arch/arm/Kconfig

   1 config ARM
   2         bool
   3         default y
   4         select HAVE_AOUT
   5         select HAVE_DMA_API_DEBUG
   6         select HAVE_IDE
   7         select HAVE_MEMBLOCK
   8         select RTC_LIB
   9         select SYS_SUPPORTS_APM_EMULATION
  10         select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  11         select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  12         select HAVE_ARCH_KGDB
  13         select HAVE_KPROBES if !XIP_KERNEL
  14         select HAVE_KRETPROBES if (HAVE_KPROBES)
  15         select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  16         select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  17         select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  18         select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  19         select HAVE_GENERIC_DMA_COHERENT
  20         select HAVE_KERNEL_GZIP
  21         select HAVE_KERNEL_LZO
  22         select HAVE_KERNEL_LZMA
  23         select HAVE_IRQ_WORK
  24         select HAVE_PERF_EVENTS
  25         select PERF_USE_VMALLOC
  26         select HAVE_REGS_AND_STACK_ACCESS_API
  27         select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  28         select HAVE_C_RECORDMCOUNT
  29         select HAVE_GENERIC_HARDIRQS
  30         select HAVE_SPARSE_IRQ
  31         select GENERIC_IRQ_SHOW
  32         help
  33           The ARM series is a line of low-power-consumption RISC chip designs
  34           licensed by ARM Ltd and targeted at embedded applications and
  35           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  36           manufactured, but legacy ARM-based PC hardware remains popular in
  37           Europe.  There is an ARM Linux project with a web page at
  38           <http://www.arm.linux.org.uk/>.
  39
  40 config ARM_HAS_SG_CHAIN
  41         bool
  42
  43 config HAVE_PWM
  44         bool
  45
  46 config MIGHT_HAVE_PCI
  47         bool
  48
  49 config SYS_SUPPORTS_APM_EMULATION
  50         bool
  51
  52 config HAVE_SCHED_CLOCK
  53         bool
  54
  55 config GENERIC_GPIO
  56         bool
  57
  58 config ARCH_USES_GETTIMEOFFSET
  59         bool
  60         default n
  61
  62 config GENERIC_CLOCKEVENTS
  63         bool
  64
  65 config GENERIC_CLOCKEVENTS_BROADCAST
  66         bool
  67         depends on GENERIC_CLOCKEVENTS
  68         default y if SMP
  69
  70 config KTIME_SCALAR
  71         bool
  72         default y
  73
  74 config HAVE_TCM
  75         bool
  76         select GENERIC_ALLOCATOR
  77
  78 config HAVE_PROC_CPU
  79         bool
  80
  81 config NO_IOPORT
  82         bool
  83
  84 config EISA
  85         bool
  86         ---help---
  87           The Extended Industry Standard Architecture (EISA) bus was
  88           developed as an open alternative to the IBM MicroChannel bus.
  89
  90           The EISA bus provided some of the features of the IBM MicroChannel
  91           bus while maintaining backward compatibility with cards made for
  92           the older ISA bus.  The EISA bus saw limited use between 1988 and
  93           1995 when it was made obsolete by the PCI bus.
  94
  95           Say Y here if you are building a kernel for an EISA-based machine.
  96
  97           Otherwise, say N.
  98
  99 config SBUS
 100         bool
 101
 102 config MCA
 103         bool
 104         help
 105           MicroChannel Architecture is found in some IBM PS/2 machines and
 106           laptops.  It is a bus system similar to PCI or ISA. See
 107           <file:Documentation/mca.txt> (and especially the web page given
 108           there) before attempting to build an MCA bus kernel.
 109
 110 config STACKTRACE_SUPPORT
 111         bool
 112         default y
 113
 114 config HAVE_LATENCYTOP_SUPPORT
 115         bool
 116         depends on !SMP
 117         default y
 118
 119 config LOCKDEP_SUPPORT
 120         bool
 121         default y
 122
 123 config TRACE_IRQFLAGS_SUPPORT
 124         bool
 125         default y
 126
 127 config HARDIRQS_SW_RESEND
 128         bool
 129         default y
 130
 131 config GENERIC_IRQ_PROBE
 132         bool
 133         default y
 134
 135 config GENERIC_LOCKBREAK
 136         bool
 137         default y
 138         depends on SMP && PREEMPT
 139
 140 config RWSEM_GENERIC_SPINLOCK
 141         bool
 142         default y
 143
 144 config RWSEM_XCHGADD_ALGORITHM
 145         bool
 146
 147 config ARCH_HAS_ILOG2_U32
 148         bool
 149
 150 config ARCH_HAS_ILOG2_U64
 151         bool
 152
 153 config ARCH_HAS_CPUFREQ
 154         bool
 155         help
 156           Internal node to signify that the ARCH has CPUFREQ support
 157           and that the relevant menu configurations are displayed for
 158           it.
 159
 160 config ARCH_HAS_CPU_IDLE_WAIT
 161        def_bool y
 162
 163 config GENERIC_HWEIGHT
 164         bool
 165         default y
 166
 167 config GENERIC_CALIBRATE_DELAY
 168         bool
 169         default y
 170
 171 config ARCH_MAY_HAVE_PC_FDC
 172         bool
 173
 174 config ZONE_DMA
 175         bool
 176
 177 config NEED_DMA_MAP_STATE
 178        def_bool y
 179
 180 config GENERIC_ISA_DMA
 181         bool
 182
 183 config FIQ
 184         bool
 185
 186 config ARCH_MTD_XIP
 187         bool
 188
 189 config VECTORS_BASE
 190         hex
 191         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 192         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 193         default 0x00000000
 194         help
 195           The base address of exception vectors.
 196
 197 config ARM_PATCH_PHYS_VIRT
 198         bool "Patch physical to virtual translations at runtime"
 199         depends on !XIP_KERNEL && MMU
 200         depends on !ARCH_REALVIEW || !SPARSEMEM
 201         help
 202           Patch phys-to-virt and virt-to-phys translation functions at
 203           boot and module load time according to the position of the
 204           kernel in system memory.
 205
 206           This can only be used with non-XIP MMU kernels where the base
 207           of physical memory is at a 16MB boundary, or theoretically 64K
 208           for the MSM machine class.
 209
 210 config ARM_PATCH_PHYS_VIRT_16BIT
 211         def_bool y
 212         depends on ARM_PATCH_PHYS_VIRT && ARCH_MSM
 213         help
 214           This option extends the physical to virtual translation patching
 215           to allow physical memory down to a theoretical minimum of 64K
 216           boundaries.
 217
 218 source "init/Kconfig"
 219
 220 source "kernel/Kconfig.freezer"
 221
 222 menu "System Type"
 223
 224 config MMU
 225         bool "MMU-based Paged Memory Management Support"
 226         default y
 227         help
 228           Select if you want MMU-based virtualised addressing space
 229           support by paged memory management. If unsure, say 'Y'.
 230
 231 #
 232 # The "ARM system type" choice list is ordered alphabetically by option
 233 # text.  Please add new entries in the option alphabetic order.
 234 #
 235 choice
 236         prompt "ARM system type"
 237         default ARCH_VERSATILE
 238
 239 config ARCH_INTEGRATOR
 240         bool "ARM Ltd. Integrator family"
 241         select ARM_AMBA
 242         select ARCH_HAS_CPUFREQ
 243         select CLKDEV_LOOKUP
 244         select HAVE_MACH_CLKDEV
 245         select ICST
 246         select GENERIC_CLOCKEVENTS
 247         select PLAT_VERSATILE
 248         select PLAT_VERSATILE_FPGA_IRQ
 249         help
 250           Support for ARM's Integrator platform.
 251
 252 config ARCH_REALVIEW
 253         bool "ARM Ltd. RealView family"
 254         select ARM_AMBA
 255         select CLKDEV_LOOKUP
 256         select HAVE_MACH_CLKDEV
 257         select ICST
 258         select GENERIC_CLOCKEVENTS
 259         select ARCH_WANT_OPTIONAL_GPIOLIB
 260         select PLAT_VERSATILE
 261         select PLAT_VERSATILE_CLCD
 262         select ARM_TIMER_SP804
 263         select GPIO_PL061 if GPIOLIB
 264         help
 265           This enables support for ARM Ltd RealView boards.
 266
 267 config ARCH_VERSATILE
 268         bool "ARM Ltd. Versatile family"
 269         select ARM_AMBA
 270         select ARM_VIC
 271         select CLKDEV_LOOKUP
 272         select HAVE_MACH_CLKDEV
 273         select ICST
 274         select GENERIC_CLOCKEVENTS
 275         select ARCH_WANT_OPTIONAL_GPIOLIB
 276         select PLAT_VERSATILE
 277         select PLAT_VERSATILE_CLCD
 278         select PLAT_VERSATILE_FPGA_IRQ
 279         select ARM_TIMER_SP804
 280         help
 281           This enables support for ARM Ltd Versatile board.
 282
 283 config ARCH_VEXPRESS
 284         bool "ARM Ltd. Versatile Express family"
