Kconfig 26 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020
  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 MMU
  27. bool
  28. default y
  29. config NO_IOPORT
  30. bool
  31. default n
  32. config EISA
  33. bool
  34. ---help---
  35. The Extended Industry Standard Architecture (EISA) bus was
  36. developed as an open alternative to the IBM MicroChannel bus.
  37. The EISA bus provided some of the features of the IBM MicroChannel
  38. bus while maintaining backward compatibility with cards made for
  39. the older ISA bus. The EISA bus saw limited use between 1988 and
  40. 1995 when it was made obsolete by the PCI bus.
  41. Say Y here if you are building a kernel for an EISA-based machine.
  42. Otherwise, say N.
  43. config SBUS
  44. bool
  45. config MCA
  46. bool
  47. help
  48. MicroChannel Architecture is found in some IBM PS/2 machines and
  49. laptops. It is a bus system similar to PCI or ISA. See
  50. <file:Documentation/mca.txt> (and especially the web page given
  51. there) before attempting to build an MCA bus kernel.
  52. config GENERIC_HARDIRQS
  53. bool
  54. default y
  55. config STACKTRACE_SUPPORT
  56. bool
  57. default y
  58. config LOCKDEP_SUPPORT
  59. bool
  60. default y
  61. config TRACE_IRQFLAGS_SUPPORT
  62. bool
  63. default y
  64. config HARDIRQS_SW_RESEND
  65. bool
  66. default y
  67. config GENERIC_IRQ_PROBE
  68. bool
  69. default y
  70. config RWSEM_GENERIC_SPINLOCK
  71. bool
  72. default y
  73. config RWSEM_XCHGADD_ALGORITHM
  74. bool
  75. config ARCH_HAS_ILOG2_U32
  76. bool
  77. default n
  78. config ARCH_HAS_ILOG2_U64
  79. bool
  80. default n
  81. config GENERIC_HWEIGHT
  82. bool
  83. default y
  84. config GENERIC_CALIBRATE_DELAY
  85. bool
  86. default y
  87. config GENERIC_BUST_SPINLOCK
  88. bool
  89. config ARCH_MAY_HAVE_PC_FDC
  90. bool
  91. config ZONE_DMA
  92. bool
  93. default y
  94. config GENERIC_ISA_DMA
  95. bool
  96. config FIQ
  97. bool
  98. config ARCH_MTD_XIP
  99. bool
  100. config VECTORS_BASE
  101. hex
  102. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  103. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  104. default 0x00000000
  105. help
  106. The base address of exception vectors.
  107. source "init/Kconfig"
  108. menu "System Type"
  109. choice
  110. prompt "ARM system type"
  111. default ARCH_VERSATILE
  112. config ARCH_AAEC2000
  113. bool "Agilent AAEC-2000 based"
  114. select ARM_AMBA
  115. help
  116. This enables support for systems based on the Agilent AAEC-2000
  117. config ARCH_INTEGRATOR
  118. bool "ARM Ltd. Integrator family"
  119. select ARM_AMBA
  120. select ICST525
  121. help
  122. Support for ARM's Integrator platform.
  123. config ARCH_REALVIEW
  124. bool "ARM Ltd. RealView family"
  125. select ARM_AMBA
  126. select ICST307
  127. help
  128. This enables support for ARM Ltd RealView boards.
  129. config ARCH_VERSATILE
  130. bool "ARM Ltd. Versatile family"
  131. select ARM_AMBA
  132. select ARM_VIC
  133. select ICST307
  134. help
  135. This enables support for ARM Ltd Versatile board.
  136. config ARCH_AT91
  137. bool "Atmel AT91"
  138. select GENERIC_GPIO
  139. help
  140. This enables support for systems based on the Atmel AT91RM9200
  141. and AT91SAM9xxx processors.
  142. config ARCH_CLPS7500
  143. bool "Cirrus CL-PS7500FE"
  144. select TIMER_ACORN
  145. select ISA
  146. select NO_IOPORT
  147. help
  148. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  149. config ARCH_CLPS711X
  150. bool "Cirrus Logic CLPS711x/EP721x-based"
  151. help
  152. Support for Cirrus Logic 711x/721x based boards.
  153. config ARCH_CO285
  154. bool "Co-EBSA285"
  155. select FOOTBRIDGE
  156. select FOOTBRIDGE_ADDIN
  157. help
  158. Support for Intel's EBSA285 companion chip.
  159. config ARCH_EBSA110
  160. bool "EBSA-110"
  161. select ISA
  162. select NO_IOPORT
  163. help
  164. This is an evaluation board for the StrongARM processor available
  165. from Digital. It has limited hardware on-board, including an
  166. Ethernet interface, two PCMCIA sockets, two serial ports and a
  167. parallel port.
