1# SPDX-License-Identifier: GPL-2.0 2config ALPHA 3 bool 4 default y 5 select ARCH_MIGHT_HAVE_PC_PARPORT 6 select ARCH_MIGHT_HAVE_PC_SERIO 7 select ARCH_NO_PREEMPT 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 13 select HAVE_AOUT 14 select HAVE_ASM_MODVERSIONS 15 select HAVE_IDE 16 select HAVE_OPROFILE 17 select HAVE_PCSPKR_PLATFORM 18 select HAVE_PERF_EVENTS 19 select NEED_DMA_MAP_STATE 20 select NEED_SG_DMA_LENGTH 21 select VIRT_TO_BUS 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 28 select AUDIT_ARCH 29 select GENERIC_CLOCKEVENTS 30 select GENERIC_CPU_VULNERABILITIES 31 select GENERIC_SMP_IDLE_THREAD 32 select GENERIC_STRNCPY_FROM_USER 33 select GENERIC_STRNLEN_USER 34 select HAVE_ARCH_AUDITSYSCALL 35 select HAVE_MOD_ARCH_SPECIFIC 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 help 42 The Alpha is a 64-bit general-purpose processor designed and 43 marketed by the Digital Equipment Corporation of blessed memory, 44 now Hewlett-Packard. The Alpha Linux project has a home page at 45 <http://www.alphalinux.org/>. 46 47config 64BIT 48 def_bool y 49 50config MMU 51 bool 52 default y 53 54config ARCH_HAS_ILOG2_U32 55 bool 56 default n 57 58config ARCH_HAS_ILOG2_U64 59 bool 60 default n 61 62config GENERIC_CALIBRATE_DELAY 63 bool 64 default y 65 66config ZONE_DMA 67 bool 68 default y 69 70config GENERIC_ISA_DMA 71 bool 72 default y 73 74config PGTABLE_LEVELS 75 int 76 default 3 77 78config AUDIT_ARCH 79 bool 80 81menu "System setup" 82 83choice 84 prompt "Alpha system type" 85 default ALPHA_GENERIC 86 help 87 This is the system type of your hardware. A "generic" kernel will 88 run on any supported Alpha system. However, if you configure a 89 kernel for your specific system, it will be faster and smaller. 90 91 To find out what type of Alpha system you have, you may want to 92 check out the Linux/Alpha FAQ, accessible on the WWW from 93 <http://www.alphalinux.org/>. In summary: 94 95 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366 96 Alpha-XL XL-233, XL-266 97 AlphaBook1 Alpha laptop 98 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400 99 Cabriolet AlphaPC64, AlphaPCI64 100 DP264 DP264 / DS20 / ES40 / DS10 / DS10L 101 EB164 EB164 21164 evaluation board 102 EB64+ EB64+ 21064 evaluation board 103 EB66 EB66 21066 evaluation board 104 EB66+ EB66+ 21066 evaluation board 105 Jensen DECpc 150, DEC 2000 models 300, 500 106 LX164 AlphaPC164-LX 107 Lynx AS 2100A 108 Miata Personal Workstation 433/500/600 a/au 109 Marvel AlphaServer ES47 / ES80 / GS1280 110 Mikasa AS 1000 111 Noname AXPpci33, UDB (Multia) 112 Noritake AS 1000A, AS 600A, AS 800 113 PC164 AlphaPC164 114 Rawhide AS 1200, AS 4000, AS 4100 115 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX 116 SX164 AlphaPC164-SX 117 Sable AS 2000, AS 2100 118 Shark DS 20L 119 Takara Takara (OEM) 120 Titan AlphaServer ES45 / DS25 / DS15 121 Wildfire AlphaServer GS 40/80/160/320 122 123 If you don't know what to do, choose "generic". 124 125config ALPHA_GENERIC 126 bool "Generic" 127 depends on TTY 128 select HAVE_EISA 129 help 130 A generic kernel will run on all supported Alpha hardware. 131 132config ALPHA_ALCOR 133 bool "Alcor/Alpha-XLT" 134 select HAVE_EISA 135 help 136 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data 137 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O 138 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM 139 controller (256-bit memory bus) and a PCI interface. It also does 140 all the work required to support an external Bcache and to maintain 141 memory coherence when a PCI device DMAs into (or out of) memory. 142 143config ALPHA_XL 144 bool "Alpha-XL" 145 help 146 XL-233 and XL-266-based Alpha systems. 147 148config ALPHA_BOOK1 149 bool "AlphaBook1" 150 help 151 Dec AlphaBook1/Burns Alpha-based laptops. 152 153config ALPHA_AVANTI_CH 154 bool "Avanti" 155 156config ALPHA_CABRIOLET 157 bool "Cabriolet" 158 help 159 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now 160 baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA 161 slots, 4 PCI slots (one pair are on a shared slot), uses plug-in 162 Bcache SIMMs. Requires power supply with 3.3V output. 