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         select GENERIC_GPIO
 245         select GENERIC_TIME
 246         select GENERIC_CLOCKEVENTS
 247         help
 248           Support for Motorola's i.MX family of processors (MX1, MXL).
 249
 250 config ARCH_IOP13XX
 251         bool "IOP13xx-based"
 252         depends on MMU
 253         select PLAT_IOP
 254         select PCI
 255         select ARCH_SUPPORTS_MSI
 256         help
 257           Support for Intel's IOP13XX (XScale) family of processors.
 258
 259 config ARCH_IOP32X
 260         bool "IOP32x-based"
 261         depends on MMU
 262         select PLAT_IOP
 263         select PCI
 264         help
 265           Support for Intel's 80219 and IOP32X (XScale) family of
 266           processors.
 267
 268 config ARCH_IOP33X
 269         bool "IOP33x-based"
 270         depends on MMU
 271         select PLAT_IOP
 272         select PCI
 273         help
 274           Support for Intel's IOP33X (XScale) family of processors.
 275
 276 config ARCH_IXP23XX
 277         bool "IXP23XX-based"
 278         depends on MMU
 279         select PCI
 280         help
 281           Support for Intel's IXP23xx (XScale) family of processors.
 282
 283 config ARCH_IXP2000
 284         bool "IXP2400/2800-based"
 285         depends on MMU
 286         select PCI
 287         help
 288           Support for Intel's IXP2400/2800 (XScale) family of processors.
 289
 290 config ARCH_IXP4XX
 291         bool "IXP4xx-based"
 292         depends on MMU
 293         select GENERIC_GPIO
 294         select GENERIC_TIME
 295         select GENERIC_CLOCKEVENTS
 296         help
 297           Support for Intel's IXP4XX (XScale) family of processors.
 298
 299 config ARCH_L7200
 300         bool "LinkUp-L7200"
 301         select FIQ
 302         help
 303           Say Y here if you intend to run this kernel on a LinkUp Systems
 304           L7200 Software Development Board which uses an ARM720T processor.
 305           Information on this board can be obtained at:
 306
 307           <http://www.linkupsys.com/>
 308
 309           If you have any questions or comments about the Linux kernel port
 310           to this board, send e-mail to <sjhill@cotw.com>.
 311
 312 config ARCH_KS8695
 313         bool "Micrel/Kendin KS8695"
 314         select GENERIC_GPIO
 315         help
 316           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 317           System-on-Chip devices.
 318
 319 config ARCH_NS9XXX
 320         bool "NetSilicon NS9xxx"
 321         select GENERIC_GPIO
 322         select GENERIC_TIME
 323         select GENERIC_CLOCKEVENTS
 324         help
 325           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 326           System.
 327
 328           <http://www.digi.com/products/microprocessors/index.jsp>
 329
 330 config ARCH_MXC
 331         bool "Freescale MXC/iMX-based"
 332         select ARCH_MTD_XIP
 333         help
 334           Support for Freescale MXC/iMX-based family of processors
 335
 336 config ARCH_PNX4008
 337         bool "Philips Nexperia PNX4008 Mobile"
 338         help
 339           This enables support for Philips PNX4008 mobile platform.
 340
 341 config ARCH_PXA
 342         bool "PXA2xx/PXA3xx-based"
 343         depends on MMU
 344         select ARCH_MTD_XIP
 345         select GENERIC_GPIO
 346         select GENERIC_TIME
 347         select GENERIC_CLOCKEVENTS
 348         help
 349           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 350
 351 config ARCH_RPC
 352         bool "RiscPC"
 353         select ARCH_ACORN
 354         select FIQ
 355         select TIMER_ACORN
 356         select ARCH_MAY_HAVE_PC_FDC
 357         select ISA_DMA_API
 358         select NO_IOPORT
 359         help
 360           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 361           CD-ROM interface, serial and parallel port, and the floppy drive.
