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 GENERIC_TIME
  21         bool
  22         default n
  23
  24 config MMU
  25         bool
  26         default y
  27
  28 config EISA
  29         bool
  30         ---help---
  31           The Extended Industry Standard Architecture (EISA) bus was
  32           developed as an open alternative to the IBM MicroChannel bus.
  33
  34           The EISA bus provided some of the features of the IBM MicroChannel
  35           bus while maintaining backward compatibility with cards made for
  36           the older ISA bus.  The EISA bus saw limited use between 1988 and
  37           1995 when it was made obsolete by the PCI bus.
  38
  39           Say Y here if you are building a kernel for an EISA-based machine.
  40
  41           Otherwise, say N.
  42
  43 config SBUS
  44         bool
  45
  46 config MCA
  47         bool
  48         help
  49           MicroChannel Architecture is found in some IBM PS/2 machines and
  50           laptops.  It is a bus system similar to PCI or ISA. See
  51           <file:Documentation/mca.txt> (and especially the web page given
  52           there) before attempting to build an MCA bus kernel.
  53
  54 config GENERIC_HARDIRQS
  55         bool
  56         default y
  57
  58 config TRACE_IRQFLAGS_SUPPORT
  59         bool
  60         default y
  61
  62 config HARDIRQS_SW_RESEND
  63         bool
  64         default y
  65
  66 config GENERIC_IRQ_PROBE
  67         bool
  68         default y
  69
  70 config RWSEM_GENERIC_SPINLOCK
  71         bool
  72         default y
  73
  74 config RWSEM_XCHGADD_ALGORITHM
  75         bool
  76
  77 config GENERIC_HWEIGHT
  78         bool
  79         default y
  80
  81 config GENERIC_CALIBRATE_DELAY
  82         bool
  83         default y
  84
  85 config GENERIC_BUST_SPINLOCK
  86         bool
  87
  88 config ARCH_MAY_HAVE_PC_FDC
  89         bool
  90
  91 config GENERIC_ISA_DMA
  92         bool
  93
  94 config FIQ
  95         bool
  96
  97 config ARCH_MTD_XIP
  98         bool
  99
 100 config VECTORS_BASE
 101         hex
 102         default 0xffff0000 if MMU || CPU_HIGH_VECTOR
 103         default DRAM_BASE if REMAP_VECTORS_TO_RAM
 104         default 0x00000000
 105         help
 106           The base address of exception vectors.
 107
 108 source "init/Kconfig"
 109
 110 menu "System Type"
 111
 112 choice
 113         prompt "ARM system type"
 114         default ARCH_VERSATILE
 115
 116 config ARCH_AAEC2000
 117         bool "Agilent AAEC-2000 based"
 118         select ARM_AMBA
 119         help
 120           This enables support for systems based on the Agilent AAEC-2000
 121
 122 config ARCH_INTEGRATOR
 123         bool "ARM Ltd. Integrator family"
 124         select ARM_AMBA
 125         select ICST525
 126         help
 127           Support for ARM's Integrator platform.
 128
 129 config ARCH_REALVIEW
 130         bool "ARM Ltd. RealView family"
 131         select ARM_AMBA
 132         select ICST307
 133         help
 134           This enables support for ARM Ltd RealView boards.
 135
 136 config ARCH_VERSATILE
 137         bool "ARM Ltd. Versatile family"
 138         select ARM_AMBA
 139         select ARM_VIC
 140         select ICST307
 141         help
 142           This enables support for ARM Ltd Versatile board.
 143
 144 config ARCH_AT91
 145         bool "Atmel AT91"
 146         help
 147           This enables support for systems based on the Atmel AT91RM9200
 148           and AT91SAM9xxx processors.
 149
 150 config ARCH_CLPS7500
 151         bool "Cirrus CL-PS7500FE"
 152         select TIMER_ACORN
 153         select ISA
 154         help
 155           Support for the Cirrus Logic PS7500FE system-on-a-chip.
 156
 157 config ARCH_CLPS711X
 158         bool "Cirrus Logic CLPS711x/EP721x-based"
 159         help
 160           Support for Cirrus Logic 711x/721x based boards.
 161
 162 config ARCH_CO285
 163         bool "Co-EBSA285"
 164         select FOOTBRIDGE
 165         select FOOTBRIDGE_ADDIN
 166         help
 167           Support for Intel's EBSA285 companion chip.
 168
 169 config ARCH_EBSA110
 170         bool "EBSA-110"
 171         select ISA
 172         help
 173           This is an evaluation board for the StrongARM processor available
 174           from Digital. It has limited hardware on-board, including an
 175           Ethernet interface, two PCMCIA sockets, two serial ports and a
 176           parallel port.
