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, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
 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           Note, the S3C2416 and the S3C2450 are so close that they even share
 660           the same SoC ID code. This means that there is no seperate machine
 661           directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
 662
 663 config ARCH_S3C64XX
 664         bool "Samsung S3C64XX"
 665         select PLAT_SAMSUNG
 666         select CPU_V6
 667         select GENERIC_GPIO
 668         select ARM_VIC
 669         select HAVE_CLK
 670         select NO_IOPORT
 671         select ARCH_HAS_CPUFREQ
 672         select ARCH_REQUIRE_GPIOLIB
 673         select SAMSUNG_CLKSRC
 674         select SAMSUNG_IRQ_VIC_TIMER
 675         select SAMSUNG_IRQ_UART
 676         select S3C_GPIO_TRACK
 677         select S3C_GPIO_PULL_UPDOWN
 678         select S3C_GPIO_CFG_S3C24XX
 679         select S3C_GPIO_CFG_S3C64XX
 680         select S3C_DEV_NAND
 681         select USB_ARCH_HAS_OHCI
 682         select SAMSUNG_GPIOLIB_4BIT
 683         help
 684           Samsung S3C64XX series based systems
 685
 686 config ARCH_S5P6440
 687         bool "Samsung S5P6440"
 688         select CPU_V6
 689         select GENERIC_GPIO
 690         select HAVE_CLK
 691         help
 692           Samsung S5P6440 CPU based systems
 693
 694 config ARCH_S5P6442
 695         bool "Samsung S5P6442"
 696         select CPU_V6
 697         select GENERIC_GPIO
 698         select HAVE_CLK
 699         help
 700           Samsung S5P6442 CPU based systems
 701
 702 config ARCH_S5PC100
 703         bool "Samsung S5PC100"
 704         select GENERIC_GPIO
 705         select HAVE_CLK
 706         select CPU_V7
 707         select ARM_L1_CACHE_SHIFT_6
 708         help
 709           Samsung S5PC100 series based systems
 710
 711 config ARCH_S5PV210
 712         bool "Samsung S5PV210/S5PC110"
 713         select CPU_V7
 714         select GENERIC_GPIO
 715         select HAVE_CLK
 716         select ARM_L1_CACHE_SHIFT_6
 717         help
 718           Samsung S5PV210/S5PC110 series based systems
 719
 720 config ARCH_SHARK
 721         bool "Shark"
 722         select CPU_SA110
 723         select ISA
 724         select ISA_DMA
 725         select ZONE_DMA
 726         select PCI
 727         help
 728           Support for the StrongARM based Digital DNARD machine, also known
 729           as "Shark" (<http://www.shark-linux.de/shark.html>).
 730
 731 config ARCH_LH7A40X
 732         bool "Sharp LH7A40X"
 733         select CPU_ARM922T
 734         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 735         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 736         help
 737           Say Y here for systems based on one of the Sharp LH7A40X
 738           System on a Chip processors.  These CPUs include an ARM922T
 739           core with a wide array of integrated devices for
 740           hand-held and low-power applications.
 741
 742 config ARCH_U300
 743         bool "ST-Ericsson U300 Series"
 744         depends on MMU
 745         select CPU_ARM926T
 746         select HAVE_TCM
 747         select ARM_AMBA
 748         select ARM_VIC
 749         select GENERIC_TIME
 750         select GENERIC_CLOCKEVENTS
 751         select HAVE_CLK
 752         select COMMON_CLKDEV
 753         select GENERIC_GPIO
 754         help
 755           Support for ST-Ericsson U300 series mobile platforms.
 756
 757 config ARCH_U8500
 758         bool "ST-Ericsson U8500 Series"
 759         select CPU_V7
 760         select ARM_AMBA
 761         select GENERIC_TIME
 762         select GENERIC_CLOCKEVENTS
 763         select COMMON_CLKDEV
 764         help
 765           Support for ST-Ericsson's Ux500 architecture
 766
 767 config ARCH_NOMADIK
 768         bool "STMicroelectronics Nomadik"
 769         select ARM_AMBA
 770         select ARM_VIC
 771         select CPU_ARM926T
 772         select HAVE_CLK
 773         select COMMON_CLKDEV
 774         select GENERIC_TIME
 775         select GENERIC_CLOCKEVENTS
 776         select GENERIC_GPIO
 777         select ARCH_REQUIRE_GPIOLIB
 778         help
 779           Support for the Nomadik platform by ST-Ericsson
 780
 781 config ARCH_DAVINCI
 782         bool "TI DaVinci"