 285         select ARCH_WANT_OPTIONAL_GPIOLIB
 286         select ARM_AMBA
 287         select ARM_TIMER_SP804
 288         select CLKDEV_LOOKUP
 289         select HAVE_MACH_CLKDEV
 290         select GENERIC_CLOCKEVENTS
 291         select HAVE_CLK
 292         select HAVE_PATA_PLATFORM
 293         select ICST
 294         select PLAT_VERSATILE
 295         select PLAT_VERSATILE_CLCD
 296         help
 297           This enables support for the ARM Ltd Versatile Express boards.
 298
 299 config ARCH_AT91
 300         bool "Atmel AT91"
 301         select ARCH_REQUIRE_GPIOLIB
 302         select HAVE_CLK
 303         select CLKDEV_LOOKUP
 304         select ARM_PATCH_PHYS_VIRT if MMU
 305         help
 306           This enables support for systems based on the Atmel AT91RM9200,
 307           AT91SAM9 and AT91CAP9 processors.
 308
 309 config ARCH_BCMRING
 310         bool "Broadcom BCMRING"
 311         depends on MMU
 312         select CPU_V6
 313         select ARM_AMBA
 314         select ARM_TIMER_SP804
 315         select CLKDEV_LOOKUP
 316         select GENERIC_CLOCKEVENTS
 317         select ARCH_WANT_OPTIONAL_GPIOLIB
 318         help
 319           Support for Broadcom's BCMRing platform.
 320
 321 config ARCH_CLPS711X
 322         bool "Cirrus Logic CLPS711x/EP721x-based"
 323         select CPU_ARM720T
 324         select ARCH_USES_GETTIMEOFFSET
 325         help
 326           Support for Cirrus Logic 711x/721x based boards.
 327
 328 config ARCH_CNS3XXX
 329         bool "Cavium Networks CNS3XXX family"
 330         select CPU_V6K
 331         select GENERIC_CLOCKEVENTS
 332         select ARM_GIC
 333         select MIGHT_HAVE_PCI
 334         select PCI_DOMAINS if PCI
 335         help
 336           Support for Cavium Networks CNS3XXX platform.
 337
 338 config ARCH_GEMINI
 339         bool "Cortina Systems Gemini"
 340         select CPU_FA526
 341         select ARCH_REQUIRE_GPIOLIB
 342         select ARCH_USES_GETTIMEOFFSET
 343         help
 344           Support for the Cortina Systems Gemini family SoCs
 345
 346 config ARCH_PRIMA2
 347         bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
 348         select CPU_V7
 349         select GENERIC_TIME
 350         select NO_IOPORT
 351         select GENERIC_CLOCKEVENTS
 352         select CLKDEV_LOOKUP
 353         select GENERIC_IRQ_CHIP
 354         select USE_OF
 355         select ZONE_DMA
 356         help
 357           Support for CSR SiRFSoC ARM Cortex A9 Platform
 358
 359 config ARCH_EBSA110
 360         bool "EBSA-110"
 361         select CPU_SA110
 362         select ISA
 363         select NO_IOPORT
 364         select ARCH_USES_GETTIMEOFFSET
 365         help
 366           This is an evaluation board for the StrongARM processor available
 367           from Digital. It has limited hardware on-board, including an
 368           Ethernet interface, two PCMCIA sockets, two serial ports and a
 369           parallel port.
 370
 371 config ARCH_EP93XX
 372         bool "EP93xx-based"
 373         select CPU_ARM920T
 374         select ARM_AMBA
 375         select ARM_VIC
 376         select CLKDEV_LOOKUP
 377         select ARCH_REQUIRE_GPIOLIB
 378         select ARCH_HAS_HOLES_MEMORYMODEL
 379         select ARCH_USES_GETTIMEOFFSET
 380         help
 381           This enables support for the Cirrus EP93xx series of CPUs.
 382
 383 config ARCH_FOOTBRIDGE
 384         bool "FootBridge"
 385         select CPU_SA110
 386         select FOOTBRIDGE
 387         select GENERIC_CLOCKEVENTS
 388         help
 389           Support for systems based on the DC21285 companion chip
 390           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 391
 392 config ARCH_MXC
 393         bool "Freescale MXC/iMX-based"
 394         select GENERIC_CLOCKEVENTS
 395         select ARCH_REQUIRE_GPIOLIB
 396         select CLKDEV_LOOKUP
 397         select CLKSRC_MMIO
 398         select GENERIC_IRQ_CHIP
 399         select HAVE_SCHED_CLOCK
 400         help
 401           Support for Freescale MXC/iMX-based family of processors
 402
 403 config ARCH_MXS
 404         bool "Freescale MXS-based"
 405         select GENERIC_CLOCKEVENTS
 406         select ARCH_REQUIRE_GPIOLIB
 407         select CLKDEV_LOOKUP
 408         select CLKSRC_MMIO
 409         help
 410           Support for Freescale MXS-based family of processors
 411
 412 config ARCH_NETX
 413         bool "Hilscher NetX based"
 414         select CLKSRC_MMIO
 415         select CPU_ARM926T
 416         select ARM_VIC
 417         select GENERIC_CLOCKEVENTS
 418         help
 419           This enables support for systems based on the Hilscher NetX Soc
 420
 421 config ARCH_H720X
 422         bool "Hynix HMS720x-based"
 423         select CPU_ARM720T
 424         select ISA_DMA_API
 425         select ARCH_USES_GETTIMEOFFSET
 426         help
 427           This enables support for systems based on the Hynix HMS720x
 428
 429 config ARCH_IOP13XX
 430         bool "IOP13xx-based"
 431         depends on MMU
 432         select CPU_XSC3
 433         select PLAT_IOP
 434         select PCI
 435         select ARCH_SUPPORTS_MSI
 436         select VMSPLIT_1G
 437         help
 438           Support for Intel's IOP13XX (XScale) family of processors.
 439
 440 config ARCH_IOP32X
 441         bool "IOP32x-based"
 442         depends on MMU
 443         select CPU_XSCALE
 444         select PLAT_IOP
 445         select PCI
 446         select ARCH_REQUIRE_GPIOLIB
 447         help
 448           Support for Intel's 80219 and IOP32X (XScale) family of
 449           processors.
 450
 451 config ARCH_IOP33X
 452         bool "IOP33x-based"
 453         depends on MMU
 454         select CPU_XSCALE
 455         select PLAT_IOP
 456         select PCI
 457         select ARCH_REQUIRE_GPIOLIB
 458         help
 459           Support for Intel's IOP33X (XScale) family of processors.
 460
 461 config ARCH_IXP23XX
 462         bool "IXP23XX-based"
 463         depends on MMU
 464         select CPU_XSC3
 465         select PCI
 466         select ARCH_USES_GETTIMEOFFSET
 467         help
 468           Support for Intel's IXP23xx (XScale) family of processors.
 469
 470 config ARCH_IXP2000
 471         bool "IXP2400/2800-based"
 472         depends on MMU
 473         select CPU_XSCALE
 474         select PCI
 475         select ARCH_USES_GETTIMEOFFSET
 476         help
 477           Support for Intel's IXP2400/2800 (XScale) family of processors.
 478
 479 config ARCH_IXP4XX
 480         bool "IXP4xx-based"
 481         depends on MMU
 482         select CLKSRC_MMIO
 483         select CPU_XSCALE
 484         select GENERIC_GPIO
 485         select GENERIC_CLOCKEVENTS
 486         select HAVE_SCHED_CLOCK
 487         select MIGHT_HAVE_PCI
 488         select DMABOUNCE if PCI
 489         help
 490           Support for Intel's IXP4XX (XScale) family of processors.
 491
 492 config ARCH_DOVE
 493         bool "Marvell Dove"
 494         select CPU_V7
 495         select PCI
 496         select ARCH_REQUIRE_GPIOLIB
 497         select GENERIC_CLOCKEVENTS
 498         select PLAT_ORION
 499         help
 500           Support for the Marvell Dove SoC 88AP510
 501
 502 config ARCH_KIRKWOOD
 503         bool "Marvell Kirkwood"
 504         select CPU_FEROCEON
 505         select PCI
 506         select ARCH_REQUIRE_GPIOLIB
 507         select GENERIC_CLOCKEVENTS
 508         select PLAT_ORION
 509         help
 510           Support for the following Marvell Kirkwood series SoCs:
 511           88F6180, 88F6192 and 88F6281.
 512
 513 config ARCH_LPC32XX
 514         bool "NXP LPC32XX"
 515         select CLKSRC_MMIO
 516         select CPU_ARM926T
 517         select ARCH_REQUIRE_GPIOLIB
 518         select HAVE_IDE
 519         select ARM_AMBA
 520         select USB_ARCH_HAS_OHCI
 521         select CLKDEV_LOOKUP
 522         select GENERIC_TIME
 523         select GENERIC_CLOCKEVENTS
 524         help
 525           Support for the NXP LPC32XX family of processors
 526
 527 config ARCH_MV78XX0
 528         bool "Marvell MV78xx0"
 529         select CPU_FEROCEON
 530         select PCI
 531         select ARCH_REQUIRE_GPIOLIB
 532         select GENERIC_CLOCKEVENTS
 533         select PLAT_ORION
 534         help
 535           Support for the following Marvell MV78xx0 series SoCs:
 536           MV781x0, MV782x0.
 537
 538 config ARCH_ORION5X
 539         bool "Marvell Orion"
 540         depends on MMU
 541         select CPU_FEROCEON
 542         select PCI
 543         select ARCH_REQUIRE_GPIOLIB
 544         select GENERIC_CLOCKEVENTS
 545         select PLAT_ORION
 546         help
 547           Support for the following Marvell Orion 5x series SoCs:
 548           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 549           Orion-2 (5281), Orion-1-90 (6183).
