Kconfig 40 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_FUNCTION_TRACER if (!XIP_KERNEL)
  18. select HAVE_GENERIC_DMA_COHERENT
  19. select HAVE_KERNEL_GZIP
  20. select HAVE_KERNEL_LZO
  21. help
  22. The ARM series is a line of low-power-consumption RISC chip designs
  23. licensed by ARM Ltd and targeted at embedded applications and
  24. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  25. manufactured, but legacy ARM-based PC hardware remains popular in
  26. Europe. There is an ARM Linux project with a web page at
  27. <http://www.arm.linux.org.uk/>.
  28. config HAVE_PWM
  29. bool
  30. config SYS_SUPPORTS_APM_EMULATION
  31. bool
  32. config GENERIC_GPIO
  33. bool
  34. config GENERIC_TIME
  35. bool
  36. config GENERIC_CLOCKEVENTS
  37. bool
  38. config GENERIC_CLOCKEVENTS_BROADCAST
  39. bool
  40. depends on GENERIC_CLOCKEVENTS
  41. default y if SMP && !LOCAL_TIMERS
  42. config HAVE_TCM
  43. bool
  44. select GENERIC_ALLOCATOR
  45. config NO_IOPORT
  46. bool
  47. config EISA
  48. bool
  49. ---help---
  50. The Extended Industry Standard Architecture (EISA) bus was
  51. developed as an open alternative to the IBM MicroChannel bus.
  52. The EISA bus provided some of the features of the IBM MicroChannel
  53. bus while maintaining backward compatibility with cards made for
  54. the older ISA bus. The EISA bus saw limited use between 1988 and
  55. 1995 when it was made obsolete by the PCI bus.
  56. Say Y here if you are building a kernel for an EISA-based machine.
  57. Otherwise, say N.
  58. config SBUS
  59. bool
  60. config MCA
  61. bool
  62. help
  63. MicroChannel Architecture is found in some IBM PS/2 machines and
  64. laptops. It is a bus system similar to PCI or ISA. See
  65. <file:Documentation/mca.txt> (and especially the web page given
  66. there) before attempting to build an MCA bus kernel.
  67. config GENERIC_HARDIRQS
  68. bool
  69. default y
  70. config STACKTRACE_SUPPORT
  71. bool
  72. default y
  73. config HAVE_LATENCYTOP_SUPPORT
  74. bool
  75. depends on !SMP
  76. default y
  77. config LOCKDEP_SUPPORT
  78. bool
  79. default y
  80. config TRACE_IRQFLAGS_SUPPORT
  81. bool
  82. default y
  83. config HARDIRQS_SW_RESEND
  84. bool
  85. default y
  86. config GENERIC_IRQ_PROBE
  87. bool
  88. default y
  89. config GENERIC_LOCKBREAK
  90. bool
  91. default y
  92. depends on SMP && PREEMPT
  93. config RWSEM_GENERIC_SPINLOCK
  94. bool
  95. default y
  96. config RWSEM_XCHGADD_ALGORITHM
  97. bool
  98. config ARCH_HAS_ILOG2_U32
  99. bool
  100. config ARCH_HAS_ILOG2_U64
  101. bool
  102. config ARCH_HAS_CPUFREQ
  103. bool
  104. help
  105. Internal node to signify that the ARCH has CPUFREQ support
  106. and that the relevant menu configurations are displayed for
  107. it.
  108. config GENERIC_HWEIGHT
  109. bool
  110. default y
  111. config GENERIC_CALIBRATE_DELAY
  112. bool
  113. default y
  114. config ARCH_MAY_HAVE_PC_FDC
  115. bool
  116. config ZONE_DMA
  117. bool
  118. config GENERIC_ISA_DMA
  119. bool
  120. config FIQ
  121. bool
  122. config ARCH_MTD_XIP
  123. bool
  124. config GENERIC_HARDIRQS_NO__DO_IRQ
  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. config MMU
  153. bool "MMU-based Paged Memory Management Support"
  154. default y
  155. help
  156. Select if you want MMU-based virtualised addressing space
  157. support by paged memory management. If unsure, say 'Y'.
  158. choice
  159. prompt "ARM system type"
  160. default ARCH_VERSATILE
  161. config ARCH_AAEC2000
  162. bool "Agilent AAEC-2000 based"
  163. select CPU_ARM920T
  164. select ARM_AMBA
  165. select HAVE_CLK
  166. help
  167. This enables support for systems based on the Agilent AAEC-2000
  168. config ARCH_INTEGRATOR
  169. bool "ARM Ltd. Integrator family"
  170. select ARM_AMBA
  171. select ARCH_HAS_CPUFREQ
  172. select HAVE_CLK
  173. select COMMON_CLKDEV
  174. select ICST525
  175. help
  176. Support for ARM's Integrator platform.
  177. config ARCH_REALVIEW
  178. bool "ARM Ltd. RealView family"
  179. select ARM_AMBA
  180. select HAVE_CLK
  181. select COMMON_CLKDEV
  182. select ICST307
  183. select GENERIC_TIME
  184. select GENERIC_CLOCKEVENTS
  185. select ARCH_WANT_OPTIONAL_GPIOLIB
  186. help
  187. This enables support for ARM Ltd RealView boards.
  188. config ARCH_VERSATILE
  189. bool "ARM Ltd. Versatile family"
  190. select ARM_AMBA
  191. select ARM_VIC
  192. select HAVE_CLK
  193. select COMMON_CLKDEV
  194. select ICST307
  195. select GENERIC_TIME
  196. select GENERIC_CLOCKEVENTS
  197. select ARCH_WANT_OPTIONAL_GPIOLIB
  198. help
  199. This enables support for ARM Ltd Versatile board.
  200. config ARCH_AT91
  201. bool "Atmel AT91"
  202. select GENERIC_GPIO
  203. select ARCH_REQUIRE_GPIOLIB
  204. select HAVE_CLK
  205. help
  206. This enables support for systems based on the Atmel AT91RM9200,
  207. AT91SAM9 and AT91CAP9 processors.
  208. config ARCH_CLPS711X
  209. bool "Cirrus Logic CLPS711x/EP721x-based"
  210. select CPU_ARM720T
  211. help
  212. Support for Cirrus Logic 711x/721x based boards.
  213. config ARCH_GEMINI
  214. bool "Cortina Systems Gemini"
  215. select CPU_FA526
  216. select GENERIC_GPIO
  217. select ARCH_REQUIRE_GPIOLIB
  218. help
  219. Support for the Cortina Systems Gemini family SoCs
  220. config ARCH_EBSA110
  221. bool "EBSA-110"
  222. select CPU_SA110
  223. select ISA
  224. select NO_IOPORT
  225. help
  226. This is an evaluation board for the StrongARM processor available
  227. from Digital. It has limited hardware on-board, including an
  228. Ethernet interface, two PCMCIA sockets, two serial ports and a
  229. parallel port.
