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
123 Say Y here if you want the debug print routines to direct
124 their output to UART1 serial port on DaVinci DA8XX devices.
126 config DEBUG_DAVINCI_DA8XX_UART2
127 bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
128 depends on ARCH_DAVINCI_DA8XX
130 Say Y here if you want the debug print routines to direct
131 their output to UART2 serial port on DaVinci DA8XX devices.
133 config DEBUG_DAVINCI_DMx_UART0
134 bool "Kernel low-level debugging on DaVinci DMx using UART0"
135 depends on ARCH_DAVINCI_DMx
137 Say Y here if you want the debug print routines to direct
138 their output to UART0 serial port on DaVinci DMx devices.
140 config DEBUG_DAVINCI_TNETV107X_UART1
141 bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
142 depends on ARCH_DAVINCI_TNETV107X
144 Say Y here if you want the debug print routines to direct
145 their output to UART1 serial port on DaVinci TNETV107X
148 config DEBUG_ZYNQ_UART0
149 bool "Kernel low-level debugging on Xilinx Zynq using UART0"
152 Say Y here if you want the debug print routines to direct
153 their output to UART0 on the Zynq platform.
155 config DEBUG_ZYNQ_UART1
156 bool "Kernel low-level debugging on Xilinx Zynq using UART1"
159 Say Y here if you want the debug print routines to direct
160 their output to UART1 on the Zynq platform.
162 If you have a ZC702 board and want early boot messages to
163 appear on the USB serial adaptor, select this option.
165 config DEBUG_DC21285_PORT
166 bool "Kernel low-level debugging messages via footbridge serial port"
167 depends on FOOTBRIDGE
169 Say Y here if you want the debug print routines to direct
170 their output to the serial port in the DC21285 (Footbridge).
172 config DEBUG_FOOTBRIDGE_COM1
173 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
174 depends on FOOTBRIDGE
176 Say Y here if you want the debug print routines to direct
177 their output to the 8250 at PCI COM1.
179 config DEBUG_HIGHBANK_UART
180 bool "Kernel low-level debugging messages via Highbank UART"
181 depends on ARCH_HIGHBANK
182 select DEBUG_UART_PL01X
184 Say Y here if you want the debug print routines to direct
185 their output to the UART on Highbank based devices.
187 config DEBUG_IMX1_UART
188 bool "i.MX1 Debug UART"
191 Say Y here if you want kernel low-level debugging support
194 config DEBUG_IMX23_UART
195 bool "i.MX23 Debug UART"
197 select DEBUG_UART_PL01X
199 Say Y here if you want kernel low-level debugging support
202 config DEBUG_IMX25_UART
203 bool "i.MX25 Debug UART"
206 Say Y here if you want kernel low-level debugging support
209 config DEBUG_IMX21_IMX27_UART
210 bool "i.MX21 and i.MX27 Debug UART"
211 depends on SOC_IMX21 || SOC_IMX27
213 Say Y here if you want kernel low-level debugging support
216 config DEBUG_IMX28_UART
217 bool "i.MX28 Debug UART"
219 select DEBUG_UART_PL01X
221 Say Y here if you want kernel low-level debugging support
224 config DEBUG_IMX31_UART
225 bool "i.MX31 Debug UART"
228 Say Y here if you want kernel low-level debugging support
231 config DEBUG_IMX35_UART
232 bool "i.MX35 Debug UART"
235 Say Y here if you want kernel low-level debugging support
238 config DEBUG_IMX51_UART
239 bool "i.MX51 Debug UART"
242 Say Y here if you want kernel low-level debugging support
245 config DEBUG_IMX53_UART
246 bool "i.MX53 Debug UART"
249 Say Y here if you want kernel low-level debugging support
252 config DEBUG_IMX6Q_UART
253 bool "i.MX6Q/DL Debug UART"
256 Say Y here if you want kernel low-level debugging support
259 config DEBUG_IMX6SL_UART
260 bool "i.MX6SL Debug UART"
261 depends on SOC_IMX6SL
263 Say Y here if you want kernel low-level debugging support
266 config DEBUG_KEYSTONE_UART0
267 bool "Kernel low-level debugging on KEYSTONE2 using UART0"
268 depends on ARCH_KEYSTONE
270 Say Y here if you want the debug print routines to direct
271 their output to UART0 serial port on KEYSTONE2 devices.
