arch/arm/Kconfig

   1 #
   2 # For a description of the syntax of this configuration file,
   3 # see Documentation/kbuild/kconfig-language.txt.
   4 #
   5
   6 mainmenu "Linux Kernel Configuration"
   7
   8 config 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
  29 config HAVE_PWM
  30         bool
  31
  32 config SYS_SUPPORTS_APM_EMULATION
  33         bool
  34
  35 config GENERIC_GPIO
  36         bool
  37
  38 config GENERIC_TIME
  39         bool
  40
  41 config GENERIC_CLOCKEVENTS
  42         bool
  43
  44 config GENERIC_CLOCKEVENTS_BROADCAST
  45         bool
  46         depends on GENERIC_CLOCKEVENTS
  47         default y if SMP && !LOCAL_TIMERS
  48
  49 config NO_IOPORT
  50         bool
  51
  52 config EISA
  53         bool
  54         ---help---
  55           The Extended Industry Standard Architecture (EISA) bus was
  56           developed as an open alternative to the IBM MicroChannel bus.
  57
  58           The EISA bus provided some of the features of the IBM MicroChannel
  59           bus while maintaining backward compatibility with cards made for
  60           the older ISA bus.  The EISA bus saw limited use between 1988 and
  61           1995 when it was made obsolete by the PCI bus.
  62
  63           Say Y here if you are building a kernel for an EISA-based machine.
  64
  65           Otherwise, say N.
  66
  67 config SBUS
  68         bool
  69
  70 config MCA
  71         bool
  72         help
  73           MicroChannel Architecture is found in some IBM PS/2 machines and
  74           laptops.  It is a bus system similar to PCI or ISA. See
  75           <file:Documentation/mca.txt> (and especially the web page given
  76           there) before attempting to build an MCA bus kernel.
  77
  78 config GENERIC_HARDIRQS
  79         bool
  80         default y
  81
  82 config STACKTRACE_SUPPORT
  83         bool
  84         default y
  85
  86 config HAVE_LATENCYTOP_SUPPORT
  87         bool
  88         depends on !SMP
  89         default y
  90
  91 config LOCKDEP_SUPPORT
  92         bool
  93         default y
  94
  95 config TRACE_IRQFLAGS_SUPPORT
  96         bool
  97         default y
  98
  99 config HARDIRQS_SW_RESEND
 100         bool
 101         default y
 102
 103 config GENERIC_IRQ_PROBE
 104         bool
 105         default y
 106
 107 config GENERIC_LOCKBREAK
 108         bool
 109         default y
 110         depends on SMP && PREEMPT
 111
 112 config RWSEM_GENERIC_SPINLOCK
 113         bool
 114         default y
 115
 116 config RWSEM_XCHGADD_ALGORITHM
 117         bool
 118
 119 config ARCH_HAS_ILOG2_U32
 120         bool
 121
 122 config ARCH_HAS_ILOG2_U64
 123         bool
 124
 125 config GENERIC_HWEIGHT
 126         bool
 127         default y
 128
 129 config GENERIC_CALIBRATE_DELAY
 130         bool
 131         default y
 132
 133 config ARCH_MAY_HAVE_PC_FDC
 134         bool
 135
 136 config ZONE_DMA
 137         bool
 138
 139 config GENERIC_ISA_DMA
 140         bool
 141
 142 config FIQ
 143         bool
 144
 145 config ARCH_MTD_XIP
 146         bool
 147
 148 config GENERIC_HARDIRQS_NO__DO_IRQ
 149         def_bool y
 150
 151 if OPROFILE
 152
 153 config OPROFILE_ARMV6
 154         def_bool y
 155         depends on CPU_V6 && !SMP
 156         select OPROFILE_ARM11_CORE
 157
 158 config OPROFILE_MPCORE
 159         def_bool y
 160         depends on CPU_V6 && SMP
 161         select OPROFILE_ARM11_CORE
 162
 163 config OPROFILE_ARM11_CORE
 164         bool
 165
 166 config OPROFILE_ARMV7
 167         def_bool y
 168         depends on CPU_V7 && !SMP
 169         bool
 170
 171 endif
 172
 173 config VECTORS_BASE
 174         hex
 175         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 176         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 177         default 0x00000000
 178         help
 179           The base address of exception vectors.
 180
 181 source "init/Kconfig"
 182
 183 source "kernel/Kconfig.freezer"
 184
 185 menu "System Type"
 186
 187 config MMU
 188         bool "MMU-based Paged Memory Management Support"
 189         default y
 190         help
 191           Select if you want MMU-based virtualised addressing space
 192           support by paged memory management. If unsure, say 'Y'.
 193
 194 choice
 195         prompt "ARM system type"
 196         default ARCH_VERSATILE
 197
 198 config ARCH_AAEC2000
 199         bool "Agilent AAEC-2000 based"
 200         select CPU_ARM920T
 201         select ARM_AMBA
 202         select HAVE_CLK
 203         help
 204           This enables support for systems based on the Agilent AAEC-2000
 205
 206 config ARCH_INTEGRATOR
 207         bool "ARM Ltd. Integrator family"
 208         select ARM_AMBA
 209         select HAVE_CLK
 210         select COMMON_CLKDEV
 211         select ICST525
 212         help
 213           Support for ARM's Integrator platform.
 214
 215 config ARCH_REALVIEW
 216         bool "ARM Ltd. RealView family"
 217         select ARM_AMBA
 218         select HAVE_CLK
 219         select COMMON_CLKDEV
 220         select ICST307
 221         select GENERIC_TIME
 222         select GENERIC_CLOCKEVENTS
 223         help
 224           This enables support for ARM Ltd RealView boards.
 225
 226 config ARCH_VERSATILE
 227         bool "ARM Ltd. Versatile family"
