3 source "lib/Kconfig.debug"
6 bool "Filter access to /dev/mem"
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.
14 If this option is switched on, the /dev/mem file only allows
15 userspace access to memory mapped peripherals.
19 # RMK wants arm kernels compiled with frame pointers or stack unwinding.
20 # 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 ;).
25 depends on !THUMB2_KERNEL
26 default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
28 If you say N here, the resulting kernel will be slightly smaller and
29 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.
34 bool "Enable stack unwinding support (EXPERIMENTAL)"
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.
46 depends on FUNCTION_TRACER && FRAME_POINTER
50 bool "Verbose user fault messages"
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.
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:
60 1 - undefined instruction events
62 4 - invalid data aborts
66 # These options are only for real kernel hackers who want to get their hands dirty.
68 bool "Kernel low-level debugging functions (read help!)"
69 depends on DEBUG_KERNEL
71 Say Y here to include definitions of printascii, printch, printhex
72 in the kernel. This is helpful if you are debugging code that
73 executes before the console is initialized.
75 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.
81 prompt "Kernel low-level debugging port"
84 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
88 config AT91_DEBUG_LL_DBGU1
89 bool "Kernel low-level debugging on 9263 and 9g45"
90 depends on HAVE_AT91_DBGU1
93 bool "Kernel low-level debugging on BCM2835 PL011 UART"
94 depends on ARCH_BCM2835
96 config DEBUG_CLPS711X_UART1
97 bool "Kernel low-level debugging messages via UART1"
98 depends on ARCH_CLPS711X
100 Say Y here if you want the debug print routines to direct
101 their output to the first serial port on these devices.
103 config DEBUG_CLPS711X_UART2
104 bool "Kernel low-level debugging messages via UART2"
105 depends on ARCH_CLPS711X
107 Say Y here if you want the debug print routines to direct
108 their output to the second serial port on these devices.
111 bool "Kernel Kernel low-level debugging on Cavium Networks CNS3xxx"
112 depends on ARCH_CNS3XXX
114 Say Y here if you want the debug print routines to direct
115 their output to the CNS3xxx UART0.
117 config DEBUG_DAVINCI_DA8XX_UART1
118 bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
119 depends on ARCH_DAVINCI_DA8XX
121 Say Y here if you want the debug print routines to direct
122 their output to UART1 serial port on DaVinci DA8XX devices.
124 config DEBUG_DAVINCI_DA8XX_UART2
125 bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
126 depends on ARCH_DAVINCI_DA8XX
128 Say Y here if you want the debug print routines to direct
129 their output to UART2 serial port on DaVinci DA8XX devices.
131 config DEBUG_DAVINCI_DMx_UART0
132 bool "Kernel low-level debugging on DaVinci DMx using UART0"
133 depends on ARCH_DAVINCI_DMx
135 Say Y here if you want the debug print routines to direct
136 their output to UART0 serial port on DaVinci DMx devices.
138 config DEBUG_DAVINCI_TNETV107X_UART1
139 bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
140 depends on ARCH_DAVINCI_TNETV107X
142 Say Y here if you want the debug print routines to direct
143 their output to UART1 serial port on DaVinci TNETV107X
146 config DEBUG_ZYNQ_UART0
147 bool "Kernel low-level debugging on Xilinx Zynq using UART0"
150 Say Y here if you want the debug print routines to direct
151 their output to UART0 on the Zynq platform.
153 config DEBUG_ZYNQ_UART1
154 bool "Kernel low-level debugging on Xilinx Zynq using UART1"
157 Say Y here if you want the debug print routines to direct
158 their output to UART1 on the Zynq platform.
160 If you have a ZC702 board and want early boot messages to
161 appear on the USB serial adaptor, select this option.
163 config DEBUG_DC21285_PORT
164 bool "Kernel low-level debugging messages via footbridge serial port"
165 depends on FOOTBRIDGE
167 Say Y here if you want the debug print routines to direct
168 their output to the serial port in the DC21285 (Footbridge).
