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         select NO_MACH_MEMORY_H
 507         help
 508           Support for the Marvell Dove SoC 88AP510
 509
 510 config ARCH_KIRKWOOD
 511         bool "Marvell Kirkwood"
 512         select CPU_FEROCEON
 513         select PCI
 514         select ARCH_REQUIRE_GPIOLIB
 515         select GENERIC_CLOCKEVENTS
 516         select PLAT_ORION
 517         select NO_MACH_MEMORY_H
 518         help
 519           Support for the following Marvell Kirkwood series SoCs:
 520           88F6180, 88F6192 and 88F6281.
 521
 522 config ARCH_LPC32XX
 523         bool "NXP LPC32XX"
 524         select CLKSRC_MMIO
 525         select CPU_ARM926T
 526         select ARCH_REQUIRE_GPIOLIB
 527         select HAVE_IDE
 528         select ARM_AMBA
 529         select USB_ARCH_HAS_OHCI
 530         select CLKDEV_LOOKUP
 531         select GENERIC_TIME
 532         select GENERIC_CLOCKEVENTS
 533         help
 534           Support for the NXP LPC32XX family of processors
 535
 536 config ARCH_MV78XX0
 537         bool "Marvell MV78xx0"
 538         select CPU_FEROCEON
 539         select PCI
 540         select ARCH_REQUIRE_GPIOLIB
 541         select GENERIC_CLOCKEVENTS
 542         select PLAT_ORION
 543         help
 544           Support for the following Marvell MV78xx0 series SoCs:
 545           MV781x0, MV782x0.
 546
 547 config ARCH_ORION5X
 548         bool "Marvell Orion"
 549         depends on MMU
 550         select CPU_FEROCEON
 551         select PCI
 552         select ARCH_REQUIRE_GPIOLIB
 553         select GENERIC_CLOCKEVENTS
 554         select PLAT_ORION
 555         help
 556           Support for the following Marvell Orion 5x series SoCs:
 557           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 558           Orion-2 (5281), Orion-1-90 (6183).
 559
 560 config ARCH_MMP
 561         bool "Marvell PXA168/910/MMP2"
 562         depends on MMU
 563         select ARCH_REQUIRE_GPIOLIB
 564         select CLKDEV_LOOKUP
 565         select GENERIC_CLOCKEVENTS
 566         select HAVE_SCHED_CLOCK
 567         select TICK_ONESHOT
 568         select PLAT_PXA
 569         select SPARSE_IRQ
 570         help
 571           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 572
 573 config ARCH_KS8695
 574         bool "Micrel/Kendin KS8695"
 575         select CPU_ARM922T
 576         select ARCH_REQUIRE_GPIOLIB
 577         select ARCH_USES_GETTIMEOFFSET
 578         help
 579           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 580           System-on-Chip devices.
 581
 582 config ARCH_W90X900
 583         bool "Nuvoton W90X900 CPU"
 584         select CPU_ARM926T
 585         select ARCH_REQUIRE_GPIOLIB
 586         select CLKDEV_LOOKUP
 587         select CLKSRC_MMIO
 588         select GENERIC_CLOCKEVENTS
 589         help
 590           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 591           At present, the w90x900 has been renamed nuc900, regarding
 592           the ARM series product line, you can login the following
 593           link address to know more.
 594
 595           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 596                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 597
 598 config ARCH_NUC93X
 599         bool "Nuvoton NUC93X CPU"
 600         select CPU_ARM926T
 601         select CLKDEV_LOOKUP
 602         help
 603           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 604           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 605
 606 config ARCH_TEGRA
 607         bool "NVIDIA Tegra"
 608         select CLKDEV_LOOKUP
 609         select CLKSRC_MMIO
 610         select GENERIC_TIME
 611         select GENERIC_CLOCKEVENTS
 612         select GENERIC_GPIO
 613         select HAVE_CLK
 614         select HAVE_SCHED_CLOCK
 615         select ARCH_HAS_CPUFREQ
 616         help
 617           This enables support for NVIDIA Tegra based systems (Tegra APX,
 618           Tegra 6xx and Tegra 2 series).
 619
 620 config ARCH_PNX4008
 621         bool "Philips Nexperia PNX4008 Mobile"
 622         select CPU_ARM926T
 623         select CLKDEV_LOOKUP
 624         select ARCH_USES_GETTIMEOFFSET
 625         help
 626           This enables support for Philips PNX4008 mobile platform.
 627
 628 config ARCH_PXA
 629         bool "PXA2xx/PXA3xx-based"
 630         depends on MMU
 631         select ARCH_MTD_XIP
 632         select ARCH_HAS_CPUFREQ
 633         select CLKDEV_LOOKUP
 634         select CLKSRC_MMIO
 635         select ARCH_REQUIRE_GPIOLIB
 636         select GENERIC_CLOCKEVENTS
 637         select HAVE_SCHED_CLOCK
 638         select TICK_ONESHOT
 639         select PLAT_PXA
 640         select SPARSE_IRQ
 641         select AUTO_ZRELADDR
 642         select MULTI_IRQ_HANDLER
 643         help
 644           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 645
 646 config ARCH_MSM
 647         bool "Qualcomm MSM"
 648         select HAVE_CLK
 649         select GENERIC_CLOCKEVENTS
 650         select ARCH_REQUIRE_GPIOLIB
 651         select CLKDEV_LOOKUP
 652         help
 653           Support for Qualcomm MSM/QSD based systems.  This runs on the
 654           apps processor of the MSM/QSD and depends on a shared memory
 655           interface to the modem processor which runs the baseband
 656           stack and controls some vital subsystems
 657           (clock and power control, etc).
 658
 659 config ARCH_SHMOBILE
 660         bool "Renesas SH-Mobile / R-Mobile"
 661         select HAVE_CLK
 662         select CLKDEV_LOOKUP
 663         select HAVE_MACH_CLKDEV
 664         select GENERIC_CLOCKEVENTS
 665         select NO_IOPORT
 666         select SPARSE_IRQ
 667         select MULTI_IRQ_HANDLER
 668         select PM_GENERIC_DOMAINS if PM
 669         help
 670           Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
 671
 672 config ARCH_RPC
 673         bool "RiscPC"
 674         select ARCH_ACORN
 675         select FIQ
 676         select TIMER_ACORN
 677         select ARCH_MAY_HAVE_PC_FDC
 678         select HAVE_PATA_PLATFORM
 679         select ISA_DMA_API
 680         select NO_IOPORT
 681         select ARCH_SPARSEMEM_ENABLE
 682         select ARCH_USES_GETTIMEOFFSET
 683         help
 684           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 685           CD-ROM interface, serial and parallel port, and the floppy drive.
 686
 687 config ARCH_SA1100
 688         bool "SA1100-based"
 689         select CLKSRC_MMIO
 690         select CPU_SA1100
 691         select ISA
 692         select ARCH_SPARSEMEM_ENABLE
 693         select ARCH_MTD_XIP
 694         select ARCH_HAS_CPUFREQ
 695         select CPU_FREQ
 696         select GENERIC_CLOCKEVENTS
 697         select HAVE_CLK
 698         select HAVE_SCHED_CLOCK
 699         select TICK_ONESHOT
 700         select ARCH_REQUIRE_GPIOLIB
 701         help
 702           Support for StrongARM 11x0 based boards.
 703
 704 config ARCH_S3C2410
 705         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
 706         select GENERIC_GPIO
 707         select ARCH_HAS_CPUFREQ
 708         select HAVE_CLK
 709         select CLKDEV_LOOKUP
 710         select ARCH_USES_GETTIMEOFFSET
 711         select HAVE_S3C2410_I2C if I2C
 712         help
 713           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 714           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 715           the Samsung SMDK2410 development board (and derivatives).
