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 HAVE_IDE
  12         select RTC_LIB
  13         select SYS_SUPPORTS_APM_EMULATION
  14         select HAVE_OPROFILE
  15         select HAVE_ARCH_KGDB
  16         select HAVE_KPROBES if (!XIP_KERNEL)
  17         select HAVE_KRETPROBES if (HAVE_KPROBES)
  18         select HAVE_FTRACE if (!XIP_KERNEL)
  19         select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
  20         select HAVE_GENERIC_DMA_COHERENT
  21         help
  22           The ARM series is a line of low-power-consumption RISC chip designs
  23           licensed by ARM Ltd and targeted at embedded applications and
  24           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  25           manufactured, but legacy ARM-based PC hardware remains popular in
  26           Europe.  There is an ARM Linux project with a web page at
  27           <http://www.arm.linux.org.uk/>.
  28
  29 config HAVE_PWM
  30         bool
  31
  32 config SYS_SUPPORTS_APM_EMULATION
  33         bool
  34
  35 config GENERIC_GPIO
  36         bool
  37         default n
  38
  39 config GENERIC_TIME
  40         bool
  41         default n
  42
  43 config GENERIC_CLOCKEVENTS
  44         bool
  45         default n
  46
  47 config GENERIC_CLOCKEVENTS_BROADCAST
  48         bool
  49         depends on GENERIC_CLOCKEVENTS
  50         default y if SMP && !LOCAL_TIMERS
  51
  52 config MMU
  53         bool
  54         default y
  55
  56 config NO_IOPORT
  57         bool
  58         default n
  59
  60 config EISA
  61         bool
  62         ---help---
  63           The Extended Industry Standard Architecture (EISA) bus was
  64           developed as an open alternative to the IBM MicroChannel bus.
  65
  66           The EISA bus provided some of the features of the IBM MicroChannel
  67           bus while maintaining backward compatibility with cards made for
  68           the older ISA bus.  The EISA bus saw limited use between 1988 and
  69           1995 when it was made obsolete by the PCI bus.
  70
  71           Say Y here if you are building a kernel for an EISA-based machine.
  72
  73           Otherwise, say N.
  74
  75 config SBUS
  76         bool
  77
  78 config MCA
  79         bool
  80         help
  81           MicroChannel Architecture is found in some IBM PS/2 machines and
  82           laptops.  It is a bus system similar to PCI or ISA. See
  83           <file:Documentation/mca.txt> (and especially the web page given
  84           there) before attempting to build an MCA bus kernel.
  85
  86 config GENERIC_HARDIRQS
  87         bool
  88         default y
  89
  90 config STACKTRACE_SUPPORT
  91         bool
  92         default y
  93
  94 config HAVE_LATENCYTOP_SUPPORT
  95         bool
  96         depends on !SMP
  97         default y
  98
  99 config LOCKDEP_SUPPORT
 100         bool
 101         default y
 102
 103 config TRACE_IRQFLAGS_SUPPORT
 104         bool
 105         default y
 106
 107 config HARDIRQS_SW_RESEND
 108         bool
 109         default y
 110
 111 config GENERIC_IRQ_PROBE
 112         bool
 113         default y
 114
 115 config GENERIC_LOCKBREAK
 116         bool
 117         default y
 118         depends on SMP && PREEMPT
 119
 120 config RWSEM_GENERIC_SPINLOCK
 121         bool
 122         default y
 123
 124 config RWSEM_XCHGADD_ALGORITHM
 125         bool
 126
 127 config ARCH_HAS_ILOG2_U32
 128         bool
 129         default n
 130
 131 config ARCH_HAS_ILOG2_U64
 132         bool
 133         default n
 134
 135 config GENERIC_HWEIGHT
 136         bool
 137         default y
 138
 139 config GENERIC_CALIBRATE_DELAY
 140         bool
 141         default y
 142
 143 config ARCH_MAY_HAVE_PC_FDC
 144         bool
 145
 146 config ZONE_DMA
 147         bool
 148         default y
 149
 150 config GENERIC_ISA_DMA
 151         bool
 152
 153 config FIQ
 154         bool
 155
 156 config ARCH_MTD_XIP
 157         bool
 158
 159 config GENERIC_HARDIRQS_NO__DO_IRQ
 160         bool
 161         def_bool y
 162
 163 if OPROFILE
 164
 165 config OPROFILE_ARMV6
 166         def_bool y
 167         depends on CPU_V6 && !SMP
 168         select OPROFILE_ARM11_CORE
 169
 170 config OPROFILE_MPCORE
 171         def_bool y
 172         depends on CPU_V6 && SMP
 173         select OPROFILE_ARM11_CORE
 174
 175 config OPROFILE_ARM11_CORE
 176         bool
 177
 178 endif
 179
 180 config VECTORS_BASE
 181         hex
 182         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 183         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 184         default 0x00000000
