3 source "lib/Kconfig.debug"
6 bool "Export kernel pagetable layout to userspace via debugfs"
7 depends on DEBUG_KERNEL
10 Say Y here if you want to show the kernel pagetable layout in a
11 debugfs file. This information is only useful for kernel developers
12 who are working in architecture specific areas of the kernel.
13 It is probably not a good idea to enable this feature in a production
18 bool "Filter access to /dev/mem"
21 If this option is disabled, you allow userspace (root) access to all
22 of memory, including kernel and userspace memory. Accidental
23 access to this is obviously disastrous, but specific access can
24 be used by people debugging the kernel.
26 If this option is switched on, the /dev/mem file only allows
27 userspace access to memory mapped peripherals.
31 # RMK wants arm kernels compiled with frame pointers or stack unwinding.
32 # If you know what you are doing and are willing to live without stack
33 # traces, you can get a slightly smaller kernel by setting this option to
34 # n, but then RMK will have to kill you ;).
37 depends on !THUMB2_KERNEL
38 default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
40 If you say N here, the resulting kernel will be slightly smaller and
41 faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
42 when a problem occurs with the kernel, the information that is
43 reported is severely limited.
46 bool "Enable stack unwinding support (EXPERIMENTAL)"
50 This option enables stack unwinding support in the kernel
51 using the information automatically generated by the
52 compiler. The resulting kernel image is slightly bigger but
53 the performance is not affected. Currently, this feature
54 only works with EABI compilers. If unsure say Y.
58 depends on FUNCTION_TRACER && FRAME_POINTER
62 bool "Verbose user fault messages"
64 When a user program crashes due to an exception, the kernel can
65 print a brief message explaining what the problem was. This is
66 sometimes helpful for debugging but serves no purpose on a
67 production system. Most people should say N here.
69 In addition, you need to pass user_debug=N on the kernel command
70 line to enable this feature. N consists of the sum of:
72 1 - undefined instruction events
74 4 - invalid data aborts
78 # These options are only for real kernel hackers who want to get their hands dirty.
80 bool "Kernel low-level debugging functions (read help!)"
81 depends on DEBUG_KERNEL
83 Say Y here to include definitions of printascii, printch, printhex
84 in the kernel. This is helpful if you are debugging code that
85 executes before the console is initialized.
87 Note that selecting this option will limit the kernel to a single
88 UART definition, as specified below. Attempting to boot the kernel
89 image on a different platform *will not work*, so this option should
90 not be enabled for kernels that are intended to be portable.
93 prompt "Kernel low-level debugging port"
96 config AT91_DEBUG_LL_DBGU0
97 bool "Kernel low-level debugging on rm9200, 9260/9g20, 9261/9g10 and 9rl"
98 depends on HAVE_AT91_DBGU0
100 config AT91_DEBUG_LL_DBGU1
101 bool "Kernel low-level debugging on 9263 and 9g45"
102 depends on HAVE_AT91_DBGU1
105 bool "Kernel low-level debugging on BCM2835 PL011 UART"
106 depends on ARCH_BCM2835
107 select DEBUG_UART_PL01X
109 config DEBUG_BCM_5301X
110 bool "Kernel low-level debugging on BCM5301X UART1"
111 depends on ARCH_BCM_5301X
112 select DEBUG_UART_PL01X
114 config DEBUG_BCM_KONA_UART
115 bool "Kernel low-level debugging messages via BCM KONA UART"
117 select DEBUG_UART_8250
119 Say Y here if you want kernel low-level debugging support
120 on Broadcom SoC platforms.
121 This low level debug works for Broadcom
122 mobile SoCs in the Kona family of chips (e.g. bcm28155,
125 config DEBUG_BERLIN_UART
126 bool "Marvell Berlin SoC Debug UART"
127 depends on ARCH_BERLIN
128 select DEBUG_UART_8250
130 Say Y here if you want kernel low-level debugging support
131 on Marvell Berlin SoC based platforms.
133 config DEBUG_CLPS711X_UART1
134 bool "Kernel low-level debugging messages via UART1"
135 depends on ARCH_CLPS711X
137 Say Y here if you want the debug print routines to direct
138 their output to the first serial port on these devices.
140 config DEBUG_CLPS711X_UART2
141 bool "Kernel low-level debugging messages via UART2"
142 depends on ARCH_CLPS711X
144 Say Y here if you want the debug print routines to direct
145 their output to the second serial port on these devices.
148 bool "Kernel Kernel low-level debugging on Cavium Networks CNS3xxx"
149 depends on ARCH_CNS3XXX
150 select DEBUG_UART_PL01X
152 Say Y here if you want the debug print routines to direct
153 their output to the CNS3xxx UART0.
155 config DEBUG_DAVINCI_DA8XX_UART1
156 bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
157 depends on ARCH_DAVINCI_DA8XX
158 select DEBUG_UART_8250
160 Say Y here if you want the debug print routines to direct
161 their output to UART1 serial port on DaVinci DA8XX devices.
