Kconfig 51 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473147414751476147714781479148014811482148314841485148614871488148914901491149214931494149514961497149814991500150115021503150415051506150715081509151015111512151315141515151615171518151915201521152215231524152515261527152815291530153115321533153415351536153715381539154015411542154315441545154615471548154915501551155215531554155515561557155815591560156115621563156415651566156715681569157015711572157315741575157615771578157915801581158215831584158515861587158815891590159115921593159415951596159715981599160016011602160316041605160616071608160916101611161216131614161516161617161816191620162116221623162416251626162716281629163016311632163316341635163616371638163916401641164216431644164516461647164816491650165116521653165416551656165716581659166016611662166316641665166616671668166916701671167216731674167516761677167816791680168116821683168416851686168716881689169016911692169316941695169616971698169917001701170217031704170517061707170817091710171117121713171417151716171717181719172017211722172317241725172617271728172917301731173217331734173517361737173817391740174117421743174417451746174717481749175017511752175317541755175617571758175917601761176217631764176517661767176817691770177117721773177417751776177717781779178017811782178317841785178617871788178917901791179217931794179517961797179817991800180118021803180418051806180718081809181018111812181318141815181618171818181918201821182218231824182518261827182818291830183118321833183418351836183718381839184018411842184318441845184618471848184918501851185218531854185518561857185818591860186118621863186418651866186718681869187018711872187318741875187618771878
  1. config ARM
  2. bool
  3. default y
  4. select HAVE_AOUT
  5. select HAVE_IDE
  6. select HAVE_MEMBLOCK
  7. select RTC_LIB
  8. select SYS_SUPPORTS_APM_EMULATION
  9. select GENERIC_ATOMIC64 if (!CPU_32v6K || !AEABI)
  10. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  11. select HAVE_ARCH_KGDB
  12. select HAVE_KPROBES if (!XIP_KERNEL)
  13. select HAVE_KRETPROBES if (HAVE_KPROBES)
  14. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  15. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  16. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  17. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  18. select HAVE_GENERIC_DMA_COHERENT
  19. select HAVE_KERNEL_GZIP
  20. select HAVE_KERNEL_LZO
  21. select HAVE_KERNEL_LZMA
  22. select HAVE_IRQ_WORK
  23. select HAVE_PERF_EVENTS
  24. select PERF_USE_VMALLOC
  25. select HAVE_REGS_AND_STACK_ACCESS_API
  26. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V7))
  27. help
  28. The ARM series is a line of low-power-consumption RISC chip designs
  29. licensed by ARM Ltd and targeted at embedded applications and
  30. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  31. manufactured, but legacy ARM-based PC hardware remains popular in
  32. Europe. There is an ARM Linux project with a web page at
  33. <http://www.arm.linux.org.uk/>.
  34. config HAVE_PWM
  35. bool
  36. config SYS_SUPPORTS_APM_EMULATION
  37. bool
  38. config HAVE_SCHED_CLOCK
  39. bool
  40. config GENERIC_GPIO
  41. bool
  42. config ARCH_USES_GETTIMEOFFSET
  43. bool
  44. default n
  45. config GENERIC_CLOCKEVENTS
  46. bool
  47. config GENERIC_CLOCKEVENTS_BROADCAST
  48. bool
  49. depends on GENERIC_CLOCKEVENTS
  50. default y if SMP
  51. config HAVE_TCM
  52. bool
  53. select GENERIC_ALLOCATOR
  54. config HAVE_PROC_CPU
  55. bool
  56. config NO_IOPORT
  57. bool
  58. config EISA
  59. bool
  60. ---help---
  61. The Extended Industry Standard Architecture (EISA) bus was
  62. developed as an open alternative to the IBM MicroChannel bus.
  63. The EISA bus provided some of the features of the IBM MicroChannel
  64. bus while maintaining backward compatibility with cards made for
  65. the older ISA bus. The EISA bus saw limited use between 1988 and
  66. 1995 when it was made obsolete by the PCI bus.
  67. Say Y here if you are building a kernel for an EISA-based machine.
  68. Otherwise, say N.
  69. config SBUS
  70. bool
  71. config MCA
  72. bool
  73. help
  74. MicroChannel Architecture is found in some IBM PS/2 machines and
  75. laptops. It is a bus system similar to PCI or ISA. See
  76. <file:Documentation/mca.txt> (and especially the web page given
  77. there) before attempting to build an MCA bus kernel.
  78. config GENERIC_HARDIRQS
  79. bool
  80. default y
  81. config STACKTRACE_SUPPORT
  82. bool
  83. default y
  84. config HAVE_LATENCYTOP_SUPPORT
  85. bool
  86. depends on !SMP
  87. default y
  88. config LOCKDEP_SUPPORT
  89. bool
  90. default y
  91. config TRACE_IRQFLAGS_SUPPORT
  92. bool
  93. default y
  94. config HARDIRQS_SW_RESEND
  95. bool
  96. default y
  97. config GENERIC_IRQ_PROBE
  98. bool
  99. default y
  100. config GENERIC_LOCKBREAK
  101. bool
  102. default y
  103. depends on SMP && PREEMPT
  104. config RWSEM_GENERIC_SPINLOCK
  105. bool
  106. default y
  107. config RWSEM_XCHGADD_ALGORITHM
  108. bool
  109. config ARCH_HAS_ILOG2_U32
  110. bool
  111. config ARCH_HAS_ILOG2_U64
  112. bool
  113. config ARCH_HAS_CPUFREQ
  114. bool
  115. help
  116. Internal node to signify that the ARCH has CPUFREQ support
  117. and that the relevant menu configurations are displayed for
  118. it.
  119. config ARCH_HAS_CPU_IDLE_WAIT
  120. def_bool y
  121. config GENERIC_HWEIGHT
  122. bool
  123. default y
  124. config GENERIC_CALIBRATE_DELAY
  125. bool
  126. default y
  127. config ARCH_MAY_HAVE_PC_FDC
  128. bool
  129. config ZONE_DMA
  130. bool
  131. config NEED_DMA_MAP_STATE
  132. def_bool y
  133. config GENERIC_ISA_DMA
  134. bool
  135. config FIQ
  136. bool
  137. config ARCH_MTD_XIP
  138. bool
  139. config GENERIC_HARDIRQS_NO__DO_IRQ
  140. def_bool y
  141. config ARM_L1_CACHE_SHIFT_6
  142. bool
  143. help
  144. Setting ARM L1 cache line size to 64 Bytes.
  145. config VECTORS_BASE
  146. hex
  147. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  148. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  149. default 0x00000000
  150. help
  151. The base address of exception vectors.
  152. source "init/Kconfig"
  153. source "kernel/Kconfig.freezer"
  154. menu "System Type"
  155. config MMU
  156. bool "MMU-based Paged Memory Management Support"
  157. default y
  158. help
  159. Select if you want MMU-based virtualised addressing space
  160. support by paged memory management. If unsure, say 'Y'.
  161. #
  162. # The "ARM system type" choice list is ordered alphabetically by option
  163. # text. Please add new entries in the option alphabetic order.
