Kconfig 40 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361136213631364136513661367136813691370137113721373137413751376137713781379138013811382138313841385138613871388138913901391139213931394139513961397139813991400140114021403140414051406140714081409141014111412141314141415141614171418141914201421142214231424142514261427142814291430143114321433143414351436143714381439144014411442144314441445144614471448144914501451145214531454145514561457145814591460146114621463146414651466146714681469147014711472147314741475147614771478147914801481148214831484148514861487148814891490149114921493149414951496149714981499150015011502150315041505150615071508150915101511151215131514151515161517151815191520152115221523152415251526152715281529153015311532153315341535153615371538153915401541154215431544154515461547154815491550155115521553155415551556155715581559156015611562156315641565156615671568156915701571
  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see Documentation/kbuild/kconfig-language.txt.
  4. #
  5. mainmenu "Linux Kernel Configuration"
  6. config ARM
  7. bool
  8. default y
  9. select HAVE_AOUT
  10. select HAVE_IDE
  11. select RTC_LIB
  12. select SYS_SUPPORTS_APM_EMULATION
  13. select HAVE_OPROFILE
  14. select HAVE_ARCH_KGDB
  15. select HAVE_KPROBES if (!XIP_KERNEL)
  16. select HAVE_KRETPROBES if (HAVE_KPROBES)
  17. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  18. select HAVE_GENERIC_DMA_COHERENT
  19. select HAVE_KERNEL_GZIP
  20. select HAVE_KERNEL_LZO
  21. help
  22. The ARM series is a line of low-power-consumption RISC chip designs
  23. licensed by ARM Ltd and targeted at embedded applications and
  24. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  25. manufactured, but legacy ARM-based PC hardware remains popular in
  26. Europe. There is an ARM Linux project with a web page at
  27. <http://www.arm.linux.org.uk/>.
  28. config HAVE_PWM
  29. bool
  30. config SYS_SUPPORTS_APM_EMULATION
  31. bool
  32. config GENERIC_GPIO
  33. bool
  34. config GENERIC_TIME
  35. bool
  36. config GENERIC_CLOCKEVENTS
  37. bool
  38. config GENERIC_CLOCKEVENTS_BROADCAST
  39. bool
  40. depends on GENERIC_CLOCKEVENTS
  41. default y if SMP && !LOCAL_TIMERS
  42. config HAVE_TCM
  43. bool
  44. select GENERIC_ALLOCATOR
  45. config NO_IOPORT
  46. bool
  47. config EISA
  48. bool
  49. ---help---
  50. The Extended Industry Standard Architecture (EISA) bus was
  51. developed as an open alternative to the IBM MicroChannel bus.
  52. The EISA bus provided some of the features of the IBM MicroChannel
  53. bus while maintaining backward compatibility with cards made for
  54. the older ISA bus. The EISA bus saw limited use between 1988 and
  55. 1995 when it was made obsolete by the PCI bus.
  56. Say Y here if you are building a kernel for an EISA-based machine.
  57. Otherwise, say N.
  58. config SBUS
  59. bool
  60. config MCA
  61. bool
  62. help
  63. MicroChannel Architecture is found in some IBM PS/2 machines and
  64. laptops. It is a bus system similar to PCI or ISA. See
  65. <file:Documentation/mca.txt> (and especially the web page given
  66. there) before attempting to build an MCA bus kernel.
  67. config GENERIC_HARDIRQS
  68. bool
  69. default y
  70. config STACKTRACE_SUPPORT
  71. bool
  72. default y
  73. config HAVE_LATENCYTOP_SUPPORT
  74. bool
  75. depends on !SMP
  76. default y
  77. config LOCKDEP_SUPPORT
  78. bool
  79. default y
  80. config TRACE_IRQFLAGS_SUPPORT
  81. bool
  82. default y
  83. config HARDIRQS_SW_RESEND
  84. bool
  85. default y
  86. config GENERIC_IRQ_PROBE
  87. bool
  88. default y
  89. config GENERIC_LOCKBREAK
  90. bool
  91. default y
  92. depends on SMP && PREEMPT
  93. config RWSEM_GENERIC_SPINLOCK
  94. bool
  95. default y
  96. config RWSEM_XCHGADD_ALGORITHM
  97. bool
  98. config ARCH_HAS_ILOG2_U32
  99. bool
  100. config ARCH_HAS_ILOG2_U64
  101. bool
  102. config ARCH_HAS_CPUFREQ
  103. bool
  104. help
  105. Internal node to signify that the ARCH has CPUFREQ support
  106. and that the relevant menu configurations are displayed for
  107. it.
  108. config GENERIC_HWEIGHT
  109. bool
  110. default y
  111. config GENERIC_CALIBRATE_DELAY
  112. bool
  113. default y
  114. config ARCH_MAY_HAVE_PC_FDC
  115. bool
  116. config ZONE_DMA
  117. bool
  118. config GENERIC_ISA_DMA
  119. bool
  120. config FIQ
  121. bool
  122. config ARCH_MTD_XIP
  123. bool
  124. config GENERIC_HARDIRQS_NO__DO_IRQ
  125. def_bool y
  126. if OPROFILE
  127. config OPROFILE_ARMV6
  128. def_bool y
  129. depends on CPU_V6 && !SMP
  130. select OPROFILE_ARM11_CORE
  131. config OPROFILE_MPCORE
  132. def_bool y
  133. depends on CPU_V6 && SMP
  134. select OPROFILE_ARM11_CORE
  135. config OPROFILE_ARM11_CORE
  136. bool
  137. config OPROFILE_ARMV7
  138. def_bool y
  139. depends on CPU_V7 && !SMP
  140. bool
  141. endif
  142. config VECTORS_BASE
  143. hex
  144. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  145. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  146. default 0x00000000
  147. help
  148. The base address of exception vectors.
  149. source "init/Kconfig"
  150. source "kernel/Kconfig.freezer"
  151. menu "System Type"
  152. config MMU
  153. bool "MMU-based Paged Memory Management Support"
  154. default y
  155. help
  156. Select if you want MMU-based virtualised addressing space
  157. support by paged memory management. If unsure, say 'Y'.
