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_AAEC2000
  97         bool "Agilent AAEC-2000 based"
  98         select ARM_AMBA
  99         help
 100           This enables support for systems based on the Agilent AAEC-2000
 101
 102 config ARCH_INTEGRATOR
 103         bool "ARM Ltd. Integrator family"
 104         select ARM_AMBA
 105         select ICST525
 106         help
 107           Support for ARM's Integrator platform.
 108
 109 config ARCH_REALVIEW
 110         bool "ARM Ltd. RealView family"
 111         select ARM_AMBA
 112         select ICST307
 113         help
 114           This enables support for ARM Ltd RealView boards.
 115
 116 config ARCH_VERSATILE
 117         bool "ARM Ltd. Versatile family"
 118         select ARM_AMBA
 119         select ARM_VIC
 120         select ICST307
 121         help
 122           This enables support for ARM Ltd Versatile board.
 123
 124 config ARCH_AT91RM9200
 125         bool "Atmel AT91RM9200"
 126         help
 127           Say Y here if you intend to run this kernel on an Atmel
 128           AT91RM9200-based board.
 129
 130 config ARCH_CLPS7500
 131         bool "Cirrus CL-PS7500FE"
 132         select TIMER_ACORN
 133         select ISA
 134         help
 135           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 136
 137 config ARCH_CLPS711X
 138         bool "Cirrus Logic CLPS711x/EP721x-based"
 139         help
 140           Support for Cirrus Logic 711x/721x based boards.
 141
 142 config ARCH_CO285
 143         bool "Co-EBSA285"
 144         select FOOTBRIDGE
 145         select FOOTBRIDGE_ADDIN
 146         help
 147           Support for Intel's EBSA285 companion chip.
 148
 149 config ARCH_EBSA110
 150         bool "EBSA-110"
 151         select ISA
 152         help
 153           This is an evaluation board for the StrongARM processor available
 154           from Digital. It has limited hardware on-board, including an
 155           Ethernet interface, two PCMCIA sockets, two serial ports and a
 156           parallel port.
 157
 158 config ARCH_EP93XX
 159         bool "EP93xx-based"
 160         select ARM_AMBA
 161         select ARM_VIC
 162         help
 163           This enables support for the Cirrus EP93xx series of CPUs.
 164
 165 config ARCH_FOOTBRIDGE
 166         bool "FootBridge"
 167         select FOOTBRIDGE
 168         help
 169           Support for systems based on the DC21285 companion chip
 170           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 171
 172 config ARCH_NETX
 173         bool "Hilscher NetX based"
 174         select ARM_VIC
 175         help
 176           This enables support for systems based on the Hilscher NetX Soc
 177
 178 config ARCH_H720X
 179         bool "Hynix HMS720x-based"
 180         select ISA_DMA_API
 181         help
 182           This enables support for systems based on the Hynix HMS720x
 183
 184 config ARCH_IMX
 185         bool "IMX"
 186         help
 187           Support for Motorola's i.MX family of processors (MX1, MXL).
 188
 189 config ARCH_IOP3XX
 190         bool "IOP3xx-based"
 191         depends on MMU
 192         select PCI
 193         help
 194           Support for Intel's IOP3XX (XScale) family of processors.
 195
 196 config ARCH_IXP4XX
 197         bool "IXP4xx-based"
 198         depends on MMU
 199         help
 200           Support for Intel's IXP4XX (XScale) family of processors.
 201
 202 config ARCH_IXP2000
 203         bool "IXP2400/2800-based"
 204         depends on MMU
 205         select PCI
 206         help
 207           Support for Intel's IXP2400/2800 (XScale) family of processors.
 208
 209 config ARCH_IXP23XX
 210         bool "IXP23XX-based"
 211         depends on MMU
 212         select PCI
 213         help
 214           Support for Intel's IXP23xx (XScale) family of processors.
 215
 216 config ARCH_L7200
 217         bool "LinkUp-L7200"
 218         select FIQ
 219         help
 220           Say Y here if you intend to run this kernel on a LinkUp Systems
 221           L7200 Software Development Board which uses an ARM720T processor.
 222           Information on this board can be obtained at:
 223
 224           <http://www.linkupsys.com/>
 225
 226           If you have any questions or comments about the Linux kernel port
 227           to this board, send e-mail to <sjhill@cotw.com>.
