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/PXA3xx-based"
 340         depends on MMU
 341         select ARCH_MTD_XIP
 342         select GENERIC_GPIO
 343         select GENERIC_TIME
 344         select GENERIC_CLOCKEVENTS
 345         help
 346           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 347
 348 config ARCH_RPC
 349         bool "RiscPC"
 350         select ARCH_ACORN
 351         select FIQ
 352         select TIMER_ACORN
 353         select ARCH_MAY_HAVE_PC_FDC
 354         select ISA_DMA_API
 355         select NO_IOPORT
 356         help
 357           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 358           CD-ROM interface, serial and parallel port, and the floppy drive.
 359
 360 config ARCH_SA1100
 361         bool "SA1100-based"
 362         select ISA
 363         select ARCH_DISCONTIGMEM_ENABLE
 364         select ARCH_MTD_XIP
 365         select GENERIC_GPIO
 366         help
 367           Support for StrongARM 11x0 based boards.
 368
 369 config ARCH_S3C2410
 370         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 371         select GENERIC_GPIO
 372         help
 373           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 374           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 375           the Samsung SMDK2410 development board (and derivatives).
 376
 377 config ARCH_SHARK
 378         bool "Shark"
 379         select ISA
 380         select ISA_DMA
 381         select PCI
 382         help
 383           Support for the StrongARM based Digital DNARD machine, also known
 384           as "Shark" (<http://www.shark-linux.de/shark.html>).
 385
 386 config ARCH_LH7A40X
 387         bool "Sharp LH7A40X"
 388         help
 389           Say Y here for systems based on one of the Sharp LH7A40X
 390           System on a Chip processors.  These CPUs include an ARM922T
 391           core with a wide array of integrated devices for
 392           hand-held and low-power applications.
 393
 394 config ARCH_DAVINCI
 395         bool "TI DaVinci"
 396         select GENERIC_TIME
 397         select GENERIC_CLOCKEVENTS
 398         select GENERIC_GPIO
 399         help
 400           Support for TI's DaVinci platform.
 401
 402 config ARCH_OMAP
 403         bool "TI OMAP"
 404         select GENERIC_GPIO
 405         select GENERIC_TIME
 406         help
 407           Support for TI's OMAP platform (OMAP1 and OMAP2).
 408
 409 endchoice
 410
 411 source "arch/arm/mach-clps711x/Kconfig"
 412
 413 source "arch/arm/mach-ep93xx/Kconfig"
 414
 415 source "arch/arm/mach-footbridge/Kconfig"
 416
 417 source "arch/arm/mach-integrator/Kconfig"
 418
 419 source "arch/arm/mach-iop32x/Kconfig"
 420
 421 source "arch/arm/mach-iop33x/Kconfig"
 422
 423 source "arch/arm/mach-iop13xx/Kconfig"
 424
 425 source "arch/arm/mach-ixp4xx/Kconfig"
 426
 427 source "arch/arm/mach-ixp2000/Kconfig"
 428
 429 source "arch/arm/mach-ixp23xx/Kconfig"
 430
 431 source "arch/arm/mach-pxa/Kconfig"
 432
 433 source "arch/arm/mach-sa1100/Kconfig"
 434
 435 source "arch/arm/plat-omap/Kconfig"
 436
 437 source "arch/arm/mach-omap1/Kconfig"
 438
 439 source "arch/arm/mach-omap2/Kconfig"
 440
 441 source "arch/arm/plat-s3c24xx/Kconfig"
 442 source "arch/arm/plat-s3c/Kconfig"
 443
 444 if ARCH_S3C2410
 445 source "arch/arm/mach-s3c2400/Kconfig"
 446 source "arch/arm/mach-s3c2410/Kconfig"
 447 source "arch/arm/mach-s3c2412/Kconfig"
 448 source "arch/arm/mach-s3c2440/Kconfig"
 449 source "arch/arm/mach-s3c2442/Kconfig"
 450 source "arch/arm/mach-s3c2443/Kconfig"
 451 endif
 452
 453 source "arch/arm/mach-lh7a40x/Kconfig"
 454
 455 source "arch/arm/mach-imx/Kconfig"
 456
 457 source "arch/arm/mach-h720x/Kconfig"
 458
 459 source "arch/arm/mach-versatile/Kconfig"
 460
 461 source "arch/arm/mach-aaec2000/Kconfig"
 462
 463 source "arch/arm/mach-realview/Kconfig"
 464
 465 source "arch/arm/mach-at91/Kconfig"
 466
 467 source "arch/arm/plat-mxc/Kconfig"
 468
 469 source "arch/arm/mach-netx/Kconfig"
 470
 471 source "arch/arm/mach-ns9xxx/Kconfig"
 472
 473 source "arch/arm/mach-davinci/Kconfig"
 474
 475 source "arch/arm/mach-ks8695/Kconfig"
 476
 477 # Definitions to make life easier
 478 config ARCH_ACORN
 479         bool
 480
 481 config PLAT_IOP
 482         bool
 483
 484 source arch/arm/mm/Kconfig
 485
 486 config IWMMXT
 487         bool "Enable iWMMXt support"
 488         depends on CPU_XSCALE || CPU_XSC3
 489         default y if PXA27x || PXA3xx
 490         help
 491           Enable support for iWMMXt context switching at run time if
 492           running on a CPU that supports it.
