Kconfig 64 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991001011021031041051061071081091101111121131141151161171181191201211221231241251261271281291301311321331341351361371381391401411421431441451461471481491501511521531541551561571581591601611621631641651661671681691701711721731741751761771781791801811821831841851861871881891901911921931941951961971981992002012022032042052062072082092102112122132142152162172182192202212222232242252262272282292302312322332342352362372382392402412422432442452462472482492502512522532542552562572582592602612622632642652662672682692702712722732742752762772782792802812822832842852862872882892902912922932942952962972982993003013023033043053063073083093103113123133143153163173183193203213223233243253263273283293303313323333343353363373383393403413423433443453463473483493503513523533543553563573583593603613623633643653663673683693703713723733743753763773783793803813823833843853863873883893903913923933943953963973983994004014024034044054064074084094104114124134144154164174184194204214224234244254264274284294304314324334344354364374384394404414424434444454464474484494504514524534544554564574584594604614624634644654664674684694704714724734744754764774784794804814824834844854864874884894904914924934944954964974984995005015025035045055065075085095105115125135145155165175185195205215225235245255265275285295305315325335345355365375385395405415425435445455465475485495505515525535545555565575585595605615625635645655665675685695705715725735745755765775785795805815825835845855865875885895905915925935945955965975985996006016026036046056066076086096106116126136146156166176186196206216226236246256266276286296306316326336346356366376386396406416426436446456466476486496506516526536546556566576586596606616626636646656666676686696706716726736746756766776786796806816826836846856866876886896906916926936946956966976986997007017027037047057067077087097107117127137147157167177187197207217227237247257267277287297307317327337347357367377387397407417427437447457467477487497507517527537547557567577587597607617627637647657667677687697707717727737747757767777787797807817827837847857867877887897907917927937947957967977987998008018028038048058068078088098108118128138148158168178188198208218228238248258268278288298308318328338348358368378388398408418428438448458468478488498508518528538548558568578588598608618628638648658668678688698708718728738748758768778788798808818828838848858868878888898908918928938948958968978988999009019029039049059069079089099109119129139149159169179189199209219229239249259269279289299309319329339349359369379389399409419429439449459469479489499509519529539549559569579589599609619629639649659669679689699709719729739749759769779789799809819829839849859869879889899909919929939949959969979989991000100110021003100410051006100710081009101010111012101310141015101610171018101910201021102210231024102510261027102810291030103110321033103410351036103710381039104010411042104310441045104610471048104910501051105210531054105510561057105810591060106110621063106410651066106710681069107010711072107310741075107610771078107910801081108210831084108510861087108810891090109110921093109410951096109710981099110011011102110311041105110611071108110911101111111211131114111511161117111811191120112111221123112411251126112711281129113011311132113311341135113611371138113911401141114211431144114511461147114811491150115111521153115411551156115711581159116011611162116311641165116611671168116911701171117211731174117511761177117811791180118111821183118411851186118711881189119011911192119311941195119611971198119912001201120212031204120512061207120812091210121112121213121412151216121712181219122012211222122312241225122612271228122912301231123212331234123512361237123812391240124112421243124412451246124712481249125012511252125312541255125612571258125912601261126212631264126512661267126812691270127112721273127412751276127712781279128012811282128312841285128612871288128912901291129212931294129512961297129812991300130113021303130413051306130713081309131013111312131313141315131613171318131913201321132213231324132513261327132813291330133113321333133413351336133713381339134013411342134313441345134613471348134913501351135213531354135513561357135813591360136113621363136413651366136713681369137013711372137313741375137613771378137913801381138213831384138513861387138813891390139113921393139413951396139713981399140014011402140314041405140614071408140914101411141214131414141514161417141814191420142114221423142414251426142714281429143014311432143314341435143614371438143914401441144214431444144514461447144814491450145114521453145414551456145714581459146014611462146314641465146614671468146914701471147214731474147514761477147814791480148114821483148414851486148714881489149014911492149314941495149614971498149915001501150215031504150515061507150815091510151115121513151415151516151715181519152015211522152315241525152615271528152915301531153215331534153515361537153815391540154115421543154415451546154715481549155015511552155315541555155615571558155915601561156215631564156515661567156815691570157115721573157415751576157715781579158015811582158315841585158615871588158915901591159215931594159515961597159815991600160116021603160416051606160716081609161016111612161316141615161616171618161916201621162216231624162516261627162816291630163116321633163416351636163716381639164016411642164316441645164616471648164916501651165216531654165516561657165816591660166116621663166416651666166716681669167016711672167316741675167616771678167916801681168216831684168516861687168816891690169116921693169416951696169716981699170017011702170317041705170617071708170917101711171217131714171517161717171817191720172117221723172417251726172717281729173017311732173317341735173617371738173917401741174217431744174517461747174817491750175117521753175417551756175717581759176017611762176317641765176617671768176917701771177217731774177517761777177817791780178117821783178417851786178717881789179017911792179317941795179617971798179918001801180218031804180518061807180818091810181118121813181418151816181718181819182018211822182318241825182618271828182918301831183218331834183518361837183818391840184118421843184418451846184718481849185018511852185318541855185618571858185918601861186218631864186518661867186818691870187118721873187418751876187718781879188018811882188318841885188618871888188918901891189218931894189518961897189818991900190119021903190419051906190719081909191019111912191319141915191619171918191919201921192219231924192519261927192819291930193119321933193419351936193719381939194019411942194319441945194619471948194919501951195219531954195519561957195819591960196119621963196419651966196719681969197019711972197319741975197619771978197919801981198219831984198519861987198819891990199119921993199419951996199719981999200020012002200320042005200620072008200920102011201220132014201520162017201820192020202120222023202420252026202720282029203020312032203320342035203620372038203920402041204220432044204520462047204820492050205120522053205420552056205720582059206020612062206320642065206620672068206920702071207220732074207520762077207820792080208120822083208420852086208720882089209020912092209320942095209620972098209921002101210221032104210521062107210821092110211121122113211421152116211721182119212021212122212321242125212621272128212921302131213221332134213521362137213821392140214121422143214421452146214721482149215021512152215321542155215621572158215921602161216221632164216521662167216821692170217121722173217421752176217721782179218021812182218321842185218621872188218921902191219221932194219521962197219821992200220122022203220422052206220722082209221022112212221322142215221622172218221922202221222222232224222522262227222822292230223122322233223422352236223722382239224022412242224322442245224622472248224922502251225222532254225522562257225822592260226122622263
  1. config ARM
  2. bool
  3. default y
  4. select HAVE_AOUT
  5. select HAVE_DMA_API_DEBUG
  6. select HAVE_IDE if PCI || ISA || PCMCIA
  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
  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. select CPU_PM if (SUSPEND || CPU_IDLE)
  33. help
  34. The ARM series is a line of low-power-consumption RISC chip designs
  35. licensed by ARM Ltd and targeted at embedded applications and
  36. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  37. manufactured, but legacy ARM-based PC hardware remains popular in
  38. Europe. There is an ARM Linux project with a web page at
  39. <http://www.arm.linux.org.uk/>.
  40. config ARM_HAS_SG_CHAIN
  41. bool
  42. config HAVE_PWM
  43. bool
  44. config MIGHT_HAVE_PCI
  45. bool
  46. config SYS_SUPPORTS_APM_EMULATION
  47. bool
  48. config HAVE_SCHED_CLOCK
  49. bool
  50. config GENERIC_GPIO
  51. bool
  52. config ARCH_USES_GETTIMEOFFSET
  53. bool
  54. default n
  55. config GENERIC_CLOCKEVENTS
  56. bool
  57. config GENERIC_CLOCKEVENTS_BROADCAST
  58. bool
  59. depends on GENERIC_CLOCKEVENTS
  60. default y if SMP
  61. config KTIME_SCALAR
  62. bool
  63. default y
  64. config HAVE_TCM
  65. bool
  66. select GENERIC_ALLOCATOR
  67. config HAVE_PROC_CPU
  68. bool
  69. config NO_IOPORT
  70. bool
  71. config EISA
  72. bool
  73. ---help---
  74. The Extended Industry Standard Architecture (EISA) bus was
  75. developed as an open alternative to the IBM MicroChannel bus.
  76. The EISA bus provided some of the features of the IBM MicroChannel
  77. bus while maintaining backward compatibility with cards made for
  78. the older ISA bus. The EISA bus saw limited use between 1988 and
  79. 1995 when it was made obsolete by the PCI bus.
  80. Say Y here if you are building a kernel for an EISA-based machine.
  81. Otherwise, say N.
  82. config SBUS
  83. bool
  84. config MCA
  85. bool
  86. help
  87. MicroChannel Architecture is found in some IBM PS/2 machines and
  88. laptops. It is a bus system similar to PCI or ISA. See
  89. <file:Documentation/mca.txt> (and especially the web page given
  90. there) before attempting to build an MCA bus kernel.
  91. config STACKTRACE_SUPPORT
  92. bool
  93. default y
  94. config HAVE_LATENCYTOP_SUPPORT
  95. bool
  96. depends on !SMP
  97. default y
  98. config LOCKDEP_SUPPORT
  99. bool
  100. default y
  101. config TRACE_IRQFLAGS_SUPPORT
  102. bool
  103. default y
  104. config HARDIRQS_SW_RESEND
  105. bool
  106. default y
  107. config GENERIC_IRQ_PROBE
  108. bool
  109. default y
  110. config GENERIC_LOCKBREAK
  111. bool
  112. default y
  113. depends on SMP && PREEMPT
  114. config RWSEM_GENERIC_SPINLOCK
  115. bool
  116. default y
  117. config RWSEM_XCHGADD_ALGORITHM
  118. bool
  119. config ARCH_HAS_ILOG2_U32
  120. bool
  121. config ARCH_HAS_ILOG2_U64
  122. bool
  123. config ARCH_HAS_CPUFREQ
  124. bool
  125. help
  126. Internal node to signify that the ARCH has CPUFREQ support
  127. and that the relevant menu configurations are displayed for
  128. it.
