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_CLPS7500
  198. bool "Cirrus CL-PS7500FE"
  199. select CPU_ARM710
  200. select TIMER_ACORN
  201. select ISA
  202. select NO_IOPORT
  203. select ARCH_SPARSEMEM_ENABLE
  204. help
  205. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  206. config ARCH_CLPS711X
  207. bool "Cirrus Logic CLPS711x/EP721x-based"
  208. select CPU_ARM720T
  209. help
  210. Support for Cirrus Logic 711x/721x based boards.
  211. config ARCH_EBSA110
  212. bool "EBSA-110"
  213. select CPU_SA110
  214. select ISA
  215. select NO_IOPORT
  216. help
  217. This is an evaluation board for the StrongARM processor available
  218. from Digital. It has limited hardware on-board, including an
  219. Ethernet interface, two PCMCIA sockets, two serial ports and a
  220. parallel port.
  221. config ARCH_EP93XX
  222. bool "EP93xx-based"
  223. select CPU_ARM920T
  224. select ARM_AMBA
  225. select ARM_VIC
  226. select GENERIC_GPIO
  227. select HAVE_CLK
  228. select ARCH_REQUIRE_GPIOLIB
  229. help
  230. This enables support for the Cirrus EP93xx series of CPUs.
  231. config ARCH_FOOTBRIDGE
  232. bool "FootBridge"
  233. select CPU_SA110
  234. select FOOTBRIDGE
  235. help
  236. Support for systems based on the DC21285 companion chip
  237. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  238. config ARCH_NETX
  239. bool "Hilscher NetX based"
  240. select CPU_ARM926T
  241. select ARM_VIC
  242. help
  243. This enables support for systems based on the Hilscher NetX Soc
  244. config ARCH_H720X
  245. bool "Hynix HMS720x-based"
  246. select CPU_ARM720T
  247. select ISA_DMA_API
  248. help
  249. This enables support for systems based on the Hynix HMS720x
  250. config ARCH_IMX
  251. bool "IMX"
  252. select CPU_ARM920T
  253. select GENERIC_GPIO
  254. select GENERIC_TIME
  255. select GENERIC_CLOCKEVENTS
  256. help
  257. Support for Motorola's i.MX family of processors (MX1, MXL).
  258. config ARCH_IOP13XX
  259. bool "IOP13xx-based"
  260. depends on MMU
  261. select CPU_XSC3
  262. select PLAT_IOP
  263. select PCI
  264. select ARCH_SUPPORTS_MSI
  265. select VMSPLIT_1G
  266. help
  267. Support for Intel's IOP13XX (XScale) family of processors.
  268. config ARCH_IOP32X
  269. bool "IOP32x-based"
  270. depends on MMU
  271. select CPU_XSCALE
  272. select PLAT_IOP
  273. select PCI
  274. select GENERIC_GPIO
  275. select ARCH_REQUIRE_GPIOLIB
  276. help
  277. Support for Intel's 80219 and IOP32X (XScale) family of
  278. processors.
  279. config ARCH_IOP33X
  280. bool "IOP33x-based"
  281. depends on MMU
  282. select CPU_XSCALE
  283. select PLAT_IOP
  284. select PCI
  285. select GENERIC_GPIO
  286. select ARCH_REQUIRE_GPIOLIB
  287. help
  288. Support for Intel's IOP33X (XScale) family of processors.
  289. config ARCH_IXP23XX
  290. bool "IXP23XX-based"
  291. depends on MMU
  292. select CPU_XSC3
  293. select PCI
  294. help
  295. Support for Intel's IXP23xx (XScale) family of processors.
  296. config ARCH_IXP2000
  297. bool "IXP2400/2800-based"
  298. depends on MMU
  299. select CPU_XSCALE
  300. select PCI
  301. help
  302. Support for Intel's IXP2400/2800 (XScale) family of processors.
  303. config ARCH_IXP4XX
  304. bool "IXP4xx-based"
  305. depends on MMU
  306. select CPU_XSCALE
  307. select GENERIC_GPIO
  308. select GENERIC_TIME
  309. select GENERIC_CLOCKEVENTS
  310. select DMABOUNCE if PCI
  311. help
  312. Support for Intel's IXP4XX (XScale) family of processors.
  313. config ARCH_L7200
  314. bool "LinkUp-L7200"
  315. select CPU_ARM720T
  316. select FIQ
  317. help
  318. Say Y here if you intend to run this kernel on a LinkUp Systems
  319. L7200 Software Development Board which uses an ARM720T processor.
  320. Information on this board can be obtained at:
  321. <http://www.linkupsys.com/>
  322. If you have any questions or comments about the Linux kernel port
  323. to this board, send e-mail to <sjhill@cotw.com>.
