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         select NO_MACH_MEMORY_H
 289         help
 290           This enables support for ARM Ltd Versatile board.
 291
 292 config ARCH_VEXPRESS
 293         bool "ARM Ltd. Versatile Express family"
 294         select ARCH_WANT_OPTIONAL_GPIOLIB
 295         select ARM_AMBA
 296         select ARM_TIMER_SP804
 297         select CLKDEV_LOOKUP
 298         select HAVE_MACH_CLKDEV
 299         select GENERIC_CLOCKEVENTS
 300         select HAVE_CLK
 301         select HAVE_PATA_PLATFORM
 302         select ICST
 303         select PLAT_VERSATILE
 304         select PLAT_VERSATILE_CLCD
 305         select NO_MACH_MEMORY_H
 306         help
 307           This enables support for the ARM Ltd Versatile Express boards.
 308
 309 config ARCH_AT91
 310         bool "Atmel AT91"
 311         select ARCH_REQUIRE_GPIOLIB
 312         select HAVE_CLK
 313         select CLKDEV_LOOKUP
 314         help
 315           This enables support for systems based on the Atmel AT91RM9200,
 316           AT91SAM9 and AT91CAP9 processors.
 317
 318 config ARCH_BCMRING
 319         bool "Broadcom BCMRING"
 320         depends on MMU
 321         select CPU_V6
 322         select ARM_AMBA
 323         select ARM_TIMER_SP804
 324         select CLKDEV_LOOKUP
 325         select GENERIC_CLOCKEVENTS
 326         select ARCH_WANT_OPTIONAL_GPIOLIB
 327         select NO_MACH_MEMORY_H
 328         help
 329           Support for Broadcom's BCMRing platform.
 330
 331 config ARCH_CLPS711X
 332         bool "Cirrus Logic CLPS711x/EP721x-based"
 333         select CPU_ARM720T
 334         select ARCH_USES_GETTIMEOFFSET
 335         help
 336           Support for Cirrus Logic 711x/721x based boards.
 337
 338 config ARCH_CNS3XXX
 339         bool "Cavium Networks CNS3XXX family"
 340         select CPU_V6K
 341         select GENERIC_CLOCKEVENTS
 342         select ARM_GIC
 343         select MIGHT_HAVE_PCI
 344         select PCI_DOMAINS if PCI
 345         select NO_MACH_MEMORY_H
 346         help
 347           Support for Cavium Networks CNS3XXX platform.
 348
 349 config ARCH_GEMINI
 350         bool "Cortina Systems Gemini"
 351         select CPU_FA526
 352         select ARCH_REQUIRE_GPIOLIB
 353         select ARCH_USES_GETTIMEOFFSET
 354         select NO_MACH_MEMORY_H
 355         help
 356           Support for the Cortina Systems Gemini family SoCs
 357
 358 config ARCH_PRIMA2
 359         bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
 360         select CPU_V7
 361         select GENERIC_TIME
 362         select NO_IOPORT
 363         select GENERIC_CLOCKEVENTS
 364         select CLKDEV_LOOKUP
 365         select GENERIC_IRQ_CHIP
 366         select USE_OF
 367         select ZONE_DMA
 368         help
 369           Support for CSR SiRFSoC ARM Cortex A9 Platform
 370
 371 config ARCH_EBSA110
 372         bool "EBSA-110"
 373         select CPU_SA110
 374         select ISA
 375         select NO_IOPORT
 376         select ARCH_USES_GETTIMEOFFSET
 377         help
 378           This is an evaluation board for the StrongARM processor available
 379           from Digital. It has limited hardware on-board, including an
 380           Ethernet interface, two PCMCIA sockets, two serial ports and a
 381           parallel port.
 382
 383 config ARCH_EP93XX
 384         bool "EP93xx-based"
 385         select CPU_ARM920T
 386         select ARM_AMBA
 387         select ARM_VIC
 388         select CLKDEV_LOOKUP
 389         select ARCH_REQUIRE_GPIOLIB
 390         select ARCH_HAS_HOLES_MEMORYMODEL
 391         select ARCH_USES_GETTIMEOFFSET
 392         help
 393           This enables support for the Cirrus EP93xx series of CPUs.
 394
 395 config ARCH_FOOTBRIDGE
 396         bool "FootBridge"
 397         select CPU_SA110
 398         select FOOTBRIDGE
 399         select GENERIC_CLOCKEVENTS
 400         help
 401           Support for systems based on the DC21285 companion chip
 402           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 403
 404 config ARCH_MXC
 405         bool "Freescale MXC/iMX-based"
 406         select GENERIC_CLOCKEVENTS
 407         select ARCH_REQUIRE_GPIOLIB
 408         select CLKDEV_LOOKUP
 409         select CLKSRC_MMIO
 410         select GENERIC_IRQ_CHIP
 411         select HAVE_SCHED_CLOCK
 412         help
 413           Support for Freescale MXC/iMX-based family of processors
 414
 415 config ARCH_MXS
 416         bool "Freescale MXS-based"
 417         select GENERIC_CLOCKEVENTS
 418         select ARCH_REQUIRE_GPIOLIB
 419         select CLKDEV_LOOKUP
 420         select CLKSRC_MMIO
 421         select NO_MACH_MEMORY_H
 422         help
 423           Support for Freescale MXS-based family of processors
 424
 425 config ARCH_NETX
 426         bool "Hilscher NetX based"
 427         select CLKSRC_MMIO
 428         select CPU_ARM926T
 429         select ARM_VIC
 430         select GENERIC_CLOCKEVENTS
 431         select NO_MACH_MEMORY_H
 432         help
 433           This enables support for systems based on the Hilscher NetX Soc
 434
 435 config ARCH_H720X
 436         bool "Hynix HMS720x-based"
 437         select CPU_ARM720T
 438         select ISA_DMA_API
 439         select ARCH_USES_GETTIMEOFFSET
 440         select NO_MACH_MEMORY_H
 441         help
 442           This enables support for systems based on the Hynix HMS720x
 443
 444 config ARCH_IOP13XX
 445         bool "IOP13xx-based"
 446         depends on MMU
 447         select CPU_XSC3
 448         select PLAT_IOP
 449         select PCI
 450         select ARCH_SUPPORTS_MSI
 451         select VMSPLIT_1G
 452         help
 453           Support for Intel's IOP13XX (XScale) family of processors.
 454
 455 config ARCH_IOP32X
 456         bool "IOP32x-based"
 457         depends on MMU
 458         select CPU_XSCALE
 459         select PLAT_IOP
 460         select PCI
 461         select ARCH_REQUIRE_GPIOLIB
 462         select NO_MACH_MEMORY_H
 463         help
 464           Support for Intel's 80219 and IOP32X (XScale) family of
 465           processors.
 466
 467 config ARCH_IOP33X
 468         bool "IOP33x-based"
 469         depends on MMU
 470         select CPU_XSCALE
 471         select PLAT_IOP
 472         select PCI
 473         select ARCH_REQUIRE_GPIOLIB
 474         select NO_MACH_MEMORY_H
 475         help
 476           Support for Intel's IOP33X (XScale) family of processors.
 477
 478 config ARCH_IXP23XX
 479         bool "IXP23XX-based"
 480         depends on MMU
 481         select CPU_XSC3
 482         select PCI
 483         select ARCH_USES_GETTIMEOFFSET
 484         help
 485           Support for Intel's IXP23xx (XScale) family of processors.
 486
 487 config ARCH_IXP2000
 488         bool "IXP2400/2800-based"
 489         depends on MMU
 490         select CPU_XSCALE
 491         select PCI
 492         select ARCH_USES_GETTIMEOFFSET
 493         help
 494           Support for Intel's IXP2400/2800 (XScale) family of processors.
 495
 496 config ARCH_IXP4XX
 497         bool "IXP4xx-based"
 498         depends on MMU
 499         select CLKSRC_MMIO
 500         select CPU_XSCALE
 501         select GENERIC_GPIO
 502         select GENERIC_CLOCKEVENTS
 503         select HAVE_SCHED_CLOCK
 504         select MIGHT_HAVE_PCI
 505         select DMABOUNCE if PCI
 506         select NO_MACH_MEMORY_H
 507         help
 508           Support for Intel's IXP4XX (XScale) family of processors.
 509
 510 config ARCH_DOVE
 511         bool "Marvell Dove"
 512         select CPU_V7
 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 Marvell Dove SoC 88AP510
 520
 521 config ARCH_KIRKWOOD
 522         bool "Marvell Kirkwood"
 523         select CPU_FEROCEON
 524         select PCI
 525         select ARCH_REQUIRE_GPIOLIB
 526         select GENERIC_CLOCKEVENTS
 527         select PLAT_ORION
 528         select NO_MACH_MEMORY_H
 529         help
 530           Support for the following Marvell Kirkwood series SoCs:
 531           88F6180, 88F6192 and 88F6281.
