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         help
  14           The ARM series is a line of low-power-consumption RISC chip designs
  15           licensed by ARM Ltd and targeted at embedded applications and
  16           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  17           manufactured, but legacy ARM-based PC hardware remains popular in
  18           Europe.  There is an ARM Linux project with a web page at
  19           <http://www.arm.linux.org.uk/>.
  20
  21 config SYS_SUPPORTS_APM_EMULATION
  22         bool
  23
  24 config GENERIC_GPIO
  25         bool
  26         default n
  27
  28 config GENERIC_TIME
  29         bool
  30         default n
  31
  32 config GENERIC_CLOCKEVENTS
  33         bool
  34         default n
  35
  36 config MMU
  37         bool
  38         default y
  39
  40 config NO_IOPORT
  41         bool
  42         default n
  43
  44 config EISA
  45         bool
  46         ---help---
  47           The Extended Industry Standard Architecture (EISA) bus was
  48           developed as an open alternative to the IBM MicroChannel bus.
  49
  50           The EISA bus provided some of the features of the IBM MicroChannel
  51           bus while maintaining backward compatibility with cards made for
  52           the older ISA bus.  The EISA bus saw limited use between 1988 and
  53           1995 when it was made obsolete by the PCI bus.
  54
  55           Say Y here if you are building a kernel for an EISA-based machine.
  56
  57           Otherwise, say N.
  58
  59 config SBUS
  60         bool
  61
  62 config MCA
  63         bool
  64         help
  65           MicroChannel Architecture is found in some IBM PS/2 machines and
  66           laptops.  It is a bus system similar to PCI or ISA. See
  67           <file:Documentation/mca.txt> (and especially the web page given
  68           there) before attempting to build an MCA bus kernel.
  69
  70 config GENERIC_HARDIRQS
  71         bool
  72         default y
  73
  74 config STACKTRACE_SUPPORT
  75         bool
  76         default y
  77
  78 config LOCKDEP_SUPPORT
  79         bool
  80         default y
  81
  82 config TRACE_IRQFLAGS_SUPPORT
  83         bool
  84         default y
  85
  86 config HARDIRQS_SW_RESEND
  87         bool
  88         default y
  89
  90 config GENERIC_IRQ_PROBE
  91         bool
  92         default y
  93
  94 config RWSEM_GENERIC_SPINLOCK
  95         bool
  96         default y
  97
  98 config RWSEM_XCHGADD_ALGORITHM
  99         bool
 100
 101 config ARCH_HAS_ILOG2_U32
 102         bool
 103         default n
 104
 105 config ARCH_HAS_ILOG2_U64
 106         bool
 107         default n
 108
 109 config GENERIC_HWEIGHT
 110         bool
 111         default y
 112
 113 config GENERIC_CALIBRATE_DELAY
 114         bool
 115         default y
 116
 117 config ARCH_MAY_HAVE_PC_FDC
 118         bool
 119
 120 config ZONE_DMA
 121         bool
 122         default y
 123
 124 config GENERIC_ISA_DMA
 125         bool
 126
 127 config FIQ
 128         bool
 129
 130 config ARCH_MTD_XIP
 131         bool
 132
 133 config VECTORS_BASE
 134         hex
 135         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 136         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 137         default 0x00000000
 138         help
 139           The base address of exception vectors.
 140
 141 source "init/Kconfig"
 142
 143 menu "System Type"
 144
 145 choice
 146         prompt "ARM system type"
 147         default ARCH_VERSATILE
 148
 149 config ARCH_AAEC2000
 150         bool "Agilent AAEC-2000 based"
 151         select ARM_AMBA
 152         help
 153           This enables support for systems based on the Agilent AAEC-2000
 154
 155 config ARCH_INTEGRATOR
 156         bool "ARM Ltd. Integrator family"
 157         select ARM_AMBA
 158         select ICST525
 159         help
 160           Support for ARM's Integrator platform.
 161
 162 config ARCH_REALVIEW
 163         bool "ARM Ltd. RealView family"
 164         select ARM_AMBA
 165         select ICST307
 166         help
 167           This enables support for ARM Ltd RealView boards.
 168
 169 config ARCH_VERSATILE
 170         bool "ARM Ltd. Versatile family"
 171         select ARM_AMBA
 172         select ARM_VIC
 173         select ICST307
 174         select GENERIC_TIME
 175         select GENERIC_CLOCKEVENTS
 176         help
 177           This enables support for ARM Ltd Versatile board.
 178
 179 config ARCH_AT91
 180         bool "Atmel AT91"
 181         select GENERIC_GPIO
 182         help
 183           This enables support for systems based on the Atmel AT91RM9200
 184           and AT91SAM9xxx processors.
