3 source "lib/Kconfig.debug"
6 bool "Filter access to /dev/mem"
9 If this option is disabled, you allow userspace (root) access to all
10 of memory, including kernel and userspace memory. Accidental
11 access to this is obviously disastrous, but specific access can
12 be used by people debugging the kernel.
14 If this option is switched on, the /dev/mem file only allows
15 userspace access to memory mapped peripherals.
19 # RMK wants arm kernels compiled with frame pointers or stack unwinding.
20 # If you know what you are doing and are willing to live without stack
21 # traces, you can get a slightly smaller kernel by setting this option to
22 # n, but then RMK will have to kill you ;).
25 depends on !THUMB2_KERNEL
26 default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
28 If you say N here, the resulting kernel will be slightly smaller and
29 faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
30 when a problem occurs with the kernel, the information that is
31 reported is severely limited.
34 bool "Enable stack unwinding support (EXPERIMENTAL)"
38 This option enables stack unwinding support in the kernel
39 using the information automatically generated by the
40 compiler. The resulting kernel image is slightly bigger but
41 the performance is not affected. Currently, this feature
42 only works with EABI compilers. If unsure say Y.
46 depends on FUNCTION_TRACER && FRAME_POINTER
50 bool "Verbose user fault messages"
52 When a user program crashes due to an exception, the kernel can
53 print a brief message explaining what the problem was. This is
54 sometimes helpful for debugging but serves no purpose on a
55 production system. Most people should say N here.
57 In addition, you need to pass user_debug=N on the kernel command
58 line to enable this feature. N consists of the sum of:
60 1 - undefined instruction events
62 4 - invalid data aborts
66 # These options are only for real kernel hackers who want to get their hands dirty.
68 bool "Kernel low-level debugging functions (read help!)"
69 depends on DEBUG_KERNEL
71 Say Y here to include definitions of printascii, printch, printhex
72 in the kernel. This is helpful if you are debugging code that
73 executes before the console is initialized.
75 Note that selecting this option will limit the kernel to a single
76 UART definition, as specified below. Attempting to boot the kernel
77 image on a different platform *will not work*, so this option should
78 not be enabled for kernels that are intended to be portable.
81 prompt "Kernel low-level debugging port"
84 config AT91_DEBUG_LL_DBGU0
85 bool "Kernel low-level debugging on rm9200, 9260/9g20, 9261/9g10 and 9rl"
86 depends on HAVE_AT91_DBGU0
88 config AT91_DEBUG_LL_DBGU1
89 bool "Kernel low-level debugging on 9263 and 9g45"
90 depends on HAVE_AT91_DBGU1
93 bool "Kernel low-level debugging on BCM2835 PL011 UART"
94 depends on ARCH_BCM2835
95 select DEBUG_UART_PL01X
97 config DEBUG_CLPS711X_UART1
98 bool "Kernel low-level debugging messages via UART1"
99 depends on ARCH_CLPS711X
101 Say Y here if you want the debug print routines to direct
102 their output to the first serial port on these devices.
104 config DEBUG_CLPS711X_UART2
105 bool "Kernel low-level debugging messages via UART2"
106 depends on ARCH_CLPS711X
108 Say Y here if you want the debug print routines to direct
109 their output to the second serial port on these devices.
112 bool "Kernel Kernel low-level debugging on Cavium Networks CNS3xxx"
113 depends on ARCH_CNS3XXX
114 select DEBUG_UART_PL01X
116 Say Y here if you want the debug print routines to direct
117 their output to the CNS3xxx UART0.
119 config DEBUG_DAVINCI_DA8XX_UART1
120 bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
121 depends on ARCH_DAVINCI_DA8XX
122 select DEBUG_UART_8250
124 Say Y here if you want the debug print routines to direct
125 their output to UART1 serial port on DaVinci DA8XX devices.
127 config DEBUG_DAVINCI_DA8XX_UART2
128 bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
129 depends on ARCH_DAVINCI_DA8XX
130 select DEBUG_UART_8250
132 Say Y here if you want the debug print routines to direct
133 their output to UART2 serial port on DaVinci DA8XX devices.
135 config DEBUG_DAVINCI_DMx_UART0
136 bool "Kernel low-level debugging on DaVinci DMx using UART0"
137 depends on ARCH_DAVINCI_DMx
138 select DEBUG_UART_8250
140 Say Y here if you want the debug print routines to direct
141 their output to UART0 serial port on DaVinci DMx devices.