 177
 178 config ARCH_EP93XX
 179         bool "EP93xx-based"
 180         select ARM_AMBA
 181         select ARM_VIC
 182         help
 183           This enables support for the Cirrus EP93xx series of CPUs.
 184
 185 config ARCH_FOOTBRIDGE
 186         bool "FootBridge"
 187         select FOOTBRIDGE
 188         help
 189           Support for systems based on the DC21285 companion chip
 190           ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 191
 192 config ARCH_NETX
 193         bool "Hilscher NetX based"
 194         select ARM_VIC
 195         help
 196           This enables support for systems based on the Hilscher NetX Soc
 197
 198 config ARCH_H720X
 199         bool "Hynix HMS720x-based"
 200         select ISA_DMA_API
 201         help
 202           This enables support for systems based on the Hynix HMS720x
 203
 204 config ARCH_IMX
 205         bool "IMX"
 206         help
 207           Support for Motorola's i.MX family of processors (MX1, MXL).
 208
 209 config ARCH_IOP32X
 210         bool "IOP32x-based"
 211         depends on MMU
 212         select PLAT_IOP
 213         select PCI
 214         help
 215           Support for Intel's 80219 and IOP32X (XScale) family of
 216           processors.
 217
 218 config ARCH_IOP33X
 219         bool "IOP33x-based"
 220         depends on MMU
 221         select PLAT_IOP
 222         select PCI
 223         help
 224           Support for Intel's IOP33X (XScale) family of processors.
 225
 226 config ARCH_IOP13XX
 227         bool "IOP13xx-based"
 228         select PCI
 229         help
 230           Support for Intel's IOP13XX (XScale) family of processors.
 231
 232 config ARCH_IXP4XX
 233         bool "IXP4xx-based"
 234         depends on MMU
 235         select GENERIC_TIME
 236         help
 237           Support for Intel's IXP4XX (XScale) family of processors.
 238
 239 config ARCH_IXP2000
 240         bool "IXP2400/2800-based"
 241         depends on MMU
 242         select PCI
 243         help
 244           Support for Intel's IXP2400/2800 (XScale) family of processors.
 245
 246 config ARCH_IXP23XX
 247         bool "IXP23XX-based"
 248         depends on MMU
 249         select PCI
 250         help
 251           Support for Intel's IXP23xx (XScale) family of processors.
 252
 253 config ARCH_L7200
 254         bool "LinkUp-L7200"
 255         select FIQ
 256         help
 257           Say Y here if you intend to run this kernel on a LinkUp Systems
 258           L7200 Software Development Board which uses an ARM720T processor.
 259           Information on this board can be obtained at:
 260
 261           <http://www.linkupsys.com/>
 262
 263           If you have any questions or comments about the Linux kernel port
 264           to this board, send e-mail to <sjhill@cotw.com>.
 265
 266 config ARCH_PNX4008
 267         bool "Philips Nexperia PNX4008 Mobile"
 268         help
 269           This enables support for Philips PNX4008 mobile platform.
 270
 271 config ARCH_PXA
 272         bool "PXA2xx-based"
 273         depends on MMU
 274         select ARCH_MTD_XIP
 275         help
 276           Support for Intel's PXA2XX processor line.
 277
 278 config ARCH_RPC
 279         bool "RiscPC"
 280         select ARCH_ACORN
 281         select FIQ
 282         select TIMER_ACORN
 283         select ARCH_MAY_HAVE_PC_FDC
 284         select ISA_DMA_API
 285         help
 286           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 287           CD-ROM interface, serial and parallel port, and the floppy drive.
 288
 289 config ARCH_SA1100
 290         bool "SA1100-based"
 291         select ISA
 292         select ARCH_DISCONTIGMEM_ENABLE
 293         select ARCH_MTD_XIP
 294         help
 295           Support for StrongARM 11x0 based boards.
 296
 297 config ARCH_S3C2410
 298         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
 299         help
 300           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 301           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 302           the Samsung SMDK2410 development board (and derivatives).
