Kconfig 43 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 GENERIC_ATOMIC64 if (!CPU_32v6K)
  14. select HAVE_OPROFILE
  15. select HAVE_ARCH_KGDB
  16. select HAVE_KPROBES if (!XIP_KERNEL)
  17. select HAVE_KRETPROBES if (HAVE_KPROBES)
  18. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  19. select HAVE_GENERIC_DMA_COHERENT
  20. select HAVE_KERNEL_GZIP
  21. select HAVE_KERNEL_LZO
  22. select HAVE_KERNEL_LZMA
  23. select HAVE_PERF_EVENTS
  24. select PERF_USE_VMALLOC
  25. help
  26. The ARM series is a line of low-power-consumption RISC chip designs
  27. licensed by ARM Ltd and targeted at embedded applications and
  28. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  29. manufactured, but legacy ARM-based PC hardware remains popular in
  30. Europe. There is an ARM Linux project with a web page at
  31. <http://www.arm.linux.org.uk/>.
  32. config HAVE_PWM
  33. bool
  34. config SYS_SUPPORTS_APM_EMULATION
  35. bool
  36. config GENERIC_GPIO
  37. bool
  38. config GENERIC_TIME
  39. bool
  40. default y
  41. config ARCH_USES_GETTIMEOFFSET
  42. bool
  43. default n
  44. config GENERIC_CLOCKEVENTS
  45. bool
  46. config GENERIC_CLOCKEVENTS_BROADCAST
  47. bool
  48. depends on GENERIC_CLOCKEVENTS
  49. default y if SMP && !LOCAL_TIMERS
  50. config HAVE_TCM
  51. bool
  52. select GENERIC_ALLOCATOR
  53. config HAVE_PROC_CPU
  54. bool
  55. config NO_IOPORT
  56. bool
  57. config EISA
  58. bool
  59. ---help---
  60. The Extended Industry Standard Architecture (EISA) bus was
  61. developed as an open alternative to the IBM MicroChannel bus.
  62. The EISA bus provided some of the features of the IBM MicroChannel
  63. bus while maintaining backward compatibility with cards made for
  64. the older ISA bus. The EISA bus saw limited use between 1988 and
  65. 1995 when it was made obsolete by the PCI bus.
  66. Say Y here if you are building a kernel for an EISA-based machine.
  67. Otherwise, say N.
  68. config SBUS
  69. bool
  70. config MCA
  71. bool
  72. help
  73. MicroChannel Architecture is found in some IBM PS/2 machines and
  74. laptops. It is a bus system similar to PCI or ISA. See
  75. <file:Documentation/mca.txt> (and especially the web page given
  76. there) before attempting to build an MCA bus kernel.
  77. config GENERIC_HARDIRQS
  78. bool
  79. default y
  80. config STACKTRACE_SUPPORT
  81. bool
  82. default y
  83. config HAVE_LATENCYTOP_SUPPORT
  84. bool
  85. depends on !SMP
  86. default y
  87. config LOCKDEP_SUPPORT
  88. bool
  89. default y
  90. config TRACE_IRQFLAGS_SUPPORT
  91. bool
  92. default y
  93. config HARDIRQS_SW_RESEND
  94. bool
  95. default y
  96. config GENERIC_IRQ_PROBE
  97. bool
  98. default y
  99. config GENERIC_LOCKBREAK
  100. bool
  101. default y
  102. depends on SMP && PREEMPT
  103. config RWSEM_GENERIC_SPINLOCK
  104. bool
  105. default y
  106. config RWSEM_XCHGADD_ALGORITHM
  107. bool
  108. config ARCH_HAS_ILOG2_U32
  109. bool
  110. config ARCH_HAS_ILOG2_U64
  111. bool
  112. config ARCH_HAS_CPUFREQ
  113. bool
  114. help
  115. Internal node to signify that the ARCH has CPUFREQ support
  116. and that the relevant menu configurations are displayed for
  117. it.
