Kconfig 65 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361136213631364136513661367136813691370137113721373137413751376137713781379138013811382138313841385138613871388138913901391139213931394139513961397139813991400140114021403140414051406140714081409141014111412141314141415141614171418141914201421142214231424142514261427142814291430143114321433143414351436143714381439144014411442144314441445144614471448144914501451145214531454145514561457145814591460146114621463146414651466146714681469147014711472147314741475147614771478147914801481148214831484148514861487148814891490149114921493149414951496149714981499150015011502150315041505150615071508150915101511151215131514151515161517151815191520152115221523152415251526152715281529153015311532153315341535153615371538153915401541154215431544154515461547154815491550155115521553155415551556155715581559156015611562156315641565156615671568156915701571157215731574157515761577157815791580158115821583158415851586158715881589159015911592159315941595159615971598159916001601160216031604160516061607160816091610161116121613161416151616161716181619162016211622162316241625162616271628162916301631163216331634163516361637163816391640164116421643164416451646164716481649165016511652165316541655165616571658165916601661166216631664166516661667166816691670167116721673167416751676167716781679168016811682168316841685168616871688168916901691169216931694169516961697169816991700170117021703170417051706170717081709171017111712171317141715171617171718171917201721172217231724172517261727172817291730173117321733173417351736173717381739174017411742174317441745174617471748174917501751175217531754175517561757175817591760176117621763176417651766176717681769177017711772177317741775177617771778177917801781178217831784178517861787178817891790179117921793179417951796179717981799180018011802180318041805180618071808180918101811181218131814181518161817181818191820182118221823182418251826182718281829183018311832183318341835183618371838183918401841184218431844184518461847184818491850185118521853185418551856185718581859186018611862186318641865186618671868186918701871187218731874187518761877187818791880188118821883188418851886188718881889189018911892189318941895189618971898189919001901190219031904190519061907190819091910191119121913191419151916191719181919192019211922192319241925192619271928192919301931193219331934193519361937193819391940194119421943194419451946194719481949195019511952195319541955195619571958195919601961196219631964196519661967196819691970197119721973197419751976197719781979198019811982198319841985198619871988198919901991199219931994199519961997199819992000200120022003200420052006200720082009201020112012201320142015201620172018201920202021202220232024202520262027202820292030203120322033203420352036203720382039204020412042204320442045204620472048204920502051205220532054205520562057205820592060206120622063206420652066206720682069207020712072207320742075207620772078207920802081208220832084208520862087208820892090209120922093209420952096209720982099210021012102210321042105210621072108210921102111211221132114211521162117211821192120212121222123212421252126212721282129213021312132213321342135213621372138213921402141214221432144214521462147214821492150215121522153215421552156215721582159216021612162216321642165216621672168216921702171217221732174217521762177217821792180218121822183218421852186218721882189219021912192219321942195219621972198219922002201220222032204220522062207220822092210221122122213221422152216221722182219222022212222222322242225222622272228222922302231223222332234223522362237223822392240224122422243224422452246224722482249225022512252225322542255225622572258225922602261226222632264226522662267226822692270227122722273227422752276227722782279
  1. config ARM
  2. bool
  3. default y
  4. select HAVE_AOUT
  5. select HAVE_DMA_API_DEBUG
  6. select HAVE_IDE if PCI || ISA || PCMCIA
  7. select HAVE_MEMBLOCK
  8. select RTC_LIB
  9. select SYS_SUPPORTS_APM_EMULATION
  10. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  11. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  12. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  13. select HAVE_ARCH_KGDB
  14. select HAVE_KPROBES if !XIP_KERNEL
  15. select HAVE_KRETPROBES if (HAVE_KPROBES)
  16. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  17. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  18. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  19. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  20. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  21. select HAVE_GENERIC_DMA_COHERENT
  22. select HAVE_KERNEL_GZIP
  23. select HAVE_KERNEL_LZO
  24. select HAVE_KERNEL_LZMA
  25. select HAVE_KERNEL_XZ
  26. select HAVE_IRQ_WORK
  27. select HAVE_PERF_EVENTS
  28. select PERF_USE_VMALLOC
  29. select HAVE_REGS_AND_STACK_ACCESS_API
  30. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  31. select HAVE_C_RECORDMCOUNT
  32. select HAVE_GENERIC_HARDIRQS
  33. select HAVE_SPARSE_IRQ
  34. select GENERIC_IRQ_SHOW
  35. select CPU_PM if (SUSPEND || CPU_IDLE)
  36. select GENERIC_PCI_IOMAP
  37. select HAVE_BPF_JIT
  38. help
  39. The ARM series is a line of low-power-consumption RISC chip designs
  40. licensed by ARM Ltd and targeted at embedded applications and
  41. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  42. manufactured, but legacy ARM-based PC hardware remains popular in
  43. Europe. There is an ARM Linux project with a web page at
  44. <http://www.arm.linux.org.uk/>.
  45. config ARM_HAS_SG_CHAIN
  46. bool
  47. config HAVE_PWM
  48. bool
  49. config MIGHT_HAVE_PCI
  50. bool
  51. config SYS_SUPPORTS_APM_EMULATION
  52. bool
  53. config HAVE_SCHED_CLOCK
  54. bool
  55. config GENERIC_GPIO
  56. bool
  57. config ARCH_USES_GETTIMEOFFSET
  58. bool
  59. default n
  60. config GENERIC_CLOCKEVENTS
  61. bool
  62. config GENERIC_CLOCKEVENTS_BROADCAST
  63. bool
  64. depends on GENERIC_CLOCKEVENTS
  65. default y if SMP
  66. config KTIME_SCALAR
  67. bool
  68. default y
  69. config HAVE_TCM
  70. bool
  71. select GENERIC_ALLOCATOR
  72. config HAVE_PROC_CPU
  73. bool
  74. config NO_IOPORT
  75. bool
  76. config EISA
  77. bool
  78. ---help---
  79. The Extended Industry Standard Architecture (EISA) bus was
  80. developed as an open alternative to the IBM MicroChannel bus.
  81. The EISA bus provided some of the features of the IBM MicroChannel
  82. bus while maintaining backward compatibility with cards made for
  83. the older ISA bus. The EISA bus saw limited use between 1988 and
  84. 1995 when it was made obsolete by the PCI bus.
  85. Say Y here if you are building a kernel for an EISA-based machine.
  86. Otherwise, say N.
  87. config SBUS
  88. bool
  89. config MCA
  90. bool
  91. help
  92. MicroChannel Architecture is found in some IBM PS/2 machines and
  93. laptops. It is a bus system similar to PCI or ISA. See
  94. <file:Documentation/mca.txt> (and especially the web page given
  95. there) before attempting to build an MCA bus kernel.
  96. config STACKTRACE_SUPPORT
  97. bool
  98. default y
  99. config HAVE_LATENCYTOP_SUPPORT
  100. bool
  101. depends on !SMP
  102. default y
  103. config LOCKDEP_SUPPORT
  104. bool
  105. default y
  106. config TRACE_IRQFLAGS_SUPPORT
  107. bool
  108. default y
  109. config HARDIRQS_SW_RESEND
  110. bool
  111. default y
  112. config GENERIC_IRQ_PROBE
  113. bool
  114. default y
  115. config GENERIC_LOCKBREAK
  116. bool
  117. default y
  118. depends on SMP && PREEMPT
  119. config RWSEM_GENERIC_SPINLOCK
  120. bool
  121. default y
  122. config RWSEM_XCHGADD_ALGORITHM
  123. bool
  124. config ARCH_HAS_ILOG2_U32
  125. bool
  126. config ARCH_HAS_ILOG2_U64
  127. bool
  128. config ARCH_HAS_CPUFREQ
  129. bool
  130. help
  131. Internal node to signify that the ARCH has CPUFREQ support
  132. and that the relevant menu configurations are displayed for
  133. it.
  134. config ARCH_HAS_CPU_IDLE_WAIT
  135. def_bool y
  136. config GENERIC_HWEIGHT
  137. bool
  138. default y
  139. config GENERIC_CALIBRATE_DELAY
  140. bool
  141. default y
  142. config ARCH_MAY_HAVE_PC_FDC
  143. bool
  144. config ZONE_DMA
  145. bool
  146. config NEED_DMA_MAP_STATE
  147. def_bool y
  148. config GENERIC_ISA_DMA
  149. bool
  150. config FIQ
  151. bool
  152. config ARCH_MTD_XIP
  153. bool
  154. config VECTORS_BASE
  155. hex
  156. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  157. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  158. default 0x00000000
  159. help
  160. The base address of exception vectors.
  161. config ARM_PATCH_PHYS_VIRT
  162. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  163. default y
  164. depends on !XIP_KERNEL && MMU
  165. depends on !ARCH_REALVIEW || !SPARSEMEM
  166. help
  167. Patch phys-to-virt and virt-to-phys translation functions at
  168. boot and module load time according to the position of the
  169. kernel in system memory.
  170. This can only be used with non-XIP MMU kernels where the base
  171. of physical memory is at a 16MB boundary.
  172. Only disable this option if you know that you do not require
  173. this feature (eg, building a kernel for a single machine) and
  174. you need to shrink the kernel to the minimal size.
  175. config NEED_MACH_MEMORY_H
  176. bool
  177. help
  178. Select this when mach/memory.h is required to provide special
  179. definitions for this platform. The need for mach/memory.h should
  180. be avoided when possible.
  181. config PHYS_OFFSET
  182. hex "Physical address of main memory" if MMU
  183. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  184. default DRAM_BASE if !MMU
  185. help
  186. Please provide the physical address corresponding to the
  187. location of main memory in your system.
  188. config GENERIC_BUG
  189. def_bool y
  190. depends on BUG
  191. source "init/Kconfig"
  192. source "kernel/Kconfig.freezer"
  193. menu "System Type"
  194. config MMU
  195. bool "MMU-based Paged Memory Management Support"
  196. default y
  197. help
  198. Select if you want MMU-based virtualised addressing space
  199. support by paged memory management. If unsure, say 'Y'.
  200. #
  201. # The "ARM system type" choice list is ordered alphabetically by option
  202. # text. Please add new entries in the option alphabetic order.