 550
 551 config ARCH_MMP
 552         bool "Marvell PXA168/910/MMP2"
 553         depends on MMU
 554         select ARCH_REQUIRE_GPIOLIB
 555         select CLKDEV_LOOKUP
 556         select GENERIC_CLOCKEVENTS
 557         select HAVE_SCHED_CLOCK
 558         select TICK_ONESHOT
 559         select PLAT_PXA
 560         select SPARSE_IRQ
 561         help
 562           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 563
 564 config ARCH_KS8695
 565         bool "Micrel/Kendin KS8695"
 566         select CPU_ARM922T
 567         select ARCH_REQUIRE_GPIOLIB
 568         select ARCH_USES_GETTIMEOFFSET
 569         help
 570           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 571           System-on-Chip devices.
 572
 573 config ARCH_W90X900
 574         bool "Nuvoton W90X900 CPU"
 575         select CPU_ARM926T
 576         select ARCH_REQUIRE_GPIOLIB
 577         select CLKDEV_LOOKUP
 578         select CLKSRC_MMIO
 579         select GENERIC_CLOCKEVENTS
 580         help
 581           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 582           At present, the w90x900 has been renamed nuc900, regarding
 583           the ARM series product line, you can login the following
 584           link address to know more.
 585
 586           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 587                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 588
 589 config ARCH_NUC93X
 590         bool "Nuvoton NUC93X CPU"
 591         select CPU_ARM926T
 592         select CLKDEV_LOOKUP
 593         help
 594           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 595           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 596
 597 config ARCH_TEGRA
 598         bool "NVIDIA Tegra"
 599         select CLKDEV_LOOKUP
 600         select CLKSRC_MMIO
 601         select GENERIC_TIME
 602         select GENERIC_CLOCKEVENTS
 603         select GENERIC_GPIO
 604         select HAVE_CLK
 605         select HAVE_SCHED_CLOCK
 606         select ARCH_HAS_CPUFREQ
 607         help
 608           This enables support for NVIDIA Tegra based systems (Tegra APX,
 609           Tegra 6xx and Tegra 2 series).
 610
 611 config ARCH_PNX4008
 612         bool "Philips Nexperia PNX4008 Mobile"
 613         select CPU_ARM926T
 614         select CLKDEV_LOOKUP
 615         select ARCH_USES_GETTIMEOFFSET
 616         help
 617           This enables support for Philips PNX4008 mobile platform.
 618
 619 config ARCH_PXA
 620         bool "PXA2xx/PXA3xx-based"
 621         depends on MMU
 622         select ARCH_MTD_XIP
 623         select ARCH_HAS_CPUFREQ
 624         select CLKDEV_LOOKUP
 625         select CLKSRC_MMIO
 626         select ARCH_REQUIRE_GPIOLIB
 627         select GENERIC_CLOCKEVENTS
 628         select HAVE_SCHED_CLOCK
 629         select TICK_ONESHOT
 630         select PLAT_PXA
 631         select SPARSE_IRQ
 632         select AUTO_ZRELADDR
 633         select MULTI_IRQ_HANDLER
 634         help
 635           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 636
 637 config ARCH_MSM
 638         bool "Qualcomm MSM"
 639         select HAVE_CLK
 640         select GENERIC_CLOCKEVENTS
 641         select ARCH_REQUIRE_GPIOLIB
 642         select CLKDEV_LOOKUP
 643         help
 644           Support for Qualcomm MSM/QSD based systems.  This runs on the
 645           apps processor of the MSM/QSD and depends on a shared memory
 646           interface to the modem processor which runs the baseband
 647           stack and controls some vital subsystems
 648           (clock and power control, etc).
 649
 650 config ARCH_SHMOBILE
 651         bool "Renesas SH-Mobile / R-Mobile"
 652         select HAVE_CLK
 653         select CLKDEV_LOOKUP
 654         select HAVE_MACH_CLKDEV
 655         select GENERIC_CLOCKEVENTS
 656         select NO_IOPORT
 657         select SPARSE_IRQ
 658         select MULTI_IRQ_HANDLER
 659         select PM_GENERIC_DOMAINS if PM
 660         help
 661           Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
 662
 663 config ARCH_RPC
 664         bool "RiscPC"
 665         select ARCH_ACORN
 666         select FIQ
 667         select TIMER_ACORN
 668         select ARCH_MAY_HAVE_PC_FDC
 669         select HAVE_PATA_PLATFORM
 670         select ISA_DMA_API
 671         select NO_IOPORT
 672         select ARCH_SPARSEMEM_ENABLE
 673         select ARCH_USES_GETTIMEOFFSET
 674         help
 675           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 676           CD-ROM interface, serial and parallel port, and the floppy drive.
 677
 678 config ARCH_SA1100
 679         bool "SA1100-based"
 680         select CLKSRC_MMIO
 681         select CPU_SA1100
 682         select ISA
 683         select ARCH_SPARSEMEM_ENABLE
 684         select ARCH_MTD_XIP
 685         select ARCH_HAS_CPUFREQ
 686         select CPU_FREQ
 687         select GENERIC_CLOCKEVENTS
 688         select HAVE_CLK
 689         select HAVE_SCHED_CLOCK
 690         select TICK_ONESHOT
 691         select ARCH_REQUIRE_GPIOLIB
 692         help
 693           Support for StrongARM 11x0 based boards.
 694
 695 config ARCH_S3C2410
 696         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
 697         select GENERIC_GPIO
 698         select ARCH_HAS_CPUFREQ
 699         select HAVE_CLK
 700         select CLKDEV_LOOKUP
 701         select ARCH_USES_GETTIMEOFFSET
 702         select HAVE_S3C2410_I2C if I2C
 703         help
 704           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 705           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 706           the Samsung SMDK2410 development board (and derivatives).
 707
 708           Note, the S3C2416 and the S3C2450 are so close that they even share
 709           the same SoC ID code. This means that there is no separate machine
 710           directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
 711
 712 config ARCH_S3C64XX
 713         bool "Samsung S3C64XX"
 714         select PLAT_SAMSUNG
 715         select CPU_V6
 716         select ARM_VIC
 717         select HAVE_CLK
 718         select CLKDEV_LOOKUP
 719         select NO_IOPORT
 720         select ARCH_USES_GETTIMEOFFSET
 721         select ARCH_HAS_CPUFREQ
 722         select ARCH_REQUIRE_GPIOLIB
 723         select SAMSUNG_CLKSRC
 724         select SAMSUNG_IRQ_VIC_TIMER
 725         select SAMSUNG_IRQ_UART
 726         select S3C_GPIO_TRACK
 727         select S3C_GPIO_PULL_UPDOWN
 728         select S3C_GPIO_CFG_S3C24XX
 729         select S3C_GPIO_CFG_S3C64XX
 730         select S3C_DEV_NAND
 731         select USB_ARCH_HAS_OHCI
 732         select SAMSUNG_GPIOLIB_4BIT
 733         select HAVE_S3C2410_I2C if I2C
 734         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 735         help
 736           Samsung S3C64XX series based systems
 737
 738 config ARCH_S5P64X0
 739         bool "Samsung S5P6440 S5P6450"
 740         select CPU_V6
 741         select GENERIC_GPIO
 742         select HAVE_CLK
 743         select CLKDEV_LOOKUP
 744         select CLKSRC_MMIO
 745         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 746         select GENERIC_CLOCKEVENTS
 747         select HAVE_SCHED_CLOCK
 748         select HAVE_S3C2410_I2C if I2C
 749         select HAVE_S3C_RTC if RTC_CLASS
 750         help
 751           Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
 752           SMDK6450.
 753
 754 config ARCH_S5PC100
 755         bool "Samsung S5PC100"
 756         select GENERIC_GPIO
 757         select HAVE_CLK
 758         select CLKDEV_LOOKUP
 759         select CPU_V7
 760         select ARM_L1_CACHE_SHIFT_6
 761         select ARCH_USES_GETTIMEOFFSET
 762         select HAVE_S3C2410_I2C if I2C
 763         select HAVE_S3C_RTC if RTC_CLASS
 764         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 765         help
 766           Samsung S5PC100 series based systems
 767
 768 config ARCH_S5PV210
 769         bool "Samsung S5PV210/S5PC110"
 770         select CPU_V7
 771         select ARCH_SPARSEMEM_ENABLE
 772         select ARCH_HAS_HOLES_MEMORYMODEL
 773         select GENERIC_GPIO
 774         select HAVE_CLK
 775         select CLKDEV_LOOKUP
 776         select CLKSRC_MMIO
 777         select ARM_L1_CACHE_SHIFT_6
 778         select ARCH_HAS_CPUFREQ
 779         select GENERIC_CLOCKEVENTS
 780         select HAVE_SCHED_CLOCK
 781         select HAVE_S3C2410_I2C if I2C
 782         select HAVE_S3C_RTC if RTC_CLASS
 783         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 784         help
 785           Samsung S5PV210/S5PC110 series based systems
 786
 787 config ARCH_EXYNOS4
 788         bool "Samsung EXYNOS4"
 789         select CPU_V7
 790         select ARCH_SPARSEMEM_ENABLE
 791         select ARCH_HAS_HOLES_MEMORYMODEL
 792         select GENERIC_GPIO
 793         select HAVE_CLK
 794         select CLKDEV_LOOKUP
 795         select ARCH_HAS_CPUFREQ
 796         select GENERIC_CLOCKEVENTS
 797         select HAVE_S3C_RTC if RTC_CLASS
 798         select HAVE_S3C2410_I2C if I2C
 799         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 800         help
 801           Samsung EXYNOS4 series based systems
 802
 803 config ARCH_SHARK
 804         bool "Shark"
 805         select CPU_SA110
 806         select ISA
 807         select ISA_DMA
 808         select ZONE_DMA
 809         select PCI
 810         select ARCH_USES_GETTIMEOFFSET
 811         help
 812           Support for the StrongARM based Digital DNARD machine, also known
 813           as "Shark" (<http://www.shark-linux.de/shark.html>).
