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