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 GENERIC_CLOCKEVENTS
 764         select ARCH_REQUIRE_GPIOLIB
 765         select ZONE_DMA
 766         select HAVE_IDE
 767         select COMMON_CLKDEV
 768         select GENERIC_ALLOCATOR
 769         select ARCH_HAS_HOLES_MEMORYMODEL
 770         help
 771           Support for TI's DaVinci platform.
 772
 773 config ARCH_OMAP
 774         bool "TI OMAP"
 775         select HAVE_CLK
 776         select ARCH_REQUIRE_GPIOLIB
 777         select ARCH_HAS_CPUFREQ
 778         select GENERIC_CLOCKEVENTS
 779         select ARCH_HAS_HOLES_MEMORYMODEL
 780         help
 781           Support for TI's OMAP platform (OMAP1 and OMAP2).
 782
 783 config PLAT_SPEAR
 784         bool "ST SPEAr"
 785         select ARM_AMBA
 786         select ARCH_REQUIRE_GPIOLIB
 787         select COMMON_CLKDEV
 788         select GENERIC_CLOCKEVENTS
 789         select HAVE_CLK
 790         help
 791           Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
 792
 793 endchoice
 794
 795 #
 796 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 797 # Kconfigs may be included either alphabetically (according to the
 798 # plat- suffix) or along side the corresponding mach-* source.
 799 #
 800 source "arch/arm/mach-aaec2000/Kconfig"
 801
 802 source "arch/arm/mach-at91/Kconfig"
 803
 804 source "arch/arm/mach-bcmring/Kconfig"
 805
 806 source "arch/arm/mach-clps711x/Kconfig"
 807
 808 source "arch/arm/mach-cns3xxx/Kconfig"
 809
 810 source "arch/arm/mach-davinci/Kconfig"
 811
 812 source "arch/arm/mach-dove/Kconfig"
 813
 814 source "arch/arm/mach-ep93xx/Kconfig"
 815
 816 source "arch/arm/mach-footbridge/Kconfig"
 817
 818 source "arch/arm/mach-gemini/Kconfig"
 819
 820 source "arch/arm/mach-h720x/Kconfig"
 821
 822 source "arch/arm/mach-integrator/Kconfig"
 823
 824 source "arch/arm/mach-iop32x/Kconfig"
 825
 826 source "arch/arm/mach-iop33x/Kconfig"
 827
 828 source "arch/arm/mach-iop13xx/Kconfig"
 829
 830 source "arch/arm/mach-ixp4xx/Kconfig"
 831
 832 source "arch/arm/mach-ixp2000/Kconfig"
 833
 834 source "arch/arm/mach-ixp23xx/Kconfig"
 835
 836 source "arch/arm/mach-kirkwood/Kconfig"
 837
 838 source "arch/arm/mach-ks8695/Kconfig"
 839
 840 source "arch/arm/mach-lh7a40x/Kconfig"
 841
 842 source "arch/arm/mach-loki/Kconfig"
 843
 844 source "arch/arm/mach-msm/Kconfig"
 845
 846 source "arch/arm/mach-mv78xx0/Kconfig"
 847
 848 source "arch/arm/plat-mxc/Kconfig"
 849
 850 source "arch/arm/mach-netx/Kconfig"
 851
 852 source "arch/arm/mach-nomadik/Kconfig"
 853 source "arch/arm/plat-nomadik/Kconfig"
 854
 855 source "arch/arm/mach-ns9xxx/Kconfig"
 856
 857 source "arch/arm/mach-nuc93x/Kconfig"
 858
 859 source "arch/arm/plat-omap/Kconfig"
 860
 861 source "arch/arm/mach-omap1/Kconfig"
 862
 863 source "arch/arm/mach-omap2/Kconfig"
 864
 865 source "arch/arm/mach-orion5x/Kconfig"
 866
 867 source "arch/arm/mach-pxa/Kconfig"
 868 source "arch/arm/plat-pxa/Kconfig"
 869
 870 source "arch/arm/mach-mmp/Kconfig"
 871
 872 source "arch/arm/mach-realview/Kconfig"
 873
 874 source "arch/arm/mach-sa1100/Kconfig"
 875
 876 source "arch/arm/plat-samsung/Kconfig"
 877 source "arch/arm/plat-s3c24xx/Kconfig"
 878 source "arch/arm/plat-s5p/Kconfig"
