will not work*, so this option should
78 not be enabled for kernels that are intended to be portable.
79
Will Deacon17916b22011-09-01 18:58:51 +010080choice
81 prompt "Kernel low-level debugging port"
82 depends on DEBUG_LL
83
Jean-Christophe PLAGNIOL-VILLARD13079a72011-11-02 01:43:31 +080084 config AT91_DEBUG_LL_DBGU0
85 bool "Kernel low-level debugging on rm9200, 9260/9g20, 9261/9g10 and 9rl"
86 depends on HAVE_AT91_DBGU0
87
88 config AT91_DEBUG_LL_DBGU1
Jean-Christophe PLAGNIOL-VILLARD9918cea2012-01-26 14:07:09 +010089 bool "Kernel low-level debugging on 9263 and 9g45"
Jean-Christophe PLAGNIOL-VILLARD13079a72011-11-02 01:43:31 +080090 depends on HAVE_AT91_DBGU1
91
Stephen Warrenf1ac9222013-03-11 22:40:18 -060092 config DEBUG_BCM2835
93 bool "Kernel low-level debugging on BCM2835 PL011 UART"
94 depends on ARCH_BCM2835
95
Stephen Boyd164acf92011-09-22 20:28:35 +010096 config DEBUG_CLPS711X_UART1
97 bool "Kernel low-level debugging messages via UART1"
98 depends on ARCH_CLPS711X
99 help
100 Say Y here if you want the debug print routines to direct
101 their output to the first serial port on these devices.
Will Deacon17916b22011-09-01 18:58:51 +0100102
103 config DEBUG_CLPS711X_UART2
104 bool "Kernel low-level debugging messages via UART2"
105 depends on ARCH_CLPS711X
106 help
107 Say Y here if you want the debug print routines to direct
108 their output to the second serial port on these devices.
Will Deacon17916b22011-09-01 18:58:51 +0100109
Arnd Bergmann29c9b7b2013-03-14 16:02:59 +0100110 config DEBUG_CNS3XXX
111 bool "Kernel Kernel low-level debugging on Cavium Networks CNS3xxx"
112 depends on ARCH_CNS3XXX
113 help
114 Say Y here if you want the debug print routines to direct
115 their output to the CNS3xxx UART0.
116
Uwe Kleine-König477099f2012-03-22 10:29:23 +0100117 config DEBUG_DAVINCI_DA8XX_UART1
118 bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
119 depends on ARCH_DAVINCI_DA8XX
120 help
121 Say Y here if you want the debug print routines to direct
122 their output to UART1 serial port on DaVinci DA8XX devices.
123
124 config DEBUG_DAVINCI_DA8XX_UART2
125 bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
126 depends on ARCH_DAVINCI_DA8XX
127 help
128 Say Y here if you want the debug print routines to direct
129 their output to UART2 serial port on DaVinci DA8XX devices.
130
131 config DEBUG_DAVINCI_DMx_UART0
132 bool "Kernel low-level debugging on DaVinci DMx using UART0"
133 depends on ARCH_DAVINCI_DMx
134 help
135 Say Y here if you want the debug print routines to direct
136 their output to UART0 serial port on DaVinci DMx devices.
137
138 config DEBUG_DAVINCI_TNETV107X_UART1
139 bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
140 depends on ARCH_DAVINCI_TNETV107X
141 help
142 Say Y here if you want the debug print routines to direct
143 their output to UART1 serial port on DaVinci TNETV107X
144 devices.
145
Nick Bowleraaf5e0b2012-11-05 16:45:49 -0500146 config DEBUG_ZYNQ_UART0
147 bool "Kernel low-level debugging on Xilinx Zynq using UART0"
148 depends on ARCH_ZYNQ
149 help
150 Say Y here if you want the debug print routines to direct
151 their output to UART0 on the Zynq platform.