  158. choice
  159. prompt "ARM system type"
  160. default ARCH_VERSATILE
  161. config ARCH_AAEC2000
  162. bool "Agilent AAEC-2000 based"
  163. select CPU_ARM920T
  164. select ARM_AMBA
  165. select HAVE_CLK
  166. help
  167. This enables support for systems based on the Agilent AAEC-2000
  168. config ARCH_INTEGRATOR
  169. bool "ARM Ltd. Integrator family"
  170. select ARM_AMBA
  171. select ARCH_HAS_CPUFREQ
  172. select HAVE_CLK
  173. select COMMON_CLKDEV
  174. select ICST525
  175. help
  176. Support for ARM's Integrator platform.
  177. config ARCH_REALVIEW
  178. bool "ARM Ltd. RealView family"
  179. select ARM_AMBA
  180. select HAVE_CLK
  181. select COMMON_CLKDEV
  182. select ICST307
  183. select GENERIC_TIME
  184. select GENERIC_CLOCKEVENTS
  185. select ARCH_WANT_OPTIONAL_GPIOLIB
  186. help
  187. This enables support for ARM Ltd RealView boards.
  188. config ARCH_VERSATILE
  189. bool "ARM Ltd. Versatile family"
  190. select ARM_AMBA
  191. select ARM_VIC
  192. select HAVE_CLK
  193. select COMMON_CLKDEV
  194. select ICST307
  195. select GENERIC_TIME
  196. select GENERIC_CLOCKEVENTS
  197. select ARCH_WANT_OPTIONAL_GPIOLIB
  198. help
  199. This enables support for ARM Ltd Versatile board.
  200. config ARCH_AT91
  201. bool "Atmel AT91"
  202. select GENERIC_GPIO
  203. select ARCH_REQUIRE_GPIOLIB
  204. select HAVE_CLK
  205. help
  206. This enables support for systems based on the Atmel AT91RM9200,
  207. AT91SAM9 and AT91CAP9 processors.
  208. config ARCH_CLPS711X
  209. bool "Cirrus Logic CLPS711x/EP721x-based"
  210. select CPU_ARM720T
  211. help
  212. Support for Cirrus Logic 711x/721x based boards.
  213. config ARCH_GEMINI
  214. bool "Cortina Systems Gemini"
  215. select CPU_FA526
  216. select GENERIC_GPIO
  217. select ARCH_REQUIRE_GPIOLIB
  218. help
  219. Support for the Cortina Systems Gemini family SoCs
  220. config ARCH_EBSA110
  221. bool "EBSA-110"
  222. select CPU_SA110
  223. select ISA
  224. select NO_IOPORT
  225. help
  226. This is an evaluation board for the StrongARM processor available
  227. from Digital. It has limited hardware on-board, including an
  228. Ethernet interface, two PCMCIA sockets, two serial ports and a
  229. parallel port.
  230. config ARCH_EP93XX
  231. bool "EP93xx-based"
  232. select CPU_ARM920T
  233. select ARM_AMBA
  234. select ARM_VIC
  235. select GENERIC_GPIO
  236. select HAVE_CLK
  237. select COMMON_CLKDEV
  238. select ARCH_REQUIRE_GPIOLIB
  239. select ARCH_HAS_HOLES_MEMORYMODEL
  240. help
  241. This enables support for the Cirrus EP93xx series of CPUs.
  242. config ARCH_FOOTBRIDGE
  243. bool "FootBridge"
  244. select CPU_SA110
  245. select FOOTBRIDGE
  246. help
  247. Support for systems based on the DC21285 companion chip
  248. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  249. config ARCH_MXC
  250. bool "Freescale MXC/iMX-based"
  251. select GENERIC_TIME
  252. select GENERIC_CLOCKEVENTS
  253. select ARCH_MTD_XIP
  254. select GENERIC_GPIO
  255. select ARCH_REQUIRE_GPIOLIB
  256. select HAVE_CLK
  257. help
  258. Support for Freescale MXC/iMX-based family of processors
  259. config ARCH_STMP3XXX
  260. bool "Freescale STMP3xxx"
  261. select CPU_ARM926T
  262. select HAVE_CLK
  263. select COMMON_CLKDEV
  264. select ARCH_REQUIRE_GPIOLIB
  265. select GENERIC_TIME
  266. select GENERIC_CLOCKEVENTS
  267. select GENERIC_GPIO
  268. select USB_ARCH_HAS_EHCI
  269. help
  270. Support for systems based on the Freescale 3xxx CPUs.
  271. config ARCH_NETX
  272. bool "Hilscher NetX based"
  273. select CPU_ARM926T
  274. select ARM_VIC
  275. select GENERIC_CLOCKEVENTS
  276. select GENERIC_TIME
  277. help
  278. This enables support for systems based on the Hilscher NetX Soc
  279. config ARCH_H720X
  280. bool "Hynix HMS720x-based"
  281. select CPU_ARM720T
  282. select ISA_DMA_API
  283. help
  284. This enables support for systems based on the Hynix HMS720x
  285. config ARCH_NOMADIK
  286. bool "STMicroelectronics Nomadik"
  287. select ARM_AMBA
  288. select ARM_VIC
  289. select CPU_ARM926T
  290. select HAVE_CLK
  291. select COMMON_CLKDEV
  292. select GENERIC_TIME
  293. select GENERIC_CLOCKEVENTS
  294. select GENERIC_GPIO
  295. select ARCH_REQUIRE_GPIOLIB
  296. help
  297. Support for the Nomadik platform by ST-Ericsson
  298. config ARCH_IOP13XX
  299. bool "IOP13xx-based"
  300. depends on MMU
  301. select CPU_XSC3
  302. select PLAT_IOP
  303. select PCI
  304. select ARCH_SUPPORTS_MSI
  305. select VMSPLIT_1G
  306. help
  307. Support for Intel's IOP13XX (XScale) family of processors.
  308. config ARCH_IOP32X
  309. bool "IOP32x-based"
  310. depends on MMU
  311. select CPU_XSCALE
  312. select PLAT_IOP
  313. select PCI
  314. select GENERIC_GPIO
  315. select ARCH_REQUIRE_GPIOLIB
  316. help
  317. Support for Intel's 80219 and IOP32X (XScale) family of
  318. processors.
