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"
116 depends on ARCH_BCM_MOBILE
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_ZYNQ_UART0
180 bool "Kernel low-level debugging on Xilinx Zynq using UART0"
183 Say Y here if you want the debug print routines to direct
184 their output to UART0 on the Zynq platform.
186 config DEBUG_ZYNQ_UART1
187 bool "Kernel low-level debugging on Xilinx Zynq using UART1"
190 Say Y here if you want the debug print routines to direct
191 their output to UART1 on the Zynq platform.
193 If you have a ZC702 board and want early boot messages to
194 appear on the USB serial adaptor, select this option.
196 config DEBUG_DC21285_PORT
197 bool "Kernel low-level debugging messages via footbridge serial port"
198 depends on FOOTBRIDGE
200 Say Y here if you want the debug print routines to direct
201 their output to the serial port in the DC21285 (Footbridge).
203 config DEBUG_FOOTBRIDGE_COM1
204 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
205 depends on FOOTBRIDGE
207 Say Y here if you want the debug print routines to direct
208 their output to the 8250 at PCI COM1.
210 config DEBUG_HI3620_UART
211 bool "Hisilicon HI3620 Debug UART"
212 depends on ARCH_HI3xxx
213 select DEBUG_UART_PL01X
215 Say Y here if you want kernel low-level debugging support
218 config DEBUG_HI3716_UART
219 bool "Hisilicon Hi3716 Debug UART"
220 depends on ARCH_HI3xxx
221 select DEBUG_UART_PL01X
223 Say Y here if you want kernel low-level debugging support
226 config DEBUG_HIGHBANK_UART
227 bool "Kernel low-level debugging messages via Highbank UART"
228 depends on ARCH_HIGHBANK
229 select DEBUG_UART_PL01X
231 Say Y here if you want the debug print routines to direct
232 their output to the UART on Highbank based devices.
234 config DEBUG_IMX1_UART
235 bool "i.MX1 Debug UART"
238 Say Y here if you want kernel low-level debugging support
241 config DEBUG_IMX23_UART
242 bool "i.MX23 Debug UART"
244 select DEBUG_UART_PL01X
246 Say Y here if you want kernel low-level debugging support
249 config DEBUG_IMX25_UART
250 bool "i.MX25 Debug UART"
253 Say Y here if you want kernel low-level debugging support
256 config DEBUG_IMX21_IMX27_UART
257 bool "i.MX21 and i.MX27 Debug UART"
258 depends on SOC_IMX21 || SOC_IMX27
260 Say Y here if you want kernel low-level debugging support
263 config DEBUG_IMX28_UART
264 bool "i.MX28 Debug UART"
266 select DEBUG_UART_PL01X
268 Say Y here if you want kernel low-level debugging support
271 config DEBUG_IMX31_UART
272 bool "i.MX31 Debug UART"
275 Say Y here if you want kernel low-level debugging support
278 config DEBUG_IMX35_UART
279 bool "i.MX35 Debug UART"
282 Say Y here if you want kernel low-level debugging support
285 config DEBUG_IMX50_UART
286 bool "i.MX50 Debug UART"
289 Say Y here if you want kernel low-level debugging support
292 config DEBUG_IMX51_UART
293 bool "i.MX51 Debug UART"
296 Say Y here if you want kernel low-level debugging support
299 config DEBUG_IMX53_UART
300 bool "i.MX53 Debug UART"
303 Say Y here if you want kernel low-level debugging support
306 config DEBUG_IMX6Q_UART
307 bool "i.MX6Q/DL Debug UART"
310 Say Y here if you want kernel low-level debugging support
313 config DEBUG_IMX6SL_UART
314 bool "i.MX6SL Debug UART"
315 depends on SOC_IMX6SL
317 Say Y here if you want kernel low-level debugging support
320 config DEBUG_KEYSTONE_UART0
321 bool "Kernel low-level debugging on KEYSTONE2 using UART0"
322 depends on ARCH_KEYSTONE
323 select DEBUG_UART_8250
325 Say Y here if you want the debug print routines to direct
326 their output to UART0 serial port on KEYSTONE2 devices.
328 config DEBUG_KEYSTONE_UART1
329 bool "Kernel low-level debugging on KEYSTONE2 using UART1"
330 depends on ARCH_KEYSTONE
331 select DEBUG_UART_8250
333 Say Y here if you want the debug print routines to direct
334 their output to UART1 serial port on KEYSTONE2 devices.
