1menu "Kernel hacking" 2 3source "lib/Kconfig.debug" 4 5config ARM_PTDUMP 6 bool "Export kernel pagetable layout to userspace via debugfs" 7 depends on DEBUG_KERNEL 8 select DEBUG_FS 9 ---help--- 10 Say Y here if you want to show the kernel pagetable layout in a 11 debugfs file. This information is only useful for kernel developers 12 who are working in architecture specific areas of the kernel. 13 It is probably not a good idea to enable this feature in a production 14 kernel. 15 If in doubt, say "N" 16 17config STRICT_DEVMEM 18 bool "Filter access to /dev/mem" 19 depends on MMU 20 ---help--- 21 If this option is disabled, you allow userspace (root) access to all 22 of memory, including kernel and userspace memory. Accidental 23 access to this is obviously disastrous, but specific access can 24 be used by people debugging the kernel. 25 26 If this option is switched on, the /dev/mem file only allows 27 userspace access to memory mapped peripherals. 28 29 If in doubt, say Y. 30 31# RMK wants arm kernels compiled with frame pointers or stack unwinding. 32# If you know what you are doing and are willing to live without stack 33# traces, you can get a slightly smaller kernel by setting this option to 34# n, but then RMK will have to kill you ;). 35config FRAME_POINTER 36 bool 37 depends on !THUMB2_KERNEL 38 default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER 39 help 40 If you say N here, the resulting kernel will be slightly smaller and 41 faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled, 42 when a problem occurs with the kernel, the information that is 43 reported is severely limited. 44 45config ARM_UNWIND 46 bool "Enable stack unwinding support (EXPERIMENTAL)" 47 depends on AEABI 48 default y 49 help 50 This option enables stack unwinding support in the kernel 51 using the information automatically generated by the 52 compiler. The resulting kernel image is slightly bigger but 53 the performance is not affected. Currently, this feature 54 only works with EABI compilers. If unsure say Y. 55 56config OLD_MCOUNT 57 bool 58 depends on FUNCTION_TRACER && FRAME_POINTER 59 default y 60 61config DEBUG_USER 62 bool "Verbose user fault messages" 63 help 64 When a user program crashes due to an exception, the kernel can 65 print a brief message explaining what the problem was. This is 66 sometimes helpful for debugging but serves no purpose on a 67 production system. Most people should say N here. 68 69 In addition, you need to pass user_debug=N on the kernel command 70 line to enable this feature. N consists of the sum of: 71 72 1 - undefined instruction events 73 2 - system calls 74 4 - invalid data aborts 75 8 - SIGSEGV faults 76 16 - SIGBUS faults 77 78# These options are only for real kernel hackers who want to get their hands dirty. 79config DEBUG_LL 80 bool "Kernel low-level debugging functions (read help!)" 81 depends on DEBUG_KERNEL 82 help 83 Say Y here to include definitions of printascii, printch, printhex 84 in the kernel. This is helpful if you are debugging code that 85 executes before the console is initialized. 86 87 Note that selecting this option will limit the kernel to a single 88 UART definition, as specified below. Attempting to boot the kernel 89 image on a different platform *will not work*, so this option should 90 not be enabled for kernels that are intended to be portable. 91 92choice 93 prompt "Kernel low-level debugging port" 94 depends on DEBUG_LL 95 96 config AT91_DEBUG_LL_DBGU0 97 bool "Kernel low-level debugging on rm9200, 9260/9g20, 9261/9g10 and 9rl" 98 depends on HAVE_AT91_DBGU0 99 100 config AT91_DEBUG_LL_DBGU1 101 bool "Kernel low-level debugging on 9263 and 9g45" 102 depends on HAVE_AT91_DBGU1 103 104 config DEBUG_BCM2835 105 bool "Kernel low-level debugging on BCM2835 PL011 UART" 106 depends on ARCH_BCM2835 107 select DEBUG_UART_PL01X 108 109 config DEBUG_BCM_KONA_UART 110 bool "Kernel low-level debugging messages via BCM KONA UART" 111 depends on ARCH_BCM 112 select DEBUG_UART_8250 113 help 114 Say Y here if you want kernel low-level debugging support 115 on Broadcom SoC platforms. 116 This low level debug works for Broadcom 117 mobile SoCs in the Kona family of chips (e.g. bcm28155, 118 bcm11351, etc...) 119 120 config DEBUG_BERLIN_UART 121 bool "Marvell Berlin SoC Debug UART" 122 depends on ARCH_BERLIN 123 select DEBUG_UART_8250 124 help 125 Say Y here if you want kernel low-level debugging support 126 on Marvell Berlin SoC based platforms. 127 128 config DEBUG_CLPS711X_UART1 129 bool "Kernel low-level debugging messages via UART1" 130 depends on ARCH_CLPS711X 131 help 132 Say Y here if you want the debug print routines to direct 133 their output to the first serial port on these devices. 134 135 config DEBUG_CLPS711X_UART2 136 bool "Kernel low-level debugging messages via UART2" 137 depends on ARCH_CLPS711X 138 help 139 Say Y here if you want the debug print routines to direct 140 their output to the second serial port on these devices. 141 142 config DEBUG_CNS3XXX 143 bool "Kernel Kernel low-level debugging on Cavium Networks CNS3xxx" 144 depends on ARCH_CNS3XXX 145 select DEBUG_UART_PL01X 146 help 147 Say Y here if you want the debug print routines to direct 148 their output to the CNS3xxx UART0. 