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" if EMBEDDED
 199         default y
 200         depends on !XIP_KERNEL && MMU
 201         depends on !ARCH_REALVIEW || !SPARSEMEM
 202         help
 203           Patch phys-to-virt and virt-to-phys translation functions at
 204           boot and module load time according to the position of the
 205           kernel in system memory.
 206
 207           This can only be used with non-XIP MMU kernels where the base
 208           of physical memory is at a 16MB boundary.
 209
 210           Only disable this option if you know that you do not require
 211           this feature (eg, building a kernel for a single machine) and
 212           you need to shrink the kernel to the minimal size.
 213
 214 config NO_MACH_MEMORY_H
 215         bool
 216         help
 217           Select this when mach/memory.h is removed.
 218
 219 config PHYS_OFFSET
 220         hex "Physical address of main memory"
 221         depends on !ARM_PATCH_PHYS_VIRT && NO_MACH_MEMORY_H
 222         help
 223           Please provide the physical address corresponding to the
 224           location of main memory in your system.
 225
 226 source "init/Kconfig"
 227
 228 source "kernel/Kconfig.freezer"
 229
 230 menu "System Type"
 231
 232 config MMU
 233         bool "MMU-based Paged Memory Management Support"
 234         default y
 235         help
 236           Select if you want MMU-based virtualised addressing space
 237           support by paged memory management. If unsure, say 'Y'.
 238
 239 #
 240 # The "ARM system type" choice list is ordered alphabetically by option
 241 # text.  Please add new entries in the option alphabetic order.
 242 #
 243 choice
 244         prompt "ARM system type"
 245         default ARCH_VERSATILE
 246
 247 config ARCH_INTEGRATOR
 248         bool "ARM Ltd. Integrator family"
 249         select ARM_AMBA
 250         select ARCH_HAS_CPUFREQ
 251         select CLKDEV_LOOKUP
 252         select HAVE_MACH_CLKDEV
 253         select ICST
 254         select GENERIC_CLOCKEVENTS
 255         select PLAT_VERSATILE
 256         select PLAT_VERSATILE_FPGA_IRQ
 257         help
 258           Support for ARM's Integrator platform.
 259
 260 config ARCH_REALVIEW
 261         bool "ARM Ltd. RealView family"
 262         select ARM_AMBA
 263         select CLKDEV_LOOKUP
 264         select HAVE_MACH_CLKDEV
 265         select ICST
 266         select GENERIC_CLOCKEVENTS
 267         select ARCH_WANT_OPTIONAL_GPIOLIB
 268         select PLAT_VERSATILE
 269         select PLAT_VERSATILE_CLCD
 270         select ARM_TIMER_SP804
 271         select GPIO_PL061 if GPIOLIB
 272         help
 273           This enables support for ARM Ltd RealView boards.
 274
 275 config ARCH_VERSATILE
 276         bool "ARM Ltd. Versatile family"
 277         select ARM_AMBA
 278         select ARM_VIC
 279         select CLKDEV_LOOKUP
 280         select HAVE_MACH_CLKDEV
 281         select ICST
 282         select GENERIC_CLOCKEVENTS
 283         select ARCH_WANT_OPTIONAL_GPIOLIB
 284         select PLAT_VERSATILE
 285         select PLAT_VERSATILE_CLCD
 286         select PLAT_VERSATILE_FPGA_IRQ
 287         select ARM_TIMER_SP804
 288         help
 289           This enables support for ARM Ltd Versatile board.
 290
 291 config ARCH_VEXPRESS
 292         bool "ARM Ltd. Versatile Express family"
 293         select ARCH_WANT_OPTIONAL_GPIOLIB
 294         select ARM_AMBA
 295         select ARM_TIMER_SP804
 296         select CLKDEV_LOOKUP
 297         select HAVE_MACH_CLKDEV
 298         select GENERIC_CLOCKEVENTS
 299         select HAVE_CLK
 300         select HAVE_PATA_PLATFORM
 301         select ICST
 302         select PLAT_VERSATILE
 303         select PLAT_VERSATILE_CLCD
 304         help
 305           This enables support for the ARM Ltd Versatile Express boards.
 306
 307 config ARCH_AT91
 308         bool "Atmel AT91"
 309         select ARCH_REQUIRE_GPIOLIB
 310         select HAVE_CLK
 311         select CLKDEV_LOOKUP
 312         help
 313           This enables support for systems based on the Atmel AT91RM9200,
 314           AT91SAM9 and AT91CAP9 processors.
 315
 316 config ARCH_BCMRING
 317         bool "Broadcom BCMRING"
 318         depends on MMU
 319         select CPU_V6
 320         select ARM_AMBA
 321         select ARM_TIMER_SP804
 322         select CLKDEV_LOOKUP
 323         select GENERIC_CLOCKEVENTS
 324         select ARCH_WANT_OPTIONAL_GPIOLIB
 325         help
 326           Support for Broadcom's BCMRing platform.
 327
 328 config ARCH_CLPS711X
 329         bool "Cirrus Logic CLPS711x/EP721x-based"
 330         select CPU_ARM720T
 331         select ARCH_USES_GETTIMEOFFSET
 332         help
 333           Support for Cirrus Logic 711x/721x based boards.
 334
 335 config ARCH_CNS3XXX
 336         bool "Cavium Networks CNS3XXX family"
 337         select CPU_V6K
 338         select GENERIC_CLOCKEVENTS
 339         select ARM_GIC
 340         select MIGHT_HAVE_PCI
 341         select PCI_DOMAINS if PCI
 342         help
 343           Support for Cavium Networks CNS3XXX platform.
 344
 345 config ARCH_GEMINI
 346         bool "Cortina Systems Gemini"
 347         select CPU_FA526
 348         select ARCH_REQUIRE_GPIOLIB
 349         select ARCH_USES_GETTIMEOFFSET
 350         help
 351           Support for the Cortina Systems Gemini family SoCs
 352
 353 config ARCH_PRIMA2
 354         bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
 355         select CPU_V7
 356         select GENERIC_TIME
 357         select NO_IOPORT
 358         select GENERIC_CLOCKEVENTS
 359         select CLKDEV_LOOKUP
 360         select GENERIC_IRQ_CHIP
 361         select USE_OF
 362         select ZONE_DMA
 363         help
 364           Support for CSR SiRFSoC ARM Cortex A9 Platform
 365
 366 config ARCH_EBSA110
 367         bool "EBSA-110"
 368         select CPU_SA110
 369         select ISA
 370         select NO_IOPORT
 371         select ARCH_USES_GETTIMEOFFSET
 372         help
 373           This is an evaluation board for the StrongARM processor available
 374           from Digital. It has limited hardware on-board, including an
 375           Ethernet interface, two PCMCIA sockets, two serial ports and a
 376           parallel port.
 377
 378 config ARCH_EP93XX
 379         bool "EP93xx-based"
 380         select CPU_ARM920T
 381         select ARM_AMBA
 382         select ARM_VIC
 383         select CLKDEV_LOOKUP
 384         select ARCH_REQUIRE_GPIOLIB
 385         select ARCH_HAS_HOLES_MEMORYMODEL
 386         select ARCH_USES_GETTIMEOFFSET
 387         help
 388           This enables support for the Cirrus EP93xx series of CPUs.
 389
 390 config ARCH_FOOTBRIDGE
 391         bool "FootBridge"
 392         select CPU_SA110
 393         select FOOTBRIDGE
 394         select GENERIC_CLOCKEVENTS
 395         help
 396           Support for systems based on the DC21285 companion chip
 397           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 398
 399 config ARCH_MXC
 400         bool "Freescale MXC/iMX-based"
 401         select GENERIC_CLOCKEVENTS
 402         select ARCH_REQUIRE_GPIOLIB
 403         select CLKDEV_LOOKUP
 404         select CLKSRC_MMIO
 405         select GENERIC_IRQ_CHIP
 406         select HAVE_SCHED_CLOCK
 407         help
 408           Support for Freescale MXC/iMX-based family of processors
 409
 410 config ARCH_MXS
 411         bool "Freescale MXS-based"
 412         select GENERIC_CLOCKEVENTS
 413         select ARCH_REQUIRE_GPIOLIB
 414         select CLKDEV_LOOKUP
 415         select CLKSRC_MMIO
 416         help
 417           Support for Freescale MXS-based family of processors
 418
 419 config ARCH_NETX
 420         bool "Hilscher NetX based"
 421         select CLKSRC_MMIO
 422         select CPU_ARM926T
 423         select ARM_VIC
 424         select GENERIC_CLOCKEVENTS
 425         help
 426           This enables support for systems based on the Hilscher NetX Soc
 427
 428 config ARCH_H720X
 429         bool "Hynix HMS720x-based"
 430         select CPU_ARM720T
 431         select ISA_DMA_API
 432         select ARCH_USES_GETTIMEOFFSET
 433         help
 434           This enables support for systems based on the Hynix HMS720x
 435
 436 config ARCH_IOP13XX
 437         bool "IOP13xx-based"
 438         depends on MMU
 439         select CPU_XSC3
 440         select PLAT_IOP
 441         select PCI
 442         select ARCH_SUPPORTS_MSI
 443         select VMSPLIT_1G
 444         help
 445           Support for Intel's IOP13XX (XScale) family of processors.
 446
 447 config ARCH_IOP32X
 448         bool "IOP32x-based"
 449         depends on MMU
 450         select CPU_XSCALE
 451         select PLAT_IOP
 452         select PCI
 453         select ARCH_REQUIRE_GPIOLIB
 454         help
 455           Support for Intel's 80219 and IOP32X (XScale) family of
 456           processors.
