Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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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_AOUT
16 select HAVE_ASM_MODVERSIONS
17 select HAVE_IDE
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_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 select SET_FS
42 select SPARSEMEM_EXTREME if SPARSEMEM
43 select ZONE_DMA
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 GENERIC_ISA_DMA
70 bool
71 default y
72
73config PGTABLE_LEVELS
74 int
75 default 3
76
77config AUDIT_ARCH
78 bool
79
80menu "System setup"
81
82choice
83 prompt "Alpha system type"
84 default ALPHA_GENERIC
85 help
86 This is the system type of your hardware. A "generic" kernel will
87 run on any supported Alpha system. However, if you configure a
88 kernel for your specific system, it will be faster and smaller.
89
90 To find out what type of Alpha system you have, you may want to
91 check out the Linux/Alpha FAQ, accessible on the WWW from
92 <http://www.alphalinux.org/>. In summary:
93
94 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
95 Alpha-XL XL-233, XL-266
96 AlphaBook1 Alpha laptop
97 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
98 Cabriolet AlphaPC64, AlphaPCI64
99 DP264 DP264 / DS20 / ES40 / DS10 / DS10L
100 EB164 EB164 21164 evaluation board
101 EB64+ EB64+ 21064 evaluation board
102 EB66 EB66 21066 evaluation board
103 EB66+ EB66+ 21066 evaluation board
104 Jensen DECpc 150, DEC 2000 models 300, 500
105 LX164 AlphaPC164-LX
106 Lynx AS 2100A
107 Miata Personal Workstation 433/500/600 a/au
108 Marvel AlphaServer ES47 / ES80 / GS1280
109 Mikasa AS 1000
110 Noname AXPpci33, UDB (Multia)
111 Noritake AS 1000A, AS 600A, AS 800
112 PC164 AlphaPC164
113 Rawhide AS 1200, AS 4000, AS 4100
114 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
115 SX164 AlphaPC164-SX
116 Sable AS 2000, AS 2100
117 Shark DS 20L
118 Takara Takara (OEM)
119 Titan AlphaServer ES45 / DS25 / DS15
120 Wildfire AlphaServer GS 40/80/160/320
121
122 If you don't know what to do, choose "generic".
123
124config ALPHA_GENERIC
125 bool "Generic"
126 depends on TTY
127 select HAVE_EISA
128 help
129 A generic kernel will run on all supported Alpha hardware.
130
131config ALPHA_ALCOR
132 bool "Alcor/Alpha-XLT"
133 select HAVE_EISA
134 help
135 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
136 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
137 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
138 controller (256-bit memory bus) and a PCI interface. It also does
139 all the work required to support an external Bcache and to maintain
140 memory coherence when a PCI device DMAs into (or out of) memory.
141
142config ALPHA_XL
143 bool "Alpha-XL"
144 help
145 XL-233 and XL-266-based Alpha systems.
146
147config ALPHA_BOOK1
148 bool "AlphaBook1"
149 help
150 Dec AlphaBook1/Burns Alpha-based laptops.
151
152config ALPHA_AVANTI_CH
153 bool "Avanti"
154
155config ALPHA_CABRIOLET
156 bool "Cabriolet"
157 help
158 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now
159 baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
160 slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
161 Bcache SIMMs. Requires power supply with 3.3V output.
162
163config ALPHA_DP264
164 bool "DP264"
165 help
166 Various 21264 systems with the tsunami core logic chipset.
167 API Networks: 264DP, UP2000(+), CS20;
168 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
169
170config ALPHA_EB164
171 bool "EB164"
172 help
173 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has
174 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
175 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in
176 Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
177 MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized
178 motherboard. Requires power supply with 3.3V output.
179
180config ALPHA_EB64P_CH
181 bool "EB64+"
182
183config ALPHA_EB66
184 bool "EB66"
185 help
186 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is
187 identical to EB64+. Baby PC-AT size. Runs from standard PC power
188 supply. The EB66 schematic was published as a marketing poster
189 advertising the 21066 as "the first microprocessor in the world with
190 embedded PCI".
