3 source "lib/Kconfig.debug"
6 bool "Export kernel pagetable layout to userspace via debugfs"
7 depends on DEBUG_KERNEL
10 Say Y here if you want to show the kernel pagetable layout in a
11 debugfs file. This information is only useful for kernel developers
12 who are working in architecture specific areas of the kernel.
13 It is probably not a good idea to enable this feature in a production
18 bool "Filter access to /dev/mem"
21 If this option is disabled, you allow userspace (root) access to all
22 of memory, including kernel and userspace memory. Accidental
23 access to this is obviously disastrous, but specific access can
24 be used by people debugging the kernel.
26 If this option is switched on, the /dev/mem file only allows
27 userspace access to memory mapped peripherals.
31 # RMK wants arm kernels compiled with frame pointers or stack unwinding.
32 # If you know what you are doing and are willing to live without stack
33 # traces, you can get a slightly smaller kernel by setting this option to
34 # n, but then RMK will have to kill you ;).
37 depends on !THUMB2_KERNEL
38 default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
40 If you say N here, the resulting kernel will be slightly smaller and
41 faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
42 when a problem occurs with the kernel, the information that is
43 reported is severely limited.
46 bool "Enable stack unwinding support (EXPERIMENTAL)"
50 This option enables stack unwinding support in the kernel
51 using the information automatically generated by the
52 compiler. The resulting kernel image is slightly bigger but
53 the performance is not affected. Currently, this feature
54 only works with EABI compilers. If unsure say Y.
58 depends on FUNCTION_TRACER && FRAME_POINTER
62 bool "Verbose user fault messages"
64 When a user program crashes due to an exception, the kernel can
65 print a brief message explaining what the problem was. This is
66 sometimes helpful for debugging but serves no purpose on a
67 production system. Most people should say N here.
69 In addition, you need to pass user_debug=N on the kernel command
70 line to enable this feature. N consists of the sum of:
72 1 - undefined instruction events
74 4 - invalid data aborts
78 # These options are only for real kernel hackers who want to get their hands dirty.
80 bool "Kernel low-level debugging functions (read help!)"
81 depends on DEBUG_KERNEL
83 Say Y here to include definitions of printascii, printch, printhex
84 in the kernel. This is helpful if you are debugging code that
85 executes before the console is initialized.
87 Note that selecting this option will limit the kernel to a single
88 UART definition, as specified below. Attempting to boot the kernel
89 image on a different platform *will not work*, so this option should
90 not be enabled for kernels that are intended to be portable.
93 prompt "Kernel low-level debugging port"
96 config AT91_DEBUG_LL_DBGU0
97 bool "Kernel low-level debugging on rm9200, 9260/9g20, 9261/9g10 and 9rl"
98 depends on HAVE_AT91_DBGU0
100 config AT91_DEBUG_LL_DBGU1
101 bool "Kernel low-level debugging on 9263 and 9g45"
102 depends on HAVE_AT91_DBGU1
105 bool "Kernel low-level debugging on BCM2835 PL011 UART"
106 depends on ARCH_BCM2835
107 select DEBUG_UART_PL01X
109 config DEBUG_BCM_KONA_UART
110 bool "Kernel low-level debugging messages via BCM KONA UART"
112 select DEBUG_UART_8250
114 Say Y here if you want kernel low-level debugging support
115 on Broadcom SoC platforms.
116 This low level debug works for Broadcom
117 mobile SoCs in the Kona family of chips (e.g. bcm28155,
120 config DEBUG_BERLIN_UART
121 bool "Marvell Berlin SoC Debug UART"
122 depends on ARCH_BERLIN
123 select DEBUG_UART_8250
125 Say Y here if you want kernel low-level debugging support
126 on Marvell Berlin SoC based platforms.
128 config DEBUG_CLPS711X_UART1
129 bool "Kernel low-level debugging messages via UART1"
130 depends on ARCH_CLPS711X
132 Say Y here if you want the debug print routines to direct
133 their output to the first serial port on these devices.
135 config DEBUG_CLPS711X_UART2
136 bool "Kernel low-level debugging messages via UART2"
137 depends on ARCH_CLPS711X
139 Say Y here if you want the debug print routines to direct
140 their output to the second serial port on these devices.
143 bool "Kernel Kernel low-level debugging on Cavium Networks CNS3xxx"
144 depends on ARCH_CNS3XXX
145 select DEBUG_UART_PL01X
147 Say Y here if you want the debug print routines to direct
148 their output to the CNS3xxx UART0.
150 config DEBUG_DAVINCI_DA8XX_UART1
151 bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
152 depends on ARCH_DAVINCI_DA8XX
153 select DEBUG_UART_8250
155 Say Y here if you want the debug print routines to direct
156 their output to UART1 serial port on DaVinci DA8XX devices.
158 config DEBUG_DAVINCI_DA8XX_UART2
159 bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
160 depends on ARCH_DAVINCI_DA8XX
161 select DEBUG_UART_8250
163 Say Y here if you want the debug print routines to direct
164 their output to UART2 serial port on DaVinci DA8XX devices.
166 config DEBUG_DAVINCI_DMx_UART0
167 bool "Kernel low-level debugging on DaVinci DMx using UART0"
168 depends on ARCH_DAVINCI_DMx
169 select DEBUG_UART_8250
171 Say Y here if you want the debug print routines to direct
172 their output to UART0 serial port on DaVinci DMx devices.
