1 # SPDX-License-Identifier: GPL-2.0
5 select ARCH_32BIT_USTAT_F_TINODE
6 select ARCH_MIGHT_HAVE_PC_PARPORT
7 select ARCH_MIGHT_HAVE_PC_SERIO
9 select ARCH_NO_SG_CHAIN
10 select ARCH_USE_CMPXCHG_LOCKREF
12 select FORCE_PCI if !ALPHA_JENSEN
13 select PCI_DOMAINS if PCI
14 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
22 select GENERIC_IRQ_PROBE
23 select GENERIC_PCI_IOMAP if PCI
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
29 select GENERIC_CPU_VULNERABILITIES
30 select GENERIC_SMP_IDLE_THREAD
31 select GENERIC_STRNCPY_FROM_USER
32 select GENERIC_STRNLEN_USER
33 select HAVE_ARCH_AUDITSYSCALL
34 select HAVE_MOD_ARCH_SPECIFIC
35 select MODULES_USE_ELF_RELA
36 select ODD_RT_SIGACTION
38 select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
39 select MMU_GATHER_NO_RANGE
41 select SPARSEMEM_EXTREME if SPARSEMEM
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/>.
56 config ARCH_HAS_ILOG2_U32
60 config ARCH_HAS_ILOG2_U64
64 config GENERIC_CALIBRATE_DELAY
68 config GENERIC_ISA_DMA
82 prompt "Alpha system type"
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.
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:
93 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
94 Alpha-XL XL-233, XL-266
95 AlphaBook1 Alpha laptop
96 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
97 Cabriolet AlphaPC64, AlphaPCI64
98 DP264 DP264 / DS20 / ES40 / DS10 / DS10L
99 EB164 EB164 21164 evaluation board
100 EB64+ EB64+ 21064 evaluation board
101 EB66 EB66 21066 evaluation board
102 EB66+ EB66+ 21066 evaluation board
103 Jensen DECpc 150, DEC 2000 models 300, 500
106 Miata Personal Workstation 433/500/600 a/au
107 Marvel AlphaServer ES47 / ES80 / GS1280
109 Noname AXPpci33, UDB (Multia)
110 Noritake AS 1000A, AS 600A, AS 800
112 Rawhide AS 1200, AS 4000, AS 4100
113 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
115 Sable AS 2000, AS 2100
118 Titan AlphaServer ES45 / DS25 / DS15
119 Wildfire AlphaServer GS 40/80/160/320
121 If you don't know what to do, choose "generic".
128 A generic kernel will run on all supported Alpha hardware.
131 bool "Alcor/Alpha-XLT"
134 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
135 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
136 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
137 controller (256-bit memory bus) and a PCI interface. It also does
138 all the work required to support an external Bcache and to maintain
139 memory coherence when a PCI device DMAs into (or out of) memory.
144 XL-233 and XL-266-based Alpha systems.
149 Dec AlphaBook1/Burns Alpha-based laptops.
151 config ALPHA_AVANTI_CH
154 config ALPHA_CABRIOLET
157 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now
158 baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
159 slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
160 Bcache SIMMs. Requires power supply with 3.3V output.
165 Various 21264 systems with the tsunami core logic chipset.
166 API Networks: 264DP, UP2000(+), CS20;
167 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
172 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has
173 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
174 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in
175 Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
176 MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized
177 motherboard. Requires power supply with 3.3V output.
179 config ALPHA_EB64P_CH
185 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is
186 identical to EB64+. Baby PC-AT size. Runs from standard PC power
187 supply. The EB66 schematic was published as a marketing poster
188 advertising the 21066 as "the first microprocessor in the world with
194 Later variant of the EB66 board.
199 Apparently an obscure OEM single-board computer based on the
200 Typhoon/Tsunami chipset family. Information on it is scanty.
207 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
208 of the first-generation Alpha systems. A number of these systems
209 seem to be available on the second- hand market. The Jensen is a
210 floor-standing tower system which originally used a 150MHz 21064 It
211 used programmable logic to interface a 486 EISA I/O bridge to the
217 A technical overview of this board is available at
218 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
224 AlphaServer 2100A-based systems.
229 AlphaServer ES47 / ES80 / GS1280 based on EV7.
235 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
241 AlphaServer 1000-based Alpha systems.
243 config ALPHA_NAUTILUS
246 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
248 config ALPHA_NONAME_CH
251 config ALPHA_NORITAKE
255 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
268 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
270 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
275 Samsung APC164UX. There is a page on known problems and workarounds
276 at <http://www.alphalinux.org/faq/FAQ-11.html>.
