Kconfig 64 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361136213631364136513661367136813691370137113721373137413751376137713781379138013811382138313841385138613871388138913901391139213931394139513961397139813991400140114021403140414051406140714081409141014111412141314141415141614171418141914201421142214231424142514261427142814291430143114321433143414351436143714381439144014411442144314441445144614471448144914501451145214531454145514561457145814591460146114621463146414651466146714681469147014711472147314741475147614771478147914801481148214831484148514861487148814891490149114921493149414951496149714981499150015011502150315041505150615071508150915101511151215131514151515161517151815191520152115221523152415251526152715281529153015311532153315341535153615371538153915401541154215431544154515461547154815491550155115521553155415551556155715581559156015611562156315641565156615671568156915701571157215731574157515761577157815791580158115821583158415851586158715881589159015911592159315941595159615971598159916001601160216031604160516061607160816091610161116121613161416151616161716181619162016211622162316241625162616271628162916301631163216331634163516361637163816391640164116421643164416451646164716481649165016511652165316541655165616571658165916601661166216631664166516661667166816691670167116721673167416751676167716781679168016811682168316841685168616871688168916901691169216931694169516961697169816991700170117021703170417051706170717081709171017111712171317141715171617171718171917201721172217231724172517261727172817291730173117321733173417351736173717381739174017411742174317441745174617471748174917501751175217531754175517561757175817591760176117621763176417651766176717681769177017711772177317741775177617771778177917801781178217831784178517861787178817891790179117921793179417951796179717981799180018011802180318041805180618071808180918101811181218131814181518161817181818191820182118221823182418251826182718281829183018311832183318341835183618371838183918401841184218431844184518461847184818491850185118521853185418551856185718581859186018611862186318641865186618671868186918701871187218731874187518761877187818791880188118821883188418851886188718881889189018911892189318941895189618971898189919001901190219031904190519061907190819091910191119121913191419151916191719181919192019211922192319241925192619271928192919301931193219331934193519361937193819391940194119421943194419451946194719481949195019511952195319541955195619571958195919601961196219631964196519661967196819691970197119721973197419751976197719781979198019811982198319841985198619871988198919901991199219931994199519961997199819992000200120022003200420052006200720082009201020112012201320142015201620172018201920202021202220232024202520262027202820292030203120322033203420352036203720382039204020412042204320442045204620472048204920502051205220532054205520562057205820592060206120622063206420652066206720682069207020712072207320742075207620772078207920802081208220832084208520862087208820892090209120922093209420952096209720982099210021012102210321042105210621072108210921102111211221132114211521162117211821192120212121222123212421252126212721282129213021312132213321342135213621372138213921402141214221432144214521462147214821492150215121522153215421552156215721582159216021612162216321642165216621672168216921702171217221732174217521762177217821792180218121822183218421852186218721882189219021912192219321942195219621972198219922002201220222032204220522062207220822092210221122122213221422152216221722182219222022212222222322242225222622272228222922302231223222332234223522362237223822392240
  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 ICST
  208. select GENERIC_CLOCKEVENTS
  209. select PLAT_VERSATILE
  210. select PLAT_VERSATILE_FPGA_IRQ
  211. select NEED_MACH_MEMORY_H
  212. help
  213. Support for ARM's Integrator platform.
  214. config ARCH_REALVIEW
  215. bool "ARM Ltd. RealView family"
  216. select ARM_AMBA
  217. select CLKDEV_LOOKUP
  218. select HAVE_MACH_CLKDEV
  219. select ICST
  220. select GENERIC_CLOCKEVENTS
  221. select ARCH_WANT_OPTIONAL_GPIOLIB
  222. select PLAT_VERSATILE
  223. select PLAT_VERSATILE_CLCD
  224. select ARM_TIMER_SP804
  225. select GPIO_PL061 if GPIOLIB
  226. select NEED_MACH_MEMORY_H
  227. select MULTI_IRQ_HANDLER
  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. select MULTI_IRQ_HANDLER
  259. help
  260. This enables support for the ARM Ltd Versatile Express boards.
  261. config ARCH_AT91
  262. bool "Atmel AT91"
  263. select ARCH_REQUIRE_GPIOLIB
  264. select HAVE_CLK
  265. select CLKDEV_LOOKUP
  266. help
  267. This enables support for systems based on the Atmel AT91RM9200,
  268. AT91SAM9 and AT91CAP9 processors.
  269. config ARCH_BCMRING
  270. bool "Broadcom BCMRING"
  271. depends on MMU
  272. select CPU_V6
  273. select ARM_AMBA
  274. select ARM_TIMER_SP804
  275. select CLKDEV_LOOKUP
  276. select GENERIC_CLOCKEVENTS
  277. select ARCH_WANT_OPTIONAL_GPIOLIB
  278. help
  279. Support for Broadcom's BCMRing platform.
  280. config ARCH_HIGHBANK
  281. bool "Calxeda Highbank-based"
  282. select ARCH_WANT_OPTIONAL_GPIOLIB
  283. select ARM_AMBA
  284. select ARM_GIC
  285. select ARM_TIMER_SP804
  286. select CLKDEV_LOOKUP
  287. select CPU_V7
  288. select GENERIC_CLOCKEVENTS
  289. select HAVE_ARM_SCU
  290. select USE_OF
  291. select MULTI_IRQ_HANDLER
  292. help
  293. Support for the Calxeda Highbank SoC based boards.
  294. config ARCH_CLPS711X
  295. bool "Cirrus Logic CLPS711x/EP721x-based"
  296. select CPU_ARM720T
  297. select ARCH_USES_GETTIMEOFFSET
  298. select NEED_MACH_MEMORY_H
  299. help
  300. Support for Cirrus Logic 711x/721x based boards.
  301. config ARCH_CNS3XXX
  302. bool "Cavium Networks CNS3XXX family"
  303. select CPU_V6K
  304. select GENERIC_CLOCKEVENTS
  305. select ARM_GIC
  306. select MIGHT_HAVE_PCI
  307. select PCI_DOMAINS if PCI
  308. help
  309. Support for Cavium Networks CNS3XXX platform.
  310. config ARCH_GEMINI
  311. bool "Cortina Systems Gemini"
  312. select CPU_FA526
  313. select ARCH_REQUIRE_GPIOLIB
  314. select ARCH_USES_GETTIMEOFFSET
  315. help
  316. Support for the Cortina Systems Gemini family SoCs
  317. config ARCH_PRIMA2
  318. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  319. select CPU_V7
  320. select NO_IOPORT
  321. select GENERIC_CLOCKEVENTS
  322. select CLKDEV_LOOKUP
  323. select GENERIC_IRQ_CHIP
  324. select USE_OF
  325. select ZONE_DMA
  326. help
  327. Support for CSR SiRFSoC ARM Cortex A9 Platform
  328. config ARCH_EBSA110
  329. bool "EBSA-110"
  330. select CPU_SA110
  331. select ISA
  332. select NO_IOPORT
  333. select ARCH_USES_GETTIMEOFFSET
  334. select NEED_MACH_MEMORY_H
  335. help
  336. This is an evaluation board for the StrongARM processor available
  337. from Digital. It has limited hardware on-board, including an
  338. Ethernet interface, two PCMCIA sockets, two serial ports and a
  339. parallel port.
  340. config ARCH_EP93XX
  341. bool "EP93xx-based"
  342. select CPU_ARM920T
  343. select ARM_AMBA
  344. select ARM_VIC
  345. select CLKDEV_LOOKUP
  346. select ARCH_REQUIRE_GPIOLIB
  347. select ARCH_HAS_HOLES_MEMORYMODEL
  348. select ARCH_USES_GETTIMEOFFSET
  349. select NEED_MACH_MEMORY_H
  350. help
  351. This enables support for the Cirrus EP93xx series of CPUs.
  352. config ARCH_FOOTBRIDGE
  353. bool "FootBridge"
  354. select CPU_SA110
  355. select FOOTBRIDGE
  356. select GENERIC_CLOCKEVENTS
  357. select HAVE_IDE
  358. select NEED_MACH_MEMORY_H
  359. help
  360. Support for systems based on the DC21285 companion chip
  361. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  362. config ARCH_MXC
  363. bool "Freescale MXC/iMX-based"
  364. select GENERIC_CLOCKEVENTS
  365. select ARCH_REQUIRE_GPIOLIB
  366. select CLKDEV_LOOKUP
  367. select CLKSRC_MMIO
  368. select GENERIC_IRQ_CHIP
  369. select HAVE_SCHED_CLOCK
  370. select MULTI_IRQ_HANDLER
  371. help
  372. Support for Freescale MXC/iMX-based family of processors
  373. config ARCH_MXS
  374. bool "Freescale MXS-based"
  375. select GENERIC_CLOCKEVENTS
  376. select ARCH_REQUIRE_GPIOLIB
  377. select CLKDEV_LOOKUP
  378. select CLKSRC_MMIO
  379. help
  380. Support for Freescale MXS-based family of processors
  381. config ARCH_NETX
  382. bool "Hilscher NetX based"
  383. select CLKSRC_MMIO
  384. select CPU_ARM926T
  385. select ARM_VIC
  386. select GENERIC_CLOCKEVENTS
  387. help
  388. This enables support for systems based on the Hilscher NetX Soc
  389. config ARCH_H720X
  390. bool "Hynix HMS720x-based"
  391. select CPU_ARM720T
  392. select ISA_DMA_API
  393. select ARCH_USES_GETTIMEOFFSET
  394. help
  395. This enables support for systems based on the Hynix HMS720x
  396. config ARCH_IOP13XX
  397. bool "IOP13xx-based"
  398. depends on MMU
  399. select CPU_XSC3
  400. select PLAT_IOP
  401. select PCI
  402. select ARCH_SUPPORTS_MSI
  403. select VMSPLIT_1G
  404. select NEED_MACH_MEMORY_H
  405. help
  406. Support for Intel's IOP13XX (XScale) family of processors.
  407. config ARCH_IOP32X
  408. bool "IOP32x-based"
  409. depends on MMU
  410. select CPU_XSCALE
  411. select PLAT_IOP
  412. select PCI
  413. select ARCH_REQUIRE_GPIOLIB
  414. help
  415. Support for Intel's 80219 and IOP32X (XScale) family of
  416. processors.