 303
 304 config ARCH_SHARK
 305         bool "Shark"
 306         select ISA
 307         select ISA_DMA
 308         select PCI
 309         help
 310           Support for the StrongARM based Digital DNARD machine, also known
 311           as "Shark" (<http://www.shark-linux.de/shark.html>).
 312
 313 config ARCH_LH7A40X
 314         bool "Sharp LH7A40X"
 315         help
 316           Say Y here for systems based on one of the Sharp LH7A40X
 317           System on a Chip processors.  These CPUs include an ARM922T
 318           core with a wide array of integrated devices for
 319           hand-held and low-power applications.
 320
 321 config ARCH_OMAP
 322         bool "TI OMAP"
 323         help
 324           Support for TI's OMAP platform (OMAP1 and OMAP2).
 325
 326 endchoice
 327
 328 source "arch/arm/mach-clps711x/Kconfig"
 329
 330 source "arch/arm/mach-ep93xx/Kconfig"
 331
 332 source "arch/arm/mach-footbridge/Kconfig"
 333
 334 source "arch/arm/mach-integrator/Kconfig"
 335
 336 source "arch/arm/mach-iop32x/Kconfig"
 337
 338 source "arch/arm/mach-iop33x/Kconfig"
 339
 340 source "arch/arm/mach-iop13xx/Kconfig"
 341
 342 source "arch/arm/mach-ixp4xx/Kconfig"
 343
 344 source "arch/arm/mach-ixp2000/Kconfig"
 345
 346 source "arch/arm/mach-ixp23xx/Kconfig"
 347
 348 source "arch/arm/mach-pxa/Kconfig"
 349
 350 source "arch/arm/mach-sa1100/Kconfig"
 351
 352 source "arch/arm/plat-omap/Kconfig"
 353
 354 source "arch/arm/mach-omap1/Kconfig"
 355
 356 source "arch/arm/mach-omap2/Kconfig"
 357
 358 source "arch/arm/mach-s3c2410/Kconfig"
 359
 360 source "arch/arm/mach-lh7a40x/Kconfig"
 361
 362 source "arch/arm/mach-imx/Kconfig"
 363
 364 source "arch/arm/mach-h720x/Kconfig"
 365
 366 source "arch/arm/mach-versatile/Kconfig"
 367
 368 source "arch/arm/mach-aaec2000/Kconfig"
 369
 370 source "arch/arm/mach-realview/Kconfig"
 371
 372 source "arch/arm/mach-at91rm9200/Kconfig"
 373
 374 source "arch/arm/mach-netx/Kconfig"
 375
 376 # Definitions to make life easier
 377 config ARCH_ACORN
 378         bool
 379
 380 config PLAT_IOP
 381         bool
 382
 383 source arch/arm/mm/Kconfig
 384
 385 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 386 config XSCALE_PMU
 387         bool
 388         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 389         default y
 390
 391 if !MMU
 392 source "arch/arm/Kconfig-nommu"
 393 endif
 394
 395 endmenu
 396
 397 source "arch/arm/common/Kconfig"
 398
 399 config FORCE_MAX_ZONEORDER
 400         int
 401         depends on SA1111
 402         default "9"
 403
 404 menu "Bus support"
 405
 406 config ARM_AMBA
 407         bool
 408
 409 config ISA
 410         bool
 411         help
 412           Find out whether you have ISA slots on your motherboard.  ISA is the
 413           name of a bus system, i.e. the way the CPU talks to the other stuff
 414           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 415           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 416           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 417
 418 # Select ISA DMA controller support
 419 config ISA_DMA
 420         bool
 421         select ISA_DMA_API
 422
 423 # Select ISA DMA interface
 424 config ISA_DMA_API
 425         bool
 426
 427 config PCI
 428         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
 429         help
 430           Find out whether you have a PCI motherboard. PCI is the name of a
 431           bus system, i.e. the way the CPU talks to the other stuff inside
 432           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 433           VESA. If you have PCI, say Y, otherwise N.
 434
 435           The PCI-HOWTO, available from
 436           <http://www.tldp.org/docs.html#howto>, contains valuable
 437           information about which PCI hardware does work under Linux and which
 438           doesn't.
