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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
Shawn Guo34e8a162013-05-03 11:21:03 +0800254 config DEBUG_IMX6SL_UART
255 bool "i.MX6SL Debug UART"
256 depends on SOC_IMX6SL
257 help
258 Say Y here if you want kernel low-level debugging support
259 on i.MX6SL.
260
Santosh Shilimkar828989a2013-06-10 11:27:13 -0400261 config DEBUG_KEYSTONE_UART0
262 bool "Kernel low-level debugging on KEYSTONE2 using UART0"
263 depends on ARCH_KEYSTONE
264 help
265 Say Y here if you want the debug print routines to direct
266 their output to UART0 serial port on KEYSTONE2 devices.
267
268 config DEBUG_KEYSTONE_UART1
269 bool "Kernel low-level debugging on KEYSTONE2 using UART1"
270 depends on ARCH_KEYSTONE
271 help
272 Say Y here if you want the debug print routines to direct
273 their output to UART1 serial port on KEYSTONE2 devices.
274
Haojian Zhuangfa4cd2a2012-08-10 23:49:41 +0800275 config DEBUG_MMP_UART2
276 bool "Kernel low-level debugging message via MMP UART2"
277 depends on ARCH_MMP
278 help
279 Say Y here if you want kernel low-level debugging support
280 on MMP UART2.
281
282 config DEBUG_MMP_UART3
283 bool "Kernel low-level debugging message via MMP UART3"
284 depends on ARCH_MMP
285 help
286 Say Y here if you want kernel low-level debugging support
287 on MMP UART3.
288
Stephen Boyd650e3f02011-11-08 10:33:03 -0800289 config DEBUG_MSM_UART1
290 bool "Kernel low-level debugging messages via MSM UART1"
291 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
292 help
293 Say Y here if you want the debug print routines to direct
294 their output to the first serial port on MSM devices.
295
296 config DEBUG_MSM_UART2
297 bool "Kernel low-level debugging messages via MSM UART2"
298 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
299 help
300 Say Y here if you want the debug print routines to direct
301 their output to the second serial port on MSM devices.
302
303 config DEBUG_MSM_UART3
304 bool "Kernel low-level debugging messages via MSM UART3"
305 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
306 help
307 Say Y here if you want the debug print routines to direct
308 their output to the third serial port on MSM devices.
309
Stephen Boyda3d3ef92011-11-08 10:33:04 -0800310 config DEBUG_MSM8660_UART
311 bool "Kernel low-level debugging messages via MSM 8660 UART"
312 depends on ARCH_MSM8X60
313 select MSM_HAS_DEBUG_UART_HS
314 help
315 Say Y here if you want the debug print routines to direct
316 their output to the serial port on MSM 8660 devices.
317
318 config DEBUG_MSM8960_UART
319 bool "Kernel low-level debugging messages via MSM 8960 UART"
320 depends on ARCH_MSM8960
321 select MSM_HAS_DEBUG_UART_HS
322 help
323 Say Y here if you want the debug print routines to direct
324 their output to the serial port on MSM 8960 devices.
325
Rob Herringbfd5af92012-09-02 14:41:34 -0500326 config DEBUG_MVEBU_UART
Thomas Petazzonic2804cd2013-06-05 09:05:00 +0200327 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
Rob Herringbfd5af92012-09-02 14:41:34 -0500328 depends on ARCH_MVEBU
329 help
330 Say Y here if you want kernel low-level debugging support
331 on MVEBU based platforms.
332
Thomas Petazzonic2804cd2013-06-05 09:05:00 +0200333 This option should be used with the old bootloaders
334 that left the internal registers mapped at
335 0xd0000000. As of today, this is the case on
336 platforms such as the Globalscale Mirabox or the
337 Plathome OpenBlocks AX3, when using the original
338 bootloader.
339
340 If the wrong DEBUG_MVEBU_UART* option is selected,
341 when u-boot hands over to the kernel, the system
342 silently crashes, with no serial output at all.
343
344 config DEBUG_MVEBU_UART_ALTERNATE
345 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
346 depends on ARCH_MVEBU
347 help
348 Say Y here if you want kernel low-level debugging support
349 on MVEBU based platforms.
