arch/arm/Kconfig

   1 #
   2 # For a description of the syntax of this configuration file,
   3 # see Documentation/kbuild/kconfig-language.txt.
   4 #
   5
   6 mainmenu "Linux Kernel Configuration"
   7
   8 config ARM
   9         bool
  10         default y
  11         select HAVE_AOUT
  12         select HAVE_IDE
  13         select HAVE_MEMBLOCK
  14         select RTC_LIB
  15         select SYS_SUPPORTS_APM_EMULATION
  16         select GENERIC_ATOMIC64 if (!CPU_32v6K)
  17         select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  18         select HAVE_ARCH_KGDB
  19         select HAVE_KPROBES if (!XIP_KERNEL)
  20         select HAVE_KRETPROBES if (HAVE_KPROBES)
  21         select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  22         select HAVE_GENERIC_DMA_COHERENT
  23         select HAVE_KERNEL_GZIP
  24         select HAVE_KERNEL_LZO
  25         select HAVE_KERNEL_LZMA
  26         select HAVE_PERF_EVENTS
  27         select PERF_USE_VMALLOC
  28         select HAVE_REGS_AND_STACK_ACCESS_API
  29         help
  30           The ARM series is a line of low-power-consumption RISC chip designs
  31           licensed by ARM Ltd and targeted at embedded applications and
  32           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  33           manufactured, but legacy ARM-based PC hardware remains popular in
  34           Europe.  There is an ARM Linux project with a web page at
  35           <http://www.arm.linux.org.uk/>.
  36
  37 config HAVE_PWM
  38         bool
  39
  40 config SYS_SUPPORTS_APM_EMULATION
  41         bool
  42
  43 config GENERIC_GPIO
  44         bool
  45
  46 config ARCH_USES_GETTIMEOFFSET
  47         bool
  48         default n
  49
  50 config GENERIC_CLOCKEVENTS
  51         bool
  52
  53 config GENERIC_CLOCKEVENTS_BROADCAST
  54         bool
  55         depends on GENERIC_CLOCKEVENTS
  56         default y if SMP
  57
  58 config HAVE_TCM
  59         bool
  60         select GENERIC_ALLOCATOR
  61
  62 config HAVE_PROC_CPU
  63         bool
  64
  65 config NO_IOPORT
  66         bool
  67
  68 config EISA
  69         bool
  70         ---help---
  71           The Extended Industry Standard Architecture (EISA) bus was
  72           developed as an open alternative to the IBM MicroChannel bus.
  73
  74           The EISA bus provided some of the features of the IBM MicroChannel
  75           bus while maintaining backward compatibility with cards made for
  76           the older ISA bus.  The EISA bus saw limited use between 1988 and
  77           1995 when it was made obsolete by the PCI bus.
  78
  79           Say Y here if you are building a kernel for an EISA-based machine.
  80
  81           Otherwise, say N.
  82
  83 config SBUS
  84         bool
  85
  86 config MCA
  87         bool
  88         help
  89           MicroChannel Architecture is found in some IBM PS/2 machines and
  90           laptops.  It is a bus system similar to PCI or ISA. See
  91           <file:Documentation/mca.txt> (and especially the web page given
  92           there) before attempting to build an MCA bus kernel.
  93
  94 config GENERIC_HARDIRQS
  95         bool
  96         default y
  97
  98 config STACKTRACE_SUPPORT
  99         bool
 100         default y
 101
 102 config HAVE_LATENCYTOP_SUPPORT
 103         bool
 104         depends on !SMP
 105         default y
 106
 107 config LOCKDEP_SUPPORT
 108         bool
 109         default y
 110
 111 config TRACE_IRQFLAGS_SUPPORT
 112         bool
 113         default y
 114
 115 config HARDIRQS_SW_RESEND
 116         bool
 117         default y
 118
 119 config GENERIC_IRQ_PROBE
 120         bool
 121         default y
 122
 123 config GENERIC_LOCKBREAK
 124         bool
 125         default y
 126         depends on SMP && PREEMPT
 127
 128 config RWSEM_GENERIC_SPINLOCK
 129         bool
 130         default y
 131
 132 config RWSEM_XCHGADD_ALGORITHM
 133         bool
 134
 135 config ARCH_HAS_ILOG2_U32
 136         bool
 137
 138 config ARCH_HAS_ILOG2_U64
 139         bool
 140
 141 config ARCH_HAS_CPUFREQ
 142         bool
 143         help
 144           Internal node to signify that the ARCH has CPUFREQ support
 145           and that the relevant menu configurations are displayed for
 146           it.
 147
 148 config GENERIC_HWEIGHT
 149         bool
 150         default y
 151
 152 config GENERIC_CALIBRATE_DELAY
 153         bool
 154         default y
 155
 156 config ARCH_MAY_HAVE_PC_FDC
 157         bool
 158
 159 config ZONE_DMA
 160         bool
 161
 162 config NEED_DMA_MAP_STATE
 163        def_bool y
 164
 165 config GENERIC_ISA_DMA
 166         bool
 167
 168 config FIQ
 169         bool
 170
 171 config ARCH_MTD_XIP
 172         bool
 173
 174 config GENERIC_HARDIRQS_NO__DO_IRQ
 175         def_bool y
 176
 177 config ARM_L1_CACHE_SHIFT_6
 178         bool
 179         help
 180           Setting ARM L1 cache line size to 64 Bytes.
 181
 182 config VECTORS_BASE
 183         hex
 184         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 185         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 186         default 0x00000000
 187         help
 188           The base address of exception vectors.
 189
 190 source "init/Kconfig"
 191
 192 source "kernel/Kconfig.freezer"
 193
 194 menu "System Type"
 195
 196 config MMU
 197         bool "MMU-based Paged Memory Management Support"
 198         default y
 199         help
 200           Select if you want MMU-based virtualised addressing space
 201           support by paged memory management. If unsure, say 'Y'.
 202
 203 #
 204 # The "ARM system type" choice list is ordered alphabetically by option
 205 # text.  Please add new entries in the option alphabetic order.
 206 #
 207 choice
 208         prompt "ARM system type"
 209         default ARCH_VERSATILE
 210
 211 config ARCH_AAEC2000
 212         bool "Agilent AAEC-2000 based"
 213         select CPU_ARM920T
 214         select ARM_AMBA
 215         select HAVE_CLK
 216         select ARCH_USES_GETTIMEOFFSET
 217         help
 218           This enables support for systems based on the Agilent AAEC-2000
 219
 220 config ARCH_INTEGRATOR
 221         bool "ARM Ltd. Integrator family"
 222         select ARM_AMBA
 223         select ARCH_HAS_CPUFREQ
 224         select COMMON_CLKDEV
 225         select ICST
 226         select GENERIC_CLOCKEVENTS
 227         select PLAT_VERSATILE
 228         help
 229           Support for ARM's Integrator platform.
 230
 231 config ARCH_REALVIEW
 232         bool "ARM Ltd. RealView family"
 233         select ARM_AMBA
 234         select COMMON_CLKDEV
 235         select ICST
 236         select GENERIC_CLOCKEVENTS
 237         select ARCH_WANT_OPTIONAL_GPIOLIB
 238         select PLAT_VERSATILE
 239         select ARM_TIMER_SP804
 240         select GPIO_PL061 if GPIOLIB
 241         help
 242           This enables support for ARM Ltd RealView boards.
 243
 244 config ARCH_VERSATILE
 245         bool "ARM Ltd. Versatile family"
