arch/arm/Kconfig.debug

   1 menu "Kernel hacking"
   2
   3 source "lib/Kconfig.debug"
   4
   5 config STRICT_DEVMEM
   6         bool "Filter access to /dev/mem"
   7         depends on MMU
   8         ---help---
   9           If this option is disabled, you allow userspace (root) access to all
  10           of memory, including kernel and userspace memory. Accidental
  11           access to this is obviously disastrous, but specific access can
  12           be used by people debugging the kernel.
  13
  14           If this option is switched on, the /dev/mem file only allows
  15           userspace access to memory mapped peripherals.
  16
  17           If in doubt, say Y.
  18
  19 # RMK wants arm kernels compiled with frame pointers or stack unwinding.
  20 # If you know what you are doing and are willing to live without stack
  21 # traces, you can get a slightly smaller kernel by setting this option to
  22 # n, but then RMK will have to kill you ;).
  23 config FRAME_POINTER
  24         bool
  25         depends on !THUMB2_KERNEL
  26         default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
  27         help
  28           If you say N here, the resulting kernel will be slightly smaller and
  29           faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
  30           when a problem occurs with the kernel, the information that is
  31           reported is severely limited.
  32
  33 config ARM_UNWIND
  34         bool "Enable stack unwinding support (EXPERIMENTAL)"
  35         depends on AEABI
  36         default y
  37         help
  38           This option enables stack unwinding support in the kernel
  39           using the information automatically generated by the
  40           compiler. The resulting kernel image is slightly bigger but
  41           the performance is not affected. Currently, this feature
  42           only works with EABI compilers. If unsure say Y.
  43
  44 config OLD_MCOUNT
  45         bool
  46         depends on FUNCTION_TRACER && FRAME_POINTER
  47         default y
  48
  49 config DEBUG_USER
  50         bool "Verbose user fault messages"
  51         help
  52           When a user program crashes due to an exception, the kernel can
  53           print a brief message explaining what the problem was. This is
  54           sometimes helpful for debugging but serves no purpose on a
  55           production system. Most people should say N here.
  56
  57           In addition, you need to pass user_debug=N on the kernel command
  58           line to enable this feature.  N consists of the sum of:
  59
  60               1 - undefined instruction events
  61               2 - system calls
  62               4 - invalid data aborts
  63               8 - SIGSEGV faults
  64              16 - SIGBUS faults
  65
  66 # These options are only for real kernel hackers who want to get their hands dirty.
  67 config DEBUG_LL
  68         bool "Kernel low-level debugging functions (read help!)"
  69         depends on DEBUG_KERNEL
  70         help
  71           Say Y here to include definitions of printascii, printch, printhex
  72           in the kernel.  This is helpful if you are debugging code that
  73           executes before the console is initialized.
  74
  75           Note that selecting this option will limit the kernel to a single
  76           UART definition, as specified below. Attempting to boot the kernel
  77           image on a different platform *will not work*, so this option should
  78           not be enabled for kernels that are intended to be portable.
  79
  80 choice
  81         prompt "Kernel low-level debugging port"
  82         depends on DEBUG_LL
  83
  84         config AT91_DEBUG_LL_DBGU0
  85                 bool "Kernel low-level debugging on rm9200, 9260/9g20, 9261/9g10 and 9rl"
  86                 depends on HAVE_AT91_DBGU0
  87
  88         config AT91_DEBUG_LL_DBGU1
  89                 bool "Kernel low-level debugging on 9263 and 9g45"
  90                 depends on HAVE_AT91_DBGU1
  91
  92         config DEBUG_BCM2835
  93                 bool "Kernel low-level debugging on BCM2835 PL011 UART"
  94                 depends on ARCH_BCM2835
  95                 select DEBUG_UART_PL01X
  96
  97         config DEBUG_CLPS711X_UART1
  98                 bool "Kernel low-level debugging messages via UART1"
  99                 depends on ARCH_CLPS711X
 100                 help
 101                   Say Y here if you want the debug print routines to direct
 102                   their output to the first serial port on these devices.
 103
 104         config DEBUG_CLPS711X_UART2
 105                 bool "Kernel low-level debugging messages via UART2"
 106                 depends on ARCH_CLPS711X
 107                 help
 108                   Say Y here if you want the debug print routines to direct
 109                   their output to the second serial port on these devices.
 110
 111         config DEBUG_CNS3XXX
 112                 bool "Kernel Kernel low-level debugging on Cavium Networks CNS3xxx"
 113                 depends on ARCH_CNS3XXX
 114                 select DEBUG_UART_PL01X
 115                 help
 116                   Say Y here if you want the debug print routines to direct
 117                   their output to the CNS3xxx UART0.
 118
 119         config DEBUG_DAVINCI_DA8XX_UART1
 120                 bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
 121                 depends on ARCH_DAVINCI_DA8XX
 122                 help
 123                   Say Y here if you want the debug print routines to direct
 124                   their output to UART1 serial port on DaVinci DA8XX devices.
 125
 126         config DEBUG_DAVINCI_DA8XX_UART2
 127                 bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
 128                 depends on ARCH_DAVINCI_DA8XX
 129                 help
 130                   Say Y here if you want the debug print routines to direct
 131                   their output to UART2 serial port on DaVinci DA8XX devices.
 132
 133         config DEBUG_DAVINCI_DMx_UART0
 134                 bool "Kernel low-level debugging on DaVinci DMx using UART0"
 135                 depends on ARCH_DAVINCI_DMx
 136                 help
 137                   Say Y here if you want the debug print routines to direct
 138                   their output to UART0 serial port on DaVinci DMx devices.
