Kconfig 31 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 ARM_AMBA
  157. select HAVE_CLK
  158. help
  159. This enables support for systems based on the Agilent AAEC-2000
  160. config ARCH_INTEGRATOR
  161. bool "ARM Ltd. Integrator family"
  162. select ARM_AMBA
  163. select HAVE_CLK
  164. select ICST525
  165. help
  166. Support for ARM's Integrator platform.
  167. config ARCH_REALVIEW
  168. bool "ARM Ltd. RealView family"
  169. select ARM_AMBA
  170. select HAVE_CLK
  171. select ICST307
  172. select GENERIC_TIME
  173. select GENERIC_CLOCKEVENTS
  174. help
  175. This enables support for ARM Ltd RealView boards.
  176. config ARCH_VERSATILE
  177. bool "ARM Ltd. Versatile family"
  178. select ARM_AMBA
  179. select ARM_VIC
  180. select HAVE_CLK
  181. select ICST307
  182. select GENERIC_TIME
  183. select GENERIC_CLOCKEVENTS
  184. help
  185. This enables support for ARM Ltd Versatile board.
  186. config ARCH_AT91
  187. bool "Atmel AT91"
  188. select GENERIC_GPIO
  189. select HAVE_CLK
  190. help
  191. This enables support for systems based on the Atmel AT91RM9200,
  192. AT91SAM9 and AT91CAP9 processors.
  193. config ARCH_CLPS7500
  194. bool "Cirrus CL-PS7500FE"
  195. select TIMER_ACORN
  196. select ISA
  197. select NO_IOPORT
  198. select ARCH_SPARSEMEM_ENABLE
  199. help
  200. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  201. config ARCH_CLPS711X
  202. bool "Cirrus Logic CLPS711x/EP721x-based"
  203. help
  204. Support for Cirrus Logic 711x/721x based boards.
  205. config ARCH_EBSA110
  206. bool "EBSA-110"
  207. select ISA
  208. select NO_IOPORT
  209. help
  210. This is an evaluation board for the StrongARM processor available
  211. from Digital. It has limited hardware on-board, including an
  212. Ethernet interface, two PCMCIA sockets, two serial ports and a
  213. parallel port.
  214. config ARCH_EP93XX
  215. bool "EP93xx-based"
  216. select ARM_AMBA
  217. select ARM_VIC
  218. select GENERIC_GPIO
  219. select HAVE_CLK
  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 FOOTBRIDGE
  226. help
  227. Support for systems based on the DC21285 companion chip
  228. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  229. config ARCH_NETX
  230. bool "Hilscher NetX based"
  231. select ARM_VIC
  232. select GENERIC_CLOCKEVENTS
  233. select GENERIC_TIME
  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 ISA_DMA_API
  239. help
  240. This enables support for systems based on the Hynix HMS720x
  241. config ARCH_IMX
  242. bool "IMX"
  243. select GENERIC_GPIO
  244. select GENERIC_TIME
  245. select GENERIC_CLOCKEVENTS
  246. help
  247. Support for Motorola's i.MX family of processors (MX1, MXL).
  248. config ARCH_IOP13XX
  249. bool "IOP13xx-based"
  250. depends on MMU
  251. select PLAT_IOP
  252. select PCI
  253. select ARCH_SUPPORTS_MSI
  254. select VMSPLIT_1G
  255. help
  256. Support for Intel's IOP13XX (XScale) family of processors.
  257. config ARCH_IOP32X
  258. bool "IOP32x-based"
  259. depends on MMU
  260. select PLAT_IOP
  261. select PCI
  262. select GENERIC_GPIO
  263. select ARCH_REQUIRE_GPIOLIB
  264. help
  265. Support for Intel's 80219 and IOP32X (XScale) family of
  266. processors.
