Kconfig 32 KB

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  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. help
  20. The ARM series is a line of low-power-consumption RISC chip designs
  21. licensed by ARM Ltd and targeted at embedded applications and
  22. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  23. manufactured, but legacy ARM-based PC hardware remains popular in
  24. Europe. There is an ARM Linux project with a web page at
  25. <http://www.arm.linux.org.uk/>.
  26. config HAVE_PWM
  27. bool
  28. config SYS_SUPPORTS_APM_EMULATION
  29. bool
  30. config GENERIC_GPIO
  31. bool
  32. default n
  33. config GENERIC_TIME
  34. bool
  35. default n
  36. config GENERIC_CLOCKEVENTS
  37. bool
  38. default n
  39. config GENERIC_CLOCKEVENTS_BROADCAST
  40. bool
  41. depends on GENERIC_CLOCKEVENTS
  42. default y if SMP && !LOCAL_TIMERS
  43. config MMU
  44. bool
  45. default y
  46. config NO_IOPORT
  47. bool
  48. default n
  49. config EISA
  50. bool
  51. ---help---
  52. The Extended Industry Standard Architecture (EISA) bus was
  53. developed as an open alternative to the IBM MicroChannel bus.
  54. The EISA bus provided some of the features of the IBM MicroChannel
  55. bus while maintaining backward compatibility with cards made for
  56. the older ISA bus. The EISA bus saw limited use between 1988 and
  57. 1995 when it was made obsolete by the PCI bus.
  58. Say Y here if you are building a kernel for an EISA-based machine.
  59. Otherwise, say N.
  60. config SBUS
  61. bool
  62. config MCA
  63. bool
  64. help
  65. MicroChannel Architecture is found in some IBM PS/2 machines and
  66. laptops. It is a bus system similar to PCI or ISA. See
  67. <file:Documentation/mca.txt> (and especially the web page given
  68. there) before attempting to build an MCA bus kernel.
  69. config GENERIC_HARDIRQS
  70. bool
  71. default y
  72. config STACKTRACE_SUPPORT
  73. bool
  74. default y
  75. config HAVE_LATENCYTOP_SUPPORT
  76. bool
  77. depends on !SMP
  78. default y
  79. config LOCKDEP_SUPPORT
  80. bool
  81. default y
  82. config TRACE_IRQFLAGS_SUPPORT
  83. bool
  84. default y
  85. config HARDIRQS_SW_RESEND
  86. bool
  87. default y
  88. config GENERIC_IRQ_PROBE
  89. bool
  90. default y
  91. config GENERIC_LOCKBREAK
  92. bool
  93. default y
  94. depends on SMP && PREEMPT
  95. config RWSEM_GENERIC_SPINLOCK
  96. bool
  97. default y
  98. config RWSEM_XCHGADD_ALGORITHM
  99. bool
  100. config ARCH_HAS_ILOG2_U32
  101. bool
  102. default n
  103. config ARCH_HAS_ILOG2_U64
  104. bool
  105. default n
  106. config GENERIC_HWEIGHT
  107. bool
  108. default y
  109. config GENERIC_CALIBRATE_DELAY
  110. bool
  111. default y
  112. config ARCH_MAY_HAVE_PC_FDC
  113. bool
  114. config ZONE_DMA
  115. bool
  116. config GENERIC_ISA_DMA
  117. bool
  118. config FIQ
  119. bool
  120. config ARCH_MTD_XIP
  121. bool
  122. config GENERIC_HARDIRQS_NO__DO_IRQ
  123. bool
  124. def_bool y
  125. if OPROFILE
  126. config OPROFILE_ARMV6
  127. def_bool y
  128. depends on CPU_V6 && !SMP
  129. select OPROFILE_ARM11_CORE
  130. config OPROFILE_MPCORE
  131. def_bool y
  132. depends on CPU_V6 && SMP
  133. select OPROFILE_ARM11_CORE
  134. config OPROFILE_ARM11_CORE
  135. bool
  136. config OPROFILE_ARMV7
  137. def_bool y
  138. depends on CPU_V7 && !SMP
  139. bool
  140. endif
  141. config VECTORS_BASE
  142. hex
  143. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  144. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  145. default 0x00000000
  146. help
  147. The base address of exception vectors.
  148. source "init/Kconfig"
  149. source "kernel/Kconfig.freezer"
  150. menu "System Type"
  151. choice
  152. prompt "ARM system type"
  153. default ARCH_VERSATILE
  154. config ARCH_AAEC2000
  155. bool "Agilent AAEC-2000 based"
  156. select CPU_ARM920T
  157. select ARM_AMBA
  158. select HAVE_CLK
  159. help
  160. This enables support for systems based on the Agilent AAEC-2000
  161. config ARCH_INTEGRATOR
  162. bool "ARM Ltd. Integrator family"
