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 RTC_LIB
  12         select SYS_SUPPORTS_APM_EMULATION
  13         help
  14           The ARM series is a line of low-power-consumption RISC chip designs
  15           licensed by ARM Ltd and targeted at embedded applications and
  16           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  17           manufactured, but legacy ARM-based PC hardware remains popular in
  18           Europe.  There is an ARM Linux project with a web page at
  19           <http://www.arm.linux.org.uk/>.
  20
  21 config SYS_SUPPORTS_APM_EMULATION
  22         bool
  23
  24 config GENERIC_GPIO
  25         bool
  26         default n
  27
  28 config GENERIC_TIME
  29         bool
  30         default n
  31
  32 config GENERIC_CLOCKEVENTS
  33         bool
  34         default n
  35
  36 config MMU
  37         bool
  38         default y
  39
  40 config NO_IOPORT
  41         bool
  42         default n
  43
  44 config EISA
  45         bool
  46         ---help---
  47           The Extended Industry Standard Architecture (EISA) bus was
  48           developed as an open alternative to the IBM MicroChannel bus.
  49
  50           The EISA bus provided some of the features of the IBM MicroChannel
  51           bus while maintaining backward compatibility with cards made for
  52           the older ISA bus.  The EISA bus saw limited use between 1988 and
  53           1995 when it was made obsolete by the PCI bus.
  54
  55           Say Y here if you are building a kernel for an EISA-based machine.
  56
  57           Otherwise, say N.
  58
  59 config SBUS
  60         bool
  61
  62 config MCA
  63         bool
  64         help
  65           MicroChannel Architecture is found in some IBM PS/2 machines and
  66           laptops.  It is a bus system similar to PCI or ISA. See
  67           <file:Documentation/mca.txt> (and especially the web page given
  68           there) before attempting to build an MCA bus kernel.
  69
  70 config GENERIC_HARDIRQS
  71         bool
  72         default y
  73
  74 config STACKTRACE_SUPPORT
  75         bool
  76         default y
  77
  78 config LOCKDEP_SUPPORT
  79         bool
  80         default y
  81
  82 config TRACE_IRQFLAGS_SUPPORT
  83         bool
  84         default y
  85
  86 config HARDIRQS_SW_RESEND
  87         bool
  88         default y
  89
  90 config GENERIC_IRQ_PROBE
  91         bool
  92         default y
  93
  94 config GENERIC_LOCKBREAK
  95         bool
  96         default y
  97         depends on SMP && PREEMPT
  98
  99 config RWSEM_GENERIC_SPINLOCK
 100         bool
 101         default y
 102
 103 config RWSEM_XCHGADD_ALGORITHM
 104         bool
 105
 106 config ARCH_HAS_ILOG2_U32
 107         bool
 108         default n
 109
 110 config ARCH_HAS_ILOG2_U64
 111         bool
 112         default n
 113
 114 config GENERIC_HWEIGHT
 115         bool
 116         default y
 117
 118 config GENERIC_CALIBRATE_DELAY
 119         bool
 120         default y
 121
 122 config ARCH_MAY_HAVE_PC_FDC
 123         bool
 124
 125 config ZONE_DMA
 126         bool
 127         default y
 128
 129 config GENERIC_ISA_DMA
 130         bool
 131
 132 config FIQ
 133         bool
 134
 135 config ARCH_MTD_XIP
 136         bool
 137
 138 if OPROFILE
 139
 140 config OPROFILE_ARMV6
 141         def_bool y
 142         depends on CPU_V6 && !SMP
 143         select OPROFILE_ARM11_CORE
 144
 145 config OPROFILE_MPCORE
 146         def_bool y
 147         depends on CPU_V6 && SMP
 148         select OPROFILE_ARM11_CORE
 149
 150 config OPROFILE_ARM11_CORE
 151         bool
 152
 153 endif
 154
 155 config VECTORS_BASE
 156         hex
 157         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 158         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 159         default 0x00000000
 160         help
 161           The base address of exception vectors.
 162
 163 source "init/Kconfig"
 164
 165 menu "System Type"
 166
 167 choice
 168         prompt "ARM system type"
 169         default ARCH_VERSATILE
 170
 171 config ARCH_AAEC2000
 172         bool "Agilent AAEC-2000 based"
 173         select ARM_AMBA
 174         help
 175           This enables support for systems based on the Agilent AAEC-2000
 176
 177 config ARCH_INTEGRATOR
 178         bool "ARM Ltd. Integrator family"
