arch/arm/Kconfig

   1 config ARM
   2         bool
   3         default y
   4         select HAVE_AOUT
   5         select HAVE_IDE
   6         select HAVE_MEMBLOCK
   7         select RTC_LIB
   8         select SYS_SUPPORTS_APM_EMULATION
   9         select GENERIC_ATOMIC64 if (!CPU_32v6K)
  10         select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  11         select HAVE_ARCH_KGDB
  12         select HAVE_KPROBES if (!XIP_KERNEL)
  13         select HAVE_KRETPROBES if (HAVE_KPROBES)
  14         select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  15         select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  16         select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  17         select HAVE_GENERIC_DMA_COHERENT
  18         select HAVE_KERNEL_GZIP
  19         select HAVE_KERNEL_LZO
  20         select HAVE_KERNEL_LZMA
  21         select HAVE_IRQ_WORK
  22         select HAVE_PERF_EVENTS
  23         select PERF_USE_VMALLOC
  24         select HAVE_REGS_AND_STACK_ACCESS_API
  25         select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V7))
  26         help
  27           The ARM series is a line of low-power-consumption RISC chip designs
  28           licensed by ARM Ltd and targeted at embedded applications and
  29           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  30           manufactured, but legacy ARM-based PC hardware remains popular in
  31           Europe.  There is an ARM Linux project with a web page at
  32           <http://www.arm.linux.org.uk/>.
  33
  34 config HAVE_PWM
  35         bool
  36
  37 config SYS_SUPPORTS_APM_EMULATION
  38         bool
  39
  40 config GENERIC_GPIO
  41         bool
  42
  43 config ARCH_USES_GETTIMEOFFSET
  44         bool
  45         default n
  46
  47 config GENERIC_CLOCKEVENTS
  48         bool
  49
  50 config GENERIC_CLOCKEVENTS_BROADCAST
  51         bool
  52         depends on GENERIC_CLOCKEVENTS
  53         default y if SMP
  54
  55 config HAVE_TCM
  56         bool
  57         select GENERIC_ALLOCATOR
  58
  59 config HAVE_PROC_CPU
  60         bool
  61
  62 config NO_IOPORT
  63         bool
  64
  65 config EISA
  66         bool
  67         ---help---
  68           The Extended Industry Standard Architecture (EISA) bus was
  69           developed as an open alternative to the IBM MicroChannel bus.
  70
  71           The EISA bus provided some of the features of the IBM MicroChannel
  72           bus while maintaining backward compatibility with cards made for
  73           the older ISA bus.  The EISA bus saw limited use between 1988 and
  74           1995 when it was made obsolete by the PCI bus.
  75
  76           Say Y here if you are building a kernel for an EISA-based machine.
  77
  78           Otherwise, say N.
  79
  80 config SBUS
  81         bool
  82
  83 config MCA
  84         bool
  85         help
  86           MicroChannel Architecture is found in some IBM PS/2 machines and
  87           laptops.  It is a bus system similar to PCI or ISA. See
  88           <file:Documentation/mca.txt> (and especially the web page given
  89           there) before attempting to build an MCA bus kernel.
  90
  91 config GENERIC_HARDIRQS
  92         bool
  93         default y
  94
  95 config STACKTRACE_SUPPORT
  96         bool
  97         default y
  98
  99 config HAVE_LATENCYTOP_SUPPORT
 100         bool
 101         depends on !SMP
 102         default y
 103
 104 config LOCKDEP_SUPPORT
 105         bool
 106         default y
 107
 108 config TRACE_IRQFLAGS_SUPPORT
 109         bool
 110         default y
 111
 112 config HARDIRQS_SW_RESEND
 113         bool
 114         default y
 115
 116 config GENERIC_IRQ_PROBE
 117         bool
 118         default y
 119
 120 config GENERIC_LOCKBREAK
 121         bool
 122         default y
 123         depends on SMP && PREEMPT
 124
 125 config RWSEM_GENERIC_SPINLOCK
 126         bool
 127         default y
 128
 129 config RWSEM_XCHGADD_ALGORITHM
 130         bool
 131
 132 config ARCH_HAS_ILOG2_U32
 133         bool
 134
 135 config ARCH_HAS_ILOG2_U64
 136         bool
 137
 138 config ARCH_HAS_CPUFREQ
 139         bool
 140         help
 141           Internal node to signify that the ARCH has CPUFREQ support
 142           and that the relevant menu configurations are displayed for
 143           it.
 144
 145 config ARCH_HAS_CPU_IDLE_WAIT
 146        def_bool y
 147
 148 config GENERIC_HWEIGHT
 149         bool
 150         default y
 151
 152 config GENERIC_CALIBRATE_DELAY
 153         bool
 154         default y
 155
 156 config ARCH_MAY_HAVE_PC_FDC
 157         bool
 158
 159 config ZONE_DMA
 160         bool
 161
 162 config NEED_DMA_MAP_STATE
 163        def_bool y
 164
 165 config GENERIC_ISA_DMA
 166         bool
 167
 168 config FIQ
 169         bool
 170
 171 config ARCH_MTD_XIP
 172         bool
 173
 174 config GENERIC_HARDIRQS_NO__DO_IRQ
 175         def_bool y
 176
 177 config ARM_L1_CACHE_SHIFT_6
 178         bool
 179         help
 180           Setting ARM L1 cache line size to 64 Bytes.
 181
 182 config VECTORS_BASE
 183         hex
 184         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 185         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 186         default 0x00000000
 187         help
 188           The base address of exception vectors.
 189
 190 source "init/Kconfig"
 191
 192 source "kernel/Kconfig.freezer"
 193
 194 menu "System Type"
 195
 196 config MMU
 197         bool "MMU-based Paged Memory Management Support"
 198         default y
 199         help
 200           Select if you want MMU-based virtualised addressing space
 201           support by paged memory management. If unsure, say 'Y'.
 202
 203 #
 204 # The "ARM system type" choice list is ordered alphabetically by option
 205 # text.  Please add new entries in the option alphabetic order.
 206 #
 207 choice
 208         prompt "ARM system type"
 209         default ARCH_VERSATILE
 210
 211 config ARCH_AAEC2000
 212         bool "Agilent AAEC-2000 based"
 213         select CPU_ARM920T
 214         select ARM_AMBA
 215         select HAVE_CLK
 216         select ARCH_USES_GETTIMEOFFSET
 217         help
 218           This enables support for systems based on the Agilent AAEC-2000
 219
 220 config ARCH_INTEGRATOR
 221         bool "ARM Ltd. Integrator family"
 222         select ARM_AMBA
 223         select ARCH_HAS_CPUFREQ
 224         select COMMON_CLKDEV
 225         select ICST
 226         select GENERIC_CLOCKEVENTS
 227         select PLAT_VERSATILE
 228         help
 229           Support for ARM's Integrator platform.
 230
 231 config ARCH_REALVIEW
 232         bool "ARM Ltd. RealView family"
 233         select ARM_AMBA
 234         select COMMON_CLKDEV
 235         select ICST
 236         select GENERIC_CLOCKEVENTS
 237         select ARCH_WANT_OPTIONAL_GPIOLIB
 238         select PLAT_VERSATILE
 239         select ARM_TIMER_SP804
 240         select GPIO_PL061 if GPIOLIB
 241         help
 242           This enables support for ARM Ltd RealView boards.
 243
 244 config ARCH_VERSATILE
 245         bool "ARM Ltd. Versatile family"
 246         select ARM_AMBA
 247         select ARM_VIC
 248         select COMMON_CLKDEV
 249         select ICST
 250         select GENERIC_CLOCKEVENTS
 251         select ARCH_WANT_OPTIONAL_GPIOLIB
 252         select PLAT_VERSATILE
 253         select ARM_TIMER_SP804
 254         help
 255           This enables support for ARM Ltd Versatile board.
 256
 257 config ARCH_VEXPRESS
 258         bool "ARM Ltd. Versatile Express family"
