arch/alpha/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2 config ALPHA
   3         bool
   4         default y
   5         select ARCH_MIGHT_HAVE_PC_PARPORT
   6         select ARCH_MIGHT_HAVE_PC_SERIO
   7         select ARCH_NO_PREEMPT
   8         select ARCH_USE_CMPXCHG_LOCKREF
   9         select HAVE_AOUT
  10         select HAVE_IDE
  11         select HAVE_OPROFILE
  12         select HAVE_PCSPKR_PLATFORM
  13         select HAVE_PERF_EVENTS
  14         select NEED_DMA_MAP_STATE
  15         select NEED_SG_DMA_LENGTH
  16         select VIRT_TO_BUS
  17         select GENERIC_IRQ_PROBE
  18         select AUTO_IRQ_AFFINITY if SMP
  19         select GENERIC_IRQ_SHOW
  20         select ARCH_WANT_IPC_PARSE_VERSION
  21         select ARCH_HAVE_NMI_SAFE_CMPXCHG
  22         select AUDIT_ARCH
  23         select GENERIC_CLOCKEVENTS
  24         select GENERIC_CPU_VULNERABILITIES
  25         select GENERIC_SMP_IDLE_THREAD
  26         select GENERIC_STRNCPY_FROM_USER
  27         select GENERIC_STRNLEN_USER
  28         select HAVE_ARCH_AUDITSYSCALL
  29         select HAVE_MOD_ARCH_SPECIFIC
  30         select MODULES_USE_ELF_RELA
  31         select ODD_RT_SIGACTION
  32         select OLD_SIGSUSPEND
  33         select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
  34         help
  35           The Alpha is a 64-bit general-purpose processor designed and
  36           marketed by the Digital Equipment Corporation of blessed memory,
  37           now Hewlett-Packard.  The Alpha Linux project has a home page at
  38           <http://www.alphalinux.org/>.
  39
  40 config 64BIT
  41         def_bool y
  42
  43 config MMU
  44         bool
  45         default y
  46
  47 config RWSEM_GENERIC_SPINLOCK
  48         bool
  49
  50 config RWSEM_XCHGADD_ALGORITHM
  51         bool
  52         default y
  53
  54 config ARCH_HAS_ILOG2_U32
  55         bool
  56         default n
  57
  58 config ARCH_HAS_ILOG2_U64
  59         bool
  60         default n
  61
  62 config GENERIC_CALIBRATE_DELAY
  63         bool
  64         default y
  65
  66 config ZONE_DMA
  67         bool
  68         default y
  69
  70 config GENERIC_ISA_DMA
  71         bool
  72         default y
  73
  74 config PGTABLE_LEVELS
  75         int
  76         default 3
  77
  78 config AUDIT_ARCH
  79         bool
  80
  81 menu "System setup"
  82
  83 choice
  84         prompt "Alpha system type"
  85         default ALPHA_GENERIC
  86         ---help---
  87           This is the system type of your hardware.  A "generic" kernel will
  88           run on any supported Alpha system. However, if you configure a
  89           kernel for your specific system, it will be faster and smaller.
  90
  91           To find out what type of Alpha system you have, you may want to
  92           check out the Linux/Alpha FAQ, accessible on the WWW from
  93           <http://www.alphalinux.org/>. In summary:
  94
  95           Alcor/Alpha-XLT     AS 600, AS 500, XL-300, XL-366
  96           Alpha-XL            XL-233, XL-266
  97           AlphaBook1          Alpha laptop
  98           Avanti              AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
  99           Cabriolet           AlphaPC64, AlphaPCI64
 100           DP264               DP264 / DS20 / ES40 / DS10 / DS10L
 101           EB164               EB164 21164 evaluation board
 102           EB64+               EB64+ 21064 evaluation board
 103           EB66                EB66 21066 evaluation board
 104           EB66+               EB66+ 21066 evaluation board
 105           Jensen              DECpc 150, DEC 2000 models 300, 500
 106           LX164               AlphaPC164-LX
 107           Lynx                AS 2100A
 108           Miata               Personal Workstation 433/500/600 a/au
 109           Marvel              AlphaServer ES47 / ES80 / GS1280
 110           Mikasa              AS 1000
 111           Noname              AXPpci33, UDB (Multia)
 112           Noritake            AS 1000A, AS 600A, AS 800
 113           PC164               AlphaPC164
 114           Rawhide             AS 1200, AS 4000, AS 4100
 115           Ruffian             RPX164-2, AlphaPC164-UX, AlphaPC164-BX
 116           SX164               AlphaPC164-SX
 117           Sable               AS 2000, AS 2100
 118           Shark               DS 20L
 119           Takara              Takara (OEM)
 120           Titan               AlphaServer ES45 / DS25 / DS15
 121           Wildfire            AlphaServer GS 40/80/160/320
 122
 123           If you don't know what to do, choose "generic".
 124
 125 config ALPHA_GENERIC
 126         bool "Generic"
 127         depends on TTY
 128         help
 129           A generic kernel will run on all supported Alpha hardware.
 130
 131 config ALPHA_ALCOR
 132         bool "Alcor/Alpha-XLT"
 133         help
 134           For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
 135           slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
 136           Address, CIA) - a 383 pin plastic PGA).  It provides a DRAM
 137           controller (256-bit memory bus) and a PCI interface.  It also does
 138           all the work required to support an external Bcache and to maintain
 139           memory coherence when a PCI device DMAs into (or out of) memory.
 140
 141 config ALPHA_XL
 142         bool "Alpha-XL"
 143         help
 144           XL-233 and XL-266-based Alpha systems.
 145
 146 config ALPHA_BOOK1
 147         bool "AlphaBook1"
 148         help
 149           Dec AlphaBook1/Burns Alpha-based laptops.
 150
 151 config ALPHA_AVANTI_CH
 152         bool "Avanti"
 153
 154 config ALPHA_CABRIOLET
 155         bool "Cabriolet"
 156         help
 157           Cabriolet AlphaPC64, AlphaPCI64 systems.  Derived from EB64+ but now
 158           baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
 159           slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
 160           Bcache SIMMs.  Requires power supply with 3.3V output.
 161
 162 config ALPHA_DP264
 163         bool "DP264"
 164         help
 165           Various 21264 systems with the tsunami core logic chipset.
 166           API Networks: 264DP, UP2000(+), CS20;
 167           Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
 168
 169 config ALPHA_EB164
 170         bool "EB164"
 171         help
 172           EB164 21164 evaluation board from DEC.  Uses 21164 and ALCOR.  Has
 173           ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
 174           shared with an ISA slot) and 2 32-bit PCI slots.  Uses plus-in
 175           Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
 176           MOUSE (PS2 style), RTC/NVRAM.  Boot ROM is Flash.  PC-AT-sized
 177           motherboard.  Requires power supply with 3.3V output.
 178
 179 config ALPHA_EB64P_CH
 180         bool "EB64+"
 181
 182 config ALPHA_EB66
 183         bool "EB66"
 184         help
 185           A Digital DS group board.  Uses 21066 or 21066A.  I/O sub-system is
 186           identical to EB64+.  Baby PC-AT size.  Runs from standard PC power
 187           supply.  The EB66 schematic was published as a marketing poster
 188           advertising the 21066 as "the first microprocessor in the world with
 189           embedded PCI".
 190
 191 config ALPHA_EB66P
 192         bool "EB66+"
 193         help
 194           Later variant of the EB66 board.
 195
 196 config ALPHA_EIGER
 197         bool "Eiger"
 198         help
 199           Apparently an obscure OEM single-board computer based on the
 200           Typhoon/Tsunami chipset family. Information on it is scanty.
 201
 202 config ALPHA_JENSEN
 203         bool "Jensen"
 204         depends on BROKEN
 205         select DMA_DIRECT_OPS
 206         help
 207           DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
 208           of the first-generation Alpha systems. A number of these systems
 209           seem to be available on the second- hand market. The Jensen is a
 210           floor-standing tower system which originally used a 150MHz 21064 It
