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 GENERIC_ATOMIC64 if (!CPU_32v6K)
  16         select HAVE_OPROFILE
  17         select HAVE_ARCH_KGDB
  18         select HAVE_KPROBES if (!XIP_KERNEL)
  19         select HAVE_KRETPROBES if (HAVE_KPROBES)
  20         select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  21         select HAVE_GENERIC_DMA_COHERENT
  22         select HAVE_KERNEL_GZIP
  23         select HAVE_KERNEL_LZO
  24         select HAVE_PERF_EVENTS
  25         select PERF_USE_VMALLOC
  26         help
  27           The ARM series is a line of low-power-consumption RISC chip designs
  28           licensed by ARM Ltd and targeted at embedded applications and
  29           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  30           manufactured, but legacy ARM-based PC hardware remains popular in
  31           Europe.  There is an ARM Linux project with a web page at
  32           <http://www.arm.linux.org.uk/>.
  33
  34 config HAVE_PWM
  35         bool
  36
  37 config SYS_SUPPORTS_APM_EMULATION
  38         bool
  39
  40 config GENERIC_GPIO
  41         bool
  42
  43 config GENERIC_TIME
  44         bool
  45
  46 config GENERIC_CLOCKEVENTS
  47         bool
  48
  49 config GENERIC_CLOCKEVENTS_BROADCAST
  50         bool
  51         depends on GENERIC_CLOCKEVENTS
  52         default y if SMP && !LOCAL_TIMERS
  53
  54 config HAVE_TCM
  55         bool
  56         select GENERIC_ALLOCATOR
  57
  58 config HAVE_PROC_CPU
  59         bool
  60
  61 config NO_IOPORT
  62         bool
  63
  64 config EISA
  65         bool
  66         ---help---
  67           The Extended Industry Standard Architecture (EISA) bus was
  68           developed as an open alternative to the IBM MicroChannel bus.
  69
  70           The EISA bus provided some of the features of the IBM MicroChannel
  71           bus while maintaining backward compatibility with cards made for
  72           the older ISA bus.  The EISA bus saw limited use between 1988 and
  73           1995 when it was made obsolete by the PCI bus.
  74
  75           Say Y here if you are building a kernel for an EISA-based machine.
  76
  77           Otherwise, say N.
  78
  79 config SBUS
  80         bool
  81
  82 config MCA
  83         bool
  84         help
  85           MicroChannel Architecture is found in some IBM PS/2 machines and
  86           laptops.  It is a bus system similar to PCI or ISA. See
  87           <file:Documentation/mca.txt> (and especially the web page given
  88           there) before attempting to build an MCA bus kernel.
  89
  90 config GENERIC_HARDIRQS
  91         bool
  92         default y
  93
  94 config STACKTRACE_SUPPORT
  95         bool
  96         default y
  97
  98 config HAVE_LATENCYTOP_SUPPORT
  99         bool
 100         depends on !SMP
 101         default y
 102
 103 config LOCKDEP_SUPPORT
 104         bool
 105         default y
 106
 107 config TRACE_IRQFLAGS_SUPPORT
 108         bool
 109         default y
 110
 111 config HARDIRQS_SW_RESEND
 112         bool
 113         default y
 114
 115 config GENERIC_IRQ_PROBE
 116         bool
 117         default y
 118
 119 config GENERIC_LOCKBREAK
 120         bool
 121         default y
 122         depends on SMP && PREEMPT
 123
 124 config RWSEM_GENERIC_SPINLOCK
 125         bool
 126         default y
 127
 128 config RWSEM_XCHGADD_ALGORITHM
 129         bool
 130
 131 config ARCH_HAS_ILOG2_U32
 132         bool
 133
 134 config ARCH_HAS_ILOG2_U64
 135         bool
 136
 137 config ARCH_HAS_CPUFREQ
 138         bool
 139         help
 140           Internal node to signify that the ARCH has CPUFREQ support
 141           and that the relevant menu configurations are displayed for
 142           it.
 143
 144 config GENERIC_HWEIGHT
 145         bool
 146         default y
 147
 148 config GENERIC_CALIBRATE_DELAY
 149         bool
 150         default y
 151
 152 config ARCH_MAY_HAVE_PC_FDC
 153         bool
 154
 155 config ZONE_DMA
 156         bool
 157
 158 config GENERIC_ISA_DMA
 159         bool
 160
 161 config FIQ
 162         bool
 163
 164 config ARCH_MTD_XIP
 165         bool
 166
 167 config GENERIC_HARDIRQS_NO__DO_IRQ
 168         def_bool y
 169
 170 config ARM_L1_CACHE_SHIFT_6
 171         bool
 172         help
 173           Setting ARM L1 cache line size to 64 Bytes.
 174
 175 if OPROFILE
 176
 177 config OPROFILE_ARMV6
 178         def_bool y
 179         depends on CPU_V6 && !SMP
 180         select OPROFILE_ARM11_CORE
 181
 182 config OPROFILE_MPCORE
 183         def_bool y
 184         depends on CPU_V6 && SMP
 185         select OPROFILE_ARM11_CORE
 186
 187 config OPROFILE_ARM11_CORE
 188         bool
 189
 190 config OPROFILE_ARMV7
 191         def_bool y
 192         depends on CPU_V7 && !SMP
 193         bool
 194
 195 endif
 196
 197 config VECTORS_BASE
 198         hex
 199         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 200         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 201         default 0x00000000
 202         help
 203           The base address of exception vectors.
 204
 205 source "init/Kconfig"
 206
 207 source "kernel/Kconfig.freezer"
 208
 209 menu "System Type"
 210
 211 config MMU
 212         bool "MMU-based Paged Memory Management Support"
 213         default y
 214         help
 215           Select if you want MMU-based virtualised addressing space
 216           support by paged memory management. If unsure, say 'Y'.
 217
 218 choice
 219         prompt "ARM system type"
 220         default ARCH_VERSATILE
 221
 222 config ARCH_AAEC2000
 223         bool "Agilent AAEC-2000 based"
 224         select CPU_ARM920T
 225         select ARM_AMBA
 226         select HAVE_CLK
 227         help
 228           This enables support for systems based on the Agilent AAEC-2000
 229
 230 config ARCH_INTEGRATOR
 231         bool "ARM Ltd. Integrator family"
 232         select ARM_AMBA
 233         select ARCH_HAS_CPUFREQ
 234         select HAVE_CLK
 235         select COMMON_CLKDEV
 236         select ICST525
 237         help
 238           Support for ARM's Integrator platform.
 239
 240 config ARCH_REALVIEW
 241         bool "ARM Ltd. RealView family"
 242         select ARM_AMBA
 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 RealView boards.
