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 GENERIC_CLOCKEVENTS
 770         select HAVE_S3C_RTC if RTC_CLASS
 771         select HAVE_S3C2410_I2C if I2C
 772         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 773         help
 774           Samsung S5PV310 series based systems
 775
 776 config ARCH_SHARK
 777         bool "Shark"
 778         select CPU_SA110
 779         select ISA
 780         select ISA_DMA
 781         select ZONE_DMA
 782         select PCI
 783         select ARCH_USES_GETTIMEOFFSET
 784         help
 785           Support for the StrongARM based Digital DNARD machine, also known
 786           as "Shark" (<http://www.shark-linux.de/shark.html>).
 787
 788 config ARCH_TCC_926
 789         bool "Telechips TCC ARM926-based systems"
 790         select CPU_ARM926T
 791         select HAVE_CLK
 792         select CLKDEV_LOOKUP
 793         select GENERIC_CLOCKEVENTS
 794         help
 795           Support for Telechips TCC ARM926-based systems.
 796
 797 config ARCH_LH7A40X
 798         bool "Sharp LH7A40X"
 799         select CPU_ARM922T
 800         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 801         select ARCH_USES_GETTIMEOFFSET
 802         help
 803           Say Y here for systems based on one of the Sharp LH7A40X
 804           System on a Chip processors.  These CPUs include an ARM922T
 805           core with a wide array of integrated devices for
 806           hand-held and low-power applications.
 807
 808 config ARCH_U300
 809         bool "ST-Ericsson U300 Series"
 810         depends on MMU
 811         select CPU_ARM926T
 812         select HAVE_SCHED_CLOCK
 813         select HAVE_TCM
 814         select ARM_AMBA
 815         select ARM_VIC
 816         select GENERIC_CLOCKEVENTS
 817         select CLKDEV_LOOKUP
 818         select GENERIC_GPIO
 819         help
 820           Support for ST-Ericsson U300 series mobile platforms.
 821
 822 config ARCH_U8500
 823         bool "ST-Ericsson U8500 Series"
 824         select CPU_V7
 825         select ARM_AMBA
 826         select GENERIC_CLOCKEVENTS
 827         select CLKDEV_LOOKUP
 828         select ARCH_REQUIRE_GPIOLIB
 829         select ARCH_HAS_CPUFREQ
 830         help
 831           Support for ST-Ericsson's Ux500 architecture
 832
 833 config ARCH_NOMADIK
 834         bool "STMicroelectronics Nomadik"
 835         select ARM_AMBA
 836         select ARM_VIC
 837         select CPU_ARM926T
 838         select CLKDEV_LOOKUP
 839         select GENERIC_CLOCKEVENTS
 840         select ARCH_REQUIRE_GPIOLIB
 841         help
 842           Support for the Nomadik platform by ST-Ericsson
 843
 844 config ARCH_DAVINCI
 845         bool "TI DaVinci"
 846         select GENERIC_CLOCKEVENTS
 847         select ARCH_REQUIRE_GPIOLIB
 848         select ZONE_DMA
 849         select HAVE_IDE
 850         select CLKDEV_LOOKUP
 851         select GENERIC_ALLOCATOR
 852         select ARCH_HAS_HOLES_MEMORYMODEL
 853         help
 854           Support for TI's DaVinci platform.
 855
 856 config ARCH_OMAP
 857         bool "TI OMAP"
 858         select HAVE_CLK
 859         select ARCH_REQUIRE_GPIOLIB
 860         select ARCH_HAS_CPUFREQ
 861         select GENERIC_CLOCKEVENTS
 862         select HAVE_SCHED_CLOCK
 863         select ARCH_HAS_HOLES_MEMORYMODEL
 864         help
 865           Support for TI's OMAP platform (OMAP1/2/3/4).
 866
 867 config PLAT_SPEAR
 868         bool "ST SPEAr"
 869         select ARM_AMBA
 870         select ARCH_REQUIRE_GPIOLIB
 871         select CLKDEV_LOOKUP
 872         select GENERIC_CLOCKEVENTS
 873         select HAVE_CLK
 874         help
 875           Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
 876
 877 endchoice
 878
 879 #
 880 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 881 # Kconfigs may be included either alphabetically (according to the
 882 # plat- suffix) or along side the corresponding mach-* source.
