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 ARCH_USE_CMPXCHG_LOCKREF
   7         select HAVE_AOUT
   8         select HAVE_IDE
   9         select HAVE_OPROFILE
  10         select HAVE_PCSPKR_PLATFORM
  11         select HAVE_PERF_EVENTS
  12         select HAVE_DMA_ATTRS
  13         select VIRT_TO_BUS
  14         select GENERIC_IRQ_PROBE
  15         select AUTO_IRQ_AFFINITY if SMP
  16         select GENERIC_IRQ_SHOW
  17         select ARCH_WANT_OPTIONAL_GPIOLIB
  18         select ARCH_WANT_IPC_PARSE_VERSION
  19         select ARCH_HAVE_NMI_SAFE_CMPXCHG
  20         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  21         select AUDIT_ARCH
  22         select GENERIC_CLOCKEVENTS
  23         select GENERIC_SMP_IDLE_THREAD
  24         select GENERIC_STRNCPY_FROM_USER
  25         select GENERIC_STRNLEN_USER
  26         select HAVE_ARCH_AUDITSYSCALL
  27         select HAVE_MOD_ARCH_SPECIFIC
  28         select MODULES_USE_ELF_RELA
  29         select ODD_RT_SIGACTION
  30         select OLD_SIGSUSPEND
  31         help
  32           The Alpha is a 64-bit general-purpose processor designed and
  33           marketed by the Digital Equipment Corporation of blessed memory,
  34           now Hewlett-Packard.  The Alpha Linux project has a home page at
  35           <http://www.alphalinux.org/>.
  36
  37 config 64BIT
  38         def_bool y
  39
  40 config MMU
  41         bool
  42         default y
  43
  44 config RWSEM_GENERIC_SPINLOCK
  45         bool
  46
  47 config RWSEM_XCHGADD_ALGORITHM
  48         bool
  49         default y
  50
  51 config ARCH_HAS_ILOG2_U32
  52         bool
  53         default n
  54
  55 config ARCH_HAS_ILOG2_U64
  56         bool
  57         default n
  58
  59 config GENERIC_CALIBRATE_DELAY
  60         bool
  61         default y
  62
  63 config ZONE_DMA
  64         bool
  65         default y
  66
  67 config ARCH_DMA_ADDR_T_64BIT
  68         def_bool y
  69
  70 config NEED_DMA_MAP_STATE
  71        def_bool y
  72
  73 config NEED_SG_DMA_LENGTH
  74         def_bool y
  75
  76 config GENERIC_ISA_DMA
  77         bool
  78         default y
  79
  80 config PGTABLE_LEVELS
  81         int
  82         default 3
  83
  84 source "init/Kconfig"
  85 source "kernel/Kconfig.freezer"
  86
  87 config AUDIT_ARCH
  88         bool
  89
  90 menu "System setup"
  91
  92 choice
  93         prompt "Alpha system type"
  94         default ALPHA_GENERIC
  95         ---help---
  96           This is the system type of your hardware.  A "generic" kernel will
  97           run on any supported Alpha system. However, if you configure a
  98           kernel for your specific system, it will be faster and smaller.
  99
 100           To find out what type of Alpha system you have, you may want to
 101           check out the Linux/Alpha FAQ, accessible on the WWW from
 102           <http://www.alphalinux.org/>. In summary:
 103
 104           Alcor/Alpha-XLT     AS 600, AS 500, XL-300, XL-366
 105           Alpha-XL            XL-233, XL-266
 106           AlphaBook1          Alpha laptop
 107           Avanti              AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
 108           Cabriolet           AlphaPC64, AlphaPCI64
 109           DP264               DP264 / DS20 / ES40 / DS10 / DS10L
 110           EB164               EB164 21164 evaluation board
 111           EB64+               EB64+ 21064 evaluation board
 112           EB66                EB66 21066 evaluation board
 113           EB66+               EB66+ 21066 evaluation board
 114           Jensen              DECpc 150, DEC 2000 models 300, 500
 115           LX164               AlphaPC164-LX
 116           Lynx                AS 2100A
 117           Miata               Personal Workstation 433/500/600 a/au
 118           Marvel              AlphaServer ES47 / ES80 / GS1280
 119           Mikasa              AS 1000
 120           Noname              AXPpci33, UDB (Multia)
 121           Noritake            AS 1000A, AS 600A, AS 800
 122           PC164               AlphaPC164
 123           Rawhide             AS 1200, AS 4000, AS 4100
 124           Ruffian             RPX164-2, AlphaPC164-UX, AlphaPC164-BX
 125           SX164               AlphaPC164-SX
 126           Sable               AS 2000, AS 2100
 127           Shark               DS 20L
 128           Takara              Takara (OEM)
 129           Titan               AlphaServer ES45 / DS25 / DS15
 130           Wildfire            AlphaServer GS 40/80/160/320
 131
 132           If you don't know what to do, choose "generic".
 133
 134 config ALPHA_GENERIC
 135         bool "Generic"
 136         depends on TTY
 137         help
 138           A generic kernel will run on all supported Alpha hardware.
 139
 140 config ALPHA_ALCOR
 141         bool "Alcor/Alpha-XLT"
 142         help
 143           For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
 144           slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
 145           Address, CIA) - a 383 pin plastic PGA).  It provides a DRAM
 146           controller (256-bit memory bus) and a PCI interface.  It also does
 147           all the work required to support an external Bcache and to maintain
 148           memory coherence when a PCI device DMAs into (or out of) memory.
 149
 150 config ALPHA_XL
 151         bool "Alpha-XL"
 152         help
 153           XL-233 and XL-266-based Alpha systems.
 154
 155 config ALPHA_BOOK1
 156         bool "AlphaBook1"
 157         help
 158           Dec AlphaBook1/Burns Alpha-based laptops.
 159
 160 config ALPHA_AVANTI_CH
 161         bool "Avanti"
 162
 163 config ALPHA_CABRIOLET
 164         bool "Cabriolet"
 165         help
 166           Cabriolet AlphaPC64, AlphaPCI64 systems.  Derived from EB64+ but now
 167           baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
 168           slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
 169           Bcache SIMMs.  Requires power supply with 3.3V output.
 170
 171 config ALPHA_DP264
 172         bool "DP264"
 173         help
 174           Various 21264 systems with the tsunami core logic chipset.
 175           API Networks: 264DP, UP2000(+), CS20;
 176           Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
 177
 178 config ALPHA_EB164
 179         bool "EB164"
 180         help
 181           EB164 21164 evaluation board from DEC.  Uses 21164 and ALCOR.  Has
 182           ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
 183           shared with an ISA slot) and 2 32-bit PCI slots.  Uses plus-in
 184           Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
 185           MOUSE (PS2 style), RTC/NVRAM.  Boot ROM is Flash.  PC-AT-sized
 186           motherboard.  Requires power supply with 3.3V output.
 187
 188 config ALPHA_EB64P_CH
 189         bool "EB64+"
 190
 191 config ALPHA_EB66
 192         bool "EB66"
 193         help
 194           A Digital DS group board.  Uses 21066 or 21066A.  I/O sub-system is
 195           identical to EB64+.  Baby PC-AT size.  Runs from standard PC power
 196           supply.  The EB66 schematic was published as a marketing poster
 197           advertising the 21066 as "the first microprocessor in the world with
 198           embedded PCI".
 199
 200 config ALPHA_EB66P
 201         bool "EB66+"
 202         help
 203           Later variant of the EB66 board.
 204
 205 config ALPHA_EIGER
 206         bool "Eiger"
 207         help
 208           Apparently an obscure OEM single-board computer based on the
 209           Typhoon/Tsunami chipset family. Information on it is scanty.
 210
 211 config ALPHA_JENSEN
 212         bool "Jensen"
 213         help
 214           DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
 215           of the first-generation Alpha systems. A number of these systems
 216           seem to be available on the second- hand market. The Jensen is a
 217           floor-standing tower system which originally used a 150MHz 21064 It
 218           used programmable logic to interface a 486 EISA I/O bridge to the
 219           CPU.
 220
 221 config ALPHA_LX164
 222         bool "LX164"
 223         help
 224           A technical overview of this board is available at
 225           <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
 226
 227 config ALPHA_LYNX
 228         bool "Lynx"
 229         help
 230           AlphaServer 2100A-based systems.
 231
 232 config ALPHA_MARVEL
 233         bool "Marvel"
 234         help
 235           AlphaServer ES47 / ES80 / GS1280 based on EV7.
 236
 237 config ALPHA_MIATA
 238         bool "Miata"
 239         help
 240           The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
 241           or 600au).
