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 GENERIC_CLOCKEVENTS_BROADCAST
  39         bool
  40         depends on GENERIC_CLOCKEVENTS
  41         default y if SMP && !LOCAL_TIMERS
  42
  43 config MMU
  44         bool
  45         default y
  46
  47 config NO_IOPORT
  48         bool
  49         default n
  50
  51 config EISA
  52         bool
  53         ---help---
  54           The Extended Industry Standard Architecture (EISA) bus was
  55           developed as an open alternative to the IBM MicroChannel bus.
  56
  57           The EISA bus provided some of the features of the IBM MicroChannel
  58           bus while maintaining backward compatibility with cards made for
  59           the older ISA bus.  The EISA bus saw limited use between 1988 and
  60           1995 when it was made obsolete by the PCI bus.
  61
  62           Say Y here if you are building a kernel for an EISA-based machine.
  63
  64           Otherwise, say N.
  65
  66 config SBUS
  67         bool
  68
  69 config MCA
  70         bool
  71         help
  72           MicroChannel Architecture is found in some IBM PS/2 machines and
  73           laptops.  It is a bus system similar to PCI or ISA. See
  74           <file:Documentation/mca.txt> (and especially the web page given
  75           there) before attempting to build an MCA bus kernel.
  76
  77 config GENERIC_HARDIRQS
  78         bool
  79         default y
  80
  81 config STACKTRACE_SUPPORT
  82         bool
  83         default y
  84
  85 config LOCKDEP_SUPPORT
  86         bool
  87         default y
  88
  89 config TRACE_IRQFLAGS_SUPPORT
  90         bool
  91         default y
  92
  93 config HARDIRQS_SW_RESEND
  94         bool
  95         default y
  96
  97 config GENERIC_IRQ_PROBE
  98         bool
  99         default y
 100
 101 config GENERIC_LOCKBREAK
 102         bool
 103         default y
 104         depends on SMP && PREEMPT
 105
 106 config RWSEM_GENERIC_SPINLOCK
 107         bool
 108         default y
 109
 110 config RWSEM_XCHGADD_ALGORITHM
 111         bool
 112
 113 config ARCH_HAS_ILOG2_U32
 114         bool
 115         default n
 116
 117 config ARCH_HAS_ILOG2_U64
 118         bool
 119         default n
 120
 121 config GENERIC_HWEIGHT
 122         bool
 123         default y
 124
 125 config GENERIC_CALIBRATE_DELAY
 126         bool
 127         default y
 128
 129 config ARCH_MAY_HAVE_PC_FDC
 130         bool
 131
 132 config ZONE_DMA
 133         bool
 134         default y
 135
 136 config GENERIC_ISA_DMA
 137         bool
 138
 139 config FIQ
 140         bool
 141
 142 config ARCH_MTD_XIP
 143         bool
 144
 145 if OPROFILE
 146
 147 config OPROFILE_ARMV6
 148         def_bool y
 149         depends on CPU_V6 && !SMP
 150         select OPROFILE_ARM11_CORE
 151
 152 config OPROFILE_MPCORE
 153         def_bool y
 154         depends on CPU_V6 && SMP
 155         select OPROFILE_ARM11_CORE
 156
 157 config OPROFILE_ARM11_CORE
 158         bool
 159
 160 endif
 161
 162 config VECTORS_BASE
 163         hex
 164         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 165         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 166         default 0x00000000
 167         help
 168           The base address of exception vectors.
 169
 170 source "init/Kconfig"
 171
 172 menu "System Type"
 173
 174 choice
 175         prompt "ARM system type"
 176         default ARCH_VERSATILE
 177
 178 config ARCH_AAEC2000
 179         bool "Agilent AAEC-2000 based"
 180         select ARM_AMBA
 181         help
 182           This enables support for systems based on the Agilent AAEC-2000
 183
 184 config ARCH_INTEGRATOR
 185         bool "ARM Ltd. Integrator family"
 186         select ARM_AMBA
 187         select ICST525
 188         help
 189           Support for ARM's Integrator platform.
 190
 191 config ARCH_REALVIEW
 192         bool "ARM Ltd. RealView family"
 193         select ARM_AMBA
 194         select ICST307
 195         select GENERIC_TIME
 196         select GENERIC_CLOCKEVENTS
 197         help
 198           This enables support for ARM Ltd RealView boards.
 199
 200 config ARCH_VERSATILE
 201         bool "ARM Ltd. Versatile family"