 883 #
 884 source "arch/arm/mach-aaec2000/Kconfig"
 885
 886 source "arch/arm/mach-at91/Kconfig"
 887
 888 source "arch/arm/mach-bcmring/Kconfig"
 889
 890 source "arch/arm/mach-clps711x/Kconfig"
 891
 892 source "arch/arm/mach-cns3xxx/Kconfig"
 893
 894 source "arch/arm/mach-davinci/Kconfig"
 895
 896 source "arch/arm/mach-dove/Kconfig"
 897
 898 source "arch/arm/mach-ep93xx/Kconfig"
 899
 900 source "arch/arm/mach-footbridge/Kconfig"
 901
 902 source "arch/arm/mach-gemini/Kconfig"
 903
 904 source "arch/arm/mach-h720x/Kconfig"
 905
 906 source "arch/arm/mach-integrator/Kconfig"
 907
 908 source "arch/arm/mach-iop32x/Kconfig"
 909
 910 source "arch/arm/mach-iop33x/Kconfig"
 911
 912 source "arch/arm/mach-iop13xx/Kconfig"
 913
 914 source "arch/arm/mach-ixp4xx/Kconfig"
 915
 916 source "arch/arm/mach-ixp2000/Kconfig"
 917
 918 source "arch/arm/mach-ixp23xx/Kconfig"
 919
 920 source "arch/arm/mach-kirkwood/Kconfig"
 921
 922 source "arch/arm/mach-ks8695/Kconfig"
 923
 924 source "arch/arm/mach-lh7a40x/Kconfig"
 925
 926 source "arch/arm/mach-loki/Kconfig"
 927
 928 source "arch/arm/mach-lpc32xx/Kconfig"
 929
 930 source "arch/arm/mach-msm/Kconfig"
 931
 932 source "arch/arm/mach-mv78xx0/Kconfig"
 933
 934 source "arch/arm/plat-mxc/Kconfig"
 935
 936 source "arch/arm/mach-mxs/Kconfig"
 937
 938 source "arch/arm/mach-netx/Kconfig"
 939
 940 source "arch/arm/mach-nomadik/Kconfig"
 941 source "arch/arm/plat-nomadik/Kconfig"
 942
 943 source "arch/arm/mach-ns9xxx/Kconfig"
 944
 945 source "arch/arm/mach-nuc93x/Kconfig"
 946
 947 source "arch/arm/plat-omap/Kconfig"
 948
 949 source "arch/arm/mach-omap1/Kconfig"
 950
 951 source "arch/arm/mach-omap2/Kconfig"
 952
 953 source "arch/arm/mach-orion5x/Kconfig"
 954
 955 source "arch/arm/mach-pxa/Kconfig"
 956 source "arch/arm/plat-pxa/Kconfig"
 957
 958 source "arch/arm/mach-mmp/Kconfig"
 959
 960 source "arch/arm/mach-realview/Kconfig"
 961
 962 source "arch/arm/mach-sa1100/Kconfig"
 963
 964 source "arch/arm/plat-samsung/Kconfig"
 965 source "arch/arm/plat-s3c24xx/Kconfig"
 966 source "arch/arm/plat-s5p/Kconfig"
 967
 968 source "arch/arm/plat-spear/Kconfig"
 969
 970 source "arch/arm/plat-tcc/Kconfig"
 971
 972 if ARCH_S3C2410
 973 source "arch/arm/mach-s3c2400/Kconfig"
 974 source "arch/arm/mach-s3c2410/Kconfig"
 975 source "arch/arm/mach-s3c2412/Kconfig"
 976 source "arch/arm/mach-s3c2416/Kconfig"
 977 source "arch/arm/mach-s3c2440/Kconfig"
 978 source "arch/arm/mach-s3c2443/Kconfig"
 979 endif
 980
 981 if ARCH_S3C64XX
 982 source "arch/arm/mach-s3c64xx/Kconfig"
 983 endif
 984
 985 source "arch/arm/mach-s5p64x0/Kconfig"
 986
 987 source "arch/arm/mach-s5p6442/Kconfig"
 988
 989 source "arch/arm/mach-s5pc100/Kconfig"
 990
 991 source "arch/arm/mach-s5pv210/Kconfig"
 992
 993 source "arch/arm/mach-s5pv310/Kconfig"
 994
 995 source "arch/arm/mach-shmobile/Kconfig"
 996
 997 source "arch/arm/plat-stmp3xxx/Kconfig"
 998
 999 source "arch/arm/mach-tegra/Kconfig"
1000
1001 source "arch/arm/mach-u300/Kconfig"
1002
1003 source "arch/arm/mach-ux500/Kconfig"
1004
1005 source "arch/arm/mach-versatile/Kconfig"
1006
1007 source "arch/arm/mach-vexpress/Kconfig"
1008
1009 source "arch/arm/mach-w90x900/Kconfig"
1010
1011 # Definitions to make life easier
1012 config ARCH_ACORN
1013         bool
1014
1015 config PLAT_IOP
1016         bool
1017         select GENERIC_CLOCKEVENTS
1018         select HAVE_SCHED_CLOCK
1019
1020 config PLAT_ORION
1021         bool
1022         select HAVE_SCHED_CLOCK
1023
1024 config PLAT_PXA
1025         bool
1026
1027 config PLAT_VERSATILE
1028         bool
1029
1030 config ARM_TIMER_SP804
1031         bool
1032
1033 source arch/arm/mm/Kconfig
1034
1035 config IWMMXT
1036         bool "Enable iWMMXt support"
1037         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1038         default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
1039         help
1040           Enable support for iWMMXt context switching at run time if
1041           running on a CPU that supports it.
