Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
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_HAS_CURRENT_STACK_POINTER
7 select ARCH_MIGHT_HAVE_PC_PARPORT
8 select ARCH_MIGHT_HAVE_PC_SERIO
9 select ARCH_NO_PREEMPT
10 select ARCH_NO_SG_CHAIN
11 select ARCH_USE_CMPXCHG_LOCKREF
12 select DMA_OPS if PCI
13 select FORCE_PCI if !ALPHA_JENSEN
14 select PCI_DOMAINS if PCI
15 select PCI_SYSCALL if PCI
16 select HAVE_ASM_MODVERSIONS
17 select HAVE_PCSPKR_PLATFORM
18 select HAVE_PERF_EVENTS
19 select NEED_DMA_MAP_STATE
20 select NEED_SG_DMA_LENGTH
21 select GENERIC_IRQ_PROBE
22 select GENERIC_PCI_IOMAP
23 select AUTO_IRQ_AFFINITY if SMP
24 select GENERIC_IRQ_SHOW
25 select ARCH_WANT_IPC_PARSE_VERSION
26 select ARCH_HAVE_NMI_SAFE_CMPXCHG
27 select AUDIT_ARCH
28 select GENERIC_CPU_VULNERABILITIES
29 select GENERIC_SMP_IDLE_THREAD
30 select HAVE_ARCH_AUDITSYSCALL
31 select HAVE_MOD_ARCH_SPECIFIC
32 select MODULES_USE_ELF_RELA
33 select ODD_RT_SIGACTION
34 select OLD_SIGSUSPEND
35 select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
36 select MMU_GATHER_NO_RANGE
37 select SPARSEMEM_EXTREME if SPARSEMEM
38 select ZONE_DMA
39 help
40 The Alpha is a 64-bit general-purpose processor designed and
41 marketed by the Digital Equipment Corporation of blessed memory,
42 now Hewlett-Packard. The Alpha Linux project has a home page at
43 <http://www.alphalinux.org/>.
44
45config 64BIT
46 def_bool y
47
48config MMU
49 bool
50 default y
51
52config ARCH_HAS_ILOG2_U32
53 bool
54 default n
55
56config ARCH_HAS_ILOG2_U64
57 bool
58 default n
59
60config GENERIC_CALIBRATE_DELAY
61 bool
62 default y
63
64config GENERIC_ISA_DMA
65 bool
66 default y
67
68config PGTABLE_LEVELS
69 int
70 default 3
71
72config AUDIT_ARCH
73 bool
74
75menu "System setup"
76
77choice
78 prompt "Alpha system type"
79 default ALPHA_GENERIC
80 help
81 This is the system type of your hardware. A "generic" kernel will
82 run on any supported Alpha system. However, if you configure a
83 kernel for your specific system, it will be faster and smaller.
84
85 To find out what type of Alpha system you have, you may want to
86 check out the Linux/Alpha FAQ, accessible on the WWW from
87 <http://www.alphalinux.org/>. In summary:
88
89 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
90 Alpha-XL XL-233, XL-266
91 AlphaBook1 Alpha laptop
92 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
93 Cabriolet AlphaPC64, AlphaPCI64
94 DP264 DP264 / DS20 / ES40 / DS10 / DS10L
95 EB164 EB164 21164 evaluation board
96 EB64+ EB64+ 21064 evaluation board
97 EB66 EB66 21066 evaluation board
98 EB66+ EB66+ 21066 evaluation board
99 Jensen DECpc 150, DEC 2000 models 300, 500
100 LX164 AlphaPC164-LX
101 Lynx AS 2100A
102 Miata Personal Workstation 433/500/600 a/au
103 Marvel AlphaServer ES47 / ES80 / GS1280
104 Mikasa AS 1000
105 Noname AXPpci33, UDB (Multia)
106 Noritake AS 1000A, AS 600A, AS 800
107 PC164 AlphaPC164
108 Rawhide AS 1200, AS 4000, AS 4100
109 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
110 SX164 AlphaPC164-SX
111 Sable AS 2000, AS 2100
112 Shark DS 20L
113 Takara Takara (OEM)
114 Titan AlphaServer ES45 / DS25 / DS15
115 Wildfire AlphaServer GS 40/80/160/320
116
117 If you don't know what to do, choose "generic".
118
119config ALPHA_GENERIC
120 bool "Generic"
121 depends on TTY
122 select HAVE_EISA
123 help
124 A generic kernel will run on all supported Alpha hardware.
125
126config ALPHA_ALCOR
127 bool "Alcor/Alpha-XLT"
128 select HAVE_EISA
129 help
130 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
131 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
132 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
133 controller (256-bit memory bus) and a PCI interface. It also does
134 all the work required to support an external Bcache and to maintain
135 memory coherence when a PCI device DMAs into (or out of) memory.
136
137config ALPHA_XL
138 bool "Alpha-XL"
139 help
140 XL-233 and XL-266-based Alpha systems.
141
142config ALPHA_BOOK1
143 bool "AlphaBook1"
144 help
145 Dec AlphaBook1/Burns Alpha-based laptops.
146
147config ALPHA_AVANTI_CH
148 bool "Avanti"
149
150config ALPHA_CABRIOLET
151 bool "Cabriolet"
152 help
153 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now
154 baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
155 slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
156 Bcache SIMMs. Requires power supply with 3.3V output.
157
158config ALPHA_DP264
159 bool "DP264"
160 help
161 Various 21264 systems with the tsunami core logic chipset.
162 API Networks: 264DP, UP2000(+), CS20;
163 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
164
165config ALPHA_EB164
166 bool "EB164"
167 help
168 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has
169 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
170 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in
171 Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
172 MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized
173 motherboard. Requires power supply with 3.3V output.
174
175config ALPHA_EB64P_CH
176 bool "EB64+"
177
178config ALPHA_EB66
179 bool "EB66"
180 help
181 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is
182 identical to EB64+. Baby PC-AT size. Runs from standard PC power
183 supply. The EB66 schematic was published as a marketing poster
184 advertising the 21066 as "the first microprocessor in the world with
185 embedded PCI".
186
187config ALPHA_EB66P
188 bool "EB66+"
189 help
190 Later variant of the EB66 board.
191
192config ALPHA_EIGER
193 bool "Eiger"
194 help
195 Apparently an obscure OEM single-board computer based on the
196 Typhoon/Tsunami chipset family. Information on it is scanty.
197
198config ALPHA_JENSEN
199 bool "Jensen"
200 select HAVE_EISA
201 help
202 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
203 of the first-generation Alpha systems. A number of these systems
204 seem to be available on the second- hand market. The Jensen is a
205 floor-standing tower system which originally used a 150MHz 21064 It
206 used programmable logic to interface a 486 EISA I/O bridge to the
207 CPU.
208
209config ALPHA_LX164
210 bool "LX164"
211 help
212 A technical overview of this board is available at
213 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
214
215config ALPHA_LYNX
216 bool "Lynx"
217 select HAVE_EISA
218 help
219 AlphaServer 2100A-based systems.
220
221config ALPHA_MARVEL
222 bool "Marvel"
223 help
224 AlphaServer ES47 / ES80 / GS1280 based on EV7.
225
226config ALPHA_MIATA
227 bool "Miata"
228 select HAVE_EISA
229 help
230 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
231 or 600au).
232
233config ALPHA_MIKASA
234 bool "Mikasa"
235 help
236 AlphaServer 1000-based Alpha systems.
237
238config ALPHA_NAUTILUS
239 bool "Nautilus"
240 help
241 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
242
243config ALPHA_NONAME_CH
244 bool "Noname"
245
246config ALPHA_NORITAKE
247 bool "Noritake"
248 select HAVE_EISA
249 help
250 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
251 systems.
