linux/arch/arm/Kconfig.debug
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   1menu "Kernel hacking"
   2
   3source "lib/Kconfig.debug"
   4
   5config 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 ;).
  23config 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
  33config 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
  44config OLD_MCOUNT
  45        bool
  46        depends on FUNCTION_TRACER && FRAME_POINTER
  47        default y
  48
  49config 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.
  67config 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
  80choice
  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_IMX6SL_UART
 255                bool "i.MX6SL Debug UART"
 256                depends on SOC_IMX6SL
 257                help
 258                  Say Y here if you want kernel low-level debugging support
 259                  on i.MX6SL.
 260
 261        config DEBUG_KEYSTONE_UART0
 262                bool "Kernel low-level debugging on KEYSTONE2 using UART0"
 263                depends on ARCH_KEYSTONE
 264                help
 265                  Say Y here if you want the debug print routines to direct
 266                  their output to UART0 serial port on KEYSTONE2 devices.
 267
 268        config DEBUG_KEYSTONE_UART1
 269                bool "Kernel low-level debugging on KEYSTONE2 using UART1"
 270                depends on ARCH_KEYSTONE
 271                help
 272                  Say Y here if you want the debug print routines to direct
 273                  their output to UART1 serial port on KEYSTONE2 devices.
 274
 275        config DEBUG_MMP_UART2
 276                bool "Kernel low-level debugging message via MMP UART2"
 277                depends on ARCH_MMP
 278                help
 279                  Say Y here if you want kernel low-level debugging support
 280                  on MMP UART2.
 281
 282        config DEBUG_MMP_UART3
 283                bool "Kernel low-level debugging message via MMP UART3"
 284                depends on ARCH_MMP
 285                help
 286                  Say Y here if you want kernel low-level debugging support
 287                  on MMP UART3.
 288
 289        config DEBUG_MSM_UART1
 290                bool "Kernel low-level debugging messages via MSM UART1"
 291                depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
 292                help
 293                  Say Y here if you want the debug print routines to direct
 294                  their output to the first serial port on MSM devices.
 295
 296        config DEBUG_MSM_UART2
 297                bool "Kernel low-level debugging messages via MSM UART2"
 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 second serial port on MSM devices.
 302
 303        config DEBUG_MSM_UART3
 304                bool "Kernel low-level debugging messages via MSM UART3"
 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 third serial port on MSM devices.
 309
 310        config DEBUG_MSM8660_UART
 311                bool "Kernel low-level debugging messages via MSM 8660 UART"
 312                depends on ARCH_MSM8X60
 313                select MSM_HAS_DEBUG_UART_HS
 314                help
 315                  Say Y here if you want the debug print routines to direct
 316                  their output to the serial port on MSM 8660 devices.
 317
 318        config DEBUG_MSM8960_UART
 319                bool "Kernel low-level debugging messages via MSM 8960 UART"
 320                depends on ARCH_MSM8960
 321                select MSM_HAS_DEBUG_UART_HS
 322                help
 323                  Say Y here if you want the debug print routines to direct
 324                  their output to the serial port on MSM 8960 devices.
 325
 326        config DEBUG_MVEBU_UART
 327                bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
 328                depends on ARCH_MVEBU
 329                help
 330                  Say Y here if you want kernel low-level debugging support
 331                  on MVEBU based platforms.
 332
 333                  This option should be used with the old bootloaders
 334                  that left the internal registers mapped at
 335                  0xd0000000. As of today, this is the case on
 336                  platforms such as the Globalscale Mirabox or the
 337                  Plathome OpenBlocks AX3, when using the original
 338                  bootloader.
 339
 340                  If the wrong DEBUG_MVEBU_UART* option is selected,
 341                  when u-boot hands over to the kernel, the system
 342                  silently crashes, with no serial output at all.
 343
 344        config DEBUG_MVEBU_UART_ALTERNATE
 345                bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)"
 346                depends on ARCH_MVEBU
 347                help
 348                  Say Y here if you want kernel low-level debugging support
 349                  on MVEBU based platforms.
 350
 351                  This option should be used with the new bootloaders
 352                  that remap the internal registers at 0xf1000000.
