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_5301X
110 bool "Kernel low-level debugging on BCM5301X UART1"
111 depends on ARCH_BCM_5301X
112 select DEBUG_UART_PL01X
114 config DEBUG_BCM_KONA_UART
115 bool "Kernel low-level debugging messages via BCM KONA UART"
116 depends on ARCH_BCM_MOBILE
117 select DEBUG_UART_8250
119 Say Y here if you want kernel low-level debugging support
120 on Broadcom SoC platforms.
121 This low level debug works for Broadcom
122 mobile SoCs in the Kona family of chips (e.g. bcm28155,
125 config DEBUG_BERLIN_UART
126 bool "Marvell Berlin SoC Debug UART"
127 depends on ARCH_BERLIN
128 select DEBUG_UART_8250
130 Say Y here if you want kernel low-level debugging support
131 on Marvell Berlin SoC based platforms.
133 config DEBUG_CLPS711X_UART1
134 bool "Kernel low-level debugging messages via UART1"
135 depends on ARCH_CLPS711X
137 Say Y here if you want the debug print routines to direct
138 their output to the first serial port on these devices.
140 config DEBUG_CLPS711X_UART2
141 bool "Kernel low-level debugging messages via UART2"
142 depends on ARCH_CLPS711X
144 Say Y here if you want the debug print routines to direct
145 their output to the second serial port on these devices.
148 bool "Kernel Kernel low-level debugging on Cavium Networks CNS3xxx"
149 depends on ARCH_CNS3XXX
150 select DEBUG_UART_PL01X
152 Say Y here if you want the debug print routines to direct
153 their output to the CNS3xxx UART0.
155 config DEBUG_DAVINCI_DA8XX_UART1
156 bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
157 depends on ARCH_DAVINCI_DA8XX
158 select DEBUG_UART_8250
160 Say Y here if you want the debug print routines to direct
161 their output to UART1 serial port on DaVinci DA8XX devices.
163 config DEBUG_DAVINCI_DA8XX_UART2
164 bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
165 depends on ARCH_DAVINCI_DA8XX
166 select DEBUG_UART_8250
168 Say Y here if you want the debug print routines to direct
169 their output to UART2 serial port on DaVinci DA8XX devices.
171 config DEBUG_DAVINCI_DMx_UART0
172 bool "Kernel low-level debugging on DaVinci DMx using UART0"
173 depends on ARCH_DAVINCI_DMx
174 select DEBUG_UART_8250
176 Say Y here if you want the debug print routines to direct
177 their output to UART0 serial port on DaVinci DMx devices.
179 config DEBUG_ZYNQ_UART0
180 bool "Kernel low-level debugging on Xilinx Zynq using UART0"
183 Say Y here if you want the debug print routines to direct
184 their output to UART0 on the Zynq platform.
186 config DEBUG_ZYNQ_UART1
187 bool "Kernel low-level debugging on Xilinx Zynq using UART1"
190 Say Y here if you want the debug print routines to direct
191 their output to UART1 on the Zynq platform.
193 If you have a ZC702 board and want early boot messages to
194 appear on the USB serial adaptor, select this option.
196 config DEBUG_DC21285_PORT
197 bool "Kernel low-level debugging messages via footbridge serial port"
198 depends on FOOTBRIDGE
200 Say Y here if you want the debug print routines to direct
201 their output to the serial port in the DC21285 (Footbridge).
203 config DEBUG_FOOTBRIDGE_COM1
204 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
205 depends on FOOTBRIDGE
207 Say Y here if you want the debug print routines to direct
208 their output to the 8250 at PCI COM1.
210 config DEBUG_HI3620_UART
211 bool "Hisilicon HI3620 Debug UART"
212 depends on ARCH_HI3xxx
213 select DEBUG_UART_PL01X
215 Say Y here if you want kernel low-level debugging support
218 config DEBUG_HI3716_UART
219 bool "Hisilicon Hi3716 Debug UART"
220 depends on ARCH_HI3xxx
221 select DEBUG_UART_PL01X
223 Say Y here if you want kernel low-level debugging support
226 config DEBUG_HIGHBANK_UART
227 bool "Kernel low-level debugging messages via Highbank UART"
228 depends on ARCH_HIGHBANK
229 select DEBUG_UART_PL01X
231 Say Y here if you want the debug print routines to direct
232 their output to the UART on Highbank based devices.
