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_FTRACE if (!XIP_KERNEL)
  20         select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
  21         select HAVE_GENERIC_DMA_COHERENT
  22         help
  23           The ARM series is a line of low-power-consumption RISC chip designs
  24           licensed by ARM Ltd and targeted at embedded applications and
  25           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  26           manufactured, but legacy ARM-based PC hardware remains popular in
  27           Europe.  There is an ARM Linux project with a web page at
  28           <http://www.arm.linux.org.uk/>.
  29
  30 config HAVE_PWM
  31         bool
  32
  33 config SYS_SUPPORTS_APM_EMULATION
  34         bool
  35
  36 config GENERIC_GPIO
  37         bool
  38         default n
  39
  40 config GENERIC_TIME
  41         bool
  42         default n
  43
  44 config GENERIC_CLOCKEVENTS
  45         bool
  46         default n
  47
  48 config GENERIC_CLOCKEVENTS_BROADCAST
  49         bool
  50         depends on GENERIC_CLOCKEVENTS
  51         default y if SMP && !LOCAL_TIMERS
  52
  53 config MMU
  54         bool
  55         default y
  56
  57 config NO_IOPORT
  58         bool
  59         default n
  60
  61 config EISA
  62         bool
  63         ---help---
  64           The Extended Industry Standard Architecture (EISA) bus was
  65           developed as an open alternative to the IBM MicroChannel bus.
  66
  67           The EISA bus provided some of the features of the IBM MicroChannel
  68           bus while maintaining backward compatibility with cards made for
  69           the older ISA bus.  The EISA bus saw limited use between 1988 and
  70           1995 when it was made obsolete by the PCI bus.
  71
  72           Say Y here if you are building a kernel for an EISA-based machine.
  73
  74           Otherwise, say N.
  75
  76 config SBUS
  77         bool
  78
  79 config MCA
  80         bool
  81         help
  82           MicroChannel Architecture is found in some IBM PS/2 machines and
  83           laptops.  It is a bus system similar to PCI or ISA. See
  84           <file:Documentation/mca.txt> (and especially the web page given
  85           there) before attempting to build an MCA bus kernel.
  86
  87 config GENERIC_HARDIRQS
  88         bool
  89         default y
  90
  91 config STACKTRACE_SUPPORT
  92         bool
  93         default y
  94
  95 config HAVE_LATENCYTOP_SUPPORT
  96         bool
  97         depends on !SMP
  98         default y
  99
 100 config LOCKDEP_SUPPORT
 101         bool
 102         default y
 103
 104 config TRACE_IRQFLAGS_SUPPORT
 105         bool
 106         default y
 107
 108 config HARDIRQS_SW_RESEND
 109         bool
 110         default y
 111
 112 config GENERIC_IRQ_PROBE
 113         bool
 114         default y
 115
 116 config GENERIC_LOCKBREAK
 117         bool
 118         default y
 119         depends on SMP && PREEMPT
 120
 121 config RWSEM_GENERIC_SPINLOCK
 122         bool
 123         default y
 124
 125 config RWSEM_XCHGADD_ALGORITHM
 126         bool
 127
 128 config ARCH_HAS_ILOG2_U32
 129         bool
 130         default n
 131
 132 config ARCH_HAS_ILOG2_U64
 133         bool
 134         default n
 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         bool
 161         def_bool y
 162
 163 if OPROFILE
 164
 165 config OPROFILE_ARMV6
 166         def_bool y
 167         depends on CPU_V6 && !SMP
 168         select OPROFILE_ARM11_CORE
 169
 170 config OPROFILE_MPCORE
 171         def_bool y
 172         depends on CPU_V6 && SMP
 173         select OPROFILE_ARM11_CORE
 174
 175 config OPROFILE_ARM11_CORE
 176         bool
 177
 178 config OPROFILE_ARMV7
 179         def_bool y
 180         depends on CPU_V7 && !SMP
 181         bool
 182
 183 endif
 184
 185 config VECTORS_BASE
 186         hex
 187         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 188         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 189         default 0x00000000
 190         help
 191           The base address of exception vectors.
 192
 193 source "init/Kconfig"
 194
 195 source "kernel/Kconfig.freezer"
 196
 197 menu "System Type"
 198
 199 choice
 200         prompt "ARM system type"
 201         default ARCH_VERSATILE
 202
 203 config ARCH_AAEC2000
 204         bool "Agilent AAEC-2000 based"
 205         select ARM_AMBA
 206         select HAVE_CLK
 207         help
 208           This enables support for systems based on the Agilent AAEC-2000
 209
 210 config ARCH_INTEGRATOR
 211         bool "ARM Ltd. Integrator family"
 212         select ARM_AMBA
 213         select HAVE_CLK
 214         select ICST525
 215         help
 216           Support for ARM's Integrator platform.
 217
 218 config ARCH_REALVIEW
 219         bool "ARM Ltd. RealView family"