 493
 494 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 495 config XSCALE_PMU
 496         bool
 497         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 498         default y
 499
 500 if !MMU
 501 source "arch/arm/Kconfig-nommu"
 502 endif
 503
 504 endmenu
 505
 506 source "arch/arm/common/Kconfig"
 507
 508 config FORCE_MAX_ZONEORDER
 509         int
 510         depends on SA1111
 511         default "9"
 512
 513 menu "Bus support"
 514
 515 config ARM_AMBA
 516         bool
 517
 518 config ISA
 519         bool
 520         help
 521           Find out whether you have ISA slots on your motherboard.  ISA is the
 522           name of a bus system, i.e. the way the CPU talks to the other stuff
 523           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 524           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 525           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 526
 527 # Select ISA DMA controller support
 528 config ISA_DMA
 529         bool
 530         select ISA_DMA_API
 531
 532 # Select ISA DMA interface
 533 config ISA_DMA_API
 534         bool
 535
 536 config PCI
 537         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695
 538         help
 539           Find out whether you have a PCI motherboard. PCI is the name of a
 540           bus system, i.e. the way the CPU talks to the other stuff inside
 541           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 542           VESA. If you have PCI, say Y, otherwise N.
 543
 544           The PCI-HOWTO, available from
 545           <http://www.tldp.org/docs.html#howto>, contains valuable
 546           information about which PCI hardware does work under Linux and which
 547           doesn't.
 548
 549 config PCI_SYSCALL
 550         def_bool PCI
 551
 552 # Select the host bridge type
 553 config PCI_HOST_VIA82C505
 554         bool
 555         depends on PCI && ARCH_SHARK
 556         default y
 557
 558 source "drivers/pci/Kconfig"
 559
 560 source "drivers/pcmcia/Kconfig"
 561
 562 endmenu
 563
 564 menu "Kernel Features"
 565
 566 source "kernel/time/Kconfig"
 567
 568 config SMP
 569         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 570         depends on EXPERIMENTAL && REALVIEW_MPCORE
 571         help
 572           This enables support for systems with more than one CPU. If you have
 573           a system with only one CPU, like most personal computers, say N. If
 574           you have a system with more than one CPU, say Y.
 575
 576           If you say N here, the kernel will run on single and multiprocessor
 577           machines, but will use only one CPU of a multiprocessor machine. If
 578           you say Y here, the kernel will run on many, but not all, single
 579           processor machines. On a single processor machine, the kernel will
 580           run faster if you say N here.
 581
 582           See also the <file:Documentation/smp.txt>,
 583           <file:Documentation/i386/IO-APIC.txt>,
 584           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 585           <http://www.linuxdoc.org/docs.html#howto>.
