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 if OPROFILE
 156
 157 config OPROFILE_ARMV6
 158         def_bool y
 159         depends on CPU_V6 && !SMP
 160         select OPROFILE_ARM11_CORE
 161
 162 config OPROFILE_MPCORE
 163         def_bool y
 164         depends on CPU_V6 && SMP
 165         select OPROFILE_ARM11_CORE
 166
 167 config OPROFILE_ARM11_CORE
 168         bool
 169
 170 endif
 171
 172 config VECTORS_BASE
 173         hex
 174         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 175         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 176         default 0x00000000
 177         help
 178           The base address of exception vectors.
 179
 180 source "init/Kconfig"
 181
 182 menu "System Type"
 183
 184 choice
 185         prompt "ARM system type"
 186         default ARCH_VERSATILE
 187
 188 config ARCH_AAEC2000
 189         bool "Agilent AAEC-2000 based"
 190         select ARM_AMBA
 191         help
 192           This enables support for systems based on the Agilent AAEC-2000
 193
 194 config ARCH_INTEGRATOR
 195         bool "ARM Ltd. Integrator family"
 196         select ARM_AMBA
 197         select ICST525
 198         help
 199           Support for ARM's Integrator platform.
 200
 201 config ARCH_REALVIEW
 202         bool "ARM Ltd. RealView family"
 203         select ARM_AMBA
 204         select ICST307
 205         select GENERIC_TIME
 206         select GENERIC_CLOCKEVENTS
 207         help
 208           This enables support for ARM Ltd RealView boards.
 209
 210 config ARCH_VERSATILE
 211         bool "ARM Ltd. Versatile family"
 212         select ARM_AMBA
 213         select ARM_VIC
 214         select ICST307
 215         select GENERIC_TIME
 216         select GENERIC_CLOCKEVENTS
 217         help
 218           This enables support for ARM Ltd Versatile board.
 219
 220 config ARCH_AT91
 221         bool "Atmel AT91"
 222         select GENERIC_GPIO
 223         help
 224           This enables support for systems based on the Atmel AT91RM9200,
 225           AT91SAM9 and AT91CAP9 processors.
 226
 227 config ARCH_CLPS7500
 228         bool "Cirrus CL-PS7500FE"
 229         select TIMER_ACORN
 230         select ISA
 231         select NO_IOPORT
 232         help
 233           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 234
 235 config ARCH_CLPS711X
 236         bool "Cirrus Logic CLPS711x/EP721x-based"
 237         help
 238           Support for Cirrus Logic 711x/721x based boards.
 239
 240 config ARCH_CO285
 241         bool "Co-EBSA285"
 242         select FOOTBRIDGE
 243         select FOOTBRIDGE_ADDIN
 244         help
 245           Support for Intel's EBSA285 companion chip.
 246
 247 config ARCH_EBSA110
 248         bool "EBSA-110"
 249         select ISA
 250         select NO_IOPORT
 251         help
 252           This is an evaluation board for the StrongARM processor available
 253           from Digital. It has limited hardware on-board, including an
 254           Ethernet interface, two PCMCIA sockets, two serial ports and a
 255           parallel port.
 256
 257 config ARCH_EP93XX
 258         bool "EP93xx-based"
 259         select ARM_AMBA
 260         select ARM_VIC
 261         select GENERIC_GPIO
 262         select HAVE_GPIO_LIB
 263         help
 264           This enables support for the Cirrus EP93xx series of CPUs.
 265
 266 config ARCH_FOOTBRIDGE
 267         bool "FootBridge"
 268         select FOOTBRIDGE
 269         help
 270           Support for systems based on the DC21285 companion chip
 271           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 272
 273 config ARCH_NETX
 274         bool "Hilscher NetX based"
 275         select ARM_VIC
 276         help
 277           This enables support for systems based on the Hilscher NetX Soc
 278
 279 config ARCH_H720X
 280         bool "Hynix HMS720x-based"
 281         select ISA_DMA_API
 282         help
 283           This enables support for systems based on the Hynix HMS720x
 284
 285 config ARCH_IMX
 286         bool "IMX"
 287         select GENERIC_GPIO
 288         select GENERIC_TIME
 289         select GENERIC_CLOCKEVENTS
 290         help
 291           Support for Motorola's i.MX family of processors (MX1, MXL).
 292
 293 config ARCH_IOP13XX
 294         bool "IOP13xx-based"
 295         depends on MMU
 296         select PLAT_IOP
 297         select PCI
 298         select ARCH_SUPPORTS_MSI
 299         help
 300           Support for Intel's IOP13XX (XScale) family of processors.
 301
 302 config ARCH_IOP32X
 303         bool "IOP32x-based"
 304         depends on MMU
 305         select PLAT_IOP
 306         select PCI
 307         help
 308           Support for Intel's 80219 and IOP32X (XScale) family of
 309           processors.
