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. select ARCH_REQUIRE_GPIOLIB
  331. help
  332. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  333. System-on-Chip devices.
  334. config ARCH_NS9XXX
  335. bool "NetSilicon NS9xxx"
  336. select CPU_ARM926T
  337. select GENERIC_GPIO
  338. select GENERIC_TIME
  339. select GENERIC_CLOCKEVENTS
  340. select HAVE_CLK
  341. help
  342. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  343. System.
  344. <http://www.digi.com/products/microprocessors/index.jsp>
  345. config ARCH_LOKI
  346. bool "Marvell Loki (88RC8480)"
  347. select CPU_FEROCEON
  348. select GENERIC_TIME
  349. select GENERIC_CLOCKEVENTS
  350. select PLAT_ORION
  351. help
  352. Support for the Marvell Loki (88RC8480) SoC.
  353. config ARCH_MV78XX0
  354. bool "Marvell MV78xx0"
  355. select CPU_FEROCEON
  356. select PCI
  357. select GENERIC_TIME
  358. select GENERIC_CLOCKEVENTS
  359. select PLAT_ORION
  360. help
  361. Support for the following Marvell MV78xx0 series SoCs:
  362. MV781x0, MV782x0.
  363. config ARCH_MXC
  364. bool "Freescale MXC/iMX-based"
  365. select GENERIC_TIME
  366. select GENERIC_CLOCKEVENTS
  367. select ARCH_MTD_XIP
  368. select GENERIC_GPIO
  369. select ARCH_REQUIRE_GPIOLIB
  370. help
  371. Support for Freescale MXC/iMX-based family of processors
  372. config ARCH_ORION5X
  373. bool "Marvell Orion"
  374. depends on MMU
  375. select CPU_FEROCEON
  376. select PCI
  377. select GENERIC_GPIO
  378. select GENERIC_TIME
  379. select GENERIC_CLOCKEVENTS
  380. select PLAT_ORION
  381. help
  382. Support for the following Marvell Orion 5x series SoCs:
  383. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  384. Orion-2 (5281), Orion-1-90 (6183).
  385. config ARCH_PNX4008
  386. bool "Philips Nexperia PNX4008 Mobile"
  387. select CPU_ARM926T
  388. select HAVE_CLK
  389. help
  390. This enables support for Philips PNX4008 mobile platform.
  391. config ARCH_PXA
  392. bool "PXA2xx/PXA3xx-based"
  393. depends on MMU
  394. select ARCH_MTD_XIP
  395. select GENERIC_GPIO
  396. select HAVE_CLK
  397. select COMMON_CLKDEV
  398. select ARCH_REQUIRE_GPIOLIB
  399. select GENERIC_TIME
  400. select GENERIC_CLOCKEVENTS
  401. select TICK_ONESHOT
  402. help
  403. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  404. config ARCH_RPC
  405. bool "RiscPC"
  406. select ARCH_ACORN
  407. select FIQ
  408. select TIMER_ACORN
  409. select ARCH_MAY_HAVE_PC_FDC
  410. select HAVE_PATA_PLATFORM
  411. select ISA_DMA_API
  412. select NO_IOPORT
  413. select ARCH_SPARSEMEM_ENABLE
  414. help
  415. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  416. CD-ROM interface, serial and parallel port, and the floppy drive.
  417. config ARCH_SA1100
  418. bool "SA1100-based"
  419. select CPU_SA1100
  420. select ISA
  421. select ARCH_SPARSEMEM_ENABLE
  422. select ARCH_MTD_XIP
  423. select GENERIC_GPIO
  424. select GENERIC_TIME
  425. select GENERIC_CLOCKEVENTS
  426. select HAVE_CLK
  427. select TICK_ONESHOT
  428. select ARCH_REQUIRE_GPIOLIB
  429. help
  430. Support for StrongARM 11x0 based boards.
  431. config ARCH_S3C2410
  432. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  433. select GENERIC_GPIO
  434. select HAVE_CLK
  435. help
  436. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  437. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  438. the Samsung SMDK2410 development board (and derivatives).
