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_GPIO
  25         bool
  26         default n
  27
  28 config GENERIC_TIME
  29         bool
  30         default n
  31
  32 config GENERIC_CLOCKEVENTS
  33         bool
  34         default n
  35
  36 config MMU
  37         bool
  38         default y
  39
  40 config NO_IOPORT
  41         bool
  42         default n
  43
  44 config EISA
  45         bool
  46         ---help---
  47           The Extended Industry Standard Architecture (EISA) bus was
  48           developed as an open alternative to the IBM MicroChannel bus.
  49
  50           The EISA bus provided some of the features of the IBM MicroChannel
  51           bus while maintaining backward compatibility with cards made for
  52           the older ISA bus.  The EISA bus saw limited use between 1988 and
  53           1995 when it was made obsolete by the PCI bus.
  54
  55           Say Y here if you are building a kernel for an EISA-based machine.
  56
  57           Otherwise, say N.
  58
  59 config SBUS
  60         bool
  61
  62 config MCA
  63         bool
  64         help
  65           MicroChannel Architecture is found in some IBM PS/2 machines and
  66           laptops.  It is a bus system similar to PCI or ISA. See
  67           <file:Documentation/mca.txt> (and especially the web page given
  68           there) before attempting to build an MCA bus kernel.
  69
  70 config GENERIC_HARDIRQS
  71         bool
  72         default y
  73
  74 config STACKTRACE_SUPPORT
  75         bool
  76         default y
  77
  78 config LOCKDEP_SUPPORT
  79         bool
  80         default y
  81
  82 config TRACE_IRQFLAGS_SUPPORT
  83         bool
  84         default y
  85
  86 config HARDIRQS_SW_RESEND
  87         bool
  88         default y
  89
  90 config GENERIC_IRQ_PROBE
  91         bool
  92         default y
  93
  94 config RWSEM_GENERIC_SPINLOCK
  95         bool
  96         default y
  97
  98 config RWSEM_XCHGADD_ALGORITHM
  99         bool
 100
 101 config ARCH_HAS_ILOG2_U32
 102         bool
 103         default n
 104
 105 config ARCH_HAS_ILOG2_U64
 106         bool
 107         default n
 108
 109 config GENERIC_HWEIGHT
 110         bool
 111         default y
 112
 113 config GENERIC_CALIBRATE_DELAY
 114         bool
 115         default y
 116
 117 config ARCH_MAY_HAVE_PC_FDC
 118         bool
 119
 120 config ZONE_DMA
 121         bool
 122         default y
 123
 124 config GENERIC_ISA_DMA
 125         bool
 126
 127 config FIQ
 128         bool
 129
 130 config ARCH_MTD_XIP
 131         bool
 132
 133 config VECTORS_BASE
 134         hex
 135         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 136         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 137         default 0x00000000
 138         help
 139           The base address of exception vectors.
 140
 141 source "init/Kconfig"
 142
 143 menu "System Type"
 144
 145 choice
 146         prompt "ARM system type"
 147         default ARCH_VERSATILE
 148
 149 config ARCH_AAEC2000
 150         bool "Agilent AAEC-2000 based"
 151         select ARM_AMBA
 152         help
 153           This enables support for systems based on the Agilent AAEC-2000
 154
 155 config ARCH_INTEGRATOR
 156         bool "ARM Ltd. Integrator family"
 157         select ARM_AMBA
 158         select ICST525
 159         help
 160           Support for ARM's Integrator platform.
 161
 162 config ARCH_REALVIEW
 163         bool "ARM Ltd. RealView family"
 164         select ARM_AMBA
 165         select ICST307
 166         help
 167           This enables support for ARM Ltd RealView boards.
 168
 169 config ARCH_VERSATILE
 170         bool "ARM Ltd. Versatile family"
 171         select ARM_AMBA
 172         select ARM_VIC
 173         select ICST307
 174         select GENERIC_TIME
 175         select GENERIC_CLOCKEVENTS
 176         help
 177           This enables support for ARM Ltd Versatile board.
 178
 179 config ARCH_AT91
 180         bool "Atmel AT91"
 181         select GENERIC_GPIO
 182         help
 183           This enables support for systems based on the Atmel AT91RM9200
 184           and AT91SAM9xxx processors.
