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 select DEBUG_S3C24XX_UART if ARCH_S3C24XX
629 bool "Use S3C UART 0 for low-level debug"
631 Say Y here if you want the debug print routines to direct
632 their output to UART 0. The port must have been initialised
633 by the boot-loader before use.
635 The uncompressor code port configuration is now handled
636 by CONFIG_S3C_LOWLEVEL_UART_PORT.
638 config DEBUG_S3C_UART1
639 depends on PLAT_SAMSUNG
640 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
641 select DEBUG_S3C24XX_UART if ARCH_S3C24XX
642 bool "Use S3C UART 1 for low-level debug"
644 Say Y here if you want the debug print routines to direct
645 their output to UART 1. The port must have been initialised
646 by the boot-loader before use.
648 The uncompressor code port configuration is now handled
649 by CONFIG_S3C_LOWLEVEL_UART_PORT.
651 config DEBUG_S3C_UART2
652 depends on PLAT_SAMSUNG
653 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
654 select DEBUG_S3C24XX_UART if ARCH_S3C24XX
655 bool "Use S3C UART 2 for low-level debug"
657 Say Y here if you want the debug print routines to direct
658 their output to UART 2. The port must have been initialised
659 by the boot-loader before use.
661 The uncompressor code port configuration is now handled
662 by CONFIG_S3C_LOWLEVEL_UART_PORT.
664 config DEBUG_S3C_UART3
665 depends on PLAT_SAMSUNG && ARCH_EXYNOS
666 select DEBUG_EXYNOS_UART
667 bool "Use S3C UART 3 for low-level debug"
669 Say Y here if you want the debug print routines to direct
670 their output to UART 3. The port must have been initialised
671 by the boot-loader before use.
673 The uncompressor code port configuration is now handled
674 by CONFIG_S3C_LOWLEVEL_UART_PORT.
676 config DEBUG_S3C2410_UART0
677 depends on ARCH_S3C24XX
678 select DEBUG_S3C2410_UART
679 bool "Use S3C2410/S3C2412 UART 0 for low-level debug"
681 Say Y here if you want the debug print routines to direct
682 their output to UART 0. The port must have been initialised
683 by the boot-loader before use.
685 config DEBUG_S3C2410_UART1
686 depends on ARCH_S3C24XX
687 select DEBUG_S3C2410_UART
688 bool "Use S3C2410/S3C2412 UART 1 for low-level debug"
690 Say Y here if you want the debug print routines to direct
691 their output to UART 1. The port must have been initialised
692 by the boot-loader before use.
694 config DEBUG_S3C2410_UART2
695 depends on ARCH_S3C24XX
696 select DEBUG_S3C2410_UART
697 bool "Use S3C2410/S3C2412 UART 2 for low-level debug"
699 Say Y here if you want the debug print routines to direct
700 their output to UART 2. The port must have been initialised
701 by the boot-loader before use.
703 config DEBUG_SOCFPGA_UART
704 depends on ARCH_SOCFPGA
705 bool "Use SOCFPGA UART for low-level debug"
706 select DEBUG_UART_8250
708 Say Y here if you want kernel low-level debugging support
709 on SOCFPGA based platforms.
711 config DEBUG_SUNXI_UART0
712 bool "Kernel low-level debugging messages via sunXi UART0"
713 depends on ARCH_SUNXI
714 select DEBUG_UART_8250
716 Say Y here if you want kernel low-level debugging support
717 on Allwinner A1X based platforms on the UART0.
719 config DEBUG_SUNXI_UART1
720 bool "Kernel low-level debugging messages via sunXi UART1"
721 depends on ARCH_SUNXI
722 select DEBUG_UART_8250
724 Say Y here if you want kernel low-level debugging support
725 on Allwinner A1X based platforms on the UART1.
727 config TEGRA_DEBUG_UART_AUTO_ODMDATA
728 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
729 depends on ARCH_TEGRA
730 select DEBUG_TEGRA_UART
732 Automatically determines which UART to use for low-level
733 debug based on the ODMDATA value. This value is part of
734 the BCT, and is written to the boot memory device using
735 nvflash, or other flashing tool. When bits 19:18 are 3,
736 then bits 17:15 indicate which UART to use; 0/1/2/3/4
739 config TEGRA_DEBUG_UARTA
740 bool "Kernel low-level debugging messages via Tegra UART A"
741 depends on ARCH_TEGRA
742 select DEBUG_TEGRA_UART
744 Say Y here if you want kernel low-level debugging support
745 on Tegra based platforms.