 246         select ARM_AMBA
 247         select ARM_VIC
 248         select COMMON_CLKDEV
 249         select ICST
 250         select GENERIC_CLOCKEVENTS
 251         select ARCH_WANT_OPTIONAL_GPIOLIB
 252         select PLAT_VERSATILE
 253         select ARM_TIMER_SP804
 254         help
 255           This enables support for ARM Ltd Versatile board.
 256
 257 config ARCH_VEXPRESS
 258         bool "ARM Ltd. Versatile Express family"
 259         select ARCH_WANT_OPTIONAL_GPIOLIB
 260         select ARM_AMBA
 261         select ARM_TIMER_SP804
 262         select COMMON_CLKDEV
 263         select GENERIC_CLOCKEVENTS
 264         select HAVE_CLK
 265         select ICST
 266         select PLAT_VERSATILE
 267         help
 268           This enables support for the ARM Ltd Versatile Express boards.
 269
 270 config ARCH_AT91
 271         bool "Atmel AT91"
 272         select ARCH_REQUIRE_GPIOLIB
 273         select HAVE_CLK
 274         help
 275           This enables support for systems based on the Atmel AT91RM9200,
 276           AT91SAM9 and AT91CAP9 processors.
 277
 278 config ARCH_BCMRING
 279         bool "Broadcom BCMRING"
 280         depends on MMU
 281         select CPU_V6
 282         select ARM_AMBA
 283         select COMMON_CLKDEV
 284         select GENERIC_CLOCKEVENTS
 285         select ARCH_WANT_OPTIONAL_GPIOLIB
 286         help
 287           Support for Broadcom's BCMRing platform.
 288
 289 config ARCH_CLPS711X
 290         bool "Cirrus Logic CLPS711x/EP721x-based"
 291         select CPU_ARM720T
 292         select ARCH_USES_GETTIMEOFFSET
 293         help
 294           Support for Cirrus Logic 711x/721x based boards.
 295
 296 config ARCH_CNS3XXX
 297         bool "Cavium Networks CNS3XXX family"
 298         select CPU_V6
 299         select GENERIC_CLOCKEVENTS
 300         select ARM_GIC
 301         select PCI_DOMAINS if PCI
 302         help
 303           Support for Cavium Networks CNS3XXX platform.
 304
 305 config ARCH_GEMINI
 306         bool "Cortina Systems Gemini"
 307         select CPU_FA526
 308         select ARCH_REQUIRE_GPIOLIB
 309         select ARCH_USES_GETTIMEOFFSET
 310         help
 311           Support for the Cortina Systems Gemini family SoCs
 312
 313 config ARCH_EBSA110
 314         bool "EBSA-110"
 315         select CPU_SA110
 316         select ISA
 317         select NO_IOPORT
 318         select ARCH_USES_GETTIMEOFFSET
 319         help
 320           This is an evaluation board for the StrongARM processor available
 321           from Digital. It has limited hardware on-board, including an
 322           Ethernet interface, two PCMCIA sockets, two serial ports and a
 323           parallel port.
 324
 325 config ARCH_EP93XX
 326         bool "EP93xx-based"
 327         select CPU_ARM920T
 328         select ARM_AMBA
 329         select ARM_VIC
 330         select COMMON_CLKDEV
 331         select ARCH_REQUIRE_GPIOLIB
 332         select ARCH_HAS_HOLES_MEMORYMODEL
 333         select ARCH_USES_GETTIMEOFFSET
 334         help
 335           This enables support for the Cirrus EP93xx series of CPUs.
 336
 337 config ARCH_FOOTBRIDGE
 338         bool "FootBridge"
 339         select CPU_SA110
 340         select FOOTBRIDGE
 341         select ARCH_USES_GETTIMEOFFSET
 342         help
 343           Support for systems based on the DC21285 companion chip
 344           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 345
 346 config ARCH_MXC
 347         bool "Freescale MXC/iMX-based"
 348         select GENERIC_CLOCKEVENTS
 349         select ARCH_REQUIRE_GPIOLIB
 350         select COMMON_CLKDEV
 351         help
 352           Support for Freescale MXC/iMX-based family of processors
 353
 354 config ARCH_STMP3XXX
 355         bool "Freescale STMP3xxx"
 356         select CPU_ARM926T
 357         select COMMON_CLKDEV
 358         select ARCH_REQUIRE_GPIOLIB
 359         select GENERIC_CLOCKEVENTS
 360         select USB_ARCH_HAS_EHCI
 361         help
 362           Support for systems based on the Freescale 3xxx CPUs.
 363
 364 config ARCH_NETX
 365         bool "Hilscher NetX based"
 366         select CPU_ARM926T
 367         select ARM_VIC
 368         select GENERIC_CLOCKEVENTS
 369         help
 370           This enables support for systems based on the Hilscher NetX Soc
 371
 372 config ARCH_H720X
 373         bool "Hynix HMS720x-based"
 374         select CPU_ARM720T
 375         select ISA_DMA_API
 376         select ARCH_USES_GETTIMEOFFSET
 377         help
 378           This enables support for systems based on the Hynix HMS720x
 379
 380 config ARCH_IOP13XX
 381         bool "IOP13xx-based"
 382         depends on MMU
 383         select CPU_XSC3
 384         select PLAT_IOP
 385         select PCI
 386         select ARCH_SUPPORTS_MSI
 387         select VMSPLIT_1G
 388         help
 389           Support for Intel's IOP13XX (XScale) family of processors.
 390
 391 config ARCH_IOP32X
 392         bool "IOP32x-based"
 393         depends on MMU
 394         select CPU_XSCALE
 395         select PLAT_IOP
 396         select PCI
 397         select ARCH_REQUIRE_GPIOLIB
 398         help
 399           Support for Intel's 80219 and IOP32X (XScale) family of
 400           processors.
 401
 402 config ARCH_IOP33X
 403         bool "IOP33x-based"
 404         depends on MMU
 405         select CPU_XSCALE
 406         select PLAT_IOP
 407         select PCI
 408         select ARCH_REQUIRE_GPIOLIB
 409         help
 410           Support for Intel's IOP33X (XScale) family of processors.
 411
 412 config ARCH_IXP23XX
 413         bool "IXP23XX-based"
 414         depends on MMU
 415         select CPU_XSC3
 416         select PCI
 417         select ARCH_USES_GETTIMEOFFSET
 418         help
 419           Support for Intel's IXP23xx (XScale) family of processors.
 420
 421 config ARCH_IXP2000
 422         bool "IXP2400/2800-based"
 423         depends on MMU
 424         select CPU_XSCALE
 425         select PCI
 426         select ARCH_USES_GETTIMEOFFSET
 427         help
 428           Support for Intel's IXP2400/2800 (XScale) family of processors.
 429
 430 config ARCH_IXP4XX
 431         bool "IXP4xx-based"
 432         depends on MMU
 433         select CPU_XSCALE
 434         select GENERIC_GPIO
 435         select GENERIC_CLOCKEVENTS
 436         select DMABOUNCE if PCI
 437         help
 438           Support for Intel's IXP4XX (XScale) family of processors.
 439
 440 config ARCH_DOVE
 441         bool "Marvell Dove"
 442         select PCI
 443         select ARCH_REQUIRE_GPIOLIB
 444         select GENERIC_CLOCKEVENTS
 445         select PLAT_ORION
 446         help
 447           Support for the Marvell Dove SoC 88AP510
 448
 449 config ARCH_KIRKWOOD
 450         bool "Marvell Kirkwood"
 451         select CPU_FEROCEON
 452         select PCI
 453         select ARCH_REQUIRE_GPIOLIB
 454         select GENERIC_CLOCKEVENTS
 455         select PLAT_ORION
 456         help
 457           Support for the following Marvell Kirkwood series SoCs:
 458           88F6180, 88F6192 and 88F6281.
