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 CPU_V6
 614         select GENERIC_TIME
 615         select GENERIC_CLOCKEVENTS
 616         help
 617           Support for Qualcomm MSM7K based systems.  This runs on the ARM11
 618           apps processor of the MSM7K and depends on a shared memory
 619           interface to the ARM9 modem processor which runs the baseband stack
 620           and controls some vital subsystems (clock and power control, etc).
 621
 622 config ARCH_SHMOBILE
 623         bool "Renesas SH-Mobile"
 624         help
 625           Support for Renesas's SH-Mobile ARM platforms
 626
 627 config ARCH_RPC
 628         bool "RiscPC"
 629         select ARCH_ACORN
 630         select FIQ
 631         select TIMER_ACORN
 632         select ARCH_MAY_HAVE_PC_FDC
 633         select HAVE_PATA_PLATFORM
 634         select ISA_DMA_API
 635         select NO_IOPORT
 636         select ARCH_SPARSEMEM_ENABLE
 637         help
 638           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 639           CD-ROM interface, serial and parallel port, and the floppy drive.
 640
 641 config ARCH_SA1100
 642         bool "SA1100-based"
 643         select CPU_SA1100
 644         select ISA
 645         select ARCH_SPARSEMEM_ENABLE
 646         select ARCH_MTD_XIP
 647         select ARCH_HAS_CPUFREQ
 648         select CPU_FREQ
 649         select GENERIC_GPIO
 650         select GENERIC_TIME
 651         select GENERIC_CLOCKEVENTS
 652         select HAVE_CLK
 653         select TICK_ONESHOT
 654         select ARCH_REQUIRE_GPIOLIB
 655         help
 656           Support for StrongARM 11x0 based boards.
 657
 658 config ARCH_S3C2410
 659         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 660         select GENERIC_GPIO
 661         select ARCH_HAS_CPUFREQ
 662         select HAVE_CLK
 663         help
 664           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 665           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 666           the Samsung SMDK2410 development board (and derivatives).
 667
 668 config ARCH_S3C64XX
 669         bool "Samsung S3C64XX"
 670         select PLAT_SAMSUNG
 671         select CPU_V6
 672         select GENERIC_GPIO
 673         select ARM_VIC
 674         select HAVE_CLK
 675         select NO_IOPORT
 676         select ARCH_HAS_CPUFREQ
 677         select ARCH_REQUIRE_GPIOLIB
 678         select SAMSUNG_CLKSRC
 679         select SAMSUNG_IRQ_VIC_TIMER
 680         select SAMSUNG_IRQ_UART
 681         select S3C_GPIO_TRACK
 682         select S3C_GPIO_PULL_UPDOWN
 683         select S3C_GPIO_CFG_S3C24XX
 684         select S3C_GPIO_CFG_S3C64XX
 685         select S3C_DEV_NAND
 686         select USB_ARCH_HAS_OHCI
 687         select SAMSUNG_GPIOLIB_4BIT
 688         help
 689           Samsung S3C64XX series based systems
 690
 691 config ARCH_S5P6440
 692         bool "Samsung S5P6440"
 693         select CPU_V6
 694         select GENERIC_GPIO
 695         select HAVE_CLK
 696         help
 697           Samsung S5P6440 CPU based systems
 698
 699 config ARCH_S5P6442
 700         bool "Samsung S5P6442"
 701         select CPU_V6
 702         select GENERIC_GPIO
 703         select HAVE_CLK
 704         help
 705           Samsung S5P6442 CPU based systems
 706
 707 config ARCH_S5PC1XX
 708         bool "Samsung S5PC1XX"
 709         select GENERIC_GPIO
 710         select HAVE_CLK
 711         select CPU_V7
 712         select ARM_L1_CACHE_SHIFT_6
 713         help
 714           Samsung S5PC1XX series based systems
 715
 716 config ARCH_S5PV210
 717         bool "Samsung S5PV210/S5PC110"
 718         select CPU_V7
 719         select GENERIC_GPIO
 720         select HAVE_CLK
 721         select ARM_L1_CACHE_SHIFT_6
 722         help
 723           Samsung S5PV210/S5PC110 series based systems
 724
 725 config ARCH_SHARK
 726         bool "Shark"
 727         select CPU_SA110
 728         select ISA
 729         select ISA_DMA
 730         select ZONE_DMA
 731         select PCI
 732         help
 733           Support for the StrongARM based Digital DNARD machine, also known
 734           as "Shark" (<http://www.shark-linux.de/shark.html>).