  163. select ARM_AMBA
  164. select HAVE_CLK
  165. select COMMON_CLKDEV
  166. select ICST525
  167. help
  168. Support for ARM's Integrator platform.
  169. config ARCH_REALVIEW
  170. bool "ARM Ltd. RealView family"
  171. select ARM_AMBA
  172. select HAVE_CLK
  173. select COMMON_CLKDEV
  174. select ICST307
  175. select GENERIC_TIME
  176. select GENERIC_CLOCKEVENTS
  177. help
  178. This enables support for ARM Ltd RealView boards.
  179. config ARCH_VERSATILE
  180. bool "ARM Ltd. Versatile family"
  181. select ARM_AMBA
  182. select ARM_VIC
  183. select HAVE_CLK
  184. select COMMON_CLKDEV
  185. select ICST307
  186. select GENERIC_TIME
  187. select GENERIC_CLOCKEVENTS
  188. help
  189. This enables support for ARM Ltd Versatile board.
  190. config ARCH_AT91
  191. bool "Atmel AT91"
  192. select GENERIC_GPIO
  193. select HAVE_CLK
  194. help
  195. This enables support for systems based on the Atmel AT91RM9200,
  196. AT91SAM9 and AT91CAP9 processors.
  197. config ARCH_CLPS711X
  198. bool "Cirrus Logic CLPS711x/EP721x-based"
  199. select CPU_ARM720T
  200. help
  201. Support for Cirrus Logic 711x/721x based boards.
  202. config ARCH_EBSA110
  203. bool "EBSA-110"
  204. select CPU_SA110
  205. select ISA
  206. select NO_IOPORT
  207. help
  208. This is an evaluation board for the StrongARM processor available
  209. from Digital. It has limited hardware on-board, including an
  210. Ethernet interface, two PCMCIA sockets, two serial ports and a
  211. parallel port.
  212. config ARCH_EP93XX
  213. bool "EP93xx-based"
  214. select CPU_ARM920T
  215. select ARM_AMBA
  216. select ARM_VIC
  217. select GENERIC_GPIO
  218. select HAVE_CLK
  219. select COMMON_CLKDEV
  220. select ARCH_REQUIRE_GPIOLIB
  221. help
  222. This enables support for the Cirrus EP93xx series of CPUs.
  223. config ARCH_FOOTBRIDGE
  224. bool "FootBridge"
  225. select CPU_SA110
  226. select FOOTBRIDGE
  227. help
  228. Support for systems based on the DC21285 companion chip
  229. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  230. config ARCH_NETX
  231. bool "Hilscher NetX based"
  232. select CPU_ARM926T
  233. select ARM_VIC
  234. help
  235. This enables support for systems based on the Hilscher NetX Soc
  236. config ARCH_H720X
  237. bool "Hynix HMS720x-based"
  238. select CPU_ARM720T
  239. select ISA_DMA_API
  240. help
  241. This enables support for systems based on the Hynix HMS720x
  242. config ARCH_IMX
  243. bool "IMX"
  244. select CPU_ARM920T
  245. select GENERIC_GPIO
  246. select GENERIC_TIME
  247. select GENERIC_CLOCKEVENTS
  248. help
  249. Support for Motorola's i.MX family of processors (MX1, MXL).
  250. config ARCH_IOP13XX
  251. bool "IOP13xx-based"
  252. depends on MMU
  253. select CPU_XSC3
  254. select PLAT_IOP
  255. select PCI
  256. select ARCH_SUPPORTS_MSI
  257. select VMSPLIT_1G
  258. help
  259. Support for Intel's IOP13XX (XScale) family of processors.
  260. config ARCH_IOP32X
  261. bool "IOP32x-based"
  262. depends on MMU
  263. select CPU_XSCALE
  264. select PLAT_IOP
  265. select PCI
  266. select GENERIC_GPIO
  267. select ARCH_REQUIRE_GPIOLIB
  268. help
  269. Support for Intel's 80219 and IOP32X (XScale) family of
  270. processors.
  271. config ARCH_IOP33X
  272. bool "IOP33x-based"
  273. depends on MMU
  274. select CPU_XSCALE
  275. select PLAT_IOP
  276. select PCI
  277. select GENERIC_GPIO
  278. select ARCH_REQUIRE_GPIOLIB
  279. help
  280. Support for Intel's IOP33X (XScale) family of processors.
  281. config ARCH_IXP23XX
  282. bool "IXP23XX-based"
  283. depends on MMU
  284. select CPU_XSC3
  285. select PCI
  286. help
  287. Support for Intel's IXP23xx (XScale) family of processors.
  288. config ARCH_IXP2000
  289. bool "IXP2400/2800-based"
  290. depends on MMU
  291. select CPU_XSCALE
  292. select PCI
  293. help
  294. Support for Intel's IXP2400/2800 (XScale) family of processors.
  295. config ARCH_IXP4XX
  296. bool "IXP4xx-based"
  297. depends on MMU
  298. select CPU_XSCALE
  299. select GENERIC_GPIO
  300. select GENERIC_TIME
  301. select GENERIC_CLOCKEVENTS
  302. select DMABOUNCE if PCI
  303. help
  304. Support for Intel's IXP4XX (XScale) family of processors.
  305. config ARCH_L7200
  306. bool "LinkUp-L7200"
  307. select CPU_ARM720T
  308. select FIQ
  309. help
  310. Say Y here if you intend to run this kernel on a LinkUp Systems
  311. L7200 Software Development Board which uses an ARM720T processor.
  312. Information on this board can be obtained at:
  313. <http://www.linkupsys.com/>
  314. If you have any questions or comments about the Linux kernel port
  315. to this board, send e-mail to <sjhill@cotw.com>.
