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
  96         config DEBUG_CLPS711X_UART1
  97                 bool "Kernel low-level debugging messages via UART1"
  98                 depends on ARCH_CLPS711X
  99                 help
 100                   Say Y here if you want the debug print routines to direct
 101                   their output to the first serial port on these devices.
 102
 103         config DEBUG_CLPS711X_UART2
 104                 bool "Kernel low-level debugging messages via UART2"
 105                 depends on ARCH_CLPS711X
 106                 help
 107                   Say Y here if you want the debug print routines to direct
 108                   their output to the second serial port on these devices.
 109
 110         config DEBUG_CNS3XXX
 111                 bool "Kernel Kernel low-level debugging on Cavium Networks CNS3xxx"
 112                 depends on ARCH_CNS3XXX
 113                 help
 114                   Say Y here if you want the debug print routines to direct
 115                   their output to the CNS3xxx UART0.
 116
 117         config DEBUG_DAVINCI_DA8XX_UART1
 118                 bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
 119                 depends on ARCH_DAVINCI_DA8XX
 120                 help
 121                   Say Y here if you want the debug print routines to direct
 122                   their output to UART1 serial port on DaVinci DA8XX devices.
 123
 124         config DEBUG_DAVINCI_DA8XX_UART2
 125                 bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
 126                 depends on ARCH_DAVINCI_DA8XX
 127                 help
 128                   Say Y here if you want the debug print routines to direct
 129                   their output to UART2 serial port on DaVinci DA8XX devices.
 130
 131         config DEBUG_DAVINCI_DMx_UART0
 132                 bool "Kernel low-level debugging on DaVinci DMx using UART0"
 133                 depends on ARCH_DAVINCI_DMx
 134                 help
 135                   Say Y here if you want the debug print routines to direct
 136                   their output to UART0 serial port on DaVinci DMx devices.
 137
 138         config DEBUG_DAVINCI_TNETV107X_UART1
 139                 bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
 140                 depends on ARCH_DAVINCI_TNETV107X
 141                 help
 142                   Say Y here if you want the debug print routines to direct
 143                   their output to UART1 serial port on DaVinci TNETV107X
 144                   devices.
 145
 146         config DEBUG_ZYNQ_UART0
 147                 bool "Kernel low-level debugging on Xilinx Zynq using UART0"
 148                 depends on ARCH_ZYNQ
 149                 help
 150                   Say Y here if you want the debug print routines to direct
 151                   their output to UART0 on the Zynq platform.
 152
 153         config DEBUG_ZYNQ_UART1
 154                 bool "Kernel low-level debugging on Xilinx Zynq using UART1"
 155                 depends on ARCH_ZYNQ
 156                 help
 157                   Say Y here if you want the debug print routines to direct
 158                   their output to UART1 on the Zynq platform.
 159
 160                   If you have a ZC702 board and want early boot messages to
 161                   appear on the USB serial adaptor, select this option.
 162
 163         config DEBUG_DC21285_PORT
 164                 bool "Kernel low-level debugging messages via footbridge serial port"
 165                 depends on FOOTBRIDGE
 166                 help
 167                   Say Y here if you want the debug print routines to direct
 168                   their output to the serial port in the DC21285 (Footbridge).
 169
 170         config DEBUG_FOOTBRIDGE_COM1
 171                 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
 172                 depends on FOOTBRIDGE
 173                 help
 174                   Say Y here if you want the debug print routines to direct
 175                   their output to the 8250 at PCI COM1.
 176
 177         config DEBUG_HIGHBANK_UART
 178                 bool "Kernel low-level debugging messages via Highbank UART"
 179                 depends on ARCH_HIGHBANK
 180                 help
 181                   Say Y here if you want the debug print routines to direct
 182                   their output to the UART on Highbank based devices.
 183
 184         config DEBUG_IMX1_UART
 185                 bool "i.MX1 Debug UART"
 186                 depends on SOC_IMX1
 187                 help
 188                   Say Y here if you want kernel low-level debugging support
 189                   on i.MX1.