 251
 252 config ARCH_VERSATILE
 253         bool "ARM Ltd. Versatile family"
 254         select ARM_AMBA
 255         select ARM_VIC
 256         select HAVE_CLK
 257         select COMMON_CLKDEV
 258         select ICST307
 259         select GENERIC_TIME
 260         select GENERIC_CLOCKEVENTS
 261         select ARCH_WANT_OPTIONAL_GPIOLIB
 262         help
 263           This enables support for ARM Ltd Versatile board.
 264
 265 config ARCH_AT91
 266         bool "Atmel AT91"
 267         select GENERIC_GPIO
 268         select ARCH_REQUIRE_GPIOLIB
 269         select HAVE_CLK
 270         help
 271           This enables support for systems based on the Atmel AT91RM9200,
 272           AT91SAM9 and AT91CAP9 processors.
 273
 274 config ARCH_CLPS711X
 275         bool "Cirrus Logic CLPS711x/EP721x-based"
 276         select CPU_ARM720T
 277         help
 278           Support for Cirrus Logic 711x/721x based boards.
 279
 280 config ARCH_GEMINI
 281         bool "Cortina Systems Gemini"
 282         select CPU_FA526
 283         select GENERIC_GPIO
 284         select ARCH_REQUIRE_GPIOLIB
 285         help
 286           Support for the Cortina Systems Gemini family SoCs
 287
 288 config ARCH_EBSA110
 289         bool "EBSA-110"
 290         select CPU_SA110
 291         select ISA
 292         select NO_IOPORT
 293         help
 294           This is an evaluation board for the StrongARM processor available
 295           from Digital. It has limited hardware on-board, including an
 296           Ethernet interface, two PCMCIA sockets, two serial ports and a
 297           parallel port.
 298
 299 config ARCH_EP93XX
 300         bool "EP93xx-based"
 301         select CPU_ARM920T
 302         select ARM_AMBA
 303         select ARM_VIC
 304         select GENERIC_GPIO
 305         select HAVE_CLK
 306         select COMMON_CLKDEV
 307         select ARCH_REQUIRE_GPIOLIB
 308         select ARCH_HAS_HOLES_MEMORYMODEL
 309         help
 310           This enables support for the Cirrus EP93xx series of CPUs.
 311
 312 config ARCH_FOOTBRIDGE
 313         bool "FootBridge"
 314         select CPU_SA110
 315         select FOOTBRIDGE
 316         help
 317           Support for systems based on the DC21285 companion chip
 318           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 319
 320 config ARCH_MXC
 321         bool "Freescale MXC/iMX-based"
 322         select GENERIC_TIME
 323         select GENERIC_CLOCKEVENTS
 324         select ARCH_MTD_XIP
 325         select GENERIC_GPIO
 326         select ARCH_REQUIRE_GPIOLIB
 327         select HAVE_CLK
 328         help
 329           Support for Freescale MXC/iMX-based family of processors
 330
 331 config ARCH_STMP3XXX
 332         bool "Freescale STMP3xxx"
 333         select CPU_ARM926T
 334         select HAVE_CLK
 335         select COMMON_CLKDEV
 336         select ARCH_REQUIRE_GPIOLIB
 337         select GENERIC_TIME
 338         select GENERIC_CLOCKEVENTS
 339         select GENERIC_GPIO
 340         select USB_ARCH_HAS_EHCI
 341         help
 342           Support for systems based on the Freescale 3xxx CPUs.
 343
 344 config ARCH_NETX
 345         bool "Hilscher NetX based"
 346         select CPU_ARM926T
 347         select ARM_VIC
 348         select GENERIC_CLOCKEVENTS
 349         select GENERIC_TIME
 350         help
 351           This enables support for systems based on the Hilscher NetX Soc
 352
 353 config ARCH_H720X
 354         bool "Hynix HMS720x-based"
 355         select CPU_ARM720T
 356         select ISA_DMA_API
 357         help
 358           This enables support for systems based on the Hynix HMS720x
 359
 360 config ARCH_NOMADIK
 361         bool "STMicroelectronics Nomadik"
 362         select ARM_AMBA
 363         select ARM_VIC
 364         select CPU_ARM926T
 365         select HAVE_CLK
 366         select COMMON_CLKDEV
 367         select GENERIC_TIME
 368         select GENERIC_CLOCKEVENTS
 369         select GENERIC_GPIO
 370         select ARCH_REQUIRE_GPIOLIB
 371         help
 372           Support for the Nomadik platform by ST-Ericsson
 373
 374 config ARCH_IOP13XX
 375         bool "IOP13xx-based"
 376         depends on MMU
 377         select CPU_XSC3
 378         select PLAT_IOP
 379         select PCI
 380         select ARCH_SUPPORTS_MSI
 381         select VMSPLIT_1G
 382         help
 383           Support for Intel's IOP13XX (XScale) family of processors.
 384
 385 config ARCH_IOP32X
 386         bool "IOP32x-based"
 387         depends on MMU
 388         select CPU_XSCALE
 389         select PLAT_IOP
 390         select PCI
 391         select GENERIC_GPIO
 392         select ARCH_REQUIRE_GPIOLIB
 393         help
 394           Support for Intel's 80219 and IOP32X (XScale) family of
 395           processors.
 396
 397 config ARCH_IOP33X
 398         bool "IOP33x-based"
 399         depends on MMU
 400         select CPU_XSCALE
 401         select PLAT_IOP
 402         select PCI
 403         select GENERIC_GPIO
 404         select ARCH_REQUIRE_GPIOLIB
 405         help
 406           Support for Intel's IOP33X (XScale) family of processors.
 407
 408 config ARCH_IXP23XX
 409         bool "IXP23XX-based"
 410         depends on MMU
 411         select CPU_XSC3
 412         select PCI
 413         help
 414           Support for Intel's IXP23xx (XScale) family of processors.
 415
 416 config ARCH_IXP2000
 417         bool "IXP2400/2800-based"
 418         depends on MMU
 419         select CPU_XSCALE
 420         select PCI
 421         help
 422           Support for Intel's IXP2400/2800 (XScale) family of processors.
 423
 424 config ARCH_IXP4XX
 425         bool "IXP4xx-based"
 426         depends on MMU
 427         select CPU_XSCALE
 428         select GENERIC_GPIO
 429         select GENERIC_TIME
 430         select GENERIC_CLOCKEVENTS
 431         select DMABOUNCE if PCI
 432         help
 433           Support for Intel's IXP4XX (XScale) family of processors.
 434
 435 config ARCH_L7200
 436         bool "LinkUp-L7200"
 437         select CPU_ARM720T
 438         select FIQ
 439         help
 440           Say Y here if you intend to run this kernel on a LinkUp Systems
 441           L7200 Software Development Board which uses an ARM720T processor.
 442           Information on this board can be obtained at:
 443
 444           <http://www.linkupsys.com/>
 445
 446           If you have any questions or comments about the Linux kernel port
 447           to this board, send e-mail to <sjhill@cotw.com>.
