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         select HAVE_KERNEL_GZIP
  22         select HAVE_KERNEL_LZO
  23         help
  24           The ARM series is a line of low-power-consumption RISC chip designs
  25           licensed by ARM Ltd and targeted at embedded applications and
  26           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  27           manufactured, but legacy ARM-based PC hardware remains popular in
  28           Europe.  There is an ARM Linux project with a web page at
  29           <http://www.arm.linux.org.uk/>.
  30
  31 config HAVE_PWM
  32         bool
  33
  34 config SYS_SUPPORTS_APM_EMULATION
  35         bool
  36
  37 config GENERIC_GPIO
  38         bool
  39
  40 config GENERIC_TIME
  41         bool
  42
  43 config GENERIC_CLOCKEVENTS
  44         bool
  45
  46 config GENERIC_CLOCKEVENTS_BROADCAST
  47         bool
  48         depends on GENERIC_CLOCKEVENTS
  49         default y if SMP && !LOCAL_TIMERS
  50
  51 config HAVE_TCM
  52         bool
  53         select GENERIC_ALLOCATOR
  54
  55 config NO_IOPORT
  56         bool
  57
  58 config EISA
  59         bool
  60         ---help---
  61           The Extended Industry Standard Architecture (EISA) bus was
  62           developed as an open alternative to the IBM MicroChannel bus.
  63
  64           The EISA bus provided some of the features of the IBM MicroChannel
  65           bus while maintaining backward compatibility with cards made for
  66           the older ISA bus.  The EISA bus saw limited use between 1988 and
  67           1995 when it was made obsolete by the PCI bus.
  68
  69           Say Y here if you are building a kernel for an EISA-based machine.
  70
  71           Otherwise, say N.
  72
  73 config SBUS
  74         bool
  75
  76 config MCA
  77         bool
  78         help
  79           MicroChannel Architecture is found in some IBM PS/2 machines and
  80           laptops.  It is a bus system similar to PCI or ISA. See
  81           <file:Documentation/mca.txt> (and especially the web page given
  82           there) before attempting to build an MCA bus kernel.
  83
  84 config GENERIC_HARDIRQS
  85         bool
  86         default y
  87
  88 config STACKTRACE_SUPPORT
  89         bool
  90         default y
  91
  92 config HAVE_LATENCYTOP_SUPPORT
  93         bool
  94         depends on !SMP
  95         default y
  96
  97 config LOCKDEP_SUPPORT
  98         bool
  99         default y
 100
 101 config TRACE_IRQFLAGS_SUPPORT
 102         bool
 103         default y
 104
 105 config HARDIRQS_SW_RESEND
 106         bool
 107         default y
 108
 109 config GENERIC_IRQ_PROBE
 110         bool
 111         default y
 112
 113 config GENERIC_LOCKBREAK
 114         bool
 115         default y
 116         depends on SMP && PREEMPT
 117
 118 config RWSEM_GENERIC_SPINLOCK
 119         bool
 120         default y
 121
 122 config RWSEM_XCHGADD_ALGORITHM
 123         bool
 124
 125 config ARCH_HAS_ILOG2_U32
 126         bool
 127
 128 config ARCH_HAS_ILOG2_U64
 129         bool
 130
 131 config ARCH_HAS_CPUFREQ
 132         bool
 133         help
 134           Internal node to signify that the ARCH has CPUFREQ support
 135           and that the relevant menu configurations are displayed for
 136           it.
 137
 138 config GENERIC_HWEIGHT
 139         bool
 140         default y
 141
 142 config GENERIC_CALIBRATE_DELAY
 143         bool
 144         default y
 145
 146 config ARCH_MAY_HAVE_PC_FDC
 147         bool
 148
 149 config ZONE_DMA
 150         bool
 151
 152 config GENERIC_ISA_DMA
 153         bool
 154
 155 config FIQ
 156         bool
 157
 158 config ARCH_MTD_XIP
 159         bool
 160
 161 config GENERIC_HARDIRQS_NO__DO_IRQ
 162         def_bool y
 163
 164 if OPROFILE
 165
 166 config OPROFILE_ARMV6
 167         def_bool y
 168         depends on CPU_V6 && !SMP
 169         select OPROFILE_ARM11_CORE
 170
 171 config OPROFILE_MPCORE
 172         def_bool y
 173         depends on CPU_V6 && SMP
 174         select OPROFILE_ARM11_CORE
 175
 176 config OPROFILE_ARM11_CORE
 177         bool
 178
 179 config OPROFILE_ARMV7
 180         def_bool y
 181         depends on CPU_V7 && !SMP
 182         bool
 183
 184 endif
 185
 186 config VECTORS_BASE
 187         hex
 188         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 189         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 190         default 0x00000000
 191         help
 192           The base address of exception vectors.
 193
 194 source "init/Kconfig"
 195
 196 source "kernel/Kconfig.freezer"
 197
 198 menu "System Type"
 199
 200 config MMU
 201         bool "MMU-based Paged Memory Management Support"
 202         default y
 203         help
 204           Select if you want MMU-based virtualised addressing space
 205           support by paged memory management. If unsure, say 'Y'.
 206
 207 choice
 208         prompt "ARM system type"
 209         default ARCH_VERSATILE
 210
 211 config ARCH_AAEC2000
 212         bool "Agilent AAEC-2000 based"
 213         select CPU_ARM920T
 214         select ARM_AMBA
 215         select HAVE_CLK
 216         help
 217           This enables support for systems based on the Agilent AAEC-2000
 218
 219 config ARCH_INTEGRATOR
 220         bool "ARM Ltd. Integrator family"
 221         select ARM_AMBA
 222         select ARCH_HAS_CPUFREQ
 223         select HAVE_CLK
 224         select COMMON_CLKDEV
 225         select ICST525
 226         help
 227           Support for ARM's Integrator platform.
 228
 229 config ARCH_REALVIEW
 230         bool "ARM Ltd. RealView family"
