Kconfig 29 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991001011021031041051061071081091101111121131141151161171181191201211221231241251261271281291301311321331341351361371381391401411421431441451461471481491501511521531541551561571581591601611621631641651661671681691701711721731741751761771781791801811821831841851861871881891901911921931941951961971981992002012022032042052062072082092102112122132142152162172182192202212222232242252262272282292302312322332342352362372382392402412422432442452462472482492502512522532542552562572582592602612622632642652662672682692702712722732742752762772782792802812822832842852862872882892902912922932942952962972982993003013023033043053063073083093103113123133143153163173183193203213223233243253263273283293303313323333343353363373383393403413423433443453463473483493503513523533543553563573583593603613623633643653663673683693703713723733743753763773783793803813823833843853863873883893903913923933943953963973983994004014024034044054064074084094104114124134144154164174184194204214224234244254264274284294304314324334344354364374384394404414424434444454464474484494504514524534544554564574584594604614624634644654664674684694704714724734744754764774784794804814824834844854864874884894904914924934944954964974984995005015025035045055065075085095105115125135145155165175185195205215225235245255265275285295305315325335345355365375385395405415425435445455465475485495505515525535545555565575585595605615625635645655665675685695705715725735745755765775785795805815825835845855865875885895905915925935945955965975985996006016026036046056066076086096106116126136146156166176186196206216226236246256266276286296306316326336346356366376386396406416426436446456466476486496506516526536546556566576586596606616626636646656666676686696706716726736746756766776786796806816826836846856866876886896906916926936946956966976986997007017027037047057067077087097107117127137147157167177187197207217227237247257267277287297307317327337347357367377387397407417427437447457467477487497507517527537547557567577587597607617627637647657667677687697707717727737747757767777787797807817827837847857867877887897907917927937947957967977987998008018028038048058068078088098108118128138148158168178188198208218228238248258268278288298308318328338348358368378388398408418428438448458468478488498508518528538548558568578588598608618628638648658668678688698708718728738748758768778788798808818828838848858868878888898908918928938948958968978988999009019029039049059069079089099109119129139149159169179189199209219229239249259269279289299309319329339349359369379389399409419429439449459469479489499509519529539549559569579589599609619629639649659669679689699709719729739749759769779789799809819829839849859869879889899909919929939949959969979989991000100110021003100410051006100710081009101010111012101310141015101610171018101910201021102210231024102510261027102810291030103110321033103410351036103710381039104010411042104310441045104610471048104910501051105210531054105510561057105810591060106110621063106410651066106710681069107010711072107310741075107610771078107910801081108210831084108510861087108810891090109110921093109410951096109710981099110011011102110311041105110611071108110911101111111211131114111511161117
  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 RTC_LIB
  10. select SYS_SUPPORTS_APM_EMULATION
  11. help
  12. The ARM series is a line of low-power-consumption RISC chip designs
  13. licensed by ARM Ltd and targeted at embedded applications and
  14. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  15. manufactured, but legacy ARM-based PC hardware remains popular in
  16. Europe. There is an ARM Linux project with a web page at
  17. <http://www.arm.linux.org.uk/>.
  18. config SYS_SUPPORTS_APM_EMULATION
  19. bool
  20. config GENERIC_GPIO
  21. bool
  22. default n
  23. config GENERIC_TIME
  24. bool
  25. default n
  26. config GENERIC_CLOCKEVENTS
  27. bool
  28. default n
  29. config MMU
  30. bool
  31. default y
  32. config NO_IOPORT
  33. bool
  34. default n
  35. config EISA
  36. bool
  37. ---help---
  38. The Extended Industry Standard Architecture (EISA) bus was
  39. developed as an open alternative to the IBM MicroChannel bus.
  40. The EISA bus provided some of the features of the IBM MicroChannel
  41. bus while maintaining backward compatibility with cards made for
  42. the older ISA bus. The EISA bus saw limited use between 1988 and
  43. 1995 when it was made obsolete by the PCI bus.
  44. Say Y here if you are building a kernel for an EISA-based machine.
  45. Otherwise, say N.
  46. config SBUS
  47. bool
  48. config MCA
  49. bool
  50. help
  51. MicroChannel Architecture is found in some IBM PS/2 machines and
  52. laptops. It is a bus system similar to PCI or ISA. See
  53. <file:Documentation/mca.txt> (and especially the web page given
  54. there) before attempting to build an MCA bus kernel.
