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 LOCKDEP_SUPPORT
  88         bool
  89         default y
  90
  91 config TRACE_IRQFLAGS_SUPPORT
  92         bool
  93         default y
  94
  95 config HARDIRQS_SW_RESEND
  96         bool
  97         default y
  98
  99 config GENERIC_IRQ_PROBE
 100         bool
 101         default y
 102
 103 config GENERIC_LOCKBREAK
 104         bool
 105         default y
 106         depends on SMP && PREEMPT
 107
 108 config RWSEM_GENERIC_SPINLOCK
 109         bool
 110         default y
 111
 112 config RWSEM_XCHGADD_ALGORITHM
 113         bool
 114
 115 config ARCH_HAS_ILOG2_U32
 116         bool
 117         default n
 118
 119 config ARCH_HAS_ILOG2_U64
 120         bool
 121         default n
 122
 123 config GENERIC_HWEIGHT
 124         bool
 125         default y
 126
 127 config GENERIC_CALIBRATE_DELAY
 128         bool
 129         default y
 130
 131 config ARCH_SUPPORTS_AOUT
 132         def_bool y
 133
 134 config ARCH_MAY_HAVE_PC_FDC
 135         bool
 136
 137 config ZONE_DMA
 138         bool
 139         default y
 140
 141 config GENERIC_ISA_DMA
 142         bool
 143
 144 config FIQ
 145         bool
 146
 147 config ARCH_MTD_XIP
 148         bool
 149
 150 if OPROFILE
 151
 152 config OPROFILE_ARMV6
 153         def_bool y
 154         depends on CPU_V6 && !SMP
 155         select OPROFILE_ARM11_CORE
 156
 157 config OPROFILE_MPCORE
 158         def_bool y
 159         depends on CPU_V6 && SMP
 160         select OPROFILE_ARM11_CORE
 161
 162 config OPROFILE_ARM11_CORE
 163         bool
 164
 165 endif
 166
 167 config VECTORS_BASE
 168         hex
 169         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 170         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 171         default 0x00000000
 172         help
 173           The base address of exception vectors.
 174
 175 source "init/Kconfig"
 176
 177 menu "System Type"
 178
 179 choice
 180         prompt "ARM system type"
 181         default ARCH_VERSATILE
 182
 183 config ARCH_AAEC2000
 184         bool "Agilent AAEC-2000 based"
 185         select ARM_AMBA
 186         help
 187           This enables support for systems based on the Agilent AAEC-2000
 188
 189 config ARCH_INTEGRATOR
 190         bool "ARM Ltd. Integrator family"
 191         select ARM_AMBA
 192         select ICST525
 193         help
 194           Support for ARM's Integrator platform.
 195
 196 config ARCH_REALVIEW
 197         bool "ARM Ltd. RealView family"
 198         select ARM_AMBA
 199         select ICST307
 200         select GENERIC_TIME
 201         select GENERIC_CLOCKEVENTS
 202         help
 203           This enables support for ARM Ltd RealView boards.
 204
 205 config ARCH_VERSATILE
 206         bool "ARM Ltd. Versatile family"
 207         select ARM_AMBA
 208         select ARM_VIC
 209         select ICST307
 210         select GENERIC_TIME
 211         select GENERIC_CLOCKEVENTS
 212         help
 213           This enables support for ARM Ltd Versatile board.
 214
 215 config ARCH_AT91
 216         bool "Atmel AT91"
 217         select GENERIC_GPIO
 218         help
 219           This enables support for systems based on the Atmel AT91RM9200,
 220           AT91SAM9 and AT91CAP9 processors.
 221
 222 config ARCH_CLPS7500
 223         bool "Cirrus CL-PS7500FE"
 224         select TIMER_ACORN
 225         select ISA
 226         select NO_IOPORT
 227         help
 228           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 229
 230 config ARCH_CLPS711X
 231         bool "Cirrus Logic CLPS711x/EP721x-based"
 232         help
 233           Support for Cirrus Logic 711x/721x based boards.
 234
 235 config ARCH_CO285
 236         bool "Co-EBSA285"
 237         select FOOTBRIDGE
 238         select FOOTBRIDGE_ADDIN
 239         help
 240           Support for Intel's EBSA285 companion chip.
 241
 242 config ARCH_EBSA110
 243         bool "EBSA-110"
 244         select ISA
 245         select NO_IOPORT
 246         help
 247           This is an evaluation board for the StrongARM processor available
 248           from Digital. It has limited hardware on-board, including an
 249           Ethernet interface, two PCMCIA sockets, two serial ports and a
 250           parallel port.
