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TOMOYO Linux Cross Reference
Linux/arch/alpha/Kconfig

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  1 # SPDX-License-Identifier: GPL-2.0
  2 config 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 
 48 config 64BIT
 49         def_bool y
 50 
 51 config MMU
 52         bool
 53         default y
 54 
 55 config ARCH_HAS_ILOG2_U32
 56         bool
 57         default n
 58 
 59 config ARCH_HAS_ILOG2_U64
 60         bool
 61         default n
 62 
 63 config GENERIC_CALIBRATE_DELAY
 64         bool
 65         default y
 66 
 67 config GENERIC_ISA_DMA
 68         bool
 69         default y
 70 
 71 config PGTABLE_LEVELS
 72         int
 73         default 3
 74 
 75 config AUDIT_ARCH
 76         bool
 77 
 78 menu "System setup"
 79 
 80 choice
 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 
111 config 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 
118 config 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 
129 config 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 
136 config 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 
142 config 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 
148 config ALPHA_MARVEL
149         bool "Marvel"
150         help
151           AlphaServer ES47 / ES80 / GS1280 based on EV7.
152 
153 config 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 
160 config ALPHA_MIKASA
161         bool "Mikasa"
162         help
163           AlphaServer 1000-based Alpha systems.
164 
165 config ALPHA_NAUTILUS
166         bool "Nautilus"
167         help
168           Alpha systems based on the AMD 751 & ALI 1543C chipsets.
169 
170 config ALPHA_NORITAKE
171         bool "Noritake"
172         select HAVE_EISA
173         help
174           AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
175           systems.
176 
177 config ALPHA_PC164
178         bool "PC164"
179 
180 config 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 
188 config 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 
194 config ALPHA_RX164
195         bool "RX164"
196 
197 config ALPHA_SX164
198         bool "SX164"
199 
200 config ALPHA_SABLE
201         bool "Sable"
202         select HAVE_EISA
203         help
204           Digital AlphaServer 2000 and 2100-based systems.
205 
206 config ALPHA_SHARK
207         bool "Shark"
208 
209 config ALPHA_TAKARA
210         bool "Takara"
211         help
212           Alpha 11164-based OEM single-board computer.
213 
214 config ALPHA_TITAN
215         bool "Titan"
216         help
217           AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
218 
219 config ALPHA_WILDFIRE
220         bool "Wildfire"
221         help
222           AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
223 
224 endchoice
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.
229 config 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 
239 config ISA_DMA_API
240         bool
241         default y
242 
243 config 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 
248 config 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 
252 config ALPHA_T2
253         bool
254         depends on ALPHA_SABLE
255         default y
256 
257 config ALPHA_PYXIS
258         bool
259         depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
260         default y
261 
262 config 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 
267 config ALPHA_TSUNAMI
268         bool
269         depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
270         default y
271 
272 config 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 
279 config ALPHA_MCPCIA
280         bool
281         depends on ALPHA_RAWHIDE
282         default y
283 
284 config ALPHA_POLARIS
285         bool
286         depends on ALPHA_RX164
287         default y
288 
289 config ALPHA_IRONGATE
290         bool
291         depends on ALPHA_NAUTILUS
292         default y
293 
294 config GENERIC_HWEIGHT
295         bool
296         default y if !ALPHA_EV67
297 
298 config ALPHA_BROKEN_IRQ_MASK
299         bool
300         depends on ALPHA_GENERIC || ALPHA_PC164
301         default y
302 
303 config 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 
312 config 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 
326 config 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 
350 config ARCH_MAY_HAVE_PC_FDC
351         def_bool y
352 
353 config 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 
372 config 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 
382 config 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 
388 config 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
413 config 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 
427 config VERBOSE_MCHECK
428         bool "Verbose Machine Checks"
429 
430 config 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 
448 choice
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"
474 endchoice
475 
476 config 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 
485 config 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 
508 endmenu
509 
510 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
511 # but we also need it if VGA_HOSE is set
512 config DUMMY_CONSOLE
513         bool
514         depends on VGA_HOSE
515         default y

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