234 config DEBUG_HIP04_UART
235 bool "Hisilicon HiP04 Debug UART"
236 depends on ARCH_HIP04
237 select DEBUG_UART_8250
239 Say Y here if you want kernel low-level debugging support
242 config DEBUG_HIX5HD2_UART
243 bool "Hisilicon Hix5hd2 Debug UART"
244 depends on ARCH_HIX5HD2
245 select DEBUG_UART_PL01X
247 Say Y here if you want kernel low-level debugging support
250 config DEBUG_IMX1_UART
251 bool "i.MX1 Debug UART"
254 Say Y here if you want kernel low-level debugging support
257 config DEBUG_IMX23_UART
258 bool "i.MX23 Debug UART"
260 select DEBUG_UART_PL01X
262 Say Y here if you want kernel low-level debugging support
265 config DEBUG_IMX25_UART
266 bool "i.MX25 Debug UART"
269 Say Y here if you want kernel low-level debugging support
272 config DEBUG_IMX21_IMX27_UART
273 bool "i.MX21 and i.MX27 Debug UART"
274 depends on SOC_IMX21 || SOC_IMX27
276 Say Y here if you want kernel low-level debugging support
279 config DEBUG_IMX28_UART
280 bool "i.MX28 Debug UART"
282 select DEBUG_UART_PL01X
284 Say Y here if you want kernel low-level debugging support
287 config DEBUG_IMX31_UART
288 bool "i.MX31 Debug UART"
291 Say Y here if you want kernel low-level debugging support
294 config DEBUG_IMX35_UART
295 bool "i.MX35 Debug UART"
298 Say Y here if you want kernel low-level debugging support
301 config DEBUG_IMX50_UART
302 bool "i.MX50 Debug UART"
305 Say Y here if you want kernel low-level debugging support
308 config DEBUG_IMX51_UART
309 bool "i.MX51 Debug UART"
312 Say Y here if you want kernel low-level debugging support
315 config DEBUG_IMX53_UART
316 bool "i.MX53 Debug UART"
319 Say Y here if you want kernel low-level debugging support
322 config DEBUG_IMX6Q_UART
323 bool "i.MX6Q/DL Debug UART"
326 Say Y here if you want kernel low-level debugging support
329 config DEBUG_IMX6SL_UART
330 bool "i.MX6SL Debug UART"
331 depends on SOC_IMX6SL
333 Say Y here if you want kernel low-level debugging support
336 config DEBUG_IMX6SX_UART
337 bool "i.MX6SX Debug UART"
338 depends on SOC_IMX6SX
340 Say Y here if you want kernel low-level debugging support
343 config DEBUG_KEYSTONE_UART0
344 bool "Kernel low-level debugging on KEYSTONE2 using UART0"
345 depends on ARCH_KEYSTONE
346 select DEBUG_UART_8250
348 Say Y here if you want the debug print routines to direct
349 their output to UART0 serial port on KEYSTONE2 devices.
351 config DEBUG_KEYSTONE_UART1
352 bool "Kernel low-level debugging on KEYSTONE2 using UART1"
353 depends on ARCH_KEYSTONE
354 select DEBUG_UART_8250
356 Say Y here if you want the debug print routines to direct
357 their output to UART1 serial port on KEYSTONE2 devices.
359 config DEBUG_MESON_UARTAO
360 bool "Kernel low-level debugging via Meson6 UARTAO"
361 depends on ARCH_MESON
363 Say Y here if you want kernel low-lever debugging support
364 on Amlogic Meson6 based platforms on the UARTAO.
366 config DEBUG_MMP_UART2
367 bool "Kernel low-level debugging message via MMP UART2"
369 select DEBUG_UART_8250
371 Say Y here if you want kernel low-level debugging support
374 config DEBUG_MMP_UART3
375 bool "Kernel low-level debugging message via MMP UART3"
377 select DEBUG_UART_8250
379 Say Y here if you want kernel low-level debugging support
382 config DEBUG_MSM_UART
383 bool "Kernel low-level debugging messages via MSM UART"
386 Say Y here if you want the debug print routines to direct
387 their output to the serial port on MSM devices.
389 ARCH DEBUG_UART_PHYS DEBUG_UART_BASE #
390 MSM7X00A, QSD8X50 0xa9a00000 0xe1000000 UART1
391 MSM7X00A, QSD8X50 0xa9b00000 0xe1000000 UART2
392 MSM7X00A, QSD8X50 0xa9c00000 0xe1000000 UART3
394 MSM7X30 0xaca00000 0xe1000000 UART1
395 MSM7X30 0xacb00000 0xe1000000 UART2
396 MSM7X30 0xacc00000 0xe1000000 UART3
398 Please adjust DEBUG_UART_PHYS and DEBUG_UART_BASE configuration
399 options based on your needs.
401 config DEBUG_QCOM_UARTDM
402 bool "Kernel low-level debugging messages via QCOM UARTDM"
405 Say Y here if you want the debug print routines to direct
406 their output to the serial port on Qualcomm devices.
408 ARCH DEBUG_UART_PHYS DEBUG_UART_BASE
409 APQ8084 0xf995e000 0xfa75e000
410 MSM8X60 0x19c40000 0xf0040000
411 MSM8960 0x16440000 0xf0040000
412 MSM8974 0xf991e000 0xfa71e000
414 Please adjust DEBUG_UART_PHYS and DEBUG_UART_BASE configuration
415 options based on your needs.
417 config DEBUG_MVEBU_UART
418 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
419 depends on ARCH_MVEBU
420 select DEBUG_UART_8250
422 Say Y here if you want kernel low-level debugging support
423 on MVEBU based platforms.
425 This option should be used with the old bootloaders
426 that left the internal registers mapped at
427 0xd0000000. As of today, this is the case on
428 platforms such as the Globalscale Mirabox or the
429 Plathome OpenBlocks AX3, when using the original
432 If the wrong DEBUG_MVEBU_UART* option is selected,
433 when u-boot hands over to the kernel, the system
434 silently crashes, with no serial output at all.
436 config DEBUG_MVEBU_UART_ALTERNATE
437 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
438 depends on ARCH_MVEBU
439 select DEBUG_UART_8250
441 Say Y here if you want kernel low-level debugging support
442 on MVEBU based platforms.
