Kconfig 20 KB

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  1. # SPDX-License-Identifier: GPL-2.0
  2. config 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 LOCK_MM_AND_FIND_VMA
  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. config 64BIT
  45. def_bool y
  46. config MMU
  47. bool
  48. default y
  49. config ARCH_HAS_ILOG2_U32
  50. bool
  51. default n
  52. config ARCH_HAS_ILOG2_U64
  53. bool
  54. default n
  55. config GENERIC_CALIBRATE_DELAY
  56. bool
  57. default y
  58. config GENERIC_ISA_DMA
  59. bool
  60. default y
  61. config PGTABLE_LEVELS
  62. int
  63. default 3
  64. config AUDIT_ARCH
  65. bool
  66. menu "System setup"
  67. choice
  68. prompt "Alpha system type"
  69. default ALPHA_GENERIC
  70. help
  71. This is the system type of your hardware. A "generic" kernel will
  72. run on any supported Alpha system. However, if you configure a
  73. kernel for your specific system, it will be faster and smaller.
  74. To find out what type of Alpha system you have, you may want to
  75. check out the Linux/Alpha FAQ, accessible on the WWW from
  76. <http://www.alphalinux.org/>. In summary:
  77. Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
  78. Alpha-XL XL-233, XL-266
  79. AlphaBook1 Alpha laptop
  80. Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
  81. Cabriolet AlphaPC64, AlphaPCI64
  82. DP264 DP264 / DS20 / ES40 / DS10 / DS10L
  83. EB164 EB164 21164 evaluation board
  84. EB64+ EB64+ 21064 evaluation board
  85. EB66 EB66 21066 evaluation board
  86. EB66+ EB66+ 21066 evaluation board
  87. Jensen DECpc 150, DEC 2000 models 300, 500
  88. LX164 AlphaPC164-LX
  89. Lynx AS 2100A
  90. Miata Personal Workstation 433/500/600 a/au
  91. Marvel AlphaServer ES47 / ES80 / GS1280
  92. Mikasa AS 1000
  93. Noname AXPpci33, UDB (Multia)
  94. Noritake AS 1000A, AS 600A, AS 800
  95. PC164 AlphaPC164
  96. Rawhide AS 1200, AS 4000, AS 4100
  97. Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
  98. SX164 AlphaPC164-SX
  99. Sable AS 2000, AS 2100
  100. Shark DS 20L
  101. Takara Takara (OEM)
  102. Titan AlphaServer ES45 / DS25 / DS15
  103. Wildfire AlphaServer GS 40/80/160/320
  104. If you don't know what to do, choose "generic".
  105. config ALPHA_GENERIC
  106. bool "Generic"
  107. depends on TTY
  108. select HAVE_EISA
  109. help
  110. A generic kernel will run on all supported Alpha hardware.
  111. config ALPHA_ALCOR
  112. bool "Alcor/Alpha-XLT"
  113. select HAVE_EISA
  114. help
  115. For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
  116. slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
  117. Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
  118. controller (256-bit memory bus) and a PCI interface. It also does
  119. all the work required to support an external Bcache and to maintain
  120. memory coherence when a PCI device DMAs into (or out of) memory.
  121. config ALPHA_XL
  122. bool "Alpha-XL"
  123. help
  124. XL-233 and XL-266-based Alpha systems.
  125. config ALPHA_BOOK1
  126. bool "AlphaBook1"
  127. help
  128. Dec AlphaBook1/Burns Alpha-based laptops.
  129. config ALPHA_AVANTI_CH
  130. bool "Avanti"
  131. config ALPHA_CABRIOLET
  132. bool "Cabriolet"
  133. help
  134. Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now
  135. baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
  136. slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
  137. Bcache SIMMs. Requires power supply with 3.3V output.
  138. config ALPHA_DP264
  139. bool "DP264"
  140. help
  141. Various 21264 systems with the tsunami core logic chipset.
  142. API Networks: 264DP, UP2000(+), CS20;
  143. Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
  144. config ALPHA_EB164
  145. bool "EB164"
  146. help
  147. EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has
  148. ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
  149. shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in
  150. Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
  151. MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized
  152. motherboard. Requires power supply with 3.3V output.
