arch/arm/Kconfig

   1 #
   2 # For a description of the syntax of this configuration file,
   3 # see Documentation/kbuild/kconfig-language.txt.
   4 #
   5
   6 mainmenu "Linux Kernel Configuration"
   7
   8 config ARM
   9         bool
  10         default y
  11         select RTC_LIB
  12         select SYS_SUPPORTS_APM_EMULATION
  13         select HAVE_OPROFILE
  14         select HAVE_KPROBES if (!XIP_KERNEL)
  15         select HAVE_KRETPROBES if (HAVE_KPROBES)
  16         help
  17           The ARM series is a line of low-power-consumption RISC chip designs
  18           licensed by ARM Ltd and targeted at embedded applications and
  19           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  20           manufactured, but legacy ARM-based PC hardware remains popular in
  21           Europe.  There is an ARM Linux project with a web page at
  22           <http://www.arm.linux.org.uk/>.
  23
  24 config SYS_SUPPORTS_APM_EMULATION
  25         bool
  26
  27 config GENERIC_GPIO
  28         bool
  29         default n
  30
  31 config GENERIC_TIME
  32         bool
  33         default n
  34
  35 config GENERIC_CLOCKEVENTS
  36         bool
  37         default n
  38
  39 config GENERIC_CLOCKEVENTS_BROADCAST
  40         bool
  41         depends on GENERIC_CLOCKEVENTS
  42         default y if SMP && !LOCAL_TIMERS
  43
  44 config MMU
  45         bool
  46         default y
  47
  48 config NO_IOPORT
  49         bool
  50         default n
  51
  52 config EISA
  53         bool
  54         ---help---
  55           The Extended Industry Standard Architecture (EISA) bus was
  56           developed as an open alternative to the IBM MicroChannel bus.
  57
  58           The EISA bus provided some of the features of the IBM MicroChannel
  59           bus while maintaining backward compatibility with cards made for
  60           the older ISA bus.  The EISA bus saw limited use between 1988 and
  61           1995 when it was made obsolete by the PCI bus.
  62
  63           Say Y here if you are building a kernel for an EISA-based machine.
  64
  65           Otherwise, say N.
  66
  67 config SBUS
  68         bool
  69
  70 config MCA
  71         bool
  72         help
  73           MicroChannel Architecture is found in some IBM PS/2 machines and
  74           laptops.  It is a bus system similar to PCI or ISA. See
  75           <file:Documentation/mca.txt> (and especially the web page given
  76           there) before attempting to build an MCA bus kernel.
  77
  78 config GENERIC_HARDIRQS
  79         bool
  80         default y
  81
  82 config STACKTRACE_SUPPORT
  83         bool
  84         default y
  85
  86 config LOCKDEP_SUPPORT
  87         bool
  88         default y
  89
  90 config TRACE_IRQFLAGS_SUPPORT
  91         bool
  92         default y
  93
  94 config HARDIRQS_SW_RESEND
  95         bool
  96         default y
  97
  98 config GENERIC_IRQ_PROBE
  99         bool
 100         default y
 101
 102 config GENERIC_LOCKBREAK
 103         bool
 104         default y
 105         depends on SMP && PREEMPT
 106
 107 config RWSEM_GENERIC_SPINLOCK
 108         bool
 109         default y
 110
 111 config RWSEM_XCHGADD_ALGORITHM
 112         bool
 113
 114 config ARCH_HAS_ILOG2_U32
 115         bool
 116         default n
 117
 118 config ARCH_HAS_ILOG2_U64
 119         bool
 120         default n
 121
 122 config GENERIC_HWEIGHT
 123         bool
 124         default y
 125
 126 config GENERIC_CALIBRATE_DELAY
 127         bool
 128         default y
 129
 130 config ARCH_SUPPORTS_AOUT
 131         def_bool y
 132
 133 config ARCH_MAY_HAVE_PC_FDC
 134         bool
 135
 136 config ZONE_DMA
 137         bool
 138         default y
 139
 140 config GENERIC_ISA_DMA
 141         bool
 142
 143 config FIQ
 144         bool
 145
 146 config ARCH_MTD_XIP
 147         bool
 148
 149 if OPROFILE
 150
 151 config OPROFILE_ARMV6
 152         def_bool y
 153         depends on CPU_V6 && !SMP
 154         select OPROFILE_ARM11_CORE
 155
 156 config OPROFILE_MPCORE
 157         def_bool y
 158         depends on CPU_V6 && SMP
 159         select OPROFILE_ARM11_CORE
 160
 161 config OPROFILE_ARM11_CORE
 162         bool
 163
 164 endif
 165
 166 config VECTORS_BASE
 167         hex
 168         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 169         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 170         default 0x00000000