191
192config ALPHA_EB66P
193 bool "EB66+"
194 help
195 Later variant of the EB66 board.
196
197config ALPHA_EIGER
198 bool "Eiger"
199 help
200 Apparently an obscure OEM single-board computer based on the
201 Typhoon/Tsunami chipset family. Information on it is scanty.
202
203config ALPHA_JENSEN
204 bool "Jensen"
205 depends on BROKEN
206 select HAVE_EISA
207 help
208 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
209 of the first-generation Alpha systems. A number of these systems
210 seem to be available on the second- hand market. The Jensen is a
211 floor-standing tower system which originally used a 150MHz 21064 It
212 used programmable logic to interface a 486 EISA I/O bridge to the
213 CPU.
214
215config ALPHA_LX164
216 bool "LX164"
217 help
218 A technical overview of this board is available at
219 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
220
221config ALPHA_LYNX
222 bool "Lynx"
223 select HAVE_EISA
224 help
225 AlphaServer 2100A-based systems.
226
227config ALPHA_MARVEL
228 bool "Marvel"
229 help
230 AlphaServer ES47 / ES80 / GS1280 based on EV7.
231
232config ALPHA_MIATA
233 bool "Miata"
234 select HAVE_EISA
235 help
236 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
237 or 600au).
238
239config ALPHA_MIKASA
240 bool "Mikasa"
241 help
242 AlphaServer 1000-based Alpha systems.
243
244config ALPHA_NAUTILUS
245 bool "Nautilus"
246 help
247 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
248
249config ALPHA_NONAME_CH
250 bool "Noname"
251
252config ALPHA_NORITAKE
253 bool "Noritake"
254 select HAVE_EISA
255 help
256 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
257 systems.
258
259config ALPHA_PC164
260 bool "PC164"
261
262config ALPHA_P2K
263 bool "Platform2000"
264
265config ALPHA_RAWHIDE
266 bool "Rawhide"
267 select HAVE_EISA
268 help
269 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
270 See HOWTO at
271 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
272
273config ALPHA_RUFFIAN
274 bool "Ruffian"
275 help
276 Samsung APC164UX. There is a page on known problems and workarounds
277 at <http://www.alphalinux.org/faq/FAQ-11.html>.
278
279config ALPHA_RX164
280 bool "RX164"
281
282config ALPHA_SX164
283 bool "SX164"
284
285config ALPHA_SABLE
286 bool "Sable"
287 select HAVE_EISA
288 help
289 Digital AlphaServer 2000 and 2100-based systems.
290
291config ALPHA_SHARK
292 bool "Shark"
293
294config ALPHA_TAKARA
295 bool "Takara"
296 help
297 Alpha 11164-based OEM single-board computer.
298
299config ALPHA_TITAN
300 bool "Titan"
301 help
302 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
303
304config ALPHA_WILDFIRE
305 bool "Wildfire"
306 help
307 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
308
309endchoice
310
311# clear all implied options (don't want default values for those):
312# Most of these machines have ISA slots; not exactly sure which don't,
313# and this doesn't activate hordes of code, so do it always.
314config ISA
315 bool
316 default y
317 help
318 Find out whether you have ISA slots on your motherboard. ISA is the
319 name of a bus system, i.e. the way the CPU talks to the other stuff
320 inside your box. Other bus systems are PCI, EISA, MicroChannel
321 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
322 newer boards don't support it. If you have ISA, say Y, otherwise N.
323
324config ISA_DMA_API
325 bool
326 default y
327
328config ALPHA_NONAME
329 bool
330 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
331 default y
332 help
333 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
334 UDB). This design was produced by Digital's Technical OEM (TOEM)
335 group. It uses the 21066 processor running at 166MHz or 233MHz. It
336 is a baby-AT size, and runs from a standard PC power supply. It has
337 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
338 2 versions, with either PS/2 or large DIN connectors for the
339 keyboard.
340
341config ALPHA_EV4
342 bool
343 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
344 default y if !ALPHA_LYNX
345
346config ALPHA_LCA
347 bool
348 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
349 default y
350
351config ALPHA_APECS
352 bool
353 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
354 default y
355
356config ALPHA_EB64P
357 bool
358 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
359 default y
360 help
361 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA,
362 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
363 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
364 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
365 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size.
366 Runs from standard PC power supply.
367
368config ALPHA_EV5
369 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
370 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
371
372config ALPHA_EV4
373 bool
374 default y if ALPHA_LYNX && !ALPHA_EV5
375
376config ALPHA_CIA
377 bool
378 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
379 default y
380
381config ALPHA_EV56
382 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
383 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
384
385config ALPHA_EV56
386 prompt "EV56 CPU (speed >= 333MHz)?"
387 depends on ALPHA_NORITAKE || ALPHA_PRIMO
388
389config ALPHA_EV56
390 prompt "EV56 CPU (speed >= 400MHz)?"