  316. config ARCH_KIRKWOOD
  317. bool "Marvell Kirkwood"
  318. select CPU_FEROCEON
  319. select PCI
  320. select GENERIC_TIME
  321. select GENERIC_CLOCKEVENTS
  322. select PLAT_ORION
  323. help
  324. Support for the following Marvell Kirkwood series SoCs:
  325. 88F6180, 88F6192 and 88F6281.
  326. config ARCH_KS8695
  327. bool "Micrel/Kendin KS8695"
  328. select CPU_ARM922T
  329. select GENERIC_GPIO
  330. help
  331. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  332. System-on-Chip devices.
  333. config ARCH_NS9XXX
  334. bool "NetSilicon NS9xxx"
  335. select CPU_ARM926T
  336. select GENERIC_GPIO
  337. select GENERIC_TIME
  338. select GENERIC_CLOCKEVENTS
  339. select HAVE_CLK
  340. help
  341. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  342. System.
  343. <http://www.digi.com/products/microprocessors/index.jsp>
  344. config ARCH_LOKI
  345. bool "Marvell Loki (88RC8480)"
  346. select CPU_FEROCEON
  347. select GENERIC_TIME
  348. select GENERIC_CLOCKEVENTS
  349. select PLAT_ORION
  350. help
  351. Support for the Marvell Loki (88RC8480) SoC.
  352. config ARCH_MV78XX0
  353. bool "Marvell MV78xx0"
  354. select CPU_FEROCEON
  355. select PCI
  356. select GENERIC_TIME
  357. select GENERIC_CLOCKEVENTS
  358. select PLAT_ORION
  359. help
  360. Support for the following Marvell MV78xx0 series SoCs:
  361. MV781x0, MV782x0.
  362. config ARCH_MXC
  363. bool "Freescale MXC/iMX-based"
  364. select GENERIC_TIME
  365. select GENERIC_CLOCKEVENTS
  366. select ARCH_MTD_XIP
  367. select GENERIC_GPIO
  368. select ARCH_REQUIRE_GPIOLIB
  369. help
  370. Support for Freescale MXC/iMX-based family of processors
  371. config ARCH_ORION5X
  372. bool "Marvell Orion"
  373. depends on MMU
  374. select CPU_FEROCEON
  375. select PCI
  376. select GENERIC_GPIO
  377. select GENERIC_TIME
  378. select GENERIC_CLOCKEVENTS
  379. select PLAT_ORION
  380. help
  381. Support for the following Marvell Orion 5x series SoCs:
  382. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  383. Orion-2 (5281), Orion-1-90 (6183).
  384. config ARCH_PNX4008
  385. bool "Philips Nexperia PNX4008 Mobile"
  386. select CPU_ARM926T
  387. select HAVE_CLK
  388. help
  389. This enables support for Philips PNX4008 mobile platform.
  390. config ARCH_PXA
  391. bool "PXA2xx/PXA3xx-based"
  392. depends on MMU
  393. select ARCH_MTD_XIP
  394. select GENERIC_GPIO
  395. select HAVE_CLK
  396. select COMMON_CLKDEV
  397. select ARCH_REQUIRE_GPIOLIB
  398. select GENERIC_TIME
  399. select GENERIC_CLOCKEVENTS
  400. select TICK_ONESHOT
  401. help
  402. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  403. config ARCH_RPC
  404. bool "RiscPC"
  405. select ARCH_ACORN
  406. select FIQ
  407. select TIMER_ACORN
  408. select ARCH_MAY_HAVE_PC_FDC
  409. select HAVE_PATA_PLATFORM
  410. select ISA_DMA_API
  411. select NO_IOPORT
  412. select ARCH_SPARSEMEM_ENABLE
  413. help
  414. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  415. CD-ROM interface, serial and parallel port, and the floppy drive.
  416. config ARCH_SA1100
  417. bool "SA1100-based"
  418. select CPU_SA1100
  419. select ISA
  420. select ARCH_SPARSEMEM_ENABLE
  421. select ARCH_MTD_XIP
  422. select GENERIC_GPIO
  423. select GENERIC_TIME
  424. select GENERIC_CLOCKEVENTS
  425. select HAVE_CLK
  426. select TICK_ONESHOT
  427. select ARCH_REQUIRE_GPIOLIB
  428. help
  429. Support for StrongARM 11x0 based boards.
  430. config ARCH_S3C2410
  431. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  432. select GENERIC_GPIO
  433. select HAVE_CLK
  434. help
  435. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  436. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  437. the Samsung SMDK2410 development board (and derivatives).
