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 GENERIC_CMOS_UPDATE
  55         def_bool y
  56
  57 config ZONE_DMA
  58         bool
  59         default y
  60
  61 config NEED_DMA_MAP_STATE
  62        def_bool y
  63
  64 config NEED_SG_DMA_LENGTH
  65         def_bool y
  66
  67 config GENERIC_ISA_DMA
  68         bool
  69         default y
  70
  71 config GENERIC_IOMAP
  72         bool
  73         default n
  74
  75 config GENERIC_HARDIRQS
  76         bool
  77         default y
  78
  79 config GENERIC_IRQ_PROBE
  80         bool
  81         default y
  82
  83 config AUTO_IRQ_AFFINITY
  84         bool
  85         depends on SMP
  86         default y
  87
  88 source "init/Kconfig"
  89 source "kernel/Kconfig.freezer"
  90
  91
  92 menu "System setup"
  93
  94 choice
  95         prompt "Alpha system type"
  96         default ALPHA_GENERIC
  97         ---help---
  98           This is the system type of your hardware.  A "generic" kernel will
  99           run on any supported Alpha system. However, if you configure a
 100           kernel for your specific system, it will be faster and smaller.
 101
 102           To find out what type of Alpha system you have, you may want to
 103           check out the Linux/Alpha FAQ, accessible on the WWW from
 104           <http://www.alphalinux.org/>. In summary:
 105
 106           Alcor/Alpha-XLT     AS 600, AS 500, XL-300, XL-366
 107           Alpha-XL            XL-233, XL-266
 108           AlphaBook1          Alpha laptop
 109           Avanti              AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
 110           Cabriolet           AlphaPC64, AlphaPCI64
 111           DP264               DP264 / DS20 / ES40 / DS10 / DS10L
 112           EB164               EB164 21164 evaluation board
 113           EB64+               EB64+ 21064 evaluation board
 114           EB66                EB66 21066 evaluation board
 115           EB66+               EB66+ 21066 evaluation board
 116           Jensen              DECpc 150, DEC 2000 models 300, 500
 117           LX164               AlphaPC164-LX
 118           Lynx                AS 2100A
 119           Miata               Personal Workstation 433/500/600 a/au
 120           Marvel              AlphaServer ES47 / ES80 / GS1280
 121           Mikasa              AS 1000
 122           Noname              AXPpci33, UDB (Multia)
 123           Noritake            AS 1000A, AS 600A, AS 800
 124           PC164               AlphaPC164
 125           Rawhide             AS 1200, AS 4000, AS 4100
 126           Ruffian             RPX164-2, AlphaPC164-UX, AlphaPC164-BX
 127           SX164               AlphaPC164-SX
 128           Sable               AS 2000, AS 2100
 129           Shark               DS 20L
 130           Takara              Takara (OEM)
 131           Titan               AlphaServer ES45 / DS25 / DS15
 132           Wildfire            AlphaServer GS 40/80/160/320
 133
 134           If you don't know what to do, choose "generic".
 135
 136 config ALPHA_GENERIC
 137         bool "Generic"
 138         help
 139           A generic kernel will run on all supported Alpha hardware.
 140
 141 config ALPHA_ALCOR
 142         bool "Alcor/Alpha-XLT"
 143         help
 144           For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
 145           slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
 146           Address, CIA) - a 383 pin plastic PGA).  It provides a DRAM
 147           controller (256-bit memory bus) and a PCI interface.  It also does
 148           all the work required to support an external Bcache and to maintain
 149           memory coherence when a PCI device DMAs into (or out of) memory.
