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 RTC_LIB
  14         select SYS_SUPPORTS_APM_EMULATION
  15         select GENERIC_ATOMIC64 if (!CPU_32v6K)
  16         select HAVE_OPROFILE
  17         select HAVE_ARCH_KGDB
  18         select HAVE_KPROBES if (!XIP_KERNEL)
  19         select HAVE_KRETPROBES if (HAVE_KPROBES)
  20         select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  21         select HAVE_GENERIC_DMA_COHERENT
  22         select HAVE_KERNEL_GZIP
  23         select HAVE_KERNEL_LZO
  24         select HAVE_PERF_EVENTS
  25         select PERF_USE_VMALLOC
  26         help
  27           The ARM series is a line of low-power-consumption RISC chip designs
  28           licensed by ARM Ltd and targeted at embedded applications and
  29           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  30           manufactured, but legacy ARM-based PC hardware remains popular in
  31           Europe.  There is an ARM Linux project with a web page at
  32           <http://www.arm.linux.org.uk/>.
  33
  34 config HAVE_PWM
  35         bool
  36
  37 config SYS_SUPPORTS_APM_EMULATION
  38         bool
  39
  40 config GENERIC_GPIO
  41         bool
  42
  43 config GENERIC_TIME
  44         bool
  45
  46 config GENERIC_CLOCKEVENTS
  47         bool
  48
  49 config GENERIC_CLOCKEVENTS_BROADCAST
  50         bool
  51         depends on GENERIC_CLOCKEVENTS
  52         default y if SMP && !LOCAL_TIMERS
  53
  54 config HAVE_TCM
  55         bool
  56         select GENERIC_ALLOCATOR
  57
  58 config HAVE_PROC_CPU
  59         bool
  60
  61 config NO_IOPORT
  62         bool
  63
  64 config EISA
  65         bool
  66         ---help---
  67           The Extended Industry Standard Architecture (EISA) bus was
  68           developed as an open alternative to the IBM MicroChannel bus.
  69
  70           The EISA bus provided some of the features of the IBM MicroChannel
  71           bus while maintaining backward compatibility with cards made for
  72           the older ISA bus.  The EISA bus saw limited use between 1988 and
  73           1995 when it was made obsolete by the PCI bus.
  74
  75           Say Y here if you are building a kernel for an EISA-based machine.
  76
  77           Otherwise, say N.
  78
  79 config SBUS
  80         bool
  81
  82 config MCA
  83         bool
  84         help
  85           MicroChannel Architecture is found in some IBM PS/2 machines and
  86           laptops.  It is a bus system similar to PCI or ISA. See
  87           <file:Documentation/mca.txt> (and especially the web page given
  88           there) before attempting to build an MCA bus kernel.
  89
  90 config GENERIC_HARDIRQS
  91         bool
  92         default y
  93
  94 config STACKTRACE_SUPPORT
  95         bool
  96         default y
  97
  98 config HAVE_LATENCYTOP_SUPPORT
  99         bool
 100         depends on !SMP
 101         default y
 102
 103 config LOCKDEP_SUPPORT
 104         bool
 105         default y
 106
 107 config TRACE_IRQFLAGS_SUPPORT
 108         bool
 109         default y
 110
 111 config HARDIRQS_SW_RESEND
 112         bool
 113         default y
 114
 115 config GENERIC_IRQ_PROBE
 116         bool
 117         default y
 118
 119 config GENERIC_LOCKBREAK
 120         bool
 121         default y
 122         depends on SMP && PREEMPT
 123
 124 config RWSEM_GENERIC_SPINLOCK
 125         bool
 126         default y
 127
 128 config RWSEM_XCHGADD_ALGORITHM
 129         bool
 130
 131 config ARCH_HAS_ILOG2_U32
 132         bool
 133
 134 config ARCH_HAS_ILOG2_U64
 135         bool
 136
 137 config ARCH_HAS_CPUFREQ
 138         bool
 139         help
 140           Internal node to signify that the ARCH has CPUFREQ support
 141           and that the relevant menu configurations are displayed for
 142           it.
 143
 144 config GENERIC_HWEIGHT
 145         bool
 146         default y
 147
 148 config GENERIC_CALIBRATE_DELAY
 149         bool
 150         default y
 151
 152 config ARCH_MAY_HAVE_PC_FDC
 153         bool
 154
 155 config ZONE_DMA
 156         bool
 157
 158 config NEED_DMA_MAP_STATE
 159        def_bool y
 160
 161 config GENERIC_ISA_DMA
 162         bool
 163
 164 config FIQ
 165         bool
 166
 167 config ARCH_MTD_XIP
 168         bool
 169
 170 config GENERIC_HARDIRQS_NO__DO_IRQ
 171         def_bool y
 172
 173 config ARM_L1_CACHE_SHIFT_6
 174         bool
 175         help
 176           Setting ARM L1 cache line size to 64 Bytes.
 177
 178 if OPROFILE
 179
 180 config OPROFILE_ARMV6
 181         def_bool y
 182         depends on CPU_V6 && !SMP
 183         select OPROFILE_ARM11_CORE
 184
 185 config OPROFILE_MPCORE
 186         def_bool y
 187         depends on CPU_V6 && SMP
 188         select OPROFILE_ARM11_CORE
 189
 190 config OPROFILE_ARM11_CORE
 191         bool
 192
 193 config OPROFILE_ARMV7
 194         def_bool y
 195         depends on CPU_V7 && !SMP
 196         bool
 197
 198 endif
 199
 200 config VECTORS_BASE
 201         hex
 202         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 203         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 204         default 0x00000000
 205         help
 206           The base address of exception vectors.
 207
 208 source "init/Kconfig"
 209
 210 source "kernel/Kconfig.freezer"
 211
 212 menu "System Type"
 213
 214 config MMU
 215         bool "MMU-based Paged Memory Management Support"
 216         default y
 217         help
 218           Select if you want MMU-based virtualised addressing space
 219           support by paged memory management. If unsure, say 'Y'.
 220
 221 #
 222 # The "ARM system type" choice list is ordered alphabetically by option
 223 # text.  Please add new entries in the option alphabetic order.
