xref: /openbmc/linux/arch/alpha/Kconfig (revision 37744fee)
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 FORCE_PCI if !ALPHA_JENSEN
11	select PCI_DOMAINS if PCI
12	select PCI_SYSCALL if PCI
13	select HAVE_AOUT
14	select HAVE_ASM_MODVERSIONS
15	select HAVE_IDE
16	select HAVE_OPROFILE
17	select HAVE_PCSPKR_PLATFORM
18	select HAVE_PERF_EVENTS
19	select NEED_DMA_MAP_STATE
20	select NEED_SG_DMA_LENGTH
21	select VIRT_TO_BUS
22	select GENERIC_IRQ_PROBE
23	select GENERIC_PCI_IOMAP if PCI
24	select AUTO_IRQ_AFFINITY if SMP
25	select GENERIC_IRQ_SHOW
26	select ARCH_WANT_IPC_PARSE_VERSION
27	select ARCH_HAVE_NMI_SAFE_CMPXCHG
28	select AUDIT_ARCH
29	select GENERIC_CLOCKEVENTS
30	select GENERIC_CPU_VULNERABILITIES
31	select GENERIC_SMP_IDLE_THREAD
32	select GENERIC_STRNCPY_FROM_USER
33	select GENERIC_STRNLEN_USER
34	select HAVE_ARCH_AUDITSYSCALL
35	select HAVE_MOD_ARCH_SPECIFIC
36	select MODULES_USE_ELF_RELA
37	select ODD_RT_SIGACTION
38	select OLD_SIGSUSPEND
39	select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
40	select MMU_GATHER_NO_RANGE
41	help
42	  The Alpha is a 64-bit general-purpose processor designed and
43	  marketed by the Digital Equipment Corporation of blessed memory,
44	  now Hewlett-Packard.  The Alpha Linux project has a home page at
45	  <http://www.alphalinux.org/>.
46
47config 64BIT
48	def_bool y
49
50config MMU
51	bool
52	default y
53
54config ARCH_HAS_ILOG2_U32
55	bool
56	default n
57
58config ARCH_HAS_ILOG2_U64
59	bool
60	default n
61
62config GENERIC_CALIBRATE_DELAY
63	bool
64	default y
65
66config ZONE_DMA
67	bool
68	default y
69
70config GENERIC_ISA_DMA
71	bool
72	default y
73
74config PGTABLE_LEVELS
75	int
76	default 3
77
78config AUDIT_ARCH
79	bool
80
81menu "System setup"
82
83choice
84	prompt "Alpha system type"
85	default ALPHA_GENERIC
86	---help---
87	  This is the system type of your hardware.  A "generic" kernel will
88	  run on any supported Alpha system. However, if you configure a
89	  kernel for your specific system, it will be faster and smaller.
90
91	  To find out what type of Alpha system you have, you may want to
92	  check out the Linux/Alpha FAQ, accessible on the WWW from
93	  <http://www.alphalinux.org/>. In summary:
94
95	  Alcor/Alpha-XLT     AS 600, AS 500, XL-300, XL-366
96	  Alpha-XL            XL-233, XL-266
97	  AlphaBook1          Alpha laptop
98	  Avanti              AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
99	  Cabriolet           AlphaPC64, AlphaPCI64
100	  DP264               DP264 / DS20 / ES40 / DS10 / DS10L
101	  EB164               EB164 21164 evaluation board
102	  EB64+               EB64+ 21064 evaluation board
103	  EB66                EB66 21066 evaluation board
104	  EB66+               EB66+ 21066 evaluation board
105	  Jensen              DECpc 150, DEC 2000 models 300, 500
106	  LX164               AlphaPC164-LX
107	  Lynx                AS 2100A
108	  Miata               Personal Workstation 433/500/600 a/au
109	  Marvel              AlphaServer ES47 / ES80 / GS1280
110	  Mikasa              AS 1000
111	  Noname              AXPpci33, UDB (Multia)
112	  Noritake            AS 1000A, AS 600A, AS 800
113	  PC164               AlphaPC164
114	  Rawhide             AS 1200, AS 4000, AS 4100
115	  Ruffian             RPX164-2, AlphaPC164-UX, AlphaPC164-BX
116	  SX164               AlphaPC164-SX
117	  Sable               AS 2000, AS 2100
118	  Shark               DS 20L
119	  Takara              Takara (OEM)
120	  Titan               AlphaServer ES45 / DS25 / DS15
121	  Wildfire            AlphaServer GS 40/80/160/320
122
123	  If you don't know what to do, choose "generic".
124
125config ALPHA_GENERIC
126	bool "Generic"
127	depends on TTY
128	select HAVE_EISA
129	help
130	  A generic kernel will run on all supported Alpha hardware.
131
132config ALPHA_ALCOR
133	bool "Alcor/Alpha-XLT"
134	select HAVE_EISA
135	help
136	  For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
137	  slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
138	  Address, CIA) - a 383 pin plastic PGA).  It provides a DRAM
139	  controller (256-bit memory bus) and a PCI interface.  It also does
140	  all the work required to support an external Bcache and to maintain
141	  memory coherence when a PCI device DMAs into (or out of) memory.
142
143config ALPHA_XL
144	bool "Alpha-XL"
145	help
146	  XL-233 and XL-266-based Alpha systems.
147
148config ALPHA_BOOK1
149	bool "AlphaBook1"
150	help
151	  Dec AlphaBook1/Burns Alpha-based laptops.
152
153config ALPHA_AVANTI_CH
154	bool "Avanti"
155
156config ALPHA_CABRIOLET
157	bool "Cabriolet"
158	help
159	  Cabriolet AlphaPC64, AlphaPCI64 systems.  Derived from EB64+ but now
160	  baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
161	  slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
162	  Bcache SIMMs.  Requires power supply with 3.3V output.
163
164config ALPHA_DP264
165	bool "DP264"
166	help
167	  Various 21264 systems with the tsunami core logic chipset.
168	  API Networks: 264DP, UP2000(+), CS20;
169	  Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
170
171config ALPHA_EB164
172	bool "EB164"
173	help
174	  EB164 21164 evaluation board from DEC.  Uses 21164 and ALCOR.  Has
175	  ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
176	  shared with an ISA slot) and 2 32-bit PCI slots.  Uses plus-in
177	  Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
178	  MOUSE (PS2 style), RTC/NVRAM.  Boot ROM is Flash.  PC-AT-sized
179	  motherboard.  Requires power supply with 3.3V output.
180
181config ALPHA_EB64P_CH
182	bool "EB64+"
183
184config ALPHA_EB66
185	bool "EB66"
186	help
187	  A Digital DS group board.  Uses 21066 or 21066A.  I/O sub-system is
188	  identical to EB64+.  Baby PC-AT size.  Runs from standard PC power
189	  supply.  The EB66 schematic was published as a marketing poster
190	  advertising the 21066 as "the first microprocessor in the world with
191	  embedded PCI".
192
193config ALPHA_EB66P
194	bool "EB66+"
195	help
196	  Later variant of the EB66 board.
197
198config ALPHA_EIGER
199	bool "Eiger"
200	help
201	  Apparently an obscure OEM single-board computer based on the
202	  Typhoon/Tsunami chipset family. Information on it is scanty.
203
204config ALPHA_JENSEN
205	bool "Jensen"
206	depends on BROKEN
207	select HAVE_EISA
208	help
209	  DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
210	  of the first-generation Alpha systems. A number of these systems
211	  seem to be available on the second- hand market. The Jensen is a
212	  floor-standing tower system which originally used a 150MHz 21064 It
213	  used programmable logic to interface a 486 EISA I/O bridge to the
214	  CPU.
215
216config ALPHA_LX164
217	bool "LX164"
218	help
219	  A technical overview of this board is available at
220	  <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
221
222config ALPHA_LYNX
223	bool "Lynx"
224	select HAVE_EISA
225	help
226	  AlphaServer 2100A-based systems.
227
228config ALPHA_MARVEL
229	bool "Marvel"
230	help
231	  AlphaServer ES47 / ES80 / GS1280 based on EV7.
232
233config ALPHA_MIATA
234	bool "Miata"
235	select HAVE_EISA
236	help
237	  The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
238	  or 600au).
