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 HAVE_IDE
  12         select RTC_LIB
  13         select SYS_SUPPORTS_APM_EMULATION
  14         select HAVE_OPROFILE
  15         select HAVE_KPROBES if (!XIP_KERNEL)
  16         select HAVE_KRETPROBES if (HAVE_KPROBES)
  17         help
  18           The ARM series is a line of low-power-consumption RISC chip designs
  19           licensed by ARM Ltd and targeted at embedded applications and
  20           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  21           manufactured, but legacy ARM-based PC hardware remains popular in
  22           Europe.  There is an ARM Linux project with a web page at
  23           <http://www.arm.linux.org.uk/>.
  24
  25 config SYS_SUPPORTS_APM_EMULATION
  26         bool
  27
  28 config GENERIC_GPIO
  29         bool
  30         default n
  31
  32 config GENERIC_TIME
  33         bool
  34         default n
  35
  36 config GENERIC_CLOCKEVENTS
  37         bool
  38         default n
  39
  40 config GENERIC_CLOCKEVENTS_BROADCAST
  41         bool
  42         depends on GENERIC_CLOCKEVENTS
  43         default y if SMP && !LOCAL_TIMERS
  44
  45 config MMU
  46         bool
  47         default y
  48
  49 config NO_IOPORT
  50         bool
  51         default n
  52
  53 config EISA
  54         bool
  55         ---help---
  56           The Extended Industry Standard Architecture (EISA) bus was
  57           developed as an open alternative to the IBM MicroChannel bus.
  58
  59           The EISA bus provided some of the features of the IBM MicroChannel
  60           bus while maintaining backward compatibility with cards made for
  61           the older ISA bus.  The EISA bus saw limited use between 1988 and
  62           1995 when it was made obsolete by the PCI bus.
  63
  64           Say Y here if you are building a kernel for an EISA-based machine.
  65
  66           Otherwise, say N.
  67
  68 config SBUS
  69         bool
  70
  71 config MCA
  72         bool
  73         help
  74           MicroChannel Architecture is found in some IBM PS/2 machines and
  75           laptops.  It is a bus system similar to PCI or ISA. See
  76           <file:Documentation/mca.txt> (and especially the web page given
  77           there) before attempting to build an MCA bus kernel.
  78
  79 config GENERIC_HARDIRQS
  80         bool
  81         default y
  82
  83 config STACKTRACE_SUPPORT
  84         bool
  85         default y
  86
  87 config HAVE_LATENCYTOP_SUPPORT
  88         bool
  89         depends on !SMP
  90         default y
  91
  92 config LOCKDEP_SUPPORT
  93         bool
  94         default y
  95
  96 config TRACE_IRQFLAGS_SUPPORT
  97         bool
  98         default y
  99
 100 config HARDIRQS_SW_RESEND
 101         bool
 102         default y
 103
 104 config GENERIC_IRQ_PROBE
 105         bool
 106         default y
 107
 108 config GENERIC_LOCKBREAK
 109         bool
 110         default y
 111         depends on SMP && PREEMPT
 112
 113 config RWSEM_GENERIC_SPINLOCK
 114         bool
 115         default y
 116
 117 config RWSEM_XCHGADD_ALGORITHM
 118         bool
 119
 120 config ARCH_HAS_ILOG2_U32
 121         bool
 122         default n
 123
 124 config ARCH_HAS_ILOG2_U64
 125         bool
 126         default n
 127
 128 config GENERIC_HWEIGHT
 129         bool
 130         default y
 131
 132 config GENERIC_CALIBRATE_DELAY
 133         bool
 134         default y
 135
 136 config ARCH_SUPPORTS_AOUT
 137         def_bool y
 138
 139 config ARCH_MAY_HAVE_PC_FDC
 140         bool
 141
 142 config ZONE_DMA
 143         bool
 144         default y
 145
 146 config GENERIC_ISA_DMA
 147         bool
 148
 149 config FIQ
 150         bool
 151
 152 config ARCH_MTD_XIP
 153         bool
 154
 155 if OPROFILE
 156
 157 config OPROFILE_ARMV6
 158         def_bool y
 159         depends on CPU_V6 && !SMP
 160         select OPROFILE_ARM11_CORE
 161
 162 config OPROFILE_MPCORE
 163         def_bool y
 164         depends on CPU_V6 && SMP
 165         select OPROFILE_ARM11_CORE
 166
 167 config OPROFILE_ARM11_CORE
 168         bool
 169
 170 endif
 171
 172 config VECTORS_BASE
 173         hex
 174         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 175         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 176         default 0x00000000
 177         help
 178           The base address of exception vectors.
 179
 180 source "init/Kconfig"
 181
 182 menu "System Type"
 183
 184 choice
 185         prompt "ARM system type"
 186         default ARCH_VERSATILE
 187
 188 config ARCH_AAEC2000
 189         bool "Agilent AAEC-2000 based"
 190         select ARM_AMBA
 191         help
 192           This enables support for systems based on the Agilent AAEC-2000
 193
 194 config ARCH_INTEGRATOR
 195         bool "ARM Ltd. Integrator family"
