1 # SPDX-License-Identifier: GPL-2.0
5 select ARCH_32BIT_USTAT_F_TINODE
6 select ARCH_HAS_CURRENT_STACK_POINTER
7 select ARCH_MIGHT_HAVE_PC_PARPORT
8 select ARCH_MIGHT_HAVE_PC_SERIO
10 select ARCH_NO_SG_CHAIN
11 select ARCH_USE_CMPXCHG_LOCKREF
13 select FORCE_PCI if !ALPHA_JENSEN
14 select PCI_DOMAINS if PCI
15 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
21 select GENERIC_IRQ_PROBE
22 select GENERIC_PCI_IOMAP
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_CPU_VULNERABILITIES
29 select GENERIC_SMP_IDLE_THREAD
31 select HAVE_ARCH_AUDITSYSCALL
32 select HAVE_MOD_ARCH_SPECIFIC
33 select MODULES_USE_ELF_RELA
34 select ODD_RT_SIGACTION
36 select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
37 select MMU_GATHER_NO_RANGE
38 select SPARSEMEM_EXTREME if SPARSEMEM
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
65 config GENERIC_ISA_DMA
79 prompt "Alpha system type"
82 This is the system type of your hardware. A "generic" kernel will
83 run on any supported Alpha system. However, if you configure a
84 kernel for your specific system, it will be faster and smaller.
86 To find out what type of Alpha system you have, you may want to
87 check out the Linux/Alpha FAQ, accessible on the WWW from
88 <http://www.alphalinux.org/>. In summary:
90 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
91 Alpha-XL XL-233, XL-266
92 AlphaBook1 Alpha laptop
93 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
94 Cabriolet AlphaPC64, AlphaPCI64
95 DP264 DP264 / DS20 / ES40 / DS10 / DS10L
96 EB164 EB164 21164 evaluation board
97 EB64+ EB64+ 21064 evaluation board
98 EB66 EB66 21066 evaluation board
99 EB66+ EB66+ 21066 evaluation board
100 Jensen DECpc 150, DEC 2000 models 300, 500
103 Miata Personal Workstation 433/500/600 a/au
104 Marvel AlphaServer ES47 / ES80 / GS1280
106 Noname AXPpci33, UDB (Multia)
107 Noritake AS 1000A, AS 600A, AS 800
109 Rawhide AS 1200, AS 4000, AS 4100
110 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
112 Sable AS 2000, AS 2100
115 Titan AlphaServer ES45 / DS25 / DS15
116 Wildfire AlphaServer GS 40/80/160/320
118 If you don't know what to do, choose "generic".
125 A generic kernel will run on all supported Alpha hardware.
128 bool "Alcor/Alpha-XLT"
131 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
132 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
133 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
134 controller (256-bit memory bus) and a PCI interface. It also does
135 all the work required to support an external Bcache and to maintain
136 memory coherence when a PCI device DMAs into (or out of) memory.
141 XL-233 and XL-266-based Alpha systems.
146 Dec AlphaBook1/Burns Alpha-based laptops.
148 config ALPHA_AVANTI_CH
151 config ALPHA_CABRIOLET
154 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now
155 baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
156 slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
157 Bcache SIMMs. Requires power supply with 3.3V output.
162 Various 21264 systems with the tsunami core logic chipset.
163 API Networks: 264DP, UP2000(+), CS20;
164 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
169 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has
170 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
171 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in
172 Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
173 MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized
174 motherboard. Requires power supply with 3.3V output.
176 config ALPHA_EB64P_CH
182 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is
183 identical to EB64+. Baby PC-AT size. Runs from standard PC power
184 supply. The EB66 schematic was published as a marketing poster
185 advertising the 21066 as "the first microprocessor in the world with
191 Later variant of the EB66 board.
196 Apparently an obscure OEM single-board computer based on the
197 Typhoon/Tsunami chipset family. Information on it is scanty.
203 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
204 of the first-generation Alpha systems. A number of these systems
205 seem to be available on the second- hand market. The Jensen is a
206 floor-standing tower system which originally used a 150MHz 21064 It
207 used programmable logic to interface a 486 EISA I/O bridge to the
213 A technical overview of this board is available at
214 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
220 AlphaServer 2100A-based systems.
225 AlphaServer ES47 / ES80 / GS1280 based on EV7.
231 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
237 AlphaServer 1000-based Alpha systems.
239 config ALPHA_NAUTILUS
242 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
244 config ALPHA_NONAME_CH
247 config ALPHA_NORITAKE
251 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
264 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
266 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
271 Samsung APC164UX. There is a page on known problems and workarounds
272 at <http://www.alphalinux.org/faq/FAQ-11.html>.
