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