 150
 151 config ALPHA_XL
 152         bool "Alpha-XL"
 153         help
 154           XL-233 and XL-266-based Alpha systems.
 155
 156 config ALPHA_BOOK1
 157         bool "AlphaBook1"
 158         help
 159           Dec AlphaBook1/Burns Alpha-based laptops.
 160
 161 config ALPHA_AVANTI_CH
 162         bool "Avanti"
 163
 164 config ALPHA_CABRIOLET
 165         bool "Cabriolet"
 166         help
 167           Cabriolet AlphaPC64, AlphaPCI64 systems.  Derived from EB64+ but now
 168           baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
 169           slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
 170           Bcache SIMMs.  Requires power supply with 3.3V output.
 171
 172 config ALPHA_DP264
 173         bool "DP264"
 174         help
 175           Various 21264 systems with the tsunami core logic chipset.
 176           API Networks: 264DP, UP2000(+), CS20;
 177           Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
 178
 179 config ALPHA_EB164
 180         bool "EB164"
 181         help
 182           EB164 21164 evaluation board from DEC.  Uses 21164 and ALCOR.  Has
 183           ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
 184           shared with an ISA slot) and 2 32-bit PCI slots.  Uses plus-in
 185           Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
 186           MOUSE (PS2 style), RTC/NVRAM.  Boot ROM is Flash.  PC-AT-sized
 187           motherboard.  Requires power supply with 3.3V output.
 188
 189 config ALPHA_EB64P_CH
 190         bool "EB64+"
 191
 192 config ALPHA_EB66
 193         bool "EB66"
 194         help
 195           A Digital DS group board.  Uses 21066 or 21066A.  I/O sub-system is
 196           identical to EB64+.  Baby PC-AT size.  Runs from standard PC power
 197           supply.  The EB66 schematic was published as a marketing poster
 198           advertising the 21066 as "the first microprocessor in the world with
 199           embedded PCI".
 200
 201 config ALPHA_EB66P
 202         bool "EB66+"
 203         help
 204           Later variant of the EB66 board.
 205
 206 config ALPHA_EIGER
 207         bool "Eiger"
 208         help
 209           Apparently an obscure OEM single-board computer based on the
 210           Typhoon/Tsunami chipset family. Information on it is scanty.
 211
 212 config ALPHA_JENSEN
 213         bool "Jensen"
 214         help
 215           DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
 216           of the first-generation Alpha systems. A number of these systems
 217           seem to be available on the second- hand market. The Jensen is a
 218           floor-standing tower system which originally used a 150MHz 21064 It
 219           used programmable logic to interface a 486 EISA I/O bridge to the
 220           CPU.
 221
 222 config ALPHA_LX164
 223         bool "LX164"
 224         help
 225           A technical overview of this board is available at
 226           <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
 227
 228 config ALPHA_LYNX
 229         bool "Lynx"
 230         help
 231           AlphaServer 2100A-based systems.
 232
 233 config ALPHA_MARVEL
 234         bool "Marvel"
 235         help
 236           AlphaServer ES47 / ES80 / GS1280 based on EV7.
 237
 238 config ALPHA_MIATA
 239         bool "Miata"
 240         help
 241           The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
 242           or 600au).
 243
 244 config ALPHA_MIKASA
 245         bool "Mikasa"
 246         help
 247           AlphaServer 1000-based Alpha systems.
 248
 249 config ALPHA_NAUTILUS
 250         bool "Nautilus"
 251         help
 252           Alpha systems based on the AMD 751 & ALI 1543C chipsets.
 253
 254 config ALPHA_NONAME_CH
 255         bool "Noname"
 256
 257 config ALPHA_NORITAKE
 258         bool "Noritake"
 259         help
 260           AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
 261           systems.
 262
 263 config ALPHA_PC164
 264         bool "PC164"
 265
 266 config ALPHA_P2K
 267         bool "Platform2000"
 268
 269 config ALPHA_RAWHIDE
 270         bool "Rawhide"
 271         help
 272           AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
 273           See HOWTO at
 274           <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
 275
 276 config ALPHA_RUFFIAN
 277         bool "Ruffian"
 278         help
 279           Samsung APC164UX.  There is a page on known problems and workarounds
 280           at <http://www.alphalinux.org/faq/FAQ-11.html>.