  324. config ARCH_KIRKWOOD
  325. bool "Marvell Kirkwood"
  326. select CPU_FEROCEON
  327. select PCI
  328. select GENERIC_TIME
  329. select GENERIC_CLOCKEVENTS
  330. select PLAT_ORION
  331. help
  332. Support for the following Marvell Kirkwood series SoCs:
  333. 88F6180, 88F6192 and 88F6281.
  334. config ARCH_KS8695
  335. bool "Micrel/Kendin KS8695"
  336. select CPU_ARM922T
  337. select GENERIC_GPIO
  338. help
  339. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  340. System-on-Chip devices.
  341. config ARCH_NS9XXX
  342. bool "NetSilicon NS9xxx"
  343. select CPU_ARM926T
  344. select GENERIC_GPIO
  345. select GENERIC_TIME
  346. select GENERIC_CLOCKEVENTS
  347. select HAVE_CLK
  348. help
  349. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  350. System.
  351. <http://www.digi.com/products/microprocessors/index.jsp>
  352. config ARCH_LOKI
  353. bool "Marvell Loki (88RC8480)"
  354. select CPU_FEROCEON
  355. select GENERIC_TIME
  356. select GENERIC_CLOCKEVENTS
  357. select PLAT_ORION
  358. help
  359. Support for the Marvell Loki (88RC8480) SoC.
  360. config ARCH_MV78XX0
  361. bool "Marvell MV78xx0"
  362. select CPU_FEROCEON
  363. select PCI
  364. select GENERIC_TIME
  365. select GENERIC_CLOCKEVENTS
  366. select PLAT_ORION
  367. help
  368. Support for the following Marvell MV78xx0 series SoCs:
  369. MV781x0, MV782x0.
  370. config ARCH_MXC
  371. bool "Freescale MXC/iMX-based"
  372. select GENERIC_TIME
  373. select GENERIC_CLOCKEVENTS
  374. select ARCH_MTD_XIP
  375. select GENERIC_GPIO
  376. select ARCH_REQUIRE_GPIOLIB
  377. help
  378. Support for Freescale MXC/iMX-based family of processors
  379. config ARCH_ORION5X
  380. bool "Marvell Orion"
  381. depends on MMU
  382. select CPU_FEROCEON
  383. select PCI
  384. select GENERIC_GPIO
  385. select GENERIC_TIME
  386. select GENERIC_CLOCKEVENTS
  387. select PLAT_ORION
  388. help
  389. Support for the following Marvell Orion 5x series SoCs:
  390. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  391. Orion-2 (5281), Orion-1-90 (6183).
  392. config ARCH_PNX4008
  393. bool "Philips Nexperia PNX4008 Mobile"
  394. select CPU_ARM926T
  395. select HAVE_CLK
  396. help
  397. This enables support for Philips PNX4008 mobile platform.
  398. config ARCH_PXA
  399. bool "PXA2xx/PXA3xx-based"
  400. depends on MMU
  401. select ARCH_MTD_XIP
  402. select GENERIC_GPIO
  403. select HAVE_CLK
  404. select COMMON_CLKDEV
  405. select ARCH_REQUIRE_GPIOLIB
  406. select GENERIC_TIME
  407. select GENERIC_CLOCKEVENTS
  408. select TICK_ONESHOT
  409. help
  410. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  411. config ARCH_RPC
  412. bool "RiscPC"
  413. select ARCH_ACORN
  414. select FIQ
  415. select TIMER_ACORN
  416. select ARCH_MAY_HAVE_PC_FDC
  417. select HAVE_PATA_PLATFORM
  418. select ISA_DMA_API
  419. select NO_IOPORT
  420. select ARCH_SPARSEMEM_ENABLE
  421. help
  422. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  423. CD-ROM interface, serial and parallel port, and the floppy drive.