 190
 191         config DEBUG_IMX23_UART
 192                 bool "i.MX23 Debug UART"
 193                 depends on SOC_IMX23
 194                 help
 195                   Say Y here if you want kernel low-level debugging support
 196                   on i.MX23.
 197
 198         config DEBUG_IMX25_UART
 199                 bool "i.MX25 Debug UART"
 200                 depends on SOC_IMX25
 201                 help
 202                   Say Y here if you want kernel low-level debugging support
 203                   on i.MX25.
 204
 205         config DEBUG_IMX21_IMX27_UART
 206                 bool "i.MX21 and i.MX27 Debug UART"
 207                 depends on SOC_IMX21 || SOC_IMX27
 208                 help
 209                   Say Y here if you want kernel low-level debugging support
 210                   on i.MX21 or i.MX27.
 211
 212         config DEBUG_IMX28_UART
 213                 bool "i.MX28 Debug UART"
 214                 depends on SOC_IMX28
 215                 help
 216                   Say Y here if you want kernel low-level debugging support
 217                   on i.MX28.
 218
 219         config DEBUG_IMX31_UART
 220                 bool "i.MX31 Debug UART"
 221                 depends on SOC_IMX31
 222                 help
 223                   Say Y here if you want kernel low-level debugging support
 224                   on i.MX31.
 225
 226         config DEBUG_IMX35_UART
 227                 bool "i.MX35 Debug UART"
 228                 depends on SOC_IMX35
 229                 help
 230                   Say Y here if you want kernel low-level debugging support
 231                   on i.MX35.
 232
 233         config DEBUG_IMX51_UART
 234                 bool "i.MX51 Debug UART"
 235                 depends on SOC_IMX51
 236                 help
 237                   Say Y here if you want kernel low-level debugging support
 238                   on i.MX51.
 239
 240         config DEBUG_IMX53_UART
 241                 bool "i.MX53 Debug UART"
 242                 depends on SOC_IMX53
 243                 help
 244                   Say Y here if you want kernel low-level debugging support
 245                   on i.MX53.
 246
 247         config DEBUG_IMX6Q_UART
 248                 bool "i.MX6Q/DL Debug UART"
 249                 depends on SOC_IMX6Q
 250                 help
 251                   Say Y here if you want kernel low-level debugging support
 252                   on i.MX6Q/DL.
 253
 254         config DEBUG_MMP_UART2
 255                 bool "Kernel low-level debugging message via MMP UART2"
 256                 depends on ARCH_MMP
 257                 help
 258                   Say Y here if you want kernel low-level debugging support
 259                   on MMP UART2.
 260
 261         config DEBUG_MMP_UART3
 262                 bool "Kernel low-level debugging message via MMP UART3"
 263                 depends on ARCH_MMP
 264                 help
 265                   Say Y here if you want kernel low-level debugging support
 266                   on MMP UART3.
 267
 268         config DEBUG_MSM_UART1
 269                 bool "Kernel low-level debugging messages via MSM UART1"
 270                 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
 271                 help
 272                   Say Y here if you want the debug print routines to direct
 273                   their output to the first serial port on MSM devices.
 274
 275         config DEBUG_MSM_UART2
 276                 bool "Kernel low-level debugging messages via MSM UART2"
 277                 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
 278                 help
 279                   Say Y here if you want the debug print routines to direct
 280                   their output to the second serial port on MSM devices.
 281
 282         config DEBUG_MSM_UART3
 283                 bool "Kernel low-level debugging messages via MSM UART3"
 284                 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
 285                 help
 286                   Say Y here if you want the debug print routines to direct
 287                   their output to the third serial port on MSM devices.
 288
 289         config DEBUG_MSM8660_UART
 290                 bool "Kernel low-level debugging messages via MSM 8660 UART"
 291                 depends on ARCH_MSM8X60
 292                 select MSM_HAS_DEBUG_UART_HS
 293                 help
 294                   Say Y here if you want the debug print routines to direct
 295                   their output to the serial port on MSM 8660 devices.
 296
 297         config DEBUG_MSM8960_UART
 298                 bool "Kernel low-level debugging messages via MSM 8960 UART"
 299                 depends on ARCH_MSM8960
 300                 select MSM_HAS_DEBUG_UART_HS
 301                 help
 302                   Say Y here if you want the debug print routines to direct
 303                   their output to the serial port on MSM 8960 devices.