252
253config ALPHA_PC164
254 bool "PC164"
255
256config ALPHA_P2K
257 bool "Platform2000"
258
259config ALPHA_RAWHIDE
260 bool "Rawhide"
261 select HAVE_EISA
262 help
263 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
264 See HOWTO at
265 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
266
267config ALPHA_RUFFIAN
268 bool "Ruffian"
269 help
270 Samsung APC164UX. There is a page on known problems and workarounds
271 at <http://www.alphalinux.org/faq/FAQ-11.html>.
272
273config ALPHA_RX164
274 bool "RX164"
275
276config ALPHA_SX164
277 bool "SX164"
278
279config ALPHA_SABLE
280 bool "Sable"
281 select HAVE_EISA
282 help
283 Digital AlphaServer 2000 and 2100-based systems.
284
285config ALPHA_SHARK
286 bool "Shark"
287
288config ALPHA_TAKARA
289 bool "Takara"
290 help
291 Alpha 11164-based OEM single-board computer.
292
293config ALPHA_TITAN
294 bool "Titan"
295 help
296 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
297
298config ALPHA_WILDFIRE
299 bool "Wildfire"
300 help
301 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
302
303endchoice
304
305# clear all implied options (don't want default values for those):
306# Most of these machines have ISA slots; not exactly sure which don't,
307# and this doesn't activate hordes of code, so do it always.
308config ISA
309 bool
310 default y
311 help
312 Find out whether you have ISA slots on your motherboard. ISA is the
313 name of a bus system, i.e. the way the CPU talks to the other stuff
314 inside your box. Other bus systems are PCI, EISA, MicroChannel
315 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
316 newer boards don't support it. If you have ISA, say Y, otherwise N.
317
318config ISA_DMA_API
319 bool
320 default y
321
322config ALPHA_NONAME
323 bool
324 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
325 default y
326 help
327 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
328 UDB). This design was produced by Digital's Technical OEM (TOEM)
329 group. It uses the 21066 processor running at 166MHz or 233MHz. It
330 is a baby-AT size, and runs from a standard PC power supply. It has
331 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
332 2 versions, with either PS/2 or large DIN connectors for the
333 keyboard.
334
335config ALPHA_EV4
336 bool
337 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
338 default y if !ALPHA_LYNX
339
340config ALPHA_LCA
341 bool
342 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
343 default y
344
345config ALPHA_APECS
346 bool
347 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
348 default y
349
350config ALPHA_EB64P
351 bool
352 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
353 default y
354 help
355 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA,
356 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
357 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
358 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
359 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size.
360 Runs from standard PC power supply.
361
362config ALPHA_EV5
363 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
364 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
365
366config ALPHA_EV4
367 bool
368 default y if ALPHA_LYNX && !ALPHA_EV5
369
370config ALPHA_CIA
371 bool
372 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
373 default y
374
375config ALPHA_EV56
376 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
377 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
378
379config ALPHA_EV56
380 prompt "EV56 CPU (speed >= 333MHz)?"
381 depends on ALPHA_NORITAKE || ALPHA_PRIMO
382
383config ALPHA_EV56
384 prompt "EV56 CPU (speed >= 400MHz)?"
385 depends on ALPHA_RAWHIDE
386
387config ALPHA_PRIMO
388 bool "EV5 CPU daughtercard (model 5/xxx)?"
389 depends on ALPHA_NORITAKE || ALPHA_MIKASA
390 help
391 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
392
393config ALPHA_GAMMA
394 bool "EV5 CPU(s) (model 5/xxx)?"
395 depends on ALPHA_SABLE
396 help
397 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
398
399config ALPHA_GAMMA
400 bool
401 depends on ALPHA_LYNX
402 default y
403
404config ALPHA_T2
405 bool
406 depends on ALPHA_SABLE || ALPHA_LYNX
407 default y
408
409config ALPHA_PYXIS
410 bool
411 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
412 default y
413
414config ALPHA_EV6
415 bool
416 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
417 default y
418
419config ALPHA_TSUNAMI
420 bool
421 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
422 default y
423
424config ALPHA_EV67
425 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
426 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
427 help
428 Is this a machine based on the EV67 core? If in doubt, select N here
429 and the machine will be treated as an EV6.