 716
 717           Note, the S3C2416 and the S3C2450 are so close that they even share
 718           the same SoC ID code. This means that there is no separate machine
 719           directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
 720
 721 config ARCH_S3C64XX
 722         bool "Samsung S3C64XX"
 723         select PLAT_SAMSUNG
 724         select CPU_V6
 725         select ARM_VIC
 726         select HAVE_CLK
 727         select CLKDEV_LOOKUP
 728         select NO_IOPORT
 729         select ARCH_USES_GETTIMEOFFSET
 730         select ARCH_HAS_CPUFREQ
 731         select ARCH_REQUIRE_GPIOLIB
 732         select SAMSUNG_CLKSRC
 733         select SAMSUNG_IRQ_VIC_TIMER
 734         select SAMSUNG_IRQ_UART
 735         select S3C_GPIO_TRACK
 736         select S3C_GPIO_PULL_UPDOWN
 737         select S3C_GPIO_CFG_S3C24XX
 738         select S3C_GPIO_CFG_S3C64XX
 739         select S3C_DEV_NAND
 740         select USB_ARCH_HAS_OHCI
 741         select SAMSUNG_GPIOLIB_4BIT
 742         select HAVE_S3C2410_I2C if I2C
 743         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 744         help
 745           Samsung S3C64XX series based systems
 746
 747 config ARCH_S5P64X0
 748         bool "Samsung S5P6440 S5P6450"
 749         select CPU_V6
 750         select GENERIC_GPIO
 751         select HAVE_CLK
 752         select CLKDEV_LOOKUP
 753         select CLKSRC_MMIO
 754         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 755         select GENERIC_CLOCKEVENTS
 756         select HAVE_SCHED_CLOCK
 757         select HAVE_S3C2410_I2C if I2C
 758         select HAVE_S3C_RTC if RTC_CLASS
 759         help
 760           Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
 761           SMDK6450.
 762
 763 config ARCH_S5PC100
 764         bool "Samsung S5PC100"
 765         select GENERIC_GPIO
 766         select HAVE_CLK
 767         select CLKDEV_LOOKUP
 768         select CPU_V7
 769         select ARM_L1_CACHE_SHIFT_6
 770         select ARCH_USES_GETTIMEOFFSET
 771         select HAVE_S3C2410_I2C if I2C
 772         select HAVE_S3C_RTC if RTC_CLASS
 773         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 774         help
 775           Samsung S5PC100 series based systems
 776
 777 config ARCH_S5PV210
 778         bool "Samsung S5PV210/S5PC110"
 779         select CPU_V7
 780         select ARCH_SPARSEMEM_ENABLE
 781         select ARCH_HAS_HOLES_MEMORYMODEL
 782         select GENERIC_GPIO
 783         select HAVE_CLK
 784         select CLKDEV_LOOKUP
 785         select CLKSRC_MMIO
 786         select ARM_L1_CACHE_SHIFT_6
 787         select ARCH_HAS_CPUFREQ
 788         select GENERIC_CLOCKEVENTS
 789         select HAVE_SCHED_CLOCK
 790         select HAVE_S3C2410_I2C if I2C
 791         select HAVE_S3C_RTC if RTC_CLASS
 792         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 793         help
 794           Samsung S5PV210/S5PC110 series based systems
 795
 796 config ARCH_EXYNOS4
 797         bool "Samsung EXYNOS4"
 798         select CPU_V7
 799         select ARCH_SPARSEMEM_ENABLE
 800         select ARCH_HAS_HOLES_MEMORYMODEL
 801         select GENERIC_GPIO
 802         select HAVE_CLK
 803         select CLKDEV_LOOKUP
 804         select ARCH_HAS_CPUFREQ
 805         select GENERIC_CLOCKEVENTS
 806         select HAVE_S3C_RTC if RTC_CLASS
 807         select HAVE_S3C2410_I2C if I2C
 808         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 809         help
 810           Samsung EXYNOS4 series based systems
 811
 812 config ARCH_SHARK
 813         bool "Shark"
 814         select CPU_SA110
 815         select ISA
 816         select ISA_DMA
 817         select ZONE_DMA
 818         select PCI
 819         select ARCH_USES_GETTIMEOFFSET
 820         help
 821           Support for the StrongARM based Digital DNARD machine, also known
 822           as "Shark" (<http://www.shark-linux.de/shark.html>).
 823
 824 config ARCH_TCC_926
 825         bool "Telechips TCC ARM926-based systems"
 826         select CLKSRC_MMIO
 827         select CPU_ARM926T
 828         select HAVE_CLK
 829         select CLKDEV_LOOKUP
 830         select GENERIC_CLOCKEVENTS
 831         help
 832           Support for Telechips TCC ARM926-based systems.
 833
 834 config ARCH_U300
 835         bool "ST-Ericsson U300 Series"
 836         depends on MMU
 837         select CLKSRC_MMIO
 838         select CPU_ARM926T
 839         select HAVE_SCHED_CLOCK
 840         select HAVE_TCM
 841         select ARM_AMBA
 842         select ARM_VIC
 843         select GENERIC_CLOCKEVENTS
 844         select CLKDEV_LOOKUP
 845         select HAVE_MACH_CLKDEV
 846         select GENERIC_GPIO
 847         help
 848           Support for ST-Ericsson U300 series mobile platforms.
 849
 850 config ARCH_U8500
 851         bool "ST-Ericsson U8500 Series"
 852         select CPU_V7
 853         select ARM_AMBA
 854         select GENERIC_CLOCKEVENTS
 855         select CLKDEV_LOOKUP
 856         select ARCH_REQUIRE_GPIOLIB
 857         select ARCH_HAS_CPUFREQ
 858         help
 859           Support for ST-Ericsson's Ux500 architecture
 860
 861 config ARCH_NOMADIK
 862         bool "STMicroelectronics Nomadik"
 863         select ARM_AMBA
 864         select ARM_VIC
 865         select CPU_ARM926T
 866         select CLKDEV_LOOKUP
 867         select GENERIC_CLOCKEVENTS
 868         select ARCH_REQUIRE_GPIOLIB
 869         help
 870           Support for the Nomadik platform by ST-Ericsson
 871
 872 config ARCH_DAVINCI
 873         bool "TI DaVinci"