 310
 311 config ARCH_IOP33X
 312         bool "IOP33x-based"
 313         depends on MMU
 314         select PLAT_IOP
 315         select PCI
 316         help
 317           Support for Intel's IOP33X (XScale) family of processors.
 318
 319 config ARCH_IXP23XX
 320         bool "IXP23XX-based"
 321         depends on MMU
 322         select PCI
 323         help
 324           Support for Intel's IXP23xx (XScale) family of processors.
 325
 326 config ARCH_IXP2000
 327         bool "IXP2400/2800-based"
 328         depends on MMU
 329         select PCI
 330         help
 331           Support for Intel's IXP2400/2800 (XScale) family of processors.
 332
 333 config ARCH_IXP4XX
 334         bool "IXP4xx-based"
 335         depends on MMU
 336         select GENERIC_GPIO
 337         select GENERIC_TIME
 338         select GENERIC_CLOCKEVENTS
 339         help
 340           Support for Intel's IXP4XX (XScale) family of processors.
 341
 342 config ARCH_L7200
 343         bool "LinkUp-L7200"
 344         select FIQ
 345         help
 346           Say Y here if you intend to run this kernel on a LinkUp Systems
 347           L7200 Software Development Board which uses an ARM720T processor.
 348           Information on this board can be obtained at:
 349
 350           <http://www.linkupsys.com/>
 351
 352           If you have any questions or comments about the Linux kernel port
 353           to this board, send e-mail to <sjhill@cotw.com>.
 354
 355 config ARCH_KS8695
 356         bool "Micrel/Kendin KS8695"
 357         select GENERIC_GPIO
 358         help
 359           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 360           System-on-Chip devices.
 361
 362 config ARCH_NS9XXX
 363         bool "NetSilicon NS9xxx"
 364         select GENERIC_GPIO
 365         select GENERIC_TIME
 366         select GENERIC_CLOCKEVENTS
 367         help
 368           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 369           System.
 370
 371           <http://www.digi.com/products/microprocessors/index.jsp>
 372
 373 config ARCH_MXC
 374         bool "Freescale MXC/iMX-based"
 375         select ARCH_MTD_XIP
 376         help
 377           Support for Freescale MXC/iMX-based family of processors
 378
 379 config ARCH_ORION5X
 380         bool "Marvell Orion"
 381         depends on MMU
 382         select PCI
 383         select GENERIC_GPIO
 384         select GENERIC_TIME
 385         select GENERIC_CLOCKEVENTS
 386         select PLAT_ORION
 387         help
 388           Support for the following Marvell Orion 5x series SoCs:
 389           Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)
 390
 391 config ARCH_PNX4008
 392         bool "Philips Nexperia PNX4008 Mobile"
 393         help
 394           This enables support for Philips PNX4008 mobile platform.
 395
 396 config ARCH_PXA
 397         bool "PXA2xx/PXA3xx-based"
 398         depends on MMU
 399         select ARCH_MTD_XIP
 400         select GENERIC_GPIO
 401         select HAVE_GPIO_LIB
 402         select GENERIC_TIME
 403         select GENERIC_CLOCKEVENTS
 404         select TICK_ONESHOT
 405         help
 406           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 407
 408 config ARCH_RPC
 409         bool "RiscPC"
 410         select ARCH_ACORN
 411         select FIQ
 412         select TIMER_ACORN
 413         select ARCH_MAY_HAVE_PC_FDC
 414         select ISA_DMA_API
 415         select NO_IOPORT
 416         help
 417           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 418           CD-ROM interface, serial and parallel port, and the floppy drive.
