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 HAVE_AOUT 11 select HAVE_IDE 12 select HAVE_OPROFILE 13 select HAVE_PCSPKR_PLATFORM 14 select HAVE_PERF_EVENTS 15 select NEED_DMA_MAP_STATE 16 select NEED_SG_DMA_LENGTH 17 select VIRT_TO_BUS 18 select GENERIC_IRQ_PROBE 19 select GENERIC_PCI_IOMAP if PCI 20 select AUTO_IRQ_AFFINITY if SMP 21 select GENERIC_IRQ_SHOW 22 select ARCH_WANT_IPC_PARSE_VERSION 23 select ARCH_HAVE_NMI_SAFE_CMPXCHG 24 select AUDIT_ARCH 25 select GENERIC_CLOCKEVENTS 26 select GENERIC_CPU_VULNERABILITIES 27 select GENERIC_SMP_IDLE_THREAD 28 select GENERIC_STRNCPY_FROM_USER 29 select GENERIC_STRNLEN_USER 30 select HAVE_ARCH_AUDITSYSCALL 31 select HAVE_MOD_ARCH_SPECIFIC 32 select MODULES_USE_ELF_RELA 33 select ODD_RT_SIGACTION 34 select OLD_SIGSUSPEND 35 select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67 36 help 37 The Alpha is a 64-bit general-purpose processor designed and 38 marketed by the Digital Equipment Corporation of blessed memory, 39 now Hewlett-Packard. The Alpha Linux project has a home page at 40 <http://www.alphalinux.org/>. 41 42config 64BIT 43 def_bool y 44 45config MMU 46 bool 47 default y 48 49config RWSEM_GENERIC_SPINLOCK 50 bool 51 52config RWSEM_XCHGADD_ALGORITHM 53 bool 54 default y 55 56config ARCH_HAS_ILOG2_U32 57 bool 58 default n 59 60config ARCH_HAS_ILOG2_U64 61 bool 62 default n 63 64config GENERIC_CALIBRATE_DELAY 65 bool 66 default y 67 68config ZONE_DMA 69 bool 70 default y 71 72config GENERIC_ISA_DMA 73 bool 74 default y 75 76config PGTABLE_LEVELS 77 int 78 default 3 79 80config AUDIT_ARCH 81 bool 82 83menu "System setup" 84 85choice 86 prompt "Alpha system type" 87 default ALPHA_GENERIC 88 ---help--- 89 This is the system type of your hardware. A "generic" kernel will 90 run on any supported Alpha system. However, if you configure a 91 kernel for your specific system, it will be faster and smaller. 92 93 To find out what type of Alpha system you have, you may want to 94 check out the Linux/Alpha FAQ, accessible on the WWW from 95 <http://www.alphalinux.org/>. In summary: 96 97 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366 98 Alpha-XL XL-233, XL-266 99 AlphaBook1 Alpha laptop 100 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400 101 Cabriolet AlphaPC64, AlphaPCI64 102 DP264 DP264 / DS20 / ES40 / DS10 / DS10L 103 EB164 EB164 21164 evaluation board 104 EB64+ EB64+ 21064 evaluation board 105 EB66 EB66 21066 evaluation board 106 EB66+ EB66+ 21066 evaluation board 107 Jensen DECpc 150, DEC 2000 models 300, 500 108 LX164 AlphaPC164-LX 109 Lynx AS 2100A 110 Miata Personal Workstation 433/500/600 a/au 111 Marvel AlphaServer ES47 / ES80 / GS1280 112 Mikasa AS 1000 113 Noname AXPpci33, UDB (Multia) 114 Noritake AS 1000A, AS 600A, AS 800 115 PC164 AlphaPC164 116 Rawhide AS 1200, AS 4000, AS 4100 117 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX 118 SX164 AlphaPC164-SX 119 Sable AS 2000, AS 2100 120 Shark DS 20L 121 Takara Takara (OEM) 122 Titan AlphaServer ES45 / DS25 / DS15 123 Wildfire AlphaServer GS 40/80/160/320 124 125 If you don't know what to do, choose "generic". 126 127config ALPHA_GENERIC 128 bool "Generic" 129 depends on TTY 130 help 131 A generic kernel will run on all supported Alpha hardware. 132 133config ALPHA_ALCOR 134 bool "Alcor/Alpha-XLT" 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 DMA_DIRECT_OPS 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 help 225 AlphaServer 2100A-based systems. 226 227config ALPHA_MARVEL 228 bool "Marvel" 229 help 230 AlphaServer ES47 / ES80 / GS1280 based on EV7. 231 232config ALPHA_MIATA 233 bool "Miata" 234 help 235 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a, 236 or 600au). 237 238config ALPHA_MIKASA 239 bool "Mikasa" 240 help 241 AlphaServer 1000-based Alpha systems. 242 243config ALPHA_NAUTILUS 244 bool "Nautilus" 245 help 246 Alpha systems based on the AMD 751 & ALI 1543C chipsets. 247 248config ALPHA_NONAME_CH 249 bool "Noname" 250 251config ALPHA_NORITAKE 252 bool "Noritake" 253 help 254 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based 255 systems. 256 257config ALPHA_PC164 258 bool "PC164" 259 260config ALPHA_P2K 261 bool "Platform2000" 262 263config ALPHA_RAWHIDE 264 bool "Rawhide" 265 help 266 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines. 267 See HOWTO at 268 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>. 269 270config ALPHA_RUFFIAN 271 bool "Ruffian" 272 help 273 Samsung APC164UX. There is a page on known problems and workarounds 274 at <http://www.alphalinux.org/faq/FAQ-11.html>. 