arch/arm/Kconfig

   1 #
   2 # For a description of the syntax of this configuration file,
   3 # see Documentation/kbuild/kconfig-language.txt.
   4 #
   5
   6 mainmenu "Linux Kernel Configuration"
   7
   8 config ARM
   9         bool
  10         default y
  11         select HAVE_AOUT
  12         select HAVE_IDE
  13         select RTC_LIB
  14         select SYS_SUPPORTS_APM_EMULATION
  15         select HAVE_OPROFILE
  16         select HAVE_ARCH_KGDB
  17         select HAVE_KPROBES if (!XIP_KERNEL)
  18         select HAVE_KRETPROBES if (HAVE_KPROBES)
  19         select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  20         select HAVE_GENERIC_DMA_COHERENT
  21         help
  22           The ARM series is a line of low-power-consumption RISC chip designs
  23           licensed by ARM Ltd and targeted at embedded applications and
  24           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  25           manufactured, but legacy ARM-based PC hardware remains popular in
  26           Europe.  There is an ARM Linux project with a web page at
  27           <http://www.arm.linux.org.uk/>.
  28
  29 config HAVE_PWM
  30         bool
  31
  32 config SYS_SUPPORTS_APM_EMULATION
  33         bool
  34
  35 config GENERIC_GPIO
  36         bool
  37
  38 config GENERIC_TIME
  39         bool
  40
  41 config GENERIC_CLOCKEVENTS
  42         bool
  43
  44 config GENERIC_CLOCKEVENTS_BROADCAST
  45         bool
  46         depends on GENERIC_CLOCKEVENTS
  47         default y if SMP && !LOCAL_TIMERS
  48
  49 config HAVE_TCM
  50         bool
  51         select GENERIC_ALLOCATOR
  52
  53 config NO_IOPORT
  54         bool
  55
  56 config EISA
  57         bool
  58         ---help---
  59           The Extended Industry Standard Architecture (EISA) bus was
  60           developed as an open alternative to the IBM MicroChannel bus.
  61
  62           The EISA bus provided some of the features of the IBM MicroChannel
  63           bus while maintaining backward compatibility with cards made for
  64           the older ISA bus.  The EISA bus saw limited use between 1988 and
  65           1995 when it was made obsolete by the PCI bus.
  66
  67           Say Y here if you are building a kernel for an EISA-based machine.
  68
  69           Otherwise, say N.
  70
  71 config SBUS
  72         bool
  73
  74 config MCA
  75         bool
  76         help
  77           MicroChannel Architecture is found in some IBM PS/2 machines and
  78           laptops.  It is a bus system similar to PCI or ISA. See
  79           <file:Documentation/mca.txt> (and especially the web page given
  80           there) before attempting to build an MCA bus kernel.
  81
  82 config GENERIC_HARDIRQS
  83         bool
  84         default y
  85
  86 config STACKTRACE_SUPPORT
  87         bool
  88         default y
  89
  90 config HAVE_LATENCYTOP_SUPPORT
  91         bool
  92         depends on !SMP
  93         default y
  94
  95 config LOCKDEP_SUPPORT
  96         bool
  97         default y
  98
  99 config TRACE_IRQFLAGS_SUPPORT
 100         bool
 101         default y
 102
 103 config HARDIRQS_SW_RESEND
 104         bool
 105         default y
 106
 107 config GENERIC_IRQ_PROBE
 108         bool
 109         default y
 110
 111 config GENERIC_LOCKBREAK
 112         bool
 113         default y
 114         depends on SMP && PREEMPT
 115
 116 config RWSEM_GENERIC_SPINLOCK
 117         bool
 118         default y
 119
 120 config RWSEM_XCHGADD_ALGORITHM
 121         bool
 122
 123 config ARCH_HAS_ILOG2_U32
 124         bool
 125
 126 config ARCH_HAS_ILOG2_U64
 127         bool
 128
 129 config ARCH_HAS_CPUFREQ
 130         bool
 131         help
 132           Internal node to signify that the ARCH has CPUFREQ support
 133           and that the relevant menu configurations are displayed for
 134           it.
 135
 136 config GENERIC_HWEIGHT
 137         bool
 138         default y
 139
 140 config GENERIC_CALIBRATE_DELAY
 141         bool
 142         default y
 143
 144 config ARCH_MAY_HAVE_PC_FDC
 145         bool
 146
 147 config ZONE_DMA
 148         bool
 149
 150 config GENERIC_ISA_DMA
 151         bool
 152
 153 config FIQ
 154         bool
 155
 156 config ARCH_MTD_XIP
 157         bool
 158
 159 config GENERIC_HARDIRQS_NO__DO_IRQ
 160         def_bool y
 161
 162 if OPROFILE
 163
 164 config OPROFILE_ARMV6
 165         def_bool y
 166         depends on CPU_V6 && !SMP
 167         select OPROFILE_ARM11_CORE
 168
 169 config OPROFILE_MPCORE
 170         def_bool y
 171         depends on CPU_V6 && SMP
 172         select OPROFILE_ARM11_CORE
 173
 174 config OPROFILE_ARM11_CORE
 175         bool
 176
 177 config OPROFILE_ARMV7
 178         def_bool y
 179         depends on CPU_V7 && !SMP
 180         bool
 181
 182 endif
 183
 184 config VECTORS_BASE
 185         hex
 186         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 187         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 188         default 0x00000000
 189         help
 190           The base address of exception vectors.
 191
 192 source "init/Kconfig"
 193
 194 source "kernel/Kconfig.freezer"
 195
 196 menu "System Type"
 197
 198 config MMU
 199         bool "MMU-based Paged Memory Management Support"
 200         default y
 201         help
 202           Select if you want MMU-based virtualised addressing space
 203           support by paged memory management. If unsure, say 'Y'.