  267. config ARCH_IOP33X
  268. bool "IOP33x-based"
  269. depends on MMU
  270. select PLAT_IOP
  271. select PCI
  272. select GENERIC_GPIO
  273. select ARCH_REQUIRE_GPIOLIB
  274. help
  275. Support for Intel's IOP33X (XScale) family of processors.
  276. config ARCH_IXP23XX
  277. bool "IXP23XX-based"
  278. depends on MMU
  279. select PCI
  280. help
  281. Support for Intel's IXP23xx (XScale) family of processors.
  282. config ARCH_IXP2000
  283. bool "IXP2400/2800-based"
  284. depends on MMU
  285. select PCI
  286. help
  287. Support for Intel's IXP2400/2800 (XScale) family of processors.
  288. config ARCH_IXP4XX
  289. bool "IXP4xx-based"
  290. depends on MMU
  291. select GENERIC_GPIO
  292. select GENERIC_TIME
  293. select GENERIC_CLOCKEVENTS
  294. select DMABOUNCE if PCI
  295. help
  296. Support for Intel's IXP4XX (XScale) family of processors.
  297. config ARCH_L7200
  298. bool "LinkUp-L7200"
  299. select FIQ
  300. help
  301. Say Y here if you intend to run this kernel on a LinkUp Systems
  302. L7200 Software Development Board which uses an ARM720T processor.
  303. Information on this board can be obtained at:
  304. <http://www.linkupsys.com/>
  305. If you have any questions or comments about the Linux kernel port
  306. to this board, send e-mail to <sjhill@cotw.com>.
  307. config ARCH_KIRKWOOD
  308. bool "Marvell Kirkwood"
  309. select PCI
  310. select GENERIC_TIME
  311. select GENERIC_CLOCKEVENTS
  312. select PLAT_ORION
  313. help
  314. Support for the following Marvell Kirkwood series SoCs:
  315. 88F6180, 88F6192 and 88F6281.
  316. config ARCH_KS8695
  317. bool "Micrel/Kendin KS8695"
  318. select GENERIC_GPIO
  319. help
  320. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  321. System-on-Chip devices.
  322. config ARCH_NS9XXX
  323. bool "NetSilicon NS9xxx"
  324. select GENERIC_GPIO
  325. select GENERIC_TIME
  326. select GENERIC_CLOCKEVENTS
  327. select HAVE_CLK
  328. help
  329. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  330. System.
  331. <http://www.digi.com/products/microprocessors/index.jsp>
  332. config ARCH_LOKI
  333. bool "Marvell Loki (88RC8480)"
  334. select GENERIC_TIME
  335. select GENERIC_CLOCKEVENTS
  336. select PLAT_ORION
  337. help
  338. Support for the Marvell Loki (88RC8480) SoC.
  339. config ARCH_MV78XX0
  340. bool "Marvell MV78xx0"
  341. select PCI
  342. select GENERIC_TIME
  343. select GENERIC_CLOCKEVENTS
  344. select PLAT_ORION
  345. help
  346. Support for the following Marvell MV78xx0 series SoCs:
  347. MV781x0, MV782x0.
  348. config ARCH_MXC
  349. bool "Freescale MXC/iMX-based"
  350. select GENERIC_TIME
  351. select GENERIC_CLOCKEVENTS
  352. select ARCH_MTD_XIP
  353. select GENERIC_GPIO
  354. select ARCH_REQUIRE_GPIOLIB
  355. help
  356. Support for Freescale MXC/iMX-based family of processors
  357. config ARCH_ORION5X
  358. bool "Marvell Orion"
  359. depends on MMU
  360. select PCI
  361. select GENERIC_GPIO
  362. select GENERIC_TIME
  363. select GENERIC_CLOCKEVENTS
  364. select PLAT_ORION
  365. help
  366. Support for the following Marvell Orion 5x series SoCs:
  367. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  368. Orion-2 (5281), Orion-1-90 (6183).
  369. config ARCH_PNX4008
  370. bool "Philips Nexperia PNX4008 Mobile"
  371. select HAVE_CLK
  372. help
  373. This enables support for Philips PNX4008 mobile platform.
  374. config ARCH_PXA
  375. bool "PXA2xx/PXA3xx-based"
  376. depends on MMU
  377. select ARCH_MTD_XIP
  378. select GENERIC_GPIO
  379. select HAVE_CLK
  380. select ARCH_REQUIRE_GPIOLIB
  381. select GENERIC_TIME
  382. select GENERIC_CLOCKEVENTS
  383. select TICK_ONESHOT
  384. help
  385. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  386. config ARCH_RPC
  387. bool "RiscPC"
  388. select ARCH_ACORN
  389. select FIQ
  390. select TIMER_ACORN
  391. select ARCH_MAY_HAVE_PC_FDC
  392. select HAVE_PATA_PLATFORM
  393. select ISA_DMA_API
  394. select NO_IOPORT
  395. select ARCH_SPARSEMEM_ENABLE
  396. help
  397. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  398. CD-ROM interface, serial and parallel port, and the floppy drive.
