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         select SYS_SUPPORTS_APM_EMULATION
  13         help
  14           The ARM series is a line of low-power-consumption RISC chip designs
  15           licensed by ARM Ltd and targeted at embedded applications and
  16           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  17           manufactured, but legacy ARM-based PC hardware remains popular in
  18           Europe.  There is an ARM Linux project with a web page at
  19           <http://www.arm.linux.org.uk/>.
  20
  21 config SYS_SUPPORTS_APM_EMULATION
  22         bool
  23
  24 config GENERIC_TIME
  25         bool
  26         default n
  27
  28 config MMU
  29         bool
  30         default y
  31
  32 config NO_IOPORT
  33         bool
  34         default n
  35
  36 config EISA
  37         bool
  38         ---help---
  39           The Extended Industry Standard Architecture (EISA) bus was
  40           developed as an open alternative to the IBM MicroChannel bus.
  41
  42           The EISA bus provided some of the features of the IBM MicroChannel
  43           bus while maintaining backward compatibility with cards made for
  44           the older ISA bus.  The EISA bus saw limited use between 1988 and
  45           1995 when it was made obsolete by the PCI bus.
  46
  47           Say Y here if you are building a kernel for an EISA-based machine.
  48
  49           Otherwise, say N.
  50
  51 config SBUS
  52         bool
  53
  54 config MCA
  55         bool
  56         help
  57           MicroChannel Architecture is found in some IBM PS/2 machines and
  58           laptops.  It is a bus system similar to PCI or ISA. See
  59           <file:Documentation/mca.txt> (and especially the web page given
  60           there) before attempting to build an MCA bus kernel.
  61
  62 config GENERIC_HARDIRQS
  63         bool
  64         default y
  65
  66 config TRACE_IRQFLAGS_SUPPORT
  67         bool
  68         default y
  69
  70 config HARDIRQS_SW_RESEND
  71         bool
  72         default y
  73
  74 config GENERIC_IRQ_PROBE
  75         bool
  76         default y
  77
  78 config RWSEM_GENERIC_SPINLOCK
  79         bool
  80         default y
  81
  82 config RWSEM_XCHGADD_ALGORITHM
  83         bool
  84
  85 config ARCH_HAS_ILOG2_U32
  86         bool
  87         default n
  88
  89 config ARCH_HAS_ILOG2_U64
  90         bool
  91         default n
  92
  93 config GENERIC_HWEIGHT
  94         bool
  95         default y
  96
  97 config GENERIC_CALIBRATE_DELAY
  98         bool
  99         default y
 100
 101 config GENERIC_BUST_SPINLOCK
 102         bool
 103
 104 config ARCH_MAY_HAVE_PC_FDC
 105         bool
 106
 107 config ZONE_DMA
 108         bool
 109         default y
 110
 111 config GENERIC_ISA_DMA
 112         bool
 113
 114 config FIQ
 115         bool
 116
 117 config ARCH_MTD_XIP
 118         bool
 119
 120 config VECTORS_BASE
 121         hex
 122         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 123         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 124         default 0x00000000
 125         help
 126           The base address of exception vectors.
 127
 128 source "init/Kconfig"
 129
 130 menu "System Type"
 131
 132 choice
 133         prompt "ARM system type"
 134         default ARCH_VERSATILE
 135
 136 config ARCH_AAEC2000
 137         bool "Agilent AAEC-2000 based"
 138         select ARM_AMBA
 139         help
 140           This enables support for systems based on the Agilent AAEC-2000
 141
 142 config ARCH_INTEGRATOR
 143         bool "ARM Ltd. Integrator family"
 144         select ARM_AMBA
 145         select ICST525
 146         help
 147           Support for ARM's Integrator platform.
 148
 149 config ARCH_REALVIEW
 150         bool "ARM Ltd. RealView family"
 151         select ARM_AMBA
 152         select ICST307
 153         help
 154           This enables support for ARM Ltd RealView boards.
 155
 156 config ARCH_VERSATILE
 157         bool "ARM Ltd. Versatile family"
 158         select ARM_AMBA
 159         select ARM_VIC
 160         select ICST307
 161         help
 162           This enables support for ARM Ltd Versatile board.
 163
 164 config ARCH_AT91
 165         bool "Atmel AT91"
 166         help
 167           This enables support for systems based on the Atmel AT91RM9200
 168           and AT91SAM9xxx processors.
