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_UART
353 bool "Kernel low-level debugging messages via MSM UART"
356 Say Y here if you want the debug print routines to direct
357 their output to the serial port on MSM devices.
359 ARCH DEBUG_UART_PHYS DEBUG_UART_BASE #
360 MSM7X00A, QSD8X50 0xa9a00000 0xe1000000 UART1
361 MSM7X00A, QSD8X50 0xa9b00000 0xe1000000 UART2
362 MSM7X00A, QSD8X50 0xa9c00000 0xe1000000 UART3
364 MSM7X30 0xaca00000 0xe1000000 UART1
365 MSM7X30 0xacb00000 0xe1000000 UART2
366 MSM7X30 0xacc00000 0xe1000000 UART3
368 Please adjust DEBUG_UART_PHYS and DEBUG_UART_BASE configuration
369 options based on your needs.
371 config DEBUG_QCOM_UARTDM
372 bool "Kernel low-level debugging messages via QCOM UARTDM"
375 Say Y here if you want the debug print routines to direct
376 their output to the serial port on Qualcomm devices.
378 ARCH DEBUG_UART_PHYS DEBUG_UART_BASE
379 MSM8X60 0x19c40000 0xf0040000
380 MSM8960 0x16440000 0xf0040000
381 MSM8974 0xf991e000 0xfa71e000
383 Please adjust DEBUG_UART_PHYS and DEBUG_UART_BASE configuration
384 options based on your needs.
386 config DEBUG_MVEBU_UART
387 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
388 depends on ARCH_MVEBU
389 select DEBUG_UART_8250
391 Say Y here if you want kernel low-level debugging support
392 on MVEBU based platforms.
394 This option should be used with the old bootloaders
395 that left the internal registers mapped at
396 0xd0000000. As of today, this is the case on
397 platforms such as the Globalscale Mirabox or the
398 Plathome OpenBlocks AX3, when using the original
401 If the wrong DEBUG_MVEBU_UART* option is selected,
402 when u-boot hands over to the kernel, the system
403 silently crashes, with no serial output at all.
405 config DEBUG_MVEBU_UART_ALTERNATE
406 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
407 depends on ARCH_MVEBU
408 select DEBUG_UART_8250
410 Say Y here if you want kernel low-level debugging support
411 on MVEBU based platforms.
413 This option should be used with the new bootloaders
414 that remap the internal registers at 0xf1000000.
416 If the wrong DEBUG_MVEBU_UART* option is selected,
417 when u-boot hands over to the kernel, the system
418 silently crashes, with no serial output at all.
424 Say Y here if you want kernel low-level debugging support
425 on Vybrid based platforms.
427 config DEBUG_NOMADIK_UART
428 bool "Kernel low-level debugging messages via NOMADIK UART"
429 depends on ARCH_NOMADIK
430 select DEBUG_UART_PL01X
432 Say Y here if you want kernel low-level debugging support
433 on NOMADIK based platforms.
435 config DEBUG_NSPIRE_CLASSIC_UART
436 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
437 depends on ARCH_NSPIRE
438 select DEBUG_UART_8250
440 Say Y here if you want kernel low-level debugging support
441 on TI-NSPIRE classic models.
443 config DEBUG_NSPIRE_CX_UART
444 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
445 depends on ARCH_NSPIRE
446 select DEBUG_UART_PL01X
448 Say Y here if you want kernel low-level debugging support
449 on TI-NSPIRE CX models.
451 config DEBUG_OMAP2UART1
452 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
453 depends on ARCH_OMAP2PLUS
454 select DEBUG_OMAP2PLUS_UART
456 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
457 omap3 torpedo and 3530 lv som.
