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_GEMINI
 301         bool "Cortina Systems Gemini"
 302         select CPU_FA526
 303         select GENERIC_GPIO
 304         select ARCH_REQUIRE_GPIOLIB
 305         help
 306           Support for the Cortina Systems Gemini family SoCs
 307
 308 config ARCH_EBSA110
 309         bool "EBSA-110"
 310         select CPU_SA110
 311         select ISA
 312         select NO_IOPORT
 313         help
 314           This is an evaluation board for the StrongARM processor available
 315           from Digital. It has limited hardware on-board, including an
 316           Ethernet interface, two PCMCIA sockets, two serial ports and a
 317           parallel port.
 318
 319 config ARCH_EP93XX
 320         bool "EP93xx-based"
 321         select CPU_ARM920T
 322         select ARM_AMBA
 323         select ARM_VIC
 324         select GENERIC_GPIO
 325         select HAVE_CLK
 326         select COMMON_CLKDEV
 327         select ARCH_REQUIRE_GPIOLIB
 328         select ARCH_HAS_HOLES_MEMORYMODEL
 329         help
 330           This enables support for the Cirrus EP93xx series of CPUs.
 331
 332 config ARCH_FOOTBRIDGE
 333         bool "FootBridge"
 334         select CPU_SA110
 335         select FOOTBRIDGE
 336         help
 337           Support for systems based on the DC21285 companion chip
 338           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 339
 340 config ARCH_MXC
 341         bool "Freescale MXC/iMX-based"
 342         select GENERIC_TIME
 343         select GENERIC_CLOCKEVENTS
 344         select ARCH_REQUIRE_GPIOLIB
 345         select HAVE_CLK
 346         select COMMON_CLKDEV
 347         help
 348           Support for Freescale MXC/iMX-based family of processors
 349
 350 config ARCH_STMP3XXX
 351         bool "Freescale STMP3xxx"
 352         select CPU_ARM926T
 353         select HAVE_CLK
 354         select COMMON_CLKDEV
 355         select ARCH_REQUIRE_GPIOLIB
 356         select GENERIC_TIME
 357         select GENERIC_CLOCKEVENTS
 358         select GENERIC_GPIO
 359         select USB_ARCH_HAS_EHCI
 360         help
 361           Support for systems based on the Freescale 3xxx CPUs.
 362
 363 config ARCH_NETX
 364         bool "Hilscher NetX based"
 365         select CPU_ARM926T
 366         select ARM_VIC
 367         select GENERIC_CLOCKEVENTS
 368         select GENERIC_TIME
 369         help
 370           This enables support for systems based on the Hilscher NetX Soc
 371
 372 config ARCH_H720X
 373         bool "Hynix HMS720x-based"
 374         select CPU_ARM720T
 375         select ISA_DMA_API
 376         help
 377           This enables support for systems based on the Hynix HMS720x
 378
 379 config ARCH_IOP13XX
 380         bool "IOP13xx-based"
 381         depends on MMU
 382         select CPU_XSC3
 383         select PLAT_IOP
 384         select PCI
 385         select ARCH_SUPPORTS_MSI
 386         select VMSPLIT_1G
 387         help
 388           Support for Intel's IOP13XX (XScale) family of processors.
 389
 390 config ARCH_IOP32X
 391         bool "IOP32x-based"
 392         depends on MMU
 393         select CPU_XSCALE
 394         select PLAT_IOP
 395         select PCI
 396         select GENERIC_GPIO
 397         select ARCH_REQUIRE_GPIOLIB
 398         help
 399           Support for Intel's 80219 and IOP32X (XScale) family of
 400           processors.
 401
 402 config ARCH_IOP33X
 403         bool "IOP33x-based"
 404         depends on MMU
 405         select CPU_XSCALE
 406         select PLAT_IOP
 407         select PCI
 408         select GENERIC_GPIO
 409         select ARCH_REQUIRE_GPIOLIB
 410         help
 411           Support for Intel's IOP33X (XScale) family of processors.
 412
 413 config ARCH_IXP23XX
 414         bool "IXP23XX-based"
 415         depends on MMU
 416         select CPU_XSC3
 417         select PCI
 418         help
 419           Support for Intel's IXP23xx (XScale) family of processors.
 420
 421 config ARCH_IXP2000
 422         bool "IXP2400/2800-based"
 423         depends on MMU
 424         select CPU_XSCALE
 425         select PCI
 426         help
 427           Support for Intel's IXP2400/2800 (XScale) family of processors.
 428
 429 config ARCH_IXP4XX
 430         bool "IXP4xx-based"
 431         depends on MMU
 432         select CPU_XSCALE
 433         select GENERIC_GPIO
 434         select GENERIC_TIME
 435         select GENERIC_CLOCKEVENTS
 436         select DMABOUNCE if PCI
 437         help
 438           Support for Intel's IXP4XX (XScale) family of processors.
 439
 440 config ARCH_L7200
 441         bool "LinkUp-L7200"
 442         select CPU_ARM720T
 443         select FIQ
 444         help
 445           Say Y here if you intend to run this kernel on a LinkUp Systems
 446           L7200 Software Development Board which uses an ARM720T processor.
 447           Information on this board can be obtained at:
 448
 449           <http://www.linkupsys.com/>
 450
 451           If you have any questions or comments about the Linux kernel port
 452           to this board, send e-mail to <sjhill@cotw.com>.
 453
 454 config ARCH_DOVE
 455         bool "Marvell Dove"
 456         select PCI
 457         select GENERIC_GPIO
 458         select ARCH_REQUIRE_GPIOLIB
 459         select GENERIC_TIME
 460         select GENERIC_CLOCKEVENTS
 461         select PLAT_ORION
 462         help
 463           Support for the Marvell Dove SoC 88AP510
 464
 465 config ARCH_KIRKWOOD
 466         bool "Marvell Kirkwood"
 467         select CPU_FEROCEON
 468         select PCI
 469         select GENERIC_GPIO
 470         select ARCH_REQUIRE_GPIOLIB
 471         select GENERIC_TIME
 472         select GENERIC_CLOCKEVENTS
 473         select PLAT_ORION
 474         help
 475           Support for the following Marvell Kirkwood series SoCs:
 476           88F6180, 88F6192 and 88F6281.