  164. #
  165. choice
  166. prompt "ARM system type"
  167. default ARCH_VERSATILE
  168. config ARCH_AAEC2000
  169. bool "Agilent AAEC-2000 based"
  170. select CPU_ARM920T
  171. select ARM_AMBA
  172. select HAVE_CLK
  173. select ARCH_USES_GETTIMEOFFSET
  174. help
  175. This enables support for systems based on the Agilent AAEC-2000
  176. config ARCH_INTEGRATOR
  177. bool "ARM Ltd. Integrator family"
  178. select ARM_AMBA
  179. select ARCH_HAS_CPUFREQ
  180. select COMMON_CLKDEV
  181. select ICST
  182. select GENERIC_CLOCKEVENTS
  183. select PLAT_VERSATILE
  184. help
  185. Support for ARM's Integrator platform.
  186. config ARCH_REALVIEW
  187. bool "ARM Ltd. RealView family"
  188. select ARM_AMBA
  189. select COMMON_CLKDEV
  190. select HAVE_SCHED_CLOCK
  191. select ICST
  192. select GENERIC_CLOCKEVENTS
  193. select ARCH_WANT_OPTIONAL_GPIOLIB
  194. select PLAT_VERSATILE
  195. select ARM_TIMER_SP804
  196. select GPIO_PL061 if GPIOLIB
  197. help
  198. This enables support for ARM Ltd RealView boards.
  199. config ARCH_VERSATILE
  200. bool "ARM Ltd. Versatile family"
  201. select ARM_AMBA
  202. select ARM_VIC
  203. select COMMON_CLKDEV
  204. select HAVE_SCHED_CLOCK
  205. select ICST
  206. select GENERIC_CLOCKEVENTS
  207. select ARCH_WANT_OPTIONAL_GPIOLIB
  208. select PLAT_VERSATILE
  209. select ARM_TIMER_SP804
  210. help
  211. This enables support for ARM Ltd Versatile board.
  212. config ARCH_VEXPRESS
  213. bool "ARM Ltd. Versatile Express family"
  214. select ARCH_WANT_OPTIONAL_GPIOLIB
  215. select ARM_AMBA
  216. select ARM_TIMER_SP804
  217. select COMMON_CLKDEV
  218. select GENERIC_CLOCKEVENTS
  219. select HAVE_CLK
  220. select ICST
  221. select PLAT_VERSATILE
  222. help
  223. This enables support for the ARM Ltd Versatile Express boards.
  224. config ARCH_AT91
  225. bool "Atmel AT91"
  226. select ARCH_REQUIRE_GPIOLIB
  227. select HAVE_CLK
  228. help
  229. This enables support for systems based on the Atmel AT91RM9200,
  230. AT91SAM9 and AT91CAP9 processors.
  231. config ARCH_BCMRING
  232. bool "Broadcom BCMRING"
  233. depends on MMU
  234. select CPU_V6
  235. select ARM_AMBA
  236. select COMMON_CLKDEV
  237. select GENERIC_CLOCKEVENTS
  238. select ARCH_WANT_OPTIONAL_GPIOLIB
  239. help
  240. Support for Broadcom's BCMRing platform.
  241. config ARCH_CLPS711X
  242. bool "Cirrus Logic CLPS711x/EP721x-based"
  243. select CPU_ARM720T
  244. select ARCH_USES_GETTIMEOFFSET
  245. help
  246. Support for Cirrus Logic 711x/721x based boards.
  247. config ARCH_CNS3XXX
  248. bool "Cavium Networks CNS3XXX family"
  249. select CPU_V6
  250. select GENERIC_CLOCKEVENTS
  251. select ARM_GIC
  252. select PCI_DOMAINS if PCI
  253. help
  254. Support for Cavium Networks CNS3XXX platform.
  255. config ARCH_GEMINI
  256. bool "Cortina Systems Gemini"
  257. select CPU_FA526
  258. select ARCH_REQUIRE_GPIOLIB
  259. select ARCH_USES_GETTIMEOFFSET
  260. help
  261. Support for the Cortina Systems Gemini family SoCs
  262. config ARCH_EBSA110
  263. bool "EBSA-110"
  264. select CPU_SA110
  265. select ISA
  266. select NO_IOPORT
  267. select ARCH_USES_GETTIMEOFFSET
  268. help
  269. This is an evaluation board for the StrongARM processor available
  270. from Digital. It has limited hardware on-board, including an
  271. Ethernet interface, two PCMCIA sockets, two serial ports and a
  272. parallel port.
  273. config ARCH_EP93XX
  274. bool "EP93xx-based"
  275. select CPU_ARM920T
  276. select ARM_AMBA
  277. select ARM_VIC
  278. select COMMON_CLKDEV
  279. select ARCH_REQUIRE_GPIOLIB
  280. select ARCH_HAS_HOLES_MEMORYMODEL
  281. select ARCH_USES_GETTIMEOFFSET
  282. help
  283. This enables support for the Cirrus EP93xx series of CPUs.
  284. config ARCH_FOOTBRIDGE
  285. bool "FootBridge"
  286. select CPU_SA110
  287. select FOOTBRIDGE
  288. select ARCH_USES_GETTIMEOFFSET
  289. help
  290. Support for systems based on the DC21285 companion chip
  291. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  292. config ARCH_MXC
  293. bool "Freescale MXC/iMX-based"
  294. select GENERIC_CLOCKEVENTS
  295. select ARCH_REQUIRE_GPIOLIB
  296. select COMMON_CLKDEV
  297. help
  298. Support for Freescale MXC/iMX-based family of processors
  299. config ARCH_STMP3XXX
  300. bool "Freescale STMP3xxx"
  301. select CPU_ARM926T
  302. select COMMON_CLKDEV
  303. select ARCH_REQUIRE_GPIOLIB
  304. select GENERIC_CLOCKEVENTS
  305. select USB_ARCH_HAS_EHCI
  306. help
  307. Support for systems based on the Freescale 3xxx CPUs.
  308. config ARCH_NETX
  309. bool "Hilscher NetX based"
  310. select CPU_ARM926T
  311. select ARM_VIC
  312. select GENERIC_CLOCKEVENTS
  313. help
  314. This enables support for systems based on the Hilscher NetX Soc
  315. config ARCH_H720X
  316. bool "Hynix HMS720x-based"
  317. select CPU_ARM720T
  318. select ISA_DMA_API
  319. select ARCH_USES_GETTIMEOFFSET
  320. help
  321. This enables support for systems based on the Hynix HMS720x
  322. config ARCH_IOP13XX
  323. bool "IOP13xx-based"
  324. depends on MMU
  325. select CPU_XSC3
  326. select PLAT_IOP
  327. select PCI
  328. select ARCH_SUPPORTS_MSI
  329. select VMSPLIT_1G
  330. help
  331. Support for Intel's IOP13XX (XScale) family of processors.
  332. config ARCH_IOP32X
  333. bool "IOP32x-based"
  334. depends on MMU
  335. select CPU_XSCALE
  336. select PLAT_IOP
  337. select PCI
  338. select ARCH_REQUIRE_GPIOLIB
  339. help
  340. Support for Intel's 80219 and IOP32X (XScale) family of
  341. processors.
  342. config ARCH_IOP33X
  343. bool "IOP33x-based"
  344. depends on MMU
  345. select CPU_XSCALE
  346. select PLAT_IOP
  347. select PCI
  348. select ARCH_REQUIRE_GPIOLIB
  349. help
  350. Support for Intel's IOP33X (XScale) family of processors.
  351. config ARCH_IXP23XX
  352. bool "IXP23XX-based"
  353. depends on MMU
  354. select CPU_XSC3
  355. select PCI
  356. select ARCH_USES_GETTIMEOFFSET
  357. help
  358. Support for Intel's IXP23xx (XScale) family of processors.
  359. config ARCH_IXP2000
  360. bool "IXP2400/2800-based"
  361. depends on MMU
  362. select CPU_XSCALE
  363. select PCI
  364. select ARCH_USES_GETTIMEOFFSET
  365. help
  366. Support for Intel's IXP2400/2800 (XScale) family of processors.
  367. config ARCH_IXP4XX
  368. bool "IXP4xx-based"
  369. depends on MMU
  370. select CPU_XSCALE
  371. select GENERIC_GPIO
  372. select GENERIC_CLOCKEVENTS
  373. select HAVE_SCHED_CLOCK
  374. select DMABOUNCE if PCI
  375. help
  376. Support for Intel's IXP4XX (XScale) family of processors.
  377. config ARCH_DOVE
  378. bool "Marvell Dove"
  379. select PCI
  380. select ARCH_REQUIRE_GPIOLIB
  381. select GENERIC_CLOCKEVENTS
  382. select PLAT_ORION
  383. help
  384. Support for the Marvell Dove SoC 88AP510
  385. config ARCH_KIRKWOOD
  386. bool "Marvell Kirkwood"
  387. select CPU_FEROCEON
  388. select PCI
  389. select ARCH_REQUIRE_GPIOLIB
  390. select GENERIC_CLOCKEVENTS
  391. select PLAT_ORION
  392. help
  393. Support for the following Marvell Kirkwood series SoCs:
  394. 88F6180, 88F6192 and 88F6281.