 139
 140         config DEBUG_DAVINCI_TNETV107X_UART1
 141                 bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
 142                 depends on ARCH_DAVINCI_TNETV107X
 143                 help
 144                   Say Y here if you want the debug print routines to direct
 145                   their output to UART1 serial port on DaVinci TNETV107X
 146                   devices.
 147
 148         config DEBUG_ZYNQ_UART0
 149                 bool "Kernel low-level debugging on Xilinx Zynq using UART0"
 150                 depends on ARCH_ZYNQ
 151                 help
 152                   Say Y here if you want the debug print routines to direct
 153                   their output to UART0 on the Zynq platform.
 154
 155         config DEBUG_ZYNQ_UART1
 156                 bool "Kernel low-level debugging on Xilinx Zynq using UART1"
 157                 depends on ARCH_ZYNQ
 158                 help
 159                   Say Y here if you want the debug print routines to direct
 160                   their output to UART1 on the Zynq platform.
 161
 162                   If you have a ZC702 board and want early boot messages to
 163                   appear on the USB serial adaptor, select this option.
 164
 165         config DEBUG_DC21285_PORT
 166                 bool "Kernel low-level debugging messages via footbridge serial port"
 167                 depends on FOOTBRIDGE
 168                 help
 169                   Say Y here if you want the debug print routines to direct
 170                   their output to the serial port in the DC21285 (Footbridge).
 171
 172         config DEBUG_FOOTBRIDGE_COM1
 173                 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
 174                 depends on FOOTBRIDGE
 175                 help
 176                   Say Y here if you want the debug print routines to direct
 177                   their output to the 8250 at PCI COM1.
 178
 179         config DEBUG_HIGHBANK_UART
 180                 bool "Kernel low-level debugging messages via Highbank UART"
 181                 depends on ARCH_HIGHBANK
 182                 select DEBUG_UART_PL01X
 183                 help
 184                   Say Y here if you want the debug print routines to direct
 185                   their output to the UART on Highbank based devices.
 186
 187         config DEBUG_IMX1_UART
 188                 bool "i.MX1 Debug UART"
 189                 depends on SOC_IMX1
 190                 help
 191                   Say Y here if you want kernel low-level debugging support
 192                   on i.MX1.
 193
 194         config DEBUG_IMX23_UART
 195                 bool "i.MX23 Debug UART"
 196                 depends on SOC_IMX23
 197                 select DEBUG_UART_PL01X
 198                 help
 199                   Say Y here if you want kernel low-level debugging support
 200                   on i.MX23.
 201
 202         config DEBUG_IMX25_UART
 203                 bool "i.MX25 Debug UART"
 204                 depends on SOC_IMX25
 205                 help
 206                   Say Y here if you want kernel low-level debugging support
 207                   on i.MX25.
 208
 209         config DEBUG_IMX21_IMX27_UART
 210                 bool "i.MX21 and i.MX27 Debug UART"
 211                 depends on SOC_IMX21 || SOC_IMX27
 212                 help
 213                   Say Y here if you want kernel low-level debugging support
 214                   on i.MX21 or i.MX27.
 215
 216         config DEBUG_IMX28_UART
 217                 bool "i.MX28 Debug UART"
 218                 depends on SOC_IMX28
 219                 select DEBUG_UART_PL01X
 220                 help
 221                   Say Y here if you want kernel low-level debugging support
 222                   on i.MX28.
 223
 224         config DEBUG_IMX31_UART
 225                 bool "i.MX31 Debug UART"
 226                 depends on SOC_IMX31
 227                 help
 228                   Say Y here if you want kernel low-level debugging support
 229                   on i.MX31.
 230
 231         config DEBUG_IMX35_UART
 232                 bool "i.MX35 Debug UART"
 233                 depends on SOC_IMX35
 234                 help
 235                   Say Y here if you want kernel low-level debugging support
 236                   on i.MX35.
 237
 238         config DEBUG_IMX51_UART
 239                 bool "i.MX51 Debug UART"
 240                 depends on SOC_IMX51
 241                 help
 242                   Say Y here if you want kernel low-level debugging support
 243                   on i.MX51.
 244
 245         config DEBUG_IMX53_UART
 246                 bool "i.MX53 Debug UART"
 247                 depends on SOC_IMX53
 248                 help
 249                   Say Y here if you want kernel low-level debugging support
 250                   on i.MX53.
 251
 252         config DEBUG_IMX6Q_UART
 253                 bool "i.MX6Q/DL Debug UART"
 254                 depends on SOC_IMX6Q
 255                 help
 256                   Say Y here if you want kernel low-level debugging support
 257                   on i.MX6Q/DL.
 258
 259         config DEBUG_IMX6SL_UART
 260                 bool "i.MX6SL Debug UART"
 261                 depends on SOC_IMX6SL
 262                 help
 263                   Say Y here if you want kernel low-level debugging support
 264                   on i.MX6SL.
 265
 266         config DEBUG_KEYSTONE_UART0
 267                 bool "Kernel low-level debugging on KEYSTONE2 using UART0"
 268                 depends on ARCH_KEYSTONE
 269                 help
 270                   Say Y here if you want the debug print routines to direct
 271                   their output to UART0 serial port on KEYSTONE2 devices.
 272
 273         config DEBUG_KEYSTONE_UART1
 274                 bool "Kernel low-level debugging on KEYSTONE2 using UART1"
 275                 depends on ARCH_KEYSTONE
 276                 help
 277                   Say Y here if you want the debug print routines to direct
 278                   their output to UART1 serial port on KEYSTONE2 devices.
