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 RTC_LIB
  12         help
  13           The ARM series is a line of low-power-consumption RISC chip designs
  14           licensed by ARM Ltd and targeted at embedded applications and
  15           handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
  16           manufactured, but legacy ARM-based PC hardware remains popular in
  17           Europe.  There is an ARM Linux project with a web page at
  18           <http://www.arm.linux.org.uk/>.
  19
  20 config MMU
  21         bool
  22         default y
  23
  24 config EISA
  25         bool
  26         ---help---
  27           The Extended Industry Standard Architecture (EISA) bus was
  28           developed as an open alternative to the IBM MicroChannel bus.
  29
  30           The EISA bus provided some of the features of the IBM MicroChannel
  31           bus while maintaining backward compatibility with cards made for
  32           the older ISA bus.  The EISA bus saw limited use between 1988 and
  33           1995 when it was made obsolete by the PCI bus.
  34
  35           Say Y here if you are building a kernel for an EISA-based machine.
  36
  37           Otherwise, say N.
  38
  39 config SBUS
  40         bool
  41
  42 config MCA
  43         bool
  44         help
  45           MicroChannel Architecture is found in some IBM PS/2 machines and
  46           laptops.  It is a bus system similar to PCI or ISA. See
  47           <file:Documentation/mca.txt> (and especially the web page given
  48           there) before attempting to build an MCA bus kernel.
  49
  50 config GENERIC_HARDIRQS
  51         bool
  52         default y
  53
  54 config TRACE_IRQFLAGS_SUPPORT
  55         bool
  56         default y
  57
  58 config HARDIRQS_SW_RESEND
  59         bool
  60         default y
  61
  62 config GENERIC_IRQ_PROBE
  63         bool
  64         default y
  65
  66 config RWSEM_GENERIC_SPINLOCK
  67         bool
  68         default y
  69
  70 config RWSEM_XCHGADD_ALGORITHM
  71         bool
  72
  73 config GENERIC_HWEIGHT
  74         bool
  75         default y
  76
  77 config GENERIC_CALIBRATE_DELAY
  78         bool
  79         default y
  80
  81 config GENERIC_BUST_SPINLOCK
  82         bool
  83
  84 config ARCH_MAY_HAVE_PC_FDC
  85         bool
  86
  87 config GENERIC_ISA_DMA
  88         bool
  89
  90 config FIQ
  91         bool
  92
  93 config ARCH_MTD_XIP
  94         bool
  95
  96 config VECTORS_BASE
  97         hex
  98         default 0xffff0000 if MMU
  99         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 100         default 0x00000000
 101         help
 102           The base address of exception vectors.
 103
 104 source "init/Kconfig"
 105
 106 menu "System Type"
 107
 108 choice
 109         prompt "ARM system type"
 110         default ARCH_VERSATILE
 111
 112 config ARCH_AAEC2000
 113         bool "Agilent AAEC-2000 based"
 114         select ARM_AMBA
 115         help
 116           This enables support for systems based on the Agilent AAEC-2000
 117
 118 config ARCH_INTEGRATOR
 119         bool "ARM Ltd. Integrator family"
 120         select ARM_AMBA
 121         select ICST525
 122         help
 123           Support for ARM's Integrator platform.
 124
 125 config ARCH_REALVIEW
 126         bool "ARM Ltd. RealView family"
 127         select ARM_AMBA
 128         select ICST307
 129         help
 130           This enables support for ARM Ltd RealView boards.
 131
 132 config ARCH_VERSATILE
 133         bool "ARM Ltd. Versatile family"
 134         select ARM_AMBA
 135         select ARM_VIC
 136         select ICST307
 137         help
 138           This enables support for ARM Ltd Versatile board.
 139
 140 config ARCH_AT91
 141         bool "Atmel AT91"
 142         help
 143           This enables support for systems based on the Atmel AT91RM9200
 144           and AT91SAM9xxx processors.
