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 if (HAVE_PERF_EVENTS)
  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_KERNEL_LZMA
  25         select HAVE_PERF_EVENTS
  26         select PERF_USE_VMALLOC
  27         help
  28           The ARM series is a line of low-power-consumption RISC chip designs
  29           licensed by ARM Ltd and targeted at embedded applications and
  30           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  31           manufactured, but legacy ARM-based PC hardware remains popular in
  32           Europe.  There is an ARM Linux project with a web page at
  33           <http://www.arm.linux.org.uk/>.
  34
  35 config HAVE_PWM
  36         bool
  37
  38 config SYS_SUPPORTS_APM_EMULATION
  39         bool
  40
  41 config GENERIC_GPIO
  42         bool
  43
  44 config GENERIC_TIME
  45         bool
  46         default y
  47
  48 config ARCH_USES_GETTIMEOFFSET
  49         bool
  50         default n
  51
  52 config GENERIC_CLOCKEVENTS
  53         bool
  54
  55 config GENERIC_CLOCKEVENTS_BROADCAST
  56         bool
  57         depends on GENERIC_CLOCKEVENTS
  58         default y if SMP && !LOCAL_TIMERS
  59
  60 config HAVE_TCM
  61         bool
  62         select GENERIC_ALLOCATOR
  63
  64 config HAVE_PROC_CPU
  65         bool
  66
  67 config NO_IOPORT
  68         bool
  69
  70 config EISA
  71         bool
  72         ---help---
  73           The Extended Industry Standard Architecture (EISA) bus was
  74           developed as an open alternative to the IBM MicroChannel bus.
  75
  76           The EISA bus provided some of the features of the IBM MicroChannel
  77           bus while maintaining backward compatibility with cards made for
  78           the older ISA bus.  The EISA bus saw limited use between 1988 and
  79           1995 when it was made obsolete by the PCI bus.
  80
  81           Say Y here if you are building a kernel for an EISA-based machine.
  82
  83           Otherwise, say N.
  84
  85 config SBUS
  86         bool
  87
  88 config MCA
  89         bool
  90         help
  91           MicroChannel Architecture is found in some IBM PS/2 machines and
  92           laptops.  It is a bus system similar to PCI or ISA. See
  93           <file:Documentation/mca.txt> (and especially the web page given
  94           there) before attempting to build an MCA bus kernel.
  95
  96 config GENERIC_HARDIRQS
  97         bool
  98         default y
  99
 100 config STACKTRACE_SUPPORT
 101         bool
 102         default y
 103
 104 config HAVE_LATENCYTOP_SUPPORT
 105         bool
 106         depends on !SMP
 107         default y
 108
 109 config LOCKDEP_SUPPORT
 110         bool
 111         default y
 112
 113 config TRACE_IRQFLAGS_SUPPORT
 114         bool
 115         default y
 116
 117 config HARDIRQS_SW_RESEND
 118         bool
 119         default y
 120
 121 config GENERIC_IRQ_PROBE
 122         bool
 123         default y
 124
 125 config GENERIC_LOCKBREAK
 126         bool
 127         default y
 128         depends on SMP && PREEMPT
 129
 130 config RWSEM_GENERIC_SPINLOCK
 131         bool
 132         default y
 133
 134 config RWSEM_XCHGADD_ALGORITHM
 135         bool
 136
 137 config ARCH_HAS_ILOG2_U32
 138         bool
 139
 140 config ARCH_HAS_ILOG2_U64
 141         bool
 142
 143 config ARCH_HAS_CPUFREQ
 144         bool
 145         help
 146           Internal node to signify that the ARCH has CPUFREQ support
 147           and that the relevant menu configurations are displayed for
 148           it.
 149
 150 config GENERIC_HWEIGHT
 151         bool
 152         default y
 153
 154 config GENERIC_CALIBRATE_DELAY
 155         bool
 156         default y
 157
 158 config ARCH_MAY_HAVE_PC_FDC
 159         bool
 160
 161 config ZONE_DMA
 162         bool
 163
 164 config NEED_DMA_MAP_STATE
 165        def_bool y
 166
 167 config GENERIC_ISA_DMA
 168         bool
 169
 170 config FIQ
 171         bool
 172
 173 config ARCH_MTD_XIP
 174         bool
 175
 176 config GENERIC_HARDIRQS_NO__DO_IRQ
 177         def_bool y
 178
 179 config ARM_L1_CACHE_SHIFT_6
 180         bool
 181         help
 182           Setting ARM L1 cache line size to 64 Bytes.
 183
 184 config VECTORS_BASE
 185         hex
 186         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 187         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 188         default 0x00000000
 189         help
 190           The base address of exception vectors.
 191
 192 source "init/Kconfig"
 193
 194 source "kernel/Kconfig.freezer"
 195
 196 menu "System Type"
 197
 198 config MMU
 199         bool "MMU-based Paged Memory Management Support"
 200         default y
 201         help
 202           Select if you want MMU-based virtualised addressing space
 203           support by paged memory management. If unsure, say 'Y'.
 204
 205 #
 206 # The "ARM system type" choice list is ordered alphabetically by option
 207 # text.  Please add new entries in the option alphabetic order.
 208 #
 209 choice
 210         prompt "ARM system type"
 211         default ARCH_VERSATILE
 212
 213 config ARCH_AAEC2000
 214         bool "Agilent AAEC-2000 based"
 215         select CPU_ARM920T
 216         select ARM_AMBA
 217         select HAVE_CLK
 218         select ARCH_USES_GETTIMEOFFSET
 219         help
 220           This enables support for systems based on the Agilent AAEC-2000
 221
 222 config ARCH_INTEGRATOR
 223         bool "ARM Ltd. Integrator family"
 224         select ARM_AMBA
 225         select ARCH_HAS_CPUFREQ
 226         select COMMON_CLKDEV
 227         select ICST
 228         select GENERIC_CLOCKEVENTS
 229         select PLAT_VERSATILE
 230         help
 231           Support for ARM's Integrator platform.
 232
 233 config ARCH_REALVIEW
 234         bool "ARM Ltd. RealView family"
 235         select ARM_AMBA
 236         select COMMON_CLKDEV
 237         select ICST
 238         select GENERIC_CLOCKEVENTS
 239         select ARCH_WANT_OPTIONAL_GPIOLIB
 240         select PLAT_VERSATILE
 241         select ARM_TIMER_SP804
 242         select GPIO_PL061 if GPIOLIB
 243         help
 244           This enables support for ARM Ltd RealView boards.
 245
 246 config ARCH_VERSATILE
 247         bool "ARM Ltd. Versatile family"
