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 help 277 This enables support for the Cirrus EP93xx series of CPUs. 278 279config ARCH_GEMINI 280 bool "Cortina Systems Gemini" 281 select CPU_FA526 282 select GENERIC_GPIO 283 select ARCH_REQUIRE_GPIOLIB 284 help 285 Support for the Cortina Systems Gemini family SoCs 286 287config ARCH_FOOTBRIDGE 288 bool "FootBridge" 289 select CPU_SA110 290 select FOOTBRIDGE 291 help 292 Support for systems based on the DC21285 companion chip 293 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. 294 295config ARCH_NETX 296 bool "Hilscher NetX based" 297 select CPU_ARM926T 298 select ARM_VIC 299 select GENERIC_CLOCKEVENTS 300 select GENERIC_TIME 301 help 302 This enables support for systems based on the Hilscher NetX Soc 303 304config ARCH_H720X 305 bool "Hynix HMS720x-based" 306 select CPU_ARM720T 307 select ISA_DMA_API 308 help 309 This enables support for systems based on the Hynix HMS720x 310 311config ARCH_IMX 312 bool "IMX" 313 select CPU_ARM920T 314 select GENERIC_GPIO 315 select GENERIC_TIME 316 select GENERIC_CLOCKEVENTS 317 help 318 Support for Motorola's i.MX family of processors (MX1, MXL). 319 320config ARCH_IOP13XX 321 bool "IOP13xx-based" 322 depends on MMU 323 select CPU_XSC3 324 select PLAT_IOP 325 select PCI 326 select ARCH_SUPPORTS_MSI 327 select VMSPLIT_1G 328 help 329 Support for Intel's IOP13XX (XScale) family of processors. 330 331config ARCH_IOP32X 332 bool "IOP32x-based" 333 depends on MMU 334 select CPU_XSCALE 335 select PLAT_IOP 336 select PCI 337 select GENERIC_GPIO 338 select ARCH_REQUIRE_GPIOLIB 339 help 340 Support for Intel's 80219 and IOP32X (XScale) family of 341 processors. 342 343config ARCH_IOP33X 344 bool "IOP33x-based" 345 depends on MMU 346 select CPU_XSCALE 347 select PLAT_IOP 348 select PCI 349 select GENERIC_GPIO 350 select ARCH_REQUIRE_GPIOLIB 351 help 352 Support for Intel's IOP33X (XScale) family of processors. 353 354config ARCH_IXP23XX 355 bool "IXP23XX-based" 356 depends on MMU 357 select CPU_XSC3 358 select PCI 359 help 360 Support for Intel's IXP23xx (XScale) family of processors. 361 362config ARCH_IXP2000 363 bool "IXP2400/2800-based" 364 depends on MMU 365 select CPU_XSCALE 366 select PCI 367 help 368 Support for Intel's IXP2400/2800 (XScale) family of processors. 369 370config ARCH_IXP4XX 371 bool "IXP4xx-based" 372 depends on MMU 373 select CPU_XSCALE 374 select GENERIC_GPIO 375 select GENERIC_TIME 376 select GENERIC_CLOCKEVENTS 377 select DMABOUNCE if PCI 378 help 379 Support for Intel's IXP4XX (XScale) family of processors. 380 381config ARCH_L7200 382 bool "LinkUp-L7200" 383 select CPU_ARM720T 384 select FIQ 385 help 386 Say Y here if you intend to run this kernel on a LinkUp Systems 387 L7200 Software Development Board which uses an ARM720T processor. 388 Information on this board can be obtained at: 389 390 <http://www.linkupsys.com/> 391 392 If you have any questions or comments about the Linux kernel port 393 to this board, send e-mail to <sjhill@cotw.com>. 394 395config ARCH_KIRKWOOD 396 bool "Marvell Kirkwood" 397 select CPU_FEROCEON 398 select PCI 399 select GENERIC_GPIO 400 select GENERIC_TIME 401 select GENERIC_CLOCKEVENTS 402 select PLAT_ORION 403 help 404 Support for the following Marvell Kirkwood series SoCs: 405 88F6180, 88F6192 and 88F6281. 406 407config ARCH_KS8695 408 bool "Micrel/Kendin KS8695" 409 select CPU_ARM922T 410 select GENERIC_GPIO 411 select ARCH_REQUIRE_GPIOLIB 412 help 413 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based 414 System-on-Chip devices. 415 416config ARCH_NS9XXX 417 bool "NetSilicon NS9xxx" 418 select CPU_ARM926T 419 select GENERIC_GPIO 420 select GENERIC_TIME 421 select GENERIC_CLOCKEVENTS 422 select HAVE_CLK 423 help 424 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx 425 System. 426 427 <http://www.digi.com/products/microprocessors/index.jsp> 428 429config ARCH_LOKI 430 bool "Marvell Loki (88RC8480)" 431 select CPU_FEROCEON 432 select GENERIC_TIME 433 select GENERIC_CLOCKEVENTS 434 select PLAT_ORION 435 help 436 Support for the Marvell Loki (88RC8480) SoC. 437 438config ARCH_MV78XX0 439 bool "Marvell MV78xx0" 440 select CPU_FEROCEON 441 select PCI 442 select GENERIC_GPIO 443 select GENERIC_TIME 444 select GENERIC_CLOCKEVENTS 445 select PLAT_ORION 446 help 447 Support for the following Marvell MV78xx0 series SoCs: 448 MV781x0, MV782x0. 