444 This option should be used with the new bootloaders
445 that remap the internal registers at 0xf1000000.
447 If the wrong DEBUG_MVEBU_UART* option is selected,
448 when u-boot hands over to the kernel, the system
449 silently crashes, with no serial output at all.
455 Say Y here if you want kernel low-level debugging support
456 on Vybrid based platforms.
458 config DEBUG_NOMADIK_UART
459 bool "Kernel low-level debugging messages via NOMADIK UART"
460 depends on ARCH_NOMADIK
461 select DEBUG_UART_PL01X
463 Say Y here if you want kernel low-level debugging support
464 on NOMADIK based platforms.
466 config DEBUG_NSPIRE_CLASSIC_UART
467 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
468 depends on ARCH_NSPIRE
469 select DEBUG_UART_8250
471 Say Y here if you want kernel low-level debugging support
472 on TI-NSPIRE classic models.
474 config DEBUG_NSPIRE_CX_UART
475 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
476 depends on ARCH_NSPIRE
477 select DEBUG_UART_PL01X
479 Say Y here if you want kernel low-level debugging support
480 on TI-NSPIRE CX models.
482 config DEBUG_OMAP2UART1
483 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
484 depends on ARCH_OMAP2PLUS
485 select DEBUG_OMAP2PLUS_UART
487 This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
488 omap3 torpedo and 3530 lv som.
490 config DEBUG_OMAP2UART2
491 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
492 depends on ARCH_OMAP2PLUS
493 select DEBUG_OMAP2PLUS_UART
495 config DEBUG_OMAP2UART3
496 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
497 depends on ARCH_OMAP2PLUS
498 select DEBUG_OMAP2PLUS_UART
500 config DEBUG_OMAP3UART3
501 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
502 depends on ARCH_OMAP2PLUS
503 select DEBUG_OMAP2PLUS_UART
505 This covers at least cm_t3x, beagle, crane, devkit8000,
506 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
509 config DEBUG_OMAP4UART3
510 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
511 depends on ARCH_OMAP2PLUS
512 select DEBUG_OMAP2PLUS_UART
514 config DEBUG_OMAP3UART4
515 bool "Kernel low-level debugging messages via OMAP36XX UART4"
516 depends on ARCH_OMAP2PLUS
517 select DEBUG_OMAP2PLUS_UART
519 config DEBUG_OMAP4UART4
520 bool "Kernel low-level debugging messages via OMAP4/5 UART4"
521 depends on ARCH_OMAP2PLUS
522 select DEBUG_OMAP2PLUS_UART
524 config DEBUG_TI81XXUART1
525 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
526 depends on ARCH_OMAP2PLUS
527 select DEBUG_OMAP2PLUS_UART
529 config DEBUG_TI81XXUART2
530 bool "Kernel low-level debugging messages via TI81XX UART2"
531 depends on ARCH_OMAP2PLUS
532 select DEBUG_OMAP2PLUS_UART
534 config DEBUG_TI81XXUART3
535 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
536 depends on ARCH_OMAP2PLUS
537 select DEBUG_OMAP2PLUS_UART
539 config DEBUG_AM33XXUART1
540 bool "Kernel low-level debugging messages via AM33XX UART1"
541 depends on ARCH_OMAP2PLUS
542 select DEBUG_OMAP2PLUS_UART
544 config DEBUG_ZOOM_UART
545 bool "Kernel low-level debugging messages via Zoom2/3 UART"
546 depends on ARCH_OMAP2PLUS
547 select DEBUG_OMAP2PLUS_UART
549 config DEBUG_PICOXCELL_UART
550 depends on ARCH_PICOXCELL
551 bool "Use PicoXcell UART for low-level debug"
552 select DEBUG_UART_8250
554 Say Y here if you want kernel low-level debugging support
555 on PicoXcell based platforms.
557 config DEBUG_PXA_UART1
559 bool "Use PXA UART1 for low-level debug"
560 select DEBUG_UART_8250
562 Say Y here if you want kernel low-level debugging support
565 config DEBUG_REALVIEW_STD_PORT
566 bool "RealView Default UART"
567 depends on ARCH_REALVIEW
568 select DEBUG_UART_PL01X
570 Say Y here if you want the debug print routines to direct
571 their output to the serial port on RealView EB, PB11MP, PBA8
574 config DEBUG_REALVIEW_PB1176_PORT
575 bool "RealView PB1176 UART"
576 depends on MACH_REALVIEW_PB1176
577 select DEBUG_UART_PL01X
579 Say Y here if you want the debug print routines to direct
580 their output to the standard serial port on the RealView
583 config DEBUG_RK29_UART0
584 bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
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_RK29_UART1
592 bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
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_RK29_UART2
600 bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
601 depends on ARCH_ROCKCHIP
602 select DEBUG_UART_8250
604 Say Y here if you want kernel low-level debugging support
605 on Rockchip based platforms.
607 config DEBUG_RK3X_UART0
608 bool "Kernel low-level debugging messages via Rockchip RK30/RK31 UART0"
609 depends on ARCH_ROCKCHIP
610 select DEBUG_UART_8250
612 Say Y here if you want kernel low-level debugging support
613 on Rockchip based platforms.
