arch/arm/Kconfig

   1 #
   2 # For a description of the syntax of this configuration file,
   3 # see Documentation/kbuild/kconfig-language.txt.
   4 #
   5
   6 mainmenu "Linux Kernel Configuration"
   7
   8 config ARM
   9         bool
  10         default y
  11         select HAVE_AOUT
  12         select HAVE_IDE
  13         select HAVE_MEMBLOCK
  14         select RTC_LIB
  15         select SYS_SUPPORTS_APM_EMULATION
  16         select GENERIC_ATOMIC64 if (!CPU_32v6K)
  17         select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  18         select HAVE_ARCH_KGDB
  19         select HAVE_KPROBES if (!XIP_KERNEL)
  20         select HAVE_KRETPROBES if (HAVE_KPROBES)
  21         select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  22         select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  23         select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  24         select HAVE_GENERIC_DMA_COHERENT
  25         select HAVE_KERNEL_GZIP
  26         select HAVE_KERNEL_LZO
  27         select HAVE_KERNEL_LZMA
  28         select HAVE_IRQ_WORK
  29         select HAVE_PERF_EVENTS
  30         select PERF_USE_VMALLOC
  31         select HAVE_REGS_AND_STACK_ACCESS_API
  32         select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V7))
  33         help
  34           The ARM series is a line of low-power-consumption RISC chip designs
  35           licensed by ARM Ltd and targeted at embedded applications and
  36           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  37           manufactured, but legacy ARM-based PC hardware remains popular in
  38           Europe.  There is an ARM Linux project with a web page at
  39           <http://www.arm.linux.org.uk/>.
  40
  41 config HAVE_PWM
  42         bool
  43
  44 config SYS_SUPPORTS_APM_EMULATION
  45         bool
  46
  47 config GENERIC_GPIO
  48         bool
  49
  50 config ARCH_USES_GETTIMEOFFSET
  51         bool
  52         default n
  53
  54 config GENERIC_CLOCKEVENTS
  55         bool
  56
  57 config GENERIC_CLOCKEVENTS_BROADCAST
  58         bool
  59         depends on GENERIC_CLOCKEVENTS
  60         default y if SMP
  61
  62 config HAVE_TCM
  63         bool
  64         select GENERIC_ALLOCATOR
  65
  66 config HAVE_PROC_CPU
  67         bool
  68
  69 config NO_IOPORT
  70         bool
  71
  72 config EISA
  73         bool
  74         ---help---
  75           The Extended Industry Standard Architecture (EISA) bus was
  76           developed as an open alternative to the IBM MicroChannel bus.
  77
  78           The EISA bus provided some of the features of the IBM MicroChannel
  79           bus while maintaining backward compatibility with cards made for
  80           the older ISA bus.  The EISA bus saw limited use between 1988 and
  81           1995 when it was made obsolete by the PCI bus.
  82
  83           Say Y here if you are building a kernel for an EISA-based machine.
  84
  85           Otherwise, say N.
  86
  87 config SBUS
  88         bool
  89
  90 config MCA
  91         bool
  92         help
  93           MicroChannel Architecture is found in some IBM PS/2 machines and
  94           laptops.  It is a bus system similar to PCI or ISA. See
  95           <file:Documentation/mca.txt> (and especially the web page given
  96           there) before attempting to build an MCA bus kernel.
  97
  98 config GENERIC_HARDIRQS
  99         bool
 100         default y
 101
 102 config STACKTRACE_SUPPORT
 103         bool
 104         default y
 105
 106 config HAVE_LATENCYTOP_SUPPORT
 107         bool
 108         depends on !SMP
 109         default y
 110
 111 config LOCKDEP_SUPPORT
 112         bool
 113         default y
 114
 115 config TRACE_IRQFLAGS_SUPPORT
 116         bool
 117         default y
 118
 119 config HARDIRQS_SW_RESEND
 120         bool
 121         default y
 122
 123 config GENERIC_IRQ_PROBE
 124         bool
 125         default y
 126
 127 config GENERIC_LOCKBREAK
 128         bool
 129         default y
 130         depends on SMP && PREEMPT
 131
 132 config RWSEM_GENERIC_SPINLOCK
 133         bool
 134         default y
 135
 136 config RWSEM_XCHGADD_ALGORITHM
 137         bool
 138
 139 config ARCH_HAS_ILOG2_U32
 140         bool
 141
 142 config ARCH_HAS_ILOG2_U64
 143         bool
 144
 145 config ARCH_HAS_CPUFREQ
 146         bool
 147         help
 148           Internal node to signify that the ARCH has CPUFREQ support
 149           and that the relevant menu configurations are displayed for
 150           it.
 151
 152 config ARCH_HAS_CPU_IDLE_WAIT
 153        def_bool y
 154
 155 config GENERIC_HWEIGHT
 156         bool
 157         default y
 158
 159 config GENERIC_CALIBRATE_DELAY
 160         bool
 161         default y
 162
 163 config ARCH_MAY_HAVE_PC_FDC
 164         bool
 165
 166 config ZONE_DMA
 167         bool
 168
 169 config NEED_DMA_MAP_STATE
 170        def_bool y
 171
 172 config GENERIC_ISA_DMA
 173         bool
 174
 175 config FIQ
 176         bool
 177
 178 config ARCH_MTD_XIP
 179         bool
 180
 181 config GENERIC_HARDIRQS_NO__DO_IRQ
 182         def_bool y
 183
 184 config ARM_L1_CACHE_SHIFT_6
 185         bool
 186         help
 187           Setting ARM L1 cache line size to 64 Bytes.
 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 source "init/Kconfig"
 198
 199 source "kernel/Kconfig.freezer"
 200
 201 menu "System Type"
 202
 203 config MMU
 204         bool "MMU-based Paged Memory Management Support"
 205         default y
 206         help
 207           Select if you want MMU-based virtualised addressing space
 208           support by paged memory management. If unsure, say 'Y'.
 209
 210 #
 211 # The "ARM system type" choice list is ordered alphabetically by option
 212 # text.  Please add new entries in the option alphabetic order.
 213 #
 214 choice
 215         prompt "ARM system type"
 216         default ARCH_VERSATILE
 217
 218 config ARCH_AAEC2000
 219         bool "Agilent AAEC-2000 based"
 220         select CPU_ARM920T
 221         select ARM_AMBA
 222         select HAVE_CLK
 223         select ARCH_USES_GETTIMEOFFSET
 224         help
 225           This enables support for systems based on the Agilent AAEC-2000
 226
 227 config ARCH_INTEGRATOR
 228         bool "ARM Ltd. Integrator family"
 229         select ARM_AMBA
 230         select ARCH_HAS_CPUFREQ
 231         select COMMON_CLKDEV
 232         select ICST
 233         select GENERIC_CLOCKEVENTS
 234         select PLAT_VERSATILE
 235         help
 236           Support for ARM's Integrator platform.
 237
 238 config ARCH_REALVIEW
 239         bool "ARM Ltd. RealView family"
 240         select ARM_AMBA
 241         select COMMON_CLKDEV
 242         select ICST
 243         select GENERIC_CLOCKEVENTS
 244         select ARCH_WANT_OPTIONAL_GPIOLIB
 245         select PLAT_VERSATILE
 246         select ARM_TIMER_SP804
 247         select GPIO_PL061 if GPIOLIB
 248         help
 249           This enables support for ARM Ltd RealView boards.
 250
 251 config ARCH_VERSATILE
 252         bool "ARM Ltd. Versatile family"
