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 RTC_LIB
  14         select SYS_SUPPORTS_APM_EMULATION
  15         select GENERIC_ATOMIC64 if (!CPU_32v6K)
  16         select HAVE_OPROFILE
  17         select HAVE_ARCH_KGDB
  18         select HAVE_KPROBES if (!XIP_KERNEL)
  19         select HAVE_KRETPROBES if (HAVE_KPROBES)
  20         select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  21         select HAVE_GENERIC_DMA_COHERENT
  22         select HAVE_KERNEL_GZIP
  23         select HAVE_KERNEL_LZO
  24         select HAVE_PERF_EVENTS
  25         select PERF_USE_VMALLOC
  26         help
  27           The ARM series is a line of low-power-consumption RISC chip designs
  28           licensed by ARM Ltd and targeted at embedded applications and
  29           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  30           manufactured, but legacy ARM-based PC hardware remains popular in
  31           Europe.  There is an ARM Linux project with a web page at
  32           <http://www.arm.linux.org.uk/>.
  33
  34 config HAVE_PWM
  35         bool
  36
  37 config SYS_SUPPORTS_APM_EMULATION
  38         bool
  39
  40 config GENERIC_GPIO
  41         bool
  42
  43 config GENERIC_TIME
  44         bool
  45
  46 config GENERIC_CLOCKEVENTS
  47         bool
  48
  49 config GENERIC_CLOCKEVENTS_BROADCAST
  50         bool
  51         depends on GENERIC_CLOCKEVENTS
  52         default y if SMP && !LOCAL_TIMERS
  53
  54 config HAVE_TCM
  55         bool
  56         select GENERIC_ALLOCATOR
  57
  58 config HAVE_PROC_CPU
  59         bool
  60
  61 config NO_IOPORT
  62         bool
  63
  64 config EISA
  65         bool
  66         ---help---
  67           The Extended Industry Standard Architecture (EISA) bus was
  68           developed as an open alternative to the IBM MicroChannel bus.
  69
  70           The EISA bus provided some of the features of the IBM MicroChannel
  71           bus while maintaining backward compatibility with cards made for
  72           the older ISA bus.  The EISA bus saw limited use between 1988 and
  73           1995 when it was made obsolete by the PCI bus.
  74
  75           Say Y here if you are building a kernel for an EISA-based machine.
  76
  77           Otherwise, say N.
  78
  79 config SBUS
  80         bool
  81
  82 config MCA
  83         bool
  84         help
  85           MicroChannel Architecture is found in some IBM PS/2 machines and
  86           laptops.  It is a bus system similar to PCI or ISA. See
  87           <file:Documentation/mca.txt> (and especially the web page given
  88           there) before attempting to build an MCA bus kernel.
  89
  90 config GENERIC_HARDIRQS
  91         bool
  92         default y
  93
  94 config STACKTRACE_SUPPORT
  95         bool
  96         default y
  97
  98 config HAVE_LATENCYTOP_SUPPORT
  99         bool
 100         depends on !SMP
 101         default y
 102
 103 config LOCKDEP_SUPPORT
 104         bool
 105         default y
 106
 107 config TRACE_IRQFLAGS_SUPPORT
 108         bool
 109         default y
 110
 111 config HARDIRQS_SW_RESEND
 112         bool
 113         default y
 114
 115 config GENERIC_IRQ_PROBE
 116         bool
 117         default y
 118
 119 config GENERIC_LOCKBREAK
 120         bool
 121         default y
 122         depends on SMP && PREEMPT
 123
 124 config RWSEM_GENERIC_SPINLOCK
 125         bool
 126         default y
 127
 128 config RWSEM_XCHGADD_ALGORITHM
 129         bool
 130
 131 config ARCH_HAS_ILOG2_U32
 132         bool
 133
 134 config ARCH_HAS_ILOG2_U64
 135         bool
 136
 137 config ARCH_HAS_CPUFREQ
 138         bool
 139         help
 140           Internal node to signify that the ARCH has CPUFREQ support
 141           and that the relevant menu configurations are displayed for
 142           it.
 143
 144 config GENERIC_HWEIGHT
 145         bool
 146         default y
 147
 148 config GENERIC_CALIBRATE_DELAY
 149         bool
 150         default y
 151
 152 config ARCH_MAY_HAVE_PC_FDC
 153         bool
 154
 155 config ZONE_DMA
 156         bool
 157
 158 config NEED_DMA_MAP_STATE
 159        def_bool y
 160
 161 config GENERIC_ISA_DMA
 162         bool
 163
 164 config FIQ
 165         bool
 166
 167 config ARCH_MTD_XIP
 168         bool
 169
 170 config GENERIC_HARDIRQS_NO__DO_IRQ
 171         def_bool y
 172
 173 config ARM_L1_CACHE_SHIFT_6
 174         bool
 175         help
 176           Setting ARM L1 cache line size to 64 Bytes.
 177
 178 if OPROFILE
 179
 180 config OPROFILE_ARMV6
 181         def_bool y
 182         depends on CPU_V6 && !SMP
 183         select OPROFILE_ARM11_CORE
 184
 185 config OPROFILE_MPCORE
 186         def_bool y
 187         depends on CPU_V6 && SMP
 188         select OPROFILE_ARM11_CORE
 189
 190 config OPROFILE_ARM11_CORE
 191         bool
 192
 193 config OPROFILE_ARMV7
 194         def_bool y
 195         depends on CPU_V7 && !SMP
 196         bool
 197
 198 endif
 199
 200 config VECTORS_BASE
 201         hex
 202         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 203         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 204         default 0x00000000
 205         help
 206           The base address of exception vectors.
 207
 208 source "init/Kconfig"
 209
 210 source "kernel/Kconfig.freezer"
 211
 212 menu "System Type"
 213
 214 config MMU
 215         bool "MMU-based Paged Memory Management Support"
 216         default y
 217         help
 218           Select if you want MMU-based virtualised addressing space
 219           support by paged memory management. If unsure, say 'Y'.
 220
 221 #
 222 # The "ARM system type" choice list is ordered alphabetically by option
 223 # text.  Please add new entries in the option alphabetic order.