615 config DEBUG_RK3X_UART1
616 bool "Kernel low-level debugging messages via Rockchip RK30/RK31 UART1"
617 depends on ARCH_ROCKCHIP
618 select DEBUG_UART_8250
620 Say Y here if you want kernel low-level debugging support
621 on Rockchip based platforms.
623 config DEBUG_RK3X_UART2
624 bool "Kernel low-level debugging messages via Rockchip RK30/RK31 UART2"
625 depends on ARCH_ROCKCHIP
626 select DEBUG_UART_8250
628 Say Y here if you want kernel low-level debugging support
629 on Rockchip based platforms.
631 config DEBUG_RK3X_UART3
632 bool "Kernel low-level debugging messages via Rockchip RK30/RK31 UART3"
633 depends on ARCH_ROCKCHIP
634 select DEBUG_UART_8250
636 Say Y here if you want kernel low-level debugging support
637 on Rockchip based platforms.
639 config DEBUG_RK32_UART2
640 bool "Kernel low-level debugging messages via Rockchip RK32 UART2"
641 depends on ARCH_ROCKCHIP
642 select DEBUG_UART_8250
644 Say Y here if you want kernel low-level debugging support
645 on Rockchip RK32xx based platforms.
647 config DEBUG_S3C_UART0
648 depends on PLAT_SAMSUNG
649 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
650 select DEBUG_S3C24XX_UART if ARCH_S3C24XX
651 select DEBUG_S5PV210_UART if ARCH_S5PV210
652 bool "Use Samsung S3C UART 0 for low-level debug"
654 Say Y here if you want the debug print routines to direct
655 their output to UART 0. The port must have been initialised
656 by the boot-loader before use.
658 config DEBUG_S3C_UART1
659 depends on PLAT_SAMSUNG
660 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
661 select DEBUG_S3C24XX_UART if ARCH_S3C24XX
662 select DEBUG_S5PV210_UART if ARCH_S5PV210
663 bool "Use Samsung S3C UART 1 for low-level debug"
665 Say Y here if you want the debug print routines to direct
666 their output to UART 1. The port must have been initialised
667 by the boot-loader before use.
669 config DEBUG_S3C_UART2
670 depends on PLAT_SAMSUNG
671 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
672 select DEBUG_S3C24XX_UART if ARCH_S3C24XX
673 select DEBUG_S5PV210_UART if ARCH_S5PV210
674 bool "Use Samsung S3C UART 2 for low-level debug"
676 Say Y here if you want the debug print routines to direct
677 their output to UART 2. The port must have been initialised
678 by the boot-loader before use.
680 config DEBUG_S3C_UART3
681 depends on PLAT_SAMSUNG && (ARCH_EXYNOS || ARCH_S5PV210)
682 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
683 select DEBUG_S5PV210_UART if ARCH_S5PV210
684 bool "Use Samsung S3C UART 3 for low-level debug"
686 Say Y here if you want the debug print routines to direct
687 their output to UART 3. The port must have been initialised
688 by the boot-loader before use.
690 config DEBUG_S3C2410_UART0
691 depends on ARCH_S3C24XX
692 select DEBUG_S3C2410_UART
693 bool "Use S3C2410/S3C2412 UART 0 for low-level debug"
695 Say Y here if you want the debug print routines to direct
696 their output to UART 0. The port must have been initialised
697 by the boot-loader before use.
699 config DEBUG_S3C2410_UART1
700 depends on ARCH_S3C24XX
701 select DEBUG_S3C2410_UART
702 bool "Use S3C2410/S3C2412 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 config DEBUG_S3C2410_UART2
709 depends on ARCH_S3C24XX
710 select DEBUG_S3C2410_UART
711 bool "Use S3C2410/S3C2412 UART 2 for low-level debug"
713 Say Y here if you want the debug print routines to direct
714 their output to UART 2. The port must have been initialised
715 by the boot-loader before use.
717 config DEBUG_SOCFPGA_UART
718 depends on ARCH_SOCFPGA
719 bool "Use SOCFPGA UART for low-level debug"
720 select DEBUG_UART_8250
722 Say Y here if you want kernel low-level debugging support
723 on SOCFPGA based platforms.
725 config DEBUG_SUNXI_UART0
726 bool "Kernel low-level debugging messages via sunXi UART0"
727 depends on ARCH_SUNXI
728 select DEBUG_UART_8250
730 Say Y here if you want kernel low-level debugging support
731 on Allwinner A1X based platforms on the UART0.
733 config DEBUG_SUNXI_UART1
734 bool "Kernel low-level debugging messages via sunXi UART1"
735 depends on ARCH_SUNXI
736 select DEBUG_UART_8250
738 Say Y here if you want kernel low-level debugging support
739 on Allwinner A1X based platforms on the UART1.
741 config DEBUG_SUNXI_R_UART
742 bool "Kernel low-level debugging messages via sunXi R_UART"
743 depends on MACH_SUN6I || MACH_SUN8I
744 select DEBUG_UART_8250
746 Say Y here if you want kernel low-level debugging support
747 on Allwinner A31/A23 based platforms on the R_UART.
