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.
393 Say Y here if you want kernel low-level debugging support
394 on Vybrid based platforms.
396 config DEBUG_NOMADIK_UART
397 bool "Kernel low-level debugging messages via NOMADIK UART"
398 depends on ARCH_NOMADIK
399 select DEBUG_UART_PL01X
401 Say Y here if you want kernel low-level debugging support
402 on NOMADIK based platforms.
404 config DEBUG_NSPIRE_CLASSIC_UART
405 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
406 depends on ARCH_NSPIRE
407 select DEBUG_UART_8250
409 Say Y here if you want kernel low-level debugging support
410 on TI-NSPIRE classic models.
412 config DEBUG_NSPIRE_CX_UART
413 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
414 depends on ARCH_NSPIRE
415 select DEBUG_UART_PL01X
417 Say Y here if you want kernel low-level debugging support
418 on TI-NSPIRE CX models.
420 config DEBUG_OMAP2UART1
421 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
422 depends on ARCH_OMAP2PLUS
423 select DEBUG_OMAP2PLUS_UART
425 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
426 omap3 torpedo and 3530 lv som.
428 config DEBUG_OMAP2UART2
429 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
430 depends on ARCH_OMAP2PLUS
431 select DEBUG_OMAP2PLUS_UART
433 config DEBUG_OMAP2UART3
434 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
435 depends on ARCH_OMAP2PLUS
436 select DEBUG_OMAP2PLUS_UART
438 config DEBUG_OMAP3UART3
439 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
440 depends on ARCH_OMAP2PLUS
441 select DEBUG_OMAP2PLUS_UART
443 This covers at least cm_t3x, beagle, crane, devkit8000,
444 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
447 config DEBUG_OMAP4UART3
448 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
449 depends on ARCH_OMAP2PLUS
450 select DEBUG_OMAP2PLUS_UART
452 config DEBUG_OMAP3UART4
453 bool "Kernel low-level debugging messages via OMAP36XX UART4"
454 depends on ARCH_OMAP2PLUS
455 select DEBUG_OMAP2PLUS_UART
457 config DEBUG_OMAP4UART4
458 bool "Kernel low-level debugging messages via OMAP4/5 UART4"
459 depends on ARCH_OMAP2PLUS
460 select DEBUG_OMAP2PLUS_UART
462 config DEBUG_TI81XXUART1
463 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
464 depends on ARCH_OMAP2PLUS
465 select DEBUG_OMAP2PLUS_UART
467 config DEBUG_TI81XXUART2
468 bool "Kernel low-level debugging messages via TI81XX UART2"
469 depends on ARCH_OMAP2PLUS
470 select DEBUG_OMAP2PLUS_UART
472 config DEBUG_TI81XXUART3
473 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
474 depends on ARCH_OMAP2PLUS
475 select DEBUG_OMAP2PLUS_UART
477 config DEBUG_AM33XXUART1
478 bool "Kernel low-level debugging messages via AM33XX UART1"
479 depends on ARCH_OMAP2PLUS
480 select DEBUG_OMAP2PLUS_UART
482 config DEBUG_ZOOM_UART
483 bool "Kernel low-level debugging messages via Zoom2/3 UART"
484 depends on ARCH_OMAP2PLUS
485 select DEBUG_OMAP2PLUS_UART
487 config DEBUG_PICOXCELL_UART
488 depends on ARCH_PICOXCELL
489 bool "Use PicoXcell UART for low-level debug"
490 select DEBUG_UART_8250
492 Say Y here if you want kernel low-level debugging support
493 on PicoXcell based platforms.
495 config DEBUG_PXA_UART1
497 bool "Use PXA UART1 for low-level debug"
498 select DEBUG_UART_8250
500 Say Y here if you want kernel low-level debugging support
503 config DEBUG_REALVIEW_STD_PORT
504 bool "RealView Default UART"
505 depends on ARCH_REALVIEW
506 select DEBUG_UART_PL01X
508 Say Y here if you want the debug print routines to direct
509 their output to the serial port on RealView EB, PB11MP, PBA8
512 config DEBUG_REALVIEW_PB1176_PORT
513 bool "RealView PB1176 UART"
514 depends on MACH_REALVIEW_PB1176
515 select DEBUG_UART_PL01X
517 Say Y here if you want the debug print routines to direct
518 their output to the standard serial port on the RealView
521 config DEBUG_RK29_UART0
522 bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
523 depends on ARCH_ROCKCHIP
524 select DEBUG_UART_8250
526 Say Y here if you want kernel low-level debugging support
527 on Rockchip based platforms.
