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_5301X 110 bool "Kernel low-level debugging on BCM5301X UART1" 111 depends on ARCH_BCM_5301X 112 select DEBUG_UART_PL01X 113 114 config DEBUG_BCM_KONA_UART 115 bool "Kernel low-level debugging messages via BCM KONA UART" 116 depends on ARCH_BCM_MOBILE 117 select DEBUG_UART_8250 118 help 119 Say Y here if you want kernel low-level debugging support 120 on Broadcom SoC platforms. 121 This low level debug works for Broadcom 122 mobile SoCs in the Kona family of chips (e.g. bcm28155, 123 bcm11351, etc...) 124 125 config DEBUG_BERLIN_UART 126 bool "Marvell Berlin SoC Debug UART" 127 depends on ARCH_BERLIN 128 select DEBUG_UART_8250 129 help 130 Say Y here if you want kernel low-level debugging support 131 on Marvell Berlin SoC based platforms. 132 133 config DEBUG_CLPS711X_UART1 134 bool "Kernel low-level debugging messages via UART1" 135 depends on ARCH_CLPS711X 136 help 137 Say Y here if you want the debug print routines to direct 138 their output to the first serial port on these devices. 139 140 config DEBUG_CLPS711X_UART2 141 bool "Kernel low-level debugging messages via UART2" 142 depends on ARCH_CLPS711X 143 help 144 Say Y here if you want the debug print routines to direct 145 their output to the second serial port on these devices. 146 147 config DEBUG_CNS3XXX 148 bool "Kernel Kernel low-level debugging on Cavium Networks CNS3xxx" 149 depends on ARCH_CNS3XXX 150 select DEBUG_UART_PL01X 151 help 152 Say Y here if you want the debug print routines to direct 153 their output to the CNS3xxx UART0. 154 155 config DEBUG_DAVINCI_DA8XX_UART1 156 bool "Kernel low-level debugging on DaVinci DA8XX using UART1" 157 depends on ARCH_DAVINCI_DA8XX 158 select DEBUG_UART_8250 159 help 160 Say Y here if you want the debug print routines to direct 161 their output to UART1 serial port on DaVinci DA8XX devices. 162 163 config DEBUG_DAVINCI_DA8XX_UART2 164 bool "Kernel low-level debugging on DaVinci DA8XX using UART2" 165 depends on ARCH_DAVINCI_DA8XX 166 select DEBUG_UART_8250 167 help 168 Say Y here if you want the debug print routines to direct 169 their output to UART2 serial port on DaVinci DA8XX devices. 170 171 config DEBUG_DAVINCI_DMx_UART0 172 bool "Kernel low-level debugging on DaVinci DMx using UART0" 173 depends on ARCH_DAVINCI_DMx 174 select DEBUG_UART_8250 175 help 176 Say Y here if you want the debug print routines to direct 177 their output to UART0 serial port on DaVinci DMx devices. 178 179 config DEBUG_ZYNQ_UART0 180 bool "Kernel low-level debugging on Xilinx Zynq using UART0" 181 depends on ARCH_ZYNQ 182 help 183 Say Y here if you want the debug print routines to direct 184 their output to UART0 on the Zynq platform. 185 186 config DEBUG_ZYNQ_UART1 187 bool "Kernel low-level debugging on Xilinx Zynq using UART1" 188 depends on ARCH_ZYNQ 189 help 190 Say Y here if you want the debug print routines to direct 191 their output to UART1 on the Zynq platform. 192 193 If you have a ZC702 board and want early boot messages to 194 appear on the USB serial adaptor, select this option. 195 196 config DEBUG_DC21285_PORT 197 bool "Kernel low-level debugging messages via footbridge serial port" 198 depends on FOOTBRIDGE 199 help 200 Say Y here if you want the debug print routines to direct 201 their output to the serial port in the DC21285 (Footbridge). 202 203 config DEBUG_FOOTBRIDGE_COM1 204 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1" 205 depends on FOOTBRIDGE 206 help 207 Say Y here if you want the debug print routines to direct 208 their output to the 8250 at PCI COM1. 209 210 config DEBUG_HI3620_UART 211 bool "Hisilicon HI3620 Debug UART" 212 depends on ARCH_HI3xxx 213 select DEBUG_UART_PL01X 214 help 215 Say Y here if you want kernel low-level debugging support 216 on HI3620 UART. 217 218 config DEBUG_HI3716_UART 219 bool "Hisilicon Hi3716 Debug UART" 220 depends on ARCH_HI3xxx 221 select DEBUG_UART_PL01X 222 help 223 Say Y here if you want kernel low-level debugging support 224 on HI3716 UART. 225 226 config DEBUG_HIGHBANK_UART 227 bool "Kernel low-level debugging messages via Highbank UART" 228 depends on ARCH_HIGHBANK 229 select DEBUG_UART_PL01X 230 help 231 Say Y here if you want the debug print routines to direct 232 their output to the UART on Highbank based devices. 233 234 config DEBUG_IMX1_UART 235 bool "i.MX1 Debug UART" 236 depends on SOC_IMX1 237 help 238 Say Y here if you want kernel low-level debugging support 239 on i.MX1. 240 241 config DEBUG_IMX23_UART 242 bool "i.MX23 Debug UART" 243 depends on SOC_IMX23 244 select DEBUG_UART_PL01X 245 help 246 Say Y here if you want kernel low-level debugging support 247 on i.MX23. 248 249 config DEBUG_IMX25_UART 250 bool "i.MX25 Debug UART" 251 depends on SOC_IMX25 252 help 253 Say Y here if you want kernel low-level debugging support 254 on i.MX25. 