 220         select ARM_AMBA
 221         select HAVE_CLK
 222         select ICST307
 223         select GENERIC_TIME
 224         select GENERIC_CLOCKEVENTS
 225         help
 226           This enables support for ARM Ltd RealView boards.
 227
 228 config ARCH_VERSATILE
 229         bool "ARM Ltd. Versatile family"
 230         select ARM_AMBA
 231         select ARM_VIC
 232         select HAVE_CLK
 233         select ICST307
 234         select GENERIC_TIME
 235         select GENERIC_CLOCKEVENTS
 236         help
 237           This enables support for ARM Ltd Versatile board.
 238
 239 config ARCH_AT91
 240         bool "Atmel AT91"
 241         select GENERIC_GPIO
 242         select HAVE_CLK
 243         help
 244           This enables support for systems based on the Atmel AT91RM9200,
 245           AT91SAM9 and AT91CAP9 processors.
 246
 247 config ARCH_CLPS7500
 248         bool "Cirrus CL-PS7500FE"
 249         select TIMER_ACORN
 250         select ISA
 251         select NO_IOPORT
 252         select ARCH_SPARSEMEM_ENABLE
 253         help
 254           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 255
 256 config ARCH_CLPS711X
 257         bool "Cirrus Logic CLPS711x/EP721x-based"
 258         help
 259           Support for Cirrus Logic 711x/721x based boards.
 260
 261 config ARCH_EBSA110
 262         bool "EBSA-110"
 263         select ISA
 264         select NO_IOPORT
 265         help
 266           This is an evaluation board for the StrongARM processor available
 267           from Digital. It has limited hardware on-board, including an
 268           Ethernet interface, two PCMCIA sockets, two serial ports and a
 269           parallel port.
 270
 271 config ARCH_EP93XX
 272         bool "EP93xx-based"
 273         select ARM_AMBA
 274         select ARM_VIC
 275         select GENERIC_GPIO
 276         select HAVE_CLK
 277         select ARCH_REQUIRE_GPIOLIB
 278         help
 279           This enables support for the Cirrus EP93xx series of CPUs.
 280
 281 config ARCH_FOOTBRIDGE
 282         bool "FootBridge"
 283         select FOOTBRIDGE
 284         help
 285           Support for systems based on the DC21285 companion chip
 286           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 287
 288 config ARCH_NETX
 289         bool "Hilscher NetX based"
 290         select ARM_VIC
 291         help
 292           This enables support for systems based on the Hilscher NetX Soc
 293
 294 config ARCH_H720X
 295         bool "Hynix HMS720x-based"
 296         select ISA_DMA_API
 297         help
 298           This enables support for systems based on the Hynix HMS720x
 299
 300 config ARCH_IMX
 301         bool "IMX"
 302         select GENERIC_GPIO
 303         select GENERIC_TIME
 304         select GENERIC_CLOCKEVENTS
 305         help
 306           Support for Motorola's i.MX family of processors (MX1, MXL).
 307
 308 config ARCH_IOP13XX
 309         bool "IOP13xx-based"
 310         depends on MMU
 311         select PLAT_IOP
 312         select PCI
 313         select ARCH_SUPPORTS_MSI
 314         select VMSPLIT_1G
 315         help
 316           Support for Intel's IOP13XX (XScale) family of processors.
 317
 318 config ARCH_IOP32X
 319         bool "IOP32x-based"
 320         depends on MMU
 321         select PLAT_IOP
 322         select PCI
 323         select GENERIC_GPIO
 324         select ARCH_REQUIRE_GPIOLIB
 325         help
 326           Support for Intel's 80219 and IOP32X (XScale) family of
 327           processors.
 328
 329 config ARCH_IOP33X
 330         bool "IOP33x-based"
 331         depends on MMU
 332         select PLAT_IOP
 333         select PCI
 334         select GENERIC_GPIO
 335         select ARCH_REQUIRE_GPIOLIB
 336         help
 337           Support for Intel's IOP33X (XScale) family of processors.
 338
 339 config ARCH_IXP23XX
 340         bool "IXP23XX-based"
 341         depends on MMU
 342         select PCI
 343         help
 344           Support for Intel's IXP23xx (XScale) family of processors.
 345
 346 config ARCH_IXP2000
 347         bool "IXP2400/2800-based"
 348         depends on MMU
 349         select PCI
 350         help
 351           Support for Intel's IXP2400/2800 (XScale) family of processors.
 352
 353 config ARCH_IXP4XX
 354         bool "IXP4xx-based"
 355         depends on MMU
 356         select GENERIC_GPIO
 357         select GENERIC_TIME
 358         select GENERIC_CLOCKEVENTS
 359         select ZONE_DMA if PCI
 360         help
 361           Support for Intel's IXP4XX (XScale) family of processors.
 362
 363 config ARCH_L7200
 364         bool "LinkUp-L7200"
 365         select FIQ
 366         help
 367           Say Y here if you intend to run this kernel on a LinkUp Systems
 368           L7200 Software Development Board which uses an ARM720T processor.
 369           Information on this board can be obtained at:
 370
 371           <http://www.linkupsys.com/>
 372
 373           If you have any questions or comments about the Linux kernel port
 374           to this board, send e-mail to <sjhill@cotw.com>.