1042
1043 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
1044 config XSCALE_PMU
1045         bool
1046         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
1047         default y
1048
1049 config CPU_HAS_PMU
1050         depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
1051                    (!ARCH_OMAP3 || OMAP3_EMU)
1052         default y
1053         bool
1054
1055 config MULTI_IRQ_HANDLER
1056         bool
1057         help
1058           Allow each machine to specify it's own IRQ handler at run time.
1059
1060 if !MMU
1061 source "arch/arm/Kconfig-nommu"
1062 endif
1063
1064 config ARM_ERRATA_411920
1065         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1066         depends on CPU_V6
1067         help
1068           Invalidation of the Instruction Cache operation can
1069           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1070           It does not affect the MPCore. This option enables the ARM Ltd.
1071           recommended workaround.
1072
1073 config ARM_ERRATA_430973
1074         bool "ARM errata: Stale prediction on replaced interworking branch"
1075         depends on CPU_V7
1076         help
1077           This option enables the workaround for the 430973 Cortex-A8
1078           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1079           interworking branch is replaced with another code sequence at the
1080           same virtual address, whether due to self-modifying code or virtual
1081           to physical address re-mapping, Cortex-A8 does not recover from the
1082           stale interworking branch prediction. This results in Cortex-A8
1083           executing the new code sequence in the incorrect ARM or Thumb state.
1084           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1085           and also flushes the branch target cache at every context switch.
1086           Note that setting specific bits in the ACTLR register may not be
1087           available in non-secure mode.
1088
1089 config ARM_ERRATA_458693
1090         bool "ARM errata: Processor deadlock when a false hazard is created"
1091         depends on CPU_V7
1092         help
1093           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1094           erratum. For very specific sequences of memory operations, it is
1095           possible for a hazard condition intended for a cache line to instead
1096           be incorrectly associated with a different cache line. This false
1097           hazard might then cause a processor deadlock. The workaround enables
1098           the L1 caching of the NEON accesses and disables the PLD instruction
1099           in the ACTLR register. Note that setting specific bits in the ACTLR
1100           register may not be available in non-secure mode.
1101
1102 config ARM_ERRATA_460075
1103         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1104         depends on CPU_V7
1105         help
1106           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1107           erratum. Any asynchronous access to the L2 cache may encounter a
1108           situation in which recent store transactions to the L2 cache are lost
1109           and overwritten with stale memory contents from external memory. The
1110           workaround disables the write-allocate mode for the L2 cache via the
1111           ACTLR register. Note that setting specific bits in the ACTLR register
1112           may not be available in non-secure mode.
1113
1114 config ARM_ERRATA_742230
1115         bool "ARM errata: DMB operation may be faulty"
1116         depends on CPU_V7 && SMP
1117         help
1118           This option enables the workaround for the 742230 Cortex-A9
1119           (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1120           between two write operations may not ensure the correct visibility
1121           ordering of the two writes. This workaround sets a specific bit in
1122           the diagnostic register of the Cortex-A9 which causes the DMB
1123           instruction to behave as a DSB, ensuring the correct behaviour of
1124           the two writes.
1125
1126 config ARM_ERRATA_742231
1127         bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1128         depends on CPU_V7 && SMP
1129         help
1130           This option enables the workaround for the 742231 Cortex-A9
1131           (r2p0..r2p2) erratum. Under certain conditions, specific to the
1132           Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1133           accessing some data located in the same cache line, may get corrupted
1134           data due to bad handling of the address hazard when the line gets
1135           replaced from one of the CPUs at the same time as another CPU is
1136           accessing it. This workaround sets specific bits in the diagnostic
1137           register of the Cortex-A9 which reduces the linefill issuing
1138           capabilities of the processor.
1139
1140 config PL310_ERRATA_588369
1141         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1142         depends on CACHE_L2X0 && ARCH_OMAP4
1143         help
1144            The PL310 L2 cache controller implements three types of Clean &
1145            Invalidate maintenance operations: by Physical Address
1146            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1147            They are architecturally defined to behave as the execution of a
1148            clean operation followed immediately by an invalidate operation,
1149            both performing to the same memory location. This functionality
1150            is not correctly implemented in PL310 as clean lines are not
1151            invalidated as a result of these operations. Note that this errata
1152            uses Texas Instrument's secure monitor api.
1153
1154 config ARM_ERRATA_720789
1155         bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1156         depends on CPU_V7 && SMP
1157         help
1158           This option enables the workaround for the 720789 Cortex-A9 (prior to
1159           r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1160           broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1161           As a consequence of this erratum, some TLB entries which should be
1162           invalidated are not, resulting in an incoherency in the system page
1163           tables. The workaround changes the TLB flushing routines to invalidate
1164           entries regardless of the ASID.
1165
1166 config ARM_ERRATA_743622
1167         bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1168         depends on CPU_V7
1169         help
1170           This option enables the workaround for the 743622 Cortex-A9
1171           (r2p0..r2p2) erratum. Under very rare conditions, a faulty
1172           optimisation in the Cortex-A9 Store Buffer may lead to data
1173           corruption. This workaround sets a specific bit in the diagnostic
1174           register of the Cortex-A9 which disables the Store Buffer
1175           optimisation, preventing the defect from occurring. This has no
1176           visible impact on the overall performance or power consumption of the
1177           processor.
