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_KONA_UART
110 bool "Kernel low-level debugging messages via BCM KONA UART"
112 select DEBUG_UART_8250
114 Say Y here if you want kernel low-level debugging support
115 on Broadcom SoC platforms.
116 This low level debug works for Broadcom
117 mobile SoCs in the Kona family of chips (e.g. bcm28155,
120 config DEBUG_BERLIN_UART
121 bool "Marvell Berlin SoC Debug UART"
122 depends on ARCH_BERLIN
123 select DEBUG_UART_8250
125 Say Y here if you want kernel low-level debugging support
126 on Marvell Berlin SoC based platforms.
128 config DEBUG_CLPS711X_UART1
129 bool "Kernel low-level debugging messages via UART1"
130 depends on ARCH_CLPS711X
132 Say Y here if you want the debug print routines to direct
133 their output to the first serial port on these devices.
135 config DEBUG_CLPS711X_UART2
136 bool "Kernel low-level debugging messages via UART2"
137 depends on ARCH_CLPS711X
139 Say Y here if you want the debug print routines to direct
140 their output to the second serial port on these devices.
143 bool "Kernel Kernel low-level debugging on Cavium Networks CNS3xxx"
144 depends on ARCH_CNS3XXX
145 select DEBUG_UART_PL01X
147 Say Y here if you want the debug print routines to direct
148 their output to the CNS3xxx UART0.
150 config DEBUG_DAVINCI_DA8XX_UART1
151 bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
152 depends on ARCH_DAVINCI_DA8XX
153 select DEBUG_UART_8250
155 Say Y here if you want the debug print routines to direct
156 their output to UART1 serial port on DaVinci DA8XX devices.
158 config DEBUG_DAVINCI_DA8XX_UART2
159 bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
160 depends on ARCH_DAVINCI_DA8XX
161 select DEBUG_UART_8250
163 Say Y here if you want the debug print routines to direct
164 their output to UART2 serial port on DaVinci DA8XX devices.
166 config DEBUG_DAVINCI_DMx_UART0
167 bool "Kernel low-level debugging on DaVinci DMx using UART0"
168 depends on ARCH_DAVINCI_DMx
169 select DEBUG_UART_8250
171 Say Y here if you want the debug print routines to direct
172 their output to UART0 serial port on DaVinci DMx devices.
174 config DEBUG_DAVINCI_TNETV107X_UART1
175 bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
176 depends on ARCH_DAVINCI_TNETV107X
177 select DEBUG_UART_8250
179 Say Y here if you want the debug print routines to direct
180 their output to UART1 serial port on DaVinci TNETV107X
183 config DEBUG_ZYNQ_UART0
184 bool "Kernel low-level debugging on Xilinx Zynq using UART0"
187 Say Y here if you want the debug print routines to direct
188 their output to UART0 on the Zynq platform.
190 config DEBUG_ZYNQ_UART1
191 bool "Kernel low-level debugging on Xilinx Zynq using UART1"
194 Say Y here if you want the debug print routines to direct
195 their output to UART1 on the Zynq platform.
197 If you have a ZC702 board and want early boot messages to
198 appear on the USB serial adaptor, select this option.
200 config DEBUG_DC21285_PORT
201 bool "Kernel low-level debugging messages via footbridge serial port"
202 depends on FOOTBRIDGE
204 Say Y here if you want the debug print routines to direct
205 their output to the serial port in the DC21285 (Footbridge).
207 config DEBUG_FOOTBRIDGE_COM1
208 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
209 depends on FOOTBRIDGE
211 Say Y here if you want the debug print routines to direct
212 their output to the 8250 at PCI COM1.
214 config DEBUG_HI3620_UART
215 bool "Hisilicon HI3620 Debug UART"
216 depends on ARCH_HI3xxx
217 select DEBUG_UART_PL01X
219 Say Y here if you want kernel low-level debugging support
222 config DEBUG_HI3716_UART
223 bool "Hisilicon Hi3716 Debug UART"
224 depends on ARCH_HI3xxx
225 select DEBUG_UART_PL01X
227 Say Y here if you want kernel low-level debugging support
230 config DEBUG_HIGHBANK_UART
231 bool "Kernel low-level debugging messages via Highbank UART"
232 depends on ARCH_HIGHBANK
233 select DEBUG_UART_PL01X
235 Say Y here if you want the debug print routines to direct
236 their output to the UART on Highbank based devices.