459 config DEBUG_OMAP2UART2
460 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
461 depends on ARCH_OMAP2PLUS
462 select DEBUG_OMAP2PLUS_UART
464 config DEBUG_OMAP2UART3
465 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
466 depends on ARCH_OMAP2PLUS
467 select DEBUG_OMAP2PLUS_UART
469 config DEBUG_OMAP3UART3
470 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
471 depends on ARCH_OMAP2PLUS
472 select DEBUG_OMAP2PLUS_UART
474 This covers at least cm_t3x, beagle, crane, devkit8000,
475 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
478 config DEBUG_OMAP4UART3
479 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
480 depends on ARCH_OMAP2PLUS
481 select DEBUG_OMAP2PLUS_UART
483 config DEBUG_OMAP3UART4
484 bool "Kernel low-level debugging messages via OMAP36XX UART4"
485 depends on ARCH_OMAP2PLUS
486 select DEBUG_OMAP2PLUS_UART
488 config DEBUG_OMAP4UART4
489 bool "Kernel low-level debugging messages via OMAP4/5 UART4"
490 depends on ARCH_OMAP2PLUS
491 select DEBUG_OMAP2PLUS_UART
493 config DEBUG_TI81XXUART1
494 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
495 depends on ARCH_OMAP2PLUS
496 select DEBUG_OMAP2PLUS_UART
498 config DEBUG_TI81XXUART2
499 bool "Kernel low-level debugging messages via TI81XX UART2"
500 depends on ARCH_OMAP2PLUS
501 select DEBUG_OMAP2PLUS_UART
503 config DEBUG_TI81XXUART3
504 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
505 depends on ARCH_OMAP2PLUS
506 select DEBUG_OMAP2PLUS_UART
508 config DEBUG_AM33XXUART1
509 bool "Kernel low-level debugging messages via AM33XX UART1"
510 depends on ARCH_OMAP2PLUS
511 select DEBUG_OMAP2PLUS_UART
513 config DEBUG_ZOOM_UART
514 bool "Kernel low-level debugging messages via Zoom2/3 UART"
515 depends on ARCH_OMAP2PLUS
516 select DEBUG_OMAP2PLUS_UART
518 config DEBUG_PICOXCELL_UART
519 depends on ARCH_PICOXCELL
520 bool "Use PicoXcell UART for low-level debug"
521 select DEBUG_UART_8250
523 Say Y here if you want kernel low-level debugging support
524 on PicoXcell based platforms.
526 config DEBUG_PXA_UART1
528 bool "Use PXA UART1 for low-level debug"
529 select DEBUG_UART_8250
531 Say Y here if you want kernel low-level debugging support
534 config DEBUG_REALVIEW_STD_PORT
535 bool "RealView Default UART"
536 depends on ARCH_REALVIEW
537 select DEBUG_UART_PL01X
539 Say Y here if you want the debug print routines to direct
540 their output to the serial port on RealView EB, PB11MP, PBA8
543 config DEBUG_REALVIEW_PB1176_PORT
544 bool "RealView PB1176 UART"
545 depends on MACH_REALVIEW_PB1176
546 select DEBUG_UART_PL01X
548 Say Y here if you want the debug print routines to direct
549 their output to the standard serial port on the RealView
552 config DEBUG_RK29_UART0
553 bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
554 depends on ARCH_ROCKCHIP
555 select DEBUG_UART_8250
557 Say Y here if you want kernel low-level debugging support
558 on Rockchip based platforms.
560 config DEBUG_RK29_UART1
561 bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
562 depends on ARCH_ROCKCHIP
563 select DEBUG_UART_8250
565 Say Y here if you want kernel low-level debugging support
566 on Rockchip based platforms.
568 config DEBUG_RK29_UART2
569 bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
570 depends on ARCH_ROCKCHIP
571 select DEBUG_UART_8250
573 Say Y here if you want kernel low-level debugging support
574 on Rockchip based platforms.
576 config DEBUG_RK3X_UART0
577 bool "Kernel low-level debugging messages via Rockchip RK3X UART0"
578 depends on ARCH_ROCKCHIP
579 select DEBUG_UART_8250
581 Say Y here if you want kernel low-level debugging support
582 on Rockchip based platforms.
584 config DEBUG_RK3X_UART1
585 bool "Kernel low-level debugging messages via Rockchip RK3X UART1"
586 depends on ARCH_ROCKCHIP
587 select DEBUG_UART_8250
589 Say Y here if you want kernel low-level debugging support
590 on Rockchip based platforms.
592 config DEBUG_RK3X_UART2
593 bool "Kernel low-level debugging messages via Rockchip RK3X UART2"
594 depends on ARCH_ROCKCHIP
595 select DEBUG_UART_8250
597 Say Y here if you want kernel low-level debugging support
598 on Rockchip based platforms.
