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_IDE
  10. select RTC_LIB
  11. select SYS_SUPPORTS_APM_EMULATION
  12. select HAVE_OPROFILE
  13. select HAVE_ARCH_KGDB
  14. select HAVE_KPROBES if (!XIP_KERNEL)
  15. select HAVE_KRETPROBES if (HAVE_KPROBES)
  16. select HAVE_FTRACE if (!XIP_KERNEL)
  17. select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
  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_SUPPORTS_AOUT
  113. def_bool y
  114. config ARCH_MAY_HAVE_PC_FDC
  115. bool
  116. config ZONE_DMA
  117. bool
  118. default y
  119. config GENERIC_ISA_DMA
  120. bool
  121. config FIQ
  122. bool
  123. config ARCH_MTD_XIP
  124. bool
  125. config GENERIC_HARDIRQS_NO__DO_IRQ
  126. bool
  127. def_bool y
  128. if OPROFILE
  129. config OPROFILE_ARMV6
  130. def_bool y
  131. depends on CPU_V6 && !SMP
  132. select OPROFILE_ARM11_CORE
  133. config OPROFILE_MPCORE
  134. def_bool y
  135. depends on CPU_V6 && SMP
  136. select OPROFILE_ARM11_CORE
  137. config OPROFILE_ARM11_CORE
  138. bool
  139. config OPROFILE_ARMV7
  140. def_bool y
  141. depends on CPU_V7 && !SMP
  142. bool
  143. endif
  144. config VECTORS_BASE
  145. hex
  146. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  147. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  148. default 0x00000000
  149. help
  150. The base address of exception vectors.
  151. source "init/Kconfig"
  152. menu "System Type"
  153. choice
  154. prompt "ARM system type"
  155. default ARCH_VERSATILE
  156. config ARCH_AAEC2000
  157. bool "Agilent AAEC-2000 based"
  158. select ARM_AMBA
  159. select HAVE_CLK
  160. help
  161. This enables support for systems based on the Agilent AAEC-2000
  162. config ARCH_INTEGRATOR
  163. bool "ARM Ltd. Integrator family"
  164. select ARM_AMBA
  165. select HAVE_CLK
  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 ICST307
  174. select GENERIC_TIME
  175. select GENERIC_CLOCKEVENTS
  176. help
  177. This enables support for ARM Ltd RealView boards.
  178. config ARCH_VERSATILE
  179. bool "ARM Ltd. Versatile family"
  180. select ARM_AMBA
  181. select ARM_VIC
  182. select HAVE_CLK
  183. select ICST307
  184. select GENERIC_TIME
  185. select GENERIC_CLOCKEVENTS
  186. help
  187. This enables support for ARM Ltd Versatile board.
  188. config ARCH_AT91
  189. bool "Atmel AT91"
  190. select GENERIC_GPIO
  191. select HAVE_CLK
  192. help
  193. This enables support for systems based on the Atmel AT91RM9200,
  194. AT91SAM9 and AT91CAP9 processors.
  195. config ARCH_CLPS7500
  196. bool "Cirrus CL-PS7500FE"
  197. select TIMER_ACORN
  198. select ISA
  199. select NO_IOPORT
  200. help
  201. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  202. config ARCH_CLPS711X
  203. bool "Cirrus Logic CLPS711x/EP721x-based"
  204. help
  205. Support for Cirrus Logic 711x/721x based boards.
  206. config ARCH_EBSA110
  207. bool "EBSA-110"
  208. select ISA
  209. select NO_IOPORT
  210. help
  211. This is an evaluation board for the StrongARM processor available
  212. from Digital. It has limited hardware on-board, including an
  213. Ethernet interface, two PCMCIA sockets, two serial ports and a
  214. parallel port.