 228         select ARM_AMBA
 229         select ARM_VIC
 230         select HAVE_CLK
 231         select COMMON_CLKDEV
 232         select ICST307
 233         select GENERIC_TIME
 234         select GENERIC_CLOCKEVENTS
 235         help
 236           This enables support for ARM Ltd Versatile board.
 237
 238 config ARCH_AT91
 239         bool "Atmel AT91"
 240         select GENERIC_GPIO
 241         select ARCH_REQUIRE_GPIOLIB
 242         select HAVE_CLK
 243         help
 244           This enables support for systems based on the Atmel AT91RM9200,
 245           AT91SAM9 and AT91CAP9 processors.
 246
 247 config ARCH_CLPS711X
 248         bool "Cirrus Logic CLPS711x/EP721x-based"
 249         select CPU_ARM720T
 250         help
 251           Support for Cirrus Logic 711x/721x based boards.
 252
 253 config ARCH_GEMINI
 254         bool "Cortina Systems Gemini"
 255         select CPU_FA526
 256         select GENERIC_GPIO
 257         select ARCH_REQUIRE_GPIOLIB
 258         help
 259           Support for the Cortina Systems Gemini family SoCs
 260
 261 config ARCH_EBSA110
 262         bool "EBSA-110"
 263         select CPU_SA110
 264         select ISA
 265         select NO_IOPORT
 266         help
 267           This is an evaluation board for the StrongARM processor available
 268           from Digital. It has limited hardware on-board, including an
 269           Ethernet interface, two PCMCIA sockets, two serial ports and a
 270           parallel port.
 271
 272 config ARCH_EP93XX
 273         bool "EP93xx-based"
 274         select CPU_ARM920T
 275         select ARM_AMBA
 276         select ARM_VIC
 277         select GENERIC_GPIO
 278         select HAVE_CLK
 279         select COMMON_CLKDEV
 280         select ARCH_REQUIRE_GPIOLIB
 281         select ARCH_HAS_HOLES_MEMORYMODEL
 282         help
 283           This enables support for the Cirrus EP93xx series of CPUs.
 284
 285 config ARCH_FOOTBRIDGE
 286         bool "FootBridge"
 287         select CPU_SA110
 288         select FOOTBRIDGE
 289         help
 290           Support for systems based on the DC21285 companion chip
 291           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 292
 293 config ARCH_MXC
 294         bool "Freescale MXC/iMX-based"
 295         select GENERIC_TIME
 296         select GENERIC_CLOCKEVENTS
 297         select ARCH_MTD_XIP
 298         select GENERIC_GPIO
 299         select ARCH_REQUIRE_GPIOLIB
 300         select HAVE_CLK
 301         help
 302           Support for Freescale MXC/iMX-based family of processors
 303
 304 config ARCH_STMP3XXX
 305         bool "Freescale STMP3xxx"
 306         select CPU_ARM926T
 307         select HAVE_CLK
 308         select COMMON_CLKDEV
 309         select ARCH_REQUIRE_GPIOLIB
 310         select GENERIC_TIME
 311         select GENERIC_CLOCKEVENTS
 312         select GENERIC_GPIO
 313         select USB_ARCH_HAS_EHCI
 314         help
 315           Support for systems based on the Freescale 3xxx CPUs.
 316
 317 config ARCH_NETX
 318         bool "Hilscher NetX based"
 319         select CPU_ARM926T
 320         select ARM_VIC
 321         select GENERIC_CLOCKEVENTS
 322         select GENERIC_TIME
 323         help
 324           This enables support for systems based on the Hilscher NetX Soc
 325
 326 config ARCH_H720X
 327         bool "Hynix HMS720x-based"
 328         select CPU_ARM720T
 329         select ISA_DMA_API
 330         help
 331           This enables support for systems based on the Hynix HMS720x
 332
 333 config ARCH_IOP13XX
 334         bool "IOP13xx-based"
 335         depends on MMU
 336         select CPU_XSC3
 337         select PLAT_IOP
 338         select PCI
 339         select ARCH_SUPPORTS_MSI
 340         select VMSPLIT_1G
 341         help
 342           Support for Intel's IOP13XX (XScale) family of processors.
 343
 344 config ARCH_IOP32X
 345         bool "IOP32x-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 80219 and IOP32X (XScale) family of
 354           processors.
 355
 356 config ARCH_IOP33X
 357         bool "IOP33x-based"
 358         depends on MMU
 359         select CPU_XSCALE
 360         select PLAT_IOP
 361         select PCI
 362         select GENERIC_GPIO
 363         select ARCH_REQUIRE_GPIOLIB
 364         help
 365           Support for Intel's IOP33X (XScale) family of processors.
 366
 367 config ARCH_IXP23XX
 368         bool "IXP23XX-based"
 369         depends on MMU
 370         select CPU_XSC3
 371         select PCI
 372         help
 373           Support for Intel's IXP23xx (XScale) family of processors.
 374
 375 config ARCH_IXP2000
 376         bool "IXP2400/2800-based"
 377         depends on MMU
 378         select CPU_XSCALE
 379         select PCI
 380         help
 381           Support for Intel's IXP2400/2800 (XScale) family of processors.
 382
 383 config ARCH_IXP4XX
 384         bool "IXP4xx-based"
 385         depends on MMU
 386         select CPU_XSCALE
 387         select GENERIC_GPIO
 388         select GENERIC_TIME
 389         select GENERIC_CLOCKEVENTS
 390         select DMABOUNCE if PCI
 391         help
 392           Support for Intel's IXP4XX (XScale) family of processors.
 393
 394 config ARCH_L7200
 395         bool "LinkUp-L7200"
 396         select CPU_ARM720T
 397         select FIQ
 398         help
 399           Say Y here if you intend to run this kernel on a LinkUp Systems
 400           L7200 Software Development Board which uses an ARM720T processor.
 401           Information on this board can be obtained at:
 402
 403           <http://www.linkupsys.com/>
 404
 405           If you have any questions or comments about the Linux kernel port
 406           to this board, send e-mail to <sjhill@cotw.com>.
 407
 408 config ARCH_KIRKWOOD
 409         bool "Marvell Kirkwood"
 410         select CPU_FEROCEON
 411         select PCI
 412         select GENERIC_GPIO
 413         select ARCH_REQUIRE_GPIOLIB
 414         select GENERIC_TIME
 415         select GENERIC_CLOCKEVENTS
 416         select PLAT_ORION
 417         help
 418           Support for the following Marvell Kirkwood series SoCs:
 419           88F6180, 88F6192 and 88F6281.
