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_AOUT
  12         select HAVE_IDE
  13         select RTC_LIB
  14         select SYS_SUPPORTS_APM_EMULATION
  15         select HAVE_OPROFILE
  16         select HAVE_ARCH_KGDB
  17         select HAVE_KPROBES if (!XIP_KERNEL)
  18         select HAVE_KRETPROBES if (HAVE_KPROBES)
  19         select HAVE_FTRACE if (!XIP_KERNEL)
  20         select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
  21         select HAVE_GENERIC_DMA_COHERENT
  22         help
  23           The ARM series is a line of low-power-consumption RISC chip designs
  24           licensed by ARM Ltd and targeted at embedded applications and
  25           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  26           manufactured, but legacy ARM-based PC hardware remains popular in
  27           Europe.  There is an ARM Linux project with a web page at
  28           <http://www.arm.linux.org.uk/>.
  29
  30 config HAVE_PWM
  31         bool
  32
  33 config SYS_SUPPORTS_APM_EMULATION
  34         bool
  35
  36 config GENERIC_GPIO
  37         bool
  38         default n
  39
  40 config GENERIC_TIME
  41         bool
  42         default n
  43
  44 config GENERIC_CLOCKEVENTS
  45         bool
  46         default n
  47
  48 config GENERIC_CLOCKEVENTS_BROADCAST
  49         bool
  50         depends on GENERIC_CLOCKEVENTS
  51         default y if SMP && !LOCAL_TIMERS
  52
  53 config MMU
  54         bool
  55         default y
  56
  57 config NO_IOPORT
  58         bool
  59         default n
  60
  61 config EISA
  62         bool
  63         ---help---
  64           The Extended Industry Standard Architecture (EISA) bus was
  65           developed as an open alternative to the IBM MicroChannel bus.
  66
  67           The EISA bus provided some of the features of the IBM MicroChannel
  68           bus while maintaining backward compatibility with cards made for
  69           the older ISA bus.  The EISA bus saw limited use between 1988 and
  70           1995 when it was made obsolete by the PCI bus.
  71
  72           Say Y here if you are building a kernel for an EISA-based machine.
  73
  74           Otherwise, say N.
  75
  76 config SBUS
  77         bool
  78
  79 config MCA
  80         bool
  81         help
  82           MicroChannel Architecture is found in some IBM PS/2 machines and
  83           laptops.  It is a bus system similar to PCI or ISA. See
  84           <file:Documentation/mca.txt> (and especially the web page given
  85           there) before attempting to build an MCA bus kernel.
  86
  87 config GENERIC_HARDIRQS
  88         bool
  89         default y
  90
  91 config STACKTRACE_SUPPORT
  92         bool
  93         default y
  94
  95 config HAVE_LATENCYTOP_SUPPORT
  96         bool
  97         depends on !SMP
  98         default y
  99
 100 config LOCKDEP_SUPPORT
 101         bool
 102         default y
 103
 104 config TRACE_IRQFLAGS_SUPPORT
 105         bool
 106         default y
 107
 108 config HARDIRQS_SW_RESEND
 109         bool
 110         default y
 111
 112 config GENERIC_IRQ_PROBE
 113         bool
 114         default y
 115
 116 config GENERIC_LOCKBREAK
 117         bool
 118         default y
 119         depends on SMP && PREEMPT
 120
 121 config RWSEM_GENERIC_SPINLOCK
 122         bool
 123         default y
 124
 125 config RWSEM_XCHGADD_ALGORITHM
 126         bool
 127
 128 config ARCH_HAS_ILOG2_U32
 129         bool
 130         default n
 131
 132 config ARCH_HAS_ILOG2_U64
 133         bool
 134         default n
 135
 136 config GENERIC_HWEIGHT
 137         bool
 138         default y
 139
 140 config GENERIC_CALIBRATE_DELAY
 141         bool
 142         default y
 143
 144 config ARCH_MAY_HAVE_PC_FDC
 145         bool
 146
 147 config ZONE_DMA
 148         bool
 149         default y
 150
 151 config GENERIC_ISA_DMA
 152         bool
 153
 154 config FIQ
 155         bool
 156
 157 config ARCH_MTD_XIP
 158         bool
 159
 160 config GENERIC_HARDIRQS_NO__DO_IRQ
 161         bool
 162         def_bool y
 163
 164 if OPROFILE
 165
 166 config OPROFILE_ARMV6
 167         def_bool y
 168         depends on CPU_V6 && !SMP
 169         select OPROFILE_ARM11_CORE
 170
 171 config OPROFILE_MPCORE
 172         def_bool y
 173         depends on CPU_V6 && SMP
 174         select OPROFILE_ARM11_CORE
 175
 176 config OPROFILE_ARM11_CORE
 177         bool
 178
 179 endif
 180
 181 config VECTORS_BASE
 182         hex
 183         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 184         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 185         default 0x00000000