  215. config ARCH_EP93XX
  216. bool "EP93xx-based"
  217. select ARM_AMBA
  218. select ARM_VIC
  219. select GENERIC_GPIO
  220. select HAVE_CLK
  221. select ARCH_REQUIRE_GPIOLIB
  222. help
  223. This enables support for the Cirrus EP93xx series of CPUs.
  224. config ARCH_FOOTBRIDGE
  225. bool "FootBridge"
  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 ARM_VIC
  233. help
  234. This enables support for systems based on the Hilscher NetX Soc
  235. config ARCH_H720X
  236. bool "Hynix HMS720x-based"
  237. select ISA_DMA_API
  238. help
  239. This enables support for systems based on the Hynix HMS720x
  240. config ARCH_IMX
  241. bool "IMX"
  242. select GENERIC_GPIO
  243. select GENERIC_TIME
  244. select GENERIC_CLOCKEVENTS
  245. help
  246. Support for Motorola's i.MX family of processors (MX1, MXL).
  247. config ARCH_IOP13XX
  248. bool "IOP13xx-based"
  249. depends on MMU
  250. select PLAT_IOP
  251. select PCI
  252. select ARCH_SUPPORTS_MSI
  253. help
  254. Support for Intel's IOP13XX (XScale) family of processors.
  255. config ARCH_IOP32X
  256. bool "IOP32x-based"
  257. depends on MMU
  258. select PLAT_IOP
  259. select PCI
  260. select GENERIC_GPIO
  261. select ARCH_REQUIRE_GPIOLIB
  262. help
  263. Support for Intel's 80219 and IOP32X (XScale) family of
  264. processors.
  265. config ARCH_IOP33X
  266. bool "IOP33x-based"
  267. depends on MMU
  268. select PLAT_IOP
  269. select PCI
  270. select GENERIC_GPIO
  271. select ARCH_REQUIRE_GPIOLIB
  272. help
  273. Support for Intel's IOP33X (XScale) family of processors.
  274. config ARCH_IXP23XX
  275. bool "IXP23XX-based"
  276. depends on MMU
  277. select PCI
  278. help
  279. Support for Intel's IXP23xx (XScale) family of processors.
  280. config ARCH_IXP2000
  281. bool "IXP2400/2800-based"
  282. depends on MMU
  283. select PCI
  284. help
  285. Support for Intel's IXP2400/2800 (XScale) family of processors.
  286. config ARCH_IXP4XX
  287. bool "IXP4xx-based"
  288. depends on MMU
  289. select GENERIC_GPIO
  290. select GENERIC_TIME
  291. select GENERIC_CLOCKEVENTS
  292. help
  293. Support for Intel's IXP4XX (XScale) family of processors.
  294. config ARCH_L7200
  295. bool "LinkUp-L7200"
  296. select FIQ
  297. help
  298. Say Y here if you intend to run this kernel on a LinkUp Systems
  299. L7200 Software Development Board which uses an ARM720T processor.
  300. Information on this board can be obtained at:
  301. <http://www.linkupsys.com/>
  302. If you have any questions or comments about the Linux kernel port
  303. to this board, send e-mail to <sjhill@cotw.com>.
  304. config ARCH_KIRKWOOD
  305. bool "Marvell Kirkwood"
  306. select PCI
  307. select GENERIC_TIME
  308. select GENERIC_CLOCKEVENTS
  309. select PLAT_ORION
  310. help
  311. Support for the following Marvell Kirkwood series SoCs:
  312. 88F6180, 88F6192 and 88F6281.
  313. config ARCH_KS8695
  314. bool "Micrel/Kendin KS8695"
  315. select GENERIC_GPIO
  316. help
  317. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  318. System-on-Chip devices.
  319. config ARCH_NS9XXX
  320. bool "NetSilicon NS9xxx"
  321. select GENERIC_GPIO
  322. select GENERIC_TIME
  323. select GENERIC_CLOCKEVENTS
  324. select HAVE_CLK
  325. help
  326. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  327. System.
  328. <http://www.digi.com/products/microprocessors/index.jsp>
  329. config ARCH_LOKI
  330. bool "Marvell Loki (88RC8480)"
  331. select GENERIC_TIME
  332. select GENERIC_CLOCKEVENTS
  333. select PLAT_ORION
  334. help
  335. Support for the Marvell Loki (88RC8480) SoC.
  336. config ARCH_MV78XX0
  337. bool "Marvell MV78xx0"
  338. select PCI
  339. select GENERIC_TIME
  340. select GENERIC_CLOCKEVENTS
  341. select PLAT_ORION
  342. help
  343. Support for the following Marvell MV78xx0 series SoCs:
  344. MV781x0, MV782x0.
  345. config ARCH_MXC
  346. bool "Freescale MXC/iMX-based"
  347. select GENERIC_TIME
  348. select GENERIC_CLOCKEVENTS
  349. select ARCH_MTD_XIP
  350. select GENERIC_GPIO
  351. select ARCH_REQUIRE_GPIOLIB
  352. help
  353. Support for Freescale MXC/iMX-based family of processors
  354. config ARCH_ORION5X
  355. bool "Marvell Orion"
  356. depends on MMU
  357. select PCI
  358. select GENERIC_GPIO
  359. select GENERIC_TIME
  360. select GENERIC_CLOCKEVENTS
  361. select PLAT_ORION
  362. help
  363. Support for the following Marvell Orion 5x series SoCs:
  364. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  365. Orion-2 (5281).
