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