 783         select CPU_ARM926T
 784         select GENERIC_TIME
 785         select GENERIC_CLOCKEVENTS
 786         select GENERIC_GPIO
 787         select ARCH_REQUIRE_GPIOLIB
 788         select HAVE_CLK
 789         select ZONE_DMA
 790         select HAVE_IDE
 791         select COMMON_CLKDEV
 792         select GENERIC_ALLOCATOR
 793         select ARCH_HAS_HOLES_MEMORYMODEL
 794         help
 795           Support for TI's DaVinci platform.
 796
 797 config ARCH_OMAP
 798         bool "TI OMAP"
 799         select GENERIC_GPIO
 800         select HAVE_CLK
 801         select ARCH_REQUIRE_GPIOLIB
 802         select ARCH_HAS_CPUFREQ
 803         select GENERIC_TIME
 804         select GENERIC_CLOCKEVENTS
 805         select ARCH_HAS_HOLES_MEMORYMODEL
 806         help
 807           Support for TI's OMAP platform (OMAP1 and OMAP2).
 808
 809 endchoice
 810
 811 #
 812 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 813 # Kconfigs may be included either alphabetically (according to the
 814 # plat- suffix) or along side the corresponding mach-* source.
 815 #
 816 source "arch/arm/mach-aaec2000/Kconfig"
 817
 818 source "arch/arm/mach-at91/Kconfig"
 819
 820 source "arch/arm/mach-bcmring/Kconfig"
 821
 822 source "arch/arm/mach-clps711x/Kconfig"
 823
 824 source "arch/arm/mach-davinci/Kconfig"
 825
 826 source "arch/arm/mach-dove/Kconfig"
 827
 828 source "arch/arm/mach-ep93xx/Kconfig"
 829
 830 source "arch/arm/mach-footbridge/Kconfig"
 831
 832 source "arch/arm/mach-gemini/Kconfig"
 833
 834 source "arch/arm/mach-h720x/Kconfig"
 835
 836 source "arch/arm/mach-integrator/Kconfig"
 837
 838 source "arch/arm/mach-iop32x/Kconfig"
 839
 840 source "arch/arm/mach-iop33x/Kconfig"
 841
 842 source "arch/arm/mach-iop13xx/Kconfig"
 843
 844 source "arch/arm/mach-ixp4xx/Kconfig"
 845
 846 source "arch/arm/mach-ixp2000/Kconfig"
 847
 848 source "arch/arm/mach-ixp23xx/Kconfig"
 849
 850 source "arch/arm/mach-kirkwood/Kconfig"
 851
 852 source "arch/arm/mach-ks8695/Kconfig"
 853
 854 source "arch/arm/mach-lh7a40x/Kconfig"
 855
 856 source "arch/arm/mach-loki/Kconfig"
 857
 858 source "arch/arm/mach-msm/Kconfig"
 859
 860 source "arch/arm/mach-mv78xx0/Kconfig"
 861
 862 source "arch/arm/plat-mxc/Kconfig"
 863
 864 source "arch/arm/mach-netx/Kconfig"
 865
 866 source "arch/arm/mach-nomadik/Kconfig"
 867 source "arch/arm/plat-nomadik/Kconfig"
 868
 869 source "arch/arm/mach-ns9xxx/Kconfig"
 870
 871 source "arch/arm/mach-nuc93x/Kconfig"
 872
 873 source "arch/arm/plat-omap/Kconfig"
 874
 875 source "arch/arm/mach-omap1/Kconfig"
 876
 877 source "arch/arm/mach-omap2/Kconfig"
 878
 879 source "arch/arm/mach-orion5x/Kconfig"
 880
 881 source "arch/arm/mach-pxa/Kconfig"
 882 source "arch/arm/plat-pxa/Kconfig"
 883
 884 source "arch/arm/mach-mmp/Kconfig"
 885
 886 source "arch/arm/mach-realview/Kconfig"
 887
 888 source "arch/arm/mach-sa1100/Kconfig"
 889
 890 source "arch/arm/plat-samsung/Kconfig"
 891 source "arch/arm/plat-s3c24xx/Kconfig"
 892 source "arch/arm/plat-s5p/Kconfig"
 893
 894 if ARCH_S3C2410
 895 source "arch/arm/mach-s3c2400/Kconfig"
 896 source "arch/arm/mach-s3c2410/Kconfig"
 897 source "arch/arm/mach-s3c2412/Kconfig"
 898 source "arch/arm/mach-s3c2416/Kconfig"
 899 source "arch/arm/mach-s3c2440/Kconfig"
 900 source "arch/arm/mach-s3c2443/Kconfig"
 901 endif
 902
 903 if ARCH_S3C64XX
 904 source "arch/arm/mach-s3c64xx/Kconfig"
 905 endif
 906
 907 source "arch/arm/mach-s5p6440/Kconfig"
 908
 909 source "arch/arm/mach-s5p6442/Kconfig"
 910
 911 source "arch/arm/mach-s5pc100/Kconfig"
 912
 913 source "arch/arm/mach-s5pv210/Kconfig"
 914
 915 source "arch/arm/mach-shmobile/Kconfig"
 916
 917 source "arch/arm/plat-stmp3xxx/Kconfig"
 918
 919 source "arch/arm/mach-u300/Kconfig"
 920
 921 source "arch/arm/mach-ux500/Kconfig"
 922
 923 source "arch/arm/mach-versatile/Kconfig"
 924
 925 source "arch/arm/mach-w90x900/Kconfig"
 926