 224 #
 225 choice
 226         prompt "ARM system type"
 227         default ARCH_VERSATILE
 228
 229 config ARCH_AAEC2000
 230         bool "Agilent AAEC-2000 based"
 231         select CPU_ARM920T
 232         select ARM_AMBA
 233         select HAVE_CLK
 234         help
 235           This enables support for systems based on the Agilent AAEC-2000
 236
 237 config ARCH_INTEGRATOR
 238         bool "ARM Ltd. Integrator family"
 239         select ARM_AMBA
 240         select ARCH_HAS_CPUFREQ
 241         select HAVE_CLK
 242         select COMMON_CLKDEV
 243         select ICST525
 244         help
 245           Support for ARM's Integrator platform.
 246
 247 config ARCH_REALVIEW
 248         bool "ARM Ltd. RealView family"
 249         select ARM_AMBA
 250         select HAVE_CLK
 251         select COMMON_CLKDEV
 252         select ICST307
 253         select GENERIC_TIME
 254         select GENERIC_CLOCKEVENTS
 255         select ARCH_WANT_OPTIONAL_GPIOLIB
 256         select GPIO_PL061 if GPIOLIB
 257         help
 258           This enables support for ARM Ltd RealView boards.
 259
 260 config ARCH_VERSATILE
 261         bool "ARM Ltd. Versatile family"
 262         select ARM_AMBA
 263         select ARM_VIC
 264         select HAVE_CLK
 265         select COMMON_CLKDEV
 266         select ICST307
 267         select GENERIC_TIME
 268         select GENERIC_CLOCKEVENTS
 269         select ARCH_WANT_OPTIONAL_GPIOLIB
 270         help
 271           This enables support for ARM Ltd Versatile board.
 272
 273 config ARCH_AT91
 274         bool "Atmel AT91"
 275         select GENERIC_GPIO
 276         select ARCH_REQUIRE_GPIOLIB
 277         select HAVE_CLK
 278         help
 279           This enables support for systems based on the Atmel AT91RM9200,
 280           AT91SAM9 and AT91CAP9 processors.
 281
 282 config ARCH_BCMRING
 283         bool "Broadcom BCMRING"
 284         depends on MMU
 285         select CPU_V6
 286         select ARM_AMBA
 287         select COMMON_CLKDEV
 288         select GENERIC_TIME
 289         select GENERIC_CLOCKEVENTS
 290         select ARCH_WANT_OPTIONAL_GPIOLIB
 291         help
 292           Support for Broadcom's BCMRing platform.
 293
 294 config ARCH_CLPS711X
 295         bool "Cirrus Logic CLPS711x/EP721x-based"
 296         select CPU_ARM720T
 297         help
 298           Support for Cirrus Logic 711x/721x based boards.
 299
 300 config ARCH_GEMINI
 301         bool "Cortina Systems Gemini"
 302         select CPU_FA526
 303         select GENERIC_GPIO
 304         select ARCH_REQUIRE_GPIOLIB
 305         help
 306           Support for the Cortina Systems Gemini family SoCs
 307
 308 config ARCH_EBSA110
 309         bool "EBSA-110"
 310         select CPU_SA110
 311         select ISA
 312         select NO_IOPORT
 313         help
 314           This is an evaluation board for the StrongARM processor available
 315           from Digital. It has limited hardware on-board, including an
 316           Ethernet interface, two PCMCIA sockets, two serial ports and a
 317           parallel port.
 318
 319 config ARCH_EP93XX
 320         bool "EP93xx-based"
 321         select CPU_ARM920T
 322         select ARM_AMBA
 323         select ARM_VIC
 324         select GENERIC_GPIO
 325         select HAVE_CLK
 326         select COMMON_CLKDEV
 327         select ARCH_REQUIRE_GPIOLIB
 328         select ARCH_HAS_HOLES_MEMORYMODEL
 329         help
 330           This enables support for the Cirrus EP93xx series of CPUs.
 331
 332 config ARCH_FOOTBRIDGE
 333         bool "FootBridge"
 334         select CPU_SA110
 335         select FOOTBRIDGE
 336         help
 337           Support for systems based on the DC21285 companion chip
 338           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 339
 340 config ARCH_MXC
 341         bool "Freescale MXC/iMX-based"
 342         select GENERIC_TIME
 343         select GENERIC_CLOCKEVENTS
 344         select ARCH_REQUIRE_GPIOLIB
 345         select HAVE_CLK
 346         select COMMON_CLKDEV
 347         help
 348           Support for Freescale MXC/iMX-based family of processors
 349
 350 config ARCH_STMP3XXX
 351         bool "Freescale STMP3xxx"
 352         select CPU_ARM926T
 353         select HAVE_CLK
 354         select COMMON_CLKDEV
 355         select ARCH_REQUIRE_GPIOLIB
 356         select GENERIC_TIME
 357         select GENERIC_CLOCKEVENTS
 358         select GENERIC_GPIO
 359         select USB_ARCH_HAS_EHCI
 360         help
 361           Support for systems based on the Freescale 3xxx CPUs.
 362
 363 config ARCH_NETX
 364         bool "Hilscher NetX based"
 365         select CPU_ARM926T
 366         select ARM_VIC
 367         select GENERIC_CLOCKEVENTS
 368         select GENERIC_TIME
 369         help
 370           This enables support for systems based on the Hilscher NetX Soc
 371
 372 config ARCH_H720X
 373         bool "Hynix HMS720x-based"
 374         select CPU_ARM720T
 375         select ISA_DMA_API
 376         help
 377           This enables support for systems based on the Hynix HMS720x
 378
 379 config ARCH_IOP13XX
 380         bool "IOP13xx-based"
 381         depends on MMU
 382         select CPU_XSC3
 383         select PLAT_IOP
 384         select PCI
 385         select ARCH_SUPPORTS_MSI
 386         select VMSPLIT_1G
 387         help
 388           Support for Intel's IOP13XX (XScale) family of processors.
 389
 390 config ARCH_IOP32X
 391         bool "IOP32x-based"
 392         depends on MMU
 393         select CPU_XSCALE
 394         select PLAT_IOP
 395         select PCI
 396         select GENERIC_GPIO
 397         select ARCH_REQUIRE_GPIOLIB
 398         help
 399           Support for Intel's 80219 and IOP32X (XScale) family of
 400           processors.
 401
 402 config ARCH_IOP33X
 403         bool "IOP33x-based"
 404         depends on MMU
 405         select CPU_XSCALE
 406         select PLAT_IOP
 407         select PCI
 408         select GENERIC_GPIO
 409         select ARCH_REQUIRE_GPIOLIB
 410         help
 411           Support for Intel's IOP33X (XScale) family of processors.
 412
 413 config ARCH_IXP23XX
 414         bool "IXP23XX-based"
 415         depends on MMU
 416         select CPU_XSC3
 417         select PCI
 418         help
 419           Support for Intel's IXP23xx (XScale) family of processors.
 420
 421 config ARCH_IXP2000
 422         bool "IXP2400/2800-based"
 423         depends on MMU
 424         select CPU_XSCALE
 425         select PCI
 426         help
 427           Support for Intel's IXP2400/2800 (XScale) family of processors.
 428
 429 config ARCH_IXP4XX
 430         bool "IXP4xx-based"
 431         depends on MMU
 432         select CPU_XSCALE
 433         select GENERIC_GPIO
 434         select GENERIC_TIME
 435         select GENERIC_CLOCKEVENTS
 436         select DMABOUNCE if PCI
 437         help
 438           Support for Intel's IXP4XX (XScale) family of processors.
 439
 440 config ARCH_L7200
 441         bool "LinkUp-L7200"
 442         select CPU_ARM720T
 443         select FIQ
 444         help
 445           Say Y here if you intend to run this kernel on a LinkUp Systems
 446           L7200 Software Development Board which uses an ARM720T processor.
 447           Information on this board can be obtained at:
 448
 449           <http://www.linkupsys.com/>
 450
 451           If you have any questions or comments about the Linux kernel port
 452           to this board, send e-mail to <sjhill@cotw.com>.
