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
  38 config GENERIC_TIME
  39         bool
  40
  41 config GENERIC_CLOCKEVENTS
  42         bool
  43
  44 config GENERIC_CLOCKEVENTS_BROADCAST
  45         bool
  46         depends on GENERIC_CLOCKEVENTS
  47         default y if SMP && !LOCAL_TIMERS
  48
  49 config HAVE_TCM
  50         bool
  51         select GENERIC_ALLOCATOR
  52
  53 config NO_IOPORT
  54         bool
  55
  56 config EISA
  57         bool
  58         ---help---
  59           The Extended Industry Standard Architecture (EISA) bus was
  60           developed as an open alternative to the IBM MicroChannel bus.
  61
  62           The EISA bus provided some of the features of the IBM MicroChannel
  63           bus while maintaining backward compatibility with cards made for
  64           the older ISA bus.  The EISA bus saw limited use between 1988 and
  65           1995 when it was made obsolete by the PCI bus.
  66
  67           Say Y here if you are building a kernel for an EISA-based machine.
  68
  69           Otherwise, say N.
  70
  71 config SBUS
  72         bool
  73
  74 config MCA
  75         bool
  76         help
  77           MicroChannel Architecture is found in some IBM PS/2 machines and
  78           laptops.  It is a bus system similar to PCI or ISA. See
  79           <file:Documentation/mca.txt> (and especially the web page given
  80           there) before attempting to build an MCA bus kernel.
  81
  82 config GENERIC_HARDIRQS
  83         bool
  84         default y
  85
  86 config STACKTRACE_SUPPORT
  87         bool
  88         default y
  89
  90 config HAVE_LATENCYTOP_SUPPORT
  91         bool
  92         depends on !SMP
  93         default y
  94
  95 config LOCKDEP_SUPPORT
  96         bool
  97         default y
  98
  99 config TRACE_IRQFLAGS_SUPPORT
 100         bool
 101         default y
 102
 103 config HARDIRQS_SW_RESEND
 104         bool
 105         default y
 106
 107 config GENERIC_IRQ_PROBE
 108         bool
 109         default y
 110
 111 config GENERIC_LOCKBREAK
 112         bool
 113         default y
 114         depends on SMP && PREEMPT
 115
 116 config RWSEM_GENERIC_SPINLOCK
 117         bool
 118         default y
 119
 120 config RWSEM_XCHGADD_ALGORITHM
 121         bool
 122
 123 config ARCH_HAS_ILOG2_U32
 124         bool
 125
 126 config ARCH_HAS_ILOG2_U64
 127         bool
 128
 129 config ARCH_HAS_CPUFREQ
 130         bool
 131         help
 132           Internal node to signify that the ARCH has CPUFREQ support
 133           and that the relevant menu configurations are displayed for
 134           it.
 135
 136 config GENERIC_HWEIGHT
 137         bool
 138         default y
 139
 140 config GENERIC_CALIBRATE_DELAY
 141         bool
 142         default y
 143
 144 config ARCH_MAY_HAVE_PC_FDC
 145         bool
 146
 147 config ZONE_DMA
 148         bool
 149
 150 config GENERIC_ISA_DMA
 151         bool
 152
 153 config FIQ
 154         bool
 155
 156 config ARCH_MTD_XIP
 157         bool
 158
 159 config GENERIC_HARDIRQS_NO__DO_IRQ
 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 config MMU
 199         bool "MMU-based Paged Memory Management Support"
 200         default y
 201         help
 202           Select if you want MMU-based virtualised addressing space
 203           support by paged memory management. If unsure, say 'Y'.
 204
 205 choice
 206         prompt "ARM system type"
 207         default ARCH_VERSATILE
 208
 209 config ARCH_AAEC2000
 210         bool "Agilent AAEC-2000 based"
 211         select CPU_ARM920T
 212         select ARM_AMBA
 213         select HAVE_CLK
 214         help
 215           This enables support for systems based on the Agilent AAEC-2000
 216
 217 config ARCH_INTEGRATOR
 218         bool "ARM Ltd. Integrator family"
 219         select ARM_AMBA
 220         select ARCH_HAS_CPUFREQ
 221         select HAVE_CLK
 222         select COMMON_CLKDEV
 223         select ICST525
 224         help
 225           Support for ARM's Integrator platform.
 226
 227 config ARCH_REALVIEW
 228         bool "ARM Ltd. RealView family"
 229         select ARM_AMBA
 230         select HAVE_CLK
 231         select COMMON_CLKDEV
 232         select ICST307
 233         select GENERIC_TIME
 234         select GENERIC_CLOCKEVENTS
 235         select ARCH_WANT_OPTIONAL_GPIOLIB
 236         help
 237           This enables support for ARM Ltd RealView boards.
 238
 239 config ARCH_VERSATILE
 240         bool "ARM Ltd. Versatile family"
 241         select ARM_AMBA
 242         select ARM_VIC
 243         select HAVE_CLK
 244         select COMMON_CLKDEV
 245         select ICST307
 246         select GENERIC_TIME
 247         select GENERIC_CLOCKEVENTS
 248         select ARCH_WANT_OPTIONAL_GPIOLIB
 249         help
 250           This enables support for ARM Ltd Versatile board.
 251
 252 config ARCH_AT91
 253         bool "Atmel AT91"
 254         select GENERIC_GPIO
 255         select ARCH_REQUIRE_GPIOLIB
 256         select HAVE_CLK
 257         help
 258           This enables support for systems based on the Atmel AT91RM9200,
 259           AT91SAM9 and AT91CAP9 processors.
 260
 261 config ARCH_CLPS711X
 262         bool "Cirrus Logic CLPS711x/EP721x-based"
 263         select CPU_ARM720T
 264         help
 265           Support for Cirrus Logic 711x/721x based boards.
 266
 267 config ARCH_GEMINI
 268         bool "Cortina Systems Gemini"
 269         select CPU_FA526
 270         select GENERIC_GPIO
 271         select ARCH_REQUIRE_GPIOLIB
 272         help
 273           Support for the Cortina Systems Gemini family SoCs
 274
 275 config ARCH_EBSA110
 276         bool "EBSA-110"
 277         select CPU_SA110
 278         select ISA
 279         select NO_IOPORT
 280         help
 281           This is an evaluation board for the StrongARM processor available
 282           from Digital. It has limited hardware on-board, including an
 283           Ethernet interface, two PCMCIA sockets, two serial ports and a
 284           parallel port.