 186         help
 187           The base address of exception vectors.
 188
 189 source "init/Kconfig"
 190
 191 menu "System Type"
 192
 193 choice
 194         prompt "ARM system type"
 195         default ARCH_VERSATILE
 196
 197 config ARCH_AAEC2000
 198         bool "Agilent AAEC-2000 based"
 199         select ARM_AMBA
 200         select HAVE_CLK
 201         help
 202           This enables support for systems based on the Agilent AAEC-2000
 203
 204 config ARCH_INTEGRATOR
 205         bool "ARM Ltd. Integrator family"
 206         select ARM_AMBA
 207         select HAVE_CLK
 208         select ICST525
 209         help
 210           Support for ARM's Integrator platform.
 211
 212 config ARCH_REALVIEW
 213         bool "ARM Ltd. RealView family"
 214         select ARM_AMBA
 215         select HAVE_CLK
 216         select ICST307
 217         select GENERIC_TIME
 218         select GENERIC_CLOCKEVENTS
 219         help
 220           This enables support for ARM Ltd RealView boards.
 221
 222 config ARCH_VERSATILE
 223         bool "ARM Ltd. Versatile family"
 224         select ARM_AMBA
 225         select ARM_VIC
 226         select HAVE_CLK
 227         select ICST307
 228         select GENERIC_TIME
 229         select GENERIC_CLOCKEVENTS
 230         help
 231           This enables support for ARM Ltd Versatile board.
 232
 233 config ARCH_AT91
 234         bool "Atmel AT91"
 235         select GENERIC_GPIO
 236         select HAVE_CLK
 237         help
 238           This enables support for systems based on the Atmel AT91RM9200,
 239           AT91SAM9 and AT91CAP9 processors.
 240
 241 config ARCH_CLPS7500
 242         bool "Cirrus CL-PS7500FE"
 243         select TIMER_ACORN
 244         select ISA
 245         select NO_IOPORT
 246         help
 247           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 248
 249 config ARCH_CLPS711X
 250         bool "Cirrus Logic CLPS711x/EP721x-based"
 251         help
 252           Support for Cirrus Logic 711x/721x based boards.
 253
 254 config ARCH_EBSA110
 255         bool "EBSA-110"
 256         select ISA
 257         select NO_IOPORT
 258         help
 259           This is an evaluation board for the StrongARM processor available
 260           from Digital. It has limited hardware on-board, including an
 261           Ethernet interface, two PCMCIA sockets, two serial ports and a
 262           parallel port.
 263
 264 config ARCH_EP93XX
 265         bool "EP93xx-based"
 266         select ARM_AMBA
 267         select ARM_VIC
 268         select GENERIC_GPIO
 269         select HAVE_CLK
 270         select ARCH_REQUIRE_GPIOLIB
 271         help
 272           This enables support for the Cirrus EP93xx series of CPUs.
 273
 274 config ARCH_FOOTBRIDGE
 275         bool "FootBridge"
 276         select FOOTBRIDGE
 277         help
 278           Support for systems based on the DC21285 companion chip
 279           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 280
 281 config ARCH_NETX
 282         bool "Hilscher NetX based"
 283         select ARM_VIC
 284         help
 285           This enables support for systems based on the Hilscher NetX Soc
 286
 287 config ARCH_H720X
 288         bool "Hynix HMS720x-based"
 289         select ISA_DMA_API
 290         help
 291           This enables support for systems based on the Hynix HMS720x
 292
 293 config ARCH_IMX
 294         bool "IMX"
 295         select GENERIC_GPIO
 296         select GENERIC_TIME
 297         select GENERIC_CLOCKEVENTS
 298         help
 299           Support for Motorola's i.MX family of processors (MX1, MXL).
 300
 301 config ARCH_IOP13XX
 302         bool "IOP13xx-based"
 303         depends on MMU
 304         select PLAT_IOP
 305         select PCI
 306         select ARCH_SUPPORTS_MSI
 307         help
 308           Support for Intel's IOP13XX (XScale) family of processors.
 309
 310 config ARCH_IOP32X
 311         bool "IOP32x-based"
 312         depends on MMU
 313         select PLAT_IOP
 314         select PCI
 315         select GENERIC_GPIO
 316         select ARCH_REQUIRE_GPIOLIB
 317         help
 318           Support for Intel's 80219 and IOP32X (XScale) family of
 319           processors.
 320
 321 config ARCH_IOP33X
 322         bool "IOP33x-based"
 323         depends on MMU
 324         select PLAT_IOP
 325         select PCI
 326         select GENERIC_GPIO
 327         select ARCH_REQUIRE_GPIOLIB
 328         help
 329           Support for Intel's IOP33X (XScale) family of processors.
 330
 331 config ARCH_IXP23XX
 332         bool "IXP23XX-based"
 333         depends on MMU
 334         select PCI
 335         help
 336           Support for Intel's IXP23xx (XScale) family of processors.
 337
 338 config ARCH_IXP2000
 339         bool "IXP2400/2800-based"