 204
 205 choice
 206         prompt "ARM system type"
 207         default ARCH_VERSATILE
 208
 209 config ARCH_AAEC2000
 210         bool "Agilent AAEC-2000 based"
 211         select CPU_ARM920T
 212         select ARM_AMBA
 213         select HAVE_CLK
 214         help
 215           This enables support for systems based on the Agilent AAEC-2000
 216
 217 config ARCH_INTEGRATOR
 218         bool "ARM Ltd. Integrator family"
 219         select ARM_AMBA
 220         select ARCH_HAS_CPUFREQ
 221         select HAVE_CLK
 222         select COMMON_CLKDEV
 223         select ICST525
 224         help
 225           Support for ARM's Integrator platform.
 226
 227 config ARCH_REALVIEW
 228         bool "ARM Ltd. RealView family"
 229         select ARM_AMBA
 230         select HAVE_CLK
 231         select COMMON_CLKDEV
 232         select ICST307
 233         select GENERIC_TIME
 234         select GENERIC_CLOCKEVENTS
 235         select ARCH_WANT_OPTIONAL_GPIOLIB
 236         help
 237           This enables support for ARM Ltd RealView boards.
 238
 239 config ARCH_VERSATILE
 240         bool "ARM Ltd. Versatile family"
 241         select ARM_AMBA
 242         select ARM_VIC
 243         select HAVE_CLK
 244         select COMMON_CLKDEV
 245         select ICST307
 246         select GENERIC_TIME
 247         select GENERIC_CLOCKEVENTS
 248         select ARCH_WANT_OPTIONAL_GPIOLIB
 249         help
 250           This enables support for ARM Ltd Versatile board.
 251
 252 config ARCH_AT91
 253         bool "Atmel AT91"
 254         select GENERIC_GPIO
 255         select ARCH_REQUIRE_GPIOLIB
 256         select HAVE_CLK
 257         help
 258           This enables support for systems based on the Atmel AT91RM9200,
 259           AT91SAM9 and AT91CAP9 processors.
 260
 261 config ARCH_CLPS711X
 262         bool "Cirrus Logic CLPS711x/EP721x-based"
 263         select CPU_ARM720T
 264         help
 265           Support for Cirrus Logic 711x/721x based boards.
 266
 267 config ARCH_GEMINI
 268         bool "Cortina Systems Gemini"
 269         select CPU_FA526
 270         select GENERIC_GPIO
 271         select ARCH_REQUIRE_GPIOLIB
 272         help
 273           Support for the Cortina Systems Gemini family SoCs
 274
 275 config ARCH_EBSA110
 276         bool "EBSA-110"
 277         select CPU_SA110
 278         select ISA
 279         select NO_IOPORT
 280         help
 281           This is an evaluation board for the StrongARM processor available
 282           from Digital. It has limited hardware on-board, including an
 283           Ethernet interface, two PCMCIA sockets, two serial ports and a
 284           parallel port.
 285
 286 config ARCH_EP93XX
 287         bool "EP93xx-based"
 288         select CPU_ARM920T
 289         select ARM_AMBA
 290         select ARM_VIC
 291         select GENERIC_GPIO
 292         select HAVE_CLK
 293         select COMMON_CLKDEV
 294         select ARCH_REQUIRE_GPIOLIB
 295         select ARCH_HAS_HOLES_MEMORYMODEL
 296         help
 297           This enables support for the Cirrus EP93xx series of CPUs.
 298
 299 config ARCH_FOOTBRIDGE
 300         bool "FootBridge"
 301         select CPU_SA110
 302         select FOOTBRIDGE
 303         help
 304           Support for systems based on the DC21285 companion chip
 305           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 306
 307 config ARCH_MXC
 308         bool "Freescale MXC/iMX-based"
 309         select GENERIC_TIME
 310         select GENERIC_CLOCKEVENTS
 311         select ARCH_MTD_XIP
 312         select GENERIC_GPIO
 313         select ARCH_REQUIRE_GPIOLIB
 314         select HAVE_CLK
 315         help
 316           Support for Freescale MXC/iMX-based family of processors
 317
 318 config ARCH_STMP3XXX
 319         bool "Freescale STMP3xxx"
 320         select CPU_ARM926T
 321         select HAVE_CLK
 322         select COMMON_CLKDEV
 323         select ARCH_REQUIRE_GPIOLIB
 324         select GENERIC_TIME
 325         select GENERIC_CLOCKEVENTS
 326         select GENERIC_GPIO
 327         select USB_ARCH_HAS_EHCI
 328         help
 329           Support for systems based on the Freescale 3xxx CPUs.
 330
 331 config ARCH_NETX
 332         bool "Hilscher NetX based"
 333         select CPU_ARM926T
 334         select ARM_VIC
 335         select GENERIC_CLOCKEVENTS
 336         select GENERIC_TIME
 337         help
 338           This enables support for systems based on the Hilscher NetX Soc
 339
 340 config ARCH_H720X
 341         bool "Hynix HMS720x-based"
 342         select CPU_ARM720T
 343         select ISA_DMA_API
 344         help
 345           This enables support for systems based on the Hynix HMS720x
 346
 347 config ARCH_NOMADIK
 348         bool "STMicroelectronics Nomadik"
 349         select ARM_AMBA
 350         select ARM_VIC
 351         select CPU_ARM926T
 352         select HAVE_CLK
 353         select COMMON_CLKDEV
 354         select GENERIC_TIME
 355         select GENERIC_CLOCKEVENTS
 356         select GENERIC_GPIO
 357         select ARCH_REQUIRE_GPIOLIB
 358         help
 359           Support for the Nomadik platform by ST-Ericsson
 360
 361 config ARCH_IOP13XX
 362         bool "IOP13xx-based"
 363         depends on MMU
 364         select CPU_XSC3
 365         select PLAT_IOP
 366         select PCI
 367         select ARCH_SUPPORTS_MSI
 368         select VMSPLIT_1G
 369         help
 370           Support for Intel's IOP13XX (XScale) family of processors.
 371
 372 config ARCH_IOP32X
 373         bool "IOP32x-based"
 374         depends on MMU
 375         select CPU_XSCALE
 376         select PLAT_IOP
 377         select PCI
 378         select GENERIC_GPIO
 379         select ARCH_REQUIRE_GPIOLIB
 380         help
 381           Support for Intel's 80219 and IOP32X (XScale) family of
 382           processors.
 383
 384 config ARCH_IOP33X
 385         bool "IOP33x-based"
 386         depends on MMU
 387         select CPU_XSCALE
 388         select PLAT_IOP
 389         select PCI
 390         select GENERIC_GPIO
 391         select ARCH_REQUIRE_GPIOLIB
 392         help
 393           Support for Intel's IOP33X (XScale) family of processors.
 394
 395 config ARCH_IXP23XX
 396         bool "IXP23XX-based"
 397         depends on MMU
 398         select CPU_XSC3
 399         select PCI
 400         help
 401           Support for Intel's IXP23xx (XScale) family of processors.
 402
 403 config ARCH_IXP2000
 404         bool "IXP2400/2800-based"
 405         depends on MMU
 406         select CPU_XSCALE
 407         select PCI
 408         help
 409           Support for Intel's IXP2400/2800 (XScale) family of processors.
 410
 411 config ARCH_IXP4XX
 412         bool "IXP4xx-based"
 413         depends on MMU
 414         select CPU_XSCALE
 415         select GENERIC_GPIO
 416         select GENERIC_TIME
 417         select GENERIC_CLOCKEVENTS
 418         select DMABOUNCE if PCI
 419         help
 420           Support for Intel's IXP4XX (XScale) family of processors.
 421
 422 config ARCH_L7200
 423         bool "LinkUp-L7200"
 424         select CPU_ARM720T
 425         select FIQ
 426         help
 427           Say Y here if you intend to run this kernel on a LinkUp Systems
 428           L7200 Software Development Board which uses an ARM720T processor.
 429           Information on this board can be obtained at:
 430
 431           <http://www.linkupsys.com/>
 432
 433           If you have any questions or comments about the Linux kernel port
 434           to this board, send e-mail to <sjhill@cotw.com>.