 362
 363 config ARCH_SA1100
 364         bool "SA1100-based"
 365         select ISA
 366         select ARCH_DISCONTIGMEM_ENABLE
 367         select ARCH_MTD_XIP
 368         select GENERIC_GPIO
 369         help
 370           Support for StrongARM 11x0 based boards.
 371
 372 config ARCH_S3C2410
 373         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 374         select GENERIC_GPIO
 375         help
 376           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 377           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 378           the Samsung SMDK2410 development board (and derivatives).
 379
 380 config ARCH_SHARK
 381         bool "Shark"
 382         select ISA
 383         select ISA_DMA
 384         select PCI
 385         help
 386           Support for the StrongARM based Digital DNARD machine, also known
 387           as "Shark" (<http://www.shark-linux.de/shark.html>).
 388
 389 config ARCH_LH7A40X
 390         bool "Sharp LH7A40X"
 391         help
 392           Say Y here for systems based on one of the Sharp LH7A40X
 393           System on a Chip processors.  These CPUs include an ARM922T
 394           core with a wide array of integrated devices for
 395           hand-held and low-power applications.
 396
 397 config ARCH_DAVINCI
 398         bool "TI DaVinci"
 399         select GENERIC_TIME
 400         select GENERIC_CLOCKEVENTS
 401         select GENERIC_GPIO
 402         help
 403           Support for TI's DaVinci platform.
 404
 405 config ARCH_OMAP
 406         bool "TI OMAP"
 407         select GENERIC_GPIO
 408         select GENERIC_TIME
 409         help
 410           Support for TI's OMAP platform (OMAP1 and OMAP2).
 411
 412 endchoice
 413
 414 source "arch/arm/mach-clps711x/Kconfig"
 415
 416 source "arch/arm/mach-ep93xx/Kconfig"
 417
 418 source "arch/arm/mach-footbridge/Kconfig"
 419
 420 source "arch/arm/mach-integrator/Kconfig"
 421
 422 source "arch/arm/mach-iop32x/Kconfig"
 423
 424 source "arch/arm/mach-iop33x/Kconfig"
 425
 426 source "arch/arm/mach-iop13xx/Kconfig"
 427
 428 source "arch/arm/mach-ixp4xx/Kconfig"
 429
 430 source "arch/arm/mach-ixp2000/Kconfig"
 431
 432 source "arch/arm/mach-ixp23xx/Kconfig"
 433
 434 source "arch/arm/mach-pxa/Kconfig"
 435
 436 source "arch/arm/mach-sa1100/Kconfig"
 437
 438 source "arch/arm/plat-omap/Kconfig"
 439
 440 source "arch/arm/mach-omap1/Kconfig"
 441
 442 source "arch/arm/mach-omap2/Kconfig"
 443
 444 source "arch/arm/plat-s3c24xx/Kconfig"
 445 source "arch/arm/plat-s3c/Kconfig"
 446
 447 if ARCH_S3C2410
 448 source "arch/arm/mach-s3c2400/Kconfig"
 449 source "arch/arm/mach-s3c2410/Kconfig"
 450 source "arch/arm/mach-s3c2412/Kconfig"
 451 source "arch/arm/mach-s3c2440/Kconfig"
 452 source "arch/arm/mach-s3c2442/Kconfig"
 453 source "arch/arm/mach-s3c2443/Kconfig"
 454 endif
 455
 456 source "arch/arm/mach-lh7a40x/Kconfig"
 457
 458 source "arch/arm/mach-imx/Kconfig"
 459
 460 source "arch/arm/mach-h720x/Kconfig"
 461
 462 source "arch/arm/mach-versatile/Kconfig"
 463
 464 source "arch/arm/mach-aaec2000/Kconfig"
 465
 466 source "arch/arm/mach-realview/Kconfig"
 467
 468 source "arch/arm/mach-at91/Kconfig"
 469
 470 source "arch/arm/plat-mxc/Kconfig"
 471
 472 source "arch/arm/mach-netx/Kconfig"
 473
 474 source "arch/arm/mach-ns9xxx/Kconfig"
 475
 476 source "arch/arm/mach-davinci/Kconfig"
 477
 478 source "arch/arm/mach-ks8695/Kconfig"
 479
 480 # Definitions to make life easier
 481 config ARCH_ACORN
 482         bool
 483
 484 config PLAT_IOP
 485         bool
 486
 487 source arch/arm/mm/Kconfig
 488
 489 config IWMMXT
 490         bool "Enable iWMMXt support"
 491         depends on CPU_XSCALE || CPU_XSC3
 492         default y if PXA27x || PXA3xx
 493         help
 494           Enable support for iWMMXt context switching at run time if
 495           running on a CPU that supports it.