 242
 243 config ALPHA_MIKASA
 244         bool "Mikasa"
 245         help
 246           AlphaServer 1000-based Alpha systems.
 247
 248 config ALPHA_NAUTILUS
 249         bool "Nautilus"
 250         help
 251           Alpha systems based on the AMD 751 & ALI 1543C chipsets.
 252
 253 config ALPHA_NONAME_CH
 254         bool "Noname"
 255
 256 config ALPHA_NORITAKE
 257         bool "Noritake"
 258         help
 259           AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
 260           systems.
 261
 262 config ALPHA_PC164
 263         bool "PC164"
 264
 265 config ALPHA_P2K
 266         bool "Platform2000"
 267
 268 config ALPHA_RAWHIDE
 269         bool "Rawhide"
 270         help
 271           AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
 272           See HOWTO at
 273           <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
 274
 275 config ALPHA_RUFFIAN
 276         bool "Ruffian"
 277         help
 278           Samsung APC164UX.  There is a page on known problems and workarounds
 279           at <http://www.alphalinux.org/faq/FAQ-11.html>.
 280
 281 config ALPHA_RX164
 282         bool "RX164"
 283
 284 config ALPHA_SX164
 285         bool "SX164"
 286
 287 config ALPHA_SABLE
 288         bool "Sable"
 289         help
 290           Digital AlphaServer 2000 and 2100-based systems.
 291
 292 config ALPHA_SHARK
 293         bool "Shark"
 294
 295 config ALPHA_TAKARA
 296         bool "Takara"
 297         help
 298           Alpha 11164-based OEM single-board computer.
 299
 300 config ALPHA_TITAN
 301         bool "Titan"
 302         help
 303           AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
 304
 305 config ALPHA_WILDFIRE
 306         bool "Wildfire"
 307         help
 308           AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
 309
 310 endchoice
 311
 312 # clear all implied options (don't want default values for those):
 313 # Most of these machines have ISA slots; not exactly sure which don't,
 314 # and this doesn't activate hordes of code, so do it always.
 315 config ISA
 316         bool
 317         default y
 318         help
 319           Find out whether you have ISA slots on your motherboard.  ISA is the
 320           name of a bus system, i.e. the way the CPU talks to the other stuff
 321           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 322           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 323           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 324
 325 config ISA_DMA_API
 326         bool
 327         default y
 328
 329 config PCI
 330         bool
 331         depends on !ALPHA_JENSEN
 332         select GENERIC_PCI_IOMAP
 333         default y
 334         help
 335           Find out whether you have a PCI motherboard. PCI is the name of a
 336           bus system, i.e. the way the CPU talks to the other stuff inside
 337           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 338           VESA. If you have PCI, say Y, otherwise N.
 339
 340 config PCI_DOMAINS
 341         bool
 342         default y
 343
 344 config PCI_SYSCALL
 345         def_bool PCI
 346
 347 config IOMMU_HELPER
 348         def_bool PCI
 349
 350 config ALPHA_NONAME
 351         bool
 352         depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
 353         default y
 354         help
 355           The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
 356           UDB).  This design was produced by Digital's Technical OEM (TOEM)
 357           group. It uses the 21066 processor running at 166MHz or 233MHz. It
 358           is a baby-AT size, and runs from a standard PC power supply. It has
 359           5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
 360           2 versions, with either PS/2 or large DIN connectors for the
 361           keyboard.
