Kconfig 58 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991001011021031041051061071081091101111121131141151161171181191201211221231241251261271281291301311321331341351361371381391401411421431441451461471481491501511521531541551561571581591601611621631641651661671681691701711721731741751761771781791801811821831841851861871881891901911921931941951961971981992002012022032042052062072082092102112122132142152162172182192202212222232242252262272282292302312322332342352362372382392402412422432442452462472482492502512522532542552562572582592602612622632642652662672682692702712722732742752762772782792802812822832842852862872882892902912922932942952962972982993003013023033043053063073083093103113123133143153163173183193203213223233243253263273283293303313323333343353363373383393403413423433443453463473483493503513523533543553563573583593603613623633643653663673683693703713723733743753763773783793803813823833843853863873883893903913923933943953963973983994004014024034044054064074084094104114124134144154164174184194204214224234244254264274284294304314324334344354364374384394404414424434444454464474484494504514524534544554564574584594604614624634644654664674684694704714724734744754764774784794804814824834844854864874884894904914924934944954964974984995005015025035045055065075085095105115125135145155165175185195205215225235245255265275285295305315325335345355365375385395405415425435445455465475485495505515525535545555565575585595605615625635645655665675685695705715725735745755765775785795805815825835845855865875885895905915925935945955965975985996006016026036046056066076086096106116126136146156166176186196206216226236246256266276286296306316326336346356366376386396406416426436446456466476486496506516526536546556566576586596606616626636646656666676686696706716726736746756766776786796806816826836846856866876886896906916926936946956966976986997007017027037047057067077087097107117127137147157167177187197207217227237247257267277287297307317327337347357367377387397407417427437447457467477487497507517527537547557567577587597607617627637647657667677687697707717727737747757767777787797807817827837847857867877887897907917927937947957967977987998008018028038048058068078088098108118128138148158168178188198208218228238248258268278288298308318328338348358368378388398408418428438448458468478488498508518528538548558568578588598608618628638648658668678688698708718728738748758768778788798808818828838848858868878888898908918928938948958968978988999009019029039049059069079089099109119129139149159169179189199209219229239249259269279289299309319329339349359369379389399409419429439449459469479489499509519529539549559569579589599609619629639649659669679689699709719729739749759769779789799809819829839849859869879889899909919929939949959969979989991000100110021003100410051006100710081009101010111012101310141015101610171018101910201021102210231024102510261027102810291030103110321033103410351036103710381039104010411042104310441045104610471048104910501051105210531054105510561057105810591060106110621063106410651066106710681069107010711072107310741075107610771078107910801081108210831084108510861087108810891090109110921093109410951096109710981099110011011102110311041105110611071108110911101111111211131114111511161117111811191120112111221123112411251126112711281129113011311132113311341135113611371138113911401141114211431144114511461147114811491150115111521153115411551156115711581159116011611162116311641165116611671168116911701171117211731174117511761177117811791180118111821183118411851186118711881189119011911192119311941195119611971198119912001201120212031204120512061207120812091210121112121213121412151216121712181219122012211222122312241225122612271228122912301231123212331234123512361237123812391240124112421243124412451246124712481249125012511252125312541255125612571258125912601261126212631264126512661267126812691270127112721273127412751276127712781279128012811282128312841285128612871288128912901291129212931294129512961297129812991300130113021303130413051306130713081309131013111312131313141315131613171318131913201321132213231324132513261327132813291330133113321333133413351336133713381339134013411342134313441345134613471348134913501351135213531354135513561357135813591360136113621363136413651366136713681369137013711372137313741375137613771378137913801381138213831384138513861387138813891390139113921393139413951396139713981399140014011402140314041405140614071408140914101411141214131414141514161417141814191420142114221423142414251426142714281429143014311432143314341435143614371438143914401441144214431444144514461447144814491450145114521453145414551456145714581459146014611462146314641465146614671468146914701471147214731474147514761477147814791480148114821483148414851486148714881489149014911492149314941495149614971498149915001501150215031504150515061507150815091510151115121513151415151516151715181519152015211522152315241525152615271528152915301531153215331534153515361537153815391540154115421543154415451546154715481549155015511552155315541555155615571558155915601561156215631564156515661567156815691570157115721573157415751576157715781579158015811582158315841585158615871588158915901591159215931594159515961597159815991600160116021603160416051606160716081609161016111612161316141615161616171618161916201621162216231624162516261627162816291630163116321633163416351636163716381639164016411642164316441645164616471648164916501651165216531654165516561657165816591660166116621663166416651666166716681669167016711672167316741675167616771678167916801681168216831684168516861687168816891690169116921693169416951696169716981699170017011702170317041705170617071708170917101711171217131714171517161717171817191720172117221723172417251726172717281729173017311732173317341735173617371738173917401741174217431744174517461747174817491750175117521753175417551756175717581759176017611762176317641765176617671768176917701771177217731774177517761777177817791780178117821783178417851786178717881789179017911792179317941795179617971798179918001801180218031804180518061807180818091810181118121813181418151816181718181819182018211822182318241825182618271828182918301831183218331834183518361837183818391840184118421843184418451846184718481849185018511852185318541855185618571858185918601861186218631864186518661867186818691870187118721873187418751876187718781879188018811882188318841885188618871888188918901891189218931894189518961897189818991900190119021903190419051906190719081909191019111912191319141915191619171918191919201921192219231924192519261927192819291930193119321933193419351936193719381939194019411942194319441945194619471948194919501951195219531954195519561957195819591960196119621963196419651966196719681969197019711972197319741975197619771978197919801981198219831984198519861987198819891990199119921993199419951996199719981999200020012002200320042005200620072008200920102011201220132014201520162017201820192020202120222023202420252026202720282029203020312032203320342035203620372038203920402041204220432044
  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 and virt-to-phys translation functions at
  160. boot and module load time according to the position of the
  161. kernel in system memory.
  162. This can only be used with non-XIP MMU kernels where the base
  163. of physical memory is at a 16MB boundary, or theoretically 64K
  164. for the MSM machine class.
  165. config ARM_PATCH_PHYS_VIRT_16BIT
  166. def_bool y
  167. depends on ARM_PATCH_PHYS_VIRT && ARCH_MSM
  168. help
  169. This option extends the physical to virtual translation patching
  170. to allow physical memory down to a theoretical minimum of 64K
  171. boundaries.
  172. source "init/Kconfig"
  173. source "kernel/Kconfig.freezer"
  174. menu "System Type"
  175. config MMU
  176. bool "MMU-based Paged Memory Management Support"
  177. default y
  178. help
  179. Select if you want MMU-based virtualised addressing space
  180. support by paged memory management. If unsure, say 'Y'.
  181. #
  182. # The "ARM system type" choice list is ordered alphabetically by option
  183. # text. Please add new entries in the option alphabetic order.
