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_AOUT
  12         select HAVE_IDE
  13         select RTC_LIB
  14         select SYS_SUPPORTS_APM_EMULATION
  15         select HAVE_OPROFILE
  16         select HAVE_ARCH_KGDB
  17         select HAVE_KPROBES if (!XIP_KERNEL)
  18         select HAVE_KRETPROBES if (HAVE_KPROBES)
  19         select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  20         select HAVE_GENERIC_DMA_COHERENT
  21         help
  22           The ARM series is a line of low-power-consumption RISC chip designs
  23           licensed by ARM Ltd and targeted at embedded applications and
  24           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  25           manufactured, but legacy ARM-based PC hardware remains popular in
  26           Europe.  There is an ARM Linux project with a web page at
  27           <http://www.arm.linux.org.uk/>.
  28
  29 config HAVE_PWM
  30         bool
  31
  32 config SYS_SUPPORTS_APM_EMULATION
  33         bool
  34
  35 config GENERIC_GPIO
  36         bool
  37         default n
  38
  39 config GENERIC_TIME
  40         bool
  41         default n
  42
  43 config GENERIC_CLOCKEVENTS
  44         bool
  45         default n
  46
  47 config GENERIC_CLOCKEVENTS_BROADCAST
  48         bool
  49         depends on GENERIC_CLOCKEVENTS
  50         default y if SMP && !LOCAL_TIMERS
  51
  52 config MMU
  53         bool
  54         default y
  55
  56 config NO_IOPORT
  57         bool
  58         default n
  59
  60 config EISA
  61         bool
  62         ---help---
  63           The Extended Industry Standard Architecture (EISA) bus was
  64           developed as an open alternative to the IBM MicroChannel bus.
  65
  66           The EISA bus provided some of the features of the IBM MicroChannel
  67           bus while maintaining backward compatibility with cards made for
  68           the older ISA bus.  The EISA bus saw limited use between 1988 and
  69           1995 when it was made obsolete by the PCI bus.
  70
  71           Say Y here if you are building a kernel for an EISA-based machine.
  72
  73           Otherwise, say N.
  74
  75 config SBUS
  76         bool
  77
  78 config MCA
  79         bool
  80         help
  81           MicroChannel Architecture is found in some IBM PS/2 machines and
  82           laptops.  It is a bus system similar to PCI or ISA. See
  83           <file:Documentation/mca.txt> (and especially the web page given
  84           there) before attempting to build an MCA bus kernel.
  85
  86 config GENERIC_HARDIRQS
  87         bool
  88         default y
  89
  90 config STACKTRACE_SUPPORT
  91         bool
  92         default y
  93
  94 config HAVE_LATENCYTOP_SUPPORT
  95         bool
  96         depends on !SMP
  97         default y
  98
  99 config LOCKDEP_SUPPORT
 100         bool
 101         default y
 102
 103 config TRACE_IRQFLAGS_SUPPORT
 104         bool
 105         default y
 106
 107 config HARDIRQS_SW_RESEND
 108         bool
 109         default y
 110
 111 config GENERIC_IRQ_PROBE
 112         bool
 113         default y
 114
 115 config GENERIC_LOCKBREAK
 116         bool
 117         default y
 118         depends on SMP && PREEMPT
 119
 120 config RWSEM_GENERIC_SPINLOCK
 121         bool
 122         default y
 123
 124 config RWSEM_XCHGADD_ALGORITHM
 125         bool
 126
 127 config ARCH_HAS_ILOG2_U32
 128         bool
 129         default n
 130
 131 config ARCH_HAS_ILOG2_U64
 132         bool
 133         default n
 134
 135 config GENERIC_HWEIGHT
 136         bool
 137         default y
 138
 139 config GENERIC_CALIBRATE_DELAY
 140         bool
 141         default y
 142
 143 config ARCH_MAY_HAVE_PC_FDC
 144         bool
 145
 146 config ZONE_DMA
 147         bool
 148
 149 config GENERIC_ISA_DMA
 150         bool
 151
 152 config FIQ
 153         bool
 154
 155 config ARCH_MTD_XIP
 156         bool
 157
 158 config GENERIC_HARDIRQS_NO__DO_IRQ
 159         bool
 160         def_bool y
 161
 162 if OPROFILE
 163
 164 config OPROFILE_ARMV6
 165         def_bool y
 166         depends on CPU_V6 && !SMP
 167         select OPROFILE_ARM11_CORE
 168
 169 config OPROFILE_MPCORE
 170         def_bool y
 171         depends on CPU_V6 && SMP
 172         select OPROFILE_ARM11_CORE
 173
 174 config OPROFILE_ARM11_CORE
 175         bool
 176
 177 config OPROFILE_ARMV7
 178         def_bool y
 179         depends on CPU_V7 && !SMP
 180         bool
 181
 182 endif
 183
 184 config VECTORS_BASE
 185         hex
 186         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 187         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 188         default 0x00000000
