arch/arm/Kconfig

   1 config ARM
   2         bool
   3         default y
   4         select HAVE_AOUT
   5         select HAVE_IDE
   6         select RTC_LIB
   7         select SYS_SUPPORTS_APM_EMULATION
   8         select GENERIC_ATOMIC64 if (!CPU_32v6K)
   9         select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  10         select HAVE_ARCH_KGDB
  11         select HAVE_KPROBES if (!XIP_KERNEL)
  12         select HAVE_KRETPROBES if (HAVE_KPROBES)
  13         select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  14         select HAVE_GENERIC_DMA_COHERENT
  15         select HAVE_KERNEL_GZIP
  16         select HAVE_KERNEL_LZO
  17         select HAVE_KERNEL_LZMA
  18         select HAVE_PERF_EVENTS
  19         select PERF_USE_VMALLOC
  20         help
  21           The ARM series is a line of low-power-consumption RISC chip designs
  22           licensed by ARM Ltd and targeted at embedded applications and
  23           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  24           manufactured, but legacy ARM-based PC hardware remains popular in
  25           Europe.  There is an ARM Linux project with a web page at
  26           <http://www.arm.linux.org.uk/>.
  27
  28 config HAVE_PWM
  29         bool
  30
  31 config SYS_SUPPORTS_APM_EMULATION
  32         bool
  33
  34 config GENERIC_GPIO
  35         bool
  36
  37 config GENERIC_TIME
  38         bool
  39         default y
  40
  41 config ARCH_USES_GETTIMEOFFSET
  42         bool
  43         default n
  44
  45 config GENERIC_CLOCKEVENTS
  46         bool
  47
  48 config GENERIC_CLOCKEVENTS_BROADCAST
  49         bool
  50         depends on GENERIC_CLOCKEVENTS
  51         default y if SMP && !LOCAL_TIMERS
  52
  53 config HAVE_TCM
  54         bool
  55         select GENERIC_ALLOCATOR
  56
  57 config HAVE_PROC_CPU
  58         bool
  59
  60 config NO_IOPORT
  61         bool
  62
  63 config EISA
  64         bool
  65         ---help---
  66           The Extended Industry Standard Architecture (EISA) bus was
  67           developed as an open alternative to the IBM MicroChannel bus.
  68
  69           The EISA bus provided some of the features of the IBM MicroChannel
  70           bus while maintaining backward compatibility with cards made for
  71           the older ISA bus.  The EISA bus saw limited use between 1988 and
  72           1995 when it was made obsolete by the PCI bus.
  73
  74           Say Y here if you are building a kernel for an EISA-based machine.
  75
  76           Otherwise, say N.
  77
  78 config SBUS
  79         bool
  80
  81 config MCA
  82         bool
  83         help
  84           MicroChannel Architecture is found in some IBM PS/2 machines and
  85           laptops.  It is a bus system similar to PCI or ISA. See
  86           <file:Documentation/mca.txt> (and especially the web page given
  87           there) before attempting to build an MCA bus kernel.
  88
  89 config GENERIC_HARDIRQS
  90         bool
  91         default y
  92
  93 config STACKTRACE_SUPPORT
  94         bool
  95         default y
  96
  97 config HAVE_LATENCYTOP_SUPPORT
  98         bool
  99         depends on !SMP
 100         default y
 101
 102 config LOCKDEP_SUPPORT
 103         bool
 104         default y
 105
 106 config TRACE_IRQFLAGS_SUPPORT
 107         bool
 108         default y
 109
 110 config HARDIRQS_SW_RESEND
 111         bool
 112         default y
 113
 114 config GENERIC_IRQ_PROBE
 115         bool
 116         default y
 117
 118 config GENERIC_LOCKBREAK
 119         bool
 120         default y
 121         depends on SMP && PREEMPT
 122
 123 config RWSEM_GENERIC_SPINLOCK
 124         bool
 125         default y
 126
 127 config RWSEM_XCHGADD_ALGORITHM
 128         bool
 129
 130 config ARCH_HAS_ILOG2_U32
 131         bool
 132
 133 config ARCH_HAS_ILOG2_U64
 134         bool
 135
 136 config ARCH_HAS_CPUFREQ
 137         bool
 138         help
 139           Internal node to signify that the ARCH has CPUFREQ support
 140           and that the relevant menu configurations are displayed for
 141           it.
 142
 143 config GENERIC_HWEIGHT
 144         bool
 145         default y
 146
 147 config GENERIC_CALIBRATE_DELAY
 148         bool
 149         default y
 150
 151 config ARCH_MAY_HAVE_PC_FDC
 152         bool
 153
 154 config ZONE_DMA
 155         bool
 156
 157 config NEED_DMA_MAP_STATE
 158        def_bool y
 159
 160 config GENERIC_ISA_DMA
 161         bool
 162
 163 config FIQ
 164         bool
 165
 166 config ARCH_MTD_XIP
 167         bool
 168
 169 config GENERIC_HARDIRQS_NO__DO_IRQ
 170         def_bool y
 171
 172 config ARM_L1_CACHE_SHIFT_6
 173         bool
 174         help
 175           Setting ARM L1 cache line size to 64 Bytes.
 176
 177 config VECTORS_BASE
 178         hex
 179         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 180         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 181         default 0x00000000
 182         help
 183           The base address of exception vectors.
 184
 185 source "init/Kconfig"
 186
 187 source "kernel/Kconfig.freezer"
 188
 189 menu "System Type"
 190
 191 config MMU
 192         bool "MMU-based Paged Memory Management Support"
 193         default y
 194         help
 195           Select if you want MMU-based virtualised addressing space
 196           support by paged memory management. If unsure, say 'Y'.
 197
 198 #
 199 # The "ARM system type" choice list is ordered alphabetically by option
 200 # text.  Please add new entries in the option alphabetic order.
 201 #
 202 choice
 203         prompt "ARM system type"
 204         default ARCH_VERSATILE
 205
 206 config ARCH_AAEC2000
 207         bool "Agilent AAEC-2000 based"
 208         select CPU_ARM920T
 209         select ARM_AMBA
 210         select HAVE_CLK
 211         select ARCH_USES_GETTIMEOFFSET
 212         help
 213           This enables support for systems based on the Agilent AAEC-2000
 214
 215 config ARCH_INTEGRATOR
 216         bool "ARM Ltd. Integrator family"
 217         select ARM_AMBA
 218         select ARCH_HAS_CPUFREQ
 219         select COMMON_CLKDEV
 220         select ICST
 221         select GENERIC_CLOCKEVENTS
 222         select PLAT_VERSATILE
 223         help
 224           Support for ARM's Integrator platform.
 225
 226 config ARCH_REALVIEW
 227         bool "ARM Ltd. RealView family"
 228         select ARM_AMBA
 229         select COMMON_CLKDEV
 230         select ICST
 231         select GENERIC_CLOCKEVENTS
 232         select ARCH_WANT_OPTIONAL_GPIOLIB
 233         select PLAT_VERSATILE
 234         select ARM_TIMER_SP804
 235         select GPIO_PL061 if 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 COMMON_CLKDEV