449 450config ARCH_MXC 451 bool "Freescale MXC/iMX-based" 452 select GENERIC_TIME 453 select GENERIC_CLOCKEVENTS 454 select ARCH_MTD_XIP 455 select GENERIC_GPIO 456 select ARCH_REQUIRE_GPIOLIB 457 select HAVE_CLK 458 help 459 Support for Freescale MXC/iMX-based family of processors 460 461config ARCH_ORION5X 462 bool "Marvell Orion" 463 depends on MMU 464 select CPU_FEROCEON 465 select PCI 466 select GENERIC_GPIO 467 select GENERIC_TIME 468 select GENERIC_CLOCKEVENTS 469 select PLAT_ORION 470 help 471 Support for the following Marvell Orion 5x series SoCs: 472 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182), 473 Orion-2 (5281), Orion-1-90 (6183). 474 475config ARCH_PNX4008 476 bool "Philips Nexperia PNX4008 Mobile" 477 select CPU_ARM926T 478 select HAVE_CLK 479 help 480 This enables support for Philips PNX4008 mobile platform. 481 482config ARCH_PXA 483 bool "PXA2xx/PXA3xx-based" 484 depends on MMU 485 select ARCH_MTD_XIP 486 select GENERIC_GPIO 487 select HAVE_CLK 488 select COMMON_CLKDEV 489 select ARCH_REQUIRE_GPIOLIB 490 select GENERIC_TIME 491 select GENERIC_CLOCKEVENTS 492 select TICK_ONESHOT 493 select PLAT_PXA 494 help 495 Support for Intel/Marvell's PXA2xx/PXA3xx processor line. 496 497config ARCH_MMP 498 bool "Marvell PXA168/910" 499 depends on MMU 500 select GENERIC_GPIO 501 select ARCH_REQUIRE_GPIOLIB 502 select HAVE_CLK 503 select COMMON_CLKDEV 504 select GENERIC_TIME 505 select GENERIC_CLOCKEVENTS 506 select TICK_ONESHOT 507 select PLAT_PXA 508 help 509 Support for Marvell's PXA168/910 processor line. 510 511config ARCH_RPC 512 bool "RiscPC" 513 select ARCH_ACORN 514 select FIQ 515 select TIMER_ACORN 516 select ARCH_MAY_HAVE_PC_FDC 517 select HAVE_PATA_PLATFORM 518 select ISA_DMA_API 519 select NO_IOPORT 520 select ARCH_SPARSEMEM_ENABLE 521 help 522 On the Acorn Risc-PC, Linux can support the internal IDE disk and 523 CD-ROM interface, serial and parallel port, and the floppy drive. 524 525config ARCH_SA1100 526 bool "SA1100-based" 527 select CPU_SA1100 528 select ISA 529 select ARCH_SPARSEMEM_ENABLE 530 select ARCH_MTD_XIP 531 select GENERIC_GPIO 532 select GENERIC_TIME 533 select GENERIC_CLOCKEVENTS 534 select HAVE_CLK 535 select TICK_ONESHOT 536 select ARCH_REQUIRE_GPIOLIB 537 help 538 Support for StrongARM 11x0 based boards. 539 540config ARCH_S3C2410 541 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443" 542 select GENERIC_GPIO 543 select HAVE_CLK 544 help 545 Samsung S3C2410X CPU based systems, such as the Simtec Electronics 546 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or 547 the Samsung SMDK2410 development board (and derivatives). 548 549config ARCH_S3C64XX 550 bool "Samsung S3C64XX" 551 select GENERIC_GPIO 552 select HAVE_CLK 553 help 554 Samsung S3C64XX series based systems 555 556config ARCH_SHARK 557 bool "Shark" 558 select CPU_SA110 559 select ISA 560 select ISA_DMA 561 select ZONE_DMA 562 select PCI 563 help 564 Support for the StrongARM based Digital DNARD machine, also known 565 as "Shark" (<http://www.shark-linux.de/shark.html>). 566 567config ARCH_LH7A40X 568 bool "Sharp LH7A40X" 569 select CPU_ARM922T 570 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM 571 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM 572 help 573 Say Y here for systems based on one of the Sharp LH7A40X 574 System on a Chip processors. These CPUs include an ARM922T 575 core with a wide array of integrated devices for 576 hand-held and low-power applications. 577 578config ARCH_DAVINCI 579 bool "TI DaVinci" 580 select CPU_ARM926T 581 select GENERIC_TIME 582 select GENERIC_CLOCKEVENTS 583 select GENERIC_GPIO 584 select ARCH_REQUIRE_GPIOLIB 585 select HAVE_CLK 586 select ZONE_DMA 587 select HAVE_IDE 588 select COMMON_CLKDEV 589 help 590 Support for TI's DaVinci platform. 591 592config ARCH_OMAP 593 bool "TI OMAP" 594 select GENERIC_GPIO 595 select HAVE_CLK 596 select ARCH_REQUIRE_GPIOLIB 597 select GENERIC_TIME 598 select GENERIC_CLOCKEVENTS 599 help 600 Support for TI's OMAP platform (OMAP1 and OMAP2). 601 602config ARCH_MSM 603 bool "Qualcomm MSM" 604 select CPU_V6 605 select GENERIC_TIME 606 select GENERIC_CLOCKEVENTS 607 help 608 Support for Qualcomm MSM7K based systems. This runs on the ARM11 609 apps processor of the MSM7K and depends on a shared memory 610 interface to the ARM9 modem processor which runs the baseband stack 611 and controls some vital subsystems (clock and power control, etc). 