  424. config ARCH_SA1100
  425. bool "SA1100-based"
  426. select CPU_SA1100
  427. select ISA
  428. select ARCH_SPARSEMEM_ENABLE
  429. select ARCH_MTD_XIP
  430. select GENERIC_GPIO
  431. select GENERIC_TIME
  432. select GENERIC_CLOCKEVENTS
  433. select HAVE_CLK
  434. select TICK_ONESHOT
  435. select ARCH_REQUIRE_GPIOLIB
  436. help
  437. Support for StrongARM 11x0 based boards.
  438. config ARCH_S3C2410
  439. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  440. select GENERIC_GPIO
  441. select HAVE_CLK
  442. help
  443. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  444. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  445. the Samsung SMDK2410 development board (and derivatives).
  446. config ARCH_SHARK
  447. bool "Shark"
  448. select CPU_SA110
  449. select ISA
  450. select ISA_DMA
  451. select ZONE_DMA
  452. select PCI
  453. help
  454. Support for the StrongARM based Digital DNARD machine, also known
  455. as "Shark" (<http://www.shark-linux.de/shark.html>).
  456. config ARCH_LH7A40X
  457. bool "Sharp LH7A40X"
  458. select CPU_ARM922T
  459. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  460. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  461. help
  462. Say Y here for systems based on one of the Sharp LH7A40X
  463. System on a Chip processors. These CPUs include an ARM922T
  464. core with a wide array of integrated devices for
  465. hand-held and low-power applications.
  466. config ARCH_DAVINCI
  467. bool "TI DaVinci"
  468. select CPU_ARM926T
  469. select GENERIC_TIME
  470. select GENERIC_CLOCKEVENTS
  471. select GENERIC_GPIO
  472. select ARCH_REQUIRE_GPIOLIB
  473. select HAVE_CLK
  474. select ZONE_DMA
  475. help
  476. Support for TI's DaVinci platform.
  477. config ARCH_OMAP
  478. bool "TI OMAP"
  479. select GENERIC_GPIO
  480. select HAVE_CLK
  481. select ARCH_REQUIRE_GPIOLIB
  482. select GENERIC_TIME
  483. select GENERIC_CLOCKEVENTS
  484. help
  485. Support for TI's OMAP platform (OMAP1 and OMAP2).
  486. config ARCH_MSM
  487. bool "Qualcomm MSM"
  488. select CPU_V6
  489. select GENERIC_TIME
  490. select GENERIC_CLOCKEVENTS
  491. help
  492. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  493. apps processor of the MSM7K and depends on a shared memory
  494. interface to the ARM9 modem processor which runs the baseband stack
  495. and controls some vital subsystems (clock and power control, etc).
  496. endchoice
  497. source "arch/arm/mach-clps711x/Kconfig"
  498. source "arch/arm/mach-ep93xx/Kconfig"
  499. source "arch/arm/mach-footbridge/Kconfig"
  500. source "arch/arm/mach-integrator/Kconfig"
  501. source "arch/arm/mach-iop32x/Kconfig"
  502. source "arch/arm/mach-iop33x/Kconfig"
  503. source "arch/arm/mach-iop13xx/Kconfig"
  504. source "arch/arm/mach-ixp4xx/Kconfig"
  505. source "arch/arm/mach-ixp2000/Kconfig"
  506. source "arch/arm/mach-ixp23xx/Kconfig"
  507. source "arch/arm/mach-loki/Kconfig"
  508. source "arch/arm/mach-mv78xx0/Kconfig"
  509. source "arch/arm/mach-pxa/Kconfig"
  510. source "arch/arm/mach-sa1100/Kconfig"
  511. source "arch/arm/plat-omap/Kconfig"
  512. source "arch/arm/mach-omap1/Kconfig"
  513. source "arch/arm/mach-omap2/Kconfig"
  514. source "arch/arm/mach-orion5x/Kconfig"
  515. source "arch/arm/mach-kirkwood/Kconfig"
  516. source "arch/arm/plat-s3c24xx/Kconfig"
  517. source "arch/arm/plat-s3c/Kconfig"
  518. if ARCH_S3C2410
  519. source "arch/arm/mach-s3c2400/Kconfig"
  520. source "arch/arm/mach-s3c2410/Kconfig"
  521. source "arch/arm/mach-s3c2412/Kconfig"
  522. source "arch/arm/mach-s3c2440/Kconfig"
  523. source "arch/arm/mach-s3c2442/Kconfig"
  524. source "arch/arm/mach-s3c2443/Kconfig"
  525. endif
