Kconfig 64 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361136213631364136513661367136813691370137113721373137413751376137713781379138013811382138313841385138613871388138913901391139213931394139513961397139813991400140114021403140414051406140714081409141014111412141314141415141614171418141914201421142214231424142514261427142814291430143114321433143414351436143714381439144014411442144314441445144614471448144914501451145214531454145514561457145814591460146114621463146414651466146714681469147014711472147314741475147614771478147914801481148214831484148514861487148814891490149114921493149414951496149714981499150015011502150315041505150615071508150915101511151215131514151515161517151815191520152115221523152415251526152715281529153015311532153315341535153615371538153915401541154215431544154515461547154815491550155115521553155415551556155715581559156015611562156315641565156615671568156915701571157215731574157515761577157815791580158115821583158415851586158715881589159015911592159315941595159615971598159916001601160216031604160516061607160816091610161116121613161416151616161716181619162016211622162316241625162616271628162916301631163216331634163516361637163816391640164116421643164416451646164716481649165016511652165316541655165616571658165916601661166216631664166516661667166816691670167116721673167416751676167716781679168016811682168316841685168616871688168916901691169216931694169516961697169816991700170117021703170417051706170717081709171017111712171317141715171617171718171917201721172217231724172517261727172817291730173117321733173417351736173717381739174017411742174317441745174617471748174917501751175217531754175517561757175817591760176117621763176417651766176717681769177017711772177317741775177617771778177917801781178217831784178517861787178817891790179117921793179417951796179717981799180018011802180318041805180618071808180918101811181218131814181518161817181818191820182118221823182418251826182718281829183018311832183318341835183618371838183918401841184218431844184518461847184818491850185118521853185418551856185718581859186018611862186318641865186618671868186918701871187218731874187518761877187818791880188118821883188418851886188718881889189018911892189318941895189618971898189919001901190219031904190519061907190819091910191119121913191419151916191719181919192019211922192319241925192619271928192919301931193219331934193519361937193819391940194119421943194419451946194719481949195019511952195319541955195619571958195919601961196219631964196519661967196819691970197119721973197419751976197719781979198019811982198319841985198619871988198919901991199219931994199519961997199819992000200120022003200420052006200720082009201020112012201320142015201620172018201920202021202220232024202520262027202820292030203120322033203420352036203720382039204020412042204320442045204620472048204920502051205220532054205520562057205820592060206120622063206420652066206720682069207020712072207320742075207620772078207920802081208220832084208520862087208820892090209120922093209420952096209720982099210021012102210321042105210621072108210921102111211221132114211521162117211821192120212121222123212421252126212721282129213021312132213321342135213621372138213921402141214221432144214521462147214821492150215121522153215421552156215721582159216021612162216321642165216621672168216921702171217221732174217521762177217821792180218121822183218421852186218721882189219021912192219321942195219621972198219922002201220222032204220522062207220822092210221122122213221422152216221722182219222022212222222322242225222622272228222922302231
  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_HAVE_CUSTOM_GPIO_H
  7. select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
  8. select ARCH_WANT_IPC_PARSE_VERSION
  9. select BUILDTIME_EXTABLE_SORT if MMU
  10. select CPU_PM if (SUSPEND || CPU_IDLE)
  11. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
  12. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  13. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  14. select GENERIC_IRQ_PROBE
  15. select GENERIC_IRQ_SHOW
  16. select GENERIC_PCI_IOMAP
  17. select GENERIC_SMP_IDLE_THREAD
  18. select GENERIC_STRNCPY_FROM_USER
  19. select GENERIC_STRNLEN_USER
  20. select HARDIRQS_SW_RESEND
  21. select HAVE_AOUT
  22. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  23. select HAVE_ARCH_KGDB
  24. select HAVE_ARCH_SECCOMP_FILTER
  25. select HAVE_ARCH_TRACEHOOK
  26. select HAVE_BPF_JIT
  27. select HAVE_C_RECORDMCOUNT
  28. select HAVE_DEBUG_KMEMLEAK
  29. select HAVE_DMA_API_DEBUG
  30. select HAVE_DMA_ATTRS
  31. select HAVE_DMA_CONTIGUOUS if MMU
  32. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  33. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  34. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  35. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  36. select HAVE_GENERIC_DMA_COHERENT
  37. select HAVE_GENERIC_HARDIRQS
  38. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  39. select HAVE_IDE if PCI || ISA || PCMCIA
  40. select HAVE_KERNEL_GZIP
  41. select HAVE_KERNEL_LZMA
  42. select HAVE_KERNEL_LZO
  43. select HAVE_KERNEL_XZ
  44. select HAVE_KPROBES if !XIP_KERNEL
  45. select HAVE_KRETPROBES if (HAVE_KPROBES)
  46. select HAVE_MEMBLOCK
  47. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  48. select HAVE_PERF_EVENTS
  49. select HAVE_REGS_AND_STACK_ACCESS_API
  50. select HAVE_SYSCALL_TRACEPOINTS
  51. select HAVE_UID16
  52. select KTIME_SCALAR
  53. select PERF_USE_VMALLOC
  54. select RTC_LIB
  55. select SYS_SUPPORTS_APM_EMULATION
  56. select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
  57. select MODULES_USE_ELF_REL
  58. select CLONE_BACKWARDS
  59. select OLD_SIGSUSPEND3
  60. select OLD_SIGACTION
  61. help
  62. The ARM series is a line of low-power-consumption RISC chip designs
  63. licensed by ARM Ltd and targeted at embedded applications and
  64. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  65. manufactured, but legacy ARM-based PC hardware remains popular in
  66. Europe. There is an ARM Linux project with a web page at
  67. <http://www.arm.linux.org.uk/>.
  68. config ARM_HAS_SG_CHAIN
  69. bool
  70. config NEED_SG_DMA_LENGTH
  71. bool
  72. config ARM_DMA_USE_IOMMU
  73. bool
  74. select ARM_HAS_SG_CHAIN
  75. select NEED_SG_DMA_LENGTH
  76. if ARM_DMA_USE_IOMMU
  77. config ARM_DMA_IOMMU_ALIGNMENT
  78. int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
  79. range 4 9
  80. default 8
  81. help
  82. DMA mapping framework by default aligns all buffers to the smallest
  83. PAGE_SIZE order which is greater than or equal to the requested buffer
  84. size. This works well for buffers up to a few hundreds kilobytes, but
  85. for larger buffers it just a waste of address space. Drivers which has
  86. relatively small addressing window (like 64Mib) might run out of
  87. virtual space with just a few allocations.
  88. With this parameter you can specify the maximum PAGE_SIZE order for
  89. DMA IOMMU buffers. Larger buffers will be aligned only to this
  90. specified order. The order is expressed as a power of two multiplied
  91. by the PAGE_SIZE.
  92. endif
  93. config HAVE_PWM
  94. bool
  95. config MIGHT_HAVE_PCI
  96. bool
  97. config SYS_SUPPORTS_APM_EMULATION
  98. bool
  99. config GENERIC_GPIO
  100. bool
  101. config HAVE_TCM
  102. bool
  103. select GENERIC_ALLOCATOR
  104. config HAVE_PROC_CPU
  105. bool
  106. config NO_IOPORT
  107. bool
  108. config EISA
  109. bool
  110. ---help---
  111. The Extended Industry Standard Architecture (EISA) bus was
  112. developed as an open alternative to the IBM MicroChannel bus.
  113. The EISA bus provided some of the features of the IBM MicroChannel
  114. bus while maintaining backward compatibility with cards made for
  115. the older ISA bus. The EISA bus saw limited use between 1988 and
  116. 1995 when it was made obsolete by the PCI bus.
  117. Say Y here if you are building a kernel for an EISA-based machine.
  118. Otherwise, say N.
  119. config SBUS
  120. bool
  121. config STACKTRACE_SUPPORT
  122. bool
  123. default y
  124. config HAVE_LATENCYTOP_SUPPORT
  125. bool
  126. depends on !SMP
  127. default y
  128. config LOCKDEP_SUPPORT
  129. bool
  130. default y
  131. config TRACE_IRQFLAGS_SUPPORT
  132. bool
  133. default y
  134. config RWSEM_GENERIC_SPINLOCK
  135. bool
  136. default y
  137. config RWSEM_XCHGADD_ALGORITHM
  138. bool
  139. config ARCH_HAS_ILOG2_U32
  140. bool
  141. config ARCH_HAS_ILOG2_U64
  142. bool
  143. config ARCH_HAS_CPUFREQ
  144. bool
  145. help
  146. Internal node to signify that the ARCH has CPUFREQ support
  147. and that the relevant menu configurations are displayed for
  148. it.
  149. config GENERIC_HWEIGHT
  150. bool
  151. default y
  152. config GENERIC_CALIBRATE_DELAY
  153. bool
  154. default y
  155. config ARCH_MAY_HAVE_PC_FDC
  156. bool
  157. config ZONE_DMA
  158. bool
  159. config NEED_DMA_MAP_STATE
  160. def_bool y
  161. config ARCH_HAS_DMA_SET_COHERENT_MASK
  162. bool
  163. config GENERIC_ISA_DMA
  164. bool
  165. config FIQ
  166. bool
  167. config NEED_RET_TO_USER
  168. bool
  169. config ARCH_MTD_XIP
  170. bool
  171. config VECTORS_BASE
  172. hex
  173. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  174. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  175. default 0x00000000
  176. help
  177. The base address of exception vectors.
  178. config ARM_PATCH_PHYS_VIRT
  179. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  180. default y
  181. depends on !XIP_KERNEL && MMU
  182. depends on !ARCH_REALVIEW || !SPARSEMEM
  183. help
  184. Patch phys-to-virt and virt-to-phys translation functions at
  185. boot and module load time according to the position of the
  186. kernel in system memory.
  187. This can only be used with non-XIP MMU kernels where the base
  188. of physical memory is at a 16MB boundary.