163 164config ALPHA_DP264 165 bool "DP264" 166 help 167 Various 21264 systems with the tsunami core logic chipset. 168 API Networks: 264DP, UP2000(+), CS20; 169 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40. 170 171config ALPHA_EB164 172 bool "EB164" 173 help 174 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has 175 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is 176 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in 177 Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD, 178 MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized 179 motherboard. Requires power supply with 3.3V output. 180 181config ALPHA_EB64P_CH 182 bool "EB64+" 183 184config ALPHA_EB66 185 bool "EB66" 186 help 187 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is 188 identical to EB64+. Baby PC-AT size. Runs from standard PC power 189 supply. The EB66 schematic was published as a marketing poster 190 advertising the 21066 as "the first microprocessor in the world with 191 embedded PCI". 192 193config ALPHA_EB66P 194 bool "EB66+" 195 help 196 Later variant of the EB66 board. 197 198config ALPHA_EIGER 199 bool "Eiger" 200 help 201 Apparently an obscure OEM single-board computer based on the 202 Typhoon/Tsunami chipset family. Information on it is scanty. 203 204config ALPHA_JENSEN 205 bool "Jensen" 206 depends on BROKEN 207 select HAVE_EISA 208 help 209 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one 210 of the first-generation Alpha systems. A number of these systems 211 seem to be available on the second- hand market. The Jensen is a 212 floor-standing tower system which originally used a 150MHz 21064 It 213 used programmable logic to interface a 486 EISA I/O bridge to the 214 CPU. 215 216config ALPHA_LX164 217 bool "LX164" 218 help 219 A technical overview of this board is available at 220 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>. 221 222config ALPHA_LYNX 223 bool "Lynx" 224 select HAVE_EISA 225 help 226 AlphaServer 2100A-based systems. 227 228config ALPHA_MARVEL 229 bool "Marvel" 230 help 231 AlphaServer ES47 / ES80 / GS1280 based on EV7. 232 233config ALPHA_MIATA 234 bool "Miata" 235 select HAVE_EISA 236 help 237 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a, 238 or 600au). 239 240config ALPHA_MIKASA 241 bool "Mikasa" 242 help 243 AlphaServer 1000-based Alpha systems. 244 245config ALPHA_NAUTILUS 246 bool "Nautilus" 247 help 248 Alpha systems based on the AMD 751 & ALI 1543C chipsets. 249 250config ALPHA_NONAME_CH 251 bool "Noname" 252 253config ALPHA_NORITAKE 254 bool "Noritake" 255 select HAVE_EISA 256 help 257 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based 258 systems. 259 260config ALPHA_PC164 261 bool "PC164" 262 263config ALPHA_P2K 264 bool "Platform2000" 265 266config ALPHA_RAWHIDE 267 bool "Rawhide" 268 select HAVE_EISA 269 help 270 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines. 271 See HOWTO at 272 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>. 273 274config ALPHA_RUFFIAN 275 bool "Ruffian" 276 help 277 Samsung APC164UX. There is a page on known problems and workarounds 278 at <http://www.alphalinux.org/faq/FAQ-11.html>. 279 280config ALPHA_RX164 281 bool "RX164" 282 283config ALPHA_SX164 284 bool "SX164" 285 286config ALPHA_SABLE 287 bool "Sable" 288 select HAVE_EISA 289 help 290 Digital AlphaServer 2000 and 2100-based systems. 291 292config ALPHA_SHARK 293 bool "Shark" 294 295config ALPHA_TAKARA 296 bool "Takara" 297 help 298 Alpha 11164-based OEM single-board computer. 299 300config ALPHA_TITAN 301 bool "Titan" 302 help 303 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset. 304 305config ALPHA_WILDFIRE 306 bool "Wildfire" 307 help 308 AlphaServer GS 40/80/160/320 SMP based on the EV67 core. 309 310endchoice 311 312# clear all implied options (don't want default values for those): 313# Most of these machines have ISA slots; not exactly sure which don't, 314# and this doesn't activate hordes of code, so do it always. 