273 config DEBUG_KEYSTONE_UART1
274 bool "Kernel low-level debugging on KEYSTONE2 using UART1"
275 depends on ARCH_KEYSTONE
277 Say Y here if you want the debug print routines to direct
278 their output to UART1 serial port on KEYSTONE2 devices.
280 config DEBUG_MMP_UART2
281 bool "Kernel low-level debugging message via MMP UART2"
283 select DEBUG_UART_8250
285 Say Y here if you want kernel low-level debugging support
288 config DEBUG_MMP_UART3
289 bool "Kernel low-level debugging message via MMP UART3"
291 select DEBUG_UART_8250
293 Say Y here if you want kernel low-level debugging support
296 config DEBUG_MSM_UART1
297 bool "Kernel low-level debugging messages via MSM UART1"
298 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
300 Say Y here if you want the debug print routines to direct
301 their output to the first serial port on MSM devices.
303 config DEBUG_MSM_UART2
304 bool "Kernel low-level debugging messages via MSM UART2"
305 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
307 Say Y here if you want the debug print routines to direct
308 their output to the second serial port on MSM devices.
310 config DEBUG_MSM_UART3
311 bool "Kernel low-level debugging messages via MSM UART3"
312 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
314 Say Y here if you want the debug print routines to direct
315 their output to the third serial port on MSM devices.
317 config DEBUG_MSM8660_UART
318 bool "Kernel low-level debugging messages via MSM 8660 UART"
319 depends on ARCH_MSM8X60
320 select MSM_HAS_DEBUG_UART_HS
322 Say Y here if you want the debug print routines to direct
323 their output to the serial port on MSM 8660 devices.
325 config DEBUG_MSM8960_UART
326 bool "Kernel low-level debugging messages via MSM 8960 UART"
327 depends on ARCH_MSM8960
328 select MSM_HAS_DEBUG_UART_HS
330 Say Y here if you want the debug print routines to direct
331 their output to the serial port on MSM 8960 devices.
333 config DEBUG_MVEBU_UART
334 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
335 depends on ARCH_MVEBU
336 select DEBUG_UART_8250
338 Say Y here if you want kernel low-level debugging support
339 on MVEBU based platforms.
341 This option should be used with the old bootloaders
342 that left the internal registers mapped at
343 0xd0000000. As of today, this is the case on
344 platforms such as the Globalscale Mirabox or the
345 Plathome OpenBlocks AX3, when using the original
348 If the wrong DEBUG_MVEBU_UART* option is selected,
349 when u-boot hands over to the kernel, the system
350 silently crashes, with no serial output at all.
352 config DEBUG_MVEBU_UART_ALTERNATE
353 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
354 depends on ARCH_MVEBU
355 select DEBUG_UART_8250
357 Say Y here if you want kernel low-level debugging support
358 on MVEBU based platforms.
360 This option should be used with the new bootloaders
361 that remap the internal registers at 0xf1000000.
363 If the wrong DEBUG_MVEBU_UART* option is selected,
364 when u-boot hands over to the kernel, the system
365 silently crashes, with no serial output at all.
367 config DEBUG_NOMADIK_UART
368 bool "Kernel low-level debugging messages via NOMADIK UART"
369 depends on ARCH_NOMADIK
370 select DEBUG_UART_PL01X
372 Say Y here if you want kernel low-level debugging support
373 on NOMADIK based platforms.
375 config DEBUG_NSPIRE_CLASSIC_UART
376 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
377 depends on ARCH_NSPIRE
378 select DEBUG_UART_8250
380 Say Y here if you want kernel low-level debugging support
381 on TI-NSPIRE classic models.
