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 TRACE_IRQFLAGS_SUPPORT
  55         bool
  56         default y
  57
  58 config HARDIRQS_SW_RESEND
  59         bool
  60         default y
  61
  62 config GENERIC_IRQ_PROBE
  63         bool
  64         default y
  65
  66 config RWSEM_GENERIC_SPINLOCK
  67         bool
  68         default y
  69
  70 config RWSEM_XCHGADD_ALGORITHM
  71         bool
  72
  73 config GENERIC_HWEIGHT
  74         bool
  75         default y
  76
  77 config GENERIC_CALIBRATE_DELAY
  78         bool
  79         default y
  80
  81 config GENERIC_BUST_SPINLOCK
  82         bool
  83
  84 config ARCH_MAY_HAVE_PC_FDC
  85         bool
  86
  87 config GENERIC_ISA_DMA
  88         bool
  89
  90 config FIQ
  91         bool
  92
  93 config ARCH_MTD_XIP
  94         bool
  95
  96 config VECTORS_BASE
  97         hex
  98         default 0xffff0000 if MMU
  99         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 100         default 0x00000000
 101         help
 102           The base address of exception vectors.
 103
 104 source "init/Kconfig"
 105
 106 menu "System Type"
 107
 108 choice
 109         prompt "ARM system type"
 110         default ARCH_VERSATILE
 111
 112 config ARCH_AAEC2000
 113         bool "Agilent AAEC-2000 based"
 114         select ARM_AMBA
 115         help
 116           This enables support for systems based on the Agilent AAEC-2000
 117
 118 config ARCH_INTEGRATOR
 119         bool "ARM Ltd. Integrator family"
 120         select ARM_AMBA
 121         select ICST525
 122         help
 123           Support for ARM's Integrator platform.
 124
 125 config ARCH_REALVIEW
 126         bool "ARM Ltd. RealView family"
 127         select ARM_AMBA
 128         select ICST307
 129         help
 130           This enables support for ARM Ltd RealView boards.
 131
 132 config ARCH_VERSATILE
 133         bool "ARM Ltd. Versatile family"
 134         select ARM_AMBA
 135         select ARM_VIC
 136         select ICST307
 137         help
 138           This enables support for ARM Ltd Versatile board.
 139
 140 config ARCH_AT91
 141         bool "Atmel AT91"
 142         help
 143           This enables support for systems based on the Atmel AT91RM9200
 144           and AT91SAM9xxx processors.
 145
 146 config ARCH_CLPS7500
 147         bool "Cirrus CL-PS7500FE"
 148         select TIMER_ACORN
 149         select ISA
 150         help
 151           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 152
 153 config ARCH_CLPS711X
 154         bool "Cirrus Logic CLPS711x/EP721x-based"
 155         help
 156           Support for Cirrus Logic 711x/721x based boards.
 157
 158 config ARCH_CO285
 159         bool "Co-EBSA285"
 160         select FOOTBRIDGE
 161         select FOOTBRIDGE_ADDIN
 162         help
 163           Support for Intel's EBSA285 companion chip.
 164
 165 config ARCH_EBSA110
 166         bool "EBSA-110"
 167         select ISA
 168         help
 169           This is an evaluation board for the StrongARM processor available
 170           from Digital. It has limited hardware on-board, including an
 171           Ethernet interface, two PCMCIA sockets, two serial ports and a
 172           parallel port.
 173
 174 config ARCH_EP93XX
 175         bool "EP93xx-based"
 176         select ARM_AMBA
 177         select ARM_VIC
 178         help
 179           This enables support for the Cirrus EP93xx series of CPUs.
 180
 181 config ARCH_FOOTBRIDGE
 182         bool "FootBridge"
 183         select FOOTBRIDGE
 184         help
 185           Support for systems based on the DC21285 companion chip
 186           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 187
 188 config ARCH_NETX
 189         bool "Hilscher NetX based"
 190         select ARM_VIC
 191         help
 192           This enables support for systems based on the Hilscher NetX Soc
 193
 194 config ARCH_H720X
 195         bool "Hynix HMS720x-based"
 196         select ISA_DMA_API
 197         help
 198           This enables support for systems based on the Hynix HMS720x
 199
 200 config ARCH_IMX
 201         bool "IMX"
 202         help
 203           Support for Motorola's i.MX family of processors (MX1, MXL).
 204
 205 config ARCH_IOP32X
 206         bool "IOP32x-based"
 207         depends on MMU
 208         select PCI
 209         help
 210           Support for Intel's 80219 and IOP32X (XScale) family of
 211           processors.