 375
 376 config ARCH_KIRKWOOD
 377         bool "Marvell Kirkwood"
 378         select PCI
 379         select GENERIC_TIME
 380         select GENERIC_CLOCKEVENTS
 381         select PLAT_ORION
 382         help
 383           Support for the following Marvell Kirkwood series SoCs:
 384           88F6180, 88F6192 and 88F6281.
 385
 386 config ARCH_KS8695
 387         bool "Micrel/Kendin KS8695"
 388         select GENERIC_GPIO
 389         help
 390           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 391           System-on-Chip devices.
 392
 393 config ARCH_NS9XXX
 394         bool "NetSilicon NS9xxx"
 395         select GENERIC_GPIO
 396         select GENERIC_TIME
 397         select GENERIC_CLOCKEVENTS
 398         select HAVE_CLK
 399         help
 400           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 401           System.
 402
 403           <http://www.digi.com/products/microprocessors/index.jsp>
 404
 405 config ARCH_LOKI
 406         bool "Marvell Loki (88RC8480)"
 407         select GENERIC_TIME
 408         select GENERIC_CLOCKEVENTS
 409         select PLAT_ORION
 410         help
 411           Support for the Marvell Loki (88RC8480) SoC.
 412
 413 config ARCH_MV78XX0
 414         bool "Marvell MV78xx0"
 415         select PCI
 416         select GENERIC_TIME
 417         select GENERIC_CLOCKEVENTS
 418         select PLAT_ORION
 419         help
 420           Support for the following Marvell MV78xx0 series SoCs:
 421           MV781x0, MV782x0.
 422
 423 config ARCH_MXC
 424         bool "Freescale MXC/iMX-based"
 425         select GENERIC_TIME
 426         select GENERIC_CLOCKEVENTS
 427         select ARCH_MTD_XIP
 428         select GENERIC_GPIO
 429         select ARCH_REQUIRE_GPIOLIB
 430         help
 431           Support for Freescale MXC/iMX-based family of processors
 432
 433 config ARCH_ORION5X
 434         bool "Marvell Orion"
 435         depends on MMU
 436         select PCI
 437         select GENERIC_GPIO
 438         select GENERIC_TIME
 439         select GENERIC_CLOCKEVENTS
 440         select PLAT_ORION
 441         help
 442           Support for the following Marvell Orion 5x series SoCs:
 443           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 444           Orion-2 (5281), Orion-1-90 (6183).
 445
 446 config ARCH_PNX4008
 447         bool "Philips Nexperia PNX4008 Mobile"
 448         select HAVE_CLK
 449         help
 450           This enables support for Philips PNX4008 mobile platform.
 451
 452 config ARCH_PXA
 453         bool "PXA2xx/PXA3xx-based"
 454         depends on MMU
 455         select ARCH_MTD_XIP
 456         select GENERIC_GPIO
 457         select HAVE_CLK
 458         select ARCH_REQUIRE_GPIOLIB
 459         select GENERIC_TIME
 460         select GENERIC_CLOCKEVENTS
 461         select TICK_ONESHOT
 462         help
 463           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 464
 465 config ARCH_RPC
 466         bool "RiscPC"
 467         select ARCH_ACORN
 468         select FIQ
 469         select TIMER_ACORN
 470         select ARCH_MAY_HAVE_PC_FDC
 471         select HAVE_PATA_PLATFORM
 472         select ISA_DMA_API
 473         select NO_IOPORT
 474         select ARCH_SPARSEMEM_ENABLE
 475         help
 476           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 477           CD-ROM interface, serial and parallel port, and the floppy drive.
 478
 479 config ARCH_SA1100
 480         bool "SA1100-based"
 481         select ISA
 482         select ARCH_SPARSEMEM_ENABLE
 483         select ARCH_MTD_XIP
 484         select GENERIC_GPIO
 485         select GENERIC_TIME
 486         select GENERIC_CLOCKEVENTS
 487         select HAVE_CLK
 488         select TICK_ONESHOT
 489         select ARCH_REQUIRE_GPIOLIB
 490         help
 491           Support for StrongARM 11x0 based boards.
 492
 493 config ARCH_S3C2410
 494         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 495         select GENERIC_GPIO
 496         select HAVE_CLK
 497         help
 498           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 499           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 500           the Samsung SMDK2410 development board (and derivatives).
 501
 502 config ARCH_SHARK
 503         bool "Shark"
 504         select ISA
 505         select ISA_DMA
 506         select ZONE_DMA
 507         select PCI
 508         help
 509           Support for the StrongARM based Digital DNARD machine, also known
 510           as "Shark" (<http://www.shark-linux.de/shark.html>).
 511
 512 config ARCH_LH7A40X
 513         bool "Sharp LH7A40X"
 514         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 515         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 516         help
 517           Say Y here for systems based on one of the Sharp LH7A40X
 518           System on a Chip processors.  These CPUs include an ARM922T
 519           core with a wide array of integrated devices for
 520           hand-held and low-power applications.