 420
 421 config ARCH_LOKI
 422         bool "Marvell Loki (88RC8480)"
 423         select CPU_FEROCEON
 424         select GENERIC_TIME
 425         select GENERIC_CLOCKEVENTS
 426         select PLAT_ORION
 427         help
 428           Support for the Marvell Loki (88RC8480) SoC.
 429
 430 config ARCH_MV78XX0
 431         bool "Marvell MV78xx0"
 432         select CPU_FEROCEON
 433         select PCI
 434         select GENERIC_GPIO
 435         select ARCH_REQUIRE_GPIOLIB
 436         select GENERIC_TIME
 437         select GENERIC_CLOCKEVENTS
 438         select PLAT_ORION
 439         help
 440           Support for the following Marvell MV78xx0 series SoCs:
 441           MV781x0, MV782x0.
 442
 443 config ARCH_ORION5X
 444         bool "Marvell Orion"
 445         depends on MMU
 446         select CPU_FEROCEON
 447         select PCI
 448         select GENERIC_GPIO
 449         select ARCH_REQUIRE_GPIOLIB
 450         select GENERIC_TIME
 451         select GENERIC_CLOCKEVENTS
 452         select PLAT_ORION
 453         help
 454           Support for the following Marvell Orion 5x series SoCs:
 455           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 456           Orion-2 (5281), Orion-1-90 (6183).
 457
 458 config ARCH_MMP
 459         bool "Marvell PXA168/910"
 460         depends on MMU
 461         select GENERIC_GPIO
 462         select ARCH_REQUIRE_GPIOLIB
 463         select HAVE_CLK
 464         select COMMON_CLKDEV
 465         select GENERIC_TIME
 466         select GENERIC_CLOCKEVENTS
 467         select TICK_ONESHOT
 468         select PLAT_PXA
 469         help
 470           Support for Marvell's PXA168/910 processor line.
 471
 472 config ARCH_KS8695
 473         bool "Micrel/Kendin KS8695"
 474         select CPU_ARM922T
 475         select GENERIC_GPIO
 476         select ARCH_REQUIRE_GPIOLIB
 477         help
 478           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 479           System-on-Chip devices.
 480
 481 config ARCH_NS9XXX
 482         bool "NetSilicon NS9xxx"
 483         select CPU_ARM926T
 484         select GENERIC_GPIO
 485         select GENERIC_TIME
 486         select GENERIC_CLOCKEVENTS
 487         select HAVE_CLK
 488         help
 489           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 490           System.
 491
 492           <http://www.digi.com/products/microprocessors/index.jsp>
 493
 494 config ARCH_W90X900
 495         bool "Nuvoton W90X900 CPU"
 496         select CPU_ARM926T
 497         select ARCH_REQUIRE_GPIOLIB
 498         select GENERIC_GPIO
 499         select COMMON_CLKDEV
 500         help
 501                 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
 502                 can login www.mcuos.com or www.nuvoton.com to know more.
 503
 504 config ARCH_PNX4008
 505         bool "Philips Nexperia PNX4008 Mobile"
 506         select CPU_ARM926T
 507         select HAVE_CLK
 508         help
 509           This enables support for Philips PNX4008 mobile platform.
 510
 511 config ARCH_PXA
 512         bool "PXA2xx/PXA3xx-based"
 513         depends on MMU
 514         select ARCH_MTD_XIP
 515         select GENERIC_GPIO
 516         select HAVE_CLK
 517         select COMMON_CLKDEV
 518         select ARCH_REQUIRE_GPIOLIB
 519         select GENERIC_TIME
 520         select GENERIC_CLOCKEVENTS
 521         select TICK_ONESHOT
 522         select PLAT_PXA
 523         help
 524           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 525
 526 config ARCH_MSM
 527         bool "Qualcomm MSM"
 528         select CPU_V6
 529         select GENERIC_TIME
 530         select GENERIC_CLOCKEVENTS
 531         help
 532           Support for Qualcomm MSM7K based systems.  This runs on the ARM11
 533           apps processor of the MSM7K and depends on a shared memory
 534           interface to the ARM9 modem processor which runs the baseband stack
 535           and controls some vital subsystems (clock and power control, etc).
 536
 537 config ARCH_RPC
 538         bool "RiscPC"
 539         select ARCH_ACORN
 540         select FIQ
 541         select TIMER_ACORN
 542         select ARCH_MAY_HAVE_PC_FDC
 543         select HAVE_PATA_PLATFORM
 544         select ISA_DMA_API
 545         select NO_IOPORT
 546         select ARCH_SPARSEMEM_ENABLE
 547         help
 548           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 549           CD-ROM interface, serial and parallel port, and the floppy drive.
 550
 551 config ARCH_SA1100
 552         bool "SA1100-based"
 553         select CPU_SA1100
 554         select ISA
 555         select ARCH_SPARSEMEM_ENABLE
 556         select ARCH_MTD_XIP
 557         select GENERIC_GPIO
 558         select GENERIC_TIME
 559         select GENERIC_CLOCKEVENTS
 560         select HAVE_CLK
 561         select TICK_ONESHOT
 562         select ARCH_REQUIRE_GPIOLIB
 563         help
 564           Support for StrongARM 11x0 based boards.
 565
 566 config ARCH_S3C2410
 567         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 568         select GENERIC_GPIO
 569         select HAVE_CLK
 570         help
 571           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 572           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 573           the Samsung SMDK2410 development board (and derivatives).
 574
 575 config ARCH_S3C64XX
 576         bool "Samsung S3C64XX"
 577         select GENERIC_GPIO
 578         select HAVE_CLK
 579         help
 580           Samsung S3C64XX series based systems
 581
 582 config ARCH_SHARK
 583         bool "Shark"
 584         select CPU_SA110
 585         select ISA
 586         select ISA_DMA
 587         select ZONE_DMA
 588         select PCI
 589         help
 590           Support for the StrongARM based Digital DNARD machine, also known
 591           as "Shark" (<http://www.shark-linux.de/shark.html>).
