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 PLAT_S3C
 631         select CPU_V6
 632         select GENERIC_GPIO
 633         select ARM_VIC
 634         select HAVE_CLK
 635         select NO_IOPORT
 636         select ARCH_HAS_CPUFREQ
 637         select ARCH_REQUIRE_GPIOLIB
 638         select SAMSUNG_CLKSRC
 639         select SAMSUNG_IRQ_VIC_TIMER
 640         select SAMSUNG_IRQ_UART
 641         select S3C_GPIO_TRACK
 642         select S3C_GPIO_PULL_UPDOWN
 643         select S3C_GPIO_CFG_S3C24XX
 644         select S3C_GPIO_CFG_S3C64XX
 645         select S3C_DEV_NAND
 646         select USB_ARCH_HAS_OHCI
 647         select SAMSUNG_GPIOLIB_4BIT
 648         help
 649           Samsung S3C64XX series based systems
 650
 651 config ARCH_S5P6440
 652         bool "Samsung S5P6440"
 653         select CPU_V6
 654         select GENERIC_GPIO
 655         select HAVE_CLK
 656         help
 657           Samsung S5P6440 CPU based systems
 658
 659 config ARCH_S5PC1XX
 660         bool "Samsung S5PC1XX"
 661         select GENERIC_GPIO
 662         select HAVE_CLK
 663         select CPU_V7
 664         help
 665           Samsung S5PC1XX series based systems
 666
 667 config ARCH_SHARK
 668         bool "Shark"
 669         select CPU_SA110
 670         select ISA
 671         select ISA_DMA
 672         select ZONE_DMA
 673         select PCI
 674         help
 675           Support for the StrongARM based Digital DNARD machine, also known
 676           as "Shark" (<http://www.shark-linux.de/shark.html>).
 677
 678 config ARCH_LH7A40X
 679         bool "Sharp LH7A40X"
 680         select CPU_ARM922T
 681         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 682         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 683         help
 684           Say Y here for systems based on one of the Sharp LH7A40X
 685           System on a Chip processors.  These CPUs include an ARM922T
 686           core with a wide array of integrated devices for
 687           hand-held and low-power applications.
 688
 689 config ARCH_U300
 690         bool "ST-Ericsson U300 Series"
 691         depends on MMU
 692         select CPU_ARM926T
 693         select HAVE_TCM
 694         select ARM_AMBA
 695         select ARM_VIC
 696         select GENERIC_TIME
 697         select GENERIC_CLOCKEVENTS
 698         select HAVE_CLK
 699         select COMMON_CLKDEV
 700         select GENERIC_GPIO
 701         help
 702           Support for ST-Ericsson U300 series mobile platforms.
 703
 704 config ARCH_DAVINCI
 705         bool "TI DaVinci"
 706         select CPU_ARM926T
 707         select GENERIC_TIME
 708         select GENERIC_CLOCKEVENTS
 709         select GENERIC_GPIO
 710         select ARCH_REQUIRE_GPIOLIB
 711         select HAVE_CLK
 712         select ZONE_DMA
 713         select HAVE_IDE
 714         select COMMON_CLKDEV
 715         select GENERIC_ALLOCATOR
 716         select ARCH_HAS_HOLES_MEMORYMODEL
 717         help
 718           Support for TI's DaVinci platform.
 719
 720 config ARCH_OMAP
 721         bool "TI OMAP"
 722         select GENERIC_GPIO
 723         select HAVE_CLK
 724         select ARCH_REQUIRE_GPIOLIB
 725         select ARCH_HAS_CPUFREQ
 726         select GENERIC_TIME
 727         select GENERIC_CLOCKEVENTS
 728         help
 729           Support for TI's OMAP platform (OMAP1 and OMAP2).
 730
 731 config ARCH_BCMRING
 732         bool "Broadcom BCMRING"
