arch/alpha/Kconfig

   1 #
   2 # For a description of the syntax of this configuration file,
   3 # see Documentation/kbuild/kconfig-language.txt.
   4 #
   5 config ALPHA
   6         bool
   7         default y
   8         select HAVE_AOUT
   9         select HAVE_IDE
  10         select HAVE_OPROFILE
  11         select HAVE_SYSCALL_WRAPPERS
  12         select HAVE_PERF_EVENTS
  13         select HAVE_DMA_ATTRS
  14         help
  15           The Alpha is a 64-bit general-purpose processor designed and
  16           marketed by the Digital Equipment Corporation of blessed memory,
  17           now Hewlett-Packard.  The Alpha Linux project has a home page at
  18           <http://www.alphalinux.org/>.
  19
  20 config 64BIT
  21         def_bool y
  22
  23 config MMU
  24         bool
  25         default y
  26
  27 config RWSEM_GENERIC_SPINLOCK
  28         bool
  29
  30 config RWSEM_XCHGADD_ALGORITHM
  31         bool
  32         default y
  33
  34 config ARCH_HAS_ILOG2_U32
  35         bool
  36         default n
  37
  38 config ARCH_HAS_ILOG2_U64
  39         bool
  40         default n
  41
  42 config GENERIC_FIND_NEXT_BIT
  43         bool
  44         default y
  45
  46 config GENERIC_CALIBRATE_DELAY
  47         bool
  48         default y
  49
  50 config GENERIC_TIME
  51         bool
  52         default y
  53
  54 config ARCH_USES_GETTIMEOFFSET
  55         bool
  56         default y
  57
  58 config GENERIC_CMOS_UPDATE
  59         def_bool y
  60
  61 config ZONE_DMA
  62         bool
  63         default y
  64
  65 config NEED_DMA_MAP_STATE
  66        def_bool y
  67
  68 config GENERIC_ISA_DMA
  69         bool
  70         default y
  71
  72 config GENERIC_IOMAP
  73         bool
  74         default n
  75
  76 config GENERIC_HARDIRQS
  77         bool
  78         default y
  79
  80 config GENERIC_IRQ_PROBE
  81         bool
  82         default y
  83
  84 config AUTO_IRQ_AFFINITY
  85         bool
  86         depends on SMP
  87         default y
  88
  89 source "init/Kconfig"
  90 source "kernel/Kconfig.freezer"
  91
  92
  93 menu "System setup"
  94
  95 choice
  96         prompt "Alpha system type"
  97         default ALPHA_GENERIC
  98         ---help---
  99           This is the system type of your hardware.  A "generic" kernel will
 100           run on any supported Alpha system. However, if you configure a
 101           kernel for your specific system, it will be faster and smaller.
 102
 103           To find out what type of Alpha system you have, you may want to
 104           check out the Linux/Alpha FAQ, accessible on the WWW from
 105           <http://www.alphalinux.org/>. In summary:
 106
 107           Alcor/Alpha-XLT     AS 600, AS 500, XL-300, XL-366
 108           Alpha-XL            XL-233, XL-266
 109           AlphaBook1          Alpha laptop
 110           Avanti              AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
 111           Cabriolet           AlphaPC64, AlphaPCI64
 112           DP264               DP264 / DS20 / ES40 / DS10 / DS10L
 113           EB164               EB164 21164 evaluation board
 114           EB64+               EB64+ 21064 evaluation board
 115           EB66                EB66 21066 evaluation board
 116           EB66+               EB66+ 21066 evaluation board
 117           Jensen              DECpc 150, DEC 2000 models 300, 500
 118           LX164               AlphaPC164-LX
 119           Lynx                AS 2100A
 120           Miata               Personal Workstation 433/500/600 a/au
 121           Marvel              AlphaServer ES47 / ES80 / GS1280
 122           Mikasa              AS 1000
 123           Noname              AXPpci33, UDB (Multia)
 124           Noritake            AS 1000A, AS 600A, AS 800
 125           PC164               AlphaPC164
 126           Rawhide             AS 1200, AS 4000, AS 4100
 127           Ruffian             RPX164-2, AlphaPC164-UX, AlphaPC164-BX
 128           SX164               AlphaPC164-SX
 129           Sable               AS 2000, AS 2100
 130           Shark               DS 20L
 131           Takara              Takara (OEM)
 132           Titan               AlphaServer ES45 / DS25 / DS15
 133           Wildfire            AlphaServer GS 40/80/160/320
 134
 135           If you don't know what to do, choose "generic".
 136
 137 config ALPHA_GENERIC
 138         bool "Generic"
 139         help
 140           A generic kernel will run on all supported Alpha hardware.
 141
 142 config ALPHA_ALCOR
 143         bool "Alcor/Alpha-XLT"
 144         help
 145           For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
 146           slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
 147           Address, CIA) - a 383 pin plastic PGA).  It provides a DRAM
 148           controller (256-bit memory bus) and a PCI interface.  It also does
 149           all the work required to support an external Bcache and to maintain
 150           memory coherence when a PCI device DMAs into (or out of) memory.
 151
 152 config ALPHA_XL
 153         bool "Alpha-XL"
 154         help
 155           XL-233 and XL-266-based Alpha systems.
 156
 157 config ALPHA_BOOK1
 158         bool "AlphaBook1"
 159         help
 160           Dec AlphaBook1/Burns Alpha-based laptops.
 161
 162 config ALPHA_AVANTI_CH
 163         bool "Avanti"
 164
 165 config ALPHA_CABRIOLET
 166         bool "Cabriolet"
 167         help
 168           Cabriolet AlphaPC64, AlphaPCI64 systems.  Derived from EB64+ but now
 169           baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
 170           slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
 171           Bcache SIMMs.  Requires power supply with 3.3V output.
 172
 173 config ALPHA_DP264
 174         bool "DP264"
 175         help
 176           Various 21264 systems with the tsunami core logic chipset.
 177           API Networks: 264DP, UP2000(+), CS20;
 178           Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
 179
 180 config ALPHA_EB164
 181         bool "EB164"
 182         help
 183           EB164 21164 evaluation board from DEC.  Uses 21164 and ALCOR.  Has
 184           ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
 185           shared with an ISA slot) and 2 32-bit PCI slots.  Uses plus-in
 186           Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
 187           MOUSE (PS2 style), RTC/NVRAM.  Boot ROM is Flash.  PC-AT-sized
 188           motherboard.  Requires power supply with 3.3V output.
 189
 190 config ALPHA_EB64P_CH
 191         bool "EB64+"
 192
 193 config ALPHA_EB66
 194         bool "EB66"
 195         help
 196           A Digital DS group board.  Uses 21066 or 21066A.  I/O sub-system is
 197           identical to EB64+.  Baby PC-AT size.  Runs from standard PC power
 198           supply.  The EB66 schematic was published as a marketing poster
 199           advertising the 21066 as "the first microprocessor in the world with
 200           embedded PCI".
 201
 202 config ALPHA_EB66P
 203         bool "EB66+"
 204         help
 205           Later variant of the EB66 board.
 206
 207 config ALPHA_EIGER
 208         bool "Eiger"
 209         help
 210           Apparently an obscure OEM single-board computer based on the
 211           Typhoon/Tsunami chipset family. Information on it is scanty.
 212
 213 config ALPHA_JENSEN
 214         bool "Jensen"
 215         help
 216           DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
 217           of the first-generation Alpha systems. A number of these systems
 218           seem to be available on the second- hand market. The Jensen is a
 219           floor-standing tower system which originally used a 150MHz 21064 It
 220           used programmable logic to interface a 486 EISA I/O bridge to the
 221           CPU.
 222
 223 config ALPHA_LX164
 224         bool "LX164"
 225         help
 226           A technical overview of this board is available at
 227           <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
 228
 229 config ALPHA_LYNX
 230         bool "Lynx"
 231         help
 232           AlphaServer 2100A-based systems.
 233
 234 config ALPHA_MARVEL
 235         bool "Marvel"
 236         help
 237           AlphaServer ES47 / ES80 / GS1280 based on EV7.
 238
 239 config ALPHA_MIATA
 240         bool "Miata"
 241         help
 242           The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
 243           or 600au).
 244
 245 config ALPHA_MIKASA
 246         bool "Mikasa"
 247         help
 248           AlphaServer 1000-based Alpha systems.
 249
 250 config ALPHA_NAUTILUS
 251         bool "Nautilus"
 252         help
 253           Alpha systems based on the AMD 751 & ALI 1543C chipsets.
 254
 255 config ALPHA_NONAME_CH
 256         bool "Noname"
 257
 258 config ALPHA_NORITAKE
 259         bool "Noritake"
 260         help
 261           AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
 262           systems.
