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