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 GENERIC_TIME
  21         bool
  22         default n
  23
  24 config MMU
  25         bool
  26         default y
  27
  28 config EISA
  29         bool
  30         ---help---
  31           The Extended Industry Standard Architecture (EISA) bus was
  32           developed as an open alternative to the IBM MicroChannel bus.
  33
  34           The EISA bus provided some of the features of the IBM MicroChannel
  35           bus while maintaining backward compatibility with cards made for
  36           the older ISA bus.  The EISA bus saw limited use between 1988 and
  37           1995 when it was made obsolete by the PCI bus.
  38
  39           Say Y here if you are building a kernel for an EISA-based machine.
  40
  41           Otherwise, say N.
  42
  43 config SBUS
  44         bool
  45
  46 config MCA
  47         bool
  48         help
  49           MicroChannel Architecture is found in some IBM PS/2 machines and
  50           laptops.  It is a bus system similar to PCI or ISA. See
  51           <file:Documentation/mca.txt> (and especially the web page given
  52           there) before attempting to build an MCA bus kernel.
  53
  54 config GENERIC_HARDIRQS
  55         bool
  56         default y
  57
  58 config TRACE_IRQFLAGS_SUPPORT
  59         bool
  60         default y
  61
  62 config HARDIRQS_SW_RESEND
  63         bool
  64         default y
  65
  66 config GENERIC_IRQ_PROBE
  67         bool
  68         default y
  69
  70 config RWSEM_GENERIC_SPINLOCK
  71         bool
  72         default y
  73
  74 config RWSEM_XCHGADD_ALGORITHM
  75         bool
  76
  77 config GENERIC_HWEIGHT
  78         bool
  79         default y
  80
  81 config GENERIC_CALIBRATE_DELAY
  82         bool
  83         default y
  84
  85 config GENERIC_BUST_SPINLOCK
  86         bool
  87
  88 config ARCH_MAY_HAVE_PC_FDC
  89         bool
  90
  91 config GENERIC_ISA_DMA
  92         bool
  93
  94 config FIQ
  95         bool
  96
  97 config ARCH_MTD_XIP
  98         bool
  99
 100 config VECTORS_BASE
 101         hex
 102         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 103         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 104         default 0x00000000
 105         help
 106           The base address of exception vectors.
 107
 108 source "init/Kconfig"
 109
 110 menu "System Type"
 111
 112 choice
 113         prompt "ARM system type"
 114         default ARCH_VERSATILE
 115
 116 config ARCH_AAEC2000
 117         bool "Agilent AAEC-2000 based"
 118         select ARM_AMBA
 119         help
 120           This enables support for systems based on the Agilent AAEC-2000
 121
 122 config ARCH_INTEGRATOR
 123         bool "ARM Ltd. Integrator family"
 124         select ARM_AMBA
 125         select ICST525
 126         help
 127           Support for ARM's Integrator platform.
 128
 129 config ARCH_REALVIEW
 130         bool "ARM Ltd. RealView family"
 131         select ARM_AMBA
 132         select ICST307
 133         help
 134           This enables support for ARM Ltd RealView boards.
 135
 136 config ARCH_VERSATILE
 137         bool "ARM Ltd. Versatile family"
 138         select ARM_AMBA
 139         select ARM_VIC
 140         select ICST307
 141         help
 142           This enables support for ARM Ltd Versatile board.
 143
 144 config ARCH_AT91
 145         bool "Atmel AT91"
 146         help
 147           This enables support for systems based on the Atmel AT91RM9200
 148           and AT91SAM9xxx processors.
 149
 150 config ARCH_CLPS7500
 151         bool "Cirrus CL-PS7500FE"
 152         select TIMER_ACORN
 153         select ISA
 154         help
 155           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 156
 157 config ARCH_CLPS711X
 158         bool "Cirrus Logic CLPS711x/EP721x-based"
 159         help
 160           Support for Cirrus Logic 711x/721x based boards.
 161
 162 config ARCH_CO285
 163         bool "Co-EBSA285"
 164         select FOOTBRIDGE
 165         select FOOTBRIDGE_ADDIN
 166         help
 167           Support for Intel's EBSA285 companion chip.
 168
 169 config ARCH_EBSA110
 170         bool "EBSA-110"
 171         select ISA
 172         help
 173           This is an evaluation board for the StrongARM processor available
 174           from Digital. It has limited hardware on-board, including an
 175           Ethernet interface, two PCMCIA sockets, two serial ports and a
 176           parallel port.