 263
 264 config ALPHA_PC164
 265         bool "PC164"
 266
 267 config ALPHA_P2K
 268         bool "Platform2000"
 269
 270 config ALPHA_RAWHIDE
 271         bool "Rawhide"
 272         help
 273           AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
 274           See HOWTO at
 275           <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
 276
 277 config ALPHA_RUFFIAN
 278         bool "Ruffian"
 279         help
 280           Samsung APC164UX.  There is a page on known problems and workarounds
 281           at <http://www.alphalinux.org/faq/FAQ-11.html>.
 282
 283 config ALPHA_RX164
 284         bool "RX164"
 285
 286 config ALPHA_SX164
 287         bool "SX164"
 288
 289 config ALPHA_SABLE
 290         bool "Sable"
 291         help
 292           Digital AlphaServer 2000 and 2100-based systems.
 293
 294 config ALPHA_SHARK
 295         bool "Shark"
 296
 297 config ALPHA_TAKARA
 298         bool "Takara"
 299         help
 300           Alpha 11164-based OEM single-board computer.
 301
 302 config ALPHA_TITAN
 303         bool "Titan"
 304         help
 305           AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
 306
 307 config ALPHA_WILDFIRE
 308         bool "Wildfire"
 309         help
 310           AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
 311
 312 endchoice
 313
 314 # clear all implied options (don't want default values for those):
 315 # Most of these machines have ISA slots; not exactly sure which don't,
 316 # and this doesn't activate hordes of code, so do it always.
 317 config ISA
 318         bool
 319         default y
 320         help
 321           Find out whether you have ISA slots on your motherboard.  ISA is the
 322           name of a bus system, i.e. the way the CPU talks to the other stuff
 323           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 324           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 325           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 326
 327 config ISA_DMA_API
 328         bool
 329         default y
 330
 331 config PCI
 332         bool
 333         depends on !ALPHA_JENSEN
 334         default y
 335         help
 336           Find out whether you have a PCI motherboard. PCI is the name of a
 337           bus system, i.e. the way the CPU talks to the other stuff inside
 338           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 339           VESA. If you have PCI, say Y, otherwise N.
 340
 341 config PCI_DOMAINS
 342         bool
 343         default y
 344
 345 config PCI_SYSCALL
 346         def_bool PCI
 347
 348 config IOMMU_HELPER
 349         def_bool PCI
 350
 351 config ALPHA_NONAME
 352         bool
 353         depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
 354         default y
 355         help
 356           The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
 357           UDB).  This design was produced by Digital's Technical OEM (TOEM)
 358           group. It uses the 21066 processor running at 166MHz or 233MHz. It
 359           is a baby-AT size, and runs from a standard PC power supply. It has
 360           5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
 361           2 versions, with either PS/2 or large DIN connectors for the
 362           keyboard.
 363
 364 config ALPHA_EV4
 365         bool
 366         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
 367         default y if !ALPHA_LYNX
 368
 369 config ALPHA_LCA
 370         bool
 371         depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
 372         default y
 373
 374 config ALPHA_APECS
 375         bool
 376         depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
 377         default y
 378
 379 config ALPHA_EB64P
 380         bool
 381         depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
 382         default y
 383         help
 384           Uses 21064 or 21064A and APECs.  Has ISA and PCI expansion (3 ISA,
 385           2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
 386           ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
 387           (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
 388           SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM.  PC-AT size.
 389           Runs from standard PC power supply.
 390
 391 config ALPHA_EV5
 392         bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
 393         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
 394
 395 config ALPHA_EV4
 396         bool
 397         default y if ALPHA_LYNX && !ALPHA_EV5
 398
 399 config ALPHA_CIA
 400         bool
 401         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
 402         default y
 403
 404 config ALPHA_EV56
 405         bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
 406         default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
 407
 408 config ALPHA_EV56
 409         prompt "EV56 CPU (speed >= 333MHz)?"
 410         depends on ALPHA_NORITAKE || ALPHA_PRIMO
 411
 412 config ALPHA_EV56
 413         prompt "EV56 CPU (speed >= 400MHz)?"
 414         depends on ALPHA_RAWHIDE
 415
 416 config ALPHA_PRIMO
 417         bool "EV5 CPU daughtercard (model 5/xxx)?"
 418         depends on ALPHA_NORITAKE || ALPHA_MIKASA
 419         help
 420           Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
 421
 422 config ALPHA_GAMMA
 423         bool "EV5 CPU(s) (model 5/xxx)?"