  319. config ARCH_IOP33X
  320. bool "IOP33x-based"
  321. depends on MMU
  322. select CPU_XSCALE
  323. select PLAT_IOP
  324. select PCI
  325. select GENERIC_GPIO
  326. select ARCH_REQUIRE_GPIOLIB
  327. help
  328. Support for Intel's IOP33X (XScale) family of processors.
  329. config ARCH_IXP23XX
  330. bool "IXP23XX-based"
  331. depends on MMU
  332. select CPU_XSC3
  333. select PCI
  334. help
  335. Support for Intel's IXP23xx (XScale) family of processors.
  336. config ARCH_IXP2000
  337. bool "IXP2400/2800-based"
  338. depends on MMU
  339. select CPU_XSCALE
  340. select PCI
  341. help
  342. Support for Intel's IXP2400/2800 (XScale) family of processors.
  343. config ARCH_IXP4XX
  344. bool "IXP4xx-based"
  345. depends on MMU
  346. select CPU_XSCALE
  347. select GENERIC_GPIO
  348. select GENERIC_TIME
  349. select GENERIC_CLOCKEVENTS
  350. select DMABOUNCE if PCI
  351. help
  352. Support for Intel's IXP4XX (XScale) family of processors.
  353. config ARCH_L7200
  354. bool "LinkUp-L7200"
  355. select CPU_ARM720T
  356. select FIQ
  357. help
  358. Say Y here if you intend to run this kernel on a LinkUp Systems
  359. L7200 Software Development Board which uses an ARM720T processor.
  360. Information on this board can be obtained at:
  361. <http://www.linkupsys.com/>
  362. If you have any questions or comments about the Linux kernel port
  363. to this board, send e-mail to <sjhill@cotw.com>.
  364. config ARCH_DOVE
  365. bool "Marvell Dove"
  366. select PCI
  367. select GENERIC_GPIO
  368. select ARCH_REQUIRE_GPIOLIB
  369. select GENERIC_TIME
  370. select GENERIC_CLOCKEVENTS
  371. select PLAT_ORION
  372. help
  373. Support for the Marvell Dove SoC 88AP510
  374. config ARCH_KIRKWOOD
  375. bool "Marvell Kirkwood"
  376. select CPU_FEROCEON
  377. select PCI
  378. select GENERIC_GPIO
  379. select ARCH_REQUIRE_GPIOLIB
  380. select GENERIC_TIME
  381. select GENERIC_CLOCKEVENTS
  382. select PLAT_ORION
  383. help
  384. Support for the following Marvell Kirkwood series SoCs:
  385. 88F6180, 88F6192 and 88F6281.
  386. config ARCH_LOKI
  387. bool "Marvell Loki (88RC8480)"
  388. select CPU_FEROCEON
  389. select GENERIC_TIME
  390. select GENERIC_CLOCKEVENTS
  391. select PLAT_ORION
  392. help
  393. Support for the Marvell Loki (88RC8480) SoC.
  394. config ARCH_MV78XX0
  395. bool "Marvell MV78xx0"
  396. select CPU_FEROCEON
  397. select PCI
  398. select GENERIC_GPIO
  399. select ARCH_REQUIRE_GPIOLIB
  400. select GENERIC_TIME
  401. select GENERIC_CLOCKEVENTS
  402. select PLAT_ORION
  403. help
  404. Support for the following Marvell MV78xx0 series SoCs:
  405. MV781x0, MV782x0.
  406. config ARCH_ORION5X
  407. bool "Marvell Orion"
  408. depends on MMU
  409. select CPU_FEROCEON
  410. select PCI
  411. select GENERIC_GPIO
  412. select ARCH_REQUIRE_GPIOLIB
  413. select GENERIC_TIME
  414. select GENERIC_CLOCKEVENTS
  415. select PLAT_ORION
  416. help
  417. Support for the following Marvell Orion 5x series SoCs:
  418. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  419. Orion-2 (5281), Orion-1-90 (6183).
  420. config ARCH_MMP
  421. bool "Marvell PXA168/910"
  422. depends on MMU
  423. select GENERIC_GPIO
  424. select ARCH_REQUIRE_GPIOLIB
  425. select HAVE_CLK
  426. select COMMON_CLKDEV
  427. select GENERIC_TIME
  428. select GENERIC_CLOCKEVENTS
  429. select TICK_ONESHOT
  430. select PLAT_PXA
  431. help
  432. Support for Marvell's PXA168/910 processor line.
  433. config ARCH_KS8695
  434. bool "Micrel/Kendin KS8695"
  435. select CPU_ARM922T
  436. select GENERIC_GPIO
  437. select ARCH_REQUIRE_GPIOLIB
  438. help
  439. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  440. System-on-Chip devices.
  441. config ARCH_NS9XXX
  442. bool "NetSilicon NS9xxx"
  443. select CPU_ARM926T
  444. select GENERIC_GPIO
  445. select GENERIC_TIME
  446. select GENERIC_CLOCKEVENTS
  447. select HAVE_CLK
  448. help
  449. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  450. System.
  451. <http://www.digi.com/products/microprocessors/index.jsp>
  452. config ARCH_W90X900
  453. bool "Nuvoton W90X900 CPU"
  454. select CPU_ARM926T
  455. select ARCH_REQUIRE_GPIOLIB
  456. select GENERIC_GPIO
  457. select HAVE_CLK
  458. select COMMON_CLKDEV
  459. select GENERIC_TIME
  460. select GENERIC_CLOCKEVENTS
  461. help
  462. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  463. At present, the w90x900 has been renamed nuc900, regarding
  464. the ARM series product line, you can login the following
  465. link address to know more.
  466. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  467. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  468. config ARCH_PNX4008
  469. bool "Philips Nexperia PNX4008 Mobile"
  470. select CPU_ARM926T
  471. select HAVE_CLK
  472. help
  473. This enables support for Philips PNX4008 mobile platform.
  474. config ARCH_PXA
  475. bool "PXA2xx/PXA3xx-based"
  476. depends on MMU
  477. select ARCH_MTD_XIP
  478. select ARCH_HAS_CPUFREQ
  479. select GENERIC_GPIO
  480. select HAVE_CLK
  481. select COMMON_CLKDEV
  482. select ARCH_REQUIRE_GPIOLIB
  483. select GENERIC_TIME
  484. select GENERIC_CLOCKEVENTS
  485. select TICK_ONESHOT
  486. select PLAT_PXA
  487. help
  488. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  489. config ARCH_MSM
  490. bool "Qualcomm MSM"
  491. select CPU_V6
  492. select GENERIC_TIME
  493. select GENERIC_CLOCKEVENTS
  494. help
  495. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  496. apps processor of the MSM7K and depends on a shared memory
  497. interface to the ARM9 modem processor which runs the baseband stack
  498. and controls some vital subsystems (clock and power control, etc).
  499. config ARCH_RPC
  500. bool "RiscPC"
  501. select ARCH_ACORN
  502. select FIQ
  503. select TIMER_ACORN
  504. select ARCH_MAY_HAVE_PC_FDC
  505. select HAVE_PATA_PLATFORM
  506. select ISA_DMA_API
  507. select NO_IOPORT
  508. select ARCH_SPARSEMEM_ENABLE
  509. help
  510. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  511. CD-ROM interface, serial and parallel port, and the floppy drive.