 251
 252 config ARCH_EP93XX
 253         bool "EP93xx-based"
 254         select ARM_AMBA
 255         select ARM_VIC
 256         select GENERIC_GPIO
 257         select HAVE_GPIO_LIB
 258         help
 259           This enables support for the Cirrus EP93xx series of CPUs.
 260
 261 config ARCH_FOOTBRIDGE
 262         bool "FootBridge"
 263         select FOOTBRIDGE
 264         help
 265           Support for systems based on the DC21285 companion chip
 266           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 267
 268 config ARCH_NETX
 269         bool "Hilscher NetX based"
 270         select ARM_VIC
 271         help
 272           This enables support for systems based on the Hilscher NetX Soc
 273
 274 config ARCH_H720X
 275         bool "Hynix HMS720x-based"
 276         select ISA_DMA_API
 277         help
 278           This enables support for systems based on the Hynix HMS720x
 279
 280 config ARCH_IMX
 281         bool "IMX"
 282         select GENERIC_GPIO
 283         select GENERIC_TIME
 284         select GENERIC_CLOCKEVENTS
 285         help
 286           Support for Motorola's i.MX family of processors (MX1, MXL).
 287
 288 config ARCH_IOP13XX
 289         bool "IOP13xx-based"
 290         depends on MMU
 291         select PLAT_IOP
 292         select PCI
 293         select ARCH_SUPPORTS_MSI
 294         help
 295           Support for Intel's IOP13XX (XScale) family of processors.
 296
 297 config ARCH_IOP32X
 298         bool "IOP32x-based"
 299         depends on MMU
 300         select PLAT_IOP
 301         select PCI
 302         help
 303           Support for Intel's 80219 and IOP32X (XScale) family of
 304           processors.
 305
 306 config ARCH_IOP33X
 307         bool "IOP33x-based"
 308         depends on MMU
 309         select PLAT_IOP
 310         select PCI
 311         help
 312           Support for Intel's IOP33X (XScale) family of processors.
 313
 314 config ARCH_IXP23XX
 315         bool "IXP23XX-based"
 316         depends on MMU
 317         select PCI
 318         help
 319           Support for Intel's IXP23xx (XScale) family of processors.
 320
 321 config ARCH_IXP2000
 322         bool "IXP2400/2800-based"
 323         depends on MMU
 324         select PCI
 325         help
 326           Support for Intel's IXP2400/2800 (XScale) family of processors.
 327
 328 config ARCH_IXP4XX
 329         bool "IXP4xx-based"
 330         depends on MMU
 331         select GENERIC_GPIO
 332         select GENERIC_TIME
 333         select GENERIC_CLOCKEVENTS
 334         help
 335           Support for Intel's IXP4XX (XScale) family of processors.
 336
 337 config ARCH_L7200
 338         bool "LinkUp-L7200"
 339         select FIQ
 340         help
 341           Say Y here if you intend to run this kernel on a LinkUp Systems
 342           L7200 Software Development Board which uses an ARM720T processor.
 343           Information on this board can be obtained at:
 344
 345           <http://www.linkupsys.com/>
 346
 347           If you have any questions or comments about the Linux kernel port
 348           to this board, send e-mail to <sjhill@cotw.com>.
 349
 350 config ARCH_KS8695
 351         bool "Micrel/Kendin KS8695"
 352         select GENERIC_GPIO
 353         help
 354           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 355           System-on-Chip devices.
 356
 357 config ARCH_NS9XXX
 358         bool "NetSilicon NS9xxx"
 359         select GENERIC_GPIO
 360         select GENERIC_TIME
 361         select GENERIC_CLOCKEVENTS
 362         help
 363           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 364           System.
 365
 366           <http://www.digi.com/products/microprocessors/index.jsp>
 367
 368 config ARCH_MXC
 369         bool "Freescale MXC/iMX-based"
 370         select ARCH_MTD_XIP
 371         help
 372           Support for Freescale MXC/iMX-based family of processors
 373
 374 config ARCH_ORION5X
 375         bool "Marvell Orion"
 376         depends on MMU
 377         select PCI
 378         select GENERIC_GPIO
 379         select GENERIC_TIME
 380         select GENERIC_CLOCKEVENTS
 381         select PLAT_ORION
 382         help
 383           Support for the following Marvell Orion 5x series SoCs:
 384           Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)
 385
 386 config ARCH_PNX4008
 387         bool "Philips Nexperia PNX4008 Mobile"
