blob: 311f6f36517353c12ec54d9e05b84248902aea2a [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
306 bool "Kernel low-level debugging messages via MVEBU UART"
307 depends on ARCH_MVEBU
308 help
309 Say Y here if you want kernel low-level debugging support
310 on MVEBU based platforms.
311
Linus Walleij266c3472013-02-27 22:39:57 +0100312 config DEBUG_NOMADIK_UART
313 bool "Kernel low-level debugging messages via NOMADIK UART"
314 depends on ARCH_NOMADIK
315 help
316 Say Y here if you want kernel low-level debugging support
317 on NOMADIK based platforms.
318
Tony Lindgren808b7e02013-01-11 11:24:19 -0800319 config DEBUG_OMAP2PLUS_UART
320 bool "Kernel low-level debugging messages via OMAP2PLUS UART"
321 depends on ARCH_OMAP2PLUS
322 help
323 Say Y here if you want kernel low-level debugging support
324 on OMAP2PLUS based platforms.
325
Rob Herring59bba2a2012-09-06 14:14:46 -0500326 config DEBUG_PICOXCELL_UART
327 depends on ARCH_PICOXCELL
328 bool "Use PicoXcell UART for low-level debug"
329 help
330 Say Y here if you want kernel low-level debugging support
331 on PicoXcell based platforms.
332
Haojian Zhuang0a43cd32013-04-10 11:17:04 +0800333 config DEBUG_PXA_UART1
334 depends on ARCH_PXA
335 bool "Use PXA UART1 for low-level debug"
336 help
337 Say Y here if you want kernel low-level debugging support
338 on PXA UART1.
339
Russell Kinge76f4752011-11-23 17:44:05 +0000340 config DEBUG_REALVIEW_STD_PORT
341 bool "RealView Default UART"
342 depends on ARCH_REALVIEW
343 help
344 Say Y here if you want the debug print routines to direct
345 their output to the serial port on RealView EB, PB11MP, PBA8
346 and PBX platforms.
347
348 config DEBUG_REALVIEW_PB1176_PORT
349 bool "RealView PB1176 UART"
350 depends on MACH_REALVIEW_PB1176
351 help
352 Say Y here if you want the debug print routines to direct
353 their output to the standard serial port on the RealView
354 PB1176 platform.
355
356 config DEBUG_S3C_UART0
357 depends on PLAT_SAMSUNG
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100358 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
Russell Kinge76f4752011-11-23 17:44:05 +0000359 bool "Use S3C UART 0 for low-level debug"
360 help
361 Say Y here if you want the debug print routines to direct
362 their output to UART 0. The port must have been initialised
363 by the boot-loader before use.
364
365 The uncompressor code port configuration is now handled
366 by CONFIG_S3C_LOWLEVEL_UART_PORT.
367
368 config DEBUG_S3C_UART1
369 depends on PLAT_SAMSUNG
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100370 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
Russell Kinge76f4752011-11-23 17:44:05 +0000371 bool "Use S3C UART 1 for low-level debug"
372 help
373 Say Y here if you want the debug print routines to direct
374 their output to UART 1. The port must have been initialised
375 by the boot-loader before use.
376
377 The uncompressor code port configuration is now handled
378 by CONFIG_S3C_LOWLEVEL_UART_PORT.
379
380 config DEBUG_S3C_UART2
381 depends on PLAT_SAMSUNG
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100382 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
Russell Kinge76f4752011-11-23 17:44:05 +0000383 bool "Use S3C UART 2 for low-level debug"
384 help
385 Say Y here if you want the debug print routines to direct
386 their output to UART 2. The port must have been initialised
387 by the boot-loader before use.
388
389 The uncompressor code port configuration is now handled
390 by CONFIG_S3C_LOWLEVEL_UART_PORT.
391
Olof Johansson5fa23dd2012-11-22 14:24:04 +0900392 config DEBUG_S3C_UART3
393 depends on PLAT_SAMSUNG && ARCH_EXYNOS
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100394 select DEBUG_EXYNOS_UART
Olof Johansson5fa23dd2012-11-22 14:24:04 +0900395 bool "Use S3C UART 3 for low-level debug"
396 help
397 Say Y here if you want the debug print routines to direct
398 their output to UART 3. The port must have been initialised
399 by the boot-loader before use.