174 config DEBUG_DAVINCI_TNETV107X_UART1
175 bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
176 depends on ARCH_DAVINCI_TNETV107X
177 select DEBUG_UART_8250
179 Say Y here if you want the debug print routines to direct
180 their output to UART1 serial port on DaVinci TNETV107X
183 config DEBUG_ZYNQ_UART0
184 bool "Kernel low-level debugging on Xilinx Zynq using UART0"
187 Say Y here if you want the debug print routines to direct
188 their output to UART0 on the Zynq platform.
190 config DEBUG_ZYNQ_UART1
191 bool "Kernel low-level debugging on Xilinx Zynq using UART1"
194 Say Y here if you want the debug print routines to direct
195 their output to UART1 on the Zynq platform.
197 If you have a ZC702 board and want early boot messages to
198 appear on the USB serial adaptor, select this option.
200 config DEBUG_DC21285_PORT
201 bool "Kernel low-level debugging messages via footbridge serial port"
202 depends on FOOTBRIDGE
204 Say Y here if you want the debug print routines to direct
205 their output to the serial port in the DC21285 (Footbridge).
207 config DEBUG_FOOTBRIDGE_COM1
208 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
209 depends on FOOTBRIDGE
211 Say Y here if you want the debug print routines to direct
212 their output to the 8250 at PCI COM1.
214 config DEBUG_HI3620_UART
215 bool "Hisilicon HI3620 Debug UART"
216 depends on ARCH_HI3xxx
217 select DEBUG_UART_PL01X
219 Say Y here if you want kernel low-level debugging support
222 config DEBUG_HI3716_UART
223 bool "Hisilicon Hi3716 Debug UART"
224 depends on ARCH_HI3xxx
225 select DEBUG_UART_PL01X
227 Say Y here if you want kernel low-level debugging support
230 config DEBUG_HIGHBANK_UART
231 bool "Kernel low-level debugging messages via Highbank UART"
232 depends on ARCH_HIGHBANK
233 select DEBUG_UART_PL01X
235 Say Y here if you want the debug print routines to direct
236 their output to the UART on Highbank based devices.
238 config DEBUG_IMX1_UART
239 bool "i.MX1 Debug UART"
242 Say Y here if you want kernel low-level debugging support
245 config DEBUG_IMX23_UART
246 bool "i.MX23 Debug UART"
248 select DEBUG_UART_PL01X
250 Say Y here if you want kernel low-level debugging support
253 config DEBUG_IMX25_UART
254 bool "i.MX25 Debug UART"
257 Say Y here if you want kernel low-level debugging support
260 config DEBUG_IMX21_IMX27_UART
261 bool "i.MX21 and i.MX27 Debug UART"
262 depends on SOC_IMX21 || SOC_IMX27
264 Say Y here if you want kernel low-level debugging support
267 config DEBUG_IMX28_UART
268 bool "i.MX28 Debug UART"
270 select DEBUG_UART_PL01X
272 Say Y here if you want kernel low-level debugging support
275 config DEBUG_IMX31_UART
276 bool "i.MX31 Debug UART"
279 Say Y here if you want kernel low-level debugging support
282 config DEBUG_IMX35_UART
283 bool "i.MX35 Debug UART"
286 Say Y here if you want kernel low-level debugging support
289 config DEBUG_IMX50_UART
290 bool "i.MX50 Debug UART"
293 Say Y here if you want kernel low-level debugging support
296 config DEBUG_IMX51_UART
297 bool "i.MX51 Debug UART"
300 Say Y here if you want kernel low-level debugging support
303 config DEBUG_IMX53_UART
304 bool "i.MX53 Debug UART"
307 Say Y here if you want kernel low-level debugging support
310 config DEBUG_IMX6Q_UART
311 bool "i.MX6Q/DL Debug UART"
314 Say Y here if you want kernel low-level debugging support
317 config DEBUG_IMX6SL_UART
318 bool "i.MX6SL Debug UART"
319 depends on SOC_IMX6SL
321 Say Y here if you want kernel low-level debugging support
324 config DEBUG_KEYSTONE_UART0
325 bool "Kernel low-level debugging on KEYSTONE2 using UART0"
326 depends on ARCH_KEYSTONE
327 select DEBUG_UART_8250
329 Say Y here if you want the debug print routines to direct
330 their output to UART0 serial port on KEYSTONE2 devices.
332 config DEBUG_KEYSTONE_UART1
333 bool "Kernel low-level debugging on KEYSTONE2 using UART1"
334 depends on ARCH_KEYSTONE
335 select DEBUG_UART_8250
337 Say Y here if you want the debug print routines to direct
338 their output to UART1 serial port on KEYSTONE2 devices.
340 config DEBUG_MMP_UART2
341 bool "Kernel low-level debugging message via MMP UART2"
343 select DEBUG_UART_8250
345 Say Y here if you want kernel low-level debugging support
348 config DEBUG_MMP_UART3
349 bool "Kernel low-level debugging message via MMP UART3"
351 select DEBUG_UART_8250
353 Say Y here if you want kernel low-level debugging support
356 config DEBUG_MSM_UART1
357 bool "Kernel low-level debugging messages via MSM UART1"
358 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
359 select DEBUG_MSM_UART
361 Say Y here if you want the debug print routines to direct
362 their output to the first serial port on MSM devices.
364 config DEBUG_MSM_UART2
365 bool "Kernel low-level debugging messages via MSM UART2"
366 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
367 select DEBUG_MSM_UART
369 Say Y here if you want the debug print routines to direct
370 their output to the second serial port on MSM devices.
372 config DEBUG_MSM_UART3
373 bool "Kernel low-level debugging messages via MSM UART3"
374 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
375 select DEBUG_MSM_UART
377 Say Y here if you want the debug print routines to direct
378 their output to the third serial port on MSM devices.
