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