 879 source "arch/arm/plat-s5pc1xx/Kconfig"
 880 source "arch/arm/plat-spear/Kconfig"
 881
 882 if ARCH_S3C2410
 883 source "arch/arm/mach-s3c2400/Kconfig"
 884 source "arch/arm/mach-s3c2410/Kconfig"
 885 source "arch/arm/mach-s3c2412/Kconfig"
 886 source "arch/arm/mach-s3c2416/Kconfig"
 887 source "arch/arm/mach-s3c2440/Kconfig"
 888 source "arch/arm/mach-s3c2443/Kconfig"
 889 endif
 890
 891 if ARCH_S3C64XX
 892 source "arch/arm/mach-s3c64xx/Kconfig"
 893 endif
 894
 895 source "arch/arm/mach-s5p6440/Kconfig"
 896
 897 source "arch/arm/mach-s5p6442/Kconfig"
 898
 899 if ARCH_S5PC1XX
 900 source "arch/arm/mach-s5pc100/Kconfig"
 901 endif
 902
 903 source "arch/arm/mach-s5pv210/Kconfig"
 904
 905 source "arch/arm/mach-shmobile/Kconfig"
 906
 907 source "arch/arm/plat-stmp3xxx/Kconfig"
 908
 909 source "arch/arm/mach-u300/Kconfig"
 910
 911 source "arch/arm/mach-ux500/Kconfig"
 912
 913 source "arch/arm/mach-versatile/Kconfig"
 914
 915 source "arch/arm/mach-vexpress/Kconfig"
 916
 917 source "arch/arm/mach-w90x900/Kconfig"
 918
 919 # Definitions to make life easier
 920 config ARCH_ACORN
 921         bool
 922
 923 config PLAT_IOP
 924         bool
 925         select GENERIC_CLOCKEVENTS
 926
 927 config PLAT_ORION
 928         bool
 929
 930 config PLAT_PXA
 931         bool
 932
 933 config PLAT_VERSATILE
 934         bool
 935
 936 config ARM_TIMER_SP804
 937         bool
 938
 939 source arch/arm/mm/Kconfig
 940
 941 config IWMMXT
 942         bool "Enable iWMMXt support"
 943         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 944         default y if PXA27x || PXA3xx || ARCH_MMP
 945         help
 946           Enable support for iWMMXt context switching at run time if
 947           running on a CPU that supports it.
 948
 949 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 950 config XSCALE_PMU
 951         bool
 952         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 953         default y
 954
 955 config CPU_HAS_PMU
 956         depends on CPU_V6 || CPU_V7 || XSCALE_PMU
 957         default y
 958         bool
 959
 960 if !MMU
 961 source "arch/arm/Kconfig-nommu"
 962 endif
 963
 964 config ARM_ERRATA_411920
 965         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 966         depends on CPU_V6 && !SMP
 967         help
 968           Invalidation of the Instruction Cache operation can
 969           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 970           It does not affect the MPCore. This option enables the ARM Ltd.
 971           recommended workaround.
 972
 973 config ARM_ERRATA_430973
 974         bool "ARM errata: Stale prediction on replaced interworking branch"
 975         depends on CPU_V7
 976         help
 977           This option enables the workaround for the 430973 Cortex-A8
 978           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 979           interworking branch is replaced with another code sequence at the
 980           same virtual address, whether due to self-modifying code or virtual
 981           to physical address re-mapping, Cortex-A8 does not recover from the
 982           stale interworking branch prediction. This results in Cortex-A8
 983           executing the new code sequence in the incorrect ARM or Thumb state.