163 config DEBUG_DAVINCI_DA8XX_UART2
164 bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
165 depends on ARCH_DAVINCI_DA8XX
166 select DEBUG_UART_8250
168 Say Y here if you want the debug print routines to direct
169 their output to UART2 serial port on DaVinci DA8XX devices.
171 config DEBUG_DAVINCI_DMx_UART0
172 bool "Kernel low-level debugging on DaVinci DMx using UART0"
173 depends on ARCH_DAVINCI_DMx
174 select DEBUG_UART_8250
176 Say Y here if you want the debug print routines to direct
177 their output to UART0 serial port on DaVinci DMx devices.
179 config DEBUG_DAVINCI_TNETV107X_UART1
180 bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
181 depends on ARCH_DAVINCI_TNETV107X
182 select DEBUG_UART_8250
184 Say Y here if you want the debug print routines to direct
185 their output to UART1 serial port on DaVinci TNETV107X
188 config DEBUG_ZYNQ_UART0
189 bool "Kernel low-level debugging on Xilinx Zynq using UART0"
192 Say Y here if you want the debug print routines to direct
193 their output to UART0 on the Zynq platform.
195 config DEBUG_ZYNQ_UART1
196 bool "Kernel low-level debugging on Xilinx Zynq using UART1"
199 Say Y here if you want the debug print routines to direct
200 their output to UART1 on the Zynq platform.
202 If you have a ZC702 board and want early boot messages to
203 appear on the USB serial adaptor, select this option.
205 config DEBUG_DC21285_PORT
206 bool "Kernel low-level debugging messages via footbridge serial port"
207 depends on FOOTBRIDGE
209 Say Y here if you want the debug print routines to direct
210 their output to the serial port in the DC21285 (Footbridge).
212 config DEBUG_FOOTBRIDGE_COM1
213 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
214 depends on FOOTBRIDGE
216 Say Y here if you want the debug print routines to direct
217 their output to the 8250 at PCI COM1.
219 config DEBUG_HI3620_UART
220 bool "Hisilicon HI3620 Debug UART"
221 depends on ARCH_HI3xxx
222 select DEBUG_UART_PL01X
224 Say Y here if you want kernel low-level debugging support
227 config DEBUG_HI3716_UART
228 bool "Hisilicon Hi3716 Debug UART"
229 depends on ARCH_HI3xxx
230 select DEBUG_UART_PL01X
232 Say Y here if you want kernel low-level debugging support
235 config DEBUG_HIGHBANK_UART
236 bool "Kernel low-level debugging messages via Highbank UART"
237 depends on ARCH_HIGHBANK
238 select DEBUG_UART_PL01X
240 Say Y here if you want the debug print routines to direct
241 their output to the UART on Highbank based devices.
243 config DEBUG_IMX1_UART
244 bool "i.MX1 Debug UART"
247 Say Y here if you want kernel low-level debugging support
250 config DEBUG_IMX23_UART
251 bool "i.MX23 Debug UART"
253 select DEBUG_UART_PL01X
255 Say Y here if you want kernel low-level debugging support
258 config DEBUG_IMX25_UART
259 bool "i.MX25 Debug UART"
262 Say Y here if you want kernel low-level debugging support
265 config DEBUG_IMX21_IMX27_UART
266 bool "i.MX21 and i.MX27 Debug UART"
267 depends on SOC_IMX21 || SOC_IMX27
269 Say Y here if you want kernel low-level debugging support
272 config DEBUG_IMX28_UART
273 bool "i.MX28 Debug UART"
275 select DEBUG_UART_PL01X
277 Say Y here if you want kernel low-level debugging support
280 config DEBUG_IMX31_UART
281 bool "i.MX31 Debug UART"
284 Say Y here if you want kernel low-level debugging support
287 config DEBUG_IMX35_UART
288 bool "i.MX35 Debug UART"
291 Say Y here if you want kernel low-level debugging support
294 config DEBUG_IMX50_UART
295 bool "i.MX50 Debug UART"
298 Say Y here if you want kernel low-level debugging support
301 config DEBUG_IMX51_UART
302 bool "i.MX51 Debug UART"
305 Say Y here if you want kernel low-level debugging support
308 config DEBUG_IMX53_UART
309 bool "i.MX53 Debug UART"
312 Say Y here if you want kernel low-level debugging support
315 config DEBUG_IMX6Q_UART
316 bool "i.MX6Q/DL Debug UART"
319 Say Y here if you want kernel low-level debugging support
322 config DEBUG_IMX6SL_UART
323 bool "i.MX6SL Debug UART"
324 depends on SOC_IMX6SL
326 Say Y here if you want kernel low-level debugging support
329 config DEBUG_KEYSTONE_UART0
330 bool "Kernel low-level debugging on KEYSTONE2 using UART0"
331 depends on ARCH_KEYSTONE
332 select DEBUG_UART_8250
334 Say Y here if you want the debug print routines to direct
335 their output to UART0 serial port on KEYSTONE2 devices.
337 config DEBUG_KEYSTONE_UART1
338 bool "Kernel low-level debugging on KEYSTONE2 using UART1"
339 depends on ARCH_KEYSTONE
340 select DEBUG_UART_8250
342 Say Y here if you want the debug print routines to direct
343 their output to UART1 serial port on KEYSTONE2 devices.
