1# SPDX-License-Identifier: GPL-2.0 2config ALPHA 3 bool 4 default y 5 select ARCH_32BIT_USTAT_F_TINODE 6 select ARCH_MIGHT_HAVE_PC_PARPORT 7 select ARCH_MIGHT_HAVE_PC_SERIO 8 select ARCH_NO_PREEMPT 9 select ARCH_NO_SG_CHAIN 10 select ARCH_USE_CMPXCHG_LOCKREF 11 select DMA_OPS if PCI 12 select FORCE_PCI if !ALPHA_JENSEN 13 select PCI_DOMAINS if PCI 14 select PCI_SYSCALL if PCI 15 select HAVE_AOUT 16 select HAVE_ASM_MODVERSIONS 17 select HAVE_IDE 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 select ZONE_DMA 44 help 45 The Alpha is a 64-bit general-purpose processor designed and 46 marketed by the Digital Equipment Corporation of blessed memory, 47 now Hewlett-Packard. The Alpha Linux project has a home page at 48 <http://www.alphalinux.org/>. 49 50config 64BIT 51 def_bool y 52 53config MMU 54 bool 55 default y 56 57config ARCH_HAS_ILOG2_U32 58 bool 59 default n 60 61config ARCH_HAS_ILOG2_U64 62 bool 63 default n 64 65config GENERIC_CALIBRATE_DELAY 66 bool 67 default y 68 69config GENERIC_ISA_DMA 70 bool 71 default y 72 73config PGTABLE_LEVELS 74 int 75 default 3 76 77config AUDIT_ARCH 78 bool 79 80menu "System setup" 81 82choice 83 prompt "Alpha system type" 84 default ALPHA_GENERIC 85 help 86 This is the system type of your hardware. A "generic" kernel will 87 run on any supported Alpha system. However, if you configure a 88 kernel for your specific system, it will be faster and smaller. 89 90 To find out what type of Alpha system you have, you may want to 91 check out the Linux/Alpha FAQ, accessible on the WWW from 92 <http://www.alphalinux.org/>. In summary: 93 94 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366 95 Alpha-XL XL-233, XL-266 96 AlphaBook1 Alpha laptop 97 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400 98 Cabriolet AlphaPC64, AlphaPCI64 99 DP264 DP264 / DS20 / ES40 / DS10 / DS10L 100 EB164 EB164 21164 evaluation board 101 EB64+ EB64+ 21064 evaluation board 102 EB66 EB66 21066 evaluation board 103 EB66+ EB66+ 21066 evaluation board 104 Jensen DECpc 150, DEC 2000 models 300, 500 105 LX164 AlphaPC164-LX 106 Lynx AS 2100A 107 Miata Personal Workstation 433/500/600 a/au 108 Marvel AlphaServer ES47 / ES80 / GS1280 109 Mikasa AS 1000 110 Noname AXPpci33, UDB (Multia) 111 Noritake AS 1000A, AS 600A, AS 800 112 PC164 AlphaPC164 113 Rawhide AS 1200, AS 4000, AS 4100 114 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX 115 SX164 AlphaPC164-SX 116 Sable AS 2000, AS 2100 117 Shark DS 20L 118 Takara Takara (OEM) 119 Titan AlphaServer ES45 / DS25 / DS15 120 Wildfire AlphaServer GS 40/80/160/320 121 122 If you don't know what to do, choose "generic". 123 124config ALPHA_GENERIC 125 bool "Generic" 126 depends on TTY 127 select HAVE_EISA 128 help 129 A generic kernel will run on all supported Alpha hardware. 130 131config ALPHA_ALCOR 132 bool "Alcor/Alpha-XLT" 133 select HAVE_EISA 134 help 135 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data 136 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O 137 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM 138 controller (256-bit memory bus) and a PCI interface. It also does 139 all the work required to support an external Bcache and to maintain 140 memory coherence when a PCI device DMAs into (or out of) memory. 141 142config ALPHA_XL 143 bool "Alpha-XL" 144 help 145 XL-233 and XL-266-based Alpha systems. 146 147config ALPHA_BOOK1 148 bool "AlphaBook1" 149 help 150 Dec AlphaBook1/Burns Alpha-based laptops. 151 152config ALPHA_AVANTI_CH 153 bool "Avanti" 154 155config ALPHA_CABRIOLET 156 bool "Cabriolet" 157 help 158 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now 159 baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA 160 slots, 4 PCI slots (one pair are on a shared slot), uses plug-in 161 Bcache SIMMs. Requires power supply with 3.3V output. 162 163config ALPHA_DP264 164 bool "DP264" 165 help 166 Various 21264 systems with the tsunami core logic chipset. 