 179         select ARM_AMBA
 180         select ICST525
 181         help
 182           Support for ARM's Integrator platform.
 183
 184 config ARCH_REALVIEW
 185         bool "ARM Ltd. RealView family"
 186         select ARM_AMBA
 187         select ICST307
 188         help
 189           This enables support for ARM Ltd RealView boards.
 190
 191 config ARCH_VERSATILE
 192         bool "ARM Ltd. Versatile family"
 193         select ARM_AMBA
 194         select ARM_VIC
 195         select ICST307
 196         select GENERIC_TIME
 197         select GENERIC_CLOCKEVENTS
 198         help
 199           This enables support for ARM Ltd Versatile board.
 200
 201 config ARCH_AT91
 202         bool "Atmel AT91"
 203         select GENERIC_GPIO
 204         help
 205           This enables support for systems based on the Atmel AT91RM9200,
 206           AT91SAM9 and AT91CAP9 processors.
 207
 208 config ARCH_CLPS7500
 209         bool "Cirrus CL-PS7500FE"
 210         select TIMER_ACORN
 211         select ISA
 212         select NO_IOPORT
 213         help
 214           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 215
 216 config ARCH_CLPS711X
 217         bool "Cirrus Logic CLPS711x/EP721x-based"
 218         help
 219           Support for Cirrus Logic 711x/721x based boards.
 220
 221 config ARCH_CO285
 222         bool "Co-EBSA285"
 223         select FOOTBRIDGE
 224         select FOOTBRIDGE_ADDIN
 225         help
 226           Support for Intel's EBSA285 companion chip.
 227
 228 config ARCH_EBSA110
 229         bool "EBSA-110"
 230         select ISA
 231         select NO_IOPORT
 232         help
 233           This is an evaluation board for the StrongARM processor available
 234           from Digital. It has limited hardware on-board, including an
 235           Ethernet interface, two PCMCIA sockets, two serial ports and a
 236           parallel port.
 237
 238 config ARCH_EP93XX
 239         bool "EP93xx-based"
 240         select ARM_AMBA
 241         select ARM_VIC
 242         select GENERIC_GPIO
 243         help
 244           This enables support for the Cirrus EP93xx series of CPUs.
 245
 246 config ARCH_FOOTBRIDGE
 247         bool "FootBridge"
 248         select FOOTBRIDGE
 249         help
 250           Support for systems based on the DC21285 companion chip
 251           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 252
 253 config ARCH_NETX
 254         bool "Hilscher NetX based"
 255         select ARM_VIC
 256         help
 257           This enables support for systems based on the Hilscher NetX Soc
 258
 259 config ARCH_H720X
 260         bool "Hynix HMS720x-based"
 261         select ISA_DMA_API
 262         help
 263           This enables support for systems based on the Hynix HMS720x
 264
 265 config ARCH_IMX
 266         bool "IMX"
 267         select GENERIC_GPIO
 268         select GENERIC_TIME
 269         select GENERIC_CLOCKEVENTS
 270         help
 271           Support for Motorola's i.MX family of processors (MX1, MXL).
 272
 273 config ARCH_IOP13XX
 274         bool "IOP13xx-based"
 275         depends on MMU
 276         select PLAT_IOP
 277         select PCI
 278         select ARCH_SUPPORTS_MSI
 279         help
 280           Support for Intel's IOP13XX (XScale) family of processors.
 281
 282 config ARCH_IOP32X
 283         bool "IOP32x-based"
 284         depends on MMU
 285         select PLAT_IOP
 286         select PCI
 287         help
 288           Support for Intel's 80219 and IOP32X (XScale) family of
 289           processors.
 290
 291 config ARCH_IOP33X
 292         bool "IOP33x-based"
 293         depends on MMU
 294         select PLAT_IOP
 295         select PCI
 296         help
 297           Support for Intel's IOP33X (XScale) family of processors.
 298
 299 config ARCH_IXP23XX
 300         bool "IXP23XX-based"
 301         depends on MMU
 302         select PCI
 303         help
 304           Support for Intel's IXP23xx (XScale) family of processors.
 305
 306 config ARCH_IXP2000
 307         bool "IXP2400/2800-based"
 308         depends on MMU
 309         select PCI
 310         help
 311           Support for Intel's IXP2400/2800 (XScale) family of processors.
 312
 313 config ARCH_IXP4XX
 314         bool "IXP4xx-based"
 315         depends on MMU
 316         select GENERIC_GPIO
 317         select GENERIC_TIME
 318         select GENERIC_CLOCKEVENTS
 319         help
 320           Support for Intel's IXP4XX (XScale) family of processors.
 321
 322 config ARCH_L7200
 323         bool "LinkUp-L7200"
 324         select FIQ
 325         help
 326           Say Y here if you intend to run this kernel on a LinkUp Systems
 327           L7200 Software Development Board which uses an ARM720T processor.
 328           Information on this board can be obtained at:
 329
 330           <http://www.linkupsys.com/>
 331
 332           If you have any questions or comments about the Linux kernel port
 333           to this board, send e-mail to <sjhill@cotw.com>.
