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_HAS_CURRENT_STACK_POINTER
7 select ARCH_HAS_DMA_OPS if PCI
8 select ARCH_MIGHT_HAVE_PC_PARPORT
9 select ARCH_MIGHT_HAVE_PC_SERIO
10 select ARCH_NO_PREEMPT
11 select ARCH_NO_SG_CHAIN
12 select ARCH_USE_CMPXCHG_LOCKREF
13 select FORCE_PCI
14 select PCI_DOMAINS if PCI
15 select PCI_SYSCALL if PCI
16 select HAVE_ASM_MODVERSIONS
17 select HAVE_PAGE_SIZE_8KB
18 select HAVE_PCSPKR_PLATFORM
19 select HAVE_PERF_EVENTS
20 select NEED_DMA_MAP_STATE
21 select NEED_SG_DMA_LENGTH
22 select GENERIC_IRQ_PROBE
23 select GENERIC_PCI_IOMAP
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_CPU_VULNERABILITIES
30 select GENERIC_SMP_IDLE_THREAD
31 select HAS_IOPORT
32 select HAVE_ARCH_AUDITSYSCALL
33 select HAVE_MOD_ARCH_SPECIFIC
34 select LOCK_MM_AND_FIND_VMA
35 select MODULES_USE_ELF_RELA
36 select ODD_RT_SIGACTION
37 select OLD_SIGSUSPEND
38 select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
39 select MMU_GATHER_NO_RANGE
40 select SPARSEMEM_EXTREME if SPARSEMEM
41 select ZONE_DMA
42 help
43 The Alpha is a 64-bit general-purpose processor designed and
44 marketed by the Digital Equipment Corporation of blessed memory,
45 now Hewlett-Packard. The Alpha Linux project has a home page at
46 <http://www.alphalinux.org/>.
47
48config 64BIT
49 def_bool y
50
51config MMU
52 bool
53 default y
54
55config ARCH_HAS_ILOG2_U32
56 bool
57 default n
58
59config ARCH_HAS_ILOG2_U64
60 bool
61 default n
62
63config GENERIC_CALIBRATE_DELAY
64 bool
65 default y
66
67config GENERIC_ISA_DMA
68 bool
69 default y
70
71config PGTABLE_LEVELS
72 int
73 default 3
74
75config AUDIT_ARCH
76 bool
77
78menu "System setup"
79
80choice
81 prompt "Alpha system type"
82 default ALPHA_GENERIC
83 help
84 This is the system type of your hardware. A "generic" kernel will
85 run on any supported Alpha system. However, if you configure a
86 kernel for your specific system, it will be faster and smaller.
87
88 To find out what type of Alpha system you have, you may want to
89 check out the Linux/Alpha FAQ, accessible on the WWW from
90 <http://www.alphalinux.org/>. In summary:
91
92 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
93 DP264 DP264 / DS20 / ES40 / DS10 / DS10L
94 LX164 AlphaPC164-LX
95 Miata Personal Workstation 433/500/600 a/au
96 Marvel AlphaServer ES47 / ES80 / GS1280
97 Mikasa AS 1000
98 Noritake AS 1000A, AS 600A, AS 800
99 PC164 AlphaPC164
100 Rawhide AS 1200, AS 4000, AS 4100
101 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
102 SX164 AlphaPC164-SX
103 Sable AS 2000, AS 2100
104 Shark DS 20L
105 Takara Takara (OEM)
106 Titan AlphaServer ES45 / DS25 / DS15
107 Wildfire AlphaServer GS 40/80/160/320
108
109 If you don't know what to do, choose "generic".
110
111config ALPHA_GENERIC
112 bool "Generic"
113 depends on TTY
114 select HAVE_EISA
115 help
116 A generic kernel will run on all supported Alpha hardware.
117
118config ALPHA_ALCOR
119 bool "Alcor/Alpha-XLT"
120 select HAVE_EISA
121 help
122 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
123 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
124 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
125 controller (256-bit memory bus) and a PCI interface. It also does
126 all the work required to support an external Bcache and to maintain
127 memory coherence when a PCI device DMAs into (or out of) memory.