 171         help
 172           The base address of exception vectors.
 173
 174 source "init/Kconfig"
 175
 176 menu "System Type"
 177
 178 choice
 179         prompt "ARM system type"
 180         default ARCH_VERSATILE
 181
 182 config ARCH_AAEC2000
 183         bool "Agilent AAEC-2000 based"
 184         select ARM_AMBA
 185         help
 186           This enables support for systems based on the Agilent AAEC-2000
 187
 188 config ARCH_INTEGRATOR
 189         bool "ARM Ltd. Integrator family"
 190         select ARM_AMBA
 191         select ICST525
 192         help
 193           Support for ARM's Integrator platform.
 194
 195 config ARCH_REALVIEW
 196         bool "ARM Ltd. RealView family"
 197         select ARM_AMBA
 198         select ICST307
 199         select GENERIC_TIME
 200         select GENERIC_CLOCKEVENTS
 201         help
 202           This enables support for ARM Ltd RealView boards.
 203
 204 config ARCH_VERSATILE
 205         bool "ARM Ltd. Versatile family"
 206         select ARM_AMBA
 207         select ARM_VIC
 208         select ICST307
 209         select GENERIC_TIME
 210         select GENERIC_CLOCKEVENTS
 211         help
 212           This enables support for ARM Ltd Versatile board.
 213
 214 config ARCH_AT91
 215         bool "Atmel AT91"
 216         select GENERIC_GPIO
 217         help
 218           This enables support for systems based on the Atmel AT91RM9200,
 219           AT91SAM9 and AT91CAP9 processors.
 220
 221 config ARCH_CLPS7500
 222         bool "Cirrus CL-PS7500FE"
 223         select TIMER_ACORN
 224         select ISA
 225         select NO_IOPORT
 226         select HAVE_IDE
 227         help
 228           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 229
 230 config ARCH_CLPS711X
 231         bool "Cirrus Logic CLPS711x/EP721x-based"
 232         help
 233           Support for Cirrus Logic 711x/721x based boards.
 234
 235 config ARCH_CO285
 236         bool "Co-EBSA285"
 237         select FOOTBRIDGE
 238         select FOOTBRIDGE_ADDIN
 239         select HAVE_IDE
 240         help
 241           Support for Intel's EBSA285 companion chip.
 242
 243 config ARCH_EBSA110
 244         bool "EBSA-110"
 245         select ISA
 246         select NO_IOPORT
 247         help
 248           This is an evaluation board for the StrongARM processor available
 249           from Digital. It has limited hardware on-board, including an
 250           Ethernet interface, two PCMCIA sockets, two serial ports and a
 251           parallel port.
 252
 253 config ARCH_EP93XX
 254         bool "EP93xx-based"
 255         select ARM_AMBA
 256         select ARM_VIC
 257         select GENERIC_GPIO
 258         help
 259           This enables support for the Cirrus EP93xx series of CPUs.
 260
 261 config ARCH_FOOTBRIDGE
 262         bool "FootBridge"
 263         select FOOTBRIDGE
 264         select HAVE_IDE
 265         help
 266           Support for systems based on the DC21285 companion chip
 267           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 268
 269 config ARCH_NETX
 270         bool "Hilscher NetX based"
 271         select ARM_VIC
 272         help
 273           This enables support for systems based on the Hilscher NetX Soc
 274
 275 config ARCH_H720X
 276         bool "Hynix HMS720x-based"
 277         select ISA_DMA_API
 278         help
 279           This enables support for systems based on the Hynix HMS720x
 280
 281 config ARCH_IMX
 282         bool "IMX"
 283         select GENERIC_GPIO
 284         select GENERIC_TIME
 285         select GENERIC_CLOCKEVENTS
 286         help
 287           Support for Motorola's i.MX family of processors (MX1, MXL).
 288
 289 config ARCH_IOP13XX
 290         bool "IOP13xx-based"
 291         depends on MMU
 292         select PLAT_IOP
 293         select PCI
 294         select ARCH_SUPPORTS_MSI
 295         help
 296           Support for Intel's IOP13XX (XScale) family of processors.
 297
 298 config ARCH_IOP32X
 299         bool "IOP32x-based"
 300         depends on MMU
 301         select PLAT_IOP
 302         select PCI
 303         select HAVE_IDE
 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         select HAVE_IDE
 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 HAVE_IDE
 321         select PCI
 322         help
 323           Support for Intel's IXP23xx (XScale) family of processors.
 324
 325 config ARCH_IXP2000
 326         bool "IXP2400/2800-based"