  153. config ALPHA_EB64P_CH
  154. bool "EB64+"
  155. config ALPHA_EB66
  156. bool "EB66"
  157. help
  158. A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is
  159. identical to EB64+. Baby PC-AT size. Runs from standard PC power
  160. supply. The EB66 schematic was published as a marketing poster
  161. advertising the 21066 as "the first microprocessor in the world with
  162. embedded PCI".
  163. config ALPHA_EB66P
  164. bool "EB66+"
  165. help
  166. Later variant of the EB66 board.
  167. config ALPHA_EIGER
  168. bool "Eiger"
  169. help
  170. Apparently an obscure OEM single-board computer based on the
  171. Typhoon/Tsunami chipset family. Information on it is scanty.
  172. config ALPHA_JENSEN
  173. bool "Jensen"
  174. select HAVE_EISA
  175. help
  176. DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
  177. of the first-generation Alpha systems. A number of these systems
  178. seem to be available on the second- hand market. The Jensen is a
  179. floor-standing tower system which originally used a 150MHz 21064 It
  180. used programmable logic to interface a 486 EISA I/O bridge to the
  181. CPU.
  182. config ALPHA_LX164
  183. bool "LX164"
  184. help
  185. A technical overview of this board is available at
  186. <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
  187. config ALPHA_LYNX
  188. bool "Lynx"
  189. select HAVE_EISA
  190. help
  191. AlphaServer 2100A-based systems.
  192. config ALPHA_MARVEL
  193. bool "Marvel"
  194. help
  195. AlphaServer ES47 / ES80 / GS1280 based on EV7.
  196. config ALPHA_MIATA
  197. bool "Miata"
  198. select HAVE_EISA
  199. help
  200. The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
  201. or 600au).
  202. config ALPHA_MIKASA
  203. bool "Mikasa"
  204. help
  205. AlphaServer 1000-based Alpha systems.
  206. config ALPHA_NAUTILUS
  207. bool "Nautilus"
  208. help
  209. Alpha systems based on the AMD 751 & ALI 1543C chipsets.
  210. config ALPHA_NONAME_CH
  211. bool "Noname"
  212. config ALPHA_NORITAKE
  213. bool "Noritake"
  214. select HAVE_EISA
  215. help
  216. AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
  217. systems.
  218. config ALPHA_PC164
  219. bool "PC164"
  220. config ALPHA_P2K
  221. bool "Platform2000"
  222. config ALPHA_RAWHIDE
  223. bool "Rawhide"
  224. select HAVE_EISA
  225. help
  226. AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
  227. See HOWTO at
  228. <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
  229. config ALPHA_RUFFIAN
  230. bool "Ruffian"
  231. help
  232. Samsung APC164UX. There is a page on known problems and workarounds
  233. at <http://www.alphalinux.org/faq/FAQ-11.html>.
  234. config ALPHA_RX164
  235. bool "RX164"
  236. config ALPHA_SX164
  237. bool "SX164"
  238. config ALPHA_SABLE
  239. bool "Sable"
  240. select HAVE_EISA
  241. help
  242. Digital AlphaServer 2000 and 2100-based systems.
  243. config ALPHA_SHARK
  244. bool "Shark"
  245. config ALPHA_TAKARA
  246. bool "Takara"
  247. help
  248. Alpha 11164-based OEM single-board computer.
  249. config ALPHA_TITAN
  250. bool "Titan"
  251. help
  252. AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
  253. config ALPHA_WILDFIRE
  254. bool "Wildfire"
  255. help
  256. AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
  257. endchoice
  258. # clear all implied options (don't want default values for those):
  259. # Most of these machines have ISA slots; not exactly sure which don't,
  260. # and this doesn't activate hordes of code, so do it always.
