Kconfig 31 KB

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  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see Documentation/kbuild/kconfig-language.txt.
  4. #
  5. mainmenu "Linux Kernel Configuration"
  6. config ARM
  7. bool
  8. default y
  9. select HAVE_IDE
  10. select RTC_LIB
  11. select SYS_SUPPORTS_APM_EMULATION
  12. select HAVE_OPROFILE
  13. select HAVE_ARCH_KGDB
  14. select HAVE_KPROBES if (!XIP_KERNEL)
  15. select HAVE_KRETPROBES if (HAVE_KPROBES)
  16. select HAVE_FTRACE if (!XIP_KERNEL)
  17. select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
  18. select HAVE_GENERIC_DMA_COHERENT
  19. help
  20. The ARM series is a line of low-power-consumption RISC chip designs
  21. licensed by ARM Ltd and targeted at embedded applications and
  22. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  23. manufactured, but legacy ARM-based PC hardware remains popular in
  24. Europe. There is an ARM Linux project with a web page at
  25. <http://www.arm.linux.org.uk/>.
  26. config HAVE_PWM
  27. bool
  28. config SYS_SUPPORTS_APM_EMULATION
  29. bool
  30. config GENERIC_GPIO
  31. bool
  32. default n
  33. config GENERIC_TIME
  34. bool
  35. default n
  36. config GENERIC_CLOCKEVENTS
  37. bool
  38. default n
  39. config GENERIC_CLOCKEVENTS_BROADCAST
  40. bool
  41. depends on GENERIC_CLOCKEVENTS
  42. default y if SMP && !LOCAL_TIMERS
  43. config MMU
  44. bool
  45. default y
  46. config NO_IOPORT
  47. bool
  48. default n
  49. config EISA
  50. bool
  51. ---help---
  52. The Extended Industry Standard Architecture (EISA) bus was
  53. developed as an open alternative to the IBM MicroChannel bus.
  54. The EISA bus provided some of the features of the IBM MicroChannel
  55. bus while maintaining backward compatibility with cards made for
  56. the older ISA bus. The EISA bus saw limited use between 1988 and
  57. 1995 when it was made obsolete by the PCI bus.
  58. Say Y here if you are building a kernel for an EISA-based machine.
  59. Otherwise, say N.
  60. config SBUS
  61. bool
  62. config MCA
  63. bool
  64. help
  65. MicroChannel Architecture is found in some IBM PS/2 machines and
  66. laptops. It is a bus system similar to PCI or ISA. See
  67. <file:Documentation/mca.txt> (and especially the web page given
  68. there) before attempting to build an MCA bus kernel.
  69. config GENERIC_HARDIRQS
  70. bool
  71. default y
  72. config STACKTRACE_SUPPORT
  73. bool
  74. default y
  75. config HAVE_LATENCYTOP_SUPPORT
  76. bool
  77. depends on !SMP
  78. default y
  79. config LOCKDEP_SUPPORT
  80. bool
  81. default y
  82. config TRACE_IRQFLAGS_SUPPORT
  83. bool
  84. default y
  85. config HARDIRQS_SW_RESEND
  86. bool
  87. default y
  88. config GENERIC_IRQ_PROBE
  89. bool
  90. default y
  91. config GENERIC_LOCKBREAK
  92. bool
  93. default y
  94. depends on SMP && PREEMPT
  95. config RWSEM_GENERIC_SPINLOCK
  96. bool
  97. default y
  98. config RWSEM_XCHGADD_ALGORITHM
  99. bool
  100. config ARCH_HAS_ILOG2_U32
  101. bool
  102. default n
  103. config ARCH_HAS_ILOG2_U64
  104. bool
  105. default n
  106. config GENERIC_HWEIGHT
  107. bool
  108. default y
  109. config GENERIC_CALIBRATE_DELAY
  110. bool
  111. default y
  112. config ARCH_SUPPORTS_AOUT
  113. def_bool y
  114. config ARCH_MAY_HAVE_PC_FDC
  115. bool
  116. config ZONE_DMA
  117. bool
  118. default y
  119. config GENERIC_ISA_DMA
  120. bool
  121. config FIQ
  122. bool
  123. config ARCH_MTD_XIP
  124. bool
  125. config GENERIC_HARDIRQS_NO__DO_IRQ
  126. bool
  127. def_bool y
  128. if OPROFILE
  129. config OPROFILE_ARMV6
  130. def_bool y
  131. depends on CPU_V6 && !SMP
  132. select OPROFILE_ARM11_CORE
  133. config OPROFILE_MPCORE
  134. def_bool y
  135. depends on CPU_V6 && SMP
  136. select OPROFILE_ARM11_CORE
  137. config OPROFILE_ARM11_CORE
  138. bool
  139. config OPROFILE_ARMV7
  140. def_bool y
  141. depends on CPU_V7 && !SMP
  142. bool
  143. endif
  144. config VECTORS_BASE
  145. hex
  146. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  147. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  148. default 0x00000000