  184. #
  185. choice
  186. prompt "ARM system type"
  187. default ARCH_VERSATILE
  188. config ARCH_INTEGRATOR
  189. bool "ARM Ltd. Integrator family"
  190. select ARM_AMBA
  191. select ARCH_HAS_CPUFREQ
  192. select CLKDEV_LOOKUP
  193. select ICST
  194. select GENERIC_CLOCKEVENTS
  195. select PLAT_VERSATILE
  196. select PLAT_VERSATILE_FPGA_IRQ
  197. help
  198. Support for ARM's Integrator platform.
  199. config ARCH_REALVIEW
  200. bool "ARM Ltd. RealView family"
  201. select ARM_AMBA
  202. select CLKDEV_LOOKUP
  203. select ICST
  204. select GENERIC_CLOCKEVENTS
  205. select ARCH_WANT_OPTIONAL_GPIOLIB
  206. select PLAT_VERSATILE
  207. select PLAT_VERSATILE_CLCD
  208. select ARM_TIMER_SP804
  209. select GPIO_PL061 if GPIOLIB
  210. help
  211. This enables support for ARM Ltd RealView boards.
  212. config ARCH_VERSATILE
  213. bool "ARM Ltd. Versatile family"
  214. select ARM_AMBA
  215. select ARM_VIC
  216. select CLKDEV_LOOKUP
  217. select ICST
  218. select GENERIC_CLOCKEVENTS
  219. select ARCH_WANT_OPTIONAL_GPIOLIB
  220. select PLAT_VERSATILE
  221. select PLAT_VERSATILE_CLCD
  222. select PLAT_VERSATILE_FPGA_IRQ
  223. select ARM_TIMER_SP804
  224. help
  225. This enables support for ARM Ltd Versatile board.
  226. config ARCH_VEXPRESS
  227. bool "ARM Ltd. Versatile Express family"
  228. select ARCH_WANT_OPTIONAL_GPIOLIB
  229. select ARM_AMBA
  230. select ARM_TIMER_SP804
  231. select CLKDEV_LOOKUP
  232. select GENERIC_CLOCKEVENTS
  233. select HAVE_CLK
  234. select HAVE_PATA_PLATFORM
  235. select ICST
  236. select PLAT_VERSATILE
  237. select PLAT_VERSATILE_CLCD
  238. help
  239. This enables support for the ARM Ltd Versatile Express boards.
  240. config ARCH_AT91
  241. bool "Atmel AT91"
  242. select ARCH_REQUIRE_GPIOLIB
  243. select HAVE_CLK
  244. select CLKDEV_LOOKUP
  245. select ARM_PATCH_PHYS_VIRT if MMU
  246. help
  247. This enables support for systems based on the Atmel AT91RM9200,
  248. AT91SAM9 and AT91CAP9 processors.
  249. config ARCH_BCMRING
  250. bool "Broadcom BCMRING"
  251. depends on MMU
  252. select CPU_V6
  253. select ARM_AMBA
  254. select ARM_TIMER_SP804
  255. select CLKDEV_LOOKUP
  256. select GENERIC_CLOCKEVENTS
  257. select ARCH_WANT_OPTIONAL_GPIOLIB
  258. help
  259. Support for Broadcom's BCMRing platform.
  260. config ARCH_CLPS711X
  261. bool "Cirrus Logic CLPS711x/EP721x-based"
  262. select CPU_ARM720T
  263. select ARCH_USES_GETTIMEOFFSET
  264. help
  265. Support for Cirrus Logic 711x/721x based boards.
  266. config ARCH_CNS3XXX
  267. bool "Cavium Networks CNS3XXX family"
  268. select CPU_V6
  269. select GENERIC_CLOCKEVENTS
  270. select ARM_GIC
  271. select MIGHT_HAVE_PCI
  272. select PCI_DOMAINS if PCI
  273. help
  274. Support for Cavium Networks CNS3XXX platform.
  275. config ARCH_GEMINI
  276. bool "Cortina Systems Gemini"
  277. select CPU_FA526
  278. select ARCH_REQUIRE_GPIOLIB
  279. select ARCH_USES_GETTIMEOFFSET
  280. help
  281. Support for the Cortina Systems Gemini family SoCs
  282. config ARCH_EBSA110
  283. bool "EBSA-110"
  284. select CPU_SA110
  285. select ISA
  286. select NO_IOPORT
  287. select ARCH_USES_GETTIMEOFFSET
  288. help
  289. This is an evaluation board for the StrongARM processor available
  290. from Digital. It has limited hardware on-board, including an
  291. Ethernet interface, two PCMCIA sockets, two serial ports and a
  292. parallel port.
  293. config ARCH_EP93XX
  294. bool "EP93xx-based"
  295. select CPU_ARM920T
  296. select ARM_AMBA
  297. select ARM_VIC
  298. select CLKDEV_LOOKUP
  299. select ARCH_REQUIRE_GPIOLIB
  300. select ARCH_HAS_HOLES_MEMORYMODEL
  301. select ARCH_USES_GETTIMEOFFSET
  302. help
  303. This enables support for the Cirrus EP93xx series of CPUs.
  304. config ARCH_FOOTBRIDGE
  305. bool "FootBridge"
  306. select CPU_SA110
  307. select FOOTBRIDGE
  308. select GENERIC_CLOCKEVENTS
  309. help
  310. Support for systems based on the DC21285 companion chip
  311. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  312. config ARCH_MXC
  313. bool "Freescale MXC/iMX-based"
  314. select GENERIC_CLOCKEVENTS
  315. select ARCH_REQUIRE_GPIOLIB
  316. select CLKDEV_LOOKUP
  317. select CLKSRC_MMIO
  318. select HAVE_SCHED_CLOCK
  319. help
  320. Support for Freescale MXC/iMX-based family of processors
  321. config ARCH_MXS
  322. bool "Freescale MXS-based"
  323. select GENERIC_CLOCKEVENTS
  324. select ARCH_REQUIRE_GPIOLIB
  325. select CLKDEV_LOOKUP
  326. select CLKSRC_MMIO
  327. help
  328. Support for Freescale MXS-based family of processors
  329. config ARCH_NETX
  330. bool "Hilscher NetX based"
  331. select CLKSRC_MMIO
  332. select CPU_ARM926T
  333. select ARM_VIC
  334. select GENERIC_CLOCKEVENTS
  335. help
  336. This enables support for systems based on the Hilscher NetX Soc
  337. config ARCH_H720X
  338. bool "Hynix HMS720x-based"
  339. select CPU_ARM720T
  340. select ISA_DMA_API
  341. select ARCH_USES_GETTIMEOFFSET
  342. help
  343. This enables support for systems based on the Hynix HMS720x
  344. config ARCH_IOP13XX
  345. bool "IOP13xx-based"
  346. depends on MMU
  347. select CPU_XSC3
  348. select PLAT_IOP
  349. select PCI
  350. select ARCH_SUPPORTS_MSI
  351. select VMSPLIT_1G
  352. help
  353. Support for Intel's IOP13XX (XScale) family of processors.
  354. config ARCH_IOP32X
  355. bool "IOP32x-based"
  356. depends on MMU
  357. select CPU_XSCALE
  358. select PLAT_IOP
  359. select PCI
  360. select ARCH_REQUIRE_GPIOLIB
  361. help
  362. Support for Intel's 80219 and IOP32X (XScale) family of
  363. processors.
  364. config ARCH_IOP33X
  365. bool "IOP33x-based"
  366. depends on MMU
  367. select CPU_XSCALE
  368. select PLAT_IOP
  369. select PCI
  370. select ARCH_REQUIRE_GPIOLIB
  371. help
  372. Support for Intel's IOP33X (XScale) family of processors.
  373. config ARCH_IXP23XX
  374. bool "IXP23XX-based"
  375. depends on MMU
  376. select CPU_XSC3
  377. select PCI
  378. select ARCH_USES_GETTIMEOFFSET
  379. help
  380. Support for Intel's IXP23xx (XScale) family of processors.
  381. config ARCH_IXP2000
  382. bool "IXP2400/2800-based"
  383. depends on MMU
  384. select CPU_XSCALE
  385. select PCI
  386. select ARCH_USES_GETTIMEOFFSET
  387. help
  388. Support for Intel's IXP2400/2800 (XScale) family of processors.
  389. config ARCH_IXP4XX
  390. bool "IXP4xx-based"
  391. depends on MMU
  392. select CLKSRC_MMIO
  393. select CPU_XSCALE
  394. select GENERIC_GPIO
  395. select GENERIC_CLOCKEVENTS
  396. select HAVE_SCHED_CLOCK
  397. select MIGHT_HAVE_PCI
  398. select DMABOUNCE if PCI
  399. help
  400. Support for Intel's IXP4XX (XScale) family of processors.
  401. config ARCH_DOVE
  402. bool "Marvell Dove"
  403. select CPU_V7
  404. select PCI
  405. select ARCH_REQUIRE_GPIOLIB
  406. select GENERIC_CLOCKEVENTS
  407. select PLAT_ORION
  408. help
  409. Support for the Marvell Dove SoC 88AP510
  410. config ARCH_KIRKWOOD
  411. bool "Marvell Kirkwood"
  412. select CPU_FEROCEON
  413. select PCI
  414. select ARCH_REQUIRE_GPIOLIB
  415. select GENERIC_CLOCKEVENTS
  416. select PLAT_ORION
  417. help
  418. Support for the following Marvell Kirkwood series SoCs:
  419. 88F6180, 88F6192 and 88F6281.