 586
 587           If you don't know what to do here, say N.
 588
 589 config NR_CPUS
 590         int "Maximum number of CPUs (2-32)"
 591         range 2 32
 592         depends on SMP
 593         default "4"
 594
 595 config HOTPLUG_CPU
 596         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 597         depends on SMP && HOTPLUG && EXPERIMENTAL
 598         help
 599           Say Y here to experiment with turning CPUs off and on.  CPUs
 600           can be controlled through /sys/devices/system/cpu.
 601
 602 config LOCAL_TIMERS
 603         bool "Use local timer interrupts"
 604         depends on SMP && REALVIEW_MPCORE
 605         default y
 606         help
 607           Enable support for local timers on SMP platforms, rather then the
 608           legacy IPI broadcast method.  Local timers allows the system
 609           accounting to be spread across the timer interval, preventing a
 610           "thundering herd" at every timer tick.
 611
 612 config PREEMPT
 613         bool "Preemptible Kernel (EXPERIMENTAL)"
 614         depends on EXPERIMENTAL
 615         help
 616           This option reduces the latency of the kernel when reacting to
 617           real-time or interactive events by allowing a low priority process to
 618           be preempted even if it is in kernel mode executing a system call.
 619           This allows applications to run more reliably even when the system is
 620           under load.
 621
 622           Say Y here if you are building a kernel for a desktop, embedded
 623           or real-time system.  Say N if you are unsure.
 624
 625 config NO_IDLE_HZ
 626         bool "Dynamic tick timer"
 627         depends on !GENERIC_CLOCKEVENTS
 628         help
 629           Select this option if you want to disable continuous timer ticks
 630           and have them programmed to occur as required. This option saves
 631           power as the system can remain in idle state for longer.
 632
 633           By default dynamic tick is disabled during the boot, and can be
 634           manually enabled with:
 635
 636             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 637
 638           Alternatively, if you want dynamic tick automatically enabled
 639           during boot, pass "dyntick=enable" via the kernel command string.
 640
 641           Please note that dynamic tick may affect the accuracy of
 642           timekeeping on some platforms depending on the implementation.
 643           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 644           to have accurate timekeeping with dynamic tick.
 645
 646 config HZ
 647         int
 648         default 128 if ARCH_L7200
 649         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 650         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 651         default 100
 652
 653 config AEABI
 654         bool "Use the ARM EABI to compile the kernel"
 655         help
 656           This option allows for the kernel to be compiled using the latest
 657           ARM ABI (aka EABI).  This is only useful if you are using a user
 658           space environment that is also compiled with EABI.
 659
 660           Since there are major incompatibilities between the legacy ABI and
 661           EABI, especially with regard to structure member alignment, this
 662           option also changes the kernel syscall calling convention to
 663           disambiguate both ABIs and allow for backward compatibility support
 664           (selected with CONFIG_OABI_COMPAT).
 665
 666           To use this you need GCC version 4.0.0 or later.
 667
 668 config OABI_COMPAT
 669         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 670         depends on AEABI && EXPERIMENTAL
 671         default y
 672         help
 673           This option preserves the old syscall interface along with the
 674           new (ARM EABI) one. It also provides a compatibility layer to
 675           intercept syscalls that have structure arguments which layout
 676           in memory differs between the legacy ABI and the new ARM EABI
 677           (only for non "thumb" binaries). This option adds a tiny
 678           overhead to all syscalls and produces a slightly larger kernel.
 679           If you know you'll be using only pure EABI user space then you
 680           can say N here. If this option is not selected and you attempt
 681           to execute a legacy ABI binary then the result will be
 682           UNPREDICTABLE (in fact it can be predicted that it won't work
 683           at all). If in doubt say Y.
 684
 685 config ARCH_DISCONTIGMEM_ENABLE
 686         bool
 687         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 688         help
 689           Say Y to support efficient handling of discontiguous physical memory,
 690           for architectures which are either NUMA (Non-Uniform Memory Access)
 691           or have huge holes in the physical address space for other reasons.
 692           See <file:Documentation/vm/numa> for more.
 693
 694 config NODES_SHIFT
 695         int
 696         default "4" if ARCH_LH7A40X
 697         default "2"
 698         depends on NEED_MULTIPLE_NODES
 699
 700 source "mm/Kconfig"
 701
 702 config LEDS
 703         bool "Timer and CPU usage LEDs"
 704         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 705                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 706                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 707                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 708                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 709                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 710                    ARCH_KS8695
 711         help
 712           If you say Y here, the LEDs on your machine will be used
 713           to provide useful information about your current system status.