  417. config ARCH_IOP33X
  418. bool "IOP33x-based"
  419. depends on MMU
  420. select CPU_XSCALE
  421. select PLAT_IOP
  422. select PCI
  423. select ARCH_REQUIRE_GPIOLIB
  424. help
  425. Support for Intel's IOP33X (XScale) family of processors.
  426. config ARCH_IXP23XX
  427. bool "IXP23XX-based"
  428. depends on MMU
  429. select CPU_XSC3
  430. select PCI
  431. select ARCH_USES_GETTIMEOFFSET
  432. select NEED_MACH_MEMORY_H
  433. help
  434. Support for Intel's IXP23xx (XScale) family of processors.
  435. config ARCH_IXP2000
  436. bool "IXP2400/2800-based"
  437. depends on MMU
  438. select CPU_XSCALE
  439. select PCI
  440. select ARCH_USES_GETTIMEOFFSET
  441. select NEED_MACH_MEMORY_H
  442. help
  443. Support for Intel's IXP2400/2800 (XScale) family of processors.
  444. config ARCH_IXP4XX
  445. bool "IXP4xx-based"
  446. depends on MMU
  447. select CLKSRC_MMIO
  448. select CPU_XSCALE
  449. select GENERIC_GPIO
  450. select GENERIC_CLOCKEVENTS
  451. select HAVE_SCHED_CLOCK
  452. select MIGHT_HAVE_PCI
  453. select DMABOUNCE if PCI
  454. help
  455. Support for Intel's IXP4XX (XScale) family of processors.
  456. config ARCH_DOVE
  457. bool "Marvell Dove"
  458. select CPU_V7
  459. select PCI
  460. select ARCH_REQUIRE_GPIOLIB
  461. select GENERIC_CLOCKEVENTS
  462. select PLAT_ORION
  463. help
  464. Support for the Marvell Dove SoC 88AP510
  465. config ARCH_KIRKWOOD
  466. bool "Marvell Kirkwood"
  467. select CPU_FEROCEON
  468. select PCI
  469. select ARCH_REQUIRE_GPIOLIB
  470. select GENERIC_CLOCKEVENTS
  471. select PLAT_ORION
  472. help
  473. Support for the following Marvell Kirkwood series SoCs:
  474. 88F6180, 88F6192 and 88F6281.
  475. config ARCH_LPC32XX
  476. bool "NXP LPC32XX"
  477. select CLKSRC_MMIO
  478. select CPU_ARM926T
  479. select ARCH_REQUIRE_GPIOLIB
  480. select HAVE_IDE
  481. select ARM_AMBA
  482. select USB_ARCH_HAS_OHCI
  483. select CLKDEV_LOOKUP
  484. select GENERIC_CLOCKEVENTS
  485. help
  486. Support for the NXP LPC32XX family of processors
  487. config ARCH_MV78XX0
  488. bool "Marvell MV78xx0"
  489. select CPU_FEROCEON
  490. select PCI
  491. select ARCH_REQUIRE_GPIOLIB
  492. select GENERIC_CLOCKEVENTS
  493. select PLAT_ORION
  494. help
  495. Support for the following Marvell MV78xx0 series SoCs:
  496. MV781x0, MV782x0.
  497. config ARCH_ORION5X
  498. bool "Marvell Orion"
  499. depends on MMU
  500. select CPU_FEROCEON
  501. select PCI
  502. select ARCH_REQUIRE_GPIOLIB
  503. select GENERIC_CLOCKEVENTS
  504. select PLAT_ORION
  505. help
  506. Support for the following Marvell Orion 5x series SoCs:
  507. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  508. Orion-2 (5281), Orion-1-90 (6183).
  509. config ARCH_MMP
  510. bool "Marvell PXA168/910/MMP2"
  511. depends on MMU
  512. select ARCH_REQUIRE_GPIOLIB
  513. select CLKDEV_LOOKUP
  514. select GENERIC_CLOCKEVENTS
  515. select HAVE_SCHED_CLOCK
  516. select TICK_ONESHOT
  517. select PLAT_PXA
  518. select SPARSE_IRQ
  519. select GENERIC_ALLOCATOR
  520. help
  521. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  522. config ARCH_KS8695
  523. bool "Micrel/Kendin KS8695"
  524. select CPU_ARM922T
  525. select ARCH_REQUIRE_GPIOLIB
  526. select ARCH_USES_GETTIMEOFFSET
  527. select NEED_MACH_MEMORY_H
  528. help
  529. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  530. System-on-Chip devices.
  531. config ARCH_W90X900
  532. bool "Nuvoton W90X900 CPU"
  533. select CPU_ARM926T
  534. select ARCH_REQUIRE_GPIOLIB
  535. select CLKDEV_LOOKUP
  536. select CLKSRC_MMIO
  537. select GENERIC_CLOCKEVENTS
  538. help
  539. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  540. At present, the w90x900 has been renamed nuc900, regarding
  541. the ARM series product line, you can login the following
  542. link address to know more.
  543. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  544. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  545. config ARCH_TEGRA
  546. bool "NVIDIA Tegra"
  547. select CLKDEV_LOOKUP
  548. select CLKSRC_MMIO
  549. select GENERIC_CLOCKEVENTS
  550. select GENERIC_GPIO
  551. select HAVE_CLK
  552. select HAVE_SCHED_CLOCK
  553. select ARCH_HAS_CPUFREQ
  554. help
  555. This enables support for NVIDIA Tegra based systems (Tegra APX,
  556. Tegra 6xx and Tegra 2 series).
  557. config ARCH_PICOXCELL
  558. bool "Picochip picoXcell"
  559. select ARCH_REQUIRE_GPIOLIB
  560. select ARM_PATCH_PHYS_VIRT
  561. select ARM_VIC
  562. select CPU_V6K
  563. select DW_APB_TIMER
  564. select GENERIC_CLOCKEVENTS
  565. select GENERIC_GPIO
  566. select HAVE_SCHED_CLOCK
  567. select HAVE_TCM
  568. select NO_IOPORT
  569. select USE_OF
  570. help
  571. This enables support for systems based on the Picochip picoXcell
  572. family of Femtocell devices. The picoxcell support requires device tree
  573. for all boards.
  574. config ARCH_PNX4008
  575. bool "Philips Nexperia PNX4008 Mobile"
  576. select CPU_ARM926T
  577. select CLKDEV_LOOKUP
  578. select ARCH_USES_GETTIMEOFFSET
  579. help
  580. This enables support for Philips PNX4008 mobile platform.
  581. config ARCH_PXA
  582. bool "PXA2xx/PXA3xx-based"
  583. depends on MMU
  584. select ARCH_MTD_XIP
  585. select ARCH_HAS_CPUFREQ
  586. select CLKDEV_LOOKUP
  587. select CLKSRC_MMIO
  588. select ARCH_REQUIRE_GPIOLIB
  589. select GENERIC_CLOCKEVENTS
  590. select HAVE_SCHED_CLOCK
  591. select TICK_ONESHOT
  592. select PLAT_PXA
  593. select SPARSE_IRQ
  594. select AUTO_ZRELADDR
  595. select MULTI_IRQ_HANDLER
  596. select ARM_CPU_SUSPEND if PM
  597. select HAVE_IDE
  598. help
  599. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  600. config ARCH_MSM
  601. bool "Qualcomm MSM"
  602. select HAVE_CLK
  603. select GENERIC_CLOCKEVENTS
  604. select ARCH_REQUIRE_GPIOLIB
  605. select CLKDEV_LOOKUP
  606. help
  607. Support for Qualcomm MSM/QSD based systems. This runs on the
  608. apps processor of the MSM/QSD and depends on a shared memory
  609. interface to the modem processor which runs the baseband
  610. stack and controls some vital subsystems
  611. (clock and power control, etc).
