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_MAY_HAVE_PC_FDC
  113. bool
  114. config ZONE_DMA
  115. bool
  116. default y
  117. config GENERIC_ISA_DMA
  118. bool
  119. config FIQ
  120. bool
  121. config ARCH_MTD_XIP
  122. bool
  123. config GENERIC_HARDIRQS_NO__DO_IRQ
  124. bool
  125. def_bool y
  126. if OPROFILE
  127. config OPROFILE_ARMV6
  128. def_bool y
  129. depends on CPU_V6 && !SMP
  130. select OPROFILE_ARM11_CORE
  131. config OPROFILE_MPCORE
  132. def_bool y
  133. depends on CPU_V6 && SMP
  134. select OPROFILE_ARM11_CORE
  135. config OPROFILE_ARM11_CORE
  136. bool
  137. endif
  138. config VECTORS_BASE
  139. hex
  140. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  141. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  142. default 0x00000000
  143. help
  144. The base address of exception vectors.
  145. source "init/Kconfig"
  146. menu "System Type"
  147. choice
  148. prompt "ARM system type"
  149. default ARCH_VERSATILE
  150. config ARCH_AAEC2000
  151. bool "Agilent AAEC-2000 based"
  152. select ARM_AMBA
  153. select HAVE_CLK
  154. help
  155. This enables support for systems based on the Agilent AAEC-2000
  156. config ARCH_INTEGRATOR
  157. bool "ARM Ltd. Integrator family"
  158. select ARM_AMBA
  159. select HAVE_CLK
  160. select ICST525
  161. help
  162. Support for ARM's Integrator platform.
  163. config ARCH_REALVIEW
  164. bool "ARM Ltd. RealView family"
  165. select ARM_AMBA
  166. select HAVE_CLK
  167. select ICST307
  168. select GENERIC_TIME
  169. select GENERIC_CLOCKEVENTS
  170. help
  171. This enables support for ARM Ltd RealView boards.
  172. config ARCH_VERSATILE
  173. bool "ARM Ltd. Versatile family"
  174. select ARM_AMBA
  175. select ARM_VIC
  176. select HAVE_CLK
  177. select ICST307
  178. select GENERIC_TIME
  179. select GENERIC_CLOCKEVENTS
  180. help
  181. This enables support for ARM Ltd Versatile board.
  182. config ARCH_AT91
  183. bool "Atmel AT91"
  184. select GENERIC_GPIO
  185. select HAVE_CLK
  186. help
  187. This enables support for systems based on the Atmel AT91RM9200,
  188. AT91SAM9 and AT91CAP9 processors.
  189. config ARCH_CLPS7500
  190. bool "Cirrus CL-PS7500FE"
  191. select TIMER_ACORN
  192. select ISA
  193. select NO_IOPORT
  194. help
  195. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  196. config ARCH_CLPS711X
  197. bool "Cirrus Logic CLPS711x/EP721x-based"
  198. help
  199. Support for Cirrus Logic 711x/721x based boards.
  200. config ARCH_EBSA110
  201. bool "EBSA-110"
  202. select ISA
  203. select NO_IOPORT
  204. help
  205. This is an evaluation board for the StrongARM processor available
  206. from Digital. It has limited hardware on-board, including an
  207. Ethernet interface, two PCMCIA sockets, two serial ports and a
  208. parallel port.
  209. config ARCH_EP93XX
  210. bool "EP93xx-based"
  211. select ARM_AMBA
  212. select ARM_VIC
  213. select GENERIC_GPIO
  214. select HAVE_CLK
  215. select ARCH_REQUIRE_GPIOLIB
  216. help
  217. This enables support for the Cirrus EP93xx series of CPUs.
  218. config ARCH_FOOTBRIDGE
  219. bool "FootBridge"
  220. select FOOTBRIDGE
  221. help
  222. Support for systems based on the DC21285 companion chip
  223. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  224. config ARCH_NETX
  225. bool "Hilscher NetX based"
  226. select ARM_VIC
  227. help
  228. This enables support for systems based on the Hilscher NetX Soc
  229. config ARCH_H720X
  230. bool "Hynix HMS720x-based"
  231. select ISA_DMA_API
  232. help
  233. This enables support for systems based on the Hynix HMS720x
  234. config ARCH_IMX
  235. bool "IMX"