 285
 286 config ARCH_EP93XX
 287         bool "EP93xx-based"
 288         select CPU_ARM920T
 289         select ARM_AMBA
 290         select ARM_VIC
 291         select GENERIC_GPIO
 292         select HAVE_CLK
 293         select COMMON_CLKDEV
 294         select ARCH_REQUIRE_GPIOLIB
 295         select ARCH_HAS_HOLES_MEMORYMODEL
 296         help
 297           This enables support for the Cirrus EP93xx series of CPUs.
 298
 299 config ARCH_FOOTBRIDGE
 300         bool "FootBridge"
 301         select CPU_SA110
 302         select FOOTBRIDGE
 303         help
 304           Support for systems based on the DC21285 companion chip
 305           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 306
 307 config ARCH_MXC
 308         bool "Freescale MXC/iMX-based"
 309         select GENERIC_TIME
 310         select GENERIC_CLOCKEVENTS
 311         select ARCH_MTD_XIP
 312         select GENERIC_GPIO
 313         select ARCH_REQUIRE_GPIOLIB
 314         select HAVE_CLK
 315         help
 316           Support for Freescale MXC/iMX-based family of processors
 317
 318 config ARCH_STMP3XXX
 319         bool "Freescale STMP3xxx"
 320         select CPU_ARM926T
 321         select HAVE_CLK
 322         select COMMON_CLKDEV
 323         select ARCH_REQUIRE_GPIOLIB
 324         select GENERIC_TIME
 325         select GENERIC_CLOCKEVENTS
 326         select GENERIC_GPIO
 327         select USB_ARCH_HAS_EHCI
 328         help
 329           Support for systems based on the Freescale 3xxx CPUs.
 330
 331 config ARCH_NETX
 332         bool "Hilscher NetX based"
 333         select CPU_ARM926T
 334         select ARM_VIC
 335         select GENERIC_CLOCKEVENTS
 336         select GENERIC_TIME
 337         help
 338           This enables support for systems based on the Hilscher NetX Soc
 339
 340 config ARCH_H720X
 341         bool "Hynix HMS720x-based"
 342         select CPU_ARM720T
 343         select ISA_DMA_API
 344         help
 345           This enables support for systems based on the Hynix HMS720x
 346
 347 config ARCH_NOMADIK
 348         bool "STMicroelectronics Nomadik"
 349         select ARM_AMBA
 350         select ARM_VIC
 351         select CPU_ARM926T
 352         select HAVE_CLK
 353         select COMMON_CLKDEV
 354         select GENERIC_TIME
 355         select GENERIC_CLOCKEVENTS
 356         select GENERIC_GPIO
 357         select ARCH_REQUIRE_GPIOLIB
 358         help
 359           Support for the Nomadik platform by ST-Ericsson
 360
 361 config ARCH_IOP13XX
 362         bool "IOP13xx-based"
 363         depends on MMU
 364         select CPU_XSC3
 365         select PLAT_IOP
 366         select PCI
 367         select ARCH_SUPPORTS_MSI
 368         select VMSPLIT_1G
 369         help
 370           Support for Intel's IOP13XX (XScale) family of processors.
 371
 372 config ARCH_IOP32X
 373         bool "IOP32x-based"
 374         depends on MMU
 375         select CPU_XSCALE
 376         select PLAT_IOP
 377         select PCI
 378         select GENERIC_GPIO
 379         select ARCH_REQUIRE_GPIOLIB
 380         help
 381           Support for Intel's 80219 and IOP32X (XScale) family of
 382           processors.
 383
 384 config ARCH_IOP33X
 385         bool "IOP33x-based"
 386         depends on MMU
 387         select CPU_XSCALE
 388         select PLAT_IOP
 389         select PCI
 390         select GENERIC_GPIO
 391         select ARCH_REQUIRE_GPIOLIB
 392         help
 393           Support for Intel's IOP33X (XScale) family of processors.
 394
 395 config ARCH_IXP23XX
 396         bool "IXP23XX-based"
 397         depends on MMU
 398         select CPU_XSC3
 399         select PCI
 400         help
 401           Support for Intel's IXP23xx (XScale) family of processors.
 402
 403 config ARCH_IXP2000
 404         bool "IXP2400/2800-based"
 405         depends on MMU
 406         select CPU_XSCALE
 407         select PCI
 408         help
 409           Support for Intel's IXP2400/2800 (XScale) family of processors.
 410
 411 config ARCH_IXP4XX
 412         bool "IXP4xx-based"
 413         depends on MMU
 414         select CPU_XSCALE
 415         select GENERIC_GPIO
 416         select GENERIC_TIME
 417         select GENERIC_CLOCKEVENTS
 418         select DMABOUNCE if PCI
 419         help
 420           Support for Intel's IXP4XX (XScale) family of processors.
 421
 422 config ARCH_L7200
 423         bool "LinkUp-L7200"
 424         select CPU_ARM720T
 425         select FIQ
 426         help
 427           Say Y here if you intend to run this kernel on a LinkUp Systems
 428           L7200 Software Development Board which uses an ARM720T processor.
 429           Information on this board can be obtained at:
 430
 431           <http://www.linkupsys.com/>
 432
 433           If you have any questions or comments about the Linux kernel port
 434           to this board, send e-mail to <sjhill@cotw.com>.
 435
 436 config ARCH_DOVE
 437         bool "Marvell Dove"
 438         select PCI
 439         select GENERIC_GPIO
 440         select ARCH_REQUIRE_GPIOLIB
 441         select GENERIC_TIME
 442         select GENERIC_CLOCKEVENTS
 443         select PLAT_ORION
 444         help
 445           Support for the Marvell Dove SoC 88AP510
 446
 447 config ARCH_KIRKWOOD
 448         bool "Marvell Kirkwood"
 449         select CPU_FEROCEON
 450         select PCI
 451         select GENERIC_GPIO
 452         select ARCH_REQUIRE_GPIOLIB
 453         select GENERIC_TIME
 454         select GENERIC_CLOCKEVENTS
 455         select PLAT_ORION
 456         help
 457           Support for the following Marvell Kirkwood series SoCs:
 458           88F6180, 88F6192 and 88F6281.