 211           used programmable logic to interface a 486 EISA I/O bridge to the
 212           CPU.
 213
 214 config ALPHA_LX164
 215         bool "LX164"
 216         help
 217           A technical overview of this board is available at
 218           <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
 219
 220 config ALPHA_LYNX
 221         bool "Lynx"
 222         help
 223           AlphaServer 2100A-based systems.
 224
 225 config ALPHA_MARVEL
 226         bool "Marvel"
 227         help
 228           AlphaServer ES47 / ES80 / GS1280 based on EV7.
 229
 230 config ALPHA_MIATA
 231         bool "Miata"
 232         help
 233           The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
 234           or 600au).
 235
 236 config ALPHA_MIKASA
 237         bool "Mikasa"
 238         help
 239           AlphaServer 1000-based Alpha systems.
 240
 241 config ALPHA_NAUTILUS
 242         bool "Nautilus"
 243         help
 244           Alpha systems based on the AMD 751 & ALI 1543C chipsets.
 245
 246 config ALPHA_NONAME_CH
 247         bool "Noname"
 248
 249 config ALPHA_NORITAKE
 250         bool "Noritake"
 251         help
 252           AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
 253           systems.
 254
 255 config ALPHA_PC164
 256         bool "PC164"
 257
 258 config ALPHA_P2K
 259         bool "Platform2000"
 260
 261 config ALPHA_RAWHIDE
 262         bool "Rawhide"
 263         help
 264           AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
 265           See HOWTO at
 266           <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
 267
 268 config ALPHA_RUFFIAN
 269         bool "Ruffian"
 270         help
 271           Samsung APC164UX.  There is a page on known problems and workarounds
 272           at <http://www.alphalinux.org/faq/FAQ-11.html>.
 273
 274 config ALPHA_RX164
 275         bool "RX164"
 276
 277 config ALPHA_SX164
 278         bool "SX164"
 279
 280 config ALPHA_SABLE
 281         bool "Sable"
 282         help
 283           Digital AlphaServer 2000 and 2100-based systems.
 284
 285 config ALPHA_SHARK
 286         bool "Shark"
 287
 288 config ALPHA_TAKARA
 289         bool "Takara"
 290         help
 291           Alpha 11164-based OEM single-board computer.
 292
 293 config ALPHA_TITAN
 294         bool "Titan"
 295         help
 296           AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
 297
 298 config ALPHA_WILDFIRE
 299         bool "Wildfire"
 300         help
 301           AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
 302
 303 endchoice
 304
 305 # clear all implied options (don't want default values for those):
 306 # Most of these machines have ISA slots; not exactly sure which don't,
 307 # and this doesn't activate hordes of code, so do it always.
 308 config ISA
 309         bool
 310         default y
 311         help
 312           Find out whether you have ISA slots on your motherboard.  ISA is the
 313           name of a bus system, i.e. the way the CPU talks to the other stuff
 314           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 315           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 316           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 317
 318 config ISA_DMA_API
 319         bool
 320         default y
 321
 322 config PCI
 323         bool
 324         depends on !ALPHA_JENSEN
 325         select GENERIC_PCI_IOMAP
 326         default y
 327         help
 328           Find out whether you have a PCI motherboard. PCI is the name of a
 329           bus system, i.e. the way the CPU talks to the other stuff inside
 330           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 331           VESA. If you have PCI, say Y, otherwise N.
 332
 333 config PCI_DOMAINS
 334         bool
 335         default y
 336
 337 config PCI_SYSCALL
 338         def_bool PCI
 339
 340 config ALPHA_NONAME
 341         bool
 342         depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
 343         default y
 344         help
 345           The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
 346           UDB).  This design was produced by Digital's Technical OEM (TOEM)
 347           group. It uses the 21066 processor running at 166MHz or 233MHz. It
 348           is a baby-AT size, and runs from a standard PC power supply. It has
 349           5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
 350           2 versions, with either PS/2 or large DIN connectors for the
 351           keyboard.