 231         select ARM_AMBA
 232         select HAVE_CLK
 233         select COMMON_CLKDEV
 234         select ICST307
 235         select GENERIC_TIME
 236         select GENERIC_CLOCKEVENTS
 237         select ARCH_WANT_OPTIONAL_GPIOLIB
 238         help
 239           This enables support for ARM Ltd RealView boards.
 240
 241 config ARCH_VERSATILE
 242         bool "ARM Ltd. Versatile family"
 243         select ARM_AMBA
 244         select ARM_VIC
 245         select HAVE_CLK
 246         select COMMON_CLKDEV
 247         select ICST307
 248         select GENERIC_TIME
 249         select GENERIC_CLOCKEVENTS
 250         select ARCH_WANT_OPTIONAL_GPIOLIB
 251         help
 252           This enables support for ARM Ltd Versatile board.
 253
 254 config ARCH_AT91
 255         bool "Atmel AT91"
 256         select GENERIC_GPIO
 257         select ARCH_REQUIRE_GPIOLIB
 258         select HAVE_CLK
 259         help
 260           This enables support for systems based on the Atmel AT91RM9200,
 261           AT91SAM9 and AT91CAP9 processors.
 262
 263 config ARCH_CLPS711X
 264         bool "Cirrus Logic CLPS711x/EP721x-based"
 265         select CPU_ARM720T
 266         help
 267           Support for Cirrus Logic 711x/721x based boards.
 268
 269 config ARCH_GEMINI
 270         bool "Cortina Systems Gemini"
 271         select CPU_FA526
 272         select GENERIC_GPIO
 273         select ARCH_REQUIRE_GPIOLIB
 274         help
 275           Support for the Cortina Systems Gemini family SoCs
 276
 277 config ARCH_EBSA110
 278         bool "EBSA-110"
 279         select CPU_SA110
 280         select ISA
 281         select NO_IOPORT
 282         help
 283           This is an evaluation board for the StrongARM processor available
 284           from Digital. It has limited hardware on-board, including an
 285           Ethernet interface, two PCMCIA sockets, two serial ports and a
 286           parallel port.
 287
 288 config ARCH_EP93XX
 289         bool "EP93xx-based"
 290         select CPU_ARM920T
 291         select ARM_AMBA
 292         select ARM_VIC
 293         select GENERIC_GPIO
 294         select HAVE_CLK
 295         select COMMON_CLKDEV
 296         select ARCH_REQUIRE_GPIOLIB
 297         select ARCH_HAS_HOLES_MEMORYMODEL
 298         help
 299           This enables support for the Cirrus EP93xx series of CPUs.
 300
 301 config ARCH_FOOTBRIDGE
 302         bool "FootBridge"
 303         select CPU_SA110
 304         select FOOTBRIDGE
 305         help
 306           Support for systems based on the DC21285 companion chip
 307           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 308
 309 config ARCH_MXC
 310         bool "Freescale MXC/iMX-based"
 311         select GENERIC_TIME
 312         select GENERIC_CLOCKEVENTS
 313         select ARCH_MTD_XIP
 314         select GENERIC_GPIO
 315         select ARCH_REQUIRE_GPIOLIB
 316         select HAVE_CLK
 317         help
 318           Support for Freescale MXC/iMX-based family of processors
 319
 320 config ARCH_STMP3XXX
 321         bool "Freescale STMP3xxx"
 322         select CPU_ARM926T
 323         select HAVE_CLK
 324         select COMMON_CLKDEV
 325         select ARCH_REQUIRE_GPIOLIB
 326         select GENERIC_TIME
 327         select GENERIC_CLOCKEVENTS
 328         select GENERIC_GPIO
 329         select USB_ARCH_HAS_EHCI
 330         help
 331           Support for systems based on the Freescale 3xxx CPUs.
 332
 333 config ARCH_NETX
 334         bool "Hilscher NetX based"
 335         select CPU_ARM926T
 336         select ARM_VIC
 337         select GENERIC_CLOCKEVENTS
 338         select GENERIC_TIME
 339         help
 340           This enables support for systems based on the Hilscher NetX Soc
 341
 342 config ARCH_H720X
 343         bool "Hynix HMS720x-based"
 344         select CPU_ARM720T
 345         select ISA_DMA_API
 346         help
 347           This enables support for systems based on the Hynix HMS720x
 348
 349 config ARCH_NOMADIK
 350         bool "STMicroelectronics Nomadik"
 351         select ARM_AMBA
 352         select ARM_VIC
 353         select CPU_ARM926T
 354         select HAVE_CLK
 355         select COMMON_CLKDEV
 356         select GENERIC_TIME
 357         select GENERIC_CLOCKEVENTS
 358         select GENERIC_GPIO
 359         select ARCH_REQUIRE_GPIOLIB
 360         help
 361           Support for the Nomadik platform by ST-Ericsson
 362
 363 config ARCH_IOP13XX
 364         bool "IOP13xx-based"
 365         depends on MMU
 366         select CPU_XSC3
 367         select PLAT_IOP
 368         select PCI
 369         select ARCH_SUPPORTS_MSI
 370         select VMSPLIT_1G
 371         help
 372           Support for Intel's IOP13XX (XScale) family of processors.
 373
 374 config ARCH_IOP32X
 375         bool "IOP32x-based"
 376         depends on MMU
 377         select CPU_XSCALE
 378         select PLAT_IOP
 379         select PCI
 380         select GENERIC_GPIO
 381         select ARCH_REQUIRE_GPIOLIB
 382         help
 383           Support for Intel's 80219 and IOP32X (XScale) family of
 384           processors.
 385
 386 config ARCH_IOP33X
 387         bool "IOP33x-based"
 388         depends on MMU
 389         select CPU_XSCALE
 390         select PLAT_IOP
 391         select PCI
 392         select GENERIC_GPIO
 393         select ARCH_REQUIRE_GPIOLIB
 394         help
 395           Support for Intel's IOP33X (XScale) family of processors.
 396
 397 config ARCH_IXP23XX
 398         bool "IXP23XX-based"
 399         depends on MMU
 400         select CPU_XSC3
 401         select PCI
 402         help
 403           Support for Intel's IXP23xx (XScale) family of processors.
 404
 405 config ARCH_IXP2000
 406         bool "IXP2400/2800-based"
 407         depends on MMU
 408         select CPU_XSCALE
 409         select PCI
 410         help
 411           Support for Intel's IXP2400/2800 (XScale) family of processors.
 412
 413 config ARCH_IXP4XX
 414         bool "IXP4xx-based"
 415         depends on MMU
 416         select CPU_XSCALE
 417         select GENERIC_GPIO
 418         select GENERIC_TIME
 419         select GENERIC_CLOCKEVENTS
 420         select DMABOUNCE if PCI
 421         help
 422           Support for Intel's IXP4XX (XScale) family of processors.
 423
 424 config ARCH_L7200
 425         bool "LinkUp-L7200"
 426         select CPU_ARM720T
 427         select FIQ
 428         help
 429           Say Y here if you intend to run this kernel on a LinkUp Systems
 430           L7200 Software Development Board which uses an ARM720T processor.
 431           Information on this board can be obtained at:
 432
 433           <http://www.linkupsys.com/>
 434
 435           If you have any questions or comments about the Linux kernel port
 436           to this board, send e-mail to <sjhill@cotw.com>.