 259         select ARCH_WANT_OPTIONAL_GPIOLIB
 260         select ARM_AMBA
 261         select ARM_TIMER_SP804
 262         select COMMON_CLKDEV
 263         select GENERIC_CLOCKEVENTS
 264         select HAVE_CLK
 265         select ICST
 266         select PLAT_VERSATILE
 267         help
 268           This enables support for the ARM Ltd Versatile Express boards.
 269
 270 config ARCH_AT91
 271         bool "Atmel AT91"
 272         select ARCH_REQUIRE_GPIOLIB
 273         select HAVE_CLK
 274         help
 275           This enables support for systems based on the Atmel AT91RM9200,
 276           AT91SAM9 and AT91CAP9 processors.
 277
 278 config ARCH_BCMRING
 279         bool "Broadcom BCMRING"
 280         depends on MMU
 281         select CPU_V6
 282         select ARM_AMBA
 283         select COMMON_CLKDEV
 284         select GENERIC_CLOCKEVENTS
 285         select ARCH_WANT_OPTIONAL_GPIOLIB
 286         help
 287           Support for Broadcom's BCMRing platform.
 288
 289 config ARCH_CLPS711X
 290         bool "Cirrus Logic CLPS711x/EP721x-based"
 291         select CPU_ARM720T
 292         select ARCH_USES_GETTIMEOFFSET
 293         help
 294           Support for Cirrus Logic 711x/721x based boards.
 295
 296 config ARCH_CNS3XXX
 297         bool "Cavium Networks CNS3XXX family"
 298         select CPU_V6
 299         select GENERIC_CLOCKEVENTS
 300         select ARM_GIC
 301         select PCI_DOMAINS if PCI
 302         help
 303           Support for Cavium Networks CNS3XXX platform.
 304
 305 config ARCH_GEMINI
 306         bool "Cortina Systems Gemini"
 307         select CPU_FA526
 308         select ARCH_REQUIRE_GPIOLIB
 309         select ARCH_USES_GETTIMEOFFSET
 310         help
 311           Support for the Cortina Systems Gemini family SoCs
 312
 313 config ARCH_EBSA110
 314         bool "EBSA-110"
 315         select CPU_SA110
 316         select ISA
 317         select NO_IOPORT
 318         select ARCH_USES_GETTIMEOFFSET
 319         help
 320           This is an evaluation board for the StrongARM processor available
 321           from Digital. It has limited hardware on-board, including an
 322           Ethernet interface, two PCMCIA sockets, two serial ports and a
 323           parallel port.
 324
 325 config ARCH_EP93XX
 326         bool "EP93xx-based"
 327         select CPU_ARM920T
 328         select ARM_AMBA
 329         select ARM_VIC
 330         select COMMON_CLKDEV
 331         select ARCH_REQUIRE_GPIOLIB
 332         select ARCH_HAS_HOLES_MEMORYMODEL
 333         select ARCH_USES_GETTIMEOFFSET
 334         help
 335           This enables support for the Cirrus EP93xx series of CPUs.
 336
 337 config ARCH_FOOTBRIDGE
 338         bool "FootBridge"
 339         select CPU_SA110
 340         select FOOTBRIDGE
 341         select ARCH_USES_GETTIMEOFFSET
 342         help
 343           Support for systems based on the DC21285 companion chip
 344           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 345
 346 config ARCH_MXC
 347         bool "Freescale MXC/iMX-based"
 348         select GENERIC_CLOCKEVENTS
 349         select ARCH_REQUIRE_GPIOLIB
 350         select COMMON_CLKDEV
 351         help
 352           Support for Freescale MXC/iMX-based family of processors
 353
 354 config ARCH_STMP3XXX
 355         bool "Freescale STMP3xxx"
 356         select CPU_ARM926T
 357         select COMMON_CLKDEV
 358         select ARCH_REQUIRE_GPIOLIB
 359         select GENERIC_CLOCKEVENTS
 360         select USB_ARCH_HAS_EHCI
 361         help
 362           Support for systems based on the Freescale 3xxx CPUs.
 363
 364 config ARCH_NETX
 365         bool "Hilscher NetX based"
 366         select CPU_ARM926T
 367         select ARM_VIC
 368         select GENERIC_CLOCKEVENTS
 369         help
 370           This enables support for systems based on the Hilscher NetX Soc
 371
 372 config ARCH_H720X
 373         bool "Hynix HMS720x-based"
 374         select CPU_ARM720T
 375         select ISA_DMA_API
 376         select ARCH_USES_GETTIMEOFFSET
 377         help
 378           This enables support for systems based on the Hynix HMS720x
 379
 380 config ARCH_IOP13XX
 381         bool "IOP13xx-based"
 382         depends on MMU
 383         select CPU_XSC3
 384         select PLAT_IOP
 385         select PCI
 386         select ARCH_SUPPORTS_MSI
 387         select VMSPLIT_1G
 388         help
 389           Support for Intel's IOP13XX (XScale) family of processors.
 390
 391 config ARCH_IOP32X
 392         bool "IOP32x-based"
 393         depends on MMU
 394         select CPU_XSCALE
 395         select PLAT_IOP
 396         select PCI
 397         select ARCH_REQUIRE_GPIOLIB
 398         help
 399           Support for Intel's 80219 and IOP32X (XScale) family of
 400           processors.
 401
 402 config ARCH_IOP33X
 403         bool "IOP33x-based"
 404         depends on MMU
 405         select CPU_XSCALE
 406         select PLAT_IOP
 407         select PCI
 408         select ARCH_REQUIRE_GPIOLIB
 409         help
 410           Support for Intel's IOP33X (XScale) family of processors.
 411
 412 config ARCH_IXP23XX
 413         bool "IXP23XX-based"
 414         depends on MMU
 415         select CPU_XSC3
 416         select PCI
 417         select ARCH_USES_GETTIMEOFFSET
 418         help
 419           Support for Intel's IXP23xx (XScale) family of processors.
 420
 421 config ARCH_IXP2000
 422         bool "IXP2400/2800-based"
 423         depends on MMU
 424         select CPU_XSCALE
 425         select PCI
 426         select ARCH_USES_GETTIMEOFFSET
 427         help
 428           Support for Intel's IXP2400/2800 (XScale) family of processors.
 429
 430 config ARCH_IXP4XX
 431         bool "IXP4xx-based"
 432         depends on MMU
 433         select CPU_XSCALE
 434         select GENERIC_GPIO
 435         select GENERIC_CLOCKEVENTS
 436         select DMABOUNCE if PCI
 437         help
 438           Support for Intel's IXP4XX (XScale) family of processors.
 439
 440 config ARCH_DOVE
 441         bool "Marvell Dove"
 442         select PCI
 443         select ARCH_REQUIRE_GPIOLIB
 444         select GENERIC_CLOCKEVENTS
 445         select PLAT_ORION
 446         help
 447           Support for the Marvell Dove SoC 88AP510
 448
 449 config ARCH_KIRKWOOD
 450         bool "Marvell Kirkwood"
 451         select CPU_FEROCEON
 452         select PCI
 453         select ARCH_REQUIRE_GPIOLIB
 454         select GENERIC_CLOCKEVENTS
 455         select PLAT_ORION
 456         help
 457           Support for the following Marvell Kirkwood series SoCs:
 458           88F6180, 88F6192 and 88F6281.
 459
 460 config ARCH_LOKI
 461         bool "Marvell Loki (88RC8480)"
 462         select CPU_FEROCEON
 463         select GENERIC_CLOCKEVENTS
 464         select PLAT_ORION
 465         help
 466           Support for the Marvell Loki (88RC8480) SoC.
 467
 468 config ARCH_LPC32XX
 469         bool "NXP LPC32XX"
 470         select CPU_ARM926T
 471         select ARCH_REQUIRE_GPIOLIB
 472         select HAVE_IDE
 473         select ARM_AMBA
 474         select USB_ARCH_HAS_OHCI
 475         select COMMON_CLKDEV
 476         select GENERIC_TIME
 477         select GENERIC_CLOCKEVENTS
 478         help
 479           Support for the NXP LPC32XX family of processors
 480
 481 config ARCH_MV78XX0
 482         bool "Marvell MV78xx0"
 483         select CPU_FEROCEON
 484         select PCI
 485         select ARCH_REQUIRE_GPIOLIB
 486         select GENERIC_CLOCKEVENTS
 487         select PLAT_ORION
 488         help
 489           Support for the following Marvell MV78xx0 series SoCs:
 490           MV781x0, MV782x0.
 491
 492 config ARCH_ORION5X
 493         bool "Marvell Orion"
 494         depends on MMU
 495         select CPU_FEROCEON
 496         select PCI
 497         select ARCH_REQUIRE_GPIOLIB
 498         select GENERIC_CLOCKEVENTS
 499         select PLAT_ORION
 500         help
 501           Support for the following Marvell Orion 5x series SoCs:
 502           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 503           Orion-2 (5281), Orion-1-90 (6183).