 334
 335 config ARCH_KS8695
 336         bool "Micrel/Kendin KS8695"
 337         select GENERIC_GPIO
 338         help
 339           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 340           System-on-Chip devices.
 341
 342 config ARCH_NS9XXX
 343         bool "NetSilicon NS9xxx"
 344         select GENERIC_GPIO
 345         select GENERIC_TIME
 346         select GENERIC_CLOCKEVENTS
 347         help
 348           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 349           System.
 350
 351           <http://www.digi.com/products/microprocessors/index.jsp>
 352
 353 config ARCH_MXC
 354         bool "Freescale MXC/iMX-based"
 355         select ARCH_MTD_XIP
 356         help
 357           Support for Freescale MXC/iMX-based family of processors
 358
 359 config ARCH_ORION
 360         bool "Marvell Orion"
 361         depends on MMU
 362         select PCI
 363         select GENERIC_GPIO
 364         select GENERIC_TIME
 365         select GENERIC_CLOCKEVENTS
 366         help
 367           Support for Marvell Orion System on Chip family.
 368
 369 config ARCH_PNX4008
 370         bool "Philips Nexperia PNX4008 Mobile"
 371         help
 372           This enables support for Philips PNX4008 mobile platform.
 373
 374 config ARCH_PXA
 375         bool "PXA2xx/PXA3xx-based"
 376         depends on MMU
 377         select ARCH_MTD_XIP
 378         select GENERIC_GPIO
 379         select GENERIC_TIME
 380         select GENERIC_CLOCKEVENTS
 381         select TICK_ONESHOT
 382         help
 383           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 384
 385 config ARCH_RPC
 386         bool "RiscPC"
 387         select ARCH_ACORN
 388         select FIQ
 389         select TIMER_ACORN
 390         select ARCH_MAY_HAVE_PC_FDC
 391         select ISA_DMA_API
 392         select NO_IOPORT
 393         help
 394           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 395           CD-ROM interface, serial and parallel port, and the floppy drive.
 396
 397 config ARCH_SA1100
 398         bool "SA1100-based"
 399         select ISA
 400         select ARCH_DISCONTIGMEM_ENABLE
 401         select ARCH_MTD_XIP
 402         select GENERIC_GPIO
 403         select GENERIC_TIME
 404         help
 405           Support for StrongARM 11x0 based boards.
 406
 407 config ARCH_S3C2410
 408         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 409         select GENERIC_GPIO
 410         help
 411           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 412           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 413           the Samsung SMDK2410 development board (and derivatives).
 414
 415 config ARCH_SHARK
 416         bool "Shark"
 417         select ISA
 418         select ISA_DMA
 419         select PCI
 420         help
 421           Support for the StrongARM based Digital DNARD machine, also known
 422           as "Shark" (<http://www.shark-linux.de/shark.html>).
 423
 424 config ARCH_LH7A40X
 425         bool "Sharp LH7A40X"
 426         help
 427           Say Y here for systems based on one of the Sharp LH7A40X
 428           System on a Chip processors.  These CPUs include an ARM922T
 429           core with a wide array of integrated devices for
 430           hand-held and low-power applications.
 431
 432 config ARCH_DAVINCI
 433         bool "TI DaVinci"
 434         select GENERIC_TIME
 435         select GENERIC_CLOCKEVENTS
 436         select GENERIC_GPIO
 437         help
 438           Support for TI's DaVinci platform.
 439
 440 config ARCH_OMAP
 441         bool "TI OMAP"
 442         select GENERIC_GPIO
 443         select GENERIC_TIME
 444         help
 445           Support for TI's OMAP platform (OMAP1 and OMAP2).
 446
 447 config ARCH_MSM7X00A
 448         bool "Qualcomm MSM7X00A"
 449         select GENERIC_TIME
 450         select GENERIC_CLOCKEVENTS
 451         help
 452           Support for Qualcomm MSM7X00A based systems.  This runs on the ARM11
 453           apps processor of the MSM7X00A and depends on a shared memory
 454           interface to the ARM9 modem processor which runs the baseband stack
 455           and controls some vital subsystems (clock and power control, etc).
