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         select GPIO_PL061 if GPIOLIB
 257         help
 258           This enables support for ARM Ltd RealView boards.
 259
 260 config ARCH_VERSATILE
 261         bool "ARM Ltd. Versatile family"
 262         select ARM_AMBA
 263         select ARM_VIC
 264         select HAVE_CLK
 265         select COMMON_CLKDEV
 266         select ICST307
 267         select GENERIC_TIME
 268         select GENERIC_CLOCKEVENTS
 269         select ARCH_WANT_OPTIONAL_GPIOLIB
 270         help
 271           This enables support for ARM Ltd Versatile board.
 272
 273 config ARCH_AT91
 274         bool "Atmel AT91"
 275         select GENERIC_GPIO
 276         select ARCH_REQUIRE_GPIOLIB
 277         select HAVE_CLK
 278         help
 279           This enables support for systems based on the Atmel AT91RM9200,
 280           AT91SAM9 and AT91CAP9 processors.
 281
 282 config ARCH_BCMRING
 283         bool "Broadcom BCMRING"
 284         depends on MMU
 285         select CPU_V6
 286         select ARM_AMBA
 287         select COMMON_CLKDEV
 288         select GENERIC_TIME
 289         select GENERIC_CLOCKEVENTS
 290         select ARCH_WANT_OPTIONAL_GPIOLIB
 291         help
 292           Support for Broadcom's BCMRing platform.
 293
 294 config ARCH_CLPS711X
 295         bool "Cirrus Logic CLPS711x/EP721x-based"
 296         select CPU_ARM720T
 297         help
 298           Support for Cirrus Logic 711x/721x based boards.
 299
 300 config ARCH_CNS3XXX
 301         bool "Cavium Networks CNS3XXX family"
 302         select CPU_V6
 303         select GENERIC_TIME
 304         select GENERIC_CLOCKEVENTS
 305         select ARM_GIC
 306         help
 307           Support for Cavium Networks CNS3XXX platform.
 308
 309 config ARCH_GEMINI
 310         bool "Cortina Systems Gemini"
 311         select CPU_FA526
 312         select GENERIC_GPIO
 313         select ARCH_REQUIRE_GPIOLIB
 314         help
 315           Support for the Cortina Systems Gemini family SoCs
 316
 317 config ARCH_EBSA110
 318         bool "EBSA-110"
 319         select CPU_SA110
 320         select ISA
 321         select NO_IOPORT
 322         help
 323           This is an evaluation board for the StrongARM processor available
 324           from Digital. It has limited hardware on-board, including an
 325           Ethernet interface, two PCMCIA sockets, two serial ports and a
 326           parallel port.
 327
 328 config ARCH_EP93XX
 329         bool "EP93xx-based"
 330         select CPU_ARM920T
 331         select ARM_AMBA
 332         select ARM_VIC
 333         select GENERIC_GPIO
 334         select HAVE_CLK
 335         select COMMON_CLKDEV
 336         select ARCH_REQUIRE_GPIOLIB
 337         select ARCH_HAS_HOLES_MEMORYMODEL
 338         help
 339           This enables support for the Cirrus EP93xx series of CPUs.
 340
 341 config ARCH_FOOTBRIDGE
 342         bool "FootBridge"
 343         select CPU_SA110
 344         select FOOTBRIDGE
 345         help
 346           Support for systems based on the DC21285 companion chip
 347           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 348
 349 config ARCH_MXC
 350         bool "Freescale MXC/iMX-based"
 351         select GENERIC_TIME
 352         select GENERIC_CLOCKEVENTS
 353         select ARCH_REQUIRE_GPIOLIB
 354         select HAVE_CLK
 355         select COMMON_CLKDEV
 356         help
 357           Support for Freescale MXC/iMX-based family of processors
 358
 359 config ARCH_STMP3XXX
 360         bool "Freescale STMP3xxx"
 361         select CPU_ARM926T
 362         select HAVE_CLK
 363         select COMMON_CLKDEV
 364         select ARCH_REQUIRE_GPIOLIB
 365         select GENERIC_TIME
 366         select GENERIC_CLOCKEVENTS
 367         select GENERIC_GPIO
 368         select USB_ARCH_HAS_EHCI
 369         help
 370           Support for systems based on the Freescale 3xxx CPUs.
 371
 372 config ARCH_NETX
 373         bool "Hilscher NetX based"
 374         select CPU_ARM926T
 375         select ARM_VIC
 376         select GENERIC_CLOCKEVENTS
 377         select GENERIC_TIME
 378         help
 379           This enables support for systems based on the Hilscher NetX Soc
 380
 381 config ARCH_H720X
 382         bool "Hynix HMS720x-based"
 383         select CPU_ARM720T
 384         select ISA_DMA_API
 385         help
 386           This enables support for systems based on the Hynix HMS720x
 387
 388 config ARCH_IOP13XX
 389         bool "IOP13xx-based"
 390         depends on MMU
 391         select CPU_XSC3
 392         select PLAT_IOP
 393         select PCI
 394         select ARCH_SUPPORTS_MSI
 395         select VMSPLIT_1G
 396         help
 397           Support for Intel's IOP13XX (XScale) family of processors.
 398
 399 config ARCH_IOP32X
 400         bool "IOP32x-based"
 401         depends on MMU
 402         select CPU_XSCALE
 403         select PLAT_IOP
 404         select PCI
 405         select GENERIC_GPIO
 406         select ARCH_REQUIRE_GPIOLIB
 407         help
 408           Support for Intel's 80219 and IOP32X (XScale) family of
 409           processors.
