Kconfig 58 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991001011021031041051061071081091101111121131141151161171181191201211221231241251261271281291301311321331341351361371381391401411421431441451461471481491501511521531541551561571581591601611621631641651661671681691701711721731741751761771781791801811821831841851861871881891901911921931941951961971981992002012022032042052062072082092102112122132142152162172182192202212222232242252262272282292302312322332342352362372382392402412422432442452462472482492502512522532542552562572582592602612622632642652662672682692702712722732742752762772782792802812822832842852862872882892902912922932942952962972982993003013023033043053063073083093103113123133143153163173183193203213223233243253263273283293303313323333343353363373383393403413423433443453463473483493503513523533543553563573583593603613623633643653663673683693703713723733743753763773783793803813823833843853863873883893903913923933943953963973983994004014024034044054064074084094104114124134144154164174184194204214224234244254264274284294304314324334344354364374384394404414424434444454464474484494504514524534544554564574584594604614624634644654664674684694704714724734744754764774784794804814824834844854864874884894904914924934944954964974984995005015025035045055065075085095105115125135145155165175185195205215225235245255265275285295305315325335345355365375385395405415425435445455465475485495505515525535545555565575585595605615625635645655665675685695705715725735745755765775785795805815825835845855865875885895905915925935945955965975985996006016026036046056066076086096106116126136146156166176186196206216226236246256266276286296306316326336346356366376386396406416426436446456466476486496506516526536546556566576586596606616626636646656666676686696706716726736746756766776786796806816826836846856866876886896906916926936946956966976986997007017027037047057067077087097107117127137147157167177187197207217227237247257267277287297307317327337347357367377387397407417427437447457467477487497507517527537547557567577587597607617627637647657667677687697707717727737747757767777787797807817827837847857867877887897907917927937947957967977987998008018028038048058068078088098108118128138148158168178188198208218228238248258268278288298308318328338348358368378388398408418428438448458468478488498508518528538548558568578588598608618628638648658668678688698708718728738748758768778788798808818828838848858868878888898908918928938948958968978988999009019029039049059069079089099109119129139149159169179189199209219229239249259269279289299309319329339349359369379389399409419429439449459469479489499509519529539549559569579589599609619629639649659669679689699709719729739749759769779789799809819829839849859869879889899909919929939949959969979989991000100110021003100410051006100710081009101010111012101310141015101610171018101910201021102210231024102510261027102810291030103110321033103410351036103710381039104010411042104310441045104610471048104910501051105210531054105510561057105810591060106110621063106410651066106710681069107010711072107310741075107610771078107910801081108210831084108510861087108810891090109110921093109410951096109710981099110011011102110311041105110611071108110911101111111211131114111511161117111811191120112111221123112411251126112711281129113011311132113311341135113611371138113911401141114211431144114511461147114811491150115111521153115411551156115711581159116011611162116311641165116611671168116911701171117211731174117511761177117811791180118111821183118411851186118711881189119011911192119311941195119611971198119912001201120212031204120512061207120812091210121112121213121412151216121712181219122012211222122312241225122612271228122912301231123212331234123512361237123812391240124112421243124412451246124712481249125012511252125312541255125612571258125912601261126212631264126512661267126812691270127112721273127412751276127712781279128012811282128312841285128612871288128912901291129212931294129512961297129812991300130113021303130413051306130713081309131013111312131313141315131613171318131913201321132213231324132513261327132813291330133113321333133413351336133713381339134013411342134313441345134613471348134913501351135213531354135513561357135813591360136113621363136413651366136713681369137013711372137313741375137613771378137913801381138213831384138513861387138813891390139113921393139413951396139713981399140014011402140314041405140614071408140914101411141214131414141514161417141814191420142114221423142414251426142714281429143014311432143314341435143614371438143914401441144214431444144514461447144814491450145114521453145414551456145714581459146014611462146314641465146614671468146914701471147214731474147514761477147814791480148114821483148414851486148714881489149014911492149314941495149614971498149915001501150215031504150515061507150815091510151115121513151415151516151715181519152015211522152315241525152615271528152915301531153215331534153515361537153815391540154115421543154415451546154715481549155015511552155315541555155615571558155915601561156215631564156515661567156815691570157115721573157415751576157715781579158015811582158315841585158615871588158915901591159215931594159515961597159815991600160116021603160416051606160716081609161016111612161316141615161616171618161916201621162216231624162516261627162816291630163116321633163416351636163716381639164016411642164316441645164616471648164916501651165216531654165516561657165816591660166116621663166416651666166716681669167016711672167316741675167616771678167916801681168216831684168516861687168816891690169116921693169416951696169716981699170017011702170317041705170617071708170917101711171217131714171517161717171817191720172117221723172417251726172717281729173017311732173317341735173617371738173917401741174217431744174517461747174817491750175117521753175417551756175717581759176017611762176317641765176617671768176917701771177217731774177517761777177817791780178117821783178417851786178717881789179017911792179317941795179617971798179918001801180218031804180518061807180818091810181118121813181418151816181718181819182018211822182318241825182618271828182918301831183218331834183518361837183818391840184118421843184418451846184718481849185018511852185318541855185618571858185918601861186218631864186518661867186818691870187118721873187418751876187718781879188018811882188318841885188618871888188918901891189218931894189518961897189818991900190119021903190419051906190719081909191019111912191319141915191619171918191919201921192219231924192519261927192819291930193119321933193419351936193719381939194019411942194319441945194619471948194919501951195219531954195519561957195819591960196119621963196419651966196719681969197019711972197319741975197619771978197919801981198219831984198519861987198819891990199119921993199419951996199719981999200020012002200320042005200620072008200920102011201220132014201520162017201820192020202120222023202420252026202720282029203020312032203320342035203620372038203920402041204220432044204520462047
  1. config ARM
  2. bool
  3. default y
  4. select HAVE_AOUT
  5. select HAVE_DMA_API_DEBUG
  6. select HAVE_IDE
  7. select HAVE_MEMBLOCK
  8. select RTC_LIB
  9. select SYS_SUPPORTS_APM_EMULATION
  10. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  11. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  12. select HAVE_ARCH_KGDB
  13. select HAVE_KPROBES if (!XIP_KERNEL && !THUMB2_KERNEL)
  14. select HAVE_KRETPROBES if (HAVE_KPROBES)
  15. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  16. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  17. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  18. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  19. select HAVE_GENERIC_DMA_COHERENT
  20. select HAVE_KERNEL_GZIP
  21. select HAVE_KERNEL_LZO
  22. select HAVE_KERNEL_LZMA
  23. select HAVE_IRQ_WORK
  24. select HAVE_PERF_EVENTS
  25. select PERF_USE_VMALLOC
  26. select HAVE_REGS_AND_STACK_ACCESS_API
  27. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  28. select HAVE_C_RECORDMCOUNT
  29. select HAVE_GENERIC_HARDIRQS
  30. select HAVE_SPARSE_IRQ
  31. select GENERIC_IRQ_SHOW
  32. help
  33. The ARM series is a line of low-power-consumption RISC chip designs
  34. licensed by ARM Ltd and targeted at embedded applications and
  35. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  36. manufactured, but legacy ARM-based PC hardware remains popular in
  37. Europe. There is an ARM Linux project with a web page at
  38. <http://www.arm.linux.org.uk/>.
  39. config HAVE_PWM
  40. bool
  41. config MIGHT_HAVE_PCI
  42. bool
  43. config SYS_SUPPORTS_APM_EMULATION
  44. bool
  45. config HAVE_SCHED_CLOCK
  46. bool
  47. config GENERIC_GPIO
  48. bool
  49. config ARCH_USES_GETTIMEOFFSET
  50. bool
  51. default n
  52. config GENERIC_CLOCKEVENTS
  53. bool
  54. config GENERIC_CLOCKEVENTS_BROADCAST
  55. bool
  56. depends on GENERIC_CLOCKEVENTS
  57. default y if SMP
  58. config KTIME_SCALAR
  59. bool
  60. default y
  61. config HAVE_TCM
  62. bool
  63. select GENERIC_ALLOCATOR
  64. config HAVE_PROC_CPU
  65. bool
  66. config NO_IOPORT
  67. bool
  68. config EISA
  69. bool
  70. ---help---
  71. The Extended Industry Standard Architecture (EISA) bus was
  72. developed as an open alternative to the IBM MicroChannel bus.
  73. The EISA bus provided some of the features of the IBM MicroChannel
  74. bus while maintaining backward compatibility with cards made for
  75. the older ISA bus. The EISA bus saw limited use between 1988 and
  76. 1995 when it was made obsolete by the PCI bus.
  77. Say Y here if you are building a kernel for an EISA-based machine.
  78. Otherwise, say N.
  79. config SBUS
  80. bool
  81. config MCA
  82. bool
  83. help
  84. MicroChannel Architecture is found in some IBM PS/2 machines and
  85. laptops. It is a bus system similar to PCI or ISA. See
  86. <file:Documentation/mca.txt> (and especially the web page given
  87. there) before attempting to build an MCA bus kernel.
