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 ICST
 244         select GENERIC_TIME
 245         select GENERIC_CLOCKEVENTS
 246         select PLAT_VERSATILE
 247         help
 248           Support for ARM's Integrator platform.
 249
 250 config ARCH_REALVIEW
 251         bool "ARM Ltd. RealView family"
 252         select ARM_AMBA
 253         select HAVE_CLK
 254         select COMMON_CLKDEV
 255         select ICST
 256         select GENERIC_TIME
 257         select GENERIC_CLOCKEVENTS
 258         select ARCH_WANT_OPTIONAL_GPIOLIB
 259         select PLAT_VERSATILE
 260         help
 261           This enables support for ARM Ltd RealView boards.
 262
 263 config ARCH_VERSATILE
 264         bool "ARM Ltd. Versatile family"
 265         select ARM_AMBA
 266         select ARM_VIC
 267         select HAVE_CLK
 268         select COMMON_CLKDEV
 269         select ICST
 270         select GENERIC_TIME
 271         select GENERIC_CLOCKEVENTS
 272         select ARCH_WANT_OPTIONAL_GPIOLIB
 273         select PLAT_VERSATILE
 274         help
 275           This enables support for ARM Ltd Versatile board.
 276
 277 config ARCH_AT91
 278         bool "Atmel AT91"
 279         select GENERIC_GPIO
 280         select ARCH_REQUIRE_GPIOLIB
 281         select HAVE_CLK
 282         help
 283           This enables support for systems based on the Atmel AT91RM9200,
 284           AT91SAM9 and AT91CAP9 processors.
 285
 286 config ARCH_BCMRING
 287         bool "Broadcom BCMRING"
 288         depends on MMU
 289         select CPU_V6
 290         select ARM_AMBA
 291         select COMMON_CLKDEV
 292         select GENERIC_TIME
 293         select GENERIC_CLOCKEVENTS
 294         select ARCH_WANT_OPTIONAL_GPIOLIB
 295         help
 296           Support for Broadcom's BCMRing platform.
 297
 298 config ARCH_CLPS711X
 299         bool "Cirrus Logic CLPS711x/EP721x-based"
 300         select CPU_ARM720T
 301         help
 302           Support for Cirrus Logic 711x/721x based boards.
 303
 304 config ARCH_GEMINI
 305         bool "Cortina Systems Gemini"
 306         select CPU_FA526
 307         select GENERIC_GPIO
 308         select ARCH_REQUIRE_GPIOLIB
 309         help
 310           Support for the Cortina Systems Gemini family SoCs
 311
 312 config ARCH_EBSA110
 313         bool "EBSA-110"
 314         select CPU_SA110
 315         select ISA
 316         select NO_IOPORT
 317         help
 318           This is an evaluation board for the StrongARM processor available
 319           from Digital. It has limited hardware on-board, including an
 320           Ethernet interface, two PCMCIA sockets, two serial ports and a
 321           parallel port.
 322
 323 config ARCH_EP93XX
 324         bool "EP93xx-based"
 325         select CPU_ARM920T
 326         select ARM_AMBA
 327         select ARM_VIC
 328         select GENERIC_GPIO
 329         select HAVE_CLK
 330         select COMMON_CLKDEV
 331         select ARCH_REQUIRE_GPIOLIB
 332         select ARCH_HAS_HOLES_MEMORYMODEL
 333         help
 334           This enables support for the Cirrus EP93xx series of CPUs.
 335
 336 config ARCH_FOOTBRIDGE
 337         bool "FootBridge"
 338         select CPU_SA110
 339         select FOOTBRIDGE
 340         help
 341           Support for systems based on the DC21285 companion chip
 342           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 343
 344 config ARCH_MXC
 345         bool "Freescale MXC/iMX-based"
 346         select GENERIC_TIME
 347         select GENERIC_CLOCKEVENTS
 348         select ARCH_REQUIRE_GPIOLIB
 349         select HAVE_CLK
 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 HAVE_CLK
 358         select COMMON_CLKDEV
 359         select ARCH_REQUIRE_GPIOLIB
 360         select GENERIC_TIME
 361         select GENERIC_CLOCKEVENTS
 362         select GENERIC_GPIO
 363         select USB_ARCH_HAS_EHCI
 364         help
 365           Support for systems based on the Freescale 3xxx CPUs.
 366
 367 config ARCH_NETX
 368         bool "Hilscher NetX based"
 369         select CPU_ARM926T
 370         select ARM_VIC
 371         select GENERIC_CLOCKEVENTS
 372         select GENERIC_TIME
 373         help
 374           This enables support for systems based on the Hilscher NetX Soc
 375
 376 config ARCH_H720X
 377         bool "Hynix HMS720x-based"
 378         select CPU_ARM720T
 379         select ISA_DMA_API
 380         help
 381           This enables support for systems based on the Hynix HMS720x
 382
 383 config ARCH_IOP13XX
 384         bool "IOP13xx-based"
 385         depends on MMU
 386         select CPU_XSC3
 387         select PLAT_IOP
 388         select PCI
 389         select ARCH_SUPPORTS_MSI
 390         select VMSPLIT_1G
 391         help
 392           Support for Intel's IOP13XX (XScale) family of processors.
 393
 394 config ARCH_IOP32X
 395         bool "IOP32x-based"
 396         depends on MMU
 397         select CPU_XSCALE
 398         select PLAT_IOP
 399         select PCI
 400         select GENERIC_GPIO
 401         select ARCH_REQUIRE_GPIOLIB
 402         help
 403           Support for Intel's 80219 and IOP32X (XScale) family of
 404           processors.