152
153 config DEBUG_ZYNQ_UART1
154 bool "Kernel low-level debugging on Xilinx Zynq using UART1"
155 depends on ARCH_ZYNQ
156 help
157 Say Y here if you want the debug print routines to direct
158 their output to UART1 on the Zynq platform.
159
160 If you have a ZC702 board and want early boot messages to
161 appear on the USB serial adaptor, select this option.
162
Russell Kinge76f4752011-11-23 17:44:05 +0000163 config DEBUG_DC21285_PORT
164 bool "Kernel low-level debugging messages via footbridge serial port"
165 depends on FOOTBRIDGE
166 help
167 Say Y here if you want the debug print routines to direct
168 their output to the serial port in the DC21285 (Footbridge).
169
170 config DEBUG_FOOTBRIDGE_COM1
171 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
172 depends on FOOTBRIDGE
173 help
174 Say Y here if you want the debug print routines to direct
175 their output to the 8250 at PCI COM1.
176
Rob Herring220e6cf2011-06-07 10:02:55 -0500177 config DEBUG_HIGHBANK_UART
178 bool "Kernel low-level debugging messages via Highbank UART"
179 depends on ARCH_HIGHBANK
180 help
181 Say Y here if you want the debug print routines to direct
182 their output to the UART on Highbank based devices.
183
Shawn Guof350b862011-08-19 05:56:59 +0100184 config DEBUG_IMX1_UART
185 bool "i.MX1 Debug UART"
186 depends on SOC_IMX1
187 help
188 Say Y here if you want kernel low-level debugging support
189 on i.MX1.
190
191 config DEBUG_IMX23_UART
192 bool "i.MX23 Debug UART"
193 depends on SOC_IMX23
194 help
195 Say Y here if you want kernel low-level debugging support
196 on i.MX23.
197
198 config DEBUG_IMX25_UART
199 bool "i.MX25 Debug UART"
200 depends on SOC_IMX25
201 help
202 Say Y here if you want kernel low-level debugging support
203 on i.MX25.
204
205 config DEBUG_IMX21_IMX27_UART
206 bool "i.MX21 and i.MX27 Debug UART"
207 depends on SOC_IMX21 || SOC_IMX27
208 help
209 Say Y here if you want kernel low-level debugging support
210 on i.MX21 or i.MX27.
211
212 config DEBUG_IMX28_UART
213 bool "i.MX28 Debug UART"
214 depends on SOC_IMX28
215 help
216 Say Y here if you want kernel low-level debugging support
217 on i.MX28.
218
Shawn Guo4ad625d2012-12-12 18:54:01 +0800219 config DEBUG_IMX31_UART
220 bool "i.MX31 Debug UART"
221 depends on SOC_IMX31
Shawn Guof350b862011-08-19 05:56:59 +0100222 help
223 Say Y here if you want kernel low-level debugging support
Shawn Guo4ad625d2012-12-12 18:54:01 +0800224 on i.MX31.
225
226 config DEBUG_IMX35_UART
227 bool "i.MX35 Debug UART"
228 depends on SOC_IMX35
229 help
230 Say Y here if you want kernel low-level debugging support
231 on i.MX35.
Shawn Guof350b862011-08-19 05:56:59 +0100232
233 config DEBUG_IMX51_UART
234 bool "i.MX51 Debug UART"
235 depends on SOC_IMX51
236 help
237 Say Y here if you want kernel low-level debugging support
238 on i.MX51.
239
Fabio Estevam7356420c2013-01-22 10:40:55 -0200240 config DEBUG_IMX53_UART
241 bool "i.MX53 Debug UART"
242 depends on SOC_IMX53
Shawn Guof350b862011-08-19 05:56:59 +0100243 help
244 Say Y here if you want kernel low-level debugging support
Fabio Estevam7356420c2013-01-22 10:40:55 -0200245 on i.MX53.