149 150 config DEBUG_DAVINCI_DA8XX_UART1 151 bool "Kernel low-level debugging on DaVinci DA8XX using UART1" 152 depends on ARCH_DAVINCI_DA8XX 153 select DEBUG_UART_8250 154 help 155 Say Y here if you want the debug print routines to direct 156 their output to UART1 serial port on DaVinci DA8XX devices. 157 158 config DEBUG_DAVINCI_DA8XX_UART2 159 bool "Kernel low-level debugging on DaVinci DA8XX using UART2" 160 depends on ARCH_DAVINCI_DA8XX 161 select DEBUG_UART_8250 162 help 163 Say Y here if you want the debug print routines to direct 164 their output to UART2 serial port on DaVinci DA8XX devices. 165 166 config DEBUG_DAVINCI_DMx_UART0 167 bool "Kernel low-level debugging on DaVinci DMx using UART0" 168 depends on ARCH_DAVINCI_DMx 169 select DEBUG_UART_8250 170 help 171 Say Y here if you want the debug print routines to direct 172 their output to UART0 serial port on DaVinci DMx devices. 173 174 config DEBUG_DAVINCI_TNETV107X_UART1 175 bool "Kernel low-level debugging on DaVinci TNETV107x using UART1" 176 depends on ARCH_DAVINCI_TNETV107X 177 select DEBUG_UART_8250 178 help 179 Say Y here if you want the debug print routines to direct 180 their output to UART1 serial port on DaVinci TNETV107X 181 devices. 182 183 config DEBUG_ZYNQ_UART0 184 bool "Kernel low-level debugging on Xilinx Zynq using UART0" 185 depends on ARCH_ZYNQ 186 help 187 Say Y here if you want the debug print routines to direct 188 their output to UART0 on the Zynq platform. 189 190 config DEBUG_ZYNQ_UART1 191 bool "Kernel low-level debugging on Xilinx Zynq using UART1" 192 depends on ARCH_ZYNQ 193 help 194 Say Y here if you want the debug print routines to direct 195 their output to UART1 on the Zynq platform. 196 197 If you have a ZC702 board and want early boot messages to 198 appear on the USB serial adaptor, select this option. 199 200 config DEBUG_DC21285_PORT 201 bool "Kernel low-level debugging messages via footbridge serial port" 202 depends on FOOTBRIDGE 203 help 204 Say Y here if you want the debug print routines to direct 205 their output to the serial port in the DC21285 (Footbridge). 206 207 config DEBUG_FOOTBRIDGE_COM1 208 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1" 209 depends on FOOTBRIDGE 210 help 211 Say Y here if you want the debug print routines to direct 212 their output to the 8250 at PCI COM1. 213 214 config DEBUG_HI3620_UART 215 bool "Hisilicon HI3620 Debug UART" 216 depends on ARCH_HI3xxx 217 select DEBUG_UART_PL01X 218 help 219 Say Y here if you want kernel low-level debugging support 220 on HI3620 UART. 221 222 config DEBUG_HI3716_UART 223 bool "Hisilicon Hi3716 Debug UART" 224 depends on ARCH_HI3xxx 225 select DEBUG_UART_PL01X 226 help 227 Say Y here if you want kernel low-level debugging support 228 on HI3716 UART. 229 230 config DEBUG_HIGHBANK_UART 231 bool "Kernel low-level debugging messages via Highbank UART" 232 depends on ARCH_HIGHBANK 233 select DEBUG_UART_PL01X 234 help 235 Say Y here if you want the debug print routines to direct 236 their output to the UART on Highbank based devices. 237 238 config DEBUG_IMX1_UART 239 bool "i.MX1 Debug UART" 240 depends on SOC_IMX1 241 help 242 Say Y here if you want kernel low-level debugging support 243 on i.MX1. 244 245 config DEBUG_IMX23_UART 246 bool "i.MX23 Debug UART" 247 depends on SOC_IMX23 248 select DEBUG_UART_PL01X 249 help 250 Say Y here if you want kernel low-level debugging support 251 on i.MX23. 252 253 config DEBUG_IMX25_UART 254 bool "i.MX25 Debug UART" 255 depends on SOC_IMX25 256 help 257 Say Y here if you want kernel low-level debugging support 258 on i.MX25. 259 260 config DEBUG_IMX21_IMX27_UART 261 bool "i.MX21 and i.MX27 Debug UART" 262 depends on SOC_IMX21 || SOC_IMX27 263 help 264 Say Y here if you want kernel low-level debugging support 265 on i.MX21 or i.MX27. 266 267 config DEBUG_IMX28_UART 268 bool "i.MX28 Debug UART" 269 depends on SOC_IMX28 270 select DEBUG_UART_PL01X 271 help 272 Say Y here if you want kernel low-level debugging support 273 on i.MX28. 274 275 config DEBUG_IMX31_UART 276 bool "i.MX31 Debug UART" 277 depends on SOC_IMX31 278 help 279 Say Y here if you want kernel low-level debugging support 280 on i.MX31. 281 282 config DEBUG_IMX35_UART 283 bool "i.MX35 Debug UART" 284 depends on SOC_IMX35 285 help 286 Say Y here if you want kernel low-level debugging support 287 on i.MX35. 288 289 config DEBUG_IMX50_UART 290 bool "i.MX50 Debug UART" 291 depends on SOC_IMX50 292 help 293 Say Y here if you want kernel low-level debugging support 294 on i.MX50. 295 296 config DEBUG_IMX51_UART 297 bool "i.MX51 Debug UART" 298 depends on SOC_IMX51 299 help 300 Say Y here if you want kernel low-level debugging support 301 on i.MX51. 302 303 config DEBUG_IMX53_UART 304 bool "i.MX53 Debug UART" 305 depends on SOC_IMX53 306 help 307 Say Y here if you want kernel low-level debugging support 308 on i.MX53. 309 310 config DEBUG_IMX6Q_UART 311 bool "i.MX6Q/DL Debug UART" 312 depends on SOC_IMX6Q 313 help 314 Say Y here if you want kernel low-level debugging support 315 on i.MX6Q/DL. 316 317 config DEBUG_IMX6SL_UART 318 bool "i.MX6SL Debug UART" 319 depends on SOC_IMX6SL 320 help 321 Say Y here if you want kernel low-level debugging support 322 on i.MX6SL. 323 324 config DEBUG_KEYSTONE_UART0 325 bool "Kernel low-level debugging on KEYSTONE2 using UART0" 326 depends on ARCH_KEYSTONE 327 select DEBUG_UART_8250 328 help 329 Say Y here if you want the debug print routines to direct 330 their output to UART0 serial port on KEYSTONE2 devices. 