128
129config ALPHA_DP264
130 bool "DP264"
131 help
132 Various 21264 systems with the tsunami core logic chipset.
133 API Networks: 264DP, UP2000(+), CS20;
134 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
135
136config ALPHA_EIGER
137 bool "Eiger"
138 help
139 Apparently an obscure OEM single-board computer based on the
140 Typhoon/Tsunami chipset family. Information on it is scanty.
141
142config ALPHA_LX164
143 bool "LX164"
144 help
145 A technical overview of this board is available at
146 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
147
148config ALPHA_MARVEL
149 bool "Marvel"
150 help
151 AlphaServer ES47 / ES80 / GS1280 based on EV7.
152
153config ALPHA_MIATA
154 bool "Miata"
155 select HAVE_EISA
156 help
157 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
158 or 600au).
159
160config ALPHA_MIKASA
161 bool "Mikasa"
162 help
163 AlphaServer 1000-based Alpha systems.
164
165config ALPHA_NAUTILUS
166 bool "Nautilus"
167 help
168 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
169
170config ALPHA_NORITAKE
171 bool "Noritake"
172 select HAVE_EISA
173 help
174 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
175 systems.
176
177config ALPHA_PC164
178 bool "PC164"
179
180config ALPHA_RAWHIDE
181 bool "Rawhide"
182 select HAVE_EISA
183 help
184 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
185 See HOWTO at
186 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
187
188config ALPHA_RUFFIAN
189 bool "Ruffian"
190 help
191 Samsung APC164UX. There is a page on known problems and workarounds
192 at <http://www.alphalinux.org/faq/FAQ-11.html>.
193
194config ALPHA_RX164
195 bool "RX164"
196
197config ALPHA_SX164
198 bool "SX164"
199
200config ALPHA_SABLE
201 bool "Sable"
202 select HAVE_EISA
203 help
204 Digital AlphaServer 2000 and 2100-based systems.
205
206config ALPHA_SHARK
207 bool "Shark"
208
209config ALPHA_TAKARA
210 bool "Takara"
211 help
212 Alpha 11164-based OEM single-board computer.
213
214config ALPHA_TITAN
215 bool "Titan"
216 help
217 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
218
219config ALPHA_WILDFIRE
220 bool "Wildfire"
221 help
222 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
223
224endchoice
225
226# clear all implied options (don't want default values for those):
227# Most of these machines have ISA slots; not exactly sure which don't,
228# and this doesn't activate hordes of code, so do it always.
229config ISA
230 bool
231 default y
232 help
233 Find out whether you have ISA slots on your motherboard. ISA is the
234 name of a bus system, i.e. the way the CPU talks to the other stuff
235 inside your box. Other bus systems are PCI, EISA, MicroChannel
236 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
237 newer boards don't support it. If you have ISA, say Y, otherwise N.
238
239config ISA_DMA_API
240 bool
241 default y
242
243config ALPHA_CIA
244 bool
245 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_NORITAKE || ALPHA_MIKASA || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_ALCOR
246 default y
247
248config ALPHA_EV56
249 bool
250 default y if ALPHA_ALCOR || ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_NORITAKE || ALPHA_MIKASA || ALPHA_RAWHIDE || ALPHA_SABLE
251
252config ALPHA_T2
253 bool
254 depends on ALPHA_SABLE
255 default y
256
257config ALPHA_PYXIS
258 bool
259 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
260 default y
261
262config ALPHA_EV6
263 bool
264 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
265 default y
266
267config ALPHA_TSUNAMI
268 bool
269 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
270 default y
271
272config ALPHA_EV67
273 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
274 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
275 help
276 Is this a machine based on the EV67 core? If in doubt, select N here
277 and the machine will be treated as an EV6.