 459
 460 config ARCH_LOKI
 461         bool "Marvell Loki (88RC8480)"
 462         select CPU_FEROCEON
 463         select GENERIC_CLOCKEVENTS
 464         select PLAT_ORION
 465         help
 466           Support for the Marvell Loki (88RC8480) SoC.
 467
 468 config ARCH_LPC32XX
 469         bool "NXP LPC32XX"
 470         select CPU_ARM926T
 471         select ARCH_REQUIRE_GPIOLIB
 472         select HAVE_IDE
 473         select ARM_AMBA
 474         select USB_ARCH_HAS_OHCI
 475         select COMMON_CLKDEV
 476         select GENERIC_TIME
 477         select GENERIC_CLOCKEVENTS
 478         help
 479           Support for the NXP LPC32XX family of processors
 480
 481 config ARCH_MV78XX0
 482         bool "Marvell MV78xx0"
 483         select CPU_FEROCEON
 484         select PCI
 485         select ARCH_REQUIRE_GPIOLIB
 486         select GENERIC_CLOCKEVENTS
 487         select PLAT_ORION
 488         help
 489           Support for the following Marvell MV78xx0 series SoCs:
 490           MV781x0, MV782x0.
 491
 492 config ARCH_ORION5X
 493         bool "Marvell Orion"
 494         depends on MMU
 495         select CPU_FEROCEON
 496         select PCI
 497         select ARCH_REQUIRE_GPIOLIB
 498         select GENERIC_CLOCKEVENTS
 499         select PLAT_ORION
 500         help
 501           Support for the following Marvell Orion 5x series SoCs:
 502           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 503           Orion-2 (5281), Orion-1-90 (6183).
 504
 505 config ARCH_MMP
 506         bool "Marvell PXA168/910/MMP2"
 507         depends on MMU
 508         select ARCH_REQUIRE_GPIOLIB
 509         select COMMON_CLKDEV
 510         select GENERIC_CLOCKEVENTS
 511         select TICK_ONESHOT
 512         select PLAT_PXA
 513         help
 514           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 515
 516 config ARCH_KS8695
 517         bool "Micrel/Kendin KS8695"
 518         select CPU_ARM922T
 519         select ARCH_REQUIRE_GPIOLIB
 520         select ARCH_USES_GETTIMEOFFSET
 521         help
 522           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 523           System-on-Chip devices.
 524
 525 config ARCH_NS9XXX
 526         bool "NetSilicon NS9xxx"
 527         select CPU_ARM926T
 528         select GENERIC_GPIO
 529         select GENERIC_CLOCKEVENTS
 530         select HAVE_CLK
 531         help
 532           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 533           System.
 534
 535           <http://www.digi.com/products/microprocessors/index.jsp>
 536
 537 config ARCH_W90X900
 538         bool "Nuvoton W90X900 CPU"
 539         select CPU_ARM926T
 540         select ARCH_REQUIRE_GPIOLIB
 541         select COMMON_CLKDEV
 542         select GENERIC_CLOCKEVENTS
 543         help
 544           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 545           At present, the w90x900 has been renamed nuc900, regarding
 546           the ARM series product line, you can login the following
 547           link address to know more.
 548
 549           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 550                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 551
 552 config ARCH_NUC93X
 553         bool "Nuvoton NUC93X CPU"
 554         select CPU_ARM926T
 555         select COMMON_CLKDEV
 556         help
 557           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 558           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 559
 560 config ARCH_TEGRA
 561         bool "NVIDIA Tegra"
 562         select GENERIC_TIME
 563         select GENERIC_CLOCKEVENTS
 564         select GENERIC_GPIO
 565         select HAVE_CLK
 566         select COMMON_CLKDEV
 567         select ARCH_HAS_BARRIERS if CACHE_L2X0
 568         help
 569           This enables support for NVIDIA Tegra based systems (Tegra APX,
 570           Tegra 6xx and Tegra 2 series).
 571
 572 config ARCH_PNX4008
 573         bool "Philips Nexperia PNX4008 Mobile"
 574         select CPU_ARM926T
 575         select COMMON_CLKDEV
 576         select ARCH_USES_GETTIMEOFFSET
 577         help
 578           This enables support for Philips PNX4008 mobile platform.
 579
 580 config ARCH_PXA
 581         bool "PXA2xx/PXA3xx-based"
 582         depends on MMU
 583         select ARCH_MTD_XIP
 584         select ARCH_HAS_CPUFREQ
 585         select COMMON_CLKDEV
 586         select ARCH_REQUIRE_GPIOLIB
 587         select GENERIC_CLOCKEVENTS
 588         select TICK_ONESHOT
 589         select PLAT_PXA
 590         help
 591           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 592
 593 config ARCH_MSM
 594         bool "Qualcomm MSM"
 595         select HAVE_CLK
 596         select GENERIC_CLOCKEVENTS
 597         select ARCH_REQUIRE_GPIOLIB
 598         help
 599           Support for Qualcomm MSM/QSD based systems.  This runs on the
 600           apps processor of the MSM/QSD and depends on a shared memory
 601           interface to the modem processor which runs the baseband
 602           stack and controls some vital subsystems
 603           (clock and power control, etc).
 604
 605 config ARCH_SHMOBILE
 606         bool "Renesas SH-Mobile"
 607         help
 608           Support for Renesas's SH-Mobile ARM platforms
 609
 610 config ARCH_RPC
 611         bool "RiscPC"
 612         select ARCH_ACORN
 613         select FIQ
 614         select TIMER_ACORN
 615         select ARCH_MAY_HAVE_PC_FDC
 616         select HAVE_PATA_PLATFORM
 617         select ISA_DMA_API
 618         select NO_IOPORT
 619         select ARCH_SPARSEMEM_ENABLE
 620         select ARCH_USES_GETTIMEOFFSET
 621         help
 622           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 623           CD-ROM interface, serial and parallel port, and the floppy drive.
 624
 625 config ARCH_SA1100
 626         bool "SA1100-based"
 627         select CPU_SA1100
 628         select ISA
 629         select ARCH_SPARSEMEM_ENABLE
 630         select ARCH_MTD_XIP
 631         select ARCH_HAS_CPUFREQ
 632         select CPU_FREQ
 633         select GENERIC_CLOCKEVENTS
 634         select HAVE_CLK
 635         select TICK_ONESHOT
 636         select ARCH_REQUIRE_GPIOLIB
 637         help
 638           Support for StrongARM 11x0 based boards.
 639
 640 config ARCH_S3C2410
 641         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
 642         select GENERIC_GPIO
 643         select ARCH_HAS_CPUFREQ
 644         select HAVE_CLK
 645         select ARCH_USES_GETTIMEOFFSET
 646         select HAVE_S3C2410_I2C
 647         help
 648           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 649           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 650           the Samsung SMDK2410 development board (and derivatives).