383 config DEBUG_NSPIRE_CX_UART
384 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
385 depends on ARCH_NSPIRE
386 select DEBUG_UART_PL01X
388 Say Y here if you want kernel low-level debugging support
389 on TI-NSPIRE CX models.
391 config DEBUG_OMAP2UART1
392 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
393 depends on ARCH_OMAP2PLUS
394 select DEBUG_OMAP2PLUS_UART
396 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
397 omap3 torpedo and 3530 lv som.
399 config DEBUG_OMAP2UART2
400 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
401 depends on ARCH_OMAP2PLUS
402 select DEBUG_OMAP2PLUS_UART
404 config DEBUG_OMAP2UART3
405 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
406 depends on ARCH_OMAP2PLUS
407 select DEBUG_OMAP2PLUS_UART
409 config DEBUG_OMAP3UART3
410 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
411 depends on ARCH_OMAP2PLUS
412 select DEBUG_OMAP2PLUS_UART
414 This covers at least cm_t3x, beagle, crane, devkit8000,
415 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
418 config DEBUG_OMAP4UART3
419 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
420 depends on ARCH_OMAP2PLUS
421 select DEBUG_OMAP2PLUS_UART
423 config DEBUG_OMAP3UART4
424 bool "Kernel low-level debugging messages via OMAP36XX UART4"
425 depends on ARCH_OMAP2PLUS
426 select DEBUG_OMAP2PLUS_UART
428 config DEBUG_OMAP4UART4
429 bool "Kernel low-level debugging messages via OMAP4/5 UART4"
430 depends on ARCH_OMAP2PLUS
431 select DEBUG_OMAP2PLUS_UART
433 config DEBUG_TI81XXUART1
434 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
435 depends on ARCH_OMAP2PLUS
436 select DEBUG_OMAP2PLUS_UART
438 config DEBUG_TI81XXUART2
439 bool "Kernel low-level debugging messages via TI81XX UART2"
440 depends on ARCH_OMAP2PLUS
441 select DEBUG_OMAP2PLUS_UART
443 config DEBUG_TI81XXUART3
444 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
445 depends on ARCH_OMAP2PLUS
446 select DEBUG_OMAP2PLUS_UART
448 config DEBUG_AM33XXUART1
449 bool "Kernel low-level debugging messages via AM33XX UART1"
450 depends on ARCH_OMAP2PLUS
451 select DEBUG_OMAP2PLUS_UART
453 config DEBUG_ZOOM_UART
454 bool "Kernel low-level debugging messages via Zoom2/3 UART"
455 depends on ARCH_OMAP2PLUS
456 select DEBUG_OMAP2PLUS_UART
458 config DEBUG_PICOXCELL_UART
459 depends on ARCH_PICOXCELL
460 bool "Use PicoXcell UART for low-level debug"
461 select DEBUG_UART_8250
463 Say Y here if you want kernel low-level debugging support
464 on PicoXcell based platforms.
466 config DEBUG_PXA_UART1
468 bool "Use PXA UART1 for low-level debug"
469 select DEBUG_UART_8250
471 Say Y here if you want kernel low-level debugging support
474 config DEBUG_REALVIEW_STD_PORT
475 bool "RealView Default UART"
476 depends on ARCH_REALVIEW
477 select DEBUG_UART_PL01X
479 Say Y here if you want the debug print routines to direct
480 their output to the serial port on RealView EB, PB11MP, PBA8
483 config DEBUG_REALVIEW_PB1176_PORT
484 bool "RealView PB1176 UART"
485 depends on MACH_REALVIEW_PB1176
486 select DEBUG_UART_PL01X
488 Say Y here if you want the debug print routines to direct
489 their output to the standard serial port on the RealView
492 config DEBUG_RK29_UART0
493 bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
494 depends on ARCH_ROCKCHIP
495 select DEBUG_UART_8250
497 Say Y here if you want kernel low-level debugging support
498 on Rockchip based platforms.
