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_KS8695
 356         bool "Micrel/Kendin KS8695"
 357         select GENERIC_GPIO
 358         help
 359           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 360           System-on-Chip devices.
 361
 362 config ARCH_NS9XXX
 363         bool "NetSilicon NS9xxx"
 364         select GENERIC_GPIO
 365         select GENERIC_TIME
 366         select GENERIC_CLOCKEVENTS
 367         help
 368           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 369           System.
 370
 371           <http://www.digi.com/products/microprocessors/index.jsp>
 372
 373 config ARCH_MXC
 374         bool "Freescale MXC/iMX-based"
 375         select ARCH_MTD_XIP
 376         help
 377           Support for Freescale MXC/iMX-based family of processors
 378
 379 config ARCH_ORION5X
 380         bool "Marvell Orion"
 381         depends on MMU
 382         select PCI
 383         select GENERIC_GPIO
 384         select GENERIC_TIME
 385         select GENERIC_CLOCKEVENTS
 386         select PLAT_ORION
 387         help
 388           Support for the following Marvell Orion 5x series SoCs:
 389           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 390           Orion-2 (5281).
 391
 392 config ARCH_PNX4008
 393         bool "Philips Nexperia PNX4008 Mobile"
 394         help
 395           This enables support for Philips PNX4008 mobile platform.
 396
 397 config ARCH_PXA
 398         bool "PXA2xx/PXA3xx-based"
 399         depends on MMU
 400         select ARCH_MTD_XIP
 401         select GENERIC_GPIO
 402         select HAVE_GPIO_LIB
 403         select GENERIC_TIME
 404         select GENERIC_CLOCKEVENTS
 405         select TICK_ONESHOT
 406         help
 407           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 408
 409 config ARCH_RPC
 410         bool "RiscPC"
 411         select ARCH_ACORN
 412         select FIQ
 413         select TIMER_ACORN
 414         select ARCH_MAY_HAVE_PC_FDC
 415         select ISA_DMA_API
 416         select NO_IOPORT
 417         help
 418           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 419           CD-ROM interface, serial and parallel port, and the floppy drive.
 420
 421 config ARCH_SA1100
 422         bool "SA1100-based"
 423         select ISA
 424         select ARCH_DISCONTIGMEM_ENABLE
 425         select ARCH_SPARSEMEM_ENABLE
 426         select ARCH_SELECT_MEMORY_MODEL
 427         select ARCH_MTD_XIP
 428         select GENERIC_GPIO
 429         select GENERIC_TIME
 430         select GENERIC_CLOCKEVENTS
 431         select TICK_ONESHOT
 432         select HAVE_GPIO_LIB
 433         help
 434           Support for StrongARM 11x0 based boards.
 435
 436 config ARCH_S3C2410
 437         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 438         select GENERIC_GPIO
 439         help
 440           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 441           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 442           the Samsung SMDK2410 development board (and derivatives).
 443
 444 config ARCH_SHARK
 445         bool "Shark"
 446         select ISA
 447         select ISA_DMA
 448         select PCI
 449         help
 450           Support for the StrongARM based Digital DNARD machine, also known
 451           as "Shark" (<http://www.shark-linux.de/shark.html>).
 452
 453 config ARCH_LH7A40X
 454         bool "Sharp LH7A40X"
 455         help
 456           Say Y here for systems based on one of the Sharp LH7A40X
 457           System on a Chip processors.  These CPUs include an ARM922T
 458           core with a wide array of integrated devices for
 459           hand-held and low-power applications.