  438. config ARCH_S3C64XX
  439. bool "Samsung S3C64XX"
  440. select GENERIC_GPIO
  441. select HAVE_CLK
  442. help
  443. Samsung S3C64XX series based systems
  444. config ARCH_SHARK
  445. bool "Shark"
  446. select CPU_SA110
  447. select ISA
  448. select ISA_DMA
  449. select ZONE_DMA
  450. select PCI
  451. help
  452. Support for the StrongARM based Digital DNARD machine, also known
  453. as "Shark" (<http://www.shark-linux.de/shark.html>).
  454. config ARCH_LH7A40X
  455. bool "Sharp LH7A40X"
  456. select CPU_ARM922T
  457. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  458. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  459. help
  460. Say Y here for systems based on one of the Sharp LH7A40X
  461. System on a Chip processors. These CPUs include an ARM922T
  462. core with a wide array of integrated devices for
  463. hand-held and low-power applications.
  464. config ARCH_DAVINCI
  465. bool "TI DaVinci"
  466. select CPU_ARM926T
  467. select GENERIC_TIME
  468. select GENERIC_CLOCKEVENTS
  469. select GENERIC_GPIO
  470. select ARCH_REQUIRE_GPIOLIB
  471. select HAVE_CLK
  472. select ZONE_DMA
  473. help
  474. Support for TI's DaVinci platform.
  475. config ARCH_OMAP
  476. bool "TI OMAP"
  477. select GENERIC_GPIO
  478. select HAVE_CLK
  479. select ARCH_REQUIRE_GPIOLIB
  480. select GENERIC_TIME
  481. select GENERIC_CLOCKEVENTS
  482. help
  483. Support for TI's OMAP platform (OMAP1 and OMAP2).
  484. config ARCH_MSM
  485. bool "Qualcomm MSM"
  486. select CPU_V6
  487. select GENERIC_TIME
  488. select GENERIC_CLOCKEVENTS
  489. help
  490. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  491. apps processor of the MSM7K and depends on a shared memory
  492. interface to the ARM9 modem processor which runs the baseband stack
  493. and controls some vital subsystems (clock and power control, etc).
  494. config ARCH_W90X900
  495. bool "Nuvoton W90X900 CPU"
  496. select CPU_ARM926T
  497. help
  498. Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
  499. can login www.mcuos.com or www.nuvoton.com to know more.
  500. endchoice
  501. source "arch/arm/mach-clps711x/Kconfig"
  502. source "arch/arm/mach-ep93xx/Kconfig"
  503. source "arch/arm/mach-footbridge/Kconfig"
  504. source "arch/arm/mach-integrator/Kconfig"
  505. source "arch/arm/mach-iop32x/Kconfig"
  506. source "arch/arm/mach-iop33x/Kconfig"
  507. source "arch/arm/mach-iop13xx/Kconfig"
  508. source "arch/arm/mach-ixp4xx/Kconfig"
  509. source "arch/arm/mach-ixp2000/Kconfig"
  510. source "arch/arm/mach-ixp23xx/Kconfig"
  511. source "arch/arm/mach-loki/Kconfig"
  512. source "arch/arm/mach-mv78xx0/Kconfig"
  513. source "arch/arm/mach-pxa/Kconfig"
  514. source "arch/arm/mach-sa1100/Kconfig"
  515. source "arch/arm/plat-omap/Kconfig"
  516. source "arch/arm/mach-omap1/Kconfig"
  517. source "arch/arm/mach-omap2/Kconfig"
  518. source "arch/arm/mach-orion5x/Kconfig"
  519. source "arch/arm/mach-kirkwood/Kconfig"
  520. source "arch/arm/plat-s3c24xx/Kconfig"
  521. source "arch/arm/plat-s3c64xx/Kconfig"
  522. source "arch/arm/plat-s3c/Kconfig"
  523. if ARCH_S3C2410
  524. source "arch/arm/mach-s3c2400/Kconfig"
  525. source "arch/arm/mach-s3c2410/Kconfig"
  526. source "arch/arm/mach-s3c2412/Kconfig"
  527. source "arch/arm/mach-s3c2440/Kconfig"
  528. source "arch/arm/mach-s3c2442/Kconfig"
  529. source "arch/arm/mach-s3c2443/Kconfig"
  530. endif
  531. if ARCH_S3C64XX
  532. source "arch/arm/mach-s3c6400/Kconfig"
  533. source "arch/arm/mach-s3c6410/Kconfig"
  534. endif
  535. source "arch/arm/mach-lh7a40x/Kconfig"
  536. source "arch/arm/mach-imx/Kconfig"
  537. source "arch/arm/mach-h720x/Kconfig"
  538. source "arch/arm/mach-versatile/Kconfig"
  539. source "arch/arm/mach-aaec2000/Kconfig"
  540. source "arch/arm/mach-realview/Kconfig"
  541. source "arch/arm/mach-at91/Kconfig"
  542. source "arch/arm/plat-mxc/Kconfig"
  543. source "arch/arm/mach-netx/Kconfig"
  544. source "arch/arm/mach-ns9xxx/Kconfig"
  545. source "arch/arm/mach-davinci/Kconfig"
  546. source "arch/arm/mach-ks8695/Kconfig"
  547. source "arch/arm/mach-msm/Kconfig"
  548. source "arch/arm/mach-w90x900/Kconfig"
  549. # Definitions to make life easier
  550. config ARCH_ACORN
  551. bool
  552. config PLAT_IOP
  553. bool
  554. config PLAT_ORION
  555. bool
  556. source arch/arm/mm/Kconfig
  557. config IWMMXT
  558. bool "Enable iWMMXt support"
  559. depends on CPU_XSCALE || CPU_XSC3
  560. default y if PXA27x || PXA3xx
  561. help
  562. Enable support for iWMMXt context switching at run time if
  563. running on a CPU that supports it.