 496
 497 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 498 config XSCALE_PMU
 499         bool
 500         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 501         default y
 502
 503 if !MMU
 504 source "arch/arm/Kconfig-nommu"
 505 endif
 506
 507 endmenu
 508
 509 source "arch/arm/common/Kconfig"
 510
 511 config FORCE_MAX_ZONEORDER
 512         int
 513         depends on SA1111
 514         default "9"
 515
 516 menu "Bus support"
 517
 518 config ARM_AMBA
 519         bool
 520
 521 config ISA
 522         bool
 523         help
 524           Find out whether you have ISA slots on your motherboard.  ISA is the
 525           name of a bus system, i.e. the way the CPU talks to the other stuff
 526           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 527           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 528           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 529
 530 # Select ISA DMA controller support
 531 config ISA_DMA
 532         bool
 533         select ISA_DMA_API
 534
 535 # Select ISA DMA interface
 536 config ISA_DMA_API
 537         bool
 538
 539 config PCI
 540         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 541         help
 542           Find out whether you have a PCI motherboard. PCI is the name of a
 543           bus system, i.e. the way the CPU talks to the other stuff inside
 544           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 545           VESA. If you have PCI, say Y, otherwise N.
 546
 547           The PCI-HOWTO, available from
 548           <http://www.tldp.org/docs.html#howto>, contains valuable
 549           information about which PCI hardware does work under Linux and which
 550           doesn't.
 551
 552 config PCI_SYSCALL
 553         def_bool PCI
 554
 555 # Select the host bridge type
 556 config PCI_HOST_VIA82C505
 557         bool
 558         depends on PCI && ARCH_SHARK
 559         default y
 560
 561 config PCI_HOST_ITE8152
 562         bool
 563         depends on PCI && MACH_ARMCORE
 564         default y
 565         select DMABOUNCE
 566
 567 source "drivers/pci/Kconfig"
 568
 569 source "drivers/pcmcia/Kconfig"
 570
 571 endmenu
 572
 573 menu "Kernel Features"
 574
 575 source "kernel/time/Kconfig"
 576
 577 config SMP
 578         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 579         depends on EXPERIMENTAL && REALVIEW_MPCORE
 580         help
 581           This enables support for systems with more than one CPU. If you have
 582           a system with only one CPU, like most personal computers, say N. If
 583           you have a system with more than one CPU, say Y.
 584
 585           If you say N here, the kernel will run on single and multiprocessor
 586           machines, but will use only one CPU of a multiprocessor machine. If
 587           you say Y here, the kernel will run on many, but not all, single
 588           processor machines. On a single processor machine, the kernel will
 589           run faster if you say N here.
 590
 591           See also the <file:Documentation/smp.txt>,
 592           <file:Documentation/i386/IO-APIC.txt>,
 593           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 594           <http://www.linuxdoc.org/docs.html#howto>.
 595
 596           If you don't know what to do here, say N.
 597
 598 config NR_CPUS
 599         int "Maximum number of CPUs (2-32)"
 600         range 2 32
 601         depends on SMP
 602         default "4"
 603
 604 config HOTPLUG_CPU
 605         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 606         depends on SMP && HOTPLUG && EXPERIMENTAL
 607         help
 608           Say Y here to experiment with turning CPUs off and on.  CPUs
 609           can be controlled through /sys/devices/system/cpu.
 610
 611 config LOCAL_TIMERS
 612         bool "Use local timer interrupts"
 613         depends on SMP && REALVIEW_MPCORE
 614         default y
 615         help
 616           Enable support for local timers on SMP platforms, rather then the
 617           legacy IPI broadcast method.  Local timers allows the system
 618           accounting to be spread across the timer interval, preventing a
 619           "thundering herd" at every timer tick.
