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