 874         select GENERIC_CLOCKEVENTS
 875         select ARCH_REQUIRE_GPIOLIB
 876         select ZONE_DMA
 877         select HAVE_IDE
 878         select CLKDEV_LOOKUP
 879         select GENERIC_ALLOCATOR
 880         select GENERIC_IRQ_CHIP
 881         select ARCH_HAS_HOLES_MEMORYMODEL
 882         help
 883           Support for TI's DaVinci platform.
 884
 885 config ARCH_OMAP
 886         bool "TI OMAP"
 887         select HAVE_CLK
 888         select ARCH_REQUIRE_GPIOLIB
 889         select ARCH_HAS_CPUFREQ
 890         select CLKSRC_MMIO
 891         select GENERIC_CLOCKEVENTS
 892         select HAVE_SCHED_CLOCK
 893         select ARCH_HAS_HOLES_MEMORYMODEL
 894         help
 895           Support for TI's OMAP platform (OMAP1/2/3/4).
 896
 897 config PLAT_SPEAR
 898         bool "ST SPEAr"
 899         select ARM_AMBA
 900         select ARCH_REQUIRE_GPIOLIB
 901         select CLKDEV_LOOKUP
 902         select CLKSRC_MMIO
 903         select GENERIC_CLOCKEVENTS
 904         select HAVE_CLK
 905         help
 906           Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
 907
 908 config ARCH_VT8500
 909         bool "VIA/WonderMedia 85xx"
 910         select CPU_ARM926T
 911         select GENERIC_GPIO
 912         select ARCH_HAS_CPUFREQ
 913         select GENERIC_CLOCKEVENTS
 914         select ARCH_REQUIRE_GPIOLIB
 915         select HAVE_PWM
 916         help
 917           Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
 918
 919 config ARCH_ZYNQ
 920         bool "Xilinx Zynq ARM Cortex A9 Platform"
 921         select CPU_V7
 922         select GENERIC_TIME
 923         select GENERIC_CLOCKEVENTS
 924         select CLKDEV_LOOKUP
 925         select ARM_GIC
 926         select ARM_AMBA
 927         select ICST
 928         select USE_OF
 929         help
 930           Support for Xilinx Zynq ARM Cortex A9 Platform
 931 endchoice
 932
 933 #
 934 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 935 # Kconfigs may be included either alphabetically (according to the
 936 # plat- suffix) or along side the corresponding mach-* source.
 937 #
 938 source "arch/arm/mach-at91/Kconfig"
 939
 940 source "arch/arm/mach-bcmring/Kconfig"
 941
 942 source "arch/arm/mach-clps711x/Kconfig"
 943
 944 source "arch/arm/mach-cns3xxx/Kconfig"
 945
 946 source "arch/arm/mach-davinci/Kconfig"
 947
 948 source "arch/arm/mach-dove/Kconfig"
 949
 950 source "arch/arm/mach-ep93xx/Kconfig"
 951
 952 source "arch/arm/mach-footbridge/Kconfig"
 953
 954 source "arch/arm/mach-gemini/Kconfig"
 955
 956 source "arch/arm/mach-h720x/Kconfig"
 957
 958 source "arch/arm/mach-integrator/Kconfig"
 959
 960 source "arch/arm/mach-iop32x/Kconfig"
 961
 962 source "arch/arm/mach-iop33x/Kconfig"
 963
 964 source "arch/arm/mach-iop13xx/Kconfig"
 965
 966 source "arch/arm/mach-ixp4xx/Kconfig"
 967
 968 source "arch/arm/mach-ixp2000/Kconfig"
 969
 970 source "arch/arm/mach-ixp23xx/Kconfig"
 971
 972 source "arch/arm/mach-kirkwood/Kconfig"
 973
 974 source "arch/arm/mach-ks8695/Kconfig"
 975
 976 source "arch/arm/mach-lpc32xx/Kconfig"
 977
 978 source "arch/arm/mach-msm/Kconfig"
 979
 980 source "arch/arm/mach-mv78xx0/Kconfig"
 981
 982 source "arch/arm/plat-mxc/Kconfig"
 983
 984 source "arch/arm/mach-mxs/Kconfig"
 985
 986 source "arch/arm/mach-netx/Kconfig"
 987
 988 source "arch/arm/mach-nomadik/Kconfig"
 989 source "arch/arm/plat-nomadik/Kconfig"
 990
 991 source "arch/arm/mach-nuc93x/Kconfig"
 992
 993 source "arch/arm/plat-omap/Kconfig"
 994
 995 source "arch/arm/mach-omap1/Kconfig"
 996
 997 source "arch/arm/mach-omap2/Kconfig"
 998
 999 source "arch/arm/mach-orion5x/Kconfig"
1000
1001 source "arch/arm/mach-pxa/Kconfig"
1002 source "arch/arm/plat-pxa/Kconfig"
1003
1004 source "arch/arm/mach-mmp/Kconfig"
1005
1006 source "arch/arm/mach-realview/Kconfig"
1007
1008 source "arch/arm/mach-sa1100/Kconfig"
1009
1010 source "arch/arm/plat-samsung/Kconfig"
1011 source "arch/arm/plat-s3c24xx/Kconfig"
1012 source "arch/arm/plat-s5p/Kconfig"
1013
1014 source "arch/arm/plat-spear/Kconfig"
1015
1016 source "arch/arm/plat-tcc/Kconfig"
1017
1018 if ARCH_S3C2410
1019 source "arch/arm/mach-s3c2410/Kconfig"
1020 source "arch/arm/mach-s3c2412/Kconfig"
1021 source "arch/arm/mach-s3c2416/Kconfig"
1022 source "arch/arm/mach-s3c2440/Kconfig"
1023 source "arch/arm/mach-s3c2443/Kconfig"
1024 endif
1025
1026 if ARCH_S3C64XX
1027 source "arch/arm/mach-s3c64xx/Kconfig"
1028 endif
1029
1030 source "arch/arm/mach-s5p64x0/Kconfig"
1031
1032 source "arch/arm/mach-s5pc100/Kconfig"
1033
1034 source "arch/arm/mach-s5pv210/Kconfig"
1035
1036 source "arch/arm/mach-exynos4/Kconfig"
1037
1038 source "arch/arm/mach-shmobile/Kconfig"
1039
1040 source "arch/arm/mach-tegra/Kconfig"
1041
1042 source "arch/arm/mach-u300/Kconfig"
1043
1044 source "arch/arm/mach-ux500/Kconfig"
1045
1046 source "arch/arm/mach-versatile/Kconfig"
1047
1048 source "arch/arm/mach-vexpress/Kconfig"
1049 source "arch/arm/plat-versatile/Kconfig"
1050
1051 source "arch/arm/mach-vt8500/Kconfig"
1052
1053 source "arch/arm/mach-w90x900/Kconfig"
1054
1055 # Definitions to make life easier
1056 config ARCH_ACORN
1057         bool
1058
1059 config PLAT_IOP
1060         bool
1061         select GENERIC_CLOCKEVENTS
1062         select HAVE_SCHED_CLOCK
1063
1064 config PLAT_ORION
1065         bool
1066         select CLKSRC_MMIO
1067         select GENERIC_IRQ_CHIP
1068         select HAVE_SCHED_CLOCK
1069
1070 config PLAT_PXA
1071         bool
1072
1073 config PLAT_VERSATILE
1074         bool
1075
1076 config ARM_TIMER_SP804
1077         bool
1078         select CLKSRC_MMIO
1079
1080 source arch/arm/mm/Kconfig
1081
1082 config IWMMXT
1083         bool "Enable iWMMXt support"
1084         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1085         default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
1086         help
1087           Enable support for iWMMXt context switching at run time if
1088           running on a CPU that supports it.