 984           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 985           and also flushes the branch target cache at every context switch.
 986           Note that setting specific bits in the ACTLR register may not be
 987           available in non-secure mode.
 988
 989 config ARM_ERRATA_458693
 990         bool "ARM errata: Processor deadlock when a false hazard is created"
 991         depends on CPU_V7
 992         help
 993           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
 994           erratum. For very specific sequences of memory operations, it is
 995           possible for a hazard condition intended for a cache line to instead
 996           be incorrectly associated with a different cache line. This false
 997           hazard might then cause a processor deadlock. The workaround enables
 998           the L1 caching of the NEON accesses and disables the PLD instruction
 999           in the ACTLR register. Note that setting specific bits in the ACTLR
1000           register may not be available in non-secure mode.
1001
1002 config ARM_ERRATA_460075
1003         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1004         depends on CPU_V7
1005         help
1006           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1007           erratum. Any asynchronous access to the L2 cache may encounter a
1008           situation in which recent store transactions to the L2 cache are lost
1009           and overwritten with stale memory contents from external memory. The
1010           workaround disables the write-allocate mode for the L2 cache via the
1011           ACTLR register. Note that setting specific bits in the ACTLR register
1012           may not be available in non-secure mode.
1013
1014 config PL310_ERRATA_588369
1015         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1016         depends on CACHE_L2X0 && ARCH_OMAP4
1017         help
1018            The PL310 L2 cache controller implements three types of Clean &
1019            Invalidate maintenance operations: by Physical Address
1020            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1021            They are architecturally defined to behave as the execution of a
1022            clean operation followed immediately by an invalidate operation,
1023            both performing to the same memory location. This functionality
1024            is not correctly implemented in PL310 as clean lines are not
1025            invalidated as a result of these operations. Note that this errata
1026            uses Texas Instrument's secure monitor api.
1027 endmenu
1028
1029 source "arch/arm/common/Kconfig"
1030
1031 config FORCE_MAX_ZONEORDER
1032         int
1033         depends on SA1111
1034         default "9"
1035
1036 menu "Bus support"
1037
1038 config ARM_AMBA
1039         bool
1040
1041 config ISA
1042         bool
1043         help
1044           Find out whether you have ISA slots on your motherboard.  ISA is the
1045           name of a bus system, i.e. the way the CPU talks to the other stuff
1046           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1047           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1048           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1049
1050 # Select ISA DMA controller support
1051 config ISA_DMA
1052         bool
1053         select ISA_DMA_API
1054
1055 # Select ISA DMA interface
1056 config ISA_DMA_API
1057         bool
1058
1059 config PCI
1060         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1061         help
1062           Find out whether you have a PCI motherboard. PCI is the name of a
1063           bus system, i.e. the way the CPU talks to the other stuff inside
1064           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1065           VESA. If you have PCI, say Y, otherwise N.
1066
1067 config PCI_DOMAINS
1068         bool
1069         depends on PCI
1070
1071 config PCI_SYSCALL
1072         def_bool PCI
1073
1074 # Select the host bridge type
1075 config PCI_HOST_VIA82C505
1076         bool
1077         depends on PCI && ARCH_SHARK
1078         default y
1079
1080 config PCI_HOST_ITE8152
1081         bool
1082         depends on PCI && MACH_ARMCORE
1083         default y
1084         select DMABOUNCE
1085
1086 source "drivers/pci/Kconfig"
1087
1088 source "drivers/pcmcia/Kconfig"
1089
1090 endmenu
1091
1092 menu "Kernel Features"
1093
1094 source "kernel/time/Kconfig"
1095
1096 config SMP
1097         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1098         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1099                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
1100                  ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1101         depends on GENERIC_CLOCKEVENTS
1102         select USE_GENERIC_SMP_HELPERS
1103         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1104         help
1105           This enables support for systems with more than one CPU. If you have
1106           a system with only one CPU, like most personal computers, say N. If
1107           you have a system with more than one CPU, say Y.
