1# 2# For a description of the syntax of this configuration file, 3# see Documentation/kbuild/kconfig-language.txt. 4# 5 6mainmenu "Linux Kernel Configuration" 7 8config ARM 9 bool 10 default y 11 select HAVE_AOUT 12 select HAVE_IDE 13 select RTC_LIB 14 select SYS_SUPPORTS_APM_EMULATION 15 select HAVE_OPROFILE 16 select HAVE_ARCH_KGDB 17 select HAVE_KPROBES if (!XIP_KERNEL) 18 select HAVE_KRETPROBES if (HAVE_KPROBES) 19 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL) 20 select HAVE_GENERIC_DMA_COHERENT 21 help 22 The ARM series is a line of low-power-consumption RISC chip designs 23 licensed by ARM Ltd and targeted at embedded applications and 24 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer 25 manufactured, but legacy ARM-based PC hardware remains popular in 26 Europe. There is an ARM Linux project with a web page at 27 <http://www.arm.linux.org.uk/>. 28 29config HAVE_PWM 30 bool 31 32config SYS_SUPPORTS_APM_EMULATION 33 bool 34 35config GENERIC_GPIO 36 bool 37 default n 38 39config GENERIC_TIME 40 bool 41 default n 42 43config GENERIC_CLOCKEVENTS 44 bool 45 default n 46 47config GENERIC_CLOCKEVENTS_BROADCAST 48 bool 49 depends on GENERIC_CLOCKEVENTS 50 default y if SMP && !LOCAL_TIMERS 51 52config MMU 53 bool 54 default y 55 56config NO_IOPORT 57 bool 58 default n 59 60config EISA 61 bool 62 ---help--- 63 The Extended Industry Standard Architecture (EISA) bus was 64 developed as an open alternative to the IBM MicroChannel bus. 65 66 The EISA bus provided some of the features of the IBM MicroChannel 67 bus while maintaining backward compatibility with cards made for 68 the older ISA bus. The EISA bus saw limited use between 1988 and 69 1995 when it was made obsolete by the PCI bus. 70 71 Say Y here if you are building a kernel for an EISA-based machine. 72 73 Otherwise, say N. 74 75config SBUS 76 bool 77 78config MCA 79 bool 80 help 81 MicroChannel Architecture is found in some IBM PS/2 machines and 82 laptops. It is a bus system similar to PCI or ISA. See 83 <file:Documentation/mca.txt> (and especially the web page given 84 there) before attempting to build an MCA bus kernel. 85 86config GENERIC_HARDIRQS 87 bool 88 default y 89 90config STACKTRACE_SUPPORT 91 bool 92 default y 93 94config HAVE_LATENCYTOP_SUPPORT 95 bool 96 depends on !SMP 97 default y 98 99config LOCKDEP_SUPPORT 100 bool 101 default y 102 103config TRACE_IRQFLAGS_SUPPORT 104 bool 105 default y 106 107config HARDIRQS_SW_RESEND 108 bool 109 default y 110 111config GENERIC_IRQ_PROBE 112 bool 113 default y 114 115config GENERIC_LOCKBREAK 116 bool 117 default y 118 depends on SMP && PREEMPT 119 120config RWSEM_GENERIC_SPINLOCK 121 bool 122 default y 123 124config RWSEM_XCHGADD_ALGORITHM 125 bool 126 127config ARCH_HAS_ILOG2_U32 128 bool 129 default n 130 131config ARCH_HAS_ILOG2_U64 132 bool 133 default n 134 135config GENERIC_HWEIGHT 136 bool 137 default y 138 139config GENERIC_CALIBRATE_DELAY 140 bool 141 default y 142 143config ARCH_MAY_HAVE_PC_FDC 144 bool 145 146config ZONE_DMA 147 bool 148 149config GENERIC_ISA_DMA 150 bool 151 152config FIQ 153 bool 154 155config ARCH_MTD_XIP 156 bool 157 158config GENERIC_HARDIRQS_NO__DO_IRQ 159 def_bool y 160 161if OPROFILE 162 163config OPROFILE_ARMV6 164 def_bool y 165 depends on CPU_V6 && !SMP 166 select OPROFILE_ARM11_CORE 167 168config OPROFILE_MPCORE 169 def_bool y 170 depends on CPU_V6 && SMP 171 select OPROFILE_ARM11_CORE 172 173config OPROFILE_ARM11_CORE 174 bool 175 176config OPROFILE_ARMV7 177 def_bool y 178 depends on CPU_V7 && !SMP 179 bool 180 181endif 182 183config VECTORS_BASE 184 hex 185 default 0xffff0000 if MMU || CPU_HIGH_VECTOR 186 default DRAM_BASE if REMAP_VECTORS_TO_RAM 187 default 0x00000000 188 help 189 The base address of exception vectors. 190 191source "init/Kconfig" 192 193source "kernel/Kconfig.freezer" 194 195menu "System Type" 196 197choice 198 prompt "ARM system type" 199 default ARCH_VERSATILE 200 201config ARCH_AAEC2000 202 bool "Agilent AAEC-2000 based" 203 select CPU_ARM920T 204 select ARM_AMBA 205 select HAVE_CLK 206 help 207 This enables support for systems based on the Agilent AAEC-2000 208 209config ARCH_INTEGRATOR 210 bool "ARM Ltd. Integrator family" 211 select ARM_AMBA 212 select HAVE_CLK 213 select COMMON_CLKDEV 214 select ICST525 215 help 216 Support for ARM's Integrator platform. 217 218config ARCH_REALVIEW 219 bool "ARM Ltd. RealView family" 220 select ARM_AMBA 221 select HAVE_CLK 222 select COMMON_CLKDEV 223 select ICST307 224 select GENERIC_TIME 225 select GENERIC_CLOCKEVENTS 226 help 227 This enables support for ARM Ltd RealView boards. 228 229config ARCH_VERSATILE 230 bool "ARM Ltd. Versatile family" 231 select ARM_AMBA 232 select ARM_VIC 233 select HAVE_CLK 234 select COMMON_CLKDEV 235 select ICST307 236 select GENERIC_TIME 237 select GENERIC_CLOCKEVENTS 238 help 239 This enables support for ARM Ltd Versatile board. 240 241config ARCH_AT91 242 bool "Atmel AT91" 243 select GENERIC_GPIO 244 select ARCH_REQUIRE_GPIOLIB 245 select HAVE_CLK 246 help 247 This enables support for systems based on the Atmel AT91RM9200, 248 AT91SAM9 and AT91CAP9 processors. 