 410
 411 config ARCH_IOP33X
 412         bool "IOP33x-based"
 413         depends on MMU
 414         select CPU_XSCALE
 415         select PLAT_IOP
 416         select PCI
 417         select GENERIC_GPIO
 418         select ARCH_REQUIRE_GPIOLIB
 419         help
 420           Support for Intel's IOP33X (XScale) family of processors.
 421
 422 config ARCH_IXP23XX
 423         bool "IXP23XX-based"
 424         depends on MMU
 425         select CPU_XSC3
 426         select PCI
 427         help
 428           Support for Intel's IXP23xx (XScale) family of processors.
 429
 430 config ARCH_IXP2000
 431         bool "IXP2400/2800-based"
 432         depends on MMU
 433         select CPU_XSCALE
 434         select PCI
 435         help
 436           Support for Intel's IXP2400/2800 (XScale) family of processors.
 437
 438 config ARCH_IXP4XX
 439         bool "IXP4xx-based"
 440         depends on MMU
 441         select CPU_XSCALE
 442         select GENERIC_GPIO
 443         select GENERIC_TIME
 444         select GENERIC_CLOCKEVENTS
 445         select DMABOUNCE if PCI
 446         help
 447           Support for Intel's IXP4XX (XScale) family of processors.
 448
 449 config ARCH_L7200
 450         bool "LinkUp-L7200"
 451         select CPU_ARM720T
 452         select FIQ
 453         help
 454           Say Y here if you intend to run this kernel on a LinkUp Systems
 455           L7200 Software Development Board which uses an ARM720T processor.
 456           Information on this board can be obtained at:
 457
 458           <http://www.linkupsys.com/>
 459
 460           If you have any questions or comments about the Linux kernel port
 461           to this board, send e-mail to <sjhill@cotw.com>.
 462
 463 config ARCH_DOVE
 464         bool "Marvell Dove"
 465         select PCI
 466         select GENERIC_GPIO
 467         select ARCH_REQUIRE_GPIOLIB
 468         select GENERIC_TIME
 469         select GENERIC_CLOCKEVENTS
 470         select PLAT_ORION
 471         help
 472           Support for the Marvell Dove SoC 88AP510
 473
 474 config ARCH_KIRKWOOD
 475         bool "Marvell Kirkwood"
 476         select CPU_FEROCEON
 477         select PCI
 478         select GENERIC_GPIO
 479         select ARCH_REQUIRE_GPIOLIB
 480         select GENERIC_TIME
 481         select GENERIC_CLOCKEVENTS
 482         select PLAT_ORION
 483         help
 484           Support for the following Marvell Kirkwood series SoCs:
 485           88F6180, 88F6192 and 88F6281.
 486
 487 config ARCH_LOKI
 488         bool "Marvell Loki (88RC8480)"
 489         select CPU_FEROCEON
 490         select GENERIC_TIME
 491         select GENERIC_CLOCKEVENTS
 492         select PLAT_ORION
 493         help
 494           Support for the Marvell Loki (88RC8480) SoC.
 495
 496 config ARCH_MV78XX0
 497         bool "Marvell MV78xx0"
 498         select CPU_FEROCEON
 499         select PCI
 500         select GENERIC_GPIO
 501         select ARCH_REQUIRE_GPIOLIB
 502         select GENERIC_TIME
 503         select GENERIC_CLOCKEVENTS
 504         select PLAT_ORION
 505         help
 506           Support for the following Marvell MV78xx0 series SoCs:
 507           MV781x0, MV782x0.
 508
 509 config ARCH_ORION5X
 510         bool "Marvell Orion"
 511         depends on MMU
 512         select CPU_FEROCEON
 513         select PCI
 514         select GENERIC_GPIO
 515         select ARCH_REQUIRE_GPIOLIB
 516         select GENERIC_TIME
 517         select GENERIC_CLOCKEVENTS
 518         select PLAT_ORION
 519         help
 520           Support for the following Marvell Orion 5x series SoCs:
 521           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 522           Orion-2 (5281), Orion-1-90 (6183).
 523
 524 config ARCH_MMP
 525         bool "Marvell PXA168/910/MMP2"
 526         depends on MMU
 527         select GENERIC_GPIO
 528         select ARCH_REQUIRE_GPIOLIB
 529         select HAVE_CLK
 530         select COMMON_CLKDEV
 531         select GENERIC_TIME
 532         select GENERIC_CLOCKEVENTS
 533         select TICK_ONESHOT
 534         select PLAT_PXA
 535         help
 536           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 537
 538 config ARCH_KS8695
 539         bool "Micrel/Kendin KS8695"
 540         select CPU_ARM922T
 541         select GENERIC_GPIO
 542         select ARCH_REQUIRE_GPIOLIB
 543         help
 544           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 545           System-on-Chip devices.
 546
 547 config ARCH_NS9XXX
 548         bool "NetSilicon NS9xxx"
 549         select CPU_ARM926T
 550         select GENERIC_GPIO
 551         select GENERIC_TIME
 552         select GENERIC_CLOCKEVENTS
 553         select HAVE_CLK
 554         help
 555           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 556           System.
 557
 558           <http://www.digi.com/products/microprocessors/index.jsp>
 559
 560 config ARCH_W90X900
 561         bool "Nuvoton W90X900 CPU"
 562         select CPU_ARM926T
 563         select ARCH_REQUIRE_GPIOLIB
 564         select GENERIC_GPIO
 565         select HAVE_CLK
 566         select COMMON_CLKDEV
 567         select GENERIC_TIME
 568         select GENERIC_CLOCKEVENTS
 569         help
 570           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 571           At present, the w90x900 has been renamed nuc900, regarding
 572           the ARM series product line, you can login the following
 573           link address to know more.
 574
 575           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 576                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 577
 578 config ARCH_NUC93X
 579         bool "Nuvoton NUC93X CPU"
 580         select CPU_ARM926T
 581         select HAVE_CLK
 582         select COMMON_CLKDEV
 583         help
 584           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 585           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 586
 587 config ARCH_PNX4008
 588         bool "Philips Nexperia PNX4008 Mobile"
 589         select CPU_ARM926T
 590         select HAVE_CLK
 591         select COMMON_CLKDEV
 592         help
 593           This enables support for Philips PNX4008 mobile platform.
 594
 595 config ARCH_PXA
 596         bool "PXA2xx/PXA3xx-based"
 597         depends on MMU
 598         select ARCH_MTD_XIP
 599         select ARCH_HAS_CPUFREQ
 600         select GENERIC_GPIO
 601         select HAVE_CLK
 602         select COMMON_CLKDEV
 603         select ARCH_REQUIRE_GPIOLIB
 604         select GENERIC_TIME
 605         select GENERIC_CLOCKEVENTS
 606         select TICK_ONESHOT
 607         select PLAT_PXA
 608         help
 609           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 610
 611 config ARCH_MSM
 612         bool "Qualcomm MSM"
 613         select HAVE_CLK
 614         select GENERIC_TIME
 615         select GENERIC_CLOCKEVENTS
 616         help
 617           Support for Qualcomm MSM/QSD based systems.  This runs on the
 618           apps processor of the MSM/QSD and depends on a shared memory
 619           interface to the modem processor which runs the baseband
 620           stack and controls some vital subsystems
 621           (clock and power control, etc).