 279
 280         config DEBUG_MMP_UART2
 281                 bool "Kernel low-level debugging message via MMP UART2"
 282                 depends on ARCH_MMP
 283                 select DEBUG_UART_8250
 284                 help
 285                   Say Y here if you want kernel low-level debugging support
 286                   on MMP UART2.
 287
 288         config DEBUG_MMP_UART3
 289                 bool "Kernel low-level debugging message via MMP UART3"
 290                 depends on ARCH_MMP
 291                 select DEBUG_UART_8250
 292                 help
 293                   Say Y here if you want kernel low-level debugging support
 294                   on MMP UART3.
 295
 296         config DEBUG_MSM_UART1
 297                 bool "Kernel low-level debugging messages via MSM UART1"
 298                 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
 299                 help
 300                   Say Y here if you want the debug print routines to direct
 301                   their output to the first serial port on MSM devices.
 302
 303         config DEBUG_MSM_UART2
 304                 bool "Kernel low-level debugging messages via MSM UART2"
 305                 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
 306                 help
 307                   Say Y here if you want the debug print routines to direct
 308                   their output to the second serial port on MSM devices.
 309
 310         config DEBUG_MSM_UART3
 311                 bool "Kernel low-level debugging messages via MSM UART3"
 312                 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
 313                 help
 314                   Say Y here if you want the debug print routines to direct
 315                   their output to the third serial port on MSM devices.
 316
 317         config DEBUG_MSM8660_UART
 318                 bool "Kernel low-level debugging messages via MSM 8660 UART"
 319                 depends on ARCH_MSM8X60
 320                 select MSM_HAS_DEBUG_UART_HS
 321                 help
 322                   Say Y here if you want the debug print routines to direct
 323                   their output to the serial port on MSM 8660 devices.
 324
 325         config DEBUG_MSM8960_UART
 326                 bool "Kernel low-level debugging messages via MSM 8960 UART"
 327                 depends on ARCH_MSM8960
 328                 select MSM_HAS_DEBUG_UART_HS
 329                 help
 330                   Say Y here if you want the debug print routines to direct
 331                   their output to the serial port on MSM 8960 devices.
 332
 333         config DEBUG_MVEBU_UART
 334                 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
 335                 depends on ARCH_MVEBU
 336                 select DEBUG_UART_8250
 337                 help
 338                   Say Y here if you want kernel low-level debugging support
 339                   on MVEBU based platforms.
 340
 341                   This option should be used with the old bootloaders
 342                   that left the internal registers mapped at
 343                   0xd0000000. As of today, this is the case on
 344                   platforms such as the Globalscale Mirabox or the
 345                   Plathome OpenBlocks AX3, when using the original
 346                   bootloader.
 347
 348                   If the wrong DEBUG_MVEBU_UART* option is selected,
 349                   when u-boot hands over to the kernel, the system
 350                   silently crashes, with no serial output at all.
 351
 352         config DEBUG_MVEBU_UART_ALTERNATE
 353                 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
 354                 depends on ARCH_MVEBU
 355                 select DEBUG_UART_8250
 356                 help
 357                   Say Y here if you want kernel low-level debugging support
 358                   on MVEBU based platforms.
 359
 360                   This option should be used with the new bootloaders
 361                   that remap the internal registers at 0xf1000000.
 362
 363                   If the wrong DEBUG_MVEBU_UART* option is selected,
 364                   when u-boot hands over to the kernel, the system
 365                   silently crashes, with no serial output at all.
 366
 367         config DEBUG_NOMADIK_UART
 368                 bool "Kernel low-level debugging messages via NOMADIK UART"
 369                 depends on ARCH_NOMADIK
 370                 select DEBUG_UART_PL01X
 371                 help
 372                   Say Y here if you want kernel low-level debugging support
 373                   on NOMADIK based platforms.
 374
 375         config DEBUG_NSPIRE_CLASSIC_UART
 376                 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
 377                 depends on ARCH_NSPIRE
 378                 select DEBUG_UART_8250
 379                 help
 380                   Say Y here if you want kernel low-level debugging support
 381                   on TI-NSPIRE classic models.
 382
 383         config DEBUG_NSPIRE_CX_UART
 384                 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
 385                 depends on ARCH_NSPIRE
 386                 select DEBUG_UART_PL01X
 387                 help
 388                   Say Y here if you want kernel low-level debugging support
 389                   on TI-NSPIRE CX models.
 390
 391         config DEBUG_OMAP2UART1
 392                 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
 393                 depends on ARCH_OMAP2PLUS
 394                 select DEBUG_OMAP2PLUS_UART
 395                 help
 396                   This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
 397                   omap3 torpedo and 3530 lv som.
 398
 399         config DEBUG_OMAP2UART2
 400                 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2"
 401                 depends on ARCH_OMAP2PLUS
 402                 select DEBUG_OMAP2PLUS_UART
 403
 404         config DEBUG_OMAP2UART3
 405                 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)"
 406                 depends on ARCH_OMAP2PLUS
 407                 select DEBUG_OMAP2PLUS_UART
 408
 409         config DEBUG_OMAP3UART3
 410                 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
 411                 depends on ARCH_OMAP2PLUS
 412                 select DEBUG_OMAP2PLUS_UART
 413                 help
 414                   This covers at least cm_t3x, beagle, crane, devkit8000,
 415                   igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
 416                   and 3517evm.