 202         select ARM_AMBA
 203         select ARM_VIC
 204         select ICST307
 205         select GENERIC_TIME
 206         select GENERIC_CLOCKEVENTS
 207         help
 208           This enables support for ARM Ltd Versatile board.
 209
 210 config ARCH_AT91
 211         bool "Atmel AT91"
 212         select GENERIC_GPIO
 213         help
 214           This enables support for systems based on the Atmel AT91RM9200,
 215           AT91SAM9 and AT91CAP9 processors.
 216
 217 config ARCH_CLPS7500
 218         bool "Cirrus CL-PS7500FE"
 219         select TIMER_ACORN
 220         select ISA
 221         select NO_IOPORT
 222         help
 223           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 224
 225 config ARCH_CLPS711X
 226         bool "Cirrus Logic CLPS711x/EP721x-based"
 227         help
 228           Support for Cirrus Logic 711x/721x based boards.
 229
 230 config ARCH_CO285
 231         bool "Co-EBSA285"
 232         select FOOTBRIDGE
 233         select FOOTBRIDGE_ADDIN
 234         help
 235           Support for Intel's EBSA285 companion chip.
 236
 237 config ARCH_EBSA110
 238         bool "EBSA-110"
 239         select ISA
 240         select NO_IOPORT
 241         help
 242           This is an evaluation board for the StrongARM processor available
 243           from Digital. It has limited hardware on-board, including an
 244           Ethernet interface, two PCMCIA sockets, two serial ports and a
 245           parallel port.
 246
 247 config ARCH_EP93XX
 248         bool "EP93xx-based"
 249         select ARM_AMBA
 250         select ARM_VIC
 251         select GENERIC_GPIO
 252         help
 253           This enables support for the Cirrus EP93xx series of CPUs.
 254
 255 config ARCH_FOOTBRIDGE
 256         bool "FootBridge"
 257         select FOOTBRIDGE
 258         help
 259           Support for systems based on the DC21285 companion chip
 260           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 261
 262 config ARCH_NETX
 263         bool "Hilscher NetX based"
 264         select ARM_VIC
 265         help
 266           This enables support for systems based on the Hilscher NetX Soc
 267
 268 config ARCH_H720X
 269         bool "Hynix HMS720x-based"
 270         select ISA_DMA_API
 271         help
 272           This enables support for systems based on the Hynix HMS720x
 273
 274 config ARCH_IMX
 275         bool "IMX"
 276         select GENERIC_GPIO
 277         select GENERIC_TIME
 278         select GENERIC_CLOCKEVENTS
 279         help
 280           Support for Motorola's i.MX family of processors (MX1, MXL).
 281
 282 config ARCH_IOP13XX
 283         bool "IOP13xx-based"
 284         depends on MMU
 285         select PLAT_IOP
 286         select PCI
 287         select ARCH_SUPPORTS_MSI
 288         help
 289           Support for Intel's IOP13XX (XScale) family of processors.
 290
 291 config ARCH_IOP32X
 292         bool "IOP32x-based"
 293         depends on MMU
 294         select PLAT_IOP
 295         select PCI
 296         help
 297           Support for Intel's 80219 and IOP32X (XScale) family of
 298           processors.
 299
 300 config ARCH_IOP33X
 301         bool "IOP33x-based"
 302         depends on MMU
 303         select PLAT_IOP
 304         select PCI
 305         help
 306           Support for Intel's IOP33X (XScale) family of processors.
 307
 308 config ARCH_IXP23XX
 309         bool "IXP23XX-based"
 310         depends on MMU
 311         select PCI
 312         help
 313           Support for Intel's IXP23xx (XScale) family of processors.
 314
 315 config ARCH_IXP2000
 316         bool "IXP2400/2800-based"
 317         depends on MMU
 318         select PCI
 319         help
 320           Support for Intel's IXP2400/2800 (XScale) family of processors.
 321
 322 config ARCH_IXP4XX
 323         bool "IXP4xx-based"
 324         depends on MMU
 325         select GENERIC_GPIO
 326         select GENERIC_TIME
 327         select GENERIC_CLOCKEVENTS
 328         help
 329           Support for Intel's IXP4XX (XScale) family of processors.
 330
 331 config ARCH_L7200
 332         bool "LinkUp-L7200"
 333         select FIQ
 334         help
 335           Say Y here if you intend to run this kernel on a LinkUp Systems
 336           L7200 Software Development Board which uses an ARM720T processor.
 337           Information on this board can be obtained at:
 338
 339           <http://www.linkupsys.com/>
 340
 341           If you have any questions or comments about the Linux kernel port
 342           to this board, send e-mail to <sjhill@cotw.com>.