 735
 736 config ARCH_LH7A40X
 737         bool "Sharp LH7A40X"
 738         select CPU_ARM922T
 739         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 740         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 741         help
 742           Say Y here for systems based on one of the Sharp LH7A40X
 743           System on a Chip processors.  These CPUs include an ARM922T
 744           core with a wide array of integrated devices for
 745           hand-held and low-power applications.
 746
 747 config ARCH_U300
 748         bool "ST-Ericsson U300 Series"
 749         depends on MMU
 750         select CPU_ARM926T
 751         select HAVE_TCM
 752         select ARM_AMBA
 753         select ARM_VIC
 754         select GENERIC_TIME
 755         select GENERIC_CLOCKEVENTS
 756         select HAVE_CLK
 757         select COMMON_CLKDEV
 758         select GENERIC_GPIO
 759         help
 760           Support for ST-Ericsson U300 series mobile platforms.
 761
 762 config ARCH_U8500
 763         bool "ST-Ericsson U8500 Series"
 764         select CPU_V7
 765         select ARM_AMBA
 766         select GENERIC_TIME
 767         select GENERIC_CLOCKEVENTS
 768         select COMMON_CLKDEV
 769         help
 770           Support for ST-Ericsson's Ux500 architecture
 771
 772 config ARCH_NOMADIK
 773         bool "STMicroelectronics Nomadik"
 774         select ARM_AMBA
 775         select ARM_VIC
 776         select CPU_ARM926T
 777         select HAVE_CLK
 778         select COMMON_CLKDEV
 779         select GENERIC_TIME
 780         select GENERIC_CLOCKEVENTS
 781         select GENERIC_GPIO
 782         select ARCH_REQUIRE_GPIOLIB
 783         help
 784           Support for the Nomadik platform by ST-Ericsson
 785
 786 config ARCH_DAVINCI
 787         bool "TI DaVinci"
 788         select CPU_ARM926T
 789         select GENERIC_TIME
 790         select GENERIC_CLOCKEVENTS
 791         select GENERIC_GPIO
 792         select ARCH_REQUIRE_GPIOLIB
 793         select HAVE_CLK
 794         select ZONE_DMA
 795         select HAVE_IDE
 796         select COMMON_CLKDEV
 797         select GENERIC_ALLOCATOR
 798         select ARCH_HAS_HOLES_MEMORYMODEL
 799         help
 800           Support for TI's DaVinci platform.
 801
 802 config ARCH_OMAP
 803         bool "TI OMAP"
 804         select GENERIC_GPIO
 805         select HAVE_CLK
 806         select ARCH_REQUIRE_GPIOLIB
 807         select ARCH_HAS_CPUFREQ
 808         select GENERIC_TIME
 809         select GENERIC_CLOCKEVENTS
 810         select ARCH_HAS_HOLES_MEMORYMODEL
 811         help
 812           Support for TI's OMAP platform (OMAP1 and OMAP2).
 813
 814 endchoice
 815
 816 #
 817 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 818 # Kconfigs may be included either alphabetically (according to the
 819 # plat- suffix) or along side the corresponding mach-* source.
 820 #
 821 source "arch/arm/mach-aaec2000/Kconfig"
 822
 823 source "arch/arm/mach-at91/Kconfig"
 824
 825 source "arch/arm/mach-bcmring/Kconfig"
 826
 827 source "arch/arm/mach-clps711x/Kconfig"
 828
 829 source "arch/arm/mach-cns3xxx/Kconfig"
 830
 831 source "arch/arm/mach-davinci/Kconfig"
 832
 833 source "arch/arm/mach-dove/Kconfig"
 834
 835 source "arch/arm/mach-ep93xx/Kconfig"
 836
 837 source "arch/arm/mach-footbridge/Kconfig"
 838
 839 source "arch/arm/mach-gemini/Kconfig"
 840
 841 source "arch/arm/mach-h720x/Kconfig"
 842
 843 source "arch/arm/mach-integrator/Kconfig"
 844
 845 source "arch/arm/mach-iop32x/Kconfig"
 846
 847 source "arch/arm/mach-iop33x/Kconfig"
 848
 849 source "arch/arm/mach-iop13xx/Kconfig"
 850
 851 source "arch/arm/mach-ixp4xx/Kconfig"
 852
 853 source "arch/arm/mach-ixp2000/Kconfig"
 854
 855 source "arch/arm/mach-ixp23xx/Kconfig"
 856
 857 source "arch/arm/mach-kirkwood/Kconfig"
 858
 859 source "arch/arm/mach-ks8695/Kconfig"
 860
 861 source "arch/arm/mach-lh7a40x/Kconfig"
 862
 863 source "arch/arm/mach-loki/Kconfig"
 864
 865 source "arch/arm/mach-msm/Kconfig"
 866
 867 source "arch/arm/mach-mv78xx0/Kconfig"