  612. config ARCH_SHMOBILE
  613. bool "Renesas SH-Mobile / R-Mobile"
  614. select HAVE_CLK
  615. select CLKDEV_LOOKUP
  616. select HAVE_MACH_CLKDEV
  617. select GENERIC_CLOCKEVENTS
  618. select NO_IOPORT
  619. select SPARSE_IRQ
  620. select MULTI_IRQ_HANDLER
  621. select PM_GENERIC_DOMAINS if PM
  622. select NEED_MACH_MEMORY_H
  623. help
  624. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  625. config ARCH_RPC
  626. bool "RiscPC"
  627. select ARCH_ACORN
  628. select FIQ
  629. select TIMER_ACORN
  630. select ARCH_MAY_HAVE_PC_FDC
  631. select HAVE_PATA_PLATFORM
  632. select ISA_DMA_API
  633. select NO_IOPORT
  634. select ARCH_SPARSEMEM_ENABLE
  635. select ARCH_USES_GETTIMEOFFSET
  636. select HAVE_IDE
  637. select NEED_MACH_MEMORY_H
  638. help
  639. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  640. CD-ROM interface, serial and parallel port, and the floppy drive.
  641. config ARCH_SA1100
  642. bool "SA1100-based"
  643. select CLKSRC_MMIO
  644. select CPU_SA1100
  645. select ISA
  646. select ARCH_SPARSEMEM_ENABLE
  647. select ARCH_MTD_XIP
  648. select ARCH_HAS_CPUFREQ
  649. select CPU_FREQ
  650. select GENERIC_CLOCKEVENTS
  651. select HAVE_CLK
  652. select HAVE_SCHED_CLOCK
  653. select TICK_ONESHOT
  654. select ARCH_REQUIRE_GPIOLIB
  655. select HAVE_IDE
  656. select NEED_MACH_MEMORY_H
  657. help
  658. Support for StrongARM 11x0 based boards.
  659. config ARCH_S3C2410
  660. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  661. select GENERIC_GPIO
  662. select ARCH_HAS_CPUFREQ
  663. select HAVE_CLK
  664. select CLKDEV_LOOKUP
  665. select ARCH_USES_GETTIMEOFFSET
  666. select HAVE_S3C2410_I2C if I2C
  667. help
  668. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  669. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  670. the Samsung SMDK2410 development board (and derivatives).
  671. Note, the S3C2416 and the S3C2450 are so close that they even share
  672. the same SoC ID code. This means that there is no separate machine
  673. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  674. config ARCH_S3C64XX
  675. bool "Samsung S3C64XX"
  676. select PLAT_SAMSUNG
  677. select CPU_V6
  678. select ARM_VIC
  679. select HAVE_CLK
  680. select HAVE_TCM
  681. select CLKDEV_LOOKUP
  682. select NO_IOPORT
  683. select ARCH_USES_GETTIMEOFFSET
  684. select ARCH_HAS_CPUFREQ
  685. select ARCH_REQUIRE_GPIOLIB
  686. select SAMSUNG_CLKSRC
  687. select SAMSUNG_IRQ_VIC_TIMER
  688. select S3C_GPIO_TRACK
  689. select S3C_DEV_NAND
  690. select USB_ARCH_HAS_OHCI
  691. select SAMSUNG_GPIOLIB_4BIT
  692. select HAVE_S3C2410_I2C if I2C
  693. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  694. help
  695. Samsung S3C64XX series based systems
  696. config ARCH_S5P64X0
  697. bool "Samsung S5P6440 S5P6450"
  698. select CPU_V6
  699. select GENERIC_GPIO
  700. select HAVE_CLK
  701. select CLKDEV_LOOKUP
  702. select CLKSRC_MMIO
  703. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  704. select GENERIC_CLOCKEVENTS
  705. select HAVE_SCHED_CLOCK
  706. select HAVE_S3C2410_I2C if I2C
  707. select HAVE_S3C_RTC if RTC_CLASS
  708. help
  709. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  710. SMDK6450.
  711. config ARCH_S5PC100
  712. bool "Samsung S5PC100"
  713. select GENERIC_GPIO
  714. select HAVE_CLK
  715. select CLKDEV_LOOKUP
  716. select CPU_V7
  717. select ARM_L1_CACHE_SHIFT_6
  718. select ARCH_USES_GETTIMEOFFSET
  719. select HAVE_S3C2410_I2C if I2C
  720. select HAVE_S3C_RTC if RTC_CLASS
  721. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  722. help
  723. Samsung S5PC100 series based systems
  724. config ARCH_S5PV210
  725. bool "Samsung S5PV210/S5PC110"
  726. select CPU_V7
  727. select ARCH_SPARSEMEM_ENABLE
  728. select ARCH_HAS_HOLES_MEMORYMODEL
  729. select GENERIC_GPIO
  730. select HAVE_CLK
  731. select CLKDEV_LOOKUP
  732. select CLKSRC_MMIO
  733. select ARM_L1_CACHE_SHIFT_6
  734. select ARCH_HAS_CPUFREQ
  735. select GENERIC_CLOCKEVENTS
  736. select HAVE_SCHED_CLOCK
  737. select HAVE_S3C2410_I2C if I2C
  738. select HAVE_S3C_RTC if RTC_CLASS
  739. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  740. select NEED_MACH_MEMORY_H
  741. help
  742. Samsung S5PV210/S5PC110 series based systems
  743. config ARCH_EXYNOS
  744. bool "SAMSUNG EXYNOS"
  745. select CPU_V7
  746. select ARCH_SPARSEMEM_ENABLE
  747. select ARCH_HAS_HOLES_MEMORYMODEL
  748. select GENERIC_GPIO
  749. select HAVE_CLK
  750. select CLKDEV_LOOKUP
  751. select ARCH_HAS_CPUFREQ
  752. select GENERIC_CLOCKEVENTS
  753. select HAVE_S3C_RTC if RTC_CLASS
  754. select HAVE_S3C2410_I2C if I2C
  755. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  756. select NEED_MACH_MEMORY_H
  757. select MULTI_IRQ_HANDLER
  758. help
  759. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  760. config ARCH_SHARK
  761. bool "Shark"
  762. select CPU_SA110
  763. select ISA
  764. select ISA_DMA
  765. select ZONE_DMA
  766. select PCI
  767. select ARCH_USES_GETTIMEOFFSET
  768. select NEED_MACH_MEMORY_H
  769. help
  770. Support for the StrongARM based Digital DNARD machine, also known
  771. as "Shark" (<http://www.shark-linux.de/shark.html>).
  772. config ARCH_TCC_926
  773. bool "Telechips TCC ARM926-based systems"
  774. select CLKSRC_MMIO
  775. select CPU_ARM926T
  776. select HAVE_CLK
  777. select CLKDEV_LOOKUP
  778. select GENERIC_CLOCKEVENTS
  779. help
  780. Support for Telechips TCC ARM926-based systems.
  781. config ARCH_U300
  782. bool "ST-Ericsson U300 Series"
  783. depends on MMU
  784. select CLKSRC_MMIO
  785. select CPU_ARM926T
  786. select HAVE_SCHED_CLOCK
  787. select HAVE_TCM
  788. select ARM_AMBA
  789. select ARM_PATCH_PHYS_VIRT
  790. select ARM_VIC
  791. select GENERIC_CLOCKEVENTS
  792. select CLKDEV_LOOKUP
  793. select HAVE_MACH_CLKDEV
  794. select GENERIC_GPIO
  795. select ARCH_REQUIRE_GPIOLIB
  796. select NEED_MACH_MEMORY_H
  797. help
  798. Support for ST-Ericsson U300 series mobile platforms.
  799. config ARCH_U8500
  800. bool "ST-Ericsson U8500 Series"
  801. select CPU_V7
  802. select ARM_AMBA
  803. select GENERIC_CLOCKEVENTS
  804. select CLKDEV_LOOKUP
  805. select ARCH_REQUIRE_GPIOLIB
  806. select ARCH_HAS_CPUFREQ
  807. help
  808. Support for ST-Ericsson's Ux500 architecture
  809. config ARCH_NOMADIK
  810. bool "STMicroelectronics Nomadik"
  811. select ARM_AMBA
  812. select ARM_VIC
  813. select CPU_ARM926T
  814. select CLKDEV_LOOKUP
  815. select GENERIC_CLOCKEVENTS
  816. select ARCH_REQUIRE_GPIOLIB
  817. help
  818. Support for the Nomadik platform by ST-Ericsson
  819. config ARCH_DAVINCI
  820. bool "TI DaVinci"
