1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
|
menu "Kernel hacking"
source "lib/Kconfig.debug"
config STRICT_DEVMEM
bool "Filter access to /dev/mem"
depends on MMU
---help---
If this option is disabled, you allow userspace (root) access to all
of memory, including kernel and userspace memory. Accidental
access to this is obviously disastrous, but specific access can
be used by people debugging the kernel.
If this option is switched on, the /dev/mem file only allows
userspace access to memory mapped peripherals.
If in doubt, say Y.
# RMK wants arm kernels compiled with frame pointers or stack unwinding.
# If you know what you are doing and are willing to live without stack
# traces, you can get a slightly smaller kernel by setting this option to
# n, but then RMK will have to kill you ;).
config FRAME_POINTER
bool
depends on !THUMB2_KERNEL
default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
help
If you say N here, the resulting kernel will be slightly smaller and
faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
when a problem occurs with the kernel, the information that is
reported is severely limited.
config ARM_UNWIND
bool "Enable stack unwinding support (EXPERIMENTAL)"
depends on AEABI
default y
help
This option enables stack unwinding support in the kernel
using the information automatically generated by the
compiler. The resulting kernel image is slightly bigger but
the performance is not affected. Currently, this feature
only works with EABI compilers. If unsure say Y.
config OLD_MCOUNT
bool
depends on FUNCTION_TRACER && FRAME_POINTER
default y
config DEBUG_USER
bool "Verbose user fault messages"
help
When a user program crashes due to an exception, the kernel can
print a brief message explaining what the problem was. This is
sometimes helpful for debugging but serves no purpose on a
production system. Most people should say N here.
In addition, you need to pass user_debug=N on the kernel command
line to enable this feature. N consists of the sum of:
1 - undefined instruction events
2 - system calls
4 - invalid data aborts
8 - SIGSEGV faults
16 - SIGBUS faults
# These options are only for real kernel hackers who want to get their hands dirty.
config DEBUG_LL
bool "Kernel low-level debugging functions (read help!)"
depends on DEBUG_KERNEL
help
Say Y here to include definitions of printascii, printch, printhex
in the kernel. This is helpful if you are debugging code that
executes before the console is initialized.
Note that selecting this option will limit the kernel to a single
UART definition, as specified below. Attempting to boot the kernel
image on a different platform *will not work*, so this option should
not be enabled for kernels that are intended to be portable.
choice
prompt "Kernel low-level debugging port"
depends on DEBUG_LL
config AT91_DEBUG_LL_DBGU0
bool "Kernel low-level debugging on rm9200, 9260/9g20, 9261/9g10 and 9rl"
depends on HAVE_AT91_DBGU0
config AT91_DEBUG_LL_DBGU1
bool "Kernel low-level debugging on 9263 and 9g45"
depends on HAVE_AT91_DBGU1
config DEBUG_BCM2835
bool "Kernel low-level debugging on BCM2835 PL011 UART"
depends on ARCH_BCM2835
select DEBUG_UART_PL01X
config DEBUG_CLPS711X_UART1
bool "Kernel low-level debugging messages via UART1"
depends on ARCH_CLPS711X
help
Say Y here if you want the debug print routines to direct
their output to the first serial port on these devices.
config DEBUG_CLPS711X_UART2
bool "Kernel low-level debugging messages via UART2"
depends on ARCH_CLPS711X
help
Say Y here if you want the debug print routines to direct
their output to the second serial port on these devices.
config DEBUG_CNS3XXX
bool "Kernel Kernel low-level debugging on Cavium Networks CNS3xxx"
depends on ARCH_CNS3XXX
select DEBUG_UART_PL01X
help
Say Y here if you want the debug print routines to direct
their output to the CNS3xxx UART0.
config DEBUG_DAVINCI_DA8XX_UART1
bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
depends on ARCH_DAVINCI_DA8XX
select DEBUG_UART_8250
help
Say Y here if you want the debug print routines to direct
their output to UART1 serial port on DaVinci DA8XX devices.
config DEBUG_DAVINCI_DA8XX_UART2
bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
depends on ARCH_DAVINCI_DA8XX
select DEBUG_UART_8250
help
Say Y here if you want the debug print routines to direct
their output to UART2 serial port on DaVinci DA8XX devices.