747 config TEGRA_DEBUG_UARTB
748 bool "Kernel low-level debugging messages via Tegra UART B"
749 depends on ARCH_TEGRA
750 select DEBUG_TEGRA_UART
752 Say Y here if you want kernel low-level debugging support
753 on Tegra based platforms.
755 config TEGRA_DEBUG_UARTC
756 bool "Kernel low-level debugging messages via Tegra UART C"
757 depends on ARCH_TEGRA
758 select DEBUG_TEGRA_UART
760 Say Y here if you want kernel low-level debugging support
761 on Tegra based platforms.
763 config TEGRA_DEBUG_UARTD
764 bool "Kernel low-level debugging messages via Tegra UART D"
765 depends on ARCH_TEGRA
766 select DEBUG_TEGRA_UART
768 Say Y here if you want kernel low-level debugging support
769 on Tegra based platforms.
771 config TEGRA_DEBUG_UARTE
772 bool "Kernel low-level debugging messages via Tegra UART E"
773 depends on ARCH_TEGRA
774 select DEBUG_TEGRA_UART
776 Say Y here if you want kernel low-level debugging support
777 on Tegra based platforms.
779 config DEBUG_SIRFPRIMA2_UART1
780 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
781 depends on ARCH_PRIMA2
783 Say Y here if you want the debug print routines to direct
784 their output to the uart1 port on SiRFprimaII devices.
786 config DEBUG_SIRFMARCO_UART1
787 bool "Kernel low-level debugging messages via SiRFmarco UART1"
788 depends on ARCH_MARCO
790 Say Y here if you want the debug print routines to direct
791 their output to the uart1 port on SiRFmarco devices.
793 config STIH41X_DEBUG_ASC2
794 bool "Use StiH415/416 ASC2 UART for low-level debug"
796 select DEBUG_STI_UART
798 Say Y here if you want kernel low-level debugging support
799 on STiH415/416 based platforms like b2000, which has
800 default UART wired up to ASC2.
804 config STIH41X_DEBUG_SBC_ASC1
805 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
807 select DEBUG_STI_UART
809 Say Y here if you want kernel low-level debugging support
810 on STiH415/416 based platforms like b2020. which has
811 default UART wired up to SBC ASC1.
815 config DEBUG_U300_UART
816 bool "Kernel low-level debugging messages via U300 UART0"
818 select DEBUG_UART_PL01X
820 Say Y here if you want the debug print routines to direct
821 their output to the uart port on U300 devices.
823 config DEBUG_UX500_UART
824 depends on ARCH_U8500
825 bool "Use Ux500 UART for low-level debug"
827 Say Y here if you want kernel low-level debugging support
828 on Ux500 based platforms.
830 config DEBUG_VEXPRESS_UART0_DETECT
831 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
832 depends on ARCH_VEXPRESS && CPU_CP15_MMU
834 This option enables a simple heuristic which tries to determine
835 the motherboard's memory map variant (original or RS1) and then
836 choose the relevant UART0 base address.
838 Note that this will only work with standard A-class core tiles,
839 and may fail with non-standard SMM or custom software models.
841 config DEBUG_VEXPRESS_UART0_CA9
842 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
843 depends on ARCH_VEXPRESS
844 select DEBUG_UART_PL01X
846 This option selects UART0 at 0x10009000. Except for custom models,
847 this applies only to the V2P-CA9 tile.
849 config DEBUG_VEXPRESS_UART0_RS1
850 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
851 depends on ARCH_VEXPRESS
852 select DEBUG_UART_PL01X
854 This option selects UART0 at 0x1c090000. This applies to most
855 of the tiles using the RS1 memory map, including all new A-class
856 core tiles, FPGA-based SMMs and software models.
858 config DEBUG_VEXPRESS_UART0_CRX
859 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
860 depends on ARCH_VEXPRESS && !MMU
861 select DEBUG_UART_PL01X
863 This option selects UART0 at 0xb0090000. This is appropriate for
864 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
866 config DEBUG_VT8500_UART0
867 bool "Use UART0 on VIA/Wondermedia SoCs"
868 depends on ARCH_VT8500
870 This option selects UART0 on VIA/Wondermedia System-on-a-chip
871 devices, including VT8500, WM8505, WM8650 and WM8850.
873 config DEBUG_LL_UART_NONE
874 bool "No low-level debugging UART"
875 depends on !ARCH_MULTIPLATFORM
877 Say Y here if your platform doesn't provide a UART option
878 above. This relies on your platform choosing the right UART
879 definition internally in order for low-level debugging to
883 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
885 Say Y here if you want the debug print routines to direct
886 their output to the EmbeddedICE macrocell's DCC channel using
887 co-processor 14. This is known to work on the ARM9 style ICE
888 channel and on the XScale with the PEEDI.