 185
 186 config ARCH_CLPS7500
 187         bool "Cirrus CL-PS7500FE"
 188         select TIMER_ACORN
 189         select ISA
 190         select NO_IOPORT
 191         help
 192           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 193
 194 config ARCH_CLPS711X
 195         bool "Cirrus Logic CLPS711x/EP721x-based"
 196         help
 197           Support for Cirrus Logic 711x/721x based boards.
 198
 199 config ARCH_CO285
 200         bool "Co-EBSA285"
 201         select FOOTBRIDGE
 202         select FOOTBRIDGE_ADDIN
 203         help
 204           Support for Intel's EBSA285 companion chip.
 205
 206 config ARCH_EBSA110
 207         bool "EBSA-110"
 208         select ISA
 209         select NO_IOPORT
 210         help
 211           This is an evaluation board for the StrongARM processor available
 212           from Digital. It has limited hardware on-board, including an
 213           Ethernet interface, two PCMCIA sockets, two serial ports and a
 214           parallel port.
 215
 216 config ARCH_EP93XX
 217         bool "EP93xx-based"
 218         select ARM_AMBA
 219         select ARM_VIC
 220         help
 221           This enables support for the Cirrus EP93xx series of CPUs.
 222
 223 config ARCH_FOOTBRIDGE
 224         bool "FootBridge"
 225         select FOOTBRIDGE
 226         help
 227           Support for systems based on the DC21285 companion chip
 228           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 229
 230 config ARCH_NETX
 231         bool "Hilscher NetX based"
 232         select ARM_VIC
 233         help
 234           This enables support for systems based on the Hilscher NetX Soc
 235
 236 config ARCH_H720X
 237         bool "Hynix HMS720x-based"
 238         select ISA_DMA_API
 239         help
 240           This enables support for systems based on the Hynix HMS720x
 241
 242 config ARCH_IMX
 243         bool "IMX"
 244         select GENERIC_GPIO
 245         select GENERIC_TIME
 246         select GENERIC_CLOCKEVENTS
 247         help
 248           Support for Motorola's i.MX family of processors (MX1, MXL).
 249
 250 config ARCH_IOP13XX
 251         bool "IOP13xx-based"
 252         depends on MMU
 253         select PLAT_IOP
 254         select PCI
 255         select ARCH_SUPPORTS_MSI
 256         help
 257           Support for Intel's IOP13XX (XScale) family of processors.
 258
 259 config ARCH_IOP32X
 260         bool "IOP32x-based"
 261         depends on MMU
 262         select PLAT_IOP
 263         select PCI
 264         help
 265           Support for Intel's 80219 and IOP32X (XScale) family of
 266           processors.
 267
 268 config ARCH_IOP33X
 269         bool "IOP33x-based"
 270         depends on MMU
 271         select PLAT_IOP
 272         select PCI
 273         help
 274           Support for Intel's IOP33X (XScale) family of processors.
 275
 276 config ARCH_IXP23XX
 277         bool "IXP23XX-based"
 278         depends on MMU
 279         select PCI
 280         help
 281           Support for Intel's IXP23xx (XScale) family of processors.
 282
 283 config ARCH_IXP2000
 284         bool "IXP2400/2800-based"
 285         depends on MMU
 286         select PCI
 287         help
 288           Support for Intel's IXP2400/2800 (XScale) family of processors.
 289
 290 config ARCH_IXP4XX
 291         bool "IXP4xx-based"
 292         depends on MMU
 293         select GENERIC_GPIO
 294         select GENERIC_TIME
 295         select GENERIC_CLOCKEVENTS
 296         help
 297           Support for Intel's IXP4XX (XScale) family of processors.
 298
 299 config ARCH_L7200
 300         bool "LinkUp-L7200"
 301         select FIQ
 302         help
 303           Say Y here if you intend to run this kernel on a LinkUp Systems
 304           L7200 Software Development Board which uses an ARM720T processor.
 305           Information on this board can be obtained at:
 306
 307           <http://www.linkupsys.com/>
 308
 309           If you have any questions or comments about the Linux kernel port
 310           to this board, send e-mail to <sjhill@cotw.com>.