 419
 420 config ARCH_SA1100
 421         bool "SA1100-based"
 422         select ISA
 423         select ARCH_DISCONTIGMEM_ENABLE
 424         select ARCH_SPARSEMEM_ENABLE
 425         select ARCH_SELECT_MEMORY_MODEL
 426         select ARCH_MTD_XIP
 427         select GENERIC_GPIO
 428         select GENERIC_TIME
 429         select GENERIC_CLOCKEVENTS
 430         select TICK_ONESHOT
 431         select HAVE_GPIO_LIB
 432         help
 433           Support for StrongARM 11x0 based boards.
 434
 435 config ARCH_S3C2410
 436         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 437         select GENERIC_GPIO
 438         help
 439           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 440           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 441           the Samsung SMDK2410 development board (and derivatives).
 442
 443 config ARCH_SHARK
 444         bool "Shark"
 445         select ISA
 446         select ISA_DMA
 447         select PCI
 448         help
 449           Support for the StrongARM based Digital DNARD machine, also known
 450           as "Shark" (<http://www.shark-linux.de/shark.html>).
 451
 452 config ARCH_LH7A40X
 453         bool "Sharp LH7A40X"
 454         help
 455           Say Y here for systems based on one of the Sharp LH7A40X
 456           System on a Chip processors.  These CPUs include an ARM922T
 457           core with a wide array of integrated devices for
 458           hand-held and low-power applications.
 459
 460 config ARCH_DAVINCI
 461         bool "TI DaVinci"
 462         select GENERIC_TIME
 463         select GENERIC_CLOCKEVENTS
 464         select GENERIC_GPIO
 465         help
 466           Support for TI's DaVinci platform.
 467
 468 config ARCH_OMAP
 469         bool "TI OMAP"
 470         select GENERIC_GPIO
 471         select HAVE_GPIO_LIB
 472         select GENERIC_TIME
 473         select GENERIC_CLOCKEVENTS
 474         help
 475           Support for TI's OMAP platform (OMAP1 and OMAP2).
 476
 477 config ARCH_MSM7X00A
 478         bool "Qualcomm MSM7X00A"
 479         select GENERIC_TIME
 480         select GENERIC_CLOCKEVENTS
 481         help
 482           Support for Qualcomm MSM7X00A based systems.  This runs on the ARM11
 483           apps processor of the MSM7X00A and depends on a shared memory
 484           interface to the ARM9 modem processor which runs the baseband stack
 485           and controls some vital subsystems (clock and power control, etc).
 486           <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
 487
 488 endchoice
 489
 490 source "arch/arm/mach-clps711x/Kconfig"
 491
 492 source "arch/arm/mach-ep93xx/Kconfig"
 493
 494 source "arch/arm/mach-footbridge/Kconfig"
 495
 496 source "arch/arm/mach-integrator/Kconfig"
 497
 498 source "arch/arm/mach-iop32x/Kconfig"
 499
 500 source "arch/arm/mach-iop33x/Kconfig"
 501
 502 source "arch/arm/mach-iop13xx/Kconfig"
 503
 504 source "arch/arm/mach-ixp4xx/Kconfig"
 505
 506 source "arch/arm/mach-ixp2000/Kconfig"
 507
 508 source "arch/arm/mach-ixp23xx/Kconfig"
 509
 510 source "arch/arm/mach-pxa/Kconfig"
 511
 512 source "arch/arm/mach-sa1100/Kconfig"
 513
 514 source "arch/arm/plat-omap/Kconfig"
 515
 516 source "arch/arm/mach-omap1/Kconfig"
 517
 518 source "arch/arm/mach-omap2/Kconfig"
 519
 520 source "arch/arm/mach-orion5x/Kconfig"
 521
 522 source "arch/arm/plat-s3c24xx/Kconfig"
 523 source "arch/arm/plat-s3c/Kconfig"
 524
 525 if ARCH_S3C2410
 526 source "arch/arm/mach-s3c2400/Kconfig"
 527 source "arch/arm/mach-s3c2410/Kconfig"
 528 source "arch/arm/mach-s3c2412/Kconfig"
 529 source "arch/arm/mach-s3c2440/Kconfig"
 530 source "arch/arm/mach-s3c2442/Kconfig"
 531 source "arch/arm/mach-s3c2443/Kconfig"
 532 endif
 533
 534 source "arch/arm/mach-lh7a40x/Kconfig"
 535
 536 source "arch/arm/mach-imx/Kconfig"
 537
 538 source "arch/arm/mach-h720x/Kconfig"
 539
 540 source "arch/arm/mach-versatile/Kconfig"
 541
 542 source "arch/arm/mach-aaec2000/Kconfig"
 543
 544 source "arch/arm/mach-realview/Kconfig"
 545
 546 source "arch/arm/mach-at91/Kconfig"
 547
 548 source "arch/arm/plat-mxc/Kconfig"
 549
 550 source "arch/arm/mach-netx/Kconfig"
 551
 552 source "arch/arm/mach-ns9xxx/Kconfig"