 460
 461 config ARCH_DAVINCI
 462         bool "TI DaVinci"
 463         select GENERIC_TIME
 464         select GENERIC_CLOCKEVENTS
 465         select GENERIC_GPIO
 466         help
 467           Support for TI's DaVinci platform.
 468
 469 config ARCH_OMAP
 470         bool "TI OMAP"
 471         select GENERIC_GPIO
 472         select HAVE_GPIO_LIB
 473         select GENERIC_TIME
 474         select GENERIC_CLOCKEVENTS
 475         help
 476           Support for TI's OMAP platform (OMAP1 and OMAP2).
 477
 478 config ARCH_MSM7X00A
 479         bool "Qualcomm MSM7X00A"
 480         select GENERIC_TIME
 481         select GENERIC_CLOCKEVENTS
 482         help
 483           Support for Qualcomm MSM7X00A based systems.  This runs on the ARM11
 484           apps processor of the MSM7X00A and depends on a shared memory
 485           interface to the ARM9 modem processor which runs the baseband stack
 486           and controls some vital subsystems (clock and power control, etc).
 487           <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
 488
 489 endchoice
 490
 491 source "arch/arm/mach-clps711x/Kconfig"
 492
 493 source "arch/arm/mach-ep93xx/Kconfig"
 494
 495 source "arch/arm/mach-footbridge/Kconfig"
 496
 497 source "arch/arm/mach-integrator/Kconfig"
 498
 499 source "arch/arm/mach-iop32x/Kconfig"
 500
 501 source "arch/arm/mach-iop33x/Kconfig"
 502
 503 source "arch/arm/mach-iop13xx/Kconfig"
 504
 505 source "arch/arm/mach-ixp4xx/Kconfig"
 506
 507 source "arch/arm/mach-ixp2000/Kconfig"
 508
 509 source "arch/arm/mach-ixp23xx/Kconfig"
 510
 511 source "arch/arm/mach-pxa/Kconfig"
 512
 513 source "arch/arm/mach-sa1100/Kconfig"
 514
 515 source "arch/arm/plat-omap/Kconfig"
 516
 517 source "arch/arm/mach-omap1/Kconfig"
 518
 519 source "arch/arm/mach-omap2/Kconfig"
 520
 521 source "arch/arm/mach-orion5x/Kconfig"
 522
 523 source "arch/arm/plat-s3c24xx/Kconfig"
 524 source "arch/arm/plat-s3c/Kconfig"
 525
 526 if ARCH_S3C2410
 527 source "arch/arm/mach-s3c2400/Kconfig"
 528 source "arch/arm/mach-s3c2410/Kconfig"
 529 source "arch/arm/mach-s3c2412/Kconfig"
 530 source "arch/arm/mach-s3c2440/Kconfig"
 531 source "arch/arm/mach-s3c2442/Kconfig"
 532 source "arch/arm/mach-s3c2443/Kconfig"
 533 endif
 534
 535 source "arch/arm/mach-lh7a40x/Kconfig"
 536
 537 source "arch/arm/mach-imx/Kconfig"
 538
 539 source "arch/arm/mach-h720x/Kconfig"
 540
 541 source "arch/arm/mach-versatile/Kconfig"
 542
 543 source "arch/arm/mach-aaec2000/Kconfig"
 544
 545 source "arch/arm/mach-realview/Kconfig"
 546
 547 source "arch/arm/mach-at91/Kconfig"
 548
 549 source "arch/arm/plat-mxc/Kconfig"
 550
 551 source "arch/arm/mach-netx/Kconfig"
 552
 553 source "arch/arm/mach-ns9xxx/Kconfig"
 554
 555 source "arch/arm/mach-davinci/Kconfig"
 556
 557 source "arch/arm/mach-ks8695/Kconfig"
 558
 559 source "arch/arm/mach-msm/Kconfig"
 560
 561 # Definitions to make life easier
 562 config ARCH_ACORN
 563         bool
 564
 565 config PLAT_IOP
 566         bool
 567
 568 config PLAT_ORION
 569         bool
 570
 571 source arch/arm/mm/Kconfig
 572
 573 config IWMMXT
 574         bool "Enable iWMMXt support"
 575         depends on CPU_XSCALE || CPU_XSC3
 576         default y if PXA27x || PXA3xx
 577         help
 578           Enable support for iWMMXt context switching at run time if
 579           running on a CPU that supports it.