  168. config ARCH_EP93XX
  169. bool "EP93xx-based"
  170. select ARM_AMBA
  171. select ARM_VIC
  172. help
  173. This enables support for the Cirrus EP93xx series of CPUs.
  174. config ARCH_FOOTBRIDGE
  175. bool "FootBridge"
  176. select FOOTBRIDGE
  177. help
  178. Support for systems based on the DC21285 companion chip
  179. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  180. config ARCH_NETX
  181. bool "Hilscher NetX based"
  182. select ARM_VIC
  183. help
  184. This enables support for systems based on the Hilscher NetX Soc
  185. config ARCH_H720X
  186. bool "Hynix HMS720x-based"
  187. select ISA_DMA_API
  188. help
  189. This enables support for systems based on the Hynix HMS720x
  190. config ARCH_IMX
  191. bool "IMX"
  192. help
  193. Support for Motorola's i.MX family of processors (MX1, MXL).
  194. config ARCH_IOP32X
  195. bool "IOP32x-based"
  196. depends on MMU
  197. select PLAT_IOP
  198. select PCI
  199. help
  200. Support for Intel's 80219 and IOP32X (XScale) family of
  201. processors.
  202. config ARCH_IOP33X
  203. bool "IOP33x-based"
  204. depends on MMU
  205. select PLAT_IOP
  206. select PCI
  207. help
  208. Support for Intel's IOP33X (XScale) family of processors.
  209. config ARCH_IOP13XX
  210. bool "IOP13xx-based"
  211. depends on MMU
  212. select PLAT_IOP
  213. select PCI
  214. help
  215. Support for Intel's IOP13XX (XScale) family of processors.
  216. config ARCH_IXP4XX
  217. bool "IXP4xx-based"
  218. depends on MMU
  219. select GENERIC_TIME
  220. help
  221. Support for Intel's IXP4XX (XScale) family of processors.
  222. config ARCH_IXP2000
  223. bool "IXP2400/2800-based"
  224. depends on MMU
  225. select PCI
  226. help
  227. Support for Intel's IXP2400/2800 (XScale) family of processors.
  228. config ARCH_IXP23XX
  229. bool "IXP23XX-based"
  230. depends on MMU
  231. select PCI
  232. help
  233. Support for Intel's IXP23xx (XScale) family of processors.
  234. config ARCH_L7200
  235. bool "LinkUp-L7200"
  236. select FIQ
  237. help
  238. Say Y here if you intend to run this kernel on a LinkUp Systems
  239. L7200 Software Development Board which uses an ARM720T processor.
  240. Information on this board can be obtained at:
  241. <http://www.linkupsys.com/>
  242. If you have any questions or comments about the Linux kernel port
  243. to this board, send e-mail to <sjhill@cotw.com>.
  244. config ARCH_NS9XXX
  245. bool "NetSilicon NS9xxx"
  246. help
  247. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  248. System.
  249. <http://www.digi.com/products/microprocessors/index.jsp>
  250. config ARCH_PNX4008
  251. bool "Philips Nexperia PNX4008 Mobile"
  252. help
  253. This enables support for Philips PNX4008 mobile platform.
  254. config ARCH_PXA
  255. bool "PXA2xx-based"
  256. depends on MMU
  257. select ARCH_MTD_XIP
  258. select GENERIC_GPIO
  259. select GENERIC_TIME
  260. help
  261. Support for Intel's PXA2XX processor line.
  262. config ARCH_RPC
  263. bool "RiscPC"
  264. select ARCH_ACORN
  265. select FIQ
  266. select TIMER_ACORN
  267. select ARCH_MAY_HAVE_PC_FDC
  268. select ISA_DMA_API
  269. select NO_IOPORT
  270. help
  271. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  272. CD-ROM interface, serial and parallel port, and the floppy drive.
