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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 ARCH_USE_CMPXCHG_LOCKREF
  7         select HAVE_AOUT
  8         select HAVE_IDE
  9         select HAVE_OPROFILE
 10         select HAVE_PCSPKR_PLATFORM
 11         select HAVE_PERF_EVENTS
 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_IPC_PARSE_VERSION
 17         select ARCH_HAVE_NMI_SAFE_CMPXCHG
 18         select AUDIT_ARCH
 19         select GENERIC_CLOCKEVENTS
 20         select GENERIC_SMP_IDLE_THREAD
 21         select GENERIC_STRNCPY_FROM_USER
 22         select GENERIC_STRNLEN_USER
 23         select HAVE_ARCH_AUDITSYSCALL
 24         select HAVE_MOD_ARCH_SPECIFIC
 25         select MODULES_USE_ELF_RELA
 26         select ODD_RT_SIGACTION
 27         select OLD_SIGSUSPEND
 28         select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
 29         help
 30           The Alpha is a 64-bit general-purpose processor designed and
 31           marketed by the Digital Equipment Corporation of blessed memory,
 32           now Hewlett-Packard.  The Alpha Linux project has a home page at
 33           <http://www.alphalinux.org/>.
 34 
 35 config 64BIT
 36         def_bool y
 37 
 38 config MMU
 39         bool
 40         default y
 41 
 42 config RWSEM_GENERIC_SPINLOCK
 43         bool
 44 
 45 config RWSEM_XCHGADD_ALGORITHM
 46         bool
 47         default y
 48 
 49 config ARCH_HAS_ILOG2_U32
 50         bool
 51         default n
 52 
 53 config ARCH_HAS_ILOG2_U64
 54         bool
 55         default n
 56 
 57 config GENERIC_CALIBRATE_DELAY
 58         bool
 59         default y
 60 
 61 config ZONE_DMA
 62         bool
 63         default y
 64 
 65 config ARCH_DMA_ADDR_T_64BIT
 66         def_bool y
 67 
 68 config NEED_DMA_MAP_STATE
 69        def_bool y
 70 
 71 config NEED_SG_DMA_LENGTH
 72         def_bool y
 73 
 74 config GENERIC_ISA_DMA
 75         bool
 76         default y
 77 
 78 config PGTABLE_LEVELS
 79         int
 80         default 3
 81 
 82 source "init/Kconfig"
 83 source "kernel/Kconfig.freezer"
 84 
 85 config AUDIT_ARCH
 86         bool
 87 
 88 menu "System setup"
 89 
 90 choice
 91         prompt "Alpha system type"
 92         default ALPHA_GENERIC
 93         ---help---
 94           This is the system type of your hardware.  A "generic" kernel will
 95           run on any supported Alpha system. However, if you configure a
 96           kernel for your specific system, it will be faster and smaller.
 97 
 98           To find out what type of Alpha system you have, you may want to
 99           check out the Linux/Alpha FAQ, accessible on the WWW from
100           <http://www.alphalinux.org/>. In summary:
101 
102           Alcor/Alpha-XLT     AS 600, AS 500, XL-300, XL-366
103           Alpha-XL            XL-233, XL-266
104           AlphaBook1          Alpha laptop
105           Avanti              AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
106           Cabriolet           AlphaPC64, AlphaPCI64
107           DP264               DP264 / DS20 / ES40 / DS10 / DS10L
108           EB164               EB164 21164 evaluation board
109           EB64+               EB64+ 21064 evaluation board
110           EB66                EB66 21066 evaluation board
111           EB66+               EB66+ 21066 evaluation board
112           Jensen              DECpc 150, DEC 2000 models 300, 500
113           LX164               AlphaPC164-LX
114           Lynx                AS 2100A
115           Miata               Personal Workstation 433/500/600 a/au
116           Marvel              AlphaServer ES47 / ES80 / GS1280
117           Mikasa              AS 1000
118           Noname              AXPpci33, UDB (Multia)
119           Noritake            AS 1000A, AS 600A, AS 800
120           PC164               AlphaPC164
121           Rawhide             AS 1200, AS 4000, AS 4100
122           Ruffian             RPX164-2, AlphaPC164-UX, AlphaPC164-BX
123           SX164               AlphaPC164-SX
124           Sable               AS 2000, AS 2100
125           Shark               DS 20L
126           Takara              Takara (OEM)
127           Titan               AlphaServer ES45 / DS25 / DS15
128           Wildfire            AlphaServer GS 40/80/160/320
129 
130           If you don't know what to do, choose "generic".
131 
132 config ALPHA_GENERIC
133         bool "Generic"
134         depends on TTY
135         help
136           A generic kernel will run on all supported Alpha hardware.
137 
138 config ALPHA_ALCOR
139         bool "Alcor/Alpha-XLT"
140         help
141           For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
142           slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
143           Address, CIA) - a 383 pin plastic PGA).  It provides a DRAM
144           controller (256-bit memory bus) and a PCI interface.  It also does
145           all the work required to support an external Bcache and to maintain
146           memory coherence when a PCI device DMAs into (or out of) memory.
147 
148 config ALPHA_XL
149         bool "Alpha-XL"
150         help
151           XL-233 and XL-266-based Alpha systems.
152 
153 config ALPHA_BOOK1
154         bool "AlphaBook1"
155         help
156           Dec AlphaBook1/Burns Alpha-based laptops.
157 
158 config ALPHA_AVANTI_CH
159         bool "Avanti"
160 
161 config ALPHA_CABRIOLET
162         bool "Cabriolet"
163         help
164           Cabriolet AlphaPC64, AlphaPCI64 systems.  Derived from EB64+ but now
165           baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
166           slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
167           Bcache SIMMs.  Requires power supply with 3.3V output.
168 
169 config ALPHA_DP264
170         bool "DP264"
171         help
172           Various 21264 systems with the tsunami core logic chipset.
173           API Networks: 264DP, UP2000(+), CS20;
174           Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
175 
176 config ALPHA_EB164
177         bool "EB164"
178         help
179           EB164 21164 evaluation board from DEC.  Uses 21164 and ALCOR.  Has
180           ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
181           shared with an ISA slot) and 2 32-bit PCI slots.  Uses plus-in
182           Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
183           MOUSE (PS2 style), RTC/NVRAM.  Boot ROM is Flash.  PC-AT-sized
184           motherboard.  Requires power supply with 3.3V output.
185 
186 config ALPHA_EB64P_CH
187         bool "EB64+"
188 
189 config ALPHA_EB66
190         bool "EB66"
191         help
192           A Digital DS group board.  Uses 21066 or 21066A.  I/O sub-system is
193           identical to EB64+.  Baby PC-AT size.  Runs from standard PC power
194           supply.  The EB66 schematic was published as a marketing poster
195           advertising the 21066 as "the first microprocessor in the world with
196           embedded PCI".
197 
198 config ALPHA_EB66P
199         bool "EB66+"
200         help
201           Later variant of the EB66 board.
202 
203 config ALPHA_EIGER
204         bool "Eiger"
205         help
206           Apparently an obscure OEM single-board computer based on the
207           Typhoon/Tsunami chipset family. Information on it is scanty.
208 
209 config ALPHA_JENSEN
210         bool "Jensen"
211         help
212           DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
213           of the first-generation Alpha systems. A number of these systems
214           seem to be available on the second- hand market. The Jensen is a
215           floor-standing tower system which originally used a 150MHz 21064 It
216           used programmable logic to interface a 486 EISA I/O bridge to the
217           CPU.
218 
219 config ALPHA_LX164
220         bool "LX164"
221         help
222           A technical overview of this board is available at
223           <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
224 
225 config ALPHA_LYNX
226         bool "Lynx"
227         help
228           AlphaServer 2100A-based systems.
229 
230 config ALPHA_MARVEL
231         bool "Marvel"
232         help
233           AlphaServer ES47 / ES80 / GS1280 based on EV7.
234 
235 config ALPHA_MIATA
236         bool "Miata"
237         help
238           The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
239           or 600au).