 417
 418         config DEBUG_OMAP4UART3
 419                 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
 420                 depends on ARCH_OMAP2PLUS
 421                 select DEBUG_OMAP2PLUS_UART
 422
 423         config DEBUG_OMAP3UART4
 424                 bool "Kernel low-level debugging messages via OMAP36XX UART4"
 425                 depends on ARCH_OMAP2PLUS
 426                 select DEBUG_OMAP2PLUS_UART
 427
 428         config DEBUG_OMAP4UART4
 429                 bool "Kernel low-level debugging messages via OMAP4/5 UART4"
 430                 depends on ARCH_OMAP2PLUS
 431                 select DEBUG_OMAP2PLUS_UART
 432
 433         config DEBUG_TI81XXUART1
 434                 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
 435                 depends on ARCH_OMAP2PLUS
 436                 select DEBUG_OMAP2PLUS_UART
 437
 438         config DEBUG_TI81XXUART2
 439                 bool "Kernel low-level debugging messages via TI81XX UART2"
 440                 depends on ARCH_OMAP2PLUS
 441                 select DEBUG_OMAP2PLUS_UART
 442
 443         config DEBUG_TI81XXUART3
 444                 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
 445                 depends on ARCH_OMAP2PLUS
 446                 select DEBUG_OMAP2PLUS_UART
 447
 448         config DEBUG_AM33XXUART1
 449                 bool "Kernel low-level debugging messages via AM33XX UART1"
 450                 depends on ARCH_OMAP2PLUS
 451                 select DEBUG_OMAP2PLUS_UART
 452
 453         config DEBUG_ZOOM_UART
 454                 bool "Kernel low-level debugging messages via Zoom2/3 UART"
 455                 depends on ARCH_OMAP2PLUS
 456                 select DEBUG_OMAP2PLUS_UART
 457
 458         config DEBUG_PICOXCELL_UART
 459                 depends on ARCH_PICOXCELL
 460                 bool "Use PicoXcell UART for low-level debug"
 461                 select DEBUG_UART_8250
 462                 help
 463                   Say Y here if you want kernel low-level debugging support
 464                   on PicoXcell based platforms.
 465
 466         config DEBUG_PXA_UART1
 467                 depends on ARCH_PXA
 468                 bool "Use PXA UART1 for low-level debug"
 469                 select DEBUG_UART_8250
 470                 help
 471                   Say Y here if you want kernel low-level debugging support
 472                   on PXA UART1.
 473
 474         config DEBUG_REALVIEW_STD_PORT
 475                 bool "RealView Default UART"
 476                 depends on ARCH_REALVIEW
 477                 select DEBUG_UART_PL01X
 478                 help
 479                   Say Y here if you want the debug print routines to direct
 480                   their output to the serial port on RealView EB, PB11MP, PBA8
 481                   and PBX platforms.
 482
 483         config DEBUG_REALVIEW_PB1176_PORT
 484                 bool "RealView PB1176 UART"
 485                 depends on MACH_REALVIEW_PB1176
 486                 select DEBUG_UART_PL01X
 487                 help
 488                   Say Y here if you want the debug print routines to direct
 489                   their output to the standard serial port on the RealView
 490                   PB1176 platform.
 491
 492         config DEBUG_RK29_UART0
 493                 bool "Kernel low-level debugging messages via Rockchip RK29 UART0"
 494                 depends on ARCH_ROCKCHIP
 495                 select DEBUG_ROCKCHIP_UART
 496                 select DEBUG_UART_8250
 497                 help
 498                   Say Y here if you want kernel low-level debugging support
 499                   on Rockchip based platforms.
 500
 501         config DEBUG_RK29_UART1
 502                 bool "Kernel low-level debugging messages via Rockchip RK29 UART1"
 503                 depends on ARCH_ROCKCHIP
 504                 select DEBUG_ROCKCHIP_UART
 505                 select DEBUG_UART_8250
 506                 help
 507                   Say Y here if you want kernel low-level debugging support
 508                   on Rockchip based platforms.
 509
 510         config DEBUG_RK29_UART2
 511                 bool "Kernel low-level debugging messages via Rockchip RK29 UART2"
 512                 depends on ARCH_ROCKCHIP
 513                 select DEBUG_ROCKCHIP_UART
 514                 select DEBUG_UART_8250
 515                 help
 516                   Say Y here if you want kernel low-level debugging support
 517                   on Rockchip based platforms.
 518
 519         config DEBUG_RK3X_UART0
 520                 bool "Kernel low-level debugging messages via Rockchip RK3X UART0"
 521                 depends on ARCH_ROCKCHIP
 522                 select DEBUG_ROCKCHIP_UART
 523                 select DEBUG_UART_8250
 524                 help
 525                   Say Y here if you want kernel low-level debugging support
 526                   on Rockchip based platforms.
 527
 528         config DEBUG_RK3X_UART1
 529                 bool "Kernel low-level debugging messages via Rockchip RK3X UART1"
 530                 depends on ARCH_ROCKCHIP
 531                 select DEBUG_ROCKCHIP_UART
 532                 select DEBUG_UART_8250
 533                 help
 534                   Say Y here if you want kernel low-level debugging support
 535                   on Rockchip based platforms.
 536
 537         config DEBUG_RK3X_UART2
 538                 bool "Kernel low-level debugging messages via Rockchip RK3X UART2"
 539                 depends on ARCH_ROCKCHIP
 540                 select DEBUG_ROCKCHIP_UART
 541                 select DEBUG_UART_8250
 542                 help
 543                   Say Y here if you want kernel low-level debugging support
 544                   on Rockchip based platforms.
