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 GENERIC_HARDIRQS
  51         bool
  52         default y
  53
  54 config HARDIRQS_SW_RESEND
  55         bool
  56         default y
  57
  58 config GENERIC_IRQ_PROBE
  59         bool
  60         default y
  61
  62 config RWSEM_GENERIC_SPINLOCK
  63         bool
  64         default y
  65
  66 config RWSEM_XCHGADD_ALGORITHM
  67         bool
  68
  69 config GENERIC_HWEIGHT
  70         bool
  71         default y
  72
  73 config GENERIC_CALIBRATE_DELAY
  74         bool
  75         default y
  76
  77 config GENERIC_BUST_SPINLOCK
  78         bool
  79
  80 config ARCH_MAY_HAVE_PC_FDC
  81         bool
  82
  83 config GENERIC_ISA_DMA
  84         bool
  85
  86 config FIQ
  87         bool
  88
  89 config ARCH_MTD_XIP
  90         bool
  91
  92 config VECTORS_BASE
  93         hex
  94         default 0xffff0000 if MMU
  95         default DRAM_BASE if REMAP_VECTORS_TO_RAM
  96         default 0x00000000
  97         help
  98           The base address of exception vectors.
  99
 100 source "init/Kconfig"
 101
 102 menu "System Type"
 103
 104 choice
 105         prompt "ARM system type"
 106         default ARCH_VERSATILE
 107
 108 config ARCH_AAEC2000
 109         bool "Agilent AAEC-2000 based"
 110         select ARM_AMBA
 111         help
 112           This enables support for systems based on the Agilent AAEC-2000
 113
 114 config ARCH_INTEGRATOR
 115         bool "ARM Ltd. Integrator family"
 116         select ARM_AMBA
 117         select ICST525
 118         help
 119           Support for ARM's Integrator platform.
 120
 121 config ARCH_REALVIEW
 122         bool "ARM Ltd. RealView family"
 123         select ARM_AMBA
 124         select ICST307
 125         help
 126           This enables support for ARM Ltd RealView boards.
 127
 128 config ARCH_VERSATILE
 129         bool "ARM Ltd. Versatile family"
 130         select ARM_AMBA
 131         select ARM_VIC
 132         select ICST307
 133         help
 134           This enables support for ARM Ltd Versatile board.
 135
 136 config ARCH_AT91
 137         bool "Atmel AT91"
 138         help
 139           This enables support for systems based on the Atmel AT91RM9200
 140           and AT91SAM9xxx processors.
 141
 142 config ARCH_CLPS7500
 143         bool "Cirrus CL-PS7500FE"
 144         select TIMER_ACORN
 145         select ISA
 146         help
 147           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 148
 149 config ARCH_CLPS711X
 150         bool "Cirrus Logic CLPS711x/EP721x-based"
 151         help
 152           Support for Cirrus Logic 711x/721x based boards.
 153
 154 config ARCH_CO285
 155         bool "Co-EBSA285"
 156         select FOOTBRIDGE
 157         select FOOTBRIDGE_ADDIN
 158         help
 159           Support for Intel's EBSA285 companion chip.
 160
 161 config ARCH_EBSA110
 162         bool "EBSA-110"
 163         select ISA
 164         help
 165           This is an evaluation board for the StrongARM processor available
 166           from Digital. It has limited hardware on-board, including an
 167           Ethernet interface, two PCMCIA sockets, two serial ports and a
 168           parallel port.
 169
 170 config ARCH_EP93XX
 171         bool "EP93xx-based"
 172         select ARM_AMBA
 173         select ARM_VIC
 174         help
 175           This enables support for the Cirrus EP93xx series of CPUs.
 176
 177 config ARCH_FOOTBRIDGE
 178         bool "FootBridge"
 179         select FOOTBRIDGE
 180         help
 181           Support for systems based on the DC21285 companion chip
 182           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 183
 184 config ARCH_NETX
 185         bool "Hilscher NetX based"
 186         select ARM_VIC
 187         help
 188           This enables support for systems based on the Hilscher NetX Soc
 189
 190 config ARCH_H720X
 191         bool "Hynix HMS720x-based"
 192         select ISA_DMA_API
 193         help
 194           This enables support for systems based on the Hynix HMS720x
 195
 196 config ARCH_IMX
 197         bool "IMX"