391 depends on ALPHA_RAWHIDE
392
393config ALPHA_PRIMO
394 bool "EV5 CPU daughtercard (model 5/xxx)?"
395 depends on ALPHA_NORITAKE || ALPHA_MIKASA
396 help
397 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
398
399config ALPHA_GAMMA
400 bool "EV5 CPU(s) (model 5/xxx)?"
401 depends on ALPHA_SABLE
402 help
403 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
404
405config ALPHA_GAMMA
406 bool
407 depends on ALPHA_LYNX
408 default y
409
410config ALPHA_T2
411 bool
412 depends on ALPHA_SABLE || ALPHA_LYNX
413 default y
414
415config ALPHA_PYXIS
416 bool
417 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
418 default y
419
420config ALPHA_EV6
421 bool
422 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
423 default y
424
425config ALPHA_TSUNAMI
426 bool
427 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
428 default y
429
430config ALPHA_EV67
431 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
432 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
433 help
434 Is this a machine based on the EV67 core? If in doubt, select N here
435 and the machine will be treated as an EV6.
436
437config ALPHA_MCPCIA
438 bool
439 depends on ALPHA_RAWHIDE
440 default y
441
442config ALPHA_POLARIS
443 bool
444 depends on ALPHA_RX164
445 default y
446
447config ALPHA_IRONGATE
448 bool
449 depends on ALPHA_NAUTILUS
450 default y
451
452config GENERIC_HWEIGHT
453 bool
454 default y if !ALPHA_EV67
455
456config ALPHA_AVANTI
457 bool
458 depends on ALPHA_XL || ALPHA_AVANTI_CH
459 default y
460 help
461 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
462 Alphas. Info at
463 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
464
465config ALPHA_BROKEN_IRQ_MASK
466 bool
467 depends on ALPHA_GENERIC || ALPHA_PC164
468 default y
469
470config VGA_HOSE
471 bool
472 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
473 default y
474 help
475 Support VGA on an arbitrary hose; needed for several platforms
476 which always have multiple hoses, and whose consoles support it.
477
478
479config ALPHA_QEMU
480 bool "Run under QEMU emulation"
481 depends on !ALPHA_GENERIC
482 help
483 Assume the presence of special features supported by QEMU PALcode
484 that reduce the overhead of system emulation.
485
486 Generic kernels will auto-detect QEMU. But when building a
487 system-specific kernel, the assumption is that we want to
488 eliminate as many runtime tests as possible.
489
490 If unsure, say N.
491
492
493config ALPHA_SRM
494 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
495 depends on TTY
496 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
497 help
498 There are two different types of booting firmware on Alphas: SRM,
499 which is command line driven, and ARC, which uses menus and arrow
500 keys. Details about the Linux/Alpha booting process are contained in
501 the Linux/Alpha FAQ, accessible on the WWW from
502 <http://www.alphalinux.org/>.
503
504 The usual way to load Linux on an Alpha machine is to use MILO
505 (a bootloader that lets you pass command line parameters to the
506 kernel just like lilo does for the x86 architecture) which can be
507 loaded either from ARC or can be installed directly as a permanent
508 firmware replacement from floppy (which requires changing a certain
509 jumper on the motherboard). If you want to do either of these, say N
510 here. If MILO doesn't work on your system (true for Jensen
511 motherboards), you can bypass it altogether and boot Linux directly
512 from an SRM console; say Y here in order to do that. Note that you
513 won't be able to boot from an IDE disk using SRM.
514
515 If unsure, say N.
516
517config ARCH_MAY_HAVE_PC_FDC
518 def_bool y
519
520config SMP
521 bool "Symmetric multi-processing support"
522 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
523 help
524 This enables support for systems with more than one CPU. If you have
525 a system with only one CPU, say N. If you have a system with more
526 than one CPU, say Y.
527
528 If you say N here, the kernel will run on uni- and multiprocessor
529 machines, but will use only one CPU of a multiprocessor machine. If
530 you say Y here, the kernel will run on many, but not all,
531 uniprocessor machines. On a uniprocessor machine, the kernel
532 will run faster if you say N here.
533
534 See also the SMP-HOWTO available at
535 <http://www.tldp.org/docs.html#howto>.
536
537 If you don't know what to do here, say N.
538
539config NR_CPUS
540 int "Maximum number of CPUs (2-32)"
541 range 2 32
542 depends on SMP
543 default "32" if ALPHA_GENERIC || ALPHA_MARVEL
544 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
545 help
546 MARVEL support can handle a maximum of 32 CPUs, all the others
547 with working support have a maximum of 4 CPUs.