167 API Networks: 264DP, UP2000(+), CS20; 168 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40. 169 170config ALPHA_EB164 171 bool "EB164" 172 help 173 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has 174 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is 175 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in 176 Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD, 177 MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized 178 motherboard. Requires power supply with 3.3V output. 179 180config ALPHA_EB64P_CH 181 bool "EB64+" 182 183config ALPHA_EB66 184 bool "EB66" 185 help 186 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is 187 identical to EB64+. Baby PC-AT size. Runs from standard PC power 188 supply. The EB66 schematic was published as a marketing poster 189 advertising the 21066 as "the first microprocessor in the world with 190 embedded PCI". 191 192config ALPHA_EB66P 193 bool "EB66+" 194 help 195 Later variant of the EB66 board. 196 197config ALPHA_EIGER 198 bool "Eiger" 199 help 200 Apparently an obscure OEM single-board computer based on the 201 Typhoon/Tsunami chipset family. Information on it is scanty. 202 203config ALPHA_JENSEN 204 bool "Jensen" 205 depends on BROKEN 206 select HAVE_EISA 207 help 208 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one 209 of the first-generation Alpha systems. A number of these systems 210 seem to be available on the second- hand market. The Jensen is a 211 floor-standing tower system which originally used a 150MHz 21064 It 212 used programmable logic to interface a 486 EISA I/O bridge to the 213 CPU. 214 215config ALPHA_LX164 216 bool "LX164" 217 help 218 A technical overview of this board is available at 219 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>. 220 221config ALPHA_LYNX 222 bool "Lynx" 223 select HAVE_EISA 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 select HAVE_EISA 235 help 236 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a, 237 or 600au). 238 239config ALPHA_MIKASA 240 bool "Mikasa" 241 help 242 AlphaServer 1000-based Alpha systems. 243 244config ALPHA_NAUTILUS 245 bool "Nautilus" 246 help 247 Alpha systems based on the AMD 751 & ALI 1543C chipsets. 248 249config ALPHA_NONAME_CH 250 bool "Noname" 251 252config ALPHA_NORITAKE 253 bool "Noritake" 254 select HAVE_EISA 255 help 256 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based 257 systems. 258 259config ALPHA_PC164 260 bool "PC164" 261 262config ALPHA_P2K 263 bool "Platform2000" 264 265config ALPHA_RAWHIDE 266 bool "Rawhide" 267 select HAVE_EISA 268 help 269 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines. 270 See HOWTO at 271 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>. 272 273config ALPHA_RUFFIAN 274 bool "Ruffian" 275 help 276 Samsung APC164UX. There is a page on known problems and workarounds 277 at <http://www.alphalinux.org/faq/FAQ-11.html>. 278 279config ALPHA_RX164 280 bool "RX164" 281 282config ALPHA_SX164 283 bool "SX164" 284 285config ALPHA_SABLE 286 bool "Sable" 287 select HAVE_EISA 288 help 289 Digital AlphaServer 2000 and 2100-based systems. 290 291config ALPHA_SHARK 292 bool "Shark" 293 294config ALPHA_TAKARA 295 bool "Takara" 296 help 297 Alpha 11164-based OEM single-board computer. 298 299config ALPHA_TITAN 300 bool "Titan" 301 help 302 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset. 303 304config ALPHA_WILDFIRE 305 bool "Wildfire" 306 help 307 AlphaServer GS 40/80/160/320 SMP based on the EV67 core. 308 309endchoice 310 311# clear all implied options (don't want default values for those): 312# Most of these machines have ISA slots; not exactly sure which don't, 313# and this doesn't activate hordes of code, so do it always. 