  149. help
  150. The base address of exception vectors.
  151. source "init/Kconfig"
  152. menu "System Type"
  153. choice
  154. prompt "ARM system type"
  155. default ARCH_VERSATILE
  156. config ARCH_AAEC2000
  157. bool "Agilent AAEC-2000 based"
  158. select ARM_AMBA
  159. select HAVE_CLK
  160. help
  161. This enables support for systems based on the Agilent AAEC-2000
  162. config ARCH_INTEGRATOR
  163. bool "ARM Ltd. Integrator family"
  164. select ARM_AMBA
  165. select HAVE_CLK
  166. select ICST525
  167. help
  168. Support for ARM's Integrator platform.
  169. config ARCH_REALVIEW
  170. bool "ARM Ltd. RealView family"
  171. select ARM_AMBA
  172. select HAVE_CLK
  173. select ICST307
  174. select GENERIC_TIME
  175. select GENERIC_CLOCKEVENTS
  176. help
  177. This enables support for ARM Ltd RealView boards.
  178. config ARCH_VERSATILE
  179. bool "ARM Ltd. Versatile family"
  180. select ARM_AMBA
  181. select ARM_VIC
  182. select HAVE_CLK
  183. select ICST307
  184. select GENERIC_TIME
  185. select GENERIC_CLOCKEVENTS
  186. help
  187. This enables support for ARM Ltd Versatile board.
  188. config ARCH_AT91
  189. bool "Atmel AT91"
  190. select GENERIC_GPIO
  191. select HAVE_CLK
  192. help
  193. This enables support for systems based on the Atmel AT91RM9200,
  194. AT91SAM9 and AT91CAP9 processors.
  195. config ARCH_CLPS7500
  196. bool "Cirrus CL-PS7500FE"
  197. select TIMER_ACORN
  198. select ISA
  199. select NO_IOPORT
  200. select ARCH_SPARSEMEM_ENABLE
  201. help
  202. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  203. config ARCH_CLPS711X
  204. bool "Cirrus Logic CLPS711x/EP721x-based"
  205. help
  206. Support for Cirrus Logic 711x/721x based boards.
  207. config ARCH_EBSA110
  208. bool "EBSA-110"
  209. select ISA
  210. select NO_IOPORT
  211. help
  212. This is an evaluation board for the StrongARM processor available
  213. from Digital. It has limited hardware on-board, including an
  214. Ethernet interface, two PCMCIA sockets, two serial ports and a
  215. parallel port.
  216. config ARCH_EP93XX
  217. bool "EP93xx-based"
  218. select ARM_AMBA
  219. select ARM_VIC
  220. select GENERIC_GPIO
  221. select HAVE_CLK
  222. select ARCH_REQUIRE_GPIOLIB
  223. help
  224. This enables support for the Cirrus EP93xx series of CPUs.
  225. config ARCH_FOOTBRIDGE
  226. bool "FootBridge"
  227. select FOOTBRIDGE
  228. help
  229. Support for systems based on the DC21285 companion chip
  230. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  231. config ARCH_NETX
  232. bool "Hilscher NetX based"
  233. select ARM_VIC
  234. help
  235. This enables support for systems based on the Hilscher NetX Soc
  236. config ARCH_H720X
  237. bool "Hynix HMS720x-based"
  238. select ISA_DMA_API
  239. help
  240. This enables support for systems based on the Hynix HMS720x
  241. config ARCH_IMX
  242. bool "IMX"