1089
1090 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
1091 config XSCALE_PMU
1092         bool
1093         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
1094         default y
1095
1096 config CPU_HAS_PMU
1097         depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
1098                    (!ARCH_OMAP3 || OMAP3_EMU)
1099         default y
1100         bool
1101
1102 config MULTI_IRQ_HANDLER
1103         bool
1104         help
1105           Allow each machine to specify it's own IRQ handler at run time.
1106
1107 if !MMU
1108 source "arch/arm/Kconfig-nommu"
1109 endif
1110
1111 config ARM_ERRATA_411920
1112         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1113         depends on CPU_V6 || CPU_V6K
1114         help
1115           Invalidation of the Instruction Cache operation can
1116           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1117           It does not affect the MPCore. This option enables the ARM Ltd.
1118           recommended workaround.
1119
1120 config ARM_ERRATA_430973
1121         bool "ARM errata: Stale prediction on replaced interworking branch"
1122         depends on CPU_V7
1123         help
1124           This option enables the workaround for the 430973 Cortex-A8
1125           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1126           interworking branch is replaced with another code sequence at the
1127           same virtual address, whether due to self-modifying code or virtual
1128           to physical address re-mapping, Cortex-A8 does not recover from the
1129           stale interworking branch prediction. This results in Cortex-A8
1130           executing the new code sequence in the incorrect ARM or Thumb state.
1131           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1132           and also flushes the branch target cache at every context switch.
1133           Note that setting specific bits in the ACTLR register may not be
1134           available in non-secure mode.
1135
1136 config ARM_ERRATA_458693
1137         bool "ARM errata: Processor deadlock when a false hazard is created"
1138         depends on CPU_V7
1139         help
1140           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1141           erratum. For very specific sequences of memory operations, it is
1142           possible for a hazard condition intended for a cache line to instead
1143           be incorrectly associated with a different cache line. This false
1144           hazard might then cause a processor deadlock. The workaround enables
1145           the L1 caching of the NEON accesses and disables the PLD instruction
1146           in the ACTLR register. Note that setting specific bits in the ACTLR
1147           register may not be available in non-secure mode.
1148
1149 config ARM_ERRATA_460075
1150         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1151         depends on CPU_V7
1152         help
1153           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1154           erratum. Any asynchronous access to the L2 cache may encounter a
1155           situation in which recent store transactions to the L2 cache are lost
1156           and overwritten with stale memory contents from external memory. The
1157           workaround disables the write-allocate mode for the L2 cache via the
1158           ACTLR register. Note that setting specific bits in the ACTLR register
1159           may not be available in non-secure mode.
1160
1161 config ARM_ERRATA_742230
1162         bool "ARM errata: DMB operation may be faulty"
1163         depends on CPU_V7 && SMP
1164         help
1165           This option enables the workaround for the 742230 Cortex-A9
1166           (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1167           between two write operations may not ensure the correct visibility
1168           ordering of the two writes. This workaround sets a specific bit in
1169           the diagnostic register of the Cortex-A9 which causes the DMB
1170           instruction to behave as a DSB, ensuring the correct behaviour of
1171           the two writes.
1172
1173 config ARM_ERRATA_742231
1174         bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1175         depends on CPU_V7 && SMP
1176         help
1177           This option enables the workaround for the 742231 Cortex-A9
1178           (r2p0..r2p2) erratum. Under certain conditions, specific to the
1179           Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1180           accessing some data located in the same cache line, may get corrupted
1181           data due to bad handling of the address hazard when the line gets
1182           replaced from one of the CPUs at the same time as another CPU is
1183           accessing it. This workaround sets specific bits in the diagnostic
1184           register of the Cortex-A9 which reduces the linefill issuing
1185           capabilities of the processor.
1186
1187 config PL310_ERRATA_588369
1188         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1189         depends on CACHE_L2X0
1190         help
1191            The PL310 L2 cache controller implements three types of Clean &
1192            Invalidate maintenance operations: by Physical Address
1193            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1194            They are architecturally defined to behave as the execution of a
1195            clean operation followed immediately by an invalidate operation,
1196            both performing to the same memory location. This functionality
1197            is not correctly implemented in PL310 as clean lines are not
1198            invalidated as a result of these operations.
1199
1200 config ARM_ERRATA_720789
1201         bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1202         depends on CPU_V7 && SMP
1203         help
1204           This option enables the workaround for the 720789 Cortex-A9 (prior to
1205           r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1206           broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1207           As a consequence of this erratum, some TLB entries which should be
1208           invalidated are not, resulting in an incoherency in the system page
1209           tables. The workaround changes the TLB flushing routines to invalidate
1210           entries regardless of the ASID.
1211
1212 config PL310_ERRATA_727915
1213         bool "Background Clean & Invalidate by Way operation can cause data corruption"
1214         depends on CACHE_L2X0
1215         help
1216           PL310 implements the Clean & Invalidate by Way L2 cache maintenance
1217           operation (offset 0x7FC). This operation runs in background so that
1218           PL310 can handle normal accesses while it is in progress. Under very
1219           rare circumstances, due to this erratum, write data can be lost when
1220           PL310 treats a cacheable write transaction during a Clean &
1221           Invalidate by Way operation.
1222
1223 config ARM_ERRATA_743622
1224         bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1225         depends on CPU_V7
1226         help
1227           This option enables the workaround for the 743622 Cortex-A9
1228           (r2p0..r2p2) erratum. Under very rare conditions, a faulty
1229           optimisation in the Cortex-A9 Store Buffer may lead to data
1230           corruption. This workaround sets a specific bit in the diagnostic
1231           register of the Cortex-A9 which disables the Store Buffer
1232           optimisation, preventing the defect from occurring. This has no
1233           visible impact on the overall performance or power consumption of the
1234           processor.
1235
1236 config ARM_ERRATA_751472
1237         bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1238         depends on CPU_V7 && SMP
1239         help
1240           This option enables the workaround for the 751472 Cortex-A9 (prior
1241           to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1242           completion of a following broadcasted operation if the second
1243           operation is received by a CPU before the ICIALLUIS has completed,
1244           potentially leading to corrupted entries in the cache or TLB.
1245
1246 config ARM_ERRATA_753970
1247         bool "ARM errata: cache sync operation may be faulty"
1248         depends on CACHE_PL310
1249         help
1250           This option enables the workaround for the 753970 PL310 (r3p0) erratum.
1251
1252           Under some condition the effect of cache sync operation on
1253           the store buffer still remains when the operation completes.
1254           This means that the store buffer is always asked to drain and
1255           this prevents it from merging any further writes. The workaround
1256           is to replace the normal offset of cache sync operation (0x730)
1257           by another offset targeting an unmapped PL310 register 0x740.
1258           This has the same effect as the cache sync operation: store buffer
1259           drain and waiting for all buffers empty.
1260
1261 config ARM_ERRATA_754322
1262         bool "ARM errata: possible faulty MMU translations following an ASID switch"
1263         depends on CPU_V7
1264         help
1265           This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1266           r3p*) erratum. A speculative memory access may cause a page table walk
1267           which starts prior to an ASID switch but completes afterwards. This
1268           can populate the micro-TLB with a stale entry which may be hit with
1269           the new ASID. This workaround places two dsb instructions in the mm
1270           switching code so that no page table walks can cross the ASID switch.