  366. config ARCH_PNX4008
  367. bool "Philips Nexperia PNX4008 Mobile"
  368. select HAVE_CLK
  369. help
  370. This enables support for Philips PNX4008 mobile platform.
  371. config ARCH_PXA
  372. bool "PXA2xx/PXA3xx-based"
  373. depends on MMU
  374. select ARCH_MTD_XIP
  375. select GENERIC_GPIO
  376. select HAVE_CLK
  377. select ARCH_REQUIRE_GPIOLIB
  378. select GENERIC_TIME
  379. select GENERIC_CLOCKEVENTS
  380. select TICK_ONESHOT
  381. help
  382. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  383. config ARCH_RPC
  384. bool "RiscPC"
  385. select ARCH_ACORN
  386. select FIQ
  387. select TIMER_ACORN
  388. select ARCH_MAY_HAVE_PC_FDC
  389. select HAVE_PATA_PLATFORM
  390. select ISA_DMA_API
  391. select NO_IOPORT
  392. help
  393. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  394. CD-ROM interface, serial and parallel port, and the floppy drive.
  395. config ARCH_SA1100
  396. bool "SA1100-based"
  397. select ISA
  398. select ARCH_DISCONTIGMEM_ENABLE
  399. select ARCH_SPARSEMEM_ENABLE
  400. select ARCH_SELECT_MEMORY_MODEL
  401. select ARCH_MTD_XIP
  402. select GENERIC_GPIO
  403. select GENERIC_TIME
  404. select GENERIC_CLOCKEVENTS
  405. select HAVE_CLK
  406. select TICK_ONESHOT
  407. select ARCH_REQUIRE_GPIOLIB
  408. help
  409. Support for StrongARM 11x0 based boards.
  410. config ARCH_S3C2410
  411. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  412. select GENERIC_GPIO
  413. select HAVE_CLK
  414. help
  415. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  416. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  417. the Samsung SMDK2410 development board (and derivatives).
  418. config ARCH_SHARK
  419. bool "Shark"
  420. select ISA
  421. select ISA_DMA
  422. select PCI
  423. help
  424. Support for the StrongARM based Digital DNARD machine, also known
  425. as "Shark" (<http://www.shark-linux.de/shark.html>).
  426. config ARCH_LH7A40X
  427. bool "Sharp LH7A40X"
  428. help
  429. Say Y here for systems based on one of the Sharp LH7A40X
  430. System on a Chip processors. These CPUs include an ARM922T
  431. core with a wide array of integrated devices for
  432. hand-held and low-power applications.
  433. config ARCH_DAVINCI
  434. bool "TI DaVinci"
  435. select GENERIC_TIME
  436. select GENERIC_CLOCKEVENTS
  437. select GENERIC_GPIO
  438. select HAVE_CLK
  439. help
  440. Support for TI's DaVinci platform.
  441. config ARCH_OMAP
  442. bool "TI OMAP"
  443. select GENERIC_GPIO
  444. select HAVE_CLK
  445. select ARCH_REQUIRE_GPIOLIB
  446. select GENERIC_TIME
  447. select GENERIC_CLOCKEVENTS
  448. help
  449. Support for TI's OMAP platform (OMAP1 and OMAP2).
  450. config ARCH_MSM7X00A
  451. bool "Qualcomm MSM7X00A"
  452. select GENERIC_TIME
  453. select GENERIC_CLOCKEVENTS
  454. help
  455. Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
  456. apps processor of the MSM7X00A and depends on a shared memory
  457. interface to the ARM9 modem processor which runs the baseband stack
  458. and controls some vital subsystems (clock and power control, etc).
