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
321 select DEBUG_MSM_UART
323 Say Y here if you want the debug print routines to direct
324 their output to the first serial port on MSM devices.
326 config DEBUG_MSM_UART2
327 bool "Kernel low-level debugging messages via MSM UART2"
328 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
329 select DEBUG_MSM_UART
331 Say Y here if you want the debug print routines to direct
332 their output to the second serial port on MSM devices.
334 config DEBUG_MSM_UART3
335 bool "Kernel low-level debugging messages via MSM UART3"
336 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
337 select DEBUG_MSM_UART
339 Say Y here if you want the debug print routines to direct
340 their output to the third serial port on MSM devices.
342 config DEBUG_MSM8660_UART
343 bool "Kernel low-level debugging messages via MSM 8660 UART"
344 depends on ARCH_MSM8X60
345 select MSM_HAS_DEBUG_UART_HS
346 select DEBUG_MSM_UART
348 Say Y here if you want the debug print routines to direct
349 their output to the serial port on MSM 8660 devices.
351 config DEBUG_MSM8960_UART
352 bool "Kernel low-level debugging messages via MSM 8960 UART"
353 depends on ARCH_MSM8960
354 select MSM_HAS_DEBUG_UART_HS
355 select DEBUG_MSM_UART
357 Say Y here if you want the debug print routines to direct
358 their output to the serial port on MSM 8960 devices.
360 config DEBUG_MSM8974_UART
361 bool "Kernel low-level debugging messages via MSM 8974 UART"
362 depends on ARCH_MSM8974
363 select MSM_HAS_DEBUG_UART_HS
364 select DEBUG_MSM_UART
366 Say Y here if you want the debug print routines to direct
367 their output to the serial port on MSM 8974 devices.
369 config DEBUG_MVEBU_UART
370 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
371 depends on ARCH_MVEBU
372 select DEBUG_UART_8250
374 Say Y here if you want kernel low-level debugging support
375 on MVEBU based platforms.
377 This option should be used with the old bootloaders
378 that left the internal registers mapped at
379 0xd0000000. As of today, this is the case on
380 platforms such as the Globalscale Mirabox or the
381 Plathome OpenBlocks AX3, when using the original
384 If the wrong DEBUG_MVEBU_UART* option is selected,
385 when u-boot hands over to the kernel, the system
386 silently crashes, with no serial output at all.
388 config DEBUG_MVEBU_UART_ALTERNATE
389 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
390 depends on ARCH_MVEBU
391 select DEBUG_UART_8250
393 Say Y here if you want kernel low-level debugging support
394 on MVEBU based platforms.
396 This option should be used with the new bootloaders
397 that remap the internal registers at 0xf1000000.
399 If the wrong DEBUG_MVEBU_UART* option is selected,
400 when u-boot hands over to the kernel, the system
401 silently crashes, with no serial output at all.
407 Say Y here if you want kernel low-level debugging support
408 on Vybrid based platforms.
410 config DEBUG_NOMADIK_UART
411 bool "Kernel low-level debugging messages via NOMADIK UART"
412 depends on ARCH_NOMADIK
413 select DEBUG_UART_PL01X
415 Say Y here if you want kernel low-level debugging support
416 on NOMADIK based platforms.
418 config DEBUG_NSPIRE_CLASSIC_UART
419 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
420 depends on ARCH_NSPIRE
421 select DEBUG_UART_8250
423 Say Y here if you want kernel low-level debugging support
424 on TI-NSPIRE classic models.
426 config DEBUG_NSPIRE_CX_UART
427 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
428 depends on ARCH_NSPIRE
429 select DEBUG_UART_PL01X
431 Say Y here if you want kernel low-level debugging support
432 on TI-NSPIRE CX models.
434 config DEBUG_OMAP2UART1
435 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
436 depends on ARCH_OMAP2PLUS
437 select DEBUG_OMAP2PLUS_UART
439 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
440 omap3 torpedo and 3530 lv som.