336 config DEBUG_MMP_UART2
337 bool "Kernel low-level debugging message via MMP UART2"
339 select DEBUG_UART_8250
341 Say Y here if you want kernel low-level debugging support
344 config DEBUG_MMP_UART3
345 bool "Kernel low-level debugging message via MMP UART3"
347 select DEBUG_UART_8250
349 Say Y here if you want kernel low-level debugging support
352 config DEBUG_MSM_UART1
353 bool "Kernel low-level debugging messages via MSM UART1"
354 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
355 select DEBUG_MSM_UART
357 Say Y here if you want the debug print routines to direct
358 their output to the first serial port on MSM devices.
360 config DEBUG_MSM_UART2
361 bool "Kernel low-level debugging messages via MSM UART2"
362 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
363 select DEBUG_MSM_UART
365 Say Y here if you want the debug print routines to direct
366 their output to the second serial port on MSM devices.
368 config DEBUG_MSM_UART3
369 bool "Kernel low-level debugging messages via MSM UART3"
370 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
371 select DEBUG_MSM_UART
373 Say Y here if you want the debug print routines to direct
374 their output to the third serial port on MSM devices.
376 config DEBUG_MSM8660_UART
377 bool "Kernel low-level debugging messages via MSM 8660 UART"
378 depends on ARCH_MSM8X60
379 select MSM_HAS_DEBUG_UART_HS
380 select DEBUG_MSM_UART
382 Say Y here if you want the debug print routines to direct
383 their output to the serial port on MSM 8660 devices.
385 config DEBUG_MSM8960_UART
386 bool "Kernel low-level debugging messages via MSM 8960 UART"
387 depends on ARCH_MSM8960
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 8960 devices.
394 config DEBUG_MSM8974_UART
395 bool "Kernel low-level debugging messages via MSM 8974 UART"
396 depends on ARCH_MSM8974
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 8974 devices.
403 config DEBUG_MVEBU_UART
404 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
405 depends on ARCH_MVEBU
406 select DEBUG_UART_8250
408 Say Y here if you want kernel low-level debugging support
409 on MVEBU based platforms.
411 This option should be used with the old bootloaders
412 that left the internal registers mapped at
413 0xd0000000. As of today, this is the case on
414 platforms such as the Globalscale Mirabox or the
415 Plathome OpenBlocks AX3, when using the original
418 If the wrong DEBUG_MVEBU_UART* option is selected,
419 when u-boot hands over to the kernel, the system
420 silently crashes, with no serial output at all.
422 config DEBUG_MVEBU_UART_ALTERNATE
423 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
424 depends on ARCH_MVEBU
425 select DEBUG_UART_8250
427 Say Y here if you want kernel low-level debugging support
428 on MVEBU based platforms.
430 This option should be used with the new bootloaders
431 that remap the internal registers at 0xf1000000.
433 If the wrong DEBUG_MVEBU_UART* option is selected,
434 when u-boot hands over to the kernel, the system
435 silently crashes, with no serial output at all.
441 Say Y here if you want kernel low-level debugging support
442 on Vybrid based platforms.
444 config DEBUG_NOMADIK_UART
445 bool "Kernel low-level debugging messages via NOMADIK UART"
446 depends on ARCH_NOMADIK
447 select DEBUG_UART_PL01X
449 Say Y here if you want kernel low-level debugging support
450 on NOMADIK based platforms.
452 config DEBUG_NSPIRE_CLASSIC_UART
453 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
454 depends on ARCH_NSPIRE
455 select DEBUG_UART_8250
457 Say Y here if you want kernel low-level debugging support
458 on TI-NSPIRE classic models.
460 config DEBUG_NSPIRE_CX_UART
461 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
462 depends on ARCH_NSPIRE
463 select DEBUG_UART_PL01X
465 Say Y here if you want kernel low-level debugging support
466 on TI-NSPIRE CX models.
468 config DEBUG_OMAP2UART1
469 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
470 depends on ARCH_OMAP2PLUS
471 select DEBUG_OMAP2PLUS_UART
473 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
474 omap3 torpedo and 3530 lv som.