  189. Only disable this option if you know that you do not require
  190. this feature (eg, building a kernel for a single machine) and
  191. you need to shrink the kernel to the minimal size.
  192. config NEED_MACH_GPIO_H
  193. bool
  194. help
  195. Select this when mach/gpio.h is required to provide special
  196. definitions for this platform. The need for mach/gpio.h should
  197. be avoided when possible.
  198. config NEED_MACH_IO_H
  199. bool
  200. help
  201. Select this when mach/io.h is required to provide special
  202. definitions for this platform. The need for mach/io.h should
  203. be avoided when possible.
  204. config NEED_MACH_MEMORY_H
  205. bool
  206. help
  207. Select this when mach/memory.h is required to provide special
  208. definitions for this platform. The need for mach/memory.h should
  209. be avoided when possible.
  210. config PHYS_OFFSET
  211. hex "Physical address of main memory" if MMU
  212. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  213. default DRAM_BASE if !MMU
  214. help
  215. Please provide the physical address corresponding to the
  216. location of main memory in your system.
  217. config GENERIC_BUG
  218. def_bool y
  219. depends on BUG
  220. source "init/Kconfig"
  221. source "kernel/Kconfig.freezer"
  222. menu "System Type"
  223. config MMU
  224. bool "MMU-based Paged Memory Management Support"
  225. default y
  226. help
  227. Select if you want MMU-based virtualised addressing space
  228. support by paged memory management. If unsure, say 'Y'.
  229. #
  230. # The "ARM system type" choice list is ordered alphabetically by option
  231. # text. Please add new entries in the option alphabetic order.
  232. #
  233. choice
  234. prompt "ARM system type"
  235. default ARCH_VERSATILE if !MMU
  236. default ARCH_MULTIPLATFORM if MMU
  237. config ARCH_MULTIPLATFORM
  238. bool "Allow multiple platforms to be selected"
  239. depends on MMU
  240. select ARM_PATCH_PHYS_VIRT
  241. select AUTO_ZRELADDR
  242. select COMMON_CLK
  243. select MULTI_IRQ_HANDLER
  244. select SPARSE_IRQ
  245. select USE_OF
  246. config ARCH_INTEGRATOR
  247. bool "ARM Ltd. Integrator family"
  248. select ARCH_HAS_CPUFREQ
  249. select ARM_AMBA
  250. select COMMON_CLK
  251. select COMMON_CLK_VERSATILE
  252. select GENERIC_CLOCKEVENTS
  253. select HAVE_TCM
  254. select ICST
  255. select MULTI_IRQ_HANDLER
  256. select NEED_MACH_MEMORY_H
  257. select PLAT_VERSATILE
  258. select SPARSE_IRQ
  259. select VERSATILE_FPGA_IRQ
  260. help
  261. Support for ARM's Integrator platform.
  262. config ARCH_REALVIEW
  263. bool "ARM Ltd. RealView family"
  264. select ARCH_WANT_OPTIONAL_GPIOLIB
  265. select ARM_AMBA
  266. select ARM_TIMER_SP804
  267. select COMMON_CLK
  268. select COMMON_CLK_VERSATILE
  269. select GENERIC_CLOCKEVENTS
  270. select GPIO_PL061 if GPIOLIB
  271. select ICST
  272. select NEED_MACH_MEMORY_H
  273. select PLAT_VERSATILE
  274. select PLAT_VERSATILE_CLCD
  275. help
  276. This enables support for ARM Ltd RealView boards.
  277. config ARCH_VERSATILE
  278. bool "ARM Ltd. Versatile family"
  279. select ARCH_WANT_OPTIONAL_GPIOLIB
  280. select ARM_AMBA
  281. select ARM_TIMER_SP804
  282. select ARM_VIC
  283. select CLKDEV_LOOKUP
  284. select GENERIC_CLOCKEVENTS
  285. select HAVE_MACH_CLKDEV
  286. select ICST
  287. select PLAT_VERSATILE
  288. select PLAT_VERSATILE_CLCD
  289. select PLAT_VERSATILE_CLOCK
  290. select VERSATILE_FPGA_IRQ
  291. help
  292. This enables support for ARM Ltd Versatile board.
  293. config ARCH_AT91
  294. bool "Atmel AT91"
  295. select ARCH_REQUIRE_GPIOLIB
  296. select CLKDEV_LOOKUP
  297. select HAVE_CLK
  298. select IRQ_DOMAIN
  299. select NEED_MACH_GPIO_H
  300. select NEED_MACH_IO_H if PCCARD
  301. select PINCTRL
  302. select PINCTRL_AT91 if USE_OF
  303. help
  304. This enables support for systems based on Atmel
  305. AT91RM9200 and AT91SAM9* processors.
  306. config ARCH_CLPS711X
  307. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  308. select ARCH_REQUIRE_GPIOLIB
  309. select AUTO_ZRELADDR
  310. select CLKDEV_LOOKUP
  311. select COMMON_CLK
  312. select CPU_ARM720T
  313. select GENERIC_CLOCKEVENTS
  314. select MULTI_IRQ_HANDLER
  315. select NEED_MACH_MEMORY_H
  316. select SPARSE_IRQ
  317. help
  318. Support for Cirrus Logic 711x/721x/731x based boards.
  319. config ARCH_GEMINI
  320. bool "Cortina Systems Gemini"
  321. select ARCH_REQUIRE_GPIOLIB
  322. select ARCH_USES_GETTIMEOFFSET
  323. select CPU_FA526
  324. help
  325. Support for the Cortina Systems Gemini family SoCs
  326. config ARCH_EBSA110
  327. bool "EBSA-110"
  328. select ARCH_USES_GETTIMEOFFSET
  329. select CPU_SA110
  330. select ISA
  331. select NEED_MACH_IO_H
  332. select NEED_MACH_MEMORY_H
  333. select NO_IOPORT
  334. help
  335. This is an evaluation board for the StrongARM processor available
  336. from Digital. It has limited hardware on-board, including an
  337. Ethernet interface, two PCMCIA sockets, two serial ports and a
  338. parallel port.
  339. config ARCH_EP93XX
  340. bool "EP93xx-based"
  341. select ARCH_HAS_HOLES_MEMORYMODEL
  342. select ARCH_REQUIRE_GPIOLIB
  343. select ARCH_USES_GETTIMEOFFSET
  344. select ARM_AMBA
  345. select ARM_VIC
  346. select CLKDEV_LOOKUP
  347. select CPU_ARM920T
  348. select NEED_MACH_MEMORY_H
  349. help
  350. This enables support for the Cirrus EP93xx series of CPUs.
  351. config ARCH_FOOTBRIDGE
  352. bool "FootBridge"
  353. select CPU_SA110
  354. select FOOTBRIDGE
  355. select GENERIC_CLOCKEVENTS
  356. select HAVE_IDE
  357. select NEED_MACH_IO_H if !MMU
  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_NETX
  363. bool "Hilscher NetX based"
  364. select ARM_VIC
  365. select CLKSRC_MMIO
  366. select CPU_ARM926T
  367. select GENERIC_CLOCKEVENTS
  368. help
  369. This enables support for systems based on the Hilscher NetX Soc
  370. config ARCH_H720X
  371. bool "Hynix HMS720x-based"
  372. select ARCH_USES_GETTIMEOFFSET
  373. select CPU_ARM720T
  374. select ISA_DMA_API
  375. help
  376. This enables support for systems based on the Hynix HMS720x
  377. config ARCH_IOP13XX
  378. bool "IOP13xx-based"
  379. depends on MMU
  380. select ARCH_SUPPORTS_MSI
  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. help
  424. Support for Intel's IXP4XX (XScale) family of processors.
  425. config ARCH_DOVE
  426. bool "Marvell Dove"
  427. select ARCH_REQUIRE_GPIOLIB
  428. select CPU_V7
  429. select GENERIC_CLOCKEVENTS
  430. select MIGHT_HAVE_PCI
  431. select PINCTRL
  432. select PINCTRL_DOVE
  433. select PLAT_ORION_LEGACY
  434. select USB_ARCH_HAS_EHCI
  435. help
  436. Support for the Marvell Dove SoC 88AP510
  437. config ARCH_KIRKWOOD
  438. bool "Marvell Kirkwood"
  439. select ARCH_REQUIRE_GPIOLIB
  440. select CPU_FEROCEON
  441. select GENERIC_CLOCKEVENTS
  442. select PCI
  443. select PCI_QUIRKS
  444. select PINCTRL
  445. select PINCTRL_KIRKWOOD
  446. select PLAT_ORION_LEGACY
  447. help
  448. Support for the following Marvell Kirkwood series SoCs:
  449. 88F6180, 88F6192 and 88F6281.
  450. config ARCH_MV78XX0
  451. bool "Marvell MV78xx0"
  452. select ARCH_REQUIRE_GPIOLIB
  453. select CPU_FEROCEON
  454. select GENERIC_CLOCKEVENTS
  455. select PCI
  456. select PLAT_ORION_LEGACY
  457. help
  458. Support for the following Marvell MV78xx0 series SoCs:
  459. MV781x0, MV782x0.
  460. config ARCH_ORION5X
  461. bool "Marvell Orion"
  462. depends on MMU
  463. select ARCH_REQUIRE_GPIOLIB
  464. select CPU_FEROCEON
  465. select GENERIC_CLOCKEVENTS
  466. select PCI
  467. select PLAT_ORION_LEGACY
  468. help
  469. Support for the following Marvell Orion 5x series SoCs:
  470. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  471. Orion-2 (5281), Orion-1-90 (6183).