442 config DEBUG_OMAP2UART2
443 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
444 depends on ARCH_OMAP2PLUS
445 select DEBUG_OMAP2PLUS_UART
447 config DEBUG_OMAP2UART3
448 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
449 depends on ARCH_OMAP2PLUS
450 select DEBUG_OMAP2PLUS_UART
452 config DEBUG_OMAP3UART3
453 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
454 depends on ARCH_OMAP2PLUS
455 select DEBUG_OMAP2PLUS_UART
457 This covers at least cm_t3x, beagle, crane, devkit8000,
458 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
461 config DEBUG_OMAP4UART3
462 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
463 depends on ARCH_OMAP2PLUS
464 select DEBUG_OMAP2PLUS_UART
466 config DEBUG_OMAP3UART4
467 bool "Kernel low-level debugging messages via OMAP36XX UART4"
468 depends on ARCH_OMAP2PLUS
469 select DEBUG_OMAP2PLUS_UART
471 config DEBUG_OMAP4UART4
472 bool "Kernel low-level debugging messages via OMAP4/5 UART4"
473 depends on ARCH_OMAP2PLUS
474 select DEBUG_OMAP2PLUS_UART
476 config DEBUG_TI81XXUART1
477 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
478 depends on ARCH_OMAP2PLUS
479 select DEBUG_OMAP2PLUS_UART
481 config DEBUG_TI81XXUART2
482 bool "Kernel low-level debugging messages via TI81XX UART2"
483 depends on ARCH_OMAP2PLUS
484 select DEBUG_OMAP2PLUS_UART
486 config DEBUG_TI81XXUART3
487 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
488 depends on ARCH_OMAP2PLUS
489 select DEBUG_OMAP2PLUS_UART
491 config DEBUG_AM33XXUART1
492 bool "Kernel low-level debugging messages via AM33XX UART1"
493 depends on ARCH_OMAP2PLUS
494 select DEBUG_OMAP2PLUS_UART
496 config DEBUG_ZOOM_UART
497 bool "Kernel low-level debugging messages via Zoom2/3 UART"
498 depends on ARCH_OMAP2PLUS
499 select DEBUG_OMAP2PLUS_UART
501 config DEBUG_PICOXCELL_UART
502 depends on ARCH_PICOXCELL
503 bool "Use PicoXcell UART for low-level debug"
504 select DEBUG_UART_8250
506 Say Y here if you want kernel low-level debugging support
507 on PicoXcell based platforms.
509 config DEBUG_PXA_UART1
511 bool "Use PXA UART1 for low-level debug"
512 select DEBUG_UART_8250
514 Say Y here if you want kernel low-level debugging support
517 config DEBUG_REALVIEW_STD_PORT
518 bool "RealView Default UART"
519 depends on ARCH_REALVIEW
520 select DEBUG_UART_PL01X
522 Say Y here if you want the debug print routines to direct
523 their output to the serial port on RealView EB, PB11MP, PBA8
526 config DEBUG_REALVIEW_PB1176_PORT
527 bool "RealView PB1176 UART"
528 depends on MACH_REALVIEW_PB1176
529 select DEBUG_UART_PL01X
531 Say Y here if you want the debug print routines to direct
532 their output to the standard serial port on the RealView
535 config DEBUG_RK29_UART0
536 bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
537 depends on ARCH_ROCKCHIP
538 select DEBUG_UART_8250
540 Say Y here if you want kernel low-level debugging support
541 on Rockchip based platforms.
543 config DEBUG_RK29_UART1
544 bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
545 depends on ARCH_ROCKCHIP
546 select DEBUG_UART_8250
548 Say Y here if you want kernel low-level debugging support
549 on Rockchip based platforms.
551 config DEBUG_RK29_UART2
552 bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
553 depends on ARCH_ROCKCHIP
554 select DEBUG_UART_8250
556 Say Y here if you want kernel low-level debugging support
557 on Rockchip based platforms.
559 config DEBUG_RK3X_UART0
560 bool "Kernel low-level debugging messages via Rockchip RK3X UART0"
561 depends on ARCH_ROCKCHIP
562 select DEBUG_UART_8250
564 Say Y here if you want kernel low-level debugging support
565 on Rockchip based platforms.