284 Digital AlphaServer 2000 and 2100-based systems.
292 Alpha 11164-based OEM single-board computer.
297 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
299 config ALPHA_WILDFIRE
302 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
306 # clear all implied options (don't want default values for those):
307 # Most of these machines have ISA slots; not exactly sure which don't,
308 # and this doesn't activate hordes of code, so do it always.
313 Find out whether you have ISA slots on your motherboard. ISA is the
314 name of a bus system, i.e. the way the CPU talks to the other stuff
315 inside your box. Other bus systems are PCI, EISA, MicroChannel
316 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
317 newer boards don't support it. If you have ISA, say Y, otherwise N.
325 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
328 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
329 UDB). This design was produced by Digital's Technical OEM (TOEM)
330 group. It uses the 21066 processor running at 166MHz or 233MHz. It
331 is a baby-AT size, and runs from a standard PC power supply. It has
332 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
333 2 versions, with either PS/2 or large DIN connectors for the
338 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
339 default y if !ALPHA_LYNX
343 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
348 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
353 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
356 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA,
357 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
358 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
359 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
360 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size.
361 Runs from standard PC power supply.
364 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
365 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
369 default y if ALPHA_LYNX && !ALPHA_EV5
373 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
377 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
378 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
381 prompt "EV56 CPU (speed >= 333MHz)?"
382 depends on ALPHA_NORITAKE || ALPHA_PRIMO
385 prompt "EV56 CPU (speed >= 400MHz)?"
386 depends on ALPHA_RAWHIDE
389 bool "EV5 CPU daughtercard (model 5/xxx)?"
390 depends on ALPHA_NORITAKE || ALPHA_MIKASA
392 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
395 bool "EV5 CPU(s) (model 5/xxx)?"
396 depends on ALPHA_SABLE
398 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
402 depends on ALPHA_LYNX
407 depends on ALPHA_SABLE || ALPHA_LYNX
412 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
417 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
422 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
426 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
427 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
429 Is this a machine based on the EV67 core? If in doubt, select N here
430 and the machine will be treated as an EV6.
434 depends on ALPHA_RAWHIDE
439 depends on ALPHA_RX164
442 config ALPHA_IRONGATE
444 depends on ALPHA_NAUTILUS
447 config GENERIC_HWEIGHT
449 default y if !ALPHA_EV67
453 depends on ALPHA_XL || ALPHA_AVANTI_CH
456 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
458 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
460 config ALPHA_BROKEN_IRQ_MASK
462 depends on ALPHA_GENERIC || ALPHA_PC164
467 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
470 Support VGA on an arbitrary hose; needed for several platforms
471 which always have multiple hoses, and whose consoles support it.
475 bool "Run under QEMU emulation"
476 depends on !ALPHA_GENERIC
478 Assume the presence of special features supported by QEMU PALcode
479 that reduce the overhead of system emulation.
481 Generic kernels will auto-detect QEMU. But when building a
482 system-specific kernel, the assumption is that we want to
483 eliminate as many runtime tests as possible.
489 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
491 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
493 There are two different types of booting firmware on Alphas: SRM,
494 which is command line driven, and ARC, which uses menus and arrow
495 keys. Details about the Linux/Alpha booting process are contained in
496 the Linux/Alpha FAQ, accessible on the WWW from
497 <http://www.alphalinux.org/>.
499 The usual way to load Linux on an Alpha machine is to use MILO
500 (a bootloader that lets you pass command line parameters to the
501 kernel just like lilo does for the x86 architecture) which can be
502 loaded either from ARC or can be installed directly as a permanent
503 firmware replacement from floppy (which requires changing a certain
504 jumper on the motherboard). If you want to do either of these, say N
505 here. If MILO doesn't work on your system (true for Jensen
506 motherboards), you can bypass it altogether and boot Linux directly
507 from an SRM console; say Y here in order to do that. Note that you
508 won't be able to boot from an IDE disk using SRM.