 439
 440 # Select the host bridge type
 441 config PCI_HOST_VIA82C505
 442         bool
 443         depends on PCI && ARCH_SHARK
 444         default y
 445
 446 source "drivers/pci/Kconfig"
 447
 448 source "drivers/pcmcia/Kconfig"
 449
 450 endmenu
 451
 452 menu "Kernel Features"
 453
 454 config SMP
 455         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 456         depends on EXPERIMENTAL && REALVIEW_MPCORE
 457         help
 458           This enables support for systems with more than one CPU. If you have
 459           a system with only one CPU, like most personal computers, say N. If
 460           you have a system with more than one CPU, say Y.
 461
 462           If you say N here, the kernel will run on single and multiprocessor
 463           machines, but will use only one CPU of a multiprocessor machine. If
 464           you say Y here, the kernel will run on many, but not all, single
 465           processor machines. On a single processor machine, the kernel will
 466           run faster if you say N here.
 467
 468           See also the <file:Documentation/smp.txt>,
 469           <file:Documentation/i386/IO-APIC.txt>,
 470           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 471           <http://www.linuxdoc.org/docs.html#howto>.
 472
 473           If you don't know what to do here, say N.
 474
 475 config NR_CPUS
 476         int "Maximum number of CPUs (2-32)"
 477         range 2 32
 478         depends on SMP
 479         default "4"
 480
 481 config HOTPLUG_CPU
 482         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 483         depends on SMP && HOTPLUG && EXPERIMENTAL
 484         help
 485           Say Y here to experiment with turning CPUs off and on.  CPUs
 486           can be controlled through /sys/devices/system/cpu.
 487
 488 config LOCAL_TIMERS
 489         bool "Use local timer interrupts"
 490         depends on SMP && REALVIEW_MPCORE
 491         default y
 492         help
 493           Enable support for local timers on SMP platforms, rather then the
 494           legacy IPI broadcast method.  Local timers allows the system
 495           accounting to be spread across the timer interval, preventing a
 496           "thundering herd" at every timer tick.
 497
 498 config PREEMPT
 499         bool "Preemptible Kernel (EXPERIMENTAL)"
 500         depends on EXPERIMENTAL
 501         help
 502           This option reduces the latency of the kernel when reacting to
 503           real-time or interactive events by allowing a low priority process to
 504           be preempted even if it is in kernel mode executing a system call.
 505           This allows applications to run more reliably even when the system is
 506           under load.
 507
 508           Say Y here if you are building a kernel for a desktop, embedded
 509           or real-time system.  Say N if you are unsure.
 510
 511 config NO_IDLE_HZ
 512         bool "Dynamic tick timer"
 513         help
 514           Select this option if you want to disable continuous timer ticks
 515           and have them programmed to occur as required. This option saves
 516           power as the system can remain in idle state for longer.
 517
 518           By default dynamic tick is disabled during the boot, and can be
 519           manually enabled with:
 520
 521             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 522
 523           Alternatively, if you want dynamic tick automatically enabled
 524           during boot, pass "dyntick=enable" via the kernel command string.
 525
 526           Please note that dynamic tick may affect the accuracy of
 527           timekeeping on some platforms depending on the implementation.
 528           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 529           to have accurate timekeeping with dynamic tick.
 530
 531 config HZ
 532         int
 533         default 128 if ARCH_L7200
 534         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 535         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 536         default 100
 537
 538 config AEABI
 539         bool "Use the ARM EABI to compile the kernel"
 540         help
 541           This option allows for the kernel to be compiled using the latest
 542           ARM ABI (aka EABI).  This is only useful if you are using a user
 543           space environment that is also compiled with EABI.
 544
 545           Since there are major incompatibilities between the legacy ABI and
 546           EABI, especially with regard to structure member alignment, this
 547           option also changes the kernel syscall calling convention to
 548           disambiguate both ABIs and allow for backward compatibility support
 549           (selected with CONFIG_OABI_COMPAT).
 550
 551           To use this you need GCC version 4.0.0 or later.
 552
 553 config OABI_COMPAT
 554         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 555         depends on AEABI && EXPERIMENTAL
 556         default y
 557         help
 558           This option preserves the old syscall interface along with the
 559           new (ARM EABI) one. It also provides a compatibility layer to
 560           intercept syscalls that have structure arguments which layout
 561           in memory differs between the legacy ABI and the new ARM EABI
 562           (only for non "thumb" binaries). This option adds a tiny
 563           overhead to all syscalls and produces a slightly larger kernel.
 564           If you know you'll be using only pure EABI user space then you
 565           can say N here. If this option is not selected and you attempt
 566           to execute a legacy ABI binary then the result will be
 567           UNPREDICTABLE (in fact it can be predicted that it won't work
 568           at all). If in doubt say Y.
