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_BERLIN_UART
98 bool "Marvell Berlin SoC Debug UART"
99 depends on ARCH_BERLIN
100 select DEBUG_UART_8250
102 Say Y here if you want kernel low-level debugging support
103 on Marvell Berlin SoC based platforms.
105 config DEBUG_CLPS711X_UART1
106 bool "Kernel low-level debugging messages via UART1"
107 depends on ARCH_CLPS711X
109 Say Y here if you want the debug print routines to direct
110 their output to the first serial port on these devices.
112 config DEBUG_CLPS711X_UART2
113 bool "Kernel low-level debugging messages via UART2"
114 depends on ARCH_CLPS711X
116 Say Y here if you want the debug print routines to direct
117 their output to the second serial port on these devices.
120 bool "Kernel Kernel low-level debugging on Cavium Networks CNS3xxx"
121 depends on ARCH_CNS3XXX
122 select DEBUG_UART_PL01X
124 Say Y here if you want the debug print routines to direct
125 their output to the CNS3xxx UART0.
127 config DEBUG_DAVINCI_DA8XX_UART1
128 bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
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 UART1 serial port on DaVinci DA8XX devices.
135 config DEBUG_DAVINCI_DA8XX_UART2
136 bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
137 depends on ARCH_DAVINCI_DA8XX
138 select DEBUG_UART_8250
140 Say Y here if you want the debug print routines to direct
141 their output to UART2 serial port on DaVinci DA8XX devices.
143 config DEBUG_DAVINCI_DMx_UART0
144 bool "Kernel low-level debugging on DaVinci DMx using UART0"
145 depends on ARCH_DAVINCI_DMx
146 select DEBUG_UART_8250
148 Say Y here if you want the debug print routines to direct
149 their output to UART0 serial port on DaVinci DMx devices.
151 config DEBUG_DAVINCI_TNETV107X_UART1
152 bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
153 depends on ARCH_DAVINCI_TNETV107X
154 select DEBUG_UART_8250
156 Say Y here if you want the debug print routines to direct
157 their output to UART1 serial port on DaVinci TNETV107X
160 config DEBUG_ZYNQ_UART0
161 bool "Kernel low-level debugging on Xilinx Zynq using UART0"
164 Say Y here if you want the debug print routines to direct
165 their output to UART0 on the Zynq platform.
167 config DEBUG_ZYNQ_UART1
168 bool "Kernel low-level debugging on Xilinx Zynq using UART1"
171 Say Y here if you want the debug print routines to direct
172 their output to UART1 on the Zynq platform.
174 If you have a ZC702 board and want early boot messages to
175 appear on the USB serial adaptor, select this option.
177 config DEBUG_DC21285_PORT
178 bool "Kernel low-level debugging messages via footbridge serial port"
179 depends on FOOTBRIDGE
181 Say Y here if you want the debug print routines to direct
182 their output to the serial port in the DC21285 (Footbridge).
184 config DEBUG_FOOTBRIDGE_COM1
185 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
186 depends on FOOTBRIDGE
188 Say Y here if you want the debug print routines to direct
189 their output to the 8250 at PCI COM1.
191 config DEBUG_HI3620_UART
192 bool "Hisilicon HI3620 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_HI3716_UART
200 bool "Hisilicon Hi3716 Debug UART"
201 depends on ARCH_HI3xxx
202 select DEBUG_UART_PL01X
204 Say Y here if you want kernel low-level debugging support
207 config DEBUG_HIGHBANK_UART
208 bool "Kernel low-level debugging messages via Highbank UART"
209 depends on ARCH_HIGHBANK
210 select DEBUG_UART_PL01X
212 Say Y here if you want the debug print routines to direct
213 their output to the UART on Highbank based devices.