1271
1272 config ARM_ERRATA_754327
1273         bool "ARM errata: no automatic Store Buffer drain"
1274         depends on CPU_V7 && SMP
1275         help
1276           This option enables the workaround for the 754327 Cortex-A9 (prior to
1277           r2p0) erratum. The Store Buffer does not have any automatic draining
1278           mechanism and therefore a livelock may occur if an external agent
1279           continuously polls a memory location waiting to observe an update.
1280           This workaround defines cpu_relax() as smp_mb(), preventing correctly
1281           written polling loops from denying visibility of updates to memory.
1282
1283 endmenu
1284
1285 source "arch/arm/common/Kconfig"
1286
1287 menu "Bus support"
1288
1289 config ARM_AMBA
1290         bool
1291
1292 config ISA
1293         bool
1294         help
1295           Find out whether you have ISA slots on your motherboard.  ISA is the
1296           name of a bus system, i.e. the way the CPU talks to the other stuff
1297           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1298           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1299           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1300
1301 # Select ISA DMA controller support
1302 config ISA_DMA
1303         bool
1304         select ISA_DMA_API
1305
1306 # Select ISA DMA interface
1307 config ISA_DMA_API
1308         bool
1309
1310 config PCI
1311         bool "PCI support" if MIGHT_HAVE_PCI
1312         help
1313           Find out whether you have a PCI motherboard. PCI is the name of a
1314           bus system, i.e. the way the CPU talks to the other stuff inside
1315           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1316           VESA. If you have PCI, say Y, otherwise N.
1317
1318 config PCI_DOMAINS
1319         bool
1320         depends on PCI
1321
1322 config PCI_NANOENGINE
1323         bool "BSE nanoEngine PCI support"
1324         depends on SA1100_NANOENGINE
1325         help
1326           Enable PCI on the BSE nanoEngine board.
1327
1328 config PCI_SYSCALL
1329         def_bool PCI
1330
1331 # Select the host bridge type
1332 config PCI_HOST_VIA82C505
1333         bool
1334         depends on PCI && ARCH_SHARK
1335         default y
1336
1337 config PCI_HOST_ITE8152
1338         bool
1339         depends on PCI && MACH_ARMCORE
1340         default y
1341         select DMABOUNCE
1342
1343 source "drivers/pci/Kconfig"
1344
1345 source "drivers/pcmcia/Kconfig"
1346
1347 endmenu
1348
1349 menu "Kernel Features"
1350
1351 source "kernel/time/Kconfig"
1352
1353 config SMP
1354         bool "Symmetric Multi-Processing"
1355         depends on CPU_V6K || CPU_V7
1356         depends on GENERIC_CLOCKEVENTS
1357         depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
1358                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
1359                  ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
1360                  ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
1361         select USE_GENERIC_SMP_HELPERS
1362         select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
1363         help
1364           This enables support for systems with more than one CPU. If you have
1365           a system with only one CPU, like most personal computers, say N. If
1366           you have a system with more than one CPU, say Y.
1367
1368           If you say N here, the kernel will run on single and multiprocessor
1369           machines, but will use only one CPU of a multiprocessor machine. If
1370           you say Y here, the kernel will run on many, but not all, single
1371           processor machines. On a single processor machine, the kernel will
1372           run faster if you say N here.
1373
1374           See also <file:Documentation/i386/IO-APIC.txt>,
1375           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1376           <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1377
1378           If you don't know what to do here, say N.
1379
1380 config SMP_ON_UP
1381         bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1382         depends on EXPERIMENTAL
1383         depends on SMP && !XIP_KERNEL
1384         default y
1385         help
1386           SMP kernels contain instructions which fail on non-SMP processors.
1387           Enabling this option allows the kernel to modify itself to make
1388           these instructions safe.  Disabling it allows about 1K of space
1389           savings.
1390
1391           If you don't know what to do here, say Y.
1392
1393 config HAVE_ARM_SCU
1394         bool
1395         help
1396           This option enables support for the ARM system coherency unit
1397
1398 config HAVE_ARM_TWD
1399         bool
1400         depends on SMP
1401         select TICK_ONESHOT
1402         help
1403           This options enables support for the ARM timer and watchdog unit
1404
1405 choice
1406         prompt "Memory split"
1407         default VMSPLIT_3G
1408         help
1409           Select the desired split between kernel and user memory.
1410
1411           If you are not absolutely sure what you are doing, leave this
1412           option alone!
1413
1414         config VMSPLIT_3G
1415                 bool "3G/1G user/kernel split"
1416         config VMSPLIT_2G
1417                 bool "2G/2G user/kernel split"
1418         config VMSPLIT_1G
1419                 bool "1G/3G user/kernel split"
1420 endchoice
1421
1422 config PAGE_OFFSET
1423         hex
1424         default 0x40000000 if VMSPLIT_1G
1425         default 0x80000000 if VMSPLIT_2G
1426         default 0xC0000000
1427
1428 config NR_CPUS
1429         int "Maximum number of CPUs (2-32)"
1430         range 2 32
1431         depends on SMP
1432         default "4"
1433
1434 config HOTPLUG_CPU
1435         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1436         depends on SMP && HOTPLUG && EXPERIMENTAL
1437         help
1438           Say Y here to experiment with turning CPUs off and on.  CPUs
1439           can be controlled through /sys/devices/system/cpu.
1440
1441 config LOCAL_TIMERS
1442         bool "Use local timer interrupts"
1443         depends on SMP
1444         default y
1445         select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
1446         help
1447           Enable support for local timers on SMP platforms, rather then the
1448           legacy IPI broadcast method.  Local timers allows the system
1449           accounting to be spread across the timer interval, preventing a
1450           "thundering herd" at every timer tick.
1451
1452 source kernel/Kconfig.preempt
1453
1454 config HZ
1455         int
1456         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
1457                 ARCH_S5PV210 || ARCH_EXYNOS4
1458         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1459         default AT91_TIMER_HZ if ARCH_AT91
1460         default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1461         default 100
1462
1463 config THUMB2_KERNEL
1464         bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
1465         depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
1466         select AEABI
1467         select ARM_ASM_UNIFIED
1468         help
1469           By enabling this option, the kernel will be compiled in
1470           Thumb-2 mode. A compiler/assembler that understand the unified
1471           ARM-Thumb syntax is needed.
1472
1473           If unsure, say N.
1474
1475 config THUMB2_AVOID_R_ARM_THM_JUMP11
1476         bool "Work around buggy Thumb-2 short branch relocations in gas"
1477         depends on THUMB2_KERNEL && MODULES
1478         default y
1479         help
1480           Various binutils versions can resolve Thumb-2 branches to
1481           locally-defined, preemptible global symbols as short-range "b.n"
1482           branch instructions.
1483
1484           This is a problem, because there's no guarantee the final
1485           destination of the symbol, or any candidate locations for a
1486           trampoline, are within range of the branch.  For this reason, the
1487           kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1488           relocation in modules at all, and it makes little sense to add
1489           support.
1490
1491           The symptom is that the kernel fails with an "unsupported
1492           relocation" error when loading some modules.