 169
 170 config ARCH_CLPS7500
 171         bool "Cirrus CL-PS7500FE"
 172         select TIMER_ACORN
 173         select ISA
 174         help
 175           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 176
 177 config ARCH_CLPS711X
 178         bool "Cirrus Logic CLPS711x/EP721x-based"
 179         help
 180           Support for Cirrus Logic 711x/721x based boards.
 181
 182 config ARCH_CO285
 183         bool "Co-EBSA285"
 184         select FOOTBRIDGE
 185         select FOOTBRIDGE_ADDIN
 186         help
 187           Support for Intel's EBSA285 companion chip.
 188
 189 config ARCH_EBSA110
 190         bool "EBSA-110"
 191         select ISA
 192         help
 193           This is an evaluation board for the StrongARM processor available
 194           from Digital. It has limited hardware on-board, including an
 195           Ethernet interface, two PCMCIA sockets, two serial ports and a
 196           parallel port.
 197
 198 config ARCH_EP93XX
 199         bool "EP93xx-based"
 200         select ARM_AMBA
 201         select ARM_VIC
 202         help
 203           This enables support for the Cirrus EP93xx series of CPUs.
 204
 205 config ARCH_FOOTBRIDGE
 206         bool "FootBridge"
 207         select FOOTBRIDGE
 208         help
 209           Support for systems based on the DC21285 companion chip
 210           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 211
 212 config ARCH_NETX
 213         bool "Hilscher NetX based"
 214         select ARM_VIC
 215         help
 216           This enables support for systems based on the Hilscher NetX Soc
 217
 218 config ARCH_H720X
 219         bool "Hynix HMS720x-based"
 220         select ISA_DMA_API
 221         help
 222           This enables support for systems based on the Hynix HMS720x
 223
 224 config ARCH_IMX
 225         bool "IMX"
 226         help
 227           Support for Motorola's i.MX family of processors (MX1, MXL).
 228
 229 config ARCH_IOP32X
 230         bool "IOP32x-based"
 231         depends on MMU
 232         select PLAT_IOP
 233         select PCI
 234         help
 235           Support for Intel's 80219 and IOP32X (XScale) family of
 236           processors.
 237
 238 config ARCH_IOP33X
 239         bool "IOP33x-based"
 240         depends on MMU
 241         select PLAT_IOP
 242         select PCI
 243         help
 244           Support for Intel's IOP33X (XScale) family of processors.
 245
 246 config ARCH_IOP13XX
 247         bool "IOP13xx-based"
 248         select PCI
 249         help
 250           Support for Intel's IOP13XX (XScale) family of processors.
 251
 252 config ARCH_IXP4XX
 253         bool "IXP4xx-based"
 254         depends on MMU
 255         select GENERIC_TIME
 256         help
 257           Support for Intel's IXP4XX (XScale) family of processors.
 258
 259 config ARCH_IXP2000
 260         bool "IXP2400/2800-based"
 261         depends on MMU
 262         select PCI
 263         help
 264           Support for Intel's IXP2400/2800 (XScale) family of processors.
 265
 266 config ARCH_IXP23XX
 267         bool "IXP23XX-based"
 268         depends on MMU
 269         select PCI
 270         help
 271           Support for Intel's IXP23xx (XScale) family of processors.
 272
 273 config ARCH_L7200
 274         bool "LinkUp-L7200"
 275         select FIQ
 276         help
 277           Say Y here if you intend to run this kernel on a LinkUp Systems
 278           L7200 Software Development Board which uses an ARM720T processor.
 279           Information on this board can be obtained at:
 280
 281           <http://www.linkupsys.com/>
 282
 283           If you have any questions or comments about the Linux kernel port
 284           to this board, send e-mail to <sjhill@cotw.com>.
 285
 286 config ARCH_PNX4008
 287         bool "Philips Nexperia PNX4008 Mobile"
 288         help
 289           This enables support for Philips PNX4008 mobile platform.
 290
 291 config ARCH_PXA
 292         bool "PXA2xx-based"
 293         depends on MMU
 294         select ARCH_MTD_XIP
 295         help
 296           Support for Intel's PXA2XX processor line.
 297
 298 config ARCH_RPC
 299         bool "RiscPC"
 300         select ARCH_ACORN
 301         select FIQ
 302         select TIMER_ACORN
 303         select ARCH_MAY_HAVE_PC_FDC
 304         select ISA_DMA_API
 305         select NO_IOPORT
 306         help
 307           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 308           CD-ROM interface, serial and parallel port, and the floppy drive.