 477
 478 config ARCH_LOKI
 479         bool "Marvell Loki (88RC8480)"
 480         select CPU_FEROCEON
 481         select GENERIC_TIME
 482         select GENERIC_CLOCKEVENTS
 483         select PLAT_ORION
 484         help
 485           Support for the Marvell Loki (88RC8480) SoC.
 486
 487 config ARCH_MV78XX0
 488         bool "Marvell MV78xx0"
 489         select CPU_FEROCEON
 490         select PCI
 491         select GENERIC_GPIO
 492         select ARCH_REQUIRE_GPIOLIB
 493         select GENERIC_TIME
 494         select GENERIC_CLOCKEVENTS
 495         select PLAT_ORION
 496         help
 497           Support for the following Marvell MV78xx0 series SoCs:
 498           MV781x0, MV782x0.
 499
 500 config ARCH_ORION5X
 501         bool "Marvell Orion"
 502         depends on MMU
 503         select CPU_FEROCEON
 504         select PCI
 505         select GENERIC_GPIO
 506         select ARCH_REQUIRE_GPIOLIB
 507         select GENERIC_TIME
 508         select GENERIC_CLOCKEVENTS
 509         select PLAT_ORION
 510         help
 511           Support for the following Marvell Orion 5x series SoCs:
 512           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 513           Orion-2 (5281), Orion-1-90 (6183).
 514
 515 config ARCH_MMP
 516         bool "Marvell PXA168/910/MMP2"
 517         depends on MMU
 518         select GENERIC_GPIO
 519         select ARCH_REQUIRE_GPIOLIB
 520         select HAVE_CLK
 521         select COMMON_CLKDEV
 522         select GENERIC_TIME
 523         select GENERIC_CLOCKEVENTS
 524         select TICK_ONESHOT
 525         select PLAT_PXA
 526         help
 527           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 528
 529 config ARCH_KS8695
 530         bool "Micrel/Kendin KS8695"
 531         select CPU_ARM922T
 532         select GENERIC_GPIO
 533         select ARCH_REQUIRE_GPIOLIB
 534         help
 535           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 536           System-on-Chip devices.
 537
 538 config ARCH_NS9XXX
 539         bool "NetSilicon NS9xxx"
 540         select CPU_ARM926T
 541         select GENERIC_GPIO
 542         select GENERIC_TIME
 543         select GENERIC_CLOCKEVENTS
 544         select HAVE_CLK
 545         help
 546           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 547           System.
 548
 549           <http://www.digi.com/products/microprocessors/index.jsp>
 550
 551 config ARCH_W90X900
 552         bool "Nuvoton W90X900 CPU"
 553         select CPU_ARM926T
 554         select ARCH_REQUIRE_GPIOLIB
 555         select GENERIC_GPIO
 556         select HAVE_CLK
 557         select COMMON_CLKDEV
 558         select GENERIC_TIME
 559         select GENERIC_CLOCKEVENTS
 560         help
 561           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 562           At present, the w90x900 has been renamed nuc900, regarding
 563           the ARM series product line, you can login the following
 564           link address to know more.
 565
 566           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 567                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 568
 569 config ARCH_NUC93X
 570         bool "Nuvoton NUC93X CPU"
 571         select CPU_ARM926T
 572         select HAVE_CLK
 573         select COMMON_CLKDEV
 574         help
 575           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 576           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 577
 578 config ARCH_PNX4008
 579         bool "Philips Nexperia PNX4008 Mobile"
 580         select CPU_ARM926T
 581         select HAVE_CLK
 582         select COMMON_CLKDEV
 583         help
 584           This enables support for Philips PNX4008 mobile platform.
 585
 586 config ARCH_PXA
 587         bool "PXA2xx/PXA3xx-based"
 588         depends on MMU
 589         select ARCH_MTD_XIP
 590         select ARCH_HAS_CPUFREQ
 591         select GENERIC_GPIO
 592         select HAVE_CLK
 593         select COMMON_CLKDEV
 594         select ARCH_REQUIRE_GPIOLIB
 595         select GENERIC_TIME
 596         select GENERIC_CLOCKEVENTS
 597         select TICK_ONESHOT
 598         select PLAT_PXA
 599         help
 600           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 601
 602 config ARCH_MSM
 603         bool "Qualcomm MSM"
 604         select CPU_V6
 605         select GENERIC_TIME
 606         select GENERIC_CLOCKEVENTS
 607         help
 608           Support for Qualcomm MSM7K based systems.  This runs on the ARM11
 609           apps processor of the MSM7K and depends on a shared memory
 610           interface to the ARM9 modem processor which runs the baseband stack
 611           and controls some vital subsystems (clock and power control, etc).
 612
 613 config ARCH_SHMOBILE
 614         bool "Renesas SH-Mobile"
 615         help
 616           Support for Renesas's SH-Mobile ARM platforms
 617
 618 config ARCH_RPC
 619         bool "RiscPC"
 620         select ARCH_ACORN
 621         select FIQ
 622         select TIMER_ACORN
 623         select ARCH_MAY_HAVE_PC_FDC
 624         select HAVE_PATA_PLATFORM
 625         select ISA_DMA_API
 626         select NO_IOPORT
 627         select ARCH_SPARSEMEM_ENABLE
 628         help
 629           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 630           CD-ROM interface, serial and parallel port, and the floppy drive.
