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_IXP4XX
 227         bool "IXP4xx-based"
 228         depends on MMU
 229         select GENERIC_TIME
 230         help
 231           Support for Intel's IXP4XX (XScale) family of processors.
 232
 233 config ARCH_IXP2000
 234         bool "IXP2400/2800-based"
 235         depends on MMU
 236         select PCI
 237         help
 238           Support for Intel's IXP2400/2800 (XScale) family of processors.
 239
 240 config ARCH_IXP23XX
 241         bool "IXP23XX-based"
 242         depends on MMU
 243         select PCI
 244         help
 245           Support for Intel's IXP23xx (XScale) family of processors.
 246
 247 config ARCH_L7200
 248         bool "LinkUp-L7200"
 249         select FIQ
 250         help
 251           Say Y here if you intend to run this kernel on a LinkUp Systems
 252           L7200 Software Development Board which uses an ARM720T processor.
 253           Information on this board can be obtained at:
 254
 255           <http://www.linkupsys.com/>
 256
 257           If you have any questions or comments about the Linux kernel port
 258           to this board, send e-mail to <sjhill@cotw.com>.
 259
 260 config ARCH_PNX4008
 261         bool "Philips Nexperia PNX4008 Mobile"
 262         help
 263           This enables support for Philips PNX4008 mobile platform.
 264
 265 config ARCH_PXA
 266         bool "PXA2xx-based"
 267         depends on MMU
 268         select ARCH_MTD_XIP
 269         help
 270           Support for Intel's PXA2XX processor line.
 271
 272 config ARCH_RPC
 273         bool "RiscPC"
 274         select ARCH_ACORN
 275         select FIQ
 276         select TIMER_ACORN
 277         select ARCH_MAY_HAVE_PC_FDC
 278         select ISA_DMA_API
 279         help
 280           On the Acorn Risc-PC, Linux can support the internal IDE disk and
 281           CD-ROM interface, serial and parallel port, and the floppy drive.
 282
 283 config ARCH_SA1100
 284         bool "SA1100-based"
 285         select ISA
 286         select ARCH_DISCONTIGMEM_ENABLE
 287         select ARCH_MTD_XIP
 288         help
 289           Support for StrongARM 11x0 based boards.
 290
 291 config ARCH_S3C2410
 292         bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
 293         help
 294           Samsung S3C2410X CPU based systems, such as the Simtec Electronics
 295           BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
 296           the Samsung SMDK2410 development board (and derivatives).
 297
 298 config ARCH_SHARK
 299         bool "Shark"
 300         select ISA
 301         select ISA_DMA
 302         select PCI
 303         help
 304           Support for the StrongARM based Digital DNARD machine, also known
 305           as "Shark" (<http://www.shark-linux.de/shark.html>).
 306
 307 config ARCH_LH7A40X
 308         bool "Sharp LH7A40X"
 309         help
 310           Say Y here for systems based on one of the Sharp LH7A40X
 311           System on a Chip processors.  These CPUs include an ARM922T
 312           core with a wide array of integrated devices for
 313           hand-held and low-power applications.
 314
 315 config ARCH_OMAP
 316         bool "TI OMAP"
