Kconfig (20629B)
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_ASM_MODVERSIONS 16 select HAVE_PCSPKR_PLATFORM 17 select HAVE_PERF_EVENTS 18 select NEED_DMA_MAP_STATE 19 select NEED_SG_DMA_LENGTH 20 select VIRT_TO_BUS 21 select GENERIC_IRQ_PROBE 22 select GENERIC_PCI_IOMAP 23 select AUTO_IRQ_AFFINITY if SMP 24 select GENERIC_IRQ_SHOW 25 select ARCH_WANT_IPC_PARSE_VERSION 26 select ARCH_HAVE_NMI_SAFE_CMPXCHG 27 select AUDIT_ARCH 28 select GENERIC_CPU_VULNERABILITIES 29 select GENERIC_SMP_IDLE_THREAD 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 select MMU_GATHER_NO_RANGE 37 select SPARSEMEM_EXTREME if SPARSEMEM 38 select ZONE_DMA 39 help 40 The Alpha is a 64-bit general-purpose processor designed and 41 marketed by the Digital Equipment Corporation of blessed memory, 42 now Hewlett-Packard. The Alpha Linux project has a home page at 43 <http://www.alphalinux.org/>. 44 45config 64BIT 46 def_bool y 47 48config MMU 49 bool 50 default y 51 52config ARCH_HAS_ILOG2_U32 53 bool 54 default n 55 56config ARCH_HAS_ILOG2_U64 57 bool 58 default n 59 60config GENERIC_CALIBRATE_DELAY 61 bool 62 default y 63 64config GENERIC_ISA_DMA 65 bool 66 default y 67 68config PGTABLE_LEVELS 69 int 70 default 3 71 72config AUDIT_ARCH 73 bool 74 75menu "System setup" 76 77choice 78 prompt "Alpha system type" 79 default ALPHA_GENERIC 80 help 81 This is the system type of your hardware. A "generic" kernel will 82 run on any supported Alpha system. However, if you configure a 83 kernel for your specific system, it will be faster and smaller. 84 85 To find out what type of Alpha system you have, you may want to 86 check out the Linux/Alpha FAQ, accessible on the WWW from 87 <http://www.alphalinux.org/>. In summary: 88 89 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366 90 Alpha-XL XL-233, XL-266 91 AlphaBook1 Alpha laptop 92 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400 93 Cabriolet AlphaPC64, AlphaPCI64 94 DP264 DP264 / DS20 / ES40 / DS10 / DS10L 95 EB164 EB164 21164 evaluation board 96 EB64+ EB64+ 21064 evaluation board 97 EB66 EB66 21066 evaluation board 98 EB66+ EB66+ 21066 evaluation board 99 Jensen DECpc 150, DEC 2000 models 300, 500 100 LX164 AlphaPC164-LX 101 Lynx AS 2100A 102 Miata Personal Workstation 433/500/600 a/au 103 Marvel AlphaServer ES47 / ES80 / GS1280 104 Mikasa AS 1000 105 Noname AXPpci33, UDB (Multia) 106 Noritake AS 1000A, AS 600A, AS 800 107 PC164 AlphaPC164 108 Rawhide AS 1200, AS 4000, AS 4100 109 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX 110 SX164 AlphaPC164-SX 111 Sable AS 2000, AS 2100 112 Shark DS 20L 113 Takara Takara (OEM) 114 Titan AlphaServer ES45 / DS25 / DS15 115 Wildfire AlphaServer GS 40/80/160/320 116 117 If you don't know what to do, choose "generic". 118 119config ALPHA_GENERIC 120 bool "Generic" 121 depends on TTY 122 select HAVE_EISA 123 help 124 A generic kernel will run on all supported Alpha hardware. 125 126config ALPHA_ALCOR 127 bool "Alcor/Alpha-XLT" 128 select HAVE_EISA 129 help 130 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data 131 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O 132 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM 133 controller (256-bit memory bus) and a PCI interface. It also does 134 all the work required to support an external Bcache and to maintain 135 memory coherence when a PCI device DMAs into (or out of) memory. 136 137config ALPHA_XL 138 bool "Alpha-XL" 139 help 140 XL-233 and XL-266-based Alpha systems. 141 142config ALPHA_BOOK1 143 bool "AlphaBook1" 144 help 145 Dec AlphaBook1/Burns Alpha-based laptops. 146 147config ALPHA_AVANTI_CH 148 bool "Avanti" 149 150config ALPHA_CABRIOLET 151 bool "Cabriolet" 152 help 153 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now 154 baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA 155 slots, 4 PCI slots (one pair are on a shared slot), uses plug-in 156 Bcache SIMMs. Requires power supply with 3.3V output. 