331 332 config DEBUG_KEYSTONE_UART1 333 bool "Kernel low-level debugging on KEYSTONE2 using UART1" 334 depends on ARCH_KEYSTONE 335 select DEBUG_UART_8250 336 help 337 Say Y here if you want the debug print routines to direct 338 their output to UART1 serial port on KEYSTONE2 devices. 339 340 config DEBUG_MMP_UART2 341 bool "Kernel low-level debugging message via MMP UART2" 342 depends on ARCH_MMP 343 select DEBUG_UART_8250 344 help 345 Say Y here if you want kernel low-level debugging support 346 on MMP UART2. 347 348 config DEBUG_MMP_UART3 349 bool "Kernel low-level debugging message via MMP UART3" 350 depends on ARCH_MMP 351 select DEBUG_UART_8250 352 help 353 Say Y here if you want kernel low-level debugging support 354 on MMP UART3. 355 356 config DEBUG_MSM_UART1 357 bool "Kernel low-level debugging messages via MSM UART1" 358 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50 359 select DEBUG_MSM_UART 360 help 361 Say Y here if you want the debug print routines to direct 362 their output to the first serial port on MSM devices. 363 364 config DEBUG_MSM_UART2 365 bool "Kernel low-level debugging messages via MSM UART2" 366 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50 367 select DEBUG_MSM_UART 368 help 369 Say Y here if you want the debug print routines to direct 370 their output to the second serial port on MSM devices. 371 372 config DEBUG_MSM_UART3 373 bool "Kernel low-level debugging messages via MSM UART3" 374 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50 375 select DEBUG_MSM_UART 376 help 377 Say Y here if you want the debug print routines to direct 378 their output to the third serial port on MSM devices. 379 380 config DEBUG_MSM8660_UART 381 bool "Kernel low-level debugging messages via MSM 8660 UART" 382 depends on ARCH_MSM8X60 383 select MSM_HAS_DEBUG_UART_HS 384 select DEBUG_MSM_UART 385 help 386 Say Y here if you want the debug print routines to direct 387 their output to the serial port on MSM 8660 devices. 388 389 config DEBUG_MSM8960_UART 390 bool "Kernel low-level debugging messages via MSM 8960 UART" 391 depends on ARCH_MSM8960 392 select MSM_HAS_DEBUG_UART_HS 393 select DEBUG_MSM_UART 394 help 395 Say Y here if you want the debug print routines to direct 396 their output to the serial port on MSM 8960 devices. 397 398 config DEBUG_MSM8974_UART 399 bool "Kernel low-level debugging messages via MSM 8974 UART" 400 depends on ARCH_MSM8974 401 select MSM_HAS_DEBUG_UART_HS 402 select DEBUG_MSM_UART 403 help 404 Say Y here if you want the debug print routines to direct 405 their output to the serial port on MSM 8974 devices. 406 407 config DEBUG_MVEBU_UART 408 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)" 409 depends on ARCH_MVEBU 410 select DEBUG_UART_8250 411 help 412 Say Y here if you want kernel low-level debugging support 413 on MVEBU based platforms. 414 415 This option should be used with the old bootloaders 416 that left the internal registers mapped at 417 0xd0000000. As of today, this is the case on 418 platforms such as the Globalscale Mirabox or the 419 Plathome OpenBlocks AX3, when using the original 420 bootloader. 421 422 If the wrong DEBUG_MVEBU_UART* option is selected, 423 when u-boot hands over to the kernel, the system 424 silently crashes, with no serial output at all. 425 426 config DEBUG_MVEBU_UART_ALTERNATE 427 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)" 428 depends on ARCH_MVEBU 429 select DEBUG_UART_8250 430 help 431 Say Y here if you want kernel low-level debugging support 432 on MVEBU based platforms. 433 434 This option should be used with the new bootloaders 435 that remap the internal registers at 0xf1000000. 436 437 If the wrong DEBUG_MVEBU_UART* option is selected, 438 when u-boot hands over to the kernel, the system 439 silently crashes, with no serial output at all. 440 441 config DEBUG_VF_UART 442 bool "Vybrid UART" 443 depends on SOC_VF610 444 help 445 Say Y here if you want kernel low-level debugging support 446 on Vybrid based platforms. 447 448 config DEBUG_NOMADIK_UART 449 bool "Kernel low-level debugging messages via NOMADIK UART" 450 depends on ARCH_NOMADIK 451 select DEBUG_UART_PL01X 452 help 453 Say Y here if you want kernel low-level debugging support 454 on NOMADIK based platforms. 455 456 config DEBUG_NSPIRE_CLASSIC_UART 457 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART" 458 depends on ARCH_NSPIRE 459 select DEBUG_UART_8250 460 help 461 Say Y here if you want kernel low-level debugging support 462 on TI-NSPIRE classic models. 463 464 config DEBUG_NSPIRE_CX_UART 465 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART" 466 depends on ARCH_NSPIRE 467 select DEBUG_UART_PL01X 468 help 469 Say Y here if you want kernel low-level debugging support 470 on TI-NSPIRE CX models. 