 189         help
 190           The base address of exception vectors.
 191
 192 source "init/Kconfig"
 193
 194 source "kernel/Kconfig.freezer"
 195
 196 menu "System Type"
 197
 198 choice
 199         prompt "ARM system type"
 200         default ARCH_VERSATILE
 201
 202 config ARCH_AAEC2000
 203         bool "Agilent AAEC-2000 based"
 204         select ARM_AMBA
 205         select HAVE_CLK
 206         help
 207           This enables support for systems based on the Agilent AAEC-2000
 208
 209 config ARCH_INTEGRATOR
 210         bool "ARM Ltd. Integrator family"
 211         select ARM_AMBA
 212         select HAVE_CLK
 213         select ICST525
 214         help
 215           Support for ARM's Integrator platform.
 216
 217 config ARCH_REALVIEW
 218         bool "ARM Ltd. RealView family"
 219         select ARM_AMBA
 220         select HAVE_CLK
 221         select ICST307
 222         select GENERIC_TIME
 223         select GENERIC_CLOCKEVENTS
 224         help
 225           This enables support for ARM Ltd RealView boards.
 226
 227 config ARCH_VERSATILE
 228         bool "ARM Ltd. Versatile family"
 229         select ARM_AMBA
 230         select ARM_VIC
 231         select HAVE_CLK
 232         select ICST307
 233         select GENERIC_TIME
 234         select GENERIC_CLOCKEVENTS
 235         help
 236           This enables support for ARM Ltd Versatile board.
 237
 238 config ARCH_AT91
 239         bool "Atmel AT91"
 240         select GENERIC_GPIO
 241         select HAVE_CLK
 242         help
 243           This enables support for systems based on the Atmel AT91RM9200,
 244           AT91SAM9 and AT91CAP9 processors.
 245
 246 config ARCH_CLPS711X
 247         bool "Cirrus Logic CLPS711x/EP721x-based"
 248         help
 249           Support for Cirrus Logic 711x/721x based boards.
 250
 251 config ARCH_EBSA110
 252         bool "EBSA-110"
 253         select ISA
 254         select NO_IOPORT
 255         help
 256           This is an evaluation board for the StrongARM processor available
 257           from Digital. It has limited hardware on-board, including an
 258           Ethernet interface, two PCMCIA sockets, two serial ports and a
 259           parallel port.
 260
 261 config ARCH_EP93XX
 262         bool "EP93xx-based"
 263         select ARM_AMBA
 264         select ARM_VIC
 265         select GENERIC_GPIO
 266         select HAVE_CLK
 267         select ARCH_REQUIRE_GPIOLIB
 268         help
 269           This enables support for the Cirrus EP93xx series of CPUs.
 270
 271 config ARCH_FOOTBRIDGE
 272         bool "FootBridge"
 273         select FOOTBRIDGE
 274         help
 275           Support for systems based on the DC21285 companion chip
 276           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 277
 278 config ARCH_NETX
 279         bool "Hilscher NetX based"
 280         select ARM_VIC
 281         help
 282           This enables support for systems based on the Hilscher NetX Soc
 283
 284 config ARCH_H720X
 285         bool "Hynix HMS720x-based"
 286         select ISA_DMA_API
 287         help
 288           This enables support for systems based on the Hynix HMS720x
 289
 290 config ARCH_IMX
 291         bool "IMX"
 292         select GENERIC_GPIO
 293         select GENERIC_TIME
 294         select GENERIC_CLOCKEVENTS
 295         help
 296           Support for Motorola's i.MX family of processors (MX1, MXL).
 297
 298 config ARCH_IOP13XX
 299         bool "IOP13xx-based"
 300         depends on MMU
 301         select PLAT_IOP
 302         select PCI
 303         select ARCH_SUPPORTS_MSI
 304         select VMSPLIT_1G
 305         help
 306           Support for Intel's IOP13XX (XScale) family of processors.
 307
 308 config ARCH_IOP32X
 309         bool "IOP32x-based"
 310         depends on MMU
 311         select PLAT_IOP
 312         select PCI
 313         select GENERIC_GPIO
 314         select ARCH_REQUIRE_GPIOLIB
 315         help
 316           Support for Intel's 80219 and IOP32X (XScale) family of
 317           processors.
 318
 319 config ARCH_IOP33X
 320         bool "IOP33x-based"
 321         depends on MMU
 322         select PLAT_IOP
 323         select PCI
 324         select GENERIC_GPIO
 325         select ARCH_REQUIRE_GPIOLIB
 326         help
 327           Support for Intel's IOP33X (XScale) family of processors.
 328
 329 config ARCH_IXP23XX
 330         bool "IXP23XX-based"
 331         depends on MMU
 332         select PCI
 333         help
 334           Support for Intel's IXP23xx (XScale) family of processors.
 335
 336 config ARCH_IXP2000
 337         bool "IXP2400/2800-based"
 338         depends on MMU
 339         select PCI
 340         help
 341           Support for Intel's IXP2400/2800 (XScale) family of processors.
 342
 343 config ARCH_IXP4XX
 344         bool "IXP4xx-based"
 345         depends on MMU
 346         select GENERIC_GPIO
 347         select GENERIC_TIME
 348         select GENERIC_CLOCKEVENTS
 349         select DMABOUNCE if PCI
 350         help
 351           Support for Intel's IXP4XX (XScale) family of processors.
 352
 353 config ARCH_L7200
 354         bool "LinkUp-L7200"
 355         select FIQ
 356         help
 357           Say Y here if you intend to run this kernel on a LinkUp Systems
 358           L7200 Software Development Board which uses an ARM720T processor.
 359           Information on this board can be obtained at:
 360
 361           <http://www.linkupsys.com/>
 362
 363           If you have any questions or comments about the Linux kernel port
 364           to this board, send e-mail to <sjhill@cotw.com>.