 456           <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
 457
 458 endchoice
 459
 460 source "arch/arm/mach-clps711x/Kconfig"
 461
 462 source "arch/arm/mach-ep93xx/Kconfig"
 463
 464 source "arch/arm/mach-footbridge/Kconfig"
 465
 466 source "arch/arm/mach-integrator/Kconfig"
 467
 468 source "arch/arm/mach-iop32x/Kconfig"
 469
 470 source "arch/arm/mach-iop33x/Kconfig"
 471
 472 source "arch/arm/mach-iop13xx/Kconfig"
 473
 474 source "arch/arm/mach-ixp4xx/Kconfig"
 475
 476 source "arch/arm/mach-ixp2000/Kconfig"
 477
 478 source "arch/arm/mach-ixp23xx/Kconfig"
 479
 480 source "arch/arm/mach-pxa/Kconfig"
 481
 482 source "arch/arm/mach-sa1100/Kconfig"
 483
 484 source "arch/arm/plat-omap/Kconfig"
 485
 486 source "arch/arm/mach-omap1/Kconfig"
 487
 488 source "arch/arm/mach-omap2/Kconfig"
 489
 490 source "arch/arm/mach-orion/Kconfig"
 491
 492 source "arch/arm/plat-s3c24xx/Kconfig"
 493 source "arch/arm/plat-s3c/Kconfig"
 494
 495 if ARCH_S3C2410
 496 source "arch/arm/mach-s3c2400/Kconfig"
 497 source "arch/arm/mach-s3c2410/Kconfig"
 498 source "arch/arm/mach-s3c2412/Kconfig"
 499 source "arch/arm/mach-s3c2440/Kconfig"
 500 source "arch/arm/mach-s3c2442/Kconfig"
 501 source "arch/arm/mach-s3c2443/Kconfig"
 502 endif
 503
 504 source "arch/arm/mach-lh7a40x/Kconfig"
 505
 506 source "arch/arm/mach-imx/Kconfig"
 507
 508 source "arch/arm/mach-h720x/Kconfig"
 509
 510 source "arch/arm/mach-versatile/Kconfig"
 511
 512 source "arch/arm/mach-aaec2000/Kconfig"
 513
 514 source "arch/arm/mach-realview/Kconfig"
 515
 516 source "arch/arm/mach-at91/Kconfig"
 517
 518 source "arch/arm/plat-mxc/Kconfig"
 519
 520 source "arch/arm/mach-netx/Kconfig"
 521
 522 source "arch/arm/mach-ns9xxx/Kconfig"
 523
 524 source "arch/arm/mach-davinci/Kconfig"
 525
 526 source "arch/arm/mach-ks8695/Kconfig"
 527
 528 source "arch/arm/mach-msm/Kconfig"
 529
 530 # Definitions to make life easier
 531 config ARCH_ACORN
 532         bool
 533
 534 config PLAT_IOP
 535         bool
 536
 537 source arch/arm/mm/Kconfig
 538
 539 config IWMMXT
 540         bool "Enable iWMMXt support"
 541         depends on CPU_XSCALE || CPU_XSC3
 542         default y if PXA27x || PXA3xx
 543         help
 544           Enable support for iWMMXt context switching at run time if
 545           running on a CPU that supports it.
 546
 547 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 548 config XSCALE_PMU
 549         bool
 550         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 551         default y
 552
 553 if !MMU
 554 source "arch/arm/Kconfig-nommu"
 555 endif
 556
 557 endmenu
 558
 559 source "arch/arm/common/Kconfig"
 560
 561 config FORCE_MAX_ZONEORDER
 562         int
 563         depends on SA1111
 564         default "9"
 565
 566 menu "Bus support"
 567
 568 config ARM_AMBA
 569         bool
 570
 571 config ISA
 572         bool
 573         help
 574           Find out whether you have ISA slots on your motherboard.  ISA is the
 575           name of a bus system, i.e. the way the CPU talks to the other stuff
 576           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 577           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 578           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 579
 580 # Select ISA DMA controller support
 581 config ISA_DMA
 582         bool
 583         select ISA_DMA_API
 584
 585 # Select ISA DMA interface
 586 config ISA_DMA_API
 587         bool
 588
 589 config PCI
 590         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 591         help
 592           Find out whether you have a PCI motherboard. PCI is the name of a
 593           bus system, i.e. the way the CPU talks to the other stuff inside
 594           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 595           VESA. If you have PCI, say Y, otherwise N.