  512. config ARCH_SA1100
  513. bool "SA1100-based"
  514. select CPU_SA1100
  515. select ISA
  516. select ARCH_SPARSEMEM_ENABLE
  517. select ARCH_MTD_XIP
  518. select ARCH_HAS_CPUFREQ
  519. select CPU_FREQ
  520. select GENERIC_GPIO
  521. select GENERIC_TIME
  522. select GENERIC_CLOCKEVENTS
  523. select HAVE_CLK
  524. select TICK_ONESHOT
  525. select ARCH_REQUIRE_GPIOLIB
  526. help
  527. Support for StrongARM 11x0 based boards.
  528. config ARCH_S3C2410
  529. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  530. select GENERIC_GPIO
  531. select ARCH_HAS_CPUFREQ
  532. select HAVE_CLK
  533. help
  534. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  535. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  536. the Samsung SMDK2410 development board (and derivatives).
  537. config ARCH_S3C64XX
  538. bool "Samsung S3C64XX"
  539. select PLAT_SAMSUNG
  540. select CPU_V6
  541. select GENERIC_GPIO
  542. select ARM_VIC
  543. select HAVE_CLK
  544. select NO_IOPORT
  545. select ARCH_HAS_CPUFREQ
  546. select ARCH_REQUIRE_GPIOLIB
  547. select SAMSUNG_CLKSRC
  548. select SAMSUNG_IRQ_VIC_TIMER
  549. select SAMSUNG_IRQ_UART
  550. select S3C_GPIO_TRACK
  551. select S3C_GPIO_PULL_UPDOWN
  552. select S3C_GPIO_CFG_S3C24XX
  553. select S3C_GPIO_CFG_S3C64XX
  554. select S3C_DEV_NAND
  555. select USB_ARCH_HAS_OHCI
  556. select SAMSUNG_GPIOLIB_4BIT
  557. help
  558. Samsung S3C64XX series based systems
  559. config ARCH_S5P6440
  560. bool "Samsung S5P6440"
  561. select CPU_V6
  562. select GENERIC_GPIO
  563. select HAVE_CLK
  564. help
  565. Samsung S5P6440 CPU based systems
  566. config ARCH_S5PC1XX
  567. bool "Samsung S5PC1XX"
  568. select GENERIC_GPIO
  569. select HAVE_CLK
  570. select CPU_V7
  571. help
  572. Samsung S5PC1XX series based systems
  573. config ARCH_SHARK
  574. bool "Shark"
  575. select CPU_SA110
  576. select ISA
  577. select ISA_DMA
  578. select ZONE_DMA
  579. select PCI
  580. help
  581. Support for the StrongARM based Digital DNARD machine, also known
  582. as "Shark" (<http://www.shark-linux.de/shark.html>).
  583. config ARCH_LH7A40X
  584. bool "Sharp LH7A40X"
  585. select CPU_ARM922T
  586. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  587. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  588. help
  589. Say Y here for systems based on one of the Sharp LH7A40X
  590. System on a Chip processors. These CPUs include an ARM922T
  591. core with a wide array of integrated devices for
  592. hand-held and low-power applications.
  593. config ARCH_U300
  594. bool "ST-Ericsson U300 Series"
  595. depends on MMU
  596. select CPU_ARM926T
  597. select HAVE_TCM
  598. select ARM_AMBA
  599. select ARM_VIC
  600. select GENERIC_TIME
  601. select GENERIC_CLOCKEVENTS
  602. select HAVE_CLK
  603. select COMMON_CLKDEV
  604. select GENERIC_GPIO
  605. help
  606. Support for ST-Ericsson U300 series mobile platforms.
  607. config ARCH_DAVINCI
  608. bool "TI DaVinci"
  609. select CPU_ARM926T
  610. select GENERIC_TIME
  611. select GENERIC_CLOCKEVENTS
  612. select GENERIC_GPIO
  613. select ARCH_REQUIRE_GPIOLIB
  614. select HAVE_CLK
  615. select ZONE_DMA
  616. select HAVE_IDE
  617. select COMMON_CLKDEV
  618. select GENERIC_ALLOCATOR
  619. select ARCH_HAS_HOLES_MEMORYMODEL
  620. help
  621. Support for TI's DaVinci platform.
  622. config ARCH_OMAP
  623. bool "TI OMAP"
  624. select GENERIC_GPIO
  625. select HAVE_CLK
  626. select ARCH_REQUIRE_GPIOLIB
  627. select ARCH_HAS_CPUFREQ
  628. select GENERIC_TIME
  629. select GENERIC_CLOCKEVENTS
  630. help
  631. Support for TI's OMAP platform (OMAP1 and OMAP2).
  632. config ARCH_BCMRING
  633. bool "Broadcom BCMRING"