config DEBUG_DAVINCI_DMx_UART0
bool "Kernel low-level debugging on DaVinci DMx using UART0"
depends on ARCH_DAVINCI_DMx
select DEBUG_UART_8250
help
Say Y here if you want the debug print routines to direct
their output to UART0 serial port on DaVinci DMx devices.
config DEBUG_DAVINCI_TNETV107X_UART1
bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
depends on ARCH_DAVINCI_TNETV107X
select DEBUG_UART_8250
help
Say Y here if you want the debug print routines to direct
their output to UART1 serial port on DaVinci TNETV107X
devices.
config DEBUG_ZYNQ_UART0
bool "Kernel low-level debugging on Xilinx Zynq using UART0"
depends on ARCH_ZYNQ
help
Say Y here if you want the debug print routines to direct
their output to UART0 on the Zynq platform.
config DEBUG_ZYNQ_UART1
bool "Kernel low-level debugging on Xilinx Zynq using UART1"
depends on ARCH_ZYNQ
help
Say Y here if you want the debug print routines to direct
their output to UART1 on the Zynq platform.
If you have a ZC702 board and want early boot messages to
appear on the USB serial adaptor, select this option.
config DEBUG_DC21285_PORT
bool "Kernel low-level debugging messages via footbridge serial port"
depends on FOOTBRIDGE
help
Say Y here if you want the debug print routines to direct
their output to the serial port in the DC21285 (Footbridge).
config DEBUG_FOOTBRIDGE_COM1
bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
depends on FOOTBRIDGE
help
Say Y here if you want the debug print routines to direct
their output to the 8250 at PCI COM1.
config DEBUG_HI3620_UART
bool "Hisilicon HI3620 Debug UART"
depends on ARCH_HI3xxx
select DEBUG_UART_PL01X
help
Say Y here if you want kernel low-level debugging support
on HI3620 UART.
config DEBUG_HI3716_UART
bool "Hisilicon Hi3716 Debug UART"
depends on ARCH_HI3xxx
select DEBUG_UART_PL01X
help
Say Y here if you want kernel low-level debugging support
on HI3716 UART.
config DEBUG_HIGHBANK_UART
bool "Kernel low-level debugging messages via Highbank UART"
depends on ARCH_HIGHBANK
select DEBUG_UART_PL01X
help
Say Y here if you want the debug print routines to direct
their output to the UART on Highbank based devices.
config DEBUG_IMX1_UART
bool "i.MX1 Debug UART"
depends on SOC_IMX1
help
Say Y here if you want kernel low-level debugging support
on i.MX1.
config DEBUG_IMX23_UART
bool "i.MX23 Debug UART"
depends on SOC_IMX23
select DEBUG_UART_PL01X
help
Say Y here if you want kernel low-level debugging support
on i.MX23.
config DEBUG_IMX25_UART
bool "i.MX25 Debug UART"
depends on SOC_IMX25
help
Say Y here if you want kernel low-level debugging support
on i.MX25.
config DEBUG_IMX21_IMX27_UART
bool "i.MX21 and i.MX27 Debug UART"
depends on SOC_IMX21 || SOC_IMX27
help
Say Y here if you want kernel low-level debugging support
on i.MX21 or i.MX27.
config DEBUG_IMX28_UART
bool "i.MX28 Debug UART"
depends on SOC_IMX28
select DEBUG_UART_PL01X
help
Say Y here if you want kernel low-level debugging support
on i.MX28.
config DEBUG_IMX31_UART
bool "i.MX31 Debug UART"
depends on SOC_IMX31
help
Say Y here if you want kernel low-level debugging support
on i.MX31.
config DEBUG_IMX35_UART
bool "i.MX35 Debug UART"
depends on SOC_IMX35
help
Say Y here if you want kernel low-level debugging support
on i.MX35.
config DEBUG_IMX51_UART
bool "i.MX51 Debug UART"
depends on SOC_IMX51
help
Say Y here if you want kernel low-level debugging support
on i.MX51.
config DEBUG_IMX53_UART
bool "i.MX53 Debug UART"
depends on SOC_IMX53
help
Say Y here if you want kernel low-level debugging support
on i.MX53.
config DEBUG_IMX6Q_UART
bool "i.MX6Q/DL Debug UART"
depends on SOC_IMX6Q
help
Say Y here if you want kernel low-level debugging support
on i.MX6Q/DL.
config DEBUG_IMX6SL_UART
bool "i.MX6SL Debug UART"
depends on SOC_IMX6SL
help
Say Y here if you want kernel low-level debugging support
on i.MX6SL.