  472. config ARCH_MMP
  473. bool "Marvell PXA168/910/MMP2"
  474. depends on MMU
  475. select ARCH_REQUIRE_GPIOLIB
  476. select CLKDEV_LOOKUP
  477. select GENERIC_ALLOCATOR
  478. select GENERIC_CLOCKEVENTS
  479. select GPIO_PXA
  480. select IRQ_DOMAIN
  481. select NEED_MACH_GPIO_H
  482. select PINCTRL
  483. select PLAT_PXA
  484. select SPARSE_IRQ
  485. help
  486. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  487. config ARCH_KS8695
  488. bool "Micrel/Kendin KS8695"
  489. select ARCH_REQUIRE_GPIOLIB
  490. select CLKSRC_MMIO
  491. select CPU_ARM922T
  492. select GENERIC_CLOCKEVENTS
  493. select NEED_MACH_MEMORY_H
  494. help
  495. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  496. System-on-Chip devices.
  497. config ARCH_W90X900
  498. bool "Nuvoton W90X900 CPU"
  499. select ARCH_REQUIRE_GPIOLIB
  500. select CLKDEV_LOOKUP
  501. select CLKSRC_MMIO
  502. select CPU_ARM926T
  503. select GENERIC_CLOCKEVENTS
  504. help
  505. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  506. At present, the w90x900 has been renamed nuc900, regarding
  507. the ARM series product line, you can login the following
  508. link address to know more.
  509. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  510. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  511. config ARCH_LPC32XX
  512. bool "NXP LPC32XX"
  513. select ARCH_REQUIRE_GPIOLIB
  514. select ARM_AMBA
  515. select CLKDEV_LOOKUP
  516. select CLKSRC_MMIO
  517. select CPU_ARM926T
  518. select GENERIC_CLOCKEVENTS
  519. select HAVE_IDE
  520. select HAVE_PWM
  521. select USB_ARCH_HAS_OHCI
  522. select USE_OF
  523. help
  524. Support for the NXP LPC32XX family of processors
  525. config ARCH_PXA
  526. bool "PXA2xx/PXA3xx-based"
  527. depends on MMU
  528. select ARCH_HAS_CPUFREQ
  529. select ARCH_MTD_XIP
  530. select ARCH_REQUIRE_GPIOLIB
  531. select ARM_CPU_SUSPEND if PM
  532. select AUTO_ZRELADDR
  533. select CLKDEV_LOOKUP
  534. select CLKSRC_MMIO
  535. select GENERIC_CLOCKEVENTS
  536. select GPIO_PXA
  537. select HAVE_IDE
  538. select MULTI_IRQ_HANDLER
  539. select NEED_MACH_GPIO_H
  540. select PLAT_PXA
  541. select SPARSE_IRQ
  542. help
  543. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  544. config ARCH_MSM
  545. bool "Qualcomm MSM"
  546. select ARCH_REQUIRE_GPIOLIB
  547. select CLKDEV_LOOKUP
  548. select GENERIC_CLOCKEVENTS
  549. select HAVE_CLK
  550. help
  551. Support for Qualcomm MSM/QSD based systems. This runs on the
  552. apps processor of the MSM/QSD and depends on a shared memory
  553. interface to the modem processor which runs the baseband
  554. stack and controls some vital subsystems
  555. (clock and power control, etc).
  556. config ARCH_SHMOBILE
  557. bool "Renesas SH-Mobile / R-Mobile"
  558. select CLKDEV_LOOKUP
  559. select GENERIC_CLOCKEVENTS
  560. select HAVE_ARM_SCU if SMP
  561. select HAVE_ARM_TWD if LOCAL_TIMERS
  562. select HAVE_CLK
  563. select HAVE_MACH_CLKDEV
  564. select HAVE_SMP
  565. select MIGHT_HAVE_CACHE_L2X0
  566. select MULTI_IRQ_HANDLER
  567. select NEED_MACH_MEMORY_H
  568. select NO_IOPORT
  569. select PINCTRL
  570. select PM_GENERIC_DOMAINS if PM
  571. select SPARSE_IRQ
  572. help
  573. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  574. config ARCH_RPC
  575. bool "RiscPC"
  576. select ARCH_ACORN
  577. select ARCH_MAY_HAVE_PC_FDC
  578. select ARCH_SPARSEMEM_ENABLE
  579. select ARCH_USES_GETTIMEOFFSET
  580. select FIQ
  581. select HAVE_IDE
  582. select HAVE_PATA_PLATFORM
  583. select ISA_DMA_API
  584. select NEED_MACH_IO_H
  585. select NEED_MACH_MEMORY_H
  586. select NO_IOPORT
  587. select VIRT_TO_BUS
  588. help
  589. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  590. CD-ROM interface, serial and parallel port, and the floppy drive.
  591. config ARCH_SA1100
  592. bool "SA1100-based"
  593. select ARCH_HAS_CPUFREQ
  594. select ARCH_MTD_XIP
  595. select ARCH_REQUIRE_GPIOLIB
  596. select ARCH_SPARSEMEM_ENABLE
  597. select CLKDEV_LOOKUP
  598. select CLKSRC_MMIO
  599. select CPU_FREQ
  600. select CPU_SA1100
  601. select GENERIC_CLOCKEVENTS
  602. select HAVE_IDE
  603. select ISA
  604. select NEED_MACH_GPIO_H
  605. select NEED_MACH_MEMORY_H
  606. select SPARSE_IRQ
  607. help
  608. Support for StrongARM 11x0 based boards.
  609. config ARCH_S3C24XX
  610. bool "Samsung S3C24XX SoCs"
  611. select ARCH_HAS_CPUFREQ
  612. select ARCH_USES_GETTIMEOFFSET
  613. select CLKDEV_LOOKUP
  614. select HAVE_CLK
  615. select HAVE_S3C2410_I2C if I2C
  616. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  617. select HAVE_S3C_RTC if RTC_CLASS
  618. select NEED_MACH_GPIO_H
  619. select NEED_MACH_IO_H
  620. help
  621. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  622. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  623. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  624. Samsung SMDK2410 development board (and derivatives).
  625. config ARCH_S3C64XX
  626. bool "Samsung S3C64XX"
  627. select ARCH_HAS_CPUFREQ
  628. select ARCH_REQUIRE_GPIOLIB
  629. select ARCH_USES_GETTIMEOFFSET
  630. select ARM_VIC
  631. select CLKDEV_LOOKUP
  632. select CPU_V6
  633. select HAVE_CLK
  634. select HAVE_S3C2410_I2C if I2C
  635. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  636. select HAVE_TCM
  637. select NEED_MACH_GPIO_H
  638. select NO_IOPORT
  639. select PLAT_SAMSUNG
  640. select S3C_DEV_NAND
  641. select S3C_GPIO_TRACK
  642. select SAMSUNG_CLKSRC
  643. select SAMSUNG_GPIOLIB_4BIT
  644. select SAMSUNG_IRQ_VIC_TIMER
  645. select USB_ARCH_HAS_OHCI
  646. help
  647. Samsung S3C64XX series based systems
  648. config ARCH_S5P64X0
  649. bool "Samsung S5P6440 S5P6450"
  650. select CLKDEV_LOOKUP
  651. select CLKSRC_MMIO
  652. select CPU_V6
  653. select GENERIC_CLOCKEVENTS
  654. select HAVE_CLK
  655. select HAVE_S3C2410_I2C if I2C
  656. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  657. select HAVE_S3C_RTC if RTC_CLASS
  658. select NEED_MACH_GPIO_H
  659. help
  660. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  661. SMDK6450.
  662. config ARCH_S5PC100
  663. bool "Samsung S5PC100"
  664. select ARCH_USES_GETTIMEOFFSET
  665. select CLKDEV_LOOKUP
  666. select CPU_V7
  667. select HAVE_CLK
  668. select HAVE_S3C2410_I2C if I2C
  669. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  670. select HAVE_S3C_RTC if RTC_CLASS
  671. select NEED_MACH_GPIO_H
  672. help
  673. Samsung S5PC100 series based systems
  674. config ARCH_S5PV210
  675. bool "Samsung S5PV210/S5PC110"
  676. select ARCH_HAS_CPUFREQ
  677. select ARCH_HAS_HOLES_MEMORYMODEL
  678. select ARCH_SPARSEMEM_ENABLE
  679. select CLKDEV_LOOKUP
  680. select CLKSRC_MMIO
  681. select CPU_V7
  682. select GENERIC_CLOCKEVENTS
  683. select HAVE_CLK
  684. select HAVE_S3C2410_I2C if I2C
  685. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  686. select HAVE_S3C_RTC if RTC_CLASS
  687. select NEED_MACH_GPIO_H
  688. select NEED_MACH_MEMORY_H
  689. help
  690. Samsung S5PV210/S5PC110 series based systems
  691. config ARCH_EXYNOS
  692. bool "Samsung EXYNOS"
  693. select ARCH_HAS_CPUFREQ
  694. select ARCH_HAS_HOLES_MEMORYMODEL
  695. select ARCH_SPARSEMEM_ENABLE
  696. select CLKDEV_LOOKUP
  697. select CPU_V7
  698. select GENERIC_CLOCKEVENTS
  699. select HAVE_CLK
  700. select HAVE_S3C2410_I2C if I2C
  701. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  702. select HAVE_S3C_RTC if RTC_CLASS
  703. select NEED_MACH_GPIO_H
  704. select NEED_MACH_MEMORY_H
  705. help
  706. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  707. config ARCH_SHARK
  708. bool "Shark"
  709. select ARCH_USES_GETTIMEOFFSET
  710. select CPU_SA110
  711. select ISA
  712. select ISA_DMA
  713. select NEED_MACH_MEMORY_H
  714. select PCI
  715. select VIRT_TO_BUS
  716. select ZONE_DMA
  717. help
  718. Support for the StrongARM based Digital DNARD machine, also known
  719. as "Shark" (<http://www.shark-linux.de/shark.html>).