 212
 213 config ARCH_IOP33X
 214         bool "IOP33x-based"
 215         depends on MMU
 216         select PCI
 217         help
 218           Support for Intel's IOP33X (XScale) family of processors.
 219
 220 config ARCH_IXP4XX
 221         bool "IXP4xx-based"
 222         depends on MMU
 223         help
 224           Support for Intel's IXP4XX (XScale) family of processors.
 225
 226 config ARCH_IXP2000
 227         bool "IXP2400/2800-based"
 228         depends on MMU
 229         select PCI
 230         help
 231           Support for Intel's IXP2400/2800 (XScale) family of processors.
 232
 233 config ARCH_IXP23XX
 234         bool "IXP23XX-based"
 235         depends on MMU
 236         select PCI
 237         help
 238           Support for Intel's IXP23xx (XScale) family of processors.
 239
 240 config ARCH_L7200
 241         bool "LinkUp-L7200"
 242         select FIQ
 243         help
 244           Say Y here if you intend to run this kernel on a LinkUp Systems
 245           L7200 Software Development Board which uses an ARM720T processor.
 246           Information on this board can be obtained at:
 247
 248           <http://www.linkupsys.com/>
 249
 250           If you have any questions or comments about the Linux kernel port
 251           to this board, send e-mail to <sjhill@cotw.com>.
 252
 253 config ARCH_PNX4008
 254         bool "Philips Nexperia PNX4008 Mobile"
 255         help
 256           This enables support for Philips PNX4008 mobile platform.
 257
 258 config ARCH_PXA
 259         bool "PXA2xx-based"
 260         depends on MMU
 261         select ARCH_MTD_XIP
 262         help
 263           Support for Intel's PXA2XX processor line.
 264
 265 config ARCH_RPC
 266         bool "RiscPC"
 267         select ARCH_ACORN
 268         select FIQ
 269         select TIMER_ACORN
 270         select ARCH_MAY_HAVE_PC_FDC
 271         select ISA_DMA_API
 272         help
 273           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 274           CD-ROM interface, serial and parallel port, and the floppy drive.
 275
 276 config ARCH_SA1100
 277         bool "SA1100-based"
 278         select ISA
 279         select ARCH_DISCONTIGMEM_ENABLE
 280         select ARCH_MTD_XIP
 281         help
 282           Support for StrongARM 11x0 based boards.
 283
 284 config ARCH_S3C2410
 285         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
 286         help
 287           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 288           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 289           the Samsung SMDK2410 development board (and derivatives).
 290
 291 config ARCH_SHARK
 292         bool "Shark"
 293         select ISA
 294         select ISA_DMA
 295         select PCI
 296         help
 297           Support for the StrongARM based Digital DNARD machine, also known
 298           as "Shark" (<http://www.shark-linux.de/shark.html>).
 299
 300 config ARCH_LH7A40X
 301         bool "Sharp LH7A40X"
 302         help
 303           Say Y here for systems based on one of the Sharp LH7A40X
 304           System on a Chip processors.  These CPUs include an ARM922T
 305           core with a wide array of integrated devices for
 306           hand-held and low-power applications.