 244         select ICST
 245         select GENERIC_CLOCKEVENTS
 246         select ARCH_WANT_OPTIONAL_GPIOLIB
 247         select PLAT_VERSATILE
 248         select ARM_TIMER_SP804
 249         help
 250           This enables support for ARM Ltd Versatile board.
 251
 252 config ARCH_VEXPRESS
 253         bool "ARM Ltd. Versatile Express family"
 254         select ARCH_WANT_OPTIONAL_GPIOLIB
 255         select ARM_AMBA
 256         select ARM_TIMER_SP804
 257         select COMMON_CLKDEV
 258         select GENERIC_CLOCKEVENTS
 259         select HAVE_CLK
 260         select ICST
 261         select PLAT_VERSATILE
 262         help
 263           This enables support for the ARM Ltd Versatile Express boards.
 264
 265 config ARCH_AT91
 266         bool "Atmel AT91"
 267         select ARCH_REQUIRE_GPIOLIB
 268         select HAVE_CLK
 269         select ARCH_USES_GETTIMEOFFSET
 270         help
 271           This enables support for systems based on the Atmel AT91RM9200,
 272           AT91SAM9 and AT91CAP9 processors.
 273
 274 config ARCH_BCMRING
 275         bool "Broadcom BCMRING"
 276         depends on MMU
 277         select CPU_V6
 278         select ARM_AMBA
 279         select COMMON_CLKDEV
 280         select GENERIC_CLOCKEVENTS
 281         select ARCH_WANT_OPTIONAL_GPIOLIB
 282         help
 283           Support for Broadcom's BCMRing platform.
 284
 285 config ARCH_CLPS711X
 286         bool "Cirrus Logic CLPS711x/EP721x-based"
 287         select CPU_ARM720T
 288         select ARCH_USES_GETTIMEOFFSET
 289         help
 290           Support for Cirrus Logic 711x/721x based boards.
 291
 292 config ARCH_CNS3XXX
 293         bool "Cavium Networks CNS3XXX family"
 294         select CPU_V6
 295         select GENERIC_CLOCKEVENTS
 296         select ARM_GIC
 297         help
 298           Support for Cavium Networks CNS3XXX platform.
 299
 300 config ARCH_GEMINI
 301         bool "Cortina Systems Gemini"
 302         select CPU_FA526
 303         select ARCH_REQUIRE_GPIOLIB
 304         select ARCH_USES_GETTIMEOFFSET
 305         help
 306           Support for the Cortina Systems Gemini family SoCs
 307
 308 config ARCH_EBSA110
 309         bool "EBSA-110"
 310         select CPU_SA110
 311         select ISA
 312         select NO_IOPORT
 313         select ARCH_USES_GETTIMEOFFSET
 314         help
 315           This is an evaluation board for the StrongARM processor available
 316           from Digital. It has limited hardware on-board, including an
 317           Ethernet interface, two PCMCIA sockets, two serial ports and a
 318           parallel port.
 319
 320 config ARCH_EP93XX
 321         bool "EP93xx-based"
 322         select CPU_ARM920T
 323         select ARM_AMBA
 324         select ARM_VIC
 325         select COMMON_CLKDEV
 326         select ARCH_REQUIRE_GPIOLIB
 327         select ARCH_HAS_HOLES_MEMORYMODEL
 328         select ARCH_USES_GETTIMEOFFSET
 329         help
 330           This enables support for the Cirrus EP93xx series of CPUs.
 331
 332 config ARCH_FOOTBRIDGE
 333         bool "FootBridge"
 334         select CPU_SA110
 335         select FOOTBRIDGE
 336         select ARCH_USES_GETTIMEOFFSET
 337         help
 338           Support for systems based on the DC21285 companion chip
 339           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 340
 341 config ARCH_MXC
 342         bool "Freescale MXC/iMX-based"
 343         select GENERIC_CLOCKEVENTS
 344         select ARCH_REQUIRE_GPIOLIB
 345         select COMMON_CLKDEV
 346         help
 347           Support for Freescale MXC/iMX-based family of processors
 348
 349 config ARCH_STMP3XXX
 350         bool "Freescale STMP3xxx"
 351         select CPU_ARM926T
 352         select COMMON_CLKDEV
 353         select ARCH_REQUIRE_GPIOLIB
 354         select GENERIC_CLOCKEVENTS
 355         select USB_ARCH_HAS_EHCI
 356         help
 357           Support for systems based on the Freescale 3xxx CPUs.
 358
 359 config ARCH_NETX
 360         bool "Hilscher NetX based"
 361         select CPU_ARM926T
 362         select ARM_VIC
 363         select GENERIC_CLOCKEVENTS
 364         help
 365           This enables support for systems based on the Hilscher NetX Soc
 366
 367 config ARCH_H720X
 368         bool "Hynix HMS720x-based"
 369         select CPU_ARM720T
 370         select ISA_DMA_API
 371         select ARCH_USES_GETTIMEOFFSET
 372         help
 373           This enables support for systems based on the Hynix HMS720x
 374
 375 config ARCH_IOP13XX
 376         bool "IOP13xx-based"
 377         depends on MMU
 378         select CPU_XSC3
 379         select PLAT_IOP
 380         select PCI
 381         select ARCH_SUPPORTS_MSI
 382         select VMSPLIT_1G
 383         help
 384           Support for Intel's IOP13XX (XScale) family of processors.
 385
 386 config ARCH_IOP32X
 387         bool "IOP32x-based"
 388         depends on MMU
 389         select CPU_XSCALE
 390         select PLAT_IOP
 391         select PCI
 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 ARCH_REQUIRE_GPIOLIB
 404         help
 405           Support for Intel's IOP33X (XScale) family of processors.
 406
 407 config ARCH_IXP23XX
 408         bool "IXP23XX-based"
 409         depends on MMU
 410         select CPU_XSC3
 411         select PCI
 412         select ARCH_USES_GETTIMEOFFSET
 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         select ARCH_USES_GETTIMEOFFSET
 422         help
 423           Support for Intel's IXP2400/2800 (XScale) family of processors.
 424
 425 config ARCH_IXP4XX
 426         bool "IXP4xx-based"
 427         depends on MMU
 428         select CPU_XSCALE
 429         select GENERIC_GPIO
 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         select ARCH_USES_GETTIMEOFFSET
 440         help
 441           Say Y here if you intend to run this kernel on a LinkUp Systems
 442           L7200 Software Development Board which uses an ARM720T processor.
 443           Information on this board can be obtained at:
 444
 445           <http://www.linkupsys.com/>
 446
 447           If you have any questions or comments about the Linux kernel port
 448           to this board, send e-mail to <sjhill@cotw.com>.
