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 HAVE_MEMBLOCK
  14         select RTC_LIB
  15         select SYS_SUPPORTS_APM_EMULATION
  16         select GENERIC_ATOMIC64 if (!CPU_32v6K)
  17         select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  18         select HAVE_ARCH_KGDB
  19         select HAVE_KPROBES if (!XIP_KERNEL)
  20         select HAVE_KRETPROBES if (HAVE_KPROBES)
  21         select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  22         select HAVE_GENERIC_DMA_COHERENT
  23         select HAVE_KERNEL_GZIP
  24         select HAVE_KERNEL_LZO
  25         select HAVE_KERNEL_LZMA
  26         select HAVE_PERF_EVENTS
  27         select PERF_USE_VMALLOC
  28         select HAVE_REGS_AND_STACK_ACCESS_API
  29         help
  30           The ARM series is a line of low-power-consumption RISC chip designs
  31           licensed by ARM Ltd and targeted at embedded applications and
  32           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  33           manufactured, but legacy ARM-based PC hardware remains popular in
  34           Europe.  There is an ARM Linux project with a web page at
  35           <http://www.arm.linux.org.uk/>.
  36
  37 config HAVE_PWM
  38         bool
  39
  40 config SYS_SUPPORTS_APM_EMULATION
  41         bool
  42
  43 config GENERIC_GPIO
  44         bool
  45
  46 config ARCH_USES_GETTIMEOFFSET
  47         bool
  48         default n
  49
  50 config GENERIC_CLOCKEVENTS
  51         bool
  52
  53 config GENERIC_CLOCKEVENTS_BROADCAST
  54         bool
  55         depends on GENERIC_CLOCKEVENTS
  56         default y if SMP
  57
  58 config HAVE_TCM
  59         bool
  60         select GENERIC_ALLOCATOR
  61
  62 config HAVE_PROC_CPU
  63         bool
  64
  65 config NO_IOPORT
  66         bool
  67
  68 config EISA
  69         bool
  70         ---help---
  71           The Extended Industry Standard Architecture (EISA) bus was
  72           developed as an open alternative to the IBM MicroChannel bus.
  73
  74           The EISA bus provided some of the features of the IBM MicroChannel
  75           bus while maintaining backward compatibility with cards made for
  76           the older ISA bus.  The EISA bus saw limited use between 1988 and
  77           1995 when it was made obsolete by the PCI bus.
  78
  79           Say Y here if you are building a kernel for an EISA-based machine.
  80
  81           Otherwise, say N.
  82
  83 config SBUS
  84         bool
  85
  86 config MCA
  87         bool
  88         help
  89           MicroChannel Architecture is found in some IBM PS/2 machines and
  90           laptops.  It is a bus system similar to PCI or ISA. See
  91           <file:Documentation/mca.txt> (and especially the web page given
  92           there) before attempting to build an MCA bus kernel.
  93
  94 config GENERIC_HARDIRQS
  95         bool
  96         default y
  97
  98 config STACKTRACE_SUPPORT
  99         bool
 100         default y
 101
 102 config HAVE_LATENCYTOP_SUPPORT
 103         bool
 104         depends on !SMP
 105         default y
 106
 107 config LOCKDEP_SUPPORT
 108         bool
 109         default y
 110
 111 config TRACE_IRQFLAGS_SUPPORT
 112         bool
 113         default y
 114
 115 config HARDIRQS_SW_RESEND
 116         bool
 117         default y
 118
 119 config GENERIC_IRQ_PROBE
 120         bool
 121         default y
 122
 123 config GENERIC_LOCKBREAK
 124         bool
 125         default y
 126         depends on SMP && PREEMPT
 127
 128 config RWSEM_GENERIC_SPINLOCK
 129         bool
 130         default y
 131
 132 config RWSEM_XCHGADD_ALGORITHM
 133         bool
 134
 135 config ARCH_HAS_ILOG2_U32
 136         bool
 137
 138 config ARCH_HAS_ILOG2_U64
 139         bool
 140
 141 config ARCH_HAS_CPUFREQ
 142         bool
 143         help
 144           Internal node to signify that the ARCH has CPUFREQ support
 145           and that the relevant menu configurations are displayed for
 146           it.
 147
 148 config GENERIC_HWEIGHT
 149         bool
 150         default y
 151
 152 config GENERIC_CALIBRATE_DELAY
 153         bool
 154         default y
 155
 156 config ARCH_MAY_HAVE_PC_FDC
 157         bool
 158
 159 config ZONE_DMA
 160         bool
 161
 162 config NEED_DMA_MAP_STATE
 163        def_bool y
 164
 165 config GENERIC_ISA_DMA
 166         bool
 167
 168 config FIQ
 169         bool
 170
 171 config ARCH_MTD_XIP
 172         bool
 173
 174 config GENERIC_HARDIRQS_NO__DO_IRQ
 175         def_bool y
 176
 177 config ARM_L1_CACHE_SHIFT_6
 178         bool
 179         help
 180           Setting ARM L1 cache line size to 64 Bytes.
 181
 182 config VECTORS_BASE
 183         hex
 184         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 185         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 186         default 0x00000000
 187         help
 188           The base address of exception vectors.
 189
 190 source "init/Kconfig"
 191
 192 source "kernel/Kconfig.freezer"
 193
 194 menu "System Type"
 195
 196 config MMU
 197         bool "MMU-based Paged Memory Management Support"
 198         default y
 199         help
 200           Select if you want MMU-based virtualised addressing space
 201           support by paged memory management. If unsure, say 'Y'.
 202
 203 #
 204 # The "ARM system type" choice list is ordered alphabetically by option
 205 # text.  Please add new entries in the option alphabetic order.
 206 #
 207 choice
 208         prompt "ARM system type"
 209         default ARCH_VERSATILE
 210
 211 config ARCH_AAEC2000
 212         bool "Agilent AAEC-2000 based"
 213         select CPU_ARM920T
 214         select ARM_AMBA
 215         select HAVE_CLK
 216         select ARCH_USES_GETTIMEOFFSET
 217         help
 218           This enables support for systems based on the Agilent AAEC-2000
 219
 220 config ARCH_INTEGRATOR
 221         bool "ARM Ltd. Integrator family"
 222         select ARM_AMBA
 223         select ARCH_HAS_CPUFREQ
 224         select COMMON_CLKDEV
 225         select ICST
 226         select GENERIC_CLOCKEVENTS
 227         select PLAT_VERSATILE
 228         help
 229           Support for ARM's Integrator platform.
 230
 231 config ARCH_REALVIEW
 232         bool "ARM Ltd. RealView family"
 233         select ARM_AMBA
 234         select COMMON_CLKDEV
 235         select ICST
 236         select GENERIC_CLOCKEVENTS
 237         select ARCH_WANT_OPTIONAL_GPIOLIB
 238         select PLAT_VERSATILE
 239         select ARM_TIMER_SP804
 240         select GPIO_PL061 if GPIOLIB
 241         help
 242           This enables support for ARM Ltd RealView boards.
 243
 244 config ARCH_VERSATILE
 245         bool "ARM Ltd. Versatile family"