612 613config ARCH_W90X900 614 bool "Nuvoton W90X900 CPU" 615 select CPU_ARM926T 616 help 617 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You 618 can login www.mcuos.com or www.nuvoton.com to know more. 619 620endchoice 621 622source "arch/arm/mach-clps711x/Kconfig" 623 624source "arch/arm/mach-ep93xx/Kconfig" 625 626source "arch/arm/mach-footbridge/Kconfig" 627 628source "arch/arm/mach-gemini/Kconfig" 629 630source "arch/arm/mach-integrator/Kconfig" 631 632source "arch/arm/mach-iop32x/Kconfig" 633 634source "arch/arm/mach-iop33x/Kconfig" 635 636source "arch/arm/mach-iop13xx/Kconfig" 637 638source "arch/arm/mach-ixp4xx/Kconfig" 639 640source "arch/arm/mach-ixp2000/Kconfig" 641 642source "arch/arm/mach-ixp23xx/Kconfig" 643 644source "arch/arm/mach-loki/Kconfig" 645 646source "arch/arm/mach-mv78xx0/Kconfig" 647 648source "arch/arm/mach-pxa/Kconfig" 649source "arch/arm/plat-pxa/Kconfig" 650 651source "arch/arm/mach-mmp/Kconfig" 652 653source "arch/arm/mach-sa1100/Kconfig" 654 655source "arch/arm/plat-omap/Kconfig" 656 657source "arch/arm/mach-omap1/Kconfig" 658 659source "arch/arm/mach-omap2/Kconfig" 660 661source "arch/arm/mach-orion5x/Kconfig" 662 663source "arch/arm/mach-kirkwood/Kconfig" 664 665source "arch/arm/plat-s3c24xx/Kconfig" 666source "arch/arm/plat-s3c64xx/Kconfig" 667source "arch/arm/plat-s3c/Kconfig" 668 669if ARCH_S3C2410 670source "arch/arm/mach-s3c2400/Kconfig" 671source "arch/arm/mach-s3c2410/Kconfig" 672source "arch/arm/mach-s3c2412/Kconfig" 673source "arch/arm/mach-s3c2440/Kconfig" 674source "arch/arm/mach-s3c2442/Kconfig" 675source "arch/arm/mach-s3c2443/Kconfig" 676endif 677 678if ARCH_S3C64XX 679source "arch/arm/mach-s3c6400/Kconfig" 680source "arch/arm/mach-s3c6410/Kconfig" 681endif 682 683source "arch/arm/mach-lh7a40x/Kconfig" 684 685source "arch/arm/mach-imx/Kconfig" 686 687source "arch/arm/mach-h720x/Kconfig" 688 689source "arch/arm/mach-versatile/Kconfig" 690 691source "arch/arm/mach-aaec2000/Kconfig" 692 693source "arch/arm/mach-realview/Kconfig" 694 695source "arch/arm/mach-at91/Kconfig" 696 697source "arch/arm/plat-mxc/Kconfig" 698 699source "arch/arm/mach-netx/Kconfig" 700 701source "arch/arm/mach-ns9xxx/Kconfig" 702 703source "arch/arm/mach-davinci/Kconfig" 704 705source "arch/arm/mach-ks8695/Kconfig" 706 707source "arch/arm/mach-msm/Kconfig" 708 709source "arch/arm/mach-w90x900/Kconfig" 710 711# Definitions to make life easier 712config ARCH_ACORN 713 bool 714 715config PLAT_IOP 716 bool 717 718config PLAT_ORION 719 bool 720 721config PLAT_PXA 722 bool 723 724source arch/arm/mm/Kconfig 725 726config IWMMXT 727 bool "Enable iWMMXt support" 728 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK 729 default y if PXA27x || PXA3xx || ARCH_MMP 730 help 731 Enable support for iWMMXt context switching at run time if 732 running on a CPU that supports it. 733 734# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER 735config XSCALE_PMU 736 bool 737 depends on CPU_XSCALE && !XSCALE_PMU_TIMER 738 default y 739 740if !MMU 741source "arch/arm/Kconfig-nommu" 742endif 743 744config ARM_ERRATA_411920 745 bool "ARM errata: Invalidation of the Instruction Cache operation can fail" 746 depends on CPU_V6 && !SMP 747 help 748 Invalidation of the Instruction Cache operation can 749 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176. 750 It does not affect the MPCore. This option enables the ARM Ltd. 751 recommended workaround. 752 753config ARM_ERRATA_430973 754 bool "ARM errata: Stale prediction on replaced interworking branch" 755 depends on CPU_V7 756 help 757 This option enables the workaround for the 430973 Cortex-A8 758 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb 759 interworking branch is replaced with another code sequence at the 760 same virtual address, whether due to self-modifying code or virtual 761 to physical address re-mapping, Cortex-A8 does not recover from the 762 stale interworking branch prediction. This results in Cortex-A8 763 executing the new code sequence in the incorrect ARM or Thumb state. 764 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE 765 and also flushes the branch target cache at every context switch. 