 733         depends on MMU
 734         select CPU_V6
 735         select ARM_AMBA
 736         select COMMON_CLKDEV
 737         select GENERIC_TIME
 738         select GENERIC_CLOCKEVENTS
 739         select ARCH_WANT_OPTIONAL_GPIOLIB
 740         help
 741           Support for Broadcom's BCMRing platform.
 742
 743 config ARCH_U8500
 744         bool "ST-Ericsson U8500 Series"
 745         select CPU_V7
 746         select ARM_AMBA
 747         select GENERIC_TIME
 748         select GENERIC_CLOCKEVENTS
 749         select COMMON_CLKDEV
 750         help
 751           Support for ST-Ericsson's Ux500 architecture
 752
 753 endchoice
 754
 755 source "arch/arm/mach-clps711x/Kconfig"
 756
 757 source "arch/arm/mach-ep93xx/Kconfig"
 758
 759 source "arch/arm/mach-footbridge/Kconfig"
 760
 761 source "arch/arm/mach-gemini/Kconfig"
 762
 763 source "arch/arm/mach-integrator/Kconfig"
 764
 765 source "arch/arm/mach-iop32x/Kconfig"
 766
 767 source "arch/arm/mach-iop33x/Kconfig"
 768
 769 source "arch/arm/mach-iop13xx/Kconfig"
 770
 771 source "arch/arm/mach-ixp4xx/Kconfig"
 772
 773 source "arch/arm/mach-ixp2000/Kconfig"
 774
 775 source "arch/arm/mach-ixp23xx/Kconfig"
 776
 777 source "arch/arm/mach-loki/Kconfig"
 778
 779 source "arch/arm/mach-mv78xx0/Kconfig"
 780
 781 source "arch/arm/mach-pxa/Kconfig"
 782 source "arch/arm/plat-pxa/Kconfig"
 783
 784 source "arch/arm/mach-mmp/Kconfig"
 785
 786 source "arch/arm/mach-sa1100/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-kirkwood/Kconfig"
 797
 798 source "arch/arm/mach-dove/Kconfig"
 799
 800 source "arch/arm/plat-samsung/Kconfig"
 801 source "arch/arm/plat-s3c24xx/Kconfig"
 802 source "arch/arm/plat-s3c/Kconfig"
 803 source "arch/arm/plat-s5p/Kconfig"
 804 source "arch/arm/plat-s5pc1xx/Kconfig"
 805
 806 if ARCH_S3C2410
 807 source "arch/arm/mach-s3c2400/Kconfig"
 808 source "arch/arm/mach-s3c2410/Kconfig"
 809 source "arch/arm/mach-s3c2412/Kconfig"
 810 source "arch/arm/mach-s3c2440/Kconfig"
 811 source "arch/arm/mach-s3c2443/Kconfig"
 812 endif
 813
 814 if ARCH_S3C64XX
 815 source "arch/arm/mach-s3c64xx/Kconfig"
 816 endif
 817
 818 source "arch/arm/mach-s5p6440/Kconfig"
 819
 820 source "arch/arm/plat-stmp3xxx/Kconfig"
 821
 822 if ARCH_S5PC1XX
 823 source "arch/arm/mach-s5pc100/Kconfig"
 824 endif
 825
 826 source "arch/arm/mach-lh7a40x/Kconfig"
 827
 828 source "arch/arm/mach-h720x/Kconfig"
 829
 830 source "arch/arm/mach-versatile/Kconfig"
 831
 832 source "arch/arm/mach-aaec2000/Kconfig"
 833
 834 source "arch/arm/mach-realview/Kconfig"
 835
 836 source "arch/arm/mach-at91/Kconfig"
 837
 838 source "arch/arm/plat-mxc/Kconfig"
 839
 840 source "arch/arm/mach-nomadik/Kconfig"
 841 source "arch/arm/plat-nomadik/Kconfig"
 842
 843 source "arch/arm/mach-netx/Kconfig"
 844
 845 source "arch/arm/mach-ns9xxx/Kconfig"
 846
 847 source "arch/arm/mach-davinci/Kconfig"
 848
 849 source "arch/arm/mach-ks8695/Kconfig"
 850
 851 source "arch/arm/mach-msm/Kconfig"
 852
 853 source "arch/arm/mach-u300/Kconfig"
 854
 855 source "arch/arm/mach-w90x900/Kconfig"
 856
 857 source "arch/arm/mach-bcmring/Kconfig"
 858
 859 source "arch/arm/mach-ux500/Kconfig"
 860
 861 # Definitions to make life easier
 862 config ARCH_ACORN
 863         bool
 864
 865 config PLAT_IOP
 866         bool
 867         select GENERIC_CLOCKEVENTS
 868         select GENERIC_TIME
 869
 870 config PLAT_ORION
 871         bool
 872
 873 config PLAT_PXA
 874         bool
 875
 876 source arch/arm/mm/Kconfig
 877
 878 config IWMMXT
 879         bool "Enable iWMMXt support"
 880         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 881         default y if PXA27x || PXA3xx || ARCH_MMP
 882         help
 883           Enable support for iWMMXt context switching at run time if
 884           running on a CPU that supports it.