  395. config ARCH_LOKI
  396. bool "Marvell Loki (88RC8480)"
  397. select CPU_FEROCEON
  398. select GENERIC_CLOCKEVENTS
  399. select PLAT_ORION
  400. help
  401. Support for the Marvell Loki (88RC8480) SoC.
  402. config ARCH_LPC32XX
  403. bool "NXP LPC32XX"
  404. select CPU_ARM926T
  405. select ARCH_REQUIRE_GPIOLIB
  406. select HAVE_IDE
  407. select ARM_AMBA
  408. select USB_ARCH_HAS_OHCI
  409. select COMMON_CLKDEV
  410. select GENERIC_TIME
  411. select GENERIC_CLOCKEVENTS
  412. help
  413. Support for the NXP LPC32XX family of processors
  414. config ARCH_MV78XX0
  415. bool "Marvell MV78xx0"
  416. select CPU_FEROCEON
  417. select PCI
  418. select ARCH_REQUIRE_GPIOLIB
  419. select GENERIC_CLOCKEVENTS
  420. select PLAT_ORION
  421. help
  422. Support for the following Marvell MV78xx0 series SoCs:
  423. MV781x0, MV782x0.
  424. config ARCH_ORION5X
  425. bool "Marvell Orion"
  426. depends on MMU
  427. select CPU_FEROCEON
  428. select PCI
  429. select ARCH_REQUIRE_GPIOLIB
  430. select GENERIC_CLOCKEVENTS
  431. select PLAT_ORION
  432. help
  433. Support for the following Marvell Orion 5x series SoCs:
  434. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  435. Orion-2 (5281), Orion-1-90 (6183).
  436. config ARCH_MMP
  437. bool "Marvell PXA168/910/MMP2"
  438. depends on MMU
  439. select ARCH_REQUIRE_GPIOLIB
  440. select COMMON_CLKDEV
  441. select GENERIC_CLOCKEVENTS
  442. select HAVE_SCHED_CLOCK
  443. select TICK_ONESHOT
  444. select PLAT_PXA
  445. select SPARSE_IRQ
  446. help
  447. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  448. config ARCH_KS8695
  449. bool "Micrel/Kendin KS8695"
  450. select CPU_ARM922T
  451. select ARCH_REQUIRE_GPIOLIB
  452. select ARCH_USES_GETTIMEOFFSET
  453. help
  454. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  455. System-on-Chip devices.
  456. config ARCH_NS9XXX
  457. bool "NetSilicon NS9xxx"
  458. select CPU_ARM926T
  459. select GENERIC_GPIO
  460. select GENERIC_CLOCKEVENTS
  461. select HAVE_CLK
  462. help
  463. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  464. System.
  465. <http://www.digi.com/products/microprocessors/index.jsp>
  466. config ARCH_W90X900
  467. bool "Nuvoton W90X900 CPU"
  468. select CPU_ARM926T
  469. select ARCH_REQUIRE_GPIOLIB
  470. select COMMON_CLKDEV
  471. select GENERIC_CLOCKEVENTS
  472. help
  473. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  474. At present, the w90x900 has been renamed nuc900, regarding
  475. the ARM series product line, you can login the following
  476. link address to know more.
  477. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  478. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  479. config ARCH_NUC93X
  480. bool "Nuvoton NUC93X CPU"
  481. select CPU_ARM926T
  482. select COMMON_CLKDEV
  483. help
  484. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  485. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  486. config ARCH_TEGRA
  487. bool "NVIDIA Tegra"
  488. select GENERIC_TIME
  489. select GENERIC_CLOCKEVENTS
  490. select GENERIC_GPIO
  491. select HAVE_CLK
  492. select HAVE_SCHED_CLOCK
  493. select COMMON_CLKDEV
  494. select ARCH_HAS_BARRIERS if CACHE_L2X0
  495. select ARCH_HAS_CPUFREQ
  496. help
  497. This enables support for NVIDIA Tegra based systems (Tegra APX,
  498. Tegra 6xx and Tegra 2 series).
  499. config ARCH_PNX4008
  500. bool "Philips Nexperia PNX4008 Mobile"
  501. select CPU_ARM926T
  502. select COMMON_CLKDEV
  503. select ARCH_USES_GETTIMEOFFSET
  504. help
  505. This enables support for Philips PNX4008 mobile platform.
  506. config ARCH_PXA
  507. bool "PXA2xx/PXA3xx-based"
  508. depends on MMU
  509. select ARCH_MTD_XIP
  510. select ARCH_HAS_CPUFREQ
  511. select COMMON_CLKDEV
  512. select ARCH_REQUIRE_GPIOLIB
  513. select GENERIC_CLOCKEVENTS
  514. select HAVE_SCHED_CLOCK
  515. select TICK_ONESHOT
  516. select PLAT_PXA
  517. select SPARSE_IRQ
  518. help
  519. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  520. config ARCH_MSM
  521. bool "Qualcomm MSM"
  522. select HAVE_CLK
  523. select GENERIC_CLOCKEVENTS
  524. select ARCH_REQUIRE_GPIOLIB
  525. help
  526. Support for Qualcomm MSM/QSD based systems. This runs on the
  527. apps processor of the MSM/QSD and depends on a shared memory
  528. interface to the modem processor which runs the baseband
  529. stack and controls some vital subsystems
  530. (clock and power control, etc).
  531. config ARCH_SHMOBILE
  532. bool "Renesas SH-Mobile"
  533. help
  534. Support for Renesas's SH-Mobile ARM platforms
  535. config ARCH_RPC
  536. bool "RiscPC"
  537. select ARCH_ACORN
  538. select FIQ
  539. select TIMER_ACORN
  540. select ARCH_MAY_HAVE_PC_FDC
  541. select HAVE_PATA_PLATFORM
  542. select ISA_DMA_API
  543. select NO_IOPORT
  544. select ARCH_SPARSEMEM_ENABLE
  545. select ARCH_USES_GETTIMEOFFSET
  546. help
  547. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  548. CD-ROM interface, serial and parallel port, and the floppy drive.
  549. config ARCH_SA1100
  550. bool "SA1100-based"
  551. select CPU_SA1100
  552. select ISA
  553. select ARCH_SPARSEMEM_ENABLE
  554. select ARCH_MTD_XIP
  555. select ARCH_HAS_CPUFREQ
  556. select CPU_FREQ
  557. select GENERIC_CLOCKEVENTS
  558. select HAVE_CLK
  559. select HAVE_SCHED_CLOCK
  560. select TICK_ONESHOT
  561. select ARCH_REQUIRE_GPIOLIB
  562. help
  563. Support for StrongARM 11x0 based boards.
  564. config ARCH_S3C2410
  565. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  566. select GENERIC_GPIO
  567. select ARCH_HAS_CPUFREQ
  568. select HAVE_CLK
  569. select ARCH_USES_GETTIMEOFFSET
  570. select HAVE_S3C2410_I2C if I2C
  571. help
  572. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  573. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  574. the Samsung SMDK2410 development board (and derivatives).
  575. Note, the S3C2416 and the S3C2450 are so close that they even share
  576. the same SoC ID code. This means that there is no seperate machine
  577. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  578. config ARCH_S3C64XX
  579. bool "Samsung S3C64XX"
  580. select PLAT_SAMSUNG
  581. select CPU_V6
  582. select ARM_VIC
  583. select HAVE_CLK
  584. select NO_IOPORT
  585. select ARCH_USES_GETTIMEOFFSET
  586. select ARCH_HAS_CPUFREQ
  587. select ARCH_REQUIRE_GPIOLIB
  588. select SAMSUNG_CLKSRC
  589. select SAMSUNG_IRQ_VIC_TIMER
  590. select SAMSUNG_IRQ_UART
  591. select S3C_GPIO_TRACK
  592. select S3C_GPIO_PULL_UPDOWN
  593. select S3C_GPIO_CFG_S3C24XX
  594. select S3C_GPIO_CFG_S3C64XX
  595. select S3C_DEV_NAND
  596. select USB_ARCH_HAS_OHCI
  597. select SAMSUNG_GPIOLIB_4BIT
  598. select HAVE_S3C2410_I2C if I2C
  599. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  600. help
  601. Samsung S3C64XX series based systems
  602. config ARCH_S5P64X0
  603. bool "Samsung S5P6440 S5P6450"
  604. select CPU_V6
  605. select GENERIC_GPIO
  606. select HAVE_CLK
  607. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  608. select ARCH_USES_GETTIMEOFFSET
  609. select HAVE_S3C2410_I2C if I2C
  610. select HAVE_S3C_RTC if RTC_CLASS
  611. help
  612. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  613. SMDK6450.
