Kconfig 21 KB

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  1. config ALPHA
  2. bool
  3. default y
  4. select ARCH_MIGHT_HAVE_PC_PARPORT
  5. select HAVE_AOUT
  6. select HAVE_IDE
  7. select HAVE_OPROFILE
  8. select HAVE_PCSPKR_PLATFORM
  9. select HAVE_PERF_EVENTS
  10. select HAVE_DMA_ATTRS
  11. select VIRT_TO_BUS
  12. select GENERIC_IRQ_PROBE
  13. select AUTO_IRQ_AFFINITY if SMP
  14. select GENERIC_IRQ_SHOW
  15. select ARCH_WANT_OPTIONAL_GPIOLIB
  16. select ARCH_WANT_IPC_PARSE_VERSION
  17. select ARCH_HAVE_NMI_SAFE_CMPXCHG
  18. select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  19. select GENERIC_SMP_IDLE_THREAD
  20. select GENERIC_STRNCPY_FROM_USER
  21. select GENERIC_STRNLEN_USER
  22. select HAVE_MOD_ARCH_SPECIFIC
  23. select MODULES_USE_ELF_RELA
  24. select ODD_RT_SIGACTION
  25. select OLD_SIGSUSPEND
  26. help
  27. The Alpha is a 64-bit general-purpose processor designed and
  28. marketed by the Digital Equipment Corporation of blessed memory,
  29. now Hewlett-Packard. The Alpha Linux project has a home page at
  30. <http://www.alphalinux.org/>.
  31. config 64BIT
  32. def_bool y
  33. config MMU
  34. bool
  35. default y
  36. config RWSEM_GENERIC_SPINLOCK
  37. bool
  38. config RWSEM_XCHGADD_ALGORITHM
  39. bool
  40. default y
  41. config ARCH_HAS_ILOG2_U32
  42. bool
  43. default n
  44. config ARCH_HAS_ILOG2_U64
  45. bool
  46. default n
  47. config GENERIC_CALIBRATE_DELAY
  48. bool
  49. default y
  50. config ZONE_DMA
  51. bool
  52. default y
  53. config ARCH_DMA_ADDR_T_64BIT
  54. def_bool y
  55. config NEED_DMA_MAP_STATE
  56. def_bool y
  57. config NEED_SG_DMA_LENGTH
  58. def_bool y
  59. config GENERIC_ISA_DMA
  60. bool
  61. default y
  62. source "init/Kconfig"
  63. source "kernel/Kconfig.freezer"
  64. menu "System setup"
  65. choice
  66. prompt "Alpha system type"
  67. default ALPHA_GENERIC
  68. ---help---
  69. This is the system type of your hardware. A "generic" kernel will
  70. run on any supported Alpha system. However, if you configure a
  71. kernel for your specific system, it will be faster and smaller.
  72. To find out what type of Alpha system you have, you may want to
  73. check out the Linux/Alpha FAQ, accessible on the WWW from
  74. <http://www.alphalinux.org/>. In summary:
  75. Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
  76. Alpha-XL XL-233, XL-266
  77. AlphaBook1 Alpha laptop
  78. Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
  79. Cabriolet AlphaPC64, AlphaPCI64
  80. DP264 DP264 / DS20 / ES40 / DS10 / DS10L
  81. EB164 EB164 21164 evaluation board
  82. EB64+ EB64+ 21064 evaluation board
  83. EB66 EB66 21066 evaluation board
  84. EB66+ EB66+ 21066 evaluation board
  85. Jensen DECpc 150, DEC 2000 models 300, 500
  86. LX164 AlphaPC164-LX
  87. Lynx AS 2100A
  88. Miata Personal Workstation 433/500/600 a/au
  89. Marvel AlphaServer ES47 / ES80 / GS1280
  90. Mikasa AS 1000
  91. Noname AXPpci33, UDB (Multia)
  92. Noritake AS 1000A, AS 600A, AS 800
  93. PC164 AlphaPC164
  94. Rawhide AS 1200, AS 4000, AS 4100
  95. Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
  96. SX164 AlphaPC164-SX
  97. Sable AS 2000, AS 2100
  98. Shark DS 20L
  99. Takara Takara (OEM)
  100. Titan AlphaServer ES45 / DS25 / DS15
  101. Wildfire AlphaServer GS 40/80/160/320
  102. If you don't know what to do, choose "generic".
  103. config ALPHA_GENERIC
  104. bool "Generic"
  105. depends on TTY
  106. help
  107. A generic kernel will run on all supported Alpha hardware.
  108. config ALPHA_ALCOR
  109. bool "Alcor/Alpha-XLT"
  110. help
  111. For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
  112. slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
  113. Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
  114. controller (256-bit memory bus) and a PCI interface. It also does
  115. all the work required to support an external Bcache and to maintain
  116. memory coherence when a PCI device DMAs into (or out of) memory.