  439. config ARCH_S3C64XX
  440. bool "Samsung S3C64XX"
  441. select GENERIC_GPIO
  442. select HAVE_CLK
  443. help
  444. Samsung S3C64XX series based systems
  445. config ARCH_SHARK
  446. bool "Shark"
  447. select CPU_SA110
  448. select ISA
  449. select ISA_DMA
  450. select ZONE_DMA
  451. select PCI
  452. help
  453. Support for the StrongARM based Digital DNARD machine, also known
  454. as "Shark" (<http://www.shark-linux.de/shark.html>).
  455. config ARCH_LH7A40X
  456. bool "Sharp LH7A40X"
  457. select CPU_ARM922T
  458. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  459. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  460. help
  461. Say Y here for systems based on one of the Sharp LH7A40X
  462. System on a Chip processors. These CPUs include an ARM922T
  463. core with a wide array of integrated devices for
  464. hand-held and low-power applications.
  465. config ARCH_DAVINCI
  466. bool "TI DaVinci"
  467. select CPU_ARM926T
  468. select GENERIC_TIME
  469. select GENERIC_CLOCKEVENTS
  470. select GENERIC_GPIO
  471. select ARCH_REQUIRE_GPIOLIB
  472. select HAVE_CLK
  473. select ZONE_DMA
  474. help
  475. Support for TI's DaVinci platform.
  476. config ARCH_OMAP
  477. bool "TI OMAP"
  478. select GENERIC_GPIO
  479. select HAVE_CLK
  480. select ARCH_REQUIRE_GPIOLIB
  481. select GENERIC_TIME
  482. select GENERIC_CLOCKEVENTS
  483. help
  484. Support for TI's OMAP platform (OMAP1 and OMAP2).
  485. config ARCH_MSM
  486. bool "Qualcomm MSM"
  487. select CPU_V6
  488. select GENERIC_TIME
  489. select GENERIC_CLOCKEVENTS
  490. help
  491. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  492. apps processor of the MSM7K and depends on a shared memory
  493. interface to the ARM9 modem processor which runs the baseband stack
  494. and controls some vital subsystems (clock and power control, etc).
  495. config ARCH_W90X900
  496. bool "Nuvoton W90X900 CPU"
  497. select CPU_ARM926T
  498. help
  499. Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
  500. can login www.mcuos.com or www.nuvoton.com to know more.
  501. endchoice
  502. source "arch/arm/mach-clps711x/Kconfig"
  503. source "arch/arm/mach-ep93xx/Kconfig"
  504. source "arch/arm/mach-footbridge/Kconfig"
  505. source "arch/arm/mach-integrator/Kconfig"
  506. source "arch/arm/mach-iop32x/Kconfig"
  507. source "arch/arm/mach-iop33x/Kconfig"
  508. source "arch/arm/mach-iop13xx/Kconfig"
  509. source "arch/arm/mach-ixp4xx/Kconfig"
  510. source "arch/arm/mach-ixp2000/Kconfig"
  511. source "arch/arm/mach-ixp23xx/Kconfig"
  512. source "arch/arm/mach-loki/Kconfig"
  513. source "arch/arm/mach-mv78xx0/Kconfig"
  514. source "arch/arm/mach-pxa/Kconfig"
  515. source "arch/arm/mach-sa1100/Kconfig"
  516. source "arch/arm/plat-omap/Kconfig"
  517. source "arch/arm/mach-omap1/Kconfig"
  518. source "arch/arm/mach-omap2/Kconfig"
  519. source "arch/arm/mach-orion5x/Kconfig"
  520. source "arch/arm/mach-kirkwood/Kconfig"
  521. source "arch/arm/plat-s3c24xx/Kconfig"
  522. source "arch/arm/plat-s3c64xx/Kconfig"
  523. source "arch/arm/plat-s3c/Kconfig"
  524. if ARCH_S3C2410
  525. source "arch/arm/mach-s3c2400/Kconfig"
  526. source "arch/arm/mach-s3c2410/Kconfig"
  527. source "arch/arm/mach-s3c2412/Kconfig"
  528. source "arch/arm/mach-s3c2440/Kconfig"
  529. source "arch/arm/mach-s3c2442/Kconfig"
  530. source "arch/arm/mach-s3c2443/Kconfig"
  531. endif
  532. if ARCH_S3C64XX
  533. source "arch/arm/mach-s3c6400/Kconfig"
  534. source "arch/arm/mach-s3c6410/Kconfig"
  535. endif
  536. source "arch/arm/mach-lh7a40x/Kconfig"
  537. source "arch/arm/mach-imx/Kconfig"
  538. source "arch/arm/mach-h720x/Kconfig"
  539. source "arch/arm/mach-versatile/Kconfig"
  540. source "arch/arm/mach-aaec2000/Kconfig"