 553
 554 source "arch/arm/mach-davinci/Kconfig"
 555
 556 source "arch/arm/mach-ks8695/Kconfig"
 557
 558 source "arch/arm/mach-msm/Kconfig"
 559
 560 # Definitions to make life easier
 561 config ARCH_ACORN
 562         bool
 563
 564 config PLAT_IOP
 565         bool
 566
 567 config PLAT_ORION
 568         bool
 569
 570 source arch/arm/mm/Kconfig
 571
 572 config IWMMXT
 573         bool "Enable iWMMXt support"
 574         depends on CPU_XSCALE || CPU_XSC3
 575         default y if PXA27x || PXA3xx
 576         help
 577           Enable support for iWMMXt context switching at run time if
 578           running on a CPU that supports it.
 579
 580 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 581 config XSCALE_PMU
 582         bool
 583         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 584         default y
 585
 586 if !MMU
 587 source "arch/arm/Kconfig-nommu"
 588 endif
 589
 590 endmenu
 591
 592 source "arch/arm/common/Kconfig"
 593
 594 config FORCE_MAX_ZONEORDER
 595         int
 596         depends on SA1111
 597         default "9"
 598
 599 menu "Bus support"
 600
 601 config ARM_AMBA
 602         bool
 603
 604 config ISA
 605         bool
 606         help
 607           Find out whether you have ISA slots on your motherboard.  ISA is the
 608           name of a bus system, i.e. the way the CPU talks to the other stuff
 609           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 610           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 611           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 612
 613 # Select ISA DMA controller support
 614 config ISA_DMA
 615         bool
 616         select ISA_DMA_API
 617
 618 # Select ISA DMA interface
 619 config ISA_DMA_API
 620         bool
 621
 622 config PCI
 623         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 624         help
 625           Find out whether you have a PCI motherboard. PCI is the name of a
 626           bus system, i.e. the way the CPU talks to the other stuff inside
 627           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 628           VESA. If you have PCI, say Y, otherwise N.
 629
 630 config PCI_SYSCALL
 631         def_bool PCI
 632
 633 # Select the host bridge type
 634 config PCI_HOST_VIA82C505
 635         bool
 636         depends on PCI && ARCH_SHARK
 637         default y
 638
 639 config PCI_HOST_ITE8152
 640         bool
 641         depends on PCI && MACH_ARMCORE
 642         default y
 643         select DMABOUNCE
 644
 645 source "drivers/pci/Kconfig"
 646
 647 source "drivers/pcmcia/Kconfig"
 648
 649 endmenu
 650
 651 menu "Kernel Features"
 652
 653 source "kernel/time/Kconfig"
 654
 655 config SMP
 656         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 657         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 658         help
 659           This enables support for systems with more than one CPU. If you have
 660           a system with only one CPU, like most personal computers, say N. If
 661           you have a system with more than one CPU, say Y.
 662
 663           If you say N here, the kernel will run on single and multiprocessor
 664           machines, but will use only one CPU of a multiprocessor machine. If
 665           you say Y here, the kernel will run on many, but not all, single
 666           processor machines. On a single processor machine, the kernel will
 667           run faster if you say N here.
 668
 669           See also <file:Documentation/i386/IO-APIC.txt>,
 670           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 671           <http://www.linuxdoc.org/docs.html#howto>.
 672
 673           If you don't know what to do here, say N.
 674
 675 config NR_CPUS
 676         int "Maximum number of CPUs (2-32)"
 677         range 2 32
 678         depends on SMP
 679         default "4"
 680
 681 config HOTPLUG_CPU
 682         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 683         depends on SMP && HOTPLUG && EXPERIMENTAL
 684         help
 685           Say Y here to experiment with turning CPUs off and on.  CPUs
 686           can be controlled through /sys/devices/system/cpu.