 185         help
 186           The base address of exception vectors.
 187
 188 source "init/Kconfig"
 189
 190 menu "System Type"
 191
 192 choice
 193         prompt "ARM system type"
 194         default ARCH_VERSATILE
 195
 196 config ARCH_AAEC2000
 197         bool "Agilent AAEC-2000 based"
 198         select ARM_AMBA
 199         select HAVE_CLK
 200         help
 201           This enables support for systems based on the Agilent AAEC-2000
 202
 203 config ARCH_INTEGRATOR
 204         bool "ARM Ltd. Integrator family"
 205         select ARM_AMBA
 206         select HAVE_CLK
 207         select ICST525
 208         help
 209           Support for ARM's Integrator platform.
 210
 211 config ARCH_REALVIEW
 212         bool "ARM Ltd. RealView family"
 213         select ARM_AMBA
 214         select HAVE_CLK
 215         select ICST307
 216         select GENERIC_TIME
 217         select GENERIC_CLOCKEVENTS
 218         help
 219           This enables support for ARM Ltd RealView boards.
 220
 221 config ARCH_VERSATILE
 222         bool "ARM Ltd. Versatile family"
 223         select ARM_AMBA
 224         select ARM_VIC
 225         select HAVE_CLK
 226         select ICST307
 227         select GENERIC_TIME
 228         select GENERIC_CLOCKEVENTS
 229         help
 230           This enables support for ARM Ltd Versatile board.
 231
 232 config ARCH_AT91
 233         bool "Atmel AT91"
 234         select GENERIC_GPIO
 235         select HAVE_CLK
 236         help
 237           This enables support for systems based on the Atmel AT91RM9200,
 238           AT91SAM9 and AT91CAP9 processors.
 239
 240 config ARCH_CLPS7500
 241         bool "Cirrus CL-PS7500FE"
 242         select TIMER_ACORN
 243         select ISA
 244         select NO_IOPORT
 245         help
 246           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 247
 248 config ARCH_CLPS711X
 249         bool "Cirrus Logic CLPS711x/EP721x-based"
 250         help
 251           Support for Cirrus Logic 711x/721x based boards.
 252
 253 config ARCH_EBSA110
 254         bool "EBSA-110"
 255         select ISA
 256         select NO_IOPORT
 257         help
 258           This is an evaluation board for the StrongARM processor available
 259           from Digital. It has limited hardware on-board, including an
 260           Ethernet interface, two PCMCIA sockets, two serial ports and a
 261           parallel port.
 262
 263 config ARCH_EP93XX
 264         bool "EP93xx-based"
 265         select ARM_AMBA
 266         select ARM_VIC
 267         select GENERIC_GPIO
 268         select HAVE_CLK
 269         select ARCH_REQUIRE_GPIOLIB
 270         help
 271           This enables support for the Cirrus EP93xx series of CPUs.
 272
 273 config ARCH_FOOTBRIDGE
 274         bool "FootBridge"
 275         select FOOTBRIDGE
 276         help
 277           Support for systems based on the DC21285 companion chip
 278           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 279
 280 config ARCH_NETX
 281         bool "Hilscher NetX based"
 282         select ARM_VIC
 283         help
 284           This enables support for systems based on the Hilscher NetX Soc
 285
 286 config ARCH_H720X
 287         bool "Hynix HMS720x-based"
 288         select ISA_DMA_API
 289         help
 290           This enables support for systems based on the Hynix HMS720x
 291
 292 config ARCH_IMX
 293         bool "IMX"
 294         select GENERIC_GPIO
 295         select GENERIC_TIME
 296         select GENERIC_CLOCKEVENTS
 297         help
 298           Support for Motorola's i.MX family of processors (MX1, MXL).
 299
 300 config ARCH_IOP13XX
 301         bool "IOP13xx-based"
 302         depends on MMU
 303         select PLAT_IOP
 304         select PCI
 305         select ARCH_SUPPORTS_MSI
 306         help
 307           Support for Intel's IOP13XX (XScale) family of processors.
 308
 309 config ARCH_IOP32X
 310         bool "IOP32x-based"
 311         depends on MMU
 312         select PLAT_IOP
 313         select PCI
 314         select GENERIC_GPIO
 315         select ARCH_REQUIRE_GPIOLIB
 316         help
 317           Support for Intel's 80219 and IOP32X (XScale) family of
 318           processors.
 319
 320 config ARCH_IOP33X
 321         bool "IOP33x-based"
 322         depends on MMU
 323         select PLAT_IOP
 324         select PCI
 325         select GENERIC_GPIO
 326         select ARCH_REQUIRE_GPIOLIB
 327         help
 328           Support for Intel's IOP33X (XScale) family of processors.
 329
 330 config ARCH_IXP23XX
 331         bool "IXP23XX-based"
 332         depends on MMU
 333         select PCI
 334         help
 335           Support for Intel's IXP23xx (XScale) family of processors.
 336
 337 config ARCH_IXP2000
 338         bool "IXP2400/2800-based"