143 config DEBUG_DAVINCI_TNETV107X_UART1
144 bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
145 depends on ARCH_DAVINCI_TNETV107X
146 select DEBUG_UART_8250
148 Say Y here if you want the debug print routines to direct
149 their output to UART1 serial port on DaVinci TNETV107X
152 config DEBUG_ZYNQ_UART0
153 bool "Kernel low-level debugging on Xilinx Zynq using UART0"
156 Say Y here if you want the debug print routines to direct
157 their output to UART0 on the Zynq platform.
159 config DEBUG_ZYNQ_UART1
160 bool "Kernel low-level debugging on Xilinx Zynq using UART1"
163 Say Y here if you want the debug print routines to direct
164 their output to UART1 on the Zynq platform.
166 If you have a ZC702 board and want early boot messages to
167 appear on the USB serial adaptor, select this option.
169 config DEBUG_DC21285_PORT
170 bool "Kernel low-level debugging messages via footbridge serial port"
171 depends on FOOTBRIDGE
173 Say Y here if you want the debug print routines to direct
174 their output to the serial port in the DC21285 (Footbridge).
176 config DEBUG_FOOTBRIDGE_COM1
177 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
178 depends on FOOTBRIDGE
180 Say Y here if you want the debug print routines to direct
181 their output to the 8250 at PCI COM1.
183 config DEBUG_HI3620_UART
184 bool "Hisilicon HI3620 Debug UART"
185 depends on ARCH_HI3xxx
186 select DEBUG_UART_PL01X
188 Say Y here if you want kernel low-level debugging support
191 config DEBUG_HI3716_UART
192 bool "Hisilicon Hi3716 Debug UART"
193 depends on ARCH_HI3xxx
194 select DEBUG_UART_PL01X
196 Say Y here if you want kernel low-level debugging support
199 config DEBUG_HIGHBANK_UART
200 bool "Kernel low-level debugging messages via Highbank UART"
201 depends on ARCH_HIGHBANK
202 select DEBUG_UART_PL01X
204 Say Y here if you want the debug print routines to direct
205 their output to the UART on Highbank based devices.
207 config DEBUG_IMX1_UART
208 bool "i.MX1 Debug UART"
211 Say Y here if you want kernel low-level debugging support
214 config DEBUG_IMX23_UART
215 bool "i.MX23 Debug UART"
217 select DEBUG_UART_PL01X
219 Say Y here if you want kernel low-level debugging support
222 config DEBUG_IMX25_UART
223 bool "i.MX25 Debug UART"
226 Say Y here if you want kernel low-level debugging support
229 config DEBUG_IMX21_IMX27_UART
230 bool "i.MX21 and i.MX27 Debug UART"
231 depends on SOC_IMX21 || SOC_IMX27
233 Say Y here if you want kernel low-level debugging support
236 config DEBUG_IMX28_UART
237 bool "i.MX28 Debug UART"
239 select DEBUG_UART_PL01X
241 Say Y here if you want kernel low-level debugging support
244 config DEBUG_IMX31_UART
245 bool "i.MX31 Debug UART"
248 Say Y here if you want kernel low-level debugging support
251 config DEBUG_IMX35_UART
252 bool "i.MX35 Debug UART"
255 Say Y here if you want kernel low-level debugging support
258 config DEBUG_IMX51_UART
259 bool "i.MX51 Debug UART"
262 Say Y here if you want kernel low-level debugging support
265 config DEBUG_IMX53_UART
266 bool "i.MX53 Debug UART"
269 Say Y here if you want kernel low-level debugging support
272 config DEBUG_IMX6Q_UART
273 bool "i.MX6Q/DL Debug UART"
276 Say Y here if you want kernel low-level debugging support
279 config DEBUG_IMX6SL_UART
280 bool "i.MX6SL Debug UART"
281 depends on SOC_IMX6SL
283 Say Y here if you want kernel low-level debugging support
286 config DEBUG_KEYSTONE_UART0
287 bool "Kernel low-level debugging on KEYSTONE2 using UART0"
288 depends on ARCH_KEYSTONE
289 select DEBUG_UART_8250
291 Say Y here if you want the debug print routines to direct
292 their output to UART0 serial port on KEYSTONE2 devices.
294 config DEBUG_KEYSTONE_UART1
295 bool "Kernel low-level debugging on KEYSTONE2 using UART1"
296 depends on ARCH_KEYSTONE
297 select DEBUG_UART_8250
299 Say Y here if you want the debug print routines to direct
300 their output to UART1 serial port on KEYSTONE2 devices.