 687
 688 config LOCAL_TIMERS
 689         bool "Use local timer interrupts"
 690         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 691         default y
 692         help
 693           Enable support for local timers on SMP platforms, rather then the
 694           legacy IPI broadcast method.  Local timers allows the system
 695           accounting to be spread across the timer interval, preventing a
 696           "thundering herd" at every timer tick.
 697
 698 config PREEMPT
 699         bool "Preemptible Kernel (EXPERIMENTAL)"
 700         depends on EXPERIMENTAL
 701         help
 702           This option reduces the latency of the kernel when reacting to
 703           real-time or interactive events by allowing a low priority process to
 704           be preempted even if it is in kernel mode executing a system call.
 705           This allows applications to run more reliably even when the system is
 706           under load.
 707
 708           Say Y here if you are building a kernel for a desktop, embedded
 709           or real-time system.  Say N if you are unsure.
 710
 711 config NO_IDLE_HZ
 712         bool "Dynamic tick timer"
 713         depends on !GENERIC_CLOCKEVENTS
 714         help
 715           Select this option if you want to disable continuous timer ticks
 716           and have them programmed to occur as required. This option saves
 717           power as the system can remain in idle state for longer.
 718
 719           By default dynamic tick is disabled during the boot, and can be
 720           manually enabled with:
 721
 722             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 723
 724           Alternatively, if you want dynamic tick automatically enabled
 725           during boot, pass "dyntick=enable" via the kernel command string.
 726
 727           Please note that dynamic tick may affect the accuracy of
 728           timekeeping on some platforms depending on the implementation.
 729           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 730           to have accurate timekeeping with dynamic tick.
 731
 732 config HZ
 733         int
 734         default 128 if ARCH_L7200
 735         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 736         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 737         default AT91_TIMER_HZ if ARCH_AT91
 738         default 100
 739
 740 config AEABI
 741         bool "Use the ARM EABI to compile the kernel"
 742         help
 743           This option allows for the kernel to be compiled using the latest
 744           ARM ABI (aka EABI).  This is only useful if you are using a user
 745           space environment that is also compiled with EABI.
 746
 747           Since there are major incompatibilities between the legacy ABI and
 748           EABI, especially with regard to structure member alignment, this
 749           option also changes the kernel syscall calling convention to
 750           disambiguate both ABIs and allow for backward compatibility support
 751           (selected with CONFIG_OABI_COMPAT).
 752
 753           To use this you need GCC version 4.0.0 or later.
 754
 755 config OABI_COMPAT
 756         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 757         depends on AEABI && EXPERIMENTAL
 758         default y
 759         help
 760           This option preserves the old syscall interface along with the
 761           new (ARM EABI) one. It also provides a compatibility layer to
 762           intercept syscalls that have structure arguments which layout
 763           in memory differs between the legacy ABI and the new ARM EABI
 764           (only for non "thumb" binaries). This option adds a tiny
 765           overhead to all syscalls and produces a slightly larger kernel.
 766           If you know you'll be using only pure EABI user space then you
 767           can say N here. If this option is not selected and you attempt
 768           to execute a legacy ABI binary then the result will be
 769           UNPREDICTABLE (in fact it can be predicted that it won't work
 770           at all). If in doubt say Y.
 771
 772 config ARCH_DISCONTIGMEM_ENABLE
 773         bool
 774         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 775         help
 776           Say Y to support efficient handling of discontiguous physical memory,
 777           for architectures which are either NUMA (Non-Uniform Memory Access)
 778           or have huge holes in the physical address space for other reasons.
 779           See <file:Documentation/vm/numa> for more.
 780
 781 config ARCH_SPARSEMEM_ENABLE
 782         bool
 783
 784 config ARCH_SELECT_MEMORY_MODEL
 785         bool
 786
 787 config NODES_SHIFT
 788         int
 789         default "4" if ARCH_LH7A40X
 790         default "2"
 791         depends on NEED_MULTIPLE_NODES
 792
 793 source "mm/Kconfig"
 794
 795 config LEDS
 796         bool "Timer and CPU usage LEDs"
 797         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 798                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 799                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 800                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 801                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 802                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 803                    ARCH_KS8695 || MACH_RD88F5182
 804         help
 805           If you say Y here, the LEDs on your machine will be used
 806           to provide useful information about your current system status.