345 config DEBUG_MMP_UART2
346 bool "Kernel low-level debugging message via MMP UART2"
348 select DEBUG_UART_8250
350 Say Y here if you want kernel low-level debugging support
353 config DEBUG_MMP_UART3
354 bool "Kernel low-level debugging message via MMP UART3"
356 select DEBUG_UART_8250
358 Say Y here if you want kernel low-level debugging support
361 config DEBUG_MSM_UART1
362 bool "Kernel low-level debugging messages via MSM UART1"
363 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
364 select DEBUG_MSM_UART
366 Say Y here if you want the debug print routines to direct
367 their output to the first serial port on MSM devices.
369 config DEBUG_MSM_UART2
370 bool "Kernel low-level debugging messages via MSM UART2"
371 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
372 select DEBUG_MSM_UART
374 Say Y here if you want the debug print routines to direct
375 their output to the second serial port on MSM devices.
377 config DEBUG_MSM_UART3
378 bool "Kernel low-level debugging messages via MSM UART3"
379 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
380 select DEBUG_MSM_UART
382 Say Y here if you want the debug print routines to direct
383 their output to the third serial port on MSM devices.
385 config DEBUG_MSM8660_UART
386 bool "Kernel low-level debugging messages via MSM 8660 UART"
387 depends on ARCH_MSM8X60
388 select MSM_HAS_DEBUG_UART_HS
389 select DEBUG_MSM_UART
391 Say Y here if you want the debug print routines to direct
392 their output to the serial port on MSM 8660 devices.
394 config DEBUG_MSM8960_UART
395 bool "Kernel low-level debugging messages via MSM 8960 UART"
396 depends on ARCH_MSM8960
397 select MSM_HAS_DEBUG_UART_HS
398 select DEBUG_MSM_UART
400 Say Y here if you want the debug print routines to direct
401 their output to the serial port on MSM 8960 devices.
403 config DEBUG_MSM8974_UART
404 bool "Kernel low-level debugging messages via MSM 8974 UART"
405 depends on ARCH_MSM8974
406 select MSM_HAS_DEBUG_UART_HS
407 select DEBUG_MSM_UART
409 Say Y here if you want the debug print routines to direct
410 their output to the serial port on MSM 8974 devices.
412 config DEBUG_MVEBU_UART
413 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
414 depends on ARCH_MVEBU
415 select DEBUG_UART_8250
417 Say Y here if you want kernel low-level debugging support
418 on MVEBU based platforms.
420 This option should be used with the old bootloaders
421 that left the internal registers mapped at
422 0xd0000000. As of today, this is the case on
423 platforms such as the Globalscale Mirabox or the
424 Plathome OpenBlocks AX3, when using the original
427 If the wrong DEBUG_MVEBU_UART* option is selected,
428 when u-boot hands over to the kernel, the system
429 silently crashes, with no serial output at all.
431 config DEBUG_MVEBU_UART_ALTERNATE
432 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
433 depends on ARCH_MVEBU
434 select DEBUG_UART_8250
436 Say Y here if you want kernel low-level debugging support
437 on MVEBU based platforms.
439 This option should be used with the new bootloaders
440 that remap the internal registers at 0xf1000000.
442 If the wrong DEBUG_MVEBU_UART* option is selected,
443 when u-boot hands over to the kernel, the system
444 silently crashes, with no serial output at all.
450 Say Y here if you want kernel low-level debugging support
451 on Vybrid based platforms.
453 config DEBUG_NOMADIK_UART
454 bool "Kernel low-level debugging messages via NOMADIK UART"
455 depends on ARCH_NOMADIK
456 select DEBUG_UART_PL01X
458 Say Y here if you want kernel low-level debugging support
459 on NOMADIK based platforms.
461 config DEBUG_NSPIRE_CLASSIC_UART
462 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
463 depends on ARCH_NSPIRE
464 select DEBUG_UART_8250
466 Say Y here if you want kernel low-level debugging support
467 on TI-NSPIRE classic models.
469 config DEBUG_NSPIRE_CX_UART
470 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
471 depends on ARCH_NSPIRE
472 select DEBUG_UART_PL01X
474 Say Y here if you want kernel low-level debugging support
475 on TI-NSPIRE CX models.
477 config DEBUG_OMAP2UART1
478 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
479 depends on ARCH_OMAP2PLUS
480 select DEBUG_OMAP2PLUS_UART
482 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
483 omap3 torpedo and 3530 lv som.