  55. config GENERIC_HARDIRQS
  56. bool
  57. default y
  58. config STACKTRACE_SUPPORT
  59. bool
  60. default y
  61. config LOCKDEP_SUPPORT
  62. bool
  63. default y
  64. config TRACE_IRQFLAGS_SUPPORT
  65. bool
  66. default y
  67. config HARDIRQS_SW_RESEND
  68. bool
  69. default y
  70. config GENERIC_IRQ_PROBE
  71. bool
  72. default y
  73. config RWSEM_GENERIC_SPINLOCK
  74. bool
  75. default y
  76. config RWSEM_XCHGADD_ALGORITHM
  77. bool
  78. config ARCH_HAS_ILOG2_U32
  79. bool
  80. default n
  81. config ARCH_HAS_ILOG2_U64
  82. bool
  83. default n
  84. config GENERIC_HWEIGHT
  85. bool
  86. default y
  87. config GENERIC_CALIBRATE_DELAY
  88. bool
  89. default y
  90. config ARCH_MAY_HAVE_PC_FDC
  91. bool
  92. config ZONE_DMA
  93. bool
  94. default y
  95. config GENERIC_ISA_DMA
  96. bool
  97. config FIQ
  98. bool
  99. config ARCH_MTD_XIP
  100. bool
  101. config VECTORS_BASE
  102. hex
  103. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  104. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  105. default 0x00000000
  106. help
  107. The base address of exception vectors.
  108. source "init/Kconfig"
  109. menu "System Type"
  110. choice
  111. prompt "ARM system type"
  112. default ARCH_VERSATILE
  113. config ARCH_AAEC2000
  114. bool "Agilent AAEC-2000 based"
  115. select ARM_AMBA
  116. help
  117. This enables support for systems based on the Agilent AAEC-2000
  118. config ARCH_INTEGRATOR
  119. bool "ARM Ltd. Integrator family"
  120. select ARM_AMBA
  121. select ICST525
  122. help
  123. Support for ARM's Integrator platform.
  124. config ARCH_REALVIEW
  125. bool "ARM Ltd. RealView family"
  126. select ARM_AMBA
  127. select ICST307
  128. help
  129. This enables support for ARM Ltd RealView boards.
  130. config ARCH_VERSATILE
  131. bool "ARM Ltd. Versatile family"
  132. select ARM_AMBA
  133. select ARM_VIC
  134. select ICST307
  135. select GENERIC_TIME
  136. select GENERIC_CLOCKEVENTS
  137. help
  138. This enables support for ARM Ltd Versatile board.
  139. config ARCH_AT91
  140. bool "Atmel AT91"
  141. select GENERIC_GPIO
  142. help
  143. This enables support for systems based on the Atmel AT91RM9200,
  144. AT91SAM9 and AT91CAP9 processors.
  145. config ARCH_CLPS7500
  146. bool "Cirrus CL-PS7500FE"
  147. select TIMER_ACORN
  148. select ISA
  149. select NO_IOPORT
  150. help
  151. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  152. config ARCH_CLPS711X
  153. bool "Cirrus Logic CLPS711x/EP721x-based"
  154. help
  155. Support for Cirrus Logic 711x/721x based boards.
  156. config ARCH_CO285
  157. bool "Co-EBSA285"
  158. select FOOTBRIDGE
  159. select FOOTBRIDGE_ADDIN
  160. help
  161. Support for Intel's EBSA285 companion chip.
  162. config ARCH_EBSA110
  163. bool "EBSA-110"
  164. select ISA
  165. select NO_IOPORT
  166. help
  167. This is an evaluation board for the StrongARM processor available
  168. from Digital. It has limited hardware on-board, including an
  169. Ethernet interface, two PCMCIA sockets, two serial ports and a
  170. parallel port.
  171. config ARCH_EP93XX
  172. bool "EP93xx-based"
  173. select ARM_AMBA
  174. select ARM_VIC
  175. select GENERIC_GPIO
  176. help
  177. This enables support for the Cirrus EP93xx series of CPUs.
  178. config ARCH_FOOTBRIDGE
  179. bool "FootBridge"
  180. select FOOTBRIDGE
  181. help
  182. Support for systems based on the DC21285 companion chip
  183. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  184. config ARCH_NETX
  185. bool "Hilscher NetX based"
  186. select ARM_VIC
  187. help
  188. This enables support for systems based on the Hilscher NetX Soc
  189. config ARCH_H720X
  190. bool "Hynix HMS720x-based"
  191. select ISA_DMA_API
  192. help
  193. This enables support for systems based on the Hynix HMS720x
  194. config ARCH_IMX
  195. bool "IMX"
  196. select GENERIC_GPIO
  197. select GENERIC_TIME
  198. select GENERIC_CLOCKEVENTS
  199. help
  200. Support for Motorola's i.MX family of processors (MX1, MXL).
  201. config ARCH_IOP13XX
  202. bool "IOP13xx-based"
  203. depends on MMU
  204. select PLAT_IOP
  205. select PCI
  206. select ARCH_SUPPORTS_MSI
  207. help
  208. Support for Intel's IOP13XX (XScale) family of processors.
  209. config ARCH_IOP32X
  210. bool "IOP32x-based"
  211. depends on MMU
  212. select PLAT_IOP
  213. select PCI
  214. help
  215. Support for Intel's 80219 and IOP32X (XScale) family of
  216. processors.