315config ISA 316 bool 317 default y 318 help 319 Find out whether you have ISA slots on your motherboard. ISA is the 320 name of a bus system, i.e. the way the CPU talks to the other stuff 321 inside your box. Other bus systems are PCI, EISA, MicroChannel 322 (MCA) or VESA. ISA is an older system, now being displaced by PCI; 323 newer boards don't support it. If you have ISA, say Y, otherwise N. 324 325config ISA_DMA_API 326 bool 327 default y 328 329config ALPHA_NONAME 330 bool 331 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH 332 default y 333 help 334 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia 335 UDB). This design was produced by Digital's Technical OEM (TOEM) 336 group. It uses the 21066 processor running at 166MHz or 233MHz. It 337 is a baby-AT size, and runs from a standard PC power supply. It has 338 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are 339 2 versions, with either PS/2 or large DIN connectors for the 340 keyboard. 341 342config ALPHA_EV4 343 bool 344 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 345 default y if !ALPHA_LYNX 346 347config ALPHA_LCA 348 bool 349 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K 350 default y 351 352config ALPHA_APECS 353 bool 354 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL 355 default y 356 357config ALPHA_EB64P 358 bool 359 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH 360 default y 361 help 362 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA, 363 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs. 364 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI 365 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style), 366 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size. 367 Runs from standard PC power supply. 368 369config ALPHA_EV5 370 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX 371 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 372 373config ALPHA_EV4 374 bool 375 default y if ALPHA_LYNX && !ALPHA_EV5 376 377config ALPHA_CIA 378 bool 379 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 380 default y 381 382config ALPHA_EV56 383 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR 384 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA 385 386config ALPHA_EV56 387 prompt "EV56 CPU (speed >= 333MHz)?" 388 depends on ALPHA_NORITAKE || ALPHA_PRIMO 389 390config ALPHA_EV56 391 prompt "EV56 CPU (speed >= 400MHz)?" 392 depends on ALPHA_RAWHIDE 393 394config ALPHA_PRIMO 395 bool "EV5 CPU daughtercard (model 5/xxx)?" 396 depends on ALPHA_NORITAKE || ALPHA_MIKASA 397 help 398 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx. 399 400config ALPHA_GAMMA 401 bool "EV5 CPU(s) (model 5/xxx)?" 402 depends on ALPHA_SABLE 403 help 404 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx. 405 406config ALPHA_GAMMA 407 bool 408 depends on ALPHA_LYNX 409 default y 410 411config ALPHA_T2 412 bool 413 depends on ALPHA_SABLE || ALPHA_LYNX 414 default y 415 416config ALPHA_PYXIS 417 bool 418 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN 419 default y 420 421config ALPHA_EV6 422 bool 423 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL 424 default y 425 426config ALPHA_TSUNAMI 427 bool 428 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER 429 default y 430 431config ALPHA_EV67 432 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER 433 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL 434 help 435 Is this a machine based on the EV67 core? If in doubt, select N here 436 and the machine will be treated as an EV6. 437 438config ALPHA_MCPCIA 439 bool 440 depends on ALPHA_RAWHIDE 441 default y 442 443config ALPHA_POLARIS 444 bool 445 depends on ALPHA_RX164 446 default y 447 448config ALPHA_IRONGATE 449 bool 450 depends on ALPHA_NAUTILUS 451 default y 452 453config GENERIC_HWEIGHT 454 bool 455 default y if !ALPHA_EV67 456 457config ALPHA_AVANTI 458 bool 459 depends on ALPHA_XL || ALPHA_AVANTI_CH 460 default y 461 help 462 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based 463 Alphas. Info at 464 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>. 