xref: /openbmc/linux/arch/alpha/Kconfig (revision 33fb626b)
1# SPDX-License-Identifier: GPL-2.0
2config ALPHA
3	bool
4	default y
5	select ARCH_MIGHT_HAVE_PC_PARPORT
6	select ARCH_MIGHT_HAVE_PC_SERIO
7	select ARCH_NO_PREEMPT
8	select ARCH_NO_SG_CHAIN
9	select ARCH_USE_CMPXCHG_LOCKREF
10	select DMA_OPS if PCI
11	select FORCE_PCI if !ALPHA_JENSEN
12	select PCI_DOMAINS if PCI
13	select PCI_SYSCALL if PCI
14	select HAVE_AOUT
15	select HAVE_ASM_MODVERSIONS
16	select HAVE_IDE
17	select HAVE_OPROFILE
18	select HAVE_PCSPKR_PLATFORM
19	select HAVE_PERF_EVENTS
20	select NEED_DMA_MAP_STATE
21	select NEED_SG_DMA_LENGTH
22	select VIRT_TO_BUS
23	select GENERIC_IRQ_PROBE
24	select GENERIC_PCI_IOMAP if PCI
25	select AUTO_IRQ_AFFINITY if SMP
26	select GENERIC_IRQ_SHOW
27	select ARCH_WANT_IPC_PARSE_VERSION
28	select ARCH_HAVE_NMI_SAFE_CMPXCHG
29	select AUDIT_ARCH
30	select GENERIC_CLOCKEVENTS
31	select GENERIC_CPU_VULNERABILITIES
32	select GENERIC_SMP_IDLE_THREAD
33	select GENERIC_STRNCPY_FROM_USER
34	select GENERIC_STRNLEN_USER
35	select HAVE_ARCH_AUDITSYSCALL
36	select HAVE_MOD_ARCH_SPECIFIC
37	select MODULES_USE_ELF_RELA
38	select ODD_RT_SIGACTION
39	select OLD_SIGSUSPEND
40	select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
41	select MMU_GATHER_NO_RANGE
42	select SET_FS
43	select SPARSEMEM_EXTREME if SPARSEMEM
44	help
45	  The Alpha is a 64-bit general-purpose processor designed and
46	  marketed by the Digital Equipment Corporation of blessed memory,
47	  now Hewlett-Packard.  The Alpha Linux project has a home page at
48	  <http://www.alphalinux.org/>.
49
50config 64BIT
51	def_bool y
52
53config MMU
54	bool
55	default y
56
57config ARCH_HAS_ILOG2_U32
58	bool
59	default n
60
61config ARCH_HAS_ILOG2_U64
62	bool
63	default n
64
65config GENERIC_CALIBRATE_DELAY
66	bool
67	default y
68
69config ZONE_DMA
70	bool
71	default y
72
73config GENERIC_ISA_DMA
74	bool
75	default y
76
77config PGTABLE_LEVELS
78	int
79	default 3
80
81config AUDIT_ARCH
82	bool
83
84menu "System setup"
85
86choice
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
128config ALPHA_GENERIC
129	bool "Generic"
130	depends on TTY
131	select HAVE_EISA
132	help
133	  A generic kernel will run on all supported Alpha hardware.
134
135config ALPHA_ALCOR
136	bool "Alcor/Alpha-XLT"
137	select HAVE_EISA
138	help
139	  For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
140	  slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
141	  Address, CIA) - a 383 pin plastic PGA).  It provides a DRAM
142	  controller (256-bit memory bus) and a PCI interface.  It also does
143	  all the work required to support an external Bcache and to maintain
144	  memory coherence when a PCI device DMAs into (or out of) memory.