 580
 581 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 582 config XSCALE_PMU
 583         bool
 584         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 585         default y
 586
 587 if !MMU
 588 source "arch/arm/Kconfig-nommu"
 589 endif
 590
 591 endmenu
 592
 593 source "arch/arm/common/Kconfig"
 594
 595 config FORCE_MAX_ZONEORDER
 596         int
 597         depends on SA1111
 598         default "9"
 599
 600 menu "Bus support"
 601
 602 config ARM_AMBA
 603         bool
 604
 605 config ISA
 606         bool
 607         help
 608           Find out whether you have ISA slots on your motherboard.  ISA is the
 609           name of a bus system, i.e. the way the CPU talks to the other stuff
 610           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 611           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 612           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 613
 614 # Select ISA DMA controller support
 615 config ISA_DMA
 616         bool
 617         select ISA_DMA_API
 618
 619 # Select ISA DMA interface
 620 config ISA_DMA_API
 621         bool
 622
 623 config PCI
 624         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 625         help
 626           Find out whether you have a PCI motherboard. PCI is the name of a
 627           bus system, i.e. the way the CPU talks to the other stuff inside
 628           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 629           VESA. If you have PCI, say Y, otherwise N.
 630
 631 config PCI_SYSCALL
 632         def_bool PCI
 633
 634 # Select the host bridge type
 635 config PCI_HOST_VIA82C505
 636         bool
 637         depends on PCI && ARCH_SHARK
 638         default y
 639
 640 config PCI_HOST_ITE8152
 641         bool
 642         depends on PCI && MACH_ARMCORE
 643         default y
 644         select DMABOUNCE
 645
 646 source "drivers/pci/Kconfig"
 647
 648 source "drivers/pcmcia/Kconfig"
 649
 650 endmenu
 651
 652 menu "Kernel Features"
 653
 654 source "kernel/time/Kconfig"
 655
 656 config SMP
 657         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 658         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 659         help
 660           This enables support for systems with more than one CPU. If you have
 661           a system with only one CPU, like most personal computers, say N. If
 662           you have a system with more than one CPU, say Y.
 663
 664           If you say N here, the kernel will run on single and multiprocessor
 665           machines, but will use only one CPU of a multiprocessor machine. If
 666           you say Y here, the kernel will run on many, but not all, single
 667           processor machines. On a single processor machine, the kernel will
 668           run faster if you say N here.
 669
 670           See also <file:Documentation/i386/IO-APIC.txt>,
 671           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 672           <http://www.linuxdoc.org/docs.html#howto>.
 673
 674           If you don't know what to do here, say N.
 675
 676 config NR_CPUS
 677         int "Maximum number of CPUs (2-32)"
 678         range 2 32
 679         depends on SMP
 680         default "4"
 681
 682 config HOTPLUG_CPU
 683         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 684         depends on SMP && HOTPLUG && EXPERIMENTAL
 685         help
 686           Say Y here to experiment with turning CPUs off and on.  CPUs
 687           can be controlled through /sys/devices/system/cpu.
 688
 689 config LOCAL_TIMERS
 690         bool "Use local timer interrupts"
 691         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 692         default y
 693         help
 694           Enable support for local timers on SMP platforms, rather then the
 695           legacy IPI broadcast method.  Local timers allows the system
 696           accounting to be spread across the timer interval, preventing a
 697           "thundering herd" at every timer tick.
 698
 699 config PREEMPT
 700         bool "Preemptible Kernel (EXPERIMENTAL)"
 701         depends on EXPERIMENTAL
 702         help
 703           This option reduces the latency of the kernel when reacting to
 704           real-time or interactive events by allowing a low priority process to
 705           be preempted even if it is in kernel mode executing a system call.
 706           This allows applications to run more reliably even when the system is
 707           under load.
 708
 709           Say Y here if you are building a kernel for a desktop, embedded
 710           or real-time system.  Say N if you are unsure.
 711
 712 config NO_IDLE_HZ
 713         bool "Dynamic tick timer"
 714         depends on !GENERIC_CLOCKEVENTS
 715         help
 716           Select this option if you want to disable continuous timer ticks
 717           and have them programmed to occur as required. This option saves
 718           power as the system can remain in idle state for longer.