 807
 808           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 809           be able to select which LEDs are active using the options below. If
 810           you are compiling a kernel for the EBSA-110 or the LART however, the
 811           red LED will simply flash regularly to indicate that the system is
 812           still functional. It is safe to say Y here if you have a CATS
 813           system, but the driver will do nothing.
 814
 815 config LEDS_TIMER
 816         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 817                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 818                             || MACH_OMAP_PERSEUS2
 819         depends on LEDS
 820         depends on !GENERIC_CLOCKEVENTS
 821         default y if ARCH_EBSA110
 822         help
 823           If you say Y here, one of the system LEDs (the green one on the
 824           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 825           will flash regularly to indicate that the system is still
 826           operational. This is mainly useful to kernel hackers who are
 827           debugging unstable kernels.
 828
 829           The LART uses the same LED for both Timer LED and CPU usage LED
 830           functions. You may choose to use both, but the Timer LED function
 831           will overrule the CPU usage LED.
 832
 833 config LEDS_CPU
 834         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 835                         !ARCH_OMAP) \
 836                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 837                         || MACH_OMAP_PERSEUS2
 838         depends on LEDS
 839         help
 840           If you say Y here, the red LED will be used to give a good real
 841           time indication of CPU usage, by lighting whenever the idle task
 842           is not currently executing.
 843
 844           The LART uses the same LED for both Timer LED and CPU usage LED
 845           functions. You may choose to use both, but the Timer LED function
 846           will overrule the CPU usage LED.
 847
 848 config ALIGNMENT_TRAP
 849         bool
 850         depends on CPU_CP15_MMU
 851         default y if !ARCH_EBSA110
 852         help
 853           ARM processors cannot fetch/store information which is not
 854           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 855           address divisible by 4. On 32-bit ARM processors, these non-aligned
 856           fetch/store instructions will be emulated in software if you say
 857           here, which has a severe performance impact. This is necessary for
 858           correct operation of some network protocols. With an IP-only
 859           configuration it is safe to say N, otherwise say Y.
 860
 861 endmenu
 862
 863 menu "Boot options"
 864
 865 # Compressed boot loader in ROM.  Yes, we really want to ask about
 866 # TEXT and BSS so we preserve their values in the config files.
 867 config ZBOOT_ROM_TEXT
 868         hex "Compressed ROM boot loader base address"
 869         default "0"
 870         help
 871           The physical address at which the ROM-able zImage is to be
 872           placed in the target.  Platforms which normally make use of
 873           ROM-able zImage formats normally set this to a suitable
 874           value in their defconfig file.
 875
 876           If ZBOOT_ROM is not enabled, this has no effect.
 877
 878 config ZBOOT_ROM_BSS
 879         hex "Compressed ROM boot loader BSS address"
 880         default "0"
 881         help
 882           The base address of an area of read/write memory in the target
 883           for the ROM-able zImage which must be available while the
 884           decompressor is running. It must be large enough to hold the
 885           entire decompressed kernel plus an additional 128 KiB.
 886           Platforms which normally make use of ROM-able zImage formats
 887           normally set this to a suitable value in their defconfig file.
 888
 889           If ZBOOT_ROM is not enabled, this has no effect.
 890
 891 config ZBOOT_ROM
 892         bool "Compressed boot loader in ROM/flash"
 893         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 894         help
 895           Say Y here if you intend to execute your compressed kernel image
 896           (zImage) directly from ROM or flash.  If unsure, say N.
 897
 898 config CMDLINE
 899         string "Default kernel command string"
 900         default ""
 901         help
 902           On some architectures (EBSA110 and CATS), there is currently no way
 903           for the boot loader to pass arguments to the kernel. For these
 904           architectures, you should supply some command-line options at build
 905           time by entering them here. As a minimum, you should specify the
 906           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 907
 908 config XIP_KERNEL
 909         bool "Kernel Execute-In-Place from ROM"
 910         depends on !ZBOOT_ROM
 911         help
 912           Execute-In-Place allows the kernel to run from non-volatile storage
 913           directly addressable by the CPU, such as NOR flash. This saves RAM
 914           space since the text section of the kernel is not loaded from flash
 915           to RAM.  Read-write sections, such as the data section and stack,
 916           are still copied to RAM.  The XIP kernel is not compressed since
 917           it has to run directly from flash, so it will take more space to
 918           store it.  The flash address used to link the kernel object files,
 919           and for storing it, is configuration dependent. Therefore, if you
 920           say Y here, you must know the proper physical address where to
 921           store the kernel image depending on your own flash memory usage.