  614. config ARCH_S5P6442
  615. bool "Samsung S5P6442"
  616. select CPU_V6
  617. select GENERIC_GPIO
  618. select HAVE_CLK
  619. select ARCH_USES_GETTIMEOFFSET
  620. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  621. help
  622. Samsung S5P6442 CPU based systems
  623. config ARCH_S5PC100
  624. bool "Samsung S5PC100"
  625. select GENERIC_GPIO
  626. select HAVE_CLK
  627. select CPU_V7
  628. select ARM_L1_CACHE_SHIFT_6
  629. select ARCH_USES_GETTIMEOFFSET
  630. select HAVE_S3C2410_I2C if I2C
  631. select HAVE_S3C_RTC if RTC_CLASS
  632. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  633. help
  634. Samsung S5PC100 series based systems
  635. config ARCH_S5PV210
  636. bool "Samsung S5PV210/S5PC110"
  637. select CPU_V7
  638. select ARCH_SPARSEMEM_ENABLE
  639. select GENERIC_GPIO
  640. select HAVE_CLK
  641. select ARM_L1_CACHE_SHIFT_6
  642. select ARCH_HAS_CPUFREQ
  643. select ARCH_USES_GETTIMEOFFSET
  644. select HAVE_S3C2410_I2C if I2C
  645. select HAVE_S3C_RTC if RTC_CLASS
  646. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  647. help
  648. Samsung S5PV210/S5PC110 series based systems
  649. config ARCH_S5PV310
  650. bool "Samsung S5PV310/S5PC210"
  651. select CPU_V7
  652. select ARCH_SPARSEMEM_ENABLE
  653. select GENERIC_GPIO
  654. select HAVE_CLK
  655. select GENERIC_CLOCKEVENTS
  656. select HAVE_S3C_RTC if RTC_CLASS
  657. select HAVE_S3C2410_I2C if I2C
  658. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  659. help
  660. Samsung S5PV310 series based systems
  661. config ARCH_SHARK
  662. bool "Shark"
  663. select CPU_SA110
  664. select ISA
  665. select ISA_DMA
  666. select ZONE_DMA
  667. select PCI
  668. select ARCH_USES_GETTIMEOFFSET
  669. help
  670. Support for the StrongARM based Digital DNARD machine, also known
  671. as "Shark" (<http://www.shark-linux.de/shark.html>).
  672. config ARCH_TCC_926
  673. bool "Telechips TCC ARM926-based systems"
  674. select CPU_ARM926T
  675. select HAVE_CLK
  676. select COMMON_CLKDEV
  677. select GENERIC_CLOCKEVENTS
  678. help
  679. Support for Telechips TCC ARM926-based systems.
  680. config ARCH_LH7A40X
  681. bool "Sharp LH7A40X"
  682. select CPU_ARM922T
  683. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  684. select ARCH_USES_GETTIMEOFFSET
  685. help
  686. Say Y here for systems based on one of the Sharp LH7A40X
  687. System on a Chip processors. These CPUs include an ARM922T
  688. core with a wide array of integrated devices for
  689. hand-held and low-power applications.
  690. config ARCH_U300
  691. bool "ST-Ericsson U300 Series"
  692. depends on MMU
  693. select CPU_ARM926T
  694. select HAVE_SCHED_CLOCK
  695. select HAVE_TCM
  696. select ARM_AMBA
  697. select ARM_VIC
  698. select GENERIC_CLOCKEVENTS
  699. select COMMON_CLKDEV
  700. select GENERIC_GPIO
  701. help
  702. Support for ST-Ericsson U300 series mobile platforms.
  703. config ARCH_U8500
  704. bool "ST-Ericsson U8500 Series"
  705. select CPU_V7
  706. select ARM_AMBA
  707. select GENERIC_CLOCKEVENTS
  708. select COMMON_CLKDEV
  709. select ARCH_REQUIRE_GPIOLIB
  710. help
  711. Support for ST-Ericsson's Ux500 architecture
  712. config ARCH_NOMADIK
  713. bool "STMicroelectronics Nomadik"
  714. select ARM_AMBA
  715. select ARM_VIC
  716. select CPU_ARM926T
  717. select COMMON_CLKDEV
  718. select GENERIC_CLOCKEVENTS
  719. select ARCH_REQUIRE_GPIOLIB
  720. help
  721. Support for the Nomadik platform by ST-Ericsson
  722. config ARCH_DAVINCI
  723. bool "TI DaVinci"
  724. select GENERIC_CLOCKEVENTS
  725. select ARCH_REQUIRE_GPIOLIB
  726. select ZONE_DMA
  727. select HAVE_IDE
  728. select COMMON_CLKDEV
  729. select GENERIC_ALLOCATOR
  730. select ARCH_HAS_HOLES_MEMORYMODEL
  731. help
  732. Support for TI's DaVinci platform.
  733. config ARCH_OMAP
  734. bool "TI OMAP"
  735. select HAVE_CLK
  736. select ARCH_REQUIRE_GPIOLIB
  737. select ARCH_HAS_CPUFREQ
  738. select GENERIC_CLOCKEVENTS
  739. select HAVE_SCHED_CLOCK
  740. select ARCH_HAS_HOLES_MEMORYMODEL
  741. help
  742. Support for TI's OMAP platform (OMAP1/2/3/4).
  743. config PLAT_SPEAR
  744. bool "ST SPEAr"
  745. select ARM_AMBA
  746. select ARCH_REQUIRE_GPIOLIB
  747. select COMMON_CLKDEV
  748. select GENERIC_CLOCKEVENTS
  749. select HAVE_CLK
  750. help
  751. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  752. endchoice
  753. #
  754. # This is sorted alphabetically by mach-* pathname. However, plat-*
  755. # Kconfigs may be included either alphabetically (according to the
  756. # plat- suffix) or along side the corresponding mach-* source.