  459. <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
  460. endchoice
  461. source "arch/arm/mach-clps711x/Kconfig"
  462. source "arch/arm/mach-ep93xx/Kconfig"
  463. source "arch/arm/mach-footbridge/Kconfig"
  464. source "arch/arm/mach-integrator/Kconfig"
  465. source "arch/arm/mach-iop32x/Kconfig"
  466. source "arch/arm/mach-iop33x/Kconfig"
  467. source "arch/arm/mach-iop13xx/Kconfig"
  468. source "arch/arm/mach-ixp4xx/Kconfig"
  469. source "arch/arm/mach-ixp2000/Kconfig"
  470. source "arch/arm/mach-ixp23xx/Kconfig"
  471. source "arch/arm/mach-loki/Kconfig"
  472. source "arch/arm/mach-mv78xx0/Kconfig"
  473. source "arch/arm/mach-pxa/Kconfig"
  474. source "arch/arm/mach-sa1100/Kconfig"
  475. source "arch/arm/plat-omap/Kconfig"
  476. source "arch/arm/mach-omap1/Kconfig"
  477. source "arch/arm/mach-omap2/Kconfig"
  478. source "arch/arm/mach-orion5x/Kconfig"
  479. source "arch/arm/mach-kirkwood/Kconfig"
  480. source "arch/arm/plat-s3c24xx/Kconfig"
  481. source "arch/arm/plat-s3c/Kconfig"
  482. if ARCH_S3C2410
  483. source "arch/arm/mach-s3c2400/Kconfig"
  484. source "arch/arm/mach-s3c2410/Kconfig"
  485. source "arch/arm/mach-s3c2412/Kconfig"
  486. source "arch/arm/mach-s3c2440/Kconfig"
  487. source "arch/arm/mach-s3c2442/Kconfig"
  488. source "arch/arm/mach-s3c2443/Kconfig"
  489. endif
  490. source "arch/arm/mach-lh7a40x/Kconfig"
  491. source "arch/arm/mach-imx/Kconfig"
  492. source "arch/arm/mach-h720x/Kconfig"
  493. source "arch/arm/mach-versatile/Kconfig"
  494. source "arch/arm/mach-aaec2000/Kconfig"
  495. source "arch/arm/mach-realview/Kconfig"
  496. source "arch/arm/mach-at91/Kconfig"
  497. source "arch/arm/plat-mxc/Kconfig"
  498. source "arch/arm/mach-netx/Kconfig"
  499. source "arch/arm/mach-ns9xxx/Kconfig"
  500. source "arch/arm/mach-davinci/Kconfig"
  501. source "arch/arm/mach-ks8695/Kconfig"
  502. source "arch/arm/mach-msm/Kconfig"
  503. # Definitions to make life easier
  504. config ARCH_ACORN
  505. bool
  506. config PLAT_IOP
  507. bool
  508. config PLAT_ORION
  509. bool
  510. source arch/arm/mm/Kconfig
  511. config IWMMXT
  512. bool "Enable iWMMXt support"
  513. depends on CPU_XSCALE || CPU_XSC3
  514. default y if PXA27x || PXA3xx
  515. help
  516. Enable support for iWMMXt context switching at run time if
  517. running on a CPU that supports it.
  518. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  519. config XSCALE_PMU
  520. bool
  521. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  522. default y
  523. if !MMU
  524. source "arch/arm/Kconfig-nommu"
  525. endif
  526. endmenu
  527. source "arch/arm/common/Kconfig"
  528. config FORCE_MAX_ZONEORDER
  529. int
  530. depends on SA1111
  531. default "9"
  532. menu "Bus support"
  533. config ARM_AMBA
  534. bool
  535. config ISA
  536. bool
  537. help
  538. Find out whether you have ISA slots on your motherboard. ISA is the
  539. name of a bus system, i.e. the way the CPU talks to the other stuff
  540. inside your box. Other bus systems are PCI, EISA, MicroChannel
  541. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  542. newer boards don't support it. If you have ISA, say Y, otherwise N.
  543. # Select ISA DMA controller support
  544. config ISA_DMA
  545. bool
  546. select ISA_DMA_API
  547. # Select ISA DMA interface
  548. config ISA_DMA_API
  549. bool
  550. config PCI
  551. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  552. help
  553. Find out whether you have a PCI motherboard. PCI is the name of a
  554. bus system, i.e. the way the CPU talks to the other stuff inside
  555. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  556. VESA. If you have PCI, say Y, otherwise N.