548
549config ARCH_SPARSEMEM_ENABLE
550 bool "Sparse Memory Support"
551 help
552 Say Y to support efficient handling of discontiguous physical memory,
553 for systems that have huge holes in the physical address space.
554
555config ALPHA_WTINT
556 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
557 default y if ALPHA_QEMU
558 default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
559 default n if !ALPHA_SRM && !ALPHA_GENERIC
560 default y if SMP
561 help
562 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
563 to sleep until the next interrupt. This may reduce the power
564 consumed, and the heat produced by the computer. However, it has
565 the side effect of making the cycle counter unreliable as a timing
566 device across the sleep.
567
568 For emulation under QEMU, definitely say Y here, as we have other
569 mechanisms for measuring time than the cycle counter.
570
571 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
572 MILO, sleep mode is not supported so you might as well say N here.
573
574 For SMP systems we cannot use the cycle counter for timing anyway,
575 so you might as well say Y here.
576
577 If unsure, say N.
578
579# LARGE_VMALLOC is racy, if you *really* need it then fix it first
580config ALPHA_LARGE_VMALLOC
581 bool
582 help
583 Process creation and other aspects of virtual memory management can
584 be streamlined if we restrict the kernel to one PGD for all vmalloc
585 allocations. This equates to about 8GB.
586
587 Under normal circumstances, this is so far and above what is needed
588 as to be laughable. However, there are certain applications (such
589 as benchmark-grade in-kernel web serving) that can make use of as
590 much vmalloc space as is available.
591
592 Say N unless you know you need gobs and gobs of vmalloc space.
593
594config VERBOSE_MCHECK
595 bool "Verbose Machine Checks"
596
597config VERBOSE_MCHECK_ON
598 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
599 depends on VERBOSE_MCHECK
600 default 1
601 help
602 This option allows the default printing mode to be set, and then
603 possibly overridden by a boot command argument.
604
605 For example, if one wanted the option of printing verbose
606 machine checks, but wanted the default to be as if verbose
607 machine check printing was turned off, then one would choose
608 the printing mode to be 0. Then, upon reboot, one could add
609 the boot command line "verbose_mcheck=1" to get the normal
610 verbose machine check printing, or "verbose_mcheck=2" to get
611 the maximum information available.
612
613 Take the default (1) unless you want more control or more info.
614
615choice
616 prompt "Timer interrupt frequency (HZ)?"
617 default HZ_128 if ALPHA_QEMU
618 default HZ_1200 if ALPHA_RAWHIDE
619 default HZ_1024
620 help
621 The frequency at which timer interrupts occur. A high frequency
622 minimizes latency, whereas a low frequency minimizes overhead of
623 process accounting. The later effect is especially significant
624 when being run under QEMU.
625
626 Note that some Alpha hardware cannot change the interrupt frequency
627 of the timer. If unsure, say 1024 (or 1200 for Rawhide).
628
629 config HZ_32
630 bool "32 Hz"
631 config HZ_64
632 bool "64 Hz"
633 config HZ_128
634 bool "128 Hz"
635 config HZ_256
636 bool "256 Hz"
637 config HZ_1024
638 bool "1024 Hz"
639 config HZ_1200
640 bool "1200 Hz"
641endchoice
642
643config HZ
644 int
645 default 32 if HZ_32
646 default 64 if HZ_64
647 default 128 if HZ_128
648 default 256 if HZ_256
649 default 1200 if HZ_1200
650 default 1024
651
652config SRM_ENV
653 tristate "SRM environment through procfs"
654 depends on PROC_FS
655 help
656 If you enable this option, a subdirectory inside /proc called
657 /proc/srm_environment will give you access to the all important
658 SRM environment variables (those which have a name) and also
659 to all others (by their internal number).
660
661 SRM is something like a BIOS for Alpha machines. There are some
662 other such BIOSes, like AlphaBIOS, which this driver cannot
663 support (hey, that's not SRM!).
664
665 Despite the fact that this driver doesn't work on all Alphas (but
666 only on those which have SRM as their firmware), it's save to
667 build it even if your particular machine doesn't know about SRM
668 (or if you intend to compile a generic kernel). It will simply
669 not create those subdirectory in /proc (and give you some warning,
670 of course).
671
672 This driver is also available as a module and will be called
673 srm_env then.
674
675endmenu
676
677# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
678# but we also need it if VGA_HOSE is set
679config DUMMY_CONSOLE
680 bool
681 depends on VGA_HOSE
682 default y