Kconfig 65 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361136213631364136513661367136813691370137113721373137413751376137713781379138013811382138313841385138613871388138913901391139213931394139513961397139813991400140114021403140414051406140714081409141014111412141314141415141614171418141914201421142214231424142514261427142814291430143114321433143414351436143714381439144014411442144314441445144614471448144914501451145214531454145514561457145814591460146114621463146414651466146714681469147014711472147314741475147614771478147914801481148214831484148514861487148814891490149114921493149414951496149714981499150015011502150315041505150615071508150915101511151215131514151515161517151815191520152115221523152415251526152715281529153015311532153315341535153615371538153915401541154215431544154515461547154815491550155115521553155415551556155715581559156015611562156315641565156615671568156915701571157215731574157515761577157815791580158115821583158415851586158715881589159015911592159315941595159615971598159916001601160216031604160516061607160816091610161116121613161416151616161716181619162016211622162316241625162616271628162916301631163216331634163516361637163816391640164116421643164416451646164716481649165016511652165316541655165616571658165916601661166216631664166516661667166816691670167116721673167416751676167716781679168016811682168316841685168616871688168916901691169216931694169516961697169816991700170117021703170417051706170717081709171017111712171317141715171617171718171917201721172217231724172517261727172817291730173117321733173417351736173717381739174017411742174317441745174617471748174917501751175217531754175517561757175817591760176117621763176417651766176717681769177017711772177317741775177617771778177917801781178217831784178517861787178817891790179117921793179417951796179717981799180018011802180318041805180618071808180918101811181218131814181518161817181818191820182118221823182418251826182718281829183018311832183318341835183618371838183918401841184218431844184518461847184818491850185118521853185418551856185718581859186018611862186318641865186618671868186918701871187218731874187518761877187818791880188118821883188418851886188718881889189018911892189318941895189618971898189919001901190219031904190519061907190819091910191119121913191419151916191719181919192019211922192319241925192619271928192919301931193219331934193519361937193819391940194119421943194419451946194719481949195019511952195319541955195619571958195919601961196219631964196519661967196819691970197119721973197419751976197719781979198019811982198319841985198619871988198919901991199219931994199519961997199819992000200120022003200420052006200720082009201020112012201320142015201620172018201920202021202220232024202520262027202820292030203120322033203420352036203720382039204020412042204320442045204620472048204920502051205220532054205520562057205820592060206120622063206420652066206720682069207020712072207320742075207620772078207920802081208220832084208520862087208820892090209120922093209420952096209720982099210021012102210321042105210621072108210921102111211221132114211521162117211821192120212121222123212421252126212721282129213021312132213321342135213621372138213921402141214221432144214521462147214821492150215121522153215421552156215721582159216021612162216321642165216621672168216921702171217221732174217521762177217821792180218121822183218421852186218721882189219021912192219321942195219621972198219922002201220222032204220522062207220822092210221122122213221422152216221722182219222022212222222322242225222622272228222922302231223222332234223522362237223822392240
  1. config ARM
  2. bool
  3. default y
  4. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  5. select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  6. select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
  7. select ARCH_HAVE_CUSTOM_GPIO_H
  8. select ARCH_WANT_IPC_PARSE_VERSION
  9. select BUILDTIME_EXTABLE_SORT if MMU
  10. select CLONE_BACKWARDS
  11. select CPU_PM if (SUSPEND || CPU_IDLE)
  12. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
  13. select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
  14. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  15. select GENERIC_IDLE_POLL_SETUP
  16. select GENERIC_IRQ_PROBE
  17. select GENERIC_IRQ_SHOW
  18. select GENERIC_PCI_IOMAP
  19. select GENERIC_SCHED_CLOCK
  20. select GENERIC_SMP_IDLE_THREAD
  21. select GENERIC_STRNCPY_FROM_USER
  22. select GENERIC_STRNLEN_USER
  23. select HARDIRQS_SW_RESEND
  24. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  25. select HAVE_ARCH_KGDB
  26. select HAVE_ARCH_SECCOMP_FILTER
  27. select HAVE_ARCH_TRACEHOOK
  28. select HAVE_BPF_JIT
  29. select HAVE_CONTEXT_TRACKING
  30. select HAVE_C_RECORDMCOUNT
  31. select HAVE_DEBUG_KMEMLEAK
  32. select HAVE_DMA_API_DEBUG
  33. select HAVE_DMA_ATTRS
  34. select HAVE_DMA_CONTIGUOUS if MMU
  35. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  36. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  37. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  38. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  39. select HAVE_GENERIC_DMA_COHERENT
  40. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  41. select HAVE_IDE if PCI || ISA || PCMCIA
  42. select HAVE_IRQ_TIME_ACCOUNTING
  43. select HAVE_KERNEL_GZIP
  44. select HAVE_KERNEL_LZ4
  45. select HAVE_KERNEL_LZMA
  46. select HAVE_KERNEL_LZO
  47. select HAVE_KERNEL_XZ
  48. select HAVE_KPROBES if !XIP_KERNEL
  49. select HAVE_KRETPROBES if (HAVE_KPROBES)
  50. select HAVE_MEMBLOCK
  51. select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
  52. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  53. select HAVE_PERF_EVENTS
  54. select HAVE_REGS_AND_STACK_ACCESS_API
  55. select HAVE_SYSCALL_TRACEPOINTS
  56. select HAVE_UID16
  57. select IRQ_FORCED_THREADING
  58. select KTIME_SCALAR
  59. select MODULES_USE_ELF_REL
  60. select OLD_SIGACTION
  61. select OLD_SIGSUSPEND3
  62. select PERF_USE_VMALLOC
  63. select RTC_LIB
  64. select SYS_SUPPORTS_APM_EMULATION
  65. # Above selects are sorted alphabetically; please add new ones
  66. # according to that. Thanks.
  67. help
  68. The ARM series is a line of low-power-consumption RISC chip designs
  69. licensed by ARM Ltd and targeted at embedded applications and
  70. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  71. manufactured, but legacy ARM-based PC hardware remains popular in
  72. Europe. There is an ARM Linux project with a web page at
  73. <http://www.arm.linux.org.uk/>.
  74. config ARM_HAS_SG_CHAIN
  75. bool
  76. config NEED_SG_DMA_LENGTH
  77. bool
  78. config ARM_DMA_USE_IOMMU
  79. bool
  80. select ARM_HAS_SG_CHAIN
  81. select NEED_SG_DMA_LENGTH
  82. if ARM_DMA_USE_IOMMU
  83. config ARM_DMA_IOMMU_ALIGNMENT
  84. int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
  85. range 4 9
  86. default 8
  87. help
  88. DMA mapping framework by default aligns all buffers to the smallest
  89. PAGE_SIZE order which is greater than or equal to the requested buffer
  90. size. This works well for buffers up to a few hundreds kilobytes, but
  91. for larger buffers it just a waste of address space. Drivers which has
  92. relatively small addressing window (like 64Mib) might run out of
  93. virtual space with just a few allocations.
  94. With this parameter you can specify the maximum PAGE_SIZE order for
  95. DMA IOMMU buffers. Larger buffers will be aligned only to this
  96. specified order. The order is expressed as a power of two multiplied
  97. by the PAGE_SIZE.
  98. endif
  99. config HAVE_PWM
  100. bool
  101. config MIGHT_HAVE_PCI
  102. bool
  103. config SYS_SUPPORTS_APM_EMULATION
  104. bool
  105. config HAVE_TCM
  106. bool
  107. select GENERIC_ALLOCATOR
  108. config HAVE_PROC_CPU
  109. bool
  110. config NO_IOPORT
  111. bool
  112. config EISA
  113. bool
  114. ---help---
  115. The Extended Industry Standard Architecture (EISA) bus was
  116. developed as an open alternative to the IBM MicroChannel bus.
  117. The EISA bus provided some of the features of the IBM MicroChannel
  118. bus while maintaining backward compatibility with cards made for
  119. the older ISA bus. The EISA bus saw limited use between 1988 and
  120. 1995 when it was made obsolete by the PCI bus.
  121. Say Y here if you are building a kernel for an EISA-based machine.
  122. Otherwise, say N.
  123. config SBUS
  124. bool
  125. config STACKTRACE_SUPPORT
  126. bool
  127. default y
  128. config HAVE_LATENCYTOP_SUPPORT
  129. bool
  130. depends on !SMP
  131. default y
  132. config LOCKDEP_SUPPORT
  133. bool
  134. default y
  135. config TRACE_IRQFLAGS_SUPPORT
  136. bool
  137. default y
  138. config RWSEM_GENERIC_SPINLOCK
  139. bool
  140. default y
  141. config RWSEM_XCHGADD_ALGORITHM
  142. bool
  143. config ARCH_HAS_ILOG2_U32
  144. bool
  145. config ARCH_HAS_ILOG2_U64
  146. bool
  147. config ARCH_HAS_CPUFREQ
  148. bool
  149. help
  150. Internal node to signify that the ARCH has CPUFREQ support
  151. and that the relevant menu configurations are displayed for
  152. it.
  153. config ARCH_HAS_BANDGAP
  154. bool
  155. config GENERIC_HWEIGHT
  156. bool
  157. default y
  158. config GENERIC_CALIBRATE_DELAY
  159. bool
  160. default y
  161. config ARCH_MAY_HAVE_PC_FDC
  162. bool
  163. config ZONE_DMA
  164. bool
  165. config NEED_DMA_MAP_STATE
  166. def_bool y
  167. config ARCH_HAS_DMA_SET_COHERENT_MASK
  168. bool
  169. config GENERIC_ISA_DMA
  170. bool
  171. config FIQ
  172. bool
  173. config NEED_RET_TO_USER
  174. bool
  175. config ARCH_MTD_XIP
  176. bool
  177. config VECTORS_BASE
  178. hex
  179. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  180. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  181. default 0x00000000
  182. help
  183. The base address of exception vectors. This must be two pages
  184. in size.
  185. config ARM_PATCH_PHYS_VIRT
  186. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  187. default y
  188. depends on !XIP_KERNEL && MMU
  189. depends on !ARCH_REALVIEW || !SPARSEMEM
  190. help
  191. Patch phys-to-virt and virt-to-phys translation functions at
  192. boot and module load time according to the position of the
  193. kernel in system memory.