  118. config GENERIC_HWEIGHT
  119. bool
  120. default y
  121. config GENERIC_CALIBRATE_DELAY
  122. bool
  123. default y
  124. config ARCH_MAY_HAVE_PC_FDC
  125. bool
  126. config ZONE_DMA
  127. bool
  128. config NEED_DMA_MAP_STATE
  129. def_bool y
  130. config GENERIC_ISA_DMA
  131. bool
  132. config FIQ
  133. bool
  134. config ARCH_MTD_XIP
  135. bool
  136. config GENERIC_HARDIRQS_NO__DO_IRQ
  137. def_bool y
  138. config ARM_L1_CACHE_SHIFT_6
  139. bool
  140. help
  141. Setting ARM L1 cache line size to 64 Bytes.
  142. if OPROFILE
  143. config OPROFILE_ARMV6
  144. def_bool y
  145. depends on CPU_V6 && !SMP
  146. select OPROFILE_ARM11_CORE
  147. config OPROFILE_MPCORE
  148. def_bool y
  149. depends on CPU_V6 && SMP
  150. select OPROFILE_ARM11_CORE
  151. config OPROFILE_ARM11_CORE
  152. bool
  153. config OPROFILE_ARMV7
  154. def_bool y
  155. depends on CPU_V7 && !SMP
  156. bool
  157. endif
  158. config VECTORS_BASE
  159. hex
  160. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  161. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  162. default 0x00000000
  163. help
  164. The base address of exception vectors.
  165. source "init/Kconfig"
  166. source "kernel/Kconfig.freezer"
  167. menu "System Type"
  168. config MMU
  169. bool "MMU-based Paged Memory Management Support"
  170. default y
  171. help
  172. Select if you want MMU-based virtualised addressing space
  173. support by paged memory management. If unsure, say 'Y'.
  174. #
  175. # The "ARM system type" choice list is ordered alphabetically by option
  176. # text. Please add new entries in the option alphabetic order.
  177. #
  178. choice
  179. prompt "ARM system type"
  180. default ARCH_VERSATILE
  181. config ARCH_AAEC2000
  182. bool "Agilent AAEC-2000 based"
  183. select CPU_ARM920T
  184. select ARM_AMBA
  185. select HAVE_CLK
  186. select ARCH_USES_GETTIMEOFFSET
  187. help
  188. This enables support for systems based on the Agilent AAEC-2000
  189. config ARCH_INTEGRATOR
  190. bool "ARM Ltd. Integrator family"
  191. select ARM_AMBA
  192. select ARCH_HAS_CPUFREQ
  193. select COMMON_CLKDEV
  194. select ICST525
  195. help
  196. Support for ARM's Integrator platform.
  197. config ARCH_REALVIEW
  198. bool "ARM Ltd. RealView family"
  199. select ARM_AMBA
  200. select COMMON_CLKDEV
  201. select ICST307
  202. select GENERIC_TIME
  203. select GENERIC_CLOCKEVENTS
  204. select ARCH_WANT_OPTIONAL_GPIOLIB
  205. help
  206. This enables support for ARM Ltd RealView boards.
  207. config ARCH_VERSATILE
  208. bool "ARM Ltd. Versatile family"
  209. select ARM_AMBA
  210. select ARM_VIC
  211. select COMMON_CLKDEV
  212. select ICST307
  213. select GENERIC_TIME
  214. select GENERIC_CLOCKEVENTS
  215. select ARCH_WANT_OPTIONAL_GPIOLIB
  216. help
  217. This enables support for ARM Ltd Versatile board.
  218. config ARCH_AT91
  219. bool "Atmel AT91"
  220. select GENERIC_GPIO
  221. select ARCH_REQUIRE_GPIOLIB
  222. select HAVE_CLK
  223. select ARCH_USES_GETTIMEOFFSET
  224. help
  225. This enables support for systems based on the Atmel AT91RM9200,
  226. AT91SAM9 and AT91CAP9 processors.
  227. config ARCH_BCMRING
  228. bool "Broadcom BCMRING"
  229. depends on MMU
  230. select CPU_V6
  231. select ARM_AMBA
  232. select COMMON_CLKDEV
  233. select GENERIC_TIME
  234. select GENERIC_CLOCKEVENTS
  235. select ARCH_WANT_OPTIONAL_GPIOLIB
  236. help
  237. Support for Broadcom's BCMRing platform.
  238. config ARCH_CLPS711X
  239. bool "Cirrus Logic CLPS711x/EP721x-based"
  240. select CPU_ARM720T
  241. select ARCH_USES_GETTIMEOFFSET
  242. help
  243. Support for Cirrus Logic 711x/721x based boards.
  244. config ARCH_GEMINI
  245. bool "Cortina Systems Gemini"
  246. select CPU_FA526
  247. select GENERIC_GPIO
  248. select ARCH_REQUIRE_GPIOLIB
  249. select ARCH_USES_GETTIMEOFFSET
  250. help
  251. Support for the Cortina Systems Gemini family SoCs
  252. config ARCH_EBSA110
  253. bool "EBSA-110"
  254. select CPU_SA110
  255. select ISA
  256. select NO_IOPORT
  257. select ARCH_USES_GETTIMEOFFSET
  258. help
  259. This is an evaluation board for the StrongARM processor available
  260. from Digital. It has limited hardware on-board, including an
  261. Ethernet interface, two PCMCIA sockets, two serial ports and a
  262. parallel port.
