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 RTC_LIB
  12         select SYS_SUPPORTS_APM_EMULATION
  13         select HAVE_OPROFILE
  14         select HAVE_KPROBES if (!XIP_KERNEL)
  15         help
  16           The ARM series is a line of low-power-consumption RISC chip designs
  17           licensed by ARM Ltd and targeted at embedded applications and
  18           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  19           manufactured, but legacy ARM-based PC hardware remains popular in
  20           Europe.  There is an ARM Linux project with a web page at
  21           <http://www.arm.linux.org.uk/>.
  22
  23 config SYS_SUPPORTS_APM_EMULATION
  24         bool
  25
  26 config GENERIC_GPIO
  27         bool
  28         default n
  29
  30 config GENERIC_TIME
  31         bool
  32         default n
  33
  34 config GENERIC_CLOCKEVENTS
  35         bool
  36         default n
  37
  38 config GENERIC_CLOCKEVENTS_BROADCAST
  39         bool
  40         depends on GENERIC_CLOCKEVENTS
  41         default y if SMP && !LOCAL_TIMERS
  42
  43 config MMU
  44         bool
  45         default y
  46
  47 config NO_IOPORT
  48         bool
  49         default n
  50
  51 config EISA
  52         bool
  53         ---help---
  54           The Extended Industry Standard Architecture (EISA) bus was
  55           developed as an open alternative to the IBM MicroChannel bus.
  56
  57           The EISA bus provided some of the features of the IBM MicroChannel
  58           bus while maintaining backward compatibility with cards made for
  59           the older ISA bus.  The EISA bus saw limited use between 1988 and
  60           1995 when it was made obsolete by the PCI bus.
  61
  62           Say Y here if you are building a kernel for an EISA-based machine.
  63
  64           Otherwise, say N.
  65
  66 config SBUS
  67         bool
  68
  69 config MCA
  70         bool
  71         help
  72           MicroChannel Architecture is found in some IBM PS/2 machines and
  73           laptops.  It is a bus system similar to PCI or ISA. See
  74           <file:Documentation/mca.txt> (and especially the web page given
  75           there) before attempting to build an MCA bus kernel.
  76
  77 config GENERIC_HARDIRQS
  78         bool
  79         default y
  80
  81 config STACKTRACE_SUPPORT
  82         bool
  83         default y
  84
  85 config LOCKDEP_SUPPORT
  86         bool
  87         default y
  88
  89 config TRACE_IRQFLAGS_SUPPORT
  90         bool
  91         default y
  92
  93 config HARDIRQS_SW_RESEND
  94         bool
  95         default y
  96
  97 config GENERIC_IRQ_PROBE
  98         bool
  99         default y
 100
 101 config GENERIC_LOCKBREAK
 102         bool
 103         default y
 104         depends on SMP && PREEMPT
 105
 106 config RWSEM_GENERIC_SPINLOCK
 107         bool
 108         default y
 109
 110 config RWSEM_XCHGADD_ALGORITHM
 111         bool
 112
 113 config ARCH_HAS_ILOG2_U32
 114         bool
 115         default n
 116
 117 config ARCH_HAS_ILOG2_U64
 118         bool
 119         default n
 120
 121 config GENERIC_HWEIGHT
 122         bool
 123         default y
 124
 125 config GENERIC_CALIBRATE_DELAY
 126         bool
 127         default y
 128
 129 config ARCH_SUPPORTS_AOUT
 130         def_bool y
 131
 132 config ARCH_MAY_HAVE_PC_FDC
 133         bool
 134
 135 config ZONE_DMA
 136         bool
 137         default y
 138
 139 config GENERIC_ISA_DMA
 140         bool
 141
 142 config FIQ
 143         bool
 144
 145 config ARCH_MTD_XIP
 146         bool
 147
 148 if OPROFILE
 149
 150 config OPROFILE_ARMV6
 151         def_bool y
 152         depends on CPU_V6 && !SMP
 153         select OPROFILE_ARM11_CORE
 154
 155 config OPROFILE_MPCORE
 156         def_bool y
 157         depends on CPU_V6 && SMP
 158         select OPROFILE_ARM11_CORE
 159
 160 config OPROFILE_ARM11_CORE
 161         bool
 162
 163 endif
 164
 165 config VECTORS_BASE
 166         hex
 167         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 168         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 169         default 0x00000000
 170         help
 171           The base address of exception vectors.
 172
 173 source "init/Kconfig"
 174
 175 menu "System Type"
 176
 177 choice
 178         prompt "ARM system type"
 179         default ARCH_VERSATILE
 180
 181 config ARCH_AAEC2000
 182         bool "Agilent AAEC-2000 based"
 183         select ARM_AMBA
 184         help
 185           This enables support for systems based on the Agilent AAEC-2000
 186
 187 config ARCH_INTEGRATOR
 188         bool "ARM Ltd. Integrator family"
