arch/alpha/Kconfig

   1 config ALPHA
   2         bool
   3         default y
   4         select ARCH_MIGHT_HAVE_PC_PARPORT
   5         select ARCH_MIGHT_HAVE_PC_SERIO
   6         select HAVE_AOUT
   7         select HAVE_IDE
   8         select HAVE_OPROFILE
   9         select HAVE_PCSPKR_PLATFORM
  10         select HAVE_PERF_EVENTS
  11         select HAVE_DMA_ATTRS
  12         select VIRT_TO_BUS
  13         select GENERIC_IRQ_PROBE
  14         select AUTO_IRQ_AFFINITY if SMP
  15         select GENERIC_IRQ_SHOW
  16         select ARCH_WANT_OPTIONAL_GPIOLIB
  17         select ARCH_WANT_IPC_PARSE_VERSION
  18         select ARCH_HAVE_NMI_SAFE_CMPXCHG
  19         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  20         select AUDIT_ARCH
  21         select GENERIC_CLOCKEVENTS
  22         select GENERIC_SMP_IDLE_THREAD
  23         select GENERIC_STRNCPY_FROM_USER
  24         select GENERIC_STRNLEN_USER
  25         select HAVE_ARCH_AUDITSYSCALL
  26         select HAVE_MOD_ARCH_SPECIFIC
  27         select MODULES_USE_ELF_RELA
  28         select ODD_RT_SIGACTION
  29         select OLD_SIGSUSPEND
  30         help
  31           The Alpha is a 64-bit general-purpose processor designed and
  32           marketed by the Digital Equipment Corporation of blessed memory,
  33           now Hewlett-Packard.  The Alpha Linux project has a home page at
  34           <http://www.alphalinux.org/>.
  35
  36 config 64BIT
  37         def_bool y
  38
  39 config MMU
  40         bool
  41         default y
  42
  43 config RWSEM_GENERIC_SPINLOCK
  44         bool
  45
  46 config RWSEM_XCHGADD_ALGORITHM
  47         bool
  48         default y
  49
  50 config ARCH_HAS_ILOG2_U32
  51         bool
  52         default n
  53
  54 config ARCH_HAS_ILOG2_U64
  55         bool
  56         default n
  57
  58 config GENERIC_CALIBRATE_DELAY
  59         bool
  60         default y
  61
  62 config ZONE_DMA
  63         bool
  64         default y
  65
  66 config ARCH_DMA_ADDR_T_64BIT
  67         def_bool y
  68
  69 config NEED_DMA_MAP_STATE
  70        def_bool y
  71
  72 config NEED_SG_DMA_LENGTH
  73         def_bool y
  74
  75 config GENERIC_ISA_DMA
  76         bool
  77         default y
  78
  79 source "init/Kconfig"
  80 source "kernel/Kconfig.freezer"
  81
  82 config AUDIT_ARCH
  83         bool
  84
  85 menu "System setup"
  86
  87 choice
  88         prompt "Alpha system type"
  89         default ALPHA_GENERIC
  90         ---help---
  91           This is the system type of your hardware.  A "generic" kernel will
  92           run on any supported Alpha system. However, if you configure a
  93           kernel for your specific system, it will be faster and smaller.
  94
  95           To find out what type of Alpha system you have, you may want to
  96           check out the Linux/Alpha FAQ, accessible on the WWW from
  97           <http://www.alphalinux.org/>. In summary:
  98
  99           Alcor/Alpha-XLT     AS 600, AS 500, XL-300, XL-366
 100           Alpha-XL            XL-233, XL-266
 101           AlphaBook1          Alpha laptop
 102           Avanti              AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
 103           Cabriolet           AlphaPC64, AlphaPCI64
 104           DP264               DP264 / DS20 / ES40 / DS10 / DS10L
 105           EB164               EB164 21164 evaluation board
 106           EB64+               EB64+ 21064 evaluation board
 107           EB66                EB66 21066 evaluation board
 108           EB66+               EB66+ 21066 evaluation board
 109           Jensen              DECpc 150, DEC 2000 models 300, 500
 110           LX164               AlphaPC164-LX
 111           Lynx                AS 2100A
 112           Miata               Personal Workstation 433/500/600 a/au
 113           Marvel              AlphaServer ES47 / ES80 / GS1280
 114           Mikasa              AS 1000
 115           Noname              AXPpci33, UDB (Multia)
 116           Noritake            AS 1000A, AS 600A, AS 800
 117           PC164               AlphaPC164
 118           Rawhide             AS 1200, AS 4000, AS 4100
 119           Ruffian             RPX164-2, AlphaPC164-UX, AlphaPC164-BX
 120           SX164               AlphaPC164-SX
 121           Sable               AS 2000, AS 2100
 122           Shark               DS 20L
 123           Takara              Takara (OEM)
 124           Titan               AlphaServer ES45 / DS25 / DS15
 125           Wildfire            AlphaServer GS 40/80/160/320
 126
 127           If you don't know what to do, choose "generic".
 128
 129 config ALPHA_GENERIC
 130         bool "Generic"
 131         depends on TTY
 132         help
 133           A generic kernel will run on all supported Alpha hardware.
 134
 135 config ALPHA_ALCOR
 136         bool "Alcor/Alpha-XLT"
 137         help
 138           For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
 139           slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
 140           Address, CIA) - a 383 pin plastic PGA).  It provides a DRAM
 141           controller (256-bit memory bus) and a PCI interface.  It also does
 142           all the work required to support an external Bcache and to maintain
 143           memory coherence when a PCI device DMAs into (or out of) memory.
 144
 145 config ALPHA_XL
 146         bool "Alpha-XL"
 147         help
 148           XL-233 and XL-266-based Alpha systems.
 149
 150 config ALPHA_BOOK1
 151         bool "AlphaBook1"
 152         help
 153           Dec AlphaBook1/Burns Alpha-based laptops.
 154
 155 config ALPHA_AVANTI_CH
 156         bool "Avanti"
 157
 158 config ALPHA_CABRIOLET
 159         bool "Cabriolet"
 160         help
 161           Cabriolet AlphaPC64, AlphaPCI64 systems.  Derived from EB64+ but now
 162           baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
 163           slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
 164           Bcache SIMMs.  Requires power supply with 3.3V output.
 165
 166 config ALPHA_DP264
 167         bool "DP264"
 168         help
 169           Various 21264 systems with the tsunami core logic chipset.
 170           API Networks: 264DP, UP2000(+), CS20;
 171           Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
 172
 173 config ALPHA_EB164
 174         bool "EB164"
 175         help
 176           EB164 21164 evaluation board from DEC.  Uses 21164 and ALCOR.  Has
 177           ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
 178           shared with an ISA slot) and 2 32-bit PCI slots.  Uses plus-in
 179           Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
 180           MOUSE (PS2 style), RTC/NVRAM.  Boot ROM is Flash.  PC-AT-sized
 181           motherboard.  Requires power supply with 3.3V output.
 182
 183 config ALPHA_EB64P_CH
 184         bool "EB64+"
 185
 186 config ALPHA_EB66
 187         bool "EB66"
 188         help
 189           A Digital DS group board.  Uses 21066 or 21066A.  I/O sub-system is
 190           identical to EB64+.  Baby PC-AT size.  Runs from standard PC power
 191           supply.  The EB66 schematic was published as a marketing poster
 192           advertising the 21066 as "the first microprocessor in the world with
 193           embedded PCI".
 194
 195 config ALPHA_EB66P
 196         bool "EB66+"
 197         help
 198           Later variant of the EB66 board.
 199
 200 config ALPHA_EIGER
 201         bool "Eiger"
 202         help
 203           Apparently an obscure OEM single-board computer based on the
 204           Typhoon/Tsunami chipset family. Information on it is scanty.
 205
 206 config ALPHA_JENSEN
 207         bool "Jensen"
 208         help
 209           DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
 210           of the first-generation Alpha systems. A number of these systems
 211           seem to be available on the second- hand market. The Jensen is a
 212           floor-standing tower system which originally used a 150MHz 21064 It
 213           used programmable logic to interface a 486 EISA I/O bridge to the
 214           CPU.
 215
 216 config ALPHA_LX164
 217         bool "LX164"
 218         help
 219           A technical overview of this board is available at
 220           <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
 221
 222 config ALPHA_LYNX
 223         bool "Lynx"
 224         help
 225           AlphaServer 2100A-based systems.
 226
 227 config ALPHA_MARVEL
 228         bool "Marvel"
 229         help
 230           AlphaServer ES47 / ES80 / GS1280 based on EV7.
 231
 232 config ALPHA_MIATA
 233         bool "Miata"
 234         help
 235           The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
 236           or 600au).
