xref: /openbmc/linux/arch/alpha/Kconfig (revision 6a551c11) 
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 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 ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
19	select AUDIT_ARCH
20	select GENERIC_CLOCKEVENTS
21	select GENERIC_SMP_IDLE_THREAD
22	select GENERIC_STRNCPY_FROM_USER
23	select GENERIC_STRNLEN_USER
24	select HAVE_ARCH_AUDITSYSCALL
25	select HAVE_MOD_ARCH_SPECIFIC
26	select MODULES_USE_ELF_RELA
27	select ODD_RT_SIGACTION
28	select OLD_SIGSUSPEND
29	select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
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
36config 64BIT
37	def_bool y
38
39config MMU
40	bool
41	default y
42
43config RWSEM_GENERIC_SPINLOCK
44	bool
45
46config RWSEM_XCHGADD_ALGORITHM
47	bool
48	default y
49
50config ARCH_HAS_ILOG2_U32
51	bool
52	default n
53
54config ARCH_HAS_ILOG2_U64
55	bool
56	default n
57
58config GENERIC_CALIBRATE_DELAY
59	bool
60	default y
61
62config ZONE_DMA
63	bool
64	default y
65
66config ARCH_DMA_ADDR_T_64BIT
67	def_bool y
68
69config NEED_DMA_MAP_STATE
70       def_bool y
71
72config NEED_SG_DMA_LENGTH
73	def_bool y
74
75config GENERIC_ISA_DMA
76	bool
77	default y
78
79config PGTABLE_LEVELS
80	int
81	default 3
82
83source "init/Kconfig"
84source "kernel/Kconfig.freezer"
85
86config AUDIT_ARCH
87	bool
88
89menu "System setup"
90
91choice
92	prompt "Alpha system type"
93	default ALPHA_GENERIC
94	---help---
95	  This is the system type of your hardware.  A "generic" kernel will
96	  run on any supported Alpha system. However, if you configure a
97	  kernel for your specific system, it will be faster and smaller.
98
99	  To find out what type of Alpha system you have, you may want to
100	  check out the Linux/Alpha FAQ, accessible on the WWW from
101	  <http://www.alphalinux.org/>. In summary:
102
103	  Alcor/Alpha-XLT     AS 600, AS 500, XL-300, XL-366
104	  Alpha-XL            XL-233, XL-266
105	  AlphaBook1          Alpha laptop
106	  Avanti              AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
107	  Cabriolet           AlphaPC64, AlphaPCI64
108	  DP264               DP264 / DS20 / ES40 / DS10 / DS10L
109	  EB164               EB164 21164 evaluation board
110	  EB64+               EB64+ 21064 evaluation board
111	  EB66                EB66 21066 evaluation board
112	  EB66+               EB66+ 21066 evaluation board
113	  Jensen              DECpc 150, DEC 2000 models 300, 500
114	  LX164               AlphaPC164-LX
115	  Lynx                AS 2100A
116	  Miata               Personal Workstation 433/500/600 a/au
117	  Marvel              AlphaServer ES47 / ES80 / GS1280
118	  Mikasa              AS 1000
119	  Noname              AXPpci33, UDB (Multia)
120	  Noritake            AS 1000A, AS 600A, AS 800
121	  PC164               AlphaPC164
122	  Rawhide             AS 1200, AS 4000, AS 4100
123	  Ruffian             RPX164-2, AlphaPC164-UX, AlphaPC164-BX
124	  SX164               AlphaPC164-SX
125	  Sable               AS 2000, AS 2100
126	  Shark               DS 20L
127	  Takara              Takara (OEM)
128	  Titan               AlphaServer ES45 / DS25 / DS15
129	  Wildfire            AlphaServer GS 40/80/160/320
130
131	  If you don't know what to do, choose "generic".
132
133config ALPHA_GENERIC
134	bool "Generic"
135	depends on TTY
136	help
137	  A generic kernel will run on all supported Alpha hardware.
138
139config ALPHA_ALCOR
140	bool "Alcor/Alpha-XLT"
141	help
142	  For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
143	  slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
144	  Address, CIA) - a 383 pin plastic PGA).  It provides a DRAM
145	  controller (256-bit memory bus) and a PCI interface.  It also does
146	  all the work required to support an external Bcache and to maintain
147	  memory coherence when a PCI device DMAs into (or out of) memory.
