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Linux/arch/alpha/Kconfig

  1 config ALPHA
  2         bool
  3         default y
  4         select ARCH_MIGHT_HAVE_PC_PARPORT
  5         select ARCH_MIGHT_HAVE_PC_SERIO
  6         select HAVE_AOUT
  7         select HAVE_IDE
  8         select HAVE_OPROFILE
  9         select HAVE_PCSPKR_PLATFORM
 10         select HAVE_PERF_EVENTS
 11         select HAVE_DMA_ATTRS
 12         select VIRT_TO_BUS
 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_WANT_IPC_PARSE_VERSION
 18         select ARCH_HAVE_NMI_SAFE_CMPXCHG
 19         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 20         select AUDIT_ARCH
 21         select GENERIC_CLOCKEVENTS
 22         select GENERIC_SMP_IDLE_THREAD
 23         select GENERIC_STRNCPY_FROM_USER
 24         select GENERIC_STRNLEN_USER
 25         select HAVE_ARCH_AUDITSYSCALL
 26         select HAVE_MOD_ARCH_SPECIFIC
 27         select MODULES_USE_ELF_RELA
 28         select ODD_RT_SIGACTION
 29         select OLD_SIGSUSPEND
 30         help
 31           The Alpha is a 64-bit general-purpose processor designed and
 32           marketed by the Digital Equipment Corporation of blessed memory,
 33           now Hewlett-Packard.  The Alpha Linux project has a home page at
 34           <http://www.alphalinux.org/>.
 35 
 36 config 64BIT
 37         def_bool y
 38 
 39 config MMU
 40         bool
 41         default y
 42 
 43 config RWSEM_GENERIC_SPINLOCK
 44         bool
 45 
 46 config RWSEM_XCHGADD_ALGORITHM
 47         bool
 48         default y
 49 
 50 config ARCH_HAS_ILOG2_U32
 51         bool
 52         default n
 53 
 54 config ARCH_HAS_ILOG2_U64
 55         bool
 56         default n
 57 
 58 config GENERIC_CALIBRATE_DELAY
 59         bool
 60         default y
 61 
 62 config ZONE_DMA
 63         bool
 64         default y
 65 
 66 config ARCH_DMA_ADDR_T_64BIT
 67         def_bool y
 68 
 69 config NEED_DMA_MAP_STATE
 70        def_bool y
 71 
 72 config NEED_SG_DMA_LENGTH
 73         def_bool y
 74 
 75 config GENERIC_ISA_DMA
 76         bool
 77         default y
 78 
 79 source "init/Kconfig"
 80 source "kernel/Kconfig.freezer"
 81 
 82 config AUDIT_ARCH
 83         bool
 84 
 85 menu "System setup"
 86 
 87 choice
 88         prompt "Alpha system type"
 89         default ALPHA_GENERIC
 90         ---help---
 91           This is the system type of your hardware.  A "generic" kernel will
 92           run on any supported Alpha system. However, if you configure a
 93           kernel for your specific system, it will be faster and smaller.
 94 
 95           To find out what type of Alpha system you have, you may want to
 96           check out the Linux/Alpha FAQ, accessible on the WWW from
 97           <http://www.alphalinux.org/>. In summary:
 98 
 99           Alcor/Alpha-XLT     AS 600, AS 500, XL-300, XL-366
100           Alpha-XL            XL-233, XL-266
101           AlphaBook1          Alpha laptop
102           Avanti              AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
103           Cabriolet           AlphaPC64, AlphaPCI64
104           DP264               DP264 / DS20 / ES40 / DS10 / DS10L
105           EB164               EB164 21164 evaluation board
106           EB64+               EB64+ 21064 evaluation board
107           EB66                EB66 21066 evaluation board
108           EB66+               EB66+ 21066 evaluation board
109           Jensen              DECpc 150, DEC 2000 models 300, 500
110           LX164               AlphaPC164-LX
111           Lynx                AS 2100A
112           Miata               Personal Workstation 433/500/600 a/au
113           Marvel              AlphaServer ES47 / ES80 / GS1280
114           Mikasa              AS 1000
115           Noname              AXPpci33, UDB (Multia)
116           Noritake            AS 1000A, AS 600A, AS 800
117           PC164               AlphaPC164
118           Rawhide             AS 1200, AS 4000, AS 4100
119           Ruffian             RPX164-2, AlphaPC164-UX, AlphaPC164-BX
120           SX164               AlphaPC164-SX
121           Sable               AS 2000, AS 2100
122           Shark               DS 20L
123           Takara              Takara (OEM)
124           Titan               AlphaServer ES45 / DS25 / DS15
125           Wildfire            AlphaServer GS 40/80/160/320
126 
127           If you don't know what to do, choose "generic".
128 
129 config ALPHA_GENERIC
130         bool "Generic"
131         depends on TTY
132         help
133           A generic kernel will run on all supported Alpha hardware.
134 
135 config ALPHA_ALCOR
136         bool "Alcor/Alpha-XLT"
137         help
138           For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
139           slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
140           Address, CIA) - a 383 pin plastic PGA).  It provides a DRAM
141           controller (256-bit memory bus) and a PCI interface.  It also does
142           all the work required to support an external Bcache and to maintain
143           memory coherence when a PCI device DMAs into (or out of) memory.
144 
145 config ALPHA_XL
146         bool "Alpha-XL"
147         help
148           XL-233 and XL-266-based Alpha systems.
149 
150 config ALPHA_BOOK1
151         bool "AlphaBook1"
152         help
153           Dec AlphaBook1/Burns Alpha-based laptops.
154 
155 config ALPHA_AVANTI_CH
156         bool "Avanti"
157 
158 config ALPHA_CABRIOLET
159         bool "Cabriolet"
160         help
161           Cabriolet AlphaPC64, AlphaPCI64 systems.  Derived from EB64+ but now
162           baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
163           slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
164           Bcache SIMMs.  Requires power supply with 3.3V output.
165 
166 config ALPHA_DP264
167         bool "DP264"
168         help
169           Various 21264 systems with the tsunami core logic chipset.
170           API Networks: 264DP, UP2000(+), CS20;
171           Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
172 
173 config ALPHA_EB164
174         bool "EB164"
175         help
176           EB164 21164 evaluation board from DEC.  Uses 21164 and ALCOR.  Has
177           ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
178           shared with an ISA slot) and 2 32-bit PCI slots.  Uses plus-in
179           Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
180           MOUSE (PS2 style), RTC/NVRAM.  Boot ROM is Flash.  PC-AT-sized
181           motherboard.  Requires power supply with 3.3V output.
182 
183 config ALPHA_EB64P_CH
184         bool "EB64+"
185 
186 config ALPHA_EB66
187         bool "EB66"
188         help
189           A Digital DS group board.  Uses 21066 or 21066A.  I/O sub-system is
190           identical to EB64+.  Baby PC-AT size.  Runs from standard PC power
191           supply.  The EB66 schematic was published as a marketing poster
192           advertising the 21066 as "the first microprocessor in the world with
193           embedded PCI".
194 
195 config ALPHA_EB66P
196         bool "EB66+"
197         help
198           Later variant of the EB66 board.
199 
200 config ALPHA_EIGER
201         bool "Eiger"
202         help
203           Apparently an obscure OEM single-board computer based on the
204           Typhoon/Tsunami chipset family. Information on it is scanty.
205 
206 config ALPHA_JENSEN
207         bool "Jensen"
208         help
209           DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
210           of the first-generation Alpha systems. A number of these systems
211           seem to be available on the second- hand market. The Jensen is a
212           floor-standing tower system which originally used a 150MHz 21064 It
213           used programmable logic to interface a 486 EISA I/O bridge to the
214           CPU.
215 
216 config ALPHA_LX164
217         bool "LX164"
218         help
219           A technical overview of this board is available at
220           <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
221 
222 config ALPHA_LYNX
223         bool "Lynx"
224         help
225           AlphaServer 2100A-based systems.
226 
227 config ALPHA_MARVEL
228         bool "Marvel"
229         help
230           AlphaServer ES47 / ES80 / GS1280 based on EV7.
231 
232 config ALPHA_MIATA
233         bool "Miata"
234         help
235           The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
236           or 600au).