1178
1179 endmenu
1180
1181 source "arch/arm/common/Kconfig"
1182
1183 menu "Bus support"
1184
1185 config ARM_AMBA
1186         bool
1187
1188 config ISA
1189         bool
1190         help
1191           Find out whether you have ISA slots on your motherboard.  ISA is the
1192           name of a bus system, i.e. the way the CPU talks to the other stuff
1193           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1194           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1195           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1196
1197 # Select ISA DMA controller support
1198 config ISA_DMA
1199         bool
1200         select ISA_DMA_API
1201
1202 # Select ISA DMA interface
1203 config ISA_DMA_API
1204         bool
1205
1206 config PCI
1207         bool "PCI support" if MIGHT_HAVE_PCI
1208         help
1209           Find out whether you have a PCI motherboard. PCI is the name of a
1210           bus system, i.e. the way the CPU talks to the other stuff inside
1211           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1212           VESA. If you have PCI, say Y, otherwise N.
1213
1214 config PCI_DOMAINS
1215         bool
1216         depends on PCI
1217
1218 config PCI_NANOENGINE
1219         bool "BSE nanoEngine PCI support"
1220         depends on SA1100_NANOENGINE
1221         help
1222           Enable PCI on the BSE nanoEngine board.
1223
1224 config PCI_SYSCALL
1225         def_bool PCI
1226
1227 # Select the host bridge type
1228 config PCI_HOST_VIA82C505
1229         bool
1230         depends on PCI && ARCH_SHARK
1231         default y
1232
1233 config PCI_HOST_ITE8152
1234         bool
1235         depends on PCI && MACH_ARMCORE
1236         default y
1237         select DMABOUNCE
1238
1239 source "drivers/pci/Kconfig"
1240
1241 source "drivers/pcmcia/Kconfig"
1242
1243 endmenu
1244
1245 menu "Kernel Features"
1246
1247 source "kernel/time/Kconfig"
1248
1249 config SMP
1250         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1251         depends on EXPERIMENTAL
1252         depends on GENERIC_CLOCKEVENTS
1253         depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
1254                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
1255                  ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
1256                  ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
1257         select USE_GENERIC_SMP_HELPERS
1258         select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
1259         help
1260           This enables support for systems with more than one CPU. If you have
1261           a system with only one CPU, like most personal computers, say N. If
1262           you have a system with more than one CPU, say Y.
1263
1264           If you say N here, the kernel will run on single and multiprocessor
1265           machines, but will use only one CPU of a multiprocessor machine. If
1266           you say Y here, the kernel will run on many, but not all, single
1267           processor machines. On a single processor machine, the kernel will
1268           run faster if you say N here.
1269
1270           See also <file:Documentation/i386/IO-APIC.txt>,
1271           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1272           <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1273
1274           If you don't know what to do here, say N.
1275
1276 config SMP_ON_UP
1277         bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1278         depends on EXPERIMENTAL
1279         depends on SMP && !XIP
1280         default y
1281         help
1282           SMP kernels contain instructions which fail on non-SMP processors.
1283           Enabling this option allows the kernel to modify itself to make
1284           these instructions safe.  Disabling it allows about 1K of space
1285           savings.
1286
1287           If you don't know what to do here, say Y.
1288
1289 config HAVE_ARM_SCU
1290         bool
1291         depends on SMP
1292         help
1293           This option enables support for the ARM system coherency unit
1294
1295 config HAVE_ARM_TWD
1296         bool
1297         depends on SMP
1298         select TICK_ONESHOT
1299         help
1300           This options enables support for the ARM timer and watchdog unit
1301
1302 choice
1303         prompt "Memory split"
1304         default VMSPLIT_3G
1305         help
1306           Select the desired split between kernel and user memory.
1307
1308           If you are not absolutely sure what you are doing, leave this
1309           option alone!
1310
1311         config VMSPLIT_3G
1312                 bool "3G/1G user/kernel split"
1313         config VMSPLIT_2G
1314                 bool "2G/2G user/kernel split"
1315         config VMSPLIT_1G
1316                 bool "1G/3G user/kernel split"
1317 endchoice
1318
1319 config PAGE_OFFSET
1320         hex
1321         default 0x40000000 if VMSPLIT_1G
1322         default 0x80000000 if VMSPLIT_2G
1323         default 0xC0000000
1324
1325 config NR_CPUS
1326         int "Maximum number of CPUs (2-32)"
1327         range 2 32
1328         depends on SMP
1329         default "4"
1330
1331 config HOTPLUG_CPU
1332         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1333         depends on SMP && HOTPLUG && EXPERIMENTAL
1334         depends on !ARCH_MSM
1335         help
1336           Say Y here to experiment with turning CPUs off and on.  CPUs
1337           can be controlled through /sys/devices/system/cpu.
1338
1339 config LOCAL_TIMERS
1340         bool "Use local timer interrupts"
1341         depends on SMP
1342         default y
1343         select HAVE_ARM_TWD if !ARCH_MSM_SCORPIONMP
1344         help
1345           Enable support for local timers on SMP platforms, rather then the
1346           legacy IPI broadcast method.  Local timers allows the system
1347           accounting to be spread across the timer interval, preventing a
1348           "thundering herd" at every timer tick.