485 config DEBUG_OMAP2UART2
486 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
487 depends on ARCH_OMAP2PLUS
488 select DEBUG_OMAP2PLUS_UART
490 config DEBUG_OMAP2UART3
491 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
492 depends on ARCH_OMAP2PLUS
493 select DEBUG_OMAP2PLUS_UART
495 config DEBUG_OMAP3UART3
496 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
497 depends on ARCH_OMAP2PLUS
498 select DEBUG_OMAP2PLUS_UART
500 This covers at least cm_t3x, beagle, crane, devkit8000,
501 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
504 config DEBUG_OMAP4UART3
505 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
506 depends on ARCH_OMAP2PLUS
507 select DEBUG_OMAP2PLUS_UART
509 config DEBUG_OMAP3UART4
510 bool "Kernel low-level debugging messages via OMAP36XX UART4"
511 depends on ARCH_OMAP2PLUS
512 select DEBUG_OMAP2PLUS_UART
514 config DEBUG_OMAP4UART4
515 bool "Kernel low-level debugging messages via OMAP4/5 UART4"
516 depends on ARCH_OMAP2PLUS
517 select DEBUG_OMAP2PLUS_UART
519 config DEBUG_TI81XXUART1
520 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
521 depends on ARCH_OMAP2PLUS
522 select DEBUG_OMAP2PLUS_UART
524 config DEBUG_TI81XXUART2
525 bool "Kernel low-level debugging messages via TI81XX UART2"
526 depends on ARCH_OMAP2PLUS
527 select DEBUG_OMAP2PLUS_UART
529 config DEBUG_TI81XXUART3
530 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
531 depends on ARCH_OMAP2PLUS
532 select DEBUG_OMAP2PLUS_UART
534 config DEBUG_AM33XXUART1
535 bool "Kernel low-level debugging messages via AM33XX UART1"
536 depends on ARCH_OMAP2PLUS
537 select DEBUG_OMAP2PLUS_UART
539 config DEBUG_ZOOM_UART
540 bool "Kernel low-level debugging messages via Zoom2/3 UART"
541 depends on ARCH_OMAP2PLUS
542 select DEBUG_OMAP2PLUS_UART
544 config DEBUG_PICOXCELL_UART
545 depends on ARCH_PICOXCELL
546 bool "Use PicoXcell UART for low-level debug"
547 select DEBUG_UART_8250
549 Say Y here if you want kernel low-level debugging support
550 on PicoXcell based platforms.
552 config DEBUG_PXA_UART1
554 bool "Use PXA UART1 for low-level debug"
555 select DEBUG_UART_8250
557 Say Y here if you want kernel low-level debugging support
560 config DEBUG_REALVIEW_STD_PORT
561 bool "RealView Default UART"
562 depends on ARCH_REALVIEW
563 select DEBUG_UART_PL01X
565 Say Y here if you want the debug print routines to direct
566 their output to the serial port on RealView EB, PB11MP, PBA8
569 config DEBUG_REALVIEW_PB1176_PORT
570 bool "RealView PB1176 UART"
571 depends on MACH_REALVIEW_PB1176
572 select DEBUG_UART_PL01X
574 Say Y here if you want the debug print routines to direct
575 their output to the standard serial port on the RealView
578 config DEBUG_RK29_UART0
579 bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
580 depends on ARCH_ROCKCHIP
581 select DEBUG_UART_8250
583 Say Y here if you want kernel low-level debugging support
584 on Rockchip based platforms.
586 config DEBUG_RK29_UART1
587 bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
588 depends on ARCH_ROCKCHIP
589 select DEBUG_UART_8250
591 Say Y here if you want kernel low-level debugging support
592 on Rockchip based platforms.
594 config DEBUG_RK29_UART2
595 bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
596 depends on ARCH_ROCKCHIP
597 select DEBUG_UART_8250
599 Say Y here if you want kernel low-level debugging support
600 on Rockchip based platforms.
602 config DEBUG_RK3X_UART0
603 bool "Kernel low-level debugging messages via Rockchip RK3X UART0"
604 depends on ARCH_ROCKCHIP
605 select DEBUG_UART_8250
607 Say Y here if you want kernel low-level debugging support
608 on Rockchip based platforms.
610 config DEBUG_RK3X_UART1
611 bool "Kernel low-level debugging messages via Rockchip RK3X UART1"
612 depends on ARCH_ROCKCHIP
613 select DEBUG_UART_8250
615 Say Y here if you want kernel low-level debugging support
616 on Rockchip based platforms.
618 config DEBUG_RK3X_UART2
619 bool "Kernel low-level debugging messages via Rockchip RK3X UART2"
620 depends on ARCH_ROCKCHIP
621 select DEBUG_UART_8250
623 Say Y here if you want kernel low-level debugging support
624 on Rockchip based platforms.
626 config DEBUG_RK3X_UART3
627 bool "Kernel low-level debugging messages via Rockchip RK3X UART3"
628 depends on ARCH_ROCKCHIP
629 select DEBUG_UART_8250
631 Say Y here if you want kernel low-level debugging support
632 on Rockchip based platforms.
634 config DEBUG_S3C_UART0
635 depends on PLAT_SAMSUNG
636 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
637 bool "Use S3C UART 0 for low-level debug"
639 Say Y here if you want the debug print routines to direct
640 their output to UART 0. The port must have been initialised
641 by the boot-loader before use.
643 The uncompressor code port configuration is now handled
644 by CONFIG_S3C_LOWLEVEL_UART_PORT.
646 config DEBUG_S3C_UART1
647 depends on PLAT_SAMSUNG
648 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
649 bool "Use S3C UART 1 for low-level debug"
651 Say Y here if you want the debug print routines to direct
652 their output to UART 1. The port must have been initialised
653 by the boot-loader before use.