  217. config ARCH_IOP33X
  218. bool "IOP33x-based"
  219. depends on MMU
  220. select PLAT_IOP
  221. select PCI
  222. help
  223. Support for Intel's IOP33X (XScale) family of processors.
  224. config ARCH_IXP23XX
  225. bool "IXP23XX-based"
  226. depends on MMU
  227. select PCI
  228. help
  229. Support for Intel's IXP23xx (XScale) family of processors.
  230. config ARCH_IXP2000
  231. bool "IXP2400/2800-based"
  232. depends on MMU
  233. select PCI
  234. help
  235. Support for Intel's IXP2400/2800 (XScale) family of processors.
  236. config ARCH_IXP4XX
  237. bool "IXP4xx-based"
  238. depends on MMU
  239. select GENERIC_GPIO
  240. select GENERIC_TIME
  241. select GENERIC_CLOCKEVENTS
  242. help
  243. Support for Intel's IXP4XX (XScale) family of processors.
  244. config ARCH_L7200
  245. bool "LinkUp-L7200"
  246. select FIQ
  247. help
  248. Say Y here if you intend to run this kernel on a LinkUp Systems
  249. L7200 Software Development Board which uses an ARM720T processor.
  250. Information on this board can be obtained at:
  251. <http://www.linkupsys.com/>
  252. If you have any questions or comments about the Linux kernel port
  253. to this board, send e-mail to <sjhill@cotw.com>.
  254. config ARCH_KS8695
  255. bool "Micrel/Kendin KS8695"
  256. select GENERIC_GPIO
  257. help
  258. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  259. System-on-Chip devices.
  260. config ARCH_NS9XXX
  261. bool "NetSilicon NS9xxx"
  262. select GENERIC_GPIO
  263. select GENERIC_TIME
  264. select GENERIC_CLOCKEVENTS
  265. help
  266. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  267. System.
  268. <http://www.digi.com/products/microprocessors/index.jsp>
  269. config ARCH_MXC
  270. bool "Freescale MXC/iMX-based"
  271. select ARCH_MTD_XIP
  272. help
  273. Support for Freescale MXC/iMX-based family of processors
  274. config ARCH_PNX4008
  275. bool "Philips Nexperia PNX4008 Mobile"
  276. help
  277. This enables support for Philips PNX4008 mobile platform.
  278. config ARCH_PXA
  279. bool "PXA2xx/PXA3xx-based"
  280. depends on MMU
  281. select ARCH_MTD_XIP
  282. select GENERIC_GPIO
  283. select GENERIC_TIME
  284. select GENERIC_CLOCKEVENTS
  285. help
  286. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  287. config ARCH_RPC
  288. bool "RiscPC"
  289. select ARCH_ACORN
  290. select FIQ
  291. select TIMER_ACORN
  292. select ARCH_MAY_HAVE_PC_FDC
  293. select ISA_DMA_API
  294. select NO_IOPORT
  295. help
  296. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  297. CD-ROM interface, serial and parallel port, and the floppy drive.
  298. config ARCH_SA1100
  299. bool "SA1100-based"
  300. select ISA
  301. select ARCH_DISCONTIGMEM_ENABLE
  302. select ARCH_MTD_XIP
  303. select GENERIC_GPIO
  304. select GENERIC_TIME
  305. help
  306. Support for StrongARM 11x0 based boards.
  307. config ARCH_S3C2410
  308. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  309. select GENERIC_GPIO
  310. help
  311. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  312. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  313. the Samsung SMDK2410 development board (and derivatives).
  314. config ARCH_SHARK
  315. bool "Shark"
  316. select ISA
  317. select ISA_DMA
  318. select PCI
  319. help
  320. Support for the StrongARM based Digital DNARD machine, also known
  321. as "Shark" (<http://www.shark-linux.de/shark.html>).
  322. config ARCH_LH7A40X
  323. bool "Sharp LH7A40X"
  324. help
  325. Say Y here for systems based on one of the Sharp LH7A40X
  326. System on a Chip processors. These CPUs include an ARM922T
  327. core with a wide array of integrated devices for
  328. hand-held and low-power applications.