 317         help
 318           Support for TI's OMAP platform (OMAP1 and OMAP2).
 319
 320 endchoice
 321
 322 source "arch/arm/mach-clps711x/Kconfig"
 323
 324 source "arch/arm/mach-ep93xx/Kconfig"
 325
 326 source "arch/arm/mach-footbridge/Kconfig"
 327
 328 source "arch/arm/mach-integrator/Kconfig"
 329
 330 source "arch/arm/mach-iop32x/Kconfig"
 331
 332 source "arch/arm/mach-iop33x/Kconfig"
 333
 334 source "arch/arm/mach-ixp4xx/Kconfig"
 335
 336 source "arch/arm/mach-ixp2000/Kconfig"
 337
 338 source "arch/arm/mach-ixp23xx/Kconfig"
 339
 340 source "arch/arm/mach-pxa/Kconfig"
 341
 342 source "arch/arm/mach-sa1100/Kconfig"
 343
 344 source "arch/arm/plat-omap/Kconfig"
 345
 346 source "arch/arm/mach-omap1/Kconfig"
 347
 348 source "arch/arm/mach-omap2/Kconfig"
 349
 350 source "arch/arm/mach-s3c2410/Kconfig"
 351
 352 source "arch/arm/mach-lh7a40x/Kconfig"
 353
 354 source "arch/arm/mach-imx/Kconfig"
 355
 356 source "arch/arm/mach-h720x/Kconfig"
 357
 358 source "arch/arm/mach-versatile/Kconfig"
 359
 360 source "arch/arm/mach-aaec2000/Kconfig"
 361
 362 source "arch/arm/mach-realview/Kconfig"
 363
 364 source "arch/arm/mach-at91rm9200/Kconfig"
 365
 366 source "arch/arm/mach-netx/Kconfig"
 367
 368 # Definitions to make life easier
 369 config ARCH_ACORN
 370         bool
 371
 372 config PLAT_IOP
 373         bool
 374
 375 source arch/arm/mm/Kconfig
 376
 377 #  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
 378 config XSCALE_PMU
 379         bool
 380         depends on CPU_XSCALE && !XSCALE_PMU_TIMER
 381         default y
 382
 383 if !MMU
 384 source "arch/arm/Kconfig-nommu"
 385 endif
 386
 387 endmenu
 388
 389 source "arch/arm/common/Kconfig"
 390
 391 config FORCE_MAX_ZONEORDER
 392         int
 393         depends on SA1111
 394         default "9"
 395
 396 menu "Bus support"
 397
 398 config ARM_AMBA
 399         bool
 400
 401 config ISA
 402         bool
 403         help
 404           Find out whether you have ISA slots on your motherboard.  ISA is the
 405           name of a bus system, i.e. the way the CPU talks to the other stuff
 406           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 407           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 408           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 409
 410 # Select ISA DMA controller support
 411 config ISA_DMA
 412         bool
 413         select ISA_DMA_API
 414
 415 # Select ISA DMA interface
 416 config ISA_DMA_API
 417         bool
 418
 419 config PCI
 420         bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
 421         help
 422           Find out whether you have a PCI motherboard. PCI is the name of a
 423           bus system, i.e. the way the CPU talks to the other stuff inside
 424           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 425           VESA. If you have PCI, say Y, otherwise N.
 426
 427           The PCI-HOWTO, available from
 428           <http://www.tldp.org/docs.html#howto>, contains valuable
 429           information about which PCI hardware does work under Linux and which
 430           doesn't.
 431
 432 # Select the host bridge type
 433 config PCI_HOST_VIA82C505
 434         bool
 435         depends on PCI && ARCH_SHARK
 436         default y
 437
 438 source "drivers/pci/Kconfig"
 439
 440 source "drivers/pcmcia/Kconfig"
 441
 442 endmenu
 443
 444 menu "Kernel Features"
 445
 446 config SMP
 447         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 448         depends on EXPERIMENTAL && REALVIEW_MPCORE
 449         help
 450           This enables support for systems with more than one CPU. If you have
 451           a system with only one CPU, like most personal computers, say N. If
 452           you have a system with more than one CPU, say Y.
 453
 454           If you say N here, the kernel will run on single and multiprocessor
 455           machines, but will use only one CPU of a multiprocessor machine. If
 456           you say Y here, the kernel will run on many, but not all, single
 457           processor machines. On a single processor machine, the kernel will
 458           run faster if you say N here.
 459
 460           See also the <file:Documentation/smp.txt>,
 461           <file:Documentation/i386/IO-APIC.txt>,
 462           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 463           <http://www.linuxdoc.org/docs.html#howto>.
 464
 465           If you don't know what to do here, say N.
 466
 467 config NR_CPUS
 468         int "Maximum number of CPUs (2-32)"
 469         range 2 32
 470         depends on SMP
 471         default "4"
 472
 473 config HOTPLUG_CPU
 474         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 475         depends on SMP && HOTPLUG && EXPERIMENTAL
 476         help
 477           Say Y here to experiment with turning CPUs off and on.  CPUs
 478           can be controlled through /sys/devices/system/cpu.