 569
 570 config ARCH_DISCONTIGMEM_ENABLE
 571         bool
 572         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 573         help
 574           Say Y to support efficient handling of discontiguous physical memory,
 575           for architectures which are either NUMA (Non-Uniform Memory Access)
 576           or have huge holes in the physical address space for other reasons.
 577           See <file:Documentation/vm/numa> for more.
 578
 579 config NODES_SHIFT
 580         int
 581         default "4" if ARCH_LH7A40X
 582         default "2"
 583         depends on NEED_MULTIPLE_NODES
 584
 585 source "mm/Kconfig"
 586
 587 config LEDS
 588         bool "Timer and CPU usage LEDs"
 589         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 590                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 591                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 592                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 593                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 594                    ARCH_AT91RM9200 || MACH_TRIZEPS4
 595         help
 596           If you say Y here, the LEDs on your machine will be used
 597           to provide useful information about your current system status.
 598
 599           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 600           be able to select which LEDs are active using the options below. If
 601           you are compiling a kernel for the EBSA-110 or the LART however, the
 602           red LED will simply flash regularly to indicate that the system is
 603           still functional. It is safe to say Y here if you have a CATS
 604           system, but the driver will do nothing.
 605
 606 config LEDS_TIMER
 607         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 608                             MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 609         depends on LEDS
 610         default y if ARCH_EBSA110
 611         help
 612           If you say Y here, one of the system LEDs (the green one on the
 613           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 614           will flash regularly to indicate that the system is still
 615           operational. This is mainly useful to kernel hackers who are
 616           debugging unstable kernels.
 617
 618           The LART uses the same LED for both Timer LED and CPU usage LED
 619           functions. You may choose to use both, but the Timer LED function
 620           will overrule the CPU usage LED.
 621
 622 config LEDS_CPU
 623         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 624                         !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 625         depends on LEDS
 626         help
 627           If you say Y here, the red LED will be used to give a good real
 628           time indication of CPU usage, by lighting whenever the idle task
 629           is not currently executing.
 630
 631           The LART uses the same LED for both Timer LED and CPU usage LED
 632           functions. You may choose to use both, but the Timer LED function
 633           will overrule the CPU usage LED.
 634
 635 config ALIGNMENT_TRAP
 636         bool
 637         depends on CPU_CP15_MMU
 638         default y if !ARCH_EBSA110
 639         help
 640           ARM processors cannot fetch/store information which is not
 641           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 642           address divisible by 4. On 32-bit ARM processors, these non-aligned
 643           fetch/store instructions will be emulated in software if you say
 644           here, which has a severe performance impact. This is necessary for
 645           correct operation of some network protocols. With an IP-only
 646           configuration it is safe to say N, otherwise say Y.
 647
 648 endmenu
 649
 650 menu "Boot options"
 651
 652 # Compressed boot loader in ROM.  Yes, we really want to ask about
 653 # TEXT and BSS so we preserve their values in the config files.
 654 config ZBOOT_ROM_TEXT
 655         hex "Compressed ROM boot loader base address"
 656         default "0"
 657         help
 658           The physical address at which the ROM-able zImage is to be
 659           placed in the target.  Platforms which normally make use of
 660           ROM-able zImage formats normally set this to a suitable
 661           value in their defconfig file.
 662
 663           If ZBOOT_ROM is not enabled, this has no effect.
 664
 665 config ZBOOT_ROM_BSS
 666         hex "Compressed ROM boot loader BSS address"
 667         default "0"
 668         help
 669           The base address of an area of read/write memory in the target
 670           for the ROM-able zImage which must be available while the
 671           decompressor is running. It must be large enough to hold the
 672           entire decompressed kernel plus an additional 128 KiB.
 673           Platforms which normally make use of ROM-able zImage formats
 674           normally set this to a suitable value in their defconfig file.
 675
 676           If ZBOOT_ROM is not enabled, this has no effect.
 677
 678 config ZBOOT_ROM
 679         bool "Compressed boot loader in ROM/flash"
 680         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 681         help
 682           Say Y here if you intend to execute your compressed kernel image
 683           (zImage) directly from ROM or flash.  If unsure, say N.