278
279config ALPHA_MCPCIA
280 bool
281 depends on ALPHA_RAWHIDE
282 default y
283
284config ALPHA_POLARIS
285 bool
286 depends on ALPHA_RX164
287 default y
288
289config ALPHA_IRONGATE
290 bool
291 depends on ALPHA_NAUTILUS
292 default y
293
294config GENERIC_HWEIGHT
295 bool
296 default y if !ALPHA_EV67
297
298config ALPHA_BROKEN_IRQ_MASK
299 bool
300 depends on ALPHA_GENERIC || ALPHA_PC164
301 default y
302
303config VGA_HOSE
304 bool
305 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
306 default y
307 help
308 Support VGA on an arbitrary hose; needed for several platforms
309 which always have multiple hoses, and whose consoles support it.
310
311
312config ALPHA_QEMU
313 bool "Run under QEMU emulation"
314 depends on !ALPHA_GENERIC
315 help
316 Assume the presence of special features supported by QEMU PALcode
317 that reduce the overhead of system emulation.
318
319 Generic kernels will auto-detect QEMU. But when building a
320 system-specific kernel, the assumption is that we want to
321 eliminate as many runtime tests as possible.
322
323 If unsure, say N.
324
325
326config ALPHA_SRM
327 bool "Use SRM as bootloader" if ALPHA_PC164 || ALPHA_TAKARA || ALPHA_ALCOR || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_NAUTILUS
328 depends on TTY
329 default y if ALPHA_MIKASA || ALPHA_SABLE || ALPHA_NORITAKE || ALPHA_DP264 || ALPHA_RAWHIDE || ALPHA_EIGER || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
330 help
331 There are two different types of booting firmware on Alphas: SRM,
332 which is command line driven, and ARC, which uses menus and arrow
333 keys. Details about the Linux/Alpha booting process are contained in
334 the Linux/Alpha FAQ, accessible on the WWW from
335 <http://www.alphalinux.org/>.
336
337 The usual way to load Linux on an Alpha machine is to use MILO
338 (a bootloader that lets you pass command line parameters to the
339 kernel just like lilo does for the x86 architecture) which can be
340 loaded either from ARC or can be installed directly as a permanent
341 firmware replacement from floppy (which requires changing a certain
342 jumper on the motherboard). If you want to do either of these, say N
343 here. If MILO doesn't work on your system (true for Jensen
344 motherboards), you can bypass it altogether and boot Linux directly
345 from an SRM console; say Y here in order to do that. Note that you
346 won't be able to boot from an IDE disk using SRM.
347
348 If unsure, say N.
349
350config ARCH_MAY_HAVE_PC_FDC
351 def_bool y
352
353config SMP
354 bool "Symmetric multi-processing support"
355 depends on ALPHA_SABLE || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
356 help
357 This enables support for systems with more than one CPU. If you have
358 a system with only one CPU, say N. If you have a system with more
359 than one CPU, say Y.
360
361 If you say N here, the kernel will run on uni- and multiprocessor
362 machines, but will use only one CPU of a multiprocessor machine. If
363 you say Y here, the kernel will run on many, but not all,
364 uniprocessor machines. On a uniprocessor machine, the kernel
365 will run faster if you say N here.
366
367 See also the SMP-HOWTO available at
368 <https://www.tldp.org/docs.html#howto>.
369
370 If you don't know what to do here, say N.
371
372config NR_CPUS
373 int "Maximum number of CPUs (2-32)"
374 range 2 32
375 depends on SMP
376 default "32" if ALPHA_GENERIC || ALPHA_MARVEL
377 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
378 help
379 MARVEL support can handle a maximum of 32 CPUs, all the others
380 with working support have a maximum of 4 CPUs.
381
382config ARCH_SPARSEMEM_ENABLE
383 bool "Sparse Memory Support"
384 help
385 Say Y to support efficient handling of discontiguous physical memory,
386 for systems that have huge holes in the physical address space.
387
388config ALPHA_WTINT
389 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
390 default y if ALPHA_QEMU
391 default n if ALPHA_EV56
392 default n if !ALPHA_SRM && !ALPHA_GENERIC
393 default y if SMP
394 help
395 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
396 to sleep until the next interrupt. This may reduce the power
397 consumed, and the heat produced by the computer. However, it has
398 the side effect of making the cycle counter unreliable as a timing
399 device across the sleep.