 814
 815 config ARCH_TCC_926
 816         bool "Telechips TCC ARM926-based systems"
 817         select CLKSRC_MMIO
 818         select CPU_ARM926T
 819         select HAVE_CLK
 820         select CLKDEV_LOOKUP
 821         select GENERIC_CLOCKEVENTS
 822         help
 823           Support for Telechips TCC ARM926-based systems.
 824
 825 config ARCH_U300
 826         bool "ST-Ericsson U300 Series"
 827         depends on MMU
 828         select CLKSRC_MMIO
 829         select CPU_ARM926T
 830         select HAVE_SCHED_CLOCK
 831         select HAVE_TCM
 832         select ARM_AMBA
 833         select ARM_VIC
 834         select GENERIC_CLOCKEVENTS
 835         select CLKDEV_LOOKUP
 836         select HAVE_MACH_CLKDEV
 837         select GENERIC_GPIO
 838         help
 839           Support for ST-Ericsson U300 series mobile platforms.
 840
 841 config ARCH_U8500
 842         bool "ST-Ericsson U8500 Series"
 843         select CPU_V7
 844         select ARM_AMBA
 845         select GENERIC_CLOCKEVENTS
 846         select CLKDEV_LOOKUP
 847         select ARCH_REQUIRE_GPIOLIB
 848         select ARCH_HAS_CPUFREQ
 849         help
 850           Support for ST-Ericsson's Ux500 architecture
 851
 852 config ARCH_NOMADIK
 853         bool "STMicroelectronics Nomadik"
 854         select ARM_AMBA
 855         select ARM_VIC
 856         select CPU_ARM926T
 857         select CLKDEV_LOOKUP
 858         select GENERIC_CLOCKEVENTS
 859         select ARCH_REQUIRE_GPIOLIB
 860         help
 861           Support for the Nomadik platform by ST-Ericsson
 862
 863 config ARCH_DAVINCI
 864         bool "TI DaVinci"
 865         select GENERIC_CLOCKEVENTS
 866         select ARCH_REQUIRE_GPIOLIB
 867         select ZONE_DMA
 868         select HAVE_IDE
 869         select CLKDEV_LOOKUP
 870         select GENERIC_ALLOCATOR
 871         select GENERIC_IRQ_CHIP
 872         select ARCH_HAS_HOLES_MEMORYMODEL
 873         help
 874           Support for TI's DaVinci platform.
 875
 876 config ARCH_OMAP
 877         bool "TI OMAP"
 878         select HAVE_CLK
 879         select ARCH_REQUIRE_GPIOLIB
 880         select ARCH_HAS_CPUFREQ
 881         select CLKSRC_MMIO
 882         select GENERIC_CLOCKEVENTS
 883         select HAVE_SCHED_CLOCK
 884         select ARCH_HAS_HOLES_MEMORYMODEL
 885         help
 886           Support for TI's OMAP platform (OMAP1/2/3/4).
 887
 888 config PLAT_SPEAR
 889         bool "ST SPEAr"
 890         select ARM_AMBA
 891         select ARCH_REQUIRE_GPIOLIB
 892         select CLKDEV_LOOKUP
 893         select CLKSRC_MMIO
 894         select GENERIC_CLOCKEVENTS
 895         select HAVE_CLK
 896         help
 897           Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
 898
 899 config ARCH_VT8500
 900         bool "VIA/WonderMedia 85xx"
 901         select CPU_ARM926T
 902         select GENERIC_GPIO
 903         select ARCH_HAS_CPUFREQ
 904         select GENERIC_CLOCKEVENTS
 905         select ARCH_REQUIRE_GPIOLIB
 906         select HAVE_PWM
 907         help
 908           Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
 909
 910 config ARCH_ZYNQ
 911         bool "Xilinx Zynq ARM Cortex A9 Platform"
 912         select CPU_V7
 913         select GENERIC_TIME
 914         select GENERIC_CLOCKEVENTS
 915         select CLKDEV_LOOKUP
 916         select ARM_GIC
 917         select ARM_AMBA
 918         select ICST
 919         select USE_OF
 920         help
 921           Support for Xilinx Zynq ARM Cortex A9 Platform
 922 endchoice
 923
 924 #
 925 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 926 # Kconfigs may be included either alphabetically (according to the
 927 # plat- suffix) or along side the corresponding mach-* source.
 928 #
 929 source "arch/arm/mach-at91/Kconfig"
 930
 931 source "arch/arm/mach-bcmring/Kconfig"
 932
 933 source "arch/arm/mach-clps711x/Kconfig"
 934
 935 source "arch/arm/mach-cns3xxx/Kconfig"
 936
 937 source "arch/arm/mach-davinci/Kconfig"
 938
 939 source "arch/arm/mach-dove/Kconfig"
 940
 941 source "arch/arm/mach-ep93xx/Kconfig"
 942
 943 source "arch/arm/mach-footbridge/Kconfig"
 944
 945 source "arch/arm/mach-gemini/Kconfig"
 946
 947 source "arch/arm/mach-h720x/Kconfig"
 948
 949 source "arch/arm/mach-integrator/Kconfig"
 950
 951 source "arch/arm/mach-iop32x/Kconfig"
 952
 953 source "arch/arm/mach-iop33x/Kconfig"
 954
 955 source "arch/arm/mach-iop13xx/Kconfig"
 956
 957 source "arch/arm/mach-ixp4xx/Kconfig"
 958
 959 source "arch/arm/mach-ixp2000/Kconfig"
 960
 961 source "arch/arm/mach-ixp23xx/Kconfig"
 962
 963 source "arch/arm/mach-kirkwood/Kconfig"
 964
 965 source "arch/arm/mach-ks8695/Kconfig"
 966
 967 source "arch/arm/mach-lpc32xx/Kconfig"
 968
 969 source "arch/arm/mach-msm/Kconfig"
 970
 971 source "arch/arm/mach-mv78xx0/Kconfig"
 972
 973 source "arch/arm/plat-mxc/Kconfig"
 974
 975 source "arch/arm/mach-mxs/Kconfig"
 976
 977 source "arch/arm/mach-netx/Kconfig"
 978
 979 source "arch/arm/mach-nomadik/Kconfig"
 980 source "arch/arm/plat-nomadik/Kconfig"
 981
 982 source "arch/arm/mach-nuc93x/Kconfig"
 983
 984 source "arch/arm/plat-omap/Kconfig"
 985
 986 source "arch/arm/mach-omap1/Kconfig"
 987
 988 source "arch/arm/mach-omap2/Kconfig"
 989
 990 source "arch/arm/mach-orion5x/Kconfig"
 991
 992 source "arch/arm/mach-pxa/Kconfig"
 993 source "arch/arm/plat-pxa/Kconfig"
 994
 995 source "arch/arm/mach-mmp/Kconfig"
 996
 997 source "arch/arm/mach-realview/Kconfig"
 998
 999 source "arch/arm/mach-sa1100/Kconfig"
1000
1001 source "arch/arm/plat-samsung/Kconfig"
1002 source "arch/arm/plat-s3c24xx/Kconfig"
1003 source "arch/arm/plat-s5p/Kconfig"
1004
1005 source "arch/arm/plat-spear/Kconfig"
1006
1007 source "arch/arm/plat-tcc/Kconfig"
1008
1009 if ARCH_S3C2410
1010 source "arch/arm/mach-s3c2410/Kconfig"
1011 source "arch/arm/mach-s3c2412/Kconfig"
1012 source "arch/arm/mach-s3c2416/Kconfig"
1013 source "arch/arm/mach-s3c2440/Kconfig"
1014 source "arch/arm/mach-s3c2443/Kconfig"
1015 endif
1016
1017 if ARCH_S3C64XX
1018 source "arch/arm/mach-s3c64xx/Kconfig"
1019 endif
1020
1021 source "arch/arm/mach-s5p64x0/Kconfig"
1022
1023 source "arch/arm/mach-s5pc100/Kconfig"
1024
1025 source "arch/arm/mach-s5pv210/Kconfig"
1026
1027 source "arch/arm/mach-exynos4/Kconfig"
1028
1029 source "arch/arm/mach-shmobile/Kconfig"
1030
1031 source "arch/arm/mach-tegra/Kconfig"
1032
1033 source "arch/arm/mach-u300/Kconfig"
1034
1035 source "arch/arm/mach-ux500/Kconfig"
1036
1037 source "arch/arm/mach-versatile/Kconfig"
1038
1039 source "arch/arm/mach-vexpress/Kconfig"
1040 source "arch/arm/plat-versatile/Kconfig"
1041
1042 source "arch/arm/mach-vt8500/Kconfig"
1043
1044 source "arch/arm/mach-w90x900/Kconfig"
1045
1046 # Definitions to make life easier
1047 config ARCH_ACORN
1048         bool
1049
1050 config PLAT_IOP
1051         bool
1052         select GENERIC_CLOCKEVENTS
1053         select HAVE_SCHED_CLOCK
1054
1055 config PLAT_ORION
1056         bool
1057         select CLKSRC_MMIO
1058         select GENERIC_IRQ_CHIP
1059         select HAVE_SCHED_CLOCK
1060
1061 config PLAT_PXA
1062         bool
1063
1064 config PLAT_VERSATILE
1065         bool
1066
1067 config ARM_TIMER_SP804
1068         bool
1069         select CLKSRC_MMIO
1070
1071 source arch/arm/mm/Kconfig
1072
1073 config IWMMXT
1074         bool "Enable iWMMXt support"
1075         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1076         default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
1077         help
1078           Enable support for iWMMXt context switching at run time if
1079           running on a CPU that supports it.