  564. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  565. config XSCALE_PMU
  566. bool
  567. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  568. default y
  569. if !MMU
  570. source "arch/arm/Kconfig-nommu"
  571. endif
  572. endmenu
  573. source "arch/arm/common/Kconfig"
  574. config FORCE_MAX_ZONEORDER
  575. int
  576. depends on SA1111
  577. default "9"
  578. menu "Bus support"
  579. config ARM_AMBA
  580. bool
  581. config ISA
  582. bool
  583. help
  584. Find out whether you have ISA slots on your motherboard. ISA is the
  585. name of a bus system, i.e. the way the CPU talks to the other stuff
  586. inside your box. Other bus systems are PCI, EISA, MicroChannel
  587. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  588. newer boards don't support it. If you have ISA, say Y, otherwise N.
  589. # Select ISA DMA controller support
  590. config ISA_DMA
  591. bool
  592. select ISA_DMA_API
  593. # Select ISA DMA interface
  594. config ISA_DMA_API
  595. bool
  596. config PCI
  597. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  598. help
  599. Find out whether you have a PCI motherboard. PCI is the name of a
  600. bus system, i.e. the way the CPU talks to the other stuff inside
  601. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  602. VESA. If you have PCI, say Y, otherwise N.
  603. config PCI_SYSCALL
  604. def_bool PCI
  605. # Select the host bridge type
  606. config PCI_HOST_VIA82C505
  607. bool
  608. depends on PCI && ARCH_SHARK
  609. default y
  610. config PCI_HOST_ITE8152
  611. bool
  612. depends on PCI && MACH_ARMCORE
  613. default y
  614. select DMABOUNCE
  615. source "drivers/pci/Kconfig"
  616. source "drivers/pcmcia/Kconfig"
  617. endmenu
  618. menu "Kernel Features"
  619. source "kernel/time/Kconfig"
  620. config SMP
  621. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  622. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  623. select USE_GENERIC_SMP_HELPERS
  624. help
  625. This enables support for systems with more than one CPU. If you have
  626. a system with only one CPU, like most personal computers, say N. If
  627. you have a system with more than one CPU, say Y.
  628. If you say N here, the kernel will run on single and multiprocessor
  629. machines, but will use only one CPU of a multiprocessor machine. If
  630. you say Y here, the kernel will run on many, but not all, single
  631. processor machines. On a single processor machine, the kernel will
  632. run faster if you say N here.
  633. See also <file:Documentation/i386/IO-APIC.txt>,
  634. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  635. <http://www.linuxdoc.org/docs.html#howto>.
  636. If you don't know what to do here, say N.
  637. choice
  638. prompt "Memory split"
  639. default VMSPLIT_3G
  640. help
  641. Select the desired split between kernel and user memory.
  642. If you are not absolutely sure what you are doing, leave this
  643. option alone!
  644. config VMSPLIT_3G
  645. bool "3G/1G user/kernel split"
  646. config VMSPLIT_2G
  647. bool "2G/2G user/kernel split"
  648. config VMSPLIT_1G
  649. bool "1G/3G user/kernel split"
  650. endchoice
  651. config PAGE_OFFSET
  652. hex
  653. default 0x40000000 if VMSPLIT_1G
  654. default 0x80000000 if VMSPLIT_2G
  655. default 0xC0000000
  656. config NR_CPUS
  657. int "Maximum number of CPUs (2-32)"
  658. range 2 32
  659. depends on SMP
  660. default "4"
  661. config HOTPLUG_CPU
  662. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  663. depends on SMP && HOTPLUG && EXPERIMENTAL
  664. help
  665. Say Y here to experiment with turning CPUs off and on. CPUs
  666. can be controlled through /sys/devices/system/cpu.
  667. config LOCAL_TIMERS
  668. bool "Use local timer interrupts"
  669. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
  670. default y
  671. help
  672. Enable support for local timers on SMP platforms, rather then the
  673. legacy IPI broadcast method. Local timers allows the system
  674. accounting to be spread across the timer interval, preventing a
  675. "thundering herd" at every timer tick.
  676. config PREEMPT
  677. bool "Preemptible Kernel (EXPERIMENTAL)"
  678. depends on EXPERIMENTAL
  679. help
  680. This option reduces the latency of the kernel when reacting to
  681. real-time or interactive events by allowing a low priority process to
  682. be preempted even if it is in kernel mode executing a system call.
  683. This allows applications to run more reliably even when the system is
  684. under load.
