arch/arm/Kconfig

   1 config ARM
   2         bool
   3         default y
   4         select HAVE_AOUT
   5         select HAVE_DMA_API_DEBUG
   6         select HAVE_IDE
   7         select HAVE_MEMBLOCK
   8         select RTC_LIB
   9         select SYS_SUPPORTS_APM_EMULATION
  10         select GENERIC_ATOMIC64 if (!CPU_32v6K || !AEABI)
  11         select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  12         select HAVE_ARCH_KGDB
  13         select HAVE_KPROBES if (!XIP_KERNEL && !THUMB2_KERNEL)
  14         select HAVE_KRETPROBES if (HAVE_KPROBES)
  15         select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  16         select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  17         select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  18         select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  19         select HAVE_GENERIC_DMA_COHERENT
  20         select HAVE_KERNEL_GZIP
  21         select HAVE_KERNEL_LZO
  22         select HAVE_KERNEL_LZMA
  23         select HAVE_IRQ_WORK
  24         select HAVE_PERF_EVENTS
  25         select PERF_USE_VMALLOC
  26         select HAVE_REGS_AND_STACK_ACCESS_API
  27         select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V7))
  28         select HAVE_C_RECORDMCOUNT
  29         select HAVE_GENERIC_HARDIRQS
  30         select HAVE_SPARSE_IRQ
  31         help
  32           The ARM series is a line of low-power-consumption RISC chip designs
  33           licensed by ARM Ltd and targeted at embedded applications and
  34           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  35           manufactured, but legacy ARM-based PC hardware remains popular in
  36           Europe.  There is an ARM Linux project with a web page at
  37           <http://www.arm.linux.org.uk/>.
  38
  39 config HAVE_PWM
  40         bool
  41
  42 config MIGHT_HAVE_PCI
  43         bool
  44
  45 config SYS_SUPPORTS_APM_EMULATION
  46         bool
  47
  48 config HAVE_SCHED_CLOCK
  49         bool
  50
  51 config GENERIC_GPIO
  52         bool
  53
  54 config ARCH_USES_GETTIMEOFFSET
  55         bool
  56         default n
  57
  58 config GENERIC_CLOCKEVENTS
  59         bool
  60
  61 config GENERIC_CLOCKEVENTS_BROADCAST
  62         bool
  63         depends on GENERIC_CLOCKEVENTS
  64         default y if SMP
  65
  66 config HAVE_TCM
  67         bool
  68         select GENERIC_ALLOCATOR
  69
  70 config HAVE_PROC_CPU
  71         bool
  72
  73 config NO_IOPORT
  74         bool
  75
  76 config EISA
  77         bool
  78         ---help---
  79           The Extended Industry Standard Architecture (EISA) bus was
  80           developed as an open alternative to the IBM MicroChannel bus.
  81
  82           The EISA bus provided some of the features of the IBM MicroChannel
  83           bus while maintaining backward compatibility with cards made for
  84           the older ISA bus.  The EISA bus saw limited use between 1988 and
  85           1995 when it was made obsolete by the PCI bus.
  86
  87           Say Y here if you are building a kernel for an EISA-based machine.
  88
  89           Otherwise, say N.
  90
  91 config SBUS
  92         bool
  93
  94 config MCA
  95         bool
  96         help
  97           MicroChannel Architecture is found in some IBM PS/2 machines and
  98           laptops.  It is a bus system similar to PCI or ISA. See
  99           <file:Documentation/mca.txt> (and especially the web page given
 100           there) before attempting to build an MCA bus kernel.
 101
 102 config STACKTRACE_SUPPORT
 103         bool
 104         default y
 105
 106 config HAVE_LATENCYTOP_SUPPORT
 107         bool
 108         depends on !SMP
 109         default y
 110
 111 config LOCKDEP_SUPPORT
 112         bool
 113         default y
 114
 115 config TRACE_IRQFLAGS_SUPPORT
 116         bool
 117         default y
 118
 119 config HARDIRQS_SW_RESEND
 120         bool
 121         default y
 122
 123 config GENERIC_IRQ_PROBE
 124         bool
 125         default y
 126
 127 config GENERIC_LOCKBREAK
 128         bool
 129         default y
 130         depends on SMP && PREEMPT
 131
 132 config RWSEM_GENERIC_SPINLOCK
 133         bool
 134         default y
 135
 136 config RWSEM_XCHGADD_ALGORITHM
 137         bool
 138
 139 config ARCH_HAS_ILOG2_U32
 140         bool
 141
 142 config ARCH_HAS_ILOG2_U64
 143         bool
 144
 145 config ARCH_HAS_CPUFREQ
 146         bool
 147         help
 148           Internal node to signify that the ARCH has CPUFREQ support
 149           and that the relevant menu configurations are displayed for
 150           it.
 151
 152 config ARCH_HAS_CPU_IDLE_WAIT
 153        def_bool y
 154
 155 config GENERIC_HWEIGHT
 156         bool
 157         default y
 158
 159 config GENERIC_CALIBRATE_DELAY
 160         bool
 161         default y
 162
 163 config ARCH_MAY_HAVE_PC_FDC
 164         bool
 165
 166 config ZONE_DMA
 167         bool
 168
 169 config NEED_DMA_MAP_STATE
 170        def_bool y
 171
 172 config GENERIC_ISA_DMA
 173         bool
 174
 175 config FIQ
 176         bool
 177
 178 config ARCH_MTD_XIP
 179         bool
 180
 181 config ARM_L1_CACHE_SHIFT_6
 182         bool
 183         help
 184           Setting ARM L1 cache line size to 64 Bytes.
 185
 186 config VECTORS_BASE
 187         hex
 188         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 189         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 190         default 0x00000000
 191         help
 192           The base address of exception vectors.
 193
 194 source "init/Kconfig"
 195
 196 source "kernel/Kconfig.freezer"
 197
 198 menu "System Type"
 199
 200 config MMU
 201         bool "MMU-based Paged Memory Management Support"
 202         default y
 203         help
 204           Select if you want MMU-based virtualised addressing space
 205           support by paged memory management. If unsure, say 'Y'.
 206
 207 #
 208 # The "ARM system type" choice list is ordered alphabetically by option
 209 # text.  Please add new entries in the option alphabetic order.
 210 #
 211 choice
 212         prompt "ARM system type"
 213         default ARCH_VERSATILE
 214
 215 config ARCH_AAEC2000
 216         bool "Agilent AAEC-2000 based"
 217         select CPU_ARM920T
 218         select ARM_AMBA
 219         select HAVE_CLK
 220         select ARCH_USES_GETTIMEOFFSET
 221         help
 222           This enables support for systems based on the Agilent AAEC-2000
 223
 224 config ARCH_INTEGRATOR
 225         bool "ARM Ltd. Integrator family"
 226         select ARM_AMBA
 227         select ARCH_HAS_CPUFREQ
 228         select CLKDEV_LOOKUP
 229         select ICST
 230         select GENERIC_CLOCKEVENTS
 231         select PLAT_VERSATILE
 232         help
 233           Support for ARM's Integrator platform.
 234
 235 config ARCH_REALVIEW
 236         bool "ARM Ltd. RealView family"
 237         select ARM_AMBA
 238         select CLKDEV_LOOKUP
 239         select HAVE_SCHED_CLOCK
 240         select ICST
 241         select GENERIC_CLOCKEVENTS
 242         select ARCH_WANT_OPTIONAL_GPIOLIB
 243         select PLAT_VERSATILE
 244         select ARM_TIMER_SP804
 245         select GPIO_PL061 if GPIOLIB
 246         help
 247           This enables support for ARM Ltd RealView boards.
 248
 249 config ARCH_VERSATILE
 250         bool "ARM Ltd. Versatile family"