766 Note that setting specific bits in the ACTLR register may not be 767 available in non-secure mode. 768 769config ARM_ERRATA_458693 770 bool "ARM errata: Processor deadlock when a false hazard is created" 771 depends on CPU_V7 772 help 773 This option enables the workaround for the 458693 Cortex-A8 (r2p0) 774 erratum. For very specific sequences of memory operations, it is 775 possible for a hazard condition intended for a cache line to instead 776 be incorrectly associated with a different cache line. This false 777 hazard might then cause a processor deadlock. The workaround enables 778 the L1 caching of the NEON accesses and disables the PLD instruction 779 in the ACTLR register. Note that setting specific bits in the ACTLR 780 register may not be available in non-secure mode. 781 782config ARM_ERRATA_460075 783 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data" 784 depends on CPU_V7 785 help 786 This option enables the workaround for the 460075 Cortex-A8 (r2p0) 787 erratum. Any asynchronous access to the L2 cache may encounter a 788 situation in which recent store transactions to the L2 cache are lost 789 and overwritten with stale memory contents from external memory. The 790 workaround disables the write-allocate mode for the L2 cache via the 791 ACTLR register. Note that setting specific bits in the ACTLR register 792 may not be available in non-secure mode. 793 794endmenu 795 796source "arch/arm/common/Kconfig" 797 798config FORCE_MAX_ZONEORDER 799 int 800 depends on SA1111 801 default "9" 802 803menu "Bus support" 804 805config ARM_AMBA 806 bool 807 808config ISA 809 bool 810 help 811 Find out whether you have ISA slots on your motherboard. ISA is the 812 name of a bus system, i.e. the way the CPU talks to the other stuff 813 inside your box. Other bus systems are PCI, EISA, MicroChannel 814 (MCA) or VESA. ISA is an older system, now being displaced by PCI; 815 newer boards don't support it. If you have ISA, say Y, otherwise N. 816 817# Select ISA DMA controller support 818config ISA_DMA 819 bool 820 select ISA_DMA_API 821 822# Select ISA DMA interface 823config ISA_DMA_API 824 bool 825 826config PCI 827 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE 828 help 829 Find out whether you have a PCI motherboard. PCI is the name of a 830 bus system, i.e. the way the CPU talks to the other stuff inside 831 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or 832 VESA. If you have PCI, say Y, otherwise N. 833 834config PCI_SYSCALL 835 def_bool PCI 836 837# Select the host bridge type 838config PCI_HOST_VIA82C505 839 bool 840 depends on PCI && ARCH_SHARK 841 default y 842 843config PCI_HOST_ITE8152 844 bool 845 depends on PCI && MACH_ARMCORE 846 default y 847 select DMABOUNCE 848 849source "drivers/pci/Kconfig" 850 851source "drivers/pcmcia/Kconfig" 852 853endmenu 854 855menu "Kernel Features" 856 857source "kernel/time/Kconfig" 858 859config SMP 860 bool "Symmetric Multi-Processing (EXPERIMENTAL)" 861 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP) 862 depends on GENERIC_CLOCKEVENTS 863 select USE_GENERIC_SMP_HELPERS 864 select HAVE_ARM_SCU if ARCH_REALVIEW 865 help 866 This enables support for systems with more than one CPU. If you have 867 a system with only one CPU, like most personal computers, say N. If 868 you have a system with more than one CPU, say Y. 869 870 If you say N here, the kernel will run on single and multiprocessor 871 machines, but will use only one CPU of a multiprocessor machine. If 872 you say Y here, the kernel will run on many, but not all, single 873 processor machines. On a single processor machine, the kernel will 874 run faster if you say N here. 875 876 See also <file:Documentation/i386/IO-APIC.txt>, 877 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 878 <http://www.linuxdoc.org/docs.html#howto>. 879 880 If you don't know what to do here, say N. 881 882config HAVE_ARM_SCU 883 bool 884 depends on SMP 885 help 886 This option enables support for the ARM system coherency unit 887 888config HAVE_ARM_TWD 889 bool 890 depends on SMP 891 help 892 This options enables support for the ARM timer and watchdog unit 893 894choice 895 prompt "Memory split" 896 default VMSPLIT_3G 897 help 898 Select the desired split between kernel and user memory. 899 900 If you are not absolutely sure what you are doing, leave this 901 option alone! 