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_USE_CMPXCHG_LOCKREF 9 select FORCE_PCI if !ALPHA_JENSEN 10 select PCI_DOMAINS if PCI 11 select PCI_SYSCALL if PCI 12 select HAVE_AOUT 13 select HAVE_IDE 14 select HAVE_OPROFILE 15 select HAVE_PCSPKR_PLATFORM 16 select HAVE_PERF_EVENTS 17 select NEED_DMA_MAP_STATE 18 select NEED_SG_DMA_LENGTH 19 select VIRT_TO_BUS 20 select GENERIC_IRQ_PROBE 21 select GENERIC_PCI_IOMAP if PCI 22 select AUTO_IRQ_AFFINITY if SMP 23 select GENERIC_IRQ_SHOW 24 select ARCH_WANT_IPC_PARSE_VERSION 25 select ARCH_HAVE_NMI_SAFE_CMPXCHG 26 select AUDIT_ARCH 27 select GENERIC_CLOCKEVENTS 28 select GENERIC_CPU_VULNERABILITIES 29 select GENERIC_SMP_IDLE_THREAD 30 select GENERIC_STRNCPY_FROM_USER 31 select GENERIC_STRNLEN_USER 32 select HAVE_ARCH_AUDITSYSCALL 33 select HAVE_MOD_ARCH_SPECIFIC 34 select MODULES_USE_ELF_RELA 35 select ODD_RT_SIGACTION 36 select OLD_SIGSUSPEND 37 select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67 38 help 39 The Alpha is a 64-bit general-purpose processor designed and 40 marketed by the Digital Equipment Corporation of blessed memory, 41 now Hewlett-Packard. The Alpha Linux project has a home page at 42 <http://www.alphalinux.org/>. 43 44config 64BIT 45 def_bool y 46 47config MMU 48 bool 49 default y 50 51config RWSEM_GENERIC_SPINLOCK 52 bool 53 54config RWSEM_XCHGADD_ALGORITHM 55 bool 56 default y 57 58config ARCH_HAS_ILOG2_U32 59 bool 60 default n 61 62config ARCH_HAS_ILOG2_U64 63 bool 64 default n 65 66config GENERIC_CALIBRATE_DELAY 67 bool 68 default y 69 70config ZONE_DMA 71 bool 72 default y 73 74config GENERIC_ISA_DMA 75 bool 76 default y 77 78config PGTABLE_LEVELS 79 int 80 default 3 81 82config AUDIT_ARCH 83 bool 84 85menu "System setup" 86 87choice 88 prompt "Alpha system type" 89 default ALPHA_GENERIC 90 ---help--- 91 This is the system type of your hardware. A "generic" kernel will 92 run on any supported Alpha system. However, if you configure a 93 kernel for your specific system, it will be faster and smaller. 94 95 To find out what type of Alpha system you have, you may want to 96 check out the Linux/Alpha FAQ, accessible on the WWW from 97 <http://www.alphalinux.org/>. In summary: 98 99 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366 100 Alpha-XL XL-233, XL-266 101 AlphaBook1 Alpha laptop 102 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400 103 Cabriolet AlphaPC64, AlphaPCI64 104 DP264 DP264 / DS20 / ES40 / DS10 / DS10L 105 EB164 EB164 21164 evaluation board 106 EB64+ EB64+ 21064 evaluation board 107 EB66 EB66 21066 evaluation board 108 EB66+ EB66+ 21066 evaluation board 109 Jensen DECpc 150, DEC 2000 models 300, 500 110 LX164 AlphaPC164-LX 111 Lynx AS 2100A 112 Miata Personal Workstation 433/500/600 a/au 113 Marvel AlphaServer ES47 / ES80 / GS1280 114 Mikasa AS 1000 115 Noname AXPpci33, UDB (Multia) 116 Noritake AS 1000A, AS 600A, AS 800 117 PC164 AlphaPC164 118 Rawhide AS 1200, AS 4000, AS 4100 119 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX 120 SX164 AlphaPC164-SX 121 Sable AS 2000, AS 2100 122 Shark DS 20L 123 Takara Takara (OEM) 124 Titan AlphaServer ES45 / DS25 / DS15 125 Wildfire AlphaServer GS 40/80/160/320 126 127 If you don't know what to do, choose "generic". 128 129config ALPHA_GENERIC 130 bool "Generic" 131 depends on TTY 132 select HAVE_EISA 133 help 134 A generic kernel will run on all supported Alpha hardware. 135 136config ALPHA_ALCOR 137 bool "Alcor/Alpha-XLT" 138 select HAVE_EISA 139 help 140 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data 141 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O 142 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM 143 controller (256-bit memory bus) and a PCI interface. It also does 144 all the work required to support an external Bcache and to maintain 145 memory coherence when a PCI device DMAs into (or out of) memory. 146 147config ALPHA_XL 148 bool "Alpha-XL" 149 help 150 XL-233 and XL-266-based Alpha systems. 151 152config ALPHA_BOOK1 153 bool "AlphaBook1" 154 help 155 Dec AlphaBook1/Burns Alpha-based laptops. 