 437
 438 config ARCH_DOVE
 439         bool "Marvell Dove"
 440         select PCI
 441         select GENERIC_GPIO
 442         select ARCH_REQUIRE_GPIOLIB
 443         select GENERIC_TIME
 444         select GENERIC_CLOCKEVENTS
 445         select PLAT_ORION
 446         help
 447           Support for the Marvell Dove SoC 88AP510
 448
 449 config ARCH_KIRKWOOD
 450         bool "Marvell Kirkwood"
 451         select CPU_FEROCEON
 452         select PCI
 453         select GENERIC_GPIO
 454         select ARCH_REQUIRE_GPIOLIB
 455         select GENERIC_TIME
 456         select GENERIC_CLOCKEVENTS
 457         select PLAT_ORION
 458         help
 459           Support for the following Marvell Kirkwood series SoCs:
 460           88F6180, 88F6192 and 88F6281.
 461
 462 config ARCH_LOKI
 463         bool "Marvell Loki (88RC8480)"
 464         select CPU_FEROCEON
 465         select GENERIC_TIME
 466         select GENERIC_CLOCKEVENTS
 467         select PLAT_ORION
 468         help
 469           Support for the Marvell Loki (88RC8480) SoC.
 470
 471 config ARCH_MV78XX0
 472         bool "Marvell MV78xx0"
 473         select CPU_FEROCEON
 474         select PCI
 475         select GENERIC_GPIO
 476         select ARCH_REQUIRE_GPIOLIB
 477         select GENERIC_TIME
 478         select GENERIC_CLOCKEVENTS
 479         select PLAT_ORION
 480         help
 481           Support for the following Marvell MV78xx0 series SoCs:
 482           MV781x0, MV782x0.
 483
 484 config ARCH_ORION5X
 485         bool "Marvell Orion"
 486         depends on MMU
 487         select CPU_FEROCEON
 488         select PCI
 489         select GENERIC_GPIO
 490         select ARCH_REQUIRE_GPIOLIB
 491         select GENERIC_TIME
 492         select GENERIC_CLOCKEVENTS
 493         select PLAT_ORION
 494         help
 495           Support for the following Marvell Orion 5x series SoCs:
 496           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 497           Orion-2 (5281), Orion-1-90 (6183).
 498
 499 config ARCH_MMP
 500         bool "Marvell PXA168/910"
 501         depends on MMU
 502         select GENERIC_GPIO
 503         select ARCH_REQUIRE_GPIOLIB
 504         select HAVE_CLK
 505         select COMMON_CLKDEV
 506         select GENERIC_TIME
 507         select GENERIC_CLOCKEVENTS
 508         select TICK_ONESHOT
 509         select PLAT_PXA
 510         help
 511           Support for Marvell's PXA168/910 processor line.
 512
 513 config ARCH_KS8695
 514         bool "Micrel/Kendin KS8695"
 515         select CPU_ARM922T
 516         select GENERIC_GPIO
 517         select ARCH_REQUIRE_GPIOLIB
 518         help
 519           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 520           System-on-Chip devices.
 521
 522 config ARCH_NS9XXX
 523         bool "NetSilicon NS9xxx"
 524         select CPU_ARM926T
 525         select GENERIC_GPIO
 526         select GENERIC_TIME
 527         select GENERIC_CLOCKEVENTS
 528         select HAVE_CLK
 529         help
 530           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 531           System.
 532
 533           <http://www.digi.com/products/microprocessors/index.jsp>
 534
 535 config ARCH_W90X900
 536         bool "Nuvoton W90X900 CPU"
 537         select CPU_ARM926T
 538         select ARCH_REQUIRE_GPIOLIB
 539         select GENERIC_GPIO
 540         select HAVE_CLK
 541         select COMMON_CLKDEV
 542         select GENERIC_TIME
 543         select GENERIC_CLOCKEVENTS
 544         help
 545           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 546           At present, the w90x900 has been renamed nuc900, regarding
 547           the ARM series product line, you can login the following
 548           link address to know more.
 549
 550           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 551                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 552
 553 config ARCH_PNX4008
 554         bool "Philips Nexperia PNX4008 Mobile"
 555         select CPU_ARM926T
 556         select HAVE_CLK
 557         help
 558           This enables support for Philips PNX4008 mobile platform.
 559
 560 config ARCH_PXA
 561         bool "PXA2xx/PXA3xx-based"
 562         depends on MMU
 563         select ARCH_MTD_XIP
 564         select ARCH_HAS_CPUFREQ
 565         select GENERIC_GPIO
 566         select HAVE_CLK
 567         select COMMON_CLKDEV
 568         select ARCH_REQUIRE_GPIOLIB
 569         select GENERIC_TIME
 570         select GENERIC_CLOCKEVENTS
 571         select TICK_ONESHOT
 572         select PLAT_PXA
 573         help
 574           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 575
 576 config ARCH_MSM
 577         bool "Qualcomm MSM"
 578         select CPU_V6
 579         select GENERIC_TIME
 580         select GENERIC_CLOCKEVENTS
 581         help
 582           Support for Qualcomm MSM7K based systems.  This runs on the ARM11
 583           apps processor of the MSM7K and depends on a shared memory
 584           interface to the ARM9 modem processor which runs the baseband stack
 585           and controls some vital subsystems (clock and power control, etc).
 586
 587 config ARCH_RPC
 588         bool "RiscPC"
 589         select ARCH_ACORN
 590         select FIQ
 591         select TIMER_ACORN
 592         select ARCH_MAY_HAVE_PC_FDC
 593         select HAVE_PATA_PLATFORM
 594         select ISA_DMA_API
 595         select NO_IOPORT
 596         select ARCH_SPARSEMEM_ENABLE
 597         help
 598           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 599           CD-ROM interface, serial and parallel port, and the floppy drive.