 521
 522 config ARCH_DAVINCI
 523         bool "TI DaVinci"
 524         select GENERIC_TIME
 525         select GENERIC_CLOCKEVENTS
 526         select GENERIC_GPIO
 527         select ARCH_REQUIRE_GPIOLIB
 528         select HAVE_CLK
 529         select ZONE_DMA
 530         help
 531           Support for TI's DaVinci platform.
 532
 533 config ARCH_OMAP
 534         bool "TI OMAP"
 535         select GENERIC_GPIO
 536         select HAVE_CLK
 537         select ARCH_REQUIRE_GPIOLIB
 538         select GENERIC_TIME
 539         select GENERIC_CLOCKEVENTS
 540         help
 541           Support for TI's OMAP platform (OMAP1 and OMAP2).
 542
 543 config ARCH_MSM7X00A
 544         bool "Qualcomm MSM7X00A"
 545         select GENERIC_TIME
 546         select GENERIC_CLOCKEVENTS
 547         help
 548           Support for Qualcomm MSM7X00A based systems.  This runs on the ARM11
 549           apps processor of the MSM7X00A and depends on a shared memory
 550           interface to the ARM9 modem processor which runs the baseband stack
 551           and controls some vital subsystems (clock and power control, etc).
 552           <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
 553
 554 endchoice
 555
 556 source "arch/arm/mach-clps711x/Kconfig"
 557
 558 source "arch/arm/mach-ep93xx/Kconfig"
 559
 560 source "arch/arm/mach-footbridge/Kconfig"
 561
 562 source "arch/arm/mach-integrator/Kconfig"
 563
 564 source "arch/arm/mach-iop32x/Kconfig"
 565
 566 source "arch/arm/mach-iop33x/Kconfig"
 567
 568 source "arch/arm/mach-iop13xx/Kconfig"
 569
 570 source "arch/arm/mach-ixp4xx/Kconfig"
 571
 572 source "arch/arm/mach-ixp2000/Kconfig"
 573
 574 source "arch/arm/mach-ixp23xx/Kconfig"
 575
 576 source "arch/arm/mach-loki/Kconfig"
 577
 578 source "arch/arm/mach-mv78xx0/Kconfig"
 579
 580 source "arch/arm/mach-pxa/Kconfig"
 581
 582 source "arch/arm/mach-sa1100/Kconfig"
 583
 584 source "arch/arm/plat-omap/Kconfig"
 585
 586 source "arch/arm/mach-omap1/Kconfig"
 587
 588 source "arch/arm/mach-omap2/Kconfig"
 589
 590 source "arch/arm/mach-orion5x/Kconfig"
 591
 592 source "arch/arm/mach-kirkwood/Kconfig"
 593
 594 source "arch/arm/plat-s3c24xx/Kconfig"
 595 source "arch/arm/plat-s3c/Kconfig"
 596
 597 if ARCH_S3C2410
 598 source "arch/arm/mach-s3c2400/Kconfig"
 599 source "arch/arm/mach-s3c2410/Kconfig"
 600 source "arch/arm/mach-s3c2412/Kconfig"
 601 source "arch/arm/mach-s3c2440/Kconfig"
 602 source "arch/arm/mach-s3c2442/Kconfig"
 603 source "arch/arm/mach-s3c2443/Kconfig"
 604 endif
 605
 606 source "arch/arm/mach-lh7a40x/Kconfig"
 607
 608 source "arch/arm/mach-imx/Kconfig"
 609
 610 source "arch/arm/mach-h720x/Kconfig"
 611
 612 source "arch/arm/mach-versatile/Kconfig"
 613
 614 source "arch/arm/mach-aaec2000/Kconfig"
 615
 616 source "arch/arm/mach-realview/Kconfig"
 617
 618 source "arch/arm/mach-at91/Kconfig"
 619
 620 source "arch/arm/plat-mxc/Kconfig"
 621
 622 source "arch/arm/mach-netx/Kconfig"
 623
 624 source "arch/arm/mach-ns9xxx/Kconfig"
 625
 626 source "arch/arm/mach-davinci/Kconfig"
 627
 628 source "arch/arm/mach-ks8695/Kconfig"
 629
 630 source "arch/arm/mach-msm/Kconfig"
 631
 632 # Definitions to make life easier
 633 config ARCH_ACORN
 634         bool
 635
 636 config PLAT_IOP
 637         bool
 638
 639 config PLAT_ORION
 640         bool
 641
 642 source arch/arm/mm/Kconfig
 643
 644 config IWMMXT
 645         bool "Enable iWMMXt support"
 646         depends on CPU_XSCALE || CPU_XSC3
 647         default y if PXA27x || PXA3xx
 648         help
 649           Enable support for iWMMXt context switching at run time if
 650           running on a CPU that supports it.