  526. source "arch/arm/mach-lh7a40x/Kconfig"
  527. source "arch/arm/mach-imx/Kconfig"
  528. source "arch/arm/mach-h720x/Kconfig"
  529. source "arch/arm/mach-versatile/Kconfig"
  530. source "arch/arm/mach-aaec2000/Kconfig"
  531. source "arch/arm/mach-realview/Kconfig"
  532. source "arch/arm/mach-at91/Kconfig"
  533. source "arch/arm/plat-mxc/Kconfig"
  534. source "arch/arm/mach-netx/Kconfig"
  535. source "arch/arm/mach-ns9xxx/Kconfig"
  536. source "arch/arm/mach-davinci/Kconfig"
  537. source "arch/arm/mach-ks8695/Kconfig"
  538. source "arch/arm/mach-msm/Kconfig"
  539. # Definitions to make life easier
  540. config ARCH_ACORN
  541. bool
  542. config PLAT_IOP
  543. bool
  544. config PLAT_ORION
  545. bool
  546. source arch/arm/mm/Kconfig
  547. config IWMMXT
  548. bool "Enable iWMMXt support"
  549. depends on CPU_XSCALE || CPU_XSC3
  550. default y if PXA27x || PXA3xx
  551. help
  552. Enable support for iWMMXt context switching at run time if
  553. running on a CPU that supports it.
  554. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  555. config XSCALE_PMU
  556. bool
  557. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  558. default y
  559. if !MMU
  560. source "arch/arm/Kconfig-nommu"
  561. endif
  562. endmenu
  563. source "arch/arm/common/Kconfig"
  564. config FORCE_MAX_ZONEORDER
  565. int
  566. depends on SA1111
  567. default "9"
  568. menu "Bus support"
  569. config ARM_AMBA
  570. bool
  571. config ISA
  572. bool
  573. help
  574. Find out whether you have ISA slots on your motherboard. ISA is the
  575. name of a bus system, i.e. the way the CPU talks to the other stuff
  576. inside your box. Other bus systems are PCI, EISA, MicroChannel
  577. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  578. newer boards don't support it. If you have ISA, say Y, otherwise N.
  579. # Select ISA DMA controller support
  580. config ISA_DMA
  581. bool
  582. select ISA_DMA_API
  583. # Select ISA DMA interface
  584. config ISA_DMA_API
  585. bool
  586. config PCI
  587. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  588. help
  589. Find out whether you have a PCI motherboard. PCI is the name of a
  590. bus system, i.e. the way the CPU talks to the other stuff inside
  591. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  592. VESA. If you have PCI, say Y, otherwise N.
  593. config PCI_SYSCALL
  594. def_bool PCI
  595. # Select the host bridge type
  596. config PCI_HOST_VIA82C505
  597. bool
  598. depends on PCI && ARCH_SHARK
  599. default y
  600. config PCI_HOST_ITE8152
  601. bool
  602. depends on PCI && MACH_ARMCORE
  603. default y
  604. select DMABOUNCE
  605. source "drivers/pci/Kconfig"
  606. source "drivers/pcmcia/Kconfig"
  607. endmenu
  608. menu "Kernel Features"
  609. source "kernel/time/Kconfig"
  610. config SMP
  611. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  612. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  613. select USE_GENERIC_SMP_HELPERS
  614. help
  615. This enables support for systems with more than one CPU. If you have
  616. a system with only one CPU, like most personal computers, say N. If
  617. you have a system with more than one CPU, say Y.
  618. If you say N here, the kernel will run on single and multiprocessor
  619. machines, but will use only one CPU of a multiprocessor machine. If
  620. you say Y here, the kernel will run on many, but not all, single
  621. processor machines. On a single processor machine, the kernel will
  622. run faster if you say N here.
  623. See also <file:Documentation/i386/IO-APIC.txt>,
  624. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  625. <http://www.linuxdoc.org/docs.html#howto>.