 600
 601 config ARCH_SA1100
 602         bool "SA1100-based"
 603         select CPU_SA1100
 604         select ISA
 605         select ARCH_SPARSEMEM_ENABLE
 606         select ARCH_MTD_XIP
 607         select ARCH_HAS_CPUFREQ
 608         select CPU_FREQ
 609         select GENERIC_GPIO
 610         select GENERIC_TIME
 611         select GENERIC_CLOCKEVENTS
 612         select HAVE_CLK
 613         select TICK_ONESHOT
 614         select ARCH_REQUIRE_GPIOLIB
 615         help
 616           Support for StrongARM 11x0 based boards.
 617
 618 config ARCH_S3C2410
 619         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 620         select GENERIC_GPIO
 621         select ARCH_HAS_CPUFREQ
 622         select HAVE_CLK
 623         help
 624           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 625           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 626           the Samsung SMDK2410 development board (and derivatives).
 627
 628 config ARCH_S3C64XX
 629         bool "Samsung S3C64XX"
 630         select GENERIC_GPIO
 631         select HAVE_CLK
 632         select ARCH_HAS_CPUFREQ
 633         help
 634           Samsung S3C64XX series based systems
 635
 636 config ARCH_S5PC1XX
 637         bool "Samsung S5PC1XX"
 638         select GENERIC_GPIO
 639         select HAVE_CLK
 640         select CPU_V7
 641         help
 642           Samsung S5PC1XX series based systems
 643
 644 config ARCH_SHARK
 645         bool "Shark"
 646         select CPU_SA110
 647         select ISA
 648         select ISA_DMA
 649         select ZONE_DMA
 650         select PCI
 651         help
 652           Support for the StrongARM based Digital DNARD machine, also known
 653           as "Shark" (<http://www.shark-linux.de/shark.html>).
 654
 655 config ARCH_LH7A40X
 656         bool "Sharp LH7A40X"
 657         select CPU_ARM922T
 658         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 659         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 660         help
 661           Say Y here for systems based on one of the Sharp LH7A40X
 662           System on a Chip processors.  These CPUs include an ARM922T
 663           core with a wide array of integrated devices for
 664           hand-held and low-power applications.
 665
 666 config ARCH_U300
 667         bool "ST-Ericsson U300 Series"
 668         depends on MMU
 669         select CPU_ARM926T
 670         select HAVE_TCM
 671         select ARM_AMBA
 672         select ARM_VIC
 673         select GENERIC_TIME
 674         select GENERIC_CLOCKEVENTS
 675         select HAVE_CLK
 676         select COMMON_CLKDEV
 677         select GENERIC_GPIO
 678         help
 679           Support for ST-Ericsson U300 series mobile platforms.
 680
 681 config ARCH_DAVINCI
 682         bool "TI DaVinci"
 683         select CPU_ARM926T
 684         select GENERIC_TIME
 685         select GENERIC_CLOCKEVENTS
 686         select GENERIC_GPIO
 687         select ARCH_REQUIRE_GPIOLIB
 688         select HAVE_CLK
 689         select ZONE_DMA
 690         select HAVE_IDE
 691         select COMMON_CLKDEV
 692         select GENERIC_ALLOCATOR
 693         select ARCH_HAS_HOLES_MEMORYMODEL
 694         help
 695           Support for TI's DaVinci platform.
 696
 697 config ARCH_OMAP
 698         bool "TI OMAP"
 699         select GENERIC_GPIO
 700         select HAVE_CLK
 701         select ARCH_REQUIRE_GPIOLIB
 702         select ARCH_HAS_CPUFREQ
 703         select GENERIC_TIME
 704         select GENERIC_CLOCKEVENTS
 705         help
 706           Support for TI's OMAP platform (OMAP1 and OMAP2).
 707
 708 config ARCH_BCMRING
 709         bool "Broadcom BCMRING"
 710         depends on MMU
 711         select CPU_V6
 712         select ARM_AMBA
 713         select COMMON_CLKDEV
 714         select GENERIC_TIME
 715         select GENERIC_CLOCKEVENTS
 716         select ARCH_WANT_OPTIONAL_GPIOLIB
 717         help
 718           Support for Broadcom's BCMRing platform.
 719
 720 config ARCH_U8500
 721         bool "ST-Ericsson U8500 Series"
 722         select CPU_V7
 723         select ARM_AMBA
 724         select GENERIC_TIME
 725         select GENERIC_CLOCKEVENTS
 726         select COMMON_CLKDEV
 727         help
 728           Support for ST-Ericsson's Ux500 architecture
 729
 730 endchoice
 731
 732 source "arch/arm/mach-clps711x/Kconfig"
 733
 734 source "arch/arm/mach-ep93xx/Kconfig"
 735
 736 source "arch/arm/mach-footbridge/Kconfig"
 737
 738 source "arch/arm/mach-gemini/Kconfig"
 739
 740 source "arch/arm/mach-integrator/Kconfig"
 741
 742 source "arch/arm/mach-iop32x/Kconfig"
 743
 744 source "arch/arm/mach-iop33x/Kconfig"
 745
 746 source "arch/arm/mach-iop13xx/Kconfig"
 747
 748 source "arch/arm/mach-ixp4xx/Kconfig"
 749
 750 source "arch/arm/mach-ixp2000/Kconfig"
 751
 752 source "arch/arm/mach-ixp23xx/Kconfig"
 753
 754 source "arch/arm/mach-loki/Kconfig"
 755
 756 source "arch/arm/mach-mv78xx0/Kconfig"
 757
 758 source "arch/arm/mach-pxa/Kconfig"
 759 source "arch/arm/plat-pxa/Kconfig"
 760
 761 source "arch/arm/mach-mmp/Kconfig"
 762
 763 source "arch/arm/mach-sa1100/Kconfig"
 764
 765 source "arch/arm/plat-omap/Kconfig"
 766
 767 source "arch/arm/mach-omap1/Kconfig"
 768
 769 source "arch/arm/mach-omap2/Kconfig"
 770
 771 source "arch/arm/mach-orion5x/Kconfig"
 772
 773 source "arch/arm/mach-kirkwood/Kconfig"
 774
 775 source "arch/arm/mach-dove/Kconfig"
 776
 777 source "arch/arm/plat-samsung/Kconfig"
 778 source "arch/arm/plat-s3c24xx/Kconfig"
 779 source "arch/arm/plat-s3c64xx/Kconfig"
 780 source "arch/arm/plat-s3c/Kconfig"
 781 source "arch/arm/plat-s5pc1xx/Kconfig"
 782
 783 if ARCH_S3C2410
 784 source "arch/arm/mach-s3c2400/Kconfig"
 785 source "arch/arm/mach-s3c2410/Kconfig"
 786 source "arch/arm/mach-s3c2412/Kconfig"
 787 source "arch/arm/mach-s3c2440/Kconfig"
 788 source "arch/arm/mach-s3c2442/Kconfig"
 789 source "arch/arm/mach-s3c2443/Kconfig"
 790 endif
 791
 792 if ARCH_S3C64XX
 793 source "arch/arm/mach-s3c6400/Kconfig"
 794 source "arch/arm/mach-s3c6410/Kconfig"
 795 endif
 796
 797 source "arch/arm/plat-stmp3xxx/Kconfig"
 798
 799 if ARCH_S5PC1XX
 800 source "arch/arm/mach-s5pc100/Kconfig"
 801 endif
 802
 803 source "arch/arm/mach-lh7a40x/Kconfig"
 804
 805 source "arch/arm/mach-h720x/Kconfig"
 806
 807 source "arch/arm/mach-versatile/Kconfig"
 808
 809 source "arch/arm/mach-aaec2000/Kconfig"
 810
 811 source "arch/arm/mach-realview/Kconfig"
 812
 813 source "arch/arm/mach-at91/Kconfig"
 814
 815 source "arch/arm/plat-mxc/Kconfig"
 816
 817 source "arch/arm/mach-nomadik/Kconfig"
 818 source "arch/arm/plat-nomadik/Kconfig"
 819
