1 # SPDX-License-Identifier: GPL-2.0
5 select ARCH_MIGHT_HAVE_PC_PARPORT
6 select ARCH_MIGHT_HAVE_PC_SERIO
8 select ARCH_NO_SG_CHAIN
9 select ARCH_USE_CMPXCHG_LOCKREF
10 select FORCE_PCI if !ALPHA_JENSEN
11 select PCI_DOMAINS if PCI
12 select PCI_SYSCALL if PCI
16 select HAVE_PCSPKR_PLATFORM
17 select HAVE_PERF_EVENTS
18 select NEED_DMA_MAP_STATE
19 select NEED_SG_DMA_LENGTH
21 select GENERIC_IRQ_PROBE
22 select GENERIC_PCI_IOMAP if PCI
23 select AUTO_IRQ_AFFINITY if SMP
24 select GENERIC_IRQ_SHOW
25 select ARCH_WANT_IPC_PARSE_VERSION
26 select ARCH_HAVE_NMI_SAFE_CMPXCHG
28 select GENERIC_CLOCKEVENTS
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 The Alpha is a 64-bit general-purpose processor designed and
42 marketed by the Digital Equipment Corporation of blessed memory,
43 now Hewlett-Packard. The Alpha Linux project has a home page at
44 <http://www.alphalinux.org/>.
53 config ARCH_HAS_ILOG2_U32
57 config ARCH_HAS_ILOG2_U64
61 config GENERIC_CALIBRATE_DELAY
69 config GENERIC_ISA_DMA
83 prompt "Alpha system type"
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.
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:
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
107 Miata Personal Workstation 433/500/600 a/au
108 Marvel AlphaServer ES47 / ES80 / GS1280
110 Noname AXPpci33, UDB (Multia)
111 Noritake AS 1000A, AS 600A, AS 800
113 Rawhide AS 1200, AS 4000, AS 4100
114 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
116 Sable AS 2000, AS 2100
119 Titan AlphaServer ES45 / DS25 / DS15
120 Wildfire AlphaServer GS 40/80/160/320
122 If you don't know what to do, choose "generic".
129 A generic kernel will run on all supported Alpha hardware.
132 bool "Alcor/Alpha-XLT"
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.
145 XL-233 and XL-266-based Alpha systems.
150 Dec AlphaBook1/Burns Alpha-based laptops.
152 config ALPHA_AVANTI_CH
155 config ALPHA_CABRIOLET
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.
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.
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.
180 config ALPHA_EB64P_CH
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
195 Later variant of the EB66 board.
200 Apparently an obscure OEM single-board computer based on the
201 Typhoon/Tsunami chipset family. Information on it is scanty.
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
218 A technical overview of this board is available at
219 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
225 AlphaServer 2100A-based systems.
230 AlphaServer ES47 / ES80 / GS1280 based on EV7.
236 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
242 AlphaServer 1000-based Alpha systems.
244 config ALPHA_NAUTILUS
247 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
249 config ALPHA_NONAME_CH
252 config ALPHA_NORITAKE
256 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
269 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
271 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
276 Samsung APC164UX. There is a page on known problems and workarounds
277 at <http://www.alphalinux.org/faq/FAQ-11.html>.
289 Digital AlphaServer 2000 and 2100-based systems.
297 Alpha 11164-based OEM single-board computer.
302 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
304 config ALPHA_WILDFIRE
307 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
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.
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.
330 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
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
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
348 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
353 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
358 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
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.
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
374 default y if ALPHA_LYNX && !ALPHA_EV5
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
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
386 prompt "EV56 CPU (speed >= 333MHz)?"
387 depends on ALPHA_NORITAKE || ALPHA_PRIMO
390 prompt "EV56 CPU (speed >= 400MHz)?"
391 depends on ALPHA_RAWHIDE
394 bool "EV5 CPU daughtercard (model 5/xxx)?"
395 depends on ALPHA_NORITAKE || ALPHA_MIKASA
397 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
400 bool "EV5 CPU(s) (model 5/xxx)?"
401 depends on ALPHA_SABLE
403 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
407 depends on ALPHA_LYNX
412 depends on ALPHA_SABLE || ALPHA_LYNX
417 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
422 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
427 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
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
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.
439 depends on ALPHA_RAWHIDE
444 depends on ALPHA_RX164
447 config ALPHA_IRONGATE
449 depends on ALPHA_NAUTILUS
452 config GENERIC_HWEIGHT
454 default y if !ALPHA_EV67
458 depends on ALPHA_XL || ALPHA_AVANTI_CH
461 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
463 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
465 config ALPHA_BROKEN_IRQ_MASK
467 depends on ALPHA_GENERIC || ALPHA_PC164
472 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
475 Support VGA on an arbitrary hose; needed for several platforms
476 which always have multiple hoses, and whose consoles support it.