302 config DEBUG_MMP_UART2
303 bool "Kernel low-level debugging message via MMP UART2"
305 select DEBUG_UART_8250
307 Say Y here if you want kernel low-level debugging support
310 config DEBUG_MMP_UART3
311 bool "Kernel low-level debugging message via MMP UART3"
313 select DEBUG_UART_8250
315 Say Y here if you want kernel low-level debugging support
318 config DEBUG_MSM_UART1
319 bool "Kernel low-level debugging messages via MSM UART1"
320 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
322 Say Y here if you want the debug print routines to direct
323 their output to the first serial port on MSM devices.
325 config DEBUG_MSM_UART2
326 bool "Kernel low-level debugging messages via MSM UART2"
327 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
329 Say Y here if you want the debug print routines to direct
330 their output to the second serial port on MSM devices.
332 config DEBUG_MSM_UART3
333 bool "Kernel low-level debugging messages via MSM UART3"
334 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
336 Say Y here if you want the debug print routines to direct
337 their output to the third serial port on MSM devices.
339 config DEBUG_MSM8660_UART
340 bool "Kernel low-level debugging messages via MSM 8660 UART"
341 depends on ARCH_MSM8X60
342 select MSM_HAS_DEBUG_UART_HS
344 Say Y here if you want the debug print routines to direct
345 their output to the serial port on MSM 8660 devices.
347 config DEBUG_MSM8960_UART
348 bool "Kernel low-level debugging messages via MSM 8960 UART"
349 depends on ARCH_MSM8960
350 select MSM_HAS_DEBUG_UART_HS
352 Say Y here if you want the debug print routines to direct
353 their output to the serial port on MSM 8960 devices.
355 config DEBUG_MVEBU_UART
356 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
357 depends on ARCH_MVEBU
358 select DEBUG_UART_8250
360 Say Y here if you want kernel low-level debugging support
361 on MVEBU based platforms.
363 This option should be used with the old bootloaders
364 that left the internal registers mapped at
365 0xd0000000. As of today, this is the case on
366 platforms such as the Globalscale Mirabox or the
367 Plathome OpenBlocks AX3, when using the original
370 If the wrong DEBUG_MVEBU_UART* option is selected,
371 when u-boot hands over to the kernel, the system
372 silently crashes, with no serial output at all.
374 config DEBUG_MVEBU_UART_ALTERNATE
375 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
376 depends on ARCH_MVEBU
377 select DEBUG_UART_8250
379 Say Y here if you want kernel low-level debugging support
380 on MVEBU based platforms.
382 This option should be used with the new bootloaders
383 that remap the internal registers at 0xf1000000.
385 If the wrong DEBUG_MVEBU_UART* option is selected,
386 when u-boot hands over to the kernel, the system
387 silently crashes, with no serial output at all.
389 config DEBUG_NOMADIK_UART
390 bool "Kernel low-level debugging messages via NOMADIK UART"
391 depends on ARCH_NOMADIK
392 select DEBUG_UART_PL01X
394 Say Y here if you want kernel low-level debugging support
395 on NOMADIK based platforms.
397 config DEBUG_NSPIRE_CLASSIC_UART
398 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
399 depends on ARCH_NSPIRE
400 select DEBUG_UART_8250
402 Say Y here if you want kernel low-level debugging support
403 on TI-NSPIRE classic models.
405 config DEBUG_NSPIRE_CX_UART
406 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
407 depends on ARCH_NSPIRE
408 select DEBUG_UART_PL01X
410 Say Y here if you want kernel low-level debugging support
411 on TI-NSPIRE CX models.
413 config DEBUG_OMAP2UART1
414 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
415 depends on ARCH_OMAP2PLUS
416 select DEBUG_OMAP2PLUS_UART
418 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
419 omap3 torpedo and 3530 lv som.