 309
 310 config ARCH_SA1100
 311         bool "SA1100-based"
 312         select ISA
 313         select ARCH_DISCONTIGMEM_ENABLE
 314         select ARCH_MTD_XIP
 315         help
 316           Support for StrongARM 11x0 based boards.
 317
 318 config ARCH_S3C2410
 319         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
 320         help
 321           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 322           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 323           the Samsung SMDK2410 development board (and derivatives).
 324
 325 config ARCH_SHARK
 326         bool "Shark"
 327         select ISA
 328         select ISA_DMA
 329         select PCI
 330         help
 331           Support for the StrongARM based Digital DNARD machine, also known
 332           as "Shark" (<http://www.shark-linux.de/shark.html>).
 333
 334 config ARCH_LH7A40X
 335         bool "Sharp LH7A40X"
 336         help
 337           Say Y here for systems based on one of the Sharp LH7A40X
 338           System on a Chip processors.  These CPUs include an ARM922T
 339           core with a wide array of integrated devices for
 340           hand-held and low-power applications.
 341
 342 config ARCH_OMAP
 343         bool "TI OMAP"
 344         help
 345           Support for TI's OMAP platform (OMAP1 and OMAP2).
 346
 347 endchoice
 348
 349 source "arch/arm/mach-clps711x/Kconfig"
 350
 351 source "arch/arm/mach-ep93xx/Kconfig"
 352
 353 source "arch/arm/mach-footbridge/Kconfig"
 354
 355 source "arch/arm/mach-integrator/Kconfig"
 356
 357 source "arch/arm/mach-iop32x/Kconfig"
 358
 359 source "arch/arm/mach-iop33x/Kconfig"
 360
 361 source "arch/arm/mach-iop13xx/Kconfig"
 362
 363 source "arch/arm/mach-ixp4xx/Kconfig"
 364
 365 source "arch/arm/mach-ixp2000/Kconfig"
 366
 367 source "arch/arm/mach-ixp23xx/Kconfig"
 368
 369 source "arch/arm/mach-pxa/Kconfig"
 370
 371 source "arch/arm/mach-sa1100/Kconfig"
 372
 373 source "arch/arm/plat-omap/Kconfig"
 374
 375 source "arch/arm/mach-omap1/Kconfig"
 376
 377 source "arch/arm/mach-omap2/Kconfig"
 378
 379 source "arch/arm/mach-s3c2410/Kconfig"
 380
 381 source "arch/arm/mach-lh7a40x/Kconfig"
 382
 383 source "arch/arm/mach-imx/Kconfig"
 384
 385 source "arch/arm/mach-h720x/Kconfig"
 386
 387 source "arch/arm/mach-versatile/Kconfig"
 388
 389 source "arch/arm/mach-aaec2000/Kconfig"
 390
 391 source "arch/arm/mach-realview/Kconfig"
 392
 393 source "arch/arm/mach-at91rm9200/Kconfig"
 394
 395 source "arch/arm/mach-netx/Kconfig"
 396
 397 # Definitions to make life easier
 398 config ARCH_ACORN
 399         bool
 400
 401 config PLAT_IOP
 402         bool
 403
 404 source arch/arm/mm/Kconfig
 405
 406 config IWMMXT
 407         bool "Enable iWMMXt support"
 408         depends CPU_XSCALE || CPU_XSC3
 409         default y if PXA27x
 410         help
 411           Enable support for iWMMXt context switching at run time if
 412           running on a CPU that supports it.
 413
 414 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 415 config XSCALE_PMU
 416         bool
 417         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 418         default y
 419
 420 if !MMU
 421 source "arch/arm/Kconfig-nommu"
 422 endif
 423
 424 endmenu
 425
 426 source "arch/arm/common/Kconfig"
 427
 428 config FORCE_MAX_ZONEORDER
 429         int
 430         depends on SA1111
 431         default "9"
 432
 433 menu "Bus support"
 434
 435 config ARM_AMBA
 436         bool
 437
 438 config ISA
 439         bool
 440         help
 441           Find out whether you have ISA slots on your motherboard.  ISA is the
 442           name of a bus system, i.e. the way the CPU talks to the other stuff
 443           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 444           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 445           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 446
 447 # Select ISA DMA controller support
 448 config ISA_DMA
 449         bool
 450         select ISA_DMA_API
 451
 452 # Select ISA DMA interface
 453 config ISA_DMA_API
 454         bool
 455
 456 config PCI
 457         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
 458         help
 459           Find out whether you have a PCI motherboard. PCI is the name of a
 460           bus system, i.e. the way the CPU talks to the other stuff inside
 461           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 462           VESA. If you have PCI, say Y, otherwise N.