500 config DEBUG_RK29_UART1
501 bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
502 depends on ARCH_ROCKCHIP
503 select DEBUG_UART_8250
505 Say Y here if you want kernel low-level debugging support
506 on Rockchip based platforms.
508 config DEBUG_RK29_UART2
509 bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
510 depends on ARCH_ROCKCHIP
511 select DEBUG_UART_8250
513 Say Y here if you want kernel low-level debugging support
514 on Rockchip based platforms.
516 config DEBUG_RK3X_UART0
517 bool "Kernel low-level debugging messages via Rockchip RK3X UART0"
518 depends on ARCH_ROCKCHIP
519 select DEBUG_UART_8250
521 Say Y here if you want kernel low-level debugging support
522 on Rockchip based platforms.
524 config DEBUG_RK3X_UART1
525 bool "Kernel low-level debugging messages via Rockchip RK3X UART1"
526 depends on ARCH_ROCKCHIP
527 select DEBUG_UART_8250
529 Say Y here if you want kernel low-level debugging support
530 on Rockchip based platforms.
532 config DEBUG_RK3X_UART2
533 bool "Kernel low-level debugging messages via Rockchip RK3X UART2"
534 depends on ARCH_ROCKCHIP
535 select DEBUG_UART_8250
537 Say Y here if you want kernel low-level debugging support
538 on Rockchip based platforms.
540 config DEBUG_RK3X_UART3
541 bool "Kernel low-level debugging messages via Rockchip RK3X UART3"
542 depends on ARCH_ROCKCHIP
543 select DEBUG_UART_8250
545 Say Y here if you want kernel low-level debugging support
546 on Rockchip based platforms.
548 config DEBUG_S3C_UART0
549 depends on PLAT_SAMSUNG
550 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
551 bool "Use S3C UART 0 for low-level debug"
553 Say Y here if you want the debug print routines to direct
554 their output to UART 0. The port must have been initialised
555 by the boot-loader before use.
557 The uncompressor code port configuration is now handled
558 by CONFIG_S3C_LOWLEVEL_UART_PORT.
560 config DEBUG_S3C_UART1
561 depends on PLAT_SAMSUNG
562 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
563 bool "Use S3C UART 1 for low-level debug"
565 Say Y here if you want the debug print routines to direct
566 their output to UART 1. The port must have been initialised
567 by the boot-loader before use.
569 The uncompressor code port configuration is now handled
570 by CONFIG_S3C_LOWLEVEL_UART_PORT.
572 config DEBUG_S3C_UART2
573 depends on PLAT_SAMSUNG
574 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
575 bool "Use S3C UART 2 for low-level debug"
577 Say Y here if you want the debug print routines to direct
578 their output to UART 2. The port must have been initialised
579 by the boot-loader before use.
581 The uncompressor code port configuration is now handled
582 by CONFIG_S3C_LOWLEVEL_UART_PORT.
584 config DEBUG_S3C_UART3
585 depends on PLAT_SAMSUNG && ARCH_EXYNOS
586 select DEBUG_EXYNOS_UART
587 bool "Use S3C UART 3 for low-level debug"
589 Say Y here if you want the debug print routines to direct
590 their output to UART 3. The port must have been initialised
591 by the boot-loader before use.
593 The uncompressor code port configuration is now handled
594 by CONFIG_S3C_LOWLEVEL_UART_PORT.
596 config DEBUG_SOCFPGA_UART
597 depends on ARCH_SOCFPGA
598 bool "Use SOCFPGA UART for low-level debug"
599 select DEBUG_UART_8250
601 Say Y here if you want kernel low-level debugging support
602 on SOCFPGA based platforms.
604 config DEBUG_SUNXI_UART0
605 bool "Kernel low-level debugging messages via sunXi UART0"
606 depends on ARCH_SUNXI
607 select DEBUG_UART_8250
609 Say Y here if you want kernel low-level debugging support
610 on Allwinner A1X based platforms on the UART0.