 339         depends on MMU
 340         select PCI
 341         help
 342           Support for Intel's IXP2400/2800 (XScale) family of processors.
 343
 344 config ARCH_IXP4XX
 345         bool "IXP4xx-based"
 346         depends on MMU
 347         select GENERIC_GPIO
 348         select GENERIC_TIME
 349         select GENERIC_CLOCKEVENTS
 350         help
 351           Support for Intel's IXP4XX (XScale) family of processors.
 352
 353 config ARCH_L7200
 354         bool "LinkUp-L7200"
 355         select FIQ
 356         help
 357           Say Y here if you intend to run this kernel on a LinkUp Systems
 358           L7200 Software Development Board which uses an ARM720T processor.
 359           Information on this board can be obtained at:
 360
 361           <http://www.linkupsys.com/>
 362
 363           If you have any questions or comments about the Linux kernel port
 364           to this board, send e-mail to <sjhill@cotw.com>.
 365
 366 config ARCH_KIRKWOOD
 367         bool "Marvell Kirkwood"
 368         select PCI
 369         select GENERIC_TIME
 370         select GENERIC_CLOCKEVENTS
 371         select PLAT_ORION
 372         help
 373           Support for the following Marvell Kirkwood series SoCs:
 374           88F6180, 88F6192 and 88F6281.
 375
 376 config ARCH_KS8695
 377         bool "Micrel/Kendin KS8695"
 378         select GENERIC_GPIO
 379         help
 380           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 381           System-on-Chip devices.
 382
 383 config ARCH_NS9XXX
 384         bool "NetSilicon NS9xxx"
 385         select GENERIC_GPIO
 386         select GENERIC_TIME
 387         select GENERIC_CLOCKEVENTS
 388         select HAVE_CLK
 389         help
 390           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 391           System.
 392
 393           <http://www.digi.com/products/microprocessors/index.jsp>
 394
 395 config ARCH_LOKI
 396         bool "Marvell Loki (88RC8480)"
 397         select GENERIC_TIME
 398         select GENERIC_CLOCKEVENTS
 399         select PLAT_ORION
 400         help
 401           Support for the Marvell Loki (88RC8480) SoC.
 402
 403 config ARCH_MV78XX0
 404         bool "Marvell MV78xx0"
 405         select PCI
 406         select GENERIC_TIME
 407         select GENERIC_CLOCKEVENTS
 408         select PLAT_ORION
 409         help
 410           Support for the following Marvell MV78xx0 series SoCs:
 411           MV781x0, MV782x0.
 412
 413 config ARCH_MXC
 414         bool "Freescale MXC/iMX-based"
 415         select GENERIC_TIME
 416         select GENERIC_CLOCKEVENTS
 417         select ARCH_MTD_XIP
 418         select GENERIC_GPIO
 419         select ARCH_REQUIRE_GPIOLIB
 420         help
 421           Support for Freescale MXC/iMX-based family of processors
 422
 423 config ARCH_ORION5X
 424         bool "Marvell Orion"
 425         depends on MMU
 426         select PCI
 427         select GENERIC_GPIO
 428         select GENERIC_TIME
 429         select GENERIC_CLOCKEVENTS
 430         select PLAT_ORION
 431         help
 432           Support for the following Marvell Orion 5x series SoCs:
 433           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 434           Orion-2 (5281).
 435
 436 config ARCH_PNX4008
 437         bool "Philips Nexperia PNX4008 Mobile"
 438         select HAVE_CLK
 439         help
 440           This enables support for Philips PNX4008 mobile platform.
 441
 442 config ARCH_PXA
 443         bool "PXA2xx/PXA3xx-based"
 444         depends on MMU
 445         select ARCH_MTD_XIP
 446         select GENERIC_GPIO
 447         select HAVE_CLK
 448         select ARCH_REQUIRE_GPIOLIB
 449         select GENERIC_TIME
 450         select GENERIC_CLOCKEVENTS
 451         select TICK_ONESHOT
 452         help
 453           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 454
 455 config ARCH_RPC
 456         bool "RiscPC"
 457         select ARCH_ACORN
 458         select FIQ
 459         select TIMER_ACORN
 460         select ARCH_MAY_HAVE_PC_FDC
 461         select HAVE_PATA_PLATFORM
 462         select ISA_DMA_API
 463         select NO_IOPORT
 464         help
 465           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 466           CD-ROM interface, serial and parallel port, and the floppy drive.
 467
 468 config ARCH_SA1100
 469         bool "SA1100-based"
 470         select ISA
 471         select ARCH_DISCONTIGMEM_ENABLE
 472         select ARCH_SPARSEMEM_ENABLE
 473         select ARCH_SELECT_MEMORY_MODEL
 474         select ARCH_MTD_XIP
 475         select GENERIC_GPIO
 476         select GENERIC_TIME
 477         select GENERIC_CLOCKEVENTS
 478         select HAVE_CLK
 479         select TICK_ONESHOT
 480         select ARCH_REQUIRE_GPIOLIB
 481         help
 482           Support for StrongARM 11x0 based boards.
 483
 484 config ARCH_S3C2410
 485         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 486         select GENERIC_GPIO
 487         select HAVE_CLK
 488         help
 489           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 490           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 491           the Samsung SMDK2410 development board (and derivatives).