  720. config ARCH_U300
  721. bool "ST-Ericsson U300 Series"
  722. depends on MMU
  723. select ARCH_REQUIRE_GPIOLIB
  724. select ARM_AMBA
  725. select ARM_PATCH_PHYS_VIRT
  726. select ARM_VIC
  727. select CLKDEV_LOOKUP
  728. select CLKSRC_MMIO
  729. select COMMON_CLK
  730. select CPU_ARM926T
  731. select GENERIC_CLOCKEVENTS
  732. select HAVE_TCM
  733. select SPARSE_IRQ
  734. help
  735. Support for ST-Ericsson U300 series mobile platforms.
  736. config ARCH_DAVINCI
  737. bool "TI DaVinci"
  738. select ARCH_HAS_HOLES_MEMORYMODEL
  739. select ARCH_REQUIRE_GPIOLIB
  740. select CLKDEV_LOOKUP
  741. select GENERIC_ALLOCATOR
  742. select GENERIC_CLOCKEVENTS
  743. select GENERIC_IRQ_CHIP
  744. select HAVE_IDE
  745. select NEED_MACH_GPIO_H
  746. select USE_OF
  747. select ZONE_DMA
  748. help
  749. Support for TI's DaVinci platform.
  750. config ARCH_OMAP1
  751. bool "TI OMAP1"
  752. depends on MMU
  753. select ARCH_HAS_CPUFREQ
  754. select ARCH_HAS_HOLES_MEMORYMODEL
  755. select ARCH_OMAP
  756. select ARCH_REQUIRE_GPIOLIB
  757. select CLKDEV_LOOKUP
  758. select CLKSRC_MMIO
  759. select GENERIC_CLOCKEVENTS
  760. select GENERIC_IRQ_CHIP
  761. select HAVE_CLK
  762. select HAVE_IDE
  763. select IRQ_DOMAIN
  764. select NEED_MACH_IO_H if PCCARD
  765. select NEED_MACH_MEMORY_H
  766. help
  767. Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
  768. endchoice
  769. menu "Multiple platform selection"
  770. depends on ARCH_MULTIPLATFORM
  771. comment "CPU Core family selection"
  772. config ARCH_MULTI_V4
  773. bool "ARMv4 based platforms (FA526, StrongARM)"
  774. depends on !ARCH_MULTI_V6_V7
  775. select ARCH_MULTI_V4_V5
  776. config ARCH_MULTI_V4T
  777. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  778. depends on !ARCH_MULTI_V6_V7
  779. select ARCH_MULTI_V4_V5
  780. config ARCH_MULTI_V5
  781. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  782. depends on !ARCH_MULTI_V6_V7
  783. select ARCH_MULTI_V4_V5
  784. config ARCH_MULTI_V4_V5
  785. bool
  786. config ARCH_MULTI_V6
  787. bool "ARMv6 based platforms (ARM11)"
  788. select ARCH_MULTI_V6_V7
  789. select CPU_V6
  790. config ARCH_MULTI_V7
  791. bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
  792. default y
  793. select ARCH_MULTI_V6_V7
  794. select ARCH_VEXPRESS
  795. select CPU_V7
  796. config ARCH_MULTI_V6_V7
  797. bool
  798. config ARCH_MULTI_CPU_AUTO
  799. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  800. select ARCH_MULTI_V5
  801. endmenu
  802. #
  803. # This is sorted alphabetically by mach-* pathname. However, plat-*
  804. # Kconfigs may be included either alphabetically (according to the
  805. # plat- suffix) or along side the corresponding mach-* source.
  806. #
  807. source "arch/arm/mach-mvebu/Kconfig"
  808. source "arch/arm/mach-at91/Kconfig"
  809. source "arch/arm/mach-bcm/Kconfig"
  810. source "arch/arm/mach-bcm2835/Kconfig"
  811. source "arch/arm/mach-clps711x/Kconfig"
  812. source "arch/arm/mach-cns3xxx/Kconfig"
  813. source "arch/arm/mach-davinci/Kconfig"
  814. source "arch/arm/mach-dove/Kconfig"
  815. source "arch/arm/mach-ep93xx/Kconfig"
  816. source "arch/arm/mach-footbridge/Kconfig"
  817. source "arch/arm/mach-gemini/Kconfig"
  818. source "arch/arm/mach-h720x/Kconfig"
  819. source "arch/arm/mach-highbank/Kconfig"
  820. source "arch/arm/mach-integrator/Kconfig"
  821. source "arch/arm/mach-iop32x/Kconfig"
  822. source "arch/arm/mach-iop33x/Kconfig"
  823. source "arch/arm/mach-iop13xx/Kconfig"
  824. source "arch/arm/mach-ixp4xx/Kconfig"
  825. source "arch/arm/mach-kirkwood/Kconfig"
  826. source "arch/arm/mach-ks8695/Kconfig"
  827. source "arch/arm/mach-msm/Kconfig"
  828. source "arch/arm/mach-mv78xx0/Kconfig"
  829. source "arch/arm/mach-imx/Kconfig"
  830. source "arch/arm/mach-mxs/Kconfig"
  831. source "arch/arm/mach-netx/Kconfig"
  832. source "arch/arm/mach-nomadik/Kconfig"
  833. source "arch/arm/plat-omap/Kconfig"
  834. source "arch/arm/mach-omap1/Kconfig"
  835. source "arch/arm/mach-omap2/Kconfig"
  836. source "arch/arm/mach-orion5x/Kconfig"
  837. source "arch/arm/mach-picoxcell/Kconfig"
  838. source "arch/arm/mach-pxa/Kconfig"
  839. source "arch/arm/plat-pxa/Kconfig"
  840. source "arch/arm/mach-mmp/Kconfig"
  841. source "arch/arm/mach-realview/Kconfig"
  842. source "arch/arm/mach-sa1100/Kconfig"
  843. source "arch/arm/plat-samsung/Kconfig"
  844. source "arch/arm/mach-socfpga/Kconfig"
  845. source "arch/arm/mach-spear/Kconfig"
  846. source "arch/arm/mach-s3c24xx/Kconfig"
  847. if ARCH_S3C64XX
  848. source "arch/arm/mach-s3c64xx/Kconfig"
  849. endif
  850. source "arch/arm/mach-s5p64x0/Kconfig"
  851. source "arch/arm/mach-s5pc100/Kconfig"
  852. source "arch/arm/mach-s5pv210/Kconfig"
  853. source "arch/arm/mach-exynos/Kconfig"
  854. source "arch/arm/mach-shmobile/Kconfig"
  855. source "arch/arm/mach-sunxi/Kconfig"
  856. source "arch/arm/mach-prima2/Kconfig"
  857. source "arch/arm/mach-tegra/Kconfig"
  858. source "arch/arm/mach-u300/Kconfig"
  859. source "arch/arm/mach-ux500/Kconfig"
  860. source "arch/arm/mach-versatile/Kconfig"
  861. source "arch/arm/mach-vexpress/Kconfig"
  862. source "arch/arm/plat-versatile/Kconfig"
  863. source "arch/arm/mach-virt/Kconfig"
  864. source "arch/arm/mach-vt8500/Kconfig"
  865. source "arch/arm/mach-w90x900/Kconfig"
  866. source "arch/arm/mach-zynq/Kconfig"
  867. # Definitions to make life easier
  868. config ARCH_ACORN
  869. bool
  870. config PLAT_IOP
  871. bool
  872. select GENERIC_CLOCKEVENTS
  873. config PLAT_ORION
  874. bool
  875. select CLKSRC_MMIO
  876. select COMMON_CLK
  877. select GENERIC_IRQ_CHIP
  878. select IRQ_DOMAIN
  879. config PLAT_ORION_LEGACY
  880. bool
  881. select PLAT_ORION
  882. config PLAT_PXA
  883. bool
  884. config PLAT_VERSATILE
  885. bool
  886. config ARM_TIMER_SP804
  887. bool
  888. select CLKSRC_MMIO
  889. select HAVE_SCHED_CLOCK
  890. source arch/arm/mm/Kconfig
  891. config ARM_NR_BANKS
  892. int
  893. default 16 if ARCH_EP93XX
  894. default 8
  895. config IWMMXT
  896. bool "Enable iWMMXt support"
  897. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  898. default y if PXA27x || PXA3xx || ARCH_MMP
  899. help
  900. Enable support for iWMMXt context switching at run time if
  901. running on a CPU that supports it.
  902. config XSCALE_PMU
  903. bool
  904. depends on CPU_XSCALE
  905. default y
  906. config MULTI_IRQ_HANDLER
  907. bool
  908. help
  909. Allow each machine to specify it's own IRQ handler at run time.
  910. if !MMU
  911. source "arch/arm/Kconfig-nommu"
  912. endif
  913. config ARM_ERRATA_326103
  914. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  915. depends on CPU_V6
  916. help
  917. Executing a SWP instruction to read-only memory does not set bit 11
  918. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  919. treat the access as a read, preventing a COW from occurring and
  920. causing the faulting task to livelock.
  921. config ARM_ERRATA_411920
  922. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  923. depends on CPU_V6 || CPU_V6K
  924. help
  925. Invalidation of the Instruction Cache operation can
  926. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  927. It does not affect the MPCore. This option enables the ARM Ltd.
  928. recommended workaround.
  929. config ARM_ERRATA_430973
  930. bool "ARM errata: Stale prediction on replaced interworking branch"
  931. depends on CPU_V7
  932. help
  933. This option enables the workaround for the 430973 Cortex-A8
  934. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  935. interworking branch is replaced with another code sequence at the
  936. same virtual address, whether due to self-modifying code or virtual
  937. to physical address re-mapping, Cortex-A8 does not recover from the
  938. stale interworking branch prediction. This results in Cortex-A8
  939. executing the new code sequence in the incorrect ARM or Thumb state.
  940. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  941. and also flushes the branch target cache at every context switch.
  942. Note that setting specific bits in the ACTLR register may not be
  943. available in non-secure mode.