  685. Say Y here if you are building a kernel for a desktop, embedded
  686. or real-time system. Say N if you are unsure.
  687. config HZ
  688. int
  689. default 128 if ARCH_L7200
  690. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  691. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  692. default AT91_TIMER_HZ if ARCH_AT91
  693. default 100
  694. config AEABI
  695. bool "Use the ARM EABI to compile the kernel"
  696. help
  697. This option allows for the kernel to be compiled using the latest
  698. ARM ABI (aka EABI). This is only useful if you are using a user
  699. space environment that is also compiled with EABI.
  700. Since there are major incompatibilities between the legacy ABI and
  701. EABI, especially with regard to structure member alignment, this
  702. option also changes the kernel syscall calling convention to
  703. disambiguate both ABIs and allow for backward compatibility support
  704. (selected with CONFIG_OABI_COMPAT).
  705. To use this you need GCC version 4.0.0 or later.
  706. config OABI_COMPAT
  707. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  708. depends on AEABI && EXPERIMENTAL
  709. default y
  710. help
  711. This option preserves the old syscall interface along with the
  712. new (ARM EABI) one. It also provides a compatibility layer to
  713. intercept syscalls that have structure arguments which layout
  714. in memory differs between the legacy ABI and the new ARM EABI
  715. (only for non "thumb" binaries). This option adds a tiny
  716. overhead to all syscalls and produces a slightly larger kernel.
  717. If you know you'll be using only pure EABI user space then you
  718. can say N here. If this option is not selected and you attempt
  719. to execute a legacy ABI binary then the result will be
  720. UNPREDICTABLE (in fact it can be predicted that it won't work
  721. at all). If in doubt say Y.
  722. config ARCH_FLATMEM_HAS_HOLES
  723. bool
  724. default y
  725. depends on FLATMEM
  726. # Discontigmem is deprecated
  727. config ARCH_DISCONTIGMEM_ENABLE
  728. bool
  729. config ARCH_SPARSEMEM_ENABLE
  730. bool
  731. config ARCH_SPARSEMEM_DEFAULT
  732. def_bool ARCH_SPARSEMEM_ENABLE
  733. config ARCH_SELECT_MEMORY_MODEL
  734. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  735. config NODES_SHIFT
  736. int
  737. default "4" if ARCH_LH7A40X
  738. default "2"
  739. depends on NEED_MULTIPLE_NODES
  740. source "mm/Kconfig"
  741. config LEDS
  742. bool "Timer and CPU usage LEDs"
  743. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  744. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  745. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  746. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  747. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  748. ARCH_AT91 || ARCH_DAVINCI || \
  749. ARCH_KS8695 || MACH_RD88F5182
  750. help
  751. If you say Y here, the LEDs on your machine will be used
  752. to provide useful information about your current system status.
  753. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  754. be able to select which LEDs are active using the options below. If
  755. you are compiling a kernel for the EBSA-110 or the LART however, the
  756. red LED will simply flash regularly to indicate that the system is
  757. still functional. It is safe to say Y here if you have a CATS
  758. system, but the driver will do nothing.
  759. config LEDS_TIMER
  760. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  761. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  762. || MACH_OMAP_PERSEUS2
  763. depends on LEDS
  764. depends on !GENERIC_CLOCKEVENTS
  765. default y if ARCH_EBSA110
  766. help
  767. If you say Y here, one of the system LEDs (the green one on the
  768. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  769. will flash regularly to indicate that the system is still
  770. operational. This is mainly useful to kernel hackers who are
  771. debugging unstable kernels.
  772. The LART uses the same LED for both Timer LED and CPU usage LED
  773. functions. You may choose to use both, but the Timer LED function
  774. will overrule the CPU usage LED.
  775. config LEDS_CPU
  776. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  777. !ARCH_OMAP) \
  778. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  779. || MACH_OMAP_PERSEUS2
  780. depends on LEDS
  781. help
  782. If you say Y here, the red LED will be used to give a good real
  783. time indication of CPU usage, by lighting whenever the idle task
  784. is not currently executing.
  785. The LART uses the same LED for both Timer LED and CPU usage LED
  786. functions. You may choose to use both, but the Timer LED function
  787. will overrule the CPU usage LED.
  788. config ALIGNMENT_TRAP
  789. bool
  790. depends on CPU_CP15_MMU
  791. default y if !ARCH_EBSA110
  792. help
  793. ARM processors cannot fetch/store information which is not
  794. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  795. address divisible by 4. On 32-bit ARM processors, these non-aligned
  796. fetch/store instructions will be emulated in software if you say
  797. here, which has a severe performance impact. This is necessary for
  798. correct operation of some network protocols. With an IP-only
  799. configuration it is safe to say N, otherwise say Y.
  800. endmenu
  801. menu "Boot options"
  802. # Compressed boot loader in ROM. Yes, we really want to ask about
  803. # TEXT and BSS so we preserve their values in the config files.