 620
 621 config PREEMPT
 622         bool "Preemptible Kernel (EXPERIMENTAL)"
 623         depends on EXPERIMENTAL
 624         help
 625           This option reduces the latency of the kernel when reacting to
 626           real-time or interactive events by allowing a low priority process to
 627           be preempted even if it is in kernel mode executing a system call.
 628           This allows applications to run more reliably even when the system is
 629           under load.
 630
 631           Say Y here if you are building a kernel for a desktop, embedded
 632           or real-time system.  Say N if you are unsure.
 633
 634 config NO_IDLE_HZ
 635         bool "Dynamic tick timer"
 636         depends on !GENERIC_CLOCKEVENTS
 637         help
 638           Select this option if you want to disable continuous timer ticks
 639           and have them programmed to occur as required. This option saves
 640           power as the system can remain in idle state for longer.
 641
 642           By default dynamic tick is disabled during the boot, and can be
 643           manually enabled with:
 644
 645             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 646
 647           Alternatively, if you want dynamic tick automatically enabled
 648           during boot, pass "dyntick=enable" via the kernel command string.
 649
 650           Please note that dynamic tick may affect the accuracy of
 651           timekeeping on some platforms depending on the implementation.
 652           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 653           to have accurate timekeeping with dynamic tick.
 654
 655 config HZ
 656         int
 657         default 128 if ARCH_L7200
 658         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 659         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 660         default 100
 661
 662 config AEABI
 663         bool "Use the ARM EABI to compile the kernel"
 664         help
 665           This option allows for the kernel to be compiled using the latest
 666           ARM ABI (aka EABI).  This is only useful if you are using a user
 667           space environment that is also compiled with EABI.
 668
 669           Since there are major incompatibilities between the legacy ABI and
 670           EABI, especially with regard to structure member alignment, this
 671           option also changes the kernel syscall calling convention to
 672           disambiguate both ABIs and allow for backward compatibility support
 673           (selected with CONFIG_OABI_COMPAT).
 674
 675           To use this you need GCC version 4.0.0 or later.
 676
 677 config OABI_COMPAT
 678         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 679         depends on AEABI && EXPERIMENTAL
 680         default y
 681         help
 682           This option preserves the old syscall interface along with the
 683           new (ARM EABI) one. It also provides a compatibility layer to
 684           intercept syscalls that have structure arguments which layout
 685           in memory differs between the legacy ABI and the new ARM EABI
 686           (only for non "thumb" binaries). This option adds a tiny
 687           overhead to all syscalls and produces a slightly larger kernel.
 688           If you know you'll be using only pure EABI user space then you
 689           can say N here. If this option is not selected and you attempt
 690           to execute a legacy ABI binary then the result will be
 691           UNPREDICTABLE (in fact it can be predicted that it won't work
 692           at all). If in doubt say Y.
 693
 694 config ARCH_DISCONTIGMEM_ENABLE
 695         bool
 696         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 697         help
 698           Say Y to support efficient handling of discontiguous physical memory,
 699           for architectures which are either NUMA (Non-Uniform Memory Access)
 700           or have huge holes in the physical address space for other reasons.
 701           See <file:Documentation/vm/numa> for more.
 702
 703 config NODES_SHIFT
 704         int
 705         default "4" if ARCH_LH7A40X
 706         default "2"
 707         depends on NEED_MULTIPLE_NODES
 708
 709 source "mm/Kconfig"
 710
 711 config LEDS
 712         bool "Timer and CPU usage LEDs"
 713         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 714                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 715                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 716                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 717                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 718                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 719                    ARCH_KS8695
 720         help
 721           If you say Y here, the LEDs on your machine will be used
 722           to provide useful information about your current system status.
 723
 724           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 725           be able to select which LEDs are active using the options below. If
 726           you are compiling a kernel for the EBSA-110 or the LART however, the
 727           red LED will simply flash regularly to indicate that the system is
 728           still functional. It is safe to say Y here if you have a CATS
 729           system, but the driver will do nothing.