 253         select ARM_AMBA
 254         select ARM_VIC
 255         select COMMON_CLKDEV
 256         select ICST
 257         select GENERIC_CLOCKEVENTS
 258         select ARCH_WANT_OPTIONAL_GPIOLIB
 259         select PLAT_VERSATILE
 260         select ARM_TIMER_SP804
 261         help
 262           This enables support for ARM Ltd Versatile board.
 263
 264 config ARCH_VEXPRESS
 265         bool "ARM Ltd. Versatile Express family"
 266         select ARCH_WANT_OPTIONAL_GPIOLIB
 267         select ARM_AMBA
 268         select ARM_TIMER_SP804
 269         select COMMON_CLKDEV
 270         select GENERIC_CLOCKEVENTS
 271         select HAVE_CLK
 272         select ICST
 273         select PLAT_VERSATILE
 274         help
 275           This enables support for the ARM Ltd Versatile Express boards.
 276
 277 config ARCH_AT91
 278         bool "Atmel AT91"
 279         select ARCH_REQUIRE_GPIOLIB
 280         select HAVE_CLK
 281         help
 282           This enables support for systems based on the Atmel AT91RM9200,
 283           AT91SAM9 and AT91CAP9 processors.
 284
 285 config ARCH_BCMRING
 286         bool "Broadcom BCMRING"
 287         depends on MMU
 288         select CPU_V6
 289         select ARM_AMBA
 290         select COMMON_CLKDEV
 291         select GENERIC_CLOCKEVENTS
 292         select ARCH_WANT_OPTIONAL_GPIOLIB
 293         help
 294           Support for Broadcom's BCMRing platform.
 295
 296 config ARCH_CLPS711X
 297         bool "Cirrus Logic CLPS711x/EP721x-based"
 298         select CPU_ARM720T
 299         select ARCH_USES_GETTIMEOFFSET
 300         help
 301           Support for Cirrus Logic 711x/721x based boards.
 302
 303 config ARCH_CNS3XXX
 304         bool "Cavium Networks CNS3XXX family"
 305         select CPU_V6
 306         select GENERIC_CLOCKEVENTS
 307         select ARM_GIC
 308         select PCI_DOMAINS if PCI
 309         help
 310           Support for Cavium Networks CNS3XXX platform.
 311
 312 config ARCH_GEMINI
 313         bool "Cortina Systems Gemini"
 314         select CPU_FA526
 315         select ARCH_REQUIRE_GPIOLIB
 316         select ARCH_USES_GETTIMEOFFSET
 317         help
 318           Support for the Cortina Systems Gemini family SoCs
 319
 320 config ARCH_EBSA110
 321         bool "EBSA-110"
 322         select CPU_SA110
 323         select ISA
 324         select NO_IOPORT
 325         select ARCH_USES_GETTIMEOFFSET
 326         help
 327           This is an evaluation board for the StrongARM processor available
 328           from Digital. It has limited hardware on-board, including an
 329           Ethernet interface, two PCMCIA sockets, two serial ports and a
 330           parallel port.
 331
 332 config ARCH_EP93XX
 333         bool "EP93xx-based"
 334         select CPU_ARM920T
 335         select ARM_AMBA
 336         select ARM_VIC
 337         select COMMON_CLKDEV
 338         select ARCH_REQUIRE_GPIOLIB
 339         select ARCH_HAS_HOLES_MEMORYMODEL
 340         select ARCH_USES_GETTIMEOFFSET
 341         help
 342           This enables support for the Cirrus EP93xx series of CPUs.
 343
 344 config ARCH_FOOTBRIDGE
 345         bool "FootBridge"
 346         select CPU_SA110
 347         select FOOTBRIDGE
 348         select ARCH_USES_GETTIMEOFFSET
 349         help
 350           Support for systems based on the DC21285 companion chip
 351           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 352
 353 config ARCH_MXC
 354         bool "Freescale MXC/iMX-based"
 355         select GENERIC_CLOCKEVENTS
 356         select ARCH_REQUIRE_GPIOLIB
 357         select COMMON_CLKDEV
 358         help
 359           Support for Freescale MXC/iMX-based family of processors
 360
 361 config ARCH_STMP3XXX
 362         bool "Freescale STMP3xxx"
 363         select CPU_ARM926T
 364         select COMMON_CLKDEV
 365         select ARCH_REQUIRE_GPIOLIB
 366         select GENERIC_CLOCKEVENTS
 367         select USB_ARCH_HAS_EHCI
 368         help
 369           Support for systems based on the Freescale 3xxx CPUs.
 370
 371 config ARCH_NETX
 372         bool "Hilscher NetX based"
 373         select CPU_ARM926T
 374         select ARM_VIC
 375         select GENERIC_CLOCKEVENTS
 376         help
 377           This enables support for systems based on the Hilscher NetX Soc
 378
 379 config ARCH_H720X
 380         bool "Hynix HMS720x-based"
 381         select CPU_ARM720T
 382         select ISA_DMA_API
 383         select ARCH_USES_GETTIMEOFFSET
 384         help
 385           This enables support for systems based on the Hynix HMS720x
 386
 387 config ARCH_IOP13XX
 388         bool "IOP13xx-based"
 389         depends on MMU
 390         select CPU_XSC3
 391         select PLAT_IOP
 392         select PCI
 393         select ARCH_SUPPORTS_MSI
 394         select VMSPLIT_1G
 395         help
 396           Support for Intel's IOP13XX (XScale) family of processors.
 397
 398 config ARCH_IOP32X
 399         bool "IOP32x-based"
 400         depends on MMU
 401         select CPU_XSCALE
 402         select PLAT_IOP
 403         select PCI
 404         select ARCH_REQUIRE_GPIOLIB
 405         help
 406           Support for Intel's 80219 and IOP32X (XScale) family of
 407           processors.
 408
 409 config ARCH_IOP33X
 410         bool "IOP33x-based"
 411         depends on MMU
 412         select CPU_XSCALE
 413         select PLAT_IOP
 414         select PCI
 415         select ARCH_REQUIRE_GPIOLIB
 416         help
 417           Support for Intel's IOP33X (XScale) family of processors.
 418
 419 config ARCH_IXP23XX
 420         bool "IXP23XX-based"
 421         depends on MMU
 422         select CPU_XSC3
 423         select PCI
 424         select ARCH_USES_GETTIMEOFFSET
 425         help
 426           Support for Intel's IXP23xx (XScale) family of processors.
 427
 428 config ARCH_IXP2000
 429         bool "IXP2400/2800-based"
 430         depends on MMU
 431         select CPU_XSCALE
 432         select PCI
 433         select ARCH_USES_GETTIMEOFFSET
 434         help
 435           Support for Intel's IXP2400/2800 (XScale) family of processors.
 436
 437 config ARCH_IXP4XX
 438         bool "IXP4xx-based"
 439         depends on MMU
 440         select CPU_XSCALE
 441         select GENERIC_GPIO
 442         select GENERIC_CLOCKEVENTS
 443         select DMABOUNCE if PCI
 444         help
 445           Support for Intel's IXP4XX (XScale) family of processors.
 446
 447 config ARCH_DOVE
 448         bool "Marvell Dove"
 449         select PCI
 450         select ARCH_REQUIRE_GPIOLIB
 451         select GENERIC_CLOCKEVENTS
 452         select PLAT_ORION
 453         help
 454           Support for the Marvell Dove SoC 88AP510
 455
 456 config ARCH_KIRKWOOD
 457         bool "Marvell Kirkwood"
 458         select CPU_FEROCEON
 459         select PCI
 460         select ARCH_REQUIRE_GPIOLIB
 461         select GENERIC_CLOCKEVENTS
 462         select PLAT_ORION
 463         help
 464           Support for the following Marvell Kirkwood series SoCs:
 465           88F6180, 88F6192 and 88F6281.
 466
 467 config ARCH_LOKI
 468         bool "Marvell Loki (88RC8480)"
 469         select CPU_FEROCEON
 470         select GENERIC_CLOCKEVENTS
 471         select PLAT_ORION
 472         help
 473           Support for the Marvell Loki (88RC8480) SoC.
 474
 475 config ARCH_LPC32XX
 476         bool "NXP LPC32XX"
 477         select CPU_ARM926T
 478         select ARCH_REQUIRE_GPIOLIB
 479         select HAVE_IDE
 480         select ARM_AMBA
 481         select USB_ARCH_HAS_OHCI
 482         select COMMON_CLKDEV
 483         select GENERIC_TIME
 484         select GENERIC_CLOCKEVENTS
 485         help
 486           Support for the NXP LPC32XX family of processors
 487
 488 config ARCH_MV78XX0
 489         bool "Marvell MV78xx0"
 490         select CPU_FEROCEON
 491         select PCI
 492         select ARCH_REQUIRE_GPIOLIB
 493         select GENERIC_CLOCKEVENTS
 494         select PLAT_ORION
 495         help
 496           Support for the following Marvell MV78xx0 series SoCs:
 497           MV781x0, MV782x0.
 498
 499 config ARCH_ORION5X
 500         bool "Marvell Orion"
 501         depends on MMU
 502         select CPU_FEROCEON
 503         select PCI
 504         select ARCH_REQUIRE_GPIOLIB
 505         select GENERIC_CLOCKEVENTS
 506         select PLAT_ORION
 507         help
 508           Support for the following Marvell Orion 5x series SoCs:
 509           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 510           Orion-2 (5281), Orion-1-90 (6183).