  230. config ARCH_EP93XX
  231. bool "EP93xx-based"
  232. select CPU_ARM920T
  233. select ARM_AMBA
  234. select ARM_VIC
  235. select GENERIC_GPIO
  236. select HAVE_CLK
  237. select COMMON_CLKDEV
  238. select ARCH_REQUIRE_GPIOLIB
  239. select ARCH_HAS_HOLES_MEMORYMODEL
  240. help
  241. This enables support for the Cirrus EP93xx series of CPUs.
  242. config ARCH_FOOTBRIDGE
  243. bool "FootBridge"
  244. select CPU_SA110
  245. select FOOTBRIDGE
  246. help
  247. Support for systems based on the DC21285 companion chip
  248. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  249. config ARCH_MXC
  250. bool "Freescale MXC/iMX-based"
  251. select GENERIC_TIME
  252. select GENERIC_CLOCKEVENTS
  253. select ARCH_MTD_XIP
  254. select GENERIC_GPIO
  255. select ARCH_REQUIRE_GPIOLIB
  256. select HAVE_CLK
  257. help
  258. Support for Freescale MXC/iMX-based family of processors
  259. config ARCH_STMP3XXX
  260. bool "Freescale STMP3xxx"
  261. select CPU_ARM926T
  262. select HAVE_CLK
  263. select COMMON_CLKDEV
  264. select ARCH_REQUIRE_GPIOLIB
  265. select GENERIC_TIME
  266. select GENERIC_CLOCKEVENTS
  267. select GENERIC_GPIO
  268. select USB_ARCH_HAS_EHCI
  269. help
  270. Support for systems based on the Freescale 3xxx CPUs.
  271. config ARCH_NETX
  272. bool "Hilscher NetX based"
  273. select CPU_ARM926T
  274. select ARM_VIC
  275. select GENERIC_CLOCKEVENTS
  276. select GENERIC_TIME
  277. help
  278. This enables support for systems based on the Hilscher NetX Soc
  279. config ARCH_H720X
  280. bool "Hynix HMS720x-based"
  281. select CPU_ARM720T
  282. select ISA_DMA_API
  283. help
  284. This enables support for systems based on the Hynix HMS720x
  285. config ARCH_NOMADIK
  286. bool "STMicroelectronics Nomadik"
  287. select ARM_AMBA
  288. select ARM_VIC
  289. select CPU_ARM926T
  290. select HAVE_CLK
  291. select COMMON_CLKDEV
  292. select GENERIC_TIME
  293. select GENERIC_CLOCKEVENTS
  294. select GENERIC_GPIO
  295. select ARCH_REQUIRE_GPIOLIB
  296. help
  297. Support for the Nomadik platform by ST-Ericsson
  298. config ARCH_IOP13XX
  299. bool "IOP13xx-based"
  300. depends on MMU
  301. select CPU_XSC3
  302. select PLAT_IOP
  303. select PCI
  304. select ARCH_SUPPORTS_MSI
  305. select VMSPLIT_1G
  306. help
  307. Support for Intel's IOP13XX (XScale) family of processors.
  308. config ARCH_IOP32X
  309. bool "IOP32x-based"
  310. depends on MMU
  311. select CPU_XSCALE
  312. select PLAT_IOP
  313. select PCI
  314. select GENERIC_GPIO
  315. select ARCH_REQUIRE_GPIOLIB
  316. help
  317. Support for Intel's 80219 and IOP32X (XScale) family of
  318. processors.
  319. config ARCH_IOP33X
  320. bool "IOP33x-based"
  321. depends on MMU
  322. select CPU_XSCALE
  323. select PLAT_IOP
  324. select PCI
  325. select GENERIC_GPIO
  326. select ARCH_REQUIRE_GPIOLIB
  327. help
  328. Support for Intel's IOP33X (XScale) family of processors.
  329. config ARCH_IXP23XX
  330. bool "IXP23XX-based"
  331. depends on MMU
  332. select CPU_XSC3
  333. select PCI
  334. help
  335. Support for Intel's IXP23xx (XScale) family of processors.
  336. config ARCH_IXP2000
  337. bool "IXP2400/2800-based"
  338. depends on MMU
  339. select CPU_XSCALE
  340. select PCI
  341. help
  342. Support for Intel's IXP2400/2800 (XScale) family of processors.
  343. config ARCH_IXP4XX
  344. bool "IXP4xx-based"
  345. depends on MMU
  346. select CPU_XSCALE
  347. select GENERIC_GPIO
  348. select GENERIC_TIME
  349. select GENERIC_CLOCKEVENTS
  350. select DMABOUNCE if PCI
  351. help
  352. Support for Intel's IXP4XX (XScale) family of processors.
  353. config ARCH_L7200
  354. bool "LinkUp-L7200"
  355. select CPU_ARM720T
  356. select FIQ
  357. help
  358. Say Y here if you intend to run this kernel on a LinkUp Systems
  359. L7200 Software Development Board which uses an ARM720T processor.
  360. Information on this board can be obtained at:
  361. <http://www.linkupsys.com/>
  362. If you have any questions or comments about the Linux kernel port
  363. to this board, send e-mail to <sjhill@cotw.com>.
  364. config ARCH_DOVE
  365. bool "Marvell Dove"
  366. select PCI
  367. select GENERIC_GPIO
  368. select ARCH_REQUIRE_GPIOLIB
  369. select GENERIC_TIME
  370. select GENERIC_CLOCKEVENTS
  371. select PLAT_ORION
  372. help
  373. Support for the Marvell Dove SoC 88AP510
  374. config ARCH_KIRKWOOD
  375. bool "Marvell Kirkwood"
  376. select CPU_FEROCEON
  377. select PCI
  378. select GENERIC_GPIO
  379. select ARCH_REQUIRE_GPIOLIB
  380. select GENERIC_TIME
  381. select GENERIC_CLOCKEVENTS
  382. select PLAT_ORION
  383. help
  384. Support for the following Marvell Kirkwood series SoCs:
  385. 88F6180, 88F6192 and 88F6281.
