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_PCSPKR_PLATFORM 18 select HAVE_PERF_EVENTS 19 select NEED_DMA_MAP_STATE 20 select NEED_SG_DMA_LENGTH 21 select VIRT_TO_BUS 22 select GENERIC_IRQ_PROBE 23 select GENERIC_PCI_IOMAP 24 select AUTO_IRQ_AFFINITY if SMP 25 select GENERIC_IRQ_SHOW 26 select ARCH_WANT_IPC_PARSE_VERSION 27 select ARCH_HAVE_NMI_SAFE_CMPXCHG 28 select AUDIT_ARCH 29 select GENERIC_CPU_VULNERABILITIES 30 select GENERIC_SMP_IDLE_THREAD 31 select HAVE_ARCH_AUDITSYSCALL 32 select HAVE_MOD_ARCH_SPECIFIC 33 select MODULES_USE_ELF_RELA 34 select ODD_RT_SIGACTION 35 select OLD_SIGSUSPEND 36 select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67 37 select MMU_GATHER_NO_RANGE 38 select SET_FS 39 select SPARSEMEM_EXTREME if SPARSEMEM 40 select ZONE_DMA 41 help 42 The Alpha is a 64-bit general-purpose processor designed and 43 marketed by the Digital Equipment Corporation of blessed memory, 44 now Hewlett-Packard. The Alpha Linux project has a home page at 45 <http://www.alphalinux.org/>. 46 47config 64BIT 48 def_bool y 49 50config MMU 51 bool 52 default y 53 54config ARCH_HAS_ILOG2_U32 55 bool 56 default n 57 58config ARCH_HAS_ILOG2_U64 59 bool 60 default n 61 62config GENERIC_CALIBRATE_DELAY 63 bool 64 default y 65 66config GENERIC_ISA_DMA 67 bool 68 default y 69 70config PGTABLE_LEVELS 71 int 72 default 3 73 74config AUDIT_ARCH 75 bool 76 77menu "System setup" 78 79choice 80 prompt "Alpha system type" 81 default ALPHA_GENERIC 82 help 83 This is the system type of your hardware. A "generic" kernel will 84 run on any supported Alpha system. However, if you configure a 85 kernel for your specific system, it will be faster and smaller. 86 87 To find out what type of Alpha system you have, you may want to 88 check out the Linux/Alpha FAQ, accessible on the WWW from 89 <http://www.alphalinux.org/>. In summary: 90 91 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366 92 Alpha-XL XL-233, XL-266 93 AlphaBook1 Alpha laptop 94 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400 95 Cabriolet AlphaPC64, AlphaPCI64 96 DP264 DP264 / DS20 / ES40 / DS10 / DS10L 97 EB164 EB164 21164 evaluation board 98 EB64+ EB64+ 21064 evaluation board 99 EB66 EB66 21066 evaluation board 100 EB66+ EB66+ 21066 evaluation board 101 Jensen DECpc 150, DEC 2000 models 300, 500 102 LX164 AlphaPC164-LX 103 Lynx AS 2100A 104 Miata Personal Workstation 433/500/600 a/au 105 Marvel AlphaServer ES47 / ES80 / GS1280 106 Mikasa AS 1000 107 Noname AXPpci33, UDB (Multia) 108 Noritake AS 1000A, AS 600A, AS 800 109 PC164 AlphaPC164 110 Rawhide AS 1200, AS 4000, AS 4100 111 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX 112 SX164 AlphaPC164-SX 113 Sable AS 2000, AS 2100 114 Shark DS 20L 115 Takara Takara (OEM) 116 Titan AlphaServer ES45 / DS25 / DS15 117 Wildfire AlphaServer GS 40/80/160/320 118 119 If you don't know what to do, choose "generic". 120 121config ALPHA_GENERIC 122 bool "Generic" 123 depends on TTY 124 select HAVE_EISA 125 help 126 A generic kernel will run on all supported Alpha hardware. 127 128config ALPHA_ALCOR 129 bool "Alcor/Alpha-XLT" 130 select HAVE_EISA 131 help 132 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data 133 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O 134 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM 135 controller (256-bit memory bus) and a PCI interface. It also does 136 all the work required to support an external Bcache and to maintain 137 memory coherence when a PCI device DMAs into (or out of) memory. 138 139config ALPHA_XL 140 bool "Alpha-XL" 141 help 142 XL-233 and XL-266-based Alpha systems. 143 144config ALPHA_BOOK1 145 bool "AlphaBook1" 146 help 147 Dec AlphaBook1/Burns Alpha-based laptops. 148 149config ALPHA_AVANTI_CH 150 bool "Avanti" 151 152config ALPHA_CABRIOLET 153 bool "Cabriolet" 154 help 155 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now 156 baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA 157 slots, 4 PCI slots (one pair are on a shared slot), uses plug-in 158 Bcache SIMMs. Requires power supply with 3.3V output. 159 160config ALPHA_DP264 161 bool "DP264" 162 help 163 Various 21264 systems with the tsunami core logic chipset. 164 API Networks: 264DP, UP2000(+), CS20; 165 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40. 166 167config ALPHA_EB164 168 bool "EB164" 169 help 170 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has 171 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is 172 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in 173 Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD, 174 MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized 175 motherboard. Requires power supply with 3.3V output. 