  944. config ARM_ERRATA_458693
  945. bool "ARM errata: Processor deadlock when a false hazard is created"
  946. depends on CPU_V7
  947. depends on !ARCH_MULTIPLATFORM
  948. help
  949. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  950. erratum. For very specific sequences of memory operations, it is
  951. possible for a hazard condition intended for a cache line to instead
  952. be incorrectly associated with a different cache line. This false
  953. hazard might then cause a processor deadlock. The workaround enables
  954. the L1 caching of the NEON accesses and disables the PLD instruction
  955. in the ACTLR register. Note that setting specific bits in the ACTLR
  956. register may not be available in non-secure mode.
  957. config ARM_ERRATA_460075
  958. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  959. depends on CPU_V7
  960. depends on !ARCH_MULTIPLATFORM
  961. help
  962. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  963. erratum. Any asynchronous access to the L2 cache may encounter a
  964. situation in which recent store transactions to the L2 cache are lost
  965. and overwritten with stale memory contents from external memory. The
  966. workaround disables the write-allocate mode for the L2 cache via the
  967. ACTLR register. Note that setting specific bits in the ACTLR register
  968. may not be available in non-secure mode.
  969. config ARM_ERRATA_742230
  970. bool "ARM errata: DMB operation may be faulty"
  971. depends on CPU_V7 && SMP
  972. depends on !ARCH_MULTIPLATFORM
  973. help
  974. This option enables the workaround for the 742230 Cortex-A9
  975. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  976. between two write operations may not ensure the correct visibility
  977. ordering of the two writes. This workaround sets a specific bit in
  978. the diagnostic register of the Cortex-A9 which causes the DMB
  979. instruction to behave as a DSB, ensuring the correct behaviour of
  980. the two writes.
  981. config ARM_ERRATA_742231
  982. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  983. depends on CPU_V7 && SMP
  984. depends on !ARCH_MULTIPLATFORM
  985. help
  986. This option enables the workaround for the 742231 Cortex-A9
  987. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  988. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  989. accessing some data located in the same cache line, may get corrupted
  990. data due to bad handling of the address hazard when the line gets
  991. replaced from one of the CPUs at the same time as another CPU is
  992. accessing it. This workaround sets specific bits in the diagnostic
  993. register of the Cortex-A9 which reduces the linefill issuing
  994. capabilities of the processor.
  995. config PL310_ERRATA_588369
  996. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  997. depends on CACHE_L2X0
  998. help
  999. The PL310 L2 cache controller implements three types of Clean &
  1000. Invalidate maintenance operations: by Physical Address
  1001. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1002. They are architecturally defined to behave as the execution of a
  1003. clean operation followed immediately by an invalidate operation,
  1004. both performing to the same memory location. This functionality
  1005. is not correctly implemented in PL310 as clean lines are not
  1006. invalidated as a result of these operations.
  1007. config ARM_ERRATA_720789
  1008. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1009. depends on CPU_V7
  1010. help
  1011. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1012. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1013. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1014. As a consequence of this erratum, some TLB entries which should be
  1015. invalidated are not, resulting in an incoherency in the system page
  1016. tables. The workaround changes the TLB flushing routines to invalidate
  1017. entries regardless of the ASID.
  1018. config PL310_ERRATA_727915
  1019. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1020. depends on CACHE_L2X0
  1021. help
  1022. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1023. operation (offset 0x7FC). This operation runs in background so that
  1024. PL310 can handle normal accesses while it is in progress. Under very
  1025. rare circumstances, due to this erratum, write data can be lost when
  1026. PL310 treats a cacheable write transaction during a Clean &
  1027. Invalidate by Way operation.
  1028. config ARM_ERRATA_743622
  1029. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1030. depends on CPU_V7
  1031. depends on !ARCH_MULTIPLATFORM
  1032. help
  1033. This option enables the workaround for the 743622 Cortex-A9
  1034. (r2p*) erratum. Under very rare conditions, a faulty
  1035. optimisation in the Cortex-A9 Store Buffer may lead to data
  1036. corruption. This workaround sets a specific bit in the diagnostic
  1037. register of the Cortex-A9 which disables the Store Buffer
  1038. optimisation, preventing the defect from occurring. This has no
  1039. visible impact on the overall performance or power consumption of the
  1040. processor.
  1041. config ARM_ERRATA_751472
  1042. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1043. depends on CPU_V7
  1044. depends on !ARCH_MULTIPLATFORM
  1045. help
  1046. This option enables the workaround for the 751472 Cortex-A9 (prior
  1047. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1048. completion of a following broadcasted operation if the second
  1049. operation is received by a CPU before the ICIALLUIS has completed,
  1050. potentially leading to corrupted entries in the cache or TLB.
  1051. config PL310_ERRATA_753970
  1052. bool "PL310 errata: cache sync operation may be faulty"
  1053. depends on CACHE_PL310
  1054. help
  1055. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1056. Under some condition the effect of cache sync operation on
  1057. the store buffer still remains when the operation completes.
  1058. This means that the store buffer is always asked to drain and
  1059. this prevents it from merging any further writes. The workaround
  1060. is to replace the normal offset of cache sync operation (0x730)
  1061. by another offset targeting an unmapped PL310 register 0x740.
  1062. This has the same effect as the cache sync operation: store buffer
  1063. drain and waiting for all buffers empty.
  1064. config ARM_ERRATA_754322
  1065. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1066. depends on CPU_V7
  1067. help
  1068. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1069. r3p*) erratum. A speculative memory access may cause a page table walk
  1070. which starts prior to an ASID switch but completes afterwards. This
  1071. can populate the micro-TLB with a stale entry which may be hit with
  1072. the new ASID. This workaround places two dsb instructions in the mm
  1073. switching code so that no page table walks can cross the ASID switch.
  1074. config ARM_ERRATA_754327
  1075. bool "ARM errata: no automatic Store Buffer drain"
  1076. depends on CPU_V7 && SMP
  1077. help
  1078. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1079. r2p0) erratum. The Store Buffer does not have any automatic draining
  1080. mechanism and therefore a livelock may occur if an external agent
  1081. continuously polls a memory location waiting to observe an update.
  1082. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1083. written polling loops from denying visibility of updates to memory.
  1084. config ARM_ERRATA_364296
  1085. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1086. depends on CPU_V6 && !SMP
  1087. help
  1088. This options enables the workaround for the 364296 ARM1136
  1089. r0p2 erratum (possible cache data corruption with
  1090. hit-under-miss enabled). It sets the undocumented bit 31 in
  1091. the auxiliary control register and the FI bit in the control
  1092. register, thus disabling hit-under-miss without putting the
  1093. processor into full low interrupt latency mode. ARM11MPCore
  1094. is not affected.
  1095. config ARM_ERRATA_764369
  1096. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1097. depends on CPU_V7 && SMP
  1098. help
  1099. This option enables the workaround for erratum 764369
  1100. affecting Cortex-A9 MPCore with two or more processors (all
  1101. current revisions). Under certain timing circumstances, a data
  1102. cache line maintenance operation by MVA targeting an Inner
  1103. Shareable memory region may fail to proceed up to either the
  1104. Point of Coherency or to the Point of Unification of the
  1105. system. This workaround adds a DSB instruction before the
  1106. relevant cache maintenance functions and sets a specific bit
  1107. in the diagnostic control register of the SCU.
  1108. config PL310_ERRATA_769419
  1109. bool "PL310 errata: no automatic Store Buffer drain"
  1110. depends on CACHE_L2X0
  1111. help
  1112. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1113. not automatically drain. This can cause normal, non-cacheable
  1114. writes to be retained when the memory system is idle, leading
  1115. to suboptimal I/O performance for drivers using coherent DMA.
  1116. This option adds a write barrier to the cpu_idle loop so that,
  1117. on systems with an outer cache, the store buffer is drained
  1118. explicitly.
  1119. config ARM_ERRATA_775420
  1120. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1121. depends on CPU_V7
  1122. help
  1123. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1124. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1125. operation aborts with MMU exception, it might cause the processor
  1126. to deadlock. This workaround puts DSB before executing ISB if
  1127. an abort may occur on cache maintenance.
  1128. endmenu
  1129. source "arch/arm/common/Kconfig"
  1130. menu "Bus support"
  1131. config ARM_AMBA
  1132. bool
  1133. config ISA
  1134. bool
  1135. help
  1136. Find out whether you have ISA slots on your motherboard. ISA is the
  1137. name of a bus system, i.e. the way the CPU talks to the other stuff
  1138. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1139. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1140. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1141. # Select ISA DMA controller support
  1142. config ISA_DMA
  1143. bool
  1144. select ISA_DMA_API
  1145. # Select ISA DMA interface
  1146. config ISA_DMA_API
  1147. bool
  1148. config PCI
  1149. bool "PCI support" if MIGHT_HAVE_PCI
  1150. help
  1151. Find out whether you have a PCI motherboard. PCI is the name of a
  1152. bus system, i.e. the way the CPU talks to the other stuff inside
  1153. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1154. VESA. If you have PCI, say Y, otherwise N.
  1155. config PCI_DOMAINS
  1156. bool
  1157. depends on PCI
  1158. config PCI_NANOENGINE
  1159. bool "BSE nanoEngine PCI support"
  1160. depends on SA1100_NANOENGINE
  1161. help
  1162. Enable PCI on the BSE nanoEngine board.
  1163. config PCI_SYSCALL
  1164. def_bool PCI
  1165. # Select the host bridge type
  1166. config PCI_HOST_VIA82C505
  1167. bool
  1168. depends on PCI && ARCH_SHARK
  1169. default y
  1170. config PCI_HOST_ITE8152
  1171. bool
  1172. depends on PCI && MACH_ARMCORE
  1173. default y
  1174. select DMABOUNCE
  1175. source "drivers/pci/Kconfig"
  1176. source "drivers/pcmcia/Kconfig"
  1177. endmenu
  1178. menu "Kernel Features"
  1179. config HAVE_SMP
  1180. bool
  1181. help
  1182. This option should be selected by machines which have an SMP-
  1183. capable CPU.
