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 DMA_OPS if PCI 11 select FORCE_PCI if !ALPHA_JENSEN 12 select PCI_DOMAINS if PCI 13 select PCI_SYSCALL if PCI 14 select HAVE_AOUT 15 select HAVE_ASM_MODVERSIONS 16 select HAVE_IDE 17 select HAVE_OPROFILE 18 select HAVE_PCSPKR_PLATFORM 19 select HAVE_PERF_EVENTS 20 select NEED_DMA_MAP_STATE 21 select NEED_SG_DMA_LENGTH 22 select VIRT_TO_BUS 23 select GENERIC_IRQ_PROBE 24 select GENERIC_PCI_IOMAP if PCI 25 select AUTO_IRQ_AFFINITY if SMP 26 select GENERIC_IRQ_SHOW 27 select ARCH_WANT_IPC_PARSE_VERSION 28 select ARCH_HAVE_NMI_SAFE_CMPXCHG 29 select AUDIT_ARCH 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 select SET_FS 42 select SPARSEMEM_EXTREME if SPARSEMEM 43 help 44 The Alpha is a 64-bit general-purpose processor designed and 45 marketed by the Digital Equipment Corporation of blessed memory, 46 now Hewlett-Packard. The Alpha Linux project has a home page at 47 <http://www.alphalinux.org/>. 48 49config 64BIT 50 def_bool y 51 52config MMU 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 select HAVE_EISA 131 help 132 A generic kernel will run on all supported Alpha hardware. 133 134config ALPHA_ALCOR 135 bool "Alcor/Alpha-XLT" 136 select HAVE_EISA 137 help 138 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data 139 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O 140 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM 141 controller (256-bit memory bus) and a PCI interface. It also does 142 all the work required to support an external Bcache and to maintain 143 memory coherence when a PCI device DMAs into (or out of) memory. 144 145config ALPHA_XL 146 bool "Alpha-XL" 147 help 148 XL-233 and XL-266-based Alpha systems. 149 150config ALPHA_BOOK1 151 bool "AlphaBook1" 152 help 153 Dec AlphaBook1/Burns Alpha-based laptops. 154 155config ALPHA_AVANTI_CH 156 bool "Avanti" 157 158config ALPHA_CABRIOLET 159 bool "Cabriolet" 160 help 161 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now 162 baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA 163 slots, 4 PCI slots (one pair are on a shared slot), uses plug-in 164 Bcache SIMMs. Requires power supply with 3.3V output. 165 166config ALPHA_DP264 167 bool "DP264" 168 help 169 Various 21264 systems with the tsunami core logic chipset. 170 API Networks: 264DP, UP2000(+), CS20; 171 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40. 172 173config ALPHA_EB164 174 bool "EB164" 175 help 176 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has 177 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is 178 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in 179 Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD, 180 MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized 181 motherboard. Requires power supply with 3.3V output. 182 183config ALPHA_EB64P_CH 184 bool "EB64+" 185 186config ALPHA_EB66 187 bool "EB66" 188 help 189 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is 190 identical to EB64+. Baby PC-AT size. Runs from standard PC power 191 supply. The EB66 schematic was published as a marketing poster 192 advertising the 21066 as "the first microprocessor in the world with 193 embedded PCI". 194 195config ALPHA_EB66P 196 bool "EB66+" 197 help 198 Later variant of the EB66 board. 199 200config ALPHA_EIGER 201 bool "Eiger" 202 help 203 Apparently an obscure OEM single-board computer based on the 204 Typhoon/Tsunami chipset family. Information on it is scanty. 205 206config ALPHA_JENSEN 207 bool "Jensen" 208 depends on BROKEN 209 select HAVE_EISA 210 help 211 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one 212 of the first-generation Alpha systems. A number of these systems 213 seem to be available on the second- hand market. The Jensen is a 214 floor-standing tower system which originally used a 150MHz 21064 It 215 used programmable logic to interface a 486 EISA I/O bridge to the 216 CPU. 217 218config ALPHA_LX164 219 bool "LX164" 220 help 221 A technical overview of this board is available at 222 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>. 223 224config ALPHA_LYNX 225 bool "Lynx" 226 select HAVE_EISA 227 help 228 AlphaServer 2100A-based systems. 229 230config ALPHA_MARVEL 231 bool "Marvel" 232 help 233 AlphaServer ES47 / ES80 / GS1280 based on EV7. 234 235config ALPHA_MIATA 236 bool "Miata" 237 select HAVE_EISA 238 help 239 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a, 240 or 600au). 