176 177config ALPHA_EB64P_CH 178 bool "EB64+" 179 180config ALPHA_EB66 181 bool "EB66" 182 help 183 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is 184 identical to EB64+. Baby PC-AT size. Runs from standard PC power 185 supply. The EB66 schematic was published as a marketing poster 186 advertising the 21066 as "the first microprocessor in the world with 187 embedded PCI". 188 189config ALPHA_EB66P 190 bool "EB66+" 191 help 192 Later variant of the EB66 board. 193 194config ALPHA_EIGER 195 bool "Eiger" 196 help 197 Apparently an obscure OEM single-board computer based on the 198 Typhoon/Tsunami chipset family. Information on it is scanty. 199 200config ALPHA_JENSEN 201 bool "Jensen" 202 select HAVE_EISA 203 help 204 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one 205 of the first-generation Alpha systems. A number of these systems 206 seem to be available on the second- hand market. The Jensen is a 207 floor-standing tower system which originally used a 150MHz 21064 It 208 used programmable logic to interface a 486 EISA I/O bridge to the 209 CPU. 210 211config ALPHA_LX164 212 bool "LX164" 213 help 214 A technical overview of this board is available at 215 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>. 216 217config ALPHA_LYNX 218 bool "Lynx" 219 select HAVE_EISA 220 help 221 AlphaServer 2100A-based systems. 222 223config ALPHA_MARVEL 224 bool "Marvel" 225 help 226 AlphaServer ES47 / ES80 / GS1280 based on EV7. 227 228config ALPHA_MIATA 229 bool "Miata" 230 select HAVE_EISA 231 help 232 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a, 233 or 600au). 234 235config ALPHA_MIKASA 236 bool "Mikasa" 237 help 238 AlphaServer 1000-based Alpha systems. 239 240config ALPHA_NAUTILUS 241 bool "Nautilus" 242 help 243 Alpha systems based on the AMD 751 & ALI 1543C chipsets. 244 245config ALPHA_NONAME_CH 246 bool "Noname" 247 248config ALPHA_NORITAKE 249 bool "Noritake" 250 select HAVE_EISA 251 help 252 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based 253 systems. 254 255config ALPHA_PC164 256 bool "PC164" 257 258config ALPHA_P2K 259 bool "Platform2000" 260 261config ALPHA_RAWHIDE 262 bool "Rawhide" 263 select HAVE_EISA 264 help 265 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines. 266 See HOWTO at 267 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>. 268 269config ALPHA_RUFFIAN 270 bool "Ruffian" 271 help 272 Samsung APC164UX. There is a page on known problems and workarounds 273 at <http://www.alphalinux.org/faq/FAQ-11.html>. 274 275config ALPHA_RX164 276 bool "RX164" 277 278config ALPHA_SX164 279 bool "SX164" 280 281config ALPHA_SABLE 282 bool "Sable" 283 select HAVE_EISA 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 ALPHA_NONAME 325 bool 326 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH 327 default y 328 help 329 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia 330 UDB). This design was produced by Digital's Technical OEM (TOEM) 331 group. It uses the 21066 processor running at 166MHz or 233MHz. It 332 is a baby-AT size, and runs from a standard PC power supply. It has 333 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are 334 2 versions, with either PS/2 or large DIN connectors for the 335 keyboard. 336 337config ALPHA_EV4 338 bool 339 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 340 default y if !ALPHA_LYNX 341 342config ALPHA_LCA 343 bool 344 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K 345 default y 346 347config ALPHA_APECS 348 bool 349 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL 350 default y 351 352config ALPHA_EB64P 353 bool 354 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH 355 default y 356 help 357 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA, 358 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs. 359 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI 360 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style), 361 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size. 362 Runs from standard PC power supply. 363 364config ALPHA_EV5 365 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX 366 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 367 368config ALPHA_EV4 369 bool 370 default y if ALPHA_LYNX && !ALPHA_EV5 371 372config ALPHA_CIA 373 bool 374 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 375 default y 376 377config ALPHA_EV56 378 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR 379 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA 380 381config ALPHA_EV56 382 prompt "EV56 CPU (speed >= 333MHz)?" 383 depends on ALPHA_NORITAKE || ALPHA_PRIMO 384 385config ALPHA_EV56 386 prompt "EV56 CPU (speed >= 400MHz)?" 387 depends on ALPHA_RAWHIDE 388 389config ALPHA_PRIMO 390 bool "EV5 CPU daughtercard (model 5/xxx)?" 