902 903 config VMSPLIT_3G 904 bool "3G/1G user/kernel split" 905 config VMSPLIT_2G 906 bool "2G/2G user/kernel split" 907 config VMSPLIT_1G 908 bool "1G/3G user/kernel split" 909endchoice 910 911config PAGE_OFFSET 912 hex 913 default 0x40000000 if VMSPLIT_1G 914 default 0x80000000 if VMSPLIT_2G 915 default 0xC0000000 916 917config NR_CPUS 918 int "Maximum number of CPUs (2-32)" 919 range 2 32 920 depends on SMP 921 default "4" 922 923config HOTPLUG_CPU 924 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 925 depends on SMP && HOTPLUG && EXPERIMENTAL 926 help 927 Say Y here to experiment with turning CPUs off and on. CPUs 928 can be controlled through /sys/devices/system/cpu. 929 930config LOCAL_TIMERS 931 bool "Use local timer interrupts" 932 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP) 933 default y 934 select HAVE_ARM_TWD if ARCH_REALVIEW 935 help 936 Enable support for local timers on SMP platforms, rather then the 937 legacy IPI broadcast method. Local timers allows the system 938 accounting to be spread across the timer interval, preventing a 939 "thundering herd" at every timer tick. 940 941config PREEMPT 942 bool "Preemptible Kernel (EXPERIMENTAL)" 943 depends on EXPERIMENTAL 944 help 945 This option reduces the latency of the kernel when reacting to 946 real-time or interactive events by allowing a low priority process to 947 be preempted even if it is in kernel mode executing a system call. 948 This allows applications to run more reliably even when the system is 949 under load. 950 951 Say Y here if you are building a kernel for a desktop, embedded 952 or real-time system. Say N if you are unsure. 953 954config HZ 955 int 956 default 128 if ARCH_L7200 957 default 200 if ARCH_EBSA110 || ARCH_S3C2410 958 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER 959 default AT91_TIMER_HZ if ARCH_AT91 960 default 100 961 962config AEABI 963 bool "Use the ARM EABI to compile the kernel" 964 help 965 This option allows for the kernel to be compiled using the latest 966 ARM ABI (aka EABI). This is only useful if you are using a user 967 space environment that is also compiled with EABI. 968 969 Since there are major incompatibilities between the legacy ABI and 970 EABI, especially with regard to structure member alignment, this 971 option also changes the kernel syscall calling convention to 972 disambiguate both ABIs and allow for backward compatibility support 973 (selected with CONFIG_OABI_COMPAT). 974 975 To use this you need GCC version 4.0.0 or later. 976 977config OABI_COMPAT 978 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" 979 depends on AEABI && EXPERIMENTAL 980 default y 981 help 982 This option preserves the old syscall interface along with the 983 new (ARM EABI) one. It also provides a compatibility layer to 984 intercept syscalls that have structure arguments which layout 985 in memory differs between the legacy ABI and the new ARM EABI 986 (only for non "thumb" binaries). This option adds a tiny 987 overhead to all syscalls and produces a slightly larger kernel. 988 If you know you'll be using only pure EABI user space then you 989 can say N here. If this option is not selected and you attempt 990 to execute a legacy ABI binary then the result will be 991 UNPREDICTABLE (in fact it can be predicted that it won't work 992 at all). If in doubt say Y. 993 994config ARCH_FLATMEM_HAS_HOLES 995 bool 996 default y 997 depends on FLATMEM 998 999# Discontigmem is deprecated 1000config ARCH_DISCONTIGMEM_ENABLE 1001 bool 1002 1003config ARCH_SPARSEMEM_ENABLE 1004 bool 1005 1006config ARCH_SPARSEMEM_DEFAULT 1007 def_bool ARCH_SPARSEMEM_ENABLE 1008 1009config ARCH_SELECT_MEMORY_MODEL 1010 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE 1011 1012config NODES_SHIFT 1013 int 1014 default "4" if ARCH_LH7A40X 1015 default "2" 1016 depends on NEED_MULTIPLE_NODES 1017 1018config HIGHMEM 1019 bool "High Memory Support (EXPERIMENTAL)" 1020 depends on MMU && EXPERIMENTAL 1021 help 1022 The address space of ARM processors is only 4 Gigabytes large 1023 and it has to accommodate user address space, kernel address 1024 space as well as some memory mapped IO. That means that, if you 1025 have a large amount of physical memory and/or IO, not all of the 1026 memory can be "permanently mapped" by the kernel. The physical 1027 memory that is not permanently mapped is called "high memory". 1028 1029 Depending on the selected kernel/user memory split, minimum 1030 vmalloc space and actual amount of RAM, you may not need this 1031 option which should result in a slightly faster kernel. 