238 config DEBUG_IMX1_UART
239 bool "i.MX1 Debug UART"
242 Say Y here if you want kernel low-level debugging support
245 config DEBUG_IMX23_UART
246 bool "i.MX23 Debug UART"
248 select DEBUG_UART_PL01X
250 Say Y here if you want kernel low-level debugging support
253 config DEBUG_IMX25_UART
254 bool "i.MX25 Debug UART"
257 Say Y here if you want kernel low-level debugging support
260 config DEBUG_IMX21_IMX27_UART
261 bool "i.MX21 and i.MX27 Debug UART"
262 depends on SOC_IMX21 || SOC_IMX27
264 Say Y here if you want kernel low-level debugging support
267 config DEBUG_IMX28_UART
268 bool "i.MX28 Debug UART"
270 select DEBUG_UART_PL01X
272 Say Y here if you want kernel low-level debugging support
275 config DEBUG_IMX31_UART
276 bool "i.MX31 Debug UART"
279 Say Y here if you want kernel low-level debugging support
282 config DEBUG_IMX35_UART
283 bool "i.MX35 Debug UART"
286 Say Y here if you want kernel low-level debugging support
289 config DEBUG_IMX50_UART
290 bool "i.MX50 Debug UART"
293 Say Y here if you want kernel low-level debugging support
296 config DEBUG_IMX51_UART
297 bool "i.MX51 Debug UART"
300 Say Y here if you want kernel low-level debugging support
303 config DEBUG_IMX53_UART
304 bool "i.MX53 Debug UART"
307 Say Y here if you want kernel low-level debugging support
310 config DEBUG_IMX6Q_UART
311 bool "i.MX6Q/DL Debug UART"
314 Say Y here if you want kernel low-level debugging support
317 config DEBUG_IMX6SL_UART
318 bool "i.MX6SL Debug UART"
319 depends on SOC_IMX6SL
321 Say Y here if you want kernel low-level debugging support
324 config DEBUG_IMX6SX_UART
325 bool "i.MX6SX Debug UART"
326 depends on SOC_IMX6SX
328 Say Y here if you want kernel low-level debugging support
331 config DEBUG_KEYSTONE_UART0
332 bool "Kernel low-level debugging on KEYSTONE2 using UART0"
333 depends on ARCH_KEYSTONE
334 select DEBUG_UART_8250
336 Say Y here if you want the debug print routines to direct
337 their output to UART0 serial port on KEYSTONE2 devices.
339 config DEBUG_KEYSTONE_UART1
340 bool "Kernel low-level debugging on KEYSTONE2 using UART1"
341 depends on ARCH_KEYSTONE
342 select DEBUG_UART_8250
344 Say Y here if you want the debug print routines to direct
345 their output to UART1 serial port on KEYSTONE2 devices.
347 config DEBUG_MMP_UART2
348 bool "Kernel low-level debugging message via MMP UART2"
350 select DEBUG_UART_8250
352 Say Y here if you want kernel low-level debugging support
355 config DEBUG_MMP_UART3
356 bool "Kernel low-level debugging message via MMP UART3"
358 select DEBUG_UART_8250
360 Say Y here if you want kernel low-level debugging support
363 config DEBUG_MSM_UART1
364 bool "Kernel low-level debugging messages via MSM UART1"
365 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
366 select DEBUG_MSM_UART
368 Say Y here if you want the debug print routines to direct
369 their output to the first serial port on MSM devices.
371 config DEBUG_MSM_UART2
372 bool "Kernel low-level debugging messages via MSM UART2"
373 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
374 select DEBUG_MSM_UART
376 Say Y here if you want the debug print routines to direct
377 their output to the second serial port on MSM devices.
379 config DEBUG_MSM_UART3
380 bool "Kernel low-level debugging messages via MSM UART3"
381 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
382 select DEBUG_MSM_UART
384 Say Y here if you want the debug print routines to direct
385 their output to the third serial port on MSM devices.
387 config DEBUG_MSM8660_UART
388 bool "Kernel low-level debugging messages via MSM 8660 UART"
389 depends on ARCH_MSM8X60
390 select MSM_HAS_DEBUG_UART_HS
391 select DEBUG_MSM_UART
393 Say Y here if you want the debug print routines to direct
394 their output to the serial port on MSM 8660 devices.
396 config DEBUG_MSM8960_UART
397 bool "Kernel low-level debugging messages via MSM 8960 UART"
398 depends on ARCH_MSM8960
399 select MSM_HAS_DEBUG_UART_HS
400 select DEBUG_MSM_UART
402 Say Y here if you want the debug print routines to direct
403 their output to the serial port on MSM 8960 devices.
405 config DEBUG_MSM8974_UART
406 bool "Kernel low-level debugging messages via MSM 8974 UART"
407 depends on ARCH_MSM8974
408 select MSM_HAS_DEBUG_UART_HS
409 select DEBUG_MSM_UART
411 Say Y here if you want the debug print routines to direct
412 their output to the serial port on MSM 8974 devices.