 311
 312 config ARCH_KS8695
 313         bool "Micrel/Kendin KS8695"
 314         select GENERIC_GPIO
 315         help
 316           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 317           System-on-Chip devices.
 318
 319 config ARCH_NS9XXX
 320         bool "NetSilicon NS9xxx"
 321         help
 322           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 323           System.
 324
 325           <http://www.digi.com/products/microprocessors/index.jsp>
 326
 327 config ARCH_MXC
 328         bool "Freescale MXC/iMX-based"
 329         select ARCH_MTD_XIP
 330         help
 331           Support for Freescale MXC/iMX-based family of processors
 332
 333 config ARCH_PNX4008
 334         bool "Philips Nexperia PNX4008 Mobile"
 335         help
 336           This enables support for Philips PNX4008 mobile platform.
 337
 338 config ARCH_PXA
 339         bool "PXA2xx-based"
 340         depends on MMU
 341         select ARCH_MTD_XIP
 342         select GENERIC_GPIO
 343         select GENERIC_TIME
 344         help
 345           Support for Intel's PXA2XX processor line.
 346
 347 config ARCH_RPC
 348         bool "RiscPC"
 349         select ARCH_ACORN
 350         select FIQ
 351         select TIMER_ACORN
 352         select ARCH_MAY_HAVE_PC_FDC
 353         select ISA_DMA_API
 354         select NO_IOPORT
 355         help
 356           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 357           CD-ROM interface, serial and parallel port, and the floppy drive.
 358
 359 config ARCH_SA1100
 360         bool "SA1100-based"
 361         select ISA
 362         select ARCH_DISCONTIGMEM_ENABLE
 363         select ARCH_MTD_XIP
 364         select GENERIC_GPIO
 365         help
 366           Support for StrongARM 11x0 based boards.
 367
 368 config ARCH_S3C2410
 369         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 370         select GENERIC_GPIO
 371         help
 372           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 373           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 374           the Samsung SMDK2410 development board (and derivatives).
 375
 376 config ARCH_SHARK
 377         bool "Shark"
 378         select ISA
 379         select ISA_DMA
 380         select PCI
 381         help
 382           Support for the StrongARM based Digital DNARD machine, also known
 383           as "Shark" (<http://www.shark-linux.de/shark.html>).
 384
 385 config ARCH_LH7A40X
 386         bool "Sharp LH7A40X"
 387         help
 388           Say Y here for systems based on one of the Sharp LH7A40X
 389           System on a Chip processors.  These CPUs include an ARM922T
 390           core with a wide array of integrated devices for
 391           hand-held and low-power applications.
 392
 393 config ARCH_DAVINCI
 394         bool "TI DaVinci"
 395         select GENERIC_TIME
 396         select GENERIC_CLOCKEVENTS
 397         select GENERIC_GPIO
 398         help
 399           Support for TI's DaVinci platform.
 400
 401 config ARCH_OMAP
 402         bool "TI OMAP"