 246         select ARM_AMBA
 247         select ARM_VIC
 248         select COMMON_CLKDEV
 249         select ICST
 250         select GENERIC_CLOCKEVENTS
 251         select ARCH_WANT_OPTIONAL_GPIOLIB
 252         select PLAT_VERSATILE
 253         select ARM_TIMER_SP804
 254         help
 255           This enables support for ARM Ltd Versatile board.
 256
 257 config ARCH_VEXPRESS
 258         bool "ARM Ltd. Versatile Express family"
 259         select ARCH_WANT_OPTIONAL_GPIOLIB
 260         select ARM_AMBA
 261         select ARM_TIMER_SP804
 262         select COMMON_CLKDEV
 263         select GENERIC_CLOCKEVENTS
 264         select HAVE_CLK
 265         select ICST
 266         select PLAT_VERSATILE
 267         help
 268           This enables support for the ARM Ltd Versatile Express boards.
 269
 270 config ARCH_AT91
 271         bool "Atmel AT91"
 272         select ARCH_REQUIRE_GPIOLIB
 273         select HAVE_CLK
 274         select ARCH_USES_GETTIMEOFFSET
 275         help
 276           This enables support for systems based on the Atmel AT91RM9200,
 277           AT91SAM9 and AT91CAP9 processors.
 278
 279 config ARCH_BCMRING
 280         bool "Broadcom BCMRING"
 281         depends on MMU
 282         select CPU_V6
 283         select ARM_AMBA
 284         select COMMON_CLKDEV
 285         select GENERIC_CLOCKEVENTS
 286         select ARCH_WANT_OPTIONAL_GPIOLIB
 287         help
 288           Support for Broadcom's BCMRing platform.
 289
 290 config ARCH_CLPS711X
 291         bool "Cirrus Logic CLPS711x/EP721x-based"
 292         select CPU_ARM720T
 293         select ARCH_USES_GETTIMEOFFSET
 294         help
 295           Support for Cirrus Logic 711x/721x based boards.
 296
 297 config ARCH_CNS3XXX
 298         bool "Cavium Networks CNS3XXX family"
 299         select CPU_V6
 300         select GENERIC_CLOCKEVENTS
 301         select ARM_GIC
 302         select PCI_DOMAINS if PCI
 303         help
 304           Support for Cavium Networks CNS3XXX platform.
 305
 306 config ARCH_GEMINI
 307         bool "Cortina Systems Gemini"
 308         select CPU_FA526
 309         select ARCH_REQUIRE_GPIOLIB
 310         select ARCH_USES_GETTIMEOFFSET
 311         help
 312           Support for the Cortina Systems Gemini family SoCs
 313
 314 config ARCH_EBSA110
 315         bool "EBSA-110"
 316         select CPU_SA110
 317         select ISA
 318         select NO_IOPORT
 319         select ARCH_USES_GETTIMEOFFSET
 320         help
 321           This is an evaluation board for the StrongARM processor available
 322           from Digital. It has limited hardware on-board, including an
 323           Ethernet interface, two PCMCIA sockets, two serial ports and a
 324           parallel port.
 325
 326 config ARCH_EP93XX
 327         bool "EP93xx-based"
 328         select CPU_ARM920T
 329         select ARM_AMBA
 330         select ARM_VIC
 331         select COMMON_CLKDEV
 332         select ARCH_REQUIRE_GPIOLIB
 333         select ARCH_HAS_HOLES_MEMORYMODEL
 334         select ARCH_USES_GETTIMEOFFSET
 335         help
 336           This enables support for the Cirrus EP93xx series of CPUs.
 337
 338 config ARCH_FOOTBRIDGE
 339         bool "FootBridge"
 340         select CPU_SA110
 341         select FOOTBRIDGE
 342         select ARCH_USES_GETTIMEOFFSET
 343         help
 344           Support for systems based on the DC21285 companion chip
 345           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 346
 347 config ARCH_MXC
 348         bool "Freescale MXC/iMX-based"
 349         select GENERIC_CLOCKEVENTS
 350         select ARCH_REQUIRE_GPIOLIB
 351         select COMMON_CLKDEV
 352         help
 353           Support for Freescale MXC/iMX-based family of processors
 354
 355 config ARCH_STMP3XXX
 356         bool "Freescale STMP3xxx"
 357         select CPU_ARM926T
 358         select COMMON_CLKDEV
 359         select ARCH_REQUIRE_GPIOLIB
 360         select GENERIC_CLOCKEVENTS
 361         select USB_ARCH_HAS_EHCI
 362         help
 363           Support for systems based on the Freescale 3xxx CPUs.
 364
 365 config ARCH_NETX
 366         bool "Hilscher NetX based"
 367         select CPU_ARM926T
 368         select ARM_VIC
 369         select GENERIC_CLOCKEVENTS
 370         help
 371           This enables support for systems based on the Hilscher NetX Soc
 372
 373 config ARCH_H720X
 374         bool "Hynix HMS720x-based"
 375         select CPU_ARM720T
 376         select ISA_DMA_API
 377         select ARCH_USES_GETTIMEOFFSET
 378         help
 379           This enables support for systems based on the Hynix HMS720x
 380
 381 config ARCH_IOP13XX
 382         bool "IOP13xx-based"
 383         depends on MMU
 384         select CPU_XSC3
 385         select PLAT_IOP
 386         select PCI
 387         select ARCH_SUPPORTS_MSI
 388         select VMSPLIT_1G
 389         help
 390           Support for Intel's IOP13XX (XScale) family of processors.
 391
 392 config ARCH_IOP32X
 393         bool "IOP32x-based"
 394         depends on MMU
 395         select CPU_XSCALE
 396         select PLAT_IOP
 397         select PCI
 398         select ARCH_REQUIRE_GPIOLIB
 399         help
 400           Support for Intel's 80219 and IOP32X (XScale) family of
 401           processors.
 402
 403 config ARCH_IOP33X
 404         bool "IOP33x-based"
 405         depends on MMU
 406         select CPU_XSCALE
 407         select PLAT_IOP
 408         select PCI
 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         select ARCH_USES_GETTIMEOFFSET
 419         help
 420           Support for Intel's IXP23xx (XScale) family of processors.
 421
 422 config ARCH_IXP2000
 423         bool "IXP2400/2800-based"
 424         depends on MMU
 425         select CPU_XSCALE
 426         select PCI
 427         select ARCH_USES_GETTIMEOFFSET
 428         help
 429           Support for Intel's IXP2400/2800 (XScale) family of processors.
 430
 431 config ARCH_IXP4XX
 432         bool "IXP4xx-based"
 433         depends on MMU
 434         select CPU_XSCALE
 435         select GENERIC_GPIO
 436         select GENERIC_CLOCKEVENTS
 437         select DMABOUNCE if PCI
 438         help
 439           Support for Intel's IXP4XX (XScale) family of processors.
 440
 441 config ARCH_DOVE
 442         bool "Marvell Dove"
 443         select PCI
 444         select ARCH_REQUIRE_GPIOLIB
 445         select GENERIC_CLOCKEVENTS
 446         select PLAT_ORION
 447         help
 448           Support for the Marvell Dove SoC 88AP510
 449
 450 config ARCH_KIRKWOOD
 451         bool "Marvell Kirkwood"
 452         select CPU_FEROCEON
 453         select PCI
 454         select ARCH_REQUIRE_GPIOLIB
 455         select GENERIC_CLOCKEVENTS
 456         select PLAT_ORION
 457         help
 458           Support for the following Marvell Kirkwood series SoCs:
 459           88F6180, 88F6192 and 88F6281.