 463
 464           The PCI-HOWTO, available from
 465           <http://www.tldp.org/docs.html#howto>, contains valuable
 466           information about which PCI hardware does work under Linux and which
 467           doesn't.
 468
 469 # Select the host bridge type
 470 config PCI_HOST_VIA82C505
 471         bool
 472         depends on PCI && ARCH_SHARK
 473         default y
 474
 475 source "drivers/pci/Kconfig"
 476
 477 source "drivers/pcmcia/Kconfig"
 478
 479 endmenu
 480
 481 menu "Kernel Features"
 482
 483 config SMP
 484         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 485         depends on EXPERIMENTAL && REALVIEW_MPCORE
 486         help
 487           This enables support for systems with more than one CPU. If you have
 488           a system with only one CPU, like most personal computers, say N. If
 489           you have a system with more than one CPU, say Y.
 490
 491           If you say N here, the kernel will run on single and multiprocessor
 492           machines, but will use only one CPU of a multiprocessor machine. If
 493           you say Y here, the kernel will run on many, but not all, single
 494           processor machines. On a single processor machine, the kernel will
 495           run faster if you say N here.
 496
 497           See also the <file:Documentation/smp.txt>,
 498           <file:Documentation/i386/IO-APIC.txt>,
 499           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 500           <http://www.linuxdoc.org/docs.html#howto>.
 501
 502           If you don't know what to do here, say N.
 503
 504 config NR_CPUS
 505         int "Maximum number of CPUs (2-32)"
 506         range 2 32
 507         depends on SMP
 508         default "4"
 509
 510 config HOTPLUG_CPU
 511         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 512         depends on SMP && HOTPLUG && EXPERIMENTAL
 513         help
 514           Say Y here to experiment with turning CPUs off and on.  CPUs
 515           can be controlled through /sys/devices/system/cpu.
 516
 517 config LOCAL_TIMERS
 518         bool "Use local timer interrupts"
 519         depends on SMP && REALVIEW_MPCORE
 520         default y
 521         help
 522           Enable support for local timers on SMP platforms, rather then the
 523           legacy IPI broadcast method.  Local timers allows the system
 524           accounting to be spread across the timer interval, preventing a
 525           "thundering herd" at every timer tick.
 526
 527 config PREEMPT
 528         bool "Preemptible Kernel (EXPERIMENTAL)"
 529         depends on EXPERIMENTAL
 530         help
 531           This option reduces the latency of the kernel when reacting to
 532           real-time or interactive events by allowing a low priority process to
 533           be preempted even if it is in kernel mode executing a system call.
 534           This allows applications to run more reliably even when the system is
 535           under load.
 536
 537           Say Y here if you are building a kernel for a desktop, embedded
 538           or real-time system.  Say N if you are unsure.
 539
 540 config NO_IDLE_HZ
 541         bool "Dynamic tick timer"
 542         help
 543           Select this option if you want to disable continuous timer ticks
 544           and have them programmed to occur as required. This option saves
 545           power as the system can remain in idle state for longer.
 546
 547           By default dynamic tick is disabled during the boot, and can be
 548           manually enabled with:
 549
 550             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 551
 552           Alternatively, if you want dynamic tick automatically enabled
 553           during boot, pass "dyntick=enable" via the kernel command string.
 554
 555           Please note that dynamic tick may affect the accuracy of
 556           timekeeping on some platforms depending on the implementation.
 557           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 558           to have accurate timekeeping with dynamic tick.
 559
 560 config HZ
 561         int
 562         default 128 if ARCH_L7200
 563         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 564         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 565         default 100
 566
 567 config AEABI
 568         bool "Use the ARM EABI to compile the kernel"
 569         help
 570           This option allows for the kernel to be compiled using the latest
 571           ARM ABI (aka EABI).  This is only useful if you are using a user
 572           space environment that is also compiled with EABI.
 573
 574           Since there are major incompatibilities between the legacy ABI and
 575           EABI, especially with regard to structure member alignment, this
 576           option also changes the kernel syscall calling convention to
 577           disambiguate both ABIs and allow for backward compatibility support
 578           (selected with CONFIG_OABI_COMPAT).