 532
 533 config ARCH_LPC32XX
 534         bool "NXP LPC32XX"
 535         select CLKSRC_MMIO
 536         select CPU_ARM926T
 537         select ARCH_REQUIRE_GPIOLIB
 538         select HAVE_IDE
 539         select ARM_AMBA
 540         select USB_ARCH_HAS_OHCI
 541         select CLKDEV_LOOKUP
 542         select GENERIC_TIME
 543         select GENERIC_CLOCKEVENTS
 544         select NO_MACH_MEMORY_H
 545         help
 546           Support for the NXP LPC32XX family of processors
 547
 548 config ARCH_MV78XX0
 549         bool "Marvell MV78xx0"
 550         select CPU_FEROCEON
 551         select PCI
 552         select ARCH_REQUIRE_GPIOLIB
 553         select GENERIC_CLOCKEVENTS
 554         select PLAT_ORION
 555         select NO_MACH_MEMORY_H
 556         help
 557           Support for the following Marvell MV78xx0 series SoCs:
 558           MV781x0, MV782x0.
 559
 560 config ARCH_ORION5X
 561         bool "Marvell Orion"
 562         depends on MMU
 563         select CPU_FEROCEON
 564         select PCI
 565         select ARCH_REQUIRE_GPIOLIB
 566         select GENERIC_CLOCKEVENTS
 567         select PLAT_ORION
 568         select NO_MACH_MEMORY_H
 569         help
 570           Support for the following Marvell Orion 5x series SoCs:
 571           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 572           Orion-2 (5281), Orion-1-90 (6183).
 573
 574 config ARCH_MMP
 575         bool "Marvell PXA168/910/MMP2"
 576         depends on MMU
 577         select ARCH_REQUIRE_GPIOLIB
 578         select CLKDEV_LOOKUP
 579         select GENERIC_CLOCKEVENTS
 580         select HAVE_SCHED_CLOCK
 581         select TICK_ONESHOT
 582         select PLAT_PXA
 583         select SPARSE_IRQ
 584         select NO_MACH_MEMORY_H
 585         help
 586           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 587
 588 config ARCH_KS8695
 589         bool "Micrel/Kendin KS8695"
 590         select CPU_ARM922T
 591         select ARCH_REQUIRE_GPIOLIB
 592         select ARCH_USES_GETTIMEOFFSET
 593         help
 594           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 595           System-on-Chip devices.
 596
 597 config ARCH_W90X900
 598         bool "Nuvoton W90X900 CPU"
 599         select CPU_ARM926T
 600         select ARCH_REQUIRE_GPIOLIB
 601         select CLKDEV_LOOKUP
 602         select CLKSRC_MMIO
 603         select GENERIC_CLOCKEVENTS
 604         select NO_MACH_MEMORY_H
 605         help
 606           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 607           At present, the w90x900 has been renamed nuc900, regarding
 608           the ARM series product line, you can login the following
 609           link address to know more.
 610
 611           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 612                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 613
 614 config ARCH_NUC93X
 615         bool "Nuvoton NUC93X CPU"
 616         select CPU_ARM926T
 617         select CLKDEV_LOOKUP
 618         select NO_MACH_MEMORY_H
 619         help
 620           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 621           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 622
 623 config ARCH_TEGRA
 624         bool "NVIDIA Tegra"
 625         select CLKDEV_LOOKUP
 626         select CLKSRC_MMIO
 627         select GENERIC_TIME
 628         select GENERIC_CLOCKEVENTS
 629         select GENERIC_GPIO
 630         select HAVE_CLK
 631         select HAVE_SCHED_CLOCK
 632         select ARCH_HAS_CPUFREQ
 633         select NO_MACH_MEMORY_H
 634         help
 635           This enables support for NVIDIA Tegra based systems (Tegra APX,
 636           Tegra 6xx and Tegra 2 series).
 637
 638 config ARCH_PNX4008
 639         bool "Philips Nexperia PNX4008 Mobile"
 640         select CPU_ARM926T
 641         select CLKDEV_LOOKUP
 642         select ARCH_USES_GETTIMEOFFSET
 643         select NO_MACH_MEMORY_H
 644         help
 645           This enables support for Philips PNX4008 mobile platform.
 646
 647 config ARCH_PXA
 648         bool "PXA2xx/PXA3xx-based"
 649         depends on MMU
 650         select ARCH_MTD_XIP
 651         select ARCH_HAS_CPUFREQ
 652         select CLKDEV_LOOKUP
 653         select CLKSRC_MMIO
 654         select ARCH_REQUIRE_GPIOLIB
 655         select GENERIC_CLOCKEVENTS
 656         select HAVE_SCHED_CLOCK
 657         select TICK_ONESHOT
 658         select PLAT_PXA
 659         select SPARSE_IRQ
 660         select AUTO_ZRELADDR
 661         select MULTI_IRQ_HANDLER
 662         select NO_MACH_MEMORY_H
 663         help
 664           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 665
 666 config ARCH_MSM
 667         bool "Qualcomm MSM"
 668         select HAVE_CLK
 669         select GENERIC_CLOCKEVENTS
 670         select ARCH_REQUIRE_GPIOLIB
 671         select CLKDEV_LOOKUP
 672         select NO_MACH_MEMORY_H
 673         help
 674           Support for Qualcomm MSM/QSD based systems.  This runs on the
 675           apps processor of the MSM/QSD and depends on a shared memory
 676           interface to the modem processor which runs the baseband
 677           stack and controls some vital subsystems
 678           (clock and power control, etc).
 679
 680 config ARCH_SHMOBILE
 681         bool "Renesas SH-Mobile / R-Mobile"
 682         select HAVE_CLK
 683         select CLKDEV_LOOKUP
 684         select HAVE_MACH_CLKDEV
 685         select GENERIC_CLOCKEVENTS
 686         select NO_IOPORT
 687         select SPARSE_IRQ
 688         select MULTI_IRQ_HANDLER
 689         select PM_GENERIC_DOMAINS if PM
 690         help
 691           Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
 692
 693 config ARCH_RPC
 694         bool "RiscPC"
 695         select ARCH_ACORN
 696         select FIQ
 697         select TIMER_ACORN
 698         select ARCH_MAY_HAVE_PC_FDC
 699         select HAVE_PATA_PLATFORM
 700         select ISA_DMA_API
 701         select NO_IOPORT
 702         select ARCH_SPARSEMEM_ENABLE
 703         select ARCH_USES_GETTIMEOFFSET
 704         help
 705           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 706           CD-ROM interface, serial and parallel port, and the floppy drive.
 707
 708 config ARCH_SA1100
 709         bool "SA1100-based"
 710         select CLKSRC_MMIO
 711         select CPU_SA1100
 712         select ISA
 713         select ARCH_SPARSEMEM_ENABLE
 714         select ARCH_MTD_XIP
 715         select ARCH_HAS_CPUFREQ
 716         select CPU_FREQ
 717         select GENERIC_CLOCKEVENTS
 718         select HAVE_CLK
 719         select HAVE_SCHED_CLOCK
 720         select TICK_ONESHOT
 721         select ARCH_REQUIRE_GPIOLIB
 722         help
 723           Support for StrongARM 11x0 based boards.
 724
 725 config ARCH_S3C2410
 726         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
 727         select GENERIC_GPIO
 728         select ARCH_HAS_CPUFREQ
 729         select HAVE_CLK
 730         select CLKDEV_LOOKUP
 731         select ARCH_USES_GETTIMEOFFSET
 732         select HAVE_S3C2410_I2C if I2C
 733         select NO_MACH_MEMORY_H
 734         help
 735           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 736           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 737           the Samsung SMDK2410 development board (and derivatives).