 340         depends on MMU
 341         select PCI
 342         help
 343           Support for Intel's IXP2400/2800 (XScale) family of processors.
 344
 345 config ARCH_IXP4XX
 346         bool "IXP4xx-based"
 347         depends on MMU
 348         select GENERIC_GPIO
 349         select GENERIC_TIME
 350         select GENERIC_CLOCKEVENTS
 351         help
 352           Support for Intel's IXP4XX (XScale) family of processors.
 353
 354 config ARCH_L7200
 355         bool "LinkUp-L7200"
 356         select FIQ
 357         help
 358           Say Y here if you intend to run this kernel on a LinkUp Systems
 359           L7200 Software Development Board which uses an ARM720T processor.
 360           Information on this board can be obtained at:
 361
 362           <http://www.linkupsys.com/>
 363
 364           If you have any questions or comments about the Linux kernel port
 365           to this board, send e-mail to <sjhill@cotw.com>.
 366
 367 config ARCH_KIRKWOOD
 368         bool "Marvell Kirkwood"
 369         select PCI
 370         select GENERIC_TIME
 371         select GENERIC_CLOCKEVENTS
 372         select PLAT_ORION
 373         help
 374           Support for the following Marvell Kirkwood series SoCs:
 375           88F6180, 88F6192 and 88F6281.
 376
 377 config ARCH_KS8695
 378         bool "Micrel/Kendin KS8695"
 379         select GENERIC_GPIO
 380         help
 381           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 382           System-on-Chip devices.
 383
 384 config ARCH_NS9XXX
 385         bool "NetSilicon NS9xxx"
 386         select GENERIC_GPIO
 387         select GENERIC_TIME
 388         select GENERIC_CLOCKEVENTS
 389         select HAVE_CLK
 390         help
 391           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 392           System.
 393
 394           <http://www.digi.com/products/microprocessors/index.jsp>
 395
 396 config ARCH_LOKI
 397         bool "Marvell Loki (88RC8480)"
 398         select GENERIC_TIME
 399         select GENERIC_CLOCKEVENTS
 400         select PLAT_ORION
 401         help
 402           Support for the Marvell Loki (88RC8480) SoC.
 403
 404 config ARCH_MV78XX0
 405         bool "Marvell MV78xx0"
 406         select PCI
 407         select GENERIC_TIME
 408         select GENERIC_CLOCKEVENTS
 409         select PLAT_ORION
 410         help
 411           Support for the following Marvell MV78xx0 series SoCs:
 412           MV781x0, MV782x0.
 413
 414 config ARCH_MXC
 415         bool "Freescale MXC/iMX-based"
 416         select GENERIC_TIME
 417         select GENERIC_CLOCKEVENTS
 418         select ARCH_MTD_XIP
 419         select GENERIC_GPIO
 420         select ARCH_REQUIRE_GPIOLIB
 421         help
 422           Support for Freescale MXC/iMX-based family of processors
 423
 424 config ARCH_ORION5X
 425         bool "Marvell Orion"
 426         depends on MMU
 427         select PCI
 428         select GENERIC_GPIO
 429         select GENERIC_TIME
 430         select GENERIC_CLOCKEVENTS
 431         select PLAT_ORION
 432         help
 433           Support for the following Marvell Orion 5x series SoCs:
 434           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 435           Orion-2 (5281).
 436
 437 config ARCH_PNX4008
 438         bool "Philips Nexperia PNX4008 Mobile"
 439         select HAVE_CLK
 440         help
 441           This enables support for Philips PNX4008 mobile platform.
 442
 443 config ARCH_PXA
 444         bool "PXA2xx/PXA3xx-based"
 445         depends on MMU
 446         select ARCH_MTD_XIP
 447         select GENERIC_GPIO
 448         select HAVE_CLK
 449         select ARCH_REQUIRE_GPIOLIB
 450         select GENERIC_TIME
 451         select GENERIC_CLOCKEVENTS
 452         select TICK_ONESHOT
 453         help
 454           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 455
 456 config ARCH_RPC
 457         bool "RiscPC"
 458         select ARCH_ACORN
 459         select FIQ
 460         select TIMER_ACORN
 461         select ARCH_MAY_HAVE_PC_FDC
 462         select HAVE_PATA_PLATFORM
 463         select ISA_DMA_API
 464         select NO_IOPORT
 465         help
 466           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 467           CD-ROM interface, serial and parallel port, and the floppy drive.
 468
 469 config ARCH_SA1100
 470         bool "SA1100-based"
 471         select ISA
 472         select ARCH_DISCONTIGMEM_ENABLE
 473         select ARCH_SPARSEMEM_ENABLE
 474         select ARCH_SELECT_MEMORY_MODEL
 475         select ARCH_MTD_XIP
 476         select GENERIC_GPIO
 477         select GENERIC_TIME
 478         select GENERIC_CLOCKEVENTS
 479         select HAVE_CLK
 480         select TICK_ONESHOT
 481         select ARCH_REQUIRE_GPIOLIB
 482         help
 483           Support for StrongARM 11x0 based boards.
 484
 485 config ARCH_S3C2410
 486         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 487         select GENERIC_GPIO
 488         select HAVE_CLK
 489         help
 490           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 491           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 492           the Samsung SMDK2410 development board (and derivatives).