 237
 238 config ALPHA_MIKASA
 239         bool "Mikasa"
 240         help
 241           AlphaServer 1000-based Alpha systems.
 242
 243 config ALPHA_NAUTILUS
 244         bool "Nautilus"
 245         help
 246           Alpha systems based on the AMD 751 & ALI 1543C chipsets.
 247
 248 config ALPHA_NONAME_CH
 249         bool "Noname"
 250
 251 config ALPHA_NORITAKE
 252         bool "Noritake"
 253         help
 254           AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
 255           systems.
 256
 257 config ALPHA_PC164
 258         bool "PC164"
 259
 260 config ALPHA_P2K
 261         bool "Platform2000"
 262
 263 config ALPHA_RAWHIDE
 264         bool "Rawhide"
 265         help
 266           AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
 267           See HOWTO at
 268           <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
 269
 270 config ALPHA_RUFFIAN
 271         bool "Ruffian"
 272         help
 273           Samsung APC164UX.  There is a page on known problems and workarounds
 274           at <http://www.alphalinux.org/faq/FAQ-11.html>.
 275
 276 config ALPHA_RX164
 277         bool "RX164"
 278
 279 config ALPHA_SX164
 280         bool "SX164"
 281
 282 config ALPHA_SABLE
 283         bool "Sable"
 284         help
 285           Digital AlphaServer 2000 and 2100-based systems.
 286
 287 config ALPHA_SHARK
 288         bool "Shark"
 289
 290 config ALPHA_TAKARA
 291         bool "Takara"
 292         help
 293           Alpha 11164-based OEM single-board computer.
 294
 295 config ALPHA_TITAN
 296         bool "Titan"
 297         help
 298           AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
 299
 300 config ALPHA_WILDFIRE
 301         bool "Wildfire"
 302         help
 303           AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
 304
 305 endchoice
 306
 307 # clear all implied options (don't want default values for those):
 308 # Most of these machines have ISA slots; not exactly sure which don't,
 309 # and this doesn't activate hordes of code, so do it always.
 310 config ISA
 311         bool
 312         default y
 313         help
 314           Find out whether you have ISA slots on your motherboard.  ISA is the
 315           name of a bus system, i.e. the way the CPU talks to the other stuff
 316           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 317           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 318           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 319
 320 config ISA_DMA_API
 321         bool
 322         default y
 323
 324 config PCI
 325         bool
 326         depends on !ALPHA_JENSEN
 327         select GENERIC_PCI_IOMAP
 328         default y
 329         help
 330           Find out whether you have a PCI motherboard. PCI is the name of a
 331           bus system, i.e. the way the CPU talks to the other stuff inside
 332           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 333           VESA. If you have PCI, say Y, otherwise N.
 334
 335 config PCI_DOMAINS
 336         bool
 337         default y
 338
 339 config PCI_SYSCALL
 340         def_bool PCI
 341
 342 config IOMMU_HELPER
 343         def_bool PCI
 344
 345 config ALPHA_NONAME
 346         bool
 347         depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
 348         default y
 349         help
 350           The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
 351           UDB).  This design was produced by Digital's Technical OEM (TOEM)
 352           group. It uses the 21066 processor running at 166MHz or 233MHz. It
 353           is a baby-AT size, and runs from a standard PC power supply. It has
 354           5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
 355           2 versions, with either PS/2 or large DIN connectors for the
 356           keyboard.
 357
 358 config ALPHA_EV4
 359         bool
 360         depends on ALPHA_JENSEN || (ALPHA_SABLE && !ALPHA_GAMMA) || ALPHA_LYNX || ALPHA_NORITAKE && !ALPHA_PRIMO || ALPHA_MIKASA && !ALPHA_PRIMO || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL || ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
