1# SPDX-License-Identifier: GPL-2.0
2config ALPHA
3	bool
4	default y
5	select ARCH_32BIT_USTAT_F_TINODE
6	select ARCH_MIGHT_HAVE_PC_PARPORT
7	select ARCH_MIGHT_HAVE_PC_SERIO
8	select ARCH_NO_PREEMPT
9	select ARCH_NO_SG_CHAIN
10	select ARCH_USE_CMPXCHG_LOCKREF
11	select DMA_OPS if PCI
12	select FORCE_PCI if !ALPHA_JENSEN
13	select PCI_DOMAINS if PCI
14	select PCI_SYSCALL if PCI
15	select HAVE_ASM_MODVERSIONS
16	select HAVE_PCSPKR_PLATFORM
17	select HAVE_PERF_EVENTS
18	select NEED_DMA_MAP_STATE
19	select NEED_SG_DMA_LENGTH
20	select GENERIC_IRQ_PROBE
21	select GENERIC_PCI_IOMAP
22	select AUTO_IRQ_AFFINITY if SMP
23	select GENERIC_IRQ_SHOW
24	select ARCH_WANT_IPC_PARSE_VERSION
25	select ARCH_HAVE_NMI_SAFE_CMPXCHG
26	select AUDIT_ARCH
27	select GENERIC_CPU_VULNERABILITIES
28	select GENERIC_SMP_IDLE_THREAD
29	select HAVE_ARCH_AUDITSYSCALL
30	select HAVE_MOD_ARCH_SPECIFIC
31	select MODULES_USE_ELF_RELA
32	select ODD_RT_SIGACTION
33	select OLD_SIGSUSPEND
34	select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
35	select MMU_GATHER_NO_RANGE
36	select SPARSEMEM_EXTREME if SPARSEMEM
37	select ZONE_DMA
38	help
39	  The Alpha is a 64-bit general-purpose processor designed and
40	  marketed by the Digital Equipment Corporation of blessed memory,
41	  now Hewlett-Packard.  The Alpha Linux project has a home page at
42	  <http://www.alphalinux.org/>.
43
44config 64BIT
45	def_bool y
46
47config MMU
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 GENERIC_ISA_DMA
64	bool
65	default y
66
67config PGTABLE_LEVELS
68	int
69	default 3
70
71config AUDIT_ARCH
72	bool
73
74menu "System setup"
75
76choice
77	prompt "Alpha system type"
78	default ALPHA_GENERIC
79	help
80	  This is the system type of your hardware.  A "generic" kernel will
81	  run on any supported Alpha system. However, if you configure a
82	  kernel for your specific system, it will be faster and smaller.
83
84	  To find out what type of Alpha system you have, you may want to
85	  check out the Linux/Alpha FAQ, accessible on the WWW from
86	  <http://www.alphalinux.org/>. In summary:
87
88	  Alcor/Alpha-XLT     AS 600, AS 500, XL-300, XL-366
89	  Alpha-XL            XL-233, XL-266
90	  AlphaBook1          Alpha laptop
91	  Avanti              AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
92	  Cabriolet           AlphaPC64, AlphaPCI64
93	  DP264               DP264 / DS20 / ES40 / DS10 / DS10L
94	  EB164               EB164 21164 evaluation board
95	  EB64+               EB64+ 21064 evaluation board
96	  EB66                EB66 21066 evaluation board
97	  EB66+               EB66+ 21066 evaluation board
98	  Jensen              DECpc 150, DEC 2000 models 300, 500
99	  LX164               AlphaPC164-LX
100	  Lynx                AS 2100A
101	  Miata               Personal Workstation 433/500/600 a/au
102	  Marvel              AlphaServer ES47 / ES80 / GS1280
103	  Mikasa              AS 1000
104	  Noname              AXPpci33, UDB (Multia)
105	  Noritake            AS 1000A, AS 600A, AS 800
106	  PC164               AlphaPC164
107	  Rawhide             AS 1200, AS 4000, AS 4100
108	  Ruffian             RPX164-2, AlphaPC164-UX, AlphaPC164-BX
109	  SX164               AlphaPC164-SX
110	  Sable               AS 2000, AS 2100
111	  Shark               DS 20L
112	  Takara              Takara (OEM)
113	  Titan               AlphaServer ES45 / DS25 / DS15
114	  Wildfire            AlphaServer GS 40/80/160/320
115
116	  If you don't know what to do, choose "generic".
117
118config ALPHA_GENERIC
119	bool "Generic"
120	depends on TTY
121	select HAVE_EISA
122	help
123	  A generic kernel will run on all supported Alpha hardware.
124
125config ALPHA_ALCOR
126	bool "Alcor/Alpha-XLT"
127	select HAVE_EISA
128	help
129	  For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
130	  slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
131	  Address, CIA) - a 383 pin plastic PGA).  It provides a DRAM
132	  controller (256-bit memory bus) and a PCI interface.  It also does
133	  all the work required to support an external Bcache and to maintain
134	  memory coherence when a PCI device DMAs into (or out of) memory.
135
136config ALPHA_XL
137	bool "Alpha-XL"
138	help
139	  XL-233 and XL-266-based Alpha systems.
140
141config ALPHA_BOOK1
142	bool "AlphaBook1"
143	help
144	  Dec AlphaBook1/Burns Alpha-based laptops.
145
146config ALPHA_AVANTI_CH
147	bool "Avanti"
148
149config ALPHA_CABRIOLET
150	bool "Cabriolet"
151	help
152	  Cabriolet AlphaPC64, AlphaPCI64 systems.  Derived from EB64+ but now
153	  baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
154	  slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
155	  Bcache SIMMs.  Requires power supply with 3.3V output.
156
157config ALPHA_DP264
158	bool "DP264"
159	help
160	  Various 21264 systems with the tsunami core logic chipset.
161	  API Networks: 264DP, UP2000(+), CS20;
162	  Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
163
164config ALPHA_EB164
165	bool "EB164"
166	help
167	  EB164 21164 evaluation board from DEC.  Uses 21164 and ALCOR.  Has
168	  ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
169	  shared with an ISA slot) and 2 32-bit PCI slots.  Uses plus-in
170	  Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
171	  MOUSE (PS2 style), RTC/NVRAM.  Boot ROM is Flash.  PC-AT-sized
172	  motherboard.  Requires power supply with 3.3V output.
173
174config ALPHA_EB64P_CH
175	bool "EB64+"
176
177config ALPHA_EB66
178	bool "EB66"
179	help
180	  A Digital DS group board.  Uses 21066 or 21066A.  I/O sub-system is
181	  identical to EB64+.  Baby PC-AT size.  Runs from standard PC power
182	  supply.  The EB66 schematic was published as a marketing poster
183	  advertising the 21066 as "the first microprocessor in the world with
184	  embedded PCI".
185
186config ALPHA_EB66P
187	bool "EB66+"
188	help
189	  Later variant of the EB66 board.
190
191config ALPHA_EIGER
192	bool "Eiger"
193	help
194	  Apparently an obscure OEM single-board computer based on the
195	  Typhoon/Tsunami chipset family. Information on it is scanty.
196
197config ALPHA_JENSEN
198	bool "Jensen"
199	select HAVE_EISA
200	help
201	  DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
202	  of the first-generation Alpha systems. A number of these systems
203	  seem to be available on the second- hand market. The Jensen is a
204	  floor-standing tower system which originally used a 150MHz 21064 It
205	  used programmable logic to interface a 486 EISA I/O bridge to the
206	  CPU.
207
208config ALPHA_LX164
209	bool "LX164"
210	help
211	  A technical overview of this board is available at
212	  <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
213
214config ALPHA_LYNX
215	bool "Lynx"
216	select HAVE_EISA
217	help
218	  AlphaServer 2100A-based systems.
219
220config ALPHA_MARVEL
221	bool "Marvel"
222	help
223	  AlphaServer ES47 / ES80 / GS1280 based on EV7.
224
225config ALPHA_MIATA
226	bool "Miata"
227	select HAVE_EISA
228	help
229	  The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
230	  or 600au).
231
232config ALPHA_MIKASA
233	bool "Mikasa"
234	help
235	  AlphaServer 1000-based Alpha systems.
236
237config ALPHA_NAUTILUS
238	bool "Nautilus"
239	help
240	  Alpha systems based on the AMD 751 & ALI 1543C chipsets.
241
242config ALPHA_NONAME_CH
243	bool "Noname"
244
245config ALPHA_NORITAKE
246	bool "Noritake"
247	select HAVE_EISA
248	help
249	  AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
250	  systems.
