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