  194. This can only be used with non-XIP MMU kernels where the base
  195. of physical memory is at a 16MB boundary.
  196. Only disable this option if you know that you do not require
  197. this feature (eg, building a kernel for a single machine) and
  198. you need to shrink the kernel to the minimal size.
  199. config NEED_MACH_GPIO_H
  200. bool
  201. help
  202. Select this when mach/gpio.h is required to provide special
  203. definitions for this platform. The need for mach/gpio.h should
  204. be avoided when possible.
  205. config NEED_MACH_IO_H
  206. bool
  207. help
  208. Select this when mach/io.h is required to provide special
  209. definitions for this platform. The need for mach/io.h should
  210. be avoided when possible.
  211. config NEED_MACH_MEMORY_H
  212. bool
  213. help
  214. Select this when mach/memory.h is required to provide special
  215. definitions for this platform. The need for mach/memory.h should
  216. be avoided when possible.
  217. config PHYS_OFFSET
  218. hex "Physical address of main memory" if MMU
  219. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  220. default DRAM_BASE if !MMU
  221. help
  222. Please provide the physical address corresponding to the
  223. location of main memory in your system.
  224. config GENERIC_BUG
  225. def_bool y
  226. depends on BUG
  227. source "init/Kconfig"
  228. source "kernel/Kconfig.freezer"
  229. menu "System Type"
  230. config MMU
  231. bool "MMU-based Paged Memory Management Support"
  232. default y
  233. help
  234. Select if you want MMU-based virtualised addressing space
  235. support by paged memory management. If unsure, say 'Y'.
  236. #
  237. # The "ARM system type" choice list is ordered alphabetically by option
  238. # text. Please add new entries in the option alphabetic order.
  239. #
  240. choice
  241. prompt "ARM system type"
  242. default ARCH_VERSATILE if !MMU
  243. default ARCH_MULTIPLATFORM if MMU
  244. config ARCH_MULTIPLATFORM
  245. bool "Allow multiple platforms to be selected"
  246. depends on MMU
  247. select ARM_PATCH_PHYS_VIRT
  248. select AUTO_ZRELADDR
  249. select COMMON_CLK
  250. select MULTI_IRQ_HANDLER
  251. select SPARSE_IRQ
  252. select USE_OF
  253. config ARCH_INTEGRATOR
  254. bool "ARM Ltd. Integrator family"
  255. select ARCH_HAS_CPUFREQ
  256. select ARM_AMBA
  257. select COMMON_CLK
  258. select COMMON_CLK_VERSATILE
  259. select GENERIC_CLOCKEVENTS
  260. select HAVE_TCM
  261. select ICST
  262. select MULTI_IRQ_HANDLER
  263. select NEED_MACH_MEMORY_H
  264. select PLAT_VERSATILE
  265. select SPARSE_IRQ
  266. select VERSATILE_FPGA_IRQ
  267. help
  268. Support for ARM's Integrator platform.
  269. config ARCH_REALVIEW
  270. bool "ARM Ltd. RealView family"
  271. select ARCH_WANT_OPTIONAL_GPIOLIB
  272. select ARM_AMBA
  273. select ARM_TIMER_SP804
  274. select COMMON_CLK
  275. select COMMON_CLK_VERSATILE
  276. select GENERIC_CLOCKEVENTS
  277. select GPIO_PL061 if GPIOLIB
  278. select ICST
  279. select NEED_MACH_MEMORY_H
  280. select PLAT_VERSATILE
  281. select PLAT_VERSATILE_CLCD
  282. help
  283. This enables support for ARM Ltd RealView boards.
  284. config ARCH_VERSATILE
  285. bool "ARM Ltd. Versatile family"
  286. select ARCH_WANT_OPTIONAL_GPIOLIB
  287. select ARM_AMBA
  288. select ARM_TIMER_SP804
  289. select ARM_VIC
  290. select CLKDEV_LOOKUP
  291. select GENERIC_CLOCKEVENTS
  292. select HAVE_MACH_CLKDEV
  293. select ICST
  294. select PLAT_VERSATILE
  295. select PLAT_VERSATILE_CLCD
  296. select PLAT_VERSATILE_CLOCK
  297. select VERSATILE_FPGA_IRQ
  298. help
  299. This enables support for ARM Ltd Versatile board.
  300. config ARCH_AT91
  301. bool "Atmel AT91"
  302. select ARCH_REQUIRE_GPIOLIB
  303. select CLKDEV_LOOKUP
  304. select IRQ_DOMAIN
  305. select NEED_MACH_GPIO_H
  306. select NEED_MACH_IO_H if PCCARD
  307. select PINCTRL
  308. select PINCTRL_AT91 if USE_OF
  309. help
  310. This enables support for systems based on Atmel
  311. AT91RM9200 and AT91SAM9* processors.
  312. config ARCH_CLPS711X
  313. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  314. select ARCH_REQUIRE_GPIOLIB
  315. select AUTO_ZRELADDR
  316. select CLKSRC_MMIO
  317. select COMMON_CLK
  318. select CPU_ARM720T
  319. select GENERIC_CLOCKEVENTS
  320. select MFD_SYSCON
  321. select MULTI_IRQ_HANDLER
  322. select SPARSE_IRQ
  323. help
  324. Support for Cirrus Logic 711x/721x/731x based boards.
  325. config ARCH_GEMINI
  326. bool "Cortina Systems Gemini"
  327. select ARCH_REQUIRE_GPIOLIB
  328. select CLKSRC_MMIO
  329. select CPU_FA526
  330. select GENERIC_CLOCKEVENTS
  331. select NEED_MACH_GPIO_H
  332. help
  333. Support for the Cortina Systems Gemini family SoCs
  334. config ARCH_EBSA110
  335. bool "EBSA-110"
  336. select ARCH_USES_GETTIMEOFFSET
  337. select CPU_SA110
  338. select ISA
  339. select NEED_MACH_IO_H
  340. select NEED_MACH_MEMORY_H
  341. select NO_IOPORT
  342. help
  343. This is an evaluation board for the StrongARM processor available
  344. from Digital. It has limited hardware on-board, including an
  345. Ethernet interface, two PCMCIA sockets, two serial ports and a
  346. parallel port.
  347. config ARCH_EP93XX
  348. bool "EP93xx-based"
  349. select ARCH_HAS_HOLES_MEMORYMODEL
  350. select ARCH_REQUIRE_GPIOLIB
  351. select ARCH_USES_GETTIMEOFFSET
  352. select ARM_AMBA
  353. select ARM_VIC
  354. select CLKDEV_LOOKUP
  355. select CPU_ARM920T
  356. select NEED_MACH_MEMORY_H
  357. help
  358. This enables support for the Cirrus EP93xx series of CPUs.
  359. config ARCH_FOOTBRIDGE
  360. bool "FootBridge"
  361. select CPU_SA110
  362. select FOOTBRIDGE
  363. select GENERIC_CLOCKEVENTS
  364. select HAVE_IDE
  365. select NEED_MACH_IO_H if !MMU
  366. select NEED_MACH_MEMORY_H
  367. help
  368. Support for systems based on the DC21285 companion chip
  369. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  370. config ARCH_NETX
  371. bool "Hilscher NetX based"
  372. select ARM_VIC
  373. select CLKSRC_MMIO
  374. select CPU_ARM926T
  375. select GENERIC_CLOCKEVENTS
  376. help
  377. This enables support for systems based on the Hilscher NetX Soc
  378. config ARCH_IOP13XX
  379. bool "IOP13xx-based"
  380. depends on MMU
  381. select CPU_XSC3
  382. select NEED_MACH_MEMORY_H
  383. select NEED_RET_TO_USER
  384. select PCI
  385. select PLAT_IOP
  386. select VMSPLIT_1G
  387. help
  388. Support for Intel's IOP13XX (XScale) family of processors.
  389. config ARCH_IOP32X
  390. bool "IOP32x-based"
  391. depends on MMU
  392. select ARCH_REQUIRE_GPIOLIB
  393. select CPU_XSCALE
  394. select NEED_MACH_GPIO_H
  395. select NEED_RET_TO_USER
  396. select PCI
  397. select PLAT_IOP
  398. help
  399. Support for Intel's 80219 and IOP32X (XScale) family of
  400. processors.
  401. config ARCH_IOP33X
  402. bool "IOP33x-based"
  403. depends on MMU
  404. select ARCH_REQUIRE_GPIOLIB
  405. select CPU_XSCALE
  406. select NEED_MACH_GPIO_H
  407. select NEED_RET_TO_USER
  408. select PCI
  409. select PLAT_IOP
  410. help
  411. Support for Intel's IOP33X (XScale) family of processors.
  412. config ARCH_IXP4XX
  413. bool "IXP4xx-based"
  414. depends on MMU
  415. select ARCH_HAS_DMA_SET_COHERENT_MASK
  416. select ARCH_REQUIRE_GPIOLIB
  417. select CLKSRC_MMIO
  418. select CPU_XSCALE
  419. select DMABOUNCE if PCI
  420. select GENERIC_CLOCKEVENTS
  421. select MIGHT_HAVE_PCI
  422. select NEED_MACH_IO_H
  423. select USB_EHCI_BIG_ENDIAN_DESC
  424. select USB_EHCI_BIG_ENDIAN_MMIO
  425. help
  426. Support for Intel's IXP4XX (XScale) family of processors.
  427. config ARCH_DOVE
  428. bool "Marvell Dove"
  429. select ARCH_REQUIRE_GPIOLIB
  430. select CPU_PJ4
  431. select GENERIC_CLOCKEVENTS
  432. select MIGHT_HAVE_PCI
  433. select MVEBU_MBUS
  434. select PINCTRL
  435. select PINCTRL_DOVE
  436. select PLAT_ORION_LEGACY
  437. select USB_ARCH_HAS_EHCI
  438. help
  439. Support for the Marvell Dove SoC 88AP510
  440. config ARCH_KIRKWOOD
  441. bool "Marvell Kirkwood"
  442. select ARCH_HAS_CPUFREQ
  443. select ARCH_REQUIRE_GPIOLIB
  444. select CPU_FEROCEON
  445. select GENERIC_CLOCKEVENTS
  446. select MVEBU_MBUS
  447. select PCI
  448. select PCI_QUIRKS
  449. select PINCTRL
  450. select PINCTRL_KIRKWOOD
  451. select PLAT_ORION_LEGACY
  452. help
  453. Support for the following Marvell Kirkwood series SoCs:
  454. 88F6180, 88F6192 and 88F6281.
