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         help
  13           The ARM series is a line of low-power-consumption RISC chip designs
  14           licensed by ARM Ltd and targeted at embedded applications and
  15           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  16           manufactured, but legacy ARM-based PC hardware remains popular in
  17           Europe.  There is an ARM Linux project with a web page at
  18           <http://www.arm.linux.org.uk/>.
  19
  20 config MMU
  21         bool
  22         default y
  23
  24 config EISA
  25         bool
  26         ---help---
  27           The Extended Industry Standard Architecture (EISA) bus was
  28           developed as an open alternative to the IBM MicroChannel bus.
  29
  30           The EISA bus provided some of the features of the IBM MicroChannel
  31           bus while maintaining backward compatibility with cards made for
  32           the older ISA bus.  The EISA bus saw limited use between 1988 and
  33           1995 when it was made obsolete by the PCI bus.
  34
  35           Say Y here if you are building a kernel for an EISA-based machine.
  36
  37           Otherwise, say N.
  38
  39 config SBUS
  40         bool
  41
  42 config MCA
  43         bool
  44         help
  45           MicroChannel Architecture is found in some IBM PS/2 machines and
  46           laptops.  It is a bus system similar to PCI or ISA. See
  47           <file:Documentation/mca.txt> (and especially the web page given
  48           there) before attempting to build an MCA bus kernel.
  49
  50 config RWSEM_GENERIC_SPINLOCK
  51         bool
  52         default y
  53
  54 config RWSEM_XCHGADD_ALGORITHM
  55         bool
  56
  57 config GENERIC_HWEIGHT
  58         bool
  59         default y
  60
  61 config GENERIC_CALIBRATE_DELAY
  62         bool
  63         default y
  64
  65 config GENERIC_BUST_SPINLOCK
  66         bool
  67
  68 config ARCH_MAY_HAVE_PC_FDC
  69         bool
  70
  71 config GENERIC_ISA_DMA
  72         bool
  73
  74 config FIQ
  75         bool
  76
  77 config ARCH_MTD_XIP
  78         bool
  79
  80 config VECTORS_BASE
  81         hex
  82         default 0xffff0000 if MMU
  83         default DRAM_BASE if REMAP_VECTORS_TO_RAM
  84         default 0x00000000
  85         help
  86           The base address of exception vectors.
  87
  88 source "init/Kconfig"
  89
  90 menu "System Type"
  91
  92 choice
  93         prompt "ARM system type"
  94         default ARCH_VERSATILE
  95
  96 config ARCH_CLPS7500
  97         bool "Cirrus-CL-PS7500FE"
  98         select TIMER_ACORN
  99         select ISA
 100         help
 101           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 102
 103 config ARCH_CLPS711X
 104         bool "CLPS711x/EP721x-based"
 105         help
 106           Support for Cirrus Logic 711x/721x based boards.
 107
 108 config ARCH_CO285
 109         bool "Co-EBSA285"
 110         select FOOTBRIDGE
 111         select FOOTBRIDGE_ADDIN
 112         help
 113           Support for Intel's EBSA285 companion chip.
 114
 115 config ARCH_EBSA110
 116         bool "EBSA-110"
 117         select ISA
 118         help
 119           This is an evaluation board for the StrongARM processor available
 120           from Digital. It has limited hardware on-board, including an
 121           Ethernet interface, two PCMCIA sockets, two serial ports and a
 122           parallel port.
 123
 124 config ARCH_EP93XX
 125         bool "EP93xx-based"
 126         select ARM_AMBA
 127         select ARM_VIC
 128         help
 129           This enables support for the Cirrus EP93xx series of CPUs.
 130
 131 config ARCH_FOOTBRIDGE
 132         bool "FootBridge"
 133         select FOOTBRIDGE
 134         help
 135           Support for systems based on the DC21285 companion chip
 136           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 137
 138 config ARCH_INTEGRATOR
 139         bool "Integrator"
 140         select ARM_AMBA
 141         select ICST525
 142         help
 143           Support for ARM's Integrator platform.
 144
 145 config ARCH_IOP3XX
 146         bool "IOP3xx-based"