 651
 652           Note, the S3C2416 and the S3C2450 are so close that they even share
 653           the same SoC ID code. This means that there is no seperate machine
 654           directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
 655
 656 config ARCH_S3C64XX
 657         bool "Samsung S3C64XX"
 658         select PLAT_SAMSUNG
 659         select CPU_V6
 660         select ARM_VIC
 661         select HAVE_CLK
 662         select NO_IOPORT
 663         select ARCH_USES_GETTIMEOFFSET
 664         select ARCH_HAS_CPUFREQ
 665         select ARCH_REQUIRE_GPIOLIB
 666         select SAMSUNG_CLKSRC
 667         select SAMSUNG_IRQ_VIC_TIMER
 668         select SAMSUNG_IRQ_UART
 669         select S3C_GPIO_TRACK
 670         select S3C_GPIO_PULL_UPDOWN
 671         select S3C_GPIO_CFG_S3C24XX
 672         select S3C_GPIO_CFG_S3C64XX
 673         select S3C_DEV_NAND
 674         select USB_ARCH_HAS_OHCI
 675         select SAMSUNG_GPIOLIB_4BIT
 676         select HAVE_S3C2410_I2C
 677         select HAVE_S3C2410_WATCHDOG
 678         help
 679           Samsung S3C64XX series based systems
 680
 681 config ARCH_S5P6440
 682         bool "Samsung S5P6440"
 683         select CPU_V6
 684         select GENERIC_GPIO
 685         select HAVE_CLK
 686         select HAVE_S3C2410_WATCHDOG
 687         select ARCH_USES_GETTIMEOFFSET
 688         select HAVE_S3C2410_I2C
 689         select HAVE_S3C_RTC
 690         help
 691           Samsung S5P6440 CPU based systems
 692
 693 config ARCH_S5P6442
 694         bool "Samsung S5P6442"
 695         select CPU_V6
 696         select GENERIC_GPIO
 697         select HAVE_CLK
 698         select ARCH_USES_GETTIMEOFFSET
 699         select HAVE_S3C2410_WATCHDOG
 700         help
 701           Samsung S5P6442 CPU based systems
 702
 703 config ARCH_S5PC100
 704         bool "Samsung S5PC100"
 705         select GENERIC_GPIO
 706         select HAVE_CLK
 707         select CPU_V7
 708         select ARM_L1_CACHE_SHIFT_6
 709         select ARCH_USES_GETTIMEOFFSET
 710         select HAVE_S3C2410_I2C
 711         select HAVE_S3C_RTC
 712         select HAVE_S3C2410_WATCHDOG
 713         help
 714           Samsung S5PC100 series based systems
 715
 716 config ARCH_S5PV210
 717         bool "Samsung S5PV210/S5PC110"
 718         select CPU_V7
 719         select GENERIC_GPIO
 720         select HAVE_CLK
 721         select ARM_L1_CACHE_SHIFT_6
 722         select ARCH_USES_GETTIMEOFFSET
 723         select HAVE_S3C2410_I2C
 724         select HAVE_S3C_RTC
 725         select HAVE_S3C2410_WATCHDOG
 726         help
 727           Samsung S5PV210/S5PC110 series based systems
 728
 729 config ARCH_S5PV310
 730         bool "Samsung S5PV310/S5PC210"
 731         select CPU_V7
 732         select GENERIC_GPIO
 733         select HAVE_CLK
 734         select GENERIC_CLOCKEVENTS
 735         help
 736           Samsung S5PV310 series based systems
 737
 738 config ARCH_SHARK
 739         bool "Shark"
 740         select CPU_SA110
 741         select ISA
 742         select ISA_DMA
 743         select ZONE_DMA
 744         select PCI
 745         select ARCH_USES_GETTIMEOFFSET
 746         help
 747           Support for the StrongARM based Digital DNARD machine, also known
 748           as "Shark" (<http://www.shark-linux.de/shark.html>).
 749
 750 config ARCH_LH7A40X
 751         bool "Sharp LH7A40X"
 752         select CPU_ARM922T
 753         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 754         select ARCH_USES_GETTIMEOFFSET
 755         help
 756           Say Y here for systems based on one of the Sharp LH7A40X
 757           System on a Chip processors.  These CPUs include an ARM922T
 758           core with a wide array of integrated devices for
 759           hand-held and low-power applications.
 760
 761 config ARCH_U300
 762         bool "ST-Ericsson U300 Series"
 763         depends on MMU
 764         select CPU_ARM926T
 765         select HAVE_TCM
 766         select ARM_AMBA
 767         select ARM_VIC
 768         select GENERIC_CLOCKEVENTS
 769         select COMMON_CLKDEV
 770         select GENERIC_GPIO
 771         help
 772           Support for ST-Ericsson U300 series mobile platforms.
 773
 774 config ARCH_U8500
 775         bool "ST-Ericsson U8500 Series"
 776         select CPU_V7
 777         select ARM_AMBA
 778         select GENERIC_CLOCKEVENTS
 779         select COMMON_CLKDEV
 780         select ARCH_REQUIRE_GPIOLIB
 781         help
 782           Support for ST-Ericsson's Ux500 architecture
 783
 784 config ARCH_NOMADIK
 785         bool "STMicroelectronics Nomadik"
 786         select ARM_AMBA
 787         select ARM_VIC
 788         select CPU_ARM926T
 789         select COMMON_CLKDEV
 790         select GENERIC_CLOCKEVENTS
 791         select ARCH_REQUIRE_GPIOLIB
 792         help
 793           Support for the Nomadik platform by ST-Ericsson
 794
 795 config ARCH_DAVINCI
 796         bool "TI DaVinci"
 797         select GENERIC_CLOCKEVENTS
 798         select ARCH_REQUIRE_GPIOLIB
 799         select ZONE_DMA
 800         select HAVE_IDE
 801         select COMMON_CLKDEV
 802         select GENERIC_ALLOCATOR
 803         select ARCH_HAS_HOLES_MEMORYMODEL
 804         help
 805           Support for TI's DaVinci platform.
 806
 807 config ARCH_OMAP
 808         bool "TI OMAP"
 809         select HAVE_CLK
 810         select ARCH_REQUIRE_GPIOLIB
 811         select ARCH_HAS_CPUFREQ
 812         select GENERIC_CLOCKEVENTS
 813         select ARCH_HAS_HOLES_MEMORYMODEL
 814         help
 815           Support for TI's OMAP platform (OMAP1 and OMAP2).
 816
 817 config PLAT_SPEAR
 818         bool "ST SPEAr"
 819         select ARM_AMBA
 820         select ARCH_REQUIRE_GPIOLIB
 821         select COMMON_CLKDEV
 822         select GENERIC_CLOCKEVENTS
 823         select HAVE_CLK
 824         help
 825           Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
 826
 827 endchoice
 828
 829 #
 830 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 831 # Kconfigs may be included either alphabetically (according to the
 832 # plat- suffix) or along side the corresponding mach-* source.
 833 #
 834 source "arch/arm/mach-aaec2000/Kconfig"
 835
 836 source "arch/arm/mach-at91/Kconfig"
 837
 838 source "arch/arm/mach-bcmring/Kconfig"
 839
 840 source "arch/arm/mach-clps711x/Kconfig"
 841
 842 source "arch/arm/mach-cns3xxx/Kconfig"
 843
 844 source "arch/arm/mach-davinci/Kconfig"
 845
 846 source "arch/arm/mach-dove/Kconfig"
 847
 848 source "arch/arm/mach-ep93xx/Kconfig"
 849
 850 source "arch/arm/mach-footbridge/Kconfig"
 851
 852 source "arch/arm/mach-gemini/Kconfig"
 853
 854 source "arch/arm/mach-h720x/Kconfig"
 855
 856 source "arch/arm/mach-integrator/Kconfig"
 857
 858 source "arch/arm/mach-iop32x/Kconfig"
 859
 860 source "arch/arm/mach-iop33x/Kconfig"
 861
 862 source "arch/arm/mach-iop13xx/Kconfig"
 863
 864 source "arch/arm/mach-ixp4xx/Kconfig"
 865
 866 source "arch/arm/mach-ixp2000/Kconfig"
 867
 868 source "arch/arm/mach-ixp23xx/Kconfig"
 869
 870 source "arch/arm/mach-kirkwood/Kconfig"
 871
 872 source "arch/arm/mach-ks8695/Kconfig"
 873
 874 source "arch/arm/mach-lh7a40x/Kconfig"
 875
 876 source "arch/arm/mach-loki/Kconfig"
 877
 878 source "arch/arm/mach-lpc32xx/Kconfig"
 879
 880 source "arch/arm/mach-msm/Kconfig"
 881
 882 source "arch/arm/mach-mv78xx0/Kconfig"
 883
 884 source "arch/arm/plat-mxc/Kconfig"
 885
 886 source "arch/arm/mach-netx/Kconfig"
 887
 888 source "arch/arm/mach-nomadik/Kconfig"
 889 source "arch/arm/plat-nomadik/Kconfig"
 890
 891 source "arch/arm/mach-ns9xxx/Kconfig"
 892
 893 source "arch/arm/mach-nuc93x/Kconfig"
 894
 895 source "arch/arm/plat-omap/Kconfig"
 896
 897 source "arch/arm/mach-omap1/Kconfig"
 898
 899 source "arch/arm/mach-omap2/Kconfig"
 900
 901 source "arch/arm/mach-orion5x/Kconfig"
 902
 903 source "arch/arm/mach-pxa/Kconfig"
 904 source "arch/arm/plat-pxa/Kconfig"
 905
 906 source "arch/arm/mach-mmp/Kconfig"
 907
 908 source "arch/arm/mach-realview/Kconfig"
 909
 910 source "arch/arm/mach-sa1100/Kconfig"
 911
 912 source "arch/arm/plat-samsung/Kconfig"
 913 source "arch/arm/plat-s3c24xx/Kconfig"