 453
 454 config ARCH_DOVE
 455         bool "Marvell Dove"
 456         select PCI
 457         select GENERIC_GPIO
 458         select ARCH_REQUIRE_GPIOLIB
 459         select GENERIC_TIME
 460         select GENERIC_CLOCKEVENTS
 461         select PLAT_ORION
 462         help
 463           Support for the Marvell Dove SoC 88AP510
 464
 465 config ARCH_KIRKWOOD
 466         bool "Marvell Kirkwood"
 467         select CPU_FEROCEON
 468         select PCI
 469         select GENERIC_GPIO
 470         select ARCH_REQUIRE_GPIOLIB
 471         select GENERIC_TIME
 472         select GENERIC_CLOCKEVENTS
 473         select PLAT_ORION
 474         help
 475           Support for the following Marvell Kirkwood series SoCs:
 476           88F6180, 88F6192 and 88F6281.
 477
 478 config ARCH_LOKI
 479         bool "Marvell Loki (88RC8480)"
 480         select CPU_FEROCEON
 481         select GENERIC_TIME
 482         select GENERIC_CLOCKEVENTS
 483         select PLAT_ORION
 484         help
 485           Support for the Marvell Loki (88RC8480) SoC.
 486
 487 config ARCH_MV78XX0
 488         bool "Marvell MV78xx0"
 489         select CPU_FEROCEON
 490         select PCI
 491         select GENERIC_GPIO
 492         select ARCH_REQUIRE_GPIOLIB
 493         select GENERIC_TIME
 494         select GENERIC_CLOCKEVENTS
 495         select PLAT_ORION
 496         help
 497           Support for the following Marvell MV78xx0 series SoCs:
 498           MV781x0, MV782x0.
 499
 500 config ARCH_ORION5X
 501         bool "Marvell Orion"
 502         depends on MMU
 503         select CPU_FEROCEON
 504         select PCI
 505         select GENERIC_GPIO
 506         select ARCH_REQUIRE_GPIOLIB
 507         select GENERIC_TIME
 508         select GENERIC_CLOCKEVENTS
 509         select PLAT_ORION
 510         help
 511           Support for the following Marvell Orion 5x series SoCs:
 512           Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
 513           Orion-2 (5281), Orion-1-90 (6183).
 514
 515 config ARCH_MMP
 516         bool "Marvell PXA168/910/MMP2"
 517         depends on MMU
 518         select GENERIC_GPIO
 519         select ARCH_REQUIRE_GPIOLIB
 520         select HAVE_CLK
 521         select COMMON_CLKDEV
 522         select GENERIC_TIME
 523         select GENERIC_CLOCKEVENTS
 524         select TICK_ONESHOT
 525         select PLAT_PXA
 526         help
 527           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 528
 529 config ARCH_KS8695
 530         bool "Micrel/Kendin KS8695"
 531         select CPU_ARM922T
 532         select GENERIC_GPIO
 533         select ARCH_REQUIRE_GPIOLIB
 534         help
 535           Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
 536           System-on-Chip devices.
 537
 538 config ARCH_NS9XXX
 539         bool "NetSilicon NS9xxx"
 540         select CPU_ARM926T
 541         select GENERIC_GPIO
 542         select GENERIC_TIME
 543         select GENERIC_CLOCKEVENTS
 544         select HAVE_CLK
 545         help
 546           Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
 547           System.
 548
 549           <http://www.digi.com/products/microprocessors/index.jsp>
 550
 551 config ARCH_W90X900
 552         bool "Nuvoton W90X900 CPU"
 553         select CPU_ARM926T
 554         select ARCH_REQUIRE_GPIOLIB
 555         select GENERIC_GPIO
 556         select HAVE_CLK
 557         select COMMON_CLKDEV
 558         select GENERIC_TIME
 559         select GENERIC_CLOCKEVENTS
 560         help
 561           Support for Nuvoton (Winbond logic dept.) ARM9 processor,
 562           At present, the w90x900 has been renamed nuc900, regarding
 563           the ARM series product line, you can login the following
 564           link address to know more.
 565
 566           <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 567                 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 568
 569 config ARCH_NUC93X
 570         bool "Nuvoton NUC93X CPU"
 571         select CPU_ARM926T
 572         select HAVE_CLK
 573         select COMMON_CLKDEV
 574         help
 575           Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
 576           low-power and high performance MPEG-4/JPEG multimedia controller chip.
 577
 578 config ARCH_PNX4008
 579         bool "Philips Nexperia PNX4008 Mobile"
 580         select CPU_ARM926T
 581         select HAVE_CLK
 582         select COMMON_CLKDEV
 583         help
 584           This enables support for Philips PNX4008 mobile platform.
 585
 586 config ARCH_PXA
 587         bool "PXA2xx/PXA3xx-based"
 588         depends on MMU
 589         select ARCH_MTD_XIP
 590         select ARCH_HAS_CPUFREQ
 591         select GENERIC_GPIO
 592         select HAVE_CLK
 593         select COMMON_CLKDEV
 594         select ARCH_REQUIRE_GPIOLIB
 595         select GENERIC_TIME
 596         select GENERIC_CLOCKEVENTS
 597         select TICK_ONESHOT
 598         select PLAT_PXA
 599         help
 600           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 601
 602 config ARCH_MSM
 603         bool "Qualcomm MSM"
 604         select CPU_V6
 605         select GENERIC_TIME
 606         select GENERIC_CLOCKEVENTS
 607         help
 608           Support for Qualcomm MSM7K based systems.  This runs on the ARM11
 609           apps processor of the MSM7K and depends on a shared memory
 610           interface to the ARM9 modem processor which runs the baseband stack
 611           and controls some vital subsystems (clock and power control, etc).
 612
 613 config ARCH_SHMOBILE
 614         bool "Renesas SH-Mobile"
 615         help
 616           Support for Renesas's SH-Mobile ARM platforms
 617
 618 config ARCH_RPC
 619         bool "RiscPC"
 620         select ARCH_ACORN
 621         select FIQ
 622         select TIMER_ACORN
 623         select ARCH_MAY_HAVE_PC_FDC
 624         select HAVE_PATA_PLATFORM
 625         select ISA_DMA_API
 626         select NO_IOPORT
 627         select ARCH_SPARSEMEM_ENABLE
 628         help
 629           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 630           CD-ROM interface, serial and parallel port, and the floppy drive.
 631
 632 config ARCH_SA1100
 633         bool "SA1100-based"
 634         select CPU_SA1100
 635         select ISA
 636         select ARCH_SPARSEMEM_ENABLE
 637         select ARCH_MTD_XIP
 638         select ARCH_HAS_CPUFREQ
 639         select CPU_FREQ
 640         select GENERIC_GPIO
 641         select GENERIC_TIME
 642         select GENERIC_CLOCKEVENTS
 643         select HAVE_CLK
 644         select TICK_ONESHOT
 645         select ARCH_REQUIRE_GPIOLIB
 646         help
 647           Support for StrongARM 11x0 based boards.
 648
 649 config ARCH_S3C2410
 650         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
 651         select GENERIC_GPIO
 652         select ARCH_HAS_CPUFREQ
 653         select HAVE_CLK
 654         help
 655           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 656           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 657           the Samsung SMDK2410 development board (and derivatives).