400
401 The uncompressor code port configuration is now handled
402 by CONFIG_S3C_LOWLEVEL_UART_PORT.
403
Rob Herring6111bf72012-09-06 14:11:28 -0500404 config DEBUG_SOCFPGA_UART
405 depends on ARCH_SOCFPGA
406 bool "Use SOCFPGA UART for low-level debug"
407 help
408 Say Y here if you want kernel low-level debugging support
409 on SOCFPGA based platforms.
410
Stefan Roeseaa251152012-11-19 12:09:41 +0100411 config DEBUG_SUNXI_UART0
412 bool "Kernel low-level debugging messages via sunXi UART0"
413 depends on ARCH_SUNXI
414 help
415 Say Y here if you want kernel low-level debugging support
416 on Allwinner A1X based platforms on the UART0.
417
Maxime Ripardcb84fa12012-11-08 12:40:49 +0100418 config DEBUG_SUNXI_UART1
419 bool "Kernel low-level debugging messages via sunXi UART1"
420 depends on ARCH_SUNXI
421 help
422 Say Y here if you want kernel low-level debugging support
423 on Allwinner A1X based platforms on the UART1.
424
Stephen Warren46067802012-09-25 15:54:56 -0600425 config DEBUG_TEGRA_UART
426 depends on ARCH_TEGRA
427 bool "Use Tegra UART for low-level debug"
428 help
429 Say Y here if you want kernel low-level debugging support
430 on Tegra based platforms.
431
Barry Song7f46a102012-12-20 19:45:25 +0800432 config DEBUG_SIRFPRIMA2_UART1
433 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
434 depends on ARCH_PRIMA2
435 help
436 Say Y here if you want the debug print routines to direct
437 their output to the uart1 port on SiRFprimaII devices.
438
439 config DEBUG_SIRFMARCO_UART1
440 bool "Kernel low-level debugging messages via SiRFmarco UART1"
441 depends on ARCH_MARCO
442 help
443 Say Y here if you want the debug print routines to direct
444 their output to the uart1 port on SiRFmarco devices.
445
Linus Walleijf87b95d2013-03-19 11:01:36 +0100446 config DEBUG_UX500_UART
447 depends on ARCH_U8500
448 bool "Use Ux500 UART for low-level debug"
449 help
450 Say Y here if you want kernel low-level debugging support
451 on Ux500 based platforms.
452
Pawel Moll1b820ea2012-07-11 17:07:25 +0100453 config DEBUG_VEXPRESS_UART0_DETECT
454 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
455 depends on ARCH_VEXPRESS && CPU_CP15_MMU
456 help
457 This option enables a simple heuristic which tries to determine
458 the motherboard's memory map variant (original or RS1) and then
459 choose the relevant UART0 base address.
460
461 Note that this will only work with standard A-class core tiles,
462 and may fail with non-standard SMM or custom software models.
463
464 config DEBUG_VEXPRESS_UART0_CA9
465 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
466 depends on ARCH_VEXPRESS
467 help
468 This option selects UART0 at 0x10009000. Except for custom models,
469 this applies only to the V2P-CA9 tile.
470
471 config DEBUG_VEXPRESS_UART0_RS1
472 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
473 depends on ARCH_VEXPRESS
474 help
475 This option selects UART0 at 0x1c090000. This applies to most
476 of the tiles using the RS1 memory map, including all new A-class
477 core tiles, FPGA-based SMMs and software models.
478
Tony Priskb61a2722012-12-28 12:09:18 +1300479 config DEBUG_VT8500_UART0
480 bool "Use UART0 on VIA/Wondermedia SoCs"
481 depends on ARCH_VT8500
482 help
483 This option selects UART0 on VIA/Wondermedia System-on-a-chip
484 devices, including VT8500, WM8505, WM8650 and WM8850.
485
Srinivas Kandagatla5026aec2013-06-25 12:15:32 +0100486 config DEBUG_STI_UART
487 depends on ARCH_STI
488 bool "Use StiH415/416 ASC for low-level debug"
489 help
490 Say Y here if you want kernel low-level debugging support
491 on StiH415/416 based platforms like B2000, B2020.