 362
 363 config ALPHA_EV4
 364         bool
 365         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
 366         default y if !ALPHA_LYNX
 367
 368 config ALPHA_LCA
 369         bool
 370         depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
 371         default y
 372
 373 config ALPHA_APECS
 374         bool
 375         depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
 376         default y
 377
 378 config ALPHA_EB64P
 379         bool
 380         depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
 381         default y
 382         help
 383           Uses 21064 or 21064A and APECs.  Has ISA and PCI expansion (3 ISA,
 384           2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
 385           ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
 386           (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
 387           SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM.  PC-AT size.
 388           Runs from standard PC power supply.
 389
 390 config ALPHA_EV5
 391         bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
 392         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
 393
 394 config ALPHA_EV4
 395         bool
 396         default y if ALPHA_LYNX && !ALPHA_EV5
 397
 398 config ALPHA_CIA
 399         bool
 400         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
 401         default y
 402
 403 config ALPHA_EV56
 404         bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
 405         default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
 406
 407 config ALPHA_EV56
 408         prompt "EV56 CPU (speed >= 333MHz)?"
 409         depends on ALPHA_NORITAKE || ALPHA_PRIMO
 410
 411 config ALPHA_EV56
 412         prompt "EV56 CPU (speed >= 400MHz)?"
 413         depends on ALPHA_RAWHIDE
 414
 415 config ALPHA_PRIMO
 416         bool "EV5 CPU daughtercard (model 5/xxx)?"
 417         depends on ALPHA_NORITAKE || ALPHA_MIKASA
 418         help
 419           Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
 420
 421 config ALPHA_GAMMA
 422         bool "EV5 CPU(s) (model 5/xxx)?"
 423         depends on ALPHA_SABLE
 424         help
 425           Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
 426
 427 config ALPHA_GAMMA
 428         bool
 429         depends on ALPHA_LYNX
 430         default y
 431
 432 config ALPHA_T2
 433         bool
 434         depends on ALPHA_SABLE || ALPHA_LYNX
 435         default y
 436
 437 config ALPHA_PYXIS
 438         bool
 439         depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
 440         default y
 441
 442 config ALPHA_EV6
 443         bool
 444         depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
 445         default y
 446
 447 config ALPHA_TSUNAMI
 448         bool
 449         depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
 450         default y
 451
 452 config ALPHA_EV67
 453         bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
 454         default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
 455         help
 456           Is this a machine based on the EV67 core?  If in doubt, select N here
 457           and the machine will be treated as an EV6.
 458
 459 config ALPHA_MCPCIA
 460         bool
 461         depends on ALPHA_RAWHIDE
 462         default y
 463
 464 config ALPHA_POLARIS
 465         bool
 466         depends on ALPHA_RX164
 467         default y
 468
 469 config ALPHA_IRONGATE
 470         bool
 471         depends on ALPHA_NAUTILUS
 472         default y
 473
 474 config GENERIC_HWEIGHT
 475         bool
 476         default y if !ALPHA_EV67
 477
 478 config ALPHA_AVANTI
 479         bool
 480         depends on ALPHA_XL || ALPHA_AVANTI_CH
 481         default y
 482         help
 483           Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
 484           Alphas. Info at
 485           <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
 486
 487 config ALPHA_BROKEN_IRQ_MASK
 488         bool
 489         depends on ALPHA_GENERIC || ALPHA_PC164
 490         default y
 491
 492 config VGA_HOSE
 493         bool
 494         depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
 495         default y
 496         help
 497           Support VGA on an arbitrary hose; needed for several platforms
 498           which always have multiple hoses, and whose consoles support it.
 499
 500
 501 config ALPHA_QEMU
 502         bool "Run under QEMU emulation"
 503         depends on !ALPHA_GENERIC
 504         ---help---
 505           Assume the presence of special features supported by QEMU PALcode
 506           that reduce the overhead of system emulation.
 507
 508           Generic kernels will auto-detect QEMU.  But when building a
 509           system-specific kernel, the assumption is that we want to
 510           elimiate as many runtime tests as possible.
 511
 512           If unsure, say N.
 513
 514
 515 config ALPHA_SRM
 516         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
 517         depends on TTY
 518         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
 519         ---help---
 520           There are two different types of booting firmware on Alphas: SRM,
 521           which is command line driven, and ARC, which uses menus and arrow
 522           keys. Details about the Linux/Alpha booting process are contained in
 523           the Linux/Alpha FAQ, accessible on the WWW from
 524           <http://www.alphalinux.org/>.
