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 || CPU_HIGH_VECTOR
  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 PLAT_IOP
 209         select PCI
 210         help
 211           Support for Intel's 80219 and IOP32X (XScale) family of
 212           processors.
 213
 214 config ARCH_IOP33X
 215         bool "IOP33x-based"
 216         depends on MMU
 217         select PLAT_IOP
 218         select PCI
 219         help
 220           Support for Intel's IOP33X (XScale) family of processors.
 221
 222 config ARCH_IXP4XX
 223         bool "IXP4xx-based"
 224         depends on MMU
 225         help
 226           Support for Intel's IXP4XX (XScale) family of processors.
 227
 228 config ARCH_IXP2000
 229         bool "IXP2400/2800-based"
 230         depends on MMU
 231         select PCI
 232         help
 233           Support for Intel's IXP2400/2800 (XScale) family of processors.
 234
 235 config ARCH_IXP23XX
 236         bool "IXP23XX-based"
 237         depends on MMU
 238         select PCI
 239         help
 240           Support for Intel's IXP23xx (XScale) family of processors.
 241
 242 config ARCH_L7200
 243         bool "LinkUp-L7200"
 244         select FIQ
 245         help
 246           Say Y here if you intend to run this kernel on a LinkUp Systems
 247           L7200 Software Development Board which uses an ARM720T processor.
 248           Information on this board can be obtained at:
 249
 250           <http://www.linkupsys.com/>
 251
 252           If you have any questions or comments about the Linux kernel port
 253           to this board, send e-mail to <sjhill@cotw.com>.
 254
 255 config ARCH_PNX4008
 256         bool "Philips Nexperia PNX4008 Mobile"
 257         help
 258           This enables support for Philips PNX4008 mobile platform.
 259
 260 config ARCH_PXA
 261         bool "PXA2xx-based"
 262         depends on MMU
 263         select ARCH_MTD_XIP
 264         help
 265           Support for Intel's PXA2XX processor line.
 266
 267 config ARCH_RPC
 268         bool "RiscPC"
 269         select ARCH_ACORN
 270         select FIQ
 271         select TIMER_ACORN
 272         select ARCH_MAY_HAVE_PC_FDC
 273         select ISA_DMA_API
 274         help
 275           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 276           CD-ROM interface, serial and parallel port, and the floppy drive.
 277
 278 config ARCH_SA1100
 279         bool "SA1100-based"
 280         select ISA
 281         select ARCH_DISCONTIGMEM_ENABLE
 282         select ARCH_MTD_XIP
 283         help
 284           Support for StrongARM 11x0 based boards.
 285
 286 config ARCH_S3C2410
 287         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
 288         help
 289           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 290           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 291           the Samsung SMDK2410 development board (and derivatives).
 292
 293 config ARCH_SHARK
 294         bool "Shark"
 295         select ISA
 296         select ISA_DMA
 297         select PCI
 298         help
 299           Support for the StrongARM based Digital DNARD machine, also known
 300           as "Shark" (<http://www.shark-linux.de/shark.html>).
 301
 302 config ARCH_LH7A40X
 303         bool "Sharp LH7A40X"
 304         help
 305           Say Y here for systems based on one of the Sharp LH7A40X
 306           System on a Chip processors.  These CPUs include an ARM922T
 307           core with a wide array of integrated devices for
 308           hand-held and low-power applications.
 309
 310 config ARCH_OMAP
 311         bool "TI OMAP"