 914 source "arch/arm/plat-s5p/Kconfig"
 915
 916 source "arch/arm/plat-spear/Kconfig"
 917
 918 if ARCH_S3C2410
 919 source "arch/arm/mach-s3c2400/Kconfig"
 920 source "arch/arm/mach-s3c2410/Kconfig"
 921 source "arch/arm/mach-s3c2412/Kconfig"
 922 source "arch/arm/mach-s3c2416/Kconfig"
 923 source "arch/arm/mach-s3c2440/Kconfig"
 924 source "arch/arm/mach-s3c2443/Kconfig"
 925 endif
 926
 927 if ARCH_S3C64XX
 928 source "arch/arm/mach-s3c64xx/Kconfig"
 929 endif
 930
 931 source "arch/arm/mach-s5p6440/Kconfig"
 932
 933 source "arch/arm/mach-s5p6442/Kconfig"
 934
 935 source "arch/arm/mach-s5pc100/Kconfig"
 936
 937 source "arch/arm/mach-s5pv210/Kconfig"
 938
 939 source "arch/arm/mach-s5pv310/Kconfig"
 940
 941 source "arch/arm/mach-shmobile/Kconfig"
 942
 943 source "arch/arm/plat-stmp3xxx/Kconfig"
 944
 945 source "arch/arm/mach-tegra/Kconfig"
 946
 947 source "arch/arm/mach-u300/Kconfig"
 948
 949 source "arch/arm/mach-ux500/Kconfig"
 950
 951 source "arch/arm/mach-versatile/Kconfig"
 952
 953 source "arch/arm/mach-vexpress/Kconfig"
 954
 955 source "arch/arm/mach-w90x900/Kconfig"
 956
 957 # Definitions to make life easier
 958 config ARCH_ACORN
 959         bool
 960
 961 config PLAT_IOP
 962         bool
 963         select GENERIC_CLOCKEVENTS
 964
 965 config PLAT_ORION
 966         bool
 967
 968 config PLAT_PXA
 969         bool
 970
 971 config PLAT_VERSATILE
 972         bool
 973
 974 config ARM_TIMER_SP804
 975         bool
 976
 977 source arch/arm/mm/Kconfig
 978
 979 config IWMMXT
 980         bool "Enable iWMMXt support"
 981         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 982         default y if PXA27x || PXA3xx || ARCH_MMP
 983         help
 984           Enable support for iWMMXt context switching at run time if
 985           running on a CPU that supports it.
 986
 987 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 988 config XSCALE_PMU
 989         bool
 990         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 991         default y
 992
 993 config CPU_HAS_PMU
 994         depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
 995                    (!ARCH_OMAP3 || OMAP3_EMU)
 996         default y
 997         bool
 998
 999 if !MMU
1000 source "arch/arm/Kconfig-nommu"
1001 endif
1002
1003 config ARM_ERRATA_411920
1004         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1005         depends on CPU_V6 && !SMP
1006         help
1007           Invalidation of the Instruction Cache operation can
1008           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1009           It does not affect the MPCore. This option enables the ARM Ltd.
1010           recommended workaround.
1011
1012 config ARM_ERRATA_430973
1013         bool "ARM errata: Stale prediction on replaced interworking branch"
1014         depends on CPU_V7
1015         help
1016           This option enables the workaround for the 430973 Cortex-A8
1017           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1018           interworking branch is replaced with another code sequence at the
1019           same virtual address, whether due to self-modifying code or virtual
1020           to physical address re-mapping, Cortex-A8 does not recover from the
1021           stale interworking branch prediction. This results in Cortex-A8
1022           executing the new code sequence in the incorrect ARM or Thumb state.
1023           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1024           and also flushes the branch target cache at every context switch.
1025           Note that setting specific bits in the ACTLR register may not be
1026           available in non-secure mode.
1027
1028 config ARM_ERRATA_458693
1029         bool "ARM errata: Processor deadlock when a false hazard is created"
1030         depends on CPU_V7
1031         help
1032           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1033           erratum. For very specific sequences of memory operations, it is
1034           possible for a hazard condition intended for a cache line to instead
1035           be incorrectly associated with a different cache line. This false
1036           hazard might then cause a processor deadlock. The workaround enables
1037           the L1 caching of the NEON accesses and disables the PLD instruction
1038           in the ACTLR register. Note that setting specific bits in the ACTLR
1039           register may not be available in non-secure mode.
1040
1041 config ARM_ERRATA_460075
1042         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1043         depends on CPU_V7
1044         help
1045           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1046           erratum. Any asynchronous access to the L2 cache may encounter a
1047           situation in which recent store transactions to the L2 cache are lost
1048           and overwritten with stale memory contents from external memory. The
1049           workaround disables the write-allocate mode for the L2 cache via the
1050           ACTLR register. Note that setting specific bits in the ACTLR register
1051           may not be available in non-secure mode.
1052
1053 config ARM_ERRATA_742230
1054         bool "ARM errata: DMB operation may be faulty"
1055         depends on CPU_V7 && SMP
1056         help
1057           This option enables the workaround for the 742230 Cortex-A9
1058           (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1059           between two write operations may not ensure the correct visibility
1060           ordering of the two writes. This workaround sets a specific bit in
1061           the diagnostic register of the Cortex-A9 which causes the DMB
1062           instruction to behave as a DSB, ensuring the correct behaviour of
1063           the two writes.
1064
1065 config ARM_ERRATA_742231
1066         bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1067         depends on CPU_V7 && SMP
1068         help
1069           This option enables the workaround for the 742231 Cortex-A9
1070           (r2p0..r2p2) erratum. Under certain conditions, specific to the
1071           Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1072           accessing some data located in the same cache line, may get corrupted
1073           data due to bad handling of the address hazard when the line gets
1074           replaced from one of the CPUs at the same time as another CPU is
1075           accessing it. This workaround sets specific bits in the diagnostic
1076           register of the Cortex-A9 which reduces the linefill issuing
1077           capabilities of the processor.
1078
1079 config PL310_ERRATA_588369
1080         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1081         depends on CACHE_L2X0 && ARCH_OMAP4
1082         help
1083            The PL310 L2 cache controller implements three types of Clean &
1084            Invalidate maintenance operations: by Physical Address
1085            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1086            They are architecturally defined to behave as the execution of a
1087            clean operation followed immediately by an invalidate operation,
1088            both performing to the same memory location. This functionality
1089            is not correctly implemented in PL310 as clean lines are not
1090            invalidated as a result of these operations. Note that this errata
1091            uses Texas Instrument's secure monitor api.
1092
1093 config ARM_ERRATA_720789
1094         bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1095         depends on CPU_V7 && SMP
1096         help
1097           This option enables the workaround for the 720789 Cortex-A9 (prior to
1098           r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1099           broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1100           As a consequence of this erratum, some TLB entries which should be
1101           invalidated are not, resulting in an incoherency in the system page
1102           tables. The workaround changes the TLB flushing routines to invalidate
1103           entries regardless of the ASID.