1493
1494           Until fixed tools are available, passing
1495           -fno-optimize-sibling-calls to gcc should prevent gcc generating
1496           code which hits this problem, at the cost of a bit of extra runtime
1497           stack usage in some cases.
1498
1499           The problem is described in more detail at:
1500               https://bugs.launchpad.net/binutils-linaro/+bug/725126
1501
1502           Only Thumb-2 kernels are affected.
1503
1504           Unless you are sure your tools don't have this problem, say Y.
1505
1506 config ARM_ASM_UNIFIED
1507         bool
1508
1509 config AEABI
1510         bool "Use the ARM EABI to compile the kernel"
1511         help
1512           This option allows for the kernel to be compiled using the latest
1513           ARM ABI (aka EABI).  This is only useful if you are using a user
1514           space environment that is also compiled with EABI.
1515
1516           Since there are major incompatibilities between the legacy ABI and
1517           EABI, especially with regard to structure member alignment, this
1518           option also changes the kernel syscall calling convention to
1519           disambiguate both ABIs and allow for backward compatibility support
1520           (selected with CONFIG_OABI_COMPAT).
1521
1522           To use this you need GCC version 4.0.0 or later.
1523
1524 config OABI_COMPAT
1525         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1526         depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
1527         default y
1528         help
1529           This option preserves the old syscall interface along with the
1530           new (ARM EABI) one. It also provides a compatibility layer to
1531           intercept syscalls that have structure arguments which layout
1532           in memory differs between the legacy ABI and the new ARM EABI
1533           (only for non "thumb" binaries). This option adds a tiny
1534           overhead to all syscalls and produces a slightly larger kernel.
1535           If you know you'll be using only pure EABI user space then you
1536           can say N here. If this option is not selected and you attempt
1537           to execute a legacy ABI binary then the result will be
1538           UNPREDICTABLE (in fact it can be predicted that it won't work
1539           at all). If in doubt say Y.
1540
1541 config ARCH_HAS_HOLES_MEMORYMODEL
1542         bool
1543
1544 config ARCH_SPARSEMEM_ENABLE
1545         bool
1546
1547 config ARCH_SPARSEMEM_DEFAULT
1548         def_bool ARCH_SPARSEMEM_ENABLE
1549
1550 config ARCH_SELECT_MEMORY_MODEL
1551         def_bool ARCH_SPARSEMEM_ENABLE
1552
1553 config HAVE_ARCH_PFN_VALID
1554         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1555
1556 config HIGHMEM
1557         bool "High Memory Support"
1558         depends on MMU
1559         help
1560           The address space of ARM processors is only 4 Gigabytes large
1561           and it has to accommodate user address space, kernel address
1562           space as well as some memory mapped IO. That means that, if you
1563           have a large amount of physical memory and/or IO, not all of the
1564           memory can be "permanently mapped" by the kernel. The physical
1565           memory that is not permanently mapped is called "high memory".
1566
1567           Depending on the selected kernel/user memory split, minimum
1568           vmalloc space and actual amount of RAM, you may not need this
1569           option which should result in a slightly faster kernel.
1570
1571           If unsure, say n.
1572
1573 config HIGHPTE
1574         bool "Allocate 2nd-level pagetables from highmem"
1575         depends on HIGHMEM
1576
1577 config HW_PERF_EVENTS
1578         bool "Enable hardware performance counter support for perf events"
1579         depends on PERF_EVENTS && CPU_HAS_PMU
1580         default y
1581         help
1582           Enable hardware performance counter support for perf events. If
1583           disabled, perf events will use software events only.
1584
1585 source "mm/Kconfig"
1586
1587 config FORCE_MAX_ZONEORDER
1588         int "Maximum zone order" if ARCH_SHMOBILE
1589         range 11 64 if ARCH_SHMOBILE
1590         default "9" if SA1111
1591         default "11"
1592         help
1593           The kernel memory allocator divides physically contiguous memory
1594           blocks into "zones", where each zone is a power of two number of
1595           pages.  This option selects the largest power of two that the kernel
1596           keeps in the memory allocator.  If you need to allocate very large
1597           blocks of physically contiguous memory, then you may need to
1598           increase this value.
1599
1600           This config option is actually maximum order plus one. For example,
1601           a value of 11 means that the largest free memory block is 2^10 pages.
1602
1603 config LEDS
1604         bool "Timer and CPU usage LEDs"
1605         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1606                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1607                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1608                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1609                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1610                    ARCH_AT91 || ARCH_DAVINCI || \
1611                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1612         help
1613           If you say Y here, the LEDs on your machine will be used
1614           to provide useful information about your current system status.
1615
1616           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1617           be able to select which LEDs are active using the options below. If
1618           you are compiling a kernel for the EBSA-110 or the LART however, the
1619           red LED will simply flash regularly to indicate that the system is
1620           still functional. It is safe to say Y here if you have a CATS
1621           system, but the driver will do nothing.
1622
1623 config LEDS_TIMER
1624         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1625                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1626                             || MACH_OMAP_PERSEUS2
1627         depends on LEDS
1628         depends on !GENERIC_CLOCKEVENTS
1629         default y if ARCH_EBSA110
1630         help
1631           If you say Y here, one of the system LEDs (the green one on the
1632           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1633           will flash regularly to indicate that the system is still
1634           operational. This is mainly useful to kernel hackers who are
1635           debugging unstable kernels.
1636
1637           The LART uses the same LED for both Timer LED and CPU usage LED
1638           functions. You may choose to use both, but the Timer LED function
1639           will overrule the CPU usage LED.
1640
1641 config LEDS_CPU
1642         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1643                         !ARCH_OMAP) \
1644                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1645                         || MACH_OMAP_PERSEUS2
1646         depends on LEDS
1647         help
1648           If you say Y here, the red LED will be used to give a good real
1649           time indication of CPU usage, by lighting whenever the idle task
1650           is not currently executing.
1651
1652           The LART uses the same LED for both Timer LED and CPU usage LED
1653           functions. You may choose to use both, but the Timer LED function
1654           will overrule the CPU usage LED.
1655
1656 config ALIGNMENT_TRAP
1657         bool
1658         depends on CPU_CP15_MMU
1659         default y if !ARCH_EBSA110
1660         select HAVE_PROC_CPU if PROC_FS
1661         help
1662           ARM processors cannot fetch/store information which is not
1663           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1664           address divisible by 4. On 32-bit ARM processors, these non-aligned
1665           fetch/store instructions will be emulated in software if you say
1666           here, which has a severe performance impact. This is necessary for
1667           correct operation of some network protocols. With an IP-only
1668           configuration it is safe to say N, otherwise say Y.
1669
1670 config UACCESS_WITH_MEMCPY
1671         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1672         depends on MMU && EXPERIMENTAL
1673         default y if CPU_FEROCEON
1674         help
1675           Implement faster copy_to_user and clear_user methods for CPU
1676           cores where a 8-word STM instruction give significantly higher
1677           memory write throughput than a sequence of individual 32bit stores.
1678
1679           A possible side effect is a slight increase in scheduling latency
1680           between threads sharing the same address space if they invoke
1681           such copy operations with large buffers.
1682
1683           However, if the CPU data cache is using a write-allocate mode,
1684           this option is unlikely to provide any performance gain.