 631
 632 config ARCH_SA1100
 633         bool "SA1100-based"
 634         select CPU_SA1100
 635         select ISA
 636         select ARCH_SPARSEMEM_ENABLE
 637         select ARCH_MTD_XIP
 638         select ARCH_HAS_CPUFREQ
 639         select CPU_FREQ
 640         select GENERIC_GPIO
 641         select GENERIC_TIME
 642         select GENERIC_CLOCKEVENTS
 643         select HAVE_CLK
 644         select TICK_ONESHOT
 645         select ARCH_REQUIRE_GPIOLIB
 646         help
 647           Support for StrongARM 11x0 based boards.
 648
 649 config ARCH_S3C2410
 650         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
 651         select GENERIC_GPIO
 652         select ARCH_HAS_CPUFREQ
 653         select HAVE_CLK
 654         help
 655           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 656           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 657           the Samsung SMDK2410 development board (and derivatives).
 658
 659 config ARCH_S3C64XX
 660         bool "Samsung S3C64XX"
 661         select PLAT_SAMSUNG
 662         select CPU_V6
 663         select GENERIC_GPIO
 664         select ARM_VIC
 665         select HAVE_CLK
 666         select NO_IOPORT
 667         select ARCH_HAS_CPUFREQ
 668         select ARCH_REQUIRE_GPIOLIB
 669         select SAMSUNG_CLKSRC
 670         select SAMSUNG_IRQ_VIC_TIMER
 671         select SAMSUNG_IRQ_UART
 672         select S3C_GPIO_TRACK
 673         select S3C_GPIO_PULL_UPDOWN
 674         select S3C_GPIO_CFG_S3C24XX
 675         select S3C_GPIO_CFG_S3C64XX
 676         select S3C_DEV_NAND
 677         select USB_ARCH_HAS_OHCI
 678         select SAMSUNG_GPIOLIB_4BIT
 679         help
 680           Samsung S3C64XX series based systems
 681
 682 config ARCH_S5P6440
 683         bool "Samsung S5P6440"
 684         select CPU_V6
 685         select GENERIC_GPIO
 686         select HAVE_CLK
 687         help
 688           Samsung S5P6440 CPU based systems
 689
 690 config ARCH_S5P6442
 691         bool "Samsung S5P6442"
 692         select CPU_V6
 693         select GENERIC_GPIO
 694         select HAVE_CLK
 695         help
 696           Samsung S5P6442 CPU based systems
 697
 698 config ARCH_S5PC1XX
 699         bool "Samsung S5PC1XX"
 700         select GENERIC_GPIO
 701         select HAVE_CLK
 702         select CPU_V7
 703         select ARM_L1_CACHE_SHIFT_6
 704         help
 705           Samsung S5PC1XX series based systems
 706
 707 config ARCH_S5PV210
 708         bool "Samsung S5PV210/S5PC110"
 709         select CPU_V7
 710         select GENERIC_GPIO
 711         select HAVE_CLK
 712         select ARM_L1_CACHE_SHIFT_6
 713         help
 714           Samsung S5PV210/S5PC110 series based systems
 715
 716 config ARCH_SHARK
 717         bool "Shark"
 718         select CPU_SA110
 719         select ISA
 720         select ISA_DMA
 721         select ZONE_DMA
 722         select PCI
 723         help
 724           Support for the StrongARM based Digital DNARD machine, also known
 725           as "Shark" (<http://www.shark-linux.de/shark.html>).
 726
 727 config ARCH_LH7A40X
 728         bool "Sharp LH7A40X"
 729         select CPU_ARM922T
 730         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 731         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 732         help
 733           Say Y here for systems based on one of the Sharp LH7A40X
 734           System on a Chip processors.  These CPUs include an ARM922T
 735           core with a wide array of integrated devices for
 736           hand-held and low-power applications.
 737
 738 config ARCH_U300
 739         bool "ST-Ericsson U300 Series"
 740         depends on MMU
 741         select CPU_ARM926T
 742         select HAVE_TCM
 743         select ARM_AMBA
 744         select ARM_VIC
 745         select GENERIC_TIME
 746         select GENERIC_CLOCKEVENTS
 747         select HAVE_CLK
 748         select COMMON_CLKDEV
 749         select GENERIC_GPIO
 750         help
 751           Support for ST-Ericsson U300 series mobile platforms.
 752
 753 config ARCH_U8500
 754         bool "ST-Ericsson U8500 Series"
 755         select CPU_V7
 756         select ARM_AMBA
 757         select GENERIC_TIME
 758         select GENERIC_CLOCKEVENTS
 759         select COMMON_CLKDEV
 760         help
 761           Support for ST-Ericsson's Ux500 architecture
 762
 763 config ARCH_NOMADIK
 764         bool "STMicroelectronics Nomadik"
 765         select ARM_AMBA
 766         select ARM_VIC
 767         select CPU_ARM926T
 768         select HAVE_CLK
 769         select COMMON_CLKDEV
 770         select GENERIC_TIME
 771         select GENERIC_CLOCKEVENTS
 772         select GENERIC_GPIO
 773         select ARCH_REQUIRE_GPIOLIB
 774         help
 775           Support for the Nomadik platform by ST-Ericsson
 776
 777 config ARCH_DAVINCI
 778         bool "TI DaVinci"
 779         select CPU_ARM926T
 780         select GENERIC_TIME
 781         select GENERIC_CLOCKEVENTS
 782         select GENERIC_GPIO
 783         select ARCH_REQUIRE_GPIOLIB
 784         select HAVE_CLK
 785         select ZONE_DMA
 786         select HAVE_IDE
 787         select COMMON_CLKDEV
 788         select GENERIC_ALLOCATOR
 789         select ARCH_HAS_HOLES_MEMORYMODEL
 790         help
 791           Support for TI's DaVinci platform.
 792
 793 config ARCH_OMAP
 794         bool "TI OMAP"
 795         select GENERIC_GPIO
 796         select HAVE_CLK
 797         select ARCH_REQUIRE_GPIOLIB
 798         select ARCH_HAS_CPUFREQ
 799         select GENERIC_TIME
 800         select GENERIC_CLOCKEVENTS
 801         select ARCH_HAS_HOLES_MEMORYMODEL
 802         help
 803           Support for TI's OMAP platform (OMAP1 and OMAP2).
 804
 805 endchoice
 806
 807 #
 808 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 809 # Kconfigs may be included either alphabetically (according to the
 810 # plat- suffix) or along side the corresponding mach-* source.
