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_IDE
  12         select RTC_LIB
  13         select SYS_SUPPORTS_APM_EMULATION
  14         select HAVE_OPROFILE
  15         select HAVE_KPROBES if (!XIP_KERNEL)
  16         select HAVE_KRETPROBES if (HAVE_KPROBES)
  17         select HAVE_FTRACE if (!XIP_KERNEL)
  18         select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
  19         help
  20           The ARM series is a line of low-power-consumption RISC chip designs
  21           licensed by ARM Ltd and targeted at embedded applications and
  22           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  23           manufactured, but legacy ARM-based PC hardware remains popular in
  24           Europe.  There is an ARM Linux project with a web page at
  25           <http://www.arm.linux.org.uk/>.
  26
  27 config HAVE_PWM
  28         bool
  29
  30 config SYS_SUPPORTS_APM_EMULATION
  31         bool
  32
  33 config GENERIC_GPIO
  34         bool
  35         default n
  36
  37 config GENERIC_TIME
  38         bool
  39         default n
  40
  41 config GENERIC_CLOCKEVENTS
  42         bool
  43         default n
  44
  45 config GENERIC_CLOCKEVENTS_BROADCAST
  46         bool
  47         depends on GENERIC_CLOCKEVENTS
  48         default y if SMP && !LOCAL_TIMERS
  49
  50 config MMU
  51         bool
  52         default y
  53
  54 config NO_IOPORT
  55         bool
  56         default n
  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         default n
 128
 129 config ARCH_HAS_ILOG2_U64
 130         bool
 131         default n
 132
 133 config GENERIC_HWEIGHT
 134         bool
 135         default y
 136
 137 config GENERIC_CALIBRATE_DELAY
 138         bool
 139         default y
 140
 141 config ARCH_SUPPORTS_AOUT
 142         def_bool y
 143
 144 config ARCH_MAY_HAVE_PC_FDC
 145         bool
 146
 147 config ZONE_DMA
 148         bool
 149         default y
 150
 151 config GENERIC_ISA_DMA
 152         bool
 153
 154 config FIQ
 155         bool
 156
 157 config ARCH_MTD_XIP
 158         bool
 159
 160 config GENERIC_HARDIRQS_NO__DO_IRQ
 161         bool
 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 endif
 180
 181 config VECTORS_BASE
 182         hex
 183         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 184         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 185         default 0x00000000
 186         help
 187           The base address of exception vectors.
 188
 189 source "init/Kconfig"
 190
 191 menu "System Type"
 192
 193 choice
 194         prompt "ARM system type"
 195         default ARCH_VERSATILE
 196
 197 config ARCH_AAEC2000
 198         bool "Agilent AAEC-2000 based"
 199         select ARM_AMBA
 200         help
 201           This enables support for systems based on the Agilent AAEC-2000
 202
 203 config ARCH_INTEGRATOR
 204         bool "ARM Ltd. Integrator family"
 205         select ARM_AMBA
 206         select ICST525
 207         help
 208           Support for ARM's Integrator platform.
 209
 210 config ARCH_REALVIEW
 211         bool "ARM Ltd. RealView family"
 212         select ARM_AMBA
 213         select ICST307
 214         select GENERIC_TIME
 215         select GENERIC_CLOCKEVENTS
 216         help
 217           This enables support for ARM Ltd RealView boards.
 218
 219 config ARCH_VERSATILE
 220         bool "ARM Ltd. Versatile family"
 221         select ARM_AMBA
 222         select ARM_VIC
 223         select ICST307
 224         select GENERIC_TIME
 225         select GENERIC_CLOCKEVENTS
 226         help
 227           This enables support for ARM Ltd Versatile board.
 228
 229 config ARCH_AT91
 230         bool "Atmel AT91"
 231         select GENERIC_GPIO
 232         help
 233           This enables support for systems based on the Atmel AT91RM9200,
 234           AT91SAM9 and AT91CAP9 processors.
 235
 236 config ARCH_CLPS7500
 237         bool "Cirrus CL-PS7500FE"
 238         select TIMER_ACORN
 239         select ISA
 240         select NO_IOPORT
 241         help
 242           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 243
 244 config ARCH_CLPS711X
 245         bool "Cirrus Logic CLPS711x/EP721x-based"
 246         help
 247           Support for Cirrus Logic 711x/721x based boards.
 248
 249 config ARCH_EBSA110
 250         bool "EBSA-110"
 251         select ISA
 252         select NO_IOPORT
 253         help
 254           This is an evaluation board for the StrongARM processor available
 255           from Digital. It has limited hardware on-board, including an
 256           Ethernet interface, two PCMCIA sockets, two serial ports and a
 257           parallel port.