  261. config ISA
  262. bool
  263. default y
  264. help
  265. Find out whether you have ISA slots on your motherboard. ISA is the
  266. name of a bus system, i.e. the way the CPU talks to the other stuff
  267. inside your box. Other bus systems are PCI, EISA, MicroChannel
  268. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  269. newer boards don't support it. If you have ISA, say Y, otherwise N.
  270. config ISA_DMA_API
  271. bool
  272. default y
  273. config ALPHA_NONAME
  274. bool
  275. depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
  276. default y
  277. help
  278. The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
  279. UDB). This design was produced by Digital's Technical OEM (TOEM)
  280. group. It uses the 21066 processor running at 166MHz or 233MHz. It
  281. is a baby-AT size, and runs from a standard PC power supply. It has
  282. 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
  283. 2 versions, with either PS/2 or large DIN connectors for the
  284. keyboard.
  285. config ALPHA_EV4
  286. bool
  287. 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
  288. default y if !ALPHA_LYNX
  289. config ALPHA_LCA
  290. bool
  291. depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
  292. default y
  293. config ALPHA_APECS
  294. bool
  295. depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
  296. default y
  297. config ALPHA_EB64P
  298. bool
  299. depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
  300. default y
  301. help
  302. Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA,
  303. 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
  304. ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
  305. (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
  306. SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size.
  307. Runs from standard PC power supply.
  308. config ALPHA_EV5
  309. bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
  310. 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
  311. config ALPHA_EV4
  312. bool
  313. default y if ALPHA_LYNX && !ALPHA_EV5
  314. config ALPHA_CIA
  315. bool
  316. 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
  317. default y
  318. config ALPHA_EV56
  319. bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
  320. default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
  321. config ALPHA_EV56
  322. prompt "EV56 CPU (speed >= 333MHz)?"
  323. depends on ALPHA_NORITAKE || ALPHA_PRIMO
  324. config ALPHA_EV56
  325. prompt "EV56 CPU (speed >= 400MHz)?"
  326. depends on ALPHA_RAWHIDE
  327. config ALPHA_PRIMO
  328. bool "EV5 CPU daughtercard (model 5/xxx)?"
  329. depends on ALPHA_NORITAKE || ALPHA_MIKASA
  330. help
  331. Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
  332. config ALPHA_GAMMA
  333. bool "EV5 CPU(s) (model 5/xxx)?"
  334. depends on ALPHA_SABLE
  335. help
  336. Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
  337. config ALPHA_GAMMA
  338. bool
  339. depends on ALPHA_LYNX
  340. default y
  341. config ALPHA_T2
  342. bool
  343. depends on ALPHA_SABLE || ALPHA_LYNX
  344. default y
  345. config ALPHA_PYXIS
  346. bool
  347. depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
  348. default y
  349. config ALPHA_EV6
  350. bool
  351. depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
  352. default y
  353. config ALPHA_TSUNAMI
  354. bool
  355. depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
  356. default y
  357. config ALPHA_EV67
  358. bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
  359. default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
  360. help
  361. Is this a machine based on the EV67 core? If in doubt, select N here
  362. and the machine will be treated as an EV6.
  363. config ALPHA_MCPCIA
  364. bool
  365. depends on ALPHA_RAWHIDE
  366. default y
  367. config ALPHA_POLARIS
  368. bool
  369. depends on ALPHA_RX164
  370. default y
  371. config ALPHA_IRONGATE
  372. bool
  373. depends on ALPHA_NAUTILUS
  374. default y
  375. config GENERIC_HWEIGHT
  376. bool
  377. default y if !ALPHA_EV67
  378. config ALPHA_AVANTI
  379. bool
  380. depends on ALPHA_XL || ALPHA_AVANTI_CH
  381. default y
  382. help
  383. Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
  384. Alphas. Info at
  385. <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
  386. config ALPHA_BROKEN_IRQ_MASK
  387. bool
  388. depends on ALPHA_GENERIC || ALPHA_PC164
  389. default y
  390. config VGA_HOSE
  391. bool
  392. depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
  393. default y
  394. help
  395. Support VGA on an arbitrary hose; needed for several platforms
  396. which always have multiple hoses, and whose consoles support it.