  117. config ALPHA_XL
  118. bool "Alpha-XL"
  119. help
  120. XL-233 and XL-266-based Alpha systems.
  121. config ALPHA_BOOK1
  122. bool "AlphaBook1"
  123. help
  124. Dec AlphaBook1/Burns Alpha-based laptops.
  125. config ALPHA_AVANTI_CH
  126. bool "Avanti"
  127. config ALPHA_CABRIOLET
  128. bool "Cabriolet"
  129. help
  130. Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now
  131. baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
  132. slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
  133. Bcache SIMMs. Requires power supply with 3.3V output.
  134. config ALPHA_DP264
  135. bool "DP264"
  136. help
  137. Various 21264 systems with the tsunami core logic chipset.
  138. API Networks: 264DP, UP2000(+), CS20;
  139. Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
  140. config ALPHA_EB164
  141. bool "EB164"
  142. help
  143. EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has
  144. ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
  145. shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in
  146. Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
  147. MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized
  148. motherboard. Requires power supply with 3.3V output.
  149. config ALPHA_EB64P_CH
  150. bool "EB64+"
  151. config ALPHA_EB66
  152. bool "EB66"
  153. help
  154. A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is
  155. identical to EB64+. Baby PC-AT size. Runs from standard PC power
  156. supply. The EB66 schematic was published as a marketing poster
  157. advertising the 21066 as "the first microprocessor in the world with
  158. embedded PCI".
  159. config ALPHA_EB66P
  160. bool "EB66+"
  161. help
  162. Later variant of the EB66 board.
  163. config ALPHA_EIGER
  164. bool "Eiger"
  165. help
  166. Apparently an obscure OEM single-board computer based on the
  167. Typhoon/Tsunami chipset family. Information on it is scanty.
  168. config ALPHA_JENSEN
  169. bool "Jensen"
  170. help
  171. DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
  172. of the first-generation Alpha systems. A number of these systems
  173. seem to be available on the second- hand market. The Jensen is a
  174. floor-standing tower system which originally used a 150MHz 21064 It
  175. used programmable logic to interface a 486 EISA I/O bridge to the
  176. CPU.
  177. config ALPHA_LX164
  178. bool "LX164"
  179. help
  180. A technical overview of this board is available at
  181. <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
  182. config ALPHA_LYNX
  183. bool "Lynx"
  184. help
  185. AlphaServer 2100A-based systems.
  186. config ALPHA_MARVEL
  187. bool "Marvel"
  188. help
  189. AlphaServer ES47 / ES80 / GS1280 based on EV7.
  190. config ALPHA_MIATA
  191. bool "Miata"
  192. help
  193. The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
  194. or 600au).
  195. config ALPHA_MIKASA
  196. bool "Mikasa"
  197. help
  198. AlphaServer 1000-based Alpha systems.
  199. config ALPHA_NAUTILUS
  200. bool "Nautilus"
  201. help
  202. Alpha systems based on the AMD 751 & ALI 1543C chipsets.
  203. config ALPHA_NONAME_CH
  204. bool "Noname"
  205. config ALPHA_NORITAKE
  206. bool "Noritake"
  207. help
  208. AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
  209. systems.
  210. config ALPHA_PC164
  211. bool "PC164"
  212. config ALPHA_P2K
  213. bool "Platform2000"
  214. config ALPHA_RAWHIDE
  215. bool "Rawhide"
  216. help
  217. AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
  218. See HOWTO at
  219. <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
  220. config ALPHA_RUFFIAN
  221. bool "Ruffian"
  222. help
  223. Samsung APC164UX. There is a page on known problems and workarounds
  224. at <http://www.alphalinux.org/faq/FAQ-11.html>.
  225. config ALPHA_RX164
  226. bool "RX164"
  227. config ALPHA_SX164
  228. bool "SX164"
  229. config ALPHA_SABLE
  230. bool "Sable"
  231. help
  232. Digital AlphaServer 2000 and 2100-based systems.
  233. config ALPHA_SHARK
  234. bool "Shark"
  235. config ALPHA_TAKARA
  236. bool "Takara"
  237. help
  238. Alpha 11164-based OEM single-board computer.
  239. config ALPHA_TITAN
  240. bool "Titan"
  241. help
  242. AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
  243. config ALPHA_WILDFIRE
  244. bool "Wildfire"
  245. help
  246. AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
  247. endchoice
  248. # clear all implied options (don't want default values for those):
  249. # Most of these machines have ISA slots; not exactly sure which don't,
  250. # and this doesn't activate hordes of code, so do it always.