 457
 458 config ARCH_IOP33X
 459         bool "IOP33x-based"
 460         depends on MMU
 461         select CPU_XSCALE
 462         select PLAT_IOP
 463         select PCI
 464         select ARCH_REQUIRE_GPIOLIB
 465         help
 466           Support for Intel's IOP33X (XScale) family of processors.
 467
 468 config ARCH_IXP23XX
 469         bool "IXP23XX-based"
 470         depends on MMU
 471         select CPU_XSC3
 472         select PCI
 473         select ARCH_USES_GETTIMEOFFSET
 474         help
 475           Support for Intel's IXP23xx (XScale) family of processors.
 476
 477 config ARCH_IXP2000
 478         bool "IXP2400/2800-based"
 479         depends on MMU
 480         select CPU_XSCALE
 481         select PCI
 482         select ARCH_USES_GETTIMEOFFSET
 483         help
 484           Support for Intel's IXP2400/2800 (XScale) family of processors.
 485
 486 config ARCH_IXP4XX
 487         bool "IXP4xx-based"
 488         depends on MMU
 489         select CLKSRC_MMIO
 490         select CPU_XSCALE
 491         select GENERIC_GPIO
 492         select GENERIC_CLOCKEVENTS
 493         select HAVE_SCHED_CLOCK
 494         select MIGHT_HAVE_PCI
 495         select DMABOUNCE if PCI
 496         help
 497           Support for Intel's IXP4XX (XScale) family of processors.
 498
 499 config ARCH_DOVE
 500         bool "Marvell Dove"
 501         select CPU_V7
 502         select PCI
 503         select ARCH_REQUIRE_GPIOLIB
 504         select GENERIC_CLOCKEVENTS
 505         select PLAT_ORION
 506         help
 507           Support for the Marvell Dove SoC 88AP510
 508
 509 config ARCH_KIRKWOOD
 510         bool "Marvell Kirkwood"
 511         select CPU_FEROCEON
 512         select PCI
 513         select ARCH_REQUIRE_GPIOLIB
 514         select GENERIC_CLOCKEVENTS
 515         select PLAT_ORION
 516         help
 517           Support for the following Marvell Kirkwood series SoCs:
 518           88F6180, 88F6192 and 88F6281.
 519
 520 config ARCH_LPC32XX
 521         bool "NXP LPC32XX"
 522         select CLKSRC_MMIO
 523         select CPU_ARM926T
 524         select ARCH_REQUIRE_GPIOLIB
 525         select HAVE_IDE
 526         select ARM_AMBA
 527         select USB_ARCH_HAS_OHCI
 528         select CLKDEV_LOOKUP
 529         select GENERIC_TIME
 530         select GENERIC_CLOCKEVENTS
 531         help
 532           Support for the NXP LPC32XX family of processors
 533
 534 config ARCH_MV78XX0
 535         bool "Marvell MV78xx0"
 536         select CPU_FEROCEON
 537         select PCI
 538         select ARCH_REQUIRE_GPIOLIB
 539         select GENERIC_CLOCKEVENTS
 540         select PLAT_ORION
 541         help
 542           Support for the following Marvell MV78xx0 series SoCs:
 543           MV781x0, MV782x0.
 544
 545 config ARCH_ORION5X
 546         bool "Marvell Orion"
 547         depends on MMU
 548         select CPU_FEROCEON
 549         select PCI
 550         select ARCH_REQUIRE_GPIOLIB
 551         select GENERIC_CLOCKEVENTS
 552         select PLAT_ORION
 553         help
 554           Support for the following Marvell Orion 5x series SoCs:
 555           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 556           Orion-2 (5281), Orion-1-90 (6183).
 557
 558 config ARCH_MMP
 559         bool "Marvell PXA168/910/MMP2"
 560         depends on MMU
 561         select ARCH_REQUIRE_GPIOLIB
 562         select CLKDEV_LOOKUP
 563         select GENERIC_CLOCKEVENTS
 564         select HAVE_SCHED_CLOCK
 565         select TICK_ONESHOT
 566         select PLAT_PXA
 567         select SPARSE_IRQ
 568         help
 569           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 570
 571 config ARCH_KS8695
 572         bool "Micrel/Kendin KS8695"
 573         select CPU_ARM922T
 574         select ARCH_REQUIRE_GPIOLIB
 575         select ARCH_USES_GETTIMEOFFSET
 576         help
 577           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 578           System-on-Chip devices.
 579
 580 config ARCH_W90X900
 581         bool "Nuvoton W90X900 CPU"
 582         select CPU_ARM926T
 583         select ARCH_REQUIRE_GPIOLIB
 584         select CLKDEV_LOOKUP
 585         select CLKSRC_MMIO
 586         select GENERIC_CLOCKEVENTS
 587         help
 588           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 589           At present, the w90x900 has been renamed nuc900, regarding
 590           the ARM series product line, you can login the following
 591           link address to know more.
 592
 593           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 594                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 595
 596 config ARCH_NUC93X
 597         bool "Nuvoton NUC93X CPU"
 598         select CPU_ARM926T
 599         select CLKDEV_LOOKUP
 600         help
 601           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 602           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 603
 604 config ARCH_TEGRA
 605         bool "NVIDIA Tegra"
 606         select CLKDEV_LOOKUP
 607         select CLKSRC_MMIO
 608         select GENERIC_TIME
 609         select GENERIC_CLOCKEVENTS
 610         select GENERIC_GPIO
 611         select HAVE_CLK
 612         select HAVE_SCHED_CLOCK
 613         select ARCH_HAS_CPUFREQ
 614         help
 615           This enables support for NVIDIA Tegra based systems (Tegra APX,
 616           Tegra 6xx and Tegra 2 series).
 617
 618 config ARCH_PNX4008
 619         bool "Philips Nexperia PNX4008 Mobile"
 620         select CPU_ARM926T
 621         select CLKDEV_LOOKUP
 622         select ARCH_USES_GETTIMEOFFSET
 623         help
 624           This enables support for Philips PNX4008 mobile platform.
 625
 626 config ARCH_PXA
 627         bool "PXA2xx/PXA3xx-based"
 628         depends on MMU
 629         select ARCH_MTD_XIP
 630         select ARCH_HAS_CPUFREQ
 631         select CLKDEV_LOOKUP
 632         select CLKSRC_MMIO
 633         select ARCH_REQUIRE_GPIOLIB
 634         select GENERIC_CLOCKEVENTS
 635         select HAVE_SCHED_CLOCK
 636         select TICK_ONESHOT
 637         select PLAT_PXA
 638         select SPARSE_IRQ
 639         select AUTO_ZRELADDR
 640         select MULTI_IRQ_HANDLER
 641         help
 642           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 643
 644 config ARCH_MSM
 645         bool "Qualcomm MSM"
 646         select HAVE_CLK
 647         select GENERIC_CLOCKEVENTS
 648         select ARCH_REQUIRE_GPIOLIB
 649         select CLKDEV_LOOKUP
 650         help
 651           Support for Qualcomm MSM/QSD based systems.  This runs on the
 652           apps processor of the MSM/QSD and depends on a shared memory
 653           interface to the modem processor which runs the baseband
 654           stack and controls some vital subsystems
 655           (clock and power control, etc).