275 276config ALPHA_RX164 277 bool "RX164" 278 279config ALPHA_SX164 280 bool "SX164" 281 282config ALPHA_SABLE 283 bool "Sable" 284 help 285 Digital AlphaServer 2000 and 2100-based systems. 286 287config ALPHA_SHARK 288 bool "Shark" 289 290config ALPHA_TAKARA 291 bool "Takara" 292 help 293 Alpha 11164-based OEM single-board computer. 294 295config ALPHA_TITAN 296 bool "Titan" 297 help 298 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset. 299 300config ALPHA_WILDFIRE 301 bool "Wildfire" 302 help 303 AlphaServer GS 40/80/160/320 SMP based on the EV67 core. 304 305endchoice 306 307# clear all implied options (don't want default values for those): 308# Most of these machines have ISA slots; not exactly sure which don't, 309# and this doesn't activate hordes of code, so do it always. 310config ISA 311 bool 312 default y 313 help 314 Find out whether you have ISA slots on your motherboard. ISA is the 315 name of a bus system, i.e. the way the CPU talks to the other stuff 316 inside your box. Other bus systems are PCI, EISA, MicroChannel 317 (MCA) or VESA. ISA is an older system, now being displaced by PCI; 318 newer boards don't support it. If you have ISA, say Y, otherwise N. 319 320config ISA_DMA_API 321 bool 322 default y 323 324config PCI_DOMAINS 325 bool 326 default y 327 328config PCI_SYSCALL 329 def_bool PCI 330 331config ALPHA_NONAME 332 bool 333 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH 334 default y 335 help 336 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia 337 UDB). This design was produced by Digital's Technical OEM (TOEM) 338 group. It uses the 21066 processor running at 166MHz or 233MHz. It 339 is a baby-AT size, and runs from a standard PC power supply. It has 340 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are 341 2 versions, with either PS/2 or large DIN connectors for the 342 keyboard. 343 344config ALPHA_EV4 345 bool 346 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 347 default y if !ALPHA_LYNX 348 349config ALPHA_LCA 350 bool 351 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K 352 default y 353 354config ALPHA_APECS 355 bool 356 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL 357 default y 358 359config ALPHA_EB64P 360 bool 361 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH 362 default y 363 help 364 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA, 365 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs. 366 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI 367 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style), 368 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size. 369 Runs from standard PC power supply. 370 371config ALPHA_EV5 372 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX 373 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 375config ALPHA_EV4 376 bool 377 default y if ALPHA_LYNX && !ALPHA_EV5 378 379config ALPHA_CIA 380 bool 381 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 default y 383 384config ALPHA_EV56 385 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR 386 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA 387 388config ALPHA_EV56 389 prompt "EV56 CPU (speed >= 333MHz)?" 390 depends on ALPHA_NORITAKE || ALPHA_PRIMO 391 392config ALPHA_EV56 393 prompt "EV56 CPU (speed >= 400MHz)?" 394 depends on ALPHA_RAWHIDE 395 396config ALPHA_PRIMO 397 bool "EV5 CPU daughtercard (model 5/xxx)?" 398 depends on ALPHA_NORITAKE || ALPHA_MIKASA 399 help 400 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx. 401 402config ALPHA_GAMMA 403 bool "EV5 CPU(s) (model 5/xxx)?" 404 depends on ALPHA_SABLE 405 help 406 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx. 407 408config ALPHA_GAMMA 409 bool 410 depends on ALPHA_LYNX 411 default y 412 413config ALPHA_T2 414 bool 415 depends on ALPHA_SABLE || ALPHA_LYNX 416 default y 417 418config ALPHA_PYXIS 419 bool 420 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN 421 default y 422 423config ALPHA_EV6 424 bool 425 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL 426 default y 427 428config ALPHA_TSUNAMI 429 bool 430 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER 431 default y 432 433config ALPHA_EV67 434 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER 435 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL 436 help 437 Is this a machine based on the EV67 core? If in doubt, select N here 438 and the machine will be treated as an EV6. 