215 config DEBUG_IMX1_UART
216 bool "i.MX1 Debug UART"
219 Say Y here if you want kernel low-level debugging support
222 config DEBUG_IMX23_UART
223 bool "i.MX23 Debug UART"
225 select DEBUG_UART_PL01X
227 Say Y here if you want kernel low-level debugging support
230 config DEBUG_IMX25_UART
231 bool "i.MX25 Debug UART"
234 Say Y here if you want kernel low-level debugging support
237 config DEBUG_IMX21_IMX27_UART
238 bool "i.MX21 and i.MX27 Debug UART"
239 depends on SOC_IMX21 || SOC_IMX27
241 Say Y here if you want kernel low-level debugging support
244 config DEBUG_IMX28_UART
245 bool "i.MX28 Debug UART"
247 select DEBUG_UART_PL01X
249 Say Y here if you want kernel low-level debugging support
252 config DEBUG_IMX31_UART
253 bool "i.MX31 Debug UART"
256 Say Y here if you want kernel low-level debugging support
259 config DEBUG_IMX35_UART
260 bool "i.MX35 Debug UART"
263 Say Y here if you want kernel low-level debugging support
266 config DEBUG_IMX51_UART
267 bool "i.MX51 Debug UART"
270 Say Y here if you want kernel low-level debugging support
273 config DEBUG_IMX53_UART
274 bool "i.MX53 Debug UART"
277 Say Y here if you want kernel low-level debugging support
280 config DEBUG_IMX6Q_UART
281 bool "i.MX6Q/DL Debug UART"
284 Say Y here if you want kernel low-level debugging support
287 config DEBUG_IMX6SL_UART
288 bool "i.MX6SL Debug UART"
289 depends on SOC_IMX6SL
291 Say Y here if you want kernel low-level debugging support
294 config DEBUG_KEYSTONE_UART0
295 bool "Kernel low-level debugging on KEYSTONE2 using UART0"
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 UART0 serial port on KEYSTONE2 devices.
302 config DEBUG_KEYSTONE_UART1
303 bool "Kernel low-level debugging on KEYSTONE2 using UART1"
304 depends on ARCH_KEYSTONE
305 select DEBUG_UART_8250
307 Say Y here if you want the debug print routines to direct
308 their output to UART1 serial port on KEYSTONE2 devices.
310 config DEBUG_MMP_UART2
311 bool "Kernel low-level debugging message via MMP UART2"
313 select DEBUG_UART_8250
315 Say Y here if you want kernel low-level debugging support
318 config DEBUG_MMP_UART3
319 bool "Kernel low-level debugging message via MMP UART3"
321 select DEBUG_UART_8250
323 Say Y here if you want kernel low-level debugging support
326 config DEBUG_MSM_UART1
327 bool "Kernel low-level debugging messages via MSM UART1"
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 first serial port on MSM devices.
334 config DEBUG_MSM_UART2
335 bool "Kernel low-level debugging messages via MSM UART2"
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 second serial port on MSM devices.
342 config DEBUG_MSM_UART3
343 bool "Kernel low-level debugging messages via MSM UART3"
344 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
345 select DEBUG_MSM_UART
347 Say Y here if you want the debug print routines to direct
348 their output to the third serial port on MSM devices.
350 config DEBUG_MSM8660_UART
351 bool "Kernel low-level debugging messages via MSM 8660 UART"
352 depends on ARCH_MSM8X60
353 select MSM_HAS_DEBUG_UART_HS
354 select DEBUG_MSM_UART
356 Say Y here if you want the debug print routines to direct
357 their output to the serial port on MSM 8660 devices.
359 config DEBUG_MSM8960_UART
360 bool "Kernel low-level debugging messages via MSM 8960 UART"
361 depends on ARCH_MSM8960
362 select MSM_HAS_DEBUG_UART_HS
363 select DEBUG_MSM_UART
365 Say Y here if you want the debug print routines to direct
366 their output to the serial port on MSM 8960 devices.
368 config DEBUG_MSM8974_UART
369 bool "Kernel low-level debugging messages via MSM 8974 UART"
370 depends on ARCH_MSM8974
371 select MSM_HAS_DEBUG_UART_HS
372 select DEBUG_MSM_UART
374 Say Y here if you want the debug print routines to direct
375 their output to the serial port on MSM 8974 devices.
377 config DEBUG_MVEBU_UART
378 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
379 depends on ARCH_MVEBU
380 select DEBUG_UART_8250
382 Say Y here if you want kernel low-level debugging support
383 on MVEBU based platforms.