391 depends on ALPHA_NORITAKE || ALPHA_MIKASA 392 help 393 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx. 394 395config ALPHA_GAMMA 396 bool "EV5 CPU(s) (model 5/xxx)?" 397 depends on ALPHA_SABLE 398 help 399 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx. 400 401config ALPHA_GAMMA 402 bool 403 depends on ALPHA_LYNX 404 default y 405 406config ALPHA_T2 407 bool 408 depends on ALPHA_SABLE || ALPHA_LYNX 409 default y 410 411config ALPHA_PYXIS 412 bool 413 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN 414 default y 415 416config ALPHA_EV6 417 bool 418 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL 419 default y 420 421config ALPHA_TSUNAMI 422 bool 423 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER 424 default y 425 426config ALPHA_EV67 427 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER 428 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL 429 help 430 Is this a machine based on the EV67 core? If in doubt, select N here 431 and the machine will be treated as an EV6. 432 433config ALPHA_MCPCIA 434 bool 435 depends on ALPHA_RAWHIDE 436 default y 437 438config ALPHA_POLARIS 439 bool 440 depends on ALPHA_RX164 441 default y 442 443config ALPHA_IRONGATE 444 bool 445 depends on ALPHA_NAUTILUS 446 default y 447 448config GENERIC_HWEIGHT 449 bool 450 default y if !ALPHA_EV67 451 452config ALPHA_AVANTI 453 bool 454 depends on ALPHA_XL || ALPHA_AVANTI_CH 455 default y 456 help 457 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based 458 Alphas. Info at 459 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>. 460 461config ALPHA_BROKEN_IRQ_MASK 462 bool 463 depends on ALPHA_GENERIC || ALPHA_PC164 464 default y 465 466config VGA_HOSE 467 bool 468 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI) 469 default y 470 help 471 Support VGA on an arbitrary hose; needed for several platforms 472 which always have multiple hoses, and whose consoles support it. 473 474 475config ALPHA_QEMU 476 bool "Run under QEMU emulation" 477 depends on !ALPHA_GENERIC 478 help 479 Assume the presence of special features supported by QEMU PALcode 480 that reduce the overhead of system emulation. 481 482 Generic kernels will auto-detect QEMU. But when building a 483 system-specific kernel, the assumption is that we want to 484 eliminate as many runtime tests as possible. 485 486 If unsure, say N. 487 488 489config ALPHA_SRM 490 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 491 depends on TTY 492 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 493 help 494 There are two different types of booting firmware on Alphas: SRM, 495 which is command line driven, and ARC, which uses menus and arrow 496 keys. Details about the Linux/Alpha booting process are contained in 497 the Linux/Alpha FAQ, accessible on the WWW from 498 <http://www.alphalinux.org/>. 499 500 The usual way to load Linux on an Alpha machine is to use MILO 501 (a bootloader that lets you pass command line parameters to the 502 kernel just like lilo does for the x86 architecture) which can be 503 loaded either from ARC or can be installed directly as a permanent 504 firmware replacement from floppy (which requires changing a certain 505 jumper on the motherboard). If you want to do either of these, say N 506 here. If MILO doesn't work on your system (true for Jensen 507 motherboards), you can bypass it altogether and boot Linux directly 508 from an SRM console; say Y here in order to do that. Note that you 509 won't be able to boot from an IDE disk using SRM. 510 511 If unsure, say N. 512 513config ARCH_MAY_HAVE_PC_FDC 514 def_bool y 515 516config SMP 517 bool "Symmetric multi-processing support" 518 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL 519 help 520 This enables support for systems with more than one CPU. If you have 521 a system with only one CPU, say N. If you have a system with more 522 than one CPU, say Y. 523 524 If you say N here, the kernel will run on uni- and multiprocessor 525 machines, but will use only one CPU of a multiprocessor machine. If 526 you say Y here, the kernel will run on many, but not all, 527 uniprocessor machines. On a uniprocessor machine, the kernel 528 will run faster if you say N here. 529 530 See also the SMP-HOWTO available at 531 <https://www.tldp.org/docs.html#howto>. 532 533 If you don't know what to do here, say N. 534 535config NR_CPUS 536 int "Maximum number of CPUs (2-32)" 537 range 2 32 538 depends on SMP 539 default "32" if ALPHA_GENERIC || ALPHA_MARVEL 540 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL 541 help 542 MARVEL support can handle a maximum of 32 CPUs, all the others 543 with working support have a maximum of 4 CPUs. 544 545config ARCH_SPARSEMEM_ENABLE 546 bool "Sparse Memory Support" 547 help 548 Say Y to support efficient handling of discontiguous physical memory, 549 for systems that have huge holes in the physical address space. 