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         select ARCH_HAS_HOLES_MEMORYMODEL
 706         help
 707           Support for TI's OMAP platform (OMAP1 and OMAP2).
 708
 709 config ARCH_BCMRING
 710         bool "Broadcom BCMRING"
 711         depends on MMU
 712         select CPU_V6
 713         select ARM_AMBA
 714         select COMMON_CLKDEV
 715         select GENERIC_TIME
 716         select GENERIC_CLOCKEVENTS
 717         select ARCH_WANT_OPTIONAL_GPIOLIB
 718         help
 719           Support for Broadcom's BCMRing platform.
 720
 721 config ARCH_U8500
 722         bool "ST-Ericsson U8500 Series"
 723         select CPU_V7
 724         select ARM_AMBA
 725         select GENERIC_TIME
 726         select GENERIC_CLOCKEVENTS
 727         select COMMON_CLKDEV
 728         help
 729           Support for ST-Ericsson's Ux500 architecture
 730
 731 endchoice
 732
 733 source "arch/arm/mach-aaec2000/Kconfig"
 734
 735 source "arch/arm/mach-at91/Kconfig"
 736
 737 source "arch/arm/mach-bcmring/Kconfig"
 738
 739 source "arch/arm/mach-clps711x/Kconfig"
 740
 741 source "arch/arm/mach-davinci/Kconfig"
 742
 743 source "arch/arm/mach-dove/Kconfig"
 744
 745 source "arch/arm/mach-ep93xx/Kconfig"
 746
 747 source "arch/arm/mach-footbridge/Kconfig"
 748
 749 source "arch/arm/mach-gemini/Kconfig"
 750
 751 source "arch/arm/mach-h720x/Kconfig"
 752
 753 source "arch/arm/mach-integrator/Kconfig"
 754
 755 source "arch/arm/mach-iop32x/Kconfig"
 756
 757 source "arch/arm/mach-iop33x/Kconfig"
 758
 759 source "arch/arm/mach-iop13xx/Kconfig"
 760
 761 source "arch/arm/mach-ixp4xx/Kconfig"
 762
 763 source "arch/arm/mach-ixp2000/Kconfig"
 764
 765 source "arch/arm/mach-ixp23xx/Kconfig"
 766
 767 source "arch/arm/mach-kirkwood/Kconfig"
 768
 769 source "arch/arm/mach-ks8695/Kconfig"
 770
 771 source "arch/arm/mach-lh7a40x/Kconfig"
 772
 773 source "arch/arm/mach-loki/Kconfig"
 774
 775 source "arch/arm/mach-msm/Kconfig"
 776
 777 source "arch/arm/mach-mv78xx0/Kconfig"
 778
 779 source "arch/arm/plat-mxc/Kconfig"
 780
 781 source "arch/arm/mach-netx/Kconfig"
 782
 783 source "arch/arm/mach-nomadik/Kconfig"
 784 source "arch/arm/plat-nomadik/Kconfig"
 785
 786 source "arch/arm/mach-ns9xxx/Kconfig"
 787
 788 source "arch/arm/plat-omap/Kconfig"
 789
 790 source "arch/arm/mach-omap1/Kconfig"
 791
 792 source "arch/arm/mach-omap2/Kconfig"
 793
 794 source "arch/arm/mach-orion5x/Kconfig"
 795
 796 source "arch/arm/mach-pxa/Kconfig"
 797 source "arch/arm/plat-pxa/Kconfig"
 798
 799 source "arch/arm/mach-mmp/Kconfig"
 800
 801 source "arch/arm/mach-realview/Kconfig"
 802
 803 source "arch/arm/mach-sa1100/Kconfig"
 804
 805 source "arch/arm/plat-samsung/Kconfig"
 806 source "arch/arm/plat-s3c24xx/Kconfig"
 807 source "arch/arm/plat-s3c64xx/Kconfig"
 808 source "arch/arm/plat-s3c/Kconfig"
 809 source "arch/arm/plat-s5pc1xx/Kconfig"
 810
 811 if ARCH_S3C2410
 812 source "arch/arm/mach-s3c2400/Kconfig"
 813 source "arch/arm/mach-s3c2410/Kconfig"
 814 source "arch/arm/mach-s3c2412/Kconfig"
 815 source "arch/arm/mach-s3c2440/Kconfig"
 816 source "arch/arm/mach-s3c2442/Kconfig"
 817 source "arch/arm/mach-s3c2443/Kconfig"
 818 endif
 819
 820 if ARCH_S3C64XX
 821 source "arch/arm/mach-s3c6400/Kconfig"
 822 source "arch/arm/mach-s3c6410/Kconfig"
 823 endif
 824
 825 source "arch/arm/plat-stmp3xxx/Kconfig"
 826
 827 if ARCH_S5PC1XX
 828 source "arch/arm/mach-s5pc100/Kconfig"
 829 endif
 830
 831 source "arch/arm/mach-u300/Kconfig"
 832
 833 source "arch/arm/mach-ux500/Kconfig"
 834
 835 source "arch/arm/mach-versatile/Kconfig"
 836
 837 source "arch/arm/mach-w90x900/Kconfig"
 838
 839 # Definitions to make life easier
 840 config ARCH_ACORN
 841         bool
 842