 448
 449 config ARCH_DOVE
 450         bool "Marvell Dove"
 451         select PCI
 452         select GENERIC_GPIO
 453         select ARCH_REQUIRE_GPIOLIB
 454         select GENERIC_TIME
 455         select GENERIC_CLOCKEVENTS
 456         select PLAT_ORION
 457         help
 458           Support for the Marvell Dove SoC 88AP510
 459
 460 config ARCH_KIRKWOOD
 461         bool "Marvell Kirkwood"
 462         select CPU_FEROCEON
 463         select PCI
 464         select GENERIC_GPIO
 465         select ARCH_REQUIRE_GPIOLIB
 466         select GENERIC_TIME
 467         select GENERIC_CLOCKEVENTS
 468         select PLAT_ORION
 469         help
 470           Support for the following Marvell Kirkwood series SoCs:
 471           88F6180, 88F6192 and 88F6281.
 472
 473 config ARCH_LOKI
 474         bool "Marvell Loki (88RC8480)"
 475         select CPU_FEROCEON
 476         select GENERIC_TIME
 477         select GENERIC_CLOCKEVENTS
 478         select PLAT_ORION
 479         help
 480           Support for the Marvell Loki (88RC8480) SoC.
 481
 482 config ARCH_MV78XX0
 483         bool "Marvell MV78xx0"
 484         select CPU_FEROCEON
 485         select PCI
 486         select GENERIC_GPIO
 487         select ARCH_REQUIRE_GPIOLIB
 488         select GENERIC_TIME
 489         select GENERIC_CLOCKEVENTS
 490         select PLAT_ORION
 491         help
 492           Support for the following Marvell MV78xx0 series SoCs:
 493           MV781x0, MV782x0.
 494
 495 config ARCH_ORION5X
 496         bool "Marvell Orion"
 497         depends on MMU
 498         select CPU_FEROCEON
 499         select PCI
 500         select GENERIC_GPIO
 501         select ARCH_REQUIRE_GPIOLIB
 502         select GENERIC_TIME
 503         select GENERIC_CLOCKEVENTS
 504         select PLAT_ORION
 505         help
 506           Support for the following Marvell Orion 5x series SoCs:
 507           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 508           Orion-2 (5281), Orion-1-90 (6183).
 509
 510 config ARCH_MMP
 511         bool "Marvell PXA168/910"
 512         depends on MMU
 513         select GENERIC_GPIO
 514         select ARCH_REQUIRE_GPIOLIB
 515         select HAVE_CLK
 516         select COMMON_CLKDEV
 517         select GENERIC_TIME
 518         select GENERIC_CLOCKEVENTS
 519         select TICK_ONESHOT
 520         select PLAT_PXA
 521         help
 522           Support for Marvell's PXA168/910 processor line.
 523
 524 config ARCH_KS8695
 525         bool "Micrel/Kendin KS8695"
 526         select CPU_ARM922T
 527         select GENERIC_GPIO
 528         select ARCH_REQUIRE_GPIOLIB
 529         help
 530           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 531           System-on-Chip devices.
 532
 533 config ARCH_NS9XXX
 534         bool "NetSilicon NS9xxx"
 535         select CPU_ARM926T
 536         select GENERIC_GPIO
 537         select GENERIC_TIME
 538         select GENERIC_CLOCKEVENTS
 539         select HAVE_CLK
 540         help
 541           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 542           System.
 543
 544           <http://www.digi.com/products/microprocessors/index.jsp>
 545
 546 config ARCH_W90X900
 547         bool "Nuvoton W90X900 CPU"
 548         select CPU_ARM926T
 549         select ARCH_REQUIRE_GPIOLIB
 550         select GENERIC_GPIO
 551         select HAVE_CLK
 552         select COMMON_CLKDEV
 553         select GENERIC_TIME
 554         select GENERIC_CLOCKEVENTS
 555         help
 556           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 557           At present, the w90x900 has been renamed nuc900, regarding
 558           the ARM series product line, you can login the following
 559           link address to know more.
 560
 561           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 562                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 563
 564 config ARCH_NUC93X
 565         bool "Nuvoton NUC93X CPU"
 566         select CPU_ARM926T
 567         select HAVE_CLK
 568         select COMMON_CLKDEV
 569         help
 570           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 571           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 572
 573 config ARCH_PNX4008
 574         bool "Philips Nexperia PNX4008 Mobile"
 575         select CPU_ARM926T
 576         select HAVE_CLK
 577         select COMMON_CLKDEV
 578         help
 579           This enables support for Philips PNX4008 mobile platform.
 580
 581 config ARCH_PXA
 582         bool "PXA2xx/PXA3xx-based"
 583         depends on MMU
 584         select ARCH_MTD_XIP
 585         select ARCH_HAS_CPUFREQ
 586         select GENERIC_GPIO
 587         select HAVE_CLK
 588         select COMMON_CLKDEV
 589         select ARCH_REQUIRE_GPIOLIB
 590         select GENERIC_TIME
 591         select GENERIC_CLOCKEVENTS
 592         select TICK_ONESHOT
 593         select PLAT_PXA
 594         help
 595           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 596
 597 config ARCH_MSM
 598         bool "Qualcomm MSM"
 599         select CPU_V6
 600         select GENERIC_TIME
 601         select GENERIC_CLOCKEVENTS
 602         help
 603           Support for Qualcomm MSM7K based systems.  This runs on the ARM11
 604           apps processor of the MSM7K and depends on a shared memory
 605           interface to the ARM9 modem processor which runs the baseband stack
 606           and controls some vital subsystems (clock and power control, etc).
 607
 608 config ARCH_RPC
 609         bool "RiscPC"
 610         select ARCH_ACORN
 611         select FIQ
 612         select TIMER_ACORN
 613         select ARCH_MAY_HAVE_PC_FDC
 614         select HAVE_PATA_PLATFORM
 615         select ISA_DMA_API
 616         select NO_IOPORT
 617         select ARCH_SPARSEMEM_ENABLE
 618         help
 619           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 620           CD-ROM interface, serial and parallel port, and the floppy drive.