 343
 344 config ARCH_KS8695
 345         bool "Micrel/Kendin KS8695"
 346         select GENERIC_GPIO
 347         help
 348           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 349           System-on-Chip devices.
 350
 351 config ARCH_NS9XXX
 352         bool "NetSilicon NS9xxx"
 353         select GENERIC_GPIO
 354         select GENERIC_TIME
 355         select GENERIC_CLOCKEVENTS
 356         help
 357           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 358           System.
 359
 360           <http://www.digi.com/products/microprocessors/index.jsp>
 361
 362 config ARCH_MXC
 363         bool "Freescale MXC/iMX-based"
 364         select ARCH_MTD_XIP
 365         help
 366           Support for Freescale MXC/iMX-based family of processors
 367
 368 config ARCH_ORION
 369         bool "Marvell Orion"
 370         depends on MMU
 371         select PCI
 372         select GENERIC_GPIO
 373         select GENERIC_TIME
 374         select GENERIC_CLOCKEVENTS
 375         help
 376           Support for Marvell Orion System on Chip family.
 377
 378 config ARCH_PNX4008
 379         bool "Philips Nexperia PNX4008 Mobile"
 380         help
 381           This enables support for Philips PNX4008 mobile platform.
 382
 383 config ARCH_PXA
 384         bool "PXA2xx/PXA3xx-based"
 385         depends on MMU
 386         select ARCH_MTD_XIP
 387         select GENERIC_GPIO
 388         select HAVE_GPIO_LIB
 389         select GENERIC_TIME
 390         select GENERIC_CLOCKEVENTS
 391         select TICK_ONESHOT
 392         help
 393           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 394
 395 config ARCH_RPC
 396         bool "RiscPC"
 397         select ARCH_ACORN
 398         select FIQ
 399         select TIMER_ACORN
 400         select ARCH_MAY_HAVE_PC_FDC
 401         select ISA_DMA_API
 402         select NO_IOPORT
 403         help
 404           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 405           CD-ROM interface, serial and parallel port, and the floppy drive.
 406
 407 config ARCH_SA1100
 408         bool "SA1100-based"
 409         select ISA
 410         select ARCH_DISCONTIGMEM_ENABLE
 411         select ARCH_MTD_XIP
 412         select GENERIC_GPIO
 413         select GENERIC_TIME
 414         help
 415           Support for StrongARM 11x0 based boards.
 416
 417 config ARCH_S3C2410
 418         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 419         select GENERIC_GPIO
 420         help
 421           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 422           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 423           the Samsung SMDK2410 development board (and derivatives).
 424
 425 config ARCH_SHARK
 426         bool "Shark"
 427         select ISA
 428         select ISA_DMA
 429         select PCI
 430         help
 431           Support for the StrongARM based Digital DNARD machine, also known
 432           as "Shark" (<http://www.shark-linux.de/shark.html>).
 433
 434 config ARCH_LH7A40X
 435         bool "Sharp LH7A40X"
 436         help
 437           Say Y here for systems based on one of the Sharp LH7A40X
 438           System on a Chip processors.  These CPUs include an ARM922T
 439           core with a wide array of integrated devices for
 440           hand-held and low-power applications.
 441
 442 config ARCH_DAVINCI
 443         bool "TI DaVinci"
 444         select GENERIC_TIME
 445         select GENERIC_CLOCKEVENTS
 446         select GENERIC_GPIO
 447         help
 448           Support for TI's DaVinci platform.
 449
 450 config ARCH_OMAP
 451         bool "TI OMAP"
 452         select GENERIC_GPIO
 453         select GENERIC_TIME
 454         help
 455           Support for TI's OMAP platform (OMAP1 and OMAP2).
 456
 457 config ARCH_MSM7X00A
 458         bool "Qualcomm MSM7X00A"
 459         select GENERIC_TIME
 460         select GENERIC_CLOCKEVENTS
 461         help
 462           Support for Qualcomm MSM7X00A based systems.  This runs on the ARM11
 463           apps processor of the MSM7X00A and depends on a shared memory
 464           interface to the ARM9 modem processor which runs the baseband stack
 465           and controls some vital subsystems (clock and power control, etc).