 511
 512 config ARCH_MMP
 513         bool "Marvell PXA168/910/MMP2"
 514         depends on MMU
 515         select ARCH_REQUIRE_GPIOLIB
 516         select COMMON_CLKDEV
 517         select GENERIC_CLOCKEVENTS
 518         select TICK_ONESHOT
 519         select PLAT_PXA
 520         select SPARSE_IRQ
 521         help
 522           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 523
 524 config ARCH_KS8695
 525         bool "Micrel/Kendin KS8695"
 526         select CPU_ARM922T
 527         select ARCH_REQUIRE_GPIOLIB
 528         select ARCH_USES_GETTIMEOFFSET
 529         help
 530           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 531           System-on-Chip devices.
 532
 533 config ARCH_NS9XXX
 534         bool "NetSilicon NS9xxx"
 535         select CPU_ARM926T
 536         select GENERIC_GPIO
 537         select GENERIC_CLOCKEVENTS
 538         select HAVE_CLK
 539         help
 540           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 541           System.
 542
 543           <http://www.digi.com/products/microprocessors/index.jsp>
 544
 545 config ARCH_W90X900
 546         bool "Nuvoton W90X900 CPU"
 547         select CPU_ARM926T
 548         select ARCH_REQUIRE_GPIOLIB
 549         select COMMON_CLKDEV
 550         select GENERIC_CLOCKEVENTS
 551         help
 552           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 553           At present, the w90x900 has been renamed nuc900, regarding
 554           the ARM series product line, you can login the following
 555           link address to know more.
 556
 557           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 558                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 559
 560 config ARCH_NUC93X
 561         bool "Nuvoton NUC93X CPU"
 562         select CPU_ARM926T
 563         select COMMON_CLKDEV
 564         help
 565           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 566           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 567
 568 config ARCH_TEGRA
 569         bool "NVIDIA Tegra"
 570         select GENERIC_TIME
 571         select GENERIC_CLOCKEVENTS
 572         select GENERIC_GPIO
 573         select HAVE_CLK
 574         select COMMON_CLKDEV
 575         select ARCH_HAS_BARRIERS if CACHE_L2X0
 576         select ARCH_HAS_CPUFREQ
 577         help
 578           This enables support for NVIDIA Tegra based systems (Tegra APX,
 579           Tegra 6xx and Tegra 2 series).
 580
 581 config ARCH_PNX4008
 582         bool "Philips Nexperia PNX4008 Mobile"
 583         select CPU_ARM926T
 584         select COMMON_CLKDEV
 585         select ARCH_USES_GETTIMEOFFSET
 586         help
 587           This enables support for Philips PNX4008 mobile platform.
 588
 589 config ARCH_PXA
 590         bool "PXA2xx/PXA3xx-based"
 591         depends on MMU
 592         select ARCH_MTD_XIP
 593         select ARCH_HAS_CPUFREQ
 594         select COMMON_CLKDEV
 595         select ARCH_REQUIRE_GPIOLIB
 596         select GENERIC_CLOCKEVENTS
 597         select TICK_ONESHOT
 598         select PLAT_PXA
 599         select SPARSE_IRQ
 600         help
 601           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 602
 603 config ARCH_MSM
 604         bool "Qualcomm MSM"
 605         select HAVE_CLK
 606         select GENERIC_CLOCKEVENTS
 607         select ARCH_REQUIRE_GPIOLIB
 608         help
 609           Support for Qualcomm MSM/QSD based systems.  This runs on the
 610           apps processor of the MSM/QSD and depends on a shared memory
 611           interface to the modem processor which runs the baseband
 612           stack and controls some vital subsystems
 613           (clock and power control, etc).
 614
 615 config ARCH_SHMOBILE
 616         bool "Renesas SH-Mobile"
 617         help
 618           Support for Renesas's SH-Mobile ARM platforms
 619
 620 config ARCH_RPC
 621         bool "RiscPC"
 622         select ARCH_ACORN
 623         select FIQ
 624         select TIMER_ACORN
 625         select ARCH_MAY_HAVE_PC_FDC
 626         select HAVE_PATA_PLATFORM
 627         select ISA_DMA_API
 628         select NO_IOPORT
 629         select ARCH_SPARSEMEM_ENABLE
 630         select ARCH_USES_GETTIMEOFFSET
 631         help
 632           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 633           CD-ROM interface, serial and parallel port, and the floppy drive.
 634
 635 config ARCH_SA1100
 636         bool "SA1100-based"
 637         select CPU_SA1100
 638         select ISA
 639         select ARCH_SPARSEMEM_ENABLE
 640         select ARCH_MTD_XIP
 641         select ARCH_HAS_CPUFREQ
 642         select CPU_FREQ
 643         select GENERIC_CLOCKEVENTS
 644         select HAVE_CLK
 645         select TICK_ONESHOT
 646         select ARCH_REQUIRE_GPIOLIB
 647         help
 648           Support for StrongARM 11x0 based boards.
 649
 650 config ARCH_S3C2410
 651         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
 652         select GENERIC_GPIO
 653         select ARCH_HAS_CPUFREQ
 654         select HAVE_CLK
 655         select ARCH_USES_GETTIMEOFFSET
 656         select HAVE_S3C2410_I2C
 657         help
 658           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 659           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 660           the Samsung SMDK2410 development board (and derivatives).
 661
 662           Note, the S3C2416 and the S3C2450 are so close that they even share
 663           the same SoC ID code. This means that there is no seperate machine
 664           directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
 665
 666 config ARCH_S3C64XX
 667         bool "Samsung S3C64XX"
 668         select PLAT_SAMSUNG
 669         select CPU_V6
 670         select ARM_VIC
 671         select HAVE_CLK
 672         select NO_IOPORT
 673         select ARCH_USES_GETTIMEOFFSET
 674         select ARCH_HAS_CPUFREQ
 675         select ARCH_REQUIRE_GPIOLIB
 676         select SAMSUNG_CLKSRC
 677         select SAMSUNG_IRQ_VIC_TIMER
 678         select SAMSUNG_IRQ_UART
 679         select S3C_GPIO_TRACK
 680         select S3C_GPIO_PULL_UPDOWN
 681         select S3C_GPIO_CFG_S3C24XX
 682         select S3C_GPIO_CFG_S3C64XX
 683         select S3C_DEV_NAND
 684         select USB_ARCH_HAS_OHCI
 685         select SAMSUNG_GPIOLIB_4BIT
 686         select HAVE_S3C2410_I2C
 687         select HAVE_S3C2410_WATCHDOG
 688         help
 689           Samsung S3C64XX series based systems
 690
 691 config ARCH_S5P64X0
 692         bool "Samsung S5P6440 S5P6450"