  251. config ISA
  252. bool
  253. default y
  254. help
  255. Find out whether you have ISA slots on your motherboard. ISA is the
  256. name of a bus system, i.e. the way the CPU talks to the other stuff
  257. inside your box. Other bus systems are PCI, EISA, MicroChannel
  258. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  259. newer boards don't support it. If you have ISA, say Y, otherwise N.
  260. config ISA_DMA_API
  261. bool
  262. default y
  263. config PCI
  264. bool
  265. depends on !ALPHA_JENSEN
  266. select GENERIC_PCI_IOMAP
  267. default y
  268. help
  269. Find out whether you have a PCI motherboard. PCI is the name of a
  270. bus system, i.e. the way the CPU talks to the other stuff inside
  271. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  272. VESA. If you have PCI, say Y, otherwise N.
  273. config PCI_DOMAINS
  274. bool
  275. default y
  276. config PCI_SYSCALL
  277. def_bool PCI
  278. config IOMMU_HELPER
  279. def_bool PCI
  280. config ALPHA_NONAME
  281. bool
  282. depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
  283. default y
  284. help
  285. The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
  286. UDB). This design was produced by Digital's Technical OEM (TOEM)
  287. group. It uses the 21066 processor running at 166MHz or 233MHz. It
  288. is a baby-AT size, and runs from a standard PC power supply. It has
  289. 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
  290. 2 versions, with either PS/2 or large DIN connectors for the
  291. keyboard.
  292. config ALPHA_EV4
  293. bool
  294. 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
  295. default y if !ALPHA_LYNX
  296. config ALPHA_LCA
  297. bool
  298. depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
  299. default y
  300. config ALPHA_APECS
  301. bool
  302. depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
  303. default y
  304. config ALPHA_EB64P
  305. bool
  306. depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
  307. default y
  308. help
  309. Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA,
  310. 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
  311. ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
  312. (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
  313. SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size.
  314. Runs from standard PC power supply.
  315. config ALPHA_EV5
  316. bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
  317. 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
  318. config ALPHA_EV4
  319. bool
  320. default y if ALPHA_LYNX && !ALPHA_EV5
  321. config ALPHA_CIA
  322. bool
  323. 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
  324. default y
  325. config ALPHA_EV56
  326. bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
  327. default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
  328. config ALPHA_EV56
  329. prompt "EV56 CPU (speed >= 333MHz)?"
  330. depends on ALPHA_NORITAKE || ALPHA_PRIMO
  331. config ALPHA_EV56
  332. prompt "EV56 CPU (speed >= 400MHz)?"
  333. depends on ALPHA_RAWHIDE
  334. config ALPHA_PRIMO
  335. bool "EV5 CPU daughtercard (model 5/xxx)?"
  336. depends on ALPHA_NORITAKE || ALPHA_MIKASA
  337. help
  338. Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
  339. config ALPHA_GAMMA
  340. bool "EV5 CPU(s) (model 5/xxx)?"
  341. depends on ALPHA_SABLE
  342. help
  343. Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
  344. config ALPHA_GAMMA
  345. bool
  346. depends on ALPHA_LYNX
  347. default y
  348. config ALPHA_T2
  349. bool
  350. depends on ALPHA_SABLE || ALPHA_LYNX
  351. default y
  352. config ALPHA_PYXIS
  353. bool
  354. depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
  355. default y
  356. config ALPHA_EV6
  357. bool
  358. depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
  359. default y
  360. config ALPHA_TSUNAMI
  361. bool
  362. depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
  363. default y
  364. config ALPHA_EV67
  365. bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
  366. default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
  367. help
  368. Is this a machine based on the EV67 core? If in doubt, select N here
  369. and the machine will be treated as an EV6.
  370. config ALPHA_MCPCIA
  371. bool
  372. depends on ALPHA_RAWHIDE
  373. default y
  374. config ALPHA_POLARIS
  375. bool
  376. depends on ALPHA_RX164
  377. default y
  378. config ALPHA_IRONGATE
  379. bool
  380. depends on ALPHA_NAUTILUS
  381. default y
  382. config GENERIC_HWEIGHT
  383. bool
  384. default y if !ALPHA_EV67
  385. config ALPHA_AVANTI
  386. bool
  387. depends on ALPHA_XL || ALPHA_AVANTI_CH
  388. default y
  389. help
  390. Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
  391. Alphas. Info at
  392. <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
  393. config ALPHA_BROKEN_IRQ_MASK
  394. bool
  395. depends on ALPHA_GENERIC || ALPHA_PC164
  396. default y
  397. config VGA_HOSE
  398. bool
  399. depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
  400. default y
  401. help
  402. Support VGA on an arbitrary hose; needed for several platforms
  403. which always have multiple hoses, and whose consoles support it.