1108
1109           If you say N here, the kernel will run on single and multiprocessor
1110           machines, but will use only one CPU of a multiprocessor machine. If
1111           you say Y here, the kernel will run on many, but not all, single
1112           processor machines. On a single processor machine, the kernel will
1113           run faster if you say N here.
1114
1115           See also <file:Documentation/i386/IO-APIC.txt>,
1116           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1117           <http://www.linuxdoc.org/docs.html#howto>.
1118
1119           If you don't know what to do here, say N.
1120
1121 config HAVE_ARM_SCU
1122         bool
1123         depends on SMP
1124         help
1125           This option enables support for the ARM system coherency unit
1126
1127 config HAVE_ARM_TWD
1128         bool
1129         depends on SMP
1130         help
1131           This options enables support for the ARM timer and watchdog unit
1132
1133 choice
1134         prompt "Memory split"
1135         default VMSPLIT_3G
1136         help
1137           Select the desired split between kernel and user memory.
1138
1139           If you are not absolutely sure what you are doing, leave this
1140           option alone!
1141
1142         config VMSPLIT_3G
1143                 bool "3G/1G user/kernel split"
1144         config VMSPLIT_2G
1145                 bool "2G/2G user/kernel split"
1146         config VMSPLIT_1G
1147                 bool "1G/3G user/kernel split"
1148 endchoice
1149
1150 config PAGE_OFFSET
1151         hex
1152         default 0x40000000 if VMSPLIT_1G
1153         default 0x80000000 if VMSPLIT_2G
1154         default 0xC0000000
1155
1156 config NR_CPUS
1157         int "Maximum number of CPUs (2-32)"
1158         range 2 32
1159         depends on SMP
1160         default "4"
1161
1162 config HOTPLUG_CPU
1163         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1164         depends on SMP && HOTPLUG && EXPERIMENTAL
1165         help
1166           Say Y here to experiment with turning CPUs off and on.  CPUs
1167           can be controlled through /sys/devices/system/cpu.
1168
1169 config LOCAL_TIMERS
1170         bool "Use local timer interrupts"
1171         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1172                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1173         default y
1174         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1175         help
1176           Enable support for local timers on SMP platforms, rather then the
1177           legacy IPI broadcast method.  Local timers allows the system
1178           accounting to be spread across the timer interval, preventing a
1179           "thundering herd" at every timer tick.
1180
1181 source kernel/Kconfig.preempt
1182
1183 config HZ
1184         int
1185         default 128 if ARCH_L7200
1186         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
1187         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1188         default AT91_TIMER_HZ if ARCH_AT91
1189         default 100
1190
1191 config THUMB2_KERNEL
1192         bool "Compile the kernel in Thumb-2 mode"
1193         depends on CPU_V7 && EXPERIMENTAL
1194         select AEABI
1195         select ARM_ASM_UNIFIED
1196         help
1197           By enabling this option, the kernel will be compiled in
1198           Thumb-2 mode. A compiler/assembler that understand the unified
1199           ARM-Thumb syntax is needed.
1200
1201           If unsure, say N.
1202
1203 config ARM_ASM_UNIFIED
1204         bool
1205
1206 config AEABI
1207         bool "Use the ARM EABI to compile the kernel"
1208         help
1209           This option allows for the kernel to be compiled using the latest
1210           ARM ABI (aka EABI).  This is only useful if you are using a user
1211           space environment that is also compiled with EABI.
1212
1213           Since there are major incompatibilities between the legacy ABI and
1214           EABI, especially with regard to structure member alignment, this
1215           option also changes the kernel syscall calling convention to
1216           disambiguate both ABIs and allow for backward compatibility support
1217           (selected with CONFIG_OABI_COMPAT).
