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