251
252config ALPHA_PC164
253	bool "PC164"
254
255config ALPHA_P2K
256	bool "Platform2000"
257
258config ALPHA_RAWHIDE
259	bool "Rawhide"
260	select HAVE_EISA
261	help
262	  AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
263	  See HOWTO at
264	  <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
265
266config ALPHA_RUFFIAN
267	bool "Ruffian"
268	help
269	  Samsung APC164UX.  There is a page on known problems and workarounds
270	  at <http://www.alphalinux.org/faq/FAQ-11.html>.
271
272config ALPHA_RX164
273	bool "RX164"
274
275config ALPHA_SX164
276	bool "SX164"
277
278config ALPHA_SABLE
279	bool "Sable"
280	select HAVE_EISA
281	help
282	  Digital AlphaServer 2000 and 2100-based systems.
283
284config ALPHA_SHARK
285	bool "Shark"
286
287config ALPHA_TAKARA
288	bool "Takara"
289	help
290	  Alpha 11164-based OEM single-board computer.
291
292config ALPHA_TITAN
293	bool "Titan"
294	help
295	  AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
296
297config ALPHA_WILDFIRE
298	bool "Wildfire"
299	help
300	  AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
301
302endchoice
303
304# clear all implied options (don't want default values for those):
305# Most of these machines have ISA slots; not exactly sure which don't,
306# and this doesn't activate hordes of code, so do it always.
307config ISA
308	bool
309	default y
310	help
311	  Find out whether you have ISA slots on your motherboard.  ISA is the
312	  name of a bus system, i.e. the way the CPU talks to the other stuff
313	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
314	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
315	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
316
317config ISA_DMA_API
318	bool
319	default y
320
321config ALPHA_NONAME
322	bool
323	depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
324	default y
325	help
326	  The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
327	  UDB).  This design was produced by Digital's Technical OEM (TOEM)
328	  group. It uses the 21066 processor running at 166MHz or 233MHz. It
329	  is a baby-AT size, and runs from a standard PC power supply. It has
330	  5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
331	  2 versions, with either PS/2 or large DIN connectors for the
332	  keyboard.
333
334config ALPHA_EV4
335	bool
336	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
337	default y if !ALPHA_LYNX
338
339config ALPHA_LCA
340	bool
341	depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
342	default y
343
344config ALPHA_APECS
345	bool
346	depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
347	default y
348
349config ALPHA_EB64P
350	bool
351	depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
352	default y
353	help
354	  Uses 21064 or 21064A and APECs.  Has ISA and PCI expansion (3 ISA,
355	  2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
356	  ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
357	  (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
358	  SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM.  PC-AT size.
359	  Runs from standard PC power supply.
360
361config ALPHA_EV5
362	bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
363	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
364
365config ALPHA_EV4
366	bool
367	default y if ALPHA_LYNX && !ALPHA_EV5
368
369config ALPHA_CIA
370	bool
371	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
372	default y
373
374config ALPHA_EV56
375	bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
376	default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
377
378config ALPHA_EV56
379	prompt "EV56 CPU (speed >= 333MHz)?"
380	depends on ALPHA_NORITAKE || ALPHA_PRIMO
381
382config ALPHA_EV56
383	prompt "EV56 CPU (speed >= 400MHz)?"
384	depends on ALPHA_RAWHIDE
385
386config ALPHA_PRIMO
387	bool "EV5 CPU daughtercard (model 5/xxx)?"
388	depends on ALPHA_NORITAKE || ALPHA_MIKASA
389	help
390	  Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
391
392config ALPHA_GAMMA
393	bool "EV5 CPU(s) (model 5/xxx)?"
394	depends on ALPHA_SABLE
395	help
396	  Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
397
398config ALPHA_GAMMA
399	bool
400	depends on ALPHA_LYNX
401	default y
402
403config ALPHA_T2
404	bool
405	depends on ALPHA_SABLE || ALPHA_LYNX
406	default y
407
408config ALPHA_PYXIS
409	bool
410	depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
411	default y
412
413config ALPHA_EV6
414	bool
415	depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
416	default y
417
418config ALPHA_TSUNAMI
419	bool
420	depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
421	default y
422
423config ALPHA_EV67
424	bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
425	default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
426	help
427	  Is this a machine based on the EV67 core?  If in doubt, select N here
428	  and the machine will be treated as an EV6.