 504
 505 config ARCH_MMP
 506         bool "Marvell PXA168/910/MMP2"
 507         depends on MMU
 508         select ARCH_REQUIRE_GPIOLIB
 509         select COMMON_CLKDEV
 510         select GENERIC_CLOCKEVENTS
 511         select TICK_ONESHOT
 512         select PLAT_PXA
 513         select SPARSE_IRQ
 514         help
 515           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 516
 517 config ARCH_KS8695
 518         bool "Micrel/Kendin KS8695"
 519         select CPU_ARM922T
 520         select ARCH_REQUIRE_GPIOLIB
 521         select ARCH_USES_GETTIMEOFFSET
 522         help
 523           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 524           System-on-Chip devices.
 525
 526 config ARCH_NS9XXX
 527         bool "NetSilicon NS9xxx"
 528         select CPU_ARM926T
 529         select GENERIC_GPIO
 530         select GENERIC_CLOCKEVENTS
 531         select HAVE_CLK
 532         help
 533           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 534           System.
 535
 536           <http://www.digi.com/products/microprocessors/index.jsp>
 537
 538 config ARCH_W90X900
 539         bool "Nuvoton W90X900 CPU"
 540         select CPU_ARM926T
 541         select ARCH_REQUIRE_GPIOLIB
 542         select COMMON_CLKDEV
 543         select GENERIC_CLOCKEVENTS
 544         help
 545           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 546           At present, the w90x900 has been renamed nuc900, regarding
 547           the ARM series product line, you can login the following
 548           link address to know more.
 549
 550           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 551                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 552
 553 config ARCH_NUC93X
 554         bool "Nuvoton NUC93X CPU"
 555         select CPU_ARM926T
 556         select COMMON_CLKDEV
 557         help
 558           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 559           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 560
 561 config ARCH_TEGRA
 562         bool "NVIDIA Tegra"
 563         select GENERIC_TIME
 564         select GENERIC_CLOCKEVENTS
 565         select GENERIC_GPIO
 566         select HAVE_CLK
 567         select COMMON_CLKDEV
 568         select ARCH_HAS_BARRIERS if CACHE_L2X0
 569         select ARCH_HAS_CPUFREQ
 570         help
 571           This enables support for NVIDIA Tegra based systems (Tegra APX,
 572           Tegra 6xx and Tegra 2 series).
 573
 574 config ARCH_PNX4008
 575         bool "Philips Nexperia PNX4008 Mobile"
 576         select CPU_ARM926T
 577         select COMMON_CLKDEV
 578         select ARCH_USES_GETTIMEOFFSET
 579         help
 580           This enables support for Philips PNX4008 mobile platform.
 581
 582 config ARCH_PXA
 583         bool "PXA2xx/PXA3xx-based"
 584         depends on MMU
 585         select ARCH_MTD_XIP
 586         select ARCH_HAS_CPUFREQ
 587         select COMMON_CLKDEV
 588         select ARCH_REQUIRE_GPIOLIB
 589         select GENERIC_CLOCKEVENTS
 590         select TICK_ONESHOT
 591         select PLAT_PXA
 592         select SPARSE_IRQ
 593         help
 594           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 595
 596 config ARCH_MSM
 597         bool "Qualcomm MSM"
 598         select HAVE_CLK
 599         select GENERIC_CLOCKEVENTS
 600         select ARCH_REQUIRE_GPIOLIB
 601         help
 602           Support for Qualcomm MSM/QSD based systems.  This runs on the
 603           apps processor of the MSM/QSD and depends on a shared memory
 604           interface to the modem processor which runs the baseband
 605           stack and controls some vital subsystems
 606           (clock and power control, etc).
 607
 608 config ARCH_SHMOBILE
 609         bool "Renesas SH-Mobile"
 610         help
 611           Support for Renesas's SH-Mobile ARM platforms
 612
 613 config ARCH_RPC
 614         bool "RiscPC"
 615         select ARCH_ACORN
 616         select FIQ
 617         select TIMER_ACORN
 618         select ARCH_MAY_HAVE_PC_FDC
 619         select HAVE_PATA_PLATFORM
 620         select ISA_DMA_API
 621         select NO_IOPORT
 622         select ARCH_SPARSEMEM_ENABLE
 623         select ARCH_USES_GETTIMEOFFSET
 624         help
 625           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 626           CD-ROM interface, serial and parallel port, and the floppy drive.
 627
 628 config ARCH_SA1100
 629         bool "SA1100-based"
 630         select CPU_SA1100
 631         select ISA
 632         select ARCH_SPARSEMEM_ENABLE
 633         select ARCH_MTD_XIP
 634         select ARCH_HAS_CPUFREQ
 635         select CPU_FREQ
 636         select GENERIC_CLOCKEVENTS
 637         select HAVE_CLK
 638         select TICK_ONESHOT
 639         select ARCH_REQUIRE_GPIOLIB
 640         help
 641           Support for StrongARM 11x0 based boards.
 642
 643 config ARCH_S3C2410
 644         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
 645         select GENERIC_GPIO
 646         select ARCH_HAS_CPUFREQ
 647         select HAVE_CLK
 648         select ARCH_USES_GETTIMEOFFSET
 649         select HAVE_S3C2410_I2C
 650         help
 651           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 652           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 653           the Samsung SMDK2410 development board (and derivatives).
 654
 655           Note, the S3C2416 and the S3C2450 are so close that they even share
 656           the same SoC ID code. This means that there is no seperate machine
 657           directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
 658
 659 config ARCH_S3C64XX
 660         bool "Samsung S3C64XX"
 661         select PLAT_SAMSUNG
 662         select CPU_V6
 663         select ARM_VIC
 664         select HAVE_CLK
 665         select NO_IOPORT
 666         select ARCH_USES_GETTIMEOFFSET
 667         select ARCH_HAS_CPUFREQ
 668         select ARCH_REQUIRE_GPIOLIB
 669         select SAMSUNG_CLKSRC
 670         select SAMSUNG_IRQ_VIC_TIMER
 671         select SAMSUNG_IRQ_UART
 672         select S3C_GPIO_TRACK
 673         select S3C_GPIO_PULL_UPDOWN
 674         select S3C_GPIO_CFG_S3C24XX
 675         select S3C_GPIO_CFG_S3C64XX
 676         select S3C_DEV_NAND
 677         select USB_ARCH_HAS_OHCI
 678         select SAMSUNG_GPIOLIB_4BIT
 679         select HAVE_S3C2410_I2C
 680         select HAVE_S3C2410_WATCHDOG
 681         help
 682           Samsung S3C64XX series based systems
 683
 684 config ARCH_S5P64X0
 685         bool "Samsung S5P6440 S5P6450"