 405
 406 config ARCH_IOP33X
 407         bool "IOP33x-based"
 408         depends on MMU
 409         select CPU_XSCALE
 410         select PLAT_IOP
 411         select PCI
 412         select GENERIC_GPIO
 413         select ARCH_REQUIRE_GPIOLIB
 414         help
 415           Support for Intel's IOP33X (XScale) family of processors.
 416
 417 config ARCH_IXP23XX
 418         bool "IXP23XX-based"
 419         depends on MMU
 420         select CPU_XSC3
 421         select PCI
 422         help
 423           Support for Intel's IXP23xx (XScale) family of processors.
 424
 425 config ARCH_IXP2000
 426         bool "IXP2400/2800-based"
 427         depends on MMU
 428         select CPU_XSCALE
 429         select PCI
 430         help
 431           Support for Intel's IXP2400/2800 (XScale) family of processors.
 432
 433 config ARCH_IXP4XX
 434         bool "IXP4xx-based"
 435         depends on MMU
 436         select CPU_XSCALE
 437         select GENERIC_GPIO
 438         select GENERIC_TIME
 439         select GENERIC_CLOCKEVENTS
 440         select DMABOUNCE if PCI
 441         help
 442           Support for Intel's IXP4XX (XScale) family of processors.
 443
 444 config ARCH_L7200
 445         bool "LinkUp-L7200"
 446         select CPU_ARM720T
 447         select FIQ
 448         help
 449           Say Y here if you intend to run this kernel on a LinkUp Systems
 450           L7200 Software Development Board which uses an ARM720T processor.
 451           Information on this board can be obtained at:
 452
 453           <http://www.linkupsys.com/>
 454
 455           If you have any questions or comments about the Linux kernel port
 456           to this board, send e-mail to <sjhill@cotw.com>.
 457
 458 config ARCH_DOVE
 459         bool "Marvell Dove"
 460         select PCI
 461         select GENERIC_GPIO
 462         select ARCH_REQUIRE_GPIOLIB
 463         select GENERIC_TIME
 464         select GENERIC_CLOCKEVENTS
 465         select PLAT_ORION
 466         help
 467           Support for the Marvell Dove SoC 88AP510
 468
 469 config ARCH_KIRKWOOD
 470         bool "Marvell Kirkwood"
 471         select CPU_FEROCEON
 472         select PCI
 473         select GENERIC_GPIO
 474         select ARCH_REQUIRE_GPIOLIB
 475         select GENERIC_TIME
 476         select GENERIC_CLOCKEVENTS
 477         select PLAT_ORION
 478         help
 479           Support for the following Marvell Kirkwood series SoCs:
 480           88F6180, 88F6192 and 88F6281.
 481
 482 config ARCH_LOKI
 483         bool "Marvell Loki (88RC8480)"
 484         select CPU_FEROCEON
 485         select GENERIC_TIME
 486         select GENERIC_CLOCKEVENTS
 487         select PLAT_ORION
 488         help
 489           Support for the Marvell Loki (88RC8480) SoC.
 490
 491 config ARCH_MV78XX0
 492         bool "Marvell MV78xx0"
 493         select CPU_FEROCEON
 494         select PCI
 495         select GENERIC_GPIO
 496         select ARCH_REQUIRE_GPIOLIB
 497         select GENERIC_TIME
 498         select GENERIC_CLOCKEVENTS
 499         select PLAT_ORION
 500         help
 501           Support for the following Marvell MV78xx0 series SoCs:
 502           MV781x0, MV782x0.
 503
 504 config ARCH_ORION5X
 505         bool "Marvell Orion"
 506         depends on MMU
 507         select CPU_FEROCEON
 508         select PCI
 509         select GENERIC_GPIO
 510         select ARCH_REQUIRE_GPIOLIB
 511         select GENERIC_TIME
 512         select GENERIC_CLOCKEVENTS
 513         select PLAT_ORION
 514         help
 515           Support for the following Marvell Orion 5x series SoCs:
 516           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 517           Orion-2 (5281), Orion-1-90 (6183).
 518
 519 config ARCH_MMP
 520         bool "Marvell PXA168/910/MMP2"
 521         depends on MMU
 522         select GENERIC_GPIO
 523         select ARCH_REQUIRE_GPIOLIB
 524         select HAVE_CLK
 525         select COMMON_CLKDEV
 526         select GENERIC_TIME
 527         select GENERIC_CLOCKEVENTS
 528         select TICK_ONESHOT
 529         select PLAT_PXA
 530         help
 531           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 532
 533 config ARCH_KS8695
 534         bool "Micrel/Kendin KS8695"
 535         select CPU_ARM922T
 536         select GENERIC_GPIO
 537         select ARCH_REQUIRE_GPIOLIB
 538         help
 539           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 540           System-on-Chip devices.
 541
 542 config ARCH_NS9XXX
 543         bool "NetSilicon NS9xxx"
 544         select CPU_ARM926T
 545         select GENERIC_GPIO
 546         select GENERIC_TIME
 547         select GENERIC_CLOCKEVENTS
 548         select HAVE_CLK
 549         help
 550           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 551           System.
 552
 553           <http://www.digi.com/products/microprocessors/index.jsp>
 554
 555 config ARCH_W90X900
 556         bool "Nuvoton W90X900 CPU"
 557         select CPU_ARM926T
 558         select ARCH_REQUIRE_GPIOLIB
 559         select GENERIC_GPIO
 560         select HAVE_CLK
 561         select COMMON_CLKDEV
 562         select GENERIC_TIME
 563         select GENERIC_CLOCKEVENTS
 564         help
 565           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 566           At present, the w90x900 has been renamed nuc900, regarding
 567           the ARM series product line, you can login the following
 568           link address to know more.
 569
 570           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 571                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 572
 573 config ARCH_NUC93X
 574         bool "Nuvoton NUC93X CPU"
 575         select CPU_ARM926T
 576         select HAVE_CLK
 577         select COMMON_CLKDEV
 578         help
 579           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 580           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 581
 582 config ARCH_PNX4008
 583         bool "Philips Nexperia PNX4008 Mobile"
 584         select CPU_ARM926T
 585         select HAVE_CLK
 586         select COMMON_CLKDEV
 587         help
 588           This enables support for Philips PNX4008 mobile platform.
 589
 590 config ARCH_PXA
 591         bool "PXA2xx/PXA3xx-based"
 592         depends on MMU
 593         select ARCH_MTD_XIP
 594         select ARCH_HAS_CPUFREQ
 595         select GENERIC_GPIO
 596         select HAVE_CLK
 597         select COMMON_CLKDEV
 598         select ARCH_REQUIRE_GPIOLIB
 599         select GENERIC_TIME
 600         select GENERIC_CLOCKEVENTS
 601         select TICK_ONESHOT
 602         select PLAT_PXA
 603         help
 604           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 605
 606 config ARCH_MSM
 607         bool "Qualcomm MSM"
 608         select CPU_V6
 609         select GENERIC_TIME
 610         select GENERIC_CLOCKEVENTS
 611         help
 612           Support for Qualcomm MSM7K based systems.  This runs on the ARM11
 613           apps processor of the MSM7K and depends on a shared memory
 614           interface to the ARM9 modem processor which runs the baseband stack
 615           and controls some vital subsystems (clock and power control, etc).