239
240config ALPHA_MIKASA
241	bool "Mikasa"
242	help
243	  AlphaServer 1000-based Alpha systems.
244
245config ALPHA_NAUTILUS
246	bool "Nautilus"
247	help
248	  Alpha systems based on the AMD 751 & ALI 1543C chipsets.
249
250config ALPHA_NONAME_CH
251	bool "Noname"
252
253config ALPHA_NORITAKE
254	bool "Noritake"
255	select HAVE_EISA
256	help
257	  AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
258	  systems.
259
260config ALPHA_PC164
261	bool "PC164"
262
263config ALPHA_P2K
264	bool "Platform2000"
265
266config ALPHA_RAWHIDE
267	bool "Rawhide"
268	select HAVE_EISA
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	select HAVE_EISA
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 ALPHA_NONAME
330	bool
331	depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
332	default y
333	help
334	  The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
335	  UDB).  This design was produced by Digital's Technical OEM (TOEM)
336	  group. It uses the 21066 processor running at 166MHz or 233MHz. It
337	  is a baby-AT size, and runs from a standard PC power supply. It has
338	  5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
339	  2 versions, with either PS/2 or large DIN connectors for the
340	  keyboard.
341
342config ALPHA_EV4
343	bool
344	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
345	default y if !ALPHA_LYNX
346
347config ALPHA_LCA
348	bool
349	depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
350	default y
351
352config ALPHA_APECS
353	bool
354	depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
355	default y
356
357config ALPHA_EB64P
358	bool
359	depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
360	default y
361	help
362	  Uses 21064 or 21064A and APECs.  Has ISA and PCI expansion (3 ISA,
363	  2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
364	  ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
365	  (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
366	  SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM.  PC-AT size.
367	  Runs from standard PC power supply.
368
369config ALPHA_EV5
370	bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
371	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
372
373config ALPHA_EV4
374	bool
375	default y if ALPHA_LYNX && !ALPHA_EV5
376
377config ALPHA_CIA
378	bool
379	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
380	default y
381
382config ALPHA_EV56
383	bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
384	default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
385
386config ALPHA_EV56
387	prompt "EV56 CPU (speed >= 333MHz)?"
388	depends on ALPHA_NORITAKE || ALPHA_PRIMO
389
390config ALPHA_EV56
391	prompt "EV56 CPU (speed >= 400MHz)?"
392	depends on ALPHA_RAWHIDE
393
394config ALPHA_PRIMO
395	bool "EV5 CPU daughtercard (model 5/xxx)?"
396	depends on ALPHA_NORITAKE || ALPHA_MIKASA
397	help
398	  Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
399
400config ALPHA_GAMMA
401	bool "EV5 CPU(s) (model 5/xxx)?"
402	depends on ALPHA_SABLE
403	help
404	  Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
405
406config ALPHA_GAMMA
407	bool
408	depends on ALPHA_LYNX
409	default y
410
411config ALPHA_T2
412	bool
413	depends on ALPHA_SABLE || ALPHA_LYNX
414	default y
415
416config ALPHA_PYXIS
417	bool
418	depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
419	default y
420
421config ALPHA_EV6
422	bool
423	depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
424	default y
425
426config ALPHA_TSUNAMI
427	bool
428	depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
429	default y
430
431config ALPHA_EV67
432	bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
433	default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
434	help
435	  Is this a machine based on the EV67 core?  If in doubt, select N here
436	  and the machine will be treated as an EV6.
437
438config ALPHA_MCPCIA
439	bool
440	depends on ALPHA_RAWHIDE
441	default y
442
443config ALPHA_POLARIS
444	bool
445	depends on ALPHA_RX164
446	default y
447
448config ALPHA_IRONGATE
449	bool
450	depends on ALPHA_NAUTILUS
451	default y
452
453config GENERIC_HWEIGHT
454	bool
455	default y if !ALPHA_EV67
456
457config ALPHA_AVANTI
458	bool
459	depends on ALPHA_XL || ALPHA_AVANTI_CH
460	default y
461	help
462	  Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
463	  Alphas. Info at
464	  <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
465
466config ALPHA_BROKEN_IRQ_MASK
467	bool
468	depends on ALPHA_GENERIC || ALPHA_PC164
469	default y
470
471config VGA_HOSE
472	bool
473	depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
474	default y
475	help
476	  Support VGA on an arbitrary hose; needed for several platforms
477	  which always have multiple hoses, and whose consoles support it.