 592
 593 config ARCH_LH7A40X
 594         bool "Sharp LH7A40X"
 595         select CPU_ARM922T
 596         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 597         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 598         help
 599           Say Y here for systems based on one of the Sharp LH7A40X
 600           System on a Chip processors.  These CPUs include an ARM922T
 601           core with a wide array of integrated devices for
 602           hand-held and low-power applications.
 603
 604 config ARCH_U300
 605         bool "ST-Ericsson U300 Series"
 606         depends on MMU
 607         select CPU_ARM926T
 608         select ARM_AMBA
 609         select ARM_VIC
 610         select GENERIC_TIME
 611         select GENERIC_CLOCKEVENTS
 612         select HAVE_CLK
 613         select COMMON_CLKDEV
 614         select GENERIC_GPIO
 615         help
 616           Support for ST-Ericsson U300 series mobile platforms.
 617
 618 config ARCH_DAVINCI
 619         bool "TI DaVinci"
 620         select CPU_ARM926T
 621         select GENERIC_TIME
 622         select GENERIC_CLOCKEVENTS
 623         select GENERIC_GPIO
 624         select ARCH_REQUIRE_GPIOLIB
 625         select HAVE_CLK
 626         select ZONE_DMA
 627         select HAVE_IDE
 628         select COMMON_CLKDEV
 629         select GENERIC_ALLOCATOR
 630         help
 631           Support for TI's DaVinci platform.
 632
 633 config ARCH_OMAP
 634         bool "TI OMAP"
 635         select GENERIC_GPIO
 636         select HAVE_CLK
 637         select ARCH_REQUIRE_GPIOLIB
 638         select GENERIC_TIME
 639         select GENERIC_CLOCKEVENTS
 640         help
 641           Support for TI's OMAP platform (OMAP1 and OMAP2).
 642
 643 endchoice
 644
 645 source "arch/arm/mach-clps711x/Kconfig"
 646
 647 source "arch/arm/mach-ep93xx/Kconfig"
 648
 649 source "arch/arm/mach-footbridge/Kconfig"
 650
 651 source "arch/arm/mach-gemini/Kconfig"
 652
 653 source "arch/arm/mach-integrator/Kconfig"
 654
 655 source "arch/arm/mach-iop32x/Kconfig"
 656
 657 source "arch/arm/mach-iop33x/Kconfig"
 658
 659 source "arch/arm/mach-iop13xx/Kconfig"
 660
 661 source "arch/arm/mach-ixp4xx/Kconfig"
 662
 663 source "arch/arm/mach-ixp2000/Kconfig"
 664
 665 source "arch/arm/mach-ixp23xx/Kconfig"
 666
 667 source "arch/arm/mach-loki/Kconfig"
 668
 669 source "arch/arm/mach-mv78xx0/Kconfig"
 670
 671 source "arch/arm/mach-pxa/Kconfig"
 672 source "arch/arm/plat-pxa/Kconfig"
 673
 674 source "arch/arm/mach-mmp/Kconfig"
 675
 676 source "arch/arm/mach-sa1100/Kconfig"
 677
 678 source "arch/arm/plat-omap/Kconfig"
 679
 680 source "arch/arm/mach-omap1/Kconfig"
 681
 682 source "arch/arm/mach-omap2/Kconfig"
 683
 684 source "arch/arm/mach-orion5x/Kconfig"
 685
 686 source "arch/arm/mach-kirkwood/Kconfig"
 687
 688 source "arch/arm/plat-s3c24xx/Kconfig"
 689 source "arch/arm/plat-s3c64xx/Kconfig"
 690 source "arch/arm/plat-s3c/Kconfig"
 691
 692 if ARCH_S3C2410
 693 source "arch/arm/mach-s3c2400/Kconfig"
 694 source "arch/arm/mach-s3c2410/Kconfig"
 695 source "arch/arm/mach-s3c2412/Kconfig"
 696 source "arch/arm/mach-s3c2440/Kconfig"
 697 source "arch/arm/mach-s3c2442/Kconfig"
 698 source "arch/arm/mach-s3c2443/Kconfig"
 699 endif
 700
 701 if ARCH_S3C64XX
 702 source "arch/arm/mach-s3c6400/Kconfig"
 703 source "arch/arm/mach-s3c6410/Kconfig"
 704 endif
 705
 706 source "arch/arm/plat-stmp3xxx/Kconfig"
 707
 708 source "arch/arm/mach-lh7a40x/Kconfig"
 709
 710 source "arch/arm/mach-h720x/Kconfig"
 711
 712 source "arch/arm/mach-versatile/Kconfig"
 713
 714 source "arch/arm/mach-aaec2000/Kconfig"
 715
 716 source "arch/arm/mach-realview/Kconfig"
 717
 718 source "arch/arm/mach-at91/Kconfig"
 719
 720 source "arch/arm/plat-mxc/Kconfig"
 721
 722 source "arch/arm/mach-netx/Kconfig"
 723
 724 source "arch/arm/mach-ns9xxx/Kconfig"
 725
 726 source "arch/arm/mach-davinci/Kconfig"
 727
 728 source "arch/arm/mach-ks8695/Kconfig"
 729
 730 source "arch/arm/mach-msm/Kconfig"
 731
 732 source "arch/arm/mach-u300/Kconfig"
 733
 734 source "arch/arm/mach-w90x900/Kconfig"
 735
 736 # Definitions to make life easier
 737 config ARCH_ACORN
 738         bool
 739
 740 config PLAT_IOP
 741         bool
 742
 743 config PLAT_ORION
 744         bool
 745
 746 config PLAT_PXA
 747         bool
 748
 749 source arch/arm/mm/Kconfig
 750
 751 config IWMMXT
 752         bool "Enable iWMMXt support"
 753         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 754         default y if PXA27x || PXA3xx || ARCH_MMP
 755         help
 756           Enable support for iWMMXt context switching at run time if
 757           running on a CPU that supports it.
 758
 759 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 760 config XSCALE_PMU
 761         bool
 762         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 763         default y
 764
 765 if !MMU
 766 source "arch/arm/Kconfig-nommu"
 767 endif
 768
 769 config ARM_ERRATA_411920
 770         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 771         depends on CPU_V6 && !SMP
 772         help
 773           Invalidation of the Instruction Cache operation can
 774           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 775           It does not affect the MPCore. This option enables the ARM Ltd.