 622
 623 config ARCH_SHMOBILE
 624         bool "Renesas SH-Mobile"
 625         help
 626           Support for Renesas's SH-Mobile ARM platforms
 627
 628 config ARCH_RPC
 629         bool "RiscPC"
 630         select ARCH_ACORN
 631         select FIQ
 632         select TIMER_ACORN
 633         select ARCH_MAY_HAVE_PC_FDC
 634         select HAVE_PATA_PLATFORM
 635         select ISA_DMA_API
 636         select NO_IOPORT
 637         select ARCH_SPARSEMEM_ENABLE
 638         help
 639           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 640           CD-ROM interface, serial and parallel port, and the floppy drive.
 641
 642 config ARCH_SA1100
 643         bool "SA1100-based"
 644         select CPU_SA1100
 645         select ISA
 646         select ARCH_SPARSEMEM_ENABLE
 647         select ARCH_MTD_XIP
 648         select ARCH_HAS_CPUFREQ
 649         select CPU_FREQ
 650         select GENERIC_GPIO
 651         select GENERIC_TIME
 652         select GENERIC_CLOCKEVENTS
 653         select HAVE_CLK
 654         select TICK_ONESHOT
 655         select ARCH_REQUIRE_GPIOLIB
 656         help
 657           Support for StrongARM 11x0 based boards.
 658
 659 config ARCH_S3C2410
 660         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 661         select GENERIC_GPIO
 662         select ARCH_HAS_CPUFREQ
 663         select HAVE_CLK
 664         help
 665           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 666           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 667           the Samsung SMDK2410 development board (and derivatives).
 668
 669 config ARCH_S3C64XX
 670         bool "Samsung S3C64XX"
 671         select PLAT_SAMSUNG
 672         select CPU_V6
 673         select GENERIC_GPIO
 674         select ARM_VIC
 675         select HAVE_CLK
 676         select NO_IOPORT
 677         select ARCH_HAS_CPUFREQ
 678         select ARCH_REQUIRE_GPIOLIB
 679         select SAMSUNG_CLKSRC
 680         select SAMSUNG_IRQ_VIC_TIMER
 681         select SAMSUNG_IRQ_UART
 682         select S3C_GPIO_TRACK
 683         select S3C_GPIO_PULL_UPDOWN
 684         select S3C_GPIO_CFG_S3C24XX
 685         select S3C_GPIO_CFG_S3C64XX
 686         select S3C_DEV_NAND
 687         select USB_ARCH_HAS_OHCI
 688         select SAMSUNG_GPIOLIB_4BIT
 689         help
 690           Samsung S3C64XX series based systems
 691
 692 config ARCH_S5P6440
 693         bool "Samsung S5P6440"
 694         select CPU_V6
 695         select GENERIC_GPIO
 696         select HAVE_CLK
 697         help
 698           Samsung S5P6440 CPU based systems
 699
 700 config ARCH_S5P6442
 701         bool "Samsung S5P6442"
 702         select CPU_V6
 703         select GENERIC_GPIO
 704         select HAVE_CLK
 705         help
 706           Samsung S5P6442 CPU based systems
 707
 708 config ARCH_S5PC1XX
 709         bool "Samsung S5PC1XX"
 710         select GENERIC_GPIO
 711         select HAVE_CLK
 712         select CPU_V7
 713         select ARM_L1_CACHE_SHIFT_6
 714         help
 715           Samsung S5PC1XX series based systems
 716
 717 config ARCH_S5PV210
 718         bool "Samsung S5PV210/S5PC110"
 719         select CPU_V7
 720         select GENERIC_GPIO
 721         select HAVE_CLK
 722         select ARM_L1_CACHE_SHIFT_6
 723         help
 724           Samsung S5PV210/S5PC110 series based systems
 725
 726 config ARCH_SHARK
 727         bool "Shark"
 728         select CPU_SA110
 729         select ISA
 730         select ISA_DMA
 731         select ZONE_DMA
 732         select PCI
 733         help
 734           Support for the StrongARM based Digital DNARD machine, also known
 735           as "Shark" (<http://www.shark-linux.de/shark.html>).
 736
 737 config ARCH_LH7A40X
 738         bool "Sharp LH7A40X"
 739         select CPU_ARM922T
 740         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 741         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 742         help
 743           Say Y here for systems based on one of the Sharp LH7A40X
 744           System on a Chip processors.  These CPUs include an ARM922T
 745           core with a wide array of integrated devices for
 746           hand-held and low-power applications.
 747
 748 config ARCH_U300
 749         bool "ST-Ericsson U300 Series"
