Kconfig 31 KB

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  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see Documentation/kbuild/kconfig-language.txt.
  4. #
  5. mainmenu "Linux Kernel Configuration"
  6. config ARM
  7. bool
  8. default y
  9. select HAVE_AOUT
  10. select HAVE_IDE
  11. select RTC_LIB
  12. select SYS_SUPPORTS_APM_EMULATION
  13. select HAVE_OPROFILE
  14. select HAVE_ARCH_KGDB
  15. select HAVE_KPROBES if (!XIP_KERNEL)
  16. select HAVE_KRETPROBES if (HAVE_KPROBES)
  17. select HAVE_FTRACE if (!XIP_KERNEL)
  18. select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
  19. select HAVE_GENERIC_DMA_COHERENT
  20. help
  21. The ARM series is a line of low-power-consumption RISC chip designs
  22. licensed by ARM Ltd and targeted at embedded applications and
  23. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  24. manufactured, but legacy ARM-based PC hardware remains popular in
  25. Europe. There is an ARM Linux project with a web page at
  26. <http://www.arm.linux.org.uk/>.
  27. config HAVE_PWM
  28. bool
  29. config SYS_SUPPORTS_APM_EMULATION
  30. bool
  31. config GENERIC_GPIO
  32. bool
  33. default n
  34. config GENERIC_TIME
  35. bool
  36. default n
  37. config GENERIC_CLOCKEVENTS
  38. bool
  39. default n
  40. config GENERIC_CLOCKEVENTS_BROADCAST
  41. bool
  42. depends on GENERIC_CLOCKEVENTS
  43. default y if SMP && !LOCAL_TIMERS
  44. config MMU
  45. bool
  46. default y
  47. config NO_IOPORT
  48. bool
  49. default n
  50. config EISA
  51. bool
  52. ---help---
  53. The Extended Industry Standard Architecture (EISA) bus was
  54. developed as an open alternative to the IBM MicroChannel bus.
  55. The EISA bus provided some of the features of the IBM MicroChannel
  56. bus while maintaining backward compatibility with cards made for
  57. the older ISA bus. The EISA bus saw limited use between 1988 and
  58. 1995 when it was made obsolete by the PCI bus.
  59. Say Y here if you are building a kernel for an EISA-based machine.
  60. Otherwise, say N.
  61. config SBUS
  62. bool
  63. config MCA
  64. bool
  65. help
  66. MicroChannel Architecture is found in some IBM PS/2 machines and
  67. laptops. It is a bus system similar to PCI or ISA. See
  68. <file:Documentation/mca.txt> (and especially the web page given
  69. there) before attempting to build an MCA bus kernel.
  70. config GENERIC_HARDIRQS
  71. bool
  72. default y
  73. config STACKTRACE_SUPPORT
  74. bool
  75. default y
  76. config HAVE_LATENCYTOP_SUPPORT
  77. bool
  78. depends on !SMP
  79. default y
  80. config LOCKDEP_SUPPORT
  81. bool
  82. default y
  83. config TRACE_IRQFLAGS_SUPPORT
  84. bool
  85. default y
  86. config HARDIRQS_SW_RESEND
  87. bool
  88. default y
  89. config GENERIC_IRQ_PROBE
  90. bool
  91. default y
  92. config GENERIC_LOCKBREAK
  93. bool
  94. default y
  95. depends on SMP && PREEMPT
  96. config RWSEM_GENERIC_SPINLOCK
  97. bool
  98. default y
  99. config RWSEM_XCHGADD_ALGORITHM
  100. bool
  101. config ARCH_HAS_ILOG2_U32
  102. bool
  103. default n
  104. config ARCH_HAS_ILOG2_U64
  105. bool
  106. default n
  107. config GENERIC_HWEIGHT
  108. bool
  109. default y
  110. config GENERIC_CALIBRATE_DELAY
  111. bool
  112. default y
  113. config ARCH_MAY_HAVE_PC_FDC
  114. bool
  115. config ZONE_DMA
  116. bool
  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. config OPROFILE_ARMV7
  138. def_bool y
  139. depends on CPU_V7 && !SMP
  140. bool
  141. endif
  142. config VECTORS_BASE
  143. hex
  144. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  145. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  146. default 0x00000000
  147. help
  148. The base address of exception vectors.
  149. source "init/Kconfig"
  150. source "kernel/Kconfig.freezer"
  151. menu "System Type"
  152. choice
  153. prompt "ARM system type"
  154. default ARCH_VERSATILE
  155. config ARCH_AAEC2000
  156. bool "Agilent AAEC-2000 based"
  157. select ARM_AMBA
  158. select HAVE_CLK
  159. help
  160. This enables support for systems based on the Agilent AAEC-2000
  161. config ARCH_INTEGRATOR
  162. bool "ARM Ltd. Integrator family"