421 config DEBUG_OMAP2UART2
422 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
423 depends on ARCH_OMAP2PLUS
424 select DEBUG_OMAP2PLUS_UART
426 config DEBUG_OMAP2UART3
427 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
428 depends on ARCH_OMAP2PLUS
429 select DEBUG_OMAP2PLUS_UART
431 config DEBUG_OMAP3UART3
432 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
433 depends on ARCH_OMAP2PLUS
434 select DEBUG_OMAP2PLUS_UART
436 This covers at least cm_t3x, beagle, crane, devkit8000,
437 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
440 config DEBUG_OMAP4UART3
441 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
442 depends on ARCH_OMAP2PLUS
443 select DEBUG_OMAP2PLUS_UART
445 config DEBUG_OMAP3UART4
446 bool "Kernel low-level debugging messages via OMAP36XX UART4"
447 depends on ARCH_OMAP2PLUS
448 select DEBUG_OMAP2PLUS_UART
450 config DEBUG_OMAP4UART4
451 bool "Kernel low-level debugging messages via OMAP4/5 UART4"
452 depends on ARCH_OMAP2PLUS
453 select DEBUG_OMAP2PLUS_UART
455 config DEBUG_TI81XXUART1
456 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
457 depends on ARCH_OMAP2PLUS
458 select DEBUG_OMAP2PLUS_UART
460 config DEBUG_TI81XXUART2
461 bool "Kernel low-level debugging messages via TI81XX UART2"
462 depends on ARCH_OMAP2PLUS
463 select DEBUG_OMAP2PLUS_UART
465 config DEBUG_TI81XXUART3
466 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
467 depends on ARCH_OMAP2PLUS
468 select DEBUG_OMAP2PLUS_UART
470 config DEBUG_AM33XXUART1
471 bool "Kernel low-level debugging messages via AM33XX UART1"
472 depends on ARCH_OMAP2PLUS
473 select DEBUG_OMAP2PLUS_UART
475 config DEBUG_ZOOM_UART
476 bool "Kernel low-level debugging messages via Zoom2/3 UART"
477 depends on ARCH_OMAP2PLUS
478 select DEBUG_OMAP2PLUS_UART
480 config DEBUG_PICOXCELL_UART
481 depends on ARCH_PICOXCELL
482 bool "Use PicoXcell UART for low-level debug"
483 select DEBUG_UART_8250
485 Say Y here if you want kernel low-level debugging support
486 on PicoXcell based platforms.
488 config DEBUG_PXA_UART1
490 bool "Use PXA UART1 for low-level debug"
491 select DEBUG_UART_8250
493 Say Y here if you want kernel low-level debugging support
496 config DEBUG_REALVIEW_STD_PORT
497 bool "RealView Default UART"
498 depends on ARCH_REALVIEW
499 select DEBUG_UART_PL01X
501 Say Y here if you want the debug print routines to direct
502 their output to the serial port on RealView EB, PB11MP, PBA8
505 config DEBUG_REALVIEW_PB1176_PORT
506 bool "RealView PB1176 UART"
507 depends on MACH_REALVIEW_PB1176
508 select DEBUG_UART_PL01X
510 Say Y here if you want the debug print routines to direct
511 their output to the standard serial port on the RealView
514 config DEBUG_RK29_UART0
515 bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
516 depends on ARCH_ROCKCHIP
517 select DEBUG_UART_8250
519 Say Y here if you want kernel low-level debugging support
520 on Rockchip based platforms.
522 config DEBUG_RK29_UART1
523 bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
524 depends on ARCH_ROCKCHIP
525 select DEBUG_UART_8250
527 Say Y here if you want kernel low-level debugging support
528 on Rockchip based platforms.
530 config DEBUG_RK29_UART2
531 bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
532 depends on ARCH_ROCKCHIP
533 select DEBUG_UART_8250
535 Say Y here if you want kernel low-level debugging support
536 on Rockchip based platforms.
538 config DEBUG_RK3X_UART0
539 bool "Kernel low-level debugging messages via Rockchip RK3X UART0"
540 depends on ARCH_ROCKCHIP
541 select DEBUG_UART_8250
543 Say Y here if you want kernel low-level debugging support
544 on Rockchip based platforms.
546 config DEBUG_RK3X_UART1
547 bool "Kernel low-level debugging messages via Rockchip RK3X UART1"
548 depends on ARCH_ROCKCHIP
549 select DEBUG_UART_8250
551 Say Y here if you want kernel low-level debugging support
552 on Rockchip based platforms.
554 config DEBUG_RK3X_UART2
555 bool "Kernel low-level debugging messages via Rockchip RK3X UART2"
556 depends on ARCH_ROCKCHIP
557 select DEBUG_UART_8250
559 Say Y here if you want kernel low-level debugging support
560 on Rockchip based platforms.
562 config DEBUG_RK3X_UART3
563 bool "Kernel low-level debugging messages via Rockchip RK3X UART3"
564 depends on ARCH_ROCKCHIP
565 select DEBUG_UART_8250
567 Say Y here if you want kernel low-level debugging support
568 on Rockchip based platforms.
570 config DEBUG_S3C_UART0
571 depends on PLAT_SAMSUNG
572 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
573 bool "Use S3C UART 0 for low-level debug"
575 Say Y here if you want the debug print routines to direct
576 their output to UART 0. The port must have been initialised
577 by the boot-loader before use.
579 The uncompressor code port configuration is now handled
580 by CONFIG_S3C_LOWLEVEL_UART_PORT.
582 config DEBUG_S3C_UART1
583 depends on PLAT_SAMSUNG
584 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
585 bool "Use S3C UART 1 for low-level debug"
587 Say Y here if you want the debug print routines to direct
588 their output to UART 1. The port must have been initialised
589 by the boot-loader before use.