  757. #
  758. source "arch/arm/mach-aaec2000/Kconfig"
  759. source "arch/arm/mach-at91/Kconfig"
  760. source "arch/arm/mach-bcmring/Kconfig"
  761. source "arch/arm/mach-clps711x/Kconfig"
  762. source "arch/arm/mach-cns3xxx/Kconfig"
  763. source "arch/arm/mach-davinci/Kconfig"
  764. source "arch/arm/mach-dove/Kconfig"
  765. source "arch/arm/mach-ep93xx/Kconfig"
  766. source "arch/arm/mach-footbridge/Kconfig"
  767. source "arch/arm/mach-gemini/Kconfig"
  768. source "arch/arm/mach-h720x/Kconfig"
  769. source "arch/arm/mach-integrator/Kconfig"
  770. source "arch/arm/mach-iop32x/Kconfig"
  771. source "arch/arm/mach-iop33x/Kconfig"
  772. source "arch/arm/mach-iop13xx/Kconfig"
  773. source "arch/arm/mach-ixp4xx/Kconfig"
  774. source "arch/arm/mach-ixp2000/Kconfig"
  775. source "arch/arm/mach-ixp23xx/Kconfig"
  776. source "arch/arm/mach-kirkwood/Kconfig"
  777. source "arch/arm/mach-ks8695/Kconfig"
  778. source "arch/arm/mach-lh7a40x/Kconfig"
  779. source "arch/arm/mach-loki/Kconfig"
  780. source "arch/arm/mach-lpc32xx/Kconfig"
  781. source "arch/arm/mach-msm/Kconfig"
  782. source "arch/arm/mach-mv78xx0/Kconfig"
  783. source "arch/arm/plat-mxc/Kconfig"
  784. source "arch/arm/mach-netx/Kconfig"
  785. source "arch/arm/mach-nomadik/Kconfig"
  786. source "arch/arm/plat-nomadik/Kconfig"
  787. source "arch/arm/mach-ns9xxx/Kconfig"
  788. source "arch/arm/mach-nuc93x/Kconfig"
  789. source "arch/arm/plat-omap/Kconfig"
  790. source "arch/arm/mach-omap1/Kconfig"
  791. source "arch/arm/mach-omap2/Kconfig"
  792. source "arch/arm/mach-orion5x/Kconfig"
  793. source "arch/arm/mach-pxa/Kconfig"
  794. source "arch/arm/plat-pxa/Kconfig"
  795. source "arch/arm/mach-mmp/Kconfig"
  796. source "arch/arm/mach-realview/Kconfig"
  797. source "arch/arm/mach-sa1100/Kconfig"
  798. source "arch/arm/plat-samsung/Kconfig"
  799. source "arch/arm/plat-s3c24xx/Kconfig"
  800. source "arch/arm/plat-s5p/Kconfig"
  801. source "arch/arm/plat-spear/Kconfig"
  802. source "arch/arm/plat-tcc/Kconfig"
  803. if ARCH_S3C2410
  804. source "arch/arm/mach-s3c2400/Kconfig"
  805. source "arch/arm/mach-s3c2410/Kconfig"
  806. source "arch/arm/mach-s3c2412/Kconfig"
  807. source "arch/arm/mach-s3c2416/Kconfig"
  808. source "arch/arm/mach-s3c2440/Kconfig"
  809. source "arch/arm/mach-s3c2443/Kconfig"
  810. endif
  811. if ARCH_S3C64XX
  812. source "arch/arm/mach-s3c64xx/Kconfig"
  813. endif
  814. source "arch/arm/mach-s5p64x0/Kconfig"
  815. source "arch/arm/mach-s5p6442/Kconfig"
  816. source "arch/arm/mach-s5pc100/Kconfig"
  817. source "arch/arm/mach-s5pv210/Kconfig"
  818. source "arch/arm/mach-s5pv310/Kconfig"
  819. source "arch/arm/mach-shmobile/Kconfig"
  820. source "arch/arm/plat-stmp3xxx/Kconfig"
  821. source "arch/arm/mach-tegra/Kconfig"
  822. source "arch/arm/mach-u300/Kconfig"
  823. source "arch/arm/mach-ux500/Kconfig"
  824. source "arch/arm/mach-versatile/Kconfig"
  825. source "arch/arm/mach-vexpress/Kconfig"
  826. source "arch/arm/mach-w90x900/Kconfig"
  827. # Definitions to make life easier
  828. config ARCH_ACORN
  829. bool
  830. config PLAT_IOP
  831. bool
  832. select GENERIC_CLOCKEVENTS
  833. select HAVE_SCHED_CLOCK
  834. config PLAT_ORION
  835. bool
  836. select HAVE_SCHED_CLOCK
  837. config PLAT_PXA
  838. bool
  839. config PLAT_VERSATILE
  840. bool
  841. config ARM_TIMER_SP804
  842. bool
  843. source arch/arm/mm/Kconfig
  844. config IWMMXT
  845. bool "Enable iWMMXt support"
  846. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  847. default y if PXA27x || PXA3xx || ARCH_MMP
  848. help
  849. Enable support for iWMMXt context switching at run time if
  850. running on a CPU that supports it.
  851. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  852. config XSCALE_PMU
  853. bool
  854. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  855. default y
  856. config CPU_HAS_PMU
  857. depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
  858. (!ARCH_OMAP3 || OMAP3_EMU)
  859. default y
  860. bool
  861. if !MMU
  862. source "arch/arm/Kconfig-nommu"
  863. endif
  864. config ARM_ERRATA_411920
  865. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  866. depends on CPU_V6
  867. help
  868. Invalidation of the Instruction Cache operation can
  869. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  870. It does not affect the MPCore. This option enables the ARM Ltd.
  871. recommended workaround.
  872. config ARM_ERRATA_430973
  873. bool "ARM errata: Stale prediction on replaced interworking branch"
  874. depends on CPU_V7
  875. help
  876. This option enables the workaround for the 430973 Cortex-A8
  877. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  878. interworking branch is replaced with another code sequence at the
  879. same virtual address, whether due to self-modifying code or virtual
  880. to physical address re-mapping, Cortex-A8 does not recover from the
  881. stale interworking branch prediction. This results in Cortex-A8
  882. executing the new code sequence in the incorrect ARM or Thumb state.
  883. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  884. and also flushes the branch target cache at every context switch.
  885. Note that setting specific bits in the ACTLR register may not be
  886. available in non-secure mode.
  887. config ARM_ERRATA_458693
  888. bool "ARM errata: Processor deadlock when a false hazard is created"
  889. depends on CPU_V7
  890. help
  891. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  892. erratum. For very specific sequences of memory operations, it is
  893. possible for a hazard condition intended for a cache line to instead
  894. be incorrectly associated with a different cache line. This false
  895. hazard might then cause a processor deadlock. The workaround enables
  896. the L1 caching of the NEON accesses and disables the PLD instruction
  897. in the ACTLR register. Note that setting specific bits in the ACTLR
  898. register may not be available in non-secure mode.
  899. config ARM_ERRATA_460075
  900. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  901. depends on CPU_V7
  902. help
  903. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  904. erratum. Any asynchronous access to the L2 cache may encounter a
  905. situation in which recent store transactions to the L2 cache are lost
  906. and overwritten with stale memory contents from external memory. The
  907. workaround disables the write-allocate mode for the L2 cache via the
  908. ACTLR register. Note that setting specific bits in the ACTLR register
  909. may not be available in non-secure mode.
  910. config ARM_ERRATA_742230
  911. bool "ARM errata: DMB operation may be faulty"
  912. depends on CPU_V7 && SMP
  913. help
  914. This option enables the workaround for the 742230 Cortex-A9
  915. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  916. between two write operations may not ensure the correct visibility
  917. ordering of the two writes. This workaround sets a specific bit in
  918. the diagnostic register of the Cortex-A9 which causes the DMB
  919. instruction to behave as a DSB, ensuring the correct behaviour of
  920. the two writes.
  921. config ARM_ERRATA_742231
  922. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  923. depends on CPU_V7 && SMP
  924. help
  925. This option enables the workaround for the 742231 Cortex-A9
  926. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  927. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  928. accessing some data located in the same cache line, may get corrupted
  929. data due to bad handling of the address hazard when the line gets
  930. replaced from one of the CPUs at the same time as another CPU is
  931. accessing it. This workaround sets specific bits in the diagnostic
  932. register of the Cortex-A9 which reduces the linefill issuing
  933. capabilities of the processor.
  934. config PL310_ERRATA_588369
  935. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  936. depends on CACHE_L2X0 && ARCH_OMAP4
  937. help
  938. The PL310 L2 cache controller implements three types of Clean &
  939. Invalidate maintenance operations: by Physical Address
  940. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  941. They are architecturally defined to behave as the execution of a
  942. clean operation followed immediately by an invalidate operation,
  943. both performing to the same memory location. This functionality
  944. is not correctly implemented in PL310 as clean lines are not
  945. invalidated as a result of these operations. Note that this errata
  946. uses Texas Instrument's secure monitor api.
  947. config ARM_ERRATA_720789
  948. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  949. depends on CPU_V7 && SMP
  950. help
  951. This option enables the workaround for the 720789 Cortex-A9 (prior to
  952. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  953. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  954. As a consequence of this erratum, some TLB entries which should be
  955. invalidated are not, resulting in an incoherency in the system page
  956. tables. The workaround changes the TLB flushing routines to invalidate
  957. entries regardless of the ASID.
  958. config ARM_ERRATA_743622
  959. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  960. depends on CPU_V7
  961. help
  962. This option enables the workaround for the 743622 Cortex-A9
  963. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  964. optimisation in the Cortex-A9 Store Buffer may lead to data
  965. corruption. This workaround sets a specific bit in the diagnostic
  966. register of the Cortex-A9 which disables the Store Buffer
  967. optimisation, preventing the defect from occurring. This has no
  968. visible impact on the overall performance or power consumption of the
  969. processor.
  970. endmenu
  971. source "arch/arm/common/Kconfig"
  972. menu "Bus support"
  973. config ARM_AMBA
  974. bool
  975. config ISA
  976. bool
  977. help
  978. Find out whether you have ISA slots on your motherboard. ISA is the
  979. name of a bus system, i.e. the way the CPU talks to the other stuff
  980. inside your box. Other bus systems are PCI, EISA, MicroChannel
  981. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  982. newer boards don't support it. If you have ISA, say Y, otherwise N.