 388         help
 389           This enables support for Philips PNX4008 mobile platform.
 390
 391 config ARCH_PXA
 392         bool "PXA2xx/PXA3xx-based"
 393         depends on MMU
 394         select ARCH_MTD_XIP
 395         select GENERIC_GPIO
 396         select HAVE_GPIO_LIB
 397         select GENERIC_TIME
 398         select GENERIC_CLOCKEVENTS
 399         select TICK_ONESHOT
 400         help
 401           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 402
 403 config ARCH_RPC
 404         bool "RiscPC"
 405         select ARCH_ACORN
 406         select FIQ
 407         select TIMER_ACORN
 408         select ARCH_MAY_HAVE_PC_FDC
 409         select ISA_DMA_API
 410         select NO_IOPORT
 411         help
 412           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 413           CD-ROM interface, serial and parallel port, and the floppy drive.
 414
 415 config ARCH_SA1100
 416         bool "SA1100-based"
 417         select ISA
 418         select ARCH_DISCONTIGMEM_ENABLE
 419         select ARCH_SPARSEMEM_ENABLE
 420         select ARCH_SELECT_MEMORY_MODEL
 421         select ARCH_MTD_XIP
 422         select GENERIC_GPIO
 423         select GENERIC_TIME
 424         select GENERIC_CLOCKEVENTS
 425         select TICK_ONESHOT
 426         select HAVE_GPIO_LIB
 427         help
 428           Support for StrongARM 11x0 based boards.
 429
 430 config ARCH_S3C2410
 431         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 432         select GENERIC_GPIO
 433         help
 434           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 435           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 436           the Samsung SMDK2410 development board (and derivatives).
 437
 438 config ARCH_SHARK
 439         bool "Shark"
 440         select ISA
 441         select ISA_DMA
 442         select PCI
 443         help
 444           Support for the StrongARM based Digital DNARD machine, also known
 445           as "Shark" (<http://www.shark-linux.de/shark.html>).
 446
 447 config ARCH_LH7A40X
 448         bool "Sharp LH7A40X"
 449         help
 450           Say Y here for systems based on one of the Sharp LH7A40X
 451           System on a Chip processors.  These CPUs include an ARM922T
 452           core with a wide array of integrated devices for
 453           hand-held and low-power applications.
 454
 455 config ARCH_DAVINCI
 456         bool "TI DaVinci"
 457         select GENERIC_TIME
 458         select GENERIC_CLOCKEVENTS
 459         select GENERIC_GPIO
 460         help
 461           Support for TI's DaVinci platform.
 462
 463 config ARCH_OMAP
 464         bool "TI OMAP"
 465         select GENERIC_GPIO
 466         select HAVE_GPIO_LIB
 467         select GENERIC_TIME
 468         select GENERIC_CLOCKEVENTS
 469         help
 470           Support for TI's OMAP platform (OMAP1 and OMAP2).
 471
 472 config ARCH_MSM7X00A
 473         bool "Qualcomm MSM7X00A"
 474         select GENERIC_TIME
 475         select GENERIC_CLOCKEVENTS
 476         help
 477           Support for Qualcomm MSM7X00A based systems.  This runs on the ARM11
 478           apps processor of the MSM7X00A and depends on a shared memory
 479           interface to the ARM9 modem processor which runs the baseband stack
 480           and controls some vital subsystems (clock and power control, etc).