  263. config ARCH_EP93XX
  264. bool "EP93xx-based"
  265. select CPU_ARM920T
  266. select ARM_AMBA
  267. select ARM_VIC
  268. select GENERIC_GPIO
  269. select COMMON_CLKDEV
  270. select ARCH_REQUIRE_GPIOLIB
  271. select ARCH_HAS_HOLES_MEMORYMODEL
  272. select ARCH_USES_GETTIMEOFFSET
  273. help
  274. This enables support for the Cirrus EP93xx series of CPUs.
  275. config ARCH_FOOTBRIDGE
  276. bool "FootBridge"
  277. select CPU_SA110
  278. select FOOTBRIDGE
  279. select ARCH_USES_GETTIMEOFFSET
  280. help
  281. Support for systems based on the DC21285 companion chip
  282. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  283. config ARCH_MXC
  284. bool "Freescale MXC/iMX-based"
  285. select GENERIC_TIME
  286. select GENERIC_CLOCKEVENTS
  287. select ARCH_REQUIRE_GPIOLIB
  288. select COMMON_CLKDEV
  289. help
  290. Support for Freescale MXC/iMX-based family of processors
  291. config ARCH_STMP3XXX
  292. bool "Freescale STMP3xxx"
  293. select CPU_ARM926T
  294. select COMMON_CLKDEV
  295. select ARCH_REQUIRE_GPIOLIB
  296. select GENERIC_TIME
  297. select GENERIC_CLOCKEVENTS
  298. select GENERIC_GPIO
  299. select USB_ARCH_HAS_EHCI
  300. help
  301. Support for systems based on the Freescale 3xxx CPUs.
  302. config ARCH_NETX
  303. bool "Hilscher NetX based"
  304. select CPU_ARM926T
  305. select ARM_VIC
  306. select GENERIC_CLOCKEVENTS
  307. select GENERIC_TIME
  308. help
  309. This enables support for systems based on the Hilscher NetX Soc
  310. config ARCH_H720X
  311. bool "Hynix HMS720x-based"
  312. select CPU_ARM720T
  313. select ISA_DMA_API
  314. select ARCH_USES_GETTIMEOFFSET
  315. help
  316. This enables support for systems based on the Hynix HMS720x
  317. config ARCH_IOP13XX
  318. bool "IOP13xx-based"
  319. depends on MMU
  320. select CPU_XSC3
  321. select PLAT_IOP
  322. select PCI
  323. select ARCH_SUPPORTS_MSI
  324. select VMSPLIT_1G
  325. help
  326. Support for Intel's IOP13XX (XScale) family of processors.
  327. config ARCH_IOP32X
  328. bool "IOP32x-based"
  329. depends on MMU
  330. select CPU_XSCALE
  331. select PLAT_IOP
  332. select PCI
  333. select GENERIC_GPIO
  334. select ARCH_REQUIRE_GPIOLIB
  335. help
  336. Support for Intel's 80219 and IOP32X (XScale) family of
  337. processors.
  338. config ARCH_IOP33X
  339. bool "IOP33x-based"
  340. depends on MMU
  341. select CPU_XSCALE
  342. select PLAT_IOP
  343. select PCI
  344. select GENERIC_GPIO
  345. select ARCH_REQUIRE_GPIOLIB
  346. help
  347. Support for Intel's IOP33X (XScale) family of processors.
  348. config ARCH_IXP23XX
  349. bool "IXP23XX-based"
  350. depends on MMU
  351. select CPU_XSC3
  352. select PCI
  353. select ARCH_USES_GETTIMEOFFSET
  354. help
  355. Support for Intel's IXP23xx (XScale) family of processors.
  356. config ARCH_IXP2000
  357. bool "IXP2400/2800-based"