 196         select ARM_AMBA
 197         select ICST525
 198         help
 199           Support for ARM's Integrator platform.
 200
 201 config ARCH_REALVIEW
 202         bool "ARM Ltd. RealView family"
 203         select ARM_AMBA
 204         select ICST307
 205         select GENERIC_TIME
 206         select GENERIC_CLOCKEVENTS
 207         help
 208           This enables support for ARM Ltd RealView boards.
 209
 210 config ARCH_VERSATILE
 211         bool "ARM Ltd. Versatile family"
 212         select ARM_AMBA
 213         select ARM_VIC
 214         select ICST307
 215         select GENERIC_TIME
 216         select GENERIC_CLOCKEVENTS
 217         help
 218           This enables support for ARM Ltd Versatile board.
 219
 220 config ARCH_AT91
 221         bool "Atmel AT91"
 222         select GENERIC_GPIO
 223         help
 224           This enables support for systems based on the Atmel AT91RM9200,
 225           AT91SAM9 and AT91CAP9 processors.
 226
 227 config ARCH_CLPS7500
 228         bool "Cirrus CL-PS7500FE"
 229         select TIMER_ACORN
 230         select ISA
 231         select NO_IOPORT
 232         help
 233           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 234
 235 config ARCH_CLPS711X
 236         bool "Cirrus Logic CLPS711x/EP721x-based"
 237         help
 238           Support for Cirrus Logic 711x/721x based boards.
 239
 240 config ARCH_CO285
 241         bool "Co-EBSA285"
 242         select FOOTBRIDGE
 243         select FOOTBRIDGE_ADDIN
 244         help
 245           Support for Intel's EBSA285 companion chip.
 246
 247 config ARCH_EBSA110
 248         bool "EBSA-110"
 249         select ISA
 250         select NO_IOPORT
 251         help
 252           This is an evaluation board for the StrongARM processor available
 253           from Digital. It has limited hardware on-board, including an
 254           Ethernet interface, two PCMCIA sockets, two serial ports and a
 255           parallel port.
 256
 257 config ARCH_EP93XX
 258         bool "EP93xx-based"
 259         select ARM_AMBA
 260         select ARM_VIC
 261         select GENERIC_GPIO
 262         select HAVE_GPIO_LIB
 263         help
 264           This enables support for the Cirrus EP93xx series of CPUs.
 265
 266 config ARCH_FOOTBRIDGE
 267         bool "FootBridge"
 268         select FOOTBRIDGE
 269         help
 270           Support for systems based on the DC21285 companion chip
 271           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 272
 273 config ARCH_NETX
 274         bool "Hilscher NetX based"
 275         select ARM_VIC
 276         help
 277           This enables support for systems based on the Hilscher NetX Soc
 278
 279 config ARCH_H720X
 280         bool "Hynix HMS720x-based"
 281         select ISA_DMA_API
 282         help
 283           This enables support for systems based on the Hynix HMS720x
 284
 285 config ARCH_IMX
 286         bool "IMX"
 287         select GENERIC_GPIO
 288         select GENERIC_TIME
 289         select GENERIC_CLOCKEVENTS
 290         help
 291           Support for Motorola's i.MX family of processors (MX1, MXL).
 292
 293 config ARCH_IOP13XX
 294         bool "IOP13xx-based"
 295         depends on MMU
 296         select PLAT_IOP
 297         select PCI
 298         select ARCH_SUPPORTS_MSI
 299         help
 300           Support for Intel's IOP13XX (XScale) family of processors.
 301
 302 config ARCH_IOP32X
 303         bool "IOP32x-based"
 304         depends on MMU
 305         select PLAT_IOP
 306         select PCI
 307         help
 308           Support for Intel's 80219 and IOP32X (XScale) family of
 309           processors.
 310
 311 config ARCH_IOP33X
 312         bool "IOP33x-based"
 313         depends on MMU
 314         select PLAT_IOP
 315         select PCI
 316         help
 317           Support for Intel's IOP33X (XScale) family of processors.
 318
 319 config ARCH_IXP23XX
 320         bool "IXP23XX-based"
 321         depends on MMU
 322         select PCI
 323         help
 324           Support for Intel's IXP23xx (XScale) family of processors.
 325
 326 config ARCH_IXP2000
 327         bool "IXP2400/2800-based"
 328         depends on MMU
 329         select PCI
 330         help
 331           Support for Intel's IXP2400/2800 (XScale) family of processors.
 332
 333 config ARCH_IXP4XX
 334         bool "IXP4xx-based"
 335         depends on MMU
 336         select GENERIC_GPIO
 337         select GENERIC_TIME
 338         select GENERIC_CLOCKEVENTS
 339         help
 340           Support for Intel's IXP4XX (XScale) family of processors.
 341
 342 config ARCH_L7200
 343         bool "LinkUp-L7200"
 344         select FIQ
 345         help
 346           Say Y here if you intend to run this kernel on a LinkUp Systems
 347           L7200 Software Development Board which uses an ARM720T processor.
 348           Information on this board can be obtained at:
 349
 350           <http://www.linkupsys.com/>
 351
 352           If you have any questions or comments about the Linux kernel port
 353           to this board, send e-mail to <sjhill@cotw.com>.