  163. select ARM_AMBA
  164. select HAVE_CLK
  165. select ICST525
  166. help
  167. Support for ARM's Integrator platform.
  168. config ARCH_REALVIEW
  169. bool "ARM Ltd. RealView family"
  170. select ARM_AMBA
  171. select HAVE_CLK
  172. select ICST307
  173. select GENERIC_TIME
  174. select GENERIC_CLOCKEVENTS
  175. help
  176. This enables support for ARM Ltd RealView boards.
  177. config ARCH_VERSATILE
  178. bool "ARM Ltd. Versatile family"
  179. select ARM_AMBA
  180. select ARM_VIC
  181. select HAVE_CLK
  182. select ICST307
  183. select GENERIC_TIME
  184. select GENERIC_CLOCKEVENTS
  185. help
  186. This enables support for ARM Ltd Versatile board.
  187. config ARCH_AT91
  188. bool "Atmel AT91"
  189. select GENERIC_GPIO
  190. select HAVE_CLK
  191. help
  192. This enables support for systems based on the Atmel AT91RM9200,
  193. AT91SAM9 and AT91CAP9 processors.
  194. config ARCH_CLPS7500
  195. bool "Cirrus CL-PS7500FE"
  196. select TIMER_ACORN
  197. select ISA
  198. select NO_IOPORT
  199. select ARCH_SPARSEMEM_ENABLE
  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. select VMSPLIT_1G
  254. help
  255. Support for Intel's IOP13XX (XScale) family of processors.
  256. config ARCH_IOP32X
  257. bool "IOP32x-based"
  258. depends on MMU
  259. select PLAT_IOP
  260. select PCI
  261. select GENERIC_GPIO
  262. select ARCH_REQUIRE_GPIOLIB
  263. help
  264. Support for Intel's 80219 and IOP32X (XScale) family of
  265. processors.
  266. config ARCH_IOP33X
  267. bool "IOP33x-based"
  268. depends on MMU
  269. select PLAT_IOP
  270. select PCI
  271. select GENERIC_GPIO
  272. select ARCH_REQUIRE_GPIOLIB
  273. help
  274. Support for Intel's IOP33X (XScale) family of processors.
  275. config ARCH_IXP23XX
  276. bool "IXP23XX-based"
  277. depends on MMU
  278. select PCI
  279. help
  280. Support for Intel's IXP23xx (XScale) family of processors.
  281. config ARCH_IXP2000
  282. bool "IXP2400/2800-based"
  283. depends on MMU
  284. select PCI
  285. help
  286. Support for Intel's IXP2400/2800 (XScale) family of processors.
  287. config ARCH_IXP4XX
  288. bool "IXP4xx-based"
  289. depends on MMU
  290. select GENERIC_GPIO
  291. select GENERIC_TIME
  292. select GENERIC_CLOCKEVENTS
  293. select DMABOUNCE if PCI
  294. help
  295. Support for Intel's IXP4XX (XScale) family of processors.
  296. config ARCH_L7200
  297. bool "LinkUp-L7200"
  298. select FIQ
  299. help
  300. Say Y here if you intend to run this kernel on a LinkUp Systems
  301. L7200 Software Development Board which uses an ARM720T processor.
  302. Information on this board can be obtained at:
  303. <http://www.linkupsys.com/>
  304. If you have any questions or comments about the Linux kernel port
  305. to this board, send e-mail to <sjhill@cotw.com>.
  306. config ARCH_KIRKWOOD
  307. bool "Marvell Kirkwood"
  308. select PCI
  309. select GENERIC_TIME
  310. select GENERIC_CLOCKEVENTS
  311. select PLAT_ORION
  312. help
  313. Support for the following Marvell Kirkwood series SoCs:
  314. 88F6180, 88F6192 and 88F6281.
  315. config ARCH_KS8695
  316. bool "Micrel/Kendin KS8695"
  317. select GENERIC_GPIO
  318. help
  319. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  320. System-on-Chip devices.
  321. config ARCH_NS9XXX
  322. bool "NetSilicon NS9xxx"
  323. select GENERIC_GPIO
  324. select GENERIC_TIME
  325. select GENERIC_CLOCKEVENTS
  326. select HAVE_CLK
  327. help
  328. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  329. System.