 714
 715           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 716           be able to select which LEDs are active using the options below. If
 717           you are compiling a kernel for the EBSA-110 or the LART however, the
 718           red LED will simply flash regularly to indicate that the system is
 719           still functional. It is safe to say Y here if you have a CATS
 720           system, but the driver will do nothing.
 721
 722 config LEDS_TIMER
 723         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 724                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 725                             || MACH_OMAP_PERSEUS2
 726         depends on LEDS
 727         depends on !GENERIC_CLOCKEVENTS
 728         default y if ARCH_EBSA110
 729         help
 730           If you say Y here, one of the system LEDs (the green one on the
 731           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 732           will flash regularly to indicate that the system is still
 733           operational. This is mainly useful to kernel hackers who are
 734           debugging unstable kernels.
 735
 736           The LART uses the same LED for both Timer LED and CPU usage LED
 737           functions. You may choose to use both, but the Timer LED function
 738           will overrule the CPU usage LED.
 739
 740 config LEDS_CPU
 741         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 742                         !ARCH_OMAP) \
 743                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 744                         || MACH_OMAP_PERSEUS2
 745         depends on LEDS
 746         help
 747           If you say Y here, the red LED will be used to give a good real
 748           time indication of CPU usage, by lighting whenever the idle task
 749           is not currently executing.
 750
 751           The LART uses the same LED for both Timer LED and CPU usage LED
 752           functions. You may choose to use both, but the Timer LED function
 753           will overrule the CPU usage LED.
 754
 755 config ALIGNMENT_TRAP
 756         bool
 757         depends on CPU_CP15_MMU
 758         default y if !ARCH_EBSA110
 759         help
 760           ARM processors cannot fetch/store information which is not
 761           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 762           address divisible by 4. On 32-bit ARM processors, these non-aligned
 763           fetch/store instructions will be emulated in software if you say
 764           here, which has a severe performance impact. This is necessary for
 765           correct operation of some network protocols. With an IP-only
 766           configuration it is safe to say N, otherwise say Y.
 767
 768 endmenu
 769
 770 menu "Boot options"
 771
 772 # Compressed boot loader in ROM.  Yes, we really want to ask about
 773 # TEXT and BSS so we preserve their values in the config files.
 774 config ZBOOT_ROM_TEXT
 775         hex "Compressed ROM boot loader base address"
 776         default "0"
 777         help
 778           The physical address at which the ROM-able zImage is to be
 779           placed in the target.  Platforms which normally make use of
 780           ROM-able zImage formats normally set this to a suitable
 781           value in their defconfig file.
 782
 783           If ZBOOT_ROM is not enabled, this has no effect.
 784
 785 config ZBOOT_ROM_BSS
 786         hex "Compressed ROM boot loader BSS address"
 787         default "0"
 788         help
 789           The base address of an area of read/write memory in the target
 790           for the ROM-able zImage which must be available while the
 791           decompressor is running. It must be large enough to hold the
 792           entire decompressed kernel plus an additional 128 KiB.
 793           Platforms which normally make use of ROM-able zImage formats
 794           normally set this to a suitable value in their defconfig file.
 795
 796           If ZBOOT_ROM is not enabled, this has no effect.
 797
 798 config ZBOOT_ROM
 799         bool "Compressed boot loader in ROM/flash"
 800         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 801         help
 802           Say Y here if you intend to execute your compressed kernel image
 803           (zImage) directly from ROM or flash.  If unsure, say N.