 525
 526           The usual way to load Linux on an Alpha machine is to use MILO
 527           (a bootloader that lets you pass command line parameters to the
 528           kernel just like lilo does for the x86 architecture) which can be
 529           loaded either from ARC or can be installed directly as a permanent
 530           firmware replacement from floppy (which requires changing a certain
 531           jumper on the motherboard). If you want to do either of these, say N
 532           here. If MILO doesn't work on your system (true for Jensen
 533           motherboards), you can bypass it altogether and boot Linux directly
 534           from an SRM console; say Y here in order to do that. Note that you
 535           won't be able to boot from an IDE disk using SRM.
 536
 537           If unsure, say N.
 538
 539 config EISA
 540         bool
 541         depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
 542         default y
 543
 544 config ARCH_MAY_HAVE_PC_FDC
 545         def_bool y
 546
 547 config SMP
 548         bool "Symmetric multi-processing support"
 549         depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
 550         ---help---
 551           This enables support for systems with more than one CPU. If you have
 552           a system with only one CPU, say N. If you have a system with more
 553           than one CPU, say Y.
 554
 555           If you say N here, the kernel will run on uni- and multiprocessor
 556           machines, but will use only one CPU of a multiprocessor machine. If
 557           you say Y here, the kernel will run on many, but not all,
 558           uniprocessor machines. On a uniprocessor machine, the kernel
 559           will run faster if you say N here.
 560
 561           See also the SMP-HOWTO available at
 562           <http://www.tldp.org/docs.html#howto>.
 563
 564           If you don't know what to do here, say N.
 565
 566 config HAVE_DEC_LOCK
 567         bool
 568         depends on SMP
 569         default y
 570
 571 config NR_CPUS
 572         int "Maximum number of CPUs (2-32)"
 573         range 2 32
 574         depends on SMP
 575         default "32" if ALPHA_GENERIC || ALPHA_MARVEL
 576         default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
 577         help
 578           MARVEL support can handle a maximum of 32 CPUs, all the others
 579           with working support have a maximum of 4 CPUs.
 580
 581 config ARCH_DISCONTIGMEM_ENABLE
 582         bool "Discontiguous Memory Support"
 583         help
 584           Say Y to support efficient handling of discontiguous physical memory,
 585           for architectures which are either NUMA (Non-Uniform Memory Access)
 586           or have huge holes in the physical address space for other reasons.
 587           See <file:Documentation/vm/numa> for more.
 588
 589 source "mm/Kconfig"
 590
 591 config NUMA
 592         bool "NUMA Support (EXPERIMENTAL)"
 593         depends on DISCONTIGMEM && BROKEN
 594         help
 595           Say Y to compile the kernel to support NUMA (Non-Uniform Memory
 596           Access).  This option is for configuring high-end multiprocessor
 597           server machines.  If in doubt, say N.
 598
 599 config ALPHA_WTINT
 600         bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
 601         default y if ALPHA_QEMU
 602         default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
 603         default n if !ALPHA_SRM && !ALPHA_GENERIC
 604         default y if SMP
 605         ---help---
 606           The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
 607           to sleep until the next interrupt.  This may reduce the power
 608           consumed, and the heat produced by the computer.  However, it has
 609           the side effect of making the cycle counter unreliable as a timing
 610           device across the sleep.
 611
 612           For emulation under QEMU, definitely say Y here, as we have other
 613           mechanisms for measuring time than the cycle counter.
 614
 615           For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
 616           MILO, sleep mode is not supported so you might as well say N here.
 617
 618           For SMP systems we cannot use the cycle counter for timing anyway,
 619           so you might as well say Y here.
 620
 621           If unsure, say N.
 622
 623 config NODES_SHIFT
 624         int
 625         default "7"
 626         depends on NEED_MULTIPLE_NODES
 627
 628 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
 629 config ALPHA_LARGE_VMALLOC
 630         bool
 631         ---help---
 632           Process creation and other aspects of virtual memory management can
 633           be streamlined if we restrict the kernel to one PGD for all vmalloc
 634           allocations.  This equates to about 8GB.