  329. config ARCH_DAVINCI
  330. bool "TI DaVinci"
  331. select GENERIC_TIME
  332. select GENERIC_CLOCKEVENTS
  333. select GENERIC_GPIO
  334. help
  335. Support for TI's DaVinci platform.
  336. config ARCH_OMAP
  337. bool "TI OMAP"
  338. select GENERIC_GPIO
  339. select GENERIC_TIME
  340. help
  341. Support for TI's OMAP platform (OMAP1 and OMAP2).
  342. config ARCH_MSM7X00A
  343. bool "Qualcomm MSM7X00A"
  344. select GENERIC_TIME
  345. select GENERIC_CLOCKEVENTS
  346. help
  347. Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
  348. apps processor of the MSM7X00A and depends on a shared memory
  349. interface to the ARM9 modem processor which runs the baseband stack
  350. and controls some vital subsystems (clock and power control, etc).
  351. <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
  352. endchoice
  353. source "arch/arm/mach-clps711x/Kconfig"
  354. source "arch/arm/mach-ep93xx/Kconfig"
  355. source "arch/arm/mach-footbridge/Kconfig"
  356. source "arch/arm/mach-integrator/Kconfig"
  357. source "arch/arm/mach-iop32x/Kconfig"
  358. source "arch/arm/mach-iop33x/Kconfig"
  359. source "arch/arm/mach-iop13xx/Kconfig"
  360. source "arch/arm/mach-ixp4xx/Kconfig"
  361. source "arch/arm/mach-ixp2000/Kconfig"
  362. source "arch/arm/mach-ixp23xx/Kconfig"
  363. source "arch/arm/mach-pxa/Kconfig"
  364. source "arch/arm/mach-sa1100/Kconfig"
  365. source "arch/arm/plat-omap/Kconfig"
  366. source "arch/arm/mach-omap1/Kconfig"
  367. source "arch/arm/mach-omap2/Kconfig"
  368. source "arch/arm/plat-s3c24xx/Kconfig"
  369. source "arch/arm/plat-s3c/Kconfig"
  370. if ARCH_S3C2410
  371. source "arch/arm/mach-s3c2400/Kconfig"
  372. source "arch/arm/mach-s3c2410/Kconfig"
  373. source "arch/arm/mach-s3c2412/Kconfig"
  374. source "arch/arm/mach-s3c2440/Kconfig"
  375. source "arch/arm/mach-s3c2442/Kconfig"
  376. source "arch/arm/mach-s3c2443/Kconfig"
  377. endif
  378. source "arch/arm/mach-lh7a40x/Kconfig"
  379. source "arch/arm/mach-imx/Kconfig"
  380. source "arch/arm/mach-h720x/Kconfig"
  381. source "arch/arm/mach-versatile/Kconfig"
  382. source "arch/arm/mach-aaec2000/Kconfig"
  383. source "arch/arm/mach-realview/Kconfig"
  384. source "arch/arm/mach-at91/Kconfig"
  385. source "arch/arm/plat-mxc/Kconfig"
  386. source "arch/arm/mach-netx/Kconfig"
  387. source "arch/arm/mach-ns9xxx/Kconfig"
  388. source "arch/arm/mach-davinci/Kconfig"
  389. source "arch/arm/mach-ks8695/Kconfig"
  390. source "arch/arm/mach-msm/Kconfig"
  391. # Definitions to make life easier
  392. config ARCH_ACORN
  393. bool
  394. config PLAT_IOP
  395. bool
  396. source arch/arm/mm/Kconfig
  397. config IWMMXT
  398. bool "Enable iWMMXt support"
  399. depends on CPU_XSCALE || CPU_XSC3
  400. default y if PXA27x || PXA3xx
  401. help
  402. Enable support for iWMMXt context switching at run time if
  403. running on a CPU that supports it.
  404. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  405. config XSCALE_PMU
  406. bool
  407. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  408. default y
  409. if !MMU
  410. source "arch/arm/Kconfig-nommu"
  411. endif
  412. endmenu
  413. source "arch/arm/common/Kconfig"
  414. config FORCE_MAX_ZONEORDER
  415. int
  416. depends on SA1111
  417. default "9"
  418. menu "Bus support"
  419. config ARM_AMBA
  420. bool
  421. config ISA
  422. bool
  423. help
  424. Find out whether you have ISA slots on your motherboard. ISA is the
  425. name of a bus system, i.e. the way the CPU talks to the other stuff
  426. inside your box. Other bus systems are PCI, EISA, MicroChannel
  427. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  428. newer boards don't support it. If you have ISA, say Y, otherwise N.