 616
 617 config ARCH_SHMOBILE
 618         bool "Renesas SH-Mobile"
 619         help
 620           Support for Renesas's SH-Mobile ARM platforms
 621
 622 config ARCH_RPC
 623         bool "RiscPC"
 624         select ARCH_ACORN
 625         select FIQ
 626         select TIMER_ACORN
 627         select ARCH_MAY_HAVE_PC_FDC
 628         select HAVE_PATA_PLATFORM
 629         select ISA_DMA_API
 630         select NO_IOPORT
 631         select ARCH_SPARSEMEM_ENABLE
 632         help
 633           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 634           CD-ROM interface, serial and parallel port, and the floppy drive.
 635
 636 config ARCH_SA1100
 637         bool "SA1100-based"
 638         select CPU_SA1100
 639         select ISA
 640         select ARCH_SPARSEMEM_ENABLE
 641         select ARCH_MTD_XIP
 642         select ARCH_HAS_CPUFREQ
 643         select CPU_FREQ
 644         select GENERIC_GPIO
 645         select GENERIC_TIME
 646         select GENERIC_CLOCKEVENTS
 647         select HAVE_CLK
 648         select TICK_ONESHOT
 649         select ARCH_REQUIRE_GPIOLIB
 650         help
 651           Support for StrongARM 11x0 based boards.
 652
 653 config ARCH_S3C2410
 654         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 655         select GENERIC_GPIO
 656         select ARCH_HAS_CPUFREQ
 657         select HAVE_CLK
 658         help
 659           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 660           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 661           the Samsung SMDK2410 development board (and derivatives).
 662
 663 config ARCH_S3C64XX
 664         bool "Samsung S3C64XX"
 665         select PLAT_SAMSUNG
 666         select CPU_V6
 667         select GENERIC_GPIO
 668         select ARM_VIC
 669         select HAVE_CLK
 670         select NO_IOPORT
 671         select ARCH_HAS_CPUFREQ
 672         select ARCH_REQUIRE_GPIOLIB
 673         select SAMSUNG_CLKSRC
 674         select SAMSUNG_IRQ_VIC_TIMER
 675         select SAMSUNG_IRQ_UART
 676         select S3C_GPIO_TRACK
 677         select S3C_GPIO_PULL_UPDOWN
 678         select S3C_GPIO_CFG_S3C24XX
 679         select S3C_GPIO_CFG_S3C64XX
 680         select S3C_DEV_NAND
 681         select USB_ARCH_HAS_OHCI
 682         select SAMSUNG_GPIOLIB_4BIT
 683         help
 684           Samsung S3C64XX series based systems
 685
 686 config ARCH_S5P6440
 687         bool "Samsung S5P6440"
 688         select CPU_V6
 689         select GENERIC_GPIO
 690         select HAVE_CLK
 691         help
 692           Samsung S5P6440 CPU based systems
 693
 694 config ARCH_S5P6442
 695         bool "Samsung S5P6442"
 696         select CPU_V6
 697         select GENERIC_GPIO
 698         select HAVE_CLK
 699         help
 700           Samsung S5P6442 CPU based systems
 701
 702 config ARCH_S5PC1XX
 703         bool "Samsung S5PC1XX"
 704         select GENERIC_GPIO
 705         select HAVE_CLK
 706         select CPU_V7
 707         select ARM_L1_CACHE_SHIFT_6
 708         help
 709           Samsung S5PC1XX series based systems
 710
 711 config ARCH_S5PV210
 712         bool "Samsung S5PV210/S5PC110"
 713         select CPU_V7
 714         select GENERIC_GPIO
 715         select HAVE_CLK
 716         select ARM_L1_CACHE_SHIFT_6
 717         help
 718           Samsung S5PV210/S5PC110 series based systems
 719
 720 config ARCH_SHARK
 721         bool "Shark"
 722         select CPU_SA110
 723         select ISA
 724         select ISA_DMA
 725         select ZONE_DMA
 726         select PCI
 727         help
 728           Support for the StrongARM based Digital DNARD machine, also known
 729           as "Shark" (<http://www.shark-linux.de/shark.html>).
 730
 731 config ARCH_LH7A40X
 732         bool "Sharp LH7A40X"
 733         select CPU_ARM922T
 734         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 735         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 736         help
 737           Say Y here for systems based on one of the Sharp LH7A40X
 738           System on a Chip processors.  These CPUs include an ARM922T
 739           core with a wide array of integrated devices for
 740           hand-held and low-power applications.
 741
 742 config ARCH_U300
 743         bool "ST-Ericsson U300 Series"