  541. source "arch/arm/mach-realview/Kconfig"
  542. source "arch/arm/mach-at91/Kconfig"
  543. source "arch/arm/plat-mxc/Kconfig"
  544. source "arch/arm/mach-netx/Kconfig"
  545. source "arch/arm/mach-ns9xxx/Kconfig"
  546. source "arch/arm/mach-davinci/Kconfig"
  547. source "arch/arm/mach-ks8695/Kconfig"
  548. source "arch/arm/mach-msm/Kconfig"
  549. source "arch/arm/mach-w90x900/Kconfig"
  550. # Definitions to make life easier
  551. config ARCH_ACORN
  552. bool
  553. config PLAT_IOP
  554. bool
  555. config PLAT_ORION
  556. bool
  557. source arch/arm/mm/Kconfig
  558. config IWMMXT
  559. bool "Enable iWMMXt support"
  560. depends on CPU_XSCALE || CPU_XSC3
  561. default y if PXA27x || PXA3xx
  562. help
  563. Enable support for iWMMXt context switching at run time if
  564. running on a CPU that supports it.
  565. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  566. config XSCALE_PMU
  567. bool
  568. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  569. default y
  570. if !MMU
  571. source "arch/arm/Kconfig-nommu"
  572. endif
  573. endmenu
  574. source "arch/arm/common/Kconfig"
  575. config FORCE_MAX_ZONEORDER
  576. int
  577. depends on SA1111
  578. default "9"
  579. menu "Bus support"
  580. config ARM_AMBA
  581. bool
  582. config ISA
  583. bool
  584. help
  585. Find out whether you have ISA slots on your motherboard. ISA is the
  586. name of a bus system, i.e. the way the CPU talks to the other stuff
  587. inside your box. Other bus systems are PCI, EISA, MicroChannel
  588. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  589. newer boards don't support it. If you have ISA, say Y, otherwise N.
  590. # Select ISA DMA controller support
  591. config ISA_DMA
  592. bool
  593. select ISA_DMA_API
  594. # Select ISA DMA interface
  595. config ISA_DMA_API
  596. bool
  597. config PCI
  598. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  599. help
  600. Find out whether you have a PCI motherboard. PCI is the name of a
  601. bus system, i.e. the way the CPU talks to the other stuff inside
  602. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  603. VESA. If you have PCI, say Y, otherwise N.
  604. config PCI_SYSCALL
  605. def_bool PCI
  606. # Select the host bridge type
  607. config PCI_HOST_VIA82C505
  608. bool
  609. depends on PCI && ARCH_SHARK
  610. default y
  611. config PCI_HOST_ITE8152
  612. bool
  613. depends on PCI && MACH_ARMCORE
  614. default y
  615. select DMABOUNCE
  616. source "drivers/pci/Kconfig"
  617. source "drivers/pcmcia/Kconfig"
  618. endmenu
  619. menu "Kernel Features"
  620. source "kernel/time/Kconfig"
  621. config SMP
  622. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  623. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  624. select USE_GENERIC_SMP_HELPERS
  625. help
  626. This enables support for systems with more than one CPU. If you have
  627. a system with only one CPU, like most personal computers, say N. If
  628. you have a system with more than one CPU, say Y.
  629. If you say N here, the kernel will run on single and multiprocessor
  630. machines, but will use only one CPU of a multiprocessor machine. If
  631. you say Y here, the kernel will run on many, but not all, single
  632. processor machines. On a single processor machine, the kernel will
  633. run faster if you say N here.
  634. See also <file:Documentation/i386/IO-APIC.txt>,
  635. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  636. <http://www.linuxdoc.org/docs.html#howto>.
  637. If you don't know what to do here, say N.
  638. choice
  639. prompt "Memory split"
  640. default VMSPLIT_3G
  641. help
  642. Select the desired split between kernel and user memory.
  643. If you are not absolutely sure what you are doing, leave this
  644. option alone!