 479
 480 config LOCAL_TIMERS
 481         bool "Use local timer interrupts"
 482         depends on SMP && REALVIEW_MPCORE
 483         default y
 484         help
 485           Enable support for local timers on SMP platforms, rather then the
 486           legacy IPI broadcast method.  Local timers allows the system
 487           accounting to be spread across the timer interval, preventing a
 488           "thundering herd" at every timer tick.
 489
 490 config PREEMPT
 491         bool "Preemptible Kernel (EXPERIMENTAL)"
 492         depends on EXPERIMENTAL
 493         help
 494           This option reduces the latency of the kernel when reacting to
 495           real-time or interactive events by allowing a low priority process to
 496           be preempted even if it is in kernel mode executing a system call.
 497           This allows applications to run more reliably even when the system is
 498           under load.
 499
 500           Say Y here if you are building a kernel for a desktop, embedded
 501           or real-time system.  Say N if you are unsure.
 502
 503 config NO_IDLE_HZ
 504         bool "Dynamic tick timer"
 505         help
 506           Select this option if you want to disable continuous timer ticks
 507           and have them programmed to occur as required. This option saves
 508           power as the system can remain in idle state for longer.
 509
 510           By default dynamic tick is disabled during the boot, and can be
 511           manually enabled with:
 512
 513             echo 1 > /sys/devices/system/timer/timer0/dyn_tick
 514
 515           Alternatively, if you want dynamic tick automatically enabled
 516           during boot, pass "dyntick=enable" via the kernel command string.
 517
 518           Please note that dynamic tick may affect the accuracy of
 519           timekeeping on some platforms depending on the implementation.
 520           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
 521           to have accurate timekeeping with dynamic tick.
 522
 523 config HZ
 524         int
 525         default 128 if ARCH_L7200
 526         default 200 if ARCH_EBSA110 || ARCH_S3C2410
 527         default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
 528         default 100
 529
 530 config AEABI
 531         bool "Use the ARM EABI to compile the kernel"
 532         help
 533           This option allows for the kernel to be compiled using the latest
 534           ARM ABI (aka EABI).  This is only useful if you are using a user
 535           space environment that is also compiled with EABI.
 536
 537           Since there are major incompatibilities between the legacy ABI and
 538           EABI, especially with regard to structure member alignment, this
 539           option also changes the kernel syscall calling convention to
 540           disambiguate both ABIs and allow for backward compatibility support
 541           (selected with CONFIG_OABI_COMPAT).
 542
 543           To use this you need GCC version 4.0.0 or later.
 544
 545 config OABI_COMPAT
 546         bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 547         depends on AEABI && EXPERIMENTAL
 548         default y
 549         help
 550           This option preserves the old syscall interface along with the
 551           new (ARM EABI) one. It also provides a compatibility layer to
 552           intercept syscalls that have structure arguments which layout
 553           in memory differs between the legacy ABI and the new ARM EABI
 554           (only for non "thumb" binaries). This option adds a tiny
 555           overhead to all syscalls and produces a slightly larger kernel.
 556           If you know you'll be using only pure EABI user space then you
 557           can say N here. If this option is not selected and you attempt
 558           to execute a legacy ABI binary then the result will be
 559           UNPREDICTABLE (in fact it can be predicted that it won't work
 560           at all). If in doubt say Y.
 561
 562 config ARCH_DISCONTIGMEM_ENABLE
 563         bool
 564         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
 565         help
 566           Say Y to support efficient handling of discontiguous physical memory,
 567           for architectures which are either NUMA (Non-Uniform Memory Access)
 568           or have huge holes in the physical address space for other reasons.
 569           See <file:Documentation/vm/numa> for more.
 570
 571 config NODES_SHIFT
 572         int
 573         default "4" if ARCH_LH7A40X
 574         default "2"
 575         depends on NEED_MULTIPLE_NODES
 576
 577 source "mm/Kconfig"
 578
 579 config LEDS
 580         bool "Timer and CPU usage LEDs"
 581         depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
 582                    ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
 583                    ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
 584                    ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
 585                    ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
 586                    ARCH_AT91RM9200 || MACH_TRIZEPS4
 587         help
 588           If you say Y here, the LEDs on your machine will be used
 589           to provide useful information about your current system status.