1104 endmenu
1105
1106 source "arch/arm/common/Kconfig"
1107
1108 menu "Bus support"
1109
1110 config ARM_AMBA
1111         bool
1112
1113 config ISA
1114         bool
1115         help
1116           Find out whether you have ISA slots on your motherboard.  ISA is the
1117           name of a bus system, i.e. the way the CPU talks to the other stuff
1118           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1119           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1120           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1121
1122 # Select ISA DMA controller support
1123 config ISA_DMA
1124         bool
1125         select ISA_DMA_API
1126
1127 # Select ISA DMA interface
1128 config ISA_DMA_API
1129         bool
1130
1131 config PCI
1132         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE || ARCH_CNS3XXX
1133         help
1134           Find out whether you have a PCI motherboard. PCI is the name of a
1135           bus system, i.e. the way the CPU talks to the other stuff inside
1136           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1137           VESA. If you have PCI, say Y, otherwise N.
1138
1139 config PCI_DOMAINS
1140         bool
1141         depends on PCI
1142
1143 config PCI_SYSCALL
1144         def_bool PCI
1145
1146 # Select the host bridge type
1147 config PCI_HOST_VIA82C505
1148         bool
1149         depends on PCI && ARCH_SHARK
1150         default y
1151
1152 config PCI_HOST_ITE8152
1153         bool
1154         depends on PCI && MACH_ARMCORE
1155         default y
1156         select DMABOUNCE
1157
1158 source "drivers/pci/Kconfig"
1159
1160 source "drivers/pcmcia/Kconfig"
1161
1162 endmenu
1163
1164 menu "Kernel Features"
1165
1166 source "kernel/time/Kconfig"
1167
1168 config SMP
1169         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1170         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1171                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
1172                  ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1173         depends on GENERIC_CLOCKEVENTS
1174         select USE_GENERIC_SMP_HELPERS
1175         select HAVE_ARM_SCU if ARCH_REALVIEW || ARCH_OMAP4 || ARCH_S5PV310 ||\
1176                  ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4
1177         help
1178           This enables support for systems with more than one CPU. If you have
1179           a system with only one CPU, like most personal computers, say N. If
1180           you have a system with more than one CPU, say Y.
1181
1182           If you say N here, the kernel will run on single and multiprocessor
1183           machines, but will use only one CPU of a multiprocessor machine. If
1184           you say Y here, the kernel will run on many, but not all, single
1185           processor machines. On a single processor machine, the kernel will
1186           run faster if you say N here.
1187
1188           See also <file:Documentation/i386/IO-APIC.txt>,
1189           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1190           <http://www.linuxdoc.org/docs.html#howto>.
1191
1192           If you don't know what to do here, say N.
1193
1194 config HAVE_ARM_SCU
1195         bool
1196         depends on SMP
1197         help
1198           This option enables support for the ARM system coherency unit
1199
1200 config HAVE_ARM_TWD
1201         bool
1202         depends on SMP
1203         help
1204           This options enables support for the ARM timer and watchdog unit
1205
1206 choice
1207         prompt "Memory split"
1208         default VMSPLIT_3G
1209         help
1210           Select the desired split between kernel and user memory.
1211
1212           If you are not absolutely sure what you are doing, leave this
1213           option alone!
1214
1215         config VMSPLIT_3G
1216                 bool "3G/1G user/kernel split"
1217         config VMSPLIT_2G
1218                 bool "2G/2G user/kernel split"
1219         config VMSPLIT_1G
1220                 bool "1G/3G user/kernel split"
1221 endchoice
1222
1223 config PAGE_OFFSET
1224         hex
1225         default 0x40000000 if VMSPLIT_1G
1226         default 0x80000000 if VMSPLIT_2G
1227         default 0xC0000000
1228
1229 config NR_CPUS
1230         int "Maximum number of CPUs (2-32)"
1231         range 2 32
1232         depends on SMP
1233         default "4"
1234
1235 config HOTPLUG_CPU
1236         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1237         depends on SMP && HOTPLUG && EXPERIMENTAL
1238         help
1239           Say Y here to experiment with turning CPUs off and on.  CPUs
1240           can be controlled through /sys/devices/system/cpu.
1241
1242 config LOCAL_TIMERS
1243         bool "Use local timer interrupts"
1244         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1245                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
1246                 ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1247         default y
1248         select HAVE_ARM_TWD if ARCH_REALVIEW || ARCH_OMAP4 || ARCH_S5PV310 || \
1249                 ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS
1250         help
1251           Enable support for local timers on SMP platforms, rather then the
1252           legacy IPI broadcast method.  Local timers allows the system
1253           accounting to be spread across the timer interval, preventing a
1254           "thundering herd" at every timer tick.
1255
1256 source kernel/Kconfig.preempt
1257
1258 config HZ
1259         int
1260         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || \
1261                 ARCH_S5P6442 || ARCH_S5PV210 || ARCH_S5PV310
1262         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1263         default AT91_TIMER_HZ if ARCH_AT91
1264         default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1265         default 100
1266
1267 config THUMB2_KERNEL
1268         bool "Compile the kernel in Thumb-2 mode"
1269         depends on CPU_V7 && EXPERIMENTAL
1270         select AEABI
1271         select ARM_ASM_UNIFIED
1272         help
1273           By enabling this option, the kernel will be compiled in
1274           Thumb-2 mode. A compiler/assembler that understand the unified
1275           ARM-Thumb syntax is needed.
1276
1277           If unsure, say N.
1278
1279 config ARM_ASM_UNIFIED
1280         bool
1281
1282 config AEABI
1283         bool "Use the ARM EABI to compile the kernel"
1284         help
1285           This option allows for the kernel to be compiled using the latest
1286           ARM ABI (aka EABI).  This is only useful if you are using a user
1287           space environment that is also compiled with EABI.
1288
1289           Since there are major incompatibilities between the legacy ABI and
1290           EABI, especially with regard to structure member alignment, this
1291           option also changes the kernel syscall calling convention to
1292           disambiguate both ABIs and allow for backward compatibility support
1293           (selected with CONFIG_OABI_COMPAT).
1294
1295           To use this you need GCC version 4.0.0 or later.
1296
1297 config OABI_COMPAT
1298         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1299         depends on AEABI && EXPERIMENTAL
1300         default y
1301         help
1302           This option preserves the old syscall interface along with the
1303           new (ARM EABI) one. It also provides a compatibility layer to
1304           intercept syscalls that have structure arguments which layout
1305           in memory differs between the legacy ABI and the new ARM EABI
1306           (only for non "thumb" binaries). This option adds a tiny
1307           overhead to all syscalls and produces a slightly larger kernel.
1308           If you know you'll be using only pure EABI user space then you
1309           can say N here. If this option is not selected and you attempt
1310           to execute a legacy ABI binary then the result will be
1311           UNPREDICTABLE (in fact it can be predicted that it won't work
1312           at all). If in doubt say Y.
1313
1314 config ARCH_HAS_HOLES_MEMORYMODEL
1315         bool
1316
1317 config ARCH_SPARSEMEM_ENABLE
1318         bool
1319
1320 config ARCH_SPARSEMEM_DEFAULT
1321         def_bool ARCH_SPARSEMEM_ENABLE
1322
1323 config ARCH_SELECT_MEMORY_MODEL
1324         def_bool ARCH_SPARSEMEM_ENABLE
1325
1326 config HIGHMEM
1327         bool "High Memory Support (EXPERIMENTAL)"
1328         depends on MMU && EXPERIMENTAL
1329         help
1330           The address space of ARM processors is only 4 Gigabytes large
1331           and it has to accommodate user address space, kernel address
1332           space as well as some memory mapped IO. That means that, if you
1333           have a large amount of physical memory and/or IO, not all of the
1334           memory can be "permanently mapped" by the kernel. The physical
1335           memory that is not permanently mapped is called "high memory".
1336
1337           Depending on the selected kernel/user memory split, minimum
1338           vmalloc space and actual amount of RAM, you may not need this
1339           option which should result in a slightly faster kernel.
1340
1341           If unsure, say n.
1342
1343 config HIGHPTE
1344         bool "Allocate 2nd-level pagetables from highmem"
1345         depends on HIGHMEM
1346         depends on !OUTER_CACHE
1347
1348 config HW_PERF_EVENTS
1349         bool "Enable hardware performance counter support for perf events"
1350         depends on PERF_EVENTS && CPU_HAS_PMU
1351         default y
1352         help
1353           Enable hardware performance counter support for perf events. If
1354           disabled, perf events will use software events only.