 251         select ARM_AMBA
 252         select ARM_VIC
 253         select CLKDEV_LOOKUP
 254         select HAVE_SCHED_CLOCK
 255         select ICST
 256         select GENERIC_CLOCKEVENTS
 257         select ARCH_WANT_OPTIONAL_GPIOLIB
 258         select PLAT_VERSATILE
 259         select ARM_TIMER_SP804
 260         help
 261           This enables support for ARM Ltd Versatile board.
 262
 263 config ARCH_VEXPRESS
 264         bool "ARM Ltd. Versatile Express family"
 265         select ARCH_WANT_OPTIONAL_GPIOLIB
 266         select ARM_AMBA
 267         select ARM_TIMER_SP804
 268         select CLKDEV_LOOKUP
 269         select GENERIC_CLOCKEVENTS
 270         select HAVE_CLK
 271         select HAVE_SCHED_CLOCK
 272         select ICST
 273         select PLAT_VERSATILE
 274         help
 275           This enables support for the ARM Ltd Versatile Express boards.
 276
 277 config ARCH_AT91
 278         bool "Atmel AT91"
 279         select ARCH_REQUIRE_GPIOLIB
 280         select HAVE_CLK
 281         help
 282           This enables support for systems based on the Atmel AT91RM9200,
 283           AT91SAM9 and AT91CAP9 processors.
 284
 285 config ARCH_BCMRING
 286         bool "Broadcom BCMRING"
 287         depends on MMU
 288         select CPU_V6
 289         select ARM_AMBA
 290         select CLKDEV_LOOKUP
 291         select GENERIC_CLOCKEVENTS
 292         select ARCH_WANT_OPTIONAL_GPIOLIB
 293         help
 294           Support for Broadcom's BCMRing platform.
 295
 296 config ARCH_CLPS711X
 297         bool "Cirrus Logic CLPS711x/EP721x-based"
 298         select CPU_ARM720T
 299         select ARCH_USES_GETTIMEOFFSET
 300         help
 301           Support for Cirrus Logic 711x/721x based boards.
 302
 303 config ARCH_CNS3XXX
 304         bool "Cavium Networks CNS3XXX family"
 305         select CPU_V6
 306         select GENERIC_CLOCKEVENTS
 307         select ARM_GIC
 308         select MIGHT_HAVE_PCI
 309         select PCI_DOMAINS if PCI
 310         help
 311           Support for Cavium Networks CNS3XXX platform.
 312
 313 config ARCH_GEMINI
 314         bool "Cortina Systems Gemini"
 315         select CPU_FA526
 316         select ARCH_REQUIRE_GPIOLIB
 317         select ARCH_USES_GETTIMEOFFSET
 318         help
 319           Support for the Cortina Systems Gemini family SoCs
 320
 321 config ARCH_EBSA110
 322         bool "EBSA-110"
 323         select CPU_SA110
 324         select ISA
 325         select NO_IOPORT
 326         select ARCH_USES_GETTIMEOFFSET
 327         help
 328           This is an evaluation board for the StrongARM processor available
 329           from Digital. It has limited hardware on-board, including an
 330           Ethernet interface, two PCMCIA sockets, two serial ports and a
 331           parallel port.
 332
 333 config ARCH_EP93XX
 334         bool "EP93xx-based"
 335         select CPU_ARM920T
 336         select ARM_AMBA
 337         select ARM_VIC
 338         select CLKDEV_LOOKUP
 339         select ARCH_REQUIRE_GPIOLIB
 340         select ARCH_HAS_HOLES_MEMORYMODEL
 341         select ARCH_USES_GETTIMEOFFSET
 342         help
 343           This enables support for the Cirrus EP93xx series of CPUs.
 344
 345 config ARCH_FOOTBRIDGE
 346         bool "FootBridge"
 347         select CPU_SA110
 348         select FOOTBRIDGE
 349         select ARCH_USES_GETTIMEOFFSET
 350         help
 351           Support for systems based on the DC21285 companion chip
 352           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 353
 354 config ARCH_MXC
 355         bool "Freescale MXC/iMX-based"
 356         select GENERIC_CLOCKEVENTS
 357         select ARCH_REQUIRE_GPIOLIB
 358         select CLKDEV_LOOKUP
 359         help
 360           Support for Freescale MXC/iMX-based family of processors
 361
 362 config ARCH_MXS
 363         bool "Freescale MXS-based"
 364         select GENERIC_CLOCKEVENTS
 365         select ARCH_REQUIRE_GPIOLIB
 366         select CLKDEV_LOOKUP
 367         help
 368           Support for Freescale MXS-based family of processors
 369
 370 config ARCH_STMP3XXX
 371         bool "Freescale STMP3xxx"
 372         select CPU_ARM926T
 373         select CLKDEV_LOOKUP
 374         select ARCH_REQUIRE_GPIOLIB
 375         select GENERIC_CLOCKEVENTS
 376         select USB_ARCH_HAS_EHCI
 377         help
 378           Support for systems based on the Freescale 3xxx CPUs.
 379
 380 config ARCH_NETX
 381         bool "Hilscher NetX based"
 382         select CPU_ARM926T
 383         select ARM_VIC
 384         select GENERIC_CLOCKEVENTS
 385         help
 386           This enables support for systems based on the Hilscher NetX Soc
 387
 388 config ARCH_H720X
 389         bool "Hynix HMS720x-based"
 390         select CPU_ARM720T
 391         select ISA_DMA_API
 392         select ARCH_USES_GETTIMEOFFSET
 393         help
 394           This enables support for systems based on the Hynix HMS720x
 395
 396 config ARCH_IOP13XX
 397         bool "IOP13xx-based"
 398         depends on MMU
 399         select CPU_XSC3
 400         select PLAT_IOP
 401         select PCI
 402         select ARCH_SUPPORTS_MSI
 403         select VMSPLIT_1G
 404         help
 405           Support for Intel's IOP13XX (XScale) family of processors.
 406
 407 config ARCH_IOP32X
 408         bool "IOP32x-based"
 409         depends on MMU
 410         select CPU_XSCALE
 411         select PLAT_IOP
 412         select PCI
 413         select ARCH_REQUIRE_GPIOLIB
 414         help
 415           Support for Intel's 80219 and IOP32X (XScale) family of
 416           processors.
 417
 418 config ARCH_IOP33X
 419         bool "IOP33x-based"
 420         depends on MMU
 421         select CPU_XSCALE
 422         select PLAT_IOP
 423         select PCI
 424         select ARCH_REQUIRE_GPIOLIB
 425         help
 426           Support for Intel's IOP33X (XScale) family of processors.
 427
 428 config ARCH_IXP23XX
 429         bool "IXP23XX-based"
 430         depends on MMU
 431         select CPU_XSC3
 432         select PCI
 433         select ARCH_USES_GETTIMEOFFSET
 434         help
 435           Support for Intel's IXP23xx (XScale) family of processors.
 436
 437 config ARCH_IXP2000
 438         bool "IXP2400/2800-based"
 439         depends on MMU
 440         select CPU_XSCALE
 441         select PCI
 442         select ARCH_USES_GETTIMEOFFSET
 443         help
 444           Support for Intel's IXP2400/2800 (XScale) family of processors.
 445
 446 config ARCH_IXP4XX
 447         bool "IXP4xx-based"
 448         depends on MMU
 449         select CPU_XSCALE
 450         select GENERIC_GPIO
 451         select GENERIC_CLOCKEVENTS
 452         select HAVE_SCHED_CLOCK
 453         select MIGHT_HAVE_PCI
 454         select DMABOUNCE if PCI
 455         help
 456           Support for Intel's IXP4XX (XScale) family of processors.
 457
 458 config ARCH_DOVE
 459         bool "Marvell Dove"
 460         select PCI
 461         select ARCH_REQUIRE_GPIOLIB
 462         select GENERIC_CLOCKEVENTS
 463         select PLAT_ORION
 464         help
 465           Support for the Marvell Dove SoC 88AP510
 466
 467 config ARCH_KIRKWOOD
 468         bool "Marvell Kirkwood"
 469         select CPU_FEROCEON
 470         select PCI
 471         select ARCH_REQUIRE_GPIOLIB
 472         select GENERIC_CLOCKEVENTS
 473         select PLAT_ORION
 474         help
 475           Support for the following Marvell Kirkwood series SoCs:
 476           88F6180, 88F6192 and 88F6281.