 820 source "arch/arm/mach-netx/Kconfig"
 821
 822 source "arch/arm/mach-ns9xxx/Kconfig"
 823
 824 source "arch/arm/mach-davinci/Kconfig"
 825
 826 source "arch/arm/mach-ks8695/Kconfig"
 827
 828 source "arch/arm/mach-msm/Kconfig"
 829
 830 source "arch/arm/mach-u300/Kconfig"
 831
 832 source "arch/arm/mach-w90x900/Kconfig"
 833
 834 source "arch/arm/mach-bcmring/Kconfig"
 835
 836 source "arch/arm/mach-ux500/Kconfig"
 837
 838 # Definitions to make life easier
 839 config ARCH_ACORN
 840         bool
 841
 842 config PLAT_IOP
 843         bool
 844         select GENERIC_CLOCKEVENTS
 845         select GENERIC_TIME
 846
 847 config PLAT_ORION
 848         bool
 849
 850 config PLAT_PXA
 851         bool
 852
 853 source arch/arm/mm/Kconfig
 854
 855 config IWMMXT
 856         bool "Enable iWMMXt support"
 857         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 858         default y if PXA27x || PXA3xx || ARCH_MMP
 859         help
 860           Enable support for iWMMXt context switching at run time if
 861           running on a CPU that supports it.
 862
 863 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 864 config XSCALE_PMU
 865         bool
 866         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 867         default y
 868
 869 if !MMU
 870 source "arch/arm/Kconfig-nommu"
 871 endif
 872
 873 config ARM_ERRATA_411920
 874         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 875         depends on CPU_V6 && !SMP
 876         help
 877           Invalidation of the Instruction Cache operation can
 878           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 879           It does not affect the MPCore. This option enables the ARM Ltd.
 880           recommended workaround.
 881
 882 config ARM_ERRATA_430973
 883         bool "ARM errata: Stale prediction on replaced interworking branch"
 884         depends on CPU_V7
 885         help
 886           This option enables the workaround for the 430973 Cortex-A8
 887           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 888           interworking branch is replaced with another code sequence at the
 889           same virtual address, whether due to self-modifying code or virtual
 890           to physical address re-mapping, Cortex-A8 does not recover from the
 891           stale interworking branch prediction. This results in Cortex-A8
 892           executing the new code sequence in the incorrect ARM or Thumb state.
 893           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 894           and also flushes the branch target cache at every context switch.
 895           Note that setting specific bits in the ACTLR register may not be
 896           available in non-secure mode.
 897
 898 config ARM_ERRATA_458693
 899         bool "ARM errata: Processor deadlock when a false hazard is created"
 900         depends on CPU_V7
 901         help
 902           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
 903           erratum. For very specific sequences of memory operations, it is
 904           possible for a hazard condition intended for a cache line to instead
 905           be incorrectly associated with a different cache line. This false
 906           hazard might then cause a processor deadlock. The workaround enables
 907           the L1 caching of the NEON accesses and disables the PLD instruction
 908           in the ACTLR register. Note that setting specific bits in the ACTLR
 909           register may not be available in non-secure mode.
 910
 911 config ARM_ERRATA_460075
 912         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
 913         depends on CPU_V7
 914         help
 915           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
 916           erratum. Any asynchronous access to the L2 cache may encounter a
 917           situation in which recent store transactions to the L2 cache are lost
 918           and overwritten with stale memory contents from external memory. The
 919           workaround disables the write-allocate mode for the L2 cache via the
 920           ACTLR register. Note that setting specific bits in the ACTLR register
 921           may not be available in non-secure mode.
 922
 923 endmenu
 924
 925 source "arch/arm/common/Kconfig"
 926
 927 config FORCE_MAX_ZONEORDER
 928         int
 929         depends on SA1111
 930         default "9"
 931
 932 menu "Bus support"
 933
 934 config ARM_AMBA
 935         bool
 936
 937 config ISA
 938         bool
 939         help
 940           Find out whether you have ISA slots on your motherboard.  ISA is the
 941           name of a bus system, i.e. the way the CPU talks to the other stuff
 942           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 943           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 944           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 945
 946 # Select ISA DMA controller support
 947 config ISA_DMA
 948         bool
 949         select ISA_DMA_API
 950
 951 # Select ISA DMA interface
 952 config ISA_DMA_API
 953         bool
 954
 955 config PCI
 956         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 957         help
 958           Find out whether you have a PCI motherboard. PCI is the name of a
 959           bus system, i.e. the way the CPU talks to the other stuff inside
 960           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 961           VESA. If you have PCI, say Y, otherwise N.
 962
 963 config PCI_SYSCALL
 964         def_bool PCI
 965
 966 # Select the host bridge type
 967 config PCI_HOST_VIA82C505
 968         bool
 969         depends on PCI && ARCH_SHARK
 970         default y
 971
 972 config PCI_HOST_ITE8152
 973         bool
 974         depends on PCI && MACH_ARMCORE
 975         default y
 976         select DMABOUNCE
 977
 978 source "drivers/pci/Kconfig"
 979
 980 source "drivers/pcmcia/Kconfig"
 981
 982 endmenu
 983
 984 menu "Kernel Features"
 985
 986 source "kernel/time/Kconfig"
 987
 988 config SMP
 989         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 990         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
 991                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
 992         depends on GENERIC_CLOCKEVENTS
 993         select USE_GENERIC_SMP_HELPERS
 994         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
 995         help
 996           This enables support for systems with more than one CPU. If you have
 997           a system with only one CPU, like most personal computers, say N. If
 998           you have a system with more than one CPU, say Y.