 811 #
 812 source "arch/arm/mach-aaec2000/Kconfig"
 813
 814 source "arch/arm/mach-at91/Kconfig"
 815
 816 source "arch/arm/mach-bcmring/Kconfig"
 817
 818 source "arch/arm/mach-clps711x/Kconfig"
 819
 820 source "arch/arm/mach-davinci/Kconfig"
 821
 822 source "arch/arm/mach-dove/Kconfig"
 823
 824 source "arch/arm/mach-ep93xx/Kconfig"
 825
 826 source "arch/arm/mach-footbridge/Kconfig"
 827
 828 source "arch/arm/mach-gemini/Kconfig"
 829
 830 source "arch/arm/mach-h720x/Kconfig"
 831
 832 source "arch/arm/mach-integrator/Kconfig"
 833
 834 source "arch/arm/mach-iop32x/Kconfig"
 835
 836 source "arch/arm/mach-iop33x/Kconfig"
 837
 838 source "arch/arm/mach-iop13xx/Kconfig"
 839
 840 source "arch/arm/mach-ixp4xx/Kconfig"
 841
 842 source "arch/arm/mach-ixp2000/Kconfig"
 843
 844 source "arch/arm/mach-ixp23xx/Kconfig"
 845
 846 source "arch/arm/mach-kirkwood/Kconfig"
 847
 848 source "arch/arm/mach-ks8695/Kconfig"
 849
 850 source "arch/arm/mach-lh7a40x/Kconfig"
 851
 852 source "arch/arm/mach-loki/Kconfig"
 853
 854 source "arch/arm/mach-msm/Kconfig"
 855
 856 source "arch/arm/mach-mv78xx0/Kconfig"
 857
 858 source "arch/arm/plat-mxc/Kconfig"
 859
 860 source "arch/arm/mach-netx/Kconfig"
 861
 862 source "arch/arm/mach-nomadik/Kconfig"
 863 source "arch/arm/plat-nomadik/Kconfig"
 864
 865 source "arch/arm/mach-ns9xxx/Kconfig"
 866
 867 source "arch/arm/mach-nuc93x/Kconfig"
 868
 869 source "arch/arm/plat-omap/Kconfig"
 870
 871 source "arch/arm/mach-omap1/Kconfig"
 872
 873 source "arch/arm/mach-omap2/Kconfig"
 874
 875 source "arch/arm/mach-orion5x/Kconfig"
 876
 877 source "arch/arm/mach-pxa/Kconfig"
 878 source "arch/arm/plat-pxa/Kconfig"
 879
 880 source "arch/arm/mach-mmp/Kconfig"
 881
 882 source "arch/arm/mach-realview/Kconfig"
 883
 884 source "arch/arm/mach-sa1100/Kconfig"
 885
 886 source "arch/arm/plat-samsung/Kconfig"
 887 source "arch/arm/plat-s3c24xx/Kconfig"
 888 source "arch/arm/plat-s5p/Kconfig"
 889 source "arch/arm/plat-s5pc1xx/Kconfig"
 890
 891 if ARCH_S3C2410
 892 source "arch/arm/mach-s3c2400/Kconfig"
 893 source "arch/arm/mach-s3c2410/Kconfig"
 894 source "arch/arm/mach-s3c2412/Kconfig"
 895 source "arch/arm/mach-s3c2440/Kconfig"
 896 source "arch/arm/mach-s3c2443/Kconfig"
 897 endif
 898
 899 if ARCH_S3C64XX
 900 source "arch/arm/mach-s3c64xx/Kconfig"
 901 endif
 902
 903 source "arch/arm/mach-s5p6440/Kconfig"
 904
 905 source "arch/arm/mach-s5p6442/Kconfig"
 906
 907 if ARCH_S5PC1XX
 908 source "arch/arm/mach-s5pc100/Kconfig"
 909 endif
 910
 911 source "arch/arm/mach-s5pv210/Kconfig"
 912
 913 source "arch/arm/mach-shmobile/Kconfig"
 914
 915 source "arch/arm/plat-stmp3xxx/Kconfig"
 916
 917 source "arch/arm/mach-u300/Kconfig"
 918
 919 source "arch/arm/mach-ux500/Kconfig"
 920
 921 source "arch/arm/mach-versatile/Kconfig"
 922
 923 source "arch/arm/mach-w90x900/Kconfig"
 924
 925 # Definitions to make life easier
 926 config ARCH_ACORN
 927         bool
 928
 929 config PLAT_IOP
 930         bool
 931         select GENERIC_CLOCKEVENTS
 932         select GENERIC_TIME
 933
 934 config PLAT_ORION
 935         bool
 936
 937 config PLAT_PXA
 938         bool
 939
 940 source arch/arm/mm/Kconfig
 941
 942 config IWMMXT
 943         bool "Enable iWMMXt support"
 944         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 945         default y if PXA27x || PXA3xx || ARCH_MMP
 946         help
 947           Enable support for iWMMXt context switching at run time if
 948           running on a CPU that supports it.
 949
 950 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 951 config XSCALE_PMU
 952         bool
 953         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 954         default y
 955
 956 config CPU_HAS_PMU
 957         depends on CPU_V6 || CPU_V7 || XSCALE_PMU
 958         default y
 959         bool
 960
 961 if !MMU
 962 source "arch/arm/Kconfig-nommu"
 963 endif
 964
 965 config ARM_ERRATA_411920
 966         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 967         depends on CPU_V6 && !SMP
 968         help
 969           Invalidation of the Instruction Cache operation can
 970           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 971           It does not affect the MPCore. This option enables the ARM Ltd.
 972           recommended workaround.