380 config DEBUG_MSM8660_UART
381 bool "Kernel low-level debugging messages via MSM 8660 UART"
382 depends on ARCH_MSM8X60
383 select MSM_HAS_DEBUG_UART_HS
384 select DEBUG_MSM_UART
386 Say Y here if you want the debug print routines to direct
387 their output to the serial port on MSM 8660 devices.
389 config DEBUG_MSM8960_UART
390 bool "Kernel low-level debugging messages via MSM 8960 UART"
391 depends on ARCH_MSM8960
392 select MSM_HAS_DEBUG_UART_HS
393 select DEBUG_MSM_UART
395 Say Y here if you want the debug print routines to direct
396 their output to the serial port on MSM 8960 devices.
398 config DEBUG_MSM8974_UART
399 bool "Kernel low-level debugging messages via MSM 8974 UART"
400 depends on ARCH_MSM8974
401 select MSM_HAS_DEBUG_UART_HS
402 select DEBUG_MSM_UART
404 Say Y here if you want the debug print routines to direct
405 their output to the serial port on MSM 8974 devices.
407 config DEBUG_MVEBU_UART
408 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
409 depends on ARCH_MVEBU
410 select DEBUG_UART_8250
412 Say Y here if you want kernel low-level debugging support
413 on MVEBU based platforms.
415 This option should be used with the old bootloaders
416 that left the internal registers mapped at
417 0xd0000000. As of today, this is the case on
418 platforms such as the Globalscale Mirabox or the
419 Plathome OpenBlocks AX3, when using the original
422 If the wrong DEBUG_MVEBU_UART* option is selected,
423 when u-boot hands over to the kernel, the system
424 silently crashes, with no serial output at all.
426 config DEBUG_MVEBU_UART_ALTERNATE
427 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
428 depends on ARCH_MVEBU
429 select DEBUG_UART_8250
431 Say Y here if you want kernel low-level debugging support
432 on MVEBU based platforms.
434 This option should be used with the new bootloaders
435 that remap the internal registers at 0xf1000000.
437 If the wrong DEBUG_MVEBU_UART* option is selected,
438 when u-boot hands over to the kernel, the system
439 silently crashes, with no serial output at all.
445 Say Y here if you want kernel low-level debugging support
446 on Vybrid based platforms.
448 config DEBUG_NOMADIK_UART
449 bool "Kernel low-level debugging messages via NOMADIK UART"
450 depends on ARCH_NOMADIK
451 select DEBUG_UART_PL01X
453 Say Y here if you want kernel low-level debugging support
454 on NOMADIK based platforms.
456 config DEBUG_NSPIRE_CLASSIC_UART
457 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
458 depends on ARCH_NSPIRE
459 select DEBUG_UART_8250
461 Say Y here if you want kernel low-level debugging support
462 on TI-NSPIRE classic models.
464 config DEBUG_NSPIRE_CX_UART
465 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
466 depends on ARCH_NSPIRE
467 select DEBUG_UART_PL01X
469 Say Y here if you want kernel low-level debugging support
470 on TI-NSPIRE CX models.
472 config DEBUG_OMAP2UART1
473 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
474 depends on ARCH_OMAP2PLUS
475 select DEBUG_OMAP2PLUS_UART
477 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
478 omap3 torpedo and 3530 lv som.
480 config DEBUG_OMAP2UART2
481 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
482 depends on ARCH_OMAP2PLUS
483 select DEBUG_OMAP2PLUS_UART
485 config DEBUG_OMAP2UART3
486 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
487 depends on ARCH_OMAP2PLUS
488 select DEBUG_OMAP2PLUS_UART
490 config DEBUG_OMAP3UART3
491 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
492 depends on ARCH_OMAP2PLUS
493 select DEBUG_OMAP2PLUS_UART
495 This covers at least cm_t3x, beagle, crane, devkit8000,
496 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
499 config DEBUG_OMAP4UART3
500 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
501 depends on ARCH_OMAP2PLUS
502 select DEBUG_OMAP2PLUS_UART
504 config DEBUG_OMAP3UART4
505 bool "Kernel low-level debugging messages via OMAP36XX UART4"
506 depends on ARCH_OMAP2PLUS
507 select DEBUG_OMAP2PLUS_UART
509 config DEBUG_OMAP4UART4
510 bool "Kernel low-level debugging messages via OMAP4/5 UART4"
511 depends on ARCH_OMAP2PLUS
512 select DEBUG_OMAP2PLUS_UART
514 config DEBUG_TI81XXUART1
515 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
516 depends on ARCH_OMAP2PLUS
517 select DEBUG_OMAP2PLUS_UART
519 config DEBUG_TI81XXUART2
520 bool "Kernel low-level debugging messages via TI81XX UART2"
521 depends on ARCH_OMAP2PLUS
522 select DEBUG_OMAP2PLUS_UART
524 config DEBUG_TI81XXUART3
525 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
526 depends on ARCH_OMAP2PLUS
527 select DEBUG_OMAP2PLUS_UART
529 config DEBUG_AM33XXUART1
530 bool "Kernel low-level debugging messages via AM33XX UART1"
531 depends on ARCH_OMAP2PLUS
532 select DEBUG_OMAP2PLUS_UART
534 config DEBUG_ZOOM_UART
535 bool "Kernel low-level debugging messages via Zoom2/3 UART"
536 depends on ARCH_OMAP2PLUS
537 select DEBUG_OMAP2PLUS_UART
539 config DEBUG_PICOXCELL_UART
540 depends on ARCH_PICOXCELL
541 bool "Use PicoXcell UART for low-level debug"
542 select DEBUG_UART_8250
544 Say Y here if you want kernel low-level debugging support
545 on PicoXcell based platforms.