  399. config ARCH_SA1100
  400. bool "SA1100-based"
  401. select ISA
  402. select ARCH_SPARSEMEM_ENABLE
  403. select ARCH_MTD_XIP
  404. select GENERIC_GPIO
  405. select GENERIC_TIME
  406. select GENERIC_CLOCKEVENTS
  407. select HAVE_CLK
  408. select TICK_ONESHOT
  409. select ARCH_REQUIRE_GPIOLIB
  410. help
  411. Support for StrongARM 11x0 based boards.
  412. config ARCH_S3C2410
  413. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  414. select GENERIC_GPIO
  415. select HAVE_CLK
  416. help
  417. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  418. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  419. the Samsung SMDK2410 development board (and derivatives).
  420. config ARCH_SHARK
  421. bool "Shark"
  422. select ISA
  423. select ISA_DMA
  424. select ZONE_DMA
  425. select PCI
  426. help
  427. Support for the StrongARM based Digital DNARD machine, also known
  428. as "Shark" (<http://www.shark-linux.de/shark.html>).
  429. config ARCH_LH7A40X
  430. bool "Sharp LH7A40X"
  431. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  432. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  433. help
  434. Say Y here for systems based on one of the Sharp LH7A40X
  435. System on a Chip processors. These CPUs include an ARM922T
  436. core with a wide array of integrated devices for
  437. hand-held and low-power applications.
  438. config ARCH_DAVINCI
  439. bool "TI DaVinci"
  440. select GENERIC_TIME
  441. select GENERIC_CLOCKEVENTS
  442. select GENERIC_GPIO
  443. select ARCH_REQUIRE_GPIOLIB
  444. select HAVE_CLK
  445. select ZONE_DMA
  446. help
  447. Support for TI's DaVinci platform.
  448. config ARCH_OMAP
  449. bool "TI OMAP"
  450. select GENERIC_GPIO
  451. select HAVE_CLK
  452. select ARCH_REQUIRE_GPIOLIB
  453. select GENERIC_TIME
  454. select GENERIC_CLOCKEVENTS
  455. help
  456. Support for TI's OMAP platform (OMAP1 and OMAP2).
  457. config ARCH_MSM
  458. bool "Qualcomm MSM"
  459. select GENERIC_TIME
  460. select GENERIC_CLOCKEVENTS
  461. help
  462. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  463. apps processor of the MSM7K and depends on a shared memory
  464. interface to the ARM9 modem processor which runs the baseband stack
  465. and controls some vital subsystems (clock and power control, etc).
  466. endchoice
  467. source "arch/arm/mach-clps711x/Kconfig"
  468. source "arch/arm/mach-ep93xx/Kconfig"
  469. source "arch/arm/mach-footbridge/Kconfig"
  470. source "arch/arm/mach-integrator/Kconfig"
  471. source "arch/arm/mach-iop32x/Kconfig"
  472. source "arch/arm/mach-iop33x/Kconfig"
  473. source "arch/arm/mach-iop13xx/Kconfig"
  474. source "arch/arm/mach-ixp4xx/Kconfig"
  475. source "arch/arm/mach-ixp2000/Kconfig"
  476. source "arch/arm/mach-ixp23xx/Kconfig"
  477. source "arch/arm/mach-loki/Kconfig"
  478. source "arch/arm/mach-mv78xx0/Kconfig"
  479. source "arch/arm/mach-pxa/Kconfig"
  480. source "arch/arm/mach-sa1100/Kconfig"
  481. source "arch/arm/plat-omap/Kconfig"
  482. source "arch/arm/mach-omap1/Kconfig"
  483. source "arch/arm/mach-omap2/Kconfig"
  484. source "arch/arm/mach-orion5x/Kconfig"
  485. source "arch/arm/mach-kirkwood/Kconfig"
  486. source "arch/arm/plat-s3c24xx/Kconfig"
  487. source "arch/arm/plat-s3c/Kconfig"
  488. if ARCH_S3C2410
  489. source "arch/arm/mach-s3c2400/Kconfig"
  490. source "arch/arm/mach-s3c2410/Kconfig"
  491. source "arch/arm/mach-s3c2412/Kconfig"
  492. source "arch/arm/mach-s3c2440/Kconfig"
  493. source "arch/arm/mach-s3c2442/Kconfig"
  494. source "arch/arm/mach-s3c2443/Kconfig"
  495. endif
  496. source "arch/arm/mach-lh7a40x/Kconfig"