 750         depends on MMU
 751         select CPU_ARM926T
 752         select HAVE_TCM
 753         select ARM_AMBA
 754         select ARM_VIC
 755         select GENERIC_TIME
 756         select GENERIC_CLOCKEVENTS
 757         select HAVE_CLK
 758         select COMMON_CLKDEV
 759         select GENERIC_GPIO
 760         help
 761           Support for ST-Ericsson U300 series mobile platforms.
 762
 763 config ARCH_U8500
 764         bool "ST-Ericsson U8500 Series"
 765         select CPU_V7
 766         select ARM_AMBA
 767         select GENERIC_TIME
 768         select GENERIC_CLOCKEVENTS
 769         select COMMON_CLKDEV
 770         help
 771           Support for ST-Ericsson's Ux500 architecture
 772
 773 config ARCH_NOMADIK
 774         bool "STMicroelectronics Nomadik"
 775         select ARM_AMBA
 776         select ARM_VIC
 777         select CPU_ARM926T
 778         select HAVE_CLK
 779         select COMMON_CLKDEV
 780         select GENERIC_TIME
 781         select GENERIC_CLOCKEVENTS
 782         select GENERIC_GPIO
 783         select ARCH_REQUIRE_GPIOLIB
 784         help
 785           Support for the Nomadik platform by ST-Ericsson
 786
 787 config ARCH_DAVINCI
 788         bool "TI DaVinci"
 789         select CPU_ARM926T
 790         select GENERIC_TIME
 791         select GENERIC_CLOCKEVENTS
 792         select GENERIC_GPIO
 793         select ARCH_REQUIRE_GPIOLIB
 794         select HAVE_CLK
 795         select ZONE_DMA
 796         select HAVE_IDE
 797         select COMMON_CLKDEV
 798         select GENERIC_ALLOCATOR
 799         select ARCH_HAS_HOLES_MEMORYMODEL
 800         help
 801           Support for TI's DaVinci platform.
 802
 803 config ARCH_OMAP
 804         bool "TI OMAP"
 805         select GENERIC_GPIO
 806         select HAVE_CLK
 807         select ARCH_REQUIRE_GPIOLIB
 808         select ARCH_HAS_CPUFREQ
 809         select GENERIC_TIME
 810         select GENERIC_CLOCKEVENTS
 811         select ARCH_HAS_HOLES_MEMORYMODEL
 812         help
 813           Support for TI's OMAP platform (OMAP1 and OMAP2).
 814
 815 endchoice
 816
 817 #
 818 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 819 # Kconfigs may be included either alphabetically (according to the
 820 # plat- suffix) or along side the corresponding mach-* source.
 821 #
 822 source "arch/arm/mach-aaec2000/Kconfig"
 823
 824 source "arch/arm/mach-at91/Kconfig"
 825
 826 source "arch/arm/mach-bcmring/Kconfig"
 827
 828 source "arch/arm/mach-clps711x/Kconfig"
 829
 830 source "arch/arm/mach-cns3xxx/Kconfig"
 831
 832 source "arch/arm/mach-davinci/Kconfig"
 833
 834 source "arch/arm/mach-dove/Kconfig"
 835
 836 source "arch/arm/mach-ep93xx/Kconfig"
 837
 838 source "arch/arm/mach-footbridge/Kconfig"
 839
 840 source "arch/arm/mach-gemini/Kconfig"
 841
 842 source "arch/arm/mach-h720x/Kconfig"
 843
 844 source "arch/arm/mach-integrator/Kconfig"
 845
 846 source "arch/arm/mach-iop32x/Kconfig"
 847
 848 source "arch/arm/mach-iop33x/Kconfig"
 849
 850 source "arch/arm/mach-iop13xx/Kconfig"
 851
 852 source "arch/arm/mach-ixp4xx/Kconfig"
 853
 854 source "arch/arm/mach-ixp2000/Kconfig"
 855
 856 source "arch/arm/mach-ixp23xx/Kconfig"
 857
 858 source "arch/arm/mach-kirkwood/Kconfig"
 859
 860 source "arch/arm/mach-ks8695/Kconfig"
 861
 862 source "arch/arm/mach-lh7a40x/Kconfig"
 863
 864 source "arch/arm/mach-loki/Kconfig"
 865
 866 source "arch/arm/mach-msm/Kconfig"
 867
 868 source "arch/arm/mach-mv78xx0/Kconfig"
 869
 870 source "arch/arm/plat-mxc/Kconfig"
 871
 872 source "arch/arm/mach-netx/Kconfig"
 873
 874 source "arch/arm/mach-nomadik/Kconfig"
 875 source "arch/arm/plat-nomadik/Kconfig"
 876
 877 source "arch/arm/mach-ns9xxx/Kconfig"
 878
 879 source "arch/arm/mach-nuc93x/Kconfig"
 880
 881 source "arch/arm/plat-omap/Kconfig"
 882
 883 source "arch/arm/mach-omap1/Kconfig"
 884
 885 source "arch/arm/mach-omap2/Kconfig"
 886
 887 source "arch/arm/mach-orion5x/Kconfig"
 888
 889 source "arch/arm/mach-pxa/Kconfig"
 890 source "arch/arm/plat-pxa/Kconfig"
 891
 892 source "arch/arm/mach-mmp/Kconfig"
 893
 894 source "arch/arm/mach-realview/Kconfig"
 895
 896 source "arch/arm/mach-sa1100/Kconfig"
 897
 898 source "arch/arm/plat-samsung/Kconfig"
 899 source "arch/arm/plat-s3c24xx/Kconfig"
 900 source "arch/arm/plat-s5p/Kconfig"
 901 source "arch/arm/plat-s5pc1xx/Kconfig"
 902
 903 if ARCH_S3C2410
 904 source "arch/arm/mach-s3c2400/Kconfig"
 905 source "arch/arm/mach-s3c2410/Kconfig"
 906 source "arch/arm/mach-s3c2412/Kconfig"
 907 source "arch/arm/mach-s3c2440/Kconfig"
 908 source "arch/arm/mach-s3c2443/Kconfig"
 909 endif
 910
 911 if ARCH_S3C64XX
 912 source "arch/arm/mach-s3c64xx/Kconfig"
 913 endif
 914
 915 source "arch/arm/mach-s5p6440/Kconfig"
 916
 917 source "arch/arm/mach-s5p6442/Kconfig"
 918
 919 if ARCH_S5PC1XX
 920 source "arch/arm/mach-s5pc100/Kconfig"
 921 endif
 922
 923 source "arch/arm/mach-s5pv210/Kconfig"
 924
 925 source "arch/arm/mach-shmobile/Kconfig"
 926
 927 source "arch/arm/plat-stmp3xxx/Kconfig"
 928
 929 source "arch/arm/mach-u300/Kconfig"
 930
 931 source "arch/arm/mach-ux500/Kconfig"
 932
 933 source "arch/arm/mach-versatile/Kconfig"
 934
 935 source "arch/arm/mach-w90x900/Kconfig"
 936
 937 # Definitions to make life easier
 938 config ARCH_ACORN
 939         bool
 940
 941 config PLAT_IOP
 942         bool
 943         select GENERIC_CLOCKEVENTS
 944         select GENERIC_TIME
 945
 946 config PLAT_ORION
 947         bool
 948
 949 config PLAT_PXA
 950         bool
 951
 952 source arch/arm/mm/Kconfig
 953
 954 config IWMMXT
 955         bool "Enable iWMMXt support"
 956         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 957         default y if PXA27x || PXA3xx || ARCH_MMP
 958         help
 959           Enable support for iWMMXt context switching at run time if
 960           running on a CPU that supports it.