600 config DEBUG_RK3X_UART3
601 bool "Kernel low-level debugging messages via Rockchip RK3X UART3"
602 depends on ARCH_ROCKCHIP
603 select DEBUG_UART_8250
605 Say Y here if you want kernel low-level debugging support
606 on Rockchip based platforms.
608 config DEBUG_S3C_UART0
609 depends on PLAT_SAMSUNG
610 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
611 bool "Use S3C UART 0 for low-level debug"
613 Say Y here if you want the debug print routines to direct
614 their output to UART 0. The port must have been initialised
615 by the boot-loader before use.
617 The uncompressor code port configuration is now handled
618 by CONFIG_S3C_LOWLEVEL_UART_PORT.
620 config DEBUG_S3C_UART1
621 depends on PLAT_SAMSUNG
622 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
623 bool "Use S3C UART 1 for low-level debug"
625 Say Y here if you want the debug print routines to direct
626 their output to UART 1. The port must have been initialised
627 by the boot-loader before use.
629 The uncompressor code port configuration is now handled
630 by CONFIG_S3C_LOWLEVEL_UART_PORT.
632 config DEBUG_S3C_UART2
633 depends on PLAT_SAMSUNG
634 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
635 bool "Use S3C UART 2 for low-level debug"
637 Say Y here if you want the debug print routines to direct
638 their output to UART 2. The port must have been initialised
639 by the boot-loader before use.
641 The uncompressor code port configuration is now handled
642 by CONFIG_S3C_LOWLEVEL_UART_PORT.
644 config DEBUG_S3C_UART3
645 depends on PLAT_SAMSUNG && ARCH_EXYNOS
646 select DEBUG_EXYNOS_UART
647 bool "Use S3C UART 3 for low-level debug"
649 Say Y here if you want the debug print routines to direct
650 their output to UART 3. The port must have been initialised
651 by the boot-loader before use.
653 The uncompressor code port configuration is now handled
654 by CONFIG_S3C_LOWLEVEL_UART_PORT.
656 config DEBUG_SOCFPGA_UART
657 depends on ARCH_SOCFPGA
658 bool "Use SOCFPGA UART for low-level debug"
659 select DEBUG_UART_8250
661 Say Y here if you want kernel low-level debugging support
662 on SOCFPGA based platforms.
664 config DEBUG_SUNXI_UART0
665 bool "Kernel low-level debugging messages via sunXi UART0"
666 depends on ARCH_SUNXI
667 select DEBUG_UART_8250
669 Say Y here if you want kernel low-level debugging support
670 on Allwinner A1X based platforms on the UART0.
672 config DEBUG_SUNXI_UART1
673 bool "Kernel low-level debugging messages via sunXi UART1"
674 depends on ARCH_SUNXI
675 select DEBUG_UART_8250
677 Say Y here if you want kernel low-level debugging support
678 on Allwinner A1X based platforms on the UART1.
680 config TEGRA_DEBUG_UART_AUTO_ODMDATA
681 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
682 depends on ARCH_TEGRA
683 select DEBUG_TEGRA_UART
685 Automatically determines which UART to use for low-level
686 debug based on the ODMDATA value. This value is part of
687 the BCT, and is written to the boot memory device using
688 nvflash, or other flashing tool. When bits 19:18 are 3,
689 then bits 17:15 indicate which UART to use; 0/1/2/3/4
692 config TEGRA_DEBUG_UARTA
693 bool "Kernel low-level debugging messages via Tegra UART A"
694 depends on ARCH_TEGRA
695 select DEBUG_TEGRA_UART
697 Say Y here if you want kernel low-level debugging support
698 on Tegra based platforms.
700 config TEGRA_DEBUG_UARTB
701 bool "Kernel low-level debugging messages via Tegra UART B"
702 depends on ARCH_TEGRA
703 select DEBUG_TEGRA_UART
705 Say Y here if you want kernel low-level debugging support
706 on Tegra based platforms.
708 config TEGRA_DEBUG_UARTC
709 bool "Kernel low-level debugging messages via Tegra UART C"
710 depends on ARCH_TEGRA
711 select DEBUG_TEGRA_UART
713 Say Y here if you want kernel low-level debugging support
714 on Tegra based platforms.
716 config TEGRA_DEBUG_UARTD
717 bool "Kernel low-level debugging messages via Tegra UART D"
718 depends on ARCH_TEGRA
719 select DEBUG_TEGRA_UART
721 Say Y here if you want kernel low-level debugging support
722 on Tegra based platforms.