  88. config STACKTRACE_SUPPORT
  89. bool
  90. default y
  91. config HAVE_LATENCYTOP_SUPPORT
  92. bool
  93. depends on !SMP
  94. default y
  95. config LOCKDEP_SUPPORT
  96. bool
  97. default y
  98. config TRACE_IRQFLAGS_SUPPORT
  99. bool
  100. default y
  101. config HARDIRQS_SW_RESEND
  102. bool
  103. default y
  104. config GENERIC_IRQ_PROBE
  105. bool
  106. default y
  107. config GENERIC_LOCKBREAK
  108. bool
  109. default y
  110. depends on SMP && PREEMPT
  111. config RWSEM_GENERIC_SPINLOCK
  112. bool
  113. default y
  114. config RWSEM_XCHGADD_ALGORITHM
  115. bool
  116. config ARCH_HAS_ILOG2_U32
  117. bool
  118. config ARCH_HAS_ILOG2_U64
  119. bool
  120. config ARCH_HAS_CPUFREQ
  121. bool
  122. help
  123. Internal node to signify that the ARCH has CPUFREQ support
  124. and that the relevant menu configurations are displayed for
  125. it.
  126. config ARCH_HAS_CPU_IDLE_WAIT
  127. def_bool y
  128. config GENERIC_HWEIGHT
  129. bool
  130. default y
  131. config GENERIC_CALIBRATE_DELAY
  132. bool
  133. default y
  134. config ARCH_MAY_HAVE_PC_FDC
  135. bool
  136. config ZONE_DMA
  137. bool
  138. config NEED_DMA_MAP_STATE
  139. def_bool y
  140. config GENERIC_ISA_DMA
  141. bool
  142. config FIQ
  143. bool
  144. config ARCH_MTD_XIP
  145. bool
  146. config VECTORS_BASE
  147. hex
  148. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  149. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  150. default 0x00000000
  151. help
  152. The base address of exception vectors.
  153. config ARM_PATCH_PHYS_VIRT
  154. bool "Patch physical to virtual translations at runtime (EXPERIMENTAL)"
  155. depends on EXPERIMENTAL
  156. depends on !XIP_KERNEL && MMU
  157. depends on !ARCH_REALVIEW || !SPARSEMEM
  158. help
  159. Patch phys-to-virt translation functions at runtime according to
  160. the position of the kernel in system memory.
  161. This can only be used with non-XIP with MMU kernels where
  162. the base of physical memory is at a 16MB boundary.
  163. config ARM_PATCH_PHYS_VIRT_16BIT
  164. def_bool y
  165. depends on ARM_PATCH_PHYS_VIRT && ARCH_MSM
  166. source "init/Kconfig"
  167. source "kernel/Kconfig.freezer"
  168. menu "System Type"
  169. config MMU
  170. bool "MMU-based Paged Memory Management Support"
  171. default y
  172. help
  173. Select if you want MMU-based virtualised addressing space
  174. support by paged memory management. If unsure, say 'Y'.
  175. #
  176. # The "ARM system type" choice list is ordered alphabetically by option
  177. # text. Please add new entries in the option alphabetic order.
  178. #
  179. choice
  180. prompt "ARM system type"
  181. default ARCH_VERSATILE
  182. config ARCH_INTEGRATOR
  183. bool "ARM Ltd. Integrator family"
  184. select ARM_AMBA
  185. select ARCH_HAS_CPUFREQ
  186. select CLKDEV_LOOKUP
  187. select ICST
  188. select GENERIC_CLOCKEVENTS
  189. select PLAT_VERSATILE
  190. select PLAT_VERSATILE_FPGA_IRQ
  191. help
  192. Support for ARM's Integrator platform.
  193. config ARCH_REALVIEW
  194. bool "ARM Ltd. RealView family"
  195. select ARM_AMBA
  196. select CLKDEV_LOOKUP
  197. select ICST
  198. select GENERIC_CLOCKEVENTS
  199. select ARCH_WANT_OPTIONAL_GPIOLIB
  200. select PLAT_VERSATILE
  201. select PLAT_VERSATILE_CLCD
  202. select ARM_TIMER_SP804
  203. select GPIO_PL061 if GPIOLIB
  204. help
  205. This enables support for ARM Ltd RealView boards.
  206. config ARCH_VERSATILE
  207. bool "ARM Ltd. Versatile family"
  208. select ARM_AMBA
  209. select ARM_VIC
  210. select CLKDEV_LOOKUP
  211. select ICST
  212. select GENERIC_CLOCKEVENTS
  213. select ARCH_WANT_OPTIONAL_GPIOLIB
  214. select PLAT_VERSATILE
  215. select PLAT_VERSATILE_CLCD
  216. select PLAT_VERSATILE_FPGA_IRQ
  217. select ARM_TIMER_SP804
  218. help
  219. This enables support for ARM Ltd Versatile board.
  220. config ARCH_VEXPRESS
  221. bool "ARM Ltd. Versatile Express family"
  222. select ARCH_WANT_OPTIONAL_GPIOLIB
  223. select ARM_AMBA
  224. select ARM_TIMER_SP804
  225. select CLKDEV_LOOKUP
  226. select GENERIC_CLOCKEVENTS
  227. select HAVE_CLK
  228. select HAVE_PATA_PLATFORM
  229. select ICST
  230. select PLAT_VERSATILE
  231. select PLAT_VERSATILE_CLCD
  232. help
  233. This enables support for the ARM Ltd Versatile Express boards.
  234. config ARCH_AT91
  235. bool "Atmel AT91"
  236. select ARCH_REQUIRE_GPIOLIB
  237. select HAVE_CLK
  238. help
  239. This enables support for systems based on the Atmel AT91RM9200,
  240. AT91SAM9 and AT91CAP9 processors.
  241. config ARCH_BCMRING
  242. bool "Broadcom BCMRING"
  243. depends on MMU
  244. select CPU_V6
  245. select ARM_AMBA
  246. select ARM_TIMER_SP804
  247. select CLKDEV_LOOKUP
  248. select GENERIC_CLOCKEVENTS
  249. select ARCH_WANT_OPTIONAL_GPIOLIB
  250. help
  251. Support for Broadcom's BCMRing platform.
  252. config ARCH_CLPS711X
  253. bool "Cirrus Logic CLPS711x/EP721x-based"
  254. select CPU_ARM720T
  255. select ARCH_USES_GETTIMEOFFSET
  256. help
  257. Support for Cirrus Logic 711x/721x based boards.
  258. config ARCH_CNS3XXX
  259. bool "Cavium Networks CNS3XXX family"
  260. select CPU_V6
  261. select GENERIC_CLOCKEVENTS
  262. select ARM_GIC
  263. select MIGHT_HAVE_PCI
  264. select PCI_DOMAINS if PCI
  265. help
  266. Support for Cavium Networks CNS3XXX platform.
  267. config ARCH_GEMINI
  268. bool "Cortina Systems Gemini"
  269. select CPU_FA526
  270. select ARCH_REQUIRE_GPIOLIB
  271. select ARCH_USES_GETTIMEOFFSET
  272. help
  273. Support for the Cortina Systems Gemini family SoCs
  274. config ARCH_EBSA110
  275. bool "EBSA-110"
  276. select CPU_SA110
  277. select ISA
  278. select NO_IOPORT
  279. select ARCH_USES_GETTIMEOFFSET
  280. help
  281. This is an evaluation board for the StrongARM processor available
  282. from Digital. It has limited hardware on-board, including an
  283. Ethernet interface, two PCMCIA sockets, two serial ports and a
  284. parallel port.
  285. config ARCH_EP93XX
  286. bool "EP93xx-based"
  287. select CPU_ARM920T
  288. select ARM_AMBA
  289. select ARM_VIC
  290. select CLKDEV_LOOKUP
  291. select ARCH_REQUIRE_GPIOLIB
  292. select ARCH_HAS_HOLES_MEMORYMODEL
  293. select ARCH_USES_GETTIMEOFFSET
  294. help
  295. This enables support for the Cirrus EP93xx series of CPUs.
  296. config ARCH_FOOTBRIDGE
  297. bool "FootBridge"
  298. select CPU_SA110
  299. select FOOTBRIDGE
  300. select GENERIC_CLOCKEVENTS
  301. help
  302. Support for systems based on the DC21285 companion chip
  303. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  304. config ARCH_MXC
  305. bool "Freescale MXC/iMX-based"
  306. select GENERIC_CLOCKEVENTS
  307. select ARCH_REQUIRE_GPIOLIB
  308. select CLKDEV_LOOKUP
  309. select CLKSRC_MMIO
  310. select HAVE_SCHED_CLOCK
  311. help
  312. Support for Freescale MXC/iMX-based family of processors
  313. config ARCH_MXS
  314. bool "Freescale MXS-based"
  315. select GENERIC_CLOCKEVENTS
  316. select ARCH_REQUIRE_GPIOLIB
  317. select CLKDEV_LOOKUP
  318. select CLKSRC_MMIO
  319. help
  320. Support for Freescale MXS-based family of processors
  321. config ARCH_STMP3XXX
  322. bool "Freescale STMP3xxx"
  323. select CPU_ARM926T
  324. select CLKDEV_LOOKUP
  325. select ARCH_REQUIRE_GPIOLIB
  326. select GENERIC_CLOCKEVENTS
  327. select USB_ARCH_HAS_EHCI
  328. help
  329. Support for systems based on the Freescale 3xxx CPUs.
  330. config ARCH_NETX
  331. bool "Hilscher NetX based"
  332. select CLKSRC_MMIO
  333. select CPU_ARM926T
  334. select ARM_VIC
  335. select GENERIC_CLOCKEVENTS
  336. help
  337. This enables support for systems based on the Hilscher NetX Soc
  338. config ARCH_H720X
  339. bool "Hynix HMS720x-based"
  340. select CPU_ARM720T
  341. select ISA_DMA_API
  342. select ARCH_USES_GETTIMEOFFSET
  343. help
  344. This enables support for systems based on the Hynix HMS720x
  345. config ARCH_IOP13XX
  346. bool "IOP13xx-based"
  347. depends on MMU
  348. select CPU_XSC3
  349. select PLAT_IOP
  350. select PCI
  351. select ARCH_SUPPORTS_MSI
  352. select VMSPLIT_1G
  353. help
  354. Support for Intel's IOP13XX (XScale) family of processors.
  355. config ARCH_IOP32X
  356. bool "IOP32x-based"
  357. depends on MMU
  358. select CPU_XSCALE
  359. select PLAT_IOP
  360. select PCI
  361. select ARCH_REQUIRE_GPIOLIB
  362. help
  363. Support for Intel's 80219 and IOP32X (XScale) family of
  364. processors.