 248         select ARM_AMBA
 249         select ARM_VIC
 250         select COMMON_CLKDEV
 251         select ICST
 252         select GENERIC_CLOCKEVENTS
 253         select ARCH_WANT_OPTIONAL_GPIOLIB
 254         select PLAT_VERSATILE
 255         select ARM_TIMER_SP804
 256         help
 257           This enables support for ARM Ltd Versatile board.
 258
 259 config ARCH_VEXPRESS
 260         bool "ARM Ltd. Versatile Express family"
 261         select ARCH_WANT_OPTIONAL_GPIOLIB
 262         select ARM_AMBA
 263         select ARM_TIMER_SP804
 264         select COMMON_CLKDEV
 265         select GENERIC_CLOCKEVENTS
 266         select HAVE_CLK
 267         select ICST
 268         select PLAT_VERSATILE
 269         help
 270           This enables support for the ARM Ltd Versatile Express boards.
 271
 272 config ARCH_AT91
 273         bool "Atmel AT91"
 274         select ARCH_REQUIRE_GPIOLIB
 275         select HAVE_CLK
 276         select ARCH_USES_GETTIMEOFFSET
 277         help
 278           This enables support for systems based on the Atmel AT91RM9200,
 279           AT91SAM9 and AT91CAP9 processors.
 280
 281 config ARCH_BCMRING
 282         bool "Broadcom BCMRING"
 283         depends on MMU
 284         select CPU_V6
 285         select ARM_AMBA
 286         select COMMON_CLKDEV
 287         select GENERIC_CLOCKEVENTS
 288         select ARCH_WANT_OPTIONAL_GPIOLIB
 289         help
 290           Support for Broadcom's BCMRing platform.
 291
 292 config ARCH_CLPS711X
 293         bool "Cirrus Logic CLPS711x/EP721x-based"
 294         select CPU_ARM720T
 295         select ARCH_USES_GETTIMEOFFSET
 296         help
 297           Support for Cirrus Logic 711x/721x based boards.
 298
 299 config ARCH_CNS3XXX
 300         bool "Cavium Networks CNS3XXX family"
 301         select CPU_V6
 302         select GENERIC_CLOCKEVENTS
 303         select ARM_GIC
 304         help
 305           Support for Cavium Networks CNS3XXX platform.
 306
 307 config ARCH_GEMINI
 308         bool "Cortina Systems Gemini"
 309         select CPU_FA526
 310         select ARCH_REQUIRE_GPIOLIB
 311         select ARCH_USES_GETTIMEOFFSET
 312         help
 313           Support for the Cortina Systems Gemini family SoCs
 314
 315 config ARCH_EBSA110
 316         bool "EBSA-110"
 317         select CPU_SA110
 318         select ISA
 319         select NO_IOPORT
 320         select ARCH_USES_GETTIMEOFFSET
 321         help
 322           This is an evaluation board for the StrongARM processor available
 323           from Digital. It has limited hardware on-board, including an
 324           Ethernet interface, two PCMCIA sockets, two serial ports and a
 325           parallel port.
 326
 327 config ARCH_EP93XX
 328         bool "EP93xx-based"
 329         select CPU_ARM920T
 330         select ARM_AMBA
 331         select ARM_VIC
 332         select COMMON_CLKDEV
 333         select ARCH_REQUIRE_GPIOLIB
 334         select ARCH_HAS_HOLES_MEMORYMODEL
 335         select ARCH_USES_GETTIMEOFFSET
 336         help
 337           This enables support for the Cirrus EP93xx series of CPUs.
 338
 339 config ARCH_FOOTBRIDGE
 340         bool "FootBridge"
 341         select CPU_SA110
 342         select FOOTBRIDGE
 343         select ARCH_USES_GETTIMEOFFSET
 344         help
 345           Support for systems based on the DC21285 companion chip
 346           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 347
 348 config ARCH_MXC
 349         bool "Freescale MXC/iMX-based"
 350         select GENERIC_CLOCKEVENTS
 351         select ARCH_REQUIRE_GPIOLIB
 352         select COMMON_CLKDEV
 353         help
 354           Support for Freescale MXC/iMX-based family of processors
 355
 356 config ARCH_STMP3XXX
 357         bool "Freescale STMP3xxx"
 358         select CPU_ARM926T
 359         select COMMON_CLKDEV
 360         select ARCH_REQUIRE_GPIOLIB
 361         select GENERIC_CLOCKEVENTS
 362         select USB_ARCH_HAS_EHCI
 363         help
 364           Support for systems based on the Freescale 3xxx CPUs.
 365
 366 config ARCH_NETX
 367         bool "Hilscher NetX based"
 368         select CPU_ARM926T
 369         select ARM_VIC
 370         select GENERIC_CLOCKEVENTS
 371         help
 372           This enables support for systems based on the Hilscher NetX Soc
 373
 374 config ARCH_H720X
 375         bool "Hynix HMS720x-based"
 376         select CPU_ARM720T
 377         select ISA_DMA_API
 378         select ARCH_USES_GETTIMEOFFSET
 379         help
 380           This enables support for systems based on the Hynix HMS720x
 381
 382 config ARCH_IOP13XX
 383         bool "IOP13xx-based"
 384         depends on MMU
 385         select CPU_XSC3
 386         select PLAT_IOP
 387         select PCI
 388         select ARCH_SUPPORTS_MSI
 389         select VMSPLIT_1G
 390         help
 391           Support for Intel's IOP13XX (XScale) family of processors.
 392
 393 config ARCH_IOP32X
 394         bool "IOP32x-based"
 395         depends on MMU
 396         select CPU_XSCALE
 397         select PLAT_IOP
 398         select PCI
 399         select ARCH_REQUIRE_GPIOLIB
 400         help
 401           Support for Intel's 80219 and IOP32X (XScale) family of
 402           processors.
 403
 404 config ARCH_IOP33X
 405         bool "IOP33x-based"
 406         depends on MMU
 407         select CPU_XSCALE
 408         select PLAT_IOP
 409         select PCI
 410         select ARCH_REQUIRE_GPIOLIB
 411         help
 412           Support for Intel's IOP33X (XScale) family of processors.
 413
 414 config ARCH_IXP23XX
 415         bool "IXP23XX-based"
 416         depends on MMU
 417         select CPU_XSC3
 418         select PCI
 419         select ARCH_USES_GETTIMEOFFSET
 420         help
 421           Support for Intel's IXP23xx (XScale) family of processors.
 422
 423 config ARCH_IXP2000
 424         bool "IXP2400/2800-based"
 425         depends on MMU
 426         select CPU_XSCALE
 427         select PCI
 428         select ARCH_USES_GETTIMEOFFSET
 429         help
 430           Support for Intel's IXP2400/2800 (XScale) family of processors.
 431
 432 config ARCH_IXP4XX
 433         bool "IXP4xx-based"
 434         depends on MMU
 435         select CPU_XSCALE
 436         select GENERIC_GPIO
 437         select GENERIC_CLOCKEVENTS
 438         select DMABOUNCE if PCI
 439         help
 440           Support for Intel's IXP4XX (XScale) family of processors.
 441
 442 config ARCH_L7200
 443         bool "LinkUp-L7200"
 444         select CPU_ARM720T
 445         select FIQ
 446         select ARCH_USES_GETTIMEOFFSET
 447         help
 448           Say Y here if you intend to run this kernel on a LinkUp Systems
 449           L7200 Software Development Board which uses an ARM720T processor.
 450           Information on this board can be obtained at:
 451
 452           <http://www.linkupsys.com/>
 453
 454           If you have any questions or comments about the Linux kernel port
 455           to this board, send e-mail to <sjhill@cotw.com>.