 353
 354                  If the wrong DEBUG_MVEBU_UART* option is selected,
 355                  when u-boot hands over to the kernel, the system
 356                  silently crashes, with no serial output at all.
 357
 358        config DEBUG_NOMADIK_UART
 359                bool "Kernel low-level debugging messages via NOMADIK UART"
 360                depends on ARCH_NOMADIK
 361                help
 362                  Say Y here if you want kernel low-level debugging support
 363                  on NOMADIK based platforms.
 364
 365        config DEBUG_NSPIRE_CLASSIC_UART
 366                bool "Kernel low-level debugging via TI-NSPIRE 8250 UART"
 367                depends on ARCH_NSPIRE
 368                help
 369                  Say Y here if you want kernel low-level debugging support
 370                  on TI-NSPIRE classic models.
 371
 372        config DEBUG_NSPIRE_CX_UART
 373                bool "Kernel low-level debugging via TI-NSPIRE PL011 UART"
 374                depends on ARCH_NSPIRE
 375                help
 376                  Say Y here if you want kernel low-level debugging support
 377                  on TI-NSPIRE CX models.
 378
 379        config DEBUG_OMAP2PLUS_UART
 380                bool "Kernel low-level debugging messages via OMAP2PLUS UART"
 381                depends on ARCH_OMAP2PLUS
 382                help
 383                  Say Y here if you want kernel low-level debugging support
 384                  on OMAP2PLUS based platforms.
 385
 386        config DEBUG_PICOXCELL_UART
 387                depends on ARCH_PICOXCELL
 388                bool "Use PicoXcell UART for low-level debug"
 389                help
 390                  Say Y here if you want kernel low-level debugging support
 391                  on PicoXcell based platforms.
 392
 393        config DEBUG_PXA_UART1
 394                depends on ARCH_PXA
 395                bool "Use PXA UART1 for low-level debug"
 396                help
 397                  Say Y here if you want kernel low-level debugging support
 398                  on PXA UART1.
 399
 400        config DEBUG_REALVIEW_STD_PORT
 401                bool "RealView Default UART"
 402                depends on ARCH_REALVIEW
 403                help
 404                  Say Y here if you want the debug print routines to direct
 405                  their output to the serial port on RealView EB, PB11MP, PBA8
 406                  and PBX platforms.
 407
 408        config DEBUG_REALVIEW_PB1176_PORT
 409                bool "RealView PB1176 UART"
 410                depends on MACH_REALVIEW_PB1176
 411                help
 412                  Say Y here if you want the debug print routines to direct
 413                  their output to the standard serial port on the RealView
 414                  PB1176 platform.
 415
 416        config DEBUG_ROCKCHIP_UART
 417                bool "Kernel low-level debugging messages via Rockchip UART"
 418                depends on ARCH_ROCKCHIP
 419                help
 420                  Say Y here if you want kernel low-level debugging support
 421                  on Rockchip based platforms.
 422
 423        config DEBUG_S3C_UART0
 424                depends on PLAT_SAMSUNG
 425                select DEBUG_EXYNOS_UART if ARCH_EXYNOS
 426                bool "Use S3C UART 0 for low-level debug"
 427                help
 428                  Say Y here if you want the debug print routines to direct
 429                  their output to UART 0. The port must have been initialised
 430                  by the boot-loader before use.
 431
 432                  The uncompressor code port configuration is now handled
 433                  by CONFIG_S3C_LOWLEVEL_UART_PORT.
 434
 435        config DEBUG_S3C_UART1
 436                depends on PLAT_SAMSUNG
 437                select DEBUG_EXYNOS_UART if ARCH_EXYNOS
 438                bool "Use S3C UART 1 for low-level debug"
 439                help
 440                  Say Y here if you want the debug print routines to direct
 441                  their output to UART 1. The port must have been initialised
 442                  by the boot-loader before use.
 443
 444                  The uncompressor code port configuration is now handled
 445                  by CONFIG_S3C_LOWLEVEL_UART_PORT.