  203. #
  204. choice
  205. prompt "ARM system type"
  206. default ARCH_VERSATILE
  207. config ARCH_INTEGRATOR
  208. bool "ARM Ltd. Integrator family"
  209. select ARM_AMBA
  210. select ARCH_HAS_CPUFREQ
  211. select CLKDEV_LOOKUP
  212. select HAVE_MACH_CLKDEV
  213. select HAVE_TCM
  214. select ICST
  215. select GENERIC_CLOCKEVENTS
  216. select PLAT_VERSATILE
  217. select PLAT_VERSATILE_FPGA_IRQ
  218. select NEED_MACH_MEMORY_H
  219. help
  220. Support for ARM's Integrator platform.
  221. config ARCH_REALVIEW
  222. bool "ARM Ltd. RealView family"
  223. select ARM_AMBA
  224. select CLKDEV_LOOKUP
  225. select HAVE_MACH_CLKDEV
  226. select ICST
  227. select GENERIC_CLOCKEVENTS
  228. select ARCH_WANT_OPTIONAL_GPIOLIB
  229. select PLAT_VERSATILE
  230. select PLAT_VERSATILE_CLCD
  231. select ARM_TIMER_SP804
  232. select GPIO_PL061 if GPIOLIB
  233. select NEED_MACH_MEMORY_H
  234. help
  235. This enables support for ARM Ltd RealView boards.
  236. config ARCH_VERSATILE
  237. bool "ARM Ltd. Versatile family"
  238. select ARM_AMBA
  239. select ARM_VIC
  240. select CLKDEV_LOOKUP
  241. select HAVE_MACH_CLKDEV
  242. select ICST
  243. select GENERIC_CLOCKEVENTS
  244. select ARCH_WANT_OPTIONAL_GPIOLIB
  245. select PLAT_VERSATILE
  246. select PLAT_VERSATILE_CLCD
  247. select PLAT_VERSATILE_FPGA_IRQ
  248. select ARM_TIMER_SP804
  249. help
  250. This enables support for ARM Ltd Versatile board.
  251. config ARCH_VEXPRESS
  252. bool "ARM Ltd. Versatile Express family"
  253. select ARCH_WANT_OPTIONAL_GPIOLIB
  254. select ARM_AMBA
  255. select ARM_TIMER_SP804
  256. select CLKDEV_LOOKUP
  257. select HAVE_MACH_CLKDEV
  258. select GENERIC_CLOCKEVENTS
  259. select HAVE_CLK
  260. select HAVE_PATA_PLATFORM
  261. select ICST
  262. select NO_IOPORT
  263. select PLAT_VERSATILE
  264. select PLAT_VERSATILE_CLCD
  265. help
  266. This enables support for the ARM Ltd Versatile Express boards.
  267. config ARCH_AT91
  268. bool "Atmel AT91"
  269. select ARCH_REQUIRE_GPIOLIB
  270. select HAVE_CLK
  271. select CLKDEV_LOOKUP
  272. help
  273. This enables support for systems based on the Atmel AT91RM9200,
  274. AT91SAM9 and AT91CAP9 processors.
  275. config ARCH_BCMRING
  276. bool "Broadcom BCMRING"
  277. depends on MMU
  278. select CPU_V6
  279. select ARM_AMBA
  280. select ARM_TIMER_SP804
  281. select CLKDEV_LOOKUP
  282. select GENERIC_CLOCKEVENTS
  283. select ARCH_WANT_OPTIONAL_GPIOLIB
  284. help
  285. Support for Broadcom's BCMRing platform.
  286. config ARCH_HIGHBANK
  287. bool "Calxeda Highbank-based"
  288. select ARCH_WANT_OPTIONAL_GPIOLIB
  289. select ARM_AMBA
  290. select ARM_GIC
  291. select ARM_TIMER_SP804
  292. select CACHE_L2X0
  293. select CLKDEV_LOOKUP
  294. select CPU_V7
  295. select GENERIC_CLOCKEVENTS
  296. select HAVE_ARM_SCU
  297. select HAVE_SMP
  298. select USE_OF
  299. help
  300. Support for the Calxeda Highbank SoC based boards.
  301. config ARCH_CLPS711X
  302. bool "Cirrus Logic CLPS711x/EP721x-based"
  303. select CPU_ARM720T
  304. select ARCH_USES_GETTIMEOFFSET
  305. select NEED_MACH_MEMORY_H
  306. help
  307. Support for Cirrus Logic 711x/721x based boards.
  308. config ARCH_CNS3XXX
  309. bool "Cavium Networks CNS3XXX family"
  310. select CPU_V6K
  311. select GENERIC_CLOCKEVENTS
  312. select ARM_GIC
  313. select MIGHT_HAVE_CACHE_L2X0
  314. select MIGHT_HAVE_PCI
  315. select PCI_DOMAINS if PCI
  316. help
  317. Support for Cavium Networks CNS3XXX platform.
  318. config ARCH_GEMINI
  319. bool "Cortina Systems Gemini"
  320. select CPU_FA526
  321. select ARCH_REQUIRE_GPIOLIB
  322. select ARCH_USES_GETTIMEOFFSET
  323. help
  324. Support for the Cortina Systems Gemini family SoCs
  325. config ARCH_PRIMA2
  326. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  327. select CPU_V7
  328. select NO_IOPORT
  329. select GENERIC_CLOCKEVENTS
  330. select CLKDEV_LOOKUP
  331. select GENERIC_IRQ_CHIP
  332. select MIGHT_HAVE_CACHE_L2X0
  333. select USE_OF
  334. select ZONE_DMA
  335. help
  336. Support for CSR SiRFSoC ARM Cortex A9 Platform
  337. config ARCH_EBSA110
  338. bool "EBSA-110"
  339. select CPU_SA110
  340. select ISA
  341. select NO_IOPORT
  342. select ARCH_USES_GETTIMEOFFSET
  343. select NEED_MACH_MEMORY_H
  344. help
  345. This is an evaluation board for the StrongARM processor available
  346. from Digital. It has limited hardware on-board, including an
  347. Ethernet interface, two PCMCIA sockets, two serial ports and a
  348. parallel port.
  349. config ARCH_EP93XX
  350. bool "EP93xx-based"
  351. select CPU_ARM920T
  352. select ARM_AMBA
  353. select ARM_VIC
  354. select CLKDEV_LOOKUP
  355. select ARCH_REQUIRE_GPIOLIB
  356. select ARCH_HAS_HOLES_MEMORYMODEL
  357. select ARCH_USES_GETTIMEOFFSET
  358. select NEED_MACH_MEMORY_H
  359. help
  360. This enables support for the Cirrus EP93xx series of CPUs.
  361. config ARCH_FOOTBRIDGE
  362. bool "FootBridge"
  363. select CPU_SA110
  364. select FOOTBRIDGE
  365. select GENERIC_CLOCKEVENTS
  366. select HAVE_IDE
  367. select NEED_MACH_MEMORY_H
  368. help
  369. Support for systems based on the DC21285 companion chip
  370. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  371. config ARCH_MXC
  372. bool "Freescale MXC/iMX-based"
  373. select GENERIC_CLOCKEVENTS
  374. select ARCH_REQUIRE_GPIOLIB
  375. select CLKDEV_LOOKUP
  376. select CLKSRC_MMIO
  377. select GENERIC_IRQ_CHIP
  378. select HAVE_SCHED_CLOCK
  379. select MULTI_IRQ_HANDLER
  380. help
  381. Support for Freescale MXC/iMX-based family of processors
  382. config ARCH_MXS
  383. bool "Freescale MXS-based"
  384. select GENERIC_CLOCKEVENTS
  385. select ARCH_REQUIRE_GPIOLIB
  386. select CLKDEV_LOOKUP
  387. select CLKSRC_MMIO
  388. select HAVE_CLK_PREPARE
  389. help
  390. Support for Freescale MXS-based family of processors
  391. config ARCH_NETX
  392. bool "Hilscher NetX based"
  393. select CLKSRC_MMIO
  394. select CPU_ARM926T
  395. select ARM_VIC
  396. select GENERIC_CLOCKEVENTS
  397. help
  398. This enables support for systems based on the Hilscher NetX Soc
  399. config ARCH_H720X
  400. bool "Hynix HMS720x-based"
  401. select CPU_ARM720T
  402. select ISA_DMA_API
  403. select ARCH_USES_GETTIMEOFFSET
  404. help
  405. This enables support for systems based on the Hynix HMS720x
  406. config ARCH_IOP13XX
  407. bool "IOP13xx-based"
  408. depends on MMU
  409. select CPU_XSC3
  410. select PLAT_IOP
  411. select PCI
  412. select ARCH_SUPPORTS_MSI
  413. select VMSPLIT_1G
  414. select NEED_MACH_MEMORY_H
  415. help
  416. Support for Intel's IOP13XX (XScale) family of processors.
  417. config ARCH_IOP32X
  418. bool "IOP32x-based"
  419. depends on MMU
  420. select CPU_XSCALE
  421. select PLAT_IOP
  422. select PCI
  423. select ARCH_REQUIRE_GPIOLIB
  424. help
  425. Support for Intel's 80219 and IOP32X (XScale) family of
  426. processors.
  427. config ARCH_IOP33X
  428. bool "IOP33x-based"
  429. depends on MMU
  430. select CPU_XSCALE
  431. select PLAT_IOP
  432. select PCI
  433. select ARCH_REQUIRE_GPIOLIB
  434. help
  435. Support for Intel's IOP33X (XScale) family of processors.
  436. config ARCH_IXP23XX
  437. bool "IXP23XX-based"
  438. depends on MMU
  439. select CPU_XSC3
  440. select PCI
  441. select ARCH_USES_GETTIMEOFFSET
  442. select NEED_MACH_MEMORY_H
  443. help
  444. Support for Intel's IXP23xx (XScale) family of processors.
  445. config ARCH_IXP2000
  446. bool "IXP2400/2800-based"
  447. depends on MMU
  448. select CPU_XSCALE
  449. select PCI
  450. select ARCH_USES_GETTIMEOFFSET
  451. select NEED_MACH_MEMORY_H
  452. help
  453. Support for Intel's IXP2400/2800 (XScale) family of processors.
  454. config ARCH_IXP4XX
  455. bool "IXP4xx-based"
  456. depends on MMU
  457. select CLKSRC_MMIO
  458. select CPU_XSCALE
  459. select GENERIC_GPIO
  460. select GENERIC_CLOCKEVENTS
  461. select HAVE_SCHED_CLOCK
  462. select MIGHT_HAVE_PCI
  463. select DMABOUNCE if PCI
  464. help
  465. Support for Intel's IXP4XX (XScale) family of processors.
  466. config ARCH_DOVE
  467. bool "Marvell Dove"
  468. select CPU_V7
  469. select PCI
  470. select ARCH_REQUIRE_GPIOLIB
  471. select GENERIC_CLOCKEVENTS
  472. select PLAT_ORION
  473. help
  474. Support for the Marvell Dove SoC 88AP510
  475. config ARCH_KIRKWOOD
  476. bool "Marvell Kirkwood"
  477. select CPU_FEROCEON
  478. select PCI
  479. select ARCH_REQUIRE_GPIOLIB
  480. select GENERIC_CLOCKEVENTS
  481. select PLAT_ORION
  482. help
  483. Support for the following Marvell Kirkwood series SoCs:
  484. 88F6180, 88F6192 and 88F6281.