  455. config ARCH_MV78XX0
  456. bool "Marvell MV78xx0"
  457. select ARCH_REQUIRE_GPIOLIB
  458. select CPU_FEROCEON
  459. select GENERIC_CLOCKEVENTS
  460. select MVEBU_MBUS
  461. select PCI
  462. select PLAT_ORION_LEGACY
  463. help
  464. Support for the following Marvell MV78xx0 series SoCs:
  465. MV781x0, MV782x0.
  466. config ARCH_ORION5X
  467. bool "Marvell Orion"
  468. depends on MMU
  469. select ARCH_REQUIRE_GPIOLIB
  470. select CPU_FEROCEON
  471. select GENERIC_CLOCKEVENTS
  472. select MVEBU_MBUS
  473. select PCI
  474. select PLAT_ORION_LEGACY
  475. help
  476. Support for the following Marvell Orion 5x series SoCs:
  477. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  478. Orion-2 (5281), Orion-1-90 (6183).
  479. config ARCH_MMP
  480. bool "Marvell PXA168/910/MMP2"
  481. depends on MMU
  482. select ARCH_REQUIRE_GPIOLIB
  483. select CLKDEV_LOOKUP
  484. select GENERIC_ALLOCATOR
  485. select GENERIC_CLOCKEVENTS
  486. select GPIO_PXA
  487. select IRQ_DOMAIN
  488. select MULTI_IRQ_HANDLER
  489. select NEED_MACH_GPIO_H
  490. select PINCTRL
  491. select PLAT_PXA
  492. select SPARSE_IRQ
  493. help
  494. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  495. config ARCH_KS8695
  496. bool "Micrel/Kendin KS8695"
  497. select ARCH_REQUIRE_GPIOLIB
  498. select CLKSRC_MMIO
  499. select CPU_ARM922T
  500. select GENERIC_CLOCKEVENTS
  501. select NEED_MACH_MEMORY_H
  502. help
  503. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  504. System-on-Chip devices.
  505. config ARCH_W90X900
  506. bool "Nuvoton W90X900 CPU"
  507. select ARCH_REQUIRE_GPIOLIB
  508. select CLKDEV_LOOKUP
  509. select CLKSRC_MMIO
  510. select CPU_ARM926T
  511. select GENERIC_CLOCKEVENTS
  512. help
  513. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  514. At present, the w90x900 has been renamed nuc900, regarding
  515. the ARM series product line, you can login the following
  516. link address to know more.
  517. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  518. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  519. config ARCH_LPC32XX
  520. bool "NXP LPC32XX"
  521. select ARCH_REQUIRE_GPIOLIB
  522. select ARM_AMBA
  523. select CLKDEV_LOOKUP
  524. select CLKSRC_MMIO
  525. select CPU_ARM926T
  526. select GENERIC_CLOCKEVENTS
  527. select HAVE_IDE
  528. select HAVE_PWM
  529. select USB_ARCH_HAS_OHCI
  530. select USE_OF
  531. help
  532. Support for the NXP LPC32XX family of processors
  533. config ARCH_PXA
  534. bool "PXA2xx/PXA3xx-based"
  535. depends on MMU
  536. select ARCH_HAS_CPUFREQ
  537. select ARCH_MTD_XIP
  538. select ARCH_REQUIRE_GPIOLIB
  539. select ARM_CPU_SUSPEND if PM
  540. select AUTO_ZRELADDR
  541. select CLKDEV_LOOKUP
  542. select CLKSRC_MMIO
  543. select GENERIC_CLOCKEVENTS
  544. select GPIO_PXA
  545. select HAVE_IDE
  546. select MULTI_IRQ_HANDLER
  547. select NEED_MACH_GPIO_H
  548. select PLAT_PXA
  549. select SPARSE_IRQ
  550. help
  551. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  552. config ARCH_MSM
  553. bool "Qualcomm MSM"
  554. select ARCH_REQUIRE_GPIOLIB
  555. select CLKSRC_OF if OF
  556. select COMMON_CLK
  557. select GENERIC_CLOCKEVENTS
  558. help
  559. Support for Qualcomm MSM/QSD based systems. This runs on the
  560. apps processor of the MSM/QSD and depends on a shared memory
  561. interface to the modem processor which runs the baseband
  562. stack and controls some vital subsystems
  563. (clock and power control, etc).
  564. config ARCH_SHMOBILE
  565. bool "Renesas SH-Mobile / R-Mobile"
  566. select ARM_PATCH_PHYS_VIRT
  567. select CLKDEV_LOOKUP
  568. select GENERIC_CLOCKEVENTS
  569. select HAVE_ARM_SCU if SMP
  570. select HAVE_ARM_TWD if SMP
  571. select HAVE_MACH_CLKDEV
  572. select HAVE_SMP
  573. select MIGHT_HAVE_CACHE_L2X0
  574. select MULTI_IRQ_HANDLER
  575. select NO_IOPORT
  576. select PINCTRL
  577. select PM_GENERIC_DOMAINS if PM
  578. select SPARSE_IRQ
  579. help
  580. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  581. config ARCH_RPC
  582. bool "RiscPC"
  583. select ARCH_ACORN
  584. select ARCH_MAY_HAVE_PC_FDC
  585. select ARCH_SPARSEMEM_ENABLE
  586. select ARCH_USES_GETTIMEOFFSET
  587. select FIQ
  588. select HAVE_IDE
  589. select HAVE_PATA_PLATFORM
  590. select ISA_DMA_API
  591. select NEED_MACH_IO_H
  592. select NEED_MACH_MEMORY_H
  593. select NO_IOPORT
  594. select VIRT_TO_BUS
  595. help
  596. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  597. CD-ROM interface, serial and parallel port, and the floppy drive.
  598. config ARCH_SA1100
  599. bool "SA1100-based"
  600. select ARCH_HAS_CPUFREQ
  601. select ARCH_MTD_XIP
  602. select ARCH_REQUIRE_GPIOLIB
  603. select ARCH_SPARSEMEM_ENABLE
  604. select CLKDEV_LOOKUP
  605. select CLKSRC_MMIO
  606. select CPU_FREQ
  607. select CPU_SA1100
  608. select GENERIC_CLOCKEVENTS
  609. select HAVE_IDE
  610. select ISA
  611. select NEED_MACH_GPIO_H
  612. select NEED_MACH_MEMORY_H
  613. select SPARSE_IRQ
  614. help
  615. Support for StrongARM 11x0 based boards.
  616. config ARCH_S3C24XX
  617. bool "Samsung S3C24XX SoCs"
  618. select ARCH_HAS_CPUFREQ
  619. select ARCH_REQUIRE_GPIOLIB
  620. select CLKDEV_LOOKUP
  621. select CLKSRC_SAMSUNG_PWM
  622. select GENERIC_CLOCKEVENTS
  623. select GPIO_SAMSUNG
  624. select HAVE_S3C2410_I2C if I2C
  625. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  626. select HAVE_S3C_RTC if RTC_CLASS
  627. select MULTI_IRQ_HANDLER
  628. select NEED_MACH_GPIO_H
  629. select NEED_MACH_IO_H
  630. select SAMSUNG_ATAGS
  631. help
  632. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  633. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  634. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  635. Samsung SMDK2410 development board (and derivatives).
  636. config ARCH_S3C64XX
  637. bool "Samsung S3C64XX"
  638. select ARCH_HAS_CPUFREQ
  639. select ARCH_REQUIRE_GPIOLIB
  640. select ARM_VIC
  641. select CLKDEV_LOOKUP
  642. select CLKSRC_SAMSUNG_PWM
  643. select CPU_V6
  644. select GENERIC_CLOCKEVENTS
  645. select GPIO_SAMSUNG
  646. select HAVE_S3C2410_I2C if I2C
  647. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  648. select HAVE_TCM
  649. select NEED_MACH_GPIO_H
  650. select NO_IOPORT
  651. select PLAT_SAMSUNG
  652. select PM_GENERIC_DOMAINS
  653. select S3C_DEV_NAND
  654. select S3C_GPIO_TRACK
  655. select SAMSUNG_ATAGS
  656. select SAMSUNG_CLKSRC
  657. select SAMSUNG_GPIOLIB_4BIT
  658. select SAMSUNG_WAKEMASK
  659. select SAMSUNG_WDT_RESET
  660. select USB_ARCH_HAS_OHCI
  661. help
  662. Samsung S3C64XX series based systems
  663. config ARCH_S5P64X0
  664. bool "Samsung S5P6440 S5P6450"
  665. select CLKDEV_LOOKUP
  666. select CLKSRC_SAMSUNG_PWM
  667. select CPU_V6
  668. select GENERIC_CLOCKEVENTS
  669. select GPIO_SAMSUNG
  670. select HAVE_S3C2410_I2C if I2C
  671. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  672. select HAVE_S3C_RTC if RTC_CLASS
  673. select NEED_MACH_GPIO_H
  674. select SAMSUNG_ATAGS
  675. select SAMSUNG_WDT_RESET
  676. help
  677. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  678. SMDK6450.