 327         depends on MMU
 328         select PCI
 329         help
 330           Support for Intel's IXP2400/2800 (XScale) family of processors.
 331
 332 config ARCH_IXP4XX
 333         bool "IXP4xx-based"
 334         depends on MMU
 335         select GENERIC_GPIO
 336         select GENERIC_TIME
 337         select GENERIC_CLOCKEVENTS
 338         select HAVE_IDE
 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         select HAVE_IDE
 346         help
 347           Say Y here if you intend to run this kernel on a LinkUp Systems
 348           L7200 Software Development Board which uses an ARM720T processor.
 349           Information on this board can be obtained at:
 350
 351           <http://www.linkupsys.com/>
 352
 353           If you have any questions or comments about the Linux kernel port
 354           to this board, send e-mail to <sjhill@cotw.com>.
 355
 356 config ARCH_KS8695
 357         bool "Micrel/Kendin KS8695"
 358         select GENERIC_GPIO
 359         help
 360           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 361           System-on-Chip devices.
 362
 363 config ARCH_NS9XXX
 364         bool "NetSilicon NS9xxx"
 365         select GENERIC_GPIO
 366         select GENERIC_TIME
 367         select GENERIC_CLOCKEVENTS
 368         help
 369           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 370           System.
 371
 372           <http://www.digi.com/products/microprocessors/index.jsp>
 373
 374 config ARCH_MXC
 375         bool "Freescale MXC/iMX-based"
 376         select ARCH_MTD_XIP
 377         help
 378           Support for Freescale MXC/iMX-based family of processors
 379
 380 config ARCH_ORION
 381         bool "Marvell Orion"
 382         depends on MMU
 383         select PCI
 384         select GENERIC_GPIO
 385         select GENERIC_TIME
 386         select GENERIC_CLOCKEVENTS
 387         help
 388           Support for Marvell Orion System on Chip family.
 389
 390 config ARCH_PNX4008
 391         bool "Philips Nexperia PNX4008 Mobile"
 392         help
 393           This enables support for Philips PNX4008 mobile platform.
 394
 395 config ARCH_PXA
 396         bool "PXA2xx/PXA3xx-based"
 397         depends on MMU
 398         select ARCH_MTD_XIP
 399         select GENERIC_GPIO
 400         select HAVE_IDE
 401         select HAVE_GPIO_LIB
 402         select GENERIC_TIME
 403         select GENERIC_CLOCKEVENTS
 404         select TICK_ONESHOT
 405         help
 406           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 407
 408 config ARCH_RPC
 409         bool "RiscPC"
 410         select ARCH_ACORN
 411         select FIQ
 412         select TIMER_ACORN
 413         select ARCH_MAY_HAVE_PC_FDC
 414         select ISA_DMA_API
 415         select NO_IOPORT
 416         select HAVE_IDE
 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_MTD_XIP
 426         select GENERIC_GPIO
 427         select GENERIC_TIME
 428         select HAVE_IDE
 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         select HAVE_IDE
 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 HAVE_IDE
 444         select ISA
 445         select ISA_DMA
 446         select PCI
 447         help
 448           Support for the StrongARM based Digital DNARD machine, also known
 449           as "Shark" (<http://www.shark-linux.de/shark.html>).
 450
 451 config ARCH_LH7A40X
 452         bool "Sharp LH7A40X"
 453         select HAVE_IDE
 454         help
 455           Say Y here for systems based on one of the Sharp LH7A40X
 456           System on a Chip processors.  These CPUs include an ARM922T
 457           core with a wide array of integrated devices for
 458           hand-held and low-power applications.
 459
 460 config ARCH_DAVINCI
 461         bool "TI DaVinci"
 462         select GENERIC_TIME
 463         select GENERIC_CLOCKEVENTS
 464         select GENERIC_GPIO
 465         help
 466           Support for TI's DaVinci platform.
 467
 468 config ARCH_OMAP
 469         bool "TI OMAP"
 470         select GENERIC_GPIO
 471         select GENERIC_TIME
 472         select GENERIC_CLOCKEVENTS
 473         help
 474           Support for TI's OMAP platform (OMAP1 and OMAP2).
 475
 476 config ARCH_MSM7X00A
 477         bool "Qualcomm MSM7X00A"
 478         select GENERIC_TIME
 479         select GENERIC_CLOCKEVENTS
 480         help
 481           Support for Qualcomm MSM7X00A based systems.  This runs on the ARM11
 482           apps processor of the MSM7X00A and depends on a shared memory
 483           interface to the ARM9 modem processor which runs the baseband stack
 484           and controls some vital subsystems (clock and power control, etc).