  485. config ARCH_LPC32XX
  486. bool "NXP LPC32XX"
  487. select CLKSRC_MMIO
  488. select CPU_ARM926T
  489. select ARCH_REQUIRE_GPIOLIB
  490. select HAVE_IDE
  491. select ARM_AMBA
  492. select USB_ARCH_HAS_OHCI
  493. select CLKDEV_LOOKUP
  494. select GENERIC_CLOCKEVENTS
  495. help
  496. Support for the NXP LPC32XX family of processors
  497. config ARCH_MV78XX0
  498. bool "Marvell MV78xx0"
  499. select CPU_FEROCEON
  500. select PCI
  501. select ARCH_REQUIRE_GPIOLIB
  502. select GENERIC_CLOCKEVENTS
  503. select PLAT_ORION
  504. help
  505. Support for the following Marvell MV78xx0 series SoCs:
  506. MV781x0, MV782x0.
  507. config ARCH_ORION5X
  508. bool "Marvell Orion"
  509. depends on MMU
  510. select CPU_FEROCEON
  511. select PCI
  512. select ARCH_REQUIRE_GPIOLIB
  513. select GENERIC_CLOCKEVENTS
  514. select PLAT_ORION
  515. help
  516. Support for the following Marvell Orion 5x series SoCs:
  517. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  518. Orion-2 (5281), Orion-1-90 (6183).
  519. config ARCH_MMP
  520. bool "Marvell PXA168/910/MMP2"
  521. depends on MMU
  522. select ARCH_REQUIRE_GPIOLIB
  523. select CLKDEV_LOOKUP
  524. select GENERIC_CLOCKEVENTS
  525. select GPIO_PXA
  526. select HAVE_SCHED_CLOCK
  527. select TICK_ONESHOT
  528. select PLAT_PXA
  529. select SPARSE_IRQ
  530. select GENERIC_ALLOCATOR
  531. help
  532. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  533. config ARCH_KS8695
  534. bool "Micrel/Kendin KS8695"
  535. select CPU_ARM922T
  536. select ARCH_REQUIRE_GPIOLIB
  537. select ARCH_USES_GETTIMEOFFSET
  538. select NEED_MACH_MEMORY_H
  539. help
  540. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  541. System-on-Chip devices.
  542. config ARCH_W90X900
  543. bool "Nuvoton W90X900 CPU"
  544. select CPU_ARM926T
  545. select ARCH_REQUIRE_GPIOLIB
  546. select CLKDEV_LOOKUP
  547. select CLKSRC_MMIO
  548. select GENERIC_CLOCKEVENTS
  549. help
  550. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  551. At present, the w90x900 has been renamed nuc900, regarding
  552. the ARM series product line, you can login the following
  553. link address to know more.
  554. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  555. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  556. config ARCH_TEGRA
  557. bool "NVIDIA Tegra"
  558. select CLKDEV_LOOKUP
  559. select CLKSRC_MMIO
  560. select GENERIC_CLOCKEVENTS
  561. select GENERIC_GPIO
  562. select HAVE_CLK
  563. select HAVE_SCHED_CLOCK
  564. select HAVE_SMP
  565. select MIGHT_HAVE_CACHE_L2X0
  566. select ARCH_HAS_CPUFREQ
  567. help
  568. This enables support for NVIDIA Tegra based systems (Tegra APX,
  569. Tegra 6xx and Tegra 2 series).
  570. config ARCH_PICOXCELL
  571. bool "Picochip picoXcell"
  572. select ARCH_REQUIRE_GPIOLIB
  573. select ARM_PATCH_PHYS_VIRT
  574. select ARM_VIC
  575. select CPU_V6K
  576. select DW_APB_TIMER
  577. select GENERIC_CLOCKEVENTS
  578. select GENERIC_GPIO
  579. select HAVE_SCHED_CLOCK
  580. select HAVE_TCM
  581. select NO_IOPORT
  582. select SPARSE_IRQ
  583. select USE_OF
  584. help
  585. This enables support for systems based on the Picochip picoXcell
  586. family of Femtocell devices. The picoxcell support requires device tree
  587. for all boards.
  588. config ARCH_PNX4008
  589. bool "Philips Nexperia PNX4008 Mobile"
  590. select CPU_ARM926T
  591. select CLKDEV_LOOKUP
  592. select ARCH_USES_GETTIMEOFFSET
  593. help
  594. This enables support for Philips PNX4008 mobile platform.
  595. config ARCH_PXA
  596. bool "PXA2xx/PXA3xx-based"
  597. depends on MMU
  598. select ARCH_MTD_XIP
  599. select ARCH_HAS_CPUFREQ
  600. select CLKDEV_LOOKUP
  601. select CLKSRC_MMIO
  602. select ARCH_REQUIRE_GPIOLIB
  603. select GENERIC_CLOCKEVENTS
  604. select GPIO_PXA
  605. select HAVE_SCHED_CLOCK
  606. select TICK_ONESHOT
  607. select PLAT_PXA
  608. select SPARSE_IRQ
  609. select AUTO_ZRELADDR
  610. select MULTI_IRQ_HANDLER
  611. select ARM_CPU_SUSPEND if PM
  612. select HAVE_IDE
  613. help
  614. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  615. config ARCH_MSM
  616. bool "Qualcomm MSM"
  617. select HAVE_CLK
  618. select GENERIC_CLOCKEVENTS
  619. select ARCH_REQUIRE_GPIOLIB
  620. select CLKDEV_LOOKUP
  621. help
  622. Support for Qualcomm MSM/QSD based systems. This runs on the
  623. apps processor of the MSM/QSD and depends on a shared memory
  624. interface to the modem processor which runs the baseband
  625. stack and controls some vital subsystems
  626. (clock and power control, etc).
  627. config ARCH_SHMOBILE
  628. bool "Renesas SH-Mobile / R-Mobile"
  629. select HAVE_CLK
  630. select CLKDEV_LOOKUP
  631. select HAVE_MACH_CLKDEV
  632. select HAVE_SMP
  633. select GENERIC_CLOCKEVENTS
  634. select MIGHT_HAVE_CACHE_L2X0
  635. select NO_IOPORT
  636. select SPARSE_IRQ
  637. select MULTI_IRQ_HANDLER
  638. select PM_GENERIC_DOMAINS if PM
  639. select NEED_MACH_MEMORY_H
  640. help
  641. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  642. config ARCH_RPC
  643. bool "RiscPC"
  644. select ARCH_ACORN
  645. select FIQ
  646. select TIMER_ACORN
  647. select ARCH_MAY_HAVE_PC_FDC
  648. select HAVE_PATA_PLATFORM
  649. select ISA_DMA_API
  650. select NO_IOPORT
  651. select ARCH_SPARSEMEM_ENABLE
  652. select ARCH_USES_GETTIMEOFFSET
  653. select HAVE_IDE
  654. select NEED_MACH_MEMORY_H
  655. help
  656. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  657. CD-ROM interface, serial and parallel port, and the floppy drive.
  658. config ARCH_SA1100
  659. bool "SA1100-based"
  660. select CLKSRC_MMIO
  661. select CPU_SA1100
  662. select ISA
  663. select ARCH_SPARSEMEM_ENABLE
  664. select ARCH_MTD_XIP
  665. select ARCH_HAS_CPUFREQ
  666. select CPU_FREQ
  667. select GENERIC_CLOCKEVENTS
  668. select CLKDEV_LOOKUP
  669. select HAVE_SCHED_CLOCK
  670. select TICK_ONESHOT
  671. select ARCH_REQUIRE_GPIOLIB
  672. select HAVE_IDE
  673. select NEED_MACH_MEMORY_H
  674. help
  675. Support for StrongARM 11x0 based boards.
  676. config ARCH_S3C2410
  677. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  678. select GENERIC_GPIO
  679. select ARCH_HAS_CPUFREQ
  680. select HAVE_CLK
  681. select CLKDEV_LOOKUP
  682. select ARCH_USES_GETTIMEOFFSET
  683. select HAVE_S3C2410_I2C if I2C
  684. help
  685. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  686. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  687. the Samsung SMDK2410 development board (and derivatives).
  688. Note, the S3C2416 and the S3C2450 are so close that they even share
  689. the same SoC ID code. This means that there is no separate machine
  690. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  691. config ARCH_S3C64XX
  692. bool "Samsung S3C64XX"
  693. select PLAT_SAMSUNG
  694. select CPU_V6
  695. select ARM_VIC
  696. select HAVE_CLK
  697. select HAVE_TCM
  698. select CLKDEV_LOOKUP
  699. select NO_IOPORT
  700. select ARCH_USES_GETTIMEOFFSET
  701. select ARCH_HAS_CPUFREQ
  702. select ARCH_REQUIRE_GPIOLIB
  703. select SAMSUNG_CLKSRC
  704. select SAMSUNG_IRQ_VIC_TIMER
  705. select S3C_GPIO_TRACK
  706. select S3C_DEV_NAND
  707. select USB_ARCH_HAS_OHCI
  708. select SAMSUNG_GPIOLIB_4BIT
  709. select HAVE_S3C2410_I2C if I2C
  710. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  711. help
  712. Samsung S3C64XX series based systems
  713. config ARCH_S5P64X0
  714. bool "Samsung S5P6440 S5P6450"
  715. select CPU_V6
  716. select GENERIC_GPIO
  717. select HAVE_CLK
  718. select CLKDEV_LOOKUP
  719. select CLKSRC_MMIO
  720. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  721. select GENERIC_CLOCKEVENTS
  722. select HAVE_SCHED_CLOCK
  723. select HAVE_S3C2410_I2C if I2C
  724. select HAVE_S3C_RTC if RTC_CLASS
  725. help
  726. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  727. SMDK6450.