1032 1033 If unsure, say n. 1034 1035source "mm/Kconfig" 1036 1037config LEDS 1038 bool "Timer and CPU usage LEDs" 1039 depends on ARCH_CDB89712 || ARCH_EBSA110 || \ 1040 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \ 1041 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ 1042 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ 1043 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ 1044 ARCH_AT91 || ARCH_DAVINCI || \ 1045 ARCH_KS8695 || MACH_RD88F5182 1046 help 1047 If you say Y here, the LEDs on your machine will be used 1048 to provide useful information about your current system status. 1049 1050 If you are compiling a kernel for a NetWinder or EBSA-285, you will 1051 be able to select which LEDs are active using the options below. If 1052 you are compiling a kernel for the EBSA-110 or the LART however, the 1053 red LED will simply flash regularly to indicate that the system is 1054 still functional. It is safe to say Y here if you have a CATS 1055 system, but the driver will do nothing. 1056 1057config LEDS_TIMER 1058 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ 1059 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ 1060 || MACH_OMAP_PERSEUS2 1061 depends on LEDS 1062 depends on !GENERIC_CLOCKEVENTS 1063 default y if ARCH_EBSA110 1064 help 1065 If you say Y here, one of the system LEDs (the green one on the 1066 NetWinder, the amber one on the EBSA285, or the red one on the LART) 1067 will flash regularly to indicate that the system is still 1068 operational. This is mainly useful to kernel hackers who are 1069 debugging unstable kernels. 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 LEDS_CPU 1076 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ 1077 !ARCH_OMAP) \ 1078 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ 1079 || MACH_OMAP_PERSEUS2 1080 depends on LEDS 1081 help 1082 If you say Y here, the red LED will be used to give a good real 1083 time indication of CPU usage, by lighting whenever the idle task 1084 is not currently executing. 1085 1086 The LART uses the same LED for both Timer LED and CPU usage LED 1087 functions. You may choose to use both, but the Timer LED function 1088 will overrule the CPU usage LED. 1089 1090config ALIGNMENT_TRAP 1091 bool 1092 depends on CPU_CP15_MMU 1093 default y if !ARCH_EBSA110 1094 help 1095 ARM processors cannot fetch/store information which is not 1096 naturally aligned on the bus, i.e., a 4 byte fetch must start at an 1097 address divisible by 4. On 32-bit ARM processors, these non-aligned 1098 fetch/store instructions will be emulated in software if you say 1099 here, which has a severe performance impact. This is necessary for 1100 correct operation of some network protocols. With an IP-only 1101 configuration it is safe to say N, otherwise say Y. 1102 1103endmenu 1104 1105menu "Boot options" 1106 1107# Compressed boot loader in ROM. Yes, we really want to ask about 1108# TEXT and BSS so we preserve their values in the config files. 1109config ZBOOT_ROM_TEXT 1110 hex "Compressed ROM boot loader base address" 1111 default "0" 1112 help 1113 The physical address at which the ROM-able zImage is to be 1114 placed in the target. Platforms which normally make use of 1115 ROM-able zImage formats normally set this to a suitable 1116 value in their defconfig file. 1117 1118 If ZBOOT_ROM is not enabled, this has no effect. 1119 1120config ZBOOT_ROM_BSS 1121 hex "Compressed ROM boot loader BSS address" 1122 default "0" 1123 help 1124 The base address of an area of read/write memory in the target 1125 for the ROM-able zImage which must be available while the 1126 decompressor is running. It must be large enough to hold the 1127 entire decompressed kernel plus an additional 128 KiB. 1128 Platforms which normally make use of ROM-able zImage formats 1129 normally set this to a suitable value in their defconfig file. 1130 1131 If ZBOOT_ROM is not enabled, this has no effect. 1132 1133config ZBOOT_ROM 1134 bool "Compressed boot loader in ROM/flash" 1135 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS 1136 help 1137 Say Y here if you intend to execute your compressed kernel image 1138 (zImage) directly from ROM or flash. If unsure, say N. 1139 1140config CMDLINE 1141 string "Default kernel command string" 1142 default "" 1143 help 1144 On some architectures (EBSA110 and CATS), there is currently no way 1145 for the boot loader to pass arguments to the kernel. For these 1146 architectures, you should supply some command-line options at build 1147 time by entering them here. As a minimum, you should specify the 1148 memory size and the root device (e.g., mem=64M root=/dev/nfs). 