655 The uncompressor code port configuration is now handled
656 by CONFIG_S3C_LOWLEVEL_UART_PORT.
658 config DEBUG_S3C_UART2
659 depends on PLAT_SAMSUNG
660 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
661 bool "Use S3C UART 2 for low-level debug"
663 Say Y here if you want the debug print routines to direct
664 their output to UART 2. The port must have been initialised
665 by the boot-loader before use.
667 The uncompressor code port configuration is now handled
668 by CONFIG_S3C_LOWLEVEL_UART_PORT.
670 config DEBUG_S3C_UART3
671 depends on PLAT_SAMSUNG && ARCH_EXYNOS
672 select DEBUG_EXYNOS_UART
673 bool "Use S3C UART 3 for low-level debug"
675 Say Y here if you want the debug print routines to direct
676 their output to UART 3. The port must have been initialised
677 by the boot-loader before use.
679 The uncompressor code port configuration is now handled
680 by CONFIG_S3C_LOWLEVEL_UART_PORT.
682 config DEBUG_SOCFPGA_UART
683 depends on ARCH_SOCFPGA
684 bool "Use SOCFPGA UART for low-level debug"
685 select DEBUG_UART_8250
687 Say Y here if you want kernel low-level debugging support
688 on SOCFPGA based platforms.
690 config DEBUG_SUNXI_UART0
691 bool "Kernel low-level debugging messages via sunXi UART0"
692 depends on ARCH_SUNXI
693 select DEBUG_UART_8250
695 Say Y here if you want kernel low-level debugging support
696 on Allwinner A1X based platforms on the UART0.
698 config DEBUG_SUNXI_UART1
699 bool "Kernel low-level debugging messages via sunXi UART1"
700 depends on ARCH_SUNXI
701 select DEBUG_UART_8250
703 Say Y here if you want kernel low-level debugging support
704 on Allwinner A1X based platforms on the UART1.
706 config TEGRA_DEBUG_UART_AUTO_ODMDATA
707 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
708 depends on ARCH_TEGRA
709 select DEBUG_TEGRA_UART
711 Automatically determines which UART to use for low-level
712 debug based on the ODMDATA value. This value is part of
713 the BCT, and is written to the boot memory device using
714 nvflash, or other flashing tool. When bits 19:18 are 3,
715 then bits 17:15 indicate which UART to use; 0/1/2/3/4
718 config TEGRA_DEBUG_UARTA
719 bool "Kernel low-level debugging messages via Tegra UART A"
720 depends on ARCH_TEGRA
721 select DEBUG_TEGRA_UART
723 Say Y here if you want kernel low-level debugging support
724 on Tegra based platforms.
726 config TEGRA_DEBUG_UARTB
727 bool "Kernel low-level debugging messages via Tegra UART B"
728 depends on ARCH_TEGRA
729 select DEBUG_TEGRA_UART
731 Say Y here if you want kernel low-level debugging support
732 on Tegra based platforms.
734 config TEGRA_DEBUG_UARTC
735 bool "Kernel low-level debugging messages via Tegra UART C"
736 depends on ARCH_TEGRA
737 select DEBUG_TEGRA_UART
739 Say Y here if you want kernel low-level debugging support
740 on Tegra based platforms.
742 config TEGRA_DEBUG_UARTD
743 bool "Kernel low-level debugging messages via Tegra UART D"
744 depends on ARCH_TEGRA
745 select DEBUG_TEGRA_UART
747 Say Y here if you want kernel low-level debugging support
748 on Tegra based platforms.
750 config TEGRA_DEBUG_UARTE
751 bool "Kernel low-level debugging messages via Tegra UART E"
752 depends on ARCH_TEGRA
753 select DEBUG_TEGRA_UART
755 Say Y here if you want kernel low-level debugging support
756 on Tegra based platforms.
758 config DEBUG_SIRFPRIMA2_UART1
759 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
760 depends on ARCH_PRIMA2
762 Say Y here if you want the debug print routines to direct
763 their output to the uart1 port on SiRFprimaII devices.
765 config DEBUG_SIRFMARCO_UART1
766 bool "Kernel low-level debugging messages via SiRFmarco UART1"
767 depends on ARCH_MARCO
769 Say Y here if you want the debug print routines to direct
770 their output to the uart1 port on SiRFmarco devices.
772 config STIH41X_DEBUG_ASC2
773 bool "Use StiH415/416 ASC2 UART for low-level debug"
775 select DEBUG_STI_UART
777 Say Y here if you want kernel low-level debugging support
778 on STiH415/416 based platforms like b2000, which has
779 default UART wired up to ASC2.
783 config STIH41X_DEBUG_SBC_ASC1
784 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
786 select DEBUG_STI_UART
788 Say Y here if you want kernel low-level debugging support
789 on STiH415/416 based platforms like b2020. which has
790 default UART wired up to SBC ASC1.
794 config DEBUG_U300_UART
795 bool "Kernel low-level debugging messages via U300 UART0"
797 select DEBUG_UART_PL01X
799 Say Y here if you want the debug print routines to direct
800 their output to the uart port on U300 devices.
