xref: /openbmc/linux/arch/alpha/Kconfig (revision a2cce7a9) 
1config 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 HAVE_DMA_ATTRS
13	select VIRT_TO_BUS
14	select GENERIC_IRQ_PROBE
15	select AUTO_IRQ_AFFINITY if SMP
16	select GENERIC_IRQ_SHOW
17	select ARCH_WANT_OPTIONAL_GPIOLIB
18	select ARCH_WANT_IPC_PARSE_VERSION
19	select ARCH_HAVE_NMI_SAFE_CMPXCHG
20	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
21	select AUDIT_ARCH
22	select GENERIC_CLOCKEVENTS
23	select GENERIC_SMP_IDLE_THREAD
24	select GENERIC_STRNCPY_FROM_USER
25	select GENERIC_STRNLEN_USER
26	select HAVE_ARCH_AUDITSYSCALL
27	select HAVE_MOD_ARCH_SPECIFIC
28	select MODULES_USE_ELF_RELA
29	select ODD_RT_SIGACTION
30	select OLD_SIGSUSPEND
31	help
32	  The Alpha is a 64-bit general-purpose processor designed and
33	  marketed by the Digital Equipment Corporation of blessed memory,
34	  now Hewlett-Packard.  The Alpha Linux project has a home page at
35	  <http://www.alphalinux.org/>.
36
37config 64BIT
38	def_bool y
39
40config MMU
41	bool
42	default y
43
44config RWSEM_GENERIC_SPINLOCK
45	bool
46
47config RWSEM_XCHGADD_ALGORITHM
48	bool
49	default y
50
51config ARCH_HAS_ILOG2_U32
52	bool
53	default n
54
55config ARCH_HAS_ILOG2_U64
56	bool
57	default n
58
59config GENERIC_CALIBRATE_DELAY
60	bool
61	default y
62
63config ZONE_DMA
64	bool
65	default y
66
67config ARCH_DMA_ADDR_T_64BIT
68	def_bool y
69
70config NEED_DMA_MAP_STATE
71       def_bool y
72
73config NEED_SG_DMA_LENGTH
74	def_bool y
75
76config GENERIC_ISA_DMA
77	bool
78	default y
79
80config PGTABLE_LEVELS
81	int
82	default 3
83
84source "init/Kconfig"
85source "kernel/Kconfig.freezer"
86
87config AUDIT_ARCH
88	bool
89
90menu "System setup"
91
92choice
93	prompt "Alpha system type"
94	default ALPHA_GENERIC
95	---help---
96	  This is the system type of your hardware.  A "generic" kernel will
97	  run on any supported Alpha system. However, if you configure a
98	  kernel for your specific system, it will be faster and smaller.
99
100	  To find out what type of Alpha system you have, you may want to
101	  check out the Linux/Alpha FAQ, accessible on the WWW from
102	  <http://www.alphalinux.org/>. In summary:
103
104	  Alcor/Alpha-XLT     AS 600, AS 500, XL-300, XL-366
105	  Alpha-XL            XL-233, XL-266
106	  AlphaBook1          Alpha laptop
107	  Avanti              AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
108	  Cabriolet           AlphaPC64, AlphaPCI64
109	  DP264               DP264 / DS20 / ES40 / DS10 / DS10L
110	  EB164               EB164 21164 evaluation board
111	  EB64+               EB64+ 21064 evaluation board
112	  EB66                EB66 21066 evaluation board
113	  EB66+               EB66+ 21066 evaluation board
114	  Jensen              DECpc 150, DEC 2000 models 300, 500
115	  LX164               AlphaPC164-LX
116	  Lynx                AS 2100A
117	  Miata               Personal Workstation 433/500/600 a/au
118	  Marvel              AlphaServer ES47 / ES80 / GS1280
119	  Mikasa              AS 1000
120	  Noname              AXPpci33, UDB (Multia)
121	  Noritake            AS 1000A, AS 600A, AS 800
122	  PC164               AlphaPC164
123	  Rawhide             AS 1200, AS 4000, AS 4100
124	  Ruffian             RPX164-2, AlphaPC164-UX, AlphaPC164-BX
125	  SX164               AlphaPC164-SX
126	  Sable               AS 2000, AS 2100
127	  Shark               DS 20L
128	  Takara              Takara (OEM)
129	  Titan               AlphaServer ES45 / DS25 / DS15
130	  Wildfire            AlphaServer GS 40/80/160/320
131
132	  If you don't know what to do, choose "generic".
133
134config ALPHA_GENERIC
135	bool "Generic"
136	depends on TTY
137	help
138	  A generic kernel will run on all supported Alpha hardware.
139
140config ALPHA_ALCOR
141	bool "Alcor/Alpha-XLT"
142	help
143	  For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
144	  slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
145	  Address, CIA) - a 383 pin plastic PGA).  It provides a DRAM
146	  controller (256-bit memory bus) and a PCI interface.  It also does
147	  all the work required to support an external Bcache and to maintain
148	  memory coherence when a PCI device DMAs into (or out of) memory.