 658
 659           Note, the S3C2416 and the S3C2450 are so close that they even share
 660           the same SoC ID code. This means that there is no seperate machine
 661           directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
 662
 663 config ARCH_S3C64XX
 664         bool "Samsung S3C64XX"
 665         select PLAT_SAMSUNG
 666         select CPU_V6
 667         select GENERIC_GPIO
 668         select ARM_VIC
 669         select HAVE_CLK
 670         select NO_IOPORT
 671         select ARCH_HAS_CPUFREQ
 672         select ARCH_REQUIRE_GPIOLIB
 673         select SAMSUNG_CLKSRC
 674         select SAMSUNG_IRQ_VIC_TIMER
 675         select SAMSUNG_IRQ_UART
 676         select S3C_GPIO_TRACK
 677         select S3C_GPIO_PULL_UPDOWN
 678         select S3C_GPIO_CFG_S3C24XX
 679         select S3C_GPIO_CFG_S3C64XX
 680         select S3C_DEV_NAND
 681         select USB_ARCH_HAS_OHCI
 682         select SAMSUNG_GPIOLIB_4BIT
 683         help
 684           Samsung S3C64XX series based systems
 685
 686 config ARCH_S5P6440
 687         bool "Samsung S5P6440"
 688         select CPU_V6
 689         select GENERIC_GPIO
 690         select HAVE_CLK
 691         help
 692           Samsung S5P6440 CPU based systems
 693
 694 config ARCH_S5P6442
 695         bool "Samsung S5P6442"
 696         select CPU_V6
 697         select GENERIC_GPIO
 698         select HAVE_CLK
 699         help
 700           Samsung S5P6442 CPU based systems
 701
 702 config ARCH_S5PC1XX
 703         bool "Samsung S5PC1XX"
 704         select GENERIC_GPIO
 705         select HAVE_CLK
 706         select CPU_V7
 707         select ARM_L1_CACHE_SHIFT_6
 708         help
 709           Samsung S5PC1XX series based systems
 710
 711 config ARCH_S5PV210
 712         bool "Samsung S5PV210/S5PC110"
 713         select CPU_V7
 714         select GENERIC_GPIO
 715         select HAVE_CLK
 716         select ARM_L1_CACHE_SHIFT_6
 717         help
 718           Samsung S5PV210/S5PC110 series based systems
 719
 720 config ARCH_SHARK
 721         bool "Shark"
 722         select CPU_SA110
 723         select ISA
 724         select ISA_DMA
 725         select ZONE_DMA
 726         select PCI
 727         help
 728           Support for the StrongARM based Digital DNARD machine, also known
 729           as "Shark" (<http://www.shark-linux.de/shark.html>).
 730
 731 config ARCH_LH7A40X
 732         bool "Sharp LH7A40X"
 733         select CPU_ARM922T
 734         select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 735         select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 736         help
 737           Say Y here for systems based on one of the Sharp LH7A40X
 738           System on a Chip processors.  These CPUs include an ARM922T
 739           core with a wide array of integrated devices for
 740           hand-held and low-power applications.
 741
 742 config ARCH_U300
 743         bool "ST-Ericsson U300 Series"
 744         depends on MMU
 745         select CPU_ARM926T
 746         select HAVE_TCM
 747         select ARM_AMBA
 748         select ARM_VIC
 749         select GENERIC_TIME
 750         select GENERIC_CLOCKEVENTS
 751         select HAVE_CLK
 752         select COMMON_CLKDEV
 753         select GENERIC_GPIO
 754         help
 755           Support for ST-Ericsson U300 series mobile platforms.
 756
 757 config ARCH_U8500
 758         bool "ST-Ericsson U8500 Series"
 759         select CPU_V7
 760         select ARM_AMBA
 761         select GENERIC_TIME
 762         select GENERIC_CLOCKEVENTS
 763         select COMMON_CLKDEV
 764         help
 765           Support for ST-Ericsson's Ux500 architecture
 766
 767 config ARCH_NOMADIK
 768         bool "STMicroelectronics Nomadik"
 769         select ARM_AMBA
 770         select ARM_VIC
 771         select CPU_ARM926T
 772         select HAVE_CLK
 773         select COMMON_CLKDEV
 774         select GENERIC_TIME
 775         select GENERIC_CLOCKEVENTS
 776         select GENERIC_GPIO
 777         select ARCH_REQUIRE_GPIOLIB
 778         help
 779           Support for the Nomadik platform by ST-Ericsson
 780
 781 config ARCH_DAVINCI
 782         bool "TI DaVinci"
 783         select CPU_ARM926T
 784         select GENERIC_TIME
 785         select GENERIC_CLOCKEVENTS
 786         select GENERIC_GPIO
 787         select ARCH_REQUIRE_GPIOLIB
 788         select HAVE_CLK
 789         select ZONE_DMA
 790         select HAVE_IDE
 791         select COMMON_CLKDEV
 792         select GENERIC_ALLOCATOR
 793         select ARCH_HAS_HOLES_MEMORYMODEL
 794         help
 795           Support for TI's DaVinci platform.
 796
 797 config ARCH_OMAP
 798         bool "TI OMAP"
 799         select GENERIC_GPIO
 800         select HAVE_CLK
 801         select ARCH_REQUIRE_GPIOLIB
 802         select ARCH_HAS_CPUFREQ
 803         select GENERIC_TIME
 804         select GENERIC_CLOCKEVENTS
 805         select ARCH_HAS_HOLES_MEMORYMODEL
 806         help
 807           Support for TI's OMAP platform (OMAP1 and OMAP2).
 808
 809 endchoice
 810
 811 #
 812 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 813 # Kconfigs may be included either alphabetically (according to the
 814 # plat- suffix) or along side the corresponding mach-* source.