 446
 447        config DEBUG_S3C_UART2
 448                depends on PLAT_SAMSUNG
 449                select DEBUG_EXYNOS_UART if ARCH_EXYNOS
 450                bool "Use S3C UART 2 for low-level debug"
 451                help
 452                  Say Y here if you want the debug print routines to direct
 453                  their output to UART 2. The port must have been initialised
 454                  by the boot-loader before use.
 455
 456                  The uncompressor code port configuration is now handled
 457                  by CONFIG_S3C_LOWLEVEL_UART_PORT.
 458
 459        config DEBUG_S3C_UART3
 460                depends on PLAT_SAMSUNG && ARCH_EXYNOS
 461                select DEBUG_EXYNOS_UART
 462                bool "Use S3C UART 3 for low-level debug"
 463                help
 464                  Say Y here if you want the debug print routines to direct
 465                  their output to UART 3. The port must have been initialised
 466                  by the boot-loader before use.
 467
 468                  The uncompressor code port configuration is now handled
 469                  by CONFIG_S3C_LOWLEVEL_UART_PORT.
 470
 471        config DEBUG_SOCFPGA_UART
 472                depends on ARCH_SOCFPGA
 473                bool "Use SOCFPGA UART for low-level debug"
 474                help
 475                  Say Y here if you want kernel low-level debugging support
 476                  on SOCFPGA based platforms.
 477
 478        config DEBUG_SUNXI_UART0
 479                bool "Kernel low-level debugging messages via sunXi UART0"
 480                depends on ARCH_SUNXI
 481                help
 482                  Say Y here if you want kernel low-level debugging support
 483                  on Allwinner A1X based platforms on the UART0.
 484
 485        config DEBUG_SUNXI_UART1
 486                bool "Kernel low-level debugging messages via sunXi UART1"
 487                depends on ARCH_SUNXI
 488                help
 489                  Say Y here if you want kernel low-level debugging support
 490                  on Allwinner A1X based platforms on the UART1.
 491
 492        config DEBUG_TEGRA_UART
 493                depends on ARCH_TEGRA
 494                bool "Use Tegra UART for low-level debug"
 495                help
 496                  Say Y here if you want kernel low-level debugging support
 497                  on Tegra based platforms.
 498
 499        config DEBUG_SIRFPRIMA2_UART1
 500                bool "Kernel low-level debugging messages via SiRFprimaII UART1"
 501                depends on ARCH_PRIMA2
 502                help
 503                  Say Y here if you want the debug print routines to direct
 504                  their output to the uart1 port on SiRFprimaII devices.
 505
 506        config DEBUG_SIRFMARCO_UART1
 507                bool "Kernel low-level debugging messages via SiRFmarco UART1"
 508                depends on ARCH_MARCO
 509                help
 510                  Say Y here if you want the debug print routines to direct
 511                  their output to the uart1 port on SiRFmarco devices.
 512
 513        config DEBUG_STI_UART
 514                depends on ARCH_STI
 515                bool "Use StiH415/416 ASC for low-level debug"
 516                help
 517                  Say Y here if you want kernel low-level debugging support
 518                  on StiH415/416 based platforms like B2000, B2020.
 519                  It support UART2 and SBC_UART1.
 520
 521                  If unsure, say N.
 522
 523        config DEBUG_U300_UART
 524                bool "Kernel low-level debugging messages via U300 UART0"
 525                depends on ARCH_U300
 526                help
 527                  Say Y here if you want the debug print routines to direct
 528                  their output to the uart port on U300 devices.
 529
 530        config DEBUG_UX500_UART
 531                depends on ARCH_U8500
 532                bool "Use Ux500 UART for low-level debug"
 533                help
 534                  Say Y here if you want kernel low-level debugging support
 535                  on Ux500 based platforms.
 536
 537        config DEBUG_VEXPRESS_UART0_DETECT
 538                bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
 539                depends on ARCH_VEXPRESS && CPU_CP15_MMU
 540                help
 541                  This option enables a simple heuristic which tries to determine
 542                  the motherboard's memory map variant (original or RS1) and then
 543                  choose the relevant UART0 base address.
 544
 545                  Note that this will only work with standard A-class core tiles,
 546                  and may fail with non-standard SMM or custom software models.