 651
 652 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 653 config XSCALE_PMU
 654         bool
 655         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 656         default y
 657
 658 if !MMU
 659 source "arch/arm/Kconfig-nommu"
 660 endif
 661
 662 endmenu
 663
 664 source "arch/arm/common/Kconfig"
 665
 666 config FORCE_MAX_ZONEORDER
 667         int
 668         depends on SA1111
 669         default "9"
 670
 671 menu "Bus support"
 672
 673 config ARM_AMBA
 674         bool
 675
 676 config ISA
 677         bool
 678         help
 679           Find out whether you have ISA slots on your motherboard.  ISA is the
 680           name of a bus system, i.e. the way the CPU talks to the other stuff
 681           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 682           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 683           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 684
 685 # Select ISA DMA controller support
 686 config ISA_DMA
 687         bool
 688         select ISA_DMA_API
 689
 690 # Select ISA DMA interface
 691 config ISA_DMA_API
 692         bool
 693
 694 config PCI
 695         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 696         help
 697           Find out whether you have a PCI motherboard. PCI is the name of a
 698           bus system, i.e. the way the CPU talks to the other stuff inside
 699           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 700           VESA. If you have PCI, say Y, otherwise N.
 701
 702 config PCI_SYSCALL
 703         def_bool PCI
 704
 705 # Select the host bridge type
 706 config PCI_HOST_VIA82C505
 707         bool
 708         depends on PCI && ARCH_SHARK
 709         default y
 710
 711 config PCI_HOST_ITE8152
 712         bool
 713         depends on PCI && MACH_ARMCORE
 714         default y
 715         select DMABOUNCE
 716
 717 source "drivers/pci/Kconfig"
 718
 719 source "drivers/pcmcia/Kconfig"
 720
 721 endmenu
 722
 723 menu "Kernel Features"
 724
 725 source "kernel/time/Kconfig"
 726
 727 config SMP
 728         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 729         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 730         select USE_GENERIC_SMP_HELPERS
 731         help
 732           This enables support for systems with more than one CPU. If you have
 733           a system with only one CPU, like most personal computers, say N. If
 734           you have a system with more than one CPU, say Y.
 735
 736           If you say N here, the kernel will run on single and multiprocessor
 737           machines, but will use only one CPU of a multiprocessor machine. If
 738           you say Y here, the kernel will run on many, but not all, single
 739           processor machines. On a single processor machine, the kernel will
 740           run faster if you say N here.
 741
 742           See also <file:Documentation/i386/IO-APIC.txt>,
 743           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 744           <http://www.linuxdoc.org/docs.html#howto>.
 745
 746           If you don't know what to do here, say N.
 747
 748 choice
 749         prompt "Memory split"
 750         default VMSPLIT_3G
 751         help
 752           Select the desired split between kernel and user memory.
 753
 754           If you are not absolutely sure what you are doing, leave this
 755           option alone!
 756
 757         config VMSPLIT_3G
 758                 bool "3G/1G user/kernel split"
 759         config VMSPLIT_2G
 760                 bool "2G/2G user/kernel split"
 761         config VMSPLIT_1G
 762                 bool "1G/3G user/kernel split"
 763 endchoice
 764
 765 config PAGE_OFFSET
 766         hex
 767         default 0x40000000 if VMSPLIT_1G
 768         default 0x80000000 if VMSPLIT_2G
 769         default 0xC0000000
 770
 771 config NR_CPUS
 772         int "Maximum number of CPUs (2-32)"
 773         range 2 32
 774         depends on SMP
 775         default "4"
 776
 777 config HOTPLUG_CPU
 778         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 779         depends on SMP && HOTPLUG && EXPERIMENTAL
 780         help
 781           Say Y here to experiment with turning CPUs off and on.  CPUs
 782           can be controlled through /sys/devices/system/cpu.
 783
 784 config LOCAL_TIMERS
 785         bool "Use local timer interrupts"
 786         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 787         default y
 788         help
 789           Enable support for local timers on SMP platforms, rather then the
 790           legacy IPI broadcast method.  Local timers allows the system
 791           accounting to be spread across the timer interval, preventing a
 792           "thundering herd" at every timer tick.
 793
 794 config PREEMPT
 795         bool "Preemptible Kernel (EXPERIMENTAL)"
 796         depends on EXPERIMENTAL
 797         help
 798           This option reduces the latency of the kernel when reacting to
 799           real-time or interactive events by allowing a low priority process to
 800           be preempted even if it is in kernel mode executing a system call.
 801           This allows applications to run more reliably even when the system is
 802           under load.
 803
 804           Say Y here if you are building a kernel for a desktop, embedded
 805           or real-time system.  Say N if you are unsure.
 806
 807 config HZ
 808         int
 809         default 128 if ARCH_L7200
 810         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 811         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 812         default AT91_TIMER_HZ if ARCH_AT91
 813         default 100
 814
 815 config AEABI
 816         bool "Use the ARM EABI to compile the kernel"
 817         help
 818           This option allows for the kernel to be compiled using the latest
 819           ARM ABI (aka EABI).  This is only useful if you are using a user
 820           space environment that is also compiled with EABI.
 821
 822           Since there are major incompatibilities between the legacy ABI and
 823           EABI, especially with regard to structure member alignment, this
 824           option also changes the kernel syscall calling convention to
 825           disambiguate both ABIs and allow for backward compatibility support
 826           (selected with CONFIG_OABI_COMPAT).