 459
 460 config ARCH_LOKI
 461         bool "Marvell Loki (88RC8480)"
 462         select CPU_FEROCEON
 463         select GENERIC_TIME
 464         select GENERIC_CLOCKEVENTS
 465         select PLAT_ORION
 466         help
 467           Support for the Marvell Loki (88RC8480) SoC.
 468
 469 config ARCH_MV78XX0
 470         bool "Marvell MV78xx0"
 471         select CPU_FEROCEON
 472         select PCI
 473         select GENERIC_GPIO
 474         select ARCH_REQUIRE_GPIOLIB
 475         select GENERIC_TIME
 476         select GENERIC_CLOCKEVENTS
 477         select PLAT_ORION
 478         help
 479           Support for the following Marvell MV78xx0 series SoCs:
 480           MV781x0, MV782x0.
 481
 482 config ARCH_ORION5X
 483         bool "Marvell Orion"
 484         depends on MMU
 485         select CPU_FEROCEON
 486         select PCI
 487         select GENERIC_GPIO
 488         select ARCH_REQUIRE_GPIOLIB
 489         select GENERIC_TIME
 490         select GENERIC_CLOCKEVENTS
 491         select PLAT_ORION
 492         help
 493           Support for the following Marvell Orion 5x series SoCs:
 494           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 495           Orion-2 (5281), Orion-1-90 (6183).
 496
 497 config ARCH_MMP
 498         bool "Marvell PXA168/910"
 499         depends on MMU
 500         select GENERIC_GPIO
 501         select ARCH_REQUIRE_GPIOLIB
 502         select HAVE_CLK
 503         select COMMON_CLKDEV
 504         select GENERIC_TIME
 505         select GENERIC_CLOCKEVENTS
 506         select TICK_ONESHOT
 507         select PLAT_PXA
 508         help
 509           Support for Marvell's PXA168/910 processor line.
 510
 511 config ARCH_KS8695
 512         bool "Micrel/Kendin KS8695"
 513         select CPU_ARM922T
 514         select GENERIC_GPIO
 515         select ARCH_REQUIRE_GPIOLIB
 516         help
 517           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 518           System-on-Chip devices.
 519
 520 config ARCH_NS9XXX
 521         bool "NetSilicon NS9xxx"
 522         select CPU_ARM926T
 523         select GENERIC_GPIO
 524         select GENERIC_TIME
 525         select GENERIC_CLOCKEVENTS
 526         select HAVE_CLK
 527         help
 528           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 529           System.
 530
 531           <http://www.digi.com/products/microprocessors/index.jsp>
 532
 533 config ARCH_W90X900
 534         bool "Nuvoton W90X900 CPU"
 535         select CPU_ARM926T
 536         select ARCH_REQUIRE_GPIOLIB
 537         select GENERIC_GPIO
 538         select HAVE_CLK
 539         select COMMON_CLKDEV
 540         select GENERIC_TIME
 541         select GENERIC_CLOCKEVENTS
 542         help
 543           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 544           At present, the w90x900 has been renamed nuc900, regarding
 545           the ARM series product line, you can login the following
 546           link address to know more.
 547
 548           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 549                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 550
 551 config ARCH_PNX4008
 552         bool "Philips Nexperia PNX4008 Mobile"
 553         select CPU_ARM926T
 554         select HAVE_CLK
 555         help
 556           This enables support for Philips PNX4008 mobile platform.
 557
 558 config ARCH_PXA
 559         bool "PXA2xx/PXA3xx-based"
 560         depends on MMU
 561         select ARCH_MTD_XIP
 562         select ARCH_HAS_CPUFREQ
 563         select GENERIC_GPIO
 564         select HAVE_CLK
 565         select COMMON_CLKDEV
 566         select ARCH_REQUIRE_GPIOLIB
 567         select GENERIC_TIME
 568         select GENERIC_CLOCKEVENTS
 569         select TICK_ONESHOT
 570         select PLAT_PXA
 571         help
 572           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 573
 574 config ARCH_MSM
 575         bool "Qualcomm MSM"
 576         select CPU_V6
 577         select GENERIC_TIME
 578         select GENERIC_CLOCKEVENTS
 579         help
 580           Support for Qualcomm MSM7K based systems.  This runs on the ARM11
 581           apps processor of the MSM7K and depends on a shared memory
 582           interface to the ARM9 modem processor which runs the baseband stack
 583           and controls some vital subsystems (clock and power control, etc).
 584
 585 config ARCH_RPC
 586         bool "RiscPC"
 587         select ARCH_ACORN
 588         select FIQ
 589         select TIMER_ACORN
 590         select ARCH_MAY_HAVE_PC_FDC
 591         select HAVE_PATA_PLATFORM
 592         select ISA_DMA_API
 593         select NO_IOPORT
 594         select ARCH_SPARSEMEM_ENABLE
 595         help
 596           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 597           CD-ROM interface, serial and parallel port, and the floppy drive.
 598
 599 config ARCH_SA1100
 600         bool "SA1100-based"
 601         select CPU_SA1100
 602         select ISA
 603         select ARCH_SPARSEMEM_ENABLE
 604         select ARCH_MTD_XIP
 605         select ARCH_HAS_CPUFREQ
 606         select GENERIC_GPIO
 607         select GENERIC_TIME
 608         select GENERIC_CLOCKEVENTS
 609         select HAVE_CLK
 610         select TICK_ONESHOT
 611         select ARCH_REQUIRE_GPIOLIB
 612         help
 613           Support for StrongARM 11x0 based boards.
 614
 615 config ARCH_S3C2410
 616         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 617         select GENERIC_GPIO
 618         select ARCH_HAS_CPUFREQ
 619         select HAVE_CLK
 620         help
 621           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 622           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 623           the Samsung SMDK2410 development board (and derivatives).