  728. config ARCH_S5PC100
  729. bool "Samsung S5PC100"
  730. select GENERIC_GPIO
  731. select HAVE_CLK
  732. select CLKDEV_LOOKUP
  733. select CPU_V7
  734. select ARM_L1_CACHE_SHIFT_6
  735. select ARCH_USES_GETTIMEOFFSET
  736. select HAVE_S3C2410_I2C if I2C
  737. select HAVE_S3C_RTC if RTC_CLASS
  738. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  739. help
  740. Samsung S5PC100 series based systems
  741. config ARCH_S5PV210
  742. bool "Samsung S5PV210/S5PC110"
  743. select CPU_V7
  744. select ARCH_SPARSEMEM_ENABLE
  745. select ARCH_HAS_HOLES_MEMORYMODEL
  746. select GENERIC_GPIO
  747. select HAVE_CLK
  748. select CLKDEV_LOOKUP
  749. select CLKSRC_MMIO
  750. select ARM_L1_CACHE_SHIFT_6
  751. select ARCH_HAS_CPUFREQ
  752. select GENERIC_CLOCKEVENTS
  753. select HAVE_SCHED_CLOCK
  754. select HAVE_S3C2410_I2C if I2C
  755. select HAVE_S3C_RTC if RTC_CLASS
  756. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  757. select NEED_MACH_MEMORY_H
  758. help
  759. Samsung S5PV210/S5PC110 series based systems
  760. config ARCH_EXYNOS
  761. bool "SAMSUNG EXYNOS"
  762. select CPU_V7
  763. select ARCH_SPARSEMEM_ENABLE
  764. select ARCH_HAS_HOLES_MEMORYMODEL
  765. select GENERIC_GPIO
  766. select HAVE_CLK
  767. select CLKDEV_LOOKUP
  768. select ARCH_HAS_CPUFREQ
  769. select GENERIC_CLOCKEVENTS
  770. select HAVE_S3C_RTC if RTC_CLASS
  771. select HAVE_S3C2410_I2C if I2C
  772. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  773. select NEED_MACH_MEMORY_H
  774. help
  775. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  776. config ARCH_SHARK
  777. bool "Shark"
  778. select CPU_SA110
  779. select ISA
  780. select ISA_DMA
  781. select ZONE_DMA
  782. select PCI
  783. select ARCH_USES_GETTIMEOFFSET
  784. select NEED_MACH_MEMORY_H
  785. help
  786. Support for the StrongARM based Digital DNARD machine, also known
  787. as "Shark" (<http://www.shark-linux.de/shark.html>).
  788. config ARCH_U300
  789. bool "ST-Ericsson U300 Series"
  790. depends on MMU
  791. select CLKSRC_MMIO
  792. select CPU_ARM926T
  793. select HAVE_SCHED_CLOCK
  794. select HAVE_TCM
  795. select ARM_AMBA
  796. select ARM_PATCH_PHYS_VIRT
  797. select ARM_VIC
  798. select GENERIC_CLOCKEVENTS
  799. select CLKDEV_LOOKUP
  800. select HAVE_MACH_CLKDEV
  801. select GENERIC_GPIO
  802. select ARCH_REQUIRE_GPIOLIB
  803. help
  804. Support for ST-Ericsson U300 series mobile platforms.
  805. config ARCH_U8500
  806. bool "ST-Ericsson U8500 Series"
  807. select CPU_V7
  808. select ARM_AMBA
  809. select GENERIC_CLOCKEVENTS
  810. select CLKDEV_LOOKUP
  811. select ARCH_REQUIRE_GPIOLIB
  812. select ARCH_HAS_CPUFREQ
  813. select HAVE_SMP
  814. select MIGHT_HAVE_CACHE_L2X0
  815. help
  816. Support for ST-Ericsson's Ux500 architecture
  817. config ARCH_NOMADIK
  818. bool "STMicroelectronics Nomadik"
  819. select ARM_AMBA
  820. select ARM_VIC
  821. select CPU_ARM926T
  822. select CLKDEV_LOOKUP
  823. select GENERIC_CLOCKEVENTS
  824. select MIGHT_HAVE_CACHE_L2X0
  825. select ARCH_REQUIRE_GPIOLIB
  826. help
  827. Support for the Nomadik platform by ST-Ericsson
  828. config ARCH_DAVINCI
  829. bool "TI DaVinci"
  830. select GENERIC_CLOCKEVENTS
  831. select ARCH_REQUIRE_GPIOLIB
  832. select ZONE_DMA
  833. select HAVE_IDE
  834. select CLKDEV_LOOKUP
  835. select GENERIC_ALLOCATOR
  836. select GENERIC_IRQ_CHIP
  837. select ARCH_HAS_HOLES_MEMORYMODEL
  838. help
  839. Support for TI's DaVinci platform.
  840. config ARCH_OMAP
  841. bool "TI OMAP"
  842. select HAVE_CLK
  843. select ARCH_REQUIRE_GPIOLIB
  844. select ARCH_HAS_CPUFREQ
  845. select CLKSRC_MMIO
  846. select GENERIC_CLOCKEVENTS
  847. select HAVE_SCHED_CLOCK
  848. select ARCH_HAS_HOLES_MEMORYMODEL
  849. help
  850. Support for TI's OMAP platform (OMAP1/2/3/4).
  851. config PLAT_SPEAR
  852. bool "ST SPEAr"
  853. select ARM_AMBA
  854. select ARCH_REQUIRE_GPIOLIB
  855. select CLKDEV_LOOKUP
  856. select CLKSRC_MMIO
  857. select GENERIC_CLOCKEVENTS
  858. select HAVE_CLK
  859. help
  860. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  861. config ARCH_VT8500
  862. bool "VIA/WonderMedia 85xx"
  863. select CPU_ARM926T
  864. select GENERIC_GPIO
  865. select ARCH_HAS_CPUFREQ
  866. select GENERIC_CLOCKEVENTS
  867. select ARCH_REQUIRE_GPIOLIB
  868. select HAVE_PWM
  869. help
  870. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  871. config ARCH_ZYNQ
  872. bool "Xilinx Zynq ARM Cortex A9 Platform"
  873. select CPU_V7
  874. select GENERIC_CLOCKEVENTS
  875. select CLKDEV_LOOKUP
  876. select ARM_GIC
  877. select ARM_AMBA
  878. select ICST
  879. select MIGHT_HAVE_CACHE_L2X0
  880. select USE_OF
  881. help
  882. Support for Xilinx Zynq ARM Cortex A9 Platform
  883. endchoice
  884. #
  885. # This is sorted alphabetically by mach-* pathname. However, plat-*
  886. # Kconfigs may be included either alphabetically (according to the
  887. # plat- suffix) or along side the corresponding mach-* source.
  888. #
  889. source "arch/arm/mach-at91/Kconfig"
  890. source "arch/arm/mach-bcmring/Kconfig"
  891. source "arch/arm/mach-clps711x/Kconfig"
  892. source "arch/arm/mach-cns3xxx/Kconfig"
  893. source "arch/arm/mach-davinci/Kconfig"
  894. source "arch/arm/mach-dove/Kconfig"
  895. source "arch/arm/mach-ep93xx/Kconfig"
  896. source "arch/arm/mach-footbridge/Kconfig"
  897. source "arch/arm/mach-gemini/Kconfig"
  898. source "arch/arm/mach-h720x/Kconfig"
  899. source "arch/arm/mach-integrator/Kconfig"
  900. source "arch/arm/mach-iop32x/Kconfig"
  901. source "arch/arm/mach-iop33x/Kconfig"
  902. source "arch/arm/mach-iop13xx/Kconfig"
  903. source "arch/arm/mach-ixp4xx/Kconfig"
  904. source "arch/arm/mach-ixp2000/Kconfig"
  905. source "arch/arm/mach-ixp23xx/Kconfig"
  906. source "arch/arm/mach-kirkwood/Kconfig"
  907. source "arch/arm/mach-ks8695/Kconfig"
  908. source "arch/arm/mach-lpc32xx/Kconfig"
  909. source "arch/arm/mach-msm/Kconfig"
  910. source "arch/arm/mach-mv78xx0/Kconfig"
  911. source "arch/arm/plat-mxc/Kconfig"
  912. source "arch/arm/mach-mxs/Kconfig"
  913. source "arch/arm/mach-netx/Kconfig"
  914. source "arch/arm/mach-nomadik/Kconfig"
  915. source "arch/arm/plat-nomadik/Kconfig"
  916. source "arch/arm/plat-omap/Kconfig"
  917. source "arch/arm/mach-omap1/Kconfig"
  918. source "arch/arm/mach-omap2/Kconfig"
  919. source "arch/arm/mach-orion5x/Kconfig"
  920. source "arch/arm/mach-pxa/Kconfig"
  921. source "arch/arm/plat-pxa/Kconfig"
  922. source "arch/arm/mach-mmp/Kconfig"
  923. source "arch/arm/mach-realview/Kconfig"
  924. source "arch/arm/mach-sa1100/Kconfig"
  925. source "arch/arm/plat-samsung/Kconfig"
  926. source "arch/arm/plat-s3c24xx/Kconfig"
  927. source "arch/arm/plat-s5p/Kconfig"
  928. source "arch/arm/plat-spear/Kconfig"
  929. if ARCH_S3C2410
  930. source "arch/arm/mach-s3c2410/Kconfig"
  931. source "arch/arm/mach-s3c2412/Kconfig"
  932. source "arch/arm/mach-s3c2416/Kconfig"
  933. source "arch/arm/mach-s3c2440/Kconfig"
  934. source "arch/arm/mach-s3c2443/Kconfig"
  935. endif
  936. if ARCH_S3C64XX
  937. source "arch/arm/mach-s3c64xx/Kconfig"
  938. endif
  939. source "arch/arm/mach-s5p64x0/Kconfig"
  940. source "arch/arm/mach-s5pc100/Kconfig"
  941. source "arch/arm/mach-s5pv210/Kconfig"
  942. source "arch/arm/mach-exynos/Kconfig"
  943. source "arch/arm/mach-shmobile/Kconfig"
  944. source "arch/arm/mach-tegra/Kconfig"
  945. source "arch/arm/mach-u300/Kconfig"
  946. source "arch/arm/mach-ux500/Kconfig"
  947. source "arch/arm/mach-versatile/Kconfig"
  948. source "arch/arm/mach-vexpress/Kconfig"
  949. source "arch/arm/plat-versatile/Kconfig"
  950. source "arch/arm/mach-vt8500/Kconfig"
  951. source "arch/arm/mach-w90x900/Kconfig"
  952. # Definitions to make life easier
  953. config ARCH_ACORN
  954. bool
  955. config PLAT_IOP
  956. bool
  957. select GENERIC_CLOCKEVENTS
  958. select HAVE_SCHED_CLOCK
  959. config PLAT_ORION
  960. bool
  961. select CLKSRC_MMIO
  962. select GENERIC_IRQ_CHIP
  963. select HAVE_SCHED_CLOCK
  964. config PLAT_PXA
  965. bool
  966. config PLAT_VERSATILE
  967. bool
  968. config ARM_TIMER_SP804
  969. bool
  970. select CLKSRC_MMIO
  971. source arch/arm/mm/Kconfig
  972. config ARM_NR_BANKS
  973. int
  974. default 16 if ARCH_EP93XX
  975. default 8
  976. config IWMMXT
  977. bool "Enable iWMMXt support"
  978. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  979. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  980. help
  981. Enable support for iWMMXt context switching at run time if
  982. running on a CPU that supports it.