 460
 461 config ARCH_LOKI
 462         bool "Marvell Loki (88RC8480)"
 463         select CPU_FEROCEON
 464         select GENERIC_CLOCKEVENTS
 465         select PLAT_ORION
 466         help
 467           Support for the Marvell Loki (88RC8480) SoC.
 468
 469 config ARCH_LPC32XX
 470         bool "NXP LPC32XX"
 471         select CPU_ARM926T
 472         select ARCH_REQUIRE_GPIOLIB
 473         select HAVE_IDE
 474         select ARM_AMBA
 475         select USB_ARCH_HAS_OHCI
 476         select COMMON_CLKDEV
 477         select GENERIC_TIME
 478         select GENERIC_CLOCKEVENTS
 479         help
 480           Support for the NXP LPC32XX family of processors
 481
 482 config ARCH_MV78XX0
 483         bool "Marvell MV78xx0"
 484         select CPU_FEROCEON
 485         select PCI
 486         select ARCH_REQUIRE_GPIOLIB
 487         select GENERIC_CLOCKEVENTS
 488         select PLAT_ORION
 489         help
 490           Support for the following Marvell MV78xx0 series SoCs:
 491           MV781x0, MV782x0.
 492
 493 config ARCH_ORION5X
 494         bool "Marvell Orion"
 495         depends on MMU
 496         select CPU_FEROCEON
 497         select PCI
 498         select ARCH_REQUIRE_GPIOLIB
 499         select GENERIC_CLOCKEVENTS
 500         select PLAT_ORION
 501         help
 502           Support for the following Marvell Orion 5x series SoCs:
 503           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 504           Orion-2 (5281), Orion-1-90 (6183).
 505
 506 config ARCH_MMP
 507         bool "Marvell PXA168/910/MMP2"
 508         depends on MMU
 509         select ARCH_REQUIRE_GPIOLIB
 510         select COMMON_CLKDEV
 511         select GENERIC_CLOCKEVENTS
 512         select TICK_ONESHOT
 513         select PLAT_PXA
 514         help
 515           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 516
 517 config ARCH_KS8695
 518         bool "Micrel/Kendin KS8695"
 519         select CPU_ARM922T
 520         select ARCH_REQUIRE_GPIOLIB
 521         select ARCH_USES_GETTIMEOFFSET
 522         help
 523           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 524           System-on-Chip devices.
 525
 526 config ARCH_NS9XXX
 527         bool "NetSilicon NS9xxx"
 528         select CPU_ARM926T
 529         select GENERIC_GPIO
 530         select GENERIC_CLOCKEVENTS
 531         select HAVE_CLK
 532         help
 533           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 534           System.
 535
 536           <http://www.digi.com/products/microprocessors/index.jsp>
 537
 538 config ARCH_W90X900
 539         bool "Nuvoton W90X900 CPU"
 540         select CPU_ARM926T
 541         select ARCH_REQUIRE_GPIOLIB
 542         select COMMON_CLKDEV
 543         select GENERIC_CLOCKEVENTS
 544         help
 545           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 546           At present, the w90x900 has been renamed nuc900, regarding
 547           the ARM series product line, you can login the following
 548           link address to know more.
 549
 550           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 551                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 552
 553 config ARCH_NUC93X
 554         bool "Nuvoton NUC93X CPU"
 555         select CPU_ARM926T
 556         select COMMON_CLKDEV
 557         help
 558           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 559           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 560
 561 config ARCH_TEGRA
 562         bool "NVIDIA Tegra"
 563         select GENERIC_TIME
 564         select GENERIC_CLOCKEVENTS
 565         select GENERIC_GPIO
 566         select HAVE_CLK
 567         select COMMON_CLKDEV
 568         select ARCH_HAS_BARRIERS if CACHE_L2X0
 569         help
 570           This enables support for NVIDIA Tegra based systems (Tegra APX,
 571           Tegra 6xx and Tegra 2 series).
 572
 573 config ARCH_PNX4008
 574         bool "Philips Nexperia PNX4008 Mobile"
 575         select CPU_ARM926T
 576         select COMMON_CLKDEV
 577         select ARCH_USES_GETTIMEOFFSET
 578         help
 579           This enables support for Philips PNX4008 mobile platform.
 580
 581 config ARCH_PXA
 582         bool "PXA2xx/PXA3xx-based"
 583         depends on MMU
 584         select ARCH_MTD_XIP
 585         select ARCH_HAS_CPUFREQ
 586         select COMMON_CLKDEV
 587         select ARCH_REQUIRE_GPIOLIB
 588         select GENERIC_CLOCKEVENTS
 589         select TICK_ONESHOT
 590         select PLAT_PXA
 591         help
 592           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 593
 594 config ARCH_MSM
 595         bool "Qualcomm MSM"
 596         select HAVE_CLK
 597         select GENERIC_CLOCKEVENTS
 598         select ARCH_REQUIRE_GPIOLIB
 599         help
 600           Support for Qualcomm MSM/QSD based systems.  This runs on the
 601           apps processor of the MSM/QSD and depends on a shared memory
 602           interface to the modem processor which runs the baseband
 603           stack and controls some vital subsystems
 604           (clock and power control, etc).
 605
 606 config ARCH_SHMOBILE
 607         bool "Renesas SH-Mobile"
 608         help
 609           Support for Renesas's SH-Mobile ARM platforms
 610
 611 config ARCH_RPC
 612         bool "RiscPC"
 613         select ARCH_ACORN
 614         select FIQ
 615         select TIMER_ACORN
 616         select ARCH_MAY_HAVE_PC_FDC
 617         select HAVE_PATA_PLATFORM
 618         select ISA_DMA_API
 619         select NO_IOPORT
 620         select ARCH_SPARSEMEM_ENABLE
 621         select ARCH_USES_GETTIMEOFFSET
 622         help
 623           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 624           CD-ROM interface, serial and parallel port, and the floppy drive.
 625
 626 config ARCH_SA1100
 627         bool "SA1100-based"
 628         select CPU_SA1100
 629         select ISA
 630         select ARCH_SPARSEMEM_ENABLE
 631         select ARCH_MTD_XIP
 632         select ARCH_HAS_CPUFREQ
 633         select CPU_FREQ
 634         select GENERIC_CLOCKEVENTS
 635         select HAVE_CLK
 636         select TICK_ONESHOT
 637         select ARCH_REQUIRE_GPIOLIB
 638         help
 639           Support for StrongARM 11x0 based boards.
 640
 641 config ARCH_S3C2410
 642         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
 643         select GENERIC_GPIO
 644         select ARCH_HAS_CPUFREQ
 645         select HAVE_CLK
 646         select ARCH_USES_GETTIMEOFFSET
 647         select HAVE_S3C2410_I2C
 648         help
 649           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 650           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 651           the Samsung SMDK2410 development board (and derivatives).