 145
 146 config ARCH_CLPS7500
 147         bool "Cirrus CL-PS7500FE"
 148         select TIMER_ACORN
 149         select ISA
 150         help
 151           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 152
 153 config ARCH_CLPS711X
 154         bool "Cirrus Logic CLPS711x/EP721x-based"
 155         help
 156           Support for Cirrus Logic 711x/721x based boards.
 157
 158 config ARCH_CO285
 159         bool "Co-EBSA285"
 160         select FOOTBRIDGE
 161         select FOOTBRIDGE_ADDIN
 162         help
 163           Support for Intel's EBSA285 companion chip.
 164
 165 config ARCH_EBSA110
 166         bool "EBSA-110"
 167         select ISA
 168         help
 169           This is an evaluation board for the StrongARM processor available
 170           from Digital. It has limited hardware on-board, including an
 171           Ethernet interface, two PCMCIA sockets, two serial ports and a
 172           parallel port.
 173
 174 config ARCH_EP93XX
 175         bool "EP93xx-based"
 176         select ARM_AMBA
 177         select ARM_VIC
 178         help
 179           This enables support for the Cirrus EP93xx series of CPUs.
 180
 181 config ARCH_FOOTBRIDGE
 182         bool "FootBridge"
 183         select FOOTBRIDGE
 184         help
 185           Support for systems based on the DC21285 companion chip
 186           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 187
 188 config ARCH_NETX
 189         bool "Hilscher NetX based"
 190         select ARM_VIC
 191         help
 192           This enables support for systems based on the Hilscher NetX Soc
 193
 194 config ARCH_H720X
 195         bool "Hynix HMS720x-based"
 196         select ISA_DMA_API
 197         help
 198           This enables support for systems based on the Hynix HMS720x
 199
 200 config ARCH_IMX
 201         bool "IMX"
 202         help
 203           Support for Motorola's i.MX family of processors (MX1, MXL).
 204
 205 config ARCH_IOP3XX
 206         bool "IOP3xx-based"
 207         depends on MMU
 208         select PCI
 209         help
 210           Support for Intel's IOP3XX (XScale) family of processors.
 211
 212 config ARCH_IXP4XX
 213         bool "IXP4xx-based"
 214         depends on MMU
 215         help
 216           Support for Intel's IXP4XX (XScale) family of processors.
 217
 218 config ARCH_IXP2000
 219         bool "IXP2400/2800-based"
 220         depends on MMU
 221         select PCI
 222         help
 223           Support for Intel's IXP2400/2800 (XScale) family of processors.
 224
 225 config ARCH_IXP23XX
 226         bool "IXP23XX-based"
 227         depends on MMU
 228         select PCI
 229         help
 230           Support for Intel's IXP23xx (XScale) family of processors.
 231
 232 config ARCH_L7200
 233         bool "LinkUp-L7200"
 234         select FIQ
 235         help
 236           Say Y here if you intend to run this kernel on a LinkUp Systems
 237           L7200 Software Development Board which uses an ARM720T processor.
 238           Information on this board can be obtained at:
 239
 240           <http://www.linkupsys.com/>
 241
 242           If you have any questions or comments about the Linux kernel port
 243           to this board, send e-mail to <sjhill@cotw.com>.
 244
 245 config ARCH_PNX4008
 246         bool "Philips Nexperia PNX4008 Mobile"
 247         help
 248           This enables support for Philips PNX4008 mobile platform.
 249
 250 config ARCH_PXA
 251         bool "PXA2xx-based"
 252         depends on MMU
 253         select ARCH_MTD_XIP
 254         help
 255           Support for Intel's PXA2XX processor line.
 256
 257 config ARCH_RPC
 258         bool "RiscPC"
 259         select ARCH_ACORN
 260         select FIQ
 261         select TIMER_ACORN
 262         select ARCH_MAY_HAVE_PC_FDC
 263         select ISA_DMA_API
 264         help
 265           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 266           CD-ROM interface, serial and parallel port, and the floppy drive.
 267
 268 config ARCH_SA1100
 269         bool "SA1100-based"
 270         select ISA
 271         select ARCH_DISCONTIGMEM_ENABLE
 272         select ARCH_MTD_XIP
 273         help
 274           Support for StrongARM 11x0 based boards.
 275
 276 config ARCH_S3C2410
 277         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
 278         help
 279           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 280           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 281           the Samsung SMDK2410 development board (and derivatives).
 282
 283 config ARCH_SHARK
 284         bool "Shark"
 285         select ISA
 286         select ISA_DMA
 287         select PCI
 288         help
 289           Support for the StrongARM based Digital DNARD machine, also known
 290           as "Shark" (<http://www.shark-linux.de/shark.html>).