591 The uncompressor code port configuration is now handled
592 by CONFIG_S3C_LOWLEVEL_UART_PORT.
594 config DEBUG_S3C_UART2
595 depends on PLAT_SAMSUNG
596 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
597 bool "Use S3C UART 2 for low-level debug"
599 Say Y here if you want the debug print routines to direct
600 their output to UART 2. The port must have been initialised
601 by the boot-loader before use.
603 The uncompressor code port configuration is now handled
604 by CONFIG_S3C_LOWLEVEL_UART_PORT.
606 config DEBUG_S3C_UART3
607 depends on PLAT_SAMSUNG && ARCH_EXYNOS
608 select DEBUG_EXYNOS_UART
609 bool "Use S3C UART 3 for low-level debug"
611 Say Y here if you want the debug print routines to direct
612 their output to UART 3. The port must have been initialised
613 by the boot-loader before use.
615 The uncompressor code port configuration is now handled
616 by CONFIG_S3C_LOWLEVEL_UART_PORT.
618 config DEBUG_SOCFPGA_UART
619 depends on ARCH_SOCFPGA
620 bool "Use SOCFPGA UART for low-level debug"
621 select DEBUG_UART_8250
623 Say Y here if you want kernel low-level debugging support
624 on SOCFPGA based platforms.
626 config DEBUG_SUNXI_UART0
627 bool "Kernel low-level debugging messages via sunXi UART0"
628 depends on ARCH_SUNXI
629 select DEBUG_UART_8250
631 Say Y here if you want kernel low-level debugging support
632 on Allwinner A1X based platforms on the UART0.
634 config DEBUG_SUNXI_UART1
635 bool "Kernel low-level debugging messages via sunXi UART1"
636 depends on ARCH_SUNXI
637 select DEBUG_UART_8250
639 Say Y here if you want kernel low-level debugging support
640 on Allwinner A1X based platforms on the UART1.
642 config TEGRA_DEBUG_UART_AUTO_ODMDATA
643 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
644 depends on ARCH_TEGRA
645 select DEBUG_TEGRA_UART
647 Automatically determines which UART to use for low-level
648 debug based on the ODMDATA value. This value is part of
649 the BCT, and is written to the boot memory device using
650 nvflash, or other flashing tool. When bits 19:18 are 3,
651 then bits 17:15 indicate which UART to use; 0/1/2/3/4
654 config TEGRA_DEBUG_UARTA
655 bool "Kernel low-level debugging messages via Tegra UART A"
656 depends on ARCH_TEGRA
657 select DEBUG_TEGRA_UART
659 Say Y here if you want kernel low-level debugging support
660 on Tegra based platforms.
662 config TEGRA_DEBUG_UARTB
663 bool "Kernel low-level debugging messages via Tegra UART B"
664 depends on ARCH_TEGRA
665 select DEBUG_TEGRA_UART
667 Say Y here if you want kernel low-level debugging support
668 on Tegra based platforms.
670 config TEGRA_DEBUG_UARTC
671 bool "Kernel low-level debugging messages via Tegra UART C"
672 depends on ARCH_TEGRA
673 select DEBUG_TEGRA_UART
675 Say Y here if you want kernel low-level debugging support
676 on Tegra based platforms.
678 config TEGRA_DEBUG_UARTD
679 bool "Kernel low-level debugging messages via Tegra UART D"
680 depends on ARCH_TEGRA
681 select DEBUG_TEGRA_UART
683 Say Y here if you want kernel low-level debugging support
684 on Tegra based platforms.
686 config TEGRA_DEBUG_UARTE
687 bool "Kernel low-level debugging messages via Tegra UART E"
688 depends on ARCH_TEGRA
689 select DEBUG_TEGRA_UART
691 Say Y here if you want kernel low-level debugging support
692 on Tegra based platforms.
694 config DEBUG_SIRFPRIMA2_UART1
695 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
696 depends on ARCH_PRIMA2
698 Say Y here if you want the debug print routines to direct
699 their output to the uart1 port on SiRFprimaII devices.
701 config DEBUG_SIRFMARCO_UART1
702 bool "Kernel low-level debugging messages via SiRFmarco UART1"
703 depends on ARCH_MARCO
705 Say Y here if you want the debug print routines to direct
706 their output to the uart1 port on SiRFmarco devices.
708 config STIH41X_DEBUG_ASC2
709 bool "Use StiH415/416 ASC2 UART for low-level debug"
711 select DEBUG_STI_UART
713 Say Y here if you want kernel low-level debugging support
714 on STiH415/416 based platforms like b2000, which has
715 default UART wired up to ASC2.