  273. config ARCH_SA1100
  274. bool "SA1100-based"
  275. select ISA
  276. select ARCH_DISCONTIGMEM_ENABLE
  277. select ARCH_MTD_XIP
  278. select GENERIC_GPIO
  279. help
  280. Support for StrongARM 11x0 based boards.
  281. config ARCH_S3C2410
  282. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  283. select GENERIC_GPIO
  284. help
  285. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  286. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  287. the Samsung SMDK2410 development board (and derivatives).
  288. config ARCH_SHARK
  289. bool "Shark"
  290. select ISA
  291. select ISA_DMA
  292. select PCI
  293. help
  294. Support for the StrongARM based Digital DNARD machine, also known
  295. as "Shark" (<http://www.shark-linux.de/shark.html>).
  296. config ARCH_LH7A40X
  297. bool "Sharp LH7A40X"
  298. help
  299. Say Y here for systems based on one of the Sharp LH7A40X
  300. System on a Chip processors. These CPUs include an ARM922T
  301. core with a wide array of integrated devices for
  302. hand-held and low-power applications.
  303. config ARCH_OMAP
  304. bool "TI OMAP"
  305. select GENERIC_GPIO
  306. help
  307. Support for TI's OMAP platform (OMAP1 and OMAP2).
  308. endchoice
  309. source "arch/arm/mach-clps711x/Kconfig"
  310. source "arch/arm/mach-ep93xx/Kconfig"
  311. source "arch/arm/mach-footbridge/Kconfig"
  312. source "arch/arm/mach-integrator/Kconfig"
  313. source "arch/arm/mach-iop32x/Kconfig"
  314. source "arch/arm/mach-iop33x/Kconfig"
  315. source "arch/arm/mach-iop13xx/Kconfig"
  316. source "arch/arm/mach-ixp4xx/Kconfig"
  317. source "arch/arm/mach-ixp2000/Kconfig"
  318. source "arch/arm/mach-ixp23xx/Kconfig"
  319. source "arch/arm/mach-pxa/Kconfig"
  320. source "arch/arm/mach-sa1100/Kconfig"
  321. source "arch/arm/plat-omap/Kconfig"
  322. source "arch/arm/mach-omap1/Kconfig"
  323. source "arch/arm/mach-omap2/Kconfig"
  324. source "arch/arm/plat-s3c24xx/Kconfig"
  325. if ARCH_S3C2410
  326. source "arch/arm/mach-s3c2400/Kconfig"
  327. source "arch/arm/mach-s3c2410/Kconfig"
  328. source "arch/arm/mach-s3c2412/Kconfig"
  329. source "arch/arm/mach-s3c2440/Kconfig"
  330. source "arch/arm/mach-s3c2442/Kconfig"
  331. source "arch/arm/mach-s3c2443/Kconfig"
  332. endif
  333. source "arch/arm/mach-lh7a40x/Kconfig"
  334. source "arch/arm/mach-imx/Kconfig"
  335. source "arch/arm/mach-h720x/Kconfig"
  336. source "arch/arm/mach-versatile/Kconfig"
  337. source "arch/arm/mach-aaec2000/Kconfig"
  338. source "arch/arm/mach-realview/Kconfig"
  339. source "arch/arm/mach-at91/Kconfig"
  340. source "arch/arm/mach-netx/Kconfig"
  341. source "arch/arm/mach-ns9xxx/Kconfig"
  342. # Definitions to make life easier
  343. config ARCH_ACORN
  344. bool
  345. config PLAT_IOP
  346. bool
  347. source arch/arm/mm/Kconfig
  348. config IWMMXT
  349. bool "Enable iWMMXt support"
  350. depends on CPU_XSCALE || CPU_XSC3
  351. default y if PXA27x
  352. help
  353. Enable support for iWMMXt context switching at run time if
  354. running on a CPU that supports it.
  355. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  356. config XSCALE_PMU
  357. bool
  358. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  359. default y
  360. if !MMU
  361. source "arch/arm/Kconfig-nommu"
  362. endif
  363. endmenu
  364. source "arch/arm/common/Kconfig"
  365. config FORCE_MAX_ZONEORDER
  366. int
  367. depends on SA1111
  368. default "9"
  369. menu "Bus support"
  370. config ARM_AMBA
  371. bool
  372. config ISA
  373. bool
  374. help
  375. Find out whether you have ISA slots on your motherboard. ISA is the
  376. name of a bus system, i.e. the way the CPU talks to the other stuff
  377. inside your box. Other bus systems are PCI, EISA, MicroChannel
  378. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  379. newer boards don't support it. If you have ISA, say Y, otherwise N.