 185
 186 config ARCH_CLPS7500
 187         bool "Cirrus CL-PS7500FE"
 188         select TIMER_ACORN
 189         select ISA
 190         select NO_IOPORT
 191         help
 192           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 193
 194 config ARCH_CLPS711X
 195         bool "Cirrus Logic CLPS711x/EP721x-based"
 196         help
 197           Support for Cirrus Logic 711x/721x based boards.
 198
 199 config ARCH_CO285
 200         bool "Co-EBSA285"
 201         select FOOTBRIDGE
 202         select FOOTBRIDGE_ADDIN
 203         help
 204           Support for Intel's EBSA285 companion chip.
 205
 206 config ARCH_EBSA110
 207         bool "EBSA-110"
 208         select ISA
 209         select NO_IOPORT
 210         help
 211           This is an evaluation board for the StrongARM processor available
 212           from Digital. It has limited hardware on-board, including an
 213           Ethernet interface, two PCMCIA sockets, two serial ports and a
 214           parallel port.
 215
 216 config ARCH_EP93XX
 217         bool "EP93xx-based"
 218         select ARM_AMBA
 219         select ARM_VIC
 220         help
 221           This enables support for the Cirrus EP93xx series of CPUs.
 222
 223 config ARCH_FOOTBRIDGE
 224         bool "FootBridge"
 225         select FOOTBRIDGE
 226         help
 227           Support for systems based on the DC21285 companion chip
 228           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 229
 230 config ARCH_NETX
 231         bool "Hilscher NetX based"
 232         select ARM_VIC
 233         help
 234           This enables support for systems based on the Hilscher NetX Soc
 235
 236 config ARCH_H720X
 237         bool "Hynix HMS720x-based"
 238         select ISA_DMA_API
 239         help
 240           This enables support for systems based on the Hynix HMS720x
 241
 242 config ARCH_IMX
 243         bool "IMX"
 244         help
 245           Support for Motorola's i.MX family of processors (MX1, MXL).
 246
 247 config ARCH_IOP13XX
 248         bool "IOP13xx-based"
 249         depends on MMU
 250         select PLAT_IOP
 251         select PCI
 252         select ARCH_SUPPORTS_MSI
 253         help
 254           Support for Intel's IOP13XX (XScale) family of processors.
 255
 256 config ARCH_IOP32X
 257         bool "IOP32x-based"
 258         depends on MMU
 259         select PLAT_IOP
 260         select PCI
 261         help
 262           Support for Intel's 80219 and IOP32X (XScale) family of
 263           processors.
 264
 265 config ARCH_IOP33X
 266         bool "IOP33x-based"
 267         depends on MMU
 268         select PLAT_IOP
 269         select PCI
 270         help
 271           Support for Intel's IOP33X (XScale) family of processors.
 272
 273 config ARCH_IXP23XX
 274         bool "IXP23XX-based"
 275         depends on MMU
 276         select PCI
 277         help
 278           Support for Intel's IXP23xx (XScale) family of processors.
 279
 280 config ARCH_IXP2000
 281         bool "IXP2400/2800-based"
 282         depends on MMU
 283         select PCI
 284         help
 285           Support for Intel's IXP2400/2800 (XScale) family of processors.
 286
 287 config ARCH_IXP4XX
 288         bool "IXP4xx-based"
 289         depends on MMU
 290         select GENERIC_GPIO
 291         select GENERIC_TIME
 292         select GENERIC_CLOCKEVENTS
 293         help
 294           Support for Intel's IXP4XX (XScale) family of processors.
 295
 296 config ARCH_L7200
 297         bool "LinkUp-L7200"
 298         select FIQ
 299         help
 300           Say Y here if you intend to run this kernel on a LinkUp Systems
 301           L7200 Software Development Board which uses an ARM720T processor.
 302           Information on this board can be obtained at:
 303
 304           <http://www.linkupsys.com/>
 305
 306           If you have any questions or comments about the Linux kernel port
 307           to this board, send e-mail to <sjhill@cotw.com>.