430
431config ALPHA_MCPCIA
432 bool
433 depends on ALPHA_RAWHIDE
434 default y
435
436config ALPHA_POLARIS
437 bool
438 depends on ALPHA_RX164
439 default y
440
441config ALPHA_IRONGATE
442 bool
443 depends on ALPHA_NAUTILUS
444 default y
445
446config GENERIC_HWEIGHT
447 bool
448 default y if !ALPHA_EV67
449
450config ALPHA_AVANTI
451 bool
452 depends on ALPHA_XL || ALPHA_AVANTI_CH
453 default y
454 help
455 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
456 Alphas. Info at
457 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
458
459config ALPHA_BROKEN_IRQ_MASK
460 bool
461 depends on ALPHA_GENERIC || ALPHA_PC164
462 default y
463
464config VGA_HOSE
465 bool
466 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
467 default y
468 help
469 Support VGA on an arbitrary hose; needed for several platforms
470 which always have multiple hoses, and whose consoles support it.
471
472
473config ALPHA_QEMU
474 bool "Run under QEMU emulation"
475 depends on !ALPHA_GENERIC
476 help
477 Assume the presence of special features supported by QEMU PALcode
478 that reduce the overhead of system emulation.
479
480 Generic kernels will auto-detect QEMU. But when building a
481 system-specific kernel, the assumption is that we want to
482 eliminate as many runtime tests as possible.
483
484 If unsure, say N.
485
486
487config ALPHA_SRM
488 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
489 depends on TTY
490 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
491 help
492 There are two different types of booting firmware on Alphas: SRM,
493 which is command line driven, and ARC, which uses menus and arrow
494 keys. Details about the Linux/Alpha booting process are contained in
495 the Linux/Alpha FAQ, accessible on the WWW from
496 <http://www.alphalinux.org/>.
497
498 The usual way to load Linux on an Alpha machine is to use MILO
499 (a bootloader that lets you pass command line parameters to the
500 kernel just like lilo does for the x86 architecture) which can be
501 loaded either from ARC or can be installed directly as a permanent
502 firmware replacement from floppy (which requires changing a certain
503 jumper on the motherboard). If you want to do either of these, say N
504 here. If MILO doesn't work on your system (true for Jensen
505 motherboards), you can bypass it altogether and boot Linux directly
506 from an SRM console; say Y here in order to do that. Note that you
507 won't be able to boot from an IDE disk using SRM.
508
509 If unsure, say N.
510
511config ARCH_MAY_HAVE_PC_FDC
512 def_bool y
513
514config SMP
515 bool "Symmetric multi-processing support"
516 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
517 help
518 This enables support for systems with more than one CPU. If you have
519 a system with only one CPU, say N. If you have a system with more
520 than one CPU, say Y.
521
522 If you say N here, the kernel will run on uni- and multiprocessor
523 machines, but will use only one CPU of a multiprocessor machine. If
524 you say Y here, the kernel will run on many, but not all,
525 uniprocessor machines. On a uniprocessor machine, the kernel
526 will run faster if you say N here.
527
528 See also the SMP-HOWTO available at
529 <https://www.tldp.org/docs.html#howto>.
530
531 If you don't know what to do here, say N.
532
533config NR_CPUS
534 int "Maximum number of CPUs (2-32)"
535 range 2 32
536 depends on SMP
537 default "32" if ALPHA_GENERIC || ALPHA_MARVEL
538 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
539 help
540 MARVEL support can handle a maximum of 32 CPUs, all the others
541 with working support have a maximum of 4 CPUs.
542
543config ARCH_SPARSEMEM_ENABLE
544 bool "Sparse Memory Support"
545 help
546 Say Y to support efficient handling of discontiguous physical memory,
547 for systems that have huge holes in the physical address space.
548
549config ALPHA_WTINT
550 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
551 default y if ALPHA_QEMU
552 default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
553 default n if !ALPHA_SRM && !ALPHA_GENERIC
554 default y if SMP
555 help
556 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
557 to sleep until the next interrupt. This may reduce the power
558 consumed, and the heat produced by the computer. However, it has
559 the side effect of making the cycle counter unreliable as a timing
560 device across the sleep.