 656
 657 config ARCH_SHMOBILE
 658         bool "Renesas SH-Mobile / R-Mobile"
 659         select HAVE_CLK
 660         select CLKDEV_LOOKUP
 661         select HAVE_MACH_CLKDEV
 662         select GENERIC_CLOCKEVENTS
 663         select NO_IOPORT
 664         select SPARSE_IRQ
 665         select MULTI_IRQ_HANDLER
 666         select PM_GENERIC_DOMAINS if PM
 667         help
 668           Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
 669
 670 config ARCH_RPC
 671         bool "RiscPC"
 672         select ARCH_ACORN
 673         select FIQ
 674         select TIMER_ACORN
 675         select ARCH_MAY_HAVE_PC_FDC
 676         select HAVE_PATA_PLATFORM
 677         select ISA_DMA_API
 678         select NO_IOPORT
 679         select ARCH_SPARSEMEM_ENABLE
 680         select ARCH_USES_GETTIMEOFFSET
 681         help
 682           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 683           CD-ROM interface, serial and parallel port, and the floppy drive.
 684
 685 config ARCH_SA1100
 686         bool "SA1100-based"
 687         select CLKSRC_MMIO
 688         select CPU_SA1100
 689         select ISA
 690         select ARCH_SPARSEMEM_ENABLE
 691         select ARCH_MTD_XIP
 692         select ARCH_HAS_CPUFREQ
 693         select CPU_FREQ
 694         select GENERIC_CLOCKEVENTS
 695         select HAVE_CLK
 696         select HAVE_SCHED_CLOCK
 697         select TICK_ONESHOT
 698         select ARCH_REQUIRE_GPIOLIB
 699         help
 700           Support for StrongARM 11x0 based boards.
 701
 702 config ARCH_S3C2410
 703         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
 704         select GENERIC_GPIO
 705         select ARCH_HAS_CPUFREQ
 706         select HAVE_CLK
 707         select CLKDEV_LOOKUP
 708         select ARCH_USES_GETTIMEOFFSET
 709         select HAVE_S3C2410_I2C if I2C
 710         help
 711           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 712           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 713           the Samsung SMDK2410 development board (and derivatives).
 714
 715           Note, the S3C2416 and the S3C2450 are so close that they even share
 716           the same SoC ID code. This means that there is no separate machine
 717           directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
 718
 719 config ARCH_S3C64XX
 720         bool "Samsung S3C64XX"
 721         select PLAT_SAMSUNG
 722         select CPU_V6
 723         select ARM_VIC
 724         select HAVE_CLK
 725         select CLKDEV_LOOKUP
 726         select NO_IOPORT
 727         select ARCH_USES_GETTIMEOFFSET
 728         select ARCH_HAS_CPUFREQ
 729         select ARCH_REQUIRE_GPIOLIB
 730         select SAMSUNG_CLKSRC
 731         select SAMSUNG_IRQ_VIC_TIMER
 732         select SAMSUNG_IRQ_UART
 733         select S3C_GPIO_TRACK
 734         select S3C_GPIO_PULL_UPDOWN
 735         select S3C_GPIO_CFG_S3C24XX
 736         select S3C_GPIO_CFG_S3C64XX
 737         select S3C_DEV_NAND
 738         select USB_ARCH_HAS_OHCI
 739         select SAMSUNG_GPIOLIB_4BIT
 740         select HAVE_S3C2410_I2C if I2C
 741         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 742         help
 743           Samsung S3C64XX series based systems
 744
 745 config ARCH_S5P64X0
 746         bool "Samsung S5P6440 S5P6450"
 747         select CPU_V6
 748         select GENERIC_GPIO
 749         select HAVE_CLK
 750         select CLKDEV_LOOKUP
 751         select CLKSRC_MMIO
 752         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 753         select GENERIC_CLOCKEVENTS
 754         select HAVE_SCHED_CLOCK
 755         select HAVE_S3C2410_I2C if I2C
 756         select HAVE_S3C_RTC if RTC_CLASS
 757         help
 758           Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
 759           SMDK6450.
 760
 761 config ARCH_S5PC100
 762         bool "Samsung S5PC100"
 763         select GENERIC_GPIO
 764         select HAVE_CLK
 765         select CLKDEV_LOOKUP
 766         select CPU_V7
 767         select ARM_L1_CACHE_SHIFT_6
 768         select ARCH_USES_GETTIMEOFFSET
 769         select HAVE_S3C2410_I2C if I2C
 770         select HAVE_S3C_RTC if RTC_CLASS
 771         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 772         help
 773           Samsung S5PC100 series based systems
 774
 775 config ARCH_S5PV210
 776         bool "Samsung S5PV210/S5PC110"
 777         select CPU_V7
 778         select ARCH_SPARSEMEM_ENABLE
 779         select ARCH_HAS_HOLES_MEMORYMODEL
 780         select GENERIC_GPIO
 781         select HAVE_CLK
 782         select CLKDEV_LOOKUP
 783         select CLKSRC_MMIO
 784         select ARM_L1_CACHE_SHIFT_6
 785         select ARCH_HAS_CPUFREQ
 786         select GENERIC_CLOCKEVENTS
 787         select HAVE_SCHED_CLOCK
 788         select HAVE_S3C2410_I2C if I2C
 789         select HAVE_S3C_RTC if RTC_CLASS
 790         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 791         help
 792           Samsung S5PV210/S5PC110 series based systems
 793
 794 config ARCH_EXYNOS4
 795         bool "Samsung EXYNOS4"
 796         select CPU_V7
 797         select ARCH_SPARSEMEM_ENABLE
 798         select ARCH_HAS_HOLES_MEMORYMODEL
 799         select GENERIC_GPIO
 800         select HAVE_CLK
 801         select CLKDEV_LOOKUP
 802         select ARCH_HAS_CPUFREQ
 803         select GENERIC_CLOCKEVENTS
 804         select HAVE_S3C_RTC if RTC_CLASS
 805         select HAVE_S3C2410_I2C if I2C
 806         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 807         help
 808           Samsung EXYNOS4 series based systems
 809
 810 config ARCH_SHARK
 811         bool "Shark"
 812         select CPU_SA110
 813         select ISA
 814         select ISA_DMA
 815         select ZONE_DMA
 816         select PCI
 817         select ARCH_USES_GETTIMEOFFSET
 818         help
 819           Support for the StrongARM based Digital DNARD machine, also known
 820           as "Shark" (<http://www.shark-linux.de/shark.html>).
 821
 822 config ARCH_TCC_926
 823         bool "Telechips TCC ARM926-based systems"
 824         select CLKSRC_MMIO
 825         select CPU_ARM926T
 826         select HAVE_CLK
 827         select CLKDEV_LOOKUP
 828         select GENERIC_CLOCKEVENTS
 829         help
 830           Support for Telechips TCC ARM926-based systems.
 831
 832 config ARCH_U300
 833         bool "ST-Ericsson U300 Series"
 834         depends on MMU
 835         select CLKSRC_MMIO
 836         select CPU_ARM926T
 837         select HAVE_SCHED_CLOCK
 838         select HAVE_TCM
 839         select ARM_AMBA
 840         select ARM_VIC
 841         select GENERIC_CLOCKEVENTS
 842         select CLKDEV_LOOKUP
 843         select HAVE_MACH_CLKDEV
 844         select GENERIC_GPIO
 845         help
 846           Support for ST-Ericsson U300 series mobile platforms.
 847
 848 config ARCH_U8500
 849         bool "ST-Ericsson U8500 Series"
 850         select CPU_V7
 851         select ARM_AMBA
 852         select GENERIC_CLOCKEVENTS
 853         select CLKDEV_LOOKUP
 854         select ARCH_REQUIRE_GPIOLIB
 855         select ARCH_HAS_CPUFREQ
 856         help
 857           Support for ST-Ericsson's Ux500 architecture
 858
 859 config ARCH_NOMADIK
 860         bool "STMicroelectronics Nomadik"
 861         select ARM_AMBA
 862         select ARM_VIC
 863         select CPU_ARM926T
 864         select CLKDEV_LOOKUP
 865         select GENERIC_CLOCKEVENTS
 866         select ARCH_REQUIRE_GPIOLIB
 867         help
 868           Support for the Nomadik platform by ST-Ericsson
 869
 870 config ARCH_DAVINCI
 871         bool "TI DaVinci"