 228
 229 config ARCH_PNX4008
 230         bool "Philips Nexperia PNX4008 Mobile"
 231         help
 232           This enables support for Philips PNX4008 mobile platform.
 233
 234 config ARCH_PXA
 235         bool "PXA2xx-based"
 236         depends on MMU
 237         select ARCH_MTD_XIP
 238         help
 239           Support for Intel's PXA2XX processor line.
 240
 241 config ARCH_RPC
 242         bool "RiscPC"
 243         select ARCH_ACORN
 244         select FIQ
 245         select TIMER_ACORN
 246         select ARCH_MAY_HAVE_PC_FDC
 247         select ISA_DMA_API
 248         help
 249           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 250           CD-ROM interface, serial and parallel port, and the floppy drive.
 251
 252 config ARCH_SA1100
 253         bool "SA1100-based"
 254         select ISA
 255         select ARCH_DISCONTIGMEM_ENABLE
 256         select ARCH_MTD_XIP
 257         help
 258           Support for StrongARM 11x0 based boards.
 259
 260 config ARCH_S3C2410
 261         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
 262         help
 263           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 264           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 265           the Samsung SMDK2410 development board (and derivatives).
 266
 267 config ARCH_SHARK
 268         bool "Shark"
 269         select ISA
 270         select ISA_DMA
 271         select PCI
 272         help
 273           Support for the StrongARM based Digital DNARD machine, also known
 274           as "Shark" (<http://www.shark-linux.de/shark.html>).
 275
 276 config ARCH_LH7A40X
 277         bool "Sharp LH7A40X"
 278         help
 279           Say Y here for systems based on one of the Sharp LH7A40X
 280           System on a Chip processors.  These CPUs include an ARM922T
 281           core with a wide array of integrated devices for
 282           hand-held and low-power applications.
 283
 284 config ARCH_OMAP
 285         bool "TI OMAP"
 286         help
 287           Support for TI's OMAP platform (OMAP1 and OMAP2).
 288
 289 endchoice
 290
 291 source "arch/arm/mach-clps711x/Kconfig"
 292
 293 source "arch/arm/mach-ep93xx/Kconfig"
 294
 295 source "arch/arm/mach-footbridge/Kconfig"
 296
 297 source "arch/arm/mach-integrator/Kconfig"
 298
 299 source "arch/arm/mach-iop3xx/Kconfig"
 300
 301 source "arch/arm/mach-ixp4xx/Kconfig"
 302
 303 source "arch/arm/mach-ixp2000/Kconfig"
 304
 305 source "arch/arm/mach-ixp23xx/Kconfig"
 306
 307 source "arch/arm/mach-pxa/Kconfig"
 308
 309 source "arch/arm/mach-sa1100/Kconfig"
 310
 311 source "arch/arm/plat-omap/Kconfig"
 312
 313 source "arch/arm/mach-omap1/Kconfig"
 314
 315 source "arch/arm/mach-omap2/Kconfig"
 316
 317 source "arch/arm/mach-s3c2410/Kconfig"
 318
 319 source "arch/arm/mach-lh7a40x/Kconfig"
 320
 321 source "arch/arm/mach-imx/Kconfig"
 322
 323 source "arch/arm/mach-h720x/Kconfig"
 324
 325 source "arch/arm/mach-versatile/Kconfig"
 326
 327 source "arch/arm/mach-aaec2000/Kconfig"
 328
 329 source "arch/arm/mach-realview/Kconfig"
 330
 331 source "arch/arm/mach-at91rm9200/Kconfig"
 332
 333 source "arch/arm/mach-netx/Kconfig"
 334
 335 # Definitions to make life easier
 336 config ARCH_ACORN
 337         bool
 338
 339 source arch/arm/mm/Kconfig
 340
 341 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 342 config XSCALE_PMU
 343         bool
 344         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 345         default y
 346
 347 if !MMU
 348 source "arch/arm/Kconfig-nommu"
 349 endif
 350
 351 endmenu
 352
 353 source "arch/arm/common/Kconfig"
 354
 355 config FORCE_MAX_ZONEORDER
 356         int
 357         depends on SA1111
 358         default "9"
 359
 360 menu "Bus support"
 361
 362 config ARM_AMBA
 363         bool
 364
 365 config ISA
 366         bool
 367         help
 368           Find out whether you have ISA slots on your motherboard.  ISA is the
 369           name of a bus system, i.e. the way the CPU talks to the other stuff
 370           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 371           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 372           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 373
 374 # Select ISA DMA controller support
 375 config ISA_DMA
 376         bool
 377         select ISA_DMA_API
 378
 379 # Select ISA DMA interface
 380 config ISA_DMA_API
 381         bool
 382
 383 config PCI
 384         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
 385         help
 386           Find out whether you have a PCI motherboard. PCI is the name of a
 387           bus system, i.e. the way the CPU talks to the other stuff inside
 388           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 389           VESA. If you have PCI, say Y, otherwise N.
