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Linus Torvalds1da177e2005-04-16 15:20:36 -07001config ALPHA
2 bool
3 default y
David Woodhousee17c6d52008-06-17 12:19:34 +01004 select HAVE_AOUT
Sam Ravnborgec7748b2008-02-09 10:46:40 +01005 select HAVE_IDE
Mathieu Desnoyers42d4b832008-02-02 15:10:34 -05006 select HAVE_OPROFILE
Ivan Kokshayskye5d9a902009-01-29 14:25:18 -08007 select HAVE_SYSCALL_WRAPPERS
Peter Zijlstrae360adb2010-10-14 14:01:34 +08008 select HAVE_IRQ_WORK
Michael Creea582e6f2009-12-08 14:27:01 -05009 select HAVE_PERF_EVENTS
FUJITA Tomonoric186cac2010-03-10 15:23:37 -080010 select HAVE_DMA_ATTRS
Thomas Gleixnere27ec642011-01-19 20:27:11 +010011 select HAVE_GENERIC_HARDIRQS
12 select GENERIC_IRQ_PROBE
13 select AUTO_IRQ_AFFINITY if SMP
Thomas Gleixnera6e120e2011-03-25 22:20:51 +010014 select GENERIC_IRQ_SHOW
Mark Brown81ee42b2011-05-24 17:12:57 -070015 select ARCH_WANT_OPTIONAL_GPIOLIB
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 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
22config 64BIT
23 def_bool y
24
25config MMU
26 bool
27 default y
28
Linus Torvalds1da177e2005-04-16 15:20:36 -070029config RWSEM_GENERIC_SPINLOCK
30 bool
31
32config RWSEM_XCHGADD_ALGORITHM
33 bool
34 default y
35
David Howellsf0d1b0b2006-12-08 02:37:49 -080036config ARCH_HAS_ILOG2_U32
37 bool
38 default n
39
40config ARCH_HAS_ILOG2_U64
41 bool
42 default n
43
Akinobu Mitaf7c29672006-03-26 01:39:18 -080044config GENERIC_FIND_NEXT_BIT
45 bool
46 default y
47
Linus Torvalds1da177e2005-04-16 15:20:36 -070048config GENERIC_CALIBRATE_DELAY
49 bool
50 default y
51
John Stultz1e871be2010-03-03 19:57:16 -080052config GENERIC_CMOS_UPDATE
53 def_bool y
54
Mark Brown81ee42b2011-05-24 17:12:57 -070055config GENERIC_GPIO
56 def_bool y
57
Christoph Lameter5ac6da62007-02-10 01:43:14 -080058config ZONE_DMA
59 bool
60 default y
61
FUJITA Tomonori947272d2010-10-26 14:22:15 -070062config ARCH_DMA_ADDR_T_64BIT
63 def_bool y
64
FUJITA Tomonori08d925b2010-03-10 15:23:23 -080065config NEED_DMA_MAP_STATE
66 def_bool y
67
FUJITA Tomonori48c7cf42010-05-26 14:44:34 -070068config NEED_SG_DMA_LENGTH
69 def_bool y
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071config GENERIC_ISA_DMA
72 bool
73 default y
74
75config GENERIC_IOMAP
76 bool
77 default n
78
79source "init/Kconfig"
Matt Helsleydc52ddc2008-10-18 20:27:21 -070080source "kernel/Kconfig.freezer"
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
82
83menu "System setup"
84
85choice
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
Jay Estabrookd7083172007-06-01 00:47:05 -070097 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 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
Jay Estabrookd7083172007-06-01 00:47:05 -0700102 DP264 DP264 / DS20 / ES40 / DS10 / DS10L
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 EB164 EB164 21164 evaluation board
104 EB64+ EB64+ 21064 evaluation board
105 EB66 EB66 21066 evaluation board
106 EB66+ EB66+ 21066 evaluation board
Jay Estabrookd7083172007-06-01 00:47:05 -0700107 Jensen DECpc 150, DEC 2000 models 300, 500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 LX164 AlphaPC164-LX
109 Lynx AS 2100A
Jay Estabrookd7083172007-06-01 00:47:05 -0700110 Miata Personal Workstation 433/500/600 a/au
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 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
Jay Estabrookd7083172007-06-01 00:47:05 -0700120 Shark DS 20L
121 Takara Takara (OEM)
122 Titan AlphaServer ES45 / DS25 / DS15
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 Wildfire AlphaServer GS 40/80/160/320