149
150config ALPHA_XL
151	bool "Alpha-XL"
152	help
153	  XL-233 and XL-266-based Alpha systems.
154
155config ALPHA_BOOK1
156	bool "AlphaBook1"
157	help
158	  Dec AlphaBook1/Burns Alpha-based laptops.
159
160config ALPHA_AVANTI_CH
161	bool "Avanti"
162
163config ALPHA_CABRIOLET
164	bool "Cabriolet"
165	help
166	  Cabriolet AlphaPC64, AlphaPCI64 systems.  Derived from EB64+ but now
167	  baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
168	  slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
169	  Bcache SIMMs.  Requires power supply with 3.3V output.
170
171config ALPHA_DP264
172	bool "DP264"
173	help
174	  Various 21264 systems with the tsunami core logic chipset.
175	  API Networks: 264DP, UP2000(+), CS20;
176	  Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
177
178config ALPHA_EB164
179	bool "EB164"
180	help
181	  EB164 21164 evaluation board from DEC.  Uses 21164 and ALCOR.  Has
182	  ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
183	  shared with an ISA slot) and 2 32-bit PCI slots.  Uses plus-in
184	  Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
185	  MOUSE (PS2 style), RTC/NVRAM.  Boot ROM is Flash.  PC-AT-sized
186	  motherboard.  Requires power supply with 3.3V output.
187
188config ALPHA_EB64P_CH
189	bool "EB64+"
190
191config ALPHA_EB66
192	bool "EB66"
193	help
194	  A Digital DS group board.  Uses 21066 or 21066A.  I/O sub-system is
195	  identical to EB64+.  Baby PC-AT size.  Runs from standard PC power
196	  supply.  The EB66 schematic was published as a marketing poster
197	  advertising the 21066 as "the first microprocessor in the world with
198	  embedded PCI".
199
200config ALPHA_EB66P
201	bool "EB66+"
202	help
203	  Later variant of the EB66 board.
204
205config ALPHA_EIGER
206	bool "Eiger"
207	help
208	  Apparently an obscure OEM single-board computer based on the
209	  Typhoon/Tsunami chipset family. Information on it is scanty.
210
211config ALPHA_JENSEN
212	bool "Jensen"
213	help
214	  DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
215	  of the first-generation Alpha systems. A number of these systems
216	  seem to be available on the second- hand market. The Jensen is a
217	  floor-standing tower system which originally used a 150MHz 21064 It
218	  used programmable logic to interface a 486 EISA I/O bridge to the
219	  CPU.
220
221config ALPHA_LX164
222	bool "LX164"
223	help
224	  A technical overview of this board is available at
225	  <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
226
227config ALPHA_LYNX
228	bool "Lynx"
229	help
230	  AlphaServer 2100A-based systems.
231
232config ALPHA_MARVEL
233	bool "Marvel"
234	help
235	  AlphaServer ES47 / ES80 / GS1280 based on EV7.
236
237config ALPHA_MIATA
238	bool "Miata"
239	help
240	  The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
241	  or 600au).
242
243config ALPHA_MIKASA
244	bool "Mikasa"
245	help
246	  AlphaServer 1000-based Alpha systems.
247
248config ALPHA_NAUTILUS
249	bool "Nautilus"
250	help
251	  Alpha systems based on the AMD 751 & ALI 1543C chipsets.
252
253config ALPHA_NONAME_CH
254	bool "Noname"
255
256config ALPHA_NORITAKE
257	bool "Noritake"
258	help
259	  AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
260	  systems.
261
262config ALPHA_PC164
263	bool "PC164"
264
265config ALPHA_P2K
266	bool "Platform2000"
267
268config ALPHA_RAWHIDE
269	bool "Rawhide"
270	help
271	  AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
272	  See HOWTO at
273	  <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
274
275config ALPHA_RUFFIAN
276	bool "Ruffian"
277	help
278	  Samsung APC164UX.  There is a page on known problems and workarounds
279	  at <http://www.alphalinux.org/faq/FAQ-11.html>.