  365. config ARCH_IOP33X
  366. bool "IOP33x-based"
  367. depends on MMU
  368. select CPU_XSCALE
  369. select PLAT_IOP
  370. select PCI
  371. select ARCH_REQUIRE_GPIOLIB
  372. help
  373. Support for Intel's IOP33X (XScale) family of processors.
  374. config ARCH_IXP23XX
  375. bool "IXP23XX-based"
  376. depends on MMU
  377. select CPU_XSC3
  378. select PCI
  379. select ARCH_USES_GETTIMEOFFSET
  380. help
  381. Support for Intel's IXP23xx (XScale) family of processors.
  382. config ARCH_IXP2000
  383. bool "IXP2400/2800-based"
  384. depends on MMU
  385. select CPU_XSCALE
  386. select PCI
  387. select ARCH_USES_GETTIMEOFFSET
  388. help
  389. Support for Intel's IXP2400/2800 (XScale) family of processors.
  390. config ARCH_IXP4XX
  391. bool "IXP4xx-based"
  392. depends on MMU
  393. select CLKSRC_MMIO
  394. select CPU_XSCALE
  395. select GENERIC_GPIO
  396. select GENERIC_CLOCKEVENTS
  397. select HAVE_SCHED_CLOCK
  398. select MIGHT_HAVE_PCI
  399. select DMABOUNCE if PCI
  400. help
  401. Support for Intel's IXP4XX (XScale) family of processors.
  402. config ARCH_DOVE
  403. bool "Marvell Dove"
  404. select CPU_V6K
  405. select PCI
  406. select ARCH_REQUIRE_GPIOLIB
  407. select GENERIC_CLOCKEVENTS
  408. select PLAT_ORION
  409. help
  410. Support for the Marvell Dove SoC 88AP510
  411. config ARCH_KIRKWOOD
  412. bool "Marvell Kirkwood"
  413. select CPU_FEROCEON
  414. select PCI
  415. select ARCH_REQUIRE_GPIOLIB
  416. select GENERIC_CLOCKEVENTS
  417. select PLAT_ORION
  418. help
  419. Support for the following Marvell Kirkwood series SoCs:
  420. 88F6180, 88F6192 and 88F6281.
  421. config ARCH_LOKI
  422. bool "Marvell Loki (88RC8480)"
  423. select CPU_FEROCEON
  424. select GENERIC_CLOCKEVENTS
  425. select PLAT_ORION
  426. help
  427. Support for the Marvell Loki (88RC8480) SoC.
  428. config ARCH_LPC32XX
  429. bool "NXP LPC32XX"
  430. select CLKSRC_MMIO
  431. select CPU_ARM926T
  432. select ARCH_REQUIRE_GPIOLIB
  433. select HAVE_IDE
  434. select ARM_AMBA
  435. select USB_ARCH_HAS_OHCI
  436. select CLKDEV_LOOKUP
  437. select GENERIC_TIME
  438. select GENERIC_CLOCKEVENTS
  439. help
  440. Support for the NXP LPC32XX family of processors
  441. config ARCH_MV78XX0
  442. bool "Marvell MV78xx0"
  443. select CPU_FEROCEON
  444. select PCI
  445. select ARCH_REQUIRE_GPIOLIB
  446. select GENERIC_CLOCKEVENTS
  447. select PLAT_ORION
  448. help
  449. Support for the following Marvell MV78xx0 series SoCs:
  450. MV781x0, MV782x0.
  451. config ARCH_ORION5X
  452. bool "Marvell Orion"
  453. depends on MMU
  454. select CPU_FEROCEON
  455. select PCI
  456. select ARCH_REQUIRE_GPIOLIB
  457. select GENERIC_CLOCKEVENTS
  458. select PLAT_ORION
  459. help
  460. Support for the following Marvell Orion 5x series SoCs:
  461. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  462. Orion-2 (5281), Orion-1-90 (6183).
  463. config ARCH_MMP
  464. bool "Marvell PXA168/910/MMP2"
  465. depends on MMU
  466. select ARCH_REQUIRE_GPIOLIB
  467. select CLKDEV_LOOKUP
  468. select GENERIC_CLOCKEVENTS
  469. select HAVE_SCHED_CLOCK
  470. select TICK_ONESHOT
  471. select PLAT_PXA
  472. select SPARSE_IRQ
  473. help
  474. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  475. config ARCH_KS8695
  476. bool "Micrel/Kendin KS8695"
  477. select CPU_ARM922T
  478. select ARCH_REQUIRE_GPIOLIB
  479. select ARCH_USES_GETTIMEOFFSET
  480. help
  481. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  482. System-on-Chip devices.
  483. config ARCH_NS9XXX
  484. bool "NetSilicon NS9xxx"
  485. select CPU_ARM926T
  486. select GENERIC_GPIO
  487. select GENERIC_CLOCKEVENTS
  488. select HAVE_CLK
  489. help
  490. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  491. System.
  492. <http://www.digi.com/products/microprocessors/index.jsp>
  493. config ARCH_W90X900
  494. bool "Nuvoton W90X900 CPU"
  495. select CPU_ARM926T
  496. select ARCH_REQUIRE_GPIOLIB
  497. select CLKDEV_LOOKUP
  498. select CLKSRC_MMIO
  499. select GENERIC_CLOCKEVENTS
  500. help
  501. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  502. At present, the w90x900 has been renamed nuc900, regarding
  503. the ARM series product line, you can login the following
  504. link address to know more.
  505. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  506. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  507. config ARCH_NUC93X
  508. bool "Nuvoton NUC93X CPU"
  509. select CPU_ARM926T
  510. select CLKDEV_LOOKUP
  511. help
  512. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  513. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  514. config ARCH_TEGRA
  515. bool "NVIDIA Tegra"
  516. select CLKDEV_LOOKUP
  517. select CLKSRC_MMIO
  518. select GENERIC_TIME
  519. select GENERIC_CLOCKEVENTS
  520. select GENERIC_GPIO
  521. select HAVE_CLK
  522. select HAVE_SCHED_CLOCK
  523. select ARCH_HAS_BARRIERS if CACHE_L2X0
  524. select ARCH_HAS_CPUFREQ
  525. help
  526. This enables support for NVIDIA Tegra based systems (Tegra APX,
  527. Tegra 6xx and Tegra 2 series).
  528. config ARCH_PNX4008
  529. bool "Philips Nexperia PNX4008 Mobile"
  530. select CPU_ARM926T
  531. select CLKDEV_LOOKUP
  532. select ARCH_USES_GETTIMEOFFSET
  533. help
  534. This enables support for Philips PNX4008 mobile platform.
  535. config ARCH_PXA
  536. bool "PXA2xx/PXA3xx-based"
  537. depends on MMU
  538. select ARCH_MTD_XIP
  539. select ARCH_HAS_CPUFREQ
  540. select CLKDEV_LOOKUP
  541. select CLKSRC_MMIO
  542. select ARCH_REQUIRE_GPIOLIB
  543. select GENERIC_CLOCKEVENTS
  544. select HAVE_SCHED_CLOCK
  545. select TICK_ONESHOT
  546. select PLAT_PXA
  547. select SPARSE_IRQ
  548. help
  549. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  550. config ARCH_MSM
  551. bool "Qualcomm MSM"
  552. select HAVE_CLK
  553. select GENERIC_CLOCKEVENTS
  554. select ARCH_REQUIRE_GPIOLIB
  555. select CLKDEV_LOOKUP
  556. help
  557. Support for Qualcomm MSM/QSD based systems. This runs on the
  558. apps processor of the MSM/QSD and depends on a shared memory
  559. interface to the modem processor which runs the baseband
  560. stack and controls some vital subsystems
  561. (clock and power control, etc).
  562. config ARCH_SHMOBILE
  563. bool "Renesas SH-Mobile / R-Mobile"
  564. select HAVE_CLK
  565. select CLKDEV_LOOKUP
  566. select GENERIC_CLOCKEVENTS
  567. select NO_IOPORT
  568. select SPARSE_IRQ
  569. select MULTI_IRQ_HANDLER
  570. help
  571. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  572. config ARCH_RPC
  573. bool "RiscPC"
  574. select ARCH_ACORN
  575. select FIQ
  576. select TIMER_ACORN
  577. select ARCH_MAY_HAVE_PC_FDC
  578. select HAVE_PATA_PLATFORM
  579. select ISA_DMA_API
  580. select NO_IOPORT
  581. select ARCH_SPARSEMEM_ENABLE
  582. select ARCH_USES_GETTIMEOFFSET
  583. help
  584. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  585. CD-ROM interface, serial and parallel port, and the floppy drive.