 493
 494 config ARCH_SHARK
 495         bool "Shark"
 496         select ISA
 497         select ISA_DMA
 498         select PCI
 499         help
 500           Support for the StrongARM based Digital DNARD machine, also known
 501           as "Shark" (<http://www.shark-linux.de/shark.html>).
 502
 503 config ARCH_LH7A40X
 504         bool "Sharp LH7A40X"
 505         help
 506           Say Y here for systems based on one of the Sharp LH7A40X
 507           System on a Chip processors.  These CPUs include an ARM922T
 508           core with a wide array of integrated devices for
 509           hand-held and low-power applications.
 510
 511 config ARCH_DAVINCI
 512         bool "TI DaVinci"
 513         select GENERIC_TIME
 514         select GENERIC_CLOCKEVENTS
 515         select GENERIC_GPIO
 516         select HAVE_CLK
 517         help
 518           Support for TI's DaVinci platform.
 519
 520 config ARCH_OMAP
 521         bool "TI OMAP"
 522         select GENERIC_GPIO
 523         select HAVE_CLK
 524         select ARCH_REQUIRE_GPIOLIB
 525         select GENERIC_TIME
 526         select GENERIC_CLOCKEVENTS
 527         help
 528           Support for TI's OMAP platform (OMAP1 and OMAP2).
 529
 530 config ARCH_MSM7X00A
 531         bool "Qualcomm MSM7X00A"
 532         select GENERIC_TIME
 533         select GENERIC_CLOCKEVENTS
 534         help
 535           Support for Qualcomm MSM7X00A based systems.  This runs on the ARM11
 536           apps processor of the MSM7X00A and depends on a shared memory
 537           interface to the ARM9 modem processor which runs the baseband stack
 538           and controls some vital subsystems (clock and power control, etc).
 539           <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
 540
 541 endchoice
 542
 543 source "arch/arm/mach-clps711x/Kconfig"
 544
 545 source "arch/arm/mach-ep93xx/Kconfig"
 546
 547 source "arch/arm/mach-footbridge/Kconfig"
 548
 549 source "arch/arm/mach-integrator/Kconfig"
 550
 551 source "arch/arm/mach-iop32x/Kconfig"
 552
 553 source "arch/arm/mach-iop33x/Kconfig"
 554
 555 source "arch/arm/mach-iop13xx/Kconfig"
 556
 557 source "arch/arm/mach-ixp4xx/Kconfig"
 558
 559 source "arch/arm/mach-ixp2000/Kconfig"
 560
 561 source "arch/arm/mach-ixp23xx/Kconfig"
 562
 563 source "arch/arm/mach-loki/Kconfig"
 564
 565 source "arch/arm/mach-mv78xx0/Kconfig"
 566
 567 source "arch/arm/mach-pxa/Kconfig"
 568
 569 source "arch/arm/mach-sa1100/Kconfig"
 570
 571 source "arch/arm/plat-omap/Kconfig"
 572
 573 source "arch/arm/mach-omap1/Kconfig"
 574
 575 source "arch/arm/mach-omap2/Kconfig"
 576
 577 source "arch/arm/mach-orion5x/Kconfig"
 578
 579 source "arch/arm/mach-kirkwood/Kconfig"
 580
 581 source "arch/arm/plat-s3c24xx/Kconfig"
 582 source "arch/arm/plat-s3c/Kconfig"
 583
 584 if ARCH_S3C2410
 585 source "arch/arm/mach-s3c2400/Kconfig"
 586 source "arch/arm/mach-s3c2410/Kconfig"
 587 source "arch/arm/mach-s3c2412/Kconfig"
 588 source "arch/arm/mach-s3c2440/Kconfig"
 589 source "arch/arm/mach-s3c2442/Kconfig"
 590 source "arch/arm/mach-s3c2443/Kconfig"
 591 endif
 592
 593 source "arch/arm/mach-lh7a40x/Kconfig"
 594
 595 source "arch/arm/mach-imx/Kconfig"
 596
 597 source "arch/arm/mach-h720x/Kconfig"
 598
 599 source "arch/arm/mach-versatile/Kconfig"
 600
 601 source "arch/arm/mach-aaec2000/Kconfig"
 602
 603 source "arch/arm/mach-realview/Kconfig"
 604
 605 source "arch/arm/mach-at91/Kconfig"
 606
 607 source "arch/arm/plat-mxc/Kconfig"
 608
 609 source "arch/arm/mach-netx/Kconfig"
 610
 611 source "arch/arm/mach-ns9xxx/Kconfig"
 612
 613 source "arch/arm/mach-davinci/Kconfig"
 614
 615 source "arch/arm/mach-ks8695/Kconfig"
 616
 617 source "arch/arm/mach-msm/Kconfig"
 618
 619 # Definitions to make life easier
 620 config ARCH_ACORN
 621         bool
 622
 623 config PLAT_IOP
 624         bool
 625
 626 config PLAT_ORION
 627         bool
 628
 629 source arch/arm/mm/Kconfig
 630
 631 config IWMMXT
 632         bool "Enable iWMMXt support"
 633         depends on CPU_XSCALE || CPU_XSC3
 634         default y if PXA27x || PXA3xx
 635         help
 636           Enable support for iWMMXt context switching at run time if
 637           running on a CPU that supports it.