 435
 436 config ARCH_DOVE
 437         bool "Marvell Dove"
 438         select PCI
 439         select GENERIC_GPIO
 440         select ARCH_REQUIRE_GPIOLIB
 441         select GENERIC_TIME
 442         select GENERIC_CLOCKEVENTS
 443         select PLAT_ORION
 444         help
 445           Support for the Marvell Dove SoC 88AP510
 446
 447 config ARCH_KIRKWOOD
 448         bool "Marvell Kirkwood"
 449         select CPU_FEROCEON
 450         select PCI
 451         select GENERIC_GPIO
 452         select ARCH_REQUIRE_GPIOLIB
 453         select GENERIC_TIME
 454         select GENERIC_CLOCKEVENTS
 455         select PLAT_ORION
 456         help
 457           Support for the following Marvell Kirkwood series SoCs:
 458           88F6180, 88F6192 and 88F6281.
 459
 460 config ARCH_LOKI
 461         bool "Marvell Loki (88RC8480)"
 462         select CPU_FEROCEON
 463         select GENERIC_TIME
 464         select GENERIC_CLOCKEVENTS
 465         select PLAT_ORION
 466         help
 467           Support for the Marvell Loki (88RC8480) SoC.
 468
 469 config ARCH_MV78XX0
 470         bool "Marvell MV78xx0"
 471         select CPU_FEROCEON
 472         select PCI
 473         select GENERIC_GPIO
 474         select ARCH_REQUIRE_GPIOLIB
 475         select GENERIC_TIME
 476         select GENERIC_CLOCKEVENTS
 477         select PLAT_ORION
 478         help
 479           Support for the following Marvell MV78xx0 series SoCs:
 480           MV781x0, MV782x0.
 481
 482 config ARCH_ORION5X
 483         bool "Marvell Orion"
 484         depends on MMU
 485         select CPU_FEROCEON
 486         select PCI
 487         select GENERIC_GPIO
 488         select ARCH_REQUIRE_GPIOLIB
 489         select GENERIC_TIME
 490         select GENERIC_CLOCKEVENTS
 491         select PLAT_ORION
 492         help
 493           Support for the following Marvell Orion 5x series SoCs:
 494           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 495           Orion-2 (5281), Orion-1-90 (6183).
 496
 497 config ARCH_MMP
 498         bool "Marvell PXA168/910"
 499         depends on MMU
 500         select GENERIC_GPIO
 501         select ARCH_REQUIRE_GPIOLIB
 502         select HAVE_CLK
 503         select COMMON_CLKDEV
 504         select GENERIC_TIME
 505         select GENERIC_CLOCKEVENTS
 506         select TICK_ONESHOT
 507         select PLAT_PXA
 508         help
 509           Support for Marvell's PXA168/910 processor line.
 510
 511 config ARCH_KS8695
 512         bool "Micrel/Kendin KS8695"
 513         select CPU_ARM922T
 514         select GENERIC_GPIO
 515         select ARCH_REQUIRE_GPIOLIB
 516         help
 517           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 518           System-on-Chip devices.
 519
 520 config ARCH_NS9XXX
 521         bool "NetSilicon NS9xxx"
 522         select CPU_ARM926T
 523         select GENERIC_GPIO
 524         select GENERIC_TIME
 525         select GENERIC_CLOCKEVENTS
 526         select HAVE_CLK
 527         help
 528           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 529           System.
 530
 531           <http://www.digi.com/products/microprocessors/index.jsp>
 532
 533 config ARCH_W90X900
 534         bool "Nuvoton W90X900 CPU"
 535         select CPU_ARM926T
 536         select ARCH_REQUIRE_GPIOLIB
 537         select GENERIC_GPIO
 538         select HAVE_CLK
 539         select COMMON_CLKDEV
 540         select GENERIC_TIME
 541         select GENERIC_CLOCKEVENTS
 542         help
 543           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 544           At present, the w90x900 has been renamed nuc900, regarding
 545           the ARM series product line, you can login the following
 546           link address to know more.
 547
 548           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 549                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 550
 551 config ARCH_PNX4008
 552         bool "Philips Nexperia PNX4008 Mobile"
 553         select CPU_ARM926T
 554         select HAVE_CLK
 555         help
 556           This enables support for Philips PNX4008 mobile platform.
 557
 558 config ARCH_PXA
 559         bool "PXA2xx/PXA3xx-based"
 560         depends on MMU
 561         select ARCH_MTD_XIP
 562         select ARCH_HAS_CPUFREQ
 563         select GENERIC_GPIO
 564         select HAVE_CLK
 565         select COMMON_CLKDEV
 566         select ARCH_REQUIRE_GPIOLIB
 567         select GENERIC_TIME
 568         select GENERIC_CLOCKEVENTS
 569         select TICK_ONESHOT
 570         select PLAT_PXA
 571         help
 572           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 573
 574 config ARCH_MSM
 575         bool "Qualcomm MSM"
 576         select CPU_V6
 577         select GENERIC_TIME
 578         select GENERIC_CLOCKEVENTS
 579         help
 580           Support for Qualcomm MSM7K based systems.  This runs on the ARM11
 581           apps processor of the MSM7K and depends on a shared memory
 582           interface to the ARM9 modem processor which runs the baseband stack
 583           and controls some vital subsystems (clock and power control, etc).
 584
 585 config ARCH_RPC
 586         bool "RiscPC"
 587         select ARCH_ACORN
 588         select FIQ
 589         select TIMER_ACORN
 590         select ARCH_MAY_HAVE_PC_FDC
 591         select HAVE_PATA_PLATFORM
 592         select ISA_DMA_API
 593         select NO_IOPORT
 594         select ARCH_SPARSEMEM_ENABLE
 595         help
 596           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 597           CD-ROM interface, serial and parallel port, and the floppy drive.