1149 1150config XIP_KERNEL 1151 bool "Kernel Execute-In-Place from ROM" 1152 depends on !ZBOOT_ROM 1153 help 1154 Execute-In-Place allows the kernel to run from non-volatile storage 1155 directly addressable by the CPU, such as NOR flash. This saves RAM 1156 space since the text section of the kernel is not loaded from flash 1157 to RAM. Read-write sections, such as the data section and stack, 1158 are still copied to RAM. The XIP kernel is not compressed since 1159 it has to run directly from flash, so it will take more space to 1160 store it. The flash address used to link the kernel object files, 1161 and for storing it, is configuration dependent. Therefore, if you 1162 say Y here, you must know the proper physical address where to 1163 store the kernel image depending on your own flash memory usage. 1164 1165 Also note that the make target becomes "make xipImage" rather than 1166 "make zImage" or "make Image". The final kernel binary to put in 1167 ROM memory will be arch/arm/boot/xipImage. 1168 1169 If unsure, say N. 1170 1171config XIP_PHYS_ADDR 1172 hex "XIP Kernel Physical Location" 1173 depends on XIP_KERNEL 1174 default "0x00080000" 1175 help 1176 This is the physical address in your flash memory the kernel will 1177 be linked for and stored to. This address is dependent on your 1178 own flash usage. 1179 1180config KEXEC 1181 bool "Kexec system call (EXPERIMENTAL)" 1182 depends on EXPERIMENTAL 1183 help 1184 kexec is a system call that implements the ability to shutdown your 1185 current kernel, and to start another kernel. It is like a reboot 1186 but it is independent of the system firmware. And like a reboot 1187 you can start any kernel with it, not just Linux. 1188 1189 It is an ongoing process to be certain the hardware in a machine 1190 is properly shutdown, so do not be surprised if this code does not 1191 initially work for you. It may help to enable device hotplugging 1192 support. 1193 1194config ATAGS_PROC 1195 bool "Export atags in procfs" 1196 depends on KEXEC 1197 default y 1198 help 1199 Should the atags used to boot the kernel be exported in an "atags" 1200 file in procfs. Useful with kexec. 1201 1202endmenu 1203 1204menu "CPU Power Management" 1205 1206if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA) 1207 1208source "drivers/cpufreq/Kconfig" 1209 1210config CPU_FREQ_SA1100 1211 bool 1212 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT) 1213 default y 1214 1215config CPU_FREQ_SA1110 1216 bool 1217 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3) 1218 default y 1219 1220config CPU_FREQ_INTEGRATOR 1221 tristate "CPUfreq driver for ARM Integrator CPUs" 1222 depends on ARCH_INTEGRATOR && CPU_FREQ 1223 default y 1224 help 1225 This enables the CPUfreq driver for ARM Integrator CPUs. 1226 1227 For details, take a look at <file:Documentation/cpu-freq>. 1228 1229 If in doubt, say Y. 1230 1231config CPU_FREQ_IMX 1232 tristate "CPUfreq driver for i.MX CPUs" 1233 depends on ARCH_IMX && CPU_FREQ 1234 default n 1235 help 1236 This enables the CPUfreq driver for i.MX CPUs. 1237 1238 If in doubt, say N. 1239 1240endif 1241 1242source "drivers/cpuidle/Kconfig" 1243 1244endmenu 1245 1246menu "Floating point emulation" 1247 1248comment "At least one emulation must be selected" 1249 1250config FPE_NWFPE 1251 bool "NWFPE math emulation" 1252 depends on !AEABI || OABI_COMPAT 1253 ---help--- 1254 Say Y to include the NWFPE floating point emulator in the kernel. 1255 This is necessary to run most binaries. Linux does not currently 1256 support floating point hardware so you need to say Y here even if 1257 your machine has an FPA or floating point co-processor podule. 1258 1259 You may say N here if you are going to load the Acorn FPEmulator 1260 early in the bootup. 1261 1262config FPE_NWFPE_XP 1263 bool "Support extended precision" 1264 depends on FPE_NWFPE 1265 help 1266 Say Y to include 80-bit support in the kernel floating-point 1267 emulator. Otherwise, only 32 and 64-bit support is compiled in. 1268 Note that gcc does not generate 80-bit operations by default, 1269 so in most cases this option only enlarges the size of the 1270 floating point emulator without any good reason. 