 590
 591           If you are compiling a kernel for a NetWinder or EBSA-285, you will
 592           be able to select which LEDs are active using the options below. If
 593           you are compiling a kernel for the EBSA-110 or the LART however, the
 594           red LED will simply flash regularly to indicate that the system is
 595           still functional. It is safe to say Y here if you have a CATS
 596           system, but the driver will do nothing.
 597
 598 config LEDS_TIMER
 599         bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
 600                             MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 601         depends on LEDS
 602         default y if ARCH_EBSA110
 603         help
 604           If you say Y here, one of the system LEDs (the green one on the
 605           NetWinder, the amber one on the EBSA285, or the red one on the LART)
 606           will flash regularly to indicate that the system is still
 607           operational. This is mainly useful to kernel hackers who are
 608           debugging unstable kernels.
 609
 610           The LART uses the same LED for both Timer LED and CPU usage LED
 611           functions. You may choose to use both, but the Timer LED function
 612           will overrule the CPU usage LED.
 613
 614 config LEDS_CPU
 615         bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
 616                         !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
 617         depends on LEDS
 618         help
 619           If you say Y here, the red LED will be used to give a good real
 620           time indication of CPU usage, by lighting whenever the idle task
 621           is not currently executing.
 622
 623           The LART uses the same LED for both Timer LED and CPU usage LED
 624           functions. You may choose to use both, but the Timer LED function
 625           will overrule the CPU usage LED.
 626
 627 config ALIGNMENT_TRAP
 628         bool
 629         depends on CPU_CP15_MMU
 630         default y if !ARCH_EBSA110
 631         help
 632           ARM processors can not fetch/store information which is not
 633           naturally aligned on the bus, i.e., a 4 byte fetch must start at an
 634           address divisible by 4. On 32-bit ARM processors, these non-aligned
 635           fetch/store instructions will be emulated in software if you say
 636           here, which has a severe performance impact. This is necessary for
 637           correct operation of some network protocols. With an IP-only
 638           configuration it is safe to say N, otherwise say Y.
 639
 640 endmenu
 641
 642 menu "Boot options"
 643
 644 # Compressed boot loader in ROM.  Yes, we really want to ask about
 645 # TEXT and BSS so we preserve their values in the config files.
 646 config ZBOOT_ROM_TEXT
 647         hex "Compressed ROM boot loader base address"
 648         default "0"
 649         help
 650           The physical address at which the ROM-able zImage is to be
 651           placed in the target.  Platforms which normally make use of
 652           ROM-able zImage formats normally set this to a suitable
 653           value in their defconfig file.
 654
 655           If ZBOOT_ROM is not enabled, this has no effect.
 656
 657 config ZBOOT_ROM_BSS
 658         hex "Compressed ROM boot loader BSS address"
 659         default "0"
 660         help
 661           The base address of an area of read/write memory in the target
 662           for the ROM-able zImage which must be available while the
 663           decompressor is running. It must be large enough to hold the
 664           entire decompressed kernel plus an additional 128 KiB.
 665           Platforms which normally make use of ROM-able zImage formats
 666           normally set this to a suitable value in their defconfig file.
 667
 668           If ZBOOT_ROM is not enabled, this has no effect.
 669
 670 config ZBOOT_ROM
 671         bool "Compressed boot loader in ROM/flash"
 672         depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
 673         help
 674           Say Y here if you intend to execute your compressed kernel image
 675           (zImage) directly from ROM or flash.  If unsure, say N.
 676
 677 config CMDLINE
 678         string "Default kernel command string"
 679         default ""
 680         help
 681           On some architectures (EBSA110 and CATS), there is currently no way
 682           for the boot loader to pass arguments to the kernel. For these
 683           architectures, you should supply some command-line options at build
 684           time by entering them here. As a minimum, you should specify the
 685           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 686
 687 config XIP_KERNEL
 688         bool "Kernel Execute-In-Place from ROM"
 689         depends on !ZBOOT_ROM
 690         help
 691           Execute-In-Place allows the kernel to run from non-volatile storage
 692           directly addressable by the CPU, such as NOR flash. This saves RAM
 693           space since the text section of the kernel is not loaded from flash
 694           to RAM.  Read-write sections, such as the data section and stack,
 695           are still copied to RAM.  The XIP kernel is not compressed since
 696           it has to run directly from flash, so it will take more space to
 697           store it.  The flash address used to link the kernel object files,
 698           and for storing it, is configuration dependent. Therefore, if you
 699           say Y here, you must know the proper physical address where to
 700           store the kernel image depending on your own flash memory usage.