config DEBUG_KEYSTONE_UART0
bool "Kernel low-level debugging on KEYSTONE2 using UART0"
depends on ARCH_KEYSTONE
select DEBUG_UART_8250
help
Say Y here if you want the debug print routines to direct
their output to UART0 serial port on KEYSTONE2 devices.
config DEBUG_KEYSTONE_UART1
bool "Kernel low-level debugging on KEYSTONE2 using UART1"
depends on ARCH_KEYSTONE
select DEBUG_UART_8250
help
Say Y here if you want the debug print routines to direct
their output to UART1 serial port on KEYSTONE2 devices.
config DEBUG_MMP_UART2
bool "Kernel low-level debugging message via MMP UART2"
depends on ARCH_MMP
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on MMP UART2.
config DEBUG_MMP_UART3
bool "Kernel low-level debugging message via MMP UART3"
depends on ARCH_MMP
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on MMP UART3.
config DEBUG_MSM_UART1
bool "Kernel low-level debugging messages via MSM UART1"
depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
select DEBUG_MSM_UART
help
Say Y here if you want the debug print routines to direct
their output to the first serial port on MSM devices.
config DEBUG_MSM_UART2
bool "Kernel low-level debugging messages via MSM UART2"
depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
select DEBUG_MSM_UART
help
Say Y here if you want the debug print routines to direct
their output to the second serial port on MSM devices.
config DEBUG_MSM_UART3
bool "Kernel low-level debugging messages via MSM UART3"
depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
select DEBUG_MSM_UART
help
Say Y here if you want the debug print routines to direct
their output to the third serial port on MSM devices.
config DEBUG_MSM8660_UART
bool "Kernel low-level debugging messages via MSM 8660 UART"
depends on ARCH_MSM8X60
select MSM_HAS_DEBUG_UART_HS
select DEBUG_MSM_UART
help
Say Y here if you want the debug print routines to direct
their output to the serial port on MSM 8660 devices.
config DEBUG_MSM8960_UART
bool "Kernel low-level debugging messages via MSM 8960 UART"
depends on ARCH_MSM8960
select MSM_HAS_DEBUG_UART_HS
select DEBUG_MSM_UART
help
Say Y here if you want the debug print routines to direct
their output to the serial port on MSM 8960 devices.
config DEBUG_MSM8974_UART
bool "Kernel low-level debugging messages via MSM 8974 UART"
depends on ARCH_MSM8974
select MSM_HAS_DEBUG_UART_HS
select DEBUG_MSM_UART
help
Say Y here if you want the debug print routines to direct
their output to the serial port on MSM 8974 devices.
config DEBUG_MVEBU_UART
bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
depends on ARCH_MVEBU
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on MVEBU based platforms.
This option should be used with the old bootloaders
that left the internal registers mapped at
0xd0000000. As of today, this is the case on
platforms such as the Globalscale Mirabox or the
Plathome OpenBlocks AX3, when using the original
bootloader.
If the wrong DEBUG_MVEBU_UART* option is selected,
when u-boot hands over to the kernel, the system
silently crashes, with no serial output at all.
config DEBUG_MVEBU_UART_ALTERNATE
bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
depends on ARCH_MVEBU
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on MVEBU based platforms.
This option should be used with the new bootloaders
that remap the internal registers at 0xf1000000.
If the wrong DEBUG_MVEBU_UART* option is selected,
when u-boot hands over to the kernel, the system
silently crashes, with no serial output at all.
config DEBUG_VF_UART
bool "Vybrid UART"
depends on SOC_VF610
help
Say Y here if you want kernel low-level debugging support
on Vybrid based platforms.
config DEBUG_NOMADIK_UART
bool "Kernel low-level debugging messages via NOMADIK UART"
depends on ARCH_NOMADIK
select DEBUG_UART_PL01X
help
Say Y here if you want kernel low-level debugging support
on NOMADIK based platforms.
config DEBUG_NSPIRE_CLASSIC_UART
bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
depends on ARCH_NSPIRE
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on TI-NSPIRE classic models.
config DEBUG_NSPIRE_CX_UART
bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
depends on ARCH_NSPIRE
select DEBUG_UART_PL01X
help
Say Y here if you want kernel low-level debugging support
on TI-NSPIRE CX models.
config DEBUG_OMAP2UART1
bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
help
This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
omap3 torpedo and 3530 lv som.