 719
 720           By default dynamic tick is disabled during the boot, and can be
 721           manually enabled with:
 722
 723             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 724
 725           Alternatively, if you want dynamic tick automatically enabled
 726           during boot, pass "dyntick=enable" via the kernel command string.
 727
 728           Please note that dynamic tick may affect the accuracy of
 729           timekeeping on some platforms depending on the implementation.
 730           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 731           to have accurate timekeeping with dynamic tick.
 732
 733 config HZ
 734         int
 735         default 128 if ARCH_L7200
 736         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 737         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 738         default AT91_TIMER_HZ if ARCH_AT91
 739         default 100
 740
 741 config AEABI
 742         bool "Use the ARM EABI to compile the kernel"
 743         help
 744           This option allows for the kernel to be compiled using the latest
 745           ARM ABI (aka EABI).  This is only useful if you are using a user
 746           space environment that is also compiled with EABI.
 747
 748           Since there are major incompatibilities between the legacy ABI and
 749           EABI, especially with regard to structure member alignment, this
 750           option also changes the kernel syscall calling convention to
 751           disambiguate both ABIs and allow for backward compatibility support
 752           (selected with CONFIG_OABI_COMPAT).
 753
 754           To use this you need GCC version 4.0.0 or later.
 755
 756 config OABI_COMPAT
 757         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 758         depends on AEABI && EXPERIMENTAL
 759         default y
 760         help
 761           This option preserves the old syscall interface along with the
 762           new (ARM EABI) one. It also provides a compatibility layer to
 763           intercept syscalls that have structure arguments which layout
 764           in memory differs between the legacy ABI and the new ARM EABI
 765           (only for non "thumb" binaries). This option adds a tiny
 766           overhead to all syscalls and produces a slightly larger kernel.
 767           If you know you'll be using only pure EABI user space then you
 768           can say N here. If this option is not selected and you attempt
 769           to execute a legacy ABI binary then the result will be
 770           UNPREDICTABLE (in fact it can be predicted that it won't work
 771           at all). If in doubt say Y.
 772
 773 config ARCH_DISCONTIGMEM_ENABLE
 774         bool
 775         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 776         help
 777           Say Y to support efficient handling of discontiguous physical memory,
 778           for architectures which are either NUMA (Non-Uniform Memory Access)
 779           or have huge holes in the physical address space for other reasons.
 780           See <file:Documentation/vm/numa> for more.
 781
 782 config ARCH_SPARSEMEM_ENABLE
 783         bool
 784
 785 config ARCH_SELECT_MEMORY_MODEL
 786         bool
 787
 788 config NODES_SHIFT
 789         int
 790         default "4" if ARCH_LH7A40X
 791         default "2"
 792         depends on NEED_MULTIPLE_NODES
 793
 794 source "mm/Kconfig"
 795
 796 config LEDS
 797         bool "Timer and CPU usage LEDs"
 798         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 799                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 800                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 801                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 802                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 803                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 804                    ARCH_KS8695 || MACH_RD88F5182
 805         help
 806           If you say Y here, the LEDs on your machine will be used
 807           to provide useful information about your current system status.
 808
 809           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 810           be able to select which LEDs are active using the options below. If
 811           you are compiling a kernel for the EBSA-110 or the LART however, the
 812           red LED will simply flash regularly to indicate that the system is
 813           still functional. It is safe to say Y here if you have a CATS
 814           system, but the driver will do nothing.
 815
 816 config LEDS_TIMER
 817         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 818                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 819                             || MACH_OMAP_PERSEUS2
 820         depends on LEDS
 821         depends on !GENERIC_CLOCKEVENTS
 822         default y if ARCH_EBSA110
 823         help
 824           If you say Y here, one of the system LEDs (the green one on the
 825           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 826           will flash regularly to indicate that the system is still
 827           operational. This is mainly useful to kernel hackers who are
 828           debugging unstable kernels.