 815 #
 816 source "arch/arm/mach-aaec2000/Kconfig"
 817
 818 source "arch/arm/mach-at91/Kconfig"
 819
 820 source "arch/arm/mach-bcmring/Kconfig"
 821
 822 source "arch/arm/mach-clps711x/Kconfig"
 823
 824 source "arch/arm/mach-davinci/Kconfig"
 825
 826 source "arch/arm/mach-dove/Kconfig"
 827
 828 source "arch/arm/mach-ep93xx/Kconfig"
 829
 830 source "arch/arm/mach-footbridge/Kconfig"
 831
 832 source "arch/arm/mach-gemini/Kconfig"
 833
 834 source "arch/arm/mach-h720x/Kconfig"
 835
 836 source "arch/arm/mach-integrator/Kconfig"
 837
 838 source "arch/arm/mach-iop32x/Kconfig"
 839
 840 source "arch/arm/mach-iop33x/Kconfig"
 841
 842 source "arch/arm/mach-iop13xx/Kconfig"
 843
 844 source "arch/arm/mach-ixp4xx/Kconfig"
 845
 846 source "arch/arm/mach-ixp2000/Kconfig"
 847
 848 source "arch/arm/mach-ixp23xx/Kconfig"
 849
 850 source "arch/arm/mach-kirkwood/Kconfig"
 851
 852 source "arch/arm/mach-ks8695/Kconfig"
 853
 854 source "arch/arm/mach-lh7a40x/Kconfig"
 855
 856 source "arch/arm/mach-loki/Kconfig"
 857
 858 source "arch/arm/mach-msm/Kconfig"
 859
 860 source "arch/arm/mach-mv78xx0/Kconfig"
 861
 862 source "arch/arm/plat-mxc/Kconfig"
 863
 864 source "arch/arm/mach-netx/Kconfig"
 865
 866 source "arch/arm/mach-nomadik/Kconfig"
 867 source "arch/arm/plat-nomadik/Kconfig"
 868
 869 source "arch/arm/mach-ns9xxx/Kconfig"
 870
 871 source "arch/arm/mach-nuc93x/Kconfig"
 872
 873 source "arch/arm/plat-omap/Kconfig"
 874
 875 source "arch/arm/mach-omap1/Kconfig"
 876
 877 source "arch/arm/mach-omap2/Kconfig"
 878
 879 source "arch/arm/mach-orion5x/Kconfig"
 880
 881 source "arch/arm/mach-pxa/Kconfig"
 882 source "arch/arm/plat-pxa/Kconfig"
 883
 884 source "arch/arm/mach-mmp/Kconfig"
 885
 886 source "arch/arm/mach-realview/Kconfig"
 887
 888 source "arch/arm/mach-sa1100/Kconfig"
 889
 890 source "arch/arm/plat-samsung/Kconfig"
 891 source "arch/arm/plat-s3c24xx/Kconfig"
 892 source "arch/arm/plat-s5p/Kconfig"
 893 source "arch/arm/plat-s5pc1xx/Kconfig"
 894
 895 if ARCH_S3C2410
 896 source "arch/arm/mach-s3c2400/Kconfig"
 897 source "arch/arm/mach-s3c2410/Kconfig"
 898 source "arch/arm/mach-s3c2412/Kconfig"
 899 source "arch/arm/mach-s3c2416/Kconfig"
 900 source "arch/arm/mach-s3c2440/Kconfig"
 901 source "arch/arm/mach-s3c2443/Kconfig"
 902 endif
 903
 904 if ARCH_S3C64XX
 905 source "arch/arm/mach-s3c64xx/Kconfig"
 906 endif
 907
 908 source "arch/arm/mach-s5p6440/Kconfig"
 909
 910 source "arch/arm/mach-s5p6442/Kconfig"
 911
 912 if ARCH_S5PC1XX
 913 source "arch/arm/mach-s5pc100/Kconfig"
 914 endif
 915
 916 source "arch/arm/mach-s5pv210/Kconfig"
 917
 918 source "arch/arm/mach-shmobile/Kconfig"
 919
 920 source "arch/arm/plat-stmp3xxx/Kconfig"
 921
 922 source "arch/arm/mach-u300/Kconfig"
 923
 924 source "arch/arm/mach-ux500/Kconfig"
 925
 926 source "arch/arm/mach-versatile/Kconfig"
 927
 928 source "arch/arm/mach-w90x900/Kconfig"
 929
 930 # Definitions to make life easier
 931 config ARCH_ACORN
 932         bool
 933
 934 config PLAT_IOP
 935         bool
 936         select GENERIC_CLOCKEVENTS
 937         select GENERIC_TIME
 938
 939 config PLAT_ORION
 940         bool
 941
 942 config PLAT_PXA
 943         bool
 944
 945 source arch/arm/mm/Kconfig
 946
 947 config IWMMXT
 948         bool "Enable iWMMXt support"
 949         depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
 950         default y if PXA27x || PXA3xx || ARCH_MMP
 951         help
 952           Enable support for iWMMXt context switching at run time if
 953           running on a CPU that supports it.
 954
 955 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 956 config XSCALE_PMU
 957         bool
 958         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 959         default y
 960
 961 config CPU_HAS_PMU
 962         depends on CPU_V6 || CPU_V7 || XSCALE_PMU
 963         default y
 964         bool
 965
 966 if !MMU
 967 source "arch/arm/Kconfig-nommu"
 968 endif
 969
 970 config ARM_ERRATA_411920
 971         bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
 972         depends on CPU_V6 && !SMP
 973         help
 974           Invalidation of the Instruction Cache operation can
 975           fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
 976           It does not affect the MPCore. This option enables the ARM Ltd.
 977           recommended workaround.
 978
 979 config ARM_ERRATA_430973
 980         bool "ARM errata: Stale prediction on replaced interworking branch"
 981         depends on CPU_V7
 982         help
 983           This option enables the workaround for the 430973 Cortex-A8
 984           (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
 985           interworking branch is replaced with another code sequence at the
 986           same virtual address, whether due to self-modifying code or virtual
 987           to physical address re-mapping, Cortex-A8 does not recover from the
 988           stale interworking branch prediction. This results in Cortex-A8
 989           executing the new code sequence in the incorrect ARM or Thumb state.
 990           The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
 991           and also flushes the branch target cache at every context switch.
 992           Note that setting specific bits in the ACTLR register may not be
 993           available in non-secure mode.
 994
 995 config ARM_ERRATA_458693
 996         bool "ARM errata: Processor deadlock when a false hazard is created"
 997         depends on CPU_V7
 998         help
 999           This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1000           erratum. For very specific sequences of memory operations, it is
1001           possible for a hazard condition intended for a cache line to instead
1002           be incorrectly associated with a different cache line. This false
1003           hazard might then cause a processor deadlock. The workaround enables
1004           the L1 caching of the NEON accesses and disables the PLD instruction
1005           in the ACTLR register. Note that setting specific bits in the ACTLR
1006           register may not be available in non-secure mode.
1007
1008 config ARM_ERRATA_460075
1009         bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1010         depends on CPU_V7
1011         help
1012           This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1013           erratum. Any asynchronous access to the L2 cache may encounter a
1014           situation in which recent store transactions to the L2 cache are lost
1015           and overwritten with stale memory contents from external memory. The
1016           workaround disables the write-allocate mode for the L2 cache via the
1017           ACTLR register. Note that setting specific bits in the ACTLR register
1018           may not be available in non-secure mode.
1019
1020 config PL310_ERRATA_588369
1021         bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1022         depends on CACHE_L2X0 && ARCH_OMAP4
1023         help
1024            The PL310 L2 cache controller implements three types of Clean &
1025            Invalidate maintenance operations: by Physical Address
1026            (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1027            They are architecturally defined to behave as the execution of a
1028            clean operation followed immediately by an invalidate operation,
1029            both performing to the same memory location. This functionality
1030            is not correctly implemented in PL310 as clean lines are not
1031            invalidated as a result of these operations. Note that this errata
1032            uses Texas Instrument's secure monitor api.