237 
238 config ALPHA_MIKASA
239         bool "Mikasa"
240         help
241           AlphaServer 1000-based Alpha systems.
242 
243 config ALPHA_NAUTILUS
244         bool "Nautilus"
245         help
246           Alpha systems based on the AMD 751 & ALI 1543C chipsets.
247 
248 config ALPHA_NONAME_CH
249         bool "Noname"
250 
251 config ALPHA_NORITAKE
252         bool "Noritake"
253         help
254           AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
255           systems.
256 
257 config ALPHA_PC164
258         bool "PC164"
259 
260 config ALPHA_P2K
261         bool "Platform2000"
262 
263 config ALPHA_RAWHIDE
264         bool "Rawhide"
265         help
266           AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
267           See HOWTO at
268           <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
269 
270 config ALPHA_RUFFIAN
271         bool "Ruffian"
272         help
273           Samsung APC164UX.  There is a page on known problems and workarounds
274           at <http://www.alphalinux.org/faq/FAQ-11.html>.
275 
276 config ALPHA_RX164
277         bool "RX164"
278 
279 config ALPHA_SX164
280         bool "SX164"
281 
282 config ALPHA_SABLE
283         bool "Sable"
284         help
285           Digital AlphaServer 2000 and 2100-based systems.
286 
287 config ALPHA_SHARK
288         bool "Shark"
289 
290 config ALPHA_TAKARA
291         bool "Takara"
292         help
293           Alpha 11164-based OEM single-board computer.
294 
295 config ALPHA_TITAN
296         bool "Titan"
297         help
298           AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
299 
300 config ALPHA_WILDFIRE
301         bool "Wildfire"
302         help
303           AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
304 
305 endchoice
306 
307 # clear all implied options (don't want default values for those):
308 # Most of these machines have ISA slots; not exactly sure which don't,
309 # and this doesn't activate hordes of code, so do it always.
310 config ISA
311         bool
312         default y
313         help
314           Find out whether you have ISA slots on your motherboard.  ISA is the
315           name of a bus system, i.e. the way the CPU talks to the other stuff
316           inside your box.  Other bus systems are PCI, EISA, MicroChannel
317           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
318           newer boards don't support it.  If you have ISA, say Y, otherwise N.
319 
320 config ISA_DMA_API
321         bool
322         default y
323 
324 config PCI
325         bool
326         depends on !ALPHA_JENSEN
327         select GENERIC_PCI_IOMAP
328         default y
329         help
330           Find out whether you have a PCI motherboard. PCI is the name of a
331           bus system, i.e. the way the CPU talks to the other stuff inside
332           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
333           VESA. If you have PCI, say Y, otherwise N.
334 
335 config PCI_DOMAINS
336         bool
337         default y
338 
339 config PCI_SYSCALL
340         def_bool PCI
341 
342 config IOMMU_HELPER
343         def_bool PCI
344 
345 config ALPHA_NONAME
346         bool
347         depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
348         default y
349         help
350           The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
351           UDB).  This design was produced by Digital's Technical OEM (TOEM)
352           group. It uses the 21066 processor running at 166MHz or 233MHz. It
353           is a baby-AT size, and runs from a standard PC power supply. It has
354           5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
355           2 versions, with either PS/2 or large DIN connectors for the
356           keyboard.
