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
95 select DEBUG_UART_PL01X
97 config DEBUG_CLPS711X_UART1
98 bool "Kernel low-level debugging messages via UART1"
99 depends on ARCH_CLPS711X
101 Say Y here if you want the debug print routines to direct
102 their output to the first serial port on these devices.
104 config DEBUG_CLPS711X_UART2
105 bool "Kernel low-level debugging messages via UART2"
106 depends on ARCH_CLPS711X
108 Say Y here if you want the debug print routines to direct
109 their output to the second serial port on these devices.
112 bool "Kernel Kernel low-level debugging on Cavium Networks CNS3xxx"
113 depends on ARCH_CNS3XXX
114 select DEBUG_UART_PL01X
116 Say Y here if you want the debug print routines to direct
117 their output to the CNS3xxx UART0.
119 config DEBUG_DAVINCI_DA8XX_UART1
120 bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
121 depends on ARCH_DAVINCI_DA8XX
122 select DEBUG_UART_8250
124 Say Y here if you want the debug print routines to direct
125 their output to UART1 serial port on DaVinci DA8XX devices.
127 config DEBUG_DAVINCI_DA8XX_UART2
128 bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
129 depends on ARCH_DAVINCI_DA8XX
130 select DEBUG_UART_8250
132 Say Y here if you want the debug print routines to direct
133 their output to UART2 serial port on DaVinci DA8XX devices.
135 config DEBUG_DAVINCI_DMx_UART0
136 bool "Kernel low-level debugging on DaVinci DMx using UART0"
137 depends on ARCH_DAVINCI_DMx
138 select DEBUG_UART_8250
140 Say Y here if you want the debug print routines to direct
141 their output to UART0 serial port on DaVinci DMx devices.
143 config DEBUG_DAVINCI_TNETV107X_UART1
144 bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
145 depends on ARCH_DAVINCI_TNETV107X
146 select DEBUG_UART_8250
148 Say Y here if you want the debug print routines to direct
149 their output to UART1 serial port on DaVinci TNETV107X
152 config DEBUG_ZYNQ_UART0
153 bool "Kernel low-level debugging on Xilinx Zynq using UART0"
156 Say Y here if you want the debug print routines to direct
157 their output to UART0 on the Zynq platform.
159 config DEBUG_ZYNQ_UART1
160 bool "Kernel low-level debugging on Xilinx Zynq using UART1"
163 Say Y here if you want the debug print routines to direct
164 their output to UART1 on the Zynq platform.
166 If you have a ZC702 board and want early boot messages to
167 appear on the USB serial adaptor, select this option.
169 config DEBUG_DC21285_PORT
170 bool "Kernel low-level debugging messages via footbridge serial port"
171 depends on FOOTBRIDGE
173 Say Y here if you want the debug print routines to direct
174 their output to the serial port in the DC21285 (Footbridge).
176 config DEBUG_FOOTBRIDGE_COM1
177 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
178 depends on FOOTBRIDGE
180 Say Y here if you want the debug print routines to direct
181 their output to the 8250 at PCI COM1.
183 config DEBUG_HIGHBANK_UART
184 bool "Kernel low-level debugging messages via Highbank UART"
185 depends on ARCH_HIGHBANK
186 select DEBUG_UART_PL01X
188 Say Y here if you want the debug print routines to direct
189 their output to the UART on Highbank based devices.