  243. select GENERIC_GPIO
  244. select GENERIC_TIME
  245. select GENERIC_CLOCKEVENTS
  246. help
  247. Support for Motorola's i.MX family of processors (MX1, MXL).
  248. config ARCH_IOP13XX
  249. bool "IOP13xx-based"
  250. depends on MMU
  251. select PLAT_IOP
  252. select PCI
  253. select ARCH_SUPPORTS_MSI
  254. select VMSPLIT_1G
  255. help
  256. Support for Intel's IOP13XX (XScale) family of processors.
  257. config ARCH_IOP32X
  258. bool "IOP32x-based"
  259. depends on MMU
  260. select PLAT_IOP
  261. select PCI
  262. select GENERIC_GPIO
  263. select ARCH_REQUIRE_GPIOLIB
  264. help
  265. Support for Intel's 80219 and IOP32X (XScale) family of
  266. processors.
  267. config ARCH_IOP33X
  268. bool "IOP33x-based"
  269. depends on MMU
  270. select PLAT_IOP
  271. select PCI
  272. select GENERIC_GPIO
  273. select ARCH_REQUIRE_GPIOLIB
  274. help
  275. Support for Intel's IOP33X (XScale) family of processors.
  276. config ARCH_IXP23XX
  277. bool "IXP23XX-based"
  278. depends on MMU
  279. select PCI
  280. help
  281. Support for Intel's IXP23xx (XScale) family of processors.
  282. config ARCH_IXP2000
  283. bool "IXP2400/2800-based"
  284. depends on MMU
  285. select PCI
  286. help
  287. Support for Intel's IXP2400/2800 (XScale) family of processors.
  288. config ARCH_IXP4XX
  289. bool "IXP4xx-based"
  290. depends on MMU
  291. select GENERIC_GPIO
  292. select GENERIC_TIME
  293. select GENERIC_CLOCKEVENTS
  294. 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).
  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 PCI
  424. help
  425. Support for the StrongARM based Digital DNARD machine, also known
  426. as "Shark" (<http://www.shark-linux.de/shark.html>).
  427. config ARCH_LH7A40X
  428. bool "Sharp LH7A40X"
  429. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  430. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  431. help
  432. Say Y here for systems based on one of the Sharp LH7A40X
  433. System on a Chip processors. These CPUs include an ARM922T
  434. core with a wide array of integrated devices for
  435. hand-held and low-power applications.
  436. config ARCH_DAVINCI
  437. bool "TI DaVinci"
  438. select GENERIC_TIME
  439. select GENERIC_CLOCKEVENTS
  440. select GENERIC_GPIO
  441. select HAVE_CLK
  442. help
  443. Support for TI's DaVinci platform.
  444. config ARCH_OMAP
  445. bool "TI OMAP"
  446. select GENERIC_GPIO
  447. select HAVE_CLK
  448. select ARCH_REQUIRE_GPIOLIB
  449. select GENERIC_TIME
  450. select GENERIC_CLOCKEVENTS
  451. help
  452. Support for TI's OMAP platform (OMAP1 and OMAP2).
  453. config ARCH_MSM7X00A
  454. bool "Qualcomm MSM7X00A"
  455. select GENERIC_TIME
  456. select GENERIC_CLOCKEVENTS
  457. help
  458. Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
  459. apps processor of the MSM7X00A and depends on a shared memory
  460. interface to the ARM9 modem processor which runs the baseband stack
  461. and controls some vital subsystems (clock and power control, etc).