  586. config ARCH_SA1100
  587. bool "SA1100-based"
  588. select CLKSRC_MMIO
  589. select CPU_SA1100
  590. select ISA
  591. select ARCH_SPARSEMEM_ENABLE
  592. select ARCH_MTD_XIP
  593. select ARCH_HAS_CPUFREQ
  594. select CPU_FREQ
  595. select GENERIC_CLOCKEVENTS
  596. select HAVE_CLK
  597. select HAVE_SCHED_CLOCK
  598. select TICK_ONESHOT
  599. select ARCH_REQUIRE_GPIOLIB
  600. help
  601. Support for StrongARM 11x0 based boards.
  602. config ARCH_S3C2410
  603. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  604. select GENERIC_GPIO
  605. select ARCH_HAS_CPUFREQ
  606. select HAVE_CLK
  607. select ARCH_USES_GETTIMEOFFSET
  608. select HAVE_S3C2410_I2C if I2C
  609. help
  610. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  611. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  612. the Samsung SMDK2410 development board (and derivatives).
  613. Note, the S3C2416 and the S3C2450 are so close that they even share
  614. the same SoC ID code. This means that there is no separate machine
  615. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  616. config ARCH_S3C64XX
  617. bool "Samsung S3C64XX"
  618. select PLAT_SAMSUNG
  619. select CPU_V6
  620. select ARM_VIC
  621. select HAVE_CLK
  622. select NO_IOPORT
  623. select ARCH_USES_GETTIMEOFFSET
  624. select ARCH_HAS_CPUFREQ
  625. select ARCH_REQUIRE_GPIOLIB
  626. select SAMSUNG_CLKSRC
  627. select SAMSUNG_IRQ_VIC_TIMER
  628. select SAMSUNG_IRQ_UART
  629. select S3C_GPIO_TRACK
  630. select S3C_GPIO_PULL_UPDOWN
  631. select S3C_GPIO_CFG_S3C24XX
  632. select S3C_GPIO_CFG_S3C64XX
  633. select S3C_DEV_NAND
  634. select USB_ARCH_HAS_OHCI
  635. select SAMSUNG_GPIOLIB_4BIT
  636. select HAVE_S3C2410_I2C if I2C
  637. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  638. help
  639. Samsung S3C64XX series based systems
  640. config ARCH_S5P64X0
  641. bool "Samsung S5P6440 S5P6450"
  642. select CPU_V6
  643. select GENERIC_GPIO
  644. select HAVE_CLK
  645. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  646. select GENERIC_CLOCKEVENTS
  647. select HAVE_SCHED_CLOCK
  648. select HAVE_S3C2410_I2C if I2C
  649. select HAVE_S3C_RTC if RTC_CLASS
  650. help
  651. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  652. SMDK6450.
  653. config ARCH_S5P6442
  654. bool "Samsung S5P6442"
  655. select CPU_V6
  656. select GENERIC_GPIO
  657. select HAVE_CLK
  658. select ARCH_USES_GETTIMEOFFSET
  659. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  660. help
  661. Samsung S5P6442 CPU based systems
  662. config ARCH_S5PC100
  663. bool "Samsung S5PC100"
  664. select GENERIC_GPIO
  665. select HAVE_CLK
  666. select CPU_V7
  667. select ARM_L1_CACHE_SHIFT_6
  668. select ARCH_USES_GETTIMEOFFSET
  669. select HAVE_S3C2410_I2C if I2C
  670. select HAVE_S3C_RTC if RTC_CLASS
  671. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  672. help
  673. Samsung S5PC100 series based systems
  674. config ARCH_S5PV210
  675. bool "Samsung S5PV210/S5PC110"
  676. select CPU_V7
  677. select ARCH_SPARSEMEM_ENABLE
  678. select GENERIC_GPIO
  679. select HAVE_CLK
  680. select ARM_L1_CACHE_SHIFT_6
  681. select ARCH_HAS_CPUFREQ
  682. select GENERIC_CLOCKEVENTS
  683. select HAVE_SCHED_CLOCK
  684. select HAVE_S3C2410_I2C if I2C
  685. select HAVE_S3C_RTC if RTC_CLASS
  686. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  687. help
  688. Samsung S5PV210/S5PC110 series based systems
  689. config ARCH_EXYNOS4
  690. bool "Samsung EXYNOS4"
  691. select CPU_V7
  692. select ARCH_SPARSEMEM_ENABLE
  693. select GENERIC_GPIO
  694. select HAVE_CLK
  695. select ARCH_HAS_CPUFREQ
  696. select GENERIC_CLOCKEVENTS
  697. select HAVE_S3C_RTC if RTC_CLASS
  698. select HAVE_S3C2410_I2C if I2C
  699. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  700. help
  701. Samsung EXYNOS4 series based systems
  702. config ARCH_SHARK
  703. bool "Shark"
  704. select CPU_SA110
  705. select ISA
  706. select ISA_DMA
  707. select ZONE_DMA
  708. select PCI
  709. select ARCH_USES_GETTIMEOFFSET
  710. help
  711. Support for the StrongARM based Digital DNARD machine, also known
  712. as "Shark" (<http://www.shark-linux.de/shark.html>).
  713. config ARCH_TCC_926
  714. bool "Telechips TCC ARM926-based systems"
  715. select CLKSRC_MMIO
  716. select CPU_ARM926T
  717. select HAVE_CLK
  718. select CLKDEV_LOOKUP
  719. select GENERIC_CLOCKEVENTS
  720. help
  721. Support for Telechips TCC ARM926-based systems.
  722. config ARCH_U300
  723. bool "ST-Ericsson U300 Series"
  724. depends on MMU
  725. select CLKSRC_MMIO
  726. select CPU_ARM926T
  727. select HAVE_SCHED_CLOCK
  728. select HAVE_TCM
  729. select ARM_AMBA
  730. select ARM_VIC
  731. select GENERIC_CLOCKEVENTS
  732. select CLKDEV_LOOKUP
  733. select GENERIC_GPIO
  734. help
  735. Support for ST-Ericsson U300 series mobile platforms.
  736. config ARCH_U8500
  737. bool "ST-Ericsson U8500 Series"
  738. select CPU_V7
  739. select ARM_AMBA
  740. select GENERIC_CLOCKEVENTS
  741. select CLKDEV_LOOKUP
  742. select ARCH_REQUIRE_GPIOLIB
  743. select ARCH_HAS_CPUFREQ
  744. help
  745. Support for ST-Ericsson's Ux500 architecture
  746. config ARCH_NOMADIK
  747. bool "STMicroelectronics Nomadik"
  748. select ARM_AMBA
  749. select ARM_VIC
  750. select CPU_ARM926T
  751. select CLKDEV_LOOKUP
  752. select GENERIC_CLOCKEVENTS
  753. select ARCH_REQUIRE_GPIOLIB
  754. help
  755. Support for the Nomadik platform by ST-Ericsson
  756. config ARCH_DAVINCI
  757. bool "TI DaVinci"
  758. select GENERIC_CLOCKEVENTS
  759. select ARCH_REQUIRE_GPIOLIB
  760. select ZONE_DMA
  761. select HAVE_IDE
  762. select CLKDEV_LOOKUP
  763. select GENERIC_ALLOCATOR
  764. select ARCH_HAS_HOLES_MEMORYMODEL
  765. help
  766. Support for TI's DaVinci platform.
  767. config ARCH_OMAP
  768. bool "TI OMAP"
  769. select HAVE_CLK
  770. select ARCH_REQUIRE_GPIOLIB
  771. select ARCH_HAS_CPUFREQ
  772. select GENERIC_CLOCKEVENTS
  773. select HAVE_SCHED_CLOCK
  774. select ARCH_HAS_HOLES_MEMORYMODEL
  775. help
  776. Support for TI's OMAP platform (OMAP1/2/3/4).
  777. config PLAT_SPEAR
  778. bool "ST SPEAr"
  779. select ARM_AMBA
  780. select ARCH_REQUIRE_GPIOLIB
  781. select CLKDEV_LOOKUP
  782. select CLKSRC_MMIO
  783. select GENERIC_CLOCKEVENTS
  784. select HAVE_CLK
  785. help
  786. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  787. config ARCH_VT8500
  788. bool "VIA/WonderMedia 85xx"
  789. select CPU_ARM926T
  790. select GENERIC_GPIO
  791. select ARCH_HAS_CPUFREQ
  792. select GENERIC_CLOCKEVENTS
  793. select ARCH_REQUIRE_GPIOLIB
  794. select HAVE_PWM
  795. help
  796. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  797. endchoice
  798. #
  799. # This is sorted alphabetically by mach-* pathname. However, plat-*
  800. # Kconfigs may be included either alphabetically (according to the
  801. # plat- suffix) or along side the corresponding mach-* source.