Shawn Guof350b862011-08-19 05:56:59 +0100246
Shawn Guo49c9e602012-10-08 13:44:29 +0800247 config DEBUG_IMX6Q_UART
Shawn Guo3c03a2f2013-04-01 22:13:32 +0800248 bool "i.MX6Q/DL Debug UART"
Dirk Behme785d7fa2012-04-27 10:15:45 +0200249 depends on SOC_IMX6Q
250 help
251 Say Y here if you want kernel low-level debugging support
Shawn Guo3c03a2f2013-04-01 22:13:32 +0800252 on i.MX6Q/DL.
Shawn Guobac89d72011-10-02 15:09:11 +0800253
Haojian Zhuangfa4cd2a2012-08-10 23:49:41 +0800254 config DEBUG_MMP_UART2
255 bool "Kernel low-level debugging message via MMP UART2"
256 depends on ARCH_MMP
257 help
258 Say Y here if you want kernel low-level debugging support
259 on MMP UART2.
260
261 config DEBUG_MMP_UART3
262 bool "Kernel low-level debugging message via MMP UART3"
263 depends on ARCH_MMP
264 help
265 Say Y here if you want kernel low-level debugging support
266 on MMP UART3.
267
Stephen Boyd650e3f02011-11-08 10:33:03 -0800268 config DEBUG_MSM_UART1
269 bool "Kernel low-level debugging messages via MSM UART1"
270 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
271 help
272 Say Y here if you want the debug print routines to direct
273 their output to the first serial port on MSM devices.
274
275 config DEBUG_MSM_UART2
276 bool "Kernel low-level debugging messages via MSM UART2"
277 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
278 help
279 Say Y here if you want the debug print routines to direct
280 their output to the second serial port on MSM devices.
281
282 config DEBUG_MSM_UART3
283 bool "Kernel low-level debugging messages via MSM UART3"
284 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
285 help
286 Say Y here if you want the debug print routines to direct
287 their output to the third serial port on MSM devices.
288
Stephen Boyda3d3ef92011-11-08 10:33:04 -0800289 config DEBUG_MSM8660_UART
290 bool "Kernel low-level debugging messages via MSM 8660 UART"
291 depends on ARCH_MSM8X60
292 select MSM_HAS_DEBUG_UART_HS
293 help
294 Say Y here if you want the debug print routines to direct
295 their output to the serial port on MSM 8660 devices.
296
297 config DEBUG_MSM8960_UART
298 bool "Kernel low-level debugging messages via MSM 8960 UART"
299 depends on ARCH_MSM8960
300 select MSM_HAS_DEBUG_UART_HS
301 help
302 Say Y here if you want the debug print routines to direct
303 their output to the serial port on MSM 8960 devices.
304
Rob Herringbfd5af92012-09-02 14:41:34 -0500305 config DEBUG_MVEBU_UART
Thomas Petazzonic2804cd2013-06-05 09:05:00 +0200306 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
Rob Herringbfd5af92012-09-02 14:41:34 -0500307 depends on ARCH_MVEBU
308 help
309 Say Y here if you want kernel low-level debugging support
310 on MVEBU based platforms.
311
Thomas Petazzonic2804cd2013-06-05 09:05:00 +0200312 This option should be used with the old bootloaders
313 that left the internal registers mapped at
314 0xd0000000. As of today, this is the case on
315 platforms such as the Globalscale Mirabox or the
316 Plathome OpenBlocks AX3, when using the original
317 bootloader.
318
319 If the wrong DEBUG_MVEBU_UART* option is selected,
320 when u-boot hands over to the kernel, the system
321 silently crashes, with no serial output at all.
322
323 config DEBUG_MVEBU_UART_ALTERNATE
324 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
325 depends on ARCH_MVEBU
326 help
327 Say Y here if you want kernel low-level debugging support
328 on MVEBU based platforms.
329
330 This option should be used with the new bootloaders
331 that remap the internal registers at 0xf1000000.