249 250config ARCH_CLPS711X 251 bool "Cirrus Logic CLPS711x/EP721x-based" 252 select CPU_ARM720T 253 help 254 Support for Cirrus Logic 711x/721x based boards. 255 256config ARCH_EBSA110 257 bool "EBSA-110" 258 select CPU_SA110 259 select ISA 260 select NO_IOPORT 261 help 262 This is an evaluation board for the StrongARM processor available 263 from Digital. It has limited hardware on-board, including an 264 Ethernet interface, two PCMCIA sockets, two serial ports and a 265 parallel port. 266 267config ARCH_EP93XX 268 bool "EP93xx-based" 269 select CPU_ARM920T 270 select ARM_AMBA 271 select ARM_VIC 272 select GENERIC_GPIO 273 select HAVE_CLK 274 select COMMON_CLKDEV 275 select ARCH_REQUIRE_GPIOLIB 276 select ARCH_HAS_HOLES_MEMORYMODEL 277 help 278 This enables support for the Cirrus EP93xx series of CPUs. 279 280config ARCH_GEMINI 281 bool "Cortina Systems Gemini" 282 select CPU_FA526 283 select GENERIC_GPIO 284 select ARCH_REQUIRE_GPIOLIB 285 help 286 Support for the Cortina Systems Gemini family SoCs 287 288config ARCH_FOOTBRIDGE 289 bool "FootBridge" 290 select CPU_SA110 291 select FOOTBRIDGE 292 help 293 Support for systems based on the DC21285 companion chip 294 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. 295 296config ARCH_NETX 297 bool "Hilscher NetX based" 298 select CPU_ARM926T 299 select ARM_VIC 300 select GENERIC_CLOCKEVENTS 301 select GENERIC_TIME 302 help 303 This enables support for systems based on the Hilscher NetX Soc 304 305config ARCH_H720X 306 bool "Hynix HMS720x-based" 307 select CPU_ARM720T 308 select ISA_DMA_API 309 help 310 This enables support for systems based on the Hynix HMS720x 311 312config ARCH_IMX 313 bool "IMX" 314 select CPU_ARM920T 315 select GENERIC_GPIO 316 select GENERIC_TIME 317 select GENERIC_CLOCKEVENTS 318 help 319 Support for Motorola's i.MX family of processors (MX1, MXL). 320 321config ARCH_IOP13XX 322 bool "IOP13xx-based" 323 depends on MMU 324 select CPU_XSC3 325 select PLAT_IOP 326 select PCI 327 select ARCH_SUPPORTS_MSI 328 select VMSPLIT_1G 329 help 330 Support for Intel's IOP13XX (XScale) family of processors. 331 332config ARCH_IOP32X 333 bool "IOP32x-based" 334 depends on MMU 335 select CPU_XSCALE 336 select PLAT_IOP 337 select PCI 338 select GENERIC_GPIO 339 select ARCH_REQUIRE_GPIOLIB 340 help 341 Support for Intel's 80219 and IOP32X (XScale) family of 342 processors. 343 344config ARCH_IOP33X 345 bool "IOP33x-based" 346 depends on MMU 347 select CPU_XSCALE 348 select PLAT_IOP 349 select PCI 350 select GENERIC_GPIO 351 select ARCH_REQUIRE_GPIOLIB 352 help 353 Support for Intel's IOP33X (XScale) family of processors. 354 355config ARCH_IXP23XX 356 bool "IXP23XX-based" 357 depends on MMU 358 select CPU_XSC3 359 select PCI 360 help 361 Support for Intel's IXP23xx (XScale) family of processors. 362 363config ARCH_IXP2000 364 bool "IXP2400/2800-based" 365 depends on MMU 366 select CPU_XSCALE 367 select PCI 368 help 369 Support for Intel's IXP2400/2800 (XScale) family of processors. 370 371config ARCH_IXP4XX 372 bool "IXP4xx-based" 373 depends on MMU 374 select CPU_XSCALE 375 select GENERIC_GPIO 376 select GENERIC_TIME 377 select GENERIC_CLOCKEVENTS 378 select DMABOUNCE if PCI 379 help 380 Support for Intel's IXP4XX (XScale) family of processors. 381 382config ARCH_L7200 383 bool "LinkUp-L7200" 384 select CPU_ARM720T 385 select FIQ 386 help 387 Say Y here if you intend to run this kernel on a LinkUp Systems 388 L7200 Software Development Board which uses an ARM720T processor. 389 Information on this board can be obtained at: 390 391 <http://www.linkupsys.com/> 392 393 If you have any questions or comments about the Linux kernel port 394 to this board, send e-mail to <sjhill@cotw.com>. 395 396config ARCH_KIRKWOOD 397 bool "Marvell Kirkwood" 398 select CPU_FEROCEON 399 select PCI 400 select GENERIC_GPIO 401 select GENERIC_TIME 402 select GENERIC_CLOCKEVENTS 403 select PLAT_ORION 404 help 405 Support for the following Marvell Kirkwood series SoCs: 406 88F6180, 88F6192 and 88F6281. 407 408config ARCH_KS8695 409 bool "Micrel/Kendin KS8695" 410 select CPU_ARM922T 411 select GENERIC_GPIO 412 select ARCH_REQUIRE_GPIOLIB 413 help 414 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based 415 System-on-Chip devices. 416 417config ARCH_NS9XXX 418 bool "NetSilicon NS9xxx" 419 select CPU_ARM926T 420 select GENERIC_GPIO 421 select GENERIC_TIME 422 select GENERIC_CLOCKEVENTS 423 select HAVE_CLK 424 help 425 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx 426 System. 427 428 <http://www.digi.com/products/microprocessors/index.jsp> 429 430config ARCH_LOKI 431 bool "Marvell Loki (88RC8480)" 432 select CPU_FEROCEON 433 select GENERIC_TIME 434 select GENERIC_CLOCKEVENTS 435 select PLAT_ORION 436 help 437 Support for the Marvell Loki (88RC8480) SoC. 438 439config ARCH_MV78XX0 440 bool "Marvell MV78xx0" 441 select CPU_FEROCEON 442 select PCI 443 select GENERIC_GPIO 444 select GENERIC_TIME 445 select GENERIC_CLOCKEVENTS 446 select PLAT_ORION 447 help 448 Support for the following Marvell MV78xx0 series SoCs: 449 MV781x0, MV782x0. 