350
351 This option should be used with the new bootloaders
352 that remap the internal registers at 0xf1000000.
353
354 If the wrong DEBUG_MVEBU_UART* option is selected,
355 when u-boot hands over to the kernel, the system
356 silently crashes, with no serial output at all.
357
Linus Walleij266c3472013-02-27 22:39:57 +0100358 config DEBUG_NOMADIK_UART
359 bool "Kernel low-level debugging messages via NOMADIK UART"
360 depends on ARCH_NOMADIK
361 help
362 Say Y here if you want kernel low-level debugging support
363 on NOMADIK based platforms.
364
Daniel Tang9851ca52013-06-11 18:40:17 +1000365 config DEBUG_NSPIRE_CLASSIC_UART
366 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
367 depends on ARCH_NSPIRE
368 help
369 Say Y here if you want kernel low-level debugging support
370 on TI-NSPIRE classic models.
371
372 config DEBUG_NSPIRE_CX_UART
373 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
374 depends on ARCH_NSPIRE
375 help
376 Say Y here if you want kernel low-level debugging support
377 on TI-NSPIRE CX models.
378
Tony Lindgren808b7e02013-01-11 11:24:19 -0800379 config DEBUG_OMAP2PLUS_UART
380 bool "Kernel low-level debugging messages via OMAP2PLUS UART"
381 depends on ARCH_OMAP2PLUS
382 help
383 Say Y here if you want kernel low-level debugging support
384 on OMAP2PLUS based platforms.
385
Rob Herring59bba2a2012-09-06 14:14:46 -0500386 config DEBUG_PICOXCELL_UART
387 depends on ARCH_PICOXCELL
388 bool "Use PicoXcell UART for low-level debug"
389 help
390 Say Y here if you want kernel low-level debugging support
391 on PicoXcell based platforms.
392
Haojian Zhuang0a43cd32013-04-10 11:17:04 +0800393 config DEBUG_PXA_UART1
394 depends on ARCH_PXA
395 bool "Use PXA UART1 for low-level debug"
396 help
397 Say Y here if you want kernel low-level debugging support
398 on PXA UART1.
399
Russell Kinge76f4752011-11-23 17:44:05 +0000400 config DEBUG_REALVIEW_STD_PORT
401 bool "RealView Default UART"
402 depends on ARCH_REALVIEW
403 help
404 Say Y here if you want the debug print routines to direct
405 their output to the serial port on RealView EB, PB11MP, PBA8
406 and PBX platforms.
407
408 config DEBUG_REALVIEW_PB1176_PORT
409 bool "RealView PB1176 UART"
410 depends on MACH_REALVIEW_PB1176
411 help
412 Say Y here if you want the debug print routines to direct
413 their output to the standard serial port on the RealView
414 PB1176 platform.
415
Heiko Stuebner38bd6892013-05-28 22:13:52 +0200416 config DEBUG_ROCKCHIP_UART
417 bool "Kernel low-level debugging messages via Rockchip UART"
418 depends on ARCH_ROCKCHIP
419 help
420 Say Y here if you want kernel low-level debugging support
421 on Rockchip based platforms.
422
Russell Kinge76f4752011-11-23 17:44:05 +0000423 config DEBUG_S3C_UART0
424 depends on PLAT_SAMSUNG
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100425 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
Russell Kinge76f4752011-11-23 17:44:05 +0000426 bool "Use S3C UART 0 for low-level debug"
427 help
428 Say Y here if you want the debug print routines to direct
429 their output to UART 0. The port must have been initialised
430 by the boot-loader before use.
431
432 The uncompressor code port configuration is now handled
433 by CONFIG_S3C_LOWLEVEL_UART_PORT.
434
435 config DEBUG_S3C_UART1
436 depends on PLAT_SAMSUNG
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100437 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
Russell Kinge76f4752011-11-23 17:44:05 +0000438 bool "Use S3C UART 1 for low-level debug"
439 help
440 Say Y here if you want the debug print routines to direct
441 their output to UART 1. The port must have been initialised
442 by the boot-loader before use.