  420. config ARCH_LOKI
  421. bool "Marvell Loki (88RC8480)"
  422. select CPU_FEROCEON
  423. select GENERIC_CLOCKEVENTS
  424. select PLAT_ORION
  425. help
  426. Support for the Marvell Loki (88RC8480) SoC.
  427. config ARCH_LPC32XX
  428. bool "NXP LPC32XX"
  429. select CLKSRC_MMIO
  430. select CPU_ARM926T
  431. select ARCH_REQUIRE_GPIOLIB
  432. select HAVE_IDE
  433. select ARM_AMBA
  434. select USB_ARCH_HAS_OHCI
  435. select CLKDEV_LOOKUP
  436. select GENERIC_TIME
  437. select GENERIC_CLOCKEVENTS
  438. help
  439. Support for the NXP LPC32XX family of processors
  440. config ARCH_MV78XX0
  441. bool "Marvell MV78xx0"
  442. select CPU_FEROCEON
  443. select PCI
  444. select ARCH_REQUIRE_GPIOLIB
  445. select GENERIC_CLOCKEVENTS
  446. select PLAT_ORION
  447. help
  448. Support for the following Marvell MV78xx0 series SoCs:
  449. MV781x0, MV782x0.
  450. config ARCH_ORION5X
  451. bool "Marvell Orion"
  452. depends on MMU
  453. select CPU_FEROCEON
  454. select PCI
  455. select ARCH_REQUIRE_GPIOLIB
  456. select GENERIC_CLOCKEVENTS
  457. select PLAT_ORION
  458. help
  459. Support for the following Marvell Orion 5x series SoCs:
  460. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  461. Orion-2 (5281), Orion-1-90 (6183).
  462. config ARCH_MMP
  463. bool "Marvell PXA168/910/MMP2"
  464. depends on MMU
  465. select ARCH_REQUIRE_GPIOLIB
  466. select CLKDEV_LOOKUP
  467. select GENERIC_CLOCKEVENTS
  468. select HAVE_SCHED_CLOCK
  469. select TICK_ONESHOT
  470. select PLAT_PXA
  471. select SPARSE_IRQ
  472. help
  473. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  474. config ARCH_KS8695
  475. bool "Micrel/Kendin KS8695"
  476. select CPU_ARM922T
  477. select ARCH_REQUIRE_GPIOLIB
  478. select ARCH_USES_GETTIMEOFFSET
  479. help
  480. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  481. System-on-Chip devices.
  482. config ARCH_W90X900
  483. bool "Nuvoton W90X900 CPU"
  484. select CPU_ARM926T
  485. select ARCH_REQUIRE_GPIOLIB
  486. select CLKDEV_LOOKUP
  487. select CLKSRC_MMIO
  488. select GENERIC_CLOCKEVENTS
  489. help
  490. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  491. At present, the w90x900 has been renamed nuc900, regarding
  492. the ARM series product line, you can login the following
  493. link address to know more.
  494. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  495. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  496. config ARCH_NUC93X
  497. bool "Nuvoton NUC93X CPU"
  498. select CPU_ARM926T
  499. select CLKDEV_LOOKUP
  500. help
  501. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  502. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  503. config ARCH_TEGRA
  504. bool "NVIDIA Tegra"
  505. select CLKDEV_LOOKUP
  506. select CLKSRC_MMIO
  507. select GENERIC_TIME
  508. select GENERIC_CLOCKEVENTS
  509. select GENERIC_GPIO
  510. select HAVE_CLK
  511. select HAVE_SCHED_CLOCK
  512. select ARCH_HAS_BARRIERS if CACHE_L2X0
  513. select ARCH_HAS_CPUFREQ
  514. help
  515. This enables support for NVIDIA Tegra based systems (Tegra APX,
  516. Tegra 6xx and Tegra 2 series).
  517. config ARCH_PNX4008
  518. bool "Philips Nexperia PNX4008 Mobile"
  519. select CPU_ARM926T
  520. select CLKDEV_LOOKUP
  521. select ARCH_USES_GETTIMEOFFSET
  522. help
  523. This enables support for Philips PNX4008 mobile platform.
  524. config ARCH_PXA
  525. bool "PXA2xx/PXA3xx-based"
  526. depends on MMU
  527. select ARCH_MTD_XIP
  528. select ARCH_HAS_CPUFREQ
  529. select CLKDEV_LOOKUP
  530. select CLKSRC_MMIO
  531. select ARCH_REQUIRE_GPIOLIB
  532. select GENERIC_CLOCKEVENTS
  533. select HAVE_SCHED_CLOCK
  534. select TICK_ONESHOT
  535. select PLAT_PXA
  536. select SPARSE_IRQ
  537. help
  538. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  539. config ARCH_MSM
  540. bool "Qualcomm MSM"
  541. select HAVE_CLK
  542. select GENERIC_CLOCKEVENTS
  543. select ARCH_REQUIRE_GPIOLIB
  544. select CLKDEV_LOOKUP
  545. help
  546. Support for Qualcomm MSM/QSD based systems. This runs on the
  547. apps processor of the MSM/QSD and depends on a shared memory
  548. interface to the modem processor which runs the baseband
  549. stack and controls some vital subsystems
  550. (clock and power control, etc).
  551. config ARCH_SHMOBILE
  552. bool "Renesas SH-Mobile / R-Mobile"
  553. select HAVE_CLK
  554. select CLKDEV_LOOKUP
  555. select GENERIC_CLOCKEVENTS
  556. select NO_IOPORT
  557. select SPARSE_IRQ
  558. select MULTI_IRQ_HANDLER
  559. help
  560. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  561. config ARCH_RPC
  562. bool "RiscPC"
  563. select ARCH_ACORN
  564. select FIQ
  565. select TIMER_ACORN
  566. select ARCH_MAY_HAVE_PC_FDC
  567. select HAVE_PATA_PLATFORM
  568. select ISA_DMA_API
  569. select NO_IOPORT
  570. select ARCH_SPARSEMEM_ENABLE
  571. select ARCH_USES_GETTIMEOFFSET
  572. help
  573. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  574. CD-ROM interface, serial and parallel port, and the floppy drive.
  575. config ARCH_SA1100
  576. bool "SA1100-based"
  577. select CLKSRC_MMIO
  578. select CPU_SA1100
  579. select ISA
  580. select ARCH_SPARSEMEM_ENABLE
  581. select ARCH_MTD_XIP
  582. select ARCH_HAS_CPUFREQ
  583. select CPU_FREQ
  584. select GENERIC_CLOCKEVENTS
  585. select HAVE_CLK
  586. select HAVE_SCHED_CLOCK
  587. select TICK_ONESHOT
  588. select ARCH_REQUIRE_GPIOLIB
  589. help
  590. Support for StrongARM 11x0 based boards.
  591. config ARCH_S3C2410
  592. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  593. select GENERIC_GPIO
  594. select ARCH_HAS_CPUFREQ
  595. select HAVE_CLK
  596. select CLKDEV_LOOKUP
  597. select ARCH_USES_GETTIMEOFFSET
  598. select HAVE_S3C2410_I2C if I2C
  599. help
  600. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  601. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  602. the Samsung SMDK2410 development board (and derivatives).