547 config DEBUG_PXA_UART1
549 bool "Use PXA UART1 for low-level debug"
550 select DEBUG_UART_8250
552 Say Y here if you want kernel low-level debugging support
555 config DEBUG_REALVIEW_STD_PORT
556 bool "RealView Default UART"
557 depends on ARCH_REALVIEW
558 select DEBUG_UART_PL01X
560 Say Y here if you want the debug print routines to direct
561 their output to the serial port on RealView EB, PB11MP, PBA8
564 config DEBUG_REALVIEW_PB1176_PORT
565 bool "RealView PB1176 UART"
566 depends on MACH_REALVIEW_PB1176
567 select DEBUG_UART_PL01X
569 Say Y here if you want the debug print routines to direct
570 their output to the standard serial port on the RealView
573 config DEBUG_RK29_UART0
574 bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
575 depends on ARCH_ROCKCHIP
576 select DEBUG_UART_8250
578 Say Y here if you want kernel low-level debugging support
579 on Rockchip based platforms.
581 config DEBUG_RK29_UART1
582 bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
583 depends on ARCH_ROCKCHIP
584 select DEBUG_UART_8250
586 Say Y here if you want kernel low-level debugging support
587 on Rockchip based platforms.
589 config DEBUG_RK29_UART2
590 bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
591 depends on ARCH_ROCKCHIP
592 select DEBUG_UART_8250
594 Say Y here if you want kernel low-level debugging support
595 on Rockchip based platforms.
597 config DEBUG_RK3X_UART0
598 bool "Kernel low-level debugging messages via Rockchip RK3X UART0"
599 depends on ARCH_ROCKCHIP
600 select DEBUG_UART_8250
602 Say Y here if you want kernel low-level debugging support
603 on Rockchip based platforms.
605 config DEBUG_RK3X_UART1
606 bool "Kernel low-level debugging messages via Rockchip RK3X UART1"
607 depends on ARCH_ROCKCHIP
608 select DEBUG_UART_8250
610 Say Y here if you want kernel low-level debugging support
611 on Rockchip based platforms.
613 config DEBUG_RK3X_UART2
614 bool "Kernel low-level debugging messages via Rockchip RK3X UART2"
615 depends on ARCH_ROCKCHIP
616 select DEBUG_UART_8250
618 Say Y here if you want kernel low-level debugging support
619 on Rockchip based platforms.
621 config DEBUG_RK3X_UART3
622 bool "Kernel low-level debugging messages via Rockchip RK3X UART3"
623 depends on ARCH_ROCKCHIP
624 select DEBUG_UART_8250
626 Say Y here if you want kernel low-level debugging support
627 on Rockchip based platforms.
629 config DEBUG_R7S72100_SCIF2
630 bool "Kernel low-level debugging messages via SCIF2 on R7S72100"
631 depends on ARCH_R7S72100
633 Say Y here if you want kernel low-level debugging support
634 via SCIF2 on Renesas RZ/A1H (R7S72100).
636 config DEBUG_RCAR_GEN1_SCIF0
637 bool "Kernel low-level debugging messages via SCIF0 on R8A7778"
638 depends on ARCH_R8A7778
640 Say Y here if you want kernel low-level debugging support
641 via SCIF0 on Renesas R-Car M1A (R8A7778).
643 config DEBUG_RCAR_GEN1_SCIF2
644 bool "Kernel low-level debugging messages via SCIF2 on R8A7779"
645 depends on ARCH_R8A7779
647 Say Y here if you want kernel low-level debugging support
648 via SCIF2 on Renesas R-Car H1 (R8A7779).
650 config DEBUG_RCAR_GEN2_SCIF0
651 bool "Kernel low-level debugging messages via SCIF0 on R8A7790/R8A7791/R8A7793)"
652 depends on ARCH_R8A7790 || ARCH_R8A7791 || ARCH_R8A7793
654 Say Y here if you want kernel low-level debugging support
655 via SCIF0 on Renesas R-Car H2 (R8A7790), M2-W (R8A7791), or
658 config DEBUG_RCAR_GEN2_SCIF2
659 bool "Kernel low-level debugging messages via SCIF2 on R8A7794"
660 depends on ARCH_R8A7794
662 Say Y here if you want kernel low-level debugging support
663 via SCIF2 on Renesas R-Car E2 (R8A7794).
665 config DEBUG_RMOBILE_SCIFA0
666 bool "Kernel low-level debugging messages via SCIFA0 on R8A73A4/SH7372"
667 depends on ARCH_R8A73A4 || ARCH_SH7372
669 Say Y here if you want kernel low-level debugging support
670 via SCIFA0 on Renesas R-Mobile APE6 (R8A73A4) or SH-Mobile
673 config DEBUG_RMOBILE_SCIFA1
674 bool "Kernel low-level debugging messages via SCIFA1 on R8A7740"
675 depends on ARCH_R8A7740
677 Say Y here if you want kernel low-level debugging support
678 via SCIFA1 on Renesas R-Mobile A1 (R8A7740).
680 config DEBUG_RMOBILE_SCIFA4
681 bool "Kernel low-level debugging messages via SCIFA4 on SH73A0"
682 depends on ARCH_SH73A0
684 Say Y here if you want kernel low-level debugging support
685 via SCIFA4 on Renesas SH-Mobile AG5 (SH73A0).
687 config DEBUG_S3C_UART0
688 depends on PLAT_SAMSUNG
689 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
690 bool "Use S3C UART 0 for low-level debug"
692 Say Y here if you want the debug print routines to direct
693 their output to UART 0. The port must have been initialised
694 by the boot-loader before use.