 177
 178 config ARCH_EP93XX
 179         bool "EP93xx-based"
 180         select ARM_AMBA
 181         select ARM_VIC
 182         help
 183           This enables support for the Cirrus EP93xx series of CPUs.
 184
 185 config ARCH_FOOTBRIDGE
 186         bool "FootBridge"
 187         select FOOTBRIDGE
 188         help
 189           Support for systems based on the DC21285 companion chip
 190           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 191
 192 config ARCH_NETX
 193         bool "Hilscher NetX based"
 194         select ARM_VIC
 195         help
 196           This enables support for systems based on the Hilscher NetX Soc
 197
 198 config ARCH_H720X
 199         bool "Hynix HMS720x-based"
 200         select ISA_DMA_API
 201         help
 202           This enables support for systems based on the Hynix HMS720x
 203
 204 config ARCH_IMX
 205         bool "IMX"
 206         help
 207           Support for Motorola's i.MX family of processors (MX1, MXL).
 208
 209 config ARCH_IOP32X
 210         bool "IOP32x-based"
 211         depends on MMU
 212         select PLAT_IOP
 213         select PCI
 214         help
 215           Support for Intel's 80219 and IOP32X (XScale) family of
 216           processors.
 217
 218 config ARCH_IOP33X
 219         bool "IOP33x-based"
 220         depends on MMU
 221         select PLAT_IOP
 222         select PCI
 223         help
 224           Support for Intel's IOP33X (XScale) family of processors.
 225
 226 config ARCH_IOP13XX
 227         bool "IOP13xx-based"
 228         select PCI
 229         help
 230           Support for Intel's IOP13XX (XScale) family of processors.
 231
 232 config ARCH_IXP4XX
 233         bool "IXP4xx-based"
 234         depends on MMU
 235         select GENERIC_TIME
 236         help
 237           Support for Intel's IXP4XX (XScale) family of processors.
 238
 239 config ARCH_IXP2000
 240         bool "IXP2400/2800-based"
 241         depends on MMU
 242         select PCI
 243         help
 244           Support for Intel's IXP2400/2800 (XScale) family of processors.
 245
 246 config ARCH_IXP23XX
 247         bool "IXP23XX-based"
 248         depends on MMU
 249         select PCI
 250         help
 251           Support for Intel's IXP23xx (XScale) family of processors.
 252
 253 config ARCH_L7200
 254         bool "LinkUp-L7200"
 255         select FIQ
 256         help
 257           Say Y here if you intend to run this kernel on a LinkUp Systems
 258           L7200 Software Development Board which uses an ARM720T processor.
 259           Information on this board can be obtained at:
 260
 261           <http://www.linkupsys.com/>
 262
 263           If you have any questions or comments about the Linux kernel port
 264           to this board, send e-mail to <sjhill@cotw.com>.
 265
 266 config ARCH_PNX4008
 267         bool "Philips Nexperia PNX4008 Mobile"
 268         help
 269           This enables support for Philips PNX4008 mobile platform.
 270
 271 config ARCH_PXA
 272         bool "PXA2xx-based"
 273         depends on MMU
 274         select ARCH_MTD_XIP
 275         help
 276           Support for Intel's PXA2XX processor line.
 277
 278 config ARCH_RPC
 279         bool "RiscPC"
 280         select ARCH_ACORN
 281         select FIQ
 282         select TIMER_ACORN
 283         select ARCH_MAY_HAVE_PC_FDC
 284         select ISA_DMA_API
 285         help
 286           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 287           CD-ROM interface, serial and parallel port, and the floppy drive.
 288
 289 config ARCH_SA1100
 290         bool "SA1100-based"
 291         select ISA
 292         select ARCH_DISCONTIGMEM_ENABLE
 293         select ARCH_MTD_XIP
 294         help
 295           Support for StrongARM 11x0 based boards.
 296
 297 config ARCH_S3C2410
 298         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
 299         help
 300           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 301           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 302           the Samsung SMDK2410 development board (and derivatives).
 303
 304 config ARCH_SHARK
 305         bool "Shark"
 306         select ISA
 307         select ISA_DMA
 308         select PCI
 309         help
 310           Support for the StrongARM based Digital DNARD machine, also known
 311           as "Shark" (<http://www.shark-linux.de/shark.html>).