 466           <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
 467
 468 endchoice
 469
 470 source "arch/arm/mach-clps711x/Kconfig"
 471
 472 source "arch/arm/mach-ep93xx/Kconfig"
 473
 474 source "arch/arm/mach-footbridge/Kconfig"
 475
 476 source "arch/arm/mach-integrator/Kconfig"
 477
 478 source "arch/arm/mach-iop32x/Kconfig"
 479
 480 source "arch/arm/mach-iop33x/Kconfig"
 481
 482 source "arch/arm/mach-iop13xx/Kconfig"
 483
 484 source "arch/arm/mach-ixp4xx/Kconfig"
 485
 486 source "arch/arm/mach-ixp2000/Kconfig"
 487
 488 source "arch/arm/mach-ixp23xx/Kconfig"
 489
 490 source "arch/arm/mach-pxa/Kconfig"
 491
 492 source "arch/arm/mach-sa1100/Kconfig"
 493
 494 source "arch/arm/plat-omap/Kconfig"
 495
 496 source "arch/arm/mach-omap1/Kconfig"
 497
 498 source "arch/arm/mach-omap2/Kconfig"
 499
 500 source "arch/arm/mach-orion/Kconfig"
 501
 502 source "arch/arm/plat-s3c24xx/Kconfig"
 503 source "arch/arm/plat-s3c/Kconfig"
 504
 505 if ARCH_S3C2410
 506 source "arch/arm/mach-s3c2400/Kconfig"
 507 source "arch/arm/mach-s3c2410/Kconfig"
 508 source "arch/arm/mach-s3c2412/Kconfig"
 509 source "arch/arm/mach-s3c2440/Kconfig"
 510 source "arch/arm/mach-s3c2442/Kconfig"
 511 source "arch/arm/mach-s3c2443/Kconfig"
 512 endif
 513
 514 source "arch/arm/mach-lh7a40x/Kconfig"
 515
 516 source "arch/arm/mach-imx/Kconfig"
 517
 518 source "arch/arm/mach-h720x/Kconfig"
 519
 520 source "arch/arm/mach-versatile/Kconfig"
 521
 522 source "arch/arm/mach-aaec2000/Kconfig"
 523
 524 source "arch/arm/mach-realview/Kconfig"
 525
 526 source "arch/arm/mach-at91/Kconfig"
 527
 528 source "arch/arm/plat-mxc/Kconfig"
 529
 530 source "arch/arm/mach-netx/Kconfig"
 531
 532 source "arch/arm/mach-ns9xxx/Kconfig"
 533
 534 source "arch/arm/mach-davinci/Kconfig"
 535
 536 source "arch/arm/mach-ks8695/Kconfig"
 537
 538 source "arch/arm/mach-msm/Kconfig"
 539
 540 # Definitions to make life easier
 541 config ARCH_ACORN
 542         bool
 543
 544 config PLAT_IOP
 545         bool
 546
 547 source arch/arm/mm/Kconfig
 548
 549 config IWMMXT
 550         bool "Enable iWMMXt support"
 551         depends on CPU_XSCALE || CPU_XSC3
 552         default y if PXA27x || PXA3xx
 553         help
 554           Enable support for iWMMXt context switching at run time if
 555           running on a CPU that supports it.
 556
 557 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 558 config XSCALE_PMU
 559         bool
 560         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 561         default y
 562
 563 if !MMU
 564 source "arch/arm/Kconfig-nommu"
 565 endif
 566
 567 endmenu
 568
 569 source "arch/arm/common/Kconfig"
 570
 571 config FORCE_MAX_ZONEORDER
 572         int
 573         depends on SA1111
 574         default "9"
 575
 576 menu "Bus support"
 577
 578 config ARM_AMBA
 579         bool
 580
 581 config ISA
 582         bool
 583         help
 584           Find out whether you have ISA slots on your motherboard.  ISA is the
 585           name of a bus system, i.e. the way the CPU talks to the other stuff
 586           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 587           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 588           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 589
 590 # Select ISA DMA controller support
 591 config ISA_DMA
 592         bool
 593         select ISA_DMA_API
 594
 595 # Select ISA DMA interface
 596 config ISA_DMA_API
 597         bool
 598
 599 config PCI
 600         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 601         help
 602           Find out whether you have a PCI motherboard. PCI is the name of a
 603           bus system, i.e. the way the CPU talks to the other stuff inside
 604           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 605           VESA. If you have PCI, say Y, otherwise N.
 606
 607 config PCI_SYSCALL
 608         def_bool PCI
 609
 610 # Select the host bridge type
 611 config PCI_HOST_VIA82C505
 612         bool
 613         depends on PCI && ARCH_SHARK
 614         default y
 615
 616 config PCI_HOST_ITE8152
 617         bool
 618         depends on PCI && MACH_ARMCORE
 619         default y
 620         select DMABOUNCE
 621
 622 source "drivers/pci/Kconfig"
 623
 624 source "drivers/pcmcia/Kconfig"
 625
 626 endmenu
 627
 628 menu "Kernel Features"
 629
 630 source "kernel/time/Kconfig"
 631
 632 config SMP
 633         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 634         depends on EXPERIMENTAL && REALVIEW_EB_ARM11MP
 635         help
 636           This enables support for systems with more than one CPU. If you have
 637           a system with only one CPU, like most personal computers, say N. If
 638           you have a system with more than one CPU, say Y.