 258
 259 config ARCH_EP93XX
 260         bool "EP93xx-based"
 261         select ARM_AMBA
 262         select ARM_VIC
 263         select GENERIC_GPIO
 264         select HAVE_GPIO_LIB
 265         help
 266           This enables support for the Cirrus EP93xx series of CPUs.
 267
 268 config ARCH_FOOTBRIDGE
 269         bool "FootBridge"
 270         select FOOTBRIDGE
 271         help
 272           Support for systems based on the DC21285 companion chip
 273           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 274
 275 config ARCH_NETX
 276         bool "Hilscher NetX based"
 277         select ARM_VIC
 278         help
 279           This enables support for systems based on the Hilscher NetX Soc
 280
 281 config ARCH_H720X
 282         bool "Hynix HMS720x-based"
 283         select ISA_DMA_API
 284         help
 285           This enables support for systems based on the Hynix HMS720x
 286
 287 config ARCH_IMX
 288         bool "IMX"
 289         select GENERIC_GPIO
 290         select GENERIC_TIME
 291         select GENERIC_CLOCKEVENTS
 292         help
 293           Support for Motorola's i.MX family of processors (MX1, MXL).
 294
 295 config ARCH_IOP13XX
 296         bool "IOP13xx-based"
 297         depends on MMU
 298         select PLAT_IOP
 299         select PCI
 300         select ARCH_SUPPORTS_MSI
 301         help
 302           Support for Intel's IOP13XX (XScale) family of processors.
 303
 304 config ARCH_IOP32X
 305         bool "IOP32x-based"
 306         depends on MMU
 307         select PLAT_IOP
 308         select PCI
 309         select GENERIC_GPIO
 310         select HAVE_GPIO_LIB
 311         help
 312           Support for Intel's 80219 and IOP32X (XScale) family of
 313           processors.
 314
 315 config ARCH_IOP33X
 316         bool "IOP33x-based"
 317         depends on MMU
 318         select PLAT_IOP
 319         select PCI
 320         select GENERIC_GPIO
 321         select HAVE_GPIO_LIB
 322         help
 323           Support for Intel's IOP33X (XScale) family of processors.
 324
 325 config ARCH_IXP23XX
 326         bool "IXP23XX-based"
 327         depends on MMU
 328         select PCI
 329         help
 330           Support for Intel's IXP23xx (XScale) family of processors.
 331
 332 config ARCH_IXP2000
 333         bool "IXP2400/2800-based"
 334         depends on MMU
 335         select PCI
 336         help
 337           Support for Intel's IXP2400/2800 (XScale) family of processors.
 338
 339 config ARCH_IXP4XX
 340         bool "IXP4xx-based"
 341         depends on MMU
 342         select GENERIC_GPIO
 343         select GENERIC_TIME
 344         select GENERIC_CLOCKEVENTS
 345         help
 346           Support for Intel's IXP4XX (XScale) family of processors.
 347
 348 config ARCH_L7200
 349         bool "LinkUp-L7200"
 350         select FIQ
 351         help
 352           Say Y here if you intend to run this kernel on a LinkUp Systems
 353           L7200 Software Development Board which uses an ARM720T processor.
 354           Information on this board can be obtained at:
 355
 356           <http://www.linkupsys.com/>
 357
 358           If you have any questions or comments about the Linux kernel port
 359           to this board, send e-mail to <sjhill@cotw.com>.
 360
 361 config ARCH_KIRKWOOD
 362         bool "Marvell Kirkwood"
 363         select PCI
 364         select GENERIC_TIME
 365         select GENERIC_CLOCKEVENTS
 366         select PLAT_ORION
 367         help
 368           Support for the following Marvell Kirkwood series SoCs:
 369           88F6180, 88F6192 and 88F6281.
 370
 371 config ARCH_KS8695
 372         bool "Micrel/Kendin KS8695"
 373         select GENERIC_GPIO
 374         help
 375           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 376           System-on-Chip devices.
 377
 378 config ARCH_NS9XXX
 379         bool "NetSilicon NS9xxx"
 380         select GENERIC_GPIO
 381         select GENERIC_TIME
 382         select GENERIC_CLOCKEVENTS
 383         help
 384           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 385           System.