255 256 config DEBUG_IMX21_IMX27_UART 257 bool "i.MX21 and i.MX27 Debug UART" 258 depends on SOC_IMX21 || SOC_IMX27 259 help 260 Say Y here if you want kernel low-level debugging support 261 on i.MX21 or i.MX27. 262 263 config DEBUG_IMX28_UART 264 bool "i.MX28 Debug UART" 265 depends on SOC_IMX28 266 select DEBUG_UART_PL01X 267 help 268 Say Y here if you want kernel low-level debugging support 269 on i.MX28. 270 271 config DEBUG_IMX31_UART 272 bool "i.MX31 Debug UART" 273 depends on SOC_IMX31 274 help 275 Say Y here if you want kernel low-level debugging support 276 on i.MX31. 277 278 config DEBUG_IMX35_UART 279 bool "i.MX35 Debug UART" 280 depends on SOC_IMX35 281 help 282 Say Y here if you want kernel low-level debugging support 283 on i.MX35. 284 285 config DEBUG_IMX50_UART 286 bool "i.MX50 Debug UART" 287 depends on SOC_IMX50 288 help 289 Say Y here if you want kernel low-level debugging support 290 on i.MX50. 291 292 config DEBUG_IMX51_UART 293 bool "i.MX51 Debug UART" 294 depends on SOC_IMX51 295 help 296 Say Y here if you want kernel low-level debugging support 297 on i.MX51. 298 299 config DEBUG_IMX53_UART 300 bool "i.MX53 Debug UART" 301 depends on SOC_IMX53 302 help 303 Say Y here if you want kernel low-level debugging support 304 on i.MX53. 305 306 config DEBUG_IMX6Q_UART 307 bool "i.MX6Q/DL Debug UART" 308 depends on SOC_IMX6Q 309 help 310 Say Y here if you want kernel low-level debugging support 311 on i.MX6Q/DL. 312 313 config DEBUG_IMX6SL_UART 314 bool "i.MX6SL Debug UART" 315 depends on SOC_IMX6SL 316 help 317 Say Y here if you want kernel low-level debugging support 318 on i.MX6SL. 319 320 config DEBUG_KEYSTONE_UART0 321 bool "Kernel low-level debugging on KEYSTONE2 using UART0" 322 depends on ARCH_KEYSTONE 323 select DEBUG_UART_8250 324 help 325 Say Y here if you want the debug print routines to direct 326 their output to UART0 serial port on KEYSTONE2 devices. 327 328 config DEBUG_KEYSTONE_UART1 329 bool "Kernel low-level debugging on KEYSTONE2 using UART1" 330 depends on ARCH_KEYSTONE 331 select DEBUG_UART_8250 332 help 333 Say Y here if you want the debug print routines to direct 334 their output to UART1 serial port on KEYSTONE2 devices. 335 336 config DEBUG_MMP_UART2 337 bool "Kernel low-level debugging message via MMP UART2" 338 depends on ARCH_MMP 339 select DEBUG_UART_8250 340 help 341 Say Y here if you want kernel low-level debugging support 342 on MMP UART2. 343 344 config DEBUG_MMP_UART3 345 bool "Kernel low-level debugging message via MMP UART3" 346 depends on ARCH_MMP 347 select DEBUG_UART_8250 348 help 349 Say Y here if you want kernel low-level debugging support 350 on MMP UART3. 351 352 config DEBUG_MSM_UART1 353 bool "Kernel low-level debugging messages via MSM UART1" 354 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50 355 select DEBUG_MSM_UART 356 help 357 Say Y here if you want the debug print routines to direct 358 their output to the first serial port on MSM devices. 359 360 config DEBUG_MSM_UART2 361 bool "Kernel low-level debugging messages via MSM UART2" 362 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50 363 select DEBUG_MSM_UART 364 help 365 Say Y here if you want the debug print routines to direct 366 their output to the second serial port on MSM devices. 367 368 config DEBUG_MSM_UART3 369 bool "Kernel low-level debugging messages via MSM UART3" 370 depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50 371 select DEBUG_MSM_UART 372 help 373 Say Y here if you want the debug print routines to direct 374 their output to the third serial port on MSM devices. 375 376 config DEBUG_MSM8660_UART 377 bool "Kernel low-level debugging messages via MSM 8660 UART" 378 depends on ARCH_MSM8X60 379 select MSM_HAS_DEBUG_UART_HS 380 select DEBUG_MSM_UART 381 help 382 Say Y here if you want the debug print routines to direct 383 their output to the serial port on MSM 8660 devices. 384 385 config DEBUG_MSM8960_UART 386 bool "Kernel low-level debugging messages via MSM 8960 UART" 387 depends on ARCH_MSM8960 388 select MSM_HAS_DEBUG_UART_HS 389 select DEBUG_MSM_UART 390 help 391 Say Y here if you want the debug print routines to direct 392 their output to the serial port on MSM 8960 devices. 393 394 config DEBUG_MSM8974_UART 395 bool "Kernel low-level debugging messages via MSM 8974 UART" 396 depends on ARCH_MSM8974 397 select MSM_HAS_DEBUG_UART_HS 398 select DEBUG_MSM_UART 399 help 400 Say Y here if you want the debug print routines to direct 401 their output to the serial port on MSM 8974 devices. 402 403 config DEBUG_MVEBU_UART 404 bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)" 405 depends on ARCH_MVEBU 406 select DEBUG_UART_8250 407 help 408 Say Y here if you want kernel low-level debugging support 409 on MVEBU based platforms. 