443
444 The uncompressor code port configuration is now handled
445 by CONFIG_S3C_LOWLEVEL_UART_PORT.
446
447 config DEBUG_S3C_UART2
448 depends on PLAT_SAMSUNG
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100449 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
Russell Kinge76f4752011-11-23 17:44:05 +0000450 bool "Use S3C UART 2 for low-level debug"
451 help
452 Say Y here if you want the debug print routines to direct
453 their output to UART 2. The port must have been initialised
454 by the boot-loader before use.
455
456 The uncompressor code port configuration is now handled
457 by CONFIG_S3C_LOWLEVEL_UART_PORT.
458
Olof Johansson5fa23dd2012-11-22 14:24:04 +0900459 config DEBUG_S3C_UART3
460 depends on PLAT_SAMSUNG && ARCH_EXYNOS
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100461 select DEBUG_EXYNOS_UART
Olof Johansson5fa23dd2012-11-22 14:24:04 +0900462 bool "Use S3C UART 3 for low-level debug"
463 help
464 Say Y here if you want the debug print routines to direct
465 their output to UART 3. The port must have been initialised
466 by the boot-loader before use.
467
468 The uncompressor code port configuration is now handled
469 by CONFIG_S3C_LOWLEVEL_UART_PORT.
470
Rob Herring6111bf72012-09-06 14:11:28 -0500471 config DEBUG_SOCFPGA_UART
472 depends on ARCH_SOCFPGA
473 bool "Use SOCFPGA UART for low-level debug"
474 help
475 Say Y here if you want kernel low-level debugging support
476 on SOCFPGA based platforms.
477
Stefan Roeseaa251152012-11-19 12:09:41 +0100478 config DEBUG_SUNXI_UART0
479 bool "Kernel low-level debugging messages via sunXi UART0"
480 depends on ARCH_SUNXI
481 help
482 Say Y here if you want kernel low-level debugging support
483 on Allwinner A1X based platforms on the UART0.
484
Maxime Ripardcb84fa12012-11-08 12:40:49 +0100485 config DEBUG_SUNXI_UART1
486 bool "Kernel low-level debugging messages via sunXi UART1"
487 depends on ARCH_SUNXI
488 help
489 Say Y here if you want kernel low-level debugging support
490 on Allwinner A1X based platforms on the UART1.
491
Stephen Warren46067802012-09-25 15:54:56 -0600492 config DEBUG_TEGRA_UART
493 depends on ARCH_TEGRA
494 bool "Use Tegra UART for low-level debug"
495 help
496 Say Y here if you want kernel low-level debugging support
497 on Tegra based platforms.
498
Barry Song7f46a102012-12-20 19:45:25 +0800499 config DEBUG_SIRFPRIMA2_UART1
500 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
501 depends on ARCH_PRIMA2
502 help
503 Say Y here if you want the debug print routines to direct
504 their output to the uart1 port on SiRFprimaII devices.
505
506 config DEBUG_SIRFMARCO_UART1
507 bool "Kernel low-level debugging messages via SiRFmarco UART1"
508 depends on ARCH_MARCO
509 help
510 Say Y here if you want the debug print routines to direct
511 their output to the uart1 port on SiRFmarco devices.
512
Arnd Bergmann5562b802013-07-05 16:08:44 +0200513 config DEBUG_STI_UART
514 depends on ARCH_STI
515 bool "Use StiH415/416 ASC for low-level debug"
516 help
517 Say Y here if you want kernel low-level debugging support
518 on StiH415/416 based platforms like B2000, B2020.
519 It support UART2 and SBC_UART1.
520
521 If unsure, say N.
522
Linus Walleijdd324da2013-05-02 16:34:19 +0200523 config DEBUG_U300_UART
524 bool "Kernel low-level debugging messages via U300 UART0"
525 depends on ARCH_U300
526 help
527 Say Y here if you want the debug print routines to direct
528 their output to the uart port on U300 devices.