  129. config ARCH_HAS_CPU_IDLE_WAIT
  130. def_bool y
  131. config GENERIC_HWEIGHT
  132. bool
  133. default y
  134. config GENERIC_CALIBRATE_DELAY
  135. bool
  136. default y
  137. config ARCH_MAY_HAVE_PC_FDC
  138. bool
  139. config ZONE_DMA
  140. bool
  141. config NEED_DMA_MAP_STATE
  142. def_bool y
  143. config GENERIC_ISA_DMA
  144. bool
  145. config FIQ
  146. bool
  147. config ARCH_MTD_XIP
  148. bool
  149. config VECTORS_BASE
  150. hex
  151. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  152. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  153. default 0x00000000
  154. help
  155. The base address of exception vectors.
  156. config ARM_PATCH_PHYS_VIRT
  157. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  158. default y
  159. depends on !XIP_KERNEL && MMU
  160. depends on !ARCH_REALVIEW || !SPARSEMEM
  161. help
  162. Patch phys-to-virt and virt-to-phys translation functions at
  163. boot and module load time according to the position of the
  164. kernel in system memory.
  165. This can only be used with non-XIP MMU kernels where the base
  166. of physical memory is at a 16MB boundary.
  167. Only disable this option if you know that you do not require
  168. this feature (eg, building a kernel for a single machine) and
  169. you need to shrink the kernel to the minimal size.
  170. config NEED_MACH_MEMORY_H
  171. bool
  172. help
  173. Select this when mach/memory.h is required to provide special
  174. definitions for this platform. The need for mach/memory.h should
  175. be avoided when possible.
  176. config PHYS_OFFSET
  177. hex "Physical address of main memory"
  178. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  179. help
  180. Please provide the physical address corresponding to the
  181. location of main memory in your system.
  182. config GENERIC_BUG
  183. def_bool y
  184. depends on BUG
  185. source "init/Kconfig"
  186. source "kernel/Kconfig.freezer"
  187. menu "System Type"
  188. config MMU
  189. bool "MMU-based Paged Memory Management Support"
  190. default y
  191. help
  192. Select if you want MMU-based virtualised addressing space
  193. support by paged memory management. If unsure, say 'Y'.
  194. #
  195. # The "ARM system type" choice list is ordered alphabetically by option
  196. # text. Please add new entries in the option alphabetic order.
  197. #
  198. choice
  199. prompt "ARM system type"
  200. default ARCH_VERSATILE
  201. config ARCH_INTEGRATOR
  202. bool "ARM Ltd. Integrator family"
  203. select ARM_AMBA
  204. select ARCH_HAS_CPUFREQ
  205. select CLKDEV_LOOKUP
  206. select HAVE_MACH_CLKDEV
  207. select HAVE_TCM
  208. select ICST
  209. select GENERIC_CLOCKEVENTS
  210. select PLAT_VERSATILE
  211. select PLAT_VERSATILE_FPGA_IRQ
  212. select NEED_MACH_MEMORY_H
  213. help
  214. Support for ARM's Integrator platform.
  215. config ARCH_REALVIEW
  216. bool "ARM Ltd. RealView family"
  217. select ARM_AMBA
  218. select CLKDEV_LOOKUP
  219. select HAVE_MACH_CLKDEV
  220. select ICST
  221. select GENERIC_CLOCKEVENTS
  222. select ARCH_WANT_OPTIONAL_GPIOLIB
  223. select PLAT_VERSATILE
  224. select PLAT_VERSATILE_CLCD
  225. select ARM_TIMER_SP804
  226. select GPIO_PL061 if GPIOLIB
  227. select NEED_MACH_MEMORY_H
  228. help
  229. This enables support for ARM Ltd RealView boards.
  230. config ARCH_VERSATILE
  231. bool "ARM Ltd. Versatile family"
  232. select ARM_AMBA
  233. select ARM_VIC
  234. select CLKDEV_LOOKUP
  235. select HAVE_MACH_CLKDEV
  236. select ICST
  237. select GENERIC_CLOCKEVENTS
  238. select ARCH_WANT_OPTIONAL_GPIOLIB
  239. select PLAT_VERSATILE
  240. select PLAT_VERSATILE_CLCD
  241. select PLAT_VERSATILE_FPGA_IRQ
  242. select ARM_TIMER_SP804
  243. help
  244. This enables support for ARM Ltd Versatile board.
  245. config ARCH_VEXPRESS
  246. bool "ARM Ltd. Versatile Express family"
  247. select ARCH_WANT_OPTIONAL_GPIOLIB
  248. select ARM_AMBA
  249. select ARM_TIMER_SP804
  250. select CLKDEV_LOOKUP
  251. select HAVE_MACH_CLKDEV
  252. select GENERIC_CLOCKEVENTS
  253. select HAVE_CLK
  254. select HAVE_PATA_PLATFORM
  255. select ICST
  256. select PLAT_VERSATILE
  257. select PLAT_VERSATILE_CLCD
  258. help
  259. This enables support for the ARM Ltd Versatile Express boards.
  260. config ARCH_AT91
  261. bool "Atmel AT91"
  262. select ARCH_REQUIRE_GPIOLIB
  263. select HAVE_CLK
  264. select CLKDEV_LOOKUP
  265. help
  266. This enables support for systems based on the Atmel AT91RM9200,
  267. AT91SAM9 and AT91CAP9 processors.
  268. config ARCH_BCMRING
  269. bool "Broadcom BCMRING"
  270. depends on MMU
  271. select CPU_V6
  272. select ARM_AMBA
  273. select ARM_TIMER_SP804
  274. select CLKDEV_LOOKUP
  275. select GENERIC_CLOCKEVENTS
  276. select ARCH_WANT_OPTIONAL_GPIOLIB
  277. help
  278. Support for Broadcom's BCMRing platform.
  279. config ARCH_HIGHBANK
  280. bool "Calxeda Highbank-based"
  281. select ARCH_WANT_OPTIONAL_GPIOLIB
  282. select ARM_AMBA
  283. select ARM_GIC
  284. select ARM_TIMER_SP804
  285. select CLKDEV_LOOKUP
  286. select CPU_V7
  287. select GENERIC_CLOCKEVENTS
  288. select HAVE_ARM_SCU
  289. select USE_OF
  290. help
  291. Support for the Calxeda Highbank SoC based boards.
  292. config ARCH_CLPS711X
  293. bool "Cirrus Logic CLPS711x/EP721x-based"
  294. select CPU_ARM720T
  295. select ARCH_USES_GETTIMEOFFSET
  296. select NEED_MACH_MEMORY_H
  297. help
  298. Support for Cirrus Logic 711x/721x based boards.
  299. config ARCH_CNS3XXX
  300. bool "Cavium Networks CNS3XXX family"
  301. select CPU_V6K
  302. select GENERIC_CLOCKEVENTS
  303. select ARM_GIC
  304. select MIGHT_HAVE_PCI
  305. select PCI_DOMAINS if PCI
  306. help
  307. Support for Cavium Networks CNS3XXX platform.
  308. config ARCH_GEMINI
  309. bool "Cortina Systems Gemini"
  310. select CPU_FA526
  311. select ARCH_REQUIRE_GPIOLIB
  312. select ARCH_USES_GETTIMEOFFSET
  313. help
  314. Support for the Cortina Systems Gemini family SoCs
  315. config ARCH_PRIMA2
  316. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  317. select CPU_V7
  318. select NO_IOPORT
  319. select GENERIC_CLOCKEVENTS
  320. select CLKDEV_LOOKUP
  321. select GENERIC_IRQ_CHIP
  322. select USE_OF
  323. select ZONE_DMA
  324. help
  325. Support for CSR SiRFSoC ARM Cortex A9 Platform
  326. config ARCH_EBSA110
  327. bool "EBSA-110"
  328. select CPU_SA110
  329. select ISA
  330. select NO_IOPORT
  331. select ARCH_USES_GETTIMEOFFSET
  332. select NEED_MACH_MEMORY_H
  333. help
  334. This is an evaluation board for the StrongARM processor available
  335. from Digital. It has limited hardware on-board, including an
  336. Ethernet interface, two PCMCIA sockets, two serial ports and a
  337. parallel port.
  338. config ARCH_EP93XX
  339. bool "EP93xx-based"
  340. select CPU_ARM920T
  341. select ARM_AMBA
  342. select ARM_VIC
  343. select CLKDEV_LOOKUP
  344. select ARCH_REQUIRE_GPIOLIB
  345. select ARCH_HAS_HOLES_MEMORYMODEL
  346. select ARCH_USES_GETTIMEOFFSET
  347. select NEED_MACH_MEMORY_H
  348. help
  349. This enables support for the Cirrus EP93xx series of CPUs.
  350. config ARCH_FOOTBRIDGE
  351. bool "FootBridge"
  352. select CPU_SA110
  353. select FOOTBRIDGE
  354. select GENERIC_CLOCKEVENTS
  355. select HAVE_IDE
  356. select NEED_MACH_MEMORY_H
  357. help
  358. Support for systems based on the DC21285 companion chip
  359. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  360. config ARCH_MXC
  361. bool "Freescale MXC/iMX-based"
  362. select GENERIC_CLOCKEVENTS
  363. select ARCH_REQUIRE_GPIOLIB
  364. select CLKDEV_LOOKUP
  365. select CLKSRC_MMIO
  366. select GENERIC_IRQ_CHIP
  367. select HAVE_SCHED_CLOCK
  368. select MULTI_IRQ_HANDLER
  369. help
  370. Support for Freescale MXC/iMX-based family of processors
  371. config ARCH_MXS
  372. bool "Freescale MXS-based"
  373. select GENERIC_CLOCKEVENTS
  374. select ARCH_REQUIRE_GPIOLIB
  375. select CLKDEV_LOOKUP
  376. select CLKSRC_MMIO
  377. help
  378. Support for Freescale MXS-based family of processors
  379. config ARCH_NETX
  380. bool "Hilscher NetX based"
  381. select CLKSRC_MMIO
  382. select CPU_ARM926T
  383. select ARM_VIC
  384. select GENERIC_CLOCKEVENTS
  385. help
  386. This enables support for systems based on the Hilscher NetX Soc
  387. config ARCH_H720X
  388. bool "Hynix HMS720x-based"
  389. select CPU_ARM720T
  390. select ISA_DMA_API
  391. select ARCH_USES_GETTIMEOFFSET
  392. help
  393. This enables support for systems based on the Hynix HMS720x
  394. config ARCH_IOP13XX
  395. bool "IOP13xx-based"
  396. depends on MMU
  397. select CPU_XSC3
  398. select PLAT_IOP
  399. select PCI
  400. select ARCH_SUPPORTS_MSI
  401. select VMSPLIT_1G
  402. select NEED_MACH_MEMORY_H
  403. help
  404. Support for Intel's IOP13XX (XScale) family of processors.
  405. config ARCH_IOP32X
  406. bool "IOP32x-based"
  407. depends on MMU
  408. select CPU_XSCALE
  409. select PLAT_IOP
  410. select PCI
  411. select ARCH_REQUIRE_GPIOLIB
  412. help
  413. Support for Intel's 80219 and IOP32X (XScale) family of
  414. processors.