 390
 391           The PCI-HOWTO, available from
 392           <http://www.tldp.org/docs.html#howto>, contains valuable
 393           information about which PCI hardware does work under Linux and which
 394           doesn't.
 395
 396 # Select the host bridge type
 397 config PCI_HOST_VIA82C505
 398         bool
 399         depends on PCI && ARCH_SHARK
 400         default y
 401
 402 source "drivers/pci/Kconfig"
 403
 404 source "drivers/pcmcia/Kconfig"
 405
 406 endmenu
 407
 408 menu "Kernel Features"
 409
 410 config SMP
 411         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 412         depends on EXPERIMENTAL && REALVIEW_MPCORE
 413         help
 414           This enables support for systems with more than one CPU. If you have
 415           a system with only one CPU, like most personal computers, say N. If
 416           you have a system with more than one CPU, say Y.
 417
 418           If you say N here, the kernel will run on single and multiprocessor
 419           machines, but will use only one CPU of a multiprocessor machine. If
 420           you say Y here, the kernel will run on many, but not all, single
 421           processor machines. On a single processor machine, the kernel will
 422           run faster if you say N here.
 423
 424           See also the <file:Documentation/smp.txt>,
 425           <file:Documentation/i386/IO-APIC.txt>,
 426           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 427           <http://www.linuxdoc.org/docs.html#howto>.
 428
 429           If you don't know what to do here, say N.
 430
 431 config NR_CPUS
 432         int "Maximum number of CPUs (2-32)"
 433         range 2 32
 434         depends on SMP
 435         default "4"
 436
 437 config HOTPLUG_CPU
 438         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 439         depends on SMP && HOTPLUG && EXPERIMENTAL
 440         help
 441           Say Y here to experiment with turning CPUs off and on.  CPUs
 442           can be controlled through /sys/devices/system/cpu.
 443
 444 config LOCAL_TIMERS
 445         bool "Use local timer interrupts"
 446         depends on SMP && REALVIEW_MPCORE
 447         default y
 448         help
 449           Enable support for local timers on SMP platforms, rather then the
 450           legacy IPI broadcast method.  Local timers allows the system
 451           accounting to be spread across the timer interval, preventing a
 452           "thundering herd" at every timer tick.
 453
 454 config PREEMPT
 455         bool "Preemptible Kernel (EXPERIMENTAL)"
 456         depends on EXPERIMENTAL
 457         help
 458           This option reduces the latency of the kernel when reacting to
 459           real-time or interactive events by allowing a low priority process to
 460           be preempted even if it is in kernel mode executing a system call.
 461           This allows applications to run more reliably even when the system is
 462           under load.
 463
 464           Say Y here if you are building a kernel for a desktop, embedded
 465           or real-time system.  Say N if you are unsure.
 466
 467 config NO_IDLE_HZ
 468         bool "Dynamic tick timer"
 469         help
 470           Select this option if you want to disable continuous timer ticks
 471           and have them programmed to occur as required. This option saves
 472           power as the system can remain in idle state for longer.
 473
 474           By default dynamic tick is disabled during the boot, and can be
 475           manually enabled with:
 476
 477             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 478
 479           Alternatively, if you want dynamic tick automatically enabled
 480           during boot, pass "dyntick=enable" via the kernel command string.
 481
 482           Please note that dynamic tick may affect the accuracy of
 483           timekeeping on some platforms depending on the implementation.
 484           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 485           to have accurate timekeeping with dynamic tick.
 486
 487 config HZ
 488         int
 489         default 128 if ARCH_L7200
 490         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 491         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 492         default 100
 493
 494 config AEABI
 495         bool "Use the ARM EABI to compile the kernel"
 496         help
 497           This option allows for the kernel to be compiled using the latest
 498           ARM ABI (aka EABI).  This is only useful if you are using a user
 499           space environment that is also compiled with EABI.
 500
 501           Since there are major incompatibilities between the legacy ABI and
 502           EABI, especially with regard to structure member alignment, this
 503           option also changes the kernel syscall calling convention to
 504           disambiguate both ABIs and allow for backward compatibility support
 505           (selected with CONFIG_OABI_COMPAT).