 224 #
 225 choice
 226         prompt "ARM system type"
 227         default ARCH_VERSATILE
 228
 229 config ARCH_AAEC2000
 230         bool "Agilent AAEC-2000 based"
 231         select CPU_ARM920T
 232         select ARM_AMBA
 233         select HAVE_CLK
 234         help
 235           This enables support for systems based on the Agilent AAEC-2000
 236
 237 config ARCH_INTEGRATOR
 238         bool "ARM Ltd. Integrator family"
 239         select ARM_AMBA
 240         select ARCH_HAS_CPUFREQ
 241         select HAVE_CLK
 242         select COMMON_CLKDEV
 243         select ICST525
 244         help
 245           Support for ARM's Integrator platform.
 246
 247 config ARCH_REALVIEW
 248         bool "ARM Ltd. RealView family"
 249         select ARM_AMBA
 250         select HAVE_CLK
 251         select COMMON_CLKDEV
 252         select ICST307
 253         select GENERIC_TIME
 254         select GENERIC_CLOCKEVENTS
 255         select ARCH_WANT_OPTIONAL_GPIOLIB
 256         help
 257           This enables support for ARM Ltd RealView boards.
 258
 259 config ARCH_VERSATILE
 260         bool "ARM Ltd. Versatile family"
 261         select ARM_AMBA
 262         select ARM_VIC
 263         select HAVE_CLK
 264         select COMMON_CLKDEV
 265         select ICST307
 266         select GENERIC_TIME
 267         select GENERIC_CLOCKEVENTS
 268         select ARCH_WANT_OPTIONAL_GPIOLIB
 269         help
 270           This enables support for ARM Ltd Versatile board.
 271
 272 config ARCH_AT91
 273         bool "Atmel AT91"
 274         select GENERIC_GPIO
 275         select ARCH_REQUIRE_GPIOLIB
 276         select HAVE_CLK
 277         help
 278           This enables support for systems based on the Atmel AT91RM9200,
 279           AT91SAM9 and AT91CAP9 processors.
 280
 281 config ARCH_BCMRING
 282         bool "Broadcom BCMRING"
 283         depends on MMU
 284         select CPU_V6
 285         select ARM_AMBA
 286         select COMMON_CLKDEV
 287         select GENERIC_TIME
 288         select GENERIC_CLOCKEVENTS
 289         select ARCH_WANT_OPTIONAL_GPIOLIB
 290         help
 291           Support for Broadcom's BCMRing platform.
 292
 293 config ARCH_CLPS711X
 294         bool "Cirrus Logic CLPS711x/EP721x-based"
 295         select CPU_ARM720T
 296         help
 297           Support for Cirrus Logic 711x/721x based boards.
 298
 299 config ARCH_GEMINI
 300         bool "Cortina Systems Gemini"
 301         select CPU_FA526
 302         select GENERIC_GPIO
 303         select ARCH_REQUIRE_GPIOLIB
 304         help
 305           Support for the Cortina Systems Gemini family SoCs
 306
 307 config ARCH_EBSA110
 308         bool "EBSA-110"
 309         select CPU_SA110
 310         select ISA
 311         select NO_IOPORT
 312         help
 313           This is an evaluation board for the StrongARM processor available
 314           from Digital. It has limited hardware on-board, including an
 315           Ethernet interface, two PCMCIA sockets, two serial ports and a
 316           parallel port.
 317
 318 config ARCH_EP93XX
 319         bool "EP93xx-based"
 320         select CPU_ARM920T
 321         select ARM_AMBA
 322         select ARM_VIC
 323         select GENERIC_GPIO
 324         select HAVE_CLK
 325         select COMMON_CLKDEV
 326         select ARCH_REQUIRE_GPIOLIB
 327         select ARCH_HAS_HOLES_MEMORYMODEL
 328         help
 329           This enables support for the Cirrus EP93xx series of CPUs.
 330
 331 config ARCH_FOOTBRIDGE
 332         bool "FootBridge"
 333         select CPU_SA110
 334         select FOOTBRIDGE
 335         help
 336           Support for systems based on the DC21285 companion chip
 337           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 338
 339 config ARCH_MXC
 340         bool "Freescale MXC/iMX-based"
 341         select GENERIC_TIME
 342         select GENERIC_CLOCKEVENTS
 343         select ARCH_REQUIRE_GPIOLIB
 344         select HAVE_CLK
 345         select COMMON_CLKDEV
 346         help
 347           Support for Freescale MXC/iMX-based family of processors
 348
 349 config ARCH_STMP3XXX
 350         bool "Freescale STMP3xxx"
 351         select CPU_ARM926T
 352         select HAVE_CLK
 353         select COMMON_CLKDEV
 354         select ARCH_REQUIRE_GPIOLIB
 355         select GENERIC_TIME
 356         select GENERIC_CLOCKEVENTS
 357         select GENERIC_GPIO
 358         select USB_ARCH_HAS_EHCI
 359         help
 360           Support for systems based on the Freescale 3xxx CPUs.
 361
 362 config ARCH_NETX
 363         bool "Hilscher NetX based"
 364         select CPU_ARM926T
 365         select ARM_VIC
 366         select GENERIC_CLOCKEVENTS
 367         select GENERIC_TIME
 368         help
 369           This enables support for systems based on the Hilscher NetX Soc
 370
 371 config ARCH_H720X
 372         bool "Hynix HMS720x-based"
 373         select CPU_ARM720T
 374         select ISA_DMA_API
 375         help
 376           This enables support for systems based on the Hynix HMS720x
 377
 378 config ARCH_IOP13XX
 379         bool "IOP13xx-based"
 380         depends on MMU
 381         select CPU_XSC3
 382         select PLAT_IOP
 383         select PCI
 384         select ARCH_SUPPORTS_MSI
 385         select VMSPLIT_1G
 386         help
 387           Support for Intel's IOP13XX (XScale) family of processors.
 388
 389 config ARCH_IOP32X
 390         bool "IOP32x-based"
 391         depends on MMU
 392         select CPU_XSCALE
 393         select PLAT_IOP
 394         select PCI
 395         select GENERIC_GPIO
 396         select ARCH_REQUIRE_GPIOLIB
 397         help
 398           Support for Intel's 80219 and IOP32X (XScale) family of
 399           processors.
 400
 401 config ARCH_IOP33X
 402         bool "IOP33x-based"
 403         depends on MMU
 404         select CPU_XSCALE
 405         select PLAT_IOP
 406         select PCI
 407         select GENERIC_GPIO
 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         help
 418           Support for Intel's IXP23xx (XScale) family of processors.
 419
 420 config ARCH_IXP2000
 421         bool "IXP2400/2800-based"
 422         depends on MMU
 423         select CPU_XSCALE
 424         select PCI
 425         help
 426           Support for Intel's IXP2400/2800 (XScale) family of processors.
 427
 428 config ARCH_IXP4XX
 429         bool "IXP4xx-based"
 430         depends on MMU
 431         select CPU_XSCALE
 432         select GENERIC_GPIO
 433         select GENERIC_TIME
 434         select GENERIC_CLOCKEVENTS
 435         select DMABOUNCE if PCI
 436         help
 437           Support for Intel's IXP4XX (XScale) family of processors.
 438
 439 config ARCH_L7200
 440         bool "LinkUp-L7200"
 441         select CPU_ARM720T
 442         select FIQ
 443         help
 444           Say Y here if you intend to run this kernel on a LinkUp Systems
 445           L7200 Software Development Board which uses an ARM720T processor.
 446           Information on this board can be obtained at:
 447
 448           <http://www.linkupsys.com/>
 449
 450           If you have any questions or comments about the Linux kernel port
 451           to this board, send e-mail to <sjhill@cotw.com>.