  462. <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
  463. endchoice
  464. source "arch/arm/mach-clps711x/Kconfig"
  465. source "arch/arm/mach-ep93xx/Kconfig"
  466. source "arch/arm/mach-footbridge/Kconfig"
  467. source "arch/arm/mach-integrator/Kconfig"
  468. source "arch/arm/mach-iop32x/Kconfig"
  469. source "arch/arm/mach-iop33x/Kconfig"
  470. source "arch/arm/mach-iop13xx/Kconfig"
  471. source "arch/arm/mach-ixp4xx/Kconfig"
  472. source "arch/arm/mach-ixp2000/Kconfig"
  473. source "arch/arm/mach-ixp23xx/Kconfig"
  474. source "arch/arm/mach-loki/Kconfig"
  475. source "arch/arm/mach-mv78xx0/Kconfig"
  476. source "arch/arm/mach-pxa/Kconfig"
  477. source "arch/arm/mach-sa1100/Kconfig"
  478. source "arch/arm/plat-omap/Kconfig"
  479. source "arch/arm/mach-omap1/Kconfig"
  480. source "arch/arm/mach-omap2/Kconfig"
  481. source "arch/arm/mach-orion5x/Kconfig"
  482. source "arch/arm/mach-kirkwood/Kconfig"
  483. source "arch/arm/plat-s3c24xx/Kconfig"
  484. source "arch/arm/plat-s3c/Kconfig"
  485. if ARCH_S3C2410
  486. source "arch/arm/mach-s3c2400/Kconfig"
  487. source "arch/arm/mach-s3c2410/Kconfig"
  488. source "arch/arm/mach-s3c2412/Kconfig"
  489. source "arch/arm/mach-s3c2440/Kconfig"
  490. source "arch/arm/mach-s3c2442/Kconfig"
  491. source "arch/arm/mach-s3c2443/Kconfig"
  492. endif
  493. source "arch/arm/mach-lh7a40x/Kconfig"
  494. source "arch/arm/mach-imx/Kconfig"
  495. source "arch/arm/mach-h720x/Kconfig"
  496. source "arch/arm/mach-versatile/Kconfig"
  497. source "arch/arm/mach-aaec2000/Kconfig"
  498. source "arch/arm/mach-realview/Kconfig"
  499. source "arch/arm/mach-at91/Kconfig"
  500. source "arch/arm/plat-mxc/Kconfig"
  501. source "arch/arm/mach-netx/Kconfig"
  502. source "arch/arm/mach-ns9xxx/Kconfig"
  503. source "arch/arm/mach-davinci/Kconfig"
  504. source "arch/arm/mach-ks8695/Kconfig"
  505. source "arch/arm/mach-msm/Kconfig"
  506. # Definitions to make life easier
  507. config ARCH_ACORN
  508. bool
  509. config PLAT_IOP
  510. bool
  511. config PLAT_ORION
  512. bool
  513. source arch/arm/mm/Kconfig
  514. config IWMMXT
  515. bool "Enable iWMMXt support"
  516. depends on CPU_XSCALE || CPU_XSC3
  517. default y if PXA27x || PXA3xx
  518. help
  519. Enable support for iWMMXt context switching at run time if
  520. running on a CPU that supports it.
  521. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  522. config XSCALE_PMU
  523. bool
  524. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  525. default y
  526. if !MMU
  527. source "arch/arm/Kconfig-nommu"
  528. endif
  529. endmenu
  530. source "arch/arm/common/Kconfig"
  531. config FORCE_MAX_ZONEORDER
  532. int
  533. depends on SA1111
  534. default "9"
  535. menu "Bus support"
  536. config ARM_AMBA
  537. bool
  538. config ISA
  539. bool
  540. help
  541. Find out whether you have ISA slots on your motherboard. ISA is the
  542. name of a bus system, i.e. the way the CPU talks to the other stuff
  543. inside your box. Other bus systems are PCI, EISA, MicroChannel
  544. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  545. newer boards don't support it. If you have ISA, say Y, otherwise N.
  546. # Select ISA DMA controller support
  547. config ISA_DMA
  548. bool
  549. select ISA_DMA_API
  550. # Select ISA DMA interface
  551. config ISA_DMA_API
  552. bool
  553. config PCI
  554. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  555. help
  556. Find out whether you have a PCI motherboard. PCI is the name of a
  557. bus system, i.e. the way the CPU talks to the other stuff inside
  558. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  559. VESA. If you have PCI, say Y, otherwise N.
  560. config PCI_SYSCALL
  561. def_bool PCI
  562. # Select the host bridge type
  563. config PCI_HOST_VIA82C505
  564. bool
  565. depends on PCI && ARCH_SHARK
  566. default y
  567. config PCI_HOST_ITE8152
  568. bool
  569. depends on PCI && MACH_ARMCORE
  570. default y
  571. select DMABOUNCE
  572. source "drivers/pci/Kconfig"
  573. source "drivers/pcmcia/Kconfig"
  574. endmenu
  575. menu "Kernel Features"
  576. source "kernel/time/Kconfig"
  577. config SMP
  578. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  579. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  580. select USE_GENERIC_SMP_HELPERS
  581. help
  582. This enables support for systems with more than one CPU. If you have
  583. a system with only one CPU, like most personal computers, say N. If
  584. you have a system with more than one CPU, say Y.