 868
 869 source "arch/arm/plat-mxc/Kconfig"
 870
 871 source "arch/arm/mach-netx/Kconfig"
 872
 873 source "arch/arm/mach-nomadik/Kconfig"
 874 source "arch/arm/plat-nomadik/Kconfig"
 875
 876 source "arch/arm/mach-ns9xxx/Kconfig"
 877
 878 source "arch/arm/mach-nuc93x/Kconfig"
 879
 880 source "arch/arm/plat-omap/Kconfig"
 881
 882 source "arch/arm/mach-omap1/Kconfig"
 883
 884 source "arch/arm/mach-omap2/Kconfig"
 885
 886 source "arch/arm/mach-orion5x/Kconfig"
 887
 888 source "arch/arm/mach-pxa/Kconfig"
 889 source "arch/arm/plat-pxa/Kconfig"
 890
 891 source "arch/arm/mach-mmp/Kconfig"
 892
 893 source "arch/arm/mach-realview/Kconfig"
 894
 895 source "arch/arm/mach-sa1100/Kconfig"
 896
 897 source "arch/arm/plat-samsung/Kconfig"
 898 source "arch/arm/plat-s3c24xx/Kconfig"
 899 source "arch/arm/plat-s5p/Kconfig"
 900 source "arch/arm/plat-s5pc1xx/Kconfig"
 901
 902 if ARCH_S3C2410
 903 source "arch/arm/mach-s3c2400/Kconfig"
 904 source "arch/arm/mach-s3c2410/Kconfig"
 905 source "arch/arm/mach-s3c2412/Kconfig"
 906 source "arch/arm/mach-s3c2440/Kconfig"
 907 source "arch/arm/mach-s3c2443/Kconfig"
 908 endif
 909
 910 if ARCH_S3C64XX
 911 source "arch/arm/mach-s3c64xx/Kconfig"
 912 endif
 913
 914 source "arch/arm/mach-s5p6440/Kconfig"
 915
 916 source "arch/arm/mach-s5p6442/Kconfig"
 917
 918 if ARCH_S5PC1XX
 919 source "arch/arm/mach-s5pc100/Kconfig"
 920 endif
 921
 922 source "arch/arm/mach-s5pv210/Kconfig"
 923
 924 source "arch/arm/mach-shmobile/Kconfig"
 925
 926 source "arch/arm/plat-stmp3xxx/Kconfig"
 927
 928 source "arch/arm/mach-u300/Kconfig"
 929
 930 source "arch/arm/mach-ux500/Kconfig"
 931
 932 source "arch/arm/mach-versatile/Kconfig"
 933
 934 source "arch/arm/mach-w90x900/Kconfig"
 935
 936 # Definitions to make life easier
 937 config ARCH_ACORN
 938         bool
 939
 940 config PLAT_IOP
 941         bool
 942         select GENERIC_CLOCKEVENTS
 943         select GENERIC_TIME
 944
 945 config PLAT_ORION
 946         bool
 947
 948 config PLAT_PXA
 949         bool
 950
 951 source arch/arm/mm/Kconfig
 952
 953 config IWMMXT
 954         bool "Enable iWMMXt support"
 955         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 956         default y if PXA27x || PXA3xx || ARCH_MMP
 957         help
 958           Enable support for iWMMXt context switching at run time if
 959           running on a CPU that supports it.
 960
 961 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 962 config XSCALE_PMU
 963         bool
 964         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 965         default y
 966
 967 config CPU_HAS_PMU
 968         depends on CPU_V6 || CPU_V7 || XSCALE_PMU
 969         default y
 970         bool
 971
 972 if !MMU
 973 source "arch/arm/Kconfig-nommu"
 974 endif
 975
 976 config ARM_ERRATA_411920
 977         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 978         depends on CPU_V6 && !SMP
 979         help
 980           Invalidation of the Instruction Cache operation can
 981           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 982           It does not affect the MPCore. This option enables the ARM Ltd.
 983           recommended workaround.
 984
 985 config ARM_ERRATA_430973
 986         bool "ARM errata: Stale prediction on replaced interworking branch"
 987         depends on CPU_V7
 988         help
 989           This option enables the workaround for the 430973 Cortex-A8
 990           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 991           interworking branch is replaced with another code sequence at the
 992           same virtual address, whether due to self-modifying code or virtual
 993           to physical address re-mapping, Cortex-A8 does not recover from the
 994           stale interworking branch prediction. This results in Cortex-A8
 995           executing the new code sequence in the incorrect ARM or Thumb state.
 996           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 997           and also flushes the branch target cache at every context switch.