724 config TEGRA_DEBUG_UARTE
725 bool "Kernel low-level debugging messages via Tegra UART E"
726 depends on ARCH_TEGRA
727 select DEBUG_TEGRA_UART
729 Say Y here if you want kernel low-level debugging support
730 on Tegra based platforms.
732 config DEBUG_SIRFPRIMA2_UART1
733 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
734 depends on ARCH_PRIMA2
736 Say Y here if you want the debug print routines to direct
737 their output to the uart1 port on SiRFprimaII devices.
739 config DEBUG_SIRFMARCO_UART1
740 bool "Kernel low-level debugging messages via SiRFmarco UART1"
741 depends on ARCH_MARCO
743 Say Y here if you want the debug print routines to direct
744 their output to the uart1 port on SiRFmarco devices.
746 config STIH41X_DEBUG_ASC2
747 bool "Use StiH415/416 ASC2 UART for low-level debug"
749 select DEBUG_STI_UART
751 Say Y here if you want kernel low-level debugging support
752 on STiH415/416 based platforms like b2000, which has
753 default UART wired up to ASC2.
757 config STIH41X_DEBUG_SBC_ASC1
758 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
760 select DEBUG_STI_UART
762 Say Y here if you want kernel low-level debugging support
763 on STiH415/416 based platforms like b2020. which has
764 default UART wired up to SBC ASC1.
768 config DEBUG_U300_UART
769 bool "Kernel low-level debugging messages via U300 UART0"
771 select DEBUG_UART_PL01X
773 Say Y here if you want the debug print routines to direct
774 their output to the uart port on U300 devices.
776 config DEBUG_UX500_UART
777 depends on ARCH_U8500
778 bool "Use Ux500 UART for low-level debug"
780 Say Y here if you want kernel low-level debugging support
781 on Ux500 based platforms.
783 config DEBUG_VEXPRESS_UART0_DETECT
784 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
785 depends on ARCH_VEXPRESS && CPU_CP15_MMU
787 This option enables a simple heuristic which tries to determine
788 the motherboard's memory map variant (original or RS1) and then
789 choose the relevant UART0 base address.
791 Note that this will only work with standard A-class core tiles,
792 and may fail with non-standard SMM or custom software models.
794 config DEBUG_VEXPRESS_UART0_CA9
795 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
796 depends on ARCH_VEXPRESS
797 select DEBUG_UART_PL01X
799 This option selects UART0 at 0x10009000. Except for custom models,
800 this applies only to the V2P-CA9 tile.
802 config DEBUG_VEXPRESS_UART0_RS1
803 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
804 depends on ARCH_VEXPRESS
805 select DEBUG_UART_PL01X
807 This option selects UART0 at 0x1c090000. This applies to most
808 of the tiles using the RS1 memory map, including all new A-class
809 core tiles, FPGA-based SMMs and software models.
811 config DEBUG_VEXPRESS_UART0_CRX
812 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
813 depends on ARCH_VEXPRESS && !MMU
814 select DEBUG_UART_PL01X
816 This option selects UART0 at 0xb0090000. This is appropriate for
817 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
819 config DEBUG_VT8500_UART0
820 bool "Use UART0 on VIA/Wondermedia SoCs"
821 depends on ARCH_VT8500
823 This option selects UART0 on VIA/Wondermedia System-on-a-chip
824 devices, including VT8500, WM8505, WM8650 and WM8850.
826 config DEBUG_LL_UART_NONE
827 bool "No low-level debugging UART"
828 depends on !ARCH_MULTIPLATFORM
830 Say Y here if your platform doesn't provide a UART option
831 above. This relies on your platform choosing the right UART
832 definition internally in order for low-level debugging to
836 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
838 Say Y here if you want the debug print routines to direct
839 their output to the EmbeddedICE macrocell's DCC channel using
840 co-processor 14. This is known to work on the ARM9 style ICE
841 channel and on the XScale with the PEEDI.
843 Note that the system will appear to hang during boot if there
844 is nothing connected to read from the DCC.
