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