314config ISA 315 bool 316 default y 317 help 318 Find out whether you have ISA slots on your motherboard. ISA is the 319 name of a bus system, i.e. the way the CPU talks to the other stuff 320 inside your box. Other bus systems are PCI, EISA, MicroChannel 321 (MCA) or VESA. ISA is an older system, now being displaced by PCI; 322 newer boards don't support it. If you have ISA, say Y, otherwise N. 323 324config ISA_DMA_API 325 bool 326 default y 327 328config ALPHA_NONAME 329 bool 330 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH 331 default y 332 help 333 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia 334 UDB). This design was produced by Digital's Technical OEM (TOEM) 335 group. It uses the 21066 processor running at 166MHz or 233MHz. It 336 is a baby-AT size, and runs from a standard PC power supply. It has 337 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are 338 2 versions, with either PS/2 or large DIN connectors for the 339 keyboard. 340 341config ALPHA_EV4 342 bool 343 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 344 default y if !ALPHA_LYNX 345 346config ALPHA_LCA 347 bool 348 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K 349 default y 350 351config ALPHA_APECS 352 bool 353 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL 354 default y 355 356config ALPHA_EB64P 357 bool 358 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH 359 default y 360 help 361 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA, 362 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs. 363 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI 364 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style), 365 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size. 366 Runs from standard PC power supply. 367 368config ALPHA_EV5 369 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX 370 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 371 372config ALPHA_EV4 373 bool 374 default y if ALPHA_LYNX && !ALPHA_EV5 375 376config ALPHA_CIA 377 bool 378 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 379 default y 380 381config ALPHA_EV56 382 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR 383 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA 384 385config ALPHA_EV56 386 prompt "EV56 CPU (speed >= 333MHz)?" 387 depends on ALPHA_NORITAKE || ALPHA_PRIMO 388 389config ALPHA_EV56 390 prompt "EV56 CPU (speed >= 400MHz)?" 391 depends on ALPHA_RAWHIDE 392 393config ALPHA_PRIMO 394 bool "EV5 CPU daughtercard (model 5/xxx)?" 395 depends on ALPHA_NORITAKE || ALPHA_MIKASA 396 help 397 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx. 398 399config ALPHA_GAMMA 400 bool "EV5 CPU(s) (model 5/xxx)?" 401 depends on ALPHA_SABLE 402 help 403 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx. 404 405config ALPHA_GAMMA 406 bool 407 depends on ALPHA_LYNX 408 default y 409 410config ALPHA_T2 411 bool 412 depends on ALPHA_SABLE || ALPHA_LYNX 413 default y 414 415config ALPHA_PYXIS 416 bool 417 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN 418 default y 419 420config ALPHA_EV6 421 bool 422 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL 423 default y 424 425config ALPHA_TSUNAMI 426 bool 427 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER 428 default y 429 430config ALPHA_EV67 431 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER 432 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL 433 help 434 Is this a machine based on the EV67 core? If in doubt, select N here 435 and the machine will be treated as an EV6. 436 437config ALPHA_MCPCIA 438 bool 439 depends on ALPHA_RAWHIDE 440 default y 441 442config ALPHA_POLARIS 443 bool 444 depends on ALPHA_RX164 445 default y 446 447config ALPHA_IRONGATE 448 bool 449 depends on ALPHA_NAUTILUS 450 default y 451 452config GENERIC_HWEIGHT 453 bool 454 default y if !ALPHA_EV67 455 456config ALPHA_AVANTI 457 bool 458 depends on ALPHA_XL || ALPHA_AVANTI_CH 459 default y 460 help 461 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based 462 Alphas. Info at 463 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>. 