  330. <http://www.digi.com/products/microprocessors/index.jsp>
  331. config ARCH_LOKI
  332. bool "Marvell Loki (88RC8480)"
  333. select GENERIC_TIME
  334. select GENERIC_CLOCKEVENTS
  335. select PLAT_ORION
  336. help
  337. Support for the Marvell Loki (88RC8480) SoC.
  338. config ARCH_MV78XX0
  339. bool "Marvell MV78xx0"
  340. select PCI
  341. select GENERIC_TIME
  342. select GENERIC_CLOCKEVENTS
  343. select PLAT_ORION
  344. help
  345. Support for the following Marvell MV78xx0 series SoCs:
  346. MV781x0, MV782x0.
  347. config ARCH_MXC
  348. bool "Freescale MXC/iMX-based"
  349. select GENERIC_TIME
  350. select GENERIC_CLOCKEVENTS
  351. select ARCH_MTD_XIP
  352. select GENERIC_GPIO
  353. select ARCH_REQUIRE_GPIOLIB
  354. help
  355. Support for Freescale MXC/iMX-based family of processors
  356. config ARCH_ORION5X
  357. bool "Marvell Orion"
  358. depends on MMU
  359. select PCI
  360. select GENERIC_GPIO
  361. select GENERIC_TIME
  362. select GENERIC_CLOCKEVENTS
  363. select PLAT_ORION
  364. help
  365. Support for the following Marvell Orion 5x series SoCs:
  366. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  367. Orion-2 (5281), Orion-1-90 (6183).
  368. config ARCH_PNX4008
  369. bool "Philips Nexperia PNX4008 Mobile"
  370. select HAVE_CLK
  371. help
  372. This enables support for Philips PNX4008 mobile platform.
  373. config ARCH_PXA
  374. bool "PXA2xx/PXA3xx-based"
  375. depends on MMU
  376. select ARCH_MTD_XIP
  377. select GENERIC_GPIO
  378. select HAVE_CLK
  379. select ARCH_REQUIRE_GPIOLIB
  380. select GENERIC_TIME
  381. select GENERIC_CLOCKEVENTS
  382. select TICK_ONESHOT
  383. help
  384. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  385. config ARCH_RPC
  386. bool "RiscPC"
  387. select ARCH_ACORN
  388. select FIQ
  389. select TIMER_ACORN
  390. select ARCH_MAY_HAVE_PC_FDC
  391. select HAVE_PATA_PLATFORM
  392. select ISA_DMA_API
  393. select NO_IOPORT
  394. select ARCH_SPARSEMEM_ENABLE
  395. help
  396. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  397. CD-ROM interface, serial and parallel port, and the floppy drive.
  398. config ARCH_SA1100
  399. bool "SA1100-based"
  400. select ISA
  401. select ARCH_SPARSEMEM_ENABLE
  402. select ARCH_MTD_XIP
  403. select GENERIC_GPIO
  404. select GENERIC_TIME
  405. select GENERIC_CLOCKEVENTS
  406. select HAVE_CLK
  407. select TICK_ONESHOT
  408. select ARCH_REQUIRE_GPIOLIB
  409. help
  410. Support for StrongARM 11x0 based boards.
  411. config ARCH_S3C2410
  412. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  413. select GENERIC_GPIO
  414. select HAVE_CLK
  415. help
  416. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  417. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  418. the Samsung SMDK2410 development board (and derivatives).
  419. config ARCH_SHARK
  420. bool "Shark"
  421. select ISA
  422. select ISA_DMA
  423. select ZONE_DMA
  424. select PCI
  425. help
  426. Support for the StrongARM based Digital DNARD machine, also known
  427. as "Shark" (<http://www.shark-linux.de/shark.html>).
  428. config ARCH_LH7A40X
  429. bool "Sharp LH7A40X"
  430. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  431. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  432. help
  433. Say Y here for systems based on one of the Sharp LH7A40X
  434. System on a Chip processors. These CPUs include an ARM922T
  435. core with a wide array of integrated devices for
  436. hand-held and low-power applications.
  437. config ARCH_DAVINCI
  438. bool "TI DaVinci"
  439. select GENERIC_TIME
  440. select GENERIC_CLOCKEVENTS
  441. select GENERIC_GPIO
  442. select ARCH_REQUIRE_GPIOLIB
  443. select HAVE_CLK
  444. select ZONE_DMA
  445. help
  446. Support for TI's DaVinci platform.
  447. config ARCH_OMAP
  448. bool "TI OMAP"
  449. select GENERIC_GPIO
  450. select HAVE_CLK
  451. select ARCH_REQUIRE_GPIOLIB
  452. select GENERIC_TIME
  453. select GENERIC_CLOCKEVENTS
  454. help
  455. Support for TI's OMAP platform (OMAP1 and OMAP2).
  456. config ARCH_MSM
  457. bool "Qualcomm MSM"
  458. select GENERIC_TIME
  459. select GENERIC_CLOCKEVENTS
  460. help
  461. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  462. apps processor of the MSM7K and depends on a shared memory
  463. interface to the ARM9 modem processor which runs the baseband stack
  464. and controls some vital subsystems (clock and power control, etc).