414 config DEBUG_MVEBU_UART
415 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
416 depends on ARCH_MVEBU
417 select DEBUG_UART_8250
419 Say Y here if you want kernel low-level debugging support
420 on MVEBU based platforms.
422 This option should be used with the old bootloaders
423 that left the internal registers mapped at
424 0xd0000000. As of today, this is the case on
425 platforms such as the Globalscale Mirabox or the
426 Plathome OpenBlocks AX3, when using the original
429 If the wrong DEBUG_MVEBU_UART* option is selected,
430 when u-boot hands over to the kernel, the system
431 silently crashes, with no serial output at all.
433 config DEBUG_MVEBU_UART_ALTERNATE
434 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
435 depends on ARCH_MVEBU
436 select DEBUG_UART_8250
438 Say Y here if you want kernel low-level debugging support
439 on MVEBU based platforms.
441 This option should be used with the new bootloaders
442 that remap the internal registers at 0xf1000000.
444 If the wrong DEBUG_MVEBU_UART* option is selected,
445 when u-boot hands over to the kernel, the system
446 silently crashes, with no serial output at all.
452 Say Y here if you want kernel low-level debugging support
453 on Vybrid based platforms.
455 config DEBUG_NOMADIK_UART
456 bool "Kernel low-level debugging messages via NOMADIK UART"
457 depends on ARCH_NOMADIK
458 select DEBUG_UART_PL01X
460 Say Y here if you want kernel low-level debugging support
461 on NOMADIK based platforms.
463 config DEBUG_NSPIRE_CLASSIC_UART
464 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
465 depends on ARCH_NSPIRE
466 select DEBUG_UART_8250
468 Say Y here if you want kernel low-level debugging support
469 on TI-NSPIRE classic models.
471 config DEBUG_NSPIRE_CX_UART
472 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
473 depends on ARCH_NSPIRE
474 select DEBUG_UART_PL01X
476 Say Y here if you want kernel low-level debugging support
477 on TI-NSPIRE CX models.
479 config DEBUG_OMAP2UART1
480 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
481 depends on ARCH_OMAP2PLUS
482 select DEBUG_OMAP2PLUS_UART
484 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
485 omap3 torpedo and 3530 lv som.
487 config DEBUG_OMAP2UART2
488 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
489 depends on ARCH_OMAP2PLUS
490 select DEBUG_OMAP2PLUS_UART
492 config DEBUG_OMAP2UART3
493 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
494 depends on ARCH_OMAP2PLUS
495 select DEBUG_OMAP2PLUS_UART
497 config DEBUG_OMAP3UART3
498 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
499 depends on ARCH_OMAP2PLUS
500 select DEBUG_OMAP2PLUS_UART
502 This covers at least cm_t3x, beagle, crane, devkit8000,
503 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
506 config DEBUG_OMAP4UART3
507 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
508 depends on ARCH_OMAP2PLUS
509 select DEBUG_OMAP2PLUS_UART
511 config DEBUG_OMAP3UART4
512 bool "Kernel low-level debugging messages via OMAP36XX UART4"
513 depends on ARCH_OMAP2PLUS
514 select DEBUG_OMAP2PLUS_UART
516 config DEBUG_OMAP4UART4
517 bool "Kernel low-level debugging messages via OMAP4/5 UART4"
518 depends on ARCH_OMAP2PLUS
519 select DEBUG_OMAP2PLUS_UART
521 config DEBUG_TI81XXUART1
522 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
523 depends on ARCH_OMAP2PLUS
524 select DEBUG_OMAP2PLUS_UART
526 config DEBUG_TI81XXUART2
527 bool "Kernel low-level debugging messages via TI81XX UART2"
528 depends on ARCH_OMAP2PLUS
529 select DEBUG_OMAP2PLUS_UART
531 config DEBUG_TI81XXUART3
532 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
533 depends on ARCH_OMAP2PLUS
534 select DEBUG_OMAP2PLUS_UART
536 config DEBUG_AM33XXUART1
537 bool "Kernel low-level debugging messages via AM33XX UART1"
538 depends on ARCH_OMAP2PLUS
539 select DEBUG_OMAP2PLUS_UART
541 config DEBUG_ZOOM_UART
542 bool "Kernel low-level debugging messages via Zoom2/3 UART"
543 depends on ARCH_OMAP2PLUS
544 select DEBUG_OMAP2PLUS_UART
546 config DEBUG_PICOXCELL_UART
547 depends on ARCH_PICOXCELL
548 bool "Use PicoXcell UART for low-level debug"
549 select DEBUG_UART_8250
551 Say Y here if you want kernel low-level debugging support
552 on PicoXcell based platforms.