 579
 580           To use this you need GCC version 4.0.0 or later.
 581
 582 config OABI_COMPAT
 583         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 584         depends on AEABI && EXPERIMENTAL
 585         default y
 586         help
 587           This option preserves the old syscall interface along with the
 588           new (ARM EABI) one. It also provides a compatibility layer to
 589           intercept syscalls that have structure arguments which layout
 590           in memory differs between the legacy ABI and the new ARM EABI
 591           (only for non "thumb" binaries). This option adds a tiny
 592           overhead to all syscalls and produces a slightly larger kernel.
 593           If you know you'll be using only pure EABI user space then you
 594           can say N here. If this option is not selected and you attempt
 595           to execute a legacy ABI binary then the result will be
 596           UNPREDICTABLE (in fact it can be predicted that it won't work
 597           at all). If in doubt say Y.
 598
 599 config ARCH_DISCONTIGMEM_ENABLE
 600         bool
 601         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 602         help
 603           Say Y to support efficient handling of discontiguous physical memory,
 604           for architectures which are either NUMA (Non-Uniform Memory Access)
 605           or have huge holes in the physical address space for other reasons.
 606           See <file:Documentation/vm/numa> for more.
 607
 608 config NODES_SHIFT
 609         int
 610         default "4" if ARCH_LH7A40X
 611         default "2"
 612         depends on NEED_MULTIPLE_NODES
 613
 614 source "mm/Kconfig"
 615
 616 config LEDS
 617         bool "Timer and CPU usage LEDs"
 618         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 619                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 620                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 621                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 622                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 623                    ARCH_AT91 || MACH_TRIZEPS4
 624         help
 625           If you say Y here, the LEDs on your machine will be used
 626           to provide useful information about your current system status.
 627
 628           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 629           be able to select which LEDs are active using the options below. If
 630           you are compiling a kernel for the EBSA-110 or the LART however, the
 631           red LED will simply flash regularly to indicate that the system is
 632           still functional. It is safe to say Y here if you have a CATS
 633           system, but the driver will do nothing.
 634
 635 config LEDS_TIMER
 636         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 637                             MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 638         depends on LEDS
 639         default y if ARCH_EBSA110
 640         help
 641           If you say Y here, one of the system LEDs (the green one on the
 642           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 643           will flash regularly to indicate that the system is still
 644           operational. This is mainly useful to kernel hackers who are
 645           debugging unstable kernels.
 646
 647           The LART uses the same LED for both Timer LED and CPU usage LED
 648           functions. You may choose to use both, but the Timer LED function
 649           will overrule the CPU usage LED.
 650
 651 config LEDS_CPU
 652         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 653                         !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 654         depends on LEDS
 655         help
 656           If you say Y here, the red LED will be used to give a good real
 657           time indication of CPU usage, by lighting whenever the idle task
 658           is not currently executing.
 659
 660           The LART uses the same LED for both Timer LED and CPU usage LED
 661           functions. You may choose to use both, but the Timer LED function
 662           will overrule the CPU usage LED.
 663
 664 config ALIGNMENT_TRAP
 665         bool
 666         depends on CPU_CP15_MMU
 667         default y if !ARCH_EBSA110
 668         help
 669           ARM processors cannot fetch/store information which is not
 670           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 671           address divisible by 4. On 32-bit ARM processors, these non-aligned
 672           fetch/store instructions will be emulated in software if you say
 673           here, which has a severe performance impact. This is necessary for
 674           correct operation of some network protocols. With an IP-only
 675           configuration it is safe to say N, otherwise say Y.
 676
 677 endmenu
 678
 679 menu "Boot options"
 680
 681 # Compressed boot loader in ROM.  Yes, we really want to ask about
 682 # TEXT and BSS so we preserve their values in the config files.
 683 config ZBOOT_ROM_TEXT
 684         hex "Compressed ROM boot loader base address"
 685         default "0"
 686         help
 687           The physical address at which the ROM-able zImage is to be
 688           placed in the target.  Platforms which normally make use of
 689           ROM-able zImage formats normally set this to a suitable
 690           value in their defconfig file.