 927 # Definitions to make life easier
 928 config ARCH_ACORN
 929         bool
 930
 931 config PLAT_IOP
 932         bool
 933         select GENERIC_CLOCKEVENTS
 934         select GENERIC_TIME
 935
 936 config PLAT_ORION
 937         bool
 938
 939 config PLAT_PXA
 940         bool
 941
 942 source arch/arm/mm/Kconfig
 943
 944 config IWMMXT
 945         bool "Enable iWMMXt support"
 946         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 947         default y if PXA27x || PXA3xx || ARCH_MMP
 948         help
 949           Enable support for iWMMXt context switching at run time if
 950           running on a CPU that supports it.
 951
 952 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 953 config XSCALE_PMU
 954         bool
 955         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 956         default y
 957
 958 config CPU_HAS_PMU
 959         depends on CPU_V6 || CPU_V7 || XSCALE_PMU
 960         default y
 961         bool
 962
 963 if !MMU
 964 source "arch/arm/Kconfig-nommu"
 965 endif
 966
 967 config ARM_ERRATA_411920
 968         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 969         depends on CPU_V6 && !SMP
 970         help
 971           Invalidation of the Instruction Cache operation can
 972           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 973           It does not affect the MPCore. This option enables the ARM Ltd.
 974           recommended workaround.
 975
 976 config ARM_ERRATA_430973
 977         bool "ARM errata: Stale prediction on replaced interworking branch"
 978         depends on CPU_V7
 979         help
 980           This option enables the workaround for the 430973 Cortex-A8
 981           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 982           interworking branch is replaced with another code sequence at the
 983           same virtual address, whether due to self-modifying code or virtual
 984           to physical address re-mapping, Cortex-A8 does not recover from the
 985           stale interworking branch prediction. This results in Cortex-A8
 986           executing the new code sequence in the incorrect ARM or Thumb state.
 987           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 988           and also flushes the branch target cache at every context switch.
 989           Note that setting specific bits in the ACTLR register may not be
 990           available in non-secure mode.
 991
 992 config ARM_ERRATA_458693
 993         bool "ARM errata: Processor deadlock when a false hazard is created"
 994         depends on CPU_V7
 995         help
 996           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
 997           erratum. For very specific sequences of memory operations, it is
 998           possible for a hazard condition intended for a cache line to instead
 999           be incorrectly associated with a different cache line. This false
1000           hazard might then cause a processor deadlock. The workaround enables
1001           the L1 caching of the NEON accesses and disables the PLD instruction
1002           in the ACTLR register. Note that setting specific bits in the ACTLR
1003           register may not be available in non-secure mode.
1004
1005 config ARM_ERRATA_460075
1006         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1007         depends on CPU_V7
1008         help
1009           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1010           erratum. Any asynchronous access to the L2 cache may encounter a
1011           situation in which recent store transactions to the L2 cache are lost
1012           and overwritten with stale memory contents from external memory. The
1013           workaround disables the write-allocate mode for the L2 cache via the
1014           ACTLR register. Note that setting specific bits in the ACTLR register
1015           may not be available in non-secure mode.