1349
1350 source kernel/Kconfig.preempt
1351
1352 config HZ
1353         int
1354         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
1355                 ARCH_S5P6442 || ARCH_S5PV210 || ARCH_S5PV310
1356         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1357         default AT91_TIMER_HZ if ARCH_AT91
1358         default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1359         default 100
1360
1361 config THUMB2_KERNEL
1362         bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
1363         depends on CPU_V7 && !CPU_V6 && EXPERIMENTAL
1364         select AEABI
1365         select ARM_ASM_UNIFIED
1366         help
1367           By enabling this option, the kernel will be compiled in
1368           Thumb-2 mode. A compiler/assembler that understand the unified
1369           ARM-Thumb syntax is needed.
1370
1371           If unsure, say N.
1372
1373 config ARM_ASM_UNIFIED
1374         bool
1375
1376 config AEABI
1377         bool "Use the ARM EABI to compile the kernel"
1378         help
1379           This option allows for the kernel to be compiled using the latest
1380           ARM ABI (aka EABI).  This is only useful if you are using a user
1381           space environment that is also compiled with EABI.
1382
1383           Since there are major incompatibilities between the legacy ABI and
1384           EABI, especially with regard to structure member alignment, this
1385           option also changes the kernel syscall calling convention to
1386           disambiguate both ABIs and allow for backward compatibility support
1387           (selected with CONFIG_OABI_COMPAT).
1388
1389           To use this you need GCC version 4.0.0 or later.
1390
1391 config OABI_COMPAT
1392         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1393         depends on AEABI && EXPERIMENTAL
1394         default y
1395         help
1396           This option preserves the old syscall interface along with the
1397           new (ARM EABI) one. It also provides a compatibility layer to
1398           intercept syscalls that have structure arguments which layout
1399           in memory differs between the legacy ABI and the new ARM EABI
1400           (only for non "thumb" binaries). This option adds a tiny
1401           overhead to all syscalls and produces a slightly larger kernel.
1402           If you know you'll be using only pure EABI user space then you
1403           can say N here. If this option is not selected and you attempt
1404           to execute a legacy ABI binary then the result will be
1405           UNPREDICTABLE (in fact it can be predicted that it won't work
1406           at all). If in doubt say Y.
1407
1408 config ARCH_HAS_HOLES_MEMORYMODEL
1409         bool
1410
1411 config ARCH_SPARSEMEM_ENABLE
1412         bool
1413
1414 config ARCH_SPARSEMEM_DEFAULT
1415         def_bool ARCH_SPARSEMEM_ENABLE
1416
1417 config ARCH_SELECT_MEMORY_MODEL
1418         def_bool ARCH_SPARSEMEM_ENABLE
1419
1420 config HIGHMEM
1421         bool "High Memory Support (EXPERIMENTAL)"
1422         depends on MMU && EXPERIMENTAL
1423         help
1424           The address space of ARM processors is only 4 Gigabytes large
1425           and it has to accommodate user address space, kernel address
1426           space as well as some memory mapped IO. That means that, if you
1427           have a large amount of physical memory and/or IO, not all of the
1428           memory can be "permanently mapped" by the kernel. The physical
1429           memory that is not permanently mapped is called "high memory".
1430
1431           Depending on the selected kernel/user memory split, minimum
1432           vmalloc space and actual amount of RAM, you may not need this
1433           option which should result in a slightly faster kernel.
1434
1435           If unsure, say n.
1436
1437 config HIGHPTE
1438         bool "Allocate 2nd-level pagetables from highmem"
1439         depends on HIGHMEM
1440         depends on !OUTER_CACHE
1441
1442 config HW_PERF_EVENTS
1443         bool "Enable hardware performance counter support for perf events"
1444         depends on PERF_EVENTS && CPU_HAS_PMU
1445         default y
1446         help
1447           Enable hardware performance counter support for perf events. If
1448           disabled, perf events will use software events only.
1449
1450 source "mm/Kconfig"
1451
1452 config FORCE_MAX_ZONEORDER
1453         int "Maximum zone order" if ARCH_SHMOBILE
1454         range 11 64 if ARCH_SHMOBILE
1455         default "9" if SA1111
1456         default "11"
1457         help
1458           The kernel memory allocator divides physically contiguous memory
1459           blocks into "zones", where each zone is a power of two number of
1460           pages.  This option selects the largest power of two that the kernel
1461           keeps in the memory allocator.  If you need to allocate very large
1462           blocks of physically contiguous memory, then you may need to
1463           increase this value.
1464
1465           This config option is actually maximum order plus one. For example,
1466           a value of 11 means that the largest free memory block is 2^10 pages.
1467
1468 config LEDS
1469         bool "Timer and CPU usage LEDs"
1470         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1471                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1472                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1473                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1474                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1475                    ARCH_AT91 || ARCH_DAVINCI || \
1476                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1477         help
1478           If you say Y here, the LEDs on your machine will be used
1479           to provide useful information about your current system status.
1480
1481           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1482           be able to select which LEDs are active using the options below. If
1483           you are compiling a kernel for the EBSA-110 or the LART however, the
1484           red LED will simply flash regularly to indicate that the system is
1485           still functional. It is safe to say Y here if you have a CATS
1486           system, but the driver will do nothing.