170 config DEBUG_FOOTBRIDGE_COM1
171 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
172 depends on FOOTBRIDGE
174 Say Y here if you want the debug print routines to direct
175 their output to the 8250 at PCI COM1.
177 config DEBUG_HIGHBANK_UART
178 bool "Kernel low-level debugging messages via Highbank UART"
179 depends on ARCH_HIGHBANK
181 Say Y here if you want the debug print routines to direct
182 their output to the UART on Highbank based devices.
184 config DEBUG_IMX1_UART
185 bool "i.MX1 Debug UART"
188 Say Y here if you want kernel low-level debugging support
191 config DEBUG_IMX23_UART
192 bool "i.MX23 Debug UART"
195 Say Y here if you want kernel low-level debugging support
198 config DEBUG_IMX25_UART
199 bool "i.MX25 Debug UART"
202 Say Y here if you want kernel low-level debugging support
205 config DEBUG_IMX21_IMX27_UART
206 bool "i.MX21 and i.MX27 Debug UART"
207 depends on SOC_IMX21 || SOC_IMX27
209 Say Y here if you want kernel low-level debugging support
212 config DEBUG_IMX28_UART
213 bool "i.MX28 Debug UART"
216 Say Y here if you want kernel low-level debugging support
219 config DEBUG_IMX31_UART
220 bool "i.MX31 Debug UART"
223 Say Y here if you want kernel low-level debugging support
226 config DEBUG_IMX35_UART
227 bool "i.MX35 Debug UART"
230 Say Y here if you want kernel low-level debugging support
233 config DEBUG_IMX51_UART
234 bool "i.MX51 Debug UART"
237 Say Y here if you want kernel low-level debugging support
240 config DEBUG_IMX53_UART
241 bool "i.MX53 Debug UART"
244 Say Y here if you want kernel low-level debugging support
247 config DEBUG_IMX6Q_UART
248 bool "i.MX6Q/DL Debug UART"
251 Say Y here if you want kernel low-level debugging support
254 config DEBUG_IMX6SL_UART
255 bool "i.MX6SL Debug UART"
256 depends on SOC_IMX6SL
258 Say Y here if you want kernel low-level debugging support
261 config DEBUG_KEYSTONE_UART0
262 bool "Kernel low-level debugging on KEYSTONE2 using UART0"
263 depends on ARCH_KEYSTONE
265 Say Y here if you want the debug print routines to direct
266 their output to UART0 serial port on KEYSTONE2 devices.
268 config DEBUG_KEYSTONE_UART1
269 bool "Kernel low-level debugging on KEYSTONE2 using UART1"
270 depends on ARCH_KEYSTONE
272 Say Y here if you want the debug print routines to direct
273 their output to UART1 serial port on KEYSTONE2 devices.
275 config DEBUG_MMP_UART2
276 bool "Kernel low-level debugging message via MMP UART2"
279 Say Y here if you want kernel low-level debugging support
282 config DEBUG_MMP_UART3
283 bool "Kernel low-level debugging message via MMP UART3"
286 Say Y here if you want kernel low-level debugging support
289 config DEBUG_MSM_UART1
290 bool "Kernel low-level debugging messages via MSM UART1"
291 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
293 Say Y here if you want the debug print routines to direct
294 their output to the first serial port on MSM devices.
296 config DEBUG_MSM_UART2
297 bool "Kernel low-level debugging messages via MSM UART2"
298 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
300 Say Y here if you want the debug print routines to direct
301 their output to the second serial port on MSM devices.
303 config DEBUG_MSM_UART3
304 bool "Kernel low-level debugging messages via MSM UART3"
305 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
307 Say Y here if you want the debug print routines to direct
308 their output to the third serial port on MSM devices.
310 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
315 Say Y here if you want the debug print routines to direct
316 their output to the serial port on MSM 8660 devices.
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
323 Say Y here if you want the debug print routines to direct
324 their output to the serial port on MSM 8960 devices.