 354
 355 config ARCH_KIRKWOOD
 356         bool "Marvell Kirkwood"
 357         select PCI
 358         select GENERIC_TIME
 359         select GENERIC_CLOCKEVENTS
 360         select PLAT_ORION
 361         help
 362           Support for the following Marvell Kirkwood series SoCs:
 363           88F6180, 88F6192 and 88F6281.
 364
 365 config ARCH_KS8695
 366         bool "Micrel/Kendin KS8695"
 367         select GENERIC_GPIO
 368         help
 369           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 370           System-on-Chip devices.
 371
 372 config ARCH_NS9XXX
 373         bool "NetSilicon NS9xxx"
 374         select GENERIC_GPIO
 375         select GENERIC_TIME
 376         select GENERIC_CLOCKEVENTS
 377         help
 378           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 379           System.
 380
 381           <http://www.digi.com/products/microprocessors/index.jsp>
 382
 383 config ARCH_LOKI
 384         bool "Marvell Loki (88RC8480)"
 385         select GENERIC_TIME
 386         select GENERIC_CLOCKEVENTS
 387         select PLAT_ORION
 388         help
 389           Support for the Marvell Loki (88RC8480) SoC.
 390
 391 config ARCH_MV78XX0
 392         bool "Marvell MV78xx0"
 393         select PCI
 394         select GENERIC_TIME
 395         select GENERIC_CLOCKEVENTS
 396         select PLAT_ORION
 397         help
 398           Support for the following Marvell MV78xx0 series SoCs:
 399           MV781x0, MV782x0.
 400
 401 config ARCH_MXC
 402         bool "Freescale MXC/iMX-based"
 403         select ARCH_MTD_XIP
 404         help
 405           Support for Freescale MXC/iMX-based family of processors
 406
 407 config ARCH_ORION5X
 408         bool "Marvell Orion"
 409         depends on MMU
 410         select PCI
 411         select GENERIC_GPIO
 412         select GENERIC_TIME
 413         select GENERIC_CLOCKEVENTS
 414         select PLAT_ORION
 415         help
 416           Support for the following Marvell Orion 5x series SoCs:
 417           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 418           Orion-2 (5281).
 419
 420 config ARCH_PNX4008
 421         bool "Philips Nexperia PNX4008 Mobile"
 422         help
 423           This enables support for Philips PNX4008 mobile platform.
 424
 425 config ARCH_PXA
 426         bool "PXA2xx/PXA3xx-based"
 427         depends on MMU
 428         select ARCH_MTD_XIP
 429         select GENERIC_GPIO
 430         select HAVE_GPIO_LIB
 431         select GENERIC_TIME
 432         select GENERIC_CLOCKEVENTS
 433         select TICK_ONESHOT
 434         help
 435           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 436
 437 config ARCH_RPC
 438         bool "RiscPC"
 439         select ARCH_ACORN
 440         select FIQ
 441         select TIMER_ACORN
 442         select ARCH_MAY_HAVE_PC_FDC
 443         select ISA_DMA_API
 444         select NO_IOPORT
 445         help
 446           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 447           CD-ROM interface, serial and parallel port, and the floppy drive.
 448
 449 config ARCH_SA1100
 450         bool "SA1100-based"
 451         select ISA
 452         select ARCH_DISCONTIGMEM_ENABLE
 453         select ARCH_SPARSEMEM_ENABLE
 454         select ARCH_SELECT_MEMORY_MODEL
 455         select ARCH_MTD_XIP
 456         select GENERIC_GPIO
 457         select GENERIC_TIME
 458         select GENERIC_CLOCKEVENTS
 459         select TICK_ONESHOT
 460         select HAVE_GPIO_LIB
 461         help
 462           Support for StrongARM 11x0 based boards.
 463
 464 config ARCH_S3C2410
 465         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 466         select GENERIC_GPIO
 467         help
 468           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 469           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 470           the Samsung SMDK2410 development board (and derivatives).
 471
 472 config ARCH_SHARK
 473         bool "Shark"
 474         select ISA
 475         select ISA_DMA
 476         select PCI
 477         help
 478           Support for the StrongARM based Digital DNARD machine, also known
 479           as "Shark" (<http://www.shark-linux.de/shark.html>).
 480
 481 config ARCH_LH7A40X
 482         bool "Sharp LH7A40X"
 483         help
 484           Say Y here for systems based on one of the Sharp LH7A40X
 485           System on a Chip processors.  These CPUs include an ARM922T
 486           core with a wide array of integrated devices for
 487           hand-held and low-power applications.