 365
 366 config ARCH_KIRKWOOD
 367         bool "Marvell Kirkwood"
 368         select PCI
 369         select GENERIC_TIME
 370         select GENERIC_CLOCKEVENTS
 371         select PLAT_ORION
 372         help
 373           Support for the following Marvell Kirkwood series SoCs:
 374           88F6180, 88F6192 and 88F6281.
 375
 376 config ARCH_KS8695
 377         bool "Micrel/Kendin KS8695"
 378         select GENERIC_GPIO
 379         help
 380           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 381           System-on-Chip devices.
 382
 383 config ARCH_NS9XXX
 384         bool "NetSilicon NS9xxx"
 385         select GENERIC_GPIO
 386         select GENERIC_TIME
 387         select GENERIC_CLOCKEVENTS
 388         select HAVE_CLK
 389         help
 390           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 391           System.
 392
 393           <http://www.digi.com/products/microprocessors/index.jsp>
 394
 395 config ARCH_LOKI
 396         bool "Marvell Loki (88RC8480)"
 397         select GENERIC_TIME
 398         select GENERIC_CLOCKEVENTS
 399         select PLAT_ORION
 400         help
 401           Support for the Marvell Loki (88RC8480) SoC.
 402
 403 config ARCH_MV78XX0
 404         bool "Marvell MV78xx0"
 405         select PCI
 406         select GENERIC_TIME
 407         select GENERIC_CLOCKEVENTS
 408         select PLAT_ORION
 409         help
 410           Support for the following Marvell MV78xx0 series SoCs:
 411           MV781x0, MV782x0.
 412
 413 config ARCH_MXC
 414         bool "Freescale MXC/iMX-based"
 415         select GENERIC_TIME
 416         select GENERIC_CLOCKEVENTS
 417         select ARCH_MTD_XIP
 418         select GENERIC_GPIO
 419         select ARCH_REQUIRE_GPIOLIB
 420         help
 421           Support for Freescale MXC/iMX-based family of processors
 422
 423 config ARCH_ORION5X
 424         bool "Marvell Orion"
 425         depends on MMU
 426         select PCI
 427         select GENERIC_GPIO
 428         select GENERIC_TIME
 429         select GENERIC_CLOCKEVENTS
 430         select PLAT_ORION
 431         help
 432           Support for the following Marvell Orion 5x series SoCs:
 433           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 434           Orion-2 (5281), Orion-1-90 (6183).
 435
 436 config ARCH_PNX4008
 437         bool "Philips Nexperia PNX4008 Mobile"
 438         select HAVE_CLK
 439         help
 440           This enables support for Philips PNX4008 mobile platform.
 441
 442 config ARCH_PXA
 443         bool "PXA2xx/PXA3xx-based"
 444         depends on MMU
 445         select ARCH_MTD_XIP
 446         select GENERIC_GPIO
 447         select HAVE_CLK
 448         select ARCH_REQUIRE_GPIOLIB
 449         select GENERIC_TIME
 450         select GENERIC_CLOCKEVENTS
 451         select TICK_ONESHOT
 452         help
 453           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 454
 455 config ARCH_RPC
 456         bool "RiscPC"
 457         select ARCH_ACORN
 458         select FIQ
 459         select TIMER_ACORN
 460         select ARCH_MAY_HAVE_PC_FDC
 461         select HAVE_PATA_PLATFORM
 462         select ISA_DMA_API
 463         select NO_IOPORT
 464         select ARCH_SPARSEMEM_ENABLE
 465         help
 466           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 467           CD-ROM interface, serial and parallel port, and the floppy drive.
 468
 469 config ARCH_SA1100
 470         bool "SA1100-based"
 471         select ISA
 472         select ARCH_SPARSEMEM_ENABLE
 473         select ARCH_MTD_XIP
 474         select GENERIC_GPIO
 475         select GENERIC_TIME
 476         select GENERIC_CLOCKEVENTS
 477         select HAVE_CLK
 478         select TICK_ONESHOT
 479         select ARCH_REQUIRE_GPIOLIB
 480         help
 481           Support for StrongARM 11x0 based boards.
 482
 483 config ARCH_S3C2410
 484         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 485         select GENERIC_GPIO
 486         select HAVE_CLK
 487         help
 488           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 489           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 490           the Samsung SMDK2410 development board (and derivatives).
 491
 492 config ARCH_SHARK
 493         bool "Shark"
 494         select ISA
 495         select ISA_DMA
 496         select ZONE_DMA
 497         select PCI
 498         help
 499           Support for the StrongARM based Digital DNARD machine, also known
 500           as "Shark" (<http://www.shark-linux.de/shark.html>).
