arch/alpha/Kconfig

   1 config ALPHA
   2         bool
   3         default y
   4         select HAVE_AOUT
   5         select HAVE_IDE
   6         select HAVE_OPROFILE
   7         select HAVE_SYSCALL_WRAPPERS
   8         select HAVE_IRQ_WORK
   9         select HAVE_PERF_EVENTS
  10         select HAVE_DMA_ATTRS
  11         select HAVE_GENERIC_HARDIRQS
  12         select GENERIC_IRQ_PROBE
  13         select AUTO_IRQ_AFFINITY if SMP
  14         select GENERIC_IRQ_SHOW
  15         select ARCH_WANT_OPTIONAL_GPIOLIB
  16         help
  17           The Alpha is a 64-bit general-purpose processor designed and
  18           marketed by the Digital Equipment Corporation of blessed memory,
  19           now Hewlett-Packard.  The Alpha Linux project has a home page at
  20           <http://www.alphalinux.org/>.
  21
  22 config 64BIT
  23         def_bool y
  24
  25 config MMU
  26         bool
  27         default y
  28
  29 config RWSEM_GENERIC_SPINLOCK
  30         bool
  31
  32 config RWSEM_XCHGADD_ALGORITHM
  33         bool
  34         default y
  35
  36 config ARCH_HAS_ILOG2_U32
  37         bool
  38         default n
  39
  40 config ARCH_HAS_ILOG2_U64
  41         bool
  42         default n
  43
  44 config GENERIC_FIND_NEXT_BIT
  45         bool
  46         default y
  47
  48 config GENERIC_CALIBRATE_DELAY
  49         bool
  50         default y
  51
  52 config GENERIC_CMOS_UPDATE
  53         def_bool y
  54
  55 config GENERIC_GPIO
  56         def_bool y
  57
  58 config ZONE_DMA
  59         bool
  60         default y
  61
  62 config ARCH_DMA_ADDR_T_64BIT
  63         def_bool y
  64
  65 config NEED_DMA_MAP_STATE
  66        def_bool y
  67
  68 config NEED_SG_DMA_LENGTH
  69         def_bool y
  70
  71 config GENERIC_ISA_DMA
  72         bool
  73         default y
  74
  75 config GENERIC_IOMAP
  76         bool
  77         default n
  78
  79 source "init/Kconfig"
  80 source "kernel/Kconfig.freezer"
  81
  82
  83 menu "System setup"
  84
  85 choice
  86         prompt "Alpha system type"
  87         default ALPHA_GENERIC
  88         ---help---
  89           This is the system type of your hardware.  A "generic" kernel will
  90           run on any supported Alpha system. However, if you configure a
  91           kernel for your specific system, it will be faster and smaller.
  92
  93           To find out what type of Alpha system you have, you may want to
  94           check out the Linux/Alpha FAQ, accessible on the WWW from
  95           <http://www.alphalinux.org/>. In summary:
  96
  97           Alcor/Alpha-XLT     AS 600, AS 500, XL-300, XL-366
  98           Alpha-XL            XL-233, XL-266
  99           AlphaBook1          Alpha laptop
 100           Avanti              AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
 101           Cabriolet           AlphaPC64, AlphaPCI64
 102           DP264               DP264 / DS20 / ES40 / DS10 / DS10L
 103           EB164               EB164 21164 evaluation board
 104           EB64+               EB64+ 21064 evaluation board
 105           EB66                EB66 21066 evaluation board
 106           EB66+               EB66+ 21066 evaluation board
 107           Jensen              DECpc 150, DEC 2000 models 300, 500
 108           LX164               AlphaPC164-LX
 109           Lynx                AS 2100A
 110           Miata               Personal Workstation 433/500/600 a/au
 111           Marvel              AlphaServer ES47 / ES80 / GS1280
 112           Mikasa              AS 1000
 113           Noname              AXPpci33, UDB (Multia)
 114           Noritake            AS 1000A, AS 600A, AS 800
 115           PC164               AlphaPC164
 116           Rawhide             AS 1200, AS 4000, AS 4100
 117           Ruffian             RPX164-2, AlphaPC164-UX, AlphaPC164-BX
 118           SX164               AlphaPC164-SX
 119           Sable               AS 2000, AS 2100
 120           Shark               DS 20L
 121           Takara              Takara (OEM)
 122           Titan               AlphaServer ES45 / DS25 / DS15
 123           Wildfire            AlphaServer GS 40/80/160/320
 124
 125           If you don't know what to do, choose "generic".
 126
 127 config ALPHA_GENERIC
 128         bool "Generic"
 129         help
 130           A generic kernel will run on all supported Alpha hardware.
 131
 132 config ALPHA_ALCOR
 133         bool "Alcor/Alpha-XLT"
 134         help
 135           For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
 136           slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
 137           Address, CIA) - a 383 pin plastic PGA).  It provides a DRAM
 138           controller (256-bit memory bus) and a PCI interface.  It also does
 139           all the work required to support an external Bcache and to maintain
 140           memory coherence when a PCI device DMAs into (or out of) memory.
 141
 142 config ALPHA_XL
 143         bool "Alpha-XL"
 144         help
 145           XL-233 and XL-266-based Alpha systems.
 146
 147 config ALPHA_BOOK1
 148         bool "AlphaBook1"
 149         help
 150           Dec AlphaBook1/Burns Alpha-based laptops.
 151
 152 config ALPHA_AVANTI_CH
 153         bool "Avanti"
 154
 155 config ALPHA_CABRIOLET
 156         bool "Cabriolet"
 157         help
 158           Cabriolet AlphaPC64, AlphaPCI64 systems.  Derived from EB64+ but now
 159           baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
 160           slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
 161           Bcache SIMMs.  Requires power supply with 3.3V output.
 162
 163 config ALPHA_DP264
 164         bool "DP264"
 165         help
 166           Various 21264 systems with the tsunami core logic chipset.
 167           API Networks: 264DP, UP2000(+), CS20;
 168           Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
 169
 170 config ALPHA_EB164
 171         bool "EB164"
 172         help
 173           EB164 21164 evaluation board from DEC.  Uses 21164 and ALCOR.  Has
 174           ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
 175           shared with an ISA slot) and 2 32-bit PCI slots.  Uses plus-in
 176           Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
 177           MOUSE (PS2 style), RTC/NVRAM.  Boot ROM is Flash.  PC-AT-sized
 178           motherboard.  Requires power supply with 3.3V output.
 179
 180 config ALPHA_EB64P_CH
 181         bool "EB64+"
 182
 183 config ALPHA_EB66
 184         bool "EB66"
 185         help
 186           A Digital DS group board.  Uses 21066 or 21066A.  I/O sub-system is
 187           identical to EB64+.  Baby PC-AT size.  Runs from standard PC power
 188           supply.  The EB66 schematic was published as a marketing poster
 189           advertising the 21066 as "the first microprocessor in the world with
 190           embedded PCI".
 191
 192 config ALPHA_EB66P
 193         bool "EB66+"
 194         help
 195           Later variant of the EB66 board.
 196
 197 config ALPHA_EIGER
 198         bool "Eiger"
 199         help
 200           Apparently an obscure OEM single-board computer based on the
 201           Typhoon/Tsunami chipset family. Information on it is scanty.
 202
 203 config ALPHA_JENSEN
 204         bool "Jensen"
 205         help
 206           DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
 207           of the first-generation Alpha systems. A number of these systems
 208           seem to be available on the second- hand market. The Jensen is a
 209           floor-standing tower system which originally used a 150MHz 21064 It
 210           used programmable logic to interface a 486 EISA I/O bridge to the
 211           CPU.
 212
 213 config ALPHA_LX164
 214         bool "LX164"
 215         help
 216           A technical overview of this board is available at
 217           <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
 218
 219 config ALPHA_LYNX
 220         bool "Lynx"
 221         help
 222           AlphaServer 2100A-based systems.
 223
 224 config ALPHA_MARVEL
 225         bool "Marvel"
 226         help
 227           AlphaServer ES47 / ES80 / GS1280 based on EV7.
 228
 229 config ALPHA_MIATA
 230         bool "Miata"
 231         help
 232           The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
 233           or 600au).
 234
 235 config ALPHA_MIKASA
 236         bool "Mikasa"
 237         help
 238           AlphaServer 1000-based Alpha systems.
 239
 240 config ALPHA_NAUTILUS
 241         bool "Nautilus"
 242         help
 243           Alpha systems based on the AMD 751 & ALI 1543C chipsets.
 244
 245 config ALPHA_NONAME_CH
 246         bool "Noname"
 247
 248 config ALPHA_NORITAKE
 249         bool "Noritake"
 250         help
 251           AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
 252           systems.