 738
 739           Note, the S3C2416 and the S3C2450 are so close that they even share
 740           the same SoC ID code. This means that there is no separate machine
 741           directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
 742
 743 config ARCH_S3C64XX
 744         bool "Samsung S3C64XX"
 745         select PLAT_SAMSUNG
 746         select CPU_V6
 747         select ARM_VIC
 748         select HAVE_CLK
 749         select CLKDEV_LOOKUP
 750         select NO_IOPORT
 751         select ARCH_USES_GETTIMEOFFSET
 752         select ARCH_HAS_CPUFREQ
 753         select ARCH_REQUIRE_GPIOLIB
 754         select SAMSUNG_CLKSRC
 755         select SAMSUNG_IRQ_VIC_TIMER
 756         select SAMSUNG_IRQ_UART
 757         select S3C_GPIO_TRACK
 758         select S3C_GPIO_PULL_UPDOWN
 759         select S3C_GPIO_CFG_S3C24XX
 760         select S3C_GPIO_CFG_S3C64XX
 761         select S3C_DEV_NAND
 762         select USB_ARCH_HAS_OHCI
 763         select SAMSUNG_GPIOLIB_4BIT
 764         select HAVE_S3C2410_I2C if I2C
 765         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 766         help
 767           Samsung S3C64XX series based systems
 768
 769 config ARCH_S5P64X0
 770         bool "Samsung S5P6440 S5P6450"
 771         select CPU_V6
 772         select GENERIC_GPIO
 773         select HAVE_CLK
 774         select CLKDEV_LOOKUP
 775         select CLKSRC_MMIO
 776         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 777         select GENERIC_CLOCKEVENTS
 778         select HAVE_SCHED_CLOCK
 779         select HAVE_S3C2410_I2C if I2C
 780         select HAVE_S3C_RTC if RTC_CLASS
 781         help
 782           Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
 783           SMDK6450.
 784
 785 config ARCH_S5PC100
 786         bool "Samsung S5PC100"
 787         select GENERIC_GPIO
 788         select HAVE_CLK
 789         select CLKDEV_LOOKUP
 790         select CPU_V7
 791         select ARM_L1_CACHE_SHIFT_6
 792         select ARCH_USES_GETTIMEOFFSET
 793         select HAVE_S3C2410_I2C if I2C
 794         select HAVE_S3C_RTC if RTC_CLASS
 795         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 796         select NO_MACH_MEMORY_H
 797         help
 798           Samsung S5PC100 series based systems
 799
 800 config ARCH_S5PV210
 801         bool "Samsung S5PV210/S5PC110"
 802         select CPU_V7
 803         select ARCH_SPARSEMEM_ENABLE
 804         select ARCH_HAS_HOLES_MEMORYMODEL
 805         select GENERIC_GPIO
 806         select HAVE_CLK
 807         select CLKDEV_LOOKUP
 808         select CLKSRC_MMIO
 809         select ARM_L1_CACHE_SHIFT_6
 810         select ARCH_HAS_CPUFREQ
 811         select GENERIC_CLOCKEVENTS
 812         select HAVE_SCHED_CLOCK
 813         select HAVE_S3C2410_I2C if I2C
 814         select HAVE_S3C_RTC if RTC_CLASS
 815         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 816         help
 817           Samsung S5PV210/S5PC110 series based systems
 818
 819 config ARCH_EXYNOS4
 820         bool "Samsung EXYNOS4"
 821         select CPU_V7
 822         select ARCH_SPARSEMEM_ENABLE
 823         select ARCH_HAS_HOLES_MEMORYMODEL
 824         select GENERIC_GPIO
 825         select HAVE_CLK
 826         select CLKDEV_LOOKUP
 827         select ARCH_HAS_CPUFREQ
 828         select GENERIC_CLOCKEVENTS
 829         select HAVE_S3C_RTC if RTC_CLASS
 830         select HAVE_S3C2410_I2C if I2C
 831         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 832         help
 833           Samsung EXYNOS4 series based systems
 834
 835 config ARCH_SHARK
 836         bool "Shark"
 837         select CPU_SA110
 838         select ISA
 839         select ISA_DMA
 840         select ZONE_DMA
 841         select PCI
 842         select ARCH_USES_GETTIMEOFFSET
 843         help
 844           Support for the StrongARM based Digital DNARD machine, also known
 845           as "Shark" (<http://www.shark-linux.de/shark.html>).
 846
 847 config ARCH_TCC_926
 848         bool "Telechips TCC ARM926-based systems"
 849         select CLKSRC_MMIO
 850         select CPU_ARM926T
 851         select HAVE_CLK
 852         select CLKDEV_LOOKUP
 853         select GENERIC_CLOCKEVENTS
 854         select NO_MACH_MEMORY_H
 855         help
 856           Support for Telechips TCC ARM926-based systems.
 857
 858 config ARCH_U300
 859         bool "ST-Ericsson U300 Series"
 860         depends on MMU
 861         select CLKSRC_MMIO
 862         select CPU_ARM926T
 863         select HAVE_SCHED_CLOCK
 864         select HAVE_TCM
 865         select ARM_AMBA
 866         select ARM_VIC
 867         select GENERIC_CLOCKEVENTS
 868         select CLKDEV_LOOKUP
 869         select HAVE_MACH_CLKDEV
 870         select GENERIC_GPIO
 871         help
 872           Support for ST-Ericsson U300 series mobile platforms.
 873
 874 config ARCH_U8500
 875         bool "ST-Ericsson U8500 Series"
 876         select CPU_V7
 877         select ARM_AMBA
 878         select GENERIC_CLOCKEVENTS
 879         select CLKDEV_LOOKUP
 880         select ARCH_REQUIRE_GPIOLIB
 881         select ARCH_HAS_CPUFREQ
 882         select NO_MACH_MEMORY_H
 883         help
 884           Support for ST-Ericsson's Ux500 architecture
 885
 886 config ARCH_NOMADIK
 887         bool "STMicroelectronics Nomadik"
 888         select ARM_AMBA
 889         select ARM_VIC
 890         select CPU_ARM926T
 891         select CLKDEV_LOOKUP
 892         select GENERIC_CLOCKEVENTS
 893         select ARCH_REQUIRE_GPIOLIB
 894         select NO_MACH_MEMORY_H
 895         help
 896           Support for the Nomadik platform by ST-Ericsson
 897
 898 config ARCH_DAVINCI
 899         bool "TI DaVinci"
 900         select GENERIC_CLOCKEVENTS
 901         select ARCH_REQUIRE_GPIOLIB
 902         select ZONE_DMA
 903         select HAVE_IDE
 904         select CLKDEV_LOOKUP
 905         select GENERIC_ALLOCATOR
 906         select GENERIC_IRQ_CHIP
 907         select ARCH_HAS_HOLES_MEMORYMODEL
 908         select NO_MACH_MEMORY_H
 909         help
 910           Support for TI's DaVinci platform.
 911
 912 config ARCH_OMAP
 913         bool "TI OMAP"
 914         select HAVE_CLK
 915         select ARCH_REQUIRE_GPIOLIB
 916         select ARCH_HAS_CPUFREQ
 917         select CLKSRC_MMIO
 918         select GENERIC_CLOCKEVENTS
 919         select HAVE_SCHED_CLOCK
 920         select ARCH_HAS_HOLES_MEMORYMODEL
 921         help
 922           Support for TI's OMAP platform (OMAP1/2/3/4).
 923
 924 config PLAT_SPEAR
 925         bool "ST SPEAr"
 926         select ARM_AMBA
 927         select ARCH_REQUIRE_GPIOLIB
 928         select CLKDEV_LOOKUP
 929         select CLKSRC_MMIO
 930         select GENERIC_CLOCKEVENTS
 931         select HAVE_CLK
 932         select NO_MACH_MEMORY_H
 933         help
 934           Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
 935
 936 config ARCH_VT8500
 937         bool "VIA/WonderMedia 85xx"
 938         select CPU_ARM926T
 939         select GENERIC_GPIO
 940         select ARCH_HAS_CPUFREQ
 941         select GENERIC_CLOCKEVENTS
 942         select ARCH_REQUIRE_GPIOLIB
 943         select HAVE_PWM
 944         select NO_MACH_MEMORY_H
 945         help
 946           Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
 947
 948 config ARCH_ZYNQ
 949         bool "Xilinx Zynq ARM Cortex A9 Platform"
 950         select CPU_V7
 951         select GENERIC_TIME
 952         select GENERIC_CLOCKEVENTS
 953         select CLKDEV_LOOKUP
 954         select ARM_GIC
 955         select ARM_AMBA
 956         select ICST
 957         select USE_OF
 958         select NO_MACH_MEMORY_H
 959         help
 960           Support for Xilinx Zynq ARM Cortex A9 Platform
 961 endchoice
 962
 963 #
 964 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 965 # Kconfigs may be included either alphabetically (according to the
 966 # plat- suffix) or along side the corresponding mach-* source.