  983. # Select ISA DMA controller support
  984. config ISA_DMA
  985. bool
  986. select ISA_DMA_API
  987. # Select ISA DMA interface
  988. config ISA_DMA_API
  989. bool
  990. config PCI
  991. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE || ARCH_CNS3XXX
  992. help
  993. Find out whether you have a PCI motherboard. PCI is the name of a
  994. bus system, i.e. the way the CPU talks to the other stuff inside
  995. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  996. VESA. If you have PCI, say Y, otherwise N.
  997. config PCI_DOMAINS
  998. bool
  999. depends on PCI
  1000. config PCI_SYSCALL
  1001. def_bool PCI
  1002. # Select the host bridge type
  1003. config PCI_HOST_VIA82C505
  1004. bool
  1005. depends on PCI && ARCH_SHARK
  1006. default y
  1007. config PCI_HOST_ITE8152
  1008. bool
  1009. depends on PCI && MACH_ARMCORE
  1010. default y
  1011. select DMABOUNCE
  1012. source "drivers/pci/Kconfig"
  1013. source "drivers/pcmcia/Kconfig"
  1014. endmenu
  1015. menu "Kernel Features"
  1016. source "kernel/time/Kconfig"
  1017. config SMP
  1018. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  1019. depends on EXPERIMENTAL
  1020. depends on GENERIC_CLOCKEVENTS
  1021. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1022. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1023. ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
  1024. ARCH_MSM_SCORPIONMP
  1025. select USE_GENERIC_SMP_HELPERS
  1026. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1027. help
  1028. This enables support for systems with more than one CPU. If you have
  1029. a system with only one CPU, like most personal computers, say N. If
  1030. you have a system with more than one CPU, say Y.
  1031. If you say N here, the kernel will run on single and multiprocessor
  1032. machines, but will use only one CPU of a multiprocessor machine. If
  1033. you say Y here, the kernel will run on many, but not all, single
  1034. processor machines. On a single processor machine, the kernel will
  1035. run faster if you say N here.
  1036. See also <file:Documentation/i386/IO-APIC.txt>,
  1037. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1038. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1039. If you don't know what to do here, say N.
  1040. config SMP_ON_UP
  1041. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1042. depends on EXPERIMENTAL
  1043. depends on SMP && !XIP && !THUMB2_KERNEL
  1044. default y
  1045. help
  1046. SMP kernels contain instructions which fail on non-SMP processors.
  1047. Enabling this option allows the kernel to modify itself to make
  1048. these instructions safe. Disabling it allows about 1K of space
  1049. savings.
  1050. If you don't know what to do here, say Y.
  1051. config HAVE_ARM_SCU
  1052. bool
  1053. depends on SMP
  1054. help
  1055. This option enables support for the ARM system coherency unit
  1056. config HAVE_ARM_TWD
  1057. bool
  1058. depends on SMP
  1059. help
  1060. This options enables support for the ARM timer and watchdog unit
  1061. choice
  1062. prompt "Memory split"
  1063. default VMSPLIT_3G
  1064. help
  1065. Select the desired split between kernel and user memory.
  1066. If you are not absolutely sure what you are doing, leave this
  1067. option alone!
  1068. config VMSPLIT_3G
  1069. bool "3G/1G user/kernel split"
  1070. config VMSPLIT_2G
  1071. bool "2G/2G user/kernel split"
  1072. config VMSPLIT_1G
  1073. bool "1G/3G user/kernel split"
  1074. endchoice
  1075. config PAGE_OFFSET
  1076. hex
  1077. default 0x40000000 if VMSPLIT_1G
  1078. default 0x80000000 if VMSPLIT_2G
  1079. default 0xC0000000
  1080. config NR_CPUS
  1081. int "Maximum number of CPUs (2-32)"
  1082. range 2 32
  1083. depends on SMP
  1084. default "4"
  1085. config HOTPLUG_CPU
  1086. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1087. depends on SMP && HOTPLUG && EXPERIMENTAL
  1088. depends on !ARCH_MSM
  1089. help
  1090. Say Y here to experiment with turning CPUs off and on. CPUs
  1091. can be controlled through /sys/devices/system/cpu.
  1092. config LOCAL_TIMERS
  1093. bool "Use local timer interrupts"
  1094. depends on SMP
  1095. default y
  1096. select HAVE_ARM_TWD if !ARCH_MSM_SCORPIONMP
  1097. help
  1098. Enable support for local timers on SMP platforms, rather then the
  1099. legacy IPI broadcast method. Local timers allows the system
  1100. accounting to be spread across the timer interval, preventing a
  1101. "thundering herd" at every timer tick.
  1102. source kernel/Kconfig.preempt
  1103. config HZ
  1104. int
  1105. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1106. ARCH_S5P6442 || ARCH_S5PV210 || ARCH_S5PV310
  1107. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1108. default AT91_TIMER_HZ if ARCH_AT91
  1109. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1110. default 100
  1111. config THUMB2_KERNEL
  1112. bool "Compile the kernel in Thumb-2 mode"
  1113. depends on CPU_V7 && EXPERIMENTAL
  1114. select AEABI
  1115. select ARM_ASM_UNIFIED
  1116. help
  1117. By enabling this option, the kernel will be compiled in
  1118. Thumb-2 mode. A compiler/assembler that understand the unified
  1119. ARM-Thumb syntax is needed.
  1120. If unsure, say N.
  1121. config ARM_ASM_UNIFIED
  1122. bool
  1123. config AEABI
  1124. bool "Use the ARM EABI to compile the kernel"
  1125. help
  1126. This option allows for the kernel to be compiled using the latest
  1127. ARM ABI (aka EABI). This is only useful if you are using a user
  1128. space environment that is also compiled with EABI.
  1129. Since there are major incompatibilities between the legacy ABI and
  1130. EABI, especially with regard to structure member alignment, this
  1131. option also changes the kernel syscall calling convention to
  1132. disambiguate both ABIs and allow for backward compatibility support
  1133. (selected with CONFIG_OABI_COMPAT).
  1134. To use this you need GCC version 4.0.0 or later.
  1135. config OABI_COMPAT
  1136. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1137. depends on AEABI && EXPERIMENTAL
  1138. default y
  1139. help
  1140. This option preserves the old syscall interface along with the
  1141. new (ARM EABI) one. It also provides a compatibility layer to
  1142. intercept syscalls that have structure arguments which layout
  1143. in memory differs between the legacy ABI and the new ARM EABI
  1144. (only for non "thumb" binaries). This option adds a tiny
  1145. overhead to all syscalls and produces a slightly larger kernel.
  1146. If you know you'll be using only pure EABI user space then you
  1147. can say N here. If this option is not selected and you attempt
  1148. to execute a legacy ABI binary then the result will be
  1149. UNPREDICTABLE (in fact it can be predicted that it won't work
  1150. at all). If in doubt say Y.
  1151. config ARCH_HAS_HOLES_MEMORYMODEL
  1152. bool
  1153. config ARCH_SPARSEMEM_ENABLE
  1154. bool
  1155. config ARCH_SPARSEMEM_DEFAULT
  1156. def_bool ARCH_SPARSEMEM_ENABLE
  1157. config ARCH_SELECT_MEMORY_MODEL
  1158. def_bool ARCH_SPARSEMEM_ENABLE
  1159. config HIGHMEM
  1160. bool "High Memory Support (EXPERIMENTAL)"
  1161. depends on MMU && EXPERIMENTAL
  1162. help
  1163. The address space of ARM processors is only 4 Gigabytes large
  1164. and it has to accommodate user address space, kernel address
  1165. space as well as some memory mapped IO. That means that, if you
  1166. have a large amount of physical memory and/or IO, not all of the
  1167. memory can be "permanently mapped" by the kernel. The physical
  1168. memory that is not permanently mapped is called "high memory".
  1169. Depending on the selected kernel/user memory split, minimum
  1170. vmalloc space and actual amount of RAM, you may not need this
  1171. option which should result in a slightly faster kernel.