612 config DEBUG_SUNXI_UART1
613 bool "Kernel low-level debugging messages via sunXi UART1"
614 depends on ARCH_SUNXI
615 select DEBUG_UART_8250
617 Say Y here if you want kernel low-level debugging support
618 on Allwinner A1X based platforms on the UART1.
620 config TEGRA_DEBUG_UART_AUTO_ODMDATA
621 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
622 depends on ARCH_TEGRA
623 select DEBUG_TEGRA_UART
625 Automatically determines which UART to use for low-level
626 debug based on the ODMDATA value. This value is part of
627 the BCT, and is written to the boot memory device using
628 nvflash, or other flashing tool. When bits 19:18 are 3,
629 then bits 17:15 indicate which UART to use; 0/1/2/3/4
632 config TEGRA_DEBUG_UARTA
633 bool "Kernel low-level debugging messages via Tegra UART A"
634 depends on ARCH_TEGRA
635 select DEBUG_TEGRA_UART
637 Say Y here if you want kernel low-level debugging support
638 on Tegra based platforms.
640 config TEGRA_DEBUG_UARTB
641 bool "Kernel low-level debugging messages via Tegra UART B"
642 depends on ARCH_TEGRA
643 select DEBUG_TEGRA_UART
645 Say Y here if you want kernel low-level debugging support
646 on Tegra based platforms.
648 config TEGRA_DEBUG_UARTC
649 bool "Kernel low-level debugging messages via Tegra UART C"
650 depends on ARCH_TEGRA
651 select DEBUG_TEGRA_UART
653 Say Y here if you want kernel low-level debugging support
654 on Tegra based platforms.
656 config TEGRA_DEBUG_UARTD
657 bool "Kernel low-level debugging messages via Tegra UART D"
658 depends on ARCH_TEGRA
659 select DEBUG_TEGRA_UART
661 Say Y here if you want kernel low-level debugging support
662 on Tegra based platforms.
664 config TEGRA_DEBUG_UARTE
665 bool "Kernel low-level debugging messages via Tegra UART E"
666 depends on ARCH_TEGRA
667 select DEBUG_TEGRA_UART
669 Say Y here if you want kernel low-level debugging support
670 on Tegra based platforms.
672 config DEBUG_SIRFPRIMA2_UART1
673 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
674 depends on ARCH_PRIMA2
676 Say Y here if you want the debug print routines to direct
677 their output to the uart1 port on SiRFprimaII devices.
679 config DEBUG_SIRFMARCO_UART1
680 bool "Kernel low-level debugging messages via SiRFmarco UART1"
681 depends on ARCH_MARCO
683 Say Y here if you want the debug print routines to direct
684 their output to the uart1 port on SiRFmarco devices.
686 config STIH41X_DEBUG_ASC2
687 bool "Use StiH415/416 ASC2 UART for low-level debug"
689 select DEBUG_STI_UART
691 Say Y here if you want kernel low-level debugging support
692 on STiH415/416 based platforms like b2000, which has
693 default UART wired up to ASC2.
697 config STIH41X_DEBUG_SBC_ASC1
698 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
700 select DEBUG_STI_UART
702 Say Y here if you want kernel low-level debugging support
703 on STiH415/416 based platforms like b2020. which has
704 default UART wired up to SBC ASC1.
708 config DEBUG_U300_UART
709 bool "Kernel low-level debugging messages via U300 UART0"
711 select DEBUG_UART_PL01X
713 Say Y here if you want the debug print routines to direct
714 their output to the uart port on U300 devices.
716 config DEBUG_UX500_UART
717 depends on ARCH_U8500
718 bool "Use Ux500 UART for low-level debug"
720 Say Y here if you want kernel low-level debugging support
721 on Ux500 based platforms.
723 config DEBUG_VEXPRESS_UART0_DETECT
724 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
725 depends on ARCH_VEXPRESS && CPU_CP15_MMU
727 This option enables a simple heuristic which tries to determine
728 the motherboard's memory map variant (original or RS1) and then
729 choose the relevant UART0 base address.
