xref: /openbmc/linux/arch/alpha/Kconfig (revision 3180b64a)
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	help
44	  The Alpha is a 64-bit general-purpose processor designed and
45	  marketed by the Digital Equipment Corporation of blessed memory,
46	  now Hewlett-Packard.  The Alpha Linux project has a home page at
47	  <http://www.alphalinux.org/>.
48
49config 64BIT
50	def_bool y
51
52config MMU
53	bool
54	default y
55
56config ARCH_HAS_ILOG2_U32
57	bool
58	default n
59
60config ARCH_HAS_ILOG2_U64
61	bool
62	default n
63
64config GENERIC_CALIBRATE_DELAY
65	bool
66	default y
67
68config ZONE_DMA
69	bool
70	default y
71
72config GENERIC_ISA_DMA
73	bool
74	default y
75
76config PGTABLE_LEVELS
77	int
78	default 3
79
80config AUDIT_ARCH
81	bool
82
83menu "System setup"
84
85choice
86	prompt "Alpha system type"
87	default ALPHA_GENERIC
88	help
89	  This is the system type of your hardware.  A "generic" kernel will
90	  run on any supported Alpha system. However, if you configure a
91	  kernel for your specific system, it will be faster and smaller.
92
93	  To find out what type of Alpha system you have, you may want to
94	  check out the Linux/Alpha FAQ, accessible on the WWW from
95	  <http://www.alphalinux.org/>. In summary:
96
97	  Alcor/Alpha-XLT     AS 600, AS 500, XL-300, XL-366
98	  Alpha-XL            XL-233, XL-266
99	  AlphaBook1          Alpha laptop
100	  Avanti              AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
101	  Cabriolet           AlphaPC64, AlphaPCI64
102	  DP264               DP264 / DS20 / ES40 / DS10 / DS10L
103	  EB164               EB164 21164 evaluation board
104	  EB64+               EB64+ 21064 evaluation board
105	  EB66                EB66 21066 evaluation board
106	  EB66+               EB66+ 21066 evaluation board
107	  Jensen              DECpc 150, DEC 2000 models 300, 500
108	  LX164               AlphaPC164-LX
109	  Lynx                AS 2100A
110	  Miata               Personal Workstation 433/500/600 a/au
111	  Marvel              AlphaServer ES47 / ES80 / GS1280
112	  Mikasa              AS 1000
113	  Noname              AXPpci33, UDB (Multia)
114	  Noritake            AS 1000A, AS 600A, AS 800
115	  PC164               AlphaPC164
116	  Rawhide             AS 1200, AS 4000, AS 4100
117	  Ruffian             RPX164-2, AlphaPC164-UX, AlphaPC164-BX
118	  SX164               AlphaPC164-SX
119	  Sable               AS 2000, AS 2100
120	  Shark               DS 20L
121	  Takara              Takara (OEM)
122	  Titan               AlphaServer ES45 / DS25 / DS15
123	  Wildfire            AlphaServer GS 40/80/160/320
124
125	  If you don't know what to do, choose "generic".
126
127config ALPHA_GENERIC
128	bool "Generic"
129	depends on TTY
130	select HAVE_EISA
131	help
132	  A generic kernel will run on all supported Alpha hardware.
133
134config ALPHA_ALCOR
135	bool "Alcor/Alpha-XLT"
136	select HAVE_EISA
137	help
138	  For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
139	  slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
140	  Address, CIA) - a 383 pin plastic PGA).  It provides a DRAM
141	  controller (256-bit memory bus) and a PCI interface.  It also does
142	  all the work required to support an external Bcache and to maintain
143	  memory coherence when a PCI device DMAs into (or out of) memory.