1218
1219           To use this you need GCC version 4.0.0 or later.
1220
1221 config OABI_COMPAT
1222         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1223         depends on AEABI && EXPERIMENTAL
1224         default y
1225         help
1226           This option preserves the old syscall interface along with the
1227           new (ARM EABI) one. It also provides a compatibility layer to
1228           intercept syscalls that have structure arguments which layout
1229           in memory differs between the legacy ABI and the new ARM EABI
1230           (only for non "thumb" binaries). This option adds a tiny
1231           overhead to all syscalls and produces a slightly larger kernel.
1232           If you know you'll be using only pure EABI user space then you
1233           can say N here. If this option is not selected and you attempt
1234           to execute a legacy ABI binary then the result will be
1235           UNPREDICTABLE (in fact it can be predicted that it won't work
1236           at all). If in doubt say Y.
1237
1238 config ARCH_HAS_HOLES_MEMORYMODEL
1239         bool
1240
1241 # Discontigmem is deprecated
1242 config ARCH_DISCONTIGMEM_ENABLE
1243         bool
1244
1245 config ARCH_SPARSEMEM_ENABLE
1246         bool
1247
1248 config ARCH_SPARSEMEM_DEFAULT
1249         def_bool ARCH_SPARSEMEM_ENABLE
1250
1251 config ARCH_SELECT_MEMORY_MODEL
1252         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1253
1254 config NODES_SHIFT
1255         int
1256         default "4" if ARCH_LH7A40X
1257         default "2"
1258         depends on NEED_MULTIPLE_NODES
1259
1260 config HIGHMEM
1261         bool "High Memory Support (EXPERIMENTAL)"
1262         depends on MMU && EXPERIMENTAL
1263         help
1264           The address space of ARM processors is only 4 Gigabytes large
1265           and it has to accommodate user address space, kernel address
1266           space as well as some memory mapped IO. That means that, if you
1267           have a large amount of physical memory and/or IO, not all of the
1268           memory can be "permanently mapped" by the kernel. The physical
1269           memory that is not permanently mapped is called "high memory".
1270
1271           Depending on the selected kernel/user memory split, minimum
1272           vmalloc space and actual amount of RAM, you may not need this
1273           option which should result in a slightly faster kernel.
1274
1275           If unsure, say n.
1276
1277 config HIGHPTE
1278         bool "Allocate 2nd-level pagetables from highmem"
1279         depends on HIGHMEM
1280         depends on !OUTER_CACHE
1281
1282 config HW_PERF_EVENTS
1283         bool "Enable hardware performance counter support for perf events"
1284         depends on PERF_EVENTS && CPU_HAS_PMU
1285         default y
1286         help
1287           Enable hardware performance counter support for perf events. If
1288           disabled, perf events will use software events only.
1289
1290 source "mm/Kconfig"
1291
1292 config LEDS
1293         bool "Timer and CPU usage LEDs"
1294         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1295                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1296                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1297                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1298                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1299                    ARCH_AT91 || ARCH_DAVINCI || \
1300                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1301         help
1302           If you say Y here, the LEDs on your machine will be used
1303           to provide useful information about your current system status.
1304
1305           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1306           be able to select which LEDs are active using the options below. If
1307           you are compiling a kernel for the EBSA-110 or the LART however, the
1308           red LED will simply flash regularly to indicate that the system is
1309           still functional. It is safe to say Y here if you have a CATS
1310           system, but the driver will do nothing.
1311
1312 config LEDS_TIMER
1313         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1314                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1315                             || MACH_OMAP_PERSEUS2
1316         depends on LEDS
1317         depends on !GENERIC_CLOCKEVENTS
1318         default y if ARCH_EBSA110
1319         help
1320           If you say Y here, one of the system LEDs (the green one on the
1321           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1322           will flash regularly to indicate that the system is still
1323           operational. This is mainly useful to kernel hackers who are
1324           debugging unstable kernels.
1325
1326           The LART uses the same LED for both Timer LED and CPU usage LED
1327           functions. You may choose to use both, but the Timer LED function
1328           will overrule the CPU usage LED.