 596
 597 config PCI_SYSCALL
 598         def_bool PCI
 599
 600 # Select the host bridge type
 601 config PCI_HOST_VIA82C505
 602         bool
 603         depends on PCI && ARCH_SHARK
 604         default y
 605
 606 config PCI_HOST_ITE8152
 607         bool
 608         depends on PCI && MACH_ARMCORE
 609         default y
 610         select DMABOUNCE
 611
 612 source "drivers/pci/Kconfig"
 613
 614 source "drivers/pcmcia/Kconfig"
 615
 616 endmenu
 617
 618 menu "Kernel Features"
 619
 620 source "kernel/time/Kconfig"
 621
 622 config SMP
 623         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 624         depends on EXPERIMENTAL && REALVIEW_MPCORE
 625         help
 626           This enables support for systems with more than one CPU. If you have
 627           a system with only one CPU, like most personal computers, say N. If
 628           you have a system with more than one CPU, say Y.
 629
 630           If you say N here, the kernel will run on single and multiprocessor
 631           machines, but will use only one CPU of a multiprocessor machine. If
 632           you say Y here, the kernel will run on many, but not all, single
 633           processor machines. On a single processor machine, the kernel will
 634           run faster if you say N here.
 635
 636           See also the <file:Documentation/smp.txt>,
 637           <file:Documentation/i386/IO-APIC.txt>,
 638           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 639           <http://www.linuxdoc.org/docs.html#howto>.
 640
 641           If you don't know what to do here, say N.
 642
 643 config NR_CPUS
 644         int "Maximum number of CPUs (2-32)"
 645         range 2 32
 646         depends on SMP
 647         default "4"
 648
 649 config HOTPLUG_CPU
 650         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 651         depends on SMP && HOTPLUG && EXPERIMENTAL
 652         help
 653           Say Y here to experiment with turning CPUs off and on.  CPUs
 654           can be controlled through /sys/devices/system/cpu.
 655
 656 config LOCAL_TIMERS
 657         bool "Use local timer interrupts"
 658         depends on SMP && REALVIEW_MPCORE
 659         default y
 660         help
 661           Enable support for local timers on SMP platforms, rather then the
 662           legacy IPI broadcast method.  Local timers allows the system
 663           accounting to be spread across the timer interval, preventing a
 664           "thundering herd" at every timer tick.
 665
 666 config PREEMPT
 667         bool "Preemptible Kernel (EXPERIMENTAL)"
 668         depends on EXPERIMENTAL
 669         help
 670           This option reduces the latency of the kernel when reacting to
 671           real-time or interactive events by allowing a low priority process to
 672           be preempted even if it is in kernel mode executing a system call.
 673           This allows applications to run more reliably even when the system is
 674           under load.
 675
 676           Say Y here if you are building a kernel for a desktop, embedded
 677           or real-time system.  Say N if you are unsure.
 678
 679 config NO_IDLE_HZ
 680         bool "Dynamic tick timer"
 681         depends on !GENERIC_CLOCKEVENTS
 682         help
 683           Select this option if you want to disable continuous timer ticks
 684           and have them programmed to occur as required. This option saves
 685           power as the system can remain in idle state for longer.
 686
 687           By default dynamic tick is disabled during the boot, and can be
 688           manually enabled with:
 689
 690             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 691
 692           Alternatively, if you want dynamic tick automatically enabled
 693           during boot, pass "dyntick=enable" via the kernel command string.
 694
 695           Please note that dynamic tick may affect the accuracy of
 696           timekeeping on some platforms depending on the implementation.
 697           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 698           to have accurate timekeeping with dynamic tick.
 699
 700 config HZ
 701         int
 702         default 128 if ARCH_L7200
 703         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 704         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 705         default AT91_TIMER_HZ if ARCH_AT91
 706         default 100
 707
 708 config AEABI
 709         bool "Use the ARM EABI to compile the kernel"
 710         help
 711           This option allows for the kernel to be compiled using the latest
 712           ARM ABI (aka EABI).  This is only useful if you are using a user
 713           space environment that is also compiled with EABI.
 714
 715           Since there are major incompatibilities between the legacy ABI and
 716           EABI, especially with regard to structure member alignment, this
 717           option also changes the kernel syscall calling convention to
 718           disambiguate both ABIs and allow for backward compatibility support
 719           (selected with CONFIG_OABI_COMPAT).
 720
 721           To use this you need GCC version 4.0.0 or later.
 722
 723 config OABI_COMPAT
 724         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 725         depends on AEABI && EXPERIMENTAL
 726         default y
 727         help
 728           This option preserves the old syscall interface along with the
 729           new (ARM EABI) one. It also provides a compatibility layer to
 730           intercept syscalls that have structure arguments which layout
 731           in memory differs between the legacy ABI and the new ARM EABI
 732           (only for non "thumb" binaries). This option adds a tiny
 733           overhead to all syscalls and produces a slightly larger kernel.