 635
 636           Under normal circumstances, this is so far and above what is needed
 637           as to be laughable.  However, there are certain applications (such
 638           as benchmark-grade in-kernel web serving) that can make use of as
 639           much vmalloc space as is available.
 640
 641           Say N unless you know you need gobs and gobs of vmalloc space.
 642
 643 config VERBOSE_MCHECK
 644         bool "Verbose Machine Checks"
 645
 646 config VERBOSE_MCHECK_ON
 647         int "Verbose Printing Mode (0=off, 1=on, 2=all)"
 648         depends on VERBOSE_MCHECK
 649         default 1
 650         ---help---
 651           This option allows the default printing mode to be set, and then
 652           possibly overridden by a boot command argument.
 653
 654           For example, if one wanted the option of printing verbose
 655           machine checks, but wanted the default to be as if verbose
 656           machine check printing was turned off, then one would choose
 657           the printing mode to be 0. Then, upon reboot, one could add
 658           the boot command line "verbose_mcheck=1" to get the normal
 659           verbose machine check printing, or "verbose_mcheck=2" to get
 660           the maximum information available.
 661
 662           Take the default (1) unless you want more control or more info.
 663
 664 choice
 665         prompt "Timer interrupt frequency (HZ)?"
 666         default HZ_128 if ALPHA_QEMU
 667         default HZ_1200 if ALPHA_RAWHIDE
 668         default HZ_1024
 669         ---help---
 670           The frequency at which timer interrupts occur.  A high frequency
 671           minimizes latency, whereas a low frequency minimizes overhead of
 672           process accounting.  The later effect is especially significant
 673           when being run under QEMU.
 674
 675           Note that some Alpha hardware cannot change the interrupt frequency
 676           of the timer.  If unsure, say 1024 (or 1200 for Rawhide).
 677
 678         config HZ_32
 679                 bool "32 Hz"
 680         config HZ_64
 681                 bool "64 Hz"
 682         config HZ_128
 683                 bool "128 Hz"
 684         config HZ_256
 685                 bool "256 Hz"
 686         config HZ_1024
 687                 bool "1024 Hz"
 688         config HZ_1200
 689                 bool "1200 Hz"
 690 endchoice
 691
 692 config HZ
 693         int
 694         default 32 if HZ_32
 695         default 64 if HZ_64
 696         default 128 if HZ_128
 697         default 256 if HZ_256
 698         default 1200 if HZ_1200
 699         default 1024
 700
 701 source "drivers/pci/Kconfig"
 702 source "drivers/eisa/Kconfig"
 703
 704 source "drivers/pcmcia/Kconfig"
 705
 706 config SRM_ENV
 707         tristate "SRM environment through procfs"
 708         depends on PROC_FS
 709         ---help---
 710           If you enable this option, a subdirectory inside /proc called
 711           /proc/srm_environment will give you access to the all important
 712           SRM environment variables (those which have a name) and also
 713           to all others (by their internal number).
 714
 715           SRM is something like a BIOS for Alpha machines. There are some
 716           other such BIOSes, like AlphaBIOS, which this driver cannot
 717           support (hey, that's not SRM!).
 718
 719           Despite the fact that this driver doesn't work on all Alphas (but
 720           only on those which have SRM as their firmware), it's save to
 721           build it even if your particular machine doesn't know about SRM
 722           (or if you intend to compile a generic kernel). It will simply
 723           not create those subdirectory in /proc (and give you some warning,
 724           of course).
 725
 726           This driver is also available as a module and will be called
 727           srm_env then.
 728
 729 source "fs/Kconfig.binfmt"
 730
 731 endmenu
 732
 733 source "net/Kconfig"
 734
 735 source "drivers/Kconfig"
 736
 737 source "fs/Kconfig"
 738
 739 source "arch/alpha/Kconfig.debug"
 740
 741 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
 742 # but we also need it if VGA_HOSE is set
 743 config DUMMY_CONSOLE
 744         bool
 745         depends on VGA_HOSE
 746         default y
 747
 748 source "security/Kconfig"
 749
 750 source "crypto/Kconfig"
 751
 752 source "lib/Kconfig"
 753