749 config TEGRA_DEBUG_UART_AUTO_ODMDATA
750 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
751 depends on ARCH_TEGRA
752 select DEBUG_TEGRA_UART
754 Automatically determines which UART to use for low-level
755 debug based on the ODMDATA value. This value is part of
756 the BCT, and is written to the boot memory device using
757 nvflash, or other flashing tool. When bits 19:18 are 3,
758 then bits 17:15 indicate which UART to use; 0/1/2/3/4
761 config TEGRA_DEBUG_UARTA
762 bool "Kernel low-level debugging messages via Tegra UART A"
763 depends on ARCH_TEGRA
764 select DEBUG_TEGRA_UART
766 Say Y here if you want kernel low-level debugging support
767 on Tegra based platforms.
769 config TEGRA_DEBUG_UARTB
770 bool "Kernel low-level debugging messages via Tegra UART B"
771 depends on ARCH_TEGRA
772 select DEBUG_TEGRA_UART
774 Say Y here if you want kernel low-level debugging support
775 on Tegra based platforms.
777 config TEGRA_DEBUG_UARTC
778 bool "Kernel low-level debugging messages via Tegra UART C"
779 depends on ARCH_TEGRA
780 select DEBUG_TEGRA_UART
782 Say Y here if you want kernel low-level debugging support
783 on Tegra based platforms.
785 config TEGRA_DEBUG_UARTD
786 bool "Kernel low-level debugging messages via Tegra UART D"
787 depends on ARCH_TEGRA
788 select DEBUG_TEGRA_UART
790 Say Y here if you want kernel low-level debugging support
791 on Tegra based platforms.
793 config TEGRA_DEBUG_UARTE
794 bool "Kernel low-level debugging messages via Tegra UART E"
795 depends on ARCH_TEGRA
796 select DEBUG_TEGRA_UART
798 Say Y here if you want kernel low-level debugging support
799 on Tegra based platforms.
801 config DEBUG_SIRFPRIMA2_UART1
802 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
803 depends on ARCH_PRIMA2
805 Say Y here if you want the debug print routines to direct
806 their output to the uart1 port on SiRFprimaII devices.
808 config DEBUG_SIRFMARCO_UART1
809 bool "Kernel low-level debugging messages via SiRFmarco UART1"
810 depends on ARCH_MARCO
812 Say Y here if you want the debug print routines to direct
813 their output to the uart1 port on SiRFmarco devices.
815 config STIH41X_DEBUG_ASC2
816 bool "Use StiH415/416 ASC2 UART for low-level debug"
818 select DEBUG_STI_UART
820 Say Y here if you want kernel low-level debugging support
821 on STiH415/416 based platforms like b2000, which has
822 default UART wired up to ASC2.
826 config STIH41X_DEBUG_SBC_ASC1
827 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
829 select DEBUG_STI_UART
831 Say Y here if you want kernel low-level debugging support
832 on STiH415/416 based platforms like b2020. which has
833 default UART wired up to SBC ASC1.
837 config DEBUG_U300_UART
838 bool "Kernel low-level debugging messages via U300 UART0"
840 select DEBUG_UART_PL01X
842 Say Y here if you want the debug print routines to direct
843 their output to the uart port on U300 devices.
845 config DEBUG_UX500_UART
846 depends on ARCH_U8500
847 bool "Use Ux500 UART for low-level debug"
849 Say Y here if you want kernel low-level debugging support
850 on Ux500 based platforms.
852 config DEBUG_MT6589_UART0
853 bool "Mediatek mt6589 UART0"
854 depends on ARCH_MEDIATEK
855 select DEBUG_UART_8250
857 Say Y here if you want kernel low-level debugging support
858 for Mediatek mt6589 based platforms on UART0.
860 config DEBUG_VEXPRESS_UART0_DETECT
861 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
862 depends on ARCH_VEXPRESS && CPU_CP15_MMU
864 This option enables a simple heuristic which tries to determine
865 the motherboard's memory map variant (original or RS1) and then
866 choose the relevant UART0 base address.
868 Note that this will only work with standard A-class core tiles,
869 and may fail with non-standard SMM or custom software models.
871 config DEBUG_VEXPRESS_UART0_CA9
872 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
873 depends on ARCH_VEXPRESS
874 select DEBUG_UART_PL01X
876 This option selects UART0 at 0x10009000. Except for custom models,
877 this applies only to the V2P-CA9 tile.
879 config DEBUG_VEXPRESS_UART0_RS1
880 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
881 depends on ARCH_VEXPRESS
882 select DEBUG_UART_PL01X
884 This option selects UART0 at 0x1c090000. This applies to most
885 of the tiles using the RS1 memory map, including all new A-class
886 core tiles, FPGA-based SMMs and software models.
888 config DEBUG_VEXPRESS_UART0_CRX
889 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
890 depends on ARCH_VEXPRESS && !MMU
891 select DEBUG_UART_PL01X
893 This option selects UART0 at 0xb0090000. This is appropriate for
894 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
896 config DEBUG_VT8500_UART0
897 bool "Use UART0 on VIA/Wondermedia SoCs"
898 depends on ARCH_VT8500
900 This option selects UART0 on VIA/Wondermedia System-on-a-chip
901 devices, including VT8500, WM8505, WM8650 and WM8850.
903 config DEBUG_LL_UART_NONE
904 bool "No low-level debugging UART"
905 depends on !ARCH_MULTIPLATFORM
907 Say Y here if your platform doesn't provide a UART option
908 above. This relies on your platform choosing the right UART
909 definition internally in order for low-level debugging to
913 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
915 Say Y here if you want the debug print routines to direct
916 their output to the EmbeddedICE macrocell's DCC channel using
917 co-processor 14. This is known to work on the ARM9 style ICE
918 channel and on the XScale with the PEEDI.