  497. source "arch/arm/mach-imx/Kconfig"
  498. source "arch/arm/mach-h720x/Kconfig"
  499. source "arch/arm/mach-versatile/Kconfig"
  500. source "arch/arm/mach-aaec2000/Kconfig"
  501. source "arch/arm/mach-realview/Kconfig"
  502. source "arch/arm/mach-at91/Kconfig"
  503. source "arch/arm/plat-mxc/Kconfig"
  504. source "arch/arm/mach-netx/Kconfig"
  505. source "arch/arm/mach-ns9xxx/Kconfig"
  506. source "arch/arm/mach-davinci/Kconfig"
  507. source "arch/arm/mach-ks8695/Kconfig"
  508. source "arch/arm/mach-msm/Kconfig"
  509. # Definitions to make life easier
  510. config ARCH_ACORN
  511. bool
  512. config PLAT_IOP
  513. bool
  514. config PLAT_ORION
  515. bool
  516. source arch/arm/mm/Kconfig
  517. config IWMMXT
  518. bool "Enable iWMMXt support"
  519. depends on CPU_XSCALE || CPU_XSC3
  520. default y if PXA27x || PXA3xx
  521. help
  522. Enable support for iWMMXt context switching at run time if
  523. running on a CPU that supports it.
  524. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  525. config XSCALE_PMU
  526. bool
  527. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  528. default y
  529. if !MMU
  530. source "arch/arm/Kconfig-nommu"
  531. endif
  532. endmenu
  533. source "arch/arm/common/Kconfig"
  534. config FORCE_MAX_ZONEORDER
  535. int
  536. depends on SA1111
  537. default "9"
  538. menu "Bus support"
  539. config ARM_AMBA
  540. bool
  541. config ISA
  542. bool
  543. help
  544. Find out whether you have ISA slots on your motherboard. ISA is the
  545. name of a bus system, i.e. the way the CPU talks to the other stuff
  546. inside your box. Other bus systems are PCI, EISA, MicroChannel
  547. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  548. newer boards don't support it. If you have ISA, say Y, otherwise N.
  549. # Select ISA DMA controller support
  550. config ISA_DMA
  551. bool
  552. select ISA_DMA_API
  553. # Select ISA DMA interface
  554. config ISA_DMA_API
  555. bool
  556. config PCI
  557. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  558. help
  559. Find out whether you have a PCI motherboard. PCI is the name of a
  560. bus system, i.e. the way the CPU talks to the other stuff inside
  561. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  562. VESA. If you have PCI, say Y, otherwise N.
  563. config PCI_SYSCALL
  564. def_bool PCI
  565. # Select the host bridge type
  566. config PCI_HOST_VIA82C505
  567. bool
  568. depends on PCI && ARCH_SHARK
  569. default y
  570. config PCI_HOST_ITE8152
  571. bool
  572. depends on PCI && MACH_ARMCORE
  573. default y
  574. select DMABOUNCE
  575. source "drivers/pci/Kconfig"
  576. source "drivers/pcmcia/Kconfig"
  577. endmenu
  578. menu "Kernel Features"
  579. source "kernel/time/Kconfig"
  580. config SMP
  581. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  582. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  583. select USE_GENERIC_SMP_HELPERS
  584. help
  585. This enables support for systems with more than one CPU. If you have
  586. a system with only one CPU, like most personal computers, say N. If
  587. you have a system with more than one CPU, say Y.
  588. If you say N here, the kernel will run on single and multiprocessor
  589. machines, but will use only one CPU of a multiprocessor machine. If
  590. you say Y here, the kernel will run on many, but not all, single
  591. processor machines. On a single processor machine, the kernel will
  592. run faster if you say N here.
  593. See also <file:Documentation/i386/IO-APIC.txt>,
  594. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  595. <http://www.linuxdoc.org/docs.html#howto>.