 352
 353 config ALPHA_EV4
 354         bool
 355         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
 356         default y if !ALPHA_LYNX
 357
 358 config ALPHA_LCA
 359         bool
 360         depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
 361         default y
 362
 363 config ALPHA_APECS
 364         bool
 365         depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
 366         default y
 367
 368 config ALPHA_EB64P
 369         bool
 370         depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
 371         default y
 372         help
 373           Uses 21064 or 21064A and APECs.  Has ISA and PCI expansion (3 ISA,
 374           2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
 375           ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
 376           (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
 377           SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM.  PC-AT size.
 378           Runs from standard PC power supply.
 379
 380 config ALPHA_EV5
 381         bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
 382         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
 383
 384 config ALPHA_EV4
 385         bool
 386         default y if ALPHA_LYNX && !ALPHA_EV5
 387
 388 config ALPHA_CIA
 389         bool
 390         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
 391         default y
 392
 393 config ALPHA_EV56
 394         bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
 395         default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
 396
 397 config ALPHA_EV56
 398         prompt "EV56 CPU (speed >= 333MHz)?"
 399         depends on ALPHA_NORITAKE || ALPHA_PRIMO
 400
 401 config ALPHA_EV56
 402         prompt "EV56 CPU (speed >= 400MHz)?"
 403         depends on ALPHA_RAWHIDE
 404
 405 config ALPHA_PRIMO
 406         bool "EV5 CPU daughtercard (model 5/xxx)?"
 407         depends on ALPHA_NORITAKE || ALPHA_MIKASA
 408         help
 409           Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
 410
 411 config ALPHA_GAMMA
 412         bool "EV5 CPU(s) (model 5/xxx)?"
 413         depends on ALPHA_SABLE
 414         help
 415           Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
 416
 417 config ALPHA_GAMMA
 418         bool
 419         depends on ALPHA_LYNX
 420         default y
 421
 422 config ALPHA_T2
 423         bool
 424         depends on ALPHA_SABLE || ALPHA_LYNX
 425         default y
 426
 427 config ALPHA_PYXIS
 428         bool
 429         depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
 430         default y
 431
 432 config ALPHA_EV6
 433         bool
 434         depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
 435         default y
 436
 437 config ALPHA_TSUNAMI
 438         bool
 439         depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
 440         default y
 441
 442 config ALPHA_EV67
 443         bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
 444         default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
 445         help
 446           Is this a machine based on the EV67 core?  If in doubt, select N here
 447           and the machine will be treated as an EV6.
 448
 449 config ALPHA_MCPCIA
 450         bool
 451         depends on ALPHA_RAWHIDE
 452         default y
 453
 454 config ALPHA_POLARIS
 455         bool
 456         depends on ALPHA_RX164
 457         default y
 458
 459 config ALPHA_IRONGATE
 460         bool
 461         depends on ALPHA_NAUTILUS
 462         default y
 463
 464 config GENERIC_HWEIGHT
 465         bool
 466         default y if !ALPHA_EV67
 467
 468 config ALPHA_AVANTI
 469         bool
 470         depends on ALPHA_XL || ALPHA_AVANTI_CH
 471         default y
 472         help
 473           Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
 474           Alphas. Info at
 475           <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
 476
 477 config ALPHA_BROKEN_IRQ_MASK
 478         bool
 479         depends on ALPHA_GENERIC || ALPHA_PC164
 480         default y
 481
 482 config VGA_HOSE
 483         bool
 484         depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
 485         default y
 486         help
 487           Support VGA on an arbitrary hose; needed for several platforms
 488           which always have multiple hoses, and whose consoles support it.
 489
 490
 491 config ALPHA_QEMU
 492         bool "Run under QEMU emulation"
 493         depends on !ALPHA_GENERIC
 494         ---help---
 495           Assume the presence of special features supported by QEMU PALcode
 496           that reduce the overhead of system emulation.
 497
 498           Generic kernels will auto-detect QEMU.  But when building a
 499           system-specific kernel, the assumption is that we want to
 500           eliminate as many runtime tests as possible.