 308
 309 config ARCH_KS8695
 310         bool "Micrel/Kendin KS8695"
 311         help
 312           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 313           System-on-Chip devices.
 314
 315 config ARCH_NS9XXX
 316         bool "NetSilicon NS9xxx"
 317         help
 318           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 319           System.
 320
 321           <http://www.digi.com/products/microprocessors/index.jsp>
 322
 323 config ARCH_PNX4008
 324         bool "Philips Nexperia PNX4008 Mobile"
 325         help
 326           This enables support for Philips PNX4008 mobile platform.
 327
 328 config ARCH_PXA
 329         bool "PXA2xx-based"
 330         depends on MMU
 331         select ARCH_MTD_XIP
 332         select GENERIC_GPIO
 333         select GENERIC_TIME
 334         help
 335           Support for Intel's PXA2XX processor line.
 336
 337 config ARCH_RPC
 338         bool "RiscPC"
 339         select ARCH_ACORN
 340         select FIQ
 341         select TIMER_ACORN
 342         select ARCH_MAY_HAVE_PC_FDC
 343         select ISA_DMA_API
 344         select NO_IOPORT
 345         help
 346           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 347           CD-ROM interface, serial and parallel port, and the floppy drive.
 348
 349 config ARCH_SA1100
 350         bool "SA1100-based"
 351         select ISA
 352         select ARCH_DISCONTIGMEM_ENABLE
 353         select ARCH_MTD_XIP
 354         select GENERIC_GPIO
 355         help
 356           Support for StrongARM 11x0 based boards.
 357
 358 config ARCH_S3C2410
 359         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 360         select GENERIC_GPIO
 361         help
 362           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 363           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 364           the Samsung SMDK2410 development board (and derivatives).
 365
 366 config ARCH_SHARK
 367         bool "Shark"
 368         select ISA
 369         select ISA_DMA
 370         select PCI
 371         help
 372           Support for the StrongARM based Digital DNARD machine, also known
 373           as "Shark" (<http://www.shark-linux.de/shark.html>).
 374
 375 config ARCH_LH7A40X
 376         bool "Sharp LH7A40X"
 377         help
 378           Say Y here for systems based on one of the Sharp LH7A40X
 379           System on a Chip processors.  These CPUs include an ARM922T
 380           core with a wide array of integrated devices for
 381           hand-held and low-power applications.
 382
 383 config ARCH_DAVINCI
 384         bool "TI DaVinci"
 385         select GENERIC_TIME
 386         select GENERIC_CLOCKEVENTS
 387         help
 388           Support for TI's DaVinci platform.
 389
 390 config ARCH_OMAP
 391         bool "TI OMAP"
 392         select GENERIC_GPIO
 393         select GENERIC_TIME
 394         help
 395           Support for TI's OMAP platform (OMAP1 and OMAP2).
 396
 397 endchoice
 398
 399 source "arch/arm/mach-clps711x/Kconfig"
 400
 401 source "arch/arm/mach-ep93xx/Kconfig"
 402
 403 source "arch/arm/mach-footbridge/Kconfig"
 404
 405 source "arch/arm/mach-integrator/Kconfig"
 406
 407 source "arch/arm/mach-iop32x/Kconfig"
 408
 409 source "arch/arm/mach-iop33x/Kconfig"
 410
 411 source "arch/arm/mach-iop13xx/Kconfig"
 412
 413 source "arch/arm/mach-ixp4xx/Kconfig"
 414
 415 source "arch/arm/mach-ixp2000/Kconfig"
 416
 417 source "arch/arm/mach-ixp23xx/Kconfig"
 418
 419 source "arch/arm/mach-pxa/Kconfig"
 420
 421 source "arch/arm/mach-sa1100/Kconfig"
 422
 423 source "arch/arm/plat-omap/Kconfig"
 424
 425 source "arch/arm/mach-omap1/Kconfig"
 426
 427 source "arch/arm/mach-omap2/Kconfig"
 428
 429 source "arch/arm/plat-s3c24xx/Kconfig"
 430
 431 if ARCH_S3C2410
 432 source "arch/arm/mach-s3c2400/Kconfig"
 433 source "arch/arm/mach-s3c2410/Kconfig"
 434 source "arch/arm/mach-s3c2412/Kconfig"
 435 source "arch/arm/mach-s3c2440/Kconfig"
 436 source "arch/arm/mach-s3c2442/Kconfig"
 437 source "arch/arm/mach-s3c2443/Kconfig"
 438 endif
 439