696 The uncompressor code port configuration is now handled
697 by CONFIG_S3C_LOWLEVEL_UART_PORT.
699 config DEBUG_S3C_UART1
700 depends on PLAT_SAMSUNG
701 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
702 bool "Use S3C UART 1 for low-level debug"
704 Say Y here if you want the debug print routines to direct
705 their output to UART 1. The port must have been initialised
706 by the boot-loader before use.
708 The uncompressor code port configuration is now handled
709 by CONFIG_S3C_LOWLEVEL_UART_PORT.
711 config DEBUG_S3C_UART2
712 depends on PLAT_SAMSUNG
713 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
714 bool "Use S3C UART 2 for low-level debug"
716 Say Y here if you want the debug print routines to direct
717 their output to UART 2. The port must have been initialised
718 by the boot-loader before use.
720 The uncompressor code port configuration is now handled
721 by CONFIG_S3C_LOWLEVEL_UART_PORT.
723 config DEBUG_S3C_UART3
724 depends on PLAT_SAMSUNG && ARCH_EXYNOS
725 select DEBUG_EXYNOS_UART
726 bool "Use S3C UART 3 for low-level debug"
728 Say Y here if you want the debug print routines to direct
729 their output to UART 3. The port must have been initialised
730 by the boot-loader before use.
732 The uncompressor code port configuration is now handled
733 by CONFIG_S3C_LOWLEVEL_UART_PORT.
735 config DEBUG_SOCFPGA_UART
736 depends on ARCH_SOCFPGA
737 bool "Use SOCFPGA UART for low-level debug"
738 select DEBUG_UART_8250
740 Say Y here if you want kernel low-level debugging support
741 on SOCFPGA based platforms.
743 config DEBUG_SUNXI_UART0
744 bool "Kernel low-level debugging messages via sunXi UART0"
745 depends on ARCH_SUNXI
746 select DEBUG_UART_8250
748 Say Y here if you want kernel low-level debugging support
749 on Allwinner A1X based platforms on the UART0.
751 config DEBUG_SUNXI_UART1
752 bool "Kernel low-level debugging messages via sunXi UART1"
753 depends on ARCH_SUNXI
754 select DEBUG_UART_8250
756 Say Y here if you want kernel low-level debugging support
757 on Allwinner A1X based platforms on the UART1.
759 config TEGRA_DEBUG_UART_AUTO_ODMDATA
760 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
761 depends on ARCH_TEGRA
762 select DEBUG_TEGRA_UART
764 Automatically determines which UART to use for low-level
765 debug based on the ODMDATA value. This value is part of
766 the BCT, and is written to the boot memory device using
767 nvflash, or other flashing tool. When bits 19:18 are 3,
768 then bits 17:15 indicate which UART to use; 0/1/2/3/4
771 config TEGRA_DEBUG_UARTA
772 bool "Kernel low-level debugging messages via Tegra UART A"
773 depends on ARCH_TEGRA
774 select DEBUG_TEGRA_UART
776 Say Y here if you want kernel low-level debugging support
777 on Tegra based platforms.
779 config TEGRA_DEBUG_UARTB
780 bool "Kernel low-level debugging messages via Tegra UART B"
781 depends on ARCH_TEGRA
782 select DEBUG_TEGRA_UART
784 Say Y here if you want kernel low-level debugging support
785 on Tegra based platforms.
787 config TEGRA_DEBUG_UARTC
788 bool "Kernel low-level debugging messages via Tegra UART C"
789 depends on ARCH_TEGRA
790 select DEBUG_TEGRA_UART
792 Say Y here if you want kernel low-level debugging support
793 on Tegra based platforms.
795 config TEGRA_DEBUG_UARTD
796 bool "Kernel low-level debugging messages via Tegra UART D"
797 depends on ARCH_TEGRA
798 select DEBUG_TEGRA_UART
800 Say Y here if you want kernel low-level debugging support
801 on Tegra based platforms.
803 config TEGRA_DEBUG_UARTE
804 bool "Kernel low-level debugging messages via Tegra UART E"
805 depends on ARCH_TEGRA
806 select DEBUG_TEGRA_UART
808 Say Y here if you want kernel low-level debugging support
809 on Tegra based platforms.
811 config DEBUG_SIRFPRIMA2_UART1
812 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
813 depends on ARCH_PRIMA2
815 Say Y here if you want the debug print routines to direct
816 their output to the uart1 port on SiRFprimaII devices.
818 config DEBUG_SIRFMARCO_UART1
819 bool "Kernel low-level debugging messages via SiRFmarco UART1"
820 depends on ARCH_MARCO
822 Say Y here if you want the debug print routines to direct
823 their output to the uart1 port on SiRFmarco devices.
825 config STIH41X_DEBUG_ASC2
826 bool "Use StiH415/416 ASC2 UART for low-level debug"
828 select DEBUG_STI_UART
830 Say Y here if you want kernel low-level debugging support
831 on STiH415/416 based platforms like b2000, which has
832 default UART wired up to ASC2.
836 config STIH41X_DEBUG_SBC_ASC1
837 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
839 select DEBUG_STI_UART
841 Say Y here if you want kernel low-level debugging support
842 on STiH415/416 based platforms like b2020. which has
843 default UART wired up to SBC ASC1.
847 config DEBUG_U300_UART
848 bool "Kernel low-level debugging messages via U300 UART0"
850 select DEBUG_UART_PL01X
852 Say Y here if you want the debug print routines to direct
853 their output to the uart port on U300 devices.
855 config DEBUG_UX500_UART
856 depends on ARCH_U8500
857 bool "Use Ux500 UART for low-level debug"
859 Say Y here if you want kernel low-level debugging support
860 on Ux500 based platforms.