 598
 599 config ARCH_SA1100
 600         bool "SA1100-based"
 601         select CPU_SA1100
 602         select ISA
 603         select ARCH_SPARSEMEM_ENABLE
 604         select ARCH_MTD_XIP
 605         select ARCH_HAS_CPUFREQ
 606         select CPU_FREQ
 607         select GENERIC_GPIO
 608         select GENERIC_TIME
 609         select GENERIC_CLOCKEVENTS
 610         select HAVE_CLK
 611         select TICK_ONESHOT
 612         select ARCH_REQUIRE_GPIOLIB
 613         help
 614           Support for StrongARM 11x0 based boards.
 615
 616 config ARCH_S3C2410
 617         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 618         select GENERIC_GPIO
 619         select ARCH_HAS_CPUFREQ
 620         select HAVE_CLK
 621         help
 622           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 623           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 624           the Samsung SMDK2410 development board (and derivatives).
 625
 626 config ARCH_S3C64XX
 627         bool "Samsung S3C64XX"
 628         select GENERIC_GPIO
 629         select HAVE_CLK
 630         select ARCH_HAS_CPUFREQ
 631         help
 632           Samsung S3C64XX series based systems
 633
 634 config ARCH_S5PC1XX
 635         bool "Samsung S5PC1XX"
 636         select GENERIC_GPIO
 637         select HAVE_CLK
 638         select CPU_V7
 639         help
 640           Samsung S5PC1XX series based systems
 641
 642 config ARCH_SHARK
 643         bool "Shark"
 644         select CPU_SA110
 645         select ISA
 646         select ISA_DMA
 647         select ZONE_DMA
 648         select PCI
 649         help
 650           Support for the StrongARM based Digital DNARD machine, also known
 651           as "Shark" (<http://www.shark-linux.de/shark.html>).
 652
 653 config ARCH_LH7A40X
 654         bool "Sharp LH7A40X"
 655         select CPU_ARM922T
 656         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 657         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 658         help
 659           Say Y here for systems based on one of the Sharp LH7A40X
 660           System on a Chip processors.  These CPUs include an ARM922T
 661           core with a wide array of integrated devices for
 662           hand-held and low-power applications.
 663
 664 config ARCH_U300
 665         bool "ST-Ericsson U300 Series"
 666         depends on MMU
 667         select CPU_ARM926T
 668         select HAVE_TCM
 669         select ARM_AMBA
 670         select ARM_VIC
 671         select GENERIC_TIME
 672         select GENERIC_CLOCKEVENTS
 673         select HAVE_CLK
 674         select COMMON_CLKDEV
 675         select GENERIC_GPIO
 676         help
 677           Support for ST-Ericsson U300 series mobile platforms.
 678
 679 config ARCH_DAVINCI
 680         bool "TI DaVinci"
 681         select CPU_ARM926T
 682         select GENERIC_TIME
 683         select GENERIC_CLOCKEVENTS
 684         select GENERIC_GPIO
 685         select ARCH_REQUIRE_GPIOLIB
 686         select HAVE_CLK
 687         select ZONE_DMA
 688         select HAVE_IDE
 689         select COMMON_CLKDEV
 690         select GENERIC_ALLOCATOR
 691         help
 692           Support for TI's DaVinci platform.
 693
 694 config ARCH_OMAP
 695         bool "TI OMAP"
 696         select GENERIC_GPIO
 697         select HAVE_CLK
 698         select ARCH_REQUIRE_GPIOLIB
 699         select ARCH_HAS_CPUFREQ
 700         select GENERIC_TIME
 701         select GENERIC_CLOCKEVENTS
 702         help
 703           Support for TI's OMAP platform (OMAP1 and OMAP2).
 704
 705 config ARCH_BCMRING
 706         bool "Broadcom BCMRING"
 707         depends on MMU
 708         select CPU_V6
 709         select ARM_AMBA
 710         select COMMON_CLKDEV
 711         select GENERIC_TIME
 712         select GENERIC_CLOCKEVENTS
 713         select ARCH_WANT_OPTIONAL_GPIOLIB
 714         help
 715           Support for Broadcom's BCMRing platform.
 716
 717 config ARCH_U8500
 718         bool "ST-Ericsson U8500 Series"
 719         select CPU_V7
 720         select ARM_AMBA
 721         select GENERIC_TIME
 722         select GENERIC_CLOCKEVENTS
 723         select COMMON_CLKDEV
 724         help
 725           Support for ST-Ericsson's Ux500 architecture
 726
 727 endchoice
 728
 729 source "arch/arm/mach-clps711x/Kconfig"
 730
 731 source "arch/arm/mach-ep93xx/Kconfig"
 732
 733 source "arch/arm/mach-footbridge/Kconfig"
 734
 735 source "arch/arm/mach-gemini/Kconfig"
 736
 737 source "arch/arm/mach-integrator/Kconfig"
 738
 739 source "arch/arm/mach-iop32x/Kconfig"
 740
 741 source "arch/arm/mach-iop33x/Kconfig"
 742
 743 source "arch/arm/mach-iop13xx/Kconfig"
 744
 745 source "arch/arm/mach-ixp4xx/Kconfig"
 746
 747 source "arch/arm/mach-ixp2000/Kconfig"
 748
 749 source "arch/arm/mach-ixp23xx/Kconfig"
 750
 751 source "arch/arm/mach-loki/Kconfig"
 752
 753 source "arch/arm/mach-mv78xx0/Kconfig"
 754
 755 source "arch/arm/mach-pxa/Kconfig"
 756 source "arch/arm/plat-pxa/Kconfig"
 757
 758 source "arch/arm/mach-mmp/Kconfig"
 759
 760 source "arch/arm/mach-sa1100/Kconfig"
 761
 762 source "arch/arm/plat-omap/Kconfig"
 763
 764 source "arch/arm/mach-omap1/Kconfig"
 765
 766 source "arch/arm/mach-omap2/Kconfig"
 767
 768 source "arch/arm/mach-orion5x/Kconfig"
 769
 770 source "arch/arm/mach-kirkwood/Kconfig"
 771
 772 source "arch/arm/mach-dove/Kconfig"
 773
 774 source "arch/arm/plat-samsung/Kconfig"
 775 source "arch/arm/plat-s3c24xx/Kconfig"
 776 source "arch/arm/plat-s3c64xx/Kconfig"
 777 source "arch/arm/plat-s3c/Kconfig"
 778 source "arch/arm/plat-s5pc1xx/Kconfig"
 779
 780 if ARCH_S3C2410
 781 source "arch/arm/mach-s3c2400/Kconfig"
 782 source "arch/arm/mach-s3c2410/Kconfig"
 783 source "arch/arm/mach-s3c2412/Kconfig"
 784 source "arch/arm/mach-s3c2440/Kconfig"
 785 source "arch/arm/mach-s3c2442/Kconfig"
 786 source "arch/arm/mach-s3c2443/Kconfig"
 787 endif
 788
 789 if ARCH_S3C64XX
 790 source "arch/arm/mach-s3c6400/Kconfig"
 791 source "arch/arm/mach-s3c6410/Kconfig"
 792 endif
 793