 403         select GENERIC_GPIO
 404         select GENERIC_TIME
 405         help
 406           Support for TI's OMAP platform (OMAP1 and OMAP2).
 407
 408 endchoice
 409
 410 source "arch/arm/mach-clps711x/Kconfig"
 411
 412 source "arch/arm/mach-ep93xx/Kconfig"
 413
 414 source "arch/arm/mach-footbridge/Kconfig"
 415
 416 source "arch/arm/mach-integrator/Kconfig"
 417
 418 source "arch/arm/mach-iop32x/Kconfig"
 419
 420 source "arch/arm/mach-iop33x/Kconfig"
 421
 422 source "arch/arm/mach-iop13xx/Kconfig"
 423
 424 source "arch/arm/mach-ixp4xx/Kconfig"
 425
 426 source "arch/arm/mach-ixp2000/Kconfig"
 427
 428 source "arch/arm/mach-ixp23xx/Kconfig"
 429
 430 source "arch/arm/mach-pxa/Kconfig"
 431
 432 source "arch/arm/mach-sa1100/Kconfig"
 433
 434 source "arch/arm/plat-omap/Kconfig"
 435
 436 source "arch/arm/mach-omap1/Kconfig"
 437
 438 source "arch/arm/mach-omap2/Kconfig"
 439
 440 source "arch/arm/plat-s3c24xx/Kconfig"
 441 source "arch/arm/plat-s3c/Kconfig"
 442
 443 if ARCH_S3C2410
 444 source "arch/arm/mach-s3c2400/Kconfig"
 445 source "arch/arm/mach-s3c2410/Kconfig"
 446 source "arch/arm/mach-s3c2412/Kconfig"
 447 source "arch/arm/mach-s3c2440/Kconfig"
 448 source "arch/arm/mach-s3c2442/Kconfig"
 449 source "arch/arm/mach-s3c2443/Kconfig"
 450 endif
 451
 452 source "arch/arm/mach-lh7a40x/Kconfig"
 453
 454 source "arch/arm/mach-imx/Kconfig"
 455
 456 source "arch/arm/mach-h720x/Kconfig"
 457
 458 source "arch/arm/mach-versatile/Kconfig"
 459
 460 source "arch/arm/mach-aaec2000/Kconfig"
 461
 462 source "arch/arm/mach-realview/Kconfig"
 463
 464 source "arch/arm/mach-at91/Kconfig"
 465
 466 source "arch/arm/plat-mxc/Kconfig"
 467
 468 source "arch/arm/mach-netx/Kconfig"
 469
 470 source "arch/arm/mach-ns9xxx/Kconfig"
 471
 472 source "arch/arm/mach-davinci/Kconfig"
 473
 474 source "arch/arm/mach-ks8695/Kconfig"
 475
 476 # Definitions to make life easier
 477 config ARCH_ACORN
 478         bool
 479
 480 config PLAT_IOP
 481         bool
 482
 483 source arch/arm/mm/Kconfig
 484
 485 config IWMMXT
 486         bool "Enable iWMMXt support"
 487         depends on CPU_XSCALE || CPU_XSC3
 488         default y if PXA27x
 489         help
 490           Enable support for iWMMXt context switching at run time if
 491           running on a CPU that supports it.
 492
 493 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 494 config XSCALE_PMU
 495         bool
 496         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 497         default y
 498
 499 if !MMU
 500 source "arch/arm/Kconfig-nommu"
 501 endif
 502
 503 endmenu
 504
 505 source "arch/arm/common/Kconfig"
 506
 507 config FORCE_MAX_ZONEORDER
 508         int
 509         depends on SA1111
 510         default "9"
 511
 512 menu "Bus support"
 513
 514 config ARM_AMBA
 515         bool
 516
 517 config ISA
 518         bool
 519         help
 520           Find out whether you have ISA slots on your motherboard.  ISA is the
 521           name of a bus system, i.e. the way the CPU talks to the other stuff
 522           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 523           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 524           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 525
 526 # Select ISA DMA controller support
 527 config ISA_DMA
 528         bool
 529         select ISA_DMA_API
 530
 531 # Select ISA DMA interface
 532 config ISA_DMA_API
 533         bool
 534
 535 config PCI
 536         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695
 537         help
 538           Find out whether you have a PCI motherboard. PCI is the name of a
 539           bus system, i.e. the way the CPU talks to the other stuff inside
 540           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 541           VESA. If you have PCI, say Y, otherwise N.
 542
 543           The PCI-HOWTO, available from
 544           <http://www.tldp.org/docs.html#howto>, contains valuable
 545           information about which PCI hardware does work under Linux and which
 546           doesn't.
 547
 548 config PCI_SYSCALL
 549         def_bool PCI
 550
 551 # Select the host bridge type
 552 config PCI_HOST_VIA82C505
 553         bool
 554         depends on PCI && ARCH_SHARK
 555         default y
 556
 557 source "drivers/pci/Kconfig"
 558
 559 source "drivers/pcmcia/Kconfig"
 560
 561 endmenu
 562
 563 menu "Kernel Features"
 564
 565 source "kernel/time/Kconfig"
 566
 567 config SMP
 568         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 569         depends on EXPERIMENTAL && REALVIEW_MPCORE
 570         help
 571           This enables support for systems with more than one CPU. If you have
 572           a system with only one CPU, like most personal computers, say N. If
 573           you have a system with more than one CPU, say Y.