  603. Note, the S3C2416 and the S3C2450 are so close that they even share
  604. the same SoC ID code. This means that there is no separate machine
  605. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  606. config ARCH_S3C64XX
  607. bool "Samsung S3C64XX"
  608. select PLAT_SAMSUNG
  609. select CPU_V6
  610. select ARM_VIC
  611. select HAVE_CLK
  612. select CLKDEV_LOOKUP
  613. select NO_IOPORT
  614. select ARCH_USES_GETTIMEOFFSET
  615. select ARCH_HAS_CPUFREQ
  616. select ARCH_REQUIRE_GPIOLIB
  617. select SAMSUNG_CLKSRC
  618. select SAMSUNG_IRQ_VIC_TIMER
  619. select SAMSUNG_IRQ_UART
  620. select S3C_GPIO_TRACK
  621. select S3C_GPIO_PULL_UPDOWN
  622. select S3C_GPIO_CFG_S3C24XX
  623. select S3C_GPIO_CFG_S3C64XX
  624. select S3C_DEV_NAND
  625. select USB_ARCH_HAS_OHCI
  626. select SAMSUNG_GPIOLIB_4BIT
  627. select HAVE_S3C2410_I2C if I2C
  628. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  629. help
  630. Samsung S3C64XX series based systems
  631. config ARCH_S5P64X0
  632. bool "Samsung S5P6440 S5P6450"
  633. select CPU_V6
  634. select GENERIC_GPIO
  635. select HAVE_CLK
  636. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  637. select GENERIC_CLOCKEVENTS
  638. select HAVE_SCHED_CLOCK
  639. select HAVE_S3C2410_I2C if I2C
  640. select HAVE_S3C_RTC if RTC_CLASS
  641. help
  642. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  643. SMDK6450.
  644. config ARCH_S5PC100
  645. bool "Samsung S5PC100"
  646. select GENERIC_GPIO
  647. select HAVE_CLK
  648. select CPU_V7
  649. select ARM_L1_CACHE_SHIFT_6
  650. select ARCH_USES_GETTIMEOFFSET
  651. select HAVE_S3C2410_I2C if I2C
  652. select HAVE_S3C_RTC if RTC_CLASS
  653. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  654. help
  655. Samsung S5PC100 series based systems
  656. config ARCH_S5PV210
  657. bool "Samsung S5PV210/S5PC110"
  658. select CPU_V7
  659. select ARCH_SPARSEMEM_ENABLE
  660. select GENERIC_GPIO
  661. select HAVE_CLK
  662. select ARM_L1_CACHE_SHIFT_6
  663. select ARCH_HAS_CPUFREQ
  664. select GENERIC_CLOCKEVENTS
  665. select HAVE_SCHED_CLOCK
  666. select HAVE_S3C2410_I2C if I2C
  667. select HAVE_S3C_RTC if RTC_CLASS
  668. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  669. help
  670. Samsung S5PV210/S5PC110 series based systems
  671. config ARCH_EXYNOS4
  672. bool "Samsung EXYNOS4"
  673. select CPU_V7
  674. select ARCH_SPARSEMEM_ENABLE
  675. select GENERIC_GPIO
  676. select HAVE_CLK
  677. select ARCH_HAS_CPUFREQ
  678. select GENERIC_CLOCKEVENTS
  679. select HAVE_S3C_RTC if RTC_CLASS
  680. select HAVE_S3C2410_I2C if I2C
  681. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  682. help
  683. Samsung EXYNOS4 series based systems
  684. config ARCH_SHARK
  685. bool "Shark"
  686. select CPU_SA110
  687. select ISA
  688. select ISA_DMA
  689. select ZONE_DMA
  690. select PCI
  691. select ARCH_USES_GETTIMEOFFSET
  692. help
  693. Support for the StrongARM based Digital DNARD machine, also known
  694. as "Shark" (<http://www.shark-linux.de/shark.html>).
  695. config ARCH_TCC_926
  696. bool "Telechips TCC ARM926-based systems"
  697. select CLKSRC_MMIO
  698. select CPU_ARM926T
  699. select HAVE_CLK
  700. select CLKDEV_LOOKUP
  701. select GENERIC_CLOCKEVENTS
  702. help
  703. Support for Telechips TCC ARM926-based systems.
  704. config ARCH_U300
  705. bool "ST-Ericsson U300 Series"
  706. depends on MMU
  707. select CLKSRC_MMIO
  708. select CPU_ARM926T
  709. select HAVE_SCHED_CLOCK
  710. select HAVE_TCM
  711. select ARM_AMBA
  712. select ARM_VIC
  713. select GENERIC_CLOCKEVENTS
  714. select CLKDEV_LOOKUP
  715. select GENERIC_GPIO
  716. help
  717. Support for ST-Ericsson U300 series mobile platforms.
  718. config ARCH_U8500
  719. bool "ST-Ericsson U8500 Series"
  720. select CPU_V7
  721. select ARM_AMBA
  722. select GENERIC_CLOCKEVENTS
  723. select CLKDEV_LOOKUP
  724. select ARCH_REQUIRE_GPIOLIB
  725. select ARCH_HAS_CPUFREQ
  726. help
  727. Support for ST-Ericsson's Ux500 architecture
  728. config ARCH_NOMADIK
  729. bool "STMicroelectronics Nomadik"
  730. select ARM_AMBA
  731. select ARM_VIC
  732. select CPU_ARM926T
  733. select CLKDEV_LOOKUP
  734. select GENERIC_CLOCKEVENTS
  735. select ARCH_REQUIRE_GPIOLIB
  736. help
  737. Support for the Nomadik platform by ST-Ericsson
  738. config ARCH_DAVINCI
  739. bool "TI DaVinci"
  740. select GENERIC_CLOCKEVENTS
  741. select ARCH_REQUIRE_GPIOLIB
  742. select ZONE_DMA
  743. select HAVE_IDE
  744. select CLKDEV_LOOKUP
  745. select GENERIC_ALLOCATOR
  746. select GENERIC_IRQ_CHIP
  747. select ARCH_HAS_HOLES_MEMORYMODEL
  748. help
  749. Support for TI's DaVinci platform.
  750. config ARCH_OMAP
  751. bool "TI OMAP"
  752. select HAVE_CLK
  753. select ARCH_REQUIRE_GPIOLIB
  754. select ARCH_HAS_CPUFREQ
  755. select GENERIC_CLOCKEVENTS
  756. select HAVE_SCHED_CLOCK
  757. select ARCH_HAS_HOLES_MEMORYMODEL
  758. help
  759. Support for TI's OMAP platform (OMAP1/2/3/4).
  760. config PLAT_SPEAR
  761. bool "ST SPEAr"
  762. select ARM_AMBA
  763. select ARCH_REQUIRE_GPIOLIB
  764. select CLKDEV_LOOKUP
  765. select CLKSRC_MMIO
  766. select GENERIC_CLOCKEVENTS
  767. select HAVE_CLK
  768. help
  769. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  770. config ARCH_VT8500
  771. bool "VIA/WonderMedia 85xx"
  772. select CPU_ARM926T
  773. select GENERIC_GPIO
  774. select ARCH_HAS_CPUFREQ
  775. select GENERIC_CLOCKEVENTS
  776. select ARCH_REQUIRE_GPIOLIB
  777. select HAVE_PWM
  778. help
  779. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  780. endchoice
  781. #
  782. # This is sorted alphabetically by mach-* pathname. However, plat-*
  783. # Kconfigs may be included either alphabetically (according to the
  784. # plat- suffix) or along side the corresponding mach-* source.