 999
1000           If you say N here, the kernel will run on single and multiprocessor
1001           machines, but will use only one CPU of a multiprocessor machine. If
1002           you say Y here, the kernel will run on many, but not all, single
1003           processor machines. On a single processor machine, the kernel will
1004           run faster if you say N here.
1005
1006           See also <file:Documentation/i386/IO-APIC.txt>,
1007           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1008           <http://www.linuxdoc.org/docs.html#howto>.
1009
1010           If you don't know what to do here, say N.
1011
1012 config HAVE_ARM_SCU
1013         bool
1014         depends on SMP
1015         help
1016           This option enables support for the ARM system coherency unit
1017
1018 config HAVE_ARM_TWD
1019         bool
1020         depends on SMP
1021         help
1022           This options enables support for the ARM timer and watchdog unit
1023
1024 choice
1025         prompt "Memory split"
1026         default VMSPLIT_3G
1027         help
1028           Select the desired split between kernel and user memory.
1029
1030           If you are not absolutely sure what you are doing, leave this
1031           option alone!
1032
1033         config VMSPLIT_3G
1034                 bool "3G/1G user/kernel split"
1035         config VMSPLIT_2G
1036                 bool "2G/2G user/kernel split"
1037         config VMSPLIT_1G
1038                 bool "1G/3G user/kernel split"
1039 endchoice
1040
1041 config PAGE_OFFSET
1042         hex
1043         default 0x40000000 if VMSPLIT_1G
1044         default 0x80000000 if VMSPLIT_2G
1045         default 0xC0000000
1046
1047 config NR_CPUS
1048         int "Maximum number of CPUs (2-32)"
1049         range 2 32
1050         depends on SMP
1051         default "4"
1052
1053 config HOTPLUG_CPU
1054         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1055         depends on SMP && HOTPLUG && EXPERIMENTAL
1056         help
1057           Say Y here to experiment with turning CPUs off and on.  CPUs
1058           can be controlled through /sys/devices/system/cpu.
1059
1060 config LOCAL_TIMERS
1061         bool "Use local timer interrupts"
1062         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1063                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1064         default y
1065         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1066         help
1067           Enable support for local timers on SMP platforms, rather then the
1068           legacy IPI broadcast method.  Local timers allows the system
1069           accounting to be spread across the timer interval, preventing a
1070           "thundering herd" at every timer tick.
1071
1072 source kernel/Kconfig.preempt
1073
1074 config HZ
1075         int
1076         default 128 if ARCH_L7200
1077         default 200 if ARCH_EBSA110 || ARCH_S3C2410
1078         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1079         default AT91_TIMER_HZ if ARCH_AT91
1080         default 100
1081
1082 config THUMB2_KERNEL
1083         bool "Compile the kernel in Thumb-2 mode"
1084         depends on CPU_V7 && EXPERIMENTAL
1085         select AEABI
1086         select ARM_ASM_UNIFIED
1087         help
1088           By enabling this option, the kernel will be compiled in
1089           Thumb-2 mode. A compiler/assembler that understand the unified
1090           ARM-Thumb syntax is needed.
1091
1092           If unsure, say N.
1093
1094 config ARM_ASM_UNIFIED
1095         bool
1096
1097 config AEABI
1098         bool "Use the ARM EABI to compile the kernel"
1099         help
1100           This option allows for the kernel to be compiled using the latest
1101           ARM ABI (aka EABI).  This is only useful if you are using a user
1102           space environment that is also compiled with EABI.
1103
1104           Since there are major incompatibilities between the legacy ABI and
1105           EABI, especially with regard to structure member alignment, this
1106           option also changes the kernel syscall calling convention to
1107           disambiguate both ABIs and allow for backward compatibility support
1108           (selected with CONFIG_OABI_COMPAT).
1109
1110           To use this you need GCC version 4.0.0 or later.
1111
1112 config OABI_COMPAT
1113         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1114         depends on AEABI && EXPERIMENTAL
1115         default y
1116         help
1117           This option preserves the old syscall interface along with the
1118           new (ARM EABI) one. It also provides a compatibility layer to
1119           intercept syscalls that have structure arguments which layout
1120           in memory differs between the legacy ABI and the new ARM EABI
1121           (only for non "thumb" binaries). This option adds a tiny
1122           overhead to all syscalls and produces a slightly larger kernel.
1123           If you know you'll be using only pure EABI user space then you
1124           can say N here. If this option is not selected and you attempt
1125           to execute a legacy ABI binary then the result will be
1126           UNPREDICTABLE (in fact it can be predicted that it won't work
1127           at all). If in doubt say Y.
1128
1129 config ARCH_HAS_HOLES_MEMORYMODEL
1130         bool
1131
1132 # Discontigmem is deprecated
1133 config ARCH_DISCONTIGMEM_ENABLE
1134         bool
1135
1136 config ARCH_SPARSEMEM_ENABLE
1137         bool
1138
1139 config ARCH_SPARSEMEM_DEFAULT
1140         def_bool ARCH_SPARSEMEM_ENABLE
1141
1142 config ARCH_SELECT_MEMORY_MODEL
1143         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1144
1145 config NODES_SHIFT
1146         int
1147         default "4" if ARCH_LH7A40X
1148         default "2"
1149         depends on NEED_MULTIPLE_NODES
1150
1151 config HIGHMEM
1152         bool "High Memory Support (EXPERIMENTAL)"
1153         depends on MMU && EXPERIMENTAL
1154         help
1155           The address space of ARM processors is only 4 Gigabytes large
1156           and it has to accommodate user address space, kernel address
1157           space as well as some memory mapped IO. That means that, if you
1158           have a large amount of physical memory and/or IO, not all of the
1159           memory can be "permanently mapped" by the kernel. The physical
1160           memory that is not permanently mapped is called "high memory".
1161
1162           Depending on the selected kernel/user memory split, minimum
1163           vmalloc space and actual amount of RAM, you may not need this
1164           option which should result in a slightly faster kernel.