 843 config PLAT_IOP
 844         bool
 845         select GENERIC_CLOCKEVENTS
 846         select GENERIC_TIME
 847
 848 config PLAT_ORION
 849         bool
 850
 851 config PLAT_PXA
 852         bool
 853
 854 source arch/arm/mm/Kconfig
 855
 856 config IWMMXT
 857         bool "Enable iWMMXt support"
 858         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 859         default y if PXA27x || PXA3xx || ARCH_MMP
 860         help
 861           Enable support for iWMMXt context switching at run time if
 862           running on a CPU that supports it.
 863
 864 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 865 config XSCALE_PMU
 866         bool
 867         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 868         default y
 869
 870 if !MMU
 871 source "arch/arm/Kconfig-nommu"
 872 endif
 873
 874 config ARM_ERRATA_411920
 875         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 876         depends on CPU_V6 && !SMP
 877         help
 878           Invalidation of the Instruction Cache operation can
 879           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 880           It does not affect the MPCore. This option enables the ARM Ltd.
 881           recommended workaround.
 882
 883 config ARM_ERRATA_430973
 884         bool "ARM errata: Stale prediction on replaced interworking branch"
 885         depends on CPU_V7
 886         help
 887           This option enables the workaround for the 430973 Cortex-A8
 888           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 889           interworking branch is replaced with another code sequence at the
 890           same virtual address, whether due to self-modifying code or virtual
 891           to physical address re-mapping, Cortex-A8 does not recover from the
 892           stale interworking branch prediction. This results in Cortex-A8
 893           executing the new code sequence in the incorrect ARM or Thumb state.
 894           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 895           and also flushes the branch target cache at every context switch.
 896           Note that setting specific bits in the ACTLR register may not be
 897           available in non-secure mode.
 898
 899 config ARM_ERRATA_458693
 900         bool "ARM errata: Processor deadlock when a false hazard is created"
 901         depends on CPU_V7
 902         help
 903           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
 904           erratum. For very specific sequences of memory operations, it is
 905           possible for a hazard condition intended for a cache line to instead
 906           be incorrectly associated with a different cache line. This false
 907           hazard might then cause a processor deadlock. The workaround enables
 908           the L1 caching of the NEON accesses and disables the PLD instruction
 909           in the ACTLR register. Note that setting specific bits in the ACTLR
 910           register may not be available in non-secure mode.
 911
 912 config ARM_ERRATA_460075
 913         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
 914         depends on CPU_V7
 915         help
 916           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
 917           erratum. Any asynchronous access to the L2 cache may encounter a
 918           situation in which recent store transactions to the L2 cache are lost
 919           and overwritten with stale memory contents from external memory. The
 920           workaround disables the write-allocate mode for the L2 cache via the
 921           ACTLR register. Note that setting specific bits in the ACTLR register
 922           may not be available in non-secure mode.