385 This option should be used with the old bootloaders
386 that left the internal registers mapped at
387 0xd0000000. As of today, this is the case on
388 platforms such as the Globalscale Mirabox or the
389 Plathome OpenBlocks AX3, when using the original
392 If the wrong DEBUG_MVEBU_UART* option is selected,
393 when u-boot hands over to the kernel, the system
394 silently crashes, with no serial output at all.
396 config DEBUG_MVEBU_UART_ALTERNATE
397 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
398 depends on ARCH_MVEBU
399 select DEBUG_UART_8250
401 Say Y here if you want kernel low-level debugging support
402 on MVEBU based platforms.
404 This option should be used with the new bootloaders
405 that remap the internal registers at 0xf1000000.
407 If the wrong DEBUG_MVEBU_UART* option is selected,
408 when u-boot hands over to the kernel, the system
409 silently crashes, with no serial output at all.
415 Say Y here if you want kernel low-level debugging support
416 on Vybrid based platforms.
418 config DEBUG_NOMADIK_UART
419 bool "Kernel low-level debugging messages via NOMADIK UART"
420 depends on ARCH_NOMADIK
421 select DEBUG_UART_PL01X
423 Say Y here if you want kernel low-level debugging support
424 on NOMADIK based platforms.
426 config DEBUG_NSPIRE_CLASSIC_UART
427 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
428 depends on ARCH_NSPIRE
429 select DEBUG_UART_8250
431 Say Y here if you want kernel low-level debugging support
432 on TI-NSPIRE classic models.
434 config DEBUG_NSPIRE_CX_UART
435 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
436 depends on ARCH_NSPIRE
437 select DEBUG_UART_PL01X
439 Say Y here if you want kernel low-level debugging support
440 on TI-NSPIRE CX models.
442 config DEBUG_OMAP2UART1
443 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
444 depends on ARCH_OMAP2PLUS
445 select DEBUG_OMAP2PLUS_UART
447 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
448 omap3 torpedo and 3530 lv som.
450 config DEBUG_OMAP2UART2
451 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
452 depends on ARCH_OMAP2PLUS
453 select DEBUG_OMAP2PLUS_UART
455 config DEBUG_OMAP2UART3
456 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
457 depends on ARCH_OMAP2PLUS
458 select DEBUG_OMAP2PLUS_UART
460 config DEBUG_OMAP3UART3
461 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
462 depends on ARCH_OMAP2PLUS
463 select DEBUG_OMAP2PLUS_UART
465 This covers at least cm_t3x, beagle, crane, devkit8000,
466 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
469 config DEBUG_OMAP4UART3
470 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
471 depends on ARCH_OMAP2PLUS
472 select DEBUG_OMAP2PLUS_UART
474 config DEBUG_OMAP3UART4
475 bool "Kernel low-level debugging messages via OMAP36XX UART4"
476 depends on ARCH_OMAP2PLUS
477 select DEBUG_OMAP2PLUS_UART
479 config DEBUG_OMAP4UART4
480 bool "Kernel low-level debugging messages via OMAP4/5 UART4"
481 depends on ARCH_OMAP2PLUS
482 select DEBUG_OMAP2PLUS_UART
484 config DEBUG_TI81XXUART1
485 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
486 depends on ARCH_OMAP2PLUS
487 select DEBUG_OMAP2PLUS_UART
489 config DEBUG_TI81XXUART2
490 bool "Kernel low-level debugging messages via TI81XX UART2"
491 depends on ARCH_OMAP2PLUS
492 select DEBUG_OMAP2PLUS_UART
494 config DEBUG_TI81XXUART3
495 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
496 depends on ARCH_OMAP2PLUS
497 select DEBUG_OMAP2PLUS_UART
499 config DEBUG_AM33XXUART1
500 bool "Kernel low-level debugging messages via AM33XX UART1"
501 depends on ARCH_OMAP2PLUS
502 select DEBUG_OMAP2PLUS_UART
504 config DEBUG_ZOOM_UART
505 bool "Kernel low-level debugging messages via Zoom2/3 UART"
506 depends on ARCH_OMAP2PLUS
507 select DEBUG_OMAP2PLUS_UART
509 config DEBUG_PICOXCELL_UART
510 depends on ARCH_PICOXCELL
511 bool "Use PicoXcell UART for low-level debug"
512 select DEBUG_UART_8250
514 Say Y here if you want kernel low-level debugging support
515 on PicoXcell based platforms.