 794 source "arch/arm/plat-stmp3xxx/Kconfig"
 795
 796 if ARCH_S5PC1XX
 797 source "arch/arm/mach-s5pc100/Kconfig"
 798 endif
 799
 800 source "arch/arm/mach-lh7a40x/Kconfig"
 801
 802 source "arch/arm/mach-h720x/Kconfig"
 803
 804 source "arch/arm/mach-versatile/Kconfig"
 805
 806 source "arch/arm/mach-aaec2000/Kconfig"
 807
 808 source "arch/arm/mach-realview/Kconfig"
 809
 810 source "arch/arm/mach-at91/Kconfig"
 811
 812 source "arch/arm/plat-mxc/Kconfig"
 813
 814 source "arch/arm/mach-nomadik/Kconfig"
 815 source "arch/arm/plat-nomadik/Kconfig"
 816
 817 source "arch/arm/mach-netx/Kconfig"
 818
 819 source "arch/arm/mach-ns9xxx/Kconfig"
 820
 821 source "arch/arm/mach-davinci/Kconfig"
 822
 823 source "arch/arm/mach-ks8695/Kconfig"
 824
 825 source "arch/arm/mach-msm/Kconfig"
 826
 827 source "arch/arm/mach-u300/Kconfig"
 828
 829 source "arch/arm/mach-w90x900/Kconfig"
 830
 831 source "arch/arm/mach-bcmring/Kconfig"
 832
 833 source "arch/arm/mach-ux500/Kconfig"
 834
 835 # Definitions to make life easier
 836 config ARCH_ACORN
 837         bool
 838
 839 config PLAT_IOP
 840         bool
 841         select GENERIC_CLOCKEVENTS
 842         select GENERIC_TIME
 843
 844 config PLAT_ORION
 845         bool
 846
 847 config PLAT_PXA
 848         bool
 849
 850 source arch/arm/mm/Kconfig
 851
 852 config IWMMXT
 853         bool "Enable iWMMXt support"
 854         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 855         default y if PXA27x || PXA3xx || ARCH_MMP
 856         help
 857           Enable support for iWMMXt context switching at run time if
 858           running on a CPU that supports it.
 859
 860 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 861 config XSCALE_PMU
 862         bool
 863         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 864         default y
 865
 866 if !MMU
 867 source "arch/arm/Kconfig-nommu"
 868 endif
 869
 870 config ARM_ERRATA_411920
 871         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 872         depends on CPU_V6 && !SMP
 873         help
 874           Invalidation of the Instruction Cache operation can
 875           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 876           It does not affect the MPCore. This option enables the ARM Ltd.
 877           recommended workaround.
 878
 879 config ARM_ERRATA_430973
 880         bool "ARM errata: Stale prediction on replaced interworking branch"
 881         depends on CPU_V7
 882         help
 883           This option enables the workaround for the 430973 Cortex-A8
 884           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 885           interworking branch is replaced with another code sequence at the
 886           same virtual address, whether due to self-modifying code or virtual
 887           to physical address re-mapping, Cortex-A8 does not recover from the
 888           stale interworking branch prediction. This results in Cortex-A8
 889           executing the new code sequence in the incorrect ARM or Thumb state.
 890           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 891           and also flushes the branch target cache at every context switch.
 892           Note that setting specific bits in the ACTLR register may not be
 893           available in non-secure mode.
 894
 895 config ARM_ERRATA_458693
 896         bool "ARM errata: Processor deadlock when a false hazard is created"
 897         depends on CPU_V7
 898         help
 899           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
 900           erratum. For very specific sequences of memory operations, it is
 901           possible for a hazard condition intended for a cache line to instead
 902           be incorrectly associated with a different cache line. This false
 903           hazard might then cause a processor deadlock. The workaround enables
 904           the L1 caching of the NEON accesses and disables the PLD instruction
 905           in the ACTLR register. Note that setting specific bits in the ACTLR
 906           register may not be available in non-secure mode.
 907
 908 config ARM_ERRATA_460075
 909         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
 910         depends on CPU_V7
 911         help
 912           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
 913           erratum. Any asynchronous access to the L2 cache may encounter a
 914           situation in which recent store transactions to the L2 cache are lost
 915           and overwritten with stale memory contents from external memory. The
 916           workaround disables the write-allocate mode for the L2 cache via the
 917           ACTLR register. Note that setting specific bits in the ACTLR register
 918           may not be available in non-secure mode.
 919
 920 endmenu
 921
 922 source "arch/arm/common/Kconfig"
 923
 924 config FORCE_MAX_ZONEORDER
 925         int
 926         depends on SA1111
 927         default "9"
 928
 929 menu "Bus support"
 930
 931 config ARM_AMBA
 932         bool
 933
 934 config ISA
 935         bool
 936         help
 937           Find out whether you have ISA slots on your motherboard.  ISA is the
 938           name of a bus system, i.e. the way the CPU talks to the other stuff
 939           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 940           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 941           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 942
 943 # Select ISA DMA controller support
 944 config ISA_DMA
 945         bool
 946         select ISA_DMA_API
 947
 948 # Select ISA DMA interface
 949 config ISA_DMA_API
 950         bool
 951
 952 config PCI
 953         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 954         help
 955           Find out whether you have a PCI motherboard. PCI is the name of a
 956           bus system, i.e. the way the CPU talks to the other stuff inside
 957           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 958           VESA. If you have PCI, say Y, otherwise N.