357 
358 config ALPHA_EV4
359         bool
360         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
361         default y if !ALPHA_LYNX
362 
363 config ALPHA_LCA
364         bool
365         depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
366         default y
367 
368 config ALPHA_APECS
369         bool
370         depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
371         default y
372 
373 config ALPHA_EB64P
374         bool
375         depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
376         default y
377         help
378           Uses 21064 or 21064A and APECs.  Has ISA and PCI expansion (3 ISA,
379           2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
380           ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
381           (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
382           SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM.  PC-AT size.
383           Runs from standard PC power supply.
384 
385 config ALPHA_EV5
386         bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
387         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
388 
389 config ALPHA_EV4
390         bool
391         default y if ALPHA_LYNX && !ALPHA_EV5
392 
393 config ALPHA_CIA
394         bool
395         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
396         default y
397 
398 config ALPHA_EV56
399         bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
400         default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
401 
402 config ALPHA_EV56
403         prompt "EV56 CPU (speed >= 333MHz)?"
404         depends on ALPHA_NORITAKE || ALPHA_PRIMO
405 
406 config ALPHA_EV56
407         prompt "EV56 CPU (speed >= 400MHz)?"
408         depends on ALPHA_RAWHIDE
409 
410 config ALPHA_PRIMO
411         bool "EV5 CPU daughtercard (model 5/xxx)?"
412         depends on ALPHA_NORITAKE || ALPHA_MIKASA
413         help
414           Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
415 
416 config ALPHA_GAMMA
417         bool "EV5 CPU(s) (model 5/xxx)?"
418         depends on ALPHA_SABLE
419         help
420           Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
421 
422 config ALPHA_GAMMA
423         bool
424         depends on ALPHA_LYNX
425         default y
426 
427 config ALPHA_T2
428         bool
429         depends on ALPHA_SABLE || ALPHA_LYNX
430         default y
431 
432 config ALPHA_PYXIS
433         bool
434         depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
435         default y
436 
437 config ALPHA_EV6
438         bool
439         depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
440         default y
441 
442 config ALPHA_TSUNAMI
443         bool
444         depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
445         default y
446 
447 config ALPHA_EV67
448         bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
449         default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
450         help
451           Is this a machine based on the EV67 core?  If in doubt, select N here
452           and the machine will be treated as an EV6.
453 
454 config ALPHA_MCPCIA
455         bool
456         depends on ALPHA_RAWHIDE
457         default y
458 
459 config ALPHA_POLARIS
460         bool
461         depends on ALPHA_RX164
462         default y
463 
464 config ALPHA_IRONGATE
465         bool
466         depends on ALPHA_NAUTILUS
467         default y
468 
469 config GENERIC_HWEIGHT
470         bool
471         default y if !ALPHA_EV67
472 
473 config ALPHA_AVANTI
474         bool
475         depends on ALPHA_XL || ALPHA_AVANTI_CH
476         default y
477         help
478           Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
479           Alphas. Info at
480           <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
481 
482 config ALPHA_BROKEN_IRQ_MASK
483         bool
484         depends on ALPHA_GENERIC || ALPHA_PC164
485         default y
486 
487 config VGA_HOSE
488         bool
489         depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
490         default y
491         help
492           Support VGA on an arbitrary hose; needed for several platforms
493           which always have multiple hoses, and whose consoles support it.
494 
495 
496 config ALPHA_QEMU
497         bool "Run under QEMU emulation"
498         depends on !ALPHA_GENERIC
499         ---help---
500           Assume the presence of special features supported by QEMU PALcode
501           that reduce the overhead of system emulation.
502 
503           Generic kernels will auto-detect QEMU.  But when building a
504           system-specific kernel, the assumption is that we want to
505           elimiate as many runtime tests as possible.
506 
507           If unsure, say N.
508 
509 
510 config ALPHA_SRM
511         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
512         depends on TTY
513         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
514         ---help---
515           There are two different types of booting firmware on Alphas: SRM,
516           which is command line driven, and ARC, which uses menus and arrow
517           keys. Details about the Linux/Alpha booting process are contained in
518           the Linux/Alpha FAQ, accessible on the WWW from
519           <http://www.alphalinux.org/>.