 189         select ARM_AMBA
 190         select ICST525
 191         help
 192           Support for ARM's Integrator platform.
 193
 194 config ARCH_REALVIEW
 195         bool "ARM Ltd. RealView family"
 196         select ARM_AMBA
 197         select ICST307
 198         select GENERIC_TIME
 199         select GENERIC_CLOCKEVENTS
 200         help
 201           This enables support for ARM Ltd RealView boards.
 202
 203 config ARCH_VERSATILE
 204         bool "ARM Ltd. Versatile family"
 205         select ARM_AMBA
 206         select ARM_VIC
 207         select ICST307
 208         select GENERIC_TIME
 209         select GENERIC_CLOCKEVENTS
 210         help
 211           This enables support for ARM Ltd Versatile board.
 212
 213 config ARCH_AT91
 214         bool "Atmel AT91"
 215         select GENERIC_GPIO
 216         help
 217           This enables support for systems based on the Atmel AT91RM9200,
 218           AT91SAM9 and AT91CAP9 processors.
 219
 220 config ARCH_CLPS7500
 221         bool "Cirrus CL-PS7500FE"
 222         select TIMER_ACORN
 223         select ISA
 224         select NO_IOPORT
 225         help
 226           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 227
 228 config ARCH_CLPS711X
 229         bool "Cirrus Logic CLPS711x/EP721x-based"
 230         help
 231           Support for Cirrus Logic 711x/721x based boards.
 232
 233 config ARCH_CO285
 234         bool "Co-EBSA285"
 235         select FOOTBRIDGE
 236         select FOOTBRIDGE_ADDIN
 237         help
 238           Support for Intel's EBSA285 companion chip.
 239
 240 config ARCH_EBSA110
 241         bool "EBSA-110"
 242         select ISA
 243         select NO_IOPORT
 244         help
 245           This is an evaluation board for the StrongARM processor available
 246           from Digital. It has limited hardware on-board, including an
 247           Ethernet interface, two PCMCIA sockets, two serial ports and a
 248           parallel port.
 249
 250 config ARCH_EP93XX
 251         bool "EP93xx-based"
 252         select ARM_AMBA
 253         select ARM_VIC
 254         select GENERIC_GPIO
 255         help
 256           This enables support for the Cirrus EP93xx series of CPUs.
 257
 258 config ARCH_FOOTBRIDGE
 259         bool "FootBridge"
 260         select FOOTBRIDGE
 261         help
 262           Support for systems based on the DC21285 companion chip
 263           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 264
 265 config ARCH_NETX
 266         bool "Hilscher NetX based"
 267         select ARM_VIC
 268         help
 269           This enables support for systems based on the Hilscher NetX Soc
 270
 271 config ARCH_H720X
 272         bool "Hynix HMS720x-based"
 273         select ISA_DMA_API
 274         help
 275           This enables support for systems based on the Hynix HMS720x
 276
 277 config ARCH_IMX
 278         bool "IMX"
 279         select GENERIC_GPIO
 280         select GENERIC_TIME
 281         select GENERIC_CLOCKEVENTS
 282         help
 283           Support for Motorola's i.MX family of processors (MX1, MXL).
 284
 285 config ARCH_IOP13XX
 286         bool "IOP13xx-based"
 287         depends on MMU
 288         select PLAT_IOP
 289         select PCI
 290         select ARCH_SUPPORTS_MSI
 291         help
 292           Support for Intel's IOP13XX (XScale) family of processors.
 293
 294 config ARCH_IOP32X
 295         bool "IOP32x-based"
 296         depends on MMU
 297         select PLAT_IOP
 298         select PCI
 299         help
 300           Support for Intel's 80219 and IOP32X (XScale) family of
 301           processors.
 302
 303 config ARCH_IOP33X
 304         bool "IOP33x-based"
 305         depends on MMU
 306         select PLAT_IOP
 307         select PCI
 308         help
 309           Support for Intel's IOP33X (XScale) family of processors.
 310
 311 config ARCH_IXP23XX
 312         bool "IXP23XX-based"
 313         depends on MMU
 314         select PCI
 315         help
 316           Support for Intel's IXP23xx (XScale) family of processors.
 317
 318 config ARCH_IXP2000
 319         bool "IXP2400/2800-based"
 320         depends on MMU
 321         select PCI
 322         help
 323           Support for Intel's IXP2400/2800 (XScale) family of processors.
 324
 325 config ARCH_IXP4XX
 326         bool "IXP4xx-based"
 327         depends on MMU
 328         select GENERIC_GPIO
 329         select GENERIC_TIME
 330         select GENERIC_CLOCKEVENTS
 331         help
 332           Support for Intel's IXP4XX (XScale) family of processors.
 333
 334 config ARCH_L7200
 335         bool "LinkUp-L7200"
 336         select FIQ
 337         help
 338           Say Y here if you intend to run this kernel on a LinkUp Systems
 339           L7200 Software Development Board which uses an ARM720T processor.
 340           Information on this board can be obtained at:
 341
 342           <http://www.linkupsys.com/>
 343
 344           If you have any questions or comments about the Linux kernel port
 345           to this board, send e-mail to <sjhill@cotw.com>.