  785. #
  786. source "arch/arm/mach-at91/Kconfig"
  787. source "arch/arm/mach-bcmring/Kconfig"
  788. source "arch/arm/mach-clps711x/Kconfig"
  789. source "arch/arm/mach-cns3xxx/Kconfig"
  790. source "arch/arm/mach-davinci/Kconfig"
  791. source "arch/arm/mach-dove/Kconfig"
  792. source "arch/arm/mach-ep93xx/Kconfig"
  793. source "arch/arm/mach-footbridge/Kconfig"
  794. source "arch/arm/mach-gemini/Kconfig"
  795. source "arch/arm/mach-h720x/Kconfig"
  796. source "arch/arm/mach-integrator/Kconfig"
  797. source "arch/arm/mach-iop32x/Kconfig"
  798. source "arch/arm/mach-iop33x/Kconfig"
  799. source "arch/arm/mach-iop13xx/Kconfig"
  800. source "arch/arm/mach-ixp4xx/Kconfig"
  801. source "arch/arm/mach-ixp2000/Kconfig"
  802. source "arch/arm/mach-ixp23xx/Kconfig"
  803. source "arch/arm/mach-kirkwood/Kconfig"
  804. source "arch/arm/mach-ks8695/Kconfig"
  805. source "arch/arm/mach-loki/Kconfig"
  806. source "arch/arm/mach-lpc32xx/Kconfig"
  807. source "arch/arm/mach-msm/Kconfig"
  808. source "arch/arm/mach-mv78xx0/Kconfig"
  809. source "arch/arm/plat-mxc/Kconfig"
  810. source "arch/arm/mach-mxs/Kconfig"
  811. source "arch/arm/mach-netx/Kconfig"
  812. source "arch/arm/mach-nomadik/Kconfig"
  813. source "arch/arm/plat-nomadik/Kconfig"
  814. source "arch/arm/mach-nuc93x/Kconfig"
  815. source "arch/arm/plat-omap/Kconfig"
  816. source "arch/arm/mach-omap1/Kconfig"
  817. source "arch/arm/mach-omap2/Kconfig"
  818. source "arch/arm/mach-orion5x/Kconfig"
  819. source "arch/arm/mach-pxa/Kconfig"
  820. source "arch/arm/plat-pxa/Kconfig"
  821. source "arch/arm/mach-mmp/Kconfig"
  822. source "arch/arm/mach-realview/Kconfig"
  823. source "arch/arm/mach-sa1100/Kconfig"
  824. source "arch/arm/plat-samsung/Kconfig"
  825. source "arch/arm/plat-s3c24xx/Kconfig"
  826. source "arch/arm/plat-s5p/Kconfig"
  827. source "arch/arm/plat-spear/Kconfig"
  828. source "arch/arm/plat-tcc/Kconfig"
  829. if ARCH_S3C2410
  830. source "arch/arm/mach-s3c2400/Kconfig"
  831. source "arch/arm/mach-s3c2410/Kconfig"
  832. source "arch/arm/mach-s3c2412/Kconfig"
  833. source "arch/arm/mach-s3c2416/Kconfig"
  834. source "arch/arm/mach-s3c2440/Kconfig"
  835. source "arch/arm/mach-s3c2443/Kconfig"
  836. endif
  837. if ARCH_S3C64XX
  838. source "arch/arm/mach-s3c64xx/Kconfig"
  839. endif
  840. source "arch/arm/mach-s5p64x0/Kconfig"
  841. source "arch/arm/mach-s5pc100/Kconfig"
  842. source "arch/arm/mach-s5pv210/Kconfig"
  843. source "arch/arm/mach-exynos4/Kconfig"
  844. source "arch/arm/mach-shmobile/Kconfig"
  845. source "arch/arm/mach-tegra/Kconfig"
  846. source "arch/arm/mach-u300/Kconfig"
  847. source "arch/arm/mach-ux500/Kconfig"
  848. source "arch/arm/mach-versatile/Kconfig"
  849. source "arch/arm/mach-vexpress/Kconfig"
  850. source "arch/arm/plat-versatile/Kconfig"
  851. source "arch/arm/mach-vt8500/Kconfig"
  852. source "arch/arm/mach-w90x900/Kconfig"
  853. # Definitions to make life easier
  854. config ARCH_ACORN
  855. bool
  856. config PLAT_IOP
  857. bool
  858. select GENERIC_CLOCKEVENTS
  859. select HAVE_SCHED_CLOCK
  860. config PLAT_ORION
  861. bool
  862. select CLKSRC_MMIO
  863. select GENERIC_IRQ_CHIP
  864. select HAVE_SCHED_CLOCK
  865. config PLAT_PXA
  866. bool
  867. config PLAT_VERSATILE
  868. bool
  869. config ARM_TIMER_SP804
  870. bool
  871. select CLKSRC_MMIO
  872. source arch/arm/mm/Kconfig
  873. config IWMMXT
  874. bool "Enable iWMMXt support"
  875. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  876. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  877. help
  878. Enable support for iWMMXt context switching at run time if
  879. running on a CPU that supports it.
  880. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  881. config XSCALE_PMU
  882. bool
  883. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  884. default y
  885. config CPU_HAS_PMU
  886. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  887. (!ARCH_OMAP3 || OMAP3_EMU)
  888. default y
  889. bool
  890. config MULTI_IRQ_HANDLER
  891. bool
  892. help
  893. Allow each machine to specify it's own IRQ handler at run time.
  894. if !MMU
  895. source "arch/arm/Kconfig-nommu"
  896. endif
  897. config ARM_ERRATA_411920
  898. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  899. depends on CPU_V6 || CPU_V6K
  900. help
  901. Invalidation of the Instruction Cache operation can
  902. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  903. It does not affect the MPCore. This option enables the ARM Ltd.
  904. recommended workaround.
  905. config ARM_ERRATA_430973
  906. bool "ARM errata: Stale prediction on replaced interworking branch"
  907. depends on CPU_V7
  908. help
  909. This option enables the workaround for the 430973 Cortex-A8
  910. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  911. interworking branch is replaced with another code sequence at the
  912. same virtual address, whether due to self-modifying code or virtual
  913. to physical address re-mapping, Cortex-A8 does not recover from the
  914. stale interworking branch prediction. This results in Cortex-A8
  915. executing the new code sequence in the incorrect ARM or Thumb state.
  916. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  917. and also flushes the branch target cache at every context switch.
  918. Note that setting specific bits in the ACTLR register may not be
  919. available in non-secure mode.
  920. config ARM_ERRATA_458693
  921. bool "ARM errata: Processor deadlock when a false hazard is created"
  922. depends on CPU_V7
  923. help
  924. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  925. erratum. For very specific sequences of memory operations, it is
  926. possible for a hazard condition intended for a cache line to instead
  927. be incorrectly associated with a different cache line. This false
  928. hazard might then cause a processor deadlock. The workaround enables
  929. the L1 caching of the NEON accesses and disables the PLD instruction
  930. in the ACTLR register. Note that setting specific bits in the ACTLR
  931. register may not be available in non-secure mode.
  932. config ARM_ERRATA_460075
  933. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  934. depends on CPU_V7
  935. help
  936. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  937. erratum. Any asynchronous access to the L2 cache may encounter a
  938. situation in which recent store transactions to the L2 cache are lost
  939. and overwritten with stale memory contents from external memory. The
  940. workaround disables the write-allocate mode for the L2 cache via the
  941. ACTLR register. Note that setting specific bits in the ACTLR register
  942. may not be available in non-secure mode.