 456
 457 config ARCH_DOVE
 458         bool "Marvell Dove"
 459         select PCI
 460         select ARCH_REQUIRE_GPIOLIB
 461         select GENERIC_CLOCKEVENTS
 462         select PLAT_ORION
 463         help
 464           Support for the Marvell Dove SoC 88AP510
 465
 466 config ARCH_KIRKWOOD
 467         bool "Marvell Kirkwood"
 468         select CPU_FEROCEON
 469         select PCI
 470         select ARCH_REQUIRE_GPIOLIB
 471         select GENERIC_CLOCKEVENTS
 472         select PLAT_ORION
 473         help
 474           Support for the following Marvell Kirkwood series SoCs:
 475           88F6180, 88F6192 and 88F6281.
 476
 477 config ARCH_LOKI
 478         bool "Marvell Loki (88RC8480)"
 479         select CPU_FEROCEON
 480         select GENERIC_CLOCKEVENTS
 481         select PLAT_ORION
 482         help
 483           Support for the Marvell Loki (88RC8480) SoC.
 484
 485 config ARCH_MV78XX0
 486         bool "Marvell MV78xx0"
 487         select CPU_FEROCEON
 488         select PCI
 489         select ARCH_REQUIRE_GPIOLIB
 490         select GENERIC_CLOCKEVENTS
 491         select PLAT_ORION
 492         help
 493           Support for the following Marvell MV78xx0 series SoCs:
 494           MV781x0, MV782x0.
 495
 496 config ARCH_ORION5X
 497         bool "Marvell Orion"
 498         depends on MMU
 499         select CPU_FEROCEON
 500         select PCI
 501         select ARCH_REQUIRE_GPIOLIB
 502         select GENERIC_CLOCKEVENTS
 503         select PLAT_ORION
 504         help
 505           Support for the following Marvell Orion 5x series SoCs:
 506           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 507           Orion-2 (5281), Orion-1-90 (6183).
 508
 509 config ARCH_MMP
 510         bool "Marvell PXA168/910/MMP2"
 511         depends on MMU
 512         select ARCH_REQUIRE_GPIOLIB
 513         select COMMON_CLKDEV
 514         select GENERIC_CLOCKEVENTS
 515         select TICK_ONESHOT
 516         select PLAT_PXA
 517         help
 518           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 519
 520 config ARCH_KS8695
 521         bool "Micrel/Kendin KS8695"
 522         select CPU_ARM922T
 523         select ARCH_REQUIRE_GPIOLIB
 524         select ARCH_USES_GETTIMEOFFSET
 525         help
 526           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 527           System-on-Chip devices.
 528
 529 config ARCH_NS9XXX
 530         bool "NetSilicon NS9xxx"
 531         select CPU_ARM926T
 532         select GENERIC_GPIO
 533         select GENERIC_CLOCKEVENTS
 534         select HAVE_CLK
 535         help
 536           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 537           System.
 538
 539           <http://www.digi.com/products/microprocessors/index.jsp>
 540
 541 config ARCH_W90X900
 542         bool "Nuvoton W90X900 CPU"
 543         select CPU_ARM926T
 544         select ARCH_REQUIRE_GPIOLIB
 545         select COMMON_CLKDEV
 546         select GENERIC_CLOCKEVENTS
 547         help
 548           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 549           At present, the w90x900 has been renamed nuc900, regarding
 550           the ARM series product line, you can login the following
 551           link address to know more.
 552
 553           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 554                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 555
 556 config ARCH_NUC93X
 557         bool "Nuvoton NUC93X CPU"
 558         select CPU_ARM926T
 559         select COMMON_CLKDEV
 560         help
 561           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 562           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 563
 564 config ARCH_PNX4008
 565         bool "Philips Nexperia PNX4008 Mobile"
 566         select CPU_ARM926T
 567         select COMMON_CLKDEV
 568         select ARCH_USES_GETTIMEOFFSET
 569         help
 570           This enables support for Philips PNX4008 mobile platform.
 571
 572 config ARCH_PXA
 573         bool "PXA2xx/PXA3xx-based"
 574         depends on MMU
 575         select ARCH_MTD_XIP
 576         select ARCH_HAS_CPUFREQ
 577         select COMMON_CLKDEV
 578         select ARCH_REQUIRE_GPIOLIB
 579         select GENERIC_CLOCKEVENTS
 580         select TICK_ONESHOT
 581         select PLAT_PXA
 582         help
 583           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 584
 585 config ARCH_MSM
 586         bool "Qualcomm MSM"
 587         select HAVE_CLK
 588         select GENERIC_CLOCKEVENTS
 589         help
 590           Support for Qualcomm MSM/QSD based systems.  This runs on the
 591           apps processor of the MSM/QSD and depends on a shared memory
 592           interface to the modem processor which runs the baseband
 593           stack and controls some vital subsystems
 594           (clock and power control, etc).
 595
 596 config ARCH_SHMOBILE
 597         bool "Renesas SH-Mobile"
 598         help
 599           Support for Renesas's SH-Mobile ARM platforms
 600
 601 config ARCH_RPC
 602         bool "RiscPC"
 603         select ARCH_ACORN
 604         select FIQ
 605         select TIMER_ACORN
 606         select ARCH_MAY_HAVE_PC_FDC
 607         select HAVE_PATA_PLATFORM
 608         select ISA_DMA_API
 609         select NO_IOPORT
 610         select ARCH_SPARSEMEM_ENABLE
 611         select ARCH_USES_GETTIMEOFFSET
 612         help
 613           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 614           CD-ROM interface, serial and parallel port, and the floppy drive.
 615
 616 config ARCH_SA1100
 617         bool "SA1100-based"
 618         select CPU_SA1100
 619         select ISA
 620         select ARCH_SPARSEMEM_ENABLE
 621         select ARCH_MTD_XIP
 622         select ARCH_HAS_CPUFREQ
 623         select CPU_FREQ
 624         select GENERIC_CLOCKEVENTS
 625         select HAVE_CLK
 626         select TICK_ONESHOT
 627         select ARCH_REQUIRE_GPIOLIB
 628         help
 629           Support for StrongARM 11x0 based boards.
 630
 631 config ARCH_S3C2410
 632         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
 633         select GENERIC_GPIO
 634         select ARCH_HAS_CPUFREQ
 635         select HAVE_CLK
 636         select ARCH_USES_GETTIMEOFFSET
 637         help
 638           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 639           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 640           the Samsung SMDK2410 development board (and derivatives).