862 config DEBUG_VEXPRESS_UART0_DETECT
863 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
864 depends on ARCH_VEXPRESS && CPU_CP15_MMU
866 This option enables a simple heuristic which tries to determine
867 the motherboard's memory map variant (original or RS1) and then
868 choose the relevant UART0 base address.
870 Note that this will only work with standard A-class core tiles,
871 and may fail with non-standard SMM or custom software models.
873 config DEBUG_VEXPRESS_UART0_CA9
874 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
875 depends on ARCH_VEXPRESS
876 select DEBUG_UART_PL01X
878 This option selects UART0 at 0x10009000. Except for custom models,
879 this applies only to the V2P-CA9 tile.
881 config DEBUG_VEXPRESS_UART0_RS1
882 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
883 depends on ARCH_VEXPRESS
884 select DEBUG_UART_PL01X
886 This option selects UART0 at 0x1c090000. This applies to most
887 of the tiles using the RS1 memory map, including all new A-class
888 core tiles, FPGA-based SMMs and software models.
890 config DEBUG_VEXPRESS_UART0_CRX
891 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
892 depends on ARCH_VEXPRESS && !MMU
893 select DEBUG_UART_PL01X
895 This option selects UART0 at 0xb0090000. This is appropriate for
896 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
898 config DEBUG_VT8500_UART0
899 bool "Use UART0 on VIA/Wondermedia SoCs"
900 depends on ARCH_VT8500
902 This option selects UART0 on VIA/Wondermedia System-on-a-chip
903 devices, including VT8500, WM8505, WM8650 and WM8850.
905 config DEBUG_LL_UART_NONE
906 bool "No low-level debugging UART"
907 depends on !ARCH_MULTIPLATFORM
909 Say Y here if your platform doesn't provide a UART option
910 above. This relies on your platform choosing the right UART
911 definition internally in order for low-level debugging to
915 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
917 Say Y here if you want the debug print routines to direct
918 their output to the EmbeddedICE macrocell's DCC channel using
919 co-processor 14. This is known to work on the ARM9 style ICE
920 channel and on the XScale with the PEEDI.
922 Note that the system will appear to hang during boot if there
923 is nothing connected to read from the DCC.
925 config DEBUG_SEMIHOSTING
926 bool "Kernel low-level debug output via semihosting I/O"
928 Semihosting enables code running on an ARM target to use
929 the I/O facilities on a host debugger/emulator through a
930 simple SVC call. The host debugger or emulator must have
931 semihosting enabled for the special svc call to be trapped
932 otherwise the kernel will crash.
934 This is known to work with OpenOCD, as well as
935 ARM's Fast Models, or any other controlling environment
936 that implements semihosting.
938 For more details about semihosting, please see
939 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
941 config DEBUG_LL_UART_8250
942 bool "Kernel low-level debugging via 8250 UART"
944 Say Y here if you wish the debug print routes to direct
945 their output to an 8250 UART. You can use this option
946 to provide the parameters for the 8250 UART rather than
947 selecting one of the platform specific options above if
948 you know the parameters for the port.
950 This option is preferred over the platform specific
951 options; the platform specific options are deprecated
952 and will be soon removed.
954 config DEBUG_LL_UART_EFM32
955 bool "Kernel low-level debugging via efm32 UART"
956 depends on ARCH_EFM32
958 Say Y here if you want the debug print routines to direct
959 their output to an UART or USART port on efm32 based
960 machines. Use the following addresses for DEBUG_UART_PHYS:
968 config DEBUG_LL_UART_PL01X
969 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
971 Say Y here if you wish the debug print routes to direct
972 their output to a PL01x Primecell UART. You can use
973 this option to provide the parameters for the UART
974 rather than selecting one of the platform specific
975 options above if you know the parameters for the port.
977 This option is preferred over the platform specific
978 options; the platform specific options are deprecated
979 and will be soon removed.
983 config DEBUG_EXYNOS_UART
986 config DEBUG_OMAP2PLUS_UART
988 depends on ARCH_OMAP2PLUS
990 config DEBUG_IMX_UART_PORT
991 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
992 DEBUG_IMX25_UART || \
993 DEBUG_IMX21_IMX27_UART || \
994 DEBUG_IMX31_UART || \
995 DEBUG_IMX35_UART || \
996 DEBUG_IMX50_UART || \
997 DEBUG_IMX51_UART || \
998 DEBUG_IMX53_UART || \
999 DEBUG_IMX6Q_UART || \
1004 Choose UART port on which kernel low-level debug messages
1007 config DEBUG_TEGRA_UART
1009 depends on ARCH_TEGRA
1011 config DEBUG_STI_UART
1015 config DEBUG_MSM_UART
1019 config DEBUG_LL_INCLUDE
1021 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
1022 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
1023 default "debug/exynos.S" if DEBUG_EXYNOS_UART
1024 default "debug/efm32.S" if DEBUG_LL_UART_EFM32
1025 default "debug/icedcc.S" if DEBUG_ICEDCC
1026 default "debug/imx.S" if DEBUG_IMX1_UART || \
1027 DEBUG_IMX25_UART || \
1028 DEBUG_IMX21_IMX27_UART || \
1029 DEBUG_IMX31_UART || \
1030 DEBUG_IMX35_UART || \
1031 DEBUG_IMX50_UART || \