567 config DEBUG_RK3X_UART1
568 bool "Kernel low-level debugging messages via Rockchip RK3X UART1"
569 depends on ARCH_ROCKCHIP
570 select DEBUG_UART_8250
572 Say Y here if you want kernel low-level debugging support
573 on Rockchip based platforms.
575 config DEBUG_RK3X_UART2
576 bool "Kernel low-level debugging messages via Rockchip RK3X UART2"
577 depends on ARCH_ROCKCHIP
578 select DEBUG_UART_8250
580 Say Y here if you want kernel low-level debugging support
581 on Rockchip based platforms.
583 config DEBUG_RK3X_UART3
584 bool "Kernel low-level debugging messages via Rockchip RK3X UART3"
585 depends on ARCH_ROCKCHIP
586 select DEBUG_UART_8250
588 Say Y here if you want kernel low-level debugging support
589 on Rockchip based platforms.
591 config DEBUG_S3C_UART0
592 depends on PLAT_SAMSUNG
593 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
594 bool "Use S3C UART 0 for low-level debug"
596 Say Y here if you want the debug print routines to direct
597 their output to UART 0. The port must have been initialised
598 by the boot-loader before use.
600 The uncompressor code port configuration is now handled
601 by CONFIG_S3C_LOWLEVEL_UART_PORT.
603 config DEBUG_S3C_UART1
604 depends on PLAT_SAMSUNG
605 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
606 bool "Use S3C UART 1 for low-level debug"
608 Say Y here if you want the debug print routines to direct
609 their output to UART 1. The port must have been initialised
610 by the boot-loader before use.
612 The uncompressor code port configuration is now handled
613 by CONFIG_S3C_LOWLEVEL_UART_PORT.
615 config DEBUG_S3C_UART2
616 depends on PLAT_SAMSUNG
617 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
618 bool "Use S3C UART 2 for low-level debug"
620 Say Y here if you want the debug print routines to direct
621 their output to UART 2. The port must have been initialised
622 by the boot-loader before use.
624 The uncompressor code port configuration is now handled
625 by CONFIG_S3C_LOWLEVEL_UART_PORT.
627 config DEBUG_S3C_UART3
628 depends on PLAT_SAMSUNG && ARCH_EXYNOS
629 select DEBUG_EXYNOS_UART
630 bool "Use S3C UART 3 for low-level debug"
632 Say Y here if you want the debug print routines to direct
633 their output to UART 3. The port must have been initialised
634 by the boot-loader before use.
636 The uncompressor code port configuration is now handled
637 by CONFIG_S3C_LOWLEVEL_UART_PORT.
639 config DEBUG_SOCFPGA_UART
640 depends on ARCH_SOCFPGA
641 bool "Use SOCFPGA UART for low-level debug"
642 select DEBUG_UART_8250
644 Say Y here if you want kernel low-level debugging support
645 on SOCFPGA based platforms.
647 config DEBUG_SUNXI_UART0
648 bool "Kernel low-level debugging messages via sunXi UART0"
649 depends on ARCH_SUNXI
650 select DEBUG_UART_8250
652 Say Y here if you want kernel low-level debugging support
653 on Allwinner A1X based platforms on the UART0.
655 config DEBUG_SUNXI_UART1
656 bool "Kernel low-level debugging messages via sunXi UART1"
657 depends on ARCH_SUNXI
658 select DEBUG_UART_8250
660 Say Y here if you want kernel low-level debugging support
661 on Allwinner A1X based platforms on the UART1.
663 config TEGRA_DEBUG_UART_AUTO_ODMDATA
664 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
665 depends on ARCH_TEGRA
666 select DEBUG_TEGRA_UART
668 Automatically determines which UART to use for low-level
669 debug based on the ODMDATA value. This value is part of
670 the BCT, and is written to the boot memory device using
671 nvflash, or other flashing tool. When bits 19:18 are 3,
672 then bits 17:15 indicate which UART to use; 0/1/2/3/4
675 config TEGRA_DEBUG_UARTA
676 bool "Kernel low-level debugging messages via Tegra UART A"
677 depends on ARCH_TEGRA
678 select DEBUG_TEGRA_UART
680 Say Y here if you want kernel low-level debugging support
681 on Tegra based platforms.