 827
 828           To use this you need GCC version 4.0.0 or later.
 829
 830 config OABI_COMPAT
 831         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 832         depends on AEABI && EXPERIMENTAL
 833         default y
 834         help
 835           This option preserves the old syscall interface along with the
 836           new (ARM EABI) one. It also provides a compatibility layer to
 837           intercept syscalls that have structure arguments which layout
 838           in memory differs between the legacy ABI and the new ARM EABI
 839           (only for non "thumb" binaries). This option adds a tiny
 840           overhead to all syscalls and produces a slightly larger kernel.
 841           If you know you'll be using only pure EABI user space then you
 842           can say N here. If this option is not selected and you attempt
 843           to execute a legacy ABI binary then the result will be
 844           UNPREDICTABLE (in fact it can be predicted that it won't work
 845           at all). If in doubt say Y.
 846
 847 config ARCH_FLATMEM_HAS_HOLES
 848         bool
 849         default y
 850         depends on FLATMEM
 851
 852 # Discontigmem is deprecated
 853 config ARCH_DISCONTIGMEM_ENABLE
 854         bool
 855
 856 config ARCH_SPARSEMEM_ENABLE
 857         bool
 858
 859 config ARCH_SPARSEMEM_DEFAULT
 860         def_bool ARCH_SPARSEMEM_ENABLE
 861
 862 config ARCH_SELECT_MEMORY_MODEL
 863         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
 864
 865 config NODES_SHIFT
 866         int
 867         default "4" if ARCH_LH7A40X
 868         default "2"
 869         depends on NEED_MULTIPLE_NODES
 870
 871 source "mm/Kconfig"
 872
 873 config LEDS
 874         bool "Timer and CPU usage LEDs"
 875         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
 876                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 877                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 878                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 879                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 880                    ARCH_AT91 || ARCH_DAVINCI || \
 881                    ARCH_KS8695 || MACH_RD88F5182
 882         help
 883           If you say Y here, the LEDs on your machine will be used
 884           to provide useful information about your current system status.
 885
 886           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 887           be able to select which LEDs are active using the options below. If
 888           you are compiling a kernel for the EBSA-110 or the LART however, the
 889           red LED will simply flash regularly to indicate that the system is
 890           still functional. It is safe to say Y here if you have a CATS
 891           system, but the driver will do nothing.
 892
 893 config LEDS_TIMER
 894         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 895                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 896                             || MACH_OMAP_PERSEUS2
 897         depends on LEDS
 898         depends on !GENERIC_CLOCKEVENTS
 899         default y if ARCH_EBSA110
 900         help
 901           If you say Y here, one of the system LEDs (the green one on the
 902           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 903           will flash regularly to indicate that the system is still
 904           operational. This is mainly useful to kernel hackers who are
 905           debugging unstable kernels.
 906
 907           The LART uses the same LED for both Timer LED and CPU usage LED
 908           functions. You may choose to use both, but the Timer LED function
 909           will overrule the CPU usage LED.
 910
 911 config LEDS_CPU
 912         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 913                         !ARCH_OMAP) \
 914                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 915                         || MACH_OMAP_PERSEUS2
 916         depends on LEDS
 917         help
 918           If you say Y here, the red LED will be used to give a good real
 919           time indication of CPU usage, by lighting whenever the idle task
 920           is not currently executing.
 921
 922           The LART uses the same LED for both Timer LED and CPU usage LED
 923           functions. You may choose to use both, but the Timer LED function
 924           will overrule the CPU usage LED.
 925
 926 config ALIGNMENT_TRAP
 927         bool
 928         depends on CPU_CP15_MMU
 929         default y if !ARCH_EBSA110
 930         help
 931           ARM processors cannot fetch/store information which is not
 932           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 933           address divisible by 4. On 32-bit ARM processors, these non-aligned
 934           fetch/store instructions will be emulated in software if you say
 935           here, which has a severe performance impact. This is necessary for
 936           correct operation of some network protocols. With an IP-only
 937           configuration it is safe to say N, otherwise say Y.
 938
 939 endmenu
 940
 941 menu "Boot options"
 942
 943 # Compressed boot loader in ROM.  Yes, we really want to ask about
 944 # TEXT and BSS so we preserve their values in the config files.
 945 config ZBOOT_ROM_TEXT
 946         hex "Compressed ROM boot loader base address"
 947         default "0"
 948         help
 949           The physical address at which the ROM-able zImage is to be
 950           placed in the target.  Platforms which normally make use of
 951           ROM-able zImage formats normally set this to a suitable
 952           value in their defconfig file.
 953
 954           If ZBOOT_ROM is not enabled, this has no effect.
 955
 956 config ZBOOT_ROM_BSS
 957         hex "Compressed ROM boot loader BSS address"
 958         default "0"
 959         help
 960           The base address of an area of read/write memory in the target
 961           for the ROM-able zImage which must be available while the
 962           decompressor is running. It must be large enough to hold the
 963           entire decompressed kernel plus an additional 128 KiB.