280
281config ALPHA_RX164
282	bool "RX164"
283
284config ALPHA_SX164
285	bool "SX164"
286
287config ALPHA_SABLE
288	bool "Sable"
289	help
290	  Digital AlphaServer 2000 and 2100-based systems.
291
292config ALPHA_SHARK
293	bool "Shark"
294
295config ALPHA_TAKARA
296	bool "Takara"
297	help
298	  Alpha 11164-based OEM single-board computer.
299
300config ALPHA_TITAN
301	bool "Titan"
302	help
303	  AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
304
305config ALPHA_WILDFIRE
306	bool "Wildfire"
307	help
308	  AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
309
310endchoice
311
312# clear all implied options (don't want default values for those):
313# Most of these machines have ISA slots; not exactly sure which don't,
314# and this doesn't activate hordes of code, so do it always.
315config ISA
316	bool
317	default y
318	help
319	  Find out whether you have ISA slots on your motherboard.  ISA is the
320	  name of a bus system, i.e. the way the CPU talks to the other stuff
321	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
322	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
323	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
324
325config ISA_DMA_API
326	bool
327	default y
328
329config PCI
330	bool
331	depends on !ALPHA_JENSEN
332	select GENERIC_PCI_IOMAP
333	default y
334	help
335	  Find out whether you have a PCI motherboard. PCI is the name of a
336	  bus system, i.e. the way the CPU talks to the other stuff inside
337	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
338	  VESA. If you have PCI, say Y, otherwise N.
339
340config PCI_DOMAINS
341	bool
342	default y
343
344config PCI_SYSCALL
345	def_bool PCI
346
347config IOMMU_HELPER
348	def_bool PCI
349
350config ALPHA_NONAME
351	bool
352	depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
353	default y
354	help
355	  The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
356	  UDB).  This design was produced by Digital's Technical OEM (TOEM)
357	  group. It uses the 21066 processor running at 166MHz or 233MHz. It
358	  is a baby-AT size, and runs from a standard PC power supply. It has
359	  5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
360	  2 versions, with either PS/2 or large DIN connectors for the
361	  keyboard.
362
363config ALPHA_EV4
364	bool
365	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
366	default y if !ALPHA_LYNX
367
368config ALPHA_LCA
369	bool
370	depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
371	default y
372
373config ALPHA_APECS
374	bool
375	depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
376	default y
377
378config ALPHA_EB64P
379	bool
380	depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
381	default y
382	help
383	  Uses 21064 or 21064A and APECs.  Has ISA and PCI expansion (3 ISA,
384	  2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
385	  ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
386	  (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
387	  SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM.  PC-AT size.
388	  Runs from standard PC power supply.
389
390config ALPHA_EV5
391	bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
392	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
393
394config ALPHA_EV4
395	bool
396	default y if ALPHA_LYNX && !ALPHA_EV5
397
398config ALPHA_CIA
399	bool
400	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
401	default y
402
403config ALPHA_EV56
404	bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
405	default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
406
407config ALPHA_EV56
408	prompt "EV56 CPU (speed >= 333MHz)?"
409	depends on ALPHA_NORITAKE || ALPHA_PRIMO
410
411config ALPHA_EV56
412	prompt "EV56 CPU (speed >= 400MHz)?"
413	depends on ALPHA_RAWHIDE
414
415config ALPHA_PRIMO
416	bool "EV5 CPU daughtercard (model 5/xxx)?"
417	depends on ALPHA_NORITAKE || ALPHA_MIKASA
418	help
419	  Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
420
421config ALPHA_GAMMA
422	bool "EV5 CPU(s) (model 5/xxx)?"
423	depends on ALPHA_SABLE
424	help
425	  Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
426
427config ALPHA_GAMMA
428	bool
429	depends on ALPHA_LYNX
430	default y
431
432config ALPHA_T2
433	bool
434	depends on ALPHA_SABLE || ALPHA_LYNX
435	default y
436
437config ALPHA_PYXIS
438	bool
439	depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
440	default y
441
442config ALPHA_EV6
443	bool
444	depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
445	default y
446
447config ALPHA_TSUNAMI
448	bool
449	depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
450	default y
451
452config ALPHA_EV67
453	bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
454	default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
455	help
456	  Is this a machine based on the EV67 core?  If in doubt, select N here
457	  and the machine will be treated as an EV6.