  821. select GENERIC_CLOCKEVENTS
  822. select ARCH_REQUIRE_GPIOLIB
  823. select ZONE_DMA
  824. select HAVE_IDE
  825. select CLKDEV_LOOKUP
  826. select GENERIC_ALLOCATOR
  827. select GENERIC_IRQ_CHIP
  828. select ARCH_HAS_HOLES_MEMORYMODEL
  829. help
  830. Support for TI's DaVinci platform.
  831. config ARCH_OMAP
  832. bool "TI OMAP"
  833. select HAVE_CLK
  834. select ARCH_REQUIRE_GPIOLIB
  835. select ARCH_HAS_CPUFREQ
  836. select CLKSRC_MMIO
  837. select GENERIC_CLOCKEVENTS
  838. select HAVE_SCHED_CLOCK
  839. select ARCH_HAS_HOLES_MEMORYMODEL
  840. help
  841. Support for TI's OMAP platform (OMAP1/2/3/4).
  842. config PLAT_SPEAR
  843. bool "ST SPEAr"
  844. select ARM_AMBA
  845. select ARCH_REQUIRE_GPIOLIB
  846. select CLKDEV_LOOKUP
  847. select CLKSRC_MMIO
  848. select GENERIC_CLOCKEVENTS
  849. select HAVE_CLK
  850. help
  851. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  852. config ARCH_VT8500
  853. bool "VIA/WonderMedia 85xx"
  854. select CPU_ARM926T
  855. select GENERIC_GPIO
  856. select ARCH_HAS_CPUFREQ
  857. select GENERIC_CLOCKEVENTS
  858. select ARCH_REQUIRE_GPIOLIB
  859. select HAVE_PWM
  860. help
  861. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  862. config ARCH_ZYNQ
  863. bool "Xilinx Zynq ARM Cortex A9 Platform"
  864. select CPU_V7
  865. select GENERIC_CLOCKEVENTS
  866. select CLKDEV_LOOKUP
  867. select ARM_GIC
  868. select ARM_AMBA
  869. select ICST
  870. select USE_OF
  871. help
  872. Support for Xilinx Zynq ARM Cortex A9 Platform
  873. endchoice
  874. #
  875. # This is sorted alphabetically by mach-* pathname. However, plat-*
  876. # Kconfigs may be included either alphabetically (according to the
  877. # plat- suffix) or along side the corresponding mach-* source.
  878. #
  879. source "arch/arm/mach-at91/Kconfig"
  880. source "arch/arm/mach-bcmring/Kconfig"
  881. source "arch/arm/mach-clps711x/Kconfig"
  882. source "arch/arm/mach-cns3xxx/Kconfig"
  883. source "arch/arm/mach-davinci/Kconfig"
  884. source "arch/arm/mach-dove/Kconfig"
  885. source "arch/arm/mach-ep93xx/Kconfig"
  886. source "arch/arm/mach-footbridge/Kconfig"
  887. source "arch/arm/mach-gemini/Kconfig"
  888. source "arch/arm/mach-h720x/Kconfig"
  889. source "arch/arm/mach-integrator/Kconfig"
  890. source "arch/arm/mach-iop32x/Kconfig"
  891. source "arch/arm/mach-iop33x/Kconfig"
  892. source "arch/arm/mach-iop13xx/Kconfig"
  893. source "arch/arm/mach-ixp4xx/Kconfig"
  894. source "arch/arm/mach-ixp2000/Kconfig"
  895. source "arch/arm/mach-ixp23xx/Kconfig"
  896. source "arch/arm/mach-kirkwood/Kconfig"
  897. source "arch/arm/mach-ks8695/Kconfig"
  898. source "arch/arm/mach-lpc32xx/Kconfig"
  899. source "arch/arm/mach-msm/Kconfig"
  900. source "arch/arm/mach-mv78xx0/Kconfig"
  901. source "arch/arm/plat-mxc/Kconfig"
  902. source "arch/arm/mach-mxs/Kconfig"
  903. source "arch/arm/mach-netx/Kconfig"
  904. source "arch/arm/mach-nomadik/Kconfig"
  905. source "arch/arm/plat-nomadik/Kconfig"
  906. source "arch/arm/plat-omap/Kconfig"
  907. source "arch/arm/mach-omap1/Kconfig"
  908. source "arch/arm/mach-omap2/Kconfig"
  909. source "arch/arm/mach-orion5x/Kconfig"
  910. source "arch/arm/mach-pxa/Kconfig"
  911. source "arch/arm/plat-pxa/Kconfig"
  912. source "arch/arm/mach-mmp/Kconfig"
  913. source "arch/arm/mach-realview/Kconfig"
  914. source "arch/arm/mach-sa1100/Kconfig"
  915. source "arch/arm/plat-samsung/Kconfig"
  916. source "arch/arm/plat-s3c24xx/Kconfig"
  917. source "arch/arm/plat-s5p/Kconfig"
  918. source "arch/arm/plat-spear/Kconfig"
  919. source "arch/arm/plat-tcc/Kconfig"
  920. if ARCH_S3C2410
  921. source "arch/arm/mach-s3c2410/Kconfig"
  922. source "arch/arm/mach-s3c2412/Kconfig"
  923. source "arch/arm/mach-s3c2416/Kconfig"
  924. source "arch/arm/mach-s3c2440/Kconfig"
  925. source "arch/arm/mach-s3c2443/Kconfig"
  926. endif
  927. if ARCH_S3C64XX
  928. source "arch/arm/mach-s3c64xx/Kconfig"
  929. endif
  930. source "arch/arm/mach-s5p64x0/Kconfig"
  931. source "arch/arm/mach-s5pc100/Kconfig"
  932. source "arch/arm/mach-s5pv210/Kconfig"
  933. source "arch/arm/mach-exynos/Kconfig"
  934. source "arch/arm/mach-shmobile/Kconfig"
  935. source "arch/arm/mach-tegra/Kconfig"
  936. source "arch/arm/mach-u300/Kconfig"
  937. source "arch/arm/mach-ux500/Kconfig"
  938. source "arch/arm/mach-versatile/Kconfig"
  939. source "arch/arm/mach-vexpress/Kconfig"
  940. source "arch/arm/plat-versatile/Kconfig"
  941. source "arch/arm/mach-vt8500/Kconfig"
  942. source "arch/arm/mach-w90x900/Kconfig"
  943. # Definitions to make life easier
  944. config ARCH_ACORN
  945. bool
  946. config PLAT_IOP
  947. bool
  948. select GENERIC_CLOCKEVENTS
  949. select HAVE_SCHED_CLOCK
  950. config PLAT_ORION
  951. bool
  952. select CLKSRC_MMIO
  953. select GENERIC_IRQ_CHIP
  954. select HAVE_SCHED_CLOCK
  955. config PLAT_PXA
  956. bool
  957. config PLAT_VERSATILE
  958. bool
  959. config ARM_TIMER_SP804
  960. bool
  961. select CLKSRC_MMIO
  962. source arch/arm/mm/Kconfig
  963. config IWMMXT
  964. bool "Enable iWMMXt support"
  965. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  966. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  967. help
  968. Enable support for iWMMXt context switching at run time if
  969. running on a CPU that supports it.
  970. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  971. config XSCALE_PMU
  972. bool
  973. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  974. default y
  975. config CPU_HAS_PMU
  976. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  977. (!ARCH_OMAP3 || OMAP3_EMU)
  978. default y
  979. bool
  980. config MULTI_IRQ_HANDLER
  981. bool
  982. help
  983. Allow each machine to specify it's own IRQ handler at run time.
  984. if !MMU
  985. source "arch/arm/Kconfig-nommu"
  986. endif
  987. config ARM_ERRATA_411920
  988. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  989. depends on CPU_V6 || CPU_V6K
  990. help
  991. Invalidation of the Instruction Cache operation can
  992. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  993. It does not affect the MPCore. This option enables the ARM Ltd.
  994. recommended workaround.
  995. config ARM_ERRATA_430973
  996. bool "ARM errata: Stale prediction on replaced interworking branch"
  997. depends on CPU_V7
  998. help
  999. This option enables the workaround for the 430973 Cortex-A8
  1000. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1001. interworking branch is replaced with another code sequence at the
  1002. same virtual address, whether due to self-modifying code or virtual
  1003. to physical address re-mapping, Cortex-A8 does not recover from the
  1004. stale interworking branch prediction. This results in Cortex-A8
  1005. executing the new code sequence in the incorrect ARM or Thumb state.
  1006. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1007. and also flushes the branch target cache at every context switch.
  1008. Note that setting specific bits in the ACTLR register may not be
  1009. available in non-secure mode.
  1010. config ARM_ERRATA_458693
  1011. bool "ARM errata: Processor deadlock when a false hazard is created"
  1012. depends on CPU_V7
  1013. help
  1014. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1015. erratum. For very specific sequences of memory operations, it is
  1016. possible for a hazard condition intended for a cache line to instead
  1017. be incorrectly associated with a different cache line. This false
  1018. hazard might then cause a processor deadlock. The workaround enables
  1019. the L1 caching of the NEON accesses and disables the PLD instruction
  1020. in the ACTLR register. Note that setting specific bits in the ACTLR
  1021. register may not be available in non-secure mode.
  1022. config ARM_ERRATA_460075
  1023. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1024. depends on CPU_V7
  1025. help
  1026. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1027. erratum. Any asynchronous access to the L2 cache may encounter a
  1028. situation in which recent store transactions to the L2 cache are lost
  1029. and overwritten with stale memory contents from external memory. The
  1030. workaround disables the write-allocate mode for the L2 cache via the
  1031. ACTLR register. Note that setting specific bits in the ACTLR register
  1032. may not be available in non-secure mode.