 346
 347 config ARCH_KS8695
 348         bool "Micrel/Kendin KS8695"
 349         select GENERIC_GPIO
 350         help
 351           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 352           System-on-Chip devices.
 353
 354 config ARCH_NS9XXX
 355         bool "NetSilicon NS9xxx"
 356         select GENERIC_GPIO
 357         select GENERIC_TIME
 358         select GENERIC_CLOCKEVENTS
 359         help
 360           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 361           System.
 362
 363           <http://www.digi.com/products/microprocessors/index.jsp>
 364
 365 config ARCH_MXC
 366         bool "Freescale MXC/iMX-based"
 367         select ARCH_MTD_XIP
 368         help
 369           Support for Freescale MXC/iMX-based family of processors
 370
 371 config ARCH_ORION
 372         bool "Marvell Orion"
 373         depends on MMU
 374         select PCI
 375         select GENERIC_GPIO
 376         select GENERIC_TIME
 377         select GENERIC_CLOCKEVENTS
 378         help
 379           Support for Marvell Orion System on Chip family.
 380
 381 config ARCH_PNX4008
 382         bool "Philips Nexperia PNX4008 Mobile"
 383         help
 384           This enables support for Philips PNX4008 mobile platform.
 385
 386 config ARCH_PXA
 387         bool "PXA2xx/PXA3xx-based"
 388         depends on MMU
 389         select ARCH_MTD_XIP
 390         select GENERIC_GPIO
 391         select HAVE_GPIO_LIB
 392         select GENERIC_TIME
 393         select GENERIC_CLOCKEVENTS
 394         select TICK_ONESHOT
 395         help
 396           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 397
 398 config ARCH_RPC
 399         bool "RiscPC"
 400         select ARCH_ACORN
 401         select FIQ
 402         select TIMER_ACORN
 403         select ARCH_MAY_HAVE_PC_FDC
 404         select ISA_DMA_API
 405         select NO_IOPORT
 406         help
 407           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 408           CD-ROM interface, serial and parallel port, and the floppy drive.
 409
 410 config ARCH_SA1100
 411         bool "SA1100-based"
 412         select ISA
 413         select ARCH_DISCONTIGMEM_ENABLE
 414         select ARCH_MTD_XIP
 415         select GENERIC_GPIO
 416         select GENERIC_TIME
 417         help
 418           Support for StrongARM 11x0 based boards.
 419
 420 config ARCH_S3C2410
 421         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 422         select GENERIC_GPIO
 423         help
 424           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 425           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 426           the Samsung SMDK2410 development board (and derivatives).
 427
 428 config ARCH_SHARK
 429         bool "Shark"
 430         select ISA
 431         select ISA_DMA
 432         select PCI
 433         help
 434           Support for the StrongARM based Digital DNARD machine, also known
 435           as "Shark" (<http://www.shark-linux.de/shark.html>).
 436
 437 config ARCH_LH7A40X
 438         bool "Sharp LH7A40X"
 439         help
 440           Say Y here for systems based on one of the Sharp LH7A40X
 441           System on a Chip processors.  These CPUs include an ARM922T
 442           core with a wide array of integrated devices for
 443           hand-held and low-power applications.
 444
 445 config ARCH_DAVINCI
 446         bool "TI DaVinci"
 447         select GENERIC_TIME
 448         select GENERIC_CLOCKEVENTS
 449         select GENERIC_GPIO
 450         help
 451           Support for TI's DaVinci platform.
 452
 453 config ARCH_OMAP
 454         bool "TI OMAP"
 455         select GENERIC_GPIO
 456         select GENERIC_TIME
 457         help
 458           Support for TI's OMAP platform (OMAP1 and OMAP2).
 459
 460 config ARCH_MSM7X00A
 461         bool "Qualcomm MSM7X00A"
 462         select GENERIC_TIME
 463         select GENERIC_CLOCKEVENTS
 464         help
 465           Support for Qualcomm MSM7X00A based systems.  This runs on the ARM11
 466           apps processor of the MSM7X00A and depends on a shared memory
 467           interface to the ARM9 modem processor which runs the baseband stack
 468           and controls some vital subsystems (clock and power control, etc).