  557. config PCI_SYSCALL
  558. def_bool PCI
  559. # Select the host bridge type
  560. config PCI_HOST_VIA82C505
  561. bool
  562. depends on PCI && ARCH_SHARK
  563. default y
  564. config PCI_HOST_ITE8152
  565. bool
  566. depends on PCI && MACH_ARMCORE
  567. default y
  568. select DMABOUNCE
  569. source "drivers/pci/Kconfig"
  570. source "drivers/pcmcia/Kconfig"
  571. endmenu
  572. menu "Kernel Features"
  573. source "kernel/time/Kconfig"
  574. config SMP
  575. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  576. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  577. select USE_GENERIC_SMP_HELPERS
  578. help
  579. This enables support for systems with more than one CPU. If you have
  580. a system with only one CPU, like most personal computers, say N. If
  581. you have a system with more than one CPU, say Y.
  582. If you say N here, the kernel will run on single and multiprocessor
  583. machines, but will use only one CPU of a multiprocessor machine. If
  584. you say Y here, the kernel will run on many, but not all, single
  585. processor machines. On a single processor machine, the kernel will
  586. run faster if you say N here.
  587. See also <file:Documentation/i386/IO-APIC.txt>,
  588. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  589. <http://www.linuxdoc.org/docs.html#howto>.
  590. If you don't know what to do here, say N.
  591. config NR_CPUS
  592. int "Maximum number of CPUs (2-32)"
  593. range 2 32
  594. depends on SMP
  595. default "4"
  596. config HOTPLUG_CPU
  597. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  598. depends on SMP && HOTPLUG && EXPERIMENTAL
  599. help
  600. Say Y here to experiment with turning CPUs off and on. CPUs
  601. can be controlled through /sys/devices/system/cpu.
  602. config LOCAL_TIMERS
  603. bool "Use local timer interrupts"
  604. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  605. default y
  606. help
  607. Enable support for local timers on SMP platforms, rather then the
  608. legacy IPI broadcast method. Local timers allows the system
  609. accounting to be spread across the timer interval, preventing a
  610. "thundering herd" at every timer tick.
  611. config PREEMPT
  612. bool "Preemptible Kernel (EXPERIMENTAL)"
  613. depends on EXPERIMENTAL
  614. help
  615. This option reduces the latency of the kernel when reacting to
  616. real-time or interactive events by allowing a low priority process to
  617. be preempted even if it is in kernel mode executing a system call.
  618. This allows applications to run more reliably even when the system is
  619. under load.
  620. Say Y here if you are building a kernel for a desktop, embedded
  621. or real-time system. Say N if you are unsure.
  622. config HZ
  623. int
  624. default 128 if ARCH_L7200
  625. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  626. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  627. default AT91_TIMER_HZ if ARCH_AT91
  628. default 100
  629. config AEABI
  630. bool "Use the ARM EABI to compile the kernel"
  631. help
  632. This option allows for the kernel to be compiled using the latest
  633. ARM ABI (aka EABI). This is only useful if you are using a user
  634. space environment that is also compiled with EABI.
  635. Since there are major incompatibilities between the legacy ABI and
  636. EABI, especially with regard to structure member alignment, this
  637. option also changes the kernel syscall calling convention to
  638. disambiguate both ABIs and allow for backward compatibility support
  639. (selected with CONFIG_OABI_COMPAT).
  640. To use this you need GCC version 4.0.0 or later.
  641. config OABI_COMPAT
  642. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  643. depends on AEABI && EXPERIMENTAL
  644. default y
  645. help
  646. This option preserves the old syscall interface along with the
  647. new (ARM EABI) one. It also provides a compatibility layer to
  648. intercept syscalls that have structure arguments which layout
  649. in memory differs between the legacy ABI and the new ARM EABI
  650. (only for non "thumb" binaries). This option adds a tiny
  651. overhead to all syscalls and produces a slightly larger kernel.
  652. If you know you'll be using only pure EABI user space then you
  653. can say N here. If this option is not selected and you attempt
  654. to execute a legacy ABI binary then the result will be
  655. UNPREDICTABLE (in fact it can be predicted that it won't work
  656. at all). If in doubt say Y.
  657. config ARCH_DISCONTIGMEM_ENABLE
  658. bool
  659. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  660. help
  661. Say Y to support efficient handling of discontiguous physical memory,
  662. for architectures which are either NUMA (Non-Uniform Memory Access)
  663. or have huge holes in the physical address space for other reasons.