 147         select PCI
 148         help
 149           Support for Intel's IOP3XX (XScale) family of processors.
 150
 151 config ARCH_IXP4XX
 152         bool "IXP4xx-based"
 153         select DMABOUNCE
 154         select PCI
 155         help
 156           Support for Intel's IXP4XX (XScale) family of processors.
 157
 158 config ARCH_IXP2000
 159         bool "IXP2400/2800-based"
 160         select PCI
 161         help
 162           Support for Intel's IXP2400/2800 (XScale) family of processors.
 163
 164 config ARCH_IXP23XX
 165         bool "IXP23XX-based"
 166         select PCI
 167         help
 168           Support for Intel's IXP23xx (XScale) family of processors.
 169
 170 config ARCH_L7200
 171         bool "LinkUp-L7200"
 172         select FIQ
 173         help
 174           Say Y here if you intend to run this kernel on a LinkUp Systems
 175           L7200 Software Development Board which uses an ARM720T processor.
 176           Information on this board can be obtained at:
 177
 178           <http://www.linkupsys.com/>
 179
 180           If you have any questions or comments about the Linux kernel port
 181           to this board, send e-mail to <sjhill@cotw.com>.
 182
 183 config ARCH_PXA
 184         bool "PXA2xx-based"
 185         select ARCH_MTD_XIP
 186         help
 187           Support for Intel's PXA2XX processor line.
 188
 189 config ARCH_RPC
 190         bool "RiscPC"
 191         select ARCH_ACORN
 192         select FIQ
 193         select TIMER_ACORN
 194         select ARCH_MAY_HAVE_PC_FDC
 195         select ISA_DMA_API
 196         help
 197           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 198           CD-ROM interface, serial and parallel port, and the floppy drive.
 199
 200 config ARCH_SA1100
 201         bool "SA1100-based"
 202         select ISA
 203         select ARCH_DISCONTIGMEM_ENABLE
 204         select ARCH_MTD_XIP
 205         help
 206           Support for StrongARM 11x0 based boards.
 207
 208 config ARCH_S3C2410
 209         bool "Samsung S3C2410"
 210         help
 211           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 212           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 213           the Samsung SMDK2410 development board (and derivatives).
 214
 215 config ARCH_SHARK
 216         bool "Shark"
 217         select ISA
 218         select ISA_DMA
 219         select PCI
 220         help
 221           Support for the StrongARM based Digital DNARD machine, also known
 222           as "Shark" (<http://www.shark-linux.de/shark.html>).
 223
 224 config ARCH_LH7A40X
 225         bool "Sharp LH7A40X"
 226         help
 227           Say Y here for systems based on one of the Sharp LH7A40X
 228           System on a Chip processors.  These CPUs include an ARM922T
 229           core with a wide array of integrated devices for
 230           hand-held and low-power applications.
 231
 232 config ARCH_OMAP
 233         bool "TI OMAP"
 234         help
 235           Support for TI's OMAP platform (OMAP1 and OMAP2).
 236
 237 config ARCH_VERSATILE
 238         bool "Versatile"
 239         select ARM_AMBA
 240         select ARM_VIC
 241         select ICST307
 242         help
 243           This enables support for ARM Ltd Versatile board.
 244
 245 config ARCH_REALVIEW
 246         bool "RealView"
 247         select ARM_AMBA
 248         select ICST307
 249         help
 250           This enables support for ARM Ltd RealView boards.
 251
 252 config ARCH_IMX
 253         bool "IMX"
 254         help
 255           Support for Motorola's i.MX family of processors (MX1, MXL).
 256
 257 config ARCH_H720X
 258         bool "Hynix-HMS720x-based"
 259         select ISA_DMA_API
 260         help
 261           This enables support for systems based on the Hynix HMS720x
 262
 263 config ARCH_AAEC2000
 264         bool "Agilent AAEC-2000 based"
 265         select ARM_AMBA
 266         help
 267           This enables support for systems based on the Agilent AAEC-2000
 268
 269 config ARCH_AT91RM9200
 270         bool "AT91RM9200"