  585. If you say N here, the kernel will run on single and multiprocessor
  586. machines, but will use only one CPU of a multiprocessor machine. If
  587. you say Y here, the kernel will run on many, but not all, single
  588. processor machines. On a single processor machine, the kernel will
  589. run faster if you say N here.
  590. See also <file:Documentation/i386/IO-APIC.txt>,
  591. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  592. <http://www.linuxdoc.org/docs.html#howto>.
  593. If you don't know what to do here, say N.
  594. choice
  595. prompt "Memory split"
  596. default VMSPLIT_3G
  597. help
  598. Select the desired split between kernel and user memory.
  599. If you are not absolutely sure what you are doing, leave this
  600. option alone!
  601. config VMSPLIT_3G
  602. bool "3G/1G user/kernel split"
  603. config VMSPLIT_2G
  604. bool "2G/2G user/kernel split"
  605. config VMSPLIT_1G
  606. bool "1G/3G user/kernel split"
  607. endchoice
  608. config PAGE_OFFSET
  609. hex
  610. default 0x40000000 if VMSPLIT_1G
  611. default 0x80000000 if VMSPLIT_2G
  612. default 0xC0000000
  613. config NR_CPUS
  614. int "Maximum number of CPUs (2-32)"
  615. range 2 32
  616. depends on SMP
  617. default "4"
  618. config HOTPLUG_CPU
  619. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  620. depends on SMP && HOTPLUG && EXPERIMENTAL
  621. help
  622. Say Y here to experiment with turning CPUs off and on. CPUs
  623. can be controlled through /sys/devices/system/cpu.
  624. config LOCAL_TIMERS
  625. bool "Use local timer interrupts"
  626. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  627. default y
  628. help
  629. Enable support for local timers on SMP platforms, rather then the
  630. legacy IPI broadcast method. Local timers allows the system
  631. accounting to be spread across the timer interval, preventing a
  632. "thundering herd" at every timer tick.
  633. config PREEMPT
  634. bool "Preemptible Kernel (EXPERIMENTAL)"
  635. depends on EXPERIMENTAL
  636. help
  637. This option reduces the latency of the kernel when reacting to
  638. real-time or interactive events by allowing a low priority process to
  639. be preempted even if it is in kernel mode executing a system call.
  640. This allows applications to run more reliably even when the system is
  641. under load.
  642. Say Y here if you are building a kernel for a desktop, embedded
  643. or real-time system. Say N if you are unsure.
  644. config HZ
  645. int
  646. default 128 if ARCH_L7200
  647. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  648. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  649. default AT91_TIMER_HZ if ARCH_AT91
  650. default 100
  651. config AEABI
  652. bool "Use the ARM EABI to compile the kernel"
  653. help
  654. This option allows for the kernel to be compiled using the latest
  655. ARM ABI (aka EABI). This is only useful if you are using a user
  656. space environment that is also compiled with EABI.
  657. Since there are major incompatibilities between the legacy ABI and
  658. EABI, especially with regard to structure member alignment, this
  659. option also changes the kernel syscall calling convention to
  660. disambiguate both ABIs and allow for backward compatibility support
  661. (selected with CONFIG_OABI_COMPAT).
  662. To use this you need GCC version 4.0.0 or later.
  663. config OABI_COMPAT
  664. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  665. depends on AEABI && EXPERIMENTAL
  666. default y
  667. help
  668. This option preserves the old syscall interface along with the
  669. new (ARM EABI) one. It also provides a compatibility layer to
  670. intercept syscalls that have structure arguments which layout
  671. in memory differs between the legacy ABI and the new ARM EABI
  672. (only for non "thumb" binaries). This option adds a tiny
  673. overhead to all syscalls and produces a slightly larger kernel.
  674. If you know you'll be using only pure EABI user space then you
  675. can say N here. If this option is not selected and you attempt
  676. to execute a legacy ABI binary then the result will be
  677. UNPREDICTABLE (in fact it can be predicted that it won't work
  678. at all). If in doubt say Y.