1016
1017 config PL310_ERRATA_588369
1018         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1019         depends on CACHE_L2X0 && ARCH_OMAP4
1020         help
1021            The PL310 L2 cache controller implements three types of Clean &
1022            Invalidate maintenance operations: by Physical Address
1023            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1024            They are architecturally defined to behave as the execution of a
1025            clean operation followed immediately by an invalidate operation,
1026            both performing to the same memory location. This functionality
1027            is not correctly implemented in PL310 as clean lines are not
1028            invalidated as a result of these operations. Note that this errata
1029            uses Texas Instrument's secure monitor api.
1030 endmenu
1031
1032 source "arch/arm/common/Kconfig"
1033
1034 config FORCE_MAX_ZONEORDER
1035         int
1036         depends on SA1111
1037         default "9"
1038
1039 menu "Bus support"
1040
1041 config ARM_AMBA
1042         bool
1043
1044 config ISA
1045         bool
1046         help
1047           Find out whether you have ISA slots on your motherboard.  ISA is the
1048           name of a bus system, i.e. the way the CPU talks to the other stuff
1049           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1050           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1051           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1052
1053 # Select ISA DMA controller support
1054 config ISA_DMA
1055         bool
1056         select ISA_DMA_API
1057
1058 # Select ISA DMA interface
1059 config ISA_DMA_API
1060         bool
1061
1062 config PCI
1063         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1064         help
1065           Find out whether you have a PCI motherboard. PCI is the name of a
1066           bus system, i.e. the way the CPU talks to the other stuff inside
1067           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1068           VESA. If you have PCI, say Y, otherwise N.
1069
1070 config PCI_SYSCALL
1071         def_bool PCI
1072
1073 # Select the host bridge type
1074 config PCI_HOST_VIA82C505
1075         bool
1076         depends on PCI && ARCH_SHARK
1077         default y
1078
1079 config PCI_HOST_ITE8152
1080         bool
1081         depends on PCI && MACH_ARMCORE
1082         default y
1083         select DMABOUNCE
1084
1085 source "drivers/pci/Kconfig"
1086
1087 source "drivers/pcmcia/Kconfig"
1088
1089 endmenu
1090
1091 menu "Kernel Features"
1092
1093 source "kernel/time/Kconfig"
1094
1095 config SMP
1096         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1097         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1098                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1099         depends on GENERIC_CLOCKEVENTS
1100         select USE_GENERIC_SMP_HELPERS
1101         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1102         help
1103           This enables support for systems with more than one CPU. If you have
1104           a system with only one CPU, like most personal computers, say N. If
1105           you have a system with more than one CPU, say Y.
1106
1107           If you say N here, the kernel will run on single and multiprocessor
1108           machines, but will use only one CPU of a multiprocessor machine. If
1109           you say Y here, the kernel will run on many, but not all, single
1110           processor machines. On a single processor machine, the kernel will
1111           run faster if you say N here.
1112
1113           See also <file:Documentation/i386/IO-APIC.txt>,
1114           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1115           <http://www.linuxdoc.org/docs.html#howto>.
1116
1117           If you don't know what to do here, say N.
1118
1119 config HAVE_ARM_SCU
1120         bool
1121         depends on SMP
1122         help
1123           This option enables support for the ARM system coherency unit
1124
1125 config HAVE_ARM_TWD
1126         bool
1127         depends on SMP
1128         help
1129           This options enables support for the ARM timer and watchdog unit
1130
1131 choice
1132         prompt "Memory split"
1133         default VMSPLIT_3G
1134         help
1135           Select the desired split between kernel and user memory.
1136
1137           If you are not absolutely sure what you are doing, leave this
1138           option alone!
1139
1140         config VMSPLIT_3G
1141                 bool "3G/1G user/kernel split"
1142         config VMSPLIT_2G
1143                 bool "2G/2G user/kernel split"
1144         config VMSPLIT_1G
1145                 bool "1G/3G user/kernel split"
1146 endchoice
1147
1148 config PAGE_OFFSET
1149         hex
1150         default 0x40000000 if VMSPLIT_1G
1151         default 0x80000000 if VMSPLIT_2G
1152         default 0xC0000000
1153
1154 config NR_CPUS
1155         int "Maximum number of CPUs (2-32)"
1156         range 2 32
1157         depends on SMP
1158         default "4"
1159
1160 config HOTPLUG_CPU
1161         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1162         depends on SMP && HOTPLUG && EXPERIMENTAL
1163         help
1164           Say Y here to experiment with turning CPUs off and on.  CPUs
1165           can be controlled through /sys/devices/system/cpu.