 492
 493 config ARCH_SHARK
 494         bool "Shark"
 495         select ISA
 496         select ISA_DMA
 497         select PCI
 498         help
 499           Support for the StrongARM based Digital DNARD machine, also known
 500           as "Shark" (<http://www.shark-linux.de/shark.html>).
 501
 502 config ARCH_LH7A40X
 503         bool "Sharp LH7A40X"
 504         help
 505           Say Y here for systems based on one of the Sharp LH7A40X
 506           System on a Chip processors.  These CPUs include an ARM922T
 507           core with a wide array of integrated devices for
 508           hand-held and low-power applications.
 509
 510 config ARCH_DAVINCI
 511         bool "TI DaVinci"
 512         select GENERIC_TIME
 513         select GENERIC_CLOCKEVENTS
 514         select GENERIC_GPIO
 515         select HAVE_CLK
 516         help
 517           Support for TI's DaVinci platform.
 518
 519 config ARCH_OMAP
 520         bool "TI OMAP"
 521         select GENERIC_GPIO
 522         select HAVE_CLK
 523         select ARCH_REQUIRE_GPIOLIB
 524         select GENERIC_TIME
 525         select GENERIC_CLOCKEVENTS
 526         help
 527           Support for TI's OMAP platform (OMAP1 and OMAP2).
 528
 529 config ARCH_MSM7X00A
 530         bool "Qualcomm MSM7X00A"
 531         select GENERIC_TIME
 532         select GENERIC_CLOCKEVENTS
 533         help
 534           Support for Qualcomm MSM7X00A based systems.  This runs on the ARM11
 535           apps processor of the MSM7X00A and depends on a shared memory
 536           interface to the ARM9 modem processor which runs the baseband stack
 537           and controls some vital subsystems (clock and power control, etc).
 538           <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
 539
 540 endchoice
 541
 542 source "arch/arm/mach-clps711x/Kconfig"
 543
 544 source "arch/arm/mach-ep93xx/Kconfig"
 545
 546 source "arch/arm/mach-footbridge/Kconfig"
 547
 548 source "arch/arm/mach-integrator/Kconfig"
 549
 550 source "arch/arm/mach-iop32x/Kconfig"
 551
 552 source "arch/arm/mach-iop33x/Kconfig"
 553
 554 source "arch/arm/mach-iop13xx/Kconfig"
 555
 556 source "arch/arm/mach-ixp4xx/Kconfig"
 557
 558 source "arch/arm/mach-ixp2000/Kconfig"
 559
 560 source "arch/arm/mach-ixp23xx/Kconfig"
 561
 562 source "arch/arm/mach-loki/Kconfig"
 563
 564 source "arch/arm/mach-mv78xx0/Kconfig"
 565
 566 source "arch/arm/mach-pxa/Kconfig"
 567
 568 source "arch/arm/mach-sa1100/Kconfig"
 569
 570 source "arch/arm/plat-omap/Kconfig"
 571
 572 source "arch/arm/mach-omap1/Kconfig"
 573
 574 source "arch/arm/mach-omap2/Kconfig"
 575
 576 source "arch/arm/mach-orion5x/Kconfig"
 577
 578 source "arch/arm/mach-kirkwood/Kconfig"
 579
 580 source "arch/arm/plat-s3c24xx/Kconfig"
 581 source "arch/arm/plat-s3c/Kconfig"
 582
 583 if ARCH_S3C2410
 584 source "arch/arm/mach-s3c2400/Kconfig"
 585 source "arch/arm/mach-s3c2410/Kconfig"
 586 source "arch/arm/mach-s3c2412/Kconfig"
 587 source "arch/arm/mach-s3c2440/Kconfig"
 588 source "arch/arm/mach-s3c2442/Kconfig"
 589 source "arch/arm/mach-s3c2443/Kconfig"
 590 endif
 591
 592 source "arch/arm/mach-lh7a40x/Kconfig"
 593
 594 source "arch/arm/mach-imx/Kconfig"
 595
 596 source "arch/arm/mach-h720x/Kconfig"
 597
 598 source "arch/arm/mach-versatile/Kconfig"
 599
 600 source "arch/arm/mach-aaec2000/Kconfig"
 601
 602 source "arch/arm/mach-realview/Kconfig"
 603
 604 source "arch/arm/mach-at91/Kconfig"
 605
 606 source "arch/arm/plat-mxc/Kconfig"
 607
 608 source "arch/arm/mach-netx/Kconfig"
 609
 610 source "arch/arm/mach-ns9xxx/Kconfig"
 611
 612 source "arch/arm/mach-davinci/Kconfig"
 613
 614 source "arch/arm/mach-ks8695/Kconfig"
 615
 616 source "arch/arm/mach-msm/Kconfig"
 617
 618 # Definitions to make life easier
 619 config ARCH_ACORN
 620         bool
 621
 622 config PLAT_IOP
 623         bool
 624
 625 config PLAT_ORION
 626         bool
 627
 628 source arch/arm/mm/Kconfig
 629
 630 config IWMMXT
 631         bool "Enable iWMMXt support"
 632         depends on CPU_XSCALE || CPU_XSC3
 633         default y if PXA27x || PXA3xx
 634         help
 635           Enable support for iWMMXt context switching at run time if
 636           running on a CPU that supports it.