 440 source "arch/arm/mach-lh7a40x/Kconfig"
 441
 442 source "arch/arm/mach-imx/Kconfig"
 443
 444 source "arch/arm/mach-h720x/Kconfig"
 445
 446 source "arch/arm/mach-versatile/Kconfig"
 447
 448 source "arch/arm/mach-aaec2000/Kconfig"
 449
 450 source "arch/arm/mach-realview/Kconfig"
 451
 452 source "arch/arm/mach-at91/Kconfig"
 453
 454 source "arch/arm/mach-netx/Kconfig"
 455
 456 source "arch/arm/mach-ns9xxx/Kconfig"
 457
 458 source "arch/arm/mach-davinci/Kconfig"
 459
 460 source "arch/arm/mach-ks8695/Kconfig"
 461
 462 # Definitions to make life easier
 463 config ARCH_ACORN
 464         bool
 465
 466 config PLAT_IOP
 467         bool
 468
 469 source arch/arm/mm/Kconfig
 470
 471 config IWMMXT
 472         bool "Enable iWMMXt support"
 473         depends on CPU_XSCALE || CPU_XSC3
 474         default y if PXA27x
 475         help
 476           Enable support for iWMMXt context switching at run time if
 477           running on a CPU that supports it.
 478
 479 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 480 config XSCALE_PMU
 481         bool
 482         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 483         default y
 484
 485 if !MMU
 486 source "arch/arm/Kconfig-nommu"
 487 endif
 488
 489 endmenu
 490
 491 source "arch/arm/common/Kconfig"
 492
 493 config FORCE_MAX_ZONEORDER
 494         int
 495         depends on SA1111
 496         default "9"
 497
 498 menu "Bus support"
 499
 500 config ARM_AMBA
 501         bool
 502
 503 config ISA
 504         bool
 505         help
 506           Find out whether you have ISA slots on your motherboard.  ISA is the
 507           name of a bus system, i.e. the way the CPU talks to the other stuff
 508           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 509           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 510           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 511
 512 # Select ISA DMA controller support
 513 config ISA_DMA
 514         bool
 515         select ISA_DMA_API
 516
 517 # Select ISA DMA interface
 518 config ISA_DMA_API
 519         bool
 520
 521 config PCI
 522         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695
 523         help
 524           Find out whether you have a PCI motherboard. PCI is the name of a
 525           bus system, i.e. the way the CPU talks to the other stuff inside
 526           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 527           VESA. If you have PCI, say Y, otherwise N.
 528
 529           The PCI-HOWTO, available from
 530           <http://www.tldp.org/docs.html#howto>, contains valuable
 531           information about which PCI hardware does work under Linux and which
 532           doesn't.
 533
 534 # Select the host bridge type
 535 config PCI_HOST_VIA82C505
 536         bool
 537         depends on PCI && ARCH_SHARK
 538         default y
 539
 540 source "drivers/pci/Kconfig"
 541
 542 source "drivers/pcmcia/Kconfig"
 543
 544 endmenu
 545
 546 menu "Kernel Features"
 547
 548 source "kernel/time/Kconfig"
 549
 550 config SMP
 551         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 552         depends on EXPERIMENTAL && REALVIEW_MPCORE
 553         help
 554           This enables support for systems with more than one CPU. If you have
 555           a system with only one CPU, like most personal computers, say N. If
 556           you have a system with more than one CPU, say Y.
 557
 558           If you say N here, the kernel will run on single and multiprocessor
 559           machines, but will use only one CPU of a multiprocessor machine. If
 560           you say Y here, the kernel will run on many, but not all, single
 561           processor machines. On a single processor machine, the kernel will
 562           run faster if you say N here.
 563
 564           See also the <file:Documentation/smp.txt>,
 565           <file:Documentation/i386/IO-APIC.txt>,
 566           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 567           <http://www.linuxdoc.org/docs.html#howto>.