439 440config ALPHA_MCPCIA 441 bool 442 depends on ALPHA_RAWHIDE 443 default y 444 445config ALPHA_POLARIS 446 bool 447 depends on ALPHA_RX164 448 default y 449 450config ALPHA_IRONGATE 451 bool 452 depends on ALPHA_NAUTILUS 453 default y 454 455config GENERIC_HWEIGHT 456 bool 457 default y if !ALPHA_EV67 458 459config ALPHA_AVANTI 460 bool 461 depends on ALPHA_XL || ALPHA_AVANTI_CH 462 default y 463 help 464 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based 465 Alphas. Info at 466 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>. 467 468config ALPHA_BROKEN_IRQ_MASK 469 bool 470 depends on ALPHA_GENERIC || ALPHA_PC164 471 default y 472 473config VGA_HOSE 474 bool 475 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI) 476 default y 477 help 478 Support VGA on an arbitrary hose; needed for several platforms 479 which always have multiple hoses, and whose consoles support it. 480 481 482config ALPHA_QEMU 483 bool "Run under QEMU emulation" 484 depends on !ALPHA_GENERIC 485 ---help--- 486 Assume the presence of special features supported by QEMU PALcode 487 that reduce the overhead of system emulation. 488 489 Generic kernels will auto-detect QEMU. But when building a 490 system-specific kernel, the assumption is that we want to 491 eliminate as many runtime tests as possible. 492 493 If unsure, say N. 494 495 496config ALPHA_SRM 497 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 498 depends on TTY 499 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 500 ---help--- 501 There are two different types of booting firmware on Alphas: SRM, 502 which is command line driven, and ARC, which uses menus and arrow 503 keys. Details about the Linux/Alpha booting process are contained in 504 the Linux/Alpha FAQ, accessible on the WWW from 505 <http://www.alphalinux.org/>. 506 507 The usual way to load Linux on an Alpha machine is to use MILO 508 (a bootloader that lets you pass command line parameters to the 509 kernel just like lilo does for the x86 architecture) which can be 510 loaded either from ARC or can be installed directly as a permanent 511 firmware replacement from floppy (which requires changing a certain 512 jumper on the motherboard). If you want to do either of these, say N 513 here. If MILO doesn't work on your system (true for Jensen 514 motherboards), you can bypass it altogether and boot Linux directly 515 from an SRM console; say Y here in order to do that. Note that you 516 won't be able to boot from an IDE disk using SRM. 517 518 If unsure, say N. 519 520config EISA 521 bool 522 depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE 523 default y 524 525config ARCH_MAY_HAVE_PC_FDC 526 def_bool y 527 528config SMP 529 bool "Symmetric multi-processing support" 530 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL 531 ---help--- 532 This enables support for systems with more than one CPU. If you have 533 a system with only one CPU, say N. If you have a system with more 534 than one CPU, say Y. 535 536 If you say N here, the kernel will run on uni- and multiprocessor 537 machines, but will use only one CPU of a multiprocessor machine. If 538 you say Y here, the kernel will run on many, but not all, 539 uniprocessor machines. On a uniprocessor machine, the kernel 540 will run faster if you say N here. 541 542 See also the SMP-HOWTO available at 543 <http://www.tldp.org/docs.html#howto>. 544 545 If you don't know what to do here, say N. 546 547config NR_CPUS 548 int "Maximum number of CPUs (2-32)" 549 range 2 32 550 depends on SMP 551 default "32" if ALPHA_GENERIC || ALPHA_MARVEL 552 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL 553 help 554 MARVEL support can handle a maximum of 32 CPUs, all the others 555 with working support have a maximum of 4 CPUs. 556 557config ARCH_DISCONTIGMEM_ENABLE 558 bool "Discontiguous Memory Support" 559 help 560 Say Y to support efficient handling of discontiguous physical memory, 561 for architectures which are either NUMA (Non-Uniform Memory Access) 562 or have huge holes in the physical address space for other reasons. 563 See <file:Documentation/vm/numa.rst> for more. 564 565config NUMA 566 bool "NUMA Support (EXPERIMENTAL)" 567 depends on DISCONTIGMEM && BROKEN 568 help 569 Say Y to compile the kernel to support NUMA (Non-Uniform Memory 570 Access). This option is for configuring high-end multiprocessor 571 server machines. If in doubt, say N. 572 573config ALPHA_WTINT 574 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC 575 default y if ALPHA_QEMU 576 default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA) 577 default n if !ALPHA_SRM && !ALPHA_GENERIC 578 default y if SMP 579 ---help--- 580 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU 581 to sleep until the next interrupt. This may reduce the power 582 consumed, and the heat produced by the computer. However, it has 583 the side effect of making the cycle counter unreliable as a timing 584 device across the sleep. 