  596. If you don't know what to do here, say N.
  597. choice
  598. prompt "Memory split"
  599. default VMSPLIT_3G
  600. help
  601. Select the desired split between kernel and user memory.
  602. If you are not absolutely sure what you are doing, leave this
  603. option alone!
  604. config VMSPLIT_3G
  605. bool "3G/1G user/kernel split"
  606. config VMSPLIT_2G
  607. bool "2G/2G user/kernel split"
  608. config VMSPLIT_1G
  609. bool "1G/3G user/kernel split"
  610. endchoice
  611. config PAGE_OFFSET
  612. hex
  613. default 0x40000000 if VMSPLIT_1G
  614. default 0x80000000 if VMSPLIT_2G
  615. default 0xC0000000
  616. config NR_CPUS
  617. int "Maximum number of CPUs (2-32)"
  618. range 2 32
  619. depends on SMP
  620. default "4"
  621. config HOTPLUG_CPU
  622. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  623. depends on SMP && HOTPLUG && EXPERIMENTAL
  624. help
  625. Say Y here to experiment with turning CPUs off and on. CPUs
  626. can be controlled through /sys/devices/system/cpu.
  627. config LOCAL_TIMERS
  628. bool "Use local timer interrupts"
  629. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  630. default y
  631. help
  632. Enable support for local timers on SMP platforms, rather then the
  633. legacy IPI broadcast method. Local timers allows the system
  634. accounting to be spread across the timer interval, preventing a
  635. "thundering herd" at every timer tick.
  636. config PREEMPT
  637. bool "Preemptible Kernel (EXPERIMENTAL)"
  638. depends on EXPERIMENTAL
  639. help
  640. This option reduces the latency of the kernel when reacting to
  641. real-time or interactive events by allowing a low priority process to
  642. be preempted even if it is in kernel mode executing a system call.
  643. This allows applications to run more reliably even when the system is
  644. under load.
  645. Say Y here if you are building a kernel for a desktop, embedded
  646. or real-time system. Say N if you are unsure.
  647. config HZ
  648. int
  649. default 128 if ARCH_L7200
  650. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  651. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  652. default AT91_TIMER_HZ if ARCH_AT91
  653. default 100
  654. config AEABI
  655. bool "Use the ARM EABI to compile the kernel"
  656. help
  657. This option allows for the kernel to be compiled using the latest
  658. ARM ABI (aka EABI). This is only useful if you are using a user
  659. space environment that is also compiled with EABI.
  660. Since there are major incompatibilities between the legacy ABI and
  661. EABI, especially with regard to structure member alignment, this
  662. option also changes the kernel syscall calling convention to
  663. disambiguate both ABIs and allow for backward compatibility support
  664. (selected with CONFIG_OABI_COMPAT).
  665. To use this you need GCC version 4.0.0 or later.
  666. config OABI_COMPAT
  667. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  668. depends on AEABI && EXPERIMENTAL
  669. default y
  670. help
  671. This option preserves the old syscall interface along with the
  672. new (ARM EABI) one. It also provides a compatibility layer to
  673. intercept syscalls that have structure arguments which layout
  674. in memory differs between the legacy ABI and the new ARM EABI
  675. (only for non "thumb" binaries). This option adds a tiny
  676. overhead to all syscalls and produces a slightly larger kernel.
  677. If you know you'll be using only pure EABI user space then you
  678. can say N here. If this option is not selected and you attempt
  679. to execute a legacy ABI binary then the result will be
  680. UNPREDICTABLE (in fact it can be predicted that it won't work
  681. at all). If in doubt say Y.
  682. config ARCH_FLATMEM_HAS_HOLES
  683. bool
  684. default y
  685. depends on FLATMEM
  686. # Discontigmem is deprecated
  687. config ARCH_DISCONTIGMEM_ENABLE
  688. bool
  689. config ARCH_SPARSEMEM_ENABLE
  690. bool
  691. config ARCH_SPARSEMEM_DEFAULT
  692. def_bool ARCH_SPARSEMEM_ENABLE
  693. config ARCH_SELECT_MEMORY_MODEL
  694. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  695. config NODES_SHIFT
  696. int
  697. default "4" if ARCH_LH7A40X
  698. default "2"
  699. depends on NEED_MULTIPLE_NODES
  700. source "mm/Kconfig"
  701. config LEDS
  702. bool "Timer and CPU usage LEDs"
  703. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  704. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  705. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  706. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  707. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  708. ARCH_AT91 || ARCH_DAVINCI || \
  709. ARCH_KS8695 || MACH_RD88F5182
  710. help
  711. If you say Y here, the LEDs on your machine will be used
  712. to provide useful information about your current system status.