 959
 960 config PCI_SYSCALL
 961         def_bool PCI
 962
 963 # Select the host bridge type
 964 config PCI_HOST_VIA82C505
 965         bool
 966         depends on PCI && ARCH_SHARK
 967         default y
 968
 969 config PCI_HOST_ITE8152
 970         bool
 971         depends on PCI && MACH_ARMCORE
 972         default y
 973         select DMABOUNCE
 974
 975 source "drivers/pci/Kconfig"
 976
 977 source "drivers/pcmcia/Kconfig"
 978
 979 endmenu
 980
 981 menu "Kernel Features"
 982
 983 source "kernel/time/Kconfig"
 984
 985 config SMP
 986         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 987         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
 988                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
 989         depends on GENERIC_CLOCKEVENTS
 990         select USE_GENERIC_SMP_HELPERS
 991         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
 992         help
 993           This enables support for systems with more than one CPU. If you have
 994           a system with only one CPU, like most personal computers, say N. If
 995           you have a system with more than one CPU, say Y.
 996
 997           If you say N here, the kernel will run on single and multiprocessor
 998           machines, but will use only one CPU of a multiprocessor machine. If
 999           you say Y here, the kernel will run on many, but not all, single
1000           processor machines. On a single processor machine, the kernel will
1001           run faster if you say N here.
1002
1003           See also <file:Documentation/i386/IO-APIC.txt>,
1004           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1005           <http://www.linuxdoc.org/docs.html#howto>.
1006
1007           If you don't know what to do here, say N.
1008
1009 config HAVE_ARM_SCU
1010         bool
1011         depends on SMP
1012         help
1013           This option enables support for the ARM system coherency unit
1014
1015 config HAVE_ARM_TWD
1016         bool
1017         depends on SMP
1018         help
1019           This options enables support for the ARM timer and watchdog unit
1020
1021 choice
1022         prompt "Memory split"
1023         default VMSPLIT_3G
1024         help
1025           Select the desired split between kernel and user memory.
1026
1027           If you are not absolutely sure what you are doing, leave this
1028           option alone!
1029
1030         config VMSPLIT_3G
1031                 bool "3G/1G user/kernel split"
1032         config VMSPLIT_2G
1033                 bool "2G/2G user/kernel split"
1034         config VMSPLIT_1G
1035                 bool "1G/3G user/kernel split"
1036 endchoice
1037
1038 config PAGE_OFFSET
1039         hex
1040         default 0x40000000 if VMSPLIT_1G
1041         default 0x80000000 if VMSPLIT_2G
1042         default 0xC0000000
1043
1044 config NR_CPUS
1045         int "Maximum number of CPUs (2-32)"
1046         range 2 32
1047         depends on SMP
1048         default "4"
1049
1050 config HOTPLUG_CPU
1051         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1052         depends on SMP && HOTPLUG && EXPERIMENTAL
1053         help
1054           Say Y here to experiment with turning CPUs off and on.  CPUs
1055           can be controlled through /sys/devices/system/cpu.
1056
1057 config LOCAL_TIMERS
1058         bool "Use local timer interrupts"
1059         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1060                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1061         default y
1062         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1063         help
1064           Enable support for local timers on SMP platforms, rather then the
1065           legacy IPI broadcast method.  Local timers allows the system
1066           accounting to be spread across the timer interval, preventing a
1067           "thundering herd" at every timer tick.
1068
1069 source kernel/Kconfig.preempt
1070
1071 config HZ
1072         int
1073         default 128 if ARCH_L7200
1074         default 200 if ARCH_EBSA110 || ARCH_S3C2410
1075         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1076         default AT91_TIMER_HZ if ARCH_AT91
1077         default 100
1078
1079 config THUMB2_KERNEL
1080         bool "Compile the kernel in Thumb-2 mode"
1081         depends on CPU_V7 && EXPERIMENTAL
1082         select AEABI
1083         select ARM_ASM_UNIFIED
1084         help
1085           By enabling this option, the kernel will be compiled in
1086           Thumb-2 mode. A compiler/assembler that understand the unified
1087           ARM-Thumb syntax is needed.
1088
1089           If unsure, say N.
1090
1091 config ARM_ASM_UNIFIED
1092         bool
1093
1094 config AEABI
1095         bool "Use the ARM EABI to compile the kernel"
1096         help
1097           This option allows for the kernel to be compiled using the latest
1098           ARM ABI (aka EABI).  This is only useful if you are using a user
1099           space environment that is also compiled with EABI.
1100
1101           Since there are major incompatibilities between the legacy ABI and
1102           EABI, especially with regard to structure member alignment, this
1103           option also changes the kernel syscall calling convention to
1104           disambiguate both ABIs and allow for backward compatibility support
1105           (selected with CONFIG_OABI_COMPAT).
1106
1107           To use this you need GCC version 4.0.0 or later.
1108
1109 config OABI_COMPAT
1110         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1111         depends on AEABI && EXPERIMENTAL
1112         default y
1113         help
1114           This option preserves the old syscall interface along with the
1115           new (ARM EABI) one. It also provides a compatibility layer to
1116           intercept syscalls that have structure arguments which layout
1117           in memory differs between the legacy ABI and the new ARM EABI
1118           (only for non "thumb" binaries). This option adds a tiny
1119           overhead to all syscalls and produces a slightly larger kernel.
1120           If you know you'll be using only pure EABI user space then you
1121           can say N here. If this option is not selected and you attempt
1122           to execute a legacy ABI binary then the result will be
1123           UNPREDICTABLE (in fact it can be predicted that it won't work
1124           at all). If in doubt say Y.
1125
1126 config ARCH_HAS_HOLES_MEMORYMODEL
1127         bool
1128
1129 # Discontigmem is deprecated
1130 config ARCH_DISCONTIGMEM_ENABLE
1131         bool
1132
1133 config ARCH_SPARSEMEM_ENABLE
1134         bool
1135
1136 config ARCH_SPARSEMEM_DEFAULT
1137         def_bool ARCH_SPARSEMEM_ENABLE
1138
1139 config ARCH_SELECT_MEMORY_MODEL
1140         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1141
1142 config NODES_SHIFT
1143         int
1144         default "4" if ARCH_LH7A40X
1145         default "2"
1146         depends on NEED_MULTIPLE_NODES
1147
1148 config HIGHMEM
1149         bool "High Memory Support (EXPERIMENTAL)"
1150         depends on MMU && EXPERIMENTAL
1151         help
1152           The address space of ARM processors is only 4 Gigabytes large
1153           and it has to accommodate user address space, kernel address
1154           space as well as some memory mapped IO. That means that, if you
1155           have a large amount of physical memory and/or IO, not all of the
1156           memory can be "permanently mapped" by the kernel. The physical
1157           memory that is not permanently mapped is called "high memory".
1158
1159           Depending on the selected kernel/user memory split, minimum
1160           vmalloc space and actual amount of RAM, you may not need this
1161           option which should result in a slightly faster kernel.