 361         default y if !ALPHA_LYNX
 362
 363 config ALPHA_LCA
 364         bool
 365         depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
 366         default y
 367
 368 config ALPHA_APECS
 369         bool
 370         depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
 371         default y
 372
 373 config ALPHA_EB64P
 374         bool
 375         depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
 376         default y
 377         help
 378           Uses 21064 or 21064A and APECs.  Has ISA and PCI expansion (3 ISA,
 379           2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
 380           ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
 381           (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
 382           SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM.  PC-AT size.
 383           Runs from standard PC power supply.
 384
 385 config ALPHA_EV5
 386         bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
 387         default y if ALPHA_RX164 || ALPHA_RAWHIDE || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_SABLE && ALPHA_GAMMA || ALPHA_NORITAKE && ALPHA_PRIMO || ALPHA_MIKASA && ALPHA_PRIMO || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR
 388
 389 config ALPHA_EV4
 390         bool
 391         default y if ALPHA_LYNX && !ALPHA_EV5
 392
 393 config ALPHA_CIA
 394         bool
 395         depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_NORITAKE && ALPHA_PRIMO || ALPHA_MIKASA && ALPHA_PRIMO || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR
 396         default y
 397
 398 config ALPHA_EV56
 399         bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
 400         default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
 401
 402 config ALPHA_EV56
 403         prompt "EV56 CPU (speed >= 333MHz)?"
 404         depends on ALPHA_NORITAKE || ALPHA_PRIMO
 405
 406 config ALPHA_EV56
 407         prompt "EV56 CPU (speed >= 400MHz)?"
 408         depends on ALPHA_RAWHIDE
 409
 410 config ALPHA_PRIMO
 411         bool "EV5 CPU daughtercard (model 5/xxx)?"
 412         depends on ALPHA_NORITAKE || ALPHA_MIKASA
 413         help
 414           Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
 415
 416 config ALPHA_GAMMA
 417         bool "EV5 CPU(s) (model 5/xxx)?"
 418         depends on ALPHA_SABLE
 419         help
 420           Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
 421
 422 config ALPHA_GAMMA
 423         bool
 424         depends on ALPHA_LYNX
 425         default y
 426
 427 config ALPHA_T2
 428         bool
 429         depends on ALPHA_SABLE || ALPHA_LYNX
 430         default y
 431
 432 config ALPHA_PYXIS
 433         bool
 434         depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
 435         default y
 436
 437 config ALPHA_EV6
 438         bool
 439         depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
 440         default y
 441
 442 config ALPHA_TSUNAMI
 443         bool
 444         depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
 445         default y
 446
 447 config ALPHA_EV67
 448         bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
 449         default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
 450         help
 451           Is this a machine based on the EV67 core?  If in doubt, select N here
 452           and the machine will be treated as an EV6.
 453
 454 config ALPHA_MCPCIA
 455         bool
 456         depends on ALPHA_RAWHIDE
 457         default y
 458
 459 config ALPHA_POLARIS
 460         bool
 461         depends on ALPHA_RX164
 462         default y
 463
 464 config ALPHA_IRONGATE
 465         bool
 466         depends on ALPHA_NAUTILUS
 467         default y
 468
 469 config GENERIC_HWEIGHT
 470         bool
 471         default y if !ALPHA_EV67
 472
 473 config ALPHA_AVANTI
 474         bool
 475         depends on ALPHA_XL || ALPHA_AVANTI_CH
 476         default y
 477         help
 478           Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
 479           Alphas. Info at
 480           <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
 481
 482 config ALPHA_BROKEN_IRQ_MASK
 483         bool
 484         depends on ALPHA_GENERIC || ALPHA_PC164
 485         default y
 486
 487 config VGA_HOSE
 488         bool
 489         depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
 490         default y
 491         help
 492           Support VGA on an arbitrary hose; needed for several platforms
 493           which always have multiple hoses, and whose consoles support it.
 494
 495
 496 config ALPHA_QEMU
 497         bool "Run under QEMU emulation"
 498         depends on !ALPHA_GENERIC
 499         ---help---
 500           Assume the presence of special features supported by QEMU PALcode
 501           that reduce the overhead of system emulation.
 502
 503           Generic kernels will auto-detect QEMU.  But when building a
 504           system-specific kernel, the assumption is that we want to
 505           elimiate as many runtime tests as possible.
