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