410 411 This option should be used with the old bootloaders 412 that left the internal registers mapped at 413 0xd0000000. As of today, this is the case on 414 platforms such as the Globalscale Mirabox or the 415 Plathome OpenBlocks AX3, when using the original 416 bootloader. 417 418 If the wrong DEBUG_MVEBU_UART* option is selected, 419 when u-boot hands over to the kernel, the system 420 silently crashes, with no serial output at all. 421 422 config DEBUG_MVEBU_UART_ALTERNATE 423 bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)" 424 depends on ARCH_MVEBU 425 select DEBUG_UART_8250 426 help 427 Say Y here if you want kernel low-level debugging support 428 on MVEBU based platforms. 429 430 This option should be used with the new bootloaders 431 that remap the internal registers at 0xf1000000. 432 433 If the wrong DEBUG_MVEBU_UART* option is selected, 434 when u-boot hands over to the kernel, the system 435 silently crashes, with no serial output at all. 436 437 config DEBUG_VF_UART 438 bool "Vybrid UART" 439 depends on SOC_VF610 440 help 441 Say Y here if you want kernel low-level debugging support 442 on Vybrid based platforms. 443 444 config DEBUG_NOMADIK_UART 445 bool "Kernel low-level debugging messages via NOMADIK UART" 446 depends on ARCH_NOMADIK 447 select DEBUG_UART_PL01X 448 help 449 Say Y here if you want kernel low-level debugging support 450 on NOMADIK based platforms. 451 452 config DEBUG_NSPIRE_CLASSIC_UART 453 bool "Kernel low-level debugging via TI-NSPIRE 8250 UART" 454 depends on ARCH_NSPIRE 455 select DEBUG_UART_8250 456 help 457 Say Y here if you want kernel low-level debugging support 458 on TI-NSPIRE classic models. 459 460 config DEBUG_NSPIRE_CX_UART 461 bool "Kernel low-level debugging via TI-NSPIRE PL011 UART" 462 depends on ARCH_NSPIRE 463 select DEBUG_UART_PL01X 464 help 465 Say Y here if you want kernel low-level debugging support 466 on TI-NSPIRE CX models. 467 468 config DEBUG_OMAP2UART1 469 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)" 470 depends on ARCH_OMAP2PLUS 471 select DEBUG_OMAP2PLUS_UART 472 help 473 This covers at least h4, 2430sdp, 3430sdp, 3630sdp, 474 omap3 torpedo and 3530 lv som. 475 476 config DEBUG_OMAP2UART2 477 bool "Kernel low-level debugging messages via OMAP2/3/4 UART2" 478 depends on ARCH_OMAP2PLUS 479 select DEBUG_OMAP2PLUS_UART 480 481 config DEBUG_OMAP2UART3 482 bool "Kernel low-level debugging messages via OMAP2 UART3 (n8x0)" 483 depends on ARCH_OMAP2PLUS 484 select DEBUG_OMAP2PLUS_UART 485 486 config DEBUG_OMAP3UART3 487 bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)" 488 depends on ARCH_OMAP2PLUS 489 select DEBUG_OMAP2PLUS_UART 490 help 491 This covers at least cm_t3x, beagle, crane, devkit8000, 492 igep00x0, ldp, n900, n9(50), pandora, overo, touchbook, 493 and 3517evm. 494 495 config DEBUG_OMAP4UART3 496 bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)" 497 depends on ARCH_OMAP2PLUS 498 select DEBUG_OMAP2PLUS_UART 499 500 config DEBUG_OMAP3UART4 501 bool "Kernel low-level debugging messages via OMAP36XX UART4" 502 depends on ARCH_OMAP2PLUS 503 select DEBUG_OMAP2PLUS_UART 504 505 config DEBUG_OMAP4UART4 506 bool "Kernel low-level debugging messages via OMAP4/5 UART4" 507 depends on ARCH_OMAP2PLUS 508 select DEBUG_OMAP2PLUS_UART 509 510 config DEBUG_TI81XXUART1 511 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)" 512 depends on ARCH_OMAP2PLUS 513 select DEBUG_OMAP2PLUS_UART 514 515 config DEBUG_TI81XXUART2 516 bool "Kernel low-level debugging messages via TI81XX UART2" 517 depends on ARCH_OMAP2PLUS 518 select DEBUG_OMAP2PLUS_UART 519 520 config DEBUG_TI81XXUART3 521 bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)" 522 depends on ARCH_OMAP2PLUS 523 select DEBUG_OMAP2PLUS_UART 524 525 config DEBUG_AM33XXUART1 526 bool "Kernel low-level debugging messages via AM33XX UART1" 527 depends on ARCH_OMAP2PLUS 528 select DEBUG_OMAP2PLUS_UART 529 530 config DEBUG_ZOOM_UART 531 bool "Kernel low-level debugging messages via Zoom2/3 UART" 532 depends on ARCH_OMAP2PLUS 533 select DEBUG_OMAP2PLUS_UART 534 535 config DEBUG_PICOXCELL_UART 536 depends on ARCH_PICOXCELL 537 bool "Use PicoXcell UART for low-level debug" 538 select DEBUG_UART_8250 539 help 540 Say Y here if you want kernel low-level debugging support 541 on PicoXcell based platforms. 542 543 config DEBUG_PXA_UART1 544 depends on ARCH_PXA 545 bool "Use PXA UART1 for low-level debug" 546 select DEBUG_UART_8250 547 help 548 Say Y here if you want kernel low-level debugging support 549 on PXA UART1. 550 551 config DEBUG_REALVIEW_STD_PORT 552 bool "RealView Default UART" 553 depends on ARCH_REALVIEW 554 select DEBUG_UART_PL01X 555 help 556 Say Y here if you want the debug print routines to direct 557 their output to the serial port on RealView EB, PB11MP, PBA8 558 and PBX platforms. 