  415. config ARCH_IOP33X
  416. bool "IOP33x-based"
  417. depends on MMU
  418. select CPU_XSCALE
  419. select PLAT_IOP
  420. select PCI
  421. select ARCH_REQUIRE_GPIOLIB
  422. help
  423. Support for Intel's IOP33X (XScale) family of processors.
  424. config ARCH_IXP23XX
  425. bool "IXP23XX-based"
  426. depends on MMU
  427. select CPU_XSC3
  428. select PCI
  429. select ARCH_USES_GETTIMEOFFSET
  430. select NEED_MACH_MEMORY_H
  431. help
  432. Support for Intel's IXP23xx (XScale) family of processors.
  433. config ARCH_IXP2000
  434. bool "IXP2400/2800-based"
  435. depends on MMU
  436. select CPU_XSCALE
  437. select PCI
  438. select ARCH_USES_GETTIMEOFFSET
  439. select NEED_MACH_MEMORY_H
  440. help
  441. Support for Intel's IXP2400/2800 (XScale) family of processors.
  442. config ARCH_IXP4XX
  443. bool "IXP4xx-based"
  444. depends on MMU
  445. select CLKSRC_MMIO
  446. select CPU_XSCALE
  447. select GENERIC_GPIO
  448. select GENERIC_CLOCKEVENTS
  449. select HAVE_SCHED_CLOCK
  450. select MIGHT_HAVE_PCI
  451. select DMABOUNCE if PCI
  452. help
  453. Support for Intel's IXP4XX (XScale) family of processors.
  454. config ARCH_DOVE
  455. bool "Marvell Dove"
  456. select CPU_V7
  457. select PCI
  458. select ARCH_REQUIRE_GPIOLIB
  459. select GENERIC_CLOCKEVENTS
  460. select PLAT_ORION
  461. help
  462. Support for the Marvell Dove SoC 88AP510
  463. config ARCH_KIRKWOOD
  464. bool "Marvell Kirkwood"
  465. select CPU_FEROCEON
  466. select PCI
  467. select ARCH_REQUIRE_GPIOLIB
  468. select GENERIC_CLOCKEVENTS
  469. select PLAT_ORION
  470. help
  471. Support for the following Marvell Kirkwood series SoCs:
  472. 88F6180, 88F6192 and 88F6281.
  473. config ARCH_LPC32XX
  474. bool "NXP LPC32XX"
  475. select CLKSRC_MMIO
  476. select CPU_ARM926T
  477. select ARCH_REQUIRE_GPIOLIB
  478. select HAVE_IDE
  479. select ARM_AMBA
  480. select USB_ARCH_HAS_OHCI
  481. select CLKDEV_LOOKUP
  482. select GENERIC_CLOCKEVENTS
  483. help
  484. Support for the NXP LPC32XX family of processors
  485. config ARCH_MV78XX0
  486. bool "Marvell MV78xx0"
  487. select CPU_FEROCEON
  488. select PCI
  489. select ARCH_REQUIRE_GPIOLIB
  490. select GENERIC_CLOCKEVENTS
  491. select PLAT_ORION
  492. help
  493. Support for the following Marvell MV78xx0 series SoCs:
  494. MV781x0, MV782x0.
  495. config ARCH_ORION5X
  496. bool "Marvell Orion"
  497. depends on MMU
  498. select CPU_FEROCEON
  499. select PCI
  500. select ARCH_REQUIRE_GPIOLIB
  501. select GENERIC_CLOCKEVENTS
  502. select PLAT_ORION
  503. help
  504. Support for the following Marvell Orion 5x series SoCs:
  505. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  506. Orion-2 (5281), Orion-1-90 (6183).
  507. config ARCH_MMP
  508. bool "Marvell PXA168/910/MMP2"
  509. depends on MMU
  510. select ARCH_REQUIRE_GPIOLIB
  511. select CLKDEV_LOOKUP
  512. select GENERIC_CLOCKEVENTS
  513. select HAVE_SCHED_CLOCK
  514. select TICK_ONESHOT
  515. select PLAT_PXA
  516. select SPARSE_IRQ
  517. select GENERIC_ALLOCATOR
  518. help
  519. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  520. config ARCH_KS8695
  521. bool "Micrel/Kendin KS8695"
  522. select CPU_ARM922T
  523. select ARCH_REQUIRE_GPIOLIB
  524. select ARCH_USES_GETTIMEOFFSET
  525. select NEED_MACH_MEMORY_H
  526. help
  527. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  528. System-on-Chip devices.
  529. config ARCH_W90X900
  530. bool "Nuvoton W90X900 CPU"
  531. select CPU_ARM926T
  532. select ARCH_REQUIRE_GPIOLIB
  533. select CLKDEV_LOOKUP
  534. select CLKSRC_MMIO
  535. select GENERIC_CLOCKEVENTS
  536. help
  537. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  538. At present, the w90x900 has been renamed nuc900, regarding
  539. the ARM series product line, you can login the following
  540. link address to know more.
  541. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  542. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  543. config ARCH_TEGRA
  544. bool "NVIDIA Tegra"
  545. select CLKDEV_LOOKUP
  546. select CLKSRC_MMIO
  547. select GENERIC_CLOCKEVENTS
  548. select GENERIC_GPIO
  549. select HAVE_CLK
  550. select HAVE_SCHED_CLOCK
  551. select ARCH_HAS_CPUFREQ
  552. help
  553. This enables support for NVIDIA Tegra based systems (Tegra APX,
  554. Tegra 6xx and Tegra 2 series).
  555. config ARCH_PICOXCELL
  556. bool "Picochip picoXcell"
  557. select ARCH_REQUIRE_GPIOLIB
  558. select ARM_PATCH_PHYS_VIRT
  559. select ARM_VIC
  560. select CPU_V6K
  561. select DW_APB_TIMER
  562. select GENERIC_CLOCKEVENTS
  563. select GENERIC_GPIO
  564. select HAVE_SCHED_CLOCK
  565. select HAVE_TCM
  566. select NO_IOPORT
  567. select USE_OF
  568. help
  569. This enables support for systems based on the Picochip picoXcell
  570. family of Femtocell devices. The picoxcell support requires device tree
  571. for all boards.
  572. config ARCH_PNX4008
  573. bool "Philips Nexperia PNX4008 Mobile"
  574. select CPU_ARM926T
  575. select CLKDEV_LOOKUP
  576. select ARCH_USES_GETTIMEOFFSET
  577. help
  578. This enables support for Philips PNX4008 mobile platform.
  579. config ARCH_PXA
  580. bool "PXA2xx/PXA3xx-based"
  581. depends on MMU
  582. select ARCH_MTD_XIP
  583. select ARCH_HAS_CPUFREQ
  584. select CLKDEV_LOOKUP
  585. select CLKSRC_MMIO
  586. select ARCH_REQUIRE_GPIOLIB
  587. select GENERIC_CLOCKEVENTS
  588. select HAVE_SCHED_CLOCK
  589. select TICK_ONESHOT
  590. select PLAT_PXA
  591. select SPARSE_IRQ
  592. select AUTO_ZRELADDR
  593. select MULTI_IRQ_HANDLER
  594. select ARM_CPU_SUSPEND if PM
  595. select HAVE_IDE
  596. help
  597. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  598. config ARCH_MSM
  599. bool "Qualcomm MSM"
  600. select HAVE_CLK
  601. select GENERIC_CLOCKEVENTS
  602. select ARCH_REQUIRE_GPIOLIB
  603. select CLKDEV_LOOKUP
  604. help
  605. Support for Qualcomm MSM/QSD based systems. This runs on the
  606. apps processor of the MSM/QSD and depends on a shared memory
  607. interface to the modem processor which runs the baseband
  608. stack and controls some vital subsystems
  609. (clock and power control, etc).
  610. config ARCH_SHMOBILE
  611. bool "Renesas SH-Mobile / R-Mobile"
  612. select HAVE_CLK
  613. select CLKDEV_LOOKUP
  614. select HAVE_MACH_CLKDEV
  615. select GENERIC_CLOCKEVENTS
  616. select NO_IOPORT
  617. select SPARSE_IRQ
  618. select MULTI_IRQ_HANDLER
  619. select PM_GENERIC_DOMAINS if PM
  620. select NEED_MACH_MEMORY_H
  621. help
  622. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  623. config ARCH_RPC
  624. bool "RiscPC"
  625. select ARCH_ACORN
  626. select FIQ
  627. select TIMER_ACORN
  628. select ARCH_MAY_HAVE_PC_FDC
  629. select HAVE_PATA_PLATFORM
  630. select ISA_DMA_API
  631. select NO_IOPORT
  632. select ARCH_SPARSEMEM_ENABLE
  633. select ARCH_USES_GETTIMEOFFSET
  634. select HAVE_IDE
  635. select NEED_MACH_MEMORY_H
  636. help
  637. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  638. CD-ROM interface, serial and parallel port, and the floppy drive.
  639. config ARCH_SA1100
  640. bool "SA1100-based"
  641. select CLKSRC_MMIO
  642. select CPU_SA1100
  643. select ISA
  644. select ARCH_SPARSEMEM_ENABLE
  645. select ARCH_MTD_XIP
  646. select ARCH_HAS_CPUFREQ
  647. select CPU_FREQ
  648. select GENERIC_CLOCKEVENTS
  649. select HAVE_CLK
  650. select HAVE_SCHED_CLOCK
  651. select TICK_ONESHOT
  652. select ARCH_REQUIRE_GPIOLIB
  653. select HAVE_IDE
  654. select NEED_MACH_MEMORY_H
  655. help
  656. Support for StrongARM 11x0 based boards.
  657. config ARCH_S3C2410
  658. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  659. select GENERIC_GPIO
  660. select ARCH_HAS_CPUFREQ
  661. select HAVE_CLK
  662. select CLKDEV_LOOKUP
  663. select ARCH_USES_GETTIMEOFFSET
  664. select HAVE_S3C2410_I2C if I2C
  665. help
  666. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  667. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  668. the Samsung SMDK2410 development board (and derivatives).