191 config DEBUG_IMX1_UART
192 bool "i.MX1 Debug UART"
195 Say Y here if you want kernel low-level debugging support
198 config DEBUG_IMX23_UART
199 bool "i.MX23 Debug UART"
201 select DEBUG_UART_PL01X
203 Say Y here if you want kernel low-level debugging support
206 config DEBUG_IMX25_UART
207 bool "i.MX25 Debug UART"
210 Say Y here if you want kernel low-level debugging support
213 config DEBUG_IMX21_IMX27_UART
214 bool "i.MX21 and i.MX27 Debug UART"
215 depends on SOC_IMX21 || SOC_IMX27
217 Say Y here if you want kernel low-level debugging support
220 config DEBUG_IMX28_UART
221 bool "i.MX28 Debug UART"
223 select DEBUG_UART_PL01X
225 Say Y here if you want kernel low-level debugging support
228 config DEBUG_IMX31_UART
229 bool "i.MX31 Debug UART"
232 Say Y here if you want kernel low-level debugging support
235 config DEBUG_IMX35_UART
236 bool "i.MX35 Debug UART"
239 Say Y here if you want kernel low-level debugging support
242 config DEBUG_IMX51_UART
243 bool "i.MX51 Debug UART"
246 Say Y here if you want kernel low-level debugging support
249 config DEBUG_IMX53_UART
250 bool "i.MX53 Debug UART"
253 Say Y here if you want kernel low-level debugging support
256 config DEBUG_IMX6Q_UART
257 bool "i.MX6Q/DL Debug UART"
260 Say Y here if you want kernel low-level debugging support
263 config DEBUG_IMX6SL_UART
264 bool "i.MX6SL Debug UART"
265 depends on SOC_IMX6SL
267 Say Y here if you want kernel low-level debugging support
270 config DEBUG_KEYSTONE_UART0
271 bool "Kernel low-level debugging on KEYSTONE2 using UART0"
272 depends on ARCH_KEYSTONE
273 select DEBUG_UART_8250
275 Say Y here if you want the debug print routines to direct
276 their output to UART0 serial port on KEYSTONE2 devices.
278 config DEBUG_KEYSTONE_UART1
279 bool "Kernel low-level debugging on KEYSTONE2 using UART1"
280 depends on ARCH_KEYSTONE
281 select DEBUG_UART_8250
283 Say Y here if you want the debug print routines to direct
284 their output to UART1 serial port on KEYSTONE2 devices.
286 config DEBUG_MMP_UART2
287 bool "Kernel low-level debugging message via MMP UART2"
289 select DEBUG_UART_8250
291 Say Y here if you want kernel low-level debugging support
294 config DEBUG_MMP_UART3
295 bool "Kernel low-level debugging message via MMP UART3"
297 select DEBUG_UART_8250
299 Say Y here if you want kernel low-level debugging support
302 config DEBUG_MSM_UART1
303 bool "Kernel low-level debugging messages via MSM UART1"
304 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
306 Say Y here if you want the debug print routines to direct
307 their output to the first serial port on MSM devices.
309 config DEBUG_MSM_UART2
310 bool "Kernel low-level debugging messages via MSM UART2"
311 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
313 Say Y here if you want the debug print routines to direct
314 their output to the second serial port on MSM devices.
316 config DEBUG_MSM_UART3
317 bool "Kernel low-level debugging messages via MSM UART3"
318 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
320 Say Y here if you want the debug print routines to direct
321 their output to the third serial port on MSM devices.
323 config DEBUG_MSM8660_UART
324 bool "Kernel low-level debugging messages via MSM 8660 UART"
325 depends on ARCH_MSM8X60
326 select MSM_HAS_DEBUG_UART_HS
328 Say Y here if you want the debug print routines to direct
329 their output to the serial port on MSM 8660 devices.
331 config DEBUG_MSM8960_UART
332 bool "Kernel low-level debugging messages via MSM 8960 UART"
333 depends on ARCH_MSM8960
334 select MSM_HAS_DEBUG_UART_HS
336 Say Y here if you want the debug print routines to direct
337 their output to the serial port on MSM 8960 devices.
339 config DEBUG_MVEBU_UART
340 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
341 depends on ARCH_MVEBU
342 select DEBUG_UART_8250
344 Say Y here if you want kernel low-level debugging support
345 on MVEBU based platforms.
347 This option should be used with the old bootloaders
348 that left the internal registers mapped at
349 0xd0000000. As of today, this is the case on
350 platforms such as the Globalscale Mirabox or the
351 Plathome OpenBlocks AX3, when using the original
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_MVEBU_UART_ALTERNATE
359 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
360 depends on ARCH_MVEBU
361 select DEBUG_UART_8250
363 Say Y here if you want kernel low-level debugging support
364 on MVEBU based platforms.
366 This option should be used with the new bootloaders
367 that remap the internal registers at 0xf1000000.
369 If the wrong DEBUG_MVEBU_UART* option is selected,
370 when u-boot hands over to the kernel, the system
371 silently crashes, with no serial output at all.