 641
 642           Note, the S3C2416 and the S3C2450 are so close that they even share
 643           the same SoC ID code. This means that there is no seperate machine
 644           directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
 645
 646 config ARCH_S3C64XX
 647         bool "Samsung S3C64XX"
 648         select PLAT_SAMSUNG
 649         select CPU_V6
 650         select ARM_VIC
 651         select HAVE_CLK
 652         select NO_IOPORT
 653         select ARCH_USES_GETTIMEOFFSET
 654         select ARCH_HAS_CPUFREQ
 655         select ARCH_REQUIRE_GPIOLIB
 656         select SAMSUNG_CLKSRC
 657         select SAMSUNG_IRQ_VIC_TIMER
 658         select SAMSUNG_IRQ_UART
 659         select S3C_GPIO_TRACK
 660         select S3C_GPIO_PULL_UPDOWN
 661         select S3C_GPIO_CFG_S3C24XX
 662         select S3C_GPIO_CFG_S3C64XX
 663         select S3C_DEV_NAND
 664         select USB_ARCH_HAS_OHCI
 665         select SAMSUNG_GPIOLIB_4BIT
 666         help
 667           Samsung S3C64XX series based systems
 668
 669 config ARCH_S5P6440
 670         bool "Samsung S5P6440"
 671         select CPU_V6
 672         select GENERIC_GPIO
 673         select HAVE_CLK
 674         help
 675           Samsung S5P6440 CPU based systems
 676
 677 config ARCH_S5P6442
 678         bool "Samsung S5P6442"
 679         select CPU_V6
 680         select GENERIC_GPIO
 681         select HAVE_CLK
 682         help
 683           Samsung S5P6442 CPU based systems
 684
 685 config ARCH_S5PC1XX
 686         bool "Samsung S5PC1XX"
 687         select GENERIC_GPIO
 688         select HAVE_CLK
 689         select CPU_V7
 690         select ARM_L1_CACHE_SHIFT_6
 691         help
 692           Samsung S5PC1XX series based systems
 693
 694 config ARCH_S5PV210
 695         bool "Samsung S5PV210/S5PC110"
 696         select CPU_V7
 697         select GENERIC_GPIO
 698         select HAVE_CLK
 699         select ARM_L1_CACHE_SHIFT_6
 700         help
 701           Samsung S5PV210/S5PC110 series based systems
 702
 703 config ARCH_SHARK
 704         bool "Shark"
 705         select CPU_SA110
 706         select ISA
 707         select ISA_DMA
 708         select ZONE_DMA
 709         select PCI
 710         select ARCH_USES_GETTIMEOFFSET
 711         help
 712           Support for the StrongARM based Digital DNARD machine, also known
 713           as "Shark" (<http://www.shark-linux.de/shark.html>).
 714
 715 config ARCH_LH7A40X
 716         bool "Sharp LH7A40X"
 717         select CPU_ARM922T
 718         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 719         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 720         select ARCH_USES_GETTIMEOFFSET
 721         help
 722           Say Y here for systems based on one of the Sharp LH7A40X
 723           System on a Chip processors.  These CPUs include an ARM922T
 724           core with a wide array of integrated devices for
 725           hand-held and low-power applications.
 726
 727 config ARCH_U300
 728         bool "ST-Ericsson U300 Series"
 729         depends on MMU
 730         select CPU_ARM926T
 731         select HAVE_TCM
 732         select ARM_AMBA
 733         select ARM_VIC
 734         select GENERIC_CLOCKEVENTS
 735         select COMMON_CLKDEV
 736         select GENERIC_GPIO
 737         help
 738           Support for ST-Ericsson U300 series mobile platforms.
 739
 740 config ARCH_U8500
 741         bool "ST-Ericsson U8500 Series"
 742         select CPU_V7
 743         select ARM_AMBA
 744         select GENERIC_CLOCKEVENTS
 745         select COMMON_CLKDEV
 746         select ARCH_REQUIRE_GPIOLIB
 747         help
 748           Support for ST-Ericsson's Ux500 architecture
 749
 750 config ARCH_NOMADIK
 751         bool "STMicroelectronics Nomadik"
 752         select ARM_AMBA
 753         select ARM_VIC
 754         select CPU_ARM926T
 755         select COMMON_CLKDEV
 756         select GENERIC_CLOCKEVENTS
 757         select ARCH_REQUIRE_GPIOLIB
 758         help
 759           Support for the Nomadik platform by ST-Ericsson
 760
 761 config ARCH_DAVINCI
 762         bool "TI DaVinci"
 763         select CPU_ARM926T
 764         select GENERIC_CLOCKEVENTS
 765         select ARCH_REQUIRE_GPIOLIB
 766         select ZONE_DMA
 767         select HAVE_IDE
 768         select COMMON_CLKDEV
 769         select GENERIC_ALLOCATOR
 770         select ARCH_HAS_HOLES_MEMORYMODEL
 771         help
 772           Support for TI's DaVinci platform.
 773
 774 config ARCH_OMAP
 775         bool "TI OMAP"
 776         select HAVE_CLK
 777         select ARCH_REQUIRE_GPIOLIB
 778         select ARCH_HAS_CPUFREQ
 779         select GENERIC_CLOCKEVENTS
 780         select ARCH_HAS_HOLES_MEMORYMODEL
 781         help
 782           Support for TI's OMAP platform (OMAP1 and OMAP2).
 783
 784 config PLAT_SPEAR
 785         bool "ST SPEAr"
 786         select ARM_AMBA
 787         select ARCH_REQUIRE_GPIOLIB
 788         select COMMON_CLKDEV
 789         select GENERIC_CLOCKEVENTS
 790         select HAVE_CLK
 791         help
 792           Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
 793
 794 endchoice
 795
 796 #
 797 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 798 # Kconfigs may be included either alphabetically (according to the
 799 # plat- suffix) or along side the corresponding mach-* source.