  358. depends on MMU
  359. select CPU_XSCALE
  360. select PCI
  361. select ARCH_USES_GETTIMEOFFSET
  362. help
  363. Support for Intel's IXP2400/2800 (XScale) family of processors.
  364. config ARCH_IXP4XX
  365. bool "IXP4xx-based"
  366. depends on MMU
  367. select CPU_XSCALE
  368. select GENERIC_GPIO
  369. select GENERIC_TIME
  370. select GENERIC_CLOCKEVENTS
  371. select DMABOUNCE if PCI
  372. help
  373. Support for Intel's IXP4XX (XScale) family of processors.
  374. config ARCH_L7200
  375. bool "LinkUp-L7200"
  376. select CPU_ARM720T
  377. select FIQ
  378. select ARCH_USES_GETTIMEOFFSET
  379. help
  380. Say Y here if you intend to run this kernel on a LinkUp Systems
  381. L7200 Software Development Board which uses an ARM720T processor.
  382. Information on this board can be obtained at:
  383. <http://www.linkupsys.com/>
  384. If you have any questions or comments about the Linux kernel port
  385. to this board, send e-mail to <sjhill@cotw.com>.
  386. config ARCH_DOVE
  387. bool "Marvell Dove"
  388. select PCI
  389. select GENERIC_GPIO
  390. select ARCH_REQUIRE_GPIOLIB
  391. select GENERIC_TIME
  392. select GENERIC_CLOCKEVENTS
  393. select PLAT_ORION
  394. help
  395. Support for the Marvell Dove SoC 88AP510
  396. config ARCH_KIRKWOOD
  397. bool "Marvell Kirkwood"
  398. select CPU_FEROCEON
  399. select PCI
  400. select GENERIC_GPIO
  401. select ARCH_REQUIRE_GPIOLIB
  402. select GENERIC_TIME
  403. select GENERIC_CLOCKEVENTS
  404. select PLAT_ORION
  405. help
  406. Support for the following Marvell Kirkwood series SoCs:
  407. 88F6180, 88F6192 and 88F6281.
  408. config ARCH_LOKI
  409. bool "Marvell Loki (88RC8480)"
  410. select CPU_FEROCEON
  411. select GENERIC_TIME
  412. select GENERIC_CLOCKEVENTS
  413. select PLAT_ORION
  414. help
  415. Support for the Marvell Loki (88RC8480) SoC.
  416. config ARCH_MV78XX0
  417. bool "Marvell MV78xx0"
  418. select CPU_FEROCEON
  419. select PCI
  420. select GENERIC_GPIO
  421. select ARCH_REQUIRE_GPIOLIB
  422. select GENERIC_TIME
  423. select GENERIC_CLOCKEVENTS
  424. select PLAT_ORION
  425. help
  426. Support for the following Marvell MV78xx0 series SoCs:
  427. MV781x0, MV782x0.
  428. config ARCH_ORION5X
  429. bool "Marvell Orion"
  430. depends on MMU
  431. select CPU_FEROCEON
  432. select PCI
  433. select GENERIC_GPIO
  434. select ARCH_REQUIRE_GPIOLIB
  435. select GENERIC_TIME
  436. select GENERIC_CLOCKEVENTS
  437. select PLAT_ORION
  438. help
  439. Support for the following Marvell Orion 5x series SoCs:
  440. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  441. Orion-2 (5281), Orion-1-90 (6183).
  442. config ARCH_MMP
  443. bool "Marvell PXA168/910/MMP2"
  444. depends on MMU
  445. select GENERIC_GPIO
  446. select ARCH_REQUIRE_GPIOLIB
  447. select COMMON_CLKDEV
  448. select GENERIC_TIME
  449. select GENERIC_CLOCKEVENTS
  450. select TICK_ONESHOT
  451. select PLAT_PXA
  452. help
  453. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  454. config ARCH_KS8695
  455. bool "Micrel/Kendin KS8695"
  456. select CPU_ARM922T
  457. select GENERIC_GPIO
  458. select ARCH_REQUIRE_GPIOLIB
  459. select ARCH_USES_GETTIMEOFFSET
  460. help
  461. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  462. System-on-Chip devices.
  463. config ARCH_NS9XXX
  464. bool "NetSilicon NS9xxx"
  465. select CPU_ARM926T
  466. select GENERIC_GPIO
  467. select GENERIC_TIME
  468. select GENERIC_CLOCKEVENTS
  469. select HAVE_CLK
  470. help
  471. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  472. System.