  713. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  714. be able to select which LEDs are active using the options below. If
  715. you are compiling a kernel for the EBSA-110 or the LART however, the
  716. red LED will simply flash regularly to indicate that the system is
  717. still functional. It is safe to say Y here if you have a CATS
  718. system, but the driver will do nothing.
  719. config LEDS_TIMER
  720. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  721. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  722. || MACH_OMAP_PERSEUS2
  723. depends on LEDS
  724. depends on !GENERIC_CLOCKEVENTS
  725. default y if ARCH_EBSA110
  726. help
  727. If you say Y here, one of the system LEDs (the green one on the
  728. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  729. will flash regularly to indicate that the system is still
  730. operational. This is mainly useful to kernel hackers who are
  731. debugging unstable kernels.
  732. The LART uses the same LED for both Timer LED and CPU usage LED
  733. functions. You may choose to use both, but the Timer LED function
  734. will overrule the CPU usage LED.
  735. config LEDS_CPU
  736. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  737. !ARCH_OMAP) \
  738. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  739. || MACH_OMAP_PERSEUS2
  740. depends on LEDS
  741. help
  742. If you say Y here, the red LED will be used to give a good real
  743. time indication of CPU usage, by lighting whenever the idle task
  744. is not currently executing.
  745. The LART uses the same LED for both Timer LED and CPU usage LED
  746. functions. You may choose to use both, but the Timer LED function
  747. will overrule the CPU usage LED.
  748. config ALIGNMENT_TRAP
  749. bool
  750. depends on CPU_CP15_MMU
  751. default y if !ARCH_EBSA110
  752. help
  753. ARM processors cannot fetch/store information which is not
  754. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  755. address divisible by 4. On 32-bit ARM processors, these non-aligned
  756. fetch/store instructions will be emulated in software if you say
  757. here, which has a severe performance impact. This is necessary for
  758. correct operation of some network protocols. With an IP-only
  759. configuration it is safe to say N, otherwise say Y.
  760. endmenu
  761. menu "Boot options"
  762. # Compressed boot loader in ROM. Yes, we really want to ask about
  763. # TEXT and BSS so we preserve their values in the config files.
  764. config ZBOOT_ROM_TEXT
  765. hex "Compressed ROM boot loader base address"
  766. default "0"
  767. help
  768. The physical address at which the ROM-able zImage is to be
  769. placed in the target. Platforms which normally make use of
  770. ROM-able zImage formats normally set this to a suitable
  771. value in their defconfig file.
  772. If ZBOOT_ROM is not enabled, this has no effect.
  773. config ZBOOT_ROM_BSS
  774. hex "Compressed ROM boot loader BSS address"
  775. default "0"
  776. help
  777. The base address of an area of read/write memory in the target
  778. for the ROM-able zImage which must be available while the
  779. decompressor is running. It must be large enough to hold the
  780. entire decompressed kernel plus an additional 128 KiB.
  781. Platforms which normally make use of ROM-able zImage formats
  782. normally set this to a suitable value in their defconfig file.
  783. If ZBOOT_ROM is not enabled, this has no effect.
  784. config ZBOOT_ROM
  785. bool "Compressed boot loader in ROM/flash"
  786. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  787. help
  788. Say Y here if you intend to execute your compressed kernel image
  789. (zImage) directly from ROM or flash. If unsure, say N.