 693         select CPU_V6
 694         select GENERIC_GPIO
 695         select HAVE_CLK
 696         select HAVE_S3C2410_WATCHDOG
 697         select ARCH_USES_GETTIMEOFFSET
 698         select HAVE_S3C2410_I2C
 699         select HAVE_S3C_RTC
 700         help
 701           Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
 702           SMDK6450.
 703
 704 config ARCH_S5P6442
 705         bool "Samsung S5P6442"
 706         select CPU_V6
 707         select GENERIC_GPIO
 708         select HAVE_CLK
 709         select ARCH_USES_GETTIMEOFFSET
 710         select HAVE_S3C2410_WATCHDOG
 711         help
 712           Samsung S5P6442 CPU based systems
 713
 714 config ARCH_S5PC100
 715         bool "Samsung S5PC100"
 716         select GENERIC_GPIO
 717         select HAVE_CLK
 718         select CPU_V7
 719         select ARM_L1_CACHE_SHIFT_6
 720         select ARCH_USES_GETTIMEOFFSET
 721         select HAVE_S3C2410_I2C
 722         select HAVE_S3C_RTC
 723         select HAVE_S3C2410_WATCHDOG
 724         help
 725           Samsung S5PC100 series based systems
 726
 727 config ARCH_S5PV210
 728         bool "Samsung S5PV210/S5PC110"
 729         select CPU_V7
 730         select GENERIC_GPIO
 731         select HAVE_CLK
 732         select ARM_L1_CACHE_SHIFT_6
 733         select ARCH_USES_GETTIMEOFFSET
 734         select HAVE_S3C2410_I2C
 735         select HAVE_S3C_RTC
 736         select HAVE_S3C2410_WATCHDOG
 737         help
 738           Samsung S5PV210/S5PC110 series based systems
 739
 740 config ARCH_S5PV310
 741         bool "Samsung S5PV310/S5PC210"
 742         select CPU_V7
 743         select GENERIC_GPIO
 744         select HAVE_CLK
 745         select GENERIC_CLOCKEVENTS
 746         help
 747           Samsung S5PV310 series based systems
 748
 749 config ARCH_SHARK
 750         bool "Shark"
 751         select CPU_SA110
 752         select ISA
 753         select ISA_DMA
 754         select ZONE_DMA
 755         select PCI
 756         select ARCH_USES_GETTIMEOFFSET
 757         help
 758           Support for the StrongARM based Digital DNARD machine, also known
 759           as "Shark" (<http://www.shark-linux.de/shark.html>).
 760
 761 config ARCH_TCC_926
 762         bool "Telechips TCC ARM926-based systems"
 763         select CPU_ARM926T
 764         select HAVE_CLK
 765         select COMMON_CLKDEV
 766         select GENERIC_CLOCKEVENTS
 767         help
 768           Support for Telechips TCC ARM926-based systems.
 769
 770 config ARCH_LH7A40X
 771         bool "Sharp LH7A40X"
 772         select CPU_ARM922T
 773         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 774         select ARCH_USES_GETTIMEOFFSET
 775         help
 776           Say Y here for systems based on one of the Sharp LH7A40X
 777           System on a Chip processors.  These CPUs include an ARM922T
 778           core with a wide array of integrated devices for
 779           hand-held and low-power applications.
 780
 781 config ARCH_U300
 782         bool "ST-Ericsson U300 Series"
 783         depends on MMU
 784         select CPU_ARM926T
 785         select HAVE_TCM
 786         select ARM_AMBA
 787         select ARM_VIC
 788         select GENERIC_CLOCKEVENTS
 789         select COMMON_CLKDEV
 790         select GENERIC_GPIO
 791         help
 792           Support for ST-Ericsson U300 series mobile platforms.
 793
 794 config ARCH_U8500
 795         bool "ST-Ericsson U8500 Series"
 796         select CPU_V7
 797         select ARM_AMBA
 798         select GENERIC_CLOCKEVENTS
 799         select COMMON_CLKDEV
 800         select ARCH_REQUIRE_GPIOLIB
 801         help
 802           Support for ST-Ericsson's Ux500 architecture
 803
 804 config ARCH_NOMADIK
 805         bool "STMicroelectronics Nomadik"
 806         select ARM_AMBA
 807         select ARM_VIC
 808         select CPU_ARM926T
 809         select COMMON_CLKDEV
 810         select GENERIC_CLOCKEVENTS
 811         select ARCH_REQUIRE_GPIOLIB
 812         help
 813           Support for the Nomadik platform by ST-Ericsson
 814
 815 config ARCH_DAVINCI
 816         bool "TI DaVinci"
 817         select GENERIC_CLOCKEVENTS
 818         select ARCH_REQUIRE_GPIOLIB
 819         select ZONE_DMA
 820         select HAVE_IDE
 821         select COMMON_CLKDEV
 822         select GENERIC_ALLOCATOR
 823         select ARCH_HAS_HOLES_MEMORYMODEL
 824         help
 825           Support for TI's DaVinci platform.
 826
 827 config ARCH_OMAP
 828         bool "TI OMAP"
 829         select HAVE_CLK
 830         select ARCH_REQUIRE_GPIOLIB
 831         select ARCH_HAS_CPUFREQ
 832         select GENERIC_CLOCKEVENTS
 833         select ARCH_HAS_HOLES_MEMORYMODEL
 834         help
 835           Support for TI's OMAP platform (OMAP1/2/3/4).
 836
 837 config PLAT_SPEAR
 838         bool "ST SPEAr"
 839         select ARM_AMBA
 840         select ARCH_REQUIRE_GPIOLIB
 841         select COMMON_CLKDEV
 842         select GENERIC_CLOCKEVENTS
 843         select HAVE_CLK
 844         help
 845           Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
 846
 847 endchoice
 848
 849 #
 850 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 851 # Kconfigs may be included either alphabetically (according to the
 852 # plat- suffix) or along side the corresponding mach-* source.
 853 #
 854 source "arch/arm/mach-aaec2000/Kconfig"
 855
 856 source "arch/arm/mach-at91/Kconfig"
 857
 858 source "arch/arm/mach-bcmring/Kconfig"
 859
 860 source "arch/arm/mach-clps711x/Kconfig"
 861
 862 source "arch/arm/mach-cns3xxx/Kconfig"
 863
 864 source "arch/arm/mach-davinci/Kconfig"
 865
 866 source "arch/arm/mach-dove/Kconfig"
 867
 868 source "arch/arm/mach-ep93xx/Kconfig"
 869
 870 source "arch/arm/mach-footbridge/Kconfig"
 871
 872 source "arch/arm/mach-gemini/Kconfig"
 873
 874 source "arch/arm/mach-h720x/Kconfig"
 875
 876 source "arch/arm/mach-integrator/Kconfig"
 877
 878 source "arch/arm/mach-iop32x/Kconfig"
 879
 880 source "arch/arm/mach-iop33x/Kconfig"
 881
 882 source "arch/arm/mach-iop13xx/Kconfig"
 883
 884 source "arch/arm/mach-ixp4xx/Kconfig"
 885
 886 source "arch/arm/mach-ixp2000/Kconfig"
 887
 888 source "arch/arm/mach-ixp23xx/Kconfig"
 889
 890 source "arch/arm/mach-kirkwood/Kconfig"
 891
 892 source "arch/arm/mach-ks8695/Kconfig"
 893
 894 source "arch/arm/mach-lh7a40x/Kconfig"
 895
 896 source "arch/arm/mach-loki/Kconfig"
 897
 898 source "arch/arm/mach-lpc32xx/Kconfig"
 899
 900 source "arch/arm/mach-msm/Kconfig"
 901
 902 source "arch/arm/mach-mv78xx0/Kconfig"
 903
 904 source "arch/arm/plat-mxc/Kconfig"
 905
 906 source "arch/arm/mach-netx/Kconfig"
 907
 908 source "arch/arm/mach-nomadik/Kconfig"
 909 source "arch/arm/plat-nomadik/Kconfig"
 910
 911 source "arch/arm/mach-ns9xxx/Kconfig"
 912
 913 source "arch/arm/mach-nuc93x/Kconfig"
 914
 915 source "arch/arm/plat-omap/Kconfig"
 916
 917 source "arch/arm/mach-omap1/Kconfig"
 918
 919 source "arch/arm/mach-omap2/Kconfig"
 920
 921 source "arch/arm/mach-orion5x/Kconfig"
 922
 923 source "arch/arm/mach-pxa/Kconfig"
 924 source "arch/arm/plat-pxa/Kconfig"
 925
 926 source "arch/arm/mach-mmp/Kconfig"
 927
 928 source "arch/arm/mach-realview/Kconfig"
 929
 930 source "arch/arm/mach-sa1100/Kconfig"
 931
 932 source "arch/arm/plat-samsung/Kconfig"
 933 source "arch/arm/plat-s3c24xx/Kconfig"
 934 source "arch/arm/plat-s5p/Kconfig"
 935
 936 source "arch/arm/plat-spear/Kconfig"
 937
 938 source "arch/arm/plat-tcc/Kconfig"
 939
 940 if ARCH_S3C2410
 941 source "arch/arm/mach-s3c2400/Kconfig"
 942 source "arch/arm/mach-s3c2410/Kconfig"
 943 source "arch/arm/mach-s3c2412/Kconfig"
 944 source "arch/arm/mach-s3c2416/Kconfig"
 945 source "arch/arm/mach-s3c2440/Kconfig"
 946 source "arch/arm/mach-s3c2443/Kconfig"
 947 endif
 948
 949 if ARCH_S3C64XX
 950 source "arch/arm/mach-s3c64xx/Kconfig"
 951 endif
 952
 953 source "arch/arm/mach-s5p64x0/Kconfig"
 954
 955 source "arch/arm/mach-s5p6442/Kconfig"
 956
 957 source "arch/arm/mach-s5pc100/Kconfig"
 958
 959 source "arch/arm/mach-s5pv210/Kconfig"
 960
 961 source "arch/arm/mach-s5pv310/Kconfig"
 962
 963 source "arch/arm/mach-shmobile/Kconfig"
 964
 965 source "arch/arm/plat-stmp3xxx/Kconfig"
 966
 967 source "arch/arm/mach-tegra/Kconfig"
 968
 969 source "arch/arm/mach-u300/Kconfig"
 970
 971 source "arch/arm/mach-ux500/Kconfig"
 972
 973 source "arch/arm/mach-versatile/Kconfig"
 974
 975 source "arch/arm/mach-vexpress/Kconfig"
 976
 977 source "arch/arm/mach-w90x900/Kconfig"
 978
 979 # Definitions to make life easier
 980 config ARCH_ACORN
 981         bool
 982
 983 config PLAT_IOP
 984         bool
 985         select GENERIC_CLOCKEVENTS
 986
 987 config PLAT_ORION
 988         bool
 989