 568
 569           If you don't know what to do here, say N.
 570
 571 config NR_CPUS
 572         int "Maximum number of CPUs (2-32)"
 573         range 2 32
 574         depends on SMP
 575         default "4"
 576
 577 config HOTPLUG_CPU
 578         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 579         depends on SMP && HOTPLUG && EXPERIMENTAL
 580         help
 581           Say Y here to experiment with turning CPUs off and on.  CPUs
 582           can be controlled through /sys/devices/system/cpu.
 583
 584 config LOCAL_TIMERS
 585         bool "Use local timer interrupts"
 586         depends on SMP && REALVIEW_MPCORE
 587         default y
 588         help
 589           Enable support for local timers on SMP platforms, rather then the
 590           legacy IPI broadcast method.  Local timers allows the system
 591           accounting to be spread across the timer interval, preventing a
 592           "thundering herd" at every timer tick.
 593
 594 config PREEMPT
 595         bool "Preemptible Kernel (EXPERIMENTAL)"
 596         depends on EXPERIMENTAL
 597         help
 598           This option reduces the latency of the kernel when reacting to
 599           real-time or interactive events by allowing a low priority process to
 600           be preempted even if it is in kernel mode executing a system call.
 601           This allows applications to run more reliably even when the system is
 602           under load.
 603
 604           Say Y here if you are building a kernel for a desktop, embedded
 605           or real-time system.  Say N if you are unsure.
 606
 607 config NO_IDLE_HZ
 608         bool "Dynamic tick timer"
 609         depends on !GENERIC_CLOCKEVENTS
 610         help
 611           Select this option if you want to disable continuous timer ticks
 612           and have them programmed to occur as required. This option saves
 613           power as the system can remain in idle state for longer.
 614
 615           By default dynamic tick is disabled during the boot, and can be
 616           manually enabled with:
 617
 618             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 619
 620           Alternatively, if you want dynamic tick automatically enabled
 621           during boot, pass "dyntick=enable" via the kernel command string.
 622
 623           Please note that dynamic tick may affect the accuracy of
 624           timekeeping on some platforms depending on the implementation.
 625           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 626           to have accurate timekeeping with dynamic tick.
 627
 628 config HZ
 629         int
 630         default 128 if ARCH_L7200
 631         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 632         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 633         default 100
 634
 635 config AEABI
 636         bool "Use the ARM EABI to compile the kernel"
 637         help
 638           This option allows for the kernel to be compiled using the latest
 639           ARM ABI (aka EABI).  This is only useful if you are using a user
 640           space environment that is also compiled with EABI.
 641
 642           Since there are major incompatibilities between the legacy ABI and
 643           EABI, especially with regard to structure member alignment, this
 644           option also changes the kernel syscall calling convention to
 645           disambiguate both ABIs and allow for backward compatibility support
 646           (selected with CONFIG_OABI_COMPAT).
 647
 648           To use this you need GCC version 4.0.0 or later.
 649
 650 config OABI_COMPAT
 651         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 652         depends on AEABI && EXPERIMENTAL
 653         default y
 654         help
 655           This option preserves the old syscall interface along with the
 656           new (ARM EABI) one. It also provides a compatibility layer to
 657           intercept syscalls that have structure arguments which layout
 658           in memory differs between the legacy ABI and the new ARM EABI
 659           (only for non "thumb" binaries). This option adds a tiny
 660           overhead to all syscalls and produces a slightly larger kernel.
 661           If you know you'll be using only pure EABI user space then you
 662           can say N here. If this option is not selected and you attempt
 663           to execute a legacy ABI binary then the result will be
 664           UNPREDICTABLE (in fact it can be predicted that it won't work
 665           at all). If in doubt say Y.
 666
 667 config ARCH_DISCONTIGMEM_ENABLE
 668         bool
 669         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 670         help
 671           Say Y to support efficient handling of discontiguous physical memory,
 672           for architectures which are either NUMA (Non-Uniform Memory Access)
 673           or have huge holes in the physical address space for other reasons.