 885
 886 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 887 config XSCALE_PMU
 888         bool
 889         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 890         default y
 891
 892 if !MMU
 893 source "arch/arm/Kconfig-nommu"
 894 endif
 895
 896 config ARM_ERRATA_411920
 897         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 898         depends on CPU_V6 && !SMP
 899         help
 900           Invalidation of the Instruction Cache operation can
 901           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 902           It does not affect the MPCore. This option enables the ARM Ltd.
 903           recommended workaround.
 904
 905 config ARM_ERRATA_430973
 906         bool "ARM errata: Stale prediction on replaced interworking branch"
 907         depends on CPU_V7
 908         help
 909           This option enables the workaround for the 430973 Cortex-A8
 910           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 911           interworking branch is replaced with another code sequence at the
 912           same virtual address, whether due to self-modifying code or virtual
 913           to physical address re-mapping, Cortex-A8 does not recover from the
 914           stale interworking branch prediction. This results in Cortex-A8
 915           executing the new code sequence in the incorrect ARM or Thumb state.
 916           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 917           and also flushes the branch target cache at every context switch.
 918           Note that setting specific bits in the ACTLR register may not be
 919           available in non-secure mode.
 920
 921 config ARM_ERRATA_458693
 922         bool "ARM errata: Processor deadlock when a false hazard is created"
 923         depends on CPU_V7
 924         help
 925           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
 926           erratum. For very specific sequences of memory operations, it is
 927           possible for a hazard condition intended for a cache line to instead
 928           be incorrectly associated with a different cache line. This false
 929           hazard might then cause a processor deadlock. The workaround enables
 930           the L1 caching of the NEON accesses and disables the PLD instruction
 931           in the ACTLR register. Note that setting specific bits in the ACTLR
 932           register may not be available in non-secure mode.
 933
 934 config ARM_ERRATA_460075
 935         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
 936         depends on CPU_V7
 937         help
 938           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
 939           erratum. Any asynchronous access to the L2 cache may encounter a
 940           situation in which recent store transactions to the L2 cache are lost
 941           and overwritten with stale memory contents from external memory. The
 942           workaround disables the write-allocate mode for the L2 cache via the
 943           ACTLR register. Note that setting specific bits in the ACTLR register
 944           may not be available in non-secure mode.
 945
 946 endmenu
 947
 948 source "arch/arm/common/Kconfig"
 949
 950 config FORCE_MAX_ZONEORDER
 951         int
 952         depends on SA1111
 953         default "9"
 954
 955 menu "Bus support"
 956
 957 config ARM_AMBA
 958         bool
 959
 960 config ISA
 961         bool
 962         help
 963           Find out whether you have ISA slots on your motherboard.  ISA is the
 964           name of a bus system, i.e. the way the CPU talks to the other stuff
 965           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 966           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 967           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 968
 969 # Select ISA DMA controller support
 970 config ISA_DMA
 971         bool
 972         select ISA_DMA_API
 973
 974 # Select ISA DMA interface
 975 config ISA_DMA_API
 976         bool
 977
 978 config PCI
 979         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 980         help
 981           Find out whether you have a PCI motherboard. PCI is the name of a
 982           bus system, i.e. the way the CPU talks to the other stuff inside
 983           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 984           VESA. If you have PCI, say Y, otherwise N.