  380. # Select ISA DMA controller support
  381. config ISA_DMA
  382. bool
  383. select ISA_DMA_API
  384. # Select ISA DMA interface
  385. config ISA_DMA_API
  386. bool
  387. config PCI
  388. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
  389. help
  390. Find out whether you have a PCI motherboard. PCI is the name of a
  391. bus system, i.e. the way the CPU talks to the other stuff inside
  392. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  393. VESA. If you have PCI, say Y, otherwise N.
  394. The PCI-HOWTO, available from
  395. <http://www.tldp.org/docs.html#howto>, contains valuable
  396. information about which PCI hardware does work under Linux and which
  397. doesn't.
  398. # Select the host bridge type
  399. config PCI_HOST_VIA82C505
  400. bool
  401. depends on PCI && ARCH_SHARK
  402. default y
  403. source "drivers/pci/Kconfig"
  404. source "drivers/pcmcia/Kconfig"
  405. endmenu
  406. menu "Kernel Features"
  407. config SMP
  408. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  409. depends on EXPERIMENTAL && REALVIEW_MPCORE
  410. help
  411. This enables support for systems with more than one CPU. If you have
  412. a system with only one CPU, like most personal computers, say N. If
  413. you have a system with more than one CPU, say Y.
  414. If you say N here, the kernel will run on single and multiprocessor
  415. machines, but will use only one CPU of a multiprocessor machine. If
  416. you say Y here, the kernel will run on many, but not all, single
  417. processor machines. On a single processor machine, the kernel will
  418. run faster if you say N here.
  419. See also the <file:Documentation/smp.txt>,
  420. <file:Documentation/i386/IO-APIC.txt>,
  421. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  422. <http://www.linuxdoc.org/docs.html#howto>.
  423. If you don't know what to do here, say N.
  424. config NR_CPUS
  425. int "Maximum number of CPUs (2-32)"
  426. range 2 32
  427. depends on SMP
  428. default "4"
  429. config HOTPLUG_CPU
  430. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  431. depends on SMP && HOTPLUG && EXPERIMENTAL
  432. help
  433. Say Y here to experiment with turning CPUs off and on. CPUs
  434. can be controlled through /sys/devices/system/cpu.
  435. config LOCAL_TIMERS
  436. bool "Use local timer interrupts"
  437. depends on SMP && REALVIEW_MPCORE
  438. default y
  439. help
  440. Enable support for local timers on SMP platforms, rather then the
  441. legacy IPI broadcast method. Local timers allows the system
  442. accounting to be spread across the timer interval, preventing a
  443. "thundering herd" at every timer tick.
  444. config PREEMPT
  445. bool "Preemptible Kernel (EXPERIMENTAL)"
  446. depends on EXPERIMENTAL
  447. help
  448. This option reduces the latency of the kernel when reacting to
  449. real-time or interactive events by allowing a low priority process to
  450. be preempted even if it is in kernel mode executing a system call.
  451. This allows applications to run more reliably even when the system is
  452. under load.
  453. Say Y here if you are building a kernel for a desktop, embedded
  454. or real-time system. Say N if you are unsure.
  455. config NO_IDLE_HZ
  456. bool "Dynamic tick timer"
  457. help
  458. Select this option if you want to disable continuous timer ticks
  459. and have them programmed to occur as required. This option saves
  460. power as the system can remain in idle state for longer.
  461. By default dynamic tick is disabled during the boot, and can be
  462. manually enabled with:
  463. echo 1 > /sys/devices/system/timer/timer0/dyn_tick
  464. Alternatively, if you want dynamic tick automatically enabled
  465. during boot, pass "dyntick=enable" via the kernel command string.
  466. Please note that dynamic tick may affect the accuracy of
  467. timekeeping on some platforms depending on the implementation.
  468. Currently at least OMAP, PXA2xx and SA11x0 platforms are known
  469. to have accurate timekeeping with dynamic tick.
  470. config HZ
  471. int
  472. default 128 if ARCH_L7200
  473. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  474. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  475. default 100
  476. config AEABI
  477. bool "Use the ARM EABI to compile the kernel"
  478. help
  479. This option allows for the kernel to be compiled using the latest
  480. ARM ABI (aka EABI). This is only useful if you are using a user
  481. space environment that is also compiled with EABI.