529 config DEBUG_RK29_UART1
530 bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
531 depends on ARCH_ROCKCHIP
532 select DEBUG_UART_8250
534 Say Y here if you want kernel low-level debugging support
535 on Rockchip based platforms.
537 config DEBUG_RK29_UART2
538 bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
539 depends on ARCH_ROCKCHIP
540 select DEBUG_UART_8250
542 Say Y here if you want kernel low-level debugging support
543 on Rockchip based platforms.
545 config DEBUG_RK3X_UART0
546 bool "Kernel low-level debugging messages via Rockchip RK3X UART0"
547 depends on ARCH_ROCKCHIP
548 select DEBUG_UART_8250
550 Say Y here if you want kernel low-level debugging support
551 on Rockchip based platforms.
553 config DEBUG_RK3X_UART1
554 bool "Kernel low-level debugging messages via Rockchip RK3X UART1"
555 depends on ARCH_ROCKCHIP
556 select DEBUG_UART_8250
558 Say Y here if you want kernel low-level debugging support
559 on Rockchip based platforms.
561 config DEBUG_RK3X_UART2
562 bool "Kernel low-level debugging messages via Rockchip RK3X UART2"
563 depends on ARCH_ROCKCHIP
564 select DEBUG_UART_8250
566 Say Y here if you want kernel low-level debugging support
567 on Rockchip based platforms.
569 config DEBUG_RK3X_UART3
570 bool "Kernel low-level debugging messages via Rockchip RK3X UART3"
571 depends on ARCH_ROCKCHIP
572 select DEBUG_UART_8250
574 Say Y here if you want kernel low-level debugging support
575 on Rockchip based platforms.
577 config DEBUG_S3C_UART0
578 depends on PLAT_SAMSUNG
579 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
580 bool "Use S3C UART 0 for low-level debug"
582 Say Y here if you want the debug print routines to direct
583 their output to UART 0. The port must have been initialised
584 by the boot-loader before use.
586 The uncompressor code port configuration is now handled
587 by CONFIG_S3C_LOWLEVEL_UART_PORT.
589 config DEBUG_S3C_UART1
590 depends on PLAT_SAMSUNG
591 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
592 bool "Use S3C UART 1 for low-level debug"
594 Say Y here if you want the debug print routines to direct
595 their output to UART 1. The port must have been initialised
596 by the boot-loader before use.
598 The uncompressor code port configuration is now handled
599 by CONFIG_S3C_LOWLEVEL_UART_PORT.
601 config DEBUG_S3C_UART2
602 depends on PLAT_SAMSUNG
603 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
604 bool "Use S3C UART 2 for low-level debug"
606 Say Y here if you want the debug print routines to direct
607 their output to UART 2. The port must have been initialised
608 by the boot-loader before use.
610 The uncompressor code port configuration is now handled
611 by CONFIG_S3C_LOWLEVEL_UART_PORT.
613 config DEBUG_S3C_UART3
614 depends on PLAT_SAMSUNG && ARCH_EXYNOS
615 select DEBUG_EXYNOS_UART
616 bool "Use S3C UART 3 for low-level debug"
618 Say Y here if you want the debug print routines to direct
619 their output to UART 3. The port must have been initialised
620 by the boot-loader before use.
622 The uncompressor code port configuration is now handled
623 by CONFIG_S3C_LOWLEVEL_UART_PORT.
625 config DEBUG_SOCFPGA_UART
626 depends on ARCH_SOCFPGA
627 bool "Use SOCFPGA UART for low-level debug"
628 select DEBUG_UART_8250
630 Say Y here if you want kernel low-level debugging support
631 on SOCFPGA based platforms.
633 config DEBUG_SUNXI_UART0
634 bool "Kernel low-level debugging messages via sunXi UART0"
635 depends on ARCH_SUNXI
636 select DEBUG_UART_8250
638 Say Y here if you want kernel low-level debugging support
639 on Allwinner A1X based platforms on the UART0.