  679. # Discontigmem is deprecated
  680. config ARCH_DISCONTIGMEM_ENABLE
  681. bool
  682. config ARCH_SPARSEMEM_ENABLE
  683. bool
  684. config ARCH_SPARSEMEM_DEFAULT
  685. def_bool ARCH_SPARSEMEM_ENABLE
  686. config ARCH_SELECT_MEMORY_MODEL
  687. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  688. config NODES_SHIFT
  689. int
  690. default "4" if ARCH_LH7A40X
  691. default "2"
  692. depends on NEED_MULTIPLE_NODES
  693. source "mm/Kconfig"
  694. config LEDS
  695. bool "Timer and CPU usage LEDs"
  696. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  697. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  698. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  699. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  700. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  701. ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
  702. ARCH_KS8695 || MACH_RD88F5182
  703. help
  704. If you say Y here, the LEDs on your machine will be used
  705. to provide useful information about your current system status.
  706. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  707. be able to select which LEDs are active using the options below. If
  708. you are compiling a kernel for the EBSA-110 or the LART however, the
  709. red LED will simply flash regularly to indicate that the system is
  710. still functional. It is safe to say Y here if you have a CATS
  711. system, but the driver will do nothing.
  712. config LEDS_TIMER
  713. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  714. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  715. || MACH_OMAP_PERSEUS2
  716. depends on LEDS
  717. depends on !GENERIC_CLOCKEVENTS
  718. default y if ARCH_EBSA110
  719. help
  720. If you say Y here, one of the system LEDs (the green one on the
  721. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  722. will flash regularly to indicate that the system is still
  723. operational. This is mainly useful to kernel hackers who are
  724. debugging unstable kernels.
  725. The LART uses the same LED for both Timer LED and CPU usage LED
  726. functions. You may choose to use both, but the Timer LED function
  727. will overrule the CPU usage LED.
  728. config LEDS_CPU
  729. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  730. !ARCH_OMAP) \
  731. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  732. || MACH_OMAP_PERSEUS2
  733. depends on LEDS
  734. help
  735. If you say Y here, the red LED will be used to give a good real
  736. time indication of CPU usage, by lighting whenever the idle task
  737. is not currently executing.
  738. The LART uses the same LED for both Timer LED and CPU usage LED
  739. functions. You may choose to use both, but the Timer LED function
  740. will overrule the CPU usage LED.
  741. config ALIGNMENT_TRAP
  742. bool
  743. depends on CPU_CP15_MMU
  744. default y if !ARCH_EBSA110
  745. help
  746. ARM processors cannot fetch/store information which is not
  747. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  748. address divisible by 4. On 32-bit ARM processors, these non-aligned
  749. fetch/store instructions will be emulated in software if you say
  750. here, which has a severe performance impact. This is necessary for
  751. correct operation of some network protocols. With an IP-only
  752. configuration it is safe to say N, otherwise say Y.
  753. endmenu
  754. menu "Boot options"
  755. # Compressed boot loader in ROM. Yes, we really want to ask about
  756. # TEXT and BSS so we preserve their values in the config files.
  757. config ZBOOT_ROM_TEXT
  758. hex "Compressed ROM boot loader base address"
  759. default "0"
  760. help
  761. The physical address at which the ROM-able zImage is to be
  762. placed in the target. Platforms which normally make use of
  763. ROM-able zImage formats normally set this to a suitable
  764. value in their defconfig file.
  765. If ZBOOT_ROM is not enabled, this has no effect.
  766. config ZBOOT_ROM_BSS
  767. hex "Compressed ROM boot loader BSS address"
  768. default "0"
  769. help
  770. The base address of an area of read/write memory in the target
  771. for the ROM-able zImage which must be available while the
  772. decompressor is running. It must be large enough to hold the
  773. entire decompressed kernel plus an additional 128 KiB.
  774. Platforms which normally make use of ROM-able zImage formats
  775. normally set this to a suitable value in their defconfig file.
  776. If ZBOOT_ROM is not enabled, this has no effect.
  777. config ZBOOT_ROM
  778. bool "Compressed boot loader in ROM/flash"
  779. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  780. help
  781. Say Y here if you intend to execute your compressed kernel image
  782. (zImage) directly from ROM or flash. If unsure, say N.