554 config DEBUG_PXA_UART1
556 bool "Use PXA UART1 for low-level debug"
557 select DEBUG_UART_8250
559 Say Y here if you want kernel low-level debugging support
562 config DEBUG_REALVIEW_STD_PORT
563 bool "RealView Default UART"
564 depends on ARCH_REALVIEW
565 select DEBUG_UART_PL01X
567 Say Y here if you want the debug print routines to direct
568 their output to the serial port on RealView EB, PB11MP, PBA8
571 config DEBUG_REALVIEW_PB1176_PORT
572 bool "RealView PB1176 UART"
573 depends on MACH_REALVIEW_PB1176
574 select DEBUG_UART_PL01X
576 Say Y here if you want the debug print routines to direct
577 their output to the standard serial port on the RealView
580 config DEBUG_RK29_UART0
581 bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
582 depends on ARCH_ROCKCHIP
583 select DEBUG_UART_8250
585 Say Y here if you want kernel low-level debugging support
586 on Rockchip based platforms.
588 config DEBUG_RK29_UART1
589 bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
590 depends on ARCH_ROCKCHIP
591 select DEBUG_UART_8250
593 Say Y here if you want kernel low-level debugging support
594 on Rockchip based platforms.
596 config DEBUG_RK29_UART2
597 bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
598 depends on ARCH_ROCKCHIP
599 select DEBUG_UART_8250
601 Say Y here if you want kernel low-level debugging support
602 on Rockchip based platforms.
604 config DEBUG_RK3X_UART0
605 bool "Kernel low-level debugging messages via Rockchip RK3X UART0"
606 depends on ARCH_ROCKCHIP
607 select DEBUG_UART_8250
609 Say Y here if you want kernel low-level debugging support
610 on Rockchip based platforms.
612 config DEBUG_RK3X_UART1
613 bool "Kernel low-level debugging messages via Rockchip RK3X UART1"
614 depends on ARCH_ROCKCHIP
615 select DEBUG_UART_8250
617 Say Y here if you want kernel low-level debugging support
618 on Rockchip based platforms.
620 config DEBUG_RK3X_UART2
621 bool "Kernel low-level debugging messages via Rockchip RK3X UART2"
622 depends on ARCH_ROCKCHIP
623 select DEBUG_UART_8250
625 Say Y here if you want kernel low-level debugging support
626 on Rockchip based platforms.
628 config DEBUG_RK3X_UART3
629 bool "Kernel low-level debugging messages via Rockchip RK3X UART3"
630 depends on ARCH_ROCKCHIP
631 select DEBUG_UART_8250
633 Say Y here if you want kernel low-level debugging support
634 on Rockchip based platforms.
636 config DEBUG_S3C_UART0
637 depends on PLAT_SAMSUNG
638 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
639 bool "Use S3C UART 0 for low-level debug"
641 Say Y here if you want the debug print routines to direct
642 their output to UART 0. The port must have been initialised
643 by the boot-loader before use.
645 The uncompressor code port configuration is now handled
646 by CONFIG_S3C_LOWLEVEL_UART_PORT.
648 config DEBUG_S3C_UART1
649 depends on PLAT_SAMSUNG
650 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
651 bool "Use S3C UART 1 for low-level debug"
653 Say Y here if you want the debug print routines to direct
654 their output to UART 1. The port must have been initialised
655 by the boot-loader before use.
657 The uncompressor code port configuration is now handled
658 by CONFIG_S3C_LOWLEVEL_UART_PORT.
660 config DEBUG_S3C_UART2
661 depends on PLAT_SAMSUNG
662 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
663 bool "Use S3C UART 2 for low-level debug"
665 Say Y here if you want the debug print routines to direct
666 their output to UART 2. The port must have been initialised
667 by the boot-loader before use.
669 The uncompressor code port configuration is now handled
670 by CONFIG_S3C_LOWLEVEL_UART_PORT.
672 config DEBUG_S3C_UART3
673 depends on PLAT_SAMSUNG && ARCH_EXYNOS
674 select DEBUG_EXYNOS_UART
675 bool "Use S3C UART 3 for low-level debug"
677 Say Y here if you want the debug print routines to direct
678 their output to UART 3. The port must have been initialised
679 by the boot-loader before use.
681 The uncompressor code port configuration is now handled
682 by CONFIG_S3C_LOWLEVEL_UART_PORT.
684 config DEBUG_SOCFPGA_UART
685 depends on ARCH_SOCFPGA
686 bool "Use SOCFPGA UART for low-level debug"
687 select DEBUG_UART_8250
689 Say Y here if you want kernel low-level debugging support
690 on SOCFPGA based platforms.