  1184. The only effect of this option is to make the SMP-related
  1185. options available to the user for configuration.
  1186. config SMP
  1187. bool "Symmetric Multi-Processing"
  1188. depends on CPU_V6K || CPU_V7
  1189. depends on GENERIC_CLOCKEVENTS
  1190. depends on HAVE_SMP
  1191. depends on MMU
  1192. select USE_GENERIC_SMP_HELPERS
  1193. help
  1194. This enables support for systems with more than one CPU. If you have
  1195. a system with only one CPU, like most personal computers, say N. If
  1196. you have a system with more than one CPU, say Y.
  1197. If you say N here, the kernel will run on single and multiprocessor
  1198. machines, but will use only one CPU of a multiprocessor machine. If
  1199. you say Y here, the kernel will run on many, but not all, single
  1200. processor machines. On a single processor machine, the kernel will
  1201. run faster if you say N here.
  1202. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1203. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1204. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1205. If you don't know what to do here, say N.
  1206. config SMP_ON_UP
  1207. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1208. depends on SMP && !XIP_KERNEL
  1209. default y
  1210. help
  1211. SMP kernels contain instructions which fail on non-SMP processors.
  1212. Enabling this option allows the kernel to modify itself to make
  1213. these instructions safe. Disabling it allows about 1K of space
  1214. savings.
  1215. If you don't know what to do here, say Y.
  1216. config ARM_CPU_TOPOLOGY
  1217. bool "Support cpu topology definition"
  1218. depends on SMP && CPU_V7
  1219. default y
  1220. help
  1221. Support ARM cpu topology definition. The MPIDR register defines
  1222. affinity between processors which is then used to describe the cpu
  1223. topology of an ARM System.
  1224. config SCHED_MC
  1225. bool "Multi-core scheduler support"
  1226. depends on ARM_CPU_TOPOLOGY
  1227. help
  1228. Multi-core scheduler support improves the CPU scheduler's decision
  1229. making when dealing with multi-core CPU chips at a cost of slightly
  1230. increased overhead in some places. If unsure say N here.
  1231. config SCHED_SMT
  1232. bool "SMT scheduler support"
  1233. depends on ARM_CPU_TOPOLOGY
  1234. help
  1235. Improves the CPU scheduler's decision making when dealing with
  1236. MultiThreading at a cost of slightly increased overhead in some
  1237. places. If unsure say N here.
  1238. config HAVE_ARM_SCU
  1239. bool
  1240. help
  1241. This option enables support for the ARM system coherency unit
  1242. config HAVE_ARM_ARCH_TIMER
  1243. bool "Architected timer support"
  1244. depends on CPU_V7
  1245. select ARM_ARCH_TIMER
  1246. help
  1247. This option enables support for the ARM architected timer
  1248. config HAVE_ARM_TWD
  1249. bool
  1250. depends on SMP
  1251. select CLKSRC_OF if OF
  1252. help
  1253. This options enables support for the ARM timer and watchdog unit
  1254. choice
  1255. prompt "Memory split"
  1256. default VMSPLIT_3G
  1257. help
  1258. Select the desired split between kernel and user memory.
  1259. If you are not absolutely sure what you are doing, leave this
  1260. option alone!
  1261. config VMSPLIT_3G
  1262. bool "3G/1G user/kernel split"
  1263. config VMSPLIT_2G
  1264. bool "2G/2G user/kernel split"
  1265. config VMSPLIT_1G
  1266. bool "1G/3G user/kernel split"
  1267. endchoice
  1268. config PAGE_OFFSET
  1269. hex
  1270. default 0x40000000 if VMSPLIT_1G
  1271. default 0x80000000 if VMSPLIT_2G
  1272. default 0xC0000000
  1273. config NR_CPUS
  1274. int "Maximum number of CPUs (2-32)"
  1275. range 2 32
  1276. depends on SMP
  1277. default "4"
  1278. config HOTPLUG_CPU
  1279. bool "Support for hot-pluggable CPUs"
  1280. depends on SMP && HOTPLUG
  1281. help
  1282. Say Y here to experiment with turning CPUs off and on. CPUs
  1283. can be controlled through /sys/devices/system/cpu.
  1284. config ARM_PSCI
  1285. bool "Support for the ARM Power State Coordination Interface (PSCI)"
  1286. depends on CPU_V7
  1287. help
  1288. Say Y here if you want Linux to communicate with system firmware
  1289. implementing the PSCI specification for CPU-centric power
  1290. management operations described in ARM document number ARM DEN
  1291. 0022A ("Power State Coordination Interface System Software on
  1292. ARM processors").
  1293. config LOCAL_TIMERS
  1294. bool "Use local timer interrupts"
  1295. depends on SMP
  1296. default y
  1297. help
  1298. Enable support for local timers on SMP platforms, rather then the
  1299. legacy IPI broadcast method. Local timers allows the system
  1300. accounting to be spread across the timer interval, preventing a
  1301. "thundering herd" at every timer tick.
  1302. # The GPIO number here must be sorted by descending number. In case of
  1303. # a multiplatform kernel, we just want the highest value required by the
  1304. # selected platforms.
  1305. config ARCH_NR_GPIO
  1306. int
  1307. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1308. default 512 if SOC_OMAP5
  1309. default 355 if ARCH_U8500
  1310. default 288 if ARCH_VT8500 || ARCH_SUNXI
  1311. default 264 if MACH_H4700
  1312. default 0
  1313. help
  1314. Maximum number of GPIOs in the system.
  1315. If unsure, leave the default value.
  1316. source kernel/Kconfig.preempt
  1317. config HZ
  1318. int
  1319. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1320. ARCH_S5PV210 || ARCH_EXYNOS4
  1321. default AT91_TIMER_HZ if ARCH_AT91
  1322. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1323. default 100
  1324. config SCHED_HRTICK
  1325. def_bool HIGH_RES_TIMERS
  1326. config THUMB2_KERNEL
  1327. bool "Compile the kernel in Thumb-2 mode"
  1328. depends on CPU_V7 && !CPU_V6 && !CPU_V6K
  1329. select AEABI
  1330. select ARM_ASM_UNIFIED
  1331. select ARM_UNWIND
  1332. help
  1333. By enabling this option, the kernel will be compiled in
  1334. Thumb-2 mode. A compiler/assembler that understand the unified
  1335. ARM-Thumb syntax is needed.
  1336. If unsure, say N.
  1337. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1338. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1339. depends on THUMB2_KERNEL && MODULES
  1340. default y
  1341. help
  1342. Various binutils versions can resolve Thumb-2 branches to
  1343. locally-defined, preemptible global symbols as short-range "b.n"
  1344. branch instructions.
  1345. This is a problem, because there's no guarantee the final
  1346. destination of the symbol, or any candidate locations for a
  1347. trampoline, are within range of the branch. For this reason, the
  1348. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1349. relocation in modules at all, and it makes little sense to add
  1350. support.
  1351. The symptom is that the kernel fails with an "unsupported
  1352. relocation" error when loading some modules.
  1353. Until fixed tools are available, passing
  1354. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1355. code which hits this problem, at the cost of a bit of extra runtime
  1356. stack usage in some cases.
  1357. The problem is described in more detail at:
  1358. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1359. Only Thumb-2 kernels are affected.
  1360. Unless you are sure your tools don't have this problem, say Y.
  1361. config ARM_ASM_UNIFIED
  1362. bool
  1363. config AEABI
  1364. bool "Use the ARM EABI to compile the kernel"
  1365. help
  1366. This option allows for the kernel to be compiled using the latest
  1367. ARM ABI (aka EABI). This is only useful if you are using a user
  1368. space environment that is also compiled with EABI.
  1369. Since there are major incompatibilities between the legacy ABI and
  1370. EABI, especially with regard to structure member alignment, this
  1371. option also changes the kernel syscall calling convention to
  1372. disambiguate both ABIs and allow for backward compatibility support
  1373. (selected with CONFIG_OABI_COMPAT).
  1374. To use this you need GCC version 4.0.0 or later.
  1375. config OABI_COMPAT
  1376. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1377. depends on AEABI && !THUMB2_KERNEL
  1378. default y
  1379. help
  1380. This option preserves the old syscall interface along with the
  1381. new (ARM EABI) one. It also provides a compatibility layer to
  1382. intercept syscalls that have structure arguments which layout
  1383. in memory differs between the legacy ABI and the new ARM EABI
  1384. (only for non "thumb" binaries). This option adds a tiny
  1385. overhead to all syscalls and produces a slightly larger kernel.
  1386. If you know you'll be using only pure EABI user space then you
  1387. can say N here. If this option is not selected and you attempt
  1388. to execute a legacy ABI binary then the result will be
  1389. UNPREDICTABLE (in fact it can be predicted that it won't work
  1390. at all). If in doubt say Y.
  1391. config ARCH_HAS_HOLES_MEMORYMODEL
  1392. bool
  1393. config ARCH_SPARSEMEM_ENABLE
  1394. bool
  1395. config ARCH_SPARSEMEM_DEFAULT
  1396. def_bool ARCH_SPARSEMEM_ENABLE
  1397. config ARCH_SELECT_MEMORY_MODEL
  1398. def_bool ARCH_SPARSEMEM_ENABLE
  1399. config HAVE_ARCH_PFN_VALID
  1400. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1401. config HIGHMEM
  1402. bool "High Memory Support"
  1403. depends on MMU
  1404. help
  1405. The address space of ARM processors is only 4 Gigabytes large
  1406. and it has to accommodate user address space, kernel address
  1407. space as well as some memory mapped IO. That means that, if you
  1408. have a large amount of physical memory and/or IO, not all of the
  1409. memory can be "permanently mapped" by the kernel. The physical
  1410. memory that is not permanently mapped is called "high memory".