 998           Note that setting specific bits in the ACTLR register may not be
 999           available in non-secure mode.
1000
1001 config ARM_ERRATA_458693
1002         bool "ARM errata: Processor deadlock when a false hazard is created"
1003         depends on CPU_V7
1004         help
1005           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1006           erratum. For very specific sequences of memory operations, it is
1007           possible for a hazard condition intended for a cache line to instead
1008           be incorrectly associated with a different cache line. This false
1009           hazard might then cause a processor deadlock. The workaround enables
1010           the L1 caching of the NEON accesses and disables the PLD instruction
1011           in the ACTLR register. Note that setting specific bits in the ACTLR
1012           register may not be available in non-secure mode.
1013
1014 config ARM_ERRATA_460075
1015         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1016         depends on CPU_V7
1017         help
1018           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1019           erratum. Any asynchronous access to the L2 cache may encounter a
1020           situation in which recent store transactions to the L2 cache are lost
1021           and overwritten with stale memory contents from external memory. The
1022           workaround disables the write-allocate mode for the L2 cache via the
1023           ACTLR register. Note that setting specific bits in the ACTLR register
1024           may not be available in non-secure mode.
1025
1026 config PL310_ERRATA_588369
1027         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1028         depends on CACHE_L2X0 && ARCH_OMAP4
1029         help
1030            The PL310 L2 cache controller implements three types of Clean &
1031            Invalidate maintenance operations: by Physical Address
1032            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1033            They are architecturally defined to behave as the execution of a
1034            clean operation followed immediately by an invalidate operation,
1035            both performing to the same memory location. This functionality
1036            is not correctly implemented in PL310 as clean lines are not
1037            invalidated as a result of these operations. Note that this errata
1038            uses Texas Instrument's secure monitor api.
1039 endmenu
1040
1041 source "arch/arm/common/Kconfig"
1042
1043 config FORCE_MAX_ZONEORDER
1044         int
1045         depends on SA1111
1046         default "9"
1047
1048 menu "Bus support"
1049
1050 config ARM_AMBA
1051         bool
1052
1053 config ISA
1054         bool
1055         help
1056           Find out whether you have ISA slots on your motherboard.  ISA is the
1057           name of a bus system, i.e. the way the CPU talks to the other stuff
1058           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1059           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1060           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1061
1062 # Select ISA DMA controller support
1063 config ISA_DMA
1064         bool
1065         select ISA_DMA_API
1066
1067 # Select ISA DMA interface
1068 config ISA_DMA_API
1069         bool
1070
1071 config PCI
1072         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1073         help
1074           Find out whether you have a PCI motherboard. PCI is the name of a
1075           bus system, i.e. the way the CPU talks to the other stuff inside
1076           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1077           VESA. If you have PCI, say Y, otherwise N.
1078
1079 config PCI_SYSCALL
1080         def_bool PCI
1081
1082 # Select the host bridge type
1083 config PCI_HOST_VIA82C505
1084         bool
1085         depends on PCI && ARCH_SHARK
1086         default y
1087
1088 config PCI_HOST_ITE8152
1089         bool
1090         depends on PCI && MACH_ARMCORE
1091         default y
1092         select DMABOUNCE
1093
1094 source "drivers/pci/Kconfig"
1095
1096 source "drivers/pcmcia/Kconfig"
1097
1098 endmenu
1099
1100 menu "Kernel Features"
1101
1102 source "kernel/time/Kconfig"
1103
1104 config SMP
1105         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1106         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1107                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1108         depends on GENERIC_CLOCKEVENTS
1109         select USE_GENERIC_SMP_HELPERS
1110         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1111         help
1112           This enables support for systems with more than one CPU. If you have
1113           a system with only one CPU, like most personal computers, say N. If
1114           you have a system with more than one CPU, say Y.
1115
1116           If you say N here, the kernel will run on single and multiprocessor
1117           machines, but will use only one CPU of a multiprocessor machine. If
1118           you say Y here, the kernel will run on many, but not all, single
1119           processor machines. On a single processor machine, the kernel will
1120           run faster if you say N here.
1121
1122           See also <file:Documentation/i386/IO-APIC.txt>,
1123           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1124           <http://www.linuxdoc.org/docs.html#howto>.
1125
1126           If you don't know what to do here, say N.
1127
1128 config HAVE_ARM_SCU
1129         bool
1130         depends on SMP
1131         help
1132           This option enables support for the ARM system coherency unit
1133
1134 config HAVE_ARM_TWD
1135         bool
1136         depends on SMP
1137         help
1138           This options enables support for the ARM timer and watchdog unit
1139
1140 choice
1141         prompt "Memory split"
1142         default VMSPLIT_3G
1143         help
1144           Select the desired split between kernel and user memory.
1145
1146           If you are not absolutely sure what you are doing, leave this
1147           option alone!