 501
 502           If unsure, say N.
 503
 504
 505 config ALPHA_SRM
 506         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
 507         depends on TTY
 508         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
 509         ---help---
 510           There are two different types of booting firmware on Alphas: SRM,
 511           which is command line driven, and ARC, which uses menus and arrow
 512           keys. Details about the Linux/Alpha booting process are contained in
 513           the Linux/Alpha FAQ, accessible on the WWW from
 514           <http://www.alphalinux.org/>.
 515
 516           The usual way to load Linux on an Alpha machine is to use MILO
 517           (a bootloader that lets you pass command line parameters to the
 518           kernel just like lilo does for the x86 architecture) which can be
 519           loaded either from ARC or can be installed directly as a permanent
 520           firmware replacement from floppy (which requires changing a certain
 521           jumper on the motherboard). If you want to do either of these, say N
 522           here. If MILO doesn't work on your system (true for Jensen
 523           motherboards), you can bypass it altogether and boot Linux directly
 524           from an SRM console; say Y here in order to do that. Note that you
 525           won't be able to boot from an IDE disk using SRM.
 526
 527           If unsure, say N.
 528
 529 config EISA
 530         bool
 531         depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
 532         default y
 533
 534 config ARCH_MAY_HAVE_PC_FDC
 535         def_bool y
 536
 537 config SMP
 538         bool "Symmetric multi-processing support"
 539         depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
 540         ---help---
 541           This enables support for systems with more than one CPU. If you have
 542           a system with only one CPU, say N. If you have a system with more
 543           than one CPU, say Y.
 544
 545           If you say N here, the kernel will run on uni- and multiprocessor
 546           machines, but will use only one CPU of a multiprocessor machine. If
 547           you say Y here, the kernel will run on many, but not all,
 548           uniprocessor machines. On a uniprocessor machine, the kernel
 549           will run faster if you say N here.
 550
 551           See also the SMP-HOWTO available at
 552           <http://www.tldp.org/docs.html#howto>.
 553
 554           If you don't know what to do here, say N.
 555
 556 config NR_CPUS
 557         int "Maximum number of CPUs (2-32)"
 558         range 2 32
 559         depends on SMP
 560         default "32" if ALPHA_GENERIC || ALPHA_MARVEL
 561         default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
 562         help
 563           MARVEL support can handle a maximum of 32 CPUs, all the others
 564           with working support have a maximum of 4 CPUs.
 565
 566 config ARCH_DISCONTIGMEM_ENABLE
 567         bool "Discontiguous Memory Support"
 568         help
 569           Say Y to support efficient handling of discontiguous physical memory,
 570           for architectures which are either NUMA (Non-Uniform Memory Access)
 571           or have huge holes in the physical address space for other reasons.
 572           See <file:Documentation/vm/numa.rst> for more.
 573
 574 config NUMA
 575         bool "NUMA Support (EXPERIMENTAL)"
 576         depends on DISCONTIGMEM && BROKEN
 577         help
 578           Say Y to compile the kernel to support NUMA (Non-Uniform Memory
 579           Access).  This option is for configuring high-end multiprocessor
 580           server machines.  If in doubt, say N.
 581
 582 config ALPHA_WTINT
 583         bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
 584         default y if ALPHA_QEMU
 585         default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
 586         default n if !ALPHA_SRM && !ALPHA_GENERIC
 587         default y if SMP
 588         ---help---
 589           The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
 590           to sleep until the next interrupt.  This may reduce the power
 591           consumed, and the heat produced by the computer.  However, it has
 592           the side effect of making the cycle counter unreliable as a timing
 593           device across the sleep.
 594
 595           For emulation under QEMU, definitely say Y here, as we have other
 596           mechanisms for measuring time than the cycle counter.
 597
 598           For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
 599           MILO, sleep mode is not supported so you might as well say N here.
 600
 601           For SMP systems we cannot use the cycle counter for timing anyway,
 602           so you might as well say Y here.