  679. config ARCH_S5PC100
  680. bool "Samsung S5PC100"
  681. select ARCH_REQUIRE_GPIOLIB
  682. select CLKDEV_LOOKUP
  683. select CLKSRC_SAMSUNG_PWM
  684. select CPU_V7
  685. select GENERIC_CLOCKEVENTS
  686. select GPIO_SAMSUNG
  687. select HAVE_S3C2410_I2C if I2C
  688. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  689. select HAVE_S3C_RTC if RTC_CLASS
  690. select NEED_MACH_GPIO_H
  691. select SAMSUNG_ATAGS
  692. select SAMSUNG_WDT_RESET
  693. help
  694. Samsung S5PC100 series based systems
  695. config ARCH_S5PV210
  696. bool "Samsung S5PV210/S5PC110"
  697. select ARCH_HAS_CPUFREQ
  698. select ARCH_HAS_HOLES_MEMORYMODEL
  699. select ARCH_SPARSEMEM_ENABLE
  700. select CLKDEV_LOOKUP
  701. select CLKSRC_SAMSUNG_PWM
  702. select CPU_V7
  703. select GENERIC_CLOCKEVENTS
  704. select GPIO_SAMSUNG
  705. select HAVE_S3C2410_I2C if I2C
  706. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  707. select HAVE_S3C_RTC if RTC_CLASS
  708. select NEED_MACH_GPIO_H
  709. select NEED_MACH_MEMORY_H
  710. select SAMSUNG_ATAGS
  711. help
  712. Samsung S5PV210/S5PC110 series based systems
  713. config ARCH_EXYNOS
  714. bool "Samsung EXYNOS"
  715. select ARCH_HAS_CPUFREQ
  716. select ARCH_HAS_HOLES_MEMORYMODEL
  717. select ARCH_REQUIRE_GPIOLIB
  718. select ARCH_SPARSEMEM_ENABLE
  719. select ARM_GIC
  720. select COMMON_CLK
  721. select CPU_V7
  722. select GENERIC_CLOCKEVENTS
  723. select HAVE_S3C2410_I2C if I2C
  724. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  725. select HAVE_S3C_RTC if RTC_CLASS
  726. select NEED_MACH_MEMORY_H
  727. select SPARSE_IRQ
  728. select USE_OF
  729. help
  730. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  731. config ARCH_DAVINCI
  732. bool "TI DaVinci"
  733. select ARCH_HAS_HOLES_MEMORYMODEL
  734. select ARCH_REQUIRE_GPIOLIB
  735. select CLKDEV_LOOKUP
  736. select GENERIC_ALLOCATOR
  737. select GENERIC_CLOCKEVENTS
  738. select GENERIC_IRQ_CHIP
  739. select HAVE_IDE
  740. select NEED_MACH_GPIO_H
  741. select TI_PRIV_EDMA
  742. select USE_OF
  743. select ZONE_DMA
  744. help
  745. Support for TI's DaVinci platform.
  746. config ARCH_OMAP1
  747. bool "TI OMAP1"
  748. depends on MMU
  749. select ARCH_HAS_CPUFREQ
  750. select ARCH_HAS_HOLES_MEMORYMODEL
  751. select ARCH_OMAP
  752. select ARCH_REQUIRE_GPIOLIB
  753. select CLKDEV_LOOKUP
  754. select CLKSRC_MMIO
  755. select GENERIC_CLOCKEVENTS
  756. select GENERIC_IRQ_CHIP
  757. select HAVE_IDE
  758. select IRQ_DOMAIN
  759. select NEED_MACH_IO_H if PCCARD
  760. select NEED_MACH_MEMORY_H
  761. help
  762. Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
  763. endchoice
  764. menu "Multiple platform selection"
  765. depends on ARCH_MULTIPLATFORM
  766. comment "CPU Core family selection"
  767. config ARCH_MULTI_V4T
  768. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  769. depends on !ARCH_MULTI_V6_V7
  770. select ARCH_MULTI_V4_V5
  771. select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
  772. CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
  773. CPU_ARM925T || CPU_ARM940T)
  774. config ARCH_MULTI_V5
  775. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  776. depends on !ARCH_MULTI_V6_V7
  777. select ARCH_MULTI_V4_V5
  778. select CPU_ARM926T if (!CPU_ARM946E || CPU_ARM1020 || \
  779. CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
  780. CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
  781. config ARCH_MULTI_V4_V5
  782. bool
  783. config ARCH_MULTI_V6
  784. bool "ARMv6 based platforms (ARM11)"
  785. select ARCH_MULTI_V6_V7
  786. select CPU_V6
  787. config ARCH_MULTI_V7
  788. bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
  789. default y
  790. select ARCH_MULTI_V6_V7
  791. select CPU_V7
  792. config ARCH_MULTI_V6_V7
  793. bool
  794. config ARCH_MULTI_CPU_AUTO
  795. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  796. select ARCH_MULTI_V5
  797. endmenu
  798. #
  799. # This is sorted alphabetically by mach-* pathname. However, plat-*
  800. # Kconfigs may be included either alphabetically (according to the
  801. # plat- suffix) or along side the corresponding mach-* source.
  802. #
  803. source "arch/arm/mach-mvebu/Kconfig"
  804. source "arch/arm/mach-at91/Kconfig"
  805. source "arch/arm/mach-bcm/Kconfig"
  806. source "arch/arm/mach-bcm2835/Kconfig"
  807. source "arch/arm/mach-clps711x/Kconfig"
  808. source "arch/arm/mach-cns3xxx/Kconfig"
  809. source "arch/arm/mach-davinci/Kconfig"
  810. source "arch/arm/mach-dove/Kconfig"
  811. source "arch/arm/mach-ep93xx/Kconfig"
  812. source "arch/arm/mach-footbridge/Kconfig"
  813. source "arch/arm/mach-gemini/Kconfig"
  814. source "arch/arm/mach-highbank/Kconfig"
  815. source "arch/arm/mach-integrator/Kconfig"
  816. source "arch/arm/mach-iop32x/Kconfig"
  817. source "arch/arm/mach-iop33x/Kconfig"
  818. source "arch/arm/mach-iop13xx/Kconfig"
  819. source "arch/arm/mach-ixp4xx/Kconfig"
  820. source "arch/arm/mach-keystone/Kconfig"
  821. source "arch/arm/mach-kirkwood/Kconfig"
  822. source "arch/arm/mach-ks8695/Kconfig"
  823. source "arch/arm/mach-msm/Kconfig"
  824. source "arch/arm/mach-mv78xx0/Kconfig"
  825. source "arch/arm/mach-imx/Kconfig"
  826. source "arch/arm/mach-mxs/Kconfig"
  827. source "arch/arm/mach-netx/Kconfig"
  828. source "arch/arm/mach-nomadik/Kconfig"
  829. source "arch/arm/mach-nspire/Kconfig"
  830. source "arch/arm/plat-omap/Kconfig"
  831. source "arch/arm/mach-omap1/Kconfig"
  832. source "arch/arm/mach-omap2/Kconfig"
  833. source "arch/arm/mach-orion5x/Kconfig"
  834. source "arch/arm/mach-picoxcell/Kconfig"
  835. source "arch/arm/mach-pxa/Kconfig"
  836. source "arch/arm/plat-pxa/Kconfig"
  837. source "arch/arm/mach-mmp/Kconfig"
  838. source "arch/arm/mach-realview/Kconfig"
  839. source "arch/arm/mach-rockchip/Kconfig"
  840. source "arch/arm/mach-sa1100/Kconfig"
  841. source "arch/arm/plat-samsung/Kconfig"
  842. source "arch/arm/mach-socfpga/Kconfig"
  843. source "arch/arm/mach-spear/Kconfig"
  844. source "arch/arm/mach-sti/Kconfig"
  845. source "arch/arm/mach-s3c24xx/Kconfig"
  846. source "arch/arm/mach-s3c64xx/Kconfig"
  847. source "arch/arm/mach-s5p64x0/Kconfig"
  848. source "arch/arm/mach-s5pc100/Kconfig"
  849. source "arch/arm/mach-s5pv210/Kconfig"
  850. source "arch/arm/mach-exynos/Kconfig"
  851. source "arch/arm/mach-shmobile/Kconfig"
  852. source "arch/arm/mach-sunxi/Kconfig"
  853. source "arch/arm/mach-prima2/Kconfig"
  854. source "arch/arm/mach-tegra/Kconfig"
  855. source "arch/arm/mach-u300/Kconfig"
  856. source "arch/arm/mach-ux500/Kconfig"
  857. source "arch/arm/mach-versatile/Kconfig"
  858. source "arch/arm/mach-vexpress/Kconfig"
  859. source "arch/arm/plat-versatile/Kconfig"
  860. source "arch/arm/mach-virt/Kconfig"
  861. source "arch/arm/mach-vt8500/Kconfig"
  862. source "arch/arm/mach-w90x900/Kconfig"
  863. source "arch/arm/mach-zynq/Kconfig"
  864. # Definitions to make life easier
  865. config ARCH_ACORN
  866. bool
  867. config PLAT_IOP
  868. bool
  869. select GENERIC_CLOCKEVENTS
  870. config PLAT_ORION
  871. bool
  872. select CLKSRC_MMIO
  873. select COMMON_CLK
  874. select GENERIC_IRQ_CHIP
  875. select IRQ_DOMAIN
  876. config PLAT_ORION_LEGACY
  877. bool
  878. select PLAT_ORION
  879. config PLAT_PXA
  880. bool
  881. config PLAT_VERSATILE
  882. bool
  883. config ARM_TIMER_SP804
  884. bool
  885. select CLKSRC_MMIO
  886. select CLKSRC_OF if OF
  887. source arch/arm/mm/Kconfig
  888. config ARM_NR_BANKS
  889. int
  890. default 16 if ARCH_EP93XX
  891. default 8
  892. config IWMMXT
  893. bool "Enable iWMMXt support" if !CPU_PJ4
  894. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  895. default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4
  896. help
  897. Enable support for iWMMXt context switching at run time if
  898. running on a CPU that supports it.
  899. config XSCALE_PMU
  900. bool
  901. depends on CPU_XSCALE
  902. default y
  903. config MULTI_IRQ_HANDLER
  904. bool
  905. help
  906. Allow each machine to specify it's own IRQ handler at run time.
  907. if !MMU
  908. source "arch/arm/Kconfig-nommu"
  909. endif
  910. config PJ4B_ERRATA_4742
  911. bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
  912. depends on CPU_PJ4B && MACH_ARMADA_370
  913. default y
  914. help
  915. When coming out of either a Wait for Interrupt (WFI) or a Wait for
  916. Event (WFE) IDLE states, a specific timing sensitivity exists between
  917. the retiring WFI/WFE instructions and the newly issued subsequent
  918. instructions. This sensitivity can result in a CPU hang scenario.