 674           See <file:Documentation/vm/numa> for more.
 675
 676 config NODES_SHIFT
 677         int
 678         default "4" if ARCH_LH7A40X
 679         default "2"
 680         depends on NEED_MULTIPLE_NODES
 681
 682 source "mm/Kconfig"
 683
 684 config LEDS
 685         bool "Timer and CPU usage LEDs"
 686         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 687                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 688                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 689                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 690                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 691                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 692                    ARCH_KS8695
 693         help
 694           If you say Y here, the LEDs on your machine will be used
 695           to provide useful information about your current system status.
 696
 697           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 698           be able to select which LEDs are active using the options below. If
 699           you are compiling a kernel for the EBSA-110 or the LART however, the
 700           red LED will simply flash regularly to indicate that the system is
 701           still functional. It is safe to say Y here if you have a CATS
 702           system, but the driver will do nothing.
 703
 704 config LEDS_TIMER
 705         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 706                             MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 707         depends on LEDS
 708         depends on !GENERIC_CLOCKEVENTS
 709         default y if ARCH_EBSA110
 710         help
 711           If you say Y here, one of the system LEDs (the green one on the
 712           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 713           will flash regularly to indicate that the system is still
 714           operational. This is mainly useful to kernel hackers who are
 715           debugging unstable kernels.
 716
 717           The LART uses the same LED for both Timer LED and CPU usage LED
 718           functions. You may choose to use both, but the Timer LED function
 719           will overrule the CPU usage LED.
 720
 721 config LEDS_CPU
 722         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 723                         !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 724         depends on LEDS
 725         help
 726           If you say Y here, the red LED will be used to give a good real
 727           time indication of CPU usage, by lighting whenever the idle task
 728           is not currently executing.
 729
 730           The LART uses the same LED for both Timer LED and CPU usage LED
 731           functions. You may choose to use both, but the Timer LED function
 732           will overrule the CPU usage LED.
 733
 734 config ALIGNMENT_TRAP
 735         bool
 736         depends on CPU_CP15_MMU
 737         default y if !ARCH_EBSA110
 738         help
 739           ARM processors cannot fetch/store information which is not
 740           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 741           address divisible by 4. On 32-bit ARM processors, these non-aligned
 742           fetch/store instructions will be emulated in software if you say
 743           here, which has a severe performance impact. This is necessary for
 744           correct operation of some network protocols. With an IP-only
 745           configuration it is safe to say N, otherwise say Y.
 746
 747 endmenu
 748
 749 menu "Boot options"
 750
 751 # Compressed boot loader in ROM.  Yes, we really want to ask about
 752 # TEXT and BSS so we preserve their values in the config files.
 753 config ZBOOT_ROM_TEXT
 754         hex "Compressed ROM boot loader base address"
 755         default "0"
 756         help
 757           The physical address at which the ROM-able zImage is to be
 758           placed in the target.  Platforms which normally make use of
 759           ROM-able zImage formats normally set this to a suitable
 760           value in their defconfig file.
 761
 762           If ZBOOT_ROM is not enabled, this has no effect.
 763
 764 config ZBOOT_ROM_BSS
 765         hex "Compressed ROM boot loader BSS address"
 766         default "0"
 767         help
 768           The base address of an area of read/write memory in the target
 769           for the ROM-able zImage which must be available while the
 770           decompressor is running. It must be large enough to hold the
 771           entire decompressed kernel plus an additional 128 KiB.
 772           Platforms which normally make use of ROM-able zImage formats
 773           normally set this to a suitable value in their defconfig file.
 774
 775           If ZBOOT_ROM is not enabled, this has no effect.
 776
 777 config ZBOOT_ROM
 778         bool "Compressed boot loader in ROM/flash"
 779         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 780         help
 781           Say Y here if you intend to execute your compressed kernel image
 782           (zImage) directly from ROM or flash.  If unsure, say N.