 638
 639 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 640 config XSCALE_PMU
 641         bool
 642         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 643         default y
 644
 645 if !MMU
 646 source "arch/arm/Kconfig-nommu"
 647 endif
 648
 649 endmenu
 650
 651 source "arch/arm/common/Kconfig"
 652
 653 config FORCE_MAX_ZONEORDER
 654         int
 655         depends on SA1111
 656         default "9"
 657
 658 menu "Bus support"
 659
 660 config ARM_AMBA
 661         bool
 662
 663 config ISA
 664         bool
 665         help
 666           Find out whether you have ISA slots on your motherboard.  ISA is the
 667           name of a bus system, i.e. the way the CPU talks to the other stuff
 668           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 669           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 670           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 671
 672 # Select ISA DMA controller support
 673 config ISA_DMA
 674         bool
 675         select ISA_DMA_API
 676
 677 # Select ISA DMA interface
 678 config ISA_DMA_API
 679         bool
 680
 681 config PCI
 682         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 683         help
 684           Find out whether you have a PCI motherboard. PCI is the name of a
 685           bus system, i.e. the way the CPU talks to the other stuff inside
 686           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 687           VESA. If you have PCI, say Y, otherwise N.
 688
 689 config PCI_SYSCALL
 690         def_bool PCI
 691
 692 # Select the host bridge type
 693 config PCI_HOST_VIA82C505
 694         bool
 695         depends on PCI && ARCH_SHARK
 696         default y
 697
 698 config PCI_HOST_ITE8152
 699         bool
 700         depends on PCI && MACH_ARMCORE
 701         default y
 702         select DMABOUNCE
 703
 704 source "drivers/pci/Kconfig"
 705
 706 source "drivers/pcmcia/Kconfig"
 707
 708 endmenu
 709
 710 menu "Kernel Features"
 711
 712 source "kernel/time/Kconfig"
 713
 714 config SMP
 715         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 716         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 717         select USE_GENERIC_SMP_HELPERS
 718         help
 719           This enables support for systems with more than one CPU. If you have
 720           a system with only one CPU, like most personal computers, say N. If
 721           you have a system with more than one CPU, say Y.
 722
 723           If you say N here, the kernel will run on single and multiprocessor
 724           machines, but will use only one CPU of a multiprocessor machine. If
 725           you say Y here, the kernel will run on many, but not all, single
 726           processor machines. On a single processor machine, the kernel will
 727           run faster if you say N here.
 728
 729           See also <file:Documentation/i386/IO-APIC.txt>,
 730           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 731           <http://www.linuxdoc.org/docs.html#howto>.
 732
 733           If you don't know what to do here, say N.
 734
 735 config NR_CPUS
 736         int "Maximum number of CPUs (2-32)"
 737         range 2 32
 738         depends on SMP
 739         default "4"
 740
 741 config HOTPLUG_CPU
 742         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 743         depends on SMP && HOTPLUG && EXPERIMENTAL
 744         help
 745           Say Y here to experiment with turning CPUs off and on.  CPUs
 746           can be controlled through /sys/devices/system/cpu.
 747
 748 config LOCAL_TIMERS
 749         bool "Use local timer interrupts"
 750         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 751         default y
 752         help
 753           Enable support for local timers on SMP platforms, rather then the
 754           legacy IPI broadcast method.  Local timers allows the system
 755           accounting to be spread across the timer interval, preventing a
 756           "thundering herd" at every timer tick.
 757
 758 config PREEMPT
 759         bool "Preemptible Kernel (EXPERIMENTAL)"
 760         depends on EXPERIMENTAL
 761         help
 762           This option reduces the latency of the kernel when reacting to
 763           real-time or interactive events by allowing a low priority process to
 764           be preempted even if it is in kernel mode executing a system call.
 765           This allows applications to run more reliably even when the system is
 766           under load.
 767
 768           Say Y here if you are building a kernel for a desktop, embedded
 769           or real-time system.  Say N if you are unsure.
 770
 771 config HZ
 772         int
 773         default 128 if ARCH_L7200
 774         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 775         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 776         default AT91_TIMER_HZ if ARCH_AT91
 777         default 100
 778
 779 config AEABI
 780         bool "Use the ARM EABI to compile the kernel"
 781         help
 782           This option allows for the kernel to be compiled using the latest
 783           ARM ABI (aka EABI).  This is only useful if you are using a user
 784           space environment that is also compiled with EABI.
 785
 786           Since there are major incompatibilities between the legacy ABI and
 787           EABI, especially with regard to structure member alignment, this
 788           option also changes the kernel syscall calling convention to
 789           disambiguate both ABIs and allow for backward compatibility support
 790           (selected with CONFIG_OABI_COMPAT).