  645. config VMSPLIT_3G
  646. bool "3G/1G user/kernel split"
  647. config VMSPLIT_2G
  648. bool "2G/2G user/kernel split"
  649. config VMSPLIT_1G
  650. bool "1G/3G user/kernel split"
  651. endchoice
  652. config PAGE_OFFSET
  653. hex
  654. default 0x40000000 if VMSPLIT_1G
  655. default 0x80000000 if VMSPLIT_2G
  656. default 0xC0000000
  657. config NR_CPUS
  658. int "Maximum number of CPUs (2-32)"
  659. range 2 32
  660. depends on SMP
  661. default "4"
  662. config HOTPLUG_CPU
  663. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  664. depends on SMP && HOTPLUG && EXPERIMENTAL
  665. help
  666. Say Y here to experiment with turning CPUs off and on. CPUs
  667. can be controlled through /sys/devices/system/cpu.
  668. config LOCAL_TIMERS
  669. bool "Use local timer interrupts"
  670. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
  671. default y
  672. help
  673. Enable support for local timers on SMP platforms, rather then the
  674. legacy IPI broadcast method. Local timers allows the system
  675. accounting to be spread across the timer interval, preventing a
  676. "thundering herd" at every timer tick.
  677. config PREEMPT
  678. bool "Preemptible Kernel (EXPERIMENTAL)"
  679. depends on EXPERIMENTAL
  680. help
  681. This option reduces the latency of the kernel when reacting to
  682. real-time or interactive events by allowing a low priority process to
  683. be preempted even if it is in kernel mode executing a system call.
  684. This allows applications to run more reliably even when the system is
  685. under load.
  686. Say Y here if you are building a kernel for a desktop, embedded
  687. or real-time system. Say N if you are unsure.
  688. config HZ
  689. int
  690. default 128 if ARCH_L7200
  691. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  692. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  693. default AT91_TIMER_HZ if ARCH_AT91
  694. default 100
  695. config AEABI
  696. bool "Use the ARM EABI to compile the kernel"
  697. help
  698. This option allows for the kernel to be compiled using the latest
  699. ARM ABI (aka EABI). This is only useful if you are using a user
  700. space environment that is also compiled with EABI.
  701. Since there are major incompatibilities between the legacy ABI and
  702. EABI, especially with regard to structure member alignment, this
  703. option also changes the kernel syscall calling convention to
  704. disambiguate both ABIs and allow for backward compatibility support
  705. (selected with CONFIG_OABI_COMPAT).
  706. To use this you need GCC version 4.0.0 or later.
  707. config OABI_COMPAT
  708. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  709. depends on AEABI && EXPERIMENTAL
  710. default y
  711. help
  712. This option preserves the old syscall interface along with the
  713. new (ARM EABI) one. It also provides a compatibility layer to
  714. intercept syscalls that have structure arguments which layout
  715. in memory differs between the legacy ABI and the new ARM EABI
  716. (only for non "thumb" binaries). This option adds a tiny
  717. overhead to all syscalls and produces a slightly larger kernel.
  718. If you know you'll be using only pure EABI user space then you
  719. can say N here. If this option is not selected and you attempt
  720. to execute a legacy ABI binary then the result will be
  721. UNPREDICTABLE (in fact it can be predicted that it won't work
  722. at all). If in doubt say Y.
  723. config ARCH_FLATMEM_HAS_HOLES
  724. bool
  725. default y
  726. depends on FLATMEM
  727. # Discontigmem is deprecated
  728. config ARCH_DISCONTIGMEM_ENABLE
  729. bool
  730. config ARCH_SPARSEMEM_ENABLE
  731. bool
  732. config ARCH_SPARSEMEM_DEFAULT
  733. def_bool ARCH_SPARSEMEM_ENABLE
  734. config ARCH_SELECT_MEMORY_MODEL
  735. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  736. config NODES_SHIFT
  737. int
  738. default "4" if ARCH_LH7A40X
  739. default "2"
  740. depends on NEED_MULTIPLE_NODES
  741. source "mm/Kconfig"
  742. config LEDS
  743. bool "Timer and CPU usage LEDs"
  744. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  745. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  746. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  747. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  748. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  749. ARCH_AT91 || ARCH_DAVINCI || \
  750. ARCH_KS8695 || MACH_RD88F5182
  751. help
  752. If you say Y here, the LEDs on your machine will be used
  753. to provide useful information about your current system status.