  397. config ALPHA_QEMU
  398. bool "Run under QEMU emulation"
  399. depends on !ALPHA_GENERIC
  400. help
  401. Assume the presence of special features supported by QEMU PALcode
  402. that reduce the overhead of system emulation.
  403. Generic kernels will auto-detect QEMU. But when building a
  404. system-specific kernel, the assumption is that we want to
  405. eliminate as many runtime tests as possible.
  406. If unsure, say N.
  407. config ALPHA_SRM
  408. 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
  409. depends on TTY
  410. 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
  411. help
  412. There are two different types of booting firmware on Alphas: SRM,
  413. which is command line driven, and ARC, which uses menus and arrow
  414. keys. Details about the Linux/Alpha booting process are contained in
  415. the Linux/Alpha FAQ, accessible on the WWW from
  416. <http://www.alphalinux.org/>.
  417. The usual way to load Linux on an Alpha machine is to use MILO
  418. (a bootloader that lets you pass command line parameters to the
  419. kernel just like lilo does for the x86 architecture) which can be
  420. loaded either from ARC or can be installed directly as a permanent
  421. firmware replacement from floppy (which requires changing a certain
  422. jumper on the motherboard). If you want to do either of these, say N
  423. here. If MILO doesn't work on your system (true for Jensen
  424. motherboards), you can bypass it altogether and boot Linux directly
  425. from an SRM console; say Y here in order to do that. Note that you
  426. won't be able to boot from an IDE disk using SRM.
  427. If unsure, say N.
  428. config ARCH_MAY_HAVE_PC_FDC
  429. def_bool y
  430. config SMP
  431. bool "Symmetric multi-processing support"
  432. depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
  433. help
  434. This enables support for systems with more than one CPU. If you have
  435. a system with only one CPU, say N. If you have a system with more
  436. than one CPU, say Y.
  437. If you say N here, the kernel will run on uni- and multiprocessor
  438. machines, but will use only one CPU of a multiprocessor machine. If
  439. you say Y here, the kernel will run on many, but not all,
  440. uniprocessor machines. On a uniprocessor machine, the kernel
  441. will run faster if you say N here.
  442. See also the SMP-HOWTO available at
  443. <https://www.tldp.org/docs.html#howto>.
  444. If you don't know what to do here, say N.
  445. config NR_CPUS
  446. int "Maximum number of CPUs (2-32)"
  447. range 2 32
  448. depends on SMP
  449. default "32" if ALPHA_GENERIC || ALPHA_MARVEL
  450. default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
  451. help
  452. MARVEL support can handle a maximum of 32 CPUs, all the others
  453. with working support have a maximum of 4 CPUs.
  454. config ARCH_SPARSEMEM_ENABLE
  455. bool "Sparse Memory Support"
  456. help
  457. Say Y to support efficient handling of discontiguous physical memory,
  458. for systems that have huge holes in the physical address space.
  459. config ALPHA_WTINT
  460. bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
  461. default y if ALPHA_QEMU
  462. default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
  463. default n if !ALPHA_SRM && !ALPHA_GENERIC
  464. default y if SMP
  465. help
  466. The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
  467. to sleep until the next interrupt. This may reduce the power
  468. consumed, and the heat produced by the computer. However, it has
  469. the side effect of making the cycle counter unreliable as a timing
  470. device across the sleep.
  471. For emulation under QEMU, definitely say Y here, as we have other
  472. mechanisms for measuring time than the cycle counter.