  919. Workaround:
  920. The software must insert either a Data Synchronization Barrier (DSB)
  921. or Data Memory Barrier (DMB) command immediately after the WFI/WFE
  922. instruction
  923. config ARM_ERRATA_326103
  924. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  925. depends on CPU_V6
  926. help
  927. Executing a SWP instruction to read-only memory does not set bit 11
  928. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  929. treat the access as a read, preventing a COW from occurring and
  930. causing the faulting task to livelock.
  931. config ARM_ERRATA_411920
  932. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  933. depends on CPU_V6 || CPU_V6K
  934. help
  935. Invalidation of the Instruction Cache operation can
  936. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  937. It does not affect the MPCore. This option enables the ARM Ltd.
  938. recommended workaround.
  939. config ARM_ERRATA_430973
  940. bool "ARM errata: Stale prediction on replaced interworking branch"
  941. depends on CPU_V7
  942. help
  943. This option enables the workaround for the 430973 Cortex-A8
  944. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  945. interworking branch is replaced with another code sequence at the
  946. same virtual address, whether due to self-modifying code or virtual
  947. to physical address re-mapping, Cortex-A8 does not recover from the
  948. stale interworking branch prediction. This results in Cortex-A8
  949. executing the new code sequence in the incorrect ARM or Thumb state.
  950. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  951. and also flushes the branch target cache at every context switch.
  952. Note that setting specific bits in the ACTLR register may not be
  953. available in non-secure mode.
  954. config ARM_ERRATA_458693
  955. bool "ARM errata: Processor deadlock when a false hazard is created"
  956. depends on CPU_V7
  957. depends on !ARCH_MULTIPLATFORM
  958. help
  959. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  960. erratum. For very specific sequences of memory operations, it is
  961. possible for a hazard condition intended for a cache line to instead
  962. be incorrectly associated with a different cache line. This false
  963. hazard might then cause a processor deadlock. The workaround enables
  964. the L1 caching of the NEON accesses and disables the PLD instruction
  965. in the ACTLR register. Note that setting specific bits in the ACTLR
  966. register may not be available in non-secure mode.
  967. config ARM_ERRATA_460075
  968. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  969. depends on CPU_V7
  970. depends on !ARCH_MULTIPLATFORM
  971. help
  972. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  973. erratum. Any asynchronous access to the L2 cache may encounter a
  974. situation in which recent store transactions to the L2 cache are lost
  975. and overwritten with stale memory contents from external memory. The
  976. workaround disables the write-allocate mode for the L2 cache via the
  977. ACTLR register. Note that setting specific bits in the ACTLR register
  978. may not be available in non-secure mode.
  979. config ARM_ERRATA_742230
  980. bool "ARM errata: DMB operation may be faulty"
  981. depends on CPU_V7 && SMP
  982. depends on !ARCH_MULTIPLATFORM
  983. help
  984. This option enables the workaround for the 742230 Cortex-A9
  985. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  986. between two write operations may not ensure the correct visibility
  987. ordering of the two writes. This workaround sets a specific bit in
  988. the diagnostic register of the Cortex-A9 which causes the DMB
  989. instruction to behave as a DSB, ensuring the correct behaviour of
  990. the two writes.
  991. config ARM_ERRATA_742231
  992. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  993. depends on CPU_V7 && SMP
  994. depends on !ARCH_MULTIPLATFORM
  995. help
  996. This option enables the workaround for the 742231 Cortex-A9
  997. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  998. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  999. accessing some data located in the same cache line, may get corrupted
  1000. data due to bad handling of the address hazard when the line gets
  1001. replaced from one of the CPUs at the same time as another CPU is
  1002. accessing it. This workaround sets specific bits in the diagnostic
  1003. register of the Cortex-A9 which reduces the linefill issuing
  1004. capabilities of the processor.
  1005. config PL310_ERRATA_588369
  1006. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1007. depends on CACHE_L2X0
  1008. help
  1009. The PL310 L2 cache controller implements three types of Clean &
  1010. Invalidate maintenance operations: by Physical Address
  1011. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1012. They are architecturally defined to behave as the execution of a
  1013. clean operation followed immediately by an invalidate operation,
  1014. both performing to the same memory location. This functionality
  1015. is not correctly implemented in PL310 as clean lines are not
  1016. invalidated as a result of these operations.
  1017. config ARM_ERRATA_643719
  1018. bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
  1019. depends on CPU_V7 && SMP
  1020. help
  1021. This option enables the workaround for the 643719 Cortex-A9 (prior to
  1022. r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
  1023. register returns zero when it should return one. The workaround
  1024. corrects this value, ensuring cache maintenance operations which use
  1025. it behave as intended and avoiding data corruption.
  1026. config ARM_ERRATA_720789
  1027. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1028. depends on CPU_V7
  1029. help
  1030. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1031. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1032. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1033. As a consequence of this erratum, some TLB entries which should be
  1034. invalidated are not, resulting in an incoherency in the system page
  1035. tables. The workaround changes the TLB flushing routines to invalidate
  1036. entries regardless of the ASID.
  1037. config PL310_ERRATA_727915
  1038. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1039. depends on CACHE_L2X0
  1040. help
  1041. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1042. operation (offset 0x7FC). This operation runs in background so that
  1043. PL310 can handle normal accesses while it is in progress. Under very
  1044. rare circumstances, due to this erratum, write data can be lost when
  1045. PL310 treats a cacheable write transaction during a Clean &
  1046. Invalidate by Way operation.
  1047. config ARM_ERRATA_743622
  1048. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1049. depends on CPU_V7
  1050. depends on !ARCH_MULTIPLATFORM
  1051. help
  1052. This option enables the workaround for the 743622 Cortex-A9
  1053. (r2p*) erratum. Under very rare conditions, a faulty
  1054. optimisation in the Cortex-A9 Store Buffer may lead to data
  1055. corruption. This workaround sets a specific bit in the diagnostic
  1056. register of the Cortex-A9 which disables the Store Buffer
  1057. optimisation, preventing the defect from occurring. This has no
  1058. visible impact on the overall performance or power consumption of the
  1059. processor.
  1060. config ARM_ERRATA_751472
  1061. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1062. depends on CPU_V7
  1063. depends on !ARCH_MULTIPLATFORM
  1064. help
  1065. This option enables the workaround for the 751472 Cortex-A9 (prior
  1066. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1067. completion of a following broadcasted operation if the second
  1068. operation is received by a CPU before the ICIALLUIS has completed,
  1069. potentially leading to corrupted entries in the cache or TLB.
  1070. config PL310_ERRATA_753970
  1071. bool "PL310 errata: cache sync operation may be faulty"
  1072. depends on CACHE_PL310
  1073. help
  1074. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1075. Under some condition the effect of cache sync operation on
  1076. the store buffer still remains when the operation completes.
  1077. This means that the store buffer is always asked to drain and
  1078. this prevents it from merging any further writes. The workaround
  1079. is to replace the normal offset of cache sync operation (0x730)
  1080. by another offset targeting an unmapped PL310 register 0x740.
  1081. This has the same effect as the cache sync operation: store buffer
  1082. drain and waiting for all buffers empty.
  1083. config ARM_ERRATA_754322
  1084. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1085. depends on CPU_V7
  1086. help
  1087. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1088. r3p*) erratum. A speculative memory access may cause a page table walk
  1089. which starts prior to an ASID switch but completes afterwards. This
  1090. can populate the micro-TLB with a stale entry which may be hit with
  1091. the new ASID. This workaround places two dsb instructions in the mm
  1092. switching code so that no page table walks can cross the ASID switch.
  1093. config ARM_ERRATA_754327
  1094. bool "ARM errata: no automatic Store Buffer drain"
  1095. depends on CPU_V7 && SMP
  1096. help
  1097. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1098. r2p0) erratum. The Store Buffer does not have any automatic draining
  1099. mechanism and therefore a livelock may occur if an external agent
  1100. continuously polls a memory location waiting to observe an update.
  1101. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1102. written polling loops from denying visibility of updates to memory.
  1103. config ARM_ERRATA_364296
  1104. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1105. depends on CPU_V6
  1106. help
  1107. This options enables the workaround for the 364296 ARM1136
  1108. r0p2 erratum (possible cache data corruption with
  1109. hit-under-miss enabled). It sets the undocumented bit 31 in
  1110. the auxiliary control register and the FI bit in the control
  1111. register, thus disabling hit-under-miss without putting the
  1112. processor into full low interrupt latency mode. ARM11MPCore
  1113. is not affected.
  1114. config ARM_ERRATA_764369
  1115. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1116. depends on CPU_V7 && SMP
  1117. help
  1118. This option enables the workaround for erratum 764369
  1119. affecting Cortex-A9 MPCore with two or more processors (all
  1120. current revisions). Under certain timing circumstances, a data
  1121. cache line maintenance operation by MVA targeting an Inner
  1122. Shareable memory region may fail to proceed up to either the
  1123. Point of Coherency or to the Point of Unification of the
  1124. system. This workaround adds a DSB instruction before the
  1125. relevant cache maintenance functions and sets a specific bit
  1126. in the diagnostic control register of the SCU.
  1127. config PL310_ERRATA_769419
  1128. bool "PL310 errata: no automatic Store Buffer drain"
  1129. depends on CACHE_L2X0
  1130. help
  1131. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1132. not automatically drain. This can cause normal, non-cacheable
  1133. writes to be retained when the memory system is idle, leading
  1134. to suboptimal I/O performance for drivers using coherent DMA.
  1135. This option adds a write barrier to the cpu_idle loop so that,
  1136. on systems with an outer cache, the store buffer is drained
  1137. explicitly.
  1138. config ARM_ERRATA_775420
  1139. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1140. depends on CPU_V7
  1141. help
  1142. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1143. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1144. operation aborts with MMU exception, it might cause the processor
  1145. to deadlock. This workaround puts DSB before executing ISB if
  1146. an abort may occur on cache maintenance.
  1147. config ARM_ERRATA_798181
  1148. bool "ARM errata: TLBI/DSB failure on Cortex-A15"
  1149. depends on CPU_V7 && SMP
  1150. help
  1151. On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
  1152. adequately shooting down all use of the old entries. This
  1153. option enables the Linux kernel workaround for this erratum
  1154. which sends an IPI to the CPUs that are running the same ASID
  1155. as the one being invalidated.