240 
241 config ALPHA_MIKASA
242         bool "Mikasa"
243         help
244           AlphaServer 1000-based Alpha systems.
245 
246 config ALPHA_NAUTILUS
247         bool "Nautilus"
248         help
249           Alpha systems based on the AMD 751 & ALI 1543C chipsets.
250 
251 config ALPHA_NONAME_CH
252         bool "Noname"
253 
254 config ALPHA_NORITAKE
255         bool "Noritake"
256         help
257           AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
258           systems.
259 
260 config ALPHA_PC164
261         bool "PC164"
262 
263 config ALPHA_P2K
264         bool "Platform2000"
265 
266 config ALPHA_RAWHIDE
267         bool "Rawhide"
268         help
269           AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
270           See HOWTO at
271           <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
272 
273 config ALPHA_RUFFIAN
274         bool "Ruffian"
275         help
276           Samsung APC164UX.  There is a page on known problems and workarounds
277           at <http://www.alphalinux.org/faq/FAQ-11.html>.
278 
279 config ALPHA_RX164
280         bool "RX164"
281 
282 config ALPHA_SX164
283         bool "SX164"
284 
285 config ALPHA_SABLE
286         bool "Sable"
287         help
288           Digital AlphaServer 2000 and 2100-based systems.
289 
290 config ALPHA_SHARK
291         bool "Shark"
292 
293 config ALPHA_TAKARA
294         bool "Takara"
295         help
296           Alpha 11164-based OEM single-board computer.
297 
298 config ALPHA_TITAN
299         bool "Titan"
300         help
301           AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
302 
303 config ALPHA_WILDFIRE
304         bool "Wildfire"
305         help
306           AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
307 
308 endchoice
309 
310 # clear all implied options (don't want default values for those):
311 # Most of these machines have ISA slots; not exactly sure which don't,
312 # and this doesn't activate hordes of code, so do it always.
313 config ISA
314         bool
315         default y
316         help
317           Find out whether you have ISA slots on your motherboard.  ISA is the
318           name of a bus system, i.e. the way the CPU talks to the other stuff
319           inside your box.  Other bus systems are PCI, EISA, MicroChannel
320           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
321           newer boards don't support it.  If you have ISA, say Y, otherwise N.
322 
323 config ISA_DMA_API
324         bool
325         default y
326 
327 config PCI
328         bool
329         depends on !ALPHA_JENSEN
330         select GENERIC_PCI_IOMAP
331         default y
332         help
333           Find out whether you have a PCI motherboard. PCI is the name of a
334           bus system, i.e. the way the CPU talks to the other stuff inside
335           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
336           VESA. If you have PCI, say Y, otherwise N.
337 
338 config PCI_DOMAINS
339         bool
340         default y
341 
342 config PCI_SYSCALL
343         def_bool PCI
344 
345 config IOMMU_HELPER
346         def_bool PCI
347 
348 config ALPHA_NONAME
349         bool
350         depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
351         default y
352         help
353           The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
354           UDB).  This design was produced by Digital's Technical OEM (TOEM)
355           group. It uses the 21066 processor running at 166MHz or 233MHz. It
356           is a baby-AT size, and runs from a standard PC power supply. It has
357           5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
358           2 versions, with either PS/2 or large DIN connectors for the
359           keyboard.