1329
1330 config LEDS_CPU
1331         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1332                         !ARCH_OMAP) \
1333                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1334                         || MACH_OMAP_PERSEUS2
1335         depends on LEDS
1336         help
1337           If you say Y here, the red LED will be used to give a good real
1338           time indication of CPU usage, by lighting whenever the idle task
1339           is not currently executing.
1340
1341           The LART uses the same LED for both Timer LED and CPU usage LED
1342           functions. You may choose to use both, but the Timer LED function
1343           will overrule the CPU usage LED.
1344
1345 config ALIGNMENT_TRAP
1346         bool
1347         depends on CPU_CP15_MMU
1348         default y if !ARCH_EBSA110
1349         select HAVE_PROC_CPU if PROC_FS
1350         help
1351           ARM processors cannot fetch/store information which is not
1352           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1353           address divisible by 4. On 32-bit ARM processors, these non-aligned
1354           fetch/store instructions will be emulated in software if you say
1355           here, which has a severe performance impact. This is necessary for
1356           correct operation of some network protocols. With an IP-only
1357           configuration it is safe to say N, otherwise say Y.
1358
1359 config UACCESS_WITH_MEMCPY
1360         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1361         depends on MMU && EXPERIMENTAL
1362         default y if CPU_FEROCEON
1363         help
1364           Implement faster copy_to_user and clear_user methods for CPU
1365           cores where a 8-word STM instruction give significantly higher
1366           memory write throughput than a sequence of individual 32bit stores.
1367
1368           A possible side effect is a slight increase in scheduling latency
1369           between threads sharing the same address space if they invoke
1370           such copy operations with large buffers.
1371
1372           However, if the CPU data cache is using a write-allocate mode,
1373           this option is unlikely to provide any performance gain.
1374
1375 endmenu
1376
1377 menu "Boot options"
1378
1379 # Compressed boot loader in ROM.  Yes, we really want to ask about
1380 # TEXT and BSS so we preserve their values in the config files.
1381 config ZBOOT_ROM_TEXT
1382         hex "Compressed ROM boot loader base address"
1383         default "0"
1384         help
1385           The physical address at which the ROM-able zImage is to be
1386           placed in the target.  Platforms which normally make use of
1387           ROM-able zImage formats normally set this to a suitable
1388           value in their defconfig file.
1389
1390           If ZBOOT_ROM is not enabled, this has no effect.
1391
1392 config ZBOOT_ROM_BSS
1393         hex "Compressed ROM boot loader BSS address"
1394         default "0"
1395         help
1396           The base address of an area of read/write memory in the target
1397           for the ROM-able zImage which must be available while the
1398           decompressor is running. It must be large enough to hold the
1399           entire decompressed kernel plus an additional 128 KiB.
1400           Platforms which normally make use of ROM-able zImage formats
1401           normally set this to a suitable value in their defconfig file.
1402
1403           If ZBOOT_ROM is not enabled, this has no effect.
1404
1405 config ZBOOT_ROM
1406         bool "Compressed boot loader in ROM/flash"
1407         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1408         help
1409           Say Y here if you intend to execute your compressed kernel image
1410           (zImage) directly from ROM or flash.  If unsure, say N.
1411
1412 config CMDLINE
1413         string "Default kernel command string"
1414         default ""
1415         help
1416           On some architectures (EBSA110 and CATS), there is currently no way
1417           for the boot loader to pass arguments to the kernel. For these
1418           architectures, you should supply some command-line options at build
1419           time by entering them here. As a minimum, you should specify the
1420           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1421
1422 config XIP_KERNEL
1423         bool "Kernel Execute-In-Place from ROM"
1424         depends on !ZBOOT_ROM
1425         help
1426           Execute-In-Place allows the kernel to run from non-volatile storage
1427           directly addressable by the CPU, such as NOR flash. This saves RAM
1428           space since the text section of the kernel is not loaded from flash
1429           to RAM.  Read-write sections, such as the data section and stack,
1430           are still copied to RAM.  The XIP kernel is not compressed since
1431           it has to run directly from flash, so it will take more space to
1432           store it.  The flash address used to link the kernel object files,
1433           and for storing it, is configuration dependent. Therefore, if you
1434           say Y here, you must know the proper physical address where to
1435           store the kernel image depending on your own flash memory usage.