  482. Since there are major incompatibilities between the legacy ABI and
  483. EABI, especially with regard to structure member alignment, this
  484. option also changes the kernel syscall calling convention to
  485. disambiguate both ABIs and allow for backward compatibility support
  486. (selected with CONFIG_OABI_COMPAT).
  487. To use this you need GCC version 4.0.0 or later.
  488. config OABI_COMPAT
  489. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  490. depends on AEABI && EXPERIMENTAL
  491. default y
  492. help
  493. This option preserves the old syscall interface along with the
  494. new (ARM EABI) one. It also provides a compatibility layer to
  495. intercept syscalls that have structure arguments which layout
  496. in memory differs between the legacy ABI and the new ARM EABI
  497. (only for non "thumb" binaries). This option adds a tiny
  498. overhead to all syscalls and produces a slightly larger kernel.
  499. If you know you'll be using only pure EABI user space then you
  500. can say N here. If this option is not selected and you attempt
  501. to execute a legacy ABI binary then the result will be
  502. UNPREDICTABLE (in fact it can be predicted that it won't work
  503. at all). If in doubt say Y.
  504. config ARCH_DISCONTIGMEM_ENABLE
  505. bool
  506. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  507. help
  508. Say Y to support efficient handling of discontiguous physical memory,
  509. for architectures which are either NUMA (Non-Uniform Memory Access)
  510. or have huge holes in the physical address space for other reasons.
  511. See <file:Documentation/vm/numa> for more.
  512. config NODES_SHIFT
  513. int
  514. default "4" if ARCH_LH7A40X
  515. default "2"
  516. depends on NEED_MULTIPLE_NODES
  517. source "mm/Kconfig"
  518. config LEDS
  519. bool "Timer and CPU usage LEDs"
  520. depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
  521. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  522. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  523. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  524. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  525. ARCH_AT91 || MACH_TRIZEPS4
  526. help
  527. If you say Y here, the LEDs on your machine will be used
  528. to provide useful information about your current system status.
  529. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  530. be able to select which LEDs are active using the options below. If
  531. you are compiling a kernel for the EBSA-110 or the LART however, the
  532. red LED will simply flash regularly to indicate that the system is
  533. still functional. It is safe to say Y here if you have a CATS
  534. system, but the driver will do nothing.
  535. config LEDS_TIMER
  536. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  537. MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  538. depends on LEDS
  539. default y if ARCH_EBSA110
  540. help
  541. If you say Y here, one of the system LEDs (the green one on the
  542. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  543. will flash regularly to indicate that the system is still
  544. operational. This is mainly useful to kernel hackers who are
  545. debugging unstable kernels.
  546. The LART uses the same LED for both Timer LED and CPU usage LED
  547. functions. You may choose to use both, but the Timer LED function
  548. will overrule the CPU usage LED.
  549. config LEDS_CPU
  550. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  551. !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  552. depends on LEDS
  553. help
  554. If you say Y here, the red LED will be used to give a good real
  555. time indication of CPU usage, by lighting whenever the idle task
  556. is not currently executing.
  557. The LART uses the same LED for both Timer LED and CPU usage LED
  558. functions. You may choose to use both, but the Timer LED function
  559. will overrule the CPU usage LED.
  560. config ALIGNMENT_TRAP
  561. bool
  562. depends on CPU_CP15_MMU
  563. default y if !ARCH_EBSA110
  564. help
  565. ARM processors cannot fetch/store information which is not
  566. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  567. address divisible by 4. On 32-bit ARM processors, these non-aligned
  568. fetch/store instructions will be emulated in software if you say
  569. here, which has a severe performance impact. This is necessary for
  570. correct operation of some network protocols. With an IP-only
  571. configuration it is safe to say N, otherwise say Y.
  572. endmenu
  573. menu "Boot options"
  574. # Compressed boot loader in ROM. Yes, we really want to ask about
  575. # TEXT and BSS so we preserve their values in the config files.
  576. config ZBOOT_ROM_TEXT
  577. hex "Compressed ROM boot loader base address"
  578. default "0"
  579. help
  580. The physical address at which the ROM-able zImage is to be
  581. placed in the target. Platforms which normally make use of
  582. ROM-able zImage formats normally set this to a suitable
  583. value in their defconfig file.