 304
 305         config DEBUG_MVEBU_UART
 306                 bool "Kernel low-level debugging messages via MVEBU UART"
 307                 depends on ARCH_MVEBU
 308                 help
 309                   Say Y here if you want kernel low-level debugging support
 310                   on MVEBU based platforms.
 311
 312         config DEBUG_NOMADIK_UART
 313                 bool "Kernel low-level debugging messages via NOMADIK UART"
 314                 depends on ARCH_NOMADIK
 315                 help
 316                   Say Y here if you want kernel low-level debugging support
 317                   on NOMADIK based platforms.
 318
 319         config DEBUG_OMAP2PLUS_UART
 320                 bool "Kernel low-level debugging messages via OMAP2PLUS UART"
 321                 depends on ARCH_OMAP2PLUS
 322                 help
 323                   Say Y here if you want kernel low-level debugging support
 324                   on OMAP2PLUS based platforms.
 325
 326         config DEBUG_PICOXCELL_UART
 327                 depends on ARCH_PICOXCELL
 328                 bool "Use PicoXcell UART for low-level debug"
 329                 help
 330                   Say Y here if you want kernel low-level debugging support
 331                   on PicoXcell based platforms.
 332
 333         config DEBUG_PXA_UART1
 334                 depends on ARCH_PXA
 335                 bool "Use PXA UART1 for low-level debug"
 336                 help
 337                   Say Y here if you want kernel low-level debugging support
 338                   on PXA UART1.
 339
 340         config DEBUG_REALVIEW_STD_PORT
 341                 bool "RealView Default UART"
 342                 depends on ARCH_REALVIEW
 343                 help
 344                   Say Y here if you want the debug print routines to direct
 345                   their output to the serial port on RealView EB, PB11MP, PBA8
 346                   and PBX platforms.
 347
 348         config DEBUG_REALVIEW_PB1176_PORT
 349                 bool "RealView PB1176 UART"
 350                 depends on MACH_REALVIEW_PB1176
 351                 help
 352                   Say Y here if you want the debug print routines to direct
 353                   their output to the standard serial port on the RealView
 354                   PB1176 platform.
 355
 356         config DEBUG_S3C_UART0
 357                 depends on PLAT_SAMSUNG
 358                 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
 359                 bool "Use S3C UART 0 for low-level debug"
 360                 help
 361                   Say Y here if you want the debug print routines to direct
 362                   their output to UART 0. The port must have been initialised
 363                   by the boot-loader before use.
 364
 365                   The uncompressor code port configuration is now handled
 366                   by CONFIG_S3C_LOWLEVEL_UART_PORT.
 367
 368         config DEBUG_S3C_UART1
 369                 depends on PLAT_SAMSUNG
 370                 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
 371                 bool "Use S3C UART 1 for low-level debug"
 372                 help
 373                   Say Y here if you want the debug print routines to direct
 374                   their output to UART 1. The port must have been initialised
 375                   by the boot-loader before use.
 376
 377                   The uncompressor code port configuration is now handled
 378                   by CONFIG_S3C_LOWLEVEL_UART_PORT.
 379
 380         config DEBUG_S3C_UART2
 381                 depends on PLAT_SAMSUNG
 382                 select DEBUG_EXYNOS_UART if ARCH_EXYNOS
 383                 bool "Use S3C UART 2 for low-level debug"
 384                 help
 385                   Say Y here if you want the debug print routines to direct
 386                   their output to UART 2. The port must have been initialised
 387                   by the boot-loader before use.
 388
 389                   The uncompressor code port configuration is now handled
 390                   by CONFIG_S3C_LOWLEVEL_UART_PORT.
 391
 392         config DEBUG_S3C_UART3
 393                 depends on PLAT_SAMSUNG && ARCH_EXYNOS
 394                 select DEBUG_EXYNOS_UART
 395                 bool "Use S3C UART 3 for low-level debug"
 396                 help
 397                   Say Y here if you want the debug print routines to direct
 398                   their output to UART 3. The port must have been initialised
 399                   by the boot-loader before use.