478
479
480config ALPHA_QEMU
481	bool "Run under QEMU emulation"
482	depends on !ALPHA_GENERIC
483	---help---
484	  Assume the presence of special features supported by QEMU PALcode
485	  that reduce the overhead of system emulation.
486
487	  Generic kernels will auto-detect QEMU.  But when building a
488	  system-specific kernel, the assumption is that we want to
489	  eliminate as many runtime tests as possible.
490
491	  If unsure, say N.
492
493
494config ALPHA_SRM
495	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
496	depends on TTY
497	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
498	---help---
499	  There are two different types of booting firmware on Alphas: SRM,
500	  which is command line driven, and ARC, which uses menus and arrow
501	  keys. Details about the Linux/Alpha booting process are contained in
502	  the Linux/Alpha FAQ, accessible on the WWW from
503	  <http://www.alphalinux.org/>.
504
505	  The usual way to load Linux on an Alpha machine is to use MILO
506	  (a bootloader that lets you pass command line parameters to the
507	  kernel just like lilo does for the x86 architecture) which can be
508	  loaded either from ARC or can be installed directly as a permanent
509	  firmware replacement from floppy (which requires changing a certain
510	  jumper on the motherboard). If you want to do either of these, say N
511	  here. If MILO doesn't work on your system (true for Jensen
512	  motherboards), you can bypass it altogether and boot Linux directly
513	  from an SRM console; say Y here in order to do that. Note that you
514	  won't be able to boot from an IDE disk using SRM.
515
516	  If unsure, say N.
517
518config ARCH_MAY_HAVE_PC_FDC
519	def_bool y
520
521config SMP
522	bool "Symmetric multi-processing support"
523	depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
524	---help---
525	  This enables support for systems with more than one CPU. If you have
526	  a system with only one CPU, say N. If you have a system with more
527	  than one CPU, say Y.
528
529	  If you say N here, the kernel will run on uni- and multiprocessor
530	  machines, but will use only one CPU of a multiprocessor machine. If
531	  you say Y here, the kernel will run on many, but not all,
532	  uniprocessor machines. On a uniprocessor machine, the kernel
533	  will run faster if you say N here.
534
535	  See also the SMP-HOWTO available at
536	  <http://www.tldp.org/docs.html#howto>.
537
538	  If you don't know what to do here, say N.
539
540config NR_CPUS
541	int "Maximum number of CPUs (2-32)"
542	range 2 32
543	depends on SMP
544	default "32" if ALPHA_GENERIC || ALPHA_MARVEL
545	default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
546	help
547	  MARVEL support can handle a maximum of 32 CPUs, all the others
548          with working support have a maximum of 4 CPUs.
549
550config ARCH_DISCONTIGMEM_ENABLE
551	bool "Discontiguous Memory Support"
552	help
553	  Say Y to support efficient handling of discontiguous physical memory,
554	  for architectures which are either NUMA (Non-Uniform Memory Access)
555	  or have huge holes in the physical address space for other reasons.
556	  See <file:Documentation/vm/numa.rst> for more.
557
558config NUMA
559	bool "NUMA Support (EXPERIMENTAL)"
560	depends on DISCONTIGMEM && BROKEN
561	help
562	  Say Y to compile the kernel to support NUMA (Non-Uniform Memory
563	  Access).  This option is for configuring high-end multiprocessor
564	  server machines.  If in doubt, say N.
565
566config ALPHA_WTINT
567	bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
568	default y if ALPHA_QEMU
569	default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
570	default n if !ALPHA_SRM && !ALPHA_GENERIC
571	default y if SMP
572	---help---
573	  The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
574	  to sleep until the next interrupt.  This may reduce the power
575	  consumed, and the heat produced by the computer.  However, it has
576	  the side effect of making the cycle counter unreliable as a timing
577	  device across the sleep.