1080
1081 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
1082 config XSCALE_PMU
1083         bool
1084         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
1085         default y
1086
1087 config CPU_HAS_PMU
1088         depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
1089                    (!ARCH_OMAP3 || OMAP3_EMU)
1090         default y
1091         bool
1092
1093 config MULTI_IRQ_HANDLER
1094         bool
1095         help
1096           Allow each machine to specify it's own IRQ handler at run time.
1097
1098 if !MMU
1099 source "arch/arm/Kconfig-nommu"
1100 endif
1101
1102 config ARM_ERRATA_411920
1103         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1104         depends on CPU_V6 || CPU_V6K
1105         help
1106           Invalidation of the Instruction Cache operation can
1107           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1108           It does not affect the MPCore. This option enables the ARM Ltd.
1109           recommended workaround.
1110
1111 config ARM_ERRATA_430973
1112         bool "ARM errata: Stale prediction on replaced interworking branch"
1113         depends on CPU_V7
1114         help
1115           This option enables the workaround for the 430973 Cortex-A8
1116           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1117           interworking branch is replaced with another code sequence at the
1118           same virtual address, whether due to self-modifying code or virtual
1119           to physical address re-mapping, Cortex-A8 does not recover from the
1120           stale interworking branch prediction. This results in Cortex-A8
1121           executing the new code sequence in the incorrect ARM or Thumb state.
1122           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1123           and also flushes the branch target cache at every context switch.
1124           Note that setting specific bits in the ACTLR register may not be
1125           available in non-secure mode.
1126
1127 config ARM_ERRATA_458693
1128         bool "ARM errata: Processor deadlock when a false hazard is created"
1129         depends on CPU_V7
1130         help
1131           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1132           erratum. For very specific sequences of memory operations, it is
1133           possible for a hazard condition intended for a cache line to instead
1134           be incorrectly associated with a different cache line. This false
1135           hazard might then cause a processor deadlock. The workaround enables
1136           the L1 caching of the NEON accesses and disables the PLD instruction
1137           in the ACTLR register. Note that setting specific bits in the ACTLR
1138           register may not be available in non-secure mode.
1139
1140 config ARM_ERRATA_460075
1141         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1142         depends on CPU_V7
1143         help
1144           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1145           erratum. Any asynchronous access to the L2 cache may encounter a
1146           situation in which recent store transactions to the L2 cache are lost
1147           and overwritten with stale memory contents from external memory. The
1148           workaround disables the write-allocate mode for the L2 cache via the
1149           ACTLR register. Note that setting specific bits in the ACTLR register
1150           may not be available in non-secure mode.
1151
1152 config ARM_ERRATA_742230
1153         bool "ARM errata: DMB operation may be faulty"
1154         depends on CPU_V7 && SMP
1155         help
1156           This option enables the workaround for the 742230 Cortex-A9
1157           (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1158           between two write operations may not ensure the correct visibility
1159           ordering of the two writes. This workaround sets a specific bit in
1160           the diagnostic register of the Cortex-A9 which causes the DMB
1161           instruction to behave as a DSB, ensuring the correct behaviour of
1162           the two writes.
1163
1164 config ARM_ERRATA_742231
1165         bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1166         depends on CPU_V7 && SMP
1167         help
1168           This option enables the workaround for the 742231 Cortex-A9
1169           (r2p0..r2p2) erratum. Under certain conditions, specific to the
1170           Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1171           accessing some data located in the same cache line, may get corrupted
1172           data due to bad handling of the address hazard when the line gets
1173           replaced from one of the CPUs at the same time as another CPU is
1174           accessing it. This workaround sets specific bits in the diagnostic
1175           register of the Cortex-A9 which reduces the linefill issuing
1176           capabilities of the processor.
1177
1178 config PL310_ERRATA_588369
1179         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1180         depends on CACHE_L2X0
1181         help
1182            The PL310 L2 cache controller implements three types of Clean &
1183            Invalidate maintenance operations: by Physical Address
1184            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1185            They are architecturally defined to behave as the execution of a
1186            clean operation followed immediately by an invalidate operation,
1187            both performing to the same memory location. This functionality
1188            is not correctly implemented in PL310 as clean lines are not
1189            invalidated as a result of these operations.
1190
1191 config ARM_ERRATA_720789
1192         bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1193         depends on CPU_V7 && SMP
1194         help
1195           This option enables the workaround for the 720789 Cortex-A9 (prior to
1196           r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1197           broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1198           As a consequence of this erratum, some TLB entries which should be
1199           invalidated are not, resulting in an incoherency in the system page
1200           tables. The workaround changes the TLB flushing routines to invalidate
1201           entries regardless of the ASID.
1202
1203 config PL310_ERRATA_727915
1204         bool "Background Clean & Invalidate by Way operation can cause data corruption"
1205         depends on CACHE_L2X0
1206         help
1207           PL310 implements the Clean & Invalidate by Way L2 cache maintenance
1208           operation (offset 0x7FC). This operation runs in background so that
1209           PL310 can handle normal accesses while it is in progress. Under very
1210           rare circumstances, due to this erratum, write data can be lost when
1211           PL310 treats a cacheable write transaction during a Clean &
1212           Invalidate by Way operation.
1213
1214 config ARM_ERRATA_743622
1215         bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1216         depends on CPU_V7
1217         help
1218           This option enables the workaround for the 743622 Cortex-A9
1219           (r2p0..r2p2) erratum. Under very rare conditions, a faulty
1220           optimisation in the Cortex-A9 Store Buffer may lead to data
1221           corruption. This workaround sets a specific bit in the diagnostic
1222           register of the Cortex-A9 which disables the Store Buffer
1223           optimisation, preventing the defect from occurring. This has no
1224           visible impact on the overall performance or power consumption of the
1225           processor.
1226
1227 config ARM_ERRATA_751472
1228         bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1229         depends on CPU_V7 && SMP
1230         help
1231           This option enables the workaround for the 751472 Cortex-A9 (prior
1232           to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1233           completion of a following broadcasted operation if the second
1234           operation is received by a CPU before the ICIALLUIS has completed,
1235           potentially leading to corrupted entries in the cache or TLB.
1236
1237 config ARM_ERRATA_753970
1238         bool "ARM errata: cache sync operation may be faulty"
1239         depends on CACHE_PL310
1240         help
1241           This option enables the workaround for the 753970 PL310 (r3p0) erratum.
1242
1243           Under some condition the effect of cache sync operation on
1244           the store buffer still remains when the operation completes.
1245           This means that the store buffer is always asked to drain and
1246           this prevents it from merging any further writes. The workaround
1247           is to replace the normal offset of cache sync operation (0x730)
1248           by another offset targeting an unmapped PL310 register 0x740.
1249           This has the same effect as the cache sync operation: store buffer
1250           drain and waiting for all buffers empty.
1251
1252 config ARM_ERRATA_754322
1253         bool "ARM errata: possible faulty MMU translations following an ASID switch"
1254         depends on CPU_V7
1255         help
1256           This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1257           r3p*) erratum. A speculative memory access may cause a page table walk
1258           which starts prior to an ASID switch but completes afterwards. This
1259           can populate the micro-TLB with a stale entry which may be hit with
1260           the new ASID. This workaround places two dsb instructions in the mm
1261           switching code so that no page table walks can cross the ASID switch.
1262
1263 config ARM_ERRATA_754327
1264         bool "ARM errata: no automatic Store Buffer drain"
1265         depends on CPU_V7 && SMP
1266         help
1267           This option enables the workaround for the 754327 Cortex-A9 (prior to
1268           r2p0) erratum. The Store Buffer does not have any automatic draining
1269           mechanism and therefore a livelock may occur if an external agent
1270           continuously polls a memory location waiting to observe an update.
1271           This workaround defines cpu_relax() as smp_mb(), preventing correctly
1272           written polling loops from denying visibility of updates to memory.