 872         select GENERIC_CLOCKEVENTS
 873         select ARCH_REQUIRE_GPIOLIB
 874         select ZONE_DMA
 875         select HAVE_IDE
 876         select CLKDEV_LOOKUP
 877         select GENERIC_ALLOCATOR
 878         select GENERIC_IRQ_CHIP
 879         select ARCH_HAS_HOLES_MEMORYMODEL
 880         help
 881           Support for TI's DaVinci platform.
 882
 883 config ARCH_OMAP
 884         bool "TI OMAP"
 885         select HAVE_CLK
 886         select ARCH_REQUIRE_GPIOLIB
 887         select ARCH_HAS_CPUFREQ
 888         select CLKSRC_MMIO
 889         select GENERIC_CLOCKEVENTS
 890         select HAVE_SCHED_CLOCK
 891         select ARCH_HAS_HOLES_MEMORYMODEL
 892         help
 893           Support for TI's OMAP platform (OMAP1/2/3/4).
 894
 895 config PLAT_SPEAR
 896         bool "ST SPEAr"
 897         select ARM_AMBA
 898         select ARCH_REQUIRE_GPIOLIB
 899         select CLKDEV_LOOKUP
 900         select CLKSRC_MMIO
 901         select GENERIC_CLOCKEVENTS
 902         select HAVE_CLK
 903         help
 904           Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
 905
 906 config ARCH_VT8500
 907         bool "VIA/WonderMedia 85xx"
 908         select CPU_ARM926T
 909         select GENERIC_GPIO
 910         select ARCH_HAS_CPUFREQ
 911         select GENERIC_CLOCKEVENTS
 912         select ARCH_REQUIRE_GPIOLIB
 913         select HAVE_PWM
 914         help
 915           Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
 916
 917 config ARCH_ZYNQ
 918         bool "Xilinx Zynq ARM Cortex A9 Platform"
 919         select CPU_V7
 920         select GENERIC_TIME
 921         select GENERIC_CLOCKEVENTS
 922         select CLKDEV_LOOKUP
 923         select ARM_GIC
 924         select ARM_AMBA
 925         select ICST
 926         select USE_OF
 927         help
 928           Support for Xilinx Zynq ARM Cortex A9 Platform
 929 endchoice
 930
 931 #
 932 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 933 # Kconfigs may be included either alphabetically (according to the
 934 # plat- suffix) or along side the corresponding mach-* source.
 935 #
 936 source "arch/arm/mach-at91/Kconfig"
 937
 938 source "arch/arm/mach-bcmring/Kconfig"
 939
 940 source "arch/arm/mach-clps711x/Kconfig"
 941
 942 source "arch/arm/mach-cns3xxx/Kconfig"
 943
 944 source "arch/arm/mach-davinci/Kconfig"
 945
 946 source "arch/arm/mach-dove/Kconfig"
 947
 948 source "arch/arm/mach-ep93xx/Kconfig"
 949
 950 source "arch/arm/mach-footbridge/Kconfig"
 951
 952 source "arch/arm/mach-gemini/Kconfig"
 953
 954 source "arch/arm/mach-h720x/Kconfig"
 955
 956 source "arch/arm/mach-integrator/Kconfig"
 957
 958 source "arch/arm/mach-iop32x/Kconfig"
 959
 960 source "arch/arm/mach-iop33x/Kconfig"
 961
 962 source "arch/arm/mach-iop13xx/Kconfig"
 963
 964 source "arch/arm/mach-ixp4xx/Kconfig"
 965
 966 source "arch/arm/mach-ixp2000/Kconfig"
 967
 968 source "arch/arm/mach-ixp23xx/Kconfig"
 969
 970 source "arch/arm/mach-kirkwood/Kconfig"
 971
 972 source "arch/arm/mach-ks8695/Kconfig"
 973
 974 source "arch/arm/mach-lpc32xx/Kconfig"
 975
 976 source "arch/arm/mach-msm/Kconfig"
 977
 978 source "arch/arm/mach-mv78xx0/Kconfig"
 979
 980 source "arch/arm/plat-mxc/Kconfig"
 981
 982 source "arch/arm/mach-mxs/Kconfig"
 983
 984 source "arch/arm/mach-netx/Kconfig"
 985
 986 source "arch/arm/mach-nomadik/Kconfig"
 987 source "arch/arm/plat-nomadik/Kconfig"
 988
 989 source "arch/arm/mach-nuc93x/Kconfig"
 990
 991 source "arch/arm/plat-omap/Kconfig"
 992
 993 source "arch/arm/mach-omap1/Kconfig"
 994
 995 source "arch/arm/mach-omap2/Kconfig"
 996
 997 source "arch/arm/mach-orion5x/Kconfig"
 998
 999 source "arch/arm/mach-pxa/Kconfig"
1000 source "arch/arm/plat-pxa/Kconfig"
1001
1002 source "arch/arm/mach-mmp/Kconfig"
1003
1004 source "arch/arm/mach-realview/Kconfig"
1005
1006 source "arch/arm/mach-sa1100/Kconfig"
1007
1008 source "arch/arm/plat-samsung/Kconfig"
1009 source "arch/arm/plat-s3c24xx/Kconfig"
1010 source "arch/arm/plat-s5p/Kconfig"
1011
1012 source "arch/arm/plat-spear/Kconfig"
1013
1014 source "arch/arm/plat-tcc/Kconfig"
1015
1016 if ARCH_S3C2410
1017 source "arch/arm/mach-s3c2410/Kconfig"
1018 source "arch/arm/mach-s3c2412/Kconfig"
1019 source "arch/arm/mach-s3c2416/Kconfig"
1020 source "arch/arm/mach-s3c2440/Kconfig"
1021 source "arch/arm/mach-s3c2443/Kconfig"
1022 endif
1023
1024 if ARCH_S3C64XX
1025 source "arch/arm/mach-s3c64xx/Kconfig"
1026 endif
1027
1028 source "arch/arm/mach-s5p64x0/Kconfig"
1029
1030 source "arch/arm/mach-s5pc100/Kconfig"
1031
1032 source "arch/arm/mach-s5pv210/Kconfig"
1033
1034 source "arch/arm/mach-exynos4/Kconfig"
1035
1036 source "arch/arm/mach-shmobile/Kconfig"
1037
1038 source "arch/arm/mach-tegra/Kconfig"
1039
1040 source "arch/arm/mach-u300/Kconfig"
1041
1042 source "arch/arm/mach-ux500/Kconfig"
1043
1044 source "arch/arm/mach-versatile/Kconfig"
1045
1046 source "arch/arm/mach-vexpress/Kconfig"
1047 source "arch/arm/plat-versatile/Kconfig"
1048
1049 source "arch/arm/mach-vt8500/Kconfig"
1050
1051 source "arch/arm/mach-w90x900/Kconfig"
1052
1053 # Definitions to make life easier
1054 config ARCH_ACORN
1055         bool
1056
1057 config PLAT_IOP
1058         bool
1059         select GENERIC_CLOCKEVENTS
1060         select HAVE_SCHED_CLOCK
1061
1062 config PLAT_ORION
1063         bool
1064         select CLKSRC_MMIO
1065         select GENERIC_IRQ_CHIP
1066         select HAVE_SCHED_CLOCK
1067
1068 config PLAT_PXA
1069         bool
1070
1071 config PLAT_VERSATILE
1072         bool
1073
1074 config ARM_TIMER_SP804
1075         bool
1076         select CLKSRC_MMIO
1077
1078 source arch/arm/mm/Kconfig
1079
1080 config IWMMXT
1081         bool "Enable iWMMXt support"
1082         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1083         default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
1084         help
1085           Enable support for iWMMXt context switching at run time if
1086           running on a CPU that supports it.
1087
1088 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
1089 config XSCALE_PMU
1090         bool
1091         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
1092         default y
1093
1094 config CPU_HAS_PMU
1095         depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
1096                    (!ARCH_OMAP3 || OMAP3_EMU)
1097         default y
1098         bool
1099
1100 config MULTI_IRQ_HANDLER
1101         bool
1102         help
1103           Allow each machine to specify it's own IRQ handler at run time.
1104
1105 if !MMU
1106 source "arch/arm/Kconfig-nommu"
1107 endif
1108
1109 config ARM_ERRATA_411920
1110         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1111         depends on CPU_V6 || CPU_V6K
1112         help
1113           Invalidation of the Instruction Cache operation can
1114           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1115           It does not affect the MPCore. This option enables the ARM Ltd.
1116           recommended workaround.
1117
1118 config ARM_ERRATA_430973
1119         bool "ARM errata: Stale prediction on replaced interworking branch"
1120         depends on CPU_V7
1121         help
1122           This option enables the workaround for the 430973 Cortex-A8
1123           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1124           interworking branch is replaced with another code sequence at the
1125           same virtual address, whether due to self-modifying code or virtual
1126           to physical address re-mapping, Cortex-A8 does not recover from the
1127           stale interworking branch prediction. This results in Cortex-A8
1128           executing the new code sequence in the incorrect ARM or Thumb state.
1129           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1130           and also flushes the branch target cache at every context switch.
1131           Note that setting specific bits in the ACTLR register may not be
1132           available in non-secure mode.