 481           <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
 482
 483 endchoice
 484
 485 source "arch/arm/mach-clps711x/Kconfig"
 486
 487 source "arch/arm/mach-ep93xx/Kconfig"
 488
 489 source "arch/arm/mach-footbridge/Kconfig"
 490
 491 source "arch/arm/mach-integrator/Kconfig"
 492
 493 source "arch/arm/mach-iop32x/Kconfig"
 494
 495 source "arch/arm/mach-iop33x/Kconfig"
 496
 497 source "arch/arm/mach-iop13xx/Kconfig"
 498
 499 source "arch/arm/mach-ixp4xx/Kconfig"
 500
 501 source "arch/arm/mach-ixp2000/Kconfig"
 502
 503 source "arch/arm/mach-ixp23xx/Kconfig"
 504
 505 source "arch/arm/mach-pxa/Kconfig"
 506
 507 source "arch/arm/mach-sa1100/Kconfig"
 508
 509 source "arch/arm/plat-omap/Kconfig"
 510
 511 source "arch/arm/mach-omap1/Kconfig"
 512
 513 source "arch/arm/mach-omap2/Kconfig"
 514
 515 source "arch/arm/mach-orion5x/Kconfig"
 516
 517 source "arch/arm/plat-s3c24xx/Kconfig"
 518 source "arch/arm/plat-s3c/Kconfig"
 519
 520 if ARCH_S3C2410
 521 source "arch/arm/mach-s3c2400/Kconfig"
 522 source "arch/arm/mach-s3c2410/Kconfig"
 523 source "arch/arm/mach-s3c2412/Kconfig"
 524 source "arch/arm/mach-s3c2440/Kconfig"
 525 source "arch/arm/mach-s3c2442/Kconfig"
 526 source "arch/arm/mach-s3c2443/Kconfig"
 527 endif
 528
 529 source "arch/arm/mach-lh7a40x/Kconfig"
 530
 531 source "arch/arm/mach-imx/Kconfig"
 532
 533 source "arch/arm/mach-h720x/Kconfig"
 534
 535 source "arch/arm/mach-versatile/Kconfig"
 536
 537 source "arch/arm/mach-aaec2000/Kconfig"
 538
 539 source "arch/arm/mach-realview/Kconfig"
 540
 541 source "arch/arm/mach-at91/Kconfig"
 542
 543 source "arch/arm/plat-mxc/Kconfig"
 544
 545 source "arch/arm/mach-netx/Kconfig"
 546
 547 source "arch/arm/mach-ns9xxx/Kconfig"
 548
 549 source "arch/arm/mach-davinci/Kconfig"
 550
 551 source "arch/arm/mach-ks8695/Kconfig"
 552
 553 source "arch/arm/mach-msm/Kconfig"
 554
 555 # Definitions to make life easier
 556 config ARCH_ACORN
 557         bool
 558
 559 config PLAT_IOP
 560         bool
 561
 562 config PLAT_ORION
 563         bool
 564
 565 source arch/arm/mm/Kconfig
 566
 567 config IWMMXT
 568         bool "Enable iWMMXt support"
 569         depends on CPU_XSCALE || CPU_XSC3
 570         default y if PXA27x || PXA3xx
 571         help
 572           Enable support for iWMMXt context switching at run time if
 573           running on a CPU that supports it.
 574
 575 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 576 config XSCALE_PMU
 577         bool
 578         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 579         default y
 580
 581 if !MMU
 582 source "arch/arm/Kconfig-nommu"
 583 endif
 584
 585 endmenu
 586
 587 source "arch/arm/common/Kconfig"
 588
 589 config FORCE_MAX_ZONEORDER
 590         int
 591         depends on SA1111
 592         default "9"
 593
 594 menu "Bus support"
 595
 596 config ARM_AMBA
 597         bool
 598
 599 config ISA
 600         bool
 601         help
 602           Find out whether you have ISA slots on your motherboard.  ISA is the
 603           name of a bus system, i.e. the way the CPU talks to the other stuff
 604           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 605           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 606           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 607
 608 # Select ISA DMA controller support
 609 config ISA_DMA
 610         bool
 611         select ISA_DMA_API
 612
 613 # Select ISA DMA interface
 614 config ISA_DMA_API
 615         bool
 616
 617 config PCI
 618         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 619         help
 620           Find out whether you have a PCI motherboard. PCI is the name of a
 621           bus system, i.e. the way the CPU talks to the other stuff inside
 622           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 623           VESA. If you have PCI, say Y, otherwise N.
 624
 625 config PCI_SYSCALL
 626         def_bool PCI
 627
 628 # Select the host bridge type
 629 config PCI_HOST_VIA82C505
 630         bool
 631         depends on PCI && ARCH_SHARK
 632         default y
 633
 634 config PCI_HOST_ITE8152
 635         bool
 636         depends on PCI && MACH_ARMCORE
 637         default y
 638         select DMABOUNCE
 639
 640 source "drivers/pci/Kconfig"
 641
 642 source "drivers/pcmcia/Kconfig"
 643
 644 endmenu
 645
 646 menu "Kernel Features"
 647
 648 source "kernel/time/Kconfig"
 649
 650 config SMP
 651         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 652         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 653         help
 654           This enables support for systems with more than one CPU. If you have
 655           a system with only one CPU, like most personal computers, say N. If
 656           you have a system with more than one CPU, say Y.
 657
 658           If you say N here, the kernel will run on single and multiprocessor
 659           machines, but will use only one CPU of a multiprocessor machine. If
 660           you say Y here, the kernel will run on many, but not all, single
 661           processor machines. On a single processor machine, the kernel will
 662           run faster if you say N here.