 637
 638 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 639 config XSCALE_PMU
 640         bool
 641         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 642         default y
 643
 644 if !MMU
 645 source "arch/arm/Kconfig-nommu"
 646 endif
 647
 648 endmenu
 649
 650 source "arch/arm/common/Kconfig"
 651
 652 config FORCE_MAX_ZONEORDER
 653         int
 654         depends on SA1111
 655         default "9"
 656
 657 menu "Bus support"
 658
 659 config ARM_AMBA
 660         bool
 661
 662 config ISA
 663         bool
 664         help
 665           Find out whether you have ISA slots on your motherboard.  ISA is the
 666           name of a bus system, i.e. the way the CPU talks to the other stuff
 667           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 668           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 669           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 670
 671 # Select ISA DMA controller support
 672 config ISA_DMA
 673         bool
 674         select ISA_DMA_API
 675
 676 # Select ISA DMA interface
 677 config ISA_DMA_API
 678         bool
 679
 680 config PCI
 681         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 682         help
 683           Find out whether you have a PCI motherboard. PCI is the name of a
 684           bus system, i.e. the way the CPU talks to the other stuff inside
 685           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 686           VESA. If you have PCI, say Y, otherwise N.
 687
 688 config PCI_SYSCALL
 689         def_bool PCI
 690
 691 # Select the host bridge type
 692 config PCI_HOST_VIA82C505
 693         bool
 694         depends on PCI && ARCH_SHARK
 695         default y
 696
 697 config PCI_HOST_ITE8152
 698         bool
 699         depends on PCI && MACH_ARMCORE
 700         default y
 701         select DMABOUNCE
 702
 703 source "drivers/pci/Kconfig"
 704
 705 source "drivers/pcmcia/Kconfig"
 706
 707 endmenu
 708
 709 menu "Kernel Features"
 710
 711 source "kernel/time/Kconfig"
 712
 713 config SMP
 714         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 715         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 716         select USE_GENERIC_SMP_HELPERS
 717         help
 718           This enables support for systems with more than one CPU. If you have
 719           a system with only one CPU, like most personal computers, say N. If
 720           you have a system with more than one CPU, say Y.
 721
 722           If you say N here, the kernel will run on single and multiprocessor
 723           machines, but will use only one CPU of a multiprocessor machine. If
 724           you say Y here, the kernel will run on many, but not all, single
 725           processor machines. On a single processor machine, the kernel will
 726           run faster if you say N here.
 727
 728           See also <file:Documentation/i386/IO-APIC.txt>,
 729           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 730           <http://www.linuxdoc.org/docs.html#howto>.
 731
 732           If you don't know what to do here, say N.
 733
 734 config NR_CPUS
 735         int "Maximum number of CPUs (2-32)"
 736         range 2 32
 737         depends on SMP
 738         default "4"
 739
 740 config HOTPLUG_CPU
 741         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 742         depends on SMP && HOTPLUG && EXPERIMENTAL
 743         help
 744           Say Y here to experiment with turning CPUs off and on.  CPUs
 745           can be controlled through /sys/devices/system/cpu.
 746
 747 config LOCAL_TIMERS
 748         bool "Use local timer interrupts"
 749         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 750         default y
 751         help
 752           Enable support for local timers on SMP platforms, rather then the
 753           legacy IPI broadcast method.  Local timers allows the system
 754           accounting to be spread across the timer interval, preventing a
 755           "thundering herd" at every timer tick.
 756
 757 config PREEMPT
 758         bool "Preemptible Kernel (EXPERIMENTAL)"
 759         depends on EXPERIMENTAL
 760         help
 761           This option reduces the latency of the kernel when reacting to
 762           real-time or interactive events by allowing a low priority process to
 763           be preempted even if it is in kernel mode executing a system call.
 764           This allows applications to run more reliably even when the system is
 765           under load.
 766
 767           Say Y here if you are building a kernel for a desktop, embedded
 768           or real-time system.  Say N if you are unsure.
 769
 770 config HZ
 771         int
 772         default 128 if ARCH_L7200
 773         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 774         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 775         default AT91_TIMER_HZ if ARCH_AT91
 776         default 100
 777
 778 config AEABI
 779         bool "Use the ARM EABI to compile the kernel"
 780         help
 781           This option allows for the kernel to be compiled using the latest
 782           ARM ABI (aka EABI).  This is only useful if you are using a user
 783           space environment that is also compiled with EABI.
 784
 785           Since there are major incompatibilities between the legacy ABI and
 786           EABI, especially with regard to structure member alignment, this
 787           option also changes the kernel syscall calling convention to
 788           disambiguate both ABIs and allow for backward compatibility support
 789           (selected with CONFIG_OABI_COMPAT).