 652
 653           Note, the S3C2416 and the S3C2450 are so close that they even share
 654           the same SoC ID code. This means that there is no seperate machine
 655           directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
 656
 657 config ARCH_S3C64XX
 658         bool "Samsung S3C64XX"
 659         select PLAT_SAMSUNG
 660         select CPU_V6
 661         select ARM_VIC
 662         select HAVE_CLK
 663         select NO_IOPORT
 664         select ARCH_USES_GETTIMEOFFSET
 665         select ARCH_HAS_CPUFREQ
 666         select ARCH_REQUIRE_GPIOLIB
 667         select SAMSUNG_CLKSRC
 668         select SAMSUNG_IRQ_VIC_TIMER
 669         select SAMSUNG_IRQ_UART
 670         select S3C_GPIO_TRACK
 671         select S3C_GPIO_PULL_UPDOWN
 672         select S3C_GPIO_CFG_S3C24XX
 673         select S3C_GPIO_CFG_S3C64XX
 674         select S3C_DEV_NAND
 675         select USB_ARCH_HAS_OHCI
 676         select SAMSUNG_GPIOLIB_4BIT
 677         select HAVE_S3C2410_I2C
 678         select HAVE_S3C2410_WATCHDOG
 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         select HAVE_S3C2410_WATCHDOG
 688         select ARCH_USES_GETTIMEOFFSET
 689         select HAVE_S3C2410_I2C
 690         select HAVE_S3C_RTC
 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         select ARCH_USES_GETTIMEOFFSET
 700         select HAVE_S3C2410_WATCHDOG
 701         help
 702           Samsung S5P6442 CPU based systems
 703
 704 config ARCH_S5PC100
 705         bool "Samsung S5PC100"
 706         select GENERIC_GPIO
 707         select HAVE_CLK
 708         select CPU_V7
 709         select ARM_L1_CACHE_SHIFT_6
 710         select ARCH_USES_GETTIMEOFFSET
 711         select HAVE_S3C2410_I2C
 712         select HAVE_S3C_RTC
 713         select HAVE_S3C2410_WATCHDOG
 714         help
 715           Samsung S5PC100 series based systems
 716
 717 config ARCH_S5PV210
 718         bool "Samsung S5PV210/S5PC110"
 719         select CPU_V7
 720         select GENERIC_GPIO
 721         select HAVE_CLK
 722         select ARM_L1_CACHE_SHIFT_6
 723         select ARCH_USES_GETTIMEOFFSET
 724         select HAVE_S3C2410_I2C
 725         select HAVE_S3C_RTC
 726         select HAVE_S3C2410_WATCHDOG
 727         help
 728           Samsung S5PV210/S5PC110 series based systems
 729
 730 config ARCH_S5PV310
 731         bool "Samsung S5PV310/S5PC210"
 732         select CPU_V7
 733         select GENERIC_GPIO
 734         select HAVE_CLK
 735         select GENERIC_CLOCKEVENTS
 736         help
 737           Samsung S5PV310 series based systems
 738
 739 config ARCH_SHARK
 740         bool "Shark"
 741         select CPU_SA110
 742         select ISA
 743         select ISA_DMA
 744         select ZONE_DMA
 745         select PCI
 746         select ARCH_USES_GETTIMEOFFSET
 747         help
 748           Support for the StrongARM based Digital DNARD machine, also known
 749           as "Shark" (<http://www.shark-linux.de/shark.html>).
 750
 751 config ARCH_TCC_926
 752         bool "Telechips TCC ARM926-based systems"
 753         select CPU_ARM926T
 754         select HAVE_CLK
 755         select COMMON_CLKDEV
 756         select GENERIC_CLOCKEVENTS
 757         help
 758           Support for Telechips TCC ARM926-based systems.
 759
 760 config ARCH_LH7A40X
 761         bool "Sharp LH7A40X"
 762         select CPU_ARM922T
 763         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 764         select ARCH_USES_GETTIMEOFFSET
 765         help
 766           Say Y here for systems based on one of the Sharp LH7A40X
 767           System on a Chip processors.  These CPUs include an ARM922T
 768           core with a wide array of integrated devices for
 769           hand-held and low-power applications.
 770
 771 config ARCH_U300
 772         bool "ST-Ericsson U300 Series"
 773         depends on MMU
 774         select CPU_ARM926T
 775         select HAVE_TCM
 776         select ARM_AMBA
 777         select ARM_VIC
 778         select GENERIC_CLOCKEVENTS
 779         select COMMON_CLKDEV
 780         select GENERIC_GPIO
 781         help
 782           Support for ST-Ericsson U300 series mobile platforms.
 783
 784 config ARCH_U8500
 785         bool "ST-Ericsson U8500 Series"
 786         select CPU_V7
 787         select ARM_AMBA
 788         select GENERIC_CLOCKEVENTS
 789         select COMMON_CLKDEV
 790         select ARCH_REQUIRE_GPIOLIB
 791         help
 792           Support for ST-Ericsson's Ux500 architecture
 793
 794 config ARCH_NOMADIK
 795         bool "STMicroelectronics Nomadik"
 796         select ARM_AMBA
 797         select ARM_VIC
 798         select CPU_ARM926T
 799         select COMMON_CLKDEV
 800         select GENERIC_CLOCKEVENTS
 801         select ARCH_REQUIRE_GPIOLIB
 802         help
 803           Support for the Nomadik platform by ST-Ericsson
 804
 805 config ARCH_DAVINCI
 806         bool "TI DaVinci"
 807         select GENERIC_CLOCKEVENTS
 808         select ARCH_REQUIRE_GPIOLIB
 809         select ZONE_DMA
 810         select HAVE_IDE
 811         select COMMON_CLKDEV
 812         select GENERIC_ALLOCATOR
 813         select ARCH_HAS_HOLES_MEMORYMODEL
 814         help
 815           Support for TI's DaVinci platform.
 816
 817 config ARCH_OMAP
 818         bool "TI OMAP"
 819         select HAVE_CLK
 820         select ARCH_REQUIRE_GPIOLIB
 821         select ARCH_HAS_CPUFREQ
 822         select GENERIC_CLOCKEVENTS
 823         select ARCH_HAS_HOLES_MEMORYMODEL
 824         help
 825           Support for TI's OMAP platform (OMAP1 and OMAP2).
 826
 827 config PLAT_SPEAR
 828         bool "ST SPEAr"
 829         select ARM_AMBA
 830         select ARCH_REQUIRE_GPIOLIB
 831         select COMMON_CLKDEV
 832         select GENERIC_CLOCKEVENTS
 833         select HAVE_CLK
 834         help
 835           Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
 836
 837 endchoice
 838
 839 #
 840 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 841 # Kconfigs may be included either alphabetically (according to the
 842 # plat- suffix) or along side the corresponding mach-* source.
 843 #
 844 source "arch/arm/mach-aaec2000/Kconfig"
 845
 846 source "arch/arm/mach-at91/Kconfig"
 847
 848 source "arch/arm/mach-bcmring/Kconfig"
 849
 850 source "arch/arm/mach-clps711x/Kconfig"
 851
 852 source "arch/arm/mach-cns3xxx/Kconfig"
 853
 854 source "arch/arm/mach-davinci/Kconfig"
 855
 856 source "arch/arm/mach-dove/Kconfig"
 857
 858 source "arch/arm/mach-ep93xx/Kconfig"
 859
 860 source "arch/arm/mach-footbridge/Kconfig"
 861
 862 source "arch/arm/mach-gemini/Kconfig"
 863
 864 source "arch/arm/mach-h720x/Kconfig"
 865
 866 source "arch/arm/mach-integrator/Kconfig"
 867
 868 source "arch/arm/mach-iop32x/Kconfig"
 869
 870 source "arch/arm/mach-iop33x/Kconfig"
 871
 872 source "arch/arm/mach-iop13xx/Kconfig"
 873
 874 source "arch/arm/mach-ixp4xx/Kconfig"
 875
 876 source "arch/arm/mach-ixp2000/Kconfig"
 877
 878 source "arch/arm/mach-ixp23xx/Kconfig"
 879
 880 source "arch/arm/mach-kirkwood/Kconfig"
 881
 882 source "arch/arm/mach-ks8695/Kconfig"
 883
 884 source "arch/arm/mach-lh7a40x/Kconfig"
 885
 886 source "arch/arm/mach-loki/Kconfig"
 887
 888 source "arch/arm/mach-lpc32xx/Kconfig"
 889
 890 source "arch/arm/mach-msm/Kconfig"
 891
 892 source "arch/arm/mach-mv78xx0/Kconfig"
 893
 894 source "arch/arm/plat-mxc/Kconfig"
 895
 896 source "arch/arm/mach-netx/Kconfig"
 897
 898 source "arch/arm/mach-nomadik/Kconfig"
 899 source "arch/arm/plat-nomadik/Kconfig"
 900
 901 source "arch/arm/mach-ns9xxx/Kconfig"
 902
 903 source "arch/arm/mach-nuc93x/Kconfig"
 904
 905 source "arch/arm/plat-omap/Kconfig"
 906
 907 source "arch/arm/mach-omap1/Kconfig"
 908
 909 source "arch/arm/mach-omap2/Kconfig"
 910
 911 source "arch/arm/mach-orion5x/Kconfig"
 912
 913 source "arch/arm/mach-pxa/Kconfig"
 914 source "arch/arm/plat-pxa/Kconfig"
 915
 916 source "arch/arm/mach-mmp/Kconfig"
 917
 918 source "arch/arm/mach-realview/Kconfig"
 919
 920 source "arch/arm/mach-sa1100/Kconfig"