 312
 313 config ARCH_LH7A40X
 314         bool "Sharp LH7A40X"
 315         help
 316           Say Y here for systems based on one of the Sharp LH7A40X
 317           System on a Chip processors.  These CPUs include an ARM922T
 318           core with a wide array of integrated devices for
 319           hand-held and low-power applications.
 320
 321 config ARCH_OMAP
 322         bool "TI OMAP"
 323         help
 324           Support for TI's OMAP platform (OMAP1 and OMAP2).
 325
 326 endchoice
 327
 328 source "arch/arm/mach-clps711x/Kconfig"
 329
 330 source "arch/arm/mach-ep93xx/Kconfig"
 331
 332 source "arch/arm/mach-footbridge/Kconfig"
 333
 334 source "arch/arm/mach-integrator/Kconfig"
 335
 336 source "arch/arm/mach-iop32x/Kconfig"
 337
 338 source "arch/arm/mach-iop33x/Kconfig"
 339
 340 source "arch/arm/mach-iop13xx/Kconfig"
 341
 342 source "arch/arm/mach-ixp4xx/Kconfig"
 343
 344 source "arch/arm/mach-ixp2000/Kconfig"
 345
 346 source "arch/arm/mach-ixp23xx/Kconfig"
 347
 348 source "arch/arm/mach-pxa/Kconfig"
 349
 350 source "arch/arm/mach-sa1100/Kconfig"
 351
 352 source "arch/arm/plat-omap/Kconfig"
 353
 354 source "arch/arm/mach-omap1/Kconfig"
 355
 356 source "arch/arm/mach-omap2/Kconfig"
 357
 358 source "arch/arm/mach-s3c2410/Kconfig"
 359
 360 source "arch/arm/mach-lh7a40x/Kconfig"
 361
 362 source "arch/arm/mach-imx/Kconfig"
 363
 364 source "arch/arm/mach-h720x/Kconfig"
 365
 366 source "arch/arm/mach-versatile/Kconfig"
 367
 368 source "arch/arm/mach-aaec2000/Kconfig"
 369
 370 source "arch/arm/mach-realview/Kconfig"
 371
 372 source "arch/arm/mach-at91rm9200/Kconfig"
 373
 374 source "arch/arm/mach-netx/Kconfig"
 375
 376 # Definitions to make life easier
 377 config ARCH_ACORN
 378         bool
 379
 380 config PLAT_IOP
 381         bool
 382
 383 source arch/arm/mm/Kconfig
 384
 385 config IWMMXT
 386         bool "Enable iWMMXt support"
 387         depends CPU_XSCALE || CPU_XSC3
 388         default y if PXA27x
 389         help
 390           Enable support for iWMMXt context switching at run time if
 391           running on a CPU that supports it.
 392
 393 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 394 config XSCALE_PMU
 395         bool
 396         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 397         default y
 398
 399 if !MMU
 400 source "arch/arm/Kconfig-nommu"
 401 endif
 402
 403 endmenu
 404
 405 source "arch/arm/common/Kconfig"
 406
 407 config FORCE_MAX_ZONEORDER
 408         int
 409         depends on SA1111
 410         default "9"
 411
 412 menu "Bus support"
 413
 414 config ARM_AMBA
 415         bool
 416
 417 config ISA
 418         bool
 419         help
 420           Find out whether you have ISA slots on your motherboard.  ISA is the
 421           name of a bus system, i.e. the way the CPU talks to the other stuff
 422           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 423           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 424           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 425
 426 # Select ISA DMA controller support
 427 config ISA_DMA
 428         bool
 429         select ISA_DMA_API
 430
 431 # Select ISA DMA interface
 432 config ISA_DMA_API
 433         bool
 434
 435 config PCI
 436         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
 437         help
 438           Find out whether you have a PCI motherboard. PCI is the name of a
 439           bus system, i.e. the way the CPU talks to the other stuff inside
 440           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 441           VESA. If you have PCI, say Y, otherwise N.
 442
 443           The PCI-HOWTO, available from
 444           <http://www.tldp.org/docs.html#howto>, contains valuable
 445           information about which PCI hardware does work under Linux and which
 446           doesn't.