 574
 575           If you say N here, the kernel will run on single and multiprocessor
 576           machines, but will use only one CPU of a multiprocessor machine. If
 577           you say Y here, the kernel will run on many, but not all, single
 578           processor machines. On a single processor machine, the kernel will
 579           run faster if you say N here.
 580
 581           See also the <file:Documentation/smp.txt>,
 582           <file:Documentation/i386/IO-APIC.txt>,
 583           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 584           <http://www.linuxdoc.org/docs.html#howto>.
 585
 586           If you don't know what to do here, say N.
 587
 588 config NR_CPUS
 589         int "Maximum number of CPUs (2-32)"
 590         range 2 32
 591         depends on SMP
 592         default "4"
 593
 594 config HOTPLUG_CPU
 595         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 596         depends on SMP && HOTPLUG && EXPERIMENTAL
 597         help
 598           Say Y here to experiment with turning CPUs off and on.  CPUs
 599           can be controlled through /sys/devices/system/cpu.
 600
 601 config LOCAL_TIMERS
 602         bool "Use local timer interrupts"
 603         depends on SMP && REALVIEW_MPCORE
 604         default y
 605         help
 606           Enable support for local timers on SMP platforms, rather then the
 607           legacy IPI broadcast method.  Local timers allows the system
 608           accounting to be spread across the timer interval, preventing a
 609           "thundering herd" at every timer tick.
 610
 611 config PREEMPT
 612         bool "Preemptible Kernel (EXPERIMENTAL)"
 613         depends on EXPERIMENTAL
 614         help
 615           This option reduces the latency of the kernel when reacting to
 616           real-time or interactive events by allowing a low priority process to
 617           be preempted even if it is in kernel mode executing a system call.
 618           This allows applications to run more reliably even when the system is
 619           under load.
 620
 621           Say Y here if you are building a kernel for a desktop, embedded
 622           or real-time system.  Say N if you are unsure.
 623
 624 config NO_IDLE_HZ
 625         bool "Dynamic tick timer"
 626         depends on !GENERIC_CLOCKEVENTS
 627         help
 628           Select this option if you want to disable continuous timer ticks
 629           and have them programmed to occur as required. This option saves
 630           power as the system can remain in idle state for longer.
 631
 632           By default dynamic tick is disabled during the boot, and can be
 633           manually enabled with:
 634
 635             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 636
 637           Alternatively, if you want dynamic tick automatically enabled
 638           during boot, pass "dyntick=enable" via the kernel command string.
 639
 640           Please note that dynamic tick may affect the accuracy of
 641           timekeeping on some platforms depending on the implementation.
 642           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 643           to have accurate timekeeping with dynamic tick.
 644
 645 config HZ
 646         int
 647         default 128 if ARCH_L7200
 648         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 649         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 650         default 100
 651
 652 config AEABI
 653         bool "Use the ARM EABI to compile the kernel"
 654         help
 655           This option allows for the kernel to be compiled using the latest
 656           ARM ABI (aka EABI).  This is only useful if you are using a user
 657           space environment that is also compiled with EABI.
 658
 659           Since there are major incompatibilities between the legacy ABI and
 660           EABI, especially with regard to structure member alignment, this
 661           option also changes the kernel syscall calling convention to
 662           disambiguate both ABIs and allow for backward compatibility support
 663           (selected with CONFIG_OABI_COMPAT).
 664
 665           To use this you need GCC version 4.0.0 or later.
 666
 667 config OABI_COMPAT
 668         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 669         depends on AEABI && EXPERIMENTAL
 670         default y
 671         help
 672           This option preserves the old syscall interface along with the
 673           new (ARM EABI) one. It also provides a compatibility layer to
 674           intercept syscalls that have structure arguments which layout
 675           in memory differs between the legacy ABI and the new ARM EABI
 676           (only for non "thumb" binaries). This option adds a tiny
 677           overhead to all syscalls and produces a slightly larger kernel.
 678           If you know you'll be using only pure EABI user space then you
 679           can say N here. If this option is not selected and you attempt
 680           to execute a legacy ABI binary then the result will be
 681           UNPREDICTABLE (in fact it can be predicted that it won't work
 682           at all). If in doubt say Y.