 624
 625 config ARCH_S3C64XX
 626         bool "Samsung S3C64XX"
 627         select GENERIC_GPIO
 628         select HAVE_CLK
 629         select ARCH_HAS_CPUFREQ
 630         help
 631           Samsung S3C64XX series based systems
 632
 633 config ARCH_S5PC1XX
 634         bool "Samsung S5PC1XX"
 635         select GENERIC_GPIO
 636         select HAVE_CLK
 637         select CPU_V7
 638         help
 639           Samsung S5PC1XX series based systems
 640
 641 config ARCH_SHARK
 642         bool "Shark"
 643         select CPU_SA110
 644         select ISA
 645         select ISA_DMA
 646         select ZONE_DMA
 647         select PCI
 648         help
 649           Support for the StrongARM based Digital DNARD machine, also known
 650           as "Shark" (<http://www.shark-linux.de/shark.html>).
 651
 652 config ARCH_LH7A40X
 653         bool "Sharp LH7A40X"
 654         select CPU_ARM922T
 655         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 656         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 657         help
 658           Say Y here for systems based on one of the Sharp LH7A40X
 659           System on a Chip processors.  These CPUs include an ARM922T
 660           core with a wide array of integrated devices for
 661           hand-held and low-power applications.
 662
 663 config ARCH_U300
 664         bool "ST-Ericsson U300 Series"
 665         depends on MMU
 666         select CPU_ARM926T
 667         select HAVE_TCM
 668         select ARM_AMBA
 669         select ARM_VIC
 670         select GENERIC_TIME
 671         select GENERIC_CLOCKEVENTS
 672         select HAVE_CLK
 673         select COMMON_CLKDEV
 674         select GENERIC_GPIO
 675         help
 676           Support for ST-Ericsson U300 series mobile platforms.
 677
 678 config ARCH_DAVINCI
 679         bool "TI DaVinci"
 680         select CPU_ARM926T
 681         select GENERIC_TIME
 682         select GENERIC_CLOCKEVENTS
 683         select GENERIC_GPIO
 684         select ARCH_REQUIRE_GPIOLIB
 685         select HAVE_CLK
 686         select ZONE_DMA
 687         select HAVE_IDE
 688         select COMMON_CLKDEV
 689         select GENERIC_ALLOCATOR
 690         help
 691           Support for TI's DaVinci platform.
 692
 693 config ARCH_OMAP
 694         bool "TI OMAP"
 695         select GENERIC_GPIO
 696         select HAVE_CLK
 697         select ARCH_REQUIRE_GPIOLIB
 698         select ARCH_HAS_CPUFREQ
 699         select GENERIC_TIME
 700         select GENERIC_CLOCKEVENTS
 701         help
 702           Support for TI's OMAP platform (OMAP1 and OMAP2).
 703
 704 config ARCH_BCMRING
 705         bool "Broadcom BCMRING"
 706         depends on MMU
 707         select CPU_V6
 708         select ARM_AMBA
 709         select COMMON_CLKDEV
 710         select GENERIC_TIME
 711         select GENERIC_CLOCKEVENTS
 712         select ARCH_WANT_OPTIONAL_GPIOLIB
 713         help
 714           Support for Broadcom's BCMRing platform.
 715
 716 config ARCH_U8500
 717         bool "ST-Ericsson U8500 Series"
 718         select CPU_V7
 719         select ARM_AMBA
 720         select GENERIC_TIME
 721         select GENERIC_CLOCKEVENTS
 722         select COMMON_CLKDEV
 723         help
 724           Support for ST-Ericsson's Ux500 architecture
 725
 726 endchoice
 727
 728 source "arch/arm/mach-clps711x/Kconfig"
 729
 730 source "arch/arm/mach-ep93xx/Kconfig"
 731
 732 source "arch/arm/mach-footbridge/Kconfig"
 733
 734 source "arch/arm/mach-gemini/Kconfig"
 735
 736 source "arch/arm/mach-integrator/Kconfig"
 737
 738 source "arch/arm/mach-iop32x/Kconfig"
 739
 740 source "arch/arm/mach-iop33x/Kconfig"
 741
 742 source "arch/arm/mach-iop13xx/Kconfig"
 743
 744 source "arch/arm/mach-ixp4xx/Kconfig"
 745
 746 source "arch/arm/mach-ixp2000/Kconfig"
 747
 748 source "arch/arm/mach-ixp23xx/Kconfig"
 749
 750 source "arch/arm/mach-loki/Kconfig"
 751
 752 source "arch/arm/mach-mv78xx0/Kconfig"
 753
 754 source "arch/arm/mach-pxa/Kconfig"
 755 source "arch/arm/plat-pxa/Kconfig"
 756
 757 source "arch/arm/mach-mmp/Kconfig"
 758
 759 source "arch/arm/mach-sa1100/Kconfig"
 760
 761 source "arch/arm/plat-omap/Kconfig"
 762
 763 source "arch/arm/mach-omap1/Kconfig"
 764
 765 source "arch/arm/mach-omap2/Kconfig"
 766
 767 source "arch/arm/mach-orion5x/Kconfig"
 768
 769 source "arch/arm/mach-kirkwood/Kconfig"
 770
 771 source "arch/arm/mach-dove/Kconfig"
 772
 773 source "arch/arm/plat-samsung/Kconfig"
 774 source "arch/arm/plat-s3c24xx/Kconfig"
 775 source "arch/arm/plat-s3c64xx/Kconfig"
 776 source "arch/arm/plat-s3c/Kconfig"
 777 source "arch/arm/plat-s5pc1xx/Kconfig"
 778
 779 if ARCH_S3C2410
 780 source "arch/arm/mach-s3c2400/Kconfig"
 781 source "arch/arm/mach-s3c2410/Kconfig"
 782 source "arch/arm/mach-s3c2412/Kconfig"
 783 source "arch/arm/mach-s3c2440/Kconfig"
 784 source "arch/arm/mach-s3c2442/Kconfig"
 785 source "arch/arm/mach-s3c2443/Kconfig"
 786 endif
 787
 788 if ARCH_S3C64XX
 789 source "arch/arm/mach-s3c6400/Kconfig"
 790 source "arch/arm/mach-s3c6410/Kconfig"
 791 endif
 792
 793 source "arch/arm/plat-stmp3xxx/Kconfig"
 794
 795 if ARCH_S5PC1XX
 796 source "arch/arm/mach-s5pc100/Kconfig"
 797 endif
 798
 799 source "arch/arm/mach-lh7a40x/Kconfig"
 800
 801 source "arch/arm/mach-h720x/Kconfig"
 802
 803 source "arch/arm/mach-versatile/Kconfig"
 804
 805 source "arch/arm/mach-aaec2000/Kconfig"
 806
 807 source "arch/arm/mach-realview/Kconfig"
 808
 809 source "arch/arm/mach-at91/Kconfig"
 810
 811 source "arch/arm/plat-mxc/Kconfig"
 812
 813 source "arch/arm/mach-nomadik/Kconfig"
 814 source "arch/arm/plat-nomadik/Kconfig"
 815
 816 source "arch/arm/mach-netx/Kconfig"
 817
 818 source "arch/arm/mach-ns9xxx/Kconfig"
 819
 820 source "arch/arm/mach-davinci/Kconfig"
 821
 822 source "arch/arm/mach-ks8695/Kconfig"
 823
 824 source "arch/arm/mach-msm/Kconfig"
 825
 826 source "arch/arm/mach-u300/Kconfig"
 827
 828 source "arch/arm/mach-w90x900/Kconfig"
 829
 830 source "arch/arm/mach-bcmring/Kconfig"
 831
 832 source "arch/arm/mach-ux500/Kconfig"
 833
 834 # Definitions to make life easier
 835 config ARCH_ACORN
 836         bool
 837
 838 config PLAT_IOP
 839         bool
 840         select GENERIC_CLOCKEVENTS
 841         select GENERIC_TIME
 842
 843 config PLAT_ORION
 844         bool
 845
 846 config PLAT_PXA
 847         bool
 848
 849 source arch/arm/mm/Kconfig
 850
 851 config IWMMXT
 852         bool "Enable iWMMXt support"
 853         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 854         default y if PXA27x || PXA3xx || ARCH_MMP
 855         help
 856           Enable support for iWMMXt context switching at run time if
 857           running on a CPU that supports it.