  429. # Select ISA DMA controller support
  430. config ISA_DMA
  431. bool
  432. select ISA_DMA_API
  433. # Select ISA DMA interface
  434. config ISA_DMA_API
  435. bool
  436. config PCI
  437. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  438. help
  439. Find out whether you have a PCI motherboard. PCI is the name of a
  440. bus system, i.e. the way the CPU talks to the other stuff inside
  441. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  442. VESA. If you have PCI, say Y, otherwise N.
  443. The PCI-HOWTO, available from
  444. <http://www.tldp.org/docs.html#howto>, contains valuable
  445. information about which PCI hardware does work under Linux and which
  446. doesn't.
  447. config PCI_SYSCALL
  448. def_bool PCI
  449. # Select the host bridge type
  450. config PCI_HOST_VIA82C505
  451. bool
  452. depends on PCI && ARCH_SHARK
  453. default y
  454. config PCI_HOST_ITE8152
  455. bool
  456. depends on PCI && MACH_ARMCORE
  457. default y
  458. select DMABOUNCE
  459. source "drivers/pci/Kconfig"
  460. source "drivers/pcmcia/Kconfig"
  461. endmenu
  462. menu "Kernel Features"
  463. source "kernel/time/Kconfig"
  464. config SMP
  465. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  466. depends on EXPERIMENTAL && REALVIEW_MPCORE
  467. help
  468. This enables support for systems with more than one CPU. If you have
  469. a system with only one CPU, like most personal computers, say N. If
  470. you have a system with more than one CPU, say Y.
  471. If you say N here, the kernel will run on single and multiprocessor
  472. machines, but will use only one CPU of a multiprocessor machine. If
  473. you say Y here, the kernel will run on many, but not all, single
  474. processor machines. On a single processor machine, the kernel will
  475. run faster if you say N here.
  476. See also the <file:Documentation/smp.txt>,
  477. <file:Documentation/i386/IO-APIC.txt>,
  478. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  479. <http://www.linuxdoc.org/docs.html#howto>.
  480. If you don't know what to do here, say N.
  481. config NR_CPUS
  482. int "Maximum number of CPUs (2-32)"
  483. range 2 32
  484. depends on SMP
  485. default "4"
  486. config HOTPLUG_CPU
  487. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  488. depends on SMP && HOTPLUG && EXPERIMENTAL
  489. help
  490. Say Y here to experiment with turning CPUs off and on. CPUs
  491. can be controlled through /sys/devices/system/cpu.
  492. config LOCAL_TIMERS
  493. bool "Use local timer interrupts"
  494. depends on SMP && REALVIEW_MPCORE
  495. default y
  496. help
  497. Enable support for local timers on SMP platforms, rather then the
  498. legacy IPI broadcast method. Local timers allows the system
  499. accounting to be spread across the timer interval, preventing a
  500. "thundering herd" at every timer tick.
  501. config PREEMPT
  502. bool "Preemptible Kernel (EXPERIMENTAL)"
  503. depends on EXPERIMENTAL
  504. help
  505. This option reduces the latency of the kernel when reacting to
  506. real-time or interactive events by allowing a low priority process to
  507. be preempted even if it is in kernel mode executing a system call.
  508. This allows applications to run more reliably even when the system is
  509. under load.
  510. Say Y here if you are building a kernel for a desktop, embedded
  511. or real-time system. Say N if you are unsure.
  512. config NO_IDLE_HZ
  513. bool "Dynamic tick timer"
  514. depends on !GENERIC_CLOCKEVENTS
  515. help
  516. Select this option if you want to disable continuous timer ticks
  517. and have them programmed to occur as required. This option saves
  518. power as the system can remain in idle state for longer.
  519. By default dynamic tick is disabled during the boot, and can be
  520. manually enabled with:
  521. echo 1 > /sys/devices/system/timer/timer0/dyn_tick
  522. Alternatively, if you want dynamic tick automatically enabled
  523. during boot, pass "dyntick=enable" via the kernel command string.
  524. Please note that dynamic tick may affect the accuracy of
  525. timekeeping on some platforms depending on the implementation.
  526. Currently at least OMAP, PXA2xx and SA11x0 platforms are known
  527. to have accurate timekeeping with dynamic tick.
  528. config HZ
  529. int
  530. default 128 if ARCH_L7200
  531. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  532. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  533. default AT91_TIMER_HZ if ARCH_AT91
  534. default 100
  535. config AEABI
  536. bool "Use the ARM EABI to compile the kernel"
  537. help
  538. This option allows for the kernel to be compiled using the latest
  539. ARM ABI (aka EABI). This is only useful if you are using a user
  540. space environment that is also compiled with EABI.