 829
 830           The LART uses the same LED for both Timer LED and CPU usage LED
 831           functions. You may choose to use both, but the Timer LED function
 832           will overrule the CPU usage LED.
 833
 834 config LEDS_CPU
 835         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 836                         !ARCH_OMAP) \
 837                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 838                         || MACH_OMAP_PERSEUS2
 839         depends on LEDS
 840         help
 841           If you say Y here, the red LED will be used to give a good real
 842           time indication of CPU usage, by lighting whenever the idle task
 843           is not currently executing.
 844
 845           The LART uses the same LED for both Timer LED and CPU usage LED
 846           functions. You may choose to use both, but the Timer LED function
 847           will overrule the CPU usage LED.
 848
 849 config ALIGNMENT_TRAP
 850         bool
 851         depends on CPU_CP15_MMU
 852         default y if !ARCH_EBSA110
 853         help
 854           ARM processors cannot fetch/store information which is not
 855           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 856           address divisible by 4. On 32-bit ARM processors, these non-aligned
 857           fetch/store instructions will be emulated in software if you say
 858           here, which has a severe performance impact. This is necessary for
 859           correct operation of some network protocols. With an IP-only
 860           configuration it is safe to say N, otherwise say Y.
 861
 862 endmenu
 863
 864 menu "Boot options"
 865
 866 # Compressed boot loader in ROM.  Yes, we really want to ask about
 867 # TEXT and BSS so we preserve their values in the config files.
 868 config ZBOOT_ROM_TEXT
 869         hex "Compressed ROM boot loader base address"
 870         default "0"
 871         help
 872           The physical address at which the ROM-able zImage is to be
 873           placed in the target.  Platforms which normally make use of
 874           ROM-able zImage formats normally set this to a suitable
 875           value in their defconfig file.
 876
 877           If ZBOOT_ROM is not enabled, this has no effect.
 878
 879 config ZBOOT_ROM_BSS
 880         hex "Compressed ROM boot loader BSS address"
 881         default "0"
 882         help
 883           The base address of an area of read/write memory in the target
 884           for the ROM-able zImage which must be available while the
 885           decompressor is running. It must be large enough to hold the
 886           entire decompressed kernel plus an additional 128 KiB.
 887           Platforms which normally make use of ROM-able zImage formats
 888           normally set this to a suitable value in their defconfig file.
 889
 890           If ZBOOT_ROM is not enabled, this has no effect.
 891
 892 config ZBOOT_ROM
 893         bool "Compressed boot loader in ROM/flash"
 894         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 895         help
 896           Say Y here if you intend to execute your compressed kernel image
 897           (zImage) directly from ROM or flash.  If unsure, say N.
 898
 899 config CMDLINE
 900         string "Default kernel command string"
 901         default ""
 902         help
 903           On some architectures (EBSA110 and CATS), there is currently no way
 904           for the boot loader to pass arguments to the kernel. For these
 905           architectures, you should supply some command-line options at build
 906           time by entering them here. As a minimum, you should specify the
 907           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 908
 909 config XIP_KERNEL
 910         bool "Kernel Execute-In-Place from ROM"
 911         depends on !ZBOOT_ROM
 912         help
 913           Execute-In-Place allows the kernel to run from non-volatile storage
 914           directly addressable by the CPU, such as NOR flash. This saves RAM
 915           space since the text section of the kernel is not loaded from flash
 916           to RAM.  Read-write sections, such as the data section and stack,
 917           are still copied to RAM.  The XIP kernel is not compressed since
 918           it has to run directly from flash, so it will take more space to
 919           store it.  The flash address used to link the kernel object files,
 920           and for storing it, is configuration dependent. Therefore, if you
 921           say Y here, you must know the proper physical address where to
 922           store the kernel image depending on your own flash memory usage.