492 It support UART2 and SBC_UART1.
493
494 If unsure, say N.
495
Russell Kinge76f4752011-11-23 17:44:05 +0000496 config DEBUG_LL_UART_NONE
497 bool "No low-level debugging UART"
Rob Herring387798b2012-09-06 13:41:12 -0500498 depends on !ARCH_MULTIPLATFORM
Russell Kinge76f4752011-11-23 17:44:05 +0000499 help
500 Say Y here if your platform doesn't provide a UART option
501 below. This relies on your platform choosing the right UART
502 definition internally in order for low-level debugging to
503 work.
504
505 config DEBUG_ICEDCC
506 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
507 help
508 Say Y here if you want the debug print routines to direct
509 their output to the EmbeddedICE macrocell's DCC channel using
510 co-processor 14. This is known to work on the ARM9 style ICE
511 channel and on the XScale with the PEEDI.
512
513 Note that the system will appear to hang during boot if there
514 is nothing connected to read from the DCC.
515
Russell Kingb0df8982012-03-27 11:30:31 +0100516 config DEBUG_SEMIHOSTING
Stephen Boyd62194bd2012-09-06 21:24:32 +0100517 bool "Kernel low-level debug output via semihosting I/O"
Russell Kingb0df8982012-03-27 11:30:31 +0100518 help
519 Semihosting enables code running on an ARM target to use
520 the I/O facilities on a host debugger/emulator through a
Stephen Boyd62194bd2012-09-06 21:24:32 +0100521 simple SVC call. The host debugger or emulator must have
Russell Kingb0df8982012-03-27 11:30:31 +0100522 semihosting enabled for the special svc call to be trapped
523 otherwise the kernel will crash.
524
Stephen Boyd62194bd2012-09-06 21:24:32 +0100525 This is known to work with OpenOCD, as well as
Russell Kingb0df8982012-03-27 11:30:31 +0100526 ARM's Fast Models, or any other controlling environment
527 that implements semihosting.
528
529 For more details about semihosting, please see
530 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
531
Will Deacon17916b22011-09-01 18:58:51 +0100532endchoice
533
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100534config DEBUG_EXYNOS_UART
535 bool
536
Shawn Guof8c95fe2012-12-12 19:03:53 +0800537config DEBUG_IMX_UART_PORT
538 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
539 DEBUG_IMX25_UART || \
540 DEBUG_IMX21_IMX27_UART || \
541 DEBUG_IMX31_UART || \
542 DEBUG_IMX35_UART || \
543 DEBUG_IMX51_UART || \
Paul Bolle0c52db72013-03-11 14:16:00 +0100544 DEBUG_IMX53_UART || \
Shawn Guof8c95fe2012-12-12 19:03:53 +0800545 DEBUG_IMX6Q_UART
Shawn Guo49c9e602012-10-08 13:44:29 +0800546 default 1
Shawn Guo287939a2013-03-13 10:52:49 +0800547 depends on ARCH_MXC
Shawn Guo49c9e602012-10-08 13:44:29 +0800548 help
549 Choose UART port on which kernel low-level debug messages
550 should be output.
551
Stephen Warren46067802012-09-25 15:54:56 -0600552choice
553 prompt "Low-level debug console UART"
Tony Lindgren808b7e02013-01-11 11:24:19 -0800554 depends on DEBUG_OMAP2PLUS_UART
555
556 config DEBUG_OMAP2UART1
557 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
558 help
559 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
560 omap3 torpedo and 3530 lv som.
561
562 config DEBUG_OMAP2UART2
563 bool "OMAP2/3/4 UART2"
564
565 config DEBUG_OMAP2UART3
566 bool "OMAP2 UART3 (n8x0)"
567
568 config DEBUG_OMAP3UART3
569 bool "OMAP3 UART3 (most omap3 boards)"
570 help
571 This covers at least cm_t3x, beagle, crane, devkit8000,
572 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
573 and 3517evm.