  541. Since there are major incompatibilities between the legacy ABI and
  542. EABI, especially with regard to structure member alignment, this
  543. option also changes the kernel syscall calling convention to
  544. disambiguate both ABIs and allow for backward compatibility support
  545. (selected with CONFIG_OABI_COMPAT).
  546. To use this you need GCC version 4.0.0 or later.
  547. config OABI_COMPAT
  548. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  549. depends on AEABI && EXPERIMENTAL
  550. default y
  551. help
  552. This option preserves the old syscall interface along with the
  553. new (ARM EABI) one. It also provides a compatibility layer to
  554. intercept syscalls that have structure arguments which layout
  555. in memory differs between the legacy ABI and the new ARM EABI
  556. (only for non "thumb" binaries). This option adds a tiny
  557. overhead to all syscalls and produces a slightly larger kernel.
  558. If you know you'll be using only pure EABI user space then you
  559. can say N here. If this option is not selected and you attempt
  560. to execute a legacy ABI binary then the result will be
  561. UNPREDICTABLE (in fact it can be predicted that it won't work
  562. at all). If in doubt say Y.
  563. config ARCH_DISCONTIGMEM_ENABLE
  564. bool
  565. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  566. help
  567. Say Y to support efficient handling of discontiguous physical memory,
  568. for architectures which are either NUMA (Non-Uniform Memory Access)
  569. or have huge holes in the physical address space for other reasons.
  570. See <file:Documentation/vm/numa> for more.
  571. config NODES_SHIFT
  572. int
  573. default "4" if ARCH_LH7A40X
  574. default "2"
  575. depends on NEED_MULTIPLE_NODES
  576. source "mm/Kconfig"
  577. config LEDS
  578. bool "Timer and CPU usage LEDs"
  579. depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
  580. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  581. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  582. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  583. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  584. ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
  585. ARCH_KS8695
  586. help
  587. If you say Y here, the LEDs on your machine will be used
  588. to provide useful information about your current system status.
  589. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  590. be able to select which LEDs are active using the options below. If
  591. you are compiling a kernel for the EBSA-110 or the LART however, the
  592. red LED will simply flash regularly to indicate that the system is
  593. still functional. It is safe to say Y here if you have a CATS
  594. system, but the driver will do nothing.
  595. config LEDS_TIMER
  596. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  597. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  598. || MACH_OMAP_PERSEUS2
  599. depends on LEDS
  600. depends on !GENERIC_CLOCKEVENTS
  601. default y if ARCH_EBSA110
  602. help
  603. If you say Y here, one of the system LEDs (the green one on the
  604. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  605. will flash regularly to indicate that the system is still
  606. operational. This is mainly useful to kernel hackers who are
  607. debugging unstable kernels.
  608. The LART uses the same LED for both Timer LED and CPU usage LED
  609. functions. You may choose to use both, but the Timer LED function
  610. will overrule the CPU usage LED.
  611. config LEDS_CPU
  612. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  613. !ARCH_OMAP) \
  614. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  615. || MACH_OMAP_PERSEUS2
  616. depends on LEDS
  617. help
  618. If you say Y here, the red LED will be used to give a good real
  619. time indication of CPU usage, by lighting whenever the idle task
  620. is not currently executing.
  621. The LART uses the same LED for both Timer LED and CPU usage LED
  622. functions. You may choose to use both, but the Timer LED function
  623. will overrule the CPU usage LED.
  624. config ALIGNMENT_TRAP
  625. bool
  626. depends on CPU_CP15_MMU
  627. default y if !ARCH_EBSA110
  628. help
  629. ARM processors cannot fetch/store information which is not
  630. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  631. address divisible by 4. On 32-bit ARM processors, these non-aligned
  632. fetch/store instructions will be emulated in software if you say
  633. here, which has a severe performance impact. This is necessary for
  634. correct operation of some network protocols. With an IP-only
  635. configuration it is safe to say N, otherwise say Y.
  636. endmenu
  637. menu "Boot options"
  638. # Compressed boot loader in ROM. Yes, we really want to ask about
  639. # TEXT and BSS so we preserve their values in the config files.
  640. config ZBOOT_ROM_TEXT
  641. hex "Compressed ROM boot loader base address"
  642. default "0"
  643. help
  644. The physical address at which the ROM-able zImage is to be
  645. placed in the target. Platforms which normally make use of
  646. ROM-able zImage formats normally set this to a suitable
  647. value in their defconfig file.