 790
 791           To use this you need GCC version 4.0.0 or later.
 792
 793 config OABI_COMPAT
 794         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 795         depends on AEABI && EXPERIMENTAL
 796         default y
 797         help
 798           This option preserves the old syscall interface along with the
 799           new (ARM EABI) one. It also provides a compatibility layer to
 800           intercept syscalls that have structure arguments which layout
 801           in memory differs between the legacy ABI and the new ARM EABI
 802           (only for non "thumb" binaries). This option adds a tiny
 803           overhead to all syscalls and produces a slightly larger kernel.
 804           If you know you'll be using only pure EABI user space then you
 805           can say N here. If this option is not selected and you attempt
 806           to execute a legacy ABI binary then the result will be
 807           UNPREDICTABLE (in fact it can be predicted that it won't work
 808           at all). If in doubt say Y.
 809
 810 config ARCH_FLATMEM_HAS_HOLES
 811         bool
 812         default y
 813         depends on FLATMEM
 814
 815 config ARCH_DISCONTIGMEM_ENABLE
 816         bool
 817         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 818         help
 819           Say Y to support efficient handling of discontiguous physical memory,
 820           for architectures which are either NUMA (Non-Uniform Memory Access)
 821           or have huge holes in the physical address space for other reasons.
 822           See <file:Documentation/vm/numa> for more.
 823
 824 config ARCH_SPARSEMEM_ENABLE
 825         bool
 826
 827 config ARCH_SELECT_MEMORY_MODEL
 828         bool
 829
 830 config NODES_SHIFT
 831         int
 832         default "4" if ARCH_LH7A40X
 833         default "2"
 834         depends on NEED_MULTIPLE_NODES
 835
 836 source "mm/Kconfig"
 837
 838 config LEDS
 839         bool "Timer and CPU usage LEDs"
 840         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
 841                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 842                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 843                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 844                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 845                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 846                    ARCH_KS8695 || MACH_RD88F5182
 847         help
 848           If you say Y here, the LEDs on your machine will be used
 849           to provide useful information about your current system status.
 850
 851           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 852           be able to select which LEDs are active using the options below. If
 853           you are compiling a kernel for the EBSA-110 or the LART however, the
 854           red LED will simply flash regularly to indicate that the system is
 855           still functional. It is safe to say Y here if you have a CATS
 856           system, but the driver will do nothing.
 857
 858 config LEDS_TIMER
 859         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 860                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 861                             || MACH_OMAP_PERSEUS2
 862         depends on LEDS
 863         depends on !GENERIC_CLOCKEVENTS
 864         default y if ARCH_EBSA110
 865         help
 866           If you say Y here, one of the system LEDs (the green one on the
 867           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 868           will flash regularly to indicate that the system is still
 869           operational. This is mainly useful to kernel hackers who are
 870           debugging unstable kernels.
 871
 872           The LART uses the same LED for both Timer LED and CPU usage LED
 873           functions. You may choose to use both, but the Timer LED function
 874           will overrule the CPU usage LED.
 875
 876 config LEDS_CPU
 877         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 878                         !ARCH_OMAP) \
 879                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 880                         || MACH_OMAP_PERSEUS2
 881         depends on LEDS
 882         help
 883           If you say Y here, the red LED will be used to give a good real
 884           time indication of CPU usage, by lighting whenever the idle task
 885           is not currently executing.
 886
 887           The LART uses the same LED for both Timer LED and CPU usage LED
 888           functions. You may choose to use both, but the Timer LED function
 889           will overrule the CPU usage LED.
 890
 891 config ALIGNMENT_TRAP
 892         bool
 893         depends on CPU_CP15_MMU
 894         default y if !ARCH_EBSA110
 895         help
 896           ARM processors cannot fetch/store information which is not
 897           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 898           address divisible by 4. On 32-bit ARM processors, these non-aligned
 899           fetch/store instructions will be emulated in software if you say
 900           here, which has a severe performance impact. This is necessary for
 901           correct operation of some network protocols. With an IP-only
 902           configuration it is safe to say N, otherwise say Y.
 903
 904 endmenu
 905
 906 menu "Boot options"
 907
 908 # Compressed boot loader in ROM.  Yes, we really want to ask about
 909 # TEXT and BSS so we preserve their values in the config files.
 910 config ZBOOT_ROM_TEXT
 911         hex "Compressed ROM boot loader base address"
 912         default "0"
 913         help
 914           The physical address at which the ROM-able zImage is to be
 915           placed in the target.  Platforms which normally make use of
 916           ROM-able zImage formats normally set this to a suitable
 917           value in their defconfig file.
 918
 919           If ZBOOT_ROM is not enabled, this has no effect.
 920
 921 config ZBOOT_ROM_BSS
 922         hex "Compressed ROM boot loader BSS address"
 923         default "0"
 924         help
 925           The base address of an area of read/write memory in the target
 926           for the ROM-able zImage which must be available while the
 927           decompressor is running. It must be large enough to hold the
 928           entire decompressed kernel plus an additional 128 KiB.