 791
 792           To use this you need GCC version 4.0.0 or later.
 793
 794 config OABI_COMPAT
 795         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 796         depends on AEABI && EXPERIMENTAL
 797         default y
 798         help
 799           This option preserves the old syscall interface along with the
 800           new (ARM EABI) one. It also provides a compatibility layer to
 801           intercept syscalls that have structure arguments which layout
 802           in memory differs between the legacy ABI and the new ARM EABI
 803           (only for non "thumb" binaries). This option adds a tiny
 804           overhead to all syscalls and produces a slightly larger kernel.
 805           If you know you'll be using only pure EABI user space then you
 806           can say N here. If this option is not selected and you attempt
 807           to execute a legacy ABI binary then the result will be
 808           UNPREDICTABLE (in fact it can be predicted that it won't work
 809           at all). If in doubt say Y.
 810
 811 config ARCH_FLATMEM_HAS_HOLES
 812         bool
 813         default y
 814         depends on FLATMEM
 815
 816 config ARCH_DISCONTIGMEM_ENABLE
 817         bool
 818         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 819         help
 820           Say Y to support efficient handling of discontiguous physical memory,
 821           for architectures which are either NUMA (Non-Uniform Memory Access)
 822           or have huge holes in the physical address space for other reasons.
 823           See <file:Documentation/vm/numa> for more.
 824
 825 config ARCH_SPARSEMEM_ENABLE
 826         bool
 827
 828 config ARCH_SELECT_MEMORY_MODEL
 829         bool
 830
 831 config NODES_SHIFT
 832         int
 833         default "4" if ARCH_LH7A40X
 834         default "2"
 835         depends on NEED_MULTIPLE_NODES
 836
 837 source "mm/Kconfig"
 838
 839 config LEDS
 840         bool "Timer and CPU usage LEDs"
 841         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
 842                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 843                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 844                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 845                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 846                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 847                    ARCH_KS8695 || MACH_RD88F5182
 848         help
 849           If you say Y here, the LEDs on your machine will be used
 850           to provide useful information about your current system status.
 851
 852           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 853           be able to select which LEDs are active using the options below. If
 854           you are compiling a kernel for the EBSA-110 or the LART however, the
 855           red LED will simply flash regularly to indicate that the system is
 856           still functional. It is safe to say Y here if you have a CATS
 857           system, but the driver will do nothing.
 858
 859 config LEDS_TIMER
 860         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 861                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 862                             || MACH_OMAP_PERSEUS2
 863         depends on LEDS
 864         depends on !GENERIC_CLOCKEVENTS
 865         default y if ARCH_EBSA110
 866         help
 867           If you say Y here, one of the system LEDs (the green one on the
 868           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 869           will flash regularly to indicate that the system is still
 870           operational. This is mainly useful to kernel hackers who are
 871           debugging unstable kernels.
 872
 873           The LART uses the same LED for both Timer LED and CPU usage LED
 874           functions. You may choose to use both, but the Timer LED function
 875           will overrule the CPU usage LED.
 876
 877 config LEDS_CPU
 878         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 879                         !ARCH_OMAP) \
 880                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 881                         || MACH_OMAP_PERSEUS2
 882         depends on LEDS
 883         help
 884           If you say Y here, the red LED will be used to give a good real
 885           time indication of CPU usage, by lighting whenever the idle task
 886           is not currently executing.
 887
 888           The LART uses the same LED for both Timer LED and CPU usage LED
 889           functions. You may choose to use both, but the Timer LED function
 890           will overrule the CPU usage LED.
 891
 892 config ALIGNMENT_TRAP
 893         bool
 894         depends on CPU_CP15_MMU
 895         default y if !ARCH_EBSA110
 896         help
 897           ARM processors cannot fetch/store information which is not
 898           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 899           address divisible by 4. On 32-bit ARM processors, these non-aligned
 900           fetch/store instructions will be emulated in software if you say
 901           here, which has a severe performance impact. This is necessary for
 902           correct operation of some network protocols. With an IP-only
 903           configuration it is safe to say N, otherwise say Y.
 904
 905 endmenu
 906
 907 menu "Boot options"
 908
 909 # Compressed boot loader in ROM.  Yes, we really want to ask about
 910 # TEXT and BSS so we preserve their values in the config files.
 911 config ZBOOT_ROM_TEXT
 912         hex "Compressed ROM boot loader base address"
 913         default "0"
 914         help
 915           The physical address at which the ROM-able zImage is to be
 916           placed in the target.  Platforms which normally make use of
 917           ROM-able zImage formats normally set this to a suitable
 918           value in their defconfig file.
 919
 920           If ZBOOT_ROM is not enabled, this has no effect.
 921
 922 config ZBOOT_ROM_BSS
 923         hex "Compressed ROM boot loader BSS address"
 924         default "0"
 925         help
 926           The base address of an area of read/write memory in the target
 927           for the ROM-able zImage which must be available while the
 928           decompressor is running. It must be large enough to hold the
 929           entire decompressed kernel plus an additional 128 KiB.