 469           <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
 470
 471 endchoice
 472
 473 source "arch/arm/mach-clps711x/Kconfig"
 474
 475 source "arch/arm/mach-ep93xx/Kconfig"
 476
 477 source "arch/arm/mach-footbridge/Kconfig"
 478
 479 source "arch/arm/mach-integrator/Kconfig"
 480
 481 source "arch/arm/mach-iop32x/Kconfig"
 482
 483 source "arch/arm/mach-iop33x/Kconfig"
 484
 485 source "arch/arm/mach-iop13xx/Kconfig"
 486
 487 source "arch/arm/mach-ixp4xx/Kconfig"
 488
 489 source "arch/arm/mach-ixp2000/Kconfig"
 490
 491 source "arch/arm/mach-ixp23xx/Kconfig"
 492
 493 source "arch/arm/mach-pxa/Kconfig"
 494
 495 source "arch/arm/mach-sa1100/Kconfig"
 496
 497 source "arch/arm/plat-omap/Kconfig"
 498
 499 source "arch/arm/mach-omap1/Kconfig"
 500
 501 source "arch/arm/mach-omap2/Kconfig"
 502
 503 source "arch/arm/mach-orion/Kconfig"
 504
 505 source "arch/arm/plat-s3c24xx/Kconfig"
 506 source "arch/arm/plat-s3c/Kconfig"
 507
 508 if ARCH_S3C2410
 509 source "arch/arm/mach-s3c2400/Kconfig"
 510 source "arch/arm/mach-s3c2410/Kconfig"
 511 source "arch/arm/mach-s3c2412/Kconfig"
 512 source "arch/arm/mach-s3c2440/Kconfig"
 513 source "arch/arm/mach-s3c2442/Kconfig"
 514 source "arch/arm/mach-s3c2443/Kconfig"
 515 endif
 516
 517 source "arch/arm/mach-lh7a40x/Kconfig"
 518
 519 source "arch/arm/mach-imx/Kconfig"
 520
 521 source "arch/arm/mach-h720x/Kconfig"
 522
 523 source "arch/arm/mach-versatile/Kconfig"
 524
 525 source "arch/arm/mach-aaec2000/Kconfig"
 526
 527 source "arch/arm/mach-realview/Kconfig"
 528
 529 source "arch/arm/mach-at91/Kconfig"
 530
 531 source "arch/arm/plat-mxc/Kconfig"
 532
 533 source "arch/arm/mach-netx/Kconfig"
 534
 535 source "arch/arm/mach-ns9xxx/Kconfig"
 536
 537 source "arch/arm/mach-davinci/Kconfig"
 538
 539 source "arch/arm/mach-ks8695/Kconfig"
 540
 541 source "arch/arm/mach-msm/Kconfig"
 542
 543 # Definitions to make life easier
 544 config ARCH_ACORN
 545         bool
 546
 547 config PLAT_IOP
 548         bool
 549
 550 source arch/arm/mm/Kconfig
 551
 552 config IWMMXT
 553         bool "Enable iWMMXt support"
 554         depends on CPU_XSCALE || CPU_XSC3
 555         default y if PXA27x || PXA3xx
 556         help
 557           Enable support for iWMMXt context switching at run time if
 558           running on a CPU that supports it.
 559
 560 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 561 config XSCALE_PMU
 562         bool
 563         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 564         default y
 565
 566 if !MMU
 567 source "arch/arm/Kconfig-nommu"
 568 endif
 569
 570 endmenu
 571
 572 source "arch/arm/common/Kconfig"
 573
 574 config FORCE_MAX_ZONEORDER
 575         int
 576         depends on SA1111
 577         default "9"
 578
 579 menu "Bus support"
 580
 581 config ARM_AMBA
 582         bool
 583
 584 config ISA
 585         bool
 586         help
 587           Find out whether you have ISA slots on your motherboard.  ISA is the
 588           name of a bus system, i.e. the way the CPU talks to the other stuff
 589           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 590           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 591           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 592
 593 # Select ISA DMA controller support
 594 config ISA_DMA
 595         bool
 596         select ISA_DMA_API
 597
 598 # Select ISA DMA interface
 599 config ISA_DMA_API
 600         bool
 601
 602 config PCI
 603         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 604         help
 605           Find out whether you have a PCI motherboard. PCI is the name of a
 606           bus system, i.e. the way the CPU talks to the other stuff inside
 607           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 608           VESA. If you have PCI, say Y, otherwise N.