574
575 config DEBUG_OMAP4UART3
576 bool "OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
577
578 config DEBUG_OMAP3UART4
579 bool "OMAP36XX UART4"
580
581 config DEBUG_OMAP4UART4
582 bool "OMAP4/5 UART4"
583
584 config DEBUG_TI81XXUART1
585 bool "TI81XX UART1 (ti8148evm)"
586
587 config DEBUG_TI81XXUART2
588 bool "TI81XX UART2"
589
590 config DEBUG_TI81XXUART3
591 bool "TI81XX UART3 (ti8168evm)"
592
593 config DEBUG_AM33XXUART1
594 bool "AM33XX UART1"
595
596 config DEBUG_ZOOM_UART
597 bool "Zoom2/3 UART"
598endchoice
599
600choice
601 prompt "Low-level debug console UART"
Stephen Warren46067802012-09-25 15:54:56 -0600602 depends on DEBUG_LL && DEBUG_TEGRA_UART
603
604 config TEGRA_DEBUG_UART_AUTO_ODMDATA
605 bool "Via ODMDATA"
606 help
607 Automatically determines which UART to use for low-level debug based
608 on the ODMDATA value. This value is part of the BCT, and is written
609 to the boot memory device using nvflash, or other flashing tool.
610 When bits 19:18 are 3, then bits 17:15 indicate which UART to use;
611 0/1/2/3/4 are UART A/B/C/D/E.
612
613 config TEGRA_DEBUG_UARTA
614 bool "UART A"
615
616 config TEGRA_DEBUG_UARTB
617 bool "UART B"
618
619 config TEGRA_DEBUG_UARTC
620 bool "UART C"
621
622 config TEGRA_DEBUG_UARTD
623 bool "UART D"
624
625 config TEGRA_DEBUG_UARTE
626 bool "UART E"
627
628endchoice
629
Srinivas Kandagatla5026aec2013-06-25 12:15:32 +0100630choice
631 prompt "Low-level debug console UART"
632 depends on DEBUG_LL && DEBUG_STI_UART
633
634 config STIH41X_DEBUG_ASC2
635 bool "ASC2 UART"
636 help
637 Say Y here if you want kernel low-level debugging support
638 on STiH415/416 based platforms like b2000, which has
639 default UART wired up to ASC2.
640
641 If unsure, say N.
642
643 config STIH41X_DEBUG_SBC_ASC1
644 bool "SBC ASC1 UART"
645 help
646 Say Y here if you want kernel low-level debugging support
647 on STiH415/416 based platforms like b2020. which has
648 default UART wired up to SBC ASC1.
649
650 If unsure, say N.
651
652endchoice
653
Rob Herring91a9fec2012-08-31 00:03:46 -0500654config DEBUG_LL_INCLUDE
655 string
Stephen Warrenf1ac9222013-03-11 22:40:18 -0600656 default "debug/bcm2835.S" if DEBUG_BCM2835
Arnd Bergmann29c9b7b2013-03-14 16:02:59 +0100657 default "debug/cns3xxx.S" if DEBUG_CNS3XXX
Arnd Bergmanna2e40712013-03-04 18:03:10 +0100658 default "debug/exynos.S" if DEBUG_EXYNOS_UART
Linus Torvalds150a8dc2013-05-04 12:34:30 -0700659 default "debug/highbank.S" if DEBUG_HIGHBANK_UART
Rob Herring91a9fec2012-08-31 00:03:46 -0500660 default "debug/icedcc.S" if DEBUG_ICEDCC
Shawn Guo6dde5ac2012-09-16 20:50:45 +0800661 default "debug/imx.S" if DEBUG_IMX1_UART || \
662 DEBUG_IMX25_UART || \
663 DEBUG_IMX21_IMX27_UART || \
Shawn Guo4ad625d2012-12-12 18:54:01 +0800664 DEBUG_IMX31_UART || \
665 DEBUG_IMX35_UART || \
Shawn Guo6dde5ac2012-09-16 20:50:45 +0800666 DEBUG_IMX51_UART || \
Fabio Estevam7356420c2013-01-22 10:40:55 -0200667 DEBUG_IMX53_UART ||\
Shawn Guo49c9e602012-10-08 13:44:29 +0800668 DEBUG_IMX6Q_UART
Rob Herringbfd5af92012-09-02 14:41:34 -0500669 default "debug/mvebu.S" if DEBUG_MVEBU_UART
Shawn Guoe91411b2013-03-29 14:30:07 +0800670 default "debug/mxs.S" if DEBUG_IMX23_UART || DEBUG_IMX28_UART