 967 #
 968 source "arch/arm/mach-at91/Kconfig"
 969
 970 source "arch/arm/mach-bcmring/Kconfig"
 971
 972 source "arch/arm/mach-clps711x/Kconfig"
 973
 974 source "arch/arm/mach-cns3xxx/Kconfig"
 975
 976 source "arch/arm/mach-davinci/Kconfig"
 977
 978 source "arch/arm/mach-dove/Kconfig"
 979
 980 source "arch/arm/mach-ep93xx/Kconfig"
 981
 982 source "arch/arm/mach-footbridge/Kconfig"
 983
 984 source "arch/arm/mach-gemini/Kconfig"
 985
 986 source "arch/arm/mach-h720x/Kconfig"
 987
 988 source "arch/arm/mach-integrator/Kconfig"
 989
 990 source "arch/arm/mach-iop32x/Kconfig"
 991
 992 source "arch/arm/mach-iop33x/Kconfig"
 993
 994 source "arch/arm/mach-iop13xx/Kconfig"
 995
 996 source "arch/arm/mach-ixp4xx/Kconfig"
 997
 998 source "arch/arm/mach-ixp2000/Kconfig"
 999
1000 source "arch/arm/mach-ixp23xx/Kconfig"
1001
1002 source "arch/arm/mach-kirkwood/Kconfig"
1003
1004 source "arch/arm/mach-ks8695/Kconfig"
1005
1006 source "arch/arm/mach-lpc32xx/Kconfig"
1007
1008 source "arch/arm/mach-msm/Kconfig"
1009
1010 source "arch/arm/mach-mv78xx0/Kconfig"
1011
1012 source "arch/arm/plat-mxc/Kconfig"
1013
1014 source "arch/arm/mach-mxs/Kconfig"
1015
1016 source "arch/arm/mach-netx/Kconfig"
1017
1018 source "arch/arm/mach-nomadik/Kconfig"
1019 source "arch/arm/plat-nomadik/Kconfig"
1020
1021 source "arch/arm/mach-nuc93x/Kconfig"
1022
1023 source "arch/arm/plat-omap/Kconfig"
1024
1025 source "arch/arm/mach-omap1/Kconfig"
1026
1027 source "arch/arm/mach-omap2/Kconfig"
1028
1029 source "arch/arm/mach-orion5x/Kconfig"
1030
1031 source "arch/arm/mach-pxa/Kconfig"
1032 source "arch/arm/plat-pxa/Kconfig"
1033
1034 source "arch/arm/mach-mmp/Kconfig"
1035
1036 source "arch/arm/mach-realview/Kconfig"
1037
1038 source "arch/arm/mach-sa1100/Kconfig"
1039
1040 source "arch/arm/plat-samsung/Kconfig"
1041 source "arch/arm/plat-s3c24xx/Kconfig"
1042 source "arch/arm/plat-s5p/Kconfig"
1043
1044 source "arch/arm/plat-spear/Kconfig"
1045
1046 source "arch/arm/plat-tcc/Kconfig"
1047
1048 if ARCH_S3C2410
1049 source "arch/arm/mach-s3c2410/Kconfig"
1050 source "arch/arm/mach-s3c2412/Kconfig"
1051 source "arch/arm/mach-s3c2416/Kconfig"
1052 source "arch/arm/mach-s3c2440/Kconfig"
1053 source "arch/arm/mach-s3c2443/Kconfig"
1054 endif
1055
1056 if ARCH_S3C64XX
1057 source "arch/arm/mach-s3c64xx/Kconfig"
1058 endif
1059
1060 source "arch/arm/mach-s5p64x0/Kconfig"
1061
1062 source "arch/arm/mach-s5pc100/Kconfig"
1063
1064 source "arch/arm/mach-s5pv210/Kconfig"
1065
1066 source "arch/arm/mach-exynos4/Kconfig"
1067
1068 source "arch/arm/mach-shmobile/Kconfig"
1069
1070 source "arch/arm/mach-tegra/Kconfig"
1071
1072 source "arch/arm/mach-u300/Kconfig"
1073
1074 source "arch/arm/mach-ux500/Kconfig"
1075
1076 source "arch/arm/mach-versatile/Kconfig"
1077
1078 source "arch/arm/mach-vexpress/Kconfig"
1079 source "arch/arm/plat-versatile/Kconfig"
1080
1081 source "arch/arm/mach-vt8500/Kconfig"
1082
1083 source "arch/arm/mach-w90x900/Kconfig"
1084
1085 # Definitions to make life easier
1086 config ARCH_ACORN
1087         bool
1088
1089 config PLAT_IOP
1090         bool
1091         select GENERIC_CLOCKEVENTS
1092         select HAVE_SCHED_CLOCK
1093
1094 config PLAT_ORION
1095         bool
1096         select CLKSRC_MMIO
1097         select GENERIC_IRQ_CHIP
1098         select HAVE_SCHED_CLOCK
1099
1100 config PLAT_PXA
1101         bool
1102
1103 config PLAT_VERSATILE
1104         bool
1105
1106 config ARM_TIMER_SP804
1107         bool
1108         select CLKSRC_MMIO
1109
1110 source arch/arm/mm/Kconfig
1111
1112 config IWMMXT
1113         bool "Enable iWMMXt support"
1114         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1115         default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
1116         help
1117           Enable support for iWMMXt context switching at run time if
1118           running on a CPU that supports it.
1119
1120 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
1121 config XSCALE_PMU
1122         bool
1123         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
1124         default y
1125
1126 config CPU_HAS_PMU
1127         depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
1128                    (!ARCH_OMAP3 || OMAP3_EMU)
1129         default y
1130         bool
1131
1132 config MULTI_IRQ_HANDLER
1133         bool
1134         help
1135           Allow each machine to specify it's own IRQ handler at run time.
1136
1137 if !MMU
1138 source "arch/arm/Kconfig-nommu"
1139 endif
1140
1141 config ARM_ERRATA_411920
1142         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1143         depends on CPU_V6 || CPU_V6K
1144         help
1145           Invalidation of the Instruction Cache operation can
1146           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1147           It does not affect the MPCore. This option enables the ARM Ltd.
1148           recommended workaround.
1149
1150 config ARM_ERRATA_430973
1151         bool "ARM errata: Stale prediction on replaced interworking branch"
1152         depends on CPU_V7
1153         help
1154           This option enables the workaround for the 430973 Cortex-A8
1155           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1156           interworking branch is replaced with another code sequence at the
1157           same virtual address, whether due to self-modifying code or virtual
1158           to physical address re-mapping, Cortex-A8 does not recover from the
1159           stale interworking branch prediction. This results in Cortex-A8
1160           executing the new code sequence in the incorrect ARM or Thumb state.
1161           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1162           and also flushes the branch target cache at every context switch.
1163           Note that setting specific bits in the ACTLR register may not be
1164           available in non-secure mode.
1165
1166 config ARM_ERRATA_458693
1167         bool "ARM errata: Processor deadlock when a false hazard is created"
1168         depends on CPU_V7
1169         help
1170           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1171           erratum. For very specific sequences of memory operations, it is
1172           possible for a hazard condition intended for a cache line to instead
1173           be incorrectly associated with a different cache line. This false
1174           hazard might then cause a processor deadlock. The workaround enables
1175           the L1 caching of the NEON accesses and disables the PLD instruction
1176           in the ACTLR register. Note that setting specific bits in the ACTLR
1177           register may not be available in non-secure mode.
1178
1179 config ARM_ERRATA_460075
1180         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1181         depends on CPU_V7
1182         help
1183           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1184           erratum. Any asynchronous access to the L2 cache may encounter a
1185           situation in which recent store transactions to the L2 cache are lost
1186           and overwritten with stale memory contents from external memory. The
1187           workaround disables the write-allocate mode for the L2 cache via the
1188           ACTLR register. Note that setting specific bits in the ACTLR register
1189           may not be available in non-secure mode.