148
149config ALPHA_XL
150	bool "Alpha-XL"
151	help
152	  XL-233 and XL-266-based Alpha systems.
153
154config ALPHA_BOOK1
155	bool "AlphaBook1"
156	help
157	  Dec AlphaBook1/Burns Alpha-based laptops.
158
159config ALPHA_AVANTI_CH
160	bool "Avanti"
161
162config ALPHA_CABRIOLET
163	bool "Cabriolet"
164	help
165	  Cabriolet AlphaPC64, AlphaPCI64 systems.  Derived from EB64+ but now
166	  baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
167	  slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
168	  Bcache SIMMs.  Requires power supply with 3.3V output.
169
170config ALPHA_DP264
171	bool "DP264"
172	help
173	  Various 21264 systems with the tsunami core logic chipset.
174	  API Networks: 264DP, UP2000(+), CS20;
175	  Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
176
177config ALPHA_EB164
178	bool "EB164"
179	help
180	  EB164 21164 evaluation board from DEC.  Uses 21164 and ALCOR.  Has
181	  ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
182	  shared with an ISA slot) and 2 32-bit PCI slots.  Uses plus-in
183	  Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
184	  MOUSE (PS2 style), RTC/NVRAM.  Boot ROM is Flash.  PC-AT-sized
185	  motherboard.  Requires power supply with 3.3V output.
186
187config ALPHA_EB64P_CH
188	bool "EB64+"
189
190config ALPHA_EB66
191	bool "EB66"
192	help
193	  A Digital DS group board.  Uses 21066 or 21066A.  I/O sub-system is
194	  identical to EB64+.  Baby PC-AT size.  Runs from standard PC power
195	  supply.  The EB66 schematic was published as a marketing poster
196	  advertising the 21066 as "the first microprocessor in the world with
197	  embedded PCI".
198
199config ALPHA_EB66P
200	bool "EB66+"
201	help
202	  Later variant of the EB66 board.
203
204config ALPHA_EIGER
205	bool "Eiger"
206	help
207	  Apparently an obscure OEM single-board computer based on the
208	  Typhoon/Tsunami chipset family. Information on it is scanty.
209
210config ALPHA_JENSEN
211	bool "Jensen"
212	help
213	  DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
214	  of the first-generation Alpha systems. A number of these systems
215	  seem to be available on the second- hand market. The Jensen is a
216	  floor-standing tower system which originally used a 150MHz 21064 It
217	  used programmable logic to interface a 486 EISA I/O bridge to the
218	  CPU.
219
220config ALPHA_LX164
221	bool "LX164"
222	help
223	  A technical overview of this board is available at
224	  <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
225
226config ALPHA_LYNX
227	bool "Lynx"
228	help
229	  AlphaServer 2100A-based systems.
230
231config ALPHA_MARVEL
232	bool "Marvel"
233	help
234	  AlphaServer ES47 / ES80 / GS1280 based on EV7.
235
236config ALPHA_MIATA
237	bool "Miata"
238	help
239	  The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
240	  or 600au).
241
242config ALPHA_MIKASA
243	bool "Mikasa"
244	help
245	  AlphaServer 1000-based Alpha systems.
246
247config ALPHA_NAUTILUS
248	bool "Nautilus"
249	help
250	  Alpha systems based on the AMD 751 & ALI 1543C chipsets.
251
252config ALPHA_NONAME_CH
253	bool "Noname"
254
255config ALPHA_NORITAKE
256	bool "Noritake"
257	help
258	  AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
259	  systems.
260
261config ALPHA_PC164
262	bool "PC164"
263
264config ALPHA_P2K
265	bool "Platform2000"
266
267config ALPHA_RAWHIDE
268	bool "Rawhide"
269	help
270	  AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
271	  See HOWTO at
272	  <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
273
274config ALPHA_RUFFIAN
275	bool "Ruffian"
276	help
277	  Samsung APC164UX.  There is a page on known problems and workarounds
278	  at <http://www.alphalinux.org/faq/FAQ-11.html>.
279
280config ALPHA_RX164
281	bool "RX164"
282
283config ALPHA_SX164
284	bool "SX164"
285
286config ALPHA_SABLE
287	bool "Sable"
288	help
289	  Digital AlphaServer 2000 and 2100-based systems.
290
291config ALPHA_SHARK
292	bool "Shark"
293
294config ALPHA_TAKARA
295	bool "Takara"
296	help
297	  Alpha 11164-based OEM single-board computer.
298
299config ALPHA_TITAN
300	bool "Titan"
301	help
302	  AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
303
304config ALPHA_WILDFIRE
305	bool "Wildfire"
306	help
307	  AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
308
309endchoice
310
311# clear all implied options (don't want default values for those):
312# Most of these machines have ISA slots; not exactly sure which don't,
313# and this doesn't activate hordes of code, so do it always.