 501
 502 config ARCH_LH7A40X
 503         bool "Sharp LH7A40X"
 504         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 505         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 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 ARCH_REQUIRE_GPIOLIB
 518         select HAVE_CLK
 519         select ZONE_DMA
 520         help
 521           Support for TI's DaVinci platform.
 522
 523 config ARCH_OMAP
 524         bool "TI OMAP"
 525         select GENERIC_GPIO
 526         select HAVE_CLK
 527         select ARCH_REQUIRE_GPIOLIB
 528         select GENERIC_TIME
 529         select GENERIC_CLOCKEVENTS
 530         help
 531           Support for TI's OMAP platform (OMAP1 and OMAP2).
 532
 533 config ARCH_MSM
 534         bool "Qualcomm MSM"
 535         select GENERIC_TIME
 536         select GENERIC_CLOCKEVENTS
 537         help
 538           Support for Qualcomm MSM7K based systems.  This runs on the ARM11
 539           apps processor of the MSM7K and depends on a shared memory
 540           interface to the ARM9 modem processor which runs the baseband stack
 541           and controls some vital subsystems (clock and power control, etc).
 542
 543 endchoice
 544
 545 source "arch/arm/mach-clps711x/Kconfig"
 546
 547 source "arch/arm/mach-ep93xx/Kconfig"
 548
 549 source "arch/arm/mach-footbridge/Kconfig"
 550
 551 source "arch/arm/mach-integrator/Kconfig"
 552
 553 source "arch/arm/mach-iop32x/Kconfig"
 554
 555 source "arch/arm/mach-iop33x/Kconfig"
 556
 557 source "arch/arm/mach-iop13xx/Kconfig"
 558
 559 source "arch/arm/mach-ixp4xx/Kconfig"
 560
 561 source "arch/arm/mach-ixp2000/Kconfig"
 562
 563 source "arch/arm/mach-ixp23xx/Kconfig"
 564
 565 source "arch/arm/mach-loki/Kconfig"
 566
 567 source "arch/arm/mach-mv78xx0/Kconfig"
 568
 569 source "arch/arm/mach-pxa/Kconfig"
 570
 571 source "arch/arm/mach-sa1100/Kconfig"
 572
 573 source "arch/arm/plat-omap/Kconfig"
 574
 575 source "arch/arm/mach-omap1/Kconfig"
 576
 577 source "arch/arm/mach-omap2/Kconfig"
 578
 579 source "arch/arm/mach-orion5x/Kconfig"
 580
 581 source "arch/arm/mach-kirkwood/Kconfig"
 582
 583 source "arch/arm/plat-s3c24xx/Kconfig"
 584 source "arch/arm/plat-s3c/Kconfig"
 585
 586 if ARCH_S3C2410
 587 source "arch/arm/mach-s3c2400/Kconfig"
 588 source "arch/arm/mach-s3c2410/Kconfig"
 589 source "arch/arm/mach-s3c2412/Kconfig"
 590 source "arch/arm/mach-s3c2440/Kconfig"
 591 source "arch/arm/mach-s3c2442/Kconfig"
 592 source "arch/arm/mach-s3c2443/Kconfig"
 593 endif
 594
 595 source "arch/arm/mach-lh7a40x/Kconfig"
 596
 597 source "arch/arm/mach-imx/Kconfig"
 598
 599 source "arch/arm/mach-h720x/Kconfig"
 600
 601 source "arch/arm/mach-versatile/Kconfig"
 602
 603 source "arch/arm/mach-aaec2000/Kconfig"
 604
 605 source "arch/arm/mach-realview/Kconfig"
 606
 607 source "arch/arm/mach-at91/Kconfig"
 608
 609 source "arch/arm/plat-mxc/Kconfig"
 610
 611 source "arch/arm/mach-netx/Kconfig"
 612
 613 source "arch/arm/mach-ns9xxx/Kconfig"
 614
 615 source "arch/arm/mach-davinci/Kconfig"
 616
 617 source "arch/arm/mach-ks8695/Kconfig"
 618
 619 source "arch/arm/mach-msm/Kconfig"
 620
 621 # Definitions to make life easier
 622 config ARCH_ACORN
 623         bool
 624
 625 config PLAT_IOP
 626         bool
 627
 628 config PLAT_ORION
 629         bool
 630
 631 source arch/arm/mm/Kconfig
 632
 633 config IWMMXT
 634         bool "Enable iWMMXt support"
 635         depends on CPU_XSCALE || CPU_XSC3
 636         default y if PXA27x || PXA3xx
 637         help
 638           Enable support for iWMMXt context switching at run time if
 639           running on a CPU that supports it.