  584. If ZBOOT_ROM is not enabled, this has no effect.
  585. config ZBOOT_ROM_BSS
  586. hex "Compressed ROM boot loader BSS address"
  587. default "0"
  588. help
  589. The base address of an area of read/write memory in the target
  590. for the ROM-able zImage which must be available while the
  591. decompressor is running. It must be large enough to hold the
  592. entire decompressed kernel plus an additional 128 KiB.
  593. Platforms which normally make use of ROM-able zImage formats
  594. normally set this to a suitable value in their defconfig file.
  595. If ZBOOT_ROM is not enabled, this has no effect.
  596. config ZBOOT_ROM
  597. bool "Compressed boot loader in ROM/flash"
  598. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  599. help
  600. Say Y here if you intend to execute your compressed kernel image
  601. (zImage) directly from ROM or flash. If unsure, say N.
  602. config CMDLINE
  603. string "Default kernel command string"
  604. default ""
  605. help
  606. On some architectures (EBSA110 and CATS), there is currently no way
  607. for the boot loader to pass arguments to the kernel. For these
  608. architectures, you should supply some command-line options at build
  609. time by entering them here. As a minimum, you should specify the
  610. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  611. config XIP_KERNEL
  612. bool "Kernel Execute-In-Place from ROM"
  613. depends on !ZBOOT_ROM
  614. help
  615. Execute-In-Place allows the kernel to run from non-volatile storage
  616. directly addressable by the CPU, such as NOR flash. This saves RAM
  617. space since the text section of the kernel is not loaded from flash
  618. to RAM. Read-write sections, such as the data section and stack,
  619. are still copied to RAM. The XIP kernel is not compressed since
  620. it has to run directly from flash, so it will take more space to
  621. store it. The flash address used to link the kernel object files,
  622. and for storing it, is configuration dependent. Therefore, if you
  623. say Y here, you must know the proper physical address where to
  624. store the kernel image depending on your own flash memory usage.
  625. Also note that the make target becomes "make xipImage" rather than
  626. "make zImage" or "make Image". The final kernel binary to put in
  627. ROM memory will be arch/arm/boot/xipImage.
  628. If unsure, say N.
  629. config XIP_PHYS_ADDR
  630. hex "XIP Kernel Physical Location"
  631. depends on XIP_KERNEL
  632. default "0x00080000"
  633. help
  634. This is the physical address in your flash memory the kernel will
  635. be linked for and stored to. This address is dependent on your
  636. own flash usage.
  637. config KEXEC
  638. bool "Kexec system call (EXPERIMENTAL)"
  639. depends on EXPERIMENTAL
  640. help
  641. kexec is a system call that implements the ability to shutdown your
  642. current kernel, and to start another kernel. It is like a reboot
  643. but it is indepedent of the system firmware. And like a reboot
  644. you can start any kernel with it, not just Linux.
  645. It is an ongoing process to be certain the hardware in a machine
  646. is properly shutdown, so do not be surprised if this code does not
  647. initially work for you. It may help to enable device hotplugging
  648. support.
  649. endmenu
  650. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
  651. menu "CPU Frequency scaling"
  652. source "drivers/cpufreq/Kconfig"
  653. config CPU_FREQ_SA1100
  654. bool
  655. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  656. default y
  657. config CPU_FREQ_SA1110
  658. bool
  659. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  660. default y
  661. config CPU_FREQ_INTEGRATOR
  662. tristate "CPUfreq driver for ARM Integrator CPUs"
  663. depends on ARCH_INTEGRATOR && CPU_FREQ
  664. default y
  665. help
  666. This enables the CPUfreq driver for ARM Integrator CPUs.
  667. For details, take a look at <file:Documentation/cpu-freq>.
  668. If in doubt, say Y.
  669. config CPU_FREQ_IMX
  670. tristate "CPUfreq driver for i.MX CPUs"
  671. depends on ARCH_IMX && CPU_FREQ
  672. default n
  673. help
  674. This enables the CPUfreq driver for i.MX CPUs.
  675. If in doubt, say N.
  676. endmenu
  677. endif
  678. menu "Floating point emulation"
  679. comment "At least one emulation must be selected"
  680. config FPE_NWFPE
  681. bool "NWFPE math emulation"
  682. depends on !AEABI || OABI_COMPAT
  683. ---help---
  684. Say Y to include the NWFPE floating point emulator in the kernel.
  685. This is necessary to run most binaries. Linux does not currently
  686. support floating point hardware so you need to say Y here even if
  687. your machine has an FPA or floating point co-processor podule.