471 472 config DEBUG_OMAP2UART1 473 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)" 474 depends on ARCH_OMAP2PLUS 475 select DEBUG_OMAP2PLUS_UART 476 help 477 This covers at least h4, 2430sdp, 3430sdp, 3630sdp, 478 omap3 torpedo and 3530 lv som. 479 480 config DEBUG_OMAP2UART2 481 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2" 482 depends on ARCH_OMAP2PLUS 483 select DEBUG_OMAP2PLUS_UART 484 485 config DEBUG_OMAP2UART3 486 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)" 487 depends on ARCH_OMAP2PLUS 488 select DEBUG_OMAP2PLUS_UART 489 490 config DEBUG_OMAP3UART3 491 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)" 492 depends on ARCH_OMAP2PLUS 493 select DEBUG_OMAP2PLUS_UART 494 help 495 This covers at least cm_t3x, beagle, crane, devkit8000, 496 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook, 497 and 3517evm. 498 499 config DEBUG_OMAP4UART3 500 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)" 501 depends on ARCH_OMAP2PLUS 502 select DEBUG_OMAP2PLUS_UART 503 504 config DEBUG_OMAP3UART4 505 bool "Kernel low-level debugging messages via OMAP36XX UART4" 506 depends on ARCH_OMAP2PLUS 507 select DEBUG_OMAP2PLUS_UART 508 509 config DEBUG_OMAP4UART4 510 bool "Kernel low-level debugging messages via OMAP4/5 UART4" 511 depends on ARCH_OMAP2PLUS 512 select DEBUG_OMAP2PLUS_UART 513 514 config DEBUG_TI81XXUART1 515 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)" 516 depends on ARCH_OMAP2PLUS 517 select DEBUG_OMAP2PLUS_UART 518 519 config DEBUG_TI81XXUART2 520 bool "Kernel low-level debugging messages via TI81XX UART2" 521 depends on ARCH_OMAP2PLUS 522 select DEBUG_OMAP2PLUS_UART 523 524 config DEBUG_TI81XXUART3 525 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)" 526 depends on ARCH_OMAP2PLUS 527 select DEBUG_OMAP2PLUS_UART 528 529 config DEBUG_AM33XXUART1 530 bool "Kernel low-level debugging messages via AM33XX UART1" 531 depends on ARCH_OMAP2PLUS 532 select DEBUG_OMAP2PLUS_UART 533 534 config DEBUG_ZOOM_UART 535 bool "Kernel low-level debugging messages via Zoom2/3 UART" 536 depends on ARCH_OMAP2PLUS 537 select DEBUG_OMAP2PLUS_UART 538 539 config DEBUG_PICOXCELL_UART 540 depends on ARCH_PICOXCELL 541 bool "Use PicoXcell UART for low-level debug" 542 select DEBUG_UART_8250 543 help 544 Say Y here if you want kernel low-level debugging support 545 on PicoXcell based platforms. 546 547 config DEBUG_PXA_UART1 548 depends on ARCH_PXA 549 bool "Use PXA UART1 for low-level debug" 550 select DEBUG_UART_8250 551 help 552 Say Y here if you want kernel low-level debugging support 553 on PXA UART1. 554 555 config DEBUG_REALVIEW_STD_PORT 556 bool "RealView Default UART" 557 depends on ARCH_REALVIEW 558 select DEBUG_UART_PL01X 559 help 560 Say Y here if you want the debug print routines to direct 561 their output to the serial port on RealView EB, PB11MP, PBA8 562 and PBX platforms. 563 564 config DEBUG_REALVIEW_PB1176_PORT 565 bool "RealView PB1176 UART" 566 depends on MACH_REALVIEW_PB1176 567 select DEBUG_UART_PL01X 568 help 569 Say Y here if you want the debug print routines to direct 570 their output to the standard serial port on the RealView 571 PB1176 platform. 572 573 config DEBUG_RK29_UART0 574 bool "Kernel low-level debugging messages via Rockchip RK29 UART0" 575 depends on ARCH_ROCKCHIP 576 select DEBUG_UART_8250 577 help 578 Say Y here if you want kernel low-level debugging support 579 on Rockchip based platforms. 580 581 config DEBUG_RK29_UART1 582 bool "Kernel low-level debugging messages via Rockchip RK29 UART1" 583 depends on ARCH_ROCKCHIP 584 select DEBUG_UART_8250 585 help 586 Say Y here if you want kernel low-level debugging support 587 on Rockchip based platforms. 588 589 config DEBUG_RK29_UART2 590 bool "Kernel low-level debugging messages via Rockchip RK29 UART2" 591 depends on ARCH_ROCKCHIP 592 select DEBUG_UART_8250 593 help 594 Say Y here if you want kernel low-level debugging support 595 on Rockchip based platforms. 596 597 config DEBUG_RK3X_UART0 598 bool "Kernel low-level debugging messages via Rockchip RK3X UART0" 599 depends on ARCH_ROCKCHIP 600 select DEBUG_UART_8250 601 help 602 Say Y here if you want kernel low-level debugging support 603 on Rockchip based platforms. 604 605 config DEBUG_RK3X_UART1 606 bool "Kernel low-level debugging messages via Rockchip RK3X UART1" 607 depends on ARCH_ROCKCHIP 608 select DEBUG_UART_8250 609 help 610 Say Y here if you want kernel low-level debugging support 611 on Rockchip based platforms. 612 613 config DEBUG_RK3X_UART2 614 bool "Kernel low-level debugging messages via Rockchip RK3X UART2" 615 depends on ARCH_ROCKCHIP 616 select DEBUG_UART_8250 617 help 618 Say Y here if you want kernel low-level debugging support 619 on Rockchip based platforms. 620 621 config DEBUG_RK3X_UART3 622 bool "Kernel low-level debugging messages via Rockchip RK3X UART3" 623 depends on ARCH_ROCKCHIP 624 select DEBUG_UART_8250 625 help 626 Say Y here if you want kernel low-level debugging support 627 on Rockchip based platforms. 