1033 endmenu
1034
1035 source "arch/arm/common/Kconfig"
1036
1037 config FORCE_MAX_ZONEORDER
1038         int
1039         depends on SA1111
1040         default "9"
1041
1042 menu "Bus support"
1043
1044 config ARM_AMBA
1045         bool
1046
1047 config ISA
1048         bool
1049         help
1050           Find out whether you have ISA slots on your motherboard.  ISA is the
1051           name of a bus system, i.e. the way the CPU talks to the other stuff
1052           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1053           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1054           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1055
1056 # Select ISA DMA controller support
1057 config ISA_DMA
1058         bool
1059         select ISA_DMA_API
1060
1061 # Select ISA DMA interface
1062 config ISA_DMA_API
1063         bool
1064
1065 config PCI
1066         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1067         help
1068           Find out whether you have a PCI motherboard. PCI is the name of a
1069           bus system, i.e. the way the CPU talks to the other stuff inside
1070           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1071           VESA. If you have PCI, say Y, otherwise N.
1072
1073 config PCI_SYSCALL
1074         def_bool PCI
1075
1076 # Select the host bridge type
1077 config PCI_HOST_VIA82C505
1078         bool
1079         depends on PCI && ARCH_SHARK
1080         default y
1081
1082 config PCI_HOST_ITE8152
1083         bool
1084         depends on PCI && MACH_ARMCORE
1085         default y
1086         select DMABOUNCE
1087
1088 source "drivers/pci/Kconfig"
1089
1090 source "drivers/pcmcia/Kconfig"
1091
1092 endmenu
1093
1094 menu "Kernel Features"
1095
1096 source "kernel/time/Kconfig"
1097
1098 config SMP
1099         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1100         depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1101                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1102         depends on GENERIC_CLOCKEVENTS
1103         select USE_GENERIC_SMP_HELPERS
1104         select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1105         help
1106           This enables support for systems with more than one CPU. If you have
1107           a system with only one CPU, like most personal computers, say N. If
1108           you have a system with more than one CPU, say Y.
1109
1110           If you say N here, the kernel will run on single and multiprocessor
1111           machines, but will use only one CPU of a multiprocessor machine. If
1112           you say Y here, the kernel will run on many, but not all, single
1113           processor machines. On a single processor machine, the kernel will
1114           run faster if you say N here.
1115
1116           See also <file:Documentation/i386/IO-APIC.txt>,
1117           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1118           <http://www.linuxdoc.org/docs.html#howto>.
1119
1120           If you don't know what to do here, say N.
1121
1122 config HAVE_ARM_SCU
1123         bool
1124         depends on SMP
1125         help
1126           This option enables support for the ARM system coherency unit
1127
1128 config HAVE_ARM_TWD
1129         bool
1130         depends on SMP
1131         help
1132           This options enables support for the ARM timer and watchdog unit
1133
1134 choice
1135         prompt "Memory split"
1136         default VMSPLIT_3G
1137         help
1138           Select the desired split between kernel and user memory.
1139
1140           If you are not absolutely sure what you are doing, leave this
1141           option alone!
1142
1143         config VMSPLIT_3G
1144                 bool "3G/1G user/kernel split"
1145         config VMSPLIT_2G
1146                 bool "2G/2G user/kernel split"
1147         config VMSPLIT_1G
1148                 bool "1G/3G user/kernel split"
1149 endchoice
1150
1151 config PAGE_OFFSET
1152         hex
1153         default 0x40000000 if VMSPLIT_1G
1154         default 0x80000000 if VMSPLIT_2G
1155         default 0xC0000000
1156
1157 config NR_CPUS
1158         int "Maximum number of CPUs (2-32)"
1159         range 2 32
1160         depends on SMP
1161         default "4"
1162
1163 config HOTPLUG_CPU
1164         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1165         depends on SMP && HOTPLUG && EXPERIMENTAL
1166         help
1167           Say Y here to experiment with turning CPUs off and on.  CPUs
1168           can be controlled through /sys/devices/system/cpu.
1169
1170 config LOCAL_TIMERS
1171         bool "Use local timer interrupts"
1172         depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1173                 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1174         default y
1175         select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1176         help
1177           Enable support for local timers on SMP platforms, rather then the
1178           legacy IPI broadcast method.  Local timers allows the system
1179           accounting to be spread across the timer interval, preventing a
1180           "thundering herd" at every timer tick.
1181
1182 source kernel/Kconfig.preempt
1183
1184 config HZ
1185         int
1186         default 128 if ARCH_L7200
1187         default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
1188         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1189         default AT91_TIMER_HZ if ARCH_AT91
1190         default 100
1191
1192 config THUMB2_KERNEL
1193         bool "Compile the kernel in Thumb-2 mode"
1194         depends on CPU_V7 && EXPERIMENTAL
1195         select AEABI
1196         select ARM_ASM_UNIFIED
1197         help
1198           By enabling this option, the kernel will be compiled in
1199           Thumb-2 mode. A compiler/assembler that understand the unified
1200           ARM-Thumb syntax is needed.
1201
1202           If unsure, say N.
1203
1204 config ARM_ASM_UNIFIED
1205         bool
1206
1207 config AEABI
1208         bool "Use the ARM EABI to compile the kernel"
1209         help
1210           This option allows for the kernel to be compiled using the latest
1211           ARM ABI (aka EABI).  This is only useful if you are using a user
1212           space environment that is also compiled with EABI.
1213
1214           Since there are major incompatibilities between the legacy ABI and
1215           EABI, especially with regard to structure member alignment, this
1216           option also changes the kernel syscall calling convention to
1217           disambiguate both ABIs and allow for backward compatibility support
1218           (selected with CONFIG_OABI_COMPAT).
1219
1220           To use this you need GCC version 4.0.0 or later.
1221
1222 config OABI_COMPAT
1223         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1224         depends on AEABI && EXPERIMENTAL
1225         default y
1226         help
1227           This option preserves the old syscall interface along with the
1228           new (ARM EABI) one. It also provides a compatibility layer to
1229           intercept syscalls that have structure arguments which layout
1230           in memory differs between the legacy ABI and the new ARM EABI
1231           (only for non "thumb" binaries). This option adds a tiny
1232           overhead to all syscalls and produces a slightly larger kernel.
1233           If you know you'll be using only pure EABI user space then you
1234           can say N here. If this option is not selected and you attempt
1235           to execute a legacy ABI binary then the result will be
1236           UNPREDICTABLE (in fact it can be predicted that it won't work
1237           at all). If in doubt say Y.
1238
1239 config ARCH_HAS_HOLES_MEMORYMODEL
1240         bool
1241
1242 # Discontigmem is deprecated
1243 config ARCH_DISCONTIGMEM_ENABLE
1244         bool
1245
1246 config ARCH_SPARSEMEM_ENABLE
1247         bool
1248
1249 config ARCH_SPARSEMEM_DEFAULT
1250         def_bool ARCH_SPARSEMEM_ENABLE
1251
1252 config ARCH_SELECT_MEMORY_MODEL
1253         def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1254
1255 config NODES_SHIFT
1256         int
1257         default "4" if ARCH_LH7A40X
1258         default "2"
1259         depends on NEED_MULTIPLE_NODES
1260
1261 config HIGHMEM
1262         bool "High Memory Support (EXPERIMENTAL)"
1263         depends on MMU && EXPERIMENTAL
1264         help
1265           The address space of ARM processors is only 4 Gigabytes large
1266           and it has to accommodate user address space, kernel address
1267           space as well as some memory mapped IO. That means that, if you
1268           have a large amount of physical memory and/or IO, not all of the
1269           memory can be "permanently mapped" by the kernel. The physical
1270           memory that is not permanently mapped is called "high memory".