314config ISA
315	bool
316	default y
317	help
318	  Find out whether you have ISA slots on your motherboard.  ISA is the
319	  name of a bus system, i.e. the way the CPU talks to the other stuff
320	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
321	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
322	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
323
324config ISA_DMA_API
325	bool
326	default y
327
328config PCI
329	bool
330	depends on !ALPHA_JENSEN
331	select GENERIC_PCI_IOMAP
332	default y
333	help
334	  Find out whether you have a PCI motherboard. PCI is the name of a
335	  bus system, i.e. the way the CPU talks to the other stuff inside
336	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
337	  VESA. If you have PCI, say Y, otherwise N.
338
339config PCI_DOMAINS
340	bool
341	default y
342
343config PCI_SYSCALL
344	def_bool PCI
345
346config IOMMU_HELPER
347	def_bool PCI
348
349config ALPHA_NONAME
350	bool
351	depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
352	default y
353	help
354	  The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
355	  UDB).  This design was produced by Digital's Technical OEM (TOEM)
356	  group. It uses the 21066 processor running at 166MHz or 233MHz. It
357	  is a baby-AT size, and runs from a standard PC power supply. It has
358	  5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
359	  2 versions, with either PS/2 or large DIN connectors for the
360	  keyboard.
361
362config ALPHA_EV4
363	bool
364	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
365	default y if !ALPHA_LYNX
366
367config ALPHA_LCA
368	bool
369	depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
370	default y
371
372config ALPHA_APECS
373	bool
374	depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
375	default y
376
377config ALPHA_EB64P
378	bool
379	depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
380	default y
381	help
382	  Uses 21064 or 21064A and APECs.  Has ISA and PCI expansion (3 ISA,
383	  2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
384	  ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
385	  (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
386	  SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM.  PC-AT size.
387	  Runs from standard PC power supply.
388
389config ALPHA_EV5
390	bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
391	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
392
393config ALPHA_EV4
394	bool
395	default y if ALPHA_LYNX && !ALPHA_EV5
396
397config ALPHA_CIA
398	bool
399	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
400	default y
401
402config ALPHA_EV56
403	bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
404	default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
405
406config ALPHA_EV56
407	prompt "EV56 CPU (speed >= 333MHz)?"
408	depends on ALPHA_NORITAKE || ALPHA_PRIMO
409
410config ALPHA_EV56
411	prompt "EV56 CPU (speed >= 400MHz)?"
412	depends on ALPHA_RAWHIDE
413
414config ALPHA_PRIMO
415	bool "EV5 CPU daughtercard (model 5/xxx)?"
416	depends on ALPHA_NORITAKE || ALPHA_MIKASA
417	help
418	  Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
419
420config ALPHA_GAMMA
421	bool "EV5 CPU(s) (model 5/xxx)?"
422	depends on ALPHA_SABLE
423	help
424	  Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
425
426config ALPHA_GAMMA
427	bool
428	depends on ALPHA_LYNX
429	default y
430
431config ALPHA_T2
432	bool
433	depends on ALPHA_SABLE || ALPHA_LYNX
434	default y
435
436config ALPHA_PYXIS
437	bool
438	depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
439	default y
440
441config ALPHA_EV6
442	bool
443	depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
444	default y
445
446config ALPHA_TSUNAMI
447	bool
448	depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
449	default y
450
451config ALPHA_EV67
452	bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
453	default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
454	help
455	  Is this a machine based on the EV67 core?  If in doubt, select N here
456	  and the machine will be treated as an EV6.
457
458config ALPHA_MCPCIA
459	bool
460	depends on ALPHA_RAWHIDE
461	default y
462
463config ALPHA_POLARIS
464	bool
465	depends on ALPHA_RX164
466	default y
467
468config ALPHA_IRONGATE
469	bool
470	depends on ALPHA_NAUTILUS
471	default y
472
473config GENERIC_HWEIGHT
474	bool
475	default y if !ALPHA_EV67
476
477config ALPHA_AVANTI
478	bool
479	depends on ALPHA_XL || ALPHA_AVANTI_CH
480	default y
481	help
482	  Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
483	  Alphas. Info at
484	  <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
485
486config ALPHA_BROKEN_IRQ_MASK
487	bool
488	depends on ALPHA_GENERIC || ALPHA_PC164
489	default y
490
491config VGA_HOSE
492	bool
493	depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
494	default y
495	help
496	  Support VGA on an arbitrary hose; needed for several platforms
497	  which always have multiple hoses, and whose consoles support it.