326 config DEBUG_MVEBU_UART
327 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
328 depends on ARCH_MVEBU
330 Say Y here if you want kernel low-level debugging support
331 on MVEBU based platforms.
333 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
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.
344 config DEBUG_MVEBU_UART_ALTERNATE
345 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
346 depends on ARCH_MVEBU
348 Say Y here if you want kernel low-level debugging support
349 on MVEBU based platforms.
351 This option should be used with the new bootloaders
352 that remap the internal registers at 0xf1000000.
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.
358 config DEBUG_NOMADIK_UART
359 bool "Kernel low-level debugging messages via NOMADIK UART"
360 depends on ARCH_NOMADIK
362 Say Y here if you want kernel low-level debugging support
363 on NOMADIK based platforms.
365 config DEBUG_NSPIRE_CLASSIC_UART
366 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
367 depends on ARCH_NSPIRE
369 Say Y here if you want kernel low-level debugging support
370 on TI-NSPIRE classic models.
372 config DEBUG_NSPIRE_CX_UART
373 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
374 depends on ARCH_NSPIRE
376 Say Y here if you want kernel low-level debugging support
377 on TI-NSPIRE CX models.
379 config DEBUG_OMAP2UART1
380 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
381 depends on ARCH_OMAP2PLUS
382 select DEBUG_OMAP2PLUS_UART
384 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
385 omap3 torpedo and 3530 lv som.
387 config DEBUG_OMAP2UART2
388 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
389 depends on ARCH_OMAP2PLUS
390 select DEBUG_OMAP2PLUS_UART
392 config DEBUG_OMAP2UART3
393 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
394 depends on ARCH_OMAP2PLUS
395 select DEBUG_OMAP2PLUS_UART
397 config DEBUG_OMAP3UART3
398 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
399 depends on ARCH_OMAP2PLUS
400 select DEBUG_OMAP2PLUS_UART
402 This covers at least cm_t3x, beagle, crane, devkit8000,
403 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
406 config DEBUG_OMAP4UART3
407 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
408 depends on ARCH_OMAP2PLUS
409 select DEBUG_OMAP2PLUS_UART
411 config DEBUG_OMAP3UART4
412 bool "Kernel low-level debugging messages via OMAP36XX UART4"
413 depends on ARCH_OMAP2PLUS
414 select DEBUG_OMAP2PLUS_UART
416 config DEBUG_OMAP4UART4
417 bool "Kernel low-level debugging messages via OMAP4/5 UART4"
418 depends on ARCH_OMAP2PLUS
419 select DEBUG_OMAP2PLUS_UART
421 config DEBUG_TI81XXUART1
422 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
423 depends on ARCH_OMAP2PLUS
424 select DEBUG_OMAP2PLUS_UART
426 config DEBUG_TI81XXUART2
427 bool "Kernel low-level debugging messages via TI81XX UART2"
428 depends on ARCH_OMAP2PLUS
429 select DEBUG_OMAP2PLUS_UART
431 config DEBUG_TI81XXUART3
432 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
433 depends on ARCH_OMAP2PLUS
434 select DEBUG_OMAP2PLUS_UART
436 config DEBUG_AM33XXUART1
437 bool "Kernel low-level debugging messages via AM33XX UART1"
438 depends on ARCH_OMAP2PLUS
439 select DEBUG_OMAP2PLUS_UART
441 config DEBUG_ZOOM_UART
442 bool "Kernel low-level debugging messages via Zoom2/3 UART"
443 depends on ARCH_OMAP2PLUS
444 select DEBUG_OMAP2PLUS_UART
446 config DEBUG_PICOXCELL_UART
447 depends on ARCH_PICOXCELL
448 bool "Use PicoXcell UART for low-level debug"
450 Say Y here if you want kernel low-level debugging support
451 on PicoXcell based platforms.