628 629 config DEBUG_S3C_UART0 630 depends on PLAT_SAMSUNG 631 select DEBUG_EXYNOS_UART if ARCH_EXYNOS 632 bool "Use S3C UART 0 for low-level debug" 633 help 634 Say Y here if you want the debug print routines to direct 635 their output to UART 0. The port must have been initialised 636 by the boot-loader before use. 637 638 The uncompressor code port configuration is now handled 639 by CONFIG_S3C_LOWLEVEL_UART_PORT. 640 641 config DEBUG_S3C_UART1 642 depends on PLAT_SAMSUNG 643 select DEBUG_EXYNOS_UART if ARCH_EXYNOS 644 bool "Use S3C UART 1 for low-level debug" 645 help 646 Say Y here if you want the debug print routines to direct 647 their output to UART 1. The port must have been initialised 648 by the boot-loader before use. 649 650 The uncompressor code port configuration is now handled 651 by CONFIG_S3C_LOWLEVEL_UART_PORT. 652 653 config DEBUG_S3C_UART2 654 depends on PLAT_SAMSUNG 655 select DEBUG_EXYNOS_UART if ARCH_EXYNOS 656 bool "Use S3C UART 2 for low-level debug" 657 help 658 Say Y here if you want the debug print routines to direct 659 their output to UART 2. The port must have been initialised 660 by the boot-loader before use. 661 662 The uncompressor code port configuration is now handled 663 by CONFIG_S3C_LOWLEVEL_UART_PORT. 664 665 config DEBUG_S3C_UART3 666 depends on PLAT_SAMSUNG && ARCH_EXYNOS 667 select DEBUG_EXYNOS_UART 668 bool "Use S3C UART 3 for low-level debug" 669 help 670 Say Y here if you want the debug print routines to direct 671 their output to UART 3. The port must have been initialised 672 by the boot-loader before use. 673 674 The uncompressor code port configuration is now handled 675 by CONFIG_S3C_LOWLEVEL_UART_PORT. 676 677 config DEBUG_SOCFPGA_UART 678 depends on ARCH_SOCFPGA 679 bool "Use SOCFPGA UART for low-level debug" 680 select DEBUG_UART_8250 681 help 682 Say Y here if you want kernel low-level debugging support 683 on SOCFPGA based platforms. 684 685 config DEBUG_SUNXI_UART0 686 bool "Kernel low-level debugging messages via sunXi UART0" 687 depends on ARCH_SUNXI 688 select DEBUG_UART_8250 689 help 690 Say Y here if you want kernel low-level debugging support 691 on Allwinner A1X based platforms on the UART0. 692 693 config DEBUG_SUNXI_UART1 694 bool "Kernel low-level debugging messages via sunXi UART1" 695 depends on ARCH_SUNXI 696 select DEBUG_UART_8250 697 help 698 Say Y here if you want kernel low-level debugging support 699 on Allwinner A1X based platforms on the UART1. 700 701 config TEGRA_DEBUG_UART_AUTO_ODMDATA 702 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA" 703 depends on ARCH_TEGRA 704 select DEBUG_TEGRA_UART 705 help 706 Automatically determines which UART to use for low-level 707 debug based on the ODMDATA value. This value is part of 708 the BCT, and is written to the boot memory device using 709 nvflash, or other flashing tool. When bits 19:18 are 3, 710 then bits 17:15 indicate which UART to use; 0/1/2/3/4 711 are UART A/B/C/D/E. 712 713 config TEGRA_DEBUG_UARTA 714 bool "Kernel low-level debugging messages via Tegra UART A" 715 depends on ARCH_TEGRA 716 select DEBUG_TEGRA_UART 717 help 718 Say Y here if you want kernel low-level debugging support 719 on Tegra based platforms. 720 721 config TEGRA_DEBUG_UARTB 722 bool "Kernel low-level debugging messages via Tegra UART B" 723 depends on ARCH_TEGRA 724 select DEBUG_TEGRA_UART 725 help 726 Say Y here if you want kernel low-level debugging support 727 on Tegra based platforms. 728 729 config TEGRA_DEBUG_UARTC 730 bool "Kernel low-level debugging messages via Tegra UART C" 731 depends on ARCH_TEGRA 732 select DEBUG_TEGRA_UART 733 help 734 Say Y here if you want kernel low-level debugging support 735 on Tegra based platforms. 736 737 config TEGRA_DEBUG_UARTD 738 bool "Kernel low-level debugging messages via Tegra UART D" 739 depends on ARCH_TEGRA 740 select DEBUG_TEGRA_UART 741 help 742 Say Y here if you want kernel low-level debugging support 743 on Tegra based platforms. 744 745 config TEGRA_DEBUG_UARTE 746 bool "Kernel low-level debugging messages via Tegra UART E" 747 depends on ARCH_TEGRA 748 select DEBUG_TEGRA_UART 749 help 750 Say Y here if you want kernel low-level debugging support 751 on Tegra based platforms. 752 753 config DEBUG_SIRFPRIMA2_UART1 754 bool "Kernel low-level debugging messages via SiRFprimaII UART1" 755 depends on ARCH_PRIMA2 756 help 757 Say Y here if you want the debug print routines to direct 758 their output to the uart1 port on SiRFprimaII devices. 759 760 config DEBUG_SIRFMARCO_UART1 761 bool "Kernel low-level debugging messages via SiRFmarco UART1" 762 depends on ARCH_MARCO 763 help 764 Say Y here if you want the debug print routines to direct 765 their output to the uart1 port on SiRFmarco devices. 766 767 config STIH41X_DEBUG_ASC2 768 bool "Use StiH415/416 ASC2 UART for low-level debug" 769 depends on ARCH_STI 770 select DEBUG_STI_UART 771 help 772 Say Y here if you want kernel low-level debugging support 773 on STiH415/416 based platforms like b2000, which has 774 default UART wired up to ASC2. 775 776 If unsure, say N. 777 778 config STIH41X_DEBUG_SBC_ASC1 779 bool "Use StiH415/416 SBC ASC1 UART for low-level debug" 780 depends on ARCH_STI 781 select DEBUG_STI_UART 782 help 783 Say Y here if you want kernel low-level debugging support 784 on STiH415/416 based platforms like b2020. which has 785 default UART wired up to SBC ASC1. 786 787 If unsure, say N. 788 789 config DEBUG_U300_UART 790 bool "Kernel low-level debugging messages via U300 UART0" 791 depends on ARCH_U300 792 select DEBUG_UART_PL01X 793 help 794 Say Y here if you want the debug print routines to direct 795 their output to the uart port on U300 devices. 796 797 config DEBUG_UX500_UART 798 depends on ARCH_U8500 799 bool "Use Ux500 UART for low-level debug" 800 help 801 Say Y here if you want kernel low-level debugging support 802 on Ux500 based platforms. 