 973
 974 config ARM_ERRATA_430973
 975         bool "ARM errata: Stale prediction on replaced interworking branch"
 976         depends on CPU_V7
 977         help
 978           This option enables the workaround for the 430973 Cortex-A8
 979           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 980           interworking branch is replaced with another code sequence at the
 981           same virtual address, whether due to self-modifying code or virtual
 982           to physical address re-mapping, Cortex-A8 does not recover from the
 983           stale interworking branch prediction. This results in Cortex-A8
 984           executing the new code sequence in the incorrect ARM or Thumb state.
 985           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 986           and also flushes the branch target cache at every context switch.
 987           Note that setting specific bits in the ACTLR register may not be
 988           available in non-secure mode.
 989
 990 config ARM_ERRATA_458693
 991         bool "ARM errata: Processor deadlock when a false hazard is created"
 992         depends on CPU_V7
 993         help
 994           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
 995           erratum. For very specific sequences of memory operations, it is
 996           possible for a hazard condition intended for a cache line to instead
 997           be incorrectly associated with a different cache line. This false
 998           hazard might then cause a processor deadlock. The workaround enables
 999           the L1 caching of the NEON accesses and disables the PLD instruction
1000           in the ACTLR register. Note that setting specific bits in the ACTLR
1001           register may not be available in non-secure mode.
1002
1003 config ARM_ERRATA_460075
1004         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1005         depends on CPU_V7
1006         help
1007           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1008           erratum. Any asynchronous access to the L2 cache may encounter a
1009           situation in which recent store transactions to the L2 cache are lost
1010           and overwritten with stale memory contents from external memory. The
1011           workaround disables the write-allocate mode for the L2 cache via the
1012           ACTLR register. Note that setting specific bits in the ACTLR register
1013           may not be available in non-secure mode.
1014
1015 config PL310_ERRATA_588369
1016         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1017         depends on CACHE_L2X0 && ARCH_OMAP4
1018         help
1019            The PL310 L2 cache controller implements three types of Clean &
1020            Invalidate maintenance operations: by Physical Address
1021            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1022            They are architecturally defined to behave as the execution of a
1023            clean operation followed immediately by an invalidate operation,
1024            both performing to the same memory location. This functionality
1025            is not correctly implemented in PL310 as clean lines are not
1026            invalidated as a result of these operations. Note that this errata
1027            uses Texas Instrument's secure monitor api.
1028 endmenu
1029
1030 source "arch/arm/common/Kconfig"
1031
1032 config FORCE_MAX_ZONEORDER
1033         int
1034         depends on SA1111
1035         default "9"
1036
1037 menu "Bus support"
1038
1039 config ARM_AMBA
1040         bool
1041
1042 config ISA
1043         bool
1044         help
1045           Find out whether you have ISA slots on your motherboard.  ISA is the
1046           name of a bus system, i.e. the way the CPU talks to the other stuff
1047           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1048           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1049           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1050
1051 # Select ISA DMA controller support
1052 config ISA_DMA
1053         bool
1054         select ISA_DMA_API
1055
1056 # Select ISA DMA interface
1057 config ISA_DMA_API
1058         bool
1059
1060 config PCI
1061         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1062         help
1063           Find out whether you have a PCI motherboard. PCI is the name of a
1064           bus system, i.e. the way the CPU talks to the other stuff inside
1065           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1066           VESA. If you have PCI, say Y, otherwise N.
1067
1068 config PCI_SYSCALL
1069         def_bool PCI
1070
1071 # Select the host bridge type
1072 config PCI_HOST_VIA82C505
1073         bool
1074         depends on PCI && ARCH_SHARK
1075         default y
1076
1077 config PCI_HOST_ITE8152
1078         bool
1079         depends on PCI && MACH_ARMCORE
1080         default y
1081         select DMABOUNCE
1082
1083 source "drivers/pci/Kconfig"
1084
1085 source "drivers/pcmcia/Kconfig"
1086
1087 endmenu
1088
1089 menu "Kernel Features"
1090
1091 source "kernel/time/Kconfig"
1092
1093 config SMP
1094         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1095         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1096                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1097         depends on GENERIC_CLOCKEVENTS
1098         select USE_GENERIC_SMP_HELPERS
1099         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1100         help
1101           This enables support for systems with more than one CPU. If you have
1102           a system with only one CPU, like most personal computers, say N. If
1103           you have a system with more than one CPU, say Y.
1104
1105           If you say N here, the kernel will run on single and multiprocessor
1106           machines, but will use only one CPU of a multiprocessor machine. If
1107           you say Y here, the kernel will run on many, but not all, single
1108           processor machines. On a single processor machine, the kernel will
1109           run faster if you say N here.
1110
1111           See also <file:Documentation/i386/IO-APIC.txt>,
1112           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1113           <http://www.linuxdoc.org/docs.html#howto>.
1114
1115           If you don't know what to do here, say N.
1116
1117 config HAVE_ARM_SCU
1118         bool
1119         depends on SMP
1120         help
1121           This option enables support for the ARM system coherency unit
1122
1123 config HAVE_ARM_TWD
1124         bool
1125         depends on SMP
1126         help
1127           This options enables support for the ARM timer and watchdog unit
1128
1129 choice
1130         prompt "Memory split"
1131         default VMSPLIT_3G
1132         help
1133           Select the desired split between kernel and user memory.
1134
1135           If you are not absolutely sure what you are doing, leave this
1136           option alone!
1137
1138         config VMSPLIT_3G
1139                 bool "3G/1G user/kernel split"
1140         config VMSPLIT_2G
1141                 bool "2G/2G user/kernel split"
1142         config VMSPLIT_1G
1143                 bool "1G/3G user/kernel split"
1144 endchoice
1145
1146 config PAGE_OFFSET
1147         hex
1148         default 0x40000000 if VMSPLIT_1G
1149         default 0x80000000 if VMSPLIT_2G
1150         default 0xC0000000
1151
1152 config NR_CPUS
1153         int "Maximum number of CPUs (2-32)"
1154         range 2 32
1155         depends on SMP
1156         default "4"
1157
1158 config HOTPLUG_CPU
1159         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1160         depends on SMP && HOTPLUG && EXPERIMENTAL
1161         help
1162           Say Y here to experiment with turning CPUs off and on.  CPUs
1163           can be controlled through /sys/devices/system/cpu.