476 config DEBUG_OMAP2UART2
477 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
478 depends on ARCH_OMAP2PLUS
479 select DEBUG_OMAP2PLUS_UART
481 config DEBUG_OMAP2UART3
482 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
483 depends on ARCH_OMAP2PLUS
484 select DEBUG_OMAP2PLUS_UART
486 config DEBUG_OMAP3UART3
487 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
488 depends on ARCH_OMAP2PLUS
489 select DEBUG_OMAP2PLUS_UART
491 This covers at least cm_t3x, beagle, crane, devkit8000,
492 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
495 config DEBUG_OMAP4UART3
496 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
497 depends on ARCH_OMAP2PLUS
498 select DEBUG_OMAP2PLUS_UART
500 config DEBUG_OMAP3UART4
501 bool "Kernel low-level debugging messages via OMAP36XX UART4"
502 depends on ARCH_OMAP2PLUS
503 select DEBUG_OMAP2PLUS_UART
505 config DEBUG_OMAP4UART4
506 bool "Kernel low-level debugging messages via OMAP4/5 UART4"
507 depends on ARCH_OMAP2PLUS
508 select DEBUG_OMAP2PLUS_UART
510 config DEBUG_TI81XXUART1
511 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
512 depends on ARCH_OMAP2PLUS
513 select DEBUG_OMAP2PLUS_UART
515 config DEBUG_TI81XXUART2
516 bool "Kernel low-level debugging messages via TI81XX UART2"
517 depends on ARCH_OMAP2PLUS
518 select DEBUG_OMAP2PLUS_UART
520 config DEBUG_TI81XXUART3
521 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
522 depends on ARCH_OMAP2PLUS
523 select DEBUG_OMAP2PLUS_UART
525 config DEBUG_AM33XXUART1
526 bool "Kernel low-level debugging messages via AM33XX UART1"
527 depends on ARCH_OMAP2PLUS
528 select DEBUG_OMAP2PLUS_UART
530 config DEBUG_ZOOM_UART
531 bool "Kernel low-level debugging messages via Zoom2/3 UART"
532 depends on ARCH_OMAP2PLUS
533 select DEBUG_OMAP2PLUS_UART
535 config DEBUG_PICOXCELL_UART
536 depends on ARCH_PICOXCELL
537 bool "Use PicoXcell UART for low-level debug"
538 select DEBUG_UART_8250
540 Say Y here if you want kernel low-level debugging support
541 on PicoXcell based platforms.
543 config DEBUG_PXA_UART1
545 bool "Use PXA UART1 for low-level debug"
546 select DEBUG_UART_8250
548 Say Y here if you want kernel low-level debugging support
551 config DEBUG_REALVIEW_STD_PORT
552 bool "RealView Default UART"
553 depends on ARCH_REALVIEW
554 select DEBUG_UART_PL01X
556 Say Y here if you want the debug print routines to direct
557 their output to the serial port on RealView EB, PB11MP, PBA8
560 config DEBUG_REALVIEW_PB1176_PORT
561 bool "RealView PB1176 UART"
562 depends on MACH_REALVIEW_PB1176
563 select DEBUG_UART_PL01X
565 Say Y here if you want the debug print routines to direct
566 their output to the standard serial port on the RealView
569 config DEBUG_RK29_UART0
570 bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
571 depends on ARCH_ROCKCHIP
572 select DEBUG_UART_8250
574 Say Y here if you want kernel low-level debugging support
575 on Rockchip based platforms.
577 config DEBUG_RK29_UART1
578 bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
579 depends on ARCH_ROCKCHIP
580 select DEBUG_UART_8250
582 Say Y here if you want kernel low-level debugging support
583 on Rockchip based platforms.
585 config DEBUG_RK29_UART2
586 bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
587 depends on ARCH_ROCKCHIP
588 select DEBUG_UART_8250
590 Say Y here if you want kernel low-level debugging support
591 on Rockchip based platforms.
593 config DEBUG_RK3X_UART0
594 bool "Kernel low-level debugging messages via Rockchip RK3X UART0"
595 depends on ARCH_ROCKCHIP
596 select DEBUG_UART_8250
598 Say Y here if you want kernel low-level debugging support
599 on Rockchip based platforms.
601 config DEBUG_RK3X_UART1
602 bool "Kernel low-level debugging messages via Rockchip RK3X UART1"
603 depends on ARCH_ROCKCHIP
604 select DEBUG_UART_8250
606 Say Y here if you want kernel low-level debugging support
607 on Rockchip based platforms.