 744         depends on MMU
 745         select CPU_ARM926T
 746         select HAVE_TCM
 747         select ARM_AMBA
 748         select ARM_VIC
 749         select GENERIC_TIME
 750         select GENERIC_CLOCKEVENTS
 751         select HAVE_CLK
 752         select COMMON_CLKDEV
 753         select GENERIC_GPIO
 754         help
 755           Support for ST-Ericsson U300 series mobile platforms.
 756
 757 config ARCH_U8500
 758         bool "ST-Ericsson U8500 Series"
 759         select CPU_V7
 760         select ARM_AMBA
 761         select GENERIC_TIME
 762         select GENERIC_CLOCKEVENTS
 763         select COMMON_CLKDEV
 764         help
 765           Support for ST-Ericsson's Ux500 architecture
 766
 767 config ARCH_NOMADIK
 768         bool "STMicroelectronics Nomadik"
 769         select ARM_AMBA
 770         select ARM_VIC
 771         select CPU_ARM926T
 772         select HAVE_CLK
 773         select COMMON_CLKDEV
 774         select GENERIC_TIME
 775         select GENERIC_CLOCKEVENTS
 776         select GENERIC_GPIO
 777         select ARCH_REQUIRE_GPIOLIB
 778         help
 779           Support for the Nomadik platform by ST-Ericsson
 780
 781 config ARCH_DAVINCI
 782         bool "TI DaVinci"
 783         select CPU_ARM926T
 784         select GENERIC_TIME
 785         select GENERIC_CLOCKEVENTS
 786         select GENERIC_GPIO
 787         select ARCH_REQUIRE_GPIOLIB
 788         select HAVE_CLK
 789         select ZONE_DMA
 790         select HAVE_IDE
 791         select COMMON_CLKDEV
 792         select GENERIC_ALLOCATOR
 793         select ARCH_HAS_HOLES_MEMORYMODEL
 794         help
 795           Support for TI's DaVinci platform.
 796
 797 config ARCH_OMAP
 798         bool "TI OMAP"
 799         select GENERIC_GPIO
 800         select HAVE_CLK
 801         select ARCH_REQUIRE_GPIOLIB
 802         select ARCH_HAS_CPUFREQ
 803         select GENERIC_TIME
 804         select GENERIC_CLOCKEVENTS
 805         select ARCH_HAS_HOLES_MEMORYMODEL
 806         help
 807           Support for TI's OMAP platform (OMAP1 and OMAP2).
 808
 809 endchoice
 810
 811 #
 812 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 813 # Kconfigs may be included either alphabetically (according to the
 814 # plat- suffix) or along side the corresponding mach-* source.
 815 #
 816 source "arch/arm/mach-aaec2000/Kconfig"
 817
 818 source "arch/arm/mach-at91/Kconfig"
 819
 820 source "arch/arm/mach-bcmring/Kconfig"
 821
 822 source "arch/arm/mach-clps711x/Kconfig"
 823
 824 source "arch/arm/mach-davinci/Kconfig"
 825
 826 source "arch/arm/mach-dove/Kconfig"
 827
 828 source "arch/arm/mach-ep93xx/Kconfig"
 829
 830 source "arch/arm/mach-footbridge/Kconfig"
 831
 832 source "arch/arm/mach-gemini/Kconfig"
 833
 834 source "arch/arm/mach-h720x/Kconfig"
 835
 836 source "arch/arm/mach-integrator/Kconfig"
 837
 838 source "arch/arm/mach-iop32x/Kconfig"
 839
 840 source "arch/arm/mach-iop33x/Kconfig"
 841
 842 source "arch/arm/mach-iop13xx/Kconfig"
 843
 844 source "arch/arm/mach-ixp4xx/Kconfig"
 845
 846 source "arch/arm/mach-ixp2000/Kconfig"
 847
 848 source "arch/arm/mach-ixp23xx/Kconfig"
 849
 850 source "arch/arm/mach-kirkwood/Kconfig"
 851
 852 source "arch/arm/mach-ks8695/Kconfig"
 853
 854 source "arch/arm/mach-lh7a40x/Kconfig"
 855
 856 source "arch/arm/mach-loki/Kconfig"
 857
 858 source "arch/arm/mach-msm/Kconfig"
 859
 860 source "arch/arm/mach-mv78xx0/Kconfig"
 861
 862 source "arch/arm/plat-mxc/Kconfig"
 863
 864 source "arch/arm/mach-netx/Kconfig"
 865
 866 source "arch/arm/mach-nomadik/Kconfig"
 867 source "arch/arm/plat-nomadik/Kconfig"
 868
 869 source "arch/arm/mach-ns9xxx/Kconfig"
 870
 871 source "arch/arm/mach-nuc93x/Kconfig"
 872
 873 source "arch/arm/plat-omap/Kconfig"
 874
 875 source "arch/arm/mach-omap1/Kconfig"
 876
 877 source "arch/arm/mach-omap2/Kconfig"
 878
 879 source "arch/arm/mach-orion5x/Kconfig"
 880
 881 source "arch/arm/mach-pxa/Kconfig"
 882 source "arch/arm/plat-pxa/Kconfig"
 883
 884 source "arch/arm/mach-mmp/Kconfig"
 885
 886 source "arch/arm/mach-realview/Kconfig"
 887
 888 source "arch/arm/mach-sa1100/Kconfig"
 889
 890 source "arch/arm/plat-samsung/Kconfig"
 891 source "arch/arm/plat-s3c24xx/Kconfig"
 892 source "arch/arm/plat-s5p/Kconfig"
 893 source "arch/arm/plat-s5pc1xx/Kconfig"
 894
 895 if ARCH_S3C2410
 896 source "arch/arm/mach-s3c2400/Kconfig"
 897 source "arch/arm/mach-s3c2410/Kconfig"
 898 source "arch/arm/mach-s3c2412/Kconfig"
 899 source "arch/arm/mach-s3c2440/Kconfig"
 900 source "arch/arm/mach-s3c2443/Kconfig"
 901 endif
 902
 903 if ARCH_S3C64XX
 904 source "arch/arm/mach-s3c64xx/Kconfig"
 905 endif
 906
 907 source "arch/arm/mach-s5p6440/Kconfig"
 908
 909 source "arch/arm/mach-s5p6442/Kconfig"
 910
 911 if ARCH_S5PC1XX
 912 source "arch/arm/mach-s5pc100/Kconfig"
 913 endif
 914
 915 source "arch/arm/mach-s5pv210/Kconfig"
 916
 917 source "arch/arm/mach-shmobile/Kconfig"
 918
 919 source "arch/arm/plat-stmp3xxx/Kconfig"
 920
 921 source "arch/arm/mach-u300/Kconfig"
 922
 923 source "arch/arm/mach-ux500/Kconfig"
 924
 925 source "arch/arm/mach-versatile/Kconfig"
 926
 927 source "arch/arm/mach-w90x900/Kconfig"
 928
 929 # Definitions to make life easier
 930 config ARCH_ACORN
 931         bool
 932
 933 config PLAT_IOP
 934         bool
 935         select GENERIC_CLOCKEVENTS
 936         select GENERIC_TIME
 937
 938 config PLAT_ORION
 939         bool
 940
 941 config PLAT_PXA
 942         bool
 943
 944 config PLAT_VERSATILE
 945         bool
 946
 947 source arch/arm/mm/Kconfig
 948
 949 config IWMMXT
 950         bool "Enable iWMMXt support"
 951         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 952         default y if PXA27x || PXA3xx || ARCH_MMP
 953         help
 954           Enable support for iWMMXt context switching at run time if
 955           running on a CPU that supports it.