157 158config ALPHA_DP264 159 bool "DP264" 160 help 161 Various 21264 systems with the tsunami core logic chipset. 162 API Networks: 264DP, UP2000(+), CS20; 163 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40. 164 165config ALPHA_EB164 166 bool "EB164" 167 help 168 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has 169 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is 170 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in 171 Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD, 172 MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized 173 motherboard. Requires power supply with 3.3V output. 174 175config ALPHA_EB64P_CH 176 bool "EB64+" 177 178config ALPHA_EB66 179 bool "EB66" 180 help 181 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is 182 identical to EB64+. Baby PC-AT size. Runs from standard PC power 183 supply. The EB66 schematic was published as a marketing poster 184 advertising the 21066 as "the first microprocessor in the world with 185 embedded PCI". 186 187config ALPHA_EB66P 188 bool "EB66+" 189 help 190 Later variant of the EB66 board. 191 192config ALPHA_EIGER 193 bool "Eiger" 194 help 195 Apparently an obscure OEM single-board computer based on the 196 Typhoon/Tsunami chipset family. Information on it is scanty. 197 198config ALPHA_JENSEN 199 bool "Jensen" 200 select HAVE_EISA 201 help 202 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one 203 of the first-generation Alpha systems. A number of these systems 204 seem to be available on the second- hand market. The Jensen is a 205 floor-standing tower system which originally used a 150MHz 21064 It 206 used programmable logic to interface a 486 EISA I/O bridge to the 207 CPU. 208 209config ALPHA_LX164 210 bool "LX164" 211 help 212 A technical overview of this board is available at 213 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>. 214 215config ALPHA_LYNX 216 bool "Lynx" 217 select HAVE_EISA 218 help 219 AlphaServer 2100A-based systems. 220 221config ALPHA_MARVEL 222 bool "Marvel" 223 help 224 AlphaServer ES47 / ES80 / GS1280 based on EV7. 225 226config ALPHA_MIATA 227 bool "Miata" 228 select HAVE_EISA 229 help 230 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a, 231 or 600au). 232 233config ALPHA_MIKASA 234 bool "Mikasa" 235 help 236 AlphaServer 1000-based Alpha systems. 237 238config ALPHA_NAUTILUS 239 bool "Nautilus" 240 help 241 Alpha systems based on the AMD 751 & ALI 1543C chipsets. 242 243config ALPHA_NONAME_CH 244 bool "Noname" 245 246config ALPHA_NORITAKE 247 bool "Noritake" 248 select HAVE_EISA 249 help 250 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based 251 systems. 252 253config ALPHA_PC164 254 bool "PC164" 255 256config ALPHA_P2K 257 bool "Platform2000" 258 259config ALPHA_RAWHIDE 260 bool "Rawhide" 261 select HAVE_EISA 262 help 263 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines. 264 See HOWTO at 265 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>. 266 267config ALPHA_RUFFIAN 268 bool "Ruffian" 269 help 270 Samsung APC164UX. There is a page on known problems and workarounds 271 at <http://www.alphalinux.org/faq/FAQ-11.html>. 272 273config ALPHA_RX164 274 bool "RX164" 275 276config ALPHA_SX164 277 bool "SX164" 278 279config ALPHA_SABLE 280 bool "Sable" 281 select HAVE_EISA 282 help 283 Digital AlphaServer 2000 and 2100-based systems. 284 285config ALPHA_SHARK 286 bool "Shark" 287 288config ALPHA_TAKARA 289 bool "Takara" 290 help 291 Alpha 11164-based OEM single-board computer. 292 293config ALPHA_TITAN 294 bool "Titan" 295 help 296 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset. 297 298config ALPHA_WILDFIRE 299 bool "Wildfire" 300 help 301 AlphaServer GS 40/80/160/320 SMP based on the EV67 core. 302 303endchoice 304 305# clear all implied options (don't want default values for those): 306# Most of these machines have ISA slots; not exactly sure which don't, 307# and this doesn't activate hordes of code, so do it always. 