517 config DEBUG_PXA_UART1
519 bool "Use PXA UART1 for low-level debug"
520 select DEBUG_UART_8250
522 Say Y here if you want kernel low-level debugging support
525 config DEBUG_REALVIEW_STD_PORT
526 bool "RealView Default UART"
527 depends on ARCH_REALVIEW
528 select DEBUG_UART_PL01X
530 Say Y here if you want the debug print routines to direct
531 their output to the serial port on RealView EB, PB11MP, PBA8
534 config DEBUG_REALVIEW_PB1176_PORT
535 bool "RealView PB1176 UART"
536 depends on MACH_REALVIEW_PB1176
537 select DEBUG_UART_PL01X
539 Say Y here if you want the debug print routines to direct
540 their output to the standard serial port on the RealView
543 config DEBUG_RK29_UART0
544 bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
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_UART1
552 bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
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_RK29_UART2
560 bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
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_UART0
568 bool "Kernel low-level debugging messages via Rockchip RK3X UART0"
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_UART1
576 bool "Kernel low-level debugging messages via Rockchip RK3X UART1"
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_UART2
584 bool "Kernel low-level debugging messages via Rockchip RK3X UART2"
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_RK3X_UART3
592 bool "Kernel low-level debugging messages via Rockchip RK3X UART3"
593 depends on ARCH_ROCKCHIP
594 select DEBUG_UART_8250
596 Say Y here if you want kernel low-level debugging support
597 on Rockchip based platforms.
599 config DEBUG_S3C_UART0
600 depends on PLAT_SAMSUNG
601 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
602 bool "Use S3C UART 0 for low-level debug"
604 Say Y here if you want the debug print routines to direct
605 their output to UART 0. The port must have been initialised
606 by the boot-loader before use.
608 The uncompressor code port configuration is now handled
609 by CONFIG_S3C_LOWLEVEL_UART_PORT.
611 config DEBUG_S3C_UART1
612 depends on PLAT_SAMSUNG
613 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
614 bool "Use S3C UART 1 for low-level debug"
616 Say Y here if you want the debug print routines to direct
617 their output to UART 1. The port must have been initialised
618 by the boot-loader before use.
620 The uncompressor code port configuration is now handled
621 by CONFIG_S3C_LOWLEVEL_UART_PORT.
623 config DEBUG_S3C_UART2
624 depends on PLAT_SAMSUNG
625 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
626 bool "Use S3C UART 2 for low-level debug"
628 Say Y here if you want the debug print routines to direct
629 their output to UART 2. The port must have been initialised
630 by the boot-loader before use.
632 The uncompressor code port configuration is now handled
633 by CONFIG_S3C_LOWLEVEL_UART_PORT.
635 config DEBUG_S3C_UART3
636 depends on PLAT_SAMSUNG && ARCH_EXYNOS
637 select DEBUG_EXYNOS_UART
638 bool "Use S3C UART 3 for low-level debug"
640 Say Y here if you want the debug print routines to direct
641 their output to UART 3. The port must have been initialised
642 by the boot-loader before use.
644 The uncompressor code port configuration is now handled
645 by CONFIG_S3C_LOWLEVEL_UART_PORT.
647 config DEBUG_SOCFPGA_UART
648 depends on ARCH_SOCFPGA
649 bool "Use SOCFPGA UART for low-level debug"
650 select DEBUG_UART_8250
652 Say Y here if you want kernel low-level debugging support
653 on SOCFPGA based platforms.
655 config DEBUG_SUNXI_UART0
656 bool "Kernel low-level debugging messages via sunXi UART0"
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 UART0.
663 config DEBUG_SUNXI_UART1
664 bool "Kernel low-level debugging messages via sunXi UART1"
665 depends on ARCH_SUNXI
666 select DEBUG_UART_8250
668 Say Y here if you want kernel low-level debugging support
669 on Allwinner A1X based platforms on the UART1.