config DEBUG_OMAP2UART2
bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
config DEBUG_OMAP2UART3
bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
config DEBUG_OMAP3UART3
bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
help
This covers at least cm_t3x, beagle, crane, devkit8000,
igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
and 3517evm.
config DEBUG_OMAP4UART3
bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
config DEBUG_OMAP3UART4
bool "Kernel low-level debugging messages via OMAP36XX UART4"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
config DEBUG_OMAP4UART4
bool "Kernel low-level debugging messages via OMAP4/5 UART4"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
config DEBUG_TI81XXUART1
bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
config DEBUG_TI81XXUART2
bool "Kernel low-level debugging messages via TI81XX UART2"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
config DEBUG_TI81XXUART3
bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
config DEBUG_AM33XXUART1
bool "Kernel low-level debugging messages via AM33XX UART1"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
config DEBUG_ZOOM_UART
bool "Kernel low-level debugging messages via Zoom2/3 UART"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
config DEBUG_PICOXCELL_UART
depends on ARCH_PICOXCELL
bool "Use PicoXcell UART for low-level debug"
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on PicoXcell based platforms.
config DEBUG_PXA_UART1
depends on ARCH_PXA
bool "Use PXA UART1 for low-level debug"
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on PXA UART1.
config DEBUG_REALVIEW_STD_PORT
bool "RealView Default UART"
depends on ARCH_REALVIEW
select DEBUG_UART_PL01X
help
Say Y here if you want the debug print routines to direct
their output to the serial port on RealView EB, PB11MP, PBA8
and PBX platforms.
config DEBUG_REALVIEW_PB1176_PORT
bool "RealView PB1176 UART"
depends on MACH_REALVIEW_PB1176
select DEBUG_UART_PL01X
help
Say Y here if you want the debug print routines to direct
their output to the standard serial port on the RealView
PB1176 platform.
config DEBUG_RK29_UART0
bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
depends on ARCH_ROCKCHIP
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on Rockchip based platforms.
config DEBUG_RK29_UART1
bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
depends on ARCH_ROCKCHIP
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on Rockchip based platforms.
config DEBUG_RK29_UART2
bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
depends on ARCH_ROCKCHIP
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on Rockchip based platforms.
config DEBUG_RK3X_UART0
bool "Kernel low-level debugging messages via Rockchip RK3X UART0"
depends on ARCH_ROCKCHIP
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on Rockchip based platforms.
config DEBUG_RK3X_UART1
bool "Kernel low-level debugging messages via Rockchip RK3X UART1"
depends on ARCH_ROCKCHIP
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on Rockchip based platforms.
config DEBUG_RK3X_UART2
bool "Kernel low-level debugging messages via Rockchip RK3X UART2"
depends on ARCH_ROCKCHIP
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on Rockchip based platforms.
config DEBUG_RK3X_UART3
bool "Kernel low-level debugging messages via Rockchip RK3X UART3"
depends on ARCH_ROCKCHIP
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on Rockchip based platforms.
config DEBUG_S3C_UART0
depends on PLAT_SAMSUNG
select DEBUG_EXYNOS_UART if ARCH_EXYNOS
bool "Use S3C UART 0 for low-level debug"
help
Say Y here if you want the debug print routines to direct
their output to UART 0. The port must have been initialised
by the boot-loader before use.
The uncompressor code port configuration is now handled
by CONFIG_S3C_LOWLEVEL_UART_PORT.
config DEBUG_S3C_UART1
depends on PLAT_SAMSUNG
select DEBUG_EXYNOS_UART if ARCH_EXYNOS
bool "Use S3C UART 1 for low-level debug"
help
Say Y here if you want the debug print routines to direct
their output to UART 1. The port must have been initialised
by the boot-loader before use.
The uncompressor code port configuration is now handled
by CONFIG_S3C_LOWLEVEL_UART_PORT.
config DEBUG_S3C_UART2
depends on PLAT_SAMSUNG
select DEBUG_EXYNOS_UART if ARCH_EXYNOS
bool "Use S3C UART 2 for low-level debug"
help
Say Y here if you want the debug print routines to direct
their output to UART 2. The port must have been initialised
by the boot-loader before use.
The uncompressor code port configuration is now handled
by CONFIG_S3C_LOWLEVEL_UART_PORT.
config DEBUG_S3C_UART3
depends on PLAT_SAMSUNG && ARCH_EXYNOS
select DEBUG_EXYNOS_UART
bool "Use S3C UART 3 for low-level debug"
help
Say Y here if you want the debug print routines to direct
their output to UART 3. The port must have been initialised
by the boot-loader before use.
