tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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