 734           If you know you'll be using only pure EABI user space then you
 735           can say N here. If this option is not selected and you attempt
 736           to execute a legacy ABI binary then the result will be
 737           UNPREDICTABLE (in fact it can be predicted that it won't work
 738           at all). If in doubt say Y.
 739
 740 config ARCH_DISCONTIGMEM_ENABLE
 741         bool
 742         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 743         help
 744           Say Y to support efficient handling of discontiguous physical memory,
 745           for architectures which are either NUMA (Non-Uniform Memory Access)
 746           or have huge holes in the physical address space for other reasons.
 747           See <file:Documentation/vm/numa> for more.
 748
 749 config NODES_SHIFT
 750         int
 751         default "4" if ARCH_LH7A40X
 752         default "2"
 753         depends on NEED_MULTIPLE_NODES
 754
 755 source "mm/Kconfig"
 756
 757 config LEDS
 758         bool "Timer and CPU usage LEDs"
 759         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 760                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 761                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 762                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 763                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 764                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 765                    ARCH_KS8695 || MACH_RD88F5182
 766         help
 767           If you say Y here, the LEDs on your machine will be used
 768           to provide useful information about your current system status.
 769
 770           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 771           be able to select which LEDs are active using the options below. If
 772           you are compiling a kernel for the EBSA-110 or the LART however, the
 773           red LED will simply flash regularly to indicate that the system is
 774           still functional. It is safe to say Y here if you have a CATS
 775           system, but the driver will do nothing.
 776
 777 config LEDS_TIMER
 778         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 779                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 780                             || MACH_OMAP_PERSEUS2
 781         depends on LEDS
 782         depends on !GENERIC_CLOCKEVENTS
 783         default y if ARCH_EBSA110
 784         help
 785           If you say Y here, one of the system LEDs (the green one on the
 786           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 787           will flash regularly to indicate that the system is still
 788           operational. This is mainly useful to kernel hackers who are
 789           debugging unstable kernels.
 790
 791           The LART uses the same LED for both Timer LED and CPU usage LED
 792           functions. You may choose to use both, but the Timer LED function
 793           will overrule the CPU usage LED.
 794
 795 config LEDS_CPU
 796         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 797                         !ARCH_OMAP) \
 798                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 799                         || MACH_OMAP_PERSEUS2
 800         depends on LEDS
 801         help
 802           If you say Y here, the red LED will be used to give a good real
 803           time indication of CPU usage, by lighting whenever the idle task
 804           is not currently executing.
 805
 806           The LART uses the same LED for both Timer LED and CPU usage LED
 807           functions. You may choose to use both, but the Timer LED function
 808           will overrule the CPU usage LED.
 809
 810 config ALIGNMENT_TRAP
 811         bool
 812         depends on CPU_CP15_MMU
 813         default y if !ARCH_EBSA110
 814         help
 815           ARM processors cannot fetch/store information which is not
 816           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 817           address divisible by 4. On 32-bit ARM processors, these non-aligned
 818           fetch/store instructions will be emulated in software if you say
 819           here, which has a severe performance impact. This is necessary for
 820           correct operation of some network protocols. With an IP-only
 821           configuration it is safe to say N, otherwise say Y.
 822
 823 endmenu
 824
 825 menu "Boot options"
 826
 827 # Compressed boot loader in ROM.  Yes, we really want to ask about
 828 # TEXT and BSS so we preserve their values in the config files.
 829 config ZBOOT_ROM_TEXT
 830         hex "Compressed ROM boot loader base address"
 831         default "0"
 832         help
 833           The physical address at which the ROM-able zImage is to be
 834           placed in the target.  Platforms which normally make use of
 835           ROM-able zImage formats normally set this to a suitable
 836           value in their defconfig file.
 837
 838           If ZBOOT_ROM is not enabled, this has no effect.
 839
 840 config ZBOOT_ROM_BSS
 841         hex "Compressed ROM boot loader BSS address"
 842         default "0"
 843         help
 844           The base address of an area of read/write memory in the target
 845           for the ROM-able zImage which must be available while the
 846           decompressor is running. It must be large enough to hold the
 847           entire decompressed kernel plus an additional 128 KiB.
 848           Platforms which normally make use of ROM-able zImage formats
 849           normally set this to a suitable value in their defconfig file.
 850
 851           If ZBOOT_ROM is not enabled, this has no effect.
 852
 853 config ZBOOT_ROM
 854         bool "Compressed boot loader in ROM/flash"
 855         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 856         help
 857           Say Y here if you intend to execute your compressed kernel image
 858           (zImage) directly from ROM or flash.  If unsure, say N.