 545
 546         config DEBUG_RK3X_UART3
 547                 bool "Kernel low-level debugging messages via Rockchip RK3X UART3"
 548                 depends on ARCH_ROCKCHIP
 549                 select DEBUG_ROCKCHIP_UART
 550                 select DEBUG_UART_8250
 551                 help
 552                   Say Y here if you want kernel low-level debugging support
 553                   on Rockchip based platforms.
 554
 555         config DEBUG_S3C_UART0
 556                 depends on PLAT_SAMSUNG
 557                 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
 558                 bool "Use S3C UART 0 for low-level debug"
 559                 help
 560                   Say Y here if you want the debug print routines to direct
 561                   their output to UART 0. The port must have been initialised
 562                   by the boot-loader before use.
 563
 564                   The uncompressor code port configuration is now handled
 565                   by CONFIG_S3C_LOWLEVEL_UART_PORT.
 566
 567         config DEBUG_S3C_UART1
 568                 depends on PLAT_SAMSUNG
 569                 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
 570                 bool "Use S3C UART 1 for low-level debug"
 571                 help
 572                   Say Y here if you want the debug print routines to direct
 573                   their output to UART 1. The port must have been initialised
 574                   by the boot-loader before use.
 575
 576                   The uncompressor code port configuration is now handled
 577                   by CONFIG_S3C_LOWLEVEL_UART_PORT.
 578
 579         config DEBUG_S3C_UART2
 580                 depends on PLAT_SAMSUNG
 581                 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
 582                 bool "Use S3C UART 2 for low-level debug"
 583                 help
 584                   Say Y here if you want the debug print routines to direct
 585                   their output to UART 2. The port must have been initialised
 586                   by the boot-loader before use.
 587
 588                   The uncompressor code port configuration is now handled
 589                   by CONFIG_S3C_LOWLEVEL_UART_PORT.
 590
 591         config DEBUG_S3C_UART3
 592                 depends on PLAT_SAMSUNG && ARCH_EXYNOS
 593                 select DEBUG_EXYNOS_UART
 594                 bool "Use S3C UART 3 for low-level debug"
 595                 help
 596                   Say Y here if you want the debug print routines to direct
 597                   their output to UART 3. The port must have been initialised
 598                   by the boot-loader before use.
 599
 600                   The uncompressor code port configuration is now handled
 601                   by CONFIG_S3C_LOWLEVEL_UART_PORT.
 602
 603         config DEBUG_SOCFPGA_UART
 604                 depends on ARCH_SOCFPGA
 605                 bool "Use SOCFPGA UART for low-level debug"
 606                 select DEBUG_UART_8250
 607                 help
 608                   Say Y here if you want kernel low-level debugging support
 609                   on SOCFPGA based platforms.
 610
 611         config DEBUG_SUNXI_UART0
 612                 bool "Kernel low-level debugging messages via sunXi UART0"
 613                 depends on ARCH_SUNXI
 614                 select DEBUG_UART_8250
 615                 help
 616                   Say Y here if you want kernel low-level debugging support
 617                   on Allwinner A1X based platforms on the UART0.
 618
 619         config DEBUG_SUNXI_UART1
 620                 bool "Kernel low-level debugging messages via sunXi UART1"
 621                 depends on ARCH_SUNXI
 622                 select DEBUG_UART_8250
 623                 help
 624                   Say Y here if you want kernel low-level debugging support
 625                   on Allwinner A1X based platforms on the UART1.
 626
 627         config TEGRA_DEBUG_UART_AUTO_ODMDATA
 628                 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA"
 629                 depends on ARCH_TEGRA
 630                 select DEBUG_TEGRA_UART
 631                 help
 632                   Automatically determines which UART to use for low-level
 633                   debug based on the ODMDATA value. This value is part of
 634                   the BCT, and is written to the boot memory device using
 635                   nvflash, or other flashing tool.  When bits 19:18 are 3,
 636                   then bits 17:15 indicate which UART to use; 0/1/2/3/4
 637                   are UART A/B/C/D/E.
 638
 639         config TEGRA_DEBUG_UARTA
 640                 bool "Kernel low-level debugging messages via Tegra UART A"
 641                 depends on ARCH_TEGRA
 642                 select DEBUG_TEGRA_UART
 643                 help
 644                   Say Y here if you want kernel low-level debugging support
 645                   on Tegra based platforms.
 646
 647         config TEGRA_DEBUG_UARTB
 648                 bool "Kernel low-level debugging messages via Tegra UART B"
 649                 depends on ARCH_TEGRA
 650                 select DEBUG_TEGRA_UART
 651                 help
 652                   Say Y here if you want kernel low-level debugging support
 653                   on Tegra based platforms.
 654
 655         config TEGRA_DEBUG_UARTC
 656                 bool "Kernel low-level debugging messages via Tegra UART C"
 657                 depends on ARCH_TEGRA
 658                 select DEBUG_TEGRA_UART
 659                 help
 660                   Say Y here if you want kernel low-level debugging support
 661                   on Tegra based platforms.
 662
 663         config TEGRA_DEBUG_UARTD
 664                 bool "Kernel low-level debugging messages via Tegra UART D"
 665                 depends on ARCH_TEGRA
 666                 select DEBUG_TEGRA_UART
 667                 help
 668                   Say Y here if you want kernel low-level debugging support
 669                   on Tegra based platforms.
 670
 671         config TEGRA_DEBUG_UARTE
 672                 bool "Kernel low-level debugging messages via Tegra UART E"
 673                 depends on ARCH_TEGRA
 674                 select DEBUG_TEGRA_UART
 675                 help
 676                   Say Y here if you want kernel low-level debugging support
 677                   on Tegra based platforms.