1487
1488 config LEDS_TIMER
1489         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1490                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1491                             || MACH_OMAP_PERSEUS2
1492         depends on LEDS
1493         depends on !GENERIC_CLOCKEVENTS
1494         default y if ARCH_EBSA110
1495         help
1496           If you say Y here, one of the system LEDs (the green one on the
1497           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1498           will flash regularly to indicate that the system is still
1499           operational. This is mainly useful to kernel hackers who are
1500           debugging unstable kernels.
1501
1502           The LART uses the same LED for both Timer LED and CPU usage LED
1503           functions. You may choose to use both, but the Timer LED function
1504           will overrule the CPU usage LED.
1505
1506 config LEDS_CPU
1507         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1508                         !ARCH_OMAP) \
1509                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1510                         || MACH_OMAP_PERSEUS2
1511         depends on LEDS
1512         help
1513           If you say Y here, the red LED will be used to give a good real
1514           time indication of CPU usage, by lighting whenever the idle task
1515           is not currently executing.
1516
1517           The LART uses the same LED for both Timer LED and CPU usage LED
1518           functions. You may choose to use both, but the Timer LED function
1519           will overrule the CPU usage LED.
1520
1521 config ALIGNMENT_TRAP
1522         bool
1523         depends on CPU_CP15_MMU
1524         default y if !ARCH_EBSA110
1525         select HAVE_PROC_CPU if PROC_FS
1526         help
1527           ARM processors cannot fetch/store information which is not
1528           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1529           address divisible by 4. On 32-bit ARM processors, these non-aligned
1530           fetch/store instructions will be emulated in software if you say
1531           here, which has a severe performance impact. This is necessary for
1532           correct operation of some network protocols. With an IP-only
1533           configuration it is safe to say N, otherwise say Y.
1534
1535 config UACCESS_WITH_MEMCPY
1536         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1537         depends on MMU && EXPERIMENTAL
1538         default y if CPU_FEROCEON
1539         help
1540           Implement faster copy_to_user and clear_user methods for CPU
1541           cores where a 8-word STM instruction give significantly higher
1542           memory write throughput than a sequence of individual 32bit stores.
1543
1544           A possible side effect is a slight increase in scheduling latency
1545           between threads sharing the same address space if they invoke
1546           such copy operations with large buffers.
1547
1548           However, if the CPU data cache is using a write-allocate mode,
1549           this option is unlikely to provide any performance gain.
1550
1551 config SECCOMP
1552         bool
1553         prompt "Enable seccomp to safely compute untrusted bytecode"
1554         ---help---
1555           This kernel feature is useful for number crunching applications
1556           that may need to compute untrusted bytecode during their
1557           execution. By using pipes or other transports made available to
1558           the process as file descriptors supporting the read/write
1559           syscalls, it's possible to isolate those applications in
1560           their own address space using seccomp. Once seccomp is
1561           enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1562           and the task is only allowed to execute a few safe syscalls
1563           defined by each seccomp mode.
1564
1565 config CC_STACKPROTECTOR
1566         bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1567         depends on EXPERIMENTAL
1568         help
1569           This option turns on the -fstack-protector GCC feature. This
1570           feature puts, at the beginning of functions, a canary value on
1571           the stack just before the return address, and validates
1572           the value just before actually returning.  Stack based buffer
1573           overflows (that need to overwrite this return address) now also
1574           overwrite the canary, which gets detected and the attack is then
1575           neutralized via a kernel panic.
1576           This feature requires gcc version 4.2 or above.
1577
1578 config DEPRECATED_PARAM_STRUCT
1579         bool "Provide old way to pass kernel parameters"
1580         help
1581           This was deprecated in 2001 and announced to live on for 5 years.
1582           Some old boot loaders still use this way.
1583
1584 endmenu
1585
1586 menu "Boot options"
1587
1588 # Compressed boot loader in ROM.  Yes, we really want to ask about
1589 # TEXT and BSS so we preserve their values in the config files.
1590 config ZBOOT_ROM_TEXT
1591         hex "Compressed ROM boot loader base address"
1592         default "0"
1593         help
1594           The physical address at which the ROM-able zImage is to be
1595           placed in the target.  Platforms which normally make use of
1596           ROM-able zImage formats normally set this to a suitable
1597           value in their defconfig file.
1598
1599           If ZBOOT_ROM is not enabled, this has no effect.
1600
1601 config ZBOOT_ROM_BSS
1602         hex "Compressed ROM boot loader BSS address"
1603         default "0"
1604         help
1605           The base address of an area of read/write memory in the target
1606           for the ROM-able zImage which must be available while the
1607           decompressor is running. It must be large enough to hold the
1608           entire decompressed kernel plus an additional 128 KiB.
1609           Platforms which normally make use of ROM-able zImage formats
1610           normally set this to a suitable value in their defconfig file.
1611
1612           If ZBOOT_ROM is not enabled, this has no effect.
1613
1614 config ZBOOT_ROM
1615         bool "Compressed boot loader in ROM/flash"
1616         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1617         help
1618           Say Y here if you intend to execute your compressed kernel image
1619           (zImage) directly from ROM or flash.  If unsure, say N.