453 config DEBUG_PXA_UART1
455 bool "Use PXA UART1 for low-level debug"
457 Say Y here if you want kernel low-level debugging support
460 config DEBUG_REALVIEW_STD_PORT
461 bool "RealView Default UART"
462 depends on ARCH_REALVIEW
464 Say Y here if you want the debug print routines to direct
465 their output to the serial port on RealView EB, PB11MP, PBA8
468 config DEBUG_REALVIEW_PB1176_PORT
469 bool "RealView PB1176 UART"
470 depends on MACH_REALVIEW_PB1176
472 Say Y here if you want the debug print routines to direct
473 their output to the standard serial port on the RealView
476 config DEBUG_RK29_UART0
477 bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
478 depends on ARCH_ROCKCHIP
479 select DEBUG_ROCKCHIP_UART
481 Say Y here if you want kernel low-level debugging support
482 on Rockchip based platforms.
484 config DEBUG_RK29_UART1
485 bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
486 depends on ARCH_ROCKCHIP
487 select DEBUG_ROCKCHIP_UART
489 Say Y here if you want kernel low-level debugging support
490 on Rockchip based platforms.
492 config DEBUG_RK29_UART2
493 bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
494 depends on ARCH_ROCKCHIP
495 select DEBUG_ROCKCHIP_UART
497 Say Y here if you want kernel low-level debugging support
498 on Rockchip based platforms.
500 config DEBUG_RK3X_UART0
501 bool "Kernel low-level debugging messages via Rockchip RK3X UART0"
502 depends on ARCH_ROCKCHIP
503 select DEBUG_ROCKCHIP_UART
505 Say Y here if you want kernel low-level debugging support
506 on Rockchip based platforms.
508 config DEBUG_RK3X_UART1
509 bool "Kernel low-level debugging messages via Rockchip RK3X UART1"
510 depends on ARCH_ROCKCHIP
511 select DEBUG_ROCKCHIP_UART
513 Say Y here if you want kernel low-level debugging support
514 on Rockchip based platforms.
516 config DEBUG_RK3X_UART2
517 bool "Kernel low-level debugging messages via Rockchip RK3X UART2"
518 depends on ARCH_ROCKCHIP
519 select DEBUG_ROCKCHIP_UART
521 Say Y here if you want kernel low-level debugging support
522 on Rockchip based platforms.
524 config DEBUG_RK3X_UART3
525 bool "Kernel low-level debugging messages via Rockchip RK3X UART3"
526 depends on ARCH_ROCKCHIP
527 select DEBUG_ROCKCHIP_UART
529 Say Y here if you want kernel low-level debugging support
530 on Rockchip based platforms.
532 config DEBUG_S3C_UART0
533 depends on PLAT_SAMSUNG
534 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
535 bool "Use S3C UART 0 for low-level debug"
537 Say Y here if you want the debug print routines to direct
538 their output to UART 0. The port must have been initialised
539 by the boot-loader before use.
541 The uncompressor code port configuration is now handled
542 by CONFIG_S3C_LOWLEVEL_UART_PORT.
544 config DEBUG_S3C_UART1
545 depends on PLAT_SAMSUNG
546 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
547 bool "Use S3C UART 1 for low-level debug"
549 Say Y here if you want the debug print routines to direct
550 their output to UART 1. The port must have been initialised
551 by the boot-loader before use.
553 The uncompressor code port configuration is now handled
554 by CONFIG_S3C_LOWLEVEL_UART_PORT.
556 config DEBUG_S3C_UART2
557 depends on PLAT_SAMSUNG
558 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
559 bool "Use S3C UART 2 for low-level debug"
561 Say Y here if you want the debug print routines to direct
562 their output to UART 2. The port must have been initialised
563 by the boot-loader before use.
565 The uncompressor code port configuration is now handled
566 by CONFIG_S3C_LOWLEVEL_UART_PORT.