920 Note that the system will appear to hang during boot if there
921 is nothing connected to read from the DCC.
923 config DEBUG_SEMIHOSTING
924 bool "Kernel low-level debug output via semihosting I/O"
926 Semihosting enables code running on an ARM target to use
927 the I/O facilities on a host debugger/emulator through a
928 simple SVC call. The host debugger or emulator must have
929 semihosting enabled for the special svc call to be trapped
930 otherwise the kernel will crash.
932 This is known to work with OpenOCD, as well as
933 ARM's Fast Models, or any other controlling environment
934 that implements semihosting.
936 For more details about semihosting, please see
937 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
939 config DEBUG_LL_UART_8250
940 bool "Kernel low-level debugging via 8250 UART"
942 Say Y here if you wish the debug print routes to direct
943 their output to an 8250 UART. You can use this option
944 to provide the parameters for the 8250 UART rather than
945 selecting one of the platform specific options above if
946 you know the parameters for the port.
948 This option is preferred over the platform specific
949 options; the platform specific options are deprecated
950 and will be soon removed.
952 config DEBUG_LL_UART_EFM32
953 bool "Kernel low-level debugging via efm32 UART"
954 depends on ARCH_EFM32
956 Say Y here if you want the debug print routines to direct
957 their output to an UART or USART port on efm32 based
958 machines. Use the following addresses for DEBUG_UART_PHYS:
966 config DEBUG_LL_UART_PL01X
967 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
969 Say Y here if you wish the debug print routes to direct
970 their output to a PL01x Primecell UART. You can use
971 this option to provide the parameters for the UART
972 rather than selecting one of the platform specific
973 options above if you know the parameters for the port.
975 This option is preferred over the platform specific
976 options; the platform specific options are deprecated
977 and will be soon removed.
981 config DEBUG_EXYNOS_UART
984 config DEBUG_S3C2410_UART
986 select DEBUG_S3C24XX_UART
988 config DEBUG_S3C24XX_UART
991 config DEBUG_S5PV210_UART
994 config DEBUG_OMAP2PLUS_UART
996 depends on ARCH_OMAP2PLUS
998 config DEBUG_IMX_UART_PORT
999 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
1000 DEBUG_IMX25_UART || \
1001 DEBUG_IMX21_IMX27_UART || \
1002 DEBUG_IMX31_UART || \
1003 DEBUG_IMX35_UART || \
1004 DEBUG_IMX50_UART || \
1005 DEBUG_IMX51_UART || \
1006 DEBUG_IMX53_UART || \
1007 DEBUG_IMX6Q_UART || \
1008 DEBUG_IMX6SL_UART || \
1013 Choose UART port on which kernel low-level debug messages
1016 config DEBUG_VF_UART_PORT
1017 int "Vybrid Debug UART Port Selection" if DEBUG_VF_UART
1020 depends on SOC_VF610
1022 Choose UART port on which kernel low-level debug messages
1025 config DEBUG_TEGRA_UART
1027 depends on ARCH_TEGRA
1029 config DEBUG_STI_UART
1033 config DEBUG_LL_INCLUDE
1035 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
1036 default "debug/clps711x.S" if DEBUG_CLPS711X_UART1 || DEBUG_CLPS711X_UART2
1037 default "debug/meson.S" if DEBUG_MESON_UARTAO
1038 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
1039 default "debug/exynos.S" if DEBUG_EXYNOS_UART
1040 default "debug/efm32.S" if DEBUG_LL_UART_EFM32
1041 default "debug/icedcc.S" if DEBUG_ICEDCC
1042 default "debug/imx.S" if DEBUG_IMX1_UART || \
1043 DEBUG_IMX25_UART || \
1044 DEBUG_IMX21_IMX27_UART || \
1045 DEBUG_IMX31_UART || \
1046 DEBUG_IMX35_UART || \
1047 DEBUG_IMX50_UART || \
1048 DEBUG_IMX51_UART || \
1049 DEBUG_IMX53_UART ||\
1050 DEBUG_IMX6Q_UART || \
1051 DEBUG_IMX6SL_UART || \
1053 default "debug/msm.S" if DEBUG_MSM_UART || DEBUG_QCOM_UARTDM
1054 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
1055 default "debug/s3c24xx.S" if DEBUG_S3C24XX_UART
1056 default "debug/s5pv210.S" if DEBUG_S5PV210_UART
1057 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
1058 default "debug/sti.S" if DEBUG_STI_UART
1059 default "debug/tegra.S" if DEBUG_TEGRA_UART
1060 default "debug/ux500.S" if DEBUG_UX500_UART
1061 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
1062 default "debug/vf.S" if DEBUG_VF_UART
1063 default "debug/vt8500.S" if DEBUG_VT8500_UART0
1064 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
1065 default "mach/debug-macro.S"
1067 # Compatibility options for PL01x
1068 config DEBUG_UART_PL01X
1069 def_bool ARCH_EP93XX || \
1070 ARCH_INTEGRATOR || \
1076 # Compatibility options for 8250
1077 config DEBUG_UART_8250
1078 def_bool ARCH_DOVE || ARCH_EBSA110 || \
1079 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
1080 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
1081 ARCH_IOP33X || ARCH_IXP4XX || \
1082 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
1084 config DEBUG_UART_PHYS
1085 hex "Physical base address of debug UART"