288 Digital AlphaServer 2000 and 2100-based systems.
296 Alpha 11164-based OEM single-board computer.
301 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
303 config ALPHA_WILDFIRE
306 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
310 # clear all implied options (don't want default values for those):
311 # Most of these machines have ISA slots; not exactly sure which don't,
312 # and this doesn't activate hordes of code, so do it always.
317 Find out whether you have ISA slots on your motherboard. ISA is the
318 name of a bus system, i.e. the way the CPU talks to the other stuff
319 inside your box. Other bus systems are PCI, EISA, MicroChannel
320 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
321 newer boards don't support it. If you have ISA, say Y, otherwise N.
329 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
332 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
333 UDB). This design was produced by Digital's Technical OEM (TOEM)
334 group. It uses the 21066 processor running at 166MHz or 233MHz. It
335 is a baby-AT size, and runs from a standard PC power supply. It has
336 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
337 2 versions, with either PS/2 or large DIN connectors for the
342 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
343 default y if !ALPHA_LYNX
347 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
352 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
357 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
360 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA,
361 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
362 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
363 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
364 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size.
365 Runs from standard PC power supply.
368 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
369 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
373 default y if ALPHA_LYNX && !ALPHA_EV5
377 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
381 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
382 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
385 prompt "EV56 CPU (speed >= 333MHz)?"
386 depends on ALPHA_NORITAKE || ALPHA_PRIMO
389 prompt "EV56 CPU (speed >= 400MHz)?"
390 depends on ALPHA_RAWHIDE
393 bool "EV5 CPU daughtercard (model 5/xxx)?"
394 depends on ALPHA_NORITAKE || ALPHA_MIKASA
396 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
399 bool "EV5 CPU(s) (model 5/xxx)?"
400 depends on ALPHA_SABLE
402 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
406 depends on ALPHA_LYNX
411 depends on ALPHA_SABLE || ALPHA_LYNX
416 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
421 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
426 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
430 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
431 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
433 Is this a machine based on the EV67 core? If in doubt, select N here
434 and the machine will be treated as an EV6.
438 depends on ALPHA_RAWHIDE
443 depends on ALPHA_RX164
446 config ALPHA_IRONGATE
448 depends on ALPHA_NAUTILUS
451 config GENERIC_HWEIGHT
453 default y if !ALPHA_EV67
457 depends on ALPHA_XL || ALPHA_AVANTI_CH
460 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
462 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
464 config ALPHA_BROKEN_IRQ_MASK
466 depends on ALPHA_GENERIC || ALPHA_PC164
471 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
474 Support VGA on an arbitrary hose; needed for several platforms
475 which always have multiple hoses, and whose consoles support it.
479 bool "Run under QEMU emulation"
480 depends on !ALPHA_GENERIC
482 Assume the presence of special features supported by QEMU PALcode
483 that reduce the overhead of system emulation.
485 Generic kernels will auto-detect QEMU. But when building a
486 system-specific kernel, the assumption is that we want to
487 eliminate as many runtime tests as possible.
493 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 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 There are two different types of booting firmware on Alphas: SRM,
498 which is command line driven, and ARC, which uses menus and arrow
499 keys. Details about the Linux/Alpha booting process are contained in
500 the Linux/Alpha FAQ, accessible on the WWW from
501 <http://www.alphalinux.org/>.
503 The usual way to load Linux on an Alpha machine is to use MILO
504 (a bootloader that lets you pass command line parameters to the
505 kernel just like lilo does for the x86 architecture) which can be
506 loaded either from ARC or can be installed directly as a permanent
507 firmware replacement from floppy (which requires changing a certain
508 jumper on the motherboard). If you want to do either of these, say N
509 here. If MILO doesn't work on your system (true for Jensen
510 motherboards), you can bypass it altogether and boot Linux directly
511 from an SRM console; say Y here in order to do that. Note that you
512 won't be able to boot from an IDE disk using SRM.