373 config DEBUG_NOMADIK_UART
374 bool "Kernel low-level debugging messages via NOMADIK UART"
375 depends on ARCH_NOMADIK
376 select DEBUG_UART_PL01X
378 Say Y here if you want kernel low-level debugging support
379 on NOMADIK based platforms.
381 config DEBUG_NSPIRE_CLASSIC_UART
382 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
383 depends on ARCH_NSPIRE
384 select DEBUG_UART_8250
386 Say Y here if you want kernel low-level debugging support
387 on TI-NSPIRE classic models.
389 config DEBUG_NSPIRE_CX_UART
390 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
391 depends on ARCH_NSPIRE
392 select DEBUG_UART_PL01X
394 Say Y here if you want kernel low-level debugging support
395 on TI-NSPIRE CX models.
397 config DEBUG_OMAP2UART1
398 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
399 depends on ARCH_OMAP2PLUS
400 select DEBUG_OMAP2PLUS_UART
402 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
403 omap3 torpedo and 3530 lv som.
405 config DEBUG_OMAP2UART2
406 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
407 depends on ARCH_OMAP2PLUS
408 select DEBUG_OMAP2PLUS_UART
410 config DEBUG_OMAP2UART3
411 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
412 depends on ARCH_OMAP2PLUS
413 select DEBUG_OMAP2PLUS_UART
415 config DEBUG_OMAP3UART3
416 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
417 depends on ARCH_OMAP2PLUS
418 select DEBUG_OMAP2PLUS_UART
420 This covers at least cm_t3x, beagle, crane, devkit8000,
421 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
424 config DEBUG_OMAP4UART3
425 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
426 depends on ARCH_OMAP2PLUS
427 select DEBUG_OMAP2PLUS_UART
429 config DEBUG_OMAP3UART4
430 bool "Kernel low-level debugging messages via OMAP36XX UART4"
431 depends on ARCH_OMAP2PLUS
432 select DEBUG_OMAP2PLUS_UART
434 config DEBUG_OMAP4UART4
435 bool "Kernel low-level debugging messages via OMAP4/5 UART4"
436 depends on ARCH_OMAP2PLUS
437 select DEBUG_OMAP2PLUS_UART
439 config DEBUG_TI81XXUART1
440 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
441 depends on ARCH_OMAP2PLUS
442 select DEBUG_OMAP2PLUS_UART
444 config DEBUG_TI81XXUART2
445 bool "Kernel low-level debugging messages via TI81XX UART2"
446 depends on ARCH_OMAP2PLUS
447 select DEBUG_OMAP2PLUS_UART
449 config DEBUG_TI81XXUART3
450 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
451 depends on ARCH_OMAP2PLUS
452 select DEBUG_OMAP2PLUS_UART
454 config DEBUG_AM33XXUART1
455 bool "Kernel low-level debugging messages via AM33XX UART1"
456 depends on ARCH_OMAP2PLUS
457 select DEBUG_OMAP2PLUS_UART
459 config DEBUG_ZOOM_UART
460 bool "Kernel low-level debugging messages via Zoom2/3 UART"
461 depends on ARCH_OMAP2PLUS
462 select DEBUG_OMAP2PLUS_UART
464 config DEBUG_PICOXCELL_UART
465 depends on ARCH_PICOXCELL
466 bool "Use PicoXcell UART for low-level debug"
467 select DEBUG_UART_8250
469 Say Y here if you want kernel low-level debugging support
470 on PicoXcell based platforms.
472 config DEBUG_PXA_UART1
474 bool "Use PXA UART1 for low-level debug"
475 select DEBUG_UART_8250
477 Say Y here if you want kernel low-level debugging support
480 config DEBUG_REALVIEW_STD_PORT
481 bool "RealView Default UART"
482 depends on ARCH_REALVIEW
483 select DEBUG_UART_PL01X
485 Say Y here if you want the debug print routines to direct
486 their output to the serial port on RealView EB, PB11MP, PBA8
489 config DEBUG_REALVIEW_PB1176_PORT
490 bool "RealView PB1176 UART"
491 depends on MACH_REALVIEW_PB1176
492 select DEBUG_UART_PL01X
494 Say Y here if you want the debug print routines to direct
495 their output to the standard serial port on the RealView
498 config DEBUG_RK29_UART0
499 bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
500 depends on ARCH_ROCKCHIP
501 select DEBUG_UART_8250
503 Say Y here if you want kernel low-level debugging support
504 on Rockchip based platforms.