144
145config ALPHA_XL
146	bool "Alpha-XL"
147	help
148	  XL-233 and XL-266-based Alpha systems.
149
150config ALPHA_BOOK1
151	bool "AlphaBook1"
152	help
153	  Dec AlphaBook1/Burns Alpha-based laptops.
154
155config ALPHA_AVANTI_CH
156	bool "Avanti"
157
158config ALPHA_CABRIOLET
159	bool "Cabriolet"
160	help
161	  Cabriolet AlphaPC64, AlphaPCI64 systems.  Derived from EB64+ but now
162	  baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
163	  slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
164	  Bcache SIMMs.  Requires power supply with 3.3V output.
165
166config ALPHA_DP264
167	bool "DP264"
168	help
169	  Various 21264 systems with the tsunami core logic chipset.
170	  API Networks: 264DP, UP2000(+), CS20;
171	  Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
172
173config ALPHA_EB164
174	bool "EB164"
175	help
176	  EB164 21164 evaluation board from DEC.  Uses 21164 and ALCOR.  Has
177	  ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
178	  shared with an ISA slot) and 2 32-bit PCI slots.  Uses plus-in
179	  Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
180	  MOUSE (PS2 style), RTC/NVRAM.  Boot ROM is Flash.  PC-AT-sized
181	  motherboard.  Requires power supply with 3.3V output.
182
183config ALPHA_EB64P_CH
184	bool "EB64+"
185
186config ALPHA_EB66
187	bool "EB66"
188	help
189	  A Digital DS group board.  Uses 21066 or 21066A.  I/O sub-system is
190	  identical to EB64+.  Baby PC-AT size.  Runs from standard PC power
191	  supply.  The EB66 schematic was published as a marketing poster
192	  advertising the 21066 as "the first microprocessor in the world with
193	  embedded PCI".
194
195config ALPHA_EB66P
196	bool "EB66+"
197	help
198	  Later variant of the EB66 board.
199
200config ALPHA_EIGER
201	bool "Eiger"
202	help
203	  Apparently an obscure OEM single-board computer based on the
204	  Typhoon/Tsunami chipset family. Information on it is scanty.
205
206config ALPHA_JENSEN
207	bool "Jensen"
208	depends on BROKEN
209	select HAVE_EISA
210	help
211	  DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
212	  of the first-generation Alpha systems. A number of these systems
213	  seem to be available on the second- hand market. The Jensen is a
214	  floor-standing tower system which originally used a 150MHz 21064 It
215	  used programmable logic to interface a 486 EISA I/O bridge to the
216	  CPU.
217
218config ALPHA_LX164
219	bool "LX164"
220	help
221	  A technical overview of this board is available at
222	  <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
223
224config ALPHA_LYNX
225	bool "Lynx"
226	select HAVE_EISA
227	help
228	  AlphaServer 2100A-based systems.
229
230config ALPHA_MARVEL
231	bool "Marvel"
232	help
233	  AlphaServer ES47 / ES80 / GS1280 based on EV7.
234
235config ALPHA_MIATA
236	bool "Miata"
237	select HAVE_EISA
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	select HAVE_EISA
258	help
259	  AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
260	  systems.
261
262config ALPHA_PC164
263	bool "PC164"
264
265config ALPHA_P2K
266	bool "Platform2000"
267
268config ALPHA_RAWHIDE
269	bool "Rawhide"
270	select HAVE_EISA
271	help
272	  AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
273	  See HOWTO at
274	  <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
275
276config ALPHA_RUFFIAN
277	bool "Ruffian"
278	help
279	  Samsung APC164UX.  There is a page on known problems and workarounds
280	  at <http://www.alphalinux.org/faq/FAQ-11.html>.
281
282config ALPHA_RX164
283	bool "RX164"
284
285config ALPHA_SX164
286	bool "SX164"
287
288config ALPHA_SABLE
289	bool "Sable"
290	select HAVE_EISA
291	help
292	  Digital AlphaServer 2000 and 2100-based systems.
293
294config ALPHA_SHARK
295	bool "Shark"
296
297config ALPHA_TAKARA
298	bool "Takara"
299	help
300	  Alpha 11164-based OEM single-board computer.
301
302config ALPHA_TITAN
303	bool "Titan"
304	help
305	  AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
306
307config ALPHA_WILDFIRE
308	bool "Wildfire"
309	help
310	  AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
311
312endchoice
313
314# clear all implied options (don't want default values for those):
315# Most of these machines have ISA slots; not exactly sure which don't,
316# and this doesn't activate hordes of code, so do it always.
