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