The uncompressor code port configuration is now handled
by CONFIG_S3C_LOWLEVEL_UART_PORT.
config DEBUG_SOCFPGA_UART
depends on ARCH_SOCFPGA
bool "Use SOCFPGA UART for low-level debug"
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on SOCFPGA based platforms.
config DEBUG_SUNXI_UART0
bool "Kernel low-level debugging messages via sunXi UART0"
depends on ARCH_SUNXI
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on Allwinner A1X based platforms on the UART0.
config DEBUG_SUNXI_UART1
bool "Kernel low-level debugging messages via sunXi UART1"
depends on ARCH_SUNXI
select DEBUG_UART_8250
help
Say Y here if you want kernel low-level debugging support
on Allwinner A1X based platforms on the UART1.
config TEGRA_DEBUG_UART_AUTO_ODMDATA
bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
depends on ARCH_TEGRA
select DEBUG_TEGRA_UART
help
Automatically determines which UART to use for low-level
debug based on the ODMDATA value. This value is part of
the BCT, and is written to the boot memory device using
nvflash, or other flashing tool. When bits 19:18 are 3,
then bits 17:15 indicate which UART to use; 0/1/2/3/4
are UART A/B/C/D/E.
config TEGRA_DEBUG_UARTA
bool "Kernel low-level debugging messages via Tegra UART A"
depends on ARCH_TEGRA
select DEBUG_TEGRA_UART
help
Say Y here if you want kernel low-level debugging support
on Tegra based platforms.
config TEGRA_DEBUG_UARTB
bool "Kernel low-level debugging messages via Tegra UART B"
depends on ARCH_TEGRA
select DEBUG_TEGRA_UART
help
Say Y here if you want kernel low-level debugging support
on Tegra based platforms.
config TEGRA_DEBUG_UARTC
bool "Kernel low-level debugging messages via Tegra UART C"
depends on ARCH_TEGRA
select DEBUG_TEGRA_UART
help
Say Y here if you want kernel low-level debugging support
on Tegra based platforms.
config TEGRA_DEBUG_UARTD
bool "Kernel low-level debugging messages via Tegra UART D"
depends on ARCH_TEGRA
select DEBUG_TEGRA_UART
help
Say Y here if you want kernel low-level debugging support
on Tegra based platforms.
config TEGRA_DEBUG_UARTE
bool "Kernel low-level debugging messages via Tegra UART E"
depends on ARCH_TEGRA
select DEBUG_TEGRA_UART
help
Say Y here if you want kernel low-level debugging support
on Tegra based platforms.
config DEBUG_SIRFPRIMA2_UART1
bool "Kernel low-level debugging messages via SiRFprimaII UART1"
depends on ARCH_PRIMA2
help
Say Y here if you want the debug print routines to direct
their output to the uart1 port on SiRFprimaII devices.
config DEBUG_SIRFMARCO_UART1
bool "Kernel low-level debugging messages via SiRFmarco UART1"
depends on ARCH_MARCO
help
Say Y here if you want the debug print routines to direct
their output to the uart1 port on SiRFmarco devices.
config STIH41X_DEBUG_ASC2
bool "Use StiH415/416 ASC2 UART for low-level debug"
depends on ARCH_STI
select DEBUG_STI_UART
help
Say Y here if you want kernel low-level debugging support
on STiH415/416 based platforms like b2000, which has
default UART wired up to ASC2.
If unsure, say N.
config STIH41X_DEBUG_SBC_ASC1
bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
depends on ARCH_STI
select DEBUG_STI_UART
help
Say Y here if you want kernel low-level debugging support
on STiH415/416 based platforms like b2020. which has
default UART wired up to SBC ASC1.
If unsure, say N.
config DEBUG_U300_UART
bool "Kernel low-level debugging messages via U300 UART0"
depends on ARCH_U300
select DEBUG_UART_PL01X
help
Say Y here if you want the debug print routines to direct
their output to the uart port on U300 devices.
config DEBUG_UX500_UART
depends on ARCH_U8500
bool "Use Ux500 UART for low-level debug"
help
Say Y here if you want kernel low-level debugging support
on Ux500 based platforms.
config DEBUG_VEXPRESS_UART0_DETECT
bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
depends on ARCH_VEXPRESS && CPU_CP15_MMU
help
This option enables a simple heuristic which tries to determine
the motherboard's memory map variant (original or RS1) and then
choose the relevant UART0 base address.