 281
 282 config ALPHA_RX164
 283         bool "RX164"
 284
 285 config ALPHA_SX164
 286         bool "SX164"
 287
 288 config ALPHA_SABLE
 289         bool "Sable"
 290         help
 291           Digital AlphaServer 2000 and 2100-based systems.
 292
 293 config ALPHA_SHARK
 294         bool "Shark"
 295
 296 config ALPHA_TAKARA
 297         bool "Takara"
 298         help
 299           Alpha 11164-based OEM single-board computer.
 300
 301 config ALPHA_TITAN
 302         bool "Titan"
 303         help
 304           AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
 305
 306 config ALPHA_WILDFIRE
 307         bool "Wildfire"
 308         help
 309           AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
 310
 311 endchoice
 312
 313 # clear all implied options (don't want default values for those):
 314 # Most of these machines have ISA slots; not exactly sure which don't,
 315 # and this doesn't activate hordes of code, so do it always.
 316 config ISA
 317         bool
 318         default y
 319         help
 320           Find out whether you have ISA slots on your motherboard.  ISA is the
 321           name of a bus system, i.e. the way the CPU talks to the other stuff
 322           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 323           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 324           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 325
 326 config ISA_DMA_API
 327         bool
 328         default y
 329
 330 config PCI
 331         bool
 332         depends on !ALPHA_JENSEN
 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_EV7
 460         bool
 461         depends on ALPHA_MARVEL
 462         default y
 463
 464 config ALPHA_MCPCIA
 465         bool
 466         depends on ALPHA_RAWHIDE
 467         default y
 468
 469 config ALPHA_POLARIS
 470         bool
 471         depends on ALPHA_RX164
 472         default y
 473
 474 config ALPHA_IRONGATE
 475         bool
 476         depends on ALPHA_NAUTILUS
 477         default y
 478
 479 config GENERIC_HWEIGHT
 480         bool
 481         default y if !ALPHA_EV67
 482
 483 config ALPHA_AVANTI
 484         bool
 485         depends on ALPHA_XL || ALPHA_AVANTI_CH
 486         default y
 487         help
 488           Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
 489           Alphas. Info at
 490           <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
 491
 492 config ALPHA_BROKEN_IRQ_MASK
 493         bool
 494         depends on ALPHA_GENERIC || ALPHA_PC164
 495         default y
 496
 497 config VGA_HOSE
 498         bool
 499         depends on ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI
 500         default y
 501         help
 502           Support VGA on an arbitrary hose; needed for several platforms
 503           which always have multiple hoses, and whose consoles support it.
 504
 505
 506 config ALPHA_SRM
 507         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
 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         select USE_GENERIC_SMP_HELPERS
 541         ---help---
 542           This enables support for systems with more than one CPU. If you have
 543           a system with only one CPU, like most personal computers, say N. If
 544           you have a system with more than one CPU, say Y.
 545
 546           If you say N here, the kernel will run on single and multiprocessor
 547           machines, but will use only one CPU of a multiprocessor machine. If
 548           you say Y here, the kernel will run on many, but not all,
 549           singleprocessor machines. On a singleprocessor machine, the kernel
 550           will run faster if you say N here.
 551
 552           See also the SMP-HOWTO available at
 553           <http://www.tldp.org/docs.html#howto>.
 554
 555           If you don't know what to do here, say N.
 556
 557 config HAVE_DEC_LOCK
 558         bool
 559         depends on SMP
 560         default y
 561
 562 config NR_CPUS
 563         int "Maximum number of CPUs (2-32)"
 564         range 2 32
 565         depends on SMP
 566         default "32" if ALPHA_GENERIC || ALPHA_MARVEL
 567         default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
 568         help
 569           MARVEL support can handle a maximum of 32 CPUs, all the others
 570           with working support have a maximum of 4 CPUs.
 571
 572 config ARCH_DISCONTIGMEM_ENABLE
 573         bool "Discontiguous Memory Support (EXPERIMENTAL)"
 574         depends on EXPERIMENTAL
 575         help
 576           Say Y to support efficient handling of discontiguous physical memory,
 577           for architectures which are either NUMA (Non-Uniform Memory Access)
 578           or have huge holes in the physical address space for other reasons.