802 config DEBUG_UX500_UART
803 depends on ARCH_U8500
804 bool "Use Ux500 UART for low-level debug"
806 Say Y here if you want kernel low-level debugging support
807 on Ux500 based platforms.
809 config DEBUG_VEXPRESS_UART0_DETECT
810 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
811 depends on ARCH_VEXPRESS && CPU_CP15_MMU
813 This option enables a simple heuristic which tries to determine
814 the motherboard's memory map variant (original or RS1) and then
815 choose the relevant UART0 base address.
817 Note that this will only work with standard A-class core tiles,
818 and may fail with non-standard SMM or custom software models.
820 config DEBUG_VEXPRESS_UART0_CA9
821 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
822 depends on ARCH_VEXPRESS
823 select DEBUG_UART_PL01X
825 This option selects UART0 at 0x10009000. Except for custom models,
826 this applies only to the V2P-CA9 tile.
828 config DEBUG_VEXPRESS_UART0_RS1
829 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
830 depends on ARCH_VEXPRESS
831 select DEBUG_UART_PL01X
833 This option selects UART0 at 0x1c090000. This applies to most
834 of the tiles using the RS1 memory map, including all new A-class
835 core tiles, FPGA-based SMMs and software models.
837 config DEBUG_VEXPRESS_UART0_CRX
838 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
839 depends on ARCH_VEXPRESS && !MMU
840 select DEBUG_UART_PL01X
842 This option selects UART0 at 0xb0090000. This is appropriate for
843 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
845 config DEBUG_VT8500_UART0
846 bool "Use UART0 on VIA/Wondermedia SoCs"
847 depends on ARCH_VT8500
849 This option selects UART0 on VIA/Wondermedia System-on-a-chip
850 devices, including VT8500, WM8505, WM8650 and WM8850.
852 config DEBUG_LL_UART_NONE
853 bool "No low-level debugging UART"
854 depends on !ARCH_MULTIPLATFORM
856 Say Y here if your platform doesn't provide a UART option
857 above. This relies on your platform choosing the right UART
858 definition internally in order for low-level debugging to
862 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
864 Say Y here if you want the debug print routines to direct
865 their output to the EmbeddedICE macrocell's DCC channel using
866 co-processor 14. This is known to work on the ARM9 style ICE
867 channel and on the XScale with the PEEDI.
869 Note that the system will appear to hang during boot if there
870 is nothing connected to read from the DCC.
872 config DEBUG_SEMIHOSTING
873 bool "Kernel low-level debug output via semihosting I/O"
875 Semihosting enables code running on an ARM target to use
876 the I/O facilities on a host debugger/emulator through a
877 simple SVC call. The host debugger or emulator must have
878 semihosting enabled for the special svc call to be trapped
879 otherwise the kernel will crash.
881 This is known to work with OpenOCD, as well as
882 ARM's Fast Models, or any other controlling environment
883 that implements semihosting.
885 For more details about semihosting, please see
886 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
888 config DEBUG_LL_UART_8250
889 bool "Kernel low-level debugging via 8250 UART"
891 Say Y here if you wish the debug print routes to direct
892 their output to an 8250 UART. You can use this option
893 to provide the parameters for the 8250 UART rather than
894 selecting one of the platform specific options above if
895 you know the parameters for the port.
897 This option is preferred over the platform specific
898 options; the platform specific options are deprecated
899 and will be soon removed.
901 config DEBUG_LL_UART_EFM32
902 bool "Kernel low-level debugging via efm32 UART"
903 depends on ARCH_EFM32
905 Say Y here if you want the debug print routines to direct
906 their output to an UART or USART port on efm32 based
907 machines. Use the following addresses for DEBUG_UART_PHYS:
915 config DEBUG_LL_UART_PL01X
916 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
918 Say Y here if you wish the debug print routes to direct
919 their output to a PL01x Primecell UART. You can use
920 this option to provide the parameters for the UART
921 rather than selecting one of the platform specific
922 options above if you know the parameters for the port.
924 This option is preferred over the platform specific
925 options; the platform specific options are deprecated
926 and will be soon removed.