1166
1167 config LOCAL_TIMERS
1168         bool "Use local timer interrupts"
1169         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1170                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1171         default y
1172         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1173         help
1174           Enable support for local timers on SMP platforms, rather then the
1175           legacy IPI broadcast method.  Local timers allows the system
1176           accounting to be spread across the timer interval, preventing a
1177           "thundering herd" at every timer tick.
1178
1179 source kernel/Kconfig.preempt
1180
1181 config HZ
1182         int
1183         default 128 if ARCH_L7200
1184         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
1185         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1186         default AT91_TIMER_HZ if ARCH_AT91
1187         default 100
1188
1189 config THUMB2_KERNEL
1190         bool "Compile the kernel in Thumb-2 mode"
1191         depends on CPU_V7 && EXPERIMENTAL
1192         select AEABI
1193         select ARM_ASM_UNIFIED
1194         help
1195           By enabling this option, the kernel will be compiled in
1196           Thumb-2 mode. A compiler/assembler that understand the unified
1197           ARM-Thumb syntax is needed.
1198
1199           If unsure, say N.
1200
1201 config ARM_ASM_UNIFIED
1202         bool
1203
1204 config AEABI
1205         bool "Use the ARM EABI to compile the kernel"
1206         help
1207           This option allows for the kernel to be compiled using the latest
1208           ARM ABI (aka EABI).  This is only useful if you are using a user
1209           space environment that is also compiled with EABI.
1210
1211           Since there are major incompatibilities between the legacy ABI and
1212           EABI, especially with regard to structure member alignment, this
1213           option also changes the kernel syscall calling convention to
1214           disambiguate both ABIs and allow for backward compatibility support
1215           (selected with CONFIG_OABI_COMPAT).
1216
1217           To use this you need GCC version 4.0.0 or later.
1218
1219 config OABI_COMPAT
1220         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1221         depends on AEABI && EXPERIMENTAL
1222         default y
1223         help
1224           This option preserves the old syscall interface along with the
1225           new (ARM EABI) one. It also provides a compatibility layer to
1226           intercept syscalls that have structure arguments which layout
1227           in memory differs between the legacy ABI and the new ARM EABI
1228           (only for non "thumb" binaries). This option adds a tiny
1229           overhead to all syscalls and produces a slightly larger kernel.
1230           If you know you'll be using only pure EABI user space then you
1231           can say N here. If this option is not selected and you attempt
1232           to execute a legacy ABI binary then the result will be
1233           UNPREDICTABLE (in fact it can be predicted that it won't work
1234           at all). If in doubt say Y.
1235
1236 config ARCH_HAS_HOLES_MEMORYMODEL
1237         bool
1238
1239 # Discontigmem is deprecated
1240 config ARCH_DISCONTIGMEM_ENABLE
1241         bool
1242
1243 config ARCH_SPARSEMEM_ENABLE
1244         bool
1245
1246 config ARCH_SPARSEMEM_DEFAULT
1247         def_bool ARCH_SPARSEMEM_ENABLE
1248
1249 config ARCH_SELECT_MEMORY_MODEL
1250         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1251
1252 config NODES_SHIFT
1253         int
1254         default "4" if ARCH_LH7A40X
1255         default "2"
1256         depends on NEED_MULTIPLE_NODES
1257
1258 config HIGHMEM
1259         bool "High Memory Support (EXPERIMENTAL)"
1260         depends on MMU && EXPERIMENTAL
1261         help
1262           The address space of ARM processors is only 4 Gigabytes large
1263           and it has to accommodate user address space, kernel address
1264           space as well as some memory mapped IO. That means that, if you
1265           have a large amount of physical memory and/or IO, not all of the
1266           memory can be "permanently mapped" by the kernel. The physical
1267           memory that is not permanently mapped is called "high memory".
1268
1269           Depending on the selected kernel/user memory split, minimum
1270           vmalloc space and actual amount of RAM, you may not need this
1271           option which should result in a slightly faster kernel.
1272
1273           If unsure, say n.
1274
1275 config HIGHPTE
1276         bool "Allocate 2nd-level pagetables from highmem"
1277         depends on HIGHMEM
1278         depends on !OUTER_CACHE
1279
1280 config HW_PERF_EVENTS
1281         bool "Enable hardware performance counter support for perf events"
1282         depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
1283         default y
1284         help
1285           Enable hardware performance counter support for perf events. If
1286           disabled, perf events will use software events only.