 639
 640           If you say N here, the kernel will run on single and multiprocessor
 641           machines, but will use only one CPU of a multiprocessor machine. If
 642           you say Y here, the kernel will run on many, but not all, single
 643           processor machines. On a single processor machine, the kernel will
 644           run faster if you say N here.
 645
 646           See also <file:Documentation/i386/IO-APIC.txt>,
 647           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 648           <http://www.linuxdoc.org/docs.html#howto>.
 649
 650           If you don't know what to do here, say N.
 651
 652 config NR_CPUS
 653         int "Maximum number of CPUs (2-32)"
 654         range 2 32
 655         depends on SMP
 656         default "4"
 657
 658 config HOTPLUG_CPU
 659         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 660         depends on SMP && HOTPLUG && EXPERIMENTAL
 661         help
 662           Say Y here to experiment with turning CPUs off and on.  CPUs
 663           can be controlled through /sys/devices/system/cpu.
 664
 665 config LOCAL_TIMERS
 666         bool "Use local timer interrupts"
 667         depends on SMP && REALVIEW_EB_ARM11MP
 668         default y
 669         help
 670           Enable support for local timers on SMP platforms, rather then the
 671           legacy IPI broadcast method.  Local timers allows the system
 672           accounting to be spread across the timer interval, preventing a
 673           "thundering herd" at every timer tick.
 674
 675 config PREEMPT
 676         bool "Preemptible Kernel (EXPERIMENTAL)"
 677         depends on EXPERIMENTAL
 678         help
 679           This option reduces the latency of the kernel when reacting to
 680           real-time or interactive events by allowing a low priority process to
 681           be preempted even if it is in kernel mode executing a system call.
 682           This allows applications to run more reliably even when the system is
 683           under load.
 684
 685           Say Y here if you are building a kernel for a desktop, embedded
 686           or real-time system.  Say N if you are unsure.
 687
 688 config NO_IDLE_HZ
 689         bool "Dynamic tick timer"
 690         depends on !GENERIC_CLOCKEVENTS
 691         help
 692           Select this option if you want to disable continuous timer ticks
 693           and have them programmed to occur as required. This option saves
 694           power as the system can remain in idle state for longer.
 695
 696           By default dynamic tick is disabled during the boot, and can be
 697           manually enabled with:
 698
 699             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 700
 701           Alternatively, if you want dynamic tick automatically enabled
 702           during boot, pass "dyntick=enable" via the kernel command string.
 703
 704           Please note that dynamic tick may affect the accuracy of
 705           timekeeping on some platforms depending on the implementation.
 706           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 707           to have accurate timekeeping with dynamic tick.
 708
 709 config HZ
 710         int
 711         default 128 if ARCH_L7200
 712         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 713         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 714         default AT91_TIMER_HZ if ARCH_AT91
 715         default 100
 716
 717 config AEABI
 718         bool "Use the ARM EABI to compile the kernel"
 719         help
 720           This option allows for the kernel to be compiled using the latest
 721           ARM ABI (aka EABI).  This is only useful if you are using a user
 722           space environment that is also compiled with EABI.
 723
 724           Since there are major incompatibilities between the legacy ABI and
 725           EABI, especially with regard to structure member alignment, this
 726           option also changes the kernel syscall calling convention to
 727           disambiguate both ABIs and allow for backward compatibility support
 728           (selected with CONFIG_OABI_COMPAT).
 729
 730           To use this you need GCC version 4.0.0 or later.
 731
 732 config OABI_COMPAT
 733         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 734         depends on AEABI && EXPERIMENTAL
 735         default y
 736         help
 737           This option preserves the old syscall interface along with the
 738           new (ARM EABI) one. It also provides a compatibility layer to
 739           intercept syscalls that have structure arguments which layout
 740           in memory differs between the legacy ABI and the new ARM EABI
 741           (only for non "thumb" binaries). This option adds a tiny
 742           overhead to all syscalls and produces a slightly larger kernel.
 743           If you know you'll be using only pure EABI user space then you
 744           can say N here. If this option is not selected and you attempt
 745           to execute a legacy ABI binary then the result will be
 746           UNPREDICTABLE (in fact it can be predicted that it won't work
 747           at all). If in doubt say Y.