609 config DEBUG_RK3X_UART2
610 bool "Kernel low-level debugging messages via Rockchip RK3X UART2"
611 depends on ARCH_ROCKCHIP
612 select DEBUG_UART_8250
614 Say Y here if you want kernel low-level debugging support
615 on Rockchip based platforms.
617 config DEBUG_RK3X_UART3
618 bool "Kernel low-level debugging messages via Rockchip RK3X UART3"
619 depends on ARCH_ROCKCHIP
620 select DEBUG_UART_8250
622 Say Y here if you want kernel low-level debugging support
623 on Rockchip based platforms.
625 config DEBUG_S3C_UART0
626 depends on PLAT_SAMSUNG
627 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
628 bool "Use S3C UART 0 for low-level debug"
630 Say Y here if you want the debug print routines to direct
631 their output to UART 0. The port must have been initialised
632 by the boot-loader before use.
634 The uncompressor code port configuration is now handled
635 by CONFIG_S3C_LOWLEVEL_UART_PORT.
637 config DEBUG_S3C_UART1
638 depends on PLAT_SAMSUNG
639 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
640 bool "Use S3C UART 1 for low-level debug"
642 Say Y here if you want the debug print routines to direct
643 their output to UART 1. The port must have been initialised
644 by the boot-loader before use.
646 The uncompressor code port configuration is now handled
647 by CONFIG_S3C_LOWLEVEL_UART_PORT.
649 config DEBUG_S3C_UART2
650 depends on PLAT_SAMSUNG
651 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
652 bool "Use S3C UART 2 for low-level debug"
654 Say Y here if you want the debug print routines to direct
655 their output to UART 2. The port must have been initialised
656 by the boot-loader before use.
658 The uncompressor code port configuration is now handled
659 by CONFIG_S3C_LOWLEVEL_UART_PORT.
661 config DEBUG_S3C_UART3
662 depends on PLAT_SAMSUNG && ARCH_EXYNOS
663 select DEBUG_EXYNOS_UART
664 bool "Use S3C UART 3 for low-level debug"
666 Say Y here if you want the debug print routines to direct
667 their output to UART 3. The port must have been initialised
668 by the boot-loader before use.
670 The uncompressor code port configuration is now handled
671 by CONFIG_S3C_LOWLEVEL_UART_PORT.
673 config DEBUG_SOCFPGA_UART
674 depends on ARCH_SOCFPGA
675 bool "Use SOCFPGA UART for low-level debug"
676 select DEBUG_UART_8250
678 Say Y here if you want kernel low-level debugging support
679 on SOCFPGA based platforms.
681 config DEBUG_SUNXI_UART0
682 bool "Kernel low-level debugging messages via sunXi UART0"
683 depends on ARCH_SUNXI
684 select DEBUG_UART_8250
686 Say Y here if you want kernel low-level debugging support
687 on Allwinner A1X based platforms on the UART0.
689 config DEBUG_SUNXI_UART1
690 bool "Kernel low-level debugging messages via sunXi UART1"
691 depends on ARCH_SUNXI
692 select DEBUG_UART_8250
694 Say Y here if you want kernel low-level debugging support
695 on Allwinner A1X based platforms on the UART1.
697 config TEGRA_DEBUG_UART_AUTO_ODMDATA
698 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
699 depends on ARCH_TEGRA
700 select DEBUG_TEGRA_UART
702 Automatically determines which UART to use for low-level
703 debug based on the ODMDATA value. This value is part of
704 the BCT, and is written to the boot memory device using
705 nvflash, or other flashing tool. When bits 19:18 are 3,
706 then bits 17:15 indicate which UART to use; 0/1/2/3/4
709 config TEGRA_DEBUG_UARTA
710 bool "Kernel low-level debugging messages via Tegra UART A"
711 depends on ARCH_TEGRA
712 select DEBUG_TEGRA_UART
714 Say Y here if you want kernel low-level debugging support
715 on Tegra based platforms.
717 config TEGRA_DEBUG_UARTB
718 bool "Kernel low-level debugging messages via Tegra UART B"
719 depends on ARCH_TEGRA
720 select DEBUG_TEGRA_UART
722 Say Y here if you want kernel low-level debugging support
723 on Tegra based platforms.