 609
 610 config PCI_SYSCALL
 611         def_bool PCI
 612
 613 # Select the host bridge type
 614 config PCI_HOST_VIA82C505
 615         bool
 616         depends on PCI && ARCH_SHARK
 617         default y
 618
 619 config PCI_HOST_ITE8152
 620         bool
 621         depends on PCI && MACH_ARMCORE
 622         default y
 623         select DMABOUNCE
 624
 625 source "drivers/pci/Kconfig"
 626
 627 source "drivers/pcmcia/Kconfig"
 628
 629 endmenu
 630
 631 menu "Kernel Features"
 632
 633 source "kernel/time/Kconfig"
 634
 635 config SMP
 636         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 637         depends on EXPERIMENTAL && REALVIEW_EB_ARM11MP
 638         help
 639           This enables support for systems with more than one CPU. If you have
 640           a system with only one CPU, like most personal computers, say N. If
 641           you have a system with more than one CPU, say Y.
 642
 643           If you say N here, the kernel will run on single and multiprocessor
 644           machines, but will use only one CPU of a multiprocessor machine. If
 645           you say Y here, the kernel will run on many, but not all, single
 646           processor machines. On a single processor machine, the kernel will
 647           run faster if you say N here.
 648
 649           See also <file:Documentation/i386/IO-APIC.txt>,
 650           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 651           <http://www.linuxdoc.org/docs.html#howto>.
 652
 653           If you don't know what to do here, say N.
 654
 655 config NR_CPUS
 656         int "Maximum number of CPUs (2-32)"
 657         range 2 32
 658         depends on SMP
 659         default "4"
 660
 661 config HOTPLUG_CPU
 662         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 663         depends on SMP && HOTPLUG && EXPERIMENTAL
 664         help
 665           Say Y here to experiment with turning CPUs off and on.  CPUs
 666           can be controlled through /sys/devices/system/cpu.
 667
 668 config LOCAL_TIMERS
 669         bool "Use local timer interrupts"
 670         depends on SMP && REALVIEW_EB_ARM11MP
 671         default y
 672         help
 673           Enable support for local timers on SMP platforms, rather then the
 674           legacy IPI broadcast method.  Local timers allows the system
 675           accounting to be spread across the timer interval, preventing a
 676           "thundering herd" at every timer tick.
 677
 678 config PREEMPT
 679         bool "Preemptible Kernel (EXPERIMENTAL)"
 680         depends on EXPERIMENTAL
 681         help
 682           This option reduces the latency of the kernel when reacting to
 683           real-time or interactive events by allowing a low priority process to
 684           be preempted even if it is in kernel mode executing a system call.
 685           This allows applications to run more reliably even when the system is
 686           under load.
 687
 688           Say Y here if you are building a kernel for a desktop, embedded
 689           or real-time system.  Say N if you are unsure.
 690
 691 config NO_IDLE_HZ
 692         bool "Dynamic tick timer"
 693         depends on !GENERIC_CLOCKEVENTS
 694         help
 695           Select this option if you want to disable continuous timer ticks
 696           and have them programmed to occur as required. This option saves
 697           power as the system can remain in idle state for longer.
 698
 699           By default dynamic tick is disabled during the boot, and can be
 700           manually enabled with:
 701
 702             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 703
 704           Alternatively, if you want dynamic tick automatically enabled
 705           during boot, pass "dyntick=enable" via the kernel command string.
 706
 707           Please note that dynamic tick may affect the accuracy of
 708           timekeeping on some platforms depending on the implementation.
 709           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 710           to have accurate timekeeping with dynamic tick.
 711
 712 config HZ
 713         int
 714         default 128 if ARCH_L7200
 715         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 716         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 717         default AT91_TIMER_HZ if ARCH_AT91
 718         default 100
 719
 720 config AEABI
 721         bool "Use the ARM EABI to compile the kernel"
 722         help
 723           This option allows for the kernel to be compiled using the latest
 724           ARM ABI (aka EABI).  This is only useful if you are using a user
 725           space environment that is also compiled with EABI.
 726
 727           Since there are major incompatibilities between the legacy ABI and
 728           EABI, especially with regard to structure member alignment, this
 729           option also changes the kernel syscall calling convention to
 730           disambiguate both ABIs and allow for backward compatibility support
 731           (selected with CONFIG_OABI_COMPAT).
 732
 733           To use this you need GCC version 4.0.0 or later.
 734
 735 config OABI_COMPAT
 736         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 737         depends on AEABI && EXPERIMENTAL
 738         default y
 739         help
 740           This option preserves the old syscall interface along with the
 741           new (ARM EABI) one. It also provides a compatibility layer to
 742           intercept syscalls that have structure arguments which layout
 743           in memory differs between the legacy ABI and the new ARM EABI
 744           (only for non "thumb" binaries). This option adds a tiny
 745           overhead to all syscalls and produces a slightly larger kernel.