  465. endchoice
  466. source "arch/arm/mach-clps711x/Kconfig"
  467. source "arch/arm/mach-ep93xx/Kconfig"
  468. source "arch/arm/mach-footbridge/Kconfig"
  469. source "arch/arm/mach-integrator/Kconfig"
  470. source "arch/arm/mach-iop32x/Kconfig"
  471. source "arch/arm/mach-iop33x/Kconfig"
  472. source "arch/arm/mach-iop13xx/Kconfig"
  473. source "arch/arm/mach-ixp4xx/Kconfig"
  474. source "arch/arm/mach-ixp2000/Kconfig"
  475. source "arch/arm/mach-ixp23xx/Kconfig"
  476. source "arch/arm/mach-loki/Kconfig"
  477. source "arch/arm/mach-mv78xx0/Kconfig"
  478. source "arch/arm/mach-pxa/Kconfig"
  479. source "arch/arm/mach-sa1100/Kconfig"
  480. source "arch/arm/plat-omap/Kconfig"
  481. source "arch/arm/mach-omap1/Kconfig"
  482. source "arch/arm/mach-omap2/Kconfig"
  483. source "arch/arm/mach-orion5x/Kconfig"
  484. source "arch/arm/mach-kirkwood/Kconfig"
  485. source "arch/arm/plat-s3c24xx/Kconfig"
  486. source "arch/arm/plat-s3c/Kconfig"
  487. if ARCH_S3C2410
  488. source "arch/arm/mach-s3c2400/Kconfig"
  489. source "arch/arm/mach-s3c2410/Kconfig"
  490. source "arch/arm/mach-s3c2412/Kconfig"
  491. source "arch/arm/mach-s3c2440/Kconfig"
  492. source "arch/arm/mach-s3c2442/Kconfig"
  493. source "arch/arm/mach-s3c2443/Kconfig"
  494. endif
  495. source "arch/arm/mach-lh7a40x/Kconfig"
  496. source "arch/arm/mach-imx/Kconfig"
  497. source "arch/arm/mach-h720x/Kconfig"
  498. source "arch/arm/mach-versatile/Kconfig"
  499. source "arch/arm/mach-aaec2000/Kconfig"
  500. source "arch/arm/mach-realview/Kconfig"
  501. source "arch/arm/mach-at91/Kconfig"
  502. source "arch/arm/plat-mxc/Kconfig"
  503. source "arch/arm/mach-netx/Kconfig"
  504. source "arch/arm/mach-ns9xxx/Kconfig"
  505. source "arch/arm/mach-davinci/Kconfig"
  506. source "arch/arm/mach-ks8695/Kconfig"
  507. source "arch/arm/mach-msm/Kconfig"
  508. # Definitions to make life easier
  509. config ARCH_ACORN
  510. bool
  511. config PLAT_IOP
  512. bool
  513. config PLAT_ORION
  514. bool
  515. source arch/arm/mm/Kconfig
  516. config IWMMXT
  517. bool "Enable iWMMXt support"
  518. depends on CPU_XSCALE || CPU_XSC3
  519. default y if PXA27x || PXA3xx
  520. help
  521. Enable support for iWMMXt context switching at run time if
  522. running on a CPU that supports it.
  523. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  524. config XSCALE_PMU
  525. bool
  526. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  527. default y
  528. if !MMU
  529. source "arch/arm/Kconfig-nommu"
  530. endif
  531. endmenu
  532. source "arch/arm/common/Kconfig"
  533. config FORCE_MAX_ZONEORDER
  534. int
  535. depends on SA1111
  536. default "9"
  537. menu "Bus support"
  538. config ARM_AMBA
  539. bool
  540. config ISA
  541. bool
  542. help
  543. Find out whether you have ISA slots on your motherboard. ISA is the
  544. name of a bus system, i.e. the way the CPU talks to the other stuff
  545. inside your box. Other bus systems are PCI, EISA, MicroChannel
  546. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  547. newer boards don't support it. If you have ISA, say Y, otherwise N.
  548. # Select ISA DMA controller support
  549. config ISA_DMA
  550. bool
  551. select ISA_DMA_API
  552. # Select ISA DMA interface
  553. config ISA_DMA_API
  554. bool
  555. config PCI
  556. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  557. help
  558. Find out whether you have a PCI motherboard. PCI is the name of a
  559. bus system, i.e. the way the CPU talks to the other stuff inside
  560. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  561. VESA. If you have PCI, say Y, otherwise N.