725 config TEGRA_DEBUG_UARTC
726 bool "Kernel low-level debugging messages via Tegra UART C"
727 depends on ARCH_TEGRA
728 select DEBUG_TEGRA_UART
730 Say Y here if you want kernel low-level debugging support
731 on Tegra based platforms.
733 config TEGRA_DEBUG_UARTD
734 bool "Kernel low-level debugging messages via Tegra UART D"
735 depends on ARCH_TEGRA
736 select DEBUG_TEGRA_UART
738 Say Y here if you want kernel low-level debugging support
739 on Tegra based platforms.
741 config TEGRA_DEBUG_UARTE
742 bool "Kernel low-level debugging messages via Tegra UART E"
743 depends on ARCH_TEGRA
744 select DEBUG_TEGRA_UART
746 Say Y here if you want kernel low-level debugging support
747 on Tegra based platforms.
749 config DEBUG_SIRFPRIMA2_UART1
750 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
751 depends on ARCH_PRIMA2
753 Say Y here if you want the debug print routines to direct
754 their output to the uart1 port on SiRFprimaII devices.
756 config DEBUG_SIRFMARCO_UART1
757 bool "Kernel low-level debugging messages via SiRFmarco UART1"
758 depends on ARCH_MARCO
760 Say Y here if you want the debug print routines to direct
761 their output to the uart1 port on SiRFmarco devices.
763 config STIH41X_DEBUG_ASC2
764 bool "Use StiH415/416 ASC2 UART for low-level debug"
766 select DEBUG_STI_UART
768 Say Y here if you want kernel low-level debugging support
769 on STiH415/416 based platforms like b2000, which has
770 default UART wired up to ASC2.
774 config STIH41X_DEBUG_SBC_ASC1
775 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
777 select DEBUG_STI_UART
779 Say Y here if you want kernel low-level debugging support
780 on STiH415/416 based platforms like b2020. which has
781 default UART wired up to SBC ASC1.
785 config DEBUG_U300_UART
786 bool "Kernel low-level debugging messages via U300 UART0"
788 select DEBUG_UART_PL01X
790 Say Y here if you want the debug print routines to direct
791 their output to the uart port on U300 devices.
793 config DEBUG_UX500_UART
794 depends on ARCH_U8500
795 bool "Use Ux500 UART for low-level debug"
797 Say Y here if you want kernel low-level debugging support
798 on Ux500 based platforms.
800 config DEBUG_VEXPRESS_UART0_DETECT
801 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
802 depends on ARCH_VEXPRESS && CPU_CP15_MMU
804 This option enables a simple heuristic which tries to determine
805 the motherboard's memory map variant (original or RS1) and then
806 choose the relevant UART0 base address.
808 Note that this will only work with standard A-class core tiles,
809 and may fail with non-standard SMM or custom software models.
811 config DEBUG_VEXPRESS_UART0_CA9
812 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
813 depends on ARCH_VEXPRESS
814 select DEBUG_UART_PL01X
816 This option selects UART0 at 0x10009000. Except for custom models,
817 this applies only to the V2P-CA9 tile.
819 config DEBUG_VEXPRESS_UART0_RS1
820 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
821 depends on ARCH_VEXPRESS
822 select DEBUG_UART_PL01X
824 This option selects UART0 at 0x1c090000. This applies to most
825 of the tiles using the RS1 memory map, including all new A-class
826 core tiles, FPGA-based SMMs and software models.
828 config DEBUG_VEXPRESS_UART0_CRX
829 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
830 depends on ARCH_VEXPRESS && !MMU
831 select DEBUG_UART_PL01X
833 This option selects UART0 at 0xb0090000. This is appropriate for
834 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
836 config DEBUG_VT8500_UART0
837 bool "Use UART0 on VIA/Wondermedia SoCs"
838 depends on ARCH_VT8500
840 This option selects UART0 on VIA/Wondermedia System-on-a-chip
841 devices, including VT8500, WM8505, WM8650 and WM8850.
843 config DEBUG_LL_UART_NONE
844 bool "No low-level debugging UART"
845 depends on !ARCH_MULTIPLATFORM
847 Say Y here if your platform doesn't provide a UART option
848 above. This relies on your platform choosing the right UART
849 definition internally in order for low-level debugging to
853 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
855 Say Y here if you want the debug print routines to direct
856 their output to the EmbeddedICE macrocell's DCC channel using
857 co-processor 14. This is known to work on the ARM9 style ICE
858 channel and on the XScale with the PEEDI.