 930           Platforms which normally make use of ROM-able zImage formats
 931           normally set this to a suitable value in their defconfig file.
 932
 933           If ZBOOT_ROM is not enabled, this has no effect.
 934
 935 config ZBOOT_ROM
 936         bool "Compressed boot loader in ROM/flash"
 937         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 938         help
 939           Say Y here if you intend to execute your compressed kernel image
 940           (zImage) directly from ROM or flash.  If unsure, say N.
 941
 942 config CMDLINE
 943         string "Default kernel command string"
 944         default ""
 945         help
 946           On some architectures (EBSA110 and CATS), there is currently no way
 947           for the boot loader to pass arguments to the kernel. For these
 948           architectures, you should supply some command-line options at build
 949           time by entering them here. As a minimum, you should specify the
 950           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 951
 952 config XIP_KERNEL
 953         bool "Kernel Execute-In-Place from ROM"
 954         depends on !ZBOOT_ROM
 955         help
 956           Execute-In-Place allows the kernel to run from non-volatile storage
 957           directly addressable by the CPU, such as NOR flash. This saves RAM
 958           space since the text section of the kernel is not loaded from flash
 959           to RAM.  Read-write sections, such as the data section and stack,
 960           are still copied to RAM.  The XIP kernel is not compressed since
 961           it has to run directly from flash, so it will take more space to
 962           store it.  The flash address used to link the kernel object files,
 963           and for storing it, is configuration dependent. Therefore, if you
 964           say Y here, you must know the proper physical address where to
 965           store the kernel image depending on your own flash memory usage.
 966
 967           Also note that the make target becomes "make xipImage" rather than
 968           "make zImage" or "make Image".  The final kernel binary to put in
 969           ROM memory will be arch/arm/boot/xipImage.
 970
 971           If unsure, say N.
 972
 973 config XIP_PHYS_ADDR
 974         hex "XIP Kernel Physical Location"
 975         depends on XIP_KERNEL
 976         default "0x00080000"
 977         help
 978           This is the physical address in your flash memory the kernel will
 979           be linked for and stored to.  This address is dependent on your
 980           own flash usage.
 981
 982 config KEXEC
 983         bool "Kexec system call (EXPERIMENTAL)"
 984         depends on EXPERIMENTAL
 985         help
 986           kexec is a system call that implements the ability to shutdown your
 987           current kernel, and to start another kernel.  It is like a reboot
 988           but it is independent of the system firmware.   And like a reboot
 989           you can start any kernel with it, not just Linux.
 990
 991           It is an ongoing process to be certain the hardware in a machine
 992           is properly shutdown, so do not be surprised if this code does not
 993           initially work for you.  It may help to enable device hotplugging
 994           support.
 995
 996 config ATAGS_PROC
 997         bool "Export atags in procfs"
 998         depends on KEXEC
 999         default y
1000         help
1001           Should the atags used to boot the kernel be exported in an "atags"
1002           file in procfs. Useful with kexec.
1003
1004 endmenu
1005
1006 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1007
1008 menu "CPU Frequency scaling"
1009
1010 source "drivers/cpufreq/Kconfig"
1011
1012 config CPU_FREQ_SA1100
1013         bool
1014         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1015         default y
1016
1017 config CPU_FREQ_SA1110
1018         bool
1019         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1020         default y
1021
1022 config CPU_FREQ_INTEGRATOR
1023         tristate "CPUfreq driver for ARM Integrator CPUs"
1024         depends on ARCH_INTEGRATOR && CPU_FREQ
1025         default y
1026         help
1027           This enables the CPUfreq driver for ARM Integrator CPUs.
1028
1029           For details, take a look at <file:Documentation/cpu-freq>.
1030
1031           If in doubt, say Y.
1032
1033 config CPU_FREQ_IMX
1034         tristate "CPUfreq driver for i.MX CPUs"
1035         depends on ARCH_IMX && CPU_FREQ
1036         default n
1037         help
1038           This enables the CPUfreq driver for i.MX CPUs.
1039
1040           If in doubt, say N.
1041
1042 config CPU_FREQ_PXA
1043         bool
1044         depends on CPU_FREQ && ARCH_PXA && PXA25x
1045         default y
1046         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1047
1048 endmenu
1049
1050 endif
1051
1052 menu "Floating point emulation"
1053
1054 comment "At least one emulation must be selected"
1055
1056 config FPE_NWFPE
1057         bool "NWFPE math emulation"
1058         depends on !AEABI || OABI_COMPAT
1059         ---help---
1060           Say Y to include the NWFPE floating point emulator in the kernel.
1061           This is necessary to run most binaries. Linux does not currently
1062           support floating point hardware so you need to say Y here even if
1063           your machine has an FPA or floating point co-processor podule.
1064
1065           You may say N here if you are going to load the Acorn FPEmulator
1066           early in the bootup.