  562. config PCI_SYSCALL
  563. def_bool PCI
  564. # Select the host bridge type
  565. config PCI_HOST_VIA82C505
  566. bool
  567. depends on PCI && ARCH_SHARK
  568. default y
  569. config PCI_HOST_ITE8152
  570. bool
  571. depends on PCI && MACH_ARMCORE
  572. default y
  573. select DMABOUNCE
  574. source "drivers/pci/Kconfig"
  575. source "drivers/pcmcia/Kconfig"
  576. endmenu
  577. menu "Kernel Features"
  578. source "kernel/time/Kconfig"
  579. config SMP
  580. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  581. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  582. select USE_GENERIC_SMP_HELPERS
  583. help
  584. This enables support for systems with more than one CPU. If you have
  585. a system with only one CPU, like most personal computers, say N. If
  586. you have a system with more than one CPU, say Y.
  587. If you say N here, the kernel will run on single and multiprocessor
  588. machines, but will use only one CPU of a multiprocessor machine. If
  589. you say Y here, the kernel will run on many, but not all, single
  590. processor machines. On a single processor machine, the kernel will
  591. run faster if you say N here.
  592. See also <file:Documentation/i386/IO-APIC.txt>,
  593. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  594. <http://www.linuxdoc.org/docs.html#howto>.
  595. If you don't know what to do here, say N.
  596. choice
  597. prompt "Memory split"
  598. default VMSPLIT_3G
  599. help
  600. Select the desired split between kernel and user memory.
  601. If you are not absolutely sure what you are doing, leave this
  602. option alone!
  603. config VMSPLIT_3G
  604. bool "3G/1G user/kernel split"
  605. config VMSPLIT_2G
  606. bool "2G/2G user/kernel split"
  607. config VMSPLIT_1G
  608. bool "1G/3G user/kernel split"
  609. endchoice
  610. config PAGE_OFFSET
  611. hex
  612. default 0x40000000 if VMSPLIT_1G
  613. default 0x80000000 if VMSPLIT_2G
  614. default 0xC0000000
  615. config NR_CPUS
  616. int "Maximum number of CPUs (2-32)"
  617. range 2 32
  618. depends on SMP
  619. default "4"
  620. config HOTPLUG_CPU
  621. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  622. depends on SMP && HOTPLUG && EXPERIMENTAL
  623. help
  624. Say Y here to experiment with turning CPUs off and on. CPUs
  625. can be controlled through /sys/devices/system/cpu.
  626. config LOCAL_TIMERS
  627. bool "Use local timer interrupts"
  628. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  629. default y
  630. help
  631. Enable support for local timers on SMP platforms, rather then the
  632. legacy IPI broadcast method. Local timers allows the system
  633. accounting to be spread across the timer interval, preventing a
  634. "thundering herd" at every timer tick.
  635. config PREEMPT
  636. bool "Preemptible Kernel (EXPERIMENTAL)"
  637. depends on EXPERIMENTAL
  638. help
  639. This option reduces the latency of the kernel when reacting to
  640. real-time or interactive events by allowing a low priority process to
  641. be preempted even if it is in kernel mode executing a system call.
  642. This allows applications to run more reliably even when the system is
  643. under load.
  644. Say Y here if you are building a kernel for a desktop, embedded
  645. or real-time system. Say N if you are unsure.
  646. config HZ
  647. int
  648. default 128 if ARCH_L7200
  649. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  650. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  651. default AT91_TIMER_HZ if ARCH_AT91
  652. default 100
  653. config AEABI
  654. bool "Use the ARM EABI to compile the kernel"
  655. help
  656. This option allows for the kernel to be compiled using the latest
  657. ARM ABI (aka EABI). This is only useful if you are using a user
  658. space environment that is also compiled with EABI.
  659. Since there are major incompatibilities between the legacy ABI and
  660. EABI, especially with regard to structure member alignment, this
  661. option also changes the kernel syscall calling convention to
  662. disambiguate both ABIs and allow for backward compatibility support
  663. (selected with CONFIG_OABI_COMPAT).
  664. To use this you need GCC version 4.0.0 or later.
  665. config OABI_COMPAT
  666. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  667. depends on AEABI && EXPERIMENTAL
  668. default y
  669. help
  670. This option preserves the old syscall interface along with the
  671. new (ARM EABI) one. It also provides a compatibility layer to
  672. intercept syscalls that have structure arguments which layout
  673. in memory differs between the legacy ABI and the new ARM EABI
  674. (only for non "thumb" binaries). This option adds a tiny
  675. overhead to all syscalls and produces a slightly larger kernel.