1273
1274 endmenu
1275
1276 source "arch/arm/common/Kconfig"
1277
1278 menu "Bus support"
1279
1280 config ARM_AMBA
1281         bool
1282
1283 config ISA
1284         bool
1285         help
1286           Find out whether you have ISA slots on your motherboard.  ISA is the
1287           name of a bus system, i.e. the way the CPU talks to the other stuff
1288           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1289           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1290           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1291
1292 # Select ISA DMA controller support
1293 config ISA_DMA
1294         bool
1295         select ISA_DMA_API
1296
1297 # Select ISA DMA interface
1298 config ISA_DMA_API
1299         bool
1300
1301 config PCI
1302         bool "PCI support" if MIGHT_HAVE_PCI
1303         help
1304           Find out whether you have a PCI motherboard. PCI is the name of a
1305           bus system, i.e. the way the CPU talks to the other stuff inside
1306           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1307           VESA. If you have PCI, say Y, otherwise N.
1308
1309 config PCI_DOMAINS
1310         bool
1311         depends on PCI
1312
1313 config PCI_NANOENGINE
1314         bool "BSE nanoEngine PCI support"
1315         depends on SA1100_NANOENGINE
1316         help
1317           Enable PCI on the BSE nanoEngine board.
1318
1319 config PCI_SYSCALL
1320         def_bool PCI
1321
1322 # Select the host bridge type
1323 config PCI_HOST_VIA82C505
1324         bool
1325         depends on PCI && ARCH_SHARK
1326         default y
1327
1328 config PCI_HOST_ITE8152
1329         bool
1330         depends on PCI && MACH_ARMCORE
1331         default y
1332         select DMABOUNCE
1333
1334 source "drivers/pci/Kconfig"
1335
1336 source "drivers/pcmcia/Kconfig"
1337
1338 endmenu
1339
1340 menu "Kernel Features"
1341
1342 source "kernel/time/Kconfig"
1343
1344 config SMP
1345         bool "Symmetric Multi-Processing"
1346         depends on CPU_V6K || CPU_V7
1347         depends on GENERIC_CLOCKEVENTS
1348         depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
1349                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
1350                  ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
1351                  ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
1352         select USE_GENERIC_SMP_HELPERS
1353         select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
1354         help
1355           This enables support for systems with more than one CPU. If you have
1356           a system with only one CPU, like most personal computers, say N. If
1357           you have a system with more than one CPU, say Y.
1358
1359           If you say N here, the kernel will run on single and multiprocessor
1360           machines, but will use only one CPU of a multiprocessor machine. If
1361           you say Y here, the kernel will run on many, but not all, single
1362           processor machines. On a single processor machine, the kernel will
1363           run faster if you say N here.
1364
1365           See also <file:Documentation/i386/IO-APIC.txt>,
1366           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1367           <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1368
1369           If you don't know what to do here, say N.
1370
1371 config SMP_ON_UP
1372         bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1373         depends on EXPERIMENTAL
1374         depends on SMP && !XIP_KERNEL
1375         default y
1376         help
1377           SMP kernels contain instructions which fail on non-SMP processors.
1378           Enabling this option allows the kernel to modify itself to make
1379           these instructions safe.  Disabling it allows about 1K of space
1380           savings.
1381
1382           If you don't know what to do here, say Y.
1383
1384 config HAVE_ARM_SCU
1385         bool
1386         help
1387           This option enables support for the ARM system coherency unit
1388
1389 config HAVE_ARM_TWD
1390         bool
1391         depends on SMP
1392         select TICK_ONESHOT
1393         help
1394           This options enables support for the ARM timer and watchdog unit
1395
1396 choice
1397         prompt "Memory split"
1398         default VMSPLIT_3G
1399         help
1400           Select the desired split between kernel and user memory.
1401
1402           If you are not absolutely sure what you are doing, leave this
1403           option alone!
1404
1405         config VMSPLIT_3G
1406                 bool "3G/1G user/kernel split"
1407         config VMSPLIT_2G
1408                 bool "2G/2G user/kernel split"
1409         config VMSPLIT_1G
1410                 bool "1G/3G user/kernel split"
1411 endchoice
1412
1413 config PAGE_OFFSET
1414         hex
1415         default 0x40000000 if VMSPLIT_1G
1416         default 0x80000000 if VMSPLIT_2G
1417         default 0xC0000000
1418
1419 config NR_CPUS
1420         int "Maximum number of CPUs (2-32)"
1421         range 2 32
1422         depends on SMP
1423         default "4"
1424
1425 config HOTPLUG_CPU
1426         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1427         depends on SMP && HOTPLUG && EXPERIMENTAL
1428         help
1429           Say Y here to experiment with turning CPUs off and on.  CPUs
1430           can be controlled through /sys/devices/system/cpu.
1431
1432 config LOCAL_TIMERS
1433         bool "Use local timer interrupts"
1434         depends on SMP
1435         default y
1436         select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
1437         help
1438           Enable support for local timers on SMP platforms, rather then the
1439           legacy IPI broadcast method.  Local timers allows the system
1440           accounting to be spread across the timer interval, preventing a
1441           "thundering herd" at every timer tick.
1442
1443 source kernel/Kconfig.preempt
1444
1445 config HZ
1446         int
1447         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
1448                 ARCH_S5PV210 || ARCH_EXYNOS4
1449         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1450         default AT91_TIMER_HZ if ARCH_AT91
1451         default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1452         default 100
1453
1454 config THUMB2_KERNEL
1455         bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
1456         depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
1457         select AEABI
1458         select ARM_ASM_UNIFIED
1459         help
1460           By enabling this option, the kernel will be compiled in
1461           Thumb-2 mode. A compiler/assembler that understand the unified
1462           ARM-Thumb syntax is needed.
1463
1464           If unsure, say N.
1465
1466 config THUMB2_AVOID_R_ARM_THM_JUMP11
1467         bool "Work around buggy Thumb-2 short branch relocations in gas"
1468         depends on THUMB2_KERNEL && MODULES
1469         default y
1470         help
1471           Various binutils versions can resolve Thumb-2 branches to
1472           locally-defined, preemptible global symbols as short-range "b.n"
1473           branch instructions.
1474
1475           This is a problem, because there's no guarantee the final
1476           destination of the symbol, or any candidate locations for a
1477           trampoline, are within range of the branch.  For this reason, the
1478           kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1479           relocation in modules at all, and it makes little sense to add
1480           support.
1481
1482           The symptom is that the kernel fails with an "unsupported
1483           relocation" error when loading some modules.
1484
1485           Until fixed tools are available, passing
1486           -fno-optimize-sibling-calls to gcc should prevent gcc generating
1487           code which hits this problem, at the cost of a bit of extra runtime
1488           stack usage in some cases.
1489
1490           The problem is described in more detail at:
1491               https://bugs.launchpad.net/binutils-linaro/+bug/725126
1492
1493           Only Thumb-2 kernels are affected.
1494
1495           Unless you are sure your tools don't have this problem, say Y.
1496
1497 config ARM_ASM_UNIFIED
1498         bool
1499
1500 config AEABI
1501         bool "Use the ARM EABI to compile the kernel"
1502         help
1503           This option allows for the kernel to be compiled using the latest
1504           ARM ABI (aka EABI).  This is only useful if you are using a user
1505           space environment that is also compiled with EABI.
1506
1507           Since there are major incompatibilities between the legacy ABI and
1508           EABI, especially with regard to structure member alignment, this
1509           option also changes the kernel syscall calling convention to
1510           disambiguate both ABIs and allow for backward compatibility support
1511           (selected with CONFIG_OABI_COMPAT).
1512
1513           To use this you need GCC version 4.0.0 or later.
1514
1515 config OABI_COMPAT
1516         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1517         depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
1518         default y
1519         help
1520           This option preserves the old syscall interface along with the
1521           new (ARM EABI) one. It also provides a compatibility layer to
1522           intercept syscalls that have structure arguments which layout
1523           in memory differs between the legacy ABI and the new ARM EABI
1524           (only for non "thumb" binaries). This option adds a tiny
1525           overhead to all syscalls and produces a slightly larger kernel.
1526           If you know you'll be using only pure EABI user space then you
1527           can say N here. If this option is not selected and you attempt
1528           to execute a legacy ABI binary then the result will be
1529           UNPREDICTABLE (in fact it can be predicted that it won't work
1530           at all). If in doubt say Y.
1531
1532 config ARCH_HAS_HOLES_MEMORYMODEL
1533         bool
1534
1535 config ARCH_SPARSEMEM_ENABLE
1536         bool
1537
1538 config ARCH_SPARSEMEM_DEFAULT
1539         def_bool ARCH_SPARSEMEM_ENABLE
1540
1541 config ARCH_SELECT_MEMORY_MODEL
1542         def_bool ARCH_SPARSEMEM_ENABLE
1543
1544 config HAVE_ARCH_PFN_VALID
1545         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1546
1547 config HIGHMEM
1548         bool "High Memory Support"
1549         depends on MMU
1550         help
1551           The address space of ARM processors is only 4 Gigabytes large
1552           and it has to accommodate user address space, kernel address
1553           space as well as some memory mapped IO. That means that, if you
1554           have a large amount of physical memory and/or IO, not all of the
1555           memory can be "permanently mapped" by the kernel. The physical
1556           memory that is not permanently mapped is called "high memory".
1557
1558           Depending on the selected kernel/user memory split, minimum
1559           vmalloc space and actual amount of RAM, you may not need this
1560           option which should result in a slightly faster kernel.