 701
 702           Also note that the make target becomes "make xipImage" rather than
 703           "make zImage" or "make Image".  The final kernel binary to put in
 704           ROM memory will be arch/arm/boot/xipImage.
 705
 706           If unsure, say N.
 707
 708 config XIP_PHYS_ADDR
 709         hex "XIP Kernel Physical Location"
 710         depends on XIP_KERNEL
 711         default "0x00080000"
 712         help
 713           This is the physical address in your flash memory the kernel will
 714           be linked for and stored to.  This address is dependent on your
 715           own flash usage.
 716
 717 endmenu
 718
 719 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP)
 720
 721 menu "CPU Frequency scaling"
 722
 723 source "drivers/cpufreq/Kconfig"
 724
 725 config CPU_FREQ_SA1100
 726         bool
 727         depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
 728         default y
 729
 730 config CPU_FREQ_SA1110
 731         bool
 732         depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
 733         default y
 734
 735 config CPU_FREQ_INTEGRATOR
 736         tristate "CPUfreq driver for ARM Integrator CPUs"
 737         depends on ARCH_INTEGRATOR && CPU_FREQ
 738         default y
 739         help
 740           This enables the CPUfreq driver for ARM Integrator CPUs.
 741
 742           For details, take a look at <file:Documentation/cpu-freq>.
 743
 744           If in doubt, say Y.
 745
 746 endmenu
 747
 748 endif
 749
 750 menu "Floating point emulation"
 751
 752 comment "At least one emulation must be selected"
 753
 754 config FPE_NWFPE
 755         bool "NWFPE math emulation"
 756         depends on !AEABI || OABI_COMPAT
 757         ---help---
 758           Say Y to include the NWFPE floating point emulator in the kernel.
 759           This is necessary to run most binaries. Linux does not currently
 760           support floating point hardware so you need to say Y here even if
 761           your machine has an FPA or floating point co-processor podule.
 762
 763           You may say N here if you are going to load the Acorn FPEmulator
 764           early in the bootup.
 765
 766 config FPE_NWFPE_XP
 767         bool "Support extended precision"
 768         depends on FPE_NWFPE
 769         help
 770           Say Y to include 80-bit support in the kernel floating-point
 771           emulator.  Otherwise, only 32 and 64-bit support is compiled in.
 772           Note that gcc does not generate 80-bit operations by default,
 773           so in most cases this option only enlarges the size of the
 774           floating point emulator without any good reason.
 775
 776           You almost surely want to say N here.
 777
 778 config FPE_FASTFPE
 779         bool "FastFPE math emulation (EXPERIMENTAL)"
 780         depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
 781         ---help---
 782           Say Y here to include the FAST floating point emulator in the kernel.
 783           This is an experimental much faster emulator which now also has full
 784           precision for the mantissa.  It does not support any exceptions.
 785           It is very simple, and approximately 3-6 times faster than NWFPE.
 786
 787           It should be sufficient for most programs.  It may be not suitable
 788           for scientific calculations, but you have to check this for yourself.
 789           If you do not feel you need a faster FP emulation you should better
 790           choose NWFPE.
 791
 792 config VFP
 793         bool "VFP-format floating point maths"
 794         depends on CPU_V6 || CPU_ARM926T
 795         help
 796           Say Y to include VFP support code in the kernel. This is needed
 797           if your hardware includes a VFP unit.
 798
 799           Please see <file:Documentation/arm/VFP/release-notes.txt> for
 800           release notes and additional status information.