 307
 308 config ARCH_OMAP
 309         bool "TI OMAP"
 310         help
 311           Support for TI's OMAP platform (OMAP1 and OMAP2).
 312
 313 endchoice
 314
 315 source "arch/arm/mach-clps711x/Kconfig"
 316
 317 source "arch/arm/mach-ep93xx/Kconfig"
 318
 319 source "arch/arm/mach-footbridge/Kconfig"
 320
 321 source "arch/arm/mach-integrator/Kconfig"
 322
 323 source "arch/arm/mach-iop32x/Kconfig"
 324
 325 source "arch/arm/mach-iop33x/Kconfig"
 326
 327 source "arch/arm/mach-ixp4xx/Kconfig"
 328
 329 source "arch/arm/mach-ixp2000/Kconfig"
 330
 331 source "arch/arm/mach-ixp23xx/Kconfig"
 332
 333 source "arch/arm/mach-pxa/Kconfig"
 334
 335 source "arch/arm/mach-sa1100/Kconfig"
 336
 337 source "arch/arm/plat-omap/Kconfig"
 338
 339 source "arch/arm/mach-omap1/Kconfig"
 340
 341 source "arch/arm/mach-omap2/Kconfig"
 342
 343 source "arch/arm/mach-s3c2410/Kconfig"
 344
 345 source "arch/arm/mach-lh7a40x/Kconfig"
 346
 347 source "arch/arm/mach-imx/Kconfig"
 348
 349 source "arch/arm/mach-h720x/Kconfig"
 350
 351 source "arch/arm/mach-versatile/Kconfig"
 352
 353 source "arch/arm/mach-aaec2000/Kconfig"
 354
 355 source "arch/arm/mach-realview/Kconfig"
 356
 357 source "arch/arm/mach-at91rm9200/Kconfig"
 358
 359 source "arch/arm/mach-netx/Kconfig"
 360
 361 # Definitions to make life easier
 362 config ARCH_ACORN
 363         bool
 364
 365 source arch/arm/mm/Kconfig
 366
 367 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 368 config XSCALE_PMU
 369         bool
 370         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 371         default y
 372
 373 if !MMU
 374 source "arch/arm/Kconfig-nommu"
 375 endif
 376
 377 endmenu
 378
 379 source "arch/arm/common/Kconfig"
 380
 381 config FORCE_MAX_ZONEORDER
 382         int
 383         depends on SA1111
 384         default "9"
 385
 386 menu "Bus support"
 387
 388 config ARM_AMBA
 389         bool
 390
 391 config ISA
 392         bool
 393         help
 394           Find out whether you have ISA slots on your motherboard.  ISA is the
 395           name of a bus system, i.e. the way the CPU talks to the other stuff
 396           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 397           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 398           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 399
 400 # Select ISA DMA controller support
 401 config ISA_DMA
 402         bool
 403         select ISA_DMA_API
 404
 405 # Select ISA DMA interface
 406 config ISA_DMA_API
 407         bool
 408
 409 config PCI
 410         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
 411         help
 412           Find out whether you have a PCI motherboard. PCI is the name of a
 413           bus system, i.e. the way the CPU talks to the other stuff inside
 414           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 415           VESA. If you have PCI, say Y, otherwise N.
 416
 417           The PCI-HOWTO, available from
 418           <http://www.tldp.org/docs.html#howto>, contains valuable
 419           information about which PCI hardware does work under Linux and which
 420           doesn't.
 421
 422 # Select the host bridge type
 423 config PCI_HOST_VIA82C505
 424         bool
 425         depends on PCI && ARCH_SHARK
 426         default y
 427
 428 source "drivers/pci/Kconfig"
 429
 430 source "drivers/pcmcia/Kconfig"
 431
 432 endmenu
 433
 434 menu "Kernel Features"
 435
 436 config SMP
 437         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 438         depends on EXPERIMENTAL && REALVIEW_MPCORE
 439         help
 440           This enables support for systems with more than one CPU. If you have
 441           a system with only one CPU, like most personal computers, say N. If
 442           you have a system with more than one CPU, say Y.
 443
 444           If you say N here, the kernel will run on single and multiprocessor
 445           machines, but will use only one CPU of a multiprocessor machine. If
 446           you say Y here, the kernel will run on many, but not all, single
 447           processor machines. On a single processor machine, the kernel will
 448           run faster if you say N here.
 449
 450           See also the <file:Documentation/smp.txt>,
 451           <file:Documentation/i386/IO-APIC.txt>,
 452           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 453           <http://www.linuxdoc.org/docs.html#howto>.