 485           <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
 486
 487 endchoice
 488
 489 source "arch/arm/mach-clps711x/Kconfig"
 490
 491 source "arch/arm/mach-ep93xx/Kconfig"
 492
 493 source "arch/arm/mach-footbridge/Kconfig"
 494
 495 source "arch/arm/mach-integrator/Kconfig"
 496
 497 source "arch/arm/mach-iop32x/Kconfig"
 498
 499 source "arch/arm/mach-iop33x/Kconfig"
 500
 501 source "arch/arm/mach-iop13xx/Kconfig"
 502
 503 source "arch/arm/mach-ixp4xx/Kconfig"
 504
 505 source "arch/arm/mach-ixp2000/Kconfig"
 506
 507 source "arch/arm/mach-ixp23xx/Kconfig"
 508
 509 source "arch/arm/mach-pxa/Kconfig"
 510
 511 source "arch/arm/mach-sa1100/Kconfig"
 512
 513 source "arch/arm/plat-omap/Kconfig"
 514
 515 source "arch/arm/mach-omap1/Kconfig"
 516
 517 source "arch/arm/mach-omap2/Kconfig"
 518
 519 source "arch/arm/mach-orion/Kconfig"
 520
 521 source "arch/arm/plat-s3c24xx/Kconfig"
 522 source "arch/arm/plat-s3c/Kconfig"
 523
 524 if ARCH_S3C2410
 525 source "arch/arm/mach-s3c2400/Kconfig"
 526 source "arch/arm/mach-s3c2410/Kconfig"
 527 source "arch/arm/mach-s3c2412/Kconfig"
 528 source "arch/arm/mach-s3c2440/Kconfig"
 529 source "arch/arm/mach-s3c2442/Kconfig"
 530 source "arch/arm/mach-s3c2443/Kconfig"
 531 endif
 532
 533 source "arch/arm/mach-lh7a40x/Kconfig"
 534
 535 source "arch/arm/mach-imx/Kconfig"
 536
 537 source "arch/arm/mach-h720x/Kconfig"
 538
 539 source "arch/arm/mach-versatile/Kconfig"
 540
 541 source "arch/arm/mach-aaec2000/Kconfig"
 542
 543 source "arch/arm/mach-realview/Kconfig"
 544
 545 source "arch/arm/mach-at91/Kconfig"
 546
 547 source "arch/arm/plat-mxc/Kconfig"
 548
 549 source "arch/arm/mach-netx/Kconfig"
 550
 551 source "arch/arm/mach-ns9xxx/Kconfig"
 552
 553 source "arch/arm/mach-davinci/Kconfig"
 554
 555 source "arch/arm/mach-ks8695/Kconfig"
 556
 557 source "arch/arm/mach-msm/Kconfig"
 558
 559 # Definitions to make life easier
 560 config ARCH_ACORN
 561         bool
 562
 563 config PLAT_IOP
 564         bool
 565
 566 source arch/arm/mm/Kconfig
 567
 568 config IWMMXT
 569         bool "Enable iWMMXt support"
 570         depends on CPU_XSCALE || CPU_XSC3
 571         default y if PXA27x || PXA3xx
 572         help
 573           Enable support for iWMMXt context switching at run time if
 574           running on a CPU that supports it.
 575
 576 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 577 config XSCALE_PMU
 578         bool
 579         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 580         default y
 581
 582 if !MMU
 583 source "arch/arm/Kconfig-nommu"
 584 endif
 585
 586 endmenu
 587
 588 source "arch/arm/common/Kconfig"
 589
 590 config FORCE_MAX_ZONEORDER
 591         int
 592         depends on SA1111
 593         default "9"
 594
 595 menu "Bus support"
 596
 597 config ARM_AMBA
 598         bool
 599
 600 config ISA
 601         bool
 602         help
 603           Find out whether you have ISA slots on your motherboard.  ISA is the
 604           name of a bus system, i.e. the way the CPU talks to the other stuff
 605           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 606           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 607           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 608
 609 # Select ISA DMA controller support
 610 config ISA_DMA
 611         bool
 612         select ISA_DMA_API
 613
 614 # Select ISA DMA interface
 615 config ISA_DMA_API
 616         bool
 617
 618 config PCI
 619         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 620         help
 621           Find out whether you have a PCI motherboard. PCI is the name of a
 622           bus system, i.e. the way the CPU talks to the other stuff inside
 623           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 624           VESA. If you have PCI, say Y, otherwise N.