 929           Platforms which normally make use of ROM-able zImage formats
 930           normally set this to a suitable value in their defconfig file.
 931
 932           If ZBOOT_ROM is not enabled, this has no effect.
 933
 934 config ZBOOT_ROM
 935         bool "Compressed boot loader in ROM/flash"
 936         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 937         help
 938           Say Y here if you intend to execute your compressed kernel image
 939           (zImage) directly from ROM or flash.  If unsure, say N.
 940
 941 config CMDLINE
 942         string "Default kernel command string"
 943         default ""
 944         help
 945           On some architectures (EBSA110 and CATS), there is currently no way
 946           for the boot loader to pass arguments to the kernel. For these
 947           architectures, you should supply some command-line options at build
 948           time by entering them here. As a minimum, you should specify the
 949           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 950
 951 config XIP_KERNEL
 952         bool "Kernel Execute-In-Place from ROM"
 953         depends on !ZBOOT_ROM
 954         help
 955           Execute-In-Place allows the kernel to run from non-volatile storage
 956           directly addressable by the CPU, such as NOR flash. This saves RAM
 957           space since the text section of the kernel is not loaded from flash
 958           to RAM.  Read-write sections, such as the data section and stack,
 959           are still copied to RAM.  The XIP kernel is not compressed since
 960           it has to run directly from flash, so it will take more space to
 961           store it.  The flash address used to link the kernel object files,
 962           and for storing it, is configuration dependent. Therefore, if you
 963           say Y here, you must know the proper physical address where to
 964           store the kernel image depending on your own flash memory usage.
 965
 966           Also note that the make target becomes "make xipImage" rather than
 967           "make zImage" or "make Image".  The final kernel binary to put in
 968           ROM memory will be arch/arm/boot/xipImage.
 969
 970           If unsure, say N.
 971
 972 config XIP_PHYS_ADDR
 973         hex "XIP Kernel Physical Location"
 974         depends on XIP_KERNEL
 975         default "0x00080000"
 976         help
 977           This is the physical address in your flash memory the kernel will
 978           be linked for and stored to.  This address is dependent on your
 979           own flash usage.
 980
 981 config KEXEC
 982         bool "Kexec system call (EXPERIMENTAL)"
 983         depends on EXPERIMENTAL
 984         help
 985           kexec is a system call that implements the ability to shutdown your
 986           current kernel, and to start another kernel.  It is like a reboot
 987           but it is independent of the system firmware.   And like a reboot
 988           you can start any kernel with it, not just Linux.
 989
 990           It is an ongoing process to be certain the hardware in a machine
 991           is properly shutdown, so do not be surprised if this code does not
 992           initially work for you.  It may help to enable device hotplugging
 993           support.
 994
 995 config ATAGS_PROC
 996         bool "Export atags in procfs"
 997         depends on KEXEC
 998         default y
 999         help
1000           Should the atags used to boot the kernel be exported in an "atags"
1001           file in procfs. Useful with kexec.
1002
1003 endmenu
1004
1005 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1006
1007 menu "CPU Frequency scaling"
1008
1009 source "drivers/cpufreq/Kconfig"
1010
1011 config CPU_FREQ_SA1100
1012         bool
1013         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1014         default y
1015
1016 config CPU_FREQ_SA1110
1017         bool
1018         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1019         default y
1020
1021 config CPU_FREQ_INTEGRATOR
1022         tristate "CPUfreq driver for ARM Integrator CPUs"
1023         depends on ARCH_INTEGRATOR && CPU_FREQ
1024         default y
1025         help
1026           This enables the CPUfreq driver for ARM Integrator CPUs.
1027
1028           For details, take a look at <file:Documentation/cpu-freq>.
1029
1030           If in doubt, say Y.
1031
1032 config CPU_FREQ_IMX
1033         tristate "CPUfreq driver for i.MX CPUs"
1034         depends on ARCH_IMX && CPU_FREQ
1035         default n
1036         help
1037           This enables the CPUfreq driver for i.MX CPUs.
1038
1039           If in doubt, say N.
1040
1041 config CPU_FREQ_PXA
1042         bool
1043         depends on CPU_FREQ && ARCH_PXA && PXA25x
1044         default y
1045         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1046
1047 endmenu
1048
1049 endif
1050
1051 menu "Floating point emulation"
1052
1053 comment "At least one emulation must be selected"
1054
1055 config FPE_NWFPE
1056         bool "NWFPE math emulation"
1057         depends on !AEABI || OABI_COMPAT
1058         ---help---
1059           Say Y to include the NWFPE floating point emulator in the kernel.
1060           This is necessary to run most binaries. Linux does not currently
1061           support floating point hardware so you need to say Y here even if
1062           your machine has an FPA or floating point co-processor podule.
1063
1064           You may say N here if you are going to load the Acorn FPEmulator
1065           early in the bootup.