 686         select CPU_V6
 687         select GENERIC_GPIO
 688         select HAVE_CLK
 689         select HAVE_S3C2410_WATCHDOG
 690         select ARCH_USES_GETTIMEOFFSET
 691         select HAVE_S3C2410_I2C
 692         select HAVE_S3C_RTC
 693         help
 694           Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
 695           SMDK6450.
 696
 697 config ARCH_S5P6442
 698         bool "Samsung S5P6442"
 699         select CPU_V6
 700         select GENERIC_GPIO
 701         select HAVE_CLK
 702         select ARCH_USES_GETTIMEOFFSET
 703         select HAVE_S3C2410_WATCHDOG
 704         help
 705           Samsung S5P6442 CPU based systems
 706
 707 config ARCH_S5PC100
 708         bool "Samsung S5PC100"
 709         select GENERIC_GPIO
 710         select HAVE_CLK
 711         select CPU_V7
 712         select ARM_L1_CACHE_SHIFT_6
 713         select ARCH_USES_GETTIMEOFFSET
 714         select HAVE_S3C2410_I2C
 715         select HAVE_S3C_RTC
 716         select HAVE_S3C2410_WATCHDOG
 717         help
 718           Samsung S5PC100 series based systems
 719
 720 config ARCH_S5PV210
 721         bool "Samsung S5PV210/S5PC110"
 722         select CPU_V7
 723         select ARCH_SPARSEMEM_ENABLE
 724         select GENERIC_GPIO
 725         select HAVE_CLK
 726         select ARM_L1_CACHE_SHIFT_6
 727         select ARCH_HAS_CPUFREQ
 728         select ARCH_USES_GETTIMEOFFSET
 729         select HAVE_S3C2410_I2C
 730         select HAVE_S3C_RTC
 731         select HAVE_S3C2410_WATCHDOG
 732         help
 733           Samsung S5PV210/S5PC110 series based systems
 734
 735 config ARCH_S5PV310
 736         bool "Samsung S5PV310/S5PC210"
 737         select CPU_V7
 738         select ARCH_SPARSEMEM_ENABLE
 739         select GENERIC_GPIO
 740         select HAVE_CLK
 741         select GENERIC_CLOCKEVENTS
 742         select HAVE_S3C_RTC
 743         select HAVE_S3C2410_I2C
 744         select HAVE_S3C2410_WATCHDOG
 745         help
 746           Samsung S5PV310 series based systems
 747
 748 config ARCH_SHARK
 749         bool "Shark"
 750         select CPU_SA110
 751         select ISA
 752         select ISA_DMA
 753         select ZONE_DMA
 754         select PCI
 755         select ARCH_USES_GETTIMEOFFSET
 756         help
 757           Support for the StrongARM based Digital DNARD machine, also known
 758           as "Shark" (<http://www.shark-linux.de/shark.html>).
 759
 760 config ARCH_TCC_926
 761         bool "Telechips TCC ARM926-based systems"
 762         select CPU_ARM926T
 763         select HAVE_CLK
 764         select COMMON_CLKDEV
 765         select GENERIC_CLOCKEVENTS
 766         help
 767           Support for Telechips TCC ARM926-based systems.
 768
 769 config ARCH_LH7A40X
 770         bool "Sharp LH7A40X"
 771         select CPU_ARM922T
 772         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 773         select ARCH_USES_GETTIMEOFFSET
 774         help
 775           Say Y here for systems based on one of the Sharp LH7A40X
 776           System on a Chip processors.  These CPUs include an ARM922T
 777           core with a wide array of integrated devices for
 778           hand-held and low-power applications.
 779
 780 config ARCH_U300
 781         bool "ST-Ericsson U300 Series"
 782         depends on MMU
 783         select CPU_ARM926T
 784         select HAVE_TCM
 785         select ARM_AMBA
 786         select ARM_VIC
 787         select GENERIC_CLOCKEVENTS
 788         select COMMON_CLKDEV
 789         select GENERIC_GPIO
 790         help
 791           Support for ST-Ericsson U300 series mobile platforms.
 792
 793 config ARCH_U8500
 794         bool "ST-Ericsson U8500 Series"
 795         select CPU_V7
 796         select ARM_AMBA
 797         select GENERIC_CLOCKEVENTS
 798         select COMMON_CLKDEV
 799         select ARCH_REQUIRE_GPIOLIB
 800         help
 801           Support for ST-Ericsson's Ux500 architecture
 802
 803 config ARCH_NOMADIK
 804         bool "STMicroelectronics Nomadik"
 805         select ARM_AMBA
 806         select ARM_VIC
 807         select CPU_ARM926T
 808         select COMMON_CLKDEV
 809         select GENERIC_CLOCKEVENTS
 810         select ARCH_REQUIRE_GPIOLIB
 811         help
 812           Support for the Nomadik platform by ST-Ericsson
 813
 814 config ARCH_DAVINCI
 815         bool "TI DaVinci"
 816         select GENERIC_CLOCKEVENTS
 817         select ARCH_REQUIRE_GPIOLIB
 818         select ZONE_DMA
 819         select HAVE_IDE
 820         select COMMON_CLKDEV
 821         select GENERIC_ALLOCATOR
 822         select ARCH_HAS_HOLES_MEMORYMODEL
 823         help
 824           Support for TI's DaVinci platform.
 825
 826 config ARCH_OMAP
 827         bool "TI OMAP"
 828         select HAVE_CLK
 829         select ARCH_REQUIRE_GPIOLIB
 830         select ARCH_HAS_CPUFREQ
 831         select GENERIC_CLOCKEVENTS
 832         select ARCH_HAS_HOLES_MEMORYMODEL
 833         help
 834           Support for TI's OMAP platform (OMAP1/2/3/4).
 835
 836 config PLAT_SPEAR
 837         bool "ST SPEAr"
 838         select ARM_AMBA
 839         select ARCH_REQUIRE_GPIOLIB
 840         select COMMON_CLKDEV
 841         select GENERIC_CLOCKEVENTS
 842         select HAVE_CLK
 843         help
 844           Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
 845
 846 endchoice
 847
 848 #
 849 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 850 # Kconfigs may be included either alphabetically (according to the
 851 # plat- suffix) or along side the corresponding mach-* source.
 852 #
 853 source "arch/arm/mach-aaec2000/Kconfig"
 854
 855 source "arch/arm/mach-at91/Kconfig"
 856
 857 source "arch/arm/mach-bcmring/Kconfig"
 858
 859 source "arch/arm/mach-clps711x/Kconfig"
 860
 861 source "arch/arm/mach-cns3xxx/Kconfig"
 862
 863 source "arch/arm/mach-davinci/Kconfig"
 864
 865 source "arch/arm/mach-dove/Kconfig"
 866
 867 source "arch/arm/mach-ep93xx/Kconfig"
 868
 869 source "arch/arm/mach-footbridge/Kconfig"
 870
 871 source "arch/arm/mach-gemini/Kconfig"
 872
 873 source "arch/arm/mach-h720x/Kconfig"
 874
 875 source "arch/arm/mach-integrator/Kconfig"
 876
 877 source "arch/arm/mach-iop32x/Kconfig"
 878
 879 source "arch/arm/mach-iop33x/Kconfig"
 880
 881 source "arch/arm/mach-iop13xx/Kconfig"
 882
 883 source "arch/arm/mach-ixp4xx/Kconfig"
 884
 885 source "arch/arm/mach-ixp2000/Kconfig"
 886
 887 source "arch/arm/mach-ixp23xx/Kconfig"
 888
 889 source "arch/arm/mach-kirkwood/Kconfig"
 890
 891 source "arch/arm/mach-ks8695/Kconfig"
 892
 893 source "arch/arm/mach-lh7a40x/Kconfig"
 894
 895 source "arch/arm/mach-loki/Kconfig"
 896
 897 source "arch/arm/mach-lpc32xx/Kconfig"
 898
 899 source "arch/arm/mach-msm/Kconfig"
 900
 901 source "arch/arm/mach-mv78xx0/Kconfig"
 902
 903 source "arch/arm/plat-mxc/Kconfig"
 904
 905 source "arch/arm/mach-netx/Kconfig"
 906
 907 source "arch/arm/mach-nomadik/Kconfig"
 908 source "arch/arm/plat-nomadik/Kconfig"
 909
 910 source "arch/arm/mach-ns9xxx/Kconfig"
 911
 912 source "arch/arm/mach-nuc93x/Kconfig"
 913
 914 source "arch/arm/plat-omap/Kconfig"
 915
 916 source "arch/arm/mach-omap1/Kconfig"
 917
 918 source "arch/arm/mach-omap2/Kconfig"
 919
 920 source "arch/arm/mach-orion5x/Kconfig"
 921
 922 source "arch/arm/mach-pxa/Kconfig"
 923 source "arch/arm/plat-pxa/Kconfig"
 924
 925 source "arch/arm/mach-mmp/Kconfig"
 926
 927 source "arch/arm/mach-realview/Kconfig"
 928
 929 source "arch/arm/mach-sa1100/Kconfig"
 930
 931 source "arch/arm/plat-samsung/Kconfig"
 932 source "arch/arm/plat-s3c24xx/Kconfig"
 933 source "arch/arm/plat-s5p/Kconfig"
 934
 935 source "arch/arm/plat-spear/Kconfig"
 936
 937 source "arch/arm/plat-tcc/Kconfig"
 938
 939 if ARCH_S3C2410
 940 source "arch/arm/mach-s3c2400/Kconfig"
 941 source "arch/arm/mach-s3c2410/Kconfig"
 942 source "arch/arm/mach-s3c2412/Kconfig"
 943 source "arch/arm/mach-s3c2416/Kconfig"
 944 source "arch/arm/mach-s3c2440/Kconfig"
 945 source "arch/arm/mach-s3c2443/Kconfig"
 946 endif
 947
 948 if ARCH_S3C64XX
 949 source "arch/arm/mach-s3c64xx/Kconfig"
 950 endif
 951
 952 source "arch/arm/mach-s5p64x0/Kconfig"
 953
 954 source "arch/arm/mach-s5p6442/Kconfig"
 955
 956 source "arch/arm/mach-s5pc100/Kconfig"
 957
 958 source "arch/arm/mach-s5pv210/Kconfig"
 959
 960 source "arch/arm/mach-s5pv310/Kconfig"
 961
 962 source "arch/arm/mach-shmobile/Kconfig"
 963
 964 source "arch/arm/plat-stmp3xxx/Kconfig"
 965
 966 source "arch/arm/mach-tegra/Kconfig"
 967
 968 source "arch/arm/mach-u300/Kconfig"
 969
 970 source "arch/arm/mach-ux500/Kconfig"
 971
 972 source "arch/arm/mach-versatile/Kconfig"
 973
 974 source "arch/arm/mach-vexpress/Kconfig"
 975
 976 source "arch/arm/mach-w90x900/Kconfig"
 977
 978 # Definitions to make life easier
 979 config ARCH_ACORN
 980         bool
 981
 982 config PLAT_IOP
 983         bool
 984         select GENERIC_CLOCKEVENTS
 985
 986 config PLAT_ORION
 987         bool
 988
 989 config PLAT_PXA
 990         bool
 991
 992 config PLAT_VERSATILE
 993         bool
 994
 995 config ARM_TIMER_SP804
 996         bool
 997
 998 source arch/arm/mm/Kconfig
 999
1000 config IWMMXT
1001         bool "Enable iWMMXt support"
1002         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
1003         default y if PXA27x || PXA3xx || ARCH_MMP
1004         help
1005           Enable support for iWMMXt context switching at run time if
1006           running on a CPU that supports it.