 800 #
 801 source "arch/arm/mach-aaec2000/Kconfig"
 802
 803 source "arch/arm/mach-at91/Kconfig"
 804
 805 source "arch/arm/mach-bcmring/Kconfig"
 806
 807 source "arch/arm/mach-clps711x/Kconfig"
 808
 809 source "arch/arm/mach-cns3xxx/Kconfig"
 810
 811 source "arch/arm/mach-davinci/Kconfig"
 812
 813 source "arch/arm/mach-dove/Kconfig"
 814
 815 source "arch/arm/mach-ep93xx/Kconfig"
 816
 817 source "arch/arm/mach-footbridge/Kconfig"
 818
 819 source "arch/arm/mach-gemini/Kconfig"
 820
 821 source "arch/arm/mach-h720x/Kconfig"
 822
 823 source "arch/arm/mach-integrator/Kconfig"
 824
 825 source "arch/arm/mach-iop32x/Kconfig"
 826
 827 source "arch/arm/mach-iop33x/Kconfig"
 828
 829 source "arch/arm/mach-iop13xx/Kconfig"
 830
 831 source "arch/arm/mach-ixp4xx/Kconfig"
 832
 833 source "arch/arm/mach-ixp2000/Kconfig"
 834
 835 source "arch/arm/mach-ixp23xx/Kconfig"
 836
 837 source "arch/arm/mach-kirkwood/Kconfig"
 838
 839 source "arch/arm/mach-ks8695/Kconfig"
 840
 841 source "arch/arm/mach-lh7a40x/Kconfig"
 842
 843 source "arch/arm/mach-loki/Kconfig"
 844
 845 source "arch/arm/mach-msm/Kconfig"
 846
 847 source "arch/arm/mach-mv78xx0/Kconfig"
 848
 849 source "arch/arm/plat-mxc/Kconfig"
 850
 851 source "arch/arm/mach-netx/Kconfig"
 852
 853 source "arch/arm/mach-nomadik/Kconfig"
 854 source "arch/arm/plat-nomadik/Kconfig"
 855
 856 source "arch/arm/mach-ns9xxx/Kconfig"
 857
 858 source "arch/arm/mach-nuc93x/Kconfig"
 859
 860 source "arch/arm/plat-omap/Kconfig"
 861
 862 source "arch/arm/mach-omap1/Kconfig"
 863
 864 source "arch/arm/mach-omap2/Kconfig"
 865
 866 source "arch/arm/mach-orion5x/Kconfig"
 867
 868 source "arch/arm/mach-pxa/Kconfig"
 869 source "arch/arm/plat-pxa/Kconfig"
 870
 871 source "arch/arm/mach-mmp/Kconfig"
 872
 873 source "arch/arm/mach-realview/Kconfig"
 874
 875 source "arch/arm/mach-sa1100/Kconfig"
 876
 877 source "arch/arm/plat-samsung/Kconfig"
 878 source "arch/arm/plat-s3c24xx/Kconfig"
 879 source "arch/arm/plat-s5p/Kconfig"
 880 source "arch/arm/plat-s5pc1xx/Kconfig"
 881 source "arch/arm/plat-spear/Kconfig"
 882
 883 if ARCH_S3C2410
 884 source "arch/arm/mach-s3c2400/Kconfig"
 885 source "arch/arm/mach-s3c2410/Kconfig"
 886 source "arch/arm/mach-s3c2412/Kconfig"
 887 source "arch/arm/mach-s3c2416/Kconfig"
 888 source "arch/arm/mach-s3c2440/Kconfig"
 889 source "arch/arm/mach-s3c2443/Kconfig"
 890 endif
 891
 892 if ARCH_S3C64XX
 893 source "arch/arm/mach-s3c64xx/Kconfig"
 894 endif
 895
 896 source "arch/arm/mach-s5p6440/Kconfig"
 897
 898 source "arch/arm/mach-s5p6442/Kconfig"
 899
 900 if ARCH_S5PC1XX
 901 source "arch/arm/mach-s5pc100/Kconfig"
 902 endif
 903
 904 source "arch/arm/mach-s5pv210/Kconfig"
 905
 906 source "arch/arm/mach-shmobile/Kconfig"
 907
 908 source "arch/arm/plat-stmp3xxx/Kconfig"
 909
 910 source "arch/arm/mach-u300/Kconfig"
 911
 912 source "arch/arm/mach-ux500/Kconfig"
 913
 914 source "arch/arm/mach-versatile/Kconfig"
 915
 916 source "arch/arm/mach-vexpress/Kconfig"
 917
 918 source "arch/arm/mach-w90x900/Kconfig"
 919
 920 # Definitions to make life easier
 921 config ARCH_ACORN
 922         bool
 923
 924 config PLAT_IOP
 925         bool
 926         select GENERIC_CLOCKEVENTS
 927
 928 config PLAT_ORION
 929         bool
 930
 931 config PLAT_PXA
 932         bool
 933
 934 config PLAT_VERSATILE
 935         bool
 936
 937 config ARM_TIMER_SP804
 938         bool
 939
 940 source arch/arm/mm/Kconfig
 941
 942 config IWMMXT
 943         bool "Enable iWMMXt support"
 944         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 945         default y if PXA27x || PXA3xx || ARCH_MMP
 946         help
 947           Enable support for iWMMXt context switching at run time if
 948           running on a CPU that supports it.
 949
 950 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 951 config XSCALE_PMU
 952         bool
 953         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 954         default y
 955
 956 config CPU_HAS_PMU
 957         depends on CPU_V6 || CPU_V7 || XSCALE_PMU
 958         default y
 959         bool
 960
 961 if !MMU
 962 source "arch/arm/Kconfig-nommu"
 963 endif
 964
 965 config ARM_ERRATA_411920
 966         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 967         depends on CPU_V6 && !SMP
 968         help
 969           Invalidation of the Instruction Cache operation can
 970           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 971           It does not affect the MPCore. This option enables the ARM Ltd.
 972           recommended workaround.
 973
 974 config ARM_ERRATA_430973
 975         bool "ARM errata: Stale prediction on replaced interworking branch"
 976         depends on CPU_V7
 977         help
 978           This option enables the workaround for the 430973 Cortex-A8
 979           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 980           interworking branch is replaced with another code sequence at the
 981           same virtual address, whether due to self-modifying code or virtual
 982           to physical address re-mapping, Cortex-A8 does not recover from the
 983           stale interworking branch prediction. This results in Cortex-A8
 984           executing the new code sequence in the incorrect ARM or Thumb state.
 985           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 986           and also flushes the branch target cache at every context switch.
 987           Note that setting specific bits in the ACTLR register may not be
 988           available in non-secure mode.
 989
 990 config ARM_ERRATA_458693
 991         bool "ARM errata: Processor deadlock when a false hazard is created"
 992         depends on CPU_V7
 993         help
 994           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
 995           erratum. For very specific sequences of memory operations, it is
 996           possible for a hazard condition intended for a cache line to instead
 997           be incorrectly associated with a different cache line. This false
 998           hazard might then cause a processor deadlock. The workaround enables
 999           the L1 caching of the NEON accesses and disables the PLD instruction
1000           in the ACTLR register. Note that setting specific bits in the ACTLR
1001           register may not be available in non-secure mode.
1002
1003 config ARM_ERRATA_460075
1004         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1005         depends on CPU_V7
1006         help
1007           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1008           erratum. Any asynchronous access to the L2 cache may encounter a
1009           situation in which recent store transactions to the L2 cache are lost
1010           and overwritten with stale memory contents from external memory. The
1011           workaround disables the write-allocate mode for the L2 cache via the
1012           ACTLR register. Note that setting specific bits in the ACTLR register
1013           may not be available in non-secure mode.
1014
1015 config PL310_ERRATA_588369
1016         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1017         depends on CACHE_L2X0 && ARCH_OMAP4
1018         help
1019            The PL310 L2 cache controller implements three types of Clean &
1020            Invalidate maintenance operations: by Physical Address
1021            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1022            They are architecturally defined to behave as the execution of a
1023            clean operation followed immediately by an invalidate operation,
1024            both performing to the same memory location. This functionality
1025            is not correctly implemented in PL310 as clean lines are not
1026            invalidated as a result of these operations. Note that this errata
1027            uses Texas Instrument's secure monitor api.