Linus Walleij266c3472013-02-27 22:39:57 +0100671 default "debug/nomadik.S" if DEBUG_NOMADIK_UART
Tony Lindgren808b7e02013-01-11 11:24:19 -0800672 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
Rob Herring59bba2a2012-09-06 14:14:46 -0500673 default "debug/picoxcell.S" if DEBUG_PICOXCELL_UART
Haojian Zhuang0a43cd32013-04-10 11:17:04 +0800674 default "debug/pxa.S" if DEBUG_PXA_UART1 || DEBUG_MMP_UART2 || \
675 DEBUG_MMP_UART3
Arnd Bergmann67bdb282013-03-19 13:52:14 +0100676 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
Rob Herring6111bf72012-09-06 14:11:28 -0500677 default "debug/socfpga.S" if DEBUG_SOCFPGA_UART
Srinivas Kandagatla5026aec2013-06-25 12:15:32 +0100678 default "debug/sti.S" if DEBUG_STI_UART
Stefan Roeseaa251152012-11-19 12:09:41 +0100679 default "debug/sunxi.S" if DEBUG_SUNXI_UART0 || DEBUG_SUNXI_UART1
Linus Torvalds150a8dc2013-05-04 12:34:30 -0700680 default "debug/tegra.S" if DEBUG_TEGRA_UART
681 default "debug/ux500.S" if DEBUG_UX500_UART
Rob Herringfa04e4d2012-08-31 00:08:21 -0500682 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT || \
683 DEBUG_VEXPRESS_UART0_CA9 || DEBUG_VEXPRESS_UART0_RS1
Tony Priskb61a2722012-12-28 12:09:18 +1300684 default "debug/vt8500.S" if DEBUG_VT8500_UART0
Josh Cartwright385f02b2012-11-19 10:16:01 -0600685 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
Rob Herring91a9fec2012-08-31 00:03:46 -0500686 default "mach/debug-macro.S"
687
Shawn Guo3b4af9b2013-03-14 08:48:06 +0100688config DEBUG_UNCOMPRESS
689 bool
690 default y if ARCH_MULTIPLATFORM && DEBUG_LL && \
691 !DEBUG_OMAP2PLUS_UART && \
692 !DEBUG_TEGRA_UART
693
Shawn Guo615967b2013-03-14 08:47:27 +0100694config UNCOMPRESS_INCLUDE
695 string
696 default "debug/uncompress.h" if ARCH_MULTIPLATFORM
697 default "mach/uncompress.h"
698
Catalin Marinas93fd03a2009-12-09 10:02:18 +0000699config EARLY_PRINTK
700 bool "Early printk"
701 depends on DEBUG_LL
702 help
703 Say Y here if you want to have an early console using the
704 kernel low-level debugging functions. Add earlyprintk to your
705 kernel parameters to enable this console.
706
Alexander Shishkinc5d6c772009-12-01 14:00:51 +0100707config OC_ETM
708 bool "On-chip ETM and ETB"
Arnd Bergmann53eebb02011-09-07 10:02:35 +0200709 depends on ARM_AMBA
Alexander Shishkinc5d6c772009-12-01 14:00:51 +0100710 help
711 Enables the on-chip embedded trace macrocell and embedded trace
712 buffer driver that will allow you to collect traces of the
713 kernel code.
714
Jon Medhurst4189bc72011-08-27 12:36:58 +0100715config ARM_KPROBES_TEST
716 tristate "Kprobes test module"
717 depends on KPROBES && MODULES
718 help
719 Perform tests of kprobes API and instruction set simulation.
720
Will Deacon575320d2012-07-06 15:43:03 +0100721config PID_IN_CONTEXTIDR
722 bool "Write the current PID to the CONTEXTIDR register"
723 depends on CPU_COPY_V6
724 help
725 Enabling this option causes the kernel to write the current PID to
726 the PROCID field of the CONTEXTIDR register, at the expense of some
727 additional instructions during context switch. Say Y here only if you
728 are planning to use hardware trace tools with this kernel.
729
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730endmenu