1007
1008 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
1009 config XSCALE_PMU
1010         bool
1011         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
1012         default y
1013
1014 config CPU_HAS_PMU
1015         depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
1016                    (!ARCH_OMAP3 || OMAP3_EMU)
1017         default y
1018         bool
1019
1020 if !MMU
1021 source "arch/arm/Kconfig-nommu"
1022 endif
1023
1024 config ARM_ERRATA_411920
1025         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1026         depends on CPU_V6
1027         help
1028           Invalidation of the Instruction Cache operation can
1029           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1030           It does not affect the MPCore. This option enables the ARM Ltd.
1031           recommended workaround.
1032
1033 config ARM_ERRATA_430973
1034         bool "ARM errata: Stale prediction on replaced interworking branch"
1035         depends on CPU_V7
1036         help
1037           This option enables the workaround for the 430973 Cortex-A8
1038           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1039           interworking branch is replaced with another code sequence at the
1040           same virtual address, whether due to self-modifying code or virtual
1041           to physical address re-mapping, Cortex-A8 does not recover from the
1042           stale interworking branch prediction. This results in Cortex-A8
1043           executing the new code sequence in the incorrect ARM or Thumb state.
1044           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1045           and also flushes the branch target cache at every context switch.
1046           Note that setting specific bits in the ACTLR register may not be
1047           available in non-secure mode.
1048
1049 config ARM_ERRATA_458693
1050         bool "ARM errata: Processor deadlock when a false hazard is created"
1051         depends on CPU_V7
1052         help
1053           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1054           erratum. For very specific sequences of memory operations, it is
1055           possible for a hazard condition intended for a cache line to instead
1056           be incorrectly associated with a different cache line. This false
1057           hazard might then cause a processor deadlock. The workaround enables
1058           the L1 caching of the NEON accesses and disables the PLD instruction
1059           in the ACTLR register. Note that setting specific bits in the ACTLR
1060           register may not be available in non-secure mode.
1061
1062 config ARM_ERRATA_460075
1063         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1064         depends on CPU_V7
1065         help
1066           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1067           erratum. Any asynchronous access to the L2 cache may encounter a
1068           situation in which recent store transactions to the L2 cache are lost
1069           and overwritten with stale memory contents from external memory. The
1070           workaround disables the write-allocate mode for the L2 cache via the
1071           ACTLR register. Note that setting specific bits in the ACTLR register
1072           may not be available in non-secure mode.
1073
1074 config ARM_ERRATA_742230
1075         bool "ARM errata: DMB operation may be faulty"
1076         depends on CPU_V7 && SMP
1077         help
1078           This option enables the workaround for the 742230 Cortex-A9
1079           (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1080           between two write operations may not ensure the correct visibility
1081           ordering of the two writes. This workaround sets a specific bit in
1082           the diagnostic register of the Cortex-A9 which causes the DMB
1083           instruction to behave as a DSB, ensuring the correct behaviour of
1084           the two writes.
1085
1086 config ARM_ERRATA_742231
1087         bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1088         depends on CPU_V7 && SMP
1089         help
1090           This option enables the workaround for the 742231 Cortex-A9
1091           (r2p0..r2p2) erratum. Under certain conditions, specific to the
1092           Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1093           accessing some data located in the same cache line, may get corrupted
1094           data due to bad handling of the address hazard when the line gets
1095           replaced from one of the CPUs at the same time as another CPU is
1096           accessing it. This workaround sets specific bits in the diagnostic
1097           register of the Cortex-A9 which reduces the linefill issuing
1098           capabilities of the processor.
1099
1100 config PL310_ERRATA_588369
1101         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1102         depends on CACHE_L2X0 && ARCH_OMAP4
1103         help
1104            The PL310 L2 cache controller implements three types of Clean &
1105            Invalidate maintenance operations: by Physical Address
1106            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1107            They are architecturally defined to behave as the execution of a
1108            clean operation followed immediately by an invalidate operation,
1109            both performing to the same memory location. This functionality
1110            is not correctly implemented in PL310 as clean lines are not
1111            invalidated as a result of these operations. Note that this errata
1112            uses Texas Instrument's secure monitor api.
1113
1114 config ARM_ERRATA_720789
1115         bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1116         depends on CPU_V7 && SMP
1117         help
1118           This option enables the workaround for the 720789 Cortex-A9 (prior to
1119           r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1120           broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1121           As a consequence of this erratum, some TLB entries which should be
1122           invalidated are not, resulting in an incoherency in the system page
1123           tables. The workaround changes the TLB flushing routines to invalidate
1124           entries regardless of the ASID.
1125
1126 config ARM_ERRATA_743622
1127         bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1128         depends on CPU_V7
1129         help
1130           This option enables the workaround for the 743622 Cortex-A9
1131           (r2p0..r2p2) erratum. Under very rare conditions, a faulty
1132           optimisation in the Cortex-A9 Store Buffer may lead to data
1133           corruption. This workaround sets a specific bit in the diagnostic
1134           register of the Cortex-A9 which disables the Store Buffer
1135           optimisation, preventing the defect from occurring. This has no
1136           visible impact on the overall performance or power consumption of the
1137           processor.
1138
1139 endmenu
1140
1141 source "arch/arm/common/Kconfig"
1142
1143 menu "Bus support"
1144
1145 config ARM_AMBA
1146         bool
1147
1148 config ISA
1149         bool
1150         help
1151           Find out whether you have ISA slots on your motherboard.  ISA is the
1152           name of a bus system, i.e. the way the CPU talks to the other stuff
1153           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1154           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1155           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1156
1157 # Select ISA DMA controller support
1158 config ISA_DMA
1159         bool
1160         select ISA_DMA_API
1161
1162 # Select ISA DMA interface
1163 config ISA_DMA_API
1164         bool
1165
1166 config PCI
1167         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE || ARCH_CNS3XXX || SA1100_NANOENGINE
1168         help
1169           Find out whether you have a PCI motherboard. PCI is the name of a
1170           bus system, i.e. the way the CPU talks to the other stuff inside
1171           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1172           VESA. If you have PCI, say Y, otherwise N.