1133
1134 config ARM_ERRATA_458693
1135         bool "ARM errata: Processor deadlock when a false hazard is created"
1136         depends on CPU_V7
1137         help
1138           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1139           erratum. For very specific sequences of memory operations, it is
1140           possible for a hazard condition intended for a cache line to instead
1141           be incorrectly associated with a different cache line. This false
1142           hazard might then cause a processor deadlock. The workaround enables
1143           the L1 caching of the NEON accesses and disables the PLD instruction
1144           in the ACTLR register. Note that setting specific bits in the ACTLR
1145           register may not be available in non-secure mode.
1146
1147 config ARM_ERRATA_460075
1148         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1149         depends on CPU_V7
1150         help
1151           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1152           erratum. Any asynchronous access to the L2 cache may encounter a
1153           situation in which recent store transactions to the L2 cache are lost
1154           and overwritten with stale memory contents from external memory. The
1155           workaround disables the write-allocate mode for the L2 cache via the
1156           ACTLR register. Note that setting specific bits in the ACTLR register
1157           may not be available in non-secure mode.
1158
1159 config ARM_ERRATA_742230
1160         bool "ARM errata: DMB operation may be faulty"
1161         depends on CPU_V7 && SMP
1162         help
1163           This option enables the workaround for the 742230 Cortex-A9
1164           (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1165           between two write operations may not ensure the correct visibility
1166           ordering of the two writes. This workaround sets a specific bit in
1167           the diagnostic register of the Cortex-A9 which causes the DMB
1168           instruction to behave as a DSB, ensuring the correct behaviour of
1169           the two writes.
1170
1171 config ARM_ERRATA_742231
1172         bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1173         depends on CPU_V7 && SMP
1174         help
1175           This option enables the workaround for the 742231 Cortex-A9
1176           (r2p0..r2p2) erratum. Under certain conditions, specific to the
1177           Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1178           accessing some data located in the same cache line, may get corrupted
1179           data due to bad handling of the address hazard when the line gets
1180           replaced from one of the CPUs at the same time as another CPU is
1181           accessing it. This workaround sets specific bits in the diagnostic
1182           register of the Cortex-A9 which reduces the linefill issuing
1183           capabilities of the processor.
1184
1185 config PL310_ERRATA_588369
1186         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1187         depends on CACHE_L2X0
1188         help
1189            The PL310 L2 cache controller implements three types of Clean &
1190            Invalidate maintenance operations: by Physical Address
1191            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1192            They are architecturally defined to behave as the execution of a
1193            clean operation followed immediately by an invalidate operation,
1194            both performing to the same memory location. This functionality
1195            is not correctly implemented in PL310 as clean lines are not
1196            invalidated as a result of these operations.
1197
1198 config ARM_ERRATA_720789
1199         bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1200         depends on CPU_V7 && SMP
1201         help
1202           This option enables the workaround for the 720789 Cortex-A9 (prior to
1203           r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1204           broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1205           As a consequence of this erratum, some TLB entries which should be
1206           invalidated are not, resulting in an incoherency in the system page
1207           tables. The workaround changes the TLB flushing routines to invalidate
1208           entries regardless of the ASID.
1209
1210 config PL310_ERRATA_727915
1211         bool "Background Clean & Invalidate by Way operation can cause data corruption"
1212         depends on CACHE_L2X0
1213         help
1214           PL310 implements the Clean & Invalidate by Way L2 cache maintenance
1215           operation (offset 0x7FC). This operation runs in background so that
1216           PL310 can handle normal accesses while it is in progress. Under very
1217           rare circumstances, due to this erratum, write data can be lost when
1218           PL310 treats a cacheable write transaction during a Clean &
1219           Invalidate by Way operation.
1220
1221 config ARM_ERRATA_743622
1222         bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1223         depends on CPU_V7
1224         help
1225           This option enables the workaround for the 743622 Cortex-A9
1226           (r2p0..r2p2) erratum. Under very rare conditions, a faulty
1227           optimisation in the Cortex-A9 Store Buffer may lead to data
1228           corruption. This workaround sets a specific bit in the diagnostic
1229           register of the Cortex-A9 which disables the Store Buffer
1230           optimisation, preventing the defect from occurring. This has no
1231           visible impact on the overall performance or power consumption of the
1232           processor.
1233
1234 config ARM_ERRATA_751472
1235         bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1236         depends on CPU_V7 && SMP
1237         help
1238           This option enables the workaround for the 751472 Cortex-A9 (prior
1239           to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1240           completion of a following broadcasted operation if the second
1241           operation is received by a CPU before the ICIALLUIS has completed,
1242           potentially leading to corrupted entries in the cache or TLB.
1243
1244 config ARM_ERRATA_753970
1245         bool "ARM errata: cache sync operation may be faulty"
1246         depends on CACHE_PL310
1247         help
1248           This option enables the workaround for the 753970 PL310 (r3p0) erratum.
1249
1250           Under some condition the effect of cache sync operation on
1251           the store buffer still remains when the operation completes.
1252           This means that the store buffer is always asked to drain and
1253           this prevents it from merging any further writes. The workaround
1254           is to replace the normal offset of cache sync operation (0x730)
1255           by another offset targeting an unmapped PL310 register 0x740.
1256           This has the same effect as the cache sync operation: store buffer
1257           drain and waiting for all buffers empty.
1258
1259 config ARM_ERRATA_754322
1260         bool "ARM errata: possible faulty MMU translations following an ASID switch"
1261         depends on CPU_V7
1262         help
1263           This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1264           r3p*) erratum. A speculative memory access may cause a page table walk
1265           which starts prior to an ASID switch but completes afterwards. This
1266           can populate the micro-TLB with a stale entry which may be hit with
1267           the new ASID. This workaround places two dsb instructions in the mm
1268           switching code so that no page table walks can cross the ASID switch.
1269
1270 config ARM_ERRATA_754327
1271         bool "ARM errata: no automatic Store Buffer drain"
1272         depends on CPU_V7 && SMP
1273         help
1274           This option enables the workaround for the 754327 Cortex-A9 (prior to
1275           r2p0) erratum. The Store Buffer does not have any automatic draining
1276           mechanism and therefore a livelock may occur if an external agent
1277           continuously polls a memory location waiting to observe an update.
1278           This workaround defines cpu_relax() as smp_mb(), preventing correctly
1279           written polling loops from denying visibility of updates to memory.
1280
1281 endmenu
1282
1283 source "arch/arm/common/Kconfig"
1284
1285 menu "Bus support"
1286
1287 config ARM_AMBA
1288         bool
1289
1290 config ISA
1291         bool
1292         help
1293           Find out whether you have ISA slots on your motherboard.  ISA is the
1294           name of a bus system, i.e. the way the CPU talks to the other stuff
1295           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1296           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1297           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1298
1299 # Select ISA DMA controller support
1300 config ISA_DMA
1301         bool
1302         select ISA_DMA_API
1303
1304 # Select ISA DMA interface
1305 config ISA_DMA_API
1306         bool
1307
1308 config PCI
1309         bool "PCI support" if MIGHT_HAVE_PCI
1310         help
1311           Find out whether you have a PCI motherboard. PCI is the name of a
1312           bus system, i.e. the way the CPU talks to the other stuff inside
1313           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1314           VESA. If you have PCI, say Y, otherwise N.
1315
1316 config PCI_DOMAINS
1317         bool
1318         depends on PCI
1319
1320 config PCI_NANOENGINE
1321         bool "BSE nanoEngine PCI support"
1322         depends on SA1100_NANOENGINE
1323         help
1324           Enable PCI on the BSE nanoEngine board.
1325
1326 config PCI_SYSCALL
1327         def_bool PCI
1328
1329 # Select the host bridge type
1330 config PCI_HOST_VIA82C505
1331         bool
1332         depends on PCI && ARCH_SHARK
1333         default y
1334
1335 config PCI_HOST_ITE8152
1336         bool
1337         depends on PCI && MACH_ARMCORE
1338         default y
1339         select DMABOUNCE
1340
1341 source "drivers/pci/Kconfig"
1342
1343 source "drivers/pcmcia/Kconfig"
1344
1345 endmenu
1346
1347 menu "Kernel Features"
1348
1349 source "kernel/time/Kconfig"
1350
1351 config SMP
1352         bool "Symmetric Multi-Processing"
1353         depends on CPU_V6K || CPU_V7
1354         depends on GENERIC_CLOCKEVENTS
1355         depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
1356                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
1357                  ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
1358                  ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
1359         select USE_GENERIC_SMP_HELPERS
1360         select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
1361         help
1362           This enables support for systems with more than one CPU. If you have
1363           a system with only one CPU, like most personal computers, say N. If
1364           you have a system with more than one CPU, say Y.