 603
 604           If unsure, say N.
 605
 606 config NODES_SHIFT
 607         int
 608         default "7"
 609         depends on NEED_MULTIPLE_NODES
 610
 611 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
 612 config ALPHA_LARGE_VMALLOC
 613         bool
 614         ---help---
 615           Process creation and other aspects of virtual memory management can
 616           be streamlined if we restrict the kernel to one PGD for all vmalloc
 617           allocations.  This equates to about 8GB.
 618
 619           Under normal circumstances, this is so far and above what is needed
 620           as to be laughable.  However, there are certain applications (such
 621           as benchmark-grade in-kernel web serving) that can make use of as
 622           much vmalloc space as is available.
 623
 624           Say N unless you know you need gobs and gobs of vmalloc space.
 625
 626 config VERBOSE_MCHECK
 627         bool "Verbose Machine Checks"
 628
 629 config VERBOSE_MCHECK_ON
 630         int "Verbose Printing Mode (0=off, 1=on, 2=all)"
 631         depends on VERBOSE_MCHECK
 632         default 1
 633         ---help---
 634           This option allows the default printing mode to be set, and then
 635           possibly overridden by a boot command argument.
 636
 637           For example, if one wanted the option of printing verbose
 638           machine checks, but wanted the default to be as if verbose
 639           machine check printing was turned off, then one would choose
 640           the printing mode to be 0. Then, upon reboot, one could add
 641           the boot command line "verbose_mcheck=1" to get the normal
 642           verbose machine check printing, or "verbose_mcheck=2" to get
 643           the maximum information available.
 644
 645           Take the default (1) unless you want more control or more info.
 646
 647 choice
 648         prompt "Timer interrupt frequency (HZ)?"
 649         default HZ_128 if ALPHA_QEMU
 650         default HZ_1200 if ALPHA_RAWHIDE
 651         default HZ_1024
 652         ---help---
 653           The frequency at which timer interrupts occur.  A high frequency
 654           minimizes latency, whereas a low frequency minimizes overhead of
 655           process accounting.  The later effect is especially significant
 656           when being run under QEMU.
 657
 658           Note that some Alpha hardware cannot change the interrupt frequency
 659           of the timer.  If unsure, say 1024 (or 1200 for Rawhide).
 660
 661         config HZ_32
 662                 bool "32 Hz"
 663         config HZ_64
 664                 bool "64 Hz"
 665         config HZ_128
 666                 bool "128 Hz"
 667         config HZ_256
 668                 bool "256 Hz"
 669         config HZ_1024
 670                 bool "1024 Hz"
 671         config HZ_1200
 672                 bool "1200 Hz"
 673 endchoice
 674
 675 config HZ
 676         int
 677         default 32 if HZ_32
 678         default 64 if HZ_64
 679         default 128 if HZ_128
 680         default 256 if HZ_256
 681         default 1200 if HZ_1200
 682         default 1024
 683
 684 source "drivers/pci/Kconfig"
 685 source "drivers/eisa/Kconfig"
 686
 687 source "drivers/pcmcia/Kconfig"
 688
 689 config SRM_ENV
 690         tristate "SRM environment through procfs"
 691         depends on PROC_FS
 692         ---help---
 693           If you enable this option, a subdirectory inside /proc called
 694           /proc/srm_environment will give you access to the all important
 695           SRM environment variables (those which have a name) and also
 696           to all others (by their internal number).
 697
 698           SRM is something like a BIOS for Alpha machines. There are some
 699           other such BIOSes, like AlphaBIOS, which this driver cannot
 700           support (hey, that's not SRM!).
 701
 702           Despite the fact that this driver doesn't work on all Alphas (but
 703           only on those which have SRM as their firmware), it's save to
 704           build it even if your particular machine doesn't know about SRM
 705           (or if you intend to compile a generic kernel). It will simply
 706           not create those subdirectory in /proc (and give you some warning,
 707           of course).
 708
 709           This driver is also available as a module and will be called
 710           srm_env then.
 711
 712 endmenu
 713
 714 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
 715 # but we also need it if VGA_HOSE is set
 716 config DUMMY_CONSOLE
 717         bool
 718         depends on VGA_HOSE
 719         default y