1271
1272           Depending on the selected kernel/user memory split, minimum
1273           vmalloc space and actual amount of RAM, you may not need this
1274           option which should result in a slightly faster kernel.
1275
1276           If unsure, say n.
1277
1278 config HIGHPTE
1279         bool "Allocate 2nd-level pagetables from highmem"
1280         depends on HIGHMEM
1281         depends on !OUTER_CACHE
1282
1283 config HW_PERF_EVENTS
1284         bool "Enable hardware performance counter support for perf events"
1285         depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
1286         default y
1287         help
1288           Enable hardware performance counter support for perf events. If
1289           disabled, perf events will use software events only.
1290
1291 source "mm/Kconfig"
1292
1293 config LEDS
1294         bool "Timer and CPU usage LEDs"
1295         depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1296                    ARCH_EBSA285 || ARCH_INTEGRATOR || \
1297                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1298                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1299                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1300                    ARCH_AT91 || ARCH_DAVINCI || \
1301                    ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1302         help
1303           If you say Y here, the LEDs on your machine will be used
1304           to provide useful information about your current system status.
1305
1306           If you are compiling a kernel for a NetWinder or EBSA-285, you will
1307           be able to select which LEDs are active using the options below. If
1308           you are compiling a kernel for the EBSA-110 or the LART however, the
1309           red LED will simply flash regularly to indicate that the system is
1310           still functional. It is safe to say Y here if you have a CATS
1311           system, but the driver will do nothing.
1312
1313 config LEDS_TIMER
1314         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1315                             OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1316                             || MACH_OMAP_PERSEUS2
1317         depends on LEDS
1318         depends on !GENERIC_CLOCKEVENTS
1319         default y if ARCH_EBSA110
1320         help
1321           If you say Y here, one of the system LEDs (the green one on the
1322           NetWinder, the amber one on the EBSA285, or the red one on the LART)
1323           will flash regularly to indicate that the system is still
1324           operational. This is mainly useful to kernel hackers who are
1325           debugging unstable kernels.
1326
1327           The LART uses the same LED for both Timer LED and CPU usage LED
1328           functions. You may choose to use both, but the Timer LED function
1329           will overrule the CPU usage LED.
1330
1331 config LEDS_CPU
1332         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1333                         !ARCH_OMAP) \
1334                         || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1335                         || MACH_OMAP_PERSEUS2
1336         depends on LEDS
1337         help
1338           If you say Y here, the red LED will be used to give a good real
1339           time indication of CPU usage, by lighting whenever the idle task
1340           is not currently executing.
1341
1342           The LART uses the same LED for both Timer LED and CPU usage LED
1343           functions. You may choose to use both, but the Timer LED function
1344           will overrule the CPU usage LED.
1345
1346 config ALIGNMENT_TRAP
1347         bool
1348         depends on CPU_CP15_MMU
1349         default y if !ARCH_EBSA110
1350         select HAVE_PROC_CPU if PROC_FS
1351         help
1352           ARM processors cannot fetch/store information which is not
1353           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1354           address divisible by 4. On 32-bit ARM processors, these non-aligned
1355           fetch/store instructions will be emulated in software if you say
1356           here, which has a severe performance impact. This is necessary for
1357           correct operation of some network protocols. With an IP-only
1358           configuration it is safe to say N, otherwise say Y.
1359
1360 config UACCESS_WITH_MEMCPY
1361         bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1362         depends on MMU && EXPERIMENTAL
1363         default y if CPU_FEROCEON
1364         help
1365           Implement faster copy_to_user and clear_user methods for CPU
1366           cores where a 8-word STM instruction give significantly higher
1367           memory write throughput than a sequence of individual 32bit stores.
1368
1369           A possible side effect is a slight increase in scheduling latency
1370           between threads sharing the same address space if they invoke
1371           such copy operations with large buffers.
1372
1373           However, if the CPU data cache is using a write-allocate mode,
1374           this option is unlikely to provide any performance gain.
1375
1376 endmenu
1377
1378 menu "Boot options"
1379
1380 # Compressed boot loader in ROM.  Yes, we really want to ask about
1381 # TEXT and BSS so we preserve their values in the config files.
1382 config ZBOOT_ROM_TEXT
1383         hex "Compressed ROM boot loader base address"
1384         default "0"
1385         help
1386           The physical address at which the ROM-able zImage is to be
1387           placed in the target.  Platforms which normally make use of
1388           ROM-able zImage formats normally set this to a suitable
1389           value in their defconfig file.
1390
1391           If ZBOOT_ROM is not enabled, this has no effect.
1392
1393 config ZBOOT_ROM_BSS
1394         hex "Compressed ROM boot loader BSS address"
1395         default "0"
1396         help
1397           The base address of an area of read/write memory in the target
1398           for the ROM-able zImage which must be available while the
1399           decompressor is running. It must be large enough to hold the
1400           entire decompressed kernel plus an additional 128 KiB.
1401           Platforms which normally make use of ROM-able zImage formats
1402           normally set this to a suitable value in their defconfig file.
1403
1404           If ZBOOT_ROM is not enabled, this has no effect.
1405
1406 config ZBOOT_ROM
1407         bool "Compressed boot loader in ROM/flash"
1408         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1409         help
1410           Say Y here if you intend to execute your compressed kernel image
1411           (zImage) directly from ROM or flash.  If unsure, say N.
1412
1413 config CMDLINE
1414         string "Default kernel command string"
1415         default ""
1416         help
1417           On some architectures (EBSA110 and CATS), there is currently no way
1418           for the boot loader to pass arguments to the kernel. For these
1419           architectures, you should supply some command-line options at build
1420           time by entering them here. As a minimum, you should specify the
1421           memory size and the root device (e.g., mem=64M root=/dev/nfs).
1422
1423 config XIP_KERNEL
1424         bool "Kernel Execute-In-Place from ROM"
1425         depends on !ZBOOT_ROM
1426         help
1427           Execute-In-Place allows the kernel to run from non-volatile storage
1428           directly addressable by the CPU, such as NOR flash. This saves RAM
1429           space since the text section of the kernel is not loaded from flash
1430           to RAM.  Read-write sections, such as the data section and stack,
1431           are still copied to RAM.  The XIP kernel is not compressed since
1432           it has to run directly from flash, so it will take more space to
1433           store it.  The flash address used to link the kernel object files,
1434           and for storing it, is configuration dependent. Therefore, if you
1435           say Y here, you must know the proper physical address where to
1436           store the kernel image depending on your own flash memory usage.
1437
1438           Also note that the make target becomes "make xipImage" rather than
1439           "make zImage" or "make Image".  The final kernel binary to put in
1440           ROM memory will be arch/arm/boot/xipImage.
1441
1442           If unsure, say N.
1443
1444 config XIP_PHYS_ADDR
1445         hex "XIP Kernel Physical Location"
1446         depends on XIP_KERNEL
1447         default "0x00080000"
1448         help
1449           This is the physical address in your flash memory the kernel will
1450           be linked for and stored to.  This address is dependent on your
1451           own flash usage.