846 config DEBUG_SEMIHOSTING
847 bool "Kernel low-level debug output via semihosting I/O"
849 Semihosting enables code running on an ARM target to use
850 the I/O facilities on a host debugger/emulator through a
851 simple SVC call. The host debugger or emulator must have
852 semihosting enabled for the special svc call to be trapped
853 otherwise the kernel will crash.
855 This is known to work with OpenOCD, as well as
856 ARM's Fast Models, or any other controlling environment
857 that implements semihosting.
859 For more details about semihosting, please see
860 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
862 config DEBUG_LL_UART_8250
863 bool "Kernel low-level debugging via 8250 UART"
865 Say Y here if you wish the debug print routes to direct
866 their output to an 8250 UART. You can use this option
867 to provide the parameters for the 8250 UART rather than
868 selecting one of the platform specific options above if
869 you know the parameters for the port.
871 This option is preferred over the platform specific
872 options; the platform specific options are deprecated
873 and will be soon removed.
875 config DEBUG_LL_UART_EFM32
876 bool "Kernel low-level debugging via efm32 UART"
877 depends on ARCH_EFM32
879 Say Y here if you want the debug print routines to direct
880 their output to an UART or USART port on efm32 based
881 machines. Use the following addresses for DEBUG_UART_PHYS:
889 config DEBUG_LL_UART_PL01X
890 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
892 Say Y here if you wish the debug print routes to direct
893 their output to a PL01x Primecell UART. You can use
894 this option to provide the parameters for the UART
895 rather than selecting one of the platform specific
896 options above if you know the parameters for the port.
898 This option is preferred over the platform specific
899 options; the platform specific options are deprecated
900 and will be soon removed.
904 config DEBUG_EXYNOS_UART
907 config DEBUG_OMAP2PLUS_UART
909 depends on ARCH_OMAP2PLUS
911 config DEBUG_IMX_UART_PORT
912 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
913 DEBUG_IMX25_UART || \
914 DEBUG_IMX21_IMX27_UART || \
915 DEBUG_IMX31_UART || \
916 DEBUG_IMX35_UART || \
917 DEBUG_IMX50_UART || \
918 DEBUG_IMX51_UART || \
919 DEBUG_IMX53_UART || \
920 DEBUG_IMX6Q_UART || \
925 Choose UART port on which kernel low-level debug messages
928 config DEBUG_TEGRA_UART
930 depends on ARCH_TEGRA
932 config DEBUG_STI_UART
936 config DEBUG_LL_INCLUDE
938 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
939 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
940 default "debug/exynos.S" if DEBUG_EXYNOS_UART
941 default "debug/efm32.S" if DEBUG_LL_UART_EFM32
942 default "debug/icedcc.S" if DEBUG_ICEDCC
943 default "debug/imx.S" if DEBUG_IMX1_UART || \
944 DEBUG_IMX25_UART || \
945 DEBUG_IMX21_IMX27_UART || \
946 DEBUG_IMX31_UART || \
947 DEBUG_IMX35_UART || \
948 DEBUG_IMX50_UART || \
949 DEBUG_IMX51_UART || \
951 DEBUG_IMX6Q_UART || \
953 default "debug/msm.S" if DEBUG_MSM_UART || DEBUG_QCOM_UARTDM
954 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
955 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
956 default "debug/sti.S" if DEBUG_STI_UART
957 default "debug/tegra.S" if DEBUG_TEGRA_UART
958 default "debug/ux500.S" if DEBUG_UX500_UART
959 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
960 default "debug/vf.S" if DEBUG_VF_UART
961 default "debug/vt8500.S" if DEBUG_VT8500_UART0
962 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
963 default "mach/debug-macro.S"
965 # Compatibility options for PL01x
966 config DEBUG_UART_PL01X
967 def_bool ARCH_EP93XX || \
974 # Compatibility options for 8250
975 config DEBUG_UART_8250
976 def_bool ARCH_DOVE || ARCH_EBSA110 || \
977 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
978 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
979 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \
980 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
982 config DEBUG_UART_PHYS
983 hex "Physical base address of debug UART"
984 default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0
985 default 0x01c28000 if DEBUG_SUNXI_UART0