332
333 If the wrong DEBUG_MVEBU_UART* option is selected,
334 when u-boot hands over to the kernel, the system
335 silently crashes, with no serial output at all.
336
Linus Walleij266c3472013-02-27 22:39:57 +0100337 config DEBUG_NOMADIK_UART
338 bool "Kernel low-level debugging messages via NOMADIK UART"
339 depends on ARCH_NOMADIK
340 help
341 Say Y here if you want kernel low-level debugging support
342 on NOMADIK based platforms.
343
Tony Lindgren808b7e02013-01-11 11:24:19 -0800344 config DEBUG_OMAP2PLUS_UART
345 bool "Kernel low-level debugging messages via OMAP2PLUS UART"
346 depends on ARCH_OMAP2PLUS
347 help
348 Say Y here if you want kernel low-level debugging support
349 on OMAP2PLUS based platforms.
350
Rob Herring59bba2a2012-09-06 14:14:46 -0500351 config DEBUG_PICOXCELL_UART
352 depends on ARCH_PICOXCELL
353 bool "Use PicoXcell UART for low-level debug"
354 help
355 Say Y here if you want kernel low-level debugging support
356 on PicoXcell based platforms.
357
Haojian Zhuang0a43cd32013-04-10 11:17:04 +0800358 config DEBUG_PXA_UART1
359 depends on ARCH_PXA
360 bool "Use PXA UART1 for low-level debug"
361 help
362 Say Y here if you want kernel low-level debugging support
363 on PXA UART1.
364
Russell Kinge76f4752011-11-23 17:44:05 +0000365 config DEBUG_REALVIEW_STD_PORT
366 bool "RealView Default UART"
367 depends on ARCH_REALVIEW
368 help
369 Say Y here if you want the debug print routines to direct
370 their output to the serial port on RealView EB, PB11MP, PBA8
371 and PBX platforms.
372
373 config DEBUG_REALVIEW_PB1176_PORT
374 bool "RealView PB1176 UART"
375 depends on MACH_REALVIEW_PB1176
376 help
377 Say Y here if you want the debug print routines to direct
378 their output to the standard serial port on the RealView
379 PB1176 platform.
380
381 config DEBUG_S3C_UART0
382 depends on PLAT_SAMSUNG
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100383 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
Russell Kinge76f4752011-11-23 17:44:05 +0000384 bool "Use S3C UART 0 for low-level debug"
385 help
386 Say Y here if you want the debug print routines to direct
387 their output to UART 0. The port must have been initialised
388 by the boot-loader before use.
389
390 The uncompressor code port configuration is now handled
391 by CONFIG_S3C_LOWLEVEL_UART_PORT.
392
393 config DEBUG_S3C_UART1
394 depends on PLAT_SAMSUNG
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100395 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
Russell Kinge76f4752011-11-23 17:44:05 +0000396 bool "Use S3C UART 1 for low-level debug"
397 help
398 Say Y here if you want the debug print routines to direct
399 their output to UART 1. The port must have been initialised
400 by the boot-loader before use.
401
402 The uncompressor code port configuration is now handled
403 by CONFIG_S3C_LOWLEVEL_UART_PORT.
404
405 config DEBUG_S3C_UART2
406 depends on PLAT_SAMSUNG
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100407 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
Russell Kinge76f4752011-11-23 17:44:05 +0000408 bool "Use S3C UART 2 for low-level debug"
409 help
410 Say Y here if you want the debug print routines to direct
411 their output to UART 2. The port must have been initialised
412 by the boot-loader before use.
413
414 The uncompressor code port configuration is now handled
415 by CONFIG_S3C_LOWLEVEL_UART_PORT.
416
Olof Johansson5fa23dd2012-11-22 14:24:04 +0900417 config DEBUG_S3C_UART3
418 depends on PLAT_SAMSUNG && ARCH_EXYNOS
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100419 select DEBUG_EXYNOS_UART
Olof Johansson5fa23dd2012-11-22 14:24:04 +0900420 bool "Use S3C UART 3 for low-level debug"
421 help
422 Say Y here if you want the debug print routines to direct
423 their output to UART 3. The port must have been initialised
424 by the boot-loader before use.