  943. config ARM_ERRATA_742230
  944. bool "ARM errata: DMB operation may be faulty"
  945. depends on CPU_V7 && SMP
  946. help
  947. This option enables the workaround for the 742230 Cortex-A9
  948. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  949. between two write operations may not ensure the correct visibility
  950. ordering of the two writes. This workaround sets a specific bit in
  951. the diagnostic register of the Cortex-A9 which causes the DMB
  952. instruction to behave as a DSB, ensuring the correct behaviour of
  953. the two writes.
  954. config ARM_ERRATA_742231
  955. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  956. depends on CPU_V7 && SMP
  957. help
  958. This option enables the workaround for the 742231 Cortex-A9
  959. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  960. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  961. accessing some data located in the same cache line, may get corrupted
  962. data due to bad handling of the address hazard when the line gets
  963. replaced from one of the CPUs at the same time as another CPU is
  964. accessing it. This workaround sets specific bits in the diagnostic
  965. register of the Cortex-A9 which reduces the linefill issuing
  966. capabilities of the processor.
  967. config PL310_ERRATA_588369
  968. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  969. depends on CACHE_L2X0
  970. help
  971. The PL310 L2 cache controller implements three types of Clean &
  972. Invalidate maintenance operations: by Physical Address
  973. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  974. They are architecturally defined to behave as the execution of a
  975. clean operation followed immediately by an invalidate operation,
  976. both performing to the same memory location. This functionality
  977. is not correctly implemented in PL310 as clean lines are not
  978. invalidated as a result of these operations.
  979. config ARM_ERRATA_720789
  980. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  981. depends on CPU_V7 && SMP
  982. help
  983. This option enables the workaround for the 720789 Cortex-A9 (prior to
  984. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  985. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  986. As a consequence of this erratum, some TLB entries which should be
  987. invalidated are not, resulting in an incoherency in the system page
  988. tables. The workaround changes the TLB flushing routines to invalidate
  989. entries regardless of the ASID.
  990. config PL310_ERRATA_727915
  991. bool "Background Clean & Invalidate by Way operation can cause data corruption"
  992. depends on CACHE_L2X0
  993. help
  994. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  995. operation (offset 0x7FC). This operation runs in background so that
  996. PL310 can handle normal accesses while it is in progress. Under very
  997. rare circumstances, due to this erratum, write data can be lost when
  998. PL310 treats a cacheable write transaction during a Clean &
  999. Invalidate by Way operation.
  1000. config ARM_ERRATA_743622
  1001. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1002. depends on CPU_V7
  1003. help
  1004. This option enables the workaround for the 743622 Cortex-A9
  1005. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1006. optimisation in the Cortex-A9 Store Buffer may lead to data
  1007. corruption. This workaround sets a specific bit in the diagnostic
  1008. register of the Cortex-A9 which disables the Store Buffer
  1009. optimisation, preventing the defect from occurring. This has no
  1010. visible impact on the overall performance or power consumption of the
  1011. processor.
  1012. config ARM_ERRATA_751472
  1013. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1014. depends on CPU_V7 && SMP
  1015. help
  1016. This option enables the workaround for the 751472 Cortex-A9 (prior
  1017. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1018. completion of a following broadcasted operation if the second
  1019. operation is received by a CPU before the ICIALLUIS has completed,
  1020. potentially leading to corrupted entries in the cache or TLB.
  1021. config ARM_ERRATA_753970
  1022. bool "ARM errata: cache sync operation may be faulty"
  1023. depends on CACHE_PL310
  1024. help
  1025. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1026. Under some condition the effect of cache sync operation on
  1027. the store buffer still remains when the operation completes.
  1028. This means that the store buffer is always asked to drain and
  1029. this prevents it from merging any further writes. The workaround
  1030. is to replace the normal offset of cache sync operation (0x730)
  1031. by another offset targeting an unmapped PL310 register 0x740.
  1032. This has the same effect as the cache sync operation: store buffer
  1033. drain and waiting for all buffers empty.
  1034. config ARM_ERRATA_754322
  1035. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1036. depends on CPU_V7
  1037. help
  1038. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1039. r3p*) erratum. A speculative memory access may cause a page table walk
  1040. which starts prior to an ASID switch but completes afterwards. This
  1041. can populate the micro-TLB with a stale entry which may be hit with
  1042. the new ASID. This workaround places two dsb instructions in the mm
  1043. switching code so that no page table walks can cross the ASID switch.
  1044. config ARM_ERRATA_754327
  1045. bool "ARM errata: no automatic Store Buffer drain"
  1046. depends on CPU_V7 && SMP
  1047. help
  1048. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1049. r2p0) erratum. The Store Buffer does not have any automatic draining
  1050. mechanism and therefore a livelock may occur if an external agent
  1051. continuously polls a memory location waiting to observe an update.
  1052. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1053. written polling loops from denying visibility of updates to memory.
  1054. endmenu
  1055. source "arch/arm/common/Kconfig"
  1056. menu "Bus support"
  1057. config ARM_AMBA
  1058. bool
  1059. config ISA
  1060. bool
  1061. help
  1062. Find out whether you have ISA slots on your motherboard. ISA is the
  1063. name of a bus system, i.e. the way the CPU talks to the other stuff
  1064. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1065. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1066. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1067. # Select ISA DMA controller support
  1068. config ISA_DMA
  1069. bool
  1070. select ISA_DMA_API
  1071. # Select ISA DMA interface
  1072. config ISA_DMA_API
  1073. bool
  1074. config PCI
  1075. bool "PCI support" if MIGHT_HAVE_PCI
  1076. help
  1077. Find out whether you have a PCI motherboard. PCI is the name of a
  1078. bus system, i.e. the way the CPU talks to the other stuff inside
  1079. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1080. VESA. If you have PCI, say Y, otherwise N.
  1081. config PCI_DOMAINS
  1082. bool
  1083. depends on PCI
  1084. config PCI_NANOENGINE
  1085. bool "BSE nanoEngine PCI support"
  1086. depends on SA1100_NANOENGINE
  1087. help
  1088. Enable PCI on the BSE nanoEngine board.
  1089. config PCI_SYSCALL
  1090. def_bool PCI
  1091. # Select the host bridge type
  1092. config PCI_HOST_VIA82C505
  1093. bool
  1094. depends on PCI && ARCH_SHARK
  1095. default y
  1096. config PCI_HOST_ITE8152
  1097. bool
  1098. depends on PCI && MACH_ARMCORE
  1099. default y
  1100. select DMABOUNCE
  1101. source "drivers/pci/Kconfig"
  1102. source "drivers/pcmcia/Kconfig"
  1103. endmenu
  1104. menu "Kernel Features"
  1105. source "kernel/time/Kconfig"
  1106. config SMP
  1107. bool "Symmetric Multi-Processing"
  1108. depends on CPU_V6K || CPU_V7
  1109. depends on GENERIC_CLOCKEVENTS
  1110. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1111. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1112. ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
  1113. ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
  1114. select USE_GENERIC_SMP_HELPERS
  1115. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1116. help
  1117. This enables support for systems with more than one CPU. If you have
  1118. a system with only one CPU, like most personal computers, say N. If
  1119. you have a system with more than one CPU, say Y.
  1120. If you say N here, the kernel will run on single and multiprocessor
  1121. machines, but will use only one CPU of a multiprocessor machine. If
  1122. you say Y here, the kernel will run on many, but not all, single
  1123. processor machines. On a single processor machine, the kernel will
  1124. run faster if you say N here.
  1125. See also <file:Documentation/i386/IO-APIC.txt>,
  1126. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1127. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1128. If you don't know what to do here, say N.