 488
 489 config ARCH_DAVINCI
 490         bool "TI DaVinci"
 491         select GENERIC_TIME
 492         select GENERIC_CLOCKEVENTS
 493         select GENERIC_GPIO
 494         help
 495           Support for TI's DaVinci platform.
 496
 497 config ARCH_OMAP
 498         bool "TI OMAP"
 499         select GENERIC_GPIO
 500         select HAVE_GPIO_LIB
 501         select GENERIC_TIME
 502         select GENERIC_CLOCKEVENTS
 503         help
 504           Support for TI's OMAP platform (OMAP1 and OMAP2).
 505
 506 config ARCH_MSM7X00A
 507         bool "Qualcomm MSM7X00A"
 508         select GENERIC_TIME
 509         select GENERIC_CLOCKEVENTS
 510         help
 511           Support for Qualcomm MSM7X00A based systems.  This runs on the ARM11
 512           apps processor of the MSM7X00A and depends on a shared memory
 513           interface to the ARM9 modem processor which runs the baseband stack
 514           and controls some vital subsystems (clock and power control, etc).
 515           <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
 516
 517 endchoice
 518
 519 source "arch/arm/mach-clps711x/Kconfig"
 520
 521 source "arch/arm/mach-ep93xx/Kconfig"
 522
 523 source "arch/arm/mach-footbridge/Kconfig"
 524
 525 source "arch/arm/mach-integrator/Kconfig"
 526
 527 source "arch/arm/mach-iop32x/Kconfig"
 528
 529 source "arch/arm/mach-iop33x/Kconfig"
 530
 531 source "arch/arm/mach-iop13xx/Kconfig"
 532
 533 source "arch/arm/mach-ixp4xx/Kconfig"
 534
 535 source "arch/arm/mach-ixp2000/Kconfig"
 536
 537 source "arch/arm/mach-ixp23xx/Kconfig"
 538
 539 source "arch/arm/mach-loki/Kconfig"
 540
 541 source "arch/arm/mach-mv78xx0/Kconfig"
 542
 543 source "arch/arm/mach-pxa/Kconfig"
 544
 545 source "arch/arm/mach-sa1100/Kconfig"
 546
 547 source "arch/arm/plat-omap/Kconfig"
 548
 549 source "arch/arm/mach-omap1/Kconfig"
 550
 551 source "arch/arm/mach-omap2/Kconfig"
 552
 553 source "arch/arm/mach-orion5x/Kconfig"
 554
 555 source "arch/arm/mach-kirkwood/Kconfig"
 556
 557 source "arch/arm/plat-s3c24xx/Kconfig"
 558 source "arch/arm/plat-s3c/Kconfig"
 559
 560 if ARCH_S3C2410
 561 source "arch/arm/mach-s3c2400/Kconfig"
 562 source "arch/arm/mach-s3c2410/Kconfig"
 563 source "arch/arm/mach-s3c2412/Kconfig"
 564 source "arch/arm/mach-s3c2440/Kconfig"
 565 source "arch/arm/mach-s3c2442/Kconfig"
 566 source "arch/arm/mach-s3c2443/Kconfig"
 567 endif
 568
 569 source "arch/arm/mach-lh7a40x/Kconfig"
 570
 571 source "arch/arm/mach-imx/Kconfig"
 572
 573 source "arch/arm/mach-h720x/Kconfig"
 574
 575 source "arch/arm/mach-versatile/Kconfig"
 576
 577 source "arch/arm/mach-aaec2000/Kconfig"
 578
 579 source "arch/arm/mach-realview/Kconfig"
 580
 581 source "arch/arm/mach-at91/Kconfig"
 582
 583 source "arch/arm/plat-mxc/Kconfig"
 584
 585 source "arch/arm/mach-netx/Kconfig"
 586
 587 source "arch/arm/mach-ns9xxx/Kconfig"
 588
 589 source "arch/arm/mach-davinci/Kconfig"
 590
 591 source "arch/arm/mach-ks8695/Kconfig"
 592
 593 source "arch/arm/mach-msm/Kconfig"
 594
 595 # Definitions to make life easier
 596 config ARCH_ACORN
 597         bool
 598
 599 config PLAT_IOP
 600         bool
 601
 602 config PLAT_ORION
 603         bool
 604
 605 source arch/arm/mm/Kconfig
 606
 607 config IWMMXT
 608         bool "Enable iWMMXt support"
 609         depends on CPU_XSCALE || CPU_XSC3
 610         default y if PXA27x || PXA3xx
 611         help
 612           Enable support for iWMMXt context switching at run time if
 613           running on a CPU that supports it.