 783
 784 config CMDLINE
 785         string "Default kernel command string"
 786         default ""
 787         help
 788           On some architectures (EBSA110 and CATS), there is currently no way
 789           for the boot loader to pass arguments to the kernel. For these
 790           architectures, you should supply some command-line options at build
 791           time by entering them here. As a minimum, you should specify the
 792           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 793
 794 config XIP_KERNEL
 795         bool "Kernel Execute-In-Place from ROM"
 796         depends on !ZBOOT_ROM
 797         help
 798           Execute-In-Place allows the kernel to run from non-volatile storage
 799           directly addressable by the CPU, such as NOR flash. This saves RAM
 800           space since the text section of the kernel is not loaded from flash
 801           to RAM.  Read-write sections, such as the data section and stack,
 802           are still copied to RAM.  The XIP kernel is not compressed since
 803           it has to run directly from flash, so it will take more space to
 804           store it.  The flash address used to link the kernel object files,
 805           and for storing it, is configuration dependent. Therefore, if you
 806           say Y here, you must know the proper physical address where to
 807           store the kernel image depending on your own flash memory usage.
 808
 809           Also note that the make target becomes "make xipImage" rather than
 810           "make zImage" or "make Image".  The final kernel binary to put in
 811           ROM memory will be arch/arm/boot/xipImage.
 812
 813           If unsure, say N.
 814
 815 config XIP_PHYS_ADDR
 816         hex "XIP Kernel Physical Location"
 817         depends on XIP_KERNEL
 818         default "0x00080000"
 819         help
 820           This is the physical address in your flash memory the kernel will
 821           be linked for and stored to.  This address is dependent on your
 822           own flash usage.
 823
 824 config KEXEC
 825         bool "Kexec system call (EXPERIMENTAL)"
 826         depends on EXPERIMENTAL
 827         help
 828           kexec is a system call that implements the ability to shutdown your
 829           current kernel, and to start another kernel.  It is like a reboot
 830           but it is indepedent of the system firmware.   And like a reboot
 831           you can start any kernel with it, not just Linux.
 832
 833           It is an ongoing process to be certain the hardware in a machine
 834           is properly shutdown, so do not be surprised if this code does not
 835           initially work for you.  It may help to enable device hotplugging
 836           support.
 837
 838 endmenu
 839
 840 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
 841
 842 menu "CPU Frequency scaling"
 843
 844 source "drivers/cpufreq/Kconfig"
 845
 846 config CPU_FREQ_SA1100
 847         bool
 848         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 849         default y
 850
 851 config CPU_FREQ_SA1110
 852         bool
 853         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 854         default y
 855
 856 config CPU_FREQ_INTEGRATOR
 857         tristate "CPUfreq driver for ARM Integrator CPUs"
 858         depends on ARCH_INTEGRATOR && CPU_FREQ
 859         default y
 860         help
 861           This enables the CPUfreq driver for ARM Integrator CPUs.
 862
 863           For details, take a look at <file:Documentation/cpu-freq>.
 864
 865           If in doubt, say Y.
 866
 867 config CPU_FREQ_IMX
 868         tristate "CPUfreq driver for i.MX CPUs"
 869         depends on ARCH_IMX && CPU_FREQ
 870         default n
 871         help
 872           This enables the CPUfreq driver for i.MX CPUs.
 873
 874           If in doubt, say N.
 875
 876 endmenu
 877
 878 endif
 879
 880 menu "Floating point emulation"
 881
 882 comment "At least one emulation must be selected"
 883
 884 config FPE_NWFPE
 885         bool "NWFPE math emulation"
 886         depends on !AEABI || OABI_COMPAT
 887         ---help---
 888           Say Y to include the NWFPE floating point emulator in the kernel.
 889           This is necessary to run most binaries. Linux does not currently
 890           support floating point hardware so you need to say Y here even if
 891           your machine has an FPA or floating point co-processor podule.
 892
 893           You may say N here if you are going to load the Acorn FPEmulator
 894           early in the bootup.
 895
 896 config FPE_NWFPE_XP
 897         bool "Support extended precision"
 898         depends on FPE_NWFPE
 899         help
 900           Say Y to include 80-bit support in the kernel floating-point
 901           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 902           Note that gcc does not generate 80-bit operations by default,
 903           so in most cases this option only enlarges the size of the
 904           floating point emulator without any good reason.