585 586 For emulation under QEMU, definitely say Y here, as we have other 587 mechanisms for measuring time than the cycle counter. 588 589 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running 590 MILO, sleep mode is not supported so you might as well say N here. 591 592 For SMP systems we cannot use the cycle counter for timing anyway, 593 so you might as well say Y here. 594 595 If unsure, say N. 596 597config NODES_SHIFT 598 int 599 default "7" 600 depends on NEED_MULTIPLE_NODES 601 602# LARGE_VMALLOC is racy, if you *really* need it then fix it first 603config ALPHA_LARGE_VMALLOC 604 bool 605 ---help--- 606 Process creation and other aspects of virtual memory management can 607 be streamlined if we restrict the kernel to one PGD for all vmalloc 608 allocations. This equates to about 8GB. 609 610 Under normal circumstances, this is so far and above what is needed 611 as to be laughable. However, there are certain applications (such 612 as benchmark-grade in-kernel web serving) that can make use of as 613 much vmalloc space as is available. 614 615 Say N unless you know you need gobs and gobs of vmalloc space. 616 617config VERBOSE_MCHECK 618 bool "Verbose Machine Checks" 619 620config VERBOSE_MCHECK_ON 621 int "Verbose Printing Mode (0=off, 1=on, 2=all)" 622 depends on VERBOSE_MCHECK 623 default 1 624 ---help--- 625 This option allows the default printing mode to be set, and then 626 possibly overridden by a boot command argument. 627 628 For example, if one wanted the option of printing verbose 629 machine checks, but wanted the default to be as if verbose 630 machine check printing was turned off, then one would choose 631 the printing mode to be 0. Then, upon reboot, one could add 632 the boot command line "verbose_mcheck=1" to get the normal 633 verbose machine check printing, or "verbose_mcheck=2" to get 634 the maximum information available. 635 636 Take the default (1) unless you want more control or more info. 637 638choice 639 prompt "Timer interrupt frequency (HZ)?" 640 default HZ_128 if ALPHA_QEMU 641 default HZ_1200 if ALPHA_RAWHIDE 642 default HZ_1024 643 ---help--- 644 The frequency at which timer interrupts occur. A high frequency 645 minimizes latency, whereas a low frequency minimizes overhead of 646 process accounting. The later effect is especially significant 647 when being run under QEMU. 648 649 Note that some Alpha hardware cannot change the interrupt frequency 650 of the timer. If unsure, say 1024 (or 1200 for Rawhide). 651 652 config HZ_32 653 bool "32 Hz" 654 config HZ_64 655 bool "64 Hz" 656 config HZ_128 657 bool "128 Hz" 658 config HZ_256 659 bool "256 Hz" 660 config HZ_1024 661 bool "1024 Hz" 662 config HZ_1200 663 bool "1200 Hz" 664endchoice 665 666config HZ 667 int 668 default 32 if HZ_32 669 default 64 if HZ_64 670 default 128 if HZ_128 671 default 256 if HZ_256 672 default 1200 if HZ_1200 673 default 1024 674 675source "drivers/eisa/Kconfig" 676 677source "drivers/pcmcia/Kconfig" 678 679config SRM_ENV 680 tristate "SRM environment through procfs" 681 depends on PROC_FS 682 ---help--- 683 If you enable this option, a subdirectory inside /proc called 684 /proc/srm_environment will give you access to the all important 685 SRM environment variables (those which have a name) and also 686 to all others (by their internal number). 687 688 SRM is something like a BIOS for Alpha machines. There are some 689 other such BIOSes, like AlphaBIOS, which this driver cannot 690 support (hey, that's not SRM!). 691 692 Despite the fact that this driver doesn't work on all Alphas (but 693 only on those which have SRM as their firmware), it's save to 694 build it even if your particular machine doesn't know about SRM 695 (or if you intend to compile a generic kernel). It will simply 696 not create those subdirectory in /proc (and give you some warning, 697 of course). 698 699 This driver is also available as a module and will be called 700 srm_env then. 701 702endmenu 703 704# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig 705# but we also need it if VGA_HOSE is set 706config DUMMY_CONSOLE 707 bool 708 depends on VGA_HOSE 709 default y 710