 921
 922 source "arch/arm/plat-samsung/Kconfig"
 923 source "arch/arm/plat-s3c24xx/Kconfig"
 924 source "arch/arm/plat-s5p/Kconfig"
 925
 926 source "arch/arm/plat-spear/Kconfig"
 927
 928 source "arch/arm/plat-tcc/Kconfig"
 929
 930 if ARCH_S3C2410
 931 source "arch/arm/mach-s3c2400/Kconfig"
 932 source "arch/arm/mach-s3c2410/Kconfig"
 933 source "arch/arm/mach-s3c2412/Kconfig"
 934 source "arch/arm/mach-s3c2416/Kconfig"
 935 source "arch/arm/mach-s3c2440/Kconfig"
 936 source "arch/arm/mach-s3c2443/Kconfig"
 937 endif
 938
 939 if ARCH_S3C64XX
 940 source "arch/arm/mach-s3c64xx/Kconfig"
 941 endif
 942
 943 source "arch/arm/mach-s5p6440/Kconfig"
 944
 945 source "arch/arm/mach-s5p6442/Kconfig"
 946
 947 source "arch/arm/mach-s5pc100/Kconfig"
 948
 949 source "arch/arm/mach-s5pv210/Kconfig"
 950
 951 source "arch/arm/mach-s5pv310/Kconfig"
 952
 953 source "arch/arm/mach-shmobile/Kconfig"
 954
 955 source "arch/arm/plat-stmp3xxx/Kconfig"
 956
 957 source "arch/arm/mach-tegra/Kconfig"
 958
 959 source "arch/arm/mach-u300/Kconfig"
 960
 961 source "arch/arm/mach-ux500/Kconfig"
 962
 963 source "arch/arm/mach-versatile/Kconfig"
 964
 965 source "arch/arm/mach-vexpress/Kconfig"
 966
 967 source "arch/arm/mach-w90x900/Kconfig"
 968
 969 # Definitions to make life easier
 970 config ARCH_ACORN
 971         bool
 972
 973 config PLAT_IOP
 974         bool
 975         select GENERIC_CLOCKEVENTS
 976
 977 config PLAT_ORION
 978         bool
 979
 980 config PLAT_PXA
 981         bool
 982
 983 config PLAT_VERSATILE
 984         bool
 985
 986 config ARM_TIMER_SP804
 987         bool
 988
 989 source arch/arm/mm/Kconfig
 990
 991 config IWMMXT
 992         bool "Enable iWMMXt support"
 993         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 994         default y if PXA27x || PXA3xx || ARCH_MMP
 995         help
 996           Enable support for iWMMXt context switching at run time if
 997           running on a CPU that supports it.
 998
 999 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
1000 config XSCALE_PMU
1001         bool
1002         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
1003         default y
1004
1005 config CPU_HAS_PMU
1006         depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
1007                    (!ARCH_OMAP3 || OMAP3_EMU)
1008         default y
1009         bool
1010
1011 if !MMU
1012 source "arch/arm/Kconfig-nommu"
1013 endif
1014
1015 config ARM_ERRATA_411920
1016         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1017         depends on CPU_V6 && !SMP
1018         help
1019           Invalidation of the Instruction Cache operation can
1020           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1021           It does not affect the MPCore. This option enables the ARM Ltd.
1022           recommended workaround.
1023
1024 config ARM_ERRATA_430973
1025         bool "ARM errata: Stale prediction on replaced interworking branch"
1026         depends on CPU_V7
1027         help
1028           This option enables the workaround for the 430973 Cortex-A8
1029           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1030           interworking branch is replaced with another code sequence at the
1031           same virtual address, whether due to self-modifying code or virtual
1032           to physical address re-mapping, Cortex-A8 does not recover from the
1033           stale interworking branch prediction. This results in Cortex-A8
1034           executing the new code sequence in the incorrect ARM or Thumb state.
1035           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1036           and also flushes the branch target cache at every context switch.
1037           Note that setting specific bits in the ACTLR register may not be
1038           available in non-secure mode.
1039
1040 config ARM_ERRATA_458693
1041         bool "ARM errata: Processor deadlock when a false hazard is created"
1042         depends on CPU_V7
1043         help
1044           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1045           erratum. For very specific sequences of memory operations, it is
1046           possible for a hazard condition intended for a cache line to instead
1047           be incorrectly associated with a different cache line. This false
1048           hazard might then cause a processor deadlock. The workaround enables
1049           the L1 caching of the NEON accesses and disables the PLD instruction
1050           in the ACTLR register. Note that setting specific bits in the ACTLR
1051           register may not be available in non-secure mode.
1052
1053 config ARM_ERRATA_460075
1054         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1055         depends on CPU_V7
1056         help
1057           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1058           erratum. Any asynchronous access to the L2 cache may encounter a
1059           situation in which recent store transactions to the L2 cache are lost
1060           and overwritten with stale memory contents from external memory. The
1061           workaround disables the write-allocate mode for the L2 cache via the
1062           ACTLR register. Note that setting specific bits in the ACTLR register
1063           may not be available in non-secure mode.
1064
1065 config PL310_ERRATA_588369
1066         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1067         depends on CACHE_L2X0 && ARCH_OMAP4
1068         help
1069            The PL310 L2 cache controller implements three types of Clean &
1070            Invalidate maintenance operations: by Physical Address
1071            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1072            They are architecturally defined to behave as the execution of a
1073            clean operation followed immediately by an invalidate operation,
1074            both performing to the same memory location. This functionality
1075            is not correctly implemented in PL310 as clean lines are not
1076            invalidated as a result of these operations. Note that this errata
1077            uses Texas Instrument's secure monitor api.
1078
1079 config ARM_ERRATA_720789
1080         bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1081         depends on CPU_V7 && SMP
1082         help
1083           This option enables the workaround for the 720789 Cortex-A9 (prior to
1084           r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1085           broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1086           As a consequence of this erratum, some TLB entries which should be
1087           invalidated are not, resulting in an incoherency in the system page
1088           tables. The workaround changes the TLB flushing routines to invalidate
1089           entries regardless of the ASID.
1090 endmenu
1091
1092 source "arch/arm/common/Kconfig"
1093
1094 menu "Bus support"
1095
1096 config ARM_AMBA
1097         bool
1098
1099 config ISA
1100         bool
1101         help
1102           Find out whether you have ISA slots on your motherboard.  ISA is the
1103           name of a bus system, i.e. the way the CPU talks to the other stuff
1104           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1105           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1106           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1107
1108 # Select ISA DMA controller support
1109 config ISA_DMA
1110         bool
1111         select ISA_DMA_API
1112
1113 # Select ISA DMA interface
1114 config ISA_DMA_API
1115         bool
1116
1117 config PCI
1118         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE || ARCH_CNS3XXX
1119         help
1120           Find out whether you have a PCI motherboard. PCI is the name of a
1121           bus system, i.e. the way the CPU talks to the other stuff inside
1122           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1123           VESA. If you have PCI, say Y, otherwise N.