 956
 957 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 958 config XSCALE_PMU
 959         bool
 960         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 961         default y
 962
 963 config CPU_HAS_PMU
 964         depends on CPU_V6 || CPU_V7 || XSCALE_PMU
 965         default y
 966         bool
 967
 968 if !MMU
 969 source "arch/arm/Kconfig-nommu"
 970 endif
 971
 972 config ARM_ERRATA_411920
 973         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 974         depends on CPU_V6 && !SMP
 975         help
 976           Invalidation of the Instruction Cache operation can
 977           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 978           It does not affect the MPCore. This option enables the ARM Ltd.
 979           recommended workaround.
 980
 981 config ARM_ERRATA_430973
 982         bool "ARM errata: Stale prediction on replaced interworking branch"
 983         depends on CPU_V7
 984         help
 985           This option enables the workaround for the 430973 Cortex-A8
 986           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 987           interworking branch is replaced with another code sequence at the
 988           same virtual address, whether due to self-modifying code or virtual
 989           to physical address re-mapping, Cortex-A8 does not recover from the
 990           stale interworking branch prediction. This results in Cortex-A8
 991           executing the new code sequence in the incorrect ARM or Thumb state.
 992           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 993           and also flushes the branch target cache at every context switch.
 994           Note that setting specific bits in the ACTLR register may not be
 995           available in non-secure mode.
 996
 997 config ARM_ERRATA_458693
 998         bool "ARM errata: Processor deadlock when a false hazard is created"
 999         depends on CPU_V7
1000         help
1001           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1002           erratum. For very specific sequences of memory operations, it is
1003           possible for a hazard condition intended for a cache line to instead
1004           be incorrectly associated with a different cache line. This false
1005           hazard might then cause a processor deadlock. The workaround enables
1006           the L1 caching of the NEON accesses and disables the PLD instruction
1007           in the ACTLR register. Note that setting specific bits in the ACTLR
1008           register may not be available in non-secure mode.
1009
1010 config ARM_ERRATA_460075
1011         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1012         depends on CPU_V7
1013         help
1014           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1015           erratum. Any asynchronous access to the L2 cache may encounter a
1016           situation in which recent store transactions to the L2 cache are lost
1017           and overwritten with stale memory contents from external memory. The
1018           workaround disables the write-allocate mode for the L2 cache via the
1019           ACTLR register. Note that setting specific bits in the ACTLR register
1020           may not be available in non-secure mode.
1021
1022 config PL310_ERRATA_588369
1023         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1024         depends on CACHE_L2X0 && ARCH_OMAP4
1025         help
1026            The PL310 L2 cache controller implements three types of Clean &
1027            Invalidate maintenance operations: by Physical Address
1028            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1029            They are architecturally defined to behave as the execution of a
1030            clean operation followed immediately by an invalidate operation,
1031            both performing to the same memory location. This functionality
1032            is not correctly implemented in PL310 as clean lines are not
1033            invalidated as a result of these operations. Note that this errata
1034            uses Texas Instrument's secure monitor api.
1035 endmenu
1036
1037 source "arch/arm/common/Kconfig"
1038
1039 config FORCE_MAX_ZONEORDER
1040         int
1041         depends on SA1111
1042         default "9"
1043
1044 menu "Bus support"
1045
1046 config ARM_AMBA
1047         bool
1048
1049 config ISA
1050         bool
1051         help
1052           Find out whether you have ISA slots on your motherboard.  ISA is the
1053           name of a bus system, i.e. the way the CPU talks to the other stuff
1054           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1055           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1056           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1057
1058 # Select ISA DMA controller support
1059 config ISA_DMA
1060         bool
1061         select ISA_DMA_API
1062
1063 # Select ISA DMA interface
1064 config ISA_DMA_API
1065         bool
1066
1067 config PCI
1068         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1069         help
1070           Find out whether you have a PCI motherboard. PCI is the name of a
1071           bus system, i.e. the way the CPU talks to the other stuff inside
1072           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1073           VESA. If you have PCI, say Y, otherwise N.
1074
1075 config PCI_SYSCALL
1076         def_bool PCI
1077
1078 # Select the host bridge type
1079 config PCI_HOST_VIA82C505
1080         bool
1081         depends on PCI && ARCH_SHARK
1082         default y
1083
1084 config PCI_HOST_ITE8152
1085         bool
1086         depends on PCI && MACH_ARMCORE
1087         default y
1088         select DMABOUNCE
1089
1090 source "drivers/pci/Kconfig"
1091
1092 source "drivers/pcmcia/Kconfig"
1093
1094 endmenu
1095
1096 menu "Kernel Features"
1097
1098 source "kernel/time/Kconfig"
1099
1100 config SMP
1101         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1102         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1103                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1104         depends on GENERIC_CLOCKEVENTS
1105         select USE_GENERIC_SMP_HELPERS
1106         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1107         help
1108           This enables support for systems with more than one CPU. If you have
1109           a system with only one CPU, like most personal computers, say N. If
1110           you have a system with more than one CPU, say Y.
1111
1112           If you say N here, the kernel will run on single and multiprocessor
1113           machines, but will use only one CPU of a multiprocessor machine. If
1114           you say Y here, the kernel will run on many, but not all, single
1115           processor machines. On a single processor machine, the kernel will
1116           run faster if you say N here.
1117
1118           See also <file:Documentation/i386/IO-APIC.txt>,
1119           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1120           <http://www.linuxdoc.org/docs.html#howto>.
1121
1122           If you don't know what to do here, say N.
1123
1124 config HAVE_ARM_SCU
1125         bool
1126         depends on SMP
1127         help
1128           This option enables support for the ARM system coherency unit
1129
1130 config HAVE_ARM_TWD
1131         bool
1132         depends on SMP
1133         help
1134           This options enables support for the ARM timer and watchdog unit
1135
1136 choice
1137         prompt "Memory split"
1138         default VMSPLIT_3G
1139         help
1140           Select the desired split between kernel and user memory.
1141
1142           If you are not absolutely sure what you are doing, leave this
1143           option alone!