  626. If you don't know what to do here, say N.
  627. choice
  628. prompt "Memory split"
  629. default VMSPLIT_3G
  630. help
  631. Select the desired split between kernel and user memory.
  632. If you are not absolutely sure what you are doing, leave this
  633. option alone!
  634. config VMSPLIT_3G
  635. bool "3G/1G user/kernel split"
  636. config VMSPLIT_2G
  637. bool "2G/2G user/kernel split"
  638. config VMSPLIT_1G
  639. bool "1G/3G user/kernel split"
  640. endchoice
  641. config PAGE_OFFSET
  642. hex
  643. default 0x40000000 if VMSPLIT_1G
  644. default 0x80000000 if VMSPLIT_2G
  645. default 0xC0000000
  646. config NR_CPUS
  647. int "Maximum number of CPUs (2-32)"
  648. range 2 32
  649. depends on SMP
  650. default "4"
  651. config HOTPLUG_CPU
  652. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  653. depends on SMP && HOTPLUG && EXPERIMENTAL
  654. help
  655. Say Y here to experiment with turning CPUs off and on. CPUs
  656. can be controlled through /sys/devices/system/cpu.
  657. config LOCAL_TIMERS
  658. bool "Use local timer interrupts"
  659. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  660. default y
  661. help
  662. Enable support for local timers on SMP platforms, rather then the
  663. legacy IPI broadcast method. Local timers allows the system
  664. accounting to be spread across the timer interval, preventing a
  665. "thundering herd" at every timer tick.
  666. config PREEMPT
  667. bool "Preemptible Kernel (EXPERIMENTAL)"
  668. depends on EXPERIMENTAL
  669. help
  670. This option reduces the latency of the kernel when reacting to
  671. real-time or interactive events by allowing a low priority process to
  672. be preempted even if it is in kernel mode executing a system call.
  673. This allows applications to run more reliably even when the system is
  674. under load.
  675. Say Y here if you are building a kernel for a desktop, embedded
  676. or real-time system. Say N if you are unsure.
  677. config HZ
  678. int
  679. default 128 if ARCH_L7200
  680. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  681. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  682. default AT91_TIMER_HZ if ARCH_AT91
  683. default 100
  684. config AEABI
  685. bool "Use the ARM EABI to compile the kernel"
  686. help
  687. This option allows for the kernel to be compiled using the latest
  688. ARM ABI (aka EABI). This is only useful if you are using a user
  689. space environment that is also compiled with EABI.
  690. Since there are major incompatibilities between the legacy ABI and
  691. EABI, especially with regard to structure member alignment, this
  692. option also changes the kernel syscall calling convention to
  693. disambiguate both ABIs and allow for backward compatibility support
  694. (selected with CONFIG_OABI_COMPAT).
  695. To use this you need GCC version 4.0.0 or later.
  696. config OABI_COMPAT
  697. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  698. depends on AEABI && EXPERIMENTAL
  699. default y
  700. help
  701. This option preserves the old syscall interface along with the
  702. new (ARM EABI) one. It also provides a compatibility layer to
  703. intercept syscalls that have structure arguments which layout
  704. in memory differs between the legacy ABI and the new ARM EABI
  705. (only for non "thumb" binaries). This option adds a tiny
  706. overhead to all syscalls and produces a slightly larger kernel.
  707. If you know you'll be using only pure EABI user space then you
  708. can say N here. If this option is not selected and you attempt
  709. to execute a legacy ABI binary then the result will be
  710. UNPREDICTABLE (in fact it can be predicted that it won't work
  711. at all). If in doubt say Y.
  712. config ARCH_FLATMEM_HAS_HOLES
  713. bool
  714. default y
  715. depends on FLATMEM
  716. # Discontigmem is deprecated
  717. config ARCH_DISCONTIGMEM_ENABLE
  718. bool
  719. config ARCH_SPARSEMEM_ENABLE
  720. bool
  721. config ARCH_SPARSEMEM_DEFAULT
  722. def_bool ARCH_SPARSEMEM_ENABLE
  723. config ARCH_SELECT_MEMORY_MODEL
  724. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  725. config NODES_SHIFT
  726. int
  727. default "4" if ARCH_LH7A40X
  728. default "2"
  729. depends on NEED_MULTIPLE_NODES
  730. source "mm/Kconfig"
  731. config LEDS
  732. bool "Timer and CPU usage LEDs"
  733. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  734. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  735. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  736. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  737. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  738. ARCH_AT91 || ARCH_DAVINCI || \
  739. ARCH_KS8695 || MACH_RD88F5182
  740. help
  741. If you say Y here, the LEDs on your machine will be used
  742. to provide useful information about your current system status.