 858
 859 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 860 config XSCALE_PMU
 861         bool
 862         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 863         default y
 864
 865 if !MMU
 866 source "arch/arm/Kconfig-nommu"
 867 endif
 868
 869 config ARM_ERRATA_411920
 870         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 871         depends on CPU_V6 && !SMP
 872         help
 873           Invalidation of the Instruction Cache operation can
 874           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 875           It does not affect the MPCore. This option enables the ARM Ltd.
 876           recommended workaround.
 877
 878 config ARM_ERRATA_430973
 879         bool "ARM errata: Stale prediction on replaced interworking branch"
 880         depends on CPU_V7
 881         help
 882           This option enables the workaround for the 430973 Cortex-A8
 883           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 884           interworking branch is replaced with another code sequence at the
 885           same virtual address, whether due to self-modifying code or virtual
 886           to physical address re-mapping, Cortex-A8 does not recover from the
 887           stale interworking branch prediction. This results in Cortex-A8
 888           executing the new code sequence in the incorrect ARM or Thumb state.
 889           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 890           and also flushes the branch target cache at every context switch.
 891           Note that setting specific bits in the ACTLR register may not be
 892           available in non-secure mode.
 893
 894 config ARM_ERRATA_458693
 895         bool "ARM errata: Processor deadlock when a false hazard is created"
 896         depends on CPU_V7
 897         help
 898           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
 899           erratum. For very specific sequences of memory operations, it is
 900           possible for a hazard condition intended for a cache line to instead
 901           be incorrectly associated with a different cache line. This false
 902           hazard might then cause a processor deadlock. The workaround enables
 903           the L1 caching of the NEON accesses and disables the PLD instruction
 904           in the ACTLR register. Note that setting specific bits in the ACTLR
 905           register may not be available in non-secure mode.
 906
 907 config ARM_ERRATA_460075
 908         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
 909         depends on CPU_V7
 910         help
 911           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
 912           erratum. Any asynchronous access to the L2 cache may encounter a
 913           situation in which recent store transactions to the L2 cache are lost
 914           and overwritten with stale memory contents from external memory. The
 915           workaround disables the write-allocate mode for the L2 cache via the
 916           ACTLR register. Note that setting specific bits in the ACTLR register
 917           may not be available in non-secure mode.
 918
 919 endmenu
 920
 921 source "arch/arm/common/Kconfig"
 922
 923 config FORCE_MAX_ZONEORDER
 924         int
 925         depends on SA1111
 926         default "9"
 927
 928 menu "Bus support"
 929
 930 config ARM_AMBA
 931         bool
 932
 933 config ISA
 934         bool
 935         help
 936           Find out whether you have ISA slots on your motherboard.  ISA is the
 937           name of a bus system, i.e. the way the CPU talks to the other stuff
 938           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 939           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 940           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 941
 942 # Select ISA DMA controller support
 943 config ISA_DMA
 944         bool
 945         select ISA_DMA_API
 946
 947 # Select ISA DMA interface
 948 config ISA_DMA_API
 949         bool
 950
 951 config PCI
 952         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
 953         help
 954           Find out whether you have a PCI motherboard. PCI is the name of a
 955           bus system, i.e. the way the CPU talks to the other stuff inside
 956           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 957           VESA. If you have PCI, say Y, otherwise N.
 958
 959 config PCI_SYSCALL
 960         def_bool PCI
 961
 962 # Select the host bridge type
 963 config PCI_HOST_VIA82C505
 964         bool
 965         depends on PCI && ARCH_SHARK
 966         default y
 967
 968 config PCI_HOST_ITE8152
 969         bool
 970         depends on PCI && MACH_ARMCORE
 971         default y
 972         select DMABOUNCE
 973
 974 source "drivers/pci/Kconfig"
 975
 976 source "drivers/pcmcia/Kconfig"
 977
 978 endmenu
 979
 980 menu "Kernel Features"
 981
 982 source "kernel/time/Kconfig"
 983
 984 config SMP
 985         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 986         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
 987                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
 988         depends on GENERIC_CLOCKEVENTS
 989         select USE_GENERIC_SMP_HELPERS
 990         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
 991         help
 992           This enables support for systems with more than one CPU. If you have
 993           a system with only one CPU, like most personal computers, say N. If
 994           you have a system with more than one CPU, say Y.
 995
 996           If you say N here, the kernel will run on single and multiprocessor
 997           machines, but will use only one CPU of a multiprocessor machine. If
 998           you say Y here, the kernel will run on many, but not all, single
 999           processor machines. On a single processor machine, the kernel will
1000           run faster if you say N here.