 454
 455           If you don't know what to do here, say N.
 456
 457 config NR_CPUS
 458         int "Maximum number of CPUs (2-32)"
 459         range 2 32
 460         depends on SMP
 461         default "4"
 462
 463 config HOTPLUG_CPU
 464         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 465         depends on SMP && HOTPLUG && EXPERIMENTAL
 466         help
 467           Say Y here to experiment with turning CPUs off and on.  CPUs
 468           can be controlled through /sys/devices/system/cpu.
 469
 470 config LOCAL_TIMERS
 471         bool "Use local timer interrupts"
 472         depends on SMP && REALVIEW_MPCORE
 473         default y
 474         help
 475           Enable support for local timers on SMP platforms, rather then the
 476           legacy IPI broadcast method.  Local timers allows the system
 477           accounting to be spread across the timer interval, preventing a
 478           "thundering herd" at every timer tick.
 479
 480 config PREEMPT
 481         bool "Preemptible Kernel (EXPERIMENTAL)"
 482         depends on EXPERIMENTAL
 483         help
 484           This option reduces the latency of the kernel when reacting to
 485           real-time or interactive events by allowing a low priority process to
 486           be preempted even if it is in kernel mode executing a system call.
 487           This allows applications to run more reliably even when the system is
 488           under load.
 489
 490           Say Y here if you are building a kernel for a desktop, embedded
 491           or real-time system.  Say N if you are unsure.
 492
 493 config NO_IDLE_HZ
 494         bool "Dynamic tick timer"
 495         help
 496           Select this option if you want to disable continuous timer ticks
 497           and have them programmed to occur as required. This option saves
 498           power as the system can remain in idle state for longer.
 499
 500           By default dynamic tick is disabled during the boot, and can be
 501           manually enabled with:
 502
 503             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 504
 505           Alternatively, if you want dynamic tick automatically enabled
 506           during boot, pass "dyntick=enable" via the kernel command string.
 507
 508           Please note that dynamic tick may affect the accuracy of
 509           timekeeping on some platforms depending on the implementation.
 510           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 511           to have accurate timekeeping with dynamic tick.
 512
 513 config HZ
 514         int
 515         default 128 if ARCH_L7200
 516         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 517         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 518         default 100
 519
 520 config AEABI
 521         bool "Use the ARM EABI to compile the kernel"
 522         help
 523           This option allows for the kernel to be compiled using the latest
 524           ARM ABI (aka EABI).  This is only useful if you are using a user
 525           space environment that is also compiled with EABI.
 526
 527           Since there are major incompatibilities between the legacy ABI and
 528           EABI, especially with regard to structure member alignment, this
 529           option also changes the kernel syscall calling convention to
 530           disambiguate both ABIs and allow for backward compatibility support
 531           (selected with CONFIG_OABI_COMPAT).
 532
 533           To use this you need GCC version 4.0.0 or later.
 534
 535 config OABI_COMPAT
 536         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 537         depends on AEABI && EXPERIMENTAL
 538         default y
 539         help
 540           This option preserves the old syscall interface along with the
 541           new (ARM EABI) one. It also provides a compatibility layer to
 542           intercept syscalls that have structure arguments which layout
 543           in memory differs between the legacy ABI and the new ARM EABI
 544           (only for non "thumb" binaries). This option adds a tiny
 545           overhead to all syscalls and produces a slightly larger kernel.
 546           If you know you'll be using only pure EABI user space then you
 547           can say N here. If this option is not selected and you attempt
 548           to execute a legacy ABI binary then the result will be
 549           UNPREDICTABLE (in fact it can be predicted that it won't work
 550           at all). If in doubt say Y.
 551
 552 config ARCH_DISCONTIGMEM_ENABLE
 553         bool
 554         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 555         help
 556           Say Y to support efficient handling of discontiguous physical memory,
 557           for architectures which are either NUMA (Non-Uniform Memory Access)
 558           or have huge holes in the physical address space for other reasons.