1355
1356 config SPARSE_IRQ
1357         def_bool n
1358         help
1359           This enables support for sparse irqs. This is useful in general
1360           as most CPUs have a fairly sparse array of IRQ vectors, which
1361           the irq_desc then maps directly on to. Systems with a high
1362           number of off-chip IRQs will want to treat this as
1363           experimental until they have been independently verified.
1364
1365 source "mm/Kconfig"
1366
1367 config FORCE_MAX_ZONEORDER
1368         int "Maximum zone order" if ARCH_SHMOBILE
1369         range 11 64 if ARCH_SHMOBILE
1370         default "9" if SA1111
1371         default "11"
1372         help
1373           The kernel memory allocator divides physically contiguous memory
1374           blocks into "zones", where each zone is a power of two number of
1375           pages.  This option selects the largest power of two that the kernel
1376           keeps in the memory allocator.  If you need to allocate very large
1377           blocks of physically contiguous memory, then you may need to
1378           increase this value.
1379
1380           This config option is actually maximum order plus one. For example,
1381           a value of 11 means that the largest free memory block is 2^10 pages.
1382
1383 config LEDS
1384         bool "Timer and CPU usage LEDs"
1385         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1386                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1387                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1388                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1389                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1390                    ARCH_AT91 || ARCH_DAVINCI || \
1391                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1392         help
1393           If you say Y here, the LEDs on your machine will be used
1394           to provide useful information about your current system status.
1395
1396           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1397           be able to select which LEDs are active using the options below. If
1398           you are compiling a kernel for the EBSA-110 or the LART however, the
1399           red LED will simply flash regularly to indicate that the system is
1400           still functional. It is safe to say Y here if you have a CATS
1401           system, but the driver will do nothing.
1402
1403 config LEDS_TIMER
1404         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1405                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1406                             || MACH_OMAP_PERSEUS2
1407         depends on LEDS
1408         depends on !GENERIC_CLOCKEVENTS
1409         default y if ARCH_EBSA110
1410         help
1411           If you say Y here, one of the system LEDs (the green one on the
1412           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1413           will flash regularly to indicate that the system is still
1414           operational. This is mainly useful to kernel hackers who are
1415           debugging unstable kernels.
1416
1417           The LART uses the same LED for both Timer LED and CPU usage LED
1418           functions. You may choose to use both, but the Timer LED function
1419           will overrule the CPU usage LED.
1420
1421 config LEDS_CPU
1422         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1423                         !ARCH_OMAP) \
1424                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1425                         || MACH_OMAP_PERSEUS2
1426         depends on LEDS
1427         help
1428           If you say Y here, the red LED will be used to give a good real
1429           time indication of CPU usage, by lighting whenever the idle task
1430           is not currently executing.
1431
1432           The LART uses the same LED for both Timer LED and CPU usage LED
1433           functions. You may choose to use both, but the Timer LED function
1434           will overrule the CPU usage LED.
1435
1436 config ALIGNMENT_TRAP
1437         bool
1438         depends on CPU_CP15_MMU
1439         default y if !ARCH_EBSA110
1440         select HAVE_PROC_CPU if PROC_FS
1441         help
1442           ARM processors cannot fetch/store information which is not
1443           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1444           address divisible by 4. On 32-bit ARM processors, these non-aligned
1445           fetch/store instructions will be emulated in software if you say
1446           here, which has a severe performance impact. This is necessary for
1447           correct operation of some network protocols. With an IP-only
1448           configuration it is safe to say N, otherwise say Y.
1449
1450 config UACCESS_WITH_MEMCPY
1451         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1452         depends on MMU && EXPERIMENTAL
1453         default y if CPU_FEROCEON
1454         help
1455           Implement faster copy_to_user and clear_user methods for CPU
1456           cores where a 8-word STM instruction give significantly higher
1457           memory write throughput than a sequence of individual 32bit stores.
1458
1459           A possible side effect is a slight increase in scheduling latency
1460           between threads sharing the same address space if they invoke
1461           such copy operations with large buffers.
1462
1463           However, if the CPU data cache is using a write-allocate mode,
1464           this option is unlikely to provide any performance gain.
1465
1466 config CC_STACKPROTECTOR
1467         bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1468         help
1469           This option turns on the -fstack-protector GCC feature. This
1470           feature puts, at the beginning of functions, a canary value on
1471           the stack just before the return address, and validates
1472           the value just before actually returning.  Stack based buffer
1473           overflows (that need to overwrite this return address) now also
1474           overwrite the canary, which gets detected and the attack is then
1475           neutralized via a kernel panic.
1476           This feature requires gcc version 4.2 or above.
1477
1478 config DEPRECATED_PARAM_STRUCT
1479         bool "Provide old way to pass kernel parameters"
1480         help
1481           This was deprecated in 2001 and announced to live on for 5 years.
1482           Some old boot loaders still use this way.
1483
1484 endmenu
1485
1486 menu "Boot options"
1487
1488 # Compressed boot loader in ROM.  Yes, we really want to ask about
1489 # TEXT and BSS so we preserve their values in the config files.
1490 config ZBOOT_ROM_TEXT
1491         hex "Compressed ROM boot loader base address"
1492         default "0"
1493         help
1494           The physical address at which the ROM-able zImage is to be
1495           placed in the target.  Platforms which normally make use of
1496           ROM-able zImage formats normally set this to a suitable
1497           value in their defconfig file.
1498
1499           If ZBOOT_ROM is not enabled, this has no effect.
1500
1501 config ZBOOT_ROM_BSS
1502         hex "Compressed ROM boot loader BSS address"
1503         default "0"
1504         help
1505           The base address of an area of read/write memory in the target
1506           for the ROM-able zImage which must be available while the
1507           decompressor is running. It must be large enough to hold the
1508           entire decompressed kernel plus an additional 128 KiB.
1509           Platforms which normally make use of ROM-able zImage formats
1510           normally set this to a suitable value in their defconfig file.
1511
1512           If ZBOOT_ROM is not enabled, this has no effect.
1513
1514 config ZBOOT_ROM
1515         bool "Compressed boot loader in ROM/flash"
1516         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1517         help
1518           Say Y here if you intend to execute your compressed kernel image
1519           (zImage) directly from ROM or flash.  If unsure, say N.
1520
1521 config CMDLINE
1522         string "Default kernel command string"
1523         default ""
1524         help
1525           On some architectures (EBSA110 and CATS), there is currently no way
1526           for the boot loader to pass arguments to the kernel. For these
1527           architectures, you should supply some command-line options at build
1528           time by entering them here. As a minimum, you should specify the
1529           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1530
1531 config CMDLINE_FORCE
1532         bool "Always use the default kernel command string"
1533         depends on CMDLINE != ""
1534         help
1535           Always use the default kernel command string, even if the boot
1536           loader passes other arguments to the kernel.
1537           This is useful if you cannot or don't want to change the
1538           command-line options your boot loader passes to the kernel.
1539
1540           If unsure, say N.
1541
1542 config XIP_KERNEL
1543         bool "Kernel Execute-In-Place from ROM"
1544         depends on !ZBOOT_ROM
1545         help
1546           Execute-In-Place allows the kernel to run from non-volatile storage
1547           directly addressable by the CPU, such as NOR flash. This saves RAM
1548           space since the text section of the kernel is not loaded from flash
1549           to RAM.  Read-write sections, such as the data section and stack,
1550           are still copied to RAM.  The XIP kernel is not compressed since
1551           it has to run directly from flash, so it will take more space to
1552           store it.  The flash address used to link the kernel object files,
1553           and for storing it, is configuration dependent. Therefore, if you
1554           say Y here, you must know the proper physical address where to
1555           store the kernel image depending on your own flash memory usage.