1032 DEBUG_IMX51_UART || \
1033 DEBUG_IMX53_UART ||\
1034 DEBUG_IMX6Q_UART || \
1036 default "debug/msm.S" if DEBUG_MSM_UART
1037 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
1038 default "debug/renesas-scif.S" if DEBUG_R7S72100_SCIF2
1039 default "debug/renesas-scif.S" if DEBUG_RCAR_GEN1_SCIF0
1040 default "debug/renesas-scif.S" if DEBUG_RCAR_GEN1_SCIF2
1041 default "debug/renesas-scif.S" if DEBUG_RCAR_GEN2_SCIF0
1042 default "debug/renesas-scif.S" if DEBUG_RCAR_GEN2_SCIF2
1043 default "debug/renesas-scif.S" if DEBUG_RMOBILE_SCIFA0
1044 default "debug/renesas-scif.S" if DEBUG_RMOBILE_SCIFA1
1045 default "debug/renesas-scif.S" if DEBUG_RMOBILE_SCIFA4
1046 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
1047 default "debug/sti.S" if DEBUG_STI_UART
1048 default "debug/tegra.S" if DEBUG_TEGRA_UART
1049 default "debug/ux500.S" if DEBUG_UX500_UART
1050 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
1051 default "debug/vf.S" if DEBUG_VF_UART
1052 default "debug/vt8500.S" if DEBUG_VT8500_UART0
1053 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
1054 default "mach/debug-macro.S"
1056 # Compatibility options for PL01x
1057 config DEBUG_UART_PL01X
1058 def_bool ARCH_EP93XX || \
1059 ARCH_INTEGRATOR || \
1065 # Compatibility options for 8250
1066 config DEBUG_UART_8250
1067 def_bool ARCH_DOVE || ARCH_EBSA110 || \
1068 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
1069 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
1070 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \
1071 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
1073 config DEBUG_UART_PHYS
1074 hex "Physical base address of debug UART"
1075 default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0
1076 default 0x01c28000 if DEBUG_SUNXI_UART0
1077 default 0x01c28400 if DEBUG_SUNXI_UART1
1078 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1
1079 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2
1080 default 0x02530c00 if DEBUG_KEYSTONE_UART0
1081 default 0x02531000 if DEBUG_KEYSTONE_UART1
1082 default 0x03010fe0 if ARCH_RPC
1083 default 0x08108300 if DEBUG_DAVINCI_TNETV107X_UART1
1084 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
1085 DEBUG_VEXPRESS_UART0_CA9
1086 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
1087 default 0x10124000 if DEBUG_RK3X_UART0
1088 default 0x10126000 if DEBUG_RK3X_UART1
1089 default 0x101f1000 if ARCH_VERSATILE
1090 default 0x101fb000 if DEBUG_NOMADIK_UART
1091 default 0x16000000 if ARCH_INTEGRATOR
1092 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
1093 default 0x20060000 if DEBUG_RK29_UART0
1094 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1095 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1096 default 0x20201000 if DEBUG_BCM2835
1097 default 0x3e000000 if DEBUG_BCM_KONA_UART
1098 default 0x4000e400 if DEBUG_LL_UART_EFM32
1099 default 0x40090000 if ARCH_LPC32XX
1100 default 0x40100000 if DEBUG_PXA_UART1
1101 default 0x42000000 if ARCH_GEMINI
1102 default 0x7c0003f8 if FOOTBRIDGE
1103 default 0x80230000 if DEBUG_PICOXCELL_UART
1104 default 0x80070000 if DEBUG_IMX23_UART
1105 default 0x80074000 if DEBUG_IMX28_UART
1106 default 0x808c0000 if ARCH_EP93XX
1107 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1108 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
1109 default 0xc0013000 if DEBUG_U300_UART
1110 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1111 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1112 default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1113 default 0xd0012000 if DEBUG_MVEBU_UART
1114 default 0xd4017000 if DEBUG_MMP_UART2
1115 default 0xd4018000 if DEBUG_MMP_UART3
1116 default 0xe0000000 if ARCH_SPEAR13XX
1117 default 0xe6c40000 if DEBUG_RMOBILE_SCIFA0
1118 default 0xe6c50000 if DEBUG_RMOBILE_SCIFA1
1119 default 0xe6c80000 if DEBUG_RMOBILE_SCIFA4
1120 default 0xe6e58000 if DEBUG_RCAR_GEN2_SCIF2
1121 default 0xe6e60000 if DEBUG_RCAR_GEN2_SCIF0
1122 default 0xe8008000 if DEBUG_R7S72100_SCIF2
1123 default 0xf0000be0 if ARCH_EBSA110
1124 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
1125 default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
1127 default 0xf7fc9000 if DEBUG_BERLIN_UART
1128 default 0xf8b00000 if DEBUG_HI3716_UART
1129 default 0xfcb00000 if DEBUG_HI3620_UART
1130 default 0xfe800000 if ARCH_IOP32X
1131 default 0xffc02000 if DEBUG_SOCFPGA_UART
1132 default 0xffd82340 if ARCH_IOP13XX
1133 default 0xffe40000 if DEBUG_RCAR_GEN1_SCIF0
1134 default 0xffe42000 if DEBUG_RCAR_GEN1_SCIF2
1135 default 0xfff36000 if DEBUG_HIGHBANK_UART
1136 default 0xfffff700 if ARCH_IOP33X
1137 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1138 DEBUG_LL_UART_EFM32 || \
1139 DEBUG_UART_8250 || DEBUG_UART_PL01X || \\
1140 DEBUG_R7S72100_SCIF2 || \
1141 DEBUG_RCAR_GEN1_SCIF0 || DEBUG_RCAR_GEN1_SCIF2 || \
1142 DEBUG_RCAR_GEN2_SCIF0 || DEBUG_RCAR_GEN2_SCIF2 || \
1143 DEBUG_RMOBILE_SCIFA0 || DEBUG_RMOBILE_SCIFA1 || \
1144 DEBUG_RMOBILE_SCIFA4 || DEBUG_S3C24XX_UART || \
1147 config DEBUG_UART_VIRT
1148 hex "Virtual base address of debug UART"
1149 default 0xe0010fe0 if ARCH_RPC
1150 default 0xf0000be0 if ARCH_EBSA110
1151 default 0xf0009000 if DEBUG_CNS3XXX
1152 default 0xf01fb000 if DEBUG_NOMADIK_UART
1153 default 0xf0201000 if DEBUG_BCM2835