  236. select GENERIC_GPIO
  237. select GENERIC_TIME
  238. select GENERIC_CLOCKEVENTS
  239. help
  240. Support for Motorola's i.MX family of processors (MX1, MXL).
  241. config ARCH_IOP13XX
  242. bool "IOP13xx-based"
  243. depends on MMU
  244. select PLAT_IOP
  245. select PCI
  246. select ARCH_SUPPORTS_MSI
  247. help
  248. Support for Intel's IOP13XX (XScale) family of processors.
  249. config ARCH_IOP32X
  250. bool "IOP32x-based"
  251. depends on MMU
  252. select PLAT_IOP
  253. select PCI
  254. select GENERIC_GPIO
  255. select ARCH_REQUIRE_GPIOLIB
  256. help
  257. Support for Intel's 80219 and IOP32X (XScale) family of
  258. processors.
  259. config ARCH_IOP33X
  260. bool "IOP33x-based"
  261. depends on MMU
  262. select PLAT_IOP
  263. select PCI
  264. select GENERIC_GPIO
  265. select ARCH_REQUIRE_GPIOLIB
  266. help
  267. Support for Intel's IOP33X (XScale) family of processors.
  268. config ARCH_IXP23XX
  269. bool "IXP23XX-based"
  270. depends on MMU
  271. select PCI
  272. help
  273. Support for Intel's IXP23xx (XScale) family of processors.
  274. config ARCH_IXP2000
  275. bool "IXP2400/2800-based"
  276. depends on MMU
  277. select PCI
  278. help
  279. Support for Intel's IXP2400/2800 (XScale) family of processors.
  280. config ARCH_IXP4XX
  281. bool "IXP4xx-based"
  282. depends on MMU
  283. select GENERIC_GPIO
  284. select GENERIC_TIME
  285. select GENERIC_CLOCKEVENTS
  286. help
  287. Support for Intel's IXP4XX (XScale) family of processors.
  288. config ARCH_L7200
  289. bool "LinkUp-L7200"
  290. select FIQ
  291. help
  292. Say Y here if you intend to run this kernel on a LinkUp Systems
  293. L7200 Software Development Board which uses an ARM720T processor.
  294. Information on this board can be obtained at:
  295. <http://www.linkupsys.com/>
  296. If you have any questions or comments about the Linux kernel port
  297. to this board, send e-mail to <sjhill@cotw.com>.
  298. config ARCH_KIRKWOOD
  299. bool "Marvell Kirkwood"
  300. select PCI
  301. select GENERIC_TIME
  302. select GENERIC_CLOCKEVENTS
  303. select PLAT_ORION
  304. help
  305. Support for the following Marvell Kirkwood series SoCs:
  306. 88F6180, 88F6192 and 88F6281.
  307. config ARCH_KS8695
  308. bool "Micrel/Kendin KS8695"
  309. select GENERIC_GPIO
  310. help
  311. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  312. System-on-Chip devices.
  313. config ARCH_NS9XXX
  314. bool "NetSilicon NS9xxx"
  315. select GENERIC_GPIO
  316. select GENERIC_TIME
  317. select GENERIC_CLOCKEVENTS
  318. select HAVE_CLK
  319. help
  320. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  321. System.
  322. <http://www.digi.com/products/microprocessors/index.jsp>
  323. config ARCH_LOKI
  324. bool "Marvell Loki (88RC8480)"
  325. select GENERIC_TIME
  326. select GENERIC_CLOCKEVENTS
  327. select PLAT_ORION
  328. help
  329. Support for the Marvell Loki (88RC8480) SoC.
  330. config ARCH_MV78XX0
  331. bool "Marvell MV78xx0"
  332. select PCI
  333. select GENERIC_TIME
  334. select GENERIC_CLOCKEVENTS
  335. select PLAT_ORION
  336. help
  337. Support for the following Marvell MV78xx0 series SoCs:
  338. MV781x0, MV782x0.
  339. config ARCH_MXC
  340. bool "Freescale MXC/iMX-based"
  341. select GENERIC_TIME
  342. select GENERIC_CLOCKEVENTS
  343. select ARCH_MTD_XIP
  344. select GENERIC_GPIO
  345. select ARCH_REQUIRE_GPIOLIB
  346. help
  347. Support for Freescale MXC/iMX-based family of processors
  348. config ARCH_ORION5X
  349. bool "Marvell Orion"
  350. depends on MMU
  351. select PCI
  352. select GENERIC_GPIO
  353. select GENERIC_TIME
  354. select GENERIC_CLOCKEVENTS
  355. select PLAT_ORION
  356. help
  357. Support for the following Marvell Orion 5x series SoCs:
  358. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  359. Orion-2 (5281).