641 config DEBUG_SUNXI_UART1
642 bool "Kernel low-level debugging messages via sunXi UART1"
643 depends on ARCH_SUNXI
644 select DEBUG_UART_8250
646 Say Y here if you want kernel low-level debugging support
647 on Allwinner A1X based platforms on the UART1.
649 config TEGRA_DEBUG_UART_AUTO_ODMDATA
650 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
651 depends on ARCH_TEGRA
652 select DEBUG_TEGRA_UART
654 Automatically determines which UART to use for low-level
655 debug based on the ODMDATA value. This value is part of
656 the BCT, and is written to the boot memory device using
657 nvflash, or other flashing tool. When bits 19:18 are 3,
658 then bits 17:15 indicate which UART to use; 0/1/2/3/4
661 config TEGRA_DEBUG_UARTA
662 bool "Kernel low-level debugging messages via Tegra UART A"
663 depends on ARCH_TEGRA
664 select DEBUG_TEGRA_UART
666 Say Y here if you want kernel low-level debugging support
667 on Tegra based platforms.
669 config TEGRA_DEBUG_UARTB
670 bool "Kernel low-level debugging messages via Tegra UART B"
671 depends on ARCH_TEGRA
672 select DEBUG_TEGRA_UART
674 Say Y here if you want kernel low-level debugging support
675 on Tegra based platforms.
677 config TEGRA_DEBUG_UARTC
678 bool "Kernel low-level debugging messages via Tegra UART C"
679 depends on ARCH_TEGRA
680 select DEBUG_TEGRA_UART
682 Say Y here if you want kernel low-level debugging support
683 on Tegra based platforms.
685 config TEGRA_DEBUG_UARTD
686 bool "Kernel low-level debugging messages via Tegra UART D"
687 depends on ARCH_TEGRA
688 select DEBUG_TEGRA_UART
690 Say Y here if you want kernel low-level debugging support
691 on Tegra based platforms.
693 config TEGRA_DEBUG_UARTE
694 bool "Kernel low-level debugging messages via Tegra UART E"
695 depends on ARCH_TEGRA
696 select DEBUG_TEGRA_UART
698 Say Y here if you want kernel low-level debugging support
699 on Tegra based platforms.
701 config DEBUG_SIRFPRIMA2_UART1
702 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
703 depends on ARCH_PRIMA2
705 Say Y here if you want the debug print routines to direct
706 their output to the uart1 port on SiRFprimaII devices.
708 config DEBUG_SIRFMARCO_UART1
709 bool "Kernel low-level debugging messages via SiRFmarco UART1"
710 depends on ARCH_MARCO
712 Say Y here if you want the debug print routines to direct
713 their output to the uart1 port on SiRFmarco devices.
715 config STIH41X_DEBUG_ASC2
716 bool "Use StiH415/416 ASC2 UART for low-level debug"
718 select DEBUG_STI_UART
720 Say Y here if you want kernel low-level debugging support
721 on STiH415/416 based platforms like b2000, which has
722 default UART wired up to ASC2.
726 config STIH41X_DEBUG_SBC_ASC1
727 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
729 select DEBUG_STI_UART
731 Say Y here if you want kernel low-level debugging support
732 on STiH415/416 based platforms like b2020. which has
733 default UART wired up to SBC ASC1.
737 config DEBUG_U300_UART
738 bool "Kernel low-level debugging messages via U300 UART0"
740 select DEBUG_UART_PL01X
742 Say Y here if you want the debug print routines to direct
743 their output to the uart port on U300 devices.
745 config DEBUG_UX500_UART
746 depends on ARCH_U8500
747 bool "Use Ux500 UART for low-level debug"
749 Say Y here if you want kernel low-level debugging support
750 on Ux500 based platforms.
752 config DEBUG_VEXPRESS_UART0_DETECT
753 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
754 depends on ARCH_VEXPRESS && CPU_CP15_MMU
756 This option enables a simple heuristic which tries to determine
757 the motherboard's memory map variant (original or RS1) and then
758 choose the relevant UART0 base address.
760 Note that this will only work with standard A-class core tiles,
761 and may fail with non-standard SMM or custom software models.