498
499
500config ALPHA_QEMU
501	bool "Run under QEMU emulation"
502	depends on !ALPHA_GENERIC
503	---help---
504	  Assume the presence of special features supported by QEMU PALcode
505	  that reduce the overhead of system emulation.
506
507	  Generic kernels will auto-detect QEMU.  But when building a
508	  system-specific kernel, the assumption is that we want to
509	  elimiate as many runtime tests as possible.
510
511	  If unsure, say N.
512
513
514config ALPHA_SRM
515	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
516	depends on TTY
517	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
518	---help---
519	  There are two different types of booting firmware on Alphas: SRM,
520	  which is command line driven, and ARC, which uses menus and arrow
521	  keys. Details about the Linux/Alpha booting process are contained in
522	  the Linux/Alpha FAQ, accessible on the WWW from
523	  <http://www.alphalinux.org/>.
524
525	  The usual way to load Linux on an Alpha machine is to use MILO
526	  (a bootloader that lets you pass command line parameters to the
527	  kernel just like lilo does for the x86 architecture) which can be
528	  loaded either from ARC or can be installed directly as a permanent
529	  firmware replacement from floppy (which requires changing a certain
530	  jumper on the motherboard). If you want to do either of these, say N
531	  here. If MILO doesn't work on your system (true for Jensen
532	  motherboards), you can bypass it altogether and boot Linux directly
533	  from an SRM console; say Y here in order to do that. Note that you
534	  won't be able to boot from an IDE disk using SRM.
535
536	  If unsure, say N.
537
538config EISA
539	bool
540	depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
541	default y
542
543config ARCH_MAY_HAVE_PC_FDC
544	def_bool y
545
546config SMP
547	bool "Symmetric multi-processing support"
548	depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
549	---help---
550	  This enables support for systems with more than one CPU. If you have
551	  a system with only one CPU, say N. If you have a system with more
552	  than one CPU, say Y.
553
554	  If you say N here, the kernel will run on uni- and multiprocessor
555	  machines, but will use only one CPU of a multiprocessor machine. If
556	  you say Y here, the kernel will run on many, but not all,
557	  uniprocessor machines. On a uniprocessor machine, the kernel
558	  will run faster if you say N here.
559
560	  See also the SMP-HOWTO available at
561	  <http://www.tldp.org/docs.html#howto>.
562
563	  If you don't know what to do here, say N.
564
565config HAVE_DEC_LOCK
566	bool
567	depends on SMP
568	default y
569
570config NR_CPUS
571	int "Maximum number of CPUs (2-32)"
572	range 2 32
573	depends on SMP
574	default "32" if ALPHA_GENERIC || ALPHA_MARVEL
575	default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
576	help
577	  MARVEL support can handle a maximum of 32 CPUs, all the others
578          with working support have a maximum of 4 CPUs.
579
580config ARCH_DISCONTIGMEM_ENABLE
581	bool "Discontiguous Memory Support"
582	help
583	  Say Y to support efficient handling of discontiguous physical memory,
584	  for architectures which are either NUMA (Non-Uniform Memory Access)
585	  or have huge holes in the physical address space for other reasons.
586	  See <file:Documentation/vm/numa> for more.
587
588source "mm/Kconfig"
589
590config NUMA
591	bool "NUMA Support (EXPERIMENTAL)"
592	depends on DISCONTIGMEM && BROKEN
593	help
594	  Say Y to compile the kernel to support NUMA (Non-Uniform Memory
595	  Access).  This option is for configuring high-end multiprocessor
596	  server machines.  If in doubt, say N.
597
598config ALPHA_WTINT
599	bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
600	default y if ALPHA_QEMU
601	default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
602	default n if !ALPHA_SRM && !ALPHA_GENERIC
603	default y if SMP
604	---help---
605	  The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
606	  to sleep until the next interrupt.  This may reduce the power
607	  consumed, and the heat produced by the computer.  However, it has
608	  the side effect of making the cycle counter unreliable as a timing
609	  device across the sleep.
610
611	  For emulation under QEMU, definitely say Y here, as we have other
612	  mechanisms for measuring time than the cycle counter.