  743. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  744. be able to select which LEDs are active using the options below. If
  745. you are compiling a kernel for the EBSA-110 or the LART however, the
  746. red LED will simply flash regularly to indicate that the system is
  747. still functional. It is safe to say Y here if you have a CATS
  748. system, but the driver will do nothing.
  749. config LEDS_TIMER
  750. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  751. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  752. || MACH_OMAP_PERSEUS2
  753. depends on LEDS
  754. depends on !GENERIC_CLOCKEVENTS
  755. default y if ARCH_EBSA110
  756. help
  757. If you say Y here, one of the system LEDs (the green one on the
  758. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  759. will flash regularly to indicate that the system is still
  760. operational. This is mainly useful to kernel hackers who are
  761. debugging unstable kernels.
  762. The LART uses the same LED for both Timer LED and CPU usage LED
  763. functions. You may choose to use both, but the Timer LED function
  764. will overrule the CPU usage LED.
  765. config LEDS_CPU
  766. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  767. !ARCH_OMAP) \
  768. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  769. || MACH_OMAP_PERSEUS2
  770. depends on LEDS
  771. help
  772. If you say Y here, the red LED will be used to give a good real
  773. time indication of CPU usage, by lighting whenever the idle task
  774. is not currently executing.
  775. The LART uses the same LED for both Timer LED and CPU usage LED
  776. functions. You may choose to use both, but the Timer LED function
  777. will overrule the CPU usage LED.
  778. config ALIGNMENT_TRAP
  779. bool
  780. depends on CPU_CP15_MMU
  781. default y if !ARCH_EBSA110
  782. help
  783. ARM processors cannot fetch/store information which is not
  784. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  785. address divisible by 4. On 32-bit ARM processors, these non-aligned
  786. fetch/store instructions will be emulated in software if you say
  787. here, which has a severe performance impact. This is necessary for
  788. correct operation of some network protocols. With an IP-only
  789. configuration it is safe to say N, otherwise say Y.
  790. endmenu
  791. menu "Boot options"
  792. # Compressed boot loader in ROM. Yes, we really want to ask about
  793. # TEXT and BSS so we preserve their values in the config files.
  794. config ZBOOT_ROM_TEXT
  795. hex "Compressed ROM boot loader base address"
  796. default "0"
  797. help
  798. The physical address at which the ROM-able zImage is to be
  799. placed in the target. Platforms which normally make use of
  800. ROM-able zImage formats normally set this to a suitable
  801. value in their defconfig file.
  802. If ZBOOT_ROM is not enabled, this has no effect.
  803. config ZBOOT_ROM_BSS
  804. hex "Compressed ROM boot loader BSS address"
  805. default "0"
  806. help
  807. The base address of an area of read/write memory in the target
  808. for the ROM-able zImage which must be available while the
  809. decompressor is running. It must be large enough to hold the
  810. entire decompressed kernel plus an additional 128 KiB.
  811. Platforms which normally make use of ROM-able zImage formats
  812. normally set this to a suitable value in their defconfig file.
  813. If ZBOOT_ROM is not enabled, this has no effect.
  814. config ZBOOT_ROM
  815. bool "Compressed boot loader in ROM/flash"
  816. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  817. help
  818. Say Y here if you intend to execute your compressed kernel image
  819. (zImage) directly from ROM or flash. If unsure, say N.
  820. config CMDLINE
  821. string "Default kernel command string"
  822. default ""
  823. help
  824. On some architectures (EBSA110 and CATS), there is currently no way
  825. for the boot loader to pass arguments to the kernel. For these
  826. architectures, you should supply some command-line options at build
  827. time by entering them here. As a minimum, you should specify the
  828. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  829. config XIP_KERNEL
  830. bool "Kernel Execute-In-Place from ROM"
  831. depends on !ZBOOT_ROM
  832. help
  833. Execute-In-Place allows the kernel to run from non-volatile storage
  834. directly addressable by the CPU, such as NOR flash. This saves RAM
  835. space since the text section of the kernel is not loaded from flash
  836. to RAM. Read-write sections, such as the data section and stack,
  837. are still copied to RAM. The XIP kernel is not compressed since
  838. it has to run directly from flash, so it will take more space to
  839. store it. The flash address used to link the kernel object files,
  840. and for storing it, is configuration dependent. Therefore, if you
  841. say Y here, you must know the proper physical address where to
  842. store the kernel image depending on your own flash memory usage.
