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