  1156. config ARM_ERRATA_773022
  1157. bool "ARM errata: incorrect instructions may be executed from loop buffer"
  1158. depends on CPU_V7
  1159. help
  1160. This option enables the workaround for the 773022 Cortex-A15
  1161. (up to r0p4) erratum. In certain rare sequences of code, the
  1162. loop buffer may deliver incorrect instructions. This
  1163. workaround disables the loop buffer to avoid the erratum.
  1164. endmenu
  1165. source "arch/arm/common/Kconfig"
  1166. menu "Bus support"
  1167. config ARM_AMBA
  1168. bool
  1169. config ISA
  1170. bool
  1171. help
  1172. Find out whether you have ISA slots on your motherboard. ISA is the
  1173. name of a bus system, i.e. the way the CPU talks to the other stuff
  1174. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1175. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1176. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1177. # Select ISA DMA controller support
  1178. config ISA_DMA
  1179. bool
  1180. select ISA_DMA_API
  1181. # Select ISA DMA interface
  1182. config ISA_DMA_API
  1183. bool
  1184. config PCI
  1185. bool "PCI support" if MIGHT_HAVE_PCI
  1186. help
  1187. Find out whether you have a PCI motherboard. PCI is the name of a
  1188. bus system, i.e. the way the CPU talks to the other stuff inside
  1189. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1190. VESA. If you have PCI, say Y, otherwise N.
  1191. config PCI_DOMAINS
  1192. bool
  1193. depends on PCI
  1194. config PCI_NANOENGINE
  1195. bool "BSE nanoEngine PCI support"
  1196. depends on SA1100_NANOENGINE
  1197. help
  1198. Enable PCI on the BSE nanoEngine board.
  1199. config PCI_SYSCALL
  1200. def_bool PCI
  1201. config PCI_HOST_ITE8152
  1202. bool
  1203. depends on PCI && MACH_ARMCORE
  1204. default y
  1205. select DMABOUNCE
  1206. source "drivers/pci/Kconfig"
  1207. source "drivers/pci/pcie/Kconfig"
  1208. source "drivers/pcmcia/Kconfig"
  1209. endmenu
  1210. menu "Kernel Features"
  1211. config HAVE_SMP
  1212. bool
  1213. help
  1214. This option should be selected by machines which have an SMP-
  1215. capable CPU.
  1216. The only effect of this option is to make the SMP-related
  1217. options available to the user for configuration.
  1218. config SMP
  1219. bool "Symmetric Multi-Processing"
  1220. depends on CPU_V6K || CPU_V7
  1221. depends on GENERIC_CLOCKEVENTS
  1222. depends on HAVE_SMP
  1223. depends on MMU || ARM_MPU
  1224. select USE_GENERIC_SMP_HELPERS
  1225. help
  1226. This enables support for systems with more than one CPU. If you have
  1227. a system with only one CPU, like most personal computers, say N. If
  1228. you have a system with more than one CPU, say Y.
  1229. If you say N here, the kernel will run on single and multiprocessor
  1230. machines, but will use only one CPU of a multiprocessor machine. If
  1231. you say Y here, the kernel will run on many, but not all, single
  1232. processor machines. On a single processor machine, the kernel will
  1233. run faster if you say N here.
  1234. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1235. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1236. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1237. If you don't know what to do here, say N.
  1238. config SMP_ON_UP
  1239. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1240. depends on SMP && !XIP_KERNEL && MMU
  1241. default y
  1242. help
  1243. SMP kernels contain instructions which fail on non-SMP processors.
  1244. Enabling this option allows the kernel to modify itself to make
  1245. these instructions safe. Disabling it allows about 1K of space
  1246. savings.
  1247. If you don't know what to do here, say Y.
  1248. config ARM_CPU_TOPOLOGY
  1249. bool "Support cpu topology definition"
  1250. depends on SMP && CPU_V7
  1251. default y
  1252. help
  1253. Support ARM cpu topology definition. The MPIDR register defines
  1254. affinity between processors which is then used to describe the cpu
  1255. topology of an ARM System.
  1256. config SCHED_MC
  1257. bool "Multi-core scheduler support"
  1258. depends on ARM_CPU_TOPOLOGY
  1259. help
  1260. Multi-core scheduler support improves the CPU scheduler's decision
  1261. making when dealing with multi-core CPU chips at a cost of slightly
  1262. increased overhead in some places. If unsure say N here.
  1263. config SCHED_SMT
  1264. bool "SMT scheduler support"
  1265. depends on ARM_CPU_TOPOLOGY
  1266. help
  1267. Improves the CPU scheduler's decision making when dealing with
  1268. MultiThreading at a cost of slightly increased overhead in some
  1269. places. If unsure say N here.
  1270. config HAVE_ARM_SCU
  1271. bool
  1272. help
  1273. This option enables support for the ARM system coherency unit
  1274. config HAVE_ARM_ARCH_TIMER
  1275. bool "Architected timer support"
  1276. depends on CPU_V7
  1277. select ARM_ARCH_TIMER
  1278. help
  1279. This option enables support for the ARM architected timer
  1280. config HAVE_ARM_TWD
  1281. bool
  1282. depends on SMP
  1283. select CLKSRC_OF if OF
  1284. help
  1285. This options enables support for the ARM timer and watchdog unit
  1286. config MCPM
  1287. bool "Multi-Cluster Power Management"
  1288. depends on CPU_V7 && SMP
  1289. help
  1290. This option provides the common power management infrastructure
  1291. for (multi-)cluster based systems, such as big.LITTLE based
  1292. systems.
  1293. choice
  1294. prompt "Memory split"
  1295. default VMSPLIT_3G
  1296. help
  1297. Select the desired split between kernel and user memory.
  1298. If you are not absolutely sure what you are doing, leave this
  1299. option alone!
  1300. config VMSPLIT_3G
  1301. bool "3G/1G user/kernel split"
  1302. config VMSPLIT_2G
  1303. bool "2G/2G user/kernel split"
  1304. config VMSPLIT_1G
  1305. bool "1G/3G user/kernel split"
  1306. endchoice
  1307. config PAGE_OFFSET
  1308. hex
  1309. default 0x40000000 if VMSPLIT_1G
  1310. default 0x80000000 if VMSPLIT_2G
  1311. default 0xC0000000
  1312. config NR_CPUS
  1313. int "Maximum number of CPUs (2-32)"
  1314. range 2 32
  1315. depends on SMP
  1316. default "4"
  1317. config HOTPLUG_CPU
  1318. bool "Support for hot-pluggable CPUs"
  1319. depends on SMP
  1320. help
  1321. Say Y here to experiment with turning CPUs off and on. CPUs
  1322. can be controlled through /sys/devices/system/cpu.
  1323. config ARM_PSCI
  1324. bool "Support for the ARM Power State Coordination Interface (PSCI)"
  1325. depends on CPU_V7
  1326. help
  1327. Say Y here if you want Linux to communicate with system firmware
  1328. implementing the PSCI specification for CPU-centric power
  1329. management operations described in ARM document number ARM DEN
  1330. 0022A ("Power State Coordination Interface System Software on
  1331. ARM processors").
  1332. # The GPIO number here must be sorted by descending number. In case of
  1333. # a multiplatform kernel, we just want the highest value required by the
  1334. # selected platforms.
  1335. config ARCH_NR_GPIO
  1336. int
  1337. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1338. default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || SOC_DRA7XX
  1339. default 392 if ARCH_U8500
  1340. default 352 if ARCH_VT8500
  1341. default 288 if ARCH_SUNXI
  1342. default 264 if MACH_H4700
  1343. default 0
  1344. help
  1345. Maximum number of GPIOs in the system.
  1346. If unsure, leave the default value.
  1347. source kernel/Kconfig.preempt
  1348. config HZ_FIXED
  1349. int
  1350. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1351. ARCH_S5PV210 || ARCH_EXYNOS4
  1352. default AT91_TIMER_HZ if ARCH_AT91
  1353. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1354. default 0
  1355. choice
  1356. depends on HZ_FIXED = 0
  1357. prompt "Timer frequency"
  1358. config HZ_100
  1359. bool "100 Hz"
  1360. config HZ_200
  1361. bool "200 Hz"
  1362. config HZ_250
  1363. bool "250 Hz"
  1364. config HZ_300
  1365. bool "300 Hz"
  1366. config HZ_500
  1367. bool "500 Hz"
  1368. config HZ_1000
  1369. bool "1000 Hz"
  1370. endchoice
  1371. config HZ
  1372. int
  1373. default HZ_FIXED if HZ_FIXED != 0
  1374. default 100 if HZ_100
  1375. default 200 if HZ_200
  1376. default 250 if HZ_250
  1377. default 300 if HZ_300
  1378. default 500 if HZ_500
  1379. default 1000
  1380. config SCHED_HRTICK
  1381. def_bool HIGH_RES_TIMERS
  1382. config SCHED_HRTICK
  1383. def_bool HIGH_RES_TIMERS
  1384. config THUMB2_KERNEL
  1385. bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
  1386. depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
  1387. default y if CPU_THUMBONLY
  1388. select AEABI
  1389. select ARM_ASM_UNIFIED
  1390. select ARM_UNWIND
  1391. help
  1392. By enabling this option, the kernel will be compiled in
  1393. Thumb-2 mode. A compiler/assembler that understand the unified
  1394. ARM-Thumb syntax is needed.
  1395. If unsure, say N.
  1396. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1397. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1398. depends on THUMB2_KERNEL && MODULES
  1399. default y
  1400. help
  1401. Various binutils versions can resolve Thumb-2 branches to
  1402. locally-defined, preemptible global symbols as short-range "b.n"
  1403. branch instructions.
  1404. This is a problem, because there's no guarantee the final
  1405. destination of the symbol, or any candidate locations for a
  1406. trampoline, are within range of the branch. For this reason, the
  1407. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1408. relocation in modules at all, and it makes little sense to add
  1409. support.
  1410. The symptom is that the kernel fails with an "unsupported
  1411. relocation" error when loading some modules.