  664. See <file:Documentation/vm/numa> for more.
  665. config ARCH_SPARSEMEM_ENABLE
  666. bool
  667. config ARCH_SELECT_MEMORY_MODEL
  668. bool
  669. config NODES_SHIFT
  670. int
  671. default "4" if ARCH_LH7A40X
  672. default "2"
  673. depends on NEED_MULTIPLE_NODES
  674. source "mm/Kconfig"
  675. config LEDS
  676. bool "Timer and CPU usage LEDs"
  677. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  678. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  679. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  680. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  681. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  682. ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
  683. ARCH_KS8695 || MACH_RD88F5182
  684. help
  685. If you say Y here, the LEDs on your machine will be used
  686. to provide useful information about your current system status.
  687. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  688. be able to select which LEDs are active using the options below. If
  689. you are compiling a kernel for the EBSA-110 or the LART however, the
  690. red LED will simply flash regularly to indicate that the system is
  691. still functional. It is safe to say Y here if you have a CATS
  692. system, but the driver will do nothing.
  693. config LEDS_TIMER
  694. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  695. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  696. || MACH_OMAP_PERSEUS2
  697. depends on LEDS
  698. depends on !GENERIC_CLOCKEVENTS
  699. default y if ARCH_EBSA110
  700. help
  701. If you say Y here, one of the system LEDs (the green one on the
  702. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  703. will flash regularly to indicate that the system is still
  704. operational. This is mainly useful to kernel hackers who are
  705. debugging unstable kernels.
  706. The LART uses the same LED for both Timer LED and CPU usage LED
  707. functions. You may choose to use both, but the Timer LED function
  708. will overrule the CPU usage LED.
  709. config LEDS_CPU
  710. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  711. !ARCH_OMAP) \
  712. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  713. || MACH_OMAP_PERSEUS2
  714. depends on LEDS
  715. help
  716. If you say Y here, the red LED will be used to give a good real
  717. time indication of CPU usage, by lighting whenever the idle task
  718. is not currently executing.
  719. The LART uses the same LED for both Timer LED and CPU usage LED
  720. functions. You may choose to use both, but the Timer LED function
  721. will overrule the CPU usage LED.
  722. config ALIGNMENT_TRAP
  723. bool
  724. depends on CPU_CP15_MMU
  725. default y if !ARCH_EBSA110
  726. help
  727. ARM processors cannot fetch/store information which is not
  728. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  729. address divisible by 4. On 32-bit ARM processors, these non-aligned
  730. fetch/store instructions will be emulated in software if you say
  731. here, which has a severe performance impact. This is necessary for
  732. correct operation of some network protocols. With an IP-only
  733. configuration it is safe to say N, otherwise say Y.
  734. endmenu
  735. menu "Boot options"
  736. # Compressed boot loader in ROM. Yes, we really want to ask about
  737. # TEXT and BSS so we preserve their values in the config files.
  738. config ZBOOT_ROM_TEXT
  739. hex "Compressed ROM boot loader base address"
  740. default "0"
  741. help
  742. The physical address at which the ROM-able zImage is to be
  743. placed in the target. Platforms which normally make use of
  744. ROM-able zImage formats normally set this to a suitable
  745. value in their defconfig file.
  746. If ZBOOT_ROM is not enabled, this has no effect.
  747. config ZBOOT_ROM_BSS
  748. hex "Compressed ROM boot loader BSS address"
  749. default "0"
  750. help
  751. The base address of an area of read/write memory in the target
  752. for the ROM-able zImage which must be available while the
  753. decompressor is running. It must be large enough to hold the
  754. entire decompressed kernel plus an additional 128 KiB.
  755. Platforms which normally make use of ROM-able zImage formats
  756. normally set this to a suitable value in their defconfig file.
  757. If ZBOOT_ROM is not enabled, this has no effect.
  758. config ZBOOT_ROM
  759. bool "Compressed boot loader in ROM/flash"
  760. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  761. help
  762. Say Y here if you intend to execute your compressed kernel image
  763. (zImage) directly from ROM or flash. If unsure, say N.