  473. <http://www.digi.com/products/microprocessors/index.jsp>
  474. config ARCH_W90X900
  475. bool "Nuvoton W90X900 CPU"
  476. select CPU_ARM926T
  477. select ARCH_REQUIRE_GPIOLIB
  478. select GENERIC_GPIO
  479. select COMMON_CLKDEV
  480. select GENERIC_TIME
  481. select GENERIC_CLOCKEVENTS
  482. help
  483. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  484. At present, the w90x900 has been renamed nuc900, regarding
  485. the ARM series product line, you can login the following
  486. link address to know more.
  487. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  488. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  489. config ARCH_NUC93X
  490. bool "Nuvoton NUC93X CPU"
  491. select CPU_ARM926T
  492. select COMMON_CLKDEV
  493. help
  494. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  495. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  496. config ARCH_PNX4008
  497. bool "Philips Nexperia PNX4008 Mobile"
  498. select CPU_ARM926T
  499. select COMMON_CLKDEV
  500. select ARCH_USES_GETTIMEOFFSET
  501. help
  502. This enables support for Philips PNX4008 mobile platform.
  503. config ARCH_PXA
  504. bool "PXA2xx/PXA3xx-based"
  505. depends on MMU
  506. select ARCH_MTD_XIP
  507. select ARCH_HAS_CPUFREQ
  508. select GENERIC_GPIO
  509. select COMMON_CLKDEV
  510. select ARCH_REQUIRE_GPIOLIB
  511. select GENERIC_TIME
  512. select GENERIC_CLOCKEVENTS
  513. select TICK_ONESHOT
  514. select PLAT_PXA
  515. help
  516. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  517. config ARCH_MSM
  518. bool "Qualcomm MSM"
  519. select CPU_V6
  520. select GENERIC_TIME
  521. select GENERIC_CLOCKEVENTS
  522. help
  523. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  524. apps processor of the MSM7K and depends on a shared memory
  525. interface to the ARM9 modem processor which runs the baseband stack
  526. and controls some vital subsystems (clock and power control, etc).
  527. config ARCH_SHMOBILE
  528. bool "Renesas SH-Mobile"
  529. help
  530. Support for Renesas's SH-Mobile ARM platforms
  531. config ARCH_RPC
  532. bool "RiscPC"
  533. select ARCH_ACORN
  534. select FIQ
  535. select TIMER_ACORN
  536. select ARCH_MAY_HAVE_PC_FDC
  537. select HAVE_PATA_PLATFORM
  538. select ISA_DMA_API
  539. select NO_IOPORT
  540. select ARCH_SPARSEMEM_ENABLE
  541. select ARCH_USES_GETTIMEOFFSET
  542. help
  543. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  544. CD-ROM interface, serial and parallel port, and the floppy drive.
  545. config ARCH_SA1100
  546. bool "SA1100-based"
  547. select CPU_SA1100
  548. select ISA
  549. select ARCH_SPARSEMEM_ENABLE
  550. select ARCH_MTD_XIP
  551. select ARCH_HAS_CPUFREQ
  552. select CPU_FREQ
  553. select GENERIC_GPIO
  554. select GENERIC_TIME
  555. select GENERIC_CLOCKEVENTS
  556. select HAVE_CLK
  557. select TICK_ONESHOT
  558. select ARCH_REQUIRE_GPIOLIB
  559. help
  560. Support for StrongARM 11x0 based boards.
  561. config ARCH_S3C2410
  562. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  563. select GENERIC_GPIO
  564. select ARCH_HAS_CPUFREQ
  565. select HAVE_CLK
  566. select ARCH_USES_GETTIMEOFFSET
  567. help
  568. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  569. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  570. the Samsung SMDK2410 development board (and derivatives).