  360. config ARCH_PNX4008
  361. bool "Philips Nexperia PNX4008 Mobile"
  362. select HAVE_CLK
  363. help
  364. This enables support for Philips PNX4008 mobile platform.
  365. config ARCH_PXA
  366. bool "PXA2xx/PXA3xx-based"
  367. depends on MMU
  368. select ARCH_MTD_XIP
  369. select GENERIC_GPIO
  370. select HAVE_CLK
  371. select ARCH_REQUIRE_GPIOLIB
  372. select GENERIC_TIME
  373. select GENERIC_CLOCKEVENTS
  374. select TICK_ONESHOT
  375. help
  376. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  377. config ARCH_RPC
  378. bool "RiscPC"
  379. select ARCH_ACORN
  380. select FIQ
  381. select TIMER_ACORN
  382. select ARCH_MAY_HAVE_PC_FDC
  383. select HAVE_PATA_PLATFORM
  384. select ISA_DMA_API
  385. select NO_IOPORT
  386. help
  387. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  388. CD-ROM interface, serial and parallel port, and the floppy drive.
  389. config ARCH_SA1100
  390. bool "SA1100-based"
  391. select ISA
  392. select ARCH_DISCONTIGMEM_ENABLE
  393. select ARCH_SPARSEMEM_ENABLE
  394. select ARCH_SELECT_MEMORY_MODEL
  395. select ARCH_MTD_XIP
  396. select GENERIC_GPIO
  397. select GENERIC_TIME
  398. select GENERIC_CLOCKEVENTS
  399. select HAVE_CLK
  400. select TICK_ONESHOT
  401. select ARCH_REQUIRE_GPIOLIB
  402. help
  403. Support for StrongARM 11x0 based boards.
  404. config ARCH_S3C2410
  405. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  406. select GENERIC_GPIO
  407. select HAVE_CLK
  408. help
  409. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  410. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  411. the Samsung SMDK2410 development board (and derivatives).
  412. config ARCH_SHARK
  413. bool "Shark"
  414. select ISA
  415. select ISA_DMA
  416. select PCI
  417. help
  418. Support for the StrongARM based Digital DNARD machine, also known
  419. as "Shark" (<http://www.shark-linux.de/shark.html>).
  420. config ARCH_LH7A40X
  421. bool "Sharp LH7A40X"
  422. help
  423. Say Y here for systems based on one of the Sharp LH7A40X
  424. System on a Chip processors. These CPUs include an ARM922T
  425. core with a wide array of integrated devices for
  426. hand-held and low-power applications.
  427. config ARCH_DAVINCI
  428. bool "TI DaVinci"
  429. select GENERIC_TIME
  430. select GENERIC_CLOCKEVENTS
  431. select GENERIC_GPIO
  432. select HAVE_CLK
  433. help
  434. Support for TI's DaVinci platform.
  435. config ARCH_OMAP
  436. bool "TI OMAP"
  437. select GENERIC_GPIO
  438. select HAVE_CLK
  439. select ARCH_REQUIRE_GPIOLIB
  440. select GENERIC_TIME
  441. select GENERIC_CLOCKEVENTS
  442. help
  443. Support for TI's OMAP platform (OMAP1 and OMAP2).
  444. config ARCH_MSM7X00A
  445. bool "Qualcomm MSM7X00A"
  446. select GENERIC_TIME
  447. select GENERIC_CLOCKEVENTS
  448. help
  449. Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
  450. apps processor of the MSM7X00A and depends on a shared memory
  451. interface to the ARM9 modem processor which runs the baseband stack
  452. and controls some vital subsystems (clock and power control, etc).