719 config STIH41X_DEBUG_SBC_ASC1
720 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
722 select DEBUG_STI_UART
724 Say Y here if you want kernel low-level debugging support
725 on STiH415/416 based platforms like b2020. which has
726 default UART wired up to SBC ASC1.
730 config DEBUG_U300_UART
731 bool "Kernel low-level debugging messages via U300 UART0"
733 select DEBUG_UART_PL01X
735 Say Y here if you want the debug print routines to direct
736 their output to the uart port on U300 devices.
738 config DEBUG_UX500_UART
739 depends on ARCH_U8500
740 bool "Use Ux500 UART for low-level debug"
742 Say Y here if you want kernel low-level debugging support
743 on Ux500 based platforms.
745 config DEBUG_VEXPRESS_UART0_DETECT
746 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
747 depends on ARCH_VEXPRESS && CPU_CP15_MMU
749 This option enables a simple heuristic which tries to determine
750 the motherboard's memory map variant (original or RS1) and then
751 choose the relevant UART0 base address.
753 Note that this will only work with standard A-class core tiles,
754 and may fail with non-standard SMM or custom software models.
756 config DEBUG_VEXPRESS_UART0_CA9
757 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
758 depends on ARCH_VEXPRESS
759 select DEBUG_UART_PL01X
761 This option selects UART0 at 0x10009000. Except for custom models,
762 this applies only to the V2P-CA9 tile.
764 config DEBUG_VEXPRESS_UART0_RS1
765 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
766 depends on ARCH_VEXPRESS
767 select DEBUG_UART_PL01X
769 This option selects UART0 at 0x1c090000. This applies to most
770 of the tiles using the RS1 memory map, including all new A-class
771 core tiles, FPGA-based SMMs and software models.
773 config DEBUG_VEXPRESS_UART0_CRX
774 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
775 depends on ARCH_VEXPRESS && !MMU
776 select DEBUG_UART_PL01X
778 This option selects UART0 at 0xb0090000. This is appropriate for
779 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
781 config DEBUG_VT8500_UART0
782 bool "Use UART0 on VIA/Wondermedia SoCs"
783 depends on ARCH_VT8500
785 This option selects UART0 on VIA/Wondermedia System-on-a-chip
786 devices, including VT8500, WM8505, WM8650 and WM8850.
788 config DEBUG_LL_UART_NONE
789 bool "No low-level debugging UART"
790 depends on !ARCH_MULTIPLATFORM
792 Say Y here if your platform doesn't provide a UART option
793 above. This relies on your platform choosing the right UART
794 definition internally in order for low-level debugging to
798 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
800 Say Y here if you want the debug print routines to direct
801 their output to the EmbeddedICE macrocell's DCC channel using
802 co-processor 14. This is known to work on the ARM9 style ICE
803 channel and on the XScale with the PEEDI.
805 Note that the system will appear to hang during boot if there
806 is nothing connected to read from the DCC.
808 config DEBUG_SEMIHOSTING
809 bool "Kernel low-level debug output via semihosting I/O"
811 Semihosting enables code running on an ARM target to use
812 the I/O facilities on a host debugger/emulator through a
813 simple SVC call. The host debugger or emulator must have
814 semihosting enabled for the special svc call to be trapped
815 otherwise the kernel will crash.
817 This is known to work with OpenOCD, as well as
818 ARM's Fast Models, or any other controlling environment
819 that implements semihosting.
821 For more details about semihosting, please see
822 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
824 config DEBUG_LL_UART_8250
825 bool "Kernel low-level debugging via 8250 UART"
827 Say Y here if you wish the debug print routes to direct
828 their output to an 8250 UART. You can use this option
829 to provide the parameters for the 8250 UART rather than
830 selecting one of the platform specific options above if
831 you know the parameters for the port.
833 This option is preferred over the platform specific
834 options; the platform specific options are deprecated
835 and will be soon removed.
837 config DEBUG_LL_UART_PL01X
838 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
840 Say Y here if you wish the debug print routes to direct
841 their output to a PL01x Primecell UART. You can use
842 this option to provide the parameters for the UART
843 rather than selecting one of the platform specific
844 options above if you know the parameters for the port.
846 This option is preferred over the platform specific
847 options; the platform specific options are deprecated
848 and will be soon removed.