 990 config PLAT_PXA
 991         bool
 992
 993 config PLAT_VERSATILE
 994         bool
 995
 996 config ARM_TIMER_SP804
 997         bool
 998
 999 source arch/arm/mm/Kconfig
1000
1001 config IWMMXT
1002         bool "Enable iWMMXt support"
1003         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
1004         default y if PXA27x || PXA3xx || ARCH_MMP
1005         help
1006           Enable support for iWMMXt context switching at run time if
1007           running on a CPU that supports it.
1008
1009 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
1010 config XSCALE_PMU
1011         bool
1012         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
1013         default y
1014
1015 config CPU_HAS_PMU
1016         depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
1017                    (!ARCH_OMAP3 || OMAP3_EMU)
1018         default y
1019         bool
1020
1021 if !MMU
1022 source "arch/arm/Kconfig-nommu"
1023 endif
1024
1025 config ARM_ERRATA_411920
1026         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1027         depends on CPU_V6
1028         help
1029           Invalidation of the Instruction Cache operation can
1030           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1031           It does not affect the MPCore. This option enables the ARM Ltd.
1032           recommended workaround.
1033
1034 config ARM_ERRATA_430973
1035         bool "ARM errata: Stale prediction on replaced interworking branch"
1036         depends on CPU_V7
1037         help
1038           This option enables the workaround for the 430973 Cortex-A8
1039           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1040           interworking branch is replaced with another code sequence at the
1041           same virtual address, whether due to self-modifying code or virtual
1042           to physical address re-mapping, Cortex-A8 does not recover from the
1043           stale interworking branch prediction. This results in Cortex-A8
1044           executing the new code sequence in the incorrect ARM or Thumb state.
1045           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1046           and also flushes the branch target cache at every context switch.
1047           Note that setting specific bits in the ACTLR register may not be
1048           available in non-secure mode.
1049
1050 config ARM_ERRATA_458693
1051         bool "ARM errata: Processor deadlock when a false hazard is created"
1052         depends on CPU_V7
1053         help
1054           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1055           erratum. For very specific sequences of memory operations, it is
1056           possible for a hazard condition intended for a cache line to instead
1057           be incorrectly associated with a different cache line. This false
1058           hazard might then cause a processor deadlock. The workaround enables
1059           the L1 caching of the NEON accesses and disables the PLD instruction
1060           in the ACTLR register. Note that setting specific bits in the ACTLR
1061           register may not be available in non-secure mode.
1062
1063 config ARM_ERRATA_460075
1064         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1065         depends on CPU_V7
1066         help
1067           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1068           erratum. Any asynchronous access to the L2 cache may encounter a
1069           situation in which recent store transactions to the L2 cache are lost
1070           and overwritten with stale memory contents from external memory. The
1071           workaround disables the write-allocate mode for the L2 cache via the
1072           ACTLR register. Note that setting specific bits in the ACTLR register
1073           may not be available in non-secure mode.
1074
1075 config ARM_ERRATA_742230
1076         bool "ARM errata: DMB operation may be faulty"
1077         depends on CPU_V7 && SMP
1078         help
1079           This option enables the workaround for the 742230 Cortex-A9
1080           (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1081           between two write operations may not ensure the correct visibility
1082           ordering of the two writes. This workaround sets a specific bit in
1083           the diagnostic register of the Cortex-A9 which causes the DMB
1084           instruction to behave as a DSB, ensuring the correct behaviour of
1085           the two writes.
1086
1087 config ARM_ERRATA_742231
1088         bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1089         depends on CPU_V7 && SMP
1090         help
1091           This option enables the workaround for the 742231 Cortex-A9
1092           (r2p0..r2p2) erratum. Under certain conditions, specific to the
1093           Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1094           accessing some data located in the same cache line, may get corrupted
1095           data due to bad handling of the address hazard when the line gets
1096           replaced from one of the CPUs at the same time as another CPU is
1097           accessing it. This workaround sets specific bits in the diagnostic
1098           register of the Cortex-A9 which reduces the linefill issuing
1099           capabilities of the processor.
1100
1101 config PL310_ERRATA_588369
1102         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1103         depends on CACHE_L2X0 && ARCH_OMAP4
1104         help
1105            The PL310 L2 cache controller implements three types of Clean &
1106            Invalidate maintenance operations: by Physical Address
1107            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1108            They are architecturally defined to behave as the execution of a
1109            clean operation followed immediately by an invalidate operation,
1110            both performing to the same memory location. This functionality
1111            is not correctly implemented in PL310 as clean lines are not
1112            invalidated as a result of these operations. Note that this errata
1113            uses Texas Instrument's secure monitor api.
1114
1115 config ARM_ERRATA_720789
1116         bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1117         depends on CPU_V7 && SMP
1118         help
1119           This option enables the workaround for the 720789 Cortex-A9 (prior to
1120           r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1121           broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1122           As a consequence of this erratum, some TLB entries which should be
1123           invalidated are not, resulting in an incoherency in the system page
1124           tables. The workaround changes the TLB flushing routines to invalidate
1125           entries regardless of the ASID.
1126
1127 config ARM_ERRATA_743622
1128         bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1129         depends on CPU_V7
1130         help
1131           This option enables the workaround for the 743622 Cortex-A9
1132           (r2p0..r2p2) erratum. Under very rare conditions, a faulty
1133           optimisation in the Cortex-A9 Store Buffer may lead to data
1134           corruption. This workaround sets a specific bit in the diagnostic
1135           register of the Cortex-A9 which disables the Store Buffer
1136           optimisation, preventing the defect from occurring. This has no
1137           visible impact on the overall performance or power consumption of the
1138           processor.
1139
1140 endmenu
1141
1142 source "arch/arm/common/Kconfig"
1143
1144 menu "Bus support"
1145
1146 config ARM_AMBA
1147         bool
1148
1149 config ISA
1150         bool
1151         help
1152           Find out whether you have ISA slots on your motherboard.  ISA is the
1153           name of a bus system, i.e. the way the CPU talks to the other stuff
1154           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1155           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1156           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1157
1158 # Select ISA DMA controller support
1159 config ISA_DMA
1160         bool
1161         select ISA_DMA_API
1162
1163 # Select ISA DMA interface
1164 config ISA_DMA_API
1165         bool
1166
1167 config PCI
1168         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE || ARCH_CNS3XXX
1169         help
1170           Find out whether you have a PCI motherboard. PCI is the name of a
1171           bus system, i.e. the way the CPU talks to the other stuff inside
1172           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1173           VESA. If you have PCI, say Y, otherwise N.