  1411. Depending on the selected kernel/user memory split, minimum
  1412. vmalloc space and actual amount of RAM, you may not need this
  1413. option which should result in a slightly faster kernel.
  1414. If unsure, say n.
  1415. config HIGHPTE
  1416. bool "Allocate 2nd-level pagetables from highmem"
  1417. depends on HIGHMEM
  1418. config HW_PERF_EVENTS
  1419. bool "Enable hardware performance counter support for perf events"
  1420. depends on PERF_EVENTS
  1421. default y
  1422. help
  1423. Enable hardware performance counter support for perf events. If
  1424. disabled, perf events will use software events only.
  1425. source "mm/Kconfig"
  1426. config FORCE_MAX_ZONEORDER
  1427. int "Maximum zone order" if ARCH_SHMOBILE
  1428. range 11 64 if ARCH_SHMOBILE
  1429. default "12" if SOC_AM33XX
  1430. default "9" if SA1111
  1431. default "11"
  1432. help
  1433. The kernel memory allocator divides physically contiguous memory
  1434. blocks into "zones", where each zone is a power of two number of
  1435. pages. This option selects the largest power of two that the kernel
  1436. keeps in the memory allocator. If you need to allocate very large
  1437. blocks of physically contiguous memory, then you may need to
  1438. increase this value.
  1439. This config option is actually maximum order plus one. For example,
  1440. a value of 11 means that the largest free memory block is 2^10 pages.
  1441. config ALIGNMENT_TRAP
  1442. bool
  1443. depends on CPU_CP15_MMU
  1444. default y if !ARCH_EBSA110
  1445. select HAVE_PROC_CPU if PROC_FS
  1446. help
  1447. ARM processors cannot fetch/store information which is not
  1448. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1449. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1450. fetch/store instructions will be emulated in software if you say
  1451. here, which has a severe performance impact. This is necessary for
  1452. correct operation of some network protocols. With an IP-only
  1453. configuration it is safe to say N, otherwise say Y.
  1454. config UACCESS_WITH_MEMCPY
  1455. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1456. depends on MMU
  1457. default y if CPU_FEROCEON
  1458. help
  1459. Implement faster copy_to_user and clear_user methods for CPU
  1460. cores where a 8-word STM instruction give significantly higher
  1461. memory write throughput than a sequence of individual 32bit stores.
  1462. A possible side effect is a slight increase in scheduling latency
  1463. between threads sharing the same address space if they invoke
  1464. such copy operations with large buffers.
  1465. However, if the CPU data cache is using a write-allocate mode,
  1466. this option is unlikely to provide any performance gain.
  1467. config SECCOMP
  1468. bool
  1469. prompt "Enable seccomp to safely compute untrusted bytecode"
  1470. ---help---
  1471. This kernel feature is useful for number crunching applications
  1472. that may need to compute untrusted bytecode during their
  1473. execution. By using pipes or other transports made available to
  1474. the process as file descriptors supporting the read/write
  1475. syscalls, it's possible to isolate those applications in
  1476. their own address space using seccomp. Once seccomp is
  1477. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1478. and the task is only allowed to execute a few safe syscalls
  1479. defined by each seccomp mode.
  1480. config CC_STACKPROTECTOR
  1481. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1482. help
  1483. This option turns on the -fstack-protector GCC feature. This
  1484. feature puts, at the beginning of functions, a canary value on
  1485. the stack just before the return address, and validates
  1486. the value just before actually returning. Stack based buffer
  1487. overflows (that need to overwrite this return address) now also
  1488. overwrite the canary, which gets detected and the attack is then
  1489. neutralized via a kernel panic.
  1490. This feature requires gcc version 4.2 or above.
  1491. config XEN_DOM0
  1492. def_bool y
  1493. depends on XEN
  1494. config XEN
  1495. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1496. depends on ARM && AEABI && OF
  1497. depends on CPU_V7 && !CPU_V6
  1498. depends on !GENERIC_ATOMIC64
  1499. help
  1500. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1501. endmenu
  1502. menu "Boot options"
  1503. config USE_OF
  1504. bool "Flattened Device Tree support"
  1505. select IRQ_DOMAIN
  1506. select OF
  1507. select OF_EARLY_FLATTREE
  1508. help
  1509. Include support for flattened device tree machine descriptions.
  1510. config ATAGS
  1511. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1512. default y
  1513. help
  1514. This is the traditional way of passing data to the kernel at boot
  1515. time. If you are solely relying on the flattened device tree (or
  1516. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1517. to remove ATAGS support from your kernel binary. If unsure,
  1518. leave this to y.
  1519. config DEPRECATED_PARAM_STRUCT
  1520. bool "Provide old way to pass kernel parameters"
  1521. depends on ATAGS
  1522. help
  1523. This was deprecated in 2001 and announced to live on for 5 years.
  1524. Some old boot loaders still use this way.
  1525. # Compressed boot loader in ROM. Yes, we really want to ask about
  1526. # TEXT and BSS so we preserve their values in the config files.
  1527. config ZBOOT_ROM_TEXT
  1528. hex "Compressed ROM boot loader base address"
  1529. default "0"
  1530. help
  1531. The physical address at which the ROM-able zImage is to be
  1532. placed in the target. Platforms which normally make use of
  1533. ROM-able zImage formats normally set this to a suitable
  1534. value in their defconfig file.
  1535. If ZBOOT_ROM is not enabled, this has no effect.
  1536. config ZBOOT_ROM_BSS
  1537. hex "Compressed ROM boot loader BSS address"
  1538. default "0"
  1539. help
  1540. The base address of an area of read/write memory in the target
  1541. for the ROM-able zImage which must be available while the
  1542. decompressor is running. It must be large enough to hold the
  1543. entire decompressed kernel plus an additional 128 KiB.
  1544. Platforms which normally make use of ROM-able zImage formats
  1545. normally set this to a suitable value in their defconfig file.
  1546. If ZBOOT_ROM is not enabled, this has no effect.
  1547. config ZBOOT_ROM
  1548. bool "Compressed boot loader in ROM/flash"
  1549. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1550. help
  1551. Say Y here if you intend to execute your compressed kernel image
  1552. (zImage) directly from ROM or flash. If unsure, say N.
  1553. choice
  1554. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1555. depends on ZBOOT_ROM && ARCH_SH7372
  1556. default ZBOOT_ROM_NONE
  1557. help
  1558. Include experimental SD/MMC loading code in the ROM-able zImage.
  1559. With this enabled it is possible to write the ROM-able zImage
  1560. kernel image to an MMC or SD card and boot the kernel straight
  1561. from the reset vector. At reset the processor Mask ROM will load
  1562. the first part of the ROM-able zImage which in turn loads the
  1563. rest the kernel image to RAM.
  1564. config ZBOOT_ROM_NONE
  1565. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1566. help
  1567. Do not load image from SD or MMC
  1568. config ZBOOT_ROM_MMCIF
  1569. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1570. help
  1571. Load image from MMCIF hardware block.
  1572. config ZBOOT_ROM_SH_MOBILE_SDHI
  1573. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1574. help
  1575. Load image from SDHI hardware block
  1576. endchoice
  1577. config ARM_APPENDED_DTB
  1578. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1579. depends on OF && !ZBOOT_ROM
  1580. help
  1581. With this option, the boot code will look for a device tree binary
  1582. (DTB) appended to zImage
  1583. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1584. This is meant as a backward compatibility convenience for those
  1585. systems with a bootloader that can't be upgraded to accommodate
  1586. the documented boot protocol using a device tree.
  1587. Beware that there is very little in terms of protection against
  1588. this option being confused by leftover garbage in memory that might
  1589. look like a DTB header after a reboot if no actual DTB is appended
  1590. to zImage. Do not leave this option active in a production kernel
  1591. if you don't intend to always append a DTB. Proper passing of the
  1592. location into r2 of a bootloader provided DTB is always preferable
  1593. to this option.
  1594. config ARM_ATAG_DTB_COMPAT
  1595. bool "Supplement the appended DTB with traditional ATAG information"
  1596. depends on ARM_APPENDED_DTB
  1597. help
  1598. Some old bootloaders can't be updated to a DTB capable one, yet
  1599. they provide ATAGs with memory configuration, the ramdisk address,
  1600. the kernel cmdline string, etc. Such information is dynamically
  1601. provided by the bootloader and can't always be stored in a static
  1602. DTB. To allow a device tree enabled kernel to be used with such
  1603. bootloaders, this option allows zImage to extract the information
  1604. from the ATAG list and store it at run time into the appended DTB.
  1605. choice
  1606. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1607. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1608. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1609. bool "Use bootloader kernel arguments if available"
  1610. help
  1611. Uses the command-line options passed by the boot loader instead of
  1612. the device tree bootargs property. If the boot loader doesn't provide
  1613. any, the device tree bootargs property will be used.
  1614. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1615. bool "Extend with bootloader kernel arguments"
  1616. help
  1617. The command-line arguments provided by the boot loader will be
  1618. appended to the the device tree bootargs property.
  1619. endchoice
  1620. config CMDLINE
  1621. string "Default kernel command string"
  1622. default ""
  1623. help
  1624. On some architectures (EBSA110 and CATS), there is currently no way
  1625. for the boot loader to pass arguments to the kernel. For these
  1626. architectures, you should supply some command-line options at build
  1627. time by entering them here. As a minimum, you should specify the
  1628. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1629. choice
  1630. prompt "Kernel command line type" if CMDLINE != ""
  1631. default CMDLINE_FROM_BOOTLOADER
  1632. depends on ATAGS
  1633. config CMDLINE_FROM_BOOTLOADER
  1634. bool "Use bootloader kernel arguments if available"
  1635. help
  1636. Uses the command-line options passed by the boot loader. If
  1637. the boot loader doesn't provide any, the default kernel command
  1638. string provided in CMDLINE will be used.