529
Linus Walleijf87b95d2013-03-19 11:01:36 +0100530 config DEBUG_UX500_UART
531 depends on ARCH_U8500
532 bool "Use Ux500 UART for low-level debug"
533 help
534 Say Y here if you want kernel low-level debugging support
535 on Ux500 based platforms.
536
Pawel Moll1b820ea2012-07-11 17:07:25 +0100537 config DEBUG_VEXPRESS_UART0_DETECT
538 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
539 depends on ARCH_VEXPRESS && CPU_CP15_MMU
540 help
541 This option enables a simple heuristic which tries to determine
542 the motherboard's memory map variant (original or RS1) and then
543 choose the relevant UART0 base address.
544
545 Note that this will only work with standard A-class core tiles,
546 and may fail with non-standard SMM or custom software models.
547
548 config DEBUG_VEXPRESS_UART0_CA9
549 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
550 depends on ARCH_VEXPRESS
551 help
552 This option selects UART0 at 0x10009000. Except for custom models,
553 this applies only to the V2P-CA9 tile.
554
555 config DEBUG_VEXPRESS_UART0_RS1
556 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
557 depends on ARCH_VEXPRESS
558 help
559 This option selects UART0 at 0x1c090000. This applies to most
560 of the tiles using the RS1 memory map, including all new A-class
561 core tiles, FPGA-based SMMs and software models.
562
Jonathan Austined18bdc2012-08-30 13:46:44 +0100563 config DEBUG_VEXPRESS_UART0_CRX
564 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
565 depends on ARCH_VEXPRESS && !MMU
566 help
567 This option selects UART0 at 0xb0090000. This is appropriate for
568 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
569
Tony Priskb61a2722012-12-28 12:09:18 +1300570 config DEBUG_VT8500_UART0
571 bool "Use UART0 on VIA/Wondermedia SoCs"
572 depends on ARCH_VT8500
573 help
574 This option selects UART0 on VIA/Wondermedia System-on-a-chip
575 devices, including VT8500, WM8505, WM8650 and WM8850.
576
Russell Kinge76f4752011-11-23 17:44:05 +0000577 config DEBUG_LL_UART_NONE
578 bool "No low-level debugging UART"
Rob Herring387798b2012-09-06 13:41:12 -0500579 depends on !ARCH_MULTIPLATFORM
Russell Kinge76f4752011-11-23 17:44:05 +0000580 help
581 Say Y here if your platform doesn't provide a UART option
582 below. This relies on your platform choosing the right UART
583 definition internally in order for low-level debugging to
584 work.
585
586 config DEBUG_ICEDCC
587 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
588 help
589 Say Y here if you want the debug print routines to direct
590 their output to the EmbeddedICE macrocell's DCC channel using
591 co-processor 14. This is known to work on the ARM9 style ICE
592 channel and on the XScale with the PEEDI.
593
594 Note that the system will appear to hang during boot if there
595 is nothing connected to read from the DCC.
596
Russell Kingb0df8982012-03-27 11:30:31 +0100597 config DEBUG_SEMIHOSTING
Stephen Boyd62194bd2012-09-06 21:24:32 +0100598 bool "Kernel low-level debug output via semihosting I/O"
Russell Kingb0df8982012-03-27 11:30:31 +0100599 help
600 Semihosting enables code running on an ARM target to use
601 the I/O facilities on a host debugger/emulator through a
Stephen Boyd62194bd2012-09-06 21:24:32 +0100602 simple SVC call. The host debugger or emulator must have
Russell Kingb0df8982012-03-27 11:30:31 +0100603 semihosting enabled for the special svc call to be trapped
604 otherwise the kernel will crash.
605
Stephen Boyd62194bd2012-09-06 21:24:32 +0100606 This is known to work with OpenOCD, as well as
Russell Kingb0df8982012-03-27 11:30:31 +0100607 ARM's Fast Models, or any other controlling environment
608 that implements semihosting.