1174
1175 config PCI_DOMAINS
1176         bool
1177         depends on PCI
1178
1179 config PCI_SYSCALL
1180         def_bool PCI
1181
1182 # Select the host bridge type
1183 config PCI_HOST_VIA82C505
1184         bool
1185         depends on PCI && ARCH_SHARK
1186         default y
1187
1188 config PCI_HOST_ITE8152
1189         bool
1190         depends on PCI && MACH_ARMCORE
1191         default y
1192         select DMABOUNCE
1193
1194 source "drivers/pci/Kconfig"
1195
1196 source "drivers/pcmcia/Kconfig"
1197
1198 endmenu
1199
1200 menu "Kernel Features"
1201
1202 source "kernel/time/Kconfig"
1203
1204 config SMP
1205         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1206         depends on EXPERIMENTAL
1207         depends on GENERIC_CLOCKEVENTS
1208         depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
1209                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
1210                  ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4
1211         select USE_GENERIC_SMP_HELPERS
1212         select HAVE_ARM_SCU
1213         help
1214           This enables support for systems with more than one CPU. If you have
1215           a system with only one CPU, like most personal computers, say N. If
1216           you have a system with more than one CPU, say Y.
1217
1218           If you say N here, the kernel will run on single and multiprocessor
1219           machines, but will use only one CPU of a multiprocessor machine. If
1220           you say Y here, the kernel will run on many, but not all, single
1221           processor machines. On a single processor machine, the kernel will
1222           run faster if you say N here.
1223
1224           See also <file:Documentation/i386/IO-APIC.txt>,
1225           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1226           <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1227
1228           If you don't know what to do here, say N.
1229
1230 config SMP_ON_UP
1231         bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1232         depends on EXPERIMENTAL
1233         depends on SMP && !XIP && !THUMB2_KERNEL
1234         default y
1235         help
1236           SMP kernels contain instructions which fail on non-SMP processors.
1237           Enabling this option allows the kernel to modify itself to make
1238           these instructions safe.  Disabling it allows about 1K of space
1239           savings.
1240
1241           If you don't know what to do here, say Y.
1242
1243 config HAVE_ARM_SCU
1244         bool
1245         depends on SMP
1246         help
1247           This option enables support for the ARM system coherency unit
1248
1249 config HAVE_ARM_TWD
1250         bool
1251         depends on SMP
1252         help
1253           This options enables support for the ARM timer and watchdog unit
1254
1255 choice
1256         prompt "Memory split"
1257         default VMSPLIT_3G
1258         help
1259           Select the desired split between kernel and user memory.
1260
1261           If you are not absolutely sure what you are doing, leave this
1262           option alone!
1263
1264         config VMSPLIT_3G
1265                 bool "3G/1G user/kernel split"
1266         config VMSPLIT_2G
1267                 bool "2G/2G user/kernel split"
1268         config VMSPLIT_1G
1269                 bool "1G/3G user/kernel split"
1270 endchoice
1271
1272 config PAGE_OFFSET
1273         hex
1274         default 0x40000000 if VMSPLIT_1G
1275         default 0x80000000 if VMSPLIT_2G
1276         default 0xC0000000
1277
1278 config NR_CPUS
1279         int "Maximum number of CPUs (2-32)"
1280         range 2 32
1281         depends on SMP
1282         default "4"
1283
1284 config HOTPLUG_CPU
1285         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1286         depends on SMP && HOTPLUG && EXPERIMENTAL
1287         help
1288           Say Y here to experiment with turning CPUs off and on.  CPUs
1289           can be controlled through /sys/devices/system/cpu.
1290
1291 config LOCAL_TIMERS
1292         bool "Use local timer interrupts"
1293         depends on SMP
1294         default y
1295         select HAVE_ARM_TWD
1296         help
1297           Enable support for local timers on SMP platforms, rather then the
1298           legacy IPI broadcast method.  Local timers allows the system
1299           accounting to be spread across the timer interval, preventing a
1300           "thundering herd" at every timer tick.
1301
1302 source kernel/Kconfig.preempt
1303
1304 config HZ
1305         int
1306         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
1307                 ARCH_S5P6442 || ARCH_S5PV210 || ARCH_S5PV310
1308         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1309         default AT91_TIMER_HZ if ARCH_AT91
1310         default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1311         default 100
1312
1313 config THUMB2_KERNEL
1314         bool "Compile the kernel in Thumb-2 mode"
1315         depends on CPU_V7 && EXPERIMENTAL
1316         select AEABI
1317         select ARM_ASM_UNIFIED
1318         help
1319           By enabling this option, the kernel will be compiled in
1320           Thumb-2 mode. A compiler/assembler that understand the unified
1321           ARM-Thumb syntax is needed.
1322
1323           If unsure, say N.
1324
1325 config ARM_ASM_UNIFIED
1326         bool
1327
1328 config AEABI
1329         bool "Use the ARM EABI to compile the kernel"
1330         help
1331           This option allows for the kernel to be compiled using the latest
1332           ARM ABI (aka EABI).  This is only useful if you are using a user
1333           space environment that is also compiled with EABI.
1334
1335           Since there are major incompatibilities between the legacy ABI and
1336           EABI, especially with regard to structure member alignment, this
1337           option also changes the kernel syscall calling convention to
1338           disambiguate both ABIs and allow for backward compatibility support
1339           (selected with CONFIG_OABI_COMPAT).
1340
1341           To use this you need GCC version 4.0.0 or later.
1342
1343 config OABI_COMPAT
1344         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1345         depends on AEABI && EXPERIMENTAL
1346         default y
1347         help
1348           This option preserves the old syscall interface along with the
1349           new (ARM EABI) one. It also provides a compatibility layer to
1350           intercept syscalls that have structure arguments which layout
1351           in memory differs between the legacy ABI and the new ARM EABI
1352           (only for non "thumb" binaries). This option adds a tiny
1353           overhead to all syscalls and produces a slightly larger kernel.
1354           If you know you'll be using only pure EABI user space then you
1355           can say N here. If this option is not selected and you attempt
1356           to execute a legacy ABI binary then the result will be
1357           UNPREDICTABLE (in fact it can be predicted that it won't work
1358           at all). If in doubt say Y.
1359
1360 config ARCH_HAS_HOLES_MEMORYMODEL
1361         bool
1362
1363 config ARCH_SPARSEMEM_ENABLE
1364         bool
1365
1366 config ARCH_SPARSEMEM_DEFAULT
1367         def_bool ARCH_SPARSEMEM_ENABLE
1368
1369 config ARCH_SELECT_MEMORY_MODEL
1370         def_bool ARCH_SPARSEMEM_ENABLE
1371
1372 config HIGHMEM
1373         bool "High Memory Support (EXPERIMENTAL)"
1374         depends on MMU && EXPERIMENTAL
1375         help
1376           The address space of ARM processors is only 4 Gigabytes large
1377           and it has to accommodate user address space, kernel address
1378           space as well as some memory mapped IO. That means that, if you
1379           have a large amount of physical memory and/or IO, not all of the
1380           memory can be "permanently mapped" by the kernel. The physical
1381           memory that is not permanently mapped is called "high memory".
1382
1383           Depending on the selected kernel/user memory split, minimum
1384           vmalloc space and actual amount of RAM, you may not need this
1385           option which should result in a slightly faster kernel.
1386
1387           If unsure, say n.
1388
1389 config HIGHPTE
1390         bool "Allocate 2nd-level pagetables from highmem"
1391         depends on HIGHMEM
1392         depends on !OUTER_CACHE
1393
1394 config HW_PERF_EVENTS
1395         bool "Enable hardware performance counter support for perf events"
1396         depends on PERF_EVENTS && CPU_HAS_PMU
1397         default y
1398         help
1399           Enable hardware performance counter support for perf events. If
1400           disabled, perf events will use software events only.