 684
 685 config CMDLINE
 686         string "Default kernel command string"
 687         default ""
 688         help
 689           On some architectures (EBSA110 and CATS), there is currently no way
 690           for the boot loader to pass arguments to the kernel. For these
 691           architectures, you should supply some command-line options at build
 692           time by entering them here. As a minimum, you should specify the
 693           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 694
 695 config XIP_KERNEL
 696         bool "Kernel Execute-In-Place from ROM"
 697         depends on !ZBOOT_ROM
 698         help
 699           Execute-In-Place allows the kernel to run from non-volatile storage
 700           directly addressable by the CPU, such as NOR flash. This saves RAM
 701           space since the text section of the kernel is not loaded from flash
 702           to RAM.  Read-write sections, such as the data section and stack,
 703           are still copied to RAM.  The XIP kernel is not compressed since
 704           it has to run directly from flash, so it will take more space to
 705           store it.  The flash address used to link the kernel object files,
 706           and for storing it, is configuration dependent. Therefore, if you
 707           say Y here, you must know the proper physical address where to
 708           store the kernel image depending on your own flash memory usage.
 709
 710           Also note that the make target becomes "make xipImage" rather than
 711           "make zImage" or "make Image".  The final kernel binary to put in
 712           ROM memory will be arch/arm/boot/xipImage.
 713
 714           If unsure, say N.
 715
 716 config XIP_PHYS_ADDR
 717         hex "XIP Kernel Physical Location"
 718         depends on XIP_KERNEL
 719         default "0x00080000"
 720         help
 721           This is the physical address in your flash memory the kernel will
 722           be linked for and stored to.  This address is dependent on your
 723           own flash usage.
 724
 725 endmenu
 726
 727 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP)
 728
 729 menu "CPU Frequency scaling"
 730
 731 source "drivers/cpufreq/Kconfig"
 732
 733 config CPU_FREQ_SA1100
 734         bool
 735         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 736         default y
 737
 738 config CPU_FREQ_SA1110
 739         bool
 740         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 741         default y
 742
 743 config CPU_FREQ_INTEGRATOR
 744         tristate "CPUfreq driver for ARM Integrator CPUs"
 745         depends on ARCH_INTEGRATOR && CPU_FREQ
 746         default y
 747         help
 748           This enables the CPUfreq driver for ARM Integrator CPUs.
 749
 750           For details, take a look at <file:Documentation/cpu-freq>.
 751
 752           If in doubt, say Y.
 753
 754 endmenu
 755
 756 endif
 757
 758 menu "Floating point emulation"
 759
 760 comment "At least one emulation must be selected"
 761
 762 config FPE_NWFPE
 763         bool "NWFPE math emulation"
 764         depends on !AEABI || OABI_COMPAT
 765         ---help---
 766           Say Y to include the NWFPE floating point emulator in the kernel.
 767           This is necessary to run most binaries. Linux does not currently
 768           support floating point hardware so you need to say Y here even if
 769           your machine has an FPA or floating point co-processor podule.
 770
 771           You may say N here if you are going to load the Acorn FPEmulator
 772           early in the bootup.
 773
 774 config FPE_NWFPE_XP
 775         bool "Support extended precision"
 776         depends on FPE_NWFPE
 777         help
 778           Say Y to include 80-bit support in the kernel floating-point
 779           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 780           Note that gcc does not generate 80-bit operations by default,
 781           so in most cases this option only enlarges the size of the
 782           floating point emulator without any good reason.
 783
 784           You almost surely want to say N here.
 785
 786 config FPE_FASTFPE
 787         bool "FastFPE math emulation (EXPERIMENTAL)"
 788         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 789         ---help---
 790           Say Y here to include the FAST floating point emulator in the kernel.
 791           This is an experimental much faster emulator which now also has full
 792           precision for the mantissa.  It does not support any exceptions.
 793           It is very simple, and approximately 3-6 times faster than NWFPE.
 794
 795           It should be sufficient for most programs.  It may be not suitable
 796           for scientific calculations, but you have to check this for yourself.
 797           If you do not feel you need a faster FP emulation you should better
 798           choose NWFPE.
 799
 800 config VFP
 801         bool "VFP-format floating point maths"
 802         depends on CPU_V6 || CPU_ARM926T
 803         help
 804           Say Y to include VFP support code in the kernel. This is needed
 805           if your hardware includes a VFP unit.
 806
 807           Please see <file:Documentation/arm/VFP/release-notes.txt> for
 808           release notes and additional status information.