 452
 453 config ARCH_DOVE
 454         bool "Marvell Dove"
 455         select PCI
 456         select GENERIC_GPIO
 457         select ARCH_REQUIRE_GPIOLIB
 458         select GENERIC_TIME
 459         select GENERIC_CLOCKEVENTS
 460         select PLAT_ORION
 461         help
 462           Support for the Marvell Dove SoC 88AP510
 463
 464 config ARCH_KIRKWOOD
 465         bool "Marvell Kirkwood"
 466         select CPU_FEROCEON
 467         select PCI
 468         select GENERIC_GPIO
 469         select ARCH_REQUIRE_GPIOLIB
 470         select GENERIC_TIME
 471         select GENERIC_CLOCKEVENTS
 472         select PLAT_ORION
 473         help
 474           Support for the following Marvell Kirkwood series SoCs:
 475           88F6180, 88F6192 and 88F6281.
 476
 477 config ARCH_LOKI
 478         bool "Marvell Loki (88RC8480)"
 479         select CPU_FEROCEON
 480         select GENERIC_TIME
 481         select GENERIC_CLOCKEVENTS
 482         select PLAT_ORION
 483         help
 484           Support for the Marvell Loki (88RC8480) SoC.
 485
 486 config ARCH_MV78XX0
 487         bool "Marvell MV78xx0"
 488         select CPU_FEROCEON
 489         select PCI
 490         select GENERIC_GPIO
 491         select ARCH_REQUIRE_GPIOLIB
 492         select GENERIC_TIME
 493         select GENERIC_CLOCKEVENTS
 494         select PLAT_ORION
 495         help
 496           Support for the following Marvell MV78xx0 series SoCs:
 497           MV781x0, MV782x0.
 498
 499 config ARCH_ORION5X
 500         bool "Marvell Orion"
 501         depends on MMU
 502         select CPU_FEROCEON
 503         select PCI
 504         select GENERIC_GPIO
 505         select ARCH_REQUIRE_GPIOLIB
 506         select GENERIC_TIME
 507         select GENERIC_CLOCKEVENTS
 508         select PLAT_ORION
 509         help
 510           Support for the following Marvell Orion 5x series SoCs:
 511           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 512           Orion-2 (5281), Orion-1-90 (6183).
 513
 514 config ARCH_MMP
 515         bool "Marvell PXA168/910/MMP2"
 516         depends on MMU
 517         select GENERIC_GPIO
 518         select ARCH_REQUIRE_GPIOLIB
 519         select HAVE_CLK
 520         select COMMON_CLKDEV
 521         select GENERIC_TIME
 522         select GENERIC_CLOCKEVENTS
 523         select TICK_ONESHOT
 524         select PLAT_PXA
 525         help
 526           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 527
 528 config ARCH_KS8695
 529         bool "Micrel/Kendin KS8695"
 530         select CPU_ARM922T
 531         select GENERIC_GPIO
 532         select ARCH_REQUIRE_GPIOLIB
 533         help
 534           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 535           System-on-Chip devices.
 536
 537 config ARCH_NS9XXX
 538         bool "NetSilicon NS9xxx"
 539         select CPU_ARM926T
 540         select GENERIC_GPIO
 541         select GENERIC_TIME
 542         select GENERIC_CLOCKEVENTS
 543         select HAVE_CLK
 544         help
 545           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 546           System.
 547
 548           <http://www.digi.com/products/microprocessors/index.jsp>
 549
 550 config ARCH_W90X900
 551         bool "Nuvoton W90X900 CPU"
 552         select CPU_ARM926T
 553         select ARCH_REQUIRE_GPIOLIB
 554         select GENERIC_GPIO
 555         select HAVE_CLK
 556         select COMMON_CLKDEV
 557         select GENERIC_TIME
 558         select GENERIC_CLOCKEVENTS
 559         help
 560           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 561           At present, the w90x900 has been renamed nuc900, regarding
 562           the ARM series product line, you can login the following
 563           link address to know more.
 564
 565           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 566                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 567
 568 config ARCH_NUC93X
 569         bool "Nuvoton NUC93X CPU"
 570         select CPU_ARM926T
 571         select HAVE_CLK
 572         select COMMON_CLKDEV
 573         help
 574           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 575           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 576
 577 config ARCH_PNX4008
 578         bool "Philips Nexperia PNX4008 Mobile"
 579         select CPU_ARM926T
 580         select HAVE_CLK
 581         select COMMON_CLKDEV
 582         help
 583           This enables support for Philips PNX4008 mobile platform.
 584
 585 config ARCH_PXA
 586         bool "PXA2xx/PXA3xx-based"
 587         depends on MMU
 588         select ARCH_MTD_XIP
 589         select ARCH_HAS_CPUFREQ
 590         select GENERIC_GPIO
 591         select HAVE_CLK
 592         select COMMON_CLKDEV
 593         select ARCH_REQUIRE_GPIOLIB
 594         select GENERIC_TIME
 595         select GENERIC_CLOCKEVENTS
 596         select TICK_ONESHOT
 597         select PLAT_PXA
 598         help
 599           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 600
 601 config ARCH_MSM
 602         bool "Qualcomm MSM"
 603         select CPU_V6
 604         select GENERIC_TIME
 605         select GENERIC_CLOCKEVENTS
 606         help
 607           Support for Qualcomm MSM7K based systems.  This runs on the ARM11
 608           apps processor of the MSM7K and depends on a shared memory
 609           interface to the ARM9 modem processor which runs the baseband stack
 610           and controls some vital subsystems (clock and power control, etc).
 611
 612 config ARCH_SHMOBILE
 613         bool "Renesas SH-Mobile"
 614         help
 615           Support for Renesas's SH-Mobile ARM platforms
 616
 617 config ARCH_RPC
 618         bool "RiscPC"
 619         select ARCH_ACORN
 620         select FIQ
 621         select TIMER_ACORN
 622         select ARCH_MAY_HAVE_PC_FDC
 623         select HAVE_PATA_PLATFORM
 624         select ISA_DMA_API
 625         select NO_IOPORT
 626         select ARCH_SPARSEMEM_ENABLE
 627         help
 628           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 629           CD-ROM interface, serial and parallel port, and the floppy drive.
 630
 631 config ARCH_SA1100
 632         bool "SA1100-based"
 633         select CPU_SA1100
 634         select ISA
 635         select ARCH_SPARSEMEM_ENABLE
 636         select ARCH_MTD_XIP
 637         select ARCH_HAS_CPUFREQ
 638         select CPU_FREQ
 639         select GENERIC_GPIO
 640         select GENERIC_TIME
 641         select GENERIC_CLOCKEVENTS
 642         select HAVE_CLK
 643         select TICK_ONESHOT
 644         select ARCH_REQUIRE_GPIOLIB
 645         help
 646           Support for StrongARM 11x0 based boards.
 647
 648 config ARCH_S3C2410
 649         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 650         select GENERIC_GPIO
 651         select ARCH_HAS_CPUFREQ
 652         select HAVE_CLK
 653         help
 654           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 655           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 656           the Samsung SMDK2410 development board (and derivatives).