450 451config ARCH_MXC 452 bool "Freescale MXC/iMX-based" 453 select GENERIC_TIME 454 select GENERIC_CLOCKEVENTS 455 select ARCH_MTD_XIP 456 select GENERIC_GPIO 457 select ARCH_REQUIRE_GPIOLIB 458 select HAVE_CLK 459 help 460 Support for Freescale MXC/iMX-based family of processors 461 462config ARCH_ORION5X 463 bool "Marvell Orion" 464 depends on MMU 465 select CPU_FEROCEON 466 select PCI 467 select GENERIC_GPIO 468 select GENERIC_TIME 469 select GENERIC_CLOCKEVENTS 470 select PLAT_ORION 471 help 472 Support for the following Marvell Orion 5x series SoCs: 473 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182), 474 Orion-2 (5281), Orion-1-90 (6183). 475 476config ARCH_PNX4008 477 bool "Philips Nexperia PNX4008 Mobile" 478 select CPU_ARM926T 479 select HAVE_CLK 480 help 481 This enables support for Philips PNX4008 mobile platform. 482 483config ARCH_PXA 484 bool "PXA2xx/PXA3xx-based" 485 depends on MMU 486 select ARCH_MTD_XIP 487 select GENERIC_GPIO 488 select HAVE_CLK 489 select COMMON_CLKDEV 490 select ARCH_REQUIRE_GPIOLIB 491 select GENERIC_TIME 492 select GENERIC_CLOCKEVENTS 493 select TICK_ONESHOT 494 select PLAT_PXA 495 help 496 Support for Intel/Marvell's PXA2xx/PXA3xx processor line. 497 498config ARCH_MMP 499 bool "Marvell PXA168/910" 500 depends on MMU 501 select GENERIC_GPIO 502 select ARCH_REQUIRE_GPIOLIB 503 select HAVE_CLK 504 select COMMON_CLKDEV 505 select GENERIC_TIME 506 select GENERIC_CLOCKEVENTS 507 select TICK_ONESHOT 508 select PLAT_PXA 509 help 510 Support for Marvell's PXA168/910 processor line. 511 512config ARCH_RPC 513 bool "RiscPC" 514 select ARCH_ACORN 515 select FIQ 516 select TIMER_ACORN 517 select ARCH_MAY_HAVE_PC_FDC 518 select HAVE_PATA_PLATFORM 519 select ISA_DMA_API 520 select NO_IOPORT 521 select ARCH_SPARSEMEM_ENABLE 522 help 523 On the Acorn Risc-PC, Linux can support the internal IDE disk and 524 CD-ROM interface, serial and parallel port, and the floppy drive. 525 526config ARCH_SA1100 527 bool "SA1100-based" 528 select CPU_SA1100 529 select ISA 530 select ARCH_SPARSEMEM_ENABLE 531 select ARCH_MTD_XIP 532 select GENERIC_GPIO 533 select GENERIC_TIME 534 select GENERIC_CLOCKEVENTS 535 select HAVE_CLK 536 select TICK_ONESHOT 537 select ARCH_REQUIRE_GPIOLIB 538 help 539 Support for StrongARM 11x0 based boards. 540 541config ARCH_S3C2410 542 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443" 543 select GENERIC_GPIO 544 select HAVE_CLK 545 help 546 Samsung S3C2410X CPU based systems, such as the Simtec Electronics 547 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or 548 the Samsung SMDK2410 development board (and derivatives). 549 550config ARCH_S3C64XX 551 bool "Samsung S3C64XX" 552 select GENERIC_GPIO 553 select HAVE_CLK 554 help 555 Samsung S3C64XX series based systems 556 557config ARCH_SHARK 558 bool "Shark" 559 select CPU_SA110 560 select ISA 561 select ISA_DMA 562 select ZONE_DMA 563 select PCI 564 help 565 Support for the StrongARM based Digital DNARD machine, also known 566 as "Shark" (<http://www.shark-linux.de/shark.html>). 567 568config ARCH_LH7A40X 569 bool "Sharp LH7A40X" 570 select CPU_ARM922T 571 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM 572 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM 573 help 574 Say Y here for systems based on one of the Sharp LH7A40X 575 System on a Chip processors. These CPUs include an ARM922T 576 core with a wide array of integrated devices for 577 hand-held and low-power applications. 578 579config ARCH_DAVINCI 580 bool "TI DaVinci" 581 select CPU_ARM926T 582 select GENERIC_TIME 583 select GENERIC_CLOCKEVENTS 584 select GENERIC_GPIO 585 select ARCH_REQUIRE_GPIOLIB 586 select HAVE_CLK 587 select ZONE_DMA 588 select HAVE_IDE 589 select COMMON_CLKDEV 590 help 591 Support for TI's DaVinci platform. 592 593config ARCH_OMAP 594 bool "TI OMAP" 595 select GENERIC_GPIO 596 select HAVE_CLK 597 select ARCH_REQUIRE_GPIOLIB 598 select GENERIC_TIME 599 select GENERIC_CLOCKEVENTS 600 help 601 Support for TI's OMAP platform (OMAP1 and OMAP2). 602 603config ARCH_MSM 604 bool "Qualcomm MSM" 605 select CPU_V6 606 select GENERIC_TIME 607 select GENERIC_CLOCKEVENTS 608 help 609 Support for Qualcomm MSM7K based systems. This runs on the ARM11 610 apps processor of the MSM7K and depends on a shared memory 611 interface to the ARM9 modem processor which runs the baseband stack 612 and controls some vital subsystems (clock and power control, etc). 