 621
 622 config ARCH_SA1100
 623         bool "SA1100-based"
 624         select CPU_SA1100
 625         select ISA
 626         select ARCH_SPARSEMEM_ENABLE
 627         select ARCH_MTD_XIP
 628         select ARCH_HAS_CPUFREQ
 629         select CPU_FREQ
 630         select GENERIC_GPIO
 631         select GENERIC_TIME
 632         select GENERIC_CLOCKEVENTS
 633         select HAVE_CLK
 634         select TICK_ONESHOT
 635         select ARCH_REQUIRE_GPIOLIB
 636         help
 637           Support for StrongARM 11x0 based boards.
 638
 639 config ARCH_S3C2410
 640         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 641         select GENERIC_GPIO
 642         select ARCH_HAS_CPUFREQ
 643         select HAVE_CLK
 644         help
 645           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 646           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 647           the Samsung SMDK2410 development board (and derivatives).
 648
 649 config ARCH_S3C64XX
 650         bool "Samsung S3C64XX"
 651         select GENERIC_GPIO
 652         select HAVE_CLK
 653         select ARCH_HAS_CPUFREQ
 654         help
 655           Samsung S3C64XX series based systems
 656
 657 config ARCH_S5PC1XX
 658         bool "Samsung S5PC1XX"
 659         select GENERIC_GPIO
 660         select HAVE_CLK
 661         select CPU_V7
 662         select ARM_L1_CACHE_SHIFT_6
 663         help
 664           Samsung S5PC1XX series based systems
 665
 666 config ARCH_SHARK
 667         bool "Shark"
 668         select CPU_SA110
 669         select ISA
 670         select ISA_DMA
 671         select ZONE_DMA
 672         select PCI
 673         help
 674           Support for the StrongARM based Digital DNARD machine, also known
 675           as "Shark" (<http://www.shark-linux.de/shark.html>).
 676
 677 config ARCH_LH7A40X
 678         bool "Sharp LH7A40X"
 679         select CPU_ARM922T
 680         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 681         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 682         help
 683           Say Y here for systems based on one of the Sharp LH7A40X
 684           System on a Chip processors.  These CPUs include an ARM922T
 685           core with a wide array of integrated devices for
 686           hand-held and low-power applications.
 687
 688 config ARCH_U300
 689         bool "ST-Ericsson U300 Series"
 690         depends on MMU
 691         select CPU_ARM926T
 692         select HAVE_TCM
 693         select ARM_AMBA
 694         select ARM_VIC
 695         select GENERIC_TIME
 696         select GENERIC_CLOCKEVENTS
 697         select HAVE_CLK
 698         select COMMON_CLKDEV
 699         select GENERIC_GPIO
 700         help
 701           Support for ST-Ericsson U300 series mobile platforms.
 702
 703 config ARCH_DAVINCI
 704         bool "TI DaVinci"
 705         select CPU_ARM926T
 706         select GENERIC_TIME
 707         select GENERIC_CLOCKEVENTS
 708         select GENERIC_GPIO
 709         select ARCH_REQUIRE_GPIOLIB
 710         select HAVE_CLK
 711         select ZONE_DMA
 712         select HAVE_IDE
 713         select COMMON_CLKDEV
 714         select GENERIC_ALLOCATOR
 715         select ARCH_HAS_HOLES_MEMORYMODEL
 716         help
 717           Support for TI's DaVinci platform.
 718
 719 config ARCH_OMAP
 720         bool "TI OMAP"
 721         select GENERIC_GPIO
 722         select HAVE_CLK
 723         select ARCH_REQUIRE_GPIOLIB
 724         select ARCH_HAS_CPUFREQ
 725         select GENERIC_TIME
 726         select GENERIC_CLOCKEVENTS
 727         select ARCH_HAS_HOLES_MEMORYMODEL
 728         help
 729           Support for TI's OMAP platform (OMAP1 and OMAP2).
 730
 731 config ARCH_BCMRING
 732         bool "Broadcom BCMRING"
 733         depends on MMU
 734         select CPU_V6
 735         select ARM_AMBA
 736         select COMMON_CLKDEV
 737         select GENERIC_TIME
 738         select GENERIC_CLOCKEVENTS
 739         select ARCH_WANT_OPTIONAL_GPIOLIB
 740         help
 741           Support for Broadcom's BCMRing platform.
 742
 743 config ARCH_U8500
 744         bool "ST-Ericsson U8500 Series"
 745         select CPU_V7
 746         select ARM_AMBA
 747         select GENERIC_TIME
 748         select GENERIC_CLOCKEVENTS
 749         select COMMON_CLKDEV
 750         help
 751           Support for ST-Ericsson's Ux500 architecture
 752
 753 endchoice
 754
 755 source "arch/arm/mach-aaec2000/Kconfig"
 756
 757 source "arch/arm/mach-at91/Kconfig"
 758
 759 source "arch/arm/mach-bcmring/Kconfig"
 760
 761 source "arch/arm/mach-clps711x/Kconfig"
 762
 763 source "arch/arm/mach-davinci/Kconfig"
 764
 765 source "arch/arm/mach-dove/Kconfig"
 766
 767 source "arch/arm/mach-ep93xx/Kconfig"
 768
 769 source "arch/arm/mach-footbridge/Kconfig"
 770
 771 source "arch/arm/mach-gemini/Kconfig"
 772
 773 source "arch/arm/mach-h720x/Kconfig"
 774
 775 source "arch/arm/mach-integrator/Kconfig"
 776
 777 source "arch/arm/mach-iop32x/Kconfig"
 778
 779 source "arch/arm/mach-iop33x/Kconfig"
 780
 781 source "arch/arm/mach-iop13xx/Kconfig"
 782
 783 source "arch/arm/mach-ixp4xx/Kconfig"
 784
 785 source "arch/arm/mach-ixp2000/Kconfig"
 786
 787 source "arch/arm/mach-ixp23xx/Kconfig"
 788
 789 source "arch/arm/mach-kirkwood/Kconfig"
 790
 791 source "arch/arm/mach-ks8695/Kconfig"
 792
 793 source "arch/arm/mach-lh7a40x/Kconfig"
 794
 795 source "arch/arm/mach-loki/Kconfig"
 796
 797 source "arch/arm/mach-msm/Kconfig"
 798
 799 source "arch/arm/mach-mv78xx0/Kconfig"
 800
 801 source "arch/arm/plat-mxc/Kconfig"
 802
 803 source "arch/arm/mach-netx/Kconfig"
 804
 805 source "arch/arm/mach-nomadik/Kconfig"
 806 source "arch/arm/plat-nomadik/Kconfig"
 807
 808 source "arch/arm/mach-ns9xxx/Kconfig"
 809
 810 source "arch/arm/mach-nuc93x/Kconfig"
 811
 812 source "arch/arm/plat-omap/Kconfig"
 813
 814 source "arch/arm/mach-omap1/Kconfig"
 815
 816 source "arch/arm/mach-omap2/Kconfig"
 817
 818 source "arch/arm/mach-orion5x/Kconfig"
 819
 820 source "arch/arm/mach-pxa/Kconfig"
 821 source "arch/arm/plat-pxa/Kconfig"
 822
 823 source "arch/arm/mach-mmp/Kconfig"
 824
 825 source "arch/arm/mach-realview/Kconfig"
 826
 827 source "arch/arm/mach-sa1100/Kconfig"
 828
 829 source "arch/arm/plat-samsung/Kconfig"
 830 source "arch/arm/plat-s3c24xx/Kconfig"
 831 source "arch/arm/plat-s3c64xx/Kconfig"
 832 source "arch/arm/plat-s3c/Kconfig"
 833 source "arch/arm/plat-s5pc1xx/Kconfig"
 834
 835 if ARCH_S3C2410
 836 source "arch/arm/mach-s3c2400/Kconfig"
 837 source "arch/arm/mach-s3c2410/Kconfig"
 838 source "arch/arm/mach-s3c2412/Kconfig"