609
610 For more details about semihosting, please see
611 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
612
Will Deacon17916b22011-09-01 18:58:51 +0100613endchoice
614
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100615config DEBUG_EXYNOS_UART
616 bool
617
Shawn Guof8c95fe2012-12-12 19:03:53 +0800618config DEBUG_IMX_UART_PORT
619 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
620 DEBUG_IMX25_UART || \
621 DEBUG_IMX21_IMX27_UART || \
622 DEBUG_IMX31_UART || \
623 DEBUG_IMX35_UART || \
624 DEBUG_IMX51_UART || \
Paul Bolle0c52db72013-03-11 14:16:00 +0100625 DEBUG_IMX53_UART || \
Shawn Guo34e8a162013-05-03 11:21:03 +0800626 DEBUG_IMX6Q_UART || \
627 DEBUG_IMX6SL_UART
Shawn Guo49c9e602012-10-08 13:44:29 +0800628 default 1
Shawn Guo287939a2013-03-13 10:52:49 +0800629 depends on ARCH_MXC
Shawn Guo49c9e602012-10-08 13:44:29 +0800630 help
631 Choose UART port on which kernel low-level debug messages
632 should be output.
633
Stephen Warren46067802012-09-25 15:54:56 -0600634choice
635 prompt "Low-level debug console UART"
Tony Lindgren808b7e02013-01-11 11:24:19 -0800636 depends on DEBUG_OMAP2PLUS_UART
637
638 config DEBUG_OMAP2UART1
639 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
640 help
641 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
642 omap3 torpedo and 3530 lv som.
643
644 config DEBUG_OMAP2UART2
645 bool "OMAP2/3/4 UART2"
646
647 config DEBUG_OMAP2UART3
648 bool "OMAP2 UART3 (n8x0)"
649
650 config DEBUG_OMAP3UART3
651 bool "OMAP3 UART3 (most omap3 boards)"
652 help
653 This covers at least cm_t3x, beagle, crane, devkit8000,
654 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
655 and 3517evm.
656
657 config DEBUG_OMAP4UART3
658 bool "OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
659
660 config DEBUG_OMAP3UART4
661 bool "OMAP36XX UART4"
662
663 config DEBUG_OMAP4UART4
664 bool "OMAP4/5 UART4"
665
666 config DEBUG_TI81XXUART1
667 bool "TI81XX UART1 (ti8148evm)"
668
669 config DEBUG_TI81XXUART2
670 bool "TI81XX UART2"
671
672 config DEBUG_TI81XXUART3
673 bool "TI81XX UART3 (ti8168evm)"
674
675 config DEBUG_AM33XXUART1
676 bool "AM33XX UART1"
677
678 config DEBUG_ZOOM_UART
679 bool "Zoom2/3 UART"
680endchoice
681
682choice
683 prompt "Low-level debug console UART"
Heiko Stuebner38bd6892013-05-28 22:13:52 +0200684 depends on DEBUG_ROCKCHIP_UART
685
686 config DEBUG_RK29_UART0
687 bool "RK29 UART0"
688
689 config DEBUG_RK29_UART1
690 bool "RK29 UART1"
691
692 config DEBUG_RK29_UART2
693 bool "RK29 UART2"
694
695 config DEBUG_RK3X_UART0
696 bool "RK3X UART0"
697
698 config DEBUG_RK3X_UART1
699 bool "RK3X UART1"
700
701 config DEBUG_RK3X_UART2
702 bool "RK3X UART2"
703
704 config DEBUG_RK3X_UART3
705 bool "RK3X UART3"
706endchoice
707
708choice
709 prompt "Low-level debug console UART"
Stephen Warren46067802012-09-25 15:54:56 -0600710 depends on DEBUG_LL && DEBUG_TEGRA_UART
711
712 config TEGRA_DEBUG_UART_AUTO_ODMDATA
713 bool "Via ODMDATA"
714 help
715 Automatically determines which UART to use for low-level debug based
716 on the ODMDATA value. This value is part of the BCT, and is written
717 to the boot memory device using nvflash, or other flashing tool.
718 When bits 19:18 are 3, then bits 17:15 indicate which UART to use;
719 0/1/2/3/4 are UART A/B/C/D/E.