  843. Also note that the make target becomes "make xipImage" rather than
  844. "make zImage" or "make Image". The final kernel binary to put in
  845. ROM memory will be arch/arm/boot/xipImage.
  846. If unsure, say N.
  847. config XIP_PHYS_ADDR
  848. hex "XIP Kernel Physical Location"
  849. depends on XIP_KERNEL
  850. default "0x00080000"
  851. help
  852. This is the physical address in your flash memory the kernel will
  853. be linked for and stored to. This address is dependent on your
  854. own flash usage.
  855. config KEXEC
  856. bool "Kexec system call (EXPERIMENTAL)"
  857. depends on EXPERIMENTAL
  858. help
  859. kexec is a system call that implements the ability to shutdown your
  860. current kernel, and to start another kernel. It is like a reboot
  861. but it is independent of the system firmware. And like a reboot
  862. you can start any kernel with it, not just Linux.
  863. It is an ongoing process to be certain the hardware in a machine
  864. is properly shutdown, so do not be surprised if this code does not
  865. initially work for you. It may help to enable device hotplugging
  866. support.
  867. config ATAGS_PROC
  868. bool "Export atags in procfs"
  869. depends on KEXEC
  870. default y
  871. help
  872. Should the atags used to boot the kernel be exported in an "atags"
  873. file in procfs. Useful with kexec.
  874. endmenu
  875. menu "CPU Power Management"
  876. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
  877. source "drivers/cpufreq/Kconfig"
  878. config CPU_FREQ_SA1100
  879. bool
  880. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  881. default y
  882. config CPU_FREQ_SA1110
  883. bool
  884. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  885. default y
  886. config CPU_FREQ_INTEGRATOR
  887. tristate "CPUfreq driver for ARM Integrator CPUs"
  888. depends on ARCH_INTEGRATOR && CPU_FREQ
  889. default y
  890. help
  891. This enables the CPUfreq driver for ARM Integrator CPUs.
  892. For details, take a look at <file:Documentation/cpu-freq>.
  893. If in doubt, say Y.
  894. config CPU_FREQ_IMX
  895. tristate "CPUfreq driver for i.MX CPUs"
  896. depends on ARCH_IMX && CPU_FREQ
  897. default n
  898. help
  899. This enables the CPUfreq driver for i.MX CPUs.
  900. If in doubt, say N.
  901. config CPU_FREQ_PXA
  902. bool
  903. depends on CPU_FREQ && ARCH_PXA && PXA25x
  904. default y
  905. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  906. endif
  907. source "drivers/cpuidle/Kconfig"
  908. endmenu
  909. menu "Floating point emulation"
  910. comment "At least one emulation must be selected"
  911. config FPE_NWFPE
  912. bool "NWFPE math emulation"
  913. depends on !AEABI || OABI_COMPAT
  914. ---help---
  915. Say Y to include the NWFPE floating point emulator in the kernel.
  916. This is necessary to run most binaries. Linux does not currently
  917. support floating point hardware so you need to say Y here even if
  918. your machine has an FPA or floating point co-processor podule.
  919. You may say N here if you are going to load the Acorn FPEmulator
  920. early in the bootup.
  921. config FPE_NWFPE_XP
  922. bool "Support extended precision"
  923. depends on FPE_NWFPE
  924. help
  925. Say Y to include 80-bit support in the kernel floating-point
  926. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  927. Note that gcc does not generate 80-bit operations by default,
  928. so in most cases this option only enlarges the size of the
  929. floating point emulator without any good reason.
  930. You almost surely want to say N here.
  931. config FPE_FASTFPE
  932. bool "FastFPE math emulation (EXPERIMENTAL)"
  933. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  934. ---help---
  935. Say Y here to include the FAST floating point emulator in the kernel.
  936. This is an experimental much faster emulator which now also has full
  937. precision for the mantissa. It does not support any exceptions.