506 config DEBUG_RK29_UART1
507 bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
508 depends on ARCH_ROCKCHIP
509 select DEBUG_UART_8250
511 Say Y here if you want kernel low-level debugging support
512 on Rockchip based platforms.
514 config DEBUG_RK29_UART2
515 bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
516 depends on ARCH_ROCKCHIP
517 select DEBUG_UART_8250
519 Say Y here if you want kernel low-level debugging support
520 on Rockchip based platforms.
522 config DEBUG_RK3X_UART0
523 bool "Kernel low-level debugging messages via Rockchip RK3X UART0"
524 depends on ARCH_ROCKCHIP
525 select DEBUG_UART_8250
527 Say Y here if you want kernel low-level debugging support
528 on Rockchip based platforms.
530 config DEBUG_RK3X_UART1
531 bool "Kernel low-level debugging messages via Rockchip RK3X UART1"
532 depends on ARCH_ROCKCHIP
533 select DEBUG_UART_8250
535 Say Y here if you want kernel low-level debugging support
536 on Rockchip based platforms.
538 config DEBUG_RK3X_UART2
539 bool "Kernel low-level debugging messages via Rockchip RK3X UART2"
540 depends on ARCH_ROCKCHIP
541 select DEBUG_UART_8250
543 Say Y here if you want kernel low-level debugging support
544 on Rockchip based platforms.
546 config DEBUG_RK3X_UART3
547 bool "Kernel low-level debugging messages via Rockchip RK3X UART3"
548 depends on ARCH_ROCKCHIP
549 select DEBUG_UART_8250
551 Say Y here if you want kernel low-level debugging support
552 on Rockchip based platforms.
554 config DEBUG_S3C_UART0
555 depends on PLAT_SAMSUNG
556 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
557 bool "Use S3C UART 0 for low-level debug"
559 Say Y here if you want the debug print routines to direct
560 their output to UART 0. The port must have been initialised
561 by the boot-loader before use.
563 The uncompressor code port configuration is now handled
564 by CONFIG_S3C_LOWLEVEL_UART_PORT.
566 config DEBUG_S3C_UART1
567 depends on PLAT_SAMSUNG
568 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
569 bool "Use S3C UART 1 for low-level debug"
571 Say Y here if you want the debug print routines to direct
572 their output to UART 1. The port must have been initialised
573 by the boot-loader before use.
575 The uncompressor code port configuration is now handled
576 by CONFIG_S3C_LOWLEVEL_UART_PORT.
578 config DEBUG_S3C_UART2
579 depends on PLAT_SAMSUNG
580 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
581 bool "Use S3C UART 2 for low-level debug"
583 Say Y here if you want the debug print routines to direct
584 their output to UART 2. The port must have been initialised
585 by the boot-loader before use.
587 The uncompressor code port configuration is now handled
588 by CONFIG_S3C_LOWLEVEL_UART_PORT.
590 config DEBUG_S3C_UART3
591 depends on PLAT_SAMSUNG && ARCH_EXYNOS
592 select DEBUG_EXYNOS_UART
593 bool "Use S3C UART 3 for low-level debug"
595 Say Y here if you want the debug print routines to direct
596 their output to UART 3. The port must have been initialised
597 by the boot-loader before use.
599 The uncompressor code port configuration is now handled
600 by CONFIG_S3C_LOWLEVEL_UART_PORT.
602 config DEBUG_SOCFPGA_UART
603 depends on ARCH_SOCFPGA
604 bool "Use SOCFPGA UART for low-level debug"
605 select DEBUG_UART_8250
607 Say Y here if you want kernel low-level debugging support
608 on SOCFPGA based platforms.
610 config DEBUG_SUNXI_UART0
611 bool "Kernel low-level debugging messages via sunXi UART0"
612 depends on ARCH_SUNXI
613 select DEBUG_UART_8250
615 Say Y here if you want kernel low-level debugging support
616 on Allwinner A1X based platforms on the UART0.