 614
 615 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 616 config XSCALE_PMU
 617         bool
 618         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 619         default y
 620
 621 if !MMU
 622 source "arch/arm/Kconfig-nommu"
 623 endif
 624
 625 endmenu
 626
 627 source "arch/arm/common/Kconfig"
 628
 629 config FORCE_MAX_ZONEORDER
 630         int
 631         depends on SA1111
 632         default "9"
 633
 634 menu "Bus support"
 635
 636 config ARM_AMBA
 637         bool
 638
 639 config ISA
 640         bool
 641         help
 642           Find out whether you have ISA slots on your motherboard.  ISA is the
 643           name of a bus system, i.e. the way the CPU talks to the other stuff
 644           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 645           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 646           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 647
 648 # Select ISA DMA controller support
 649 config ISA_DMA
 650         bool
 651         select ISA_DMA_API
 652
 653 # Select ISA DMA interface
 654 config ISA_DMA_API
 655         bool
 656
 657 config PCI
 658         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 659         help
 660           Find out whether you have a PCI motherboard. PCI is the name of a
 661           bus system, i.e. the way the CPU talks to the other stuff inside
 662           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 663           VESA. If you have PCI, say Y, otherwise N.
 664
 665 config PCI_SYSCALL
 666         def_bool PCI
 667
 668 # Select the host bridge type
 669 config PCI_HOST_VIA82C505
 670         bool
 671         depends on PCI && ARCH_SHARK
 672         default y
 673
 674 config PCI_HOST_ITE8152
 675         bool
 676         depends on PCI && MACH_ARMCORE
 677         default y
 678         select DMABOUNCE
 679
 680 source "drivers/pci/Kconfig"
 681
 682 source "drivers/pcmcia/Kconfig"
 683
 684 endmenu
 685
 686 menu "Kernel Features"
 687
 688 source "kernel/time/Kconfig"
 689
 690 config SMP
 691         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 692         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 693         help
 694           This enables support for systems with more than one CPU. If you have
 695           a system with only one CPU, like most personal computers, say N. If
 696           you have a system with more than one CPU, say Y.
 697
 698           If you say N here, the kernel will run on single and multiprocessor
 699           machines, but will use only one CPU of a multiprocessor machine. If
 700           you say Y here, the kernel will run on many, but not all, single
 701           processor machines. On a single processor machine, the kernel will
 702           run faster if you say N here.
 703
 704           See also <file:Documentation/i386/IO-APIC.txt>,
 705           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 706           <http://www.linuxdoc.org/docs.html#howto>.
 707
 708           If you don't know what to do here, say N.
 709
 710 config NR_CPUS
 711         int "Maximum number of CPUs (2-32)"
 712         range 2 32
 713         depends on SMP
 714         default "4"
 715
 716 config HOTPLUG_CPU
 717         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 718         depends on SMP && HOTPLUG && EXPERIMENTAL
 719         help
 720           Say Y here to experiment with turning CPUs off and on.  CPUs
 721           can be controlled through /sys/devices/system/cpu.
 722
 723 config LOCAL_TIMERS
 724         bool "Use local timer interrupts"
 725         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 726         default y
 727         help
 728           Enable support for local timers on SMP platforms, rather then the
 729           legacy IPI broadcast method.  Local timers allows the system
 730           accounting to be spread across the timer interval, preventing a
 731           "thundering herd" at every timer tick.
 732
 733 config PREEMPT
 734         bool "Preemptible Kernel (EXPERIMENTAL)"
 735         depends on EXPERIMENTAL
 736         help
 737           This option reduces the latency of the kernel when reacting to
 738           real-time or interactive events by allowing a low priority process to
 739           be preempted even if it is in kernel mode executing a system call.
 740           This allows applications to run more reliably even when the system is
 741           under load.
 742
 743           Say Y here if you are building a kernel for a desktop, embedded
 744           or real-time system.  Say N if you are unsure.
 745
 746 config NO_IDLE_HZ
 747         bool "Dynamic tick timer"
 748         depends on !GENERIC_CLOCKEVENTS
 749         help
 750           Select this option if you want to disable continuous timer ticks
 751           and have them programmed to occur as required. This option saves
 752           power as the system can remain in idle state for longer.
 753
 754           By default dynamic tick is disabled during the boot, and can be
 755           manually enabled with:
 756
 757             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 758
 759           Alternatively, if you want dynamic tick automatically enabled
 760           during boot, pass "dyntick=enable" via the kernel command string.
 761
 762           Please note that dynamic tick may affect the accuracy of
 763           timekeeping on some platforms depending on the implementation.
 764           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 765           to have accurate timekeeping with dynamic tick.
 766
 767 config HZ
 768         int
 769         default 128 if ARCH_L7200
 770         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 771         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 772         default AT91_TIMER_HZ if ARCH_AT91
 773         default 100
 774
 775 config AEABI
 776         bool "Use the ARM EABI to compile the kernel"
 777         help
 778           This option allows for the kernel to be compiled using the latest
 779           ARM ABI (aka EABI).  This is only useful if you are using a user
 780           space environment that is also compiled with EABI.
 781
 782           Since there are major incompatibilities between the legacy ABI and
 783           EABI, especially with regard to structure member alignment, this
 784           option also changes the kernel syscall calling convention to
 785           disambiguate both ABIs and allow for backward compatibility support
 786           (selected with CONFIG_OABI_COMPAT).