 625
 626 config PCI_SYSCALL
 627         def_bool PCI
 628
 629 # Select the host bridge type
 630 config PCI_HOST_VIA82C505
 631         bool
 632         depends on PCI && ARCH_SHARK
 633         default y
 634
 635 config PCI_HOST_ITE8152
 636         bool
 637         depends on PCI && MACH_ARMCORE
 638         default y
 639         select DMABOUNCE
 640
 641 source "drivers/pci/Kconfig"
 642
 643 source "drivers/pcmcia/Kconfig"
 644
 645 endmenu
 646
 647 menu "Kernel Features"
 648
 649 source "kernel/time/Kconfig"
 650
 651 config SMP
 652         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 653         depends on EXPERIMENTAL && REALVIEW_EB_ARM11MP
 654         help
 655           This enables support for systems with more than one CPU. If you have
 656           a system with only one CPU, like most personal computers, say N. If
 657           you have a system with more than one CPU, say Y.
 658
 659           If you say N here, the kernel will run on single and multiprocessor
 660           machines, but will use only one CPU of a multiprocessor machine. If
 661           you say Y here, the kernel will run on many, but not all, single
 662           processor machines. On a single processor machine, the kernel will
 663           run faster if you say N here.
 664
 665           See also <file:Documentation/i386/IO-APIC.txt>,
 666           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 667           <http://www.linuxdoc.org/docs.html#howto>.
 668
 669           If you don't know what to do here, say N.
 670
 671 config NR_CPUS
 672         int "Maximum number of CPUs (2-32)"
 673         range 2 32
 674         depends on SMP
 675         default "4"
 676
 677 config HOTPLUG_CPU
 678         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 679         depends on SMP && HOTPLUG && EXPERIMENTAL
 680         help
 681           Say Y here to experiment with turning CPUs off and on.  CPUs
 682           can be controlled through /sys/devices/system/cpu.
 683
 684 config LOCAL_TIMERS
 685         bool "Use local timer interrupts"
 686         depends on SMP && REALVIEW_EB_ARM11MP
 687         default y
 688         help
 689           Enable support for local timers on SMP platforms, rather then the
 690           legacy IPI broadcast method.  Local timers allows the system
 691           accounting to be spread across the timer interval, preventing a
 692           "thundering herd" at every timer tick.
 693
 694 config PREEMPT
 695         bool "Preemptible Kernel (EXPERIMENTAL)"
 696         depends on EXPERIMENTAL
 697         help
 698           This option reduces the latency of the kernel when reacting to
 699           real-time or interactive events by allowing a low priority process to
 700           be preempted even if it is in kernel mode executing a system call.
 701           This allows applications to run more reliably even when the system is
 702           under load.
 703
 704           Say Y here if you are building a kernel for a desktop, embedded
 705           or real-time system.  Say N if you are unsure.
 706
 707 config NO_IDLE_HZ
 708         bool "Dynamic tick timer"
 709         depends on !GENERIC_CLOCKEVENTS
 710         help
 711           Select this option if you want to disable continuous timer ticks
 712           and have them programmed to occur as required. This option saves
 713           power as the system can remain in idle state for longer.
 714
 715           By default dynamic tick is disabled during the boot, and can be
 716           manually enabled with:
 717
 718             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 719
 720           Alternatively, if you want dynamic tick automatically enabled
 721           during boot, pass "dyntick=enable" via the kernel command string.
 722
 723           Please note that dynamic tick may affect the accuracy of
 724           timekeeping on some platforms depending on the implementation.
 725           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 726           to have accurate timekeeping with dynamic tick.
 727
 728 config HZ
 729         int
 730         default 128 if ARCH_L7200
 731         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 732         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 733         default AT91_TIMER_HZ if ARCH_AT91
 734         default 100
 735
 736 config AEABI
 737         bool "Use the ARM EABI to compile the kernel"
 738         help
 739           This option allows for the kernel to be compiled using the latest
 740           ARM ABI (aka EABI).  This is only useful if you are using a user
 741           space environment that is also compiled with EABI.
 742
 743           Since there are major incompatibilities between the legacy ABI and
 744           EABI, especially with regard to structure member alignment, this
 745           option also changes the kernel syscall calling convention to
 746           disambiguate both ABIs and allow for backward compatibility support
 747           (selected with CONFIG_OABI_COMPAT).
 748
 749           To use this you need GCC version 4.0.0 or later.
 750
 751 config OABI_COMPAT
 752         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 753         depends on AEABI && EXPERIMENTAL
 754         default y
 755         help
 756           This option preserves the old syscall interface along with the
 757           new (ARM EABI) one. It also provides a compatibility layer to
 758           intercept syscalls that have structure arguments which layout
 759           in memory differs between the legacy ABI and the new ARM EABI
 760           (only for non "thumb" binaries). This option adds a tiny
 761           overhead to all syscalls and produces a slightly larger kernel.