124
125 If you don't know what to do, choose "generic".
126
127config ALPHA_GENERIC
128 bool "Generic"
129 help
130 A generic kernel will run on all supported Alpha hardware.
131
132config 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
142config ALPHA_XL
143 bool "Alpha-XL"
144 help
145 XL-233 and XL-266-based Alpha systems.
146
147config ALPHA_BOOK1
148 bool "AlphaBook1"
149 help
150 Dec AlphaBook1/Burns Alpha-based laptops.
151
152config ALPHA_AVANTI_CH
153 bool "Avanti"
154
155config 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
163config 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
170config 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
180config ALPHA_EB64P_CH
181 bool "EB64+"
182
183config 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
192config ALPHA_EB66P
193 bool "EB66+"
194 help
195 Later variant of the EB66 board.
196
197config 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
203config 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
213config 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
219config ALPHA_LYNX
220 bool "Lynx"
221 help
222 AlphaServer 2100A-based systems.
223
224config ALPHA_MARVEL
225 bool "Marvel"
226 help
227 AlphaServer ES47 / ES80 / GS1280 based on EV7.
228
229config ALPHA_MIATA
230 bool "Miata"
231 help
232 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
Adrian Bunkffc32d62008-10-15 22:01:19 -0700233 or 600au).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
235config ALPHA_MIKASA
236 bool "Mikasa"
237 help
238 AlphaServer 1000-based Alpha systems.
239
240config ALPHA_NAUTILUS
241 bool "Nautilus"
242 help
243 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
244
245config ALPHA_NONAME_CH
246 bool "Noname"
247
248config ALPHA_NORITAKE
249 bool "Noritake"
250 help
251 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
252 systems.
253
254config ALPHA_PC164
255 bool "PC164"
256
257config ALPHA_P2K
258 bool "Platform2000"
259
260config 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
267config 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
273config ALPHA_RX164
274 bool "RX164"
275
276config ALPHA_SX164
277 bool "SX164"
278
279config ALPHA_SABLE
280 bool "Sable"
281 help
282 Digital AlphaServer 2000 and 2100-based systems.
283
284config ALPHA_SHARK
285 bool "Shark"
286
287config ALPHA_TAKARA
288 bool "Takara"
289 help
290 Alpha 11164-based OEM single-board computer.
291
292config ALPHA_TITAN
293 bool "Titan"
294 help
295 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
296
297config ALPHA_WILDFIRE
298 bool "Wildfire"
299 help
300 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
301
302endchoice
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.
307config 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
Al Viro5cae8412005-05-04 05:39:22 +0100317config ISA_DMA_API
318 bool
319 default y
320
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321config 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331config PCI_DOMAINS
332 bool
333 default y
334
Matthew Wilcox36e23592007-07-10 10:54:40 -0600335config PCI_SYSCALL
336 def_bool PCI
337
FUJITA Tomonorifd288412008-03-13 12:32:40 -0700338config IOMMU_HELPER
339 def_bool PCI
340
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341config 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
354config 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
359config ALPHA_LCA
360 bool
361 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
362 default y
363
364config 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
369config 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
381config 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
385config ALPHA_EV4
386 bool
387 default y if ALPHA_LYNX && !ALPHA_EV5
388
389config 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
394config 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
398config ALPHA_EV56
399 prompt "EV56 CPU (speed >= 333MHz)?"
Fernando J. Pereda060ec3d2006-09-25 23:32:37 -0700400 depends on ALPHA_NORITAKE || ALPHA_PRIMO
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
402config ALPHA_EV56
403 prompt "EV56 CPU (speed >= 400MHz)?"