763 config DEBUG_VEXPRESS_UART0_CA9
764 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
765 depends on ARCH_VEXPRESS
766 select DEBUG_UART_PL01X
768 This option selects UART0 at 0x10009000. Except for custom models,
769 this applies only to the V2P-CA9 tile.
771 config DEBUG_VEXPRESS_UART0_RS1
772 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
773 depends on ARCH_VEXPRESS
774 select DEBUG_UART_PL01X
776 This option selects UART0 at 0x1c090000. This applies to most
777 of the tiles using the RS1 memory map, including all new A-class
778 core tiles, FPGA-based SMMs and software models.
780 config DEBUG_VEXPRESS_UART0_CRX
781 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
782 depends on ARCH_VEXPRESS && !MMU
783 select DEBUG_UART_PL01X
785 This option selects UART0 at 0xb0090000. This is appropriate for
786 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
788 config DEBUG_VT8500_UART0
789 bool "Use UART0 on VIA/Wondermedia SoCs"
790 depends on ARCH_VT8500
792 This option selects UART0 on VIA/Wondermedia System-on-a-chip
793 devices, including VT8500, WM8505, WM8650 and WM8850.
795 config DEBUG_LL_UART_NONE
796 bool "No low-level debugging UART"
797 depends on !ARCH_MULTIPLATFORM
799 Say Y here if your platform doesn't provide a UART option
800 above. This relies on your platform choosing the right UART
801 definition internally in order for low-level debugging to
805 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
807 Say Y here if you want the debug print routines to direct
808 their output to the EmbeddedICE macrocell's DCC channel using
809 co-processor 14. This is known to work on the ARM9 style ICE
810 channel and on the XScale with the PEEDI.
812 Note that the system will appear to hang during boot if there
813 is nothing connected to read from the DCC.
815 config DEBUG_SEMIHOSTING
816 bool "Kernel low-level debug output via semihosting I/O"
818 Semihosting enables code running on an ARM target to use
819 the I/O facilities on a host debugger/emulator through a
820 simple SVC call. The host debugger or emulator must have
821 semihosting enabled for the special svc call to be trapped
822 otherwise the kernel will crash.
824 This is known to work with OpenOCD, as well as
825 ARM's Fast Models, or any other controlling environment
826 that implements semihosting.
828 For more details about semihosting, please see
829 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
831 config DEBUG_LL_UART_8250
832 bool "Kernel low-level debugging via 8250 UART"
834 Say Y here if you wish the debug print routes to direct
835 their output to an 8250 UART. You can use this option
836 to provide the parameters for the 8250 UART rather than
837 selecting one of the platform specific options above if
838 you know the parameters for the port.
840 This option is preferred over the platform specific
841 options; the platform specific options are deprecated
842 and will be soon removed.
844 config DEBUG_LL_UART_PL01X
845 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
847 Say Y here if you wish the debug print routes to direct
848 their output to a PL01x Primecell UART. You can use
849 this option to provide the parameters for the UART
850 rather than selecting one of the platform specific
851 options above if you know the parameters for the port.
853 This option is preferred over the platform specific
854 options; the platform specific options are deprecated
855 and will be soon removed.