 985
 986 config PCI_SYSCALL
 987         def_bool PCI
 988
 989 # Select the host bridge type
 990 config PCI_HOST_VIA82C505
 991         bool
 992         depends on PCI && ARCH_SHARK
 993         default y
 994
 995 config PCI_HOST_ITE8152
 996         bool
 997         depends on PCI && MACH_ARMCORE
 998         default y
 999         select DMABOUNCE
1000
1001 source "drivers/pci/Kconfig"
1002
1003 source "drivers/pcmcia/Kconfig"
1004
1005 endmenu
1006
1007 menu "Kernel Features"
1008
1009 source "kernel/time/Kconfig"
1010
1011 config SMP
1012         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1013         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1014                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1015         depends on GENERIC_CLOCKEVENTS
1016         select USE_GENERIC_SMP_HELPERS
1017         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1018         help
1019           This enables support for systems with more than one CPU. If you have
1020           a system with only one CPU, like most personal computers, say N. If
1021           you have a system with more than one CPU, say Y.
1022
1023           If you say N here, the kernel will run on single and multiprocessor
1024           machines, but will use only one CPU of a multiprocessor machine. If
1025           you say Y here, the kernel will run on many, but not all, single
1026           processor machines. On a single processor machine, the kernel will
1027           run faster if you say N here.
1028
1029           See also <file:Documentation/i386/IO-APIC.txt>,
1030           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1031           <http://www.linuxdoc.org/docs.html#howto>.
1032
1033           If you don't know what to do here, say N.
1034
1035 config HAVE_ARM_SCU
1036         bool
1037         depends on SMP
1038         help
1039           This option enables support for the ARM system coherency unit
1040
1041 config HAVE_ARM_TWD
1042         bool
1043         depends on SMP
1044         help
1045           This options enables support for the ARM timer and watchdog unit
1046
1047 choice
1048         prompt "Memory split"
1049         default VMSPLIT_3G
1050         help
1051           Select the desired split between kernel and user memory.
1052
1053           If you are not absolutely sure what you are doing, leave this
1054           option alone!
1055
1056         config VMSPLIT_3G
1057                 bool "3G/1G user/kernel split"
1058         config VMSPLIT_2G
1059                 bool "2G/2G user/kernel split"
1060         config VMSPLIT_1G
1061                 bool "1G/3G user/kernel split"
1062 endchoice
1063
1064 config PAGE_OFFSET
1065         hex
1066         default 0x40000000 if VMSPLIT_1G
1067         default 0x80000000 if VMSPLIT_2G
1068         default 0xC0000000
1069
1070 config NR_CPUS
1071         int "Maximum number of CPUs (2-32)"
1072         range 2 32
1073         depends on SMP
1074         default "4"
1075
1076 config HOTPLUG_CPU
1077         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1078         depends on SMP && HOTPLUG && EXPERIMENTAL
1079         help
1080           Say Y here to experiment with turning CPUs off and on.  CPUs
1081           can be controlled through /sys/devices/system/cpu.
1082
1083 config LOCAL_TIMERS
1084         bool "Use local timer interrupts"
1085         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1086                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1087         default y
1088         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1089         help
1090           Enable support for local timers on SMP platforms, rather then the
1091           legacy IPI broadcast method.  Local timers allows the system
1092           accounting to be spread across the timer interval, preventing a
1093           "thundering herd" at every timer tick.
1094
1095 source kernel/Kconfig.preempt
1096
1097 config HZ
1098         int
1099         default 128 if ARCH_L7200
1100         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440
1101         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1102         default AT91_TIMER_HZ if ARCH_AT91
1103         default 100
1104
1105 config THUMB2_KERNEL
1106         bool "Compile the kernel in Thumb-2 mode"
1107         depends on CPU_V7 && EXPERIMENTAL
1108         select AEABI
1109         select ARM_ASM_UNIFIED
1110         help
1111           By enabling this option, the kernel will be compiled in
1112           Thumb-2 mode. A compiler/assembler that understand the unified
1113           ARM-Thumb syntax is needed.
1114
1115           If unsure, say N.
1116
1117 config ARM_ASM_UNIFIED
1118         bool
1119
1120 config AEABI
1121         bool "Use the ARM EABI to compile the kernel"
1122         help
1123           This option allows for the kernel to be compiled using the latest
1124           ARM ABI (aka EABI).  This is only useful if you are using a user
1125           space environment that is also compiled with EABI.