1124
1125 config PCI_DOMAINS
1126         bool
1127         depends on PCI
1128
1129 config PCI_SYSCALL
1130         def_bool PCI
1131
1132 # Select the host bridge type
1133 config PCI_HOST_VIA82C505
1134         bool
1135         depends on PCI && ARCH_SHARK
1136         default y
1137
1138 config PCI_HOST_ITE8152
1139         bool
1140         depends on PCI && MACH_ARMCORE
1141         default y
1142         select DMABOUNCE
1143
1144 source "drivers/pci/Kconfig"
1145
1146 source "drivers/pcmcia/Kconfig"
1147
1148 endmenu
1149
1150 menu "Kernel Features"
1151
1152 source "kernel/time/Kconfig"
1153
1154 config SMP
1155         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1156         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1157                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
1158                  ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1159         depends on GENERIC_CLOCKEVENTS
1160         select USE_GENERIC_SMP_HELPERS
1161         select HAVE_ARM_SCU if ARCH_REALVIEW || ARCH_OMAP4 || ARCH_S5PV310 ||\
1162                  ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4
1163         help
1164           This enables support for systems with more than one CPU. If you have
1165           a system with only one CPU, like most personal computers, say N. If
1166           you have a system with more than one CPU, say Y.
1167
1168           If you say N here, the kernel will run on single and multiprocessor
1169           machines, but will use only one CPU of a multiprocessor machine. If
1170           you say Y here, the kernel will run on many, but not all, single
1171           processor machines. On a single processor machine, the kernel will
1172           run faster if you say N here.
1173
1174           See also <file:Documentation/i386/IO-APIC.txt>,
1175           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1176           <http://www.linuxdoc.org/docs.html#howto>.
1177
1178           If you don't know what to do here, say N.
1179
1180 config HAVE_ARM_SCU
1181         bool
1182         depends on SMP
1183         help
1184           This option enables support for the ARM system coherency unit
1185
1186 config HAVE_ARM_TWD
1187         bool
1188         depends on SMP
1189         help
1190           This options enables support for the ARM timer and watchdog unit
1191
1192 choice
1193         prompt "Memory split"
1194         default VMSPLIT_3G
1195         help
1196           Select the desired split between kernel and user memory.
1197
1198           If you are not absolutely sure what you are doing, leave this
1199           option alone!
1200
1201         config VMSPLIT_3G
1202                 bool "3G/1G user/kernel split"
1203         config VMSPLIT_2G
1204                 bool "2G/2G user/kernel split"
1205         config VMSPLIT_1G
1206                 bool "1G/3G user/kernel split"
1207 endchoice
1208
1209 config PAGE_OFFSET
1210         hex
1211         default 0x40000000 if VMSPLIT_1G
1212         default 0x80000000 if VMSPLIT_2G
1213         default 0xC0000000
1214
1215 config NR_CPUS
1216         int "Maximum number of CPUs (2-32)"
1217         range 2 32
1218         depends on SMP
1219         default "4"
1220
1221 config HOTPLUG_CPU
1222         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1223         depends on SMP && HOTPLUG && EXPERIMENTAL
1224         help
1225           Say Y here to experiment with turning CPUs off and on.  CPUs
1226           can be controlled through /sys/devices/system/cpu.
1227
1228 config LOCAL_TIMERS
1229         bool "Use local timer interrupts"
1230         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1231                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
1232                 ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1233         default y
1234         select HAVE_ARM_TWD if ARCH_REALVIEW || ARCH_OMAP4 || ARCH_S5PV310 || \
1235                 ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS
1236         help
1237           Enable support for local timers on SMP platforms, rather then the
1238           legacy IPI broadcast method.  Local timers allows the system
1239           accounting to be spread across the timer interval, preventing a
1240           "thundering herd" at every timer tick.
1241
1242 source kernel/Kconfig.preempt
1243
1244 config HZ
1245         int
1246         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || \
1247                 ARCH_S5P6442 || ARCH_S5PV210 || ARCH_S5PV310
1248         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1249         default AT91_TIMER_HZ if ARCH_AT91
1250         default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1251         default 100
1252
1253 config THUMB2_KERNEL
1254         bool "Compile the kernel in Thumb-2 mode"
1255         depends on CPU_V7 && EXPERIMENTAL
1256         select AEABI
1257         select ARM_ASM_UNIFIED
1258         help
1259           By enabling this option, the kernel will be compiled in
1260           Thumb-2 mode. A compiler/assembler that understand the unified
1261           ARM-Thumb syntax is needed.
1262
1263           If unsure, say N.
1264
1265 config ARM_ASM_UNIFIED
1266         bool
1267
1268 config AEABI
1269         bool "Use the ARM EABI to compile the kernel"
1270         help
1271           This option allows for the kernel to be compiled using the latest
1272           ARM ABI (aka EABI).  This is only useful if you are using a user
1273           space environment that is also compiled with EABI.
1274
1275           Since there are major incompatibilities between the legacy ABI and
1276           EABI, especially with regard to structure member alignment, this
1277           option also changes the kernel syscall calling convention to
1278           disambiguate both ABIs and allow for backward compatibility support
1279           (selected with CONFIG_OABI_COMPAT).
1280
1281           To use this you need GCC version 4.0.0 or later.
1282
1283 config OABI_COMPAT
1284         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1285         depends on AEABI && EXPERIMENTAL
1286         default y
1287         help
1288           This option preserves the old syscall interface along with the
1289           new (ARM EABI) one. It also provides a compatibility layer to
1290           intercept syscalls that have structure arguments which layout
1291           in memory differs between the legacy ABI and the new ARM EABI
1292           (only for non "thumb" binaries). This option adds a tiny
1293           overhead to all syscalls and produces a slightly larger kernel.
1294           If you know you'll be using only pure EABI user space then you
1295           can say N here. If this option is not selected and you attempt
1296           to execute a legacy ABI binary then the result will be
1297           UNPREDICTABLE (in fact it can be predicted that it won't work
1298           at all). If in doubt say Y.
1299
1300 config ARCH_HAS_HOLES_MEMORYMODEL
1301         bool
1302
1303 config ARCH_SPARSEMEM_ENABLE
1304         bool
1305
1306 config ARCH_SPARSEMEM_DEFAULT
1307         def_bool ARCH_SPARSEMEM_ENABLE
1308
1309 config ARCH_SELECT_MEMORY_MODEL
1310         def_bool ARCH_SPARSEMEM_ENABLE
1311
1312 config HIGHMEM
1313         bool "High Memory Support (EXPERIMENTAL)"
1314         depends on MMU && EXPERIMENTAL
1315         help
1316           The address space of ARM processors is only 4 Gigabytes large
1317           and it has to accommodate user address space, kernel address
1318           space as well as some memory mapped IO. That means that, if you
1319           have a large amount of physical memory and/or IO, not all of the
1320           memory can be "permanently mapped" by the kernel. The physical
1321           memory that is not permanently mapped is called "high memory".
1322
1323           Depending on the selected kernel/user memory split, minimum
1324           vmalloc space and actual amount of RAM, you may not need this
1325           option which should result in a slightly faster kernel.
1326
1327           If unsure, say n.
1328
1329 config HIGHPTE
1330         bool "Allocate 2nd-level pagetables from highmem"
1331         depends on HIGHMEM
1332         depends on !OUTER_CACHE
1333
1334 config HW_PERF_EVENTS
1335         bool "Enable hardware performance counter support for perf events"
1336         depends on PERF_EVENTS && CPU_HAS_PMU
1337         default y
1338         help
1339           Enable hardware performance counter support for perf events. If
1340           disabled, perf events will use software events only.
1341
1342 config SPARSE_IRQ
1343         def_bool n
1344         help
1345           This enables support for sparse irqs. This is useful in general
1346           as most CPUs have a fairly sparse array of IRQ vectors, which
1347           the irq_desc then maps directly on to. Systems with a high
1348           number of off-chip IRQs will want to treat this as
1349           experimental until they have been independently verified.