1287
1288 source "mm/Kconfig"
1289
1290 config LEDS
1291         bool "Timer and CPU usage LEDs"
1292         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1293                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1294                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1295                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1296                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1297                    ARCH_AT91 || ARCH_DAVINCI || \
1298                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1299         help
1300           If you say Y here, the LEDs on your machine will be used
1301           to provide useful information about your current system status.
1302
1303           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1304           be able to select which LEDs are active using the options below. If
1305           you are compiling a kernel for the EBSA-110 or the LART however, the
1306           red LED will simply flash regularly to indicate that the system is
1307           still functional. It is safe to say Y here if you have a CATS
1308           system, but the driver will do nothing.
1309
1310 config LEDS_TIMER
1311         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1312                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1313                             || MACH_OMAP_PERSEUS2
1314         depends on LEDS
1315         depends on !GENERIC_CLOCKEVENTS
1316         default y if ARCH_EBSA110
1317         help
1318           If you say Y here, one of the system LEDs (the green one on the
1319           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1320           will flash regularly to indicate that the system is still
1321           operational. This is mainly useful to kernel hackers who are
1322           debugging unstable kernels.
1323
1324           The LART uses the same LED for both Timer LED and CPU usage LED
1325           functions. You may choose to use both, but the Timer LED function
1326           will overrule the CPU usage LED.
1327
1328 config LEDS_CPU
1329         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1330                         !ARCH_OMAP) \
1331                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1332                         || MACH_OMAP_PERSEUS2
1333         depends on LEDS
1334         help
1335           If you say Y here, the red LED will be used to give a good real
1336           time indication of CPU usage, by lighting whenever the idle task
1337           is not currently executing.
1338
1339           The LART uses the same LED for both Timer LED and CPU usage LED
1340           functions. You may choose to use both, but the Timer LED function
1341           will overrule the CPU usage LED.
1342
1343 config ALIGNMENT_TRAP
1344         bool
1345         depends on CPU_CP15_MMU
1346         default y if !ARCH_EBSA110
1347         select HAVE_PROC_CPU if PROC_FS
1348         help
1349           ARM processors cannot fetch/store information which is not
1350           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1351           address divisible by 4. On 32-bit ARM processors, these non-aligned
1352           fetch/store instructions will be emulated in software if you say
1353           here, which has a severe performance impact. This is necessary for
1354           correct operation of some network protocols. With an IP-only
1355           configuration it is safe to say N, otherwise say Y.
1356
1357 config UACCESS_WITH_MEMCPY
1358         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1359         depends on MMU && EXPERIMENTAL
1360         default y if CPU_FEROCEON
1361         help
1362           Implement faster copy_to_user and clear_user methods for CPU
1363           cores where a 8-word STM instruction give significantly higher
1364           memory write throughput than a sequence of individual 32bit stores.
1365
1366           A possible side effect is a slight increase in scheduling latency
1367           between threads sharing the same address space if they invoke
1368           such copy operations with large buffers.
1369
1370           However, if the CPU data cache is using a write-allocate mode,
1371           this option is unlikely to provide any performance gain.
1372
1373 endmenu
1374
1375 menu "Boot options"
1376
1377 # Compressed boot loader in ROM.  Yes, we really want to ask about
1378 # TEXT and BSS so we preserve their values in the config files.
1379 config ZBOOT_ROM_TEXT
1380         hex "Compressed ROM boot loader base address"
1381         default "0"
1382         help
1383           The physical address at which the ROM-able zImage is to be
1384           placed in the target.  Platforms which normally make use of
1385           ROM-able zImage formats normally set this to a suitable
1386           value in their defconfig file.
1387
1388           If ZBOOT_ROM is not enabled, this has no effect.
1389
1390 config ZBOOT_ROM_BSS
1391         hex "Compressed ROM boot loader BSS address"
1392         default "0"
1393         help
1394           The base address of an area of read/write memory in the target
1395           for the ROM-able zImage which must be available while the
1396           decompressor is running. It must be large enough to hold the
1397           entire decompressed kernel plus an additional 128 KiB.
1398           Platforms which normally make use of ROM-able zImage formats
1399           normally set this to a suitable value in their defconfig file.