 657
 658 config ARCH_S3C64XX
 659         bool "Samsung S3C64XX"
 660         select PLAT_SAMSUNG
 661         select CPU_V6
 662         select GENERIC_GPIO
 663         select ARM_VIC
 664         select HAVE_CLK
 665         select NO_IOPORT
 666         select ARCH_HAS_CPUFREQ
 667         select ARCH_REQUIRE_GPIOLIB
 668         select SAMSUNG_CLKSRC
 669         select SAMSUNG_IRQ_VIC_TIMER
 670         select SAMSUNG_IRQ_UART
 671         select S3C_GPIO_TRACK
 672         select S3C_GPIO_PULL_UPDOWN
 673         select S3C_GPIO_CFG_S3C24XX
 674         select S3C_GPIO_CFG_S3C64XX
 675         select S3C_DEV_NAND
 676         select USB_ARCH_HAS_OHCI
 677         select SAMSUNG_GPIOLIB_4BIT
 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         help
 687           Samsung S5P6440 CPU based systems
 688
 689 config ARCH_S5P6442
 690         bool "Samsung S5P6442"
 691         select CPU_V6
 692         select GENERIC_GPIO
 693         select HAVE_CLK
 694         help
 695           Samsung S5P6442 CPU based systems
 696
 697 config ARCH_S5PC1XX
 698         bool "Samsung S5PC1XX"
 699         select GENERIC_GPIO
 700         select HAVE_CLK
 701         select CPU_V7
 702         select ARM_L1_CACHE_SHIFT_6
 703         help
 704           Samsung S5PC1XX series based systems
 705
 706 config ARCH_S5PV210
 707         bool "Samsung S5PV210/S5PC110"
 708         select CPU_V7
 709         select GENERIC_GPIO
 710         select HAVE_CLK
 711         select ARM_L1_CACHE_SHIFT_6
 712         help
 713           Samsung S5PV210/S5PC110 series based systems
 714
 715 config ARCH_SHARK
 716         bool "Shark"
 717         select CPU_SA110
 718         select ISA
 719         select ISA_DMA
 720         select ZONE_DMA
 721         select PCI
 722         help
 723           Support for the StrongARM based Digital DNARD machine, also known
 724           as "Shark" (<http://www.shark-linux.de/shark.html>).
 725
 726 config ARCH_LH7A40X
 727         bool "Sharp LH7A40X"
 728         select CPU_ARM922T
 729         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 730         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 731         help
 732           Say Y here for systems based on one of the Sharp LH7A40X
 733           System on a Chip processors.  These CPUs include an ARM922T
 734           core with a wide array of integrated devices for
 735           hand-held and low-power applications.
 736
 737 config ARCH_U300
 738         bool "ST-Ericsson U300 Series"
 739         depends on MMU
 740         select CPU_ARM926T
 741         select HAVE_TCM
 742         select ARM_AMBA
 743         select ARM_VIC
 744         select GENERIC_TIME
 745         select GENERIC_CLOCKEVENTS
 746         select HAVE_CLK
 747         select COMMON_CLKDEV
 748         select GENERIC_GPIO
 749         help
 750           Support for ST-Ericsson U300 series mobile platforms.
 751
 752 config ARCH_U8500
 753         bool "ST-Ericsson U8500 Series"
 754         select CPU_V7
 755         select ARM_AMBA
 756         select GENERIC_TIME
 757         select GENERIC_CLOCKEVENTS
 758         select COMMON_CLKDEV
 759         help
 760           Support for ST-Ericsson's Ux500 architecture
 761
 762 config ARCH_NOMADIK
 763         bool "STMicroelectronics Nomadik"
 764         select ARM_AMBA
 765         select ARM_VIC
 766         select CPU_ARM926T
 767         select HAVE_CLK
 768         select COMMON_CLKDEV
 769         select GENERIC_TIME
 770         select GENERIC_CLOCKEVENTS
 771         select GENERIC_GPIO
 772         select ARCH_REQUIRE_GPIOLIB
 773         help
 774           Support for the Nomadik platform by ST-Ericsson
 775
 776 config ARCH_DAVINCI
 777         bool "TI DaVinci"
 778         select CPU_ARM926T
 779         select GENERIC_TIME
 780         select GENERIC_CLOCKEVENTS
 781         select GENERIC_GPIO
 782         select ARCH_REQUIRE_GPIOLIB
 783         select HAVE_CLK
 784         select ZONE_DMA
 785         select HAVE_IDE
 786         select COMMON_CLKDEV
 787         select GENERIC_ALLOCATOR
 788         select ARCH_HAS_HOLES_MEMORYMODEL
 789         help
 790           Support for TI's DaVinci platform.
 791
 792 config ARCH_OMAP
 793         bool "TI OMAP"
 794         select GENERIC_GPIO
 795         select HAVE_CLK
 796         select ARCH_REQUIRE_GPIOLIB
 797         select ARCH_HAS_CPUFREQ
 798         select GENERIC_TIME
 799         select GENERIC_CLOCKEVENTS
 800         select ARCH_HAS_HOLES_MEMORYMODEL
 801         help
 802           Support for TI's OMAP platform (OMAP1 and OMAP2).
 803
 804 endchoice
 805
 806 #
 807 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 808 # Kconfigs may be included either alphabetically (according to the
 809 # plat- suffix) or along side the corresponding mach-* source.