 748
 749 config ARCH_DISCONTIGMEM_ENABLE
 750         bool
 751         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 752         help
 753           Say Y to support efficient handling of discontiguous physical memory,
 754           for architectures which are either NUMA (Non-Uniform Memory Access)
 755           or have huge holes in the physical address space for other reasons.
 756           See <file:Documentation/vm/numa> for more.
 757
 758 config NODES_SHIFT
 759         int
 760         default "4" if ARCH_LH7A40X
 761         default "2"
 762         depends on NEED_MULTIPLE_NODES
 763
 764 source "mm/Kconfig"
 765
 766 config LEDS
 767         bool "Timer and CPU usage LEDs"
 768         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 769                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 770                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 771                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 772                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 773                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 774                    ARCH_KS8695 || MACH_RD88F5182
 775         help
 776           If you say Y here, the LEDs on your machine will be used
 777           to provide useful information about your current system status.
 778
 779           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 780           be able to select which LEDs are active using the options below. If
 781           you are compiling a kernel for the EBSA-110 or the LART however, the
 782           red LED will simply flash regularly to indicate that the system is
 783           still functional. It is safe to say Y here if you have a CATS
 784           system, but the driver will do nothing.
 785
 786 config LEDS_TIMER
 787         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 788                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 789                             || MACH_OMAP_PERSEUS2
 790         depends on LEDS
 791         depends on !GENERIC_CLOCKEVENTS
 792         default y if ARCH_EBSA110
 793         help
 794           If you say Y here, one of the system LEDs (the green one on the
 795           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 796           will flash regularly to indicate that the system is still
 797           operational. This is mainly useful to kernel hackers who are
 798           debugging unstable kernels.
 799
 800           The LART uses the same LED for both Timer LED and CPU usage LED
 801           functions. You may choose to use both, but the Timer LED function
 802           will overrule the CPU usage LED.
 803
 804 config LEDS_CPU
 805         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 806                         !ARCH_OMAP) \
 807                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 808                         || MACH_OMAP_PERSEUS2
 809         depends on LEDS
 810         help
 811           If you say Y here, the red LED will be used to give a good real
 812           time indication of CPU usage, by lighting whenever the idle task
 813           is not currently executing.
 814
 815           The LART uses the same LED for both Timer LED and CPU usage LED
 816           functions. You may choose to use both, but the Timer LED function
 817           will overrule the CPU usage LED.
 818
 819 config ALIGNMENT_TRAP
 820         bool
 821         depends on CPU_CP15_MMU
 822         default y if !ARCH_EBSA110
 823         help
 824           ARM processors cannot fetch/store information which is not
 825           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 826           address divisible by 4. On 32-bit ARM processors, these non-aligned
 827           fetch/store instructions will be emulated in software if you say
 828           here, which has a severe performance impact. This is necessary for
 829           correct operation of some network protocols. With an IP-only
 830           configuration it is safe to say N, otherwise say Y.
 831
 832 endmenu
 833
 834 menu "Boot options"
 835
 836 # Compressed boot loader in ROM.  Yes, we really want to ask about
 837 # TEXT and BSS so we preserve their values in the config files.
 838 config ZBOOT_ROM_TEXT
 839         hex "Compressed ROM boot loader base address"
 840         default "0"
 841         help
 842           The physical address at which the ROM-able zImage is to be
 843           placed in the target.  Platforms which normally make use of
 844           ROM-able zImage formats normally set this to a suitable
 845           value in their defconfig file.
 846
 847           If ZBOOT_ROM is not enabled, this has no effect.
 848
 849 config ZBOOT_ROM_BSS
 850         hex "Compressed ROM boot loader BSS address"
 851         default "0"
 852         help
 853           The base address of an area of read/write memory in the target
 854           for the ROM-able zImage which must be available while the
 855           decompressor is running. It must be large enough to hold the
 856           entire decompressed kernel plus an additional 128 KiB.
 857           Platforms which normally make use of ROM-able zImage formats
 858           normally set this to a suitable value in their defconfig file.
 859
 860           If ZBOOT_ROM is not enabled, this has no effect.
 861
 862 config ZBOOT_ROM
 863         bool "Compressed boot loader in ROM/flash"
 864         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 865         help
 866           Say Y here if you intend to execute your compressed kernel image
 867           (zImage) directly from ROM or flash.  If unsure, say N.