1144
1145         config VMSPLIT_3G
1146                 bool "3G/1G user/kernel split"
1147         config VMSPLIT_2G
1148                 bool "2G/2G user/kernel split"
1149         config VMSPLIT_1G
1150                 bool "1G/3G user/kernel split"
1151 endchoice
1152
1153 config PAGE_OFFSET
1154         hex
1155         default 0x40000000 if VMSPLIT_1G
1156         default 0x80000000 if VMSPLIT_2G
1157         default 0xC0000000
1158
1159 config NR_CPUS
1160         int "Maximum number of CPUs (2-32)"
1161         range 2 32
1162         depends on SMP
1163         default "4"
1164
1165 config HOTPLUG_CPU
1166         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1167         depends on SMP && HOTPLUG && EXPERIMENTAL
1168         help
1169           Say Y here to experiment with turning CPUs off and on.  CPUs
1170           can be controlled through /sys/devices/system/cpu.
1171
1172 config LOCAL_TIMERS
1173         bool "Use local timer interrupts"
1174         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1175                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1176         default y
1177         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1178         help
1179           Enable support for local timers on SMP platforms, rather then the
1180           legacy IPI broadcast method.  Local timers allows the system
1181           accounting to be spread across the timer interval, preventing a
1182           "thundering herd" at every timer tick.
1183
1184 source kernel/Kconfig.preempt
1185
1186 config HZ
1187         int
1188         default 128 if ARCH_L7200
1189         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
1190         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1191         default AT91_TIMER_HZ if ARCH_AT91
1192         default 100
1193
1194 config THUMB2_KERNEL
1195         bool "Compile the kernel in Thumb-2 mode"
1196         depends on CPU_V7 && EXPERIMENTAL
1197         select AEABI
1198         select ARM_ASM_UNIFIED
1199         help
1200           By enabling this option, the kernel will be compiled in
1201           Thumb-2 mode. A compiler/assembler that understand the unified
1202           ARM-Thumb syntax is needed.
1203
1204           If unsure, say N.
1205
1206 config ARM_ASM_UNIFIED
1207         bool
1208
1209 config AEABI
1210         bool "Use the ARM EABI to compile the kernel"
1211         help
1212           This option allows for the kernel to be compiled using the latest
1213           ARM ABI (aka EABI).  This is only useful if you are using a user
1214           space environment that is also compiled with EABI.
1215
1216           Since there are major incompatibilities between the legacy ABI and
1217           EABI, especially with regard to structure member alignment, this
1218           option also changes the kernel syscall calling convention to
1219           disambiguate both ABIs and allow for backward compatibility support
1220           (selected with CONFIG_OABI_COMPAT).
1221
1222           To use this you need GCC version 4.0.0 or later.
1223
1224 config OABI_COMPAT
1225         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1226         depends on AEABI && EXPERIMENTAL
1227         default y
1228         help
1229           This option preserves the old syscall interface along with the
1230           new (ARM EABI) one. It also provides a compatibility layer to
1231           intercept syscalls that have structure arguments which layout
1232           in memory differs between the legacy ABI and the new ARM EABI
1233           (only for non "thumb" binaries). This option adds a tiny
1234           overhead to all syscalls and produces a slightly larger kernel.
1235           If you know you'll be using only pure EABI user space then you
1236           can say N here. If this option is not selected and you attempt
1237           to execute a legacy ABI binary then the result will be
1238           UNPREDICTABLE (in fact it can be predicted that it won't work
1239           at all). If in doubt say Y.
1240
1241 config ARCH_HAS_HOLES_MEMORYMODEL
1242         bool
1243
1244 # Discontigmem is deprecated
1245 config ARCH_DISCONTIGMEM_ENABLE
1246         bool
1247
1248 config ARCH_SPARSEMEM_ENABLE
1249         bool
1250
1251 config ARCH_SPARSEMEM_DEFAULT
1252         def_bool ARCH_SPARSEMEM_ENABLE
1253
1254 config ARCH_SELECT_MEMORY_MODEL
1255         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1256
1257 config NODES_SHIFT
1258         int
1259         default "4" if ARCH_LH7A40X
1260         default "2"
1261         depends on NEED_MULTIPLE_NODES
1262
1263 config HIGHMEM
1264         bool "High Memory Support (EXPERIMENTAL)"
1265         depends on MMU && EXPERIMENTAL
1266         help
1267           The address space of ARM processors is only 4 Gigabytes large
1268           and it has to accommodate user address space, kernel address
1269           space as well as some memory mapped IO. That means that, if you
1270           have a large amount of physical memory and/or IO, not all of the
1271           memory can be "permanently mapped" by the kernel. The physical
1272           memory that is not permanently mapped is called "high memory".
1273
1274           Depending on the selected kernel/user memory split, minimum
1275           vmalloc space and actual amount of RAM, you may not need this
1276           option which should result in a slightly faster kernel.
1277
1278           If unsure, say n.
1279
1280 config HIGHPTE
1281         bool "Allocate 2nd-level pagetables from highmem"
1282         depends on HIGHMEM
1283         depends on !OUTER_CACHE
1284
1285 config HW_PERF_EVENTS
1286         bool "Enable hardware performance counter support for perf events"
1287         depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
1288         default y
1289         help
1290           Enable hardware performance counter support for perf events. If
1291           disabled, perf events will use software events only.
1292
1293 source "mm/Kconfig"
1294
1295 config LEDS
1296         bool "Timer and CPU usage LEDs"
1297         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1298                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1299                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1300                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1301                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1302                    ARCH_AT91 || ARCH_DAVINCI || \
1303                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1304         help
1305           If you say Y here, the LEDs on your machine will be used
1306           to provide useful information about your current system status.
1307
1308           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1309           be able to select which LEDs are active using the options below. If
1310           you are compiling a kernel for the EBSA-110 or the LART however, the
1311           red LED will simply flash regularly to indicate that the system is
1312           still functional. It is safe to say Y here if you have a CATS
1313           system, but the driver will do nothing.