 477
 478 config ARCH_LOKI
 479         bool "Marvell Loki (88RC8480)"
 480         select CPU_FEROCEON
 481         select GENERIC_CLOCKEVENTS
 482         select PLAT_ORION
 483         help
 484           Support for the Marvell Loki (88RC8480) SoC.
 485
 486 config ARCH_LPC32XX
 487         bool "NXP LPC32XX"
 488         select CPU_ARM926T
 489         select ARCH_REQUIRE_GPIOLIB
 490         select HAVE_IDE
 491         select ARM_AMBA
 492         select USB_ARCH_HAS_OHCI
 493         select CLKDEV_LOOKUP
 494         select GENERIC_TIME
 495         select GENERIC_CLOCKEVENTS
 496         help
 497           Support for the NXP LPC32XX family of processors
 498
 499 config ARCH_MV78XX0
 500         bool "Marvell MV78xx0"
 501         select CPU_FEROCEON
 502         select PCI
 503         select ARCH_REQUIRE_GPIOLIB
 504         select GENERIC_CLOCKEVENTS
 505         select PLAT_ORION
 506         help
 507           Support for the following Marvell MV78xx0 series SoCs:
 508           MV781x0, MV782x0.
 509
 510 config ARCH_ORION5X
 511         bool "Marvell Orion"
 512         depends on MMU
 513         select CPU_FEROCEON
 514         select PCI
 515         select ARCH_REQUIRE_GPIOLIB
 516         select GENERIC_CLOCKEVENTS
 517         select PLAT_ORION
 518         help
 519           Support for the following Marvell Orion 5x series SoCs:
 520           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 521           Orion-2 (5281), Orion-1-90 (6183).
 522
 523 config ARCH_MMP
 524         bool "Marvell PXA168/910/MMP2"
 525         depends on MMU
 526         select ARCH_REQUIRE_GPIOLIB
 527         select CLKDEV_LOOKUP
 528         select GENERIC_CLOCKEVENTS
 529         select HAVE_SCHED_CLOCK
 530         select TICK_ONESHOT
 531         select PLAT_PXA
 532         select SPARSE_IRQ
 533         help
 534           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 535
 536 config ARCH_KS8695
 537         bool "Micrel/Kendin KS8695"
 538         select CPU_ARM922T
 539         select ARCH_REQUIRE_GPIOLIB
 540         select ARCH_USES_GETTIMEOFFSET
 541         help
 542           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 543           System-on-Chip devices.
 544
 545 config ARCH_NS9XXX
 546         bool "NetSilicon NS9xxx"
 547         select CPU_ARM926T
 548         select GENERIC_GPIO
 549         select GENERIC_CLOCKEVENTS
 550         select HAVE_CLK
 551         help
 552           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 553           System.
 554
 555           <http://www.digi.com/products/microprocessors/index.jsp>
 556
 557 config ARCH_W90X900
 558         bool "Nuvoton W90X900 CPU"
 559         select CPU_ARM926T
 560         select ARCH_REQUIRE_GPIOLIB
 561         select CLKDEV_LOOKUP
 562         select GENERIC_CLOCKEVENTS
 563         help
 564           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 565           At present, the w90x900 has been renamed nuc900, regarding
 566           the ARM series product line, you can login the following
 567           link address to know more.
 568
 569           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 570                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 571
 572 config ARCH_NUC93X
 573         bool "Nuvoton NUC93X CPU"
 574         select CPU_ARM926T
 575         select CLKDEV_LOOKUP
 576         help
 577           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 578           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 579
 580 config ARCH_TEGRA
 581         bool "NVIDIA Tegra"
 582         select CLKDEV_LOOKUP
 583         select GENERIC_TIME
 584         select GENERIC_CLOCKEVENTS
 585         select GENERIC_GPIO
 586         select HAVE_CLK
 587         select HAVE_SCHED_CLOCK
 588         select ARCH_HAS_BARRIERS if CACHE_L2X0
 589         select ARCH_HAS_CPUFREQ
 590         help
 591           This enables support for NVIDIA Tegra based systems (Tegra APX,
 592           Tegra 6xx and Tegra 2 series).
 593
 594 config ARCH_PNX4008
 595         bool "Philips Nexperia PNX4008 Mobile"
 596         select CPU_ARM926T
 597         select CLKDEV_LOOKUP
 598         select ARCH_USES_GETTIMEOFFSET
 599         help
 600           This enables support for Philips PNX4008 mobile platform.
 601
 602 config ARCH_PXA
 603         bool "PXA2xx/PXA3xx-based"
 604         depends on MMU
 605         select ARCH_MTD_XIP
 606         select ARCH_HAS_CPUFREQ
 607         select CLKDEV_LOOKUP
 608         select ARCH_REQUIRE_GPIOLIB
 609         select GENERIC_CLOCKEVENTS
 610         select HAVE_SCHED_CLOCK
 611         select TICK_ONESHOT
 612         select PLAT_PXA
 613         select SPARSE_IRQ
 614         help
 615           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 616
 617 config ARCH_MSM
 618         bool "Qualcomm MSM"
 619         select HAVE_CLK
 620         select GENERIC_CLOCKEVENTS
 621         select ARCH_REQUIRE_GPIOLIB
 622         help
 623           Support for Qualcomm MSM/QSD based systems.  This runs on the
 624           apps processor of the MSM/QSD and depends on a shared memory
 625           interface to the modem processor which runs the baseband
 626           stack and controls some vital subsystems
 627           (clock and power control, etc).
 628
 629 config ARCH_SHMOBILE
 630         bool "Renesas SH-Mobile / R-Mobile"
 631         select HAVE_CLK
 632         select CLKDEV_LOOKUP
 633         select GENERIC_CLOCKEVENTS
 634         select NO_IOPORT
 635         select SPARSE_IRQ
 636         select MULTI_IRQ_HANDLER
 637         help
 638           Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
 639
 640 config ARCH_RPC
 641         bool "RiscPC"
 642         select ARCH_ACORN
 643         select FIQ
 644         select TIMER_ACORN
 645         select ARCH_MAY_HAVE_PC_FDC
 646         select HAVE_PATA_PLATFORM
 647         select ISA_DMA_API
 648         select NO_IOPORT
 649         select ARCH_SPARSEMEM_ENABLE
 650         select ARCH_USES_GETTIMEOFFSET
 651         help
 652           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 653           CD-ROM interface, serial and parallel port, and the floppy drive.
 654
 655 config ARCH_SA1100
 656         bool "SA1100-based"
 657         select CPU_SA1100
 658         select ISA
 659         select ARCH_SPARSEMEM_ENABLE
 660         select ARCH_MTD_XIP
 661         select ARCH_HAS_CPUFREQ
 662         select CPU_FREQ
 663         select GENERIC_CLOCKEVENTS
 664         select HAVE_CLK
 665         select HAVE_SCHED_CLOCK
 666         select TICK_ONESHOT
 667         select ARCH_REQUIRE_GPIOLIB
 668         help
 669           Support for StrongARM 11x0 based boards.
 670
 671 config ARCH_S3C2410
 672         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
 673         select GENERIC_GPIO
 674         select ARCH_HAS_CPUFREQ
 675         select HAVE_CLK
 676         select ARCH_USES_GETTIMEOFFSET
 677         select HAVE_S3C2410_I2C if I2C
 678         help
 679           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 680           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 681           the Samsung SMDK2410 development board (and derivatives).
 682
 683           Note, the S3C2416 and the S3C2450 are so close that they even share
 684           the same SoC ID code. This means that there is no seperate machine
 685           directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
 686
 687 config ARCH_S3C64XX
 688         bool "Samsung S3C64XX"
 689         select PLAT_SAMSUNG
 690         select CPU_V6
 691         select ARM_VIC
 692         select HAVE_CLK
 693         select NO_IOPORT
 694         select ARCH_USES_GETTIMEOFFSET
 695         select ARCH_HAS_CPUFREQ
 696         select ARCH_REQUIRE_GPIOLIB
 697         select SAMSUNG_CLKSRC
 698         select SAMSUNG_IRQ_VIC_TIMER
 699         select SAMSUNG_IRQ_UART
 700         select S3C_GPIO_TRACK
 701         select S3C_GPIO_PULL_UPDOWN
 702         select S3C_GPIO_CFG_S3C24XX
 703         select S3C_GPIO_CFG_S3C64XX
 704         select S3C_DEV_NAND
 705         select USB_ARCH_HAS_OHCI
 706         select SAMSUNG_GPIOLIB_4BIT
 707         select HAVE_S3C2410_I2C if I2C
 708         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 709         help
 710           Samsung S3C64XX series based systems
 711
 712 config ARCH_S5P64X0
 713         bool "Samsung S5P6440 S5P6450"
 714         select CPU_V6
 715         select GENERIC_GPIO
 716         select HAVE_CLK
 717         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 718         select ARCH_USES_GETTIMEOFFSET