  1172. If unsure, say n.
  1173. config HIGHPTE
  1174. bool "Allocate 2nd-level pagetables from highmem"
  1175. depends on HIGHMEM
  1176. depends on !OUTER_CACHE
  1177. config HW_PERF_EVENTS
  1178. bool "Enable hardware performance counter support for perf events"
  1179. depends on PERF_EVENTS && CPU_HAS_PMU
  1180. default y
  1181. help
  1182. Enable hardware performance counter support for perf events. If
  1183. disabled, perf events will use software events only.
  1184. config SPARSE_IRQ
  1185. def_bool n
  1186. help
  1187. This enables support for sparse irqs. This is useful in general
  1188. as most CPUs have a fairly sparse array of IRQ vectors, which
  1189. the irq_desc then maps directly on to. Systems with a high
  1190. number of off-chip IRQs will want to treat this as
  1191. experimental until they have been independently verified.
  1192. source "mm/Kconfig"
  1193. config FORCE_MAX_ZONEORDER
  1194. int "Maximum zone order" if ARCH_SHMOBILE
  1195. range 11 64 if ARCH_SHMOBILE
  1196. default "9" if SA1111
  1197. default "11"
  1198. help
  1199. The kernel memory allocator divides physically contiguous memory
  1200. blocks into "zones", where each zone is a power of two number of
  1201. pages. This option selects the largest power of two that the kernel
  1202. keeps in the memory allocator. If you need to allocate very large
  1203. blocks of physically contiguous memory, then you may need to
  1204. increase this value.
  1205. This config option is actually maximum order plus one. For example,
  1206. a value of 11 means that the largest free memory block is 2^10 pages.
  1207. config LEDS
  1208. bool "Timer and CPU usage LEDs"
  1209. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1210. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1211. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1212. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1213. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1214. ARCH_AT91 || ARCH_DAVINCI || \
  1215. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1216. help
  1217. If you say Y here, the LEDs on your machine will be used
  1218. to provide useful information about your current system status.
  1219. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1220. be able to select which LEDs are active using the options below. If
  1221. you are compiling a kernel for the EBSA-110 or the LART however, the
  1222. red LED will simply flash regularly to indicate that the system is
  1223. still functional. It is safe to say Y here if you have a CATS
  1224. system, but the driver will do nothing.
  1225. config LEDS_TIMER
  1226. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1227. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1228. || MACH_OMAP_PERSEUS2
  1229. depends on LEDS
  1230. depends on !GENERIC_CLOCKEVENTS
  1231. default y if ARCH_EBSA110
  1232. help
  1233. If you say Y here, one of the system LEDs (the green one on the
  1234. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1235. will flash regularly to indicate that the system is still
  1236. operational. This is mainly useful to kernel hackers who are
  1237. debugging unstable kernels.
  1238. The LART uses the same LED for both Timer LED and CPU usage LED
  1239. functions. You may choose to use both, but the Timer LED function
  1240. will overrule the CPU usage LED.
  1241. config LEDS_CPU
  1242. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1243. !ARCH_OMAP) \
  1244. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1245. || MACH_OMAP_PERSEUS2
  1246. depends on LEDS
  1247. help
  1248. If you say Y here, the red LED will be used to give a good real
  1249. time indication of CPU usage, by lighting whenever the idle task
  1250. is not currently executing.
  1251. The LART uses the same LED for both Timer LED and CPU usage LED
  1252. functions. You may choose to use both, but the Timer LED function
  1253. will overrule the CPU usage LED.
  1254. config ALIGNMENT_TRAP
  1255. bool
  1256. depends on CPU_CP15_MMU
  1257. default y if !ARCH_EBSA110
  1258. select HAVE_PROC_CPU if PROC_FS
  1259. help
  1260. ARM processors cannot fetch/store information which is not
  1261. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1262. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1263. fetch/store instructions will be emulated in software if you say
  1264. here, which has a severe performance impact. This is necessary for
  1265. correct operation of some network protocols. With an IP-only
  1266. configuration it is safe to say N, otherwise say Y.
  1267. config UACCESS_WITH_MEMCPY
  1268. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1269. depends on MMU && EXPERIMENTAL
  1270. default y if CPU_FEROCEON
  1271. help
  1272. Implement faster copy_to_user and clear_user methods for CPU
  1273. cores where a 8-word STM instruction give significantly higher
  1274. memory write throughput than a sequence of individual 32bit stores.
  1275. A possible side effect is a slight increase in scheduling latency
  1276. between threads sharing the same address space if they invoke
  1277. such copy operations with large buffers.
  1278. However, if the CPU data cache is using a write-allocate mode,
  1279. this option is unlikely to provide any performance gain.
  1280. config SECCOMP
  1281. bool
  1282. prompt "Enable seccomp to safely compute untrusted bytecode"
  1283. ---help---
  1284. This kernel feature is useful for number crunching applications
  1285. that may need to compute untrusted bytecode during their
  1286. execution. By using pipes or other transports made available to
  1287. the process as file descriptors supporting the read/write
  1288. syscalls, it's possible to isolate those applications in
  1289. their own address space using seccomp. Once seccomp is
  1290. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1291. and the task is only allowed to execute a few safe syscalls
  1292. defined by each seccomp mode.
  1293. config CC_STACKPROTECTOR
  1294. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1295. help
  1296. This option turns on the -fstack-protector GCC feature. This
  1297. feature puts, at the beginning of functions, a canary value on
  1298. the stack just before the return address, and validates
  1299. the value just before actually returning. Stack based buffer
  1300. overflows (that need to overwrite this return address) now also
  1301. overwrite the canary, which gets detected and the attack is then
  1302. neutralized via a kernel panic.
  1303. This feature requires gcc version 4.2 or above.
  1304. config DEPRECATED_PARAM_STRUCT
  1305. bool "Provide old way to pass kernel parameters"
  1306. help
  1307. This was deprecated in 2001 and announced to live on for 5 years.
  1308. Some old boot loaders still use this way.
  1309. endmenu
  1310. menu "Boot options"
  1311. # Compressed boot loader in ROM. Yes, we really want to ask about
  1312. # TEXT and BSS so we preserve their values in the config files.
  1313. config ZBOOT_ROM_TEXT
  1314. hex "Compressed ROM boot loader base address"
  1315. default "0"
  1316. help
  1317. The physical address at which the ROM-able zImage is to be
  1318. placed in the target. Platforms which normally make use of
  1319. ROM-able zImage formats normally set this to a suitable
  1320. value in their defconfig file.
  1321. If ZBOOT_ROM is not enabled, this has no effect.
  1322. config ZBOOT_ROM_BSS
  1323. hex "Compressed ROM boot loader BSS address"
  1324. default "0"
  1325. help
  1326. The base address of an area of read/write memory in the target
  1327. for the ROM-able zImage which must be available while the
  1328. decompressor is running. It must be large enough to hold the
  1329. entire decompressed kernel plus an additional 128 KiB.
  1330. Platforms which normally make use of ROM-able zImage formats
  1331. normally set this to a suitable value in their defconfig file.
  1332. If ZBOOT_ROM is not enabled, this has no effect.
  1333. config ZBOOT_ROM
  1334. bool "Compressed boot loader in ROM/flash"
  1335. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1336. help
  1337. Say Y here if you intend to execute your compressed kernel image
  1338. (zImage) directly from ROM or flash. If unsure, say N.
  1339. config CMDLINE
  1340. string "Default kernel command string"
  1341. default ""
  1342. help
  1343. On some architectures (EBSA110 and CATS), there is currently no way
  1344. for the boot loader to pass arguments to the kernel. For these
  1345. architectures, you should supply some command-line options at build
  1346. time by entering them here. As a minimum, you should specify the
  1347. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1348. config CMDLINE_FORCE
  1349. bool "Always use the default kernel command string"
  1350. depends on CMDLINE != ""
  1351. help
  1352. Always use the default kernel command string, even if the boot
  1353. loader passes other arguments to the kernel.
  1354. This is useful if you cannot or don't want to change the
  1355. command-line options your boot loader passes to the kernel.