 746           If you know you'll be using only pure EABI user space then you
 747           can say N here. If this option is not selected and you attempt
 748           to execute a legacy ABI binary then the result will be
 749           UNPREDICTABLE (in fact it can be predicted that it won't work
 750           at all). If in doubt say Y.
 751
 752 config ARCH_DISCONTIGMEM_ENABLE
 753         bool
 754         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 755         help
 756           Say Y to support efficient handling of discontiguous physical memory,
 757           for architectures which are either NUMA (Non-Uniform Memory Access)
 758           or have huge holes in the physical address space for other reasons.
 759           See <file:Documentation/vm/numa> for more.
 760
 761 config NODES_SHIFT
 762         int
 763         default "4" if ARCH_LH7A40X
 764         default "2"
 765         depends on NEED_MULTIPLE_NODES
 766
 767 source "mm/Kconfig"
 768
 769 config LEDS
 770         bool "Timer and CPU usage LEDs"
 771         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 772                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 773                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 774                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 775                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 776                    ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
 777                    ARCH_KS8695 || MACH_RD88F5182
 778         help
 779           If you say Y here, the LEDs on your machine will be used
 780           to provide useful information about your current system status.
 781
 782           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 783           be able to select which LEDs are active using the options below. If
 784           you are compiling a kernel for the EBSA-110 or the LART however, the
 785           red LED will simply flash regularly to indicate that the system is
 786           still functional. It is safe to say Y here if you have a CATS
 787           system, but the driver will do nothing.
 788
 789 config LEDS_TIMER
 790         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 791                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 792                             || MACH_OMAP_PERSEUS2
 793         depends on LEDS
 794         depends on !GENERIC_CLOCKEVENTS
 795         default y if ARCH_EBSA110
 796         help
 797           If you say Y here, one of the system LEDs (the green one on the
 798           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 799           will flash regularly to indicate that the system is still
 800           operational. This is mainly useful to kernel hackers who are
 801           debugging unstable kernels.
 802
 803           The LART uses the same LED for both Timer LED and CPU usage LED
 804           functions. You may choose to use both, but the Timer LED function
 805           will overrule the CPU usage LED.
 806
 807 config LEDS_CPU
 808         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 809                         !ARCH_OMAP) \
 810                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 811                         || MACH_OMAP_PERSEUS2
 812         depends on LEDS
 813         help
 814           If you say Y here, the red LED will be used to give a good real
 815           time indication of CPU usage, by lighting whenever the idle task
 816           is not currently executing.
 817
 818           The LART uses the same LED for both Timer LED and CPU usage LED
 819           functions. You may choose to use both, but the Timer LED function
 820           will overrule the CPU usage LED.
 821
 822 config ALIGNMENT_TRAP
 823         bool
 824         depends on CPU_CP15_MMU
 825         default y if !ARCH_EBSA110
 826         help
 827           ARM processors cannot fetch/store information which is not
 828           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 829           address divisible by 4. On 32-bit ARM processors, these non-aligned
 830           fetch/store instructions will be emulated in software if you say
 831           here, which has a severe performance impact. This is necessary for
 832           correct operation of some network protocols. With an IP-only
 833           configuration it is safe to say N, otherwise say Y.
 834
 835 endmenu
 836
 837 menu "Boot options"
 838
 839 # Compressed boot loader in ROM.  Yes, we really want to ask about
 840 # TEXT and BSS so we preserve their values in the config files.
 841 config ZBOOT_ROM_TEXT
 842         hex "Compressed ROM boot loader base address"
 843         default "0"
 844         help
 845           The physical address at which the ROM-able zImage is to be
 846           placed in the target.  Platforms which normally make use of
 847           ROM-able zImage formats normally set this to a suitable
 848           value in their defconfig file.
 849
 850           If ZBOOT_ROM is not enabled, this has no effect.
 851
 852 config ZBOOT_ROM_BSS
 853         hex "Compressed ROM boot loader BSS address"
 854         default "0"
 855         help
 856           The base address of an area of read/write memory in the target
 857           for the ROM-able zImage which must be available while the
 858           decompressor is running. It must be large enough to hold the
 859           entire decompressed kernel plus an additional 128 KiB.
 860           Platforms which normally make use of ROM-able zImage formats
 861           normally set this to a suitable value in their defconfig file.
 862
 863           If ZBOOT_ROM is not enabled, this has no effect.
 864
 865 config ZBOOT_ROM
 866         bool "Compressed boot loader in ROM/flash"
 867         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 868         help
 869           Say Y here if you intend to execute your compressed kernel image
 870           (zImage) directly from ROM or flash.  If unsure, say N.