  386. config ARCH_LOKI
  387. bool "Marvell Loki (88RC8480)"
  388. select CPU_FEROCEON
  389. select GENERIC_TIME
  390. select GENERIC_CLOCKEVENTS
  391. select PLAT_ORION
  392. help
  393. Support for the Marvell Loki (88RC8480) SoC.
  394. config ARCH_MV78XX0
  395. bool "Marvell MV78xx0"
  396. select CPU_FEROCEON
  397. select PCI
  398. select GENERIC_GPIO
  399. select ARCH_REQUIRE_GPIOLIB
  400. select GENERIC_TIME
  401. select GENERIC_CLOCKEVENTS
  402. select PLAT_ORION
  403. help
  404. Support for the following Marvell MV78xx0 series SoCs:
  405. MV781x0, MV782x0.
  406. config ARCH_ORION5X
  407. bool "Marvell Orion"
  408. depends on MMU
  409. select CPU_FEROCEON
  410. select PCI
  411. select GENERIC_GPIO
  412. select ARCH_REQUIRE_GPIOLIB
  413. select GENERIC_TIME
  414. select GENERIC_CLOCKEVENTS
  415. select PLAT_ORION
  416. help
  417. Support for the following Marvell Orion 5x series SoCs:
  418. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  419. Orion-2 (5281), Orion-1-90 (6183).
  420. config ARCH_MMP
  421. bool "Marvell PXA168/910"
  422. depends on MMU
  423. select GENERIC_GPIO
  424. select ARCH_REQUIRE_GPIOLIB
  425. select HAVE_CLK
  426. select COMMON_CLKDEV
  427. select GENERIC_TIME
  428. select GENERIC_CLOCKEVENTS
  429. select TICK_ONESHOT
  430. select PLAT_PXA
  431. help
  432. Support for Marvell's PXA168/910 processor line.
  433. config ARCH_KS8695
  434. bool "Micrel/Kendin KS8695"
  435. select CPU_ARM922T
  436. select GENERIC_GPIO
  437. select ARCH_REQUIRE_GPIOLIB
  438. help
  439. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  440. System-on-Chip devices.
  441. config ARCH_NS9XXX
  442. bool "NetSilicon NS9xxx"
  443. select CPU_ARM926T
  444. select GENERIC_GPIO
  445. select GENERIC_TIME
  446. select GENERIC_CLOCKEVENTS
  447. select HAVE_CLK
  448. help
  449. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  450. System.
  451. <http://www.digi.com/products/microprocessors/index.jsp>
  452. config ARCH_W90X900
  453. bool "Nuvoton W90X900 CPU"
  454. select CPU_ARM926T
  455. select ARCH_REQUIRE_GPIOLIB
  456. select GENERIC_GPIO
  457. select HAVE_CLK
  458. select COMMON_CLKDEV
  459. select GENERIC_TIME
  460. select GENERIC_CLOCKEVENTS
  461. help
  462. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  463. At present, the w90x900 has been renamed nuc900, regarding
  464. the ARM series product line, you can login the following
  465. link address to know more.
  466. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  467. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  468. config ARCH_PNX4008
  469. bool "Philips Nexperia PNX4008 Mobile"
  470. select CPU_ARM926T
  471. select HAVE_CLK
  472. help
  473. This enables support for Philips PNX4008 mobile platform.
  474. config ARCH_PXA
  475. bool "PXA2xx/PXA3xx-based"
  476. depends on MMU
  477. select ARCH_MTD_XIP
  478. select ARCH_HAS_CPUFREQ
  479. select GENERIC_GPIO
  480. select HAVE_CLK
  481. select COMMON_CLKDEV
  482. select ARCH_REQUIRE_GPIOLIB
  483. select GENERIC_TIME
  484. select GENERIC_CLOCKEVENTS
  485. select TICK_ONESHOT
  486. select PLAT_PXA
  487. help
  488. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  489. config ARCH_MSM
  490. bool "Qualcomm MSM"
  491. select CPU_V6
  492. select GENERIC_TIME
  493. select GENERIC_CLOCKEVENTS
  494. help
  495. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  496. apps processor of the MSM7K and depends on a shared memory
  497. interface to the ARM9 modem processor which runs the baseband stack
  498. and controls some vital subsystems (clock and power control, etc).
  499. config ARCH_RPC
  500. bool "RiscPC"
  501. select ARCH_ACORN
  502. select FIQ
  503. select TIMER_ACORN
  504. select ARCH_MAY_HAVE_PC_FDC
  505. select HAVE_PATA_PLATFORM
  506. select ISA_DMA_API
  507. select NO_IOPORT
  508. select ARCH_SPARSEMEM_ENABLE
  509. help
  510. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  511. CD-ROM interface, serial and parallel port, and the floppy drive.
  512. config ARCH_SA1100
  513. bool "SA1100-based"
  514. select CPU_SA1100
  515. select ISA
  516. select ARCH_SPARSEMEM_ENABLE
  517. select ARCH_MTD_XIP
  518. select ARCH_HAS_CPUFREQ
  519. select CPU_FREQ
  520. select GENERIC_GPIO
  521. select GENERIC_TIME
  522. select GENERIC_CLOCKEVENTS
  523. select HAVE_CLK
  524. select TICK_ONESHOT
  525. select ARCH_REQUIRE_GPIOLIB
  526. help
  527. Support for StrongARM 11x0 based boards.
  528. config ARCH_S3C2410
  529. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  530. select GENERIC_GPIO
  531. select ARCH_HAS_CPUFREQ
  532. select HAVE_CLK
  533. help
  534. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  535. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  536. the Samsung SMDK2410 development board (and derivatives).