 449
 450 config ARCH_DOVE
 451         bool "Marvell Dove"
 452         select PCI
 453         select ARCH_REQUIRE_GPIOLIB
 454         select GENERIC_CLOCKEVENTS
 455         select PLAT_ORION
 456         help
 457           Support for the Marvell Dove SoC 88AP510
 458
 459 config ARCH_KIRKWOOD
 460         bool "Marvell Kirkwood"
 461         select CPU_FEROCEON
 462         select PCI
 463         select ARCH_REQUIRE_GPIOLIB
 464         select GENERIC_CLOCKEVENTS
 465         select PLAT_ORION
 466         help
 467           Support for the following Marvell Kirkwood series SoCs:
 468           88F6180, 88F6192 and 88F6281.
 469
 470 config ARCH_LOKI
 471         bool "Marvell Loki (88RC8480)"
 472         select CPU_FEROCEON
 473         select GENERIC_CLOCKEVENTS
 474         select PLAT_ORION
 475         help
 476           Support for the Marvell Loki (88RC8480) SoC.
 477
 478 config ARCH_MV78XX0
 479         bool "Marvell MV78xx0"
 480         select CPU_FEROCEON
 481         select PCI
 482         select ARCH_REQUIRE_GPIOLIB
 483         select GENERIC_CLOCKEVENTS
 484         select PLAT_ORION
 485         help
 486           Support for the following Marvell MV78xx0 series SoCs:
 487           MV781x0, MV782x0.
 488
 489 config ARCH_ORION5X
 490         bool "Marvell Orion"
 491         depends on MMU
 492         select CPU_FEROCEON
 493         select PCI
 494         select ARCH_REQUIRE_GPIOLIB
 495         select GENERIC_CLOCKEVENTS
 496         select PLAT_ORION
 497         help
 498           Support for the following Marvell Orion 5x series SoCs:
 499           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 500           Orion-2 (5281), Orion-1-90 (6183).
 501
 502 config ARCH_MMP
 503         bool "Marvell PXA168/910/MMP2"
 504         depends on MMU
 505         select ARCH_REQUIRE_GPIOLIB
 506         select COMMON_CLKDEV
 507         select GENERIC_CLOCKEVENTS
 508         select TICK_ONESHOT
 509         select PLAT_PXA
 510         help
 511           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 512
 513 config ARCH_KS8695
 514         bool "Micrel/Kendin KS8695"
 515         select CPU_ARM922T
 516         select ARCH_REQUIRE_GPIOLIB
 517         select ARCH_USES_GETTIMEOFFSET
 518         help
 519           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 520           System-on-Chip devices.
 521
 522 config ARCH_NS9XXX
 523         bool "NetSilicon NS9xxx"
 524         select CPU_ARM926T
 525         select GENERIC_GPIO
 526         select GENERIC_CLOCKEVENTS
 527         select HAVE_CLK
 528         help
 529           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 530           System.
 531
 532           <http://www.digi.com/products/microprocessors/index.jsp>
 533
 534 config ARCH_W90X900
 535         bool "Nuvoton W90X900 CPU"
 536         select CPU_ARM926T
 537         select ARCH_REQUIRE_GPIOLIB
 538         select COMMON_CLKDEV
 539         select GENERIC_CLOCKEVENTS
 540         help
 541           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 542           At present, the w90x900 has been renamed nuc900, regarding
 543           the ARM series product line, you can login the following
 544           link address to know more.
 545
 546           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 547                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 548
 549 config ARCH_NUC93X
 550         bool "Nuvoton NUC93X CPU"
 551         select CPU_ARM926T
 552         select COMMON_CLKDEV
 553         help
 554           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 555           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 556
 557 config ARCH_PNX4008
 558         bool "Philips Nexperia PNX4008 Mobile"
 559         select CPU_ARM926T
 560         select COMMON_CLKDEV
 561         select ARCH_USES_GETTIMEOFFSET
 562         help
 563           This enables support for Philips PNX4008 mobile platform.
 564
 565 config ARCH_PXA
 566         bool "PXA2xx/PXA3xx-based"
 567         depends on MMU
 568         select ARCH_MTD_XIP
 569         select ARCH_HAS_CPUFREQ
 570         select COMMON_CLKDEV
 571         select ARCH_REQUIRE_GPIOLIB
 572         select GENERIC_CLOCKEVENTS
 573         select TICK_ONESHOT
 574         select PLAT_PXA
 575         help
 576           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 577
 578 config ARCH_MSM
 579         bool "Qualcomm MSM"
 580         select HAVE_CLK
 581         select GENERIC_CLOCKEVENTS
 582         help
 583           Support for Qualcomm MSM/QSD based systems.  This runs on the
 584           apps processor of the MSM/QSD and depends on a shared memory
 585           interface to the modem processor which runs the baseband
 586           stack and controls some vital subsystems
 587           (clock and power control, etc).
 588
 589 config ARCH_SHMOBILE
 590         bool "Renesas SH-Mobile"
 591         help
 592           Support for Renesas's SH-Mobile ARM platforms
 593
 594 config ARCH_RPC
 595         bool "RiscPC"
 596         select ARCH_ACORN
 597         select FIQ
 598         select TIMER_ACORN
 599         select ARCH_MAY_HAVE_PC_FDC
 600         select HAVE_PATA_PLATFORM
 601         select ISA_DMA_API
 602         select NO_IOPORT
 603         select ARCH_SPARSEMEM_ENABLE
 604         select ARCH_USES_GETTIMEOFFSET
 605         help
 606           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 607           CD-ROM interface, serial and parallel port, and the floppy drive.
 608
 609 config ARCH_SA1100
 610         bool "SA1100-based"
 611         select CPU_SA1100
 612         select ISA
 613         select ARCH_SPARSEMEM_ENABLE
 614         select ARCH_MTD_XIP
 615         select ARCH_HAS_CPUFREQ
 616         select CPU_FREQ
 617         select GENERIC_CLOCKEVENTS
 618         select HAVE_CLK
 619         select TICK_ONESHOT
 620         select ARCH_REQUIRE_GPIOLIB
 621         help
 622           Support for StrongARM 11x0 based boards.
 623
 624 config ARCH_S3C2410
 625         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
 626         select GENERIC_GPIO
 627         select ARCH_HAS_CPUFREQ
 628         select HAVE_CLK
 629         select ARCH_USES_GETTIMEOFFSET
 630         help
 631           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 632           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 633           the Samsung SMDK2410 development board (and derivatives).