 961
 962 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 963 config XSCALE_PMU
 964         bool
 965         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 966         default y
 967
 968 config CPU_HAS_PMU
 969         depends on CPU_V6 || CPU_V7 || XSCALE_PMU
 970         default y
 971         bool
 972
 973 if !MMU
 974 source "arch/arm/Kconfig-nommu"
 975 endif
 976
 977 config ARM_ERRATA_411920
 978         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 979         depends on CPU_V6 && !SMP
 980         help
 981           Invalidation of the Instruction Cache operation can
 982           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 983           It does not affect the MPCore. This option enables the ARM Ltd.
 984           recommended workaround.
 985
 986 config ARM_ERRATA_430973
 987         bool "ARM errata: Stale prediction on replaced interworking branch"
 988         depends on CPU_V7
 989         help
 990           This option enables the workaround for the 430973 Cortex-A8
 991           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 992           interworking branch is replaced with another code sequence at the
 993           same virtual address, whether due to self-modifying code or virtual
 994           to physical address re-mapping, Cortex-A8 does not recover from the
 995           stale interworking branch prediction. This results in Cortex-A8
 996           executing the new code sequence in the incorrect ARM or Thumb state.
 997           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 998           and also flushes the branch target cache at every context switch.
 999           Note that setting specific bits in the ACTLR register may not be
1000           available in non-secure mode.
1001
1002 config ARM_ERRATA_458693
1003         bool "ARM errata: Processor deadlock when a false hazard is created"
1004         depends on CPU_V7
1005         help
1006           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1007           erratum. For very specific sequences of memory operations, it is
1008           possible for a hazard condition intended for a cache line to instead
1009           be incorrectly associated with a different cache line. This false
1010           hazard might then cause a processor deadlock. The workaround enables
1011           the L1 caching of the NEON accesses and disables the PLD instruction
1012           in the ACTLR register. Note that setting specific bits in the ACTLR
1013           register may not be available in non-secure mode.
1014
1015 config ARM_ERRATA_460075
1016         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1017         depends on CPU_V7
1018         help
1019           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1020           erratum. Any asynchronous access to the L2 cache may encounter a
1021           situation in which recent store transactions to the L2 cache are lost
1022           and overwritten with stale memory contents from external memory. The
1023           workaround disables the write-allocate mode for the L2 cache via the
1024           ACTLR register. Note that setting specific bits in the ACTLR register
1025           may not be available in non-secure mode.
1026
1027 config PL310_ERRATA_588369
1028         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1029         depends on CACHE_L2X0 && ARCH_OMAP4
1030         help
1031            The PL310 L2 cache controller implements three types of Clean &
1032            Invalidate maintenance operations: by Physical Address
1033            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1034            They are architecturally defined to behave as the execution of a
1035            clean operation followed immediately by an invalidate operation,
1036            both performing to the same memory location. This functionality
1037            is not correctly implemented in PL310 as clean lines are not
1038            invalidated as a result of these operations. Note that this errata
1039            uses Texas Instrument's secure monitor api.
1040 endmenu
1041
1042 source "arch/arm/common/Kconfig"
1043
1044 config FORCE_MAX_ZONEORDER
1045         int
1046         depends on SA1111
1047         default "9"
1048
1049 menu "Bus support"
1050
1051 config ARM_AMBA
1052         bool
1053
1054 config ISA
1055         bool
1056         help
1057           Find out whether you have ISA slots on your motherboard.  ISA is the
1058           name of a bus system, i.e. the way the CPU talks to the other stuff
1059           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1060           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1061           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1062
1063 # Select ISA DMA controller support
1064 config ISA_DMA
1065         bool
1066         select ISA_DMA_API
1067
1068 # Select ISA DMA interface
1069 config ISA_DMA_API
1070         bool
1071
1072 config PCI
1073         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1074         help
1075           Find out whether you have a PCI motherboard. PCI is the name of a
1076           bus system, i.e. the way the CPU talks to the other stuff inside
1077           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1078           VESA. If you have PCI, say Y, otherwise N.
1079
1080 config PCI_SYSCALL
1081         def_bool PCI
1082
1083 # Select the host bridge type
1084 config PCI_HOST_VIA82C505
1085         bool
1086         depends on PCI && ARCH_SHARK
1087         default y
1088
1089 config PCI_HOST_ITE8152
1090         bool
1091         depends on PCI && MACH_ARMCORE
1092         default y
1093         select DMABOUNCE
1094
1095 source "drivers/pci/Kconfig"
1096
1097 source "drivers/pcmcia/Kconfig"
1098
1099 endmenu
1100
1101 menu "Kernel Features"
1102
1103 source "kernel/time/Kconfig"
1104
1105 config SMP
1106         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1107         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1108                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1109         depends on GENERIC_CLOCKEVENTS
1110         select USE_GENERIC_SMP_HELPERS
1111         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1112         help
1113           This enables support for systems with more than one CPU. If you have
1114           a system with only one CPU, like most personal computers, say N. If
1115           you have a system with more than one CPU, say Y.
1116
1117           If you say N here, the kernel will run on single and multiprocessor
1118           machines, but will use only one CPU of a multiprocessor machine. If
1119           you say Y here, the kernel will run on many, but not all, single
1120           processor machines. On a single processor machine, the kernel will
1121           run faster if you say N here.
1122
1123           See also <file:Documentation/i386/IO-APIC.txt>,
1124           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1125           <http://www.linuxdoc.org/docs.html#howto>.
1126
1127           If you don't know what to do here, say N.
1128
1129 config HAVE_ARM_SCU
1130         bool
1131         depends on SMP
1132         help
1133           This option enables support for the ARM system coherency unit
1134
1135 config HAVE_ARM_TWD
1136         bool
1137         depends on SMP
1138         help
1139           This options enables support for the ARM timer and watchdog unit
1140
1141 choice
1142         prompt "Memory split"
1143         default VMSPLIT_3G
1144         help
1145           Select the desired split between kernel and user memory.
1146
1147           If you are not absolutely sure what you are doing, leave this
1148           option alone!