  802. #
  803. source "arch/arm/mach-at91/Kconfig"
  804. source "arch/arm/mach-bcmring/Kconfig"
  805. source "arch/arm/mach-clps711x/Kconfig"
  806. source "arch/arm/mach-cns3xxx/Kconfig"
  807. source "arch/arm/mach-davinci/Kconfig"
  808. source "arch/arm/mach-dove/Kconfig"
  809. source "arch/arm/mach-ep93xx/Kconfig"
  810. source "arch/arm/mach-footbridge/Kconfig"
  811. source "arch/arm/mach-gemini/Kconfig"
  812. source "arch/arm/mach-h720x/Kconfig"
  813. source "arch/arm/mach-integrator/Kconfig"
  814. source "arch/arm/mach-iop32x/Kconfig"
  815. source "arch/arm/mach-iop33x/Kconfig"
  816. source "arch/arm/mach-iop13xx/Kconfig"
  817. source "arch/arm/mach-ixp4xx/Kconfig"
  818. source "arch/arm/mach-ixp2000/Kconfig"
  819. source "arch/arm/mach-ixp23xx/Kconfig"
  820. source "arch/arm/mach-kirkwood/Kconfig"
  821. source "arch/arm/mach-ks8695/Kconfig"
  822. source "arch/arm/mach-loki/Kconfig"
  823. source "arch/arm/mach-lpc32xx/Kconfig"
  824. source "arch/arm/mach-msm/Kconfig"
  825. source "arch/arm/mach-mv78xx0/Kconfig"
  826. source "arch/arm/plat-mxc/Kconfig"
  827. source "arch/arm/mach-mxs/Kconfig"
  828. source "arch/arm/mach-netx/Kconfig"
  829. source "arch/arm/mach-nomadik/Kconfig"
  830. source "arch/arm/plat-nomadik/Kconfig"
  831. source "arch/arm/mach-ns9xxx/Kconfig"
  832. source "arch/arm/mach-nuc93x/Kconfig"
  833. source "arch/arm/plat-omap/Kconfig"
  834. source "arch/arm/mach-omap1/Kconfig"
  835. source "arch/arm/mach-omap2/Kconfig"
  836. source "arch/arm/mach-orion5x/Kconfig"
  837. source "arch/arm/mach-pxa/Kconfig"
  838. source "arch/arm/plat-pxa/Kconfig"
  839. source "arch/arm/mach-mmp/Kconfig"
  840. source "arch/arm/mach-realview/Kconfig"
  841. source "arch/arm/mach-sa1100/Kconfig"
  842. source "arch/arm/plat-samsung/Kconfig"
  843. source "arch/arm/plat-s3c24xx/Kconfig"
  844. source "arch/arm/plat-s5p/Kconfig"
  845. source "arch/arm/plat-spear/Kconfig"
  846. source "arch/arm/plat-tcc/Kconfig"
  847. if ARCH_S3C2410
  848. source "arch/arm/mach-s3c2400/Kconfig"
  849. source "arch/arm/mach-s3c2410/Kconfig"
  850. source "arch/arm/mach-s3c2412/Kconfig"
  851. source "arch/arm/mach-s3c2416/Kconfig"
  852. source "arch/arm/mach-s3c2440/Kconfig"
  853. source "arch/arm/mach-s3c2443/Kconfig"
  854. endif
  855. if ARCH_S3C64XX
  856. source "arch/arm/mach-s3c64xx/Kconfig"
  857. endif
  858. source "arch/arm/mach-s5p64x0/Kconfig"
  859. source "arch/arm/mach-s5p6442/Kconfig"
  860. source "arch/arm/mach-s5pc100/Kconfig"
  861. source "arch/arm/mach-s5pv210/Kconfig"
  862. source "arch/arm/mach-exynos4/Kconfig"
  863. source "arch/arm/mach-shmobile/Kconfig"
  864. source "arch/arm/plat-stmp3xxx/Kconfig"
  865. source "arch/arm/mach-tegra/Kconfig"
  866. source "arch/arm/mach-u300/Kconfig"
  867. source "arch/arm/mach-ux500/Kconfig"
  868. source "arch/arm/mach-versatile/Kconfig"
  869. source "arch/arm/mach-vexpress/Kconfig"
  870. source "arch/arm/plat-versatile/Kconfig"
  871. source "arch/arm/mach-vt8500/Kconfig"
  872. source "arch/arm/mach-w90x900/Kconfig"
  873. # Definitions to make life easier
  874. config ARCH_ACORN
  875. bool
  876. config PLAT_IOP
  877. bool
  878. select GENERIC_CLOCKEVENTS
  879. select HAVE_SCHED_CLOCK
  880. config PLAT_ORION
  881. bool
  882. select CLKSRC_MMIO
  883. select HAVE_SCHED_CLOCK
  884. config PLAT_PXA
  885. bool
  886. config PLAT_VERSATILE
  887. bool
  888. config ARM_TIMER_SP804
  889. bool
  890. select CLKSRC_MMIO
  891. source arch/arm/mm/Kconfig
  892. config IWMMXT
  893. bool "Enable iWMMXt support"
  894. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  895. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  896. help
  897. Enable support for iWMMXt context switching at run time if
  898. running on a CPU that supports it.
  899. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  900. config XSCALE_PMU
  901. bool
  902. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  903. default y
  904. config CPU_HAS_PMU
  905. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  906. (!ARCH_OMAP3 || OMAP3_EMU)
  907. default y
  908. bool
  909. config MULTI_IRQ_HANDLER
  910. bool
  911. help
  912. Allow each machine to specify it's own IRQ handler at run time.
  913. if !MMU
  914. source "arch/arm/Kconfig-nommu"
  915. endif
  916. config ARM_ERRATA_411920
  917. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  918. depends on CPU_V6 || CPU_V6K
  919. help
  920. Invalidation of the Instruction Cache operation can
  921. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  922. It does not affect the MPCore. This option enables the ARM Ltd.
  923. recommended workaround.
  924. config ARM_ERRATA_430973
  925. bool "ARM errata: Stale prediction on replaced interworking branch"
  926. depends on CPU_V7
  927. help
  928. This option enables the workaround for the 430973 Cortex-A8
  929. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  930. interworking branch is replaced with another code sequence at the
  931. same virtual address, whether due to self-modifying code or virtual
  932. to physical address re-mapping, Cortex-A8 does not recover from the
  933. stale interworking branch prediction. This results in Cortex-A8
  934. executing the new code sequence in the incorrect ARM or Thumb state.
  935. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  936. and also flushes the branch target cache at every context switch.
  937. Note that setting specific bits in the ACTLR register may not be
  938. available in non-secure mode.
  939. config ARM_ERRATA_458693
  940. bool "ARM errata: Processor deadlock when a false hazard is created"
  941. depends on CPU_V7
  942. help
  943. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  944. erratum. For very specific sequences of memory operations, it is
  945. possible for a hazard condition intended for a cache line to instead
  946. be incorrectly associated with a different cache line. This false
  947. hazard might then cause a processor deadlock. The workaround enables
  948. the L1 caching of the NEON accesses and disables the PLD instruction
  949. in the ACTLR register. Note that setting specific bits in the ACTLR
  950. register may not be available in non-secure mode.
  951. config ARM_ERRATA_460075
  952. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  953. depends on CPU_V7
  954. help
  955. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  956. erratum. Any asynchronous access to the L2 cache may encounter a
  957. situation in which recent store transactions to the L2 cache are lost
  958. and overwritten with stale memory contents from external memory. The
  959. workaround disables the write-allocate mode for the L2 cache via the
  960. ACTLR register. Note that setting specific bits in the ACTLR register
  961. may not be available in non-secure mode.
  962. config ARM_ERRATA_742230
  963. bool "ARM errata: DMB operation may be faulty"
  964. depends on CPU_V7 && SMP
  965. help
  966. This option enables the workaround for the 742230 Cortex-A9
  967. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  968. between two write operations may not ensure the correct visibility
  969. ordering of the two writes. This workaround sets a specific bit in
  970. the diagnostic register of the Cortex-A9 which causes the DMB
  971. instruction to behave as a DSB, ensuring the correct behaviour of
  972. the two writes.
  973. config ARM_ERRATA_742231
  974. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  975. depends on CPU_V7 && SMP
  976. help
  977. This option enables the workaround for the 742231 Cortex-A9
  978. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  979. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  980. accessing some data located in the same cache line, may get corrupted
  981. data due to bad handling of the address hazard when the line gets
  982. replaced from one of the CPUs at the same time as another CPU is
  983. accessing it. This workaround sets specific bits in the diagnostic
  984. register of the Cortex-A9 which reduces the linefill issuing
  985. capabilities of the processor.
  986. config PL310_ERRATA_588369
  987. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  988. depends on CACHE_L2X0
  989. help
  990. The PL310 L2 cache controller implements three types of Clean &
  991. Invalidate maintenance operations: by Physical Address
  992. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  993. They are architecturally defined to behave as the execution of a
  994. clean operation followed immediately by an invalidate operation,
  995. both performing to the same memory location. This functionality
  996. is not correctly implemented in PL310 as clean lines are not
  997. invalidated as a result of these operations.
  998. config ARM_ERRATA_720789
  999. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1000. depends on CPU_V7 && SMP
  1001. help
  1002. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1003. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1004. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1005. As a consequence of this erratum, some TLB entries which should be
  1006. invalidated are not, resulting in an incoherency in the system page
  1007. tables. The workaround changes the TLB flushing routines to invalidate
  1008. entries regardless of the ASID.
  1009. config PL310_ERRATA_727915
  1010. bool "Background Clean & Invalidate by Way operation can cause data corruption"
  1011. depends on CACHE_L2X0
  1012. help
  1013. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1014. operation (offset 0x7FC). This operation runs in background so that
  1015. PL310 can handle normal accesses while it is in progress. Under very
  1016. rare circumstances, due to this erratum, write data can be lost when
  1017. PL310 treats a cacheable write transaction during a Clean &
  1018. Invalidate by Way operation.
  1019. config ARM_ERRATA_743622
  1020. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1021. depends on CPU_V7
  1022. help
  1023. This option enables the workaround for the 743622 Cortex-A9
  1024. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1025. optimisation in the Cortex-A9 Store Buffer may lead to data
  1026. corruption. This workaround sets a specific bit in the diagnostic
  1027. register of the Cortex-A9 which disables the Store Buffer
  1028. optimisation, preventing the defect from occurring. This has no
  1029. visible impact on the overall performance or power consumption of the
  1030. processor.