 923
 924 endmenu
 925
 926 source "arch/arm/common/Kconfig"
 927
 928 config FORCE_MAX_ZONEORDER
 929         int
 930         depends on SA1111
 931         default "9"
 932
 933 menu "Bus support"
 934
 935 config ARM_AMBA
 936         bool
 937
 938 config ISA
 939         bool
 940         help
 941           Find out whether you have ISA slots on your motherboard.  ISA is the
 942           name of a bus system, i.e. the way the CPU talks to the other stuff
 943           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 944           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 945           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 946
 947 # Select ISA DMA controller support
 948 config ISA_DMA
 949         bool
 950         select ISA_DMA_API
 951
 952 # Select ISA DMA interface
 953 config ISA_DMA_API
 954         bool
 955
 956 config PCI
 957         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 958         help
 959           Find out whether you have a PCI motherboard. PCI is the name of a
 960           bus system, i.e. the way the CPU talks to the other stuff inside
 961           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 962           VESA. If you have PCI, say Y, otherwise N.
 963
 964 config PCI_SYSCALL
 965         def_bool PCI
 966
 967 # Select the host bridge type
 968 config PCI_HOST_VIA82C505
 969         bool
 970         depends on PCI && ARCH_SHARK
 971         default y
 972
 973 config PCI_HOST_ITE8152
 974         bool
 975         depends on PCI && MACH_ARMCORE
 976         default y
 977         select DMABOUNCE
 978
 979 source "drivers/pci/Kconfig"
 980
 981 source "drivers/pcmcia/Kconfig"
 982
 983 endmenu
 984
 985 menu "Kernel Features"
 986
 987 source "kernel/time/Kconfig"
 988
 989 config SMP
 990         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 991         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
 992                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
 993         depends on GENERIC_CLOCKEVENTS
 994         select USE_GENERIC_SMP_HELPERS
 995         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
 996         help
 997           This enables support for systems with more than one CPU. If you have
 998           a system with only one CPU, like most personal computers, say N. If
 999           you have a system with more than one CPU, say Y.
1000
1001           If you say N here, the kernel will run on single and multiprocessor
1002           machines, but will use only one CPU of a multiprocessor machine. If
1003           you say Y here, the kernel will run on many, but not all, single
1004           processor machines. On a single processor machine, the kernel will
1005           run faster if you say N here.
1006
1007           See also <file:Documentation/i386/IO-APIC.txt>,
1008           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1009           <http://www.linuxdoc.org/docs.html#howto>.
1010
1011           If you don't know what to do here, say N.
1012
1013 config HAVE_ARM_SCU
1014         bool
1015         depends on SMP
1016         help
1017           This option enables support for the ARM system coherency unit
1018
1019 config HAVE_ARM_TWD
1020         bool
1021         depends on SMP
1022         help
1023           This options enables support for the ARM timer and watchdog unit
1024
1025 choice
1026         prompt "Memory split"
1027         default VMSPLIT_3G
1028         help
1029           Select the desired split between kernel and user memory.
1030
1031           If you are not absolutely sure what you are doing, leave this
1032           option alone!
1033
1034         config VMSPLIT_3G
1035                 bool "3G/1G user/kernel split"
1036         config VMSPLIT_2G
1037                 bool "2G/2G user/kernel split"
1038         config VMSPLIT_1G
1039                 bool "1G/3G user/kernel split"
1040 endchoice
1041
1042 config PAGE_OFFSET
1043         hex
1044         default 0x40000000 if VMSPLIT_1G
1045         default 0x80000000 if VMSPLIT_2G
1046         default 0xC0000000
1047
1048 config NR_CPUS
1049         int "Maximum number of CPUs (2-32)"
1050         range 2 32
1051         depends on SMP
1052         default "4"
1053
1054 config HOTPLUG_CPU
1055         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1056         depends on SMP && HOTPLUG && EXPERIMENTAL
1057         help
1058           Say Y here to experiment with turning CPUs off and on.  CPUs
1059           can be controlled through /sys/devices/system/cpu.
1060
1061 config LOCAL_TIMERS
1062         bool "Use local timer interrupts"
1063         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1064                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1065         default y
1066         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1067         help
1068           Enable support for local timers on SMP platforms, rather then the
1069           legacy IPI broadcast method.  Local timers allows the system
1070           accounting to be spread across the timer interval, preventing a
1071           "thundering herd" at every timer tick.