 559           See <file:Documentation/vm/numa> for more.
 560
 561 config NODES_SHIFT
 562         int
 563         default "4" if ARCH_LH7A40X
 564         default "2"
 565         depends on NEED_MULTIPLE_NODES
 566
 567 source "mm/Kconfig"
 568
 569 config LEDS
 570         bool "Timer and CPU usage LEDs"
 571         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 572                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 573                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 574                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 575                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 576                    ARCH_AT91RM9200 || MACH_TRIZEPS4
 577         help
 578           If you say Y here, the LEDs on your machine will be used
 579           to provide useful information about your current system status.
 580
 581           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 582           be able to select which LEDs are active using the options below. If
 583           you are compiling a kernel for the EBSA-110 or the LART however, the
 584           red LED will simply flash regularly to indicate that the system is
 585           still functional. It is safe to say Y here if you have a CATS
 586           system, but the driver will do nothing.
 587
 588 config LEDS_TIMER
 589         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 590                             MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 591         depends on LEDS
 592         default y if ARCH_EBSA110
 593         help
 594           If you say Y here, one of the system LEDs (the green one on the
 595           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 596           will flash regularly to indicate that the system is still
 597           operational. This is mainly useful to kernel hackers who are
 598           debugging unstable kernels.
 599
 600           The LART uses the same LED for both Timer LED and CPU usage LED
 601           functions. You may choose to use both, but the Timer LED function
 602           will overrule the CPU usage LED.
 603
 604 config LEDS_CPU
 605         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 606                         !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 607         depends on LEDS
 608         help
 609           If you say Y here, the red LED will be used to give a good real
 610           time indication of CPU usage, by lighting whenever the idle task
 611           is not currently executing.
 612
 613           The LART uses the same LED for both Timer LED and CPU usage LED
 614           functions. You may choose to use both, but the Timer LED function
 615           will overrule the CPU usage LED.
 616
 617 config ALIGNMENT_TRAP
 618         bool
 619         default y if !ARCH_EBSA110
 620         help
 621           ARM processors can not fetch/store information which is not
 622           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 623           address divisible by 4. On 32-bit ARM processors, these non-aligned
 624           fetch/store instructions will be emulated in software if you say
 625           here, which has a severe performance impact. This is necessary for
 626           correct operation of some network protocols. With an IP-only
 627           configuration it is safe to say N, otherwise say Y.
 628
 629 endmenu
 630
 631 menu "Boot options"
 632
 633 # Compressed boot loader in ROM.  Yes, we really want to ask about
 634 # TEXT and BSS so we preserve their values in the config files.
 635 config ZBOOT_ROM_TEXT
 636         hex "Compressed ROM boot loader base address"
 637         default "0"
 638         help
 639           The physical address at which the ROM-able zImage is to be
 640           placed in the target.  Platforms which normally make use of
 641           ROM-able zImage formats normally set this to a suitable
 642           value in their defconfig file.
 643
 644           If ZBOOT_ROM is not enabled, this has no effect.
 645
 646 config ZBOOT_ROM_BSS
 647         hex "Compressed ROM boot loader BSS address"
 648         default "0"
 649         help
 650           The base address of 64KiB of read/write memory in the target
 651           for the ROM-able zImage, which must be available while the
 652           decompressor is running.  Platforms which normally make use of
 653           ROM-able zImage formats normally set this to a suitable
 654           value in their defconfig file.
 655
 656           If ZBOOT_ROM is not enabled, this has no effect.
 657
 658 config ZBOOT_ROM
 659         bool "Compressed boot loader in ROM/flash"
 660         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 661         help
 662           Say Y here if you intend to execute your compressed kernel image
 663           (zImage) directly from ROM or flash.  If unsure, say N.
 664
 665 config CMDLINE
 666         string "Default kernel command string"
 667         default ""
 668         help
 669           On some architectures (EBSA110 and CATS), there is currently no way
 670           for the boot loader to pass arguments to the kernel. For these
 671           architectures, you should supply some command-line options at build
 672           time by entering them here. As a minimum, you should specify the
 673           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 674
 675 config XIP_KERNEL
 676         bool "Kernel Execute-In-Place from ROM"
 677         depends on !ZBOOT_ROM
 678         help
 679           Execute-In-Place allows the kernel to run from non-volatile storage
 680           directly addressable by the CPU, such as NOR flash. This saves RAM
 681           space since the text section of the kernel is not loaded from flash
 682           to RAM.  Read-write sections, such as the data section and stack,
 683           are still copied to RAM.  The XIP kernel is not compressed since
 684           it has to run directly from flash, so it will take more space to
 685           store it.  The flash address used to link the kernel object files,
 686           and for storing it, is configuration dependent. Therefore, if you
 687           say Y here, you must know the proper physical address where to
 688           store the kernel image depending on your own flash memory usage.