  938. It is very simple, and approximately 3-6 times faster than NWFPE.
  939. It should be sufficient for most programs. It may be not suitable
  940. for scientific calculations, but you have to check this for yourself.
  941. If you do not feel you need a faster FP emulation you should better
  942. choose NWFPE.
  943. config VFP
  944. bool "VFP-format floating point maths"
  945. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  946. help
  947. Say Y to include VFP support code in the kernel. This is needed
  948. if your hardware includes a VFP unit.
  949. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  950. release notes and additional status information.
  951. Say N if your target does not have VFP hardware.
  952. config VFPv3
  953. bool
  954. depends on VFP
  955. default y if CPU_V7
  956. config NEON
  957. bool "Advanced SIMD (NEON) Extension support"
  958. depends on VFPv3 && CPU_V7
  959. help
  960. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  961. Extension.
  962. endmenu
  963. menu "Userspace binary formats"
  964. source "fs/Kconfig.binfmt"
  965. config ARTHUR
  966. tristate "RISC OS personality"
  967. depends on !AEABI
  968. help
  969. Say Y here to include the kernel code necessary if you want to run
  970. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  971. experimental; if this sounds frightening, say N and sleep in peace.
  972. You can also say M here to compile this support as a module (which
  973. will be called arthur).
  974. endmenu
  975. menu "Power management options"
  976. source "kernel/power/Kconfig"
  977. config ARCH_SUSPEND_POSSIBLE
  978. def_bool y
  979. endmenu
  980. source "net/Kconfig"
  981. menu "Device Drivers"
  982. source "drivers/base/Kconfig"
  983. source "drivers/connector/Kconfig"
  984. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  985. source "drivers/mtd/Kconfig"
  986. endif
  987. source "drivers/parport/Kconfig"
  988. source "drivers/pnp/Kconfig"
  989. source "drivers/block/Kconfig"
  990. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  991. source "drivers/misc/Kconfig"
  992. source "drivers/ide/Kconfig"
  993. source "drivers/scsi/Kconfig"
  994. source "drivers/ata/Kconfig"
  995. source "drivers/md/Kconfig"
  996. source "drivers/message/fusion/Kconfig"
  997. source "drivers/ieee1394/Kconfig"
  998. source "drivers/message/i2o/Kconfig"
  999. source "drivers/net/Kconfig"
  1000. source "drivers/isdn/Kconfig"
  1001. # input before char - char/joystick depends on it. As does USB.
  1002. source "drivers/input/Kconfig"
  1003. source "drivers/char/Kconfig"
  1004. source "drivers/i2c/Kconfig"
  1005. source "drivers/spi/Kconfig"
  1006. source "drivers/gpio/Kconfig"
  1007. source "drivers/w1/Kconfig"
  1008. source "drivers/power/Kconfig"
  1009. source "drivers/hwmon/Kconfig"
  1010. source "drivers/thermal/Kconfig"
  1011. source "drivers/watchdog/Kconfig"
  1012. source "drivers/ssb/Kconfig"
  1013. #source "drivers/l3/Kconfig"
  1014. source "drivers/mfd/Kconfig"
  1015. source "drivers/media/Kconfig"
  1016. source "drivers/video/Kconfig"
  1017. source "sound/Kconfig"
  1018. source "drivers/hid/Kconfig"
  1019. source "drivers/usb/Kconfig"
  1020. source "drivers/uwb/Kconfig"
  1021. source "drivers/mmc/Kconfig"
  1022. source "drivers/memstick/Kconfig"
  1023. source "drivers/accessibility/Kconfig"
  1024. source "drivers/leds/Kconfig"
  1025. source "drivers/rtc/Kconfig"
  1026. source "drivers/dma/Kconfig"
  1027. source "drivers/dca/Kconfig"
  1028. source "drivers/auxdisplay/Kconfig"
  1029. source "drivers/regulator/Kconfig"
  1030. source "drivers/uio/Kconfig"
  1031. endmenu
  1032. source "fs/Kconfig"
  1033. source "arch/arm/Kconfig.debug"
  1034. source "security/Kconfig"
  1035. source "crypto/Kconfig"
  1036. source "lib/Kconfig"