 730
 731 config LEDS_TIMER
 732         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 733                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 734                             || MACH_OMAP_PERSEUS2
 735         depends on LEDS
 736         depends on !GENERIC_CLOCKEVENTS
 737         default y if ARCH_EBSA110
 738         help
 739           If you say Y here, one of the system LEDs (the green one on the
 740           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 741           will flash regularly to indicate that the system is still
 742           operational. This is mainly useful to kernel hackers who are
 743           debugging unstable kernels.
 744
 745           The LART uses the same LED for both Timer LED and CPU usage LED
 746           functions. You may choose to use both, but the Timer LED function
 747           will overrule the CPU usage LED.
 748
 749 config LEDS_CPU
 750         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 751                         !ARCH_OMAP) \
 752                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 753                         || MACH_OMAP_PERSEUS2
 754         depends on LEDS
 755         help
 756           If you say Y here, the red LED will be used to give a good real
 757           time indication of CPU usage, by lighting whenever the idle task
 758           is not currently executing.
 759
 760           The LART uses the same LED for both Timer LED and CPU usage LED
 761           functions. You may choose to use both, but the Timer LED function
 762           will overrule the CPU usage LED.
 763
 764 config ALIGNMENT_TRAP
 765         bool
 766         depends on CPU_CP15_MMU
 767         default y if !ARCH_EBSA110
 768         help
 769           ARM processors cannot fetch/store information which is not
 770           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 771           address divisible by 4. On 32-bit ARM processors, these non-aligned
 772           fetch/store instructions will be emulated in software if you say
 773           here, which has a severe performance impact. This is necessary for
 774           correct operation of some network protocols. With an IP-only
 775           configuration it is safe to say N, otherwise say Y.
 776
 777 endmenu
 778
 779 menu "Boot options"
 780
 781 # Compressed boot loader in ROM.  Yes, we really want to ask about
 782 # TEXT and BSS so we preserve their values in the config files.
 783 config ZBOOT_ROM_TEXT
 784         hex "Compressed ROM boot loader base address"
 785         default "0"
 786         help
 787           The physical address at which the ROM-able zImage is to be
 788           placed in the target.  Platforms which normally make use of
 789           ROM-able zImage formats normally set this to a suitable
 790           value in their defconfig file.
 791
 792           If ZBOOT_ROM is not enabled, this has no effect.
 793
 794 config ZBOOT_ROM_BSS
 795         hex "Compressed ROM boot loader BSS address"
 796         default "0"
 797         help
 798           The base address of an area of read/write memory in the target
 799           for the ROM-able zImage which must be available while the
 800           decompressor is running. It must be large enough to hold the
 801           entire decompressed kernel plus an additional 128 KiB.
 802           Platforms which normally make use of ROM-able zImage formats
 803           normally set this to a suitable value in their defconfig file.
 804
 805           If ZBOOT_ROM is not enabled, this has no effect.
 806
 807 config ZBOOT_ROM
 808         bool "Compressed boot loader in ROM/flash"
 809         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 810         help
 811           Say Y here if you intend to execute your compressed kernel image
 812           (zImage) directly from ROM or flash.  If unsure, say N.
 813
 814 config CMDLINE
 815         string "Default kernel command string"
 816         default ""
 817         help
 818           On some architectures (EBSA110 and CATS), there is currently no way
 819           for the boot loader to pass arguments to the kernel. For these
 820           architectures, you should supply some command-line options at build
 821           time by entering them here. As a minimum, you should specify the
 822           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 823
 824 config XIP_KERNEL
 825         bool "Kernel Execute-In-Place from ROM"
 826         depends on !ZBOOT_ROM
 827         help
 828           Execute-In-Place allows the kernel to run from non-volatile storage
 829           directly addressable by the CPU, such as NOR flash. This saves RAM
 830           space since the text section of the kernel is not loaded from flash
 831           to RAM.  Read-write sections, such as the data section and stack,
 832           are still copied to RAM.  The XIP kernel is not compressed since
 833           it has to run directly from flash, so it will take more space to
 834           store it.  The flash address used to link the kernel object files,
 835           and for storing it, is configuration dependent. Therefore, if you
 836           say Y here, you must know the proper physical address where to
 837           store the kernel image depending on your own flash memory usage.