  571. config ARCH_S3C64XX
  572. bool "Samsung S3C64XX"
  573. select PLAT_SAMSUNG
  574. select CPU_V6
  575. select GENERIC_GPIO
  576. select ARM_VIC
  577. select HAVE_CLK
  578. select NO_IOPORT
  579. select ARCH_USES_GETTIMEOFFSET
  580. select ARCH_HAS_CPUFREQ
  581. select ARCH_REQUIRE_GPIOLIB
  582. select SAMSUNG_CLKSRC
  583. select SAMSUNG_IRQ_VIC_TIMER
  584. select SAMSUNG_IRQ_UART
  585. select S3C_GPIO_TRACK
  586. select S3C_GPIO_PULL_UPDOWN
  587. select S3C_GPIO_CFG_S3C24XX
  588. select S3C_GPIO_CFG_S3C64XX
  589. select S3C_DEV_NAND
  590. select USB_ARCH_HAS_OHCI
  591. select SAMSUNG_GPIOLIB_4BIT
  592. help
  593. Samsung S3C64XX series based systems
  594. config ARCH_S5P6440
  595. bool "Samsung S5P6440"
  596. select CPU_V6
  597. select GENERIC_GPIO
  598. select HAVE_CLK
  599. help
  600. Samsung S5P6440 CPU based systems
  601. config ARCH_S5P6442
  602. bool "Samsung S5P6442"
  603. select CPU_V6
  604. select GENERIC_GPIO
  605. select HAVE_CLK
  606. help
  607. Samsung S5P6442 CPU based systems
  608. config ARCH_S5PC1XX
  609. bool "Samsung S5PC1XX"
  610. select GENERIC_GPIO
  611. select HAVE_CLK
  612. select CPU_V7
  613. select ARM_L1_CACHE_SHIFT_6
  614. help
  615. Samsung S5PC1XX series based systems
  616. config ARCH_S5PV210
  617. bool "Samsung S5PV210/S5PC110"
  618. select CPU_V7
  619. select GENERIC_GPIO
  620. select HAVE_CLK
  621. select ARM_L1_CACHE_SHIFT_6
  622. help
  623. Samsung S5PV210/S5PC110 series based systems
  624. config ARCH_SHARK
  625. bool "Shark"
  626. select CPU_SA110
  627. select ISA
  628. select ISA_DMA
  629. select ZONE_DMA
  630. select PCI
  631. select ARCH_USES_GETTIMEOFFSET
  632. help
  633. Support for the StrongARM based Digital DNARD machine, also known
  634. as "Shark" (<http://www.shark-linux.de/shark.html>).
  635. config ARCH_LH7A40X
  636. bool "Sharp LH7A40X"
  637. select CPU_ARM922T
  638. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  639. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  640. select ARCH_USES_GETTIMEOFFSET
  641. help
  642. Say Y here for systems based on one of the Sharp LH7A40X
  643. System on a Chip processors. These CPUs include an ARM922T
  644. core with a wide array of integrated devices for
  645. hand-held and low-power applications.
  646. config ARCH_U300
  647. bool "ST-Ericsson U300 Series"
  648. depends on MMU
  649. select CPU_ARM926T
  650. select HAVE_TCM
  651. select ARM_AMBA
  652. select ARM_VIC
  653. select GENERIC_TIME
  654. select GENERIC_CLOCKEVENTS
  655. select COMMON_CLKDEV
  656. select GENERIC_GPIO
  657. help
  658. Support for ST-Ericsson U300 series mobile platforms.
  659. config ARCH_U8500
  660. bool "ST-Ericsson U8500 Series"
  661. select CPU_V7
  662. select ARM_AMBA
  663. select GENERIC_TIME
  664. select GENERIC_CLOCKEVENTS
  665. select COMMON_CLKDEV
  666. help
  667. Support for ST-Ericsson's Ux500 architecture
  668. config ARCH_NOMADIK
  669. bool "STMicroelectronics Nomadik"
  670. select ARM_AMBA
  671. select ARM_VIC
  672. select CPU_ARM926T
  673. select COMMON_CLKDEV
  674. select GENERIC_TIME
  675. select GENERIC_CLOCKEVENTS
  676. select GENERIC_GPIO
  677. select ARCH_REQUIRE_GPIOLIB
  678. help
  679. Support for the Nomadik platform by ST-Ericsson
  680. config ARCH_DAVINCI
  681. bool "TI DaVinci"
  682. select CPU_ARM926T
  683. select GENERIC_TIME
  684. select GENERIC_CLOCKEVENTS
  685. select GENERIC_GPIO
  686. select ARCH_REQUIRE_GPIOLIB
  687. select ZONE_DMA
  688. select HAVE_IDE
  689. select COMMON_CLKDEV
  690. select GENERIC_ALLOCATOR
  691. select ARCH_HAS_HOLES_MEMORYMODEL
  692. help
  693. Support for TI's DaVinci platform.
  694. config ARCH_OMAP
  695. bool "TI OMAP"
  696. select GENERIC_GPIO
  697. select HAVE_CLK
  698. select ARCH_REQUIRE_GPIOLIB
  699. select ARCH_HAS_CPUFREQ
  700. select GENERIC_TIME
  701. select GENERIC_CLOCKEVENTS
  702. select ARCH_HAS_HOLES_MEMORYMODEL
  703. help
  704. Support for TI's OMAP platform (OMAP1 and OMAP2).
  705. endchoice
  706. #
  707. # This is sorted alphabetically by mach-* pathname. However, plat-*
  708. # Kconfigs may be included either alphabetically (according to the
  709. # plat- suffix) or along side the corresponding mach-* source.