683 config TEGRA_DEBUG_UARTB
684 bool "Kernel low-level debugging messages via Tegra UART B"
685 depends on ARCH_TEGRA
686 select DEBUG_TEGRA_UART
688 Say Y here if you want kernel low-level debugging support
689 on Tegra based platforms.
691 config TEGRA_DEBUG_UARTC
692 bool "Kernel low-level debugging messages via Tegra UART C"
693 depends on ARCH_TEGRA
694 select DEBUG_TEGRA_UART
696 Say Y here if you want kernel low-level debugging support
697 on Tegra based platforms.
699 config TEGRA_DEBUG_UARTD
700 bool "Kernel low-level debugging messages via Tegra UART D"
701 depends on ARCH_TEGRA
702 select DEBUG_TEGRA_UART
704 Say Y here if you want kernel low-level debugging support
705 on Tegra based platforms.
707 config TEGRA_DEBUG_UARTE
708 bool "Kernel low-level debugging messages via Tegra UART E"
709 depends on ARCH_TEGRA
710 select DEBUG_TEGRA_UART
712 Say Y here if you want kernel low-level debugging support
713 on Tegra based platforms.
715 config DEBUG_SIRFPRIMA2_UART1
716 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
717 depends on ARCH_PRIMA2
719 Say Y here if you want the debug print routines to direct
720 their output to the uart1 port on SiRFprimaII devices.
722 config DEBUG_SIRFMARCO_UART1
723 bool "Kernel low-level debugging messages via SiRFmarco UART1"
724 depends on ARCH_MARCO
726 Say Y here if you want the debug print routines to direct
727 their output to the uart1 port on SiRFmarco devices.
729 config STIH41X_DEBUG_ASC2
730 bool "Use StiH415/416 ASC2 UART for low-level debug"
732 select DEBUG_STI_UART
734 Say Y here if you want kernel low-level debugging support
735 on STiH415/416 based platforms like b2000, which has
736 default UART wired up to ASC2.
740 config STIH41X_DEBUG_SBC_ASC1
741 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
743 select DEBUG_STI_UART
745 Say Y here if you want kernel low-level debugging support
746 on STiH415/416 based platforms like b2020. which has
747 default UART wired up to SBC ASC1.
751 config DEBUG_U300_UART
752 bool "Kernel low-level debugging messages via U300 UART0"
754 select DEBUG_UART_PL01X
756 Say Y here if you want the debug print routines to direct
757 their output to the uart port on U300 devices.
759 config DEBUG_UX500_UART
760 depends on ARCH_U8500
761 bool "Use Ux500 UART for low-level debug"
763 Say Y here if you want kernel low-level debugging support
764 on Ux500 based platforms.
766 config DEBUG_VEXPRESS_UART0_DETECT
767 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
768 depends on ARCH_VEXPRESS && CPU_CP15_MMU
770 This option enables a simple heuristic which tries to determine
771 the motherboard's memory map variant (original or RS1) and then
772 choose the relevant UART0 base address.
774 Note that this will only work with standard A-class core tiles,
775 and may fail with non-standard SMM or custom software models.
777 config DEBUG_VEXPRESS_UART0_CA9
778 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
779 depends on ARCH_VEXPRESS
780 select DEBUG_UART_PL01X
782 This option selects UART0 at 0x10009000. Except for custom models,
783 this applies only to the V2P-CA9 tile.
785 config DEBUG_VEXPRESS_UART0_RS1
786 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
787 depends on ARCH_VEXPRESS
788 select DEBUG_UART_PL01X
790 This option selects UART0 at 0x1c090000. This applies to most
791 of the tiles using the RS1 memory map, including all new A-class
792 core tiles, FPGA-based SMMs and software models.
794 config DEBUG_VEXPRESS_UART0_CRX
795 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
796 depends on ARCH_VEXPRESS && !MMU
797 select DEBUG_UART_PL01X
799 This option selects UART0 at 0xb0090000. This is appropriate for
800 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
802 config DEBUG_VT8500_UART0
803 bool "Use UART0 on VIA/Wondermedia SoCs"
804 depends on ARCH_VT8500
806 This option selects UART0 on VIA/Wondermedia System-on-a-chip
807 devices, including VT8500, WM8505, WM8650 and WM8850.