 640
 641 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 642 config XSCALE_PMU
 643         bool
 644         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 645         default y
 646
 647 if !MMU
 648 source "arch/arm/Kconfig-nommu"
 649 endif
 650
 651 endmenu
 652
 653 source "arch/arm/common/Kconfig"
 654
 655 config FORCE_MAX_ZONEORDER
 656         int
 657         depends on SA1111
 658         default "9"
 659
 660 menu "Bus support"
 661
 662 config ARM_AMBA
 663         bool
 664
 665 config ISA
 666         bool
 667         help
 668           Find out whether you have ISA slots on your motherboard.  ISA is the
 669           name of a bus system, i.e. the way the CPU talks to the other stuff
 670           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 671           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 672           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 673
 674 # Select ISA DMA controller support
 675 config ISA_DMA
 676         bool
 677         select ISA_DMA_API
 678
 679 # Select ISA DMA interface
 680 config ISA_DMA_API
 681         bool
 682
 683 config PCI
 684         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 685         help
 686           Find out whether you have a PCI motherboard. PCI is the name of a
 687           bus system, i.e. the way the CPU talks to the other stuff inside
 688           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 689           VESA. If you have PCI, say Y, otherwise N.
 690
 691 config PCI_SYSCALL
 692         def_bool PCI
 693
 694 # Select the host bridge type
 695 config PCI_HOST_VIA82C505
 696         bool
 697         depends on PCI && ARCH_SHARK
 698         default y
 699
 700 config PCI_HOST_ITE8152
 701         bool
 702         depends on PCI && MACH_ARMCORE
 703         default y
 704         select DMABOUNCE
 705
 706 source "drivers/pci/Kconfig"
 707
 708 source "drivers/pcmcia/Kconfig"
 709
 710 endmenu
 711
 712 menu "Kernel Features"
 713
 714 source "kernel/time/Kconfig"
 715
 716 config SMP
 717         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 718         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 719         select USE_GENERIC_SMP_HELPERS
 720         help
 721           This enables support for systems with more than one CPU. If you have
 722           a system with only one CPU, like most personal computers, say N. If
 723           you have a system with more than one CPU, say Y.
 724
 725           If you say N here, the kernel will run on single and multiprocessor
 726           machines, but will use only one CPU of a multiprocessor machine. If
 727           you say Y here, the kernel will run on many, but not all, single
 728           processor machines. On a single processor machine, the kernel will
 729           run faster if you say N here.
 730
 731           See also <file:Documentation/i386/IO-APIC.txt>,
 732           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 733           <http://www.linuxdoc.org/docs.html#howto>.
 734
 735           If you don't know what to do here, say N.
 736
 737 choice
 738         prompt "Memory split"
 739         default VMSPLIT_3G
 740         help
 741           Select the desired split between kernel and user memory.
 742
 743           If you are not absolutely sure what you are doing, leave this
 744           option alone!
 745
 746         config VMSPLIT_3G
 747                 bool "3G/1G user/kernel split"
 748         config VMSPLIT_2G
 749                 bool "2G/2G user/kernel split"
 750         config VMSPLIT_1G
 751                 bool "1G/3G user/kernel split"
 752 endchoice
 753
 754 config PAGE_OFFSET
 755         hex
 756         default 0x40000000 if VMSPLIT_1G
 757         default 0x80000000 if VMSPLIT_2G
 758         default 0xC0000000
 759
 760 config NR_CPUS
 761         int "Maximum number of CPUs (2-32)"
 762         range 2 32
 763         depends on SMP
 764         default "4"
 765
 766 config HOTPLUG_CPU
 767         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 768         depends on SMP && HOTPLUG && EXPERIMENTAL
 769         help
 770           Say Y here to experiment with turning CPUs off and on.  CPUs
 771           can be controlled through /sys/devices/system/cpu.
 772
 773 config LOCAL_TIMERS
 774         bool "Use local timer interrupts"
 775         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 776         default y
 777         help
 778           Enable support for local timers on SMP platforms, rather then the
 779           legacy IPI broadcast method.  Local timers allows the system
 780           accounting to be spread across the timer interval, preventing a
 781           "thundering herd" at every timer tick.
 782
 783 config PREEMPT
 784         bool "Preemptible Kernel (EXPERIMENTAL)"
 785         depends on EXPERIMENTAL
 786         help
 787           This option reduces the latency of the kernel when reacting to
 788           real-time or interactive events by allowing a low priority process to
 789           be preempted even if it is in kernel mode executing a system call.
 790           This allows applications to run more reliably even when the system is
 791           under load.
 792
 793           Say Y here if you are building a kernel for a desktop, embedded
 794           or real-time system.  Say N if you are unsure.
 795
 796 config HZ
 797         int
 798         default 128 if ARCH_L7200
 799         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 800         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 801         default AT91_TIMER_HZ if ARCH_AT91
 802         default 100
 803
 804 config AEABI
 805         bool "Use the ARM EABI to compile the kernel"
 806         help
 807           This option allows for the kernel to be compiled using the latest
 808           ARM ABI (aka EABI).  This is only useful if you are using a user
 809           space environment that is also compiled with EABI.
 810
 811           Since there are major incompatibilities between the legacy ABI and
 812           EABI, especially with regard to structure member alignment, this
 813           option also changes the kernel syscall calling convention to
 814           disambiguate both ABIs and allow for backward compatibility support
 815           (selected with CONFIG_OABI_COMPAT).