  1129. config SMP_ON_UP
  1130. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1131. depends on EXPERIMENTAL
  1132. depends on SMP && !XIP_KERNEL
  1133. default y
  1134. help
  1135. SMP kernels contain instructions which fail on non-SMP processors.
  1136. Enabling this option allows the kernel to modify itself to make
  1137. these instructions safe. Disabling it allows about 1K of space
  1138. savings.
  1139. If you don't know what to do here, say Y.
  1140. config HAVE_ARM_SCU
  1141. bool
  1142. depends on SMP
  1143. help
  1144. This option enables support for the ARM system coherency unit
  1145. config HAVE_ARM_TWD
  1146. bool
  1147. depends on SMP
  1148. select TICK_ONESHOT
  1149. help
  1150. This options enables support for the ARM timer and watchdog unit
  1151. choice
  1152. prompt "Memory split"
  1153. default VMSPLIT_3G
  1154. help
  1155. Select the desired split between kernel and user memory.
  1156. If you are not absolutely sure what you are doing, leave this
  1157. option alone!
  1158. config VMSPLIT_3G
  1159. bool "3G/1G user/kernel split"
  1160. config VMSPLIT_2G
  1161. bool "2G/2G user/kernel split"
  1162. config VMSPLIT_1G
  1163. bool "1G/3G user/kernel split"
  1164. endchoice
  1165. config PAGE_OFFSET
  1166. hex
  1167. default 0x40000000 if VMSPLIT_1G
  1168. default 0x80000000 if VMSPLIT_2G
  1169. default 0xC0000000
  1170. config NR_CPUS
  1171. int "Maximum number of CPUs (2-32)"
  1172. range 2 32
  1173. depends on SMP
  1174. default "4"
  1175. config HOTPLUG_CPU
  1176. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1177. depends on SMP && HOTPLUG && EXPERIMENTAL
  1178. help
  1179. Say Y here to experiment with turning CPUs off and on. CPUs
  1180. can be controlled through /sys/devices/system/cpu.
  1181. config LOCAL_TIMERS
  1182. bool "Use local timer interrupts"
  1183. depends on SMP
  1184. default y
  1185. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1186. help
  1187. Enable support for local timers on SMP platforms, rather then the
  1188. legacy IPI broadcast method. Local timers allows the system
  1189. accounting to be spread across the timer interval, preventing a
  1190. "thundering herd" at every timer tick.
  1191. source kernel/Kconfig.preempt
  1192. config HZ
  1193. int
  1194. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1195. ARCH_S5PV210 || ARCH_EXYNOS4
  1196. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1197. default AT91_TIMER_HZ if ARCH_AT91
  1198. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1199. default 100
  1200. config THUMB2_KERNEL
  1201. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1202. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1203. select AEABI
  1204. select ARM_ASM_UNIFIED
  1205. help
  1206. By enabling this option, the kernel will be compiled in
  1207. Thumb-2 mode. A compiler/assembler that understand the unified
  1208. ARM-Thumb syntax is needed.
  1209. If unsure, say N.
  1210. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1211. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1212. depends on THUMB2_KERNEL && MODULES
  1213. default y
  1214. help
  1215. Various binutils versions can resolve Thumb-2 branches to
  1216. locally-defined, preemptible global symbols as short-range "b.n"
  1217. branch instructions.
  1218. This is a problem, because there's no guarantee the final
  1219. destination of the symbol, or any candidate locations for a
  1220. trampoline, are within range of the branch. For this reason, the
  1221. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1222. relocation in modules at all, and it makes little sense to add
  1223. support.
  1224. The symptom is that the kernel fails with an "unsupported
  1225. relocation" error when loading some modules.
  1226. Until fixed tools are available, passing
  1227. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1228. code which hits this problem, at the cost of a bit of extra runtime
  1229. stack usage in some cases.
  1230. The problem is described in more detail at:
  1231. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1232. Only Thumb-2 kernels are affected.
  1233. Unless you are sure your tools don't have this problem, say Y.
  1234. config ARM_ASM_UNIFIED
  1235. bool
  1236. config AEABI
  1237. bool "Use the ARM EABI to compile the kernel"
  1238. help
  1239. This option allows for the kernel to be compiled using the latest
  1240. ARM ABI (aka EABI). This is only useful if you are using a user
  1241. space environment that is also compiled with EABI.
  1242. Since there are major incompatibilities between the legacy ABI and
  1243. EABI, especially with regard to structure member alignment, this
  1244. option also changes the kernel syscall calling convention to
  1245. disambiguate both ABIs and allow for backward compatibility support
  1246. (selected with CONFIG_OABI_COMPAT).
  1247. To use this you need GCC version 4.0.0 or later.
  1248. config OABI_COMPAT
  1249. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1250. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1251. default y
  1252. help
  1253. This option preserves the old syscall interface along with the
  1254. new (ARM EABI) one. It also provides a compatibility layer to
  1255. intercept syscalls that have structure arguments which layout
  1256. in memory differs between the legacy ABI and the new ARM EABI
  1257. (only for non "thumb" binaries). This option adds a tiny
  1258. overhead to all syscalls and produces a slightly larger kernel.
  1259. If you know you'll be using only pure EABI user space then you
  1260. can say N here. If this option is not selected and you attempt
  1261. to execute a legacy ABI binary then the result will be
  1262. UNPREDICTABLE (in fact it can be predicted that it won't work
  1263. at all). If in doubt say Y.
  1264. config ARCH_HAS_HOLES_MEMORYMODEL
  1265. bool
  1266. config ARCH_SPARSEMEM_ENABLE
  1267. bool
  1268. config ARCH_SPARSEMEM_DEFAULT
  1269. def_bool ARCH_SPARSEMEM_ENABLE
  1270. config ARCH_SELECT_MEMORY_MODEL
  1271. def_bool ARCH_SPARSEMEM_ENABLE
  1272. config HAVE_ARCH_PFN_VALID
  1273. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1274. config HIGHMEM
  1275. bool "High Memory Support"
  1276. depends on MMU
  1277. help
  1278. The address space of ARM processors is only 4 Gigabytes large
  1279. and it has to accommodate user address space, kernel address
  1280. space as well as some memory mapped IO. That means that, if you
  1281. have a large amount of physical memory and/or IO, not all of the
  1282. memory can be "permanently mapped" by the kernel. The physical
  1283. memory that is not permanently mapped is called "high memory".
  1284. Depending on the selected kernel/user memory split, minimum
  1285. vmalloc space and actual amount of RAM, you may not need this
  1286. option which should result in a slightly faster kernel.
  1287. If unsure, say n.
  1288. config HIGHPTE
  1289. bool "Allocate 2nd-level pagetables from highmem"
  1290. depends on HIGHMEM
  1291. config HW_PERF_EVENTS
  1292. bool "Enable hardware performance counter support for perf events"
  1293. depends on PERF_EVENTS && CPU_HAS_PMU
  1294. default y
  1295. help
  1296. Enable hardware performance counter support for perf events. If
  1297. disabled, perf events will use software events only.
  1298. source "mm/Kconfig"
  1299. config FORCE_MAX_ZONEORDER
  1300. int "Maximum zone order" if ARCH_SHMOBILE
  1301. range 11 64 if ARCH_SHMOBILE
  1302. default "9" if SA1111
  1303. default "11"
  1304. help
  1305. The kernel memory allocator divides physically contiguous memory
  1306. blocks into "zones", where each zone is a power of two number of
  1307. pages. This option selects the largest power of two that the kernel
  1308. keeps in the memory allocator. If you need to allocate very large
  1309. blocks of physically contiguous memory, then you may need to
  1310. increase this value.