618 config DEBUG_SUNXI_UART1
619 bool "Kernel low-level debugging messages via sunXi UART1"
620 depends on ARCH_SUNXI
621 select DEBUG_UART_8250
623 Say Y here if you want kernel low-level debugging support
624 on Allwinner A1X based platforms on the UART1.
626 config TEGRA_DEBUG_UART_AUTO_ODMDATA
627 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
628 depends on ARCH_TEGRA
629 select DEBUG_TEGRA_UART
631 Automatically determines which UART to use for low-level
632 debug based on the ODMDATA value. This value is part of
633 the BCT, and is written to the boot memory device using
634 nvflash, or other flashing tool. When bits 19:18 are 3,
635 then bits 17:15 indicate which UART to use; 0/1/2/3/4
638 config TEGRA_DEBUG_UARTA
639 bool "Kernel low-level debugging messages via Tegra UART A"
640 depends on ARCH_TEGRA
641 select DEBUG_TEGRA_UART
643 Say Y here if you want kernel low-level debugging support
644 on Tegra based platforms.
646 config TEGRA_DEBUG_UARTB
647 bool "Kernel low-level debugging messages via Tegra UART B"
648 depends on ARCH_TEGRA
649 select DEBUG_TEGRA_UART
651 Say Y here if you want kernel low-level debugging support
652 on Tegra based platforms.
654 config TEGRA_DEBUG_UARTC
655 bool "Kernel low-level debugging messages via Tegra UART C"
656 depends on ARCH_TEGRA
657 select DEBUG_TEGRA_UART
659 Say Y here if you want kernel low-level debugging support
660 on Tegra based platforms.
662 config TEGRA_DEBUG_UARTD
663 bool "Kernel low-level debugging messages via Tegra UART D"
664 depends on ARCH_TEGRA
665 select DEBUG_TEGRA_UART
667 Say Y here if you want kernel low-level debugging support
668 on Tegra based platforms.
670 config TEGRA_DEBUG_UARTE
671 bool "Kernel low-level debugging messages via Tegra UART E"
672 depends on ARCH_TEGRA
673 select DEBUG_TEGRA_UART
675 Say Y here if you want kernel low-level debugging support
676 on Tegra based platforms.
678 config DEBUG_SIRFPRIMA2_UART1
679 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
680 depends on ARCH_PRIMA2
682 Say Y here if you want the debug print routines to direct
683 their output to the uart1 port on SiRFprimaII devices.
685 config DEBUG_SIRFMARCO_UART1
686 bool "Kernel low-level debugging messages via SiRFmarco UART1"
687 depends on ARCH_MARCO
689 Say Y here if you want the debug print routines to direct
690 their output to the uart1 port on SiRFmarco devices.
692 config STIH41X_DEBUG_ASC2
693 bool "Use StiH415/416 ASC2 UART for low-level debug"
695 select DEBUG_STI_UART
697 Say Y here if you want kernel low-level debugging support
698 on STiH415/416 based platforms like b2000, which has
699 default UART wired up to ASC2.
703 config STIH41X_DEBUG_SBC_ASC1
704 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
706 select DEBUG_STI_UART
708 Say Y here if you want kernel low-level debugging support
709 on STiH415/416 based platforms like b2020. which has
710 default UART wired up to SBC ASC1.
714 config DEBUG_U300_UART
715 bool "Kernel low-level debugging messages via U300 UART0"
717 select DEBUG_UART_PL01X
719 Say Y here if you want the debug print routines to direct
720 their output to the uart port on U300 devices.
722 config DEBUG_UX500_UART
723 depends on ARCH_U8500
724 bool "Use Ux500 UART for low-level debug"
726 Say Y here if you want kernel low-level debugging support
727 on Ux500 based platforms.
729 config DEBUG_VEXPRESS_UART0_DETECT
730 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
731 depends on ARCH_VEXPRESS && CPU_CP15_MMU
733 This option enables a simple heuristic which tries to determine
734 the motherboard's memory map variant (original or RS1) and then
735 choose the relevant UART0 base address.
737 Note that this will only work with standard A-class core tiles,
738 and may fail with non-standard SMM or custom software models.