 291
 292 config ARCH_LH7A40X
 293         bool "Sharp LH7A40X"
 294         help
 295           Say Y here for systems based on one of the Sharp LH7A40X
 296           System on a Chip processors.  These CPUs include an ARM922T
 297           core with a wide array of integrated devices for
 298           hand-held and low-power applications.
 299
 300 config ARCH_OMAP
 301         bool "TI OMAP"
 302         help
 303           Support for TI's OMAP platform (OMAP1 and OMAP2).
 304
 305 endchoice
 306
 307 source "arch/arm/mach-clps711x/Kconfig"
 308
 309 source "arch/arm/mach-ep93xx/Kconfig"
 310
 311 source "arch/arm/mach-footbridge/Kconfig"
 312
 313 source "arch/arm/mach-integrator/Kconfig"
 314
 315 source "arch/arm/mach-iop3xx/Kconfig"
 316
 317 source "arch/arm/mach-ixp4xx/Kconfig"
 318
 319 source "arch/arm/mach-ixp2000/Kconfig"
 320
 321 source "arch/arm/mach-ixp23xx/Kconfig"
 322
 323 source "arch/arm/mach-pxa/Kconfig"
 324
 325 source "arch/arm/mach-sa1100/Kconfig"
 326
 327 source "arch/arm/plat-omap/Kconfig"
 328
 329 source "arch/arm/mach-omap1/Kconfig"
 330
 331 source "arch/arm/mach-omap2/Kconfig"
 332
 333 source "arch/arm/mach-s3c2410/Kconfig"
 334
 335 source "arch/arm/mach-lh7a40x/Kconfig"
 336
 337 source "arch/arm/mach-imx/Kconfig"
 338
 339 source "arch/arm/mach-h720x/Kconfig"
 340
 341 source "arch/arm/mach-versatile/Kconfig"
 342
 343 source "arch/arm/mach-aaec2000/Kconfig"
 344
 345 source "arch/arm/mach-realview/Kconfig"
 346
 347 source "arch/arm/mach-at91rm9200/Kconfig"
 348
 349 source "arch/arm/mach-netx/Kconfig"
 350
 351 # Definitions to make life easier
 352 config ARCH_ACORN
 353         bool
 354
 355 source arch/arm/mm/Kconfig
 356
 357 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 358 config XSCALE_PMU
 359         bool
 360         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 361         default y
 362
 363 if !MMU
 364 source "arch/arm/Kconfig-nommu"
 365 endif
 366
 367 endmenu
 368
 369 source "arch/arm/common/Kconfig"
 370
 371 config FORCE_MAX_ZONEORDER
 372         int
 373         depends on SA1111
 374         default "9"
 375
 376 menu "Bus support"
 377
 378 config ARM_AMBA
 379         bool
 380
 381 config ISA
 382         bool
 383         help
 384           Find out whether you have ISA slots on your motherboard.  ISA is the
 385           name of a bus system, i.e. the way the CPU talks to the other stuff
 386           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 387           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 388           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 389
 390 # Select ISA DMA controller support
 391 config ISA_DMA
 392         bool
 393         select ISA_DMA_API
 394
 395 # Select ISA DMA interface
 396 config ISA_DMA_API
 397         bool
 398
 399 config PCI
 400         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
 401         help
 402           Find out whether you have a PCI motherboard. PCI is the name of a
 403           bus system, i.e. the way the CPU talks to the other stuff inside
 404           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 405           VESA. If you have PCI, say Y, otherwise N.
 406
 407           The PCI-HOWTO, available from
 408           <http://www.tldp.org/docs.html#howto>, contains valuable
 409           information about which PCI hardware does work under Linux and which
 410           doesn't.
 411
 412 # Select the host bridge type
 413 config PCI_HOST_VIA82C505
 414         bool
 415         depends on PCI && ARCH_SHARK
 416         default y
 417
 418 source "drivers/pci/Kconfig"
 419
 420 source "drivers/pcmcia/Kconfig"
 421
 422 endmenu
 423
 424 menu "Kernel Features"
 425
 426 config SMP
 427         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 428         depends on EXPERIMENTAL && REALVIEW_MPCORE
 429         help
 430           This enables support for systems with more than one CPU. If you have
 431           a system with only one CPU, like most personal computers, say N. If
 432           you have a system with more than one CPU, say Y.