 634
 635           Note, the S3C2416 and the S3C2450 are so close that they even share
 636           the same SoC ID code. This means that there is no seperate machine
 637           directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
 638
 639 config ARCH_S3C64XX
 640         bool "Samsung S3C64XX"
 641         select PLAT_SAMSUNG
 642         select CPU_V6
 643         select ARM_VIC
 644         select HAVE_CLK
 645         select NO_IOPORT
 646         select ARCH_USES_GETTIMEOFFSET
 647         select ARCH_HAS_CPUFREQ
 648         select ARCH_REQUIRE_GPIOLIB
 649         select SAMSUNG_CLKSRC
 650         select SAMSUNG_IRQ_VIC_TIMER
 651         select SAMSUNG_IRQ_UART
 652         select S3C_GPIO_TRACK
 653         select S3C_GPIO_PULL_UPDOWN
 654         select S3C_GPIO_CFG_S3C24XX
 655         select S3C_GPIO_CFG_S3C64XX
 656         select S3C_DEV_NAND
 657         select USB_ARCH_HAS_OHCI
 658         select SAMSUNG_GPIOLIB_4BIT
 659         help
 660           Samsung S3C64XX series based systems
 661
 662 config ARCH_S5P6440
 663         bool "Samsung S5P6440"
 664         select CPU_V6
 665         select GENERIC_GPIO
 666         select HAVE_CLK
 667         select ARCH_USES_GETTIMEOFFSET
 668         help
 669           Samsung S5P6440 CPU based systems
 670
 671 config ARCH_S5P6442
 672         bool "Samsung S5P6442"
 673         select CPU_V6
 674         select GENERIC_GPIO
 675         select HAVE_CLK
 676         select ARCH_USES_GETTIMEOFFSET
 677         help
 678           Samsung S5P6442 CPU based systems
 679
 680 config ARCH_S5PC100
 681         bool "Samsung S5PC100"
 682         select GENERIC_GPIO
 683         select HAVE_CLK
 684         select CPU_V7
 685         select ARM_L1_CACHE_SHIFT_6
 686         select ARCH_USES_GETTIMEOFFSET
 687         help
 688           Samsung S5PC100 series based systems
 689
 690 config ARCH_S5PV210
 691         bool "Samsung S5PV210/S5PC110"
 692         select CPU_V7
 693         select GENERIC_GPIO
 694         select HAVE_CLK
 695         select ARM_L1_CACHE_SHIFT_6
 696         select ARCH_USES_GETTIMEOFFSET
 697         help
 698           Samsung S5PV210/S5PC110 series based systems
 699
 700 config ARCH_SHARK
 701         bool "Shark"
 702         select CPU_SA110
 703         select ISA
 704         select ISA_DMA
 705         select ZONE_DMA
 706         select PCI
 707         select ARCH_USES_GETTIMEOFFSET
 708         help
 709           Support for the StrongARM based Digital DNARD machine, also known
 710           as "Shark" (<http://www.shark-linux.de/shark.html>).
 711
 712 config ARCH_LH7A40X
 713         bool "Sharp LH7A40X"
 714         select CPU_ARM922T
 715         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 716         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 717         select ARCH_USES_GETTIMEOFFSET
 718         help
 719           Say Y here for systems based on one of the Sharp LH7A40X
 720           System on a Chip processors.  These CPUs include an ARM922T
 721           core with a wide array of integrated devices for
 722           hand-held and low-power applications.
 723
 724 config ARCH_U300
 725         bool "ST-Ericsson U300 Series"
 726         depends on MMU
 727         select CPU_ARM926T
 728         select HAVE_TCM
 729         select ARM_AMBA
 730         select ARM_VIC
 731         select GENERIC_CLOCKEVENTS
 732         select COMMON_CLKDEV
 733         select GENERIC_GPIO
 734         help
 735           Support for ST-Ericsson U300 series mobile platforms.
 736
 737 config ARCH_U8500
 738         bool "ST-Ericsson U8500 Series"
 739         select CPU_V7
 740         select ARM_AMBA
 741         select GENERIC_CLOCKEVENTS
 742         select COMMON_CLKDEV
 743         select ARCH_REQUIRE_GPIOLIB
 744         help
 745           Support for ST-Ericsson's Ux500 architecture
 746
 747 config ARCH_NOMADIK
 748         bool "STMicroelectronics Nomadik"
 749         select ARM_AMBA
 750         select ARM_VIC
 751         select CPU_ARM926T
 752         select COMMON_CLKDEV
 753         select GENERIC_CLOCKEVENTS
 754         select ARCH_REQUIRE_GPIOLIB
 755         help
 756           Support for the Nomadik platform by ST-Ericsson
 757
 758 config ARCH_DAVINCI
 759         bool "TI DaVinci"
 760         select GENERIC_CLOCKEVENTS
 761         select ARCH_REQUIRE_GPIOLIB
 762         select ZONE_DMA
 763         select HAVE_IDE
 764         select COMMON_CLKDEV
 765         select GENERIC_ALLOCATOR
 766         select ARCH_HAS_HOLES_MEMORYMODEL
 767         help
 768           Support for TI's DaVinci platform.
 769
 770 config ARCH_OMAP
 771         bool "TI OMAP"
 772         select HAVE_CLK
 773         select ARCH_REQUIRE_GPIOLIB
 774         select ARCH_HAS_CPUFREQ
 775         select GENERIC_CLOCKEVENTS
 776         select ARCH_HAS_HOLES_MEMORYMODEL
 777         help
 778           Support for TI's OMAP platform (OMAP1 and OMAP2).
 779
 780 config PLAT_SPEAR
 781         bool "ST SPEAr"
 782         select ARM_AMBA
 783         select ARCH_REQUIRE_GPIOLIB
 784         select COMMON_CLKDEV
 785         select GENERIC_CLOCKEVENTS
 786         select HAVE_CLK
 787         help
 788           Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
 789
 790 endchoice
 791
 792 #
 793 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 794 # Kconfigs may be included either alphabetically (according to the
 795 # plat- suffix) or along side the corresponding mach-* source.