 198         help
 199           Support for Motorola's i.MX family of processors (MX1, MXL).
 200
 201 config ARCH_IOP3XX
 202         bool "IOP3xx-based"
 203         depends on MMU
 204         select PCI
 205         help
 206           Support for Intel's IOP3XX (XScale) family of processors.
 207
 208 config ARCH_IXP4XX
 209         bool "IXP4xx-based"
 210         depends on MMU
 211         help
 212           Support for Intel's IXP4XX (XScale) family of processors.
 213
 214 config ARCH_IXP2000
 215         bool "IXP2400/2800-based"
 216         depends on MMU
 217         select PCI
 218         help
 219           Support for Intel's IXP2400/2800 (XScale) family of processors.
 220
 221 config ARCH_IXP23XX
 222         bool "IXP23XX-based"
 223         depends on MMU
 224         select PCI
 225         help
 226           Support for Intel's IXP23xx (XScale) family of processors.
 227
 228 config ARCH_L7200
 229         bool "LinkUp-L7200"
 230         select FIQ
 231         help
 232           Say Y here if you intend to run this kernel on a LinkUp Systems
 233           L7200 Software Development Board which uses an ARM720T processor.
 234           Information on this board can be obtained at:
 235
 236           <http://www.linkupsys.com/>
 237
 238           If you have any questions or comments about the Linux kernel port
 239           to this board, send e-mail to <sjhill@cotw.com>.
 240
 241 config ARCH_PNX4008
 242         bool "Philips Nexperia PNX4008 Mobile"
 243         help
 244           This enables support for Philips PNX4008 mobile platform.
 245
 246 config ARCH_PXA
 247         bool "PXA2xx-based"
 248         depends on MMU
 249         select ARCH_MTD_XIP
 250         help
 251           Support for Intel's PXA2XX processor line.
 252
 253 config ARCH_RPC
 254         bool "RiscPC"
 255         select ARCH_ACORN
 256         select FIQ
 257         select TIMER_ACORN
 258         select ARCH_MAY_HAVE_PC_FDC
 259         select ISA_DMA_API
 260         help
 261           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 262           CD-ROM interface, serial and parallel port, and the floppy drive.
 263
 264 config ARCH_SA1100
 265         bool "SA1100-based"
 266         select ISA
 267         select ARCH_DISCONTIGMEM_ENABLE
 268         select ARCH_MTD_XIP
 269         help
 270           Support for StrongARM 11x0 based boards.
 271
 272 config ARCH_S3C2410
 273         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
 274         help
 275           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 276           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 277           the Samsung SMDK2410 development board (and derivatives).
 278
 279 config ARCH_SHARK
 280         bool "Shark"
 281         select ISA
 282         select ISA_DMA
 283         select PCI
 284         help
 285           Support for the StrongARM based Digital DNARD machine, also known
 286           as "Shark" (<http://www.shark-linux.de/shark.html>).
 287
 288 config ARCH_LH7A40X
 289         bool "Sharp LH7A40X"
 290         help
 291           Say Y here for systems based on one of the Sharp LH7A40X
 292           System on a Chip processors.  These CPUs include an ARM922T
 293           core with a wide array of integrated devices for
 294           hand-held and low-power applications.
