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