1561
1562           If unsure, say n.
1563
1564 config HIGHPTE
1565         bool "Allocate 2nd-level pagetables from highmem"
1566         depends on HIGHMEM
1567
1568 config HW_PERF_EVENTS
1569         bool "Enable hardware performance counter support for perf events"
1570         depends on PERF_EVENTS && CPU_HAS_PMU
1571         default y
1572         help
1573           Enable hardware performance counter support for perf events. If
1574           disabled, perf events will use software events only.
1575
1576 source "mm/Kconfig"
1577
1578 config FORCE_MAX_ZONEORDER
1579         int "Maximum zone order" if ARCH_SHMOBILE
1580         range 11 64 if ARCH_SHMOBILE
1581         default "9" if SA1111
1582         default "11"
1583         help
1584           The kernel memory allocator divides physically contiguous memory
1585           blocks into "zones", where each zone is a power of two number of
1586           pages.  This option selects the largest power of two that the kernel
1587           keeps in the memory allocator.  If you need to allocate very large
1588           blocks of physically contiguous memory, then you may need to
1589           increase this value.
1590
1591           This config option is actually maximum order plus one. For example,
1592           a value of 11 means that the largest free memory block is 2^10 pages.
1593
1594 config LEDS
1595         bool "Timer and CPU usage LEDs"
1596         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1597                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1598                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1599                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1600                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1601                    ARCH_AT91 || ARCH_DAVINCI || \
1602                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1603         help
1604           If you say Y here, the LEDs on your machine will be used
1605           to provide useful information about your current system status.
1606
1607           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1608           be able to select which LEDs are active using the options below. If
1609           you are compiling a kernel for the EBSA-110 or the LART however, the
1610           red LED will simply flash regularly to indicate that the system is
1611           still functional. It is safe to say Y here if you have a CATS
1612           system, but the driver will do nothing.
1613
1614 config LEDS_TIMER
1615         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1616                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1617                             || MACH_OMAP_PERSEUS2
1618         depends on LEDS
1619         depends on !GENERIC_CLOCKEVENTS
1620         default y if ARCH_EBSA110
1621         help
1622           If you say Y here, one of the system LEDs (the green one on the
1623           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1624           will flash regularly to indicate that the system is still
1625           operational. This is mainly useful to kernel hackers who are
1626           debugging unstable kernels.
1627
1628           The LART uses the same LED for both Timer LED and CPU usage LED
1629           functions. You may choose to use both, but the Timer LED function
1630           will overrule the CPU usage LED.
1631
1632 config LEDS_CPU
1633         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1634                         !ARCH_OMAP) \
1635                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1636                         || MACH_OMAP_PERSEUS2
1637         depends on LEDS
1638         help
1639           If you say Y here, the red LED will be used to give a good real
1640           time indication of CPU usage, by lighting whenever the idle task
1641           is not currently executing.
1642
1643           The LART uses the same LED for both Timer LED and CPU usage LED
1644           functions. You may choose to use both, but the Timer LED function
1645           will overrule the CPU usage LED.
1646
1647 config ALIGNMENT_TRAP
1648         bool
1649         depends on CPU_CP15_MMU
1650         default y if !ARCH_EBSA110
1651         select HAVE_PROC_CPU if PROC_FS
1652         help
1653           ARM processors cannot fetch/store information which is not
1654           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1655           address divisible by 4. On 32-bit ARM processors, these non-aligned
1656           fetch/store instructions will be emulated in software if you say
1657           here, which has a severe performance impact. This is necessary for
1658           correct operation of some network protocols. With an IP-only
1659           configuration it is safe to say N, otherwise say Y.
1660
1661 config UACCESS_WITH_MEMCPY
1662         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1663         depends on MMU && EXPERIMENTAL
1664         default y if CPU_FEROCEON
1665         help
1666           Implement faster copy_to_user and clear_user methods for CPU
1667           cores where a 8-word STM instruction give significantly higher
1668           memory write throughput than a sequence of individual 32bit stores.
1669
1670           A possible side effect is a slight increase in scheduling latency
1671           between threads sharing the same address space if they invoke
1672           such copy operations with large buffers.
1673
1674           However, if the CPU data cache is using a write-allocate mode,
1675           this option is unlikely to provide any performance gain.
1676
1677 config SECCOMP
1678         bool
1679         prompt "Enable seccomp to safely compute untrusted bytecode"
1680         ---help---
1681           This kernel feature is useful for number crunching applications
1682           that may need to compute untrusted bytecode during their
1683           execution. By using pipes or other transports made available to
1684           the process as file descriptors supporting the read/write
1685           syscalls, it's possible to isolate those applications in
1686           their own address space using seccomp. Once seccomp is
1687           enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1688           and the task is only allowed to execute a few safe syscalls
1689           defined by each seccomp mode.
1690
1691 config CC_STACKPROTECTOR
1692         bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1693         depends on EXPERIMENTAL
1694         help
1695           This option turns on the -fstack-protector GCC feature. This
1696           feature puts, at the beginning of functions, a canary value on
1697           the stack just before the return address, and validates
1698           the value just before actually returning.  Stack based buffer
1699           overflows (that need to overwrite this return address) now also
1700           overwrite the canary, which gets detected and the attack is then
1701           neutralized via a kernel panic.
1702           This feature requires gcc version 4.2 or above.
1703
1704 config DEPRECATED_PARAM_STRUCT
1705         bool "Provide old way to pass kernel parameters"
1706         help
1707           This was deprecated in 2001 and announced to live on for 5 years.
1708           Some old boot loaders still use this way.
1709
1710 endmenu
1711
1712 menu "Boot options"
1713
1714 config USE_OF
1715         bool "Flattened Device Tree support"
1716         select OF
1717         select OF_EARLY_FLATTREE
1718         select IRQ_DOMAIN
1719         help
1720           Include support for flattened device tree machine descriptions.
1721
1722 # Compressed boot loader in ROM.  Yes, we really want to ask about
1723 # TEXT and BSS so we preserve their values in the config files.
1724 config ZBOOT_ROM_TEXT
1725         hex "Compressed ROM boot loader base address"
1726         default "0"
1727         help
1728           The physical address at which the ROM-able zImage is to be
1729           placed in the target.  Platforms which normally make use of
1730           ROM-able zImage formats normally set this to a suitable
1731           value in their defconfig file.
1732
1733           If ZBOOT_ROM is not enabled, this has no effect.
1734
1735 config ZBOOT_ROM_BSS
1736         hex "Compressed ROM boot loader BSS address"
1737         default "0"
1738         help
1739           The base address of an area of read/write memory in the target
1740           for the ROM-able zImage which must be available while the
1741           decompressor is running. It must be large enough to hold the
1742           entire decompressed kernel plus an additional 128 KiB.
1743           Platforms which normally make use of ROM-able zImage formats
1744           normally set this to a suitable value in their defconfig file.
1745
1746           If ZBOOT_ROM is not enabled, this has no effect.
1747
1748 config ZBOOT_ROM
1749         bool "Compressed boot loader in ROM/flash"
1750         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1751         help
1752           Say Y here if you intend to execute your compressed kernel image
1753           (zImage) directly from ROM or flash.  If unsure, say N.
1754
1755 choice
1756         prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1757         depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
1758         default ZBOOT_ROM_NONE
1759         help
1760           Include experimental SD/MMC loading code in the ROM-able zImage.
1761           With this enabled it is possible to write the the ROM-able zImage
1762           kernel image to an MMC or SD card and boot the kernel straight
1763           from the reset vector. At reset the processor Mask ROM will load
1764           the first part of the the ROM-able zImage which in turn loads the
1765           rest the kernel image to RAM.
1766
1767 config ZBOOT_ROM_NONE
1768         bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1769         help
1770           Do not load image from SD or MMC
1771
1772 config ZBOOT_ROM_MMCIF
1773         bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
1774         help
1775           Load image from MMCIF hardware block.
1776
1777 config ZBOOT_ROM_SH_MOBILE_SDHI
1778         bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1779         help
1780           Load image from SDHI hardware block
1781
1782 endchoice
1783
1784 config CMDLINE
1785         string "Default kernel command string"
1786         default ""
1787         help
1788           On some architectures (EBSA110 and CATS), there is currently no way
1789           for the boot loader to pass arguments to the kernel. For these
1790           architectures, you should supply some command-line options at build
1791           time by entering them here. As a minimum, you should specify the
1792           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1793
1794 choice
1795         prompt "Kernel command line type" if CMDLINE != ""
1796         default CMDLINE_FROM_BOOTLOADER
1797
1798 config CMDLINE_FROM_BOOTLOADER
1799         bool "Use bootloader kernel arguments if available"
1800         help
1801           Uses the command-line options passed by the boot loader. If
1802           the boot loader doesn't provide any, the default kernel command
1803           string provided in CMDLINE will be used.
1804
1805 config CMDLINE_EXTEND
1806         bool "Extend bootloader kernel arguments"
1807         help
1808           The command-line arguments provided by the boot loader will be
1809           appended to the default kernel command string.
1810
1811 config CMDLINE_FORCE
1812         bool "Always use the default kernel command string"
1813         help
1814           Always use the default kernel command string, even if the boot
1815           loader passes other arguments to the kernel.
1816           This is useful if you cannot or don't want to change the
1817           command-line options your boot loader passes to the kernel.