1149
1150         config VMSPLIT_3G
1151                 bool "3G/1G user/kernel split"
1152         config VMSPLIT_2G
1153                 bool "2G/2G user/kernel split"
1154         config VMSPLIT_1G
1155                 bool "1G/3G user/kernel split"
1156 endchoice
1157
1158 config PAGE_OFFSET
1159         hex
1160         default 0x40000000 if VMSPLIT_1G
1161         default 0x80000000 if VMSPLIT_2G
1162         default 0xC0000000
1163
1164 config NR_CPUS
1165         int "Maximum number of CPUs (2-32)"
1166         range 2 32
1167         depends on SMP
1168         default "4"
1169
1170 config HOTPLUG_CPU
1171         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1172         depends on SMP && HOTPLUG && EXPERIMENTAL
1173         help
1174           Say Y here to experiment with turning CPUs off and on.  CPUs
1175           can be controlled through /sys/devices/system/cpu.
1176
1177 config LOCAL_TIMERS
1178         bool "Use local timer interrupts"
1179         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1180                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1181         default y
1182         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1183         help
1184           Enable support for local timers on SMP platforms, rather then the
1185           legacy IPI broadcast method.  Local timers allows the system
1186           accounting to be spread across the timer interval, preventing a
1187           "thundering herd" at every timer tick.
1188
1189 source kernel/Kconfig.preempt
1190
1191 config HZ
1192         int
1193         default 128 if ARCH_L7200
1194         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
1195         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1196         default AT91_TIMER_HZ if ARCH_AT91
1197         default 100
1198
1199 config THUMB2_KERNEL
1200         bool "Compile the kernel in Thumb-2 mode"
1201         depends on CPU_V7 && EXPERIMENTAL
1202         select AEABI
1203         select ARM_ASM_UNIFIED
1204         help
1205           By enabling this option, the kernel will be compiled in
1206           Thumb-2 mode. A compiler/assembler that understand the unified
1207           ARM-Thumb syntax is needed.
1208
1209           If unsure, say N.
1210
1211 config ARM_ASM_UNIFIED
1212         bool
1213
1214 config AEABI
1215         bool "Use the ARM EABI to compile the kernel"
1216         help
1217           This option allows for the kernel to be compiled using the latest
1218           ARM ABI (aka EABI).  This is only useful if you are using a user
1219           space environment that is also compiled with EABI.
1220
1221           Since there are major incompatibilities between the legacy ABI and
1222           EABI, especially with regard to structure member alignment, this
1223           option also changes the kernel syscall calling convention to
1224           disambiguate both ABIs and allow for backward compatibility support
1225           (selected with CONFIG_OABI_COMPAT).
1226
1227           To use this you need GCC version 4.0.0 or later.
1228
1229 config OABI_COMPAT
1230         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1231         depends on AEABI && EXPERIMENTAL
1232         default y
1233         help
1234           This option preserves the old syscall interface along with the
1235           new (ARM EABI) one. It also provides a compatibility layer to
1236           intercept syscalls that have structure arguments which layout
1237           in memory differs between the legacy ABI and the new ARM EABI
1238           (only for non "thumb" binaries). This option adds a tiny
1239           overhead to all syscalls and produces a slightly larger kernel.
1240           If you know you'll be using only pure EABI user space then you
1241           can say N here. If this option is not selected and you attempt
1242           to execute a legacy ABI binary then the result will be
1243           UNPREDICTABLE (in fact it can be predicted that it won't work
1244           at all). If in doubt say Y.
1245
1246 config ARCH_HAS_HOLES_MEMORYMODEL
1247         bool
1248
1249 # Discontigmem is deprecated
1250 config ARCH_DISCONTIGMEM_ENABLE
1251         bool
1252
1253 config ARCH_SPARSEMEM_ENABLE
1254         bool
1255
1256 config ARCH_SPARSEMEM_DEFAULT
1257         def_bool ARCH_SPARSEMEM_ENABLE
1258
1259 config ARCH_SELECT_MEMORY_MODEL
1260         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1261
1262 config NODES_SHIFT
1263         int
1264         default "4" if ARCH_LH7A40X
1265         default "2"
1266         depends on NEED_MULTIPLE_NODES
1267
1268 config HIGHMEM
1269         bool "High Memory Support (EXPERIMENTAL)"
1270         depends on MMU && EXPERIMENTAL
1271         help
1272           The address space of ARM processors is only 4 Gigabytes large
1273           and it has to accommodate user address space, kernel address
1274           space as well as some memory mapped IO. That means that, if you
1275           have a large amount of physical memory and/or IO, not all of the
1276           memory can be "permanently mapped" by the kernel. The physical
1277           memory that is not permanently mapped is called "high memory".
1278
1279           Depending on the selected kernel/user memory split, minimum
1280           vmalloc space and actual amount of RAM, you may not need this
1281           option which should result in a slightly faster kernel.
1282
1283           If unsure, say n.
1284
1285 config HIGHPTE
1286         bool "Allocate 2nd-level pagetables from highmem"
1287         depends on HIGHMEM
1288         depends on !OUTER_CACHE
1289
1290 config HW_PERF_EVENTS
1291         bool "Enable hardware performance counter support for perf events"
1292         depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
1293         default y
1294         help
1295           Enable hardware performance counter support for perf events. If
1296           disabled, perf events will use software events only.
1297
1298 source "mm/Kconfig"
1299
1300 config LEDS
1301         bool "Timer and CPU usage LEDs"
1302         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1303                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1304                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1305                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1306                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1307                    ARCH_AT91 || ARCH_DAVINCI || \
1308                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1309         help
1310           If you say Y here, the LEDs on your machine will be used
1311           to provide useful information about your current system status.
1312
1313           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1314           be able to select which LEDs are active using the options below. If
1315           you are compiling a kernel for the EBSA-110 or the LART however, the
1316           red LED will simply flash regularly to indicate that the system is
1317           still functional. It is safe to say Y here if you have a CATS
1318           system, but the driver will do nothing.