465 466config ALPHA_BROKEN_IRQ_MASK 467 bool 468 depends on ALPHA_GENERIC || ALPHA_PC164 469 default y 470 471config VGA_HOSE 472 bool 473 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI) 474 default y 475 help 476 Support VGA on an arbitrary hose; needed for several platforms 477 which always have multiple hoses, and whose consoles support it. 478 479 480config ALPHA_QEMU 481 bool "Run under QEMU emulation" 482 depends on !ALPHA_GENERIC 483 help 484 Assume the presence of special features supported by QEMU PALcode 485 that reduce the overhead of system emulation. 486 487 Generic kernels will auto-detect QEMU. But when building a 488 system-specific kernel, the assumption is that we want to 489 eliminate as many runtime tests as possible. 490 491 If unsure, say N. 492 493 494config ALPHA_SRM 495 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 depends on TTY 497 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 help 499 There are two different types of booting firmware on Alphas: SRM, 500 which is command line driven, and ARC, which uses menus and arrow 501 keys. Details about the Linux/Alpha booting process are contained in 502 the Linux/Alpha FAQ, accessible on the WWW from 503 <http://www.alphalinux.org/>. 504 505 The usual way to load Linux on an Alpha machine is to use MILO 506 (a bootloader that lets you pass command line parameters to the 507 kernel just like lilo does for the x86 architecture) which can be 508 loaded either from ARC or can be installed directly as a permanent 509 firmware replacement from floppy (which requires changing a certain 510 jumper on the motherboard). If you want to do either of these, say N 511 here. If MILO doesn't work on your system (true for Jensen 512 motherboards), you can bypass it altogether and boot Linux directly 513 from an SRM console; say Y here in order to do that. Note that you 514 won't be able to boot from an IDE disk using SRM. 515 516 If unsure, say N. 517 518config ARCH_MAY_HAVE_PC_FDC 519 def_bool y 520 521config SMP 522 bool "Symmetric multi-processing support" 523 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL 524 help 525 This enables support for systems with more than one CPU. If you have 526 a system with only one CPU, say N. If you have a system with more 527 than one CPU, say Y. 528 529 If you say N here, the kernel will run on uni- and multiprocessor 530 machines, but will use only one CPU of a multiprocessor machine. If 531 you say Y here, the kernel will run on many, but not all, 532 uniprocessor machines. On a uniprocessor machine, the kernel 533 will run faster if you say N here. 534 535 See also the SMP-HOWTO available at 536 <http://www.tldp.org/docs.html#howto>. 537 538 If you don't know what to do here, say N. 539 540config NR_CPUS 541 int "Maximum number of CPUs (2-32)" 542 range 2 32 543 depends on SMP 544 default "32" if ALPHA_GENERIC || ALPHA_MARVEL 545 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL 546 help 547 MARVEL support can handle a maximum of 32 CPUs, all the others 548 with working support have a maximum of 4 CPUs. 549 550config ARCH_DISCONTIGMEM_ENABLE 551 bool "Discontiguous Memory Support" 552 help 553 Say Y to support efficient handling of discontiguous physical memory, 554 for architectures which are either NUMA (Non-Uniform Memory Access) 555 or have huge holes in the physical address space for other reasons. 556 See <file:Documentation/vm/numa.rst> for more. 557 558config NUMA 559 bool "NUMA Support (EXPERIMENTAL)" 560 depends on DISCONTIGMEM && BROKEN 561 help 562 Say Y to compile the kernel to support NUMA (Non-Uniform Memory 563 Access). This option is for configuring high-end multiprocessor 564 server machines. If in doubt, say N. 565 566config ALPHA_WTINT 567 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC 568 default y if ALPHA_QEMU 569 default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA) 570 default n if !ALPHA_SRM && !ALPHA_GENERIC 571 default y if SMP 572 help 573 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU 574 to sleep until the next interrupt. This may reduce the power 575 consumed, and the heat produced by the computer. However, it has 576 the side effect of making the cycle counter unreliable as a timing 577 device across the sleep. 