  648. If ZBOOT_ROM is not enabled, this has no effect.
  649. config ZBOOT_ROM_BSS
  650. hex "Compressed ROM boot loader BSS address"
  651. default "0"
  652. help
  653. The base address of an area of read/write memory in the target
  654. for the ROM-able zImage which must be available while the
  655. decompressor is running. It must be large enough to hold the
  656. entire decompressed kernel plus an additional 128 KiB.
  657. Platforms which normally make use of ROM-able zImage formats
  658. normally set this to a suitable value in their defconfig file.
  659. If ZBOOT_ROM is not enabled, this has no effect.
  660. config ZBOOT_ROM
  661. bool "Compressed boot loader in ROM/flash"
  662. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  663. help
  664. Say Y here if you intend to execute your compressed kernel image
  665. (zImage) directly from ROM or flash. If unsure, say N.
  666. config CMDLINE
  667. string "Default kernel command string"
  668. default ""
  669. help
  670. On some architectures (EBSA110 and CATS), there is currently no way
  671. for the boot loader to pass arguments to the kernel. For these
  672. architectures, you should supply some command-line options at build
  673. time by entering them here. As a minimum, you should specify the
  674. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  675. config XIP_KERNEL
  676. bool "Kernel Execute-In-Place from ROM"
  677. depends on !ZBOOT_ROM
  678. help
  679. Execute-In-Place allows the kernel to run from non-volatile storage
  680. directly addressable by the CPU, such as NOR flash. This saves RAM
  681. space since the text section of the kernel is not loaded from flash
  682. to RAM. Read-write sections, such as the data section and stack,
  683. are still copied to RAM. The XIP kernel is not compressed since
  684. it has to run directly from flash, so it will take more space to
  685. store it. The flash address used to link the kernel object files,
  686. and for storing it, is configuration dependent. Therefore, if you
  687. say Y here, you must know the proper physical address where to
  688. store the kernel image depending on your own flash memory usage.
  689. Also note that the make target becomes "make xipImage" rather than
  690. "make zImage" or "make Image". The final kernel binary to put in
  691. ROM memory will be arch/arm/boot/xipImage.
  692. If unsure, say N.
  693. config XIP_PHYS_ADDR
  694. hex "XIP Kernel Physical Location"
  695. depends on XIP_KERNEL
  696. default "0x00080000"
  697. help
  698. This is the physical address in your flash memory the kernel will
  699. be linked for and stored to. This address is dependent on your
  700. own flash usage.
  701. config KEXEC
  702. bool "Kexec system call (EXPERIMENTAL)"
  703. depends on EXPERIMENTAL
  704. help
  705. kexec is a system call that implements the ability to shutdown your
  706. current kernel, and to start another kernel. It is like a reboot
  707. but it is independent of the system firmware. And like a reboot
  708. you can start any kernel with it, not just Linux.
  709. It is an ongoing process to be certain the hardware in a machine
  710. is properly shutdown, so do not be surprised if this code does not
  711. initially work for you. It may help to enable device hotplugging
  712. support.
  713. endmenu
  714. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
  715. menu "CPU Frequency scaling"
  716. source "drivers/cpufreq/Kconfig"
  717. config CPU_FREQ_SA1100
  718. bool
  719. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  720. default y
  721. config CPU_FREQ_SA1110
  722. bool
  723. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  724. default y
  725. config CPU_FREQ_INTEGRATOR
  726. tristate "CPUfreq driver for ARM Integrator CPUs"
  727. depends on ARCH_INTEGRATOR && CPU_FREQ
  728. default y
  729. help
  730. This enables the CPUfreq driver for ARM Integrator CPUs.
  731. For details, take a look at <file:Documentation/cpu-freq>.
  732. If in doubt, say Y.
  733. config CPU_FREQ_IMX
  734. tristate "CPUfreq driver for i.MX CPUs"
  735. depends on ARCH_IMX && CPU_FREQ
  736. default n
  737. help
  738. This enables the CPUfreq driver for i.MX CPUs.
  739. If in doubt, say N.
  740. endmenu
  741. endif
  742. menu "Floating point emulation"
  743. comment "At least one emulation must be selected"
  744. config FPE_NWFPE
  745. bool "NWFPE math emulation"
  746. depends on !AEABI || OABI_COMPAT
  747. ---help---
  748. Say Y to include the NWFPE floating point emulator in the kernel.
  749. This is necessary to run most binaries. Linux does not currently
  750. support floating point hardware so you need to say Y here even if
  751. your machine has an FPA or floating point co-processor podule.