1164
1165 config LOCAL_TIMERS
1166         bool "Use local timer interrupts"
1167         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1168                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1169         default y
1170         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1171         help
1172           Enable support for local timers on SMP platforms, rather then the
1173           legacy IPI broadcast method.  Local timers allows the system
1174           accounting to be spread across the timer interval, preventing a
1175           "thundering herd" at every timer tick.
1176
1177 source kernel/Kconfig.preempt
1178
1179 config HZ
1180         int
1181         default 128 if ARCH_L7200
1182         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
1183         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1184         default AT91_TIMER_HZ if ARCH_AT91
1185         default 100
1186
1187 config THUMB2_KERNEL
1188         bool "Compile the kernel in Thumb-2 mode"
1189         depends on CPU_V7 && EXPERIMENTAL
1190         select AEABI
1191         select ARM_ASM_UNIFIED
1192         help
1193           By enabling this option, the kernel will be compiled in
1194           Thumb-2 mode. A compiler/assembler that understand the unified
1195           ARM-Thumb syntax is needed.
1196
1197           If unsure, say N.
1198
1199 config ARM_ASM_UNIFIED
1200         bool
1201
1202 config AEABI
1203         bool "Use the ARM EABI to compile the kernel"
1204         help
1205           This option allows for the kernel to be compiled using the latest
1206           ARM ABI (aka EABI).  This is only useful if you are using a user
1207           space environment that is also compiled with EABI.
1208
1209           Since there are major incompatibilities between the legacy ABI and
1210           EABI, especially with regard to structure member alignment, this
1211           option also changes the kernel syscall calling convention to
1212           disambiguate both ABIs and allow for backward compatibility support
1213           (selected with CONFIG_OABI_COMPAT).
1214
1215           To use this you need GCC version 4.0.0 or later.
1216
1217 config OABI_COMPAT
1218         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1219         depends on AEABI && EXPERIMENTAL
1220         default y
1221         help
1222           This option preserves the old syscall interface along with the
1223           new (ARM EABI) one. It also provides a compatibility layer to
1224           intercept syscalls that have structure arguments which layout
1225           in memory differs between the legacy ABI and the new ARM EABI
1226           (only for non "thumb" binaries). This option adds a tiny
1227           overhead to all syscalls and produces a slightly larger kernel.
1228           If you know you'll be using only pure EABI user space then you
1229           can say N here. If this option is not selected and you attempt
1230           to execute a legacy ABI binary then the result will be
1231           UNPREDICTABLE (in fact it can be predicted that it won't work
1232           at all). If in doubt say Y.
1233
1234 config ARCH_HAS_HOLES_MEMORYMODEL
1235         bool
1236
1237 # Discontigmem is deprecated
1238 config ARCH_DISCONTIGMEM_ENABLE
1239         bool
1240
1241 config ARCH_SPARSEMEM_ENABLE
1242         bool
1243
1244 config ARCH_SPARSEMEM_DEFAULT
1245         def_bool ARCH_SPARSEMEM_ENABLE
1246
1247 config ARCH_SELECT_MEMORY_MODEL
1248         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1249
1250 config NODES_SHIFT
1251         int
1252         default "4" if ARCH_LH7A40X
1253         default "2"
1254         depends on NEED_MULTIPLE_NODES
1255
1256 config HIGHMEM
1257         bool "High Memory Support (EXPERIMENTAL)"
1258         depends on MMU && EXPERIMENTAL
1259         help
1260           The address space of ARM processors is only 4 Gigabytes large
1261           and it has to accommodate user address space, kernel address
1262           space as well as some memory mapped IO. That means that, if you
1263           have a large amount of physical memory and/or IO, not all of the
1264           memory can be "permanently mapped" by the kernel. The physical
1265           memory that is not permanently mapped is called "high memory".
1266
1267           Depending on the selected kernel/user memory split, minimum
1268           vmalloc space and actual amount of RAM, you may not need this
1269           option which should result in a slightly faster kernel.
1270
1271           If unsure, say n.
1272
1273 config HIGHPTE
1274         bool "Allocate 2nd-level pagetables from highmem"
1275         depends on HIGHMEM
1276         depends on !OUTER_CACHE
1277
1278 config HW_PERF_EVENTS
1279         bool "Enable hardware performance counter support for perf events"
1280         depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
1281         default y
1282         help
1283           Enable hardware performance counter support for perf events. If
1284           disabled, perf events will use software events only.
1285
1286 source "mm/Kconfig"
1287
1288 config LEDS
1289         bool "Timer and CPU usage LEDs"
1290         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1291                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1292                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1293                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1294                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1295                    ARCH_AT91 || ARCH_DAVINCI || \
1296                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1297         help
1298           If you say Y here, the LEDs on your machine will be used
1299           to provide useful information about your current system status.
1300
1301           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1302           be able to select which LEDs are active using the options below. If
1303           you are compiling a kernel for the EBSA-110 or the LART however, the
1304           red LED will simply flash regularly to indicate that the system is
1305           still functional. It is safe to say Y here if you have a CATS
1306           system, but the driver will do nothing.
1307
1308 config LEDS_TIMER
1309         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1310                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1311                             || MACH_OMAP_PERSEUS2
1312         depends on LEDS
1313         depends on !GENERIC_CLOCKEVENTS
1314         default y if ARCH_EBSA110
1315         help
1316           If you say Y here, one of the system LEDs (the green one on the
1317           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1318           will flash regularly to indicate that the system is still
1319           operational. This is mainly useful to kernel hackers who are
1320           debugging unstable kernels.