692 config DEBUG_SUNXI_UART0
693 bool "Kernel low-level debugging messages via sunXi UART0"
694 depends on ARCH_SUNXI
695 select DEBUG_UART_8250
697 Say Y here if you want kernel low-level debugging support
698 on Allwinner A1X based platforms on the UART0.
700 config DEBUG_SUNXI_UART1
701 bool "Kernel low-level debugging messages via sunXi UART1"
702 depends on ARCH_SUNXI
703 select DEBUG_UART_8250
705 Say Y here if you want kernel low-level debugging support
706 on Allwinner A1X based platforms on the UART1.
708 config TEGRA_DEBUG_UART_AUTO_ODMDATA
709 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
710 depends on ARCH_TEGRA
711 select DEBUG_TEGRA_UART
713 Automatically determines which UART to use for low-level
714 debug based on the ODMDATA value. This value is part of
715 the BCT, and is written to the boot memory device using
716 nvflash, or other flashing tool. When bits 19:18 are 3,
717 then bits 17:15 indicate which UART to use; 0/1/2/3/4
720 config TEGRA_DEBUG_UARTA
721 bool "Kernel low-level debugging messages via Tegra UART A"
722 depends on ARCH_TEGRA
723 select DEBUG_TEGRA_UART
725 Say Y here if you want kernel low-level debugging support
726 on Tegra based platforms.
728 config TEGRA_DEBUG_UARTB
729 bool "Kernel low-level debugging messages via Tegra UART B"
730 depends on ARCH_TEGRA
731 select DEBUG_TEGRA_UART
733 Say Y here if you want kernel low-level debugging support
734 on Tegra based platforms.
736 config TEGRA_DEBUG_UARTC
737 bool "Kernel low-level debugging messages via Tegra UART C"
738 depends on ARCH_TEGRA
739 select DEBUG_TEGRA_UART
741 Say Y here if you want kernel low-level debugging support
742 on Tegra based platforms.
744 config TEGRA_DEBUG_UARTD
745 bool "Kernel low-level debugging messages via Tegra UART D"
746 depends on ARCH_TEGRA
747 select DEBUG_TEGRA_UART
749 Say Y here if you want kernel low-level debugging support
750 on Tegra based platforms.
752 config TEGRA_DEBUG_UARTE
753 bool "Kernel low-level debugging messages via Tegra UART E"
754 depends on ARCH_TEGRA
755 select DEBUG_TEGRA_UART
757 Say Y here if you want kernel low-level debugging support
758 on Tegra based platforms.
760 config DEBUG_SIRFPRIMA2_UART1
761 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
762 depends on ARCH_PRIMA2
764 Say Y here if you want the debug print routines to direct
765 their output to the uart1 port on SiRFprimaII devices.
767 config DEBUG_SIRFMARCO_UART1
768 bool "Kernel low-level debugging messages via SiRFmarco UART1"
769 depends on ARCH_MARCO
771 Say Y here if you want the debug print routines to direct
772 their output to the uart1 port on SiRFmarco devices.
774 config STIH41X_DEBUG_ASC2
775 bool "Use StiH415/416 ASC2 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 b2000, which has
781 default UART wired up to ASC2.
785 config STIH41X_DEBUG_SBC_ASC1
786 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
788 select DEBUG_STI_UART
790 Say Y here if you want kernel low-level debugging support
791 on STiH415/416 based platforms like b2020. which has
792 default UART wired up to SBC ASC1.
796 config DEBUG_U300_UART
797 bool "Kernel low-level debugging messages via U300 UART0"
799 select DEBUG_UART_PL01X
801 Say Y here if you want the debug print routines to direct
802 their output to the uart port on U300 devices.
804 config DEBUG_UX500_UART
805 depends on ARCH_U8500
806 bool "Use Ux500 UART for low-level debug"
808 Say Y here if you want kernel low-level debugging support
809 on Ux500 based platforms.
811 config DEBUG_VEXPRESS_UART0_DETECT
812 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
813 depends on ARCH_VEXPRESS && CPU_CP15_MMU
815 This option enables a simple heuristic which tries to determine
816 the motherboard's memory map variant (original or RS1) and then
817 choose the relevant UART0 base address.
819 Note that this will only work with standard A-class core tiles,
820 and may fail with non-standard SMM or custom software models.
822 config DEBUG_VEXPRESS_UART0_CA9
823 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
824 depends on ARCH_VEXPRESS
825 select DEBUG_UART_PL01X
827 This option selects UART0 at 0x10009000. Except for custom models,
828 this applies only to the V2P-CA9 tile.
830 config DEBUG_VEXPRESS_UART0_RS1
831 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
832 depends on ARCH_VEXPRESS
833 select DEBUG_UART_PL01X
835 This option selects UART0 at 0x1c090000. This applies to most
836 of the tiles using the RS1 memory map, including all new A-class
837 core tiles, FPGA-based SMMs and software models.