  669. Note, the S3C2416 and the S3C2450 are so close that they even share
  670. the same SoC ID code. This means that there is no separate machine
  671. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  672. config ARCH_S3C64XX
  673. bool "Samsung S3C64XX"
  674. select PLAT_SAMSUNG
  675. select CPU_V6
  676. select ARM_VIC
  677. select HAVE_CLK
  678. select HAVE_TCM
  679. select CLKDEV_LOOKUP
  680. select NO_IOPORT
  681. select ARCH_USES_GETTIMEOFFSET
  682. select ARCH_HAS_CPUFREQ
  683. select ARCH_REQUIRE_GPIOLIB
  684. select SAMSUNG_CLKSRC
  685. select SAMSUNG_IRQ_VIC_TIMER
  686. select S3C_GPIO_TRACK
  687. select S3C_DEV_NAND
  688. select USB_ARCH_HAS_OHCI
  689. select SAMSUNG_GPIOLIB_4BIT
  690. select HAVE_S3C2410_I2C if I2C
  691. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  692. help
  693. Samsung S3C64XX series based systems
  694. config ARCH_S5P64X0
  695. bool "Samsung S5P6440 S5P6450"
  696. select CPU_V6
  697. select GENERIC_GPIO
  698. select HAVE_CLK
  699. select CLKDEV_LOOKUP
  700. select CLKSRC_MMIO
  701. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  702. select GENERIC_CLOCKEVENTS
  703. select HAVE_SCHED_CLOCK
  704. select HAVE_S3C2410_I2C if I2C
  705. select HAVE_S3C_RTC if RTC_CLASS
  706. help
  707. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  708. SMDK6450.
  709. config ARCH_S5PC100
  710. bool "Samsung S5PC100"
  711. select GENERIC_GPIO
  712. select HAVE_CLK
  713. select CLKDEV_LOOKUP
  714. select CPU_V7
  715. select ARM_L1_CACHE_SHIFT_6
  716. select ARCH_USES_GETTIMEOFFSET
  717. select HAVE_S3C2410_I2C if I2C
  718. select HAVE_S3C_RTC if RTC_CLASS
  719. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  720. help
  721. Samsung S5PC100 series based systems
  722. config ARCH_S5PV210
  723. bool "Samsung S5PV210/S5PC110"
  724. select CPU_V7
  725. select ARCH_SPARSEMEM_ENABLE
  726. select ARCH_HAS_HOLES_MEMORYMODEL
  727. select GENERIC_GPIO
  728. select HAVE_CLK
  729. select CLKDEV_LOOKUP
  730. select CLKSRC_MMIO
  731. select ARM_L1_CACHE_SHIFT_6
  732. select ARCH_HAS_CPUFREQ
  733. select GENERIC_CLOCKEVENTS
  734. select HAVE_SCHED_CLOCK
  735. select HAVE_S3C2410_I2C if I2C
  736. select HAVE_S3C_RTC if RTC_CLASS
  737. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  738. select NEED_MACH_MEMORY_H
  739. help
  740. Samsung S5PV210/S5PC110 series based systems
  741. config ARCH_EXYNOS
  742. bool "SAMSUNG EXYNOS"
  743. select CPU_V7
  744. select ARCH_SPARSEMEM_ENABLE
  745. select ARCH_HAS_HOLES_MEMORYMODEL
  746. select GENERIC_GPIO
  747. select HAVE_CLK
  748. select CLKDEV_LOOKUP
  749. select ARCH_HAS_CPUFREQ
  750. select GENERIC_CLOCKEVENTS
  751. select HAVE_S3C_RTC if RTC_CLASS
  752. select HAVE_S3C2410_I2C if I2C
  753. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  754. select NEED_MACH_MEMORY_H
  755. help
  756. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  757. config ARCH_SHARK
  758. bool "Shark"
  759. select CPU_SA110
  760. select ISA
  761. select ISA_DMA
  762. select ZONE_DMA
  763. select PCI
  764. select ARCH_USES_GETTIMEOFFSET
  765. select NEED_MACH_MEMORY_H
  766. help
  767. Support for the StrongARM based Digital DNARD machine, also known
  768. as "Shark" (<http://www.shark-linux.de/shark.html>).
  769. config ARCH_TCC_926
  770. bool "Telechips TCC ARM926-based systems"
  771. select CLKSRC_MMIO
  772. select CPU_ARM926T
  773. select HAVE_CLK
  774. select CLKDEV_LOOKUP
  775. select GENERIC_CLOCKEVENTS
  776. help
  777. Support for Telechips TCC ARM926-based systems.
  778. config ARCH_U300
  779. bool "ST-Ericsson U300 Series"
  780. depends on MMU
  781. select CLKSRC_MMIO
  782. select CPU_ARM926T
  783. select HAVE_SCHED_CLOCK
  784. select HAVE_TCM
  785. select ARM_AMBA
  786. select ARM_PATCH_PHYS_VIRT
  787. select ARM_VIC
  788. select GENERIC_CLOCKEVENTS
  789. select CLKDEV_LOOKUP
  790. select HAVE_MACH_CLKDEV
  791. select GENERIC_GPIO
  792. select ARCH_REQUIRE_GPIOLIB
  793. select NEED_MACH_MEMORY_H
  794. help
  795. Support for ST-Ericsson U300 series mobile platforms.
  796. config ARCH_U8500
  797. bool "ST-Ericsson U8500 Series"
  798. select CPU_V7
  799. select ARM_AMBA
  800. select GENERIC_CLOCKEVENTS
  801. select CLKDEV_LOOKUP
  802. select ARCH_REQUIRE_GPIOLIB
  803. select ARCH_HAS_CPUFREQ
  804. help
  805. Support for ST-Ericsson's Ux500 architecture
  806. config ARCH_NOMADIK
  807. bool "STMicroelectronics Nomadik"
  808. select ARM_AMBA
  809. select ARM_VIC
  810. select CPU_ARM926T
  811. select CLKDEV_LOOKUP
  812. select GENERIC_CLOCKEVENTS
  813. select ARCH_REQUIRE_GPIOLIB
  814. help
  815. Support for the Nomadik platform by ST-Ericsson
  816. config ARCH_DAVINCI
  817. bool "TI DaVinci"
  818. select GENERIC_CLOCKEVENTS
  819. select ARCH_REQUIRE_GPIOLIB
  820. select ZONE_DMA
  821. select HAVE_IDE
  822. select CLKDEV_LOOKUP
  823. select GENERIC_ALLOCATOR
  824. select GENERIC_IRQ_CHIP
  825. select ARCH_HAS_HOLES_MEMORYMODEL
  826. help
  827. Support for TI's DaVinci platform.
  828. config ARCH_OMAP
  829. bool "TI OMAP"
  830. select HAVE_CLK
  831. select ARCH_REQUIRE_GPIOLIB
  832. select ARCH_HAS_CPUFREQ
  833. select CLKSRC_MMIO
  834. select GENERIC_CLOCKEVENTS
  835. select HAVE_SCHED_CLOCK
  836. select ARCH_HAS_HOLES_MEMORYMODEL
  837. help
  838. Support for TI's OMAP platform (OMAP1/2/3/4).
  839. config PLAT_SPEAR
  840. bool "ST SPEAr"
  841. select ARM_AMBA
  842. select ARCH_REQUIRE_GPIOLIB
  843. select CLKDEV_LOOKUP
  844. select CLKSRC_MMIO
  845. select GENERIC_CLOCKEVENTS
  846. select HAVE_CLK
  847. help
  848. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  849. config ARCH_VT8500
  850. bool "VIA/WonderMedia 85xx"
  851. select CPU_ARM926T
  852. select GENERIC_GPIO
  853. select ARCH_HAS_CPUFREQ
  854. select GENERIC_CLOCKEVENTS
  855. select ARCH_REQUIRE_GPIOLIB
  856. select HAVE_PWM
  857. help
  858. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  859. config ARCH_ZYNQ
  860. bool "Xilinx Zynq ARM Cortex A9 Platform"
  861. select CPU_V7
  862. select GENERIC_CLOCKEVENTS
  863. select CLKDEV_LOOKUP
  864. select ARM_GIC
  865. select ARM_AMBA
  866. select ICST
  867. select USE_OF
  868. help
  869. Support for Xilinx Zynq ARM Cortex A9 Platform
  870. endchoice
  871. #
  872. # This is sorted alphabetically by mach-* pathname. However, plat-*
  873. # Kconfigs may be included either alphabetically (according to the
  874. # plat- suffix) or along side the corresponding mach-* source.