1321
1322           The LART uses the same LED for both Timer LED and CPU usage LED
1323           functions. You may choose to use both, but the Timer LED function
1324           will overrule the CPU usage LED.
1325
1326 config LEDS_CPU
1327         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1328                         !ARCH_OMAP) \
1329                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1330                         || MACH_OMAP_PERSEUS2
1331         depends on LEDS
1332         help
1333           If you say Y here, the red LED will be used to give a good real
1334           time indication of CPU usage, by lighting whenever the idle task
1335           is not currently executing.
1336
1337           The LART uses the same LED for both Timer LED and CPU usage LED
1338           functions. You may choose to use both, but the Timer LED function
1339           will overrule the CPU usage LED.
1340
1341 config ALIGNMENT_TRAP
1342         bool
1343         depends on CPU_CP15_MMU
1344         default y if !ARCH_EBSA110
1345         select HAVE_PROC_CPU if PROC_FS
1346         help
1347           ARM processors cannot fetch/store information which is not
1348           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1349           address divisible by 4. On 32-bit ARM processors, these non-aligned
1350           fetch/store instructions will be emulated in software if you say
1351           here, which has a severe performance impact. This is necessary for
1352           correct operation of some network protocols. With an IP-only
1353           configuration it is safe to say N, otherwise say Y.
1354
1355 config UACCESS_WITH_MEMCPY
1356         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1357         depends on MMU && EXPERIMENTAL
1358         default y if CPU_FEROCEON
1359         help
1360           Implement faster copy_to_user and clear_user methods for CPU
1361           cores where a 8-word STM instruction give significantly higher
1362           memory write throughput than a sequence of individual 32bit stores.
1363
1364           A possible side effect is a slight increase in scheduling latency
1365           between threads sharing the same address space if they invoke
1366           such copy operations with large buffers.
1367
1368           However, if the CPU data cache is using a write-allocate mode,
1369           this option is unlikely to provide any performance gain.
1370
1371 endmenu
1372
1373 menu "Boot options"
1374
1375 # Compressed boot loader in ROM.  Yes, we really want to ask about
1376 # TEXT and BSS so we preserve their values in the config files.
1377 config ZBOOT_ROM_TEXT
1378         hex "Compressed ROM boot loader base address"
1379         default "0"
1380         help
1381           The physical address at which the ROM-able zImage is to be
1382           placed in the target.  Platforms which normally make use of
1383           ROM-able zImage formats normally set this to a suitable
1384           value in their defconfig file.
1385
1386           If ZBOOT_ROM is not enabled, this has no effect.
1387
1388 config ZBOOT_ROM_BSS
1389         hex "Compressed ROM boot loader BSS address"
1390         default "0"
1391         help
1392           The base address of an area of read/write memory in the target
1393           for the ROM-able zImage which must be available while the
1394           decompressor is running. It must be large enough to hold the
1395           entire decompressed kernel plus an additional 128 KiB.
1396           Platforms which normally make use of ROM-able zImage formats
1397           normally set this to a suitable value in their defconfig file.
1398
1399           If ZBOOT_ROM is not enabled, this has no effect.
1400
1401 config ZBOOT_ROM
1402         bool "Compressed boot loader in ROM/flash"
1403         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1404         help
1405           Say Y here if you intend to execute your compressed kernel image
1406           (zImage) directly from ROM or flash.  If unsure, say N.
1407
1408 config CMDLINE
1409         string "Default kernel command string"
1410         default ""
1411         help
1412           On some architectures (EBSA110 and CATS), there is currently no way
1413           for the boot loader to pass arguments to the kernel. For these
1414           architectures, you should supply some command-line options at build
1415           time by entering them here. As a minimum, you should specify the
1416           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1417
1418 config XIP_KERNEL
1419         bool "Kernel Execute-In-Place from ROM"
1420         depends on !ZBOOT_ROM
1421         help
1422           Execute-In-Place allows the kernel to run from non-volatile storage
1423           directly addressable by the CPU, such as NOR flash. This saves RAM
1424           space since the text section of the kernel is not loaded from flash
1425           to RAM.  Read-write sections, such as the data section and stack,
1426           are still copied to RAM.  The XIP kernel is not compressed since
1427           it has to run directly from flash, so it will take more space to
1428           store it.  The flash address used to link the kernel object files,
1429           and for storing it, is configuration dependent. Therefore, if you
1430           say Y here, you must know the proper physical address where to
1431           store the kernel image depending on your own flash memory usage.
1432
1433           Also note that the make target becomes "make xipImage" rather than
1434           "make zImage" or "make Image".  The final kernel binary to put in
1435           ROM memory will be arch/arm/boot/xipImage.
1436
1437           If unsure, say N.
1438
1439 config XIP_PHYS_ADDR
1440         hex "XIP Kernel Physical Location"
1441         depends on XIP_KERNEL
1442         default "0x00080000"
1443         help
1444           This is the physical address in your flash memory the kernel will
1445           be linked for and stored to.  This address is dependent on your
1446           own flash usage.
1447
1448 config KEXEC
1449         bool "Kexec system call (EXPERIMENTAL)"
1450         depends on EXPERIMENTAL
1451         help
1452           kexec is a system call that implements the ability to shutdown your
1453           current kernel, and to start another kernel.  It is like a reboot
1454           but it is independent of the system firmware.   And like a reboot
1455           you can start any kernel with it, not just Linux.
1456
1457           It is an ongoing process to be certain the hardware in a machine
1458           is properly shutdown, so do not be surprised if this code does not
1459           initially work for you.  It may help to enable device hotplugging
1460           support.
1461
1462 config ATAGS_PROC
1463         bool "Export atags in procfs"
1464         depends on KEXEC
1465         default y
1466         help
1467           Should the atags used to boot the kernel be exported in an "atags"
1468           file in procfs. Useful with kexec.