464 465config ALPHA_BROKEN_IRQ_MASK 466 bool 467 depends on ALPHA_GENERIC || ALPHA_PC164 468 default y 469 470config VGA_HOSE 471 bool 472 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI) 473 default y 474 help 475 Support VGA on an arbitrary hose; needed for several platforms 476 which always have multiple hoses, and whose consoles support it. 477 478 479config ALPHA_QEMU 480 bool "Run under QEMU emulation" 481 depends on !ALPHA_GENERIC 482 help 483 Assume the presence of special features supported by QEMU PALcode 484 that reduce the overhead of system emulation. 485 486 Generic kernels will auto-detect QEMU. But when building a 487 system-specific kernel, the assumption is that we want to 488 eliminate as many runtime tests as possible. 489 490 If unsure, say N. 491 492 493config ALPHA_SRM 494 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 495 depends on TTY 496 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 497 help 498 There are two different types of booting firmware on Alphas: SRM, 499 which is command line driven, and ARC, which uses menus and arrow 500 keys. Details about the Linux/Alpha booting process are contained in 501 the Linux/Alpha FAQ, accessible on the WWW from 502 <http://www.alphalinux.org/>. 503 504 The usual way to load Linux on an Alpha machine is to use MILO 505 (a bootloader that lets you pass command line parameters to the 506 kernel just like lilo does for the x86 architecture) which can be 507 loaded either from ARC or can be installed directly as a permanent 508 firmware replacement from floppy (which requires changing a certain 509 jumper on the motherboard). If you want to do either of these, say N 510 here. If MILO doesn't work on your system (true for Jensen 511 motherboards), you can bypass it altogether and boot Linux directly 512 from an SRM console; say Y here in order to do that. Note that you 513 won't be able to boot from an IDE disk using SRM. 514 515 If unsure, say N. 516 517config ARCH_MAY_HAVE_PC_FDC 518 def_bool y 519 520config SMP 521 bool "Symmetric multi-processing support" 522 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL 523 help 524 This enables support for systems with more than one CPU. If you have 525 a system with only one CPU, say N. If you have a system with more 526 than one CPU, say Y. 527 528 If you say N here, the kernel will run on uni- and multiprocessor 529 machines, but will use only one CPU of a multiprocessor machine. If 530 you say Y here, the kernel will run on many, but not all, 531 uniprocessor machines. On a uniprocessor machine, the kernel 532 will run faster if you say N here. 533 534 See also the SMP-HOWTO available at 535 <http://www.tldp.org/docs.html#howto>. 536 537 If you don't know what to do here, say N. 538 539config NR_CPUS 540 int "Maximum number of CPUs (2-32)" 541 range 2 32 542 depends on SMP 543 default "32" if ALPHA_GENERIC || ALPHA_MARVEL 544 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL 545 help 546 MARVEL support can handle a maximum of 32 CPUs, all the others 547 with working support have a maximum of 4 CPUs. 548 549config ARCH_SPARSEMEM_ENABLE 550 bool "Sparse Memory Support" 551 help 552 Say Y to support efficient handling of discontiguous physical memory, 553 for systems that have huge holes in the physical address space. 554 555config ALPHA_WTINT 556 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC 557 default y if ALPHA_QEMU 558 default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA) 559 default n if !ALPHA_SRM && !ALPHA_GENERIC 560 default y if SMP 561 help 562 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU 563 to sleep until the next interrupt. This may reduce the power 564 consumed, and the heat produced by the computer. However, it has 565 the side effect of making the cycle counter unreliable as a timing 566 device across the sleep. 