  875. #
  876. source "arch/arm/mach-at91/Kconfig"
  877. source "arch/arm/mach-bcmring/Kconfig"
  878. source "arch/arm/mach-clps711x/Kconfig"
  879. source "arch/arm/mach-cns3xxx/Kconfig"
  880. source "arch/arm/mach-davinci/Kconfig"
  881. source "arch/arm/mach-dove/Kconfig"
  882. source "arch/arm/mach-ep93xx/Kconfig"
  883. source "arch/arm/mach-footbridge/Kconfig"
  884. source "arch/arm/mach-gemini/Kconfig"
  885. source "arch/arm/mach-h720x/Kconfig"
  886. source "arch/arm/mach-integrator/Kconfig"
  887. source "arch/arm/mach-iop32x/Kconfig"
  888. source "arch/arm/mach-iop33x/Kconfig"
  889. source "arch/arm/mach-iop13xx/Kconfig"
  890. source "arch/arm/mach-ixp4xx/Kconfig"
  891. source "arch/arm/mach-ixp2000/Kconfig"
  892. source "arch/arm/mach-ixp23xx/Kconfig"
  893. source "arch/arm/mach-kirkwood/Kconfig"
  894. source "arch/arm/mach-ks8695/Kconfig"
  895. source "arch/arm/mach-lpc32xx/Kconfig"
  896. source "arch/arm/mach-msm/Kconfig"
  897. source "arch/arm/mach-mv78xx0/Kconfig"
  898. source "arch/arm/plat-mxc/Kconfig"
  899. source "arch/arm/mach-mxs/Kconfig"
  900. source "arch/arm/mach-netx/Kconfig"
  901. source "arch/arm/mach-nomadik/Kconfig"
  902. source "arch/arm/plat-nomadik/Kconfig"
  903. source "arch/arm/plat-omap/Kconfig"
  904. source "arch/arm/mach-omap1/Kconfig"
  905. source "arch/arm/mach-omap2/Kconfig"
  906. source "arch/arm/mach-orion5x/Kconfig"
  907. source "arch/arm/mach-pxa/Kconfig"
  908. source "arch/arm/plat-pxa/Kconfig"
  909. source "arch/arm/mach-mmp/Kconfig"
  910. source "arch/arm/mach-realview/Kconfig"
  911. source "arch/arm/mach-sa1100/Kconfig"
  912. source "arch/arm/plat-samsung/Kconfig"
  913. source "arch/arm/plat-s3c24xx/Kconfig"
  914. source "arch/arm/plat-s5p/Kconfig"
  915. source "arch/arm/plat-spear/Kconfig"
  916. source "arch/arm/plat-tcc/Kconfig"
  917. if ARCH_S3C2410
  918. source "arch/arm/mach-s3c2410/Kconfig"
  919. source "arch/arm/mach-s3c2412/Kconfig"
  920. source "arch/arm/mach-s3c2416/Kconfig"
  921. source "arch/arm/mach-s3c2440/Kconfig"
  922. source "arch/arm/mach-s3c2443/Kconfig"
  923. endif
  924. if ARCH_S3C64XX
  925. source "arch/arm/mach-s3c64xx/Kconfig"
  926. endif
  927. source "arch/arm/mach-s5p64x0/Kconfig"
  928. source "arch/arm/mach-s5pc100/Kconfig"
  929. source "arch/arm/mach-s5pv210/Kconfig"
  930. source "arch/arm/mach-exynos/Kconfig"
  931. source "arch/arm/mach-shmobile/Kconfig"
  932. source "arch/arm/mach-tegra/Kconfig"
  933. source "arch/arm/mach-u300/Kconfig"
  934. source "arch/arm/mach-ux500/Kconfig"
  935. source "arch/arm/mach-versatile/Kconfig"
  936. source "arch/arm/mach-vexpress/Kconfig"
  937. source "arch/arm/plat-versatile/Kconfig"
  938. source "arch/arm/mach-vt8500/Kconfig"
  939. source "arch/arm/mach-w90x900/Kconfig"
  940. # Definitions to make life easier
  941. config ARCH_ACORN
  942. bool
  943. config PLAT_IOP
  944. bool
  945. select GENERIC_CLOCKEVENTS
  946. select HAVE_SCHED_CLOCK
  947. config PLAT_ORION
  948. bool
  949. select CLKSRC_MMIO
  950. select GENERIC_IRQ_CHIP
  951. select HAVE_SCHED_CLOCK
  952. config PLAT_PXA
  953. bool
  954. config PLAT_VERSATILE
  955. bool
  956. config ARM_TIMER_SP804
  957. bool
  958. select CLKSRC_MMIO
  959. source arch/arm/mm/Kconfig
  960. config ARM_NR_BANKS
  961. int
  962. default 16 if ARCH_EP93XX
  963. default 8
  964. config IWMMXT
  965. bool "Enable iWMMXt support"
  966. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  967. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  968. help
  969. Enable support for iWMMXt context switching at run time if
  970. running on a CPU that supports it.
  971. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  972. config XSCALE_PMU
  973. bool
  974. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  975. default y
  976. config CPU_HAS_PMU
  977. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  978. (!ARCH_OMAP3 || OMAP3_EMU)
  979. default y
  980. bool
  981. config MULTI_IRQ_HANDLER
  982. bool
  983. help
  984. Allow each machine to specify it's own IRQ handler at run time.
  985. if !MMU
  986. source "arch/arm/Kconfig-nommu"
  987. endif
  988. config ARM_ERRATA_411920
  989. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  990. depends on CPU_V6 || CPU_V6K
  991. help
  992. Invalidation of the Instruction Cache operation can
  993. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  994. It does not affect the MPCore. This option enables the ARM Ltd.
  995. recommended workaround.
  996. config ARM_ERRATA_430973
  997. bool "ARM errata: Stale prediction on replaced interworking branch"
  998. depends on CPU_V7
  999. help
  1000. This option enables the workaround for the 430973 Cortex-A8
  1001. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1002. interworking branch is replaced with another code sequence at the
  1003. same virtual address, whether due to self-modifying code or virtual
  1004. to physical address re-mapping, Cortex-A8 does not recover from the
  1005. stale interworking branch prediction. This results in Cortex-A8
  1006. executing the new code sequence in the incorrect ARM or Thumb state.
  1007. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1008. and also flushes the branch target cache at every context switch.
  1009. Note that setting specific bits in the ACTLR register may not be
  1010. available in non-secure mode.
  1011. config ARM_ERRATA_458693
  1012. bool "ARM errata: Processor deadlock when a false hazard is created"
  1013. depends on CPU_V7
  1014. help
  1015. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1016. erratum. For very specific sequences of memory operations, it is
  1017. possible for a hazard condition intended for a cache line to instead
  1018. be incorrectly associated with a different cache line. This false
  1019. hazard might then cause a processor deadlock. The workaround enables
  1020. the L1 caching of the NEON accesses and disables the PLD instruction
  1021. in the ACTLR register. Note that setting specific bits in the ACTLR
  1022. register may not be available in non-secure mode.
  1023. config ARM_ERRATA_460075
  1024. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1025. depends on CPU_V7
  1026. help
  1027. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1028. erratum. Any asynchronous access to the L2 cache may encounter a
  1029. situation in which recent store transactions to the L2 cache are lost
  1030. and overwritten with stale memory contents from external memory. The
  1031. workaround disables the write-allocate mode for the L2 cache via the
  1032. ACTLR register. Note that setting specific bits in the ACTLR register
  1033. may not be available in non-secure mode.
  1034. config ARM_ERRATA_742230
  1035. bool "ARM errata: DMB operation may be faulty"
  1036. depends on CPU_V7 && SMP
  1037. help
  1038. This option enables the workaround for the 742230 Cortex-A9
  1039. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1040. between two write operations may not ensure the correct visibility
  1041. ordering of the two writes. This workaround sets a specific bit in
  1042. the diagnostic register of the Cortex-A9 which causes the DMB
  1043. instruction to behave as a DSB, ensuring the correct behaviour of
  1044. the two writes.
  1045. config ARM_ERRATA_742231
  1046. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1047. depends on CPU_V7 && SMP
  1048. help
  1049. This option enables the workaround for the 742231 Cortex-A9
  1050. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1051. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1052. accessing some data located in the same cache line, may get corrupted
  1053. data due to bad handling of the address hazard when the line gets
  1054. replaced from one of the CPUs at the same time as another CPU is
  1055. accessing it. This workaround sets specific bits in the diagnostic
  1056. register of the Cortex-A9 which reduces the linefill issuing
  1057. capabilities of the processor.
  1058. config PL310_ERRATA_588369
  1059. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1060. depends on CACHE_L2X0
  1061. help
  1062. The PL310 L2 cache controller implements three types of Clean &
  1063. Invalidate maintenance operations: by Physical Address
  1064. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1065. They are architecturally defined to behave as the execution of a
  1066. clean operation followed immediately by an invalidate operation,
  1067. both performing to the same memory location. This functionality
  1068. is not correctly implemented in PL310 as clean lines are not
  1069. invalidated as a result of these operations.
  1070. config ARM_ERRATA_720789
  1071. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1072. depends on CPU_V7 && SMP
  1073. help
  1074. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1075. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1076. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1077. As a consequence of this erratum, some TLB entries which should be
  1078. invalidated are not, resulting in an incoherency in the system page
  1079. tables. The workaround changes the TLB flushing routines to invalidate
  1080. entries regardless of the ASID.
  1081. config PL310_ERRATA_727915
  1082. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1083. depends on CACHE_L2X0
  1084. help
  1085. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1086. operation (offset 0x7FC). This operation runs in background so that
  1087. PL310 can handle normal accesses while it is in progress. Under very
  1088. rare circumstances, due to this erratum, write data can be lost when
  1089. PL310 treats a cacheable write transaction during a Clean &
  1090. Invalidate by Way operation.
  1091. config ARM_ERRATA_743622
  1092. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1093. depends on CPU_V7
  1094. help
  1095. This option enables the workaround for the 743622 Cortex-A9
  1096. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1097. optimisation in the Cortex-A9 Store Buffer may lead to data
  1098. corruption. This workaround sets a specific bit in the diagnostic
  1099. register of the Cortex-A9 which disables the Store Buffer
  1100. optimisation, preventing the defect from occurring. This has no
  1101. visible impact on the overall performance or power consumption of the
  1102. processor.
  1103. config ARM_ERRATA_751472
  1104. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1105. depends on CPU_V7 && SMP
  1106. help
  1107. This option enables the workaround for the 751472 Cortex-A9 (prior
  1108. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1109. completion of a following broadcasted operation if the second
  1110. operation is received by a CPU before the ICIALLUIS has completed,
  1111. potentially leading to corrupted entries in the cache or TLB.
  1112. config PL310_ERRATA_753970
  1113. bool "PL310 errata: cache sync operation may be faulty"
  1114. depends on CACHE_PL310
  1115. help
  1116. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1117. Under some condition the effect of cache sync operation on
  1118. the store buffer still remains when the operation completes.
  1119. This means that the store buffer is always asked to drain and
  1120. this prevents it from merging any further writes. The workaround
  1121. is to replace the normal offset of cache sync operation (0x730)
  1122. by another offset targeting an unmapped PL310 register 0x740.
  1123. This has the same effect as the cache sync operation: store buffer
  1124. drain and waiting for all buffers empty.
  1125. config ARM_ERRATA_754322
  1126. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1127. depends on CPU_V7
  1128. help
  1129. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1130. r3p*) erratum. A speculative memory access may cause a page table walk
  1131. which starts prior to an ASID switch but completes afterwards. This
  1132. can populate the micro-TLB with a stale entry which may be hit with
  1133. the new ASID. This workaround places two dsb instructions in the mm
  1134. switching code so that no page table walks can cross the ASID switch.
  1135. config ARM_ERRATA_754327
  1136. bool "ARM errata: no automatic Store Buffer drain"
  1137. depends on CPU_V7 && SMP
  1138. help
  1139. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1140. r2p0) erratum. The Store Buffer does not have any automatic draining
  1141. mechanism and therefore a livelock may occur if an external agent
  1142. continuously polls a memory location waiting to observe an update.
  1143. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1144. written polling loops from denying visibility of updates to memory.
  1145. config ARM_ERRATA_364296
  1146. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1147. depends on CPU_V6 && !SMP
  1148. help
  1149. This options enables the workaround for the 364296 ARM1136
  1150. r0p2 erratum (possible cache data corruption with
  1151. hit-under-miss enabled). It sets the undocumented bit 31 in
  1152. the auxiliary control register and the FI bit in the control
  1153. register, thus disabling hit-under-miss without putting the
  1154. processor into full low interrupt latency mode. ARM11MPCore
  1155. is not affected.