317config ISA
318	bool
319	default y
320	help
321	  Find out whether you have ISA slots on your motherboard.  ISA is the
322	  name of a bus system, i.e. the way the CPU talks to the other stuff
323	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
324	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
325	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
326
327config ISA_DMA_API
328	bool
329	default y
330
331config ALPHA_NONAME
332	bool
333	depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
334	default y
335	help
336	  The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
337	  UDB).  This design was produced by Digital's Technical OEM (TOEM)
338	  group. It uses the 21066 processor running at 166MHz or 233MHz. It
339	  is a baby-AT size, and runs from a standard PC power supply. It has
340	  5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
341	  2 versions, with either PS/2 or large DIN connectors for the
342	  keyboard.
343
344config ALPHA_EV4
345	bool
346	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
347	default y if !ALPHA_LYNX
348
349config ALPHA_LCA
350	bool
351	depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
352	default y
353
354config ALPHA_APECS
355	bool
356	depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
357	default y
358
359config ALPHA_EB64P
360	bool
361	depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
362	default y
363	help
364	  Uses 21064 or 21064A and APECs.  Has ISA and PCI expansion (3 ISA,
365	  2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
366	  ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
367	  (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
368	  SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM.  PC-AT size.
369	  Runs from standard PC power supply.
370
371config ALPHA_EV5
372	bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
373	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
374
375config ALPHA_EV4
376	bool
377	default y if ALPHA_LYNX && !ALPHA_EV5
378
379config ALPHA_CIA
380	bool
381	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
382	default y
383
384config ALPHA_EV56
385	bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
386	default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
387
388config ALPHA_EV56
389	prompt "EV56 CPU (speed >= 333MHz)?"
390	depends on ALPHA_NORITAKE || ALPHA_PRIMO
391
392config ALPHA_EV56
393	prompt "EV56 CPU (speed >= 400MHz)?"
394	depends on ALPHA_RAWHIDE
395
396config ALPHA_PRIMO
397	bool "EV5 CPU daughtercard (model 5/xxx)?"
398	depends on ALPHA_NORITAKE || ALPHA_MIKASA
399	help
400	  Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
401
402config ALPHA_GAMMA
403	bool "EV5 CPU(s) (model 5/xxx)?"
404	depends on ALPHA_SABLE
405	help
406	  Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
407
408config ALPHA_GAMMA
409	bool
410	depends on ALPHA_LYNX
411	default y
412
413config ALPHA_T2
414	bool
415	depends on ALPHA_SABLE || ALPHA_LYNX
416	default y
417
418config ALPHA_PYXIS
419	bool
420	depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
421	default y
422
423config ALPHA_EV6
424	bool
425	depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
426	default y
427
428config ALPHA_TSUNAMI
429	bool
430	depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
431	default y
432
433config ALPHA_EV67
434	bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
435	default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
436	help
437	  Is this a machine based on the EV67 core?  If in doubt, select N here
438	  and the machine will be treated as an EV6.
439
440config ALPHA_MCPCIA
441	bool
442	depends on ALPHA_RAWHIDE
443	default y
444
445config ALPHA_POLARIS
446	bool
447	depends on ALPHA_RX164
448	default y
449
450config ALPHA_IRONGATE
451	bool
452	depends on ALPHA_NAUTILUS
453	default y
454
455config GENERIC_HWEIGHT
456	bool
457	default y if !ALPHA_EV67
458
459config ALPHA_AVANTI
460	bool
461	depends on ALPHA_XL || ALPHA_AVANTI_CH
462	default y
463	help
464	  Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
465	  Alphas. Info at
466	  <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
467
468config ALPHA_BROKEN_IRQ_MASK
469	bool
470	depends on ALPHA_GENERIC || ALPHA_PC164
471	default y
472
473config VGA_HOSE
474	bool
475	depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
476	default y
477	help
478	  Support VGA on an arbitrary hose; needed for several platforms
479	  which always have multiple hoses, and whose consoles support it.