852 config DEBUG_EXYNOS_UART
855 config DEBUG_OMAP2PLUS_UART
857 depends on ARCH_OMAP2PLUS
859 config DEBUG_IMX_UART_PORT
860 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
861 DEBUG_IMX25_UART || \
862 DEBUG_IMX21_IMX27_UART || \
863 DEBUG_IMX31_UART || \
864 DEBUG_IMX35_UART || \
865 DEBUG_IMX51_UART || \
866 DEBUG_IMX53_UART || \
867 DEBUG_IMX6Q_UART || \
872 Choose UART port on which kernel low-level debug messages
875 config DEBUG_TEGRA_UART
877 depends on ARCH_TEGRA
879 config DEBUG_STI_UART
883 config DEBUG_LL_INCLUDE
885 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
886 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
887 default "debug/exynos.S" if DEBUG_EXYNOS_UART
888 default "debug/icedcc.S" if DEBUG_ICEDCC
889 default "debug/imx.S" if DEBUG_IMX1_UART || \
890 DEBUG_IMX25_UART || \
891 DEBUG_IMX21_IMX27_UART || \
892 DEBUG_IMX31_UART || \
893 DEBUG_IMX35_UART || \
894 DEBUG_IMX51_UART || \
896 DEBUG_IMX6Q_UART || \
898 default "debug/msm.S" if DEBUG_MSM_UART1 || \
901 DEBUG_MSM8660_UART || \
903 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
904 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
905 default "debug/sti.S" if DEBUG_STI_UART
906 default "debug/tegra.S" if DEBUG_TEGRA_UART
907 default "debug/ux500.S" if DEBUG_UX500_UART
908 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
909 default "debug/vt8500.S" if DEBUG_VT8500_UART0
910 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
911 default "mach/debug-macro.S"
913 # Compatibility options for PL01x
914 config DEBUG_UART_PL01X
915 def_bool ARCH_EP93XX || \
922 # Compatibility options for 8250
923 config DEBUG_UART_8250
924 def_bool ARCH_DOVE || ARCH_EBSA110 || \
925 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
926 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
927 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \
928 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
930 config DEBUG_UART_PHYS
931 hex "Physical base address of debug UART"
932 default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0
933 default 0x01c28000 if DEBUG_SUNXI_UART0
934 default 0x01c28400 if DEBUG_SUNXI_UART1
935 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1
936 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2
937 default 0x02530c00 if DEBUG_KEYSTONE_UART0
938 default 0x02531000 if DEBUG_KEYSTONE_UART1
939 default 0x03010fe0 if ARCH_RPC
940 default 0x08108300 if DEBUG_DAVINCI_TNETV107X_UART1
941 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
942 DEBUG_VEXPRESS_UART0_CA9
943 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
944 default 0x10124000 if DEBUG_RK3X_UART0
945 default 0x10126000 if DEBUG_RK3X_UART1
946 default 0x101f1000 if ARCH_VERSATILE
947 default 0x101fb000 if DEBUG_NOMADIK_UART
948 default 0x16000000 if ARCH_INTEGRATOR
949 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
950 default 0x20060000 if DEBUG_RK29_UART0
951 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
952 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
953 default 0x20201000 if DEBUG_BCM2835
954 default 0x40090000 if ARCH_LPC32XX
955 default 0x40100000 if DEBUG_PXA_UART1
956 default 0x42000000 if ARCH_GEMINI
957 default 0x7c0003f8 if FOOTBRIDGE
958 default 0x80230000 if DEBUG_PICOXCELL_UART
959 default 0x80070000 if DEBUG_IMX23_UART
960 default 0x80074000 if DEBUG_IMX28_UART
961 default 0x808c0000 if ARCH_EP93XX
962 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
963 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
964 default 0xc0013000 if DEBUG_U300_UART
965 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
966 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
967 default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
968 default 0xd0012000 if DEBUG_MVEBU_UART
969 default 0xd4017000 if DEBUG_MMP_UART2
970 default 0xd4018000 if DEBUG_MMP_UART3
971 default 0xe0000000 if ARCH_SPEAR13XX
972 default 0xf0000be0 if ARCH_EBSA110
973 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
974 default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
976 default 0xf8b00000 if DEBUG_HI3716_UART
977 default 0xfcb00000 if DEBUG_HI3620_UART
978 default 0xfe800000 if ARCH_IOP32X
979 default 0xffc02000 if DEBUG_SOCFPGA_UART
980 default 0xffd82340 if ARCH_IOP13XX
981 default 0xfff36000 if DEBUG_HIGHBANK_UART
982 default 0xfffff700 if ARCH_IOP33X
983 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
984 DEBUG_UART_8250 || DEBUG_UART_PL01X
986 config DEBUG_UART_VIRT
987 hex "Virtual base address of debug UART"
988 default 0xe0010fe0 if ARCH_RPC
989 default 0xf0000be0 if ARCH_EBSA110
990 default 0xf0009000 if DEBUG_CNS3XXX
991 default 0xf01fb000 if DEBUG_NOMADIK_UART
992 default 0xf0201000 if DEBUG_BCM2835