 447
 448 # Select the host bridge type
 449 config PCI_HOST_VIA82C505
 450         bool
 451         depends on PCI && ARCH_SHARK
 452         default y
 453
 454 source "drivers/pci/Kconfig"
 455
 456 source "drivers/pcmcia/Kconfig"
 457
 458 endmenu
 459
 460 menu "Kernel Features"
 461
 462 config SMP
 463         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 464         depends on EXPERIMENTAL && REALVIEW_MPCORE
 465         help
 466           This enables support for systems with more than one CPU. If you have
 467           a system with only one CPU, like most personal computers, say N. If
 468           you have a system with more than one CPU, say Y.
 469
 470           If you say N here, the kernel will run on single and multiprocessor
 471           machines, but will use only one CPU of a multiprocessor machine. If
 472           you say Y here, the kernel will run on many, but not all, single
 473           processor machines. On a single processor machine, the kernel will
 474           run faster if you say N here.
 475
 476           See also the <file:Documentation/smp.txt>,
 477           <file:Documentation/i386/IO-APIC.txt>,
 478           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 479           <http://www.linuxdoc.org/docs.html#howto>.
 480
 481           If you don't know what to do here, say N.
 482
 483 config NR_CPUS
 484         int "Maximum number of CPUs (2-32)"
 485         range 2 32
 486         depends on SMP
 487         default "4"
 488
 489 config HOTPLUG_CPU
 490         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 491         depends on SMP && HOTPLUG && EXPERIMENTAL
 492         help
 493           Say Y here to experiment with turning CPUs off and on.  CPUs
 494           can be controlled through /sys/devices/system/cpu.
 495
 496 config LOCAL_TIMERS
 497         bool "Use local timer interrupts"
 498         depends on SMP && REALVIEW_MPCORE
 499         default y
 500         help
 501           Enable support for local timers on SMP platforms, rather then the
 502           legacy IPI broadcast method.  Local timers allows the system
 503           accounting to be spread across the timer interval, preventing a
 504           "thundering herd" at every timer tick.
 505
 506 config PREEMPT
 507         bool "Preemptible Kernel (EXPERIMENTAL)"
 508         depends on EXPERIMENTAL
 509         help
 510           This option reduces the latency of the kernel when reacting to
 511           real-time or interactive events by allowing a low priority process to
 512           be preempted even if it is in kernel mode executing a system call.
 513           This allows applications to run more reliably even when the system is
 514           under load.
 515
 516           Say Y here if you are building a kernel for a desktop, embedded
 517           or real-time system.  Say N if you are unsure.
 518
 519 config NO_IDLE_HZ
 520         bool "Dynamic tick timer"
 521         help
 522           Select this option if you want to disable continuous timer ticks
 523           and have them programmed to occur as required. This option saves
 524           power as the system can remain in idle state for longer.
 525
 526           By default dynamic tick is disabled during the boot, and can be
 527           manually enabled with:
 528
 529             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 530
 531           Alternatively, if you want dynamic tick automatically enabled
 532           during boot, pass "dyntick=enable" via the kernel command string.
 533
 534           Please note that dynamic tick may affect the accuracy of
 535           timekeeping on some platforms depending on the implementation.
 536           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 537           to have accurate timekeeping with dynamic tick.
 538
 539 config HZ
 540         int
 541         default 128 if ARCH_L7200
 542         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 543         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 544         default 100
 545
 546 config AEABI
 547         bool "Use the ARM EABI to compile the kernel"
 548         help
 549           This option allows for the kernel to be compiled using the latest
 550           ARM ABI (aka EABI).  This is only useful if you are using a user
 551           space environment that is also compiled with EABI.
 552
 553           Since there are major incompatibilities between the legacy ABI and
 554           EABI, especially with regard to structure member alignment, this
 555           option also changes the kernel syscall calling convention to
 556           disambiguate both ABIs and allow for backward compatibility support
 557           (selected with CONFIG_OABI_COMPAT).
 558
 559           To use this you need GCC version 4.0.0 or later.
 560
 561 config OABI_COMPAT
 562         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 563         depends on AEABI && EXPERIMENTAL
 564         default y
 565         help
 566           This option preserves the old syscall interface along with the
 567           new (ARM EABI) one. It also provides a compatibility layer to
 568           intercept syscalls that have structure arguments which layout
 569           in memory differs between the legacy ABI and the new ARM EABI
 570           (only for non "thumb" binaries). This option adds a tiny
 571           overhead to all syscalls and produces a slightly larger kernel.