  453. <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
  454. endchoice
  455. source "arch/arm/mach-clps711x/Kconfig"
  456. source "arch/arm/mach-ep93xx/Kconfig"
  457. source "arch/arm/mach-footbridge/Kconfig"
  458. source "arch/arm/mach-integrator/Kconfig"
  459. source "arch/arm/mach-iop32x/Kconfig"
  460. source "arch/arm/mach-iop33x/Kconfig"
  461. source "arch/arm/mach-iop13xx/Kconfig"
  462. source "arch/arm/mach-ixp4xx/Kconfig"
  463. source "arch/arm/mach-ixp2000/Kconfig"
  464. source "arch/arm/mach-ixp23xx/Kconfig"
  465. source "arch/arm/mach-loki/Kconfig"
  466. source "arch/arm/mach-mv78xx0/Kconfig"
  467. source "arch/arm/mach-pxa/Kconfig"
  468. source "arch/arm/mach-sa1100/Kconfig"
  469. source "arch/arm/plat-omap/Kconfig"
  470. source "arch/arm/mach-omap1/Kconfig"
  471. source "arch/arm/mach-omap2/Kconfig"
  472. source "arch/arm/mach-orion5x/Kconfig"
  473. source "arch/arm/mach-kirkwood/Kconfig"
  474. source "arch/arm/plat-s3c24xx/Kconfig"
  475. source "arch/arm/plat-s3c/Kconfig"
  476. if ARCH_S3C2410
  477. source "arch/arm/mach-s3c2400/Kconfig"
  478. source "arch/arm/mach-s3c2410/Kconfig"
  479. source "arch/arm/mach-s3c2412/Kconfig"
  480. source "arch/arm/mach-s3c2440/Kconfig"
  481. source "arch/arm/mach-s3c2442/Kconfig"
  482. source "arch/arm/mach-s3c2443/Kconfig"
  483. endif
  484. source "arch/arm/mach-lh7a40x/Kconfig"
  485. source "arch/arm/mach-imx/Kconfig"
  486. source "arch/arm/mach-h720x/Kconfig"
  487. source "arch/arm/mach-versatile/Kconfig"
  488. source "arch/arm/mach-aaec2000/Kconfig"
  489. source "arch/arm/mach-realview/Kconfig"
  490. source "arch/arm/mach-at91/Kconfig"
  491. source "arch/arm/plat-mxc/Kconfig"
  492. source "arch/arm/mach-netx/Kconfig"
  493. source "arch/arm/mach-ns9xxx/Kconfig"
  494. source "arch/arm/mach-davinci/Kconfig"
  495. source "arch/arm/mach-ks8695/Kconfig"
  496. source "arch/arm/mach-msm/Kconfig"
  497. # Definitions to make life easier
  498. config ARCH_ACORN
  499. bool
  500. config PLAT_IOP
  501. bool
  502. config PLAT_ORION
  503. bool
  504. source arch/arm/mm/Kconfig
  505. config IWMMXT
  506. bool "Enable iWMMXt support"
  507. depends on CPU_XSCALE || CPU_XSC3
  508. default y if PXA27x || PXA3xx
  509. help
  510. Enable support for iWMMXt context switching at run time if
  511. running on a CPU that supports it.
  512. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  513. config XSCALE_PMU
  514. bool
  515. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  516. default y
  517. if !MMU
  518. source "arch/arm/Kconfig-nommu"
  519. endif
  520. endmenu
  521. source "arch/arm/common/Kconfig"
  522. config FORCE_MAX_ZONEORDER
  523. int
  524. depends on SA1111
  525. default "9"
  526. menu "Bus support"
  527. config ARM_AMBA
  528. bool
  529. config ISA
  530. bool
  531. help
  532. Find out whether you have ISA slots on your motherboard. ISA is the
  533. name of a bus system, i.e. the way the CPU talks to the other stuff
  534. inside your box. Other bus systems are PCI, EISA, MicroChannel
  535. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  536. newer boards don't support it. If you have ISA, say Y, otherwise N.
  537. # Select ISA DMA controller support
  538. config ISA_DMA
  539. bool
  540. select ISA_DMA_API
  541. # Select ISA DMA interface
  542. config ISA_DMA_API
  543. bool
  544. config PCI
  545. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  546. help
  547. Find out whether you have a PCI motherboard. PCI is the name of a
  548. bus system, i.e. the way the CPU talks to the other stuff inside
  549. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  550. VESA. If you have PCI, say Y, otherwise N.