 839 source "arch/arm/mach-s3c2440/Kconfig"
 840 source "arch/arm/mach-s3c2442/Kconfig"
 841 source "arch/arm/mach-s3c2443/Kconfig"
 842 endif
 843
 844 if ARCH_S3C64XX
 845 source "arch/arm/mach-s3c6400/Kconfig"
 846 source "arch/arm/mach-s3c6410/Kconfig"
 847 endif
 848
 849 source "arch/arm/plat-stmp3xxx/Kconfig"
 850
 851 if ARCH_S5PC1XX
 852 source "arch/arm/mach-s5pc100/Kconfig"
 853 endif
 854
 855 source "arch/arm/mach-u300/Kconfig"
 856
 857 source "arch/arm/mach-ux500/Kconfig"
 858
 859 source "arch/arm/mach-versatile/Kconfig"
 860
 861 source "arch/arm/mach-w90x900/Kconfig"
 862
 863 # Definitions to make life easier
 864 config ARCH_ACORN
 865         bool
 866
 867 config PLAT_IOP
 868         bool
 869         select GENERIC_CLOCKEVENTS
 870         select GENERIC_TIME
 871
 872 config PLAT_ORION
 873         bool
 874
 875 config PLAT_PXA
 876         bool
 877
 878 source arch/arm/mm/Kconfig
 879
 880 config IWMMXT
 881         bool "Enable iWMMXt support"
 882         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 883         default y if PXA27x || PXA3xx || ARCH_MMP
 884         help
 885           Enable support for iWMMXt context switching at run time if
 886           running on a CPU that supports it.
 887
 888 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 889 config XSCALE_PMU
 890         bool
 891         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 892         default y
 893
 894 config CPU_HAS_PMU
 895         depends on CPU_V6 || CPU_V7 || XSCALE_PMU
 896         default y
 897         bool
 898
 899 if !MMU
 900 source "arch/arm/Kconfig-nommu"
 901 endif
 902
 903 config ARM_ERRATA_411920
 904         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 905         depends on CPU_V6 && !SMP
 906         help
 907           Invalidation of the Instruction Cache operation can
 908           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 909           It does not affect the MPCore. This option enables the ARM Ltd.
 910           recommended workaround.
 911
 912 config ARM_ERRATA_430973
 913         bool "ARM errata: Stale prediction on replaced interworking branch"
 914         depends on CPU_V7
 915         help
 916           This option enables the workaround for the 430973 Cortex-A8
 917           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 918           interworking branch is replaced with another code sequence at the
 919           same virtual address, whether due to self-modifying code or virtual
 920           to physical address re-mapping, Cortex-A8 does not recover from the
 921           stale interworking branch prediction. This results in Cortex-A8
 922           executing the new code sequence in the incorrect ARM or Thumb state.
 923           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 924           and also flushes the branch target cache at every context switch.
 925           Note that setting specific bits in the ACTLR register may not be
 926           available in non-secure mode.
 927
 928 config ARM_ERRATA_458693
 929         bool "ARM errata: Processor deadlock when a false hazard is created"
 930         depends on CPU_V7
 931         help
 932           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
 933           erratum. For very specific sequences of memory operations, it is
 934           possible for a hazard condition intended for a cache line to instead
 935           be incorrectly associated with a different cache line. This false
 936           hazard might then cause a processor deadlock. The workaround enables
 937           the L1 caching of the NEON accesses and disables the PLD instruction
 938           in the ACTLR register. Note that setting specific bits in the ACTLR
 939           register may not be available in non-secure mode.
 940
 941 config ARM_ERRATA_460075
 942         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
 943         depends on CPU_V7
 944         help
 945           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
 946           erratum. Any asynchronous access to the L2 cache may encounter a
 947           situation in which recent store transactions to the L2 cache are lost
 948           and overwritten with stale memory contents from external memory. The
 949           workaround disables the write-allocate mode for the L2 cache via the
 950           ACTLR register. Note that setting specific bits in the ACTLR register
 951           may not be available in non-secure mode.
 952
 953 config PL310_ERRATA_588369
 954         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
 955         depends on CACHE_L2X0 && ARCH_OMAP4
 956         help
 957            The PL310 L2 cache controller implements three types of Clean &
 958            Invalidate maintenance operations: by Physical Address
 959            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
 960            They are architecturally defined to behave as the execution of a
 961            clean operation followed immediately by an invalidate operation,
 962            both performing to the same memory location. This functionality
 963            is not correctly implemented in PL310 as clean lines are not
 964            invalidated as a result of these operations. Note that this errata
 965            uses Texas Instrument's secure monitor api.
 966 endmenu
 967
 968 source "arch/arm/common/Kconfig"
 969
 970 config FORCE_MAX_ZONEORDER
 971         int
 972         depends on SA1111
 973         default "9"
 974
 975 menu "Bus support"
 976
 977 config ARM_AMBA
 978         bool
 979
 980 config ISA
 981         bool
 982         help
 983           Find out whether you have ISA slots on your motherboard.  ISA is the
 984           name of a bus system, i.e. the way the CPU talks to the other stuff
 985           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 986           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 987           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 988
 989 # Select ISA DMA controller support
 990 config ISA_DMA
 991         bool
 992         select ISA_DMA_API
 993
 994 # Select ISA DMA interface
 995 config ISA_DMA_API
 996         bool
 997
 998 config PCI
 999         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1000         help
1001           Find out whether you have a PCI motherboard. PCI is the name of a
1002           bus system, i.e. the way the CPU talks to the other stuff inside
1003           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1004           VESA. If you have PCI, say Y, otherwise N.