  634. depends on MMU
  635. select CPU_V6
  636. select ARM_AMBA
  637. select COMMON_CLKDEV
  638. select GENERIC_TIME
  639. select GENERIC_CLOCKEVENTS
  640. select ARCH_WANT_OPTIONAL_GPIOLIB
  641. help
  642. Support for Broadcom's BCMRing platform.
  643. config ARCH_U8500
  644. bool "ST-Ericsson U8500 Series"
  645. select CPU_V7
  646. select ARM_AMBA
  647. select GENERIC_TIME
  648. select GENERIC_CLOCKEVENTS
  649. select COMMON_CLKDEV
  650. help
  651. Support for ST-Ericsson's Ux500 architecture
  652. endchoice
  653. source "arch/arm/mach-clps711x/Kconfig"
  654. source "arch/arm/mach-ep93xx/Kconfig"
  655. source "arch/arm/mach-footbridge/Kconfig"
  656. source "arch/arm/mach-gemini/Kconfig"
  657. source "arch/arm/mach-integrator/Kconfig"
  658. source "arch/arm/mach-iop32x/Kconfig"
  659. source "arch/arm/mach-iop33x/Kconfig"
  660. source "arch/arm/mach-iop13xx/Kconfig"
  661. source "arch/arm/mach-ixp4xx/Kconfig"
  662. source "arch/arm/mach-ixp2000/Kconfig"
  663. source "arch/arm/mach-ixp23xx/Kconfig"
  664. source "arch/arm/mach-loki/Kconfig"
  665. source "arch/arm/mach-mv78xx0/Kconfig"
  666. source "arch/arm/mach-pxa/Kconfig"
  667. source "arch/arm/plat-pxa/Kconfig"
  668. source "arch/arm/mach-mmp/Kconfig"
  669. source "arch/arm/mach-sa1100/Kconfig"
  670. source "arch/arm/plat-omap/Kconfig"
  671. source "arch/arm/mach-omap1/Kconfig"
  672. source "arch/arm/mach-omap2/Kconfig"
  673. source "arch/arm/mach-orion5x/Kconfig"
  674. source "arch/arm/mach-kirkwood/Kconfig"
  675. source "arch/arm/mach-dove/Kconfig"
  676. source "arch/arm/plat-samsung/Kconfig"
  677. source "arch/arm/plat-s3c24xx/Kconfig"
  678. source "arch/arm/plat-s3c/Kconfig"
  679. source "arch/arm/plat-s5p/Kconfig"
  680. source "arch/arm/plat-s5pc1xx/Kconfig"
  681. if ARCH_S3C2410
  682. source "arch/arm/mach-s3c2400/Kconfig"
  683. source "arch/arm/mach-s3c2410/Kconfig"
  684. source "arch/arm/mach-s3c2412/Kconfig"
  685. source "arch/arm/mach-s3c2440/Kconfig"
  686. source "arch/arm/mach-s3c2443/Kconfig"
  687. endif
  688. if ARCH_S3C64XX
  689. source "arch/arm/mach-s3c64xx/Kconfig"
  690. endif
  691. source "arch/arm/mach-s5p6440/Kconfig"
  692. source "arch/arm/plat-stmp3xxx/Kconfig"
  693. if ARCH_S5PC1XX
  694. source "arch/arm/mach-s5pc100/Kconfig"
  695. endif
  696. source "arch/arm/mach-lh7a40x/Kconfig"
  697. source "arch/arm/mach-h720x/Kconfig"
  698. source "arch/arm/mach-versatile/Kconfig"
  699. source "arch/arm/mach-aaec2000/Kconfig"
  700. source "arch/arm/mach-realview/Kconfig"
  701. source "arch/arm/mach-at91/Kconfig"
  702. source "arch/arm/plat-mxc/Kconfig"
  703. source "arch/arm/mach-nomadik/Kconfig"
  704. source "arch/arm/plat-nomadik/Kconfig"
  705. source "arch/arm/mach-netx/Kconfig"
  706. source "arch/arm/mach-ns9xxx/Kconfig"
  707. source "arch/arm/mach-davinci/Kconfig"
  708. source "arch/arm/mach-ks8695/Kconfig"
  709. source "arch/arm/mach-msm/Kconfig"
  710. source "arch/arm/mach-u300/Kconfig"
  711. source "arch/arm/mach-w90x900/Kconfig"
  712. source "arch/arm/mach-bcmring/Kconfig"
  713. source "arch/arm/mach-ux500/Kconfig"
  714. # Definitions to make life easier
  715. config ARCH_ACORN
  716. bool
  717. config PLAT_IOP
  718. bool
  719. select GENERIC_CLOCKEVENTS
  720. select GENERIC_TIME
  721. config PLAT_ORION
  722. bool
  723. config PLAT_PXA
  724. bool
  725. source arch/arm/mm/Kconfig
  726. config IWMMXT
  727. bool "Enable iWMMXt support"
  728. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  729. default y if PXA27x || PXA3xx || ARCH_MMP
  730. help
  731. Enable support for iWMMXt context switching at run time if
  732. running on a CPU that supports it.
  733. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  734. config XSCALE_PMU
  735. bool
  736. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  737. default y
  738. if !MMU
  739. source "arch/arm/Kconfig-nommu"
  740. endif
  741. config ARM_ERRATA_411920
  742. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  743. depends on CPU_V6 && !SMP
  744. help
  745. Invalidation of the Instruction Cache operation can
  746. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  747. It does not affect the MPCore. This option enables the ARM Ltd.
  748. recommended workaround.
  749. config ARM_ERRATA_430973
  750. bool "ARM errata: Stale prediction on replaced interworking branch"
  751. depends on CPU_V7
  752. help
  753. This option enables the workaround for the 430973 Cortex-A8
  754. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  755. interworking branch is replaced with another code sequence at the
  756. same virtual address, whether due to self-modifying code or virtual
  757. to physical address re-mapping, Cortex-A8 does not recover from the
  758. stale interworking branch prediction. This results in Cortex-A8
  759. executing the new code sequence in the incorrect ARM or Thumb state.
  760. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  761. and also flushes the branch target cache at every context switch.
  762. Note that setting specific bits in the ACTLR register may not be
  763. available in non-secure mode.
  764. config ARM_ERRATA_458693
  765. bool "ARM errata: Processor deadlock when a false hazard is created"
  766. depends on CPU_V7
  767. help
  768. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  769. erratum. For very specific sequences of memory operations, it is
  770. possible for a hazard condition intended for a cache line to instead
  771. be incorrectly associated with a different cache line. This false
  772. hazard might then cause a processor deadlock. The workaround enables
  773. the L1 caching of the NEON accesses and disables the PLD instruction
  774. in the ACTLR register. Note that setting specific bits in the ACTLR
  775. register may not be available in non-secure mode.
  776. config ARM_ERRATA_460075
  777. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  778. depends on CPU_V7
  779. help
  780. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  781. erratum. Any asynchronous access to the L2 cache may encounter a
  782. situation in which recent store transactions to the L2 cache are lost
  783. and overwritten with stale memory contents from external memory. The
  784. workaround disables the write-allocate mode for the L2 cache via the
  785. ACTLR register. Note that setting specific bits in the ACTLR register
  786. may not be available in non-secure mode.
  787. endmenu
  788. source "arch/arm/common/Kconfig"
  789. config FORCE_MAX_ZONEORDER
  790. int
  791. depends on SA1111
  792. default "9"
  793. menu "Bus support"
  794. config ARM_AMBA
  795. bool
  796. config ISA
  797. bool
  798. help
  799. Find out whether you have ISA slots on your motherboard. ISA is the
  800. name of a bus system, i.e. the way the CPU talks to the other stuff
  801. inside your box. Other bus systems are PCI, EISA, MicroChannel
  802. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  803. newer boards don't support it. If you have ISA, say Y, otherwise N.
  804. # Select ISA DMA controller support
  805. config ISA_DMA
  806. bool
  807. select ISA_DMA_API
  808. # Select ISA DMA interface
  809. config ISA_DMA_API
  810. bool
  811. config PCI
  812. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  813. help
  814. Find out whether you have a PCI motherboard. PCI is the name of a
  815. bus system, i.e. the way the CPU talks to the other stuff inside
  816. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  817. VESA. If you have PCI, say Y, otherwise N.