859 config DEBUG_EXYNOS_UART
862 config DEBUG_OMAP2PLUS_UART
864 depends on ARCH_OMAP2PLUS
866 config DEBUG_IMX_UART_PORT
867 int "i.MX Debug UART Port Selection" 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 || \
873 DEBUG_IMX53_UART || \
874 DEBUG_IMX6Q_UART || \
879 Choose UART port on which kernel low-level debug messages
882 config DEBUG_TEGRA_UART
884 depends on ARCH_TEGRA
886 config DEBUG_STI_UART
890 config DEBUG_LL_INCLUDE
892 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
893 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
894 default "debug/exynos.S" if DEBUG_EXYNOS_UART
895 default "debug/icedcc.S" if DEBUG_ICEDCC
896 default "debug/imx.S" if DEBUG_IMX1_UART || \
897 DEBUG_IMX25_UART || \
898 DEBUG_IMX21_IMX27_UART || \
899 DEBUG_IMX31_UART || \
900 DEBUG_IMX35_UART || \
901 DEBUG_IMX51_UART || \
903 DEBUG_IMX6Q_UART || \
905 default "debug/msm.S" if DEBUG_MSM_UART1 || \
908 DEBUG_MSM8660_UART || \
910 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
911 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
912 default "debug/sti.S" if DEBUG_STI_UART
913 default "debug/tegra.S" if DEBUG_TEGRA_UART
914 default "debug/ux500.S" if DEBUG_UX500_UART
915 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
916 default "debug/vf.S" if DEBUG_VF_UART
917 default "debug/vt8500.S" if DEBUG_VT8500_UART0
918 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
919 default "mach/debug-macro.S"
921 # Compatibility options for PL01x
922 config DEBUG_UART_PL01X
923 def_bool ARCH_EP93XX || \
930 # Compatibility options for 8250
931 config DEBUG_UART_8250
932 def_bool ARCH_DOVE || ARCH_EBSA110 || \
933 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
934 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
935 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \
936 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
938 config DEBUG_UART_PHYS
939 hex "Physical base address of debug UART"
940 default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0
941 default 0x01c28000 if DEBUG_SUNXI_UART0
942 default 0x01c28400 if DEBUG_SUNXI_UART1
943 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1
944 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2
945 default 0x02530c00 if DEBUG_KEYSTONE_UART0
946 default 0x02531000 if DEBUG_KEYSTONE_UART1
947 default 0x03010fe0 if ARCH_RPC
948 default 0x08108300 if DEBUG_DAVINCI_TNETV107X_UART1
949 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
950 DEBUG_VEXPRESS_UART0_CA9
951 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
952 default 0x10124000 if DEBUG_RK3X_UART0
953 default 0x10126000 if DEBUG_RK3X_UART1
954 default 0x101f1000 if ARCH_VERSATILE
955 default 0x101fb000 if DEBUG_NOMADIK_UART
956 default 0x16000000 if ARCH_INTEGRATOR
957 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
958 default 0x20060000 if DEBUG_RK29_UART0
959 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
960 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
961 default 0x20201000 if DEBUG_BCM2835
962 default 0x40090000 if ARCH_LPC32XX
963 default 0x40100000 if DEBUG_PXA_UART1
964 default 0x42000000 if ARCH_GEMINI
965 default 0x7c0003f8 if FOOTBRIDGE
966 default 0x80230000 if DEBUG_PICOXCELL_UART
967 default 0x80070000 if DEBUG_IMX23_UART
968 default 0x80074000 if DEBUG_IMX28_UART
969 default 0x808c0000 if ARCH_EP93XX
970 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
971 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
972 default 0xc0013000 if DEBUG_U300_UART
973 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
974 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
975 default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
976 default 0xd0012000 if DEBUG_MVEBU_UART
977 default 0xd4017000 if DEBUG_MMP_UART2
978 default 0xd4018000 if DEBUG_MMP_UART3
979 default 0xe0000000 if ARCH_SPEAR13XX
980 default 0xf0000be0 if ARCH_EBSA110
981 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
982 default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
984 default 0xf8b00000 if DEBUG_HI3716_UART
985 default 0xfcb00000 if DEBUG_HI3620_UART
986 default 0xfe800000 if ARCH_IOP32X
987 default 0xffc02000 if DEBUG_SOCFPGA_UART
988 default 0xffd82340 if ARCH_IOP13XX
989 default 0xfff36000 if DEBUG_HIGHBANK_UART
990 default 0xfffff700 if ARCH_IOP33X
991 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
992 DEBUG_UART_8250 || DEBUG_UART_PL01X
994 config DEBUG_UART_VIRT
995 hex "Virtual base address of debug UART"
996 default 0xe0010fe0 if ARCH_RPC
997 default 0xf0000be0 if ARCH_EBSA110
998 default 0xf0009000 if DEBUG_CNS3XXX
999 default 0xf01fb000 if DEBUG_NOMADIK_UART
1000 default 0xf0201000 if DEBUG_BCM2835