  1031. config ARM_ERRATA_751472
  1032. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1033. depends on CPU_V7 && SMP
  1034. help
  1035. This option enables the workaround for the 751472 Cortex-A9 (prior
  1036. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1037. completion of a following broadcasted operation if the second
  1038. operation is received by a CPU before the ICIALLUIS has completed,
  1039. potentially leading to corrupted entries in the cache or TLB.
  1040. config ARM_ERRATA_753970
  1041. bool "ARM errata: cache sync operation may be faulty"
  1042. depends on CACHE_PL310
  1043. help
  1044. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1045. Under some condition the effect of cache sync operation on
  1046. the store buffer still remains when the operation completes.
  1047. This means that the store buffer is always asked to drain and
  1048. this prevents it from merging any further writes. The workaround
  1049. is to replace the normal offset of cache sync operation (0x730)
  1050. by another offset targeting an unmapped PL310 register 0x740.
  1051. This has the same effect as the cache sync operation: store buffer
  1052. drain and waiting for all buffers empty.
  1053. config ARM_ERRATA_754322
  1054. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1055. depends on CPU_V7
  1056. help
  1057. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1058. r3p*) erratum. A speculative memory access may cause a page table walk
  1059. which starts prior to an ASID switch but completes afterwards. This
  1060. can populate the micro-TLB with a stale entry which may be hit with
  1061. the new ASID. This workaround places two dsb instructions in the mm
  1062. switching code so that no page table walks can cross the ASID switch.
  1063. config ARM_ERRATA_754327
  1064. bool "ARM errata: no automatic Store Buffer drain"
  1065. depends on CPU_V7 && SMP
  1066. help
  1067. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1068. r2p0) erratum. The Store Buffer does not have any automatic draining
  1069. mechanism and therefore a livelock may occur if an external agent
  1070. continuously polls a memory location waiting to observe an update.
  1071. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1072. written polling loops from denying visibility of updates to memory.
  1073. endmenu
  1074. source "arch/arm/common/Kconfig"
  1075. menu "Bus support"
  1076. config ARM_AMBA
  1077. bool
  1078. config ISA
  1079. bool
  1080. help
  1081. Find out whether you have ISA slots on your motherboard. ISA is the
  1082. name of a bus system, i.e. the way the CPU talks to the other stuff
  1083. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1084. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1085. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1086. # Select ISA DMA controller support
  1087. config ISA_DMA
  1088. bool
  1089. select ISA_DMA_API
  1090. # Select ISA DMA interface
  1091. config ISA_DMA_API
  1092. bool
  1093. config PCI
  1094. bool "PCI support" if MIGHT_HAVE_PCI
  1095. help
  1096. Find out whether you have a PCI motherboard. PCI is the name of a
  1097. bus system, i.e. the way the CPU talks to the other stuff inside
  1098. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1099. VESA. If you have PCI, say Y, otherwise N.
  1100. config PCI_DOMAINS
  1101. bool
  1102. depends on PCI
  1103. config PCI_NANOENGINE
  1104. bool "BSE nanoEngine PCI support"
  1105. depends on SA1100_NANOENGINE
  1106. help
  1107. Enable PCI on the BSE nanoEngine board.
  1108. config PCI_SYSCALL
  1109. def_bool PCI
  1110. # Select the host bridge type
  1111. config PCI_HOST_VIA82C505
  1112. bool
  1113. depends on PCI && ARCH_SHARK
  1114. default y
  1115. config PCI_HOST_ITE8152
  1116. bool
  1117. depends on PCI && MACH_ARMCORE
  1118. default y
  1119. select DMABOUNCE
  1120. source "drivers/pci/Kconfig"
  1121. source "drivers/pcmcia/Kconfig"
  1122. endmenu
  1123. menu "Kernel Features"
  1124. source "kernel/time/Kconfig"
  1125. config SMP
  1126. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  1127. depends on EXPERIMENTAL
  1128. depends on CPU_V6K || CPU_V7
  1129. depends on GENERIC_CLOCKEVENTS
  1130. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1131. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1132. ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
  1133. ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
  1134. select USE_GENERIC_SMP_HELPERS
  1135. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1136. help
  1137. This enables support for systems with more than one CPU. If you have
  1138. a system with only one CPU, like most personal computers, say N. If
  1139. you have a system with more than one CPU, say Y.
  1140. If you say N here, the kernel will run on single and multiprocessor
  1141. machines, but will use only one CPU of a multiprocessor machine. If
  1142. you say Y here, the kernel will run on many, but not all, single
  1143. processor machines. On a single processor machine, the kernel will
  1144. run faster if you say N here.
  1145. See also <file:Documentation/i386/IO-APIC.txt>,
  1146. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1147. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1148. If you don't know what to do here, say N.
  1149. config SMP_ON_UP
  1150. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1151. depends on EXPERIMENTAL
  1152. depends on SMP && !XIP_KERNEL
  1153. default y
  1154. help
  1155. SMP kernels contain instructions which fail on non-SMP processors.
  1156. Enabling this option allows the kernel to modify itself to make
  1157. these instructions safe. Disabling it allows about 1K of space
  1158. savings.
  1159. If you don't know what to do here, say Y.
  1160. config HAVE_ARM_SCU
  1161. bool
  1162. depends on SMP
  1163. help
  1164. This option enables support for the ARM system coherency unit
  1165. config HAVE_ARM_TWD
  1166. bool
  1167. depends on SMP
  1168. select TICK_ONESHOT
  1169. help
  1170. This options enables support for the ARM timer and watchdog unit
  1171. choice
  1172. prompt "Memory split"
  1173. default VMSPLIT_3G
  1174. help
  1175. Select the desired split between kernel and user memory.
  1176. If you are not absolutely sure what you are doing, leave this
  1177. option alone!
  1178. config VMSPLIT_3G
  1179. bool "3G/1G user/kernel split"
  1180. config VMSPLIT_2G
  1181. bool "2G/2G user/kernel split"
  1182. config VMSPLIT_1G
  1183. bool "1G/3G user/kernel split"
  1184. endchoice
  1185. config PAGE_OFFSET
  1186. hex
  1187. default 0x40000000 if VMSPLIT_1G
  1188. default 0x80000000 if VMSPLIT_2G
  1189. default 0xC0000000
  1190. config NR_CPUS
  1191. int "Maximum number of CPUs (2-32)"
  1192. range 2 32
  1193. depends on SMP
  1194. default "4"
  1195. config HOTPLUG_CPU
  1196. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1197. depends on SMP && HOTPLUG && EXPERIMENTAL
  1198. depends on !ARCH_MSM
  1199. help
  1200. Say Y here to experiment with turning CPUs off and on. CPUs
  1201. can be controlled through /sys/devices/system/cpu.
  1202. config LOCAL_TIMERS
  1203. bool "Use local timer interrupts"
  1204. depends on SMP
  1205. default y
  1206. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1207. help
  1208. Enable support for local timers on SMP platforms, rather then the
  1209. legacy IPI broadcast method. Local timers allows the system
  1210. accounting to be spread across the timer interval, preventing a
  1211. "thundering herd" at every timer tick.
  1212. source kernel/Kconfig.preempt
  1213. config HZ
  1214. int
  1215. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1216. ARCH_S5P6442 || ARCH_S5PV210 || ARCH_EXYNOS4
  1217. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1218. default AT91_TIMER_HZ if ARCH_AT91
  1219. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1220. default 100
  1221. config THUMB2_KERNEL
  1222. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1223. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1224. select AEABI
  1225. select ARM_ASM_UNIFIED
  1226. help
  1227. By enabling this option, the kernel will be compiled in
  1228. Thumb-2 mode. A compiler/assembler that understand the unified
  1229. ARM-Thumb syntax is needed.
  1230. If unsure, say N.
  1231. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1232. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1233. depends on THUMB2_KERNEL && MODULES
  1234. default y
  1235. help
  1236. Various binutils versions can resolve Thumb-2 branches to
  1237. locally-defined, preemptible global symbols as short-range "b.n"
  1238. branch instructions.
  1239. This is a problem, because there's no guarantee the final
  1240. destination of the symbol, or any candidate locations for a
  1241. trampoline, are within range of the branch. For this reason, the
  1242. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1243. relocation in modules at all, and it makes little sense to add
  1244. support.
  1245. The symptom is that the kernel fails with an "unsupported
  1246. relocation" error when loading some modules.
  1247. Until fixed tools are available, passing
  1248. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1249. code which hits this problem, at the cost of a bit of extra runtime
  1250. stack usage in some cases.
  1251. The problem is described in more detail at:
  1252. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1253. Only Thumb-2 kernels are affected.
  1254. Unless you are sure your tools don't have this problem, say Y.
  1255. config ARM_ASM_UNIFIED
  1256. bool
  1257. config AEABI
  1258. bool "Use the ARM EABI to compile the kernel"
  1259. help
  1260. This option allows for the kernel to be compiled using the latest
  1261. ARM ABI (aka EABI). This is only useful if you are using a user
  1262. space environment that is also compiled with EABI.
  1263. Since there are major incompatibilities between the legacy ABI and
  1264. EABI, especially with regard to structure member alignment, this
  1265. option also changes the kernel syscall calling convention to
  1266. disambiguate both ABIs and allow for backward compatibility support
  1267. (selected with CONFIG_OABI_COMPAT).