1685
1686 config SECCOMP
1687         bool
1688         prompt "Enable seccomp to safely compute untrusted bytecode"
1689         ---help---
1690           This kernel feature is useful for number crunching applications
1691           that may need to compute untrusted bytecode during their
1692           execution. By using pipes or other transports made available to
1693           the process as file descriptors supporting the read/write
1694           syscalls, it's possible to isolate those applications in
1695           their own address space using seccomp. Once seccomp is
1696           enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1697           and the task is only allowed to execute a few safe syscalls
1698           defined by each seccomp mode.
1699
1700 config CC_STACKPROTECTOR
1701         bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1702         depends on EXPERIMENTAL
1703         help
1704           This option turns on the -fstack-protector GCC feature. This
1705           feature puts, at the beginning of functions, a canary value on
1706           the stack just before the return address, and validates
1707           the value just before actually returning.  Stack based buffer
1708           overflows (that need to overwrite this return address) now also
1709           overwrite the canary, which gets detected and the attack is then
1710           neutralized via a kernel panic.
1711           This feature requires gcc version 4.2 or above.
1712
1713 config DEPRECATED_PARAM_STRUCT
1714         bool "Provide old way to pass kernel parameters"
1715         help
1716           This was deprecated in 2001 and announced to live on for 5 years.
1717           Some old boot loaders still use this way.
1718
1719 endmenu
1720
1721 menu "Boot options"
1722
1723 config USE_OF
1724         bool "Flattened Device Tree support"
1725         select OF
1726         select OF_EARLY_FLATTREE
1727         select IRQ_DOMAIN
1728         help
1729           Include support for flattened device tree machine descriptions.
1730
1731 # Compressed boot loader in ROM.  Yes, we really want to ask about
1732 # TEXT and BSS so we preserve their values in the config files.
1733 config ZBOOT_ROM_TEXT
1734         hex "Compressed ROM boot loader base address"
1735         default "0"
1736         help
1737           The physical address at which the ROM-able zImage is to be
1738           placed in the target.  Platforms which normally make use of
1739           ROM-able zImage formats normally set this to a suitable
1740           value in their defconfig file.
1741
1742           If ZBOOT_ROM is not enabled, this has no effect.
1743
1744 config ZBOOT_ROM_BSS
1745         hex "Compressed ROM boot loader BSS address"
1746         default "0"
1747         help
1748           The base address of an area of read/write memory in the target
1749           for the ROM-able zImage which must be available while the
1750           decompressor is running. It must be large enough to hold the
1751           entire decompressed kernel plus an additional 128 KiB.
1752           Platforms which normally make use of ROM-able zImage formats
1753           normally set this to a suitable value in their defconfig file.
1754
1755           If ZBOOT_ROM is not enabled, this has no effect.
1756
1757 config ZBOOT_ROM
1758         bool "Compressed boot loader in ROM/flash"
1759         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1760         help
1761           Say Y here if you intend to execute your compressed kernel image
1762           (zImage) directly from ROM or flash.  If unsure, say N.
1763
1764 choice
1765         prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1766         depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
1767         default ZBOOT_ROM_NONE
1768         help
1769           Include experimental SD/MMC loading code in the ROM-able zImage.
1770           With this enabled it is possible to write the the ROM-able zImage
1771           kernel image to an MMC or SD card and boot the kernel straight
1772           from the reset vector. At reset the processor Mask ROM will load
1773           the first part of the the ROM-able zImage which in turn loads the
1774           rest the kernel image to RAM.
1775
1776 config ZBOOT_ROM_NONE
1777         bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1778         help
1779           Do not load image from SD or MMC
1780
1781 config ZBOOT_ROM_MMCIF
1782         bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
1783         help
1784           Load image from MMCIF hardware block.
1785
1786 config ZBOOT_ROM_SH_MOBILE_SDHI
1787         bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1788         help
1789           Load image from SDHI hardware block
1790
1791 endchoice
1792
1793 config CMDLINE
1794         string "Default kernel command string"
1795         default ""
1796         help
1797           On some architectures (EBSA110 and CATS), there is currently no way
1798           for the boot loader to pass arguments to the kernel. For these
1799           architectures, you should supply some command-line options at build
1800           time by entering them here. As a minimum, you should specify the
1801           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1802
1803 choice
1804         prompt "Kernel command line type" if CMDLINE != ""
1805         default CMDLINE_FROM_BOOTLOADER
1806
1807 config CMDLINE_FROM_BOOTLOADER
1808         bool "Use bootloader kernel arguments if available"
1809         help
1810           Uses the command-line options passed by the boot loader. If
1811           the boot loader doesn't provide any, the default kernel command
1812           string provided in CMDLINE will be used.
1813
1814 config CMDLINE_EXTEND
1815         bool "Extend bootloader kernel arguments"
1816         help
1817           The command-line arguments provided by the boot loader will be
1818           appended to the default kernel command string.
1819
1820 config CMDLINE_FORCE
1821         bool "Always use the default kernel command string"
1822         help
1823           Always use the default kernel command string, even if the boot
1824           loader passes other arguments to the kernel.
1825           This is useful if you cannot or don't want to change the
1826           command-line options your boot loader passes to the kernel.
1827 endchoice
1828
1829 config XIP_KERNEL
1830         bool "Kernel Execute-In-Place from ROM"
1831         depends on !ZBOOT_ROM
1832         help
1833           Execute-In-Place allows the kernel to run from non-volatile storage
1834           directly addressable by the CPU, such as NOR flash. This saves RAM
1835           space since the text section of the kernel is not loaded from flash
1836           to RAM.  Read-write sections, such as the data section and stack,
1837           are still copied to RAM.  The XIP kernel is not compressed since
1838           it has to run directly from flash, so it will take more space to
1839           store it.  The flash address used to link the kernel object files,
1840           and for storing it, is configuration dependent. Therefore, if you
1841           say Y here, you must know the proper physical address where to
1842           store the kernel image depending on your own flash memory usage.
1843
1844           Also note that the make target becomes "make xipImage" rather than
1845           "make zImage" or "make Image".  The final kernel binary to put in
1846           ROM memory will be arch/arm/boot/xipImage.
1847
1848           If unsure, say N.
1849
1850 config XIP_PHYS_ADDR
1851         hex "XIP Kernel Physical Location"
1852         depends on XIP_KERNEL
1853         default "0x00080000"
1854         help
1855           This is the physical address in your flash memory the kernel will
1856           be linked for and stored to.  This address is dependent on your
1857           own flash usage.
1858
1859 config KEXEC
1860         bool "Kexec system call (EXPERIMENTAL)"
1861         depends on EXPERIMENTAL
1862         help
1863           kexec is a system call that implements the ability to shutdown your
1864           current kernel, and to start another kernel.  It is like a reboot
1865           but it is independent of the system firmware.   And like a reboot
1866           you can start any kernel with it, not just Linux.
1867
1868           It is an ongoing process to be certain the hardware in a machine
1869           is properly shutdown, so do not be surprised if this code does not
1870           initially work for you.  It may help to enable device hotplugging
1871           support.
1872
1873 config ATAGS_PROC
1874         bool "Export atags in procfs"
1875         depends on KEXEC
1876         default y
1877         help
1878           Should the atags used to boot the kernel be exported in an "atags"
1879           file in procfs. Useful with kexec.