  1412. Until fixed tools are available, passing
  1413. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1414. code which hits this problem, at the cost of a bit of extra runtime
  1415. stack usage in some cases.
  1416. The problem is described in more detail at:
  1417. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1418. Only Thumb-2 kernels are affected.
  1419. Unless you are sure your tools don't have this problem, say Y.
  1420. config ARM_ASM_UNIFIED
  1421. bool
  1422. config AEABI
  1423. bool "Use the ARM EABI to compile the kernel"
  1424. help
  1425. This option allows for the kernel to be compiled using the latest
  1426. ARM ABI (aka EABI). This is only useful if you are using a user
  1427. space environment that is also compiled with EABI.
  1428. Since there are major incompatibilities between the legacy ABI and
  1429. EABI, especially with regard to structure member alignment, this
  1430. option also changes the kernel syscall calling convention to
  1431. disambiguate both ABIs and allow for backward compatibility support
  1432. (selected with CONFIG_OABI_COMPAT).
  1433. To use this you need GCC version 4.0.0 or later.
  1434. config OABI_COMPAT
  1435. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1436. depends on AEABI && !THUMB2_KERNEL
  1437. default y
  1438. help
  1439. This option preserves the old syscall interface along with the
  1440. new (ARM EABI) one. It also provides a compatibility layer to
  1441. intercept syscalls that have structure arguments which layout
  1442. in memory differs between the legacy ABI and the new ARM EABI
  1443. (only for non "thumb" binaries). This option adds a tiny
  1444. overhead to all syscalls and produces a slightly larger kernel.
  1445. If you know you'll be using only pure EABI user space then you
  1446. can say N here. If this option is not selected and you attempt
  1447. to execute a legacy ABI binary then the result will be
  1448. UNPREDICTABLE (in fact it can be predicted that it won't work
  1449. at all). If in doubt say Y.
  1450. config ARCH_HAS_HOLES_MEMORYMODEL
  1451. bool
  1452. config ARCH_SPARSEMEM_ENABLE
  1453. bool
  1454. config ARCH_SPARSEMEM_DEFAULT
  1455. def_bool ARCH_SPARSEMEM_ENABLE
  1456. config ARCH_SELECT_MEMORY_MODEL
  1457. def_bool ARCH_SPARSEMEM_ENABLE
  1458. config HAVE_ARCH_PFN_VALID
  1459. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1460. config HIGHMEM
  1461. bool "High Memory Support"
  1462. depends on MMU
  1463. help
  1464. The address space of ARM processors is only 4 Gigabytes large
  1465. and it has to accommodate user address space, kernel address
  1466. space as well as some memory mapped IO. That means that, if you
  1467. have a large amount of physical memory and/or IO, not all of the
  1468. memory can be "permanently mapped" by the kernel. The physical
  1469. memory that is not permanently mapped is called "high memory".
  1470. Depending on the selected kernel/user memory split, minimum
  1471. vmalloc space and actual amount of RAM, you may not need this
  1472. option which should result in a slightly faster kernel.
  1473. If unsure, say n.
  1474. config HIGHPTE
  1475. bool "Allocate 2nd-level pagetables from highmem"
  1476. depends on HIGHMEM
  1477. config HW_PERF_EVENTS
  1478. bool "Enable hardware performance counter support for perf events"
  1479. depends on PERF_EVENTS
  1480. default y
  1481. help
  1482. Enable hardware performance counter support for perf events. If
  1483. disabled, perf events will use software events only.
  1484. config SYS_SUPPORTS_HUGETLBFS
  1485. def_bool y
  1486. depends on ARM_LPAE
  1487. config HAVE_ARCH_TRANSPARENT_HUGEPAGE
  1488. def_bool y
  1489. depends on ARM_LPAE
  1490. config ARCH_WANT_GENERAL_HUGETLB
  1491. def_bool y
  1492. source "mm/Kconfig"
  1493. config FORCE_MAX_ZONEORDER
  1494. int "Maximum zone order" if ARCH_SHMOBILE
  1495. range 11 64 if ARCH_SHMOBILE
  1496. default "12" if SOC_AM33XX
  1497. default "9" if SA1111
  1498. default "11"
  1499. help
  1500. The kernel memory allocator divides physically contiguous memory
  1501. blocks into "zones", where each zone is a power of two number of
  1502. pages. This option selects the largest power of two that the kernel
  1503. keeps in the memory allocator. If you need to allocate very large
  1504. blocks of physically contiguous memory, then you may need to
  1505. increase this value.
  1506. This config option is actually maximum order plus one. For example,
  1507. a value of 11 means that the largest free memory block is 2^10 pages.
  1508. config ALIGNMENT_TRAP
  1509. bool
  1510. depends on CPU_CP15_MMU
  1511. default y if !ARCH_EBSA110
  1512. select HAVE_PROC_CPU if PROC_FS
  1513. help
  1514. ARM processors cannot fetch/store information which is not
  1515. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1516. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1517. fetch/store instructions will be emulated in software if you say
  1518. here, which has a severe performance impact. This is necessary for
  1519. correct operation of some network protocols. With an IP-only
  1520. configuration it is safe to say N, otherwise say Y.
  1521. config UACCESS_WITH_MEMCPY
  1522. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1523. depends on MMU
  1524. default y if CPU_FEROCEON
  1525. help
  1526. Implement faster copy_to_user and clear_user methods for CPU
  1527. cores where a 8-word STM instruction give significantly higher
  1528. memory write throughput than a sequence of individual 32bit stores.
  1529. A possible side effect is a slight increase in scheduling latency
  1530. between threads sharing the same address space if they invoke
  1531. such copy operations with large buffers.
  1532. However, if the CPU data cache is using a write-allocate mode,
  1533. this option is unlikely to provide any performance gain.
  1534. config SECCOMP
  1535. bool
  1536. prompt "Enable seccomp to safely compute untrusted bytecode"
  1537. ---help---
  1538. This kernel feature is useful for number crunching applications
  1539. that may need to compute untrusted bytecode during their
  1540. execution. By using pipes or other transports made available to
  1541. the process as file descriptors supporting the read/write
  1542. syscalls, it's possible to isolate those applications in
  1543. their own address space using seccomp. Once seccomp is
  1544. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1545. and the task is only allowed to execute a few safe syscalls
  1546. defined by each seccomp mode.
  1547. config CC_STACKPROTECTOR
  1548. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1549. help
  1550. This option turns on the -fstack-protector GCC feature. This
  1551. feature puts, at the beginning of functions, a canary value on
  1552. the stack just before the return address, and validates
  1553. the value just before actually returning. Stack based buffer
  1554. overflows (that need to overwrite this return address) now also
  1555. overwrite the canary, which gets detected and the attack is then
  1556. neutralized via a kernel panic.
  1557. This feature requires gcc version 4.2 or above.
  1558. config XEN_DOM0
  1559. def_bool y
  1560. depends on XEN
  1561. config XEN
  1562. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1563. depends on ARM && AEABI && OF
  1564. depends on CPU_V7 && !CPU_V6
  1565. depends on !GENERIC_ATOMIC64
  1566. select ARM_PSCI
  1567. help
  1568. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1569. endmenu
  1570. menu "Boot options"
  1571. config USE_OF
  1572. bool "Flattened Device Tree support"
  1573. select IRQ_DOMAIN
  1574. select OF
  1575. select OF_EARLY_FLATTREE
  1576. help
  1577. Include support for flattened device tree machine descriptions.
  1578. config ATAGS
  1579. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1580. default y
  1581. help
  1582. This is the traditional way of passing data to the kernel at boot
  1583. time. If you are solely relying on the flattened device tree (or
  1584. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1585. to remove ATAGS support from your kernel binary. If unsure,
  1586. leave this to y.
  1587. config DEPRECATED_PARAM_STRUCT
  1588. bool "Provide old way to pass kernel parameters"
  1589. depends on ATAGS
  1590. help
  1591. This was deprecated in 2001 and announced to live on for 5 years.
  1592. Some old boot loaders still use this way.
  1593. # Compressed boot loader in ROM. Yes, we really want to ask about
  1594. # TEXT and BSS so we preserve their values in the config files.
  1595. config ZBOOT_ROM_TEXT
  1596. hex "Compressed ROM boot loader base address"
  1597. default "0"
  1598. help
  1599. The physical address at which the ROM-able zImage is to be
  1600. placed in the target. Platforms which normally make use of
  1601. ROM-able zImage formats normally set this to a suitable
  1602. value in their defconfig file.
  1603. If ZBOOT_ROM is not enabled, this has no effect.
  1604. config ZBOOT_ROM_BSS
  1605. hex "Compressed ROM boot loader BSS address"
  1606. default "0"
  1607. help
  1608. The base address of an area of read/write memory in the target
  1609. for the ROM-able zImage which must be available while the
  1610. decompressor is running. It must be large enough to hold the
  1611. entire decompressed kernel plus an additional 128 KiB.
  1612. Platforms which normally make use of ROM-able zImage formats
  1613. normally set this to a suitable value in their defconfig file.
  1614. If ZBOOT_ROM is not enabled, this has no effect.
  1615. config ZBOOT_ROM
  1616. bool "Compressed boot loader in ROM/flash"
  1617. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1618. help
  1619. Say Y here if you intend to execute your compressed kernel image
  1620. (zImage) directly from ROM or flash. If unsure, say N.
  1621. choice
  1622. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1623. depends on ZBOOT_ROM && ARCH_SH7372
  1624. default ZBOOT_ROM_NONE
  1625. help
  1626. Include experimental SD/MMC loading code in the ROM-able zImage.
  1627. With this enabled it is possible to write the ROM-able zImage
  1628. kernel image to an MMC or SD card and boot the kernel straight
  1629. from the reset vector. At reset the processor Mask ROM will load
  1630. the first part of the ROM-able zImage which in turn loads the
  1631. rest the kernel image to RAM.