  551. config PCI_SYSCALL
  552. def_bool PCI
  553. # Select the host bridge type
  554. config PCI_HOST_VIA82C505
  555. bool
  556. depends on PCI && ARCH_SHARK
  557. default y
  558. config PCI_HOST_ITE8152
  559. bool
  560. depends on PCI && MACH_ARMCORE
  561. default y
  562. select DMABOUNCE
  563. source "drivers/pci/Kconfig"
  564. source "drivers/pcmcia/Kconfig"
  565. endmenu
  566. menu "Kernel Features"
  567. source "kernel/time/Kconfig"
  568. config SMP
  569. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  570. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  571. select USE_GENERIC_SMP_HELPERS
  572. help
  573. This enables support for systems with more than one CPU. If you have
  574. a system with only one CPU, like most personal computers, say N. If
  575. you have a system with more than one CPU, say Y.
  576. If you say N here, the kernel will run on single and multiprocessor
  577. machines, but will use only one CPU of a multiprocessor machine. If
  578. you say Y here, the kernel will run on many, but not all, single
  579. processor machines. On a single processor machine, the kernel will
  580. run faster if you say N here.
  581. See also <file:Documentation/i386/IO-APIC.txt>,
  582. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  583. <http://www.linuxdoc.org/docs.html#howto>.
  584. If you don't know what to do here, say N.
  585. config NR_CPUS
  586. int "Maximum number of CPUs (2-32)"
  587. range 2 32
  588. depends on SMP
  589. default "4"
  590. config HOTPLUG_CPU
  591. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  592. depends on SMP && HOTPLUG && EXPERIMENTAL
  593. help
  594. Say Y here to experiment with turning CPUs off and on. CPUs
  595. can be controlled through /sys/devices/system/cpu.
  596. config LOCAL_TIMERS
  597. bool "Use local timer interrupts"
  598. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  599. default y
  600. help
  601. Enable support for local timers on SMP platforms, rather then the
  602. legacy IPI broadcast method. Local timers allows the system
  603. accounting to be spread across the timer interval, preventing a
  604. "thundering herd" at every timer tick.
  605. config PREEMPT
  606. bool "Preemptible Kernel (EXPERIMENTAL)"
  607. depends on EXPERIMENTAL
  608. help
  609. This option reduces the latency of the kernel when reacting to
  610. real-time or interactive events by allowing a low priority process to
  611. be preempted even if it is in kernel mode executing a system call.
  612. This allows applications to run more reliably even when the system is
  613. under load.
  614. Say Y here if you are building a kernel for a desktop, embedded
  615. or real-time system. Say N if you are unsure.
  616. config HZ
  617. int
  618. default 128 if ARCH_L7200
  619. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  620. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  621. default AT91_TIMER_HZ if ARCH_AT91
  622. default 100
  623. config AEABI
  624. bool "Use the ARM EABI to compile the kernel"
  625. help
  626. This option allows for the kernel to be compiled using the latest
  627. ARM ABI (aka EABI). This is only useful if you are using a user
  628. space environment that is also compiled with EABI.
  629. Since there are major incompatibilities between the legacy ABI and
  630. EABI, especially with regard to structure member alignment, this
  631. option also changes the kernel syscall calling convention to
  632. disambiguate both ABIs and allow for backward compatibility support
  633. (selected with CONFIG_OABI_COMPAT).
  634. To use this you need GCC version 4.0.0 or later.
  635. config OABI_COMPAT
  636. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  637. depends on AEABI && EXPERIMENTAL
  638. default y
  639. help
  640. This option preserves the old syscall interface along with the
  641. new (ARM EABI) one. It also provides a compatibility layer to
  642. intercept syscalls that have structure arguments which layout
  643. in memory differs between the legacy ABI and the new ARM EABI
  644. (only for non "thumb" binaries). This option adds a tiny
  645. overhead to all syscalls and produces a slightly larger kernel.
  646. If you know you'll be using only pure EABI user space then you
  647. can say N here. If this option is not selected and you attempt
  648. to execute a legacy ABI binary then the result will be
  649. UNPREDICTABLE (in fact it can be predicted that it won't work
  650. at all). If in doubt say Y.
  651. config ARCH_FLATMEM_HAS_HOLES
  652. bool
  653. default y
  654. depends on FLATMEM
  655. config ARCH_DISCONTIGMEM_ENABLE
  656. bool
  657. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  658. help
  659. Say Y to support efficient handling of discontiguous physical memory,
  660. for architectures which are either NUMA (Non-Uniform Memory Access)
  661. or have huge holes in the physical address space for other reasons.