 312         help
 313           Support for TI's OMAP platform (OMAP1 and OMAP2).
 314
 315 endchoice
 316
 317 source "arch/arm/mach-clps711x/Kconfig"
 318
 319 source "arch/arm/mach-ep93xx/Kconfig"
 320
 321 source "arch/arm/mach-footbridge/Kconfig"
 322
 323 source "arch/arm/mach-integrator/Kconfig"
 324
 325 source "arch/arm/mach-iop32x/Kconfig"
 326
 327 source "arch/arm/mach-iop33x/Kconfig"
 328
 329 source "arch/arm/mach-ixp4xx/Kconfig"
 330
 331 source "arch/arm/mach-ixp2000/Kconfig"
 332
 333 source "arch/arm/mach-ixp23xx/Kconfig"
 334
 335 source "arch/arm/mach-pxa/Kconfig"
 336
 337 source "arch/arm/mach-sa1100/Kconfig"
 338
 339 source "arch/arm/plat-omap/Kconfig"
 340
 341 source "arch/arm/mach-omap1/Kconfig"
 342
 343 source "arch/arm/mach-omap2/Kconfig"
 344
 345 source "arch/arm/mach-s3c2410/Kconfig"
 346
 347 source "arch/arm/mach-lh7a40x/Kconfig"
 348
 349 source "arch/arm/mach-imx/Kconfig"
 350
 351 source "arch/arm/mach-h720x/Kconfig"
 352
 353 source "arch/arm/mach-versatile/Kconfig"
 354
 355 source "arch/arm/mach-aaec2000/Kconfig"
 356
 357 source "arch/arm/mach-realview/Kconfig"
 358
 359 source "arch/arm/mach-at91rm9200/Kconfig"
 360
 361 source "arch/arm/mach-netx/Kconfig"
 362
 363 # Definitions to make life easier
 364 config ARCH_ACORN
 365         bool
 366
 367 config PLAT_IOP
 368         bool
 369
 370 source arch/arm/mm/Kconfig
 371
 372 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 373 config XSCALE_PMU
 374         bool
 375         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 376         default y
 377
 378 if !MMU
 379 source "arch/arm/Kconfig-nommu"
 380 endif
 381
 382 endmenu
 383
 384 source "arch/arm/common/Kconfig"
 385
 386 config FORCE_MAX_ZONEORDER
 387         int
 388         depends on SA1111
 389         default "9"
 390
 391 menu "Bus support"
 392
 393 config ARM_AMBA
 394         bool
 395
 396 config ISA
 397         bool
 398         help
 399           Find out whether you have ISA slots on your motherboard.  ISA is the
 400           name of a bus system, i.e. the way the CPU talks to the other stuff
 401           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 402           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 403           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 404
 405 # Select ISA DMA controller support
 406 config ISA_DMA
 407         bool
 408         select ISA_DMA_API
 409
 410 # Select ISA DMA interface
 411 config ISA_DMA_API
 412         bool
 413
 414 config PCI
 415         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
 416         help
 417           Find out whether you have a PCI motherboard. PCI is the name of a
 418           bus system, i.e. the way the CPU talks to the other stuff inside
 419           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 420           VESA. If you have PCI, say Y, otherwise N.
 421
 422           The PCI-HOWTO, available from
 423           <http://www.tldp.org/docs.html#howto>, contains valuable
 424           information about which PCI hardware does work under Linux and which
 425           doesn't.
 426
 427 # Select the host bridge type
 428 config PCI_HOST_VIA82C505
 429         bool
 430         depends on PCI && ARCH_SHARK
 431         default y
 432
 433 source "drivers/pci/Kconfig"
 434
 435 source "drivers/pcmcia/Kconfig"
 436
 437 endmenu
 438
 439 menu "Kernel Features"
 440
 441 config SMP
 442         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 443         depends on EXPERIMENTAL && REALVIEW_MPCORE
 444         help
 445           This enables support for systems with more than one CPU. If you have
 446           a system with only one CPU, like most personal computers, say N. If
 447           you have a system with more than one CPU, say Y.
 448
 449           If you say N here, the kernel will run on single and multiprocessor
 450           machines, but will use only one CPU of a multiprocessor machine. If
 451           you say Y here, the kernel will run on many, but not all, single
 452           processor machines. On a single processor machine, the kernel will
 453           run faster if you say N here.
 454
 455           See also the <file:Documentation/smp.txt>,
 456           <file:Documentation/i386/IO-APIC.txt>,
 457           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 458           <http://www.linuxdoc.org/docs.html#howto>.