 838
 839           Also note that the make target becomes "make xipImage" rather than
 840           "make zImage" or "make Image".  The final kernel binary to put in
 841           ROM memory will be arch/arm/boot/xipImage.
 842
 843           If unsure, say N.
 844
 845 config XIP_PHYS_ADDR
 846         hex "XIP Kernel Physical Location"
 847         depends on XIP_KERNEL
 848         default "0x00080000"
 849         help
 850           This is the physical address in your flash memory the kernel will
 851           be linked for and stored to.  This address is dependent on your
 852           own flash usage.
 853
 854 config KEXEC
 855         bool "Kexec system call (EXPERIMENTAL)"
 856         depends on EXPERIMENTAL
 857         help
 858           kexec is a system call that implements the ability to shutdown your
 859           current kernel, and to start another kernel.  It is like a reboot
 860           but it is independent of the system firmware.   And like a reboot
 861           you can start any kernel with it, not just Linux.
 862
 863           It is an ongoing process to be certain the hardware in a machine
 864           is properly shutdown, so do not be surprised if this code does not
 865           initially work for you.  It may help to enable device hotplugging
 866           support.
 867
 868 endmenu
 869
 870 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
 871
 872 menu "CPU Frequency scaling"
 873
 874 source "drivers/cpufreq/Kconfig"
 875
 876 config CPU_FREQ_SA1100
 877         bool
 878         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 879         default y
 880
 881 config CPU_FREQ_SA1110
 882         bool
 883         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 884         default y
 885
 886 config CPU_FREQ_INTEGRATOR
 887         tristate "CPUfreq driver for ARM Integrator CPUs"
 888         depends on ARCH_INTEGRATOR && CPU_FREQ
 889         default y
 890         help
 891           This enables the CPUfreq driver for ARM Integrator CPUs.
 892
 893           For details, take a look at <file:Documentation/cpu-freq>.
 894
 895           If in doubt, say Y.
 896
 897 config CPU_FREQ_IMX
 898         tristate "CPUfreq driver for i.MX CPUs"
 899         depends on ARCH_IMX && CPU_FREQ
 900         default n
 901         help
 902           This enables the CPUfreq driver for i.MX CPUs.
 903
 904           If in doubt, say N.
 905
 906 endmenu
 907
 908 endif
 909
 910 menu "Floating point emulation"
 911
 912 comment "At least one emulation must be selected"
 913
 914 config FPE_NWFPE
 915         bool "NWFPE math emulation"
 916         depends on !AEABI || OABI_COMPAT
 917         ---help---
 918           Say Y to include the NWFPE floating point emulator in the kernel.
 919           This is necessary to run most binaries. Linux does not currently
 920           support floating point hardware so you need to say Y here even if
 921           your machine has an FPA or floating point co-processor podule.
 922
 923           You may say N here if you are going to load the Acorn FPEmulator
 924           early in the bootup.
 925
 926 config FPE_NWFPE_XP
 927         bool "Support extended precision"
 928         depends on FPE_NWFPE
 929         help
 930           Say Y to include 80-bit support in the kernel floating-point
 931           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 932           Note that gcc does not generate 80-bit operations by default,
 933           so in most cases this option only enlarges the size of the
 934           floating point emulator without any good reason.
 935
 936           You almost surely want to say N here.
 937
 938 config FPE_FASTFPE
 939         bool "FastFPE math emulation (EXPERIMENTAL)"
 940         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 941         ---help---
 942           Say Y here to include the FAST floating point emulator in the kernel.
 943           This is an experimental much faster emulator which now also has full
 944           precision for the mantissa.  It does not support any exceptions.
 945           It is very simple, and approximately 3-6 times faster than NWFPE.
 946
 947           It should be sufficient for most programs.  It may be not suitable
 948           for scientific calculations, but you have to check this for yourself.