400
401 For emulation under QEMU, definitely say Y here, as we have other
402 mechanisms for measuring time than the cycle counter.
403
404 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
405 MILO, sleep mode is not supported so you might as well say N here.
406
407 For SMP systems we cannot use the cycle counter for timing anyway,
408 so you might as well say Y here.
409
410 If unsure, say N.
411
412# LARGE_VMALLOC is racy, if you *really* need it then fix it first
413config ALPHA_LARGE_VMALLOC
414 bool
415 help
416 Process creation and other aspects of virtual memory management can
417 be streamlined if we restrict the kernel to one PGD for all vmalloc
418 allocations. This equates to about 8GB.
419
420 Under normal circumstances, this is so far and above what is needed
421 as to be laughable. However, there are certain applications (such
422 as benchmark-grade in-kernel web serving) that can make use of as
423 much vmalloc space as is available.
424
425 Say N unless you know you need gobs and gobs of vmalloc space.
426
427config VERBOSE_MCHECK
428 bool "Verbose Machine Checks"
429
430config VERBOSE_MCHECK_ON
431 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
432 depends on VERBOSE_MCHECK
433 default 1
434 help
435 This option allows the default printing mode to be set, and then
436 possibly overridden by a boot command argument.
437
438 For example, if one wanted the option of printing verbose
439 machine checks, but wanted the default to be as if verbose
440 machine check printing was turned off, then one would choose
441 the printing mode to be 0. Then, upon reboot, one could add
442 the boot command line "verbose_mcheck=1" to get the normal
443 verbose machine check printing, or "verbose_mcheck=2" to get
444 the maximum information available.
445
446 Take the default (1) unless you want more control or more info.
447
448choice
449 prompt "Timer interrupt frequency (HZ)?"
450 default HZ_128 if ALPHA_QEMU
451 default HZ_1200 if ALPHA_RAWHIDE
452 default HZ_1024
453 help
454 The frequency at which timer interrupts occur. A high frequency
455 minimizes latency, whereas a low frequency minimizes overhead of
456 process accounting. The later effect is especially significant
457 when being run under QEMU.
458
459 Note that some Alpha hardware cannot change the interrupt frequency
460 of the timer. If unsure, say 1024 (or 1200 for Rawhide).
461
462 config HZ_32
463 bool "32 Hz"
464 config HZ_64
465 bool "64 Hz"
466 config HZ_128
467 bool "128 Hz"
468 config HZ_256
469 bool "256 Hz"
470 config HZ_1024
471 bool "1024 Hz"
472 config HZ_1200
473 bool "1200 Hz"
474endchoice
475
476config HZ
477 int
478 default 32 if HZ_32
479 default 64 if HZ_64
480 default 128 if HZ_128
481 default 256 if HZ_256
482 default 1200 if HZ_1200
483 default 1024
484
485config SRM_ENV
486 tristate "SRM environment through procfs"
487 depends on PROC_FS
488 help
489 If you enable this option, a subdirectory inside /proc called
490 /proc/srm_environment will give you access to the all important
491 SRM environment variables (those which have a name) and also
492 to all others (by their internal number).
493
494 SRM is something like a BIOS for Alpha machines. There are some
495 other such BIOSes, like AlphaBIOS, which this driver cannot
496 support (hey, that's not SRM!).
497
498 Despite the fact that this driver doesn't work on all Alphas (but
499 only on those which have SRM as their firmware), it's save to
500 build it even if your particular machine doesn't know about SRM
501 (or if you intend to compile a generic kernel). It will simply
502 not create those subdirectory in /proc (and give you some warning,
503 of course).
504
505 This driver is also available as a module and will be called
506 srm_env then.
507
508endmenu
509
510# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
511# but we also need it if VGA_HOSE is set
512config DUMMY_CONSOLE
513 bool
514 depends on VGA_HOSE
515 default y