 433
 434           If you say N here, the kernel will run on single and multiprocessor
 435           machines, but will use only one CPU of a multiprocessor machine. If
 436           you say Y here, the kernel will run on many, but not all, single
 437           processor machines. On a single processor machine, the kernel will
 438           run faster if you say N here.
 439
 440           See also the <file:Documentation/smp.txt>,
 441           <file:Documentation/i386/IO-APIC.txt>,
 442           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 443           <http://www.linuxdoc.org/docs.html#howto>.
 444
 445           If you don't know what to do here, say N.
 446
 447 config NR_CPUS
 448         int "Maximum number of CPUs (2-32)"
 449         range 2 32
 450         depends on SMP
 451         default "4"
 452
 453 config HOTPLUG_CPU
 454         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 455         depends on SMP && HOTPLUG && EXPERIMENTAL
 456         help
 457           Say Y here to experiment with turning CPUs off and on.  CPUs
 458           can be controlled through /sys/devices/system/cpu.
 459
 460 config LOCAL_TIMERS
 461         bool "Use local timer interrupts"
 462         depends on SMP && REALVIEW_MPCORE
 463         default y
 464         help
 465           Enable support for local timers on SMP platforms, rather then the
 466           legacy IPI broadcast method.  Local timers allows the system
 467           accounting to be spread across the timer interval, preventing a
 468           "thundering herd" at every timer tick.
 469
 470 config PREEMPT
 471         bool "Preemptible Kernel (EXPERIMENTAL)"
 472         depends on EXPERIMENTAL
 473         help
 474           This option reduces the latency of the kernel when reacting to
 475           real-time or interactive events by allowing a low priority process to
 476           be preempted even if it is in kernel mode executing a system call.
 477           This allows applications to run more reliably even when the system is
 478           under load.
 479
 480           Say Y here if you are building a kernel for a desktop, embedded
 481           or real-time system.  Say N if you are unsure.
 482
 483 config NO_IDLE_HZ
 484         bool "Dynamic tick timer"
 485         help
 486           Select this option if you want to disable continuous timer ticks
 487           and have them programmed to occur as required. This option saves
 488           power as the system can remain in idle state for longer.
 489
 490           By default dynamic tick is disabled during the boot, and can be
 491           manually enabled with:
 492
 493             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 494
 495           Alternatively, if you want dynamic tick automatically enabled
 496           during boot, pass "dyntick=enable" via the kernel command string.
 497
 498           Please note that dynamic tick may affect the accuracy of
 499           timekeeping on some platforms depending on the implementation.
 500           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 501           to have accurate timekeeping with dynamic tick.
 502
 503 config HZ
 504         int
 505         default 128 if ARCH_L7200
 506         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 507         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 508         default 100
 509
 510 config AEABI
 511         bool "Use the ARM EABI to compile the kernel"
 512         help
 513           This option allows for the kernel to be compiled using the latest
 514           ARM ABI (aka EABI).  This is only useful if you are using a user
 515           space environment that is also compiled with EABI.
 516
 517           Since there are major incompatibilities between the legacy ABI and
 518           EABI, especially with regard to structure member alignment, this
 519           option also changes the kernel syscall calling convention to
 520           disambiguate both ABIs and allow for backward compatibility support
 521           (selected with CONFIG_OABI_COMPAT).
 522
 523           To use this you need GCC version 4.0.0 or later.
 524
 525 config OABI_COMPAT
 526         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 527         depends on AEABI && EXPERIMENTAL
 528         default y
 529         help
 530           This option preserves the old syscall interface along with the
 531           new (ARM EABI) one. It also provides a compatibility layer to
 532           intercept syscalls that have structure arguments which layout
 533           in memory differs between the legacy ABI and the new ARM EABI
 534           (only for non "thumb" binaries). This option adds a tiny
 535           overhead to all syscalls and produces a slightly larger kernel.
 536           If you know you'll be using only pure EABI user space then you
 537           can say N here. If this option is not selected and you attempt
 538           to execute a legacy ABI binary then the result will be
 539           UNPREDICTABLE (in fact it can be predicted that it won't work
 540           at all). If in doubt say Y.