 424         depends on ALPHA_SABLE
 425         help
 426           Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
 427
 428 config ALPHA_GAMMA
 429         bool
 430         depends on ALPHA_LYNX
 431         default y
 432
 433 config ALPHA_T2
 434         bool
 435         depends on ALPHA_SABLE || ALPHA_LYNX
 436         default y
 437
 438 config ALPHA_PYXIS
 439         bool
 440         depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
 441         default y
 442
 443 config ALPHA_EV6
 444         bool
 445         depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
 446         default y
 447
 448 config ALPHA_TSUNAMI
 449         bool
 450         depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
 451         default y
 452
 453 config ALPHA_EV67
 454         bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
 455         default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
 456         help
 457           Is this a machine based on the EV67 core?  If in doubt, select N here
 458           and the machine will be treated as an EV6.
 459
 460 config ALPHA_EV7
 461         bool
 462         depends on ALPHA_MARVEL
 463         default y
 464
 465 config ALPHA_MCPCIA
 466         bool
 467         depends on ALPHA_RAWHIDE
 468         default y
 469
 470 config ALPHA_POLARIS
 471         bool
 472         depends on ALPHA_RX164
 473         default y
 474
 475 config ALPHA_IRONGATE
 476         bool
 477         depends on ALPHA_NAUTILUS
 478         default y
 479
 480 config GENERIC_HWEIGHT
 481         bool
 482         default y if !ALPHA_EV67
 483
 484 config ALPHA_AVANTI
 485         bool
 486         depends on ALPHA_XL || ALPHA_AVANTI_CH
 487         default y
 488         help
 489           Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
 490           Alphas. Info at
 491           <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
 492
 493 config ALPHA_BROKEN_IRQ_MASK
 494         bool
 495         depends on ALPHA_GENERIC || ALPHA_PC164
 496         default y
 497
 498 config VGA_HOSE
 499         bool
 500         depends on ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI
 501         default y
 502         help
 503           Support VGA on an arbitrary hose; needed for several platforms
 504           which always have multiple hoses, and whose consoles support it.
 505
 506
 507 config ALPHA_SRM
 508         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
 509         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
 510         ---help---
 511           There are two different types of booting firmware on Alphas: SRM,
 512           which is command line driven, and ARC, which uses menus and arrow
 513           keys. Details about the Linux/Alpha booting process are contained in
 514           the Linux/Alpha FAQ, accessible on the WWW from
 515           <http://www.alphalinux.org/>.
 516
 517           The usual way to load Linux on an Alpha machine is to use MILO
 518           (a bootloader that lets you pass command line parameters to the
 519           kernel just like lilo does for the x86 architecture) which can be
 520           loaded either from ARC or can be installed directly as a permanent
 521           firmware replacement from floppy (which requires changing a certain
 522           jumper on the motherboard). If you want to do either of these, say N
 523           here. If MILO doesn't work on your system (true for Jensen
 524           motherboards), you can bypass it altogether and boot Linux directly
 525           from an SRM console; say Y here in order to do that. Note that you
 526           won't be able to boot from an IDE disk using SRM.
 527
 528           If unsure, say N.
 529
 530 config EISA
 531         bool
 532         depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
 533         default y
 534
 535 config ARCH_MAY_HAVE_PC_FDC
 536         def_bool y
 537
 538 config SMP
 539         bool "Symmetric multi-processing support"
 540         depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
 541         select USE_GENERIC_SMP_HELPERS
 542         ---help---
 543           This enables support for systems with more than one CPU. If you have
 544           a system with only one CPU, like most personal computers, say N. If
 545           you have a system with more than one CPU, say Y.
 546
 547           If you say N here, the kernel will run on single and multiprocessor
 548           machines, but will use only one CPU of a multiprocessor machine. If
 549           you say Y here, the kernel will run on many, but not all,
 550           singleprocessor machines. On a singleprocessor machine, the kernel
 551           will run faster if you say N here.
 552
 553           See also the SMP-HOWTO available at
 554           <http://www.tldp.org/docs.html#howto>.
 555
 556           If you don't know what to do here, say N.
 557
 558 config HAVE_DEC_LOCK
 559         bool
 560         depends on SMP
 561         default y
 562
 563 config NR_CPUS
 564         int "Maximum number of CPUs (2-32)"
 565         range 2 32
 566         depends on SMP
 567         default "32" if ALPHA_GENERIC || ALPHA_MARVEL
 568         default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
 569         help
 570           MARVEL support can handle a maximum of 32 CPUs, all the others
 571           with working support have a maximum of 4 CPUs.