308config ISA 309 bool 310 default y 311 help 312 Find out whether you have ISA slots on your motherboard. ISA is the 313 name of a bus system, i.e. the way the CPU talks to the other stuff 314 inside your box. Other bus systems are PCI, EISA, MicroChannel 315 (MCA) or VESA. ISA is an older system, now being displaced by PCI; 316 newer boards don't support it. If you have ISA, say Y, otherwise N. 317 318config ISA_DMA_API 319 bool 320 default y 321 322config ALPHA_NONAME 323 bool 324 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH 325 default y 326 help 327 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia 328 UDB). This design was produced by Digital's Technical OEM (TOEM) 329 group. It uses the 21066 processor running at 166MHz or 233MHz. It 330 is a baby-AT size, and runs from a standard PC power supply. It has 331 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are 332 2 versions, with either PS/2 or large DIN connectors for the 333 keyboard. 334 335config ALPHA_EV4 336 bool 337 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 338 default y if !ALPHA_LYNX 339 340config ALPHA_LCA 341 bool 342 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K 343 default y 344 345config ALPHA_APECS 346 bool 347 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL 348 default y 349 350config ALPHA_EB64P 351 bool 352 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH 353 default y 354 help 355 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA, 356 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs. 357 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI 358 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style), 359 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size. 360 Runs from standard PC power supply. 361 362config ALPHA_EV5 363 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX 364 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 365 366config ALPHA_EV4 367 bool 368 default y if ALPHA_LYNX && !ALPHA_EV5 369 370config ALPHA_CIA 371 bool 372 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 373 default y 374 375config ALPHA_EV56 376 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR 377 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA 378 379config ALPHA_EV56 380 prompt "EV56 CPU (speed >= 333MHz)?" 381 depends on ALPHA_NORITAKE || ALPHA_PRIMO 382 383config ALPHA_EV56 384 prompt "EV56 CPU (speed >= 400MHz)?" 385 depends on ALPHA_RAWHIDE 386 387config ALPHA_PRIMO 388 bool "EV5 CPU daughtercard (model 5/xxx)?" 389 depends on ALPHA_NORITAKE || ALPHA_MIKASA 390 help 391 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx. 392 393config ALPHA_GAMMA 394 bool "EV5 CPU(s) (model 5/xxx)?" 395 depends on ALPHA_SABLE 396 help 397 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx. 398 399config ALPHA_GAMMA 400 bool 401 depends on ALPHA_LYNX 402 default y 403 404config ALPHA_T2 405 bool 406 depends on ALPHA_SABLE || ALPHA_LYNX 407 default y 408 409config ALPHA_PYXIS 410 bool 411 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN 412 default y 413 414config ALPHA_EV6 415 bool 416 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL 417 default y 418 419config ALPHA_TSUNAMI 420 bool 421 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER 422 default y 423 424config ALPHA_EV67 425 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER 426 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL 427 help 428 Is this a machine based on the EV67 core? If in doubt, select N here 429 and the machine will be treated as an EV6. 430 431config ALPHA_MCPCIA 432 bool 433 depends on ALPHA_RAWHIDE 434 default y 435 436config ALPHA_POLARIS 437 bool 438 depends on ALPHA_RX164 439 default y 440 441config ALPHA_IRONGATE 442 bool 443 depends on ALPHA_NAUTILUS 444 default y 445 446config GENERIC_HWEIGHT 447 bool 448 default y if !ALPHA_EV67 449 450config ALPHA_AVANTI 451 bool 452 depends on ALPHA_XL || ALPHA_AVANTI_CH 453 default y 454 help 455 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based 456 Alphas. Info at 457 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>. 