731 Note that this will only work with standard A-class core tiles,
732 and may fail with non-standard SMM or custom software models.
734 config DEBUG_VEXPRESS_UART0_CA9
735 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
736 depends on ARCH_VEXPRESS
737 select DEBUG_UART_PL01X
739 This option selects UART0 at 0x10009000. Except for custom models,
740 this applies only to the V2P-CA9 tile.
742 config DEBUG_VEXPRESS_UART0_RS1
743 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
744 depends on ARCH_VEXPRESS
745 select DEBUG_UART_PL01X
747 This option selects UART0 at 0x1c090000. This applies to most
748 of the tiles using the RS1 memory map, including all new A-class
749 core tiles, FPGA-based SMMs and software models.
751 config DEBUG_VEXPRESS_UART0_CRX
752 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
753 depends on ARCH_VEXPRESS && !MMU
754 select DEBUG_UART_PL01X
756 This option selects UART0 at 0xb0090000. This is appropriate for
757 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
759 config DEBUG_VT8500_UART0
760 bool "Use UART0 on VIA/Wondermedia SoCs"
761 depends on ARCH_VT8500
763 This option selects UART0 on VIA/Wondermedia System-on-a-chip
764 devices, including VT8500, WM8505, WM8650 and WM8850.
766 config DEBUG_LL_UART_NONE
767 bool "No low-level debugging UART"
768 depends on !ARCH_MULTIPLATFORM
770 Say Y here if your platform doesn't provide a UART option
771 above. This relies on your platform choosing the right UART
772 definition internally in order for low-level debugging to
776 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
778 Say Y here if you want the debug print routines to direct
779 their output to the EmbeddedICE macrocell's DCC channel using
780 co-processor 14. This is known to work on the ARM9 style ICE
781 channel and on the XScale with the PEEDI.
783 Note that the system will appear to hang during boot if there
784 is nothing connected to read from the DCC.
786 config DEBUG_SEMIHOSTING
787 bool "Kernel low-level debug output via semihosting I/O"
789 Semihosting enables code running on an ARM target to use
790 the I/O facilities on a host debugger/emulator through a
791 simple SVC call. The host debugger or emulator must have
792 semihosting enabled for the special svc call to be trapped
793 otherwise the kernel will crash.
795 This is known to work with OpenOCD, as well as
796 ARM's Fast Models, or any other controlling environment
797 that implements semihosting.
799 For more details about semihosting, please see
800 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
802 config DEBUG_LL_UART_8250
803 bool "Kernel low-level debugging via 8250 UART"
805 Say Y here if you wish the debug print routes to direct
806 their output to an 8250 UART. You can use this option
807 to provide the parameters for the 8250 UART rather than
808 selecting one of the platform specific options above if
809 you know the parameters for the port.
811 This option is preferred over the platform specific
812 options; the platform specific options are deprecated
813 and will be soon removed.
815 config DEBUG_LL_UART_PL01X
816 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
818 Say Y here if you wish the debug print routes to direct
819 their output to a PL01x Primecell UART. You can use
820 this option to provide the parameters for the UART
821 rather than selecting one of the platform specific
822 options above if you know the parameters for the port.
824 This option is preferred over the platform specific
825 options; the platform specific options are deprecated
826 and will be soon removed.