578
579	  For emulation under QEMU, definitely say Y here, as we have other
580	  mechanisms for measuring time than the cycle counter.
581
582	  For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
583	  MILO, sleep mode is not supported so you might as well say N here.
584
585	  For SMP systems we cannot use the cycle counter for timing anyway,
586	  so you might as well say Y here.
587
588	  If unsure, say N.
589
590config NODES_SHIFT
591	int
592	default "7"
593	depends on NEED_MULTIPLE_NODES
594
595# LARGE_VMALLOC is racy, if you *really* need it then fix it first
596config ALPHA_LARGE_VMALLOC
597	bool
598	---help---
599	  Process creation and other aspects of virtual memory management can
600	  be streamlined if we restrict the kernel to one PGD for all vmalloc
601	  allocations.  This equates to about 8GB.
602
603	  Under normal circumstances, this is so far and above what is needed
604	  as to be laughable.  However, there are certain applications (such
605	  as benchmark-grade in-kernel web serving) that can make use of as
606	  much vmalloc space as is available.
607
608	  Say N unless you know you need gobs and gobs of vmalloc space.
609
610config VERBOSE_MCHECK
611	bool "Verbose Machine Checks"
612
613config VERBOSE_MCHECK_ON
614	int "Verbose Printing Mode (0=off, 1=on, 2=all)"
615	depends on VERBOSE_MCHECK
616	default 1
617	---help---
618	  This option allows the default printing mode to be set, and then
619	  possibly overridden by a boot command argument.
620
621	  For example, if one wanted the option of printing verbose
622	  machine checks, but wanted the default to be as if verbose
623	  machine check printing was turned off, then one would choose
624	  the printing mode to be 0. Then, upon reboot, one could add
625	  the boot command line "verbose_mcheck=1" to get the normal
626	  verbose machine check printing, or "verbose_mcheck=2" to get
627	  the maximum information available.
628
629	  Take the default (1) unless you want more control or more info.
630
631choice
632	prompt "Timer interrupt frequency (HZ)?"
633	default HZ_128 if ALPHA_QEMU
634	default HZ_1200 if ALPHA_RAWHIDE
635	default HZ_1024
636	---help---
637	  The frequency at which timer interrupts occur.  A high frequency
638	  minimizes latency, whereas a low frequency minimizes overhead of
639	  process accounting.  The later effect is especially significant
640	  when being run under QEMU.
641
642	  Note that some Alpha hardware cannot change the interrupt frequency
643	  of the timer.  If unsure, say 1024 (or 1200 for Rawhide).
644
645	config HZ_32
646		bool "32 Hz"
647	config HZ_64
648		bool "64 Hz"
649	config HZ_128
650		bool "128 Hz"
651	config HZ_256
652		bool "256 Hz"
653	config HZ_1024
654		bool "1024 Hz"
655	config HZ_1200
656		bool "1200 Hz"
657endchoice
658
659config HZ
660	int
661	default 32 if HZ_32
662	default 64 if HZ_64
663	default 128 if HZ_128
664	default 256 if HZ_256
665	default 1200 if HZ_1200
666	default 1024
667
668config SRM_ENV
669	tristate "SRM environment through procfs"
670	depends on PROC_FS
671	---help---
672	  If you enable this option, a subdirectory inside /proc called
673	  /proc/srm_environment will give you access to the all important
674	  SRM environment variables (those which have a name) and also
675	  to all others (by their internal number).
676
677	  SRM is something like a BIOS for Alpha machines. There are some
678	  other such BIOSes, like AlphaBIOS, which this driver cannot
679	  support (hey, that's not SRM!).
680
681	  Despite the fact that this driver doesn't work on all Alphas (but
682	  only on those which have SRM as their firmware), it's save to
683	  build it even if your particular machine doesn't know about SRM
684	  (or if you intend to compile a generic kernel). It will simply
685	  not create those subdirectory in /proc (and give you some warning,
686	  of course).
687
688	  This driver is also available as a module and will be called
689	  srm_env then.
690
691endmenu
692
693# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
694# but we also need it if VGA_HOSE is set
695config DUMMY_CONSOLE
696	bool
697	depends on VGA_HOSE
698	default y
699