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