  1033. config ARM_ERRATA_742230
  1034. bool "ARM errata: DMB operation may be faulty"
  1035. depends on CPU_V7 && SMP
  1036. help
  1037. This option enables the workaround for the 742230 Cortex-A9
  1038. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1039. between two write operations may not ensure the correct visibility
  1040. ordering of the two writes. This workaround sets a specific bit in
  1041. the diagnostic register of the Cortex-A9 which causes the DMB
  1042. instruction to behave as a DSB, ensuring the correct behaviour of
  1043. the two writes.
  1044. config ARM_ERRATA_742231
  1045. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1046. depends on CPU_V7 && SMP
  1047. help
  1048. This option enables the workaround for the 742231 Cortex-A9
  1049. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1050. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1051. accessing some data located in the same cache line, may get corrupted
  1052. data due to bad handling of the address hazard when the line gets
  1053. replaced from one of the CPUs at the same time as another CPU is
  1054. accessing it. This workaround sets specific bits in the diagnostic
  1055. register of the Cortex-A9 which reduces the linefill issuing
  1056. capabilities of the processor.
  1057. config PL310_ERRATA_588369
  1058. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  1059. depends on CACHE_L2X0
  1060. help
  1061. The PL310 L2 cache controller implements three types of Clean &
  1062. Invalidate maintenance operations: by Physical Address
  1063. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1064. They are architecturally defined to behave as the execution of a
  1065. clean operation followed immediately by an invalidate operation,
  1066. both performing to the same memory location. This functionality
  1067. is not correctly implemented in PL310 as clean lines are not
  1068. invalidated as a result of these operations.
  1069. config ARM_ERRATA_720789
  1070. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1071. depends on CPU_V7 && SMP
  1072. help
  1073. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1074. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1075. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1076. As a consequence of this erratum, some TLB entries which should be
  1077. invalidated are not, resulting in an incoherency in the system page
  1078. tables. The workaround changes the TLB flushing routines to invalidate
  1079. entries regardless of the ASID.
  1080. config PL310_ERRATA_727915
  1081. bool "Background Clean & Invalidate by Way operation can cause data corruption"
  1082. depends on CACHE_L2X0
  1083. help
  1084. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1085. operation (offset 0x7FC). This operation runs in background so that
  1086. PL310 can handle normal accesses while it is in progress. Under very
  1087. rare circumstances, due to this erratum, write data can be lost when
  1088. PL310 treats a cacheable write transaction during a Clean &
  1089. Invalidate by Way operation.
  1090. config ARM_ERRATA_743622
  1091. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1092. depends on CPU_V7
  1093. help
  1094. This option enables the workaround for the 743622 Cortex-A9
  1095. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1096. optimisation in the Cortex-A9 Store Buffer may lead to data
  1097. corruption. This workaround sets a specific bit in the diagnostic
  1098. register of the Cortex-A9 which disables the Store Buffer
  1099. optimisation, preventing the defect from occurring. This has no
  1100. visible impact on the overall performance or power consumption of the
  1101. processor.
  1102. config ARM_ERRATA_751472
  1103. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1104. depends on CPU_V7 && SMP
  1105. help
  1106. This option enables the workaround for the 751472 Cortex-A9 (prior
  1107. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1108. completion of a following broadcasted operation if the second
  1109. operation is received by a CPU before the ICIALLUIS has completed,
  1110. potentially leading to corrupted entries in the cache or TLB.
  1111. config ARM_ERRATA_753970
  1112. bool "ARM errata: cache sync operation may be faulty"
  1113. depends on CACHE_PL310
  1114. help
  1115. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1116. Under some condition the effect of cache sync operation on
  1117. the store buffer still remains when the operation completes.
  1118. This means that the store buffer is always asked to drain and
  1119. this prevents it from merging any further writes. The workaround
  1120. is to replace the normal offset of cache sync operation (0x730)
  1121. by another offset targeting an unmapped PL310 register 0x740.
  1122. This has the same effect as the cache sync operation: store buffer
  1123. drain and waiting for all buffers empty.
  1124. config ARM_ERRATA_754322
  1125. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1126. depends on CPU_V7
  1127. help
  1128. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1129. r3p*) erratum. A speculative memory access may cause a page table walk
  1130. which starts prior to an ASID switch but completes afterwards. This
  1131. can populate the micro-TLB with a stale entry which may be hit with
  1132. the new ASID. This workaround places two dsb instructions in the mm
  1133. switching code so that no page table walks can cross the ASID switch.
  1134. config ARM_ERRATA_754327
  1135. bool "ARM errata: no automatic Store Buffer drain"
  1136. depends on CPU_V7 && SMP
  1137. help
  1138. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1139. r2p0) erratum. The Store Buffer does not have any automatic draining
  1140. mechanism and therefore a livelock may occur if an external agent
  1141. continuously polls a memory location waiting to observe an update.
  1142. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1143. written polling loops from denying visibility of updates to memory.
  1144. config ARM_ERRATA_364296
  1145. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1146. depends on CPU_V6 && !SMP
  1147. help
  1148. This options enables the workaround for the 364296 ARM1136
  1149. r0p2 erratum (possible cache data corruption with
  1150. hit-under-miss enabled). It sets the undocumented bit 31 in
  1151. the auxiliary control register and the FI bit in the control
  1152. register, thus disabling hit-under-miss without putting the
  1153. processor into full low interrupt latency mode. ARM11MPCore
  1154. is not affected.
  1155. config ARM_ERRATA_764369
  1156. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1157. depends on CPU_V7 && SMP
  1158. help
  1159. This option enables the workaround for erratum 764369
  1160. affecting Cortex-A9 MPCore with two or more processors (all
  1161. current revisions). Under certain timing circumstances, a data
  1162. cache line maintenance operation by MVA targeting an Inner
  1163. Shareable memory region may fail to proceed up to either the
  1164. Point of Coherency or to the Point of Unification of the
  1165. system. This workaround adds a DSB instruction before the
  1166. relevant cache maintenance functions and sets a specific bit
  1167. in the diagnostic control register of the SCU.
  1168. endmenu
  1169. source "arch/arm/common/Kconfig"
  1170. menu "Bus support"
  1171. config ARM_AMBA
  1172. bool
  1173. config ISA
  1174. bool
  1175. help
  1176. Find out whether you have ISA slots on your motherboard. ISA is the
  1177. name of a bus system, i.e. the way the CPU talks to the other stuff
  1178. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1179. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1180. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1181. # Select ISA DMA controller support
  1182. config ISA_DMA
  1183. bool
  1184. select ISA_DMA_API
  1185. # Select ISA DMA interface
  1186. config ISA_DMA_API
  1187. bool
  1188. config PCI
  1189. bool "PCI support" if MIGHT_HAVE_PCI
  1190. help
  1191. Find out whether you have a PCI motherboard. PCI is the name of a
  1192. bus system, i.e. the way the CPU talks to the other stuff inside
  1193. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1194. VESA. If you have PCI, say Y, otherwise N.
  1195. config PCI_DOMAINS
  1196. bool
  1197. depends on PCI
  1198. config PCI_NANOENGINE
  1199. bool "BSE nanoEngine PCI support"
  1200. depends on SA1100_NANOENGINE
  1201. help
  1202. Enable PCI on the BSE nanoEngine board.
  1203. config PCI_SYSCALL
  1204. def_bool PCI
  1205. # Select the host bridge type
  1206. config PCI_HOST_VIA82C505
  1207. bool
  1208. depends on PCI && ARCH_SHARK
  1209. default y
  1210. config PCI_HOST_ITE8152
  1211. bool
  1212. depends on PCI && MACH_ARMCORE
  1213. default y
  1214. select DMABOUNCE
  1215. source "drivers/pci/Kconfig"
  1216. source "drivers/pcmcia/Kconfig"
  1217. endmenu
  1218. menu "Kernel Features"
  1219. source "kernel/time/Kconfig"
  1220. config SMP
  1221. bool "Symmetric Multi-Processing"
  1222. depends on CPU_V6K || CPU_V7
  1223. depends on GENERIC_CLOCKEVENTS
  1224. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1225. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1226. ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
  1227. ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE || ARCH_HIGHBANK || SOC_IMX6Q
  1228. depends on MMU
  1229. select USE_GENERIC_SMP_HELPERS
  1230. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1231. help
  1232. This enables support for systems with more than one CPU. If you have
  1233. a system with only one CPU, like most personal computers, say N. If
  1234. you have a system with more than one CPU, say Y.
  1235. If you say N here, the kernel will run on single and multiprocessor
  1236. machines, but will use only one CPU of a multiprocessor machine. If
  1237. you say Y here, the kernel will run on many, but not all, single
  1238. processor machines. On a single processor machine, the kernel will
  1239. run faster if you say N here.
  1240. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1241. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1242. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1243. If you don't know what to do here, say N.