613 614config ARCH_W90X900 615 bool "Nuvoton W90X900 CPU" 616 select CPU_ARM926T 617 help 618 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You 619 can login www.mcuos.com or www.nuvoton.com to know more. 620 621endchoice 622 623source "arch/arm/mach-clps711x/Kconfig" 624 625source "arch/arm/mach-ep93xx/Kconfig" 626 627source "arch/arm/mach-footbridge/Kconfig" 628 629source "arch/arm/mach-gemini/Kconfig" 630 631source "arch/arm/mach-integrator/Kconfig" 632 633source "arch/arm/mach-iop32x/Kconfig" 634 635source "arch/arm/mach-iop33x/Kconfig" 636 637source "arch/arm/mach-iop13xx/Kconfig" 638 639source "arch/arm/mach-ixp4xx/Kconfig" 640 641source "arch/arm/mach-ixp2000/Kconfig" 642 643source "arch/arm/mach-ixp23xx/Kconfig" 644 645source "arch/arm/mach-loki/Kconfig" 646 647source "arch/arm/mach-mv78xx0/Kconfig" 648 649source "arch/arm/mach-pxa/Kconfig" 650source "arch/arm/plat-pxa/Kconfig" 651 652source "arch/arm/mach-mmp/Kconfig" 653 654source "arch/arm/mach-sa1100/Kconfig" 655 656source "arch/arm/plat-omap/Kconfig" 657 658source "arch/arm/mach-omap1/Kconfig" 659 660source "arch/arm/mach-omap2/Kconfig" 661 662source "arch/arm/mach-orion5x/Kconfig" 663 664source "arch/arm/mach-kirkwood/Kconfig" 665 666source "arch/arm/plat-s3c24xx/Kconfig" 667source "arch/arm/plat-s3c64xx/Kconfig" 668source "arch/arm/plat-s3c/Kconfig" 669 670if ARCH_S3C2410 671source "arch/arm/mach-s3c2400/Kconfig" 672source "arch/arm/mach-s3c2410/Kconfig" 673source "arch/arm/mach-s3c2412/Kconfig" 674source "arch/arm/mach-s3c2440/Kconfig" 675source "arch/arm/mach-s3c2442/Kconfig" 676source "arch/arm/mach-s3c2443/Kconfig" 677endif 678 679if ARCH_S3C64XX 680source "arch/arm/mach-s3c6400/Kconfig" 681source "arch/arm/mach-s3c6410/Kconfig" 682endif 683 684source "arch/arm/mach-lh7a40x/Kconfig" 685 686source "arch/arm/mach-imx/Kconfig" 687 688source "arch/arm/mach-h720x/Kconfig" 689 690source "arch/arm/mach-versatile/Kconfig" 691 692source "arch/arm/mach-aaec2000/Kconfig" 693 694source "arch/arm/mach-realview/Kconfig" 695 696source "arch/arm/mach-at91/Kconfig" 697 698source "arch/arm/plat-mxc/Kconfig" 699 700source "arch/arm/mach-netx/Kconfig" 701 702source "arch/arm/mach-ns9xxx/Kconfig" 703 704source "arch/arm/mach-davinci/Kconfig" 705 706source "arch/arm/mach-ks8695/Kconfig" 707 708source "arch/arm/mach-msm/Kconfig" 709 710source "arch/arm/mach-w90x900/Kconfig" 711 712# Definitions to make life easier 713config ARCH_ACORN 714 bool 715 716config PLAT_IOP 717 bool 718 719config PLAT_ORION 720 bool 721 722config PLAT_PXA 723 bool 724 725source arch/arm/mm/Kconfig 726 727config IWMMXT 728 bool "Enable iWMMXt support" 729 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK 730 default y if PXA27x || PXA3xx || ARCH_MMP 731 help 732 Enable support for iWMMXt context switching at run time if 733 running on a CPU that supports it. 734 735# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER 736config XSCALE_PMU 737 bool 738 depends on CPU_XSCALE && !XSCALE_PMU_TIMER 739 default y 740 741if !MMU 742source "arch/arm/Kconfig-nommu" 743endif 744 745config ARM_ERRATA_411920 746 bool "ARM errata: Invalidation of the Instruction Cache operation can fail" 747 depends on CPU_V6 && !SMP 748 help 749 Invalidation of the Instruction Cache operation can 750 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176. 751 It does not affect the MPCore. This option enables the ARM Ltd. 752 recommended workaround. 753 754config ARM_ERRATA_430973 755 bool "ARM errata: Stale prediction on replaced interworking branch" 756 depends on CPU_V7 757 help 758 This option enables the workaround for the 430973 Cortex-A8 759 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb 760 interworking branch is replaced with another code sequence at the 761 same virtual address, whether due to self-modifying code or virtual 762 to physical address re-mapping, Cortex-A8 does not recover from the 763 stale interworking branch prediction. This results in Cortex-A8 764 executing the new code sequence in the incorrect ARM or Thumb state. 765 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE 766 and also flushes the branch target cache at every context switch. 767 Note that setting specific bits in the ACTLR register may not be 768 available in non-secure mode. 769 770config ARM_ERRATA_458693 771 bool "ARM errata: Processor deadlock when a false hazard is created" 772 depends on CPU_V7 773 help 774 This option enables the workaround for the 458693 Cortex-A8 (r2p0) 775 erratum. For very specific sequences of memory operations, it is 776 possible for a hazard condition intended for a cache line to instead 777 be incorrectly associated with a different cache line. This false 778 hazard might then cause a processor deadlock. The workaround enables 779 the L1 caching of the NEON accesses and disables the PLD instruction 780 in the ACTLR register. Note that setting specific bits in the ACTLR 781 register may not be available in non-secure mode. 782 783config ARM_ERRATA_460075 784 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data" 785 depends on CPU_V7 786 help 787 This option enables the workaround for the 460075 Cortex-A8 (r2p0) 788 erratum. Any asynchronous access to the L2 cache may encounter a 789 situation in which recent store transactions to the L2 cache are lost 790 and overwritten with stale memory contents from external memory. The 791 workaround disables the write-allocate mode for the L2 cache via the 792 ACTLR register. Note that setting specific bits in the ACTLR register 793 may not be available in non-secure mode. 794 795endmenu 796 797source "arch/arm/common/Kconfig" 798 799config FORCE_MAX_ZONEORDER 800 int 801 depends on SA1111 802 default "9" 803 804menu "Bus support" 805 806config