860 Note that the system will appear to hang during boot if there
861 is nothing connected to read from the DCC.
863 config DEBUG_SEMIHOSTING
864 bool "Kernel low-level debug output via semihosting I/O"
866 Semihosting enables code running on an ARM target to use
867 the I/O facilities on a host debugger/emulator through a
868 simple SVC call. The host debugger or emulator must have
869 semihosting enabled for the special svc call to be trapped
870 otherwise the kernel will crash.
872 This is known to work with OpenOCD, as well as
873 ARM's Fast Models, or any other controlling environment
874 that implements semihosting.
876 For more details about semihosting, please see
877 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
879 config DEBUG_LL_UART_8250
880 bool "Kernel low-level debugging via 8250 UART"
882 Say Y here if you wish the debug print routes to direct
883 their output to an 8250 UART. You can use this option
884 to provide the parameters for the 8250 UART rather than
885 selecting one of the platform specific options above if
886 you know the parameters for the port.
888 This option is preferred over the platform specific
889 options; the platform specific options are deprecated
890 and will be soon removed.
892 config DEBUG_LL_UART_EFM32
893 bool "Kernel low-level debugging via efm32 UART"
894 depends on ARCH_EFM32
896 Say Y here if you want the debug print routines to direct
897 their output to an UART or USART port on efm32 based
898 machines. Use the following addresses for DEBUG_UART_PHYS:
906 config DEBUG_LL_UART_PL01X
907 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
909 Say Y here if you wish the debug print routes to direct
910 their output to a PL01x Primecell UART. You can use
911 this option to provide the parameters for the UART
912 rather than selecting one of the platform specific
913 options above if you know the parameters for the port.
915 This option is preferred over the platform specific
916 options; the platform specific options are deprecated
917 and will be soon removed.
921 config DEBUG_EXYNOS_UART
924 config DEBUG_OMAP2PLUS_UART
926 depends on ARCH_OMAP2PLUS
928 config DEBUG_IMX_UART_PORT
929 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
930 DEBUG_IMX25_UART || \
931 DEBUG_IMX21_IMX27_UART || \
932 DEBUG_IMX31_UART || \
933 DEBUG_IMX35_UART || \
934 DEBUG_IMX50_UART || \
935 DEBUG_IMX51_UART || \
936 DEBUG_IMX53_UART || \
937 DEBUG_IMX6Q_UART || \
942 Choose UART port on which kernel low-level debug messages
945 config DEBUG_TEGRA_UART
947 depends on ARCH_TEGRA
949 config DEBUG_STI_UART
953 config DEBUG_MSM_UART
955 depends on ARCH_MSM || ARCH_QCOM
957 config DEBUG_LL_INCLUDE
959 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
960 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
961 default "debug/exynos.S" if DEBUG_EXYNOS_UART
962 default "debug/efm32.S" if DEBUG_LL_UART_EFM32
963 default "debug/icedcc.S" if DEBUG_ICEDCC
964 default "debug/imx.S" if DEBUG_IMX1_UART || \
965 DEBUG_IMX25_UART || \
966 DEBUG_IMX21_IMX27_UART || \
967 DEBUG_IMX31_UART || \
968 DEBUG_IMX35_UART || \
969 DEBUG_IMX50_UART || \
970 DEBUG_IMX51_UART || \
972 DEBUG_IMX6Q_UART || \
974 default "debug/msm.S" if DEBUG_MSM_UART
975 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
976 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
977 default "debug/sti.S" if DEBUG_STI_UART
978 default "debug/tegra.S" if DEBUG_TEGRA_UART
979 default "debug/ux500.S" if DEBUG_UX500_UART
980 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
981 default "debug/vf.S" if DEBUG_VF_UART
982 default "debug/vt8500.S" if DEBUG_VT8500_UART0
983 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
984 default "mach/debug-macro.S"
986 # Compatibility options for PL01x
987 config DEBUG_UART_PL01X
988 def_bool ARCH_EP93XX || \
995 # Compatibility options for 8250
996 config DEBUG_UART_8250
997 def_bool ARCH_DOVE || ARCH_EBSA110 || \
998 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
999 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
1000 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \
1001 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