1148
1149         config VMSPLIT_3G
1150                 bool "3G/1G user/kernel split"
1151         config VMSPLIT_2G
1152                 bool "2G/2G user/kernel split"
1153         config VMSPLIT_1G
1154                 bool "1G/3G user/kernel split"
1155 endchoice
1156
1157 config PAGE_OFFSET
1158         hex
1159         default 0x40000000 if VMSPLIT_1G
1160         default 0x80000000 if VMSPLIT_2G
1161         default 0xC0000000
1162
1163 config NR_CPUS
1164         int "Maximum number of CPUs (2-32)"
1165         range 2 32
1166         depends on SMP
1167         default "4"
1168
1169 config HOTPLUG_CPU
1170         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1171         depends on SMP && HOTPLUG && EXPERIMENTAL
1172         help
1173           Say Y here to experiment with turning CPUs off and on.  CPUs
1174           can be controlled through /sys/devices/system/cpu.
1175
1176 config LOCAL_TIMERS
1177         bool "Use local timer interrupts"
1178         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1179                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1180         default y
1181         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1182         help
1183           Enable support for local timers on SMP platforms, rather then the
1184           legacy IPI broadcast method.  Local timers allows the system
1185           accounting to be spread across the timer interval, preventing a
1186           "thundering herd" at every timer tick.
1187
1188 source kernel/Kconfig.preempt
1189
1190 config HZ
1191         int
1192         default 128 if ARCH_L7200
1193         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
1194         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1195         default AT91_TIMER_HZ if ARCH_AT91
1196         default 100
1197
1198 config THUMB2_KERNEL
1199         bool "Compile the kernel in Thumb-2 mode"
1200         depends on CPU_V7 && EXPERIMENTAL
1201         select AEABI
1202         select ARM_ASM_UNIFIED
1203         help
1204           By enabling this option, the kernel will be compiled in
1205           Thumb-2 mode. A compiler/assembler that understand the unified
1206           ARM-Thumb syntax is needed.
1207
1208           If unsure, say N.
1209
1210 config ARM_ASM_UNIFIED
1211         bool
1212
1213 config AEABI
1214         bool "Use the ARM EABI to compile the kernel"
1215         help
1216           This option allows for the kernel to be compiled using the latest
1217           ARM ABI (aka EABI).  This is only useful if you are using a user
1218           space environment that is also compiled with EABI.
1219
1220           Since there are major incompatibilities between the legacy ABI and
1221           EABI, especially with regard to structure member alignment, this
1222           option also changes the kernel syscall calling convention to
1223           disambiguate both ABIs and allow for backward compatibility support
1224           (selected with CONFIG_OABI_COMPAT).
1225
1226           To use this you need GCC version 4.0.0 or later.
1227
1228 config OABI_COMPAT
1229         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1230         depends on AEABI && EXPERIMENTAL
1231         default y
1232         help
1233           This option preserves the old syscall interface along with the
1234           new (ARM EABI) one. It also provides a compatibility layer to
1235           intercept syscalls that have structure arguments which layout
1236           in memory differs between the legacy ABI and the new ARM EABI
1237           (only for non "thumb" binaries). This option adds a tiny
1238           overhead to all syscalls and produces a slightly larger kernel.
1239           If you know you'll be using only pure EABI user space then you
1240           can say N here. If this option is not selected and you attempt
1241           to execute a legacy ABI binary then the result will be
1242           UNPREDICTABLE (in fact it can be predicted that it won't work
1243           at all). If in doubt say Y.
1244
1245 config ARCH_HAS_HOLES_MEMORYMODEL
1246         bool
1247
1248 # Discontigmem is deprecated
1249 config ARCH_DISCONTIGMEM_ENABLE
1250         bool
1251
1252 config ARCH_SPARSEMEM_ENABLE
1253         bool
1254
1255 config ARCH_SPARSEMEM_DEFAULT
1256         def_bool ARCH_SPARSEMEM_ENABLE
1257
1258 config ARCH_SELECT_MEMORY_MODEL
1259         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1260
1261 config NODES_SHIFT
1262         int
1263         default "4" if ARCH_LH7A40X
1264         default "2"
1265         depends on NEED_MULTIPLE_NODES
1266
1267 config HIGHMEM
1268         bool "High Memory Support (EXPERIMENTAL)"
1269         depends on MMU && EXPERIMENTAL
1270         help
1271           The address space of ARM processors is only 4 Gigabytes large
1272           and it has to accommodate user address space, kernel address
1273           space as well as some memory mapped IO. That means that, if you
1274           have a large amount of physical memory and/or IO, not all of the
1275           memory can be "permanently mapped" by the kernel. The physical
1276           memory that is not permanently mapped is called "high memory".