  537. config ARCH_S3C64XX
  538. bool "Samsung S3C64XX"
  539. select PLAT_SAMSUNG
  540. select CPU_V6
  541. select GENERIC_GPIO
  542. select ARM_VIC
  543. select HAVE_CLK
  544. select NO_IOPORT
  545. select ARCH_HAS_CPUFREQ
  546. select ARCH_REQUIRE_GPIOLIB
  547. select SAMSUNG_CLKSRC
  548. select SAMSUNG_IRQ_VIC_TIMER
  549. select SAMSUNG_IRQ_UART
  550. select S3C_GPIO_TRACK
  551. select S3C_GPIO_PULL_UPDOWN
  552. select S3C_GPIO_CFG_S3C24XX
  553. select S3C_GPIO_CFG_S3C64XX
  554. select S3C_DEV_NAND
  555. select USB_ARCH_HAS_OHCI
  556. select SAMSUNG_GPIOLIB_4BIT
  557. help
  558. Samsung S3C64XX series based systems
  559. config ARCH_S5P6440
  560. bool "Samsung S5P6440"
  561. select CPU_V6
  562. select GENERIC_GPIO
  563. select HAVE_CLK
  564. help
  565. Samsung S5P6440 CPU based systems
  566. config ARCH_S5PC1XX
  567. bool "Samsung S5PC1XX"
  568. select GENERIC_GPIO
  569. select HAVE_CLK
  570. select CPU_V7
  571. help
  572. Samsung S5PC1XX series based systems
  573. config ARCH_SHARK
  574. bool "Shark"
  575. select CPU_SA110
  576. select ISA
  577. select ISA_DMA
  578. select ZONE_DMA
  579. select PCI
  580. help
  581. Support for the StrongARM based Digital DNARD machine, also known
  582. as "Shark" (<http://www.shark-linux.de/shark.html>).
  583. config ARCH_LH7A40X
  584. bool "Sharp LH7A40X"
  585. select CPU_ARM922T
  586. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  587. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  588. help
  589. Say Y here for systems based on one of the Sharp LH7A40X
  590. System on a Chip processors. These CPUs include an ARM922T
  591. core with a wide array of integrated devices for
  592. hand-held and low-power applications.
  593. config ARCH_U300
  594. bool "ST-Ericsson U300 Series"
  595. depends on MMU
  596. select CPU_ARM926T
  597. select HAVE_TCM
  598. select ARM_AMBA
  599. select ARM_VIC
  600. select GENERIC_TIME
  601. select GENERIC_CLOCKEVENTS
  602. select HAVE_CLK
  603. select COMMON_CLKDEV
  604. select GENERIC_GPIO
  605. help
  606. Support for ST-Ericsson U300 series mobile platforms.
  607. config ARCH_DAVINCI
  608. bool "TI DaVinci"
  609. select CPU_ARM926T
  610. select GENERIC_TIME
  611. select GENERIC_CLOCKEVENTS
  612. select GENERIC_GPIO
  613. select ARCH_REQUIRE_GPIOLIB
  614. select HAVE_CLK
  615. select ZONE_DMA
  616. select HAVE_IDE
  617. select COMMON_CLKDEV
  618. select GENERIC_ALLOCATOR
  619. select ARCH_HAS_HOLES_MEMORYMODEL
  620. help
  621. Support for TI's DaVinci platform.
  622. config ARCH_OMAP
  623. bool "TI OMAP"
  624. select GENERIC_GPIO
  625. select HAVE_CLK
  626. select ARCH_REQUIRE_GPIOLIB
  627. select ARCH_HAS_CPUFREQ
  628. select GENERIC_TIME
  629. select GENERIC_CLOCKEVENTS
  630. help
  631. Support for TI's OMAP platform (OMAP1 and OMAP2).
  632. config ARCH_BCMRING
  633. bool "Broadcom BCMRING"
  634. depends on MMU
  635. select CPU_V6
  636. select ARM_AMBA
  637. select COMMON_CLKDEV
  638. select GENERIC_TIME
  639. select GENERIC_CLOCKEVENTS
  640. select ARCH_WANT_OPTIONAL_GPIOLIB
  641. help
  642. Support for Broadcom's BCMRing platform.
  643. config ARCH_U8500
  644. bool "ST-Ericsson U8500 Series"
  645. select CPU_V7
  646. select ARM_AMBA
  647. select GENERIC_TIME
  648. select GENERIC_CLOCKEVENTS
  649. select COMMON_CLKDEV
  650. help
  651. Support for ST-Ericsson's Ux500 architecture
  652. endchoice
  653. source "arch/arm/mach-clps711x/Kconfig"
  654. source "arch/arm/mach-ep93xx/Kconfig"
  655. source "arch/arm/mach-footbridge/Kconfig"
  656. source "arch/arm/mach-gemini/Kconfig"
  657. source "arch/arm/mach-integrator/Kconfig"
  658. source "arch/arm/mach-iop32x/Kconfig"
  659. source "arch/arm/mach-iop33x/Kconfig"
  660. source "arch/arm/mach-iop13xx/Kconfig"
  661. source "arch/arm/mach-ixp4xx/Kconfig"
  662. source "arch/arm/mach-ixp2000/Kconfig"
  663. source "arch/arm/mach-ixp23xx/Kconfig"
  664. source "arch/arm/mach-loki/Kconfig"
  665. source "arch/arm/mach-mv78xx0/Kconfig"
  666. source "arch/arm/mach-pxa/Kconfig"
  667. source "arch/arm/plat-pxa/Kconfig"
  668. source "arch/arm/mach-mmp/Kconfig"
  669. source "arch/arm/mach-sa1100/Kconfig"
  670. source "arch/arm/plat-omap/Kconfig"
  671. source "arch/arm/mach-omap1/Kconfig"
  672. source "arch/arm/mach-omap2/Kconfig"
  673. source "arch/arm/mach-orion5x/Kconfig"
  674. source "arch/arm/mach-kirkwood/Kconfig"
  675. source "arch/arm/mach-dove/Kconfig"
  676. source "arch/arm/plat-samsung/Kconfig"
  677. source "arch/arm/plat-s3c24xx/Kconfig"
  678. source "arch/arm/plat-s5p/Kconfig"
  679. source "arch/arm/plat-s5pc1xx/Kconfig"
  680. if ARCH_S3C2410
  681. source "arch/arm/mach-s3c2400/Kconfig"
  682. source "arch/arm/mach-s3c2410/Kconfig"
  683. source "arch/arm/mach-s3c2412/Kconfig"
  684. source "arch/arm/mach-s3c2440/Kconfig"
  685. source "arch/arm/mach-s3c2443/Kconfig"
  686. endif
  687. if ARCH_S3C64XX
  688. source "arch/arm/mach-s3c64xx/Kconfig"
  689. endif
  690. source "arch/arm/mach-s5p6440/Kconfig"
  691. source "arch/arm/plat-stmp3xxx/Kconfig"
  692. if ARCH_S5PC1XX
  693. source "arch/arm/mach-s5pc100/Kconfig"
  694. endif
  695. source "arch/arm/mach-lh7a40x/Kconfig"
  696. source "arch/arm/mach-h720x/Kconfig"
  697. source "arch/arm/mach-versatile/Kconfig"
  698. source "arch/arm/mach-aaec2000/Kconfig"
  699. source "arch/arm/mach-realview/Kconfig"
  700. source "arch/arm/mach-at91/Kconfig"
  701. source "arch/arm/plat-mxc/Kconfig"
  702. source "arch/arm/mach-nomadik/Kconfig"
  703. source "arch/arm/plat-nomadik/Kconfig"
  704. source "arch/arm/mach-netx/Kconfig"
  705. source "arch/arm/mach-ns9xxx/Kconfig"
  706. source "arch/arm/mach-davinci/Kconfig"