404 depends on ALPHA_RAWHIDE
405
406config 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
412config 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
418config ALPHA_GAMMA
419 bool
420 depends on ALPHA_LYNX
421 default y
422
423config ALPHA_T2
424 bool
425 depends on ALPHA_SABLE || ALPHA_LYNX
426 default y
427
428config ALPHA_PYXIS
429 bool
430 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
431 default y
432
433config 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
438config ALPHA_TSUNAMI
439 bool
440 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
441 default y
442
443config 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
450config ALPHA_EV7
451 bool
452 depends on ALPHA_MARVEL
453 default y
454
455config ALPHA_MCPCIA
456 bool
457 depends on ALPHA_RAWHIDE
458 default y
459
460config ALPHA_POLARIS
461 bool
462 depends on ALPHA_RX164
463 default y
464
465config ALPHA_IRONGATE
466 bool
467 depends on ALPHA_NAUTILUS
468 default y
469
Akinobu Mitaf7c29672006-03-26 01:39:18 -0800470config GENERIC_HWEIGHT
471 bool
Randy Dunlap5e625b02006-06-12 15:13:40 -0700472 default y if !ALPHA_EV67
Akinobu Mitaf7c29672006-03-26 01:39:18 -0800473
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474config 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
483config ALPHA_BROKEN_IRQ_MASK
484 bool
485 depends on ALPHA_GENERIC || ALPHA_PC164
486 default y
487
Jay Estabrook025a2212007-06-01 00:47:03 -0700488config 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497config 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
520config 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
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100525config ARCH_MAY_HAVE_PC_FDC
526 def_bool y
527
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528config 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
Jens Axboec524a1d2008-06-10 20:47:29 +0200531 select USE_GENERIC_SMP_HELPERS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 ---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
Adrian Bunk03502fa2008-02-03 15:50:21 +0200543 See also the SMP-HOWTO available at
544 <http://www.tldp.org/docs.html#howto>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545
546 If you don't know what to do here, say N.
547
548config HAVE_DEC_LOCK
549 bool
550 depends on SMP
551 default y
552
553config NR_CPUS
Jay Estabrookd7083172007-06-01 00:47:05 -0700554 int "Maximum number of CPUs (2-32)"
555 range 2 32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 depends on SMP
Jay Estabrookd7083172007-06-01 00:47:05 -0700557 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562
Dave Hansen3f22ab22005-06-23 00:07:43 -0700563config ARCH_DISCONTIGMEM_ENABLE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 bool "Discontiguous Memory Support (EXPERIMENTAL)"
565 depends on EXPERIMENTAL
566 help
Matt LaPlantefc31e832006-10-03 22:23:47 +0200567 Say Y to support efficient handling of discontiguous physical memory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 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
Dave Hansen3f22ab22005-06-23 00:07:43 -0700572source "mm/Kconfig"
573
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574config NUMA
575 bool "NUMA Support (EXPERIMENTAL)"
Al Viro6df7c992005-08-23 22:44:50 +0100576 depends on DISCONTIGMEM && BROKEN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 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
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700582config NODES_SHIFT
583 int
584 default "7"
585 depends on NEED_MULTIPLE_NODES
586
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587# LARGE_VMALLOC is racy, if you *really* need it then fix it first
588config 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
602config VERBOSE_MCHECK
603 bool "Verbose Machine Checks"
604
605config 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
H. Peter Anvinbdc80782008-02-08 04:21:26 -0800623config HZ
624 int
625 default 1200 if ALPHA_RAWHIDE
626 default 1024
627
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628source "drivers/pci/Kconfig"
629source "drivers/eisa/Kconfig"
630
631source "drivers/pcmcia/Kconfig"
632
633config 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
656source "fs/Kconfig.binfmt"
657
658endmenu
659
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700660source "net/Kconfig"
661
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662source "drivers/Kconfig"
663
664source "fs/Kconfig"
665
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666source "arch/alpha/Kconfig.debug"
667
Jay Estabrook025a2212007-06-01 00:47:03 -0700668# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
669# but we also need it if VGA_HOSE is set
670config DUMMY_CONSOLE
671 bool
672 depends on VGA_HOSE
673 default y
674
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675source "security/Kconfig"
676
677source "crypto/Kconfig"
678
679source "lib/Kconfig"
680