  983. config XSCALE_PMU
  984. bool
  985. depends on CPU_XSCALE
  986. default y
  987. config CPU_HAS_PMU
  988. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  989. (!ARCH_OMAP3 || OMAP3_EMU)
  990. default y
  991. bool
  992. config MULTI_IRQ_HANDLER
  993. bool
  994. help
  995. Allow each machine to specify it's own IRQ handler at run time.
  996. if !MMU
  997. source "arch/arm/Kconfig-nommu"
  998. endif
  999. config ARM_ERRATA_411920
  1000. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1001. depends on CPU_V6 || CPU_V6K
  1002. help
  1003. Invalidation of the Instruction Cache operation can
  1004. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1005. It does not affect the MPCore. This option enables the ARM Ltd.
  1006. recommended workaround.
  1007. config ARM_ERRATA_430973
  1008. bool "ARM errata: Stale prediction on replaced interworking branch"
  1009. depends on CPU_V7
  1010. help
  1011. This option enables the workaround for the 430973 Cortex-A8
  1012. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1013. interworking branch is replaced with another code sequence at the
  1014. same virtual address, whether due to self-modifying code or virtual
  1015. to physical address re-mapping, Cortex-A8 does not recover from the
  1016. stale interworking branch prediction. This results in Cortex-A8
  1017. executing the new code sequence in the incorrect ARM or Thumb state.
  1018. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1019. and also flushes the branch target cache at every context switch.
  1020. Note that setting specific bits in the ACTLR register may not be
  1021. available in non-secure mode.
  1022. config ARM_ERRATA_458693
  1023. bool "ARM errata: Processor deadlock when a false hazard is created"
  1024. depends on CPU_V7
  1025. help
  1026. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1027. erratum. For very specific sequences of memory operations, it is
  1028. possible for a hazard condition intended for a cache line to instead
  1029. be incorrectly associated with a different cache line. This false
  1030. hazard might then cause a processor deadlock. The workaround enables
  1031. the L1 caching of the NEON accesses and disables the PLD instruction
  1032. in the ACTLR register. Note that setting specific bits in the ACTLR
  1033. register may not be available in non-secure mode.
  1034. config ARM_ERRATA_460075
  1035. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1036. depends on CPU_V7
  1037. help
  1038. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1039. erratum. Any asynchronous access to the L2 cache may encounter a
  1040. situation in which recent store transactions to the L2 cache are lost
  1041. and overwritten with stale memory contents from external memory. The
  1042. workaround disables the write-allocate mode for the L2 cache via the
  1043. ACTLR register. Note that setting specific bits in the ACTLR register
  1044. may not be available in non-secure mode.
  1045. config ARM_ERRATA_742230
  1046. bool "ARM errata: DMB operation may be faulty"
  1047. depends on CPU_V7 && SMP
  1048. help
  1049. This option enables the workaround for the 742230 Cortex-A9
  1050. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1051. between two write operations may not ensure the correct visibility
  1052. ordering of the two writes. This workaround sets a specific bit in
  1053. the diagnostic register of the Cortex-A9 which causes the DMB
  1054. instruction to behave as a DSB, ensuring the correct behaviour of
  1055. the two writes.
  1056. config ARM_ERRATA_742231
  1057. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1058. depends on CPU_V7 && SMP
  1059. help
  1060. This option enables the workaround for the 742231 Cortex-A9
  1061. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1062. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1063. accessing some data located in the same cache line, may get corrupted
  1064. data due to bad handling of the address hazard when the line gets
  1065. replaced from one of the CPUs at the same time as another CPU is
  1066. accessing it. This workaround sets specific bits in the diagnostic
  1067. register of the Cortex-A9 which reduces the linefill issuing
  1068. capabilities of the processor.
  1069. config PL310_ERRATA_588369
  1070. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1071. depends on CACHE_L2X0
  1072. help
  1073. The PL310 L2 cache controller implements three types of Clean &
  1074. Invalidate maintenance operations: by Physical Address
  1075. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1076. They are architecturally defined to behave as the execution of a
  1077. clean operation followed immediately by an invalidate operation,
  1078. both performing to the same memory location. This functionality
  1079. is not correctly implemented in PL310 as clean lines are not
  1080. invalidated as a result of these operations.
  1081. config ARM_ERRATA_720789
  1082. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1083. depends on CPU_V7
  1084. help
  1085. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1086. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1087. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1088. As a consequence of this erratum, some TLB entries which should be
  1089. invalidated are not, resulting in an incoherency in the system page
  1090. tables. The workaround changes the TLB flushing routines to invalidate
  1091. entries regardless of the ASID.
  1092. config PL310_ERRATA_727915
  1093. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1094. depends on CACHE_L2X0
  1095. help
  1096. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1097. operation (offset 0x7FC). This operation runs in background so that
  1098. PL310 can handle normal accesses while it is in progress. Under very
  1099. rare circumstances, due to this erratum, write data can be lost when
  1100. PL310 treats a cacheable write transaction during a Clean &
  1101. Invalidate by Way operation.
  1102. config ARM_ERRATA_743622
  1103. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1104. depends on CPU_V7
  1105. help
  1106. This option enables the workaround for the 743622 Cortex-A9
  1107. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1108. optimisation in the Cortex-A9 Store Buffer may lead to data
  1109. corruption. This workaround sets a specific bit in the diagnostic
  1110. register of the Cortex-A9 which disables the Store Buffer
  1111. optimisation, preventing the defect from occurring. This has no
  1112. visible impact on the overall performance or power consumption of the
  1113. processor.
  1114. config ARM_ERRATA_751472
  1115. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1116. depends on CPU_V7
  1117. help
  1118. This option enables the workaround for the 751472 Cortex-A9 (prior
  1119. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1120. completion of a following broadcasted operation if the second
  1121. operation is received by a CPU before the ICIALLUIS has completed,
  1122. potentially leading to corrupted entries in the cache or TLB.
  1123. config PL310_ERRATA_753970
  1124. bool "PL310 errata: cache sync operation may be faulty"
  1125. depends on CACHE_PL310
  1126. help
  1127. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1128. Under some condition the effect of cache sync operation on
  1129. the store buffer still remains when the operation completes.
  1130. This means that the store buffer is always asked to drain and
  1131. this prevents it from merging any further writes. The workaround
  1132. is to replace the normal offset of cache sync operation (0x730)
  1133. by another offset targeting an unmapped PL310 register 0x740.
  1134. This has the same effect as the cache sync operation: store buffer
  1135. drain and waiting for all buffers empty.
  1136. config ARM_ERRATA_754322
  1137. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1138. depends on CPU_V7
  1139. help
  1140. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1141. r3p*) erratum. A speculative memory access may cause a page table walk
  1142. which starts prior to an ASID switch but completes afterwards. This
  1143. can populate the micro-TLB with a stale entry which may be hit with
  1144. the new ASID. This workaround places two dsb instructions in the mm
  1145. switching code so that no page table walks can cross the ASID switch.
  1146. config ARM_ERRATA_754327
  1147. bool "ARM errata: no automatic Store Buffer drain"
  1148. depends on CPU_V7 && SMP
  1149. help
  1150. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1151. r2p0) erratum. The Store Buffer does not have any automatic draining
  1152. mechanism and therefore a livelock may occur if an external agent
  1153. continuously polls a memory location waiting to observe an update.
  1154. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1155. written polling loops from denying visibility of updates to memory.
  1156. config ARM_ERRATA_364296
  1157. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1158. depends on CPU_V6 && !SMP
  1159. help
  1160. This options enables the workaround for the 364296 ARM1136
  1161. r0p2 erratum (possible cache data corruption with
  1162. hit-under-miss enabled). It sets the undocumented bit 31 in
  1163. the auxiliary control register and the FI bit in the control
  1164. register, thus disabling hit-under-miss without putting the
  1165. processor into full low interrupt latency mode. ARM11MPCore
  1166. is not affected.
  1167. config ARM_ERRATA_764369
  1168. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1169. depends on CPU_V7 && SMP
  1170. help
  1171. This option enables the workaround for erratum 764369
  1172. affecting Cortex-A9 MPCore with two or more processors (all
  1173. current revisions). Under certain timing circumstances, a data
  1174. cache line maintenance operation by MVA targeting an Inner
  1175. Shareable memory region may fail to proceed up to either the
  1176. Point of Coherency or to the Point of Unification of the
  1177. system. This workaround adds a DSB instruction before the
  1178. relevant cache maintenance functions and sets a specific bit
  1179. in the diagnostic control register of the SCU.