 386
 387           <http://www.digi.com/products/microprocessors/index.jsp>
 388
 389 config ARCH_LOKI
 390         bool "Marvell Loki (88RC8480)"
 391         select GENERIC_TIME
 392         select GENERIC_CLOCKEVENTS
 393         select PLAT_ORION
 394         help
 395           Support for the Marvell Loki (88RC8480) SoC.
 396
 397 config ARCH_MV78XX0
 398         bool "Marvell MV78xx0"
 399         select PCI
 400         select GENERIC_TIME
 401         select GENERIC_CLOCKEVENTS
 402         select PLAT_ORION
 403         help
 404           Support for the following Marvell MV78xx0 series SoCs:
 405           MV781x0, MV782x0.
 406
 407 config ARCH_MXC
 408         bool "Freescale MXC/iMX-based"
 409         select GENERIC_TIME
 410         select GENERIC_CLOCKEVENTS
 411         select ARCH_MTD_XIP
 412         select GENERIC_GPIO
 413         select HAVE_GPIO_LIB
 414         help
 415           Support for Freescale MXC/iMX-based family of processors
 416
 417 config ARCH_ORION5X
 418         bool "Marvell Orion"
 419         depends on MMU
 420         select PCI
 421         select GENERIC_GPIO
 422         select GENERIC_TIME
 423         select GENERIC_CLOCKEVENTS
 424         select PLAT_ORION
 425         help
 426           Support for the following Marvell Orion 5x series SoCs:
 427           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 428           Orion-2 (5281).
 429
 430 config ARCH_PNX4008
 431         bool "Philips Nexperia PNX4008 Mobile"
 432         help
 433           This enables support for Philips PNX4008 mobile platform.
 434
 435 config ARCH_PXA
 436         bool "PXA2xx/PXA3xx-based"
 437         depends on MMU
 438         select ARCH_MTD_XIP
 439         select GENERIC_GPIO
 440         select HAVE_GPIO_LIB
 441         select GENERIC_TIME
 442         select GENERIC_CLOCKEVENTS
 443         select TICK_ONESHOT
 444         help
 445           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 446
 447 config ARCH_RPC
 448         bool "RiscPC"
 449         select ARCH_ACORN
 450         select FIQ
 451         select TIMER_ACORN
 452         select ARCH_MAY_HAVE_PC_FDC
 453         select HAVE_PATA_PLATFORM
 454         select ISA_DMA_API
 455         select NO_IOPORT
 456         help
 457           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 458           CD-ROM interface, serial and parallel port, and the floppy drive.
 459
 460 config ARCH_SA1100
 461         bool "SA1100-based"
 462         select ISA
 463         select ARCH_DISCONTIGMEM_ENABLE
 464         select ARCH_SPARSEMEM_ENABLE
 465         select ARCH_SELECT_MEMORY_MODEL
 466         select ARCH_MTD_XIP
 467         select GENERIC_GPIO
 468         select GENERIC_TIME
 469         select GENERIC_CLOCKEVENTS
 470         select TICK_ONESHOT
 471         select HAVE_GPIO_LIB
 472         help
 473           Support for StrongARM 11x0 based boards.
 474
 475 config ARCH_S3C2410
 476         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 477         select GENERIC_GPIO
 478         help
 479           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 480           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 481           the Samsung SMDK2410 development board (and derivatives).
 482
 483 config ARCH_SHARK
 484         bool "Shark"
 485         select ISA
 486         select ISA_DMA
 487         select PCI
 488         help
 489           Support for the StrongARM based Digital DNARD machine, also known
 490           as "Shark" (<http://www.shark-linux.de/shark.html>).
 491
 492 config ARCH_LH7A40X
 493         bool "Sharp LH7A40X"
 494         help
 495           Say Y here for systems based on one of the Sharp LH7A40X
 496           System on a Chip processors.  These CPUs include an ARM922T
 497           core with a wide array of integrated devices for
 498           hand-held and low-power applications.
 499
 500 config ARCH_DAVINCI
 501         bool "TI DaVinci"
 502         select GENERIC_TIME
 503         select GENERIC_CLOCKEVENTS
 504         select GENERIC_GPIO
 505         help
 506           Support for TI's DaVinci platform.
 507
 508 config ARCH_OMAP
 509         bool "TI OMAP"
 510         select GENERIC_GPIO
 511         select HAVE_GPIO_LIB
 512         select GENERIC_TIME
 513         select GENERIC_CLOCKEVENTS
 514         help
 515           Support for TI's OMAP platform (OMAP1 and OMAP2).
 516
 517 config ARCH_MSM7X00A
 518         bool "Qualcomm MSM7X00A"
 519         select GENERIC_TIME
 520         select GENERIC_CLOCKEVENTS
 521         help
 522           Support for Qualcomm MSM7X00A based systems.  This runs on the ARM11
 523           apps processor of the MSM7X00A and depends on a shared memory
 524           interface to the ARM9 modem processor which runs the baseband stack
 525           and controls some vital subsystems (clock and power control, etc).