 787
 788           To use this you need GCC version 4.0.0 or later.
 789
 790 config OABI_COMPAT
 791         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 792         depends on AEABI && EXPERIMENTAL
 793         default y
 794         help
 795           This option preserves the old syscall interface along with the
 796           new (ARM EABI) one. It also provides a compatibility layer to
 797           intercept syscalls that have structure arguments which layout
 798           in memory differs between the legacy ABI and the new ARM EABI
 799           (only for non "thumb" binaries). This option adds a tiny
 800           overhead to all syscalls and produces a slightly larger kernel.
 801           If you know you'll be using only pure EABI user space then you
 802           can say N here. If this option is not selected and you attempt
 803           to execute a legacy ABI binary then the result will be
 804           UNPREDICTABLE (in fact it can be predicted that it won't work
 805           at all). If in doubt say Y.
 806
 807 config ARCH_DISCONTIGMEM_ENABLE
 808         bool
 809         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 810         help
 811           Say Y to support efficient handling of discontiguous physical memory,
 812           for architectures which are either NUMA (Non-Uniform Memory Access)
 813           or have huge holes in the physical address space for other reasons.
 814           See <file:Documentation/vm/numa> for more.
 815
 816 config ARCH_SPARSEMEM_ENABLE
 817         bool
 818
 819 config ARCH_SELECT_MEMORY_MODEL
 820         bool
 821
 822 config NODES_SHIFT
 823         int
 824         default "4" if ARCH_LH7A40X
 825         default "2"
 826         depends on NEED_MULTIPLE_NODES
 827
 828 source "mm/Kconfig"
 829
 830 config LEDS
 831         bool "Timer and CPU usage LEDs"
 832         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 833                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 834                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 835                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 836                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 837                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 838                    ARCH_KS8695 || MACH_RD88F5182
 839         help
 840           If you say Y here, the LEDs on your machine will be used
 841           to provide useful information about your current system status.
 842
 843           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 844           be able to select which LEDs are active using the options below. If
 845           you are compiling a kernel for the EBSA-110 or the LART however, the
 846           red LED will simply flash regularly to indicate that the system is
 847           still functional. It is safe to say Y here if you have a CATS
 848           system, but the driver will do nothing.
 849
 850 config LEDS_TIMER
 851         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 852                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 853                             || MACH_OMAP_PERSEUS2
 854         depends on LEDS
 855         depends on !GENERIC_CLOCKEVENTS
 856         default y if ARCH_EBSA110
 857         help
 858           If you say Y here, one of the system LEDs (the green one on the
 859           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 860           will flash regularly to indicate that the system is still
 861           operational. This is mainly useful to kernel hackers who are
 862           debugging unstable kernels.
 863
 864           The LART uses the same LED for both Timer LED and CPU usage LED
 865           functions. You may choose to use both, but the Timer LED function
 866           will overrule the CPU usage LED.
 867
 868 config LEDS_CPU
 869         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 870                         !ARCH_OMAP) \
 871                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 872                         || MACH_OMAP_PERSEUS2
 873         depends on LEDS
 874         help
 875           If you say Y here, the red LED will be used to give a good real
 876           time indication of CPU usage, by lighting whenever the idle task
 877           is not currently executing.
 878
 879           The LART uses the same LED for both Timer LED and CPU usage LED
 880           functions. You may choose to use both, but the Timer LED function
 881           will overrule the CPU usage LED.
 882
 883 config ALIGNMENT_TRAP
 884         bool
 885         depends on CPU_CP15_MMU
 886         default y if !ARCH_EBSA110
 887         help
 888           ARM processors cannot fetch/store information which is not
 889           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 890           address divisible by 4. On 32-bit ARM processors, these non-aligned
 891           fetch/store instructions will be emulated in software if you say
 892           here, which has a severe performance impact. This is necessary for
 893           correct operation of some network protocols. With an IP-only
 894           configuration it is safe to say N, otherwise say Y.
 895
 896 endmenu
 897
 898 menu "Boot options"
 899
 900 # Compressed boot loader in ROM.  Yes, we really want to ask about
 901 # TEXT and BSS so we preserve their values in the config files.
 902 config ZBOOT_ROM_TEXT
 903         hex "Compressed ROM boot loader base address"
 904         default "0"
 905         help
 906           The physical address at which the ROM-able zImage is to be
 907           placed in the target.  Platforms which normally make use of
 908           ROM-able zImage formats normally set this to a suitable
 909           value in their defconfig file.
 910
 911           If ZBOOT_ROM is not enabled, this has no effect.
 912
 913 config ZBOOT_ROM_BSS
 914         hex "Compressed ROM boot loader BSS address"
 915         default "0"
 916         help
 917           The base address of an area of read/write memory in the target
 918           for the ROM-able zImage which must be available while the
 919           decompressor is running. It must be large enough to hold the
 920           entire decompressed kernel plus an additional 128 KiB.