1001
1002           See also <file:Documentation/i386/IO-APIC.txt>,
1003           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1004           <http://www.linuxdoc.org/docs.html#howto>.
1005
1006           If you don't know what to do here, say N.
1007
1008 config HAVE_ARM_SCU
1009         bool
1010         depends on SMP
1011         help
1012           This option enables support for the ARM system coherency unit
1013
1014 config HAVE_ARM_TWD
1015         bool
1016         depends on SMP
1017         help
1018           This options enables support for the ARM timer and watchdog unit
1019
1020 choice
1021         prompt "Memory split"
1022         default VMSPLIT_3G
1023         help
1024           Select the desired split between kernel and user memory.
1025
1026           If you are not absolutely sure what you are doing, leave this
1027           option alone!
1028
1029         config VMSPLIT_3G
1030                 bool "3G/1G user/kernel split"
1031         config VMSPLIT_2G
1032                 bool "2G/2G user/kernel split"
1033         config VMSPLIT_1G
1034                 bool "1G/3G user/kernel split"
1035 endchoice
1036
1037 config PAGE_OFFSET
1038         hex
1039         default 0x40000000 if VMSPLIT_1G
1040         default 0x80000000 if VMSPLIT_2G
1041         default 0xC0000000
1042
1043 config NR_CPUS
1044         int "Maximum number of CPUs (2-32)"
1045         range 2 32
1046         depends on SMP
1047         default "4"
1048
1049 config HOTPLUG_CPU
1050         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1051         depends on SMP && HOTPLUG && EXPERIMENTAL
1052         help
1053           Say Y here to experiment with turning CPUs off and on.  CPUs
1054           can be controlled through /sys/devices/system/cpu.
1055
1056 config LOCAL_TIMERS
1057         bool "Use local timer interrupts"
1058         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1059                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1060         default y
1061         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1062         help
1063           Enable support for local timers on SMP platforms, rather then the
1064           legacy IPI broadcast method.  Local timers allows the system
1065           accounting to be spread across the timer interval, preventing a
1066           "thundering herd" at every timer tick.
1067
1068 source kernel/Kconfig.preempt
1069
1070 config HZ
1071         int
1072         default 128 if ARCH_L7200
1073         default 200 if ARCH_EBSA110 || ARCH_S3C2410
1074         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1075         default AT91_TIMER_HZ if ARCH_AT91
1076         default 100
1077
1078 config THUMB2_KERNEL
1079         bool "Compile the kernel in Thumb-2 mode"
1080         depends on CPU_V7 && EXPERIMENTAL
1081         select AEABI
1082         select ARM_ASM_UNIFIED
1083         help
1084           By enabling this option, the kernel will be compiled in
1085           Thumb-2 mode. A compiler/assembler that understand the unified
1086           ARM-Thumb syntax is needed.
1087
1088           If unsure, say N.
1089
1090 config ARM_ASM_UNIFIED
1091         bool
1092
1093 config AEABI
1094         bool "Use the ARM EABI to compile the kernel"
1095         help
1096           This option allows for the kernel to be compiled using the latest
1097           ARM ABI (aka EABI).  This is only useful if you are using a user
1098           space environment that is also compiled with EABI.
1099
1100           Since there are major incompatibilities between the legacy ABI and
1101           EABI, especially with regard to structure member alignment, this
1102           option also changes the kernel syscall calling convention to
1103           disambiguate both ABIs and allow for backward compatibility support
1104           (selected with CONFIG_OABI_COMPAT).
1105
1106           To use this you need GCC version 4.0.0 or later.
1107
1108 config OABI_COMPAT
1109         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1110         depends on AEABI && EXPERIMENTAL
1111         default y
1112         help
1113           This option preserves the old syscall interface along with the
1114           new (ARM EABI) one. It also provides a compatibility layer to
1115           intercept syscalls that have structure arguments which layout
1116           in memory differs between the legacy ABI and the new ARM EABI
1117           (only for non "thumb" binaries). This option adds a tiny
1118           overhead to all syscalls and produces a slightly larger kernel.
1119           If you know you'll be using only pure EABI user space then you
1120           can say N here. If this option is not selected and you attempt
1121           to execute a legacy ABI binary then the result will be
1122           UNPREDICTABLE (in fact it can be predicted that it won't work
1123           at all). If in doubt say Y.
1124
1125 config ARCH_HAS_HOLES_MEMORYMODEL
1126         bool
1127
1128 # Discontigmem is deprecated
1129 config ARCH_DISCONTIGMEM_ENABLE
1130         bool
1131
1132 config ARCH_SPARSEMEM_ENABLE
1133         bool
1134
1135 config ARCH_SPARSEMEM_DEFAULT
1136         def_bool ARCH_SPARSEMEM_ENABLE
1137
1138 config ARCH_SELECT_MEMORY_MODEL
1139         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1140
1141 config NODES_SHIFT
1142         int
1143         default "4" if ARCH_LH7A40X
1144         default "2"
1145         depends on NEED_MULTIPLE_NODES
1146
1147 config HIGHMEM
1148         bool "High Memory Support (EXPERIMENTAL)"
1149         depends on MMU && EXPERIMENTAL
1150         help
1151           The address space of ARM processors is only 4 Gigabytes large
1152           and it has to accommodate user address space, kernel address
1153           space as well as some memory mapped IO. That means that, if you
1154           have a large amount of physical memory and/or IO, not all of the
1155           memory can be "permanently mapped" by the kernel. The physical
1156           memory that is not permanently mapped is called "high memory".
1157
1158           Depending on the selected kernel/user memory split, minimum
1159           vmalloc space and actual amount of RAM, you may not need this
1160           option which should result in a slightly faster kernel.
1161
1162           If unsure, say n.
1163
1164 config HIGHPTE
1165         bool "Allocate 2nd-level pagetables from highmem"
1166         depends on HIGHMEM
1167         depends on !OUTER_CACHE
1168
1169 source "mm/Kconfig"
1170
1171 config LEDS
1172         bool "Timer and CPU usage LEDs"
1173         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1174                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1175                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1176                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1177                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1178                    ARCH_AT91 || ARCH_DAVINCI || \
1179                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1180         help
1181           If you say Y here, the LEDs on your machine will be used
1182           to provide useful information about your current system status.