1880
1881 config CRASH_DUMP
1882         bool "Build kdump crash kernel (EXPERIMENTAL)"
1883         depends on EXPERIMENTAL
1884         help
1885           Generate crash dump after being started by kexec. This should
1886           be normally only set in special crash dump kernels which are
1887           loaded in the main kernel with kexec-tools into a specially
1888           reserved region and then later executed after a crash by
1889           kdump/kexec. The crash dump kernel must be compiled to a
1890           memory address not used by the main kernel
1891
1892           For more details see Documentation/kdump/kdump.txt
1893
1894 config AUTO_ZRELADDR
1895         bool "Auto calculation of the decompressed kernel image address"
1896         depends on !ZBOOT_ROM && !ARCH_U300
1897         help
1898           ZRELADDR is the physical address where the decompressed kernel
1899           image will be placed. If AUTO_ZRELADDR is selected, the address
1900           will be determined at run-time by masking the current IP with
1901           0xf8000000. This assumes the zImage being placed in the first 128MB
1902           from start of memory.
1903
1904 endmenu
1905
1906 menu "CPU Power Management"
1907
1908 if ARCH_HAS_CPUFREQ
1909
1910 source "drivers/cpufreq/Kconfig"
1911
1912 config CPU_FREQ_IMX
1913         tristate "CPUfreq driver for i.MX CPUs"
1914         depends on ARCH_MXC && CPU_FREQ
1915         help
1916           This enables the CPUfreq driver for i.MX CPUs.
1917
1918 config CPU_FREQ_SA1100
1919         bool
1920
1921 config CPU_FREQ_SA1110
1922         bool
1923
1924 config CPU_FREQ_INTEGRATOR
1925         tristate "CPUfreq driver for ARM Integrator CPUs"
1926         depends on ARCH_INTEGRATOR && CPU_FREQ
1927         default y
1928         help
1929           This enables the CPUfreq driver for ARM Integrator CPUs.
1930
1931           For details, take a look at <file:Documentation/cpu-freq>.
1932
1933           If in doubt, say Y.
1934
1935 config CPU_FREQ_PXA
1936         bool
1937         depends on CPU_FREQ && ARCH_PXA && PXA25x
1938         default y
1939         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1940
1941 config CPU_FREQ_S3C
1942         bool
1943         help
1944           Internal configuration node for common cpufreq on Samsung SoC
1945
1946 config CPU_FREQ_S3C24XX
1947         bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
1948         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1949         select CPU_FREQ_S3C
1950         help
1951           This enables the CPUfreq driver for the Samsung S3C24XX family
1952           of CPUs.
1953
1954           For details, take a look at <file:Documentation/cpu-freq>.
1955
1956           If in doubt, say N.
1957
1958 config CPU_FREQ_S3C24XX_PLL
1959         bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
1960         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1961         help
1962           Compile in support for changing the PLL frequency from the
1963           S3C24XX series CPUfreq driver. The PLL takes time to settle
1964           after a frequency change, so by default it is not enabled.
1965
1966           This also means that the PLL tables for the selected CPU(s) will
1967           be built which may increase the size of the kernel image.
1968
1969 config CPU_FREQ_S3C24XX_DEBUG
1970         bool "Debug CPUfreq Samsung driver core"
1971         depends on CPU_FREQ_S3C24XX
1972         help
1973           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1974
1975 config CPU_FREQ_S3C24XX_IODEBUG
1976         bool "Debug CPUfreq Samsung driver IO timing"
1977         depends on CPU_FREQ_S3C24XX
1978         help
1979           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1980
1981 config CPU_FREQ_S3C24XX_DEBUGFS
1982         bool "Export debugfs for CPUFreq"
1983         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1984         help
1985           Export status information via debugfs.
1986
1987 endif
1988
1989 source "drivers/cpuidle/Kconfig"
1990
1991 endmenu
1992
1993 menu "Floating point emulation"
1994
1995 comment "At least one emulation must be selected"
1996
1997 config FPE_NWFPE
1998         bool "NWFPE math emulation"
1999         depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
2000         ---help---
2001           Say Y to include the NWFPE floating point emulator in the kernel.
2002           This is necessary to run most binaries. Linux does not currently
2003           support floating point hardware so you need to say Y here even if
2004           your machine has an FPA or floating point co-processor podule.
2005
2006           You may say N here if you are going to load the Acorn FPEmulator
2007           early in the bootup.
2008
2009 config FPE_NWFPE_XP
2010         bool "Support extended precision"
2011         depends on FPE_NWFPE
2012         help
2013           Say Y to include 80-bit support in the kernel floating-point
2014           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
2015           Note that gcc does not generate 80-bit operations by default,
2016           so in most cases this option only enlarges the size of the
2017           floating point emulator without any good reason.
2018
2019           You almost surely want to say N here.
2020
2021 config FPE_FASTFPE
2022         bool "FastFPE math emulation (EXPERIMENTAL)"
2023         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
2024         ---help---
2025           Say Y here to include the FAST floating point emulator in the kernel.
2026           This is an experimental much faster emulator which now also has full
2027           precision for the mantissa.  It does not support any exceptions.
2028           It is very simple, and approximately 3-6 times faster than NWFPE.
2029
2030           It should be sufficient for most programs.  It may be not suitable
2031           for scientific calculations, but you have to check this for yourself.
2032           If you do not feel you need a faster FP emulation you should better
2033           choose NWFPE.
2034
2035 config VFP
2036         bool "VFP-format floating point maths"
2037         depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
2038         help
2039           Say Y to include VFP support code in the kernel. This is needed
2040           if your hardware includes a VFP unit.
2041
2042           Please see <file:Documentation/arm/VFP/release-notes.txt> for
2043           release notes and additional status information.
2044
2045           Say N if your target does not have VFP hardware.
2046
2047 config VFPv3
2048         bool
2049         depends on VFP
2050         default y if CPU_V7
2051
2052 config NEON
2053         bool "Advanced SIMD (NEON) Extension support"
2054         depends on VFPv3 && CPU_V7
2055         help
2056           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2057           Extension.
2058
2059 endmenu
2060
2061 menu "Userspace binary formats"
2062
2063 source "fs/Kconfig.binfmt"
2064
2065 config ARTHUR
2066         tristate "RISC OS personality"
2067         depends on !AEABI
2068         help
2069           Say Y here to include the kernel code necessary if you want to run
2070           Acorn RISC OS/Arthur binaries under Linux. This code is still very
2071           experimental; if this sounds frightening, say N and sleep in peace.
2072           You can also say M here to compile this support as a module (which
2073           will be called arthur).
2074
2075 endmenu
2076
2077 menu "Power management options"
2078
2079 source "kernel/power/Kconfig"
2080
2081 config ARCH_SUSPEND_POSSIBLE
2082         depends on !ARCH_S5P64X0 && !ARCH_S5PC100
2083         depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
2084                 CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
2085         def_bool y
2086
2087 endmenu
2088
2089 source "net/Kconfig"
2090
2091 source "drivers/Kconfig"
2092
2093 source "fs/Kconfig"
2094
2095 source "arch/arm/Kconfig.debug"
2096
2097 source "security/Kconfig"
2098
2099 source "crypto/Kconfig"
2100
2101 source "lib/Kconfig"