 796 #
 797 source "arch/arm/mach-aaec2000/Kconfig"
 798
 799 source "arch/arm/mach-at91/Kconfig"
 800
 801 source "arch/arm/mach-bcmring/Kconfig"
 802
 803 source "arch/arm/mach-clps711x/Kconfig"
 804
 805 source "arch/arm/mach-cns3xxx/Kconfig"
 806
 807 source "arch/arm/mach-davinci/Kconfig"
 808
 809 source "arch/arm/mach-dove/Kconfig"
 810
 811 source "arch/arm/mach-ep93xx/Kconfig"
 812
 813 source "arch/arm/mach-footbridge/Kconfig"
 814
 815 source "arch/arm/mach-gemini/Kconfig"
 816
 817 source "arch/arm/mach-h720x/Kconfig"
 818
 819 source "arch/arm/mach-integrator/Kconfig"
 820
 821 source "arch/arm/mach-iop32x/Kconfig"
 822
 823 source "arch/arm/mach-iop33x/Kconfig"
 824
 825 source "arch/arm/mach-iop13xx/Kconfig"
 826
 827 source "arch/arm/mach-ixp4xx/Kconfig"
 828
 829 source "arch/arm/mach-ixp2000/Kconfig"
 830
 831 source "arch/arm/mach-ixp23xx/Kconfig"
 832
 833 source "arch/arm/mach-kirkwood/Kconfig"
 834
 835 source "arch/arm/mach-ks8695/Kconfig"
 836
 837 source "arch/arm/mach-lh7a40x/Kconfig"
 838
 839 source "arch/arm/mach-loki/Kconfig"
 840
 841 source "arch/arm/mach-msm/Kconfig"
 842
 843 source "arch/arm/mach-mv78xx0/Kconfig"
 844
 845 source "arch/arm/plat-mxc/Kconfig"
 846
 847 source "arch/arm/mach-netx/Kconfig"
 848
 849 source "arch/arm/mach-nomadik/Kconfig"
 850 source "arch/arm/plat-nomadik/Kconfig"
 851
 852 source "arch/arm/mach-ns9xxx/Kconfig"
 853
 854 source "arch/arm/mach-nuc93x/Kconfig"
 855
 856 source "arch/arm/plat-omap/Kconfig"
 857
 858 source "arch/arm/mach-omap1/Kconfig"
 859
 860 source "arch/arm/mach-omap2/Kconfig"
 861
 862 source "arch/arm/mach-orion5x/Kconfig"
 863
 864 source "arch/arm/mach-pxa/Kconfig"
 865 source "arch/arm/plat-pxa/Kconfig"
 866
 867 source "arch/arm/mach-mmp/Kconfig"
 868
 869 source "arch/arm/mach-realview/Kconfig"
 870
 871 source "arch/arm/mach-sa1100/Kconfig"
 872
 873 source "arch/arm/plat-samsung/Kconfig"
 874 source "arch/arm/plat-s3c24xx/Kconfig"
 875 source "arch/arm/plat-s5p/Kconfig"
 876
 877 source "arch/arm/plat-spear/Kconfig"
 878
 879 if ARCH_S3C2410
 880 source "arch/arm/mach-s3c2400/Kconfig"
 881 source "arch/arm/mach-s3c2410/Kconfig"
 882 source "arch/arm/mach-s3c2412/Kconfig"
 883 source "arch/arm/mach-s3c2416/Kconfig"
 884 source "arch/arm/mach-s3c2440/Kconfig"
 885 source "arch/arm/mach-s3c2443/Kconfig"
 886 endif
 887
 888 if ARCH_S3C64XX
 889 source "arch/arm/mach-s3c64xx/Kconfig"
 890 endif
 891
 892 source "arch/arm/mach-s5p6440/Kconfig"
 893
 894 source "arch/arm/mach-s5p6442/Kconfig"
 895
 896 source "arch/arm/mach-s5pc100/Kconfig"
 897
 898 source "arch/arm/mach-s5pv210/Kconfig"
 899
 900 source "arch/arm/mach-shmobile/Kconfig"
 901
 902 source "arch/arm/plat-stmp3xxx/Kconfig"
 903
 904 source "arch/arm/mach-u300/Kconfig"
 905
 906 source "arch/arm/mach-ux500/Kconfig"
 907
 908 source "arch/arm/mach-versatile/Kconfig"
 909
 910 source "arch/arm/mach-vexpress/Kconfig"
 911
 912 source "arch/arm/mach-w90x900/Kconfig"
 913
 914 # Definitions to make life easier
 915 config ARCH_ACORN
 916         bool
 917
 918 config PLAT_IOP
 919         bool
 920         select GENERIC_CLOCKEVENTS
 921
 922 config PLAT_ORION
 923         bool
 924
 925 config PLAT_PXA
 926         bool
 927
 928 config PLAT_VERSATILE
 929         bool
 930
 931 config ARM_TIMER_SP804
 932         bool
 933
 934 source arch/arm/mm/Kconfig
 935
 936 config IWMMXT
 937         bool "Enable iWMMXt support"
 938         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 939         default y if PXA27x || PXA3xx || ARCH_MMP
 940         help
 941           Enable support for iWMMXt context switching at run time if
 942           running on a CPU that supports it.
 943
 944 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 945 config XSCALE_PMU
 946         bool
 947         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 948         default y
 949
 950 config CPU_HAS_PMU
 951         depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
 952                    (!ARCH_OMAP3 || OMAP3_EMU)
 953         default y
 954         bool
 955
 956 if !MMU
 957 source "arch/arm/Kconfig-nommu"
 958 endif
 959
 960 config ARM_ERRATA_411920
 961         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 962         depends on CPU_V6 && !SMP
 963         help
 964           Invalidation of the Instruction Cache operation can
 965           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 966           It does not affect the MPCore. This option enables the ARM Ltd.
 967           recommended workaround.
 968
 969 config ARM_ERRATA_430973
 970         bool "ARM errata: Stale prediction on replaced interworking branch"
 971         depends on CPU_V7
 972         help
 973           This option enables the workaround for the 430973 Cortex-A8
 974           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 975           interworking branch is replaced with another code sequence at the
 976           same virtual address, whether due to self-modifying code or virtual
 977           to physical address re-mapping, Cortex-A8 does not recover from the
 978           stale interworking branch prediction. This results in Cortex-A8
 979           executing the new code sequence in the incorrect ARM or Thumb state.
 980           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 981           and also flushes the branch target cache at every context switch.
 982           Note that setting specific bits in the ACTLR register may not be
 983           available in non-secure mode.
 984
 985 config ARM_ERRATA_458693
 986         bool "ARM errata: Processor deadlock when a false hazard is created"
 987         depends on CPU_V7
 988         help
 989           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
 990           erratum. For very specific sequences of memory operations, it is
 991           possible for a hazard condition intended for a cache line to instead
 992           be incorrectly associated with a different cache line. This false
 993           hazard might then cause a processor deadlock. The workaround enables
 994           the L1 caching of the NEON accesses and disables the PLD instruction
 995           in the ACTLR register. Note that setting specific bits in the ACTLR
 996           register may not be available in non-secure mode.
 997
 998 config ARM_ERRATA_460075
 999         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1000         depends on CPU_V7
1001         help
1002           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1003           erratum. Any asynchronous access to the L2 cache may encounter a
1004           situation in which recent store transactions to the L2 cache are lost
1005           and overwritten with stale memory contents from external memory. The
1006           workaround disables the write-allocate mode for the L2 cache via the
1007           ACTLR register. Note that setting specific bits in the ACTLR register
1008           may not be available in non-secure mode.
1009
1010 config PL310_ERRATA_588369
1011         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1012         depends on CACHE_L2X0 && ARCH_OMAP4
1013         help
1014            The PL310 L2 cache controller implements three types of Clean &
1015            Invalidate maintenance operations: by Physical Address
1016            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1017            They are architecturally defined to behave as the execution of a
1018            clean operation followed immediately by an invalidate operation,
1019            both performing to the same memory location. This functionality
1020            is not correctly implemented in PL310 as clean lines are not
1021            invalidated as a result of these operations. Note that this errata
1022            uses Texas Instrument's secure monitor api.
1023 endmenu
1024
1025 source "arch/arm/common/Kconfig"
1026
1027 config FORCE_MAX_ZONEORDER
1028         int
1029         depends on SA1111
1030         default "9"
1031
1032 menu "Bus support"
1033
1034 config ARM_AMBA
1035         bool
1036
1037 config ISA
1038         bool
1039         help
1040           Find out whether you have ISA slots on your motherboard.  ISA is the
1041           name of a bus system, i.e. the way the CPU talks to the other stuff
1042           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1043           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1044           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1045
1046 # Select ISA DMA controller support
1047 config ISA_DMA
1048         bool
1049         select ISA_DMA_API
1050
1051 # Select ISA DMA interface
1052 config ISA_DMA_API
1053         bool
1054
1055 config PCI
1056         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1057         help
1058           Find out whether you have a PCI motherboard. PCI is the name of a
1059           bus system, i.e. the way the CPU talks to the other stuff inside
1060           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1061           VESA. If you have PCI, say Y, otherwise N.