 579           See <file:Documentation/vm/numa> for more.
 580
 581 source "mm/Kconfig"
 582
 583 config NUMA
 584         bool "NUMA Support (EXPERIMENTAL)"
 585         depends on DISCONTIGMEM && BROKEN
 586         help
 587           Say Y to compile the kernel to support NUMA (Non-Uniform Memory
 588           Access).  This option is for configuring high-end multiprocessor
 589           server machines.  If in doubt, say N.
 590
 591 config NODES_SHIFT
 592         int
 593         default "7"
 594         depends on NEED_MULTIPLE_NODES
 595
 596 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
 597 config ALPHA_LARGE_VMALLOC
 598         bool
 599         ---help---
 600           Process creation and other aspects of virtual memory management can
 601           be streamlined if we restrict the kernel to one PGD for all vmalloc
 602           allocations.  This equates to about 8GB.
 603
 604           Under normal circumstances, this is so far and above what is needed
 605           as to be laughable.  However, there are certain applications (such
 606           as benchmark-grade in-kernel web serving) that can make use of as
 607           much vmalloc space as is available.
 608
 609           Say N unless you know you need gobs and gobs of vmalloc space.
 610
 611 config VERBOSE_MCHECK
 612         bool "Verbose Machine Checks"
 613
 614 config VERBOSE_MCHECK_ON
 615         int "Verbose Printing Mode (0=off, 1=on, 2=all)"
 616         depends on VERBOSE_MCHECK
 617         default 1
 618         ---help---
 619           This option allows the default printing mode to be set, and then
 620           possibly overridden by a boot command argument.
 621
 622           For example, if one wanted the option of printing verbose
 623           machine checks, but wanted the default to be as if verbose
 624           machine check printing was turned off, then one would choose
 625           the printing mode to be 0. Then, upon reboot, one could add
 626           the boot command line "verbose_mcheck=1" to get the normal
 627           verbose machine check printing, or "verbose_mcheck=2" to get
 628           the maximum information available.
 629
 630           Take the default (1) unless you want more control or more info.
 631
 632 config HZ
 633         int
 634         default 1200 if ALPHA_RAWHIDE
 635         default 1024
 636
 637 source "drivers/pci/Kconfig"
 638 source "drivers/eisa/Kconfig"
 639
 640 source "drivers/pcmcia/Kconfig"
 641
 642 config SRM_ENV
 643         tristate "SRM environment through procfs"
 644         depends on PROC_FS
 645         ---help---
 646           If you enable this option, a subdirectory inside /proc called
 647           /proc/srm_environment will give you access to the all important
 648           SRM environment variables (those which have a name) and also
 649           to all others (by their internal number).
 650
 651           SRM is something like a BIOS for Alpha machines. There are some
 652           other such BIOSes, like AlphaBIOS, which this driver cannot
 653           support (hey, that's not SRM!).
 654
 655           Despite the fact that this driver doesn't work on all Alphas (but
 656           only on those which have SRM as their firmware), it's save to
 657           build it even if your particular machine doesn't know about SRM
 658           (or if you intend to compile a generic kernel). It will simply
 659           not create those subdirectory in /proc (and give you some warning,
 660           of course).
 661
 662           This driver is also available as a module and will be called
 663           srm_env then.
 664
 665 source "fs/Kconfig.binfmt"
 666
 667 endmenu
 668
 669 source "net/Kconfig"
 670
 671 source "drivers/Kconfig"
 672
 673 source "fs/Kconfig"
 674
 675 source "arch/alpha/Kconfig.debug"
 676
 677 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
 678 # but we also need it if VGA_HOSE is set
 679 config DUMMY_CONSOLE
 680         bool
 681         depends on VGA_HOSE
 682         default y
 683
 684 source "security/Kconfig"
 685
 686 source "crypto/Kconfig"
 687
 688 source "lib/Kconfig"
 689