  754. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  755. be able to select which LEDs are active using the options below. If
  756. you are compiling a kernel for the EBSA-110 or the LART however, the
  757. red LED will simply flash regularly to indicate that the system is
  758. still functional. It is safe to say Y here if you have a CATS
  759. system, but the driver will do nothing.
  760. config LEDS_TIMER
  761. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  762. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  763. || MACH_OMAP_PERSEUS2
  764. depends on LEDS
  765. depends on !GENERIC_CLOCKEVENTS
  766. default y if ARCH_EBSA110
  767. help
  768. If you say Y here, one of the system LEDs (the green one on the
  769. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  770. will flash regularly to indicate that the system is still
  771. operational. This is mainly useful to kernel hackers who are
  772. debugging unstable kernels.
  773. The LART uses the same LED for both Timer LED and CPU usage LED
  774. functions. You may choose to use both, but the Timer LED function
  775. will overrule the CPU usage LED.
  776. config LEDS_CPU
  777. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  778. !ARCH_OMAP) \
  779. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  780. || MACH_OMAP_PERSEUS2
  781. depends on LEDS
  782. help
  783. If you say Y here, the red LED will be used to give a good real
  784. time indication of CPU usage, by lighting whenever the idle task
  785. is not currently executing.
  786. The LART uses the same LED for both Timer LED and CPU usage LED
  787. functions. You may choose to use both, but the Timer LED function
  788. will overrule the CPU usage LED.
  789. config ALIGNMENT_TRAP
  790. bool
  791. depends on CPU_CP15_MMU
  792. default y if !ARCH_EBSA110
  793. help
  794. ARM processors cannot fetch/store information which is not
  795. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  796. address divisible by 4. On 32-bit ARM processors, these non-aligned
  797. fetch/store instructions will be emulated in software if you say
  798. here, which has a severe performance impact. This is necessary for
  799. correct operation of some network protocols. With an IP-only
  800. configuration it is safe to say N, otherwise say Y.
  801. endmenu
  802. menu "Boot options"
  803. # Compressed boot loader in ROM. Yes, we really want to ask about
  804. # TEXT and BSS so we preserve their values in the config files.
  805. config ZBOOT_ROM_TEXT
  806. hex "Compressed ROM boot loader base address"
  807. default "0"
  808. help
  809. The physical address at which the ROM-able zImage is to be
  810. placed in the target. Platforms which normally make use of
  811. ROM-able zImage formats normally set this to a suitable
  812. value in their defconfig file.
  813. If ZBOOT_ROM is not enabled, this has no effect.
  814. config ZBOOT_ROM_BSS
  815. hex "Compressed ROM boot loader BSS address"
  816. default "0"
  817. help
  818. The base address of an area of read/write memory in the target
  819. for the ROM-able zImage which must be available while the
  820. decompressor is running. It must be large enough to hold the
  821. entire decompressed kernel plus an additional 128 KiB.
  822. Platforms which normally make use of ROM-able zImage formats
  823. normally set this to a suitable value in their defconfig file.
  824. If ZBOOT_ROM is not enabled, this has no effect.
  825. config ZBOOT_ROM
  826. bool "Compressed boot loader in ROM/flash"
  827. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  828. help
  829. Say Y here if you intend to execute your compressed kernel image
  830. (zImage) directly from ROM or flash. If unsure, say N.
  831. config CMDLINE
  832. string "Default kernel command string"
  833. default ""
  834. help
  835. On some architectures (EBSA110 and CATS), there is currently no way
  836. for the boot loader to pass arguments to the kernel. For these
  837. architectures, you should supply some command-line options at build
  838. time by entering them here. As a minimum, you should specify the
  839. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  840. config XIP_KERNEL
  841. bool "Kernel Execute-In-Place from ROM"
  842. depends on !ZBOOT_ROM
  843. help
  844. Execute-In-Place allows the kernel to run from non-volatile storage
  845. directly addressable by the CPU, such as NOR flash. This saves RAM
  846. space since the text section of the kernel is not loaded from flash
  847. to RAM. Read-write sections, such as the data section and stack,
  848. are still copied to RAM. The XIP kernel is not compressed since
  849. it has to run directly from flash, so it will take more space to
  850. store it. The flash address used to link the kernel object files,
  851. and for storing it, is configuration dependent. Therefore, if you
  852. say Y here, you must know the proper physical address where to
  853. store the kernel image depending on your own flash memory usage.