 719         select HAVE_S3C2410_I2C if I2C
 720         select HAVE_S3C_RTC if RTC_CLASS
 721         help
 722           Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
 723           SMDK6450.
 724
 725 config ARCH_S5P6442
 726         bool "Samsung S5P6442"
 727         select CPU_V6
 728         select GENERIC_GPIO
 729         select HAVE_CLK
 730         select ARCH_USES_GETTIMEOFFSET
 731         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 732         help
 733           Samsung S5P6442 CPU based systems
 734
 735 config ARCH_S5PC100
 736         bool "Samsung S5PC100"
 737         select GENERIC_GPIO
 738         select HAVE_CLK
 739         select CPU_V7
 740         select ARM_L1_CACHE_SHIFT_6
 741         select ARCH_USES_GETTIMEOFFSET
 742         select HAVE_S3C2410_I2C if I2C
 743         select HAVE_S3C_RTC if RTC_CLASS
 744         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 745         help
 746           Samsung S5PC100 series based systems
 747
 748 config ARCH_S5PV210
 749         bool "Samsung S5PV210/S5PC110"
 750         select CPU_V7
 751         select ARCH_SPARSEMEM_ENABLE
 752         select GENERIC_GPIO
 753         select HAVE_CLK
 754         select ARM_L1_CACHE_SHIFT_6
 755         select ARCH_HAS_CPUFREQ
 756         select ARCH_USES_GETTIMEOFFSET
 757         select HAVE_S3C2410_I2C if I2C
 758         select HAVE_S3C_RTC if RTC_CLASS
 759         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 760         help
 761           Samsung S5PV210/S5PC110 series based systems
 762
 763 config ARCH_S5PV310
 764         bool "Samsung S5PV310/S5PC210"
 765         select CPU_V7
 766         select ARCH_SPARSEMEM_ENABLE
 767         select GENERIC_GPIO
 768         select HAVE_CLK
 769         select ARCH_HAS_CPUFREQ
 770         select GENERIC_CLOCKEVENTS
 771         select HAVE_S3C_RTC if RTC_CLASS
 772         select HAVE_S3C2410_I2C if I2C
 773         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 774         help
 775           Samsung S5PV310 series based systems
 776
 777 config ARCH_SHARK
 778         bool "Shark"
 779         select CPU_SA110
 780         select ISA
 781         select ISA_DMA
 782         select ZONE_DMA
 783         select PCI
 784         select ARCH_USES_GETTIMEOFFSET
 785         help
 786           Support for the StrongARM based Digital DNARD machine, also known
 787           as "Shark" (<http://www.shark-linux.de/shark.html>).
 788
 789 config ARCH_TCC_926
 790         bool "Telechips TCC ARM926-based systems"
 791         select CPU_ARM926T
 792         select HAVE_CLK
 793         select CLKDEV_LOOKUP
 794         select GENERIC_CLOCKEVENTS
 795         help
 796           Support for Telechips TCC ARM926-based systems.
 797
 798 config ARCH_LH7A40X
 799         bool "Sharp LH7A40X"
 800         select CPU_ARM922T
 801         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 802         select ARCH_USES_GETTIMEOFFSET
 803         help
 804           Say Y here for systems based on one of the Sharp LH7A40X
 805           System on a Chip processors.  These CPUs include an ARM922T
 806           core with a wide array of integrated devices for
 807           hand-held and low-power applications.
 808
 809 config ARCH_U300
 810         bool "ST-Ericsson U300 Series"
 811         depends on MMU
 812         select CPU_ARM926T
 813         select HAVE_SCHED_CLOCK
 814         select HAVE_TCM
 815         select ARM_AMBA
 816         select ARM_VIC
 817         select GENERIC_CLOCKEVENTS
 818         select CLKDEV_LOOKUP
 819         select GENERIC_GPIO
 820         help
 821           Support for ST-Ericsson U300 series mobile platforms.
 822
 823 config ARCH_U8500
 824         bool "ST-Ericsson U8500 Series"
 825         select CPU_V7
 826         select ARM_AMBA
 827         select GENERIC_CLOCKEVENTS
 828         select CLKDEV_LOOKUP
 829         select ARCH_REQUIRE_GPIOLIB
 830         select ARCH_HAS_CPUFREQ
 831         help
 832           Support for ST-Ericsson's Ux500 architecture
 833
 834 config ARCH_NOMADIK
 835         bool "STMicroelectronics Nomadik"
 836         select ARM_AMBA
 837         select ARM_VIC
 838         select CPU_ARM926T
 839         select CLKDEV_LOOKUP
 840         select GENERIC_CLOCKEVENTS
 841         select ARCH_REQUIRE_GPIOLIB
 842         help
 843           Support for the Nomadik platform by ST-Ericsson
 844
 845 config ARCH_DAVINCI
 846         bool "TI DaVinci"
 847         select GENERIC_CLOCKEVENTS
 848         select ARCH_REQUIRE_GPIOLIB
 849         select ZONE_DMA
 850         select HAVE_IDE
 851         select CLKDEV_LOOKUP
 852         select GENERIC_ALLOCATOR
 853         select ARCH_HAS_HOLES_MEMORYMODEL
 854         help
 855           Support for TI's DaVinci platform.
 856
 857 config ARCH_OMAP
 858         bool "TI OMAP"
 859         select HAVE_CLK
 860         select ARCH_REQUIRE_GPIOLIB
 861         select ARCH_HAS_CPUFREQ
 862         select GENERIC_CLOCKEVENTS
 863         select HAVE_SCHED_CLOCK
 864         select ARCH_HAS_HOLES_MEMORYMODEL
 865         help
 866           Support for TI's OMAP platform (OMAP1/2/3/4).
 867
 868 config PLAT_SPEAR
 869         bool "ST SPEAr"
 870         select ARM_AMBA
 871         select ARCH_REQUIRE_GPIOLIB
 872         select CLKDEV_LOOKUP
 873         select GENERIC_CLOCKEVENTS
 874         select HAVE_CLK
 875         help
 876           Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
 877
 878 endchoice
 879
 880 #
 881 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 882 # Kconfigs may be included either alphabetically (according to the
 883 # plat- suffix) or along side the corresponding mach-* source.
 884 #
 885 source "arch/arm/mach-aaec2000/Kconfig"
 886
 887 source "arch/arm/mach-at91/Kconfig"
 888
 889 source "arch/arm/mach-bcmring/Kconfig"
 890
 891 source "arch/arm/mach-clps711x/Kconfig"
 892
 893 source "arch/arm/mach-cns3xxx/Kconfig"
 894
 895 source "arch/arm/mach-davinci/Kconfig"
 896
 897 source "arch/arm/mach-dove/Kconfig"
 898
 899 source "arch/arm/mach-ep93xx/Kconfig"
 900
 901 source "arch/arm/mach-footbridge/Kconfig"
 902
 903 source "arch/arm/mach-gemini/Kconfig"
 904
 905 source "arch/arm/mach-h720x/Kconfig"
 906
 907 source "arch/arm/mach-integrator/Kconfig"
 908
 909 source "arch/arm/mach-iop32x/Kconfig"
 910
 911 source "arch/arm/mach-iop33x/Kconfig"
 912
 913 source "arch/arm/mach-iop13xx/Kconfig"
 914
 915 source "arch/arm/mach-ixp4xx/Kconfig"
 916
 917 source "arch/arm/mach-ixp2000/Kconfig"
 918
 919 source "arch/arm/mach-ixp23xx/Kconfig"
 920
 921 source "arch/arm/mach-kirkwood/Kconfig"
 922
 923 source "arch/arm/mach-ks8695/Kconfig"
 924
 925 source "arch/arm/mach-lh7a40x/Kconfig"
 926
 927 source "arch/arm/mach-loki/Kconfig"
 928
 929 source "arch/arm/mach-lpc32xx/Kconfig"
 930
 931 source "arch/arm/mach-msm/Kconfig"
 932
 933 source "arch/arm/mach-mv78xx0/Kconfig"
 934
 935 source "arch/arm/plat-mxc/Kconfig"
 936
 937 source "arch/arm/mach-mxs/Kconfig"
 938
 939 source "arch/arm/mach-netx/Kconfig"
 940
 941 source "arch/arm/mach-nomadik/Kconfig"
 942 source "arch/arm/plat-nomadik/Kconfig"
 943
 944 source "arch/arm/mach-ns9xxx/Kconfig"
 945
 946 source "arch/arm/mach-nuc93x/Kconfig"
 947
 948 source "arch/arm/plat-omap/Kconfig"
 949
 950 source "arch/arm/mach-omap1/Kconfig"
 951
 952 source "arch/arm/mach-omap2/Kconfig"
 953
 954 source "arch/arm/mach-orion5x/Kconfig"
 955
 956 source "arch/arm/mach-pxa/Kconfig"
 957 source "arch/arm/plat-pxa/Kconfig"
 958
 959 source "arch/arm/mach-mmp/Kconfig"
 960
 961 source "arch/arm/mach-realview/Kconfig"
 962
 963 source "arch/arm/mach-sa1100/Kconfig"
 964
 965 source "arch/arm/plat-samsung/Kconfig"
 966 source "arch/arm/plat-s3c24xx/Kconfig"
 967 source "arch/arm/plat-s5p/Kconfig"
 968
 969 source "arch/arm/plat-spear/Kconfig"
 970
 971 source "arch/arm/plat-tcc/Kconfig"
 972
 973 if ARCH_S3C2410
 974 source "arch/arm/mach-s3c2400/Kconfig"
 975 source "arch/arm/mach-s3c2410/Kconfig"
 976 source "arch/arm/mach-s3c2412/Kconfig"
 977 source "arch/arm/mach-s3c2416/Kconfig"
 978 source "arch/arm/mach-s3c2440/Kconfig"
 979 source "arch/arm/mach-s3c2443/Kconfig"
 980 endif
 981
 982 if ARCH_S3C64XX
 983 source "arch/arm/mach-s3c64xx/Kconfig"
 984 endif
 985
 986 source "arch/arm/mach-s5p64x0/Kconfig"
 987
 988 source "arch/arm/mach-s5p6442/Kconfig"
 989
 990 source "arch/arm/mach-s5pc100/Kconfig"
 991
 992 source "arch/arm/mach-s5pv210/Kconfig"