  1244. config SMP_ON_UP
  1245. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1246. depends on EXPERIMENTAL
  1247. depends on SMP && !XIP_KERNEL
  1248. default y
  1249. help
  1250. SMP kernels contain instructions which fail on non-SMP processors.
  1251. Enabling this option allows the kernel to modify itself to make
  1252. these instructions safe. Disabling it allows about 1K of space
  1253. savings.
  1254. If you don't know what to do here, say Y.
  1255. config ARM_CPU_TOPOLOGY
  1256. bool "Support cpu topology definition"
  1257. depends on SMP && CPU_V7
  1258. default y
  1259. help
  1260. Support ARM cpu topology definition. The MPIDR register defines
  1261. affinity between processors which is then used to describe the cpu
  1262. topology of an ARM System.
  1263. config SCHED_MC
  1264. bool "Multi-core scheduler support"
  1265. depends on ARM_CPU_TOPOLOGY
  1266. help
  1267. Multi-core scheduler support improves the CPU scheduler's decision
  1268. making when dealing with multi-core CPU chips at a cost of slightly
  1269. increased overhead in some places. If unsure say N here.
  1270. config SCHED_SMT
  1271. bool "SMT scheduler support"
  1272. depends on ARM_CPU_TOPOLOGY
  1273. help
  1274. Improves the CPU scheduler's decision making when dealing with
  1275. MultiThreading at a cost of slightly increased overhead in some
  1276. places. If unsure say N here.
  1277. config HAVE_ARM_SCU
  1278. bool
  1279. help
  1280. This option enables support for the ARM system coherency unit
  1281. config HAVE_ARM_TWD
  1282. bool
  1283. depends on SMP
  1284. select TICK_ONESHOT
  1285. help
  1286. This options enables support for the ARM timer and watchdog unit
  1287. choice
  1288. prompt "Memory split"
  1289. default VMSPLIT_3G
  1290. help
  1291. Select the desired split between kernel and user memory.
  1292. If you are not absolutely sure what you are doing, leave this
  1293. option alone!
  1294. config VMSPLIT_3G
  1295. bool "3G/1G user/kernel split"
  1296. config VMSPLIT_2G
  1297. bool "2G/2G user/kernel split"
  1298. config VMSPLIT_1G
  1299. bool "1G/3G user/kernel split"
  1300. endchoice
  1301. config PAGE_OFFSET
  1302. hex
  1303. default 0x40000000 if VMSPLIT_1G
  1304. default 0x80000000 if VMSPLIT_2G
  1305. default 0xC0000000
  1306. config NR_CPUS
  1307. int "Maximum number of CPUs (2-32)"
  1308. range 2 32
  1309. depends on SMP
  1310. default "4"
  1311. config HOTPLUG_CPU
  1312. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1313. depends on SMP && HOTPLUG && EXPERIMENTAL
  1314. help
  1315. Say Y here to experiment with turning CPUs off and on. CPUs
  1316. can be controlled through /sys/devices/system/cpu.
  1317. config LOCAL_TIMERS
  1318. bool "Use local timer interrupts"
  1319. depends on SMP
  1320. default y
  1321. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1322. help
  1323. Enable support for local timers on SMP platforms, rather then the
  1324. legacy IPI broadcast method. Local timers allows the system
  1325. accounting to be spread across the timer interval, preventing a
  1326. "thundering herd" at every timer tick.
  1327. source kernel/Kconfig.preempt
  1328. config HZ
  1329. int
  1330. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1331. ARCH_S5PV210 || ARCH_EXYNOS4
  1332. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1333. default AT91_TIMER_HZ if ARCH_AT91
  1334. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1335. default 100
  1336. config THUMB2_KERNEL
  1337. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1338. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1339. select AEABI
  1340. select ARM_ASM_UNIFIED
  1341. select ARM_UNWIND
  1342. help
  1343. By enabling this option, the kernel will be compiled in
  1344. Thumb-2 mode. A compiler/assembler that understand the unified
  1345. ARM-Thumb syntax is needed.
  1346. If unsure, say N.
  1347. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1348. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1349. depends on THUMB2_KERNEL && MODULES
  1350. default y
  1351. help
  1352. Various binutils versions can resolve Thumb-2 branches to
  1353. locally-defined, preemptible global symbols as short-range "b.n"
  1354. branch instructions.
  1355. This is a problem, because there's no guarantee the final
  1356. destination of the symbol, or any candidate locations for a
  1357. trampoline, are within range of the branch. For this reason, the
  1358. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1359. relocation in modules at all, and it makes little sense to add
  1360. support.
  1361. The symptom is that the kernel fails with an "unsupported
  1362. relocation" error when loading some modules.
  1363. Until fixed tools are available, passing
  1364. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1365. code which hits this problem, at the cost of a bit of extra runtime
  1366. stack usage in some cases.
  1367. The problem is described in more detail at:
  1368. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1369. Only Thumb-2 kernels are affected.
  1370. Unless you are sure your tools don't have this problem, say Y.
  1371. config ARM_ASM_UNIFIED
  1372. bool
  1373. config AEABI
  1374. bool "Use the ARM EABI to compile the kernel"
  1375. help
  1376. This option allows for the kernel to be compiled using the latest
  1377. ARM ABI (aka EABI). This is only useful if you are using a user
  1378. space environment that is also compiled with EABI.
  1379. Since there are major incompatibilities between the legacy ABI and
  1380. EABI, especially with regard to structure member alignment, this
  1381. option also changes the kernel syscall calling convention to
  1382. disambiguate both ABIs and allow for backward compatibility support
  1383. (selected with CONFIG_OABI_COMPAT).
  1384. To use this you need GCC version 4.0.0 or later.
  1385. config OABI_COMPAT
  1386. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1387. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1388. default y
  1389. help
  1390. This option preserves the old syscall interface along with the
  1391. new (ARM EABI) one. It also provides a compatibility layer to
  1392. intercept syscalls that have structure arguments which layout
  1393. in memory differs between the legacy ABI and the new ARM EABI
  1394. (only for non "thumb" binaries). This option adds a tiny
  1395. overhead to all syscalls and produces a slightly larger kernel.
  1396. If you know you'll be using only pure EABI user space then you
  1397. can say N here. If this option is not selected and you attempt
  1398. to execute a legacy ABI binary then the result will be
  1399. UNPREDICTABLE (in fact it can be predicted that it won't work
  1400. at all). If in doubt say Y.
  1401. config ARCH_HAS_HOLES_MEMORYMODEL
  1402. bool
  1403. config ARCH_SPARSEMEM_ENABLE
  1404. bool
  1405. config ARCH_SPARSEMEM_DEFAULT
  1406. def_bool ARCH_SPARSEMEM_ENABLE
  1407. config ARCH_SELECT_MEMORY_MODEL
  1408. def_bool ARCH_SPARSEMEM_ENABLE
  1409. config HAVE_ARCH_PFN_VALID
  1410. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1411. config HIGHMEM
  1412. bool "High Memory Support"
  1413. depends on MMU
  1414. help
  1415. The address space of ARM processors is only 4 Gigabytes large
  1416. and it has to accommodate user address space, kernel address
  1417. space as well as some memory mapped IO. That means that, if you
  1418. have a large amount of physical memory and/or IO, not all of the
  1419. memory can be "permanently mapped" by the kernel. The physical
  1420. memory that is not permanently mapped is called "high memory".
  1421. Depending on the selected kernel/user memory split, minimum
  1422. vmalloc space and actual amount of RAM, you may not need this
  1423. option which should result in a slightly faster kernel.
  1424. If unsure, say n.
  1425. config HIGHPTE
  1426. bool "Allocate 2nd-level pagetables from highmem"
  1427. depends on HIGHMEM
  1428. config HW_PERF_EVENTS
  1429. bool "Enable hardware performance counter support for perf events"
  1430. depends on PERF_EVENTS && CPU_HAS_PMU
  1431. default y
  1432. help
  1433. Enable hardware performance counter support for perf events. If
  1434. disabled, perf events will use software events only.
  1435. source "mm/Kconfig"
  1436. config FORCE_MAX_ZONEORDER
  1437. int "Maximum zone order" if ARCH_SHMOBILE
  1438. range 11 64 if ARCH_SHMOBILE
  1439. default "9" if SA1111
  1440. default "11"
  1441. help
  1442. The kernel memory allocator divides physically contiguous memory
  1443. blocks into "zones", where each zone is a power of two number of
  1444. pages. This option selects the largest power of two that the kernel
  1445. keeps in the memory allocator. If you need to allocate very large
  1446. blocks of physically contiguous memory, then you may need to
  1447. increase this value.
  1448. This config option is actually maximum order plus one. For example,
  1449. a value of 11 means that the largest free memory block is 2^10 pages.
  1450. config LEDS
  1451. bool "Timer and CPU usage LEDs"
  1452. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1453. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1454. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1455. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1456. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1457. ARCH_AT91 || ARCH_DAVINCI || \
  1458. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1459. help
  1460. If you say Y here, the LEDs on your machine will be used
  1461. to provide useful information about your current system status.
  1462. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1463. be able to select which LEDs are active using the options below. If
  1464. you are compiling a kernel for the EBSA-110 or the LART however, the
  1465. red LED will simply flash regularly to indicate that the system is
  1466. still functional. It is safe to say Y here if you have a CATS
  1467. system, but the driver will do nothing.