  1180. config PL310_ERRATA_769419
  1181. bool "PL310 errata: no automatic Store Buffer drain"
  1182. depends on CACHE_L2X0
  1183. help
  1184. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1185. not automatically drain. This can cause normal, non-cacheable
  1186. writes to be retained when the memory system is idle, leading
  1187. to suboptimal I/O performance for drivers using coherent DMA.
  1188. This option adds a write barrier to the cpu_idle loop so that,
  1189. on systems with an outer cache, the store buffer is drained
  1190. explicitly.
  1191. endmenu
  1192. source "arch/arm/common/Kconfig"
  1193. menu "Bus support"
  1194. config ARM_AMBA
  1195. bool
  1196. config ISA
  1197. bool
  1198. help
  1199. Find out whether you have ISA slots on your motherboard. ISA is the
  1200. name of a bus system, i.e. the way the CPU talks to the other stuff
  1201. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1202. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1203. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1204. # Select ISA DMA controller support
  1205. config ISA_DMA
  1206. bool
  1207. select ISA_DMA_API
  1208. # Select ISA DMA interface
  1209. config ISA_DMA_API
  1210. bool
  1211. config PCI
  1212. bool "PCI support" if MIGHT_HAVE_PCI
  1213. help
  1214. Find out whether you have a PCI motherboard. PCI is the name of a
  1215. bus system, i.e. the way the CPU talks to the other stuff inside
  1216. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1217. VESA. If you have PCI, say Y, otherwise N.
  1218. config PCI_DOMAINS
  1219. bool
  1220. depends on PCI
  1221. config PCI_NANOENGINE
  1222. bool "BSE nanoEngine PCI support"
  1223. depends on SA1100_NANOENGINE
  1224. help
  1225. Enable PCI on the BSE nanoEngine board.
  1226. config PCI_SYSCALL
  1227. def_bool PCI
  1228. # Select the host bridge type
  1229. config PCI_HOST_VIA82C505
  1230. bool
  1231. depends on PCI && ARCH_SHARK
  1232. default y
  1233. config PCI_HOST_ITE8152
  1234. bool
  1235. depends on PCI && MACH_ARMCORE
  1236. default y
  1237. select DMABOUNCE
  1238. source "drivers/pci/Kconfig"
  1239. source "drivers/pcmcia/Kconfig"
  1240. endmenu
  1241. menu "Kernel Features"
  1242. source "kernel/time/Kconfig"
  1243. config HAVE_SMP
  1244. bool
  1245. help
  1246. This option should be selected by machines which have an SMP-
  1247. capable CPU.
  1248. The only effect of this option is to make the SMP-related
  1249. options available to the user for configuration.
  1250. config SMP
  1251. bool "Symmetric Multi-Processing"
  1252. depends on CPU_V6K || CPU_V7
  1253. depends on GENERIC_CLOCKEVENTS
  1254. depends on HAVE_SMP
  1255. depends on MMU
  1256. select USE_GENERIC_SMP_HELPERS
  1257. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1258. help
  1259. This enables support for systems with more than one CPU. If you have
  1260. a system with only one CPU, like most personal computers, say N. If
  1261. you have a system with more than one CPU, say Y.
  1262. If you say N here, the kernel will run on single and multiprocessor
  1263. machines, but will use only one CPU of a multiprocessor machine. If
  1264. you say Y here, the kernel will run on many, but not all, single
  1265. processor machines. On a single processor machine, the kernel will
  1266. run faster if you say N here.
  1267. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1268. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1269. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1270. If you don't know what to do here, say N.
  1271. config SMP_ON_UP
  1272. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1273. depends on EXPERIMENTAL
  1274. depends on SMP && !XIP_KERNEL
  1275. default y
  1276. help
  1277. SMP kernels contain instructions which fail on non-SMP processors.
  1278. Enabling this option allows the kernel to modify itself to make
  1279. these instructions safe. Disabling it allows about 1K of space
  1280. savings.
  1281. If you don't know what to do here, say Y.
  1282. config ARM_CPU_TOPOLOGY
  1283. bool "Support cpu topology definition"
  1284. depends on SMP && CPU_V7
  1285. default y
  1286. help
  1287. Support ARM cpu topology definition. The MPIDR register defines
  1288. affinity between processors which is then used to describe the cpu
  1289. topology of an ARM System.
  1290. config SCHED_MC
  1291. bool "Multi-core scheduler support"
  1292. depends on ARM_CPU_TOPOLOGY
  1293. help
  1294. Multi-core scheduler support improves the CPU scheduler's decision
  1295. making when dealing with multi-core CPU chips at a cost of slightly
  1296. increased overhead in some places. If unsure say N here.
  1297. config SCHED_SMT
  1298. bool "SMT scheduler support"
  1299. depends on ARM_CPU_TOPOLOGY
  1300. help
  1301. Improves the CPU scheduler's decision making when dealing with
  1302. MultiThreading at a cost of slightly increased overhead in some
  1303. places. If unsure say N here.
  1304. config HAVE_ARM_SCU
  1305. bool
  1306. help
  1307. This option enables support for the ARM system coherency unit
  1308. config HAVE_ARM_TWD
  1309. bool
  1310. depends on SMP
  1311. select TICK_ONESHOT
  1312. help
  1313. This options enables support for the ARM timer and watchdog unit
  1314. choice
  1315. prompt "Memory split"
  1316. default VMSPLIT_3G
  1317. help
  1318. Select the desired split between kernel and user memory.
  1319. If you are not absolutely sure what you are doing, leave this
  1320. option alone!
  1321. config VMSPLIT_3G
  1322. bool "3G/1G user/kernel split"
  1323. config VMSPLIT_2G
  1324. bool "2G/2G user/kernel split"
  1325. config VMSPLIT_1G
  1326. bool "1G/3G user/kernel split"
  1327. endchoice
  1328. config PAGE_OFFSET
  1329. hex
  1330. default 0x40000000 if VMSPLIT_1G
  1331. default 0x80000000 if VMSPLIT_2G
  1332. default 0xC0000000
  1333. config NR_CPUS
  1334. int "Maximum number of CPUs (2-32)"
  1335. range 2 32
  1336. depends on SMP
  1337. default "4"
  1338. config HOTPLUG_CPU
  1339. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1340. depends on SMP && HOTPLUG && EXPERIMENTAL
  1341. help
  1342. Say Y here to experiment with turning CPUs off and on. CPUs
  1343. can be controlled through /sys/devices/system/cpu.
  1344. config LOCAL_TIMERS
  1345. bool "Use local timer interrupts"
  1346. depends on SMP
  1347. default y
  1348. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1349. help
  1350. Enable support for local timers on SMP platforms, rather then the
  1351. legacy IPI broadcast method. Local timers allows the system
  1352. accounting to be spread across the timer interval, preventing a
  1353. "thundering herd" at every timer tick.
  1354. config ARCH_NR_GPIO
  1355. int
  1356. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1357. default 350 if ARCH_U8500
  1358. default 0
  1359. help
  1360. Maximum number of GPIOs in the system.
  1361. If unsure, leave the default value.
  1362. source kernel/Kconfig.preempt
  1363. config HZ
  1364. int
  1365. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1366. ARCH_S5PV210 || ARCH_EXYNOS4
  1367. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1368. default AT91_TIMER_HZ if ARCH_AT91
  1369. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1370. default 100
  1371. config THUMB2_KERNEL
  1372. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1373. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1374. select AEABI
  1375. select ARM_ASM_UNIFIED
  1376. select ARM_UNWIND
  1377. help
  1378. By enabling this option, the kernel will be compiled in
  1379. Thumb-2 mode. A compiler/assembler that understand the unified
  1380. ARM-Thumb syntax is needed.
  1381. If unsure, say N.
  1382. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1383. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1384. depends on THUMB2_KERNEL && MODULES
  1385. default y
  1386. help
  1387. Various binutils versions can resolve Thumb-2 branches to
  1388. locally-defined, preemptible global symbols as short-range "b.n"
  1389. branch instructions.
  1390. This is a problem, because there's no guarantee the final
  1391. destination of the symbol, or any candidate locations for a
  1392. trampoline, are within range of the branch. For this reason, the
  1393. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1394. relocation in modules at all, and it makes little sense to add
  1395. support.
  1396. The symptom is that the kernel fails with an "unsupported
  1397. relocation" error when loading some modules.
  1398. Until fixed tools are available, passing
  1399. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1400. code which hits this problem, at the cost of a bit of extra runtime
  1401. stack usage in some cases.
  1402. The problem is described in more detail at:
  1403. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1404. Only Thumb-2 kernels are affected.
  1405. Unless you are sure your tools don't have this problem, say Y.
  1406. config ARM_ASM_UNIFIED
  1407. bool
  1408. config AEABI
  1409. bool "Use the ARM EABI to compile the kernel"
  1410. help
  1411. This option allows for the kernel to be compiled using the latest
  1412. ARM ABI (aka EABI). This is only useful if you are using a user
  1413. space environment that is also compiled with EABI.
  1414. Since there are major incompatibilities between the legacy ABI and
  1415. EABI, especially with regard to structure member alignment, this
  1416. option also changes the kernel syscall calling convention to
  1417. disambiguate both ABIs and allow for backward compatibility support
  1418. (selected with CONFIG_OABI_COMPAT).
  1419. To use this you need GCC version 4.0.0 or later.
  1420. config OABI_COMPAT
  1421. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1422. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1423. default y
  1424. help
  1425. This option preserves the old syscall interface along with the
  1426. new (ARM EABI) one. It also provides a compatibility layer to
  1427. intercept syscalls that have structure arguments which layout
  1428. in memory differs between the legacy ABI and the new ARM EABI
  1429. (only for non "thumb" binaries). This option adds a tiny
  1430. overhead to all syscalls and produces a slightly larger kernel.
  1431. If you know you'll be using only pure EABI user space then you
  1432. can say N here. If this option is not selected and you attempt
  1433. to execute a legacy ABI binary then the result will be
  1434. UNPREDICTABLE (in fact it can be predicted that it won't work
  1435. at all). If in doubt say Y.