480
481
482config ALPHA_QEMU
483	bool "Run under QEMU emulation"
484	depends on !ALPHA_GENERIC
485	help
486	  Assume the presence of special features supported by QEMU PALcode
487	  that reduce the overhead of system emulation.
488
489	  Generic kernels will auto-detect QEMU.  But when building a
490	  system-specific kernel, the assumption is that we want to
491	  eliminate as many runtime tests as possible.
492
493	  If unsure, say N.
494
495
496config ALPHA_SRM
497	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
498	depends on TTY
499	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
500	help
501	  There are two different types of booting firmware on Alphas: SRM,
502	  which is command line driven, and ARC, which uses menus and arrow
503	  keys. Details about the Linux/Alpha booting process are contained in
504	  the Linux/Alpha FAQ, accessible on the WWW from
505	  <http://www.alphalinux.org/>.
506
507	  The usual way to load Linux on an Alpha machine is to use MILO
508	  (a bootloader that lets you pass command line parameters to the
509	  kernel just like lilo does for the x86 architecture) which can be
510	  loaded either from ARC or can be installed directly as a permanent
511	  firmware replacement from floppy (which requires changing a certain
512	  jumper on the motherboard). If you want to do either of these, say N
513	  here. If MILO doesn't work on your system (true for Jensen
514	  motherboards), you can bypass it altogether and boot Linux directly
515	  from an SRM console; say Y here in order to do that. Note that you
516	  won't be able to boot from an IDE disk using SRM.
517
518	  If unsure, say N.
519
520config ARCH_MAY_HAVE_PC_FDC
521	def_bool y
522
523config SMP
524	bool "Symmetric multi-processing support"
525	depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
526	help
527	  This enables support for systems with more than one CPU. If you have
528	  a system with only one CPU, say N. If you have a system with more
529	  than one CPU, say Y.
530
531	  If you say N here, the kernel will run on uni- and multiprocessor
532	  machines, but will use only one CPU of a multiprocessor machine. If
533	  you say Y here, the kernel will run on many, but not all,
534	  uniprocessor machines. On a uniprocessor machine, the kernel
535	  will run faster if you say N here.
536
537	  See also the SMP-HOWTO available at
538	  <http://www.tldp.org/docs.html#howto>.
539
540	  If you don't know what to do here, say N.
541
542config NR_CPUS
543	int "Maximum number of CPUs (2-32)"
544	range 2 32
545	depends on SMP
546	default "32" if ALPHA_GENERIC || ALPHA_MARVEL
547	default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
548	help
549	  MARVEL support can handle a maximum of 32 CPUs, all the others
550	  with working support have a maximum of 4 CPUs.
551
552config ARCH_DISCONTIGMEM_ENABLE
553	bool "Discontiguous Memory Support"
554	help
555	  Say Y to support efficient handling of discontiguous physical memory,
556	  for architectures which are either NUMA (Non-Uniform Memory Access)
557	  or have huge holes in the physical address space for other reasons.
558	  See <file:Documentation/vm/numa.rst> for more.
559
560config NUMA
561	bool "NUMA Support (EXPERIMENTAL)"
562	depends on DISCONTIGMEM && BROKEN
563	help
564	  Say Y to compile the kernel to support NUMA (Non-Uniform Memory
565	  Access).  This option is for configuring high-end multiprocessor
566	  server machines.  If in doubt, say N.
567
568config ALPHA_WTINT
569	bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
570	default y if ALPHA_QEMU
571	default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
572	default n if !ALPHA_SRM && !ALPHA_GENERIC
573	default y if SMP
574	help
575	  The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
576	  to sleep until the next interrupt.  This may reduce the power
577	  consumed, and the heat produced by the computer.  However, it has
578	  the side effect of making the cycle counter unreliable as a timing
579	  device across the sleep.
580
581	  For emulation under QEMU, definitely say Y here, as we have other
582	  mechanisms for measuring time than the cycle counter.