 921           Platforms which normally make use of ROM-able zImage formats
 922           normally set this to a suitable value in their defconfig file.
 923
 924           If ZBOOT_ROM is not enabled, this has no effect.
 925
 926 config ZBOOT_ROM
 927         bool "Compressed boot loader in ROM/flash"
 928         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 929         help
 930           Say Y here if you intend to execute your compressed kernel image
 931           (zImage) directly from ROM or flash.  If unsure, say N.
 932
 933 config CMDLINE
 934         string "Default kernel command string"
 935         default ""
 936         help
 937           On some architectures (EBSA110 and CATS), there is currently no way
 938           for the boot loader to pass arguments to the kernel. For these
 939           architectures, you should supply some command-line options at build
 940           time by entering them here. As a minimum, you should specify the
 941           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 942
 943 config XIP_KERNEL
 944         bool "Kernel Execute-In-Place from ROM"
 945         depends on !ZBOOT_ROM
 946         help
 947           Execute-In-Place allows the kernel to run from non-volatile storage
 948           directly addressable by the CPU, such as NOR flash. This saves RAM
 949           space since the text section of the kernel is not loaded from flash
 950           to RAM.  Read-write sections, such as the data section and stack,
 951           are still copied to RAM.  The XIP kernel is not compressed since
 952           it has to run directly from flash, so it will take more space to
 953           store it.  The flash address used to link the kernel object files,
 954           and for storing it, is configuration dependent. Therefore, if you
 955           say Y here, you must know the proper physical address where to
 956           store the kernel image depending on your own flash memory usage.
 957
 958           Also note that the make target becomes "make xipImage" rather than
 959           "make zImage" or "make Image".  The final kernel binary to put in
 960           ROM memory will be arch/arm/boot/xipImage.
 961
 962           If unsure, say N.
 963
 964 config XIP_PHYS_ADDR
 965         hex "XIP Kernel Physical Location"
 966         depends on XIP_KERNEL
 967         default "0x00080000"
 968         help
 969           This is the physical address in your flash memory the kernel will
 970           be linked for and stored to.  This address is dependent on your
 971           own flash usage.
 972
 973 config KEXEC
 974         bool "Kexec system call (EXPERIMENTAL)"
 975         depends on EXPERIMENTAL
 976         help
 977           kexec is a system call that implements the ability to shutdown your
 978           current kernel, and to start another kernel.  It is like a reboot
 979           but it is independent of the system firmware.   And like a reboot
 980           you can start any kernel with it, not just Linux.
 981
 982           It is an ongoing process to be certain the hardware in a machine
 983           is properly shutdown, so do not be surprised if this code does not
 984           initially work for you.  It may help to enable device hotplugging
 985           support.
 986
 987 config ATAGS_PROC
 988         bool "Export atags in procfs"
 989         depends on KEXEC
 990         default y
 991         help
 992           Should the atags used to boot the kernel be exported in an "atags"
 993           file in procfs. Useful with kexec.
 994
 995 endmenu
 996
 997 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
 998
 999 menu "CPU Frequency scaling"
1000
1001 source "drivers/cpufreq/Kconfig"
1002
1003 config CPU_FREQ_SA1100
1004         bool
1005         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1006         default y
1007
1008 config CPU_FREQ_SA1110
1009         bool
1010         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1011         default y
1012
1013 config CPU_FREQ_INTEGRATOR
1014         tristate "CPUfreq driver for ARM Integrator CPUs"
1015         depends on ARCH_INTEGRATOR && CPU_FREQ
1016         default y
1017         help
1018           This enables the CPUfreq driver for ARM Integrator CPUs.
1019
1020           For details, take a look at <file:Documentation/cpu-freq>.
1021
1022           If in doubt, say Y.
1023
1024 config CPU_FREQ_IMX
1025         tristate "CPUfreq driver for i.MX CPUs"
1026         depends on ARCH_IMX && CPU_FREQ
1027         default n
1028         help
1029           This enables the CPUfreq driver for i.MX CPUs.
1030
1031           If in doubt, say N.
1032
1033 config CPU_FREQ_PXA
1034         bool
1035         depends on CPU_FREQ && ARCH_PXA && PXA25x
1036         default y
1037         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1038
1039 endmenu
1040
1041 endif
1042
1043 menu "Floating point emulation"
1044
1045 comment "At least one emulation must be selected"
1046
1047 config FPE_NWFPE
1048         bool "NWFPE math emulation"
1049         depends on !AEABI || OABI_COMPAT
1050         ---help---
1051           Say Y to include the NWFPE floating point emulator in the kernel.
1052           This is necessary to run most binaries. Linux does not currently
1053           support floating point hardware so you need to say Y here even if
1054           your machine has an FPA or floating point co-processor podule.
1055
1056           You may say N here if you are going to load the Acorn FPEmulator
1057           early in the bootup.