1003 config DEBUG_UART_PHYS
1004 hex "Physical base address of debug UART"
1005 default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0
1006 default 0x01c28000 if DEBUG_SUNXI_UART0
1007 default 0x01c28400 if DEBUG_SUNXI_UART1
1008 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1
1009 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2
1010 default 0x02530c00 if DEBUG_KEYSTONE_UART0
1011 default 0x02531000 if DEBUG_KEYSTONE_UART1
1012 default 0x03010fe0 if ARCH_RPC
1013 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
1014 DEBUG_VEXPRESS_UART0_CA9
1015 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
1016 default 0x10124000 if DEBUG_RK3X_UART0
1017 default 0x10126000 if DEBUG_RK3X_UART1
1018 default 0x101f1000 if ARCH_VERSATILE
1019 default 0x101fb000 if DEBUG_NOMADIK_UART
1020 default 0x16000000 if ARCH_INTEGRATOR
1021 default 0x18000300 if DEBUG_BCM_5301X
1022 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
1023 default 0x20060000 if DEBUG_RK29_UART0
1024 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1025 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1026 default 0x20201000 if DEBUG_BCM2835
1027 default 0x3e000000 if DEBUG_BCM_KONA_UART
1028 default 0x4000e400 if DEBUG_LL_UART_EFM32
1029 default 0x40090000 if ARCH_LPC32XX
1030 default 0x40100000 if DEBUG_PXA_UART1
1031 default 0x42000000 if ARCH_GEMINI
1032 default 0x7c0003f8 if FOOTBRIDGE
1033 default 0x80070000 if DEBUG_IMX23_UART
1034 default 0x80074000 if DEBUG_IMX28_UART
1035 default 0x80230000 if DEBUG_PICOXCELL_UART
1036 default 0x808c0000 if ARCH_EP93XX
1037 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1038 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
1039 default 0xc0013000 if DEBUG_U300_UART
1040 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1041 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1042 default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1043 default 0xd0012000 if DEBUG_MVEBU_UART
1044 default 0xd4017000 if DEBUG_MMP_UART2
1045 default 0xd4018000 if DEBUG_MMP_UART3
1046 default 0xe0000000 if ARCH_SPEAR13XX
1047 default 0xf0000be0 if ARCH_EBSA110
1048 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
1049 default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
1051 default 0xf7fc9000 if DEBUG_BERLIN_UART
1052 default 0xf8b00000 if DEBUG_HI3716_UART
1053 default 0xfcb00000 if DEBUG_HI3620_UART
1054 default 0xfe800000 if ARCH_IOP32X
1055 default 0xffc02000 if DEBUG_SOCFPGA_UART
1056 default 0xffd82340 if ARCH_IOP13XX
1057 default 0xfff36000 if DEBUG_HIGHBANK_UART
1058 default 0xfffff700 if ARCH_IOP33X
1059 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1060 DEBUG_LL_UART_EFM32 || \
1061 DEBUG_UART_8250 || DEBUG_UART_PL01X
1063 config DEBUG_UART_VIRT
1064 hex "Virtual base address of debug UART"
1065 default 0xe0010fe0 if ARCH_RPC
1066 default 0xf0000be0 if ARCH_EBSA110
1067 default 0xf0009000 if DEBUG_CNS3XXX
1068 default 0xf01fb000 if DEBUG_NOMADIK_UART
1069 default 0xf0201000 if DEBUG_BCM2835
1070 default 0xf1000300 if DEBUG_BCM_5301X
1071 default 0xf11f1000 if ARCH_VERSATILE
1072 default 0xf1600000 if ARCH_INTEGRATOR
1073 default 0xf1c28000 if DEBUG_SUNXI_UART0
1074 default 0xf1c28400 if DEBUG_SUNXI_UART1
1075 default 0xf2100000 if DEBUG_PXA_UART1
1076 default 0xf4090000 if ARCH_LPC32XX
1077 default 0xf4200000 if ARCH_GEMINI
1078 default 0xf7fc9000 if DEBUG_BERLIN_UART
1079 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
1080 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
1081 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
1082 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
1083 default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1084 default 0xfd000000 if ARCH_SPEAR13XX
1085 default 0xfd012000 if ARCH_MV78XX0
1086 default 0xfde12000 if ARCH_DOVE
1087 default 0xfe012000 if ARCH_ORION5X
1088 default 0xfe017000 if DEBUG_MMP_UART2
1089 default 0xfe018000 if DEBUG_MMP_UART3
1090 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
1091 default 0xfe230000 if DEBUG_PICOXCELL_UART
1092 default 0xfe300000 if DEBUG_BCM_KONA_UART
1093 default 0xfe800000 if ARCH_IOP32X