1190
1191 config ARM_ERRATA_742230
1192         bool "ARM errata: DMB operation may be faulty"
1193         depends on CPU_V7 && SMP
1194         help
1195           This option enables the workaround for the 742230 Cortex-A9
1196           (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1197           between two write operations may not ensure the correct visibility
1198           ordering of the two writes. This workaround sets a specific bit in
1199           the diagnostic register of the Cortex-A9 which causes the DMB
1200           instruction to behave as a DSB, ensuring the correct behaviour of
1201           the two writes.
1202
1203 config ARM_ERRATA_742231
1204         bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1205         depends on CPU_V7 && SMP
1206         help
1207           This option enables the workaround for the 742231 Cortex-A9
1208           (r2p0..r2p2) erratum. Under certain conditions, specific to the
1209           Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1210           accessing some data located in the same cache line, may get corrupted
1211           data due to bad handling of the address hazard when the line gets
1212           replaced from one of the CPUs at the same time as another CPU is
1213           accessing it. This workaround sets specific bits in the diagnostic
1214           register of the Cortex-A9 which reduces the linefill issuing
1215           capabilities of the processor.
1216
1217 config PL310_ERRATA_588369
1218         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1219         depends on CACHE_L2X0
1220         help
1221            The PL310 L2 cache controller implements three types of Clean &
1222            Invalidate maintenance operations: by Physical Address
1223            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1224            They are architecturally defined to behave as the execution of a
1225            clean operation followed immediately by an invalidate operation,
1226            both performing to the same memory location. This functionality
1227            is not correctly implemented in PL310 as clean lines are not
1228            invalidated as a result of these operations.
1229
1230 config ARM_ERRATA_720789
1231         bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1232         depends on CPU_V7 && SMP
1233         help
1234           This option enables the workaround for the 720789 Cortex-A9 (prior to
1235           r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1236           broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1237           As a consequence of this erratum, some TLB entries which should be
1238           invalidated are not, resulting in an incoherency in the system page
1239           tables. The workaround changes the TLB flushing routines to invalidate
1240           entries regardless of the ASID.
1241
1242 config PL310_ERRATA_727915
1243         bool "Background Clean & Invalidate by Way operation can cause data corruption"
1244         depends on CACHE_L2X0
1245         help
1246           PL310 implements the Clean & Invalidate by Way L2 cache maintenance
1247           operation (offset 0x7FC). This operation runs in background so that
1248           PL310 can handle normal accesses while it is in progress. Under very
1249           rare circumstances, due to this erratum, write data can be lost when
1250           PL310 treats a cacheable write transaction during a Clean &
1251           Invalidate by Way operation.
1252
1253 config ARM_ERRATA_743622
1254         bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1255         depends on CPU_V7
1256         help
1257           This option enables the workaround for the 743622 Cortex-A9
1258           (r2p0..r2p2) erratum. Under very rare conditions, a faulty
1259           optimisation in the Cortex-A9 Store Buffer may lead to data
1260           corruption. This workaround sets a specific bit in the diagnostic
1261           register of the Cortex-A9 which disables the Store Buffer
1262           optimisation, preventing the defect from occurring. This has no
1263           visible impact on the overall performance or power consumption of the
1264           processor.
1265
1266 config ARM_ERRATA_751472
1267         bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1268         depends on CPU_V7 && SMP
1269         help
1270           This option enables the workaround for the 751472 Cortex-A9 (prior
1271           to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1272           completion of a following broadcasted operation if the second
1273           operation is received by a CPU before the ICIALLUIS has completed,
1274           potentially leading to corrupted entries in the cache or TLB.
1275
1276 config ARM_ERRATA_753970
1277         bool "ARM errata: cache sync operation may be faulty"
1278         depends on CACHE_PL310
1279         help
1280           This option enables the workaround for the 753970 PL310 (r3p0) erratum.
1281
1282           Under some condition the effect of cache sync operation on
1283           the store buffer still remains when the operation completes.
1284           This means that the store buffer is always asked to drain and
1285           this prevents it from merging any further writes. The workaround
1286           is to replace the normal offset of cache sync operation (0x730)
1287           by another offset targeting an unmapped PL310 register 0x740.
1288           This has the same effect as the cache sync operation: store buffer
1289           drain and waiting for all buffers empty.
1290
1291 config ARM_ERRATA_754322
1292         bool "ARM errata: possible faulty MMU translations following an ASID switch"
1293         depends on CPU_V7
1294         help
1295           This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1296           r3p*) erratum. A speculative memory access may cause a page table walk
1297           which starts prior to an ASID switch but completes afterwards. This
1298           can populate the micro-TLB with a stale entry which may be hit with
1299           the new ASID. This workaround places two dsb instructions in the mm
1300           switching code so that no page table walks can cross the ASID switch.
1301
1302 config ARM_ERRATA_754327
1303         bool "ARM errata: no automatic Store Buffer drain"
1304         depends on CPU_V7 && SMP
1305         help
1306           This option enables the workaround for the 754327 Cortex-A9 (prior to
1307           r2p0) erratum. The Store Buffer does not have any automatic draining
1308           mechanism and therefore a livelock may occur if an external agent
1309           continuously polls a memory location waiting to observe an update.
1310           This workaround defines cpu_relax() as smp_mb(), preventing correctly
1311           written polling loops from denying visibility of updates to memory.
1312
1313 endmenu
1314
1315 source "arch/arm/common/Kconfig"
1316
1317 menu "Bus support"
1318
1319 config ARM_AMBA
1320         bool
1321
1322 config ISA
1323         bool
1324         help
1325           Find out whether you have ISA slots on your motherboard.  ISA is the
1326           name of a bus system, i.e. the way the CPU talks to the other stuff
1327           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1328           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1329           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1330
1331 # Select ISA DMA controller support
1332 config ISA_DMA
1333         bool
1334         select ISA_DMA_API
1335
1336 # Select ISA DMA interface
1337 config ISA_DMA_API
1338         bool
1339
1340 config PCI
1341         bool "PCI support" if MIGHT_HAVE_PCI
1342         help
1343           Find out whether you have a PCI motherboard. PCI is the name of a
1344           bus system, i.e. the way the CPU talks to the other stuff inside
1345           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1346           VESA. If you have PCI, say Y, otherwise N.
1347
1348 config PCI_DOMAINS
1349         bool
1350         depends on PCI
1351
1352 config PCI_NANOENGINE
1353         bool "BSE nanoEngine PCI support"
1354         depends on SA1100_NANOENGINE
1355         help
1356           Enable PCI on the BSE nanoEngine board.
1357
1358 config PCI_SYSCALL
1359         def_bool PCI
1360
1361 # Select the host bridge type
1362 config PCI_HOST_VIA82C505
1363         bool
1364         depends on PCI && ARCH_SHARK
1365         default y
1366
1367 config PCI_HOST_ITE8152
1368         bool
1369         depends on PCI && MACH_ARMCORE
1370         default y
1371         select DMABOUNCE
1372
1373 source "drivers/pci/Kconfig"
1374
1375 source "drivers/pcmcia/Kconfig"
1376
1377 endmenu
1378
1379 menu "Kernel Features"
1380
1381 source "kernel/time/Kconfig"
1382
1383 config SMP
1384         bool "Symmetric Multi-Processing"
1385         depends on CPU_V6K || CPU_V7
1386         depends on GENERIC_CLOCKEVENTS
1387         depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
1388                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
1389                  ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
1390                  ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
1391         select USE_GENERIC_SMP_HELPERS
1392         select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
1393         help
1394           This enables support for systems with more than one CPU. If you have
1395           a system with only one CPU, like most personal computers, say N. If
1396           you have a system with more than one CPU, say Y.
1397
1398           If you say N here, the kernel will run on single and multiprocessor
1399           machines, but will use only one CPU of a multiprocessor machine. If
1400           you say Y here, the kernel will run on many, but not all, single
1401           processor machines. On a single processor machine, the kernel will
1402           run faster if you say N here.
1403
1404           See also <file:Documentation/i386/IO-APIC.txt>,
1405           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1406           <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1407
1408           If you don't know what to do here, say N.
1409
1410 config SMP_ON_UP
1411         bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1412         depends on EXPERIMENTAL
1413         depends on SMP && !XIP_KERNEL
1414         default y
1415         help
1416           SMP kernels contain instructions which fail on non-SMP processors.
1417           Enabling this option allows the kernel to modify itself to make
1418           these instructions safe.  Disabling it allows about 1K of space
1419           savings.