  662. See <file:Documentation/vm/numa> for more.
  663. config ARCH_SPARSEMEM_ENABLE
  664. bool
  665. config ARCH_SELECT_MEMORY_MODEL
  666. bool
  667. config NODES_SHIFT
  668. int
  669. default "4" if ARCH_LH7A40X
  670. default "2"
  671. depends on NEED_MULTIPLE_NODES
  672. source "mm/Kconfig"
  673. config LEDS
  674. bool "Timer and CPU usage LEDs"
  675. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  676. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  677. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  678. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  679. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  680. ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
  681. ARCH_KS8695 || MACH_RD88F5182
  682. help
  683. If you say Y here, the LEDs on your machine will be used
  684. to provide useful information about your current system status.
  685. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  686. be able to select which LEDs are active using the options below. If
  687. you are compiling a kernel for the EBSA-110 or the LART however, the
  688. red LED will simply flash regularly to indicate that the system is
  689. still functional. It is safe to say Y here if you have a CATS
  690. system, but the driver will do nothing.
  691. config LEDS_TIMER
  692. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  693. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  694. || MACH_OMAP_PERSEUS2
  695. depends on LEDS
  696. depends on !GENERIC_CLOCKEVENTS
  697. default y if ARCH_EBSA110
  698. help
  699. If you say Y here, one of the system LEDs (the green one on the
  700. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  701. will flash regularly to indicate that the system is still
  702. operational. This is mainly useful to kernel hackers who are
  703. debugging unstable kernels.
  704. The LART uses the same LED for both Timer LED and CPU usage LED
  705. functions. You may choose to use both, but the Timer LED function
  706. will overrule the CPU usage LED.
  707. config LEDS_CPU
  708. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  709. !ARCH_OMAP) \
  710. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  711. || MACH_OMAP_PERSEUS2
  712. depends on LEDS
  713. help
  714. If you say Y here, the red LED will be used to give a good real
  715. time indication of CPU usage, by lighting whenever the idle task
  716. is not currently executing.
  717. The LART uses the same LED for both Timer LED and CPU usage LED
  718. functions. You may choose to use both, but the Timer LED function
  719. will overrule the CPU usage LED.
  720. config ALIGNMENT_TRAP
  721. bool
  722. depends on CPU_CP15_MMU
  723. default y if !ARCH_EBSA110
  724. help
  725. ARM processors cannot fetch/store information which is not
  726. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  727. address divisible by 4. On 32-bit ARM processors, these non-aligned
  728. fetch/store instructions will be emulated in software if you say
  729. here, which has a severe performance impact. This is necessary for
  730. correct operation of some network protocols. With an IP-only
  731. configuration it is safe to say N, otherwise say Y.
  732. endmenu
  733. menu "Boot options"
  734. # Compressed boot loader in ROM. Yes, we really want to ask about
  735. # TEXT and BSS so we preserve their values in the config files.
  736. config ZBOOT_ROM_TEXT
  737. hex "Compressed ROM boot loader base address"
  738. default "0"
  739. help
  740. The physical address at which the ROM-able zImage is to be
  741. placed in the target. Platforms which normally make use of
  742. ROM-able zImage formats normally set this to a suitable
  743. value in their defconfig file.
  744. If ZBOOT_ROM is not enabled, this has no effect.
  745. config ZBOOT_ROM_BSS
  746. hex "Compressed ROM boot loader BSS address"
  747. default "0"
  748. help
  749. The base address of an area of read/write memory in the target
  750. for the ROM-able zImage which must be available while the
  751. decompressor is running. It must be large enough to hold the
  752. entire decompressed kernel plus an additional 128 KiB.
  753. Platforms which normally make use of ROM-able zImage formats
  754. normally set this to a suitable value in their defconfig file.
  755. If ZBOOT_ROM is not enabled, this has no effect.
  756. config ZBOOT_ROM
  757. bool "Compressed boot loader in ROM/flash"
  758. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  759. help
  760. Say Y here if you intend to execute your compressed kernel image
  761. (zImage) directly from ROM or flash. If unsure, say N.