 572           If you know you'll be using only pure EABI user space then you
 573           can say N here. If this option is not selected and you attempt
 574           to execute a legacy ABI binary then the result will be
 575           UNPREDICTABLE (in fact it can be predicted that it won't work
 576           at all). If in doubt say Y.
 577
 578 config ARCH_DISCONTIGMEM_ENABLE
 579         bool
 580         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 581         help
 582           Say Y to support efficient handling of discontiguous physical memory,
 583           for architectures which are either NUMA (Non-Uniform Memory Access)
 584           or have huge holes in the physical address space for other reasons.
 585           See <file:Documentation/vm/numa> for more.
 586
 587 config NODES_SHIFT
 588         int
 589         default "4" if ARCH_LH7A40X
 590         default "2"
 591         depends on NEED_MULTIPLE_NODES
 592
 593 source "mm/Kconfig"
 594
 595 config LEDS
 596         bool "Timer and CPU usage LEDs"
 597         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 598                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 599                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 600                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 601                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 602                    ARCH_AT91 || MACH_TRIZEPS4
 603         help
 604           If you say Y here, the LEDs on your machine will be used
 605           to provide useful information about your current system status.
 606
 607           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 608           be able to select which LEDs are active using the options below. If
 609           you are compiling a kernel for the EBSA-110 or the LART however, the
 610           red LED will simply flash regularly to indicate that the system is
 611           still functional. It is safe to say Y here if you have a CATS
 612           system, but the driver will do nothing.
 613
 614 config LEDS_TIMER
 615         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 616                             MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 617         depends on LEDS
 618         default y if ARCH_EBSA110
 619         help
 620           If you say Y here, one of the system LEDs (the green one on the
 621           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 622           will flash regularly to indicate that the system is still
 623           operational. This is mainly useful to kernel hackers who are
 624           debugging unstable kernels.
 625
 626           The LART uses the same LED for both Timer LED and CPU usage LED
 627           functions. You may choose to use both, but the Timer LED function
 628           will overrule the CPU usage LED.
 629
 630 config LEDS_CPU
 631         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 632                         !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 633         depends on LEDS
 634         help
 635           If you say Y here, the red LED will be used to give a good real
 636           time indication of CPU usage, by lighting whenever the idle task
 637           is not currently executing.
 638
 639           The LART uses the same LED for both Timer LED and CPU usage LED
 640           functions. You may choose to use both, but the Timer LED function
 641           will overrule the CPU usage LED.
 642
 643 config ALIGNMENT_TRAP
 644         bool
 645         depends on CPU_CP15_MMU
 646         default y if !ARCH_EBSA110
 647         help
 648           ARM processors cannot fetch/store information which is not
 649           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 650           address divisible by 4. On 32-bit ARM processors, these non-aligned
 651           fetch/store instructions will be emulated in software if you say
 652           here, which has a severe performance impact. This is necessary for
 653           correct operation of some network protocols. With an IP-only
 654           configuration it is safe to say N, otherwise say Y.
 655
 656 endmenu
 657
 658 menu "Boot options"
 659
 660 # Compressed boot loader in ROM.  Yes, we really want to ask about
 661 # TEXT and BSS so we preserve their values in the config files.
 662 config ZBOOT_ROM_TEXT
 663         hex "Compressed ROM boot loader base address"
 664         default "0"
 665         help
 666           The physical address at which the ROM-able zImage is to be
 667           placed in the target.  Platforms which normally make use of
 668           ROM-able zImage formats normally set this to a suitable
 669           value in their defconfig file.
 670
 671           If ZBOOT_ROM is not enabled, this has no effect.
 672
 673 config ZBOOT_ROM_BSS
 674         hex "Compressed ROM boot loader BSS address"
 675         default "0"
 676         help
 677           The base address of an area of read/write memory in the target
 678           for the ROM-able zImage which must be available while the
 679           decompressor is running. It must be large enough to hold the
 680           entire decompressed kernel plus an additional 128 KiB.
 681           Platforms which normally make use of ROM-able zImage formats
 682           normally set this to a suitable value in their defconfig file.
 683
 684           If ZBOOT_ROM is not enabled, this has no effect.
 685
 686 config ZBOOT_ROM
 687         bool "Compressed boot loader in ROM/flash"
 688         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 689         help
 690           Say Y here if you intend to execute your compressed kernel image
 691           (zImage) directly from ROM or flash.  If unsure, say N.