720
721 config TEGRA_DEBUG_UARTA
722 bool "UART A"
723
724 config TEGRA_DEBUG_UARTB
725 bool "UART B"
726
727 config TEGRA_DEBUG_UARTC
728 bool "UART C"
729
730 config TEGRA_DEBUG_UARTD
731 bool "UART D"
732
733 config TEGRA_DEBUG_UARTE
734 bool "UART E"
735
736endchoice
737
Srinivas Kandagatla5026aec2013-06-25 12:15:32 +0100738choice
739 prompt "Low-level debug console UART"
740 depends on DEBUG_LL && DEBUG_STI_UART
741
742 config STIH41X_DEBUG_ASC2
743 bool "ASC2 UART"
744 help
745 Say Y here if you want kernel low-level debugging support
746 on STiH415/416 based platforms like b2000, which has
747 default UART wired up to ASC2.
748
749 If unsure, say N.
750
751 config STIH41X_DEBUG_SBC_ASC1
752 bool "SBC ASC1 UART"
753 help
754 Say Y here if you want kernel low-level debugging support
755 on STiH415/416 based platforms like b2020. which has
756 default UART wired up to SBC ASC1.
757
758 If unsure, say N.
759
760endchoice
761
Rob Herring91a9fec2012-08-31 00:03:46 -0500762config DEBUG_LL_INCLUDE
763 string
Stephen Warrenf1ac9222013-03-11 22:40:18 -0600764 default "debug/bcm2835.S" if DEBUG_BCM2835
Arnd Bergmann29c9b7b2013-03-14 16:02:59 +0100765 default "debug/cns3xxx.S" if DEBUG_CNS3XXX
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100766 default "debug/exynos.S" if DEBUG_EXYNOS_UART
Linus Torvalds150a8dc2013-05-04 12:34:30 -0700767 default "debug/highbank.S" if DEBUG_HIGHBANK_UART
Rob Herring91a9fec2012-08-31 00:03:46 -0500768 default "debug/icedcc.S" if DEBUG_ICEDCC
Shawn Guo6dde5ac2012-09-16 20:50:45 +0800769 default "debug/imx.S" if DEBUG_IMX1_UART || \
770 DEBUG_IMX25_UART || \
771 DEBUG_IMX21_IMX27_UART || \
Shawn Guo4ad625d2012-12-12 18:54:01 +0800772 DEBUG_IMX31_UART || \
773 DEBUG_IMX35_UART || \
Shawn Guo6dde5ac2012-09-16 20:50:45 +0800774 DEBUG_IMX51_UART || \
Fabio Estevam7356420c2013-01-22 10:40:55 -0200775 DEBUG_IMX53_UART ||\
Shawn Guo34e8a162013-05-03 11:21:03 +0800776 DEBUG_IMX6Q_UART || \
777 DEBUG_IMX6SL_UART
Santosh Shilimkar828989a2013-06-10 11:27:13 -0400778 default "debug/keystone.S" if DEBUG_KEYSTONE_UART0 || \
779 DEBUG_KEYSTONE_UART1
Thomas Petazzonic2804cd2013-06-05 09:05:00 +0200780 default "debug/mvebu.S" if DEBUG_MVEBU_UART || \
781 DEBUG_MVEBU_UART_ALTERNATE
Shawn Guoe91411b2013-03-29 14:30:07 +0800782 default "debug/mxs.S" if DEBUG_IMX23_UART || DEBUG_IMX28_UART
Linus Walleij266c3472013-02-27 22:39:57 +0100783 default "debug/nomadik.S" if DEBUG_NOMADIK_UART
Linus Torvalds42daabf2013-07-02 14:42:51 -0700784 default "debug/nspire.S" if DEBUG_NSPIRE_CX_UART || \
785 DEBUG_NSPIRE_CLASSIC_UART
Tony Lindgren808b7e02013-01-11 11:24:19 -0800786 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
Rob Herring59bba2a2012-09-06 14:14:46 -0500787 default "debug/picoxcell.S" if DEBUG_PICOXCELL_UART
Haojian Zhuang0a43cd32013-04-10 11:17:04 +0800788 default "debug/pxa.S" if DEBUG_PXA_UART1 || DEBUG_MMP_UART2 || \
789 DEBUG_MMP_UART3
Heiko Stuebner38bd6892013-05-28 22:13:52 +0200790 default "debug/rockchip.S" if DEBUG_ROCKCHIP_UART