 295
 296 config ARCH_OMAP
 297         bool "TI OMAP"
 298         help
 299           Support for TI's OMAP platform (OMAP1 and OMAP2).
 300
 301 endchoice
 302
 303 source "arch/arm/mach-clps711x/Kconfig"
 304
 305 source "arch/arm/mach-ep93xx/Kconfig"
 306
 307 source "arch/arm/mach-footbridge/Kconfig"
 308
 309 source "arch/arm/mach-integrator/Kconfig"
 310
 311 source "arch/arm/mach-iop3xx/Kconfig"
 312
 313 source "arch/arm/mach-ixp4xx/Kconfig"
 314
 315 source "arch/arm/mach-ixp2000/Kconfig"
 316
 317 source "arch/arm/mach-ixp23xx/Kconfig"
 318
 319 source "arch/arm/mach-pxa/Kconfig"
 320
 321 source "arch/arm/mach-sa1100/Kconfig"
 322
 323 source "arch/arm/plat-omap/Kconfig"
 324
 325 source "arch/arm/mach-omap1/Kconfig"
 326
 327 source "arch/arm/mach-omap2/Kconfig"
 328
 329 source "arch/arm/mach-s3c2410/Kconfig"
 330
 331 source "arch/arm/mach-lh7a40x/Kconfig"
 332
 333 source "arch/arm/mach-imx/Kconfig"
 334
 335 source "arch/arm/mach-h720x/Kconfig"
 336
 337 source "arch/arm/mach-versatile/Kconfig"
 338
 339 source "arch/arm/mach-aaec2000/Kconfig"
 340
 341 source "arch/arm/mach-realview/Kconfig"
 342
 343 source "arch/arm/mach-at91rm9200/Kconfig"
 344
 345 source "arch/arm/mach-netx/Kconfig"
 346
 347 # Definitions to make life easier
 348 config ARCH_ACORN
 349         bool
 350
 351 source arch/arm/mm/Kconfig
 352
 353 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 354 config XSCALE_PMU
 355         bool
 356         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 357         default y
 358
 359 if !MMU
 360 source "arch/arm/Kconfig-nommu"
 361 endif
 362
 363 endmenu
 364
 365 source "arch/arm/common/Kconfig"
 366
 367 config FORCE_MAX_ZONEORDER
 368         int
 369         depends on SA1111
 370         default "9"
 371
 372 menu "Bus support"
 373
 374 config ARM_AMBA
 375         bool
 376
 377 config ISA
 378         bool
 379         help
 380           Find out whether you have ISA slots on your motherboard.  ISA is the
 381           name of a bus system, i.e. the way the CPU talks to the other stuff
 382           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 383           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 384           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 385
 386 # Select ISA DMA controller support
 387 config ISA_DMA
 388         bool
 389         select ISA_DMA_API
 390
 391 # Select ISA DMA interface
 392 config ISA_DMA_API
 393         bool
 394
 395 config PCI
 396         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
 397         help
 398           Find out whether you have a PCI motherboard. PCI is the name of a
 399           bus system, i.e. the way the CPU talks to the other stuff inside
 400           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 401           VESA. If you have PCI, say Y, otherwise N.
 402
 403           The PCI-HOWTO, available from
 404           <http://www.tldp.org/docs.html#howto>, contains valuable
 405           information about which PCI hardware does work under Linux and which
 406           doesn't.
 407
 408 # Select the host bridge type
 409 config PCI_HOST_VIA82C505
 410         bool
 411         depends on PCI && ARCH_SHARK
 412         default y
 413
 414 source "drivers/pci/Kconfig"
 415
 416 source "drivers/pcmcia/Kconfig"
 417
 418 endmenu
 419
 420 menu "Kernel Features"
 421
 422 config SMP
 423         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 424         depends on EXPERIMENTAL && REALVIEW_MPCORE
 425         help
 426           This enables support for systems with more than one CPU. If you have
 427           a system with only one CPU, like most personal computers, say N. If
 428           you have a system with more than one CPU, say Y.
 429
 430           If you say N here, the kernel will run on single and multiprocessor
 431           machines, but will use only one CPU of a multiprocessor machine. If
 432           you say Y here, the kernel will run on many, but not all, single
 433           processor machines. On a single processor machine, the kernel will
 434           run faster if you say N here.
 435
 436           See also the <file:Documentation/smp.txt>,
 437           <file:Documentation/i386/IO-APIC.txt>,
 438           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 439           <http://www.linuxdoc.org/docs.html#howto>.