 804
 805 config CMDLINE
 806         string "Default kernel command string"
 807         default ""
 808         help
 809           On some architectures (EBSA110 and CATS), there is currently no way
 810           for the boot loader to pass arguments to the kernel. For these
 811           architectures, you should supply some command-line options at build
 812           time by entering them here. As a minimum, you should specify the
 813           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 814
 815 config XIP_KERNEL
 816         bool "Kernel Execute-In-Place from ROM"
 817         depends on !ZBOOT_ROM
 818         help
 819           Execute-In-Place allows the kernel to run from non-volatile storage
 820           directly addressable by the CPU, such as NOR flash. This saves RAM
 821           space since the text section of the kernel is not loaded from flash
 822           to RAM.  Read-write sections, such as the data section and stack,
 823           are still copied to RAM.  The XIP kernel is not compressed since
 824           it has to run directly from flash, so it will take more space to
 825           store it.  The flash address used to link the kernel object files,
 826           and for storing it, is configuration dependent. Therefore, if you
 827           say Y here, you must know the proper physical address where to
 828           store the kernel image depending on your own flash memory usage.
 829
 830           Also note that the make target becomes "make xipImage" rather than
 831           "make zImage" or "make Image".  The final kernel binary to put in
 832           ROM memory will be arch/arm/boot/xipImage.
 833
 834           If unsure, say N.
 835
 836 config XIP_PHYS_ADDR
 837         hex "XIP Kernel Physical Location"
 838         depends on XIP_KERNEL
 839         default "0x00080000"
 840         help
 841           This is the physical address in your flash memory the kernel will
 842           be linked for and stored to.  This address is dependent on your
 843           own flash usage.
 844
 845 config KEXEC
 846         bool "Kexec system call (EXPERIMENTAL)"
 847         depends on EXPERIMENTAL
 848         help
 849           kexec is a system call that implements the ability to shutdown your
 850           current kernel, and to start another kernel.  It is like a reboot
 851           but it is indepedent of the system firmware.   And like a reboot
 852           you can start any kernel with it, not just Linux.
 853
 854           It is an ongoing process to be certain the hardware in a machine
 855           is properly shutdown, so do not be surprised if this code does not
 856           initially work for you.  It may help to enable device hotplugging
 857           support.
 858
 859 endmenu
 860
 861 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
 862
 863 menu "CPU Frequency scaling"
 864
 865 source "drivers/cpufreq/Kconfig"
 866
 867 config CPU_FREQ_SA1100
 868         bool
 869         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 870         default y
 871
 872 config CPU_FREQ_SA1110
 873         bool
 874         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 875         default y
 876
 877 config CPU_FREQ_INTEGRATOR
 878         tristate "CPUfreq driver for ARM Integrator CPUs"
 879         depends on ARCH_INTEGRATOR && CPU_FREQ
 880         default y
 881         help
 882           This enables the CPUfreq driver for ARM Integrator CPUs.
 883
 884           For details, take a look at <file:Documentation/cpu-freq>.
 885
 886           If in doubt, say Y.
 887
 888 config CPU_FREQ_IMX
 889         tristate "CPUfreq driver for i.MX CPUs"
 890         depends on ARCH_IMX && CPU_FREQ
 891         default n
 892         help
 893           This enables the CPUfreq driver for i.MX CPUs.
 894
 895           If in doubt, say N.
 896
 897 endmenu
 898
 899 endif
 900
 901 menu "Floating point emulation"
 902
 903 comment "At least one emulation must be selected"
 904
 905 config FPE_NWFPE
 906         bool "NWFPE math emulation"
 907         depends on !AEABI || OABI_COMPAT
 908         ---help---
 909           Say Y to include the NWFPE floating point emulator in the kernel.
 910           This is necessary to run most binaries. Linux does not currently
 911           support floating point hardware so you need to say Y here even if
 912           your machine has an FPA or floating point co-processor podule.
 913
 914           You may say N here if you are going to load the Acorn FPEmulator
 915           early in the bootup.
 916
 917 config FPE_NWFPE_XP
 918         bool "Support extended precision"
 919         depends on FPE_NWFPE
 920         help
 921           Say Y to include 80-bit support in the kernel floating-point
 922           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 923           Note that gcc does not generate 80-bit operations by default,
 924           so in most cases this option only enlarges the size of the
 925           floating point emulator without any good reason.