360 
361 config ALPHA_EV4
362         bool
363         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
364         default y if !ALPHA_LYNX
365 
366 config ALPHA_LCA
367         bool
368         depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
369         default y
370 
371 config ALPHA_APECS
372         bool
373         depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
374         default y
375 
376 config ALPHA_EB64P
377         bool
378         depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
379         default y
380         help
381           Uses 21064 or 21064A and APECs.  Has ISA and PCI expansion (3 ISA,
382           2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
383           ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
384           (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
385           SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM.  PC-AT size.
386           Runs from standard PC power supply.
387 
388 config ALPHA_EV5
389         bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
390         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
391 
392 config ALPHA_EV4
393         bool
394         default y if ALPHA_LYNX && !ALPHA_EV5
395 
396 config ALPHA_CIA
397         bool
398         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
399         default y
400 
401 config ALPHA_EV56
402         bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
403         default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
404 
405 config ALPHA_EV56
406         prompt "EV56 CPU (speed >= 333MHz)?"
407         depends on ALPHA_NORITAKE || ALPHA_PRIMO
408 
409 config ALPHA_EV56
410         prompt "EV56 CPU (speed >= 400MHz)?"
411         depends on ALPHA_RAWHIDE
412 
413 config ALPHA_PRIMO
414         bool "EV5 CPU daughtercard (model 5/xxx)?"
415         depends on ALPHA_NORITAKE || ALPHA_MIKASA
416         help
417           Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
418 
419 config ALPHA_GAMMA
420         bool "EV5 CPU(s) (model 5/xxx)?"
421         depends on ALPHA_SABLE
422         help
423           Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
424 
425 config ALPHA_GAMMA
426         bool
427         depends on ALPHA_LYNX
428         default y
429 
430 config ALPHA_T2
431         bool
432         depends on ALPHA_SABLE || ALPHA_LYNX
433         default y
434 
435 config ALPHA_PYXIS
436         bool
437         depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
438         default y
439 
440 config ALPHA_EV6
441         bool
442         depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
443         default y
444 
445 config ALPHA_TSUNAMI
446         bool
447         depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
448         default y
449 
450 config ALPHA_EV67
451         bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
452         default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
453         help
454           Is this a machine based on the EV67 core?  If in doubt, select N here
455           and the machine will be treated as an EV6.
456 
457 config ALPHA_MCPCIA
458         bool
459         depends on ALPHA_RAWHIDE
460         default y
461 
462 config ALPHA_POLARIS
463         bool
464         depends on ALPHA_RX164
465         default y
466 
467 config ALPHA_IRONGATE
468         bool
469         depends on ALPHA_NAUTILUS
470         default y
471 
472 config GENERIC_HWEIGHT
473         bool
474         default y if !ALPHA_EV67
475 
476 config ALPHA_AVANTI
477         bool
478         depends on ALPHA_XL || ALPHA_AVANTI_CH
479         default y
480         help
481           Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
482           Alphas. Info at
483           <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
484 
485 config ALPHA_BROKEN_IRQ_MASK
486         bool
487         depends on ALPHA_GENERIC || ALPHA_PC164
488         default y
489 
490 config VGA_HOSE
491         bool
492         depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
493         default y
494         help
495           Support VGA on an arbitrary hose; needed for several platforms
496           which always have multiple hoses, and whose consoles support it.
497 
498 
499 config ALPHA_QEMU
500         bool "Run under QEMU emulation"
501         depends on !ALPHA_GENERIC
502         ---help---
503           Assume the presence of special features supported by QEMU PALcode
504           that reduce the overhead of system emulation.
505 
506           Generic kernels will auto-detect QEMU.  But when building a
507           system-specific kernel, the assumption is that we want to
508           elimiate as many runtime tests as possible.
509 
510           If unsure, say N.
511 
512 
513 config ALPHA_SRM
514         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
515         depends on TTY
516         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
517         ---help---
518           There are two different types of booting firmware on Alphas: SRM,
519           which is command line driven, and ARC, which uses menus and arrow
520           keys. Details about the Linux/Alpha booting process are contained in
521           the Linux/Alpha FAQ, accessible on the WWW from
522           <http://www.alphalinux.org/>.