 810 #
 811 source "arch/arm/mach-aaec2000/Kconfig"
 812
 813 source "arch/arm/mach-at91/Kconfig"
 814
 815 source "arch/arm/mach-bcmring/Kconfig"
 816
 817 source "arch/arm/mach-clps711x/Kconfig"
 818
 819 source "arch/arm/mach-davinci/Kconfig"
 820
 821 source "arch/arm/mach-dove/Kconfig"
 822
 823 source "arch/arm/mach-ep93xx/Kconfig"
 824
 825 source "arch/arm/mach-footbridge/Kconfig"
 826
 827 source "arch/arm/mach-gemini/Kconfig"
 828
 829 source "arch/arm/mach-h720x/Kconfig"
 830
 831 source "arch/arm/mach-integrator/Kconfig"
 832
 833 source "arch/arm/mach-iop32x/Kconfig"
 834
 835 source "arch/arm/mach-iop33x/Kconfig"
 836
 837 source "arch/arm/mach-iop13xx/Kconfig"
 838
 839 source "arch/arm/mach-ixp4xx/Kconfig"
 840
 841 source "arch/arm/mach-ixp2000/Kconfig"
 842
 843 source "arch/arm/mach-ixp23xx/Kconfig"
 844
 845 source "arch/arm/mach-kirkwood/Kconfig"
 846
 847 source "arch/arm/mach-ks8695/Kconfig"
 848
 849 source "arch/arm/mach-lh7a40x/Kconfig"
 850
 851 source "arch/arm/mach-loki/Kconfig"
 852
 853 source "arch/arm/mach-msm/Kconfig"
 854
 855 source "arch/arm/mach-mv78xx0/Kconfig"
 856
 857 source "arch/arm/plat-mxc/Kconfig"
 858
 859 source "arch/arm/mach-netx/Kconfig"
 860
 861 source "arch/arm/mach-nomadik/Kconfig"
 862 source "arch/arm/plat-nomadik/Kconfig"
 863
 864 source "arch/arm/mach-ns9xxx/Kconfig"
 865
 866 source "arch/arm/mach-nuc93x/Kconfig"
 867
 868 source "arch/arm/plat-omap/Kconfig"
 869
 870 source "arch/arm/mach-omap1/Kconfig"
 871
 872 source "arch/arm/mach-omap2/Kconfig"
 873
 874 source "arch/arm/mach-orion5x/Kconfig"
 875
 876 source "arch/arm/mach-pxa/Kconfig"
 877 source "arch/arm/plat-pxa/Kconfig"
 878
 879 source "arch/arm/mach-mmp/Kconfig"
 880
 881 source "arch/arm/mach-realview/Kconfig"
 882
 883 source "arch/arm/mach-sa1100/Kconfig"
 884
 885 source "arch/arm/plat-samsung/Kconfig"
 886 source "arch/arm/plat-s3c24xx/Kconfig"
 887 source "arch/arm/plat-s5p/Kconfig"
 888 source "arch/arm/plat-s5pc1xx/Kconfig"
 889
 890 if ARCH_S3C2410
 891 source "arch/arm/mach-s3c2400/Kconfig"
 892 source "arch/arm/mach-s3c2410/Kconfig"
 893 source "arch/arm/mach-s3c2412/Kconfig"
 894 source "arch/arm/mach-s3c2440/Kconfig"
 895 source "arch/arm/mach-s3c2443/Kconfig"
 896 endif
 897
 898 if ARCH_S3C64XX
 899 source "arch/arm/mach-s3c64xx/Kconfig"
 900 endif
 901
 902 source "arch/arm/mach-s5p6440/Kconfig"
 903
 904 source "arch/arm/mach-s5p6442/Kconfig"
 905
 906 if ARCH_S5PC1XX
 907 source "arch/arm/mach-s5pc100/Kconfig"
 908 endif
 909
 910 source "arch/arm/mach-s5pv210/Kconfig"
 911
 912 source "arch/arm/mach-shmobile/Kconfig"
 913
 914 source "arch/arm/plat-stmp3xxx/Kconfig"
 915
 916 source "arch/arm/mach-u300/Kconfig"
 917
 918 source "arch/arm/mach-ux500/Kconfig"
 919
 920 source "arch/arm/mach-versatile/Kconfig"
 921
 922 source "arch/arm/mach-w90x900/Kconfig"
 923
 924 # Definitions to make life easier
 925 config ARCH_ACORN
 926         bool
 927
 928 config PLAT_IOP
 929         bool
 930         select GENERIC_CLOCKEVENTS
 931         select GENERIC_TIME
 932
 933 config PLAT_ORION
 934         bool
 935
 936 config PLAT_PXA
 937         bool
 938
 939 source arch/arm/mm/Kconfig
 940
 941 config IWMMXT
 942         bool "Enable iWMMXt support"
 943         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 944         default y if PXA27x || PXA3xx || ARCH_MMP
 945         help
 946           Enable support for iWMMXt context switching at run time if
 947           running on a CPU that supports it.
 948
 949 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 950 config XSCALE_PMU
 951         bool
 952         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 953         default y
 954
 955 config CPU_HAS_PMU
 956         depends on CPU_V6 || CPU_V7 || XSCALE_PMU
 957         default y
 958         bool
 959
 960 if !MMU
 961 source "arch/arm/Kconfig-nommu"
 962 endif
 963
 964 config ARM_ERRATA_411920
 965         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 966         depends on CPU_V6 && !SMP
 967         help
 968           Invalidation of the Instruction Cache operation can
 969           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 970           It does not affect the MPCore. This option enables the ARM Ltd.
 971           recommended workaround.
 972
 973 config ARM_ERRATA_430973
 974         bool "ARM errata: Stale prediction on replaced interworking branch"
 975         depends on CPU_V7
 976         help
 977           This option enables the workaround for the 430973 Cortex-A8
 978           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 979           interworking branch is replaced with another code sequence at the
 980           same virtual address, whether due to self-modifying code or virtual
 981           to physical address re-mapping, Cortex-A8 does not recover from the
 982           stale interworking branch prediction. This results in Cortex-A8
 983           executing the new code sequence in the incorrect ARM or Thumb state.
 984           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 985           and also flushes the branch target cache at every context switch.
 986           Note that setting specific bits in the ACTLR register may not be
 987           available in non-secure mode.
 988
 989 config ARM_ERRATA_458693
 990         bool "ARM errata: Processor deadlock when a false hazard is created"
 991         depends on CPU_V7
 992         help
 993           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
 994           erratum. For very specific sequences of memory operations, it is
 995           possible for a hazard condition intended for a cache line to instead
 996           be incorrectly associated with a different cache line. This false
 997           hazard might then cause a processor deadlock. The workaround enables
 998           the L1 caching of the NEON accesses and disables the PLD instruction
 999           in the ACTLR register. Note that setting specific bits in the ACTLR
1000           register may not be available in non-secure mode.
1001
1002 config ARM_ERRATA_460075
1003         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1004         depends on CPU_V7
1005         help
1006           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1007           erratum. Any asynchronous access to the L2 cache may encounter a
1008           situation in which recent store transactions to the L2 cache are lost
1009           and overwritten with stale memory contents from external memory. The
1010           workaround disables the write-allocate mode for the L2 cache via the
1011           ACTLR register. Note that setting specific bits in the ACTLR register
1012           may not be available in non-secure mode.
1013
1014 config PL310_ERRATA_588369
1015         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1016         depends on CACHE_L2X0 && ARCH_OMAP4
1017         help
1018            The PL310 L2 cache controller implements three types of Clean &
1019            Invalidate maintenance operations: by Physical Address
1020            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1021            They are architecturally defined to behave as the execution of a
1022            clean operation followed immediately by an invalidate operation,
1023            both performing to the same memory location. This functionality
1024            is not correctly implemented in PL310 as clean lines are not
1025            invalidated as a result of these operations. Note that this errata
1026            uses Texas Instrument's secure monitor api.