1126
1127           Since there are major incompatibilities between the legacy ABI and
1128           EABI, especially with regard to structure member alignment, this
1129           option also changes the kernel syscall calling convention to
1130           disambiguate both ABIs and allow for backward compatibility support
1131           (selected with CONFIG_OABI_COMPAT).
1132
1133           To use this you need GCC version 4.0.0 or later.
1134
1135 config OABI_COMPAT
1136         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1137         depends on AEABI && EXPERIMENTAL
1138         default y
1139         help
1140           This option preserves the old syscall interface along with the
1141           new (ARM EABI) one. It also provides a compatibility layer to
1142           intercept syscalls that have structure arguments which layout
1143           in memory differs between the legacy ABI and the new ARM EABI
1144           (only for non "thumb" binaries). This option adds a tiny
1145           overhead to all syscalls and produces a slightly larger kernel.
1146           If you know you'll be using only pure EABI user space then you
1147           can say N here. If this option is not selected and you attempt
1148           to execute a legacy ABI binary then the result will be
1149           UNPREDICTABLE (in fact it can be predicted that it won't work
1150           at all). If in doubt say Y.
1151
1152 config ARCH_HAS_HOLES_MEMORYMODEL
1153         bool
1154
1155 # Discontigmem is deprecated
1156 config ARCH_DISCONTIGMEM_ENABLE
1157         bool
1158
1159 config ARCH_SPARSEMEM_ENABLE
1160         bool
1161
1162 config ARCH_SPARSEMEM_DEFAULT
1163         def_bool ARCH_SPARSEMEM_ENABLE
1164
1165 config ARCH_SELECT_MEMORY_MODEL
1166         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1167
1168 config NODES_SHIFT
1169         int
1170         default "4" if ARCH_LH7A40X
1171         default "2"
1172         depends on NEED_MULTIPLE_NODES
1173
1174 config HIGHMEM
1175         bool "High Memory Support (EXPERIMENTAL)"
1176         depends on MMU && EXPERIMENTAL
1177         help
1178           The address space of ARM processors is only 4 Gigabytes large
1179           and it has to accommodate user address space, kernel address
1180           space as well as some memory mapped IO. That means that, if you
1181           have a large amount of physical memory and/or IO, not all of the
1182           memory can be "permanently mapped" by the kernel. The physical
1183           memory that is not permanently mapped is called "high memory".
1184
1185           Depending on the selected kernel/user memory split, minimum
1186           vmalloc space and actual amount of RAM, you may not need this
1187           option which should result in a slightly faster kernel.
1188
1189           If unsure, say n.
1190
1191 config HIGHPTE
1192         bool "Allocate 2nd-level pagetables from highmem"
1193         depends on HIGHMEM
1194         depends on !OUTER_CACHE
1195
1196 source "mm/Kconfig"
1197
1198 config LEDS
1199         bool "Timer and CPU usage LEDs"
1200         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1201                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1202                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1203                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1204                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1205                    ARCH_AT91 || ARCH_DAVINCI || \
1206                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1207         help
1208           If you say Y here, the LEDs on your machine will be used
1209           to provide useful information about your current system status.
1210
1211           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1212           be able to select which LEDs are active using the options below. If
1213           you are compiling a kernel for the EBSA-110 or the LART however, the
1214           red LED will simply flash regularly to indicate that the system is
1215           still functional. It is safe to say Y here if you have a CATS
1216           system, but the driver will do nothing.