1350
1351 source "mm/Kconfig"
1352
1353 config FORCE_MAX_ZONEORDER
1354         int "Maximum zone order" if ARCH_SHMOBILE
1355         range 11 64 if ARCH_SHMOBILE
1356         default "9" if SA1111
1357         default "11"
1358         help
1359           The kernel memory allocator divides physically contiguous memory
1360           blocks into "zones", where each zone is a power of two number of
1361           pages.  This option selects the largest power of two that the kernel
1362           keeps in the memory allocator.  If you need to allocate very large
1363           blocks of physically contiguous memory, then you may need to
1364           increase this value.
1365
1366           This config option is actually maximum order plus one. For example,
1367           a value of 11 means that the largest free memory block is 2^10 pages.
1368
1369 config LEDS
1370         bool "Timer and CPU usage LEDs"
1371         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1372                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1373                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1374                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1375                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1376                    ARCH_AT91 || ARCH_DAVINCI || \
1377                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1378         help
1379           If you say Y here, the LEDs on your machine will be used
1380           to provide useful information about your current system status.
1381
1382           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1383           be able to select which LEDs are active using the options below. If
1384           you are compiling a kernel for the EBSA-110 or the LART however, the
1385           red LED will simply flash regularly to indicate that the system is
1386           still functional. It is safe to say Y here if you have a CATS
1387           system, but the driver will do nothing.
1388
1389 config LEDS_TIMER
1390         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1391                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1392                             || MACH_OMAP_PERSEUS2
1393         depends on LEDS
1394         depends on !GENERIC_CLOCKEVENTS
1395         default y if ARCH_EBSA110
1396         help
1397           If you say Y here, one of the system LEDs (the green one on the
1398           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1399           will flash regularly to indicate that the system is still
1400           operational. This is mainly useful to kernel hackers who are
1401           debugging unstable kernels.
1402
1403           The LART uses the same LED for both Timer LED and CPU usage LED
1404           functions. You may choose to use both, but the Timer LED function
1405           will overrule the CPU usage LED.
1406
1407 config LEDS_CPU
1408         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1409                         !ARCH_OMAP) \
1410                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1411                         || MACH_OMAP_PERSEUS2
1412         depends on LEDS
1413         help
1414           If you say Y here, the red LED will be used to give a good real
1415           time indication of CPU usage, by lighting whenever the idle task
1416           is not currently executing.
1417
1418           The LART uses the same LED for both Timer LED and CPU usage LED
1419           functions. You may choose to use both, but the Timer LED function
1420           will overrule the CPU usage LED.
1421
1422 config ALIGNMENT_TRAP
1423         bool
1424         depends on CPU_CP15_MMU
1425         default y if !ARCH_EBSA110
1426         select HAVE_PROC_CPU if PROC_FS
1427         help
1428           ARM processors cannot fetch/store information which is not
1429           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1430           address divisible by 4. On 32-bit ARM processors, these non-aligned
1431           fetch/store instructions will be emulated in software if you say
1432           here, which has a severe performance impact. This is necessary for
1433           correct operation of some network protocols. With an IP-only
1434           configuration it is safe to say N, otherwise say Y.
1435
1436 config UACCESS_WITH_MEMCPY
1437         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1438         depends on MMU && EXPERIMENTAL
1439         default y if CPU_FEROCEON
1440         help
1441           Implement faster copy_to_user and clear_user methods for CPU
1442           cores where a 8-word STM instruction give significantly higher
1443           memory write throughput than a sequence of individual 32bit stores.
1444
1445           A possible side effect is a slight increase in scheduling latency
1446           between threads sharing the same address space if they invoke
1447           such copy operations with large buffers.
1448
1449           However, if the CPU data cache is using a write-allocate mode,
1450           this option is unlikely to provide any performance gain.
1451
1452 config CC_STACKPROTECTOR
1453         bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1454         help
1455           This option turns on the -fstack-protector GCC feature. This
1456           feature puts, at the beginning of functions, a canary value on
1457           the stack just before the return address, and validates
1458           the value just before actually returning.  Stack based buffer
1459           overflows (that need to overwrite this return address) now also
1460           overwrite the canary, which gets detected and the attack is then
1461           neutralized via a kernel panic.
1462           This feature requires gcc version 4.2 or above.
1463
1464 config DEPRECATED_PARAM_STRUCT
1465         bool "Provide old way to pass kernel parameters"
1466         help
1467           This was deprecated in 2001 and announced to live on for 5 years.
1468           Some old boot loaders still use this way.
1469
1470 endmenu
1471
1472 menu "Boot options"
1473
1474 # Compressed boot loader in ROM.  Yes, we really want to ask about
1475 # TEXT and BSS so we preserve their values in the config files.
1476 config ZBOOT_ROM_TEXT
1477         hex "Compressed ROM boot loader base address"
1478         default "0"
1479         help
1480           The physical address at which the ROM-able zImage is to be
1481           placed in the target.  Platforms which normally make use of
1482           ROM-able zImage formats normally set this to a suitable
1483           value in their defconfig file.
1484
1485           If ZBOOT_ROM is not enabled, this has no effect.
1486
1487 config ZBOOT_ROM_BSS
1488         hex "Compressed ROM boot loader BSS address"
1489         default "0"
1490         help
1491           The base address of an area of read/write memory in the target
1492           for the ROM-able zImage which must be available while the
1493           decompressor is running. It must be large enough to hold the
1494           entire decompressed kernel plus an additional 128 KiB.
1495           Platforms which normally make use of ROM-able zImage formats
1496           normally set this to a suitable value in their defconfig file.
1497
1498           If ZBOOT_ROM is not enabled, this has no effect.
1499
1500 config ZBOOT_ROM
1501         bool "Compressed boot loader in ROM/flash"
1502         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1503         help
1504           Say Y here if you intend to execute your compressed kernel image
1505           (zImage) directly from ROM or flash.  If unsure, say N.
1506
1507 config CMDLINE
1508         string "Default kernel command string"
1509         default ""
1510         help
1511           On some architectures (EBSA110 and CATS), there is currently no way
1512           for the boot loader to pass arguments to the kernel. For these
1513           architectures, you should supply some command-line options at build
1514           time by entering them here. As a minimum, you should specify the
1515           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1516
1517 config CMDLINE_FORCE
1518         bool "Always use the default kernel command string"
1519         depends on CMDLINE != ""
1520         help
1521           Always use the default kernel command string, even if the boot
1522           loader passes other arguments to the kernel.
1523           This is useful if you cannot or don't want to change the
1524           command-line options your boot loader passes to the kernel.
1525
1526           If unsure, say N.
1527
1528 config XIP_KERNEL
1529         bool "Kernel Execute-In-Place from ROM"
1530         depends on !ZBOOT_ROM
1531         help
1532           Execute-In-Place allows the kernel to run from non-volatile storage
1533           directly addressable by the CPU, such as NOR flash. This saves RAM
1534           space since the text section of the kernel is not loaded from flash
1535           to RAM.  Read-write sections, such as the data section and stack,
1536           are still copied to RAM.  The XIP kernel is not compressed since
1537           it has to run directly from flash, so it will take more space to
1538           store it.  The flash address used to link the kernel object files,
1539           and for storing it, is configuration dependent. Therefore, if you
1540           say Y here, you must know the proper physical address where to
1541           store the kernel image depending on your own flash memory usage.