  1436. config ARCH_HAS_HOLES_MEMORYMODEL
  1437. bool
  1438. config ARCH_SPARSEMEM_ENABLE
  1439. bool
  1440. config ARCH_SPARSEMEM_DEFAULT
  1441. def_bool ARCH_SPARSEMEM_ENABLE
  1442. config ARCH_SELECT_MEMORY_MODEL
  1443. def_bool ARCH_SPARSEMEM_ENABLE
  1444. config HAVE_ARCH_PFN_VALID
  1445. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1446. config HIGHMEM
  1447. bool "High Memory Support"
  1448. depends on MMU
  1449. help
  1450. The address space of ARM processors is only 4 Gigabytes large
  1451. and it has to accommodate user address space, kernel address
  1452. space as well as some memory mapped IO. That means that, if you
  1453. have a large amount of physical memory and/or IO, not all of the
  1454. memory can be "permanently mapped" by the kernel. The physical
  1455. memory that is not permanently mapped is called "high memory".
  1456. Depending on the selected kernel/user memory split, minimum
  1457. vmalloc space and actual amount of RAM, you may not need this
  1458. option which should result in a slightly faster kernel.
  1459. If unsure, say n.
  1460. config HIGHPTE
  1461. bool "Allocate 2nd-level pagetables from highmem"
  1462. depends on HIGHMEM
  1463. config HW_PERF_EVENTS
  1464. bool "Enable hardware performance counter support for perf events"
  1465. depends on PERF_EVENTS && CPU_HAS_PMU
  1466. default y
  1467. help
  1468. Enable hardware performance counter support for perf events. If
  1469. disabled, perf events will use software events only.
  1470. source "mm/Kconfig"
  1471. config FORCE_MAX_ZONEORDER
  1472. int "Maximum zone order" if ARCH_SHMOBILE
  1473. range 11 64 if ARCH_SHMOBILE
  1474. default "9" if SA1111
  1475. default "11"
  1476. help
  1477. The kernel memory allocator divides physically contiguous memory
  1478. blocks into "zones", where each zone is a power of two number of
  1479. pages. This option selects the largest power of two that the kernel
  1480. keeps in the memory allocator. If you need to allocate very large
  1481. blocks of physically contiguous memory, then you may need to
  1482. increase this value.
  1483. This config option is actually maximum order plus one. For example,
  1484. a value of 11 means that the largest free memory block is 2^10 pages.
  1485. config LEDS
  1486. bool "Timer and CPU usage LEDs"
  1487. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1488. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1489. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1490. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1491. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1492. ARCH_AT91 || ARCH_DAVINCI || \
  1493. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1494. help
  1495. If you say Y here, the LEDs on your machine will be used
  1496. to provide useful information about your current system status.
  1497. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1498. be able to select which LEDs are active using the options below. If
  1499. you are compiling a kernel for the EBSA-110 or the LART however, the
  1500. red LED will simply flash regularly to indicate that the system is
  1501. still functional. It is safe to say Y here if you have a CATS
  1502. system, but the driver will do nothing.
  1503. config LEDS_TIMER
  1504. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1505. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1506. || MACH_OMAP_PERSEUS2
  1507. depends on LEDS
  1508. depends on !GENERIC_CLOCKEVENTS
  1509. default y if ARCH_EBSA110
  1510. help
  1511. If you say Y here, one of the system LEDs (the green one on the
  1512. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1513. will flash regularly to indicate that the system is still
  1514. operational. This is mainly useful to kernel hackers who are
  1515. debugging unstable kernels.
  1516. The LART uses the same LED for both Timer LED and CPU usage LED
  1517. functions. You may choose to use both, but the Timer LED function
  1518. will overrule the CPU usage LED.
  1519. config LEDS_CPU
  1520. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1521. !ARCH_OMAP) \
  1522. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1523. || MACH_OMAP_PERSEUS2
  1524. depends on LEDS
  1525. help
  1526. If you say Y here, the red LED will be used to give a good real
  1527. time indication of CPU usage, by lighting whenever the idle task
  1528. is not currently executing.
  1529. The LART uses the same LED for both Timer LED and CPU usage LED
  1530. functions. You may choose to use both, but the Timer LED function
  1531. will overrule the CPU usage LED.
  1532. config ALIGNMENT_TRAP
  1533. bool
  1534. depends on CPU_CP15_MMU
  1535. default y if !ARCH_EBSA110
  1536. select HAVE_PROC_CPU if PROC_FS
  1537. help
  1538. ARM processors cannot fetch/store information which is not
  1539. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1540. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1541. fetch/store instructions will be emulated in software if you say
  1542. here, which has a severe performance impact. This is necessary for
  1543. correct operation of some network protocols. With an IP-only
  1544. configuration it is safe to say N, otherwise say Y.
  1545. config UACCESS_WITH_MEMCPY
  1546. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1547. depends on MMU && EXPERIMENTAL
  1548. default y if CPU_FEROCEON
  1549. help
  1550. Implement faster copy_to_user and clear_user methods for CPU
  1551. cores where a 8-word STM instruction give significantly higher
  1552. memory write throughput than a sequence of individual 32bit stores.
  1553. A possible side effect is a slight increase in scheduling latency
  1554. between threads sharing the same address space if they invoke
  1555. such copy operations with large buffers.
  1556. However, if the CPU data cache is using a write-allocate mode,
  1557. this option is unlikely to provide any performance gain.
  1558. config SECCOMP
  1559. bool
  1560. prompt "Enable seccomp to safely compute untrusted bytecode"
  1561. ---help---
  1562. This kernel feature is useful for number crunching applications
  1563. that may need to compute untrusted bytecode during their
  1564. execution. By using pipes or other transports made available to
  1565. the process as file descriptors supporting the read/write
  1566. syscalls, it's possible to isolate those applications in
  1567. their own address space using seccomp. Once seccomp is
  1568. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1569. and the task is only allowed to execute a few safe syscalls
  1570. defined by each seccomp mode.
  1571. config CC_STACKPROTECTOR
  1572. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1573. depends on EXPERIMENTAL
  1574. help
  1575. This option turns on the -fstack-protector GCC feature. This
  1576. feature puts, at the beginning of functions, a canary value on
  1577. the stack just before the return address, and validates
  1578. the value just before actually returning. Stack based buffer
  1579. overflows (that need to overwrite this return address) now also
  1580. overwrite the canary, which gets detected and the attack is then
  1581. neutralized via a kernel panic.
  1582. This feature requires gcc version 4.2 or above.
  1583. config DEPRECATED_PARAM_STRUCT
  1584. bool "Provide old way to pass kernel parameters"
  1585. help
  1586. This was deprecated in 2001 and announced to live on for 5 years.
  1587. Some old boot loaders still use this way.
  1588. endmenu
  1589. menu "Boot options"
  1590. config USE_OF
  1591. bool "Flattened Device Tree support"
  1592. select OF
  1593. select OF_EARLY_FLATTREE
  1594. select IRQ_DOMAIN
  1595. help
  1596. Include support for flattened device tree machine descriptions.
  1597. # Compressed boot loader in ROM. Yes, we really want to ask about
  1598. # TEXT and BSS so we preserve their values in the config files.
  1599. config ZBOOT_ROM_TEXT
  1600. hex "Compressed ROM boot loader base address"
  1601. default "0"
  1602. help
  1603. The physical address at which the ROM-able zImage is to be
  1604. placed in the target. Platforms which normally make use of
  1605. ROM-able zImage formats normally set this to a suitable
  1606. value in their defconfig file.
  1607. If ZBOOT_ROM is not enabled, this has no effect.
  1608. config ZBOOT_ROM_BSS
  1609. hex "Compressed ROM boot loader BSS address"
  1610. default "0"
  1611. help
  1612. The base address of an area of read/write memory in the target
  1613. for the ROM-able zImage which must be available while the
  1614. decompressor is running. It must be large enough to hold the
  1615. entire decompressed kernel plus an additional 128 KiB.
  1616. Platforms which normally make use of ROM-able zImage formats
  1617. normally set this to a suitable value in their defconfig file.
  1618. If ZBOOT_ROM is not enabled, this has no effect.
  1619. config ZBOOT_ROM
  1620. bool "Compressed boot loader in ROM/flash"
  1621. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1622. help
  1623. Say Y here if you intend to execute your compressed kernel image
  1624. (zImage) directly from ROM or flash. If unsure, say N.
  1625. choice
  1626. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1627. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1628. default ZBOOT_ROM_NONE
  1629. help
  1630. Include experimental SD/MMC loading code in the ROM-able zImage.
  1631. With this enabled it is possible to write the the ROM-able zImage
  1632. kernel image to an MMC or SD card and boot the kernel straight
  1633. from the reset vector. At reset the processor Mask ROM will load
  1634. the first part of the the ROM-able zImage which in turn loads the
  1635. rest the kernel image to RAM.
  1636. config ZBOOT_ROM_NONE
  1637. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1638. help
  1639. Do not load image from SD or MMC
  1640. config ZBOOT_ROM_MMCIF
  1641. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1642. help
  1643. Load image from MMCIF hardware block.
  1644. config ZBOOT_ROM_SH_MOBILE_SDHI
  1645. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1646. help
  1647. Load image from SDHI hardware block
  1648. endchoice
  1649. config ARM_APPENDED_DTB
  1650. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1651. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1652. help
  1653. With this option, the boot code will look for a device tree binary
  1654. (DTB) appended to zImage
  1655. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1656. This is meant as a backward compatibility convenience for those
  1657. systems with a bootloader that can't be upgraded to accommodate
  1658. the documented boot protocol using a device tree.
  1659. Beware that there is very little in terms of protection against
  1660. this option being confused by leftover garbage in memory that might
  1661. look like a DTB header after a reboot if no actual DTB is appended
  1662. to zImage. Do not leave this option active in a production kernel
  1663. if you don't intend to always append a DTB. Proper passing of the
  1664. location into r2 of a bootloader provided DTB is always preferable
  1665. to this option.
  1666. config ARM_ATAG_DTB_COMPAT
  1667. bool "Supplement the appended DTB with traditional ATAG information"
  1668. depends on ARM_APPENDED_DTB
  1669. help
  1670. Some old bootloaders can't be updated to a DTB capable one, yet
  1671. they provide ATAGs with memory configuration, the ramdisk address,
  1672. the kernel cmdline string, etc. Such information is dynamically
  1673. provided by the bootloader and can't always be stored in a static
  1674. DTB. To allow a device tree enabled kernel to be used with such
  1675. bootloaders, this option allows zImage to extract the information
  1676. from the ATAG list and store it at run time into the appended DTB.