1067
1068 config FPE_NWFPE_XP
1069         bool "Support extended precision"
1070         depends on FPE_NWFPE
1071         help
1072           Say Y to include 80-bit support in the kernel floating-point
1073           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1074           Note that gcc does not generate 80-bit operations by default,
1075           so in most cases this option only enlarges the size of the
1076           floating point emulator without any good reason.
1077
1078           You almost surely want to say N here.
1079
1080 config FPE_FASTFPE
1081         bool "FastFPE math emulation (EXPERIMENTAL)"
1082         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1083         ---help---
1084           Say Y here to include the FAST floating point emulator in the kernel.
1085           This is an experimental much faster emulator which now also has full
1086           precision for the mantissa.  It does not support any exceptions.
1087           It is very simple, and approximately 3-6 times faster than NWFPE.
1088
1089           It should be sufficient for most programs.  It may be not suitable
1090           for scientific calculations, but you have to check this for yourself.
1091           If you do not feel you need a faster FP emulation you should better
1092           choose NWFPE.
1093
1094 config VFP
1095         bool "VFP-format floating point maths"
1096         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1097         help
1098           Say Y to include VFP support code in the kernel. This is needed
1099           if your hardware includes a VFP unit.
1100
1101           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1102           release notes and additional status information.
1103
1104           Say N if your target does not have VFP hardware.
1105
1106 config VFPv3
1107         bool
1108         depends on VFP
1109         default y if CPU_V7
1110
1111 config NEON
1112         bool "Advanced SIMD (NEON) Extension support"
1113         depends on VFPv3 && CPU_V7
1114         help
1115           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1116           Extension.
1117
1118 endmenu
1119
1120 menu "Userspace binary formats"
1121
1122 source "fs/Kconfig.binfmt"
1123
1124 config ARTHUR
1125         tristate "RISC OS personality"
1126         depends on !AEABI
1127         help
1128           Say Y here to include the kernel code necessary if you want to run
1129           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1130           experimental; if this sounds frightening, say N and sleep in peace.
1131           You can also say M here to compile this support as a module (which
1132           will be called arthur).
1133
1134 endmenu
1135
1136 menu "Power management options"
1137
1138 source "kernel/power/Kconfig"
1139
1140 config ARCH_SUSPEND_POSSIBLE
1141         def_bool y
1142
1143 endmenu
1144
1145 source "net/Kconfig"
1146
1147 menu "Device Drivers"
1148
1149 source "drivers/base/Kconfig"
1150
1151 source "drivers/connector/Kconfig"
1152
1153 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1154 source "drivers/mtd/Kconfig"
1155 endif
1156
1157 source "drivers/parport/Kconfig"
1158
1159 source "drivers/pnp/Kconfig"
1160
1161 source "drivers/block/Kconfig"
1162
1163 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1164
1165 source "drivers/misc/Kconfig"
1166
1167 source "drivers/ide/Kconfig"
1168
1169 source "drivers/scsi/Kconfig"
1170
1171 source "drivers/ata/Kconfig"
1172
1173 source "drivers/md/Kconfig"
1174
1175 source "drivers/message/fusion/Kconfig"
1176
1177 source "drivers/ieee1394/Kconfig"
1178
1179 source "drivers/message/i2o/Kconfig"
1180
1181 source "drivers/net/Kconfig"
1182
1183 source "drivers/isdn/Kconfig"
1184
1185 # input before char - char/joystick depends on it. As does USB.
1186
1187 source "drivers/input/Kconfig"
1188
1189 source "drivers/char/Kconfig"
1190
1191 source "drivers/i2c/Kconfig"
1192
1193 source "drivers/spi/Kconfig"
1194
1195 source "drivers/gpio/Kconfig"
1196
1197 source "drivers/w1/Kconfig"
1198
1199 source "drivers/power/Kconfig"
1200
1201 source "drivers/hwmon/Kconfig"
1202
1203 source "drivers/watchdog/Kconfig"
1204
1205 source "drivers/ssb/Kconfig"
1206
1207 #source "drivers/l3/Kconfig"
1208
1209 source "drivers/mfd/Kconfig"
1210
1211 source "drivers/media/Kconfig"
1212
1213 source "drivers/video/Kconfig"
1214
1215 source "sound/Kconfig"
1216
1217 source "drivers/hid/Kconfig"
1218
1219 source "drivers/usb/Kconfig"
1220
1221 source "drivers/mmc/Kconfig"
1222
1223 source "drivers/leds/Kconfig"
1224
1225 source "drivers/rtc/Kconfig"
1226
1227 source "drivers/dma/Kconfig"
1228
1229 source "drivers/dca/Kconfig"
1230
1231 source "drivers/regulator/Kconfig"
1232
1233 source "drivers/uio/Kconfig"
1234
1235 endmenu
1236
1237 source "fs/Kconfig"
1238
1239 source "arch/arm/Kconfig.debug"
1240
1241 source "security/Kconfig"
1242
1243 source "crypto/Kconfig"
1244
1245 source "lib/Kconfig"