  707. source "arch/arm/mach-ks8695/Kconfig"
  708. source "arch/arm/mach-msm/Kconfig"
  709. source "arch/arm/mach-u300/Kconfig"
  710. source "arch/arm/mach-w90x900/Kconfig"
  711. source "arch/arm/mach-bcmring/Kconfig"
  712. source "arch/arm/mach-ux500/Kconfig"
  713. # Definitions to make life easier
  714. config ARCH_ACORN
  715. bool
  716. config PLAT_IOP
  717. bool
  718. select GENERIC_CLOCKEVENTS
  719. select GENERIC_TIME
  720. config PLAT_ORION
  721. bool
  722. config PLAT_PXA
  723. bool
  724. source arch/arm/mm/Kconfig
  725. config IWMMXT
  726. bool "Enable iWMMXt support"
  727. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  728. default y if PXA27x || PXA3xx || ARCH_MMP
  729. help
  730. Enable support for iWMMXt context switching at run time if
  731. running on a CPU that supports it.
  732. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  733. config XSCALE_PMU
  734. bool
  735. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  736. default y
  737. if !MMU
  738. source "arch/arm/Kconfig-nommu"
  739. endif
  740. config ARM_ERRATA_411920
  741. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  742. depends on CPU_V6 && !SMP
  743. help
  744. Invalidation of the Instruction Cache operation can
  745. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  746. It does not affect the MPCore. This option enables the ARM Ltd.
  747. recommended workaround.
  748. config ARM_ERRATA_430973
  749. bool "ARM errata: Stale prediction on replaced interworking branch"
  750. depends on CPU_V7
  751. help
  752. This option enables the workaround for the 430973 Cortex-A8
  753. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  754. interworking branch is replaced with another code sequence at the
  755. same virtual address, whether due to self-modifying code or virtual
  756. to physical address re-mapping, Cortex-A8 does not recover from the
  757. stale interworking branch prediction. This results in Cortex-A8
  758. executing the new code sequence in the incorrect ARM or Thumb state.
  759. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  760. and also flushes the branch target cache at every context switch.
  761. Note that setting specific bits in the ACTLR register may not be
  762. available in non-secure mode.
  763. config ARM_ERRATA_458693
  764. bool "ARM errata: Processor deadlock when a false hazard is created"
  765. depends on CPU_V7
  766. help
  767. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  768. erratum. For very specific sequences of memory operations, it is
  769. possible for a hazard condition intended for a cache line to instead
  770. be incorrectly associated with a different cache line. This false
  771. hazard might then cause a processor deadlock. The workaround enables
  772. the L1 caching of the NEON accesses and disables the PLD instruction
  773. in the ACTLR register. Note that setting specific bits in the ACTLR
  774. register may not be available in non-secure mode.
  775. config ARM_ERRATA_460075
  776. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  777. depends on CPU_V7
  778. help
  779. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  780. erratum. Any asynchronous access to the L2 cache may encounter a
  781. situation in which recent store transactions to the L2 cache are lost
  782. and overwritten with stale memory contents from external memory. The
  783. workaround disables the write-allocate mode for the L2 cache via the
  784. ACTLR register. Note that setting specific bits in the ACTLR register
  785. may not be available in non-secure mode.
  786. endmenu
  787. source "arch/arm/common/Kconfig"
  788. config FORCE_MAX_ZONEORDER
  789. int
  790. depends on SA1111
  791. default "9"
  792. menu "Bus support"
  793. config ARM_AMBA
  794. bool
  795. config ISA
  796. bool
  797. help
  798. Find out whether you have ISA slots on your motherboard. ISA is the
  799. name of a bus system, i.e. the way the CPU talks to the other stuff
  800. inside your box. Other bus systems are PCI, EISA, MicroChannel
  801. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  802. newer boards don't support it. If you have ISA, say Y, otherwise N.
  803. # Select ISA DMA controller support
  804. config ISA_DMA
  805. bool
  806. select ISA_DMA_API
  807. # Select ISA DMA interface
  808. config ISA_DMA_API
  809. bool
  810. config PCI
  811. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  812. help
  813. Find out whether you have a PCI motherboard. PCI is the name of a
  814. bus system, i.e. the way the CPU talks to the other stuff inside
  815. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  816. VESA. If you have PCI, say Y, otherwise N.
  817. config PCI_SYSCALL
  818. def_bool PCI
  819. # Select the host bridge type
  820. config PCI_HOST_VIA82C505
  821. bool
  822. depends on PCI && ARCH_SHARK
  823. default y
  824. config PCI_HOST_ITE8152
  825. bool
  826. depends on PCI && MACH_ARMCORE
  827. default y
  828. select DMABOUNCE
  829. source "drivers/pci/Kconfig"
  830. source "drivers/pcmcia/Kconfig"
  831. endmenu
  832. menu "Kernel Features"
  833. source "kernel/time/Kconfig"
  834. config SMP
  835. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  836. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  837. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  838. depends on GENERIC_CLOCKEVENTS
  839. select USE_GENERIC_SMP_HELPERS
  840. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  841. help
  842. This enables support for systems with more than one CPU. If you have
  843. a system with only one CPU, like most personal computers, say N. If
  844. you have a system with more than one CPU, say Y.