  1156. config ARM_ERRATA_764369
  1157. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1158. depends on CPU_V7 && SMP
  1159. help
  1160. This option enables the workaround for erratum 764369
  1161. affecting Cortex-A9 MPCore with two or more processors (all
  1162. current revisions). Under certain timing circumstances, a data
  1163. cache line maintenance operation by MVA targeting an Inner
  1164. Shareable memory region may fail to proceed up to either the
  1165. Point of Coherency or to the Point of Unification of the
  1166. system. This workaround adds a DSB instruction before the
  1167. relevant cache maintenance functions and sets a specific bit
  1168. in the diagnostic control register of the SCU.
  1169. config PL310_ERRATA_769419
  1170. bool "PL310 errata: no automatic Store Buffer drain"
  1171. depends on CACHE_L2X0
  1172. help
  1173. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1174. not automatically drain. This can cause normal, non-cacheable
  1175. writes to be retained when the memory system is idle, leading
  1176. to suboptimal I/O performance for drivers using coherent DMA.
  1177. This option adds a write barrier to the cpu_idle loop so that,
  1178. on systems with an outer cache, the store buffer is drained
  1179. explicitly.
  1180. endmenu
  1181. source "arch/arm/common/Kconfig"
  1182. menu "Bus support"
  1183. config ARM_AMBA
  1184. bool
  1185. config ISA
  1186. bool
  1187. help
  1188. Find out whether you have ISA slots on your motherboard. ISA is the
  1189. name of a bus system, i.e. the way the CPU talks to the other stuff
  1190. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1191. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1192. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1193. # Select ISA DMA controller support
  1194. config ISA_DMA
  1195. bool
  1196. select ISA_DMA_API
  1197. # Select ISA DMA interface
  1198. config ISA_DMA_API
  1199. bool
  1200. config PCI
  1201. bool "PCI support" if MIGHT_HAVE_PCI
  1202. help
  1203. Find out whether you have a PCI motherboard. PCI is the name of a
  1204. bus system, i.e. the way the CPU talks to the other stuff inside
  1205. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1206. VESA. If you have PCI, say Y, otherwise N.
  1207. config PCI_DOMAINS
  1208. bool
  1209. depends on PCI
  1210. config PCI_NANOENGINE
  1211. bool "BSE nanoEngine PCI support"
  1212. depends on SA1100_NANOENGINE
  1213. help
  1214. Enable PCI on the BSE nanoEngine board.
  1215. config PCI_SYSCALL
  1216. def_bool PCI
  1217. # Select the host bridge type
  1218. config PCI_HOST_VIA82C505
  1219. bool
  1220. depends on PCI && ARCH_SHARK
  1221. default y
  1222. config PCI_HOST_ITE8152
  1223. bool
  1224. depends on PCI && MACH_ARMCORE
  1225. default y
  1226. select DMABOUNCE
  1227. source "drivers/pci/Kconfig"
  1228. source "drivers/pcmcia/Kconfig"
  1229. endmenu
  1230. menu "Kernel Features"
  1231. source "kernel/time/Kconfig"
  1232. config SMP
  1233. bool "Symmetric Multi-Processing"
  1234. depends on CPU_V6K || CPU_V7
  1235. depends on GENERIC_CLOCKEVENTS
  1236. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1237. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1238. ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
  1239. ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE || ARCH_HIGHBANK || SOC_IMX6Q
  1240. depends on MMU
  1241. select USE_GENERIC_SMP_HELPERS
  1242. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1243. help
  1244. This enables support for systems with more than one CPU. If you have
  1245. a system with only one CPU, like most personal computers, say N. If
  1246. you have a system with more than one CPU, say Y.
  1247. If you say N here, the kernel will run on single and multiprocessor
  1248. machines, but will use only one CPU of a multiprocessor machine. If
  1249. you say Y here, the kernel will run on many, but not all, single
  1250. processor machines. On a single processor machine, the kernel will
  1251. run faster if you say N here.
  1252. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1253. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1254. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1255. If you don't know what to do here, say N.
  1256. config SMP_ON_UP
  1257. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1258. depends on EXPERIMENTAL
  1259. depends on SMP && !XIP_KERNEL
  1260. default y
  1261. help
  1262. SMP kernels contain instructions which fail on non-SMP processors.
  1263. Enabling this option allows the kernel to modify itself to make
  1264. these instructions safe. Disabling it allows about 1K of space
  1265. savings.
  1266. If you don't know what to do here, say Y.
  1267. config ARM_CPU_TOPOLOGY
  1268. bool "Support cpu topology definition"
  1269. depends on SMP && CPU_V7
  1270. default y
  1271. help
  1272. Support ARM cpu topology definition. The MPIDR register defines
  1273. affinity between processors which is then used to describe the cpu
  1274. topology of an ARM System.
  1275. config SCHED_MC
  1276. bool "Multi-core scheduler support"
  1277. depends on ARM_CPU_TOPOLOGY
  1278. help
  1279. Multi-core scheduler support improves the CPU scheduler's decision
  1280. making when dealing with multi-core CPU chips at a cost of slightly
  1281. increased overhead in some places. If unsure say N here.
  1282. config SCHED_SMT
  1283. bool "SMT scheduler support"
  1284. depends on ARM_CPU_TOPOLOGY
  1285. help
  1286. Improves the CPU scheduler's decision making when dealing with
  1287. MultiThreading at a cost of slightly increased overhead in some
  1288. places. If unsure say N here.
  1289. config HAVE_ARM_SCU
  1290. bool
  1291. help
  1292. This option enables support for the ARM system coherency unit
  1293. config HAVE_ARM_TWD
  1294. bool
  1295. depends on SMP
  1296. select TICK_ONESHOT
  1297. help
  1298. This options enables support for the ARM timer and watchdog unit
  1299. choice
  1300. prompt "Memory split"
  1301. default VMSPLIT_3G
  1302. help
  1303. Select the desired split between kernel and user memory.
  1304. If you are not absolutely sure what you are doing, leave this
  1305. option alone!
  1306. config VMSPLIT_3G
  1307. bool "3G/1G user/kernel split"
  1308. config VMSPLIT_2G
  1309. bool "2G/2G user/kernel split"
  1310. config VMSPLIT_1G
  1311. bool "1G/3G user/kernel split"
  1312. endchoice
  1313. config PAGE_OFFSET
  1314. hex
  1315. default 0x40000000 if VMSPLIT_1G
  1316. default 0x80000000 if VMSPLIT_2G
  1317. default 0xC0000000
  1318. config NR_CPUS
  1319. int "Maximum number of CPUs (2-32)"
  1320. range 2 32
  1321. depends on SMP
  1322. default "4"
  1323. config HOTPLUG_CPU
  1324. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1325. depends on SMP && HOTPLUG && EXPERIMENTAL
  1326. help
  1327. Say Y here to experiment with turning CPUs off and on. CPUs
  1328. can be controlled through /sys/devices/system/cpu.
  1329. config LOCAL_TIMERS
  1330. bool "Use local timer interrupts"
  1331. depends on SMP
  1332. default y
  1333. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1334. help
  1335. Enable support for local timers on SMP platforms, rather then the
  1336. legacy IPI broadcast method. Local timers allows the system
  1337. accounting to be spread across the timer interval, preventing a
  1338. "thundering herd" at every timer tick.
  1339. config ARCH_NR_GPIO
  1340. int
  1341. default 1024 if ARCH_TEGRA
  1342. default 0
  1343. help
  1344. Maximum number of GPIOs in the system.
  1345. If unsure, leave the default value.
  1346. source kernel/Kconfig.preempt
  1347. config HZ
  1348. int
  1349. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1350. ARCH_S5PV210 || ARCH_EXYNOS4
  1351. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1352. default AT91_TIMER_HZ if ARCH_AT91
  1353. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1354. default 100
  1355. config THUMB2_KERNEL
  1356. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1357. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1358. select AEABI
  1359. select ARM_ASM_UNIFIED
  1360. select ARM_UNWIND
  1361. help
  1362. By enabling this option, the kernel will be compiled in
  1363. Thumb-2 mode. A compiler/assembler that understand the unified
  1364. ARM-Thumb syntax is needed.
  1365. If unsure, say N.
  1366. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1367. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1368. depends on THUMB2_KERNEL && MODULES
  1369. default y
  1370. help
  1371. Various binutils versions can resolve Thumb-2 branches to
  1372. locally-defined, preemptible global symbols as short-range "b.n"
  1373. branch instructions.
  1374. This is a problem, because there's no guarantee the final
  1375. destination of the symbol, or any candidate locations for a
  1376. trampoline, are within range of the branch. For this reason, the
  1377. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1378. relocation in modules at all, and it makes little sense to add
  1379. support.
  1380. The symptom is that the kernel fails with an "unsupported
  1381. relocation" error when loading some modules.
  1382. Until fixed tools are available, passing
  1383. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1384. code which hits this problem, at the cost of a bit of extra runtime
  1385. stack usage in some cases.
  1386. The problem is described in more detail at:
  1387. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1388. Only Thumb-2 kernels are affected.
  1389. Unless you are sure your tools don't have this problem, say Y.
  1390. config ARM_ASM_UNIFIED
  1391. bool
  1392. config AEABI
  1393. bool "Use the ARM EABI to compile the kernel"
  1394. help
  1395. This option allows for the kernel to be compiled using the latest
  1396. ARM ABI (aka EABI). This is only useful if you are using a user
  1397. space environment that is also compiled with EABI.
  1398. Since there are major incompatibilities between the legacy ABI and
  1399. EABI, especially with regard to structure member alignment, this
  1400. option also changes the kernel syscall calling convention to
  1401. disambiguate both ABIs and allow for backward compatibility support
  1402. (selected with CONFIG_OABI_COMPAT).
  1403. To use this you need GCC version 4.0.0 or later.
  1404. config OABI_COMPAT
  1405. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1406. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1407. default y
  1408. help
  1409. This option preserves the old syscall interface along with the
  1410. new (ARM EABI) one. It also provides a compatibility layer to
  1411. intercept syscalls that have structure arguments which layout
  1412. in memory differs between the legacy ABI and the new ARM EABI
  1413. (only for non "thumb" binaries). This option adds a tiny
  1414. overhead to all syscalls and produces a slightly larger kernel.
  1415. If you know you'll be using only pure EABI user space then you
  1416. can say N here. If this option is not selected and you attempt
  1417. to execute a legacy ABI binary then the result will be
  1418. UNPREDICTABLE (in fact it can be predicted that it won't work
  1419. at all). If in doubt say Y.