 440
 441           If you don't know what to do here, say N.
 442
 443 config NR_CPUS
 444         int "Maximum number of CPUs (2-32)"
 445         range 2 32
 446         depends on SMP
 447         default "4"
 448
 449 config HOTPLUG_CPU
 450         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 451         depends on SMP && HOTPLUG && EXPERIMENTAL
 452         help
 453           Say Y here to experiment with turning CPUs off and on.  CPUs
 454           can be controlled through /sys/devices/system/cpu.
 455
 456 config LOCAL_TIMERS
 457         bool "Use local timer interrupts"
 458         depends on SMP && REALVIEW_MPCORE
 459         default y
 460         help
 461           Enable support for local timers on SMP platforms, rather then the
 462           legacy IPI broadcast method.  Local timers allows the system
 463           accounting to be spread across the timer interval, preventing a
 464           "thundering herd" at every timer tick.
 465
 466 config PREEMPT
 467         bool "Preemptible Kernel (EXPERIMENTAL)"
 468         depends on EXPERIMENTAL
 469         help
 470           This option reduces the latency of the kernel when reacting to
 471           real-time or interactive events by allowing a low priority process to
 472           be preempted even if it is in kernel mode executing a system call.
 473           This allows applications to run more reliably even when the system is
 474           under load.
 475
 476           Say Y here if you are building a kernel for a desktop, embedded
 477           or real-time system.  Say N if you are unsure.
 478
 479 config NO_IDLE_HZ
 480         bool "Dynamic tick timer"
 481         help
 482           Select this option if you want to disable continuous timer ticks
 483           and have them programmed to occur as required. This option saves
 484           power as the system can remain in idle state for longer.
 485
 486           By default dynamic tick is disabled during the boot, and can be
 487           manually enabled with:
 488
 489             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 490
 491           Alternatively, if you want dynamic tick automatically enabled
 492           during boot, pass "dyntick=enable" via the kernel command string.
 493
 494           Please note that dynamic tick may affect the accuracy of
 495           timekeeping on some platforms depending on the implementation.
 496           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 497           to have accurate timekeeping with dynamic tick.
 498
 499 config HZ
 500         int
 501         default 128 if ARCH_L7200
 502         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 503         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 504         default 100
 505
 506 config AEABI
 507         bool "Use the ARM EABI to compile the kernel"
 508         help
 509           This option allows for the kernel to be compiled using the latest
 510           ARM ABI (aka EABI).  This is only useful if you are using a user
 511           space environment that is also compiled with EABI.
 512
 513           Since there are major incompatibilities between the legacy ABI and
 514           EABI, especially with regard to structure member alignment, this
 515           option also changes the kernel syscall calling convention to
 516           disambiguate both ABIs and allow for backward compatibility support
 517           (selected with CONFIG_OABI_COMPAT).
 518
 519           To use this you need GCC version 4.0.0 or later.
 520
 521 config OABI_COMPAT
 522         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 523         depends on AEABI && EXPERIMENTAL
 524         default y
 525         help
 526           This option preserves the old syscall interface along with the
 527           new (ARM EABI) one. It also provides a compatibility layer to
 528           intercept syscalls that have structure arguments which layout
 529           in memory differs between the legacy ABI and the new ARM EABI
 530           (only for non "thumb" binaries). This option adds a tiny
 531           overhead to all syscalls and produces a slightly larger kernel.
 532           If you know you'll be using only pure EABI user space then you
 533           can say N here. If this option is not selected and you attempt
 534           to execute a legacy ABI binary then the result will be
 535           UNPREDICTABLE (in fact it can be predicted that it won't work
 536           at all). If in doubt say Y.
 537
 538 config ARCH_DISCONTIGMEM_ENABLE
 539         bool
 540         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 541         help
 542           Say Y to support efficient handling of discontiguous physical memory,
 543           for architectures which are either NUMA (Non-Uniform Memory Access)
 544           or have huge holes in the physical address space for other reasons.