559 560 config DEBUG_REALVIEW_PB1176_PORT 561 bool "RealView PB1176 UART" 562 depends on MACH_REALVIEW_PB1176 563 select DEBUG_UART_PL01X 564 help 565 Say Y here if you want the debug print routines to direct 566 their output to the standard serial port on the RealView 567 PB1176 platform. 568 569 config DEBUG_RK29_UART0 570 bool "Kernel low-level debugging messages via Rockchip RK29 UART0" 571 depends on ARCH_ROCKCHIP 572 select DEBUG_UART_8250 573 help 574 Say Y here if you want kernel low-level debugging support 575 on Rockchip based platforms. 576 577 config DEBUG_RK29_UART1 578 bool "Kernel low-level debugging messages via Rockchip RK29 UART1" 579 depends on ARCH_ROCKCHIP 580 select DEBUG_UART_8250 581 help 582 Say Y here if you want kernel low-level debugging support 583 on Rockchip based platforms. 584 585 config DEBUG_RK29_UART2 586 bool "Kernel low-level debugging messages via Rockchip RK29 UART2" 587 depends on ARCH_ROCKCHIP 588 select DEBUG_UART_8250 589 help 590 Say Y here if you want kernel low-level debugging support 591 on Rockchip based platforms. 592 593 config DEBUG_RK3X_UART0 594 bool "Kernel low-level debugging messages via Rockchip RK3X UART0" 595 depends on ARCH_ROCKCHIP 596 select DEBUG_UART_8250 597 help 598 Say Y here if you want kernel low-level debugging support 599 on Rockchip based platforms. 600 601 config DEBUG_RK3X_UART1 602 bool "Kernel low-level debugging messages via Rockchip RK3X UART1" 603 depends on ARCH_ROCKCHIP 604 select DEBUG_UART_8250 605 help 606 Say Y here if you want kernel low-level debugging support 607 on Rockchip based platforms. 608 609 config DEBUG_RK3X_UART2 610 bool "Kernel low-level debugging messages via Rockchip RK3X UART2" 611 depends on ARCH_ROCKCHIP 612 select DEBUG_UART_8250 613 help 614 Say Y here if you want kernel low-level debugging support 615 on Rockchip based platforms. 616 617 config DEBUG_RK3X_UART3 618 bool "Kernel low-level debugging messages via Rockchip RK3X UART3" 619 depends on ARCH_ROCKCHIP 620 select DEBUG_UART_8250 621 help 622 Say Y here if you want kernel low-level debugging support 623 on Rockchip based platforms. 624 625 config DEBUG_S3C_UART0 626 depends on PLAT_SAMSUNG 627 select DEBUG_EXYNOS_UART if ARCH_EXYNOS 628 bool "Use S3C UART 0 for low-level debug" 629 help 630 Say Y here if you want the debug print routines to direct 631 their output to UART 0. The port must have been initialised 632 by the boot-loader before use. 633 634 The uncompressor code port configuration is now handled 635 by CONFIG_S3C_LOWLEVEL_UART_PORT. 636 637 config DEBUG_S3C_UART1 638 depends on PLAT_SAMSUNG 639 select DEBUG_EXYNOS_UART if ARCH_EXYNOS 640 bool "Use S3C UART 1 for low-level debug" 641 help 642 Say Y here if you want the debug print routines to direct 643 their output to UART 1. The port must have been initialised 644 by the boot-loader before use. 645 646 The uncompressor code port configuration is now handled 647 by CONFIG_S3C_LOWLEVEL_UART_PORT. 648 649 config DEBUG_S3C_UART2 650 depends on PLAT_SAMSUNG 651 select DEBUG_EXYNOS_UART if ARCH_EXYNOS 652 bool "Use S3C UART 2 for low-level debug" 653 help 654 Say Y here if you want the debug print routines to direct 655 their output to UART 2. The port must have been initialised 656 by the boot-loader before use. 657 658 The uncompressor code port configuration is now handled 659 by CONFIG_S3C_LOWLEVEL_UART_PORT. 660 661 config DEBUG_S3C_UART3 662 depends on PLAT_SAMSUNG && ARCH_EXYNOS 663 select DEBUG_EXYNOS_UART 664 bool "Use S3C UART 3 for low-level debug" 665 help 666 Say Y here if you want the debug print routines to direct 667 their output to UART 3. The port must have been initialised 668 by the boot-loader before use. 669 670 The uncompressor code port configuration is now handled 671 by CONFIG_S3C_LOWLEVEL_UART_PORT. 672 673 config DEBUG_SOCFPGA_UART 674 depends on ARCH_SOCFPGA 675 bool "Use SOCFPGA UART for low-level debug" 676 select DEBUG_UART_8250 677 help 678 Say Y here if you want kernel low-level debugging support 679 on SOCFPGA based platforms. 680 681 config DEBUG_SUNXI_UART0 682 bool "Kernel low-level debugging messages via sunXi UART0" 683 depends on ARCH_SUNXI 684 select DEBUG_UART_8250 685 help 686 Say Y here if you want kernel low-level debugging support 687 on Allwinner A1X based platforms on the UART0. 688 689 config DEBUG_SUNXI_UART1 690 bool "Kernel low-level debugging messages via sunXi UART1" 691 depends on ARCH_SUNXI 692 select DEBUG_UART_8250 693 help 694 Say Y here if you want kernel low-level debugging support 695 on Allwinner A1X based platforms on the UART1. 