 526           <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
 527
 528 endchoice
 529
 530 source "arch/arm/mach-clps711x/Kconfig"
 531
 532 source "arch/arm/mach-ep93xx/Kconfig"
 533
 534 source "arch/arm/mach-footbridge/Kconfig"
 535
 536 source "arch/arm/mach-integrator/Kconfig"
 537
 538 source "arch/arm/mach-iop32x/Kconfig"
 539
 540 source "arch/arm/mach-iop33x/Kconfig"
 541
 542 source "arch/arm/mach-iop13xx/Kconfig"
 543
 544 source "arch/arm/mach-ixp4xx/Kconfig"
 545
 546 source "arch/arm/mach-ixp2000/Kconfig"
 547
 548 source "arch/arm/mach-ixp23xx/Kconfig"
 549
 550 source "arch/arm/mach-loki/Kconfig"
 551
 552 source "arch/arm/mach-mv78xx0/Kconfig"
 553
 554 source "arch/arm/mach-pxa/Kconfig"
 555
 556 source "arch/arm/mach-sa1100/Kconfig"
 557
 558 source "arch/arm/plat-omap/Kconfig"
 559
 560 source "arch/arm/mach-omap1/Kconfig"
 561
 562 source "arch/arm/mach-omap2/Kconfig"
 563
 564 source "arch/arm/mach-orion5x/Kconfig"
 565
 566 source "arch/arm/mach-kirkwood/Kconfig"
 567
 568 source "arch/arm/plat-s3c24xx/Kconfig"
 569 source "arch/arm/plat-s3c/Kconfig"
 570
 571 if ARCH_S3C2410
 572 source "arch/arm/mach-s3c2400/Kconfig"
 573 source "arch/arm/mach-s3c2410/Kconfig"
 574 source "arch/arm/mach-s3c2412/Kconfig"
 575 source "arch/arm/mach-s3c2440/Kconfig"
 576 source "arch/arm/mach-s3c2442/Kconfig"
 577 source "arch/arm/mach-s3c2443/Kconfig"
 578 endif
 579
 580 source "arch/arm/mach-lh7a40x/Kconfig"
 581
 582 source "arch/arm/mach-imx/Kconfig"
 583
 584 source "arch/arm/mach-h720x/Kconfig"
 585
 586 source "arch/arm/mach-versatile/Kconfig"
 587
 588 source "arch/arm/mach-aaec2000/Kconfig"
 589
 590 source "arch/arm/mach-realview/Kconfig"
 591
 592 source "arch/arm/mach-at91/Kconfig"
 593
 594 source "arch/arm/plat-mxc/Kconfig"
 595
 596 source "arch/arm/mach-netx/Kconfig"
 597
 598 source "arch/arm/mach-ns9xxx/Kconfig"
 599
 600 source "arch/arm/mach-davinci/Kconfig"
 601
 602 source "arch/arm/mach-ks8695/Kconfig"
 603
 604 source "arch/arm/mach-msm/Kconfig"
 605
 606 # Definitions to make life easier
 607 config ARCH_ACORN
 608         bool
 609
 610 config PLAT_IOP
 611         bool
 612
 613 config PLAT_ORION
 614         bool
 615
 616 source arch/arm/mm/Kconfig
 617
 618 config IWMMXT
 619         bool "Enable iWMMXt support"
 620         depends on CPU_XSCALE || CPU_XSC3
 621         default y if PXA27x || PXA3xx
 622         help
 623           Enable support for iWMMXt context switching at run time if
 624           running on a CPU that supports it.
 625
 626 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 627 config XSCALE_PMU
 628         bool
 629         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 630         default y
 631
 632 if !MMU
 633 source "arch/arm/Kconfig-nommu"
 634 endif
 635
 636 endmenu
 637
 638 source "arch/arm/common/Kconfig"
 639
 640 config FORCE_MAX_ZONEORDER
 641         int
 642         depends on SA1111
 643         default "9"
 644
 645 menu "Bus support"
 646
 647 config ARM_AMBA
 648         bool
 649
 650 config ISA
 651         bool
 652         help
 653           Find out whether you have ISA slots on your motherboard.  ISA is the
 654           name of a bus system, i.e. the way the CPU talks to the other stuff
 655           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 656           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 657           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 658
 659 # Select ISA DMA controller support
 660 config ISA_DMA
 661         bool
 662         select ISA_DMA_API
 663
 664 # Select ISA DMA interface
 665 config ISA_DMA_API
 666         bool
 667
 668 config PCI
 669         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 670         help
 671           Find out whether you have a PCI motherboard. PCI is the name of a
 672           bus system, i.e. the way the CPU talks to the other stuff inside
 673           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 674           VESA. If you have PCI, say Y, otherwise N.