1027 endmenu
1028
1029 source "arch/arm/common/Kconfig"
1030
1031 config FORCE_MAX_ZONEORDER
1032         int
1033         depends on SA1111
1034         default "9"
1035
1036 menu "Bus support"
1037
1038 config ARM_AMBA
1039         bool
1040
1041 config ISA
1042         bool
1043         help
1044           Find out whether you have ISA slots on your motherboard.  ISA is the
1045           name of a bus system, i.e. the way the CPU talks to the other stuff
1046           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1047           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1048           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1049
1050 # Select ISA DMA controller support
1051 config ISA_DMA
1052         bool
1053         select ISA_DMA_API
1054
1055 # Select ISA DMA interface
1056 config ISA_DMA_API
1057         bool
1058
1059 config PCI
1060         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1061         help
1062           Find out whether you have a PCI motherboard. PCI is the name of a
1063           bus system, i.e. the way the CPU talks to the other stuff inside
1064           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1065           VESA. If you have PCI, say Y, otherwise N.
1066
1067 config PCI_SYSCALL
1068         def_bool PCI
1069
1070 # Select the host bridge type
1071 config PCI_HOST_VIA82C505
1072         bool
1073         depends on PCI && ARCH_SHARK
1074         default y
1075
1076 config PCI_HOST_ITE8152
1077         bool
1078         depends on PCI && MACH_ARMCORE
1079         default y
1080         select DMABOUNCE
1081
1082 source "drivers/pci/Kconfig"
1083
1084 source "drivers/pcmcia/Kconfig"
1085
1086 endmenu
1087
1088 menu "Kernel Features"
1089
1090 source "kernel/time/Kconfig"
1091
1092 config SMP
1093         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1094         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1095                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1096         depends on GENERIC_CLOCKEVENTS
1097         select USE_GENERIC_SMP_HELPERS
1098         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1099         help
1100           This enables support for systems with more than one CPU. If you have
1101           a system with only one CPU, like most personal computers, say N. If
1102           you have a system with more than one CPU, say Y.
1103
1104           If you say N here, the kernel will run on single and multiprocessor
1105           machines, but will use only one CPU of a multiprocessor machine. If
1106           you say Y here, the kernel will run on many, but not all, single
1107           processor machines. On a single processor machine, the kernel will
1108           run faster if you say N here.
1109
1110           See also <file:Documentation/i386/IO-APIC.txt>,
1111           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1112           <http://www.linuxdoc.org/docs.html#howto>.
1113
1114           If you don't know what to do here, say N.
1115
1116 config HAVE_ARM_SCU
1117         bool
1118         depends on SMP
1119         help
1120           This option enables support for the ARM system coherency unit
1121
1122 config HAVE_ARM_TWD
1123         bool
1124         depends on SMP
1125         help
1126           This options enables support for the ARM timer and watchdog unit
1127
1128 choice
1129         prompt "Memory split"
1130         default VMSPLIT_3G
1131         help
1132           Select the desired split between kernel and user memory.
1133
1134           If you are not absolutely sure what you are doing, leave this
1135           option alone!
1136
1137         config VMSPLIT_3G
1138                 bool "3G/1G user/kernel split"
1139         config VMSPLIT_2G
1140                 bool "2G/2G user/kernel split"
1141         config VMSPLIT_1G
1142                 bool "1G/3G user/kernel split"
1143 endchoice
1144
1145 config PAGE_OFFSET
1146         hex
1147         default 0x40000000 if VMSPLIT_1G
1148         default 0x80000000 if VMSPLIT_2G
1149         default 0xC0000000
1150
1151 config NR_CPUS
1152         int "Maximum number of CPUs (2-32)"
1153         range 2 32
1154         depends on SMP
1155         default "4"
1156
1157 config HOTPLUG_CPU
1158         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1159         depends on SMP && HOTPLUG && EXPERIMENTAL
1160         help
1161           Say Y here to experiment with turning CPUs off and on.  CPUs
1162           can be controlled through /sys/devices/system/cpu.
1163
1164 config LOCAL_TIMERS
1165         bool "Use local timer interrupts"
1166         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1167                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1168         default y
1169         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1170         help
1171           Enable support for local timers on SMP platforms, rather then the
1172           legacy IPI broadcast method.  Local timers allows the system
1173           accounting to be spread across the timer interval, preventing a
1174           "thundering herd" at every timer tick.
1175
1176 source kernel/Kconfig.preempt
1177
1178 config HZ
1179         int
1180         default 128 if ARCH_L7200
1181         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
1182         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1183         default AT91_TIMER_HZ if ARCH_AT91
1184         default 100
1185
1186 config THUMB2_KERNEL
1187         bool "Compile the kernel in Thumb-2 mode"
1188         depends on CPU_V7 && EXPERIMENTAL
1189         select AEABI
1190         select ARM_ASM_UNIFIED
1191         help
1192           By enabling this option, the kernel will be compiled in
1193           Thumb-2 mode. A compiler/assembler that understand the unified
1194           ARM-Thumb syntax is needed.
1195
1196           If unsure, say N.
1197
1198 config ARM_ASM_UNIFIED
1199         bool
1200
1201 config AEABI
1202         bool "Use the ARM EABI to compile the kernel"
1203         help
1204           This option allows for the kernel to be compiled using the latest
1205           ARM ABI (aka EABI).  This is only useful if you are using a user
1206           space environment that is also compiled with EABI.
1207
1208           Since there are major incompatibilities between the legacy ABI and
1209           EABI, especially with regard to structure member alignment, this
1210           option also changes the kernel syscall calling convention to
1211           disambiguate both ABIs and allow for backward compatibility support
1212           (selected with CONFIG_OABI_COMPAT).
1213
1214           To use this you need GCC version 4.0.0 or later.
1215
1216 config OABI_COMPAT
1217         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1218         depends on AEABI && EXPERIMENTAL
1219         default y
1220         help
1221           This option preserves the old syscall interface along with the
1222           new (ARM EABI) one. It also provides a compatibility layer to
1223           intercept syscalls that have structure arguments which layout
1224           in memory differs between the legacy ABI and the new ARM EABI
1225           (only for non "thumb" binaries). This option adds a tiny
1226           overhead to all syscalls and produces a slightly larger kernel.
1227           If you know you'll be using only pure EABI user space then you
1228           can say N here. If this option is not selected and you attempt
1229           to execute a legacy ABI binary then the result will be
1230           UNPREDICTABLE (in fact it can be predicted that it won't work
1231           at all). If in doubt say Y.
1232
1233 config ARCH_HAS_HOLES_MEMORYMODEL
1234         bool
1235
1236 # Discontigmem is deprecated
1237 config ARCH_DISCONTIGMEM_ENABLE
1238         bool
1239
1240 config ARCH_SPARSEMEM_ENABLE
1241         bool
1242
1243 config ARCH_SPARSEMEM_DEFAULT
1244         def_bool ARCH_SPARSEMEM_ENABLE
1245
1246 config ARCH_SELECT_MEMORY_MODEL
1247         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1248
1249 config NODES_SHIFT
1250         int
1251         default "4" if ARCH_LH7A40X
1252         default "2"
1253         depends on NEED_MULTIPLE_NODES
1254
1255 config HIGHMEM
1256         bool "High Memory Support (EXPERIMENTAL)"
1257         depends on MMU && EXPERIMENTAL
1258         help
1259           The address space of ARM processors is only 4 Gigabytes large
1260           and it has to accommodate user address space, kernel address
1261           space as well as some memory mapped IO. That means that, if you
1262           have a large amount of physical memory and/or IO, not all of the
1263           memory can be "permanently mapped" by the kernel. The physical
1264           memory that is not permanently mapped is called "high memory".