458
459config ALPHA_MCPCIA
460	bool
461	depends on ALPHA_RAWHIDE
462	default y
463
464config ALPHA_POLARIS
465	bool
466	depends on ALPHA_RX164
467	default y
468
469config ALPHA_IRONGATE
470	bool
471	depends on ALPHA_NAUTILUS
472	default y
473
474config GENERIC_HWEIGHT
475	bool
476	default y if !ALPHA_EV67
477
478config ALPHA_AVANTI
479	bool
480	depends on ALPHA_XL || ALPHA_AVANTI_CH
481	default y
482	help
483	  Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
484	  Alphas. Info at
485	  <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
486
487config ALPHA_BROKEN_IRQ_MASK
488	bool
489	depends on ALPHA_GENERIC || ALPHA_PC164
490	default y
491
492config VGA_HOSE
493	bool
494	depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
495	default y
496	help
497	  Support VGA on an arbitrary hose; needed for several platforms
498	  which always have multiple hoses, and whose consoles support it.
499
500
501config ALPHA_QEMU
502	bool "Run under QEMU emulation"
503	depends on !ALPHA_GENERIC
504	---help---
505	  Assume the presence of special features supported by QEMU PALcode
506	  that reduce the overhead of system emulation.
507
508	  Generic kernels will auto-detect QEMU.  But when building a
509	  system-specific kernel, the assumption is that we want to
510	  elimiate as many runtime tests as possible.
511
512	  If unsure, say N.
513
514
515config ALPHA_SRM
516	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
517	depends on TTY
518	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
519	---help---
520	  There are two different types of booting firmware on Alphas: SRM,
521	  which is command line driven, and ARC, which uses menus and arrow
522	  keys. Details about the Linux/Alpha booting process are contained in
523	  the Linux/Alpha FAQ, accessible on the WWW from
524	  <http://www.alphalinux.org/>.
525
526	  The usual way to load Linux on an Alpha machine is to use MILO
527	  (a bootloader that lets you pass command line parameters to the
528	  kernel just like lilo does for the x86 architecture) which can be
529	  loaded either from ARC or can be installed directly as a permanent
530	  firmware replacement from floppy (which requires changing a certain
531	  jumper on the motherboard). If you want to do either of these, say N
532	  here. If MILO doesn't work on your system (true for Jensen
533	  motherboards), you can bypass it altogether and boot Linux directly
534	  from an SRM console; say Y here in order to do that. Note that you
535	  won't be able to boot from an IDE disk using SRM.
536
537	  If unsure, say N.
538
539config EISA
540	bool
541	depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
542	default y
543
544config ARCH_MAY_HAVE_PC_FDC
545	def_bool y
546
547config SMP
548	bool "Symmetric multi-processing support"
549	depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
550	---help---
551	  This enables support for systems with more than one CPU. If you have
552	  a system with only one CPU, say N. If you have a system with more
553	  than one CPU, say Y.
554
555	  If you say N here, the kernel will run on uni- and multiprocessor
556	  machines, but will use only one CPU of a multiprocessor machine. If
557	  you say Y here, the kernel will run on many, but not all,
558	  uniprocessor machines. On a uniprocessor machine, the kernel
559	  will run faster if you say N here.
560
561	  See also the SMP-HOWTO available at
562	  <http://www.tldp.org/docs.html#howto>.
563
564	  If you don't know what to do here, say N.
565
566config HAVE_DEC_LOCK
567	bool
568	depends on SMP
569	default y
570
571config NR_CPUS
572	int "Maximum number of CPUs (2-32)"
573	range 2 32
574	depends on SMP
575	default "32" if ALPHA_GENERIC || ALPHA_MARVEL
576	default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
577	help
578	  MARVEL support can handle a maximum of 32 CPUs, all the others
579          with working support have a maximum of 4 CPUs.
580
581config ARCH_DISCONTIGMEM_ENABLE
582	bool "Discontiguous Memory Support"
583	help
584	  Say Y to support efficient handling of discontiguous physical memory,
585	  for architectures which are either NUMA (Non-Uniform Memory Access)
586	  or have huge holes in the physical address space for other reasons.
587	  See <file:Documentation/vm/numa> for more.
588
589source "mm/Kconfig"
590
591config NUMA
592	bool "NUMA Support (EXPERIMENTAL)"
593	depends on DISCONTIGMEM && BROKEN
594	help
595	  Say Y to compile the kernel to support NUMA (Non-Uniform Memory
596	  Access).  This option is for configuring high-end multiprocessor
597	  server machines.  If in doubt, say N.
598
599config ALPHA_WTINT
600	bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
601	default y if ALPHA_QEMU
602	default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
603	default n if !ALPHA_SRM && !ALPHA_GENERIC
604	default y if SMP
605	---help---
606	  The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
607	  to sleep until the next interrupt.  This may reduce the power
608	  consumed, and the heat produced by the computer.  However, it has
609	  the side effect of making the cycle counter unreliable as a timing
610	  device across the sleep.
