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

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