  854. Also note that the make target becomes "make xipImage" rather than
  855. "make zImage" or "make Image". The final kernel binary to put in
  856. ROM memory will be arch/arm/boot/xipImage.
  857. If unsure, say N.
  858. config XIP_PHYS_ADDR
  859. hex "XIP Kernel Physical Location"
  860. depends on XIP_KERNEL
  861. default "0x00080000"
  862. help
  863. This is the physical address in your flash memory the kernel will
  864. be linked for and stored to. This address is dependent on your
  865. own flash usage.
  866. config KEXEC
  867. bool "Kexec system call (EXPERIMENTAL)"
  868. depends on EXPERIMENTAL
  869. help
  870. kexec is a system call that implements the ability to shutdown your
  871. current kernel, and to start another kernel. It is like a reboot
  872. but it is independent of the system firmware. And like a reboot
  873. you can start any kernel with it, not just Linux.
  874. It is an ongoing process to be certain the hardware in a machine
  875. is properly shutdown, so do not be surprised if this code does not
  876. initially work for you. It may help to enable device hotplugging
  877. support.
  878. config ATAGS_PROC
  879. bool "Export atags in procfs"
  880. depends on KEXEC
  881. default y
  882. help
  883. Should the atags used to boot the kernel be exported in an "atags"
  884. file in procfs. Useful with kexec.
  885. endmenu
  886. menu "CPU Power Management"
  887. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
  888. source "drivers/cpufreq/Kconfig"
  889. config CPU_FREQ_SA1100
  890. bool
  891. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  892. default y
  893. config CPU_FREQ_SA1110
  894. bool
  895. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  896. default y
  897. config CPU_FREQ_INTEGRATOR
  898. tristate "CPUfreq driver for ARM Integrator CPUs"
  899. depends on ARCH_INTEGRATOR && CPU_FREQ
  900. default y
  901. help
  902. This enables the CPUfreq driver for ARM Integrator CPUs.
  903. For details, take a look at <file:Documentation/cpu-freq>.
  904. If in doubt, say Y.
  905. config CPU_FREQ_IMX
  906. tristate "CPUfreq driver for i.MX CPUs"
  907. depends on ARCH_IMX && CPU_FREQ
  908. default n
  909. help
  910. This enables the CPUfreq driver for i.MX CPUs.
  911. If in doubt, say N.
  912. config CPU_FREQ_PXA
  913. bool
  914. depends on CPU_FREQ && ARCH_PXA && PXA25x
  915. default y
  916. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  917. endif
  918. source "drivers/cpuidle/Kconfig"
  919. endmenu
  920. menu "Floating point emulation"
  921. comment "At least one emulation must be selected"
  922. config FPE_NWFPE
  923. bool "NWFPE math emulation"
  924. depends on !AEABI || OABI_COMPAT
  925. ---help---
  926. Say Y to include the NWFPE floating point emulator in the kernel.
  927. This is necessary to run most binaries. Linux does not currently
  928. support floating point hardware so you need to say Y here even if
  929. your machine has an FPA or floating point co-processor podule.
  930. You may say N here if you are going to load the Acorn FPEmulator
  931. early in the bootup.
  932. config FPE_NWFPE_XP
  933. bool "Support extended precision"
  934. depends on FPE_NWFPE
  935. help
  936. Say Y to include 80-bit support in the kernel floating-point
  937. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  938. Note that gcc does not generate 80-bit operations by default,
  939. so in most cases this option only enlarges the size of the
  940. floating point emulator without any good reason.
  941. You almost surely want to say N here.
  942. config FPE_FASTFPE
  943. bool "FastFPE math emulation (EXPERIMENTAL)"
  944. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  945. ---help---
  946. Say Y here to include the FAST floating point emulator in the kernel.
  947. This is an experimental much faster emulator which now also has full
  948. precision for the mantissa. It does not support any exceptions.