 506
 507           If unsure, say N.
 508
 509
 510 config ALPHA_SRM
 511         bool "Use SRM as bootloader" if ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_NAUTILUS || ALPHA_NONAME
 512         depends on TTY
 513         default y if ALPHA_JENSEN || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_DP264 || ALPHA_RAWHIDE || ALPHA_EIGER || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
 514         ---help---
 515           There are two different types of booting firmware on Alphas: SRM,
 516           which is command line driven, and ARC, which uses menus and arrow
 517           keys. Details about the Linux/Alpha booting process are contained in
 518           the Linux/Alpha FAQ, accessible on the WWW from
 519           <http://www.alphalinux.org/>.
 520
 521           The usual way to load Linux on an Alpha machine is to use MILO
 522           (a bootloader that lets you pass command line parameters to the
 523           kernel just like lilo does for the x86 architecture) which can be
 524           loaded either from ARC or can be installed directly as a permanent
 525           firmware replacement from floppy (which requires changing a certain
 526           jumper on the motherboard). If you want to do either of these, say N
 527           here. If MILO doesn't work on your system (true for Jensen
 528           motherboards), you can bypass it altogether and boot Linux directly
 529           from an SRM console; say Y here in order to do that. Note that you
 530           won't be able to boot from an IDE disk using SRM.
 531
 532           If unsure, say N.
 533
 534 config EISA
 535         bool
 536         depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
 537         default y
 538
 539 config ARCH_MAY_HAVE_PC_FDC
 540         def_bool y
 541
 542 config SMP
 543         bool "Symmetric multi-processing support"
 544         depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
 545         ---help---
 546           This enables support for systems with more than one CPU. If you have
 547           a system with only one CPU, say N. If you have a system with more
 548           than one CPU, say Y.
 549
 550           If you say N here, the kernel will run on uni- and multiprocessor
 551           machines, but will use only one CPU of a multiprocessor machine. If
 552           you say Y here, the kernel will run on many, but not all,
 553           uniprocessor machines. On a uniprocessor machine, the kernel
 554           will run faster if you say N here.
 555
 556           See also the SMP-HOWTO available at
 557           <http://www.tldp.org/docs.html#howto>.
 558
 559           If you don't know what to do here, say N.
 560
 561 config HAVE_DEC_LOCK
 562         bool
 563         depends on SMP
 564         default y
 565
 566 config NR_CPUS
 567         int "Maximum number of CPUs (2-32)"
 568         range 2 32
 569         depends on SMP
 570         default "32" if ALPHA_GENERIC || ALPHA_MARVEL
 571         default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
 572         help
 573           MARVEL support can handle a maximum of 32 CPUs, all the others
 574           with working support have a maximum of 4 CPUs.
 575
 576 config ARCH_DISCONTIGMEM_ENABLE
 577         bool "Discontiguous Memory Support"
 578         help
 579           Say Y to support efficient handling of discontiguous physical memory,
 580           for architectures which are either NUMA (Non-Uniform Memory Access)
 581           or have huge holes in the physical address space for other reasons.
 582           See <file:Documentation/vm/numa> for more.
 583
 584 source "mm/Kconfig"
 585
 586 config NUMA
 587         bool "NUMA Support (EXPERIMENTAL)"
 588         depends on DISCONTIGMEM && BROKEN
 589         help
 590           Say Y to compile the kernel to support NUMA (Non-Uniform Memory
 591           Access).  This option is for configuring high-end multiprocessor
 592           server machines.  If in doubt, say N.
 593
 594 config ALPHA_WTINT
 595         bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
 596         default y if ALPHA_QEMU
 597         default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
 598         default n if !ALPHA_SRM && !ALPHA_GENERIC
 599         default y if SMP
 600         ---help---
 601           The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
 602           to sleep until the next interrupt.  This may reduce the power
 603           consumed, and the heat produced by the computer.  However, it has
 604           the side effect of making the cycle counter unreliable as a timing
 605           device across the sleep.
 606
 607           For emulation under QEMU, definitely say Y here, as we have other
 608           mechanisms for measuring time than the cycle counter.
 609
 610           For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
 611           MILO, sleep mode is not supported so you might as well say N here.
 612
 613           For SMP systems we cannot use the cycle counter for timing anyway,
 614           so you might as well say Y here.
 615
 616           If unsure, say N.
 617
 618 config NODES_SHIFT
 619         int
 620         default "7"
 621         depends on NEED_MULTIPLE_NODES
 622
 623 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
 624 config ALPHA_LARGE_VMALLOC
 625         bool
 626         ---help---
 627           Process creation and other aspects of virtual memory management can
 628           be streamlined if we restrict the kernel to one PGD for all vmalloc
 629           allocations.  This equates to about 8GB.