520 
521           The usual way to load Linux on an Alpha machine is to use MILO
522           (a bootloader that lets you pass command line parameters to the
523           kernel just like lilo does for the x86 architecture) which can be
524           loaded either from ARC or can be installed directly as a permanent
525           firmware replacement from floppy (which requires changing a certain
526           jumper on the motherboard). If you want to do either of these, say N
527           here. If MILO doesn't work on your system (true for Jensen
528           motherboards), you can bypass it altogether and boot Linux directly
529           from an SRM console; say Y here in order to do that. Note that you
530           won't be able to boot from an IDE disk using SRM.
531 
532           If unsure, say N.
533 
534 config EISA
535         bool
536         depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
537         default y
538 
539 config ARCH_MAY_HAVE_PC_FDC
540         def_bool y
541 
542 config SMP
543         bool "Symmetric multi-processing support"
544         depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
545         ---help---
546           This enables support for systems with more than one CPU. If you have
547           a system with only one CPU, say N. If you have a system with more
548           than one CPU, say Y.
549 
550           If you say N here, the kernel will run on uni- and multiprocessor
551           machines, but will use only one CPU of a multiprocessor machine. If
552           you say Y here, the kernel will run on many, but not all,
553           uniprocessor machines. On a uniprocessor machine, the kernel
554           will run faster if you say N here.
555 
556           See also the SMP-HOWTO available at
557           <http://www.tldp.org/docs.html#howto>.
558 
559           If you don't know what to do here, say N.
560 
561 config HAVE_DEC_LOCK
562         bool
563         depends on SMP
564         default y
565 
566 config NR_CPUS
567         int "Maximum number of CPUs (2-32)"
568         range 2 32
569         depends on SMP
570         default "32" if ALPHA_GENERIC || ALPHA_MARVEL
571         default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
572         help
573           MARVEL support can handle a maximum of 32 CPUs, all the others
574           with working support have a maximum of 4 CPUs.
575 
576 config ARCH_DISCONTIGMEM_ENABLE
577         bool "Discontiguous Memory Support"
578         help
579           Say Y to support efficient handling of discontiguous physical memory,
580           for architectures which are either NUMA (Non-Uniform Memory Access)
581           or have huge holes in the physical address space for other reasons.
582           See <file:Documentation/vm/numa> for more.
583 
584 source "mm/Kconfig"
585 
586 config NUMA
587         bool "NUMA Support (EXPERIMENTAL)"
588         depends on DISCONTIGMEM && BROKEN
589         help
590           Say Y to compile the kernel to support NUMA (Non-Uniform Memory
591           Access).  This option is for configuring high-end multiprocessor
592           server machines.  If in doubt, say N.
593 
594 config ALPHA_WTINT
595         bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
596         default y if ALPHA_QEMU
597         default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
598         default n if !ALPHA_SRM && !ALPHA_GENERIC
599         default y if SMP
600         ---help---
601           The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
602           to sleep until the next interrupt.  This may reduce the power
603           consumed, and the heat produced by the computer.  However, it has
604           the side effect of making the cycle counter unreliable as a timing
605           device across the sleep.
606 
607           For emulation under QEMU, definitely say Y here, as we have other
608           mechanisms for measuring time than the cycle counter.
609 
610           For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
611           MILO, sleep mode is not supported so you might as well say N here.
612 
613           For SMP systems we cannot use the cycle counter for timing anyway,
614           so you might as well say Y here.
615 
616           If unsure, say N.
617 
618 config NODES_SHIFT
619         int
620         default "7"
621         depends on NEED_MULTIPLE_NODES
622 
623 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
624 config ALPHA_LARGE_VMALLOC
625         bool
626         ---help---
627           Process creation and other aspects of virtual memory management can
628           be streamlined if we restrict the kernel to one PGD for all vmalloc
629           allocations.  This equates to about 8GB.