  764. config CMDLINE
  765. string "Default kernel command string"
  766. default ""
  767. help
  768. On some architectures (EBSA110 and CATS), there is currently no way
  769. for the boot loader to pass arguments to the kernel. For these
  770. architectures, you should supply some command-line options at build
  771. time by entering them here. As a minimum, you should specify the
  772. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  773. config XIP_KERNEL
  774. bool "Kernel Execute-In-Place from ROM"
  775. depends on !ZBOOT_ROM
  776. help
  777. Execute-In-Place allows the kernel to run from non-volatile storage
  778. directly addressable by the CPU, such as NOR flash. This saves RAM
  779. space since the text section of the kernel is not loaded from flash
  780. to RAM. Read-write sections, such as the data section and stack,
  781. are still copied to RAM. The XIP kernel is not compressed since
  782. it has to run directly from flash, so it will take more space to
  783. store it. The flash address used to link the kernel object files,
  784. and for storing it, is configuration dependent. Therefore, if you
  785. say Y here, you must know the proper physical address where to
  786. store the kernel image depending on your own flash memory usage.
  787. Also note that the make target becomes "make xipImage" rather than
  788. "make zImage" or "make Image". The final kernel binary to put in
  789. ROM memory will be arch/arm/boot/xipImage.
  790. If unsure, say N.
  791. config XIP_PHYS_ADDR
  792. hex "XIP Kernel Physical Location"
  793. depends on XIP_KERNEL
  794. default "0x00080000"
  795. help
  796. This is the physical address in your flash memory the kernel will
  797. be linked for and stored to. This address is dependent on your
  798. own flash usage.
  799. config KEXEC
  800. bool "Kexec system call (EXPERIMENTAL)"
  801. depends on EXPERIMENTAL
  802. help
  803. kexec is a system call that implements the ability to shutdown your
  804. current kernel, and to start another kernel. It is like a reboot
  805. but it is independent of the system firmware. And like a reboot
  806. you can start any kernel with it, not just Linux.
  807. It is an ongoing process to be certain the hardware in a machine
  808. is properly shutdown, so do not be surprised if this code does not
  809. initially work for you. It may help to enable device hotplugging
  810. support.
  811. config ATAGS_PROC
  812. bool "Export atags in procfs"
  813. depends on KEXEC
  814. default y
  815. help
  816. Should the atags used to boot the kernel be exported in an "atags"
  817. file in procfs. Useful with kexec.
  818. endmenu
  819. menu "CPU Power Management"
  820. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
  821. source "drivers/cpufreq/Kconfig"
  822. config CPU_FREQ_SA1100
  823. bool
  824. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  825. default y
  826. config CPU_FREQ_SA1110
  827. bool
  828. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  829. default y
  830. config CPU_FREQ_INTEGRATOR
  831. tristate "CPUfreq driver for ARM Integrator CPUs"
  832. depends on ARCH_INTEGRATOR && CPU_FREQ
  833. default y
  834. help
  835. This enables the CPUfreq driver for ARM Integrator CPUs.
  836. For details, take a look at <file:Documentation/cpu-freq>.
  837. If in doubt, say Y.
  838. config CPU_FREQ_IMX
  839. tristate "CPUfreq driver for i.MX CPUs"
  840. depends on ARCH_IMX && CPU_FREQ
  841. default n
  842. help
  843. This enables the CPUfreq driver for i.MX CPUs.
  844. If in doubt, say N.
  845. config CPU_FREQ_PXA
  846. bool
  847. depends on CPU_FREQ && ARCH_PXA && PXA25x
  848. default y
  849. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  850. endif
  851. source "drivers/cpuidle/Kconfig"
  852. endmenu
  853. menu "Floating point emulation"
  854. comment "At least one emulation must be selected"
  855. config FPE_NWFPE
  856. bool "NWFPE math emulation"
  857. depends on !AEABI || OABI_COMPAT
  858. ---help---
  859. Say Y to include the NWFPE floating point emulator in the kernel.
  860. This is necessary to run most binaries. Linux does not currently
  861. support floating point hardware so you need to say Y here even if
  862. your machine has an FPA or floating point co-processor podule.
  863. You may say N here if you are going to load the Acorn FPEmulator
  864. early in the bootup.
  865. config FPE_NWFPE_XP
  866. bool "Support extended precision"
  867. depends on FPE_NWFPE
  868. help
  869. Say Y to include 80-bit support in the kernel floating-point
  870. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  871. Note that gcc does not generate 80-bit operations by default,
  872. so in most cases this option only enlarges the size of the
  873. floating point emulator without any good reason.