 400
 401                   The uncompressor code port configuration is now handled
 402                   by CONFIG_S3C_LOWLEVEL_UART_PORT.
 403
 404         config DEBUG_SOCFPGA_UART
 405                 depends on ARCH_SOCFPGA
 406                 bool "Use SOCFPGA UART for low-level debug"
 407                 help
 408                   Say Y here if you want kernel low-level debugging support
 409                   on SOCFPGA based platforms.
 410
 411         config DEBUG_SUNXI_UART0
 412                 bool "Kernel low-level debugging messages via sunXi UART0"
 413                 depends on ARCH_SUNXI
 414                 help
 415                   Say Y here if you want kernel low-level debugging support
 416                   on Allwinner A1X based platforms on the UART0.
 417
 418         config DEBUG_SUNXI_UART1
 419                 bool "Kernel low-level debugging messages via sunXi UART1"
 420                 depends on ARCH_SUNXI
 421                 help
 422                   Say Y here if you want kernel low-level debugging support
 423                   on Allwinner A1X based platforms on the UART1.
 424
 425         config DEBUG_TEGRA_UART
 426                 depends on ARCH_TEGRA
 427                 bool "Use Tegra UART for low-level debug"
 428                 help
 429                   Say Y here if you want kernel low-level debugging support
 430                   on Tegra based platforms.
 431
 432         config DEBUG_SIRFPRIMA2_UART1
 433                 bool "Kernel low-level debugging messages via SiRFprimaII UART1"
 434                 depends on ARCH_PRIMA2
 435                 help
 436                   Say Y here if you want the debug print routines to direct
 437                   their output to the uart1 port on SiRFprimaII devices.
 438
 439         config DEBUG_SIRFMARCO_UART1
 440                 bool "Kernel low-level debugging messages via SiRFmarco UART1"
 441                 depends on ARCH_MARCO
 442                 help
 443                   Say Y here if you want the debug print routines to direct
 444                   their output to the uart1 port on SiRFmarco devices.
 445
 446         config DEBUG_UX500_UART
 447                 depends on ARCH_U8500
 448                 bool "Use Ux500 UART for low-level debug"
 449                 help
 450                   Say Y here if you want kernel low-level debugging support
 451                   on Ux500 based platforms.
 452
 453         config DEBUG_VEXPRESS_UART0_DETECT
 454                 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
 455                 depends on ARCH_VEXPRESS && CPU_CP15_MMU
 456                 help
 457                   This option enables a simple heuristic which tries to determine
 458                   the motherboard's memory map variant (original or RS1) and then
 459                   choose the relevant UART0 base address.
 460
 461                   Note that this will only work with standard A-class core tiles,
 462                   and may fail with non-standard SMM or custom software models.
 463
 464         config DEBUG_VEXPRESS_UART0_CA9
 465                 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
 466                 depends on ARCH_VEXPRESS
 467                 help
 468                   This option selects UART0 at 0x10009000. Except for custom models,
 469                   this applies only to the V2P-CA9 tile.
 470
 471         config DEBUG_VEXPRESS_UART0_RS1
 472                 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
 473                 depends on ARCH_VEXPRESS
 474                 help
 475                   This option selects UART0 at 0x1c090000. This applies to most
 476                   of the tiles using the RS1 memory map, including all new A-class
 477                   core tiles, FPGA-based SMMs and software models.
 478
 479         config DEBUG_VT8500_UART0
 480                 bool "Use UART0 on VIA/Wondermedia SoCs"
 481                 depends on ARCH_VT8500
 482                 help
 483                   This option selects UART0 on VIA/Wondermedia System-on-a-chip
 484                   devices, including VT8500, WM8505, WM8650 and WM8850.
 485
 486         config DEBUG_LL_UART_NONE
 487                 bool "No low-level debugging UART"
 488                 depends on !ARCH_MULTIPLATFORM
 489                 help
 490                   Say Y here if your platform doesn't provide a UART option
 491                   below. This relies on your platform choosing the right UART
 492                   definition internally in order for low-level debugging to
 493                   work.