1319
1320 config LEDS_TIMER
1321         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1322                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1323                             || MACH_OMAP_PERSEUS2
1324         depends on LEDS
1325         depends on !GENERIC_CLOCKEVENTS
1326         default y if ARCH_EBSA110
1327         help
1328           If you say Y here, one of the system LEDs (the green one on the
1329           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1330           will flash regularly to indicate that the system is still
1331           operational. This is mainly useful to kernel hackers who are
1332           debugging unstable kernels.
1333
1334           The LART uses the same LED for both Timer LED and CPU usage LED
1335           functions. You may choose to use both, but the Timer LED function
1336           will overrule the CPU usage LED.
1337
1338 config LEDS_CPU
1339         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1340                         !ARCH_OMAP) \
1341                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1342                         || MACH_OMAP_PERSEUS2
1343         depends on LEDS
1344         help
1345           If you say Y here, the red LED will be used to give a good real
1346           time indication of CPU usage, by lighting whenever the idle task
1347           is not currently executing.
1348
1349           The LART uses the same LED for both Timer LED and CPU usage LED
1350           functions. You may choose to use both, but the Timer LED function
1351           will overrule the CPU usage LED.
1352
1353 config ALIGNMENT_TRAP
1354         bool
1355         depends on CPU_CP15_MMU
1356         default y if !ARCH_EBSA110
1357         select HAVE_PROC_CPU if PROC_FS
1358         help
1359           ARM processors cannot fetch/store information which is not
1360           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1361           address divisible by 4. On 32-bit ARM processors, these non-aligned
1362           fetch/store instructions will be emulated in software if you say
1363           here, which has a severe performance impact. This is necessary for
1364           correct operation of some network protocols. With an IP-only
1365           configuration it is safe to say N, otherwise say Y.
1366
1367 config UACCESS_WITH_MEMCPY
1368         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1369         depends on MMU && EXPERIMENTAL
1370         default y if CPU_FEROCEON
1371         help
1372           Implement faster copy_to_user and clear_user methods for CPU
1373           cores where a 8-word STM instruction give significantly higher
1374           memory write throughput than a sequence of individual 32bit stores.
1375
1376           A possible side effect is a slight increase in scheduling latency
1377           between threads sharing the same address space if they invoke
1378           such copy operations with large buffers.
1379
1380           However, if the CPU data cache is using a write-allocate mode,
1381           this option is unlikely to provide any performance gain.
1382
1383 endmenu
1384
1385 menu "Boot options"
1386
1387 # Compressed boot loader in ROM.  Yes, we really want to ask about
1388 # TEXT and BSS so we preserve their values in the config files.
1389 config ZBOOT_ROM_TEXT
1390         hex "Compressed ROM boot loader base address"
1391         default "0"
1392         help
1393           The physical address at which the ROM-able zImage is to be
1394           placed in the target.  Platforms which normally make use of
1395           ROM-able zImage formats normally set this to a suitable
1396           value in their defconfig file.
1397
1398           If ZBOOT_ROM is not enabled, this has no effect.
1399
1400 config ZBOOT_ROM_BSS
1401         hex "Compressed ROM boot loader BSS address"
1402         default "0"
1403         help
1404           The base address of an area of read/write memory in the target
1405           for the ROM-able zImage which must be available while the
1406           decompressor is running. It must be large enough to hold the
1407           entire decompressed kernel plus an additional 128 KiB.
1408           Platforms which normally make use of ROM-able zImage formats
1409           normally set this to a suitable value in their defconfig file.
1410
1411           If ZBOOT_ROM is not enabled, this has no effect.
1412
1413 config ZBOOT_ROM
1414         bool "Compressed boot loader in ROM/flash"
1415         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1416         help
1417           Say Y here if you intend to execute your compressed kernel image
1418           (zImage) directly from ROM or flash.  If unsure, say N.
1419
1420 config CMDLINE
1421         string "Default kernel command string"
1422         default ""
1423         help
1424           On some architectures (EBSA110 and CATS), there is currently no way
1425           for the boot loader to pass arguments to the kernel. For these
1426           architectures, you should supply some command-line options at build
1427           time by entering them here. As a minimum, you should specify the
1428           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1429
1430 config XIP_KERNEL
1431         bool "Kernel Execute-In-Place from ROM"
1432         depends on !ZBOOT_ROM
1433         help
1434           Execute-In-Place allows the kernel to run from non-volatile storage
1435           directly addressable by the CPU, such as NOR flash. This saves RAM
1436           space since the text section of the kernel is not loaded from flash
1437           to RAM.  Read-write sections, such as the data section and stack,
1438           are still copied to RAM.  The XIP kernel is not compressed since
1439           it has to run directly from flash, so it will take more space to
1440           store it.  The flash address used to link the kernel object files,
1441           and for storing it, is configuration dependent. Therefore, if you
1442           say Y here, you must know the proper physical address where to
1443           store the kernel image depending on your own flash memory usage.
1444
1445           Also note that the make target becomes "make xipImage" rather than
1446           "make zImage" or "make Image".  The final kernel binary to put in
1447           ROM memory will be arch/arm/boot/xipImage.
1448
1449           If unsure, say N.
1450
1451 config XIP_PHYS_ADDR
1452         hex "XIP Kernel Physical Location"
1453         depends on XIP_KERNEL
1454         default "0x00080000"
1455         help
1456           This is the physical address in your flash memory the kernel will
1457           be linked for and stored to.  This address is dependent on your
1458           own flash usage.
1459
1460 config KEXEC
1461         bool "Kexec system call (EXPERIMENTAL)"
1462         depends on EXPERIMENTAL
1463         help
1464           kexec is a system call that implements the ability to shutdown your
1465           current kernel, and to start another kernel.  It is like a reboot
1466           but it is independent of the system firmware.   And like a reboot
1467           you can start any kernel with it, not just Linux.
1468
1469           It is an ongoing process to be certain the hardware in a machine
1470           is properly shutdown, so do not be surprised if this code does not
1471           initially work for you.  It may help to enable device hotplugging
1472           support.