 859
 860 config CMDLINE
 861         string "Default kernel command string"
 862         default ""
 863         help
 864           On some architectures (EBSA110 and CATS), there is currently no way
 865           for the boot loader to pass arguments to the kernel. For these
 866           architectures, you should supply some command-line options at build
 867           time by entering them here. As a minimum, you should specify the
 868           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 869
 870 config XIP_KERNEL
 871         bool "Kernel Execute-In-Place from ROM"
 872         depends on !ZBOOT_ROM
 873         help
 874           Execute-In-Place allows the kernel to run from non-volatile storage
 875           directly addressable by the CPU, such as NOR flash. This saves RAM
 876           space since the text section of the kernel is not loaded from flash
 877           to RAM.  Read-write sections, such as the data section and stack,
 878           are still copied to RAM.  The XIP kernel is not compressed since
 879           it has to run directly from flash, so it will take more space to
 880           store it.  The flash address used to link the kernel object files,
 881           and for storing it, is configuration dependent. Therefore, if you
 882           say Y here, you must know the proper physical address where to
 883           store the kernel image depending on your own flash memory usage.
 884
 885           Also note that the make target becomes "make xipImage" rather than
 886           "make zImage" or "make Image".  The final kernel binary to put in
 887           ROM memory will be arch/arm/boot/xipImage.
 888
 889           If unsure, say N.
 890
 891 config XIP_PHYS_ADDR
 892         hex "XIP Kernel Physical Location"
 893         depends on XIP_KERNEL
 894         default "0x00080000"
 895         help
 896           This is the physical address in your flash memory the kernel will
 897           be linked for and stored to.  This address is dependent on your
 898           own flash usage.
 899
 900 config KEXEC
 901         bool "Kexec system call (EXPERIMENTAL)"
 902         depends on EXPERIMENTAL
 903         help
 904           kexec is a system call that implements the ability to shutdown your
 905           current kernel, and to start another kernel.  It is like a reboot
 906           but it is independent of the system firmware.   And like a reboot
 907           you can start any kernel with it, not just Linux.
 908
 909           It is an ongoing process to be certain the hardware in a machine
 910           is properly shutdown, so do not be surprised if this code does not
 911           initially work for you.  It may help to enable device hotplugging
 912           support.
 913
 914 endmenu
 915
 916 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
 917
 918 menu "CPU Frequency scaling"
 919
 920 source "drivers/cpufreq/Kconfig"
 921
 922 config CPU_FREQ_SA1100
 923         bool
 924         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 925         default y
 926
 927 config CPU_FREQ_SA1110
 928         bool
 929         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 930         default y
 931
 932 config CPU_FREQ_INTEGRATOR
 933         tristate "CPUfreq driver for ARM Integrator CPUs"
 934         depends on ARCH_INTEGRATOR && CPU_FREQ
 935         default y
 936         help
 937           This enables the CPUfreq driver for ARM Integrator CPUs.
 938
 939           For details, take a look at <file:Documentation/cpu-freq>.
 940
 941           If in doubt, say Y.
 942
 943 config CPU_FREQ_IMX
 944         tristate "CPUfreq driver for i.MX CPUs"
 945         depends on ARCH_IMX && CPU_FREQ
 946         default n
 947         help
 948           This enables the CPUfreq driver for i.MX CPUs.
 949
 950           If in doubt, say N.
 951
 952 config CPU_FREQ_PXA
 953         bool
 954         depends on CPU_FREQ && ARCH_PXA && PXA25x
 955         default y
 956         select CPU_FREQ_DEFAULT_GOV_USERSPACE
 957
 958 endmenu
 959
 960 endif
 961
 962 menu "Floating point emulation"
 963
 964 comment "At least one emulation must be selected"
 965
 966 config FPE_NWFPE
 967         bool "NWFPE math emulation"
 968         depends on !AEABI || OABI_COMPAT
 969         ---help---
 970           Say Y to include the NWFPE floating point emulator in the kernel.
 971           This is necessary to run most binaries. Linux does not currently
 972           support floating point hardware so you need to say Y here even if
 973           your machine has an FPA or floating point co-processor podule.
 974
 975           You may say N here if you are going to load the Acorn FPEmulator
 976           early in the bootup.
 977
 978 config FPE_NWFPE_XP
 979         bool "Support extended precision"
 980         depends on FPE_NWFPE
 981         help
 982           Say Y to include 80-bit support in the kernel floating-point
 983           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 984           Note that gcc does not generate 80-bit operations by default,
 985           so in most cases this option only enlarges the size of the
 986           floating point emulator without any good reason.