696 697 config TEGRA_DEBUG_UART_AUTO_ODMDATA 698 bool "Kernel low-level debugging messages via Tegra UART via ODMDATA" 699 depends on ARCH_TEGRA 700 select DEBUG_TEGRA_UART 701 help 702 Automatically determines which UART to use for low-level 703 debug based on the ODMDATA value. This value is part of 704 the BCT, and is written to the boot memory device using 705 nvflash, or other flashing tool. When bits 19:18 are 3, 706 then bits 17:15 indicate which UART to use; 0/1/2/3/4 707 are UART A/B/C/D/E. 708 709 config TEGRA_DEBUG_UARTA 710 bool "Kernel low-level debugging messages via Tegra UART A" 711 depends on ARCH_TEGRA 712 select DEBUG_TEGRA_UART 713 help 714 Say Y here if you want kernel low-level debugging support 715 on Tegra based platforms. 716 717 config TEGRA_DEBUG_UARTB 718 bool "Kernel low-level debugging messages via Tegra UART B" 719 depends on ARCH_TEGRA 720 select DEBUG_TEGRA_UART 721 help 722 Say Y here if you want kernel low-level debugging support 723 on Tegra based platforms. 724 725 config TEGRA_DEBUG_UARTC 726 bool "Kernel low-level debugging messages via Tegra UART C" 727 depends on ARCH_TEGRA 728 select DEBUG_TEGRA_UART 729 help 730 Say Y here if you want kernel low-level debugging support 731 on Tegra based platforms. 732 733 config TEGRA_DEBUG_UARTD 734 bool "Kernel low-level debugging messages via Tegra UART D" 735 depends on ARCH_TEGRA 736 select DEBUG_TEGRA_UART 737 help 738 Say Y here if you want kernel low-level debugging support 739 on Tegra based platforms. 740 741 config TEGRA_DEBUG_UARTE 742 bool "Kernel low-level debugging messages via Tegra UART E" 743 depends on ARCH_TEGRA 744 select DEBUG_TEGRA_UART 745 help 746 Say Y here if you want kernel low-level debugging support 747 on Tegra based platforms. 748 749 config DEBUG_SIRFPRIMA2_UART1 750 bool "Kernel low-level debugging messages via SiRFprimaII UART1" 751 depends on ARCH_PRIMA2 752 help 753 Say Y here if you want the debug print routines to direct 754 their output to the uart1 port on SiRFprimaII devices. 755 756 config DEBUG_SIRFMARCO_UART1 757 bool "Kernel low-level debugging messages via SiRFmarco UART1" 758 depends on ARCH_MARCO 759 help 760 Say Y here if you want the debug print routines to direct 761 their output to the uart1 port on SiRFmarco devices. 762 763 config STIH41X_DEBUG_ASC2 764 bool "Use StiH415/416 ASC2 UART for low-level debug" 765 depends on ARCH_STI 766 select DEBUG_STI_UART 767 help 768 Say Y here if you want kernel low-level debugging support 769 on STiH415/416 based platforms like b2000, which has 770 default UART wired up to ASC2. 771 772 If unsure, say N. 773 774 config STIH41X_DEBUG_SBC_ASC1 775 bool "Use StiH415/416 SBC ASC1 UART for low-level debug" 776 depends on ARCH_STI 777 select DEBUG_STI_UART 778 help 779 Say Y here if you want kernel low-level debugging support 780 on STiH415/416 based platforms like b2020. which has 781 default UART wired up to SBC ASC1. 782 783 If unsure, say N. 784 785 config DEBUG_U300_UART 786 bool "Kernel low-level debugging messages via U300 UART0" 787 depends on ARCH_U300 788 select DEBUG_UART_PL01X 789 help 790 Say Y here if you want the debug print routines to direct 791 their output to the uart port on U300 devices. 792 793 config DEBUG_UX500_UART 794 depends on ARCH_U8500 795 bool "Use Ux500 UART for low-level debug" 796 help 797 Say Y here if you want kernel low-level debugging support 798 on Ux500 based platforms. 799 800 config DEBUG_VEXPRESS_UART0_DETECT 801 bool "Autodetect UART0 on Versatile Express Cortex-A core tiles" 802 depends on ARCH_VEXPRESS && CPU_CP15_MMU 803 help 804 This option enables a simple heuristic which tries to determine 805 the motherboard's memory map variant (original or RS1) and then 806 choose the relevant UART0 base address. 807 808 Note that this will only work with standard A-class core tiles, 809 and may fail with non-standard SMM or custom software models. 810 811 config DEBUG_VEXPRESS_UART0_CA9 812 bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)" 813 depends on ARCH_VEXPRESS 814 select DEBUG_UART_PL01X 815 help 816 This option selects UART0 at 0x10009000. Except for custom models, 817 this applies only to the V2P-CA9 tile. 818 819 config DEBUG_VEXPRESS_UART0_RS1 820 bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)" 821 depends on ARCH_VEXPRESS 822 select DEBUG_UART_PL01X 823 help 824 This option selects UART0 at 0x1c090000. This applies to most 825 of the tiles using the RS1 memory map, including all new A-class 826 core tiles, FPGA-based SMMs and software models. 827 828 config DEBUG_VEXPRESS_UART0_CRX 829 bool "Use PL011 UART0 at 0xb0090000 (Cortex-R compliant tiles)" 830 depends on ARCH_VEXPRESS && !MMU 831 select DEBUG_UART_PL01X 832 help 833 This option selects UART0 at 0xb0090000. This is appropriate for 834 Cortex-R series tiles and SMMs, such as Cortex-R5 and Cortex-R7 835 836 config DEBUG_VT8500_UART0 837 bool "Use UART0 on VIA/Wondermedia SoCs" 838 depends on ARCH_VT8500 839 help 840 This option selects UART0 on VIA/Wondermedia System-on-a-chip 841 devices, including VT8500, WM8505, WM8650 and WM8850. 