  762. config CMDLINE
  763. string "Default kernel command string"
  764. default ""
  765. help
  766. On some architectures (EBSA110 and CATS), there is currently no way
  767. for the boot loader to pass arguments to the kernel. For these
  768. architectures, you should supply some command-line options at build
  769. time by entering them here. As a minimum, you should specify the
  770. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  771. config XIP_KERNEL
  772. bool "Kernel Execute-In-Place from ROM"
  773. depends on !ZBOOT_ROM
  774. help
  775. Execute-In-Place allows the kernel to run from non-volatile storage
  776. directly addressable by the CPU, such as NOR flash. This saves RAM
  777. space since the text section of the kernel is not loaded from flash
  778. to RAM. Read-write sections, such as the data section and stack,
  779. are still copied to RAM. The XIP kernel is not compressed since
  780. it has to run directly from flash, so it will take more space to
  781. store it. The flash address used to link the kernel object files,
  782. and for storing it, is configuration dependent. Therefore, if you
  783. say Y here, you must know the proper physical address where to
  784. store the kernel image depending on your own flash memory usage.
  785. Also note that the make target becomes "make xipImage" rather than
  786. "make zImage" or "make Image". The final kernel binary to put in
  787. ROM memory will be arch/arm/boot/xipImage.
  788. If unsure, say N.
  789. config XIP_PHYS_ADDR
  790. hex "XIP Kernel Physical Location"
  791. depends on XIP_KERNEL
  792. default "0x00080000"
  793. help
  794. This is the physical address in your flash memory the kernel will
  795. be linked for and stored to. This address is dependent on your
  796. own flash usage.
  797. config KEXEC
  798. bool "Kexec system call (EXPERIMENTAL)"
  799. depends on EXPERIMENTAL
  800. help
  801. kexec is a system call that implements the ability to shutdown your
  802. current kernel, and to start another kernel. It is like a reboot
  803. but it is independent of the system firmware. And like a reboot
  804. you can start any kernel with it, not just Linux.
  805. It is an ongoing process to be certain the hardware in a machine
  806. is properly shutdown, so do not be surprised if this code does not
  807. initially work for you. It may help to enable device hotplugging
  808. support.
  809. config ATAGS_PROC
  810. bool "Export atags in procfs"
  811. depends on KEXEC
  812. default y
  813. help
  814. Should the atags used to boot the kernel be exported in an "atags"
  815. file in procfs. Useful with kexec.
  816. endmenu
  817. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
  818. menu "CPU Frequency scaling"
  819. source "drivers/cpufreq/Kconfig"
  820. config CPU_FREQ_SA1100
  821. bool
  822. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  823. default y
  824. config CPU_FREQ_SA1110
  825. bool
  826. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  827. default y
  828. config CPU_FREQ_INTEGRATOR
  829. tristate "CPUfreq driver for ARM Integrator CPUs"
  830. depends on ARCH_INTEGRATOR && CPU_FREQ
  831. default y
  832. help
  833. This enables the CPUfreq driver for ARM Integrator CPUs.
  834. For details, take a look at <file:Documentation/cpu-freq>.
  835. If in doubt, say Y.
  836. config CPU_FREQ_IMX
  837. tristate "CPUfreq driver for i.MX CPUs"
  838. depends on ARCH_IMX && CPU_FREQ
  839. default n
  840. help
  841. This enables the CPUfreq driver for i.MX CPUs.
  842. If in doubt, say N.
  843. config CPU_FREQ_PXA
  844. bool
  845. depends on CPU_FREQ && ARCH_PXA && PXA25x
  846. default y
  847. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  848. endmenu
  849. endif
  850. menu "Floating point emulation"
  851. comment "At least one emulation must be selected"
  852. config FPE_NWFPE
  853. bool "NWFPE math emulation"
  854. depends on !AEABI || OABI_COMPAT
  855. ---help---
  856. Say Y to include the NWFPE floating point emulator in the kernel.
  857. This is necessary to run most binaries. Linux does not currently
  858. support floating point hardware so you need to say Y here even if
  859. your machine has an FPA or floating point co-processor podule.
  860. You may say N here if you are going to load the Acorn FPEmulator
  861. early in the bootup.
  862. config FPE_NWFPE_XP
  863. bool "Support extended precision"
  864. depends on FPE_NWFPE
  865. help
  866. Say Y to include 80-bit support in the kernel floating-point
  867. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  868. Note that gcc does not generate 80-bit operations by default,
  869. so in most cases this option only enlarges the size of the
  870. floating point emulator without any good reason.