1162
1163           If unsure, say n.
1164
1165 config HIGHPTE
1166         bool "Allocate 2nd-level pagetables from highmem"
1167         depends on HIGHMEM
1168         depends on !OUTER_CACHE
1169
1170 source "mm/Kconfig"
1171
1172 config LEDS
1173         bool "Timer and CPU usage LEDs"
1174         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1175                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1176                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1177                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1178                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1179                    ARCH_AT91 || ARCH_DAVINCI || \
1180                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1181         help
1182           If you say Y here, the LEDs on your machine will be used
1183           to provide useful information about your current system status.
1184
1185           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1186           be able to select which LEDs are active using the options below. If
1187           you are compiling a kernel for the EBSA-110 or the LART however, the
1188           red LED will simply flash regularly to indicate that the system is
1189           still functional. It is safe to say Y here if you have a CATS
1190           system, but the driver will do nothing.
1191
1192 config LEDS_TIMER
1193         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1194                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1195                             || MACH_OMAP_PERSEUS2
1196         depends on LEDS
1197         depends on !GENERIC_CLOCKEVENTS
1198         default y if ARCH_EBSA110
1199         help
1200           If you say Y here, one of the system LEDs (the green one on the
1201           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1202           will flash regularly to indicate that the system is still
1203           operational. This is mainly useful to kernel hackers who are
1204           debugging unstable kernels.
1205
1206           The LART uses the same LED for both Timer LED and CPU usage LED
1207           functions. You may choose to use both, but the Timer LED function
1208           will overrule the CPU usage LED.
1209
1210 config LEDS_CPU
1211         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1212                         !ARCH_OMAP) \
1213                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1214                         || MACH_OMAP_PERSEUS2
1215         depends on LEDS
1216         help
1217           If you say Y here, the red LED will be used to give a good real
1218           time indication of CPU usage, by lighting whenever the idle task
1219           is not currently executing.
1220
1221           The LART uses the same LED for both Timer LED and CPU usage LED
1222           functions. You may choose to use both, but the Timer LED function
1223           will overrule the CPU usage LED.
1224
1225 config ALIGNMENT_TRAP
1226         bool
1227         depends on CPU_CP15_MMU
1228         default y if !ARCH_EBSA110
1229         help
1230           ARM processors cannot fetch/store information which is not
1231           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1232           address divisible by 4. On 32-bit ARM processors, these non-aligned
1233           fetch/store instructions will be emulated in software if you say
1234           here, which has a severe performance impact. This is necessary for
1235           correct operation of some network protocols. With an IP-only
1236           configuration it is safe to say N, otherwise say Y.
1237
1238 config UACCESS_WITH_MEMCPY
1239         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1240         depends on MMU && EXPERIMENTAL
1241         default y if CPU_FEROCEON
1242         help
1243           Implement faster copy_to_user and clear_user methods for CPU
1244           cores where a 8-word STM instruction give significantly higher
1245           memory write throughput than a sequence of individual 32bit stores.
1246
1247           A possible side effect is a slight increase in scheduling latency
1248           between threads sharing the same address space if they invoke
1249           such copy operations with large buffers.
1250
1251           However, if the CPU data cache is using a write-allocate mode,
1252           this option is unlikely to provide any performance gain.
1253
1254 endmenu
1255
1256 menu "Boot options"
1257
1258 # Compressed boot loader in ROM.  Yes, we really want to ask about
1259 # TEXT and BSS so we preserve their values in the config files.
1260 config ZBOOT_ROM_TEXT
1261         hex "Compressed ROM boot loader base address"
1262         default "0"
1263         help
1264           The physical address at which the ROM-able zImage is to be
1265           placed in the target.  Platforms which normally make use of
1266           ROM-able zImage formats normally set this to a suitable
1267           value in their defconfig file.
1268
1269           If ZBOOT_ROM is not enabled, this has no effect.
1270
1271 config ZBOOT_ROM_BSS
1272         hex "Compressed ROM boot loader BSS address"
1273         default "0"
1274         help
1275           The base address of an area of read/write memory in the target
1276           for the ROM-able zImage which must be available while the
1277           decompressor is running. It must be large enough to hold the
1278           entire decompressed kernel plus an additional 128 KiB.
1279           Platforms which normally make use of ROM-able zImage formats
1280           normally set this to a suitable value in their defconfig file.
1281
1282           If ZBOOT_ROM is not enabled, this has no effect.
1283
1284 config ZBOOT_ROM
1285         bool "Compressed boot loader in ROM/flash"
1286         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1287         help
1288           Say Y here if you intend to execute your compressed kernel image
1289           (zImage) directly from ROM or flash.  If unsure, say N.
1290
1291 config CMDLINE
1292         string "Default kernel command string"
1293         default ""
1294         help
1295           On some architectures (EBSA110 and CATS), there is currently no way
1296           for the boot loader to pass arguments to the kernel. For these
1297           architectures, you should supply some command-line options at build
1298           time by entering them here. As a minimum, you should specify the
1299           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1300
1301 config XIP_KERNEL
1302         bool "Kernel Execute-In-Place from ROM"
1303         depends on !ZBOOT_ROM
1304         help
1305           Execute-In-Place allows the kernel to run from non-volatile storage
1306           directly addressable by the CPU, such as NOR flash. This saves RAM
1307           space since the text section of the kernel is not loaded from flash
1308           to RAM.  Read-write sections, such as the data section and stack,
1309           are still copied to RAM.  The XIP kernel is not compressed since
1310           it has to run directly from flash, so it will take more space to
1311           store it.  The flash address used to link the kernel object files,
1312           and for storing it, is configuration dependent. Therefore, if you
1313           say Y here, you must know the proper physical address where to
1314           store the kernel image depending on your own flash memory usage.
1315
1316           Also note that the make target becomes "make xipImage" rather than
1317           "make zImage" or "make Image".  The final kernel binary to put in
1318           ROM memory will be arch/arm/boot/xipImage.
1319
1320           If unsure, say N.
1321
1322 config XIP_PHYS_ADDR
1323         hex "XIP Kernel Physical Location"
1324         depends on XIP_KERNEL
1325         default "0x00080000"
1326         help
1327           This is the physical address in your flash memory the kernel will
1328           be linked for and stored to.  This address is dependent on your
1329           own flash usage.
1330
1331 config KEXEC
1332         bool "Kexec system call (EXPERIMENTAL)"
1333         depends on EXPERIMENTAL
1334         help
1335           kexec is a system call that implements the ability to shutdown your
1336           current kernel, and to start another kernel.  It is like a reboot
1337           but it is independent of the system firmware.   And like a reboot
1338           you can start any kernel with it, not just Linux.