 506
 507           To use this you need GCC version 4.0.0 or later.
 508
 509 config OABI_COMPAT
 510         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 511         depends on AEABI && EXPERIMENTAL
 512         default y
 513         help
 514           This option preserves the old syscall interface along with the
 515           new (ARM EABI) one. It also provides a compatibility layer to
 516           intercept syscalls that have structure arguments which layout
 517           in memory differs between the legacy ABI and the new ARM EABI
 518           (only for non "thumb" binaries). This option adds a tiny
 519           overhead to all syscalls and produces a slightly larger kernel.
 520           If you know you'll be using only pure EABI user space then you
 521           can say N here. If this option is not selected and you attempt
 522           to execute a legacy ABI binary then the result will be
 523           UNPREDICTABLE (in fact it can be predicted that it won't work
 524           at all). If in doubt say Y.
 525
 526 config ARCH_DISCONTIGMEM_ENABLE
 527         bool
 528         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 529         help
 530           Say Y to support efficient handling of discontiguous physical memory,
 531           for architectures which are either NUMA (Non-Uniform Memory Access)
 532           or have huge holes in the physical address space for other reasons.
 533           See <file:Documentation/vm/numa> for more.
 534
 535 config NODES_SHIFT
 536         int
 537         default "4" if ARCH_LH7A40X
 538         default "2"
 539         depends on NEED_MULTIPLE_NODES
 540
 541 source "mm/Kconfig"
 542
 543 config LEDS
 544         bool "Timer and CPU usage LEDs"
 545         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 546                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 547                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 548                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 549                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 550                    ARCH_AT91RM9200
 551         help
 552           If you say Y here, the LEDs on your machine will be used
 553           to provide useful information about your current system status.
 554
 555           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 556           be able to select which LEDs are active using the options below. If
 557           you are compiling a kernel for the EBSA-110 or the LART however, the
 558           red LED will simply flash regularly to indicate that the system is
 559           still functional. It is safe to say Y here if you have a CATS
 560           system, but the driver will do nothing.
 561
 562 config LEDS_TIMER
 563         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 564                             MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 565         depends on LEDS
 566         default y if ARCH_EBSA110
 567         help
 568           If you say Y here, one of the system LEDs (the green one on the
 569           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 570           will flash regularly to indicate that the system is still
 571           operational. This is mainly useful to kernel hackers who are
 572           debugging unstable kernels.
 573
 574           The LART uses the same LED for both Timer LED and CPU usage LED
 575           functions. You may choose to use both, but the Timer LED function
 576           will overrule the CPU usage LED.
 577
 578 config LEDS_CPU
 579         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 580                         !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 581         depends on LEDS
 582         help
 583           If you say Y here, the red LED will be used to give a good real
 584           time indication of CPU usage, by lighting whenever the idle task
 585           is not currently executing.
 586
 587           The LART uses the same LED for both Timer LED and CPU usage LED
 588           functions. You may choose to use both, but the Timer LED function
 589           will overrule the CPU usage LED.
 590
 591 config ALIGNMENT_TRAP
 592         bool
 593         default y if !ARCH_EBSA110
 594         help
 595           ARM processors can not fetch/store information which is not
 596           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 597           address divisible by 4. On 32-bit ARM processors, these non-aligned
 598           fetch/store instructions will be emulated in software if you say
 599           here, which has a severe performance impact. This is necessary for
 600           correct operation of some network protocols. With an IP-only
 601           configuration it is safe to say N, otherwise say Y.
 602
 603 endmenu
 604
 605 menu "Boot options"
 606
 607 # Compressed boot loader in ROM.  Yes, we really want to ask about
 608 # TEXT and BSS so we preserve their values in the config files.
 609 config ZBOOT_ROM_TEXT
 610         hex "Compressed ROM boot loader base address"
 611         default "0"
 612         help
 613           The physical address at which the ROM-able zImage is to be
 614           placed in the target.  Platforms which normally make use of
 615           ROM-able zImage formats normally set this to a suitable
 616           value in their defconfig file.
 617
 618           If ZBOOT_ROM is not enabled, this has no effect.
 619
 620 config ZBOOT_ROM_BSS
 621         hex "Compressed ROM boot loader BSS address"
 622         default "0"
 623         help
 624           The base address of 64KiB of read/write memory in the target
 625           for the ROM-able zImage, which must be available while the
 626           decompressor is running.  Platforms which normally make use of
 627           ROM-able zImage formats normally set this to a suitable
 628           value in their defconfig file.