 868
 869 config CMDLINE
 870         string "Default kernel command string"
 871         default ""
 872         help
 873           On some architectures (EBSA110 and CATS), there is currently no way
 874           for the boot loader to pass arguments to the kernel. For these
 875           architectures, you should supply some command-line options at build
 876           time by entering them here. As a minimum, you should specify the
 877           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 878
 879 config XIP_KERNEL
 880         bool "Kernel Execute-In-Place from ROM"
 881         depends on !ZBOOT_ROM
 882         help
 883           Execute-In-Place allows the kernel to run from non-volatile storage
 884           directly addressable by the CPU, such as NOR flash. This saves RAM
 885           space since the text section of the kernel is not loaded from flash
 886           to RAM.  Read-write sections, such as the data section and stack,
 887           are still copied to RAM.  The XIP kernel is not compressed since
 888           it has to run directly from flash, so it will take more space to
 889           store it.  The flash address used to link the kernel object files,
 890           and for storing it, is configuration dependent. Therefore, if you
 891           say Y here, you must know the proper physical address where to
 892           store the kernel image depending on your own flash memory usage.
 893
 894           Also note that the make target becomes "make xipImage" rather than
 895           "make zImage" or "make Image".  The final kernel binary to put in
 896           ROM memory will be arch/arm/boot/xipImage.
 897
 898           If unsure, say N.
 899
 900 config XIP_PHYS_ADDR
 901         hex "XIP Kernel Physical Location"
 902         depends on XIP_KERNEL
 903         default "0x00080000"
 904         help
 905           This is the physical address in your flash memory the kernel will
 906           be linked for and stored to.  This address is dependent on your
 907           own flash usage.
 908
 909 config KEXEC
 910         bool "Kexec system call (EXPERIMENTAL)"
 911         depends on EXPERIMENTAL
 912         help
 913           kexec is a system call that implements the ability to shutdown your
 914           current kernel, and to start another kernel.  It is like a reboot
 915           but it is independent of the system firmware.   And like a reboot
 916           you can start any kernel with it, not just Linux.
 917
 918           It is an ongoing process to be certain the hardware in a machine
 919           is properly shutdown, so do not be surprised if this code does not
 920           initially work for you.  It may help to enable device hotplugging
 921           support.
 922
 923 config ATAGS_PROC
 924         bool "Export atags in procfs"
 925         default n
 926         help
 927           Should the atags used to boot the kernel be exported in an "atags"
 928           file in procfs. Useful with kexec.
 929
 930 endmenu
 931
 932 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
 933
 934 menu "CPU Frequency scaling"
 935
 936 source "drivers/cpufreq/Kconfig"
 937
 938 config CPU_FREQ_SA1100
 939         bool
 940         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 941         default y
 942
 943 config CPU_FREQ_SA1110
 944         bool
 945         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 946         default y
 947
 948 config CPU_FREQ_INTEGRATOR
 949         tristate "CPUfreq driver for ARM Integrator CPUs"
 950         depends on ARCH_INTEGRATOR && CPU_FREQ
 951         default y
 952         help
 953           This enables the CPUfreq driver for ARM Integrator CPUs.
 954
 955           For details, take a look at <file:Documentation/cpu-freq>.
 956
 957           If in doubt, say Y.
 958
 959 config CPU_FREQ_IMX
 960         tristate "CPUfreq driver for i.MX CPUs"
 961         depends on ARCH_IMX && CPU_FREQ
 962         default n
 963         help
 964           This enables the CPUfreq driver for i.MX CPUs.
 965
 966           If in doubt, say N.
 967
 968 config CPU_FREQ_PXA
 969         bool
 970         depends on CPU_FREQ && ARCH_PXA && PXA25x
 971         default y
 972         select CPU_FREQ_DEFAULT_GOV_USERSPACE
 973
 974 endmenu
 975
 976 endif
 977
 978 menu "Floating point emulation"
 979
 980 comment "At least one emulation must be selected"
 981
 982 config FPE_NWFPE
 983         bool "NWFPE math emulation"
 984         depends on !AEABI || OABI_COMPAT
 985         ---help---
 986           Say Y to include the NWFPE floating point emulator in the kernel.
 987           This is necessary to run most binaries. Linux does not currently
 988           support floating point hardware so you need to say Y here even if
 989           your machine has an FPA or floating point co-processor podule.
 990
 991           You may say N here if you are going to load the Acorn FPEmulator
 992           early in the bootup.
 993
 994 config FPE_NWFPE_XP
 995         bool "Support extended precision"
 996         depends on FPE_NWFPE
 997         help
 998           Say Y to include 80-bit support in the kernel floating-point
 999           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1000           Note that gcc does not generate 80-bit operations by default,
1001           so in most cases this option only enlarges the size of the
1002           floating point emulator without any good reason.