1542
1543           Also note that the make target becomes "make xipImage" rather than
1544           "make zImage" or "make Image".  The final kernel binary to put in
1545           ROM memory will be arch/arm/boot/xipImage.
1546
1547           If unsure, say N.
1548
1549 config XIP_PHYS_ADDR
1550         hex "XIP Kernel Physical Location"
1551         depends on XIP_KERNEL
1552         default "0x00080000"
1553         help
1554           This is the physical address in your flash memory the kernel will
1555           be linked for and stored to.  This address is dependent on your
1556           own flash usage.
1557
1558 config KEXEC
1559         bool "Kexec system call (EXPERIMENTAL)"
1560         depends on EXPERIMENTAL
1561         help
1562           kexec is a system call that implements the ability to shutdown your
1563           current kernel, and to start another kernel.  It is like a reboot
1564           but it is independent of the system firmware.   And like a reboot
1565           you can start any kernel with it, not just Linux.
1566
1567           It is an ongoing process to be certain the hardware in a machine
1568           is properly shutdown, so do not be surprised if this code does not
1569           initially work for you.  It may help to enable device hotplugging
1570           support.
1571
1572 config ATAGS_PROC
1573         bool "Export atags in procfs"
1574         depends on KEXEC
1575         default y
1576         help
1577           Should the atags used to boot the kernel be exported in an "atags"
1578           file in procfs. Useful with kexec.
1579
1580 config AUTO_ZRELADDR
1581         bool "Auto calculation of the decompressed kernel image address"
1582         depends on !ZBOOT_ROM && !ARCH_U300
1583         help
1584           ZRELADDR is the physical address where the decompressed kernel
1585           image will be placed. If AUTO_ZRELADDR is selected, the address
1586           will be determined at run-time by masking the current IP with
1587           0xf8000000. This assumes the zImage being placed in the first 128MB
1588           from start of memory.
1589
1590 endmenu
1591
1592 menu "CPU Power Management"
1593
1594 if ARCH_HAS_CPUFREQ
1595
1596 source "drivers/cpufreq/Kconfig"
1597
1598 config CPU_FREQ_SA1100
1599         bool
1600
1601 config CPU_FREQ_SA1110
1602         bool
1603
1604 config CPU_FREQ_INTEGRATOR
1605         tristate "CPUfreq driver for ARM Integrator CPUs"
1606         depends on ARCH_INTEGRATOR && CPU_FREQ
1607         default y
1608         help
1609           This enables the CPUfreq driver for ARM Integrator CPUs.
1610
1611           For details, take a look at <file:Documentation/cpu-freq>.
1612
1613           If in doubt, say Y.
1614
1615 config CPU_FREQ_PXA
1616         bool
1617         depends on CPU_FREQ && ARCH_PXA && PXA25x
1618         default y
1619         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1620
1621 config CPU_FREQ_S3C64XX
1622         bool "CPUfreq support for Samsung S3C64XX CPUs"
1623         depends on CPU_FREQ && CPU_S3C6410
1624
1625 config CPU_FREQ_S3C
1626         bool
1627         help
1628           Internal configuration node for common cpufreq on Samsung SoC
1629
1630 config CPU_FREQ_S3C24XX
1631         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1632         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1633         select CPU_FREQ_S3C
1634         help
1635           This enables the CPUfreq driver for the Samsung S3C24XX family
1636           of CPUs.
1637
1638           For details, take a look at <file:Documentation/cpu-freq>.
1639
1640           If in doubt, say N.
1641
1642 config CPU_FREQ_S3C24XX_PLL
1643         bool "Support CPUfreq changing of PLL frequency"
1644         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1645         help
1646           Compile in support for changing the PLL frequency from the
1647           S3C24XX series CPUfreq driver. The PLL takes time to settle
1648           after a frequency change, so by default it is not enabled.
1649
1650           This also means that the PLL tables for the selected CPU(s) will
1651           be built which may increase the size of the kernel image.
1652
1653 config CPU_FREQ_S3C24XX_DEBUG
1654         bool "Debug CPUfreq Samsung driver core"
1655         depends on CPU_FREQ_S3C24XX
1656         help
1657           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1658
1659 config CPU_FREQ_S3C24XX_IODEBUG
1660         bool "Debug CPUfreq Samsung driver IO timing"
1661         depends on CPU_FREQ_S3C24XX
1662         help
1663           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1664
1665 config CPU_FREQ_S3C24XX_DEBUGFS
1666         bool "Export debugfs for CPUFreq"
1667         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1668         help
1669           Export status information via debugfs.
1670
1671 endif
1672
1673 source "drivers/cpuidle/Kconfig"
1674
1675 endmenu
1676
1677 menu "Floating point emulation"
1678
1679 comment "At least one emulation must be selected"
1680
1681 config FPE_NWFPE
1682         bool "NWFPE math emulation"
1683         depends on !AEABI || OABI_COMPAT
1684         ---help---
1685           Say Y to include the NWFPE floating point emulator in the kernel.
1686           This is necessary to run most binaries. Linux does not currently
1687           support floating point hardware so you need to say Y here even if
1688           your machine has an FPA or floating point co-processor podule.
1689
1690           You may say N here if you are going to load the Acorn FPEmulator
1691           early in the bootup.
1692
1693 config FPE_NWFPE_XP
1694         bool "Support extended precision"
1695         depends on FPE_NWFPE
1696         help
1697           Say Y to include 80-bit support in the kernel floating-point
1698           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1699           Note that gcc does not generate 80-bit operations by default,
1700           so in most cases this option only enlarges the size of the
1701           floating point emulator without any good reason.
1702
1703           You almost surely want to say N here.
1704
1705 config FPE_FASTFPE
1706         bool "FastFPE math emulation (EXPERIMENTAL)"
1707         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1708         ---help---
1709           Say Y here to include the FAST floating point emulator in the kernel.
1710           This is an experimental much faster emulator which now also has full
1711           precision for the mantissa.  It does not support any exceptions.
1712           It is very simple, and approximately 3-6 times faster than NWFPE.
1713
1714           It should be sufficient for most programs.  It may be not suitable
1715           for scientific calculations, but you have to check this for yourself.
1716           If you do not feel you need a faster FP emulation you should better
1717           choose NWFPE.
1718
1719 config VFP
1720         bool "VFP-format floating point maths"
1721         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1722         help
1723           Say Y to include VFP support code in the kernel. This is needed
1724           if your hardware includes a VFP unit.
1725
1726           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1727           release notes and additional status information.
1728
1729           Say N if your target does not have VFP hardware.
1730
1731 config VFPv3
1732         bool
1733         depends on VFP
1734         default y if CPU_V7
1735
1736 config NEON
1737         bool "Advanced SIMD (NEON) Extension support"
1738         depends on VFPv3 && CPU_V7
1739         help
1740           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1741           Extension.
1742
1743 endmenu
1744
1745 menu "Userspace binary formats"
1746
1747 source "fs/Kconfig.binfmt"
1748
1749 config ARTHUR
1750         tristate "RISC OS personality"
1751         depends on !AEABI
1752         help
1753           Say Y here to include the kernel code necessary if you want to run
1754           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1755           experimental; if this sounds frightening, say N and sleep in peace.
1756           You can also say M here to compile this support as a module (which
1757           will be called arthur).
1758
1759 endmenu
1760
1761 menu "Power management options"
1762
1763 source "kernel/power/Kconfig"
1764
1765 config ARCH_SUSPEND_POSSIBLE
1766         def_bool y
1767
1768 endmenu
1769
1770 source "net/Kconfig"
1771
1772 source "drivers/Kconfig"
1773
1774 source "fs/Kconfig"
1775
1776 source "arch/arm/Kconfig.debug"
1777
1778 source "security/Kconfig"
1779
1780 source "crypto/Kconfig"
1781
1782 source "lib/Kconfig"