 675
 676 config PCI_SYSCALL
 677         def_bool PCI
 678
 679 # Select the host bridge type
 680 config PCI_HOST_VIA82C505
 681         bool
 682         depends on PCI && ARCH_SHARK
 683         default y
 684
 685 config PCI_HOST_ITE8152
 686         bool
 687         depends on PCI && MACH_ARMCORE
 688         default y
 689         select DMABOUNCE
 690
 691 source "drivers/pci/Kconfig"
 692
 693 source "drivers/pcmcia/Kconfig"
 694
 695 endmenu
 696
 697 menu "Kernel Features"
 698
 699 source "kernel/time/Kconfig"
 700
 701 config SMP
 702         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 703         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 704         select USE_GENERIC_SMP_HELPERS
 705         help
 706           This enables support for systems with more than one CPU. If you have
 707           a system with only one CPU, like most personal computers, say N. If
 708           you have a system with more than one CPU, say Y.
 709
 710           If you say N here, the kernel will run on single and multiprocessor
 711           machines, but will use only one CPU of a multiprocessor machine. If
 712           you say Y here, the kernel will run on many, but not all, single
 713           processor machines. On a single processor machine, the kernel will
 714           run faster if you say N here.
 715
 716           See also <file:Documentation/i386/IO-APIC.txt>,
 717           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 718           <http://www.linuxdoc.org/docs.html#howto>.
 719
 720           If you don't know what to do here, say N.
 721
 722 config NR_CPUS
 723         int "Maximum number of CPUs (2-32)"
 724         range 2 32
 725         depends on SMP
 726         default "4"
 727
 728 config HOTPLUG_CPU
 729         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 730         depends on SMP && HOTPLUG && EXPERIMENTAL
 731         help
 732           Say Y here to experiment with turning CPUs off and on.  CPUs
 733           can be controlled through /sys/devices/system/cpu.
 734
 735 config LOCAL_TIMERS
 736         bool "Use local timer interrupts"
 737         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 738         default y
 739         help
 740           Enable support for local timers on SMP platforms, rather then the
 741           legacy IPI broadcast method.  Local timers allows the system
 742           accounting to be spread across the timer interval, preventing a
 743           "thundering herd" at every timer tick.
 744
 745 config PREEMPT
 746         bool "Preemptible Kernel (EXPERIMENTAL)"
 747         depends on EXPERIMENTAL
 748         help
 749           This option reduces the latency of the kernel when reacting to
 750           real-time or interactive events by allowing a low priority process to
 751           be preempted even if it is in kernel mode executing a system call.
 752           This allows applications to run more reliably even when the system is
 753           under load.
 754
 755           Say Y here if you are building a kernel for a desktop, embedded
 756           or real-time system.  Say N if you are unsure.
 757
 758 config HZ
 759         int
 760         default 128 if ARCH_L7200
 761         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 762         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 763         default AT91_TIMER_HZ if ARCH_AT91
 764         default 100
 765
 766 config AEABI
 767         bool "Use the ARM EABI to compile the kernel"
 768         help
 769           This option allows for the kernel to be compiled using the latest
 770           ARM ABI (aka EABI).  This is only useful if you are using a user
 771           space environment that is also compiled with EABI.
 772
 773           Since there are major incompatibilities between the legacy ABI and
 774           EABI, especially with regard to structure member alignment, this
 775           option also changes the kernel syscall calling convention to
 776           disambiguate both ABIs and allow for backward compatibility support
 777           (selected with CONFIG_OABI_COMPAT).
 778
 779           To use this you need GCC version 4.0.0 or later.
 780
 781 config OABI_COMPAT
 782         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 783         depends on AEABI && EXPERIMENTAL
 784         default y
 785         help
 786           This option preserves the old syscall interface along with the
 787           new (ARM EABI) one. It also provides a compatibility layer to
 788           intercept syscalls that have structure arguments which layout
 789           in memory differs between the legacy ABI and the new ARM EABI
 790           (only for non "thumb" binaries). This option adds a tiny
 791           overhead to all syscalls and produces a slightly larger kernel.
 792           If you know you'll be using only pure EABI user space then you
 793           can say N here. If this option is not selected and you attempt
 794           to execute a legacy ABI binary then the result will be
 795           UNPREDICTABLE (in fact it can be predicted that it won't work
 796           at all). If in doubt say Y.