  676. If you know you'll be using only pure EABI user space then you
  677. can say N here. If this option is not selected and you attempt
  678. to execute a legacy ABI binary then the result will be
  679. UNPREDICTABLE (in fact it can be predicted that it won't work
  680. at all). If in doubt say Y.
  681. config ARCH_FLATMEM_HAS_HOLES
  682. bool
  683. default y
  684. depends on FLATMEM
  685. # Discontigmem is deprecated
  686. config ARCH_DISCONTIGMEM_ENABLE
  687. bool
  688. config ARCH_SPARSEMEM_ENABLE
  689. bool
  690. config ARCH_SPARSEMEM_DEFAULT
  691. def_bool ARCH_SPARSEMEM_ENABLE
  692. config ARCH_SELECT_MEMORY_MODEL
  693. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  694. config NODES_SHIFT
  695. int
  696. default "4" if ARCH_LH7A40X
  697. default "2"
  698. depends on NEED_MULTIPLE_NODES
  699. source "mm/Kconfig"
  700. config LEDS
  701. bool "Timer and CPU usage LEDs"
  702. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  703. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  704. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  705. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  706. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  707. ARCH_AT91 || ARCH_DAVINCI || \
  708. ARCH_KS8695 || MACH_RD88F5182
  709. help
  710. If you say Y here, the LEDs on your machine will be used
  711. to provide useful information about your current system status.
  712. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  713. be able to select which LEDs are active using the options below. If
  714. you are compiling a kernel for the EBSA-110 or the LART however, the
  715. red LED will simply flash regularly to indicate that the system is
  716. still functional. It is safe to say Y here if you have a CATS
  717. system, but the driver will do nothing.
  718. config LEDS_TIMER
  719. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  720. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  721. || MACH_OMAP_PERSEUS2
  722. depends on LEDS
  723. depends on !GENERIC_CLOCKEVENTS
  724. default y if ARCH_EBSA110
  725. help
  726. If you say Y here, one of the system LEDs (the green one on the
  727. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  728. will flash regularly to indicate that the system is still
  729. operational. This is mainly useful to kernel hackers who are
  730. debugging unstable kernels.
  731. The LART uses the same LED for both Timer LED and CPU usage LED
  732. functions. You may choose to use both, but the Timer LED function
  733. will overrule the CPU usage LED.
  734. config LEDS_CPU
  735. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  736. !ARCH_OMAP) \
  737. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  738. || MACH_OMAP_PERSEUS2
  739. depends on LEDS
  740. help
  741. If you say Y here, the red LED will be used to give a good real
  742. time indication of CPU usage, by lighting whenever the idle task
  743. is not currently executing.
  744. The LART uses the same LED for both Timer LED and CPU usage LED
  745. functions. You may choose to use both, but the Timer LED function
  746. will overrule the CPU usage LED.
  747. config ALIGNMENT_TRAP
  748. bool
  749. depends on CPU_CP15_MMU
  750. default y if !ARCH_EBSA110
  751. help
  752. ARM processors cannot fetch/store information which is not
  753. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  754. address divisible by 4. On 32-bit ARM processors, these non-aligned
  755. fetch/store instructions will be emulated in software if you say
  756. here, which has a severe performance impact. This is necessary for
  757. correct operation of some network protocols. With an IP-only
  758. configuration it is safe to say N, otherwise say Y.
  759. endmenu
  760. menu "Boot options"
  761. # Compressed boot loader in ROM. Yes, we really want to ask about
  762. # TEXT and BSS so we preserve their values in the config files.
  763. config ZBOOT_ROM_TEXT
  764. hex "Compressed ROM boot loader base address"
  765. default "0"
  766. help
  767. The physical address at which the ROM-able zImage is to be
  768. placed in the target. Platforms which normally make use of
  769. ROM-able zImage formats normally set this to a suitable
  770. value in their defconfig file.
  771. If ZBOOT_ROM is not enabled, this has no effect.
  772. config ZBOOT_ROM_BSS
  773. hex "Compressed ROM boot loader BSS address"
  774. default "0"
  775. help
  776. The base address of an area of read/write memory in the target
  777. for the ROM-able zImage which must be available while the
  778. decompressor is running. It must be large enough to hold the
  779. entire decompressed kernel plus an additional 128 KiB.
  780. Platforms which normally make use of ROM-able zImage formats
  781. normally set this to a suitable value in their defconfig file.