1271 1272 You almost surely want to say N here. 1273 1274config FPE_FASTFPE 1275 bool "FastFPE math emulation (EXPERIMENTAL)" 1276 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL 1277 ---help--- 1278 Say Y here to include the FAST floating point emulator in the kernel. 1279 This is an experimental much faster emulator which now also has full 1280 precision for the mantissa. It does not support any exceptions. 1281 It is very simple, and approximately 3-6 times faster than NWFPE. 1282 1283 It should be sufficient for most programs. It may be not suitable 1284 for scientific calculations, but you have to check this for yourself. 1285 If you do not feel you need a faster FP emulation you should better 1286 choose NWFPE. 1287 1288config VFP 1289 bool "VFP-format floating point maths" 1290 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON 1291 help 1292 Say Y to include VFP support code in the kernel. This is needed 1293 if your hardware includes a VFP unit. 1294 1295 Please see <file:Documentation/arm/VFP/release-notes.txt> for 1296 release notes and additional status information. 1297 1298 Say N if your target does not have VFP hardware. 1299 1300config VFPv3 1301 bool 1302 depends on VFP 1303 default y if CPU_V7 1304 1305config NEON 1306 bool "Advanced SIMD (NEON) Extension support" 1307 depends on VFPv3 && CPU_V7 1308 help 1309 Say Y to include support code for NEON, the ARMv7 Advanced SIMD 1310 Extension. 1311 1312endmenu 1313 1314menu "Userspace binary formats" 1315 1316source "fs/Kconfig.binfmt" 1317 1318config ARTHUR 1319 tristate "RISC OS personality" 1320 depends on !AEABI 1321 help 1322 Say Y here to include the kernel code necessary if you want to run 1323 Acorn RISC OS/Arthur binaries under Linux. This code is still very 1324 experimental; if this sounds frightening, say N and sleep in peace. 1325 You can also say M here to compile this support as a module (which 1326 will be called arthur). 1327 1328endmenu 1329 1330menu "Power management options" 1331 1332source "kernel/power/Kconfig" 1333 1334config ARCH_SUSPEND_POSSIBLE 1335 def_bool y 1336 1337endmenu 1338 1339source "net/Kconfig" 1340 1341menu "Device Drivers" 1342 1343source "drivers/base/Kconfig" 1344 1345source "drivers/connector/Kconfig" 1346 1347if ALIGNMENT_TRAP || !CPU_CP15_MMU 1348source "drivers/mtd/Kconfig" 1349endif 1350 1351source "drivers/parport/Kconfig" 1352 1353source "drivers/pnp/Kconfig" 1354 1355source "drivers/block/Kconfig" 1356 1357# misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4 1358 1359source "drivers/misc/Kconfig" 1360 1361source "drivers/ide/Kconfig" 1362 1363source "drivers/scsi/Kconfig" 1364 1365source "drivers/ata/Kconfig" 1366 1367source "drivers/md/Kconfig" 1368 1369source "drivers/message/fusion/Kconfig" 1370 1371source "drivers/ieee1394/Kconfig" 1372 1373source "drivers/message/i2o/Kconfig" 1374 1375source "drivers/net/Kconfig" 1376 1377source "drivers/isdn/Kconfig" 1378 1379# input before char - char/joystick depends on it. As does USB. 1380 1381source "drivers/input/Kconfig" 1382 1383source "drivers/char/Kconfig" 1384 1385source "drivers/i2c/Kconfig" 1386 1387source "drivers/spi/Kconfig" 1388 1389source "drivers/gpio/Kconfig" 1390 1391source "drivers/w1/Kconfig" 1392 1393source "drivers/power/Kconfig" 1394 1395source "drivers/hwmon/Kconfig" 1396 1397source "drivers/thermal/Kconfig" 1398 1399source "drivers/watchdog/Kconfig" 1400 1401source "drivers/ssb/Kconfig" 1402 1403#source "drivers/l3/Kconfig" 1404 1405source "drivers/mfd/Kconfig" 1406 1407source "drivers/media/Kconfig" 1408 1409source "drivers/video/Kconfig" 1410 1411source "sound/Kconfig" 1412 1413source "drivers/hid/Kconfig" 1414 1415source "drivers/usb/Kconfig" 1416 1417source "drivers/uwb/Kconfig" 1418 1419source "drivers/mmc/Kconfig" 1420 1421source "drivers/memstick/Kconfig" 1422 1423source "drivers/accessibility/Kconfig" 1424 1425source "drivers/leds/Kconfig" 1426 1427source "drivers/rtc/Kconfig" 1428 1429source "drivers/dma/Kconfig" 1430 1431source "drivers/dca/Kconfig" 1432 1433source "drivers/auxdisplay/Kconfig" 1434 1435source "drivers/regulator/Kconfig" 1436 1437source "drivers/uio/Kconfig" 1438 1439source "drivers/staging/Kconfig" 1440 1441endmenu 1442 1443source "fs/Kconfig" 1444 1445source "arch/arm/Kconfig.debug" 1446 1447source "security/Kconfig" 1448 1449source "crypto/Kconfig" 1450 1451source "lib/Kconfig" 1452