 689
 690           Also note that the make target becomes "make xipImage" rather than
 691           "make zImage" or "make Image".  The final kernel binary to put in
 692           ROM memory will be arch/arm/boot/xipImage.
 693
 694           If unsure, say N.
 695
 696 config XIP_PHYS_ADDR
 697         hex "XIP Kernel Physical Location"
 698         depends on XIP_KERNEL
 699         default "0x00080000"
 700         help
 701           This is the physical address in your flash memory the kernel will
 702           be linked for and stored to.  This address is dependent on your
 703           own flash usage.
 704
 705 endmenu
 706
 707 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP)
 708
 709 menu "CPU Frequency scaling"
 710
 711 source "drivers/cpufreq/Kconfig"
 712
 713 config CPU_FREQ_SA1100
 714         bool
 715         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 716         default y
 717
 718 config CPU_FREQ_SA1110
 719         bool
 720         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 721         default y
 722
 723 config CPU_FREQ_INTEGRATOR
 724         tristate "CPUfreq driver for ARM Integrator CPUs"
 725         depends on ARCH_INTEGRATOR && CPU_FREQ
 726         default y
 727         help
 728           This enables the CPUfreq driver for ARM Integrator CPUs.
 729
 730           For details, take a look at <file:Documentation/cpu-freq>.
 731
 732           If in doubt, say Y.
 733
 734 endmenu
 735
 736 endif
 737
 738 menu "Floating point emulation"
 739
 740 comment "At least one emulation must be selected"
 741
 742 config FPE_NWFPE
 743         bool "NWFPE math emulation"
 744         depends on !AEABI || OABI_COMPAT
 745         ---help---
 746           Say Y to include the NWFPE floating point emulator in the kernel.
 747           This is necessary to run most binaries. Linux does not currently
 748           support floating point hardware so you need to say Y here even if
 749           your machine has an FPA or floating point co-processor podule.
 750
 751           You may say N here if you are going to load the Acorn FPEmulator
 752           early in the bootup.
 753
 754 config FPE_NWFPE_XP
 755         bool "Support extended precision"
 756         depends on FPE_NWFPE
 757         help
 758           Say Y to include 80-bit support in the kernel floating-point
 759           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 760           Note that gcc does not generate 80-bit operations by default,
 761           so in most cases this option only enlarges the size of the
 762           floating point emulator without any good reason.
 763
 764           You almost surely want to say N here.
 765
 766 config FPE_FASTFPE
 767         bool "FastFPE math emulation (EXPERIMENTAL)"
 768         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 769         ---help---
 770           Say Y here to include the FAST floating point emulator in the kernel.
 771           This is an experimental much faster emulator which now also has full
 772           precision for the mantissa.  It does not support any exceptions.
 773           It is very simple, and approximately 3-6 times faster than NWFPE.
 774
 775           It should be sufficient for most programs.  It may be not suitable
 776           for scientific calculations, but you have to check this for yourself.
 777           If you do not feel you need a faster FP emulation you should better
 778           choose NWFPE.
 779
 780 config VFP
 781         bool "VFP-format floating point maths"
 782         depends on CPU_V6 || CPU_ARM926T
 783         help
 784           Say Y to include VFP support code in the kernel. This is needed
 785           if your hardware includes a VFP unit.
 786
 787           Please see <file:Documentation/arm/VFP/release-notes.txt> for
 788           release notes and additional status information.