803 804 config DEBUG_VEXPRESS_UART0_DETECT 805 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles" 806 depends on ARCH_VEXPRESS && CPU_CP15_MMU 807 help 808 This option enables a simple heuristic which tries to determine 809 the motherboard's memory map variant (original or RS1) and then 810 choose the relevant UART0 base address. 811 812 Note that this will only work with standard A-class core tiles, 813 and may fail with non-standard SMM or custom software models. 814 815 config DEBUG_VEXPRESS_UART0_CA9 816 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)" 817 depends on ARCH_VEXPRESS 818 select DEBUG_UART_PL01X 819 help 820 This option selects UART0 at 0x10009000. Except for custom models, 821 this applies only to the V2P-CA9 tile. 822 823 config DEBUG_VEXPRESS_UART0_RS1 824 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)" 825 depends on ARCH_VEXPRESS 826 select DEBUG_UART_PL01X 827 help 828 This option selects UART0 at 0x1c090000. This applies to most 829 of the tiles using the RS1 memory map, including all new A-class 830 core tiles, FPGA-based SMMs and software models. 831 832 config DEBUG_VEXPRESS_UART0_CRX 833 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)" 834 depends on ARCH_VEXPRESS && !MMU 835 select DEBUG_UART_PL01X 836 help 837 This option selects UART0 at 0xb0090000. This is appropriate for 838 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7 839 840 config DEBUG_VT8500_UART0 841 bool "Use UART0 on VIA/Wondermedia SoCs" 842 depends on ARCH_VT8500 843 help 844 This option selects UART0 on VIA/Wondermedia System-on-a-chip 845 devices, including VT8500, WM8505, WM8650 and WM8850. 846 847 config DEBUG_LL_UART_NONE 848 bool "No low-level debugging UART" 849 depends on !ARCH_MULTIPLATFORM 850 help 851 Say Y here if your platform doesn't provide a UART option 852 above. This relies on your platform choosing the right UART 853 definition internally in order for low-level debugging to 854 work. 855 856 config DEBUG_ICEDCC 857 bool "Kernel low-level debugging via EmbeddedICE DCC channel" 858 help 859 Say Y here if you want the debug print routines to direct 860 their output to the EmbeddedICE macrocell's DCC channel using 861 co-processor 14. This is known to work on the ARM9 style ICE 862 channel and on the XScale with the PEEDI. 863 864 Note that the system will appear to hang during boot if there 865 is nothing connected to read from the DCC. 866 867 config DEBUG_SEMIHOSTING 868 bool "Kernel low-level debug output via semihosting I/O" 869 help 870 Semihosting enables code running on an ARM target to use 871 the I/O facilities on a host debugger/emulator through a 872 simple SVC call. The host debugger or emulator must have 873 semihosting enabled for the special svc call to be trapped 874 otherwise the kernel will crash. 875 876 This is known to work with OpenOCD, as well as 877 ARM's Fast Models, or any other controlling environment 878 that implements semihosting. 879 880 For more details about semihosting, please see 881 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd. 882 883 config DEBUG_LL_UART_8250 884 bool "Kernel low-level debugging via 8250 UART" 885 help 886 Say Y here if you wish the debug print routes to direct 887 their output to an 8250 UART. You can use this option 888 to provide the parameters for the 8250 UART rather than 889 selecting one of the platform specific options above if 890 you know the parameters for the port. 891 892 This option is preferred over the platform specific 893 options; the platform specific options are deprecated 894 and will be soon removed. 895 896 config DEBUG_LL_UART_EFM32 897 bool "Kernel low-level debugging via efm32 UART" 898 depends on ARCH_EFM32 899 help 900 Say Y here if you want the debug print routines to direct 901 their output to an UART or USART port on efm32 based 902 machines. Use the following addresses for DEBUG_UART_PHYS: 903 904 0x4000c000 | USART0 905 0x4000c400 | USART1 906 0x4000c800 | USART2 907 0x4000e000 | UART0 908 0x4000e400 | UART1 909 910 config DEBUG_LL_UART_PL01X 911 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART" 912 help 913 Say Y here if you wish the debug print routes to direct 914 their output to a PL01x Primecell UART. You can use 915 this option to provide the parameters for the UART 916 rather than selecting one of the platform specific 917 options above if you know the parameters for the port. 918 919 This option is preferred over the platform specific 920 options; the platform specific options are deprecated 921 and will be soon removed. 922 923endchoice 924 925config DEBUG_EXYNOS_UART 926 bool 927 928config DEBUG_OMAP2PLUS_UART 929 bool 930 depends on ARCH_OMAP2PLUS 931 932config DEBUG_IMX_UART_PORT 933 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \ 934 DEBUG_IMX25_UART || \ 935 DEBUG_IMX21_IMX27_UART || \ 936 DEBUG_IMX31_UART || \ 937 DEBUG_IMX35_UART || \ 938 DEBUG_IMX50_UART || \ 939 DEBUG_IMX51_UART || \ 940 DEBUG_IMX53_UART || \ 941 DEBUG_IMX6Q_UART || \ 942 DEBUG_IMX6SL_UART 943 default 1 944 depends on ARCH_MXC 945 help 946 Choose UART port on which kernel low-level debug messages 947 should be output. 