 816
 817           To use this you need GCC version 4.0.0 or later.
 818
 819 config OABI_COMPAT
 820         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 821         depends on AEABI && EXPERIMENTAL
 822         default y
 823         help
 824           This option preserves the old syscall interface along with the
 825           new (ARM EABI) one. It also provides a compatibility layer to
 826           intercept syscalls that have structure arguments which layout
 827           in memory differs between the legacy ABI and the new ARM EABI
 828           (only for non "thumb" binaries). This option adds a tiny
 829           overhead to all syscalls and produces a slightly larger kernel.
 830           If you know you'll be using only pure EABI user space then you
 831           can say N here. If this option is not selected and you attempt
 832           to execute a legacy ABI binary then the result will be
 833           UNPREDICTABLE (in fact it can be predicted that it won't work
 834           at all). If in doubt say Y.
 835
 836 config ARCH_FLATMEM_HAS_HOLES
 837         bool
 838         default y
 839         depends on FLATMEM
 840
 841 # Discontigmem is deprecated
 842 config ARCH_DISCONTIGMEM_ENABLE
 843         bool
 844
 845 config ARCH_SPARSEMEM_ENABLE
 846         bool
 847
 848 config ARCH_SPARSEMEM_DEFAULT
 849         def_bool ARCH_SPARSEMEM_ENABLE
 850
 851 config ARCH_SELECT_MEMORY_MODEL
 852         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
 853
 854 config NODES_SHIFT
 855         int
 856         default "4" if ARCH_LH7A40X
 857         default "2"
 858         depends on NEED_MULTIPLE_NODES
 859
 860 source "mm/Kconfig"
 861
 862 config LEDS
 863         bool "Timer and CPU usage LEDs"
 864         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
 865                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 866                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 867                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 868                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 869                    ARCH_AT91 || ARCH_DAVINCI || \
 870                    ARCH_KS8695 || MACH_RD88F5182
 871         help
 872           If you say Y here, the LEDs on your machine will be used
 873           to provide useful information about your current system status.
 874
 875           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 876           be able to select which LEDs are active using the options below. If
 877           you are compiling a kernel for the EBSA-110 or the LART however, the
 878           red LED will simply flash regularly to indicate that the system is
 879           still functional. It is safe to say Y here if you have a CATS
 880           system, but the driver will do nothing.
 881
 882 config LEDS_TIMER
 883         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 884                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 885                             || MACH_OMAP_PERSEUS2
 886         depends on LEDS
 887         depends on !GENERIC_CLOCKEVENTS
 888         default y if ARCH_EBSA110
 889         help
 890           If you say Y here, one of the system LEDs (the green one on the
 891           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 892           will flash regularly to indicate that the system is still
 893           operational. This is mainly useful to kernel hackers who are
 894           debugging unstable kernels.
 895
 896           The LART uses the same LED for both Timer LED and CPU usage LED
 897           functions. You may choose to use both, but the Timer LED function
 898           will overrule the CPU usage LED.
 899
 900 config LEDS_CPU
 901         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 902                         !ARCH_OMAP) \
 903                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
 904                         || MACH_OMAP_PERSEUS2
 905         depends on LEDS
 906         help
 907           If you say Y here, the red LED will be used to give a good real
 908           time indication of CPU usage, by lighting whenever the idle task
 909           is not currently executing.
 910
 911           The LART uses the same LED for both Timer LED and CPU usage LED
 912           functions. You may choose to use both, but the Timer LED function
 913           will overrule the CPU usage LED.
 914
 915 config ALIGNMENT_TRAP
 916         bool
 917         depends on CPU_CP15_MMU
 918         default y if !ARCH_EBSA110
 919         help
 920           ARM processors cannot fetch/store information which is not
 921           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 922           address divisible by 4. On 32-bit ARM processors, these non-aligned
 923           fetch/store instructions will be emulated in software if you say
 924           here, which has a severe performance impact. This is necessary for
 925           correct operation of some network protocols. With an IP-only
 926           configuration it is safe to say N, otherwise say Y.
 927
 928 endmenu
 929
 930 menu "Boot options"
 931
 932 # Compressed boot loader in ROM.  Yes, we really want to ask about
 933 # TEXT and BSS so we preserve their values in the config files.
 934 config ZBOOT_ROM_TEXT
 935         hex "Compressed ROM boot loader base address"
 936         default "0"
 937         help
 938           The physical address at which the ROM-able zImage is to be
 939           placed in the target.  Platforms which normally make use of
 940           ROM-able zImage formats normally set this to a suitable
 941           value in their defconfig file.
 942
 943           If ZBOOT_ROM is not enabled, this has no effect.
 944
 945 config ZBOOT_ROM_BSS
 946         hex "Compressed ROM boot loader BSS address"
 947         default "0"
 948         help
 949           The base address of an area of read/write memory in the target
 950           for the ROM-able zImage which must be available while the
 951           decompressor is running. It must be large enough to hold the
 952           entire decompressed kernel plus an additional 128 KiB.