 663
 664           See also <file:Documentation/i386/IO-APIC.txt>,
 665           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 666           <http://www.linuxdoc.org/docs.html#howto>.
 667
 668           If you don't know what to do here, say N.
 669
 670 config NR_CPUS
 671         int "Maximum number of CPUs (2-32)"
 672         range 2 32
 673         depends on SMP
 674         default "4"
 675
 676 config HOTPLUG_CPU
 677         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 678         depends on SMP && HOTPLUG && EXPERIMENTAL
 679         help
 680           Say Y here to experiment with turning CPUs off and on.  CPUs
 681           can be controlled through /sys/devices/system/cpu.
 682
 683 config LOCAL_TIMERS
 684         bool "Use local timer interrupts"
 685         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 686         default y
 687         help
 688           Enable support for local timers on SMP platforms, rather then the
 689           legacy IPI broadcast method.  Local timers allows the system
 690           accounting to be spread across the timer interval, preventing a
 691           "thundering herd" at every timer tick.
 692
 693 config PREEMPT
 694         bool "Preemptible Kernel (EXPERIMENTAL)"
 695         depends on EXPERIMENTAL
 696         help
 697           This option reduces the latency of the kernel when reacting to
 698           real-time or interactive events by allowing a low priority process to
 699           be preempted even if it is in kernel mode executing a system call.
 700           This allows applications to run more reliably even when the system is
 701           under load.
 702
 703           Say Y here if you are building a kernel for a desktop, embedded
 704           or real-time system.  Say N if you are unsure.
 705
 706 config NO_IDLE_HZ
 707         bool "Dynamic tick timer"
 708         depends on !GENERIC_CLOCKEVENTS
 709         help
 710           Select this option if you want to disable continuous timer ticks
 711           and have them programmed to occur as required. This option saves
 712           power as the system can remain in idle state for longer.
 713
 714           By default dynamic tick is disabled during the boot, and can be
 715           manually enabled with:
 716
 717             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 718
 719           Alternatively, if you want dynamic tick automatically enabled
 720           during boot, pass "dyntick=enable" via the kernel command string.
 721
 722           Please note that dynamic tick may affect the accuracy of
 723           timekeeping on some platforms depending on the implementation.
 724           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 725           to have accurate timekeeping with dynamic tick.
 726
 727 config HZ
 728         int
 729         default 128 if ARCH_L7200
 730         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 731         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 732         default AT91_TIMER_HZ if ARCH_AT91
 733         default 100
 734
 735 config AEABI
 736         bool "Use the ARM EABI to compile the kernel"
 737         help
 738           This option allows for the kernel to be compiled using the latest
 739           ARM ABI (aka EABI).  This is only useful if you are using a user
 740           space environment that is also compiled with EABI.
 741
 742           Since there are major incompatibilities between the legacy ABI and
 743           EABI, especially with regard to structure member alignment, this
 744           option also changes the kernel syscall calling convention to
 745           disambiguate both ABIs and allow for backward compatibility support
 746           (selected with CONFIG_OABI_COMPAT).
 747
 748           To use this you need GCC version 4.0.0 or later.
 749
 750 config OABI_COMPAT
 751         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 752         depends on AEABI && EXPERIMENTAL
 753         default y
 754         help
 755           This option preserves the old syscall interface along with the
 756           new (ARM EABI) one. It also provides a compatibility layer to
 757           intercept syscalls that have structure arguments which layout
 758           in memory differs between the legacy ABI and the new ARM EABI
 759           (only for non "thumb" binaries). This option adds a tiny
 760           overhead to all syscalls and produces a slightly larger kernel.
 761           If you know you'll be using only pure EABI user space then you
 762           can say N here. If this option is not selected and you attempt
 763           to execute a legacy ABI binary then the result will be
 764           UNPREDICTABLE (in fact it can be predicted that it won't work
 765           at all). If in doubt say Y.
 766
 767 config ARCH_DISCONTIGMEM_ENABLE
 768         bool
 769         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 770         help
 771           Say Y to support efficient handling of discontiguous physical memory,
 772           for architectures which are either NUMA (Non-Uniform Memory Access)
 773           or have huge holes in the physical address space for other reasons.