1620
1621 config CMDLINE
1622         string "Default kernel command string"
1623         default ""
1624         help
1625           On some architectures (EBSA110 and CATS), there is currently no way
1626           for the boot loader to pass arguments to the kernel. For these
1627           architectures, you should supply some command-line options at build
1628           time by entering them here. As a minimum, you should specify the
1629           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1630
1631 config CMDLINE_FORCE
1632         bool "Always use the default kernel command string"
1633         depends on CMDLINE != ""
1634         help
1635           Always use the default kernel command string, even if the boot
1636           loader passes other arguments to the kernel.
1637           This is useful if you cannot or don't want to change the
1638           command-line options your boot loader passes to the kernel.
1639
1640           If unsure, say N.
1641
1642 config XIP_KERNEL
1643         bool "Kernel Execute-In-Place from ROM"
1644         depends on !ZBOOT_ROM
1645         help
1646           Execute-In-Place allows the kernel to run from non-volatile storage
1647           directly addressable by the CPU, such as NOR flash. This saves RAM
1648           space since the text section of the kernel is not loaded from flash
1649           to RAM.  Read-write sections, such as the data section and stack,
1650           are still copied to RAM.  The XIP kernel is not compressed since
1651           it has to run directly from flash, so it will take more space to
1652           store it.  The flash address used to link the kernel object files,
1653           and for storing it, is configuration dependent. Therefore, if you
1654           say Y here, you must know the proper physical address where to
1655           store the kernel image depending on your own flash memory usage.
1656
1657           Also note that the make target becomes "make xipImage" rather than
1658           "make zImage" or "make Image".  The final kernel binary to put in
1659           ROM memory will be arch/arm/boot/xipImage.
1660
1661           If unsure, say N.
1662
1663 config XIP_PHYS_ADDR
1664         hex "XIP Kernel Physical Location"
1665         depends on XIP_KERNEL
1666         default "0x00080000"
1667         help
1668           This is the physical address in your flash memory the kernel will
1669           be linked for and stored to.  This address is dependent on your
1670           own flash usage.
1671
1672 config KEXEC
1673         bool "Kexec system call (EXPERIMENTAL)"
1674         depends on EXPERIMENTAL
1675         help
1676           kexec is a system call that implements the ability to shutdown your
1677           current kernel, and to start another kernel.  It is like a reboot
1678           but it is independent of the system firmware.   And like a reboot
1679           you can start any kernel with it, not just Linux.
1680
1681           It is an ongoing process to be certain the hardware in a machine
1682           is properly shutdown, so do not be surprised if this code does not
1683           initially work for you.  It may help to enable device hotplugging
1684           support.
1685
1686 config ATAGS_PROC
1687         bool "Export atags in procfs"
1688         depends on KEXEC
1689         default y
1690         help
1691           Should the atags used to boot the kernel be exported in an "atags"
1692           file in procfs. Useful with kexec.
1693
1694 config CRASH_DUMP
1695         bool "Build kdump crash kernel (EXPERIMENTAL)"
1696         depends on EXPERIMENTAL
1697         help
1698           Generate crash dump after being started by kexec. This should
1699           be normally only set in special crash dump kernels which are
1700           loaded in the main kernel with kexec-tools into a specially
1701           reserved region and then later executed after a crash by
1702           kdump/kexec. The crash dump kernel must be compiled to a
1703           memory address not used by the main kernel
1704
1705           For more details see Documentation/kdump/kdump.txt
1706
1707 config AUTO_ZRELADDR
1708         bool "Auto calculation of the decompressed kernel image address"
1709         depends on !ZBOOT_ROM && !ARCH_U300
1710         help
1711           ZRELADDR is the physical address where the decompressed kernel
1712           image will be placed. If AUTO_ZRELADDR is selected, the address
1713           will be determined at run-time by masking the current IP with
1714           0xf8000000. This assumes the zImage being placed in the first 128MB
1715           from start of memory.
1716
1717 endmenu
1718
1719 menu "CPU Power Management"
1720
1721 if ARCH_HAS_CPUFREQ
1722
1723 source "drivers/cpufreq/Kconfig"
1724
1725 config CPU_FREQ_IMX
1726         tristate "CPUfreq driver for i.MX CPUs"
1727         depends on ARCH_MXC && CPU_FREQ
1728         help
1729           This enables the CPUfreq driver for i.MX CPUs.
1730
1731 config CPU_FREQ_SA1100
1732         bool
1733
1734 config CPU_FREQ_SA1110
1735         bool
1736
1737 config CPU_FREQ_INTEGRATOR
1738         tristate "CPUfreq driver for ARM Integrator CPUs"
1739         depends on ARCH_INTEGRATOR && CPU_FREQ
1740         default y
1741         help
1742           This enables the CPUfreq driver for ARM Integrator CPUs.
1743
1744           For details, take a look at <file:Documentation/cpu-freq>.
1745
1746           If in doubt, say Y.
1747
1748 config CPU_FREQ_PXA
1749         bool
1750         depends on CPU_FREQ && ARCH_PXA && PXA25x
1751         default y
1752         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1753
1754 config CPU_FREQ_S3C64XX
1755         bool "CPUfreq support for Samsung S3C64XX CPUs"
1756         depends on CPU_FREQ && CPU_S3C6410
1757
1758 config CPU_FREQ_S3C
1759         bool
1760         help
1761           Internal configuration node for common cpufreq on Samsung SoC
1762
1763 config CPU_FREQ_S3C24XX
1764         bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
1765         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1766         select CPU_FREQ_S3C
1767         help
1768           This enables the CPUfreq driver for the Samsung S3C24XX family
1769           of CPUs.