1365
1366           If you say N here, the kernel will run on single and multiprocessor
1367           machines, but will use only one CPU of a multiprocessor machine. If
1368           you say Y here, the kernel will run on many, but not all, single
1369           processor machines. On a single processor machine, the kernel will
1370           run faster if you say N here.
1371
1372           See also <file:Documentation/i386/IO-APIC.txt>,
1373           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1374           <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1375
1376           If you don't know what to do here, say N.
1377
1378 config SMP_ON_UP
1379         bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1380         depends on EXPERIMENTAL
1381         depends on SMP && !XIP_KERNEL
1382         default y
1383         help
1384           SMP kernels contain instructions which fail on non-SMP processors.
1385           Enabling this option allows the kernel to modify itself to make
1386           these instructions safe.  Disabling it allows about 1K of space
1387           savings.
1388
1389           If you don't know what to do here, say Y.
1390
1391 config HAVE_ARM_SCU
1392         bool
1393         help
1394           This option enables support for the ARM system coherency unit
1395
1396 config HAVE_ARM_TWD
1397         bool
1398         depends on SMP
1399         select TICK_ONESHOT
1400         help
1401           This options enables support for the ARM timer and watchdog unit
1402
1403 choice
1404         prompt "Memory split"
1405         default VMSPLIT_3G
1406         help
1407           Select the desired split between kernel and user memory.
1408
1409           If you are not absolutely sure what you are doing, leave this
1410           option alone!
1411
1412         config VMSPLIT_3G
1413                 bool "3G/1G user/kernel split"
1414         config VMSPLIT_2G
1415                 bool "2G/2G user/kernel split"
1416         config VMSPLIT_1G
1417                 bool "1G/3G user/kernel split"
1418 endchoice
1419
1420 config PAGE_OFFSET
1421         hex
1422         default 0x40000000 if VMSPLIT_1G
1423         default 0x80000000 if VMSPLIT_2G
1424         default 0xC0000000
1425
1426 config NR_CPUS
1427         int "Maximum number of CPUs (2-32)"
1428         range 2 32
1429         depends on SMP
1430         default "4"
1431
1432 config HOTPLUG_CPU
1433         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1434         depends on SMP && HOTPLUG && EXPERIMENTAL
1435         help
1436           Say Y here to experiment with turning CPUs off and on.  CPUs
1437           can be controlled through /sys/devices/system/cpu.
1438
1439 config LOCAL_TIMERS
1440         bool "Use local timer interrupts"
1441         depends on SMP
1442         default y
1443         select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
1444         help
1445           Enable support for local timers on SMP platforms, rather then the
1446           legacy IPI broadcast method.  Local timers allows the system
1447           accounting to be spread across the timer interval, preventing a
1448           "thundering herd" at every timer tick.
1449
1450 source kernel/Kconfig.preempt
1451
1452 config HZ
1453         int
1454         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
1455                 ARCH_S5PV210 || ARCH_EXYNOS4
1456         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1457         default AT91_TIMER_HZ if ARCH_AT91
1458         default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1459         default 100
1460
1461 config THUMB2_KERNEL
1462         bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
1463         depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
1464         select AEABI
1465         select ARM_ASM_UNIFIED
1466         help
1467           By enabling this option, the kernel will be compiled in
1468           Thumb-2 mode. A compiler/assembler that understand the unified
1469           ARM-Thumb syntax is needed.
1470
1471           If unsure, say N.
1472
1473 config THUMB2_AVOID_R_ARM_THM_JUMP11
1474         bool "Work around buggy Thumb-2 short branch relocations in gas"
1475         depends on THUMB2_KERNEL && MODULES
1476         default y
1477         help
1478           Various binutils versions can resolve Thumb-2 branches to
1479           locally-defined, preemptible global symbols as short-range "b.n"
1480           branch instructions.
1481
1482           This is a problem, because there's no guarantee the final
1483           destination of the symbol, or any candidate locations for a
1484           trampoline, are within range of the branch.  For this reason, the
1485           kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1486           relocation in modules at all, and it makes little sense to add
1487           support.
1488
1489           The symptom is that the kernel fails with an "unsupported
1490           relocation" error when loading some modules.
1491
1492           Until fixed tools are available, passing
1493           -fno-optimize-sibling-calls to gcc should prevent gcc generating
1494           code which hits this problem, at the cost of a bit of extra runtime
1495           stack usage in some cases.
1496
1497           The problem is described in more detail at:
1498               https://bugs.launchpad.net/binutils-linaro/+bug/725126
1499
1500           Only Thumb-2 kernels are affected.
1501
1502           Unless you are sure your tools don't have this problem, say Y.
1503
1504 config ARM_ASM_UNIFIED
1505         bool
1506
1507 config AEABI
1508         bool "Use the ARM EABI to compile the kernel"
1509         help
1510           This option allows for the kernel to be compiled using the latest
1511           ARM ABI (aka EABI).  This is only useful if you are using a user
1512           space environment that is also compiled with EABI.
1513
1514           Since there are major incompatibilities between the legacy ABI and
1515           EABI, especially with regard to structure member alignment, this
1516           option also changes the kernel syscall calling convention to
1517           disambiguate both ABIs and allow for backward compatibility support
1518           (selected with CONFIG_OABI_COMPAT).
1519
1520           To use this you need GCC version 4.0.0 or later.
1521
1522 config OABI_COMPAT
1523         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1524         depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
1525         default y
1526         help
1527           This option preserves the old syscall interface along with the
1528           new (ARM EABI) one. It also provides a compatibility layer to
1529           intercept syscalls that have structure arguments which layout
1530           in memory differs between the legacy ABI and the new ARM EABI
1531           (only for non "thumb" binaries). This option adds a tiny
1532           overhead to all syscalls and produces a slightly larger kernel.
1533           If you know you'll be using only pure EABI user space then you
1534           can say N here. If this option is not selected and you attempt
1535           to execute a legacy ABI binary then the result will be
1536           UNPREDICTABLE (in fact it can be predicted that it won't work
1537           at all). If in doubt say Y.
1538
1539 config ARCH_HAS_HOLES_MEMORYMODEL
1540         bool
1541
1542 config ARCH_SPARSEMEM_ENABLE
1543         bool
1544
1545 config ARCH_SPARSEMEM_DEFAULT
1546         def_bool ARCH_SPARSEMEM_ENABLE
1547
1548 config ARCH_SELECT_MEMORY_MODEL
1549         def_bool ARCH_SPARSEMEM_ENABLE
1550
1551 config HAVE_ARCH_PFN_VALID
1552         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1553
1554 config HIGHMEM
1555         bool "High Memory Support"
1556         depends on MMU
1557         help
1558           The address space of ARM processors is only 4 Gigabytes large
1559           and it has to accommodate user address space, kernel address
1560           space as well as some memory mapped IO. That means that, if you
1561           have a large amount of physical memory and/or IO, not all of the
1562           memory can be "permanently mapped" by the kernel. The physical
1563           memory that is not permanently mapped is called "high memory".
1564
1565           Depending on the selected kernel/user memory split, minimum
1566           vmalloc space and actual amount of RAM, you may not need this
1567           option which should result in a slightly faster kernel.
1568
1569           If unsure, say n.
1570
1571 config HIGHPTE
1572         bool "Allocate 2nd-level pagetables from highmem"
1573         depends on HIGHMEM
1574
1575 config HW_PERF_EVENTS
1576         bool "Enable hardware performance counter support for perf events"
1577         depends on PERF_EVENTS && CPU_HAS_PMU
1578         default y
1579         help
1580           Enable hardware performance counter support for perf events. If
1581           disabled, perf events will use software events only.
1582
1583 source "mm/Kconfig"
1584
1585 config FORCE_MAX_ZONEORDER
1586         int "Maximum zone order" if ARCH_SHMOBILE
1587         range 11 64 if ARCH_SHMOBILE
1588         default "9" if SA1111
1589         default "11"
1590         help
1591           The kernel memory allocator divides physically contiguous memory
1592           blocks into "zones", where each zone is a power of two number of
1593           pages.  This option selects the largest power of two that the kernel
1594           keeps in the memory allocator.  If you need to allocate very large
1595           blocks of physically contiguous memory, then you may need to
1596           increase this value.
1597
1598           This config option is actually maximum order plus one. For example,
1599           a value of 11 means that the largest free memory block is 2^10 pages.
1600
1601 config LEDS
1602         bool "Timer and CPU usage LEDs"
1603         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1604                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1605                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1606                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1607                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1608                    ARCH_AT91 || ARCH_DAVINCI || \
1609                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1610         help
1611           If you say Y here, the LEDs on your machine will be used
1612           to provide useful information about your current system status.