 797
 798 config ARCH_DISCONTIGMEM_ENABLE
 799         bool
 800         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 801         help
 802           Say Y to support efficient handling of discontiguous physical memory,
 803           for architectures which are either NUMA (Non-Uniform Memory Access)
 804           or have huge holes in the physical address space for other reasons.
 805           See <file:Documentation/vm/numa> for more.
 806
 807 config ARCH_SPARSEMEM_ENABLE
 808         bool
 809
 810 config ARCH_SELECT_MEMORY_MODEL
 811         bool
 812
 813 config NODES_SHIFT
 814         int
 815         default "4" if ARCH_LH7A40X
 816         default "2"
 817         depends on NEED_MULTIPLE_NODES
 818
 819 source "mm/Kconfig"
 820
 821 config LEDS
 822         bool "Timer and CPU usage LEDs"
 823         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
 824                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 825                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 826                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 827                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 828                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 829                    ARCH_KS8695 || MACH_RD88F5182
 830         help
 831           If you say Y here, the LEDs on your machine will be used
 832           to provide useful information about your current system status.
 833
 834           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 835           be able to select which LEDs are active using the options below. If
 836           you are compiling a kernel for the EBSA-110 or the LART however, the
 837           red LED will simply flash regularly to indicate that the system is
 838           still functional. It is safe to say Y here if you have a CATS
 839           system, but the driver will do nothing.
 840
 841 config LEDS_TIMER
 842         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 843                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 844                             || MACH_OMAP_PERSEUS2
 845         depends on LEDS
 846         depends on !GENERIC_CLOCKEVENTS
 847         default y if ARCH_EBSA110
 848         help
 849           If you say Y here, one of the system LEDs (the green one on the
 850           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 851           will flash regularly to indicate that the system is still
 852           operational. This is mainly useful to kernel hackers who are
 853           debugging unstable kernels.
 854
 855           The LART uses the same LED for both Timer LED and CPU usage LED
 856           functions. You may choose to use both, but the Timer LED function
 857           will overrule the CPU usage LED.
 858
 859 config LEDS_CPU
 860         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 861                         !ARCH_OMAP) \
 862                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 863                         || MACH_OMAP_PERSEUS2
 864         depends on LEDS
 865         help
 866           If you say Y here, the red LED will be used to give a good real
 867           time indication of CPU usage, by lighting whenever the idle task
 868           is not currently executing.
 869
 870           The LART uses the same LED for both Timer LED and CPU usage LED
 871           functions. You may choose to use both, but the Timer LED function
 872           will overrule the CPU usage LED.
 873
 874 config ALIGNMENT_TRAP
 875         bool
 876         depends on CPU_CP15_MMU
 877         default y if !ARCH_EBSA110
 878         help
 879           ARM processors cannot fetch/store information which is not
 880           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 881           address divisible by 4. On 32-bit ARM processors, these non-aligned
 882           fetch/store instructions will be emulated in software if you say
 883           here, which has a severe performance impact. This is necessary for
 884           correct operation of some network protocols. With an IP-only
 885           configuration it is safe to say N, otherwise say Y.
 886
 887 endmenu
 888
 889 menu "Boot options"
 890
 891 # Compressed boot loader in ROM.  Yes, we really want to ask about
 892 # TEXT and BSS so we preserve their values in the config files.
 893 config ZBOOT_ROM_TEXT
 894         hex "Compressed ROM boot loader base address"
 895         default "0"
 896         help
 897           The physical address at which the ROM-able zImage is to be
 898           placed in the target.  Platforms which normally make use of
 899           ROM-able zImage formats normally set this to a suitable
 900           value in their defconfig file.
 901
 902           If ZBOOT_ROM is not enabled, this has no effect.
 903
 904 config ZBOOT_ROM_BSS
 905         hex "Compressed ROM boot loader BSS address"
 906         default "0"
 907         help
 908           The base address of an area of read/write memory in the target
 909           for the ROM-able zImage which must be available while the
 910           decompressor is running. It must be large enough to hold the
 911           entire decompressed kernel plus an additional 128 KiB.
 912           Platforms which normally make use of ROM-able zImage formats
 913           normally set this to a suitable value in their defconfig file.
 914
 915           If ZBOOT_ROM is not enabled, this has no effect.
 916
 917 config ZBOOT_ROM
 918         bool "Compressed boot loader in ROM/flash"
 919         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 920         help
 921           Say Y here if you intend to execute your compressed kernel image
 922           (zImage) directly from ROM or flash.  If unsure, say N.