ARM_AMBA 807 bool 808 809config ISA 810 bool 811 help 812 Find out whether you have ISA slots on your motherboard. ISA is the 813 name of a bus system, i.e. the way the CPU talks to the other stuff 814 inside your box. Other bus systems are PCI, EISA, MicroChannel 815 (MCA) or VESA. ISA is an older system, now being displaced by PCI; 816 newer boards don't support it. If you have ISA, say Y, otherwise N. 817 818# Select ISA DMA controller support 819config ISA_DMA 820 bool 821 select ISA_DMA_API 822 823# Select ISA DMA interface 824config ISA_DMA_API 825 bool 826 827config PCI 828 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE 829 help 830 Find out whether you have a PCI motherboard. PCI is the name of a 831 bus system, i.e. the way the CPU talks to the other stuff inside 832 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or 833 VESA. If you have PCI, say Y, otherwise N. 834 835config PCI_SYSCALL 836 def_bool PCI 837 838# Select the host bridge type 839config PCI_HOST_VIA82C505 840 bool 841 depends on PCI && ARCH_SHARK 842 default y 843 844config PCI_HOST_ITE8152 845 bool 846 depends on PCI && MACH_ARMCORE 847 default y 848 select DMABOUNCE 849 850source "drivers/pci/Kconfig" 851 852source "drivers/pcmcia/Kconfig" 853 854endmenu 855 856menu "Kernel Features" 857 858source "kernel/time/Kconfig" 859 860config SMP 861 bool "Symmetric Multi-Processing (EXPERIMENTAL)" 862 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP) 863 select USE_GENERIC_SMP_HELPERS 864 help 865 This enables support for systems with more than one CPU. If you have 866 a system with only one CPU, like most personal computers, say N. If 867 you have a system with more than one CPU, say Y. 868 869 If you say N here, the kernel will run on single and multiprocessor 870 machines, but will use only one CPU of a multiprocessor machine. If 871 you say Y here, the kernel will run on many, but not all, single 872 processor machines. On a single processor machine, the kernel will 873 run faster if you say N here. 874 875 See also <file:Documentation/i386/IO-APIC.txt>, 876 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 877 <http://www.linuxdoc.org/docs.html#howto>. 878 879 If you don't know what to do here, say N. 880 881choice 882 prompt "Memory split" 883 default VMSPLIT_3G 884 help 885 Select the desired split between kernel and user memory. 886 887 If you are not absolutely sure what you are doing, leave this 888 option alone! 889 890 config VMSPLIT_3G 891 bool "3G/1G user/kernel split" 892 config VMSPLIT_2G 893 bool "2G/2G user/kernel split" 894 config VMSPLIT_1G 895 bool "1G/3G user/kernel split" 896endchoice 897 898config PAGE_OFFSET 899 hex 900 default 0x40000000 if VMSPLIT_1G 901 default 0x80000000 if VMSPLIT_2G 902 default 0xC0000000 903 904config NR_CPUS 905 int "Maximum number of CPUs (2-32)" 906 range 2 32 907 depends on SMP 908 default "4" 909 910config HOTPLUG_CPU 911 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 912 depends on SMP && HOTPLUG && EXPERIMENTAL 913 help 914 Say Y here to experiment with turning CPUs off and on. CPUs 915 can be controlled through /sys/devices/system/cpu. 916 917config LOCAL_TIMERS 918 bool "Use local timer interrupts" 919 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP) 920 default y 921 help 922 Enable support for local timers on SMP platforms, rather then the 923 legacy IPI broadcast method. Local timers allows the system 924 accounting to be spread across the timer interval, preventing a 925 "thundering herd" at every timer tick. 926 927config PREEMPT 928 bool "Preemptible Kernel (EXPERIMENTAL)" 929 depends on EXPERIMENTAL 930 help 931 This option reduces the latency of the kernel when reacting to 932 real-time or interactive events by allowing a low priority process to 933 be preempted even if it is in kernel mode executing a system call. 934 This allows applications to run more reliably even when the system is 935 under load. 936 937 Say Y here if you are building a kernel for a desktop, embedded 938 or real-time system. Say N if you are unsure. 939 940config HZ 941 int 942 default 128 if ARCH_L7200 943 default 200 if ARCH_EBSA110 || ARCH_S3C2410 944 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER 945 default AT91_TIMER_HZ if ARCH_AT91 946 default 100 947 948config AEABI 949 bool "Use the ARM EABI to compile the kernel" 950 help 951 This option allows for the kernel to be compiled using the latest 952 ARM ABI (aka EABI). This is only useful if you are using a user 953 space environment that is also compiled with EABI. 954 955 Since there are major incompatibilities between the legacy ABI and 956 EABI, especially with regard to structure member alignment, this 957 option also changes the kernel syscall calling convention to 958 disambiguate both ABIs and allow for backward compatibility support 959 (selected with CONFIG_OABI_COMPAT). 960 961 To use this you need GCC version 4.0.0 or later. 