839 config DEBUG_VEXPRESS_UART0_CRX
840 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
841 depends on ARCH_VEXPRESS && !MMU
842 select DEBUG_UART_PL01X
844 This option selects UART0 at 0xb0090000. This is appropriate for
845 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
847 config DEBUG_VT8500_UART0
848 bool "Use UART0 on VIA/Wondermedia SoCs"
849 depends on ARCH_VT8500
851 This option selects UART0 on VIA/Wondermedia System-on-a-chip
852 devices, including VT8500, WM8505, WM8650 and WM8850.
854 config DEBUG_LL_UART_NONE
855 bool "No low-level debugging UART"
856 depends on !ARCH_MULTIPLATFORM
858 Say Y here if your platform doesn't provide a UART option
859 above. This relies on your platform choosing the right UART
860 definition internally in order for low-level debugging to
864 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
866 Say Y here if you want the debug print routines to direct
867 their output to the EmbeddedICE macrocell's DCC channel using
868 co-processor 14. This is known to work on the ARM9 style ICE
869 channel and on the XScale with the PEEDI.
871 Note that the system will appear to hang during boot if there
872 is nothing connected to read from the DCC.
874 config DEBUG_SEMIHOSTING
875 bool "Kernel low-level debug output via semihosting I/O"
877 Semihosting enables code running on an ARM target to use
878 the I/O facilities on a host debugger/emulator through a
879 simple SVC call. The host debugger or emulator must have
880 semihosting enabled for the special svc call to be trapped
881 otherwise the kernel will crash.
883 This is known to work with OpenOCD, as well as
884 ARM's Fast Models, or any other controlling environment
885 that implements semihosting.
887 For more details about semihosting, please see
888 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
890 config DEBUG_LL_UART_8250
891 bool "Kernel low-level debugging via 8250 UART"
893 Say Y here if you wish the debug print routes to direct
894 their output to an 8250 UART. You can use this option
895 to provide the parameters for the 8250 UART rather than
896 selecting one of the platform specific options above if
897 you know the parameters for the port.
899 This option is preferred over the platform specific
900 options; the platform specific options are deprecated
901 and will be soon removed.
903 config DEBUG_LL_UART_EFM32
904 bool "Kernel low-level debugging via efm32 UART"
905 depends on ARCH_EFM32
907 Say Y here if you want the debug print routines to direct
908 their output to an UART or USART port on efm32 based
909 machines. Use the following addresses for DEBUG_UART_PHYS:
917 config DEBUG_LL_UART_PL01X
918 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
920 Say Y here if you wish the debug print routes to direct
921 their output to a PL01x Primecell UART. You can use
922 this option to provide the parameters for the UART
923 rather than selecting one of the platform specific
924 options above if you know the parameters for the port.
926 This option is preferred over the platform specific
927 options; the platform specific options are deprecated
928 and will be soon removed.
932 config DEBUG_EXYNOS_UART
935 config DEBUG_OMAP2PLUS_UART
937 depends on ARCH_OMAP2PLUS
939 config DEBUG_IMX_UART_PORT
940 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
941 DEBUG_IMX25_UART || \
942 DEBUG_IMX21_IMX27_UART || \
943 DEBUG_IMX31_UART || \
944 DEBUG_IMX35_UART || \
945 DEBUG_IMX50_UART || \
946 DEBUG_IMX51_UART || \
947 DEBUG_IMX53_UART || \
948 DEBUG_IMX6Q_UART || \
949 DEBUG_IMX6SL_UART || \
954 Choose UART port on which kernel low-level debug messages
957 config DEBUG_TEGRA_UART
959 depends on ARCH_TEGRA
961 config DEBUG_STI_UART
965 config DEBUG_MSM_UART
969 config DEBUG_LL_INCLUDE
971 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
972 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
973 default "debug/exynos.S" if DEBUG_EXYNOS_UART
974 default "debug/efm32.S" if DEBUG_LL_UART_EFM32
975 default "debug/icedcc.S" if DEBUG_ICEDCC
976 default "debug/imx.S" if DEBUG_IMX1_UART || \
977 DEBUG_IMX25_UART || \
978 DEBUG_IMX21_IMX27_UART || \
979 DEBUG_IMX31_UART || \
980 DEBUG_IMX35_UART || \
981 DEBUG_IMX50_UART || \
982 DEBUG_IMX51_UART || \
984 DEBUG_IMX6Q_UART || \
985 DEBUG_IMX6SL_UART || \
987 default "debug/msm.S" if DEBUG_MSM_UART
988 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
989 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
990 default "debug/sti.S" if DEBUG_STI_UART
991 default "debug/tegra.S" if DEBUG_TEGRA_UART