 776           recommended workaround.
 777
 778 config ARM_ERRATA_430973
 779         bool "ARM errata: Stale prediction on replaced interworking branch"
 780         depends on CPU_V7
 781         help
 782           This option enables the workaround for the 430973 Cortex-A8
 783           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 784           interworking branch is replaced with another code sequence at the
 785           same virtual address, whether due to self-modifying code or virtual
 786           to physical address re-mapping, Cortex-A8 does not recover from the
 787           stale interworking branch prediction. This results in Cortex-A8
 788           executing the new code sequence in the incorrect ARM or Thumb state.
 789           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 790           and also flushes the branch target cache at every context switch.
 791           Note that setting specific bits in the ACTLR register may not be
 792           available in non-secure mode.
 793
 794 config ARM_ERRATA_458693
 795         bool "ARM errata: Processor deadlock when a false hazard is created"
 796         depends on CPU_V7
 797         help
 798           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
 799           erratum. For very specific sequences of memory operations, it is
 800           possible for a hazard condition intended for a cache line to instead
 801           be incorrectly associated with a different cache line. This false
 802           hazard might then cause a processor deadlock. The workaround enables
 803           the L1 caching of the NEON accesses and disables the PLD instruction
 804           in the ACTLR register. Note that setting specific bits in the ACTLR
 805           register may not be available in non-secure mode.
 806
 807 config ARM_ERRATA_460075
 808         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
 809         depends on CPU_V7
 810         help
 811           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
 812           erratum. Any asynchronous access to the L2 cache may encounter a
 813           situation in which recent store transactions to the L2 cache are lost
 814           and overwritten with stale memory contents from external memory. The
 815           workaround disables the write-allocate mode for the L2 cache via the
 816           ACTLR register. Note that setting specific bits in the ACTLR register
 817           may not be available in non-secure mode.
 818
 819 endmenu
 820
 821 source "arch/arm/common/Kconfig"
 822
 823 config FORCE_MAX_ZONEORDER
 824         int
 825         depends on SA1111
 826         default "9"
 827
 828 menu "Bus support"
 829
 830 config ARM_AMBA
 831         bool
 832
 833 config ISA
 834         bool
 835         help
 836           Find out whether you have ISA slots on your motherboard.  ISA is the
 837           name of a bus system, i.e. the way the CPU talks to the other stuff
 838           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 839           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 840           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 841
 842 # Select ISA DMA controller support
 843 config ISA_DMA
 844         bool
 845         select ISA_DMA_API
 846
 847 # Select ISA DMA interface
 848 config ISA_DMA_API
 849         bool
 850
 851 config PCI
 852         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 853         help
 854           Find out whether you have a PCI motherboard. PCI is the name of a
 855           bus system, i.e. the way the CPU talks to the other stuff inside
 856           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 857           VESA. If you have PCI, say Y, otherwise N.
 858
 859 config PCI_SYSCALL
 860         def_bool PCI
 861
 862 # Select the host bridge type
 863 config PCI_HOST_VIA82C505
 864         bool
 865         depends on PCI && ARCH_SHARK
 866         default y
 867
 868 config PCI_HOST_ITE8152
 869         bool
 870         depends on PCI && MACH_ARMCORE
 871         default y
 872         select DMABOUNCE
 873
 874 source "drivers/pci/Kconfig"
 875
 876 source "drivers/pcmcia/Kconfig"
 877
 878 endmenu
 879
 880 menu "Kernel Features"
 881
 882 source "kernel/time/Kconfig"
 883
 884 config SMP
 885         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 886         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
 887                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
 888         depends on GENERIC_CLOCKEVENTS
 889         select USE_GENERIC_SMP_HELPERS
 890         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
 891         help
 892           This enables support for systems with more than one CPU. If you have
 893           a system with only one CPU, like most personal computers, say N. If
 894           you have a system with more than one CPU, say Y.
 895
 896           If you say N here, the kernel will run on single and multiprocessor
 897           machines, but will use only one CPU of a multiprocessor machine. If
 898           you say Y here, the kernel will run on many, but not all, single
 899           processor machines. On a single processor machine, the kernel will
 900           run faster if you say N here.
 901
 902           See also <file:Documentation/i386/IO-APIC.txt>,
 903           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 904           <http://www.linuxdoc.org/docs.html#howto>.
 905
 906           If you don't know what to do here, say N.
 907
 908 config HAVE_ARM_SCU
 909         bool
 910         depends on SMP
 911         help
 912           This option enables support for the ARM system coherency unit
 913
 914 config HAVE_ARM_TWD
 915         bool
 916         depends on SMP
 917         help
 918           This options enables support for the ARM timer and watchdog unit
 919
 920 choice
 921         prompt "Memory split"
 922         default VMSPLIT_3G
 923         help
 924           Select the desired split between kernel and user memory.
 925
 926           If you are not absolutely sure what you are doing, leave this
 927           option alone!
 928
 929         config VMSPLIT_3G
 930                 bool "3G/1G user/kernel split"
 931         config VMSPLIT_2G
 932                 bool "2G/2G user/kernel split"
 933         config VMSPLIT_1G
 934                 bool "1G/3G user/kernel split"
 935 endchoice
 936
 937 config PAGE_OFFSET
 938         hex
 939         default 0x40000000 if VMSPLIT_1G
 940         default 0x80000000 if VMSPLIT_2G
 941         default 0xC0000000
 942
 943 config NR_CPUS
 944         int "Maximum number of CPUs (2-32)"
 945         range 2 32
 946         depends on SMP
 947         default "4"
 948
 949 config HOTPLUG_CPU
 950         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 951         depends on SMP && HOTPLUG && EXPERIMENTAL
 952         help
 953           Say Y here to experiment with turning CPUs off and on.  CPUs
 954           can be controlled through /sys/devices/system/cpu.
