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