  752. You may say N here if you are going to load the Acorn FPEmulator
  753. early in the bootup.
  754. config FPE_NWFPE_XP
  755. bool "Support extended precision"
  756. depends on FPE_NWFPE
  757. help
  758. Say Y to include 80-bit support in the kernel floating-point
  759. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  760. Note that gcc does not generate 80-bit operations by default,
  761. so in most cases this option only enlarges the size of the
  762. floating point emulator without any good reason.
  763. You almost surely want to say N here.
  764. config FPE_FASTFPE
  765. bool "FastFPE math emulation (EXPERIMENTAL)"
  766. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  767. ---help---
  768. Say Y here to include the FAST floating point emulator in the kernel.
  769. This is an experimental much faster emulator which now also has full
  770. precision for the mantissa. It does not support any exceptions.
  771. It is very simple, and approximately 3-6 times faster than NWFPE.
  772. It should be sufficient for most programs. It may be not suitable
  773. for scientific calculations, but you have to check this for yourself.
  774. If you do not feel you need a faster FP emulation you should better
  775. choose NWFPE.
  776. config VFP
  777. bool "VFP-format floating point maths"
  778. depends on CPU_V6 || CPU_ARM926T || CPU_V7
  779. help
  780. Say Y to include VFP support code in the kernel. This is needed
  781. if your hardware includes a VFP unit.
  782. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  783. release notes and additional status information.
  784. Say N if your target does not have VFP hardware.
  785. config VFPv3
  786. bool
  787. depends on VFP
  788. default y if CPU_V7
  789. config NEON
  790. bool "Advanced SIMD (NEON) Extension support"
  791. depends on VFPv3 && CPU_V7
  792. help
  793. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  794. Extension.
  795. endmenu
  796. menu "Userspace binary formats"
  797. source "fs/Kconfig.binfmt"
  798. config ARTHUR
  799. tristate "RISC OS personality"
  800. depends on !AEABI
  801. help
  802. Say Y here to include the kernel code necessary if you want to run
  803. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  804. experimental; if this sounds frightening, say N and sleep in peace.
  805. You can also say M here to compile this support as a module (which
  806. will be called arthur).
  807. endmenu
  808. menu "Power management options"
  809. source "kernel/power/Kconfig"
  810. endmenu
  811. source "net/Kconfig"
  812. menu "Device Drivers"
  813. source "drivers/base/Kconfig"
  814. source "drivers/connector/Kconfig"
  815. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  816. source "drivers/mtd/Kconfig"
  817. endif
  818. source "drivers/parport/Kconfig"
  819. source "drivers/pnp/Kconfig"
  820. source "drivers/block/Kconfig"
  821. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  822. source "drivers/misc/Kconfig"
  823. if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
  824. || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
  825. || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
  826. || ARCH_IXP23XX
  827. source "drivers/ide/Kconfig"
  828. endif
  829. source "drivers/scsi/Kconfig"
  830. source "drivers/ata/Kconfig"
  831. source "drivers/md/Kconfig"
  832. source "drivers/message/fusion/Kconfig"
  833. source "drivers/ieee1394/Kconfig"
  834. source "drivers/message/i2o/Kconfig"
  835. source "drivers/net/Kconfig"
  836. source "drivers/isdn/Kconfig"
  837. # input before char - char/joystick depends on it. As does USB.
  838. source "drivers/input/Kconfig"
  839. source "drivers/char/Kconfig"
  840. source "drivers/i2c/Kconfig"
  841. source "drivers/spi/Kconfig"
  842. source "drivers/w1/Kconfig"
  843. source "drivers/power/Kconfig"
  844. source "drivers/hwmon/Kconfig"
  845. source "drivers/watchdog/Kconfig"
  846. source "drivers/ssb/Kconfig"
  847. #source "drivers/l3/Kconfig"
  848. source "drivers/mfd/Kconfig"
  849. source "drivers/media/Kconfig"
  850. source "drivers/video/Kconfig"
  851. source "sound/Kconfig"
  852. source "drivers/hid/Kconfig"
  853. source "drivers/usb/Kconfig"
  854. source "drivers/mmc/Kconfig"
  855. source "drivers/leds/Kconfig"
  856. source "drivers/rtc/Kconfig"
  857. source "drivers/dma/Kconfig"
  858. source "drivers/dca/Kconfig"
  859. endmenu
  860. source "fs/Kconfig"
  861. source "arch/arm/Kconfig.instrumentation"
  862. source "arch/arm/Kconfig.debug"
  863. source "security/Kconfig"
  864. source "crypto/Kconfig"
  865. source "lib/Kconfig"