  845. If you say N here, the kernel will run on single and multiprocessor
  846. machines, but will use only one CPU of a multiprocessor machine. If
  847. you say Y here, the kernel will run on many, but not all, single
  848. processor machines. On a single processor machine, the kernel will
  849. run faster if you say N here.
  850. See also <file:Documentation/i386/IO-APIC.txt>,
  851. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  852. <http://www.linuxdoc.org/docs.html#howto>.
  853. If you don't know what to do here, say N.
  854. config HAVE_ARM_SCU
  855. bool
  856. depends on SMP
  857. help
  858. This option enables support for the ARM system coherency unit
  859. config HAVE_ARM_TWD
  860. bool
  861. depends on SMP
  862. help
  863. This options enables support for the ARM timer and watchdog unit
  864. choice
  865. prompt "Memory split"
  866. default VMSPLIT_3G
  867. help
  868. Select the desired split between kernel and user memory.
  869. If you are not absolutely sure what you are doing, leave this
  870. option alone!
  871. config VMSPLIT_3G
  872. bool "3G/1G user/kernel split"
  873. config VMSPLIT_2G
  874. bool "2G/2G user/kernel split"
  875. config VMSPLIT_1G
  876. bool "1G/3G user/kernel split"
  877. endchoice
  878. config PAGE_OFFSET
  879. hex
  880. default 0x40000000 if VMSPLIT_1G
  881. default 0x80000000 if VMSPLIT_2G
  882. default 0xC0000000
  883. config NR_CPUS
  884. int "Maximum number of CPUs (2-32)"
  885. range 2 32
  886. depends on SMP
  887. default "4"
  888. config HOTPLUG_CPU
  889. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  890. depends on SMP && HOTPLUG && EXPERIMENTAL
  891. help
  892. Say Y here to experiment with turning CPUs off and on. CPUs
  893. can be controlled through /sys/devices/system/cpu.
  894. config LOCAL_TIMERS
  895. bool "Use local timer interrupts"
  896. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  897. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  898. default y
  899. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  900. help
  901. Enable support for local timers on SMP platforms, rather then the
  902. legacy IPI broadcast method. Local timers allows the system
  903. accounting to be spread across the timer interval, preventing a
  904. "thundering herd" at every timer tick.
  905. source kernel/Kconfig.preempt
  906. config HZ
  907. int
  908. default 128 if ARCH_L7200
  909. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440
  910. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  911. default AT91_TIMER_HZ if ARCH_AT91
  912. default 100
  913. config THUMB2_KERNEL
  914. bool "Compile the kernel in Thumb-2 mode"
  915. depends on CPU_V7 && EXPERIMENTAL
  916. select AEABI
  917. select ARM_ASM_UNIFIED
  918. help
  919. By enabling this option, the kernel will be compiled in
  920. Thumb-2 mode. A compiler/assembler that understand the unified
  921. ARM-Thumb syntax is needed.
  922. If unsure, say N.
  923. config ARM_ASM_UNIFIED
  924. bool
  925. config AEABI
  926. bool "Use the ARM EABI to compile the kernel"
  927. help
  928. This option allows for the kernel to be compiled using the latest
  929. ARM ABI (aka EABI). This is only useful if you are using a user
  930. space environment that is also compiled with EABI.
  931. Since there are major incompatibilities between the legacy ABI and
  932. EABI, especially with regard to structure member alignment, this
  933. option also changes the kernel syscall calling convention to
  934. disambiguate both ABIs and allow for backward compatibility support
  935. (selected with CONFIG_OABI_COMPAT).
  936. To use this you need GCC version 4.0.0 or later.
  937. config OABI_COMPAT
  938. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  939. depends on AEABI && EXPERIMENTAL
  940. default y
  941. help
  942. This option preserves the old syscall interface along with the
  943. new (ARM EABI) one. It also provides a compatibility layer to
  944. intercept syscalls that have structure arguments which layout
  945. in memory differs between the legacy ABI and the new ARM EABI
  946. (only for non "thumb" binaries). This option adds a tiny
  947. overhead to all syscalls and produces a slightly larger kernel.
  948. If you know you'll be using only pure EABI user space then you
  949. can say N here. If this option is not selected and you attempt
  950. to execute a legacy ABI binary then the result will be
  951. UNPREDICTABLE (in fact it can be predicted that it won't work
  952. at all). If in doubt say Y.
  953. config ARCH_HAS_HOLES_MEMORYMODEL
  954. bool
  955. # Discontigmem is deprecated
  956. config ARCH_DISCONTIGMEM_ENABLE
  957. bool
  958. config ARCH_SPARSEMEM_ENABLE
  959. bool
  960. config ARCH_SPARSEMEM_DEFAULT
  961. def_bool ARCH_SPARSEMEM_ENABLE
  962. config ARCH_SELECT_MEMORY_MODEL
  963. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  964. config NODES_SHIFT
  965. int
  966. default "4" if ARCH_LH7A40X
  967. default "2"
  968. depends on NEED_MULTIPLE_NODES
  969. config HIGHMEM
  970. bool "High Memory Support (EXPERIMENTAL)"
  971. depends on MMU && EXPERIMENTAL
  972. help
  973. The address space of ARM processors is only 4 Gigabytes large
  974. and it has to accommodate user address space, kernel address
  975. space as well as some memory mapped IO. That means that, if you
  976. have a large amount of physical memory and/or IO, not all of the
  977. memory can be "permanently mapped" by the kernel. The physical
  978. memory that is not permanently mapped is called "high memory".
  979. Depending on the selected kernel/user memory split, minimum
  980. vmalloc space and actual amount of RAM, you may not need this
  981. option which should result in a slightly faster kernel.
  982. If unsure, say n.
  983. config HIGHPTE
  984. bool "Allocate 2nd-level pagetables from highmem"
  985. depends on HIGHMEM
  986. depends on !OUTER_CACHE
  987. source "mm/Kconfig"
  988. config LEDS
  989. bool "Timer and CPU usage LEDs"
  990. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  991. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  992. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  993. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  994. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  995. ARCH_AT91 || ARCH_DAVINCI || \
  996. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  997. help
  998. If you say Y here, the LEDs on your machine will be used
  999. to provide useful information about your current system status.