1072
1073 source kernel/Kconfig.preempt
1074
1075 config HZ
1076         int
1077         default 128 if ARCH_L7200
1078         default 200 if ARCH_EBSA110 || ARCH_S3C2410
1079         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1080         default AT91_TIMER_HZ if ARCH_AT91
1081         default 100
1082
1083 config THUMB2_KERNEL
1084         bool "Compile the kernel in Thumb-2 mode"
1085         depends on CPU_V7 && EXPERIMENTAL
1086         select AEABI
1087         select ARM_ASM_UNIFIED
1088         help
1089           By enabling this option, the kernel will be compiled in
1090           Thumb-2 mode. A compiler/assembler that understand the unified
1091           ARM-Thumb syntax is needed.
1092
1093           If unsure, say N.
1094
1095 config ARM_ASM_UNIFIED
1096         bool
1097
1098 config AEABI
1099         bool "Use the ARM EABI to compile the kernel"
1100         help
1101           This option allows for the kernel to be compiled using the latest
1102           ARM ABI (aka EABI).  This is only useful if you are using a user
1103           space environment that is also compiled with EABI.
1104
1105           Since there are major incompatibilities between the legacy ABI and
1106           EABI, especially with regard to structure member alignment, this
1107           option also changes the kernel syscall calling convention to
1108           disambiguate both ABIs and allow for backward compatibility support
1109           (selected with CONFIG_OABI_COMPAT).
1110
1111           To use this you need GCC version 4.0.0 or later.
1112
1113 config OABI_COMPAT
1114         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1115         depends on AEABI && EXPERIMENTAL
1116         default y
1117         help
1118           This option preserves the old syscall interface along with the
1119           new (ARM EABI) one. It also provides a compatibility layer to
1120           intercept syscalls that have structure arguments which layout
1121           in memory differs between the legacy ABI and the new ARM EABI
1122           (only for non "thumb" binaries). This option adds a tiny
1123           overhead to all syscalls and produces a slightly larger kernel.
1124           If you know you'll be using only pure EABI user space then you
1125           can say N here. If this option is not selected and you attempt
1126           to execute a legacy ABI binary then the result will be
1127           UNPREDICTABLE (in fact it can be predicted that it won't work
1128           at all). If in doubt say Y.
1129
1130 config ARCH_HAS_HOLES_MEMORYMODEL
1131         bool
1132
1133 # Discontigmem is deprecated
1134 config ARCH_DISCONTIGMEM_ENABLE
1135         bool
1136
1137 config ARCH_SPARSEMEM_ENABLE
1138         bool
1139
1140 config ARCH_SPARSEMEM_DEFAULT
1141         def_bool ARCH_SPARSEMEM_ENABLE
1142
1143 config ARCH_SELECT_MEMORY_MODEL
1144         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1145
1146 config NODES_SHIFT
1147         int
1148         default "4" if ARCH_LH7A40X
1149         default "2"
1150         depends on NEED_MULTIPLE_NODES
1151
1152 config HIGHMEM
1153         bool "High Memory Support (EXPERIMENTAL)"
1154         depends on MMU && EXPERIMENTAL
1155         help
1156           The address space of ARM processors is only 4 Gigabytes large
1157           and it has to accommodate user address space, kernel address
1158           space as well as some memory mapped IO. That means that, if you
1159           have a large amount of physical memory and/or IO, not all of the
1160           memory can be "permanently mapped" by the kernel. The physical
1161           memory that is not permanently mapped is called "high memory".
1162
1163           Depending on the selected kernel/user memory split, minimum
1164           vmalloc space and actual amount of RAM, you may not need this
1165           option which should result in a slightly faster kernel.
1166
1167           If unsure, say n.
1168
1169 config HIGHPTE
1170         bool "Allocate 2nd-level pagetables from highmem"
1171         depends on HIGHMEM
1172         depends on !OUTER_CACHE
1173
1174 source "mm/Kconfig"
1175
1176 config LEDS
1177         bool "Timer and CPU usage LEDs"
1178         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1179                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1180                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1181                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1182                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1183                    ARCH_AT91 || ARCH_DAVINCI || \
1184                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1185         help
1186           If you say Y here, the LEDs on your machine will be used
1187           to provide useful information about your current system status.