156 157config ALPHA_AVANTI_CH 158 bool "Avanti" 159 160config ALPHA_CABRIOLET 161 bool "Cabriolet" 162 help 163 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now 164 baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA 165 slots, 4 PCI slots (one pair are on a shared slot), uses plug-in 166 Bcache SIMMs. Requires power supply with 3.3V output. 167 168config ALPHA_DP264 169 bool "DP264" 170 help 171 Various 21264 systems with the tsunami core logic chipset. 172 API Networks: 264DP, UP2000(+), CS20; 173 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40. 174 175config ALPHA_EB164 176 bool "EB164" 177 help 178 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has 179 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is 180 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in 181 Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD, 182 MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized 183 motherboard. Requires power supply with 3.3V output. 184 185config ALPHA_EB64P_CH 186 bool "EB64+" 187 188config ALPHA_EB66 189 bool "EB66" 190 help 191 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is 192 identical to EB64+. Baby PC-AT size. Runs from standard PC power 193 supply. The EB66 schematic was published as a marketing poster 194 advertising the 21066 as "the first microprocessor in the world with 195 embedded PCI". 196 197config ALPHA_EB66P 198 bool "EB66+" 199 help 200 Later variant of the EB66 board. 201 202config ALPHA_EIGER 203 bool "Eiger" 204 help 205 Apparently an obscure OEM single-board computer based on the 206 Typhoon/Tsunami chipset family. Information on it is scanty. 207 208config ALPHA_JENSEN 209 bool "Jensen" 210 depends on BROKEN 211 select DMA_DIRECT_OPS 212 select HAVE_EISA 213 help 214 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one 215 of the first-generation Alpha systems. A number of these systems 216 seem to be available on the second- hand market. The Jensen is a 217 floor-standing tower system which originally used a 150MHz 21064 It 218 used programmable logic to interface a 486 EISA I/O bridge to the 219 CPU. 220 221config ALPHA_LX164 222 bool "LX164" 223 help 224 A technical overview of this board is available at 225 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>. 226 227config ALPHA_LYNX 228 bool "Lynx" 229 select HAVE_EISA 230 help 231 AlphaServer 2100A-based systems. 232 233config ALPHA_MARVEL 234 bool "Marvel" 235 help 236 AlphaServer ES47 / ES80 / GS1280 based on EV7. 237 238config ALPHA_MIATA 239 bool "Miata" 240 select HAVE_EISA 241 help 242 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a, 243 or 600au). 244 245config ALPHA_MIKASA 246 bool "Mikasa" 247 help 248 AlphaServer 1000-based Alpha systems. 249 250config ALPHA_NAUTILUS 251 bool "Nautilus" 252 help 253 Alpha systems based on the AMD 751 & ALI 1543C chipsets. 254 255config ALPHA_NONAME_CH 256 bool "Noname" 257 258config ALPHA_NORITAKE 259 bool "Noritake" 260 select HAVE_EISA 261 help 262 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based 263 systems. 264 265config ALPHA_PC164 266 bool "PC164" 267 268config ALPHA_P2K 269 bool "Platform2000" 270 271config ALPHA_RAWHIDE 272 bool "Rawhide" 273 select HAVE_EISA 274 help 275 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines. 276 See HOWTO at 277 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>. 278 279config ALPHA_RUFFIAN 280 bool "Ruffian" 281 help 282 Samsung APC164UX. There is a page on known problems and workarounds 283 at <http://www.alphalinux.org/faq/FAQ-11.html>. 284 285config ALPHA_RX164 286 bool "RX164" 287 288config ALPHA_SX164 289 bool "SX164" 290 291config ALPHA_SABLE 292 bool "Sable" 293 select HAVE_EISA 294 help 295 Digital AlphaServer 2000 and 2100-based systems. 296 297config ALPHA_SHARK 298 bool "Shark" 299 300config ALPHA_TAKARA 301 bool "Takara" 302 help 303 Alpha 11164-based OEM single-board computer. 304 305config ALPHA_TITAN 306 bool "Titan" 307 help 308 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset. 309 310config ALPHA_WILDFIRE 311 bool "Wildfire" 312 help 313 AlphaServer GS 40/80/160/320 SMP based on the EV67 core. 314 315endchoice 316 317# clear all implied options (don't want default values for those): 318# Most of these machines have ISA slots; not exactly sure which don't, 319# and this doesn't activate hordes of code, so do it always. 