890 Note that the system will appear to hang during boot if there
891 is nothing connected to read from the DCC.
893 config DEBUG_SEMIHOSTING
894 bool "Kernel low-level debug output via semihosting I/O"
896 Semihosting enables code running on an ARM target to use
897 the I/O facilities on a host debugger/emulator through a
898 simple SVC call. The host debugger or emulator must have
899 semihosting enabled for the special svc call to be trapped
900 otherwise the kernel will crash.
902 This is known to work with OpenOCD, as well as
903 ARM's Fast Models, or any other controlling environment
904 that implements semihosting.
906 For more details about semihosting, please see
907 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
909 config DEBUG_LL_UART_8250
910 bool "Kernel low-level debugging via 8250 UART"
912 Say Y here if you wish the debug print routes to direct
913 their output to an 8250 UART. You can use this option
914 to provide the parameters for the 8250 UART rather than
915 selecting one of the platform specific options above if
916 you know the parameters for the port.
918 This option is preferred over the platform specific
919 options; the platform specific options are deprecated
920 and will be soon removed.
922 config DEBUG_LL_UART_EFM32
923 bool "Kernel low-level debugging via efm32 UART"
924 depends on ARCH_EFM32
926 Say Y here if you want the debug print routines to direct
927 their output to an UART or USART port on efm32 based
928 machines. Use the following addresses for DEBUG_UART_PHYS:
936 config DEBUG_LL_UART_PL01X
937 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
939 Say Y here if you wish the debug print routes to direct
940 their output to a PL01x Primecell UART. You can use
941 this option to provide the parameters for the UART
942 rather than selecting one of the platform specific
943 options above if you know the parameters for the port.
945 This option is preferred over the platform specific
946 options; the platform specific options are deprecated
947 and will be soon removed.
951 config DEBUG_EXYNOS_UART
954 config DEBUG_S3C2410_UART
956 select DEBUG_S3C24XX_UART
958 config DEBUG_S3C24XX_UART
961 config DEBUG_OMAP2PLUS_UART
963 depends on ARCH_OMAP2PLUS
965 config DEBUG_IMX_UART_PORT
966 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
967 DEBUG_IMX25_UART || \
968 DEBUG_IMX21_IMX27_UART || \
969 DEBUG_IMX31_UART || \
970 DEBUG_IMX35_UART || \
971 DEBUG_IMX50_UART || \
972 DEBUG_IMX51_UART || \
973 DEBUG_IMX53_UART || \
974 DEBUG_IMX6Q_UART || \
979 Choose UART port on which kernel low-level debug messages
982 config DEBUG_TEGRA_UART
984 depends on ARCH_TEGRA
986 config DEBUG_STI_UART
990 config DEBUG_MSM_UART
992 depends on ARCH_MSM || ARCH_QCOM
994 config DEBUG_LL_INCLUDE
996 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
997 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
998 default "debug/exynos.S" if DEBUG_EXYNOS_UART
999 default "debug/efm32.S" if DEBUG_LL_UART_EFM32
1000 default "debug/icedcc.S" if DEBUG_ICEDCC
1001 default "debug/imx.S" if DEBUG_IMX1_UART || \
1002 DEBUG_IMX25_UART || \
1003 DEBUG_IMX21_IMX27_UART || \
1004 DEBUG_IMX31_UART || \
1005 DEBUG_IMX35_UART || \
1006 DEBUG_IMX50_UART || \
1007 DEBUG_IMX51_UART || \
1008 DEBUG_IMX53_UART ||\
1009 DEBUG_IMX6Q_UART || \
1011 default "debug/msm.S" if DEBUG_MSM_UART
1012 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
1013 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
1014 default "debug/sti.S" if DEBUG_STI_UART
1015 default "debug/tegra.S" if DEBUG_TEGRA_UART
1016 default "debug/ux500.S" if DEBUG_UX500_UART
1017 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
1018 default "debug/vf.S" if DEBUG_VF_UART
1019 default "debug/vt8500.S" if DEBUG_VT8500_UART0
1020 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
1021 default "mach/debug-macro.S"
1023 # Compatibility options for PL01x
1024 config DEBUG_UART_PL01X
1025 def_bool ARCH_EP93XX || \
1026 ARCH_INTEGRATOR || \
1032 # Compatibility options for 8250
1033 config DEBUG_UART_8250
1034 def_bool ARCH_DOVE || ARCH_EBSA110 || \
1035 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
1036 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
1037 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \
1038 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
1040 config DEBUG_UART_PHYS
1041 hex "Physical base address of debug UART"
1042 default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0