1062
1063 config PCI_DOMAINS
1064         bool
1065         depends on PCI
1066
1067 config PCI_SYSCALL
1068         def_bool PCI
1069
1070 # Select the host bridge type
1071 config PCI_HOST_VIA82C505
1072         bool
1073         depends on PCI && ARCH_SHARK
1074         default y
1075
1076 config PCI_HOST_ITE8152
1077         bool
1078         depends on PCI && MACH_ARMCORE
1079         default y
1080         select DMABOUNCE
1081
1082 source "drivers/pci/Kconfig"
1083
1084 source "drivers/pcmcia/Kconfig"
1085
1086 endmenu
1087
1088 menu "Kernel Features"
1089
1090 source "kernel/time/Kconfig"
1091
1092 config SMP
1093         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1094         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1095                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
1096                  ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1097         depends on GENERIC_CLOCKEVENTS
1098         select USE_GENERIC_SMP_HELPERS
1099         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1100         help
1101           This enables support for systems with more than one CPU. If you have
1102           a system with only one CPU, like most personal computers, say N. If
1103           you have a system with more than one CPU, say Y.
1104
1105           If you say N here, the kernel will run on single and multiprocessor
1106           machines, but will use only one CPU of a multiprocessor machine. If
1107           you say Y here, the kernel will run on many, but not all, single
1108           processor machines. On a single processor machine, the kernel will
1109           run faster if you say N here.
1110
1111           See also <file:Documentation/i386/IO-APIC.txt>,
1112           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1113           <http://www.linuxdoc.org/docs.html#howto>.
1114
1115           If you don't know what to do here, say N.
1116
1117 config HAVE_ARM_SCU
1118         bool
1119         depends on SMP
1120         help
1121           This option enables support for the ARM system coherency unit
1122
1123 config HAVE_ARM_TWD
1124         bool
1125         depends on SMP
1126         help
1127           This options enables support for the ARM timer and watchdog unit
1128
1129 choice
1130         prompt "Memory split"
1131         default VMSPLIT_3G
1132         help
1133           Select the desired split between kernel and user memory.
1134
1135           If you are not absolutely sure what you are doing, leave this
1136           option alone!
1137
1138         config VMSPLIT_3G
1139                 bool "3G/1G user/kernel split"
1140         config VMSPLIT_2G
1141                 bool "2G/2G user/kernel split"
1142         config VMSPLIT_1G
1143                 bool "1G/3G user/kernel split"
1144 endchoice
1145
1146 config PAGE_OFFSET
1147         hex
1148         default 0x40000000 if VMSPLIT_1G
1149         default 0x80000000 if VMSPLIT_2G
1150         default 0xC0000000
1151
1152 config NR_CPUS
1153         int "Maximum number of CPUs (2-32)"
1154         range 2 32
1155         depends on SMP
1156         default "4"
1157
1158 config HOTPLUG_CPU
1159         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1160         depends on SMP && HOTPLUG && EXPERIMENTAL
1161         help
1162           Say Y here to experiment with turning CPUs off and on.  CPUs
1163           can be controlled through /sys/devices/system/cpu.
1164
1165 config LOCAL_TIMERS
1166         bool "Use local timer interrupts"
1167         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1168                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1169         default y
1170         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1171         help
1172           Enable support for local timers on SMP platforms, rather then the
1173           legacy IPI broadcast method.  Local timers allows the system
1174           accounting to be spread across the timer interval, preventing a
1175           "thundering herd" at every timer tick.
1176
1177 source kernel/Kconfig.preempt
1178
1179 config HZ
1180         int
1181         default 128 if ARCH_L7200
1182         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
1183         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1184         default AT91_TIMER_HZ if ARCH_AT91
1185         default 100
1186
1187 config THUMB2_KERNEL
1188         bool "Compile the kernel in Thumb-2 mode"
1189         depends on CPU_V7 && EXPERIMENTAL
1190         select AEABI
1191         select ARM_ASM_UNIFIED
1192         help
1193           By enabling this option, the kernel will be compiled in
1194           Thumb-2 mode. A compiler/assembler that understand the unified
1195           ARM-Thumb syntax is needed.
1196
1197           If unsure, say N.
1198
1199 config ARM_ASM_UNIFIED
1200         bool
1201
1202 config AEABI
1203         bool "Use the ARM EABI to compile the kernel"
1204         help
1205           This option allows for the kernel to be compiled using the latest
1206           ARM ABI (aka EABI).  This is only useful if you are using a user
1207           space environment that is also compiled with EABI.
1208
1209           Since there are major incompatibilities between the legacy ABI and
1210           EABI, especially with regard to structure member alignment, this
1211           option also changes the kernel syscall calling convention to
1212           disambiguate both ABIs and allow for backward compatibility support
1213           (selected with CONFIG_OABI_COMPAT).
1214
1215           To use this you need GCC version 4.0.0 or later.
1216
1217 config OABI_COMPAT
1218         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1219         depends on AEABI && EXPERIMENTAL
1220         default y
1221         help
1222           This option preserves the old syscall interface along with the
1223           new (ARM EABI) one. It also provides a compatibility layer to
1224           intercept syscalls that have structure arguments which layout
1225           in memory differs between the legacy ABI and the new ARM EABI
1226           (only for non "thumb" binaries). This option adds a tiny
1227           overhead to all syscalls and produces a slightly larger kernel.
1228           If you know you'll be using only pure EABI user space then you
1229           can say N here. If this option is not selected and you attempt
1230           to execute a legacy ABI binary then the result will be
1231           UNPREDICTABLE (in fact it can be predicted that it won't work
1232           at all). If in doubt say Y.
1233
1234 config ARCH_HAS_HOLES_MEMORYMODEL
1235         bool
1236
1237 # Discontigmem is deprecated
1238 config ARCH_DISCONTIGMEM_ENABLE
1239         bool
1240
1241 config ARCH_SPARSEMEM_ENABLE
1242         bool
1243
1244 config ARCH_SPARSEMEM_DEFAULT
1245         def_bool ARCH_SPARSEMEM_ENABLE
1246
1247 config ARCH_SELECT_MEMORY_MODEL
1248         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1249
1250 config NODES_SHIFT
1251         int
1252         default "4" if ARCH_LH7A40X
1253         default "2"
1254         depends on NEED_MULTIPLE_NODES
1255
1256 config HIGHMEM
1257         bool "High Memory Support (EXPERIMENTAL)"
1258         depends on MMU && EXPERIMENTAL
1259         help
1260           The address space of ARM processors is only 4 Gigabytes large
1261           and it has to accommodate user address space, kernel address
1262           space as well as some memory mapped IO. That means that, if you
1263           have a large amount of physical memory and/or IO, not all of the
1264           memory can be "permanently mapped" by the kernel. The physical
1265           memory that is not permanently mapped is called "high memory".