 762           If you know you'll be using only pure EABI user space then you
 763           can say N here. If this option is not selected and you attempt
 764           to execute a legacy ABI binary then the result will be
 765           UNPREDICTABLE (in fact it can be predicted that it won't work
 766           at all). If in doubt say Y.
 767
 768 config ARCH_DISCONTIGMEM_ENABLE
 769         bool
 770         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 771         help
 772           Say Y to support efficient handling of discontiguous physical memory,
 773           for architectures which are either NUMA (Non-Uniform Memory Access)
 774           or have huge holes in the physical address space for other reasons.
 775           See <file:Documentation/vm/numa> for more.
 776
 777 config NODES_SHIFT
 778         int
 779         default "4" if ARCH_LH7A40X
 780         default "2"
 781         depends on NEED_MULTIPLE_NODES
 782
 783 source "mm/Kconfig"
 784
 785 config LEDS
 786         bool "Timer and CPU usage LEDs"
 787         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 788                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 789                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 790                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 791                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 792                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 793                    ARCH_KS8695 || MACH_RD88F5182
 794         help
 795           If you say Y here, the LEDs on your machine will be used
 796           to provide useful information about your current system status.
 797
 798           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 799           be able to select which LEDs are active using the options below. If
 800           you are compiling a kernel for the EBSA-110 or the LART however, the
 801           red LED will simply flash regularly to indicate that the system is
 802           still functional. It is safe to say Y here if you have a CATS
 803           system, but the driver will do nothing.
 804
 805 config LEDS_TIMER
 806         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 807                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 808                             || MACH_OMAP_PERSEUS2
 809         depends on LEDS
 810         depends on !GENERIC_CLOCKEVENTS
 811         default y if ARCH_EBSA110
 812         help
 813           If you say Y here, one of the system LEDs (the green one on the
 814           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 815           will flash regularly to indicate that the system is still
 816           operational. This is mainly useful to kernel hackers who are
 817           debugging unstable kernels.
 818
 819           The LART uses the same LED for both Timer LED and CPU usage LED
 820           functions. You may choose to use both, but the Timer LED function
 821           will overrule the CPU usage LED.
 822
 823 config LEDS_CPU
 824         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 825                         !ARCH_OMAP) \
 826                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 827                         || MACH_OMAP_PERSEUS2
 828         depends on LEDS
 829         help
 830           If you say Y here, the red LED will be used to give a good real
 831           time indication of CPU usage, by lighting whenever the idle task
 832           is not currently executing.
 833
 834           The LART uses the same LED for both Timer LED and CPU usage LED
 835           functions. You may choose to use both, but the Timer LED function
 836           will overrule the CPU usage LED.
 837
 838 config ALIGNMENT_TRAP
 839         bool
 840         depends on CPU_CP15_MMU
 841         default y if !ARCH_EBSA110
 842         help
 843           ARM processors cannot fetch/store information which is not
 844           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 845           address divisible by 4. On 32-bit ARM processors, these non-aligned
 846           fetch/store instructions will be emulated in software if you say
 847           here, which has a severe performance impact. This is necessary for
 848           correct operation of some network protocols. With an IP-only
 849           configuration it is safe to say N, otherwise say Y.
 850
 851 endmenu
 852
 853 menu "Boot options"
 854
 855 # Compressed boot loader in ROM.  Yes, we really want to ask about
 856 # TEXT and BSS so we preserve their values in the config files.
 857 config ZBOOT_ROM_TEXT
 858         hex "Compressed ROM boot loader base address"
 859         default "0"
 860         help
 861           The physical address at which the ROM-able zImage is to be
 862           placed in the target.  Platforms which normally make use of
 863           ROM-able zImage formats normally set this to a suitable
 864           value in their defconfig file.
 865
 866           If ZBOOT_ROM is not enabled, this has no effect.
 867
 868 config ZBOOT_ROM_BSS
 869         hex "Compressed ROM boot loader BSS address"
 870         default "0"
 871         help
 872           The base address of an area of read/write memory in the target
 873           for the ROM-able zImage which must be available while the
 874           decompressor is running. It must be large enough to hold the
 875           entire decompressed kernel plus an additional 128 KiB.
 876           Platforms which normally make use of ROM-able zImage formats
 877           normally set this to a suitable value in their defconfig file.
 878
 879           If ZBOOT_ROM is not enabled, this has no effect.
 880
 881 config ZBOOT_ROM
 882         bool "Compressed boot loader in ROM/flash"
 883         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 884         help
 885           Say Y here if you intend to execute your compressed kernel image
 886           (zImage) directly from ROM or flash.  If unsure, say N.