992 default "debug/ux500.S" if DEBUG_UX500_UART
993 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
994 default "debug/vf.S" if DEBUG_VF_UART
995 default "debug/vt8500.S" if DEBUG_VT8500_UART0
996 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
997 default "mach/debug-macro.S"
999 # Compatibility options for PL01x
1000 config DEBUG_UART_PL01X
1001 def_bool ARCH_EP93XX || \
1002 ARCH_INTEGRATOR || \
1008 # Compatibility options for 8250
1009 config DEBUG_UART_8250
1010 def_bool ARCH_DOVE || ARCH_EBSA110 || \
1011 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
1012 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
1013 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \
1014 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
1016 config DEBUG_UART_PHYS
1017 hex "Physical base address of debug UART"
1018 default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0
1019 default 0x01c28000 if DEBUG_SUNXI_UART0
1020 default 0x01c28400 if DEBUG_SUNXI_UART1
1021 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1
1022 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2
1023 default 0x02530c00 if DEBUG_KEYSTONE_UART0
1024 default 0x02531000 if DEBUG_KEYSTONE_UART1
1025 default 0x03010fe0 if ARCH_RPC
1026 default 0x08108300 if DEBUG_DAVINCI_TNETV107X_UART1
1027 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
1028 DEBUG_VEXPRESS_UART0_CA9
1029 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
1030 default 0x10124000 if DEBUG_RK3X_UART0
1031 default 0x10126000 if DEBUG_RK3X_UART1
1032 default 0x101f1000 if ARCH_VERSATILE
1033 default 0x101fb000 if DEBUG_NOMADIK_UART
1034 default 0x16000000 if ARCH_INTEGRATOR
1035 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
1036 default 0x20060000 if DEBUG_RK29_UART0
1037 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1038 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1039 default 0x20201000 if DEBUG_BCM2835
1040 default 0x3e000000 if DEBUG_BCM_KONA_UART
1041 default 0x4000e400 if DEBUG_LL_UART_EFM32
1042 default 0x40090000 if ARCH_LPC32XX
1043 default 0x40100000 if DEBUG_PXA_UART1
1044 default 0x42000000 if ARCH_GEMINI
1045 default 0x7c0003f8 if FOOTBRIDGE
1046 default 0x80230000 if DEBUG_PICOXCELL_UART
1047 default 0x80070000 if DEBUG_IMX23_UART
1048 default 0x80074000 if DEBUG_IMX28_UART
1049 default 0x808c0000 if ARCH_EP93XX
1050 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1051 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
1052 default 0xc0013000 if DEBUG_U300_UART
1053 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1054 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1055 default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1056 default 0xd0012000 if DEBUG_MVEBU_UART
1057 default 0xd4017000 if DEBUG_MMP_UART2
1058 default 0xd4018000 if DEBUG_MMP_UART3
1059 default 0xe0000000 if ARCH_SPEAR13XX
1060 default 0xf0000be0 if ARCH_EBSA110
1061 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
1062 default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
1064 default 0xf7fc9000 if DEBUG_BERLIN_UART
1065 default 0xf8b00000 if DEBUG_HI3716_UART
1066 default 0xfcb00000 if DEBUG_HI3620_UART
1067 default 0xfe800000 if ARCH_IOP32X
1068 default 0xffc02000 if DEBUG_SOCFPGA_UART
1069 default 0xffd82340 if ARCH_IOP13XX
1070 default 0xfff36000 if DEBUG_HIGHBANK_UART
1071 default 0xfffff700 if ARCH_IOP33X
1072 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1073 DEBUG_LL_UART_EFM32 || \
1074 DEBUG_UART_8250 || DEBUG_UART_PL01X
1076 config DEBUG_UART_VIRT
1077 hex "Virtual base address of debug UART"
1078 default 0xe0010fe0 if ARCH_RPC
1079 default 0xf0000be0 if ARCH_EBSA110
1080 default 0xf0009000 if DEBUG_CNS3XXX
1081 default 0xf01fb000 if DEBUG_NOMADIK_UART
1082 default 0xf0201000 if DEBUG_BCM2835
1083 default 0xf11f1000 if ARCH_VERSATILE
1084 default 0xf1600000 if ARCH_INTEGRATOR
1085 default 0xf1c28000 if DEBUG_SUNXI_UART0
1086 default 0xf1c28400 if DEBUG_SUNXI_UART1
1087 default 0xf2100000 if DEBUG_PXA_UART1
1088 default 0xf4090000 if ARCH_LPC32XX
1089 default 0xf4200000 if ARCH_GEMINI
1090 default 0xf7fc9000 if DEBUG_BERLIN_UART
1091 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
1092 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
1093 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
1094 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
1095 default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1096 default 0xfd000000 if ARCH_SPEAR13XX
1097 default 0xfd012000 if ARCH_MV78XX0