 629
 630           If ZBOOT_ROM is not enabled, this has no effect.
 631
 632 config ZBOOT_ROM
 633         bool "Compressed boot loader in ROM/flash"
 634         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 635         help
 636           Say Y here if you intend to execute your compressed kernel image
 637           (zImage) directly from ROM or flash.  If unsure, say N.
 638
 639 config CMDLINE
 640         string "Default kernel command string"
 641         default ""
 642         help
 643           On some architectures (EBSA110 and CATS), there is currently no way
 644           for the boot loader to pass arguments to the kernel. For these
 645           architectures, you should supply some command-line options at build
 646           time by entering them here. As a minimum, you should specify the
 647           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 648
 649 config XIP_KERNEL
 650         bool "Kernel Execute-In-Place from ROM"
 651         depends on !ZBOOT_ROM
 652         help
 653           Execute-In-Place allows the kernel to run from non-volatile storage
 654           directly addressable by the CPU, such as NOR flash. This saves RAM
 655           space since the text section of the kernel is not loaded from flash
 656           to RAM.  Read-write sections, such as the data section and stack,
 657           are still copied to RAM.  The XIP kernel is not compressed since
 658           it has to run directly from flash, so it will take more space to
 659           store it.  The flash address used to link the kernel object files,
 660           and for storing it, is configuration dependent. Therefore, if you
 661           say Y here, you must know the proper physical address where to
 662           store the kernel image depending on your own flash memory usage.
 663
 664           Also note that the make target becomes "make xipImage" rather than
 665           "make zImage" or "make Image".  The final kernel binary to put in
 666           ROM memory will be arch/arm/boot/xipImage.
 667
 668           If unsure, say N.
 669
 670 config XIP_PHYS_ADDR
 671         hex "XIP Kernel Physical Location"
 672         depends on XIP_KERNEL
 673         default "0x00080000"
 674         help
 675           This is the physical address in your flash memory the kernel will
 676           be linked for and stored to.  This address is dependent on your
 677           own flash usage.
 678
 679 endmenu
 680
 681 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1)
 682
 683 menu "CPU Frequency scaling"
 684
 685 source "drivers/cpufreq/Kconfig"
 686
 687 config CPU_FREQ_SA1100
 688         bool
 689         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 690         default y
 691
 692 config CPU_FREQ_SA1110
 693         bool
 694         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 695         default y
 696
 697 config CPU_FREQ_INTEGRATOR
 698         tristate "CPUfreq driver for ARM Integrator CPUs"
 699         depends on ARCH_INTEGRATOR && CPU_FREQ
 700         default y
 701         help
 702           This enables the CPUfreq driver for ARM Integrator CPUs.
 703
 704           For details, take a look at <file:Documentation/cpu-freq>.
 705
 706           If in doubt, say Y.
 707
 708 endmenu
 709
 710 endif
 711
 712 menu "Floating point emulation"
 713
 714 comment "At least one emulation must be selected"
 715
 716 config FPE_NWFPE
 717         bool "NWFPE math emulation"
 718         depends on !AEABI || OABI_COMPAT
 719         ---help---
 720           Say Y to include the NWFPE floating point emulator in the kernel.
 721           This is necessary to run most binaries. Linux does not currently
 722           support floating point hardware so you need to say Y here even if
 723           your machine has an FPA or floating point co-processor podule.
 724
 725           You may say N here if you are going to load the Acorn FPEmulator
 726           early in the bootup.
 727
 728 config FPE_NWFPE_XP
 729         bool "Support extended precision"
 730         depends on FPE_NWFPE
 731         help
 732           Say Y to include 80-bit support in the kernel floating-point
 733           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 734           Note that gcc does not generate 80-bit operations by default,
 735           so in most cases this option only enlarges the size of the
 736           floating point emulator without any good reason.
 737
 738           You almost surely want to say N here.
 739
 740 config FPE_FASTFPE
 741         bool "FastFPE math emulation (EXPERIMENTAL)"
 742         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 743         ---help---
 744           Say Y here to include the FAST floating point emulator in the kernel.
 745           This is an experimental much faster emulator which now also has full
 746           precision for the mantissa.  It does not support any exceptions.
 747           It is very simple, and approximately 3-6 times faster than NWFPE.
 748
 749           It should be sufficient for most programs.  It may be not suitable
 750           for scientific calculations, but you have to check this for yourself.
 751           If you do not feel you need a faster FP emulation you should better
 752           choose NWFPE.
 753
 754 config VFP
 755         bool "VFP-format floating point maths"
 756         depends on CPU_V6 || CPU_ARM926T
 757         help
 758           Say Y to include VFP support code in the kernel. This is needed
 759           if your hardware includes a VFP unit.