  783. config CMDLINE
  784. string "Default kernel command string"
  785. default ""
  786. help
  787. On some architectures (EBSA110 and CATS), there is currently no way
  788. for the boot loader to pass arguments to the kernel. For these
  789. architectures, you should supply some command-line options at build
  790. time by entering them here. As a minimum, you should specify the
  791. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  792. config XIP_KERNEL
  793. bool "Kernel Execute-In-Place from ROM"
  794. depends on !ZBOOT_ROM
  795. help
  796. Execute-In-Place allows the kernel to run from non-volatile storage
  797. directly addressable by the CPU, such as NOR flash. This saves RAM
  798. space since the text section of the kernel is not loaded from flash
  799. to RAM. Read-write sections, such as the data section and stack,
  800. are still copied to RAM. The XIP kernel is not compressed since
  801. it has to run directly from flash, so it will take more space to
  802. store it. The flash address used to link the kernel object files,
  803. and for storing it, is configuration dependent. Therefore, if you
  804. say Y here, you must know the proper physical address where to
  805. store the kernel image depending on your own flash memory usage.
  806. Also note that the make target becomes "make xipImage" rather than
  807. "make zImage" or "make Image". The final kernel binary to put in
  808. ROM memory will be arch/arm/boot/xipImage.
  809. If unsure, say N.
  810. config XIP_PHYS_ADDR
  811. hex "XIP Kernel Physical Location"
  812. depends on XIP_KERNEL
  813. default "0x00080000"
  814. help
  815. This is the physical address in your flash memory the kernel will
  816. be linked for and stored to. This address is dependent on your
  817. own flash usage.
  818. config KEXEC
  819. bool "Kexec system call (EXPERIMENTAL)"
  820. depends on EXPERIMENTAL
  821. help
  822. kexec is a system call that implements the ability to shutdown your
  823. current kernel, and to start another kernel. It is like a reboot
  824. but it is independent of the system firmware. And like a reboot
  825. you can start any kernel with it, not just Linux.
  826. It is an ongoing process to be certain the hardware in a machine
  827. is properly shutdown, so do not be surprised if this code does not
  828. initially work for you. It may help to enable device hotplugging
  829. support.
  830. config ATAGS_PROC
  831. bool "Export atags in procfs"
  832. depends on KEXEC
  833. default y
  834. help
  835. Should the atags used to boot the kernel be exported in an "atags"
  836. file in procfs. Useful with kexec.
  837. endmenu
  838. menu "CPU Power Management"
  839. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
  840. source "drivers/cpufreq/Kconfig"
  841. config CPU_FREQ_SA1100
  842. bool
  843. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  844. default y
  845. config CPU_FREQ_SA1110
  846. bool
  847. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  848. default y
  849. config CPU_FREQ_INTEGRATOR
  850. tristate "CPUfreq driver for ARM Integrator CPUs"
  851. depends on ARCH_INTEGRATOR && CPU_FREQ
  852. default y
  853. help
  854. This enables the CPUfreq driver for ARM Integrator CPUs.
  855. For details, take a look at <file:Documentation/cpu-freq>.
  856. If in doubt, say Y.
  857. config CPU_FREQ_IMX
  858. tristate "CPUfreq driver for i.MX CPUs"
  859. depends on ARCH_IMX && CPU_FREQ
  860. default n
  861. help
  862. This enables the CPUfreq driver for i.MX CPUs.
  863. If in doubt, say N.
  864. config CPU_FREQ_PXA
  865. bool
  866. depends on CPU_FREQ && ARCH_PXA && PXA25x
  867. default y
  868. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  869. endif
  870. source "drivers/cpuidle/Kconfig"
  871. endmenu
  872. menu "Floating point emulation"
  873. comment "At least one emulation must be selected"
  874. config FPE_NWFPE
  875. bool "NWFPE math emulation"
  876. depends on !AEABI || OABI_COMPAT
  877. ---help---
  878. Say Y to include the NWFPE floating point emulator in the kernel.
  879. This is necessary to run most binaries. Linux does not currently
  880. support floating point hardware so you need to say Y here even if
  881. your machine has an FPA or floating point co-processor podule.
  882. You may say N here if you are going to load the Acorn FPEmulator
  883. early in the bootup.
  884. config FPE_NWFPE_XP
  885. bool "Support extended precision"
  886. depends on FPE_NWFPE
  887. help
  888. Say Y to include 80-bit support in the kernel floating-point
  889. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  890. Note that gcc does not generate 80-bit operations by default,
  891. so in most cases this option only enlarges the size of the
  892. floating point emulator without any good reason.