1452
1453 config KEXEC
1454         bool "Kexec system call (EXPERIMENTAL)"
1455         depends on EXPERIMENTAL
1456         help
1457           kexec is a system call that implements the ability to shutdown your
1458           current kernel, and to start another kernel.  It is like a reboot
1459           but it is independent of the system firmware.   And like a reboot
1460           you can start any kernel with it, not just Linux.
1461
1462           It is an ongoing process to be certain the hardware in a machine
1463           is properly shutdown, so do not be surprised if this code does not
1464           initially work for you.  It may help to enable device hotplugging
1465           support.
1466
1467 config ATAGS_PROC
1468         bool "Export atags in procfs"
1469         depends on KEXEC
1470         default y
1471         help
1472           Should the atags used to boot the kernel be exported in an "atags"
1473           file in procfs. Useful with kexec.
1474
1475 endmenu
1476
1477 menu "CPU Power Management"
1478
1479 if ARCH_HAS_CPUFREQ
1480
1481 source "drivers/cpufreq/Kconfig"
1482
1483 config CPU_FREQ_SA1100
1484         bool
1485
1486 config CPU_FREQ_SA1110
1487         bool
1488
1489 config CPU_FREQ_INTEGRATOR
1490         tristate "CPUfreq driver for ARM Integrator CPUs"
1491         depends on ARCH_INTEGRATOR && CPU_FREQ
1492         default y
1493         help
1494           This enables the CPUfreq driver for ARM Integrator CPUs.
1495
1496           For details, take a look at <file:Documentation/cpu-freq>.
1497
1498           If in doubt, say Y.
1499
1500 config CPU_FREQ_PXA
1501         bool
1502         depends on CPU_FREQ && ARCH_PXA && PXA25x
1503         default y
1504         select CPU_FREQ_DEFAULT_GOV_USERSPACE
1505
1506 config CPU_FREQ_S3C64XX
1507         bool "CPUfreq support for Samsung S3C64XX CPUs"
1508         depends on CPU_FREQ && CPU_S3C6410
1509
1510 config CPU_FREQ_S3C
1511         bool
1512         help
1513           Internal configuration node for common cpufreq on Samsung SoC
1514
1515 config CPU_FREQ_S3C24XX
1516         bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1517         depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1518         select CPU_FREQ_S3C
1519         help
1520           This enables the CPUfreq driver for the Samsung S3C24XX family
1521           of CPUs.
1522
1523           For details, take a look at <file:Documentation/cpu-freq>.
1524
1525           If in doubt, say N.
1526
1527 config CPU_FREQ_S3C24XX_PLL
1528         bool "Support CPUfreq changing of PLL frequency"
1529         depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1530         help
1531           Compile in support for changing the PLL frequency from the
1532           S3C24XX series CPUfreq driver. The PLL takes time to settle
1533           after a frequency change, so by default it is not enabled.
1534
1535           This also means that the PLL tables for the selected CPU(s) will
1536           be built which may increase the size of the kernel image.
1537
1538 config CPU_FREQ_S3C24XX_DEBUG
1539         bool "Debug CPUfreq Samsung driver core"
1540         depends on CPU_FREQ_S3C24XX
1541         help
1542           Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1543
1544 config CPU_FREQ_S3C24XX_IODEBUG
1545         bool "Debug CPUfreq Samsung driver IO timing"
1546         depends on CPU_FREQ_S3C24XX
1547         help
1548           Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1549
1550 config CPU_FREQ_S3C24XX_DEBUGFS
1551         bool "Export debugfs for CPUFreq"
1552         depends on CPU_FREQ_S3C24XX && DEBUG_FS
1553         help
1554           Export status information via debugfs.
1555
1556 endif
1557
1558 source "drivers/cpuidle/Kconfig"
1559
1560 endmenu
1561
1562 menu "Floating point emulation"
1563
1564 comment "At least one emulation must be selected"
1565
1566 config FPE_NWFPE
1567         bool "NWFPE math emulation"
1568         depends on !AEABI || OABI_COMPAT
1569         ---help---
1570           Say Y to include the NWFPE floating point emulator in the kernel.
1571           This is necessary to run most binaries. Linux does not currently
1572           support floating point hardware so you need to say Y here even if
1573           your machine has an FPA or floating point co-processor podule.
1574
1575           You may say N here if you are going to load the Acorn FPEmulator
1576           early in the bootup.
1577
1578 config FPE_NWFPE_XP
1579         bool "Support extended precision"
1580         depends on FPE_NWFPE
1581         help
1582           Say Y to include 80-bit support in the kernel floating-point
1583           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
1584           Note that gcc does not generate 80-bit operations by default,
1585           so in most cases this option only enlarges the size of the
1586           floating point emulator without any good reason.
1587
1588           You almost surely want to say N here.
1589
1590 config FPE_FASTFPE
1591         bool "FastFPE math emulation (EXPERIMENTAL)"
1592         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1593         ---help---
1594           Say Y here to include the FAST floating point emulator in the kernel.
1595           This is an experimental much faster emulator which now also has full
1596           precision for the mantissa.  It does not support any exceptions.
1597           It is very simple, and approximately 3-6 times faster than NWFPE.
1598
1599           It should be sufficient for most programs.  It may be not suitable
1600           for scientific calculations, but you have to check this for yourself.
1601           If you do not feel you need a faster FP emulation you should better
1602           choose NWFPE.
1603
1604 config VFP
1605         bool "VFP-format floating point maths"
1606         depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1607         help
1608           Say Y to include VFP support code in the kernel. This is needed
1609           if your hardware includes a VFP unit.
1610
1611           Please see <file:Documentation/arm/VFP/release-notes.txt> for
1612           release notes and additional status information.
1613
1614           Say N if your target does not have VFP hardware.
1615
1616 config VFPv3
1617         bool
1618         depends on VFP
1619         default y if CPU_V7
1620
1621 config NEON
1622         bool "Advanced SIMD (NEON) Extension support"
1623         depends on VFPv3 && CPU_V7
1624         help
1625           Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1626           Extension.
1627
1628 endmenu
1629
1630 menu "Userspace binary formats"
1631
1632 source "fs/Kconfig.binfmt"
1633
1634 config ARTHUR
1635         tristate "RISC OS personality"
1636         depends on !AEABI
1637         help
1638           Say Y here to include the kernel code necessary if you want to run
1639           Acorn RISC OS/Arthur binaries under Linux. This code is still very
1640           experimental; if this sounds frightening, say N and sleep in peace.
1641           You can also say M here to compile this support as a module (which
1642           will be called arthur).
1643
1644 endmenu
1645
1646 menu "Power management options"
1647
1648 source "kernel/power/Kconfig"
1649
1650 config ARCH_SUSPEND_POSSIBLE
1651         def_bool y
1652
1653 endmenu
1654
1655 source "net/Kconfig"
1656
1657 source "drivers/Kconfig"
1658
1659 source "fs/Kconfig"
1660
1661 source "arch/arm/Kconfig.debug"
1662
1663 source "security/Kconfig"
1664
1665 source "crypto/Kconfig"
1666
1667 source "lib/Kconfig"