986 default 0x01c28400 if DEBUG_SUNXI_UART1
987 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1
988 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2
989 default 0x02530c00 if DEBUG_KEYSTONE_UART0
990 default 0x02531000 if DEBUG_KEYSTONE_UART1
991 default 0x03010fe0 if ARCH_RPC
992 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
993 DEBUG_VEXPRESS_UART0_CA9
994 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
995 default 0x10124000 if DEBUG_RK3X_UART0
996 default 0x10126000 if DEBUG_RK3X_UART1
997 default 0x101f1000 if ARCH_VERSATILE
998 default 0x101fb000 if DEBUG_NOMADIK_UART
999 default 0x16000000 if ARCH_INTEGRATOR
1000 default 0x18000300 if DEBUG_BCM_5301X
1001 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
1002 default 0x20060000 if DEBUG_RK29_UART0
1003 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1004 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1005 default 0x20201000 if DEBUG_BCM2835
1006 default 0x3e000000 if DEBUG_BCM_KONA_UART
1007 default 0x4000e400 if DEBUG_LL_UART_EFM32
1008 default 0x40090000 if ARCH_LPC32XX
1009 default 0x40100000 if DEBUG_PXA_UART1
1010 default 0x42000000 if ARCH_GEMINI
1011 default 0x7c0003f8 if FOOTBRIDGE
1012 default 0x80230000 if DEBUG_PICOXCELL_UART
1013 default 0x80070000 if DEBUG_IMX23_UART
1014 default 0x80074000 if DEBUG_IMX28_UART
1015 default 0x808c0000 if ARCH_EP93XX
1016 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1017 default 0xa9a00000 if DEBUG_MSM_UART
1018 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
1019 default 0xc0013000 if DEBUG_U300_UART
1020 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1021 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1022 default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1023 default 0xd0012000 if DEBUG_MVEBU_UART
1024 default 0xd4017000 if DEBUG_MMP_UART2
1025 default 0xd4018000 if DEBUG_MMP_UART3
1026 default 0xe0000000 if ARCH_SPEAR13XX
1027 default 0xf0000be0 if ARCH_EBSA110
1028 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
1029 default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
1031 default 0xf7fc9000 if DEBUG_BERLIN_UART
1032 default 0xf8b00000 if DEBUG_HI3716_UART
1033 default 0xf991e000 if DEBUG_QCOM_UARTDM
1034 default 0xfcb00000 if DEBUG_HI3620_UART
1035 default 0xfe800000 if ARCH_IOP32X
1036 default 0xffc02000 if DEBUG_SOCFPGA_UART
1037 default 0xffd82340 if ARCH_IOP13XX
1038 default 0xfff36000 if DEBUG_HIGHBANK_UART
1039 default 0xfffff700 if ARCH_IOP33X
1040 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1041 DEBUG_LL_UART_EFM32 || \
1042 DEBUG_UART_8250 || DEBUG_UART_PL01X || \
1043 DEBUG_MSM_UART || DEBUG_QCOM_UARTDM
1045 config DEBUG_UART_VIRT
1046 hex "Virtual base address of debug UART"
1047 default 0xe0010fe0 if ARCH_RPC
1048 default 0xe1000000 if DEBUG_MSM_UART
1049 default 0xf0000be0 if ARCH_EBSA110
1050 default 0xf0009000 if DEBUG_CNS3XXX
1051 default 0xf01fb000 if DEBUG_NOMADIK_UART
1052 default 0xf0201000 if DEBUG_BCM2835
1053 default 0xf1000300 if DEBUG_BCM_5301X
1054 default 0xf11f1000 if ARCH_VERSATILE
1055 default 0xf1600000 if ARCH_INTEGRATOR
1056 default 0xf1c28000 if DEBUG_SUNXI_UART0
1057 default 0xf1c28400 if DEBUG_SUNXI_UART1
1058 default 0xf2100000 if DEBUG_PXA_UART1
1059 default 0xf4090000 if ARCH_LPC32XX
1060 default 0xf4200000 if ARCH_GEMINI
1061 default 0xf7fc9000 if DEBUG_BERLIN_UART
1062 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
1063 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
1064 default 0xfa71e000 if DEBUG_QCOM_UARTDM
1065 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
1066 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
1067 default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1068 default 0xfd000000 if ARCH_SPEAR13XX
1069 default 0xfd012000 if ARCH_MV78XX0
1070 default 0xfde12000 if ARCH_DOVE
1071 default 0xfe012000 if ARCH_ORION5X
1072 default 0xfe017000 if DEBUG_MMP_UART2
1073 default 0xfe018000 if DEBUG_MMP_UART3
1074 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
1075 default 0xfe230000 if DEBUG_PICOXCELL_UART
1076 default 0xfe300000 if DEBUG_BCM_KONA_UART
1077 default 0xfe800000 if ARCH_IOP32X
