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