 678
 679         config DEBUG_SIRFPRIMA2_UART1
 680                 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
 681                 depends on ARCH_PRIMA2
 682                 help
 683                   Say Y here if you want the debug print routines to direct
 684                   their output to the uart1 port on SiRFprimaII devices.
 685
 686         config DEBUG_SIRFMARCO_UART1
 687                 bool "Kernel low-level debugging messages via SiRFmarco UART1"
 688                 depends on ARCH_MARCO
 689                 help
 690                   Say Y here if you want the debug print routines to direct
 691                   their output to the uart1 port on SiRFmarco devices.
 692
 693         config STIH41X_DEBUG_ASC2
 694                 bool "Use StiH415/416 ASC2 UART for low-level debug"
 695                 depends on ARCH_STI
 696                 select DEBUG_STI_UART
 697                 help
 698                   Say Y here if you want kernel low-level debugging support
 699                   on STiH415/416 based platforms like b2000, which has
 700                   default UART wired up to ASC2.
 701
 702                   If unsure, say N.
 703
 704         config STIH41X_DEBUG_SBC_ASC1
 705                 bool "Use StiH415/416 SBC ASC1 UART for low-level debug"
 706                 depends on ARCH_STI
 707                 select DEBUG_STI_UART
 708                 help
 709                   Say Y here if you want kernel low-level debugging support
 710                   on STiH415/416 based platforms like b2020. which has
 711                   default UART wired up to SBC ASC1.
 712
 713                   If unsure, say N.
 714
 715         config DEBUG_U300_UART
 716                 bool "Kernel low-level debugging messages via U300 UART0"
 717                 depends on ARCH_U300
 718                 select DEBUG_UART_PL01X
 719                 help
 720                   Say Y here if you want the debug print routines to direct
 721                   their output to the uart port on U300 devices.
 722
 723         config DEBUG_UX500_UART
 724                 depends on ARCH_U8500
 725                 bool "Use Ux500 UART for low-level debug"
 726                 help
 727                   Say Y here if you want kernel low-level debugging support
 728                   on Ux500 based platforms.
 729
 730         config DEBUG_VEXPRESS_UART0_DETECT
 731                 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
 732                 depends on ARCH_VEXPRESS && CPU_CP15_MMU
 733                 help
 734                   This option enables a simple heuristic which tries to determine
 735                   the motherboard's memory map variant (original or RS1) and then
 736                   choose the relevant UART0 base address.
 737
 738                   Note that this will only work with standard A-class core tiles,
 739                   and may fail with non-standard SMM or custom software models.
 740
 741         config DEBUG_VEXPRESS_UART0_CA9
 742                 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
 743                 depends on ARCH_VEXPRESS
 744                 select DEBUG_UART_PL01X
 745                 help
 746                   This option selects UART0 at 0x10009000. Except for custom models,
 747                   this applies only to the V2P-CA9 tile.
 748
 749         config DEBUG_VEXPRESS_UART0_RS1
 750                 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
 751                 depends on ARCH_VEXPRESS
 752                 select DEBUG_UART_PL01X
 753                 help
 754                   This option selects UART0 at 0x1c090000. This applies to most
 755                   of the tiles using the RS1 memory map, including all new A-class
 756                   core tiles, FPGA-based SMMs and software models.
 757
 758         config DEBUG_VEXPRESS_UART0_CRX
 759                 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
 760                 depends on ARCH_VEXPRESS && !MMU
 761                 select DEBUG_UART_PL01X
 762                 help
 763                   This option selects UART0 at 0xb0090000. This is appropriate for
 764                   Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
 765
 766         config DEBUG_VT8500_UART0
 767                 bool "Use UART0 on VIA/Wondermedia SoCs"
 768                 depends on ARCH_VT8500
 769                 help
 770                   This option selects UART0 on VIA/Wondermedia System-on-a-chip
 771                   devices, including VT8500, WM8505, WM8650 and WM8850.
 772
 773         config DEBUG_LL_UART_NONE
 774                 bool "No low-level debugging UART"
 775                 depends on !ARCH_MULTIPLATFORM
 776                 help
 777                   Say Y here if your platform doesn't provide a UART option
 778                   above. This relies on your platform choosing the right UART
 779                   definition internally in order for low-level debugging to
 780                   work.
 781
 782         config DEBUG_ICEDCC
 783                 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
 784                 help
 785                   Say Y here if you want the debug print routines to direct
 786                   their output to the EmbeddedICE macrocell's DCC channel using
 787                   co-processor 14. This is known to work on the ARM9 style ICE
 788                   channel and on the XScale with the PEEDI.
 789
 790                   Note that the system will appear to hang during boot if there
 791                   is nothing connected to read from the DCC.
 792
 793         config DEBUG_SEMIHOSTING
 794                 bool "Kernel low-level debug output via semihosting I/O"
 795                 help
 796                   Semihosting enables code running on an ARM target to use
 797                   the I/O facilities on a host debugger/emulator through a
 798                   simple SVC call. The host debugger or emulator must have
 799                   semihosting enabled for the special svc call to be trapped
 800                   otherwise the kernel will crash.
 801
 802                   This is known to work with OpenOCD, as well as
 803                   ARM's Fast Models, or any other controlling environment
 804                   that implements semihosting.
 805
 806                   For more details about semihosting, please see
 807                   chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
 808
 809         config DEBUG_LL_UART_8250
 810                 bool "Kernel low-level debugging via 8250 UART"
 811                 help
 812                   Say Y here if you wish the debug print routes to direct
 813                   their output to an 8250 UART.  You can use this option
 814                   to provide the parameters for the 8250 UART rather than
 815                   selecting one of the platform specific options above if
 816                   you know the parameters for the port.