 923
 924 config CMDLINE
 925         string "Default kernel command string"
 926         default ""
 927         help
 928           On some architectures (EBSA110 and CATS), there is currently no way
 929           for the boot loader to pass arguments to the kernel. For these
 930           architectures, you should supply some command-line options at build
 931           time by entering them here. As a minimum, you should specify the
 932           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 933
 934 config XIP_KERNEL
 935         bool "Kernel Execute-In-Place from ROM"
 936         depends on !ZBOOT_ROM
 937         help
 938           Execute-In-Place allows the kernel to run from non-volatile storage
 939           directly addressable by the CPU, such as NOR flash. This saves RAM
 940           space since the text section of the kernel is not loaded from flash
 941           to RAM.  Read-write sections, such as the data section and stack,
 942           are still copied to RAM.  The XIP kernel is not compressed since
 943           it has to run directly from flash, so it will take more space to
 944           store it.  The flash address used to link the kernel object files,
 945           and for storing it, is configuration dependent. Therefore, if you
 946           say Y here, you must know the proper physical address where to
 947           store the kernel image depending on your own flash memory usage.
 948
 949           Also note that the make target becomes "make xipImage" rather than
 950           "make zImage" or "make Image".  The final kernel binary to put in
 951           ROM memory will be arch/arm/boot/xipImage.
 952
 953           If unsure, say N.
 954
 955 config XIP_PHYS_ADDR
 956         hex "XIP Kernel Physical Location"
 957         depends on XIP_KERNEL
 958         default "0x00080000"
 959         help
 960           This is the physical address in your flash memory the kernel will
 961           be linked for and stored to.  This address is dependent on your
 962           own flash usage.
 963
 964 config KEXEC
 965         bool "Kexec system call (EXPERIMENTAL)"
 966         depends on EXPERIMENTAL
 967         help
 968           kexec is a system call that implements the ability to shutdown your
 969           current kernel, and to start another kernel.  It is like a reboot
 970           but it is independent of the system firmware.   And like a reboot
 971           you can start any kernel with it, not just Linux.
 972
 973           It is an ongoing process to be certain the hardware in a machine
 974           is properly shutdown, so do not be surprised if this code does not
 975           initially work for you.  It may help to enable device hotplugging
 976           support.
 977
 978 config ATAGS_PROC
 979         bool "Export atags in procfs"
 980         depends on KEXEC
 981         default y
 982         help
 983           Should the atags used to boot the kernel be exported in an "atags"
 984           file in procfs. Useful with kexec.
 985
 986 endmenu
 987
 988 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
 989
 990 menu "CPU Frequency scaling"
 991
 992 source "drivers/cpufreq/Kconfig"
 993
 994 config CPU_FREQ_SA1100
 995         bool
 996         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 997         default y
 998
 999 config CPU_FREQ_SA1110
1000         bool
1001         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1002         default y
1003
1004 config CPU_FREQ_INTEGRATOR
1005         tristate "CPUfreq driver for ARM Integrator CPUs"
1006         depends on ARCH_INTEGRATOR && CPU_FREQ
1007         default y
1008         help
1009           This enables the CPUfreq driver for ARM Integrator CPUs.
1010
1011           For details, take a look at <file:Documentation/cpu-freq>.
1012
1013           If in doubt, say Y.
1014
1015 config CPU_FREQ_IMX
1016         tristate "CPUfreq driver for i.MX CPUs"
1017         depends on ARCH_IMX && CPU_FREQ
1018         default n
1019         help
1020           This enables the CPUfreq driver for i.MX CPUs.
1021
1022           If in doubt, say N.
1023
1024 config CPU_FREQ_PXA
1025         bool
1026         depends on CPU_FREQ && ARCH_PXA && PXA25x
1027         default y
1028         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1029
1030 endmenu
1031
1032 endif
1033
1034 menu "Floating point emulation"
1035
1036 comment "At least one emulation must be selected"
1037
1038 config FPE_NWFPE
1039         bool "NWFPE math emulation"
1040         depends on !AEABI || OABI_COMPAT
1041         ---help---
1042           Say Y to include the NWFPE floating point emulator in the kernel.
1043           This is necessary to run most binaries. Linux does not currently
1044           support floating point hardware so you need to say Y here even if
1045           your machine has an FPA or floating point co-processor podule.
1046
1047           You may say N here if you are going to load the Acorn FPEmulator
1048           early in the bootup.
1049
1050 config FPE_NWFPE_XP
1051         bool "Support extended precision"
1052         depends on FPE_NWFPE
1053         help
1054           Say Y to include 80-bit support in the kernel floating-point
1055           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1056           Note that gcc does not generate 80-bit operations by default,
1057           so in most cases this option only enlarges the size of the
1058           floating point emulator without any good reason.