 545           See <file:Documentation/vm/numa> for more.
 546
 547 config NODES_SHIFT
 548         int
 549         default "4" if ARCH_LH7A40X
 550         default "2"
 551         depends on NEED_MULTIPLE_NODES
 552
 553 source "mm/Kconfig"
 554
 555 config LEDS
 556         bool "Timer and CPU usage LEDs"
 557         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 558                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 559                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 560                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 561                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 562                    ARCH_AT91RM9200 || MACH_TRIZEPS4
 563         help
 564           If you say Y here, the LEDs on your machine will be used
 565           to provide useful information about your current system status.
 566
 567           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 568           be able to select which LEDs are active using the options below. If
 569           you are compiling a kernel for the EBSA-110 or the LART however, the
 570           red LED will simply flash regularly to indicate that the system is
 571           still functional. It is safe to say Y here if you have a CATS
 572           system, but the driver will do nothing.
 573
 574 config LEDS_TIMER
 575         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 576                             MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 577         depends on LEDS
 578         default y if ARCH_EBSA110
 579         help
 580           If you say Y here, one of the system LEDs (the green one on the
 581           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 582           will flash regularly to indicate that the system is still
 583           operational. This is mainly useful to kernel hackers who are
 584           debugging unstable kernels.
 585
 586           The LART uses the same LED for both Timer LED and CPU usage LED
 587           functions. You may choose to use both, but the Timer LED function
 588           will overrule the CPU usage LED.
 589
 590 config LEDS_CPU
 591         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 592                         !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 593         depends on LEDS
 594         help
 595           If you say Y here, the red LED will be used to give a good real
 596           time indication of CPU usage, by lighting whenever the idle task
 597           is not currently executing.
 598
 599           The LART uses the same LED for both Timer LED and CPU usage LED
 600           functions. You may choose to use both, but the Timer LED function
 601           will overrule the CPU usage LED.
 602
 603 config ALIGNMENT_TRAP
 604         bool
 605         default y if !ARCH_EBSA110
 606         help
 607           ARM processors can not fetch/store information which is not
 608           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 609           address divisible by 4. On 32-bit ARM processors, these non-aligned
 610           fetch/store instructions will be emulated in software if you say
 611           here, which has a severe performance impact. This is necessary for
 612           correct operation of some network protocols. With an IP-only
 613           configuration it is safe to say N, otherwise say Y.
 614
 615 endmenu
 616
 617 menu "Boot options"
 618
 619 # Compressed boot loader in ROM.  Yes, we really want to ask about
 620 # TEXT and BSS so we preserve their values in the config files.
 621 config ZBOOT_ROM_TEXT
 622         hex "Compressed ROM boot loader base address"
 623         default "0"
 624         help
 625           The physical address at which the ROM-able zImage is to be
 626           placed in the target.  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_BSS
 633         hex "Compressed ROM boot loader BSS address"
 634         default "0"
 635         help
 636           The base address of 64KiB of read/write memory in the target
 637           for the ROM-able zImage, which must be available while the
 638           decompressor is running.  Platforms which normally make use of
 639           ROM-able zImage formats normally set this to a suitable
 640           value in their defconfig file.
 641
 642           If ZBOOT_ROM is not enabled, this has no effect.
 643
 644 config ZBOOT_ROM
 645         bool "Compressed boot loader in ROM/flash"
 646         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 647         help
 648           Say Y here if you intend to execute your compressed kernel image
 649           (zImage) directly from ROM or flash.  If unsure, say N.
 650
 651 config CMDLINE
 652         string "Default kernel command string"
 653         default ""
 654         help
 655           On some architectures (EBSA110 and CATS), there is currently no way
 656           for the boot loader to pass arguments to the kernel. For these
 657           architectures, you should supply some command-line options at build
 658           time by entering them here. As a minimum, you should specify the
 659           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 660
 661 config XIP_KERNEL
 662         bool "Kernel Execute-In-Place from ROM"
 663         depends on !ZBOOT_ROM
 664         help
 665           Execute-In-Place allows the kernel to run from non-volatile storage
 666           directly addressable by the CPU, such as NOR flash. This saves RAM
 667           space since the text section of the kernel is not loaded from flash
 668           to RAM.  Read-write sections, such as the data section and stack,
 669           are still copied to RAM.  The XIP kernel is not compressed since
 670           it has to run directly from flash, so it will take more space to
 671           store it.  The flash address used to link the kernel object files,
 672           and for storing it, is configuration dependent. Therefore, if you
 673           say Y here, you must know the proper physical address where to
 674           store the kernel image depending on your own flash memory usage.