809 config DEBUG_LL_UART_NONE
810 bool "No low-level debugging UART"
811 depends on !ARCH_MULTIPLATFORM
813 Say Y here if your platform doesn't provide a UART option
814 above. This relies on your platform choosing the right UART
815 definition internally in order for low-level debugging to
819 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
821 Say Y here if you want the debug print routines to direct
822 their output to the EmbeddedICE macrocell's DCC channel using
823 co-processor 14. This is known to work on the ARM9 style ICE
824 channel and on the XScale with the PEEDI.
826 Note that the system will appear to hang during boot if there
827 is nothing connected to read from the DCC.
829 config DEBUG_SEMIHOSTING
830 bool "Kernel low-level debug output via semihosting I/O"
832 Semihosting enables code running on an ARM target to use
833 the I/O facilities on a host debugger/emulator through a
834 simple SVC call. The host debugger or emulator must have
835 semihosting enabled for the special svc call to be trapped
836 otherwise the kernel will crash.
838 This is known to work with OpenOCD, as well as
839 ARM's Fast Models, or any other controlling environment
840 that implements semihosting.
842 For more details about semihosting, please see
843 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
845 config DEBUG_LL_UART_8250
846 bool "Kernel low-level debugging via 8250 UART"
848 Say Y here if you wish the debug print routes to direct
849 their output to an 8250 UART. You can use this option
850 to provide the parameters for the 8250 UART rather than
851 selecting one of the platform specific options above if
852 you know the parameters for the port.
854 This option is preferred over the platform specific
855 options; the platform specific options are deprecated
856 and will be soon removed.
858 config DEBUG_LL_UART_EFM32
859 bool "Kernel low-level debugging via efm32 UART"
860 depends on ARCH_EFM32
862 Say Y here if you want the debug print routines to direct
863 their output to an UART or USART port on efm32 based
864 machines. Use the following addresses for DEBUG_UART_PHYS:
872 config DEBUG_LL_UART_PL01X
873 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
875 Say Y here if you wish the debug print routes to direct
876 their output to a PL01x Primecell UART. You can use
877 this option to provide the parameters for the UART
878 rather than selecting one of the platform specific
879 options above if you know the parameters for the port.
881 This option is preferred over the platform specific
882 options; the platform specific options are deprecated
883 and will be soon removed.
887 config DEBUG_EXYNOS_UART
890 config DEBUG_OMAP2PLUS_UART
892 depends on ARCH_OMAP2PLUS
894 config DEBUG_IMX_UART_PORT
895 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
896 DEBUG_IMX25_UART || \
897 DEBUG_IMX21_IMX27_UART || \
898 DEBUG_IMX31_UART || \
899 DEBUG_IMX35_UART || \
900 DEBUG_IMX51_UART || \
901 DEBUG_IMX53_UART || \
902 DEBUG_IMX6Q_UART || \
907 Choose UART port on which kernel low-level debug messages
910 config DEBUG_TEGRA_UART
912 depends on ARCH_TEGRA
914 config DEBUG_STI_UART
918 config DEBUG_MSM_UART
922 config DEBUG_LL_INCLUDE
924 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
925 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
926 default "debug/exynos.S" if DEBUG_EXYNOS_UART
927 default "debug/efm32.S" if DEBUG_LL_UART_EFM32
928 default "debug/icedcc.S" if DEBUG_ICEDCC
929 default "debug/imx.S" if DEBUG_IMX1_UART || \
930 DEBUG_IMX25_UART || \
931 DEBUG_IMX21_IMX27_UART || \
932 DEBUG_IMX31_UART || \
933 DEBUG_IMX35_UART || \
934 DEBUG_IMX51_UART || \
936 DEBUG_IMX6Q_UART || \
938 default "debug/msm.S" if DEBUG_MSM_UART
939 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
940 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
941 default "debug/sti.S" if DEBUG_STI_UART
942 default "debug/tegra.S" if DEBUG_TEGRA_UART
943 default "debug/ux500.S" if DEBUG_UX500_UART
944 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
945 default "debug/vf.S" if DEBUG_VF_UART