  790. config CMDLINE
  791. string "Default kernel command string"
  792. default ""
  793. help
  794. On some architectures (EBSA110 and CATS), there is currently no way
  795. for the boot loader to pass arguments to the kernel. For these
  796. architectures, you should supply some command-line options at build
  797. time by entering them here. As a minimum, you should specify the
  798. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  799. config XIP_KERNEL
  800. bool "Kernel Execute-In-Place from ROM"
  801. depends on !ZBOOT_ROM
  802. help
  803. Execute-In-Place allows the kernel to run from non-volatile storage
  804. directly addressable by the CPU, such as NOR flash. This saves RAM
  805. space since the text section of the kernel is not loaded from flash
  806. to RAM. Read-write sections, such as the data section and stack,
  807. are still copied to RAM. The XIP kernel is not compressed since
  808. it has to run directly from flash, so it will take more space to
  809. store it. The flash address used to link the kernel object files,
  810. and for storing it, is configuration dependent. Therefore, if you
  811. say Y here, you must know the proper physical address where to
  812. store the kernel image depending on your own flash memory usage.
  813. Also note that the make target becomes "make xipImage" rather than
  814. "make zImage" or "make Image". The final kernel binary to put in
  815. ROM memory will be arch/arm/boot/xipImage.
  816. If unsure, say N.
  817. config XIP_PHYS_ADDR
  818. hex "XIP Kernel Physical Location"
  819. depends on XIP_KERNEL
  820. default "0x00080000"
  821. help
  822. This is the physical address in your flash memory the kernel will
  823. be linked for and stored to. This address is dependent on your
  824. own flash usage.
  825. config KEXEC
  826. bool "Kexec system call (EXPERIMENTAL)"
  827. depends on EXPERIMENTAL
  828. help
  829. kexec is a system call that implements the ability to shutdown your
  830. current kernel, and to start another kernel. It is like a reboot
  831. but it is independent of the system firmware. And like a reboot
  832. you can start any kernel with it, not just Linux.
  833. It is an ongoing process to be certain the hardware in a machine
  834. is properly shutdown, so do not be surprised if this code does not
  835. initially work for you. It may help to enable device hotplugging
  836. support.
  837. config ATAGS_PROC
  838. bool "Export atags in procfs"
  839. depends on KEXEC
  840. default y
  841. help
  842. Should the atags used to boot the kernel be exported in an "atags"
  843. file in procfs. Useful with kexec.
  844. endmenu
  845. menu "CPU Power Management"
  846. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
  847. source "drivers/cpufreq/Kconfig"
  848. config CPU_FREQ_SA1100
  849. bool
  850. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  851. default y
  852. config CPU_FREQ_SA1110
  853. bool
  854. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  855. default y
  856. config CPU_FREQ_INTEGRATOR
  857. tristate "CPUfreq driver for ARM Integrator CPUs"
  858. depends on ARCH_INTEGRATOR && CPU_FREQ
  859. default y
  860. help
  861. This enables the CPUfreq driver for ARM Integrator CPUs.
  862. For details, take a look at <file:Documentation/cpu-freq>.
  863. If in doubt, say Y.
  864. config CPU_FREQ_IMX
  865. tristate "CPUfreq driver for i.MX CPUs"
  866. depends on ARCH_IMX && CPU_FREQ
  867. default n
  868. help
  869. This enables the CPUfreq driver for i.MX CPUs.
  870. If in doubt, say N.
  871. config CPU_FREQ_PXA
  872. bool
  873. depends on CPU_FREQ && ARCH_PXA && PXA25x
  874. default y
  875. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  876. endif
  877. source "drivers/cpuidle/Kconfig"
  878. endmenu
  879. menu "Floating point emulation"
  880. comment "At least one emulation must be selected"
  881. config FPE_NWFPE
  882. bool "NWFPE math emulation"
  883. depends on !AEABI || OABI_COMPAT
  884. ---help---
  885. Say Y to include the NWFPE floating point emulator in the kernel.
  886. This is necessary to run most binaries. Linux does not currently
  887. support floating point hardware so you need to say Y here even if
  888. your machine has an FPA or floating point co-processor podule.
  889. You may say N here if you are going to load the Acorn FPEmulator
  890. early in the bootup.
  891. config FPE_NWFPE_XP
  892. bool "Support extended precision"
  893. depends on FPE_NWFPE
  894. help
  895. Say Y to include 80-bit support in the kernel floating-point
  896. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  897. Note that gcc does not generate 80-bit operations by default,
  898. so in most cases this option only enlarges the size of the
  899. floating point emulator without any good reason.