 817
 818                   This option is preferred over the platform specific
 819                   options; the platform specific options are deprecated
 820                   and will be soon removed.
 821
 822         config DEBUG_LL_UART_PL01X
 823                 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
 824                 help
 825                   Say Y here if you wish the debug print routes to direct
 826                   their output to a PL01x Primecell UART.  You can use
 827                   this option to provide the parameters for the UART
 828                   rather than selecting one of the platform specific
 829                   options above if you know the parameters for the port.
 830
 831                   This option is preferred over the platform specific
 832                   options; the platform specific options are deprecated
 833                   and will be soon removed.
 834
 835 endchoice
 836
 837 config DEBUG_EXYNOS_UART
 838         bool
 839
 840 config DEBUG_OMAP2PLUS_UART
 841         bool
 842         depends on ARCH_OMAP2PLUS
 843
 844 config DEBUG_IMX_UART_PORT
 845         int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
 846                                                 DEBUG_IMX25_UART || \
 847                                                 DEBUG_IMX21_IMX27_UART || \
 848                                                 DEBUG_IMX31_UART || \
 849                                                 DEBUG_IMX35_UART || \
 850                                                 DEBUG_IMX51_UART || \
 851                                                 DEBUG_IMX53_UART || \
 852                                                 DEBUG_IMX6Q_UART || \
 853                                                 DEBUG_IMX6SL_UART
 854         default 1
 855         depends on ARCH_MXC
 856         help
 857           Choose UART port on which kernel low-level debug messages
 858           should be output.
 859
 860 config DEBUG_ROCKCHIP_UART
 861         bool
 862         depends on ARCH_ROCKCHIP
 863
 864 config DEBUG_TEGRA_UART
 865         bool
 866         depends on ARCH_TEGRA
 867
 868 config DEBUG_STI_UART
 869         bool
 870         depends on ARCH_STI
 871
 872 config DEBUG_LL_INCLUDE
 873         string
 874         default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
 875         default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
 876         default "debug/exynos.S" if DEBUG_EXYNOS_UART
 877         default "debug/icedcc.S" if DEBUG_ICEDCC
 878         default "debug/imx.S" if DEBUG_IMX1_UART || \
 879                                  DEBUG_IMX25_UART || \
 880                                  DEBUG_IMX21_IMX27_UART || \
 881                                  DEBUG_IMX31_UART || \
 882                                  DEBUG_IMX35_UART || \
 883                                  DEBUG_IMX51_UART || \
 884                                  DEBUG_IMX53_UART ||\
 885                                  DEBUG_IMX6Q_UART || \
 886                                  DEBUG_IMX6SL_UART
 887         default "debug/keystone.S" if DEBUG_KEYSTONE_UART0 || \
 888                                       DEBUG_KEYSTONE_UART1
 889         default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
 890         default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
 891         default "debug/sti.S" if DEBUG_STI_UART
 892         default "debug/tegra.S" if DEBUG_TEGRA_UART
 893         default "debug/ux500.S" if DEBUG_UX500_UART
 894         default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT
 895         default "debug/vt8500.S" if DEBUG_VT8500_UART0
 896         default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
 897         default "mach/debug-macro.S"
 898
 899 # Compatibility options for PL01x
 900 config DEBUG_UART_PL01X
 901         def_bool ARCH_EP93XX || \
 902                 ARCH_INTEGRATOR || \
 903                 ARCH_VERSATILE
 904
 905 # Compatibility options for 8250
 906 config DEBUG_UART_8250
 907         def_bool ARCH_DOVE || ARCH_EBSA110 || \
 908                 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
 909                 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
 910                 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \
 911                 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
 912
 913 config DEBUG_UART_PHYS
 914         hex "Physical base address of debug UART"
 915         default 0x01c28000 if DEBUG_SUNXI_UART0
 916         default 0x01c28400 if DEBUG_SUNXI_UART1
 917         default 0x03010fe0 if ARCH_RPC
 918         default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \
 919                                 DEBUG_VEXPRESS_UART0_CA9
 920         default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
 921         default 0x10124000 if DEBUG_RK3X_UART0
 922         default 0x10126000 if DEBUG_RK3X_UART1
 923         default 0x101f1000 if ARCH_VERSATILE
 924         default 0x101fb000 if DEBUG_NOMADIK_UART
 925         default 0x16000000 if ARCH_INTEGRATOR
 926         default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
 927         default 0x20060000 if DEBUG_RK29_UART0
 928         default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
 929         default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
 930         default 0x20201000 if DEBUG_BCM2835
 931         default 0x40090000 if ARCH_LPC32XX
 932         default 0x40100000 if DEBUG_PXA_UART1
 933         default 0x42000000 if ARCH_GEMINI
 934         default 0x7c0003f8 if FOOTBRIDGE
 935         default 0x80230000 if DEBUG_PICOXCELL_UART
 936         default 0x80070000 if DEBUG_IMX23_UART
 937         default 0x80074000 if DEBUG_IMX28_UART
 938         default 0x808c0000 if ARCH_EP93XX
 939         default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
 940         default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
 941         default 0xc0013000 if DEBUG_U300_UART
 942         default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
 943         default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
 944         default 0xd0012000 if DEBUG_MVEBU_UART