1005
1006 config PCI_SYSCALL
1007         def_bool PCI
1008
1009 # Select the host bridge type
1010 config PCI_HOST_VIA82C505
1011         bool
1012         depends on PCI && ARCH_SHARK
1013         default y
1014
1015 config PCI_HOST_ITE8152
1016         bool
1017         depends on PCI && MACH_ARMCORE
1018         default y
1019         select DMABOUNCE
1020
1021 source "drivers/pci/Kconfig"
1022
1023 source "drivers/pcmcia/Kconfig"
1024
1025 endmenu
1026
1027 menu "Kernel Features"
1028
1029 source "kernel/time/Kconfig"
1030
1031 config SMP
1032         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1033         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1034                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1035         depends on GENERIC_CLOCKEVENTS
1036         select USE_GENERIC_SMP_HELPERS
1037         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1038         help
1039           This enables support for systems with more than one CPU. If you have
1040           a system with only one CPU, like most personal computers, say N. If
1041           you have a system with more than one CPU, say Y.
1042
1043           If you say N here, the kernel will run on single and multiprocessor
1044           machines, but will use only one CPU of a multiprocessor machine. If
1045           you say Y here, the kernel will run on many, but not all, single
1046           processor machines. On a single processor machine, the kernel will
1047           run faster if you say N here.
1048
1049           See also <file:Documentation/i386/IO-APIC.txt>,
1050           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1051           <http://www.linuxdoc.org/docs.html#howto>.
1052
1053           If you don't know what to do here, say N.
1054
1055 config HAVE_ARM_SCU
1056         bool
1057         depends on SMP
1058         help
1059           This option enables support for the ARM system coherency unit
1060
1061 config HAVE_ARM_TWD
1062         bool
1063         depends on SMP
1064         help
1065           This options enables support for the ARM timer and watchdog unit
1066
1067 choice
1068         prompt "Memory split"
1069         default VMSPLIT_3G
1070         help
1071           Select the desired split between kernel and user memory.
1072
1073           If you are not absolutely sure what you are doing, leave this
1074           option alone!
1075
1076         config VMSPLIT_3G
1077                 bool "3G/1G user/kernel split"
1078         config VMSPLIT_2G
1079                 bool "2G/2G user/kernel split"
1080         config VMSPLIT_1G
1081                 bool "1G/3G user/kernel split"
1082 endchoice
1083
1084 config PAGE_OFFSET
1085         hex
1086         default 0x40000000 if VMSPLIT_1G
1087         default 0x80000000 if VMSPLIT_2G
1088         default 0xC0000000
1089
1090 config NR_CPUS
1091         int "Maximum number of CPUs (2-32)"
1092         range 2 32
1093         depends on SMP
1094         default "4"
1095
1096 config HOTPLUG_CPU
1097         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1098         depends on SMP && HOTPLUG && EXPERIMENTAL
1099         help
1100           Say Y here to experiment with turning CPUs off and on.  CPUs
1101           can be controlled through /sys/devices/system/cpu.
1102
1103 config LOCAL_TIMERS
1104         bool "Use local timer interrupts"
1105         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1106                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1107         default y
1108         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1109         help
1110           Enable support for local timers on SMP platforms, rather then the
1111           legacy IPI broadcast method.  Local timers allows the system
1112           accounting to be spread across the timer interval, preventing a
1113           "thundering herd" at every timer tick.
1114
1115 source kernel/Kconfig.preempt
1116
1117 config HZ
1118         int
1119         default 128 if ARCH_L7200
1120         default 200 if ARCH_EBSA110 || ARCH_S3C2410
1121         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1122         default AT91_TIMER_HZ if ARCH_AT91
1123         default 100
1124
1125 config THUMB2_KERNEL
1126         bool "Compile the kernel in Thumb-2 mode"
1127         depends on CPU_V7 && EXPERIMENTAL
1128         select AEABI
1129         select ARM_ASM_UNIFIED
1130         help
1131           By enabling this option, the kernel will be compiled in
1132           Thumb-2 mode. A compiler/assembler that understand the unified
1133           ARM-Thumb syntax is needed.
1134
1135           If unsure, say N.
1136
1137 config ARM_ASM_UNIFIED
1138         bool
1139
1140 config AEABI
1141         bool "Use the ARM EABI to compile the kernel"
1142         help
1143           This option allows for the kernel to be compiled using the latest
1144           ARM ABI (aka EABI).  This is only useful if you are using a user
1145           space environment that is also compiled with EABI.
1146
1147           Since there are major incompatibilities between the legacy ABI and
1148           EABI, especially with regard to structure member alignment, this
1149           option also changes the kernel syscall calling convention to
1150           disambiguate both ABIs and allow for backward compatibility support
1151           (selected with CONFIG_OABI_COMPAT).
1152
1153           To use this you need GCC version 4.0.0 or later.
1154
1155 config OABI_COMPAT
1156         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1157         depends on AEABI && EXPERIMENTAL
1158         default y
1159         help
1160           This option preserves the old syscall interface along with the
1161           new (ARM EABI) one. It also provides a compatibility layer to
1162           intercept syscalls that have structure arguments which layout
1163           in memory differs between the legacy ABI and the new ARM EABI
1164           (only for non "thumb" binaries). This option adds a tiny
1165           overhead to all syscalls and produces a slightly larger kernel.
1166           If you know you'll be using only pure EABI user space then you
1167           can say N here. If this option is not selected and you attempt
1168           to execute a legacy ABI binary then the result will be
1169           UNPREDICTABLE (in fact it can be predicted that it won't work
1170           at all). If in doubt say Y.
1171
1172 config ARCH_HAS_HOLES_MEMORYMODEL
1173         bool
1174
1175 # Discontigmem is deprecated
1176 config ARCH_DISCONTIGMEM_ENABLE
1177         bool
1178
1179 config ARCH_SPARSEMEM_ENABLE
1180         bool
1181
1182 config ARCH_SPARSEMEM_DEFAULT
1183         def_bool ARCH_SPARSEMEM_ENABLE
1184
1185 config ARCH_SELECT_MEMORY_MODEL
1186         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1187
1188 config NODES_SHIFT
1189         int
1190         default "4" if ARCH_LH7A40X
1191         default "2"
1192         depends on NEED_MULTIPLE_NODES
1193
1194 config HIGHMEM
1195         bool "High Memory Support (EXPERIMENTAL)"
1196         depends on MMU && EXPERIMENTAL
1197         help
1198           The address space of ARM processors is only 4 Gigabytes large
1199           and it has to accommodate user address space, kernel address
1200           space as well as some memory mapped IO. That means that, if you
1201           have a large amount of physical memory and/or IO, not all of the
1202           memory can be "permanently mapped" by the kernel. The physical
1203           memory that is not permanently mapped is called "high memory".
1204
1205           Depending on the selected kernel/user memory split, minimum
1206           vmalloc space and actual amount of RAM, you may not need this
1207           option which should result in a slightly faster kernel.