 993
 994 source "arch/arm/mach-s5pv310/Kconfig"
 995
 996 source "arch/arm/mach-shmobile/Kconfig"
 997
 998 source "arch/arm/plat-stmp3xxx/Kconfig"
 999
1000 source "arch/arm/mach-tegra/Kconfig"
1001
1002 source "arch/arm/mach-u300/Kconfig"
1003
1004 source "arch/arm/mach-ux500/Kconfig"
1005
1006 source "arch/arm/mach-versatile/Kconfig"
1007
1008 source "arch/arm/mach-vexpress/Kconfig"
1009
1010 source "arch/arm/mach-w90x900/Kconfig"
1011
1012 # Definitions to make life easier
1013 config ARCH_ACORN
1014         bool
1015
1016 config PLAT_IOP
1017         bool
1018         select GENERIC_CLOCKEVENTS
1019         select HAVE_SCHED_CLOCK
1020
1021 config PLAT_ORION
1022         bool
1023         select HAVE_SCHED_CLOCK
1024
1025 config PLAT_PXA
1026         bool
1027
1028 config PLAT_VERSATILE
1029         bool
1030
1031 config ARM_TIMER_SP804
1032         bool
1033
1034 source arch/arm/mm/Kconfig
1035
1036 config IWMMXT
1037         bool "Enable iWMMXt support"
1038         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1039         default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
1040         help
1041           Enable support for iWMMXt context switching at run time if
1042           running on a CPU that supports it.
1043
1044 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
1045 config XSCALE_PMU
1046         bool
1047         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
1048         default y
1049
1050 config CPU_HAS_PMU
1051         depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
1052                    (!ARCH_OMAP3 || OMAP3_EMU)
1053         default y
1054         bool
1055
1056 config MULTI_IRQ_HANDLER
1057         bool
1058         help
1059           Allow each machine to specify it's own IRQ handler at run time.
1060
1061 if !MMU
1062 source "arch/arm/Kconfig-nommu"
1063 endif
1064
1065 config ARM_ERRATA_411920
1066         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1067         depends on CPU_V6
1068         help
1069           Invalidation of the Instruction Cache operation can
1070           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1071           It does not affect the MPCore. This option enables the ARM Ltd.
1072           recommended workaround.
1073
1074 config ARM_ERRATA_430973
1075         bool "ARM errata: Stale prediction on replaced interworking branch"
1076         depends on CPU_V7
1077         help
1078           This option enables the workaround for the 430973 Cortex-A8
1079           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1080           interworking branch is replaced with another code sequence at the
1081           same virtual address, whether due to self-modifying code or virtual
1082           to physical address re-mapping, Cortex-A8 does not recover from the
1083           stale interworking branch prediction. This results in Cortex-A8
1084           executing the new code sequence in the incorrect ARM or Thumb state.
1085           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1086           and also flushes the branch target cache at every context switch.
1087           Note that setting specific bits in the ACTLR register may not be
1088           available in non-secure mode.
1089
1090 config ARM_ERRATA_458693
1091         bool "ARM errata: Processor deadlock when a false hazard is created"
1092         depends on CPU_V7
1093         help
1094           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1095           erratum. For very specific sequences of memory operations, it is
1096           possible for a hazard condition intended for a cache line to instead
1097           be incorrectly associated with a different cache line. This false
1098           hazard might then cause a processor deadlock. The workaround enables
1099           the L1 caching of the NEON accesses and disables the PLD instruction
1100           in the ACTLR register. Note that setting specific bits in the ACTLR
1101           register may not be available in non-secure mode.
1102
1103 config ARM_ERRATA_460075
1104         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1105         depends on CPU_V7
1106         help
1107           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1108           erratum. Any asynchronous access to the L2 cache may encounter a
1109           situation in which recent store transactions to the L2 cache are lost
1110           and overwritten with stale memory contents from external memory. The
1111           workaround disables the write-allocate mode for the L2 cache via the
1112           ACTLR register. Note that setting specific bits in the ACTLR register
1113           may not be available in non-secure mode.
1114
1115 config ARM_ERRATA_742230
1116         bool "ARM errata: DMB operation may be faulty"
1117         depends on CPU_V7 && SMP
1118         help
1119           This option enables the workaround for the 742230 Cortex-A9
1120           (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1121           between two write operations may not ensure the correct visibility
1122           ordering of the two writes. This workaround sets a specific bit in
1123           the diagnostic register of the Cortex-A9 which causes the DMB
1124           instruction to behave as a DSB, ensuring the correct behaviour of
1125           the two writes.
1126
1127 config ARM_ERRATA_742231
1128         bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1129         depends on CPU_V7 && SMP
1130         help
1131           This option enables the workaround for the 742231 Cortex-A9
1132           (r2p0..r2p2) erratum. Under certain conditions, specific to the
1133           Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1134           accessing some data located in the same cache line, may get corrupted
1135           data due to bad handling of the address hazard when the line gets
1136           replaced from one of the CPUs at the same time as another CPU is
1137           accessing it. This workaround sets specific bits in the diagnostic
1138           register of the Cortex-A9 which reduces the linefill issuing
1139           capabilities of the processor.
1140
1141 config PL310_ERRATA_588369
1142         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1143         depends on CACHE_L2X0 && ARCH_OMAP4
1144         help
1145            The PL310 L2 cache controller implements three types of Clean &
1146            Invalidate maintenance operations: by Physical Address
1147            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1148            They are architecturally defined to behave as the execution of a
1149            clean operation followed immediately by an invalidate operation,
1150            both performing to the same memory location. This functionality
1151            is not correctly implemented in PL310 as clean lines are not
1152            invalidated as a result of these operations. Note that this errata
1153            uses Texas Instrument's secure monitor api.
1154
1155 config ARM_ERRATA_720789
1156         bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1157         depends on CPU_V7 && SMP
1158         help
1159           This option enables the workaround for the 720789 Cortex-A9 (prior to
1160           r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1161           broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1162           As a consequence of this erratum, some TLB entries which should be
1163           invalidated are not, resulting in an incoherency in the system page
1164           tables. The workaround changes the TLB flushing routines to invalidate
1165           entries regardless of the ASID.
1166
1167 config ARM_ERRATA_743622
1168         bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1169         depends on CPU_V7
1170         help
1171           This option enables the workaround for the 743622 Cortex-A9
1172           (r2p0..r2p2) erratum. Under very rare conditions, a faulty
1173           optimisation in the Cortex-A9 Store Buffer may lead to data
1174           corruption. This workaround sets a specific bit in the diagnostic
1175           register of the Cortex-A9 which disables the Store Buffer
1176           optimisation, preventing the defect from occurring. This has no
1177           visible impact on the overall performance or power consumption of the
1178           processor.