 953           Platforms which normally make use of ROM-able zImage formats
 954           normally set this to a suitable value in their defconfig file.
 955
 956           If ZBOOT_ROM is not enabled, this has no effect.
 957
 958 config ZBOOT_ROM
 959         bool "Compressed boot loader in ROM/flash"
 960         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 961         help
 962           Say Y here if you intend to execute your compressed kernel image
 963           (zImage) directly from ROM or flash.  If unsure, say N.
 964
 965 config CMDLINE
 966         string "Default kernel command string"
 967         default ""
 968         help
 969           On some architectures (EBSA110 and CATS), there is currently no way
 970           for the boot loader to pass arguments to the kernel. For these
 971           architectures, you should supply some command-line options at build
 972           time by entering them here. As a minimum, you should specify the
 973           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 974
 975 config XIP_KERNEL
 976         bool "Kernel Execute-In-Place from ROM"
 977         depends on !ZBOOT_ROM
 978         help
 979           Execute-In-Place allows the kernel to run from non-volatile storage
 980           directly addressable by the CPU, such as NOR flash. This saves RAM
 981           space since the text section of the kernel is not loaded from flash
 982           to RAM.  Read-write sections, such as the data section and stack,
 983           are still copied to RAM.  The XIP kernel is not compressed since
 984           it has to run directly from flash, so it will take more space to
 985           store it.  The flash address used to link the kernel object files,
 986           and for storing it, is configuration dependent. Therefore, if you
 987           say Y here, you must know the proper physical address where to
 988           store the kernel image depending on your own flash memory usage.
 989
 990           Also note that the make target becomes "make xipImage" rather than
 991           "make zImage" or "make Image".  The final kernel binary to put in
 992           ROM memory will be arch/arm/boot/xipImage.
 993
 994           If unsure, say N.
 995
 996 config XIP_PHYS_ADDR
 997         hex "XIP Kernel Physical Location"
 998         depends on XIP_KERNEL
 999         default "0x00080000"
1000         help
1001           This is the physical address in your flash memory the kernel will
1002           be linked for and stored to.  This address is dependent on your
1003           own flash usage.
1004
1005 config KEXEC
1006         bool "Kexec system call (EXPERIMENTAL)"
1007         depends on EXPERIMENTAL
1008         help
1009           kexec is a system call that implements the ability to shutdown your
1010           current kernel, and to start another kernel.  It is like a reboot
1011           but it is independent of the system firmware.   And like a reboot
1012           you can start any kernel with it, not just Linux.
1013
1014           It is an ongoing process to be certain the hardware in a machine
1015           is properly shutdown, so do not be surprised if this code does not
1016           initially work for you.  It may help to enable device hotplugging
1017           support.
1018
1019 config ATAGS_PROC
1020         bool "Export atags in procfs"
1021         depends on KEXEC
1022         default y
1023         help
1024           Should the atags used to boot the kernel be exported in an "atags"
1025           file in procfs. Useful with kexec.
1026
1027 endmenu
1028
1029 menu "CPU Power Management"
1030
1031 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1032
1033 source "drivers/cpufreq/Kconfig"
1034
1035 config CPU_FREQ_SA1100
1036         bool
1037         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1038         default y
1039
1040 config CPU_FREQ_SA1110
1041         bool
1042         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1043         default y
1044
1045 config CPU_FREQ_INTEGRATOR
1046         tristate "CPUfreq driver for ARM Integrator CPUs"
1047         depends on ARCH_INTEGRATOR && CPU_FREQ
1048         default y
1049         help
1050           This enables the CPUfreq driver for ARM Integrator CPUs.
1051
1052           For details, take a look at <file:Documentation/cpu-freq>.
1053
1054           If in doubt, say Y.
1055
1056 config CPU_FREQ_IMX
1057         tristate "CPUfreq driver for i.MX CPUs"
1058         depends on ARCH_IMX && CPU_FREQ
1059         default n
1060         help
1061           This enables the CPUfreq driver for i.MX CPUs.
1062
1063           If in doubt, say N.
1064
1065 config CPU_FREQ_PXA
1066         bool
1067         depends on CPU_FREQ && ARCH_PXA && PXA25x
1068         default y
1069         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1070
1071 endif
1072
1073 source "drivers/cpuidle/Kconfig"
1074
1075 endmenu
1076
1077 menu "Floating point emulation"
1078
1079 comment "At least one emulation must be selected"
1080
1081 config FPE_NWFPE
1082         bool "NWFPE math emulation"
1083         depends on !AEABI || OABI_COMPAT
1084         ---help---
1085           Say Y to include the NWFPE floating point emulator in the kernel.
1086           This is necessary to run most binaries. Linux does not currently
1087           support floating point hardware so you need to say Y here even if
1088           your machine has an FPA or floating point co-processor podule.
1089
1090           You may say N here if you are going to load the Acorn FPEmulator
1091           early in the bootup.
1092
1093 config FPE_NWFPE_XP
1094         bool "Support extended precision"
1095         depends on FPE_NWFPE
1096         help
1097           Say Y to include 80-bit support in the kernel floating-point
1098           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1099           Note that gcc does not generate 80-bit operations by default,
1100           so in most cases this option only enlarges the size of the
1101           floating point emulator without any good reason.