1208
1209           If unsure, say n.
1210
1211 config HIGHPTE
1212         bool "Allocate 2nd-level pagetables from highmem"
1213         depends on HIGHMEM
1214         depends on !OUTER_CACHE
1215
1216 config HW_PERF_EVENTS
1217         bool "Enable hardware performance counter support for perf events"
1218         depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
1219         default y
1220         help
1221           Enable hardware performance counter support for perf events. If
1222           disabled, perf events will use software events only.
1223
1224 source "mm/Kconfig"
1225
1226 config LEDS
1227         bool "Timer and CPU usage LEDs"
1228         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1229                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1230                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1231                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1232                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1233                    ARCH_AT91 || ARCH_DAVINCI || \
1234                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1235         help
1236           If you say Y here, the LEDs on your machine will be used
1237           to provide useful information about your current system status.
1238
1239           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1240           be able to select which LEDs are active using the options below. If
1241           you are compiling a kernel for the EBSA-110 or the LART however, the
1242           red LED will simply flash regularly to indicate that the system is
1243           still functional. It is safe to say Y here if you have a CATS
1244           system, but the driver will do nothing.
1245
1246 config LEDS_TIMER
1247         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1248                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1249                             || MACH_OMAP_PERSEUS2
1250         depends on LEDS
1251         depends on !GENERIC_CLOCKEVENTS
1252         default y if ARCH_EBSA110
1253         help
1254           If you say Y here, one of the system LEDs (the green one on the
1255           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1256           will flash regularly to indicate that the system is still
1257           operational. This is mainly useful to kernel hackers who are
1258           debugging unstable kernels.
1259
1260           The LART uses the same LED for both Timer LED and CPU usage LED
1261           functions. You may choose to use both, but the Timer LED function
1262           will overrule the CPU usage LED.
1263
1264 config LEDS_CPU
1265         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1266                         !ARCH_OMAP) \
1267                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1268                         || MACH_OMAP_PERSEUS2
1269         depends on LEDS
1270         help
1271           If you say Y here, the red LED will be used to give a good real
1272           time indication of CPU usage, by lighting whenever the idle task
1273           is not currently executing.
1274
1275           The LART uses the same LED for both Timer LED and CPU usage LED
1276           functions. You may choose to use both, but the Timer LED function
1277           will overrule the CPU usage LED.
1278
1279 config ALIGNMENT_TRAP
1280         bool
1281         depends on CPU_CP15_MMU
1282         default y if !ARCH_EBSA110
1283         select HAVE_PROC_CPU if PROC_FS
1284         help
1285           ARM processors cannot fetch/store information which is not
1286           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1287           address divisible by 4. On 32-bit ARM processors, these non-aligned
1288           fetch/store instructions will be emulated in software if you say
1289           here, which has a severe performance impact. This is necessary for
1290           correct operation of some network protocols. With an IP-only
1291           configuration it is safe to say N, otherwise say Y.
1292
1293 config UACCESS_WITH_MEMCPY
1294         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1295         depends on MMU && EXPERIMENTAL
1296         default y if CPU_FEROCEON
1297         help
1298           Implement faster copy_to_user and clear_user methods for CPU
1299           cores where a 8-word STM instruction give significantly higher
1300           memory write throughput than a sequence of individual 32bit stores.
1301
1302           A possible side effect is a slight increase in scheduling latency
1303           between threads sharing the same address space if they invoke
1304           such copy operations with large buffers.
1305
1306           However, if the CPU data cache is using a write-allocate mode,
1307           this option is unlikely to provide any performance gain.
1308
1309 endmenu
1310
1311 menu "Boot options"
1312
1313 # Compressed boot loader in ROM.  Yes, we really want to ask about
1314 # TEXT and BSS so we preserve their values in the config files.
1315 config ZBOOT_ROM_TEXT
1316         hex "Compressed ROM boot loader base address"
1317         default "0"
1318         help
1319           The physical address at which the ROM-able zImage is to be
1320           placed in the target.  Platforms which normally make use of
1321           ROM-able zImage formats normally set this to a suitable
1322           value in their defconfig file.
1323
1324           If ZBOOT_ROM is not enabled, this has no effect.
1325
1326 config ZBOOT_ROM_BSS
1327         hex "Compressed ROM boot loader BSS address"
1328         default "0"
1329         help
1330           The base address of an area of read/write memory in the target
1331           for the ROM-able zImage which must be available while the
1332           decompressor is running. It must be large enough to hold the
1333           entire decompressed kernel plus an additional 128 KiB.
1334           Platforms which normally make use of ROM-able zImage formats
1335           normally set this to a suitable value in their defconfig file.
1336
1337           If ZBOOT_ROM is not enabled, this has no effect.
1338
1339 config ZBOOT_ROM
1340         bool "Compressed boot loader in ROM/flash"
1341         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1342         help
1343           Say Y here if you intend to execute your compressed kernel image
1344           (zImage) directly from ROM or flash.  If unsure, say N.
1345
1346 config CMDLINE
1347         string "Default kernel command string"
1348         default ""
1349         help
1350           On some architectures (EBSA110 and CATS), there is currently no way
1351           for the boot loader to pass arguments to the kernel. For these
1352           architectures, you should supply some command-line options at build
1353           time by entering them here. As a minimum, you should specify the
1354           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1355
1356 config XIP_KERNEL
1357         bool "Kernel Execute-In-Place from ROM"
1358         depends on !ZBOOT_ROM
1359         help
1360           Execute-In-Place allows the kernel to run from non-volatile storage
1361           directly addressable by the CPU, such as NOR flash. This saves RAM
1362           space since the text section of the kernel is not loaded from flash
1363           to RAM.  Read-write sections, such as the data section and stack,
1364           are still copied to RAM.  The XIP kernel is not compressed since
1365           it has to run directly from flash, so it will take more space to
1366           store it.  The flash address used to link the kernel object files,
1367           and for storing it, is configuration dependent. Therefore, if you
1368           say Y here, you must know the proper physical address where to
1369           store the kernel image depending on your own flash memory usage.
1370
1371           Also note that the make target becomes "make xipImage" rather than
1372           "make zImage" or "make Image".  The final kernel binary to put in
1373           ROM memory will be arch/arm/boot/xipImage.
1374
1375           If unsure, say N.
1376
1377 config XIP_PHYS_ADDR
1378         hex "XIP Kernel Physical Location"
1379         depends on XIP_KERNEL
1380         default "0x00080000"
1381         help
1382           This is the physical address in your flash memory the kernel will
1383           be linked for and stored to.  This address is dependent on your
1384           own flash usage.