1183
1184           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1185           be able to select which LEDs are active using the options below. If
1186           you are compiling a kernel for the EBSA-110 or the LART however, the
1187           red LED will simply flash regularly to indicate that the system is
1188           still functional. It is safe to say Y here if you have a CATS
1189           system, but the driver will do nothing.
1190
1191 config LEDS_TIMER
1192         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1193                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1194                             || MACH_OMAP_PERSEUS2
1195         depends on LEDS
1196         depends on !GENERIC_CLOCKEVENTS
1197         default y if ARCH_EBSA110
1198         help
1199           If you say Y here, one of the system LEDs (the green one on the
1200           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1201           will flash regularly to indicate that the system is still
1202           operational. This is mainly useful to kernel hackers who are
1203           debugging unstable kernels.
1204
1205           The LART uses the same LED for both Timer LED and CPU usage LED
1206           functions. You may choose to use both, but the Timer LED function
1207           will overrule the CPU usage LED.
1208
1209 config LEDS_CPU
1210         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1211                         !ARCH_OMAP) \
1212                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1213                         || MACH_OMAP_PERSEUS2
1214         depends on LEDS
1215         help
1216           If you say Y here, the red LED will be used to give a good real
1217           time indication of CPU usage, by lighting whenever the idle task
1218           is not currently executing.
1219
1220           The LART uses the same LED for both Timer LED and CPU usage LED
1221           functions. You may choose to use both, but the Timer LED function
1222           will overrule the CPU usage LED.
1223
1224 config ALIGNMENT_TRAP
1225         bool
1226         depends on CPU_CP15_MMU
1227         default y if !ARCH_EBSA110
1228         help
1229           ARM processors cannot fetch/store information which is not
1230           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1231           address divisible by 4. On 32-bit ARM processors, these non-aligned
1232           fetch/store instructions will be emulated in software if you say
1233           here, which has a severe performance impact. This is necessary for
1234           correct operation of some network protocols. With an IP-only
1235           configuration it is safe to say N, otherwise say Y.
1236
1237 config UACCESS_WITH_MEMCPY
1238         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1239         depends on MMU && EXPERIMENTAL
1240         default y if CPU_FEROCEON
1241         help
1242           Implement faster copy_to_user and clear_user methods for CPU
1243           cores where a 8-word STM instruction give significantly higher
1244           memory write throughput than a sequence of individual 32bit stores.
1245
1246           A possible side effect is a slight increase in scheduling latency
1247           between threads sharing the same address space if they invoke
1248           such copy operations with large buffers.
1249
1250           However, if the CPU data cache is using a write-allocate mode,
1251           this option is unlikely to provide any performance gain.
1252
1253 endmenu
1254
1255 menu "Boot options"
1256
1257 # Compressed boot loader in ROM.  Yes, we really want to ask about
1258 # TEXT and BSS so we preserve their values in the config files.
1259 config ZBOOT_ROM_TEXT
1260         hex "Compressed ROM boot loader base address"
1261         default "0"
1262         help
1263           The physical address at which the ROM-able zImage is to be
1264           placed in the target.  Platforms which normally make use of
1265           ROM-able zImage formats normally set this to a suitable
1266           value in their defconfig file.
1267
1268           If ZBOOT_ROM is not enabled, this has no effect.
1269
1270 config ZBOOT_ROM_BSS
1271         hex "Compressed ROM boot loader BSS address"
1272         default "0"
1273         help
1274           The base address of an area of read/write memory in the target
1275           for the ROM-able zImage which must be available while the
1276           decompressor is running. It must be large enough to hold the
1277           entire decompressed kernel plus an additional 128 KiB.
1278           Platforms which normally make use of ROM-able zImage formats
1279           normally set this to a suitable value in their defconfig file.
1280
1281           If ZBOOT_ROM is not enabled, this has no effect.
1282
1283 config ZBOOT_ROM
1284         bool "Compressed boot loader in ROM/flash"
1285         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1286         help
1287           Say Y here if you intend to execute your compressed kernel image
1288           (zImage) directly from ROM or flash.  If unsure, say N.
1289
1290 config CMDLINE
1291         string "Default kernel command string"
1292         default ""
1293         help
1294           On some architectures (EBSA110 and CATS), there is currently no way
1295           for the boot loader to pass arguments to the kernel. For these
1296           architectures, you should supply some command-line options at build
1297           time by entering them here. As a minimum, you should specify the
1298           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1299
1300 config XIP_KERNEL
1301         bool "Kernel Execute-In-Place from ROM"
1302         depends on !ZBOOT_ROM
1303         help
1304           Execute-In-Place allows the kernel to run from non-volatile storage
1305           directly addressable by the CPU, such as NOR flash. This saves RAM
1306           space since the text section of the kernel is not loaded from flash
1307           to RAM.  Read-write sections, such as the data section and stack,
1308           are still copied to RAM.  The XIP kernel is not compressed since
1309           it has to run directly from flash, so it will take more space to
1310           store it.  The flash address used to link the kernel object files,
1311           and for storing it, is configuration dependent. Therefore, if you
1312           say Y here, you must know the proper physical address where to
1313           store the kernel image depending on your own flash memory usage.
1314
1315           Also note that the make target becomes "make xipImage" rather than
1316           "make zImage" or "make Image".  The final kernel binary to put in
1317           ROM memory will be arch/arm/boot/xipImage.
1318
1319           If unsure, say N.
1320
1321 config XIP_PHYS_ADDR
1322         hex "XIP Kernel Physical Location"
1323         depends on XIP_KERNEL
1324         default "0x00080000"
1325         help
1326           This is the physical address in your flash memory the kernel will
1327           be linked for and stored to.  This address is dependent on your
1328           own flash usage.
1329
1330 config KEXEC
1331         bool "Kexec system call (EXPERIMENTAL)"
1332         depends on EXPERIMENTAL
1333         help
1334           kexec is a system call that implements the ability to shutdown your
1335           current kernel, and to start another kernel.  It is like a reboot
1336           but it is independent of the system firmware.   And like a reboot
1337           you can start any kernel with it, not just Linux.
1338
1339           It is an ongoing process to be certain the hardware in a machine
1340           is properly shutdown, so do not be surprised if this code does not
1341           initially work for you.  It may help to enable device hotplugging
1342           support.