145
146config ALPHA_XL
147	bool "Alpha-XL"
148	help
149	  XL-233 and XL-266-based Alpha systems.
150
151config ALPHA_BOOK1
152	bool "AlphaBook1"
153	help
154	  Dec AlphaBook1/Burns Alpha-based laptops.
155
156config ALPHA_AVANTI_CH
157	bool "Avanti"
158
159config ALPHA_CABRIOLET
160	bool "Cabriolet"
161	help
162	  Cabriolet AlphaPC64, AlphaPCI64 systems.  Derived from EB64+ but now
163	  baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
164	  slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
165	  Bcache SIMMs.  Requires power supply with 3.3V output.
166
167config ALPHA_DP264
168	bool "DP264"
169	help
170	  Various 21264 systems with the tsunami core logic chipset.
171	  API Networks: 264DP, UP2000(+), CS20;
172	  Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
173
174config ALPHA_EB164
175	bool "EB164"
176	help
177	  EB164 21164 evaluation board from DEC.  Uses 21164 and ALCOR.  Has
178	  ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
179	  shared with an ISA slot) and 2 32-bit PCI slots.  Uses plus-in
180	  Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
181	  MOUSE (PS2 style), RTC/NVRAM.  Boot ROM is Flash.  PC-AT-sized
182	  motherboard.  Requires power supply with 3.3V output.
183
184config ALPHA_EB64P_CH
185	bool "EB64+"
186
187config ALPHA_EB66
188	bool "EB66"
189	help
190	  A Digital DS group board.  Uses 21066 or 21066A.  I/O sub-system is
191	  identical to EB64+.  Baby PC-AT size.  Runs from standard PC power
192	  supply.  The EB66 schematic was published as a marketing poster
193	  advertising the 21066 as "the first microprocessor in the world with
194	  embedded PCI".
195
196config ALPHA_EB66P
197	bool "EB66+"
198	help
199	  Later variant of the EB66 board.
200
201config ALPHA_EIGER
202	bool "Eiger"
203	help
204	  Apparently an obscure OEM single-board computer based on the
205	  Typhoon/Tsunami chipset family. Information on it is scanty.
206
207config ALPHA_JENSEN
208	bool "Jensen"
209	depends on BROKEN
210	select HAVE_EISA
211	help
212	  DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
213	  of the first-generation Alpha systems. A number of these systems
214	  seem to be available on the second- hand market. The Jensen is a
215	  floor-standing tower system which originally used a 150MHz 21064 It
216	  used programmable logic to interface a 486 EISA I/O bridge to the
217	  CPU.
218
219config ALPHA_LX164
220	bool "LX164"
221	help
222	  A technical overview of this board is available at
223	  <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
224
225config ALPHA_LYNX
226	bool "Lynx"
227	select HAVE_EISA
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	select HAVE_EISA
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	select HAVE_EISA
259	help
260	  AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
261	  systems.
262
263config ALPHA_PC164
264	bool "PC164"
265
266config ALPHA_P2K
267	bool "Platform2000"
268
269config ALPHA_RAWHIDE
270	bool "Rawhide"
271	select HAVE_EISA
272	help
273	  AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
274	  See HOWTO at
275	  <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
276
277config ALPHA_RUFFIAN
278	bool "Ruffian"
279	help
280	  Samsung APC164UX.  There is a page on known problems and workarounds
281	  at <http://www.alphalinux.org/faq/FAQ-11.html>.
282
283config ALPHA_RX164
284	bool "RX164"
285
286config ALPHA_SX164
287	bool "SX164"
288
289config ALPHA_SABLE
290	bool "Sable"
291	select HAVE_EISA
292	help
293	  Digital AlphaServer 2000 and 2100-based systems.
294
295config ALPHA_SHARK
296	bool "Shark"
297
298config ALPHA_TAKARA
299	bool "Takara"
300	help
301	  Alpha 11164-based OEM single-board computer.
302
303config ALPHA_TITAN
304	bool "Titan"
305	help
306	  AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
307
308config ALPHA_WILDFIRE
309	bool "Wildfire"
310	help
311	  AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
312
313endchoice
314
315# clear all implied options (don't want default values for those):
316# Most of these machines have ISA slots; not exactly sure which don't,
317# and this doesn't activate hordes of code, so do it always.