  949. It is very simple, and approximately 3-6 times faster than NWFPE.
  950. It should be sufficient for most programs. It may be not suitable
  951. for scientific calculations, but you have to check this for yourself.
  952. If you do not feel you need a faster FP emulation you should better
  953. choose NWFPE.
  954. config VFP
  955. bool "VFP-format floating point maths"
  956. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  957. help
  958. Say Y to include VFP support code in the kernel. This is needed
  959. if your hardware includes a VFP unit.
  960. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  961. release notes and additional status information.
  962. Say N if your target does not have VFP hardware.
  963. config VFPv3
  964. bool
  965. depends on VFP
  966. default y if CPU_V7
  967. config NEON
  968. bool "Advanced SIMD (NEON) Extension support"
  969. depends on VFPv3 && CPU_V7
  970. help
  971. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  972. Extension.
  973. endmenu
  974. menu "Userspace binary formats"
  975. source "fs/Kconfig.binfmt"
  976. config ARTHUR
  977. tristate "RISC OS personality"
  978. depends on !AEABI
  979. help
  980. Say Y here to include the kernel code necessary if you want to run
  981. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  982. experimental; if this sounds frightening, say N and sleep in peace.
  983. You can also say M here to compile this support as a module (which
  984. will be called arthur).
  985. endmenu
  986. menu "Power management options"
  987. source "kernel/power/Kconfig"
  988. config ARCH_SUSPEND_POSSIBLE
  989. def_bool y
  990. endmenu
  991. source "net/Kconfig"
  992. menu "Device Drivers"
  993. source "drivers/base/Kconfig"
  994. source "drivers/connector/Kconfig"
  995. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  996. source "drivers/mtd/Kconfig"
  997. endif
  998. source "drivers/parport/Kconfig"
  999. source "drivers/pnp/Kconfig"
  1000. source "drivers/block/Kconfig"
  1001. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  1002. source "drivers/misc/Kconfig"
  1003. source "drivers/ide/Kconfig"
  1004. source "drivers/scsi/Kconfig"
  1005. source "drivers/ata/Kconfig"
  1006. source "drivers/md/Kconfig"
  1007. source "drivers/message/fusion/Kconfig"
  1008. source "drivers/ieee1394/Kconfig"
  1009. source "drivers/message/i2o/Kconfig"
  1010. source "drivers/net/Kconfig"
  1011. source "drivers/isdn/Kconfig"
  1012. # input before char - char/joystick depends on it. As does USB.
  1013. source "drivers/input/Kconfig"
  1014. source "drivers/char/Kconfig"
  1015. source "drivers/i2c/Kconfig"
  1016. source "drivers/spi/Kconfig"
  1017. source "drivers/gpio/Kconfig"
  1018. source "drivers/w1/Kconfig"
  1019. source "drivers/power/Kconfig"
  1020. source "drivers/hwmon/Kconfig"
  1021. source "drivers/thermal/Kconfig"
  1022. source "drivers/watchdog/Kconfig"
  1023. source "drivers/ssb/Kconfig"
  1024. #source "drivers/l3/Kconfig"
  1025. source "drivers/mfd/Kconfig"
  1026. source "drivers/media/Kconfig"
  1027. source "drivers/video/Kconfig"
  1028. source "sound/Kconfig"
  1029. source "drivers/hid/Kconfig"
  1030. source "drivers/usb/Kconfig"
  1031. source "drivers/uwb/Kconfig"
  1032. source "drivers/mmc/Kconfig"
  1033. source "drivers/memstick/Kconfig"
  1034. source "drivers/accessibility/Kconfig"
  1035. source "drivers/leds/Kconfig"
  1036. source "drivers/rtc/Kconfig"
  1037. source "drivers/dma/Kconfig"
  1038. source "drivers/dca/Kconfig"
  1039. source "drivers/auxdisplay/Kconfig"
  1040. source "drivers/regulator/Kconfig"
  1041. source "drivers/uio/Kconfig"
  1042. endmenu
  1043. source "fs/Kconfig"
  1044. source "arch/arm/Kconfig.debug"
  1045. source "security/Kconfig"
  1046. source "crypto/Kconfig"
  1047. source "lib/Kconfig"