1003
1004           You almost surely want to say N here.
1005
1006 config FPE_FASTFPE
1007         bool "FastFPE math emulation (EXPERIMENTAL)"
1008         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1009         ---help---
1010           Say Y here to include the FAST floating point emulator in the kernel.
1011           This is an experimental much faster emulator which now also has full
1012           precision for the mantissa.  It does not support any exceptions.
1013           It is very simple, and approximately 3-6 times faster than NWFPE.
1014
1015           It should be sufficient for most programs.  It may be not suitable
1016           for scientific calculations, but you have to check this for yourself.
1017           If you do not feel you need a faster FP emulation you should better
1018           choose NWFPE.
1019
1020 config VFP
1021         bool "VFP-format floating point maths"
1022         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1023         help
1024           Say Y to include VFP support code in the kernel. This is needed
1025           if your hardware includes a VFP unit.
1026
1027           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1028           release notes and additional status information.
1029
1030           Say N if your target does not have VFP hardware.
1031
1032 config VFPv3
1033         bool
1034         depends on VFP
1035         default y if CPU_V7
1036
1037 config NEON
1038         bool "Advanced SIMD (NEON) Extension support"
1039         depends on VFPv3 && CPU_V7
1040         help
1041           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1042           Extension.
1043
1044 endmenu
1045
1046 menu "Userspace binary formats"
1047
1048 source "fs/Kconfig.binfmt"
1049
1050 config ARTHUR
1051         tristate "RISC OS personality"
1052         depends on !AEABI
1053         help
1054           Say Y here to include the kernel code necessary if you want to run
1055           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1056           experimental; if this sounds frightening, say N and sleep in peace.
1057           You can also say M here to compile this support as a module (which
1058           will be called arthur).
1059
1060 endmenu
1061
1062 menu "Power management options"
1063
1064 source "kernel/power/Kconfig"
1065
1066 config ARCH_SUSPEND_POSSIBLE
1067         def_bool y
1068
1069 endmenu
1070
1071 source "net/Kconfig"
1072
1073 menu "Device Drivers"
1074
1075 source "drivers/base/Kconfig"
1076
1077 source "drivers/connector/Kconfig"
1078
1079 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1080 source "drivers/mtd/Kconfig"
1081 endif
1082
1083 source "drivers/parport/Kconfig"
1084
1085 source "drivers/pnp/Kconfig"
1086
1087 source "drivers/block/Kconfig"
1088
1089 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1090
1091 source "drivers/misc/Kconfig"
1092
1093 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
1094         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
1095         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
1096         || ARCH_IXP23XX
1097 source "drivers/ide/Kconfig"
1098 endif
1099
1100 source "drivers/scsi/Kconfig"
1101
1102 source "drivers/ata/Kconfig"
1103
1104 source "drivers/md/Kconfig"
1105
1106 source "drivers/message/fusion/Kconfig"
1107
1108 source "drivers/ieee1394/Kconfig"
1109
1110 source "drivers/message/i2o/Kconfig"
1111
1112 source "drivers/net/Kconfig"
1113
1114 source "drivers/isdn/Kconfig"
1115
1116 # input before char - char/joystick depends on it. As does USB.
1117
1118 source "drivers/input/Kconfig"
1119
1120 source "drivers/char/Kconfig"
1121
1122 source "drivers/i2c/Kconfig"
1123
1124 source "drivers/spi/Kconfig"
1125
1126 source "drivers/gpio/Kconfig"
1127
1128 source "drivers/w1/Kconfig"
1129
1130 source "drivers/power/Kconfig"
1131
1132 source "drivers/hwmon/Kconfig"
1133
1134 source "drivers/watchdog/Kconfig"
1135
1136 source "drivers/ssb/Kconfig"
1137
1138 #source "drivers/l3/Kconfig"
1139
1140 source "drivers/mfd/Kconfig"
1141
1142 source "drivers/media/Kconfig"
1143
1144 source "drivers/video/Kconfig"
1145
1146 source "sound/Kconfig"
1147
1148 source "drivers/hid/Kconfig"
1149
1150 source "drivers/usb/Kconfig"
1151
1152 source "drivers/mmc/Kconfig"
1153
1154 source "drivers/leds/Kconfig"
1155
1156 source "drivers/rtc/Kconfig"
1157
1158 source "drivers/dma/Kconfig"
1159
1160 source "drivers/dca/Kconfig"
1161
1162 endmenu
1163
1164 source "fs/Kconfig"
1165
1166 source "arch/arm/Kconfig.debug"
1167
1168 source "security/Kconfig"
1169
1170 source "crypto/Kconfig"
1171
1172 source "lib/Kconfig"