1028 endmenu
1029
1030 source "arch/arm/common/Kconfig"
1031
1032 config FORCE_MAX_ZONEORDER
1033         int
1034         depends on SA1111
1035         default "9"
1036
1037 menu "Bus support"
1038
1039 config ARM_AMBA
1040         bool
1041
1042 config ISA
1043         bool
1044         help
1045           Find out whether you have ISA slots on your motherboard.  ISA is the
1046           name of a bus system, i.e. the way the CPU talks to the other stuff
1047           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1048           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1049           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1050
1051 # Select ISA DMA controller support
1052 config ISA_DMA
1053         bool
1054         select ISA_DMA_API
1055
1056 # Select ISA DMA interface
1057 config ISA_DMA_API
1058         bool
1059
1060 config PCI
1061         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1062         help
1063           Find out whether you have a PCI motherboard. PCI is the name of a
1064           bus system, i.e. the way the CPU talks to the other stuff inside
1065           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1066           VESA. If you have PCI, say Y, otherwise N.
1067
1068 config PCI_DOMAINS
1069         bool
1070         depends on PCI
1071
1072 config PCI_SYSCALL
1073         def_bool PCI
1074
1075 # Select the host bridge type
1076 config PCI_HOST_VIA82C505
1077         bool
1078         depends on PCI && ARCH_SHARK
1079         default y
1080
1081 config PCI_HOST_ITE8152
1082         bool
1083         depends on PCI && MACH_ARMCORE
1084         default y
1085         select DMABOUNCE
1086
1087 source "drivers/pci/Kconfig"
1088
1089 source "drivers/pcmcia/Kconfig"
1090
1091 endmenu
1092
1093 menu "Kernel Features"
1094
1095 source "kernel/time/Kconfig"
1096
1097 config SMP
1098         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1099         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1100                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
1101                  ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1102         depends on GENERIC_CLOCKEVENTS
1103         select USE_GENERIC_SMP_HELPERS
1104         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1105         help
1106           This enables support for systems with more than one CPU. If you have
1107           a system with only one CPU, like most personal computers, say N. If
1108           you have a system with more than one CPU, say Y.
1109
1110           If you say N here, the kernel will run on single and multiprocessor
1111           machines, but will use only one CPU of a multiprocessor machine. If
1112           you say Y here, the kernel will run on many, but not all, single
1113           processor machines. On a single processor machine, the kernel will
1114           run faster if you say N here.
1115
1116           See also <file:Documentation/i386/IO-APIC.txt>,
1117           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1118           <http://www.linuxdoc.org/docs.html#howto>.
1119
1120           If you don't know what to do here, say N.
1121
1122 config HAVE_ARM_SCU
1123         bool
1124         depends on SMP
1125         help
1126           This option enables support for the ARM system coherency unit
1127
1128 config HAVE_ARM_TWD
1129         bool
1130         depends on SMP
1131         help
1132           This options enables support for the ARM timer and watchdog unit
1133
1134 choice
1135         prompt "Memory split"
1136         default VMSPLIT_3G
1137         help
1138           Select the desired split between kernel and user memory.
1139
1140           If you are not absolutely sure what you are doing, leave this
1141           option alone!
1142
1143         config VMSPLIT_3G
1144                 bool "3G/1G user/kernel split"
1145         config VMSPLIT_2G
1146                 bool "2G/2G user/kernel split"
1147         config VMSPLIT_1G
1148                 bool "1G/3G user/kernel split"
1149 endchoice
1150
1151 config PAGE_OFFSET
1152         hex
1153         default 0x40000000 if VMSPLIT_1G
1154         default 0x80000000 if VMSPLIT_2G
1155         default 0xC0000000
1156
1157 config NR_CPUS
1158         int "Maximum number of CPUs (2-32)"
1159         range 2 32
1160         depends on SMP
1161         default "4"
1162
1163 config HOTPLUG_CPU
1164         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1165         depends on SMP && HOTPLUG && EXPERIMENTAL
1166         help
1167           Say Y here to experiment with turning CPUs off and on.  CPUs
1168           can be controlled through /sys/devices/system/cpu.
1169
1170 config LOCAL_TIMERS
1171         bool "Use local timer interrupts"
1172         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1173                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1174         default y
1175         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1176         help
1177           Enable support for local timers on SMP platforms, rather then the
1178           legacy IPI broadcast method.  Local timers allows the system
1179           accounting to be spread across the timer interval, preventing a
1180           "thundering herd" at every timer tick.
1181
1182 source kernel/Kconfig.preempt
1183
1184 config HZ
1185         int
1186         default 128 if ARCH_L7200
1187         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
1188         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1189         default AT91_TIMER_HZ if ARCH_AT91
1190         default 100
1191
1192 config THUMB2_KERNEL
1193         bool "Compile the kernel in Thumb-2 mode"
1194         depends on CPU_V7 && EXPERIMENTAL
1195         select AEABI
1196         select ARM_ASM_UNIFIED
1197         help
1198           By enabling this option, the kernel will be compiled in
1199           Thumb-2 mode. A compiler/assembler that understand the unified
1200           ARM-Thumb syntax is needed.
1201
1202           If unsure, say N.
1203
1204 config ARM_ASM_UNIFIED
1205         bool
1206
1207 config AEABI
1208         bool "Use the ARM EABI to compile the kernel"
1209         help
1210           This option allows for the kernel to be compiled using the latest
1211           ARM ABI (aka EABI).  This is only useful if you are using a user
1212           space environment that is also compiled with EABI.
1213
1214           Since there are major incompatibilities between the legacy ABI and
1215           EABI, especially with regard to structure member alignment, this
1216           option also changes the kernel syscall calling convention to
1217           disambiguate both ABIs and allow for backward compatibility support
1218           (selected with CONFIG_OABI_COMPAT).
1219
1220           To use this you need GCC version 4.0.0 or later.
1221
1222 config OABI_COMPAT
1223         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1224         depends on AEABI && EXPERIMENTAL
1225         default y
1226         help
1227           This option preserves the old syscall interface along with the
1228           new (ARM EABI) one. It also provides a compatibility layer to
1229           intercept syscalls that have structure arguments which layout
1230           in memory differs between the legacy ABI and the new ARM EABI
1231           (only for non "thumb" binaries). This option adds a tiny
1232           overhead to all syscalls and produces a slightly larger kernel.
1233           If you know you'll be using only pure EABI user space then you
1234           can say N here. If this option is not selected and you attempt
1235           to execute a legacy ABI binary then the result will be
1236           UNPREDICTABLE (in fact it can be predicted that it won't work
1237           at all). If in doubt say Y.
1238
1239 config ARCH_HAS_HOLES_MEMORYMODEL
1240         bool
1241
1242 # Discontigmem is deprecated
1243 config ARCH_DISCONTIGMEM_ENABLE
1244         bool
1245
1246 config ARCH_SPARSEMEM_ENABLE
1247         bool
1248
1249 config ARCH_SPARSEMEM_DEFAULT
1250         def_bool ARCH_SPARSEMEM_ENABLE
1251
1252 config ARCH_SELECT_MEMORY_MODEL
1253         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1254
1255 config NODES_SHIFT
1256         int
1257         default "4" if ARCH_LH7A40X
1258         default "2"
1259         depends on NEED_MULTIPLE_NODES
1260
1261 config HIGHMEM
1262         bool "High Memory Support (EXPERIMENTAL)"
1263         depends on MMU && EXPERIMENTAL
1264         help
1265           The address space of ARM processors is only 4 Gigabytes large
1266           and it has to accommodate user address space, kernel address
1267           space as well as some memory mapped IO. That means that, if you
1268           have a large amount of physical memory and/or IO, not all of the
1269           memory can be "permanently mapped" by the kernel. The physical
1270           memory that is not permanently mapped is called "high memory".