1173
1174 config PCI_DOMAINS
1175         bool
1176         depends on PCI
1177
1178 config PCI_NANOENGINE
1179         bool "BSE nanoEngine PCI support"
1180         depends on SA1100_NANOENGINE
1181         help
1182           Enable PCI on the BSE nanoEngine board.
1183
1184 config PCI_SYSCALL
1185         def_bool PCI
1186
1187 # Select the host bridge type
1188 config PCI_HOST_VIA82C505
1189         bool
1190         depends on PCI && ARCH_SHARK
1191         default y
1192
1193 config PCI_HOST_ITE8152
1194         bool
1195         depends on PCI && MACH_ARMCORE
1196         default y
1197         select DMABOUNCE
1198
1199 source "drivers/pci/Kconfig"
1200
1201 source "drivers/pcmcia/Kconfig"
1202
1203 endmenu
1204
1205 menu "Kernel Features"
1206
1207 source "kernel/time/Kconfig"
1208
1209 config SMP
1210         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1211         depends on EXPERIMENTAL
1212         depends on GENERIC_CLOCKEVENTS
1213         depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
1214                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
1215                  ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4
1216         select USE_GENERIC_SMP_HELPERS
1217         select HAVE_ARM_SCU
1218         help
1219           This enables support for systems with more than one CPU. If you have
1220           a system with only one CPU, like most personal computers, say N. If
1221           you have a system with more than one CPU, say Y.
1222
1223           If you say N here, the kernel will run on single and multiprocessor
1224           machines, but will use only one CPU of a multiprocessor machine. If
1225           you say Y here, the kernel will run on many, but not all, single
1226           processor machines. On a single processor machine, the kernel will
1227           run faster if you say N here.
1228
1229           See also <file:Documentation/i386/IO-APIC.txt>,
1230           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1231           <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1232
1233           If you don't know what to do here, say N.
1234
1235 config SMP_ON_UP
1236         bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1237         depends on EXPERIMENTAL
1238         depends on SMP && !XIP && !THUMB2_KERNEL
1239         default y
1240         help
1241           SMP kernels contain instructions which fail on non-SMP processors.
1242           Enabling this option allows the kernel to modify itself to make
1243           these instructions safe.  Disabling it allows about 1K of space
1244           savings.
1245
1246           If you don't know what to do here, say Y.
1247
1248 config HAVE_ARM_SCU
1249         bool
1250         depends on SMP
1251         help
1252           This option enables support for the ARM system coherency unit
1253
1254 config HAVE_ARM_TWD
1255         bool
1256         depends on SMP
1257         help
1258           This options enables support for the ARM timer and watchdog unit
1259
1260 choice
1261         prompt "Memory split"
1262         default VMSPLIT_3G
1263         help
1264           Select the desired split between kernel and user memory.
1265
1266           If you are not absolutely sure what you are doing, leave this
1267           option alone!
1268
1269         config VMSPLIT_3G
1270                 bool "3G/1G user/kernel split"
1271         config VMSPLIT_2G
1272                 bool "2G/2G user/kernel split"
1273         config VMSPLIT_1G
1274                 bool "1G/3G user/kernel split"
1275 endchoice
1276
1277 config PAGE_OFFSET
1278         hex
1279         default 0x40000000 if VMSPLIT_1G
1280         default 0x80000000 if VMSPLIT_2G
1281         default 0xC0000000
1282
1283 config NR_CPUS
1284         int "Maximum number of CPUs (2-32)"
1285         range 2 32
1286         depends on SMP
1287         default "4"
1288
1289 config HOTPLUG_CPU
1290         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1291         depends on SMP && HOTPLUG && EXPERIMENTAL
1292         help
1293           Say Y here to experiment with turning CPUs off and on.  CPUs
1294           can be controlled through /sys/devices/system/cpu.
1295
1296 config LOCAL_TIMERS
1297         bool "Use local timer interrupts"
1298         depends on SMP
1299         default y
1300         select HAVE_ARM_TWD
1301         help
1302           Enable support for local timers on SMP platforms, rather then the
1303           legacy IPI broadcast method.  Local timers allows the system
1304           accounting to be spread across the timer interval, preventing a
1305           "thundering herd" at every timer tick.
1306
1307 source kernel/Kconfig.preempt
1308
1309 config HZ
1310         int
1311         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
1312                 ARCH_S5P6442 || ARCH_S5PV210 || ARCH_S5PV310
1313         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1314         default AT91_TIMER_HZ if ARCH_AT91
1315         default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1316         default 100
1317
1318 config THUMB2_KERNEL
1319         bool "Compile the kernel in Thumb-2 mode"
1320         depends on CPU_V7 && EXPERIMENTAL
1321         select AEABI
1322         select ARM_ASM_UNIFIED
1323         help
1324           By enabling this option, the kernel will be compiled in
1325           Thumb-2 mode. A compiler/assembler that understand the unified
1326           ARM-Thumb syntax is needed.
1327
1328           If unsure, say N.
1329
1330 config ARM_ASM_UNIFIED
1331         bool
1332
1333 config AEABI
1334         bool "Use the ARM EABI to compile the kernel"
1335         help
1336           This option allows for the kernel to be compiled using the latest
1337           ARM ABI (aka EABI).  This is only useful if you are using a user
1338           space environment that is also compiled with EABI.
1339
1340           Since there are major incompatibilities between the legacy ABI and
1341           EABI, especially with regard to structure member alignment, this
1342           option also changes the kernel syscall calling convention to
1343           disambiguate both ABIs and allow for backward compatibility support
1344           (selected with CONFIG_OABI_COMPAT).
1345
1346           To use this you need GCC version 4.0.0 or later.
1347
1348 config OABI_COMPAT
1349         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1350         depends on AEABI && EXPERIMENTAL
1351         default y
1352         help
1353           This option preserves the old syscall interface along with the
1354           new (ARM EABI) one. It also provides a compatibility layer to
1355           intercept syscalls that have structure arguments which layout
1356           in memory differs between the legacy ABI and the new ARM EABI
1357           (only for non "thumb" binaries). This option adds a tiny
1358           overhead to all syscalls and produces a slightly larger kernel.
1359           If you know you'll be using only pure EABI user space then you
1360           can say N here. If this option is not selected and you attempt
1361           to execute a legacy ABI binary then the result will be
1362           UNPREDICTABLE (in fact it can be predicted that it won't work
1363           at all). If in doubt say Y.
1364
1365 config ARCH_HAS_HOLES_MEMORYMODEL
1366         bool
1367
1368 config ARCH_SPARSEMEM_ENABLE
1369         bool
1370
1371 config ARCH_SPARSEMEM_DEFAULT
1372         def_bool ARCH_SPARSEMEM_ENABLE
1373
1374 config ARCH_SELECT_MEMORY_MODEL
1375         def_bool ARCH_SPARSEMEM_ENABLE
1376
1377 config HIGHMEM
1378         bool "High Memory Support (EXPERIMENTAL)"
1379         depends on MMU && EXPERIMENTAL
1380         help
1381           The address space of ARM processors is only 4 Gigabytes large
1382           and it has to accommodate user address space, kernel address
1383           space as well as some memory mapped IO. That means that, if you
1384           have a large amount of physical memory and/or IO, not all of the
1385           memory can be "permanently mapped" by the kernel. The physical
1386           memory that is not permanently mapped is called "high memory".
1387
1388           Depending on the selected kernel/user memory split, minimum
1389           vmalloc space and actual amount of RAM, you may not need this
1390           option which should result in a slightly faster kernel.
1391
1392           If unsure, say n.
1393
1394 config HIGHPTE
1395         bool "Allocate 2nd-level pagetables from highmem"
1396         depends on HIGHMEM
1397         depends on !OUTER_CACHE
1398
1399 config HW_PERF_EVENTS
1400         bool "Enable hardware performance counter support for perf events"
1401         depends on PERF_EVENTS && CPU_HAS_PMU
1402         default y
1403         help
1404           Enable hardware performance counter support for perf events. If
1405           disabled, perf events will use software events only.