Note that this will only work with standard A-class core tiles,
and may fail with non-standard SMM or custom software models.
config DEBUG_VEXPRESS_UART0_CA9
bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
depends on ARCH_VEXPRESS
select DEBUG_UART_PL01X
help
This option selects UART0 at 0x10009000. Except for custom models,
this applies only to the V2P-CA9 tile.
config DEBUG_VEXPRESS_UART0_RS1
bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
depends on ARCH_VEXPRESS
select DEBUG_UART_PL01X
help
This option selects UART0 at 0x1c090000. This applies to most
of the tiles using the RS1 memory map, including all new A-class
core tiles, FPGA-based SMMs and software models.
config DEBUG_VEXPRESS_UART0_CRX
bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
depends on ARCH_VEXPRESS && !MMU
select DEBUG_UART_PL01X
help
This option selects UART0 at 0xb0090000. This is appropriate for
Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
config DEBUG_VT8500_UART0
bool "Use UART0 on VIA/Wondermedia SoCs"
depends on ARCH_VT8500
help
This option selects UART0 on VIA/Wondermedia System-on-a-chip
devices, including VT8500, WM8505, WM8650 and WM8850.
config DEBUG_LL_UART_NONE
bool "No low-level debugging UART"
depends on !ARCH_MULTIPLATFORM
help
Say Y here if your platform doesn't provide a UART option
above. This relies on your platform choosing the right UART
definition internally in order for low-level debugging to
work.
config DEBUG_ICEDCC
bool "Kernel low-level debugging via EmbeddedICE DCC channel"
help
Say Y here if you want the debug print routines to direct
their output to the EmbeddedICE macrocell's DCC channel using
co-processor 14. This is known to work on the ARM9 style ICE
channel and on the XScale with the PEEDI.
Note that the system will appear to hang during boot if there
is nothing connected to read from the DCC.
config DEBUG_SEMIHOSTING
bool "Kernel low-level debug output via semihosting I/O"
help
Semihosting enables code running on an ARM target to use
the I/O facilities on a host debugger/emulator through a
simple SVC call. The host debugger or emulator must have
semihosting enabled for the special svc call to be trapped
otherwise the kernel will crash.
This is known to work with OpenOCD, as well as
ARM's Fast Models, or any other controlling environment
that implements semihosting.
For more details about semihosting, please see
chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
config DEBUG_LL_UART_8250
bool "Kernel low-level debugging via 8250 UART"
help
Say Y here if you wish the debug print routes to direct
their output to an 8250 UART. You can use this option
to provide the parameters for the 8250 UART rather than
selecting one of the platform specific options above if
you know the parameters for the port.
This option is preferred over the platform specific
options; the platform specific options are deprecated
and will be soon removed.
config DEBUG_LL_UART_EFM32
bool "Kernel low-level debugging via efm32 UART"
depends on ARCH_EFM32
help
Say Y here if you want the debug print routines to direct
their output to an UART or USART port on efm32 based
machines. Use the following addresses for DEBUG_UART_PHYS:
0x4000c000 | USART0
0x4000c400 | USART1
0x4000c800 | USART2
0x4000e000 | UART0
0x4000e400 | UART1
config DEBUG_LL_UART_PL01X
bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
help
Say Y here if you wish the debug print routes to direct
their output to a PL01x Primecell UART. You can use
this option to provide the parameters for the UART
rather than selecting one of the platform specific
options above if you know the parameters for the port.
This option is preferred over the platform specific
options; the platform specific options are deprecated
and will be soon removed.
endchoice
config DEBUG_EXYNOS_UART
bool
config DEBUG_OMAP2PLUS_UART
bool
depends on ARCH_OMAP2PLUS
config DEBUG_IMX_UART_PORT
int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
DEBUG_IMX25_UART || \
DEBUG_IMX21_IMX27_UART || \
DEBUG_IMX31_UART || \
DEBUG_IMX35_UART || \
DEBUG_IMX51_UART || \
DEBUG_IMX53_UART || \
DEBUG_IMX6Q_UART || \
DEBUG_IMX6SL_UART
default 1
depends on ARCH_MXC
help
Choose UART port on which kernel low-level debug messages
should be output.