429
430config ALPHA_MCPCIA
431	bool
432	depends on ALPHA_RAWHIDE
433	default y
434
435config ALPHA_POLARIS
436	bool
437	depends on ALPHA_RX164
438	default y
439
440config ALPHA_IRONGATE
441	bool
442	depends on ALPHA_NAUTILUS
443	default y
444
445config GENERIC_HWEIGHT
446	bool
447	default y if !ALPHA_EV67
448
449config ALPHA_AVANTI
450	bool
451	depends on ALPHA_XL || ALPHA_AVANTI_CH
452	default y
453	help
454	  Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
455	  Alphas. Info at
456	  <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
457
458config ALPHA_BROKEN_IRQ_MASK
459	bool
460	depends on ALPHA_GENERIC || ALPHA_PC164
461	default y
462
463config VGA_HOSE
464	bool
465	depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
466	default y
467	help
468	  Support VGA on an arbitrary hose; needed for several platforms
469	  which always have multiple hoses, and whose consoles support it.
470
471
472config ALPHA_QEMU
473	bool "Run under QEMU emulation"
474	depends on !ALPHA_GENERIC
475	help
476	  Assume the presence of special features supported by QEMU PALcode
477	  that reduce the overhead of system emulation.
478
479	  Generic kernels will auto-detect QEMU.  But when building a
480	  system-specific kernel, the assumption is that we want to
481	  eliminate as many runtime tests as possible.
482
483	  If unsure, say N.
484
485
486config ALPHA_SRM
487	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
488	depends on TTY
489	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
490	help
491	  There are two different types of booting firmware on Alphas: SRM,
492	  which is command line driven, and ARC, which uses menus and arrow
493	  keys. Details about the Linux/Alpha booting process are contained in
494	  the Linux/Alpha FAQ, accessible on the WWW from
495	  <http://www.alphalinux.org/>.
496
497	  The usual way to load Linux on an Alpha machine is to use MILO
498	  (a bootloader that lets you pass command line parameters to the
499	  kernel just like lilo does for the x86 architecture) which can be
500	  loaded either from ARC or can be installed directly as a permanent
501	  firmware replacement from floppy (which requires changing a certain
502	  jumper on the motherboard). If you want to do either of these, say N
503	  here. If MILO doesn't work on your system (true for Jensen
504	  motherboards), you can bypass it altogether and boot Linux directly
505	  from an SRM console; say Y here in order to do that. Note that you
506	  won't be able to boot from an IDE disk using SRM.
507
508	  If unsure, say N.
509
510config ARCH_MAY_HAVE_PC_FDC
511	def_bool y
512
513config SMP
514	bool "Symmetric multi-processing support"
515	depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
516	help
517	  This enables support for systems with more than one CPU. If you have
518	  a system with only one CPU, say N. If you have a system with more
519	  than one CPU, say Y.
520
521	  If you say N here, the kernel will run on uni- and multiprocessor
522	  machines, but will use only one CPU of a multiprocessor machine. If
523	  you say Y here, the kernel will run on many, but not all,
524	  uniprocessor machines. On a uniprocessor machine, the kernel
525	  will run faster if you say N here.
526
527	  See also the SMP-HOWTO available at
528	  <https://www.tldp.org/docs.html#howto>.
529
530	  If you don't know what to do here, say N.
531
532config NR_CPUS
533	int "Maximum number of CPUs (2-32)"
534	range 2 32
535	depends on SMP
536	default "32" if ALPHA_GENERIC || ALPHA_MARVEL
537	default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
538	help
539	  MARVEL support can handle a maximum of 32 CPUs, all the others
540	  with working support have a maximum of 4 CPUs.
541
542config ARCH_SPARSEMEM_ENABLE
543	bool "Sparse Memory Support"
544	help
545	  Say Y to support efficient handling of discontiguous physical memory,
546	  for systems that have huge holes in the physical address space.