1613
1614           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1615           be able to select which LEDs are active using the options below. If
1616           you are compiling a kernel for the EBSA-110 or the LART however, the
1617           red LED will simply flash regularly to indicate that the system is
1618           still functional. It is safe to say Y here if you have a CATS
1619           system, but the driver will do nothing.
1620
1621 config LEDS_TIMER
1622         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1623                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1624                             || MACH_OMAP_PERSEUS2
1625         depends on LEDS
1626         depends on !GENERIC_CLOCKEVENTS
1627         default y if ARCH_EBSA110
1628         help
1629           If you say Y here, one of the system LEDs (the green one on the
1630           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1631           will flash regularly to indicate that the system is still
1632           operational. This is mainly useful to kernel hackers who are
1633           debugging unstable kernels.
1634
1635           The LART uses the same LED for both Timer LED and CPU usage LED
1636           functions. You may choose to use both, but the Timer LED function
1637           will overrule the CPU usage LED.
1638
1639 config LEDS_CPU
1640         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1641                         !ARCH_OMAP) \
1642                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1643                         || MACH_OMAP_PERSEUS2
1644         depends on LEDS
1645         help
1646           If you say Y here, the red LED will be used to give a good real
1647           time indication of CPU usage, by lighting whenever the idle task
1648           is not currently executing.
1649
1650           The LART uses the same LED for both Timer LED and CPU usage LED
1651           functions. You may choose to use both, but the Timer LED function
1652           will overrule the CPU usage LED.
1653
1654 config ALIGNMENT_TRAP
1655         bool
1656         depends on CPU_CP15_MMU
1657         default y if !ARCH_EBSA110
1658         select HAVE_PROC_CPU if PROC_FS
1659         help
1660           ARM processors cannot fetch/store information which is not
1661           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1662           address divisible by 4. On 32-bit ARM processors, these non-aligned
1663           fetch/store instructions will be emulated in software if you say
1664           here, which has a severe performance impact. This is necessary for
1665           correct operation of some network protocols. With an IP-only
1666           configuration it is safe to say N, otherwise say Y.
1667
1668 config UACCESS_WITH_MEMCPY
1669         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1670         depends on MMU && EXPERIMENTAL
1671         default y if CPU_FEROCEON
1672         help
1673           Implement faster copy_to_user and clear_user methods for CPU
1674           cores where a 8-word STM instruction give significantly higher
1675           memory write throughput than a sequence of individual 32bit stores.
1676
1677           A possible side effect is a slight increase in scheduling latency
1678           between threads sharing the same address space if they invoke
1679           such copy operations with large buffers.
1680
1681           However, if the CPU data cache is using a write-allocate mode,
1682           this option is unlikely to provide any performance gain.
1683
1684 config SECCOMP
1685         bool
1686         prompt "Enable seccomp to safely compute untrusted bytecode"
1687         ---help---
1688           This kernel feature is useful for number crunching applications
1689           that may need to compute untrusted bytecode during their
1690           execution. By using pipes or other transports made available to
1691           the process as file descriptors supporting the read/write
1692           syscalls, it's possible to isolate those applications in
1693           their own address space using seccomp. Once seccomp is
1694           enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1695           and the task is only allowed to execute a few safe syscalls
1696           defined by each seccomp mode.
1697
1698 config CC_STACKPROTECTOR
1699         bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1700         depends on EXPERIMENTAL
1701         help
1702           This option turns on the -fstack-protector GCC feature. This
1703           feature puts, at the beginning of functions, a canary value on
1704           the stack just before the return address, and validates
1705           the value just before actually returning.  Stack based buffer
1706           overflows (that need to overwrite this return address) now also
1707           overwrite the canary, which gets detected and the attack is then
1708           neutralized via a kernel panic.
1709           This feature requires gcc version 4.2 or above.
1710
1711 config DEPRECATED_PARAM_STRUCT
1712         bool "Provide old way to pass kernel parameters"
1713         help
1714           This was deprecated in 2001 and announced to live on for 5 years.
1715           Some old boot loaders still use this way.
1716
1717 endmenu
1718
1719 menu "Boot options"
1720
1721 config USE_OF
1722         bool "Flattened Device Tree support"
1723         select OF
1724         select OF_EARLY_FLATTREE
1725         select IRQ_DOMAIN
1726         help
1727           Include support for flattened device tree machine descriptions.
1728
1729 # Compressed boot loader in ROM.  Yes, we really want to ask about
1730 # TEXT and BSS so we preserve their values in the config files.
1731 config ZBOOT_ROM_TEXT
1732         hex "Compressed ROM boot loader base address"
1733         default "0"
1734         help
1735           The physical address at which the ROM-able zImage is to be
1736           placed in the target.  Platforms which normally make use of
1737           ROM-able zImage formats normally set this to a suitable
1738           value in their defconfig file.
1739
1740           If ZBOOT_ROM is not enabled, this has no effect.
1741
1742 config ZBOOT_ROM_BSS
1743         hex "Compressed ROM boot loader BSS address"
1744         default "0"
1745         help
1746           The base address of an area of read/write memory in the target
1747           for the ROM-able zImage which must be available while the
1748           decompressor is running. It must be large enough to hold the
1749           entire decompressed kernel plus an additional 128 KiB.
1750           Platforms which normally make use of ROM-able zImage formats
1751           normally set this to a suitable value in their defconfig file.
1752
1753           If ZBOOT_ROM is not enabled, this has no effect.
1754
1755 config ZBOOT_ROM
1756         bool "Compressed boot loader in ROM/flash"
1757         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1758         help
1759           Say Y here if you intend to execute your compressed kernel image
1760           (zImage) directly from ROM or flash.  If unsure, say N.
1761
1762 choice
1763         prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1764         depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
1765         default ZBOOT_ROM_NONE
1766         help
1767           Include experimental SD/MMC loading code in the ROM-able zImage.
1768           With this enabled it is possible to write the the ROM-able zImage
1769           kernel image to an MMC or SD card and boot the kernel straight
1770           from the reset vector. At reset the processor Mask ROM will load
1771           the first part of the the ROM-able zImage which in turn loads the
1772           rest the kernel image to RAM.
1773
1774 config ZBOOT_ROM_NONE
1775         bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1776         help
1777           Do not load image from SD or MMC
1778
1779 config ZBOOT_ROM_MMCIF
1780         bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
1781         help
1782           Load image from MMCIF hardware block.
1783
1784 config ZBOOT_ROM_SH_MOBILE_SDHI
1785         bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1786         help
1787           Load image from SDHI hardware block
1788
1789 endchoice
1790
1791 config CMDLINE
1792         string "Default kernel command string"
1793         default ""
1794         help
1795           On some architectures (EBSA110 and CATS), there is currently no way
1796           for the boot loader to pass arguments to the kernel. For these
1797           architectures, you should supply some command-line options at build
1798           time by entering them here. As a minimum, you should specify the
1799           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1800
1801 choice
1802         prompt "Kernel command line type" if CMDLINE != ""
1803         default CMDLINE_FROM_BOOTLOADER
1804
1805 config CMDLINE_FROM_BOOTLOADER
1806         bool "Use bootloader kernel arguments if available"
1807         help
1808           Uses the command-line options passed by the boot loader. If
1809           the boot loader doesn't provide any, the default kernel command
1810           string provided in CMDLINE will be used.
1811
1812 config CMDLINE_EXTEND
1813         bool "Extend bootloader kernel arguments"
1814         help
1815           The command-line arguments provided by the boot loader will be
1816           appended to the default kernel command string.
1817
1818 config CMDLINE_FORCE
1819         bool "Always use the default kernel command string"
1820         help
1821           Always use the default kernel command string, even if the boot
1822           loader passes other arguments to the kernel.
1823           This is useful if you cannot or don't want to change the
1824           command-line options your boot loader passes to the kernel.
1825 endchoice
1826
1827 config XIP_KERNEL
1828         bool "Kernel Execute-In-Place from ROM"
1829         depends on !ZBOOT_ROM
1830         help
1831           Execute-In-Place allows the kernel to run from non-volatile storage
1832           directly addressable by the CPU, such as NOR flash. This saves RAM
1833           space since the text section of the kernel is not loaded from flash
1834           to RAM.  Read-write sections, such as the data section and stack,
1835           are still copied to RAM.  The XIP kernel is not compressed since
1836           it has to run directly from flash, so it will take more space to
1837           store it.  The flash address used to link the kernel object files,
1838           and for storing it, is configuration dependent. Therefore, if you
1839           say Y here, you must know the proper physical address where to
1840           store the kernel image depending on your own flash memory usage.