1154 default 0xf11f1000 if ARCH_VERSATILE
1155 default 0xf1600000 if ARCH_INTEGRATOR
1156 default 0xf1c28000 if DEBUG_SUNXI_UART0
1157 default 0xf1c28400 if DEBUG_SUNXI_UART1
1158 default 0xf2100000 if DEBUG_PXA_UART1
1159 default 0xf4090000 if ARCH_LPC32XX
1160 default 0xf4200000 if ARCH_GEMINI
1161 default 0xf7fc9000 if DEBUG_BERLIN_UART
1162 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
1163 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
1164 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
1165 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
1166 default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1167 default 0xfd000000 if ARCH_SPEAR13XX
1168 default 0xfd012000 if ARCH_MV78XX0
1169 default 0xfde12000 if ARCH_DOVE
1170 default 0xfe012000 if ARCH_ORION5X
1171 default 0xfe017000 if DEBUG_MMP_UART2
1172 default 0xfe018000 if DEBUG_MMP_UART3
1173 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
1174 default 0xfe230000 if DEBUG_PICOXCELL_UART
1175 default 0xfe300000 if DEBUG_BCM_KONA_UART
1176 default 0xfe800000 if ARCH_IOP32X
1177 default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HI3716_UART
1178 default 0xfeb24000 if DEBUG_RK3X_UART0
1179 default 0xfeb26000 if DEBUG_RK3X_UART1
1180 default 0xfeb30c00 if DEBUG_KEYSTONE_UART0
1181 default 0xfeb31000 if DEBUG_KEYSTONE_UART1
1182 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
1183 default 0xfed60000 if DEBUG_RK29_UART0
1184 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1185 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1186 default 0xfec02000 if DEBUG_SOCFPGA_UART
1187 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0
1188 default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1
1189 default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2
1190 default 0xfed12000 if ARCH_KIRKWOOD
1191 default 0xfedc0000 if ARCH_EP93XX
1192 default 0xfee003f8 if FOOTBRIDGE
1193 default 0xfee08300 if DEBUG_DAVINCI_TNETV107X_UART1
1194 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1195 default 0xfef36000 if DEBUG_HIGHBANK_UART
1196 default 0xfee82340 if ARCH_IOP13XX
1197 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1198 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1199 default 0xfefff700 if ARCH_IOP33X
1200 default 0xff003000 if DEBUG_U300_UART
1201 default DEBUG_UART_PHYS if !MMU
1202 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1203 DEBUG_UART_8250 || DEBUG_UART_PL01X
1205 config DEBUG_UART_8250_SHIFT
1206 int "Register offset shift for the 8250 debug UART"
1207 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1208 default 0 if FOOTBRIDGE || ARCH_IOP32X
1211 config DEBUG_UART_8250_WORD
1212 bool "Use 32-bit accesses for 8250 UART"
1213 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1214 depends on DEBUG_UART_8250_SHIFT >= 2
1215 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
1217 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
1218 DEBUG_DAVINCI_DA8XX_UART2 || DEBUG_DAVINCI_TNETV107X_UART1 || \
1221 config DEBUG_UART_8250_FLOW_CONTROL
1222 bool "Enable flow control for 8250 UART"
1223 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1224 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
1226 config DEBUG_UNCOMPRESS
1228 depends on ARCH_MULTIPLATFORM || ARCH_MSM
1229 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
1230 (!DEBUG_TEGRA_UART || !ZBOOT_ROM)
1232 This option influences the normal decompressor output for
1233 multiplatform kernels. Normally, multiplatform kernels disable
1234 decompressor output because it is not possible to know where to
1235 send the decompressor output.
1237 When this option is set, the selected DEBUG_LL output method
1238 will be re-used for normal decompressor output on multiplatform
1242 config UNCOMPRESS_INCLUDE
1244 default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM
1245 default "mach/uncompress.h"
1251 Say Y here if you want to have an early console using the
1252 kernel low-level debugging functions. Add earlyprintk to your
1253 kernel parameters to enable this console.
1256 bool "On-chip ETM and ETB"
1259 Enables the on-chip embedded trace macrocell and embedded trace
1260 buffer driver that will allow you to collect traces of the
1263 config ARM_KPROBES_TEST
1264 tristate "Kprobes test module"
1265 depends on KPROBES && MODULES
1267 Perform tests of kprobes API and instruction set simulation.
1269 config PID_IN_CONTEXTIDR
1270 bool "Write the current PID to the CONTEXTIDR register"
1271 depends on CPU_COPY_V6
1273 Enabling this option causes the kernel to write the current PID to
1274 the PROCID field of the CONTEXTIDR register, at the expense of some
1275 additional instructions during context switch. Say Y here only if you
1276 are planning to use hardware trace tools with this kernel.
1278 config DEBUG_SET_MODULE_RONX
1279 bool "Set loadable kernel module data as NX and text as RO"
1282 This option helps catch unintended modifications to loadable
1283 kernel module's text and read-only data. It also prevents execution
1284 of module data. Such protection may interfere with run-time code
1285 patching and dynamic kernel tracing - and they might also protect
1286 against certain classes of kernel exploits.
1287 If in doubt, say "N".