740 config DEBUG_VEXPRESS_UART0_CA9
741 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
742 depends on ARCH_VEXPRESS
743 select DEBUG_UART_PL01X
745 This option selects UART0 at 0x10009000. Except for custom models,
746 this applies only to the V2P-CA9 tile.
748 config DEBUG_VEXPRESS_UART0_RS1
749 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
750 depends on ARCH_VEXPRESS
751 select DEBUG_UART_PL01X
753 This option selects UART0 at 0x1c090000. This applies to most
754 of the tiles using the RS1 memory map, including all new A-class
755 core tiles, FPGA-based SMMs and software models.
757 config DEBUG_VEXPRESS_UART0_CRX
758 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
759 depends on ARCH_VEXPRESS && !MMU
760 select DEBUG_UART_PL01X
762 This option selects UART0 at 0xb0090000. This is appropriate for
763 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
765 config DEBUG_VT8500_UART0
766 bool "Use UART0 on VIA/Wondermedia SoCs"
767 depends on ARCH_VT8500
769 This option selects UART0 on VIA/Wondermedia System-on-a-chip
770 devices, including VT8500, WM8505, WM8650 and WM8850.
772 config DEBUG_LL_UART_NONE
773 bool "No low-level debugging UART"
774 depends on !ARCH_MULTIPLATFORM
776 Say Y here if your platform doesn't provide a UART option
777 above. This relies on your platform choosing the right UART
778 definition internally in order for low-level debugging to
782 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
784 Say Y here if you want the debug print routines to direct
785 their output to the EmbeddedICE macrocell's DCC channel using
786 co-processor 14. This is known to work on the ARM9 style ICE
787 channel and on the XScale with the PEEDI.
789 Note that the system will appear to hang during boot if there
790 is nothing connected to read from the DCC.
792 config DEBUG_SEMIHOSTING
793 bool "Kernel low-level debug output via semihosting I/O"
795 Semihosting enables code running on an ARM target to use
796 the I/O facilities on a host debugger/emulator through a
797 simple SVC call. The host debugger or emulator must have
798 semihosting enabled for the special svc call to be trapped
799 otherwise the kernel will crash.
801 This is known to work with OpenOCD, as well as
802 ARM's Fast Models, or any other controlling environment
803 that implements semihosting.
805 For more details about semihosting, please see
806 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
808 config DEBUG_LL_UART_8250
809 bool "Kernel low-level debugging via 8250 UART"
811 Say Y here if you wish the debug print routes to direct
812 their output to an 8250 UART. You can use this option
813 to provide the parameters for the 8250 UART rather than
814 selecting one of the platform specific options above if
815 you know the parameters for the port.
817 This option is preferred over the platform specific
818 options; the platform specific options are deprecated
819 and will be soon removed.
821 config DEBUG_LL_UART_PL01X
822 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
824 Say Y here if you wish the debug print routes to direct
825 their output to a PL01x Primecell UART. You can use
826 this option to provide the parameters for the UART
827 rather than selecting one of the platform specific
828 options above if you know the parameters for the port.
830 This option is preferred over the platform specific
831 options; the platform specific options are deprecated
832 and will be soon removed.