 459
 460           If you don't know what to do here, say N.
 461
 462 config NR_CPUS
 463         int "Maximum number of CPUs (2-32)"
 464         range 2 32
 465         depends on SMP
 466         default "4"
 467
 468 config HOTPLUG_CPU
 469         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 470         depends on SMP && HOTPLUG && EXPERIMENTAL
 471         help
 472           Say Y here to experiment with turning CPUs off and on.  CPUs
 473           can be controlled through /sys/devices/system/cpu.
 474
 475 config LOCAL_TIMERS
 476         bool "Use local timer interrupts"
 477         depends on SMP && REALVIEW_MPCORE
 478         default y
 479         help
 480           Enable support for local timers on SMP platforms, rather then the
 481           legacy IPI broadcast method.  Local timers allows the system
 482           accounting to be spread across the timer interval, preventing a
 483           "thundering herd" at every timer tick.
 484
 485 config PREEMPT
 486         bool "Preemptible Kernel (EXPERIMENTAL)"
 487         depends on EXPERIMENTAL
 488         help
 489           This option reduces the latency of the kernel when reacting to
 490           real-time or interactive events by allowing a low priority process to
 491           be preempted even if it is in kernel mode executing a system call.
 492           This allows applications to run more reliably even when the system is
 493           under load.
 494
 495           Say Y here if you are building a kernel for a desktop, embedded
 496           or real-time system.  Say N if you are unsure.
 497
 498 config NO_IDLE_HZ
 499         bool "Dynamic tick timer"
 500         help
 501           Select this option if you want to disable continuous timer ticks
 502           and have them programmed to occur as required. This option saves
 503           power as the system can remain in idle state for longer.
 504
 505           By default dynamic tick is disabled during the boot, and can be
 506           manually enabled with:
 507
 508             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 509
 510           Alternatively, if you want dynamic tick automatically enabled
 511           during boot, pass "dyntick=enable" via the kernel command string.
 512
 513           Please note that dynamic tick may affect the accuracy of
 514           timekeeping on some platforms depending on the implementation.
 515           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 516           to have accurate timekeeping with dynamic tick.
 517
 518 config HZ
 519         int
 520         default 128 if ARCH_L7200
 521         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 522         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 523         default 100
 524
 525 config AEABI
 526         bool "Use the ARM EABI to compile the kernel"
 527         help
 528           This option allows for the kernel to be compiled using the latest
 529           ARM ABI (aka EABI).  This is only useful if you are using a user
 530           space environment that is also compiled with EABI.
 531
 532           Since there are major incompatibilities between the legacy ABI and
 533           EABI, especially with regard to structure member alignment, this
 534           option also changes the kernel syscall calling convention to
 535           disambiguate both ABIs and allow for backward compatibility support
 536           (selected with CONFIG_OABI_COMPAT).
 537
 538           To use this you need GCC version 4.0.0 or later.
 539
 540 config OABI_COMPAT
 541         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 542         depends on AEABI && EXPERIMENTAL
 543         default y
 544         help
 545           This option preserves the old syscall interface along with the
 546           new (ARM EABI) one. It also provides a compatibility layer to
 547           intercept syscalls that have structure arguments which layout
 548           in memory differs between the legacy ABI and the new ARM EABI
 549           (only for non "thumb" binaries). This option adds a tiny
 550           overhead to all syscalls and produces a slightly larger kernel.
 551           If you know you'll be using only pure EABI user space then you
 552           can say N here. If this option is not selected and you attempt
 553           to execute a legacy ABI binary then the result will be
 554           UNPREDICTABLE (in fact it can be predicted that it won't work
 555           at all). If in doubt say Y.
 556
 557 config ARCH_DISCONTIGMEM_ENABLE
 558         bool
 559         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 560         help
 561           Say Y to support efficient handling of discontiguous physical memory,
 562           for architectures which are either NUMA (Non-Uniform Memory Access)
 563           or have huge holes in the physical address space for other reasons.
 564           See <file:Documentation/vm/numa> for more.
 565
 566 config NODES_SHIFT
 567         int
 568         default "4" if ARCH_LH7A40X
 569         default "2"
 570         depends on NEED_MULTIPLE_NODES
 571
 572 source "mm/Kconfig"
 573
 574 config LEDS
 575         bool "Timer and CPU usage LEDs"
 576         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 577                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 578                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 579                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 580                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 581                    ARCH_AT91RM9200 || MACH_TRIZEPS4
 582         help
 583           If you say Y here, the LEDs on your machine will be used
 584           to provide useful information about your current system status.