 692
 693 config CMDLINE
 694         string "Default kernel command string"
 695         default ""
 696         help
 697           On some architectures (EBSA110 and CATS), there is currently no way
 698           for the boot loader to pass arguments to the kernel. For these
 699           architectures, you should supply some command-line options at build
 700           time by entering them here. As a minimum, you should specify the
 701           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 702
 703 config XIP_KERNEL
 704         bool "Kernel Execute-In-Place from ROM"
 705         depends on !ZBOOT_ROM
 706         help
 707           Execute-In-Place allows the kernel to run from non-volatile storage
 708           directly addressable by the CPU, such as NOR flash. This saves RAM
 709           space since the text section of the kernel is not loaded from flash
 710           to RAM.  Read-write sections, such as the data section and stack,
 711           are still copied to RAM.  The XIP kernel is not compressed since
 712           it has to run directly from flash, so it will take more space to
 713           store it.  The flash address used to link the kernel object files,
 714           and for storing it, is configuration dependent. Therefore, if you
 715           say Y here, you must know the proper physical address where to
 716           store the kernel image depending on your own flash memory usage.
 717
 718           Also note that the make target becomes "make xipImage" rather than
 719           "make zImage" or "make Image".  The final kernel binary to put in
 720           ROM memory will be arch/arm/boot/xipImage.
 721
 722           If unsure, say N.
 723
 724 config XIP_PHYS_ADDR
 725         hex "XIP Kernel Physical Location"
 726         depends on XIP_KERNEL
 727         default "0x00080000"
 728         help
 729           This is the physical address in your flash memory the kernel will
 730           be linked for and stored to.  This address is dependent on your
 731           own flash usage.
 732
 733 endmenu
 734
 735 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP)
 736
 737 menu "CPU Frequency scaling"
 738
 739 source "drivers/cpufreq/Kconfig"
 740
 741 config CPU_FREQ_SA1100
 742         bool
 743         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 744         default y
 745
 746 config CPU_FREQ_SA1110
 747         bool
 748         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 749         default y
 750
 751 config CPU_FREQ_INTEGRATOR
 752         tristate "CPUfreq driver for ARM Integrator CPUs"
 753         depends on ARCH_INTEGRATOR && CPU_FREQ
 754         default y
 755         help
 756           This enables the CPUfreq driver for ARM Integrator CPUs.
 757
 758           For details, take a look at <file:Documentation/cpu-freq>.
 759
 760           If in doubt, say Y.
 761
 762 endmenu
 763
 764 endif
 765
 766 menu "Floating point emulation"
 767
 768 comment "At least one emulation must be selected"
 769
 770 config FPE_NWFPE
 771         bool "NWFPE math emulation"
 772         depends on !AEABI || OABI_COMPAT
 773         ---help---
 774           Say Y to include the NWFPE floating point emulator in the kernel.
 775           This is necessary to run most binaries. Linux does not currently
 776           support floating point hardware so you need to say Y here even if
 777           your machine has an FPA or floating point co-processor podule.
 778
 779           You may say N here if you are going to load the Acorn FPEmulator
 780           early in the bootup.
 781
 782 config FPE_NWFPE_XP
 783         bool "Support extended precision"
 784         depends on FPE_NWFPE
 785         help
 786           Say Y to include 80-bit support in the kernel floating-point
 787           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 788           Note that gcc does not generate 80-bit operations by default,
 789           so in most cases this option only enlarges the size of the
 790           floating point emulator without any good reason.
 791
 792           You almost surely want to say N here.
 793
 794 config FPE_FASTFPE
 795         bool "FastFPE math emulation (EXPERIMENTAL)"
 796         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 797         ---help---
 798           Say Y here to include the FAST floating point emulator in the kernel.
 799           This is an experimental much faster emulator which now also has full
 800           precision for the mantissa.  It does not support any exceptions.
 801           It is very simple, and approximately 3-6 times faster than NWFPE.
 802
 803           It should be sufficient for most programs.  It may be not suitable
 804           for scientific calculations, but you have to check this for yourself.
 805           If you do not feel you need a faster FP emulation you should better
 806           choose NWFPE.
 807
 808 config VFP
 809         bool "VFP-format floating point maths"
 810         depends on CPU_V6 || CPU_ARM926T
 811         help
 812           Say Y to include VFP support code in the kernel. This is needed
 813           if your hardware includes a VFP unit.
 814
 815           Please see <file:Documentation/arm/VFP/release-notes.txt> for
 816           release notes and additional status information.