318config ISA
319	bool
320	default y
321	help
322	  Find out whether you have ISA slots on your motherboard.  ISA is the
323	  name of a bus system, i.e. the way the CPU talks to the other stuff
324	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
325	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
326	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
327
328config ISA_DMA_API
329	bool
330	default y
331
332config ALPHA_NONAME
333	bool
334	depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
335	default y
336	help
337	  The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
338	  UDB).  This design was produced by Digital's Technical OEM (TOEM)
339	  group. It uses the 21066 processor running at 166MHz or 233MHz. It
340	  is a baby-AT size, and runs from a standard PC power supply. It has
341	  5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
342	  2 versions, with either PS/2 or large DIN connectors for the
343	  keyboard.
344
345config ALPHA_EV4
346	bool
347	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
348	default y if !ALPHA_LYNX
349
350config ALPHA_LCA
351	bool
352	depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
353	default y
354
355config ALPHA_APECS
356	bool
357	depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
358	default y
359
360config ALPHA_EB64P
361	bool
362	depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
363	default y
364	help
365	  Uses 21064 or 21064A and APECs.  Has ISA and PCI expansion (3 ISA,
366	  2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
367	  ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
368	  (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
369	  SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM.  PC-AT size.
370	  Runs from standard PC power supply.
371
372config ALPHA_EV5
373	bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
374	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
375
376config ALPHA_EV4
377	bool
378	default y if ALPHA_LYNX && !ALPHA_EV5
379
380config ALPHA_CIA
381	bool
382	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
383	default y
384
385config ALPHA_EV56
386	bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
387	default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
388
389config ALPHA_EV56
390	prompt "EV56 CPU (speed >= 333MHz)?"
391	depends on ALPHA_NORITAKE || ALPHA_PRIMO
392
393config ALPHA_EV56
394	prompt "EV56 CPU (speed >= 400MHz)?"
395	depends on ALPHA_RAWHIDE
396
397config ALPHA_PRIMO
398	bool "EV5 CPU daughtercard (model 5/xxx)?"
399	depends on ALPHA_NORITAKE || ALPHA_MIKASA
400	help
401	  Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
402
403config ALPHA_GAMMA
404	bool "EV5 CPU(s) (model 5/xxx)?"
405	depends on ALPHA_SABLE
406	help
407	  Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
408
409config ALPHA_GAMMA
410	bool
411	depends on ALPHA_LYNX
412	default y
413
414config ALPHA_T2
415	bool
416	depends on ALPHA_SABLE || ALPHA_LYNX
417	default y
418
419config ALPHA_PYXIS
420	bool
421	depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
422	default y
423
424config ALPHA_EV6
425	bool
426	depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
427	default y
428
429config ALPHA_TSUNAMI
430	bool
431	depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
432	default y
433
434config ALPHA_EV67
435	bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
436	default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
437	help
438	  Is this a machine based on the EV67 core?  If in doubt, select N here
439	  and the machine will be treated as an EV6.
440
441config ALPHA_MCPCIA
442	bool
443	depends on ALPHA_RAWHIDE
444	default y
445
446config ALPHA_POLARIS
447	bool
448	depends on ALPHA_RX164
449	default y
450
451config ALPHA_IRONGATE
452	bool
453	depends on ALPHA_NAUTILUS
454	default y
455
456config GENERIC_HWEIGHT
457	bool
458	default y if !ALPHA_EV67
459
460config ALPHA_AVANTI
461	bool
462	depends on ALPHA_XL || ALPHA_AVANTI_CH
463	default y
464	help
465	  Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
466	  Alphas. Info at
467	  <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
468
469config ALPHA_BROKEN_IRQ_MASK
470	bool
471	depends on ALPHA_GENERIC || ALPHA_PC164
472	default y
473
474config VGA_HOSE
475	bool
476	depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
477	default y
478	help
479	  Support VGA on an arbitrary hose; needed for several platforms
480	  which always have multiple hoses, and whose consoles support it.
481
482
483config ALPHA_QEMU
484	bool "Run under QEMU emulation"
485	depends on !ALPHA_GENERIC
486	help
487	  Assume the presence of special features supported by QEMU PALcode
488	  that reduce the overhead of system emulation.