1179
1180 endmenu
1181
1182 source "arch/arm/common/Kconfig"
1183
1184 menu "Bus support"
1185
1186 config ARM_AMBA
1187         bool
1188
1189 config ISA
1190         bool
1191         help
1192           Find out whether you have ISA slots on your motherboard.  ISA is the
1193           name of a bus system, i.e. the way the CPU talks to the other stuff
1194           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1195           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1196           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1197
1198 # Select ISA DMA controller support
1199 config ISA_DMA
1200         bool
1201         select ISA_DMA_API
1202
1203 # Select ISA DMA interface
1204 config ISA_DMA_API
1205         bool
1206
1207 config PCI
1208         bool "PCI support" if MIGHT_HAVE_PCI
1209         help
1210           Find out whether you have a PCI motherboard. PCI is the name of a
1211           bus system, i.e. the way the CPU talks to the other stuff inside
1212           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1213           VESA. If you have PCI, say Y, otherwise N.
1214
1215 config PCI_DOMAINS
1216         bool
1217         depends on PCI
1218
1219 config PCI_NANOENGINE
1220         bool "BSE nanoEngine PCI support"
1221         depends on SA1100_NANOENGINE
1222         help
1223           Enable PCI on the BSE nanoEngine board.
1224
1225 config PCI_SYSCALL
1226         def_bool PCI
1227
1228 # Select the host bridge type
1229 config PCI_HOST_VIA82C505
1230         bool
1231         depends on PCI && ARCH_SHARK
1232         default y
1233
1234 config PCI_HOST_ITE8152
1235         bool
1236         depends on PCI && MACH_ARMCORE
1237         default y
1238         select DMABOUNCE
1239
1240 source "drivers/pci/Kconfig"
1241
1242 source "drivers/pcmcia/Kconfig"
1243
1244 endmenu
1245
1246 menu "Kernel Features"
1247
1248 source "kernel/time/Kconfig"
1249
1250 config SMP
1251         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1252         depends on EXPERIMENTAL
1253         depends on GENERIC_CLOCKEVENTS
1254         depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
1255                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
1256                  ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
1257                  ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
1258         select USE_GENERIC_SMP_HELPERS
1259         select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
1260         help
1261           This enables support for systems with more than one CPU. If you have
1262           a system with only one CPU, like most personal computers, say N. If
1263           you have a system with more than one CPU, say Y.
1264
1265           If you say N here, the kernel will run on single and multiprocessor
1266           machines, but will use only one CPU of a multiprocessor machine. If
1267           you say Y here, the kernel will run on many, but not all, single
1268           processor machines. On a single processor machine, the kernel will
1269           run faster if you say N here.
1270
1271           See also <file:Documentation/i386/IO-APIC.txt>,
1272           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1273           <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1274
1275           If you don't know what to do here, say N.
1276
1277 config SMP_ON_UP
1278         bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1279         depends on EXPERIMENTAL
1280         depends on SMP && !XIP_KERNEL
1281         default y
1282         help
1283           SMP kernels contain instructions which fail on non-SMP processors.
1284           Enabling this option allows the kernel to modify itself to make
1285           these instructions safe.  Disabling it allows about 1K of space
1286           savings.
1287
1288           If you don't know what to do here, say Y.
1289
1290 config HAVE_ARM_SCU
1291         bool
1292         depends on SMP
1293         help
1294           This option enables support for the ARM system coherency unit
1295
1296 config HAVE_ARM_TWD
1297         bool
1298         depends on SMP
1299         select TICK_ONESHOT
1300         help
1301           This options enables support for the ARM timer and watchdog unit
1302
1303 choice
1304         prompt "Memory split"
1305         default VMSPLIT_3G
1306         help
1307           Select the desired split between kernel and user memory.
1308
1309           If you are not absolutely sure what you are doing, leave this
1310           option alone!
1311
1312         config VMSPLIT_3G
1313                 bool "3G/1G user/kernel split"
1314         config VMSPLIT_2G
1315                 bool "2G/2G user/kernel split"
1316         config VMSPLIT_1G
1317                 bool "1G/3G user/kernel split"
1318 endchoice
1319
1320 config PAGE_OFFSET
1321         hex
1322         default 0x40000000 if VMSPLIT_1G
1323         default 0x80000000 if VMSPLIT_2G
1324         default 0xC0000000
1325
1326 config NR_CPUS
1327         int "Maximum number of CPUs (2-32)"
1328         range 2 32
1329         depends on SMP
1330         default "4"
1331
1332 config HOTPLUG_CPU
1333         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1334         depends on SMP && HOTPLUG && EXPERIMENTAL
1335         depends on !ARCH_MSM
1336         help
1337           Say Y here to experiment with turning CPUs off and on.  CPUs
1338           can be controlled through /sys/devices/system/cpu.
1339
1340 config LOCAL_TIMERS
1341         bool "Use local timer interrupts"
1342         depends on SMP
1343         default y
1344         select HAVE_ARM_TWD if !ARCH_MSM_SCORPIONMP
1345         help
1346           Enable support for local timers on SMP platforms, rather then the
1347           legacy IPI broadcast method.  Local timers allows the system
1348           accounting to be spread across the timer interval, preventing a
1349           "thundering herd" at every timer tick.
1350
1351 source kernel/Kconfig.preempt
1352
1353 config HZ
1354         int
1355         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
1356                 ARCH_S5P6442 || ARCH_S5PV210 || ARCH_S5PV310
1357         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1358         default AT91_TIMER_HZ if ARCH_AT91
1359         default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1360         default 100
1361
1362 config THUMB2_KERNEL
1363         bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
1364         depends on CPU_V7 && !CPU_V6 && EXPERIMENTAL
1365         select AEABI
1366         select ARM_ASM_UNIFIED
1367         help
1368           By enabling this option, the kernel will be compiled in
1369           Thumb-2 mode. A compiler/assembler that understand the unified
1370           ARM-Thumb syntax is needed.
1371
1372           If unsure, say N.
1373
1374 config ARM_ASM_UNIFIED
1375         bool
1376
1377 config AEABI
1378         bool "Use the ARM EABI to compile the kernel"
1379         help
1380           This option allows for the kernel to be compiled using the latest
1381           ARM ABI (aka EABI).  This is only useful if you are using a user
1382           space environment that is also compiled with EABI.
1383
1384           Since there are major incompatibilities between the legacy ABI and
1385           EABI, especially with regard to structure member alignment, this
1386           option also changes the kernel syscall calling convention to
1387           disambiguate both ABIs and allow for backward compatibility support
1388           (selected with CONFIG_OABI_COMPAT).
1389
1390           To use this you need GCC version 4.0.0 or later.
1391
1392 config OABI_COMPAT
1393         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1394         depends on AEABI && EXPERIMENTAL
1395         default y
1396         help
1397           This option preserves the old syscall interface along with the
1398           new (ARM EABI) one. It also provides a compatibility layer to
1399           intercept syscalls that have structure arguments which layout
1400           in memory differs between the legacy ABI and the new ARM EABI
1401           (only for non "thumb" binaries). This option adds a tiny
1402           overhead to all syscalls and produces a slightly larger kernel.
1403           If you know you'll be using only pure EABI user space then you
1404           can say N here. If this option is not selected and you attempt
1405           to execute a legacy ABI binary then the result will be
1406           UNPREDICTABLE (in fact it can be predicted that it won't work
1407           at all). If in doubt say Y.
1408
1409 config ARCH_HAS_HOLES_MEMORYMODEL
1410         bool
1411
1412 config ARCH_SPARSEMEM_ENABLE
1413         bool
1414
1415 config ARCH_SPARSEMEM_DEFAULT
1416         def_bool ARCH_SPARSEMEM_ENABLE
1417
1418 config ARCH_SELECT_MEMORY_MODEL
1419         def_bool ARCH_SPARSEMEM_ENABLE
1420
1421 config HIGHMEM
1422         bool "High Memory Support (EXPERIMENTAL)"
1423         depends on MMU && EXPERIMENTAL
1424         help
1425           The address space of ARM processors is only 4 Gigabytes large
1426           and it has to accommodate user address space, kernel address
1427           space as well as some memory mapped IO. That means that, if you
1428           have a large amount of physical memory and/or IO, not all of the
1429           memory can be "permanently mapped" by the kernel. The physical
1430           memory that is not permanently mapped is called "high memory".
1431
1432           Depending on the selected kernel/user memory split, minimum
1433           vmalloc space and actual amount of RAM, you may not need this
1434           option which should result in a slightly faster kernel.