1165
1166           If unsure, say n.
1167
1168 config HIGHPTE
1169         bool "Allocate 2nd-level pagetables from highmem"
1170         depends on HIGHMEM
1171         depends on !OUTER_CACHE
1172
1173 source "mm/Kconfig"
1174
1175 config LEDS
1176         bool "Timer and CPU usage LEDs"
1177         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1178                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1179                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1180                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1181                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1182                    ARCH_AT91 || ARCH_DAVINCI || \
1183                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1184         help
1185           If you say Y here, the LEDs on your machine will be used
1186           to provide useful information about your current system status.
1187
1188           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1189           be able to select which LEDs are active using the options below. If
1190           you are compiling a kernel for the EBSA-110 or the LART however, the
1191           red LED will simply flash regularly to indicate that the system is
1192           still functional. It is safe to say Y here if you have a CATS
1193           system, but the driver will do nothing.
1194
1195 config LEDS_TIMER
1196         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1197                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1198                             || MACH_OMAP_PERSEUS2
1199         depends on LEDS
1200         depends on !GENERIC_CLOCKEVENTS
1201         default y if ARCH_EBSA110
1202         help
1203           If you say Y here, one of the system LEDs (the green one on the
1204           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1205           will flash regularly to indicate that the system is still
1206           operational. This is mainly useful to kernel hackers who are
1207           debugging unstable kernels.
1208
1209           The LART uses the same LED for both Timer LED and CPU usage LED
1210           functions. You may choose to use both, but the Timer LED function
1211           will overrule the CPU usage LED.
1212
1213 config LEDS_CPU
1214         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1215                         !ARCH_OMAP) \
1216                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1217                         || MACH_OMAP_PERSEUS2
1218         depends on LEDS
1219         help
1220           If you say Y here, the red LED will be used to give a good real
1221           time indication of CPU usage, by lighting whenever the idle task
1222           is not currently executing.
1223
1224           The LART uses the same LED for both Timer LED and CPU usage LED
1225           functions. You may choose to use both, but the Timer LED function
1226           will overrule the CPU usage LED.
1227
1228 config ALIGNMENT_TRAP
1229         bool
1230         depends on CPU_CP15_MMU
1231         default y if !ARCH_EBSA110
1232         help
1233           ARM processors cannot fetch/store information which is not
1234           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1235           address divisible by 4. On 32-bit ARM processors, these non-aligned
1236           fetch/store instructions will be emulated in software if you say
1237           here, which has a severe performance impact. This is necessary for
1238           correct operation of some network protocols. With an IP-only
1239           configuration it is safe to say N, otherwise say Y.
1240
1241 config UACCESS_WITH_MEMCPY
1242         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1243         depends on MMU && EXPERIMENTAL
1244         default y if CPU_FEROCEON
1245         help
1246           Implement faster copy_to_user and clear_user methods for CPU
1247           cores where a 8-word STM instruction give significantly higher
1248           memory write throughput than a sequence of individual 32bit stores.
1249
1250           A possible side effect is a slight increase in scheduling latency
1251           between threads sharing the same address space if they invoke
1252           such copy operations with large buffers.
1253
1254           However, if the CPU data cache is using a write-allocate mode,
1255           this option is unlikely to provide any performance gain.
1256
1257 endmenu
1258
1259 menu "Boot options"
1260
1261 # Compressed boot loader in ROM.  Yes, we really want to ask about
1262 # TEXT and BSS so we preserve their values in the config files.
1263 config ZBOOT_ROM_TEXT
1264         hex "Compressed ROM boot loader base address"
1265         default "0"
1266         help
1267           The physical address at which the ROM-able zImage is to be
1268           placed in the target.  Platforms which normally make use of
1269           ROM-able zImage formats normally set this to a suitable
1270           value in their defconfig file.
1271
1272           If ZBOOT_ROM is not enabled, this has no effect.
1273
1274 config ZBOOT_ROM_BSS
1275         hex "Compressed ROM boot loader BSS address"
1276         default "0"
1277         help
1278           The base address of an area of read/write memory in the target
1279           for the ROM-able zImage which must be available while the
1280           decompressor is running. It must be large enough to hold the
1281           entire decompressed kernel plus an additional 128 KiB.
1282           Platforms which normally make use of ROM-able zImage formats
1283           normally set this to a suitable value in their defconfig file.
1284
1285           If ZBOOT_ROM is not enabled, this has no effect.
1286
1287 config ZBOOT_ROM
1288         bool "Compressed boot loader in ROM/flash"
1289         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1290         help
1291           Say Y here if you intend to execute your compressed kernel image
1292           (zImage) directly from ROM or flash.  If unsure, say N.
1293
1294 config CMDLINE
1295         string "Default kernel command string"
1296         default ""
1297         help
1298           On some architectures (EBSA110 and CATS), there is currently no way
1299           for the boot loader to pass arguments to the kernel. For these
1300           architectures, you should supply some command-line options at build
1301           time by entering them here. As a minimum, you should specify the
1302           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1303
1304 config XIP_KERNEL
1305         bool "Kernel Execute-In-Place from ROM"
1306         depends on !ZBOOT_ROM
1307         help
1308           Execute-In-Place allows the kernel to run from non-volatile storage
1309           directly addressable by the CPU, such as NOR flash. This saves RAM
1310           space since the text section of the kernel is not loaded from flash
1311           to RAM.  Read-write sections, such as the data section and stack,
1312           are still copied to RAM.  The XIP kernel is not compressed since
1313           it has to run directly from flash, so it will take more space to
1314           store it.  The flash address used to link the kernel object files,
1315           and for storing it, is configuration dependent. Therefore, if you
1316           say Y here, you must know the proper physical address where to
1317           store the kernel image depending on your own flash memory usage.
1318
1319           Also note that the make target becomes "make xipImage" rather than
1320           "make zImage" or "make Image".  The final kernel binary to put in
1321           ROM memory will be arch/arm/boot/xipImage.
1322
1323           If unsure, say N.
1324
1325 config XIP_PHYS_ADDR
1326         hex "XIP Kernel Physical Location"
1327         depends on XIP_KERNEL
1328         default "0x00080000"
1329         help
1330           This is the physical address in your flash memory the kernel will
1331           be linked for and stored to.  This address is dependent on your
1332           own flash usage.
1333
1334 config KEXEC
1335         bool "Kexec system call (EXPERIMENTAL)"
1336         depends on EXPERIMENTAL
1337         help
1338           kexec is a system call that implements the ability to shutdown your
1339           current kernel, and to start another kernel.  It is like a reboot
1340           but it is independent of the system firmware.   And like a reboot
1341           you can start any kernel with it, not just Linux.