  782. If ZBOOT_ROM is not enabled, this has no effect.
  783. config ZBOOT_ROM
  784. bool "Compressed boot loader in ROM/flash"
  785. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  786. help
  787. Say Y here if you intend to execute your compressed kernel image
  788. (zImage) directly from ROM or flash. If unsure, say N.
  789. config CMDLINE
  790. string "Default kernel command string"
  791. default ""
  792. help
  793. On some architectures (EBSA110 and CATS), there is currently no way
  794. for the boot loader to pass arguments to the kernel. For these
  795. architectures, you should supply some command-line options at build
  796. time by entering them here. As a minimum, you should specify the
  797. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  798. config XIP_KERNEL
  799. bool "Kernel Execute-In-Place from ROM"
  800. depends on !ZBOOT_ROM
  801. help
  802. Execute-In-Place allows the kernel to run from non-volatile storage
  803. directly addressable by the CPU, such as NOR flash. This saves RAM
  804. space since the text section of the kernel is not loaded from flash
  805. to RAM. Read-write sections, such as the data section and stack,
  806. are still copied to RAM. The XIP kernel is not compressed since
  807. it has to run directly from flash, so it will take more space to
  808. store it. The flash address used to link the kernel object files,
  809. and for storing it, is configuration dependent. Therefore, if you
  810. say Y here, you must know the proper physical address where to
  811. store the kernel image depending on your own flash memory usage.
  812. Also note that the make target becomes "make xipImage" rather than
  813. "make zImage" or "make Image". The final kernel binary to put in
  814. ROM memory will be arch/arm/boot/xipImage.
  815. If unsure, say N.
  816. config XIP_PHYS_ADDR
  817. hex "XIP Kernel Physical Location"
  818. depends on XIP_KERNEL
  819. default "0x00080000"
  820. help
  821. This is the physical address in your flash memory the kernel will
  822. be linked for and stored to. This address is dependent on your
  823. own flash usage.
  824. config KEXEC
  825. bool "Kexec system call (EXPERIMENTAL)"
  826. depends on EXPERIMENTAL
  827. help
  828. kexec is a system call that implements the ability to shutdown your
  829. current kernel, and to start another kernel. It is like a reboot
  830. but it is independent of the system firmware. And like a reboot
  831. you can start any kernel with it, not just Linux.
  832. It is an ongoing process to be certain the hardware in a machine
  833. is properly shutdown, so do not be surprised if this code does not
  834. initially work for you. It may help to enable device hotplugging
  835. support.
  836. config ATAGS_PROC
  837. bool "Export atags in procfs"
  838. depends on KEXEC
  839. default y
  840. help
  841. Should the atags used to boot the kernel be exported in an "atags"
  842. file in procfs. Useful with kexec.
  843. endmenu
  844. menu "CPU Power Management"
  845. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
  846. source "drivers/cpufreq/Kconfig"
  847. config CPU_FREQ_SA1100
  848. bool
  849. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  850. default y
  851. config CPU_FREQ_SA1110
  852. bool
  853. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  854. default y
  855. config CPU_FREQ_INTEGRATOR
  856. tristate "CPUfreq driver for ARM Integrator CPUs"
  857. depends on ARCH_INTEGRATOR && CPU_FREQ
  858. default y
  859. help
  860. This enables the CPUfreq driver for ARM Integrator CPUs.
  861. For details, take a look at <file:Documentation/cpu-freq>.
  862. If in doubt, say Y.
  863. config CPU_FREQ_IMX
  864. tristate "CPUfreq driver for i.MX CPUs"
  865. depends on ARCH_IMX && CPU_FREQ
  866. default n
  867. help
  868. This enables the CPUfreq driver for i.MX CPUs.
  869. If in doubt, say N.
  870. config CPU_FREQ_PXA
  871. bool
  872. depends on CPU_FREQ && ARCH_PXA && PXA25x
  873. default y
  874. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  875. endif
  876. source "drivers/cpuidle/Kconfig"
  877. endmenu
  878. menu "Floating point emulation"
  879. comment "At least one emulation must be selected"
  880. config FPE_NWFPE
  881. bool "NWFPE math emulation"
  882. depends on !AEABI || OABI_COMPAT
  883. ---help---
  884. Say Y to include the NWFPE floating point emulator in the kernel.
  885. This is necessary to run most binaries. Linux does not currently
  886. support floating point hardware so you need to say Y here even if
  887. your machine has an FPA or floating point co-processor podule.
  888. You may say N here if you are going to load the Acorn FPEmulator
  889. early in the bootup.