962 963config OABI_COMPAT 964 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" 965 depends on AEABI && EXPERIMENTAL 966 default y 967 help 968 This option preserves the old syscall interface along with the 969 new (ARM EABI) one. It also provides a compatibility layer to 970 intercept syscalls that have structure arguments which layout 971 in memory differs between the legacy ABI and the new ARM EABI 972 (only for non "thumb" binaries). This option adds a tiny 973 overhead to all syscalls and produces a slightly larger kernel. 974 If you know you'll be using only pure EABI user space then you 975 can say N here. If this option is not selected and you attempt 976 to execute a legacy ABI binary then the result will be 977 UNPREDICTABLE (in fact it can be predicted that it won't work 978 at all). If in doubt say Y. 979 980config ARCH_HAS_HOLES_MEMORYMODEL 981 bool 982 default n 983 984# Discontigmem is deprecated 985config ARCH_DISCONTIGMEM_ENABLE 986 bool 987 988config ARCH_SPARSEMEM_ENABLE 989 bool 990 991config ARCH_SPARSEMEM_DEFAULT 992 def_bool ARCH_SPARSEMEM_ENABLE 993 994config ARCH_SELECT_MEMORY_MODEL 995 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE 996 997config NODES_SHIFT 998 int 999 default "4" if ARCH_LH7A40X 1000 default "2" 1001 depends on NEED_MULTIPLE_NODES 1002 1003config HIGHMEM 1004 bool "High Memory Support (EXPERIMENTAL)" 1005 depends on MMU && EXPERIMENTAL 1006 help 1007 The address space of ARM processors is only 4 Gigabytes large 1008 and it has to accommodate user address space, kernel address 1009 space as well as some memory mapped IO. That means that, if you 1010 have a large amount of physical memory and/or IO, not all of the 1011 memory can be "permanently mapped" by the kernel. The physical 1012 memory that is not permanently mapped is called "high memory". 1013 1014 Depending on the selected kernel/user memory split, minimum 1015 vmalloc space and actual amount of RAM, you may not need this 1016 option which should result in a slightly faster kernel. 1017 1018 If unsure, say n. 1019 1020source "mm/Kconfig" 1021 1022config LEDS 1023 bool "Timer and CPU usage LEDs" 1024 depends on ARCH_CDB89712 || ARCH_EBSA110 || \ 1025 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \ 1026 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ 1027 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ 1028 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ 1029 ARCH_AT91 || ARCH_DAVINCI || \ 1030 ARCH_KS8695 || MACH_RD88F5182 1031 help 1032 If you say Y here, the LEDs on your machine will be used 1033 to provide useful information about your current system status. 1034 1035 If you are compiling a kernel for a NetWinder or EBSA-285, you will 1036 be able to select which LEDs are active using the options below. If 1037 you are compiling a kernel for the EBSA-110 or the LART however, the 1038 red LED will simply flash regularly to indicate that the system is 1039 still functional. It is safe to say Y here if you have a CATS 1040 system, but the driver will do nothing. 1041 1042config LEDS_TIMER 1043 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ 1044 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ 1045 || MACH_OMAP_PERSEUS2 1046 depends on LEDS 1047 depends on !GENERIC_CLOCKEVENTS 1048 default y if ARCH_EBSA110 1049 help 1050 If you say Y here, one of the system LEDs (the green one on the 1051 NetWinder, the amber one on the EBSA285, or the red one on the LART) 1052 will flash regularly to indicate that the system is still 1053 operational. This is mainly useful to kernel hackers who are 1054 debugging unstable kernels. 1055 1056 The LART uses the same LED for both Timer LED and CPU usage LED 1057 functions. You may choose to use both, but the Timer LED function 1058 will overrule the CPU usage LED. 1059 1060config LEDS_CPU 1061 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ 1062 !ARCH_OMAP) \ 1063 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ 1064 || MACH_OMAP_PERSEUS2 1065 depends on LEDS 1066 help 1067 If you say Y here, the red LED will be used to give a good real 1068 time indication of CPU usage, by lighting whenever the idle task 1069 is not currently executing. 1070 1071 The LART uses the same LED for both Timer LED and CPU usage LED 1072 functions. You may choose to use both, but the Timer LED function 1073 will overrule the CPU usage LED. 1074 1075config ALIGNMENT_TRAP 1076 bool 1077 depends on CPU_CP15_MMU 1078 default y if !ARCH_EBSA110 1079 help 1080 ARM processors cannot fetch/store information which is not 1081 naturally aligned on the bus, i.e., a 4 byte fetch must start at an 1082 address divisible by 4. On 32-bit ARM processors, these non-aligned 1083 fetch/store instructions will be emulated in software if you say 1084 here, which has a severe performance impact. This is necessary for 1085 correct operation of some network protocols. With an IP-only 1086 configuration it is safe to say N, otherwise say Y. 1087 1088endmenu 1089 1090menu "Boot options" 1091 1092# Compressed boot loader in ROM. Yes, we really want to ask about 1093# TEXT and BSS so we preserve their values in the config files. 