930 config DEBUG_EXYNOS_UART
933 config DEBUG_OMAP2PLUS_UART
935 depends on ARCH_OMAP2PLUS
937 config DEBUG_IMX_UART_PORT
938 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
939 DEBUG_IMX25_UART || \
940 DEBUG_IMX21_IMX27_UART || \
941 DEBUG_IMX31_UART || \
942 DEBUG_IMX35_UART || \
943 DEBUG_IMX50_UART || \
944 DEBUG_IMX51_UART || \
945 DEBUG_IMX53_UART || \
946 DEBUG_IMX6Q_UART || \
951 Choose UART port on which kernel low-level debug messages
954 config DEBUG_TEGRA_UART
956 depends on ARCH_TEGRA
958 config DEBUG_STI_UART
962 config DEBUG_MSM_UART
964 depends on ARCH_MSM || ARCH_QCOM
966 config DEBUG_LL_INCLUDE
968 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
969 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
970 default "debug/exynos.S" if DEBUG_EXYNOS_UART
971 default "debug/efm32.S" if DEBUG_LL_UART_EFM32
972 default "debug/icedcc.S" if DEBUG_ICEDCC
973 default "debug/imx.S" if DEBUG_IMX1_UART || \
974 DEBUG_IMX25_UART || \
975 DEBUG_IMX21_IMX27_UART || \
976 DEBUG_IMX31_UART || \
977 DEBUG_IMX35_UART || \
978 DEBUG_IMX50_UART || \
979 DEBUG_IMX51_UART || \
981 DEBUG_IMX6Q_UART || \
983 default "debug/msm.S" if DEBUG_MSM_UART
984 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
985 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
986 default "debug/sti.S" if DEBUG_STI_UART
987 default "debug/tegra.S" if DEBUG_TEGRA_UART
988 default "debug/ux500.S" if DEBUG_UX500_UART
989 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
990 default "debug/vf.S" if DEBUG_VF_UART
991 default "debug/vt8500.S" if DEBUG_VT8500_UART0
992 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
993 default "mach/debug-macro.S"
995 # Compatibility options for PL01x
996 config DEBUG_UART_PL01X
997 def_bool ARCH_EP93XX || \
1004 # Compatibility options for 8250
1005 config DEBUG_UART_8250
1006 def_bool ARCH_DOVE || ARCH_EBSA110 || \
1007 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
1008 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
1009 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \
1010 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
1012 config DEBUG_UART_PHYS
1013 hex "Physical base address of debug UART"
1014 default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0
1015 default 0x01c28000 if DEBUG_SUNXI_UART0
1016 default 0x01c28400 if DEBUG_SUNXI_UART1
1017 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1
1018 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2
1019 default 0x02530c00 if DEBUG_KEYSTONE_UART0
1020 default 0x02531000 if DEBUG_KEYSTONE_UART1
1021 default 0x03010fe0 if ARCH_RPC
1022 default 0x08108300 if DEBUG_DAVINCI_TNETV107X_UART1
1023 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
1024 DEBUG_VEXPRESS_UART0_CA9
1025 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
1026 default 0x10124000 if DEBUG_RK3X_UART0
1027 default 0x10126000 if DEBUG_RK3X_UART1
1028 default 0x101f1000 if ARCH_VERSATILE
1029 default 0x101fb000 if DEBUG_NOMADIK_UART
1030 default 0x16000000 if ARCH_INTEGRATOR
1031 default 0x18000300 if DEBUG_BCM_5301X
1032 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
1033 default 0x20060000 if DEBUG_RK29_UART0
1034 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1035 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1036 default 0x20201000 if DEBUG_BCM2835
1037 default 0x3e000000 if DEBUG_BCM_KONA_UART
1038 default 0x4000e400 if DEBUG_LL_UART_EFM32
1039 default 0x40090000 if ARCH_LPC32XX
1040 default 0x40100000 if DEBUG_PXA_UART1
1041 default 0x42000000 if ARCH_GEMINI
1042 default 0x7c0003f8 if FOOTBRIDGE
1043 default 0x80230000 if DEBUG_PICOXCELL_UART
1044 default 0x80070000 if DEBUG_IMX23_UART
1045 default 0x80074000 if DEBUG_IMX28_UART
1046 default 0x808c0000 if ARCH_EP93XX
1047 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1048 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
1049 default 0xc0013000 if DEBUG_U300_UART
1050 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1051 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1052 default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1053 default 0xd0012000 if DEBUG_MVEBU_UART
1054 default 0xd4017000 if DEBUG_MMP_UART2
1055 default 0xd4018000 if DEBUG_MMP_UART3
1056 default 0xe0000000 if ARCH_SPEAR13XX
1057 default 0xf0000be0 if ARCH_EBSA110
1058 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
1059 default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
1061 default 0xf7fc9000 if DEBUG_BERLIN_UART
1062 default 0xf8b00000 if DEBUG_HI3716_UART
1063 default 0xfcb00000 if DEBUG_HI3620_UART
1064 default 0xfe800000 if ARCH_IOP32X
1065 default 0xffc02000 if DEBUG_SOCFPGA_UART
1066 default 0xffd82340 if ARCH_IOP13XX
1067 default 0xfff36000 if DEBUG_HIGHBANK_UART
1068 default 0xfffff700 if ARCH_IOP33X
1069 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1070 DEBUG_LL_UART_EFM32 || \
1071 DEBUG_UART_8250 || DEBUG_UART_PL01X
1073 config DEBUG_UART_VIRT
1074 hex "Virtual base address of debug UART"
1075 default 0xe0010fe0 if ARCH_RPC
1076 default 0xf0000be0 if ARCH_EBSA110
1077 default 0xf0009000 if DEBUG_CNS3XXX
1078 default 0xf01fb000 if DEBUG_NOMADIK_UART
1079 default 0xf0201000 if DEBUG_BCM2835
1080 default 0xf1000300 if DEBUG_BCM_5301X