 630
 631           Under normal circumstances, this is so far and above what is needed
 632           as to be laughable.  However, there are certain applications (such
 633           as benchmark-grade in-kernel web serving) that can make use of as
 634           much vmalloc space as is available.
 635
 636           Say N unless you know you need gobs and gobs of vmalloc space.
 637
 638 config VERBOSE_MCHECK
 639         bool "Verbose Machine Checks"
 640
 641 config VERBOSE_MCHECK_ON
 642         int "Verbose Printing Mode (0=off, 1=on, 2=all)"
 643         depends on VERBOSE_MCHECK
 644         default 1
 645         ---help---
 646           This option allows the default printing mode to be set, and then
 647           possibly overridden by a boot command argument.
 648
 649           For example, if one wanted the option of printing verbose
 650           machine checks, but wanted the default to be as if verbose
 651           machine check printing was turned off, then one would choose
 652           the printing mode to be 0. Then, upon reboot, one could add
 653           the boot command line "verbose_mcheck=1" to get the normal
 654           verbose machine check printing, or "verbose_mcheck=2" to get
 655           the maximum information available.
 656
 657           Take the default (1) unless you want more control or more info.
 658
 659 choice
 660         prompt "Timer interrupt frequency (HZ)?"
 661         default HZ_128 if ALPHA_QEMU
 662         default HZ_1200 if ALPHA_RAWHIDE
 663         default HZ_1024
 664         ---help---
 665           The frequency at which timer interrupts occur.  A high frequency
 666           minimizes latency, whereas a low frequency minimizes overhead of
 667           process accounting.  The later effect is especially significant
 668           when being run under QEMU.
 669
 670           Note that some Alpha hardware cannot change the interrupt frequency
 671           of the timer.  If unsure, say 1024 (or 1200 for Rawhide).
 672
 673         config HZ_32
 674                 bool "32 Hz"
 675         config HZ_64
 676                 bool "64 Hz"
 677         config HZ_128
 678                 bool "128 Hz"
 679         config HZ_256
 680                 bool "256 Hz"
 681         config HZ_1024
 682                 bool "1024 Hz"
 683         config HZ_1200
 684                 bool "1200 Hz"
 685 endchoice
 686
 687 config HZ
 688         int
 689         default 32 if HZ_32
 690         default 64 if HZ_64
 691         default 128 if HZ_128
 692         default 256 if HZ_256
 693         default 1200 if HZ_1200
 694         default 1024
 695
 696 source "drivers/pci/Kconfig"
 697 source "drivers/eisa/Kconfig"
 698
 699 source "drivers/pcmcia/Kconfig"
 700
 701 config SRM_ENV
 702         tristate "SRM environment through procfs"
 703         depends on PROC_FS
 704         ---help---
 705           If you enable this option, a subdirectory inside /proc called
 706           /proc/srm_environment will give you access to the all important
 707           SRM environment variables (those which have a name) and also
 708           to all others (by their internal number).
 709
 710           SRM is something like a BIOS for Alpha machines. There are some
 711           other such BIOSes, like AlphaBIOS, which this driver cannot
 712           support (hey, that's not SRM!).
 713
 714           Despite the fact that this driver doesn't work on all Alphas (but
 715           only on those which have SRM as their firmware), it's save to
 716           build it even if your particular machine doesn't know about SRM
 717           (or if you intend to compile a generic kernel). It will simply
 718           not create those subdirectory in /proc (and give you some warning,
 719           of course).
 720
 721           This driver is also available as a module and will be called
 722           srm_env then.
 723
 724 source "fs/Kconfig.binfmt"
 725
 726 endmenu
 727
 728 source "net/Kconfig"
 729
 730 source "drivers/Kconfig"
 731
 732 source "fs/Kconfig"
 733
 734 source "arch/alpha/Kconfig.debug"
 735
 736 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
 737 # but we also need it if VGA_HOSE is set
 738 config DUMMY_CONSOLE
 739         bool
 740         depends on VGA_HOSE
 741         default y
 742
 743 source "security/Kconfig"
 744
 745 source "crypto/Kconfig"
 746
 747 source "lib/Kconfig"
 748