 675
 676           Also note that the make target becomes "make xipImage" rather than
 677           "make zImage" or "make Image".  The final kernel binary to put in
 678           ROM memory will be arch/arm/boot/xipImage.
 679
 680           If unsure, say N.
 681
 682 config XIP_PHYS_ADDR
 683         hex "XIP Kernel Physical Location"
 684         depends on XIP_KERNEL
 685         default "0x00080000"
 686         help
 687           This is the physical address in your flash memory the kernel will
 688           be linked for and stored to.  This address is dependent on your
 689           own flash usage.
 690
 691 endmenu
 692
 693 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP)
 694
 695 menu "CPU Frequency scaling"
 696
 697 source "drivers/cpufreq/Kconfig"
 698
 699 config CPU_FREQ_SA1100
 700         bool
 701         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 702         default y
 703
 704 config CPU_FREQ_SA1110
 705         bool
 706         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 707         default y
 708
 709 config CPU_FREQ_INTEGRATOR
 710         tristate "CPUfreq driver for ARM Integrator CPUs"
 711         depends on ARCH_INTEGRATOR && CPU_FREQ
 712         default y
 713         help
 714           This enables the CPUfreq driver for ARM Integrator CPUs.
 715
 716           For details, take a look at <file:Documentation/cpu-freq>.
 717
 718           If in doubt, say Y.
 719
 720 endmenu
 721
 722 endif
 723
 724 menu "Floating point emulation"
 725
 726 comment "At least one emulation must be selected"
 727
 728 config FPE_NWFPE
 729         bool "NWFPE math emulation"
 730         depends on !AEABI || OABI_COMPAT
 731         ---help---
 732           Say Y to include the NWFPE floating point emulator in the kernel.
 733           This is necessary to run most binaries. Linux does not currently
 734           support floating point hardware so you need to say Y here even if
 735           your machine has an FPA or floating point co-processor podule.
 736
 737           You may say N here if you are going to load the Acorn FPEmulator
 738           early in the bootup.
 739
 740 config FPE_NWFPE_XP
 741         bool "Support extended precision"
 742         depends on FPE_NWFPE
 743         help
 744           Say Y to include 80-bit support in the kernel floating-point
 745           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 746           Note that gcc does not generate 80-bit operations by default,
 747           so in most cases this option only enlarges the size of the
 748           floating point emulator without any good reason.
 749
 750           You almost surely want to say N here.
 751
 752 config FPE_FASTFPE
 753         bool "FastFPE math emulation (EXPERIMENTAL)"
 754         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 755         ---help---
 756           Say Y here to include the FAST floating point emulator in the kernel.
 757           This is an experimental much faster emulator which now also has full
 758           precision for the mantissa.  It does not support any exceptions.
 759           It is very simple, and approximately 3-6 times faster than NWFPE.
 760
 761           It should be sufficient for most programs.  It may be not suitable
 762           for scientific calculations, but you have to check this for yourself.
 763           If you do not feel you need a faster FP emulation you should better
 764           choose NWFPE.
 765
 766 config VFP
 767         bool "VFP-format floating point maths"
 768         depends on CPU_V6 || CPU_ARM926T
 769         help
 770           Say Y to include VFP support code in the kernel. This is needed
 771           if your hardware includes a VFP unit.
 772
 773           Please see <file:Documentation/arm/VFP/release-notes.txt> for
 774           release notes and additional status information.