1094config ZBOOT_ROM_TEXT 1095 hex "Compressed ROM boot loader base address" 1096 default "0" 1097 help 1098 The physical address at which the ROM-able zImage is to be 1099 placed in the target. Platforms which normally make use of 1100 ROM-able zImage formats normally set this to a suitable 1101 value in their defconfig file. 1102 1103 If ZBOOT_ROM is not enabled, this has no effect. 1104 1105config ZBOOT_ROM_BSS 1106 hex "Compressed ROM boot loader BSS address" 1107 default "0" 1108 help 1109 The base address of an area of read/write memory in the target 1110 for the ROM-able zImage which must be available while the 1111 decompressor is running. It must be large enough to hold the 1112 entire decompressed kernel plus an additional 128 KiB. 1113 Platforms which normally make use of ROM-able zImage formats 1114 normally set this to a suitable value in their defconfig file. 1115 1116 If ZBOOT_ROM is not enabled, this has no effect. 1117 1118config ZBOOT_ROM 1119 bool "Compressed boot loader in ROM/flash" 1120 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS 1121 help 1122 Say Y here if you intend to execute your compressed kernel image 1123 (zImage) directly from ROM or flash. If unsure, say N. 1124 1125config CMDLINE 1126 string "Default kernel command string" 1127 default "" 1128 help 1129 On some architectures (EBSA110 and CATS), there is currently no way 1130 for the boot loader to pass arguments to the kernel. For these 1131 architectures, you should supply some command-line options at build 1132 time by entering them here. As a minimum, you should specify the 1133 memory size and the root device (e.g., mem=64M root=/dev/nfs). 1134 1135config XIP_KERNEL 1136 bool "Kernel Execute-In-Place from ROM" 1137 depends on !ZBOOT_ROM 1138 help 1139 Execute-In-Place allows the kernel to run from non-volatile storage 1140 directly addressable by the CPU, such as NOR flash. This saves RAM 1141 space since the text section of the kernel is not loaded from flash 1142 to RAM. Read-write sections, such as the data section and stack, 1143 are still copied to RAM. The XIP kernel is not compressed since 1144 it has to run directly from flash, so it will take more space to 1145 store it. The flash address used to link the kernel object files, 1146 and for storing it, is configuration dependent. Therefore, if you 1147 say Y here, you must know the proper physical address where to 1148 store the kernel image depending on your own flash memory usage. 1149 1150 Also note that the make target becomes "make xipImage" rather than 1151 "make zImage" or "make Image". The final kernel binary to put in 1152 ROM memory will be arch/arm/boot/xipImage. 1153 1154 If unsure, say N. 1155 1156config XIP_PHYS_ADDR 1157 hex "XIP Kernel Physical Location" 1158 depends on XIP_KERNEL 1159 default "0x00080000" 1160 help 1161 This is the physical address in your flash memory the kernel will 1162 be linked for and stored to. This address is dependent on your 1163 own flash usage. 1164 1165config KEXEC 1166 bool "Kexec system call (EXPERIMENTAL)" 1167 depends on EXPERIMENTAL 1168 help 1169 kexec is a system call that implements the ability to shutdown your 1170 current kernel, and to start another kernel. It is like a reboot 1171 but it is independent of the system firmware. And like a reboot 1172 you can start any kernel with it, not just Linux. 1173 1174 It is an ongoing process to be certain the hardware in a machine 1175 is properly shutdown, so do not be surprised if this code does not 1176 initially work for you. It may help to enable device hotplugging 1177 support. 1178 1179config ATAGS_PROC 1180 bool "Export atags in procfs" 1181 depends on KEXEC 1182 default y 1183 help 1184 Should the atags used to boot the kernel be exported in an "atags" 1185 file in procfs. Useful with kexec. 1186 1187endmenu 1188 1189menu "CPU Power Management" 1190 1191if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA) 1192 1193source "drivers/cpufreq/Kconfig" 1194 1195config CPU_FREQ_SA1100 1196 bool 1197 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT) 1198 default y 1199 1200config CPU_FREQ_SA1110 1201 bool 1202 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3) 1203 default y 1204 1205config CPU_FREQ_INTEGRATOR 1206 tristate "CPUfreq driver for ARM Integrator CPUs" 1207 depends on ARCH_INTEGRATOR && CPU_FREQ 1208 default y 1209 help 1210 This enables the CPUfreq driver for ARM Integrator CPUs. 1211 1212 For details, take a look at <file:Documentation/cpu-freq>. 1213 1214 If in doubt, say Y. 1215 1216config CPU_FREQ_IMX 1217 tristate "CPUfreq driver for i.MX CPUs" 1218 depends on ARCH_IMX && CPU_FREQ 1219 default n 1220 help 1221 This enables the CPUfreq driver for i.MX CPUs. 1222 1223 If in doubt, say N. 1224 1225endif 1226 1227source "drivers/cpuidle/Kconfig" 1228 1229endmenu 1230 1231menu "Floating point emulation" 1232 1233comment "At least one emulation must be selected" 1234 1235config FPE_NWFPE 1236 bool "NWFPE math emulation" 1237 depends on !AEABI || OABI_COMPAT 1238 ---help--- 1239 Say Y to include the NWFPE floating point emulator in the kernel. 