561
562 For emulation under QEMU, definitely say Y here, as we have other
563 mechanisms for measuring time than the cycle counter.
564
565 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
566 MILO, sleep mode is not supported so you might as well say N here.
567
568 For SMP systems we cannot use the cycle counter for timing anyway,
569 so you might as well say Y here.
570
571 If unsure, say N.
572
573# LARGE_VMALLOC is racy, if you *really* need it then fix it first
574config ALPHA_LARGE_VMALLOC
575 bool
576 help
577 Process creation and other aspects of virtual memory management can
578 be streamlined if we restrict the kernel to one PGD for all vmalloc
579 allocations. This equates to about 8GB.
580
581 Under normal circumstances, this is so far and above what is needed
582 as to be laughable. However, there are certain applications (such
583 as benchmark-grade in-kernel web serving) that can make use of as
584 much vmalloc space as is available.
585
586 Say N unless you know you need gobs and gobs of vmalloc space.
587
588config VERBOSE_MCHECK
589 bool "Verbose Machine Checks"
590
591config VERBOSE_MCHECK_ON
592 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
593 depends on VERBOSE_MCHECK
594 default 1
595 help
596 This option allows the default printing mode to be set, and then
597 possibly overridden by a boot command argument.
598
599 For example, if one wanted the option of printing verbose
600 machine checks, but wanted the default to be as if verbose
601 machine check printing was turned off, then one would choose
602 the printing mode to be 0. Then, upon reboot, one could add
603 the boot command line "verbose_mcheck=1" to get the normal
604 verbose machine check printing, or "verbose_mcheck=2" to get
605 the maximum information available.
606
607 Take the default (1) unless you want more control or more info.
608
609choice
610 prompt "Timer interrupt frequency (HZ)?"
611 default HZ_128 if ALPHA_QEMU
612 default HZ_1200 if ALPHA_RAWHIDE
613 default HZ_1024
614 help
615 The frequency at which timer interrupts occur. A high frequency
616 minimizes latency, whereas a low frequency minimizes overhead of
617 process accounting. The later effect is especially significant
618 when being run under QEMU.
619
620 Note that some Alpha hardware cannot change the interrupt frequency
621 of the timer. If unsure, say 1024 (or 1200 for Rawhide).
622
623 config HZ_32
624 bool "32 Hz"
625 config HZ_64
626 bool "64 Hz"
627 config HZ_128
628 bool "128 Hz"
629 config HZ_256
630 bool "256 Hz"
631 config HZ_1024
632 bool "1024 Hz"
633 config HZ_1200
634 bool "1200 Hz"
635endchoice
636
637config HZ
638 int
639 default 32 if HZ_32
640 default 64 if HZ_64
641 default 128 if HZ_128
642 default 256 if HZ_256
643 default 1200 if HZ_1200
644 default 1024
645
646config SRM_ENV
647 tristate "SRM environment through procfs"
648 depends on PROC_FS
649 help
650 If you enable this option, a subdirectory inside /proc called
651 /proc/srm_environment will give you access to the all important
652 SRM environment variables (those which have a name) and also
653 to all others (by their internal number).
654
655 SRM is something like a BIOS for Alpha machines. There are some
656 other such BIOSes, like AlphaBIOS, which this driver cannot
657 support (hey, that's not SRM!).
658
659 Despite the fact that this driver doesn't work on all Alphas (but
660 only on those which have SRM as their firmware), it's save to
661 build it even if your particular machine doesn't know about SRM
662 (or if you intend to compile a generic kernel). It will simply
663 not create those subdirectory in /proc (and give you some warning,
664 of course).
665
666 This driver is also available as a module and will be called
667 srm_env then.
668
669endmenu
670
671# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
672# but we also need it if VGA_HOSE is set
673config DUMMY_CONSOLE
674 bool
675 depends on VGA_HOSE
676 default y