425
426 The uncompressor code port configuration is now handled
427 by CONFIG_S3C_LOWLEVEL_UART_PORT.
428
Rob Herring6111bf72012-09-06 14:11:28 -0500429 config DEBUG_SOCFPGA_UART
430 depends on ARCH_SOCFPGA
431 bool "Use SOCFPGA UART for low-level debug"
432 help
433 Say Y here if you want kernel low-level debugging support
434 on SOCFPGA based platforms.
435
Stefan Roeseaa251152012-11-19 12:09:41 +0100436 config DEBUG_SUNXI_UART0
437 bool "Kernel low-level debugging messages via sunXi UART0"
438 depends on ARCH_SUNXI
439 help
440 Say Y here if you want kernel low-level debugging support
441 on Allwinner A1X based platforms on the UART0.
442
Maxime Ripardcb84fa12012-11-08 12:40:49 +0100443 config DEBUG_SUNXI_UART1
444 bool "Kernel low-level debugging messages via sunXi UART1"
445 depends on ARCH_SUNXI
446 help
447 Say Y here if you want kernel low-level debugging support
448 on Allwinner A1X based platforms on the UART1.
449
Stephen Warren46067802012-09-25 15:54:56 -0600450 config DEBUG_TEGRA_UART
451 depends on ARCH_TEGRA
452 bool "Use Tegra UART for low-level debug"
453 help
454 Say Y here if you want kernel low-level debugging support
455 on Tegra based platforms.
456
Barry Song7f46a102012-12-20 19:45:25 +0800457 config DEBUG_SIRFPRIMA2_UART1
458 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
459 depends on ARCH_PRIMA2
460 help
461 Say Y here if you want the debug print routines to direct
462 their output to the uart1 port on SiRFprimaII devices.
463
464 config DEBUG_SIRFMARCO_UART1
465 bool "Kernel low-level debugging messages via SiRFmarco UART1"
466 depends on ARCH_MARCO
467 help
468 Say Y here if you want the debug print routines to direct
469 their output to the uart1 port on SiRFmarco devices.
470
Linus Walleijf87b95d2013-03-19 11:01:36 +0100471 config DEBUG_UX500_UART
472 depends on ARCH_U8500
473 bool "Use Ux500 UART for low-level debug"
474 help
475 Say Y here if you want kernel low-level debugging support
476 on Ux500 based platforms.
477
Pawel Moll1b820ea2012-07-11 17:07:25 +0100478 config DEBUG_VEXPRESS_UART0_DETECT
479 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
480 depends on ARCH_VEXPRESS && CPU_CP15_MMU
481 help
482 This option enables a simple heuristic which tries to determine
483 the motherboard's memory map variant (original or RS1) and then
484 choose the relevant UART0 base address.
485
486 Note that this will only work with standard A-class core tiles,
487 and may fail with non-standard SMM or custom software models.
488
489 config DEBUG_VEXPRESS_UART0_CA9
490 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
491 depends on ARCH_VEXPRESS
492 help
493 This option selects UART0 at 0x10009000. Except for custom models,
494 this applies only to the V2P-CA9 tile.
495
496 config DEBUG_VEXPRESS_UART0_RS1
497 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
498 depends on ARCH_VEXPRESS
499 help
500 This option selects UART0 at 0x1c090000. This applies to most
501 of the tiles using the RS1 memory map, including all new A-class
502 core tiles, FPGA-based SMMs and software models.
503
Tony Priskb61a2722012-12-28 12:09:18 +1300504 config DEBUG_VT8500_UART0
505 bool "Use UART0 on VIA/Wondermedia SoCs"
506 depends on ARCH_VT8500
507 help
508 This option selects UART0 on VIA/Wondermedia System-on-a-chip
509 devices, including VT8500, WM8505, WM8650 and WM8850.