1188
1189           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1190           be able to select which LEDs are active using the options below. If
1191           you are compiling a kernel for the EBSA-110 or the LART however, the
1192           red LED will simply flash regularly to indicate that the system is
1193           still functional. It is safe to say Y here if you have a CATS
1194           system, but the driver will do nothing.
1195
1196 config LEDS_TIMER
1197         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1198                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1199                             || MACH_OMAP_PERSEUS2
1200         depends on LEDS
1201         depends on !GENERIC_CLOCKEVENTS
1202         default y if ARCH_EBSA110
1203         help
1204           If you say Y here, one of the system LEDs (the green one on the
1205           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1206           will flash regularly to indicate that the system is still
1207           operational. This is mainly useful to kernel hackers who are
1208           debugging unstable kernels.
1209
1210           The LART uses the same LED for both Timer LED and CPU usage LED
1211           functions. You may choose to use both, but the Timer LED function
1212           will overrule the CPU usage LED.
1213
1214 config LEDS_CPU
1215         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1216                         !ARCH_OMAP) \
1217                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1218                         || MACH_OMAP_PERSEUS2
1219         depends on LEDS
1220         help
1221           If you say Y here, the red LED will be used to give a good real
1222           time indication of CPU usage, by lighting whenever the idle task
1223           is not currently executing.
1224
1225           The LART uses the same LED for both Timer LED and CPU usage LED
1226           functions. You may choose to use both, but the Timer LED function
1227           will overrule the CPU usage LED.
1228
1229 config ALIGNMENT_TRAP
1230         bool
1231         depends on CPU_CP15_MMU
1232         default y if !ARCH_EBSA110
1233         help
1234           ARM processors cannot fetch/store information which is not
1235           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1236           address divisible by 4. On 32-bit ARM processors, these non-aligned
1237           fetch/store instructions will be emulated in software if you say
1238           here, which has a severe performance impact. This is necessary for
1239           correct operation of some network protocols. With an IP-only
1240           configuration it is safe to say N, otherwise say Y.
1241
1242 config UACCESS_WITH_MEMCPY
1243         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1244         depends on MMU && EXPERIMENTAL
1245         default y if CPU_FEROCEON
1246         help
1247           Implement faster copy_to_user and clear_user methods for CPU
1248           cores where a 8-word STM instruction give significantly higher
1249           memory write throughput than a sequence of individual 32bit stores.
1250
1251           A possible side effect is a slight increase in scheduling latency
1252           between threads sharing the same address space if they invoke
1253           such copy operations with large buffers.
1254
1255           However, if the CPU data cache is using a write-allocate mode,
1256           this option is unlikely to provide any performance gain.
1257
1258 endmenu
1259
1260 menu "Boot options"
1261
1262 # Compressed boot loader in ROM.  Yes, we really want to ask about
1263 # TEXT and BSS so we preserve their values in the config files.
1264 config ZBOOT_ROM_TEXT
1265         hex "Compressed ROM boot loader base address"
1266         default "0"
1267         help
1268           The physical address at which the ROM-able zImage is to be
1269           placed in the target.  Platforms which normally make use of
1270           ROM-able zImage formats normally set this to a suitable
1271           value in their defconfig file.
1272
1273           If ZBOOT_ROM is not enabled, this has no effect.
1274
1275 config ZBOOT_ROM_BSS
1276         hex "Compressed ROM boot loader BSS address"
1277         default "0"
1278         help
1279           The base address of an area of read/write memory in the target
1280           for the ROM-able zImage which must be available while the
1281           decompressor is running. It must be large enough to hold the
1282           entire decompressed kernel plus an additional 128 KiB.
1283           Platforms which normally make use of ROM-able zImage formats
1284           normally set this to a suitable value in their defconfig file.
1285
1286           If ZBOOT_ROM is not enabled, this has no effect.
1287
1288 config ZBOOT_ROM
1289         bool "Compressed boot loader in ROM/flash"
1290         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1291         help
1292           Say Y here if you intend to execute your compressed kernel image
1293           (zImage) directly from ROM or flash.  If unsure, say N.