550 551config ALPHA_WTINT 552 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC 553 default y if ALPHA_QEMU 554 default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA) 555 default n if !ALPHA_SRM && !ALPHA_GENERIC 556 default y if SMP 557 help 558 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU 559 to sleep until the next interrupt. This may reduce the power 560 consumed, and the heat produced by the computer. However, it has 561 the side effect of making the cycle counter unreliable as a timing 562 device across the sleep. 563 564 For emulation under QEMU, definitely say Y here, as we have other 565 mechanisms for measuring time than the cycle counter. 566 567 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running 568 MILO, sleep mode is not supported so you might as well say N here. 569 570 For SMP systems we cannot use the cycle counter for timing anyway, 571 so you might as well say Y here. 572 573 If unsure, say N. 574 575# LARGE_VMALLOC is racy, if you *really* need it then fix it first 576config ALPHA_LARGE_VMALLOC 577 bool 578 help 579 Process creation and other aspects of virtual memory management can 580 be streamlined if we restrict the kernel to one PGD for all vmalloc 581 allocations. This equates to about 8GB. 582 583 Under normal circumstances, this is so far and above what is needed 584 as to be laughable. However, there are certain applications (such 585 as benchmark-grade in-kernel web serving) that can make use of as 586 much vmalloc space as is available. 587 588 Say N unless you know you need gobs and gobs of vmalloc space. 589 590config VERBOSE_MCHECK 591 bool "Verbose Machine Checks" 592 593config VERBOSE_MCHECK_ON 594 int "Verbose Printing Mode (0=off, 1=on, 2=all)" 595 depends on VERBOSE_MCHECK 596 default 1 597 help 598 This option allows the default printing mode to be set, and then 599 possibly overridden by a boot command argument. 600 601 For example, if one wanted the option of printing verbose 602 machine checks, but wanted the default to be as if verbose 603 machine check printing was turned off, then one would choose 604 the printing mode to be 0. Then, upon reboot, one could add 605 the boot command line "verbose_mcheck=1" to get the normal 606 verbose machine check printing, or "verbose_mcheck=2" to get 607 the maximum information available. 608 609 Take the default (1) unless you want more control or more info. 610 611choice 612 prompt "Timer interrupt frequency (HZ)?" 613 default HZ_128 if ALPHA_QEMU 614 default HZ_1200 if ALPHA_RAWHIDE 615 default HZ_1024 616 help 617 The frequency at which timer interrupts occur. A high frequency 618 minimizes latency, whereas a low frequency minimizes overhead of 619 process accounting. The later effect is especially significant 620 when being run under QEMU. 621 622 Note that some Alpha hardware cannot change the interrupt frequency 623 of the timer. If unsure, say 1024 (or 1200 for Rawhide). 624 625 config HZ_32 626 bool "32 Hz" 627 config HZ_64 628 bool "64 Hz" 629 config HZ_128 630 bool "128 Hz" 631 config HZ_256 632 bool "256 Hz" 633 config HZ_1024 634 bool "1024 Hz" 635 config HZ_1200 636 bool "1200 Hz" 637endchoice 638 639config HZ 640 int 641 default 32 if HZ_32 642 default 64 if HZ_64 643 default 128 if HZ_128 644 default 256 if HZ_256 645 default 1200 if HZ_1200 646 default 1024 647 648config SRM_ENV 649 tristate "SRM environment through procfs" 650 depends on PROC_FS 651 help 652 If you enable this option, a subdirectory inside /proc called 653 /proc/srm_environment will give you access to the all important 654 SRM environment variables (those which have a name) and also 655 to all others (by their internal number). 656 657 SRM is something like a BIOS for Alpha machines. There are some 658 other such BIOSes, like AlphaBIOS, which this driver cannot 659 support (hey, that's not SRM!). 660 661 Despite the fact that this driver doesn't work on all Alphas (but 662 only on those which have SRM as their firmware), it's save to 663 build it even if your particular machine doesn't know about SRM 664 (or if you intend to compile a generic kernel). It will simply 665 not create those subdirectory in /proc (and give you some warning, 666 of course). 667 668 This driver is also available as a module and will be called 669 srm_env then. 670 671endmenu 672 673# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig 674# but we also need it if VGA_HOSE is set 675config DUMMY_CONSOLE 676 bool 677 depends on VGA_HOSE 678 default y 679