1217
1218 config LEDS_TIMER
1219         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1220                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1221                             || MACH_OMAP_PERSEUS2
1222         depends on LEDS
1223         depends on !GENERIC_CLOCKEVENTS
1224         default y if ARCH_EBSA110
1225         help
1226           If you say Y here, one of the system LEDs (the green one on the
1227           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1228           will flash regularly to indicate that the system is still
1229           operational. This is mainly useful to kernel hackers who are
1230           debugging unstable kernels.
1231
1232           The LART uses the same LED for both Timer LED and CPU usage LED
1233           functions. You may choose to use both, but the Timer LED function
1234           will overrule the CPU usage LED.
1235
1236 config LEDS_CPU
1237         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1238                         !ARCH_OMAP) \
1239                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1240                         || MACH_OMAP_PERSEUS2
1241         depends on LEDS
1242         help
1243           If you say Y here, the red LED will be used to give a good real
1244           time indication of CPU usage, by lighting whenever the idle task
1245           is not currently executing.
1246
1247           The LART uses the same LED for both Timer LED and CPU usage LED
1248           functions. You may choose to use both, but the Timer LED function
1249           will overrule the CPU usage LED.
1250
1251 config ALIGNMENT_TRAP
1252         bool
1253         depends on CPU_CP15_MMU
1254         default y if !ARCH_EBSA110
1255         help
1256           ARM processors cannot fetch/store information which is not
1257           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1258           address divisible by 4. On 32-bit ARM processors, these non-aligned
1259           fetch/store instructions will be emulated in software if you say
1260           here, which has a severe performance impact. This is necessary for
1261           correct operation of some network protocols. With an IP-only
1262           configuration it is safe to say N, otherwise say Y.
1263
1264 config UACCESS_WITH_MEMCPY
1265         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1266         depends on MMU && EXPERIMENTAL
1267         default y if CPU_FEROCEON
1268         help
1269           Implement faster copy_to_user and clear_user methods for CPU
1270           cores where a 8-word STM instruction give significantly higher
1271           memory write throughput than a sequence of individual 32bit stores.
1272
1273           A possible side effect is a slight increase in scheduling latency
1274           between threads sharing the same address space if they invoke
1275           such copy operations with large buffers.
1276
1277           However, if the CPU data cache is using a write-allocate mode,
1278           this option is unlikely to provide any performance gain.
1279
1280 endmenu
1281
1282 menu "Boot options"
1283
1284 # Compressed boot loader in ROM.  Yes, we really want to ask about
1285 # TEXT and BSS so we preserve their values in the config files.
1286 config ZBOOT_ROM_TEXT
1287         hex "Compressed ROM boot loader base address"
1288         default "0"
1289         help
1290           The physical address at which the ROM-able zImage is to be
1291           placed in the target.  Platforms which normally make use of
1292           ROM-able zImage formats normally set this to a suitable
1293           value in their defconfig file.
1294
1295           If ZBOOT_ROM is not enabled, this has no effect.
1296
1297 config ZBOOT_ROM_BSS
1298         hex "Compressed ROM boot loader BSS address"
1299         default "0"
1300         help
1301           The base address of an area of read/write memory in the target
1302           for the ROM-able zImage which must be available while the
1303           decompressor is running. It must be large enough to hold the
1304           entire decompressed kernel plus an additional 128 KiB.
1305           Platforms which normally make use of ROM-able zImage formats
1306           normally set this to a suitable value in their defconfig file.
1307
1308           If ZBOOT_ROM is not enabled, this has no effect.
1309
1310 config ZBOOT_ROM
1311         bool "Compressed boot loader in ROM/flash"
1312         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1313         help
1314           Say Y here if you intend to execute your compressed kernel image
1315           (zImage) directly from ROM or flash.  If unsure, say N.