  1420. config ARCH_HAS_HOLES_MEMORYMODEL
  1421. bool
  1422. config ARCH_SPARSEMEM_ENABLE
  1423. bool
  1424. config ARCH_SPARSEMEM_DEFAULT
  1425. def_bool ARCH_SPARSEMEM_ENABLE
  1426. config ARCH_SELECT_MEMORY_MODEL
  1427. def_bool ARCH_SPARSEMEM_ENABLE
  1428. config HAVE_ARCH_PFN_VALID
  1429. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1430. config HIGHMEM
  1431. bool "High Memory Support"
  1432. depends on MMU
  1433. help
  1434. The address space of ARM processors is only 4 Gigabytes large
  1435. and it has to accommodate user address space, kernel address
  1436. space as well as some memory mapped IO. That means that, if you
  1437. have a large amount of physical memory and/or IO, not all of the
  1438. memory can be "permanently mapped" by the kernel. The physical
  1439. memory that is not permanently mapped is called "high memory".
  1440. Depending on the selected kernel/user memory split, minimum
  1441. vmalloc space and actual amount of RAM, you may not need this
  1442. option which should result in a slightly faster kernel.
  1443. If unsure, say n.
  1444. config HIGHPTE
  1445. bool "Allocate 2nd-level pagetables from highmem"
  1446. depends on HIGHMEM
  1447. config HW_PERF_EVENTS
  1448. bool "Enable hardware performance counter support for perf events"
  1449. depends on PERF_EVENTS && CPU_HAS_PMU
  1450. default y
  1451. help
  1452. Enable hardware performance counter support for perf events. If
  1453. disabled, perf events will use software events only.
  1454. source "mm/Kconfig"
  1455. config FORCE_MAX_ZONEORDER
  1456. int "Maximum zone order" if ARCH_SHMOBILE
  1457. range 11 64 if ARCH_SHMOBILE
  1458. default "9" if SA1111
  1459. default "11"
  1460. help
  1461. The kernel memory allocator divides physically contiguous memory
  1462. blocks into "zones", where each zone is a power of two number of
  1463. pages. This option selects the largest power of two that the kernel
  1464. keeps in the memory allocator. If you need to allocate very large
  1465. blocks of physically contiguous memory, then you may need to
  1466. increase this value.
  1467. This config option is actually maximum order plus one. For example,
  1468. a value of 11 means that the largest free memory block is 2^10 pages.
  1469. config LEDS
  1470. bool "Timer and CPU usage LEDs"
  1471. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1472. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1473. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1474. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1475. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1476. ARCH_AT91 || ARCH_DAVINCI || \
  1477. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1478. help
  1479. If you say Y here, the LEDs on your machine will be used
  1480. to provide useful information about your current system status.
  1481. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1482. be able to select which LEDs are active using the options below. If
  1483. you are compiling a kernel for the EBSA-110 or the LART however, the
  1484. red LED will simply flash regularly to indicate that the system is
  1485. still functional. It is safe to say Y here if you have a CATS
  1486. system, but the driver will do nothing.
  1487. config LEDS_TIMER
  1488. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1489. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1490. || MACH_OMAP_PERSEUS2
  1491. depends on LEDS
  1492. depends on !GENERIC_CLOCKEVENTS
  1493. default y if ARCH_EBSA110
  1494. help
  1495. If you say Y here, one of the system LEDs (the green one on the
  1496. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1497. will flash regularly to indicate that the system is still
  1498. operational. This is mainly useful to kernel hackers who are
  1499. debugging unstable kernels.
  1500. The LART uses the same LED for both Timer LED and CPU usage LED
  1501. functions. You may choose to use both, but the Timer LED function
  1502. will overrule the CPU usage LED.
  1503. config LEDS_CPU
  1504. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1505. !ARCH_OMAP) \
  1506. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1507. || MACH_OMAP_PERSEUS2
  1508. depends on LEDS
  1509. help
  1510. If you say Y here, the red LED will be used to give a good real
  1511. time indication of CPU usage, by lighting whenever the idle task
  1512. is not currently executing.
  1513. The LART uses the same LED for both Timer LED and CPU usage LED
  1514. functions. You may choose to use both, but the Timer LED function
  1515. will overrule the CPU usage LED.
  1516. config ALIGNMENT_TRAP
  1517. bool
  1518. depends on CPU_CP15_MMU
  1519. default y if !ARCH_EBSA110
  1520. select HAVE_PROC_CPU if PROC_FS
  1521. help
  1522. ARM processors cannot fetch/store information which is not
  1523. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1524. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1525. fetch/store instructions will be emulated in software if you say
  1526. here, which has a severe performance impact. This is necessary for
  1527. correct operation of some network protocols. With an IP-only
  1528. configuration it is safe to say N, otherwise say Y.
  1529. config UACCESS_WITH_MEMCPY
  1530. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1531. depends on MMU && EXPERIMENTAL
  1532. default y if CPU_FEROCEON
  1533. help
  1534. Implement faster copy_to_user and clear_user methods for CPU
  1535. cores where a 8-word STM instruction give significantly higher
  1536. memory write throughput than a sequence of individual 32bit stores.
  1537. A possible side effect is a slight increase in scheduling latency
  1538. between threads sharing the same address space if they invoke
  1539. such copy operations with large buffers.
  1540. However, if the CPU data cache is using a write-allocate mode,
  1541. this option is unlikely to provide any performance gain.
  1542. config SECCOMP
  1543. bool
  1544. prompt "Enable seccomp to safely compute untrusted bytecode"
  1545. ---help---
  1546. This kernel feature is useful for number crunching applications
  1547. that may need to compute untrusted bytecode during their
  1548. execution. By using pipes or other transports made available to
  1549. the process as file descriptors supporting the read/write
  1550. syscalls, it's possible to isolate those applications in
  1551. their own address space using seccomp. Once seccomp is
  1552. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1553. and the task is only allowed to execute a few safe syscalls
  1554. defined by each seccomp mode.
  1555. config CC_STACKPROTECTOR
  1556. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1557. depends on EXPERIMENTAL
  1558. help
  1559. This option turns on the -fstack-protector GCC feature. This
  1560. feature puts, at the beginning of functions, a canary value on
  1561. the stack just before the return address, and validates
  1562. the value just before actually returning. Stack based buffer
  1563. overflows (that need to overwrite this return address) now also
  1564. overwrite the canary, which gets detected and the attack is then
  1565. neutralized via a kernel panic.
  1566. This feature requires gcc version 4.2 or above.
  1567. config DEPRECATED_PARAM_STRUCT
  1568. bool "Provide old way to pass kernel parameters"
  1569. help
  1570. This was deprecated in 2001 and announced to live on for 5 years.
  1571. Some old boot loaders still use this way.
  1572. endmenu
  1573. menu "Boot options"
  1574. config USE_OF
  1575. bool "Flattened Device Tree support"
  1576. select OF
  1577. select OF_EARLY_FLATTREE
  1578. select IRQ_DOMAIN
  1579. help
  1580. Include support for flattened device tree machine descriptions.
  1581. # Compressed boot loader in ROM. Yes, we really want to ask about
  1582. # TEXT and BSS so we preserve their values in the config files.
  1583. config ZBOOT_ROM_TEXT
  1584. hex "Compressed ROM boot loader base address"
  1585. default "0"
  1586. help
  1587. The physical address at which the ROM-able zImage is to be
  1588. placed in the target. Platforms which normally make use of
  1589. ROM-able zImage formats normally set this to a suitable
  1590. value in their defconfig file.
  1591. If ZBOOT_ROM is not enabled, this has no effect.
  1592. config ZBOOT_ROM_BSS
  1593. hex "Compressed ROM boot loader BSS address"
  1594. default "0"
  1595. help
  1596. The base address of an area of read/write memory in the target
  1597. for the ROM-able zImage which must be available while the
  1598. decompressor is running. It must be large enough to hold the
  1599. entire decompressed kernel plus an additional 128 KiB.
  1600. Platforms which normally make use of ROM-able zImage formats
  1601. normally set this to a suitable value in their defconfig file.
  1602. If ZBOOT_ROM is not enabled, this has no effect.
  1603. config ZBOOT_ROM
  1604. bool "Compressed boot loader in ROM/flash"
  1605. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1606. help
  1607. Say Y here if you intend to execute your compressed kernel image
  1608. (zImage) directly from ROM or flash. If unsure, say N.
  1609. choice
  1610. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1611. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1612. default ZBOOT_ROM_NONE
  1613. help
  1614. Include experimental SD/MMC loading code in the ROM-able zImage.
  1615. With this enabled it is possible to write the the ROM-able zImage
  1616. kernel image to an MMC or SD card and boot the kernel straight
  1617. from the reset vector. At reset the processor Mask ROM will load
  1618. the first part of the the ROM-able zImage which in turn loads the
  1619. rest the kernel image to RAM.
  1620. config ZBOOT_ROM_NONE
  1621. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1622. help
  1623. Do not load image from SD or MMC
  1624. config ZBOOT_ROM_MMCIF
  1625. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1626. help
  1627. Load image from MMCIF hardware block.
  1628. config ZBOOT_ROM_SH_MOBILE_SDHI
  1629. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1630. help
  1631. Load image from SDHI hardware block
  1632. endchoice
  1633. config ARM_APPENDED_DTB
  1634. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1635. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1636. help
  1637. With this option, the boot code will look for a device tree binary
  1638. (DTB) appended to zImage
  1639. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1640. This is meant as a backward compatibility convenience for those
  1641. systems with a bootloader that can't be upgraded to accommodate
  1642. the documented boot protocol using a device tree.
  1643. Beware that there is very little in terms of protection against
  1644. this option being confused by leftover garbage in memory that might
  1645. look like a DTB header after a reboot if no actual DTB is appended
  1646. to zImage. Do not leave this option active in a production kernel
  1647. if you don't intend to always append a DTB. Proper passing of the
  1648. location into r2 of a bootloader provided DTB is always preferable
  1649. to this option.
  1650. config ARM_ATAG_DTB_COMPAT
  1651. bool "Supplement the appended DTB with traditional ATAG information"
  1652. depends on ARM_APPENDED_DTB
  1653. help
  1654. Some old bootloaders can't be updated to a DTB capable one, yet
  1655. they provide ATAGs with memory configuration, the ramdisk address,
  1656. the kernel cmdline string, etc. Such information is dynamically
  1657. provided by the bootloader and can't always be stored in a static
  1658. DTB. To allow a device tree enabled kernel to be used with such
  1659. bootloaders, this option allows zImage to extract the information
  1660. from the ATAG list and store it at run time into the appended DTB.