1266
1267           Depending on the selected kernel/user memory split, minimum
1268           vmalloc space and actual amount of RAM, you may not need this
1269           option which should result in a slightly faster kernel.
1270
1271           If unsure, say n.
1272
1273 config HIGHPTE
1274         bool "Allocate 2nd-level pagetables from highmem"
1275         depends on HIGHMEM
1276         depends on !OUTER_CACHE
1277
1278 config HW_PERF_EVENTS
1279         bool "Enable hardware performance counter support for perf events"
1280         depends on PERF_EVENTS && CPU_HAS_PMU
1281         default y
1282         help
1283           Enable hardware performance counter support for perf events. If
1284           disabled, perf events will use software events only.
1285
1286 source "mm/Kconfig"
1287
1288 config LEDS
1289         bool "Timer and CPU usage LEDs"
1290         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1291                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1292                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1293                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1294                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1295                    ARCH_AT91 || ARCH_DAVINCI || \
1296                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1297         help
1298           If you say Y here, the LEDs on your machine will be used
1299           to provide useful information about your current system status.
1300
1301           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1302           be able to select which LEDs are active using the options below. If
1303           you are compiling a kernel for the EBSA-110 or the LART however, the
1304           red LED will simply flash regularly to indicate that the system is
1305           still functional. It is safe to say Y here if you have a CATS
1306           system, but the driver will do nothing.
1307
1308 config LEDS_TIMER
1309         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1310                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1311                             || MACH_OMAP_PERSEUS2
1312         depends on LEDS
1313         depends on !GENERIC_CLOCKEVENTS
1314         default y if ARCH_EBSA110
1315         help
1316           If you say Y here, one of the system LEDs (the green one on the
1317           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1318           will flash regularly to indicate that the system is still
1319           operational. This is mainly useful to kernel hackers who are
1320           debugging unstable kernels.
1321
1322           The LART uses the same LED for both Timer LED and CPU usage LED
1323           functions. You may choose to use both, but the Timer LED function
1324           will overrule the CPU usage LED.
1325
1326 config LEDS_CPU
1327         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1328                         !ARCH_OMAP) \
1329                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1330                         || MACH_OMAP_PERSEUS2
1331         depends on LEDS
1332         help
1333           If you say Y here, the red LED will be used to give a good real
1334           time indication of CPU usage, by lighting whenever the idle task
1335           is not currently executing.
1336
1337           The LART uses the same LED for both Timer LED and CPU usage LED
1338           functions. You may choose to use both, but the Timer LED function
1339           will overrule the CPU usage LED.
1340
1341 config ALIGNMENT_TRAP
1342         bool
1343         depends on CPU_CP15_MMU
1344         default y if !ARCH_EBSA110
1345         select HAVE_PROC_CPU if PROC_FS
1346         help
1347           ARM processors cannot fetch/store information which is not
1348           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1349           address divisible by 4. On 32-bit ARM processors, these non-aligned
1350           fetch/store instructions will be emulated in software if you say
1351           here, which has a severe performance impact. This is necessary for
1352           correct operation of some network protocols. With an IP-only
1353           configuration it is safe to say N, otherwise say Y.
1354
1355 config UACCESS_WITH_MEMCPY
1356         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1357         depends on MMU && EXPERIMENTAL
1358         default y if CPU_FEROCEON
1359         help
1360           Implement faster copy_to_user and clear_user methods for CPU
1361           cores where a 8-word STM instruction give significantly higher
1362           memory write throughput than a sequence of individual 32bit stores.
1363
1364           A possible side effect is a slight increase in scheduling latency
1365           between threads sharing the same address space if they invoke
1366           such copy operations with large buffers.
1367
1368           However, if the CPU data cache is using a write-allocate mode,
1369           this option is unlikely to provide any performance gain.
1370
1371 endmenu
1372
1373 menu "Boot options"
1374
1375 # Compressed boot loader in ROM.  Yes, we really want to ask about
1376 # TEXT and BSS so we preserve their values in the config files.
1377 config ZBOOT_ROM_TEXT
1378         hex "Compressed ROM boot loader base address"
1379         default "0"
1380         help
1381           The physical address at which the ROM-able zImage is to be
1382           placed in the target.  Platforms which normally make use of
1383           ROM-able zImage formats normally set this to a suitable
1384           value in their defconfig file.
1385
1386           If ZBOOT_ROM is not enabled, this has no effect.
1387
1388 config ZBOOT_ROM_BSS
1389         hex "Compressed ROM boot loader BSS address"
1390         default "0"
1391         help
1392           The base address of an area of read/write memory in the target
1393           for the ROM-able zImage which must be available while the
1394           decompressor is running. It must be large enough to hold the
1395           entire decompressed kernel plus an additional 128 KiB.
1396           Platforms which normally make use of ROM-able zImage formats
1397           normally set this to a suitable value in their defconfig file.
1398
1399           If ZBOOT_ROM is not enabled, this has no effect.
1400
1401 config ZBOOT_ROM
1402         bool "Compressed boot loader in ROM/flash"
1403         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1404         help
1405           Say Y here if you intend to execute your compressed kernel image
1406           (zImage) directly from ROM or flash.  If unsure, say N.
1407
1408 config CMDLINE
1409         string "Default kernel command string"
1410         default ""
1411         help
1412           On some architectures (EBSA110 and CATS), there is currently no way
1413           for the boot loader to pass arguments to the kernel. For these
1414           architectures, you should supply some command-line options at build
1415           time by entering them here. As a minimum, you should specify the
1416           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1417
1418 config CMDLINE_FORCE
1419         bool "Always use the default kernel command string"
1420         depends on CMDLINE != ""
1421         help
1422           Always use the default kernel command string, even if the boot
1423           loader passes other arguments to the kernel.
1424           This is useful if you cannot or don't want to change the
1425           command-line options your boot loader passes to the kernel.
1426
1427           If unsure, say N.
1428
1429 config XIP_KERNEL
1430         bool "Kernel Execute-In-Place from ROM"
1431         depends on !ZBOOT_ROM
1432         help
1433           Execute-In-Place allows the kernel to run from non-volatile storage
1434           directly addressable by the CPU, such as NOR flash. This saves RAM
1435           space since the text section of the kernel is not loaded from flash
1436           to RAM.  Read-write sections, such as the data section and stack,
1437           are still copied to RAM.  The XIP kernel is not compressed since
1438           it has to run directly from flash, so it will take more space to
1439           store it.  The flash address used to link the kernel object files,
1440           and for storing it, is configuration dependent. Therefore, if you
1441           say Y here, you must know the proper physical address where to
1442           store the kernel image depending on your own flash memory usage.
1443
1444           Also note that the make target becomes "make xipImage" rather than
1445           "make zImage" or "make Image".  The final kernel binary to put in
1446           ROM memory will be arch/arm/boot/xipImage.
1447
1448           If unsure, say N.
1449
1450 config XIP_PHYS_ADDR
1451         hex "XIP Kernel Physical Location"
1452         depends on XIP_KERNEL
1453         default "0x00080000"
1454         help
1455           This is the physical address in your flash memory the kernel will
1456           be linked for and stored to.  This address is dependent on your
1457           own flash usage.