241 242config ALPHA_MIKASA 243 bool "Mikasa" 244 help 245 AlphaServer 1000-based Alpha systems. 246 247config ALPHA_NAUTILUS 248 bool "Nautilus" 249 help 250 Alpha systems based on the AMD 751 & ALI 1543C chipsets. 251 252config ALPHA_NONAME_CH 253 bool "Noname" 254 255config ALPHA_NORITAKE 256 bool "Noritake" 257 select HAVE_EISA 258 help 259 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based 260 systems. 261 262config ALPHA_PC164 263 bool "PC164" 264 265config ALPHA_P2K 266 bool "Platform2000" 267 268config ALPHA_RAWHIDE 269 bool "Rawhide" 270 select HAVE_EISA 271 help 272 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines. 273 See HOWTO at 274 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>. 275 276config ALPHA_RUFFIAN 277 bool "Ruffian" 278 help 279 Samsung APC164UX. There is a page on known problems and workarounds 280 at <http://www.alphalinux.org/faq/FAQ-11.html>. 281 282config ALPHA_RX164 283 bool "RX164" 284 285config ALPHA_SX164 286 bool "SX164" 287 288config ALPHA_SABLE 289 bool "Sable" 290 select HAVE_EISA 291 help 292 Digital AlphaServer 2000 and 2100-based systems. 293 294config ALPHA_SHARK 295 bool "Shark" 296 297config ALPHA_TAKARA 298 bool "Takara" 299 help 300 Alpha 11164-based OEM single-board computer. 301 302config ALPHA_TITAN 303 bool "Titan" 304 help 305 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset. 306 307config ALPHA_WILDFIRE 308 bool "Wildfire" 309 help 310 AlphaServer GS 40/80/160/320 SMP based on the EV67 core. 311 312endchoice 313 314# clear all implied options (don't want default values for those): 315# Most of these machines have ISA slots; not exactly sure which don't, 316# and this doesn't activate hordes of code, so do it always. 317config ISA 318 bool 319 default y 320 help 321 Find out whether you have ISA slots on your motherboard. ISA is the 322 name of a bus system, i.e. the way the CPU talks to the other stuff 323 inside your box. Other bus systems are PCI, EISA, MicroChannel 324 (MCA) or VESA. ISA is an older system, now being displaced by PCI; 325 newer boards don't support it. If you have ISA, say Y, otherwise N. 326 327config ISA_DMA_API 328 bool 329 default y 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 ARCH_MAY_HAVE_PC_FDC 521 def_bool y 522 523config SMP 524 bool "Symmetric multi-processing support" 525 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL 526 help 527 This enables support for systems with more than one CPU. If you have 528 a system with only one CPU, say N. If you have a system with more 529 than one CPU, say Y. 530 531 If you say N here, the kernel will run on uni- and multiprocessor 532 machines, but will use only one CPU of a multiprocessor machine. If 533 you say Y here, the kernel will run on many, but not all, 534 uniprocessor machines. On a uniprocessor machine, the kernel 535 will run faster if you say N here. 536 537 See also the SMP-HOWTO available at 538 <http://www.tldp.org/docs.html#howto>. 539 540 If you don't know what to do here, say N. 541 542config NR_CPUS 543 int "Maximum number of CPUs (2-32)" 544 range 2 32 545 depends on SMP 546 default "32" if ALPHA_GENERIC || ALPHA_MARVEL 547 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL 548 help 549 MARVEL support can handle a maximum of 32 CPUs, all the others 550 with working support have a maximum of 4 CPUs. 551 552config ARCH_DISCONTIGMEM_ENABLE 553 bool "Discontiguous Memory Support" 554 depends on BROKEN 555 help 556 Say Y to support efficient handling of discontiguous physical memory, 557 for architectures which are either NUMA (Non-Uniform Memory Access) 558 or have huge holes in the physical address space for other reasons. 559 See <file:Documentation/vm/numa.rst> for more. 560 561config ARCH_SPARSEMEM_ENABLE 562 bool "Sparse Memory Support" 563 help 564 Say Y to support efficient handling of discontiguous physical memory, 565 for systems that have huge holes in the physical address space. 566 567config NUMA 568 bool "NUMA Support (EXPERIMENTAL)" 569 depends on DISCONTIGMEM && BROKEN 570 help 571 Say Y to compile the kernel to support NUMA (Non-Uniform Memory 572 Access). This option is for configuring high-end multiprocessor 573 server machines. If in doubt, say N. 574 575config ALPHA_WTINT 576 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC 577 default y if ALPHA_QEMU 578 default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA) 579 default n if !ALPHA_SRM && !ALPHA_GENERIC 580 default y if SMP 581 help 582 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU 583 to sleep until the next interrupt. This may reduce the power 584 consumed, and the heat produced by the computer. However, it has 585 the side effect of making the cycle counter unreliable as a timing 586 device across the sleep. 