583
584	  For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
585	  MILO, sleep mode is not supported so you might as well say N here.
586
587	  For SMP systems we cannot use the cycle counter for timing anyway,
588	  so you might as well say Y here.
589
590	  If unsure, say N.
591
592config NODES_SHIFT
593	int
594	default "7"
595	depends on NEED_MULTIPLE_NODES
596
597# LARGE_VMALLOC is racy, if you *really* need it then fix it first
598config ALPHA_LARGE_VMALLOC
599	bool
600	help
601	  Process creation and other aspects of virtual memory management can
602	  be streamlined if we restrict the kernel to one PGD for all vmalloc
603	  allocations.  This equates to about 8GB.
604
605	  Under normal circumstances, this is so far and above what is needed
606	  as to be laughable.  However, there are certain applications (such
607	  as benchmark-grade in-kernel web serving) that can make use of as
608	  much vmalloc space as is available.
609
610	  Say N unless you know you need gobs and gobs of vmalloc space.
611
612config VERBOSE_MCHECK
613	bool "Verbose Machine Checks"
614
615config VERBOSE_MCHECK_ON
616	int "Verbose Printing Mode (0=off, 1=on, 2=all)"
617	depends on VERBOSE_MCHECK
618	default 1
619	help
620	  This option allows the default printing mode to be set, and then
621	  possibly overridden by a boot command argument.
622
623	  For example, if one wanted the option of printing verbose
624	  machine checks, but wanted the default to be as if verbose
625	  machine check printing was turned off, then one would choose
626	  the printing mode to be 0. Then, upon reboot, one could add
627	  the boot command line "verbose_mcheck=1" to get the normal
628	  verbose machine check printing, or "verbose_mcheck=2" to get
629	  the maximum information available.
630
631	  Take the default (1) unless you want more control or more info.
632
633choice
634	prompt "Timer interrupt frequency (HZ)?"
635	default HZ_128 if ALPHA_QEMU
636	default HZ_1200 if ALPHA_RAWHIDE
637	default HZ_1024
638	help
639	  The frequency at which timer interrupts occur.  A high frequency
640	  minimizes latency, whereas a low frequency minimizes overhead of
641	  process accounting.  The later effect is especially significant
642	  when being run under QEMU.
643
644	  Note that some Alpha hardware cannot change the interrupt frequency
645	  of the timer.  If unsure, say 1024 (or 1200 for Rawhide).
646
647	config HZ_32
648		bool "32 Hz"
649	config HZ_64
650		bool "64 Hz"
651	config HZ_128
652		bool "128 Hz"
653	config HZ_256
654		bool "256 Hz"
655	config HZ_1024
656		bool "1024 Hz"
657	config HZ_1200
658		bool "1200 Hz"
659endchoice
660
661config HZ
662	int
663	default 32 if HZ_32
664	default 64 if HZ_64
665	default 128 if HZ_128
666	default 256 if HZ_256
667	default 1200 if HZ_1200
668	default 1024
669
670config SRM_ENV
671	tristate "SRM environment through procfs"
672	depends on PROC_FS
673	help
674	  If you enable this option, a subdirectory inside /proc called
675	  /proc/srm_environment will give you access to the all important
676	  SRM environment variables (those which have a name) and also
677	  to all others (by their internal number).
678
679	  SRM is something like a BIOS for Alpha machines. There are some
680	  other such BIOSes, like AlphaBIOS, which this driver cannot
681	  support (hey, that's not SRM!).
682
683	  Despite the fact that this driver doesn't work on all Alphas (but
684	  only on those which have SRM as their firmware), it's save to
685	  build it even if your particular machine doesn't know about SRM
686	  (or if you intend to compile a generic kernel). It will simply
687	  not create those subdirectory in /proc (and give you some warning,
688	  of course).
689
690	  This driver is also available as a module and will be called
691	  srm_env then.
692
693endmenu
694
695# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
696# but we also need it if VGA_HOSE is set
697config DUMMY_CONSOLE
698	bool
699	depends on VGA_HOSE
700	default y
701