1078 default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HI3716_UART
1079 default 0xfeb24000 if DEBUG_RK3X_UART0
1080 default 0xfeb26000 if DEBUG_RK3X_UART1
1081 default 0xfeb30c00 if DEBUG_KEYSTONE_UART0
1082 default 0xfeb31000 if DEBUG_KEYSTONE_UART1
1083 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
1084 default 0xfed60000 if DEBUG_RK29_UART0
1085 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1086 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1087 default 0xfec02000 if DEBUG_SOCFPGA_UART
1088 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0
1089 default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1
1090 default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2
1091 default 0xfed12000 if ARCH_KIRKWOOD
1092 default 0xfedc0000 if ARCH_EP93XX
1093 default 0xfee003f8 if FOOTBRIDGE
1094 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1095 default 0xfef36000 if DEBUG_HIGHBANK_UART
1096 default 0xfee82340 if ARCH_IOP13XX
1097 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1098 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1099 default 0xfefff700 if ARCH_IOP33X
1100 default 0xff003000 if DEBUG_U300_UART
1101 default DEBUG_UART_PHYS if !MMU
1102 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1103 DEBUG_UART_8250 || DEBUG_UART_PL01X || \
1104 DEBUG_MSM_UART || DEBUG_QCOM_UARTDM
1106 config DEBUG_UART_8250_SHIFT
1107 int "Register offset shift for the 8250 debug UART"
1108 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1109 default 0 if FOOTBRIDGE || ARCH_IOP32X
1112 config DEBUG_UART_8250_WORD
1113 bool "Use 32-bit accesses for 8250 UART"
1114 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1115 depends on DEBUG_UART_8250_SHIFT >= 2
1116 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
1118 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
1119 DEBUG_DAVINCI_DA8XX_UART2 || \
1122 config DEBUG_UART_8250_FLOW_CONTROL
1123 bool "Enable flow control for 8250 UART"
1124 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1125 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
1127 config DEBUG_UNCOMPRESS
1129 depends on ARCH_MULTIPLATFORM || ARCH_MSM || PLAT_SAMSUNG
1130 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
1131 (!DEBUG_TEGRA_UART || !ZBOOT_ROM)
1133 This option influences the normal decompressor output for
1134 multiplatform kernels. Normally, multiplatform kernels disable
1135 decompressor output because it is not possible to know where to
1136 send the decompressor output.
1138 When this option is set, the selected DEBUG_LL output method
1139 will be re-used for normal decompressor output on multiplatform
1143 config UNCOMPRESS_INCLUDE
1145 default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM || \
1146 PLAT_SAMSUNG || ARCH_EFM32
1147 default "mach/uncompress.h"
1153 Say Y here if you want to have an early console using the
1154 kernel low-level debugging functions. Add earlyprintk to your
1155 kernel parameters to enable this console.
1158 bool "On-chip ETM and ETB"
1161 Enables the on-chip embedded trace macrocell and embedded trace
1162 buffer driver that will allow you to collect traces of the
1165 config ARM_KPROBES_TEST
1166 tristate "Kprobes test module"
1167 depends on KPROBES && MODULES
1169 Perform tests of kprobes API and instruction set simulation.
1171 config PID_IN_CONTEXTIDR
1172 bool "Write the current PID to the CONTEXTIDR register"
1173 depends on CPU_COPY_V6
1175 Enabling this option causes the kernel to write the current PID to
1176 the PROCID field of the CONTEXTIDR register, at the expense of some
1177 additional instructions during context switch. Say Y here only if you
1178 are planning to use hardware trace tools with this kernel.
1180 config DEBUG_SET_MODULE_RONX
1181 bool "Set loadable kernel module data as NX and text as RO"
1184 This option helps catch unintended modifications to loadable
1185 kernel module's text and read-only data. It also prevents execution
1186 of module data. Such protection may interfere with run-time code
1187 patching and dynamic kernel tracing - and they might also protect
1188 against certain classes of kernel exploits.
1189 If in doubt, say "N".