1401
1402 config SPARSE_IRQ
1403         def_bool n
1404         help
1405           This enables support for sparse irqs. This is useful in general
1406           as most CPUs have a fairly sparse array of IRQ vectors, which
1407           the irq_desc then maps directly on to. Systems with a high
1408           number of off-chip IRQs will want to treat this as
1409           experimental until they have been independently verified.
1410
1411 source "mm/Kconfig"
1412
1413 config FORCE_MAX_ZONEORDER
1414         int "Maximum zone order" if ARCH_SHMOBILE
1415         range 11 64 if ARCH_SHMOBILE
1416         default "9" if SA1111
1417         default "11"
1418         help
1419           The kernel memory allocator divides physically contiguous memory
1420           blocks into "zones", where each zone is a power of two number of
1421           pages.  This option selects the largest power of two that the kernel
1422           keeps in the memory allocator.  If you need to allocate very large
1423           blocks of physically contiguous memory, then you may need to
1424           increase this value.
1425
1426           This config option is actually maximum order plus one. For example,
1427           a value of 11 means that the largest free memory block is 2^10 pages.
1428
1429 config LEDS
1430         bool "Timer and CPU usage LEDs"
1431         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1432                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1433                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1434                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1435                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1436                    ARCH_AT91 || ARCH_DAVINCI || \
1437                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1438         help
1439           If you say Y here, the LEDs on your machine will be used
1440           to provide useful information about your current system status.
1441
1442           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1443           be able to select which LEDs are active using the options below. If
1444           you are compiling a kernel for the EBSA-110 or the LART however, the
1445           red LED will simply flash regularly to indicate that the system is
1446           still functional. It is safe to say Y here if you have a CATS
1447           system, but the driver will do nothing.
1448
1449 config LEDS_TIMER
1450         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1451                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1452                             || MACH_OMAP_PERSEUS2
1453         depends on LEDS
1454         depends on !GENERIC_CLOCKEVENTS
1455         default y if ARCH_EBSA110
1456         help
1457           If you say Y here, one of the system LEDs (the green one on the
1458           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1459           will flash regularly to indicate that the system is still
1460           operational. This is mainly useful to kernel hackers who are
1461           debugging unstable kernels.
1462
1463           The LART uses the same LED for both Timer LED and CPU usage LED
1464           functions. You may choose to use both, but the Timer LED function
1465           will overrule the CPU usage LED.
1466
1467 config LEDS_CPU
1468         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1469                         !ARCH_OMAP) \
1470                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1471                         || MACH_OMAP_PERSEUS2
1472         depends on LEDS
1473         help
1474           If you say Y here, the red LED will be used to give a good real
1475           time indication of CPU usage, by lighting whenever the idle task
1476           is not currently executing.
1477
1478           The LART uses the same LED for both Timer LED and CPU usage LED
1479           functions. You may choose to use both, but the Timer LED function
1480           will overrule the CPU usage LED.
1481
1482 config ALIGNMENT_TRAP
1483         bool
1484         depends on CPU_CP15_MMU
1485         default y if !ARCH_EBSA110
1486         select HAVE_PROC_CPU if PROC_FS
1487         help
1488           ARM processors cannot fetch/store information which is not
1489           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1490           address divisible by 4. On 32-bit ARM processors, these non-aligned
1491           fetch/store instructions will be emulated in software if you say
1492           here, which has a severe performance impact. This is necessary for
1493           correct operation of some network protocols. With an IP-only
1494           configuration it is safe to say N, otherwise say Y.
1495
1496 config UACCESS_WITH_MEMCPY
1497         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1498         depends on MMU && EXPERIMENTAL
1499         default y if CPU_FEROCEON
1500         help
1501           Implement faster copy_to_user and clear_user methods for CPU
1502           cores where a 8-word STM instruction give significantly higher
1503           memory write throughput than a sequence of individual 32bit stores.
1504
1505           A possible side effect is a slight increase in scheduling latency
1506           between threads sharing the same address space if they invoke
1507           such copy operations with large buffers.
1508
1509           However, if the CPU data cache is using a write-allocate mode,
1510           this option is unlikely to provide any performance gain.
1511
1512 config SECCOMP
1513         bool
1514         prompt "Enable seccomp to safely compute untrusted bytecode"
1515         ---help---
1516           This kernel feature is useful for number crunching applications
1517           that may need to compute untrusted bytecode during their
1518           execution. By using pipes or other transports made available to
1519           the process as file descriptors supporting the read/write
1520           syscalls, it's possible to isolate those applications in
1521           their own address space using seccomp. Once seccomp is
1522           enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1523           and the task is only allowed to execute a few safe syscalls
1524           defined by each seccomp mode.
1525
1526 config CC_STACKPROTECTOR
1527         bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1528         help
1529           This option turns on the -fstack-protector GCC feature. This
1530           feature puts, at the beginning of functions, a canary value on
1531           the stack just before the return address, and validates
1532           the value just before actually returning.  Stack based buffer
1533           overflows (that need to overwrite this return address) now also
1534           overwrite the canary, which gets detected and the attack is then
1535           neutralized via a kernel panic.
1536           This feature requires gcc version 4.2 or above.
1537
1538 config DEPRECATED_PARAM_STRUCT
1539         bool "Provide old way to pass kernel parameters"
1540         help
1541           This was deprecated in 2001 and announced to live on for 5 years.
1542           Some old boot loaders still use this way.
1543
1544 endmenu
1545
1546 menu "Boot options"
1547
1548 # Compressed boot loader in ROM.  Yes, we really want to ask about
1549 # TEXT and BSS so we preserve their values in the config files.
1550 config ZBOOT_ROM_TEXT
1551         hex "Compressed ROM boot loader base address"
1552         default "0"
1553         help
1554           The physical address at which the ROM-able zImage is to be
1555           placed in the target.  Platforms which normally make use of
1556           ROM-able zImage formats normally set this to a suitable
1557           value in their defconfig file.
1558
1559           If ZBOOT_ROM is not enabled, this has no effect.
1560
1561 config ZBOOT_ROM_BSS
1562         hex "Compressed ROM boot loader BSS address"
1563         default "0"
1564         help
1565           The base address of an area of read/write memory in the target
1566           for the ROM-able zImage which must be available while the
1567           decompressor is running. It must be large enough to hold the
1568           entire decompressed kernel plus an additional 128 KiB.
1569           Platforms which normally make use of ROM-able zImage formats
1570           normally set this to a suitable value in their defconfig file.
1571
1572           If ZBOOT_ROM is not enabled, this has no effect.
1573
1574 config ZBOOT_ROM
1575         bool "Compressed boot loader in ROM/flash"
1576         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1577         help
1578           Say Y here if you intend to execute your compressed kernel image
1579           (zImage) directly from ROM or flash.  If unsure, say N.
1580
1581 config CMDLINE
1582         string "Default kernel command string"
1583         default ""
1584         help
1585           On some architectures (EBSA110 and CATS), there is currently no way
1586           for the boot loader to pass arguments to the kernel. For these
1587           architectures, you should supply some command-line options at build
1588           time by entering them here. As a minimum, you should specify the
1589           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1590
1591 config CMDLINE_FORCE
1592         bool "Always use the default kernel command string"
1593         depends on CMDLINE != ""
1594         help
1595           Always use the default kernel command string, even if the boot
1596           loader passes other arguments to the kernel.
1597           This is useful if you cannot or don't want to change the
1598           command-line options your boot loader passes to the kernel.
1599
1600           If unsure, say N.
1601
1602 config XIP_KERNEL
1603         bool "Kernel Execute-In-Place from ROM"
1604         depends on !ZBOOT_ROM
1605         help
1606           Execute-In-Place allows the kernel to run from non-volatile storage
1607           directly addressable by the CPU, such as NOR flash. This saves RAM
1608           space since the text section of the kernel is not loaded from flash
1609           to RAM.  Read-write sections, such as the data section and stack,
1610           are still copied to RAM.  The XIP kernel is not compressed since
1611           it has to run directly from flash, so it will take more space to
1612           store it.  The flash address used to link the kernel object files,
1613           and for storing it, is configuration dependent. Therefore, if you
1614           say Y here, you must know the proper physical address where to
1615           store the kernel image depending on your own flash memory usage.