 271         help
 272           Say Y here if you intend to run this kernel on an Atmel
 273           AT91RM9200-based board.
 274
 275 endchoice
 276
 277 source "arch/arm/mach-clps711x/Kconfig"
 278
 279 source "arch/arm/mach-ep93xx/Kconfig"
 280
 281 source "arch/arm/mach-footbridge/Kconfig"
 282
 283 source "arch/arm/mach-integrator/Kconfig"
 284
 285 source "arch/arm/mach-iop3xx/Kconfig"
 286
 287 source "arch/arm/mach-ixp4xx/Kconfig"
 288
 289 source "arch/arm/mach-ixp2000/Kconfig"
 290
 291 source "arch/arm/mach-ixp23xx/Kconfig"
 292
 293 source "arch/arm/mach-pxa/Kconfig"
 294
 295 source "arch/arm/mach-sa1100/Kconfig"
 296
 297 source "arch/arm/plat-omap/Kconfig"
 298
 299 source "arch/arm/mach-omap1/Kconfig"
 300
 301 source "arch/arm/mach-omap2/Kconfig"
 302
 303 source "arch/arm/mach-s3c2410/Kconfig"
 304
 305 source "arch/arm/mach-lh7a40x/Kconfig"
 306
 307 source "arch/arm/mach-imx/Kconfig"
 308
 309 source "arch/arm/mach-h720x/Kconfig"
 310
 311 source "arch/arm/mach-versatile/Kconfig"
 312
 313 source "arch/arm/mach-aaec2000/Kconfig"
 314
 315 source "arch/arm/mach-realview/Kconfig"
 316
 317 source "arch/arm/mach-at91rm9200/Kconfig"
 318
 319 # Definitions to make life easier
 320 config ARCH_ACORN
 321         bool
 322
 323 source arch/arm/mm/Kconfig
 324
 325 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 326 config XSCALE_PMU
 327         bool
 328         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 329         default y
 330
 331 endmenu
 332
 333 source "arch/arm/common/Kconfig"
 334
 335 config FORCE_MAX_ZONEORDER
 336         int
 337         depends on SA1111
 338         default "9"
 339
 340 menu "Bus support"
 341
 342 config ARM_AMBA
 343         bool
 344
 345 config ISA
 346         bool
 347         help
 348           Find out whether you have ISA slots on your motherboard.  ISA is the
 349           name of a bus system, i.e. the way the CPU talks to the other stuff
 350           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 351           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 352           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 353
 354 # Select ISA DMA controller support
 355 config ISA_DMA
 356         bool
 357         select ISA_DMA_API
 358
 359 # Select ISA DMA interface
 360 config ISA_DMA_API
 361         bool
 362
 363 config PCI
 364         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB
 365         help
 366           Find out whether you have a PCI motherboard. PCI is the name of a
 367           bus system, i.e. the way the CPU talks to the other stuff inside
 368           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 369           VESA. If you have PCI, say Y, otherwise N.
 370
 371           The PCI-HOWTO, available from
 372           <http://www.tldp.org/docs.html#howto>, contains valuable
 373           information about which PCI hardware does work under Linux and which
 374           doesn't.
 375
 376 # Select the host bridge type
 377 config PCI_HOST_VIA82C505
 378         bool
 379         depends on PCI && ARCH_SHARK
 380         default y
 381
 382 source "drivers/pci/Kconfig"
 383
 384 source "drivers/pcmcia/Kconfig"
 385
 386 endmenu
 387
 388 menu "Kernel Features"
 389
 390 config SMP
 391         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 392         depends on EXPERIMENTAL && REALVIEW_MPCORE
 393         help
 394           This enables support for systems with more than one CPU. If you have
 395           a system with only one CPU, like most personal computers, say N. If
 396           you have a system with more than one CPU, say Y.
 397
 398           If you say N here, the kernel will run on single and multiprocessor
 399           machines, but will use only one CPU of a multiprocessor machine. If
 400           you say Y here, the kernel will run on many, but not all, single
 401           processor machines. On a single processor machine, the kernel will
 402           run faster if you say N here.
 403
 404           See also the <file:Documentation/smp.txt>,
 405           <file:Documentation/i386/IO-APIC.txt>,
 406           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 407           <http://www.linuxdoc.org/docs.html#howto>.