1385
1386 config KEXEC
1387         bool "Kexec system call (EXPERIMENTAL)"
1388         depends on EXPERIMENTAL
1389         help
1390           kexec is a system call that implements the ability to shutdown your
1391           current kernel, and to start another kernel.  It is like a reboot
1392           but it is independent of the system firmware.   And like a reboot
1393           you can start any kernel with it, not just Linux.
1394
1395           It is an ongoing process to be certain the hardware in a machine
1396           is properly shutdown, so do not be surprised if this code does not
1397           initially work for you.  It may help to enable device hotplugging
1398           support.
1399
1400 config ATAGS_PROC
1401         bool "Export atags in procfs"
1402         depends on KEXEC
1403         default y
1404         help
1405           Should the atags used to boot the kernel be exported in an "atags"
1406           file in procfs. Useful with kexec.
1407
1408 endmenu
1409
1410 menu "CPU Power Management"
1411
1412 if ARCH_HAS_CPUFREQ
1413
1414 source "drivers/cpufreq/Kconfig"
1415
1416 config CPU_FREQ_SA1100
1417         bool
1418
1419 config CPU_FREQ_SA1110
1420         bool
1421
1422 config CPU_FREQ_INTEGRATOR
1423         tristate "CPUfreq driver for ARM Integrator CPUs"
1424         depends on ARCH_INTEGRATOR && CPU_FREQ
1425         default y
1426         help
1427           This enables the CPUfreq driver for ARM Integrator CPUs.
1428
1429           For details, take a look at <file:Documentation/cpu-freq>.
1430
1431           If in doubt, say Y.
1432
1433 config CPU_FREQ_PXA
1434         bool
1435         depends on CPU_FREQ && ARCH_PXA && PXA25x
1436         default y
1437         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1438
1439 config CPU_FREQ_S3C64XX
1440         bool "CPUfreq support for Samsung S3C64XX CPUs"
1441         depends on CPU_FREQ && CPU_S3C6410
1442
1443 config CPU_FREQ_S3C
1444         bool
1445         help
1446           Internal configuration node for common cpufreq on Samsung SoC
1447
1448 config CPU_FREQ_S3C24XX
1449         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1450         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1451         select CPU_FREQ_S3C
1452         help
1453           This enables the CPUfreq driver for the Samsung S3C24XX family
1454           of CPUs.
1455
1456           For details, take a look at <file:Documentation/cpu-freq>.
1457
1458           If in doubt, say N.
1459
1460 config CPU_FREQ_S3C24XX_PLL
1461         bool "Support CPUfreq changing of PLL frequency"
1462         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1463         help
1464           Compile in support for changing the PLL frequency from the
1465           S3C24XX series CPUfreq driver. The PLL takes time to settle
1466           after a frequency change, so by default it is not enabled.
1467
1468           This also means that the PLL tables for the selected CPU(s) will
1469           be built which may increase the size of the kernel image.
1470
1471 config CPU_FREQ_S3C24XX_DEBUG
1472         bool "Debug CPUfreq Samsung driver core"
1473         depends on CPU_FREQ_S3C24XX
1474         help
1475           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1476
1477 config CPU_FREQ_S3C24XX_IODEBUG
1478         bool "Debug CPUfreq Samsung driver IO timing"
1479         depends on CPU_FREQ_S3C24XX
1480         help
1481           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1482
1483 config CPU_FREQ_S3C24XX_DEBUGFS
1484         bool "Export debugfs for CPUFreq"
1485         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1486         help
1487           Export status information via debugfs.
1488
1489 endif
1490
1491 source "drivers/cpuidle/Kconfig"
1492
1493 endmenu
1494
1495 menu "Floating point emulation"
1496
1497 comment "At least one emulation must be selected"
1498
1499 config FPE_NWFPE
1500         bool "NWFPE math emulation"
1501         depends on !AEABI || OABI_COMPAT
1502         ---help---
1503           Say Y to include the NWFPE floating point emulator in the kernel.
1504           This is necessary to run most binaries. Linux does not currently
1505           support floating point hardware so you need to say Y here even if
1506           your machine has an FPA or floating point co-processor podule.
1507
1508           You may say N here if you are going to load the Acorn FPEmulator
1509           early in the bootup.
1510
1511 config FPE_NWFPE_XP
1512         bool "Support extended precision"
1513         depends on FPE_NWFPE
1514         help
1515           Say Y to include 80-bit support in the kernel floating-point
1516           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1517           Note that gcc does not generate 80-bit operations by default,
1518           so in most cases this option only enlarges the size of the
1519           floating point emulator without any good reason.
1520
1521           You almost surely want to say N here.
1522
1523 config FPE_FASTFPE
1524         bool "FastFPE math emulation (EXPERIMENTAL)"
1525         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1526         ---help---
1527           Say Y here to include the FAST floating point emulator in the kernel.
1528           This is an experimental much faster emulator which now also has full
1529           precision for the mantissa.  It does not support any exceptions.
1530           It is very simple, and approximately 3-6 times faster than NWFPE.
1531
1532           It should be sufficient for most programs.  It may be not suitable
1533           for scientific calculations, but you have to check this for yourself.
1534           If you do not feel you need a faster FP emulation you should better
1535           choose NWFPE.
1536
1537 config VFP
1538         bool "VFP-format floating point maths"
1539         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1540         help
1541           Say Y to include VFP support code in the kernel. This is needed
1542           if your hardware includes a VFP unit.
1543
1544           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1545           release notes and additional status information.
1546
1547           Say N if your target does not have VFP hardware.
1548
1549 config VFPv3
1550         bool
1551         depends on VFP
1552         default y if CPU_V7
1553
1554 config NEON
1555         bool "Advanced SIMD (NEON) Extension support"
1556         depends on VFPv3 && CPU_V7
1557         help
1558           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1559           Extension.
1560
1561 endmenu
1562
1563 menu "Userspace binary formats"
1564
1565 source "fs/Kconfig.binfmt"
1566
1567 config ARTHUR
1568         tristate "RISC OS personality"
1569         depends on !AEABI
1570         help
1571           Say Y here to include the kernel code necessary if you want to run
1572           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1573           experimental; if this sounds frightening, say N and sleep in peace.
1574           You can also say M here to compile this support as a module (which
1575           will be called arthur).
1576
1577 endmenu
1578
1579 menu "Power management options"
1580
1581 source "kernel/power/Kconfig"
1582
1583 config ARCH_SUSPEND_POSSIBLE
1584         def_bool y
1585
1586 endmenu
1587
1588 source "net/Kconfig"
1589
1590 source "drivers/Kconfig"
1591
1592 source "fs/Kconfig"
1593
1594 source "arch/arm/Kconfig.debug"
1595
1596 source "security/Kconfig"
1597
1598 source "crypto/Kconfig"
1599
1600 source "lib/Kconfig"