1420
1421           If you don't know what to do here, say Y.
1422
1423 config HAVE_ARM_SCU
1424         bool
1425         help
1426           This option enables support for the ARM system coherency unit
1427
1428 config HAVE_ARM_TWD
1429         bool
1430         depends on SMP
1431         select TICK_ONESHOT
1432         help
1433           This options enables support for the ARM timer and watchdog unit
1434
1435 choice
1436         prompt "Memory split"
1437         default VMSPLIT_3G
1438         help
1439           Select the desired split between kernel and user memory.
1440
1441           If you are not absolutely sure what you are doing, leave this
1442           option alone!
1443
1444         config VMSPLIT_3G
1445                 bool "3G/1G user/kernel split"
1446         config VMSPLIT_2G
1447                 bool "2G/2G user/kernel split"
1448         config VMSPLIT_1G
1449                 bool "1G/3G user/kernel split"
1450 endchoice
1451
1452 config PAGE_OFFSET
1453         hex
1454         default 0x40000000 if VMSPLIT_1G
1455         default 0x80000000 if VMSPLIT_2G
1456         default 0xC0000000
1457
1458 config NR_CPUS
1459         int "Maximum number of CPUs (2-32)"
1460         range 2 32
1461         depends on SMP
1462         default "4"
1463
1464 config HOTPLUG_CPU
1465         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1466         depends on SMP && HOTPLUG && EXPERIMENTAL
1467         help
1468           Say Y here to experiment with turning CPUs off and on.  CPUs
1469           can be controlled through /sys/devices/system/cpu.
1470
1471 config LOCAL_TIMERS
1472         bool "Use local timer interrupts"
1473         depends on SMP
1474         default y
1475         select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
1476         help
1477           Enable support for local timers on SMP platforms, rather then the
1478           legacy IPI broadcast method.  Local timers allows the system
1479           accounting to be spread across the timer interval, preventing a
1480           "thundering herd" at every timer tick.
1481
1482 source kernel/Kconfig.preempt
1483
1484 config HZ
1485         int
1486         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
1487                 ARCH_S5PV210 || ARCH_EXYNOS4
1488         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1489         default AT91_TIMER_HZ if ARCH_AT91
1490         default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1491         default 100
1492
1493 config THUMB2_KERNEL
1494         bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
1495         depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
1496         select AEABI
1497         select ARM_ASM_UNIFIED
1498         help
1499           By enabling this option, the kernel will be compiled in
1500           Thumb-2 mode. A compiler/assembler that understand the unified
1501           ARM-Thumb syntax is needed.
1502
1503           If unsure, say N.
1504
1505 config THUMB2_AVOID_R_ARM_THM_JUMP11
1506         bool "Work around buggy Thumb-2 short branch relocations in gas"
1507         depends on THUMB2_KERNEL && MODULES
1508         default y
1509         help
1510           Various binutils versions can resolve Thumb-2 branches to
1511           locally-defined, preemptible global symbols as short-range "b.n"
1512           branch instructions.
1513
1514           This is a problem, because there's no guarantee the final
1515           destination of the symbol, or any candidate locations for a
1516           trampoline, are within range of the branch.  For this reason, the
1517           kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1518           relocation in modules at all, and it makes little sense to add
1519           support.
1520
1521           The symptom is that the kernel fails with an "unsupported
1522           relocation" error when loading some modules.
1523
1524           Until fixed tools are available, passing
1525           -fno-optimize-sibling-calls to gcc should prevent gcc generating
1526           code which hits this problem, at the cost of a bit of extra runtime
1527           stack usage in some cases.
1528
1529           The problem is described in more detail at:
1530               https://bugs.launchpad.net/binutils-linaro/+bug/725126
1531
1532           Only Thumb-2 kernels are affected.
1533
1534           Unless you are sure your tools don't have this problem, say Y.
1535
1536 config ARM_ASM_UNIFIED
1537         bool
1538
1539 config AEABI
1540         bool "Use the ARM EABI to compile the kernel"
1541         help
1542           This option allows for the kernel to be compiled using the latest
1543           ARM ABI (aka EABI).  This is only useful if you are using a user
1544           space environment that is also compiled with EABI.
1545
1546           Since there are major incompatibilities between the legacy ABI and
1547           EABI, especially with regard to structure member alignment, this
1548           option also changes the kernel syscall calling convention to
1549           disambiguate both ABIs and allow for backward compatibility support
1550           (selected with CONFIG_OABI_COMPAT).
1551
1552           To use this you need GCC version 4.0.0 or later.
1553
1554 config OABI_COMPAT
1555         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1556         depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
1557         default y
1558         help
1559           This option preserves the old syscall interface along with the
1560           new (ARM EABI) one. It also provides a compatibility layer to
1561           intercept syscalls that have structure arguments which layout
1562           in memory differs between the legacy ABI and the new ARM EABI
1563           (only for non "thumb" binaries). This option adds a tiny
1564           overhead to all syscalls and produces a slightly larger kernel.
1565           If you know you'll be using only pure EABI user space then you
1566           can say N here. If this option is not selected and you attempt
1567           to execute a legacy ABI binary then the result will be
1568           UNPREDICTABLE (in fact it can be predicted that it won't work
1569           at all). If in doubt say Y.
1570
1571 config ARCH_HAS_HOLES_MEMORYMODEL
1572         bool
1573
1574 config ARCH_SPARSEMEM_ENABLE
1575         bool
1576
1577 config ARCH_SPARSEMEM_DEFAULT
1578         def_bool ARCH_SPARSEMEM_ENABLE
1579
1580 config ARCH_SELECT_MEMORY_MODEL
1581         def_bool ARCH_SPARSEMEM_ENABLE
1582
1583 config HAVE_ARCH_PFN_VALID
1584         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1585
1586 config HIGHMEM
1587         bool "High Memory Support"
1588         depends on MMU
1589         help
1590           The address space of ARM processors is only 4 Gigabytes large
1591           and it has to accommodate user address space, kernel address
1592           space as well as some memory mapped IO. That means that, if you
1593           have a large amount of physical memory and/or IO, not all of the
1594           memory can be "permanently mapped" by the kernel. The physical
1595           memory that is not permanently mapped is called "high memory".
1596
1597           Depending on the selected kernel/user memory split, minimum
1598           vmalloc space and actual amount of RAM, you may not need this
1599           option which should result in a slightly faster kernel.
1600
1601           If unsure, say n.
1602
1603 config HIGHPTE
1604         bool "Allocate 2nd-level pagetables from highmem"
1605         depends on HIGHMEM
1606
1607 config HW_PERF_EVENTS
1608         bool "Enable hardware performance counter support for perf events"
1609         depends on PERF_EVENTS && CPU_HAS_PMU
1610         default y
1611         help
1612           Enable hardware performance counter support for perf events. If
1613           disabled, perf events will use software events only.
1614
1615 source "mm/Kconfig"
1616
1617 config FORCE_MAX_ZONEORDER
1618         int "Maximum zone order" if ARCH_SHMOBILE
1619         range 11 64 if ARCH_SHMOBILE
1620         default "9" if SA1111
1621         default "11"
1622         help
1623           The kernel memory allocator divides physically contiguous memory
1624           blocks into "zones", where each zone is a power of two number of
1625           pages.  This option selects the largest power of two that the kernel
1626           keeps in the memory allocator.  If you need to allocate very large
1627           blocks of physically contiguous memory, then you may need to
1628           increase this value.
1629
1630           This config option is actually maximum order plus one. For example,
1631           a value of 11 means that the largest free memory block is 2^10 pages.
1632
1633 config LEDS
1634         bool "Timer and CPU usage LEDs"
1635         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1636                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1637                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1638                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1639                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1640                    ARCH_AT91 || ARCH_DAVINCI || \
1641                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1642         help
1643           If you say Y here, the LEDs on your machine will be used
1644           to provide useful information about your current system status.
1645
1646           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1647           be able to select which LEDs are active using the options below. If
1648           you are compiling a kernel for the EBSA-110 or the LART however, the
1649           red LED will simply flash regularly to indicate that the system is
1650           still functional. It is safe to say Y here if you have a CATS
1651           system, but the driver will do nothing.