  1677. config CMDLINE
  1678. string "Default kernel command string"
  1679. default ""
  1680. help
  1681. On some architectures (EBSA110 and CATS), there is currently no way
  1682. for the boot loader to pass arguments to the kernel. For these
  1683. architectures, you should supply some command-line options at build
  1684. time by entering them here. As a minimum, you should specify the
  1685. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1686. choice
  1687. prompt "Kernel command line type" if CMDLINE != ""
  1688. default CMDLINE_FROM_BOOTLOADER
  1689. config CMDLINE_FROM_BOOTLOADER
  1690. bool "Use bootloader kernel arguments if available"
  1691. help
  1692. Uses the command-line options passed by the boot loader. If
  1693. the boot loader doesn't provide any, the default kernel command
  1694. string provided in CMDLINE will be used.
  1695. config CMDLINE_EXTEND
  1696. bool "Extend bootloader kernel arguments"
  1697. help
  1698. The command-line arguments provided by the boot loader will be
  1699. appended to the default kernel command string.
  1700. config CMDLINE_FORCE
  1701. bool "Always use the default kernel command string"
  1702. help
  1703. Always use the default kernel command string, even if the boot
  1704. loader passes other arguments to the kernel.
  1705. This is useful if you cannot or don't want to change the
  1706. command-line options your boot loader passes to the kernel.
  1707. endchoice
  1708. config XIP_KERNEL
  1709. bool "Kernel Execute-In-Place from ROM"
  1710. depends on !ZBOOT_ROM && !ARM_LPAE
  1711. help
  1712. Execute-In-Place allows the kernel to run from non-volatile storage
  1713. directly addressable by the CPU, such as NOR flash. This saves RAM
  1714. space since the text section of the kernel is not loaded from flash
  1715. to RAM. Read-write sections, such as the data section and stack,
  1716. are still copied to RAM. The XIP kernel is not compressed since
  1717. it has to run directly from flash, so it will take more space to
  1718. store it. The flash address used to link the kernel object files,
  1719. and for storing it, is configuration dependent. Therefore, if you
  1720. say Y here, you must know the proper physical address where to
  1721. store the kernel image depending on your own flash memory usage.
  1722. Also note that the make target becomes "make xipImage" rather than
  1723. "make zImage" or "make Image". The final kernel binary to put in
  1724. ROM memory will be arch/arm/boot/xipImage.
  1725. If unsure, say N.
  1726. config XIP_PHYS_ADDR
  1727. hex "XIP Kernel Physical Location"
  1728. depends on XIP_KERNEL
  1729. default "0x00080000"
  1730. help
  1731. This is the physical address in your flash memory the kernel will
  1732. be linked for and stored to. This address is dependent on your
  1733. own flash usage.
  1734. config KEXEC
  1735. bool "Kexec system call (EXPERIMENTAL)"
  1736. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1737. help
  1738. kexec is a system call that implements the ability to shutdown your
  1739. current kernel, and to start another kernel. It is like a reboot
  1740. but it is independent of the system firmware. And like a reboot
  1741. you can start any kernel with it, not just Linux.
  1742. It is an ongoing process to be certain the hardware in a machine
  1743. is properly shutdown, so do not be surprised if this code does not
  1744. initially work for you. It may help to enable device hotplugging
  1745. support.
  1746. config ATAGS_PROC
  1747. bool "Export atags in procfs"
  1748. depends on KEXEC
  1749. default y
  1750. help
  1751. Should the atags used to boot the kernel be exported in an "atags"
  1752. file in procfs. Useful with kexec.
  1753. config CRASH_DUMP
  1754. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1755. depends on EXPERIMENTAL
  1756. help
  1757. Generate crash dump after being started by kexec. This should
  1758. be normally only set in special crash dump kernels which are
  1759. loaded in the main kernel with kexec-tools into a specially
  1760. reserved region and then later executed after a crash by
  1761. kdump/kexec. The crash dump kernel must be compiled to a
  1762. memory address not used by the main kernel
  1763. For more details see Documentation/kdump/kdump.txt
  1764. config AUTO_ZRELADDR
  1765. bool "Auto calculation of the decompressed kernel image address"
  1766. depends on !ZBOOT_ROM && !ARCH_U300
  1767. help
  1768. ZRELADDR is the physical address where the decompressed kernel
  1769. image will be placed. If AUTO_ZRELADDR is selected, the address
  1770. will be determined at run-time by masking the current IP with
  1771. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1772. from start of memory.
  1773. endmenu
  1774. menu "CPU Power Management"
  1775. if ARCH_HAS_CPUFREQ
  1776. source "drivers/cpufreq/Kconfig"
  1777. config CPU_FREQ_IMX
  1778. tristate "CPUfreq driver for i.MX CPUs"
  1779. depends on ARCH_MXC && CPU_FREQ
  1780. help
  1781. This enables the CPUfreq driver for i.MX CPUs.
  1782. config CPU_FREQ_SA1100
  1783. bool
  1784. config CPU_FREQ_SA1110
  1785. bool
  1786. config CPU_FREQ_INTEGRATOR
  1787. tristate "CPUfreq driver for ARM Integrator CPUs"
  1788. depends on ARCH_INTEGRATOR && CPU_FREQ
  1789. default y
  1790. help
  1791. This enables the CPUfreq driver for ARM Integrator CPUs.
  1792. For details, take a look at <file:Documentation/cpu-freq>.
  1793. If in doubt, say Y.
  1794. config CPU_FREQ_PXA
  1795. bool
  1796. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1797. default y
  1798. select CPU_FREQ_TABLE
  1799. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1800. config CPU_FREQ_S3C
  1801. bool
  1802. help
  1803. Internal configuration node for common cpufreq on Samsung SoC
  1804. config CPU_FREQ_S3C24XX
  1805. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1806. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1807. select CPU_FREQ_S3C
  1808. help
  1809. This enables the CPUfreq driver for the Samsung S3C24XX family
  1810. of CPUs.
  1811. For details, take a look at <file:Documentation/cpu-freq>.
  1812. If in doubt, say N.
  1813. config CPU_FREQ_S3C24XX_PLL
  1814. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1815. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1816. help
  1817. Compile in support for changing the PLL frequency from the
  1818. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1819. after a frequency change, so by default it is not enabled.
  1820. This also means that the PLL tables for the selected CPU(s) will
  1821. be built which may increase the size of the kernel image.
  1822. config CPU_FREQ_S3C24XX_DEBUG
  1823. bool "Debug CPUfreq Samsung driver core"
  1824. depends on CPU_FREQ_S3C24XX
  1825. help
  1826. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1827. config CPU_FREQ_S3C24XX_IODEBUG
  1828. bool "Debug CPUfreq Samsung driver IO timing"
  1829. depends on CPU_FREQ_S3C24XX
  1830. help
  1831. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1832. config CPU_FREQ_S3C24XX_DEBUGFS
  1833. bool "Export debugfs for CPUFreq"
  1834. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1835. help
  1836. Export status information via debugfs.
  1837. endif
  1838. source "drivers/cpuidle/Kconfig"
  1839. endmenu
  1840. menu "Floating point emulation"
  1841. comment "At least one emulation must be selected"
  1842. config FPE_NWFPE
  1843. bool "NWFPE math emulation"
  1844. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1845. ---help---
  1846. Say Y to include the NWFPE floating point emulator in the kernel.
  1847. This is necessary to run most binaries. Linux does not currently
  1848. support floating point hardware so you need to say Y here even if
  1849. your machine has an FPA or floating point co-processor podule.
  1850. You may say N here if you are going to load the Acorn FPEmulator
  1851. early in the bootup.
  1852. config FPE_NWFPE_XP
  1853. bool "Support extended precision"
  1854. depends on FPE_NWFPE
  1855. help
  1856. Say Y to include 80-bit support in the kernel floating-point
  1857. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1858. Note that gcc does not generate 80-bit operations by default,
  1859. so in most cases this option only enlarges the size of the
  1860. floating point emulator without any good reason.
  1861. You almost surely want to say N here.
  1862. config FPE_FASTFPE
  1863. bool "FastFPE math emulation (EXPERIMENTAL)"
  1864. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1865. ---help---
  1866. Say Y here to include the FAST floating point emulator in the kernel.
  1867. This is an experimental much faster emulator which now also has full
  1868. precision for the mantissa. It does not support any exceptions.
  1869. It is very simple, and approximately 3-6 times faster than NWFPE.
  1870. It should be sufficient for most programs. It may be not suitable
  1871. for scientific calculations, but you have to check this for yourself.
  1872. If you do not feel you need a faster FP emulation you should better
  1873. choose NWFPE.
  1874. config VFP
  1875. bool "VFP-format floating point maths"
  1876. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1877. help
  1878. Say Y to include VFP support code in the kernel. This is needed
  1879. if your hardware includes a VFP unit.
  1880. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1881. release notes and additional status information.
  1882. Say N if your target does not have VFP hardware.
  1883. config VFPv3
  1884. bool
  1885. depends on VFP
  1886. default y if CPU_V7
  1887. config NEON
  1888. bool "Advanced SIMD (NEON) Extension support"
  1889. depends on VFPv3 && CPU_V7
  1890. help
  1891. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1892. Extension.
  1893. endmenu
  1894. menu "Userspace binary formats"
  1895. source "fs/Kconfig.binfmt"
  1896. config ARTHUR
  1897. tristate "RISC OS personality"
  1898. depends on !AEABI
  1899. help
  1900. Say Y here to include the kernel code necessary if you want to run
  1901. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1902. experimental; if this sounds frightening, say N and sleep in peace.
  1903. You can also say M here to compile this support as a module (which
  1904. will be called arthur).
  1905. endmenu
  1906. menu "Power management options"
  1907. source "kernel/power/Kconfig"
  1908. config ARCH_SUSPEND_POSSIBLE
  1909. depends on !ARCH_S5PC100
  1910. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1911. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1912. def_bool y
  1913. config ARM_CPU_SUSPEND
  1914. def_bool PM_SLEEP
  1915. endmenu
  1916. source "net/Kconfig"
  1917. source "drivers/Kconfig"
  1918. source "fs/Kconfig"
  1919. source "arch/arm/Kconfig.debug"
  1920. source "security/Kconfig"
  1921. source "crypto/Kconfig"
  1922. source "lib/Kconfig"