 547
 548        config DEBUG_VEXPRESS_UART0_CA9
 549                bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
 550                depends on ARCH_VEXPRESS
 551                help
 552                  This option selects UART0 at 0x10009000. Except for custom models,
 553                  this applies only to the V2P-CA9 tile.
 554
 555        config DEBUG_VEXPRESS_UART0_RS1
 556                bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
 557                depends on ARCH_VEXPRESS
 558                help
 559                  This option selects UART0 at 0x1c090000. This applies to most
 560                  of the tiles using the RS1 memory map, including all new A-class
 561                  core tiles, FPGA-based SMMs and software models.
 562
 563        config DEBUG_VEXPRESS_UART0_CRX
 564                bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)"
 565                depends on ARCH_VEXPRESS && !MMU
 566                help
 567                  This option selects UART0 at 0xb0090000. This is appropriate for
 568                  Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7
 569
 570        config DEBUG_VT8500_UART0
 571                bool "Use UART0 on VIA/Wondermedia SoCs"
 572                depends on ARCH_VT8500
 573                help
 574                  This option selects UART0 on VIA/Wondermedia System-on-a-chip
 575                  devices, including VT8500, WM8505, WM8650 and WM8850.
 576
 577        config DEBUG_LL_UART_NONE
 578                bool "No low-level debugging UART"
 579                depends on !ARCH_MULTIPLATFORM
 580                help
 581                  Say Y here if your platform doesn't provide a UART option
 582                  below. This relies on your platform choosing the right UART
 583                  definition internally in order for low-level debugging to
 584                  work.
 585
 586        config DEBUG_ICEDCC
 587                bool "Kernel low-level debugging via EmbeddedICE DCC channel"
 588                help
 589                  Say Y here if you want the debug print routines to direct
 590                  their output to the EmbeddedICE macrocell's DCC channel using
 591                  co-processor 14. This is known to work on the ARM9 style ICE
 592                  channel and on the XScale with the PEEDI.
 593
 594                  Note that the system will appear to hang during boot if there
 595                  is nothing connected to read from the DCC.
 596
 597        config DEBUG_SEMIHOSTING
 598                bool "Kernel low-level debug output via semihosting I/O"
 599                help
 600                  Semihosting enables code running on an ARM target to use
 601                  the I/O facilities on a host debugger/emulator through a
 602                  simple SVC call. The host debugger or emulator must have
 603                  semihosting enabled for the special svc call to be trapped
 604                  otherwise the kernel will crash.
 605
 606                  This is known to work with OpenOCD, as well as
 607                  ARM's Fast Models, or any other controlling environment
 608                  that implements semihosting.
 609
 610                  For more details about semihosting, please see
 611                  chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
 612
 613endchoice
 614
 615config DEBUG_EXYNOS_UART
 616        bool
 617
 618config DEBUG_IMX_UART_PORT
 619        int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \
 620                                                DEBUG_IMX25_UART || \
 621                                                DEBUG_IMX21_IMX27_UART || \
 622                                                DEBUG_IMX31_UART || \
 623                                                DEBUG_IMX35_UART || \
 624                                                DEBUG_IMX51_UART || \
 625                                                DEBUG_IMX53_UART || \
 626                                                DEBUG_IMX6Q_UART || \
 627                                                DEBUG_IMX6SL_UART
 628        default 1
 629        depends on ARCH_MXC
 630        help
 631          Choose UART port on which kernel low-level debug messages
 632          should be output.
 633
 634choice
 635        prompt "Low-level debug console UART"
 636        depends on DEBUG_OMAP2PLUS_UART
 637
 638        config DEBUG_OMAP2UART1
 639                bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)"
 640                help
 641                  This covers at least h4, 2430sdp, 3430sdp, 3630sdp,
 642                  omap3 torpedo and 3530 lv som.
 643
 644        config DEBUG_OMAP2UART2
 645                bool "OMAP2/3/4 UART2"
 646
 647        config DEBUG_OMAP2UART3
 648                bool "OMAP2 UART3 (n8x0)"
 649
 650        config DEBUG_OMAP3UART3
 651                bool "OMAP3 UART3 (most omap3 boards)"
 652                help
 653                  This covers at least cm_t3x, beagle, crane, devkit8000,
 654                  igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
 655                  and 3517evm.