1265
1266           Depending on the selected kernel/user memory split, minimum
1267           vmalloc space and actual amount of RAM, you may not need this
1268           option which should result in a slightly faster kernel.
1269
1270           If unsure, say n.
1271
1272 config HIGHPTE
1273         bool "Allocate 2nd-level pagetables from highmem"
1274         depends on HIGHMEM
1275         depends on !OUTER_CACHE
1276
1277 config HW_PERF_EVENTS
1278         bool "Enable hardware performance counter support for perf events"
1279         depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
1280         default y
1281         help
1282           Enable hardware performance counter support for perf events. If
1283           disabled, perf events will use software events only.
1284
1285 source "mm/Kconfig"
1286
1287 config LEDS
1288         bool "Timer and CPU usage LEDs"
1289         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1290                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1291                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1292                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1293                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1294                    ARCH_AT91 || ARCH_DAVINCI || \
1295                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1296         help
1297           If you say Y here, the LEDs on your machine will be used
1298           to provide useful information about your current system status.
1299
1300           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1301           be able to select which LEDs are active using the options below. If
1302           you are compiling a kernel for the EBSA-110 or the LART however, the
1303           red LED will simply flash regularly to indicate that the system is
1304           still functional. It is safe to say Y here if you have a CATS
1305           system, but the driver will do nothing.
1306
1307 config LEDS_TIMER
1308         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1309                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1310                             || MACH_OMAP_PERSEUS2
1311         depends on LEDS
1312         depends on !GENERIC_CLOCKEVENTS
1313         default y if ARCH_EBSA110
1314         help
1315           If you say Y here, one of the system LEDs (the green one on the
1316           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1317           will flash regularly to indicate that the system is still
1318           operational. This is mainly useful to kernel hackers who are
1319           debugging unstable kernels.
1320
1321           The LART uses the same LED for both Timer LED and CPU usage LED
1322           functions. You may choose to use both, but the Timer LED function
1323           will overrule the CPU usage LED.
1324
1325 config LEDS_CPU
1326         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1327                         !ARCH_OMAP) \
1328                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1329                         || MACH_OMAP_PERSEUS2
1330         depends on LEDS
1331         help
1332           If you say Y here, the red LED will be used to give a good real
1333           time indication of CPU usage, by lighting whenever the idle task
1334           is not currently executing.
1335
1336           The LART uses the same LED for both Timer LED and CPU usage LED
1337           functions. You may choose to use both, but the Timer LED function
1338           will overrule the CPU usage LED.
1339
1340 config ALIGNMENT_TRAP
1341         bool
1342         depends on CPU_CP15_MMU
1343         default y if !ARCH_EBSA110
1344         select HAVE_PROC_CPU if PROC_FS
1345         help
1346           ARM processors cannot fetch/store information which is not
1347           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1348           address divisible by 4. On 32-bit ARM processors, these non-aligned
1349           fetch/store instructions will be emulated in software if you say
1350           here, which has a severe performance impact. This is necessary for
1351           correct operation of some network protocols. With an IP-only
1352           configuration it is safe to say N, otherwise say Y.
1353
1354 config UACCESS_WITH_MEMCPY
1355         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1356         depends on MMU && EXPERIMENTAL
1357         default y if CPU_FEROCEON
1358         help
1359           Implement faster copy_to_user and clear_user methods for CPU
1360           cores where a 8-word STM instruction give significantly higher
1361           memory write throughput than a sequence of individual 32bit stores.
1362
1363           A possible side effect is a slight increase in scheduling latency
1364           between threads sharing the same address space if they invoke
1365           such copy operations with large buffers.
1366
1367           However, if the CPU data cache is using a write-allocate mode,
1368           this option is unlikely to provide any performance gain.
1369
1370 endmenu
1371
1372 menu "Boot options"
1373
1374 # Compressed boot loader in ROM.  Yes, we really want to ask about
1375 # TEXT and BSS so we preserve their values in the config files.
1376 config ZBOOT_ROM_TEXT
1377         hex "Compressed ROM boot loader base address"
1378         default "0"
1379         help
1380           The physical address at which the ROM-able zImage is to be
1381           placed in the target.  Platforms which normally make use of
1382           ROM-able zImage formats normally set this to a suitable
1383           value in their defconfig file.
1384
1385           If ZBOOT_ROM is not enabled, this has no effect.
1386
1387 config ZBOOT_ROM_BSS
1388         hex "Compressed ROM boot loader BSS address"
1389         default "0"
1390         help
1391           The base address of an area of read/write memory in the target
1392           for the ROM-able zImage which must be available while the
1393           decompressor is running. It must be large enough to hold the
1394           entire decompressed kernel plus an additional 128 KiB.
1395           Platforms which normally make use of ROM-able zImage formats
1396           normally set this to a suitable value in their defconfig file.
1397
1398           If ZBOOT_ROM is not enabled, this has no effect.
1399
1400 config ZBOOT_ROM
1401         bool "Compressed boot loader in ROM/flash"
1402         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1403         help
1404           Say Y here if you intend to execute your compressed kernel image
1405           (zImage) directly from ROM or flash.  If unsure, say N.
1406
1407 config CMDLINE
1408         string "Default kernel command string"
1409         default ""
1410         help
1411           On some architectures (EBSA110 and CATS), there is currently no way
1412           for the boot loader to pass arguments to the kernel. For these
1413           architectures, you should supply some command-line options at build
1414           time by entering them here. As a minimum, you should specify the
1415           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1416
1417 config XIP_KERNEL
1418         bool "Kernel Execute-In-Place from ROM"
1419         depends on !ZBOOT_ROM
1420         help
1421           Execute-In-Place allows the kernel to run from non-volatile storage
1422           directly addressable by the CPU, such as NOR flash. This saves RAM
1423           space since the text section of the kernel is not loaded from flash
1424           to RAM.  Read-write sections, such as the data section and stack,
1425           are still copied to RAM.  The XIP kernel is not compressed since
1426           it has to run directly from flash, so it will take more space to
1427           store it.  The flash address used to link the kernel object files,
1428           and for storing it, is configuration dependent. Therefore, if you
1429           say Y here, you must know the proper physical address where to
1430           store the kernel image depending on your own flash memory usage.
1431
1432           Also note that the make target becomes "make xipImage" rather than
1433           "make zImage" or "make Image".  The final kernel binary to put in
1434           ROM memory will be arch/arm/boot/xipImage.
1435
1436           If unsure, say N.
1437
1438 config XIP_PHYS_ADDR
1439         hex "XIP Kernel Physical Location"
1440         depends on XIP_KERNEL
1441         default "0x00080000"
1442         help
1443           This is the physical address in your flash memory the kernel will
1444           be linked for and stored to.  This address is dependent on your
1445           own flash usage.
