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