 494
 495         config DEBUG_ICEDCC
 496                 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
 497                 help
 498                   Say Y here if you want the debug print routines to direct
 499                   their output to the EmbeddedICE macrocell's DCC channel using
 500                   co-processor 14. This is known to work on the ARM9 style ICE
 501                   channel and on the XScale with the PEEDI.
 502
 503                   Note that the system will appear to hang during boot if there
 504                   is nothing connected to read from the DCC.
 505
 506         config DEBUG_SEMIHOSTING
 507                 bool "Kernel low-level debug output via semihosting I/O"
 508                 help
 509                   Semihosting enables code running on an ARM target to use
 510                   the I/O facilities on a host debugger/emulator through a
 511                   simple SVC call. The host debugger or emulator must have
 512                   semihosting enabled for the special svc call to be trapped
 513                   otherwise the kernel will crash.
 514
 515                   This is known to work with OpenOCD, as well as
 516                   ARM's Fast Models, or any other controlling environment
 517                   that implements semihosting.
 518
 519                   For more details about semihosting, please see
 520                   chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
 521
 522 endchoice
 523
 524 config DEBUG_EXYNOS_UART
 525         bool
 526
 527 config DEBUG_IMX_UART_PORT
 528         int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
 529                                                 DEBUG_IMX25_UART || \
 530                                                 DEBUG_IMX21_IMX27_UART || \
 531                                                 DEBUG_IMX31_UART || \
 532                                                 DEBUG_IMX35_UART || \
 533                                                 DEBUG_IMX51_UART || \
 534                                                 DEBUG_IMX53_UART || \
 535                                                 DEBUG_IMX6Q_UART
 536         default 1
 537         depends on ARCH_MXC
 538         help
 539           Choose UART port on which kernel low-level debug messages
 540           should be output.
 541
 542 choice
 543         prompt "Low-level debug console UART"
 544         depends on DEBUG_OMAP2PLUS_UART
 545
 546         config DEBUG_OMAP2UART1
 547                 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
 548                 help
 549                   This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
 550                   omap3 torpedo and 3530 lv som.
 551
 552         config DEBUG_OMAP2UART2
 553                 bool "OMAP2/3/4 UART2"
 554
 555         config DEBUG_OMAP2UART3
 556                 bool "OMAP2 UART3 (n8x0)"
 557
 558         config DEBUG_OMAP3UART3
 559                 bool "OMAP3 UART3 (most omap3 boards)"
 560                 help
 561                   This covers at least cm_t3x, beagle, crane, devkit8000,
 562                   igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
 563                   and 3517evm.
 564
 565         config DEBUG_OMAP4UART3
 566                 bool "OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
 567
 568         config DEBUG_OMAP3UART4
 569                 bool "OMAP36XX UART4"
 570
 571         config DEBUG_OMAP4UART4
 572                 bool "OMAP4/5 UART4"
 573
 574         config DEBUG_TI81XXUART1
 575                 bool "TI81XX UART1 (ti8148evm)"
 576
 577         config DEBUG_TI81XXUART2
 578                 bool "TI81XX UART2"
 579
 580         config DEBUG_TI81XXUART3
 581                 bool "TI81XX UART3 (ti8168evm)"
 582
 583         config DEBUG_AM33XXUART1
 584                 bool "AM33XX UART1"
 585
 586         config DEBUG_ZOOM_UART
 587                 bool "Zoom2/3 UART"
 588 endchoice
 589
 590 choice
 591         prompt "Low-level debug console UART"
 592         depends on DEBUG_LL && DEBUG_TEGRA_UART
 593
 594         config TEGRA_DEBUG_UART_AUTO_ODMDATA
 595         bool "Via ODMDATA"
 596         help
 597           Automatically determines which UART to use for low-level debug based
 598           on the ODMDATA value. This value is part of the BCT, and is written
 599           to the boot memory device using nvflash, or other flashing tool.
 600           When bits 19:18 are 3, then bits 17:15 indicate which UART to use;
 601           0/1/2/3/4 are UART A/B/C/D/E.