  804. config ZBOOT_ROM_TEXT
  805. hex "Compressed ROM boot loader base address"
  806. default "0"
  807. help
  808. The physical address at which the ROM-able zImage is to be
  809. placed in the target. Platforms which normally make use of
  810. ROM-able zImage formats normally set this to a suitable
  811. value in their defconfig file.
  812. If ZBOOT_ROM is not enabled, this has no effect.
  813. config ZBOOT_ROM_BSS
  814. hex "Compressed ROM boot loader BSS address"
  815. default "0"
  816. help
  817. The base address of an area of read/write memory in the target
  818. for the ROM-able zImage which must be available while the
  819. decompressor is running. It must be large enough to hold the
  820. entire decompressed kernel plus an additional 128 KiB.
  821. Platforms which normally make use of ROM-able zImage formats
  822. normally set this to a suitable value in their defconfig file.
  823. If ZBOOT_ROM is not enabled, this has no effect.
  824. config ZBOOT_ROM
  825. bool "Compressed boot loader in ROM/flash"
  826. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  827. help
  828. Say Y here if you intend to execute your compressed kernel image
  829. (zImage) directly from ROM or flash. If unsure, say N.
  830. config CMDLINE
  831. string "Default kernel command string"
  832. default ""
  833. help
  834. On some architectures (EBSA110 and CATS), there is currently no way
  835. for the boot loader to pass arguments to the kernel. For these
  836. architectures, you should supply some command-line options at build
  837. time by entering them here. As a minimum, you should specify the
  838. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  839. config XIP_KERNEL
  840. bool "Kernel Execute-In-Place from ROM"
  841. depends on !ZBOOT_ROM
  842. help
  843. Execute-In-Place allows the kernel to run from non-volatile storage
  844. directly addressable by the CPU, such as NOR flash. This saves RAM
  845. space since the text section of the kernel is not loaded from flash
  846. to RAM. Read-write sections, such as the data section and stack,
  847. are still copied to RAM. The XIP kernel is not compressed since
  848. it has to run directly from flash, so it will take more space to
  849. store it. The flash address used to link the kernel object files,
  850. and for storing it, is configuration dependent. Therefore, if you
  851. say Y here, you must know the proper physical address where to
  852. store the kernel image depending on your own flash memory usage.
  853. Also note that the make target becomes "make xipImage" rather than
  854. "make zImage" or "make Image". The final kernel binary to put in
  855. ROM memory will be arch/arm/boot/xipImage.
  856. If unsure, say N.
  857. config XIP_PHYS_ADDR
  858. hex "XIP Kernel Physical Location"
  859. depends on XIP_KERNEL
  860. default "0x00080000"
  861. help
  862. This is the physical address in your flash memory the kernel will
  863. be linked for and stored to. This address is dependent on your
  864. own flash usage.
  865. config KEXEC
  866. bool "Kexec system call (EXPERIMENTAL)"
  867. depends on EXPERIMENTAL
  868. help
  869. kexec is a system call that implements the ability to shutdown your
  870. current kernel, and to start another kernel. It is like a reboot
  871. but it is independent of the system firmware. And like a reboot
  872. you can start any kernel with it, not just Linux.
  873. It is an ongoing process to be certain the hardware in a machine
  874. is properly shutdown, so do not be surprised if this code does not
  875. initially work for you. It may help to enable device hotplugging
  876. support.
  877. config ATAGS_PROC
  878. bool "Export atags in procfs"
  879. depends on KEXEC
  880. default y
  881. help
  882. Should the atags used to boot the kernel be exported in an "atags"
  883. file in procfs. Useful with kexec.
  884. endmenu
  885. menu "CPU Power Management"
  886. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
  887. source "drivers/cpufreq/Kconfig"
  888. config CPU_FREQ_SA1100
  889. bool
  890. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  891. default y
  892. config CPU_FREQ_SA1110
  893. bool
  894. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  895. default y
  896. config CPU_FREQ_INTEGRATOR
  897. tristate "CPUfreq driver for ARM Integrator CPUs"
  898. depends on ARCH_INTEGRATOR && CPU_FREQ
  899. default y
  900. help
  901. This enables the CPUfreq driver for ARM Integrator CPUs.
  902. For details, take a look at <file:Documentation/cpu-freq>.
  903. If in doubt, say Y.
  904. config CPU_FREQ_IMX
  905. tristate "CPUfreq driver for i.MX CPUs"
  906. depends on ARCH_IMX && CPU_FREQ
  907. default n
  908. help
  909. This enables the CPUfreq driver for i.MX CPUs.
  910. If in doubt, say N.
  911. config CPU_FREQ_PXA
  912. bool
  913. depends on CPU_FREQ && ARCH_PXA && PXA25x
  914. default y
  915. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  916. endif
  917. source "drivers/cpuidle/Kconfig"
  918. endmenu
  919. menu "Floating point emulation"
  920. comment "At least one emulation must be selected"
  921. config FPE_NWFPE
  922. bool "NWFPE math emulation"
  923. depends on !AEABI || OABI_COMPAT
  924. ---help---
  925. Say Y to include the NWFPE floating point emulator in the kernel.
  926. This is necessary to run most binaries. Linux does not currently
  927. support floating point hardware so you need to say Y here even if
  928. your machine has an FPA or floating point co-processor podule.