 408
 409           If you don't know what to do here, say N.
 410
 411 config NR_CPUS
 412         int "Maximum number of CPUs (2-32)"
 413         range 2 32
 414         depends on SMP
 415         default "4"
 416
 417 config HOTPLUG_CPU
 418         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 419         depends on SMP && HOTPLUG && EXPERIMENTAL
 420         help
 421           Say Y here to experiment with turning CPUs off and on.  CPUs
 422           can be controlled through /sys/devices/system/cpu.
 423
 424 config LOCAL_TIMERS
 425         bool "Use local timer interrupts"
 426         depends on SMP && REALVIEW_MPCORE
 427         default y
 428         help
 429           Enable support for local timers on SMP platforms, rather then the
 430           legacy IPI broadcast method.  Local timers allows the system
 431           accounting to be spread across the timer interval, preventing a
 432           "thundering herd" at every timer tick.
 433
 434 config PREEMPT
 435         bool "Preemptible Kernel (EXPERIMENTAL)"
 436         depends on EXPERIMENTAL
 437         help
 438           This option reduces the latency of the kernel when reacting to
 439           real-time or interactive events by allowing a low priority process to
 440           be preempted even if it is in kernel mode executing a system call.
 441           This allows applications to run more reliably even when the system is
 442           under load.
 443
 444           Say Y here if you are building a kernel for a desktop, embedded
 445           or real-time system.  Say N if you are unsure.
 446
 447 config NO_IDLE_HZ
 448         bool "Dynamic tick timer"
 449         help
 450           Select this option if you want to disable continuous timer ticks
 451           and have them programmed to occur as required. This option saves
 452           power as the system can remain in idle state for longer.
 453
 454           By default dynamic tick is disabled during the boot, and can be
 455           manually enabled with:
 456
 457             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 458
 459           Alternatively, if you want dynamic tick automatically enabled
 460           during boot, pass "dyntick=enable" via the kernel command string.
 461
 462           Please note that dynamic tick may affect the accuracy of
 463           timekeeping on some platforms depending on the implementation.
 464           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 465           to have accurate timekeeping with dynamic tick.
 466
 467 config HZ
 468         int
 469         default 128 if ARCH_L7200
 470         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 471         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 472         default 100
 473
 474 config AEABI
 475         bool "Use the ARM EABI to compile the kernel"
 476         help
 477           This option allows for the kernel to be compiled using the latest
 478           ARM ABI (aka EABI).  This is only useful if you are using a user
 479           space environment that is also compiled with EABI.
 480
 481           Since there are major incompatibilities between the legacy ABI and
 482           EABI, especially with regard to structure member alignment, this
 483           option also changes the kernel syscall calling convention to
 484           disambiguate both ABIs and allow for backward compatibility support
 485           (selected with CONFIG_OABI_COMPAT).
 486
 487           To use this you need GCC version 4.0.0 or later.
 488
 489 config OABI_COMPAT
 490         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 491         depends on AEABI && EXPERIMENTAL
 492         default y
 493         help
 494           This option preserves the old syscall interface along with the
 495           new (ARM EABI) one. It also provides a compatibility layer to
 496           intercept syscalls that have structure arguments which layout
 497           in memory differs between the legacy ABI and the new ARM EABI
 498           (only for non "thumb" binaries). This option adds a tiny
 499           overhead to all syscalls and produces a slightly larger kernel.
 500           If you know you'll be using only pure EABI user space then you
 501           can say N here. If this option is not selected and you attempt
 502           to execute a legacy ABI binary then the result will be
 503           UNPREDICTABLE (in fact it can be predicted that it won't work
 504           at all). If in doubt say Y.
 505
 506 config ARCH_DISCONTIGMEM_ENABLE
 507         bool
 508         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 509         help
 510           Say Y to support efficient handling of discontiguous physical memory,
 511           for architectures which are either NUMA (Non-Uniform Memory Access)
 512           or have huge holes in the physical address space for other reasons.