946 default "debug/vt8500.S" if DEBUG_VT8500_UART0
947 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
948 default "mach/debug-macro.S"
950 # Compatibility options for PL01x
951 config DEBUG_UART_PL01X
952 def_bool ARCH_EP93XX || \
959 # Compatibility options for 8250
960 config DEBUG_UART_8250
961 def_bool ARCH_DOVE || ARCH_EBSA110 || \
962 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
963 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
964 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \
965 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
967 config DEBUG_UART_PHYS
968 hex "Physical base address of debug UART"
969 default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0
970 default 0x01c28000 if DEBUG_SUNXI_UART0
971 default 0x01c28400 if DEBUG_SUNXI_UART1
972 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1
973 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2
974 default 0x02530c00 if DEBUG_KEYSTONE_UART0
975 default 0x02531000 if DEBUG_KEYSTONE_UART1
976 default 0x03010fe0 if ARCH_RPC
977 default 0x08108300 if DEBUG_DAVINCI_TNETV107X_UART1
978 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
979 DEBUG_VEXPRESS_UART0_CA9
980 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
981 default 0x10124000 if DEBUG_RK3X_UART0
982 default 0x10126000 if DEBUG_RK3X_UART1
983 default 0x101f1000 if ARCH_VERSATILE
984 default 0x101fb000 if DEBUG_NOMADIK_UART
985 default 0x16000000 if ARCH_INTEGRATOR
986 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
987 default 0x20060000 if DEBUG_RK29_UART0
988 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
989 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
990 default 0x20201000 if DEBUG_BCM2835
991 default 0x4000e400 if DEBUG_LL_UART_EFM32
992 default 0x40090000 if ARCH_LPC32XX
993 default 0x40100000 if DEBUG_PXA_UART1
994 default 0x42000000 if ARCH_GEMINI
995 default 0x7c0003f8 if FOOTBRIDGE
996 default 0x80230000 if DEBUG_PICOXCELL_UART
997 default 0x80070000 if DEBUG_IMX23_UART
998 default 0x80074000 if DEBUG_IMX28_UART
999 default 0x808c0000 if ARCH_EP93XX
1000 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1001 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
1002 default 0xc0013000 if DEBUG_U300_UART
1003 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1004 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1005 default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1006 default 0xd0012000 if DEBUG_MVEBU_UART
1007 default 0xd4017000 if DEBUG_MMP_UART2
1008 default 0xd4018000 if DEBUG_MMP_UART3
1009 default 0xe0000000 if ARCH_SPEAR13XX
1010 default 0xf0000be0 if ARCH_EBSA110
1011 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
1012 default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
1014 default 0xf8b00000 if DEBUG_HI3716_UART
1015 default 0xfcb00000 if DEBUG_HI3620_UART
1016 default 0xfe800000 if ARCH_IOP32X
1017 default 0xffc02000 if DEBUG_SOCFPGA_UART
1018 default 0xffd82340 if ARCH_IOP13XX
1019 default 0xfff36000 if DEBUG_HIGHBANK_UART
1020 default 0xfffff700 if ARCH_IOP33X
1021 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1022 DEBUG_LL_UART_EFM32 || \
1023 DEBUG_UART_8250 || DEBUG_UART_PL01X
1025 config DEBUG_UART_VIRT
1026 hex "Virtual base address of debug UART"
1027 default 0xe0010fe0 if ARCH_RPC
1028 default 0xf0000be0 if ARCH_EBSA110
1029 default 0xf0009000 if DEBUG_CNS3XXX
1030 default 0xf01fb000 if DEBUG_NOMADIK_UART
1031 default 0xf0201000 if DEBUG_BCM2835
1032 default 0xf11f1000 if ARCH_VERSATILE
1033 default 0xf1600000 if ARCH_INTEGRATOR
1034 default 0xf1c28000 if DEBUG_SUNXI_UART0
1035 default 0xf1c28400 if DEBUG_SUNXI_UART1
1036 default 0xf2100000 if DEBUG_PXA_UART1
1037 default 0xf4090000 if ARCH_LPC32XX
1038 default 0xf4200000 if ARCH_GEMINI
1039 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
1040 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
1041 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
1042 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
1043 default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1044 default 0xfd000000 if ARCH_SPEAR13XX