 955
 956 config LOCAL_TIMERS
 957         bool "Use local timer interrupts"
 958         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
 959                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
 960         default y
 961         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
 962         help
 963           Enable support for local timers on SMP platforms, rather then the
 964           legacy IPI broadcast method.  Local timers allows the system
 965           accounting to be spread across the timer interval, preventing a
 966           "thundering herd" at every timer tick.
 967
 968 config PREEMPT
 969         bool "Preemptible Kernel (EXPERIMENTAL)"
 970         depends on EXPERIMENTAL
 971         help
 972           This option reduces the latency of the kernel when reacting to
 973           real-time or interactive events by allowing a low priority process to
 974           be preempted even if it is in kernel mode executing a system call.
 975           This allows applications to run more reliably even when the system is
 976           under load.
 977
 978           Say Y here if you are building a kernel for a desktop, embedded
 979           or real-time system.  Say N if you are unsure.
 980
 981 config HZ
 982         int
 983         default 128 if ARCH_L7200
 984         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 985         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 986         default AT91_TIMER_HZ if ARCH_AT91
 987         default 100
 988
 989 config THUMB2_KERNEL
 990         bool "Compile the kernel in Thumb-2 mode"
 991         depends on CPU_V7 && EXPERIMENTAL
 992         select AEABI
 993         select ARM_ASM_UNIFIED
 994         help
 995           By enabling this option, the kernel will be compiled in
 996           Thumb-2 mode. A compiler/assembler that understand the unified
 997           ARM-Thumb syntax is needed.
 998
 999           If unsure, say N.
1000
1001 config ARM_ASM_UNIFIED
1002         bool
1003
1004 config AEABI
1005         bool "Use the ARM EABI to compile the kernel"
1006         help
1007           This option allows for the kernel to be compiled using the latest
1008           ARM ABI (aka EABI).  This is only useful if you are using a user
1009           space environment that is also compiled with EABI.
1010
1011           Since there are major incompatibilities between the legacy ABI and
1012           EABI, especially with regard to structure member alignment, this
1013           option also changes the kernel syscall calling convention to
1014           disambiguate both ABIs and allow for backward compatibility support
1015           (selected with CONFIG_OABI_COMPAT).
1016
1017           To use this you need GCC version 4.0.0 or later.
1018
1019 config OABI_COMPAT
1020         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1021         depends on AEABI && EXPERIMENTAL
1022         default y
1023         help
1024           This option preserves the old syscall interface along with the
1025           new (ARM EABI) one. It also provides a compatibility layer to
1026           intercept syscalls that have structure arguments which layout
1027           in memory differs between the legacy ABI and the new ARM EABI
1028           (only for non "thumb" binaries). This option adds a tiny
1029           overhead to all syscalls and produces a slightly larger kernel.
1030           If you know you'll be using only pure EABI user space then you
1031           can say N here. If this option is not selected and you attempt
1032           to execute a legacy ABI binary then the result will be
1033           UNPREDICTABLE (in fact it can be predicted that it won't work
1034           at all). If in doubt say Y.
1035
1036 config ARCH_HAS_HOLES_MEMORYMODEL
1037         bool
1038
1039 # Discontigmem is deprecated
1040 config ARCH_DISCONTIGMEM_ENABLE
1041         bool
1042
1043 config ARCH_SPARSEMEM_ENABLE
1044         bool
1045
1046 config ARCH_SPARSEMEM_DEFAULT
1047         def_bool ARCH_SPARSEMEM_ENABLE
1048
1049 config ARCH_SELECT_MEMORY_MODEL
1050         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1051
1052 config NODES_SHIFT
1053         int
1054         default "4" if ARCH_LH7A40X
1055         default "2"
1056         depends on NEED_MULTIPLE_NODES
1057
1058 config HIGHMEM
1059         bool "High Memory Support (EXPERIMENTAL)"
1060         depends on MMU && EXPERIMENTAL
1061         help
1062           The address space of ARM processors is only 4 Gigabytes large
1063           and it has to accommodate user address space, kernel address
1064           space as well as some memory mapped IO. That means that, if you
1065           have a large amount of physical memory and/or IO, not all of the
1066           memory can be "permanently mapped" by the kernel. The physical
1067           memory that is not permanently mapped is called "high memory".
1068
1069           Depending on the selected kernel/user memory split, minimum
1070           vmalloc space and actual amount of RAM, you may not need this
1071           option which should result in a slightly faster kernel.
1072
1073           If unsure, say n.
1074
1075 source "mm/Kconfig"
1076
1077 config LEDS
1078         bool "Timer and CPU usage LEDs"
1079         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1080                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1081                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1082                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1083                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1084                    ARCH_AT91 || ARCH_DAVINCI || \
1085                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1086         help
1087           If you say Y here, the LEDs on your machine will be used
1088           to provide useful information about your current system status.
1089
1090           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1091           be able to select which LEDs are active using the options below. If
1092           you are compiling a kernel for the EBSA-110 or the LART however, the
1093           red LED will simply flash regularly to indicate that the system is
1094           still functional. It is safe to say Y here if you have a CATS
1095           system, but the driver will do nothing.
1096
1097 config LEDS_TIMER
1098         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1099                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1100                             || MACH_OMAP_PERSEUS2
1101         depends on LEDS
1102         depends on !GENERIC_CLOCKEVENTS
1103         default y if ARCH_EBSA110
1104         help
1105           If you say Y here, one of the system LEDs (the green one on the
1106           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1107           will flash regularly to indicate that the system is still
1108           operational. This is mainly useful to kernel hackers who are
1109           debugging unstable kernels.
1110
1111           The LART uses the same LED for both Timer LED and CPU usage LED
1112           functions. You may choose to use both, but the Timer LED function
1113           will overrule the CPU usage LED.
1114
1115 config LEDS_CPU
1116         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1117                         !ARCH_OMAP) \
1118                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1119                         || MACH_OMAP_PERSEUS2
1120         depends on LEDS
1121         help
1122           If you say Y here, the red LED will be used to give a good real
1123           time indication of CPU usage, by lighting whenever the idle task
1124           is not currently executing.
1125
1126           The LART uses the same LED for both Timer LED and CPU usage LED
1127           functions. You may choose to use both, but the Timer LED function
1128           will overrule the CPU usage LED.