510
Russell Kinge76f4752011-11-23 17:44:05 +0000511 config DEBUG_LL_UART_NONE
512 bool "No low-level debugging UART"
Rob Herring387798b2012-09-06 13:41:12 -0500513 depends on !ARCH_MULTIPLATFORM
Russell Kinge76f4752011-11-23 17:44:05 +0000514 help
515 Say Y here if your platform doesn't provide a UART option
516 below. This relies on your platform choosing the right UART
517 definition internally in order for low-level debugging to
518 work.
519
520 config DEBUG_ICEDCC
521 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
522 help
523 Say Y here if you want the debug print routines to direct
524 their output to the EmbeddedICE macrocell's DCC channel using
525 co-processor 14. This is known to work on the ARM9 style ICE
526 channel and on the XScale with the PEEDI.
527
528 Note that the system will appear to hang during boot if there
529 is nothing connected to read from the DCC.
530
Russell Kingb0df8982012-03-27 11:30:31 +0100531 config DEBUG_SEMIHOSTING
Stephen Boyd62194bd2012-09-06 21:24:32 +0100532 bool "Kernel low-level debug output via semihosting I/O"
Russell Kingb0df8982012-03-27 11:30:31 +0100533 help
534 Semihosting enables code running on an ARM target to use
535 the I/O facilities on a host debugger/emulator through a
Stephen Boyd62194bd2012-09-06 21:24:32 +0100536 simple SVC call. The host debugger or emulator must have
Russell Kingb0df8982012-03-27 11:30:31 +0100537 semihosting enabled for the special svc call to be trapped
538 otherwise the kernel will crash.
539
Stephen Boyd62194bd2012-09-06 21:24:32 +0100540 This is known to work with OpenOCD, as well as
Russell Kingb0df8982012-03-27 11:30:31 +0100541 ARM's Fast Models, or any other controlling environment
542 that implements semihosting.
543
544 For more details about semihosting, please see
545 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
546
Will Deacon17916b22011-09-01 18:58:51 +0100547endchoice
548
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100549config DEBUG_EXYNOS_UART
550 bool
551
Shawn Guof8c95fe2012-12-12 19:03:53 +0800552config DEBUG_IMX_UART_PORT
553 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
554 DEBUG_IMX25_UART || \
555 DEBUG_IMX21_IMX27_UART || \
556 DEBUG_IMX31_UART || \
557 DEBUG_IMX35_UART || \
558 DEBUG_IMX51_UART || \
Paul Bolle0c52db72013-03-11 14:16:00 +0100559 DEBUG_IMX53_UART || \
Shawn Guof8c95fe2012-12-12 19:03:53 +0800560 DEBUG_IMX6Q_UART
Shawn Guo49c9e602012-10-08 13:44:29 +0800561 default 1
Shawn Guo287939a2013-03-13 10:52:49 +0800562 depends on ARCH_MXC
Shawn Guo49c9e602012-10-08 13:44:29 +0800563 help
564 Choose UART port on which kernel low-level debug messages
565 should be output.
566
Stephen Warren46067802012-09-25 15:54:56 -0600567choice
568 prompt "Low-level debug console UART"
Tony Lindgren808b7e02013-01-11 11:24:19 -0800569 depends on DEBUG_OMAP2PLUS_UART
570
571 config DEBUG_OMAP2UART1
572 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
573 help
574 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
575 omap3 torpedo and 3530 lv som.
576
577 config DEBUG_OMAP2UART2
578 bool "OMAP2/3/4 UART2"
579
580 config DEBUG_OMAP2UART3
581 bool "OMAP2 UART3 (n8x0)"
582
583 config DEBUG_OMAP3UART3
584 bool "OMAP3 UART3 (most omap3 boards)"
585 help
586 This covers at least cm_t3x, beagle, crane, devkit8000,
587 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
588 and 3517evm.