1086 default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0
1087 default 0x01c28000 if DEBUG_SUNXI_UART0
1088 default 0x01c28400 if DEBUG_SUNXI_UART1
1089 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1
1090 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2
1091 default 0x01f02800 if DEBUG_SUNXI_R_UART
1092 default 0x02530c00 if DEBUG_KEYSTONE_UART0
1093 default 0x02531000 if DEBUG_KEYSTONE_UART1
1094 default 0x03010fe0 if ARCH_RPC
1095 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
1096 DEBUG_VEXPRESS_UART0_CA9
1097 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
1098 default 0x10124000 if DEBUG_RK3X_UART0
1099 default 0x10126000 if DEBUG_RK3X_UART1
1100 default 0x101f1000 if ARCH_VERSATILE
1101 default 0x101fb000 if DEBUG_NOMADIK_UART
1102 default 0x11006000 if DEBUG_MT6589_UART0
1103 default 0x16000000 if ARCH_INTEGRATOR
1104 default 0x18000300 if DEBUG_BCM_5301X
1105 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
1106 default 0x20060000 if DEBUG_RK29_UART0
1107 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1108 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1109 default 0x20201000 if DEBUG_BCM2835
1110 default 0x3e000000 if DEBUG_BCM_KONA_UART
1111 default 0x4000e400 if DEBUG_LL_UART_EFM32
1112 default 0x40090000 if ARCH_LPC32XX
1113 default 0x40100000 if DEBUG_PXA_UART1
1114 default 0x42000000 if ARCH_GEMINI
1115 default 0x50000000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART0 || \
1116 DEBUG_S3C2410_UART0)
1117 default 0x50004000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART1 || \
1118 DEBUG_S3C2410_UART1)
1119 default 0x50008000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART2 || \
1120 DEBUG_S3C2410_UART2)
1121 default 0x7c0003f8 if FOOTBRIDGE
1122 default 0x80070000 if DEBUG_IMX23_UART
1123 default 0x80074000 if DEBUG_IMX28_UART
1124 default 0x80230000 if DEBUG_PICOXCELL_UART
1125 default 0x808c0000 if ARCH_EP93XX
1126 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1127 default 0xa9a00000 if DEBUG_MSM_UART
1128 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
1129 default 0xc0013000 if DEBUG_U300_UART
1130 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1131 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1132 default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1133 default 0xd0012000 if DEBUG_MVEBU_UART
1134 default 0xc81004c0 if DEBUG_MESON_UARTAO
1135 default 0xd4017000 if DEBUG_MMP_UART2
1136 default 0xd4018000 if DEBUG_MMP_UART3
1137 default 0xe0000000 if ARCH_SPEAR13XX
1138 default 0xe4007000 if DEBUG_HIP04_UART
1139 default 0xf0000be0 if ARCH_EBSA110
1140 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
1141 default 0xf1012000 if ARCH_DOVE || ARCH_MV78XX0 || \
1143 default 0xf7fc9000 if DEBUG_BERLIN_UART
1144 default 0xf8b00000 if DEBUG_HIX5HD2_UART
1145 default 0xf991e000 if DEBUG_QCOM_UARTDM
1146 default 0xfcb00000 if DEBUG_HI3620_UART
1147 default 0xfe800000 if ARCH_IOP32X
1148 default 0xff690000 if DEBUG_RK32_UART2
1149 default 0xffc02000 if DEBUG_SOCFPGA_UART
1150 default 0xffd82340 if ARCH_IOP13XX
1151 default 0xfff36000 if DEBUG_HIGHBANK_UART
1152 default 0xfffff700 if ARCH_IOP33X
1153 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1154 DEBUG_LL_UART_EFM32 || \
1155 DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_MESON_UARTAO || \
1156 DEBUG_MSM_UART || DEBUG_QCOM_UARTDM || DEBUG_S3C24XX_UART
1158 config DEBUG_UART_VIRT
1159 hex "Virtual base address of debug UART"
1160 default 0xe0010fe0 if ARCH_RPC
1161 default 0xe1000000 if DEBUG_MSM_UART
1162 default 0xf0000be0 if ARCH_EBSA110
1163 default 0xf0009000 if DEBUG_CNS3XXX
1164 default 0xf01fb000 if DEBUG_NOMADIK_UART
1165 default 0xf0201000 if DEBUG_BCM2835
1166 default 0xf1000300 if DEBUG_BCM_5301X
1167 default 0xf1006000 if DEBUG_MT6589_UART0
1168 default 0xf11f1000 if ARCH_VERSATILE
1169 default 0xf1600000 if ARCH_INTEGRATOR
1170 default 0xf1c28000 if DEBUG_SUNXI_UART0
1171 default 0xf1c28400 if DEBUG_SUNXI_UART1
1172 default 0xf1f02800 if DEBUG_SUNXI_R_UART
1173 default 0xf2100000 if DEBUG_PXA_UART1
1174 default 0xf4090000 if ARCH_LPC32XX
1175 default 0xf4200000 if ARCH_GEMINI
1176 default 0xf7000000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART0 || \
1177 DEBUG_S3C2410_UART0)
1178 default 0xf7004000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART1 || \
1179 DEBUG_S3C2410_UART1)
1180 default 0xf7008000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART2 || \
1181 DEBUG_S3C2410_UART2)
1182 default 0xf7fc9000 if DEBUG_BERLIN_UART
1183 default 0xf8007000 if DEBUG_HIP04_UART
1184 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
1185 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
1186 default 0xfa71e000 if DEBUG_QCOM_UARTDM
1187 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
1188 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