1043 default 0x01c28000 if DEBUG_SUNXI_UART0
1044 default 0x01c28400 if DEBUG_SUNXI_UART1
1045 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1
1046 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2
1047 default 0x02530c00 if DEBUG_KEYSTONE_UART0
1048 default 0x02531000 if DEBUG_KEYSTONE_UART1
1049 default 0x03010fe0 if ARCH_RPC
1050 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
1051 DEBUG_VEXPRESS_UART0_CA9
1052 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
1053 default 0x10124000 if DEBUG_RK3X_UART0
1054 default 0x10126000 if DEBUG_RK3X_UART1
1055 default 0x101f1000 if ARCH_VERSATILE
1056 default 0x101fb000 if DEBUG_NOMADIK_UART
1057 default 0x16000000 if ARCH_INTEGRATOR
1058 default 0x18000300 if DEBUG_BCM_5301X
1059 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
1060 default 0x20060000 if DEBUG_RK29_UART0
1061 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1062 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1063 default 0x20201000 if DEBUG_BCM2835
1064 default 0x3e000000 if DEBUG_BCM_KONA_UART
1065 default 0x4000e400 if DEBUG_LL_UART_EFM32
1066 default 0x40090000 if ARCH_LPC32XX
1067 default 0x40100000 if DEBUG_PXA_UART1
1068 default 0x42000000 if ARCH_GEMINI
1069 default 0x50000000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART0 || \
1070 DEBUG_S3C2410_UART0)
1071 default 0x50004000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART1 || \
1072 DEBUG_S3C2410_UART1)
1073 default 0x50008000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART2 || \
1074 DEBUG_S3C2410_UART2)
1075 default 0x7c0003f8 if FOOTBRIDGE
1076 default 0x80070000 if DEBUG_IMX23_UART
1077 default 0x80074000 if DEBUG_IMX28_UART
1078 default 0x80230000 if DEBUG_PICOXCELL_UART
1079 default 0x808c0000 if ARCH_EP93XX
1080 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1081 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
1082 default 0xc0013000 if DEBUG_U300_UART
1083 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1084 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1085 default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1086 default 0xd0012000 if DEBUG_MVEBU_UART
1087 default 0xd4017000 if DEBUG_MMP_UART2
1088 default 0xd4018000 if DEBUG_MMP_UART3
1089 default 0xe0000000 if ARCH_SPEAR13XX
1090 default 0xf0000be0 if ARCH_EBSA110
1091 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
1092 default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
1094 default 0xf7fc9000 if DEBUG_BERLIN_UART
1095 default 0xf8b00000 if DEBUG_HI3716_UART
1096 default 0xfcb00000 if DEBUG_HI3620_UART
1097 default 0xfe800000 if ARCH_IOP32X
1098 default 0xffc02000 if DEBUG_SOCFPGA_UART
1099 default 0xffd82340 if ARCH_IOP13XX
1100 default 0xfff36000 if DEBUG_HIGHBANK_UART
1101 default 0xfffff700 if ARCH_IOP33X
1102 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1103 DEBUG_LL_UART_EFM32 || \
1104 DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_S3C24XX_UART
1106 config DEBUG_UART_VIRT
1107 hex "Virtual base address of debug UART"
1108 default 0xe0010fe0 if ARCH_RPC
1109 default 0xf0000be0 if ARCH_EBSA110
1110 default 0xf0009000 if DEBUG_CNS3XXX
1111 default 0xf01fb000 if DEBUG_NOMADIK_UART
1112 default 0xf0201000 if DEBUG_BCM2835
1113 default 0xf1000300 if DEBUG_BCM_5301X
1114 default 0xf11f1000 if ARCH_VERSATILE
1115 default 0xf1600000 if ARCH_INTEGRATOR
1116 default 0xf1c28000 if DEBUG_SUNXI_UART0
1117 default 0xf1c28400 if DEBUG_SUNXI_UART1
1118 default 0xf2100000 if DEBUG_PXA_UART1
1119 default 0xf4090000 if ARCH_LPC32XX
1120 default 0xf4200000 if ARCH_GEMINI
1121 default 0xf7000000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART0 || \
1122 DEBUG_S3C2410_UART0)
1123 default 0xf7004000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART1 || \
1124 DEBUG_S3C2410_UART1)
1125 default 0xf7008000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART2 || \
1126 DEBUG_S3C2410_UART2)
1127 default 0xf7fc9000 if DEBUG_BERLIN_UART
1128 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
1129 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
1130 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
1131 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
1132 default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1133 default 0xfd000000 if ARCH_SPEAR13XX
1134 default 0xfd012000 if ARCH_MV78XX0
1135 default 0xfde12000 if ARCH_DOVE
1136 default 0xfe012000 if ARCH_ORION5X