1400
1401           If ZBOOT_ROM is not enabled, this has no effect.
1402
1403 config ZBOOT_ROM
1404         bool "Compressed boot loader in ROM/flash"
1405         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1406         help
1407           Say Y here if you intend to execute your compressed kernel image
1408           (zImage) directly from ROM or flash.  If unsure, say N.
1409
1410 config CMDLINE
1411         string "Default kernel command string"
1412         default ""
1413         help
1414           On some architectures (EBSA110 and CATS), there is currently no way
1415           for the boot loader to pass arguments to the kernel. For these
1416           architectures, you should supply some command-line options at build
1417           time by entering them here. As a minimum, you should specify the
1418           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1419
1420 config XIP_KERNEL
1421         bool "Kernel Execute-In-Place from ROM"
1422         depends on !ZBOOT_ROM
1423         help
1424           Execute-In-Place allows the kernel to run from non-volatile storage
1425           directly addressable by the CPU, such as NOR flash. This saves RAM
1426           space since the text section of the kernel is not loaded from flash
1427           to RAM.  Read-write sections, such as the data section and stack,
1428           are still copied to RAM.  The XIP kernel is not compressed since
1429           it has to run directly from flash, so it will take more space to
1430           store it.  The flash address used to link the kernel object files,
1431           and for storing it, is configuration dependent. Therefore, if you
1432           say Y here, you must know the proper physical address where to
1433           store the kernel image depending on your own flash memory usage.
1434
1435           Also note that the make target becomes "make xipImage" rather than
1436           "make zImage" or "make Image".  The final kernel binary to put in
1437           ROM memory will be arch/arm/boot/xipImage.
1438
1439           If unsure, say N.
1440
1441 config XIP_PHYS_ADDR
1442         hex "XIP Kernel Physical Location"
1443         depends on XIP_KERNEL
1444         default "0x00080000"
1445         help
1446           This is the physical address in your flash memory the kernel will
1447           be linked for and stored to.  This address is dependent on your
1448           own flash usage.
1449
1450 config KEXEC
1451         bool "Kexec system call (EXPERIMENTAL)"
1452         depends on EXPERIMENTAL
1453         help
1454           kexec is a system call that implements the ability to shutdown your
1455           current kernel, and to start another kernel.  It is like a reboot
1456           but it is independent of the system firmware.   And like a reboot
1457           you can start any kernel with it, not just Linux.
1458
1459           It is an ongoing process to be certain the hardware in a machine
1460           is properly shutdown, so do not be surprised if this code does not
1461           initially work for you.  It may help to enable device hotplugging
1462           support.
1463
1464 config ATAGS_PROC
1465         bool "Export atags in procfs"
1466         depends on KEXEC
1467         default y
1468         help
1469           Should the atags used to boot the kernel be exported in an "atags"
1470           file in procfs. Useful with kexec.
1471
1472 endmenu
1473
1474 menu "CPU Power Management"
1475
1476 if ARCH_HAS_CPUFREQ
1477
1478 source "drivers/cpufreq/Kconfig"
1479
1480 config CPU_FREQ_SA1100
1481         bool
1482
1483 config CPU_FREQ_SA1110
1484         bool
1485
1486 config CPU_FREQ_INTEGRATOR
1487         tristate "CPUfreq driver for ARM Integrator CPUs"
1488         depends on ARCH_INTEGRATOR && CPU_FREQ
1489         default y
1490         help
1491           This enables the CPUfreq driver for ARM Integrator CPUs.
1492
1493           For details, take a look at <file:Documentation/cpu-freq>.
1494
1495           If in doubt, say Y.
1496
1497 config CPU_FREQ_PXA
1498         bool
1499         depends on CPU_FREQ && ARCH_PXA && PXA25x
1500         default y
1501         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1502
1503 config CPU_FREQ_S3C64XX
1504         bool "CPUfreq support for Samsung S3C64XX CPUs"
1505         depends on CPU_FREQ && CPU_S3C6410
1506
1507 config CPU_FREQ_S3C
1508         bool
1509         help
1510           Internal configuration node for common cpufreq on Samsung SoC
1511
1512 config CPU_FREQ_S3C24XX
1513         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1514         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1515         select CPU_FREQ_S3C
1516         help
1517           This enables the CPUfreq driver for the Samsung S3C24XX family
1518           of CPUs.