523 
524           The usual way to load Linux on an Alpha machine is to use MILO
525           (a bootloader that lets you pass command line parameters to the
526           kernel just like lilo does for the x86 architecture) which can be
527           loaded either from ARC or can be installed directly as a permanent
528           firmware replacement from floppy (which requires changing a certain
529           jumper on the motherboard). If you want to do either of these, say N
530           here. If MILO doesn't work on your system (true for Jensen
531           motherboards), you can bypass it altogether and boot Linux directly
532           from an SRM console; say Y here in order to do that. Note that you
533           won't be able to boot from an IDE disk using SRM.
534 
535           If unsure, say N.
536 
537 config EISA
538         bool
539         depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
540         default y
541 
542 config ARCH_MAY_HAVE_PC_FDC
543         def_bool y
544 
545 config SMP
546         bool "Symmetric multi-processing support"
547         depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
548         ---help---
549           This enables support for systems with more than one CPU. If you have
550           a system with only one CPU, say N. If you have a system with more
551           than one CPU, say Y.
552 
553           If you say N here, the kernel will run on uni- and multiprocessor
554           machines, but will use only one CPU of a multiprocessor machine. If
555           you say Y here, the kernel will run on many, but not all,
556           uniprocessor machines. On a uniprocessor machine, the kernel
557           will run faster if you say N here.
558 
559           See also the SMP-HOWTO available at
560           <http://www.tldp.org/docs.html#howto>.
561 
562           If you don't know what to do here, say N.
563 
564 config HAVE_DEC_LOCK
565         bool
566         depends on SMP
567         default y
568 
569 config NR_CPUS
570         int "Maximum number of CPUs (2-32)"
571         range 2 32
572         depends on SMP
573         default "32" if ALPHA_GENERIC || ALPHA_MARVEL
574         default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
575         help
576           MARVEL support can handle a maximum of 32 CPUs, all the others
577           with working support have a maximum of 4 CPUs.
578 
579 config ARCH_DISCONTIGMEM_ENABLE
580         bool "Discontiguous Memory Support"
581         help
582           Say Y to support efficient handling of discontiguous physical memory,
583           for architectures which are either NUMA (Non-Uniform Memory Access)
584           or have huge holes in the physical address space for other reasons.
585           See <file:Documentation/vm/numa> for more.
586 
587 source "mm/Kconfig"
588 
589 config NUMA
590         bool "NUMA Support (EXPERIMENTAL)"
591         depends on DISCONTIGMEM && BROKEN
592         help
593           Say Y to compile the kernel to support NUMA (Non-Uniform Memory
594           Access).  This option is for configuring high-end multiprocessor
595           server machines.  If in doubt, say N.
596 
597 config ALPHA_WTINT
598         bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
599         default y if ALPHA_QEMU
600         default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
601         default n if !ALPHA_SRM && !ALPHA_GENERIC
602         default y if SMP
603         ---help---
604           The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
605           to sleep until the next interrupt.  This may reduce the power
606           consumed, and the heat produced by the computer.  However, it has
607           the side effect of making the cycle counter unreliable as a timing
608           device across the sleep.
609 
610           For emulation under QEMU, definitely say Y here, as we have other
611           mechanisms for measuring time than the cycle counter.
612 
613           For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
614           MILO, sleep mode is not supported so you might as well say N here.
615 
616           For SMP systems we cannot use the cycle counter for timing anyway,
617           so you might as well say Y here.
618 
619           If unsure, say N.
620 
621 config NODES_SHIFT
622         int
623         default "7"
624         depends on NEED_MULTIPLE_NODES
625 
626 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
627 config ALPHA_LARGE_VMALLOC
628         bool
629         ---help---
630           Process creation and other aspects of virtual memory management can
631           be streamlined if we restrict the kernel to one PGD for all vmalloc
632           allocations.  This equates to about 8GB.