578 579 For emulation under QEMU, definitely say Y here, as we have other 580 mechanisms for measuring time than the cycle counter. 581 582 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running 583 MILO, sleep mode is not supported so you might as well say N here. 584 585 For SMP systems we cannot use the cycle counter for timing anyway, 586 so you might as well say Y here. 587 588 If unsure, say N. 589 590config NODES_SHIFT 591 int 592 default "7" 593 depends on NEED_MULTIPLE_NODES 594 595# LARGE_VMALLOC is racy, if you *really* need it then fix it first 596config ALPHA_LARGE_VMALLOC 597 bool 598 help 599 Process creation and other aspects of virtual memory management can 600 be streamlined if we restrict the kernel to one PGD for all vmalloc 601 allocations. This equates to about 8GB. 602 603 Under normal circumstances, this is so far and above what is needed 604 as to be laughable. However, there are certain applications (such 605 as benchmark-grade in-kernel web serving) that can make use of as 606 much vmalloc space as is available. 607 608 Say N unless you know you need gobs and gobs of vmalloc space. 609 610config VERBOSE_MCHECK 611 bool "Verbose Machine Checks" 612 613config VERBOSE_MCHECK_ON 614 int "Verbose Printing Mode (0=off, 1=on, 2=all)" 615 depends on VERBOSE_MCHECK 616 default 1 617 help 618 This option allows the default printing mode to be set, and then 619 possibly overridden by a boot command argument. 620 621 For example, if one wanted the option of printing verbose 622 machine checks, but wanted the default to be as if verbose 623 machine check printing was turned off, then one would choose 624 the printing mode to be 0. Then, upon reboot, one could add 625 the boot command line "verbose_mcheck=1" to get the normal 626 verbose machine check printing, or "verbose_mcheck=2" to get 627 the maximum information available. 628 629 Take the default (1) unless you want more control or more info. 630 631choice 632 prompt "Timer interrupt frequency (HZ)?" 633 default HZ_128 if ALPHA_QEMU 634 default HZ_1200 if ALPHA_RAWHIDE 635 default HZ_1024 636 help 637 The frequency at which timer interrupts occur. A high frequency 638 minimizes latency, whereas a low frequency minimizes overhead of 639 process accounting. The later effect is especially significant 640 when being run under QEMU. 641 642 Note that some Alpha hardware cannot change the interrupt frequency 643 of the timer. If unsure, say 1024 (or 1200 for Rawhide). 644 645 config HZ_32 646 bool "32 Hz" 647 config HZ_64 648 bool "64 Hz" 649 config HZ_128 650 bool "128 Hz" 651 config HZ_256 652 bool "256 Hz" 653 config HZ_1024 654 bool "1024 Hz" 655 config HZ_1200 656 bool "1200 Hz" 657endchoice 658 659config HZ 660 int 661 default 32 if HZ_32 662 default 64 if HZ_64 663 default 128 if HZ_128 664 default 256 if HZ_256 665 default 1200 if HZ_1200 666 default 1024 667 668config SRM_ENV 669 tristate "SRM environment through procfs" 670 depends on PROC_FS 671 help 672 If you enable this option, a subdirectory inside /proc called 673 /proc/srm_environment will give you access to the all important 674 SRM environment variables (those which have a name) and also 675 to all others (by their internal number). 676 677 SRM is something like a BIOS for Alpha machines. There are some 678 other such BIOSes, like AlphaBIOS, which this driver cannot 679 support (hey, that's not SRM!). 680 681 Despite the fact that this driver doesn't work on all Alphas (but 682 only on those which have SRM as their firmware), it's save to 683 build it even if your particular machine doesn't know about SRM 684 (or if you intend to compile a generic kernel). It will simply 685 not create those subdirectory in /proc (and give you some warning, 686 of course). 687 688 This driver is also available as a module and will be called 689 srm_env then. 690 691endmenu 692 693# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig 694# but we also need it if VGA_HOSE is set 695config DUMMY_CONSOLE 696 bool 697 depends on VGA_HOSE 698 default y 699