1098 default 0xfde12000 if ARCH_DOVE
1099 default 0xfe012000 if ARCH_ORION5X
1100 default 0xfe017000 if DEBUG_MMP_UART2
1101 default 0xfe018000 if DEBUG_MMP_UART3
1102 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
1103 default 0xfe230000 if DEBUG_PICOXCELL_UART
1104 default 0xfe300000 if DEBUG_BCM_KONA_UART
1105 default 0xfe800000 if ARCH_IOP32X
1106 default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HI3716_UART
1107 default 0xfeb24000 if DEBUG_RK3X_UART0
1108 default 0xfeb26000 if DEBUG_RK3X_UART1
1109 default 0xfeb30c00 if DEBUG_KEYSTONE_UART0
1110 default 0xfeb31000 if DEBUG_KEYSTONE_UART1
1111 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
1112 default 0xfed60000 if DEBUG_RK29_UART0
1113 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1114 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1115 default 0xfec02000 if DEBUG_SOCFPGA_UART
1116 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0
1117 default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1
1118 default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2
1119 default 0xfed12000 if ARCH_KIRKWOOD
1120 default 0xfedc0000 if ARCH_EP93XX
1121 default 0xfee003f8 if FOOTBRIDGE
1122 default 0xfee08300 if DEBUG_DAVINCI_TNETV107X_UART1
1123 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1124 default 0xfef36000 if DEBUG_HIGHBANK_UART
1125 default 0xfee82340 if ARCH_IOP13XX
1126 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1127 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1128 default 0xfefff700 if ARCH_IOP33X
1129 default 0xff003000 if DEBUG_U300_UART
1130 default DEBUG_UART_PHYS if !MMU
1131 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1132 DEBUG_UART_8250 || DEBUG_UART_PL01X
1134 config DEBUG_UART_8250_SHIFT
1135 int "Register offset shift for the 8250 debug UART"
1136 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1137 default 0 if FOOTBRIDGE || ARCH_IOP32X
1140 config DEBUG_UART_8250_WORD
1141 bool "Use 32-bit accesses for 8250 UART"
1142 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1143 depends on DEBUG_UART_8250_SHIFT >= 2
1144 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
1146 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
1147 DEBUG_DAVINCI_DA8XX_UART2 || DEBUG_DAVINCI_TNETV107X_UART1 || \
1150 config DEBUG_UART_8250_FLOW_CONTROL
1151 bool "Enable flow control for 8250 UART"
1152 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1153 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
1155 config DEBUG_UNCOMPRESS
1157 depends on ARCH_MULTIPLATFORM || ARCH_MSM
1158 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
1159 (!DEBUG_TEGRA_UART || !ZBOOT_ROM)
1161 This option influences the normal decompressor output for
1162 multiplatform kernels. Normally, multiplatform kernels disable
1163 decompressor output because it is not possible to know where to
1164 send the decompressor output.
1166 When this option is set, the selected DEBUG_LL output method
1167 will be re-used for normal decompressor output on multiplatform
1171 config UNCOMPRESS_INCLUDE
1173 default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM
1174 default "mach/uncompress.h"
1180 Say Y here if you want to have an early console using the
1181 kernel low-level debugging functions. Add earlyprintk to your
1182 kernel parameters to enable this console.
1185 bool "On-chip ETM and ETB"
1188 Enables the on-chip embedded trace macrocell and embedded trace
1189 buffer driver that will allow you to collect traces of the
1192 config ARM_KPROBES_TEST
1193 tristate "Kprobes test module"
1194 depends on KPROBES && MODULES
1196 Perform tests of kprobes API and instruction set simulation.
1198 config PID_IN_CONTEXTIDR
1199 bool "Write the current PID to the CONTEXTIDR register"
1200 depends on CPU_COPY_V6
1202 Enabling this option causes the kernel to write the current PID to
1203 the PROCID field of the CONTEXTIDR register, at the expense of some
1204 additional instructions during context switch. Say Y here only if you
1205 are planning to use hardware trace tools with this kernel.
1207 config DEBUG_SET_MODULE_RONX
1208 bool "Set loadable kernel module data as NX and text as RO"
1211 This option helps catch unintended modifications to loadable
1212 kernel module's text and read-only data. It also prevents execution
1213 of module data. Such protection may interfere with run-time code
1214 patching and dynamic kernel tracing - and they might also protect
1215 against certain classes of kernel exploits.
1216 If in doubt, say "N".