 541
 542 config ARCH_DISCONTIGMEM_ENABLE
 543         bool
 544         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 545         help
 546           Say Y to support efficient handling of discontiguous physical memory,
 547           for architectures which are either NUMA (Non-Uniform Memory Access)
 548           or have huge holes in the physical address space for other reasons.
 549           See <file:Documentation/vm/numa> for more.
 550
 551 config NODES_SHIFT
 552         int
 553         default "4" if ARCH_LH7A40X
 554         default "2"
 555         depends on NEED_MULTIPLE_NODES
 556
 557 source "mm/Kconfig"
 558
 559 config LEDS
 560         bool "Timer and CPU usage LEDs"
 561         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 562                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 563                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 564                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 565                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 566                    ARCH_AT91RM9200 || MACH_TRIZEPS4
 567         help
 568           If you say Y here, the LEDs on your machine will be used
 569           to provide useful information about your current system status.
 570
 571           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 572           be able to select which LEDs are active using the options below. If
 573           you are compiling a kernel for the EBSA-110 or the LART however, the
 574           red LED will simply flash regularly to indicate that the system is
 575           still functional. It is safe to say Y here if you have a CATS
 576           system, but the driver will do nothing.
 577
 578 config LEDS_TIMER
 579         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 580                             MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 581         depends on LEDS
 582         default y if ARCH_EBSA110
 583         help
 584           If you say Y here, one of the system LEDs (the green one on the
 585           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 586           will flash regularly to indicate that the system is still
 587           operational. This is mainly useful to kernel hackers who are
 588           debugging unstable kernels.
 589
 590           The LART uses the same LED for both Timer LED and CPU usage LED
 591           functions. You may choose to use both, but the Timer LED function
 592           will overrule the CPU usage LED.
 593
 594 config LEDS_CPU
 595         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 596                         !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 597         depends on LEDS
 598         help
 599           If you say Y here, the red LED will be used to give a good real
 600           time indication of CPU usage, by lighting whenever the idle task
 601           is not currently executing.
 602
 603           The LART uses the same LED for both Timer LED and CPU usage LED
 604           functions. You may choose to use both, but the Timer LED function
 605           will overrule the CPU usage LED.
 606
 607 config ALIGNMENT_TRAP
 608         bool
 609         default y if !ARCH_EBSA110
 610         help
 611           ARM processors can not fetch/store information which is not
 612           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 613           address divisible by 4. On 32-bit ARM processors, these non-aligned
 614           fetch/store instructions will be emulated in software if you say
 615           here, which has a severe performance impact. This is necessary for
 616           correct operation of some network protocols. With an IP-only
 617           configuration it is safe to say N, otherwise say Y.
 618
 619 endmenu
 620
 621 menu "Boot options"
 622
 623 # Compressed boot loader in ROM.  Yes, we really want to ask about
 624 # TEXT and BSS so we preserve their values in the config files.
 625 config ZBOOT_ROM_TEXT
 626         hex "Compressed ROM boot loader base address"
 627         default "0"
 628         help
 629           The physical address at which the ROM-able zImage is to be
 630           placed in the target.  Platforms which normally make use of
 631           ROM-able zImage formats normally set this to a suitable
 632           value in their defconfig file.
 633
 634           If ZBOOT_ROM is not enabled, this has no effect.
 635
 636 config ZBOOT_ROM_BSS
 637         hex "Compressed ROM boot loader BSS address"
 638         default "0"
 639         help
 640           The base address of 64KiB of read/write memory in the target
 641           for the ROM-able zImage, which must be available while the
 642           decompressor is running.  Platforms which normally make use of
 643           ROM-able zImage formats normally set this to a suitable
 644           value in their defconfig file.
 645
 646           If ZBOOT_ROM is not enabled, this has no effect.
 647
 648 config ZBOOT_ROM
 649         bool "Compressed boot loader in ROM/flash"
 650         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 651         help
 652           Say Y here if you intend to execute your compressed kernel image
 653           (zImage) directly from ROM or flash.  If unsure, say N.