 656
 657        config DEBUG_OMAP4UART3
 658                bool "OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
 659
 660        config DEBUG_OMAP3UART4
 661                bool "OMAP36XX UART4"
 662
 663        config DEBUG_OMAP4UART4
 664                bool "OMAP4/5 UART4"
 665
 666        config DEBUG_TI81XXUART1
 667                bool "TI81XX UART1 (ti8148evm)"
 668
 669        config DEBUG_TI81XXUART2
 670                bool "TI81XX UART2"
 671
 672        config DEBUG_TI81XXUART3
 673                bool "TI81XX UART3 (ti8168evm)"
 674
 675        config DEBUG_AM33XXUART1
 676                bool "AM33XX UART1"
 677
 678        config DEBUG_ZOOM_UART
 679                bool "Zoom2/3 UART"
 680endchoice
 681
 682choice
 683        prompt "Low-level debug console UART"
 684        depends on DEBUG_ROCKCHIP_UART
 685
 686        config DEBUG_RK29_UART0
 687                bool "RK29 UART0"
 688
 689        config DEBUG_RK29_UART1
 690                bool "RK29 UART1"
 691
 692        config DEBUG_RK29_UART2
 693                bool "RK29 UART2"
 694
 695        config DEBUG_RK3X_UART0
 696                bool "RK3X UART0"
 697
 698        config DEBUG_RK3X_UART1
 699                bool "RK3X UART1"
 700
 701        config DEBUG_RK3X_UART2
 702                bool "RK3X UART2"
 703
 704        config DEBUG_RK3X_UART3
 705                bool "RK3X UART3"
 706endchoice
 707
 708choice
 709        prompt "Low-level debug console UART"
 710        depends on DEBUG_LL && DEBUG_TEGRA_UART
 711
 712        config TEGRA_DEBUG_UART_AUTO_ODMDATA
 713        bool "Via ODMDATA"
 714        help
 715          Automatically determines which UART to use for low-level debug based
 716          on the ODMDATA value. This value is part of the BCT, and is written
 717          to the boot memory device using nvflash, or other flashing tool.
 718          When bits 19:18 are 3, then bits 17:15 indicate which UART to use;
 719          0/1/2/3/4 are UART A/B/C/D/E.
 720
 721        config TEGRA_DEBUG_UARTA
 722                bool "UART A"
 723
 724        config TEGRA_DEBUG_UARTB
 725                bool "UART B"
 726
 727        config TEGRA_DEBUG_UARTC
 728                bool "UART C"
 729
 730        config TEGRA_DEBUG_UARTD
 731                bool "UART D"
 732
 733        config TEGRA_DEBUG_UARTE
 734                bool "UART E"
 735
 736endchoice
 737
 738choice
 739        prompt "Low-level debug console UART"
 740        depends on DEBUG_LL && DEBUG_STI_UART
 741
 742        config STIH41X_DEBUG_ASC2
 743                bool "ASC2 UART"
 744                help
 745                  Say Y here if you want kernel low-level debugging support
 746                  on STiH415/416 based platforms like b2000, which has
 747                  default UART wired up to ASC2.
 748
 749                  If unsure, say N.
 750
 751        config STIH41X_DEBUG_SBC_ASC1
 752                bool "SBC ASC1 UART"
 753                help
 754                  Say Y here if you want kernel low-level debugging support
 755                  on STiH415/416 based platforms like b2020. which has
 756                  default UART wired up to SBC ASC1.