 683
 684 config ARCH_DISCONTIGMEM_ENABLE
 685         bool
 686         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 687         help
 688           Say Y to support efficient handling of discontiguous physical memory,
 689           for architectures which are either NUMA (Non-Uniform Memory Access)
 690           or have huge holes in the physical address space for other reasons.
 691           See <file:Documentation/vm/numa> for more.
 692
 693 config NODES_SHIFT
 694         int
 695         default "4" if ARCH_LH7A40X
 696         default "2"
 697         depends on NEED_MULTIPLE_NODES
 698
 699 source "mm/Kconfig"
 700
 701 config LEDS
 702         bool "Timer and CPU usage LEDs"
 703         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 704                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 705                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 706                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 707                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 708                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 709                    ARCH_KS8695
 710         help
 711           If you say Y here, the LEDs on your machine will be used
 712           to provide useful information about your current system status.
 713
 714           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 715           be able to select which LEDs are active using the options below. If
 716           you are compiling a kernel for the EBSA-110 or the LART however, the
 717           red LED will simply flash regularly to indicate that the system is
 718           still functional. It is safe to say Y here if you have a CATS
 719           system, but the driver will do nothing.
 720
 721 config LEDS_TIMER
 722         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 723                             MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 724         depends on LEDS
 725         depends on !GENERIC_CLOCKEVENTS
 726         default y if ARCH_EBSA110
 727         help
 728           If you say Y here, one of the system LEDs (the green one on the
 729           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 730           will flash regularly to indicate that the system is still
 731           operational. This is mainly useful to kernel hackers who are
 732           debugging unstable kernels.
 733
 734           The LART uses the same LED for both Timer LED and CPU usage LED
 735           functions. You may choose to use both, but the Timer LED function
 736           will overrule the CPU usage LED.
 737
 738 config LEDS_CPU
 739         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 740                         !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 741         depends on LEDS
 742         help
 743           If you say Y here, the red LED will be used to give a good real
 744           time indication of CPU usage, by lighting whenever the idle task
 745           is not currently executing.
 746
 747           The LART uses the same LED for both Timer LED and CPU usage LED
 748           functions. You may choose to use both, but the Timer LED function
 749           will overrule the CPU usage LED.
 750
 751 config ALIGNMENT_TRAP
 752         bool
 753         depends on CPU_CP15_MMU
 754         default y if !ARCH_EBSA110
 755         help
 756           ARM processors cannot fetch/store information which is not
 757           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 758           address divisible by 4. On 32-bit ARM processors, these non-aligned
 759           fetch/store instructions will be emulated in software if you say
 760           here, which has a severe performance impact. This is necessary for
 761           correct operation of some network protocols. With an IP-only
 762           configuration it is safe to say N, otherwise say Y.
 763
 764 endmenu
 765
 766 menu "Boot options"
 767
 768 # Compressed boot loader in ROM.  Yes, we really want to ask about
 769 # TEXT and BSS so we preserve their values in the config files.
 770 config ZBOOT_ROM_TEXT
 771         hex "Compressed ROM boot loader base address"
 772         default "0"
 773         help
 774           The physical address at which the ROM-able zImage is to be
 775           placed in the target.  Platforms which normally make use of
 776           ROM-able zImage formats normally set this to a suitable
 777           value in their defconfig file.
 778
 779           If ZBOOT_ROM is not enabled, this has no effect.
 780
 781 config ZBOOT_ROM_BSS
 782         hex "Compressed ROM boot loader BSS address"
 783         default "0"
 784         help
 785           The base address of an area of read/write memory in the target
 786           for the ROM-able zImage which must be available while the
 787           decompressor is running. It must be large enough to hold the
 788           entire decompressed kernel plus an additional 128 KiB.
 789           Platforms which normally make use of ROM-able zImage formats
 790           normally set this to a suitable value in their defconfig file.
 791
 792           If ZBOOT_ROM is not enabled, this has no effect.
 793
 794 config ZBOOT_ROM
 795         bool "Compressed boot loader in ROM/flash"
 796         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 797         help
 798           Say Y here if you intend to execute your compressed kernel image
 799           (zImage) directly from ROM or flash.  If unsure, say N.