  929. You may say N here if you are going to load the Acorn FPEmulator
  930. early in the bootup.
  931. config FPE_NWFPE_XP
  932. bool "Support extended precision"
  933. depends on FPE_NWFPE
  934. help
  935. Say Y to include 80-bit support in the kernel floating-point
  936. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  937. Note that gcc does not generate 80-bit operations by default,
  938. so in most cases this option only enlarges the size of the
  939. floating point emulator without any good reason.
  940. You almost surely want to say N here.
  941. config FPE_FASTFPE
  942. bool "FastFPE math emulation (EXPERIMENTAL)"
  943. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  944. ---help---
  945. Say Y here to include the FAST floating point emulator in the kernel.
  946. This is an experimental much faster emulator which now also has full
  947. precision for the mantissa. It does not support any exceptions.
  948. It is very simple, and approximately 3-6 times faster than NWFPE.
  949. It should be sufficient for most programs. It may be not suitable
  950. for scientific calculations, but you have to check this for yourself.
  951. If you do not feel you need a faster FP emulation you should better
  952. choose NWFPE.
  953. config VFP
  954. bool "VFP-format floating point maths"
  955. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  956. help
  957. Say Y to include VFP support code in the kernel. This is needed
  958. if your hardware includes a VFP unit.
  959. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  960. release notes and additional status information.
  961. Say N if your target does not have VFP hardware.
  962. config VFPv3
  963. bool
  964. depends on VFP
  965. default y if CPU_V7
  966. config NEON
  967. bool "Advanced SIMD (NEON) Extension support"
  968. depends on VFPv3 && CPU_V7
  969. help
  970. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  971. Extension.
  972. endmenu
  973. menu "Userspace binary formats"
  974. source "fs/Kconfig.binfmt"
  975. config ARTHUR
  976. tristate "RISC OS personality"
  977. depends on !AEABI
  978. help
  979. Say Y here to include the kernel code necessary if you want to run
  980. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  981. experimental; if this sounds frightening, say N and sleep in peace.
  982. You can also say M here to compile this support as a module (which
  983. will be called arthur).
  984. endmenu
  985. menu "Power management options"
  986. source "kernel/power/Kconfig"
  987. config ARCH_SUSPEND_POSSIBLE
  988. def_bool y
  989. endmenu
  990. source "net/Kconfig"
  991. menu "Device Drivers"
  992. source "drivers/base/Kconfig"
  993. source "drivers/connector/Kconfig"
  994. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  995. source "drivers/mtd/Kconfig"
  996. endif
  997. source "drivers/parport/Kconfig"
  998. source "drivers/pnp/Kconfig"
  999. source "drivers/block/Kconfig"
  1000. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  1001. source "drivers/misc/Kconfig"
  1002. source "drivers/ide/Kconfig"
  1003. source "drivers/scsi/Kconfig"
  1004. source "drivers/ata/Kconfig"
  1005. source "drivers/md/Kconfig"
  1006. source "drivers/message/fusion/Kconfig"
  1007. source "drivers/ieee1394/Kconfig"
  1008. source "drivers/message/i2o/Kconfig"
  1009. source "drivers/net/Kconfig"
  1010. source "drivers/isdn/Kconfig"
  1011. # input before char - char/joystick depends on it. As does USB.
  1012. source "drivers/input/Kconfig"
  1013. source "drivers/char/Kconfig"
  1014. source "drivers/i2c/Kconfig"
  1015. source "drivers/spi/Kconfig"
  1016. source "drivers/gpio/Kconfig"
  1017. source "drivers/w1/Kconfig"
  1018. source "drivers/power/Kconfig"
  1019. source "drivers/hwmon/Kconfig"
  1020. source "drivers/thermal/Kconfig"
  1021. source "drivers/watchdog/Kconfig"
  1022. source "drivers/ssb/Kconfig"
  1023. #source "drivers/l3/Kconfig"
  1024. source "drivers/mfd/Kconfig"
  1025. source "drivers/media/Kconfig"
  1026. source "drivers/video/Kconfig"
  1027. source "sound/Kconfig"
  1028. source "drivers/hid/Kconfig"
  1029. source "drivers/usb/Kconfig"
  1030. source "drivers/uwb/Kconfig"
  1031. source "drivers/mmc/Kconfig"
  1032. source "drivers/memstick/Kconfig"
  1033. source "drivers/accessibility/Kconfig"
  1034. source "drivers/leds/Kconfig"
  1035. source "drivers/rtc/Kconfig"
  1036. source "drivers/dma/Kconfig"
  1037. source "drivers/dca/Kconfig"
  1038. source "drivers/auxdisplay/Kconfig"
  1039. source "drivers/regulator/Kconfig"
  1040. source "drivers/uio/Kconfig"
  1041. endmenu
  1042. source "fs/Kconfig"
  1043. source "arch/arm/Kconfig.debug"
  1044. source "security/Kconfig"
  1045. source "crypto/Kconfig"
  1046. source "lib/Kconfig"