1271
1272           Depending on the selected kernel/user memory split, minimum
1273           vmalloc space and actual amount of RAM, you may not need this
1274           option which should result in a slightly faster kernel.
1275
1276           If unsure, say n.
1277
1278 config HIGHPTE
1279         bool "Allocate 2nd-level pagetables from highmem"
1280         depends on HIGHMEM
1281         depends on !OUTER_CACHE
1282
1283 config HW_PERF_EVENTS
1284         bool "Enable hardware performance counter support for perf events"
1285         depends on PERF_EVENTS && CPU_HAS_PMU
1286         default y
1287         help
1288           Enable hardware performance counter support for perf events. If
1289           disabled, perf events will use software events only.
1290
1291 source "mm/Kconfig"
1292
1293 config LEDS
1294         bool "Timer and CPU usage LEDs"
1295         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1296                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1297                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1298                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1299                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1300                    ARCH_AT91 || ARCH_DAVINCI || \
1301                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1302         help
1303           If you say Y here, the LEDs on your machine will be used
1304           to provide useful information about your current system status.
1305
1306           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1307           be able to select which LEDs are active using the options below. If
1308           you are compiling a kernel for the EBSA-110 or the LART however, the
1309           red LED will simply flash regularly to indicate that the system is
1310           still functional. It is safe to say Y here if you have a CATS
1311           system, but the driver will do nothing.
1312
1313 config LEDS_TIMER
1314         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1315                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1316                             || MACH_OMAP_PERSEUS2
1317         depends on LEDS
1318         depends on !GENERIC_CLOCKEVENTS
1319         default y if ARCH_EBSA110
1320         help
1321           If you say Y here, one of the system LEDs (the green one on the
1322           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1323           will flash regularly to indicate that the system is still
1324           operational. This is mainly useful to kernel hackers who are
1325           debugging unstable kernels.
1326
1327           The LART uses the same LED for both Timer LED and CPU usage LED
1328           functions. You may choose to use both, but the Timer LED function
1329           will overrule the CPU usage LED.
1330
1331 config LEDS_CPU
1332         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1333                         !ARCH_OMAP) \
1334                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1335                         || MACH_OMAP_PERSEUS2
1336         depends on LEDS
1337         help
1338           If you say Y here, the red LED will be used to give a good real
1339           time indication of CPU usage, by lighting whenever the idle task
1340           is not currently executing.
1341
1342           The LART uses the same LED for both Timer LED and CPU usage LED
1343           functions. You may choose to use both, but the Timer LED function
1344           will overrule the CPU usage LED.
1345
1346 config ALIGNMENT_TRAP
1347         bool
1348         depends on CPU_CP15_MMU
1349         default y if !ARCH_EBSA110
1350         select HAVE_PROC_CPU if PROC_FS
1351         help
1352           ARM processors cannot fetch/store information which is not
1353           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1354           address divisible by 4. On 32-bit ARM processors, these non-aligned
1355           fetch/store instructions will be emulated in software if you say
1356           here, which has a severe performance impact. This is necessary for
1357           correct operation of some network protocols. With an IP-only
1358           configuration it is safe to say N, otherwise say Y.
1359
1360 config UACCESS_WITH_MEMCPY
1361         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1362         depends on MMU && EXPERIMENTAL
1363         default y if CPU_FEROCEON
1364         help
1365           Implement faster copy_to_user and clear_user methods for CPU
1366           cores where a 8-word STM instruction give significantly higher
1367           memory write throughput than a sequence of individual 32bit stores.
1368
1369           A possible side effect is a slight increase in scheduling latency
1370           between threads sharing the same address space if they invoke
1371           such copy operations with large buffers.
1372
1373           However, if the CPU data cache is using a write-allocate mode,
1374           this option is unlikely to provide any performance gain.
1375
1376 endmenu
1377
1378 menu "Boot options"
1379
1380 # Compressed boot loader in ROM.  Yes, we really want to ask about
1381 # TEXT and BSS so we preserve their values in the config files.
1382 config ZBOOT_ROM_TEXT
1383         hex "Compressed ROM boot loader base address"
1384         default "0"
1385         help
1386           The physical address at which the ROM-able zImage is to be
1387           placed in the target.  Platforms which normally make use of
1388           ROM-able zImage formats normally set this to a suitable
1389           value in their defconfig file.
1390
1391           If ZBOOT_ROM is not enabled, this has no effect.
1392
1393 config ZBOOT_ROM_BSS
1394         hex "Compressed ROM boot loader BSS address"
1395         default "0"
1396         help
1397           The base address of an area of read/write memory in the target
1398           for the ROM-able zImage which must be available while the
1399           decompressor is running. It must be large enough to hold the
1400           entire decompressed kernel plus an additional 128 KiB.
1401           Platforms which normally make use of ROM-able zImage formats
1402           normally set this to a suitable value in their defconfig file.
1403
1404           If ZBOOT_ROM is not enabled, this has no effect.
1405
1406 config ZBOOT_ROM
1407         bool "Compressed boot loader in ROM/flash"
1408         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1409         help
1410           Say Y here if you intend to execute your compressed kernel image
1411           (zImage) directly from ROM or flash.  If unsure, say N.
1412
1413 config CMDLINE
1414         string "Default kernel command string"
1415         default ""
1416         help
1417           On some architectures (EBSA110 and CATS), there is currently no way
1418           for the boot loader to pass arguments to the kernel. For these
1419           architectures, you should supply some command-line options at build
1420           time by entering them here. As a minimum, you should specify the
1421           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1422
1423 config XIP_KERNEL
1424         bool "Kernel Execute-In-Place from ROM"
1425         depends on !ZBOOT_ROM
1426         help
1427           Execute-In-Place allows the kernel to run from non-volatile storage
1428           directly addressable by the CPU, such as NOR flash. This saves RAM
1429           space since the text section of the kernel is not loaded from flash
1430           to RAM.  Read-write sections, such as the data section and stack,
1431           are still copied to RAM.  The XIP kernel is not compressed since
1432           it has to run directly from flash, so it will take more space to
1433           store it.  The flash address used to link the kernel object files,
1434           and for storing it, is configuration dependent. Therefore, if you
1435           say Y here, you must know the proper physical address where to
1436           store the kernel image depending on your own flash memory usage.
1437
1438           Also note that the make target becomes "make xipImage" rather than
1439           "make zImage" or "make Image".  The final kernel binary to put in
1440           ROM memory will be arch/arm/boot/xipImage.
1441
1442           If unsure, say N.
1443
1444 config XIP_PHYS_ADDR
1445         hex "XIP Kernel Physical Location"
1446         depends on XIP_KERNEL
1447         default "0x00080000"
1448         help
1449           This is the physical address in your flash memory the kernel will
1450           be linked for and stored to.  This address is dependent on your
1451           own flash usage.