630 
631           Under normal circumstances, this is so far and above what is needed
632           as to be laughable.  However, there are certain applications (such
633           as benchmark-grade in-kernel web serving) that can make use of as
634           much vmalloc space as is available.
635 
636           Say N unless you know you need gobs and gobs of vmalloc space.
637 
638 config VERBOSE_MCHECK
639         bool "Verbose Machine Checks"
640 
641 config VERBOSE_MCHECK_ON
642         int "Verbose Printing Mode (0=off, 1=on, 2=all)"
643         depends on VERBOSE_MCHECK
644         default 1
645         ---help---
646           This option allows the default printing mode to be set, and then
647           possibly overridden by a boot command argument.
648 
649           For example, if one wanted the option of printing verbose
650           machine checks, but wanted the default to be as if verbose
651           machine check printing was turned off, then one would choose
652           the printing mode to be 0. Then, upon reboot, one could add
653           the boot command line "verbose_mcheck=1" to get the normal
654           verbose machine check printing, or "verbose_mcheck=2" to get
655           the maximum information available.
656 
657           Take the default (1) unless you want more control or more info.
658 
659 choice
660         prompt "Timer interrupt frequency (HZ)?"
661         default HZ_128 if ALPHA_QEMU
662         default HZ_1200 if ALPHA_RAWHIDE
663         default HZ_1024
664         ---help---
665           The frequency at which timer interrupts occur.  A high frequency
666           minimizes latency, whereas a low frequency minimizes overhead of
667           process accounting.  The later effect is especially significant
668           when being run under QEMU.
669 
670           Note that some Alpha hardware cannot change the interrupt frequency
671           of the timer.  If unsure, say 1024 (or 1200 for Rawhide).
672 
673         config HZ_32
674                 bool "32 Hz"
675         config HZ_64
676                 bool "64 Hz"
677         config HZ_128
678                 bool "128 Hz"
679         config HZ_256
680                 bool "256 Hz"
681         config HZ_1024
682                 bool "1024 Hz"
683         config HZ_1200
684                 bool "1200 Hz"
685 endchoice
686 
687 config HZ
688         int 
689         default 32 if HZ_32
690         default 64 if HZ_64
691         default 128 if HZ_128
692         default 256 if HZ_256
693         default 1200 if HZ_1200
694         default 1024
695 
696 source "drivers/pci/Kconfig"
697 source "drivers/eisa/Kconfig"
698 
699 source "drivers/pcmcia/Kconfig"
700 
701 config SRM_ENV
702         tristate "SRM environment through procfs"
703         depends on PROC_FS
704         ---help---
705           If you enable this option, a subdirectory inside /proc called
706           /proc/srm_environment will give you access to the all important
707           SRM environment variables (those which have a name) and also
708           to all others (by their internal number).
709 
710           SRM is something like a BIOS for Alpha machines. There are some
711           other such BIOSes, like AlphaBIOS, which this driver cannot
712           support (hey, that's not SRM!).
713 
714           Despite the fact that this driver doesn't work on all Alphas (but
715           only on those which have SRM as their firmware), it's save to
716           build it even if your particular machine doesn't know about SRM
717           (or if you intend to compile a generic kernel). It will simply
718           not create those subdirectory in /proc (and give you some warning,
719           of course).
720 
721           This driver is also available as a module and will be called
722           srm_env then.
723 
724 source "fs/Kconfig.binfmt"
725 
726 endmenu
727 
728 source "net/Kconfig"
729 
730 source "drivers/Kconfig"
731 
732 source "fs/Kconfig"
733 
734 source "arch/alpha/Kconfig.debug"
735 
736 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
737 # but we also need it if VGA_HOSE is set
738 config DUMMY_CONSOLE
739         bool
740         depends on VGA_HOSE
741         default y
742 
743 source "security/Kconfig"
744 
745 source "crypto/Kconfig"
746 
747 source "lib/Kconfig"
748 

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