 654
 655 config CMDLINE
 656         string "Default kernel command string"
 657         default ""
 658         help
 659           On some architectures (EBSA110 and CATS), there is currently no way
 660           for the boot loader to pass arguments to the kernel. For these
 661           architectures, you should supply some command-line options at build
 662           time by entering them here. As a minimum, you should specify the
 663           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 664
 665 config XIP_KERNEL
 666         bool "Kernel Execute-In-Place from ROM"
 667         depends on !ZBOOT_ROM
 668         help
 669           Execute-In-Place allows the kernel to run from non-volatile storage
 670           directly addressable by the CPU, such as NOR flash. This saves RAM
 671           space since the text section of the kernel is not loaded from flash
 672           to RAM.  Read-write sections, such as the data section and stack,
 673           are still copied to RAM.  The XIP kernel is not compressed since
 674           it has to run directly from flash, so it will take more space to
 675           store it.  The flash address used to link the kernel object files,
 676           and for storing it, is configuration dependent. Therefore, if you
 677           say Y here, you must know the proper physical address where to
 678           store the kernel image depending on your own flash memory usage.
 679
 680           Also note that the make target becomes "make xipImage" rather than
 681           "make zImage" or "make Image".  The final kernel binary to put in
 682           ROM memory will be arch/arm/boot/xipImage.
 683
 684           If unsure, say N.
 685
 686 config XIP_PHYS_ADDR
 687         hex "XIP Kernel Physical Location"
 688         depends on XIP_KERNEL
 689         default "0x00080000"
 690         help
 691           This is the physical address in your flash memory the kernel will
 692           be linked for and stored to.  This address is dependent on your
 693           own flash usage.
 694
 695 endmenu
 696
 697 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP)
 698
 699 menu "CPU Frequency scaling"
 700
 701 source "drivers/cpufreq/Kconfig"
 702
 703 config CPU_FREQ_SA1100
 704         bool
 705         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 706         default y
 707
 708 config CPU_FREQ_SA1110
 709         bool
 710         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 711         default y
 712
 713 config CPU_FREQ_INTEGRATOR
 714         tristate "CPUfreq driver for ARM Integrator CPUs"
 715         depends on ARCH_INTEGRATOR && CPU_FREQ
 716         default y
 717         help
 718           This enables the CPUfreq driver for ARM Integrator CPUs.
 719
 720           For details, take a look at <file:Documentation/cpu-freq>.
 721
 722           If in doubt, say Y.
 723
 724 endmenu
 725
 726 endif
 727
 728 menu "Floating point emulation"
 729
 730 comment "At least one emulation must be selected"
 731
 732 config FPE_NWFPE
 733         bool "NWFPE math emulation"
 734         depends on !AEABI || OABI_COMPAT
 735         ---help---
 736           Say Y to include the NWFPE floating point emulator in the kernel.
 737           This is necessary to run most binaries. Linux does not currently
 738           support floating point hardware so you need to say Y here even if
 739           your machine has an FPA or floating point co-processor podule.
 740
 741           You may say N here if you are going to load the Acorn FPEmulator
 742           early in the bootup.
 743
 744 config FPE_NWFPE_XP
 745         bool "Support extended precision"
 746         depends on FPE_NWFPE
 747         help
 748           Say Y to include 80-bit support in the kernel floating-point
 749           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 750           Note that gcc does not generate 80-bit operations by default,
 751           so in most cases this option only enlarges the size of the
 752           floating point emulator without any good reason.
 753
 754           You almost surely want to say N here.
 755
 756 config FPE_FASTFPE
 757         bool "FastFPE math emulation (EXPERIMENTAL)"
 758         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 759         ---help---
 760           Say Y here to include the FAST floating point emulator in the kernel.
 761           This is an experimental much faster emulator which now also has full
 762           precision for the mantissa.  It does not support any exceptions.
 763           It is very simple, and approximately 3-6 times faster than NWFPE.
 764
 765           It should be sufficient for most programs.  It may be not suitable
 766           for scientific calculations, but you have to check this for yourself.
 767           If you do not feel you need a faster FP emulation you should better
 768           choose NWFPE.
 769
 770 config VFP
 771         bool "VFP-format floating point maths"
 772         depends on CPU_V6 || CPU_ARM926T
 773         help
 774           Say Y to include VFP support code in the kernel. This is needed
 775           if your hardware includes a VFP unit.
 776
 777           Please see <file:Documentation/arm/VFP/release-notes.txt> for
 778           release notes and additional status information.