836 config DEBUG_EXYNOS_UART
839 config DEBUG_OMAP2PLUS_UART
841 depends on ARCH_OMAP2PLUS
843 config DEBUG_IMX_UART_PORT
844 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
845 DEBUG_IMX25_UART || \
846 DEBUG_IMX21_IMX27_UART || \
847 DEBUG_IMX31_UART || \
848 DEBUG_IMX35_UART || \
849 DEBUG_IMX51_UART || \
850 DEBUG_IMX53_UART || \
851 DEBUG_IMX6Q_UART || \
856 Choose UART port on which kernel low-level debug messages
859 config DEBUG_TEGRA_UART
861 depends on ARCH_TEGRA
863 config DEBUG_STI_UART
867 config DEBUG_LL_INCLUDE
869 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
870 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
871 default "debug/exynos.S" if DEBUG_EXYNOS_UART
872 default "debug/icedcc.S" if DEBUG_ICEDCC
873 default "debug/imx.S" if DEBUG_IMX1_UART || \
874 DEBUG_IMX25_UART || \
875 DEBUG_IMX21_IMX27_UART || \
876 DEBUG_IMX31_UART || \
877 DEBUG_IMX35_UART || \
878 DEBUG_IMX51_UART || \
880 DEBUG_IMX6Q_UART || \
882 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
883 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
884 default "debug/sti.S" if DEBUG_STI_UART
885 default "debug/tegra.S" if DEBUG_TEGRA_UART
886 default "debug/ux500.S" if DEBUG_UX500_UART
887 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
888 default "debug/vt8500.S" if DEBUG_VT8500_UART0
889 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
890 default "mach/debug-macro.S"
892 # Compatibility options for PL01x
893 config DEBUG_UART_PL01X
894 def_bool ARCH_EP93XX || \
901 # Compatibility options for 8250
902 config DEBUG_UART_8250
903 def_bool ARCH_DOVE || ARCH_EBSA110 || \
904 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
905 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
906 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \
907 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
909 config DEBUG_UART_PHYS
910 hex "Physical base address of debug UART"
911 default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0
912 default 0x01c28000 if DEBUG_SUNXI_UART0
913 default 0x01c28400 if DEBUG_SUNXI_UART1
914 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1
915 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2
916 default 0x02530c00 if DEBUG_KEYSTONE_UART0
917 default 0x02531000 if DEBUG_KEYSTONE_UART1
918 default 0x03010fe0 if ARCH_RPC
919 default 0x08108300 if DEBUG_DAVINCI_TNETV107X_UART1
920 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
921 DEBUG_VEXPRESS_UART0_CA9
922 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
923 default 0x10124000 if DEBUG_RK3X_UART0
924 default 0x10126000 if DEBUG_RK3X_UART1
925 default 0x101f1000 if ARCH_VERSATILE
926 default 0x101fb000 if DEBUG_NOMADIK_UART
927 default 0x16000000 if ARCH_INTEGRATOR
928 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
929 default 0x20060000 if DEBUG_RK29_UART0
930 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
931 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
932 default 0x20201000 if DEBUG_BCM2835
933 default 0x40090000 if ARCH_LPC32XX
934 default 0x40100000 if DEBUG_PXA_UART1
935 default 0x42000000 if ARCH_GEMINI
936 default 0x7c0003f8 if FOOTBRIDGE
937 default 0x80230000 if DEBUG_PICOXCELL_UART
938 default 0x80070000 if DEBUG_IMX23_UART
939 default 0x80074000 if DEBUG_IMX28_UART
940 default 0x808c0000 if ARCH_EP93XX
941 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
942 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
943 default 0xc0013000 if DEBUG_U300_UART
944 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
945 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
946 default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
947 default 0xd0012000 if DEBUG_MVEBU_UART
948 default 0xd4017000 if DEBUG_MMP_UART2
949 default 0xd4018000 if DEBUG_MMP_UART3
950 default 0xe0000000 if ARCH_SPEAR13XX
951 default 0xf0000be0 if ARCH_EBSA110
952 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
953 default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
955 default 0xfe800000 if ARCH_IOP32X
956 default 0xffc02000 if DEBUG_SOCFPGA_UART
957 default 0xffd82340 if ARCH_IOP13XX
958 default 0xfff36000 if DEBUG_HIGHBANK_UART
959 default 0xfffff700 if ARCH_IOP33X
960 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
961 DEBUG_UART_8250 || DEBUG_UART_PL01X
963 config DEBUG_UART_VIRT
964 hex "Virtual base address of debug UART"
965 default 0xe0010fe0 if ARCH_RPC
966 default 0xf0000be0 if ARCH_EBSA110
967 default 0xf0009000 if DEBUG_CNS3XXX
968 default 0xf01fb000 if DEBUG_NOMADIK_UART
969 default 0xf0201000 if DEBUG_BCM2835
