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