1094 default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HI3716_UART
1095 default 0xfeb24000 if DEBUG_RK3X_UART0
1096 default 0xfeb26000 if DEBUG_RK3X_UART1
1097 default 0xfeb30c00 if DEBUG_KEYSTONE_UART0
1098 default 0xfeb31000 if DEBUG_KEYSTONE_UART1
1099 default 0xfec02000 if DEBUG_SOCFPGA_UART
1100 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
1101 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0
1102 default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1
1103 default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2
1104 default 0xfed12000 if ARCH_KIRKWOOD
1105 default 0xfed60000 if DEBUG_RK29_UART0
1106 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1107 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1108 default 0xfedc0000 if ARCH_EP93XX
1109 default 0xfee003f8 if FOOTBRIDGE
1110 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1111 default 0xfee82340 if ARCH_IOP13XX
1112 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1113 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1114 default 0xfef36000 if DEBUG_HIGHBANK_UART
1115 default 0xfefff700 if ARCH_IOP33X
1116 default 0xff003000 if DEBUG_U300_UART
1117 default DEBUG_UART_PHYS if !MMU
1118 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1119 DEBUG_UART_8250 || DEBUG_UART_PL01X
1121 config DEBUG_UART_8250_SHIFT
1122 int "Register offset shift for the 8250 debug UART"
1123 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1124 default 0 if FOOTBRIDGE || ARCH_IOP32X
1127 config DEBUG_UART_8250_WORD
1128 bool "Use 32-bit accesses for 8250 UART"
1129 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1130 depends on DEBUG_UART_8250_SHIFT >= 2
1131 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
1133 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
1134 DEBUG_DAVINCI_DA8XX_UART2 || \
1137 config DEBUG_UART_8250_FLOW_CONTROL
1138 bool "Enable flow control for 8250 UART"
1139 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1140 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
1142 config DEBUG_UNCOMPRESS
1144 depends on ARCH_MULTIPLATFORM || ARCH_MSM || PLAT_SAMSUNG
1145 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
1146 (!DEBUG_TEGRA_UART || !ZBOOT_ROM)
1148 This option influences the normal decompressor output for
1149 multiplatform kernels. Normally, multiplatform kernels disable
1150 decompressor output because it is not possible to know where to
1151 send the decompressor output.
1153 When this option is set, the selected DEBUG_LL output method
1154 will be re-used for normal decompressor output on multiplatform
1158 config UNCOMPRESS_INCLUDE
1160 default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM || \
1161 PLAT_SAMSUNG || ARCH_EFM32
1162 default "mach/uncompress.h"
1168 Say Y here if you want to have an early console using the
1169 kernel low-level debugging functions. Add earlyprintk to your
1170 kernel parameters to enable this console.
1173 bool "On-chip ETM and ETB"
1176 Enables the on-chip embedded trace macrocell and embedded trace
1177 buffer driver that will allow you to collect traces of the
1180 config ARM_KPROBES_TEST
1181 tristate "Kprobes test module"
1182 depends on KPROBES && MODULES
1184 Perform tests of kprobes API and instruction set simulation.
1186 config PID_IN_CONTEXTIDR
1187 bool "Write the current PID to the CONTEXTIDR register"
1188 depends on CPU_COPY_V6
1190 Enabling this option causes the kernel to write the current PID to
1191 the PROCID field of the CONTEXTIDR register, at the expense of some
1192 additional instructions during context switch. Say Y here only if you
1193 are planning to use hardware trace tools with this kernel.
1195 config DEBUG_SET_MODULE_RONX
1196 bool "Set loadable kernel module data as NX and text as RO"
1199 This option helps catch unintended modifications to loadable
1200 kernel module's text and read-only data. It also prevents execution
1201 of module data. Such protection may interfere with run-time code
1202 patching and dynamic kernel tracing - and they might also protect
1203 against certain classes of kernel exploits.
1204 If in doubt, say "N".