 945         default 0xd4017000 if DEBUG_MMP_UART2
 946         default 0xd4018000 if DEBUG_MMP_UART3
 947         default 0xf0000be0 if ARCH_EBSA110
 948         default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE
 949         default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
 950                                 ARCH_ORION5X
 951         default 0xfe800000 if ARCH_IOP32X
 952         default 0xffc02000 if DEBUG_SOCFPGA_UART
 953         default 0xffd82340 if ARCH_IOP13XX
 954         default 0xfff36000 if DEBUG_HIGHBANK_UART
 955         default 0xfffff700 if ARCH_IOP33X
 956         depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
 957                 DEBUG_UART_8250 || DEBUG_UART_PL01X
 958
 959 config DEBUG_UART_VIRT
 960         hex "Virtual base address of debug UART"
 961         default 0xe0010fe0 if ARCH_RPC
 962         default 0xf0000be0 if ARCH_EBSA110
 963         default 0xf0009000 if DEBUG_CNS3XXX
 964         default 0xf01fb000 if DEBUG_NOMADIK_UART
 965         default 0xf0201000 if DEBUG_BCM2835
 966         default 0xf11f1000 if ARCH_VERSATILE
 967         default 0xf1600000 if ARCH_INTEGRATOR
 968         default 0xf1c28000 if DEBUG_SUNXI_UART0
 969         default 0xf1c28400 if DEBUG_SUNXI_UART1
 970         default 0xf2100000 if DEBUG_PXA_UART1
 971         default 0xf4090000 if ARCH_LPC32XX
 972         default 0xf4200000 if ARCH_GEMINI
 973         default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9
 974         default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
 975         default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
 976         default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
 977         default 0xfd012000 if ARCH_MV78XX0
 978         default 0xfde12000 if ARCH_DOVE
 979         default 0xfe012000 if ARCH_ORION5X
 980         default 0xfe017000 if DEBUG_MMP_UART2
 981         default 0xfe018000 if DEBUG_MMP_UART3
 982         default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
 983         default 0xfe230000 if DEBUG_PICOXCELL_UART
 984         default 0xfe800000 if ARCH_IOP32X
 985         default 0xfeb24000 if DEBUG_RK3X_UART0
 986         default 0xfeb26000 if DEBUG_RK3X_UART1
 987         default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE
 988         default 0xfed60000 if DEBUG_RK29_UART0
 989         default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
 990         default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
 991         default 0xfec02000 if DEBUG_SOCFPGA_UART
 992         default 0xfed12000 if ARCH_KIRKWOOD
 993         default 0xfedc0000 if ARCH_EP93XX
 994         default 0xfee003f8 if FOOTBRIDGE
 995         default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
 996         default 0xfee36000 if DEBUG_HIGHBANK_UART
 997         default 0xfee82340 if ARCH_IOP13XX
 998         default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
 999         default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
1000         default 0xfefff700 if ARCH_IOP33X
1001         default 0xff003000 if DEBUG_U300_UART
1002         default DEBUG_UART_PHYS if !MMU
1003         depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
1004                 DEBUG_UART_8250 || DEBUG_UART_PL01X
1005
1006 config DEBUG_UART_8250_SHIFT
1007         int "Register offset shift for the 8250 debug UART"
1008         depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1009         default 0 if FOOTBRIDGE || ARCH_IOP32X
1010         default 2
1011
1012 config DEBUG_UART_8250_WORD
1013         bool "Use 32-bit accesses for 8250 UART"
1014         depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1015         depends on DEBUG_UART_8250_SHIFT >= 2
1016         default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART
1017
1018 config DEBUG_UART_8250_FLOW_CONTROL
1019         bool "Enable flow control for 8250 UART"
1020         depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
1021         default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC
1022
1023 config DEBUG_UNCOMPRESS
1024         bool
1025         depends on ARCH_MULTIPLATFORM
1026         default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
1027                      !DEBUG_TEGRA_UART
1028         help
1029           This option influences the normal decompressor output for
1030           multiplatform kernels.  Normally, multiplatform kernels disable
1031           decompressor output because it is not possible to know where to
1032           send the decompressor output.
1033
1034           When this option is set, the selected DEBUG_LL output method
1035           will be re-used for normal decompressor output on multiplatform
1036           kernels.
1037
1038
1039 config UNCOMPRESS_INCLUDE
1040         string
1041         default "debug/uncompress.h" if ARCH_MULTIPLATFORM
1042         default "mach/uncompress.h"
1043
1044 config EARLY_PRINTK
1045         bool "Early printk"
1046         depends on DEBUG_LL
1047         help
1048           Say Y here if you want to have an early console using the
1049           kernel low-level debugging functions. Add earlyprintk to your
1050           kernel parameters to enable this console.
1051
1052 config OC_ETM
1053         bool "On-chip ETM and ETB"
1054         depends on ARM_AMBA
1055         help
1056           Enables the on-chip embedded trace macrocell and embedded trace
1057           buffer driver that will allow you to collect traces of the
1058           kernel code.
1059
1060 config ARM_KPROBES_TEST
1061         tristate "Kprobes test module"
1062         depends on KPROBES && MODULES
1063         help
1064           Perform tests of kprobes API and instruction set simulation.
1065
1066 config PID_IN_CONTEXTIDR
1067         bool "Write the current PID to the CONTEXTIDR register"
1068         depends on CPU_COPY_V6
1069         help
1070           Enabling this option causes the kernel to write the current PID to
1071           the PROCID field of the CONTEXTIDR register, at the expense of some
1072           additional instructions during context switch. Say Y here only if you
1073           are planning to use hardware trace tools with this kernel.
1074
1075 endmenu