1102
1103           You almost surely want to say N here.
1104
1105 config FPE_FASTFPE
1106         bool "FastFPE math emulation (EXPERIMENTAL)"
1107         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1108         ---help---
1109           Say Y here to include the FAST floating point emulator in the kernel.
1110           This is an experimental much faster emulator which now also has full
1111           precision for the mantissa.  It does not support any exceptions.
1112           It is very simple, and approximately 3-6 times faster than NWFPE.
1113
1114           It should be sufficient for most programs.  It may be not suitable
1115           for scientific calculations, but you have to check this for yourself.
1116           If you do not feel you need a faster FP emulation you should better
1117           choose NWFPE.
1118
1119 config VFP
1120         bool "VFP-format floating point maths"
1121         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1122         help
1123           Say Y to include VFP support code in the kernel. This is needed
1124           if your hardware includes a VFP unit.
1125
1126           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1127           release notes and additional status information.
1128
1129           Say N if your target does not have VFP hardware.
1130
1131 config VFPv3
1132         bool
1133         depends on VFP
1134         default y if CPU_V7
1135
1136 config NEON
1137         bool "Advanced SIMD (NEON) Extension support"
1138         depends on VFPv3 && CPU_V7
1139         help
1140           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1141           Extension.
1142
1143 endmenu
1144
1145 menu "Userspace binary formats"
1146
1147 source "fs/Kconfig.binfmt"
1148
1149 config ARTHUR
1150         tristate "RISC OS personality"
1151         depends on !AEABI
1152         help
1153           Say Y here to include the kernel code necessary if you want to run
1154           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1155           experimental; if this sounds frightening, say N and sleep in peace.
1156           You can also say M here to compile this support as a module (which
1157           will be called arthur).
1158
1159 endmenu
1160
1161 menu "Power management options"
1162
1163 source "kernel/power/Kconfig"
1164
1165 config ARCH_SUSPEND_POSSIBLE
1166         def_bool y
1167
1168 endmenu
1169
1170 source "net/Kconfig"
1171
1172 menu "Device Drivers"
1173
1174 source "drivers/base/Kconfig"
1175
1176 source "drivers/connector/Kconfig"
1177
1178 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1179 source "drivers/mtd/Kconfig"
1180 endif
1181
1182 source "drivers/parport/Kconfig"
1183
1184 source "drivers/pnp/Kconfig"
1185
1186 source "drivers/block/Kconfig"
1187
1188 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1189
1190 source "drivers/misc/Kconfig"
1191
1192 source "drivers/ide/Kconfig"
1193
1194 source "drivers/scsi/Kconfig"
1195
1196 source "drivers/ata/Kconfig"
1197
1198 source "drivers/md/Kconfig"
1199
1200 source "drivers/message/fusion/Kconfig"
1201
1202 source "drivers/ieee1394/Kconfig"
1203
1204 source "drivers/message/i2o/Kconfig"
1205
1206 source "drivers/net/Kconfig"
1207
1208 source "drivers/isdn/Kconfig"
1209
1210 # input before char - char/joystick depends on it. As does USB.
1211
1212 source "drivers/input/Kconfig"
1213
1214 source "drivers/char/Kconfig"
1215
1216 source "drivers/i2c/Kconfig"
1217
1218 source "drivers/spi/Kconfig"
1219
1220 source "drivers/gpio/Kconfig"
1221
1222 source "drivers/w1/Kconfig"
1223
1224 source "drivers/power/Kconfig"
1225
1226 source "drivers/hwmon/Kconfig"
1227
1228 source "drivers/thermal/Kconfig"
1229
1230 source "drivers/watchdog/Kconfig"
1231
1232 source "drivers/ssb/Kconfig"
1233
1234 #source "drivers/l3/Kconfig"
1235
1236 source "drivers/mfd/Kconfig"
1237
1238 source "drivers/media/Kconfig"
1239
1240 source "drivers/video/Kconfig"
1241
1242 source "sound/Kconfig"
1243
1244 source "drivers/hid/Kconfig"
1245
1246 source "drivers/usb/Kconfig"
1247
1248 source "drivers/uwb/Kconfig"
1249
1250 source "drivers/mmc/Kconfig"
1251
1252 source "drivers/memstick/Kconfig"
1253
1254 source "drivers/accessibility/Kconfig"
1255
1256 source "drivers/leds/Kconfig"
1257
1258 source "drivers/rtc/Kconfig"
1259
1260 source "drivers/dma/Kconfig"
1261
1262 source "drivers/dca/Kconfig"
1263
1264 source "drivers/auxdisplay/Kconfig"
1265
1266 source "drivers/regulator/Kconfig"
1267
1268 source "drivers/uio/Kconfig"
1269
1270 endmenu
1271
1272 source "fs/Kconfig"
1273
1274 source "arch/arm/Kconfig.debug"
1275
1276 source "security/Kconfig"
1277
1278 source "crypto/Kconfig"
1279
1280 source "lib/Kconfig"