  1639. config CMDLINE_EXTEND
  1640. bool "Extend bootloader kernel arguments"
  1641. help
  1642. The command-line arguments provided by the boot loader will be
  1643. appended to the default kernel command string.
  1644. config CMDLINE_FORCE
  1645. bool "Always use the default kernel command string"
  1646. help
  1647. Always use the default kernel command string, even if the boot
  1648. loader passes other arguments to the kernel.
  1649. This is useful if you cannot or don't want to change the
  1650. command-line options your boot loader passes to the kernel.
  1651. endchoice
  1652. config XIP_KERNEL
  1653. bool "Kernel Execute-In-Place from ROM"
  1654. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1655. help
  1656. Execute-In-Place allows the kernel to run from non-volatile storage
  1657. directly addressable by the CPU, such as NOR flash. This saves RAM
  1658. space since the text section of the kernel is not loaded from flash
  1659. to RAM. Read-write sections, such as the data section and stack,
  1660. are still copied to RAM. The XIP kernel is not compressed since
  1661. it has to run directly from flash, so it will take more space to
  1662. store it. The flash address used to link the kernel object files,
  1663. and for storing it, is configuration dependent. Therefore, if you
  1664. say Y here, you must know the proper physical address where to
  1665. store the kernel image depending on your own flash memory usage.
  1666. Also note that the make target becomes "make xipImage" rather than
  1667. "make zImage" or "make Image". The final kernel binary to put in
  1668. ROM memory will be arch/arm/boot/xipImage.
  1669. If unsure, say N.
  1670. config XIP_PHYS_ADDR
  1671. hex "XIP Kernel Physical Location"
  1672. depends on XIP_KERNEL
  1673. default "0x00080000"
  1674. help
  1675. This is the physical address in your flash memory the kernel will
  1676. be linked for and stored to. This address is dependent on your
  1677. own flash usage.
  1678. config KEXEC
  1679. bool "Kexec system call (EXPERIMENTAL)"
  1680. depends on (!SMP || HOTPLUG_CPU)
  1681. help
  1682. kexec is a system call that implements the ability to shutdown your
  1683. current kernel, and to start another kernel. It is like a reboot
  1684. but it is independent of the system firmware. And like a reboot
  1685. you can start any kernel with it, not just Linux.
  1686. It is an ongoing process to be certain the hardware in a machine
  1687. is properly shutdown, so do not be surprised if this code does not
  1688. initially work for you. It may help to enable device hotplugging
  1689. support.
  1690. config ATAGS_PROC
  1691. bool "Export atags in procfs"
  1692. depends on ATAGS && KEXEC
  1693. default y
  1694. help
  1695. Should the atags used to boot the kernel be exported in an "atags"
  1696. file in procfs. Useful with kexec.
  1697. config CRASH_DUMP
  1698. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1699. help
  1700. Generate crash dump after being started by kexec. This should
  1701. be normally only set in special crash dump kernels which are
  1702. loaded in the main kernel with kexec-tools into a specially
  1703. reserved region and then later executed after a crash by
  1704. kdump/kexec. The crash dump kernel must be compiled to a
  1705. memory address not used by the main kernel
  1706. For more details see Documentation/kdump/kdump.txt
  1707. config AUTO_ZRELADDR
  1708. bool "Auto calculation of the decompressed kernel image address"
  1709. depends on !ZBOOT_ROM && !ARCH_U300
  1710. help
  1711. ZRELADDR is the physical address where the decompressed kernel
  1712. image will be placed. If AUTO_ZRELADDR is selected, the address
  1713. will be determined at run-time by masking the current IP with
  1714. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1715. from start of memory.
  1716. endmenu
  1717. menu "CPU Power Management"
  1718. if ARCH_HAS_CPUFREQ
  1719. source "drivers/cpufreq/Kconfig"
  1720. config CPU_FREQ_IMX
  1721. tristate "CPUfreq driver for i.MX CPUs"
  1722. depends on ARCH_MXC && CPU_FREQ
  1723. select CPU_FREQ_TABLE
  1724. help
  1725. This enables the CPUfreq driver for i.MX CPUs.
  1726. config CPU_FREQ_SA1100
  1727. bool
  1728. config CPU_FREQ_SA1110
  1729. bool
  1730. config CPU_FREQ_INTEGRATOR
  1731. tristate "CPUfreq driver for ARM Integrator CPUs"
  1732. depends on ARCH_INTEGRATOR && CPU_FREQ
  1733. default y
  1734. help
  1735. This enables the CPUfreq driver for ARM Integrator CPUs.
  1736. For details, take a look at <file:Documentation/cpu-freq>.
  1737. If in doubt, say Y.
  1738. config CPU_FREQ_PXA
  1739. bool
  1740. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1741. default y
  1742. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1743. select CPU_FREQ_TABLE
  1744. config CPU_FREQ_S3C
  1745. bool
  1746. help
  1747. Internal configuration node for common cpufreq on Samsung SoC
  1748. config CPU_FREQ_S3C24XX
  1749. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1750. depends on ARCH_S3C24XX && CPU_FREQ
  1751. select CPU_FREQ_S3C
  1752. help
  1753. This enables the CPUfreq driver for the Samsung S3C24XX family
  1754. of CPUs.
  1755. For details, take a look at <file:Documentation/cpu-freq>.
  1756. If in doubt, say N.
  1757. config CPU_FREQ_S3C24XX_PLL
  1758. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1759. depends on CPU_FREQ_S3C24XX
  1760. help
  1761. Compile in support for changing the PLL frequency from the
  1762. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1763. after a frequency change, so by default it is not enabled.
  1764. This also means that the PLL tables for the selected CPU(s) will
  1765. be built which may increase the size of the kernel image.
  1766. config CPU_FREQ_S3C24XX_DEBUG
  1767. bool "Debug CPUfreq Samsung driver core"
  1768. depends on CPU_FREQ_S3C24XX
  1769. help
  1770. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1771. config CPU_FREQ_S3C24XX_IODEBUG
  1772. bool "Debug CPUfreq Samsung driver IO timing"
  1773. depends on CPU_FREQ_S3C24XX
  1774. help
  1775. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1776. config CPU_FREQ_S3C24XX_DEBUGFS
  1777. bool "Export debugfs for CPUFreq"
  1778. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1779. help
  1780. Export status information via debugfs.
  1781. endif
  1782. source "drivers/cpuidle/Kconfig"
  1783. endmenu
  1784. menu "Floating point emulation"
  1785. comment "At least one emulation must be selected"
  1786. config FPE_NWFPE
  1787. bool "NWFPE math emulation"
  1788. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1789. ---help---
  1790. Say Y to include the NWFPE floating point emulator in the kernel.
  1791. This is necessary to run most binaries. Linux does not currently
  1792. support floating point hardware so you need to say Y here even if
  1793. your machine has an FPA or floating point co-processor podule.
  1794. You may say N here if you are going to load the Acorn FPEmulator
  1795. early in the bootup.
  1796. config FPE_NWFPE_XP
  1797. bool "Support extended precision"
  1798. depends on FPE_NWFPE
  1799. help
  1800. Say Y to include 80-bit support in the kernel floating-point
  1801. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1802. Note that gcc does not generate 80-bit operations by default,
  1803. so in most cases this option only enlarges the size of the
  1804. floating point emulator without any good reason.
  1805. You almost surely want to say N here.
  1806. config FPE_FASTFPE
  1807. bool "FastFPE math emulation (EXPERIMENTAL)"
  1808. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
  1809. ---help---
  1810. Say Y here to include the FAST floating point emulator in the kernel.
  1811. This is an experimental much faster emulator which now also has full
  1812. precision for the mantissa. It does not support any exceptions.
  1813. It is very simple, and approximately 3-6 times faster than NWFPE.
  1814. It should be sufficient for most programs. It may be not suitable
  1815. for scientific calculations, but you have to check this for yourself.
  1816. If you do not feel you need a faster FP emulation you should better
  1817. choose NWFPE.
  1818. config VFP
  1819. bool "VFP-format floating point maths"
  1820. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1821. help
  1822. Say Y to include VFP support code in the kernel. This is needed
  1823. if your hardware includes a VFP unit.
  1824. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1825. release notes and additional status information.
  1826. Say N if your target does not have VFP hardware.
  1827. config VFPv3
  1828. bool
  1829. depends on VFP
  1830. default y if CPU_V7
  1831. config NEON
  1832. bool "Advanced SIMD (NEON) Extension support"
  1833. depends on VFPv3 && CPU_V7
  1834. help
  1835. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1836. Extension.
  1837. endmenu
  1838. menu "Userspace binary formats"
  1839. source "fs/Kconfig.binfmt"
  1840. config ARTHUR
  1841. tristate "RISC OS personality"
  1842. depends on !AEABI
  1843. help
  1844. Say Y here to include the kernel code necessary if you want to run
  1845. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1846. experimental; if this sounds frightening, say N and sleep in peace.
  1847. You can also say M here to compile this support as a module (which
  1848. will be called arthur).
  1849. endmenu
  1850. menu "Power management options"
  1851. source "kernel/power/Kconfig"
  1852. config ARCH_SUSPEND_POSSIBLE
  1853. depends on !ARCH_S5PC100
  1854. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1855. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1856. def_bool y
  1857. config ARM_CPU_SUSPEND
  1858. def_bool PM_SLEEP
  1859. endmenu
  1860. source "net/Kconfig"
  1861. source "drivers/Kconfig"
  1862. source "fs/Kconfig"
  1863. source "arch/arm/Kconfig.debug"
  1864. source "security/Kconfig"
  1865. source "crypto/Kconfig"
  1866. source "lib/Kconfig"
  1867. source "arch/arm/kvm/Kconfig"