1458
1459 config KEXEC
1460         bool "Kexec system call (EXPERIMENTAL)"
1461         depends on EXPERIMENTAL
1462         help
1463           kexec is a system call that implements the ability to shutdown your
1464           current kernel, and to start another kernel.  It is like a reboot
1465           but it is independent of the system firmware.   And like a reboot
1466           you can start any kernel with it, not just Linux.
1467
1468           It is an ongoing process to be certain the hardware in a machine
1469           is properly shutdown, so do not be surprised if this code does not
1470           initially work for you.  It may help to enable device hotplugging
1471           support.
1472
1473 config ATAGS_PROC
1474         bool "Export atags in procfs"
1475         depends on KEXEC
1476         default y
1477         help
1478           Should the atags used to boot the kernel be exported in an "atags"
1479           file in procfs. Useful with kexec.
1480
1481 endmenu
1482
1483 menu "CPU Power Management"
1484
1485 if ARCH_HAS_CPUFREQ
1486
1487 source "drivers/cpufreq/Kconfig"
1488
1489 config CPU_FREQ_SA1100
1490         bool
1491
1492 config CPU_FREQ_SA1110
1493         bool
1494
1495 config CPU_FREQ_INTEGRATOR
1496         tristate "CPUfreq driver for ARM Integrator CPUs"
1497         depends on ARCH_INTEGRATOR && CPU_FREQ
1498         default y
1499         help
1500           This enables the CPUfreq driver for ARM Integrator CPUs.
1501
1502           For details, take a look at <file:Documentation/cpu-freq>.
1503
1504           If in doubt, say Y.
1505
1506 config CPU_FREQ_PXA
1507         bool
1508         depends on CPU_FREQ && ARCH_PXA && PXA25x
1509         default y
1510         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1511
1512 config CPU_FREQ_S3C64XX
1513         bool "CPUfreq support for Samsung S3C64XX CPUs"
1514         depends on CPU_FREQ && CPU_S3C6410
1515
1516 config CPU_FREQ_S3C
1517         bool
1518         help
1519           Internal configuration node for common cpufreq on Samsung SoC
1520
1521 config CPU_FREQ_S3C24XX
1522         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1523         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1524         select CPU_FREQ_S3C
1525         help
1526           This enables the CPUfreq driver for the Samsung S3C24XX family
1527           of CPUs.
1528
1529           For details, take a look at <file:Documentation/cpu-freq>.
1530
1531           If in doubt, say N.
1532
1533 config CPU_FREQ_S3C24XX_PLL
1534         bool "Support CPUfreq changing of PLL frequency"
1535         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1536         help
1537           Compile in support for changing the PLL frequency from the
1538           S3C24XX series CPUfreq driver. The PLL takes time to settle
1539           after a frequency change, so by default it is not enabled.
1540
1541           This also means that the PLL tables for the selected CPU(s) will
1542           be built which may increase the size of the kernel image.
1543
1544 config CPU_FREQ_S3C24XX_DEBUG
1545         bool "Debug CPUfreq Samsung driver core"
1546         depends on CPU_FREQ_S3C24XX
1547         help
1548           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1549
1550 config CPU_FREQ_S3C24XX_IODEBUG
1551         bool "Debug CPUfreq Samsung driver IO timing"
1552         depends on CPU_FREQ_S3C24XX
1553         help
1554           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1555
1556 config CPU_FREQ_S3C24XX_DEBUGFS
1557         bool "Export debugfs for CPUFreq"
1558         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1559         help
1560           Export status information via debugfs.
1561
1562 endif
1563
1564 source "drivers/cpuidle/Kconfig"
1565
1566 endmenu
1567
1568 menu "Floating point emulation"
1569
1570 comment "At least one emulation must be selected"
1571
1572 config FPE_NWFPE
1573         bool "NWFPE math emulation"
1574         depends on !AEABI || OABI_COMPAT
1575         ---help---
1576           Say Y to include the NWFPE floating point emulator in the kernel.
1577           This is necessary to run most binaries. Linux does not currently
1578           support floating point hardware so you need to say Y here even if
1579           your machine has an FPA or floating point co-processor podule.
1580
1581           You may say N here if you are going to load the Acorn FPEmulator
1582           early in the bootup.
1583
1584 config FPE_NWFPE_XP
1585         bool "Support extended precision"
1586         depends on FPE_NWFPE
1587         help
1588           Say Y to include 80-bit support in the kernel floating-point
1589           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1590           Note that gcc does not generate 80-bit operations by default,
1591           so in most cases this option only enlarges the size of the
1592           floating point emulator without any good reason.
1593
1594           You almost surely want to say N here.
1595
1596 config FPE_FASTFPE
1597         bool "FastFPE math emulation (EXPERIMENTAL)"
1598         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1599         ---help---
1600           Say Y here to include the FAST floating point emulator in the kernel.
1601           This is an experimental much faster emulator which now also has full
1602           precision for the mantissa.  It does not support any exceptions.
1603           It is very simple, and approximately 3-6 times faster than NWFPE.
1604
1605           It should be sufficient for most programs.  It may be not suitable
1606           for scientific calculations, but you have to check this for yourself.
1607           If you do not feel you need a faster FP emulation you should better
1608           choose NWFPE.
1609
1610 config VFP
1611         bool "VFP-format floating point maths"
1612         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1613         help
1614           Say Y to include VFP support code in the kernel. This is needed
1615           if your hardware includes a VFP unit.
1616
1617           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1618           release notes and additional status information.
1619
1620           Say N if your target does not have VFP hardware.
1621
1622 config VFPv3
1623         bool
1624         depends on VFP
1625         default y if CPU_V7
1626
1627 config NEON
1628         bool "Advanced SIMD (NEON) Extension support"
1629         depends on VFPv3 && CPU_V7
1630         help
1631           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1632           Extension.
1633
1634 endmenu
1635
1636 menu "Userspace binary formats"
1637
1638 source "fs/Kconfig.binfmt"
1639
1640 config ARTHUR
1641         tristate "RISC OS personality"
1642         depends on !AEABI
1643         help
1644           Say Y here to include the kernel code necessary if you want to run
1645           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1646           experimental; if this sounds frightening, say N and sleep in peace.
1647           You can also say M here to compile this support as a module (which
1648           will be called arthur).
1649
1650 endmenu
1651
1652 menu "Power management options"
1653
1654 source "kernel/power/Kconfig"
1655
1656 config ARCH_SUSPEND_POSSIBLE
1657         def_bool y
1658
1659 endmenu
1660
1661 source "net/Kconfig"
1662
1663 source "drivers/Kconfig"
1664
1665 source "fs/Kconfig"
1666
1667 source "arch/arm/Kconfig.debug"
1668
1669 source "security/Kconfig"
1670
1671 source "crypto/Kconfig"
1672
1673 source "lib/Kconfig"