1435
1436           If unsure, say n.
1437
1438 config HIGHPTE
1439         bool "Allocate 2nd-level pagetables from highmem"
1440         depends on HIGHMEM
1441         depends on !OUTER_CACHE
1442
1443 config HW_PERF_EVENTS
1444         bool "Enable hardware performance counter support for perf events"
1445         depends on PERF_EVENTS && CPU_HAS_PMU
1446         default y
1447         help
1448           Enable hardware performance counter support for perf events. If
1449           disabled, perf events will use software events only.
1450
1451 source "mm/Kconfig"
1452
1453 config FORCE_MAX_ZONEORDER
1454         int "Maximum zone order" if ARCH_SHMOBILE
1455         range 11 64 if ARCH_SHMOBILE
1456         default "9" if SA1111
1457         default "11"
1458         help
1459           The kernel memory allocator divides physically contiguous memory
1460           blocks into "zones", where each zone is a power of two number of
1461           pages.  This option selects the largest power of two that the kernel
1462           keeps in the memory allocator.  If you need to allocate very large
1463           blocks of physically contiguous memory, then you may need to
1464           increase this value.
1465
1466           This config option is actually maximum order plus one. For example,
1467           a value of 11 means that the largest free memory block is 2^10 pages.
1468
1469 config LEDS
1470         bool "Timer and CPU usage LEDs"
1471         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1472                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1473                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1474                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1475                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1476                    ARCH_AT91 || ARCH_DAVINCI || \
1477                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1478         help
1479           If you say Y here, the LEDs on your machine will be used
1480           to provide useful information about your current system status.
1481
1482           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1483           be able to select which LEDs are active using the options below. If
1484           you are compiling a kernel for the EBSA-110 or the LART however, the
1485           red LED will simply flash regularly to indicate that the system is
1486           still functional. It is safe to say Y here if you have a CATS
1487           system, but the driver will do nothing.
1488
1489 config LEDS_TIMER
1490         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1491                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1492                             || MACH_OMAP_PERSEUS2
1493         depends on LEDS
1494         depends on !GENERIC_CLOCKEVENTS
1495         default y if ARCH_EBSA110
1496         help
1497           If you say Y here, one of the system LEDs (the green one on the
1498           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1499           will flash regularly to indicate that the system is still
1500           operational. This is mainly useful to kernel hackers who are
1501           debugging unstable kernels.
1502
1503           The LART uses the same LED for both Timer LED and CPU usage LED
1504           functions. You may choose to use both, but the Timer LED function
1505           will overrule the CPU usage LED.
1506
1507 config LEDS_CPU
1508         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1509                         !ARCH_OMAP) \
1510                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1511                         || MACH_OMAP_PERSEUS2
1512         depends on LEDS
1513         help
1514           If you say Y here, the red LED will be used to give a good real
1515           time indication of CPU usage, by lighting whenever the idle task
1516           is not currently executing.
1517
1518           The LART uses the same LED for both Timer LED and CPU usage LED
1519           functions. You may choose to use both, but the Timer LED function
1520           will overrule the CPU usage LED.
1521
1522 config ALIGNMENT_TRAP
1523         bool
1524         depends on CPU_CP15_MMU
1525         default y if !ARCH_EBSA110
1526         select HAVE_PROC_CPU if PROC_FS
1527         help
1528           ARM processors cannot fetch/store information which is not
1529           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1530           address divisible by 4. On 32-bit ARM processors, these non-aligned
1531           fetch/store instructions will be emulated in software if you say
1532           here, which has a severe performance impact. This is necessary for
1533           correct operation of some network protocols. With an IP-only
1534           configuration it is safe to say N, otherwise say Y.
1535
1536 config UACCESS_WITH_MEMCPY
1537         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1538         depends on MMU && EXPERIMENTAL
1539         default y if CPU_FEROCEON
1540         help
1541           Implement faster copy_to_user and clear_user methods for CPU
1542           cores where a 8-word STM instruction give significantly higher
1543           memory write throughput than a sequence of individual 32bit stores.
1544
1545           A possible side effect is a slight increase in scheduling latency
1546           between threads sharing the same address space if they invoke
1547           such copy operations with large buffers.
1548
1549           However, if the CPU data cache is using a write-allocate mode,
1550           this option is unlikely to provide any performance gain.
1551
1552 config SECCOMP
1553         bool
1554         prompt "Enable seccomp to safely compute untrusted bytecode"
1555         ---help---
1556           This kernel feature is useful for number crunching applications
1557           that may need to compute untrusted bytecode during their
1558           execution. By using pipes or other transports made available to
1559           the process as file descriptors supporting the read/write
1560           syscalls, it's possible to isolate those applications in
1561           their own address space using seccomp. Once seccomp is
1562           enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1563           and the task is only allowed to execute a few safe syscalls
1564           defined by each seccomp mode.
1565
1566 config CC_STACKPROTECTOR
1567         bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1568         depends on EXPERIMENTAL
1569         help
1570           This option turns on the -fstack-protector GCC feature. This
1571           feature puts, at the beginning of functions, a canary value on
1572           the stack just before the return address, and validates
1573           the value just before actually returning.  Stack based buffer
1574           overflows (that need to overwrite this return address) now also
1575           overwrite the canary, which gets detected and the attack is then
1576           neutralized via a kernel panic.
1577           This feature requires gcc version 4.2 or above.
1578
1579 config DEPRECATED_PARAM_STRUCT
1580         bool "Provide old way to pass kernel parameters"
1581         help
1582           This was deprecated in 2001 and announced to live on for 5 years.
1583           Some old boot loaders still use this way.
1584
1585 endmenu
1586
1587 menu "Boot options"
1588
1589 # Compressed boot loader in ROM.  Yes, we really want to ask about
1590 # TEXT and BSS so we preserve their values in the config files.
1591 config ZBOOT_ROM_TEXT
1592         hex "Compressed ROM boot loader base address"
1593         default "0"
1594         help
1595           The physical address at which the ROM-able zImage is to be
1596           placed in the target.  Platforms which normally make use of
1597           ROM-able zImage formats normally set this to a suitable
1598           value in their defconfig file.
1599
1600           If ZBOOT_ROM is not enabled, this has no effect.
1601
1602 config ZBOOT_ROM_BSS
1603         hex "Compressed ROM boot loader BSS address"
1604         default "0"
1605         help
1606           The base address of an area of read/write memory in the target
1607           for the ROM-able zImage which must be available while the
1608           decompressor is running. It must be large enough to hold the
1609           entire decompressed kernel plus an additional 128 KiB.
1610           Platforms which normally make use of ROM-able zImage formats
1611           normally set this to a suitable value in their defconfig file.
1612
1613           If ZBOOT_ROM is not enabled, this has no effect.
1614
1615 config ZBOOT_ROM
1616         bool "Compressed boot loader in ROM/flash"
1617         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1618         help
1619           Say Y here if you intend to execute your compressed kernel image
1620           (zImage) directly from ROM or flash.  If unsure, say N.
1621
1622 config CMDLINE
1623         string "Default kernel command string"
1624         default ""
1625         help
1626           On some architectures (EBSA110 and CATS), there is currently no way
1627           for the boot loader to pass arguments to the kernel. For these
1628           architectures, you should supply some command-line options at build
1629           time by entering them here. As a minimum, you should specify the
1630           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1631
1632 config CMDLINE_FORCE
1633         bool "Always use the default kernel command string"
1634         depends on CMDLINE != ""
1635         help
1636           Always use the default kernel command string, even if the boot
1637           loader passes other arguments to the kernel.
1638           This is useful if you cannot or don't want to change the
1639           command-line options your boot loader passes to the kernel.
1640
1641           If unsure, say N.
1642
1643 config XIP_KERNEL
1644         bool "Kernel Execute-In-Place from ROM"
1645         depends on !ZBOOT_ROM
1646         help
1647           Execute-In-Place allows the kernel to run from non-volatile storage
1648           directly addressable by the CPU, such as NOR flash. This saves RAM
1649           space since the text section of the kernel is not loaded from flash
1650           to RAM.  Read-write sections, such as the data section and stack,
1651           are still copied to RAM.  The XIP kernel is not compressed since
1652           it has to run directly from flash, so it will take more space to
1653           store it.  The flash address used to link the kernel object files,
1654           and for storing it, is configuration dependent. Therefore, if you
1655           say Y here, you must know the proper physical address where to
1656           store the kernel image depending on your own flash memory usage.