 775
 776           Say N if your target does not have VFP hardware.
 777
 778 endmenu
 779
 780 menu "Userspace binary formats"
 781
 782 source "fs/Kconfig.binfmt"
 783
 784 config ARTHUR
 785         tristate "RISC OS personality"
 786         depends on !AEABI
 787         help
 788           Say Y here to include the kernel code necessary if you want to run
 789           Acorn RISC OS/Arthur binaries under Linux. This code is still very
 790           experimental; if this sounds frightening, say N and sleep in peace.
 791           You can also say M here to compile this support as a module (which
 792           will be called arthur).
 793
 794 endmenu
 795
 796 menu "Power management options"
 797
 798 source "kernel/power/Kconfig"
 799
 800 config APM
 801         tristate "Advanced Power Management Emulation"
 802         ---help---
 803           APM is a BIOS specification for saving power using several different
 804           techniques. This is mostly useful for battery powered laptops with
 805           APM compliant BIOSes. If you say Y here, the system time will be
 806           reset after a RESUME operation, the /proc/apm device will provide
 807           battery status information, and user-space programs will receive
 808           notification of APM "events" (e.g. battery status change).
 809
 810           In order to use APM, you will need supporting software. For location
 811           and more information, read <file:Documentation/pm.txt> and the
 812           Battery Powered Linux mini-HOWTO, available from
 813           <http://www.tldp.org/docs.html#howto>.
 814
 815           This driver does not spin down disk drives (see the hdparm(8)
 816           manpage ("man 8 hdparm") for that), and it doesn't turn off
 817           VESA-compliant "green" monitors.
 818
 819           Generally, if you don't have a battery in your machine, there isn't
 820           much point in using this driver and you should say N. If you get
 821           random kernel OOPSes or reboots that don't seem to be related to
 822           anything, try disabling/enabling this option (or disabling/enabling
 823           APM in your BIOS).
 824
 825 endmenu
 826
 827 source "net/Kconfig"
 828
 829 menu "Device Drivers"
 830
 831 source "drivers/base/Kconfig"
 832
 833 source "drivers/connector/Kconfig"
 834
 835 if ALIGNMENT_TRAP
 836 source "drivers/mtd/Kconfig"
 837 endif
 838
 839 source "drivers/parport/Kconfig"
 840
 841 source "drivers/pnp/Kconfig"
 842
 843 source "drivers/block/Kconfig"
 844
 845 source "drivers/acorn/block/Kconfig"
 846
 847 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
 848         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
 849         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
 850         || ARCH_IXP23XX
 851 source "drivers/ide/Kconfig"
 852 endif
 853
 854 source "drivers/scsi/Kconfig"
 855
 856 source "drivers/md/Kconfig"
 857
 858 source "drivers/message/fusion/Kconfig"
 859
 860 source "drivers/ieee1394/Kconfig"
 861
 862 source "drivers/message/i2o/Kconfig"
 863
 864 source "drivers/net/Kconfig"
 865
 866 source "drivers/isdn/Kconfig"
 867
 868 # input before char - char/joystick depends on it. As does USB.
 869
 870 source "drivers/input/Kconfig"
 871
 872 source "drivers/char/Kconfig"
 873
 874 source "drivers/i2c/Kconfig"
 875
 876 source "drivers/spi/Kconfig"
 877
 878 source "drivers/w1/Kconfig"
 879
 880 source "drivers/hwmon/Kconfig"
 881
 882 #source "drivers/l3/Kconfig"
 883
 884 source "drivers/misc/Kconfig"
 885
 886 source "drivers/mfd/Kconfig"
 887
 888 source "drivers/leds/Kconfig"
 889
 890 source "drivers/media/Kconfig"
 891
 892 source "drivers/video/Kconfig"
 893
 894 source "sound/Kconfig"
 895
 896 source "drivers/usb/Kconfig"
 897
 898 source "drivers/mmc/Kconfig"
 899
 900 source "drivers/rtc/Kconfig"
 901
 902 endmenu
 903
 904 source "fs/Kconfig"
 905
 906 source "arch/arm/oprofile/Kconfig"
 907
 908 source "arch/arm/Kconfig.debug"
 909
 910 source "security/Kconfig"
 911
 912 source "crypto/Kconfig"
 913
 914 source "lib/Kconfig"