 253
 254 config ALPHA_PC164
 255         bool "PC164"
 256
 257 config ALPHA_P2K
 258         bool "Platform2000"
 259
 260 config ALPHA_RAWHIDE
 261         bool "Rawhide"
 262         help
 263           AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
 264           See HOWTO at
 265           <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
 266
 267 config ALPHA_RUFFIAN
 268         bool "Ruffian"
 269         help
 270           Samsung APC164UX.  There is a page on known problems and workarounds
 271           at <http://www.alphalinux.org/faq/FAQ-11.html>.
 272
 273 config ALPHA_RX164
 274         bool "RX164"
 275
 276 config ALPHA_SX164
 277         bool "SX164"
 278
 279 config ALPHA_SABLE
 280         bool "Sable"
 281         help
 282           Digital AlphaServer 2000 and 2100-based systems.
 283
 284 config ALPHA_SHARK
 285         bool "Shark"
 286
 287 config ALPHA_TAKARA
 288         bool "Takara"
 289         help
 290           Alpha 11164-based OEM single-board computer.
 291
 292 config ALPHA_TITAN
 293         bool "Titan"
 294         help
 295           AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
 296
 297 config ALPHA_WILDFIRE
 298         bool "Wildfire"
 299         help
 300           AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
 301
 302 endchoice
 303
 304 # clear all implied options (don't want default values for those):
 305 # Most of these machines have ISA slots; not exactly sure which don't,
 306 # and this doesn't activate hordes of code, so do it always.
 307 config ISA
 308         bool
 309         default y
 310         help
 311           Find out whether you have ISA slots on your motherboard.  ISA is the
 312           name of a bus system, i.e. the way the CPU talks to the other stuff
 313           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 314           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 315           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 316
 317 config ISA_DMA_API
 318         bool
 319         default y
 320
 321 config PCI
 322         bool
 323         depends on !ALPHA_JENSEN
 324         default y
 325         help
 326           Find out whether you have a PCI motherboard. PCI is the name of a
 327           bus system, i.e. the way the CPU talks to the other stuff inside
 328           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 329           VESA. If you have PCI, say Y, otherwise N.
 330
 331 config PCI_DOMAINS
 332         bool
 333         default y
 334
 335 config PCI_SYSCALL
 336         def_bool PCI
 337
 338 config IOMMU_HELPER
 339         def_bool PCI
 340
 341 config ALPHA_NONAME
 342         bool
 343         depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
 344         default y
 345         help
 346           The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
 347           UDB).  This design was produced by Digital's Technical OEM (TOEM)
 348           group. It uses the 21066 processor running at 166MHz or 233MHz. It
 349           is a baby-AT size, and runs from a standard PC power supply. It has
 350           5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
 351           2 versions, with either PS/2 or large DIN connectors for the
 352           keyboard.
 353
 354 config ALPHA_EV4
 355         bool
 356         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
 357         default y if !ALPHA_LYNX
 358
 359 config ALPHA_LCA
 360         bool
 361         depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
 362         default y
 363
 364 config ALPHA_APECS
 365         bool
 366         depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
 367         default y
 368
 369 config ALPHA_EB64P
 370         bool
 371         depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
 372         default y
 373         help
 374           Uses 21064 or 21064A and APECs.  Has ISA and PCI expansion (3 ISA,
 375           2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
 376           ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
 377           (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
 378           SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM.  PC-AT size.
 379           Runs from standard PC power supply.
 380
 381 config ALPHA_EV5
 382         bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
 383         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
 384
 385 config ALPHA_EV4
 386         bool
 387         default y if ALPHA_LYNX && !ALPHA_EV5
 388
 389 config ALPHA_CIA
 390         bool
 391         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
 392         default y
 393
 394 config ALPHA_EV56
 395         bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
 396         default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
 397
 398 config ALPHA_EV56
 399         prompt "EV56 CPU (speed >= 333MHz)?"
 400         depends on ALPHA_NORITAKE || ALPHA_PRIMO
 401
 402 config ALPHA_EV56
 403         prompt "EV56 CPU (speed >= 400MHz)?"
 404         depends on ALPHA_RAWHIDE
 405
 406 config ALPHA_PRIMO
 407         bool "EV5 CPU daughtercard (model 5/xxx)?"