1189 default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
1190 default 0xfd000000 if ARCH_SPEAR13XX
1191 default 0xfd012000 if ARCH_MV78XX0
1192 default 0xfde12000 if ARCH_DOVE
1193 default 0xfe012000 if ARCH_ORION5X
1194 default 0xf31004c0 if DEBUG_MESON_UARTAO
1195 default 0xfe017000 if DEBUG_MMP_UART2
1196 default 0xfe018000 if DEBUG_MMP_UART3
1197 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
1198 default 0xfe230000 if DEBUG_PICOXCELL_UART
1199 default 0xfe300000 if DEBUG_BCM_KONA_UART
1200 default 0xfe800000 if ARCH_IOP32X
1201 default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HIX5HD2_UART
1202 default 0xfeb24000 if DEBUG_RK3X_UART0
1203 default 0xfeb26000 if DEBUG_RK3X_UART1
1204 default 0xfeb30c00 if DEBUG_KEYSTONE_UART0
1205 default 0xfeb31000 if DEBUG_KEYSTONE_UART1
1206 default 0xfec02000 if DEBUG_SOCFPGA_UART
1207 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
1208 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0
1209 default 0xfec90000 if DEBUG_RK32_UART2
1210 default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1
1211 default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2
1212 default 0xfed60000 if DEBUG_RK29_UART0
1213 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
1214 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
1215 default 0xfedc0000 if ARCH_EP93XX
1216 default 0xfee003f8 if FOOTBRIDGE
1217 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
1218 default 0xfee82340 if ARCH_IOP13XX
1219 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
1220 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1221 default 0xfef36000 if DEBUG_HIGHBANK_UART
1222 default 0xfefff700 if ARCH_IOP33X
1223 default 0xff003000 if DEBUG_U300_UART
1224 default DEBUG_UART_PHYS if !MMU
1225 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1226 DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_MESON_UARTAO || \
1227 DEBUG_MSM_UART || DEBUG_QCOM_UARTDM || DEBUG_S3C24XX_UART
1229 config DEBUG_UART_8250_SHIFT
1230 int "Register offset shift for the 8250 debug UART"
1231 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1232 default 0 if FOOTBRIDGE || ARCH_IOP32X
1235 config DEBUG_UART_8250_WORD
1236 bool "Use 32-bit accesses for 8250 UART"
1237 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1238 depends on DEBUG_UART_8250_SHIFT >= 2
1239 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
1241 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
1242 DEBUG_DAVINCI_DA8XX_UART2 || \
1243 DEBUG_BCM_KONA_UART || DEBUG_RK32_UART2
1245 config DEBUG_UART_8250_FLOW_CONTROL
1246 bool "Enable flow control for 8250 UART"
1247 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1248 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
1250 config DEBUG_UNCOMPRESS
1252 depends on ARCH_MULTIPLATFORM || ARCH_MSM || PLAT_SAMSUNG
1253 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
1254 (!DEBUG_TEGRA_UART || !ZBOOT_ROM)
1256 This option influences the normal decompressor output for
1257 multiplatform kernels. Normally, multiplatform kernels disable
1258 decompressor output because it is not possible to know where to
1259 send the decompressor output.
1261 When this option is set, the selected DEBUG_LL output method
1262 will be re-used for normal decompressor output on multiplatform
1266 config UNCOMPRESS_INCLUDE
1268 default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM || \
1269 PLAT_SAMSUNG || ARCH_EFM32
1270 default "mach/uncompress.h"
1276 Say Y here if you want to have an early console using the
1277 kernel low-level debugging functions. Add earlyprintk to your
1278 kernel parameters to enable this console.
1281 bool "On-chip ETM and ETB"
1284 Enables the on-chip embedded trace macrocell and embedded trace
1285 buffer driver that will allow you to collect traces of the
1288 config ARM_KPROBES_TEST
1289 tristate "Kprobes test module"
1290 depends on KPROBES && MODULES
1292 Perform tests of kprobes API and instruction set simulation.
1294 config PID_IN_CONTEXTIDR
1295 bool "Write the current PID to the CONTEXTIDR register"
1296 depends on CPU_COPY_V6
1298 Enabling this option causes the kernel to write the current PID to
1299 the PROCID field of the CONTEXTIDR register, at the expense of some
1300 additional instructions during context switch. Say Y here only if you
1301 are planning to use hardware trace tools with this kernel.
1303 config DEBUG_SET_MODULE_RONX
1304 bool "Set loadable kernel module data as NX and text as RO"
1307 This option helps catch unintended modifications to loadable
1308 kernel module's text and read-only data. It also prevents execution
1309 of module data. Such protection may interfere with run-time code
1310 patching and dynamic kernel tracing - and they might also protect
1311 against certain classes of kernel exploits.
1312 If in doubt, say "N".