 774           See <file:Documentation/vm/numa> for more.
 775
 776 config ARCH_SPARSEMEM_ENABLE
 777         bool
 778
 779 config ARCH_SELECT_MEMORY_MODEL
 780         bool
 781
 782 config NODES_SHIFT
 783         int
 784         default "4" if ARCH_LH7A40X
 785         default "2"
 786         depends on NEED_MULTIPLE_NODES
 787
 788 source "mm/Kconfig"
 789
 790 config LEDS
 791         bool "Timer and CPU usage LEDs"
 792         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 793                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 794                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 795                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 796                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 797                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 798                    ARCH_KS8695 || MACH_RD88F5182
 799         help
 800           If you say Y here, the LEDs on your machine will be used
 801           to provide useful information about your current system status.
 802
 803           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 804           be able to select which LEDs are active using the options below. If
 805           you are compiling a kernel for the EBSA-110 or the LART however, the
 806           red LED will simply flash regularly to indicate that the system is
 807           still functional. It is safe to say Y here if you have a CATS
 808           system, but the driver will do nothing.
 809
 810 config LEDS_TIMER
 811         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 812                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 813                             || MACH_OMAP_PERSEUS2
 814         depends on LEDS
 815         depends on !GENERIC_CLOCKEVENTS
 816         default y if ARCH_EBSA110
 817         help
 818           If you say Y here, one of the system LEDs (the green one on the
 819           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 820           will flash regularly to indicate that the system is still
 821           operational. This is mainly useful to kernel hackers who are
 822           debugging unstable kernels.
 823
 824           The LART uses the same LED for both Timer LED and CPU usage LED
 825           functions. You may choose to use both, but the Timer LED function
 826           will overrule the CPU usage LED.
 827
 828 config LEDS_CPU
 829         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 830                         !ARCH_OMAP) \
 831                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 832                         || MACH_OMAP_PERSEUS2
 833         depends on LEDS
 834         help
 835           If you say Y here, the red LED will be used to give a good real
 836           time indication of CPU usage, by lighting whenever the idle task
 837           is not currently executing.
 838
 839           The LART uses the same LED for both Timer LED and CPU usage LED
 840           functions. You may choose to use both, but the Timer LED function
 841           will overrule the CPU usage LED.
 842
 843 config ALIGNMENT_TRAP
 844         bool
 845         depends on CPU_CP15_MMU
 846         default y if !ARCH_EBSA110
 847         help
 848           ARM processors cannot fetch/store information which is not
 849           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 850           address divisible by 4. On 32-bit ARM processors, these non-aligned
 851           fetch/store instructions will be emulated in software if you say
 852           here, which has a severe performance impact. This is necessary for
 853           correct operation of some network protocols. With an IP-only
 854           configuration it is safe to say N, otherwise say Y.
 855
 856 endmenu
 857
 858 menu "Boot options"
 859
 860 # Compressed boot loader in ROM.  Yes, we really want to ask about
 861 # TEXT and BSS so we preserve their values in the config files.
 862 config ZBOOT_ROM_TEXT
 863         hex "Compressed ROM boot loader base address"
 864         default "0"
 865         help
 866           The physical address at which the ROM-able zImage is to be
 867           placed in the target.  Platforms which normally make use of
 868           ROM-able zImage formats normally set this to a suitable
 869           value in their defconfig file.
 870
 871           If ZBOOT_ROM is not enabled, this has no effect.
 872
 873 config ZBOOT_ROM_BSS
 874         hex "Compressed ROM boot loader BSS address"
 875         default "0"
 876         help
 877           The base address of an area of read/write memory in the target
 878           for the ROM-able zImage which must be available while the
 879           decompressor is running. It must be large enough to hold the
 880           entire decompressed kernel plus an additional 128 KiB.
 881           Platforms which normally make use of ROM-able zImage formats
 882           normally set this to a suitable value in their defconfig file.
 883
 884           If ZBOOT_ROM is not enabled, this has no effect.
 885
 886 config ZBOOT_ROM
 887         bool "Compressed boot loader in ROM/flash"
 888         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 889         help
 890           Say Y here if you intend to execute your compressed kernel image
 891           (zImage) directly from ROM or flash.  If unsure, say N.