1473
1474 config ATAGS_PROC
1475         bool "Export atags in procfs"
1476         depends on KEXEC
1477         default y
1478         help
1479           Should the atags used to boot the kernel be exported in an "atags"
1480           file in procfs. Useful with kexec.
1481
1482 endmenu
1483
1484 menu "CPU Power Management"
1485
1486 if ARCH_HAS_CPUFREQ
1487
1488 source "drivers/cpufreq/Kconfig"
1489
1490 config CPU_FREQ_SA1100
1491         bool
1492
1493 config CPU_FREQ_SA1110
1494         bool
1495
1496 config CPU_FREQ_INTEGRATOR
1497         tristate "CPUfreq driver for ARM Integrator CPUs"
1498         depends on ARCH_INTEGRATOR && CPU_FREQ
1499         default y
1500         help
1501           This enables the CPUfreq driver for ARM Integrator CPUs.
1502
1503           For details, take a look at <file:Documentation/cpu-freq>.
1504
1505           If in doubt, say Y.
1506
1507 config CPU_FREQ_PXA
1508         bool
1509         depends on CPU_FREQ && ARCH_PXA && PXA25x
1510         default y
1511         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1512
1513 config CPU_FREQ_S3C64XX
1514         bool "CPUfreq support for Samsung S3C64XX CPUs"
1515         depends on CPU_FREQ && CPU_S3C6410
1516
1517 config CPU_FREQ_S3C
1518         bool
1519         help
1520           Internal configuration node for common cpufreq on Samsung SoC
1521
1522 config CPU_FREQ_S3C24XX
1523         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1524         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1525         select CPU_FREQ_S3C
1526         help
1527           This enables the CPUfreq driver for the Samsung S3C24XX family
1528           of CPUs.
1529
1530           For details, take a look at <file:Documentation/cpu-freq>.
1531
1532           If in doubt, say N.
1533
1534 config CPU_FREQ_S3C24XX_PLL
1535         bool "Support CPUfreq changing of PLL frequency"
1536         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1537         help
1538           Compile in support for changing the PLL frequency from the
1539           S3C24XX series CPUfreq driver. The PLL takes time to settle
1540           after a frequency change, so by default it is not enabled.
1541
1542           This also means that the PLL tables for the selected CPU(s) will
1543           be built which may increase the size of the kernel image.
1544
1545 config CPU_FREQ_S3C24XX_DEBUG
1546         bool "Debug CPUfreq Samsung driver core"
1547         depends on CPU_FREQ_S3C24XX
1548         help
1549           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1550
1551 config CPU_FREQ_S3C24XX_IODEBUG
1552         bool "Debug CPUfreq Samsung driver IO timing"
1553         depends on CPU_FREQ_S3C24XX
1554         help
1555           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1556
1557 config CPU_FREQ_S3C24XX_DEBUGFS
1558         bool "Export debugfs for CPUFreq"
1559         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1560         help
1561           Export status information via debugfs.
1562
1563 endif
1564
1565 source "drivers/cpuidle/Kconfig"
1566
1567 endmenu
1568
1569 menu "Floating point emulation"
1570
1571 comment "At least one emulation must be selected"
1572
1573 config FPE_NWFPE
1574         bool "NWFPE math emulation"
1575         depends on !AEABI || OABI_COMPAT
1576         ---help---
1577           Say Y to include the NWFPE floating point emulator in the kernel.
1578           This is necessary to run most binaries. Linux does not currently
1579           support floating point hardware so you need to say Y here even if
1580           your machine has an FPA or floating point co-processor podule.
1581
1582           You may say N here if you are going to load the Acorn FPEmulator
1583           early in the bootup.
1584
1585 config FPE_NWFPE_XP
1586         bool "Support extended precision"
1587         depends on FPE_NWFPE
1588         help
1589           Say Y to include 80-bit support in the kernel floating-point
1590           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1591           Note that gcc does not generate 80-bit operations by default,
1592           so in most cases this option only enlarges the size of the
1593           floating point emulator without any good reason.
1594
1595           You almost surely want to say N here.
1596
1597 config FPE_FASTFPE
1598         bool "FastFPE math emulation (EXPERIMENTAL)"
1599         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1600         ---help---
1601           Say Y here to include the FAST floating point emulator in the kernel.
1602           This is an experimental much faster emulator which now also has full
1603           precision for the mantissa.  It does not support any exceptions.
1604           It is very simple, and approximately 3-6 times faster than NWFPE.
1605
1606           It should be sufficient for most programs.  It may be not suitable
1607           for scientific calculations, but you have to check this for yourself.
1608           If you do not feel you need a faster FP emulation you should better
1609           choose NWFPE.
1610
1611 config VFP
1612         bool "VFP-format floating point maths"
1613         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1614         help
1615           Say Y to include VFP support code in the kernel. This is needed
1616           if your hardware includes a VFP unit.
1617
1618           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1619           release notes and additional status information.
1620
1621           Say N if your target does not have VFP hardware.
1622
1623 config VFPv3
1624         bool
1625         depends on VFP
1626         default y if CPU_V7
1627
1628 config NEON
1629         bool "Advanced SIMD (NEON) Extension support"
1630         depends on VFPv3 && CPU_V7
1631         help
1632           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1633           Extension.
1634
1635 endmenu
1636
1637 menu "Userspace binary formats"
1638
1639 source "fs/Kconfig.binfmt"
1640
1641 config ARTHUR
1642         tristate "RISC OS personality"
1643         depends on !AEABI
1644         help
1645           Say Y here to include the kernel code necessary if you want to run
1646           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1647           experimental; if this sounds frightening, say N and sleep in peace.
1648           You can also say M here to compile this support as a module (which
1649           will be called arthur).
1650
1651 endmenu
1652
1653 menu "Power management options"
1654
1655 source "kernel/power/Kconfig"
1656
1657 config ARCH_SUSPEND_POSSIBLE
1658         def_bool y
1659
1660 endmenu
1661
1662 source "net/Kconfig"
1663
1664 source "drivers/Kconfig"
1665
1666 source "fs/Kconfig"
1667
1668 source "arch/arm/Kconfig.debug"
1669
1670 source "security/Kconfig"
1671
1672 source "crypto/Kconfig"
1673
1674 source "lib/Kconfig"