830 config DEBUG_EXYNOS_UART
833 config DEBUG_OMAP2PLUS_UART
835 depends on ARCH_OMAP2PLUS
837 config DEBUG_IMX_UART_PORT
838 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
839 DEBUG_IMX25_UART || \
840 DEBUG_IMX21_IMX27_UART || \
841 DEBUG_IMX31_UART || \
842 DEBUG_IMX35_UART || \
843 DEBUG_IMX51_UART || \
844 DEBUG_IMX53_UART || \
845 DEBUG_IMX6Q_UART || \
850 Choose UART port on which kernel low-level debug messages
853 config DEBUG_TEGRA_UART
855 depends on ARCH_TEGRA
857 config DEBUG_STI_UART
861 config DEBUG_LL_INCLUDE
863 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
864 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
865 default "debug/exynos.S" if DEBUG_EXYNOS_UART
866 default "debug/icedcc.S" if DEBUG_ICEDCC
867 default "debug/imx.S" if DEBUG_IMX1_UART || \
868 DEBUG_IMX25_UART || \
869 DEBUG_IMX21_IMX27_UART || \
870 DEBUG_IMX31_UART || \
871 DEBUG_IMX35_UART || \
872 DEBUG_IMX51_UART || \
874 DEBUG_IMX6Q_UART || \
876 default "debug/keystone.S" if DEBUG_KEYSTONE_UART0 || \
878 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
879 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
880 default "debug/sti.S" if DEBUG_STI_UART
881 default "debug/tegra.S" if DEBUG_TEGRA_UART
882 default "debug/ux500.S" if DEBUG_UX500_UART
883 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
884 default "debug/vt8500.S" if DEBUG_VT8500_UART0
885 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
886 default "mach/debug-macro.S"
888 # Compatibility options for PL01x
889 config DEBUG_UART_PL01X
890 def_bool ARCH_EP93XX || \
894 # Compatibility options for 8250
895 config DEBUG_UART_8250
896 def_bool ARCH_DOVE || ARCH_EBSA110 || \
897 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
898 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
899 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \
900 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
902 config DEBUG_UART_PHYS
903 hex "Physical base address of debug UART"
904 default 0x01c28000 if DEBUG_SUNXI_UART0
905 default 0x01c28400 if DEBUG_SUNXI_UART1
906 default 0x03010fe0 if ARCH_RPC
907 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
908 DEBUG_VEXPRESS_UART0_CA9
909 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
910 default 0x10124000 if DEBUG_RK3X_UART0
911 default 0x10126000 if DEBUG_RK3X_UART1
912 default 0x101f1000 if ARCH_VERSATILE
913 default 0x101fb000 if DEBUG_NOMADIK_UART
914 default 0x16000000 if ARCH_INTEGRATOR
915 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
916 default 0x20060000 if DEBUG_RK29_UART0
917 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
918 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
919 default 0x20201000 if DEBUG_BCM2835
920 default 0x40090000 if ARCH_LPC32XX
921 default 0x40100000 if DEBUG_PXA_UART1
922 default 0x42000000 if ARCH_GEMINI
923 default 0x7c0003f8 if FOOTBRIDGE
924 default 0x80230000 if DEBUG_PICOXCELL_UART
925 default 0x80070000 if DEBUG_IMX23_UART
926 default 0x80074000 if DEBUG_IMX28_UART
927 default 0x808c0000 if ARCH_EP93XX
928 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
929 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
930 default 0xc0013000 if DEBUG_U300_UART
931 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
932 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
933 default 0xd0012000 if DEBUG_MVEBU_UART
934 default 0xd4017000 if DEBUG_MMP_UART2
935 default 0xd4018000 if DEBUG_MMP_UART3
936 default 0xf0000be0 if ARCH_EBSA110
937 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
938 default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
940 default 0xfe800000 if ARCH_IOP32X
941 default 0xffc02000 if DEBUG_SOCFPGA_UART
942 default 0xffd82340 if ARCH_IOP13XX
943 default 0xfff36000 if DEBUG_HIGHBANK_UART
944 default 0xfffff700 if ARCH_IOP33X
945 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
946 DEBUG_UART_8250 || DEBUG_UART_PL01X
948 config DEBUG_UART_VIRT
949 hex "Virtual base address of debug UART"
950 default 0xe0010fe0 if ARCH_RPC
951 default 0xf0000be0 if ARCH_EBSA110