 760
 761           Please see <file:Documentation/arm/VFP/release-notes.txt> for
 762           release notes and additional status information.
 763
 764           Say N if your target does not have VFP hardware.
 765
 766 endmenu
 767
 768 menu "Userspace binary formats"
 769
 770 source "fs/Kconfig.binfmt"
 771
 772 config ARTHUR
 773         tristate "RISC OS personality"
 774         depends on !AEABI
 775         help
 776           Say Y here to include the kernel code necessary if you want to run
 777           Acorn RISC OS/Arthur binaries under Linux. This code is still very
 778           experimental; if this sounds frightening, say N and sleep in peace.
 779           You can also say M here to compile this support as a module (which
 780           will be called arthur).
 781
 782 endmenu
 783
 784 menu "Power management options"
 785
 786 source "kernel/power/Kconfig"
 787
 788 config APM
 789         tristate "Advanced Power Management Emulation"
 790         ---help---
 791           APM is a BIOS specification for saving power using several different
 792           techniques. This is mostly useful for battery powered laptops with
 793           APM compliant BIOSes. If you say Y here, the system time will be
 794           reset after a RESUME operation, the /proc/apm device will provide
 795           battery status information, and user-space programs will receive
 796           notification of APM "events" (e.g. battery status change).
 797
 798           In order to use APM, you will need supporting software. For location
 799           and more information, read <file:Documentation/pm.txt> and the
 800           Battery Powered Linux mini-HOWTO, available from
 801           <http://www.tldp.org/docs.html#howto>.
 802
 803           This driver does not spin down disk drives (see the hdparm(8)
 804           manpage ("man 8 hdparm") for that), and it doesn't turn off
 805           VESA-compliant "green" monitors.
 806
 807           Generally, if you don't have a battery in your machine, there isn't
 808           much point in using this driver and you should say N. If you get
 809           random kernel OOPSes or reboots that don't seem to be related to
 810           anything, try disabling/enabling this option (or disabling/enabling
 811           APM in your BIOS).
 812
 813 endmenu
 814
 815 source "net/Kconfig"
 816
 817 menu "Device Drivers"
 818
 819 source "drivers/base/Kconfig"
 820
 821 source "drivers/connector/Kconfig"
 822
 823 if ALIGNMENT_TRAP
 824 source "drivers/mtd/Kconfig"
 825 endif
 826
 827 source "drivers/parport/Kconfig"
 828
 829 source "drivers/pnp/Kconfig"
 830
 831 source "drivers/block/Kconfig"
 832
 833 source "drivers/acorn/block/Kconfig"
 834
 835 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
 836         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
 837         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
 838         || ARCH_IXP23XX
 839 source "drivers/ide/Kconfig"
 840 endif
 841
 842 source "drivers/scsi/Kconfig"
 843
 844 source "drivers/md/Kconfig"
 845
 846 source "drivers/message/fusion/Kconfig"
 847
 848 source "drivers/ieee1394/Kconfig"
 849
 850 source "drivers/message/i2o/Kconfig"
 851
 852 source "drivers/net/Kconfig"
 853
 854 source "drivers/isdn/Kconfig"
 855
 856 # input before char - char/joystick depends on it. As does USB.
 857
 858 source "drivers/input/Kconfig"
 859
 860 source "drivers/char/Kconfig"
 861
 862 source "drivers/i2c/Kconfig"
 863
 864 source "drivers/spi/Kconfig"
 865
 866 source "drivers/w1/Kconfig"
 867
 868 source "drivers/hwmon/Kconfig"
 869
 870 #source "drivers/l3/Kconfig"
 871
 872 source "drivers/misc/Kconfig"
 873
 874 source "drivers/mfd/Kconfig"
 875
 876 source "drivers/leds/Kconfig"
 877
 878 source "drivers/media/Kconfig"
 879
 880 source "drivers/video/Kconfig"
 881
 882 source "sound/Kconfig"
 883
 884 source "drivers/usb/Kconfig"
 885
 886 source "drivers/mmc/Kconfig"
 887
 888 source "drivers/rtc/Kconfig"
 889
 890 endmenu
 891
 892 source "fs/Kconfig"
 893
 894 source "arch/arm/oprofile/Kconfig"
 895
 896 source "arch/arm/Kconfig.debug"
 897
 898 source "security/Kconfig"
 899
 900 source "crypto/Kconfig"
 901
 902 source "lib/Kconfig"