1436
1437           Also note that the make target becomes "make xipImage" rather than
1438           "make zImage" or "make Image".  The final kernel binary to put in
1439           ROM memory will be arch/arm/boot/xipImage.
1440
1441           If unsure, say N.
1442
1443 config XIP_PHYS_ADDR
1444         hex "XIP Kernel Physical Location"
1445         depends on XIP_KERNEL
1446         default "0x00080000"
1447         help
1448           This is the physical address in your flash memory the kernel will
1449           be linked for and stored to.  This address is dependent on your
1450           own flash usage.
1451
1452 config KEXEC
1453         bool "Kexec system call (EXPERIMENTAL)"
1454         depends on EXPERIMENTAL
1455         help
1456           kexec is a system call that implements the ability to shutdown your
1457           current kernel, and to start another kernel.  It is like a reboot
1458           but it is independent of the system firmware.   And like a reboot
1459           you can start any kernel with it, not just Linux.
1460
1461           It is an ongoing process to be certain the hardware in a machine
1462           is properly shutdown, so do not be surprised if this code does not
1463           initially work for you.  It may help to enable device hotplugging
1464           support.
1465
1466 config ATAGS_PROC
1467         bool "Export atags in procfs"
1468         depends on KEXEC
1469         default y
1470         help
1471           Should the atags used to boot the kernel be exported in an "atags"
1472           file in procfs. Useful with kexec.
1473
1474 endmenu
1475
1476 menu "CPU Power Management"
1477
1478 if ARCH_HAS_CPUFREQ
1479
1480 source "drivers/cpufreq/Kconfig"
1481
1482 config CPU_FREQ_SA1100
1483         bool
1484
1485 config CPU_FREQ_SA1110
1486         bool
1487
1488 config CPU_FREQ_INTEGRATOR
1489         tristate "CPUfreq driver for ARM Integrator CPUs"
1490         depends on ARCH_INTEGRATOR && CPU_FREQ
1491         default y
1492         help
1493           This enables the CPUfreq driver for ARM Integrator CPUs.
1494
1495           For details, take a look at <file:Documentation/cpu-freq>.
1496
1497           If in doubt, say Y.
1498
1499 config CPU_FREQ_PXA
1500         bool
1501         depends on CPU_FREQ && ARCH_PXA && PXA25x
1502         default y
1503         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1504
1505 config CPU_FREQ_S3C64XX
1506         bool "CPUfreq support for Samsung S3C64XX CPUs"
1507         depends on CPU_FREQ && CPU_S3C6410
1508
1509 config CPU_FREQ_S3C
1510         bool
1511         help
1512           Internal configuration node for common cpufreq on Samsung SoC
1513
1514 config CPU_FREQ_S3C24XX
1515         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1516         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1517         select CPU_FREQ_S3C
1518         help
1519           This enables the CPUfreq driver for the Samsung S3C24XX family
1520           of CPUs.
1521
1522           For details, take a look at <file:Documentation/cpu-freq>.
1523
1524           If in doubt, say N.
1525
1526 config CPU_FREQ_S3C24XX_PLL
1527         bool "Support CPUfreq changing of PLL frequency"
1528         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1529         help
1530           Compile in support for changing the PLL frequency from the
1531           S3C24XX series CPUfreq driver. The PLL takes time to settle
1532           after a frequency change, so by default it is not enabled.
1533
1534           This also means that the PLL tables for the selected CPU(s) will
1535           be built which may increase the size of the kernel image.