  893. You almost surely want to say N here.
  894. config FPE_FASTFPE
  895. bool "FastFPE math emulation (EXPERIMENTAL)"
  896. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  897. ---help---
  898. Say Y here to include the FAST floating point emulator in the kernel.
  899. This is an experimental much faster emulator which now also has full
  900. precision for the mantissa. It does not support any exceptions.
  901. It is very simple, and approximately 3-6 times faster than NWFPE.
  902. It should be sufficient for most programs. It may be not suitable
  903. for scientific calculations, but you have to check this for yourself.
  904. If you do not feel you need a faster FP emulation you should better
  905. choose NWFPE.
  906. config VFP
  907. bool "VFP-format floating point maths"
  908. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  909. help
  910. Say Y to include VFP support code in the kernel. This is needed
  911. if your hardware includes a VFP unit.
  912. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  913. release notes and additional status information.
  914. Say N if your target does not have VFP hardware.
  915. config VFPv3
  916. bool
  917. depends on VFP
  918. default y if CPU_V7
  919. config NEON
  920. bool "Advanced SIMD (NEON) Extension support"
  921. depends on VFPv3 && CPU_V7
  922. help
  923. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  924. Extension.
  925. endmenu
  926. menu "Userspace binary formats"
  927. source "fs/Kconfig.binfmt"
  928. config ARTHUR
  929. tristate "RISC OS personality"
  930. depends on !AEABI
  931. help
  932. Say Y here to include the kernel code necessary if you want to run
  933. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  934. experimental; if this sounds frightening, say N and sleep in peace.
  935. You can also say M here to compile this support as a module (which
  936. will be called arthur).
  937. endmenu
  938. menu "Power management options"
  939. source "kernel/power/Kconfig"
  940. config ARCH_SUSPEND_POSSIBLE
  941. def_bool y
  942. endmenu
  943. source "net/Kconfig"
  944. menu "Device Drivers"
  945. source "drivers/base/Kconfig"
  946. source "drivers/connector/Kconfig"
  947. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  948. source "drivers/mtd/Kconfig"
  949. endif
  950. source "drivers/parport/Kconfig"
  951. source "drivers/pnp/Kconfig"
  952. source "drivers/block/Kconfig"
  953. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  954. source "drivers/misc/Kconfig"
  955. source "drivers/ide/Kconfig"
  956. source "drivers/scsi/Kconfig"
  957. source "drivers/ata/Kconfig"
  958. source "drivers/md/Kconfig"
  959. source "drivers/message/fusion/Kconfig"
  960. source "drivers/ieee1394/Kconfig"
  961. source "drivers/message/i2o/Kconfig"
  962. source "drivers/net/Kconfig"
  963. source "drivers/isdn/Kconfig"
  964. # input before char - char/joystick depends on it. As does USB.
  965. source "drivers/input/Kconfig"
  966. source "drivers/char/Kconfig"
  967. source "drivers/i2c/Kconfig"
  968. source "drivers/spi/Kconfig"
  969. source "drivers/gpio/Kconfig"
  970. source "drivers/w1/Kconfig"
  971. source "drivers/power/Kconfig"
  972. source "drivers/hwmon/Kconfig"
  973. source "drivers/thermal/Kconfig"
  974. source "drivers/watchdog/Kconfig"
  975. source "drivers/ssb/Kconfig"
  976. #source "drivers/l3/Kconfig"
  977. source "drivers/mfd/Kconfig"
  978. source "drivers/media/Kconfig"
  979. source "drivers/video/Kconfig"
  980. source "sound/Kconfig"
  981. source "drivers/hid/Kconfig"
  982. source "drivers/usb/Kconfig"
  983. source "drivers/mmc/Kconfig"
  984. source "drivers/memstick/Kconfig"
  985. source "drivers/accessibility/Kconfig"
  986. source "drivers/leds/Kconfig"
  987. source "drivers/rtc/Kconfig"
  988. source "drivers/dma/Kconfig"
  989. source "drivers/dca/Kconfig"
  990. source "drivers/auxdisplay/Kconfig"
  991. source "drivers/regulator/Kconfig"
  992. source "drivers/uio/Kconfig"
  993. endmenu
  994. source "fs/Kconfig"
  995. source "arch/arm/Kconfig.debug"
  996. source "security/Kconfig"
  997. source "crypto/Kconfig"
  998. source "lib/Kconfig"