1314
1315 config LEDS_TIMER
1316         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1317                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1318                             || MACH_OMAP_PERSEUS2
1319         depends on LEDS
1320         depends on !GENERIC_CLOCKEVENTS
1321         default y if ARCH_EBSA110
1322         help
1323           If you say Y here, one of the system LEDs (the green one on the
1324           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1325           will flash regularly to indicate that the system is still
1326           operational. This is mainly useful to kernel hackers who are
1327           debugging unstable kernels.
1328
1329           The LART uses the same LED for both Timer LED and CPU usage LED
1330           functions. You may choose to use both, but the Timer LED function
1331           will overrule the CPU usage LED.
1332
1333 config LEDS_CPU
1334         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1335                         !ARCH_OMAP) \
1336                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1337                         || MACH_OMAP_PERSEUS2
1338         depends on LEDS
1339         help
1340           If you say Y here, the red LED will be used to give a good real
1341           time indication of CPU usage, by lighting whenever the idle task
1342           is not currently executing.
1343
1344           The LART uses the same LED for both Timer LED and CPU usage LED
1345           functions. You may choose to use both, but the Timer LED function
1346           will overrule the CPU usage LED.
1347
1348 config ALIGNMENT_TRAP
1349         bool
1350         depends on CPU_CP15_MMU
1351         default y if !ARCH_EBSA110
1352         select HAVE_PROC_CPU if PROC_FS
1353         help
1354           ARM processors cannot fetch/store information which is not
1355           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1356           address divisible by 4. On 32-bit ARM processors, these non-aligned
1357           fetch/store instructions will be emulated in software if you say
1358           here, which has a severe performance impact. This is necessary for
1359           correct operation of some network protocols. With an IP-only
1360           configuration it is safe to say N, otherwise say Y.
1361
1362 config UACCESS_WITH_MEMCPY
1363         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1364         depends on MMU && EXPERIMENTAL
1365         default y if CPU_FEROCEON
1366         help
1367           Implement faster copy_to_user and clear_user methods for CPU
1368           cores where a 8-word STM instruction give significantly higher
1369           memory write throughput than a sequence of individual 32bit stores.
1370
1371           A possible side effect is a slight increase in scheduling latency
1372           between threads sharing the same address space if they invoke
1373           such copy operations with large buffers.
1374
1375           However, if the CPU data cache is using a write-allocate mode,
1376           this option is unlikely to provide any performance gain.
1377
1378 endmenu
1379
1380 menu "Boot options"
1381
1382 # Compressed boot loader in ROM.  Yes, we really want to ask about
1383 # TEXT and BSS so we preserve their values in the config files.
1384 config ZBOOT_ROM_TEXT
1385         hex "Compressed ROM boot loader base address"
1386         default "0"
1387         help
1388           The physical address at which the ROM-able zImage is to be
1389           placed in the target.  Platforms which normally make use of
1390           ROM-able zImage formats normally set this to a suitable
1391           value in their defconfig file.
1392
1393           If ZBOOT_ROM is not enabled, this has no effect.
1394
1395 config ZBOOT_ROM_BSS
1396         hex "Compressed ROM boot loader BSS address"
1397         default "0"
1398         help
1399           The base address of an area of read/write memory in the target
1400           for the ROM-able zImage which must be available while the
1401           decompressor is running. It must be large enough to hold the
1402           entire decompressed kernel plus an additional 128 KiB.
1403           Platforms which normally make use of ROM-able zImage formats
1404           normally set this to a suitable value in their defconfig file.
1405
1406           If ZBOOT_ROM is not enabled, this has no effect.
1407
1408 config ZBOOT_ROM
1409         bool "Compressed boot loader in ROM/flash"
1410         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1411         help
1412           Say Y here if you intend to execute your compressed kernel image
1413           (zImage) directly from ROM or flash.  If unsure, say N.
1414
1415 config CMDLINE
1416         string "Default kernel command string"
1417         default ""
1418         help
1419           On some architectures (EBSA110 and CATS), there is currently no way
1420           for the boot loader to pass arguments to the kernel. For these
1421           architectures, you should supply some command-line options at build
1422           time by entering them here. As a minimum, you should specify the
1423           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1424
1425 config XIP_KERNEL
1426         bool "Kernel Execute-In-Place from ROM"
1427         depends on !ZBOOT_ROM
1428         help
1429           Execute-In-Place allows the kernel to run from non-volatile storage
1430           directly addressable by the CPU, such as NOR flash. This saves RAM
1431           space since the text section of the kernel is not loaded from flash
1432           to RAM.  Read-write sections, such as the data section and stack,
1433           are still copied to RAM.  The XIP kernel is not compressed since
1434           it has to run directly from flash, so it will take more space to
1435           store it.  The flash address used to link the kernel object files,
1436           and for storing it, is configuration dependent. Therefore, if you
1437           say Y here, you must know the proper physical address where to
1438           store the kernel image depending on your own flash memory usage.
1439
1440           Also note that the make target becomes "make xipImage" rather than
1441           "make zImage" or "make Image".  The final kernel binary to put in
1442           ROM memory will be arch/arm/boot/xipImage.
1443
1444           If unsure, say N.
1445
1446 config XIP_PHYS_ADDR
1447         hex "XIP Kernel Physical Location"
1448         depends on XIP_KERNEL
1449         default "0x00080000"
1450         help
1451           This is the physical address in your flash memory the kernel will
1452           be linked for and stored to.  This address is dependent on your
1453           own flash usage.
1454
1455 config KEXEC
1456         bool "Kexec system call (EXPERIMENTAL)"
1457         depends on EXPERIMENTAL
1458         help
1459           kexec is a system call that implements the ability to shutdown your
1460           current kernel, and to start another kernel.  It is like a reboot
1461           but it is independent of the system firmware.   And like a reboot
1462           you can start any kernel with it, not just Linux.
1463
1464           It is an ongoing process to be certain the hardware in a machine
1465           is properly shutdown, so do not be surprised if this code does not
1466           initially work for you.  It may help to enable device hotplugging
1467           support.