1657
1658           Also note that the make target becomes "make xipImage" rather than
1659           "make zImage" or "make Image".  The final kernel binary to put in
1660           ROM memory will be arch/arm/boot/xipImage.
1661
1662           If unsure, say N.
1663
1664 config XIP_PHYS_ADDR
1665         hex "XIP Kernel Physical Location"
1666         depends on XIP_KERNEL
1667         default "0x00080000"
1668         help
1669           This is the physical address in your flash memory the kernel will
1670           be linked for and stored to.  This address is dependent on your
1671           own flash usage.
1672
1673 config KEXEC
1674         bool "Kexec system call (EXPERIMENTAL)"
1675         depends on EXPERIMENTAL
1676         help
1677           kexec is a system call that implements the ability to shutdown your
1678           current kernel, and to start another kernel.  It is like a reboot
1679           but it is independent of the system firmware.   And like a reboot
1680           you can start any kernel with it, not just Linux.
1681
1682           It is an ongoing process to be certain the hardware in a machine
1683           is properly shutdown, so do not be surprised if this code does not
1684           initially work for you.  It may help to enable device hotplugging
1685           support.
1686
1687 config ATAGS_PROC
1688         bool "Export atags in procfs"
1689         depends on KEXEC
1690         default y
1691         help
1692           Should the atags used to boot the kernel be exported in an "atags"
1693           file in procfs. Useful with kexec.
1694
1695 config CRASH_DUMP
1696         bool "Build kdump crash kernel (EXPERIMENTAL)"
1697         depends on EXPERIMENTAL
1698         help
1699           Generate crash dump after being started by kexec. This should
1700           be normally only set in special crash dump kernels which are
1701           loaded in the main kernel with kexec-tools into a specially
1702           reserved region and then later executed after a crash by
1703           kdump/kexec. The crash dump kernel must be compiled to a
1704           memory address not used by the main kernel
1705
1706           For more details see Documentation/kdump/kdump.txt
1707
1708 config AUTO_ZRELADDR
1709         bool "Auto calculation of the decompressed kernel image address"
1710         depends on !ZBOOT_ROM && !ARCH_U300
1711         help
1712           ZRELADDR is the physical address where the decompressed kernel
1713           image will be placed. If AUTO_ZRELADDR is selected, the address
1714           will be determined at run-time by masking the current IP with
1715           0xf8000000. This assumes the zImage being placed in the first 128MB
1716           from start of memory.
1717
1718 endmenu
1719
1720 menu "CPU Power Management"
1721
1722 if ARCH_HAS_CPUFREQ
1723
1724 source "drivers/cpufreq/Kconfig"
1725
1726 config CPU_FREQ_IMX
1727         tristate "CPUfreq driver for i.MX CPUs"
1728         depends on ARCH_MXC && CPU_FREQ
1729         help
1730           This enables the CPUfreq driver for i.MX CPUs.
1731
1732 config CPU_FREQ_SA1100
1733         bool
1734
1735 config CPU_FREQ_SA1110
1736         bool
1737
1738 config CPU_FREQ_INTEGRATOR
1739         tristate "CPUfreq driver for ARM Integrator CPUs"
1740         depends on ARCH_INTEGRATOR && CPU_FREQ
1741         default y
1742         help
1743           This enables the CPUfreq driver for ARM Integrator CPUs.
1744
1745           For details, take a look at <file:Documentation/cpu-freq>.
1746
1747           If in doubt, say Y.
1748
1749 config CPU_FREQ_PXA
1750         bool
1751         depends on CPU_FREQ && ARCH_PXA && PXA25x
1752         default y
1753         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1754
1755 config CPU_FREQ_S3C64XX
1756         bool "CPUfreq support for Samsung S3C64XX CPUs"
1757         depends on CPU_FREQ && CPU_S3C6410
1758
1759 config CPU_FREQ_S3C
1760         bool
1761         help
1762           Internal configuration node for common cpufreq on Samsung SoC
1763
1764 config CPU_FREQ_S3C24XX
1765         bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
1766         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1767         select CPU_FREQ_S3C
1768         help
1769           This enables the CPUfreq driver for the Samsung S3C24XX family
1770           of CPUs.
1771
1772           For details, take a look at <file:Documentation/cpu-freq>.
1773
1774           If in doubt, say N.
1775
1776 config CPU_FREQ_S3C24XX_PLL
1777         bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
1778         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1779         help
1780           Compile in support for changing the PLL frequency from the
1781           S3C24XX series CPUfreq driver. The PLL takes time to settle
1782           after a frequency change, so by default it is not enabled.
1783
1784           This also means that the PLL tables for the selected CPU(s) will
1785           be built which may increase the size of the kernel image.
1786
1787 config CPU_FREQ_S3C24XX_DEBUG
1788         bool "Debug CPUfreq Samsung driver core"
1789         depends on CPU_FREQ_S3C24XX
1790         help
1791           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1792
1793 config CPU_FREQ_S3C24XX_IODEBUG
1794         bool "Debug CPUfreq Samsung driver IO timing"
1795         depends on CPU_FREQ_S3C24XX
1796         help
1797           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1798
1799 config CPU_FREQ_S3C24XX_DEBUGFS
1800         bool "Export debugfs for CPUFreq"
1801         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1802         help
1803           Export status information via debugfs.
1804
1805 endif
1806
1807 source "drivers/cpuidle/Kconfig"
1808
1809 endmenu
1810
1811 menu "Floating point emulation"
1812
1813 comment "At least one emulation must be selected"
1814
1815 config FPE_NWFPE
1816         bool "NWFPE math emulation"
1817         depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
1818         ---help---
1819           Say Y to include the NWFPE floating point emulator in the kernel.
1820           This is necessary to run most binaries. Linux does not currently
1821           support floating point hardware so you need to say Y here even if
1822           your machine has an FPA or floating point co-processor podule.
1823
1824           You may say N here if you are going to load the Acorn FPEmulator
1825           early in the bootup.
1826
1827 config FPE_NWFPE_XP
1828         bool "Support extended precision"
1829         depends on FPE_NWFPE
1830         help
1831           Say Y to include 80-bit support in the kernel floating-point
1832           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1833           Note that gcc does not generate 80-bit operations by default,
1834           so in most cases this option only enlarges the size of the
1835           floating point emulator without any good reason.
1836
1837           You almost surely want to say N here.
1838
1839 config FPE_FASTFPE
1840         bool "FastFPE math emulation (EXPERIMENTAL)"
1841         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1842         ---help---
1843           Say Y here to include the FAST floating point emulator in the kernel.
1844           This is an experimental much faster emulator which now also has full
1845           precision for the mantissa.  It does not support any exceptions.
1846           It is very simple, and approximately 3-6 times faster than NWFPE.
1847
1848           It should be sufficient for most programs.  It may be not suitable
1849           for scientific calculations, but you have to check this for yourself.
1850           If you do not feel you need a faster FP emulation you should better
1851           choose NWFPE.
1852
1853 config VFP
1854         bool "VFP-format floating point maths"
1855         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1856         help
1857           Say Y to include VFP support code in the kernel. This is needed
1858           if your hardware includes a VFP unit.
1859
1860           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1861           release notes and additional status information.
1862
1863           Say N if your target does not have VFP hardware.
1864
1865 config VFPv3
1866         bool
1867         depends on VFP
1868         default y if CPU_V7
1869
1870 config NEON
1871         bool "Advanced SIMD (NEON) Extension support"
1872         depends on VFPv3 && CPU_V7
1873         help
1874           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1875           Extension.
1876
1877 endmenu
1878
1879 menu "Userspace binary formats"
1880
1881 source "fs/Kconfig.binfmt"
1882
1883 config ARTHUR
1884         tristate "RISC OS personality"
1885         depends on !AEABI
1886         help
1887           Say Y here to include the kernel code necessary if you want to run
1888           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1889           experimental; if this sounds frightening, say N and sleep in peace.
1890           You can also say M here to compile this support as a module (which
1891           will be called arthur).
1892
1893 endmenu
1894
1895 menu "Power management options"
1896
1897 source "kernel/power/Kconfig"
1898
1899 config ARCH_SUSPEND_POSSIBLE
1900         def_bool y
1901
1902 endmenu
1903
1904 source "net/Kconfig"
1905
1906 source "drivers/Kconfig"
1907
1908 source "fs/Kconfig"
1909
1910 source "arch/arm/Kconfig.debug"
1911
1912 source "security/Kconfig"
1913
1914 source "crypto/Kconfig"
1915
1916 source "lib/Kconfig"