  710. #
  711. source "arch/arm/mach-aaec2000/Kconfig"
  712. source "arch/arm/mach-at91/Kconfig"
  713. source "arch/arm/mach-bcmring/Kconfig"
  714. source "arch/arm/mach-clps711x/Kconfig"
  715. source "arch/arm/mach-davinci/Kconfig"
  716. source "arch/arm/mach-dove/Kconfig"
  717. source "arch/arm/mach-ep93xx/Kconfig"
  718. source "arch/arm/mach-footbridge/Kconfig"
  719. source "arch/arm/mach-gemini/Kconfig"
  720. source "arch/arm/mach-h720x/Kconfig"
  721. source "arch/arm/mach-integrator/Kconfig"
  722. source "arch/arm/mach-iop32x/Kconfig"
  723. source "arch/arm/mach-iop33x/Kconfig"
  724. source "arch/arm/mach-iop13xx/Kconfig"
  725. source "arch/arm/mach-ixp4xx/Kconfig"
  726. source "arch/arm/mach-ixp2000/Kconfig"
  727. source "arch/arm/mach-ixp23xx/Kconfig"
  728. source "arch/arm/mach-kirkwood/Kconfig"
  729. source "arch/arm/mach-ks8695/Kconfig"
  730. source "arch/arm/mach-lh7a40x/Kconfig"
  731. source "arch/arm/mach-loki/Kconfig"
  732. source "arch/arm/mach-msm/Kconfig"
  733. source "arch/arm/mach-mv78xx0/Kconfig"
  734. source "arch/arm/plat-mxc/Kconfig"
  735. source "arch/arm/mach-netx/Kconfig"
  736. source "arch/arm/mach-nomadik/Kconfig"
  737. source "arch/arm/plat-nomadik/Kconfig"
  738. source "arch/arm/mach-ns9xxx/Kconfig"
  739. source "arch/arm/mach-nuc93x/Kconfig"
  740. source "arch/arm/plat-omap/Kconfig"
  741. source "arch/arm/mach-omap1/Kconfig"
  742. source "arch/arm/mach-omap2/Kconfig"
  743. source "arch/arm/mach-orion5x/Kconfig"
  744. source "arch/arm/mach-pxa/Kconfig"
  745. source "arch/arm/plat-pxa/Kconfig"
  746. source "arch/arm/mach-mmp/Kconfig"
  747. source "arch/arm/mach-realview/Kconfig"
  748. source "arch/arm/mach-sa1100/Kconfig"
  749. source "arch/arm/plat-samsung/Kconfig"
  750. source "arch/arm/plat-s3c24xx/Kconfig"
  751. source "arch/arm/plat-s5p/Kconfig"
  752. source "arch/arm/plat-s5pc1xx/Kconfig"
  753. if ARCH_S3C2410
  754. source "arch/arm/mach-s3c2400/Kconfig"
  755. source "arch/arm/mach-s3c2410/Kconfig"
  756. source "arch/arm/mach-s3c2412/Kconfig"
  757. source "arch/arm/mach-s3c2440/Kconfig"
  758. source "arch/arm/mach-s3c2443/Kconfig"
  759. endif
  760. if ARCH_S3C64XX
  761. source "arch/arm/mach-s3c64xx/Kconfig"
  762. endif
  763. source "arch/arm/mach-s5p6440/Kconfig"
  764. source "arch/arm/mach-s5p6442/Kconfig"
  765. if ARCH_S5PC1XX
  766. source "arch/arm/mach-s5pc100/Kconfig"
  767. endif
  768. source "arch/arm/mach-s5pv210/Kconfig"
  769. source "arch/arm/mach-shmobile/Kconfig"
  770. source "arch/arm/plat-stmp3xxx/Kconfig"
  771. source "arch/arm/mach-u300/Kconfig"
  772. source "arch/arm/mach-ux500/Kconfig"
  773. source "arch/arm/mach-versatile/Kconfig"
  774. source "arch/arm/mach-w90x900/Kconfig"
  775. # Definitions to make life easier
  776. config ARCH_ACORN
  777. bool
  778. config PLAT_IOP
  779. bool
  780. select GENERIC_CLOCKEVENTS
  781. select GENERIC_TIME
  782. config PLAT_ORION
  783. bool
  784. config PLAT_PXA
  785. bool
  786. source arch/arm/mm/Kconfig
  787. config IWMMXT
  788. bool "Enable iWMMXt support"
  789. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  790. default y if PXA27x || PXA3xx || ARCH_MMP
  791. help
  792. Enable support for iWMMXt context switching at run time if
  793. running on a CPU that supports it.