1468
1469 config ATAGS_PROC
1470         bool "Export atags in procfs"
1471         depends on KEXEC
1472         default y
1473         help
1474           Should the atags used to boot the kernel be exported in an "atags"
1475           file in procfs. Useful with kexec.
1476
1477 endmenu
1478
1479 menu "CPU Power Management"
1480
1481 if ARCH_HAS_CPUFREQ
1482
1483 source "drivers/cpufreq/Kconfig"
1484
1485 config CPU_FREQ_SA1100
1486         bool
1487
1488 config CPU_FREQ_SA1110
1489         bool
1490
1491 config CPU_FREQ_INTEGRATOR
1492         tristate "CPUfreq driver for ARM Integrator CPUs"
1493         depends on ARCH_INTEGRATOR && CPU_FREQ
1494         default y
1495         help
1496           This enables the CPUfreq driver for ARM Integrator CPUs.
1497
1498           For details, take a look at <file:Documentation/cpu-freq>.
1499
1500           If in doubt, say Y.
1501
1502 config CPU_FREQ_PXA
1503         bool
1504         depends on CPU_FREQ && ARCH_PXA && PXA25x
1505         default y
1506         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1507
1508 config CPU_FREQ_S3C64XX
1509         bool "CPUfreq support for Samsung S3C64XX CPUs"
1510         depends on CPU_FREQ && CPU_S3C6410
1511
1512 config CPU_FREQ_S3C
1513         bool
1514         help
1515           Internal configuration node for common cpufreq on Samsung SoC
1516
1517 config CPU_FREQ_S3C24XX
1518         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1519         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1520         select CPU_FREQ_S3C
1521         help
1522           This enables the CPUfreq driver for the Samsung S3C24XX family
1523           of CPUs.
1524
1525           For details, take a look at <file:Documentation/cpu-freq>.
1526
1527           If in doubt, say N.
1528
1529 config CPU_FREQ_S3C24XX_PLL
1530         bool "Support CPUfreq changing of PLL frequency"
1531         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1532         help
1533           Compile in support for changing the PLL frequency from the
1534           S3C24XX series CPUfreq driver. The PLL takes time to settle
1535           after a frequency change, so by default it is not enabled.
1536
1537           This also means that the PLL tables for the selected CPU(s) will
1538           be built which may increase the size of the kernel image.
1539
1540 config CPU_FREQ_S3C24XX_DEBUG
1541         bool "Debug CPUfreq Samsung driver core"
1542         depends on CPU_FREQ_S3C24XX
1543         help
1544           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1545
1546 config CPU_FREQ_S3C24XX_IODEBUG
1547         bool "Debug CPUfreq Samsung driver IO timing"
1548         depends on CPU_FREQ_S3C24XX
1549         help
1550           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1551
1552 config CPU_FREQ_S3C24XX_DEBUGFS
1553         bool "Export debugfs for CPUFreq"
1554         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1555         help
1556           Export status information via debugfs.
1557
1558 endif
1559
1560 source "drivers/cpuidle/Kconfig"
1561
1562 endmenu
1563
1564 menu "Floating point emulation"
1565
1566 comment "At least one emulation must be selected"
1567
1568 config FPE_NWFPE
1569         bool "NWFPE math emulation"
1570         depends on !AEABI || OABI_COMPAT
1571         ---help---
1572           Say Y to include the NWFPE floating point emulator in the kernel.
1573           This is necessary to run most binaries. Linux does not currently
1574           support floating point hardware so you need to say Y here even if
1575           your machine has an FPA or floating point co-processor podule.
1576
1577           You may say N here if you are going to load the Acorn FPEmulator
1578           early in the bootup.
1579
1580 config FPE_NWFPE_XP
1581         bool "Support extended precision"
1582         depends on FPE_NWFPE
1583         help
1584           Say Y to include 80-bit support in the kernel floating-point
1585           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1586           Note that gcc does not generate 80-bit operations by default,
1587           so in most cases this option only enlarges the size of the
1588           floating point emulator without any good reason.
1589
1590           You almost surely want to say N here.
1591
1592 config FPE_FASTFPE
1593         bool "FastFPE math emulation (EXPERIMENTAL)"
1594         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1595         ---help---
1596           Say Y here to include the FAST floating point emulator in the kernel.
1597           This is an experimental much faster emulator which now also has full
1598           precision for the mantissa.  It does not support any exceptions.
1599           It is very simple, and approximately 3-6 times faster than NWFPE.
1600
1601           It should be sufficient for most programs.  It may be not suitable
1602           for scientific calculations, but you have to check this for yourself.
1603           If you do not feel you need a faster FP emulation you should better
1604           choose NWFPE.
1605
1606 config VFP
1607         bool "VFP-format floating point maths"
1608         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1609         help
1610           Say Y to include VFP support code in the kernel. This is needed
1611           if your hardware includes a VFP unit.
1612
1613           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1614           release notes and additional status information.
1615
1616           Say N if your target does not have VFP hardware.
1617
1618 config VFPv3
1619         bool
1620         depends on VFP
1621         default y if CPU_V7
1622
1623 config NEON
1624         bool "Advanced SIMD (NEON) Extension support"
1625         depends on VFPv3 && CPU_V7
1626         help
1627           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1628           Extension.
1629
1630 endmenu
1631
1632 menu "Userspace binary formats"
1633
1634 source "fs/Kconfig.binfmt"
1635
1636 config ARTHUR
1637         tristate "RISC OS personality"
1638         depends on !AEABI
1639         help
1640           Say Y here to include the kernel code necessary if you want to run
1641           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1642           experimental; if this sounds frightening, say N and sleep in peace.
1643           You can also say M here to compile this support as a module (which
1644           will be called arthur).
1645
1646 endmenu
1647
1648 menu "Power management options"
1649
1650 source "kernel/power/Kconfig"
1651
1652 config ARCH_SUSPEND_POSSIBLE
1653         def_bool y
1654
1655 endmenu
1656
1657 source "net/Kconfig"
1658
1659 source "drivers/Kconfig"
1660
1661 source "fs/Kconfig"
1662
1663 source "arch/arm/Kconfig.debug"
1664
1665 source "security/Kconfig"
1666
1667 source "crypto/Kconfig"
1668
1669 source "lib/Kconfig"