1277
1278           Depending on the selected kernel/user memory split, minimum
1279           vmalloc space and actual amount of RAM, you may not need this
1280           option which should result in a slightly faster kernel.
1281
1282           If unsure, say n.
1283
1284 config HIGHPTE
1285         bool "Allocate 2nd-level pagetables from highmem"
1286         depends on HIGHMEM
1287         depends on !OUTER_CACHE
1288
1289 config HW_PERF_EVENTS
1290         bool "Enable hardware performance counter support for perf events"
1291         depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
1292         default y
1293         help
1294           Enable hardware performance counter support for perf events. If
1295           disabled, perf events will use software events only.
1296
1297 source "mm/Kconfig"
1298
1299 config LEDS
1300         bool "Timer and CPU usage LEDs"
1301         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1302                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1303                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1304                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1305                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1306                    ARCH_AT91 || ARCH_DAVINCI || \
1307                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1308         help
1309           If you say Y here, the LEDs on your machine will be used
1310           to provide useful information about your current system status.
1311
1312           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1313           be able to select which LEDs are active using the options below. If
1314           you are compiling a kernel for the EBSA-110 or the LART however, the
1315           red LED will simply flash regularly to indicate that the system is
1316           still functional. It is safe to say Y here if you have a CATS
1317           system, but the driver will do nothing.
1318
1319 config LEDS_TIMER
1320         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1321                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1322                             || MACH_OMAP_PERSEUS2
1323         depends on LEDS
1324         depends on !GENERIC_CLOCKEVENTS
1325         default y if ARCH_EBSA110
1326         help
1327           If you say Y here, one of the system LEDs (the green one on the
1328           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1329           will flash regularly to indicate that the system is still
1330           operational. This is mainly useful to kernel hackers who are
1331           debugging unstable kernels.
1332
1333           The LART uses the same LED for both Timer LED and CPU usage LED
1334           functions. You may choose to use both, but the Timer LED function
1335           will overrule the CPU usage LED.
1336
1337 config LEDS_CPU
1338         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1339                         !ARCH_OMAP) \
1340                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1341                         || MACH_OMAP_PERSEUS2
1342         depends on LEDS
1343         help
1344           If you say Y here, the red LED will be used to give a good real
1345           time indication of CPU usage, by lighting whenever the idle task
1346           is not currently executing.
1347
1348           The LART uses the same LED for both Timer LED and CPU usage LED
1349           functions. You may choose to use both, but the Timer LED function
1350           will overrule the CPU usage LED.
1351
1352 config ALIGNMENT_TRAP
1353         bool
1354         depends on CPU_CP15_MMU
1355         default y if !ARCH_EBSA110
1356         select HAVE_PROC_CPU if PROC_FS
1357         help
1358           ARM processors cannot fetch/store information which is not
1359           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1360           address divisible by 4. On 32-bit ARM processors, these non-aligned
1361           fetch/store instructions will be emulated in software if you say
1362           here, which has a severe performance impact. This is necessary for
1363           correct operation of some network protocols. With an IP-only
1364           configuration it is safe to say N, otherwise say Y.
1365
1366 config UACCESS_WITH_MEMCPY
1367         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1368         depends on MMU && EXPERIMENTAL
1369         default y if CPU_FEROCEON
1370         help
1371           Implement faster copy_to_user and clear_user methods for CPU
1372           cores where a 8-word STM instruction give significantly higher
1373           memory write throughput than a sequence of individual 32bit stores.
1374
1375           A possible side effect is a slight increase in scheduling latency
1376           between threads sharing the same address space if they invoke
1377           such copy operations with large buffers.
1378
1379           However, if the CPU data cache is using a write-allocate mode,
1380           this option is unlikely to provide any performance gain.
1381
1382 endmenu
1383
1384 menu "Boot options"
1385
1386 # Compressed boot loader in ROM.  Yes, we really want to ask about
1387 # TEXT and BSS so we preserve their values in the config files.
1388 config ZBOOT_ROM_TEXT
1389         hex "Compressed ROM boot loader base address"
1390         default "0"
1391         help
1392           The physical address at which the ROM-able zImage is to be
1393           placed in the target.  Platforms which normally make use of
1394           ROM-able zImage formats normally set this to a suitable
1395           value in their defconfig file.