  871. You almost surely want to say N here.
  872. config FPE_FASTFPE
  873. bool "FastFPE math emulation (EXPERIMENTAL)"
  874. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  875. ---help---
  876. Say Y here to include the FAST floating point emulator in the kernel.
  877. This is an experimental much faster emulator which now also has full
  878. precision for the mantissa. It does not support any exceptions.
  879. It is very simple, and approximately 3-6 times faster than NWFPE.
  880. It should be sufficient for most programs. It may be not suitable
  881. for scientific calculations, but you have to check this for yourself.
  882. If you do not feel you need a faster FP emulation you should better
  883. choose NWFPE.
  884. config VFP
  885. bool "VFP-format floating point maths"
  886. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  887. help
  888. Say Y to include VFP support code in the kernel. This is needed
  889. if your hardware includes a VFP unit.
  890. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  891. release notes and additional status information.
  892. Say N if your target does not have VFP hardware.
  893. config VFPv3
  894. bool
  895. depends on VFP
  896. default y if CPU_V7
  897. config NEON
  898. bool "Advanced SIMD (NEON) Extension support"
  899. depends on VFPv3 && CPU_V7
  900. help
  901. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  902. Extension.
  903. endmenu
  904. menu "Userspace binary formats"
  905. source "fs/Kconfig.binfmt"
  906. config ARTHUR
  907. tristate "RISC OS personality"
  908. depends on !AEABI
  909. help
  910. Say Y here to include the kernel code necessary if you want to run
  911. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  912. experimental; if this sounds frightening, say N and sleep in peace.
  913. You can also say M here to compile this support as a module (which
  914. will be called arthur).
  915. endmenu
  916. menu "Power management options"
  917. source "kernel/power/Kconfig"
  918. config ARCH_SUSPEND_POSSIBLE
  919. def_bool y
  920. endmenu
  921. source "net/Kconfig"
  922. menu "Device Drivers"
  923. source "drivers/base/Kconfig"
  924. source "drivers/connector/Kconfig"
  925. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  926. source "drivers/mtd/Kconfig"
  927. endif
  928. source "drivers/parport/Kconfig"
  929. source "drivers/pnp/Kconfig"
  930. source "drivers/block/Kconfig"
  931. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  932. source "drivers/misc/Kconfig"
  933. source "drivers/ide/Kconfig"
  934. source "drivers/scsi/Kconfig"
  935. source "drivers/ata/Kconfig"
  936. source "drivers/md/Kconfig"
  937. source "drivers/message/fusion/Kconfig"
  938. source "drivers/ieee1394/Kconfig"
  939. source "drivers/message/i2o/Kconfig"
  940. source "drivers/net/Kconfig"
  941. source "drivers/isdn/Kconfig"
  942. # input before char - char/joystick depends on it. As does USB.
  943. source "drivers/input/Kconfig"
  944. source "drivers/char/Kconfig"
  945. source "drivers/i2c/Kconfig"
  946. source "drivers/spi/Kconfig"
  947. source "drivers/gpio/Kconfig"
  948. source "drivers/w1/Kconfig"
  949. source "drivers/power/Kconfig"
  950. source "drivers/hwmon/Kconfig"
  951. source "drivers/watchdog/Kconfig"
  952. source "drivers/ssb/Kconfig"
  953. #source "drivers/l3/Kconfig"
  954. source "drivers/mfd/Kconfig"
  955. source "drivers/media/Kconfig"
  956. source "drivers/video/Kconfig"
  957. source "sound/Kconfig"
  958. source "drivers/hid/Kconfig"
  959. source "drivers/usb/Kconfig"
  960. source "drivers/mmc/Kconfig"
  961. source "drivers/leds/Kconfig"
  962. source "drivers/rtc/Kconfig"
  963. source "drivers/dma/Kconfig"
  964. source "drivers/dca/Kconfig"
  965. source "drivers/regulator/Kconfig"
  966. source "drivers/uio/Kconfig"
  967. endmenu
  968. source "fs/Kconfig"
  969. source "arch/arm/Kconfig.debug"
  970. source "security/Kconfig"
  971. source "crypto/Kconfig"
  972. source "lib/Kconfig"