  1661. config CMDLINE
  1662. string "Default kernel command string"
  1663. default ""
  1664. help
  1665. On some architectures (EBSA110 and CATS), there is currently no way
  1666. for the boot loader to pass arguments to the kernel. For these
  1667. architectures, you should supply some command-line options at build
  1668. time by entering them here. As a minimum, you should specify the
  1669. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1670. choice
  1671. prompt "Kernel command line type" if CMDLINE != ""
  1672. default CMDLINE_FROM_BOOTLOADER
  1673. config CMDLINE_FROM_BOOTLOADER
  1674. bool "Use bootloader kernel arguments if available"
  1675. help
  1676. Uses the command-line options passed by the boot loader. If
  1677. the boot loader doesn't provide any, the default kernel command
  1678. string provided in CMDLINE will be used.
  1679. config CMDLINE_EXTEND
  1680. bool "Extend bootloader kernel arguments"
  1681. help
  1682. The command-line arguments provided by the boot loader will be
  1683. appended to the default kernel command string.
  1684. config CMDLINE_FORCE
  1685. bool "Always use the default kernel command string"
  1686. help
  1687. Always use the default kernel command string, even if the boot
  1688. loader passes other arguments to the kernel.
  1689. This is useful if you cannot or don't want to change the
  1690. command-line options your boot loader passes to the kernel.
  1691. endchoice
  1692. config XIP_KERNEL
  1693. bool "Kernel Execute-In-Place from ROM"
  1694. depends on !ZBOOT_ROM
  1695. help
  1696. Execute-In-Place allows the kernel to run from non-volatile storage
  1697. directly addressable by the CPU, such as NOR flash. This saves RAM
  1698. space since the text section of the kernel is not loaded from flash
  1699. to RAM. Read-write sections, such as the data section and stack,
  1700. are still copied to RAM. The XIP kernel is not compressed since
  1701. it has to run directly from flash, so it will take more space to
  1702. store it. The flash address used to link the kernel object files,
  1703. and for storing it, is configuration dependent. Therefore, if you
  1704. say Y here, you must know the proper physical address where to
  1705. store the kernel image depending on your own flash memory usage.
  1706. Also note that the make target becomes "make xipImage" rather than
  1707. "make zImage" or "make Image". The final kernel binary to put in
  1708. ROM memory will be arch/arm/boot/xipImage.
  1709. If unsure, say N.
  1710. config XIP_PHYS_ADDR
  1711. hex "XIP Kernel Physical Location"
  1712. depends on XIP_KERNEL
  1713. default "0x00080000"
  1714. help
  1715. This is the physical address in your flash memory the kernel will
  1716. be linked for and stored to. This address is dependent on your
  1717. own flash usage.
  1718. config KEXEC
  1719. bool "Kexec system call (EXPERIMENTAL)"
  1720. depends on EXPERIMENTAL
  1721. help
  1722. kexec is a system call that implements the ability to shutdown your
  1723. current kernel, and to start another kernel. It is like a reboot
  1724. but it is independent of the system firmware. And like a reboot
  1725. you can start any kernel with it, not just Linux.
  1726. It is an ongoing process to be certain the hardware in a machine
  1727. is properly shutdown, so do not be surprised if this code does not
  1728. initially work for you. It may help to enable device hotplugging
  1729. support.
  1730. config ATAGS_PROC
  1731. bool "Export atags in procfs"
  1732. depends on KEXEC
  1733. default y
  1734. help
  1735. Should the atags used to boot the kernel be exported in an "atags"
  1736. file in procfs. Useful with kexec.
  1737. config CRASH_DUMP
  1738. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1739. depends on EXPERIMENTAL
  1740. help
  1741. Generate crash dump after being started by kexec. This should
  1742. be normally only set in special crash dump kernels which are
  1743. loaded in the main kernel with kexec-tools into a specially
  1744. reserved region and then later executed after a crash by
  1745. kdump/kexec. The crash dump kernel must be compiled to a
  1746. memory address not used by the main kernel
  1747. For more details see Documentation/kdump/kdump.txt
  1748. config AUTO_ZRELADDR
  1749. bool "Auto calculation of the decompressed kernel image address"
  1750. depends on !ZBOOT_ROM && !ARCH_U300
  1751. help
  1752. ZRELADDR is the physical address where the decompressed kernel
  1753. image will be placed. If AUTO_ZRELADDR is selected, the address
  1754. will be determined at run-time by masking the current IP with
  1755. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1756. from start of memory.
  1757. endmenu
  1758. menu "CPU Power Management"
  1759. if ARCH_HAS_CPUFREQ
  1760. source "drivers/cpufreq/Kconfig"
  1761. config CPU_FREQ_IMX
  1762. tristate "CPUfreq driver for i.MX CPUs"
  1763. depends on ARCH_MXC && CPU_FREQ
  1764. help
  1765. This enables the CPUfreq driver for i.MX CPUs.
  1766. config CPU_FREQ_SA1100
  1767. bool
  1768. config CPU_FREQ_SA1110
  1769. bool
  1770. config CPU_FREQ_INTEGRATOR
  1771. tristate "CPUfreq driver for ARM Integrator CPUs"
  1772. depends on ARCH_INTEGRATOR && CPU_FREQ
  1773. default y
  1774. help
  1775. This enables the CPUfreq driver for ARM Integrator CPUs.
  1776. For details, take a look at <file:Documentation/cpu-freq>.
  1777. If in doubt, say Y.
  1778. config CPU_FREQ_PXA
  1779. bool
  1780. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1781. default y
  1782. select CPU_FREQ_TABLE
  1783. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1784. config CPU_FREQ_S3C
  1785. bool
  1786. help
  1787. Internal configuration node for common cpufreq on Samsung SoC
  1788. config CPU_FREQ_S3C24XX
  1789. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1790. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1791. select CPU_FREQ_S3C
  1792. help
  1793. This enables the CPUfreq driver for the Samsung S3C24XX family
  1794. of CPUs.
  1795. For details, take a look at <file:Documentation/cpu-freq>.
  1796. If in doubt, say N.
  1797. config CPU_FREQ_S3C24XX_PLL
  1798. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1799. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1800. help
  1801. Compile in support for changing the PLL frequency from the
  1802. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1803. after a frequency change, so by default it is not enabled.
  1804. This also means that the PLL tables for the selected CPU(s) will
  1805. be built which may increase the size of the kernel image.
  1806. config CPU_FREQ_S3C24XX_DEBUG
  1807. bool "Debug CPUfreq Samsung driver core"
  1808. depends on CPU_FREQ_S3C24XX
  1809. help
  1810. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1811. config CPU_FREQ_S3C24XX_IODEBUG
  1812. bool "Debug CPUfreq Samsung driver IO timing"
  1813. depends on CPU_FREQ_S3C24XX
  1814. help
  1815. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1816. config CPU_FREQ_S3C24XX_DEBUGFS
  1817. bool "Export debugfs for CPUFreq"
  1818. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1819. help
  1820. Export status information via debugfs.
  1821. endif
  1822. source "drivers/cpuidle/Kconfig"
  1823. endmenu
  1824. menu "Floating point emulation"
  1825. comment "At least one emulation must be selected"
  1826. config FPE_NWFPE
  1827. bool "NWFPE math emulation"
  1828. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1829. ---help---
  1830. Say Y to include the NWFPE floating point emulator in the kernel.
  1831. This is necessary to run most binaries. Linux does not currently
  1832. support floating point hardware so you need to say Y here even if
  1833. your machine has an FPA or floating point co-processor podule.
  1834. You may say N here if you are going to load the Acorn FPEmulator
  1835. early in the bootup.
  1836. config FPE_NWFPE_XP
  1837. bool "Support extended precision"
  1838. depends on FPE_NWFPE
  1839. help
  1840. Say Y to include 80-bit support in the kernel floating-point
  1841. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1842. Note that gcc does not generate 80-bit operations by default,
  1843. so in most cases this option only enlarges the size of the
  1844. floating point emulator without any good reason.
  1845. You almost surely want to say N here.
  1846. config FPE_FASTFPE
  1847. bool "FastFPE math emulation (EXPERIMENTAL)"
  1848. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1849. ---help---
  1850. Say Y here to include the FAST floating point emulator in the kernel.
  1851. This is an experimental much faster emulator which now also has full
  1852. precision for the mantissa. It does not support any exceptions.
  1853. It is very simple, and approximately 3-6 times faster than NWFPE.
  1854. It should be sufficient for most programs. It may be not suitable
  1855. for scientific calculations, but you have to check this for yourself.
  1856. If you do not feel you need a faster FP emulation you should better
  1857. choose NWFPE.
  1858. config VFP
  1859. bool "VFP-format floating point maths"
  1860. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1861. help
  1862. Say Y to include VFP support code in the kernel. This is needed
  1863. if your hardware includes a VFP unit.
  1864. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1865. release notes and additional status information.
  1866. Say N if your target does not have VFP hardware.
  1867. config VFPv3
  1868. bool
  1869. depends on VFP
  1870. default y if CPU_V7
  1871. config NEON
  1872. bool "Advanced SIMD (NEON) Extension support"
  1873. depends on VFPv3 && CPU_V7
  1874. help
  1875. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1876. Extension.
  1877. endmenu
  1878. menu "Userspace binary formats"
  1879. source "fs/Kconfig.binfmt"
  1880. config ARTHUR
  1881. tristate "RISC OS personality"
  1882. depends on !AEABI
  1883. help
  1884. Say Y here to include the kernel code necessary if you want to run
  1885. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1886. experimental; if this sounds frightening, say N and sleep in peace.
  1887. You can also say M here to compile this support as a module (which
  1888. will be called arthur).
  1889. endmenu
  1890. menu "Power management options"
  1891. source "kernel/power/Kconfig"
  1892. config ARCH_SUSPEND_POSSIBLE
  1893. depends on !ARCH_S5PC100
  1894. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1895. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1896. def_bool y
  1897. config ARM_CPU_SUSPEND
  1898. def_bool PM_SLEEP
  1899. endmenu
  1900. source "net/Kconfig"
  1901. source "drivers/Kconfig"
  1902. source "fs/Kconfig"
  1903. source "arch/arm/Kconfig.debug"
  1904. source "security/Kconfig"
  1905. source "crypto/Kconfig"
  1906. source "lib/Kconfig"