1045 default 0xfd012000 if ARCH_MV78XX0
1046 default 0xfde12000 if ARCH_DOVE
1047 default 0xfe012000 if ARCH_ORION5X
1048 default 0xfe017000 if DEBUG_MMP_UART2
1049 default 0xfe018000 if DEBUG_MMP_UART3
1050 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
1051 default 0xfe230000 if DEBUG_PICOXCELL_UART
1052 default 0xfe800000 if ARCH_IOP32X
1053 default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HI3716_UART
1054 default 0xfeb24000 if DEBUG_RK3X_UART0
1055 default 0xfeb26000 if DEBUG_RK3X_UART1
1056 default 0xfeb30c00 if DEBUG_KEYSTONE_UART0
1057 default 0xfeb31000 if DEBUG_KEYSTONE_UART1
1058 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
1059 default 0xfed60000 if DEBUG_RK29_UART0
1060 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1061 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1062 default 0xfec02000 if DEBUG_SOCFPGA_UART
1063 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0
1064 default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1
1065 default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2
1066 default 0xfed12000 if ARCH_KIRKWOOD
1067 default 0xfedc0000 if ARCH_EP93XX
1068 default 0xfee003f8 if FOOTBRIDGE
1069 default 0xfee08300 if DEBUG_DAVINCI_TNETV107X_UART1
1070 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1071 default 0xfef36000 if DEBUG_HIGHBANK_UART
1072 default 0xfee82340 if ARCH_IOP13XX
1073 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1074 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1075 default 0xfefff700 if ARCH_IOP33X
1076 default 0xff003000 if DEBUG_U300_UART
1077 default DEBUG_UART_PHYS if !MMU
1078 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1079 DEBUG_UART_8250 || DEBUG_UART_PL01X
1081 config DEBUG_UART_8250_SHIFT
1082 int "Register offset shift for the 8250 debug UART"
1083 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1084 default 0 if FOOTBRIDGE || ARCH_IOP32X
1087 config DEBUG_UART_8250_WORD
1088 bool "Use 32-bit accesses for 8250 UART"
1089 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1090 depends on DEBUG_UART_8250_SHIFT >= 2
1091 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
1093 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
1094 DEBUG_DAVINCI_DA8XX_UART2 || DEBUG_DAVINCI_TNETV107X_UART1
1096 config DEBUG_UART_8250_FLOW_CONTROL
1097 bool "Enable flow control for 8250 UART"
1098 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1099 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
1101 config DEBUG_UNCOMPRESS
1103 depends on ARCH_MULTIPLATFORM || ARCH_MSM
1104 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
1105 (!DEBUG_TEGRA_UART || !ZBOOT_ROM)
1107 This option influences the normal decompressor output for
1108 multiplatform kernels. Normally, multiplatform kernels disable
1109 decompressor output because it is not possible to know where to
1110 send the decompressor output.
1112 When this option is set, the selected DEBUG_LL output method
1113 will be re-used for normal decompressor output on multiplatform
1117 config UNCOMPRESS_INCLUDE
1119 default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM
1120 default "mach/uncompress.h"
1126 Say Y here if you want to have an early console using the
1127 kernel low-level debugging functions. Add earlyprintk to your
1128 kernel parameters to enable this console.
1131 bool "On-chip ETM and ETB"
1134 Enables the on-chip embedded trace macrocell and embedded trace
1135 buffer driver that will allow you to collect traces of the
1138 config ARM_KPROBES_TEST
1139 tristate "Kprobes test module"
1140 depends on KPROBES && MODULES
1142 Perform tests of kprobes API and instruction set simulation.
1144 config PID_IN_CONTEXTIDR
1145 bool "Write the current PID to the CONTEXTIDR register"
1146 depends on CPU_COPY_V6
1148 Enabling this option causes the kernel to write the current PID to
1149 the PROCID field of the CONTEXTIDR register, at the expense of some
1150 additional instructions during context switch. Say Y here only if you
1151 are planning to use hardware trace tools with this kernel.