 585
 586           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 587           be able to select which LEDs are active using the options below. If
 588           you are compiling a kernel for the EBSA-110 or the LART however, the
 589           red LED will simply flash regularly to indicate that the system is
 590           still functional. It is safe to say Y here if you have a CATS
 591           system, but the driver will do nothing.
 592
 593 config LEDS_TIMER
 594         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 595                             MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 596         depends on LEDS
 597         default y if ARCH_EBSA110
 598         help
 599           If you say Y here, one of the system LEDs (the green one on the
 600           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 601           will flash regularly to indicate that the system is still
 602           operational. This is mainly useful to kernel hackers who are
 603           debugging unstable kernels.
 604
 605           The LART uses the same LED for both Timer LED and CPU usage LED
 606           functions. You may choose to use both, but the Timer LED function
 607           will overrule the CPU usage LED.
 608
 609 config LEDS_CPU
 610         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 611                         !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 612         depends on LEDS
 613         help
 614           If you say Y here, the red LED will be used to give a good real
 615           time indication of CPU usage, by lighting whenever the idle task
 616           is not currently executing.
 617
 618           The LART uses the same LED for both Timer LED and CPU usage LED
 619           functions. You may choose to use both, but the Timer LED function
 620           will overrule the CPU usage LED.
 621
 622 config ALIGNMENT_TRAP
 623         bool
 624         depends on CPU_CP15_MMU
 625         default y if !ARCH_EBSA110
 626         help
 627           ARM processors can not fetch/store information which is not
 628           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 629           address divisible by 4. On 32-bit ARM processors, these non-aligned
 630           fetch/store instructions will be emulated in software if you say
 631           here, which has a severe performance impact. This is necessary for
 632           correct operation of some network protocols. With an IP-only
 633           configuration it is safe to say N, otherwise say Y.
 634
 635 endmenu
 636
 637 menu "Boot options"
 638
 639 # Compressed boot loader in ROM.  Yes, we really want to ask about
 640 # TEXT and BSS so we preserve their values in the config files.
 641 config ZBOOT_ROM_TEXT
 642         hex "Compressed ROM boot loader base address"
 643         default "0"
 644         help
 645           The physical address at which the ROM-able zImage is to be
 646           placed in the target.  Platforms which normally make use of
 647           ROM-able zImage formats normally set this to a suitable
 648           value in their defconfig file.
 649
 650           If ZBOOT_ROM is not enabled, this has no effect.
 651
 652 config ZBOOT_ROM_BSS
 653         hex "Compressed ROM boot loader BSS address"
 654         default "0"
 655         help
 656           The base address of an area of read/write memory in the target
 657           for the ROM-able zImage which must be available while the
 658           decompressor is running. It must be large enough to hold the
 659           entire decompressed kernel plus an additional 128 KiB.
 660           Platforms which normally make use of ROM-able zImage formats
 661           normally set this to a suitable value in their defconfig file.
 662
 663           If ZBOOT_ROM is not enabled, this has no effect.
 664
 665 config ZBOOT_ROM
 666         bool "Compressed boot loader in ROM/flash"
 667         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 668         help
 669           Say Y here if you intend to execute your compressed kernel image
 670           (zImage) directly from ROM or flash.  If unsure, say N.
 671
 672 config CMDLINE
 673         string "Default kernel command string"
 674         default ""
 675         help
 676           On some architectures (EBSA110 and CATS), there is currently no way
 677           for the boot loader to pass arguments to the kernel. For these
 678           architectures, you should supply some command-line options at build
 679           time by entering them here. As a minimum, you should specify the
 680           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 681
 682 config XIP_KERNEL
 683         bool "Kernel Execute-In-Place from ROM"
 684         depends on !ZBOOT_ROM
 685         help
 686           Execute-In-Place allows the kernel to run from non-volatile storage
 687           directly addressable by the CPU, such as NOR flash. This saves RAM
 688           space since the text section of the kernel is not loaded from flash
 689           to RAM.  Read-write sections, such as the data section and stack,
 690           are still copied to RAM.  The XIP kernel is not compressed since
 691           it has to run directly from flash, so it will take more space to
 692           store it.  The flash address used to link the kernel object files,
 693           and for storing it, is configuration dependent. Therefore, if you
 694           say Y here, you must know the proper physical address where to
 695           store the kernel image depending on your own flash memory usage.