  404. config ALPHA_QEMU
  405. bool "Run under QEMU emulation"
  406. depends on !ALPHA_GENERIC
  407. ---help---
  408. Assume the presence of special features supported by QEMU PALcode
  409. that reduce the overhead of system emulation.
  410. Generic kernels will auto-detect QEMU. But when building a
  411. system-specific kernel, the assumption is that we want to
  412. elimiate as many runtime tests as possible.
  413. If unsure, say N.
  414. config ALPHA_SRM
  415. 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
  416. depends on TTY
  417. 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
  418. ---help---
  419. There are two different types of booting firmware on Alphas: SRM,
  420. which is command line driven, and ARC, which uses menus and arrow
  421. keys. Details about the Linux/Alpha booting process are contained in
  422. the Linux/Alpha FAQ, accessible on the WWW from
  423. <http://www.alphalinux.org/>.
  424. The usual way to load Linux on an Alpha machine is to use MILO
  425. (a bootloader that lets you pass command line parameters to the
  426. kernel just like lilo does for the x86 architecture) which can be
  427. loaded either from ARC or can be installed directly as a permanent
  428. firmware replacement from floppy (which requires changing a certain
  429. jumper on the motherboard). If you want to do either of these, say N
  430. here. If MILO doesn't work on your system (true for Jensen
  431. motherboards), you can bypass it altogether and boot Linux directly
  432. from an SRM console; say Y here in order to do that. Note that you
  433. won't be able to boot from an IDE disk using SRM.
  434. If unsure, say N.
  435. config EISA
  436. bool
  437. depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
  438. default y
  439. config ARCH_MAY_HAVE_PC_FDC
  440. def_bool y
  441. config SMP
  442. bool "Symmetric multi-processing support"
  443. depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
  444. ---help---
  445. This enables support for systems with more than one CPU. If you have
  446. a system with only one CPU, like most personal computers, say N. If
  447. you have a system with more than one CPU, say Y.
  448. If you say N here, the kernel will run on single and multiprocessor
  449. machines, but will use only one CPU of a multiprocessor machine. If
  450. you say Y here, the kernel will run on many, but not all,
  451. singleprocessor machines. On a singleprocessor machine, the kernel
  452. will run faster if you say N here.
  453. See also the SMP-HOWTO available at
  454. <http://www.tldp.org/docs.html#howto>.
  455. If you don't know what to do here, say N.
  456. config HAVE_DEC_LOCK
  457. bool
  458. depends on SMP
  459. default y
  460. config NR_CPUS
  461. int "Maximum number of CPUs (2-32)"
  462. range 2 32
  463. depends on SMP
  464. default "32" if ALPHA_GENERIC || ALPHA_MARVEL
  465. default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
  466. help
  467. MARVEL support can handle a maximum of 32 CPUs, all the others
  468. with working support have a maximum of 4 CPUs.
  469. config ARCH_DISCONTIGMEM_ENABLE
  470. bool "Discontiguous Memory Support"
  471. help
  472. Say Y to support efficient handling of discontiguous physical memory,
  473. for architectures which are either NUMA (Non-Uniform Memory Access)
  474. or have huge holes in the physical address space for other reasons.
  475. See <file:Documentation/vm/numa> for more.
  476. source "mm/Kconfig"
  477. config NUMA
  478. bool "NUMA Support (EXPERIMENTAL)"
  479. depends on DISCONTIGMEM && BROKEN
  480. help
  481. Say Y to compile the kernel to support NUMA (Non-Uniform Memory
  482. Access). This option is for configuring high-end multiprocessor
  483. server machines. If in doubt, say N.
  484. config ALPHA_WTINT
  485. bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
  486. default y if ALPHA_QEMU
  487. default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
  488. default n if !ALPHA_SRM && !ALPHA_GENERIC
  489. default y if SMP
  490. ---help---
  491. The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
  492. to sleep until the next interrupt. This may reduce the power
  493. consumed, and the heat produced by the computer. However, it has
  494. the side effect of making the cycle counter unreliable as a timing
  495. device across the sleep.
  496. For emulation under QEMU, definitely say Y here, as we have other
  497. mechanisms for measuring time than the cycle counter.