1316
1317 config CMDLINE
1318         string "Default kernel command string"
1319         default ""
1320         help
1321           On some architectures (EBSA110 and CATS), there is currently no way
1322           for the boot loader to pass arguments to the kernel. For these
1323           architectures, you should supply some command-line options at build
1324           time by entering them here. As a minimum, you should specify the
1325           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1326
1327 config XIP_KERNEL
1328         bool "Kernel Execute-In-Place from ROM"
1329         depends on !ZBOOT_ROM
1330         help
1331           Execute-In-Place allows the kernel to run from non-volatile storage
1332           directly addressable by the CPU, such as NOR flash. This saves RAM
1333           space since the text section of the kernel is not loaded from flash
1334           to RAM.  Read-write sections, such as the data section and stack,
1335           are still copied to RAM.  The XIP kernel is not compressed since
1336           it has to run directly from flash, so it will take more space to
1337           store it.  The flash address used to link the kernel object files,
1338           and for storing it, is configuration dependent. Therefore, if you
1339           say Y here, you must know the proper physical address where to
1340           store the kernel image depending on your own flash memory usage.
1341
1342           Also note that the make target becomes "make xipImage" rather than
1343           "make zImage" or "make Image".  The final kernel binary to put in
1344           ROM memory will be arch/arm/boot/xipImage.
1345
1346           If unsure, say N.
1347
1348 config XIP_PHYS_ADDR
1349         hex "XIP Kernel Physical Location"
1350         depends on XIP_KERNEL
1351         default "0x00080000"
1352         help
1353           This is the physical address in your flash memory the kernel will
1354           be linked for and stored to.  This address is dependent on your
1355           own flash usage.
1356
1357 config KEXEC
1358         bool "Kexec system call (EXPERIMENTAL)"
1359         depends on EXPERIMENTAL
1360         help
1361           kexec is a system call that implements the ability to shutdown your
1362           current kernel, and to start another kernel.  It is like a reboot
1363           but it is independent of the system firmware.   And like a reboot
1364           you can start any kernel with it, not just Linux.
1365
1366           It is an ongoing process to be certain the hardware in a machine
1367           is properly shutdown, so do not be surprised if this code does not
1368           initially work for you.  It may help to enable device hotplugging
1369           support.
1370
1371 config ATAGS_PROC
1372         bool "Export atags in procfs"
1373         depends on KEXEC
1374         default y
1375         help
1376           Should the atags used to boot the kernel be exported in an "atags"
1377           file in procfs. Useful with kexec.
1378
1379 endmenu
1380
1381 menu "CPU Power Management"
1382
1383 if ARCH_HAS_CPUFREQ
1384
1385 source "drivers/cpufreq/Kconfig"
1386
1387 config CPU_FREQ_SA1100
1388         bool
1389
1390 config CPU_FREQ_SA1110
1391         bool
1392
1393 config CPU_FREQ_INTEGRATOR
1394         tristate "CPUfreq driver for ARM Integrator CPUs"
1395         depends on ARCH_INTEGRATOR && CPU_FREQ
1396         default y
1397         help
1398           This enables the CPUfreq driver for ARM Integrator CPUs.
1399
1400           For details, take a look at <file:Documentation/cpu-freq>.
1401
1402           If in doubt, say Y.
1403
1404 config CPU_FREQ_PXA
1405         bool
1406         depends on CPU_FREQ && ARCH_PXA && PXA25x
1407         default y
1408         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1409
1410 config CPU_FREQ_S3C64XX
1411         bool "CPUfreq support for Samsung S3C64XX CPUs"
1412         depends on CPU_FREQ && CPU_S3C6410
1413
1414 config CPU_FREQ_S3C
1415         bool
1416         help
1417           Internal configuration node for common cpufreq on Samsung SoC
1418
1419 config CPU_FREQ_S3C24XX
1420         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1421         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1422         select CPU_FREQ_S3C
1423         help
1424           This enables the CPUfreq driver for the Samsung S3C24XX family
1425           of CPUs.
1426
1427           For details, take a look at <file:Documentation/cpu-freq>.
1428
1429           If in doubt, say N.
1430
1431 config CPU_FREQ_S3C24XX_PLL
1432         bool "Support CPUfreq changing of PLL frequency"
1433         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1434         help
1435           Compile in support for changing the PLL frequency from the
1436           S3C24XX series CPUfreq driver. The PLL takes time to settle
1437           after a frequency change, so by default it is not enabled.