 696
 697           Also note that the make target becomes "make xipImage" rather than
 698           "make zImage" or "make Image".  The final kernel binary to put in
 699           ROM memory will be arch/arm/boot/xipImage.
 700
 701           If unsure, say N.
 702
 703 config XIP_PHYS_ADDR
 704         hex "XIP Kernel Physical Location"
 705         depends on XIP_KERNEL
 706         default "0x00080000"
 707         help
 708           This is the physical address in your flash memory the kernel will
 709           be linked for and stored to.  This address is dependent on your
 710           own flash usage.
 711
 712 endmenu
 713
 714 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP)
 715
 716 menu "CPU Frequency scaling"
 717
 718 source "drivers/cpufreq/Kconfig"
 719
 720 config CPU_FREQ_SA1100
 721         bool
 722         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 723         default y
 724
 725 config CPU_FREQ_SA1110
 726         bool
 727         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 728         default y
 729
 730 config CPU_FREQ_INTEGRATOR
 731         tristate "CPUfreq driver for ARM Integrator CPUs"
 732         depends on ARCH_INTEGRATOR && CPU_FREQ
 733         default y
 734         help
 735           This enables the CPUfreq driver for ARM Integrator CPUs.
 736
 737           For details, take a look at <file:Documentation/cpu-freq>.
 738
 739           If in doubt, say Y.
 740
 741 endmenu
 742
 743 endif
 744
 745 menu "Floating point emulation"
 746
 747 comment "At least one emulation must be selected"
 748
 749 config FPE_NWFPE
 750         bool "NWFPE math emulation"
 751         depends on !AEABI || OABI_COMPAT
 752         ---help---
 753           Say Y to include the NWFPE floating point emulator in the kernel.
 754           This is necessary to run most binaries. Linux does not currently
 755           support floating point hardware so you need to say Y here even if
 756           your machine has an FPA or floating point co-processor podule.
 757
 758           You may say N here if you are going to load the Acorn FPEmulator
 759           early in the bootup.
 760
 761 config FPE_NWFPE_XP
 762         bool "Support extended precision"
 763         depends on FPE_NWFPE
 764         help
 765           Say Y to include 80-bit support in the kernel floating-point
 766           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 767           Note that gcc does not generate 80-bit operations by default,
 768           so in most cases this option only enlarges the size of the
 769           floating point emulator without any good reason.
 770
 771           You almost surely want to say N here.
 772
 773 config FPE_FASTFPE
 774         bool "FastFPE math emulation (EXPERIMENTAL)"
 775         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 776         ---help---
 777           Say Y here to include the FAST floating point emulator in the kernel.
 778           This is an experimental much faster emulator which now also has full
 779           precision for the mantissa.  It does not support any exceptions.
 780           It is very simple, and approximately 3-6 times faster than NWFPE.
 781
 782           It should be sufficient for most programs.  It may be not suitable
 783           for scientific calculations, but you have to check this for yourself.
 784           If you do not feel you need a faster FP emulation you should better
 785           choose NWFPE.
 786
 787 config VFP
 788         bool "VFP-format floating point maths"
 789         depends on CPU_V6 || CPU_ARM926T
 790         help
 791           Say Y to include VFP support code in the kernel. This is needed
 792           if your hardware includes a VFP unit.
 793
 794           Please see <file:Documentation/arm/VFP/release-notes.txt> for
 795           release notes and additional status information.