  818. config PCI_SYSCALL
  819. def_bool PCI
  820. # Select the host bridge type
  821. config PCI_HOST_VIA82C505
  822. bool
  823. depends on PCI && ARCH_SHARK
  824. default y
  825. config PCI_HOST_ITE8152
  826. bool
  827. depends on PCI && MACH_ARMCORE
  828. default y
  829. select DMABOUNCE
  830. source "drivers/pci/Kconfig"
  831. source "drivers/pcmcia/Kconfig"
  832. endmenu
  833. menu "Kernel Features"
  834. source "kernel/time/Kconfig"
  835. config SMP
  836. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  837. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  838. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  839. depends on GENERIC_CLOCKEVENTS
  840. select USE_GENERIC_SMP_HELPERS
  841. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  842. help
  843. This enables support for systems with more than one CPU. If you have
  844. a system with only one CPU, like most personal computers, say N. If
  845. you have a system with more than one CPU, say Y.
  846. If you say N here, the kernel will run on single and multiprocessor
  847. machines, but will use only one CPU of a multiprocessor machine. If
  848. you say Y here, the kernel will run on many, but not all, single
  849. processor machines. On a single processor machine, the kernel will
  850. run faster if you say N here.
  851. See also <file:Documentation/i386/IO-APIC.txt>,
  852. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  853. <http://www.linuxdoc.org/docs.html#howto>.
  854. If you don't know what to do here, say N.
  855. config HAVE_ARM_SCU
  856. bool
  857. depends on SMP
  858. help
  859. This option enables support for the ARM system coherency unit
  860. config HAVE_ARM_TWD
  861. bool
  862. depends on SMP
  863. help
  864. This options enables support for the ARM timer and watchdog unit
  865. choice
  866. prompt "Memory split"
  867. default VMSPLIT_3G
  868. help
  869. Select the desired split between kernel and user memory.
  870. If you are not absolutely sure what you are doing, leave this
  871. option alone!
  872. config VMSPLIT_3G
  873. bool "3G/1G user/kernel split"
  874. config VMSPLIT_2G
  875. bool "2G/2G user/kernel split"
  876. config VMSPLIT_1G
  877. bool "1G/3G user/kernel split"
  878. endchoice
  879. config PAGE_OFFSET
  880. hex
  881. default 0x40000000 if VMSPLIT_1G
  882. default 0x80000000 if VMSPLIT_2G
  883. default 0xC0000000
  884. config NR_CPUS
  885. int "Maximum number of CPUs (2-32)"
  886. range 2 32
  887. depends on SMP
  888. default "4"
  889. config HOTPLUG_CPU
  890. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  891. depends on SMP && HOTPLUG && EXPERIMENTAL
  892. help
  893. Say Y here to experiment with turning CPUs off and on. CPUs
  894. can be controlled through /sys/devices/system/cpu.
  895. config LOCAL_TIMERS
  896. bool "Use local timer interrupts"
  897. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  898. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  899. default y
  900. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  901. help
  902. Enable support for local timers on SMP platforms, rather then the
  903. legacy IPI broadcast method. Local timers allows the system
  904. accounting to be spread across the timer interval, preventing a
  905. "thundering herd" at every timer tick.
  906. source kernel/Kconfig.preempt
  907. config HZ
  908. int
  909. default 128 if ARCH_L7200
  910. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440
  911. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  912. default AT91_TIMER_HZ if ARCH_AT91
  913. default 100
  914. config THUMB2_KERNEL
  915. bool "Compile the kernel in Thumb-2 mode"
  916. depends on CPU_V7 && EXPERIMENTAL
  917. select AEABI
  918. select ARM_ASM_UNIFIED
  919. help
  920. By enabling this option, the kernel will be compiled in
  921. Thumb-2 mode. A compiler/assembler that understand the unified
  922. ARM-Thumb syntax is needed.
  923. If unsure, say N.
  924. config ARM_ASM_UNIFIED
  925. bool
  926. config AEABI
  927. bool "Use the ARM EABI to compile the kernel"
  928. help
  929. This option allows for the kernel to be compiled using the latest
  930. ARM ABI (aka EABI). This is only useful if you are using a user
  931. space environment that is also compiled with EABI.
  932. Since there are major incompatibilities between the legacy ABI and
  933. EABI, especially with regard to structure member alignment, this
  934. option also changes the kernel syscall calling convention to
  935. disambiguate both ABIs and allow for backward compatibility support
  936. (selected with CONFIG_OABI_COMPAT).
  937. To use this you need GCC version 4.0.0 or later.
  938. config OABI_COMPAT
  939. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  940. depends on AEABI && EXPERIMENTAL
  941. default y
  942. help
  943. This option preserves the old syscall interface along with the
  944. new (ARM EABI) one. It also provides a compatibility layer to
  945. intercept syscalls that have structure arguments which layout
  946. in memory differs between the legacy ABI and the new ARM EABI
  947. (only for non "thumb" binaries). This option adds a tiny
  948. overhead to all syscalls and produces a slightly larger kernel.
  949. If you know you'll be using only pure EABI user space then you
  950. can say N here. If this option is not selected and you attempt
  951. to execute a legacy ABI binary then the result will be
  952. UNPREDICTABLE (in fact it can be predicted that it won't work
  953. at all). If in doubt say Y.
  954. config ARCH_HAS_HOLES_MEMORYMODEL
  955. bool
  956. # Discontigmem is deprecated
  957. config ARCH_DISCONTIGMEM_ENABLE
  958. bool
  959. config ARCH_SPARSEMEM_ENABLE
  960. bool
  961. config ARCH_SPARSEMEM_DEFAULT
  962. def_bool ARCH_SPARSEMEM_ENABLE
  963. config ARCH_SELECT_MEMORY_MODEL
  964. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  965. config NODES_SHIFT
  966. int
  967. default "4" if ARCH_LH7A40X
  968. default "2"
  969. depends on NEED_MULTIPLE_NODES
  970. config HIGHMEM
  971. bool "High Memory Support (EXPERIMENTAL)"
  972. depends on MMU && EXPERIMENTAL
  973. help
  974. The address space of ARM processors is only 4 Gigabytes large
  975. and it has to accommodate user address space, kernel address
  976. space as well as some memory mapped IO. That means that, if you
  977. have a large amount of physical memory and/or IO, not all of the
  978. memory can be "permanently mapped" by the kernel. The physical
  979. memory that is not permanently mapped is called "high memory".