1066
1067 config FPE_NWFPE_XP
1068         bool "Support extended precision"
1069         depends on FPE_NWFPE
1070         help
1071           Say Y to include 80-bit support in the kernel floating-point
1072           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1073           Note that gcc does not generate 80-bit operations by default,
1074           so in most cases this option only enlarges the size of the
1075           floating point emulator without any good reason.
1076
1077           You almost surely want to say N here.
1078
1079 config FPE_FASTFPE
1080         bool "FastFPE math emulation (EXPERIMENTAL)"
1081         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1082         ---help---
1083           Say Y here to include the FAST floating point emulator in the kernel.
1084           This is an experimental much faster emulator which now also has full
1085           precision for the mantissa.  It does not support any exceptions.
1086           It is very simple, and approximately 3-6 times faster than NWFPE.
1087
1088           It should be sufficient for most programs.  It may be not suitable
1089           for scientific calculations, but you have to check this for yourself.
1090           If you do not feel you need a faster FP emulation you should better
1091           choose NWFPE.
1092
1093 config VFP
1094         bool "VFP-format floating point maths"
1095         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1096         help
1097           Say Y to include VFP support code in the kernel. This is needed
1098           if your hardware includes a VFP unit.
1099
1100           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1101           release notes and additional status information.
1102
1103           Say N if your target does not have VFP hardware.
1104
1105 config VFPv3
1106         bool
1107         depends on VFP
1108         default y if CPU_V7
1109
1110 config NEON
1111         bool "Advanced SIMD (NEON) Extension support"
1112         depends on VFPv3 && CPU_V7
1113         help
1114           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1115           Extension.
1116
1117 endmenu
1118
1119 menu "Userspace binary formats"
1120
1121 source "fs/Kconfig.binfmt"
1122
1123 config ARTHUR
1124         tristate "RISC OS personality"
1125         depends on !AEABI
1126         help
1127           Say Y here to include the kernel code necessary if you want to run
1128           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1129           experimental; if this sounds frightening, say N and sleep in peace.
1130           You can also say M here to compile this support as a module (which
1131           will be called arthur).
1132
1133 endmenu
1134
1135 menu "Power management options"
1136
1137 source "kernel/power/Kconfig"
1138
1139 config ARCH_SUSPEND_POSSIBLE
1140         def_bool y
1141
1142 endmenu
1143
1144 source "net/Kconfig"
1145
1146 menu "Device Drivers"
1147
1148 source "drivers/base/Kconfig"
1149
1150 source "drivers/connector/Kconfig"
1151
1152 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1153 source "drivers/mtd/Kconfig"
1154 endif
1155
1156 source "drivers/parport/Kconfig"
1157
1158 source "drivers/pnp/Kconfig"
1159
1160 source "drivers/block/Kconfig"
1161
1162 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1163
1164 source "drivers/misc/Kconfig"
1165
1166 source "drivers/ide/Kconfig"
1167
1168 source "drivers/scsi/Kconfig"
1169
1170 source "drivers/ata/Kconfig"
1171
1172 source "drivers/md/Kconfig"
1173
1174 source "drivers/message/fusion/Kconfig"
1175
1176 source "drivers/ieee1394/Kconfig"
1177
1178 source "drivers/message/i2o/Kconfig"
1179
1180 source "drivers/net/Kconfig"
1181
1182 source "drivers/isdn/Kconfig"
1183
1184 # input before char - char/joystick depends on it. As does USB.
1185
1186 source "drivers/input/Kconfig"
1187
1188 source "drivers/char/Kconfig"
1189
1190 source "drivers/i2c/Kconfig"
1191
1192 source "drivers/spi/Kconfig"
1193
1194 source "drivers/gpio/Kconfig"
1195
1196 source "drivers/w1/Kconfig"
1197
1198 source "drivers/power/Kconfig"
1199
1200 source "drivers/hwmon/Kconfig"
1201
1202 source "drivers/watchdog/Kconfig"
1203
1204 source "drivers/ssb/Kconfig"
1205
1206 #source "drivers/l3/Kconfig"
1207
1208 source "drivers/mfd/Kconfig"
1209
1210 source "drivers/media/Kconfig"
1211
1212 source "drivers/video/Kconfig"
1213
1214 source "sound/Kconfig"
1215
1216 source "drivers/hid/Kconfig"
1217
1218 source "drivers/usb/Kconfig"
1219
1220 source "drivers/mmc/Kconfig"
1221
1222 source "drivers/leds/Kconfig"
1223
1224 source "drivers/rtc/Kconfig"
1225
1226 source "drivers/dma/Kconfig"
1227
1228 source "drivers/dca/Kconfig"
1229
1230 source "drivers/regulator/Kconfig"
1231
1232 source "drivers/uio/Kconfig"
1233
1234 endmenu
1235
1236 source "fs/Kconfig"
1237
1238 source "arch/arm/Kconfig.debug"
1239
1240 source "security/Kconfig"
1241
1242 source "crypto/Kconfig"
1243
1244 source "lib/Kconfig"