 408         depends on ALPHA_NORITAKE || ALPHA_MIKASA
 409         help
 410           Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
 411
 412 config ALPHA_GAMMA
 413         bool "EV5 CPU(s) (model 5/xxx)?"
 414         depends on ALPHA_SABLE
 415         help
 416           Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
 417
 418 config ALPHA_GAMMA
 419         bool
 420         depends on ALPHA_LYNX
 421         default y
 422
 423 config ALPHA_T2
 424         bool
 425         depends on ALPHA_SABLE || ALPHA_LYNX
 426         default y
 427
 428 config ALPHA_PYXIS
 429         bool
 430         depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
 431         default y
 432
 433 config ALPHA_EV6
 434         bool
 435         depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
 436         default y
 437
 438 config ALPHA_TSUNAMI
 439         bool
 440         depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
 441         default y
 442
 443 config ALPHA_EV67
 444         bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
 445         default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
 446         help
 447           Is this a machine based on the EV67 core?  If in doubt, select N here
 448           and the machine will be treated as an EV6.
 449
 450 config ALPHA_EV7
 451         bool
 452         depends on ALPHA_MARVEL
 453         default y
 454
 455 config ALPHA_MCPCIA
 456         bool
 457         depends on ALPHA_RAWHIDE
 458         default y
 459
 460 config ALPHA_POLARIS
 461         bool
 462         depends on ALPHA_RX164
 463         default y
 464
 465 config ALPHA_IRONGATE
 466         bool
 467         depends on ALPHA_NAUTILUS
 468         default y
 469
 470 config GENERIC_HWEIGHT
 471         bool
 472         default y if !ALPHA_EV67
 473
 474 config ALPHA_AVANTI
 475         bool
 476         depends on ALPHA_XL || ALPHA_AVANTI_CH
 477         default y
 478         help
 479           Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
 480           Alphas. Info at
 481           <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
 482
 483 config ALPHA_BROKEN_IRQ_MASK
 484         bool
 485         depends on ALPHA_GENERIC || ALPHA_PC164
 486         default y
 487
 488 config VGA_HOSE
 489         bool
 490         depends on ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI
 491         default y
 492         help
 493           Support VGA on an arbitrary hose; needed for several platforms
 494           which always have multiple hoses, and whose consoles support it.
 495
 496
 497 config ALPHA_SRM
 498         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
 499         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
 500         ---help---
 501           There are two different types of booting firmware on Alphas: SRM,
 502           which is command line driven, and ARC, which uses menus and arrow
 503           keys. Details about the Linux/Alpha booting process are contained in
 504           the Linux/Alpha FAQ, accessible on the WWW from
 505           <http://www.alphalinux.org/>.
 506
 507           The usual way to load Linux on an Alpha machine is to use MILO
 508           (a bootloader that lets you pass command line parameters to the
 509           kernel just like lilo does for the x86 architecture) which can be
 510           loaded either from ARC or can be installed directly as a permanent
 511           firmware replacement from floppy (which requires changing a certain
 512           jumper on the motherboard). If you want to do either of these, say N
 513           here. If MILO doesn't work on your system (true for Jensen
 514           motherboards), you can bypass it altogether and boot Linux directly
 515           from an SRM console; say Y here in order to do that. Note that you
 516           won't be able to boot from an IDE disk using SRM.
 517
 518           If unsure, say N.
 519
 520 config EISA
 521         bool
 522         depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
 523         default y
 524
 525 config ARCH_MAY_HAVE_PC_FDC
 526         def_bool y
 527
 528 config SMP
 529         bool "Symmetric multi-processing support"
 530         depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
 531         select USE_GENERIC_SMP_HELPERS
 532         ---help---
 533           This enables support for systems with more than one CPU. If you have
 534           a system with only one CPU, like most personal computers, say N. If
 535           you have a system with more than one CPU, say Y.
 536
 537           If you say N here, the kernel will run on single and multiprocessor
 538           machines, but will use only one CPU of a multiprocessor machine. If
 539           you say Y here, the kernel will run on many, but not all,
 540           singleprocessor machines. On a singleprocessor machine, the kernel
 541           will run faster if you say N here.
 542
 543           See also the SMP-HOWTO available at
 544           <http://www.tldp.org/docs.html#howto>.