 923
 924           Also note that the make target becomes "make xipImage" rather than
 925           "make zImage" or "make Image".  The final kernel binary to put in
 926           ROM memory will be arch/arm/boot/xipImage.
 927
 928           If unsure, say N.
 929
 930 config XIP_PHYS_ADDR
 931         hex "XIP Kernel Physical Location"
 932         depends on XIP_KERNEL
 933         default "0x00080000"
 934         help
 935           This is the physical address in your flash memory the kernel will
 936           be linked for and stored to.  This address is dependent on your
 937           own flash usage.
 938
 939 config KEXEC
 940         bool "Kexec system call (EXPERIMENTAL)"
 941         depends on EXPERIMENTAL
 942         help
 943           kexec is a system call that implements the ability to shutdown your
 944           current kernel, and to start another kernel.  It is like a reboot
 945           but it is independent of the system firmware.   And like a reboot
 946           you can start any kernel with it, not just Linux.
 947
 948           It is an ongoing process to be certain the hardware in a machine
 949           is properly shutdown, so do not be surprised if this code does not
 950           initially work for you.  It may help to enable device hotplugging
 951           support.
 952
 953 config ATAGS_PROC
 954         bool "Export atags in procfs"
 955         depends on KEXEC
 956         default y
 957         help
 958           Should the atags used to boot the kernel be exported in an "atags"
 959           file in procfs. Useful with kexec.
 960
 961 endmenu
 962
 963 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
 964
 965 menu "CPU Frequency scaling"
 966
 967 source "drivers/cpufreq/Kconfig"
 968
 969 config CPU_FREQ_SA1100
 970         bool
 971         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 972         default y
 973
 974 config CPU_FREQ_SA1110
 975         bool
 976         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 977         default y
 978
 979 config CPU_FREQ_INTEGRATOR
 980         tristate "CPUfreq driver for ARM Integrator CPUs"
 981         depends on ARCH_INTEGRATOR && CPU_FREQ
 982         default y
 983         help
 984           This enables the CPUfreq driver for ARM Integrator CPUs.
 985
 986           For details, take a look at <file:Documentation/cpu-freq>.
 987
 988           If in doubt, say Y.
 989
 990 config CPU_FREQ_IMX
 991         tristate "CPUfreq driver for i.MX CPUs"
 992         depends on ARCH_IMX && CPU_FREQ
 993         default n
 994         help
 995           This enables the CPUfreq driver for i.MX CPUs.
 996
 997           If in doubt, say N.
 998
 999 config CPU_FREQ_PXA
1000         bool
1001         depends on CPU_FREQ && ARCH_PXA && PXA25x
1002         default y
1003         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1004
1005 endmenu
1006
1007 endif
1008
1009 menu "Floating point emulation"
1010
1011 comment "At least one emulation must be selected"
1012
1013 config FPE_NWFPE
1014         bool "NWFPE math emulation"
1015         depends on !AEABI || OABI_COMPAT
1016         ---help---
1017           Say Y to include the NWFPE floating point emulator in the kernel.
1018           This is necessary to run most binaries. Linux does not currently
1019           support floating point hardware so you need to say Y here even if
1020           your machine has an FPA or floating point co-processor podule.
1021
1022           You may say N here if you are going to load the Acorn FPEmulator
1023           early in the bootup.
1024
1025 config FPE_NWFPE_XP
1026         bool "Support extended precision"
1027         depends on FPE_NWFPE
1028         help
1029           Say Y to include 80-bit support in the kernel floating-point
1030           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1031           Note that gcc does not generate 80-bit operations by default,
1032           so in most cases this option only enlarges the size of the
1033           floating point emulator without any good reason.
1034
1035           You almost surely want to say N here.
1036
1037 config FPE_FASTFPE
1038         bool "FastFPE math emulation (EXPERIMENTAL)"
1039         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1040         ---help---
1041           Say Y here to include the FAST floating point emulator in the kernel.
1042           This is an experimental much faster emulator which now also has full
1043           precision for the mantissa.  It does not support any exceptions.
1044           It is very simple, and approximately 3-6 times faster than NWFPE.
1045
1046           It should be sufficient for most programs.  It may be not suitable
1047           for scientific calculations, but you have to check this for yourself.