1001 default 0xf11f1000 if ARCH_VERSATILE
1002 default 0xf1600000 if ARCH_INTEGRATOR
1003 default 0xf1c28000 if DEBUG_SUNXI_UART0
1004 default 0xf1c28400 if DEBUG_SUNXI_UART1
1005 default 0xf2100000 if DEBUG_PXA_UART1
1006 default 0xf4090000 if ARCH_LPC32XX
1007 default 0xf4200000 if ARCH_GEMINI
1008 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
1009 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
1010 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
1011 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
1012 default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1013 default 0xfd000000 if ARCH_SPEAR13XX
1014 default 0xfd012000 if ARCH_MV78XX0
1015 default 0xfde12000 if ARCH_DOVE
1016 default 0xfe012000 if ARCH_ORION5X
1017 default 0xfe017000 if DEBUG_MMP_UART2
1018 default 0xfe018000 if DEBUG_MMP_UART3
1019 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
1020 default 0xfe230000 if DEBUG_PICOXCELL_UART
1021 default 0xfe800000 if ARCH_IOP32X
1022 default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HI3716_UART
1023 default 0xfeb24000 if DEBUG_RK3X_UART0
1024 default 0xfeb26000 if DEBUG_RK3X_UART1
1025 default 0xfeb30c00 if DEBUG_KEYSTONE_UART0
1026 default 0xfeb31000 if DEBUG_KEYSTONE_UART1
1027 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
1028 default 0xfed60000 if DEBUG_RK29_UART0
1029 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1030 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1031 default 0xfec02000 if DEBUG_SOCFPGA_UART
1032 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0
1033 default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1
1034 default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2
1035 default 0xfed12000 if ARCH_KIRKWOOD
1036 default 0xfedc0000 if ARCH_EP93XX
1037 default 0xfee003f8 if FOOTBRIDGE
1038 default 0xfee08300 if DEBUG_DAVINCI_TNETV107X_UART1
1039 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1040 default 0xfef36000 if DEBUG_HIGHBANK_UART
1041 default 0xfee82340 if ARCH_IOP13XX
1042 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1043 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1044 default 0xfefff700 if ARCH_IOP33X
1045 default 0xff003000 if DEBUG_U300_UART
1046 default DEBUG_UART_PHYS if !MMU
1047 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1048 DEBUG_UART_8250 || DEBUG_UART_PL01X
1050 config DEBUG_UART_8250_SHIFT
1051 int "Register offset shift for the 8250 debug UART"
1052 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1053 default 0 if FOOTBRIDGE || ARCH_IOP32X
1056 config DEBUG_UART_8250_WORD
1057 bool "Use 32-bit accesses for 8250 UART"
1058 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1059 depends on DEBUG_UART_8250_SHIFT >= 2
1060 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
1062 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
1063 DEBUG_DAVINCI_DA8XX_UART2 || DEBUG_DAVINCI_TNETV107X_UART1
1065 config DEBUG_UART_8250_FLOW_CONTROL
1066 bool "Enable flow control for 8250 UART"
1067 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1068 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
1070 config DEBUG_UNCOMPRESS
1072 depends on ARCH_MULTIPLATFORM || ARCH_MSM
1073 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
1074 (!DEBUG_TEGRA_UART || !ZBOOT_ROM)
1076 This option influences the normal decompressor output for
1077 multiplatform kernels. Normally, multiplatform kernels disable
1078 decompressor output because it is not possible to know where to
1079 send the decompressor output.
1081 When this option is set, the selected DEBUG_LL output method
1082 will be re-used for normal decompressor output on multiplatform
1086 config UNCOMPRESS_INCLUDE
1088 default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM
1089 default "mach/uncompress.h"
1095 Say Y here if you want to have an early console using the
1096 kernel low-level debugging functions. Add earlyprintk to your
1097 kernel parameters to enable this console.
1100 bool "On-chip ETM and ETB"
1103 Enables the on-chip embedded trace macrocell and embedded trace
1104 buffer driver that will allow you to collect traces of the
1107 config ARM_KPROBES_TEST
1108 tristate "Kprobes test module"
1109 depends on KPROBES && MODULES
1111 Perform tests of kprobes API and instruction set simulation.
1113 config PID_IN_CONTEXTIDR
1114 bool "Write the current PID to the CONTEXTIDR register"
1115 depends on CPU_COPY_V6
1117 Enabling this option causes the kernel to write the current PID to
1118 the PROCID field of the CONTEXTIDR register, at the expense of some
1119 additional instructions during context switch. Say Y here only if you
1120 are planning to use hardware trace tools with this kernel.