 800
 801 config CMDLINE
 802         string "Default kernel command string"
 803         default ""
 804         help
 805           On some architectures (EBSA110 and CATS), there is currently no way
 806           for the boot loader to pass arguments to the kernel. For these
 807           architectures, you should supply some command-line options at build
 808           time by entering them here. As a minimum, you should specify the
 809           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 810
 811 config XIP_KERNEL
 812         bool "Kernel Execute-In-Place from ROM"
 813         depends on !ZBOOT_ROM
 814         help
 815           Execute-In-Place allows the kernel to run from non-volatile storage
 816           directly addressable by the CPU, such as NOR flash. This saves RAM
 817           space since the text section of the kernel is not loaded from flash
 818           to RAM.  Read-write sections, such as the data section and stack,
 819           are still copied to RAM.  The XIP kernel is not compressed since
 820           it has to run directly from flash, so it will take more space to
 821           store it.  The flash address used to link the kernel object files,
 822           and for storing it, is configuration dependent. Therefore, if you
 823           say Y here, you must know the proper physical address where to
 824           store the kernel image depending on your own flash memory usage.
 825
 826           Also note that the make target becomes "make xipImage" rather than
 827           "make zImage" or "make Image".  The final kernel binary to put in
 828           ROM memory will be arch/arm/boot/xipImage.
 829
 830           If unsure, say N.
 831
 832 config XIP_PHYS_ADDR
 833         hex "XIP Kernel Physical Location"
 834         depends on XIP_KERNEL
 835         default "0x00080000"
 836         help
 837           This is the physical address in your flash memory the kernel will
 838           be linked for and stored to.  This address is dependent on your
 839           own flash usage.
 840
 841 config KEXEC
 842         bool "Kexec system call (EXPERIMENTAL)"
 843         depends on EXPERIMENTAL
 844         help
 845           kexec is a system call that implements the ability to shutdown your
 846           current kernel, and to start another kernel.  It is like a reboot
 847           but it is indepedent of the system firmware.   And like a reboot
 848           you can start any kernel with it, not just Linux.
 849
 850           It is an ongoing process to be certain the hardware in a machine
 851           is properly shutdown, so do not be surprised if this code does not
 852           initially work for you.  It may help to enable device hotplugging
 853           support.
 854
 855 endmenu
 856
 857 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
 858
 859 menu "CPU Frequency scaling"
 860
 861 source "drivers/cpufreq/Kconfig"
 862
 863 config CPU_FREQ_SA1100
 864         bool
 865         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 866         default y
 867
 868 config CPU_FREQ_SA1110
 869         bool
 870         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 871         default y
 872
 873 config CPU_FREQ_INTEGRATOR
 874         tristate "CPUfreq driver for ARM Integrator CPUs"
 875         depends on ARCH_INTEGRATOR && CPU_FREQ
 876         default y
 877         help
 878           This enables the CPUfreq driver for ARM Integrator CPUs.
 879
 880           For details, take a look at <file:Documentation/cpu-freq>.
 881
 882           If in doubt, say Y.
 883
 884 config CPU_FREQ_IMX
 885         tristate "CPUfreq driver for i.MX CPUs"
 886         depends on ARCH_IMX && CPU_FREQ
 887         default n
 888         help
 889           This enables the CPUfreq driver for i.MX CPUs.
 890
 891           If in doubt, say N.
 892
 893 endmenu
 894
 895 endif
 896
 897 menu "Floating point emulation"
 898
 899 comment "At least one emulation must be selected"
 900
 901 config FPE_NWFPE
 902         bool "NWFPE math emulation"
 903         depends on !AEABI || OABI_COMPAT
 904         ---help---
 905           Say Y to include the NWFPE floating point emulator in the kernel.
 906           This is necessary to run most binaries. Linux does not currently
 907           support floating point hardware so you need to say Y here even if
 908           your machine has an FPA or floating point co-processor podule.
 909
 910           You may say N here if you are going to load the Acorn FPEmulator
 911           early in the bootup.
 912
 913 config FPE_NWFPE_XP
 914         bool "Support extended precision"
 915         depends on FPE_NWFPE
 916         help
 917           Say Y to include 80-bit support in the kernel floating-point
 918           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 919           Note that gcc does not generate 80-bit operations by default,
 920           so in most cases this option only enlarges the size of the
 921           floating point emulator without any good reason.