1406
1407 config SPARSE_IRQ
1408         def_bool n
1409         help
1410           This enables support for sparse irqs. This is useful in general
1411           as most CPUs have a fairly sparse array of IRQ vectors, which
1412           the irq_desc then maps directly on to. Systems with a high
1413           number of off-chip IRQs will want to treat this as
1414           experimental until they have been independently verified.
1415
1416 source "mm/Kconfig"
1417
1418 config FORCE_MAX_ZONEORDER
1419         int "Maximum zone order" if ARCH_SHMOBILE
1420         range 11 64 if ARCH_SHMOBILE
1421         default "9" if SA1111
1422         default "11"
1423         help
1424           The kernel memory allocator divides physically contiguous memory
1425           blocks into "zones", where each zone is a power of two number of
1426           pages.  This option selects the largest power of two that the kernel
1427           keeps in the memory allocator.  If you need to allocate very large
1428           blocks of physically contiguous memory, then you may need to
1429           increase this value.
1430
1431           This config option is actually maximum order plus one. For example,
1432           a value of 11 means that the largest free memory block is 2^10 pages.
1433
1434 config LEDS
1435         bool "Timer and CPU usage LEDs"
1436         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1437                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1438                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1439                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1440                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1441                    ARCH_AT91 || ARCH_DAVINCI || \
1442                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1443         help
1444           If you say Y here, the LEDs on your machine will be used
1445           to provide useful information about your current system status.
1446
1447           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1448           be able to select which LEDs are active using the options below. If
1449           you are compiling a kernel for the EBSA-110 or the LART however, the
1450           red LED will simply flash regularly to indicate that the system is
1451           still functional. It is safe to say Y here if you have a CATS
1452           system, but the driver will do nothing.
1453
1454 config LEDS_TIMER
1455         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1456                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1457                             || MACH_OMAP_PERSEUS2
1458         depends on LEDS
1459         depends on !GENERIC_CLOCKEVENTS
1460         default y if ARCH_EBSA110
1461         help
1462           If you say Y here, one of the system LEDs (the green one on the
1463           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1464           will flash regularly to indicate that the system is still
1465           operational. This is mainly useful to kernel hackers who are
1466           debugging unstable kernels.
1467
1468           The LART uses the same LED for both Timer LED and CPU usage LED
1469           functions. You may choose to use both, but the Timer LED function
1470           will overrule the CPU usage LED.
1471
1472 config LEDS_CPU
1473         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1474                         !ARCH_OMAP) \
1475                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1476                         || MACH_OMAP_PERSEUS2
1477         depends on LEDS
1478         help
1479           If you say Y here, the red LED will be used to give a good real
1480           time indication of CPU usage, by lighting whenever the idle task
1481           is not currently executing.
1482
1483           The LART uses the same LED for both Timer LED and CPU usage LED
1484           functions. You may choose to use both, but the Timer LED function
1485           will overrule the CPU usage LED.
1486
1487 config ALIGNMENT_TRAP
1488         bool
1489         depends on CPU_CP15_MMU
1490         default y if !ARCH_EBSA110
1491         select HAVE_PROC_CPU if PROC_FS
1492         help
1493           ARM processors cannot fetch/store information which is not
1494           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1495           address divisible by 4. On 32-bit ARM processors, these non-aligned
1496           fetch/store instructions will be emulated in software if you say
1497           here, which has a severe performance impact. This is necessary for
1498           correct operation of some network protocols. With an IP-only
1499           configuration it is safe to say N, otherwise say Y.
1500
1501 config UACCESS_WITH_MEMCPY
1502         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1503         depends on MMU && EXPERIMENTAL
1504         default y if CPU_FEROCEON
1505         help
1506           Implement faster copy_to_user and clear_user methods for CPU
1507           cores where a 8-word STM instruction give significantly higher
1508           memory write throughput than a sequence of individual 32bit stores.
1509
1510           A possible side effect is a slight increase in scheduling latency
1511           between threads sharing the same address space if they invoke
1512           such copy operations with large buffers.
1513
1514           However, if the CPU data cache is using a write-allocate mode,
1515           this option is unlikely to provide any performance gain.
1516
1517 config SECCOMP
1518         bool
1519         prompt "Enable seccomp to safely compute untrusted bytecode"
1520         ---help---
1521           This kernel feature is useful for number crunching applications
1522           that may need to compute untrusted bytecode during their
1523           execution. By using pipes or other transports made available to
1524           the process as file descriptors supporting the read/write
1525           syscalls, it's possible to isolate those applications in
1526           their own address space using seccomp. Once seccomp is
1527           enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1528           and the task is only allowed to execute a few safe syscalls
1529           defined by each seccomp mode.
1530
1531 config CC_STACKPROTECTOR
1532         bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1533         help
1534           This option turns on the -fstack-protector GCC feature. This
1535           feature puts, at the beginning of functions, a canary value on
1536           the stack just before the return address, and validates
1537           the value just before actually returning.  Stack based buffer
1538           overflows (that need to overwrite this return address) now also
1539           overwrite the canary, which gets detected and the attack is then
1540           neutralized via a kernel panic.
1541           This feature requires gcc version 4.2 or above.
1542
1543 config DEPRECATED_PARAM_STRUCT
1544         bool "Provide old way to pass kernel parameters"
1545         help
1546           This was deprecated in 2001 and announced to live on for 5 years.
1547           Some old boot loaders still use this way.
1548
1549 endmenu
1550
1551 menu "Boot options"
1552
1553 # Compressed boot loader in ROM.  Yes, we really want to ask about
1554 # TEXT and BSS so we preserve their values in the config files.
1555 config ZBOOT_ROM_TEXT
1556         hex "Compressed ROM boot loader base address"
1557         default "0"
1558         help
1559           The physical address at which the ROM-able zImage is to be
1560           placed in the target.  Platforms which normally make use of
1561           ROM-able zImage formats normally set this to a suitable
1562           value in their defconfig file.
1563
1564           If ZBOOT_ROM is not enabled, this has no effect.
1565
1566 config ZBOOT_ROM_BSS
1567         hex "Compressed ROM boot loader BSS address"
1568         default "0"
1569         help
1570           The base address of an area of read/write memory in the target
1571           for the ROM-able zImage which must be available while the
1572           decompressor is running. It must be large enough to hold the
1573           entire decompressed kernel plus an additional 128 KiB.
1574           Platforms which normally make use of ROM-able zImage formats
1575           normally set this to a suitable value in their defconfig file.
1576
1577           If ZBOOT_ROM is not enabled, this has no effect.
1578
1579 config ZBOOT_ROM
1580         bool "Compressed boot loader in ROM/flash"
1581         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1582         help
1583           Say Y here if you intend to execute your compressed kernel image
1584           (zImage) directly from ROM or flash.  If unsure, say N.
1585
1586 config CMDLINE
1587         string "Default kernel command string"
1588         default ""
1589         help
1590           On some architectures (EBSA110 and CATS), there is currently no way
1591           for the boot loader to pass arguments to the kernel. For these
1592           architectures, you should supply some command-line options at build
1593           time by entering them here. As a minimum, you should specify the
1594           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1595
1596 config CMDLINE_FORCE
1597         bool "Always use the default kernel command string"
1598         depends on CMDLINE != ""
1599         help
1600           Always use the default kernel command string, even if the boot
1601           loader passes other arguments to the kernel.
1602           This is useful if you cannot or don't want to change the
1603           command-line options your boot loader passes to the kernel.
1604
1605           If unsure, say N.
1606
1607 config XIP_KERNEL
1608         bool "Kernel Execute-In-Place from ROM"
1609         depends on !ZBOOT_ROM
1610         help
1611           Execute-In-Place allows the kernel to run from non-volatile storage
1612           directly addressable by the CPU, such as NOR flash. This saves RAM
1613           space since the text section of the kernel is not loaded from flash
1614           to RAM.  Read-write sections, such as the data section and stack,
1615           are still copied to RAM.  The XIP kernel is not compressed since
1616           it has to run directly from flash, so it will take more space to
1617           store it.  The flash address used to link the kernel object files,
1618           and for storing it, is configuration dependent. Therefore, if you
1619           say Y here, you must know the proper physical address where to
1620           store the kernel image depending on your own flash memory usage.