948 949config DEBUG_TEGRA_UART 950 bool 951 depends on ARCH_TEGRA 952 953config DEBUG_STI_UART 954 bool 955 depends on ARCH_STI 956 957config DEBUG_MSM_UART 958 bool 959 depends on ARCH_MSM 960 961config DEBUG_LL_INCLUDE 962 string 963 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250 964 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X 965 default "debug/exynos.S" if DEBUG_EXYNOS_UART 966 default "debug/efm32.S" if DEBUG_LL_UART_EFM32 967 default "debug/icedcc.S" if DEBUG_ICEDCC 968 default "debug/imx.S" if DEBUG_IMX1_UART || \ 969 DEBUG_IMX25_UART || \ 970 DEBUG_IMX21_IMX27_UART || \ 971 DEBUG_IMX31_UART || \ 972 DEBUG_IMX35_UART || \ 973 DEBUG_IMX50_UART || \ 974 DEBUG_IMX51_UART || \ 975 DEBUG_IMX53_UART ||\ 976 DEBUG_IMX6Q_UART || \ 977 DEBUG_IMX6SL_UART 978 default "debug/msm.S" if DEBUG_MSM_UART 979 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART 980 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1 981 default "debug/sti.S" if DEBUG_STI_UART 982 default "debug/tegra.S" if DEBUG_TEGRA_UART 983 default "debug/ux500.S" if DEBUG_UX500_UART 984 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT 985 default "debug/vf.S" if DEBUG_VF_UART 986 default "debug/vt8500.S" if DEBUG_VT8500_UART0 987 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1 988 default "mach/debug-macro.S" 989 990# Compatibility options for PL01x 991config DEBUG_UART_PL01X 992 def_bool ARCH_EP93XX || \ 993 ARCH_INTEGRATOR || \ 994 ARCH_SPEAR3XX || \ 995 ARCH_SPEAR6XX || \ 996 ARCH_SPEAR13XX || \ 997 ARCH_VERSATILE 998 999# Compatibility options for 8250 1000config DEBUG_UART_8250 1001 def_bool ARCH_DOVE || ARCH_EBSA110 || \ 1002 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \ 1003 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \ 1004 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \ 1005 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC 1006 1007config DEBUG_UART_PHYS 1008 hex "Physical base address of debug UART" 1009 default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0 1010 default 0x01c28000 if DEBUG_SUNXI_UART0 1011 default 0x01c28400 if DEBUG_SUNXI_UART1 1012 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1 1013 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2 1014 default 0x02530c00 if DEBUG_KEYSTONE_UART0 1015 default 0x02531000 if DEBUG_KEYSTONE_UART1 1016 default 0x03010fe0 if ARCH_RPC 1017 default 0x08108300 if DEBUG_DAVINCI_TNETV107X_UART1 1018 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \ 1019 DEBUG_VEXPRESS_UART0_CA9 1020 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT 1021 default 0x10124000 if DEBUG_RK3X_UART0 1022 default 0x10126000 if DEBUG_RK3X_UART1 1023 default 0x101f1000 if ARCH_VERSATILE 1024 default 0x101fb000 if DEBUG_NOMADIK_UART 1025 default 0x16000000 if ARCH_INTEGRATOR 1026 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1 1027 default 0x20060000 if DEBUG_RK29_UART0 1028 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2 1029 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3 1030 default 0x20201000 if DEBUG_BCM2835 1031 default 0x3e000000 if DEBUG_BCM_KONA_UART 1032 default 0x4000e400 if DEBUG_LL_UART_EFM32 1033 default 0x40090000 if ARCH_LPC32XX 1034 default 0x40100000 if DEBUG_PXA_UART1 1035 default 0x42000000 if ARCH_GEMINI 1036 default 0x7c0003f8 if FOOTBRIDGE 1037 default 0x80230000 if DEBUG_PICOXCELL_UART 1038 default 0x80070000 if DEBUG_IMX23_UART 1039 default 0x80074000 if DEBUG_IMX28_UART 1040 default 0x808c0000 if ARCH_EP93XX 1041 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART 1042 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX 1043 default 0xc0013000 if DEBUG_U300_UART 1044 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN 1045 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN 1046 default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX 1047 default 0xd0012000 if DEBUG_MVEBU_UART 1048 default 0xd4017000 if DEBUG_MMP_UART2 1049 default 0xd4018000 if DEBUG_MMP_UART3 1050 default 0xe0000000 if ARCH_SPEAR13XX 1051 default 0xf0000be0 if ARCH_EBSA110 1052 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE 1053 default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \ 1054 ARCH_ORION5X 1055 default 0xf7fc9000 if DEBUG_BERLIN_UART 1056 default 0xf8b00000 if DEBUG_HI3716_UART 1057 default 0xfcb00000 if DEBUG_HI3620_UART 1058 default 0xfe800000 if ARCH_IOP32X 1059 default 0xffc02000 if DEBUG_SOCFPGA_UART 1060 default 0xffd82340 if ARCH_IOP13XX 1061 default 0xfff36000 if DEBUG_HIGHBANK_UART 1062 default 0xfffff700 if ARCH_IOP33X 1063 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \ 1064 DEBUG_LL_UART_EFM32 || \ 1065 DEBUG_UART_8250 || DEBUG_UART_PL01X 1066 1067config DEBUG_UART_VIRT 1068 hex "Virtual base address of debug UART" 1069 default 0xe0010fe0 if ARCH_RPC 1070 default 0xf0000be0 if ARCH_EBSA110 1071 default 0xf0009000 if DEBUG_CNS3XXX 1072 default 0xf01fb000 if DEBUG_NOMADIK_UART 1073 default 0xf0201000 if DEBUG_BCM2835 1074 default 0xf11f1000 if ARCH_VERSATILE 1075 default 0xf1600000 if ARCH_INTEGRATOR 1076 default 0xf1c28000 if DEBUG_SUNXI_UART0 1077 default 0xf1c28400 if DEBUG_SUNXI_UART1 1078 default 0xf2100000 if DEBUG_PXA_UART1 1079 default 0xf4090000 if ARCH_LPC32XX 1080 default 0xf4200000 if ARCH_GEMINI 1081 default 0xf7fc9000 if DEBUG_BERLIN_UART 1082 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9 1083 