480 bool "Run under QEMU emulation"
481 depends on !ALPHA_GENERIC
483 Assume the presence of special features supported by QEMU PALcode
484 that reduce the overhead of system emulation.
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.
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
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
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/>.
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.
517 config ARCH_MAY_HAVE_PC_FDC
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
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
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.
534 See also the SMP-HOWTO available at
535 <http://www.tldp.org/docs.html#howto>.
537 If you don't know what to do here, say N.
540 int "Maximum number of CPUs (2-32)"
543 default "32" if ALPHA_GENERIC || ALPHA_MARVEL
544 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
546 MARVEL support can handle a maximum of 32 CPUs, all the others
547 with working support have a maximum of 4 CPUs.
549 config ARCH_DISCONTIGMEM_ENABLE
550 bool "Discontiguous Memory Support"
552 Say Y to support efficient handling of discontiguous physical memory,
553 for architectures which are either NUMA (Non-Uniform Memory Access)
554 or have huge holes in the physical address space for other reasons.
555 See <file:Documentation/vm/numa.rst> for more.
558 bool "NUMA Support (EXPERIMENTAL)"
559 depends on DISCONTIGMEM && BROKEN
561 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
562 Access). This option is for configuring high-end multiprocessor
563 server machines. If in doubt, say N.
566 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
567 default y if ALPHA_QEMU
568 default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
569 default n if !ALPHA_SRM && !ALPHA_GENERIC
572 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
573 to sleep until the next interrupt. This may reduce the power
574 consumed, and the heat produced by the computer. However, it has
575 the side effect of making the cycle counter unreliable as a timing
576 device across the sleep.
578 For emulation under QEMU, definitely say Y here, as we have other
579 mechanisms for measuring time than the cycle counter.
581 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
582 MILO, sleep mode is not supported so you might as well say N here.
584 For SMP systems we cannot use the cycle counter for timing anyway,
585 so you might as well say Y here.
592 depends on NEED_MULTIPLE_NODES
594 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
595 config ALPHA_LARGE_VMALLOC
598 Process creation and other aspects of virtual memory management can
599 be streamlined if we restrict the kernel to one PGD for all vmalloc
600 allocations. This equates to about 8GB.
602 Under normal circumstances, this is so far and above what is needed
603 as to be laughable. However, there are certain applications (such
604 as benchmark-grade in-kernel web serving) that can make use of as
605 much vmalloc space as is available.
607 Say N unless you know you need gobs and gobs of vmalloc space.
609 config VERBOSE_MCHECK
610 bool "Verbose Machine Checks"
612 config VERBOSE_MCHECK_ON
613 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
614 depends on VERBOSE_MCHECK
617 This option allows the default printing mode to be set, and then
618 possibly overridden by a boot command argument.
620 For example, if one wanted the option of printing verbose
621 machine checks, but wanted the default to be as if verbose
622 machine check printing was turned off, then one would choose
623 the printing mode to be 0. Then, upon reboot, one could add
624 the boot command line "verbose_mcheck=1" to get the normal
625 verbose machine check printing, or "verbose_mcheck=2" to get
626 the maximum information available.
628 Take the default (1) unless you want more control or more info.
631 prompt "Timer interrupt frequency (HZ)?"
632 default HZ_128 if ALPHA_QEMU
633 default HZ_1200 if ALPHA_RAWHIDE
636 The frequency at which timer interrupts occur. A high frequency
637 minimizes latency, whereas a low frequency minimizes overhead of
638 process accounting. The later effect is especially significant
639 when being run under QEMU.
641 Note that some Alpha hardware cannot change the interrupt frequency
642 of the timer. If unsure, say 1024 (or 1200 for Rawhide).
662 default 128 if HZ_128
663 default 256 if HZ_256
664 default 1200 if HZ_1200
668 tristate "SRM environment through procfs"
671 If you enable this option, a subdirectory inside /proc called
672 /proc/srm_environment will give you access to the all important
673 SRM environment variables (those which have a name) and also
674 to all others (by their internal number).
676 SRM is something like a BIOS for Alpha machines. There are some
677 other such BIOSes, like AlphaBIOS, which this driver cannot
678 support (hey, that's not SRM!).
680 Despite the fact that this driver doesn't work on all Alphas (but
681 only on those which have SRM as their firmware), it's save to
682 build it even if your particular machine doesn't know about SRM
683 (or if you intend to compile a generic kernel). It will simply
684 not create those subdirectory in /proc (and give you some warning,
687 This driver is also available as a module and will be called
692 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
693 # but we also need it if VGA_HOSE is set