  1000. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1001. be able to select which LEDs are active using the options below. If
  1002. you are compiling a kernel for the EBSA-110 or the LART however, the
  1003. red LED will simply flash regularly to indicate that the system is
  1004. still functional. It is safe to say Y here if you have a CATS
  1005. system, but the driver will do nothing.
  1006. config LEDS_TIMER
  1007. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1008. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1009. || MACH_OMAP_PERSEUS2
  1010. depends on LEDS
  1011. depends on !GENERIC_CLOCKEVENTS
  1012. default y if ARCH_EBSA110
  1013. help
  1014. If you say Y here, one of the system LEDs (the green one on the
  1015. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1016. will flash regularly to indicate that the system is still
  1017. operational. This is mainly useful to kernel hackers who are
  1018. debugging unstable kernels.
  1019. The LART uses the same LED for both Timer LED and CPU usage LED
  1020. functions. You may choose to use both, but the Timer LED function
  1021. will overrule the CPU usage LED.
  1022. config LEDS_CPU
  1023. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1024. !ARCH_OMAP) \
  1025. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1026. || MACH_OMAP_PERSEUS2
  1027. depends on LEDS
  1028. help
  1029. If you say Y here, the red LED will be used to give a good real
  1030. time indication of CPU usage, by lighting whenever the idle task
  1031. is not currently executing.
  1032. The LART uses the same LED for both Timer LED and CPU usage LED
  1033. functions. You may choose to use both, but the Timer LED function
  1034. will overrule the CPU usage LED.
  1035. config ALIGNMENT_TRAP
  1036. bool
  1037. depends on CPU_CP15_MMU
  1038. default y if !ARCH_EBSA110
  1039. help
  1040. ARM processors cannot fetch/store information which is not
  1041. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1042. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1043. fetch/store instructions will be emulated in software if you say
  1044. here, which has a severe performance impact. This is necessary for
  1045. correct operation of some network protocols. With an IP-only
  1046. configuration it is safe to say N, otherwise say Y.
  1047. config UACCESS_WITH_MEMCPY
  1048. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1049. depends on MMU && EXPERIMENTAL
  1050. default y if CPU_FEROCEON
  1051. help
  1052. Implement faster copy_to_user and clear_user methods for CPU
  1053. cores where a 8-word STM instruction give significantly higher
  1054. memory write throughput than a sequence of individual 32bit stores.
  1055. A possible side effect is a slight increase in scheduling latency
  1056. between threads sharing the same address space if they invoke
  1057. such copy operations with large buffers.
  1058. However, if the CPU data cache is using a write-allocate mode,
  1059. this option is unlikely to provide any performance gain.
  1060. endmenu
  1061. menu "Boot options"
  1062. # Compressed boot loader in ROM. Yes, we really want to ask about
  1063. # TEXT and BSS so we preserve their values in the config files.
  1064. config ZBOOT_ROM_TEXT
  1065. hex "Compressed ROM boot loader base address"
  1066. default "0"
  1067. help
  1068. The physical address at which the ROM-able zImage is to be
  1069. placed in the target. Platforms which normally make use of
  1070. ROM-able zImage formats normally set this to a suitable
  1071. value in their defconfig file.
  1072. If ZBOOT_ROM is not enabled, this has no effect.
  1073. config ZBOOT_ROM_BSS
  1074. hex "Compressed ROM boot loader BSS address"
  1075. default "0"
  1076. help
  1077. The base address of an area of read/write memory in the target
  1078. for the ROM-able zImage which must be available while the
  1079. decompressor is running. It must be large enough to hold the
  1080. entire decompressed kernel plus an additional 128 KiB.
  1081. Platforms which normally make use of ROM-able zImage formats
  1082. normally set this to a suitable value in their defconfig file.
  1083. If ZBOOT_ROM is not enabled, this has no effect.
  1084. config ZBOOT_ROM
  1085. bool "Compressed boot loader in ROM/flash"
  1086. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1087. help
  1088. Say Y here if you intend to execute your compressed kernel image
  1089. (zImage) directly from ROM or flash. If unsure, say N.
  1090. config CMDLINE
  1091. string "Default kernel command string"
  1092. default ""
  1093. help
  1094. On some architectures (EBSA110 and CATS), there is currently no way
  1095. for the boot loader to pass arguments to the kernel. For these
  1096. architectures, you should supply some command-line options at build
  1097. time by entering them here. As a minimum, you should specify the
  1098. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1099. config XIP_KERNEL
  1100. bool "Kernel Execute-In-Place from ROM"
  1101. depends on !ZBOOT_ROM
  1102. help
  1103. Execute-In-Place allows the kernel to run from non-volatile storage
  1104. directly addressable by the CPU, such as NOR flash. This saves RAM
  1105. space since the text section of the kernel is not loaded from flash
  1106. to RAM. Read-write sections, such as the data section and stack,
  1107. are still copied to RAM. The XIP kernel is not compressed since
  1108. it has to run directly from flash, so it will take more space to
  1109. store it. The flash address used to link the kernel object files,
  1110. and for storing it, is configuration dependent. Therefore, if you
  1111. say Y here, you must know the proper physical address where to
  1112. store the kernel image depending on your own flash memory usage.
  1113. Also note that the make target becomes "make xipImage" rather than
  1114. "make zImage" or "make Image". The final kernel binary to put in
  1115. ROM memory will be arch/arm/boot/xipImage.
  1116. If unsure, say N.
  1117. config XIP_PHYS_ADDR
  1118. hex "XIP Kernel Physical Location"
  1119. depends on XIP_KERNEL
  1120. default "0x00080000"
  1121. help
  1122. This is the physical address in your flash memory the kernel will
  1123. be linked for and stored to. This address is dependent on your
  1124. own flash usage.
  1125. config KEXEC
  1126. bool "Kexec system call (EXPERIMENTAL)"
  1127. depends on EXPERIMENTAL
  1128. help
  1129. kexec is a system call that implements the ability to shutdown your
  1130. current kernel, and to start another kernel. It is like a reboot
  1131. but it is independent of the system firmware. And like a reboot
  1132. you can start any kernel with it, not just Linux.