1294
1295 config CMDLINE
1296         string "Default kernel command string"
1297         default ""
1298         help
1299           On some architectures (EBSA110 and CATS), there is currently no way
1300           for the boot loader to pass arguments to the kernel. For these
1301           architectures, you should supply some command-line options at build
1302           time by entering them here. As a minimum, you should specify the
1303           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1304
1305 config XIP_KERNEL
1306         bool "Kernel Execute-In-Place from ROM"
1307         depends on !ZBOOT_ROM
1308         help
1309           Execute-In-Place allows the kernel to run from non-volatile storage
1310           directly addressable by the CPU, such as NOR flash. This saves RAM
1311           space since the text section of the kernel is not loaded from flash
1312           to RAM.  Read-write sections, such as the data section and stack,
1313           are still copied to RAM.  The XIP kernel is not compressed since
1314           it has to run directly from flash, so it will take more space to
1315           store it.  The flash address used to link the kernel object files,
1316           and for storing it, is configuration dependent. Therefore, if you
1317           say Y here, you must know the proper physical address where to
1318           store the kernel image depending on your own flash memory usage.
1319
1320           Also note that the make target becomes "make xipImage" rather than
1321           "make zImage" or "make Image".  The final kernel binary to put in
1322           ROM memory will be arch/arm/boot/xipImage.
1323
1324           If unsure, say N.
1325
1326 config XIP_PHYS_ADDR
1327         hex "XIP Kernel Physical Location"
1328         depends on XIP_KERNEL
1329         default "0x00080000"
1330         help
1331           This is the physical address in your flash memory the kernel will
1332           be linked for and stored to.  This address is dependent on your
1333           own flash usage.
1334
1335 config KEXEC
1336         bool "Kexec system call (EXPERIMENTAL)"
1337         depends on EXPERIMENTAL
1338         help
1339           kexec is a system call that implements the ability to shutdown your
1340           current kernel, and to start another kernel.  It is like a reboot
1341           but it is independent of the system firmware.   And like a reboot
1342           you can start any kernel with it, not just Linux.
1343
1344           It is an ongoing process to be certain the hardware in a machine
1345           is properly shutdown, so do not be surprised if this code does not
1346           initially work for you.  It may help to enable device hotplugging
1347           support.
1348
1349 config ATAGS_PROC
1350         bool "Export atags in procfs"
1351         depends on KEXEC
1352         default y
1353         help
1354           Should the atags used to boot the kernel be exported in an "atags"
1355           file in procfs. Useful with kexec.
1356
1357 endmenu
1358
1359 menu "CPU Power Management"
1360
1361 if ARCH_HAS_CPUFREQ
1362
1363 source "drivers/cpufreq/Kconfig"
1364
1365 config CPU_FREQ_SA1100
1366         bool
1367
1368 config CPU_FREQ_SA1110
1369         bool
1370
1371 config CPU_FREQ_INTEGRATOR
1372         tristate "CPUfreq driver for ARM Integrator CPUs"
1373         depends on ARCH_INTEGRATOR && CPU_FREQ
1374         default y
1375         help
1376           This enables the CPUfreq driver for ARM Integrator CPUs.
1377
1378           For details, take a look at <file:Documentation/cpu-freq>.
1379
1380           If in doubt, say Y.
1381
1382 config CPU_FREQ_PXA
1383         bool
1384         depends on CPU_FREQ && ARCH_PXA && PXA25x
1385         default y
1386         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1387
1388 config CPU_FREQ_S3C64XX
1389         bool "CPUfreq support for Samsung S3C64XX CPUs"
1390         depends on CPU_FREQ && CPU_S3C6410
1391
1392 config CPU_FREQ_S3C
1393         bool
1394         help
1395           Internal configuration node for common cpufreq on Samsung SoC
1396
1397 config CPU_FREQ_S3C24XX
1398         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1399         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1400         select CPU_FREQ_S3C
1401         help
1402           This enables the CPUfreq driver for the Samsung S3C24XX family
1403           of CPUs.
1404
1405           For details, take a look at <file:Documentation/cpu-freq>.
1406
1407           If in doubt, say N.
1408
1409 config CPU_FREQ_S3C24XX_PLL
1410         bool "Support CPUfreq changing of PLL frequency"
1411         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1412         help
1413           Compile in support for changing the PLL frequency from the
1414           S3C24XX series CPUfreq driver. The PLL takes time to settle
1415           after a frequency change, so by default it is not enabled.