993 default 0xf11f1000 if ARCH_VERSATILE
994 default 0xf1600000 if ARCH_INTEGRATOR
995 default 0xf1c28000 if DEBUG_SUNXI_UART0
996 default 0xf1c28400 if DEBUG_SUNXI_UART1
997 default 0xf2100000 if DEBUG_PXA_UART1
998 default 0xf4090000 if ARCH_LPC32XX
999 default 0xf4200000 if ARCH_GEMINI
1000 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
1001 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
1002 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
1003 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
1004 default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1005 default 0xfd000000 if ARCH_SPEAR13XX
1006 default 0xfd012000 if ARCH_MV78XX0
1007 default 0xfde12000 if ARCH_DOVE
1008 default 0xfe012000 if ARCH_ORION5X
1009 default 0xfe017000 if DEBUG_MMP_UART2
1010 default 0xfe018000 if DEBUG_MMP_UART3
1011 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
1012 default 0xfe230000 if DEBUG_PICOXCELL_UART
1013 default 0xfe800000 if ARCH_IOP32X
1014 default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HI3716_UART
1015 default 0xfeb24000 if DEBUG_RK3X_UART0
1016 default 0xfeb26000 if DEBUG_RK3X_UART1
1017 default 0xfeb30c00 if DEBUG_KEYSTONE_UART0
1018 default 0xfeb31000 if DEBUG_KEYSTONE_UART1
1019 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
1020 default 0xfed60000 if DEBUG_RK29_UART0
1021 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1022 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1023 default 0xfec02000 if DEBUG_SOCFPGA_UART
1024 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0
1025 default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1
1026 default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2
1027 default 0xfed12000 if ARCH_KIRKWOOD
1028 default 0xfedc0000 if ARCH_EP93XX
1029 default 0xfee003f8 if FOOTBRIDGE
1030 default 0xfee08300 if DEBUG_DAVINCI_TNETV107X_UART1
1031 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1032 default 0xfef36000 if DEBUG_HIGHBANK_UART
1033 default 0xfee82340 if ARCH_IOP13XX
1034 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1035 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1036 default 0xfefff700 if ARCH_IOP33X
1037 default 0xff003000 if DEBUG_U300_UART
1038 default DEBUG_UART_PHYS if !MMU
1039 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1040 DEBUG_UART_8250 || DEBUG_UART_PL01X
1042 config DEBUG_UART_8250_SHIFT
1043 int "Register offset shift for the 8250 debug UART"
1044 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1045 default 0 if FOOTBRIDGE || ARCH_IOP32X
1048 config DEBUG_UART_8250_WORD
1049 bool "Use 32-bit accesses for 8250 UART"
1050 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1051 depends on DEBUG_UART_8250_SHIFT >= 2
1052 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
1054 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
1055 DEBUG_DAVINCI_DA8XX_UART2 || DEBUG_DAVINCI_TNETV107X_UART1
1057 config DEBUG_UART_8250_FLOW_CONTROL
1058 bool "Enable flow control for 8250 UART"
1059 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1060 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
1062 config DEBUG_UNCOMPRESS
1064 depends on ARCH_MULTIPLATFORM || ARCH_MSM
1065 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
1066 (!DEBUG_TEGRA_UART || !ZBOOT_ROM)
1068 This option influences the normal decompressor output for
1069 multiplatform kernels. Normally, multiplatform kernels disable
1070 decompressor output because it is not possible to know where to
1071 send the decompressor output.
1073 When this option is set, the selected DEBUG_LL output method
1074 will be re-used for normal decompressor output on multiplatform
1078 config UNCOMPRESS_INCLUDE
1080 default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM
1081 default "mach/uncompress.h"
1087 Say Y here if you want to have an early console using the
1088 kernel low-level debugging functions. Add earlyprintk to your
1089 kernel parameters to enable this console.
1092 bool "On-chip ETM and ETB"
1095 Enables the on-chip embedded trace macrocell and embedded trace
1096 buffer driver that will allow you to collect traces of the
1099 config ARM_KPROBES_TEST
1100 tristate "Kprobes test module"
1101 depends on KPROBES && MODULES
1103 Perform tests of kprobes API and instruction set simulation.
1105 config PID_IN_CONTEXTIDR
1106 bool "Write the current PID to the CONTEXTIDR register"
1107 depends on CPU_COPY_V6
1109 Enabling this option causes the kernel to write the current PID to
1110 the PROCID field of the CONTEXTIDR register, at the expense of some
1111 additional instructions during context switch. Say Y here only if you
1112 are planning to use hardware trace tools with this kernel.