config DEBUG_TEGRA_UART
bool
depends on ARCH_TEGRA
config DEBUG_STI_UART
bool
depends on ARCH_STI
config DEBUG_MSM_UART
bool
depends on ARCH_MSM
config DEBUG_LL_INCLUDE
string
default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
default "debug/exynos.S" if DEBUG_EXYNOS_UART
default "debug/efm32.S" if DEBUG_LL_UART_EFM32
default "debug/icedcc.S" if DEBUG_ICEDCC
default "debug/imx.S" if DEBUG_IMX1_UART || \
DEBUG_IMX25_UART || \
DEBUG_IMX21_IMX27_UART || \
DEBUG_IMX31_UART || \
DEBUG_IMX35_UART || \
DEBUG_IMX51_UART || \
DEBUG_IMX53_UART ||\
DEBUG_IMX6Q_UART || \
DEBUG_IMX6SL_UART
default "debug/msm.S" if DEBUG_MSM_UART
default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
default "debug/sti.S" if DEBUG_STI_UART
default "debug/tegra.S" if DEBUG_TEGRA_UART
default "debug/ux500.S" if DEBUG_UX500_UART
default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
default "debug/vf.S" if DEBUG_VF_UART
default "debug/vt8500.S" if DEBUG_VT8500_UART0
default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
default "mach/debug-macro.S"
# Compatibility options for PL01x
config DEBUG_UART_PL01X
def_bool ARCH_EP93XX || \
ARCH_INTEGRATOR || \
ARCH_SPEAR3XX || \
ARCH_SPEAR6XX || \
ARCH_SPEAR13XX || \
ARCH_VERSATILE
# Compatibility options for 8250
config DEBUG_UART_8250
def_bool ARCH_DOVE || ARCH_EBSA110 || \
(FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \
ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
config DEBUG_UART_PHYS
hex "Physical base address of debug UART"
default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0
default 0x01c28000 if DEBUG_SUNXI_UART0
default 0x01c28400 if DEBUG_SUNXI_UART1
default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1
default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2
default 0x02530c00 if DEBUG_KEYSTONE_UART0
default 0x02531000 if DEBUG_KEYSTONE_UART1
default 0x03010fe0 if ARCH_RPC
default 0x08108300 if DEBUG_DAVINCI_TNETV107X_UART1
default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
DEBUG_VEXPRESS_UART0_CA9
default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
default 0x10124000 if DEBUG_RK3X_UART0
default 0x10126000 if DEBUG_RK3X_UART1
default 0x101f1000 if ARCH_VERSATILE
default 0x101fb000 if DEBUG_NOMADIK_UART
default 0x16000000 if ARCH_INTEGRATOR
default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
default 0x20060000 if DEBUG_RK29_UART0
default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
default 0x20201000 if DEBUG_BCM2835
default 0x4000e400 if DEBUG_LL_UART_EFM32
default 0x40090000 if ARCH_LPC32XX
default 0x40100000 if DEBUG_PXA_UART1
default 0x42000000 if ARCH_GEMINI
default 0x7c0003f8 if FOOTBRIDGE
default 0x80230000 if DEBUG_PICOXCELL_UART
default 0x80070000 if DEBUG_IMX23_UART
default 0x80074000 if DEBUG_IMX28_UART
default 0x808c0000 if ARCH_EP93XX
default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
default 0xc0013000 if DEBUG_U300_UART
default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
default 0xd0012000 if DEBUG_MVEBU_UART
default 0xd4017000 if DEBUG_MMP_UART2
default 0xd4018000 if DEBUG_MMP_UART3
default 0xe0000000 if ARCH_SPEAR13XX
default 0xf0000be0 if ARCH_EBSA110
default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
ARCH_ORION5X
default 0xf8b00000 if DEBUG_HI3716_UART
default 0xfcb00000 if DEBUG_HI3620_UART
default 0xfe800000 if ARCH_IOP32X
default 0xffc02000 if DEBUG_SOCFPGA_UART
default 0xffd82340 if ARCH_IOP13XX
default 0xfff36000 if DEBUG_HIGHBANK_UART
default 0xfffff700 if ARCH_IOP33X
depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
DEBUG_LL_UART_EFM32 || \
DEBUG_UART_8250 || DEBUG_UART_PL01X
config DEBUG_UART_VIRT
hex "Virtual base address of debug UART"
default 0xe0010fe0 if ARCH_RPC
default 0xf0000be0 if ARCH_EBSA110
default 0xf0009000 if DEBUG_CNS3XXX
default 0xf01fb000 if DEBUG_NOMADIK_UART
default 0xf0201000 if DEBUG_BCM2835
default 0xf11f1000 if ARCH_VERSATILE
default 0xf1600000 if ARCH_INTEGRATOR
default 0xf1c28000 if DEBUG_SUNXI_UART0