567 568 For emulation under QEMU, definitely say Y here, as we have other 569 mechanisms for measuring time than the cycle counter. 570 571 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running 572 MILO, sleep mode is not supported so you might as well say N here. 573 574 For SMP systems we cannot use the cycle counter for timing anyway, 575 so you might as well say Y here. 576 577 If unsure, say N. 578 579# LARGE_VMALLOC is racy, if you *really* need it then fix it first 580config ALPHA_LARGE_VMALLOC 581 bool 582 help 583 Process creation and other aspects of virtual memory management can 584 be streamlined if we restrict the kernel to one PGD for all vmalloc 585 allocations. This equates to about 8GB. 586 587 Under normal circumstances, this is so far and above what is needed 588 as to be laughable. However, there are certain applications (such 589 as benchmark-grade in-kernel web serving) that can make use of as 590 much vmalloc space as is available. 591 592 Say N unless you know you need gobs and gobs of vmalloc space. 593 594config VERBOSE_MCHECK 595 bool "Verbose Machine Checks" 596 597config VERBOSE_MCHECK_ON 598 int "Verbose Printing Mode (0=off, 1=on, 2=all)" 599 depends on VERBOSE_MCHECK 600 default 1 601 help 602 This option allows the default printing mode to be set, and then 603 possibly overridden by a boot command argument. 604 605 For example, if one wanted the option of printing verbose 606 machine checks, but wanted the default to be as if verbose 607 machine check printing was turned off, then one would choose 608 the printing mode to be 0. Then, upon reboot, one could add 609 the boot command line "verbose_mcheck=1" to get the normal 610 verbose machine check printing, or "verbose_mcheck=2" to get 611 the maximum information available. 612 613 Take the default (1) unless you want more control or more info. 614 615choice 616 prompt "Timer interrupt frequency (HZ)?" 617 default HZ_128 if ALPHA_QEMU 618 default HZ_1200 if ALPHA_RAWHIDE 619 default HZ_1024 620 help 621 The frequency at which timer interrupts occur. A high frequency 622 minimizes latency, whereas a low frequency minimizes overhead of 623 process accounting. The later effect is especially significant 624 when being run under QEMU. 625 626 Note that some Alpha hardware cannot change the interrupt frequency 627 of the timer. If unsure, say 1024 (or 1200 for Rawhide). 628 629 config HZ_32 630 bool "32 Hz" 631 config HZ_64 632 bool "64 Hz" 633 config HZ_128 634 bool "128 Hz" 635 config HZ_256 636 bool "256 Hz" 637 config HZ_1024 638 bool "1024 Hz" 639 config HZ_1200 640 bool "1200 Hz" 641endchoice 642 643config HZ 644 int 645 default 32 if HZ_32 646 default 64 if HZ_64 647 default 128 if HZ_128 648 default 256 if HZ_256 649 default 1200 if HZ_1200 650 default 1024 651 652config SRM_ENV 653 tristate "SRM environment through procfs" 654 depends on PROC_FS 655 help 656 If you enable this option, a subdirectory inside /proc called 657 /proc/srm_environment will give you access to the all important 658 SRM environment variables (those which have a name) and also 659 to all others (by their internal number). 660 661 SRM is something like a BIOS for Alpha machines. There are some 662 other such BIOSes, like AlphaBIOS, which this driver cannot 663 support (hey, that's not SRM!). 664 665 Despite the fact that this driver doesn't work on all Alphas (but 666 only on those which have SRM as their firmware), it's save to 667 build it even if your particular machine doesn't know about SRM 668 (or if you intend to compile a generic kernel). It will simply 669 not create those subdirectory in /proc (and give you some warning, 670 of course). 671 672 This driver is also available as a module and will be called 673 srm_env then. 674 675endmenu 676 677# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig 678# but we also need it if VGA_HOSE is set 679config DUMMY_CONSOLE 680 bool 681 depends on VGA_HOSE 682 default y 683