 949           If you do not feel you need a faster FP emulation you should better
 950           choose NWFPE.
 951
 952 config VFP
 953         bool "VFP-format floating point maths"
 954         depends on CPU_V6 || CPU_ARM926T
 955         help
 956           Say Y to include VFP support code in the kernel. This is needed
 957           if your hardware includes a VFP unit.
 958
 959           Please see <file:Documentation/arm/VFP/release-notes.txt> for
 960           release notes and additional status information.
 961
 962           Say N if your target does not have VFP hardware.
 963
 964 endmenu
 965
 966 menu "Userspace binary formats"
 967
 968 source "fs/Kconfig.binfmt"
 969
 970 config ARTHUR
 971         tristate "RISC OS personality"
 972         depends on !AEABI
 973         help
 974           Say Y here to include the kernel code necessary if you want to run
 975           Acorn RISC OS/Arthur binaries under Linux. This code is still very
 976           experimental; if this sounds frightening, say N and sleep in peace.
 977           You can also say M here to compile this support as a module (which
 978           will be called arthur).
 979
 980 endmenu
 981
 982 menu "Power management options"
 983
 984 source "kernel/power/Kconfig"
 985
 986 endmenu
 987
 988 source "net/Kconfig"
 989
 990 menu "Device Drivers"
 991
 992 source "drivers/base/Kconfig"
 993
 994 source "drivers/connector/Kconfig"
 995
 996 if ALIGNMENT_TRAP || !CPU_CP15_MMU
 997 source "drivers/mtd/Kconfig"
 998 endif
 999
1000 source "drivers/parport/Kconfig"
1001
1002 source "drivers/pnp/Kconfig"
1003
1004 source "drivers/block/Kconfig"
1005
1006 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1007
1008 source "drivers/misc/Kconfig"
1009
1010 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
1011         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
1012         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
1013         || ARCH_IXP23XX
1014 source "drivers/ide/Kconfig"
1015 endif
1016
1017 source "drivers/scsi/Kconfig"
1018
1019 source "drivers/ata/Kconfig"
1020
1021 source "drivers/md/Kconfig"
1022
1023 source "drivers/message/fusion/Kconfig"
1024
1025 source "drivers/ieee1394/Kconfig"
1026
1027 source "drivers/message/i2o/Kconfig"
1028
1029 source "drivers/net/Kconfig"
1030
1031 source "drivers/isdn/Kconfig"
1032
1033 # input before char - char/joystick depends on it. As does USB.
1034
1035 source "drivers/input/Kconfig"
1036
1037 source "drivers/char/Kconfig"
1038
1039 source "drivers/i2c/Kconfig"
1040
1041 source "drivers/spi/Kconfig"
1042
1043 source "drivers/w1/Kconfig"
1044
1045 source "drivers/power/Kconfig"
1046
1047 source "drivers/hwmon/Kconfig"
1048
1049 source "drivers/watchdog/Kconfig"
1050
1051 source "drivers/ssb/Kconfig"
1052
1053 #source "drivers/l3/Kconfig"
1054
1055 source "drivers/mfd/Kconfig"
1056
1057 source "drivers/media/Kconfig"
1058
1059 source "drivers/video/Kconfig"
1060
1061 source "sound/Kconfig"
1062
1063 source "drivers/hid/Kconfig"
1064
1065 source "drivers/usb/Kconfig"
1066
1067 source "drivers/mmc/Kconfig"
1068
1069 source "drivers/leds/Kconfig"
1070
1071 source "drivers/rtc/Kconfig"
1072
1073 source "drivers/dma/Kconfig"
1074
1075 source "drivers/dca/Kconfig"
1076
1077 endmenu
1078
1079 source "fs/Kconfig"
1080
1081 source "arch/arm/Kconfig.instrumentation"
1082
1083 source "arch/arm/Kconfig.debug"
1084
1085 source "security/Kconfig"
1086
1087 source "crypto/Kconfig"
1088
1089 source "lib/Kconfig"