 691
 692           If ZBOOT_ROM is not enabled, this has no effect.
 693
 694 config ZBOOT_ROM_BSS
 695         hex "Compressed ROM boot loader BSS address"
 696         default "0"
 697         help
 698           The base address of an area of read/write memory in the target
 699           for the ROM-able zImage which must be available while the
 700           decompressor is running. It must be large enough to hold the
 701           entire decompressed kernel plus an additional 128 KiB.
 702           Platforms which normally make use of ROM-able zImage formats
 703           normally set this to a suitable value in their defconfig file.
 704
 705           If ZBOOT_ROM is not enabled, this has no effect.
 706
 707 config ZBOOT_ROM
 708         bool "Compressed boot loader in ROM/flash"
 709         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 710         help
 711           Say Y here if you intend to execute your compressed kernel image
 712           (zImage) directly from ROM or flash.  If unsure, say N.
 713
 714 config CMDLINE
 715         string "Default kernel command string"
 716         default ""
 717         help
 718           On some architectures (EBSA110 and CATS), there is currently no way
 719           for the boot loader to pass arguments to the kernel. For these
 720           architectures, you should supply some command-line options at build
 721           time by entering them here. As a minimum, you should specify the
 722           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 723
 724 config XIP_KERNEL
 725         bool "Kernel Execute-In-Place from ROM"
 726         depends on !ZBOOT_ROM
 727         help
 728           Execute-In-Place allows the kernel to run from non-volatile storage
 729           directly addressable by the CPU, such as NOR flash. This saves RAM
 730           space since the text section of the kernel is not loaded from flash
 731           to RAM.  Read-write sections, such as the data section and stack,
 732           are still copied to RAM.  The XIP kernel is not compressed since
 733           it has to run directly from flash, so it will take more space to
 734           store it.  The flash address used to link the kernel object files,
 735           and for storing it, is configuration dependent. Therefore, if you
 736           say Y here, you must know the proper physical address where to
 737           store the kernel image depending on your own flash memory usage.
 738
 739           Also note that the make target becomes "make xipImage" rather than
 740           "make zImage" or "make Image".  The final kernel binary to put in
 741           ROM memory will be arch/arm/boot/xipImage.
 742
 743           If unsure, say N.
 744
 745 config XIP_PHYS_ADDR
 746         hex "XIP Kernel Physical Location"
 747         depends on XIP_KERNEL
 748         default "0x00080000"
 749         help
 750           This is the physical address in your flash memory the kernel will
 751           be linked for and stored to.  This address is dependent on your
 752           own flash usage.
 753
 754 endmenu
 755
 756 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
 757
 758 menu "CPU Frequency scaling"
 759
 760 source "drivers/cpufreq/Kconfig"
 761
 762 config CPU_FREQ_SA1100
 763         bool
 764         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 765         default y
 766
 767 config CPU_FREQ_SA1110
 768         bool
 769         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 770         default y
 771
 772 config CPU_FREQ_INTEGRATOR
 773         tristate "CPUfreq driver for ARM Integrator CPUs"
 774         depends on ARCH_INTEGRATOR && CPU_FREQ
 775         default y
 776         help
 777           This enables the CPUfreq driver for ARM Integrator CPUs.
 778
 779           For details, take a look at <file:Documentation/cpu-freq>.
 780
 781           If in doubt, say Y.
 782
 783 config CPU_FREQ_IMX
 784         tristate "CPUfreq driver for i.MX CPUs"
 785         depends on ARCH_IMX && CPU_FREQ
 786         default n
 787         help
 788           This enables the CPUfreq driver for i.MX CPUs.
 789
 790           If in doubt, say N.
 791
 792 endmenu
 793
 794 endif
 795
 796 menu "Floating point emulation"
 797
 798 comment "At least one emulation must be selected"
 799
 800 config FPE_NWFPE
 801         bool "NWFPE math emulation"
 802         depends on !AEABI || OABI_COMPAT
 803         ---help---
 804           Say Y to include the NWFPE floating point emulator in the kernel.
 805           This is necessary to run most binaries. Linux does not currently
 806           support floating point hardware so you need to say Y here even if
 807           your machine has an FPA or floating point co-processor podule.
 808
 809           You may say N here if you are going to load the Acorn FPEmulator
 810           early in the bootup.
 811
 812 config FPE_NWFPE_XP
 813         bool "Support extended precision"
 814         depends on FPE_NWFPE
 815         help
 816           Say Y to include 80-bit support in the kernel floating-point
 817           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 818           Note that gcc does not generate 80-bit operations by default,
 819           so in most cases this option only enlarges the size of the
 820           floating point emulator without any good reason.