970 default 0xf11f1000 if ARCH_VERSATILE
971 default 0xf1600000 if ARCH_INTEGRATOR
972 default 0xf1c28000 if DEBUG_SUNXI_UART0
973 default 0xf1c28400 if DEBUG_SUNXI_UART1
974 default 0xf2100000 if DEBUG_PXA_UART1
975 default 0xf4090000 if ARCH_LPC32XX
976 default 0xf4200000 if ARCH_GEMINI
977 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
978 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
979 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
980 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
981 default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
982 default 0xfd000000 if ARCH_SPEAR13XX
983 default 0xfd012000 if ARCH_MV78XX0
984 default 0xfde12000 if ARCH_DOVE
985 default 0xfe012000 if ARCH_ORION5X
986 default 0xfe017000 if DEBUG_MMP_UART2
987 default 0xfe018000 if DEBUG_MMP_UART3
988 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
989 default 0xfe230000 if DEBUG_PICOXCELL_UART
990 default 0xfe800000 if ARCH_IOP32X
991 default 0xfeb24000 if DEBUG_RK3X_UART0
992 default 0xfeb26000 if DEBUG_RK3X_UART1
993 default 0xfeb30c00 if DEBUG_KEYSTONE_UART0
994 default 0xfeb31000 if DEBUG_KEYSTONE_UART1
995 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
996 default 0xfed60000 if DEBUG_RK29_UART0
997 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
998 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
999 default 0xfec02000 if DEBUG_SOCFPGA_UART
1000 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0
1001 default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1
1002 default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2
1003 default 0xfed12000 if ARCH_KIRKWOOD
1004 default 0xfedc0000 if ARCH_EP93XX
1005 default 0xfee003f8 if FOOTBRIDGE
1006 default 0xfee08300 if DEBUG_DAVINCI_TNETV107X_UART1
1007 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1008 default 0xfef36000 if DEBUG_HIGHBANK_UART
1009 default 0xfee82340 if ARCH_IOP13XX
1010 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1011 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1012 default 0xfefff700 if ARCH_IOP33X
1013 default 0xff003000 if DEBUG_U300_UART
1014 default DEBUG_UART_PHYS if !MMU
1015 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1016 DEBUG_UART_8250 || DEBUG_UART_PL01X
1018 config DEBUG_UART_8250_SHIFT
1019 int "Register offset shift for the 8250 debug UART"
1020 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1021 default 0 if FOOTBRIDGE || ARCH_IOP32X
1024 config DEBUG_UART_8250_WORD
1025 bool "Use 32-bit accesses for 8250 UART"
1026 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1027 depends on DEBUG_UART_8250_SHIFT >= 2
1028 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
1030 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
1031 DEBUG_DAVINCI_DA8XX_UART2 || DEBUG_DAVINCI_TNETV107X_UART1
1033 config DEBUG_UART_8250_FLOW_CONTROL
1034 bool "Enable flow control for 8250 UART"
1035 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1036 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
1038 config DEBUG_UNCOMPRESS
1040 depends on ARCH_MULTIPLATFORM
1041 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
1042 (!DEBUG_TEGRA_UART || !ZBOOT_ROM)
1044 This option influences the normal decompressor output for
1045 multiplatform kernels. Normally, multiplatform kernels disable
1046 decompressor output because it is not possible to know where to
1047 send the decompressor output.
1049 When this option is set, the selected DEBUG_LL output method
1050 will be re-used for normal decompressor output on multiplatform
1054 config UNCOMPRESS_INCLUDE
1056 default "debug/uncompress.h" if ARCH_MULTIPLATFORM
1057 default "mach/uncompress.h"
1063 Say Y here if you want to have an early console using the
1064 kernel low-level debugging functions. Add earlyprintk to your
1065 kernel parameters to enable this console.
1068 bool "On-chip ETM and ETB"
1071 Enables the on-chip embedded trace macrocell and embedded trace
1072 buffer driver that will allow you to collect traces of the
1075 config ARM_KPROBES_TEST
1076 tristate "Kprobes test module"
1077 depends on KPROBES && MODULES
1079 Perform tests of kprobes API and instruction set simulation.
1081 config PID_IN_CONTEXTIDR
1082 bool "Write the current PID to the CONTEXTIDR register"
1083 depends on CPU_COPY_V6
1085 Enabling this option causes the kernel to write the current PID to
1086 the PROCID field of the CONTEXTIDR register, at the expense of some
1087 additional instructions during context switch. Say Y here only if you
1088 are planning to use hardware trace tools with this kernel.