952 default 0xf0009000 if DEBUG_CNS3XXX
953 default 0xf01fb000 if DEBUG_NOMADIK_UART
954 default 0xf0201000 if DEBUG_BCM2835
955 default 0xf11f1000 if ARCH_VERSATILE
956 default 0xf1600000 if ARCH_INTEGRATOR
957 default 0xf1c28000 if DEBUG_SUNXI_UART0
958 default 0xf1c28400 if DEBUG_SUNXI_UART1
959 default 0xf2100000 if DEBUG_PXA_UART1
960 default 0xf4090000 if ARCH_LPC32XX
961 default 0xf4200000 if ARCH_GEMINI
962 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
963 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
964 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
965 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
966 default 0xfd012000 if ARCH_MV78XX0
967 default 0xfde12000 if ARCH_DOVE
968 default 0xfe012000 if ARCH_ORION5X
969 default 0xfe017000 if DEBUG_MMP_UART2
970 default 0xfe018000 if DEBUG_MMP_UART3
971 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
972 default 0xfe230000 if DEBUG_PICOXCELL_UART
973 default 0xfe800000 if ARCH_IOP32X
974 default 0xfeb24000 if DEBUG_RK3X_UART0
975 default 0xfeb26000 if DEBUG_RK3X_UART1
976 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
977 default 0xfed60000 if DEBUG_RK29_UART0
978 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
979 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
980 default 0xfec02000 if DEBUG_SOCFPGA_UART
981 default 0xfed12000 if ARCH_KIRKWOOD
982 default 0xfedc0000 if ARCH_EP93XX
983 default 0xfee003f8 if FOOTBRIDGE
984 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
985 default 0xfee36000 if DEBUG_HIGHBANK_UART
986 default 0xfee82340 if ARCH_IOP13XX
987 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
988 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
989 default 0xfefff700 if ARCH_IOP33X
990 default 0xff003000 if DEBUG_U300_UART
991 default DEBUG_UART_PHYS if !MMU
992 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
993 DEBUG_UART_8250 || DEBUG_UART_PL01X
995 config DEBUG_UART_8250_SHIFT
996 int "Register offset shift for the 8250 debug UART"
997 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
998 default 0 if FOOTBRIDGE || ARCH_IOP32X
1001 config DEBUG_UART_8250_WORD
1002 bool "Use 32-bit accesses for 8250 UART"
1003 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1004 depends on DEBUG_UART_8250_SHIFT >= 2
1005 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART
1007 config DEBUG_UART_8250_FLOW_CONTROL
1008 bool "Enable flow control for 8250 UART"
1009 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1010 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
1012 config DEBUG_UNCOMPRESS
1014 depends on ARCH_MULTIPLATFORM
1015 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
1018 This option influences the normal decompressor output for
1019 multiplatform kernels. Normally, multiplatform kernels disable
1020 decompressor output because it is not possible to know where to
1021 send the decompressor output.
1023 When this option is set, the selected DEBUG_LL output method
1024 will be re-used for normal decompressor output on multiplatform
1028 config UNCOMPRESS_INCLUDE
1030 default "debug/uncompress.h" if ARCH_MULTIPLATFORM
1031 default "mach/uncompress.h"
1037 Say Y here if you want to have an early console using the
1038 kernel low-level debugging functions. Add earlyprintk to your
1039 kernel parameters to enable this console.
1042 bool "On-chip ETM and ETB"
1045 Enables the on-chip embedded trace macrocell and embedded trace
1046 buffer driver that will allow you to collect traces of the
1049 config ARM_KPROBES_TEST
1050 tristate "Kprobes test module"
1051 depends on KPROBES && MODULES
1053 Perform tests of kprobes API and instruction set simulation.
1055 config PID_IN_CONTEXTIDR
1056 bool "Write the current PID to the CONTEXTIDR register"
1057 depends on CPU_COPY_V6
1059 Enabling this option causes the kernel to write the current PID to
1060 the PROCID field of the CONTEXTIDR register, at the expense of some
1061 additional instructions during context switch. Say Y here only if you
1062 are planning to use hardware trace tools with this kernel.