 602
 603         config TEGRA_DEBUG_UARTA
 604                 bool "UART A"
 605
 606         config TEGRA_DEBUG_UARTB
 607                 bool "UART B"
 608
 609         config TEGRA_DEBUG_UARTC
 610                 bool "UART C"
 611
 612         config TEGRA_DEBUG_UARTD
 613                 bool "UART D"
 614
 615         config TEGRA_DEBUG_UARTE
 616                 bool "UART E"
 617
 618 endchoice
 619
 620 config DEBUG_LL_INCLUDE
 621         string
 622         default "debug/bcm2835.S" if DEBUG_BCM2835
 623         default "debug/cns3xxx.S" if DEBUG_CNS3XXX
 624         default "debug/exynos.S" if DEBUG_EXYNOS_UART
 625         default "debug/highbank.S" if DEBUG_HIGHBANK_UART
 626         default "debug/icedcc.S" if DEBUG_ICEDCC
 627         default "debug/imx.S" if DEBUG_IMX1_UART || \
 628                                  DEBUG_IMX25_UART || \
 629                                  DEBUG_IMX21_IMX27_UART || \
 630                                  DEBUG_IMX31_UART || \
 631                                  DEBUG_IMX35_UART || \
 632                                  DEBUG_IMX51_UART || \
 633                                  DEBUG_IMX53_UART ||\
 634                                  DEBUG_IMX6Q_UART
 635         default "debug/mvebu.S" if DEBUG_MVEBU_UART
 636         default "debug/mxs.S" if DEBUG_IMX23_UART || DEBUG_IMX28_UART
 637         default "debug/nomadik.S" if DEBUG_NOMADIK_UART
 638         default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
 639         default "debug/picoxcell.S" if DEBUG_PICOXCELL_UART
 640         default "debug/pxa.S" if DEBUG_PXA_UART1 || DEBUG_MMP_UART2 || \
 641                                  DEBUG_MMP_UART3
 642         default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
 643         default "debug/socfpga.S" if DEBUG_SOCFPGA_UART
 644         default "debug/sunxi.S" if DEBUG_SUNXI_UART0 || DEBUG_SUNXI_UART1
 645         default "debug/tegra.S" if DEBUG_TEGRA_UART
 646         default "debug/ux500.S" if DEBUG_UX500_UART
 647         default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT || \
 648                 DEBUG_VEXPRESS_UART0_CA9 || DEBUG_VEXPRESS_UART0_RS1
 649         default "debug/vt8500.S" if DEBUG_VT8500_UART0
 650         default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
 651         default "mach/debug-macro.S"
 652
 653 config DEBUG_UNCOMPRESS
 654         bool
 655         default y if ARCH_MULTIPLATFORM && DEBUG_LL && \
 656                      !DEBUG_OMAP2PLUS_UART && \
 657                      !DEBUG_TEGRA_UART
 658
 659 config UNCOMPRESS_INCLUDE
 660         string
 661         default "debug/uncompress.h" if ARCH_MULTIPLATFORM
 662         default "mach/uncompress.h"
 663
 664 config EARLY_PRINTK
 665         bool "Early printk"
 666         depends on DEBUG_LL
 667         help
 668           Say Y here if you want to have an early console using the
 669           kernel low-level debugging functions. Add earlyprintk to your
 670           kernel parameters to enable this console.
 671
 672 config OC_ETM
 673         bool "On-chip ETM and ETB"
 674         depends on ARM_AMBA
 675         help
 676           Enables the on-chip embedded trace macrocell and embedded trace
 677           buffer driver that will allow you to collect traces of the
 678           kernel code.
 679
 680 config ARM_KPROBES_TEST
 681         tristate "Kprobes test module"
 682         depends on KPROBES && MODULES
 683         help
 684           Perform tests of kprobes API and instruction set simulation.
 685
 686 config PID_IN_CONTEXTIDR
 687         bool "Write the current PID to the CONTEXTIDR register"
 688         depends on CPU_COPY_V6
 689         help
 690           Enabling this option causes the kernel to write the current PID to
 691           the PROCID field of the CONTEXTIDR register, at the expense of some
 692           additional instructions during context switch. Say Y here only if you
 693           are planning to use hardware trace tools with this kernel.
 694
 695 endmenu