633 
634           Under normal circumstances, this is so far and above what is needed
635           as to be laughable.  However, there are certain applications (such
636           as benchmark-grade in-kernel web serving) that can make use of as
637           much vmalloc space as is available.
638 
639           Say N unless you know you need gobs and gobs of vmalloc space.
640 
641 config VERBOSE_MCHECK
642         bool "Verbose Machine Checks"
643 
644 config VERBOSE_MCHECK_ON
645         int "Verbose Printing Mode (0=off, 1=on, 2=all)"
646         depends on VERBOSE_MCHECK
647         default 1
648         ---help---
649           This option allows the default printing mode to be set, and then
650           possibly overridden by a boot command argument.
651 
652           For example, if one wanted the option of printing verbose
653           machine checks, but wanted the default to be as if verbose
654           machine check printing was turned off, then one would choose
655           the printing mode to be 0. Then, upon reboot, one could add
656           the boot command line "verbose_mcheck=1" to get the normal
657           verbose machine check printing, or "verbose_mcheck=2" to get
658           the maximum information available.
659 
660           Take the default (1) unless you want more control or more info.
661 
662 choice
663         prompt "Timer interrupt frequency (HZ)?"
664         default HZ_128 if ALPHA_QEMU
665         default HZ_1200 if ALPHA_RAWHIDE
666         default HZ_1024
667         ---help---
668           The frequency at which timer interrupts occur.  A high frequency
669           minimizes latency, whereas a low frequency minimizes overhead of
670           process accounting.  The later effect is especially significant
671           when being run under QEMU.
672 
673           Note that some Alpha hardware cannot change the interrupt frequency
674           of the timer.  If unsure, say 1024 (or 1200 for Rawhide).
675 
676         config HZ_32
677                 bool "32 Hz"
678         config HZ_64
679                 bool "64 Hz"
680         config HZ_128
681                 bool "128 Hz"
682         config HZ_256
683                 bool "256 Hz"
684         config HZ_1024
685                 bool "1024 Hz"
686         config HZ_1200
687                 bool "1200 Hz"
688 endchoice
689 
690 config HZ
691         int 
692         default 32 if HZ_32
693         default 64 if HZ_64
694         default 128 if HZ_128
695         default 256 if HZ_256
696         default 1200 if HZ_1200
697         default 1024
698 
699 source "drivers/pci/Kconfig"
700 source "drivers/eisa/Kconfig"
701 
702 source "drivers/pcmcia/Kconfig"
703 
704 config SRM_ENV
705         tristate "SRM environment through procfs"
706         depends on PROC_FS
707         ---help---
708           If you enable this option, a subdirectory inside /proc called
709           /proc/srm_environment will give you access to the all important
710           SRM environment variables (those which have a name) and also
711           to all others (by their internal number).
712 
713           SRM is something like a BIOS for Alpha machines. There are some
714           other such BIOSes, like AlphaBIOS, which this driver cannot
715           support (hey, that's not SRM!).
716 
717           Despite the fact that this driver doesn't work on all Alphas (but
718           only on those which have SRM as their firmware), it's save to
719           build it even if your particular machine doesn't know about SRM
720           (or if you intend to compile a generic kernel). It will simply
721           not create those subdirectory in /proc (and give you some warning,
722           of course).
723 
724           This driver is also available as a module and will be called
725           srm_env then.
726 
727 source "fs/Kconfig.binfmt"
728 
729 endmenu
730 
731 source "net/Kconfig"
732 
733 source "drivers/Kconfig"
734 
735 source "fs/Kconfig"
736 
737 source "arch/alpha/Kconfig.debug"
738 
739 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
740 # but we also need it if VGA_HOSE is set
741 config DUMMY_CONSOLE
742         bool
743         depends on VGA_HOSE
744         default y
745 
746 source "security/Kconfig"
747 
748 source "crypto/Kconfig"
749 
750 source "lib/Kconfig"
751 

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