 871
 872 config CMDLINE
 873         string "Default kernel command string"
 874         default ""
 875         help
 876           On some architectures (EBSA110 and CATS), there is currently no way
 877           for the boot loader to pass arguments to the kernel. For these
 878           architectures, you should supply some command-line options at build
 879           time by entering them here. As a minimum, you should specify the
 880           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 881
 882 config XIP_KERNEL
 883         bool "Kernel Execute-In-Place from ROM"
 884         depends on !ZBOOT_ROM
 885         help
 886           Execute-In-Place allows the kernel to run from non-volatile storage
 887           directly addressable by the CPU, such as NOR flash. This saves RAM
 888           space since the text section of the kernel is not loaded from flash
 889           to RAM.  Read-write sections, such as the data section and stack,
 890           are still copied to RAM.  The XIP kernel is not compressed since
 891           it has to run directly from flash, so it will take more space to
 892           store it.  The flash address used to link the kernel object files,
 893           and for storing it, is configuration dependent. Therefore, if you
 894           say Y here, you must know the proper physical address where to
 895           store the kernel image depending on your own flash memory usage.
 896
 897           Also note that the make target becomes "make xipImage" rather than
 898           "make zImage" or "make Image".  The final kernel binary to put in
 899           ROM memory will be arch/arm/boot/xipImage.
 900
 901           If unsure, say N.
 902
 903 config XIP_PHYS_ADDR
 904         hex "XIP Kernel Physical Location"
 905         depends on XIP_KERNEL
 906         default "0x00080000"
 907         help
 908           This is the physical address in your flash memory the kernel will
 909           be linked for and stored to.  This address is dependent on your
 910           own flash usage.
 911
 912 config KEXEC
 913         bool "Kexec system call (EXPERIMENTAL)"
 914         depends on EXPERIMENTAL
 915         help
 916           kexec is a system call that implements the ability to shutdown your
 917           current kernel, and to start another kernel.  It is like a reboot
 918           but it is independent of the system firmware.   And like a reboot
 919           you can start any kernel with it, not just Linux.
 920
 921           It is an ongoing process to be certain the hardware in a machine
 922           is properly shutdown, so do not be surprised if this code does not
 923           initially work for you.  It may help to enable device hotplugging
 924           support.
 925
 926 config ATAGS_PROC
 927         bool "Export atags in procfs"
 928         default n
 929         help
 930           Should the atags used to boot the kernel be exported in an "atags"
 931           file in procfs. Useful with kexec.
 932
 933 endmenu
 934
 935 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
 936
 937 menu "CPU Frequency scaling"
 938
 939 source "drivers/cpufreq/Kconfig"
 940
 941 config CPU_FREQ_SA1100
 942         bool
 943         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 944         default y
 945
 946 config CPU_FREQ_SA1110
 947         bool
 948         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 949         default y
 950
 951 config CPU_FREQ_INTEGRATOR
 952         tristate "CPUfreq driver for ARM Integrator CPUs"
 953         depends on ARCH_INTEGRATOR && CPU_FREQ
 954         default y
 955         help
 956           This enables the CPUfreq driver for ARM Integrator CPUs.
 957
 958           For details, take a look at <file:Documentation/cpu-freq>.
 959
 960           If in doubt, say Y.
 961
 962 config CPU_FREQ_IMX
 963         tristate "CPUfreq driver for i.MX CPUs"
 964         depends on ARCH_IMX && CPU_FREQ
 965         default n
 966         help
 967           This enables the CPUfreq driver for i.MX CPUs.
 968
 969           If in doubt, say N.
 970
 971 config CPU_FREQ_PXA
 972         bool
 973         depends on CPU_FREQ && ARCH_PXA && PXA25x
 974         default y
 975         select CPU_FREQ_DEFAULT_GOV_USERSPACE
 976
 977 endmenu
 978
 979 endif
 980
 981 menu "Floating point emulation"
 982
 983 comment "At least one emulation must be selected"
 984
 985 config FPE_NWFPE
 986         bool "NWFPE math emulation"
 987         depends on !AEABI || OABI_COMPAT
 988         ---help---
 989           Say Y to include the NWFPE floating point emulator in the kernel.
 990           This is necessary to run most binaries. Linux does not currently
 991           support floating point hardware so you need to say Y here even if
 992           your machine has an FPA or floating point co-processor podule.
 993
 994           You may say N here if you are going to load the Acorn FPEmulator
 995           early in the bootup.
 996
 997 config FPE_NWFPE_XP
 998         bool "Support extended precision"
 999         depends on FPE_NWFPE
1000         help
1001           Say Y to include 80-bit support in the kernel floating-point
1002           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1003           Note that gcc does not generate 80-bit operations by default,
1004           so in most cases this option only enlarges the size of the
1005           floating point emulator without any good reason.