  874. You almost surely want to say N here.
  875. config FPE_FASTFPE
  876. bool "FastFPE math emulation (EXPERIMENTAL)"
  877. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  878. ---help---
  879. Say Y here to include the FAST floating point emulator in the kernel.
  880. This is an experimental much faster emulator which now also has full
  881. precision for the mantissa. It does not support any exceptions.
  882. It is very simple, and approximately 3-6 times faster than NWFPE.
  883. It should be sufficient for most programs. It may be not suitable
  884. for scientific calculations, but you have to check this for yourself.
  885. If you do not feel you need a faster FP emulation you should better
  886. choose NWFPE.
  887. config VFP
  888. bool "VFP-format floating point maths"
  889. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  890. help
  891. Say Y to include VFP support code in the kernel. This is needed
  892. if your hardware includes a VFP unit.
  893. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  894. release notes and additional status information.
  895. Say N if your target does not have VFP hardware.
  896. config VFPv3
  897. bool
  898. depends on VFP
  899. default y if CPU_V7
  900. config NEON
  901. bool "Advanced SIMD (NEON) Extension support"
  902. depends on VFPv3 && CPU_V7
  903. help
  904. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  905. Extension.
  906. endmenu
  907. menu "Userspace binary formats"
  908. source "fs/Kconfig.binfmt"
  909. config ARTHUR
  910. tristate "RISC OS personality"
  911. depends on !AEABI
  912. help
  913. Say Y here to include the kernel code necessary if you want to run
  914. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  915. experimental; if this sounds frightening, say N and sleep in peace.
  916. You can also say M here to compile this support as a module (which
  917. will be called arthur).
  918. endmenu
  919. menu "Power management options"
  920. source "kernel/power/Kconfig"
  921. config ARCH_SUSPEND_POSSIBLE
  922. def_bool y
  923. endmenu
  924. source "net/Kconfig"
  925. menu "Device Drivers"
  926. source "drivers/base/Kconfig"
  927. source "drivers/connector/Kconfig"
  928. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  929. source "drivers/mtd/Kconfig"
  930. endif
  931. source "drivers/parport/Kconfig"
  932. source "drivers/pnp/Kconfig"
  933. source "drivers/block/Kconfig"
  934. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  935. source "drivers/misc/Kconfig"
  936. source "drivers/ide/Kconfig"
  937. source "drivers/scsi/Kconfig"
  938. source "drivers/ata/Kconfig"
  939. source "drivers/md/Kconfig"
  940. source "drivers/message/fusion/Kconfig"
  941. source "drivers/ieee1394/Kconfig"
  942. source "drivers/message/i2o/Kconfig"
  943. source "drivers/net/Kconfig"
  944. source "drivers/isdn/Kconfig"
  945. # input before char - char/joystick depends on it. As does USB.
  946. source "drivers/input/Kconfig"
  947. source "drivers/char/Kconfig"
  948. source "drivers/i2c/Kconfig"
  949. source "drivers/spi/Kconfig"
  950. source "drivers/gpio/Kconfig"
  951. source "drivers/w1/Kconfig"
  952. source "drivers/power/Kconfig"
  953. source "drivers/hwmon/Kconfig"
  954. source "drivers/thermal/Kconfig"
  955. source "drivers/watchdog/Kconfig"
  956. source "drivers/ssb/Kconfig"
  957. #source "drivers/l3/Kconfig"
  958. source "drivers/mfd/Kconfig"
  959. source "drivers/media/Kconfig"
  960. source "drivers/video/Kconfig"
  961. source "sound/Kconfig"
  962. source "drivers/hid/Kconfig"
  963. source "drivers/usb/Kconfig"
  964. source "drivers/mmc/Kconfig"
  965. source "drivers/memstick/Kconfig"
  966. source "drivers/accessibility/Kconfig"
  967. source "drivers/leds/Kconfig"
  968. source "drivers/rtc/Kconfig"
  969. source "drivers/dma/Kconfig"
  970. source "drivers/dca/Kconfig"
  971. source "drivers/auxdisplay/Kconfig"
  972. source "drivers/regulator/Kconfig"
  973. source "drivers/uio/Kconfig"
  974. endmenu
  975. source "fs/Kconfig"
  976. source "arch/arm/Kconfig.debug"
  977. source "security/Kconfig"
  978. source "crypto/Kconfig"
  979. source "lib/Kconfig"