  890. config FPE_NWFPE_XP
  891. bool "Support extended precision"
  892. depends on FPE_NWFPE
  893. help
  894. Say Y to include 80-bit support in the kernel floating-point
  895. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  896. Note that gcc does not generate 80-bit operations by default,
  897. so in most cases this option only enlarges the size of the
  898. floating point emulator without any good reason.
  899. You almost surely want to say N here.
  900. config FPE_FASTFPE
  901. bool "FastFPE math emulation (EXPERIMENTAL)"
  902. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  903. ---help---
  904. Say Y here to include the FAST floating point emulator in the kernel.
  905. This is an experimental much faster emulator which now also has full
  906. precision for the mantissa. It does not support any exceptions.
  907. It is very simple, and approximately 3-6 times faster than NWFPE.
  908. It should be sufficient for most programs. It may be not suitable
  909. for scientific calculations, but you have to check this for yourself.
  910. If you do not feel you need a faster FP emulation you should better
  911. choose NWFPE.
  912. config VFP
  913. bool "VFP-format floating point maths"
  914. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  915. help
  916. Say Y to include VFP support code in the kernel. This is needed
  917. if your hardware includes a VFP unit.
  918. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  919. release notes and additional status information.
  920. Say N if your target does not have VFP hardware.
  921. config VFPv3
  922. bool
  923. depends on VFP
  924. default y if CPU_V7
  925. config NEON
  926. bool "Advanced SIMD (NEON) Extension support"
  927. depends on VFPv3 && CPU_V7
  928. help
  929. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  930. Extension.
  931. endmenu
  932. menu "Userspace binary formats"
  933. source "fs/Kconfig.binfmt"
  934. config ARTHUR
  935. tristate "RISC OS personality"
  936. depends on !AEABI
  937. help
  938. Say Y here to include the kernel code necessary if you want to run
  939. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  940. experimental; if this sounds frightening, say N and sleep in peace.
  941. You can also say M here to compile this support as a module (which
  942. will be called arthur).
  943. endmenu
  944. menu "Power management options"
  945. source "kernel/power/Kconfig"
  946. config ARCH_SUSPEND_POSSIBLE
  947. def_bool y
  948. endmenu
  949. source "net/Kconfig"
  950. menu "Device Drivers"
  951. source "drivers/base/Kconfig"
  952. source "drivers/connector/Kconfig"
  953. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  954. source "drivers/mtd/Kconfig"
  955. endif
  956. source "drivers/parport/Kconfig"
  957. source "drivers/pnp/Kconfig"
  958. source "drivers/block/Kconfig"
  959. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  960. source "drivers/misc/Kconfig"
  961. source "drivers/ide/Kconfig"
  962. source "drivers/scsi/Kconfig"
  963. source "drivers/ata/Kconfig"
  964. source "drivers/md/Kconfig"
  965. source "drivers/message/fusion/Kconfig"
  966. source "drivers/ieee1394/Kconfig"
  967. source "drivers/message/i2o/Kconfig"
  968. source "drivers/net/Kconfig"
  969. source "drivers/isdn/Kconfig"
  970. # input before char - char/joystick depends on it. As does USB.
  971. source "drivers/input/Kconfig"
  972. source "drivers/char/Kconfig"
  973. source "drivers/i2c/Kconfig"
  974. source "drivers/spi/Kconfig"
  975. source "drivers/gpio/Kconfig"
  976. source "drivers/w1/Kconfig"
  977. source "drivers/power/Kconfig"
  978. source "drivers/hwmon/Kconfig"
  979. source "drivers/thermal/Kconfig"
  980. source "drivers/watchdog/Kconfig"
  981. source "drivers/ssb/Kconfig"
  982. #source "drivers/l3/Kconfig"
  983. source "drivers/mfd/Kconfig"
  984. source "drivers/media/Kconfig"
  985. source "drivers/video/Kconfig"
  986. source "sound/Kconfig"
  987. source "drivers/hid/Kconfig"
  988. source "drivers/usb/Kconfig"
  989. source "drivers/uwb/Kconfig"
  990. source "drivers/mmc/Kconfig"
  991. source "drivers/memstick/Kconfig"
  992. source "drivers/accessibility/Kconfig"
  993. source "drivers/leds/Kconfig"
  994. source "drivers/rtc/Kconfig"
  995. source "drivers/dma/Kconfig"
  996. source "drivers/dca/Kconfig"
  997. source "drivers/auxdisplay/Kconfig"
  998. source "drivers/regulator/Kconfig"
  999. source "drivers/uio/Kconfig"
  1000. endmenu
  1001. source "fs/Kconfig"
  1002. source "arch/arm/Kconfig.debug"
  1003. source "security/Kconfig"
  1004. source "crypto/Kconfig"
  1005. source "lib/Kconfig"