  980. Depending on the selected kernel/user memory split, minimum
  981. vmalloc space and actual amount of RAM, you may not need this
  982. option which should result in a slightly faster kernel.
  983. If unsure, say n.
  984. config HIGHPTE
  985. bool "Allocate 2nd-level pagetables from highmem"
  986. depends on HIGHMEM
  987. depends on !OUTER_CACHE
  988. source "mm/Kconfig"
  989. config LEDS
  990. bool "Timer and CPU usage LEDs"
  991. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  992. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  993. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  994. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  995. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  996. ARCH_AT91 || ARCH_DAVINCI || \
  997. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  998. help
  999. If you say Y here, the LEDs on your machine will be used
  1000. to provide useful information about your current system status.
  1001. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1002. be able to select which LEDs are active using the options below. If
  1003. you are compiling a kernel for the EBSA-110 or the LART however, the
  1004. red LED will simply flash regularly to indicate that the system is
  1005. still functional. It is safe to say Y here if you have a CATS
  1006. system, but the driver will do nothing.
  1007. config LEDS_TIMER
  1008. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1009. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1010. || MACH_OMAP_PERSEUS2
  1011. depends on LEDS
  1012. depends on !GENERIC_CLOCKEVENTS
  1013. default y if ARCH_EBSA110
  1014. help
  1015. If you say Y here, one of the system LEDs (the green one on the
  1016. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1017. will flash regularly to indicate that the system is still
  1018. operational. This is mainly useful to kernel hackers who are
  1019. debugging unstable kernels.
  1020. The LART uses the same LED for both Timer LED and CPU usage LED
  1021. functions. You may choose to use both, but the Timer LED function
  1022. will overrule the CPU usage LED.
  1023. config LEDS_CPU
  1024. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1025. !ARCH_OMAP) \
  1026. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1027. || MACH_OMAP_PERSEUS2
  1028. depends on LEDS
  1029. help
  1030. If you say Y here, the red LED will be used to give a good real
  1031. time indication of CPU usage, by lighting whenever the idle task
  1032. is not currently executing.
  1033. The LART uses the same LED for both Timer LED and CPU usage LED
  1034. functions. You may choose to use both, but the Timer LED function
  1035. will overrule the CPU usage LED.
  1036. config ALIGNMENT_TRAP
  1037. bool
  1038. depends on CPU_CP15_MMU
  1039. default y if !ARCH_EBSA110
  1040. help
  1041. ARM processors cannot fetch/store information which is not
  1042. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1043. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1044. fetch/store instructions will be emulated in software if you say
  1045. here, which has a severe performance impact. This is necessary for
  1046. correct operation of some network protocols. With an IP-only
  1047. configuration it is safe to say N, otherwise say Y.
  1048. config UACCESS_WITH_MEMCPY
  1049. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1050. depends on MMU && EXPERIMENTAL
  1051. default y if CPU_FEROCEON
  1052. help
  1053. Implement faster copy_to_user and clear_user methods for CPU
  1054. cores where a 8-word STM instruction give significantly higher
  1055. memory write throughput than a sequence of individual 32bit stores.
  1056. A possible side effect is a slight increase in scheduling latency
  1057. between threads sharing the same address space if they invoke
  1058. such copy operations with large buffers.
  1059. However, if the CPU data cache is using a write-allocate mode,
  1060. this option is unlikely to provide any performance gain.
  1061. endmenu
  1062. menu "Boot options"
  1063. # Compressed boot loader in ROM. Yes, we really want to ask about
  1064. # TEXT and BSS so we preserve their values in the config files.
  1065. config ZBOOT_ROM_TEXT
  1066. hex "Compressed ROM boot loader base address"
  1067. default "0"
  1068. help
  1069. The physical address at which the ROM-able zImage is to be
  1070. placed in the target. Platforms which normally make use of
  1071. ROM-able zImage formats normally set this to a suitable
  1072. value in their defconfig file.
  1073. If ZBOOT_ROM is not enabled, this has no effect.
  1074. config ZBOOT_ROM_BSS
  1075. hex "Compressed ROM boot loader BSS address"
  1076. default "0"
  1077. help
  1078. The base address of an area of read/write memory in the target
  1079. for the ROM-able zImage which must be available while the
  1080. decompressor is running. It must be large enough to hold the
  1081. entire decompressed kernel plus an additional 128 KiB.
  1082. Platforms which normally make use of ROM-able zImage formats
  1083. normally set this to a suitable value in their defconfig file.
  1084. If ZBOOT_ROM is not enabled, this has no effect.
  1085. config ZBOOT_ROM
  1086. bool "Compressed boot loader in ROM/flash"
  1087. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1088. help
  1089. Say Y here if you intend to execute your compressed kernel image
  1090. (zImage) directly from ROM or flash. If unsure, say N.
  1091. config CMDLINE
  1092. string "Default kernel command string"
  1093. default ""
  1094. help
  1095. On some architectures (EBSA110 and CATS), there is currently no way
  1096. for the boot loader to pass arguments to the kernel. For these
  1097. architectures, you should supply some command-line options at build
  1098. time by entering them here. As a minimum, you should specify the
  1099. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1100. config XIP_KERNEL
  1101. bool "Kernel Execute-In-Place from ROM"
  1102. depends on !ZBOOT_ROM
  1103. help
  1104. Execute-In-Place allows the kernel to run from non-volatile storage
  1105. directly addressable by the CPU, such as NOR flash. This saves RAM
  1106. space since the text section of the kernel is not loaded from flash
  1107. to RAM. Read-write sections, such as the data section and stack,
  1108. are still copied to RAM. The XIP kernel is not compressed since
  1109. it has to run directly from flash, so it will take more space to
  1110. store it. The flash address used to link the kernel object files,
  1111. and for storing it, is configuration dependent. Therefore, if you
  1112. say Y here, you must know the proper physical address where to
  1113. store the kernel image depending on your own flash memory usage.
  1114. Also note that the make target becomes "make xipImage" rather than
  1115. "make zImage" or "make Image". The final kernel binary to put in
  1116. ROM memory will be arch/arm/boot/xipImage.
  1117. If unsure, say N.
  1118. config XIP_PHYS_ADDR
  1119. hex "XIP Kernel Physical Location"
  1120. depends on XIP_KERNEL
  1121. default "0x00080000"
  1122. help
  1123. This is the physical address in your flash memory the kernel will
  1124. be linked for and stored to. This address is dependent on your
  1125. own flash usage.