1446
1447 config KEXEC
1448         bool "Kexec system call (EXPERIMENTAL)"
1449         depends on EXPERIMENTAL
1450         help
1451           kexec is a system call that implements the ability to shutdown your
1452           current kernel, and to start another kernel.  It is like a reboot
1453           but it is independent of the system firmware.   And like a reboot
1454           you can start any kernel with it, not just Linux.
1455
1456           It is an ongoing process to be certain the hardware in a machine
1457           is properly shutdown, so do not be surprised if this code does not
1458           initially work for you.  It may help to enable device hotplugging
1459           support.
1460
1461 config ATAGS_PROC
1462         bool "Export atags in procfs"
1463         depends on KEXEC
1464         default y
1465         help
1466           Should the atags used to boot the kernel be exported in an "atags"
1467           file in procfs. Useful with kexec.
1468
1469 endmenu
1470
1471 menu "CPU Power Management"
1472
1473 if ARCH_HAS_CPUFREQ
1474
1475 source "drivers/cpufreq/Kconfig"
1476
1477 config CPU_FREQ_SA1100
1478         bool
1479
1480 config CPU_FREQ_SA1110
1481         bool
1482
1483 config CPU_FREQ_INTEGRATOR
1484         tristate "CPUfreq driver for ARM Integrator CPUs"
1485         depends on ARCH_INTEGRATOR && CPU_FREQ
1486         default y
1487         help
1488           This enables the CPUfreq driver for ARM Integrator CPUs.
1489
1490           For details, take a look at <file:Documentation/cpu-freq>.
1491
1492           If in doubt, say Y.
1493
1494 config CPU_FREQ_PXA
1495         bool
1496         depends on CPU_FREQ && ARCH_PXA && PXA25x
1497         default y
1498         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1499
1500 config CPU_FREQ_S3C64XX
1501         bool "CPUfreq support for Samsung S3C64XX CPUs"
1502         depends on CPU_FREQ && CPU_S3C6410
1503
1504 config CPU_FREQ_S3C
1505         bool
1506         help
1507           Internal configuration node for common cpufreq on Samsung SoC
1508
1509 config CPU_FREQ_S3C24XX
1510         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1511         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1512         select CPU_FREQ_S3C
1513         help
1514           This enables the CPUfreq driver for the Samsung S3C24XX family
1515           of CPUs.
1516
1517           For details, take a look at <file:Documentation/cpu-freq>.
1518
1519           If in doubt, say N.
1520
1521 config CPU_FREQ_S3C24XX_PLL
1522         bool "Support CPUfreq changing of PLL frequency"
1523         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1524         help
1525           Compile in support for changing the PLL frequency from the
1526           S3C24XX series CPUfreq driver. The PLL takes time to settle
1527           after a frequency change, so by default it is not enabled.
1528
1529           This also means that the PLL tables for the selected CPU(s) will
1530           be built which may increase the size of the kernel image.
1531
1532 config CPU_FREQ_S3C24XX_DEBUG
1533         bool "Debug CPUfreq Samsung driver core"
1534         depends on CPU_FREQ_S3C24XX
1535         help
1536           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1537
1538 config CPU_FREQ_S3C24XX_IODEBUG
1539         bool "Debug CPUfreq Samsung driver IO timing"
1540         depends on CPU_FREQ_S3C24XX
1541         help
1542           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1543
1544 config CPU_FREQ_S3C24XX_DEBUGFS
1545         bool "Export debugfs for CPUFreq"
1546         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1547         help
1548           Export status information via debugfs.
1549
1550 endif
1551
1552 source "drivers/cpuidle/Kconfig"
1553
1554 endmenu
1555
1556 menu "Floating point emulation"
1557
1558 comment "At least one emulation must be selected"
1559
1560 config FPE_NWFPE
1561         bool "NWFPE math emulation"
1562         depends on !AEABI || OABI_COMPAT
1563         ---help---
1564           Say Y to include the NWFPE floating point emulator in the kernel.
1565           This is necessary to run most binaries. Linux does not currently
1566           support floating point hardware so you need to say Y here even if
1567           your machine has an FPA or floating point co-processor podule.
1568
1569           You may say N here if you are going to load the Acorn FPEmulator
1570           early in the bootup.
1571
1572 config FPE_NWFPE_XP
1573         bool "Support extended precision"
1574         depends on FPE_NWFPE
1575         help
1576           Say Y to include 80-bit support in the kernel floating-point
1577           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1578           Note that gcc does not generate 80-bit operations by default,
1579           so in most cases this option only enlarges the size of the
1580           floating point emulator without any good reason.
1581
1582           You almost surely want to say N here.
1583
1584 config FPE_FASTFPE
1585         bool "FastFPE math emulation (EXPERIMENTAL)"
1586         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1587         ---help---
1588           Say Y here to include the FAST floating point emulator in the kernel.
1589           This is an experimental much faster emulator which now also has full
1590           precision for the mantissa.  It does not support any exceptions.
1591           It is very simple, and approximately 3-6 times faster than NWFPE.
1592
1593           It should be sufficient for most programs.  It may be not suitable
1594           for scientific calculations, but you have to check this for yourself.
1595           If you do not feel you need a faster FP emulation you should better
1596           choose NWFPE.
1597
1598 config VFP
1599         bool "VFP-format floating point maths"
1600         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1601         help
1602           Say Y to include VFP support code in the kernel. This is needed
1603           if your hardware includes a VFP unit.
1604
1605           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1606           release notes and additional status information.
1607
1608           Say N if your target does not have VFP hardware.
1609
1610 config VFPv3
1611         bool
1612         depends on VFP
1613         default y if CPU_V7
1614
1615 config NEON
1616         bool "Advanced SIMD (NEON) Extension support"
1617         depends on VFPv3 && CPU_V7
1618         help
1619           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1620           Extension.
1621
1622 endmenu
1623
1624 menu "Userspace binary formats"
1625
1626 source "fs/Kconfig.binfmt"
1627
1628 config ARTHUR
1629         tristate "RISC OS personality"
1630         depends on !AEABI
1631         help
1632           Say Y here to include the kernel code necessary if you want to run
1633           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1634           experimental; if this sounds frightening, say N and sleep in peace.
1635           You can also say M here to compile this support as a module (which
1636           will be called arthur).
1637
1638 endmenu
1639
1640 menu "Power management options"
1641
1642 source "kernel/power/Kconfig"
1643
1644 config ARCH_SUSPEND_POSSIBLE
1645         def_bool y
1646
1647 endmenu
1648
1649 source "net/Kconfig"
1650
1651 source "drivers/Kconfig"
1652
1653 source "fs/Kconfig"
1654
1655 source "arch/arm/Kconfig.debug"
1656
1657 source "security/Kconfig"
1658
1659 source "crypto/Kconfig"
1660
1661 source "lib/Kconfig"