613
614	  For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
615	  MILO, sleep mode is not supported so you might as well say N here.
616
617	  For SMP systems we cannot use the cycle counter for timing anyway,
618	  so you might as well say Y here.
619
620	  If unsure, say N.
621
622config NODES_SHIFT
623	int
624	default "7"
625	depends on NEED_MULTIPLE_NODES
626
627# LARGE_VMALLOC is racy, if you *really* need it then fix it first
628config ALPHA_LARGE_VMALLOC
629	bool
630	---help---
631	  Process creation and other aspects of virtual memory management can
632	  be streamlined if we restrict the kernel to one PGD for all vmalloc
633	  allocations.  This equates to about 8GB.
634
635	  Under normal circumstances, this is so far and above what is needed
636	  as to be laughable.  However, there are certain applications (such
637	  as benchmark-grade in-kernel web serving) that can make use of as
638	  much vmalloc space as is available.
639
640	  Say N unless you know you need gobs and gobs of vmalloc space.
641
642config VERBOSE_MCHECK
643	bool "Verbose Machine Checks"
644
645config VERBOSE_MCHECK_ON
646	int "Verbose Printing Mode (0=off, 1=on, 2=all)"
647	depends on VERBOSE_MCHECK
648	default 1
649	---help---
650	  This option allows the default printing mode to be set, and then
651	  possibly overridden by a boot command argument.
652
653	  For example, if one wanted the option of printing verbose
654	  machine checks, but wanted the default to be as if verbose
655	  machine check printing was turned off, then one would choose
656	  the printing mode to be 0. Then, upon reboot, one could add
657	  the boot command line "verbose_mcheck=1" to get the normal
658	  verbose machine check printing, or "verbose_mcheck=2" to get
659	  the maximum information available.
660
661	  Take the default (1) unless you want more control or more info.
662
663choice
664	prompt "Timer interrupt frequency (HZ)?"
665	default HZ_128 if ALPHA_QEMU
666	default HZ_1200 if ALPHA_RAWHIDE
667	default HZ_1024
668	---help---
669	  The frequency at which timer interrupts occur.  A high frequency
670	  minimizes latency, whereas a low frequency minimizes overhead of
671	  process accounting.  The later effect is especially significant
672	  when being run under QEMU.
673
674	  Note that some Alpha hardware cannot change the interrupt frequency
675	  of the timer.  If unsure, say 1024 (or 1200 for Rawhide).
676
677	config HZ_32
678		bool "32 Hz"
679	config HZ_64
680		bool "64 Hz"
681	config HZ_128
682		bool "128 Hz"
683	config HZ_256
684		bool "256 Hz"
685	config HZ_1024
686		bool "1024 Hz"
687	config HZ_1200
688		bool "1200 Hz"
689endchoice
690
691config HZ
692	int
693	default 32 if HZ_32
694	default 64 if HZ_64
695	default 128 if HZ_128
696	default 256 if HZ_256
697	default 1200 if HZ_1200
698	default 1024
699
700source "drivers/pci/Kconfig"
701source "drivers/eisa/Kconfig"
702
703source "drivers/pcmcia/Kconfig"
704
705config SRM_ENV
706	tristate "SRM environment through procfs"
707	depends on PROC_FS
708	---help---
709	  If you enable this option, a subdirectory inside /proc called
710	  /proc/srm_environment will give you access to the all important
711	  SRM environment variables (those which have a name) and also
712	  to all others (by their internal number).
713
714	  SRM is something like a BIOS for Alpha machines. There are some
715	  other such BIOSes, like AlphaBIOS, which this driver cannot
716	  support (hey, that's not SRM!).
717
718	  Despite the fact that this driver doesn't work on all Alphas (but
719	  only on those which have SRM as their firmware), it's save to
720	  build it even if your particular machine doesn't know about SRM
721	  (or if you intend to compile a generic kernel). It will simply
722	  not create those subdirectory in /proc (and give you some warning,
723	  of course).
724
725	  This driver is also available as a module and will be called
726	  srm_env then.
727
728source "fs/Kconfig.binfmt"
729
730endmenu
731
732source "net/Kconfig"
733
734source "drivers/Kconfig"
735
736source "fs/Kconfig"
737
738source "arch/alpha/Kconfig.debug"
739
740# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
741# but we also need it if VGA_HOSE is set
742config DUMMY_CONSOLE
743	bool
744	depends on VGA_HOSE
745	default y
746
747source "security/Kconfig"
748
749source "crypto/Kconfig"
750
751source "lib/Kconfig"
752
753