 817
 818           Say N if your target does not have VFP hardware.
 819
 820 endmenu
 821
 822 menu "Userspace binary formats"
 823
 824 source "fs/Kconfig.binfmt"
 825
 826 config ARTHUR
 827         tristate "RISC OS personality"
 828         depends on !AEABI
 829         help
 830           Say Y here to include the kernel code necessary if you want to run
 831           Acorn RISC OS/Arthur binaries under Linux. This code is still very
 832           experimental; if this sounds frightening, say N and sleep in peace.
 833           You can also say M here to compile this support as a module (which
 834           will be called arthur).
 835
 836 endmenu
 837
 838 menu "Power management options"
 839
 840 source "kernel/power/Kconfig"
 841
 842 config APM
 843         tristate "Advanced Power Management Emulation"
 844         ---help---
 845           APM is a BIOS specification for saving power using several different
 846           techniques. This is mostly useful for battery powered laptops with
 847           APM compliant BIOSes. If you say Y here, the system time will be
 848           reset after a RESUME operation, the /proc/apm device will provide
 849           battery status information, and user-space programs will receive
 850           notification of APM "events" (e.g. battery status change).
 851
 852           In order to use APM, you will need supporting software. For location
 853           and more information, read <file:Documentation/pm.txt> and the
 854           Battery Powered Linux mini-HOWTO, available from
 855           <http://www.tldp.org/docs.html#howto>.
 856
 857           This driver does not spin down disk drives (see the hdparm(8)
 858           manpage ("man 8 hdparm") for that), and it doesn't turn off
 859           VESA-compliant "green" monitors.
 860
 861           Generally, if you don't have a battery in your machine, there isn't
 862           much point in using this driver and you should say N. If you get
 863           random kernel OOPSes or reboots that don't seem to be related to
 864           anything, try disabling/enabling this option (or disabling/enabling
 865           APM in your BIOS).
 866
 867 endmenu
 868
 869 source "net/Kconfig"
 870
 871 menu "Device Drivers"
 872
 873 source "drivers/base/Kconfig"
 874
 875 source "drivers/connector/Kconfig"
 876
 877 if ALIGNMENT_TRAP || !CPU_CP15_MMU
 878 source "drivers/mtd/Kconfig"
 879 endif
 880
 881 source "drivers/parport/Kconfig"
 882
 883 source "drivers/pnp/Kconfig"
 884
 885 source "drivers/block/Kconfig"
 886
 887 source "drivers/acorn/block/Kconfig"
 888
 889 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
 890         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
 891         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
 892         || ARCH_IXP23XX
 893 source "drivers/ide/Kconfig"
 894 endif
 895
 896 source "drivers/scsi/Kconfig"
 897
 898 source "drivers/ata/Kconfig"
 899
 900 source "drivers/md/Kconfig"
 901
 902 source "drivers/message/fusion/Kconfig"
 903
 904 source "drivers/ieee1394/Kconfig"
 905
 906 source "drivers/message/i2o/Kconfig"
 907
 908 source "drivers/net/Kconfig"
 909
 910 source "drivers/isdn/Kconfig"
 911
 912 # input before char - char/joystick depends on it. As does USB.
 913
 914 source "drivers/input/Kconfig"
 915
 916 source "drivers/char/Kconfig"
 917
 918 source "drivers/i2c/Kconfig"
 919
 920 source "drivers/spi/Kconfig"
 921
 922 source "drivers/w1/Kconfig"
 923
 924 source "drivers/hwmon/Kconfig"
 925
 926 #source "drivers/l3/Kconfig"
 927
 928 source "drivers/misc/Kconfig"
 929
 930 source "drivers/mfd/Kconfig"
 931
 932 source "drivers/leds/Kconfig"
 933
 934 source "drivers/media/Kconfig"
 935
 936 source "drivers/video/Kconfig"
 937
 938 source "sound/Kconfig"
 939
 940 source "drivers/usb/Kconfig"
 941
 942 source "drivers/mmc/Kconfig"
 943
 944 source "drivers/rtc/Kconfig"
 945
 946 endmenu
 947
 948 source "fs/Kconfig"
 949
 950 source "arch/arm/oprofile/Kconfig"
 951
 952 source "arch/arm/Kconfig.debug"
 953
 954 source "security/Kconfig"
 955
 956 source "crypto/Kconfig"
 957
 958 source "lib/Kconfig"