587 588 For emulation under QEMU, definitely say Y here, as we have other 589 mechanisms for measuring time than the cycle counter. 590 591 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running 592 MILO, sleep mode is not supported so you might as well say N here. 593 594 For SMP systems we cannot use the cycle counter for timing anyway, 595 so you might as well say Y here. 596 597 If unsure, say N. 598 599config NODES_SHIFT 600 int 601 default "7" 602 depends on NEED_MULTIPLE_NODES 603 604# LARGE_VMALLOC is racy, if you *really* need it then fix it first 605config ALPHA_LARGE_VMALLOC 606 bool 607 help 608 Process creation and other aspects of virtual memory management can 609 be streamlined if we restrict the kernel to one PGD for all vmalloc 610 allocations. This equates to about 8GB. 611 612 Under normal circumstances, this is so far and above what is needed 613 as to be laughable. However, there are certain applications (such 614 as benchmark-grade in-kernel web serving) that can make use of as 615 much vmalloc space as is available. 616 617 Say N unless you know you need gobs and gobs of vmalloc space. 618 619config VERBOSE_MCHECK 620 bool "Verbose Machine Checks" 621 622config VERBOSE_MCHECK_ON 623 int "Verbose Printing Mode (0=off, 1=on, 2=all)" 624 depends on VERBOSE_MCHECK 625 default 1 626 help 627 This option allows the default printing mode to be set, and then 628 possibly overridden by a boot command argument. 629 630 For example, if one wanted the option of printing verbose 631 machine checks, but wanted the default to be as if verbose 632 machine check printing was turned off, then one would choose 633 the printing mode to be 0. Then, upon reboot, one could add 634 the boot command line "verbose_mcheck=1" to get the normal 635 verbose machine check printing, or "verbose_mcheck=2" to get 636 the maximum information available. 637 638 Take the default (1) unless you want more control or more info. 639 640choice 641 prompt "Timer interrupt frequency (HZ)?" 642 default HZ_128 if ALPHA_QEMU 643 default HZ_1200 if ALPHA_RAWHIDE 644 default HZ_1024 645 help 646 The frequency at which timer interrupts occur. A high frequency 647 minimizes latency, whereas a low frequency minimizes overhead of 648 process accounting. The later effect is especially significant 649 when being run under QEMU. 650 651 Note that some Alpha hardware cannot change the interrupt frequency 652 of the timer. If unsure, say 1024 (or 1200 for Rawhide). 653 654 config HZ_32 655 bool "32 Hz" 656 config HZ_64 657 bool "64 Hz" 658 config HZ_128 659 bool "128 Hz" 660 config HZ_256 661 bool "256 Hz" 662 config HZ_1024 663 bool "1024 Hz" 664 config HZ_1200 665 bool "1200 Hz" 666endchoice 667 668config HZ 669 int 670 default 32 if HZ_32 671 default 64 if HZ_64 672 default 128 if HZ_128 673 default 256 if HZ_256 674 default 1200 if HZ_1200 675 default 1024 676 677config SRM_ENV 678 tristate "SRM environment through procfs" 679 depends on PROC_FS 680 help 681 If you enable this option, a subdirectory inside /proc called 682 /proc/srm_environment will give you access to the all important 683 SRM environment variables (those which have a name) and also 684 to all others (by their internal number). 685 686 SRM is something like a BIOS for Alpha machines. There are some 687 other such BIOSes, like AlphaBIOS, which this driver cannot 688 support (hey, that's not SRM!). 689 690 Despite the fact that this driver doesn't work on all Alphas (but 691 only on those which have SRM as their firmware), it's save to 692 build it even if your particular machine doesn't know about SRM 693 (or if you intend to compile a generic kernel). It will simply 694 not create those subdirectory in /proc (and give you some warning, 695 of course). 696 697 This driver is also available as a module and will be called 698 srm_env then. 699 700endmenu 701 702# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig 703# but we also need it if VGA_HOSE is set 704config DUMMY_CONSOLE 705 bool 706 depends on VGA_HOSE 707 default y 708