1129
1130 config ALIGNMENT_TRAP
1131         bool
1132         depends on CPU_CP15_MMU
1133         default y if !ARCH_EBSA110
1134         help
1135           ARM processors cannot fetch/store information which is not
1136           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1137           address divisible by 4. On 32-bit ARM processors, these non-aligned
1138           fetch/store instructions will be emulated in software if you say
1139           here, which has a severe performance impact. This is necessary for
1140           correct operation of some network protocols. With an IP-only
1141           configuration it is safe to say N, otherwise say Y.
1142
1143 config UACCESS_WITH_MEMCPY
1144         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1145         depends on MMU && EXPERIMENTAL
1146         default y if CPU_FEROCEON
1147         help
1148           Implement faster copy_to_user and clear_user methods for CPU
1149           cores where a 8-word STM instruction give significantly higher
1150           memory write throughput than a sequence of individual 32bit stores.
1151
1152           A possible side effect is a slight increase in scheduling latency
1153           between threads sharing the same address space if they invoke
1154           such copy operations with large buffers.
1155
1156           However, if the CPU data cache is using a write-allocate mode,
1157           this option is unlikely to provide any performance gain.
1158
1159 endmenu
1160
1161 menu "Boot options"
1162
1163 # Compressed boot loader in ROM.  Yes, we really want to ask about
1164 # TEXT and BSS so we preserve their values in the config files.
1165 config ZBOOT_ROM_TEXT
1166         hex "Compressed ROM boot loader base address"
1167         default "0"
1168         help
1169           The physical address at which the ROM-able zImage is to be
1170           placed in the target.  Platforms which normally make use of
1171           ROM-able zImage formats normally set this to a suitable
1172           value in their defconfig file.
1173
1174           If ZBOOT_ROM is not enabled, this has no effect.
1175
1176 config ZBOOT_ROM_BSS
1177         hex "Compressed ROM boot loader BSS address"
1178         default "0"
1179         help
1180           The base address of an area of read/write memory in the target
1181           for the ROM-able zImage which must be available while the
1182           decompressor is running. It must be large enough to hold the
1183           entire decompressed kernel plus an additional 128 KiB.
1184           Platforms which normally make use of ROM-able zImage formats
1185           normally set this to a suitable value in their defconfig file.
1186
1187           If ZBOOT_ROM is not enabled, this has no effect.
1188
1189 config ZBOOT_ROM
1190         bool "Compressed boot loader in ROM/flash"
1191         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1192         help
1193           Say Y here if you intend to execute your compressed kernel image
1194           (zImage) directly from ROM or flash.  If unsure, say N.
1195
1196 config CMDLINE
1197         string "Default kernel command string"
1198         default ""
1199         help
1200           On some architectures (EBSA110 and CATS), there is currently no way
1201           for the boot loader to pass arguments to the kernel. For these
1202           architectures, you should supply some command-line options at build
1203           time by entering them here. As a minimum, you should specify the
1204           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1205
1206 config XIP_KERNEL
1207         bool "Kernel Execute-In-Place from ROM"
1208         depends on !ZBOOT_ROM
1209         help
1210           Execute-In-Place allows the kernel to run from non-volatile storage
1211           directly addressable by the CPU, such as NOR flash. This saves RAM
1212           space since the text section of the kernel is not loaded from flash
1213           to RAM.  Read-write sections, such as the data section and stack,
1214           are still copied to RAM.  The XIP kernel is not compressed since
1215           it has to run directly from flash, so it will take more space to
1216           store it.  The flash address used to link the kernel object files,
1217           and for storing it, is configuration dependent. Therefore, if you
1218           say Y here, you must know the proper physical address where to
1219           store the kernel image depending on your own flash memory usage.
1220
1221           Also note that the make target becomes "make xipImage" rather than
1222           "make zImage" or "make Image".  The final kernel binary to put in
1223           ROM memory will be arch/arm/boot/xipImage.
1224
1225           If unsure, say N.
1226
1227 config XIP_PHYS_ADDR
1228         hex "XIP Kernel Physical Location"
1229         depends on XIP_KERNEL
1230         default "0x00080000"
1231         help
1232           This is the physical address in your flash memory the kernel will
1233           be linked for and stored to.  This address is dependent on your
1234           own flash usage.
1235
1236 config KEXEC
1237         bool "Kexec system call (EXPERIMENTAL)"
1238         depends on EXPERIMENTAL
1239         help
1240           kexec is a system call that implements the ability to shutdown your
1241           current kernel, and to start another kernel.  It is like a reboot
1242           but it is independent of the system firmware.   And like a reboot
1243           you can start any kernel with it, not just Linux.
1244
1245           It is an ongoing process to be certain the hardware in a machine
1246           is properly shutdown, so do not be surprised if this code does not
1247           initially work for you.  It may help to enable device hotplugging
1248           support.
1249
1250 config ATAGS_PROC
1251         bool "Export atags in procfs"
1252         depends on KEXEC
1253         default y
1254         help
1255           Should the atags used to boot the kernel be exported in an "atags"
1256           file in procfs. Useful with kexec.
1257
1258 endmenu
1259
1260 menu "CPU Power Management"
1261
1262 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_PXA || ARCH_S3C64XX)
1263
1264 source "drivers/cpufreq/Kconfig"
1265
1266 config CPU_FREQ_SA1100
1267         bool
1268         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1269         default y
1270
1271 config CPU_FREQ_SA1110
1272         bool
1273         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1274         default y
1275
1276 config CPU_FREQ_INTEGRATOR
1277         tristate "CPUfreq driver for ARM Integrator CPUs"
1278         depends on ARCH_INTEGRATOR && CPU_FREQ
1279         default y
1280         help
1281           This enables the CPUfreq driver for ARM Integrator CPUs.
1282
1283           For details, take a look at <file:Documentation/cpu-freq>.
1284
1285           If in doubt, say Y.
1286
1287 config CPU_FREQ_PXA
1288         bool
1289         depends on CPU_FREQ && ARCH_PXA && PXA25x
1290         default y
1291         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1292
1293 config CPU_FREQ_S3C64XX
1294         bool "CPUfreq support for Samsung S3C64XX CPUs"
1295         depends on CPU_FREQ && CPU_S3C6410
1296
1297 endif
1298
1299 source "drivers/cpuidle/Kconfig"
1300
1301 endmenu
1302
1303 menu "Floating point emulation"
1304
1305 comment "At least one emulation must be selected"
1306
1307 config FPE_NWFPE
1308         bool "NWFPE math emulation"
1309         depends on !AEABI || OABI_COMPAT
1310         ---help---
1311           Say Y to include the NWFPE floating point emulator in the kernel.
1312           This is necessary to run most binaries. Linux does not currently
1313           support floating point hardware so you need to say Y here even if
1314           your machine has an FPA or floating point co-processor podule.