1059
1060           You almost surely want to say N here.
1061
1062 config FPE_FASTFPE
1063         bool "FastFPE math emulation (EXPERIMENTAL)"
1064         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1065         ---help---
1066           Say Y here to include the FAST floating point emulator in the kernel.
1067           This is an experimental much faster emulator which now also has full
1068           precision for the mantissa.  It does not support any exceptions.
1069           It is very simple, and approximately 3-6 times faster than NWFPE.
1070
1071           It should be sufficient for most programs.  It may be not suitable
1072           for scientific calculations, but you have to check this for yourself.
1073           If you do not feel you need a faster FP emulation you should better
1074           choose NWFPE.
1075
1076 config VFP
1077         bool "VFP-format floating point maths"
1078         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1079         help
1080           Say Y to include VFP support code in the kernel. This is needed
1081           if your hardware includes a VFP unit.
1082
1083           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1084           release notes and additional status information.
1085
1086           Say N if your target does not have VFP hardware.
1087
1088 config VFPv3
1089         bool
1090         depends on VFP
1091         default y if CPU_V7
1092
1093 config NEON
1094         bool "Advanced SIMD (NEON) Extension support"
1095         depends on VFPv3 && CPU_V7
1096         help
1097           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1098           Extension.
1099
1100 endmenu
1101
1102 menu "Userspace binary formats"
1103
1104 source "fs/Kconfig.binfmt"
1105
1106 config ARTHUR
1107         tristate "RISC OS personality"
1108         depends on !AEABI
1109         help
1110           Say Y here to include the kernel code necessary if you want to run
1111           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1112           experimental; if this sounds frightening, say N and sleep in peace.
1113           You can also say M here to compile this support as a module (which
1114           will be called arthur).
1115
1116 endmenu
1117
1118 menu "Power management options"
1119
1120 source "kernel/power/Kconfig"
1121
1122 config ARCH_SUSPEND_POSSIBLE
1123         def_bool y
1124
1125 endmenu
1126
1127 source "net/Kconfig"
1128
1129 menu "Device Drivers"
1130
1131 source "drivers/base/Kconfig"
1132
1133 source "drivers/connector/Kconfig"
1134
1135 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1136 source "drivers/mtd/Kconfig"
1137 endif
1138
1139 source "drivers/parport/Kconfig"
1140
1141 source "drivers/pnp/Kconfig"
1142
1143 source "drivers/block/Kconfig"
1144
1145 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1146
1147 source "drivers/misc/Kconfig"
1148
1149 source "drivers/ide/Kconfig"
1150
1151 source "drivers/scsi/Kconfig"
1152
1153 source "drivers/ata/Kconfig"
1154
1155 source "drivers/md/Kconfig"
1156
1157 source "drivers/message/fusion/Kconfig"
1158
1159 source "drivers/ieee1394/Kconfig"
1160
1161 source "drivers/message/i2o/Kconfig"
1162
1163 source "drivers/net/Kconfig"
1164
1165 source "drivers/isdn/Kconfig"
1166
1167 # input before char - char/joystick depends on it. As does USB.
1168
1169 source "drivers/input/Kconfig"
1170
1171 source "drivers/char/Kconfig"
1172
1173 source "drivers/i2c/Kconfig"
1174
1175 source "drivers/spi/Kconfig"
1176
1177 source "drivers/gpio/Kconfig"
1178
1179 source "drivers/w1/Kconfig"
1180
1181 source "drivers/power/Kconfig"
1182
1183 source "drivers/hwmon/Kconfig"
1184
1185 source "drivers/watchdog/Kconfig"
1186
1187 source "drivers/ssb/Kconfig"
1188
1189 #source "drivers/l3/Kconfig"
1190
1191 source "drivers/mfd/Kconfig"
1192
1193 source "drivers/media/Kconfig"
1194
1195 source "drivers/video/Kconfig"
1196
1197 source "sound/Kconfig"
1198
1199 source "drivers/hid/Kconfig"
1200
1201 source "drivers/usb/Kconfig"
1202
1203 source "drivers/mmc/Kconfig"
1204
1205 source "drivers/leds/Kconfig"
1206
1207 source "drivers/rtc/Kconfig"
1208
1209 source "drivers/dma/Kconfig"
1210
1211 source "drivers/dca/Kconfig"
1212
1213 source "drivers/uio/Kconfig"
1214
1215 endmenu
1216
1217 source "fs/Kconfig"
1218
1219 source "arch/arm/Kconfig.debug"
1220
1221 source "security/Kconfig"
1222
1223 source "crypto/Kconfig"
1224
1225 source "lib/Kconfig"