611
612	  For emulation under QEMU, definitely say Y here, as we have other
613	  mechanisms for measuring time than the cycle counter.
614
615	  For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
616	  MILO, sleep mode is not supported so you might as well say N here.
617
618	  For SMP systems we cannot use the cycle counter for timing anyway,
619	  so you might as well say Y here.
620
621	  If unsure, say N.
622
623config NODES_SHIFT
624	int
625	default "7"
626	depends on NEED_MULTIPLE_NODES
627
628# LARGE_VMALLOC is racy, if you *really* need it then fix it first
629config ALPHA_LARGE_VMALLOC
630	bool
631	---help---
632	  Process creation and other aspects of virtual memory management can
633	  be streamlined if we restrict the kernel to one PGD for all vmalloc
634	  allocations.  This equates to about 8GB.
635
636	  Under normal circumstances, this is so far and above what is needed
637	  as to be laughable.  However, there are certain applications (such
638	  as benchmark-grade in-kernel web serving) that can make use of as
639	  much vmalloc space as is available.
640
641	  Say N unless you know you need gobs and gobs of vmalloc space.
642
643config VERBOSE_MCHECK
644	bool "Verbose Machine Checks"
645
646config VERBOSE_MCHECK_ON
647	int "Verbose Printing Mode (0=off, 1=on, 2=all)"
648	depends on VERBOSE_MCHECK
649	default 1
650	---help---
651	  This option allows the default printing mode to be set, and then
652	  possibly overridden by a boot command argument.
653
654	  For example, if one wanted the option of printing verbose
655	  machine checks, but wanted the default to be as if verbose
656	  machine check printing was turned off, then one would choose
657	  the printing mode to be 0. Then, upon reboot, one could add
658	  the boot command line "verbose_mcheck=1" to get the normal
659	  verbose machine check printing, or "verbose_mcheck=2" to get
660	  the maximum information available.
661
662	  Take the default (1) unless you want more control or more info.
663
664choice
665	prompt "Timer interrupt frequency (HZ)?"
666	default HZ_128 if ALPHA_QEMU
667	default HZ_1200 if ALPHA_RAWHIDE
668	default HZ_1024
669	---help---
670	  The frequency at which timer interrupts occur.  A high frequency
671	  minimizes latency, whereas a low frequency minimizes overhead of
672	  process accounting.  The later effect is especially significant
673	  when being run under QEMU.
674
675	  Note that some Alpha hardware cannot change the interrupt frequency
676	  of the timer.  If unsure, say 1024 (or 1200 for Rawhide).
677
678	config HZ_32
679		bool "32 Hz"
680	config HZ_64
681		bool "64 Hz"
682	config HZ_128
683		bool "128 Hz"
684	config HZ_256
685		bool "256 Hz"
686	config HZ_1024
687		bool "1024 Hz"
688	config HZ_1200
689		bool "1200 Hz"
690endchoice
691
692config HZ
693	int
694	default 32 if HZ_32
695	default 64 if HZ_64
696	default 128 if HZ_128
697	default 256 if HZ_256
698	default 1200 if HZ_1200
699	default 1024
700
701source "drivers/pci/Kconfig"
702source "drivers/eisa/Kconfig"
703
704source "drivers/pcmcia/Kconfig"
705
706config SRM_ENV
707	tristate "SRM environment through procfs"
708	depends on PROC_FS
709	---help---
710	  If you enable this option, a subdirectory inside /proc called
711	  /proc/srm_environment will give you access to the all important
712	  SRM environment variables (those which have a name) and also
713	  to all others (by their internal number).
714
715	  SRM is something like a BIOS for Alpha machines. There are some
716	  other such BIOSes, like AlphaBIOS, which this driver cannot
717	  support (hey, that's not SRM!).
718
719	  Despite the fact that this driver doesn't work on all Alphas (but
720	  only on those which have SRM as their firmware), it's save to
721	  build it even if your particular machine doesn't know about SRM
722	  (or if you intend to compile a generic kernel). It will simply
723	  not create those subdirectory in /proc (and give you some warning,
724	  of course).
725
726	  This driver is also available as a module and will be called
727	  srm_env then.
728
729source "fs/Kconfig.binfmt"
730
731endmenu
732
733source "net/Kconfig"
734
735source "drivers/Kconfig"
736
737source "fs/Kconfig"
738
739source "arch/alpha/Kconfig.debug"
740
741# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
742# but we also need it if VGA_HOSE is set
743config DUMMY_CONSOLE
744	bool
745	depends on VGA_HOSE
746	default y
747
748source "security/Kconfig"
749
750source "crypto/Kconfig"
751
752source "lib/Kconfig"
753
754