 513           See <file:Documentation/vm/numa> for more.
 514
 515 config NODES_SHIFT
 516         int
 517         default "4" if ARCH_LH7A40X
 518         default "2"
 519         depends on NEED_MULTIPLE_NODES
 520
 521 source "mm/Kconfig"
 522
 523 config LEDS
 524         bool "Timer and CPU usage LEDs"
 525         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 526                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 527                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 528                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 529                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 530                    ARCH_AT91RM9200
 531         help
 532           If you say Y here, the LEDs on your machine will be used
 533           to provide useful information about your current system status.
 534
 535           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 536           be able to select which LEDs are active using the options below. If
 537           you are compiling a kernel for the EBSA-110 or the LART however, the
 538           red LED will simply flash regularly to indicate that the system is
 539           still functional. It is safe to say Y here if you have a CATS
 540           system, but the driver will do nothing.
 541
 542 config LEDS_TIMER
 543         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 544                             MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 545         depends on LEDS
 546         default y if ARCH_EBSA110
 547         help
 548           If you say Y here, one of the system LEDs (the green one on the
 549           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 550           will flash regularly to indicate that the system is still
 551           operational. This is mainly useful to kernel hackers who are
 552           debugging unstable kernels.
 553
 554           The LART uses the same LED for both Timer LED and CPU usage LED
 555           functions. You may choose to use both, but the Timer LED function
 556           will overrule the CPU usage LED.
 557
 558 config LEDS_CPU
 559         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 560                         !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 561         depends on LEDS
 562         help
 563           If you say Y here, the red LED will be used to give a good real
 564           time indication of CPU usage, by lighting whenever the idle task
 565           is not currently executing.
 566
 567           The LART uses the same LED for both Timer LED and CPU usage LED
 568           functions. You may choose to use both, but the Timer LED function
 569           will overrule the CPU usage LED.
 570
 571 config ALIGNMENT_TRAP
 572         bool
 573         default y if !ARCH_EBSA110
 574         help
 575           ARM processors can not fetch/store information which is not
 576           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 577           address divisible by 4. On 32-bit ARM processors, these non-aligned
 578           fetch/store instructions will be emulated in software if you say
 579           here, which has a severe performance impact. This is necessary for
 580           correct operation of some network protocols. With an IP-only
 581           configuration it is safe to say N, otherwise say Y.
 582
 583 endmenu
 584
 585 menu "Boot options"
 586
 587 # Compressed boot loader in ROM.  Yes, we really want to ask about
 588 # TEXT and BSS so we preserve their values in the config files.
 589 config ZBOOT_ROM_TEXT
 590         hex "Compressed ROM boot loader base address"
 591         default "0"
 592         help
 593           The physical address at which the ROM-able zImage is to be
 594           placed in the target.  Platforms which normally make use of
 595           ROM-able zImage formats normally set this to a suitable
 596           value in their defconfig file.
 597
 598           If ZBOOT_ROM is not enabled, this has no effect.
 599
 600 config ZBOOT_ROM_BSS
 601         hex "Compressed ROM boot loader BSS address"
 602         default "0"
 603         help
 604           The base address of 64KiB of read/write memory in the target
 605           for the ROM-able zImage, which must be available while the
 606           decompressor is running.  Platforms which normally make use of
 607           ROM-able zImage formats normally set this to a suitable
 608           value in their defconfig file.
 609
 610           If ZBOOT_ROM is not enabled, this has no effect.
 611
 612 config ZBOOT_ROM
 613         bool "Compressed boot loader in ROM/flash"
 614         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 615         help
 616           Say Y here if you intend to execute your compressed kernel image
 617           (zImage) directly from ROM or flash.  If unsure, say N.