512 config ARCH_MAY_HAVE_PC_FDC
516 bool "Symmetric multi-processing support"
517 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
519 This enables support for systems with more than one CPU. If you have
520 a system with only one CPU, say N. If you have a system with more
523 If you say N here, the kernel will run on uni- and multiprocessor
524 machines, but will use only one CPU of a multiprocessor machine. If
525 you say Y here, the kernel will run on many, but not all,
526 uniprocessor machines. On a uniprocessor machine, the kernel
527 will run faster if you say N here.
529 See also the SMP-HOWTO available at
530 <https://www.tldp.org/docs.html#howto>.
532 If you don't know what to do here, say N.
535 int "Maximum number of CPUs (2-32)"
538 default "32" if ALPHA_GENERIC || ALPHA_MARVEL
539 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
541 MARVEL support can handle a maximum of 32 CPUs, all the others
542 with working support have a maximum of 4 CPUs.
544 config ARCH_SPARSEMEM_ENABLE
545 bool "Sparse Memory Support"
547 Say Y to support efficient handling of discontiguous physical memory,
548 for systems that have huge holes in the physical address space.
551 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
552 default y if ALPHA_QEMU
553 default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
554 default n if !ALPHA_SRM && !ALPHA_GENERIC
557 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
558 to sleep until the next interrupt. This may reduce the power
559 consumed, and the heat produced by the computer. However, it has
560 the side effect of making the cycle counter unreliable as a timing
561 device across the sleep.
563 For emulation under QEMU, definitely say Y here, as we have other
564 mechanisms for measuring time than the cycle counter.
566 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
567 MILO, sleep mode is not supported so you might as well say N here.
569 For SMP systems we cannot use the cycle counter for timing anyway,
570 so you might as well say Y here.
574 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
575 config ALPHA_LARGE_VMALLOC
578 Process creation and other aspects of virtual memory management can
579 be streamlined if we restrict the kernel to one PGD for all vmalloc
580 allocations. This equates to about 8GB.
582 Under normal circumstances, this is so far and above what is needed
583 as to be laughable. However, there are certain applications (such
584 as benchmark-grade in-kernel web serving) that can make use of as
585 much vmalloc space as is available.
587 Say N unless you know you need gobs and gobs of vmalloc space.
589 config VERBOSE_MCHECK
590 bool "Verbose Machine Checks"
592 config VERBOSE_MCHECK_ON
593 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
594 depends on VERBOSE_MCHECK
597 This option allows the default printing mode to be set, and then
598 possibly overridden by a boot command argument.
600 For example, if one wanted the option of printing verbose
601 machine checks, but wanted the default to be as if verbose
602 machine check printing was turned off, then one would choose
603 the printing mode to be 0. Then, upon reboot, one could add
604 the boot command line "verbose_mcheck=1" to get the normal
605 verbose machine check printing, or "verbose_mcheck=2" to get
606 the maximum information available.
608 Take the default (1) unless you want more control or more info.
611 prompt "Timer interrupt frequency (HZ)?"
612 default HZ_128 if ALPHA_QEMU
613 default HZ_1200 if ALPHA_RAWHIDE
616 The frequency at which timer interrupts occur. A high frequency
617 minimizes latency, whereas a low frequency minimizes overhead of
618 process accounting. The later effect is especially significant
619 when being run under QEMU.
621 Note that some Alpha hardware cannot change the interrupt frequency
622 of the timer. If unsure, say 1024 (or 1200 for Rawhide).
642 default 128 if HZ_128
643 default 256 if HZ_256
644 default 1200 if HZ_1200
648 tristate "SRM environment through procfs"
651 If you enable this option, a subdirectory inside /proc called
652 /proc/srm_environment will give you access to the all important
653 SRM environment variables (those which have a name) and also
654 to all others (by their internal number).
656 SRM is something like a BIOS for Alpha machines. There are some
657 other such BIOSes, like AlphaBIOS, which this driver cannot
658 support (hey, that's not SRM!).
660 Despite the fact that this driver doesn't work on all Alphas (but
661 only on those which have SRM as their firmware), it's save to
662 build it even if your particular machine doesn't know about SRM
663 (or if you intend to compile a generic kernel). It will simply
664 not create those subdirectory in /proc (and give you some warning,
667 This driver is also available as a module and will be called
672 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
673 # but we also need it if VGA_HOSE is set