  688. You may say N here if you are going to load the Acorn FPEmulator
  689. early in the bootup.
  690. config FPE_NWFPE_XP
  691. bool "Support extended precision"
  692. depends on FPE_NWFPE
  693. help
  694. Say Y to include 80-bit support in the kernel floating-point
  695. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  696. Note that gcc does not generate 80-bit operations by default,
  697. so in most cases this option only enlarges the size of the
  698. floating point emulator without any good reason.
  699. You almost surely want to say N here.
  700. config FPE_FASTFPE
  701. bool "FastFPE math emulation (EXPERIMENTAL)"
  702. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  703. ---help---
  704. Say Y here to include the FAST floating point emulator in the kernel.
  705. This is an experimental much faster emulator which now also has full
  706. precision for the mantissa. It does not support any exceptions.
  707. It is very simple, and approximately 3-6 times faster than NWFPE.
  708. It should be sufficient for most programs. It may be not suitable
  709. for scientific calculations, but you have to check this for yourself.
  710. If you do not feel you need a faster FP emulation you should better
  711. choose NWFPE.
  712. config VFP
  713. bool "VFP-format floating point maths"
  714. depends on CPU_V6 || CPU_ARM926T
  715. help
  716. Say Y to include VFP support code in the kernel. This is needed
  717. if your hardware includes a VFP unit.
  718. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  719. release notes and additional status information.
  720. Say N if your target does not have VFP hardware.
  721. endmenu
  722. menu "Userspace binary formats"
  723. source "fs/Kconfig.binfmt"
  724. config ARTHUR
  725. tristate "RISC OS personality"
  726. depends on !AEABI
  727. help
  728. Say Y here to include the kernel code necessary if you want to run
  729. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  730. experimental; if this sounds frightening, say N and sleep in peace.
  731. You can also say M here to compile this support as a module (which
  732. will be called arthur).
  733. endmenu
  734. menu "Power management options"
  735. source "kernel/power/Kconfig"
  736. endmenu
  737. source "net/Kconfig"
  738. menu "Device Drivers"
  739. source "drivers/base/Kconfig"
  740. source "drivers/connector/Kconfig"
  741. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  742. source "drivers/mtd/Kconfig"
  743. endif
  744. source "drivers/parport/Kconfig"
  745. source "drivers/pnp/Kconfig"
  746. source "drivers/block/Kconfig"
  747. source "drivers/acorn/block/Kconfig"
  748. if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
  749. || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
  750. || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
  751. || ARCH_IXP23XX
  752. source "drivers/ide/Kconfig"
  753. endif
  754. source "drivers/scsi/Kconfig"
  755. source "drivers/ata/Kconfig"
  756. source "drivers/md/Kconfig"
  757. source "drivers/message/fusion/Kconfig"
  758. source "drivers/ieee1394/Kconfig"
  759. source "drivers/message/i2o/Kconfig"
  760. source "drivers/net/Kconfig"
  761. source "drivers/isdn/Kconfig"
  762. # input before char - char/joystick depends on it. As does USB.
  763. source "drivers/input/Kconfig"
  764. source "drivers/char/Kconfig"
  765. source "drivers/i2c/Kconfig"
  766. source "drivers/spi/Kconfig"
  767. source "drivers/w1/Kconfig"
  768. source "drivers/hwmon/Kconfig"
  769. #source "drivers/l3/Kconfig"
  770. source "drivers/misc/Kconfig"
  771. source "drivers/mfd/Kconfig"
  772. source "drivers/leds/Kconfig"
  773. source "drivers/media/Kconfig"
  774. source "drivers/video/Kconfig"
  775. source "sound/Kconfig"
  776. source "drivers/hid/Kconfig"
  777. source "drivers/usb/Kconfig"
  778. source "drivers/mmc/Kconfig"
  779. source "drivers/rtc/Kconfig"
  780. endmenu
  781. source "fs/Kconfig"
  782. source "arch/arm/oprofile/Kconfig"
  783. source "arch/arm/Kconfig.debug"
  784. source "security/Kconfig"
  785. source "crypto/Kconfig"
  786. source "lib/Kconfig"