320config ISA 321 bool 322 default y 323 help 324 Find out whether you have ISA slots on your motherboard. ISA is the 325 name of a bus system, i.e. the way the CPU talks to the other stuff 326 inside your box. Other bus systems are PCI, EISA, MicroChannel 327 (MCA) or VESA. ISA is an older system, now being displaced by PCI; 328 newer boards don't support it. If you have ISA, say Y, otherwise N. 329 330config ISA_DMA_API 331 bool 332 default y 333 334config ALPHA_NONAME 335 bool 336 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH 337 default y 338 help 339 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia 340 UDB). This design was produced by Digital's Technical OEM (TOEM) 341 group. It uses the 21066 processor running at 166MHz or 233MHz. It 342 is a baby-AT size, and runs from a standard PC power supply. It has 343 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are 344 2 versions, with either PS/2 or large DIN connectors for the 345 keyboard. 346 347config ALPHA_EV4 348 bool 349 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 350 default y if !ALPHA_LYNX 351 352config ALPHA_LCA 353 bool 354 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K 355 default y 356 357config ALPHA_APECS 358 bool 359 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL 360 default y 361 362config ALPHA_EB64P 363 bool 364 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH 365 default y 366 help 367 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA, 368 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs. 369 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI 370 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style), 371 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size. 372 Runs from standard PC power supply. 373 374config ALPHA_EV5 375 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX 376 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 377 378config ALPHA_EV4 379 bool 380 default y if ALPHA_LYNX && !ALPHA_EV5 381 382config ALPHA_CIA 383 bool 384 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 385 default y 386 387config ALPHA_EV56 388 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR 389 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA 390 391config ALPHA_EV56 392 prompt "EV56 CPU (speed >= 333MHz)?" 393 depends on ALPHA_NORITAKE || ALPHA_PRIMO 394 395config ALPHA_EV56 396 prompt "EV56 CPU (speed >= 400MHz)?" 397 depends on ALPHA_RAWHIDE 398 399config ALPHA_PRIMO 400 bool "EV5 CPU daughtercard (model 5/xxx)?" 401 depends on ALPHA_NORITAKE || ALPHA_MIKASA 402 help 403 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx. 404 405config ALPHA_GAMMA 406 bool "EV5 CPU(s) (model 5/xxx)?" 407 depends on ALPHA_SABLE 408 help 409 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx. 410 411config ALPHA_GAMMA 412 bool 413 depends on ALPHA_LYNX 414 default y 415 416config ALPHA_T2 417 bool 418 depends on ALPHA_SABLE || ALPHA_LYNX 419 default y 420 421config ALPHA_PYXIS 422 bool 423 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN 424 default y 425 426config ALPHA_EV6 427 bool 428 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL 429 default y 430 431config ALPHA_TSUNAMI 432 bool 433 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER 434 default y 435 436config ALPHA_EV67 437 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER 438 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL 439 help 440 Is this a machine based on the EV67 core? If in doubt, select N here 441 and the machine will be treated as an EV6. 442 443config ALPHA_MCPCIA 444 bool 445 depends on ALPHA_RAWHIDE 446 default y 447 448config ALPHA_POLARIS 449 bool 450 depends on ALPHA_RX164 451 default y 452 453config ALPHA_IRONGATE 454 bool 455 depends on ALPHA_NAUTILUS 456 default y 457 458config GENERIC_HWEIGHT 459 bool 460 default y if !ALPHA_EV67 461 462config ALPHA_AVANTI 463 bool 464 depends on ALPHA_XL || ALPHA_AVANTI_CH 465 default y 466 help 467 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based 468 Alphas. Info at 469 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>. 