1621
1622           Also note that the make target becomes "make xipImage" rather than
1623           "make zImage" or "make Image".  The final kernel binary to put in
1624           ROM memory will be arch/arm/boot/xipImage.
1625
1626           If unsure, say N.
1627
1628 config XIP_PHYS_ADDR
1629         hex "XIP Kernel Physical Location"
1630         depends on XIP_KERNEL
1631         default "0x00080000"
1632         help
1633           This is the physical address in your flash memory the kernel will
1634           be linked for and stored to.  This address is dependent on your
1635           own flash usage.
1636
1637 config KEXEC
1638         bool "Kexec system call (EXPERIMENTAL)"
1639         depends on EXPERIMENTAL
1640         help
1641           kexec is a system call that implements the ability to shutdown your
1642           current kernel, and to start another kernel.  It is like a reboot
1643           but it is independent of the system firmware.   And like a reboot
1644           you can start any kernel with it, not just Linux.
1645
1646           It is an ongoing process to be certain the hardware in a machine
1647           is properly shutdown, so do not be surprised if this code does not
1648           initially work for you.  It may help to enable device hotplugging
1649           support.
1650
1651 config ATAGS_PROC
1652         bool "Export atags in procfs"
1653         depends on KEXEC
1654         default y
1655         help
1656           Should the atags used to boot the kernel be exported in an "atags"
1657           file in procfs. Useful with kexec.
1658
1659 config AUTO_ZRELADDR
1660         bool "Auto calculation of the decompressed kernel image address"
1661         depends on !ZBOOT_ROM && !ARCH_U300
1662         help
1663           ZRELADDR is the physical address where the decompressed kernel
1664           image will be placed. If AUTO_ZRELADDR is selected, the address
1665           will be determined at run-time by masking the current IP with
1666           0xf8000000. This assumes the zImage being placed in the first 128MB
1667           from start of memory.
1668
1669 endmenu
1670
1671 menu "CPU Power Management"
1672
1673 if ARCH_HAS_CPUFREQ
1674
1675 source "drivers/cpufreq/Kconfig"
1676
1677 config CPU_FREQ_IMX
1678         tristate "CPUfreq driver for i.MX CPUs"
1679         depends on ARCH_MXC && CPU_FREQ
1680         help
1681           This enables the CPUfreq driver for i.MX CPUs.
1682
1683 config CPU_FREQ_SA1100
1684         bool
1685
1686 config CPU_FREQ_SA1110
1687         bool
1688
1689 config CPU_FREQ_INTEGRATOR
1690         tristate "CPUfreq driver for ARM Integrator CPUs"
1691         depends on ARCH_INTEGRATOR && CPU_FREQ
1692         default y
1693         help
1694           This enables the CPUfreq driver for ARM Integrator CPUs.
1695
1696           For details, take a look at <file:Documentation/cpu-freq>.
1697
1698           If in doubt, say Y.
1699
1700 config CPU_FREQ_PXA
1701         bool
1702         depends on CPU_FREQ && ARCH_PXA && PXA25x
1703         default y
1704         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1705
1706 config CPU_FREQ_S3C64XX
1707         bool "CPUfreq support for Samsung S3C64XX CPUs"
1708         depends on CPU_FREQ && CPU_S3C6410
1709
1710 config CPU_FREQ_S3C
1711         bool
1712         help
1713           Internal configuration node for common cpufreq on Samsung SoC
1714
1715 config CPU_FREQ_S3C24XX
1716         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1717         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1718         select CPU_FREQ_S3C
1719         help
1720           This enables the CPUfreq driver for the Samsung S3C24XX family
1721           of CPUs.
1722
1723           For details, take a look at <file:Documentation/cpu-freq>.
1724
1725           If in doubt, say N.
1726
1727 config CPU_FREQ_S3C24XX_PLL
1728         bool "Support CPUfreq changing of PLL frequency"
1729         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1730         help
1731           Compile in support for changing the PLL frequency from the
1732           S3C24XX series CPUfreq driver. The PLL takes time to settle
1733           after a frequency change, so by default it is not enabled.
1734
1735           This also means that the PLL tables for the selected CPU(s) will
1736           be built which may increase the size of the kernel image.
1737
1738 config CPU_FREQ_S3C24XX_DEBUG
1739         bool "Debug CPUfreq Samsung driver core"
1740         depends on CPU_FREQ_S3C24XX
1741         help
1742           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1743
1744 config CPU_FREQ_S3C24XX_IODEBUG
1745         bool "Debug CPUfreq Samsung driver IO timing"
1746         depends on CPU_FREQ_S3C24XX
1747         help
1748           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1749
1750 config CPU_FREQ_S3C24XX_DEBUGFS
1751         bool "Export debugfs for CPUFreq"
1752         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1753         help
1754           Export status information via debugfs.
1755
1756 endif
1757
1758 source "drivers/cpuidle/Kconfig"
1759
1760 endmenu
1761
1762 menu "Floating point emulation"
1763
1764 comment "At least one emulation must be selected"
1765
1766 config FPE_NWFPE
1767         bool "NWFPE math emulation"
1768         depends on !AEABI || OABI_COMPAT
1769         ---help---
1770           Say Y to include the NWFPE floating point emulator in the kernel.
1771           This is necessary to run most binaries. Linux does not currently
1772           support floating point hardware so you need to say Y here even if
1773           your machine has an FPA or floating point co-processor podule.
1774
1775           You may say N here if you are going to load the Acorn FPEmulator
1776           early in the bootup.
1777
1778 config FPE_NWFPE_XP
1779         bool "Support extended precision"
1780         depends on FPE_NWFPE
1781         help
1782           Say Y to include 80-bit support in the kernel floating-point
1783           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1784           Note that gcc does not generate 80-bit operations by default,
1785           so in most cases this option only enlarges the size of the
1786           floating point emulator without any good reason.
1787
1788           You almost surely want to say N here.
1789
1790 config FPE_FASTFPE
1791         bool "FastFPE math emulation (EXPERIMENTAL)"
1792         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1793         ---help---
1794           Say Y here to include the FAST floating point emulator in the kernel.
1795           This is an experimental much faster emulator which now also has full
1796           precision for the mantissa.  It does not support any exceptions.
1797           It is very simple, and approximately 3-6 times faster than NWFPE.
1798
1799           It should be sufficient for most programs.  It may be not suitable
1800           for scientific calculations, but you have to check this for yourself.
1801           If you do not feel you need a faster FP emulation you should better
1802           choose NWFPE.
1803
1804 config VFP
1805         bool "VFP-format floating point maths"
1806         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1807         help
1808           Say Y to include VFP support code in the kernel. This is needed
1809           if your hardware includes a VFP unit.
1810
1811           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1812           release notes and additional status information.
1813
1814           Say N if your target does not have VFP hardware.
1815
1816 config VFPv3
1817         bool
1818         depends on VFP
1819         default y if CPU_V7
1820
1821 config NEON
1822         bool "Advanced SIMD (NEON) Extension support"
1823         depends on VFPv3 && CPU_V7
1824         help
1825           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1826           Extension.
1827
1828 endmenu
1829
1830 menu "Userspace binary formats"
1831
1832 source "fs/Kconfig.binfmt"
1833
1834 config ARTHUR
1835         tristate "RISC OS personality"
1836         depends on !AEABI
1837         help
1838           Say Y here to include the kernel code necessary if you want to run
1839           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1840           experimental; if this sounds frightening, say N and sleep in peace.
1841           You can also say M here to compile this support as a module (which
1842           will be called arthur).
1843
1844 endmenu
1845
1846 menu "Power management options"
1847
1848 source "kernel/power/Kconfig"
1849
1850 config ARCH_SUSPEND_POSSIBLE
1851         def_bool y
1852
1853 endmenu
1854
1855 source "net/Kconfig"
1856
1857 source "drivers/Kconfig"
1858
1859 source "fs/Kconfig"
1860
1861 source "arch/arm/Kconfig.debug"
1862
1863 source "security/Kconfig"
1864
1865 source "crypto/Kconfig"
1866
1867 source "lib/Kconfig"