1416
1417           This also means that the PLL tables for the selected CPU(s) will
1418           be built which may increase the size of the kernel image.
1419
1420 config CPU_FREQ_S3C24XX_DEBUG
1421         bool "Debug CPUfreq Samsung driver core"
1422         depends on CPU_FREQ_S3C24XX
1423         help
1424           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1425
1426 config CPU_FREQ_S3C24XX_IODEBUG
1427         bool "Debug CPUfreq Samsung driver IO timing"
1428         depends on CPU_FREQ_S3C24XX
1429         help
1430           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1431
1432 config CPU_FREQ_S3C24XX_DEBUGFS
1433         bool "Export debugfs for CPUFreq"
1434         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1435         help
1436           Export status information via debugfs.
1437
1438 endif
1439
1440 source "drivers/cpuidle/Kconfig"
1441
1442 endmenu
1443
1444 menu "Floating point emulation"
1445
1446 comment "At least one emulation must be selected"
1447
1448 config FPE_NWFPE
1449         bool "NWFPE math emulation"
1450         depends on !AEABI || OABI_COMPAT
1451         ---help---
1452           Say Y to include the NWFPE floating point emulator in the kernel.
1453           This is necessary to run most binaries. Linux does not currently
1454           support floating point hardware so you need to say Y here even if
1455           your machine has an FPA or floating point co-processor podule.
1456
1457           You may say N here if you are going to load the Acorn FPEmulator
1458           early in the bootup.
1459
1460 config FPE_NWFPE_XP
1461         bool "Support extended precision"
1462         depends on FPE_NWFPE
1463         help
1464           Say Y to include 80-bit support in the kernel floating-point
1465           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1466           Note that gcc does not generate 80-bit operations by default,
1467           so in most cases this option only enlarges the size of the
1468           floating point emulator without any good reason.
1469
1470           You almost surely want to say N here.
1471
1472 config FPE_FASTFPE
1473         bool "FastFPE math emulation (EXPERIMENTAL)"
1474         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1475         ---help---
1476           Say Y here to include the FAST floating point emulator in the kernel.
1477           This is an experimental much faster emulator which now also has full
1478           precision for the mantissa.  It does not support any exceptions.
1479           It is very simple, and approximately 3-6 times faster than NWFPE.
1480
1481           It should be sufficient for most programs.  It may be not suitable
1482           for scientific calculations, but you have to check this for yourself.
1483           If you do not feel you need a faster FP emulation you should better
1484           choose NWFPE.
1485
1486 config VFP
1487         bool "VFP-format floating point maths"
1488         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1489         help
1490           Say Y to include VFP support code in the kernel. This is needed
1491           if your hardware includes a VFP unit.
1492
1493           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1494           release notes and additional status information.
1495
1496           Say N if your target does not have VFP hardware.
1497
1498 config VFPv3
1499         bool
1500         depends on VFP
1501         default y if CPU_V7
1502
1503 config NEON
1504         bool "Advanced SIMD (NEON) Extension support"
1505         depends on VFPv3 && CPU_V7
1506         help
1507           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1508           Extension.
1509
1510 endmenu
1511
1512 menu "Userspace binary formats"
1513
1514 source "fs/Kconfig.binfmt"
1515
1516 config ARTHUR
1517         tristate "RISC OS personality"
1518         depends on !AEABI
1519         help
1520           Say Y here to include the kernel code necessary if you want to run
1521           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1522           experimental; if this sounds frightening, say N and sleep in peace.
1523           You can also say M here to compile this support as a module (which
1524           will be called arthur).
1525
1526 endmenu
1527
1528 menu "Power management options"
1529
1530 source "kernel/power/Kconfig"
1531
1532 config ARCH_SUSPEND_POSSIBLE
1533         def_bool y
1534
1535 endmenu
1536
1537 source "net/Kconfig"
1538
1539 source "drivers/Kconfig"
1540
1541 source "fs/Kconfig"
1542
1543 source "arch/arm/Kconfig.debug"
1544
1545 source "security/Kconfig"
1546
1547 source "crypto/Kconfig"
1548
1549 source "lib/Kconfig"