1339
1340           It is an ongoing process to be certain the hardware in a machine
1341           is properly shutdown, so do not be surprised if this code does not
1342           initially work for you.  It may help to enable device hotplugging
1343           support.
1344
1345 config ATAGS_PROC
1346         bool "Export atags in procfs"
1347         depends on KEXEC
1348         default y
1349         help
1350           Should the atags used to boot the kernel be exported in an "atags"
1351           file in procfs. Useful with kexec.
1352
1353 endmenu
1354
1355 menu "CPU Power Management"
1356
1357 if ARCH_HAS_CPUFREQ
1358
1359 source "drivers/cpufreq/Kconfig"
1360
1361 config CPU_FREQ_SA1100
1362         bool
1363
1364 config CPU_FREQ_SA1110
1365         bool
1366
1367 config CPU_FREQ_INTEGRATOR
1368         tristate "CPUfreq driver for ARM Integrator CPUs"
1369         depends on ARCH_INTEGRATOR && CPU_FREQ
1370         default y
1371         help
1372           This enables the CPUfreq driver for ARM Integrator CPUs.
1373
1374           For details, take a look at <file:Documentation/cpu-freq>.
1375
1376           If in doubt, say Y.
1377
1378 config CPU_FREQ_PXA
1379         bool
1380         depends on CPU_FREQ && ARCH_PXA && PXA25x
1381         default y
1382         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1383
1384 config CPU_FREQ_S3C64XX
1385         bool "CPUfreq support for Samsung S3C64XX CPUs"
1386         depends on CPU_FREQ && CPU_S3C6410
1387
1388 config CPU_FREQ_S3C
1389         bool
1390         help
1391           Internal configuration node for common cpufreq on Samsung SoC
1392
1393 config CPU_FREQ_S3C24XX
1394         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1395         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1396         select CPU_FREQ_S3C
1397         help
1398           This enables the CPUfreq driver for the Samsung S3C24XX family
1399           of CPUs.
1400
1401           For details, take a look at <file:Documentation/cpu-freq>.
1402
1403           If in doubt, say N.
1404
1405 config CPU_FREQ_S3C24XX_PLL
1406         bool "Support CPUfreq changing of PLL frequency"
1407         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1408         help
1409           Compile in support for changing the PLL frequency from the
1410           S3C24XX series CPUfreq driver. The PLL takes time to settle
1411           after a frequency change, so by default it is not enabled.
1412
1413           This also means that the PLL tables for the selected CPU(s) will
1414           be built which may increase the size of the kernel image.
1415
1416 config CPU_FREQ_S3C24XX_DEBUG
1417         bool "Debug CPUfreq Samsung driver core"
1418         depends on CPU_FREQ_S3C24XX
1419         help
1420           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1421
1422 config CPU_FREQ_S3C24XX_IODEBUG
1423         bool "Debug CPUfreq Samsung driver IO timing"
1424         depends on CPU_FREQ_S3C24XX
1425         help
1426           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1427
1428 config CPU_FREQ_S3C24XX_DEBUGFS
1429         bool "Export debugfs for CPUFreq"
1430         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1431         help
1432           Export status information via debugfs.
1433
1434 endif
1435
1436 source "drivers/cpuidle/Kconfig"
1437
1438 endmenu
1439
1440 menu "Floating point emulation"
1441
1442 comment "At least one emulation must be selected"
1443
1444 config FPE_NWFPE
1445         bool "NWFPE math emulation"
1446         depends on !AEABI || OABI_COMPAT
1447         ---help---
1448           Say Y to include the NWFPE floating point emulator in the kernel.
1449           This is necessary to run most binaries. Linux does not currently
1450           support floating point hardware so you need to say Y here even if
1451           your machine has an FPA or floating point co-processor podule.
1452
1453           You may say N here if you are going to load the Acorn FPEmulator
1454           early in the bootup.
1455
1456 config FPE_NWFPE_XP
1457         bool "Support extended precision"
1458         depends on FPE_NWFPE
1459         help
1460           Say Y to include 80-bit support in the kernel floating-point
1461           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1462           Note that gcc does not generate 80-bit operations by default,
1463           so in most cases this option only enlarges the size of the
1464           floating point emulator without any good reason.
1465
1466           You almost surely want to say N here.
1467
1468 config FPE_FASTFPE
1469         bool "FastFPE math emulation (EXPERIMENTAL)"
1470         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1471         ---help---
1472           Say Y here to include the FAST floating point emulator in the kernel.
1473           This is an experimental much faster emulator which now also has full
1474           precision for the mantissa.  It does not support any exceptions.
1475           It is very simple, and approximately 3-6 times faster than NWFPE.
1476
1477           It should be sufficient for most programs.  It may be not suitable
1478           for scientific calculations, but you have to check this for yourself.
1479           If you do not feel you need a faster FP emulation you should better
1480           choose NWFPE.
1481
1482 config VFP
1483         bool "VFP-format floating point maths"
1484         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1485         help
1486           Say Y to include VFP support code in the kernel. This is needed
1487           if your hardware includes a VFP unit.
1488
1489           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1490           release notes and additional status information.
1491
1492           Say N if your target does not have VFP hardware.
1493
1494 config VFPv3
1495         bool
1496         depends on VFP
1497         default y if CPU_V7
1498
1499 config NEON
1500         bool "Advanced SIMD (NEON) Extension support"
1501         depends on VFPv3 && CPU_V7
1502         help
1503           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1504           Extension.
1505
1506 endmenu
1507
1508 menu "Userspace binary formats"
1509
1510 source "fs/Kconfig.binfmt"
1511
1512 config ARTHUR
1513         tristate "RISC OS personality"
1514         depends on !AEABI
1515         help
1516           Say Y here to include the kernel code necessary if you want to run
1517           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1518           experimental; if this sounds frightening, say N and sleep in peace.
1519           You can also say M here to compile this support as a module (which
1520           will be called arthur).
1521
1522 endmenu
1523
1524 menu "Power management options"
1525
1526 source "kernel/power/Kconfig"
1527
1528 config ARCH_SUSPEND_POSSIBLE
1529         def_bool y
1530
1531 endmenu
1532
1533 source "net/Kconfig"
1534
1535 source "drivers/Kconfig"
1536
1537 source "fs/Kconfig"
1538
1539 source "arch/arm/Kconfig.debug"
1540
1541 source "security/Kconfig"
1542
1543 source "crypto/Kconfig"
1544
1545 source "lib/Kconfig"