458 459config ALPHA_BROKEN_IRQ_MASK 460 bool 461 depends on ALPHA_GENERIC || ALPHA_PC164 462 default y 463 464config VGA_HOSE 465 bool 466 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI) 467 default y 468 help 469 Support VGA on an arbitrary hose; needed for several platforms 470 which always have multiple hoses, and whose consoles support it. 471 472 473config ALPHA_QEMU 474 bool "Run under QEMU emulation" 475 depends on !ALPHA_GENERIC 476 help 477 Assume the presence of special features supported by QEMU PALcode 478 that reduce the overhead of system emulation. 479 480 Generic kernels will auto-detect QEMU. But when building a 481 system-specific kernel, the assumption is that we want to 482 eliminate as many runtime tests as possible. 483 484 If unsure, say N. 485 486 487config ALPHA_SRM 488 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 489 depends on TTY 490 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 491 help 492 There are two different types of booting firmware on Alphas: SRM, 493 which is command line driven, and ARC, which uses menus and arrow 494 keys. Details about the Linux/Alpha booting process are contained in 495 the Linux/Alpha FAQ, accessible on the WWW from 496 <http://www.alphalinux.org/>. 497 498 The usual way to load Linux on an Alpha machine is to use MILO 499 (a bootloader that lets you pass command line parameters to the 500 kernel just like lilo does for the x86 architecture) which can be 501 loaded either from ARC or can be installed directly as a permanent 502 firmware replacement from floppy (which requires changing a certain 503 jumper on the motherboard). If you want to do either of these, say N 504 here. If MILO doesn't work on your system (true for Jensen 505 motherboards), you can bypass it altogether and boot Linux directly 506 from an SRM console; say Y here in order to do that. Note that you 507 won't be able to boot from an IDE disk using SRM. 508 509 If unsure, say N. 510 511config ARCH_MAY_HAVE_PC_FDC 512 def_bool y 513 514config SMP 515 bool "Symmetric multi-processing support" 516 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL 517 help 518 This enables support for systems with more than one CPU. If you have 519 a system with only one CPU, say N. If you have a system with more 520 than one CPU, say Y. 521 522 If you say N here, the kernel will run on uni- and multiprocessor 523 machines, but will use only one CPU of a multiprocessor machine. If 524 you say Y here, the kernel will run on many, but not all, 525 uniprocessor machines. On a uniprocessor machine, the kernel 526 will run faster if you say N here. 527 528 See also the SMP-HOWTO available at 529 <https://www.tldp.org/docs.html#howto>. 530 531 If you don't know what to do here, say N. 532 533config NR_CPUS 534 int "Maximum number of CPUs (2-32)" 535 range 2 32 536 depends on SMP 537 default "32" if ALPHA_GENERIC || ALPHA_MARVEL 538 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL 539 help 540 MARVEL support can handle a maximum of 32 CPUs, all the others 541 with working support have a maximum of 4 CPUs. 542 543config ARCH_SPARSEMEM_ENABLE 544 bool "Sparse Memory Support" 545 help 546 Say Y to support efficient handling of discontiguous physical memory, 547 for systems that have huge holes in the physical address space. 548 549config ALPHA_WTINT 550 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC 551 default y if ALPHA_QEMU 552 default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA) 553 default n if !ALPHA_SRM && !ALPHA_GENERIC 554 default y if SMP 555 help 556 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU 557 to sleep until the next interrupt. This may reduce the power 558 consumed, and the heat produced by the computer. However, it has 559 the side effect of making the cycle counter unreliable as a timing 560 device across the sleep. 