671 config TEGRA_DEBUG_UART_AUTO_ODMDATA
672 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
673 depends on ARCH_TEGRA
674 select DEBUG_TEGRA_UART
676 Automatically determines which UART to use for low-level
677 debug based on the ODMDATA value. This value is part of
678 the BCT, and is written to the boot memory device using
679 nvflash, or other flashing tool. When bits 19:18 are 3,
680 then bits 17:15 indicate which UART to use; 0/1/2/3/4
683 config TEGRA_DEBUG_UARTA
684 bool "Kernel low-level debugging messages via Tegra UART A"
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_UARTB
692 bool "Kernel low-level debugging messages via Tegra UART B"
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_UARTC
700 bool "Kernel low-level debugging messages via Tegra UART C"
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_UARTD
708 bool "Kernel low-level debugging messages via Tegra UART D"
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 TEGRA_DEBUG_UARTE
716 bool "Kernel low-level debugging messages via Tegra UART E"
717 depends on ARCH_TEGRA
718 select DEBUG_TEGRA_UART
720 Say Y here if you want kernel low-level debugging support
721 on Tegra based platforms.
723 config DEBUG_SIRFPRIMA2_UART1
724 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
725 depends on ARCH_PRIMA2
727 Say Y here if you want the debug print routines to direct
728 their output to the uart1 port on SiRFprimaII devices.
730 config DEBUG_SIRFMARCO_UART1
731 bool "Kernel low-level debugging messages via SiRFmarco UART1"
732 depends on ARCH_MARCO
734 Say Y here if you want the debug print routines to direct
735 their output to the uart1 port on SiRFmarco devices.
737 config STIH41X_DEBUG_ASC2
738 bool "Use StiH415/416 ASC2 UART for low-level debug"
740 select DEBUG_STI_UART
742 Say Y here if you want kernel low-level debugging support
743 on STiH415/416 based platforms like b2000, which has
744 default UART wired up to ASC2.
748 config STIH41X_DEBUG_SBC_ASC1
749 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
751 select DEBUG_STI_UART
753 Say Y here if you want kernel low-level debugging support
754 on STiH415/416 based platforms like b2020. which has
755 default UART wired up to SBC ASC1.
759 config DEBUG_U300_UART
760 bool "Kernel low-level debugging messages via U300 UART0"
762 select DEBUG_UART_PL01X
764 Say Y here if you want the debug print routines to direct
765 their output to the uart port on U300 devices.
767 config DEBUG_UX500_UART
768 depends on ARCH_U8500
769 bool "Use Ux500 UART for low-level debug"
771 Say Y here if you want kernel low-level debugging support
772 on Ux500 based platforms.
774 config DEBUG_VEXPRESS_UART0_DETECT
775 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
776 depends on ARCH_VEXPRESS && CPU_CP15_MMU
778 This option enables a simple heuristic which tries to determine
779 the motherboard's memory map variant (original or RS1) and then
780 choose the relevant UART0 base address.
782 Note that this will only work with standard A-class core tiles,
783 and may fail with non-standard SMM or custom software models.
785 config DEBUG_VEXPRESS_UART0_CA9
786 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
787 depends on ARCH_VEXPRESS
788 select DEBUG_UART_PL01X
790 This option selects UART0 at 0x10009000. Except for custom models,
791 this applies only to the V2P-CA9 tile.
793 config DEBUG_VEXPRESS_UART0_RS1
794 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
795 depends on ARCH_VEXPRESS
796 select DEBUG_UART_PL01X
798 This option selects UART0 at 0x1c090000. This applies to most
799 of the tiles using the RS1 memory map, including all new A-class
800 core tiles, FPGA-based SMMs and software models.
802 config DEBUG_VEXPRESS_UART0_CRX
803 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
804 depends on ARCH_VEXPRESS && !MMU
805 select DEBUG_UART_PL01X
807 This option selects UART0 at 0xb0090000. This is appropriate for
808 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
810 config DEBUG_VT8500_UART0
811 bool "Use UART0 on VIA/Wondermedia SoCs"
812 depends on ARCH_VT8500
814 This option selects UART0 on VIA/Wondermedia System-on-a-chip
815 devices, including VT8500, WM8505, WM8650 and WM8850.