  1268. To use this you need GCC version 4.0.0 or later.
  1269. config OABI_COMPAT
  1270. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1271. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1272. default y
  1273. help
  1274. This option preserves the old syscall interface along with the
  1275. new (ARM EABI) one. It also provides a compatibility layer to
  1276. intercept syscalls that have structure arguments which layout
  1277. in memory differs between the legacy ABI and the new ARM EABI
  1278. (only for non "thumb" binaries). This option adds a tiny
  1279. overhead to all syscalls and produces a slightly larger kernel.
  1280. If you know you'll be using only pure EABI user space then you
  1281. can say N here. If this option is not selected and you attempt
  1282. to execute a legacy ABI binary then the result will be
  1283. UNPREDICTABLE (in fact it can be predicted that it won't work
  1284. at all). If in doubt say Y.
  1285. config ARCH_HAS_HOLES_MEMORYMODEL
  1286. bool
  1287. config ARCH_SPARSEMEM_ENABLE
  1288. bool
  1289. config ARCH_SPARSEMEM_DEFAULT
  1290. def_bool ARCH_SPARSEMEM_ENABLE
  1291. config ARCH_SELECT_MEMORY_MODEL
  1292. def_bool ARCH_SPARSEMEM_ENABLE
  1293. config HIGHMEM
  1294. bool "High Memory Support (EXPERIMENTAL)"
  1295. depends on MMU && EXPERIMENTAL
  1296. help
  1297. The address space of ARM processors is only 4 Gigabytes large
  1298. and it has to accommodate user address space, kernel address
  1299. space as well as some memory mapped IO. That means that, if you
  1300. have a large amount of physical memory and/or IO, not all of the
  1301. memory can be "permanently mapped" by the kernel. The physical
  1302. memory that is not permanently mapped is called "high memory".
  1303. Depending on the selected kernel/user memory split, minimum
  1304. vmalloc space and actual amount of RAM, you may not need this
  1305. option which should result in a slightly faster kernel.
  1306. If unsure, say n.
  1307. config HIGHPTE
  1308. bool "Allocate 2nd-level pagetables from highmem"
  1309. depends on HIGHMEM
  1310. config HW_PERF_EVENTS
  1311. bool "Enable hardware performance counter support for perf events"
  1312. depends on PERF_EVENTS && CPU_HAS_PMU
  1313. default y
  1314. help
  1315. Enable hardware performance counter support for perf events. If
  1316. disabled, perf events will use software events only.
  1317. source "mm/Kconfig"
  1318. config FORCE_MAX_ZONEORDER
  1319. int "Maximum zone order" if ARCH_SHMOBILE
  1320. range 11 64 if ARCH_SHMOBILE
  1321. default "9" if SA1111
  1322. default "11"
  1323. help
  1324. The kernel memory allocator divides physically contiguous memory
  1325. blocks into "zones", where each zone is a power of two number of
  1326. pages. This option selects the largest power of two that the kernel
  1327. keeps in the memory allocator. If you need to allocate very large
  1328. blocks of physically contiguous memory, then you may need to
  1329. increase this value.
  1330. This config option is actually maximum order plus one. For example,
  1331. a value of 11 means that the largest free memory block is 2^10 pages.
  1332. config LEDS
  1333. bool "Timer and CPU usage LEDs"
  1334. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1335. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1336. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1337. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1338. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1339. ARCH_AT91 || ARCH_DAVINCI || \
  1340. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1341. help
  1342. If you say Y here, the LEDs on your machine will be used
  1343. to provide useful information about your current system status.
  1344. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1345. be able to select which LEDs are active using the options below. If
  1346. you are compiling a kernel for the EBSA-110 or the LART however, the
  1347. red LED will simply flash regularly to indicate that the system is
  1348. still functional. It is safe to say Y here if you have a CATS
  1349. system, but the driver will do nothing.
  1350. config LEDS_TIMER
  1351. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1352. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1353. || MACH_OMAP_PERSEUS2
  1354. depends on LEDS
  1355. depends on !GENERIC_CLOCKEVENTS
  1356. default y if ARCH_EBSA110
  1357. help
  1358. If you say Y here, one of the system LEDs (the green one on the
  1359. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1360. will flash regularly to indicate that the system is still
  1361. operational. This is mainly useful to kernel hackers who are
  1362. debugging unstable kernels.
  1363. The LART uses the same LED for both Timer LED and CPU usage LED
  1364. functions. You may choose to use both, but the Timer LED function
  1365. will overrule the CPU usage LED.
  1366. config LEDS_CPU
  1367. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1368. !ARCH_OMAP) \
  1369. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1370. || MACH_OMAP_PERSEUS2
  1371. depends on LEDS
  1372. help
  1373. If you say Y here, the red LED will be used to give a good real
  1374. time indication of CPU usage, by lighting whenever the idle task
  1375. is not currently executing.
  1376. The LART uses the same LED for both Timer LED and CPU usage LED
  1377. functions. You may choose to use both, but the Timer LED function
  1378. will overrule the CPU usage LED.
  1379. config ALIGNMENT_TRAP
  1380. bool
  1381. depends on CPU_CP15_MMU
  1382. default y if !ARCH_EBSA110
  1383. select HAVE_PROC_CPU if PROC_FS
  1384. help
  1385. ARM processors cannot fetch/store information which is not
  1386. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1387. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1388. fetch/store instructions will be emulated in software if you say
  1389. here, which has a severe performance impact. This is necessary for
  1390. correct operation of some network protocols. With an IP-only
  1391. configuration it is safe to say N, otherwise say Y.
  1392. config UACCESS_WITH_MEMCPY
  1393. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1394. depends on MMU && EXPERIMENTAL
  1395. default y if CPU_FEROCEON
  1396. help
  1397. Implement faster copy_to_user and clear_user methods for CPU
  1398. cores where a 8-word STM instruction give significantly higher
  1399. memory write throughput than a sequence of individual 32bit stores.
  1400. A possible side effect is a slight increase in scheduling latency
  1401. between threads sharing the same address space if they invoke
  1402. such copy operations with large buffers.
  1403. However, if the CPU data cache is using a write-allocate mode,
  1404. this option is unlikely to provide any performance gain.
  1405. config SECCOMP
  1406. bool
  1407. prompt "Enable seccomp to safely compute untrusted bytecode"
  1408. ---help---
  1409. This kernel feature is useful for number crunching applications
  1410. that may need to compute untrusted bytecode during their
  1411. execution. By using pipes or other transports made available to
  1412. the process as file descriptors supporting the read/write
  1413. syscalls, it's possible to isolate those applications in
  1414. their own address space using seccomp. Once seccomp is
  1415. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1416. and the task is only allowed to execute a few safe syscalls
  1417. defined by each seccomp mode.
  1418. config CC_STACKPROTECTOR
  1419. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1420. depends on EXPERIMENTAL
  1421. help
  1422. This option turns on the -fstack-protector GCC feature. This
  1423. feature puts, at the beginning of functions, a canary value on
  1424. the stack just before the return address, and validates
  1425. the value just before actually returning. Stack based buffer
  1426. overflows (that need to overwrite this return address) now also
  1427. overwrite the canary, which gets detected and the attack is then
  1428. neutralized via a kernel panic.
  1429. This feature requires gcc version 4.2 or above.
  1430. config DEPRECATED_PARAM_STRUCT
  1431. bool "Provide old way to pass kernel parameters"
  1432. help
  1433. This was deprecated in 2001 and announced to live on for 5 years.
  1434. Some old boot loaders still use this way.
  1435. endmenu
  1436. menu "Boot options"
  1437. # Compressed boot loader in ROM. Yes, we really want to ask about
  1438. # TEXT and BSS so we preserve their values in the config files.
  1439. config ZBOOT_ROM_TEXT
  1440. hex "Compressed ROM boot loader base address"
  1441. default "0"
  1442. help
  1443. The physical address at which the ROM-able zImage is to be
  1444. placed in the target. Platforms which normally make use of
  1445. ROM-able zImage formats normally set this to a suitable
  1446. value in their defconfig file.
  1447. If ZBOOT_ROM is not enabled, this has no effect.
  1448. config ZBOOT_ROM_BSS
  1449. hex "Compressed ROM boot loader BSS address"
  1450. default "0"
  1451. help
  1452. The base address of an area of read/write memory in the target
  1453. for the ROM-able zImage which must be available while the
  1454. decompressor is running. It must be large enough to hold the
  1455. entire decompressed kernel plus an additional 128 KiB.
  1456. Platforms which normally make use of ROM-able zImage formats
  1457. normally set this to a suitable value in their defconfig file.
  1458. If ZBOOT_ROM is not enabled, this has no effect.
  1459. config ZBOOT_ROM
  1460. bool "Compressed boot loader in ROM/flash"
  1461. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1462. help
  1463. Say Y here if you intend to execute your compressed kernel image
  1464. (zImage) directly from ROM or flash. If unsure, say N.
  1465. config ZBOOT_ROM_MMCIF
  1466. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1467. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1468. help
  1469. Say Y here to include experimental MMCIF loading code in the
  1470. ROM-able zImage. With this enabled it is possible to write the
  1471. the ROM-able zImage kernel image to an MMC card and boot the
  1472. kernel straight from the reset vector. At reset the processor
  1473. Mask ROM will load the first part of the the ROM-able zImage
  1474. which in turn loads the rest the kernel image to RAM using the
  1475. MMCIF hardware block.
  1476. config CMDLINE
  1477. string "Default kernel command string"
  1478. default ""
  1479. help
  1480. On some architectures (EBSA110 and CATS), there is currently no way
  1481. for the boot loader to pass arguments to the kernel. For these
  1482. architectures, you should supply some command-line options at build
  1483. time by entering them here. As a minimum, you should specify the
  1484. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1485. config CMDLINE_FORCE
  1486. bool "Always use the default kernel command string"
  1487. depends on CMDLINE != ""
  1488. help
  1489. Always use the default kernel command string, even if the boot
  1490. loader passes other arguments to the kernel.