  900. You almost surely want to say N here.
  901. config FPE_FASTFPE
  902. bool "FastFPE math emulation (EXPERIMENTAL)"
  903. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  904. ---help---
  905. Say Y here to include the FAST floating point emulator in the kernel.
  906. This is an experimental much faster emulator which now also has full
  907. precision for the mantissa. It does not support any exceptions.
  908. It is very simple, and approximately 3-6 times faster than NWFPE.
  909. It should be sufficient for most programs. It may be not suitable
  910. for scientific calculations, but you have to check this for yourself.
  911. If you do not feel you need a faster FP emulation you should better
  912. choose NWFPE.
  913. config VFP
  914. bool "VFP-format floating point maths"
  915. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  916. help
  917. Say Y to include VFP support code in the kernel. This is needed
  918. if your hardware includes a VFP unit.
  919. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  920. release notes and additional status information.
  921. Say N if your target does not have VFP hardware.
  922. config VFPv3
  923. bool
  924. depends on VFP
  925. default y if CPU_V7
  926. config NEON
  927. bool "Advanced SIMD (NEON) Extension support"
  928. depends on VFPv3 && CPU_V7
  929. help
  930. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  931. Extension.
  932. endmenu
  933. menu "Userspace binary formats"
  934. source "fs/Kconfig.binfmt"
  935. config ARTHUR
  936. tristate "RISC OS personality"
  937. depends on !AEABI
  938. help
  939. Say Y here to include the kernel code necessary if you want to run
  940. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  941. experimental; if this sounds frightening, say N and sleep in peace.
  942. You can also say M here to compile this support as a module (which
  943. will be called arthur).
  944. endmenu
  945. menu "Power management options"
  946. source "kernel/power/Kconfig"
  947. config ARCH_SUSPEND_POSSIBLE
  948. def_bool y
  949. endmenu
  950. source "net/Kconfig"
  951. menu "Device Drivers"
  952. source "drivers/base/Kconfig"
  953. source "drivers/connector/Kconfig"
  954. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  955. source "drivers/mtd/Kconfig"
  956. endif
  957. source "drivers/parport/Kconfig"
  958. source "drivers/pnp/Kconfig"
  959. source "drivers/block/Kconfig"
  960. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  961. source "drivers/misc/Kconfig"
  962. source "drivers/ide/Kconfig"
  963. source "drivers/scsi/Kconfig"
  964. source "drivers/ata/Kconfig"
  965. source "drivers/md/Kconfig"
  966. source "drivers/message/fusion/Kconfig"
  967. source "drivers/ieee1394/Kconfig"
  968. source "drivers/message/i2o/Kconfig"
  969. source "drivers/net/Kconfig"
  970. source "drivers/isdn/Kconfig"
  971. # input before char - char/joystick depends on it. As does USB.
  972. source "drivers/input/Kconfig"
  973. source "drivers/char/Kconfig"
  974. source "drivers/i2c/Kconfig"
  975. source "drivers/spi/Kconfig"
  976. source "drivers/gpio/Kconfig"
  977. source "drivers/w1/Kconfig"
  978. source "drivers/power/Kconfig"
  979. source "drivers/hwmon/Kconfig"
  980. source "drivers/thermal/Kconfig"
  981. source "drivers/watchdog/Kconfig"
  982. source "drivers/ssb/Kconfig"
  983. #source "drivers/l3/Kconfig"
  984. source "drivers/mfd/Kconfig"
  985. source "drivers/media/Kconfig"
  986. source "drivers/video/Kconfig"
  987. source "sound/Kconfig"
  988. source "drivers/hid/Kconfig"
  989. source "drivers/usb/Kconfig"
  990. source "drivers/uwb/Kconfig"
  991. source "drivers/mmc/Kconfig"
  992. source "drivers/memstick/Kconfig"
  993. source "drivers/accessibility/Kconfig"
  994. source "drivers/leds/Kconfig"
  995. source "drivers/rtc/Kconfig"
  996. source "drivers/dma/Kconfig"
  997. source "drivers/dca/Kconfig"
  998. source "drivers/auxdisplay/Kconfig"
  999. source "drivers/regulator/Kconfig"
  1000. source "drivers/uio/Kconfig"
  1001. endmenu
  1002. source "fs/Kconfig"
  1003. source "arch/arm/Kconfig.debug"
  1004. source "security/Kconfig"
  1005. source "crypto/Kconfig"
  1006. source "lib/Kconfig"