470 471config ALPHA_BROKEN_IRQ_MASK 472 bool 473 depends on ALPHA_GENERIC || ALPHA_PC164 474 default y 475 476config VGA_HOSE 477 bool 478 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI) 479 default y 480 help 481 Support VGA on an arbitrary hose; needed for several platforms 482 which always have multiple hoses, and whose consoles support it. 483 484 485config ALPHA_QEMU 486 bool "Run under QEMU emulation" 487 depends on !ALPHA_GENERIC 488 ---help--- 489 Assume the presence of special features supported by QEMU PALcode 490 that reduce the overhead of system emulation. 491 492 Generic kernels will auto-detect QEMU. But when building a 493 system-specific kernel, the assumption is that we want to 494 eliminate as many runtime tests as possible. 495 496 If unsure, say N. 497 498 499config ALPHA_SRM 500 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 501 depends on TTY 502 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 503 ---help--- 504 There are two different types of booting firmware on Alphas: SRM, 505 which is command line driven, and ARC, which uses menus and arrow 506 keys. Details about the Linux/Alpha booting process are contained in 507 the Linux/Alpha FAQ, accessible on the WWW from 508 <http://www.alphalinux.org/>. 509 510 The usual way to load Linux on an Alpha machine is to use MILO 511 (a bootloader that lets you pass command line parameters to the 512 kernel just like lilo does for the x86 architecture) which can be 513 loaded either from ARC or can be installed directly as a permanent 514 firmware replacement from floppy (which requires changing a certain 515 jumper on the motherboard). If you want to do either of these, say N 516 here. If MILO doesn't work on your system (true for Jensen 517 motherboards), you can bypass it altogether and boot Linux directly 518 from an SRM console; say Y here in order to do that. Note that you 519 won't be able to boot from an IDE disk using SRM. 520 521 If unsure, say N. 522 523config ARCH_MAY_HAVE_PC_FDC 524 def_bool y 525 526config SMP 527 bool "Symmetric multi-processing support" 528 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL 529 ---help--- 530 This enables support for systems with more than one CPU. If you have 531 a system with only one CPU, say N. If you have a system with more 532 than one CPU, say Y. 533 534 If you say N here, the kernel will run on uni- and multiprocessor 535 machines, but will use only one CPU of a multiprocessor machine. If 536 you say Y here, the kernel will run on many, but not all, 537 uniprocessor machines. On a uniprocessor machine, the kernel 538 will run faster if you say N here. 539 540 See also the SMP-HOWTO available at 541 <http://www.tldp.org/docs.html#howto>. 542 543 If you don't know what to do here, say N. 544 545config NR_CPUS 546 int "Maximum number of CPUs (2-32)" 547 range 2 32 548 depends on SMP 549 default "32" if ALPHA_GENERIC || ALPHA_MARVEL 550 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL 551 help 552 MARVEL support can handle a maximum of 32 CPUs, all the others 553 with working support have a maximum of 4 CPUs. 554 555config ARCH_DISCONTIGMEM_ENABLE 556 bool "Discontiguous Memory Support" 557 help 558 Say Y to support efficient handling of discontiguous physical memory, 559 for architectures which are either NUMA (Non-Uniform Memory Access) 560 or have huge holes in the physical address space for other reasons. 561 See <file:Documentation/vm/numa.rst> for more. 562 563config NUMA 564 bool "NUMA Support (EXPERIMENTAL)" 565 depends on DISCONTIGMEM && BROKEN 566 help 567 Say Y to compile the kernel to support NUMA (Non-Uniform Memory 568 Access). This option is for configuring high-end multiprocessor 569 server machines. If in doubt, say N. 570 571config ALPHA_WTINT 572 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC 573 default y if ALPHA_QEMU 574 default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA) 575 default n if !ALPHA_SRM && !ALPHA_GENERIC 576 default y if SMP 577 ---help--- 578 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU 579 to sleep until the next interrupt. This may reduce the power 580 consumed, and the heat produced by the computer. However, it has 581 the side effect of making the cycle counter unreliable as a timing 582 device across the sleep. 