817 config DEBUG_LL_UART_NONE
818 bool "No low-level debugging UART"
819 depends on !ARCH_MULTIPLATFORM
821 Say Y here if your platform doesn't provide a UART option
822 above. This relies on your platform choosing the right UART
823 definition internally in order for low-level debugging to
827 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
829 Say Y here if you want the debug print routines to direct
830 their output to the EmbeddedICE macrocell's DCC channel using
831 co-processor 14. This is known to work on the ARM9 style ICE
832 channel and on the XScale with the PEEDI.
834 Note that the system will appear to hang during boot if there
835 is nothing connected to read from the DCC.
837 config DEBUG_SEMIHOSTING
838 bool "Kernel low-level debug output via semihosting I/O"
840 Semihosting enables code running on an ARM target to use
841 the I/O facilities on a host debugger/emulator through a
842 simple SVC call. The host debugger or emulator must have
843 semihosting enabled for the special svc call to be trapped
844 otherwise the kernel will crash.
846 This is known to work with OpenOCD, as well as
847 ARM's Fast Models, or any other controlling environment
848 that implements semihosting.
850 For more details about semihosting, please see
851 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
853 config DEBUG_LL_UART_8250
854 bool "Kernel low-level debugging via 8250 UART"
856 Say Y here if you wish the debug print routes to direct
857 their output to an 8250 UART. You can use this option
858 to provide the parameters for the 8250 UART rather than
859 selecting one of the platform specific options above if
860 you know the parameters for the port.
862 This option is preferred over the platform specific
863 options; the platform specific options are deprecated
864 and will be soon removed.
866 config DEBUG_LL_UART_EFM32
867 bool "Kernel low-level debugging via efm32 UART"
868 depends on ARCH_EFM32
870 Say Y here if you want the debug print routines to direct
871 their output to an UART or USART port on efm32 based
872 machines. Use the following addresses for DEBUG_UART_PHYS:
880 config DEBUG_LL_UART_PL01X
881 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
883 Say Y here if you wish the debug print routes to direct
884 their output to a PL01x Primecell UART. You can use
885 this option to provide the parameters for the UART
886 rather than selecting one of the platform specific
887 options above if you know the parameters for the port.
889 This option is preferred over the platform specific
890 options; the platform specific options are deprecated
891 and will be soon removed.
895 config DEBUG_EXYNOS_UART
898 config DEBUG_OMAP2PLUS_UART
900 depends on ARCH_OMAP2PLUS
902 config DEBUG_IMX_UART_PORT
903 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
904 DEBUG_IMX25_UART || \
905 DEBUG_IMX21_IMX27_UART || \
906 DEBUG_IMX31_UART || \
907 DEBUG_IMX35_UART || \
908 DEBUG_IMX51_UART || \
909 DEBUG_IMX53_UART || \
910 DEBUG_IMX6Q_UART || \
915 Choose UART port on which kernel low-level debug messages
918 config DEBUG_TEGRA_UART
920 depends on ARCH_TEGRA
922 config DEBUG_STI_UART
926 config DEBUG_MSM_UART
930 config DEBUG_LL_INCLUDE
932 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
933 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
934 default "debug/exynos.S" if DEBUG_EXYNOS_UART
935 default "debug/efm32.S" if DEBUG_LL_UART_EFM32
936 default "debug/icedcc.S" if DEBUG_ICEDCC
937 default "debug/imx.S" if DEBUG_IMX1_UART || \
938 DEBUG_IMX25_UART || \
939 DEBUG_IMX21_IMX27_UART || \
940 DEBUG_IMX31_UART || \
941 DEBUG_IMX35_UART || \
942 DEBUG_IMX51_UART || \
944 DEBUG_IMX6Q_UART || \
946 default "debug/msm.S" if DEBUG_MSM_UART
947 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
948 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
949 default "debug/sti.S" if DEBUG_STI_UART
950 default "debug/tegra.S" if DEBUG_TEGRA_UART
951 default "debug/ux500.S" if DEBUG_UX500_UART
952 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
953 default "debug/vf.S" if DEBUG_VF_UART
954 default "debug/vt8500.S" if DEBUG_VT8500_UART0