1048           If you do not feel you need a faster FP emulation you should better
1049           choose NWFPE.
1050
1051 config VFP
1052         bool "VFP-format floating point maths"
1053         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1054         help
1055           Say Y to include VFP support code in the kernel. This is needed
1056           if your hardware includes a VFP unit.
1057
1058           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1059           release notes and additional status information.
1060
1061           Say N if your target does not have VFP hardware.
1062
1063 config VFPv3
1064         bool
1065         depends on VFP
1066         default y if CPU_V7
1067
1068 config NEON
1069         bool "Advanced SIMD (NEON) Extension support"
1070         depends on VFPv3 && CPU_V7
1071         help
1072           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1073           Extension.
1074
1075 endmenu
1076
1077 menu "Userspace binary formats"
1078
1079 source "fs/Kconfig.binfmt"
1080
1081 config ARTHUR
1082         tristate "RISC OS personality"
1083         depends on !AEABI
1084         help
1085           Say Y here to include the kernel code necessary if you want to run
1086           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1087           experimental; if this sounds frightening, say N and sleep in peace.
1088           You can also say M here to compile this support as a module (which
1089           will be called arthur).
1090
1091 endmenu
1092
1093 menu "Power management options"
1094
1095 source "kernel/power/Kconfig"
1096
1097 config ARCH_SUSPEND_POSSIBLE
1098         def_bool y
1099
1100 endmenu
1101
1102 source "net/Kconfig"
1103
1104 menu "Device Drivers"
1105
1106 source "drivers/base/Kconfig"
1107
1108 source "drivers/connector/Kconfig"
1109
1110 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1111 source "drivers/mtd/Kconfig"
1112 endif
1113
1114 source "drivers/parport/Kconfig"
1115
1116 source "drivers/pnp/Kconfig"
1117
1118 source "drivers/block/Kconfig"
1119
1120 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1121
1122 source "drivers/misc/Kconfig"
1123
1124 source "drivers/ide/Kconfig"
1125
1126 source "drivers/scsi/Kconfig"
1127
1128 source "drivers/ata/Kconfig"
1129
1130 source "drivers/md/Kconfig"
1131
1132 source "drivers/message/fusion/Kconfig"
1133
1134 source "drivers/ieee1394/Kconfig"
1135
1136 source "drivers/message/i2o/Kconfig"
1137
1138 source "drivers/net/Kconfig"
1139
1140 source "drivers/isdn/Kconfig"
1141
1142 # input before char - char/joystick depends on it. As does USB.
1143
1144 source "drivers/input/Kconfig"
1145
1146 source "drivers/char/Kconfig"
1147
1148 source "drivers/i2c/Kconfig"
1149
1150 source "drivers/spi/Kconfig"
1151
1152 source "drivers/gpio/Kconfig"
1153
1154 source "drivers/w1/Kconfig"
1155
1156 source "drivers/power/Kconfig"
1157
1158 source "drivers/hwmon/Kconfig"
1159
1160 source "drivers/watchdog/Kconfig"
1161
1162 source "drivers/ssb/Kconfig"
1163
1164 #source "drivers/l3/Kconfig"
1165
1166 source "drivers/mfd/Kconfig"
1167
1168 source "drivers/media/Kconfig"
1169
1170 source "drivers/video/Kconfig"
1171
1172 source "sound/Kconfig"
1173
1174 source "drivers/hid/Kconfig"
1175
1176 source "drivers/usb/Kconfig"
1177
1178 source "drivers/mmc/Kconfig"
1179
1180 source "drivers/leds/Kconfig"
1181
1182 source "drivers/rtc/Kconfig"
1183
1184 source "drivers/dma/Kconfig"
1185
1186 source "drivers/dca/Kconfig"
1187
1188 source "drivers/uio/Kconfig"
1189
1190 endmenu
1191
1192 source "fs/Kconfig"
1193
1194 source "arch/arm/Kconfig.debug"
1195
1196 source "security/Kconfig"
1197
1198 source "crypto/Kconfig"
1199
1200 source "lib/Kconfig"