1652
1653 config LEDS_TIMER
1654         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1655                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1656                             || MACH_OMAP_PERSEUS2
1657         depends on LEDS
1658         depends on !GENERIC_CLOCKEVENTS
1659         default y if ARCH_EBSA110
1660         help
1661           If you say Y here, one of the system LEDs (the green one on the
1662           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1663           will flash regularly to indicate that the system is still
1664           operational. This is mainly useful to kernel hackers who are
1665           debugging unstable kernels.
1666
1667           The LART uses the same LED for both Timer LED and CPU usage LED
1668           functions. You may choose to use both, but the Timer LED function
1669           will overrule the CPU usage LED.
1670
1671 config LEDS_CPU
1672         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1673                         !ARCH_OMAP) \
1674                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1675                         || MACH_OMAP_PERSEUS2
1676         depends on LEDS
1677         help
1678           If you say Y here, the red LED will be used to give a good real
1679           time indication of CPU usage, by lighting whenever the idle task
1680           is not currently executing.
1681
1682           The LART uses the same LED for both Timer LED and CPU usage LED
1683           functions. You may choose to use both, but the Timer LED function
1684           will overrule the CPU usage LED.
1685
1686 config ALIGNMENT_TRAP
1687         bool
1688         depends on CPU_CP15_MMU
1689         default y if !ARCH_EBSA110
1690         select HAVE_PROC_CPU if PROC_FS
1691         help
1692           ARM processors cannot fetch/store information which is not
1693           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1694           address divisible by 4. On 32-bit ARM processors, these non-aligned
1695           fetch/store instructions will be emulated in software if you say
1696           here, which has a severe performance impact. This is necessary for
1697           correct operation of some network protocols. With an IP-only
1698           configuration it is safe to say N, otherwise say Y.
1699
1700 config UACCESS_WITH_MEMCPY
1701         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1702         depends on MMU && EXPERIMENTAL
1703         default y if CPU_FEROCEON
1704         help
1705           Implement faster copy_to_user and clear_user methods for CPU
1706           cores where a 8-word STM instruction give significantly higher
1707           memory write throughput than a sequence of individual 32bit stores.
1708
1709           A possible side effect is a slight increase in scheduling latency
1710           between threads sharing the same address space if they invoke
1711           such copy operations with large buffers.
1712
1713           However, if the CPU data cache is using a write-allocate mode,
1714           this option is unlikely to provide any performance gain.
1715
1716 config SECCOMP
1717         bool
1718         prompt "Enable seccomp to safely compute untrusted bytecode"
1719         ---help---
1720           This kernel feature is useful for number crunching applications
1721           that may need to compute untrusted bytecode during their
1722           execution. By using pipes or other transports made available to
1723           the process as file descriptors supporting the read/write
1724           syscalls, it's possible to isolate those applications in
1725           their own address space using seccomp. Once seccomp is
1726           enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1727           and the task is only allowed to execute a few safe syscalls
1728           defined by each seccomp mode.
1729
1730 config CC_STACKPROTECTOR
1731         bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1732         depends on EXPERIMENTAL
1733         help
1734           This option turns on the -fstack-protector GCC feature. This
1735           feature puts, at the beginning of functions, a canary value on
1736           the stack just before the return address, and validates
1737           the value just before actually returning.  Stack based buffer
1738           overflows (that need to overwrite this return address) now also
1739           overwrite the canary, which gets detected and the attack is then
1740           neutralized via a kernel panic.
1741           This feature requires gcc version 4.2 or above.
1742
1743 config DEPRECATED_PARAM_STRUCT
1744         bool "Provide old way to pass kernel parameters"
1745         help
1746           This was deprecated in 2001 and announced to live on for 5 years.
1747           Some old boot loaders still use this way.
1748
1749 endmenu
1750
1751 menu "Boot options"
1752
1753 config USE_OF
1754         bool "Flattened Device Tree support"
1755         select OF
1756         select OF_EARLY_FLATTREE
1757         select IRQ_DOMAIN
1758         help
1759           Include support for flattened device tree machine descriptions.
1760
1761 # Compressed boot loader in ROM.  Yes, we really want to ask about
1762 # TEXT and BSS so we preserve their values in the config files.
1763 config ZBOOT_ROM_TEXT
1764         hex "Compressed ROM boot loader base address"
1765         default "0"
1766         help
1767           The physical address at which the ROM-able zImage is to be
1768           placed in the target.  Platforms which normally make use of
1769           ROM-able zImage formats normally set this to a suitable
1770           value in their defconfig file.
1771
1772           If ZBOOT_ROM is not enabled, this has no effect.
1773
1774 config ZBOOT_ROM_BSS
1775         hex "Compressed ROM boot loader BSS address"
1776         default "0"
1777         help
1778           The base address of an area of read/write memory in the target
1779           for the ROM-able zImage which must be available while the
1780           decompressor is running. It must be large enough to hold the
1781           entire decompressed kernel plus an additional 128 KiB.
1782           Platforms which normally make use of ROM-able zImage formats
1783           normally set this to a suitable value in their defconfig file.
1784
1785           If ZBOOT_ROM is not enabled, this has no effect.
1786
1787 config ZBOOT_ROM
1788         bool "Compressed boot loader in ROM/flash"
1789         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1790         help
1791           Say Y here if you intend to execute your compressed kernel image
1792           (zImage) directly from ROM or flash.  If unsure, say N.
1793
1794 choice
1795         prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1796         depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
1797         default ZBOOT_ROM_NONE
1798         help
1799           Include experimental SD/MMC loading code in the ROM-able zImage.
1800           With this enabled it is possible to write the the ROM-able zImage
1801           kernel image to an MMC or SD card and boot the kernel straight
1802           from the reset vector. At reset the processor Mask ROM will load
1803           the first part of the the ROM-able zImage which in turn loads the
1804           rest the kernel image to RAM.
1805
1806 config ZBOOT_ROM_NONE
1807         bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1808         help
1809           Do not load image from SD or MMC
1810
1811 config ZBOOT_ROM_MMCIF
1812         bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
1813         help
1814           Load image from MMCIF hardware block.
1815
1816 config ZBOOT_ROM_SH_MOBILE_SDHI
1817         bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1818         help
1819           Load image from SDHI hardware block
1820
1821 endchoice
1822
1823 config CMDLINE
1824         string "Default kernel command string"
1825         default ""
1826         help
1827           On some architectures (EBSA110 and CATS), there is currently no way
1828           for the boot loader to pass arguments to the kernel. For these
1829           architectures, you should supply some command-line options at build
1830           time by entering them here. As a minimum, you should specify the
1831           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1832
1833 choice
1834         prompt "Kernel command line type" if CMDLINE != ""
1835         default CMDLINE_FROM_BOOTLOADER
1836
1837 config CMDLINE_FROM_BOOTLOADER
1838         bool "Use bootloader kernel arguments if available"
1839         help
1840           Uses the command-line options passed by the boot loader. If
1841           the boot loader doesn't provide any, the default kernel command
1842           string provided in CMDLINE will be used.
1843
1844 config CMDLINE_EXTEND
1845         bool "Extend bootloader kernel arguments"
1846         help
1847           The command-line arguments provided by the boot loader will be
1848           appended to the default kernel command string.
1849
1850 config CMDLINE_FORCE
1851         bool "Always use the default kernel command string"
1852         help
1853           Always use the default kernel command string, even if the boot
1854           loader passes other arguments to the kernel.
1855           This is useful if you cannot or don't want to change the
1856           command-line options your boot loader passes to the kernel.
1857 endchoice
1858
1859 config XIP_KERNEL
1860         bool "Kernel Execute-In-Place from ROM"
1861         depends on !ZBOOT_ROM
1862         help
1863           Execute-In-Place allows the kernel to run from non-volatile storage
1864           directly addressable by the CPU, such as NOR flash. This saves RAM
1865           space since the text section of the kernel is not loaded from flash
1866           to RAM.  Read-write sections, such as the data section and stack,
1867           are still copied to RAM.  The XIP kernel is not compressed since
1868           it has to run directly from flash, so it will take more space to
1869           store it.  The flash address used to link the kernel object files,
1870           and for storing it, is configuration dependent. Therefore, if you
1871           say Y here, you must know the proper physical address where to
1872           store the kernel image depending on your own flash memory usage.
1873
1874           Also note that the make target becomes "make xipImage" rather than
1875           "make zImage" or "make Image".  The final kernel binary to put in
1876           ROM memory will be arch/arm/boot/xipImage.
1877
1878           If unsure, say N.
1879
1880 config XIP_PHYS_ADDR
1881         hex "XIP Kernel Physical Location"
1882         depends on XIP_KERNEL
1883         default "0x00080000"
1884         help
1885           This is the physical address in your flash memory the kernel will
1886           be linked for and stored to.  This address is dependent on your
1887           own flash usage.