Arnd Bergmann67bdb282013-03-19 13:52:14 +0100791 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
Rob Herring6111bf72012-09-06 14:11:28 -0500792 default "debug/socfpga.S" if DEBUG_SOCFPGA_UART
Srinivas Kandagatla5026aec2013-06-25 12:15:32 +0100793 default "debug/sti.S" if DEBUG_STI_UART
Stefan Roeseaa251152012-11-19 12:09:41 +0100794 default "debug/sunxi.S" if DEBUG_SUNXI_UART0 || DEBUG_SUNXI_UART1
Linus Torvalds150a8dc2013-05-04 12:34:30 -0700795 default "debug/tegra.S" if DEBUG_TEGRA_UART
Linus Walleijdd324da2013-05-02 16:34:19 +0200796 default "debug/u300.S" if DEBUG_U300_UART
Linus Torvalds150a8dc2013-05-04 12:34:30 -0700797 default "debug/ux500.S" if DEBUG_UX500_UART
Rob Herringfa04e4d2012-08-31 00:08:21 -0500798 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT || \
Jonathan Austined18bdc2012-08-30 13:46:44 +0100799 DEBUG_VEXPRESS_UART0_CA9 || DEBUG_VEXPRESS_UART0_RS1 || \
800 DEBUG_VEXPRESS_UART0_CRX
Tony Priskb61a2722012-12-28 12:09:18 +1300801 default "debug/vt8500.S" if DEBUG_VT8500_UART0
Josh Cartwright385f02b2012-11-19 10:16:01 -0600802 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
Rob Herring91a9fec2012-08-31 00:03:46 -0500803 default "mach/debug-macro.S"
804
Shawn Guo3b4af9b2013-03-14 08:48:06 +0100805config DEBUG_UNCOMPRESS
806 bool
807 default y if ARCH_MULTIPLATFORM && DEBUG_LL && \
808 !DEBUG_OMAP2PLUS_UART && \
809 !DEBUG_TEGRA_UART
810
Shawn Guo615967b2013-03-14 08:47:27 +0100811config UNCOMPRESS_INCLUDE
812 string
813 default "debug/uncompress.h" if ARCH_MULTIPLATFORM
814 default "mach/uncompress.h"
815
Catalin Marinas93fd03a2009-12-09 10:02:18 +0000816config EARLY_PRINTK
817 bool "Early printk"
818 depends on DEBUG_LL
819 help
820 Say Y here if you want to have an early console using the
821 kernel low-level debugging functions. Add earlyprintk to your
822 kernel parameters to enable this console.
823
Alexander Shishkinc5d6c772009-12-01 14:00:51 +0100824config OC_ETM
825 bool "On-chip ETM and ETB"
Arnd Bergmann53eebb02011-09-07 10:02:35 +0200826 depends on ARM_AMBA
Alexander Shishkinc5d6c772009-12-01 14:00:51 +0100827 help
828 Enables the on-chip embedded trace macrocell and embedded trace
829 buffer driver that will allow you to collect traces of the
830 kernel code.
831
Jon Medhurst4189bc72011-08-27 12:36:58 +0100832config ARM_KPROBES_TEST
833 tristate "Kprobes test module"
834 depends on KPROBES && MODULES
835 help
836 Perform tests of kprobes API and instruction set simulation.
837
Will Deacon575320d2012-07-06 15:43:03 +0100838config PID_IN_CONTEXTIDR
839 bool "Write the current PID to the CONTEXTIDR register"
840 depends on CPU_COPY_V6
841 help
842 Enabling this option causes the kernel to write the current PID to
843 the PROCID field of the CONTEXTIDR register, at the expense of some
844 additional instructions during context switch. Say Y here only if you
845 are planning to use hardware trace tools with this kernel.
846
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847endmenu