  1311. This config option is actually maximum order plus one. For example,
  1312. a value of 11 means that the largest free memory block is 2^10 pages.
  1313. config LEDS
  1314. bool "Timer and CPU usage LEDs"
  1315. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1316. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1317. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1318. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1319. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1320. ARCH_AT91 || ARCH_DAVINCI || \
  1321. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1322. help
  1323. If you say Y here, the LEDs on your machine will be used
  1324. to provide useful information about your current system status.
  1325. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1326. be able to select which LEDs are active using the options below. If
  1327. you are compiling a kernel for the EBSA-110 or the LART however, the
  1328. red LED will simply flash regularly to indicate that the system is
  1329. still functional. It is safe to say Y here if you have a CATS
  1330. system, but the driver will do nothing.
  1331. config LEDS_TIMER
  1332. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1333. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1334. || MACH_OMAP_PERSEUS2
  1335. depends on LEDS
  1336. depends on !GENERIC_CLOCKEVENTS
  1337. default y if ARCH_EBSA110
  1338. help
  1339. If you say Y here, one of the system LEDs (the green one on the
  1340. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1341. will flash regularly to indicate that the system is still
  1342. operational. This is mainly useful to kernel hackers who are
  1343. debugging unstable kernels.
  1344. The LART uses the same LED for both Timer LED and CPU usage LED
  1345. functions. You may choose to use both, but the Timer LED function
  1346. will overrule the CPU usage LED.
  1347. config LEDS_CPU
  1348. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1349. !ARCH_OMAP) \
  1350. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1351. || MACH_OMAP_PERSEUS2
  1352. depends on LEDS
  1353. help
  1354. If you say Y here, the red LED will be used to give a good real
  1355. time indication of CPU usage, by lighting whenever the idle task
  1356. is not currently executing.
  1357. The LART uses the same LED for both Timer LED and CPU usage LED
  1358. functions. You may choose to use both, but the Timer LED function
  1359. will overrule the CPU usage LED.
  1360. config ALIGNMENT_TRAP
  1361. bool
  1362. depends on CPU_CP15_MMU
  1363. default y if !ARCH_EBSA110
  1364. select HAVE_PROC_CPU if PROC_FS
  1365. help
  1366. ARM processors cannot fetch/store information which is not
  1367. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1368. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1369. fetch/store instructions will be emulated in software if you say
  1370. here, which has a severe performance impact. This is necessary for
  1371. correct operation of some network protocols. With an IP-only
  1372. configuration it is safe to say N, otherwise say Y.
  1373. config UACCESS_WITH_MEMCPY
  1374. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1375. depends on MMU && EXPERIMENTAL
  1376. default y if CPU_FEROCEON
  1377. help
  1378. Implement faster copy_to_user and clear_user methods for CPU
  1379. cores where a 8-word STM instruction give significantly higher
  1380. memory write throughput than a sequence of individual 32bit stores.
  1381. A possible side effect is a slight increase in scheduling latency
  1382. between threads sharing the same address space if they invoke
  1383. such copy operations with large buffers.
  1384. However, if the CPU data cache is using a write-allocate mode,
  1385. this option is unlikely to provide any performance gain.
  1386. config SECCOMP
  1387. bool
  1388. prompt "Enable seccomp to safely compute untrusted bytecode"
  1389. ---help---
  1390. This kernel feature is useful for number crunching applications
  1391. that may need to compute untrusted bytecode during their
  1392. execution. By using pipes or other transports made available to
  1393. the process as file descriptors supporting the read/write
  1394. syscalls, it's possible to isolate those applications in
  1395. their own address space using seccomp. Once seccomp is
  1396. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1397. and the task is only allowed to execute a few safe syscalls
  1398. defined by each seccomp mode.
  1399. config CC_STACKPROTECTOR
  1400. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1401. depends on EXPERIMENTAL
  1402. help
  1403. This option turns on the -fstack-protector GCC feature. This
  1404. feature puts, at the beginning of functions, a canary value on
  1405. the stack just before the return address, and validates
  1406. the value just before actually returning. Stack based buffer
  1407. overflows (that need to overwrite this return address) now also
  1408. overwrite the canary, which gets detected and the attack is then
  1409. neutralized via a kernel panic.
  1410. This feature requires gcc version 4.2 or above.
  1411. config DEPRECATED_PARAM_STRUCT
  1412. bool "Provide old way to pass kernel parameters"
  1413. help
  1414. This was deprecated in 2001 and announced to live on for 5 years.
  1415. Some old boot loaders still use this way.
  1416. endmenu
  1417. menu "Boot options"
  1418. config USE_OF
  1419. bool "Flattened Device Tree support"
  1420. select OF
  1421. select OF_EARLY_FLATTREE
  1422. help
  1423. Include support for flattened device tree machine descriptions.
  1424. # Compressed boot loader in ROM. Yes, we really want to ask about
  1425. # TEXT and BSS so we preserve their values in the config files.
  1426. config ZBOOT_ROM_TEXT
  1427. hex "Compressed ROM boot loader base address"
  1428. default "0"
  1429. help
  1430. The physical address at which the ROM-able zImage is to be
  1431. placed in the target. Platforms which normally make use of
  1432. ROM-able zImage formats normally set this to a suitable
  1433. value in their defconfig file.
  1434. If ZBOOT_ROM is not enabled, this has no effect.
  1435. config ZBOOT_ROM_BSS
  1436. hex "Compressed ROM boot loader BSS address"
  1437. default "0"
  1438. help
  1439. The base address of an area of read/write memory in the target
  1440. for the ROM-able zImage which must be available while the
  1441. decompressor is running. It must be large enough to hold the
  1442. entire decompressed kernel plus an additional 128 KiB.
  1443. Platforms which normally make use of ROM-able zImage formats
  1444. normally set this to a suitable value in their defconfig file.
  1445. If ZBOOT_ROM is not enabled, this has no effect.
  1446. config ZBOOT_ROM
  1447. bool "Compressed boot loader in ROM/flash"
  1448. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1449. help
  1450. Say Y here if you intend to execute your compressed kernel image
  1451. (zImage) directly from ROM or flash. If unsure, say N.
  1452. config ZBOOT_ROM_MMCIF
  1453. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1454. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1455. help
  1456. Say Y here to include experimental MMCIF loading code in the
  1457. ROM-able zImage. With this enabled it is possible to write the
  1458. the ROM-able zImage kernel image to an MMC card and boot the
  1459. kernel straight from the reset vector. At reset the processor
  1460. Mask ROM will load the first part of the the ROM-able zImage
  1461. which in turn loads the rest the kernel image to RAM using the
  1462. MMCIF hardware block.
  1463. config CMDLINE
  1464. string "Default kernel command string"
  1465. default ""
  1466. help
  1467. On some architectures (EBSA110 and CATS), there is currently no way
  1468. for the boot loader to pass arguments to the kernel. For these
  1469. architectures, you should supply some command-line options at build
  1470. time by entering them here. As a minimum, you should specify the
  1471. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1472. choice
  1473. prompt "Kernel command line type" if CMDLINE != ""
  1474. default CMDLINE_FROM_BOOTLOADER
  1475. config CMDLINE_FROM_BOOTLOADER
  1476. bool "Use bootloader kernel arguments if available"
  1477. help
  1478. Uses the command-line options passed by the boot loader. If
  1479. the boot loader doesn't provide any, the default kernel command
  1480. string provided in CMDLINE will be used.
  1481. config CMDLINE_EXTEND
  1482. bool "Extend bootloader kernel arguments"
  1483. help
  1484. The command-line arguments provided by the boot loader will be
  1485. appended to the default kernel command string.
  1486. config CMDLINE_FORCE
  1487. bool "Always use the default kernel command string"
  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. endchoice
  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_S5PC100
  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"