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