1519
1520           For details, take a look at <file:Documentation/cpu-freq>.
1521
1522           If in doubt, say N.
1523
1524 config CPU_FREQ_S3C24XX_PLL
1525         bool "Support CPUfreq changing of PLL frequency"
1526         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1527         help
1528           Compile in support for changing the PLL frequency from the
1529           S3C24XX series CPUfreq driver. The PLL takes time to settle
1530           after a frequency change, so by default it is not enabled.
1531
1532           This also means that the PLL tables for the selected CPU(s) will
1533           be built which may increase the size of the kernel image.
1534
1535 config CPU_FREQ_S3C24XX_DEBUG
1536         bool "Debug CPUfreq Samsung driver core"
1537         depends on CPU_FREQ_S3C24XX
1538         help
1539           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1540
1541 config CPU_FREQ_S3C24XX_IODEBUG
1542         bool "Debug CPUfreq Samsung driver IO timing"
1543         depends on CPU_FREQ_S3C24XX
1544         help
1545           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1546
1547 config CPU_FREQ_S3C24XX_DEBUGFS
1548         bool "Export debugfs for CPUFreq"
1549         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1550         help
1551           Export status information via debugfs.
1552
1553 endif
1554
1555 source "drivers/cpuidle/Kconfig"
1556
1557 endmenu
1558
1559 menu "Floating point emulation"
1560
1561 comment "At least one emulation must be selected"
1562
1563 config FPE_NWFPE
1564         bool "NWFPE math emulation"
1565         depends on !AEABI || OABI_COMPAT
1566         ---help---
1567           Say Y to include the NWFPE floating point emulator in the kernel.
1568           This is necessary to run most binaries. Linux does not currently
1569           support floating point hardware so you need to say Y here even if
1570           your machine has an FPA or floating point co-processor podule.
1571
1572           You may say N here if you are going to load the Acorn FPEmulator
1573           early in the bootup.
1574
1575 config FPE_NWFPE_XP
1576         bool "Support extended precision"
1577         depends on FPE_NWFPE
1578         help
1579           Say Y to include 80-bit support in the kernel floating-point
1580           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1581           Note that gcc does not generate 80-bit operations by default,
1582           so in most cases this option only enlarges the size of the
1583           floating point emulator without any good reason.
1584
1585           You almost surely want to say N here.
1586
1587 config FPE_FASTFPE
1588         bool "FastFPE math emulation (EXPERIMENTAL)"
1589         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1590         ---help---
1591           Say Y here to include the FAST floating point emulator in the kernel.
1592           This is an experimental much faster emulator which now also has full
1593           precision for the mantissa.  It does not support any exceptions.
1594           It is very simple, and approximately 3-6 times faster than NWFPE.
1595
1596           It should be sufficient for most programs.  It may be not suitable
1597           for scientific calculations, but you have to check this for yourself.
1598           If you do not feel you need a faster FP emulation you should better
1599           choose NWFPE.
1600
1601 config VFP
1602         bool "VFP-format floating point maths"
1603         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1604         help
1605           Say Y to include VFP support code in the kernel. This is needed
1606           if your hardware includes a VFP unit.
1607
1608           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1609           release notes and additional status information.
1610
1611           Say N if your target does not have VFP hardware.
1612
1613 config VFPv3
1614         bool
1615         depends on VFP
1616         default y if CPU_V7
1617
1618 config NEON
1619         bool "Advanced SIMD (NEON) Extension support"
1620         depends on VFPv3 && CPU_V7
1621         help
1622           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1623           Extension.
1624
1625 endmenu
1626
1627 menu "Userspace binary formats"
1628
1629 source "fs/Kconfig.binfmt"
1630
1631 config ARTHUR
1632         tristate "RISC OS personality"
1633         depends on !AEABI
1634         help
1635           Say Y here to include the kernel code necessary if you want to run
1636           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1637           experimental; if this sounds frightening, say N and sleep in peace.
1638           You can also say M here to compile this support as a module (which
1639           will be called arthur).
1640
1641 endmenu
1642
1643 menu "Power management options"
1644
1645 source "kernel/power/Kconfig"
1646
1647 config ARCH_SUSPEND_POSSIBLE
1648         def_bool y
1649
1650 endmenu
1651
1652 source "net/Kconfig"
1653
1654 source "drivers/Kconfig"
1655
1656 source "fs/Kconfig"
1657
1658 source "arch/arm/Kconfig.debug"
1659
1660 source "security/Kconfig"
1661
1662 source "crypto/Kconfig"
1663
1664 source "lib/Kconfig"