1240 This is necessary to run most binaries. Linux does not currently 1241 support floating point hardware so you need to say Y here even if 1242 your machine has an FPA or floating point co-processor podule. 1243 1244 You may say N here if you are going to load the Acorn FPEmulator 1245 early in the bootup. 1246 1247config FPE_NWFPE_XP 1248 bool "Support extended precision" 1249 depends on FPE_NWFPE 1250 help 1251 Say Y to include 80-bit support in the kernel floating-point 1252 emulator. Otherwise, only 32 and 64-bit support is compiled in. 1253 Note that gcc does not generate 80-bit operations by default, 1254 so in most cases this option only enlarges the size of the 1255 floating point emulator without any good reason. 1256 1257 You almost surely want to say N here. 1258 1259config FPE_FASTFPE 1260 bool "FastFPE math emulation (EXPERIMENTAL)" 1261 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL 1262 ---help--- 1263 Say Y here to include the FAST floating point emulator in the kernel. 1264 This is an experimental much faster emulator which now also has full 1265 precision for the mantissa. It does not support any exceptions. 1266 It is very simple, and approximately 3-6 times faster than NWFPE. 1267 1268 It should be sufficient for most programs. It may be not suitable 1269 for scientific calculations, but you have to check this for yourself. 1270 If you do not feel you need a faster FP emulation you should better 1271 choose NWFPE. 1272 1273config VFP 1274 bool "VFP-format floating point maths" 1275 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON 1276 help 1277 Say Y to include VFP support code in the kernel. This is needed 1278 if your hardware includes a VFP unit. 1279 1280 Please see <file:Documentation/arm/VFP/release-notes.txt> for 1281 release notes and additional status information. 1282 1283 Say N if your target does not have VFP hardware. 1284 1285config VFPv3 1286 bool 1287 depends on VFP 1288 default y if CPU_V7 1289 1290config NEON 1291 bool "Advanced SIMD (NEON) Extension support" 1292 depends on VFPv3 && CPU_V7 1293 help 1294 Say Y to include support code for NEON, the ARMv7 Advanced SIMD 1295 Extension. 1296 1297endmenu 1298 1299menu "Userspace binary formats" 1300 1301source "fs/Kconfig.binfmt" 1302 1303config ARTHUR 1304 tristate "RISC OS personality" 1305 depends on !AEABI 1306 help 1307 Say Y here to include the kernel code necessary if you want to run 1308 Acorn RISC OS/Arthur binaries under Linux. This code is still very 1309 experimental; if this sounds frightening, say N and sleep in peace. 1310 You can also say M here to compile this support as a module (which 1311 will be called arthur). 1312 1313endmenu 1314 1315menu "Power management options" 1316 1317source "kernel/power/Kconfig" 1318 1319config ARCH_SUSPEND_POSSIBLE 1320 def_bool y 1321 1322endmenu 1323 1324source "net/Kconfig" 1325 1326menu "Device Drivers" 1327 1328source "drivers/base/Kconfig" 1329 1330source "drivers/connector/Kconfig" 1331 1332if ALIGNMENT_TRAP || !CPU_CP15_MMU 1333source "drivers/mtd/Kconfig" 1334endif 1335 1336source "drivers/parport/Kconfig" 1337 1338source "drivers/pnp/Kconfig" 1339 1340source "drivers/block/Kconfig" 1341 1342# misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4 1343 1344source "drivers/misc/Kconfig" 1345 1346source "drivers/ide/Kconfig" 1347 1348source "drivers/scsi/Kconfig" 1349 1350source "drivers/ata/Kconfig" 1351 1352source "drivers/md/Kconfig" 1353 1354source "drivers/message/fusion/Kconfig" 1355 1356source "drivers/ieee1394/Kconfig" 1357 1358source "drivers/message/i2o/Kconfig" 1359 1360source "drivers/net/Kconfig" 1361 1362source "drivers/isdn/Kconfig" 1363 1364# input before char - char/joystick depends on it. As does USB. 1365 1366source "drivers/input/Kconfig" 1367 1368source "drivers/char/Kconfig" 1369 1370source "drivers/i2c/Kconfig" 1371 1372source "drivers/spi/Kconfig" 1373 1374source "drivers/gpio/Kconfig" 1375 1376source "drivers/w1/Kconfig" 1377 1378source "drivers/power/Kconfig" 1379 1380source "drivers/hwmon/Kconfig" 1381 1382source "drivers/thermal/Kconfig" 1383 1384source "drivers/watchdog/Kconfig" 1385 1386source "drivers/ssb/Kconfig" 1387 1388#source "drivers/l3/Kconfig" 1389 1390source "drivers/mfd/Kconfig" 1391 1392source "drivers/media/Kconfig" 1393 1394source "drivers/video/Kconfig" 1395 1396source "sound/Kconfig" 1397 1398source "drivers/hid/Kconfig" 1399 1400source "drivers/usb/Kconfig" 1401 1402source "drivers/uwb/Kconfig" 1403 1404source "drivers/mmc/Kconfig" 1405 1406source "drivers/memstick/Kconfig" 1407 1408source "drivers/accessibility/Kconfig" 1409 1410source "drivers/leds/Kconfig" 1411 1412source "drivers/rtc/Kconfig" 1413 1414source "drivers/dma/Kconfig" 1415 1416source "drivers/dca/Kconfig" 1417 1418source "drivers/auxdisplay/Kconfig" 1419 1420source "drivers/regulator/Kconfig" 1421 1422source "drivers/uio/Kconfig" 1423 1424source "drivers/staging/Kconfig" 1425 1426endmenu 1427 1428source "fs/Kconfig" 1429 1430source "arch/arm/Kconfig.debug" 1431 1432source "security/Kconfig" 1433 1434source "crypto/Kconfig" 1435 1436source "lib/Kconfig" 1437