 757
 758                  If unsure, say N.
 759
 760endchoice
 761
 762config DEBUG_LL_INCLUDE
 763        string
 764        default "debug/bcm2835.S" if DEBUG_BCM2835
 765        default "debug/cns3xxx.S" if DEBUG_CNS3XXX
 766        default "debug/exynos.S" if DEBUG_EXYNOS_UART
 767        default "debug/highbank.S" if DEBUG_HIGHBANK_UART
 768        default "debug/icedcc.S" if DEBUG_ICEDCC
 769        default "debug/imx.S" if DEBUG_IMX1_UART || \
 770                                 DEBUG_IMX25_UART || \
 771                                 DEBUG_IMX21_IMX27_UART || \
 772                                 DEBUG_IMX31_UART || \
 773                                 DEBUG_IMX35_UART || \
 774                                 DEBUG_IMX51_UART || \
 775                                 DEBUG_IMX53_UART ||\
 776                                 DEBUG_IMX6Q_UART || \
 777                                 DEBUG_IMX6SL_UART
 778        default "debug/keystone.S" if DEBUG_KEYSTONE_UART0 || \
 779                                      DEBUG_KEYSTONE_UART1
 780        default "debug/mvebu.S" if DEBUG_MVEBU_UART || \
 781                                   DEBUG_MVEBU_UART_ALTERNATE
 782        default "debug/mxs.S" if DEBUG_IMX23_UART || DEBUG_IMX28_UART
 783        default "debug/nomadik.S" if DEBUG_NOMADIK_UART
 784        default "debug/nspire.S" if     DEBUG_NSPIRE_CX_UART || \
 785                                        DEBUG_NSPIRE_CLASSIC_UART
 786        default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
 787        default "debug/picoxcell.S" if DEBUG_PICOXCELL_UART
 788        default "debug/pxa.S" if DEBUG_PXA_UART1 || DEBUG_MMP_UART2 || \
 789                                 DEBUG_MMP_UART3
 790        default "debug/rockchip.S" if DEBUG_ROCKCHIP_UART
 791        default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
 792        default "debug/socfpga.S" if DEBUG_SOCFPGA_UART
 793        default "debug/sti.S" if DEBUG_STI_UART
 794        default "debug/sunxi.S" if DEBUG_SUNXI_UART0 || DEBUG_SUNXI_UART1
 795        default "debug/tegra.S" if DEBUG_TEGRA_UART
 796        default "debug/u300.S" if DEBUG_U300_UART
 797        default "debug/ux500.S" if DEBUG_UX500_UART
 798        default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT || \
 799                DEBUG_VEXPRESS_UART0_CA9 || DEBUG_VEXPRESS_UART0_RS1 || \
 800                DEBUG_VEXPRESS_UART0_CRX
 801        default "debug/vt8500.S" if DEBUG_VT8500_UART0
 802        default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
 803        default "mach/debug-macro.S"
 804
 805config DEBUG_UNCOMPRESS
 806        bool
 807        depends on ARCH_MULTIPLATFORM
 808        default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
 809                     !DEBUG_TEGRA_UART
 810        help
 811          This option influences the normal decompressor output for
 812          multiplatform kernels.  Normally, multiplatform kernels disable
 813          decompressor output because it is not possible to know where to
 814          send the decompressor output.
 815
 816          When this option is set, the selected DEBUG_LL output method
 817          will be re-used for normal decompressor output on multiplatform
 818          kernels.
 819          
 820
 821config UNCOMPRESS_INCLUDE
 822        string
 823        default "debug/uncompress.h" if ARCH_MULTIPLATFORM
 824        default "mach/uncompress.h"
 825
 826config EARLY_PRINTK
 827        bool "Early printk"
 828        depends on DEBUG_LL
 829        help
 830          Say Y here if you want to have an early console using the
 831          kernel low-level debugging functions. Add earlyprintk to your
 832          kernel parameters to enable this console.
 833
 834config OC_ETM
 835        bool "On-chip ETM and ETB"
 836        depends on ARM_AMBA
 837        help
 838          Enables the on-chip embedded trace macrocell and embedded trace
 839          buffer driver that will allow you to collect traces of the
 840          kernel code.
 841
 842config ARM_KPROBES_TEST
 843        tristate "Kprobes test module"
 844        depends on KPROBES && MODULES
 845        help
 846          Perform tests of kprobes API and instruction set simulation.
 847
 848config PID_IN_CONTEXTIDR
 849        bool "Write the current PID to the CONTEXTIDR register"
 850        depends on CPU_COPY_V6
 851        help
 852          Enabling this option causes the kernel to write the current PID to
 853          the PROCID field of the CONTEXTIDR register, at the expense of some
 854          additional instructions during context switch. Say Y here only if you
 855          are planning to use hardware trace tools with this kernel.
 856
 857endmenu
 858