1770
1771           For details, take a look at <file:Documentation/cpu-freq>.
1772
1773           If in doubt, say N.
1774
1775 config CPU_FREQ_S3C24XX_PLL
1776         bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
1777         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1778         help
1779           Compile in support for changing the PLL frequency from the
1780           S3C24XX series CPUfreq driver. The PLL takes time to settle
1781           after a frequency change, so by default it is not enabled.
1782
1783           This also means that the PLL tables for the selected CPU(s) will
1784           be built which may increase the size of the kernel image.
1785
1786 config CPU_FREQ_S3C24XX_DEBUG
1787         bool "Debug CPUfreq Samsung driver core"
1788         depends on CPU_FREQ_S3C24XX
1789         help
1790           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1791
1792 config CPU_FREQ_S3C24XX_IODEBUG
1793         bool "Debug CPUfreq Samsung driver IO timing"
1794         depends on CPU_FREQ_S3C24XX
1795         help
1796           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1797
1798 config CPU_FREQ_S3C24XX_DEBUGFS
1799         bool "Export debugfs for CPUFreq"
1800         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1801         help
1802           Export status information via debugfs.
1803
1804 endif
1805
1806 source "drivers/cpuidle/Kconfig"
1807
1808 endmenu
1809
1810 menu "Floating point emulation"
1811
1812 comment "At least one emulation must be selected"
1813
1814 config FPE_NWFPE
1815         bool "NWFPE math emulation"
1816         depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
1817         ---help---
1818           Say Y to include the NWFPE floating point emulator in the kernel.
1819           This is necessary to run most binaries. Linux does not currently
1820           support floating point hardware so you need to say Y here even if
1821           your machine has an FPA or floating point co-processor podule.
1822
1823           You may say N here if you are going to load the Acorn FPEmulator
1824           early in the bootup.
1825
1826 config FPE_NWFPE_XP
1827         bool "Support extended precision"
1828         depends on FPE_NWFPE
1829         help
1830           Say Y to include 80-bit support in the kernel floating-point
1831           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1832           Note that gcc does not generate 80-bit operations by default,
1833           so in most cases this option only enlarges the size of the
1834           floating point emulator without any good reason.
1835
1836           You almost surely want to say N here.
1837
1838 config FPE_FASTFPE
1839         bool "FastFPE math emulation (EXPERIMENTAL)"
1840         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1841         ---help---
1842           Say Y here to include the FAST floating point emulator in the kernel.
1843           This is an experimental much faster emulator which now also has full
1844           precision for the mantissa.  It does not support any exceptions.
1845           It is very simple, and approximately 3-6 times faster than NWFPE.
1846
1847           It should be sufficient for most programs.  It may be not suitable
1848           for scientific calculations, but you have to check this for yourself.
1849           If you do not feel you need a faster FP emulation you should better
1850           choose NWFPE.
1851
1852 config VFP
1853         bool "VFP-format floating point maths"
1854         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1855         help
1856           Say Y to include VFP support code in the kernel. This is needed
1857           if your hardware includes a VFP unit.
1858
1859           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1860           release notes and additional status information.
1861
1862           Say N if your target does not have VFP hardware.
1863
1864 config VFPv3
1865         bool
1866         depends on VFP
1867         default y if CPU_V7
1868
1869 config NEON
1870         bool "Advanced SIMD (NEON) Extension support"
1871         depends on VFPv3 && CPU_V7
1872         help
1873           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1874           Extension.
1875
1876 endmenu
1877
1878 menu "Userspace binary formats"
1879
1880 source "fs/Kconfig.binfmt"
1881
1882 config ARTHUR
1883         tristate "RISC OS personality"
1884         depends on !AEABI
1885         help
1886           Say Y here to include the kernel code necessary if you want to run
1887           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1888           experimental; if this sounds frightening, say N and sleep in peace.
1889           You can also say M here to compile this support as a module (which
1890           will be called arthur).
1891
1892 endmenu
1893
1894 menu "Power management options"
1895
1896 source "kernel/power/Kconfig"
1897
1898 config ARCH_SUSPEND_POSSIBLE
1899         def_bool y
1900
1901 endmenu
1902
1903 source "net/Kconfig"
1904
1905 source "drivers/Kconfig"
1906
1907 source "fs/Kconfig"
1908
1909 source "arch/arm/Kconfig.debug"
1910
1911 source "security/Kconfig"
1912
1913 source "crypto/Kconfig"
1914
1915 source "lib/Kconfig"