 892
 893 config CMDLINE
 894         string "Default kernel command string"
 895         default ""
 896         help
 897           On some architectures (EBSA110 and CATS), there is currently no way
 898           for the boot loader to pass arguments to the kernel. For these
 899           architectures, you should supply some command-line options at build
 900           time by entering them here. As a minimum, you should specify the
 901           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 902
 903 config XIP_KERNEL
 904         bool "Kernel Execute-In-Place from ROM"
 905         depends on !ZBOOT_ROM
 906         help
 907           Execute-In-Place allows the kernel to run from non-volatile storage
 908           directly addressable by the CPU, such as NOR flash. This saves RAM
 909           space since the text section of the kernel is not loaded from flash
 910           to RAM.  Read-write sections, such as the data section and stack,
 911           are still copied to RAM.  The XIP kernel is not compressed since
 912           it has to run directly from flash, so it will take more space to
 913           store it.  The flash address used to link the kernel object files,
 914           and for storing it, is configuration dependent. Therefore, if you
 915           say Y here, you must know the proper physical address where to
 916           store the kernel image depending on your own flash memory usage.
 917
 918           Also note that the make target becomes "make xipImage" rather than
 919           "make zImage" or "make Image".  The final kernel binary to put in
 920           ROM memory will be arch/arm/boot/xipImage.
 921
 922           If unsure, say N.
 923
 924 config XIP_PHYS_ADDR
 925         hex "XIP Kernel Physical Location"
 926         depends on XIP_KERNEL
 927         default "0x00080000"
 928         help
 929           This is the physical address in your flash memory the kernel will
 930           be linked for and stored to.  This address is dependent on your
 931           own flash usage.
 932
 933 config KEXEC
 934         bool "Kexec system call (EXPERIMENTAL)"
 935         depends on EXPERIMENTAL
 936         help
 937           kexec is a system call that implements the ability to shutdown your
 938           current kernel, and to start another kernel.  It is like a reboot
 939           but it is independent of the system firmware.   And like a reboot
 940           you can start any kernel with it, not just Linux.
 941
 942           It is an ongoing process to be certain the hardware in a machine
 943           is properly shutdown, so do not be surprised if this code does not
 944           initially work for you.  It may help to enable device hotplugging
 945           support.
 946
 947 config ATAGS_PROC
 948         bool "Export atags in procfs"
 949         depends on KEXEC
 950         default y
 951         help
 952           Should the atags used to boot the kernel be exported in an "atags"
 953           file in procfs. Useful with kexec.
 954
 955 endmenu
 956
 957 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
 958
 959 menu "CPU Frequency scaling"
 960
 961 source "drivers/cpufreq/Kconfig"
 962
 963 config CPU_FREQ_SA1100
 964         bool
 965         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 966         default y
 967
 968 config CPU_FREQ_SA1110
 969         bool
 970         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 971         default y
 972
 973 config CPU_FREQ_INTEGRATOR
 974         tristate "CPUfreq driver for ARM Integrator CPUs"
 975         depends on ARCH_INTEGRATOR && CPU_FREQ
 976         default y
 977         help
 978           This enables the CPUfreq driver for ARM Integrator CPUs.
 979
 980           For details, take a look at <file:Documentation/cpu-freq>.
 981
 982           If in doubt, say Y.
 983
 984 config CPU_FREQ_IMX
 985         tristate "CPUfreq driver for i.MX CPUs"
 986         depends on ARCH_IMX && CPU_FREQ
 987         default n
 988         help
 989           This enables the CPUfreq driver for i.MX CPUs.
 990
 991           If in doubt, say N.
 992
 993 config CPU_FREQ_PXA
 994         bool
 995         depends on CPU_FREQ && ARCH_PXA && PXA25x
 996         default y
 997         select CPU_FREQ_DEFAULT_GOV_USERSPACE
 998
 999 endmenu
1000
1001 endif
1002
1003 menu "Floating point emulation"
1004
1005 comment "At least one emulation must be selected"
1006
1007 config FPE_NWFPE
1008         bool "NWFPE math emulation"
1009         depends on !AEABI || OABI_COMPAT
1010         ---help---
1011           Say Y to include the NWFPE floating point emulator in the kernel.
1012           This is necessary to run most binaries. Linux does not currently
1013           support floating point hardware so you need to say Y here even if
1014           your machine has an FPA or floating point co-processor podule.
1015
1016           You may say N here if you are going to load the Acorn FPEmulator
1017           early in the bootup.
1018
1019 config FPE_NWFPE_XP
1020         bool "Support extended precision"
1021         depends on FPE_NWFPE
1022         help
1023           Say Y to include 80-bit support in the kernel floating-point
1024           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1025           Note that gcc does not generate 80-bit operations by default,
1026           so in most cases this option only enlarges the size of the
1027           floating point emulator without any good reason.