 887
 888 config CMDLINE
 889         string "Default kernel command string"
 890         default ""
 891         help
 892           On some architectures (EBSA110 and CATS), there is currently no way
 893           for the boot loader to pass arguments to the kernel. For these
 894           architectures, you should supply some command-line options at build
 895           time by entering them here. As a minimum, you should specify the
 896           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 897
 898 config XIP_KERNEL
 899         bool "Kernel Execute-In-Place from ROM"
 900         depends on !ZBOOT_ROM
 901         help
 902           Execute-In-Place allows the kernel to run from non-volatile storage
 903           directly addressable by the CPU, such as NOR flash. This saves RAM
 904           space since the text section of the kernel is not loaded from flash
 905           to RAM.  Read-write sections, such as the data section and stack,
 906           are still copied to RAM.  The XIP kernel is not compressed since
 907           it has to run directly from flash, so it will take more space to
 908           store it.  The flash address used to link the kernel object files,
 909           and for storing it, is configuration dependent. Therefore, if you
 910           say Y here, you must know the proper physical address where to
 911           store the kernel image depending on your own flash memory usage.
 912
 913           Also note that the make target becomes "make xipImage" rather than
 914           "make zImage" or "make Image".  The final kernel binary to put in
 915           ROM memory will be arch/arm/boot/xipImage.
 916
 917           If unsure, say N.
 918
 919 config XIP_PHYS_ADDR
 920         hex "XIP Kernel Physical Location"
 921         depends on XIP_KERNEL
 922         default "0x00080000"
 923         help
 924           This is the physical address in your flash memory the kernel will
 925           be linked for and stored to.  This address is dependent on your
 926           own flash usage.
 927
 928 config KEXEC
 929         bool "Kexec system call (EXPERIMENTAL)"
 930         depends on EXPERIMENTAL
 931         help
 932           kexec is a system call that implements the ability to shutdown your
 933           current kernel, and to start another kernel.  It is like a reboot
 934           but it is independent of the system firmware.   And like a reboot
 935           you can start any kernel with it, not just Linux.
 936
 937           It is an ongoing process to be certain the hardware in a machine
 938           is properly shutdown, so do not be surprised if this code does not
 939           initially work for you.  It may help to enable device hotplugging
 940           support.
 941
 942 config ATAGS_PROC
 943         bool "Export atags in procfs"
 944         depends on KEXEC
 945         default y
 946         help
 947           Should the atags used to boot the kernel be exported in an "atags"
 948           file in procfs. Useful with kexec.
 949
 950 endmenu
 951
 952 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
 953
 954 menu "CPU Frequency scaling"
 955
 956 source "drivers/cpufreq/Kconfig"
 957
 958 config CPU_FREQ_SA1100
 959         bool
 960         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 961         default y
 962
 963 config CPU_FREQ_SA1110
 964         bool
 965         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 966         default y
 967
 968 config CPU_FREQ_INTEGRATOR
 969         tristate "CPUfreq driver for ARM Integrator CPUs"
 970         depends on ARCH_INTEGRATOR && CPU_FREQ
 971         default y
 972         help
 973           This enables the CPUfreq driver for ARM Integrator CPUs.
 974
 975           For details, take a look at <file:Documentation/cpu-freq>.
 976
 977           If in doubt, say Y.
 978
 979 config CPU_FREQ_IMX
 980         tristate "CPUfreq driver for i.MX CPUs"
 981         depends on ARCH_IMX && CPU_FREQ
 982         default n
 983         help
 984           This enables the CPUfreq driver for i.MX CPUs.
 985
 986           If in doubt, say N.
 987
 988 config CPU_FREQ_PXA
 989         bool
 990         depends on CPU_FREQ && ARCH_PXA && PXA25x
 991         default y
 992         select CPU_FREQ_DEFAULT_GOV_USERSPACE
 993
 994 endmenu
 995
 996 endif
 997
 998 menu "Floating point emulation"
 999
1000 comment "At least one emulation must be selected"
1001
1002 config FPE_NWFPE
1003         bool "NWFPE math emulation"
1004         depends on !AEABI || OABI_COMPAT
1005         ---help---
1006           Say Y to include the NWFPE floating point emulator in the kernel.
1007           This is necessary to run most binaries. Linux does not currently
1008           support floating point hardware so you need to say Y here even if
1009           your machine has an FPA or floating point co-processor podule.
1010
1011           You may say N here if you are going to load the Acorn FPEmulator
1012           early in the bootup.
1013
1014 config FPE_NWFPE_XP
1015         bool "Support extended precision"
1016         depends on FPE_NWFPE
1017         help
1018           Say Y to include 80-bit support in the kernel floating-point
1019           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1020           Note that gcc does not generate 80-bit operations by default,
1021           so in most cases this option only enlarges the size of the
1022           floating point emulator without any good reason.