583 584 For emulation under QEMU, definitely say Y here, as we have other 585 mechanisms for measuring time than the cycle counter. 586 587 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running 588 MILO, sleep mode is not supported so you might as well say N here. 589 590 For SMP systems we cannot use the cycle counter for timing anyway, 591 so you might as well say Y here. 592 593 If unsure, say N. 594 595config NODES_SHIFT 596 int 597 default "7" 598 depends on NEED_MULTIPLE_NODES 599 600# LARGE_VMALLOC is racy, if you *really* need it then fix it first 601config ALPHA_LARGE_VMALLOC 602 bool 603 ---help--- 604 Process creation and other aspects of virtual memory management can 605 be streamlined if we restrict the kernel to one PGD for all vmalloc 606 allocations. This equates to about 8GB. 607 608 Under normal circumstances, this is so far and above what is needed 609 as to be laughable. However, there are certain applications (such 610 as benchmark-grade in-kernel web serving) that can make use of as 611 much vmalloc space as is available. 612 613 Say N unless you know you need gobs and gobs of vmalloc space. 614 615config VERBOSE_MCHECK 616 bool "Verbose Machine Checks" 617 618config VERBOSE_MCHECK_ON 619 int "Verbose Printing Mode (0=off, 1=on, 2=all)" 620 depends on VERBOSE_MCHECK 621 default 1 622 ---help--- 623 This option allows the default printing mode to be set, and then 624 possibly overridden by a boot command argument. 625 626 For example, if one wanted the option of printing verbose 627 machine checks, but wanted the default to be as if verbose 628 machine check printing was turned off, then one would choose 629 the printing mode to be 0. Then, upon reboot, one could add 630 the boot command line "verbose_mcheck=1" to get the normal 631 verbose machine check printing, or "verbose_mcheck=2" to get 632 the maximum information available. 633 634 Take the default (1) unless you want more control or more info. 635 636choice 637 prompt "Timer interrupt frequency (HZ)?" 638 default HZ_128 if ALPHA_QEMU 639 default HZ_1200 if ALPHA_RAWHIDE 640 default HZ_1024 641 ---help--- 642 The frequency at which timer interrupts occur. A high frequency 643 minimizes latency, whereas a low frequency minimizes overhead of 644 process accounting. The later effect is especially significant 645 when being run under QEMU. 646 647 Note that some Alpha hardware cannot change the interrupt frequency 648 of the timer. If unsure, say 1024 (or 1200 for Rawhide). 649 650 config HZ_32 651 bool "32 Hz" 652 config HZ_64 653 bool "64 Hz" 654 config HZ_128 655 bool "128 Hz" 656 config HZ_256 657 bool "256 Hz" 658 config HZ_1024 659 bool "1024 Hz" 660 config HZ_1200 661 bool "1200 Hz" 662endchoice 663 664config HZ 665 int 666 default 32 if HZ_32 667 default 64 if HZ_64 668 default 128 if HZ_128 669 default 256 if HZ_256 670 default 1200 if HZ_1200 671 default 1024 672 673config SRM_ENV 674 tristate "SRM environment through procfs" 675 depends on PROC_FS 676 ---help--- 677 If you enable this option, a subdirectory inside /proc called 678 /proc/srm_environment will give you access to the all important 679 SRM environment variables (those which have a name) and also 680 to all others (by their internal number). 681 682 SRM is something like a BIOS for Alpha machines. There are some 683 other such BIOSes, like AlphaBIOS, which this driver cannot 684 support (hey, that's not SRM!). 685 686 Despite the fact that this driver doesn't work on all Alphas (but 687 only on those which have SRM as their firmware), it's save to 688 build it even if your particular machine doesn't know about SRM 689 (or if you intend to compile a generic kernel). It will simply 690 not create those subdirectory in /proc (and give you some warning, 691 of course). 692 693 This driver is also available as a module and will be called 694 srm_env then. 695 696endmenu 697 698# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig 699# but we also need it if VGA_HOSE is set 700config DUMMY_CONSOLE 701 bool 702 depends on VGA_HOSE 703 default y 704