 821
 822           You almost surely want to say N here.
 823
 824 config FPE_FASTFPE
 825         bool "FastFPE math emulation (EXPERIMENTAL)"
 826         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 827         ---help---
 828           Say Y here to include the FAST floating point emulator in the kernel.
 829           This is an experimental much faster emulator which now also has full
 830           precision for the mantissa.  It does not support any exceptions.
 831           It is very simple, and approximately 3-6 times faster than NWFPE.
 832
 833           It should be sufficient for most programs.  It may be not suitable
 834           for scientific calculations, but you have to check this for yourself.
 835           If you do not feel you need a faster FP emulation you should better
 836           choose NWFPE.
 837
 838 config VFP
 839         bool "VFP-format floating point maths"
 840         depends on CPU_V6 || CPU_ARM926T
 841         help
 842           Say Y to include VFP support code in the kernel. This is needed
 843           if your hardware includes a VFP unit.
 844
 845           Please see <file:Documentation/arm/VFP/release-notes.txt> for
 846           release notes and additional status information.
 847
 848           Say N if your target does not have VFP hardware.
 849
 850 endmenu
 851
 852 menu "Userspace binary formats"
 853
 854 source "fs/Kconfig.binfmt"
 855
 856 config ARTHUR
 857         tristate "RISC OS personality"
 858         depends on !AEABI
 859         help
 860           Say Y here to include the kernel code necessary if you want to run
 861           Acorn RISC OS/Arthur binaries under Linux. This code is still very
 862           experimental; if this sounds frightening, say N and sleep in peace.
 863           You can also say M here to compile this support as a module (which
 864           will be called arthur).
 865
 866 endmenu
 867
 868 menu "Power management options"
 869
 870 source "kernel/power/Kconfig"
 871
 872 endmenu
 873
 874 source "net/Kconfig"
 875
 876 menu "Device Drivers"
 877
 878 source "drivers/base/Kconfig"
 879
 880 source "drivers/connector/Kconfig"
 881
 882 if ALIGNMENT_TRAP || !CPU_CP15_MMU
 883 source "drivers/mtd/Kconfig"
 884 endif
 885
 886 source "drivers/parport/Kconfig"
 887
 888 source "drivers/pnp/Kconfig"
 889
 890 source "drivers/block/Kconfig"
 891
 892 source "drivers/acorn/block/Kconfig"
 893
 894 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
 895         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
 896         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
 897         || ARCH_IXP23XX
 898 source "drivers/ide/Kconfig"
 899 endif
 900
 901 source "drivers/scsi/Kconfig"
 902
 903 source "drivers/ata/Kconfig"
 904
 905 source "drivers/md/Kconfig"
 906
 907 source "drivers/message/fusion/Kconfig"
 908
 909 source "drivers/ieee1394/Kconfig"
 910
 911 source "drivers/message/i2o/Kconfig"
 912
 913 source "drivers/net/Kconfig"
 914
 915 source "drivers/isdn/Kconfig"
 916
 917 # input before char - char/joystick depends on it. As does USB.
 918
 919 source "drivers/input/Kconfig"
 920
 921 source "drivers/char/Kconfig"
 922
 923 source "drivers/i2c/Kconfig"
 924
 925 source "drivers/spi/Kconfig"
 926
 927 source "drivers/w1/Kconfig"
 928
 929 source "drivers/hwmon/Kconfig"
 930
 931 #source "drivers/l3/Kconfig"
 932
 933 source "drivers/misc/Kconfig"
 934
 935 source "drivers/mfd/Kconfig"
 936
 937 source "drivers/leds/Kconfig"
 938
 939 source "drivers/media/Kconfig"
 940
 941 source "drivers/video/Kconfig"
 942
 943 source "sound/Kconfig"
 944
 945 source "drivers/hid/Kconfig"
 946
 947 source "drivers/usb/Kconfig"
 948
 949 source "drivers/mmc/Kconfig"
 950
 951 source "drivers/rtc/Kconfig"
 952
 953 endmenu
 954
 955 source "fs/Kconfig"
 956
 957 source "arch/arm/oprofile/Kconfig"
 958
 959 source "arch/arm/Kconfig.debug"
 960
 961 source "security/Kconfig"
 962
 963 source "crypto/Kconfig"
 964
 965 source "lib/Kconfig"