 926
 927           You almost surely want to say N here.
 928
 929 config FPE_FASTFPE
 930         bool "FastFPE math emulation (EXPERIMENTAL)"
 931         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 932         ---help---
 933           Say Y here to include the FAST floating point emulator in the kernel.
 934           This is an experimental much faster emulator which now also has full
 935           precision for the mantissa.  It does not support any exceptions.
 936           It is very simple, and approximately 3-6 times faster than NWFPE.
 937
 938           It should be sufficient for most programs.  It may be not suitable
 939           for scientific calculations, but you have to check this for yourself.
 940           If you do not feel you need a faster FP emulation you should better
 941           choose NWFPE.
 942
 943 config VFP
 944         bool "VFP-format floating point maths"
 945         depends on CPU_V6 || CPU_ARM926T
 946         help
 947           Say Y to include VFP support code in the kernel. This is needed
 948           if your hardware includes a VFP unit.
 949
 950           Please see <file:Documentation/arm/VFP/release-notes.txt> for
 951           release notes and additional status information.
 952
 953           Say N if your target does not have VFP hardware.
 954
 955 endmenu
 956
 957 menu "Userspace binary formats"
 958
 959 source "fs/Kconfig.binfmt"
 960
 961 config ARTHUR
 962         tristate "RISC OS personality"
 963         depends on !AEABI
 964         help
 965           Say Y here to include the kernel code necessary if you want to run
 966           Acorn RISC OS/Arthur binaries under Linux. This code is still very
 967           experimental; if this sounds frightening, say N and sleep in peace.
 968           You can also say M here to compile this support as a module (which
 969           will be called arthur).
 970
 971 endmenu
 972
 973 menu "Power management options"
 974
 975 source "kernel/power/Kconfig"
 976
 977 endmenu
 978
 979 source "net/Kconfig"
 980
 981 menu "Device Drivers"
 982
 983 source "drivers/base/Kconfig"
 984
 985 source "drivers/connector/Kconfig"
 986
 987 if ALIGNMENT_TRAP || !CPU_CP15_MMU
 988 source "drivers/mtd/Kconfig"
 989 endif
 990
 991 source "drivers/parport/Kconfig"
 992
 993 source "drivers/pnp/Kconfig"
 994
 995 source "drivers/block/Kconfig"
 996
 997 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
 998         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
 999         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
1000         || ARCH_IXP23XX
1001 source "drivers/ide/Kconfig"
1002 endif
1003
1004 source "drivers/scsi/Kconfig"
1005
1006 source "drivers/ata/Kconfig"
1007
1008 source "drivers/md/Kconfig"
1009
1010 source "drivers/message/fusion/Kconfig"
1011
1012 source "drivers/ieee1394/Kconfig"
1013
1014 source "drivers/message/i2o/Kconfig"
1015
1016 source "drivers/net/Kconfig"
1017
1018 source "drivers/isdn/Kconfig"
1019
1020 # input before char - char/joystick depends on it. As does USB.
1021
1022 source "drivers/input/Kconfig"
1023
1024 source "drivers/char/Kconfig"
1025
1026 source "drivers/i2c/Kconfig"
1027
1028 source "drivers/spi/Kconfig"
1029
1030 source "drivers/w1/Kconfig"
1031
1032 source "drivers/hwmon/Kconfig"
1033
1034 #source "drivers/l3/Kconfig"
1035
1036 source "drivers/misc/Kconfig"
1037
1038 source "drivers/mfd/Kconfig"
1039
1040 source "drivers/leds/Kconfig"
1041
1042 source "drivers/media/Kconfig"
1043
1044 source "drivers/video/Kconfig"
1045
1046 source "sound/Kconfig"
1047
1048 source "drivers/hid/Kconfig"
1049
1050 source "drivers/usb/Kconfig"
1051
1052 source "drivers/mmc/Kconfig"
1053
1054 source "drivers/rtc/Kconfig"
1055
1056 source "drivers/dma/Kconfig"
1057
1058 endmenu
1059
1060 source "fs/Kconfig"
1061
1062 source "arch/arm/oprofile/Kconfig"
1063
1064 source "arch/arm/Kconfig.debug"
1065
1066 source "security/Kconfig"
1067
1068 source "crypto/Kconfig"
1069
1070 source "lib/Kconfig"