842 843 config DEBUG_LL_UART_NONE 844 bool "No low-level debugging UART" 845 depends on !ARCH_MULTIPLATFORM 846 help 847 Say Y here if your platform doesn't provide a UART option 848 above. This relies on your platform choosing the right UART 849 definition internally in order for low-level debugging to 850 work. 851 852 config DEBUG_ICEDCC 853 bool "Kernel low-level debugging via EmbeddedICE DCC channel" 854 help 855 Say Y here if you want the debug print routines to direct 856 their output to the EmbeddedICE macrocell's DCC channel using 857 co-processor 14. This is known to work on the ARM9 style ICE 858 channel and on the XScale with the PEEDI. 859 860 Note that the system will appear to hang during boot if there 861 is nothing connected to read from the DCC. 862 863 config DEBUG_SEMIHOSTING 864 bool "Kernel low-level debug output via semihosting I/O" 865 help 866 Semihosting enables code running on an ARM target to use 867 the I/O facilities on a host debugger/emulator through a 868 simple SVC call. The host debugger or emulator must have 869 semihosting enabled for the special svc call to be trapped 870 otherwise the kernel will crash. 871 872 This is known to work with OpenOCD, as well as 873 ARM's Fast Models, or any other controlling environment 874 that implements semihosting. 875 876 For more details about semihosting, please see 877 chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd. 878 879 config DEBUG_LL_UART_8250 880 bool "Kernel low-level debugging via 8250 UART" 881 help 882 Say Y here if you wish the debug print routes to direct 883 their output to an 8250 UART. You can use this option 884 to provide the parameters for the 8250 UART rather than 885 selecting one of the platform specific options above if 886 you know the parameters for the port. 887 888 This option is preferred over the platform specific 889 options; the platform specific options are deprecated 890 and will be soon removed. 891 892 config DEBUG_LL_UART_EFM32 893 bool "Kernel low-level debugging via efm32 UART" 894 depends on ARCH_EFM32 895 help 896 Say Y here if you want the debug print routines to direct 897 their output to an UART or USART port on efm32 based 898 machines. Use the following addresses for DEBUG_UART_PHYS: 899 900 0x4000c000 | USART0 901 0x4000c400 | USART1 902 0x4000c800 | USART2 903 0x4000e000 | UART0 904 0x4000e400 | UART1 905 906 config DEBUG_LL_UART_PL01X 907 bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART" 908 help 909 Say Y here if you wish the debug print routes to direct 910 their output to a PL01x Primecell UART. You can use 911 this option to provide the parameters for the UART 912 rather than selecting one of the platform specific 913 options above if you know the parameters for the port. 914 915 This option is preferred over the platform specific 916 options; the platform specific options are deprecated 917 and will be soon removed. 918 919endchoice 920 921config DEBUG_EXYNOS_UART 922 bool 923 924config DEBUG_OMAP2PLUS_UART 925 bool 926 depends on ARCH_OMAP2PLUS 927 928config DEBUG_IMX_UART_PORT 929 int "i.MX Debug UART Port Selection" if DEBUG_IMX1_UART || \ 930 DEBUG_IMX25_UART || \ 931 DEBUG_IMX21_IMX27_UART || \ 932 DEBUG_IMX31_UART || \ 933 DEBUG_IMX35_UART || \ 934 DEBUG_IMX50_UART || \ 935 DEBUG_IMX51_UART || \ 936 DEBUG_IMX53_UART || \ 937 DEBUG_IMX6Q_UART || \ 938 DEBUG_IMX6SL_UART 939 default 1 940 depends on ARCH_MXC 941 help 942 Choose UART port on which kernel low-level debug messages 943 should be output. 944 945config DEBUG_TEGRA_UART 946 bool 947 depends on ARCH_TEGRA 948 949config DEBUG_STI_UART 950 bool 951 depends on ARCH_STI 952 953config DEBUG_MSM_UART 954 bool 955 depends on ARCH_MSM || ARCH_QCOM 956 957config DEBUG_LL_INCLUDE 958 string 959 default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250 960 default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X 961 default "debug/exynos.S" if DEBUG_EXYNOS_UART 962 default "debug/efm32.S" if DEBUG_LL_UART_EFM32 963 default "debug/icedcc.S" if DEBUG_ICEDCC 964 default "debug/imx.S" if DEBUG_IMX1_UART || \ 965 DEBUG_IMX25_UART || \ 966 DEBUG_IMX21_IMX27_UART || \ 967 DEBUG_IMX31_UART || \ 968 DEBUG_IMX35_UART || \ 969 DEBUG_IMX50_UART || \ 970 DEBUG_IMX51_UART || \ 971 DEBUG_IMX53_UART ||\ 972 DEBUG_IMX6Q_UART || \ 973 DEBUG_IMX6SL_UART 974 default "debug/msm.S" if DEBUG_MSM_UART 975 default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART 976 default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1 977 default "debug/sti.S" if DEBUG_STI_UART 978 default "debug/tegra.S" if DEBUG_TEGRA_UART 979 default "debug/ux500.S" if DEBUG_UX500_UART 980 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT 981 default "debug/vf.S" if DEBUG_VF_UART 982 default "debug/vt8500.S" if DEBUG_VT8500_UART0 983 default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1 984 default "mach/debug-macro.S" 985 986# Compatibility options for PL01x 987config DEBUG_UART_PL01X 988 def_bool ARCH_EP93XX || \ 989 ARCH_INTEGRATOR || \ 990 ARCH_SPEAR3XX || \ 991 ARCH_SPEAR6XX || \ 992 ARCH_SPEAR13XX || \ 993 ARCH_VERSATILE 994 995# Compatibility options for 8250 996config DEBUG_UART_8250 997 def_bool ARCH_DOVE || ARCH_EBSA110 || \ 998 (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \ 999 ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \ 1000 ARCH_IOP33X || ARCH_IXP4XX || ARCH_KIRKWOOD || \ 1001 ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC 1002 1003config DEBUG_UART_PHYS 1004 hex "Physical base address of debug UART" 1005 default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0 1006 default 0x01c28000 if DEBUG_SUNXI_UART0 1007 default 0x01c28400 if DEBUG_SUNXI_UART1 1008 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1 1009 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2 1010 default 0x02530c00 if DEBUG_KEYSTONE_UART0 1011 default 0x02531000 if DEBUG_KEYSTONE_UART1 1012 default 0x03010fe0 if ARCH_RPC 1013 default 0x10009000 if DEBUG_REALVIEW_STD_PORT || DEBUG_CNS3XXX || \ 1014 DEBUG_VEXPRESS_UART0_CA9 1015 default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT 1016 default 0x10124000 if DEBUG_RK3X_UART0 1017 default 0x10126000 if DEBUG_RK3X_UART1 1018 default 0x101f1000 if ARCH_VERSATILE 1019 default 0x101fb000 if DEBUG_NOMADIK_UART 1020 default 0x16000000 if ARCH_INTEGRATOR 1021 default 0x18000300 if DEBUG_BCM_5301X 1022 default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1 1023 default 0x20060000 if DEBUG_RK29_UART0 1024 default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2 1025 default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3 1026 default 0x20201000 if DEBUG_BCM2835 1027 default 0x3e000000 if DEBUG_BCM_KONA_UART 1028 default 0x4000e400 if DEBUG_LL_UART_EFM32 1029 default 0x40090000 if ARCH_LPC32XX 1030 default 0x40100000 if DEBUG_PXA_UART1 1031 default 0x42000000 if ARCH_GEMINI 1032 default 0x7c0003f8 if FOOTBRIDGE 1033 default 0x80230000 if DEBUG_PICOXCELL_UART 1034 default 0x80070000 if DEBUG_IMX23_UART 1035 default 0x80074000 if DEBUG_IMX28_UART 1036 default 0x808c0000 if ARCH_EP93XX 1037 default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART 1038 default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX 1039 default 0xc0013000 if DEBUG_U300_UART 1040 default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN 1041 default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN 1042 default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX 1043 default 0xd0012000 if DEBUG_MVEBU_UART 1044 default 0xd4017000 if DEBUG_MMP_UART2 1045 default 0xd4018000 if DEBUG_MMP_UART3 1046 default 0xe0000000 if ARCH_SPEAR13XX 1047 default 0xf0000be0 if ARCH_EBSA110 1048 default 0xf1012000 if DEBUG_MVEBU_UART_ALTERNATE 1049 default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \ 1050 ARCH_ORION5X 1051 default 0xf7fc9000 if DEBUG_BERLIN_UART 1052 default 0xf8b00000 if DEBUG_HI3716_UART 1053 default 0xfcb00000 if DEBUG_HI3620_UART 1054 default 0xfe800000 if ARCH_IOP32X 1055 default 0xffc02000 if DEBUG_SOCFPGA_UART 1056 default 0xffd82340 if ARCH_IOP13XX 1057 default 0xfff36000 if DEBUG_HIGHBANK_UART 1058 default 0xfffff700 if ARCH_IOP33X 1059 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \ 1060 DEBUG_LL_UART_EFM32 || \ 1061 DEBUG_UART_8250 || DEBUG_UART_PL01X 1062 1063config DEBUG_UART_VIRT 1064 hex "Virtual base address of debug UART" 1065 default 0xe0010fe0 if ARCH_RPC 1066 default 0xf0000be0 if ARCH_EBSA110 1067 default 0xf0009000 if DEBUG_CNS3XXX 1068 default 0xf01fb000 if DEBUG_NOMADIK_UART 1069 default 0xf0201000 if DEBUG_BCM2835 1070 default 0xf1000300 if DEBUG_BCM_5301X 1071 default 0xf11f1000 if ARCH_VERSATILE 1072 default 0xf1600000 if ARCH_INTEGRATOR 1073 default 0xf1c28000 if DEBUG_SUNXI_UART0 1074 default 0xf1c28400 if DEBUG_SUNXI_UART1 1075 default 0xf2100000 if DEBUG_PXA_UART1 1076 default 0xf4090000 if ARCH_LPC32XX 1077 default 0xf4200000 if ARCH_GEMINI 1078 default 0xf7fc9000 if DEBUG_BERLIN_UART 1079 default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9 1080 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1 1081 default 0xfb009000 if DEBUG_REALVIEW_STD_PORT 1082 default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT 1083 default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX 1084 default 0xfd000000 if ARCH_SPEAR13XX 1085 default 0xfd012000 if ARCH_MV78XX0 1086 default 0xfde12000 if ARCH_DOVE 1087 default 0xfe012000 if ARCH_ORION5X 1088 default 0xfe017000 if DEBUG_MMP_UART2 1089 default 0xfe018000 if DEBUG_MMP_UART3 1090 