  1468. config LEDS_TIMER
  1469. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1470. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1471. || MACH_OMAP_PERSEUS2
  1472. depends on LEDS
  1473. depends on !GENERIC_CLOCKEVENTS
  1474. default y if ARCH_EBSA110
  1475. help
  1476. If you say Y here, one of the system LEDs (the green one on the
  1477. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1478. will flash regularly to indicate that the system is still
  1479. operational. This is mainly useful to kernel hackers who are
  1480. debugging unstable kernels.
  1481. The LART uses the same LED for both Timer LED and CPU usage LED
  1482. functions. You may choose to use both, but the Timer LED function
  1483. will overrule the CPU usage LED.
  1484. config LEDS_CPU
  1485. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1486. !ARCH_OMAP) \
  1487. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1488. || MACH_OMAP_PERSEUS2
  1489. depends on LEDS
  1490. help
  1491. If you say Y here, the red LED will be used to give a good real
  1492. time indication of CPU usage, by lighting whenever the idle task
  1493. is not currently executing.
  1494. The LART uses the same LED for both Timer LED and CPU usage LED
  1495. functions. You may choose to use both, but the Timer LED function
  1496. will overrule the CPU usage LED.
  1497. config ALIGNMENT_TRAP
  1498. bool
  1499. depends on CPU_CP15_MMU
  1500. default y if !ARCH_EBSA110
  1501. select HAVE_PROC_CPU if PROC_FS
  1502. help
  1503. ARM processors cannot fetch/store information which is not
  1504. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1505. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1506. fetch/store instructions will be emulated in software if you say
  1507. here, which has a severe performance impact. This is necessary for
  1508. correct operation of some network protocols. With an IP-only
  1509. configuration it is safe to say N, otherwise say Y.
  1510. config UACCESS_WITH_MEMCPY
  1511. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1512. depends on MMU && EXPERIMENTAL
  1513. default y if CPU_FEROCEON
  1514. help
  1515. Implement faster copy_to_user and clear_user methods for CPU
  1516. cores where a 8-word STM instruction give significantly higher
  1517. memory write throughput than a sequence of individual 32bit stores.
  1518. A possible side effect is a slight increase in scheduling latency
  1519. between threads sharing the same address space if they invoke
  1520. such copy operations with large buffers.
  1521. However, if the CPU data cache is using a write-allocate mode,
  1522. this option is unlikely to provide any performance gain.
  1523. config SECCOMP
  1524. bool
  1525. prompt "Enable seccomp to safely compute untrusted bytecode"
  1526. ---help---
  1527. This kernel feature is useful for number crunching applications
  1528. that may need to compute untrusted bytecode during their
  1529. execution. By using pipes or other transports made available to
  1530. the process as file descriptors supporting the read/write
  1531. syscalls, it's possible to isolate those applications in
  1532. their own address space using seccomp. Once seccomp is
  1533. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1534. and the task is only allowed to execute a few safe syscalls
  1535. defined by each seccomp mode.
  1536. config CC_STACKPROTECTOR
  1537. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1538. depends on EXPERIMENTAL
  1539. help
  1540. This option turns on the -fstack-protector GCC feature. This
  1541. feature puts, at the beginning of functions, a canary value on
  1542. the stack just before the return address, and validates
  1543. the value just before actually returning. Stack based buffer
  1544. overflows (that need to overwrite this return address) now also
  1545. overwrite the canary, which gets detected and the attack is then
  1546. neutralized via a kernel panic.
  1547. This feature requires gcc version 4.2 or above.
  1548. config DEPRECATED_PARAM_STRUCT
  1549. bool "Provide old way to pass kernel parameters"
  1550. help
  1551. This was deprecated in 2001 and announced to live on for 5 years.
  1552. Some old boot loaders still use this way.
  1553. endmenu
  1554. menu "Boot options"
  1555. config USE_OF
  1556. bool "Flattened Device Tree support"
  1557. select OF
  1558. select OF_EARLY_FLATTREE
  1559. select IRQ_DOMAIN
  1560. help
  1561. Include support for flattened device tree machine descriptions.
  1562. # Compressed boot loader in ROM. Yes, we really want to ask about
  1563. # TEXT and BSS so we preserve their values in the config files.
  1564. config ZBOOT_ROM_TEXT
  1565. hex "Compressed ROM boot loader base address"
  1566. default "0"
  1567. help
  1568. The physical address at which the ROM-able zImage is to be
  1569. placed in the target. Platforms which normally make use of
  1570. ROM-able zImage formats normally set this to a suitable
  1571. value in their defconfig file.
  1572. If ZBOOT_ROM is not enabled, this has no effect.
  1573. config ZBOOT_ROM_BSS
  1574. hex "Compressed ROM boot loader BSS address"
  1575. default "0"
  1576. help
  1577. The base address of an area of read/write memory in the target
  1578. for the ROM-able zImage which must be available while the
  1579. decompressor is running. It must be large enough to hold the
  1580. entire decompressed kernel plus an additional 128 KiB.
  1581. Platforms which normally make use of ROM-able zImage formats
  1582. normally set this to a suitable value in their defconfig file.
  1583. If ZBOOT_ROM is not enabled, this has no effect.
  1584. config ZBOOT_ROM
  1585. bool "Compressed boot loader in ROM/flash"
  1586. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1587. help
  1588. Say Y here if you intend to execute your compressed kernel image
  1589. (zImage) directly from ROM or flash. If unsure, say N.
  1590. choice
  1591. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1592. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1593. default ZBOOT_ROM_NONE
  1594. help
  1595. Include experimental SD/MMC loading code in the ROM-able zImage.
  1596. With this enabled it is possible to write the the ROM-able zImage
  1597. kernel image to an MMC or SD card and boot the kernel straight
  1598. from the reset vector. At reset the processor Mask ROM will load
  1599. the first part of the the ROM-able zImage which in turn loads the
  1600. rest the kernel image to RAM.
  1601. config ZBOOT_ROM_NONE
  1602. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1603. help
  1604. Do not load image from SD or MMC
  1605. config ZBOOT_ROM_MMCIF
  1606. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1607. help
  1608. Load image from MMCIF hardware block.
  1609. config ZBOOT_ROM_SH_MOBILE_SDHI
  1610. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1611. help
  1612. Load image from SDHI hardware block
  1613. endchoice
  1614. config ARM_APPENDED_DTB
  1615. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1616. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1617. help
  1618. With this option, the boot code will look for a device tree binary
  1619. (DTB) appended to zImage
  1620. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1621. This is meant as a backward compatibility convenience for those
  1622. systems with a bootloader that can't be upgraded to accommodate
  1623. the documented boot protocol using a device tree.
  1624. Beware that there is very little in terms of protection against
  1625. this option being confused by leftover garbage in memory that might
  1626. look like a DTB header after a reboot if no actual DTB is appended
  1627. to zImage. Do not leave this option active in a production kernel
  1628. if you don't intend to always append a DTB. Proper passing of the
  1629. location into r2 of a bootloader provided DTB is always preferable
  1630. to this option.
  1631. config ARM_ATAG_DTB_COMPAT
  1632. bool "Supplement the appended DTB with traditional ATAG information"
  1633. depends on ARM_APPENDED_DTB
  1634. help
  1635. Some old bootloaders can't be updated to a DTB capable one, yet
  1636. they provide ATAGs with memory configuration, the ramdisk address,
  1637. the kernel cmdline string, etc. Such information is dynamically
  1638. provided by the bootloader and can't always be stored in a static
  1639. DTB. To allow a device tree enabled kernel to be used with such
  1640. bootloaders, this option allows zImage to extract the information
  1641. from the ATAG list and store it at run time into the appended DTB.
  1642. config CMDLINE
  1643. string "Default kernel command string"
  1644. default ""
  1645. help
  1646. On some architectures (EBSA110 and CATS), there is currently no way
  1647. for the boot loader to pass arguments to the kernel. For these
  1648. architectures, you should supply some command-line options at build
  1649. time by entering them here. As a minimum, you should specify the
  1650. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1651. choice
  1652. prompt "Kernel command line type" if CMDLINE != ""
  1653. default CMDLINE_FROM_BOOTLOADER
  1654. config CMDLINE_FROM_BOOTLOADER
  1655. bool "Use bootloader kernel arguments if available"
  1656. help
  1657. Uses the command-line options passed by the boot loader. If
  1658. the boot loader doesn't provide any, the default kernel command
  1659. string provided in CMDLINE will be used.
  1660. config CMDLINE_EXTEND
  1661. bool "Extend bootloader kernel arguments"
  1662. help
  1663. The command-line arguments provided by the boot loader will be
  1664. appended to the default kernel command string.
  1665. config CMDLINE_FORCE
  1666. bool "Always use the default kernel command string"
  1667. help
  1668. Always use the default kernel command string, even if the boot
  1669. loader passes other arguments to the kernel.
  1670. This is useful if you cannot or don't want to change the
  1671. command-line options your boot loader passes to the kernel.