489
490	  Generic kernels will auto-detect QEMU.  But when building a
491	  system-specific kernel, the assumption is that we want to
492	  eliminate as many runtime tests as possible.
493
494	  If unsure, say N.
495
496
497config ALPHA_SRM
498	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
499	depends on TTY
500	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
501	help
502	  There are two different types of booting firmware on Alphas: SRM,
503	  which is command line driven, and ARC, which uses menus and arrow
504	  keys. Details about the Linux/Alpha booting process are contained in
505	  the Linux/Alpha FAQ, accessible on the WWW from
506	  <http://www.alphalinux.org/>.
507
508	  The usual way to load Linux on an Alpha machine is to use MILO
509	  (a bootloader that lets you pass command line parameters to the
510	  kernel just like lilo does for the x86 architecture) which can be
511	  loaded either from ARC or can be installed directly as a permanent
512	  firmware replacement from floppy (which requires changing a certain
513	  jumper on the motherboard). If you want to do either of these, say N
514	  here. If MILO doesn't work on your system (true for Jensen
515	  motherboards), you can bypass it altogether and boot Linux directly
516	  from an SRM console; say Y here in order to do that. Note that you
517	  won't be able to boot from an IDE disk using SRM.
518
519	  If unsure, say N.
520
521config ARCH_MAY_HAVE_PC_FDC
522	def_bool y
523
524config SMP
525	bool "Symmetric multi-processing support"
526	depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
527	help
528	  This enables support for systems with more than one CPU. If you have
529	  a system with only one CPU, say N. If you have a system with more
530	  than one CPU, say Y.
531
532	  If you say N here, the kernel will run on uni- and multiprocessor
533	  machines, but will use only one CPU of a multiprocessor machine. If
534	  you say Y here, the kernel will run on many, but not all,
535	  uniprocessor machines. On a uniprocessor machine, the kernel
536	  will run faster if you say N here.
537
538	  See also the SMP-HOWTO available at
539	  <http://www.tldp.org/docs.html#howto>.
540
541	  If you don't know what to do here, say N.
542
543config NR_CPUS
544	int "Maximum number of CPUs (2-32)"
545	range 2 32
546	depends on SMP
547	default "32" if ALPHA_GENERIC || ALPHA_MARVEL
548	default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
549	help
550	  MARVEL support can handle a maximum of 32 CPUs, all the others
551	  with working support have a maximum of 4 CPUs.
552
553config ARCH_DISCONTIGMEM_ENABLE
554	bool "Discontiguous Memory Support"
555	depends on BROKEN
556	help
557	  Say Y to support efficient handling of discontiguous physical memory,
558	  for architectures which are either NUMA (Non-Uniform Memory Access)
559	  or have huge holes in the physical address space for other reasons.
560	  See <file:Documentation/vm/numa.rst> for more.
561
562config ARCH_SPARSEMEM_ENABLE
563	bool "Sparse Memory Support"
564	help
565	  Say Y to support efficient handling of discontiguous physical memory,
566	  for systems that have huge holes in the physical address space.
567
568config NUMA
569	bool "NUMA Support (EXPERIMENTAL)"
570	depends on DISCONTIGMEM && BROKEN
571	help
572	  Say Y to compile the kernel to support NUMA (Non-Uniform Memory
573	  Access).  This option is for configuring high-end multiprocessor
574	  server machines.  If in doubt, say N.
575
576config ALPHA_WTINT
577	bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
578	default y if ALPHA_QEMU
579	default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
580	default n if !ALPHA_SRM && !ALPHA_GENERIC
581	default y if SMP
582	help
583	  The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
584	  to sleep until the next interrupt.  This may reduce the power
585	  consumed, and the heat produced by the computer.  However, it has
586	  the side effect of making the cycle counter unreliable as a timing
587	  device across the sleep.
588
589	  For emulation under QEMU, definitely say Y here, as we have other
590	  mechanisms for measuring time than the cycle counter.