1438
1439           This also means that the PLL tables for the selected CPU(s) will
1440           be built which may increase the size of the kernel image.
1441
1442 config CPU_FREQ_S3C24XX_DEBUG
1443         bool "Debug CPUfreq Samsung driver core"
1444         depends on CPU_FREQ_S3C24XX
1445         help
1446           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1447
1448 config CPU_FREQ_S3C24XX_IODEBUG
1449         bool "Debug CPUfreq Samsung driver IO timing"
1450         depends on CPU_FREQ_S3C24XX
1451         help
1452           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1453
1454 config CPU_FREQ_S3C24XX_DEBUGFS
1455         bool "Export debugfs for CPUFreq"
1456         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1457         help
1458           Export status information via debugfs.
1459
1460 endif
1461
1462 source "drivers/cpuidle/Kconfig"
1463
1464 endmenu
1465
1466 menu "Floating point emulation"
1467
1468 comment "At least one emulation must be selected"
1469
1470 config FPE_NWFPE
1471         bool "NWFPE math emulation"
1472         depends on !AEABI || OABI_COMPAT
1473         ---help---
1474           Say Y to include the NWFPE floating point emulator in the kernel.
1475           This is necessary to run most binaries. Linux does not currently
1476           support floating point hardware so you need to say Y here even if
1477           your machine has an FPA or floating point co-processor podule.
1478
1479           You may say N here if you are going to load the Acorn FPEmulator
1480           early in the bootup.
1481
1482 config FPE_NWFPE_XP
1483         bool "Support extended precision"
1484         depends on FPE_NWFPE
1485         help
1486           Say Y to include 80-bit support in the kernel floating-point
1487           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1488           Note that gcc does not generate 80-bit operations by default,
1489           so in most cases this option only enlarges the size of the
1490           floating point emulator without any good reason.
1491
1492           You almost surely want to say N here.
1493
1494 config FPE_FASTFPE
1495         bool "FastFPE math emulation (EXPERIMENTAL)"
1496         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1497         ---help---
1498           Say Y here to include the FAST floating point emulator in the kernel.
1499           This is an experimental much faster emulator which now also has full
1500           precision for the mantissa.  It does not support any exceptions.
1501           It is very simple, and approximately 3-6 times faster than NWFPE.
1502
1503           It should be sufficient for most programs.  It may be not suitable
1504           for scientific calculations, but you have to check this for yourself.
1505           If you do not feel you need a faster FP emulation you should better
1506           choose NWFPE.
1507
1508 config VFP
1509         bool "VFP-format floating point maths"
1510         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1511         help
1512           Say Y to include VFP support code in the kernel. This is needed
1513           if your hardware includes a VFP unit.
1514
1515           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1516           release notes and additional status information.
1517
1518           Say N if your target does not have VFP hardware.
1519
1520 config VFPv3
1521         bool
1522         depends on VFP
1523         default y if CPU_V7
1524
1525 config NEON
1526         bool "Advanced SIMD (NEON) Extension support"
1527         depends on VFPv3 && CPU_V7
1528         help
1529           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1530           Extension.
1531
1532 endmenu
1533
1534 menu "Userspace binary formats"
1535
1536 source "fs/Kconfig.binfmt"
1537
1538 config ARTHUR
1539         tristate "RISC OS personality"
1540         depends on !AEABI
1541         help
1542           Say Y here to include the kernel code necessary if you want to run
1543           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1544           experimental; if this sounds frightening, say N and sleep in peace.
1545           You can also say M here to compile this support as a module (which
1546           will be called arthur).
1547
1548 endmenu
1549
1550 menu "Power management options"
1551
1552 source "kernel/power/Kconfig"
1553
1554 config ARCH_SUSPEND_POSSIBLE
1555         def_bool y
1556
1557 endmenu
1558
1559 source "net/Kconfig"
1560
1561 source "drivers/Kconfig"
1562
1563 source "fs/Kconfig"
1564
1565 source "arch/arm/Kconfig.debug"
1566
1567 source "security/Kconfig"
1568
1569 source "crypto/Kconfig"
1570
1571 source "lib/Kconfig"