1028
1029           You almost surely want to say N here.
1030
1031 config FPE_FASTFPE
1032         bool "FastFPE math emulation (EXPERIMENTAL)"
1033         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1034         ---help---
1035           Say Y here to include the FAST floating point emulator in the kernel.
1036           This is an experimental much faster emulator which now also has full
1037           precision for the mantissa.  It does not support any exceptions.
1038           It is very simple, and approximately 3-6 times faster than NWFPE.
1039
1040           It should be sufficient for most programs.  It may be not suitable
1041           for scientific calculations, but you have to check this for yourself.
1042           If you do not feel you need a faster FP emulation you should better
1043           choose NWFPE.
1044
1045 config VFP
1046         bool "VFP-format floating point maths"
1047         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1048         help
1049           Say Y to include VFP support code in the kernel. This is needed
1050           if your hardware includes a VFP unit.
1051
1052           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1053           release notes and additional status information.
1054
1055           Say N if your target does not have VFP hardware.
1056
1057 config VFPv3
1058         bool
1059         depends on VFP
1060         default y if CPU_V7
1061
1062 config NEON
1063         bool "Advanced SIMD (NEON) Extension support"
1064         depends on VFPv3 && CPU_V7
1065         help
1066           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1067           Extension.
1068
1069 endmenu
1070
1071 menu "Userspace binary formats"
1072
1073 source "fs/Kconfig.binfmt"
1074
1075 config ARTHUR
1076         tristate "RISC OS personality"
1077         depends on !AEABI
1078         help
1079           Say Y here to include the kernel code necessary if you want to run
1080           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1081           experimental; if this sounds frightening, say N and sleep in peace.
1082           You can also say M here to compile this support as a module (which
1083           will be called arthur).
1084
1085 endmenu
1086
1087 menu "Power management options"
1088
1089 source "kernel/power/Kconfig"
1090
1091 config ARCH_SUSPEND_POSSIBLE
1092         def_bool y
1093
1094 endmenu
1095
1096 source "net/Kconfig"
1097
1098 menu "Device Drivers"
1099
1100 source "drivers/base/Kconfig"
1101
1102 source "drivers/connector/Kconfig"
1103
1104 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1105 source "drivers/mtd/Kconfig"
1106 endif
1107
1108 source "drivers/parport/Kconfig"
1109
1110 source "drivers/pnp/Kconfig"
1111
1112 source "drivers/block/Kconfig"
1113
1114 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1115
1116 source "drivers/misc/Kconfig"
1117
1118 source "drivers/ide/Kconfig"
1119
1120 source "drivers/scsi/Kconfig"
1121
1122 source "drivers/ata/Kconfig"
1123
1124 source "drivers/md/Kconfig"
1125
1126 source "drivers/message/fusion/Kconfig"
1127
1128 source "drivers/ieee1394/Kconfig"
1129
1130 source "drivers/message/i2o/Kconfig"
1131
1132 source "drivers/net/Kconfig"
1133
1134 source "drivers/isdn/Kconfig"
1135
1136 # input before char - char/joystick depends on it. As does USB.
1137
1138 source "drivers/input/Kconfig"
1139
1140 source "drivers/char/Kconfig"
1141
1142 source "drivers/i2c/Kconfig"
1143
1144 source "drivers/spi/Kconfig"
1145
1146 source "drivers/gpio/Kconfig"
1147
1148 source "drivers/w1/Kconfig"
1149
1150 source "drivers/power/Kconfig"
1151
1152 source "drivers/hwmon/Kconfig"
1153
1154 source "drivers/watchdog/Kconfig"
1155
1156 source "drivers/ssb/Kconfig"
1157
1158 #source "drivers/l3/Kconfig"
1159
1160 source "drivers/mfd/Kconfig"
1161
1162 source "drivers/media/Kconfig"
1163
1164 source "drivers/video/Kconfig"
1165
1166 source "sound/Kconfig"
1167
1168 source "drivers/hid/Kconfig"
1169
1170 source "drivers/usb/Kconfig"
1171
1172 source "drivers/mmc/Kconfig"
1173
1174 source "drivers/leds/Kconfig"
1175
1176 source "drivers/rtc/Kconfig"
1177
1178 source "drivers/dma/Kconfig"
1179
1180 source "drivers/dca/Kconfig"
1181
1182 source "drivers/uio/Kconfig"
1183
1184 endmenu
1185
1186 source "fs/Kconfig"
1187
1188 source "arch/arm/Kconfig.debug"
1189
1190 source "security/Kconfig"
1191
1192 source "crypto/Kconfig"
1193
1194 source "lib/Kconfig"