 801
 802           Say N if your target does not have VFP hardware.
 803
 804 endmenu
 805
 806 menu "Userspace binary formats"
 807
 808 source "fs/Kconfig.binfmt"
 809
 810 config ARTHUR
 811         tristate "RISC OS personality"
 812         depends on !AEABI
 813         help
 814           Say Y here to include the kernel code necessary if you want to run
 815           Acorn RISC OS/Arthur binaries under Linux. This code is still very
 816           experimental; if this sounds frightening, say N and sleep in peace.
 817           You can also say M here to compile this support as a module (which
 818           will be called arthur).
 819
 820 endmenu
 821
 822 menu "Power management options"
 823
 824 source "kernel/power/Kconfig"
 825
 826 config APM
 827         tristate "Advanced Power Management Emulation"
 828         ---help---
 829           APM is a BIOS specification for saving power using several different
 830           techniques. This is mostly useful for battery powered laptops with
 831           APM compliant BIOSes. If you say Y here, the system time will be
 832           reset after a RESUME operation, the /proc/apm device will provide
 833           battery status information, and user-space programs will receive
 834           notification of APM "events" (e.g. battery status change).
 835
 836           In order to use APM, you will need supporting software. For location
 837           and more information, read <file:Documentation/pm.txt> and the
 838           Battery Powered Linux mini-HOWTO, available from
 839           <http://www.tldp.org/docs.html#howto>.
 840
 841           This driver does not spin down disk drives (see the hdparm(8)
 842           manpage ("man 8 hdparm") for that), and it doesn't turn off
 843           VESA-compliant "green" monitors.
 844
 845           Generally, if you don't have a battery in your machine, there isn't
 846           much point in using this driver and you should say N. If you get
 847           random kernel OOPSes or reboots that don't seem to be related to
 848           anything, try disabling/enabling this option (or disabling/enabling
 849           APM in your BIOS).
 850
 851 endmenu
 852
 853 source "net/Kconfig"
 854
 855 menu "Device Drivers"
 856
 857 source "drivers/base/Kconfig"
 858
 859 source "drivers/connector/Kconfig"
 860
 861 if ALIGNMENT_TRAP || !CPU_CP15_MMU
 862 source "drivers/mtd/Kconfig"
 863 endif
 864
 865 source "drivers/parport/Kconfig"
 866
 867 source "drivers/pnp/Kconfig"
 868
 869 source "drivers/block/Kconfig"
 870
 871 source "drivers/acorn/block/Kconfig"
 872
 873 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
 874         || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
 875         || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
 876         || ARCH_IXP23XX
 877 source "drivers/ide/Kconfig"
 878 endif
 879
 880 source "drivers/scsi/Kconfig"
 881
 882 source "drivers/md/Kconfig"
 883
 884 source "drivers/message/fusion/Kconfig"
 885
 886 source "drivers/ieee1394/Kconfig"
 887
 888 source "drivers/message/i2o/Kconfig"
 889
 890 source "drivers/net/Kconfig"
 891
 892 source "drivers/isdn/Kconfig"
 893
 894 # input before char - char/joystick depends on it. As does USB.
 895
 896 source "drivers/input/Kconfig"
 897
 898 source "drivers/char/Kconfig"
 899
 900 source "drivers/i2c/Kconfig"
 901
 902 source "drivers/spi/Kconfig"
 903
 904 source "drivers/w1/Kconfig"
 905
 906 source "drivers/hwmon/Kconfig"
 907
 908 #source "drivers/l3/Kconfig"
 909
 910 source "drivers/misc/Kconfig"
 911
 912 source "drivers/mfd/Kconfig"
 913
 914 source "drivers/leds/Kconfig"
 915
 916 source "drivers/media/Kconfig"
 917
 918 source "drivers/video/Kconfig"
 919
 920 source "sound/Kconfig"
 921
 922 source "drivers/usb/Kconfig"
 923
 924 source "drivers/mmc/Kconfig"
 925
 926 source "drivers/rtc/Kconfig"
 927
 928 endmenu
 929
 930 source "fs/Kconfig"
 931
 932 source "arch/arm/oprofile/Kconfig"
 933
 934 source "arch/arm/Kconfig.debug"
 935
 936 source "security/Kconfig"
 937
 938 source "crypto/Kconfig"
 939
 940 source "lib/Kconfig"