  498. For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
  499. MILO, sleep mode is not supported so you might as well say N here.
  500. For SMP systems we cannot use the cycle counter for timing anyway,
  501. so you might as well say Y here.
  502. If unsure, say N.
  503. config NODES_SHIFT
  504. int
  505. default "7"
  506. depends on NEED_MULTIPLE_NODES
  507. # LARGE_VMALLOC is racy, if you *really* need it then fix it first
  508. config ALPHA_LARGE_VMALLOC
  509. bool
  510. ---help---
  511. Process creation and other aspects of virtual memory management can
  512. be streamlined if we restrict the kernel to one PGD for all vmalloc
  513. allocations. This equates to about 8GB.
  514. Under normal circumstances, this is so far and above what is needed
  515. as to be laughable. However, there are certain applications (such
  516. as benchmark-grade in-kernel web serving) that can make use of as
  517. much vmalloc space as is available.
  518. Say N unless you know you need gobs and gobs of vmalloc space.
  519. config VERBOSE_MCHECK
  520. bool "Verbose Machine Checks"
  521. config VERBOSE_MCHECK_ON
  522. int "Verbose Printing Mode (0=off, 1=on, 2=all)"
  523. depends on VERBOSE_MCHECK
  524. default 1
  525. ---help---
  526. This option allows the default printing mode to be set, and then
  527. possibly overridden by a boot command argument.
  528. For example, if one wanted the option of printing verbose
  529. machine checks, but wanted the default to be as if verbose
  530. machine check printing was turned off, then one would choose
  531. the printing mode to be 0. Then, upon reboot, one could add
  532. the boot command line "verbose_mcheck=1" to get the normal
  533. verbose machine check printing, or "verbose_mcheck=2" to get
  534. the maximum information available.
  535. Take the default (1) unless you want more control or more info.
  536. choice
  537. prompt "Timer interrupt frequency (HZ)?"
  538. default HZ_128 if ALPHA_QEMU
  539. default HZ_1200 if ALPHA_RAWHIDE
  540. default HZ_1024
  541. ---help---
  542. The frequency at which timer interrupts occur. A high frequency
  543. minimizes latency, whereas a low frequency minimizes overhead of
  544. process accounting. The later effect is especially significant
  545. when being run under QEMU.
  546. Note that some Alpha hardware cannot change the interrupt frequency
  547. of the timer. If unsure, say 1024 (or 1200 for Rawhide).
  548. config HZ_32
  549. bool "32 Hz"
  550. config HZ_64
  551. bool "64 Hz"
  552. config HZ_128
  553. bool "128 Hz"
  554. config HZ_256
  555. bool "256 Hz"
  556. config HZ_1024
  557. bool "1024 Hz"
  558. config HZ_1200
  559. bool "1200 Hz"
  560. endchoice
  561. config HZ
  562. int
  563. default 32 if HZ_32
  564. default 64 if HZ_64
  565. default 128 if HZ_128
  566. default 256 if HZ_256
  567. default 1200 if HZ_1200
  568. default 1024
  569. source "drivers/pci/Kconfig"
  570. source "drivers/eisa/Kconfig"
  571. source "drivers/pcmcia/Kconfig"
  572. config SRM_ENV
  573. tristate "SRM environment through procfs"
  574. depends on PROC_FS
  575. ---help---
  576. If you enable this option, a subdirectory inside /proc called
  577. /proc/srm_environment will give you access to the all important
  578. SRM environment variables (those which have a name) and also
  579. to all others (by their internal number).
  580. SRM is something like a BIOS for Alpha machines. There are some
  581. other such BIOSes, like AlphaBIOS, which this driver cannot
  582. support (hey, that's not SRM!).
  583. Despite the fact that this driver doesn't work on all Alphas (but
  584. only on those which have SRM as their firmware), it's save to
  585. build it even if your particular machine doesn't know about SRM
  586. (or if you intend to compile a generic kernel). It will simply
  587. not create those subdirectory in /proc (and give you some warning,
  588. of course).
  589. This driver is also available as a module and will be called
  590. srm_env then.
  591. source "fs/Kconfig.binfmt"
  592. endmenu
  593. source "net/Kconfig"
  594. source "drivers/Kconfig"
  595. source "fs/Kconfig"
  596. source "arch/alpha/Kconfig.debug"
  597. # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
  598. # but we also need it if VGA_HOSE is set
  599. config DUMMY_CONSOLE
  600. bool
  601. depends on VGA_HOSE
  602. default y
  603. source "security/Kconfig"
  604. source "crypto/Kconfig"
  605. source "lib/Kconfig"