 789
 790           Say N if your target does not have VFP hardware.
 791
 792 endmenu
 793
 794 menu "Userspace binary formats"
 795
 796 source "fs/Kconfig.binfmt"
 797
 798 config ARTHUR
 799         tristate "RISC OS personality"
 800         depends on !AEABI
 801         help
 802           Say Y here to include the kernel code necessary if you want to run
 803           Acorn RISC OS/Arthur binaries under Linux. This code is still very
 804           experimental; if this sounds frightening, say N and sleep in peace.
 805           You can also say M here to compile this support as a module (which
 806           will be called arthur).
 807
 808 endmenu
 809
 810 menu "Power management options"
 811
 812 source "kernel/power/Kconfig"
 813
 814 config APM
 815         tristate "Advanced Power Management Emulation"
 816         ---help---
 817           APM is a BIOS specification for saving power using several different
 818           techniques. This is mostly useful for battery powered laptops with
 819           APM compliant BIOSes. If you say Y here, the system time will be
 820           reset after a RESUME operation, the /proc/apm device will provide
 821           battery status information, and user-space programs will receive
 822           notification of APM "events" (e.g. battery status change).
 823
 824           In order to use APM, you will need supporting software. For location
 825           and more information, read <file:Documentation/pm.txt> and the
 826           Battery Powered Linux mini-HOWTO, available from
 827           <http://www.tldp.org/docs.html#howto>.
 828
 829           This driver does not spin down disk drives (see the hdparm(8)
 830           manpage ("man 8 hdparm") for that), and it doesn't turn off
 831           VESA-compliant "green" monitors.
 832
 833           Generally, if you don't have a battery in your machine, there isn't
 834           much point in using this driver and you should say N. If you get
 835           random kernel OOPSes or reboots that don't seem to be related to
 836           anything, try disabling/enabling this option (or disabling/enabling
 837           APM in your BIOS).
 838
 839 endmenu
 840
 841 source "net/Kconfig"
 842
 843 menu "Device Drivers"
 844
 845 source "drivers/base/Kconfig"
 846
 847 source "drivers/connector/Kconfig"
 848
 849 if ALIGNMENT_TRAP
 850 source "drivers/mtd/Kconfig"
 851 endif
 852
 853 source "drivers/parport/Kconfig"
 854
 855 source "drivers/pnp/Kconfig"
 856
 857 source "drivers/block/Kconfig"
 858
 859 source "drivers/acorn/block/Kconfig"
 860
 861 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
 862         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
 863         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
 864         || ARCH_IXP23XX
 865 source "drivers/ide/Kconfig"
 866 endif
 867
 868 source "drivers/scsi/Kconfig"
 869
 870 source "drivers/md/Kconfig"
 871
 872 source "drivers/message/fusion/Kconfig"
 873
 874 source "drivers/ieee1394/Kconfig"
 875
 876 source "drivers/message/i2o/Kconfig"
 877
 878 source "drivers/net/Kconfig"
 879
 880 source "drivers/isdn/Kconfig"
 881
 882 # input before char - char/joystick depends on it. As does USB.
 883
 884 source "drivers/input/Kconfig"
 885
 886 source "drivers/char/Kconfig"
 887
 888 source "drivers/i2c/Kconfig"
 889
 890 source "drivers/spi/Kconfig"
 891
 892 source "drivers/w1/Kconfig"
 893
 894 source "drivers/hwmon/Kconfig"
 895
 896 #source "drivers/l3/Kconfig"
 897
 898 source "drivers/misc/Kconfig"
 899
 900 source "drivers/mfd/Kconfig"
 901
 902 source "drivers/leds/Kconfig"
 903
 904 source "drivers/media/Kconfig"
 905
 906 source "drivers/video/Kconfig"
 907
 908 source "sound/Kconfig"
 909
 910 source "drivers/usb/Kconfig"
 911
 912 source "drivers/mmc/Kconfig"
 913
 914 source "drivers/rtc/Kconfig"
 915
 916 endmenu
 917
 918 source "fs/Kconfig"
 919
 920 source "arch/arm/oprofile/Kconfig"
 921
 922 source "arch/arm/Kconfig.debug"
 923
 924 source "security/Kconfig"
 925
 926 source "crypto/Kconfig"
 927
 928 source "lib/Kconfig"