1315
1316           You may say N here if you are going to load the Acorn FPEmulator
1317           early in the bootup.
1318
1319 config FPE_NWFPE_XP
1320         bool "Support extended precision"
1321         depends on FPE_NWFPE
1322         help
1323           Say Y to include 80-bit support in the kernel floating-point
1324           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1325           Note that gcc does not generate 80-bit operations by default,
1326           so in most cases this option only enlarges the size of the
1327           floating point emulator without any good reason.
1328
1329           You almost surely want to say N here.
1330
1331 config FPE_FASTFPE
1332         bool "FastFPE math emulation (EXPERIMENTAL)"
1333         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1334         ---help---
1335           Say Y here to include the FAST floating point emulator in the kernel.
1336           This is an experimental much faster emulator which now also has full
1337           precision for the mantissa.  It does not support any exceptions.
1338           It is very simple, and approximately 3-6 times faster than NWFPE.
1339
1340           It should be sufficient for most programs.  It may be not suitable
1341           for scientific calculations, but you have to check this for yourself.
1342           If you do not feel you need a faster FP emulation you should better
1343           choose NWFPE.
1344
1345 config VFP
1346         bool "VFP-format floating point maths"
1347         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1348         help
1349           Say Y to include VFP support code in the kernel. This is needed
1350           if your hardware includes a VFP unit.
1351
1352           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1353           release notes and additional status information.
1354
1355           Say N if your target does not have VFP hardware.
1356
1357 config VFPv3
1358         bool
1359         depends on VFP
1360         default y if CPU_V7
1361
1362 config NEON
1363         bool "Advanced SIMD (NEON) Extension support"
1364         depends on VFPv3 && CPU_V7
1365         help
1366           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1367           Extension.
1368
1369 endmenu
1370
1371 menu "Userspace binary formats"
1372
1373 source "fs/Kconfig.binfmt"
1374
1375 config ARTHUR
1376         tristate "RISC OS personality"
1377         depends on !AEABI
1378         help
1379           Say Y here to include the kernel code necessary if you want to run
1380           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1381           experimental; if this sounds frightening, say N and sleep in peace.
1382           You can also say M here to compile this support as a module (which
1383           will be called arthur).
1384
1385 endmenu
1386
1387 menu "Power management options"
1388
1389 source "kernel/power/Kconfig"
1390
1391 config ARCH_SUSPEND_POSSIBLE
1392         def_bool y
1393
1394 endmenu
1395
1396 source "net/Kconfig"
1397
1398 menu "Device Drivers"
1399
1400 source "drivers/base/Kconfig"
1401
1402 source "drivers/connector/Kconfig"
1403
1404 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1405 source "drivers/mtd/Kconfig"
1406 endif
1407
1408 source "drivers/parport/Kconfig"
1409
1410 source "drivers/pnp/Kconfig"
1411
1412 source "drivers/block/Kconfig"
1413
1414 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1415
1416 source "drivers/misc/Kconfig"
1417
1418 source "drivers/ide/Kconfig"
1419
1420 source "drivers/scsi/Kconfig"
1421
1422 source "drivers/ata/Kconfig"
1423
1424 source "drivers/md/Kconfig"
1425
1426 source "drivers/message/fusion/Kconfig"
1427
1428 source "drivers/ieee1394/Kconfig"
1429
1430 source "drivers/message/i2o/Kconfig"
1431
1432 source "drivers/net/Kconfig"
1433
1434 source "drivers/isdn/Kconfig"
1435
1436 # input before char - char/joystick depends on it. As does USB.
1437
1438 source "drivers/input/Kconfig"
1439
1440 source "drivers/char/Kconfig"
1441
1442 source "drivers/i2c/Kconfig"
1443
1444 source "drivers/spi/Kconfig"
1445
1446 source "drivers/gpio/Kconfig"
1447
1448 source "drivers/w1/Kconfig"
1449
1450 source "drivers/power/Kconfig"
1451
1452 source "drivers/hwmon/Kconfig"
1453
1454 source "drivers/thermal/Kconfig"
1455
1456 source "drivers/watchdog/Kconfig"
1457
1458 source "drivers/ssb/Kconfig"
1459
1460 #source "drivers/l3/Kconfig"
1461
1462 source "drivers/mfd/Kconfig"
1463
1464 source "drivers/media/Kconfig"
1465
1466 source "drivers/video/Kconfig"
1467
1468 source "sound/Kconfig"
1469
1470 source "drivers/hid/Kconfig"
1471
1472 source "drivers/usb/Kconfig"
1473
1474 source "drivers/uwb/Kconfig"
1475
1476 source "drivers/mmc/Kconfig"
1477
1478 source "drivers/memstick/Kconfig"
1479
1480 source "drivers/accessibility/Kconfig"
1481
1482 source "drivers/leds/Kconfig"
1483
1484 source "drivers/rtc/Kconfig"
1485
1486 source "drivers/dma/Kconfig"
1487
1488 source "drivers/dca/Kconfig"
1489
1490 source "drivers/auxdisplay/Kconfig"
1491
1492 source "drivers/regulator/Kconfig"
1493
1494 source "drivers/uio/Kconfig"
1495
1496 source "drivers/staging/Kconfig"
1497
1498 endmenu
1499
1500 source "fs/Kconfig"
1501
1502 source "arch/arm/Kconfig.debug"
1503
1504 source "security/Kconfig"
1505
1506 source "crypto/Kconfig"
1507
1508 source "lib/Kconfig"