1058
1059 config FPE_NWFPE_XP
1060         bool "Support extended precision"
1061         depends on FPE_NWFPE
1062         help
1063           Say Y to include 80-bit support in the kernel floating-point
1064           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1065           Note that gcc does not generate 80-bit operations by default,
1066           so in most cases this option only enlarges the size of the
1067           floating point emulator without any good reason.
1068
1069           You almost surely want to say N here.
1070
1071 config FPE_FASTFPE
1072         bool "FastFPE math emulation (EXPERIMENTAL)"
1073         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1074         ---help---
1075           Say Y here to include the FAST floating point emulator in the kernel.
1076           This is an experimental much faster emulator which now also has full
1077           precision for the mantissa.  It does not support any exceptions.
1078           It is very simple, and approximately 3-6 times faster than NWFPE.
1079
1080           It should be sufficient for most programs.  It may be not suitable
1081           for scientific calculations, but you have to check this for yourself.
1082           If you do not feel you need a faster FP emulation you should better
1083           choose NWFPE.
1084
1085 config VFP
1086         bool "VFP-format floating point maths"
1087         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1088         help
1089           Say Y to include VFP support code in the kernel. This is needed
1090           if your hardware includes a VFP unit.
1091
1092           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1093           release notes and additional status information.
1094
1095           Say N if your target does not have VFP hardware.
1096
1097 config VFPv3
1098         bool
1099         depends on VFP
1100         default y if CPU_V7
1101
1102 config NEON
1103         bool "Advanced SIMD (NEON) Extension support"
1104         depends on VFPv3 && CPU_V7
1105         help
1106           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1107           Extension.
1108
1109 endmenu
1110
1111 menu "Userspace binary formats"
1112
1113 source "fs/Kconfig.binfmt"
1114
1115 config ARTHUR
1116         tristate "RISC OS personality"
1117         depends on !AEABI
1118         help
1119           Say Y here to include the kernel code necessary if you want to run
1120           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1121           experimental; if this sounds frightening, say N and sleep in peace.
1122           You can also say M here to compile this support as a module (which
1123           will be called arthur).
1124
1125 endmenu
1126
1127 menu "Power management options"
1128
1129 source "kernel/power/Kconfig"
1130
1131 config ARCH_SUSPEND_POSSIBLE
1132         def_bool y
1133
1134 endmenu
1135
1136 source "net/Kconfig"
1137
1138 menu "Device Drivers"
1139
1140 source "drivers/base/Kconfig"
1141
1142 source "drivers/connector/Kconfig"
1143
1144 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1145 source "drivers/mtd/Kconfig"
1146 endif
1147
1148 source "drivers/parport/Kconfig"
1149
1150 source "drivers/pnp/Kconfig"
1151
1152 source "drivers/block/Kconfig"
1153
1154 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1155
1156 source "drivers/misc/Kconfig"
1157
1158 source "drivers/ide/Kconfig"
1159
1160 source "drivers/scsi/Kconfig"
1161
1162 source "drivers/ata/Kconfig"
1163
1164 source "drivers/md/Kconfig"
1165
1166 source "drivers/message/fusion/Kconfig"
1167
1168 source "drivers/ieee1394/Kconfig"
1169
1170 source "drivers/message/i2o/Kconfig"
1171
1172 source "drivers/net/Kconfig"
1173
1174 source "drivers/isdn/Kconfig"
1175
1176 # input before char - char/joystick depends on it. As does USB.
1177
1178 source "drivers/input/Kconfig"
1179
1180 source "drivers/char/Kconfig"
1181
1182 source "drivers/i2c/Kconfig"
1183
1184 source "drivers/spi/Kconfig"
1185
1186 source "drivers/gpio/Kconfig"
1187
1188 source "drivers/w1/Kconfig"
1189
1190 source "drivers/power/Kconfig"
1191
1192 source "drivers/hwmon/Kconfig"
1193
1194 source "drivers/watchdog/Kconfig"
1195
1196 source "drivers/ssb/Kconfig"
1197
1198 #source "drivers/l3/Kconfig"
1199
1200 source "drivers/mfd/Kconfig"
1201
1202 source "drivers/media/Kconfig"
1203
1204 source "drivers/video/Kconfig"
1205
1206 source "sound/Kconfig"
1207
1208 source "drivers/hid/Kconfig"
1209
1210 source "drivers/usb/Kconfig"
1211
1212 source "drivers/mmc/Kconfig"
1213
1214 source "drivers/leds/Kconfig"
1215
1216 source "drivers/rtc/Kconfig"
1217
1218 source "drivers/dma/Kconfig"
1219
1220 source "drivers/dca/Kconfig"
1221
1222 source "drivers/uio/Kconfig"
1223
1224 endmenu
1225
1226 source "fs/Kconfig"
1227
1228 source "arch/arm/Kconfig.debug"
1229
1230 source "security/Kconfig"
1231
1232 source "crypto/Kconfig"
1233
1234 source "lib/Kconfig"