  1491. This is useful if you cannot or don't want to change the
  1492. command-line options your boot loader passes to the kernel.
  1493. If unsure, say N.
  1494. config XIP_KERNEL
  1495. bool "Kernel Execute-In-Place from ROM"
  1496. depends on !ZBOOT_ROM
  1497. help
  1498. Execute-In-Place allows the kernel to run from non-volatile storage
  1499. directly addressable by the CPU, such as NOR flash. This saves RAM
  1500. space since the text section of the kernel is not loaded from flash
  1501. to RAM. Read-write sections, such as the data section and stack,
  1502. are still copied to RAM. The XIP kernel is not compressed since
  1503. it has to run directly from flash, so it will take more space to
  1504. store it. The flash address used to link the kernel object files,
  1505. and for storing it, is configuration dependent. Therefore, if you
  1506. say Y here, you must know the proper physical address where to
  1507. store the kernel image depending on your own flash memory usage.
  1508. Also note that the make target becomes "make xipImage" rather than
  1509. "make zImage" or "make Image". The final kernel binary to put in
  1510. ROM memory will be arch/arm/boot/xipImage.
  1511. If unsure, say N.
  1512. config XIP_PHYS_ADDR
  1513. hex "XIP Kernel Physical Location"
  1514. depends on XIP_KERNEL
  1515. default "0x00080000"
  1516. help
  1517. This is the physical address in your flash memory the kernel will
  1518. be linked for and stored to. This address is dependent on your
  1519. own flash usage.
  1520. config KEXEC
  1521. bool "Kexec system call (EXPERIMENTAL)"
  1522. depends on EXPERIMENTAL
  1523. help
  1524. kexec is a system call that implements the ability to shutdown your
  1525. current kernel, and to start another kernel. It is like a reboot
  1526. but it is independent of the system firmware. And like a reboot
  1527. you can start any kernel with it, not just Linux.
  1528. It is an ongoing process to be certain the hardware in a machine
  1529. is properly shutdown, so do not be surprised if this code does not
  1530. initially work for you. It may help to enable device hotplugging
  1531. support.
  1532. config ATAGS_PROC
  1533. bool "Export atags in procfs"
  1534. depends on KEXEC
  1535. default y
  1536. help
  1537. Should the atags used to boot the kernel be exported in an "atags"
  1538. file in procfs. Useful with kexec.
  1539. config CRASH_DUMP
  1540. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1541. depends on EXPERIMENTAL
  1542. help
  1543. Generate crash dump after being started by kexec. This should
  1544. be normally only set in special crash dump kernels which are
  1545. loaded in the main kernel with kexec-tools into a specially
  1546. reserved region and then later executed after a crash by
  1547. kdump/kexec. The crash dump kernel must be compiled to a
  1548. memory address not used by the main kernel
  1549. For more details see Documentation/kdump/kdump.txt
  1550. config AUTO_ZRELADDR
  1551. bool "Auto calculation of the decompressed kernel image address"
  1552. depends on !ZBOOT_ROM && !ARCH_U300
  1553. help
  1554. ZRELADDR is the physical address where the decompressed kernel
  1555. image will be placed. If AUTO_ZRELADDR is selected, the address
  1556. will be determined at run-time by masking the current IP with
  1557. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1558. from start of memory.
  1559. endmenu
  1560. menu "CPU Power Management"
  1561. if ARCH_HAS_CPUFREQ
  1562. source "drivers/cpufreq/Kconfig"
  1563. config CPU_FREQ_IMX
  1564. tristate "CPUfreq driver for i.MX CPUs"
  1565. depends on ARCH_MXC && CPU_FREQ
  1566. help
  1567. This enables the CPUfreq driver for i.MX CPUs.
  1568. config CPU_FREQ_SA1100
  1569. bool
  1570. config CPU_FREQ_SA1110
  1571. bool
  1572. config CPU_FREQ_INTEGRATOR
  1573. tristate "CPUfreq driver for ARM Integrator CPUs"
  1574. depends on ARCH_INTEGRATOR && CPU_FREQ
  1575. default y
  1576. help
  1577. This enables the CPUfreq driver for ARM Integrator CPUs.
  1578. For details, take a look at <file:Documentation/cpu-freq>.
  1579. If in doubt, say Y.
  1580. config CPU_FREQ_PXA
  1581. bool
  1582. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1583. default y
  1584. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1585. config CPU_FREQ_S3C64XX
  1586. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1587. depends on CPU_FREQ && CPU_S3C6410
  1588. config CPU_FREQ_S3C
  1589. bool
  1590. help
  1591. Internal configuration node for common cpufreq on Samsung SoC
  1592. config CPU_FREQ_S3C24XX
  1593. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1594. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1595. select CPU_FREQ_S3C
  1596. help
  1597. This enables the CPUfreq driver for the Samsung S3C24XX family
  1598. of CPUs.
  1599. For details, take a look at <file:Documentation/cpu-freq>.
  1600. If in doubt, say N.
  1601. config CPU_FREQ_S3C24XX_PLL
  1602. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1603. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1604. help
  1605. Compile in support for changing the PLL frequency from the
  1606. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1607. after a frequency change, so by default it is not enabled.
  1608. This also means that the PLL tables for the selected CPU(s) will
  1609. be built which may increase the size of the kernel image.
  1610. config CPU_FREQ_S3C24XX_DEBUG
  1611. bool "Debug CPUfreq Samsung driver core"
  1612. depends on CPU_FREQ_S3C24XX
  1613. help
  1614. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1615. config CPU_FREQ_S3C24XX_IODEBUG
  1616. bool "Debug CPUfreq Samsung driver IO timing"
  1617. depends on CPU_FREQ_S3C24XX
  1618. help
  1619. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1620. config CPU_FREQ_S3C24XX_DEBUGFS
  1621. bool "Export debugfs for CPUFreq"
  1622. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1623. help
  1624. Export status information via debugfs.
  1625. endif
  1626. source "drivers/cpuidle/Kconfig"
  1627. endmenu
  1628. menu "Floating point emulation"
  1629. comment "At least one emulation must be selected"
  1630. config FPE_NWFPE
  1631. bool "NWFPE math emulation"
  1632. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1633. ---help---
  1634. Say Y to include the NWFPE floating point emulator in the kernel.
  1635. This is necessary to run most binaries. Linux does not currently
  1636. support floating point hardware so you need to say Y here even if
  1637. your machine has an FPA or floating point co-processor podule.
  1638. You may say N here if you are going to load the Acorn FPEmulator
  1639. early in the bootup.
  1640. config FPE_NWFPE_XP
  1641. bool "Support extended precision"
  1642. depends on FPE_NWFPE
  1643. help
  1644. Say Y to include 80-bit support in the kernel floating-point
  1645. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1646. Note that gcc does not generate 80-bit operations by default,
  1647. so in most cases this option only enlarges the size of the
  1648. floating point emulator without any good reason.
  1649. You almost surely want to say N here.
  1650. config FPE_FASTFPE
  1651. bool "FastFPE math emulation (EXPERIMENTAL)"
  1652. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1653. ---help---
  1654. Say Y here to include the FAST floating point emulator in the kernel.
  1655. This is an experimental much faster emulator which now also has full
  1656. precision for the mantissa. It does not support any exceptions.
  1657. It is very simple, and approximately 3-6 times faster than NWFPE.
  1658. It should be sufficient for most programs. It may be not suitable
  1659. for scientific calculations, but you have to check this for yourself.
  1660. If you do not feel you need a faster FP emulation you should better
  1661. choose NWFPE.
  1662. config VFP
  1663. bool "VFP-format floating point maths"
  1664. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1665. help
  1666. Say Y to include VFP support code in the kernel. This is needed
  1667. if your hardware includes a VFP unit.
  1668. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1669. release notes and additional status information.
  1670. Say N if your target does not have VFP hardware.
  1671. config VFPv3
  1672. bool
  1673. depends on VFP
  1674. default y if CPU_V7
  1675. config NEON
  1676. bool "Advanced SIMD (NEON) Extension support"
  1677. depends on VFPv3 && CPU_V7
  1678. help
  1679. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1680. Extension.
  1681. endmenu
  1682. menu "Userspace binary formats"
  1683. source "fs/Kconfig.binfmt"
  1684. config ARTHUR
  1685. tristate "RISC OS personality"
  1686. depends on !AEABI
  1687. help
  1688. Say Y here to include the kernel code necessary if you want to run
  1689. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1690. experimental; if this sounds frightening, say N and sleep in peace.
  1691. You can also say M here to compile this support as a module (which
  1692. will be called arthur).
  1693. endmenu
  1694. menu "Power management options"
  1695. source "kernel/power/Kconfig"
  1696. config ARCH_SUSPEND_POSSIBLE
  1697. depends on !ARCH_S5P64X0 && !ARCH_S5P6442
  1698. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1699. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1700. def_bool y
  1701. endmenu
  1702. source "net/Kconfig"
  1703. source "drivers/Kconfig"
  1704. source "fs/Kconfig"
  1705. source "arch/arm/Kconfig.debug"
  1706. source "security/Kconfig"
  1707. source "crypto/Kconfig"
  1708. source "lib/Kconfig"