1342
1343           It is an ongoing process to be certain the hardware in a machine
1344           is properly shutdown, so do not be surprised if this code does not
1345           initially work for you.  It may help to enable device hotplugging
1346           support.
1347
1348 config ATAGS_PROC
1349         bool "Export atags in procfs"
1350         depends on KEXEC
1351         default y
1352         help
1353           Should the atags used to boot the kernel be exported in an "atags"
1354           file in procfs. Useful with kexec.
1355
1356 endmenu
1357
1358 menu "CPU Power Management"
1359
1360 if ARCH_HAS_CPUFREQ
1361
1362 source "drivers/cpufreq/Kconfig"
1363
1364 config CPU_FREQ_SA1100
1365         bool
1366
1367 config CPU_FREQ_SA1110
1368         bool
1369
1370 config CPU_FREQ_INTEGRATOR
1371         tristate "CPUfreq driver for ARM Integrator CPUs"
1372         depends on ARCH_INTEGRATOR && CPU_FREQ
1373         default y
1374         help
1375           This enables the CPUfreq driver for ARM Integrator CPUs.
1376
1377           For details, take a look at <file:Documentation/cpu-freq>.
1378
1379           If in doubt, say Y.
1380
1381 config CPU_FREQ_PXA
1382         bool
1383         depends on CPU_FREQ && ARCH_PXA && PXA25x
1384         default y
1385         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1386
1387 config CPU_FREQ_S3C64XX
1388         bool "CPUfreq support for Samsung S3C64XX CPUs"
1389         depends on CPU_FREQ && CPU_S3C6410
1390
1391 config CPU_FREQ_S3C
1392         bool
1393         help
1394           Internal configuration node for common cpufreq on Samsung SoC
1395
1396 config CPU_FREQ_S3C24XX
1397         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1398         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1399         select CPU_FREQ_S3C
1400         help
1401           This enables the CPUfreq driver for the Samsung S3C24XX family
1402           of CPUs.
1403
1404           For details, take a look at <file:Documentation/cpu-freq>.
1405
1406           If in doubt, say N.
1407
1408 config CPU_FREQ_S3C24XX_PLL
1409         bool "Support CPUfreq changing of PLL frequency"
1410         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1411         help
1412           Compile in support for changing the PLL frequency from the
1413           S3C24XX series CPUfreq driver. The PLL takes time to settle
1414           after a frequency change, so by default it is not enabled.
1415
1416           This also means that the PLL tables for the selected CPU(s) will
1417           be built which may increase the size of the kernel image.
1418
1419 config CPU_FREQ_S3C24XX_DEBUG
1420         bool "Debug CPUfreq Samsung driver core"
1421         depends on CPU_FREQ_S3C24XX
1422         help
1423           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1424
1425 config CPU_FREQ_S3C24XX_IODEBUG
1426         bool "Debug CPUfreq Samsung driver IO timing"
1427         depends on CPU_FREQ_S3C24XX
1428         help
1429           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1430
1431 config CPU_FREQ_S3C24XX_DEBUGFS
1432         bool "Export debugfs for CPUFreq"
1433         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1434         help
1435           Export status information via debugfs.
1436
1437 endif
1438
1439 source "drivers/cpuidle/Kconfig"
1440
1441 endmenu
1442
1443 menu "Floating point emulation"
1444
1445 comment "At least one emulation must be selected"
1446
1447 config FPE_NWFPE
1448         bool "NWFPE math emulation"
1449         depends on !AEABI || OABI_COMPAT
1450         ---help---
1451           Say Y to include the NWFPE floating point emulator in the kernel.
1452           This is necessary to run most binaries. Linux does not currently
1453           support floating point hardware so you need to say Y here even if
1454           your machine has an FPA or floating point co-processor podule.
1455
1456           You may say N here if you are going to load the Acorn FPEmulator
1457           early in the bootup.
1458
1459 config FPE_NWFPE_XP
1460         bool "Support extended precision"
1461         depends on FPE_NWFPE
1462         help
1463           Say Y to include 80-bit support in the kernel floating-point
1464           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1465           Note that gcc does not generate 80-bit operations by default,
1466           so in most cases this option only enlarges the size of the
1467           floating point emulator without any good reason.
1468
1469           You almost surely want to say N here.
1470
1471 config FPE_FASTFPE
1472         bool "FastFPE math emulation (EXPERIMENTAL)"
1473         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1474         ---help---
1475           Say Y here to include the FAST floating point emulator in the kernel.
1476           This is an experimental much faster emulator which now also has full
1477           precision for the mantissa.  It does not support any exceptions.
1478           It is very simple, and approximately 3-6 times faster than NWFPE.
1479
1480           It should be sufficient for most programs.  It may be not suitable
1481           for scientific calculations, but you have to check this for yourself.
1482           If you do not feel you need a faster FP emulation you should better
1483           choose NWFPE.
1484
1485 config VFP
1486         bool "VFP-format floating point maths"
1487         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1488         help
1489           Say Y to include VFP support code in the kernel. This is needed
1490           if your hardware includes a VFP unit.
1491
1492           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1493           release notes and additional status information.
1494
1495           Say N if your target does not have VFP hardware.
1496
1497 config VFPv3
1498         bool
1499         depends on VFP
1500         default y if CPU_V7
1501
1502 config NEON
1503         bool "Advanced SIMD (NEON) Extension support"
1504         depends on VFPv3 && CPU_V7
1505         help
1506           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1507           Extension.
1508
1509 endmenu
1510
1511 menu "Userspace binary formats"
1512
1513 source "fs/Kconfig.binfmt"
1514
1515 config ARTHUR
1516         tristate "RISC OS personality"
1517         depends on !AEABI
1518         help
1519           Say Y here to include the kernel code necessary if you want to run
1520           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1521           experimental; if this sounds frightening, say N and sleep in peace.
1522           You can also say M here to compile this support as a module (which
1523           will be called arthur).
1524
1525 endmenu
1526
1527 menu "Power management options"
1528
1529 source "kernel/power/Kconfig"
1530
1531 config ARCH_SUSPEND_POSSIBLE
1532         def_bool y
1533
1534 endmenu
1535
1536 source "net/Kconfig"
1537
1538 source "drivers/Kconfig"
1539
1540 source "fs/Kconfig"
1541
1542 source "arch/arm/Kconfig.debug"
1543
1544 source "security/Kconfig"
1545
1546 source "crypto/Kconfig"
1547
1548 source "lib/Kconfig"