  1672. endchoice
  1673. config XIP_KERNEL
  1674. bool "Kernel Execute-In-Place from ROM"
  1675. depends on !ZBOOT_ROM
  1676. help
  1677. Execute-In-Place allows the kernel to run from non-volatile storage
  1678. directly addressable by the CPU, such as NOR flash. This saves RAM
  1679. space since the text section of the kernel is not loaded from flash
  1680. to RAM. Read-write sections, such as the data section and stack,
  1681. are still copied to RAM. The XIP kernel is not compressed since
  1682. it has to run directly from flash, so it will take more space to
  1683. store it. The flash address used to link the kernel object files,
  1684. and for storing it, is configuration dependent. Therefore, if you
  1685. say Y here, you must know the proper physical address where to
  1686. store the kernel image depending on your own flash memory usage.
  1687. Also note that the make target becomes "make xipImage" rather than
  1688. "make zImage" or "make Image". The final kernel binary to put in
  1689. ROM memory will be arch/arm/boot/xipImage.
  1690. If unsure, say N.
  1691. config XIP_PHYS_ADDR
  1692. hex "XIP Kernel Physical Location"
  1693. depends on XIP_KERNEL
  1694. default "0x00080000"
  1695. help
  1696. This is the physical address in your flash memory the kernel will
  1697. be linked for and stored to. This address is dependent on your
  1698. own flash usage.
  1699. config KEXEC
  1700. bool "Kexec system call (EXPERIMENTAL)"
  1701. depends on EXPERIMENTAL
  1702. help
  1703. kexec is a system call that implements the ability to shutdown your
  1704. current kernel, and to start another kernel. It is like a reboot
  1705. but it is independent of the system firmware. And like a reboot
  1706. you can start any kernel with it, not just Linux.
  1707. It is an ongoing process to be certain the hardware in a machine
  1708. is properly shutdown, so do not be surprised if this code does not
  1709. initially work for you. It may help to enable device hotplugging
  1710. support.
  1711. config ATAGS_PROC
  1712. bool "Export atags in procfs"
  1713. depends on KEXEC
  1714. default y
  1715. help
  1716. Should the atags used to boot the kernel be exported in an "atags"
  1717. file in procfs. Useful with kexec.
  1718. config CRASH_DUMP
  1719. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1720. depends on EXPERIMENTAL
  1721. help
  1722. Generate crash dump after being started by kexec. This should
  1723. be normally only set in special crash dump kernels which are
  1724. loaded in the main kernel with kexec-tools into a specially
  1725. reserved region and then later executed after a crash by
  1726. kdump/kexec. The crash dump kernel must be compiled to a
  1727. memory address not used by the main kernel
  1728. For more details see Documentation/kdump/kdump.txt
  1729. config AUTO_ZRELADDR
  1730. bool "Auto calculation of the decompressed kernel image address"
  1731. depends on !ZBOOT_ROM && !ARCH_U300
  1732. help
  1733. ZRELADDR is the physical address where the decompressed kernel
  1734. image will be placed. If AUTO_ZRELADDR is selected, the address
  1735. will be determined at run-time by masking the current IP with
  1736. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1737. from start of memory.
  1738. endmenu
  1739. menu "CPU Power Management"
  1740. if ARCH_HAS_CPUFREQ
  1741. source "drivers/cpufreq/Kconfig"
  1742. config CPU_FREQ_IMX
  1743. tristate "CPUfreq driver for i.MX CPUs"
  1744. depends on ARCH_MXC && CPU_FREQ
  1745. help
  1746. This enables the CPUfreq driver for i.MX CPUs.
  1747. config CPU_FREQ_SA1100
  1748. bool
  1749. config CPU_FREQ_SA1110
  1750. bool
  1751. config CPU_FREQ_INTEGRATOR
  1752. tristate "CPUfreq driver for ARM Integrator CPUs"
  1753. depends on ARCH_INTEGRATOR && CPU_FREQ
  1754. default y
  1755. help
  1756. This enables the CPUfreq driver for ARM Integrator CPUs.
  1757. For details, take a look at <file:Documentation/cpu-freq>.
  1758. If in doubt, say Y.
  1759. config CPU_FREQ_PXA
  1760. bool
  1761. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1762. default y
  1763. select CPU_FREQ_TABLE
  1764. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1765. config CPU_FREQ_S3C
  1766. bool
  1767. help
  1768. Internal configuration node for common cpufreq on Samsung SoC
  1769. config CPU_FREQ_S3C24XX
  1770. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1771. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1772. select CPU_FREQ_S3C
  1773. help
  1774. This enables the CPUfreq driver for the Samsung S3C24XX family
  1775. of CPUs.
  1776. For details, take a look at <file:Documentation/cpu-freq>.
  1777. If in doubt, say N.
  1778. config CPU_FREQ_S3C24XX_PLL
  1779. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1780. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1781. help
  1782. Compile in support for changing the PLL frequency from the
  1783. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1784. after a frequency change, so by default it is not enabled.
  1785. This also means that the PLL tables for the selected CPU(s) will
  1786. be built which may increase the size of the kernel image.
  1787. config CPU_FREQ_S3C24XX_DEBUG
  1788. bool "Debug CPUfreq Samsung driver core"
  1789. depends on CPU_FREQ_S3C24XX
  1790. help
  1791. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1792. config CPU_FREQ_S3C24XX_IODEBUG
  1793. bool "Debug CPUfreq Samsung driver IO timing"
  1794. depends on CPU_FREQ_S3C24XX
  1795. help
  1796. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1797. config CPU_FREQ_S3C24XX_DEBUGFS
  1798. bool "Export debugfs for CPUFreq"
  1799. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1800. help
  1801. Export status information via debugfs.
  1802. endif
  1803. source "drivers/cpuidle/Kconfig"
  1804. endmenu
  1805. menu "Floating point emulation"
  1806. comment "At least one emulation must be selected"
  1807. config FPE_NWFPE
  1808. bool "NWFPE math emulation"
  1809. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1810. ---help---
  1811. Say Y to include the NWFPE floating point emulator in the kernel.
  1812. This is necessary to run most binaries. Linux does not currently
  1813. support floating point hardware so you need to say Y here even if
  1814. your machine has an FPA or floating point co-processor podule.
  1815. You may say N here if you are going to load the Acorn FPEmulator
  1816. early in the bootup.
  1817. config FPE_NWFPE_XP
  1818. bool "Support extended precision"
  1819. depends on FPE_NWFPE
  1820. help
  1821. Say Y to include 80-bit support in the kernel floating-point
  1822. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1823. Note that gcc does not generate 80-bit operations by default,
  1824. so in most cases this option only enlarges the size of the
  1825. floating point emulator without any good reason.
  1826. You almost surely want to say N here.
  1827. config FPE_FASTFPE
  1828. bool "FastFPE math emulation (EXPERIMENTAL)"
  1829. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1830. ---help---
  1831. Say Y here to include the FAST floating point emulator in the kernel.
  1832. This is an experimental much faster emulator which now also has full
  1833. precision for the mantissa. It does not support any exceptions.
  1834. It is very simple, and approximately 3-6 times faster than NWFPE.
  1835. It should be sufficient for most programs. It may be not suitable
  1836. for scientific calculations, but you have to check this for yourself.
  1837. If you do not feel you need a faster FP emulation you should better
  1838. choose NWFPE.
  1839. config VFP
  1840. bool "VFP-format floating point maths"
  1841. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1842. help
  1843. Say Y to include VFP support code in the kernel. This is needed
  1844. if your hardware includes a VFP unit.
  1845. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1846. release notes and additional status information.
  1847. Say N if your target does not have VFP hardware.
  1848. config VFPv3
  1849. bool
  1850. depends on VFP
  1851. default y if CPU_V7
  1852. config NEON
  1853. bool "Advanced SIMD (NEON) Extension support"
  1854. depends on VFPv3 && CPU_V7
  1855. help
  1856. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1857. Extension.
  1858. endmenu
  1859. menu "Userspace binary formats"
  1860. source "fs/Kconfig.binfmt"
  1861. config ARTHUR
  1862. tristate "RISC OS personality"
  1863. depends on !AEABI
  1864. help
  1865. Say Y here to include the kernel code necessary if you want to run
  1866. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1867. experimental; if this sounds frightening, say N and sleep in peace.
  1868. You can also say M here to compile this support as a module (which
  1869. will be called arthur).
  1870. endmenu
  1871. menu "Power management options"
  1872. source "kernel/power/Kconfig"
  1873. config ARCH_SUSPEND_POSSIBLE
  1874. depends on !ARCH_S5PC100
  1875. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1876. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1877. def_bool y
  1878. config ARM_CPU_SUSPEND
  1879. def_bool PM_SLEEP
  1880. endmenu
  1881. source "net/Kconfig"
  1882. source "drivers/Kconfig"
  1883. source "fs/Kconfig"
  1884. source "arch/arm/Kconfig.debug"
  1885. source "security/Kconfig"
  1886. source "crypto/Kconfig"
  1887. source "lib/Kconfig"