 905
 906           You almost surely want to say N here.
 907
 908 config FPE_FASTFPE
 909         bool "FastFPE math emulation (EXPERIMENTAL)"
 910         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 911         ---help---
 912           Say Y here to include the FAST floating point emulator in the kernel.
 913           This is an experimental much faster emulator which now also has full
 914           precision for the mantissa.  It does not support any exceptions.
 915           It is very simple, and approximately 3-6 times faster than NWFPE.
 916
 917           It should be sufficient for most programs.  It may be not suitable
 918           for scientific calculations, but you have to check this for yourself.
 919           If you do not feel you need a faster FP emulation you should better
 920           choose NWFPE.
 921
 922 config VFP
 923         bool "VFP-format floating point maths"
 924         depends on CPU_V6 || CPU_ARM926T
 925         help
 926           Say Y to include VFP support code in the kernel. This is needed
 927           if your hardware includes a VFP unit.
 928
 929           Please see <file:Documentation/arm/VFP/release-notes.txt> for
 930           release notes and additional status information.
 931
 932           Say N if your target does not have VFP hardware.
 933
 934 endmenu
 935
 936 menu "Userspace binary formats"
 937
 938 source "fs/Kconfig.binfmt"
 939
 940 config ARTHUR
 941         tristate "RISC OS personality"
 942         depends on !AEABI
 943         help
 944           Say Y here to include the kernel code necessary if you want to run
 945           Acorn RISC OS/Arthur binaries under Linux. This code is still very
 946           experimental; if this sounds frightening, say N and sleep in peace.
 947           You can also say M here to compile this support as a module (which
 948           will be called arthur).
 949
 950 endmenu
 951
 952 menu "Power management options"
 953
 954 source "kernel/power/Kconfig"
 955
 956 endmenu
 957
 958 source "net/Kconfig"
 959
 960 menu "Device Drivers"
 961
 962 source "drivers/base/Kconfig"
 963
 964 source "drivers/connector/Kconfig"
 965
 966 if ALIGNMENT_TRAP || !CPU_CP15_MMU
 967 source "drivers/mtd/Kconfig"
 968 endif
 969
 970 source "drivers/parport/Kconfig"
 971
 972 source "drivers/pnp/Kconfig"
 973
 974 source "drivers/block/Kconfig"
 975
 976 source "drivers/acorn/block/Kconfig"
 977
 978 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
 979         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
 980         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
 981         || ARCH_IXP23XX
 982 source "drivers/ide/Kconfig"
 983 endif
 984
 985 source "drivers/scsi/Kconfig"
 986
 987 source "drivers/ata/Kconfig"
 988
 989 source "drivers/md/Kconfig"
 990
 991 source "drivers/message/fusion/Kconfig"
 992
 993 source "drivers/ieee1394/Kconfig"
 994
 995 source "drivers/message/i2o/Kconfig"
 996
 997 source "drivers/net/Kconfig"
 998
 999 source "drivers/isdn/Kconfig"
1000
1001 # input before char - char/joystick depends on it. As does USB.
1002
1003 source "drivers/input/Kconfig"
1004
1005 source "drivers/char/Kconfig"
1006
1007 source "drivers/i2c/Kconfig"
1008
1009 source "drivers/spi/Kconfig"
1010
1011 source "drivers/w1/Kconfig"
1012
1013 source "drivers/hwmon/Kconfig"
1014
1015 #source "drivers/l3/Kconfig"
1016
1017 source "drivers/misc/Kconfig"
1018
1019 source "drivers/mfd/Kconfig"
1020
1021 source "drivers/leds/Kconfig"
1022
1023 source "drivers/media/Kconfig"
1024
1025 source "drivers/video/Kconfig"
1026
1027 source "sound/Kconfig"
1028
1029 source "drivers/hid/Kconfig"
1030
1031 source "drivers/usb/Kconfig"
1032
1033 source "drivers/mmc/Kconfig"
1034
1035 source "drivers/rtc/Kconfig"
1036
1037 endmenu
1038
1039 source "fs/Kconfig"
1040
1041 source "arch/arm/oprofile/Kconfig"
1042
1043 source "arch/arm/Kconfig.debug"
1044
1045 source "security/Kconfig"
1046
1047 source "crypto/Kconfig"
1048
1049 source "lib/Kconfig"