default 0xf1c28400 if DEBUG_SUNXI_UART1
default 0xf2100000 if DEBUG_PXA_UART1
default 0xf4090000 if ARCH_LPC32XX
default 0xf4200000 if ARCH_GEMINI
default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
default 0xfd000000 if ARCH_SPEAR13XX
default 0xfd012000 if ARCH_MV78XX0
default 0xfde12000 if ARCH_DOVE
default 0xfe012000 if ARCH_ORION5X
default 0xfe017000 if DEBUG_MMP_UART2
default 0xfe018000 if DEBUG_MMP_UART3
default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
default 0xfe230000 if DEBUG_PICOXCELL_UART
default 0xfe800000 if ARCH_IOP32X
default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HI3716_UART
default 0xfeb24000 if DEBUG_RK3X_UART0
default 0xfeb26000 if DEBUG_RK3X_UART1
default 0xfeb30c00 if DEBUG_KEYSTONE_UART0
default 0xfeb31000 if DEBUG_KEYSTONE_UART1
default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
default 0xfed60000 if DEBUG_RK29_UART0
default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
default 0xfec02000 if DEBUG_SOCFPGA_UART
default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0
default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1
default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2
default 0xfed12000 if ARCH_KIRKWOOD
default 0xfedc0000 if ARCH_EP93XX
default 0xfee003f8 if FOOTBRIDGE
default 0xfee08300 if DEBUG_DAVINCI_TNETV107X_UART1
default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
default 0xfef36000 if DEBUG_HIGHBANK_UART
default 0xfee82340 if ARCH_IOP13XX
default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
default 0xfefff700 if ARCH_IOP33X
default 0xff003000 if DEBUG_U300_UART
default DEBUG_UART_PHYS if !MMU
depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
DEBUG_UART_8250 || DEBUG_UART_PL01X
config DEBUG_UART_8250_SHIFT
int "Register offset shift for the 8250 debug UART"
depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
default 0 if FOOTBRIDGE || ARCH_IOP32X
default 2
config DEBUG_UART_8250_WORD
bool "Use 32-bit accesses for 8250 UART"
depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
depends on DEBUG_UART_8250_SHIFT >= 2
default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
ARCH_KEYSTONE || \
DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
DEBUG_DAVINCI_DA8XX_UART2 || DEBUG_DAVINCI_TNETV107X_UART1
config DEBUG_UART_8250_FLOW_CONTROL
bool "Enable flow control for 8250 UART"
depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
config DEBUG_UNCOMPRESS
bool
depends on ARCH_MULTIPLATFORM || ARCH_MSM
default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
(!DEBUG_TEGRA_UART || !ZBOOT_ROM)
help
This option influences the normal decompressor output for
multiplatform kernels. Normally, multiplatform kernels disable
decompressor output because it is not possible to know where to
send the decompressor output.
When this option is set, the selected DEBUG_LL output method
will be re-used for normal decompressor output on multiplatform
kernels.
config UNCOMPRESS_INCLUDE
string
default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM
default "mach/uncompress.h"
config EARLY_PRINTK
bool "Early printk"
depends on DEBUG_LL
help
Say Y here if you want to have an early console using the
kernel low-level debugging functions. Add earlyprintk to your
kernel parameters to enable this console.
config OC_ETM
bool "On-chip ETM and ETB"
depends on ARM_AMBA
help
Enables the on-chip embedded trace macrocell and embedded trace
buffer driver that will allow you to collect traces of the
kernel code.
config ARM_KPROBES_TEST
tristate "Kprobes test module"
depends on KPROBES && MODULES
help
Perform tests of kprobes API and instruction set simulation.
config PID_IN_CONTEXTIDR
bool "Write the current PID to the CONTEXTIDR register"
depends on CPU_COPY_V6
help
Enabling this option causes the kernel to write the current PID to
the PROCID field of the CONTEXTIDR register, at the expense of some
additional instructions during context switch. Say Y here only if you
are planning to use hardware trace tools with this kernel.
endmenu
|