 964           Platforms which normally make use of ROM-able zImage formats
 965           normally set this to a suitable value in their defconfig file.
 966
 967           If ZBOOT_ROM is not enabled, this has no effect.
 968
 969 config ZBOOT_ROM
 970         bool "Compressed boot loader in ROM/flash"
 971         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 972         help
 973           Say Y here if you intend to execute your compressed kernel image
 974           (zImage) directly from ROM or flash.  If unsure, say N.
 975
 976 config CMDLINE
 977         string "Default kernel command string"
 978         default ""
 979         help
 980           On some architectures (EBSA110 and CATS), there is currently no way
 981           for the boot loader to pass arguments to the kernel. For these
 982           architectures, you should supply some command-line options at build
 983           time by entering them here. As a minimum, you should specify the
 984           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 985
 986 config XIP_KERNEL
 987         bool "Kernel Execute-In-Place from ROM"
 988         depends on !ZBOOT_ROM
 989         help
 990           Execute-In-Place allows the kernel to run from non-volatile storage
 991           directly addressable by the CPU, such as NOR flash. This saves RAM
 992           space since the text section of the kernel is not loaded from flash
 993           to RAM.  Read-write sections, such as the data section and stack,
 994           are still copied to RAM.  The XIP kernel is not compressed since
 995           it has to run directly from flash, so it will take more space to
 996           store it.  The flash address used to link the kernel object files,
 997           and for storing it, is configuration dependent. Therefore, if you
 998           say Y here, you must know the proper physical address where to
 999           store the kernel image depending on your own flash memory usage.
1000
1001           Also note that the make target becomes "make xipImage" rather than
1002           "make zImage" or "make Image".  The final kernel binary to put in
1003           ROM memory will be arch/arm/boot/xipImage.
1004
1005           If unsure, say N.
1006
1007 config XIP_PHYS_ADDR
1008         hex "XIP Kernel Physical Location"
1009         depends on XIP_KERNEL
1010         default "0x00080000"
1011         help
1012           This is the physical address in your flash memory the kernel will
1013           be linked for and stored to.  This address is dependent on your
1014           own flash usage.
1015
1016 config KEXEC
1017         bool "Kexec system call (EXPERIMENTAL)"
1018         depends on EXPERIMENTAL
1019         help
1020           kexec is a system call that implements the ability to shutdown your
1021           current kernel, and to start another kernel.  It is like a reboot
1022           but it is independent of the system firmware.   And like a reboot
1023           you can start any kernel with it, not just Linux.
1024
1025           It is an ongoing process to be certain the hardware in a machine
1026           is properly shutdown, so do not be surprised if this code does not
1027           initially work for you.  It may help to enable device hotplugging
1028           support.
1029
1030 config ATAGS_PROC
1031         bool "Export atags in procfs"
1032         depends on KEXEC
1033         default y
1034         help
1035           Should the atags used to boot the kernel be exported in an "atags"
1036           file in procfs. Useful with kexec.
1037
1038 endmenu
1039
1040 menu "CPU Power Management"
1041
1042 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1043
1044 source "drivers/cpufreq/Kconfig"
1045
1046 config CPU_FREQ_SA1100
1047         bool
1048         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1049         default y
1050
1051 config CPU_FREQ_SA1110
1052         bool
1053         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1054         default y
1055
1056 config CPU_FREQ_INTEGRATOR
1057         tristate "CPUfreq driver for ARM Integrator CPUs"
1058         depends on ARCH_INTEGRATOR && CPU_FREQ
1059         default y
1060         help
1061           This enables the CPUfreq driver for ARM Integrator CPUs.
1062
1063           For details, take a look at <file:Documentation/cpu-freq>.
1064
1065           If in doubt, say Y.
1066
1067 config CPU_FREQ_IMX
1068         tristate "CPUfreq driver for i.MX CPUs"
1069         depends on ARCH_IMX && CPU_FREQ
1070         default n
1071         help
1072           This enables the CPUfreq driver for i.MX CPUs.
1073
1074           If in doubt, say N.
1075
1076 config CPU_FREQ_PXA
1077         bool
1078         depends on CPU_FREQ && ARCH_PXA && PXA25x
1079         default y
1080         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1081
1082 endif
1083
1084 source "drivers/cpuidle/Kconfig"
1085
1086 endmenu
1087
1088 menu "Floating point emulation"
1089
1090 comment "At least one emulation must be selected"
1091
1092 config FPE_NWFPE
1093         bool "NWFPE math emulation"
1094         depends on !AEABI || OABI_COMPAT
1095         ---help---
1096           Say Y to include the NWFPE floating point emulator in the kernel.
1097           This is necessary to run most binaries. Linux does not currently
1098           support floating point hardware so you need to say Y here even if
1099           your machine has an FPA or floating point co-processor podule.
1100
1101           You may say N here if you are going to load the Acorn FPEmulator
1102           early in the bootup.
1103
1104 config FPE_NWFPE_XP
1105         bool "Support extended precision"
1106         depends on FPE_NWFPE
1107         help
1108           Say Y to include 80-bit support in the kernel floating-point
1109           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1110           Note that gcc does not generate 80-bit operations by default,
1111           so in most cases this option only enlarges the size of the
1112           floating point emulator without any good reason.