1469
1470 endmenu
1471
1472 menu "CPU Power Management"
1473
1474 if ARCH_HAS_CPUFREQ
1475
1476 source "drivers/cpufreq/Kconfig"
1477
1478 config CPU_FREQ_SA1100
1479         bool
1480
1481 config CPU_FREQ_SA1110
1482         bool
1483
1484 config CPU_FREQ_INTEGRATOR
1485         tristate "CPUfreq driver for ARM Integrator CPUs"
1486         depends on ARCH_INTEGRATOR && CPU_FREQ
1487         default y
1488         help
1489           This enables the CPUfreq driver for ARM Integrator CPUs.
1490
1491           For details, take a look at <file:Documentation/cpu-freq>.
1492
1493           If in doubt, say Y.
1494
1495 config CPU_FREQ_PXA
1496         bool
1497         depends on CPU_FREQ && ARCH_PXA && PXA25x
1498         default y
1499         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1500
1501 config CPU_FREQ_S3C64XX
1502         bool "CPUfreq support for Samsung S3C64XX CPUs"
1503         depends on CPU_FREQ && CPU_S3C6410
1504
1505 config CPU_FREQ_S3C
1506         bool
1507         help
1508           Internal configuration node for common cpufreq on Samsung SoC
1509
1510 config CPU_FREQ_S3C24XX
1511         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1512         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1513         select CPU_FREQ_S3C
1514         help
1515           This enables the CPUfreq driver for the Samsung S3C24XX family
1516           of CPUs.
1517
1518           For details, take a look at <file:Documentation/cpu-freq>.
1519
1520           If in doubt, say N.
1521
1522 config CPU_FREQ_S3C24XX_PLL
1523         bool "Support CPUfreq changing of PLL frequency"
1524         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1525         help
1526           Compile in support for changing the PLL frequency from the
1527           S3C24XX series CPUfreq driver. The PLL takes time to settle
1528           after a frequency change, so by default it is not enabled.
1529
1530           This also means that the PLL tables for the selected CPU(s) will
1531           be built which may increase the size of the kernel image.
1532
1533 config CPU_FREQ_S3C24XX_DEBUG
1534         bool "Debug CPUfreq Samsung driver core"
1535         depends on CPU_FREQ_S3C24XX
1536         help
1537           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1538
1539 config CPU_FREQ_S3C24XX_IODEBUG
1540         bool "Debug CPUfreq Samsung driver IO timing"
1541         depends on CPU_FREQ_S3C24XX
1542         help
1543           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1544
1545 config CPU_FREQ_S3C24XX_DEBUGFS
1546         bool "Export debugfs for CPUFreq"
1547         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1548         help
1549           Export status information via debugfs.
1550
1551 endif
1552
1553 source "drivers/cpuidle/Kconfig"
1554
1555 endmenu
1556
1557 menu "Floating point emulation"
1558
1559 comment "At least one emulation must be selected"
1560
1561 config FPE_NWFPE
1562         bool "NWFPE math emulation"
1563         depends on !AEABI || OABI_COMPAT
1564         ---help---
1565           Say Y to include the NWFPE floating point emulator in the kernel.
1566           This is necessary to run most binaries. Linux does not currently
1567           support floating point hardware so you need to say Y here even if
1568           your machine has an FPA or floating point co-processor podule.
1569
1570           You may say N here if you are going to load the Acorn FPEmulator
1571           early in the bootup.
1572
1573 config FPE_NWFPE_XP
1574         bool "Support extended precision"
1575         depends on FPE_NWFPE
1576         help
1577           Say Y to include 80-bit support in the kernel floating-point
1578           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1579           Note that gcc does not generate 80-bit operations by default,
1580           so in most cases this option only enlarges the size of the
1581           floating point emulator without any good reason.
1582
1583           You almost surely want to say N here.
1584
1585 config FPE_FASTFPE
1586         bool "FastFPE math emulation (EXPERIMENTAL)"
1587         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1588         ---help---
1589           Say Y here to include the FAST floating point emulator in the kernel.
1590           This is an experimental much faster emulator which now also has full
1591           precision for the mantissa.  It does not support any exceptions.
1592           It is very simple, and approximately 3-6 times faster than NWFPE.
1593
1594           It should be sufficient for most programs.  It may be not suitable
1595           for scientific calculations, but you have to check this for yourself.
1596           If you do not feel you need a faster FP emulation you should better
1597           choose NWFPE.
1598
1599 config VFP
1600         bool "VFP-format floating point maths"
1601         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1602         help
1603           Say Y to include VFP support code in the kernel. This is needed
1604           if your hardware includes a VFP unit.
1605
1606           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1607           release notes and additional status information.
1608
1609           Say N if your target does not have VFP hardware.
1610
1611 config VFPv3
1612         bool
1613         depends on VFP
1614         default y if CPU_V7
1615
1616 config NEON
1617         bool "Advanced SIMD (NEON) Extension support"
1618         depends on VFPv3 && CPU_V7
1619         help
1620           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1621           Extension.
1622
1623 endmenu
1624
1625 menu "Userspace binary formats"
1626
1627 source "fs/Kconfig.binfmt"
1628
1629 config ARTHUR
1630         tristate "RISC OS personality"
1631         depends on !AEABI
1632         help
1633           Say Y here to include the kernel code necessary if you want to run
1634           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1635           experimental; if this sounds frightening, say N and sleep in peace.
1636           You can also say M here to compile this support as a module (which
1637           will be called arthur).
1638
1639 endmenu
1640
1641 menu "Power management options"
1642
1643 source "kernel/power/Kconfig"
1644
1645 config ARCH_SUSPEND_POSSIBLE
1646         def_bool y
1647
1648 endmenu
1649
1650 source "net/Kconfig"
1651
1652 source "drivers/Kconfig"
1653
1654 source "fs/Kconfig"
1655
1656 source "arch/arm/Kconfig.debug"
1657
1658 source "security/Kconfig"
1659
1660 source "crypto/Kconfig"
1661
1662 source "lib/Kconfig"