 922
 923           Also note that the make target becomes "make xipImage" rather than
 924           "make zImage" or "make Image".  The final kernel binary to put in
 925           ROM memory will be arch/arm/boot/xipImage.
 926
 927           If unsure, say N.
 928
 929 config XIP_PHYS_ADDR
 930         hex "XIP Kernel Physical Location"
 931         depends on XIP_KERNEL
 932         default "0x00080000"
 933         help
 934           This is the physical address in your flash memory the kernel will
 935           be linked for and stored to.  This address is dependent on your
 936           own flash usage.
 937
 938 config KEXEC
 939         bool "Kexec system call (EXPERIMENTAL)"
 940         depends on EXPERIMENTAL
 941         help
 942           kexec is a system call that implements the ability to shutdown your
 943           current kernel, and to start another kernel.  It is like a reboot
 944           but it is independent of the system firmware.   And like a reboot
 945           you can start any kernel with it, not just Linux.
 946
 947           It is an ongoing process to be certain the hardware in a machine
 948           is properly shutdown, so do not be surprised if this code does not
 949           initially work for you.  It may help to enable device hotplugging
 950           support.
 951
 952 config ATAGS_PROC
 953         bool "Export atags in procfs"
 954         depends on KEXEC
 955         default y
 956         help
 957           Should the atags used to boot the kernel be exported in an "atags"
 958           file in procfs. Useful with kexec.
 959
 960 endmenu
 961
 962 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
 963
 964 menu "CPU Frequency scaling"
 965
 966 source "drivers/cpufreq/Kconfig"
 967
 968 config CPU_FREQ_SA1100
 969         bool
 970         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 971         default y
 972
 973 config CPU_FREQ_SA1110
 974         bool
 975         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 976         default y
 977
 978 config CPU_FREQ_INTEGRATOR
 979         tristate "CPUfreq driver for ARM Integrator CPUs"
 980         depends on ARCH_INTEGRATOR && CPU_FREQ
 981         default y
 982         help
 983           This enables the CPUfreq driver for ARM Integrator CPUs.
 984
 985           For details, take a look at <file:Documentation/cpu-freq>.
 986
 987           If in doubt, say Y.
 988
 989 config CPU_FREQ_IMX
 990         tristate "CPUfreq driver for i.MX CPUs"
 991         depends on ARCH_IMX && CPU_FREQ
 992         default n
 993         help
 994           This enables the CPUfreq driver for i.MX CPUs.
 995
 996           If in doubt, say N.
 997
 998 config CPU_FREQ_PXA
 999         bool
1000         depends on CPU_FREQ && ARCH_PXA && PXA25x
1001         default y
1002         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1003
1004 endmenu
1005
1006 endif
1007
1008 menu "Floating point emulation"
1009
1010 comment "At least one emulation must be selected"
1011
1012 config FPE_NWFPE
1013         bool "NWFPE math emulation"
1014         depends on !AEABI || OABI_COMPAT
1015         ---help---
1016           Say Y to include the NWFPE floating point emulator in the kernel.
1017           This is necessary to run most binaries. Linux does not currently
1018           support floating point hardware so you need to say Y here even if
1019           your machine has an FPA or floating point co-processor podule.
1020
1021           You may say N here if you are going to load the Acorn FPEmulator
1022           early in the bootup.
1023
1024 config FPE_NWFPE_XP
1025         bool "Support extended precision"
1026         depends on FPE_NWFPE
1027         help
1028           Say Y to include 80-bit support in the kernel floating-point
1029           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1030           Note that gcc does not generate 80-bit operations by default,
1031           so in most cases this option only enlarges the size of the
1032           floating point emulator without any good reason.
1033
1034           You almost surely want to say N here.
1035
1036 config FPE_FASTFPE
1037         bool "FastFPE math emulation (EXPERIMENTAL)"
1038         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1039         ---help---
1040           Say Y here to include the FAST floating point emulator in the kernel.
1041           This is an experimental much faster emulator which now also has full
1042           precision for the mantissa.  It does not support any exceptions.