516 config ARCH_MAY_HAVE_PC_FDC
520 bool "Symmetric multi-processing support"
521 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
523 This enables support for systems with more than one CPU. If you have
524 a system with only one CPU, say N. If you have a system with more
527 If you say N here, the kernel will run on uni- and multiprocessor
528 machines, but will use only one CPU of a multiprocessor machine. If
529 you say Y here, the kernel will run on many, but not all,
530 uniprocessor machines. On a uniprocessor machine, the kernel
531 will run faster if you say N here.
533 See also the SMP-HOWTO available at
534 <https://www.tldp.org/docs.html#howto>.
536 If you don't know what to do here, say N.
539 int "Maximum number of CPUs (2-32)"
542 default "32" if ALPHA_GENERIC || ALPHA_MARVEL
543 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
545 MARVEL support can handle a maximum of 32 CPUs, all the others
546 with working support have a maximum of 4 CPUs.
548 config ARCH_SPARSEMEM_ENABLE
549 bool "Sparse Memory Support"
551 Say Y to support efficient handling of discontiguous physical memory,
552 for systems that have huge holes in the physical address space.
555 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
556 default y if ALPHA_QEMU
557 default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
558 default n if !ALPHA_SRM && !ALPHA_GENERIC
561 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
562 to sleep until the next interrupt. This may reduce the power
563 consumed, and the heat produced by the computer. However, it has
564 the side effect of making the cycle counter unreliable as a timing
565 device across the sleep.
567 For emulation under QEMU, definitely say Y here, as we have other
568 mechanisms for measuring time than the cycle counter.
570 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
571 MILO, sleep mode is not supported so you might as well say N here.
573 For SMP systems we cannot use the cycle counter for timing anyway,
574 so you might as well say Y here.
578 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
579 config ALPHA_LARGE_VMALLOC
582 Process creation and other aspects of virtual memory management can
583 be streamlined if we restrict the kernel to one PGD for all vmalloc
584 allocations. This equates to about 8GB.
586 Under normal circumstances, this is so far and above what is needed
587 as to be laughable. However, there are certain applications (such
588 as benchmark-grade in-kernel web serving) that can make use of as
589 much vmalloc space as is available.
591 Say N unless you know you need gobs and gobs of vmalloc space.
593 config VERBOSE_MCHECK
594 bool "Verbose Machine Checks"
596 config VERBOSE_MCHECK_ON
597 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
598 depends on VERBOSE_MCHECK
601 This option allows the default printing mode to be set, and then
602 possibly overridden by a boot command argument.
604 For example, if one wanted the option of printing verbose
605 machine checks, but wanted the default to be as if verbose
606 machine check printing was turned off, then one would choose
607 the printing mode to be 0. Then, upon reboot, one could add
608 the boot command line "verbose_mcheck=1" to get the normal
609 verbose machine check printing, or "verbose_mcheck=2" to get
610 the maximum information available.
612 Take the default (1) unless you want more control or more info.
615 prompt "Timer interrupt frequency (HZ)?"
616 default HZ_128 if ALPHA_QEMU
617 default HZ_1200 if ALPHA_RAWHIDE
620 The frequency at which timer interrupts occur. A high frequency
621 minimizes latency, whereas a low frequency minimizes overhead of
622 process accounting. The later effect is especially significant
623 when being run under QEMU.
625 Note that some Alpha hardware cannot change the interrupt frequency
626 of the timer. If unsure, say 1024 (or 1200 for Rawhide).
646 default 128 if HZ_128
647 default 256 if HZ_256
648 default 1200 if HZ_1200
652 tristate "SRM environment through procfs"
655 If you enable this option, a subdirectory inside /proc called
656 /proc/srm_environment will give you access to the all important
657 SRM environment variables (those which have a name) and also
658 to all others (by their internal number).
660 SRM is something like a BIOS for Alpha machines. There are some
661 other such BIOSes, like AlphaBIOS, which this driver cannot
662 support (hey, that's not SRM!).
664 Despite the fact that this driver doesn't work on all Alphas (but
665 only on those which have SRM as their firmware), it's save to
666 build it even if your particular machine doesn't know about SRM
667 (or if you intend to compile a generic kernel). It will simply
668 not create those subdirectory in /proc (and give you some warning,
671 This driver is also available as a module and will be called
676 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
677 # but we also need it if VGA_HOSE is set