1616
1617           Also note that the make target becomes "make xipImage" rather than
1618           "make zImage" or "make Image".  The final kernel binary to put in
1619           ROM memory will be arch/arm/boot/xipImage.
1620
1621           If unsure, say N.
1622
1623 config XIP_PHYS_ADDR
1624         hex "XIP Kernel Physical Location"
1625         depends on XIP_KERNEL
1626         default "0x00080000"
1627         help
1628           This is the physical address in your flash memory the kernel will
1629           be linked for and stored to.  This address is dependent on your
1630           own flash usage.
1631
1632 config KEXEC
1633         bool "Kexec system call (EXPERIMENTAL)"
1634         depends on EXPERIMENTAL
1635         help
1636           kexec is a system call that implements the ability to shutdown your
1637           current kernel, and to start another kernel.  It is like a reboot
1638           but it is independent of the system firmware.   And like a reboot
1639           you can start any kernel with it, not just Linux.
1640
1641           It is an ongoing process to be certain the hardware in a machine
1642           is properly shutdown, so do not be surprised if this code does not
1643           initially work for you.  It may help to enable device hotplugging
1644           support.
1645
1646 config ATAGS_PROC
1647         bool "Export atags in procfs"
1648         depends on KEXEC
1649         default y
1650         help
1651           Should the atags used to boot the kernel be exported in an "atags"
1652           file in procfs. Useful with kexec.
1653
1654 config AUTO_ZRELADDR
1655         bool "Auto calculation of the decompressed kernel image address"
1656         depends on !ZBOOT_ROM && !ARCH_U300
1657         help
1658           ZRELADDR is the physical address where the decompressed kernel
1659           image will be placed. If AUTO_ZRELADDR is selected, the address
1660           will be determined at run-time by masking the current IP with
1661           0xf8000000. This assumes the zImage being placed in the first 128MB
1662           from start of memory.
1663
1664 endmenu
1665
1666 menu "CPU Power Management"
1667
1668 if ARCH_HAS_CPUFREQ
1669
1670 source "drivers/cpufreq/Kconfig"
1671
1672 config CPU_FREQ_SA1100
1673         bool
1674
1675 config CPU_FREQ_SA1110
1676         bool
1677
1678 config CPU_FREQ_INTEGRATOR
1679         tristate "CPUfreq driver for ARM Integrator CPUs"
1680         depends on ARCH_INTEGRATOR && CPU_FREQ
1681         default y
1682         help
1683           This enables the CPUfreq driver for ARM Integrator CPUs.
1684
1685           For details, take a look at <file:Documentation/cpu-freq>.
1686
1687           If in doubt, say Y.
1688
1689 config CPU_FREQ_PXA
1690         bool
1691         depends on CPU_FREQ && ARCH_PXA && PXA25x
1692         default y
1693         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1694
1695 config CPU_FREQ_S3C64XX
1696         bool "CPUfreq support for Samsung S3C64XX CPUs"
1697         depends on CPU_FREQ && CPU_S3C6410
1698
1699 config CPU_FREQ_S3C
1700         bool
1701         help
1702           Internal configuration node for common cpufreq on Samsung SoC
1703
1704 config CPU_FREQ_S3C24XX
1705         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1706         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1707         select CPU_FREQ_S3C
1708         help
1709           This enables the CPUfreq driver for the Samsung S3C24XX family
1710           of CPUs.
1711
1712           For details, take a look at <file:Documentation/cpu-freq>.
1713
1714           If in doubt, say N.
1715
1716 config CPU_FREQ_S3C24XX_PLL
1717         bool "Support CPUfreq changing of PLL frequency"
1718         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1719         help
1720           Compile in support for changing the PLL frequency from the
1721           S3C24XX series CPUfreq driver. The PLL takes time to settle
1722           after a frequency change, so by default it is not enabled.
1723
1724           This also means that the PLL tables for the selected CPU(s) will
1725           be built which may increase the size of the kernel image.
1726
1727 config CPU_FREQ_S3C24XX_DEBUG
1728         bool "Debug CPUfreq Samsung driver core"
1729         depends on CPU_FREQ_S3C24XX
1730         help
1731           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1732
1733 config CPU_FREQ_S3C24XX_IODEBUG
1734         bool "Debug CPUfreq Samsung driver IO timing"
1735         depends on CPU_FREQ_S3C24XX
1736         help
1737           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1738
1739 config CPU_FREQ_S3C24XX_DEBUGFS
1740         bool "Export debugfs for CPUFreq"
1741         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1742         help
1743           Export status information via debugfs.
1744
1745 endif
1746
1747 source "drivers/cpuidle/Kconfig"
1748
1749 endmenu
1750
1751 menu "Floating point emulation"
1752
1753 comment "At least one emulation must be selected"
1754
1755 config FPE_NWFPE
1756         bool "NWFPE math emulation"
1757         depends on !AEABI || OABI_COMPAT
1758         ---help---
1759           Say Y to include the NWFPE floating point emulator in the kernel.
1760           This is necessary to run most binaries. Linux does not currently
1761           support floating point hardware so you need to say Y here even if
1762           your machine has an FPA or floating point co-processor podule.
1763
1764           You may say N here if you are going to load the Acorn FPEmulator
1765           early in the bootup.
1766
1767 config FPE_NWFPE_XP
1768         bool "Support extended precision"
1769         depends on FPE_NWFPE
1770         help
1771           Say Y to include 80-bit support in the kernel floating-point
1772           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1773           Note that gcc does not generate 80-bit operations by default,
1774           so in most cases this option only enlarges the size of the
1775           floating point emulator without any good reason.
1776
1777           You almost surely want to say N here.
1778
1779 config FPE_FASTFPE
1780         bool "FastFPE math emulation (EXPERIMENTAL)"
1781         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1782         ---help---
1783           Say Y here to include the FAST floating point emulator in the kernel.
1784           This is an experimental much faster emulator which now also has full
1785           precision for the mantissa.  It does not support any exceptions.
1786           It is very simple, and approximately 3-6 times faster than NWFPE.
1787
1788           It should be sufficient for most programs.  It may be not suitable
1789           for scientific calculations, but you have to check this for yourself.
1790           If you do not feel you need a faster FP emulation you should better
1791           choose NWFPE.
1792
1793 config VFP
1794         bool "VFP-format floating point maths"
1795         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1796         help
1797           Say Y to include VFP support code in the kernel. This is needed
1798           if your hardware includes a VFP unit.
1799
1800           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1801           release notes and additional status information.
1802
1803           Say N if your target does not have VFP hardware.
1804
1805 config VFPv3
1806         bool
1807         depends on VFP
1808         default y if CPU_V7
1809
1810 config NEON
1811         bool "Advanced SIMD (NEON) Extension support"
1812         depends on VFPv3 && CPU_V7
1813         help
1814           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1815           Extension.
1816
1817 endmenu
1818
1819 menu "Userspace binary formats"
1820
1821 source "fs/Kconfig.binfmt"
1822
1823 config ARTHUR
1824         tristate "RISC OS personality"
1825         depends on !AEABI
1826         help
1827           Say Y here to include the kernel code necessary if you want to run
1828           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1829           experimental; if this sounds frightening, say N and sleep in peace.
1830           You can also say M here to compile this support as a module (which
1831           will be called arthur).
1832
1833 endmenu
1834
1835 menu "Power management options"
1836
1837 source "kernel/power/Kconfig"
1838
1839 config ARCH_SUSPEND_POSSIBLE
1840         def_bool y
1841
1842 endmenu
1843
1844 source "net/Kconfig"
1845
1846 source "drivers/Kconfig"
1847
1848 source "fs/Kconfig"
1849
1850 source "arch/arm/Kconfig.debug"
1851
1852 source "security/Kconfig"
1853
1854 source "crypto/Kconfig"
1855
1856 source "lib/Kconfig"