1536
1537 config CPU_FREQ_S3C24XX_DEBUG
1538         bool "Debug CPUfreq Samsung driver core"
1539         depends on CPU_FREQ_S3C24XX
1540         help
1541           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1542
1543 config CPU_FREQ_S3C24XX_IODEBUG
1544         bool "Debug CPUfreq Samsung driver IO timing"
1545         depends on CPU_FREQ_S3C24XX
1546         help
1547           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1548
1549 config CPU_FREQ_S3C24XX_DEBUGFS
1550         bool "Export debugfs for CPUFreq"
1551         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1552         help
1553           Export status information via debugfs.
1554
1555 endif
1556
1557 source "drivers/cpuidle/Kconfig"
1558
1559 endmenu
1560
1561 menu "Floating point emulation"
1562
1563 comment "At least one emulation must be selected"
1564
1565 config FPE_NWFPE
1566         bool "NWFPE math emulation"
1567         depends on !AEABI || OABI_COMPAT
1568         ---help---
1569           Say Y to include the NWFPE floating point emulator in the kernel.
1570           This is necessary to run most binaries. Linux does not currently
1571           support floating point hardware so you need to say Y here even if
1572           your machine has an FPA or floating point co-processor podule.
1573
1574           You may say N here if you are going to load the Acorn FPEmulator
1575           early in the bootup.
1576
1577 config FPE_NWFPE_XP
1578         bool "Support extended precision"
1579         depends on FPE_NWFPE
1580         help
1581           Say Y to include 80-bit support in the kernel floating-point
1582           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1583           Note that gcc does not generate 80-bit operations by default,
1584           so in most cases this option only enlarges the size of the
1585           floating point emulator without any good reason.
1586
1587           You almost surely want to say N here.
1588
1589 config FPE_FASTFPE
1590         bool "FastFPE math emulation (EXPERIMENTAL)"
1591         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1592         ---help---
1593           Say Y here to include the FAST floating point emulator in the kernel.
1594           This is an experimental much faster emulator which now also has full
1595           precision for the mantissa.  It does not support any exceptions.
1596           It is very simple, and approximately 3-6 times faster than NWFPE.
1597
1598           It should be sufficient for most programs.  It may be not suitable
1599           for scientific calculations, but you have to check this for yourself.
1600           If you do not feel you need a faster FP emulation you should better
1601           choose NWFPE.
1602
1603 config VFP
1604         bool "VFP-format floating point maths"
1605         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1606         help
1607           Say Y to include VFP support code in the kernel. This is needed
1608           if your hardware includes a VFP unit.
1609
1610           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1611           release notes and additional status information.
1612
1613           Say N if your target does not have VFP hardware.
1614
1615 config VFPv3
1616         bool
1617         depends on VFP
1618         default y if CPU_V7
1619
1620 config NEON
1621         bool "Advanced SIMD (NEON) Extension support"
1622         depends on VFPv3 && CPU_V7
1623         help
1624           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1625           Extension.
1626
1627 endmenu
1628
1629 menu "Userspace binary formats"
1630
1631 source "fs/Kconfig.binfmt"
1632
1633 config ARTHUR
1634         tristate "RISC OS personality"
1635         depends on !AEABI
1636         help
1637           Say Y here to include the kernel code necessary if you want to run
1638           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1639           experimental; if this sounds frightening, say N and sleep in peace.
1640           You can also say M here to compile this support as a module (which
1641           will be called arthur).
1642
1643 endmenu
1644
1645 menu "Power management options"
1646
1647 source "kernel/power/Kconfig"
1648
1649 config ARCH_SUSPEND_POSSIBLE
1650         def_bool y
1651
1652 endmenu
1653
1654 source "net/Kconfig"
1655
1656 source "drivers/Kconfig"
1657
1658 source "fs/Kconfig"
1659
1660 source "arch/arm/Kconfig.debug"
1661
1662 source "security/Kconfig"
1663
1664 source "crypto/Kconfig"
1665
1666 source "lib/Kconfig"