1043           It is very simple, and approximately 3-6 times faster than NWFPE.
1044
1045           It should be sufficient for most programs.  It may be not suitable
1046           for scientific calculations, but you have to check this for yourself.
1047           If you do not feel you need a faster FP emulation you should better
1048           choose NWFPE.
1049
1050 config VFP
1051         bool "VFP-format floating point maths"
1052         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1053         help
1054           Say Y to include VFP support code in the kernel. This is needed
1055           if your hardware includes a VFP unit.
1056
1057           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1058           release notes and additional status information.
1059
1060           Say N if your target does not have VFP hardware.
1061
1062 config VFPv3
1063         bool
1064         depends on VFP
1065         default y if CPU_V7
1066
1067 config NEON
1068         bool "Advanced SIMD (NEON) Extension support"
1069         depends on VFPv3 && CPU_V7
1070         help
1071           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1072           Extension.
1073
1074 endmenu
1075
1076 menu "Userspace binary formats"
1077
1078 source "fs/Kconfig.binfmt"
1079
1080 config ARTHUR
1081         tristate "RISC OS personality"
1082         depends on !AEABI
1083         help
1084           Say Y here to include the kernel code necessary if you want to run
1085           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1086           experimental; if this sounds frightening, say N and sleep in peace.
1087           You can also say M here to compile this support as a module (which
1088           will be called arthur).
1089
1090 endmenu
1091
1092 menu "Power management options"
1093
1094 source "kernel/power/Kconfig"
1095
1096 config ARCH_SUSPEND_POSSIBLE
1097         def_bool y
1098
1099 endmenu
1100
1101 source "net/Kconfig"
1102
1103 menu "Device Drivers"
1104
1105 source "drivers/base/Kconfig"
1106
1107 source "drivers/connector/Kconfig"
1108
1109 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1110 source "drivers/mtd/Kconfig"
1111 endif
1112
1113 source "drivers/parport/Kconfig"
1114
1115 source "drivers/pnp/Kconfig"
1116
1117 source "drivers/block/Kconfig"
1118
1119 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1120
1121 source "drivers/misc/Kconfig"
1122
1123 source "drivers/ide/Kconfig"
1124
1125 source "drivers/scsi/Kconfig"
1126
1127 source "drivers/ata/Kconfig"
1128
1129 source "drivers/md/Kconfig"
1130
1131 source "drivers/message/fusion/Kconfig"
1132
1133 source "drivers/ieee1394/Kconfig"
1134
1135 source "drivers/message/i2o/Kconfig"
1136
1137 source "drivers/net/Kconfig"
1138
1139 source "drivers/isdn/Kconfig"
1140
1141 # input before char - char/joystick depends on it. As does USB.
1142
1143 source "drivers/input/Kconfig"
1144
1145 source "drivers/char/Kconfig"
1146
1147 source "drivers/i2c/Kconfig"
1148
1149 source "drivers/spi/Kconfig"
1150
1151 source "drivers/gpio/Kconfig"
1152
1153 source "drivers/w1/Kconfig"
1154
1155 source "drivers/power/Kconfig"
1156
1157 source "drivers/hwmon/Kconfig"
1158
1159 source "drivers/watchdog/Kconfig"
1160
1161 source "drivers/ssb/Kconfig"
1162
1163 #source "drivers/l3/Kconfig"
1164
1165 source "drivers/mfd/Kconfig"
1166
1167 source "drivers/media/Kconfig"
1168
1169 source "drivers/video/Kconfig"
1170
1171 source "sound/Kconfig"
1172
1173 source "drivers/hid/Kconfig"
1174
1175 source "drivers/usb/Kconfig"
1176
1177 source "drivers/mmc/Kconfig"
1178
1179 source "drivers/leds/Kconfig"
1180
1181 source "drivers/rtc/Kconfig"
1182
1183 source "drivers/dma/Kconfig"
1184
1185 source "drivers/dca/Kconfig"
1186
1187 source "drivers/uio/Kconfig"
1188
1189 endmenu
1190
1191 source "fs/Kconfig"
1192
1193 source "arch/arm/Kconfig.debug"
1194
1195 source "security/Kconfig"
1196
1197 source "crypto/Kconfig"
1198
1199 source "lib/Kconfig"