561 562 For emulation under QEMU, definitely say Y here, as we have other 563 mechanisms for measuring time than the cycle counter. 564 565 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running 566 MILO, sleep mode is not supported so you might as well say N here. 567 568 For SMP systems we cannot use the cycle counter for timing anyway, 569 so you might as well say Y here. 570 571 If unsure, say N. 572 573# LARGE_VMALLOC is racy, if you *really* need it then fix it first 574config ALPHA_LARGE_VMALLOC 575 bool 576 help 577 Process creation and other aspects of virtual memory management can 578 be streamlined if we restrict the kernel to one PGD for all vmalloc 579 allocations. This equates to about 8GB. 580 581 Under normal circumstances, this is so far and above what is needed 582 as to be laughable. However, there are certain applications (such 583 as benchmark-grade in-kernel web serving) that can make use of as 584 much vmalloc space as is available. 585 586 Say N unless you know you need gobs and gobs of vmalloc space. 587 588config VERBOSE_MCHECK 589 bool "Verbose Machine Checks" 590 591config VERBOSE_MCHECK_ON 592 int "Verbose Printing Mode (0=off, 1=on, 2=all)" 593 depends on VERBOSE_MCHECK 594 default 1 595 help 596 This option allows the default printing mode to be set, and then 597 possibly overridden by a boot command argument. 598 599 For example, if one wanted the option of printing verbose 600 machine checks, but wanted the default to be as if verbose 601 machine check printing was turned off, then one would choose 602 the printing mode to be 0. Then, upon reboot, one could add 603 the boot command line "verbose_mcheck=1" to get the normal 604 verbose machine check printing, or "verbose_mcheck=2" to get 605 the maximum information available. 606 607 Take the default (1) unless you want more control or more info. 608 609choice 610 prompt "Timer interrupt frequency (HZ)?" 611 default HZ_128 if ALPHA_QEMU 612 default HZ_1200 if ALPHA_RAWHIDE 613 default HZ_1024 614 help 615 The frequency at which timer interrupts occur. A high frequency 616 minimizes latency, whereas a low frequency minimizes overhead of 617 process accounting. The later effect is especially significant 618 when being run under QEMU. 619 620 Note that some Alpha hardware cannot change the interrupt frequency 621 of the timer. If unsure, say 1024 (or 1200 for Rawhide). 622 623 config HZ_32 624 bool "32 Hz" 625 config HZ_64 626 bool "64 Hz" 627 config HZ_128 628 bool "128 Hz" 629 config HZ_256 630 bool "256 Hz" 631 config HZ_1024 632 bool "1024 Hz" 633 config HZ_1200 634 bool "1200 Hz" 635endchoice 636 637config HZ 638 int 639 default 32 if HZ_32 640 default 64 if HZ_64 641 default 128 if HZ_128 642 default 256 if HZ_256 643 default 1200 if HZ_1200 644 default 1024 645 646config SRM_ENV 647 tristate "SRM environment through procfs" 648 depends on PROC_FS 649 help 650 If you enable this option, a subdirectory inside /proc called 651 /proc/srm_environment will give you access to the all important 652 SRM environment variables (those which have a name) and also 653 to all others (by their internal number). 654 655 SRM is something like a BIOS for Alpha machines. There are some 656 other such BIOSes, like AlphaBIOS, which this driver cannot 657 support (hey, that's not SRM!). 658 659 Despite the fact that this driver doesn't work on all Alphas (but 660 only on those which have SRM as their firmware), it's save to 661 build it even if your particular machine doesn't know about SRM 662 (or if you intend to compile a generic kernel). It will simply 663 not create those subdirectory in /proc (and give you some warning, 664 of course). 665 666 This driver is also available as a module and will be called 667 srm_env then. 668 669endmenu 670 671# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig 672# but we also need it if VGA_HOSE is set 673config DUMMY_CONSOLE 674 bool 675 depends on VGA_HOSE 676 default y