 572
 573 config ARCH_DISCONTIGMEM_ENABLE
 574         bool "Discontiguous Memory Support (EXPERIMENTAL)"
 575         depends on EXPERIMENTAL
 576         help
 577           Say Y to support efficient handling of discontiguous physical memory,
 578           for architectures which are either NUMA (Non-Uniform Memory Access)
 579           or have huge holes in the physical address space for other reasons.
 580           See <file:Documentation/vm/numa> for more.
 581
 582 source "mm/Kconfig"
 583
 584 config NUMA
 585         bool "NUMA Support (EXPERIMENTAL)"
 586         depends on DISCONTIGMEM && BROKEN
 587         help
 588           Say Y to compile the kernel to support NUMA (Non-Uniform Memory
 589           Access).  This option is for configuring high-end multiprocessor
 590           server machines.  If in doubt, say N.
 591
 592 config NODES_SHIFT
 593         int
 594         default "7"
 595         depends on NEED_MULTIPLE_NODES
 596
 597 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
 598 config ALPHA_LARGE_VMALLOC
 599         bool
 600         ---help---
 601           Process creation and other aspects of virtual memory management can
 602           be streamlined if we restrict the kernel to one PGD for all vmalloc
 603           allocations.  This equates to about 8GB.
 604
 605           Under normal circumstances, this is so far and above what is needed
 606           as to be laughable.  However, there are certain applications (such
 607           as benchmark-grade in-kernel web serving) that can make use of as
 608           much vmalloc space as is available.
 609
 610           Say N unless you know you need gobs and gobs of vmalloc space.
 611
 612 config VERBOSE_MCHECK
 613         bool "Verbose Machine Checks"
 614
 615 config VERBOSE_MCHECK_ON
 616         int "Verbose Printing Mode (0=off, 1=on, 2=all)"
 617         depends on VERBOSE_MCHECK
 618         default 1
 619         ---help---
 620           This option allows the default printing mode to be set, and then
 621           possibly overridden by a boot command argument.
 622
 623           For example, if one wanted the option of printing verbose
 624           machine checks, but wanted the default to be as if verbose
 625           machine check printing was turned off, then one would choose
 626           the printing mode to be 0. Then, upon reboot, one could add
 627           the boot command line "verbose_mcheck=1" to get the normal
 628           verbose machine check printing, or "verbose_mcheck=2" to get
 629           the maximum information available.
 630
 631           Take the default (1) unless you want more control or more info.
 632
 633 config HZ
 634         int
 635         default 1200 if ALPHA_RAWHIDE
 636         default 1024
 637
 638 source "drivers/pci/Kconfig"
 639 source "drivers/eisa/Kconfig"
 640
 641 source "drivers/pcmcia/Kconfig"
 642
 643 config SRM_ENV
 644         tristate "SRM environment through procfs"
 645         depends on PROC_FS
 646         ---help---
 647           If you enable this option, a subdirectory inside /proc called
 648           /proc/srm_environment will give you access to the all important
 649           SRM environment variables (those which have a name) and also
 650           to all others (by their internal number).
 651
 652           SRM is something like a BIOS for Alpha machines. There are some
 653           other such BIOSes, like AlphaBIOS, which this driver cannot
 654           support (hey, that's not SRM!).
 655
 656           Despite the fact that this driver doesn't work on all Alphas (but
 657           only on those which have SRM as their firmware), it's save to
 658           build it even if your particular machine doesn't know about SRM
 659           (or if you intend to compile a generic kernel). It will simply
 660           not create those subdirectory in /proc (and give you some warning,
 661           of course).
 662
 663           This driver is also available as a module and will be called
 664           srm_env then.
 665
 666 source "fs/Kconfig.binfmt"
 667
 668 endmenu
 669
 670 source "net/Kconfig"
 671
 672 source "drivers/Kconfig"
 673
 674 source "fs/Kconfig"
 675
 676 source "arch/alpha/Kconfig.debug"
 677
 678 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
 679 # but we also need it if VGA_HOSE is set
 680 config DUMMY_CONSOLE
 681         bool
 682         depends on VGA_HOSE
 683         default y
 684
 685 source "security/Kconfig"
 686
 687 source "crypto/Kconfig"
 688
 689 source "lib/Kconfig"
 690