1556
1557           Also note that the make target becomes "make xipImage" rather than
1558           "make zImage" or "make Image".  The final kernel binary to put in
1559           ROM memory will be arch/arm/boot/xipImage.
1560
1561           If unsure, say N.
1562
1563 config XIP_PHYS_ADDR
1564         hex "XIP Kernel Physical Location"
1565         depends on XIP_KERNEL
1566         default "0x00080000"
1567         help
1568           This is the physical address in your flash memory the kernel will
1569           be linked for and stored to.  This address is dependent on your
1570           own flash usage.
1571
1572 config KEXEC
1573         bool "Kexec system call (EXPERIMENTAL)"
1574         depends on EXPERIMENTAL
1575         help
1576           kexec is a system call that implements the ability to shutdown your
1577           current kernel, and to start another kernel.  It is like a reboot
1578           but it is independent of the system firmware.   And like a reboot
1579           you can start any kernel with it, not just Linux.
1580
1581           It is an ongoing process to be certain the hardware in a machine
1582           is properly shutdown, so do not be surprised if this code does not
1583           initially work for you.  It may help to enable device hotplugging
1584           support.
1585
1586 config ATAGS_PROC
1587         bool "Export atags in procfs"
1588         depends on KEXEC
1589         default y
1590         help
1591           Should the atags used to boot the kernel be exported in an "atags"
1592           file in procfs. Useful with kexec.
1593
1594 config AUTO_ZRELADDR
1595         bool "Auto calculation of the decompressed kernel image address"
1596         depends on !ZBOOT_ROM && !ARCH_U300
1597         help
1598           ZRELADDR is the physical address where the decompressed kernel
1599           image will be placed. If AUTO_ZRELADDR is selected, the address
1600           will be determined at run-time by masking the current IP with
1601           0xf8000000. This assumes the zImage being placed in the first 128MB
1602           from start of memory.
1603
1604 endmenu
1605
1606 menu "CPU Power Management"
1607
1608 if ARCH_HAS_CPUFREQ
1609
1610 source "drivers/cpufreq/Kconfig"
1611
1612 config CPU_FREQ_SA1100
1613         bool
1614
1615 config CPU_FREQ_SA1110
1616         bool
1617
1618 config CPU_FREQ_INTEGRATOR
1619         tristate "CPUfreq driver for ARM Integrator CPUs"
1620         depends on ARCH_INTEGRATOR && CPU_FREQ
1621         default y
1622         help
1623           This enables the CPUfreq driver for ARM Integrator CPUs.
1624
1625           For details, take a look at <file:Documentation/cpu-freq>.
1626
1627           If in doubt, say Y.
1628
1629 config CPU_FREQ_PXA
1630         bool
1631         depends on CPU_FREQ && ARCH_PXA && PXA25x
1632         default y
1633         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1634
1635 config CPU_FREQ_S3C64XX
1636         bool "CPUfreq support for Samsung S3C64XX CPUs"
1637         depends on CPU_FREQ && CPU_S3C6410
1638
1639 config CPU_FREQ_S3C
1640         bool
1641         help
1642           Internal configuration node for common cpufreq on Samsung SoC
1643
1644 config CPU_FREQ_S3C24XX
1645         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1646         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1647         select CPU_FREQ_S3C
1648         help
1649           This enables the CPUfreq driver for the Samsung S3C24XX family
1650           of CPUs.
1651
1652           For details, take a look at <file:Documentation/cpu-freq>.
1653
1654           If in doubt, say N.
1655
1656 config CPU_FREQ_S3C24XX_PLL
1657         bool "Support CPUfreq changing of PLL frequency"
1658         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1659         help
1660           Compile in support for changing the PLL frequency from the
1661           S3C24XX series CPUfreq driver. The PLL takes time to settle
1662           after a frequency change, so by default it is not enabled.
1663
1664           This also means that the PLL tables for the selected CPU(s) will
1665           be built which may increase the size of the kernel image.
1666
1667 config CPU_FREQ_S3C24XX_DEBUG
1668         bool "Debug CPUfreq Samsung driver core"
1669         depends on CPU_FREQ_S3C24XX
1670         help
1671           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1672
1673 config CPU_FREQ_S3C24XX_IODEBUG
1674         bool "Debug CPUfreq Samsung driver IO timing"
1675         depends on CPU_FREQ_S3C24XX
1676         help
1677           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1678
1679 config CPU_FREQ_S3C24XX_DEBUGFS
1680         bool "Export debugfs for CPUFreq"
1681         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1682         help
1683           Export status information via debugfs.
1684
1685 endif
1686
1687 source "drivers/cpuidle/Kconfig"
1688
1689 endmenu
1690
1691 menu "Floating point emulation"
1692
1693 comment "At least one emulation must be selected"
1694
1695 config FPE_NWFPE
1696         bool "NWFPE math emulation"
1697         depends on !AEABI || OABI_COMPAT
1698         ---help---
1699           Say Y to include the NWFPE floating point emulator in the kernel.
1700           This is necessary to run most binaries. Linux does not currently
1701           support floating point hardware so you need to say Y here even if
1702           your machine has an FPA or floating point co-processor podule.
1703
1704           You may say N here if you are going to load the Acorn FPEmulator
1705           early in the bootup.
1706
1707 config FPE_NWFPE_XP
1708         bool "Support extended precision"
1709         depends on FPE_NWFPE
1710         help
1711           Say Y to include 80-bit support in the kernel floating-point
1712           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1713           Note that gcc does not generate 80-bit operations by default,
1714           so in most cases this option only enlarges the size of the
1715           floating point emulator without any good reason.
1716
1717           You almost surely want to say N here.
1718
1719 config FPE_FASTFPE
1720         bool "FastFPE math emulation (EXPERIMENTAL)"
1721         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1722         ---help---
1723           Say Y here to include the FAST floating point emulator in the kernel.
1724           This is an experimental much faster emulator which now also has full
1725           precision for the mantissa.  It does not support any exceptions.
1726           It is very simple, and approximately 3-6 times faster than NWFPE.
1727
1728           It should be sufficient for most programs.  It may be not suitable
1729           for scientific calculations, but you have to check this for yourself.
1730           If you do not feel you need a faster FP emulation you should better
1731           choose NWFPE.
1732
1733 config VFP
1734         bool "VFP-format floating point maths"
1735         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1736         help
1737           Say Y to include VFP support code in the kernel. This is needed
1738           if your hardware includes a VFP unit.
1739
1740           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1741           release notes and additional status information.
1742
1743           Say N if your target does not have VFP hardware.
1744
1745 config VFPv3
1746         bool
1747         depends on VFP
1748         default y if CPU_V7
1749
1750 config NEON
1751         bool "Advanced SIMD (NEON) Extension support"
1752         depends on VFPv3 && CPU_V7
1753         help
1754           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1755           Extension.
1756
1757 endmenu
1758
1759 menu "Userspace binary formats"
1760
1761 source "fs/Kconfig.binfmt"
1762
1763 config ARTHUR
1764         tristate "RISC OS personality"
1765         depends on !AEABI
1766         help
1767           Say Y here to include the kernel code necessary if you want to run
1768           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1769           experimental; if this sounds frightening, say N and sleep in peace.
1770           You can also say M here to compile this support as a module (which
1771           will be called arthur).
1772
1773 endmenu
1774
1775 menu "Power management options"
1776
1777 source "kernel/power/Kconfig"
1778
1779 config ARCH_SUSPEND_POSSIBLE
1780         def_bool y
1781
1782 endmenu
1783
1784 source "net/Kconfig"
1785
1786 source "drivers/Kconfig"
1787
1788 source "fs/Kconfig"
1789
1790 source "arch/arm/Kconfig.debug"
1791
1792 source "security/Kconfig"
1793
1794 source "crypto/Kconfig"
1795
1796 source "lib/Kconfig"