1841
1842           Also note that the make target becomes "make xipImage" rather than
1843           "make zImage" or "make Image".  The final kernel binary to put in
1844           ROM memory will be arch/arm/boot/xipImage.
1845
1846           If unsure, say N.
1847
1848 config XIP_PHYS_ADDR
1849         hex "XIP Kernel Physical Location"
1850         depends on XIP_KERNEL
1851         default "0x00080000"
1852         help
1853           This is the physical address in your flash memory the kernel will
1854           be linked for and stored to.  This address is dependent on your
1855           own flash usage.
1856
1857 config KEXEC
1858         bool "Kexec system call (EXPERIMENTAL)"
1859         depends on EXPERIMENTAL
1860         help
1861           kexec is a system call that implements the ability to shutdown your
1862           current kernel, and to start another kernel.  It is like a reboot
1863           but it is independent of the system firmware.   And like a reboot
1864           you can start any kernel with it, not just Linux.
1865
1866           It is an ongoing process to be certain the hardware in a machine
1867           is properly shutdown, so do not be surprised if this code does not
1868           initially work for you.  It may help to enable device hotplugging
1869           support.
1870
1871 config ATAGS_PROC
1872         bool "Export atags in procfs"
1873         depends on KEXEC
1874         default y
1875         help
1876           Should the atags used to boot the kernel be exported in an "atags"
1877           file in procfs. Useful with kexec.
1878
1879 config CRASH_DUMP
1880         bool "Build kdump crash kernel (EXPERIMENTAL)"
1881         depends on EXPERIMENTAL
1882         help
1883           Generate crash dump after being started by kexec. This should
1884           be normally only set in special crash dump kernels which are
1885           loaded in the main kernel with kexec-tools into a specially
1886           reserved region and then later executed after a crash by
1887           kdump/kexec. The crash dump kernel must be compiled to a
1888           memory address not used by the main kernel
1889
1890           For more details see Documentation/kdump/kdump.txt
1891
1892 config AUTO_ZRELADDR
1893         bool "Auto calculation of the decompressed kernel image address"
1894         depends on !ZBOOT_ROM && !ARCH_U300
1895         help
1896           ZRELADDR is the physical address where the decompressed kernel
1897           image will be placed. If AUTO_ZRELADDR is selected, the address
1898           will be determined at run-time by masking the current IP with
1899           0xf8000000. This assumes the zImage being placed in the first 128MB
1900           from start of memory.
1901
1902 endmenu
1903
1904 menu "CPU Power Management"
1905
1906 if ARCH_HAS_CPUFREQ
1907
1908 source "drivers/cpufreq/Kconfig"
1909
1910 config CPU_FREQ_IMX
1911         tristate "CPUfreq driver for i.MX CPUs"
1912         depends on ARCH_MXC && CPU_FREQ
1913         help
1914           This enables the CPUfreq driver for i.MX CPUs.
1915
1916 config CPU_FREQ_SA1100
1917         bool
1918
1919 config CPU_FREQ_SA1110
1920         bool
1921
1922 config CPU_FREQ_INTEGRATOR
1923         tristate "CPUfreq driver for ARM Integrator CPUs"
1924         depends on ARCH_INTEGRATOR && CPU_FREQ
1925         default y
1926         help
1927           This enables the CPUfreq driver for ARM Integrator CPUs.
1928
1929           For details, take a look at <file:Documentation/cpu-freq>.
1930
1931           If in doubt, say Y.
1932
1933 config CPU_FREQ_PXA
1934         bool
1935         depends on CPU_FREQ && ARCH_PXA && PXA25x
1936         default y
1937         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1938
1939 config CPU_FREQ_S3C
1940         bool
1941         help
1942           Internal configuration node for common cpufreq on Samsung SoC
1943
1944 config CPU_FREQ_S3C24XX
1945         bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
1946         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1947         select CPU_FREQ_S3C
1948         help
1949           This enables the CPUfreq driver for the Samsung S3C24XX family
1950           of CPUs.
1951
1952           For details, take a look at <file:Documentation/cpu-freq>.
1953
1954           If in doubt, say N.
1955
1956 config CPU_FREQ_S3C24XX_PLL
1957         bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
1958         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1959         help
1960           Compile in support for changing the PLL frequency from the
1961           S3C24XX series CPUfreq driver. The PLL takes time to settle
1962           after a frequency change, so by default it is not enabled.
1963
1964           This also means that the PLL tables for the selected CPU(s) will
1965           be built which may increase the size of the kernel image.
1966
1967 config CPU_FREQ_S3C24XX_DEBUG
1968         bool "Debug CPUfreq Samsung driver core"
1969         depends on CPU_FREQ_S3C24XX
1970         help
1971           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1972
1973 config CPU_FREQ_S3C24XX_IODEBUG
1974         bool "Debug CPUfreq Samsung driver IO timing"
1975         depends on CPU_FREQ_S3C24XX
1976         help
1977           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1978
1979 config CPU_FREQ_S3C24XX_DEBUGFS
1980         bool "Export debugfs for CPUFreq"
1981         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1982         help
1983           Export status information via debugfs.
1984
1985 endif
1986
1987 source "drivers/cpuidle/Kconfig"
1988
1989 endmenu
1990
1991 menu "Floating point emulation"
1992
1993 comment "At least one emulation must be selected"
1994
1995 config FPE_NWFPE
1996         bool "NWFPE math emulation"
1997         depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
1998         ---help---
1999           Say Y to include the NWFPE floating point emulator in the kernel.
2000           This is necessary to run most binaries. Linux does not currently
2001           support floating point hardware so you need to say Y here even if
2002           your machine has an FPA or floating point co-processor podule.
2003
2004           You may say N here if you are going to load the Acorn FPEmulator
2005           early in the bootup.
2006
2007 config FPE_NWFPE_XP
2008         bool "Support extended precision"
2009         depends on FPE_NWFPE
2010         help
2011           Say Y to include 80-bit support in the kernel floating-point
2012           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
2013           Note that gcc does not generate 80-bit operations by default,
2014           so in most cases this option only enlarges the size of the
2015           floating point emulator without any good reason.
2016
2017           You almost surely want to say N here.
2018
2019 config FPE_FASTFPE
2020         bool "FastFPE math emulation (EXPERIMENTAL)"
2021         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
2022         ---help---
2023           Say Y here to include the FAST floating point emulator in the kernel.
2024           This is an experimental much faster emulator which now also has full
2025           precision for the mantissa.  It does not support any exceptions.
2026           It is very simple, and approximately 3-6 times faster than NWFPE.
2027
2028           It should be sufficient for most programs.  It may be not suitable
2029           for scientific calculations, but you have to check this for yourself.
2030           If you do not feel you need a faster FP emulation you should better
2031           choose NWFPE.
2032
2033 config VFP
2034         bool "VFP-format floating point maths"
2035         depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
2036         help
2037           Say Y to include VFP support code in the kernel. This is needed
2038           if your hardware includes a VFP unit.
2039
2040           Please see <file:Documentation/arm/VFP/release-notes.txt> for
2041           release notes and additional status information.
2042
2043           Say N if your target does not have VFP hardware.
2044
2045 config VFPv3
2046         bool
2047         depends on VFP
2048         default y if CPU_V7
2049
2050 config NEON
2051         bool "Advanced SIMD (NEON) Extension support"
2052         depends on VFPv3 && CPU_V7
2053         help
2054           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2055           Extension.
2056
2057 endmenu
2058
2059 menu "Userspace binary formats"
2060
2061 source "fs/Kconfig.binfmt"
2062
2063 config ARTHUR
2064         tristate "RISC OS personality"
2065         depends on !AEABI
2066         help
2067           Say Y here to include the kernel code necessary if you want to run
2068           Acorn RISC OS/Arthur binaries under Linux. This code is still very
2069           experimental; if this sounds frightening, say N and sleep in peace.
2070           You can also say M here to compile this support as a module (which
2071           will be called arthur).
2072
2073 endmenu
2074
2075 menu "Power management options"
2076
2077 source "kernel/power/Kconfig"
2078
2079 config ARCH_SUSPEND_POSSIBLE
2080         depends on !ARCH_S5P64X0 && !ARCH_S5PC100
2081         depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
2082                 CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
2083         def_bool y
2084
2085 endmenu
2086
2087 source "net/Kconfig"
2088
2089 source "drivers/Kconfig"
2090
2091 source "fs/Kconfig"
2092
2093 source "arch/arm/Kconfig.debug"
2094
2095 source "security/Kconfig"
2096
2097 source "crypto/Kconfig"
2098
2099 source "lib/Kconfig"