1023
1024           You almost surely want to say N here.
1025
1026 config FPE_FASTFPE
1027         bool "FastFPE math emulation (EXPERIMENTAL)"
1028         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1029         ---help---
1030           Say Y here to include the FAST floating point emulator in the kernel.
1031           This is an experimental much faster emulator which now also has full
1032           precision for the mantissa.  It does not support any exceptions.
1033           It is very simple, and approximately 3-6 times faster than NWFPE.
1034
1035           It should be sufficient for most programs.  It may be not suitable
1036           for scientific calculations, but you have to check this for yourself.
1037           If you do not feel you need a faster FP emulation you should better
1038           choose NWFPE.
1039
1040 config VFP
1041         bool "VFP-format floating point maths"
1042         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1043         help
1044           Say Y to include VFP support code in the kernel. This is needed
1045           if your hardware includes a VFP unit.
1046
1047           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1048           release notes and additional status information.
1049
1050           Say N if your target does not have VFP hardware.
1051
1052 config VFPv3
1053         bool
1054         depends on VFP
1055         default y if CPU_V7
1056
1057 config NEON
1058         bool "Advanced SIMD (NEON) Extension support"
1059         depends on VFPv3 && CPU_V7
1060         help
1061           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1062           Extension.
1063
1064 endmenu
1065
1066 menu "Userspace binary formats"
1067
1068 source "fs/Kconfig.binfmt"
1069
1070 config ARTHUR
1071         tristate "RISC OS personality"
1072         depends on !AEABI
1073         help
1074           Say Y here to include the kernel code necessary if you want to run
1075           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1076           experimental; if this sounds frightening, say N and sleep in peace.
1077           You can also say M here to compile this support as a module (which
1078           will be called arthur).
1079
1080 endmenu
1081
1082 menu "Power management options"
1083
1084 source "kernel/power/Kconfig"
1085
1086 config ARCH_SUSPEND_POSSIBLE
1087         def_bool y
1088
1089 endmenu
1090
1091 source "net/Kconfig"
1092
1093 menu "Device Drivers"
1094
1095 source "drivers/base/Kconfig"
1096
1097 source "drivers/connector/Kconfig"
1098
1099 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1100 source "drivers/mtd/Kconfig"
1101 endif
1102
1103 source "drivers/parport/Kconfig"
1104
1105 source "drivers/pnp/Kconfig"
1106
1107 source "drivers/block/Kconfig"
1108
1109 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1110
1111 source "drivers/misc/Kconfig"
1112
1113 source "drivers/ide/Kconfig"
1114
1115 source "drivers/scsi/Kconfig"
1116
1117 source "drivers/ata/Kconfig"
1118
1119 source "drivers/md/Kconfig"
1120
1121 source "drivers/message/fusion/Kconfig"
1122
1123 source "drivers/ieee1394/Kconfig"
1124
1125 source "drivers/message/i2o/Kconfig"
1126
1127 source "drivers/net/Kconfig"
1128
1129 source "drivers/isdn/Kconfig"
1130
1131 # input before char - char/joystick depends on it. As does USB.
1132
1133 source "drivers/input/Kconfig"
1134
1135 source "drivers/char/Kconfig"
1136
1137 source "drivers/i2c/Kconfig"
1138
1139 source "drivers/spi/Kconfig"
1140
1141 source "drivers/gpio/Kconfig"
1142
1143 source "drivers/w1/Kconfig"
1144
1145 source "drivers/power/Kconfig"
1146
1147 source "drivers/hwmon/Kconfig"
1148
1149 source "drivers/watchdog/Kconfig"
1150
1151 source "drivers/ssb/Kconfig"
1152
1153 #source "drivers/l3/Kconfig"
1154
1155 source "drivers/mfd/Kconfig"
1156
1157 source "drivers/media/Kconfig"
1158
1159 source "drivers/video/Kconfig"
1160
1161 source "sound/Kconfig"
1162
1163 source "drivers/hid/Kconfig"
1164
1165 source "drivers/usb/Kconfig"
1166
1167 source "drivers/mmc/Kconfig"
1168
1169 source "drivers/leds/Kconfig"
1170
1171 source "drivers/rtc/Kconfig"
1172
1173 source "drivers/dma/Kconfig"
1174
1175 source "drivers/dca/Kconfig"
1176
1177 endmenu
1178
1179 source "fs/Kconfig"
1180
1181 source "arch/arm/Kconfig.debug"
1182
1183 source "security/Kconfig"
1184
1185 source "crypto/Kconfig"
1186
1187 source "lib/Kconfig"