955 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
956 default "mach/debug-macro.S"
958 # Compatibility options for PL01x
959 config DEBUG_UART_PL01X
960 def_bool ARCH_EP93XX || \
967 # Compatibility options for 8250
968 config DEBUG_UART_8250
969 def_bool ARCH_DOVE || ARCH_EBSA110 || \
970 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
971 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
972 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \
973 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
975 config DEBUG_UART_PHYS
976 hex "Physical base address of debug UART"
977 default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0
978 default 0x01c28000 if DEBUG_SUNXI_UART0
979 default 0x01c28400 if DEBUG_SUNXI_UART1
980 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1
981 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2
982 default 0x02530c00 if DEBUG_KEYSTONE_UART0
983 default 0x02531000 if DEBUG_KEYSTONE_UART1
984 default 0x03010fe0 if ARCH_RPC
985 default 0x08108300 if DEBUG_DAVINCI_TNETV107X_UART1
986 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
987 DEBUG_VEXPRESS_UART0_CA9
988 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
989 default 0x10124000 if DEBUG_RK3X_UART0
990 default 0x10126000 if DEBUG_RK3X_UART1
991 default 0x101f1000 if ARCH_VERSATILE
992 default 0x101fb000 if DEBUG_NOMADIK_UART
993 default 0x16000000 if ARCH_INTEGRATOR
994 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
995 default 0x20060000 if DEBUG_RK29_UART0
996 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
997 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
998 default 0x20201000 if DEBUG_BCM2835
999 default 0x4000e400 if DEBUG_LL_UART_EFM32
1000 default 0x40090000 if ARCH_LPC32XX
1001 default 0x40100000 if DEBUG_PXA_UART1
1002 default 0x42000000 if ARCH_GEMINI
1003 default 0x7c0003f8 if FOOTBRIDGE
1004 default 0x80230000 if DEBUG_PICOXCELL_UART
1005 default 0x80070000 if DEBUG_IMX23_UART
1006 default 0x80074000 if DEBUG_IMX28_UART
1007 default 0x808c0000 if ARCH_EP93XX
1008 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1009 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
1010 default 0xc0013000 if DEBUG_U300_UART
1011 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1012 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1013 default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1014 default 0xd0012000 if DEBUG_MVEBU_UART
1015 default 0xd4017000 if DEBUG_MMP_UART2
1016 default 0xd4018000 if DEBUG_MMP_UART3
1017 default 0xe0000000 if ARCH_SPEAR13XX
1018 default 0xf0000be0 if ARCH_EBSA110
1019 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
1020 default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
1022 default 0xf7fc9000 if DEBUG_BERLIN_UART
1023 default 0xf8b00000 if DEBUG_HI3716_UART
1024 default 0xfcb00000 if DEBUG_HI3620_UART
1025 default 0xfe800000 if ARCH_IOP32X
1026 default 0xffc02000 if DEBUG_SOCFPGA_UART
1027 default 0xffd82340 if ARCH_IOP13XX
1028 default 0xfff36000 if DEBUG_HIGHBANK_UART
1029 default 0xfffff700 if ARCH_IOP33X
1030 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1031 DEBUG_LL_UART_EFM32 || \
1032 DEBUG_UART_8250 || DEBUG_UART_PL01X
1034 config DEBUG_UART_VIRT
1035 hex "Virtual base address of debug UART"
1036 default 0xe0010fe0 if ARCH_RPC
1037 default 0xf0000be0 if ARCH_EBSA110
1038 default 0xf0009000 if DEBUG_CNS3XXX
1039 default 0xf01fb000 if DEBUG_NOMADIK_UART
1040 default 0xf0201000 if DEBUG_BCM2835
1041 default 0xf11f1000 if ARCH_VERSATILE
1042 default 0xf1600000 if ARCH_INTEGRATOR
1043 default 0xf1c28000 if DEBUG_SUNXI_UART0
1044 default 0xf1c28400 if DEBUG_SUNXI_UART1
1045 default 0xf2100000 if DEBUG_PXA_UART1
1046 default 0xf4090000 if ARCH_LPC32XX
1047 default 0xf4200000 if ARCH_GEMINI
1048 default 0xf7fc9000 if DEBUG_BERLIN_UART
1049 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
1050 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
1051 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
1052 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