1452
1453 config KEXEC
1454         bool "Kexec system call (EXPERIMENTAL)"
1455         depends on EXPERIMENTAL
1456         help
1457           kexec is a system call that implements the ability to shutdown your
1458           current kernel, and to start another kernel.  It is like a reboot
1459           but it is independent of the system firmware.   And like a reboot
1460           you can start any kernel with it, not just Linux.
1461
1462           It is an ongoing process to be certain the hardware in a machine
1463           is properly shutdown, so do not be surprised if this code does not
1464           initially work for you.  It may help to enable device hotplugging
1465           support.
1466
1467 config ATAGS_PROC
1468         bool "Export atags in procfs"
1469         depends on KEXEC
1470         default y
1471         help
1472           Should the atags used to boot the kernel be exported in an "atags"
1473           file in procfs. Useful with kexec.
1474
1475 endmenu
1476
1477 menu "CPU Power Management"
1478
1479 if ARCH_HAS_CPUFREQ
1480
1481 source "drivers/cpufreq/Kconfig"
1482
1483 config CPU_FREQ_SA1100
1484         bool
1485
1486 config CPU_FREQ_SA1110
1487         bool
1488
1489 config CPU_FREQ_INTEGRATOR
1490         tristate "CPUfreq driver for ARM Integrator CPUs"
1491         depends on ARCH_INTEGRATOR && CPU_FREQ
1492         default y
1493         help
1494           This enables the CPUfreq driver for ARM Integrator CPUs.
1495
1496           For details, take a look at <file:Documentation/cpu-freq>.
1497
1498           If in doubt, say Y.
1499
1500 config CPU_FREQ_PXA
1501         bool
1502         depends on CPU_FREQ && ARCH_PXA && PXA25x
1503         default y
1504         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1505
1506 config CPU_FREQ_S3C64XX
1507         bool "CPUfreq support for Samsung S3C64XX CPUs"
1508         depends on CPU_FREQ && CPU_S3C6410
1509
1510 config CPU_FREQ_S3C
1511         bool
1512         help
1513           Internal configuration node for common cpufreq on Samsung SoC
1514
1515 config CPU_FREQ_S3C24XX
1516         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1517         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1518         select CPU_FREQ_S3C
1519         help
1520           This enables the CPUfreq driver for the Samsung S3C24XX family
1521           of CPUs.
1522
1523           For details, take a look at <file:Documentation/cpu-freq>.
1524
1525           If in doubt, say N.
1526
1527 config CPU_FREQ_S3C24XX_PLL
1528         bool "Support CPUfreq changing of PLL frequency"
1529         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1530         help
1531           Compile in support for changing the PLL frequency from the
1532           S3C24XX series CPUfreq driver. The PLL takes time to settle
1533           after a frequency change, so by default it is not enabled.
1534
1535           This also means that the PLL tables for the selected CPU(s) will
1536           be built which may increase the size of the kernel image.
1537
1538 config CPU_FREQ_S3C24XX_DEBUG
1539         bool "Debug CPUfreq Samsung driver core"
1540         depends on CPU_FREQ_S3C24XX
1541         help
1542           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1543
1544 config CPU_FREQ_S3C24XX_IODEBUG
1545         bool "Debug CPUfreq Samsung driver IO timing"
1546         depends on CPU_FREQ_S3C24XX
1547         help
1548           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1549
1550 config CPU_FREQ_S3C24XX_DEBUGFS
1551         bool "Export debugfs for CPUFreq"
1552         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1553         help
1554           Export status information via debugfs.
1555
1556 endif
1557
1558 source "drivers/cpuidle/Kconfig"
1559
1560 endmenu
1561
1562 menu "Floating point emulation"
1563
1564 comment "At least one emulation must be selected"
1565
1566 config FPE_NWFPE
1567         bool "NWFPE math emulation"
1568         depends on !AEABI || OABI_COMPAT
1569         ---help---
1570           Say Y to include the NWFPE floating point emulator in the kernel.
1571           This is necessary to run most binaries. Linux does not currently
1572           support floating point hardware so you need to say Y here even if
1573           your machine has an FPA or floating point co-processor podule.
1574
1575           You may say N here if you are going to load the Acorn FPEmulator
1576           early in the bootup.
1577
1578 config FPE_NWFPE_XP
1579         bool "Support extended precision"
1580         depends on FPE_NWFPE
1581         help
1582           Say Y to include 80-bit support in the kernel floating-point
1583           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1584           Note that gcc does not generate 80-bit operations by default,
1585           so in most cases this option only enlarges the size of the
1586           floating point emulator without any good reason.
1587
1588           You almost surely want to say N here.
1589
1590 config FPE_FASTFPE
1591         bool "FastFPE math emulation (EXPERIMENTAL)"
1592         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1593         ---help---
1594           Say Y here to include the FAST floating point emulator in the kernel.
1595           This is an experimental much faster emulator which now also has full
1596           precision for the mantissa.  It does not support any exceptions.
1597           It is very simple, and approximately 3-6 times faster than NWFPE.
1598
1599           It should be sufficient for most programs.  It may be not suitable
1600           for scientific calculations, but you have to check this for yourself.
1601           If you do not feel you need a faster FP emulation you should better
1602           choose NWFPE.
1603
1604 config VFP
1605         bool "VFP-format floating point maths"
1606         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1607         help
1608           Say Y to include VFP support code in the kernel. This is needed
1609           if your hardware includes a VFP unit.
1610
1611           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1612           release notes and additional status information.
1613
1614           Say N if your target does not have VFP hardware.
1615
1616 config VFPv3
1617         bool
1618         depends on VFP
1619         default y if CPU_V7
1620
1621 config NEON
1622         bool "Advanced SIMD (NEON) Extension support"
1623         depends on VFPv3 && CPU_V7
1624         help
1625           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1626           Extension.
1627
1628 endmenu
1629
1630 menu "Userspace binary formats"
1631
1632 source "fs/Kconfig.binfmt"
1633
1634 config ARTHUR
1635         tristate "RISC OS personality"
1636         depends on !AEABI
1637         help
1638           Say Y here to include the kernel code necessary if you want to run
1639           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1640           experimental; if this sounds frightening, say N and sleep in peace.
1641           You can also say M here to compile this support as a module (which
1642           will be called arthur).
1643
1644 endmenu
1645
1646 menu "Power management options"
1647
1648 source "kernel/power/Kconfig"
1649
1650 config ARCH_SUSPEND_POSSIBLE
1651         def_bool y
1652
1653 endmenu
1654
1655 source "net/Kconfig"
1656
1657 source "drivers/Kconfig"
1658
1659 source "fs/Kconfig"
1660
1661 source "arch/arm/Kconfig.debug"
1662
1663 source "security/Kconfig"
1664
1665 source "crypto/Kconfig"
1666
1667 source "lib/Kconfig"