  1126. config KEXEC
  1127. bool "Kexec system call (EXPERIMENTAL)"
  1128. depends on EXPERIMENTAL
  1129. help
  1130. kexec is a system call that implements the ability to shutdown your
  1131. current kernel, and to start another kernel. It is like a reboot
  1132. but it is independent of the system firmware. And like a reboot
  1133. you can start any kernel with it, not just Linux.
  1134. It is an ongoing process to be certain the hardware in a machine
  1135. is properly shutdown, so do not be surprised if this code does not
  1136. initially work for you. It may help to enable device hotplugging
  1137. support.
  1138. config ATAGS_PROC
  1139. bool "Export atags in procfs"
  1140. depends on KEXEC
  1141. default y
  1142. help
  1143. Should the atags used to boot the kernel be exported in an "atags"
  1144. file in procfs. Useful with kexec.
  1145. endmenu
  1146. menu "CPU Power Management"
  1147. if ARCH_HAS_CPUFREQ
  1148. source "drivers/cpufreq/Kconfig"
  1149. config CPU_FREQ_SA1100
  1150. bool
  1151. config CPU_FREQ_SA1110
  1152. bool
  1153. config CPU_FREQ_INTEGRATOR
  1154. tristate "CPUfreq driver for ARM Integrator CPUs"
  1155. depends on ARCH_INTEGRATOR && CPU_FREQ
  1156. default y
  1157. help
  1158. This enables the CPUfreq driver for ARM Integrator CPUs.
  1159. For details, take a look at <file:Documentation/cpu-freq>.
  1160. If in doubt, say Y.
  1161. config CPU_FREQ_PXA
  1162. bool
  1163. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1164. default y
  1165. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1166. config CPU_FREQ_S3C64XX
  1167. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1168. depends on CPU_FREQ && CPU_S3C6410
  1169. config CPU_FREQ_S3C
  1170. bool
  1171. help
  1172. Internal configuration node for common cpufreq on Samsung SoC
  1173. config CPU_FREQ_S3C24XX
  1174. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1175. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1176. select CPU_FREQ_S3C
  1177. help
  1178. This enables the CPUfreq driver for the Samsung S3C24XX family
  1179. of CPUs.
  1180. For details, take a look at <file:Documentation/cpu-freq>.
  1181. If in doubt, say N.
  1182. config CPU_FREQ_S3C24XX_PLL
  1183. bool "Support CPUfreq changing of PLL frequency"
  1184. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1185. help
  1186. Compile in support for changing the PLL frequency from the
  1187. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1188. after a frequency change, so by default it is not enabled.
  1189. This also means that the PLL tables for the selected CPU(s) will
  1190. be built which may increase the size of the kernel image.
  1191. config CPU_FREQ_S3C24XX_DEBUG
  1192. bool "Debug CPUfreq Samsung driver core"
  1193. depends on CPU_FREQ_S3C24XX
  1194. help
  1195. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1196. config CPU_FREQ_S3C24XX_IODEBUG
  1197. bool "Debug CPUfreq Samsung driver IO timing"
  1198. depends on CPU_FREQ_S3C24XX
  1199. help
  1200. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1201. config CPU_FREQ_S3C24XX_DEBUGFS
  1202. bool "Export debugfs for CPUFreq"
  1203. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1204. help
  1205. Export status information via debugfs.
  1206. endif
  1207. source "drivers/cpuidle/Kconfig"
  1208. endmenu
  1209. menu "Floating point emulation"
  1210. comment "At least one emulation must be selected"
  1211. config FPE_NWFPE
  1212. bool "NWFPE math emulation"
  1213. depends on !AEABI || OABI_COMPAT
  1214. ---help---
  1215. Say Y to include the NWFPE floating point emulator in the kernel.
  1216. This is necessary to run most binaries. Linux does not currently
  1217. support floating point hardware so you need to say Y here even if
  1218. your machine has an FPA or floating point co-processor podule.
  1219. You may say N here if you are going to load the Acorn FPEmulator
  1220. early in the bootup.
  1221. config FPE_NWFPE_XP
  1222. bool "Support extended precision"
  1223. depends on FPE_NWFPE
  1224. help
  1225. Say Y to include 80-bit support in the kernel floating-point
  1226. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1227. Note that gcc does not generate 80-bit operations by default,
  1228. so in most cases this option only enlarges the size of the
  1229. floating point emulator without any good reason.
  1230. You almost surely want to say N here.
  1231. config FPE_FASTFPE
  1232. bool "FastFPE math emulation (EXPERIMENTAL)"
  1233. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1234. ---help---
  1235. Say Y here to include the FAST floating point emulator in the kernel.
  1236. This is an experimental much faster emulator which now also has full
  1237. precision for the mantissa. It does not support any exceptions.
  1238. It is very simple, and approximately 3-6 times faster than NWFPE.
  1239. It should be sufficient for most programs. It may be not suitable
  1240. for scientific calculations, but you have to check this for yourself.
  1241. If you do not feel you need a faster FP emulation you should better
  1242. choose NWFPE.
  1243. config VFP
  1244. bool "VFP-format floating point maths"
  1245. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1246. help
  1247. Say Y to include VFP support code in the kernel. This is needed
  1248. if your hardware includes a VFP unit.
  1249. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1250. release notes and additional status information.
  1251. Say N if your target does not have VFP hardware.
  1252. config VFPv3
  1253. bool
  1254. depends on VFP
  1255. default y if CPU_V7
  1256. config NEON
  1257. bool "Advanced SIMD (NEON) Extension support"
  1258. depends on VFPv3 && CPU_V7
  1259. help
  1260. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1261. Extension.
  1262. endmenu
  1263. menu "Userspace binary formats"
  1264. source "fs/Kconfig.binfmt"
  1265. config ARTHUR
  1266. tristate "RISC OS personality"
  1267. depends on !AEABI
  1268. help
  1269. Say Y here to include the kernel code necessary if you want to run
  1270. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1271. experimental; if this sounds frightening, say N and sleep in peace.
  1272. You can also say M here to compile this support as a module (which
  1273. will be called arthur).
  1274. endmenu
  1275. menu "Power management options"
  1276. source "kernel/power/Kconfig"
  1277. config ARCH_SUSPEND_POSSIBLE
  1278. def_bool y
  1279. endmenu
  1280. source "net/Kconfig"
  1281. source "drivers/Kconfig"
  1282. source "fs/Kconfig"
  1283. source "arch/arm/Kconfig.debug"
  1284. source "security/Kconfig"
  1285. source "crypto/Kconfig"
  1286. source "lib/Kconfig"