1053 default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1054 default 0xfd000000 if ARCH_SPEAR13XX
1055 default 0xfd012000 if ARCH_MV78XX0
1056 default 0xfde12000 if ARCH_DOVE
1057 default 0xfe012000 if ARCH_ORION5X
1058 default 0xfe017000 if DEBUG_MMP_UART2
1059 default 0xfe018000 if DEBUG_MMP_UART3
1060 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
1061 default 0xfe230000 if DEBUG_PICOXCELL_UART
1062 default 0xfe800000 if ARCH_IOP32X
1063 default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HI3716_UART
1064 default 0xfeb24000 if DEBUG_RK3X_UART0
1065 default 0xfeb26000 if DEBUG_RK3X_UART1
1066 default 0xfeb30c00 if DEBUG_KEYSTONE_UART0
1067 default 0xfeb31000 if DEBUG_KEYSTONE_UART1
1068 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
1069 default 0xfed60000 if DEBUG_RK29_UART0
1070 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1071 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1072 default 0xfec02000 if DEBUG_SOCFPGA_UART
1073 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0
1074 default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1
1075 default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2
1076 default 0xfed12000 if ARCH_KIRKWOOD
1077 default 0xfedc0000 if ARCH_EP93XX
1078 default 0xfee003f8 if FOOTBRIDGE
1079 default 0xfee08300 if DEBUG_DAVINCI_TNETV107X_UART1
1080 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1081 default 0xfef36000 if DEBUG_HIGHBANK_UART
1082 default 0xfee82340 if ARCH_IOP13XX
1083 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1084 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1085 default 0xfefff700 if ARCH_IOP33X
1086 default 0xff003000 if DEBUG_U300_UART
1087 default DEBUG_UART_PHYS if !MMU
1088 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1089 DEBUG_UART_8250 || DEBUG_UART_PL01X
1091 config DEBUG_UART_8250_SHIFT
1092 int "Register offset shift for the 8250 debug UART"
1093 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1094 default 0 if FOOTBRIDGE || ARCH_IOP32X
1097 config DEBUG_UART_8250_WORD
1098 bool "Use 32-bit accesses for 8250 UART"
1099 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1100 depends on DEBUG_UART_8250_SHIFT >= 2
1101 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
1103 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
1104 DEBUG_DAVINCI_DA8XX_UART2 || DEBUG_DAVINCI_TNETV107X_UART1
1106 config DEBUG_UART_8250_FLOW_CONTROL
1107 bool "Enable flow control for 8250 UART"
1108 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1109 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
1111 config DEBUG_UNCOMPRESS
1113 depends on ARCH_MULTIPLATFORM || ARCH_MSM
1114 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
1115 (!DEBUG_TEGRA_UART || !ZBOOT_ROM)
1117 This option influences the normal decompressor output for
1118 multiplatform kernels. Normally, multiplatform kernels disable
1119 decompressor output because it is not possible to know where to
1120 send the decompressor output.
1122 When this option is set, the selected DEBUG_LL output method
1123 will be re-used for normal decompressor output on multiplatform
1127 config UNCOMPRESS_INCLUDE
1129 default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM
1130 default "mach/uncompress.h"
1136 Say Y here if you want to have an early console using the
1137 kernel low-level debugging functions. Add earlyprintk to your
1138 kernel parameters to enable this console.
1141 bool "On-chip ETM and ETB"
1144 Enables the on-chip embedded trace macrocell and embedded trace
1145 buffer driver that will allow you to collect traces of the
1148 config ARM_KPROBES_TEST
1149 tristate "Kprobes test module"
1150 depends on KPROBES && MODULES
1152 Perform tests of kprobes API and instruction set simulation.
1154 config PID_IN_CONTEXTIDR
1155 bool "Write the current PID to the CONTEXTIDR register"
1156 depends on CPU_COPY_V6
1158 Enabling this option causes the kernel to write the current PID to
1159 the PROCID field of the CONTEXTIDR register, at the expense of some
1160 additional instructions during context switch. Say Y here only if you
1161 are planning to use hardware trace tools with this kernel.