1396
1397           If ZBOOT_ROM is not enabled, this has no effect.
1398
1399 config ZBOOT_ROM_BSS
1400         hex "Compressed ROM boot loader BSS address"
1401         default "0"
1402         help
1403           The base address of an area of read/write memory in the target
1404           for the ROM-able zImage which must be available while the
1405           decompressor is running. It must be large enough to hold the
1406           entire decompressed kernel plus an additional 128 KiB.
1407           Platforms which normally make use of ROM-able zImage formats
1408           normally set this to a suitable value in their defconfig file.
1409
1410           If ZBOOT_ROM is not enabled, this has no effect.
1411
1412 config ZBOOT_ROM
1413         bool "Compressed boot loader in ROM/flash"
1414         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1415         help
1416           Say Y here if you intend to execute your compressed kernel image
1417           (zImage) directly from ROM or flash.  If unsure, say N.
1418
1419 config CMDLINE
1420         string "Default kernel command string"
1421         default ""
1422         help
1423           On some architectures (EBSA110 and CATS), there is currently no way
1424           for the boot loader to pass arguments to the kernel. For these
1425           architectures, you should supply some command-line options at build
1426           time by entering them here. As a minimum, you should specify the
1427           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1428
1429 config XIP_KERNEL
1430         bool "Kernel Execute-In-Place from ROM"
1431         depends on !ZBOOT_ROM
1432         help
1433           Execute-In-Place allows the kernel to run from non-volatile storage
1434           directly addressable by the CPU, such as NOR flash. This saves RAM
1435           space since the text section of the kernel is not loaded from flash
1436           to RAM.  Read-write sections, such as the data section and stack,
1437           are still copied to RAM.  The XIP kernel is not compressed since
1438           it has to run directly from flash, so it will take more space to
1439           store it.  The flash address used to link the kernel object files,
1440           and for storing it, is configuration dependent. Therefore, if you
1441           say Y here, you must know the proper physical address where to
1442           store the kernel image depending on your own flash memory usage.
1443
1444           Also note that the make target becomes "make xipImage" rather than
1445           "make zImage" or "make Image".  The final kernel binary to put in
1446           ROM memory will be arch/arm/boot/xipImage.
1447
1448           If unsure, say N.
1449
1450 config XIP_PHYS_ADDR
1451         hex "XIP Kernel Physical Location"
1452         depends on XIP_KERNEL
1453         default "0x00080000"
1454         help
1455           This is the physical address in your flash memory the kernel will
1456           be linked for and stored to.  This address is dependent on your
1457           own flash usage.
1458
1459 config KEXEC
1460         bool "Kexec system call (EXPERIMENTAL)"
1461         depends on EXPERIMENTAL
1462         help
1463           kexec is a system call that implements the ability to shutdown your
1464           current kernel, and to start another kernel.  It is like a reboot
1465           but it is independent of the system firmware.   And like a reboot
1466           you can start any kernel with it, not just Linux.
1467
1468           It is an ongoing process to be certain the hardware in a machine
1469           is properly shutdown, so do not be surprised if this code does not
1470           initially work for you.  It may help to enable device hotplugging
1471           support.
1472
1473 config ATAGS_PROC
1474         bool "Export atags in procfs"
1475         depends on KEXEC
1476         default y
1477         help
1478           Should the atags used to boot the kernel be exported in an "atags"
1479           file in procfs. Useful with kexec.
1480
1481 endmenu
1482
1483 menu "CPU Power Management"
1484
1485 if ARCH_HAS_CPUFREQ
1486
1487 source "drivers/cpufreq/Kconfig"
1488
1489 config CPU_FREQ_SA1100
1490         bool
1491
1492 config CPU_FREQ_SA1110
1493         bool
1494
1495 config CPU_FREQ_INTEGRATOR
1496         tristate "CPUfreq driver for ARM Integrator CPUs"
1497         depends on ARCH_INTEGRATOR && CPU_FREQ
1498         default y
1499         help
1500           This enables the CPUfreq driver for ARM Integrator CPUs.
1501
1502           For details, take a look at <file:Documentation/cpu-freq>.
1503
1504           If in doubt, say Y.
1505
1506 config CPU_FREQ_PXA
1507         bool
1508         depends on CPU_FREQ && ARCH_PXA && PXA25x
1509         default y
1510         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1511
1512 config CPU_FREQ_S3C64XX
1513         bool "CPUfreq support for Samsung S3C64XX CPUs"
1514         depends on CPU_FREQ && CPU_S3C6410
1515
1516 config CPU_FREQ_S3C
1517         bool
1518         help
1519           Internal configuration node for common cpufreq on Samsung SoC
1520
1521 config CPU_FREQ_S3C24XX
1522         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1523         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1524         select CPU_FREQ_S3C
1525         help
1526           This enables the CPUfreq driver for the Samsung S3C24XX family
1527           of CPUs.