 796
 797           Say N if your target does not have VFP hardware.
 798
 799 endmenu
 800
 801 menu "Userspace binary formats"
 802
 803 source "fs/Kconfig.binfmt"
 804
 805 config ARTHUR
 806         tristate "RISC OS personality"
 807         depends on !AEABI
 808         help
 809           Say Y here to include the kernel code necessary if you want to run
 810           Acorn RISC OS/Arthur binaries under Linux. This code is still very
 811           experimental; if this sounds frightening, say N and sleep in peace.
 812           You can also say M here to compile this support as a module (which
 813           will be called arthur).
 814
 815 endmenu
 816
 817 menu "Power management options"
 818
 819 source "kernel/power/Kconfig"
 820
 821 config APM
 822         tristate "Advanced Power Management Emulation"
 823         ---help---
 824           APM is a BIOS specification for saving power using several different
 825           techniques. This is mostly useful for battery powered laptops with
 826           APM compliant BIOSes. If you say Y here, the system time will be
 827           reset after a RESUME operation, the /proc/apm device will provide
 828           battery status information, and user-space programs will receive
 829           notification of APM "events" (e.g. battery status change).
 830
 831           In order to use APM, you will need supporting software. For location
 832           and more information, read <file:Documentation/pm.txt> and the
 833           Battery Powered Linux mini-HOWTO, available from
 834           <http://www.tldp.org/docs.html#howto>.
 835
 836           This driver does not spin down disk drives (see the hdparm(8)
 837           manpage ("man 8 hdparm") for that), and it doesn't turn off
 838           VESA-compliant "green" monitors.
 839
 840           Generally, if you don't have a battery in your machine, there isn't
 841           much point in using this driver and you should say N. If you get
 842           random kernel OOPSes or reboots that don't seem to be related to
 843           anything, try disabling/enabling this option (or disabling/enabling
 844           APM in your BIOS).
 845
 846 endmenu
 847
 848 source "net/Kconfig"
 849
 850 menu "Device Drivers"
 851
 852 source "drivers/base/Kconfig"
 853
 854 source "drivers/connector/Kconfig"
 855
 856 if ALIGNMENT_TRAP || !CPU_CP15_MMU
 857 source "drivers/mtd/Kconfig"
 858 endif
 859
 860 source "drivers/parport/Kconfig"
 861
 862 source "drivers/pnp/Kconfig"
 863
 864 source "drivers/block/Kconfig"
 865
 866 source "drivers/acorn/block/Kconfig"
 867
 868 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
 869         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
 870         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
 871         || ARCH_IXP23XX
 872 source "drivers/ide/Kconfig"
 873 endif
 874
 875 source "drivers/scsi/Kconfig"
 876
 877 source "drivers/md/Kconfig"
 878
 879 source "drivers/message/fusion/Kconfig"
 880
 881 source "drivers/ieee1394/Kconfig"
 882
 883 source "drivers/message/i2o/Kconfig"
 884
 885 source "drivers/net/Kconfig"
 886
 887 source "drivers/isdn/Kconfig"
 888
 889 # input before char - char/joystick depends on it. As does USB.
 890
 891 source "drivers/input/Kconfig"
 892
 893 source "drivers/char/Kconfig"
 894
 895 source "drivers/i2c/Kconfig"
 896
 897 source "drivers/spi/Kconfig"
 898
 899 source "drivers/w1/Kconfig"
 900
 901 source "drivers/hwmon/Kconfig"
 902
 903 #source "drivers/l3/Kconfig"
 904
 905 source "drivers/misc/Kconfig"
 906
 907 source "drivers/mfd/Kconfig"
 908
 909 source "drivers/leds/Kconfig"
 910
 911 source "drivers/media/Kconfig"
 912
 913 source "drivers/video/Kconfig"
 914
 915 source "sound/Kconfig"
 916
 917 source "drivers/usb/Kconfig"
 918
 919 source "drivers/mmc/Kconfig"
 920
 921 source "drivers/rtc/Kconfig"
 922
 923 endmenu
 924
 925 source "fs/Kconfig"
 926
 927 source "arch/arm/oprofile/Kconfig"
 928
 929 source "arch/arm/Kconfig.debug"
 930
 931 source "security/Kconfig"
 932
 933 source "crypto/Kconfig"
 934
 935 source "lib/Kconfig"