1081 default 0xf11f1000 if ARCH_VERSATILE
1082 default 0xf1600000 if ARCH_INTEGRATOR
1083 default 0xf1c28000 if DEBUG_SUNXI_UART0
1084 default 0xf1c28400 if DEBUG_SUNXI_UART1
1085 default 0xf2100000 if DEBUG_PXA_UART1
1086 default 0xf4090000 if ARCH_LPC32XX
1087 default 0xf4200000 if ARCH_GEMINI
1088 default 0xf7fc9000 if DEBUG_BERLIN_UART
1089 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
1090 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
1091 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
1092 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
1093 default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1094 default 0xfd000000 if ARCH_SPEAR13XX
1095 default 0xfd012000 if ARCH_MV78XX0
1096 default 0xfde12000 if ARCH_DOVE
1097 default 0xfe012000 if ARCH_ORION5X
1098 default 0xfe017000 if DEBUG_MMP_UART2
1099 default 0xfe018000 if DEBUG_MMP_UART3
1100 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
1101 default 0xfe230000 if DEBUG_PICOXCELL_UART
1102 default 0xfe300000 if DEBUG_BCM_KONA_UART
1103 default 0xfe800000 if ARCH_IOP32X
1104 default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HI3716_UART
1105 default 0xfeb24000 if DEBUG_RK3X_UART0
1106 default 0xfeb26000 if DEBUG_RK3X_UART1
1107 default 0xfeb30c00 if DEBUG_KEYSTONE_UART0
1108 default 0xfeb31000 if DEBUG_KEYSTONE_UART1
1109 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
1110 default 0xfed60000 if DEBUG_RK29_UART0
1111 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1112 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1113 default 0xfec02000 if DEBUG_SOCFPGA_UART
1114 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0
1115 default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1
1116 default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2
1117 default 0xfed12000 if ARCH_KIRKWOOD
1118 default 0xfedc0000 if ARCH_EP93XX
1119 default 0xfee003f8 if FOOTBRIDGE
1120 default 0xfee08300 if DEBUG_DAVINCI_TNETV107X_UART1
1121 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1122 default 0xfef36000 if DEBUG_HIGHBANK_UART
1123 default 0xfee82340 if ARCH_IOP13XX
1124 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1125 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1126 default 0xfefff700 if ARCH_IOP33X
1127 default 0xff003000 if DEBUG_U300_UART
1128 default DEBUG_UART_PHYS if !MMU
1129 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1130 DEBUG_UART_8250 || DEBUG_UART_PL01X
1132 config DEBUG_UART_8250_SHIFT
1133 int "Register offset shift for the 8250 debug UART"
1134 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1135 default 0 if FOOTBRIDGE || ARCH_IOP32X
1138 config DEBUG_UART_8250_WORD
1139 bool "Use 32-bit accesses for 8250 UART"
1140 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1141 depends on DEBUG_UART_8250_SHIFT >= 2
1142 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
1144 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
1145 DEBUG_DAVINCI_DA8XX_UART2 || DEBUG_DAVINCI_TNETV107X_UART1 || \
1148 config DEBUG_UART_8250_FLOW_CONTROL
1149 bool "Enable flow control for 8250 UART"
1150 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1151 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
1153 config DEBUG_UNCOMPRESS
1155 depends on ARCH_MULTIPLATFORM || ARCH_MSM
1156 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
1157 (!DEBUG_TEGRA_UART || !ZBOOT_ROM)
1159 This option influences the normal decompressor output for
1160 multiplatform kernels. Normally, multiplatform kernels disable
1161 decompressor output because it is not possible to know where to
1162 send the decompressor output.
1164 When this option is set, the selected DEBUG_LL output method
1165 will be re-used for normal decompressor output on multiplatform
1169 config UNCOMPRESS_INCLUDE
1171 default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM
1172 default "mach/uncompress.h"
1178 Say Y here if you want to have an early console using the
1179 kernel low-level debugging functions. Add earlyprintk to your
1180 kernel parameters to enable this console.
1183 bool "On-chip ETM and ETB"
1186 Enables the on-chip embedded trace macrocell and embedded trace
1187 buffer driver that will allow you to collect traces of the
1190 config ARM_KPROBES_TEST
1191 tristate "Kprobes test module"
1192 depends on KPROBES && MODULES
1194 Perform tests of kprobes API and instruction set simulation.
1196 config PID_IN_CONTEXTIDR
1197 bool "Write the current PID to the CONTEXTIDR register"
1198 depends on CPU_COPY_V6
1200 Enabling this option causes the kernel to write the current PID to
1201 the PROCID field of the CONTEXTIDR register, at the expense of some
1202 additional instructions during context switch. Say Y here only if you
1203 are planning to use hardware trace tools with this kernel.
1205 config DEBUG_SET_MODULE_RONX
1206 bool "Set loadable kernel module data as NX and text as RO"
1209 This option helps catch unintended modifications to loadable
1210 kernel module's text and read-only data. It also prevents execution
1211 of module data. Such protection may interfere with run-time code
1212 patching and dynamic kernel tracing - and they might also protect
1213 against certain classes of kernel exploits.
1214 If in doubt, say "N".