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART 1091 default 0xfe230000 if DEBUG_PICOXCELL_UART 1092 default 0xfe300000 if DEBUG_BCM_KONA_UART 1093 default 0xfe800000 if ARCH_IOP32X 1094 default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HI3716_UART 1095 default 0xfeb24000 if DEBUG_RK3X_UART0 1096 default 0xfeb26000 if DEBUG_RK3X_UART1 1097 default 0xfeb30c00 if DEBUG_KEYSTONE_UART0 1098 default 0xfeb31000 if DEBUG_KEYSTONE_UART1 1099 default 0xfec12000 if DEBUG_MVEBU_UART || DEBUG_MVEBU_UART_ALTERNATE 1100 default 0xfed60000 if DEBUG_RK29_UART0 1101 default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2 1102 default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3 1103 default 0xfec02000 if DEBUG_SOCFPGA_UART 1104 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0 1105 default 0xfed0c000 if DEBUG_DAVINCI_DA8XX_UART1 1106 default 0xfed0d000 if DEBUG_DAVINCI_DA8XX_UART2 1107 default 0xfed12000 if ARCH_KIRKWOOD 1108 default 0xfedc0000 if ARCH_EP93XX 1109 default 0xfee003f8 if FOOTBRIDGE 1110 default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART 1111 default 0xfef36000 if DEBUG_HIGHBANK_UART 1112 default 0xfee82340 if ARCH_IOP13XX 1113 default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN 1114 default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN 1115 default 0xfefff700 if ARCH_IOP33X 1116 default 0xff003000 if DEBUG_U300_UART 1117 default DEBUG_UART_PHYS if !MMU 1118 depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \ 1119 DEBUG_UART_8250 || DEBUG_UART_PL01X 1120 1121config DEBUG_UART_8250_SHIFT 1122 int "Register offset shift for the 8250 debug UART" 1123 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250 1124 default 0 if FOOTBRIDGE || ARCH_IOP32X 1125 default 2 1126 1127config DEBUG_UART_8250_WORD 1128 bool "Use 32-bit accesses for 8250 UART" 1129 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250 1130 depends on DEBUG_UART_8250_SHIFT >= 2 1131 default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \ 1132 ARCH_KEYSTONE || \ 1133 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \ 1134 DEBUG_DAVINCI_DA8XX_UART2 || \ 1135 DEBUG_BCM_KONA_UART 1136 1137config DEBUG_UART_8250_FLOW_CONTROL 1138 bool "Enable flow control for 8250 UART" 1139 depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250 1140 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_GEMINI || ARCH_RPC 1141 1142config DEBUG_UNCOMPRESS 1143 bool 1144 depends on ARCH_MULTIPLATFORM || ARCH_MSM || PLAT_SAMSUNG 1145 default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \ 1146 (!DEBUG_TEGRA_UART || !ZBOOT_ROM) 1147 help 1148 This option influences the normal decompressor output for 1149 multiplatform kernels. Normally, multiplatform kernels disable 1150 decompressor output because it is not possible to know where to 1151 send the decompressor output. 1152 1153 When this option is set, the selected DEBUG_LL output method 1154 will be re-used for normal decompressor output on multiplatform 1155 kernels. 1156 1157 1158config UNCOMPRESS_INCLUDE 1159 string 1160 default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM || \ 1161 PLAT_SAMSUNG || ARCH_EFM32 1162 default "mach/uncompress.h" 1163 1164config EARLY_PRINTK 1165 bool "Early printk" 1166 depends on DEBUG_LL 1167 help 1168 Say Y here if you want to have an early console using the 1169 kernel low-level debugging functions. Add earlyprintk to your 1170 kernel parameters to enable this console. 1171 1172config OC_ETM 1173 bool "On-chip ETM and ETB" 1174 depends on ARM_AMBA 1175 help 1176 Enables the on-chip embedded trace macrocell and embedded trace 1177 buffer driver that will allow you to collect traces of the 1178 kernel code. 1179 1180config ARM_KPROBES_TEST 1181 tristate "Kprobes test module" 1182 depends on KPROBES && MODULES 1183 help 1184 Perform tests of kprobes API and instruction set simulation. 1185 1186config PID_IN_CONTEXTIDR 1187 bool "Write the current PID to the CONTEXTIDR register" 1188 depends on CPU_COPY_V6 1189 help 1190 Enabling this option causes the kernel to write the current PID to 1191 the PROCID field of the CONTEXTIDR register, at the expense of some 1192 additional instructions during context switch. Say Y here only if you 1193 are planning to use hardware trace tools with this kernel. 1194 1195config DEBUG_SET_MODULE_RONX 1196 bool "Set loadable kernel module data as NX and text as RO" 1197 depends on MODULES 1198 ---help--- 1199 This option helps catch unintended modifications to loadable 1200 kernel module's text and read-only data. It also prevents execution 1201 of module data. Such protection may interfere with run-time code 1202 patching and dynamic kernel tracing - and they might also protect 1203 against certain classes of kernel exploits. 1204 If in doubt, say "N". 1205 1206endmenu 1207