1818 endchoice
1819
1820 config XIP_KERNEL
1821         bool "Kernel Execute-In-Place from ROM"
1822         depends on !ZBOOT_ROM
1823         help
1824           Execute-In-Place allows the kernel to run from non-volatile storage
1825           directly addressable by the CPU, such as NOR flash. This saves RAM
1826           space since the text section of the kernel is not loaded from flash
1827           to RAM.  Read-write sections, such as the data section and stack,
1828           are still copied to RAM.  The XIP kernel is not compressed since
1829           it has to run directly from flash, so it will take more space to
1830           store it.  The flash address used to link the kernel object files,
1831           and for storing it, is configuration dependent. Therefore, if you
1832           say Y here, you must know the proper physical address where to
1833           store the kernel image depending on your own flash memory usage.
1834
1835           Also note that the make target becomes "make xipImage" rather than
1836           "make zImage" or "make Image".  The final kernel binary to put in
1837           ROM memory will be arch/arm/boot/xipImage.
1838
1839           If unsure, say N.
1840
1841 config XIP_PHYS_ADDR
1842         hex "XIP Kernel Physical Location"
1843         depends on XIP_KERNEL
1844         default "0x00080000"
1845         help
1846           This is the physical address in your flash memory the kernel will
1847           be linked for and stored to.  This address is dependent on your
1848           own flash usage.
1849
1850 config KEXEC
1851         bool "Kexec system call (EXPERIMENTAL)"
1852         depends on EXPERIMENTAL
1853         help
1854           kexec is a system call that implements the ability to shutdown your
1855           current kernel, and to start another kernel.  It is like a reboot
1856           but it is independent of the system firmware.   And like a reboot
1857           you can start any kernel with it, not just Linux.
1858
1859           It is an ongoing process to be certain the hardware in a machine
1860           is properly shutdown, so do not be surprised if this code does not
1861           initially work for you.  It may help to enable device hotplugging
1862           support.
1863
1864 config ATAGS_PROC
1865         bool "Export atags in procfs"
1866         depends on KEXEC
1867         default y
1868         help
1869           Should the atags used to boot the kernel be exported in an "atags"
1870           file in procfs. Useful with kexec.
1871
1872 config CRASH_DUMP
1873         bool "Build kdump crash kernel (EXPERIMENTAL)"
1874         depends on EXPERIMENTAL
1875         help
1876           Generate crash dump after being started by kexec. This should
1877           be normally only set in special crash dump kernels which are
1878           loaded in the main kernel with kexec-tools into a specially
1879           reserved region and then later executed after a crash by
1880           kdump/kexec. The crash dump kernel must be compiled to a
1881           memory address not used by the main kernel
1882
1883           For more details see Documentation/kdump/kdump.txt
1884
1885 config AUTO_ZRELADDR
1886         bool "Auto calculation of the decompressed kernel image address"
1887         depends on !ZBOOT_ROM && !ARCH_U300
1888         help
1889           ZRELADDR is the physical address where the decompressed kernel
1890           image will be placed. If AUTO_ZRELADDR is selected, the address
1891           will be determined at run-time by masking the current IP with
1892           0xf8000000. This assumes the zImage being placed in the first 128MB
1893           from start of memory.
1894
1895 endmenu
1896
1897 menu "CPU Power Management"
1898
1899 if ARCH_HAS_CPUFREQ
1900
1901 source "drivers/cpufreq/Kconfig"
1902
1903 config CPU_FREQ_IMX
1904         tristate "CPUfreq driver for i.MX CPUs"
1905         depends on ARCH_MXC && CPU_FREQ
1906         help
1907           This enables the CPUfreq driver for i.MX CPUs.
1908
1909 config CPU_FREQ_SA1100
1910         bool
1911
1912 config CPU_FREQ_SA1110
1913         bool
1914
1915 config CPU_FREQ_INTEGRATOR
1916         tristate "CPUfreq driver for ARM Integrator CPUs"
1917         depends on ARCH_INTEGRATOR && CPU_FREQ
1918         default y
1919         help
1920           This enables the CPUfreq driver for ARM Integrator CPUs.
1921
1922           For details, take a look at <file:Documentation/cpu-freq>.
1923
1924           If in doubt, say Y.
1925
1926 config CPU_FREQ_PXA
1927         bool
1928         depends on CPU_FREQ && ARCH_PXA && PXA25x
1929         default y
1930         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1931
1932 config CPU_FREQ_S3C
1933         bool
1934         help
1935           Internal configuration node for common cpufreq on Samsung SoC
1936
1937 config CPU_FREQ_S3C24XX
1938         bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
1939         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1940         select CPU_FREQ_S3C
1941         help
1942           This enables the CPUfreq driver for the Samsung S3C24XX family
1943           of CPUs.
1944
1945           For details, take a look at <file:Documentation/cpu-freq>.
1946
1947           If in doubt, say N.
1948
1949 config CPU_FREQ_S3C24XX_PLL
1950         bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
1951         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1952         help
1953           Compile in support for changing the PLL frequency from the
1954           S3C24XX series CPUfreq driver. The PLL takes time to settle
1955           after a frequency change, so by default it is not enabled.
1956
1957           This also means that the PLL tables for the selected CPU(s) will
1958           be built which may increase the size of the kernel image.
1959
1960 config CPU_FREQ_S3C24XX_DEBUG
1961         bool "Debug CPUfreq Samsung driver core"
1962         depends on CPU_FREQ_S3C24XX
1963         help
1964           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1965
1966 config CPU_FREQ_S3C24XX_IODEBUG
1967         bool "Debug CPUfreq Samsung driver IO timing"
1968         depends on CPU_FREQ_S3C24XX
1969         help
1970           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1971
1972 config CPU_FREQ_S3C24XX_DEBUGFS
1973         bool "Export debugfs for CPUFreq"
1974         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1975         help
1976           Export status information via debugfs.
1977
1978 endif
1979
1980 source "drivers/cpuidle/Kconfig"
1981
1982 endmenu
1983
1984 menu "Floating point emulation"
1985
1986 comment "At least one emulation must be selected"
1987
1988 config FPE_NWFPE
1989         bool "NWFPE math emulation"
1990         depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
1991         ---help---
1992           Say Y to include the NWFPE floating point emulator in the kernel.
1993           This is necessary to run most binaries. Linux does not currently
1994           support floating point hardware so you need to say Y here even if
1995           your machine has an FPA or floating point co-processor podule.
1996
1997           You may say N here if you are going to load the Acorn FPEmulator
1998           early in the bootup.
1999
2000 config FPE_NWFPE_XP
2001         bool "Support extended precision"
2002         depends on FPE_NWFPE
2003         help
2004           Say Y to include 80-bit support in the kernel floating-point
2005           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
2006           Note that gcc does not generate 80-bit operations by default,
2007           so in most cases this option only enlarges the size of the
2008           floating point emulator without any good reason.
2009
2010           You almost surely want to say N here.
2011
2012 config FPE_FASTFPE
2013         bool "FastFPE math emulation (EXPERIMENTAL)"
2014         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
2015         ---help---
2016           Say Y here to include the FAST floating point emulator in the kernel.
2017           This is an experimental much faster emulator which now also has full
2018           precision for the mantissa.  It does not support any exceptions.
2019           It is very simple, and approximately 3-6 times faster than NWFPE.
2020
2021           It should be sufficient for most programs.  It may be not suitable
2022           for scientific calculations, but you have to check this for yourself.
2023           If you do not feel you need a faster FP emulation you should better
2024           choose NWFPE.
2025
2026 config VFP
2027         bool "VFP-format floating point maths"
2028         depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
2029         help
2030           Say Y to include VFP support code in the kernel. This is needed
2031           if your hardware includes a VFP unit.
2032
2033           Please see <file:Documentation/arm/VFP/release-notes.txt> for
2034           release notes and additional status information.
2035
2036           Say N if your target does not have VFP hardware.
2037
2038 config VFPv3
2039         bool
2040         depends on VFP
2041         default y if CPU_V7
2042
2043 config NEON
2044         bool "Advanced SIMD (NEON) Extension support"
2045         depends on VFPv3 && CPU_V7
2046         help
2047           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2048           Extension.
2049
2050 endmenu
2051
2052 menu "Userspace binary formats"
2053
2054 source "fs/Kconfig.binfmt"
2055
2056 config ARTHUR
2057         tristate "RISC OS personality"
2058         depends on !AEABI
2059         help
2060           Say Y here to include the kernel code necessary if you want to run
2061           Acorn RISC OS/Arthur binaries under Linux. This code is still very
2062           experimental; if this sounds frightening, say N and sleep in peace.
2063           You can also say M here to compile this support as a module (which
2064           will be called arthur).
2065
2066 endmenu
2067
2068 menu "Power management options"
2069
2070 source "kernel/power/Kconfig"
2071
2072 config ARCH_SUSPEND_POSSIBLE
2073         depends on !ARCH_S5P64X0 && !ARCH_S5PC100
2074         depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
2075                 CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
2076         def_bool y
2077
2078 endmenu
2079
2080 source "net/Kconfig"
2081
2082 source "drivers/Kconfig"
2083
2084 source "fs/Kconfig"
2085
2086 source "arch/arm/Kconfig.debug"
2087
2088 source "security/Kconfig"
2089
2090 source "crypto/Kconfig"
2091
2092 source "lib/Kconfig"