568 config DEBUG_S3C_UART3
569 depends on PLAT_SAMSUNG && ARCH_EXYNOS
570 select DEBUG_EXYNOS_UART
571 bool "Use S3C UART 3 for low-level debug"
573 Say Y here if you want the debug print routines to direct
574 their output to UART 3. The port must have been initialised
575 by the boot-loader before use.
577 The uncompressor code port configuration is now handled
578 by CONFIG_S3C_LOWLEVEL_UART_PORT.
580 config DEBUG_SOCFPGA_UART
581 depends on ARCH_SOCFPGA
582 bool "Use SOCFPGA UART for low-level debug"
584 Say Y here if you want kernel low-level debugging support
585 on SOCFPGA based platforms.
587 config DEBUG_SUNXI_UART0
588 bool "Kernel low-level debugging messages via sunXi UART0"
589 depends on ARCH_SUNXI
591 Say Y here if you want kernel low-level debugging support
592 on Allwinner A1X based platforms on the UART0.
594 config DEBUG_SUNXI_UART1
595 bool "Kernel low-level debugging messages via sunXi UART1"
596 depends on ARCH_SUNXI
598 Say Y here if you want kernel low-level debugging support
599 on Allwinner A1X based platforms on the UART1.
601 config TEGRA_DEBUG_UART_AUTO_ODMDATA
602 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
603 depends on ARCH_TEGRA
604 select DEBUG_TEGRA_UART
606 Automatically determines which UART to use for low-level
607 debug based on the ODMDATA value. This value is part of
608 the BCT, and is written to the boot memory device using
609 nvflash, or other flashing tool. When bits 19:18 are 3,
610 then bits 17:15 indicate which UART to use; 0/1/2/3/4
613 config TEGRA_DEBUG_UARTA
614 bool "Kernel low-level debugging messages via Tegra UART A"
615 depends on ARCH_TEGRA
616 select DEBUG_TEGRA_UART
618 Say Y here if you want kernel low-level debugging support
619 on Tegra based platforms.
621 config TEGRA_DEBUG_UARTB
622 bool "Kernel low-level debugging messages via Tegra UART B"
623 depends on ARCH_TEGRA
624 select DEBUG_TEGRA_UART
626 Say Y here if you want kernel low-level debugging support
627 on Tegra based platforms.
629 config TEGRA_DEBUG_UARTC
630 bool "Kernel low-level debugging messages via Tegra UART C"
631 depends on ARCH_TEGRA
632 select DEBUG_TEGRA_UART
634 Say Y here if you want kernel low-level debugging support
635 on Tegra based platforms.
637 config TEGRA_DEBUG_UARTD
638 bool "Kernel low-level debugging messages via Tegra UART D"
639 depends on ARCH_TEGRA
640 select DEBUG_TEGRA_UART
642 Say Y here if you want kernel low-level debugging support
643 on Tegra based platforms.
645 config TEGRA_DEBUG_UARTE
646 bool "Kernel low-level debugging messages via Tegra UART E"
647 depends on ARCH_TEGRA
648 select DEBUG_TEGRA_UART
650 Say Y here if you want kernel low-level debugging support
651 on Tegra based platforms.
653 config DEBUG_SIRFPRIMA2_UART1
654 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
655 depends on ARCH_PRIMA2
657 Say Y here if you want the debug print routines to direct
658 their output to the uart1 port on SiRFprimaII devices.
660 config DEBUG_SIRFMARCO_UART1
661 bool "Kernel low-level debugging messages via SiRFmarco UART1"
662 depends on ARCH_MARCO
664 Say Y here if you want the debug print routines to direct
665 their output to the uart1 port on SiRFmarco devices.
667 config STIH41X_DEBUG_ASC2
668 bool "Use StiH415/416 ASC2 UART for low-level debug"
670 select DEBUG_STI_UART
672 Say Y here if you want kernel low-level debugging support
673 on STiH415/416 based platforms like b2000, which has
674 default UART wired up to ASC2.