1006
1007           You almost surely want to say N here.
1008
1009 config FPE_FASTFPE
1010         bool "FastFPE math emulation (EXPERIMENTAL)"
1011         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1012         ---help---
1013           Say Y here to include the FAST floating point emulator in the kernel.
1014           This is an experimental much faster emulator which now also has full
1015           precision for the mantissa.  It does not support any exceptions.
1016           It is very simple, and approximately 3-6 times faster than NWFPE.
1017
1018           It should be sufficient for most programs.  It may be not suitable
1019           for scientific calculations, but you have to check this for yourself.
1020           If you do not feel you need a faster FP emulation you should better
1021           choose NWFPE.
1022
1023 config VFP
1024         bool "VFP-format floating point maths"
1025         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1026         help
1027           Say Y to include VFP support code in the kernel. This is needed
1028           if your hardware includes a VFP unit.
1029
1030           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1031           release notes and additional status information.
1032
1033           Say N if your target does not have VFP hardware.
1034
1035 config VFPv3
1036         bool
1037         depends on VFP
1038         default y if CPU_V7
1039
1040 config NEON
1041         bool "Advanced SIMD (NEON) Extension support"
1042         depends on VFPv3 && CPU_V7
1043         help
1044           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1045           Extension.
1046
1047 endmenu
1048
1049 menu "Userspace binary formats"
1050
1051 source "fs/Kconfig.binfmt"
1052
1053 config ARTHUR
1054         tristate "RISC OS personality"
1055         depends on !AEABI
1056         help
1057           Say Y here to include the kernel code necessary if you want to run
1058           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1059           experimental; if this sounds frightening, say N and sleep in peace.
1060           You can also say M here to compile this support as a module (which
1061           will be called arthur).
1062
1063 endmenu
1064
1065 menu "Power management options"
1066
1067 source "kernel/power/Kconfig"
1068
1069 config ARCH_SUSPEND_POSSIBLE
1070         def_bool y
1071
1072 endmenu
1073
1074 source "net/Kconfig"
1075
1076 menu "Device Drivers"
1077
1078 source "drivers/base/Kconfig"
1079
1080 source "drivers/connector/Kconfig"
1081
1082 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1083 source "drivers/mtd/Kconfig"
1084 endif
1085
1086 source "drivers/parport/Kconfig"
1087
1088 source "drivers/pnp/Kconfig"
1089
1090 source "drivers/block/Kconfig"
1091
1092 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1093
1094 source "drivers/misc/Kconfig"
1095
1096 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
1097         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
1098         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
1099         || ARCH_IXP23XX
1100 source "drivers/ide/Kconfig"
1101 endif
1102
1103 source "drivers/scsi/Kconfig"
1104
1105 source "drivers/ata/Kconfig"
1106
1107 source "drivers/md/Kconfig"
1108
1109 source "drivers/message/fusion/Kconfig"
1110
1111 source "drivers/ieee1394/Kconfig"
1112
1113 source "drivers/message/i2o/Kconfig"
1114
1115 source "drivers/net/Kconfig"
1116
1117 source "drivers/isdn/Kconfig"
1118
1119 # input before char - char/joystick depends on it. As does USB.
1120
1121 source "drivers/input/Kconfig"
1122
1123 source "drivers/char/Kconfig"
1124
1125 source "drivers/i2c/Kconfig"
1126
1127 source "drivers/spi/Kconfig"
1128
1129 source "drivers/gpio/Kconfig"
1130
1131 source "drivers/w1/Kconfig"
1132
1133 source "drivers/power/Kconfig"
1134
1135 source "drivers/hwmon/Kconfig"
1136
1137 source "drivers/watchdog/Kconfig"
1138
1139 source "drivers/ssb/Kconfig"
1140
1141 #source "drivers/l3/Kconfig"
1142
1143 source "drivers/mfd/Kconfig"
1144
1145 source "drivers/media/Kconfig"
1146
1147 source "drivers/video/Kconfig"
1148
1149 source "sound/Kconfig"
1150
1151 source "drivers/hid/Kconfig"
1152
1153 source "drivers/usb/Kconfig"
1154
1155 source "drivers/mmc/Kconfig"
1156
1157 source "drivers/leds/Kconfig"
1158
1159 source "drivers/rtc/Kconfig"
1160
1161 source "drivers/dma/Kconfig"
1162
1163 source "drivers/dca/Kconfig"
1164
1165 endmenu
1166
1167 source "fs/Kconfig"
1168
1169 source "arch/arm/Kconfig.debug"
1170
1171 source "security/Kconfig"
1172
1173 source "crypto/Kconfig"
1174
1175 source "lib/Kconfig"