  1133. It is an ongoing process to be certain the hardware in a machine
  1134. is properly shutdown, so do not be surprised if this code does not
  1135. initially work for you. It may help to enable device hotplugging
  1136. support.
  1137. config ATAGS_PROC
  1138. bool "Export atags in procfs"
  1139. depends on KEXEC
  1140. default y
  1141. help
  1142. Should the atags used to boot the kernel be exported in an "atags"
  1143. file in procfs. Useful with kexec.
  1144. endmenu
  1145. menu "CPU Power Management"
  1146. if ARCH_HAS_CPUFREQ
  1147. source "drivers/cpufreq/Kconfig"
  1148. config CPU_FREQ_SA1100
  1149. bool
  1150. config CPU_FREQ_SA1110
  1151. bool
  1152. config CPU_FREQ_INTEGRATOR
  1153. tristate "CPUfreq driver for ARM Integrator CPUs"
  1154. depends on ARCH_INTEGRATOR && CPU_FREQ
  1155. default y
  1156. help
  1157. This enables the CPUfreq driver for ARM Integrator CPUs.
  1158. For details, take a look at <file:Documentation/cpu-freq>.
  1159. If in doubt, say Y.
  1160. config CPU_FREQ_PXA
  1161. bool
  1162. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1163. default y
  1164. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1165. config CPU_FREQ_S3C64XX
  1166. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1167. depends on CPU_FREQ && CPU_S3C6410
  1168. config CPU_FREQ_S3C
  1169. bool
  1170. help
  1171. Internal configuration node for common cpufreq on Samsung SoC
  1172. config CPU_FREQ_S3C24XX
  1173. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1174. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1175. select CPU_FREQ_S3C
  1176. help
  1177. This enables the CPUfreq driver for the Samsung S3C24XX family
  1178. of CPUs.
  1179. For details, take a look at <file:Documentation/cpu-freq>.
  1180. If in doubt, say N.
  1181. config CPU_FREQ_S3C24XX_PLL
  1182. bool "Support CPUfreq changing of PLL frequency"
  1183. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1184. help
  1185. Compile in support for changing the PLL frequency from the
  1186. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1187. after a frequency change, so by default it is not enabled.
  1188. This also means that the PLL tables for the selected CPU(s) will
  1189. be built which may increase the size of the kernel image.
  1190. config CPU_FREQ_S3C24XX_DEBUG
  1191. bool "Debug CPUfreq Samsung driver core"
  1192. depends on CPU_FREQ_S3C24XX
  1193. help
  1194. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1195. config CPU_FREQ_S3C24XX_IODEBUG
  1196. bool "Debug CPUfreq Samsung driver IO timing"
  1197. depends on CPU_FREQ_S3C24XX
  1198. help
  1199. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1200. config CPU_FREQ_S3C24XX_DEBUGFS
  1201. bool "Export debugfs for CPUFreq"
  1202. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1203. help
  1204. Export status information via debugfs.
  1205. endif
  1206. source "drivers/cpuidle/Kconfig"
  1207. endmenu
  1208. menu "Floating point emulation"
  1209. comment "At least one emulation must be selected"
  1210. config FPE_NWFPE
  1211. bool "NWFPE math emulation"
  1212. depends on !AEABI || OABI_COMPAT
  1213. ---help---
  1214. Say Y to include the NWFPE floating point emulator in the kernel.
  1215. This is necessary to run most binaries. Linux does not currently
  1216. support floating point hardware so you need to say Y here even if
  1217. your machine has an FPA or floating point co-processor podule.
  1218. You may say N here if you are going to load the Acorn FPEmulator
  1219. early in the bootup.
  1220. config FPE_NWFPE_XP
  1221. bool "Support extended precision"
  1222. depends on FPE_NWFPE
  1223. help
  1224. Say Y to include 80-bit support in the kernel floating-point
  1225. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1226. Note that gcc does not generate 80-bit operations by default,
  1227. so in most cases this option only enlarges the size of the
  1228. floating point emulator without any good reason.
  1229. You almost surely want to say N here.
  1230. config FPE_FASTFPE
  1231. bool "FastFPE math emulation (EXPERIMENTAL)"
  1232. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1233. ---help---
  1234. Say Y here to include the FAST floating point emulator in the kernel.
  1235. This is an experimental much faster emulator which now also has full
  1236. precision for the mantissa. It does not support any exceptions.
  1237. It is very simple, and approximately 3-6 times faster than NWFPE.
  1238. It should be sufficient for most programs. It may be not suitable
  1239. for scientific calculations, but you have to check this for yourself.
  1240. If you do not feel you need a faster FP emulation you should better
  1241. choose NWFPE.
  1242. config VFP
  1243. bool "VFP-format floating point maths"
  1244. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1245. help
  1246. Say Y to include VFP support code in the kernel. This is needed
  1247. if your hardware includes a VFP unit.
  1248. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1249. release notes and additional status information.
  1250. Say N if your target does not have VFP hardware.
  1251. config VFPv3
  1252. bool
  1253. depends on VFP
  1254. default y if CPU_V7
  1255. config NEON
  1256. bool "Advanced SIMD (NEON) Extension support"
  1257. depends on VFPv3 && CPU_V7
  1258. help
  1259. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1260. Extension.
  1261. endmenu
  1262. menu "Userspace binary formats"
  1263. source "fs/Kconfig.binfmt"
  1264. config ARTHUR
  1265. tristate "RISC OS personality"
  1266. depends on !AEABI
  1267. help
  1268. Say Y here to include the kernel code necessary if you want to run
  1269. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1270. experimental; if this sounds frightening, say N and sleep in peace.
  1271. You can also say M here to compile this support as a module (which
  1272. will be called arthur).
  1273. endmenu
  1274. menu "Power management options"
  1275. source "kernel/power/Kconfig"
  1276. config ARCH_SUSPEND_POSSIBLE
  1277. def_bool y
  1278. endmenu
  1279. source "net/Kconfig"
  1280. source "drivers/Kconfig"
  1281. source "fs/Kconfig"
  1282. source "arch/arm/Kconfig.debug"
  1283. source "security/Kconfig"
  1284. source "crypto/Kconfig"
  1285. source "lib/Kconfig"