 618
 619 config CMDLINE
 620         string "Default kernel command string"
 621         default ""
 622         help
 623           On some architectures (EBSA110 and CATS), there is currently no way
 624           for the boot loader to pass arguments to the kernel. For these
 625           architectures, you should supply some command-line options at build
 626           time by entering them here. As a minimum, you should specify the
 627           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 628
 629 config XIP_KERNEL
 630         bool "Kernel Execute-In-Place from ROM"
 631         depends on !ZBOOT_ROM
 632         help
 633           Execute-In-Place allows the kernel to run from non-volatile storage
 634           directly addressable by the CPU, such as NOR flash. This saves RAM
 635           space since the text section of the kernel is not loaded from flash
 636           to RAM.  Read-write sections, such as the data section and stack,
 637           are still copied to RAM.  The XIP kernel is not compressed since
 638           it has to run directly from flash, so it will take more space to
 639           store it.  The flash address used to link the kernel object files,
 640           and for storing it, is configuration dependent. Therefore, if you
 641           say Y here, you must know the proper physical address where to
 642           store the kernel image depending on your own flash memory usage.
 643
 644           Also note that the make target becomes "make xipImage" rather than
 645           "make zImage" or "make Image".  The final kernel binary to put in
 646           ROM memory will be arch/arm/boot/xipImage.
 647
 648           If unsure, say N.
 649
 650 config XIP_PHYS_ADDR
 651         hex "XIP Kernel Physical Location"
 652         depends on XIP_KERNEL
 653         default "0x00080000"
 654         help
 655           This is the physical address in your flash memory the kernel will
 656           be linked for and stored to.  This address is dependent on your
 657           own flash usage.
 658
 659 endmenu
 660
 661 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1)
 662
 663 menu "CPU Frequency scaling"
 664
 665 source "drivers/cpufreq/Kconfig"
 666
 667 config CPU_FREQ_SA1100
 668         bool
 669         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 670         default y
 671
 672 config CPU_FREQ_SA1110
 673         bool
 674         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 675         default y
 676
 677 config CPU_FREQ_INTEGRATOR
 678         tristate "CPUfreq driver for ARM Integrator CPUs"
 679         depends on ARCH_INTEGRATOR && CPU_FREQ
 680         default y
 681         help
 682           This enables the CPUfreq driver for ARM Integrator CPUs.
 683
 684           For details, take a look at <file:Documentation/cpu-freq>.
 685
 686           If in doubt, say Y.
 687
 688 endmenu
 689
 690 endif
 691
 692 menu "Floating point emulation"
 693
 694 comment "At least one emulation must be selected"
 695
 696 config FPE_NWFPE
 697         bool "NWFPE math emulation"
 698         depends on !AEABI || OABI_COMPAT
 699         ---help---
 700           Say Y to include the NWFPE floating point emulator in the kernel.
 701           This is necessary to run most binaries. Linux does not currently
 702           support floating point hardware so you need to say Y here even if
 703           your machine has an FPA or floating point co-processor podule.
 704
 705           You may say N here if you are going to load the Acorn FPEmulator
 706           early in the bootup.
 707
 708 config FPE_NWFPE_XP
 709         bool "Support extended precision"
 710         depends on FPE_NWFPE
 711         help
 712           Say Y to include 80-bit support in the kernel floating-point
 713           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 714           Note that gcc does not generate 80-bit operations by default,
 715           so in most cases this option only enlarges the size of the
 716           floating point emulator without any good reason.
 717
 718           You almost surely want to say N here.
 719
 720 config FPE_FASTFPE
 721         bool "FastFPE math emulation (EXPERIMENTAL)"
 722         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 723         ---help---
 724           Say Y here to include the FAST floating point emulator in the kernel.
 725           This is an experimental much faster emulator which now also has full
 726           precision for the mantissa.  It does not support any exceptions.
 727           It is very simple, and approximately 3-6 times faster than NWFPE.
 728
 729           It should be sufficient for most programs.  It may be not suitable
 730           for scientific calculations, but you have to check this for yourself.
 731           If you do not feel you need a faster FP emulation you should better
 732           choose NWFPE.
 733
 734 config VFP
 735         bool "VFP-format floating point maths"
 736         depends on CPU_V6 || CPU_ARM926T
 737         help
 738           Say Y to include VFP support code in the kernel. This is needed
 739           if your hardware includes a VFP unit.
 740
 741           Please see <file:Documentation/arm/VFP/release-notes.txt> for
 742           release notes and additional status information.