  1632. config ZBOOT_ROM_NONE
  1633. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1634. help
  1635. Do not load image from SD or MMC
  1636. config ZBOOT_ROM_MMCIF
  1637. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1638. help
  1639. Load image from MMCIF hardware block.
  1640. config ZBOOT_ROM_SH_MOBILE_SDHI
  1641. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1642. help
  1643. Load image from SDHI hardware block
  1644. endchoice
  1645. config ARM_APPENDED_DTB
  1646. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1647. depends on OF && !ZBOOT_ROM
  1648. help
  1649. With this option, the boot code will look for a device tree binary
  1650. (DTB) appended to zImage
  1651. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1652. This is meant as a backward compatibility convenience for those
  1653. systems with a bootloader that can't be upgraded to accommodate
  1654. the documented boot protocol using a device tree.
  1655. Beware that there is very little in terms of protection against
  1656. this option being confused by leftover garbage in memory that might
  1657. look like a DTB header after a reboot if no actual DTB is appended
  1658. to zImage. Do not leave this option active in a production kernel
  1659. if you don't intend to always append a DTB. Proper passing of the
  1660. location into r2 of a bootloader provided DTB is always preferable
  1661. to this option.
  1662. config ARM_ATAG_DTB_COMPAT
  1663. bool "Supplement the appended DTB with traditional ATAG information"
  1664. depends on ARM_APPENDED_DTB
  1665. help
  1666. Some old bootloaders can't be updated to a DTB capable one, yet
  1667. they provide ATAGs with memory configuration, the ramdisk address,
  1668. the kernel cmdline string, etc. Such information is dynamically
  1669. provided by the bootloader and can't always be stored in a static
  1670. DTB. To allow a device tree enabled kernel to be used with such
  1671. bootloaders, this option allows zImage to extract the information
  1672. from the ATAG list and store it at run time into the appended DTB.
  1673. choice
  1674. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1675. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1676. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1677. bool "Use bootloader kernel arguments if available"
  1678. help
  1679. Uses the command-line options passed by the boot loader instead of
  1680. the device tree bootargs property. If the boot loader doesn't provide
  1681. any, the device tree bootargs property will be used.
  1682. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1683. bool "Extend with bootloader kernel arguments"
  1684. help
  1685. The command-line arguments provided by the boot loader will be
  1686. appended to the the device tree bootargs property.
  1687. endchoice
  1688. config CMDLINE
  1689. string "Default kernel command string"
  1690. default ""
  1691. help
  1692. On some architectures (EBSA110 and CATS), there is currently no way
  1693. for the boot loader to pass arguments to the kernel. For these
  1694. architectures, you should supply some command-line options at build
  1695. time by entering them here. As a minimum, you should specify the
  1696. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1697. choice
  1698. prompt "Kernel command line type" if CMDLINE != ""
  1699. default CMDLINE_FROM_BOOTLOADER
  1700. depends on ATAGS
  1701. config CMDLINE_FROM_BOOTLOADER
  1702. bool "Use bootloader kernel arguments if available"
  1703. help
  1704. Uses the command-line options passed by the boot loader. If
  1705. the boot loader doesn't provide any, the default kernel command
  1706. string provided in CMDLINE will be used.
  1707. config CMDLINE_EXTEND
  1708. bool "Extend bootloader kernel arguments"
  1709. help
  1710. The command-line arguments provided by the boot loader will be
  1711. appended to the default kernel command string.
  1712. config CMDLINE_FORCE
  1713. bool "Always use the default kernel command string"
  1714. help
  1715. Always use the default kernel command string, even if the boot
  1716. loader passes other arguments to the kernel.
  1717. This is useful if you cannot or don't want to change the
  1718. command-line options your boot loader passes to the kernel.
  1719. endchoice
  1720. config XIP_KERNEL
  1721. bool "Kernel Execute-In-Place from ROM"
  1722. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1723. help
  1724. Execute-In-Place allows the kernel to run from non-volatile storage
  1725. directly addressable by the CPU, such as NOR flash. This saves RAM
  1726. space since the text section of the kernel is not loaded from flash
  1727. to RAM. Read-write sections, such as the data section and stack,
  1728. are still copied to RAM. The XIP kernel is not compressed since
  1729. it has to run directly from flash, so it will take more space to
  1730. store it. The flash address used to link the kernel object files,
  1731. and for storing it, is configuration dependent. Therefore, if you
  1732. say Y here, you must know the proper physical address where to
  1733. store the kernel image depending on your own flash memory usage.
  1734. Also note that the make target becomes "make xipImage" rather than
  1735. "make zImage" or "make Image". The final kernel binary to put in
  1736. ROM memory will be arch/arm/boot/xipImage.
  1737. If unsure, say N.
  1738. config XIP_PHYS_ADDR
  1739. hex "XIP Kernel Physical Location"
  1740. depends on XIP_KERNEL
  1741. default "0x00080000"
  1742. help
  1743. This is the physical address in your flash memory the kernel will
  1744. be linked for and stored to. This address is dependent on your
  1745. own flash usage.
  1746. config KEXEC
  1747. bool "Kexec system call (EXPERIMENTAL)"
  1748. depends on (!SMP || PM_SLEEP_SMP)
  1749. help
  1750. kexec is a system call that implements the ability to shutdown your
  1751. current kernel, and to start another kernel. It is like a reboot
  1752. but it is independent of the system firmware. And like a reboot
  1753. you can start any kernel with it, not just Linux.
  1754. It is an ongoing process to be certain the hardware in a machine
  1755. is properly shutdown, so do not be surprised if this code does not
  1756. initially work for you.
  1757. config ATAGS_PROC
  1758. bool "Export atags in procfs"
  1759. depends on ATAGS && KEXEC
  1760. default y
  1761. help
  1762. Should the atags used to boot the kernel be exported in an "atags"
  1763. file in procfs. Useful with kexec.
  1764. config CRASH_DUMP
  1765. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1766. help
  1767. Generate crash dump after being started by kexec. This should
  1768. be normally only set in special crash dump kernels which are
  1769. loaded in the main kernel with kexec-tools into a specially
  1770. reserved region and then later executed after a crash by
  1771. kdump/kexec. The crash dump kernel must be compiled to a
  1772. memory address not used by the main kernel
  1773. For more details see Documentation/kdump/kdump.txt
  1774. config AUTO_ZRELADDR
  1775. bool "Auto calculation of the decompressed kernel image address"
  1776. depends on !ZBOOT_ROM
  1777. help
  1778. ZRELADDR is the physical address where the decompressed kernel
  1779. image will be placed. If AUTO_ZRELADDR is selected, the address
  1780. will be determined at run-time by masking the current IP with
  1781. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1782. from start of memory.
  1783. endmenu
  1784. menu "CPU Power Management"
  1785. if ARCH_HAS_CPUFREQ
  1786. source "drivers/cpufreq/Kconfig"
  1787. endif
  1788. source "drivers/cpuidle/Kconfig"
  1789. endmenu
  1790. menu "Floating point emulation"
  1791. comment "At least one emulation must be selected"
  1792. config FPE_NWFPE
  1793. bool "NWFPE math emulation"
  1794. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1795. ---help---
  1796. Say Y to include the NWFPE floating point emulator in the kernel.
  1797. This is necessary to run most binaries. Linux does not currently
  1798. support floating point hardware so you need to say Y here even if
  1799. your machine has an FPA or floating point co-processor podule.
  1800. You may say N here if you are going to load the Acorn FPEmulator
  1801. early in the bootup.
  1802. config FPE_NWFPE_XP
  1803. bool "Support extended precision"
  1804. depends on FPE_NWFPE
  1805. help
  1806. Say Y to include 80-bit support in the kernel floating-point
  1807. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1808. Note that gcc does not generate 80-bit operations by default,
  1809. so in most cases this option only enlarges the size of the
  1810. floating point emulator without any good reason.
  1811. You almost surely want to say N here.
  1812. config FPE_FASTFPE
  1813. bool "FastFPE math emulation (EXPERIMENTAL)"
  1814. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
  1815. ---help---
  1816. Say Y here to include the FAST floating point emulator in the kernel.
  1817. This is an experimental much faster emulator which now also has full
  1818. precision for the mantissa. It does not support any exceptions.
  1819. It is very simple, and approximately 3-6 times faster than NWFPE.
  1820. It should be sufficient for most programs. It may be not suitable
  1821. for scientific calculations, but you have to check this for yourself.
  1822. If you do not feel you need a faster FP emulation you should better
  1823. choose NWFPE.
  1824. config VFP
  1825. bool "VFP-format floating point maths"
  1826. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1827. help
  1828. Say Y to include VFP support code in the kernel. This is needed
  1829. if your hardware includes a VFP unit.
  1830. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1831. release notes and additional status information.
  1832. Say N if your target does not have VFP hardware.
  1833. config VFPv3
  1834. bool
  1835. depends on VFP
  1836. default y if CPU_V7
  1837. config NEON
  1838. bool "Advanced SIMD (NEON) Extension support"
  1839. depends on VFPv3 && CPU_V7
  1840. help
  1841. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1842. Extension.
  1843. config KERNEL_MODE_NEON
  1844. bool "Support for NEON in kernel mode"
  1845. depends on NEON && AEABI
  1846. help
  1847. Say Y to include support for NEON in kernel mode.
  1848. endmenu
  1849. menu "Userspace binary formats"
  1850. source "fs/Kconfig.binfmt"
  1851. config ARTHUR
  1852. tristate "RISC OS personality"
  1853. depends on !AEABI
  1854. help
  1855. Say Y here to include the kernel code necessary if you want to run
  1856. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1857. experimental; if this sounds frightening, say N and sleep in peace.
  1858. You can also say M here to compile this support as a module (which
  1859. will be called arthur).
  1860. endmenu
  1861. menu "Power management options"
  1862. source "kernel/power/Kconfig"
  1863. config ARCH_SUSPEND_POSSIBLE
  1864. depends on !ARCH_S5PC100
  1865. depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
  1866. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1867. def_bool y
  1868. config ARM_CPU_SUSPEND
  1869. def_bool PM_SLEEP
  1870. endmenu
  1871. source "net/Kconfig"
  1872. source "drivers/Kconfig"
  1873. source "fs/Kconfig"
  1874. source "arch/arm/Kconfig.debug"
  1875. source "security/Kconfig"
  1876. source "crypto/Kconfig"
  1877. source "lib/Kconfig"
  1878. source "arch/arm/kvm/Kconfig"