1528
1529           For details, take a look at <file:Documentation/cpu-freq>.
1530
1531           If in doubt, say N.
1532
1533 config CPU_FREQ_S3C24XX_PLL
1534         bool "Support CPUfreq changing of PLL frequency"
1535         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1536         help
1537           Compile in support for changing the PLL frequency from the
1538           S3C24XX series CPUfreq driver. The PLL takes time to settle
1539           after a frequency change, so by default it is not enabled.
1540
1541           This also means that the PLL tables for the selected CPU(s) will
1542           be built which may increase the size of the kernel image.
1543
1544 config CPU_FREQ_S3C24XX_DEBUG
1545         bool "Debug CPUfreq Samsung driver core"
1546         depends on CPU_FREQ_S3C24XX
1547         help
1548           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1549
1550 config CPU_FREQ_S3C24XX_IODEBUG
1551         bool "Debug CPUfreq Samsung driver IO timing"
1552         depends on CPU_FREQ_S3C24XX
1553         help
1554           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1555
1556 config CPU_FREQ_S3C24XX_DEBUGFS
1557         bool "Export debugfs for CPUFreq"
1558         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1559         help
1560           Export status information via debugfs.
1561
1562 endif
1563
1564 source "drivers/cpuidle/Kconfig"
1565
1566 endmenu
1567
1568 menu "Floating point emulation"
1569
1570 comment "At least one emulation must be selected"
1571
1572 config FPE_NWFPE
1573         bool "NWFPE math emulation"
1574         depends on !AEABI || OABI_COMPAT
1575         ---help---
1576           Say Y to include the NWFPE floating point emulator in the kernel.
1577           This is necessary to run most binaries. Linux does not currently
1578           support floating point hardware so you need to say Y here even if
1579           your machine has an FPA or floating point co-processor podule.
1580
1581           You may say N here if you are going to load the Acorn FPEmulator
1582           early in the bootup.
1583
1584 config FPE_NWFPE_XP
1585         bool "Support extended precision"
1586         depends on FPE_NWFPE
1587         help
1588           Say Y to include 80-bit support in the kernel floating-point
1589           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1590           Note that gcc does not generate 80-bit operations by default,
1591           so in most cases this option only enlarges the size of the
1592           floating point emulator without any good reason.
1593
1594           You almost surely want to say N here.
1595
1596 config FPE_FASTFPE
1597         bool "FastFPE math emulation (EXPERIMENTAL)"
1598         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1599         ---help---
1600           Say Y here to include the FAST floating point emulator in the kernel.
1601           This is an experimental much faster emulator which now also has full
1602           precision for the mantissa.  It does not support any exceptions.
1603           It is very simple, and approximately 3-6 times faster than NWFPE.
1604
1605           It should be sufficient for most programs.  It may be not suitable
1606           for scientific calculations, but you have to check this for yourself.
1607           If you do not feel you need a faster FP emulation you should better
1608           choose NWFPE.
1609
1610 config VFP
1611         bool "VFP-format floating point maths"
1612         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1613         help
1614           Say Y to include VFP support code in the kernel. This is needed
1615           if your hardware includes a VFP unit.
1616
1617           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1618           release notes and additional status information.
1619
1620           Say N if your target does not have VFP hardware.
1621
1622 config VFPv3
1623         bool
1624         depends on VFP
1625         default y if CPU_V7
1626
1627 config NEON
1628         bool "Advanced SIMD (NEON) Extension support"
1629         depends on VFPv3 && CPU_V7
1630         help
1631           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1632           Extension.
1633
1634 endmenu
1635
1636 menu "Userspace binary formats"
1637
1638 source "fs/Kconfig.binfmt"
1639
1640 config ARTHUR
1641         tristate "RISC OS personality"
1642         depends on !AEABI
1643         help
1644           Say Y here to include the kernel code necessary if you want to run
1645           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1646           experimental; if this sounds frightening, say N and sleep in peace.
1647           You can also say M here to compile this support as a module (which
1648           will be called arthur).
1649
1650 endmenu
1651
1652 menu "Power management options"
1653
1654 source "kernel/power/Kconfig"
1655
1656 config ARCH_SUSPEND_POSSIBLE
1657         def_bool y
1658
1659 endmenu
1660
1661 source "net/Kconfig"
1662
1663 source "drivers/Kconfig"
1664
1665 source "fs/Kconfig"
1666
1667 source "arch/arm/Kconfig.debug"
1668
1669 source "security/Kconfig"
1670
1671 source "crypto/Kconfig"
1672
1673 source "lib/Kconfig"