1113
1114           You almost surely want to say N here.
1115
1116 config FPE_FASTFPE
1117         bool "FastFPE math emulation (EXPERIMENTAL)"
1118         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1119         ---help---
1120           Say Y here to include the FAST floating point emulator in the kernel.
1121           This is an experimental much faster emulator which now also has full
1122           precision for the mantissa.  It does not support any exceptions.
1123           It is very simple, and approximately 3-6 times faster than NWFPE.
1124
1125           It should be sufficient for most programs.  It may be not suitable
1126           for scientific calculations, but you have to check this for yourself.
1127           If you do not feel you need a faster FP emulation you should better
1128           choose NWFPE.
1129
1130 config VFP
1131         bool "VFP-format floating point maths"
1132         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1133         help
1134           Say Y to include VFP support code in the kernel. This is needed
1135           if your hardware includes a VFP unit.
1136
1137           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1138           release notes and additional status information.
1139
1140           Say N if your target does not have VFP hardware.
1141
1142 config VFPv3
1143         bool
1144         depends on VFP
1145         default y if CPU_V7
1146
1147 config NEON
1148         bool "Advanced SIMD (NEON) Extension support"
1149         depends on VFPv3 && CPU_V7
1150         help
1151           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1152           Extension.
1153
1154 endmenu
1155
1156 menu "Userspace binary formats"
1157
1158 source "fs/Kconfig.binfmt"
1159
1160 config ARTHUR
1161         tristate "RISC OS personality"
1162         depends on !AEABI
1163         help
1164           Say Y here to include the kernel code necessary if you want to run
1165           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1166           experimental; if this sounds frightening, say N and sleep in peace.
1167           You can also say M here to compile this support as a module (which
1168           will be called arthur).
1169
1170 endmenu
1171
1172 menu "Power management options"
1173
1174 source "kernel/power/Kconfig"
1175
1176 config ARCH_SUSPEND_POSSIBLE
1177         def_bool y
1178
1179 endmenu
1180
1181 source "net/Kconfig"
1182
1183 menu "Device Drivers"
1184
1185 source "drivers/base/Kconfig"
1186
1187 source "drivers/connector/Kconfig"
1188
1189 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1190 source "drivers/mtd/Kconfig"
1191 endif
1192
1193 source "drivers/parport/Kconfig"
1194
1195 source "drivers/pnp/Kconfig"
1196
1197 source "drivers/block/Kconfig"
1198
1199 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1200
1201 source "drivers/misc/Kconfig"
1202
1203 source "drivers/ide/Kconfig"
1204
1205 source "drivers/scsi/Kconfig"
1206
1207 source "drivers/ata/Kconfig"
1208
1209 source "drivers/md/Kconfig"
1210
1211 source "drivers/message/fusion/Kconfig"
1212
1213 source "drivers/ieee1394/Kconfig"
1214
1215 source "drivers/message/i2o/Kconfig"
1216
1217 source "drivers/net/Kconfig"
1218
1219 source "drivers/isdn/Kconfig"
1220
1221 # input before char - char/joystick depends on it. As does USB.
1222
1223 source "drivers/input/Kconfig"
1224
1225 source "drivers/char/Kconfig"
1226
1227 source "drivers/i2c/Kconfig"
1228
1229 source "drivers/spi/Kconfig"
1230
1231 source "drivers/gpio/Kconfig"
1232
1233 source "drivers/w1/Kconfig"
1234
1235 source "drivers/power/Kconfig"
1236
1237 source "drivers/hwmon/Kconfig"
1238
1239 source "drivers/thermal/Kconfig"
1240
1241 source "drivers/watchdog/Kconfig"
1242
1243 source "drivers/ssb/Kconfig"
1244
1245 #source "drivers/l3/Kconfig"
1246
1247 source "drivers/mfd/Kconfig"
1248
1249 source "drivers/media/Kconfig"
1250
1251 source "drivers/video/Kconfig"
1252
1253 source "sound/Kconfig"
1254
1255 source "drivers/hid/Kconfig"
1256
1257 source "drivers/usb/Kconfig"
1258
1259 source "drivers/mmc/Kconfig"
1260
1261 source "drivers/memstick/Kconfig"
1262
1263 source "drivers/accessibility/Kconfig"
1264
1265 source "drivers/leds/Kconfig"
1266
1267 source "drivers/rtc/Kconfig"
1268
1269 source "drivers/dma/Kconfig"
1270
1271 source "drivers/dca/Kconfig"
1272
1273 source "drivers/auxdisplay/Kconfig"
1274
1275 source "drivers/regulator/Kconfig"
1276
1277 source "drivers/uio/Kconfig"
1278
1279 endmenu
1280
1281 source "fs/Kconfig"
1282
1283 source "arch/arm/Kconfig.debug"
1284
1285 source "security/Kconfig"
1286
1287 source "crypto/Kconfig"
1288
1289 source "lib/Kconfig"