 809
 810           Say N if your target does not have VFP hardware.
 811
 812 endmenu
 813
 814 menu "Userspace binary formats"
 815
 816 source "fs/Kconfig.binfmt"
 817
 818 config ARTHUR
 819         tristate "RISC OS personality"
 820         depends on !AEABI
 821         help
 822           Say Y here to include the kernel code necessary if you want to run
 823           Acorn RISC OS/Arthur binaries under Linux. This code is still very
 824           experimental; if this sounds frightening, say N and sleep in peace.
 825           You can also say M here to compile this support as a module (which
 826           will be called arthur).
 827
 828 endmenu
 829
 830 menu "Power management options"
 831
 832 source "kernel/power/Kconfig"
 833
 834 config APM
 835         tristate "Advanced Power Management Emulation"
 836         ---help---
 837           APM is a BIOS specification for saving power using several different
 838           techniques. This is mostly useful for battery powered laptops with
 839           APM compliant BIOSes. If you say Y here, the system time will be
 840           reset after a RESUME operation, the /proc/apm device will provide
 841           battery status information, and user-space programs will receive
 842           notification of APM "events" (e.g. battery status change).
 843
 844           In order to use APM, you will need supporting software. For location
 845           and more information, read <file:Documentation/pm.txt> and the
 846           Battery Powered Linux mini-HOWTO, available from
 847           <http://www.tldp.org/docs.html#howto>.
 848
 849           This driver does not spin down disk drives (see the hdparm(8)
 850           manpage ("man 8 hdparm") for that), and it doesn't turn off
 851           VESA-compliant "green" monitors.
 852
 853           Generally, if you don't have a battery in your machine, there isn't
 854           much point in using this driver and you should say N. If you get
 855           random kernel OOPSes or reboots that don't seem to be related to
 856           anything, try disabling/enabling this option (or disabling/enabling
 857           APM in your BIOS).
 858
 859 endmenu
 860
 861 source "net/Kconfig"
 862
 863 menu "Device Drivers"
 864
 865 source "drivers/base/Kconfig"
 866
 867 source "drivers/connector/Kconfig"
 868
 869 if ALIGNMENT_TRAP || !CPU_CP15_MMU
 870 source "drivers/mtd/Kconfig"
 871 endif
 872
 873 source "drivers/parport/Kconfig"
 874
 875 source "drivers/pnp/Kconfig"
 876
 877 source "drivers/block/Kconfig"
 878
 879 source "drivers/acorn/block/Kconfig"
 880
 881 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
 882         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
 883         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
 884         || ARCH_IXP23XX
 885 source "drivers/ide/Kconfig"
 886 endif
 887
 888 source "drivers/scsi/Kconfig"
 889
 890 source "drivers/ata/Kconfig"
 891
 892 source "drivers/md/Kconfig"
 893
 894 source "drivers/message/fusion/Kconfig"
 895
 896 source "drivers/ieee1394/Kconfig"
 897
 898 source "drivers/message/i2o/Kconfig"
 899
 900 source "drivers/net/Kconfig"
 901
 902 source "drivers/isdn/Kconfig"
 903
 904 # input before char - char/joystick depends on it. As does USB.
 905
 906 source "drivers/input/Kconfig"
 907
 908 source "drivers/char/Kconfig"
 909
 910 source "drivers/i2c/Kconfig"
 911
 912 source "drivers/spi/Kconfig"
 913
 914 source "drivers/w1/Kconfig"
 915
 916 source "drivers/hwmon/Kconfig"
 917
 918 #source "drivers/l3/Kconfig"
 919
 920 source "drivers/misc/Kconfig"
 921
 922 source "drivers/mfd/Kconfig"
 923
 924 source "drivers/leds/Kconfig"
 925
 926 source "drivers/media/Kconfig"
 927
 928 source "drivers/video/Kconfig"
 929
 930 source "sound/Kconfig"
 931
 932 source "drivers/usb/Kconfig"
 933
 934 source "drivers/mmc/Kconfig"
 935
 936 source "drivers/rtc/Kconfig"
 937
 938 endmenu
 939
 940 source "fs/Kconfig"
 941
 942 source "arch/arm/oprofile/Kconfig"
 943
 944 source "arch/arm/Kconfig.debug"
 945
 946 source "security/Kconfig"
 947
 948 source "crypto/Kconfig"
 949
 950 source "lib/Kconfig"