678 config STIH41X_DEBUG_SBC_ASC1
679 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
681 select DEBUG_STI_UART
683 Say Y here if you want kernel low-level debugging support
684 on STiH415/416 based platforms like b2020. which has
685 default UART wired up to SBC ASC1.
689 config DEBUG_U300_UART
690 bool "Kernel low-level debugging messages via U300 UART0"
693 Say Y here if you want the debug print routines to direct
694 their output to the uart port on U300 devices.
696 config DEBUG_UX500_UART
697 depends on ARCH_U8500
698 bool "Use Ux500 UART for low-level debug"
700 Say Y here if you want kernel low-level debugging support
701 on Ux500 based platforms.
703 config DEBUG_VEXPRESS_UART0_DETECT
704 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
705 depends on ARCH_VEXPRESS && CPU_CP15_MMU
707 This option enables a simple heuristic which tries to determine
708 the motherboard's memory map variant (original or RS1) and then
709 choose the relevant UART0 base address.
711 Note that this will only work with standard A-class core tiles,
712 and may fail with non-standard SMM or custom software models.
714 config DEBUG_VEXPRESS_UART0_CA9
715 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
716 depends on ARCH_VEXPRESS
718 This option selects UART0 at 0x10009000. Except for custom models,
719 this applies only to the V2P-CA9 tile.
721 config DEBUG_VEXPRESS_UART0_RS1
722 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
723 depends on ARCH_VEXPRESS
725 This option selects UART0 at 0x1c090000. This applies to most
726 of the tiles using the RS1 memory map, including all new A-class
727 core tiles, FPGA-based SMMs and software models.
729 config DEBUG_VEXPRESS_UART0_CRX
730 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
731 depends on ARCH_VEXPRESS && !MMU
733 This option selects UART0 at 0xb0090000. This is appropriate for
734 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
736 config DEBUG_VT8500_UART0
737 bool "Use UART0 on VIA/Wondermedia SoCs"
738 depends on ARCH_VT8500
740 This option selects UART0 on VIA/Wondermedia System-on-a-chip
741 devices, including VT8500, WM8505, WM8650 and WM8850.
743 config DEBUG_LL_UART_NONE
744 bool "No low-level debugging UART"
745 depends on !ARCH_MULTIPLATFORM
747 Say Y here if your platform doesn't provide a UART option
748 above. This relies on your platform choosing the right UART
749 definition internally in order for low-level debugging to
753 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
755 Say Y here if you want the debug print routines to direct
756 their output to the EmbeddedICE macrocell's DCC channel using
757 co-processor 14. This is known to work on the ARM9 style ICE
758 channel and on the XScale with the PEEDI.
760 Note that the system will appear to hang during boot if there
761 is nothing connected to read from the DCC.
763 config DEBUG_SEMIHOSTING
764 bool "Kernel low-level debug output via semihosting I/O"
766 Semihosting enables code running on an ARM target to use
767 the I/O facilities on a host debugger/emulator through a
768 simple SVC call. The host debugger or emulator must have
769 semihosting enabled for the special svc call to be trapped
770 otherwise the kernel will crash.
772 This is known to work with OpenOCD, as well as
773 ARM's Fast Models, or any other controlling environment
774 that implements semihosting.