  473. For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
  474. MILO, sleep mode is not supported so you might as well say N here.
  475. For SMP systems we cannot use the cycle counter for timing anyway,
  476. so you might as well say Y here.
  477. If unsure, say N.
  478. # LARGE_VMALLOC is racy, if you *really* need it then fix it first
  479. config ALPHA_LARGE_VMALLOC
  480. bool
  481. help
  482. Process creation and other aspects of virtual memory management can
  483. be streamlined if we restrict the kernel to one PGD for all vmalloc
  484. allocations. This equates to about 8GB.
  485. Under normal circumstances, this is so far and above what is needed
  486. as to be laughable. However, there are certain applications (such
  487. as benchmark-grade in-kernel web serving) that can make use of as
  488. much vmalloc space as is available.
  489. Say N unless you know you need gobs and gobs of vmalloc space.
  490. config VERBOSE_MCHECK
  491. bool "Verbose Machine Checks"
  492. config VERBOSE_MCHECK_ON
  493. int "Verbose Printing Mode (0=off, 1=on, 2=all)"
  494. depends on VERBOSE_MCHECK
  495. default 1
  496. help
  497. This option allows the default printing mode to be set, and then
  498. possibly overridden by a boot command argument.
  499. For example, if one wanted the option of printing verbose
  500. machine checks, but wanted the default to be as if verbose
  501. machine check printing was turned off, then one would choose
  502. the printing mode to be 0. Then, upon reboot, one could add
  503. the boot command line "verbose_mcheck=1" to get the normal
  504. verbose machine check printing, or "verbose_mcheck=2" to get
  505. the maximum information available.
  506. Take the default (1) unless you want more control or more info.
  507. choice
  508. prompt "Timer interrupt frequency (HZ)?"
  509. default HZ_128 if ALPHA_QEMU
  510. default HZ_1200 if ALPHA_RAWHIDE
  511. default HZ_1024
  512. help
  513. The frequency at which timer interrupts occur. A high frequency
  514. minimizes latency, whereas a low frequency minimizes overhead of
  515. process accounting. The later effect is especially significant
  516. when being run under QEMU.
  517. Note that some Alpha hardware cannot change the interrupt frequency
  518. of the timer. If unsure, say 1024 (or 1200 for Rawhide).
  519. config HZ_32
  520. bool "32 Hz"
  521. config HZ_64
  522. bool "64 Hz"
  523. config HZ_128
  524. bool "128 Hz"
  525. config HZ_256
  526. bool "256 Hz"
  527. config HZ_1024
  528. bool "1024 Hz"
  529. config HZ_1200
  530. bool "1200 Hz"
  531. endchoice
  532. config HZ
  533. int
  534. default 32 if HZ_32
  535. default 64 if HZ_64
  536. default 128 if HZ_128
  537. default 256 if HZ_256
  538. default 1200 if HZ_1200
  539. default 1024
  540. config SRM_ENV
  541. tristate "SRM environment through procfs"
  542. depends on PROC_FS
  543. help
  544. If you enable this option, a subdirectory inside /proc called
  545. /proc/srm_environment will give you access to the all important
  546. SRM environment variables (those which have a name) and also
  547. to all others (by their internal number).
  548. SRM is something like a BIOS for Alpha machines. There are some
  549. other such BIOSes, like AlphaBIOS, which this driver cannot
  550. support (hey, that's not SRM!).
  551. Despite the fact that this driver doesn't work on all Alphas (but
  552. only on those which have SRM as their firmware), it's save to
  553. build it even if your particular machine doesn't know about SRM
  554. (or if you intend to compile a generic kernel). It will simply
  555. not create those subdirectory in /proc (and give you some warning,
  556. of course).
  557. This driver is also available as a module and will be called
  558. srm_env then.
  559. endmenu
  560. # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
  561. # but we also need it if VGA_HOSE is set
  562. config DUMMY_CONSOLE
  563. bool
  564. depends on VGA_HOSE
  565. default y