589
590 config DEBUG_OMAP4UART3
591 bool "OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
592
593 config DEBUG_OMAP3UART4
594 bool "OMAP36XX UART4"
595
596 config DEBUG_OMAP4UART4
597 bool "OMAP4/5 UART4"
598
599 config DEBUG_TI81XXUART1
600 bool "TI81XX UART1 (ti8148evm)"
601
602 config DEBUG_TI81XXUART2
603 bool "TI81XX UART2"
604
605 config DEBUG_TI81XXUART3
606 bool "TI81XX UART3 (ti8168evm)"
607
608 config DEBUG_AM33XXUART1
609 bool "AM33XX UART1"
610
611 config DEBUG_ZOOM_UART
612 bool "Zoom2/3 UART"
613endchoice
614
615choice
616 prompt "Low-level debug console UART"
Stephen Warren46067802012-09-25 15:54:56 -0600617 depends on DEBUG_LL && DEBUG_TEGRA_UART
618
619 config TEGRA_DEBUG_UART_AUTO_ODMDATA
620 bool "Via ODMDATA"
621 help
622 Automatically determines which UART to use for low-level debug based
623 on the ODMDATA value. This value is part of the BCT, and is written
624 to the boot memory device using nvflash, or other flashing tool.
625 When bits 19:18 are 3, then bits 17:15 indicate which UART to use;
626 0/1/2/3/4 are UART A/B/C/D/E.
627
628 config TEGRA_DEBUG_UARTA
629 bool "UART A"
630
631 config TEGRA_DEBUG_UARTB
632 bool "UART B"
633
634 config TEGRA_DEBUG_UARTC
635 bool "UART C"
636
637 config TEGRA_DEBUG_UARTD
638 bool "UART D"
639
640 config TEGRA_DEBUG_UARTE
641 bool "UART E"
642
643endchoice
644
Rob Herring91a9fec2012-08-31 00:03:46 -0500645config DEBUG_LL_INCLUDE
646 string
Stephen Warrenf1ac9222013-03-11 22:40:18 -0600647 default "debug/bcm2835.S" if DEBUG_BCM2835
Arnd Bergmann29c9b7b2013-03-14 16:02:59 +0100648 default "debug/cns3xxx.S" if DEBUG_CNS3XXX
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100649 default "debug/exynos.S" if DEBUG_EXYNOS_UART
Linus Torvalds150a8dc2013-05-04 12:34:30 -0700650 default "debug/highbank.S" if DEBUG_HIGHBANK_UART
Rob Herring91a9fec2012-08-31 00:03:46 -0500651 default "debug/icedcc.S" if DEBUG_ICEDCC
Shawn Guo6dde5ac2012-09-16 20:50:45 +0800652 default "debug/imx.S" if DEBUG_IMX1_UART || \
653 DEBUG_IMX25_UART || \
654 DEBUG_IMX21_IMX27_UART || \
Shawn Guo4ad625d2012-12-12 18:54:01 +0800655 DEBUG_IMX31_UART || \
656 DEBUG_IMX35_UART || \
Shawn Guo6dde5ac2012-09-16 20:50:45 +0800657 DEBUG_IMX51_UART || \
Fabio Estevam7356420c2013-01-22 10:40:55 -0200658 DEBUG_IMX53_UART ||\
Shawn Guo49c9e602012-10-08 13:44:29 +0800659 DEBUG_IMX6Q_UART
Thomas Petazzonic2804cd2013-06-05 09:05:00 +0200660 default "debug/mvebu.S" if DEBUG_MVEBU_UART || \
661 DEBUG_MVEBU_UART_ALTERNATE
Shawn Guoe91411b2013-03-29 14:30:07 +0800662 default "debug/mxs.S" if DEBUG_IMX23_UART || DEBUG_IMX28_UART
Linus Walleij266c3472013-02-27 22:39:57 +0100663 default "debug/nomadik.S" if DEBUG_NOMADIK_UART
Tony Lindgren808b7e02013-01-11 11:24:19 -0800664 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
Rob Herring59bba2a2012-09-06 14:14:46 -0500665 default "debug/picoxcell.S" if DEBUG_PICOXCELL_UART