776 For more details about semihosting, please see
777 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
781 config DEBUG_EXYNOS_UART
784 config DEBUG_OMAP2PLUS_UART
786 depends on ARCH_OMAP2PLUS
788 config DEBUG_IMX_UART_PORT
789 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
790 DEBUG_IMX25_UART || \
791 DEBUG_IMX21_IMX27_UART || \
792 DEBUG_IMX31_UART || \
793 DEBUG_IMX35_UART || \
794 DEBUG_IMX51_UART || \
795 DEBUG_IMX53_UART || \
796 DEBUG_IMX6Q_UART || \
801 Choose UART port on which kernel low-level debug messages
804 config DEBUG_ROCKCHIP_UART
806 depends on ARCH_ROCKCHIP
808 config DEBUG_TEGRA_UART
810 depends on ARCH_TEGRA
812 config DEBUG_STI_UART
816 config DEBUG_LL_INCLUDE
818 default "debug/bcm2835.S" if DEBUG_BCM2835
819 default "debug/cns3xxx.S" if DEBUG_CNS3XXX
820 default "debug/exynos.S" if DEBUG_EXYNOS_UART
821 default "debug/highbank.S" if DEBUG_HIGHBANK_UART
822 default "debug/icedcc.S" if DEBUG_ICEDCC
823 default "debug/imx.S" if DEBUG_IMX1_UART || \
824 DEBUG_IMX25_UART || \
825 DEBUG_IMX21_IMX27_UART || \
826 DEBUG_IMX31_UART || \
827 DEBUG_IMX35_UART || \
828 DEBUG_IMX51_UART || \
830 DEBUG_IMX6Q_UART || \
832 default "debug/keystone.S" if DEBUG_KEYSTONE_UART0 || \
834 default "debug/mvebu.S" if DEBUG_MVEBU_UART || \
835 DEBUG_MVEBU_UART_ALTERNATE
836 default "debug/mxs.S" if DEBUG_IMX23_UART || DEBUG_IMX28_UART
837 default "debug/nomadik.S" if DEBUG_NOMADIK_UART
838 default "debug/nspire.S" if DEBUG_NSPIRE_CX_UART || \
839 DEBUG_NSPIRE_CLASSIC_UART
840 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
841 default "debug/picoxcell.S" if DEBUG_PICOXCELL_UART
842 default "debug/pxa.S" if DEBUG_PXA_UART1 || DEBUG_MMP_UART2 || \
844 default "debug/rockchip.S" if DEBUG_ROCKCHIP_UART
845 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
846 default "debug/socfpga.S" if DEBUG_SOCFPGA_UART
847 default "debug/sti.S" if DEBUG_STI_UART
848 default "debug/sunxi.S" if DEBUG_SUNXI_UART0 || DEBUG_SUNXI_UART1
849 default "debug/tegra.S" if DEBUG_TEGRA_UART
850 default "debug/u300.S" if DEBUG_U300_UART
851 default "debug/ux500.S" if DEBUG_UX500_UART
852 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT || \
853 DEBUG_VEXPRESS_UART0_CA9 || DEBUG_VEXPRESS_UART0_RS1 || \
854 DEBUG_VEXPRESS_UART0_CRX
855 default "debug/vt8500.S" if DEBUG_VT8500_UART0
856 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
857 default "mach/debug-macro.S"
859 config DEBUG_UNCOMPRESS
861 depends on ARCH_MULTIPLATFORM
862 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
865 This option influences the normal decompressor output for
866 multiplatform kernels. Normally, multiplatform kernels disable
867 decompressor output because it is not possible to know where to
868 send the decompressor output.
870 When this option is set, the selected DEBUG_LL output method
871 will be re-used for normal decompressor output on multiplatform
875 config UNCOMPRESS_INCLUDE
877 default "debug/uncompress.h" if ARCH_MULTIPLATFORM
878 default "mach/uncompress.h"
884 Say Y here if you want to have an early console using the
885 kernel low-level debugging functions. Add earlyprintk to your
886 kernel parameters to enable this console.
889 bool "On-chip ETM and ETB"
892 Enables the on-chip embedded trace macrocell and embedded trace
893 buffer driver that will allow you to collect traces of the
896 config ARM_KPROBES_TEST
897 tristate "Kprobes test module"
898 depends on KPROBES && MODULES
900 Perform tests of kprobes API and instruction set simulation.
902 config PID_IN_CONTEXTIDR
903 bool "Write the current PID to the CONTEXTIDR register"
904 depends on CPU_COPY_V6
906 Enabling this option causes the kernel to write the current PID to
907 the PROCID field of the CONTEXTIDR register, at the expense of some
908 additional instructions during context switch. Say Y here only if you
909 are planning to use hardware trace tools with this kernel.