1137 default 0xfe017000 if DEBUG_MMP_UART2
1138 default 0xfe018000 if DEBUG_MMP_UART3
1139 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
1140 default 0xfe230000 if DEBUG_PICOXCELL_UART
1141 default 0xfe300000 if DEBUG_BCM_KONA_UART
1142 default 0xfe800000 if ARCH_IOP32X
1143 default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HI3716_UART
1144 default 0xfeb24000 if DEBUG_RK3X_UART0
1145 default 0xfeb26000 if DEBUG_RK3X_UART1
1146 default 0xfeb30c00 if DEBUG_KEYSTONE_UART0
1147 default 0xfeb31000 if DEBUG_KEYSTONE_UART1
1148 default 0xfec02000 if DEBUG_SOCFPGA_UART
1149 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
1150 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0
1151 default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1
1152 default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2
1153 default 0xfed12000 if ARCH_KIRKWOOD
1154 default 0xfed60000 if DEBUG_RK29_UART0
1155 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1156 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1157 default 0xfedc0000 if ARCH_EP93XX
1158 default 0xfee003f8 if FOOTBRIDGE
1159 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1160 default 0xfee82340 if ARCH_IOP13XX
1161 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1162 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1163 default 0xfef36000 if DEBUG_HIGHBANK_UART
1164 default 0xfefff700 if ARCH_IOP33X
1165 default 0xff003000 if DEBUG_U300_UART
1166 default DEBUG_UART_PHYS if !MMU
1167 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1168 DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_S3C24XX_UART
1170 config DEBUG_UART_8250_SHIFT
1171 int "Register offset shift for the 8250 debug UART"
1172 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1173 default 0 if FOOTBRIDGE || ARCH_IOP32X
1176 config DEBUG_UART_8250_WORD
1177 bool "Use 32-bit accesses for 8250 UART"
1178 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1179 depends on DEBUG_UART_8250_SHIFT >= 2
1180 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
1182 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
1183 DEBUG_DAVINCI_DA8XX_UART2 || \
1186 config DEBUG_UART_8250_FLOW_CONTROL
1187 bool "Enable flow control for 8250 UART"
1188 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1189 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
1191 config DEBUG_UNCOMPRESS
1193 depends on ARCH_MULTIPLATFORM || ARCH_MSM || PLAT_SAMSUNG
1194 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
1195 (!DEBUG_TEGRA_UART || !ZBOOT_ROM)
1197 This option influences the normal decompressor output for
1198 multiplatform kernels. Normally, multiplatform kernels disable
1199 decompressor output because it is not possible to know where to
1200 send the decompressor output.
1202 When this option is set, the selected DEBUG_LL output method
1203 will be re-used for normal decompressor output on multiplatform
1207 config UNCOMPRESS_INCLUDE
1209 default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM || \
1210 PLAT_SAMSUNG || ARCH_EFM32
1211 default "mach/uncompress.h"
1217 Say Y here if you want to have an early console using the
1218 kernel low-level debugging functions. Add earlyprintk to your
1219 kernel parameters to enable this console.
1222 bool "On-chip ETM and ETB"
1225 Enables the on-chip embedded trace macrocell and embedded trace
1226 buffer driver that will allow you to collect traces of the
1229 config ARM_KPROBES_TEST
1230 tristate "Kprobes test module"
1231 depends on KPROBES && MODULES
1233 Perform tests of kprobes API and instruction set simulation.
1235 config PID_IN_CONTEXTIDR
1236 bool "Write the current PID to the CONTEXTIDR register"
1237 depends on CPU_COPY_V6
1239 Enabling this option causes the kernel to write the current PID to
1240 the PROCID field of the CONTEXTIDR register, at the expense of some
1241 additional instructions during context switch. Say Y here only if you
1242 are planning to use hardware trace tools with this kernel.
1244 config DEBUG_SET_MODULE_RONX
1245 bool "Set loadable kernel module data as NX and text as RO"
1248 This option helps catch unintended modifications to loadable
1249 kernel module's text and read-only data. It also prevents execution
1250 of module data. Such protection may interfere with run-time code
1251 patching and dynamic kernel tracing - and they might also protect
1252 against certain classes of kernel exploits.
1253 If in doubt, say "N".