591
592	  For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
593	  MILO, sleep mode is not supported so you might as well say N here.
594
595	  For SMP systems we cannot use the cycle counter for timing anyway,
596	  so you might as well say Y here.
597
598	  If unsure, say N.
599
600config NODES_SHIFT
601	int
602	default "7"
603	depends on NEED_MULTIPLE_NODES
604
605# LARGE_VMALLOC is racy, if you *really* need it then fix it first
606config ALPHA_LARGE_VMALLOC
607	bool
608	help
609	  Process creation and other aspects of virtual memory management can
610	  be streamlined if we restrict the kernel to one PGD for all vmalloc
611	  allocations.  This equates to about 8GB.
612
613	  Under normal circumstances, this is so far and above what is needed
614	  as to be laughable.  However, there are certain applications (such
615	  as benchmark-grade in-kernel web serving) that can make use of as
616	  much vmalloc space as is available.
617
618	  Say N unless you know you need gobs and gobs of vmalloc space.
619
620config VERBOSE_MCHECK
621	bool "Verbose Machine Checks"
622
623config VERBOSE_MCHECK_ON
624	int "Verbose Printing Mode (0=off, 1=on, 2=all)"
625	depends on VERBOSE_MCHECK
626	default 1
627	help
628	  This option allows the default printing mode to be set, and then
629	  possibly overridden by a boot command argument.
630
631	  For example, if one wanted the option of printing verbose
632	  machine checks, but wanted the default to be as if verbose
633	  machine check printing was turned off, then one would choose
634	  the printing mode to be 0. Then, upon reboot, one could add
635	  the boot command line "verbose_mcheck=1" to get the normal
636	  verbose machine check printing, or "verbose_mcheck=2" to get
637	  the maximum information available.
638
639	  Take the default (1) unless you want more control or more info.
640
641choice
642	prompt "Timer interrupt frequency (HZ)?"
643	default HZ_128 if ALPHA_QEMU
644	default HZ_1200 if ALPHA_RAWHIDE
645	default HZ_1024
646	help
647	  The frequency at which timer interrupts occur.  A high frequency
648	  minimizes latency, whereas a low frequency minimizes overhead of
649	  process accounting.  The later effect is especially significant
650	  when being run under QEMU.
651
652	  Note that some Alpha hardware cannot change the interrupt frequency
653	  of the timer.  If unsure, say 1024 (or 1200 for Rawhide).
654
655	config HZ_32
656		bool "32 Hz"
657	config HZ_64
658		bool "64 Hz"
659	config HZ_128
660		bool "128 Hz"
661	config HZ_256
662		bool "256 Hz"
663	config HZ_1024
664		bool "1024 Hz"
665	config HZ_1200
666		bool "1200 Hz"
667endchoice
668
669config HZ
670	int
671	default 32 if HZ_32
672	default 64 if HZ_64
673	default 128 if HZ_128
674	default 256 if HZ_256
675	default 1200 if HZ_1200
676	default 1024
677
678config SRM_ENV
679	tristate "SRM environment through procfs"
680	depends on PROC_FS
681	help
682	  If you enable this option, a subdirectory inside /proc called
683	  /proc/srm_environment will give you access to the all important
684	  SRM environment variables (those which have a name) and also
685	  to all others (by their internal number).
686
687	  SRM is something like a BIOS for Alpha machines. There are some
688	  other such BIOSes, like AlphaBIOS, which this driver cannot
689	  support (hey, that's not SRM!).
690
691	  Despite the fact that this driver doesn't work on all Alphas (but
692	  only on those which have SRM as their firmware), it's save to
693	  build it even if your particular machine doesn't know about SRM
694	  (or if you intend to compile a generic kernel). It will simply
695	  not create those subdirectory in /proc (and give you some warning,
696	  of course).
697
698	  This driver is also available as a module and will be called
699	  srm_env then.
700
701endmenu
702
703# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
704# but we also need it if VGA_HOSE is set
705config DUMMY_CONSOLE
706	bool
707	depends on VGA_HOSE
708	default y
709