1888
1889 config KEXEC
1890         bool "Kexec system call (EXPERIMENTAL)"
1891         depends on EXPERIMENTAL
1892         help
1893           kexec is a system call that implements the ability to shutdown your
1894           current kernel, and to start another kernel.  It is like a reboot
1895           but it is independent of the system firmware.   And like a reboot
1896           you can start any kernel with it, not just Linux.
1897
1898           It is an ongoing process to be certain the hardware in a machine
1899           is properly shutdown, so do not be surprised if this code does not
1900           initially work for you.  It may help to enable device hotplugging
1901           support.
1902
1903 config ATAGS_PROC
1904         bool "Export atags in procfs"
1905         depends on KEXEC
1906         default y
1907         help
1908           Should the atags used to boot the kernel be exported in an "atags"
1909           file in procfs. Useful with kexec.
1910
1911 config CRASH_DUMP
1912         bool "Build kdump crash kernel (EXPERIMENTAL)"
1913         depends on EXPERIMENTAL
1914         help
1915           Generate crash dump after being started by kexec. This should
1916           be normally only set in special crash dump kernels which are
1917           loaded in the main kernel with kexec-tools into a specially
1918           reserved region and then later executed after a crash by
1919           kdump/kexec. The crash dump kernel must be compiled to a
1920           memory address not used by the main kernel
1921
1922           For more details see Documentation/kdump/kdump.txt
1923
1924 config AUTO_ZRELADDR
1925         bool "Auto calculation of the decompressed kernel image address"
1926         depends on !ZBOOT_ROM && !ARCH_U300
1927         help
1928           ZRELADDR is the physical address where the decompressed kernel
1929           image will be placed. If AUTO_ZRELADDR is selected, the address
1930           will be determined at run-time by masking the current IP with
1931           0xf8000000. This assumes the zImage being placed in the first 128MB
1932           from start of memory.
1933
1934 endmenu
1935
1936 menu "CPU Power Management"
1937
1938 if ARCH_HAS_CPUFREQ
1939
1940 source "drivers/cpufreq/Kconfig"
1941
1942 config CPU_FREQ_IMX
1943         tristate "CPUfreq driver for i.MX CPUs"
1944         depends on ARCH_MXC && CPU_FREQ
1945         help
1946           This enables the CPUfreq driver for i.MX CPUs.
1947
1948 config CPU_FREQ_SA1100
1949         bool
1950
1951 config CPU_FREQ_SA1110
1952         bool
1953
1954 config CPU_FREQ_INTEGRATOR
1955         tristate "CPUfreq driver for ARM Integrator CPUs"
1956         depends on ARCH_INTEGRATOR && CPU_FREQ
1957         default y
1958         help
1959           This enables the CPUfreq driver for ARM Integrator CPUs.
1960
1961           For details, take a look at <file:Documentation/cpu-freq>.
1962
1963           If in doubt, say Y.
1964
1965 config CPU_FREQ_PXA
1966         bool
1967         depends on CPU_FREQ && ARCH_PXA && PXA25x
1968         default y
1969         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1970
1971 config CPU_FREQ_S3C
1972         bool
1973         help
1974           Internal configuration node for common cpufreq on Samsung SoC
1975
1976 config CPU_FREQ_S3C24XX
1977         bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
1978         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1979         select CPU_FREQ_S3C
1980         help
1981           This enables the CPUfreq driver for the Samsung S3C24XX family
1982           of CPUs.
1983
1984           For details, take a look at <file:Documentation/cpu-freq>.
1985
1986           If in doubt, say N.
1987
1988 config CPU_FREQ_S3C24XX_PLL
1989         bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
1990         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1991         help
1992           Compile in support for changing the PLL frequency from the
1993           S3C24XX series CPUfreq driver. The PLL takes time to settle
1994           after a frequency change, so by default it is not enabled.
1995
1996           This also means that the PLL tables for the selected CPU(s) will
1997           be built which may increase the size of the kernel image.
1998
1999 config CPU_FREQ_S3C24XX_DEBUG
2000         bool "Debug CPUfreq Samsung driver core"
2001         depends on CPU_FREQ_S3C24XX
2002         help
2003           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
2004
2005 config CPU_FREQ_S3C24XX_IODEBUG
2006         bool "Debug CPUfreq Samsung driver IO timing"
2007         depends on CPU_FREQ_S3C24XX
2008         help
2009           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
2010
2011 config CPU_FREQ_S3C24XX_DEBUGFS
2012         bool "Export debugfs for CPUFreq"
2013         depends on CPU_FREQ_S3C24XX && DEBUG_FS
2014         help
2015           Export status information via debugfs.
2016
2017 endif
2018
2019 source "drivers/cpuidle/Kconfig"
2020
2021 endmenu
2022
2023 menu "Floating point emulation"
2024
2025 comment "At least one emulation must be selected"
2026
2027 config FPE_NWFPE
2028         bool "NWFPE math emulation"
2029         depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
2030         ---help---
2031           Say Y to include the NWFPE floating point emulator in the kernel.
2032           This is necessary to run most binaries. Linux does not currently
2033           support floating point hardware so you need to say Y here even if
2034           your machine has an FPA or floating point co-processor podule.
2035
2036           You may say N here if you are going to load the Acorn FPEmulator
2037           early in the bootup.
2038
2039 config FPE_NWFPE_XP
2040         bool "Support extended precision"
2041         depends on FPE_NWFPE
2042         help
2043           Say Y to include 80-bit support in the kernel floating-point
2044           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
2045           Note that gcc does not generate 80-bit operations by default,
2046           so in most cases this option only enlarges the size of the
2047           floating point emulator without any good reason.
2048
2049           You almost surely want to say N here.
2050
2051 config FPE_FASTFPE
2052         bool "FastFPE math emulation (EXPERIMENTAL)"
2053         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
2054         ---help---
2055           Say Y here to include the FAST floating point emulator in the kernel.
2056           This is an experimental much faster emulator which now also has full
2057           precision for the mantissa.  It does not support any exceptions.
2058           It is very simple, and approximately 3-6 times faster than NWFPE.
2059
2060           It should be sufficient for most programs.  It may be not suitable
2061           for scientific calculations, but you have to check this for yourself.
2062           If you do not feel you need a faster FP emulation you should better
2063           choose NWFPE.
2064
2065 config VFP
2066         bool "VFP-format floating point maths"
2067         depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
2068         help
2069           Say Y to include VFP support code in the kernel. This is needed
2070           if your hardware includes a VFP unit.
2071
2072           Please see <file:Documentation/arm/VFP/release-notes.txt> for
2073           release notes and additional status information.
2074
2075           Say N if your target does not have VFP hardware.
2076
2077 config VFPv3
2078         bool
2079         depends on VFP
2080         default y if CPU_V7
2081
2082 config NEON
2083         bool "Advanced SIMD (NEON) Extension support"
2084         depends on VFPv3 && CPU_V7
2085         help
2086           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2087           Extension.
2088
2089 endmenu
2090
2091 menu "Userspace binary formats"
2092
2093 source "fs/Kconfig.binfmt"
2094
2095 config ARTHUR
2096         tristate "RISC OS personality"
2097         depends on !AEABI
2098         help
2099           Say Y here to include the kernel code necessary if you want to run
2100           Acorn RISC OS/Arthur binaries under Linux. This code is still very
2101           experimental; if this sounds frightening, say N and sleep in peace.
2102           You can also say M here to compile this support as a module (which
2103           will be called arthur).
2104
2105 endmenu
2106
2107 menu "Power management options"
2108
2109 source "kernel/power/Kconfig"
2110
2111 config ARCH_SUSPEND_POSSIBLE
2112         depends on !ARCH_S5P64X0 && !ARCH_S5PC100
2113         depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
2114                 CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
2115         def_bool y
2116
2117 endmenu
2118
2119 source "net/Kconfig"
2120
2121 source "drivers/Kconfig"
2122
2123 source "fs/Kconfig"
2124
2125 source "arch/arm/Kconfig.debug"
2126
2127 source "security/Kconfig"
2128
2129 source "crypto/Kconfig"
2130
2131 source "lib/Kconfig"