1343
1344 config ATAGS_PROC
1345         bool "Export atags in procfs"
1346         depends on KEXEC
1347         default y
1348         help
1349           Should the atags used to boot the kernel be exported in an "atags"
1350           file in procfs. Useful with kexec.
1351
1352 endmenu
1353
1354 menu "CPU Power Management"
1355
1356 if ARCH_HAS_CPUFREQ
1357
1358 source "drivers/cpufreq/Kconfig"
1359
1360 config CPU_FREQ_SA1100
1361         bool
1362         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1363         default y
1364
1365 config CPU_FREQ_SA1110
1366         bool
1367         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1368         default y
1369
1370 config CPU_FREQ_INTEGRATOR
1371         tristate "CPUfreq driver for ARM Integrator CPUs"
1372         depends on ARCH_INTEGRATOR && CPU_FREQ
1373         default y
1374         help
1375           This enables the CPUfreq driver for ARM Integrator CPUs.
1376
1377           For details, take a look at <file:Documentation/cpu-freq>.
1378
1379           If in doubt, say Y.
1380
1381 config CPU_FREQ_PXA
1382         bool
1383         depends on CPU_FREQ && ARCH_PXA && PXA25x
1384         default y
1385         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1386
1387 config CPU_FREQ_S3C64XX
1388         bool "CPUfreq support for Samsung S3C64XX CPUs"
1389         depends on CPU_FREQ && CPU_S3C6410
1390
1391 config CPU_FREQ_S3C
1392         bool
1393         help
1394           Internal configuration node for common cpufreq on Samsung SoC
1395
1396 config CPU_FREQ_S3C24XX
1397         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1398         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1399         select CPU_FREQ_S3C
1400         help
1401           This enables the CPUfreq driver for the Samsung S3C24XX family
1402           of CPUs.
1403
1404           For details, take a look at <file:Documentation/cpu-freq>.
1405
1406           If in doubt, say N.
1407
1408 config CPU_FREQ_S3C24XX_PLL
1409         bool "Support CPUfreq changing of PLL frequency"
1410         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1411         help
1412           Compile in support for changing the PLL frequency from the
1413           S3C24XX series CPUfreq driver. The PLL takes time to settle
1414           after a frequency change, so by default it is not enabled.
1415
1416           This also means that the PLL tables for the selected CPU(s) will
1417           be built which may increase the size of the kernel image.
1418
1419 config CPU_FREQ_S3C24XX_DEBUG
1420         bool "Debug CPUfreq Samsung driver core"
1421         depends on CPU_FREQ_S3C24XX
1422         help
1423           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1424
1425 config CPU_FREQ_S3C24XX_IODEBUG
1426         bool "Debug CPUfreq Samsung driver IO timing"
1427         depends on CPU_FREQ_S3C24XX
1428         help
1429           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1430
1431 config CPU_FREQ_S3C24XX_DEBUGFS
1432         bool "Export debugfs for CPUFreq"
1433         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1434         help
1435           Export status information via debugfs.
1436
1437 endif
1438
1439 source "drivers/cpuidle/Kconfig"
1440
1441 endmenu
1442
1443 menu "Floating point emulation"
1444
1445 comment "At least one emulation must be selected"
1446
1447 config FPE_NWFPE
1448         bool "NWFPE math emulation"
1449         depends on !AEABI || OABI_COMPAT
1450         ---help---
1451           Say Y to include the NWFPE floating point emulator in the kernel.
1452           This is necessary to run most binaries. Linux does not currently
1453           support floating point hardware so you need to say Y here even if
1454           your machine has an FPA or floating point co-processor podule.
1455
1456           You may say N here if you are going to load the Acorn FPEmulator
1457           early in the bootup.
1458
1459 config FPE_NWFPE_XP
1460         bool "Support extended precision"
1461         depends on FPE_NWFPE
1462         help
1463           Say Y to include 80-bit support in the kernel floating-point
1464           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1465           Note that gcc does not generate 80-bit operations by default,
1466           so in most cases this option only enlarges the size of the
1467           floating point emulator without any good reason.
1468
1469           You almost surely want to say N here.
1470
1471 config FPE_FASTFPE
1472         bool "FastFPE math emulation (EXPERIMENTAL)"
1473         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1474         ---help---
1475           Say Y here to include the FAST floating point emulator in the kernel.
1476           This is an experimental much faster emulator which now also has full
1477           precision for the mantissa.  It does not support any exceptions.
1478           It is very simple, and approximately 3-6 times faster than NWFPE.
1479
1480           It should be sufficient for most programs.  It may be not suitable
1481           for scientific calculations, but you have to check this for yourself.
1482           If you do not feel you need a faster FP emulation you should better
1483           choose NWFPE.
1484
1485 config VFP
1486         bool "VFP-format floating point maths"
1487         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1488         help
1489           Say Y to include VFP support code in the kernel. This is needed
1490           if your hardware includes a VFP unit.
1491
1492           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1493           release notes and additional status information.
1494
1495           Say N if your target does not have VFP hardware.
1496
1497 config VFPv3
1498         bool
1499         depends on VFP
1500         default y if CPU_V7
1501
1502 config NEON
1503         bool "Advanced SIMD (NEON) Extension support"
1504         depends on VFPv3 && CPU_V7
1505         help
1506           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1507           Extension.
1508
1509 endmenu
1510
1511 menu "Userspace binary formats"
1512
1513 source "fs/Kconfig.binfmt"
1514
1515 config ARTHUR
1516         tristate "RISC OS personality"
1517         depends on !AEABI
1518         help
1519           Say Y here to include the kernel code necessary if you want to run
1520           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1521           experimental; if this sounds frightening, say N and sleep in peace.
1522           You can also say M here to compile this support as a module (which
1523           will be called arthur).
1524
1525 endmenu
1526
1527 menu "Power management options"
1528
1529 source "kernel/power/Kconfig"
1530
1531 config ARCH_SUSPEND_POSSIBLE
1532         def_bool y
1533
1534 endmenu
1535
1536 source "net/Kconfig"
1537
1538 source "drivers/Kconfig"
1539
1540 source "fs/Kconfig"
1541
1542 source "arch/arm/Kconfig.debug"
1543
1544 source "security/Kconfig"
1545
1546 source "crypto/Kconfig"
1547
1548 source "lib/Kconfig"