  1356. If unsure, say N.
  1357. config XIP_KERNEL
  1358. bool "Kernel Execute-In-Place from ROM"
  1359. depends on !ZBOOT_ROM
  1360. help
  1361. Execute-In-Place allows the kernel to run from non-volatile storage
  1362. directly addressable by the CPU, such as NOR flash. This saves RAM
  1363. space since the text section of the kernel is not loaded from flash
  1364. to RAM. Read-write sections, such as the data section and stack,
  1365. are still copied to RAM. The XIP kernel is not compressed since
  1366. it has to run directly from flash, so it will take more space to
  1367. store it. The flash address used to link the kernel object files,
  1368. and for storing it, is configuration dependent. Therefore, if you
  1369. say Y here, you must know the proper physical address where to
  1370. store the kernel image depending on your own flash memory usage.
  1371. Also note that the make target becomes "make xipImage" rather than
  1372. "make zImage" or "make Image". The final kernel binary to put in
  1373. ROM memory will be arch/arm/boot/xipImage.
  1374. If unsure, say N.
  1375. config XIP_PHYS_ADDR
  1376. hex "XIP Kernel Physical Location"
  1377. depends on XIP_KERNEL
  1378. default "0x00080000"
  1379. help
  1380. This is the physical address in your flash memory the kernel will
  1381. be linked for and stored to. This address is dependent on your
  1382. own flash usage.
  1383. config KEXEC
  1384. bool "Kexec system call (EXPERIMENTAL)"
  1385. depends on EXPERIMENTAL
  1386. help
  1387. kexec is a system call that implements the ability to shutdown your
  1388. current kernel, and to start another kernel. It is like a reboot
  1389. but it is independent of the system firmware. And like a reboot
  1390. you can start any kernel with it, not just Linux.
  1391. It is an ongoing process to be certain the hardware in a machine
  1392. is properly shutdown, so do not be surprised if this code does not
  1393. initially work for you. It may help to enable device hotplugging
  1394. support.
  1395. config ATAGS_PROC
  1396. bool "Export atags in procfs"
  1397. depends on KEXEC
  1398. default y
  1399. help
  1400. Should the atags used to boot the kernel be exported in an "atags"
  1401. file in procfs. Useful with kexec.
  1402. config AUTO_ZRELADDR
  1403. bool "Auto calculation of the decompressed kernel image address"
  1404. depends on !ZBOOT_ROM && !ARCH_U300
  1405. help
  1406. ZRELADDR is the physical address where the decompressed kernel
  1407. image will be placed. If AUTO_ZRELADDR is selected, the address
  1408. will be determined at run-time by masking the current IP with
  1409. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1410. from start of memory.
  1411. endmenu
  1412. menu "CPU Power Management"
  1413. if ARCH_HAS_CPUFREQ
  1414. source "drivers/cpufreq/Kconfig"
  1415. config CPU_FREQ_IMX
  1416. tristate "CPUfreq driver for i.MX CPUs"
  1417. depends on ARCH_MXC && CPU_FREQ
  1418. help
  1419. This enables the CPUfreq driver for i.MX CPUs.
  1420. config CPU_FREQ_SA1100
  1421. bool
  1422. config CPU_FREQ_SA1110
  1423. bool
  1424. config CPU_FREQ_INTEGRATOR
  1425. tristate "CPUfreq driver for ARM Integrator CPUs"
  1426. depends on ARCH_INTEGRATOR && CPU_FREQ
  1427. default y
  1428. help
  1429. This enables the CPUfreq driver for ARM Integrator CPUs.
  1430. For details, take a look at <file:Documentation/cpu-freq>.
  1431. If in doubt, say Y.
  1432. config CPU_FREQ_PXA
  1433. bool
  1434. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1435. default y
  1436. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1437. config CPU_FREQ_S3C64XX
  1438. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1439. depends on CPU_FREQ && CPU_S3C6410
  1440. config CPU_FREQ_S3C
  1441. bool
  1442. help
  1443. Internal configuration node for common cpufreq on Samsung SoC
  1444. config CPU_FREQ_S3C24XX
  1445. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1446. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1447. select CPU_FREQ_S3C
  1448. help
  1449. This enables the CPUfreq driver for the Samsung S3C24XX family
  1450. of CPUs.
  1451. For details, take a look at <file:Documentation/cpu-freq>.
  1452. If in doubt, say N.
  1453. config CPU_FREQ_S3C24XX_PLL
  1454. bool "Support CPUfreq changing of PLL frequency"
  1455. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1456. help
  1457. Compile in support for changing the PLL frequency from the
  1458. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1459. after a frequency change, so by default it is not enabled.
  1460. This also means that the PLL tables for the selected CPU(s) will
  1461. be built which may increase the size of the kernel image.
  1462. config CPU_FREQ_S3C24XX_DEBUG
  1463. bool "Debug CPUfreq Samsung driver core"
  1464. depends on CPU_FREQ_S3C24XX
  1465. help
  1466. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1467. config CPU_FREQ_S3C24XX_IODEBUG
  1468. bool "Debug CPUfreq Samsung driver IO timing"
  1469. depends on CPU_FREQ_S3C24XX
  1470. help
  1471. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1472. config CPU_FREQ_S3C24XX_DEBUGFS
  1473. bool "Export debugfs for CPUFreq"
  1474. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1475. help
  1476. Export status information via debugfs.
  1477. endif
  1478. source "drivers/cpuidle/Kconfig"
  1479. endmenu
  1480. menu "Floating point emulation"
  1481. comment "At least one emulation must be selected"
  1482. config FPE_NWFPE
  1483. bool "NWFPE math emulation"
  1484. depends on !AEABI || OABI_COMPAT
  1485. ---help---
  1486. Say Y to include the NWFPE floating point emulator in the kernel.
  1487. This is necessary to run most binaries. Linux does not currently
  1488. support floating point hardware so you need to say Y here even if
  1489. your machine has an FPA or floating point co-processor podule.
  1490. You may say N here if you are going to load the Acorn FPEmulator
  1491. early in the bootup.
  1492. config FPE_NWFPE_XP
  1493. bool "Support extended precision"
  1494. depends on FPE_NWFPE
  1495. help
  1496. Say Y to include 80-bit support in the kernel floating-point
  1497. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1498. Note that gcc does not generate 80-bit operations by default,
  1499. so in most cases this option only enlarges the size of the
  1500. floating point emulator without any good reason.
  1501. You almost surely want to say N here.
  1502. config FPE_FASTFPE
  1503. bool "FastFPE math emulation (EXPERIMENTAL)"
  1504. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1505. ---help---
  1506. Say Y here to include the FAST floating point emulator in the kernel.
  1507. This is an experimental much faster emulator which now also has full
  1508. precision for the mantissa. It does not support any exceptions.
  1509. It is very simple, and approximately 3-6 times faster than NWFPE.
  1510. It should be sufficient for most programs. It may be not suitable
  1511. for scientific calculations, but you have to check this for yourself.
  1512. If you do not feel you need a faster FP emulation you should better
  1513. choose NWFPE.
  1514. config VFP
  1515. bool "VFP-format floating point maths"
  1516. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1517. help
  1518. Say Y to include VFP support code in the kernel. This is needed
  1519. if your hardware includes a VFP unit.
  1520. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1521. release notes and additional status information.
  1522. Say N if your target does not have VFP hardware.
  1523. config VFPv3
  1524. bool
  1525. depends on VFP
  1526. default y if CPU_V7
  1527. config NEON
  1528. bool "Advanced SIMD (NEON) Extension support"
  1529. depends on VFPv3 && CPU_V7
  1530. help
  1531. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1532. Extension.
  1533. endmenu
  1534. menu "Userspace binary formats"
  1535. source "fs/Kconfig.binfmt"
  1536. config ARTHUR
  1537. tristate "RISC OS personality"
  1538. depends on !AEABI
  1539. help
  1540. Say Y here to include the kernel code necessary if you want to run
  1541. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1542. experimental; if this sounds frightening, say N and sleep in peace.
  1543. You can also say M here to compile this support as a module (which
  1544. will be called arthur).
  1545. endmenu
  1546. menu "Power management options"
  1547. source "kernel/power/Kconfig"
  1548. config ARCH_SUSPEND_POSSIBLE
  1549. def_bool y
  1550. endmenu
  1551. source "net/Kconfig"
  1552. source "drivers/Kconfig"
  1553. source "fs/Kconfig"
  1554. source "arch/arm/Kconfig.debug"
  1555. source "security/Kconfig"
  1556. source "crypto/Kconfig"
  1557. source "lib/Kconfig"