Haojian Zhuang0a43cd32013-04-10 11:17:04 +0800666 default "debug/pxa.S" if DEBUG_PXA_UART1 || DEBUG_MMP_UART2 || \
667 DEBUG_MMP_UART3
Arnd Bergmann67bdb282013-03-19 13:52:14 +0100668 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
Rob Herring6111bf72012-09-06 14:11:28 -0500669 default "debug/socfpga.S" if DEBUG_SOCFPGA_UART
Stefan Roeseaa251152012-11-19 12:09:41 +0100670 default "debug/sunxi.S" if DEBUG_SUNXI_UART0 || DEBUG_SUNXI_UART1
Linus Torvalds150a8dc2013-05-04 12:34:30 -0700671 default "debug/tegra.S" if DEBUG_TEGRA_UART
672 default "debug/ux500.S" if DEBUG_UX500_UART
Rob Herringfa04e4d2012-08-31 00:08:21 -0500673 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT || \
674 DEBUG_VEXPRESS_UART0_CA9 || DEBUG_VEXPRESS_UART0_RS1
Tony Priskb61a2722012-12-28 12:09:18 +1300675 default "debug/vt8500.S" if DEBUG_VT8500_UART0
Josh Cartwright385f02b2012-11-19 10:16:01 -0600676 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
Rob Herring91a9fec2012-08-31 00:03:46 -0500677 default "mach/debug-macro.S"
678
Shawn Guo3b4af9b2013-03-14 08:48:06 +0100679config DEBUG_UNCOMPRESS
680 bool
681 default y if ARCH_MULTIPLATFORM && DEBUG_LL && \
682 !DEBUG_OMAP2PLUS_UART && \
683 !DEBUG_TEGRA_UART
684
Shawn Guo615967b2013-03-14 08:47:27 +0100685config UNCOMPRESS_INCLUDE
686 string
687 default "debug/uncompress.h" if ARCH_MULTIPLATFORM
688 default "mach/uncompress.h"
689
Catalin Marinas93fd03a2009-12-09 10:02:18 +0000690config EARLY_PRINTK
691 bool "Early printk"
692 depends on DEBUG_LL
693 help
694 Say Y here if you want to have an early console using the
695 kernel low-level debugging functions. Add earlyprintk to your
696 kernel parameters to enable this console.
697
Alexander Shishkinc5d6c772009-12-01 14:00:51 +0100698config OC_ETM
699 bool "On-chip ETM and ETB"
Arnd Bergmann53eebb02011-09-07 10:02:35 +0200700 depends on ARM_AMBA
Alexander Shishkinc5d6c772009-12-01 14:00:51 +0100701 help
702 Enables the on-chip embedded trace macrocell and embedded trace
703 buffer driver that will allow you to collect traces of the
704 kernel code.
705
Jon Medhurst4189bc72011-08-27 12:36:58 +0100706config ARM_KPROBES_TEST
707 tristate "Kprobes test module"
708 depends on KPROBES && MODULES
709 help
710 Perform tests of kprobes API and instruction set simulation.
711
Will Deacon575320d2012-07-06 15:43:03 +0100712config PID_IN_CONTEXTIDR
713 bool "Write the current PID to the CONTEXTIDR register"
714 depends on CPU_COPY_V6
715 help
716 Enabling this option causes the kernel to write the current PID to
717 the PROCID field of the CONTEXTIDR register, at the expense of some
718 additional instructions during context switch. Say Y here only if you
719 are planning to use hardware trace tools with this kernel.
720
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721endmenu