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1 1084 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT 1085 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT 1086 default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX 1087 default 0xfd000000 if ARCH_SPEAR13XX 1088 default 0xfd012000 if ARCH_MV78XX0 1089 default 0xfde12000 if ARCH_DOVE 1090 default 0xfe012000 if ARCH_ORION5X 1091 default 0xfe017000 if DEBUG_MMP_UART2 1092 default 0xfe018000 if DEBUG_MMP_UART3 1093 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART 1094 default 0xfe230000 if DEBUG_PICOXCELL_UART 1095 default 0xfe300000 if DEBUG_BCM_KONA_UART 1096 default 0xfe800000 if ARCH_IOP32X 1097 default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HI3716_UART 1098 default 0xfeb24000 if DEBUG_RK3X_UART0 1099 default 0xfeb26000 if DEBUG_RK3X_UART1 1100 default 0xfeb30c00 if DEBUG_KEYSTONE_UART0 1101 default 0xfeb31000 if DEBUG_KEYSTONE_UART1 1102 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE 1103 default 0xfed60000 if DEBUG_RK29_UART0 1104 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2 1105 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3 1106 default 0xfec02000 if DEBUG_SOCFPGA_UART 1107 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0 1108 default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1 1109 default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2 1110 default 0xfed12000 if ARCH_KIRKWOOD 1111 default 0xfedc0000 if ARCH_EP93XX 1112 default 0xfee003f8 if FOOTBRIDGE 1113 default 0xfee08300 if DEBUG_DAVINCI_TNETV107X_UART1 1114 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART 1115 default 0xfef36000 if DEBUG_HIGHBANK_UART 1116 default 0xfee82340 if ARCH_IOP13XX 1117 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN 1118 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN 1119 default 0xfefff700 if ARCH_IOP33X 1120 default 0xff003000 if DEBUG_U300_UART 1121 default DEBUG_UART_PHYS if !MMU 1122 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \ 1123 DEBUG_UART_8250 || DEBUG_UART_PL01X 1124 1125config DEBUG_UART_8250_SHIFT 1126 int "Register offset shift for the 8250 debug UART" 1127 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250 1128 default 0 if FOOTBRIDGE || ARCH_IOP32X 1129 default 2 1130 1131config DEBUG_UART_8250_WORD 1132 bool "Use 32-bit accesses for 8250 UART" 1133 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250 1134 depends on DEBUG_UART_8250_SHIFT >= 2 1135 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \ 1136 ARCH_KEYSTONE || \ 1137 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \ 1138 DEBUG_DAVINCI_DA8XX_UART2 || DEBUG_DAVINCI_TNETV107X_UART1 || \ 1139 DEBUG_BCM_KONA_UART 1140 1141config DEBUG_UART_8250_FLOW_CONTROL 1142 bool "Enable flow control for 8250 UART" 1143 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250 1144 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC 1145 1146config DEBUG_UNCOMPRESS 1147 bool 1148 depends on ARCH_MULTIPLATFORM || ARCH_MSM 1149 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \ 1150 (!DEBUG_TEGRA_UART || !ZBOOT_ROM) 1151 help 1152 This option influences the normal decompressor output for 1153 multiplatform kernels. Normally, multiplatform kernels disable 1154 decompressor output because it is not possible to know where to 1155 send the decompressor output. 1156 1157 When this option is set, the selected DEBUG_LL output method 1158 will be re-used for normal decompressor output on multiplatform 1159 kernels. 1160 1161 1162config UNCOMPRESS_INCLUDE 1163 string 1164 default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM 1165 default "mach/uncompress.h" 1166 1167config EARLY_PRINTK 1168 bool "Early printk" 1169 depends on DEBUG_LL 1170 help 1171 Say Y here if you want to have an early console using the 1172 kernel low-level debugging functions. Add earlyprintk to your 1173 kernel parameters to enable this console. 1174 1175config OC_ETM 1176 bool "On-chip ETM and ETB" 1177 depends on ARM_AMBA 1178 help 1179 Enables the on-chip embedded trace macrocell and embedded trace 1180 buffer driver that will allow you to collect traces of the 1181 kernel code. 1182 1183config ARM_KPROBES_TEST 1184 tristate "Kprobes test module" 1185 depends on KPROBES && MODULES 1186 help 1187 Perform tests of kprobes API and instruction set simulation. 1188 1189config PID_IN_CONTEXTIDR 1190 bool "Write the current PID to the CONTEXTIDR register" 1191 depends on CPU_COPY_V6 1192 help 1193 Enabling this option causes the kernel to write the current PID to 1194 the PROCID field of the CONTEXTIDR register, at the expense of some 1195 additional instructions during context switch. Say Y here only if you 1196 are planning to use hardware trace tools with this kernel. 1197 1198config DEBUG_SET_MODULE_RONX 1199 bool "Set loadable kernel module data as NX and text as RO" 1200 depends on MODULES 1201 ---help--- 1202 This option helps catch unintended modifications to loadable 1203 kernel module's text and read-only data. It also prevents execution 1204 of module data. Such protection may interfere with run-time code 1205 patching and dynamic kernel tracing - and they might also protect 1206 against certain classes of kernel exploits. 1207 If in doubt, say "N". 1208 1209endmenu 1210