 545
 546           If you don't know what to do here, say N.
 547
 548 config HAVE_DEC_LOCK
 549         bool
 550         depends on SMP
 551         default y
 552
 553 config NR_CPUS
 554         int "Maximum number of CPUs (2-32)"
 555         range 2 32
 556         depends on SMP
 557         default "32" if ALPHA_GENERIC || ALPHA_MARVEL
 558         default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
 559         help
 560           MARVEL support can handle a maximum of 32 CPUs, all the others
 561           with working support have a maximum of 4 CPUs.
 562
 563 config ARCH_DISCONTIGMEM_ENABLE
 564         bool "Discontiguous Memory Support (EXPERIMENTAL)"
 565         depends on EXPERIMENTAL
 566         help
 567           Say Y to support efficient handling of discontiguous physical memory,
 568           for architectures which are either NUMA (Non-Uniform Memory Access)
 569           or have huge holes in the physical address space for other reasons.
 570           See <file:Documentation/vm/numa> for more.
 571
 572 source "mm/Kconfig"
 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 NODES_SHIFT
 583         int
 584         default "7"
 585         depends on NEED_MULTIPLE_NODES
 586
 587 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
 588 config ALPHA_LARGE_VMALLOC
 589         bool
 590         ---help---
 591           Process creation and other aspects of virtual memory management can
 592           be streamlined if we restrict the kernel to one PGD for all vmalloc
 593           allocations.  This equates to about 8GB.
 594
 595           Under normal circumstances, this is so far and above what is needed
 596           as to be laughable.  However, there are certain applications (such
 597           as benchmark-grade in-kernel web serving) that can make use of as
 598           much vmalloc space as is available.
 599
 600           Say N unless you know you need gobs and gobs of vmalloc space.
 601
 602 config VERBOSE_MCHECK
 603         bool "Verbose Machine Checks"
 604
 605 config VERBOSE_MCHECK_ON
 606         int "Verbose Printing Mode (0=off, 1=on, 2=all)"
 607         depends on VERBOSE_MCHECK
 608         default 1
 609         ---help---
 610           This option allows the default printing mode to be set, and then
 611           possibly overridden by a boot command argument.
 612
 613           For example, if one wanted the option of printing verbose
 614           machine checks, but wanted the default to be as if verbose
 615           machine check printing was turned off, then one would choose
 616           the printing mode to be 0. Then, upon reboot, one could add
 617           the boot command line "verbose_mcheck=1" to get the normal
 618           verbose machine check printing, or "verbose_mcheck=2" to get
 619           the maximum information available.
 620
 621           Take the default (1) unless you want more control or more info.
 622
 623 config HZ
 624         int
 625         default 1200 if ALPHA_RAWHIDE
 626         default 1024
 627
 628 source "drivers/pci/Kconfig"
 629 source "drivers/eisa/Kconfig"
 630
 631 source "drivers/pcmcia/Kconfig"
 632
 633 config SRM_ENV
 634         tristate "SRM environment through procfs"
 635         depends on PROC_FS
 636         ---help---
 637           If you enable this option, a subdirectory inside /proc called
 638           /proc/srm_environment will give you access to the all important
 639           SRM environment variables (those which have a name) and also
 640           to all others (by their internal number).
 641
 642           SRM is something like a BIOS for Alpha machines. There are some
 643           other such BIOSes, like AlphaBIOS, which this driver cannot
 644           support (hey, that's not SRM!).
 645
 646           Despite the fact that this driver doesn't work on all Alphas (but
 647           only on those which have SRM as their firmware), it's save to
 648           build it even if your particular machine doesn't know about SRM
 649           (or if you intend to compile a generic kernel). It will simply
 650           not create those subdirectory in /proc (and give you some warning,
 651           of course).
 652
 653           This driver is also available as a module and will be called
 654           srm_env then.
 655
 656 source "fs/Kconfig.binfmt"
 657
 658 endmenu
 659
 660 source "net/Kconfig"
 661
 662 source "drivers/Kconfig"
 663
 664 source "fs/Kconfig"
 665
 666 source "arch/alpha/Kconfig.debug"
 667
 668 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
 669 # but we also need it if VGA_HOSE is set
 670 config DUMMY_CONSOLE
 671         bool
 672         depends on VGA_HOSE
 673         default y
 674
 675 source "security/Kconfig"
 676
 677 source "crypto/Kconfig"
 678
 679 source "lib/Kconfig"
 680