 987
 988           You almost surely want to say N here.
 989
 990 config FPE_FASTFPE
 991         bool "FastFPE math emulation (EXPERIMENTAL)"
 992         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 993         ---help---
 994           Say Y here to include the FAST floating point emulator in the kernel.
 995           This is an experimental much faster emulator which now also has full
 996           precision for the mantissa.  It does not support any exceptions.
 997           It is very simple, and approximately 3-6 times faster than NWFPE.
 998
 999           It should be sufficient for most programs.  It may be not suitable
1000           for scientific calculations, but you have to check this for yourself.
1001           If you do not feel you need a faster FP emulation you should better
1002           choose NWFPE.
1003
1004 config VFP
1005         bool "VFP-format floating point maths"
1006         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1007         help
1008           Say Y to include VFP support code in the kernel. This is needed
1009           if your hardware includes a VFP unit.
1010
1011           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1012           release notes and additional status information.
1013
1014           Say N if your target does not have VFP hardware.
1015
1016 config VFPv3
1017         bool
1018         depends on VFP
1019         default y if CPU_V7
1020
1021 config NEON
1022         bool "Advanced SIMD (NEON) Extension support"
1023         depends on VFPv3 && CPU_V7
1024         help
1025           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1026           Extension.
1027
1028 endmenu
1029
1030 menu "Userspace binary formats"
1031
1032 source "fs/Kconfig.binfmt"
1033
1034 config ARTHUR
1035         tristate "RISC OS personality"
1036         depends on !AEABI
1037         help
1038           Say Y here to include the kernel code necessary if you want to run
1039           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1040           experimental; if this sounds frightening, say N and sleep in peace.
1041           You can also say M here to compile this support as a module (which
1042           will be called arthur).
1043
1044 endmenu
1045
1046 menu "Power management options"
1047
1048 source "kernel/power/Kconfig"
1049
1050 config ARCH_SUSPEND_POSSIBLE
1051         def_bool y
1052
1053 endmenu
1054
1055 source "net/Kconfig"
1056
1057 menu "Device Drivers"
1058
1059 source "drivers/base/Kconfig"
1060
1061 source "drivers/connector/Kconfig"
1062
1063 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1064 source "drivers/mtd/Kconfig"
1065 endif
1066
1067 source "drivers/parport/Kconfig"
1068
1069 source "drivers/pnp/Kconfig"
1070
1071 source "drivers/block/Kconfig"
1072
1073 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1074
1075 source "drivers/misc/Kconfig"
1076
1077 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
1078         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
1079         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
1080         || ARCH_IXP23XX
1081 source "drivers/ide/Kconfig"
1082 endif
1083
1084 source "drivers/scsi/Kconfig"
1085
1086 source "drivers/ata/Kconfig"
1087
1088 source "drivers/md/Kconfig"
1089
1090 source "drivers/message/fusion/Kconfig"
1091
1092 source "drivers/ieee1394/Kconfig"
1093
1094 source "drivers/message/i2o/Kconfig"
1095
1096 source "drivers/net/Kconfig"
1097
1098 source "drivers/isdn/Kconfig"
1099
1100 # input before char - char/joystick depends on it. As does USB.
1101
1102 source "drivers/input/Kconfig"
1103
1104 source "drivers/char/Kconfig"
1105
1106 source "drivers/i2c/Kconfig"
1107
1108 source "drivers/spi/Kconfig"
1109
1110 source "drivers/w1/Kconfig"
1111
1112 source "drivers/power/Kconfig"
1113
1114 source "drivers/hwmon/Kconfig"
1115
1116 source "drivers/watchdog/Kconfig"
1117
1118 source "drivers/ssb/Kconfig"
1119
1120 #source "drivers/l3/Kconfig"
1121
1122 source "drivers/mfd/Kconfig"
1123
1124 source "drivers/media/Kconfig"
1125
1126 source "drivers/video/Kconfig"
1127
1128 source "sound/Kconfig"
1129
1130 source "drivers/hid/Kconfig"
1131
1132 source "drivers/usb/Kconfig"
1133
1134 source "drivers/mmc/Kconfig"
1135
1136 source "drivers/leds/Kconfig"
1137
1138 source "drivers/rtc/Kconfig"
1139
1140 source "drivers/dma/Kconfig"
1141
1142 source "drivers/dca/Kconfig"
1143
1144 endmenu
1145
1146 source "fs/Kconfig"
1147
1148 source "kernel/Kconfig.instrumentation"
1149
1150 source "arch/arm/Kconfig.debug"
1151
1152 source "security/Kconfig"
1153
1154 source "crypto/Kconfig"
1155
1156 source "lib/Kconfig"