 779
 780           Say N if your target does not have VFP hardware.
 781
 782 endmenu
 783
 784 menu "Userspace binary formats"
 785
 786 source "fs/Kconfig.binfmt"
 787
 788 config ARTHUR
 789         tristate "RISC OS personality"
 790         depends on !AEABI
 791         help
 792           Say Y here to include the kernel code necessary if you want to run
 793           Acorn RISC OS/Arthur binaries under Linux. This code is still very
 794           experimental; if this sounds frightening, say N and sleep in peace.
 795           You can also say M here to compile this support as a module (which
 796           will be called arthur).
 797
 798 endmenu
 799
 800 menu "Power management options"
 801
 802 source "kernel/power/Kconfig"
 803
 804 config APM
 805         tristate "Advanced Power Management Emulation"
 806         ---help---
 807           APM is a BIOS specification for saving power using several different
 808           techniques. This is mostly useful for battery powered laptops with
 809           APM compliant BIOSes. If you say Y here, the system time will be
 810           reset after a RESUME operation, the /proc/apm device will provide
 811           battery status information, and user-space programs will receive
 812           notification of APM "events" (e.g. battery status change).
 813
 814           In order to use APM, you will need supporting software. For location
 815           and more information, read <file:Documentation/pm.txt> and the
 816           Battery Powered Linux mini-HOWTO, available from
 817           <http://www.tldp.org/docs.html#howto>.
 818
 819           This driver does not spin down disk drives (see the hdparm(8)
 820           manpage ("man 8 hdparm") for that), and it doesn't turn off
 821           VESA-compliant "green" monitors.
 822
 823           Generally, if you don't have a battery in your machine, there isn't
 824           much point in using this driver and you should say N. If you get
 825           random kernel OOPSes or reboots that don't seem to be related to
 826           anything, try disabling/enabling this option (or disabling/enabling
 827           APM in your BIOS).
 828
 829 endmenu
 830
 831 source "net/Kconfig"
 832
 833 menu "Device Drivers"
 834
 835 source "drivers/base/Kconfig"
 836
 837 source "drivers/connector/Kconfig"
 838
 839 if ALIGNMENT_TRAP
 840 source "drivers/mtd/Kconfig"
 841 endif
 842
 843 source "drivers/parport/Kconfig"
 844
 845 source "drivers/pnp/Kconfig"
 846
 847 source "drivers/block/Kconfig"
 848
 849 source "drivers/acorn/block/Kconfig"
 850
 851 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
 852         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
 853         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
 854         || ARCH_IXP23XX
 855 source "drivers/ide/Kconfig"
 856 endif
 857
 858 source "drivers/scsi/Kconfig"
 859
 860 source "drivers/md/Kconfig"
 861
 862 source "drivers/message/fusion/Kconfig"
 863
 864 source "drivers/ieee1394/Kconfig"
 865
 866 source "drivers/message/i2o/Kconfig"
 867
 868 source "drivers/net/Kconfig"
 869
 870 source "drivers/isdn/Kconfig"
 871
 872 # input before char - char/joystick depends on it. As does USB.
 873
 874 source "drivers/input/Kconfig"
 875
 876 source "drivers/char/Kconfig"
 877
 878 source "drivers/i2c/Kconfig"
 879
 880 source "drivers/spi/Kconfig"
 881
 882 source "drivers/w1/Kconfig"
 883
 884 source "drivers/hwmon/Kconfig"
 885
 886 #source "drivers/l3/Kconfig"
 887
 888 source "drivers/misc/Kconfig"
 889
 890 source "drivers/mfd/Kconfig"
 891
 892 source "drivers/leds/Kconfig"
 893
 894 source "drivers/media/Kconfig"
 895
 896 source "drivers/video/Kconfig"
 897
 898 source "sound/Kconfig"
 899
 900 source "drivers/usb/Kconfig"
 901
 902 source "drivers/mmc/Kconfig"
 903
 904 source "drivers/rtc/Kconfig"
 905
 906 endmenu
 907
 908 source "fs/Kconfig"
 909
 910 source "arch/arm/oprofile/Kconfig"
 911
 912 source "arch/arm/Kconfig.debug"
 913
 914 source "security/Kconfig"
 915
 916 source "crypto/Kconfig"
 917
 918 source "lib/Kconfig"