547
548config ALPHA_WTINT
549	bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
550	default y if ALPHA_QEMU
551	default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
552	default n if !ALPHA_SRM && !ALPHA_GENERIC
553	default y if SMP
554	help
555	  The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
556	  to sleep until the next interrupt.  This may reduce the power
557	  consumed, and the heat produced by the computer.  However, it has
558	  the side effect of making the cycle counter unreliable as a timing
559	  device across the sleep.
560
561	  For emulation under QEMU, definitely say Y here, as we have other
562	  mechanisms for measuring time than the cycle counter.
563
564	  For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
565	  MILO, sleep mode is not supported so you might as well say N here.
566
567	  For SMP systems we cannot use the cycle counter for timing anyway,
568	  so you might as well say Y here.
569
570	  If unsure, say N.
571
572# LARGE_VMALLOC is racy, if you *really* need it then fix it first
573config ALPHA_LARGE_VMALLOC
574	bool
575	help
576	  Process creation and other aspects of virtual memory management can
577	  be streamlined if we restrict the kernel to one PGD for all vmalloc
578	  allocations.  This equates to about 8GB.
579
580	  Under normal circumstances, this is so far and above what is needed
581	  as to be laughable.  However, there are certain applications (such
582	  as benchmark-grade in-kernel web serving) that can make use of as
583	  much vmalloc space as is available.
584
585	  Say N unless you know you need gobs and gobs of vmalloc space.
586
587config VERBOSE_MCHECK
588	bool "Verbose Machine Checks"
589
590config VERBOSE_MCHECK_ON
591	int "Verbose Printing Mode (0=off, 1=on, 2=all)"
592	depends on VERBOSE_MCHECK
593	default 1
594	help
595	  This option allows the default printing mode to be set, and then
596	  possibly overridden by a boot command argument.
597
598	  For example, if one wanted the option of printing verbose
599	  machine checks, but wanted the default to be as if verbose
600	  machine check printing was turned off, then one would choose
601	  the printing mode to be 0. Then, upon reboot, one could add
602	  the boot command line "verbose_mcheck=1" to get the normal
603	  verbose machine check printing, or "verbose_mcheck=2" to get
604	  the maximum information available.
605
606	  Take the default (1) unless you want more control or more info.
607
608choice
609	prompt "Timer interrupt frequency (HZ)?"
610	default HZ_128 if ALPHA_QEMU
611	default HZ_1200 if ALPHA_RAWHIDE
612	default HZ_1024
613	help
614	  The frequency at which timer interrupts occur.  A high frequency
615	  minimizes latency, whereas a low frequency minimizes overhead of
616	  process accounting.  The later effect is especially significant
617	  when being run under QEMU.
618
619	  Note that some Alpha hardware cannot change the interrupt frequency
620	  of the timer.  If unsure, say 1024 (or 1200 for Rawhide).
621
622	config HZ_32
623		bool "32 Hz"
624	config HZ_64
625		bool "64 Hz"
626	config HZ_128
627		bool "128 Hz"
628	config HZ_256
629		bool "256 Hz"
630	config HZ_1024
631		bool "1024 Hz"
632	config HZ_1200
633		bool "1200 Hz"
634endchoice
635
636config HZ
637	int
638	default 32 if HZ_32
639	default 64 if HZ_64
640	default 128 if HZ_128
641	default 256 if HZ_256
642	default 1200 if HZ_1200
643	default 1024
644
645config SRM_ENV
646	tristate "SRM environment through procfs"
647	depends on PROC_FS
648	help
649	  If you enable this option, a subdirectory inside /proc called
650	  /proc/srm_environment will give you access to the all important
651	  SRM environment variables (those which have a name) and also
652	  to all others (by their internal number).
653
654	  SRM is something like a BIOS for Alpha machines. There are some
655	  other such BIOSes, like AlphaBIOS, which this driver cannot
656	  support (hey, that's not SRM!).
657
658	  Despite the fact that this driver doesn't work on all Alphas (but
659	  only on those which have SRM as their firmware), it's save to
660	  build it even if your particular machine doesn't know about SRM
661	  (or if you intend to compile a generic kernel). It will simply
662	  not create those subdirectory in /proc (and give you some warning,
663	  of course).
664
665	  This driver is also available as a module and will be called
666	  srm_env then.
667
668endmenu
669
670# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
671# but we also need it if VGA_HOSE is set
672config DUMMY_CONSOLE
673	bool
674	depends on VGA_HOSE
675	default y
676