 743
 744           Say N if your target does not have VFP hardware.
 745
 746 endmenu
 747
 748 menu "Userspace binary formats"
 749
 750 source "fs/Kconfig.binfmt"
 751
 752 config ARTHUR
 753         tristate "RISC OS personality"
 754         depends on !AEABI
 755         help
 756           Say Y here to include the kernel code necessary if you want to run
 757           Acorn RISC OS/Arthur binaries under Linux. This code is still very
 758           experimental; if this sounds frightening, say N and sleep in peace.
 759           You can also say M here to compile this support as a module (which
 760           will be called arthur).
 761
 762 endmenu
 763
 764 menu "Power management options"
 765
 766 source "kernel/power/Kconfig"
 767
 768 config APM
 769         tristate "Advanced Power Management Emulation"
 770         ---help---
 771           APM is a BIOS specification for saving power using several different
 772           techniques. This is mostly useful for battery powered laptops with
 773           APM compliant BIOSes. If you say Y here, the system time will be
 774           reset after a RESUME operation, the /proc/apm device will provide
 775           battery status information, and user-space programs will receive
 776           notification of APM "events" (e.g. battery status change).
 777
 778           In order to use APM, you will need supporting software. For location
 779           and more information, read <file:Documentation/pm.txt> and the
 780           Battery Powered Linux mini-HOWTO, available from
 781           <http://www.tldp.org/docs.html#howto>.
 782
 783           This driver does not spin down disk drives (see the hdparm(8)
 784           manpage ("man 8 hdparm") for that), and it doesn't turn off
 785           VESA-compliant "green" monitors.
 786
 787           Generally, if you don't have a battery in your machine, there isn't
 788           much point in using this driver and you should say N. If you get
 789           random kernel OOPSes or reboots that don't seem to be related to
 790           anything, try disabling/enabling this option (or disabling/enabling
 791           APM in your BIOS).
 792
 793 endmenu
 794
 795 source "net/Kconfig"
 796
 797 menu "Device Drivers"
 798
 799 source "drivers/base/Kconfig"
 800
 801 source "drivers/connector/Kconfig"
 802
 803 if ALIGNMENT_TRAP
 804 source "drivers/mtd/Kconfig"
 805 endif
 806
 807 source "drivers/parport/Kconfig"
 808
 809 source "drivers/pnp/Kconfig"
 810
 811 source "drivers/block/Kconfig"
 812
 813 source "drivers/acorn/block/Kconfig"
 814
 815 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
 816         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
 817         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
 818         || ARCH_IXP23XX
 819 source "drivers/ide/Kconfig"
 820 endif
 821
 822 source "drivers/scsi/Kconfig"
 823
 824 source "drivers/md/Kconfig"
 825
 826 source "drivers/message/fusion/Kconfig"
 827
 828 source "drivers/ieee1394/Kconfig"
 829
 830 source "drivers/message/i2o/Kconfig"
 831
 832 source "drivers/net/Kconfig"
 833
 834 source "drivers/isdn/Kconfig"
 835
 836 # input before char - char/joystick depends on it. As does USB.
 837
 838 source "drivers/input/Kconfig"
 839
 840 source "drivers/char/Kconfig"
 841
 842 source "drivers/i2c/Kconfig"
 843
 844 source "drivers/spi/Kconfig"
 845
 846 source "drivers/w1/Kconfig"
 847
 848 source "drivers/hwmon/Kconfig"
 849
 850 #source "drivers/l3/Kconfig"
 851
 852 source "drivers/misc/Kconfig"
 853
 854 source "drivers/mfd/Kconfig"
 855
 856 source "drivers/leds/Kconfig"
 857
 858 source "drivers/media/Kconfig"
 859
 860 source "drivers/video/Kconfig"
 861
 862 source "sound/Kconfig"
 863
 864 source "drivers/usb/Kconfig"
 865
 866 source "drivers/mmc/Kconfig"
 867
 868 source "drivers/rtc/Kconfig"
 869
 870 endmenu
 871
 872 source "fs/Kconfig"
 873
 874 source "arch/arm/oprofile/Kconfig"
 875
 876 source "arch/arm/Kconfig.debug"
 877
 878 source "security/Kconfig"
 879
 880 source "crypto/Kconfig"
 881
 882 source "lib/Kconfig"