 922
 923           You almost surely want to say N here.
 924
 925 config FPE_FASTFPE
 926         bool "FastFPE math emulation (EXPERIMENTAL)"
 927         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 928         ---help---
 929           Say Y here to include the FAST floating point emulator in the kernel.
 930           This is an experimental much faster emulator which now also has full
 931           precision for the mantissa.  It does not support any exceptions.
 932           It is very simple, and approximately 3-6 times faster than NWFPE.
 933
 934           It should be sufficient for most programs.  It may be not suitable
 935           for scientific calculations, but you have to check this for yourself.
 936           If you do not feel you need a faster FP emulation you should better
 937           choose NWFPE.
 938
 939 config VFP
 940         bool "VFP-format floating point maths"
 941         depends on CPU_V6 || CPU_ARM926T
 942         help
 943           Say Y to include VFP support code in the kernel. This is needed
 944           if your hardware includes a VFP unit.
 945
 946           Please see <file:Documentation/arm/VFP/release-notes.txt> for
 947           release notes and additional status information.
 948
 949           Say N if your target does not have VFP hardware.
 950
 951 endmenu
 952
 953 menu "Userspace binary formats"
 954
 955 source "fs/Kconfig.binfmt"
 956
 957 config ARTHUR
 958         tristate "RISC OS personality"
 959         depends on !AEABI
 960         help
 961           Say Y here to include the kernel code necessary if you want to run
 962           Acorn RISC OS/Arthur binaries under Linux. This code is still very
 963           experimental; if this sounds frightening, say N and sleep in peace.
 964           You can also say M here to compile this support as a module (which
 965           will be called arthur).
 966
 967 endmenu
 968
 969 menu "Power management options"
 970
 971 source "kernel/power/Kconfig"
 972
 973 endmenu
 974
 975 source "net/Kconfig"
 976
 977 menu "Device Drivers"
 978
 979 source "drivers/base/Kconfig"
 980
 981 source "drivers/connector/Kconfig"
 982
 983 if ALIGNMENT_TRAP || !CPU_CP15_MMU
 984 source "drivers/mtd/Kconfig"
 985 endif
 986
 987 source "drivers/parport/Kconfig"
 988
 989 source "drivers/pnp/Kconfig"
 990
 991 source "drivers/block/Kconfig"
 992
 993 source "drivers/acorn/block/Kconfig"
 994
 995 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
 996         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
 997         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
 998         || ARCH_IXP23XX
 999 source "drivers/ide/Kconfig"
1000 endif
1001
1002 source "drivers/scsi/Kconfig"
1003
1004 source "drivers/ata/Kconfig"
1005
1006 source "drivers/md/Kconfig"
1007
1008 source "drivers/message/fusion/Kconfig"
1009
1010 source "drivers/ieee1394/Kconfig"
1011
1012 source "drivers/message/i2o/Kconfig"
1013
1014 source "drivers/net/Kconfig"
1015
1016 source "drivers/isdn/Kconfig"
1017
1018 # input before char - char/joystick depends on it. As does USB.
1019
1020 source "drivers/input/Kconfig"
1021
1022 source "drivers/char/Kconfig"
1023
1024 source "drivers/i2c/Kconfig"
1025
1026 source "drivers/spi/Kconfig"
1027
1028 source "drivers/w1/Kconfig"
1029
1030 source "drivers/hwmon/Kconfig"
1031
1032 #source "drivers/l3/Kconfig"
1033
1034 source "drivers/misc/Kconfig"
1035
1036 source "drivers/mfd/Kconfig"
1037
1038 source "drivers/leds/Kconfig"
1039
1040 source "drivers/media/Kconfig"
1041
1042 source "drivers/video/Kconfig"
1043
1044 source "sound/Kconfig"
1045
1046 source "drivers/hid/Kconfig"
1047
1048 source "drivers/usb/Kconfig"
1049
1050 source "drivers/mmc/Kconfig"
1051
1052 source "drivers/rtc/Kconfig"
1053
1054 source "drivers/dma/Kconfig"
1055
1056 endmenu
1057
1058 source "fs/Kconfig"
1059
1060 source "arch/arm/oprofile/Kconfig"
1061
1062 source "arch/arm/Kconfig.debug"
1063
1064 source "security/Kconfig"
1065
1066 source "crypto/Kconfig"
1067
1068 source "lib/Kconfig"