  794. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  795. config XSCALE_PMU
  796. bool
  797. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  798. default y
  799. config CPU_HAS_PMU
  800. depends on CPU_V6 || CPU_V7 || XSCALE_PMU
  801. default y
  802. bool
  803. if !MMU
  804. source "arch/arm/Kconfig-nommu"
  805. endif
  806. config ARM_ERRATA_411920
  807. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  808. depends on CPU_V6 && !SMP
  809. help
  810. Invalidation of the Instruction Cache operation can
  811. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  812. It does not affect the MPCore. This option enables the ARM Ltd.
  813. recommended workaround.
  814. config ARM_ERRATA_430973
  815. bool "ARM errata: Stale prediction on replaced interworking branch"
  816. depends on CPU_V7
  817. help
  818. This option enables the workaround for the 430973 Cortex-A8
  819. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  820. interworking branch is replaced with another code sequence at the
  821. same virtual address, whether due to self-modifying code or virtual
  822. to physical address re-mapping, Cortex-A8 does not recover from the
  823. stale interworking branch prediction. This results in Cortex-A8
  824. executing the new code sequence in the incorrect ARM or Thumb state.
  825. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  826. and also flushes the branch target cache at every context switch.
  827. Note that setting specific bits in the ACTLR register may not be
  828. available in non-secure mode.
  829. config ARM_ERRATA_458693
  830. bool "ARM errata: Processor deadlock when a false hazard is created"
  831. depends on CPU_V7
  832. help
  833. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  834. erratum. For very specific sequences of memory operations, it is
  835. possible for a hazard condition intended for a cache line to instead
  836. be incorrectly associated with a different cache line. This false
  837. hazard might then cause a processor deadlock. The workaround enables
  838. the L1 caching of the NEON accesses and disables the PLD instruction
  839. in the ACTLR register. Note that setting specific bits in the ACTLR
  840. register may not be available in non-secure mode.
  841. config ARM_ERRATA_460075
  842. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  843. depends on CPU_V7
  844. help
  845. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  846. erratum. Any asynchronous access to the L2 cache may encounter a
  847. situation in which recent store transactions to the L2 cache are lost
  848. and overwritten with stale memory contents from external memory. The
  849. workaround disables the write-allocate mode for the L2 cache via the
  850. ACTLR register. Note that setting specific bits in the ACTLR register
  851. may not be available in non-secure mode.
  852. config PL310_ERRATA_588369
  853. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  854. depends on CACHE_L2X0 && ARCH_OMAP4
  855. help
  856. The PL310 L2 cache controller implements three types of Clean &
  857. Invalidate maintenance operations: by Physical Address
  858. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  859. They are architecturally defined to behave as the execution of a
  860. clean operation followed immediately by an invalidate operation,
  861. both performing to the same memory location. This functionality
  862. is not correctly implemented in PL310 as clean lines are not
  863. invalidated as a result of these operations. Note that this errata
  864. uses Texas Instrument's secure monitor api.
  865. endmenu
  866. source "arch/arm/common/Kconfig"
  867. config FORCE_MAX_ZONEORDER
  868. int
  869. depends on SA1111
  870. default "9"
  871. menu "Bus support"
  872. config ARM_AMBA
  873. bool
  874. config ISA
  875. bool
  876. help
  877. Find out whether you have ISA slots on your motherboard. ISA is the
  878. name of a bus system, i.e. the way the CPU talks to the other stuff
  879. inside your box. Other bus systems are PCI, EISA, MicroChannel
  880. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  881. newer boards don't support it. If you have ISA, say Y, otherwise N.
  882. # Select ISA DMA controller support
  883. config ISA_DMA
  884. bool
  885. select ISA_DMA_API
  886. # Select ISA DMA interface
  887. config ISA_DMA_API
  888. bool
  889. config PCI
  890. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  891. help
  892. Find out whether you have a PCI motherboard. PCI is the name of a
  893. bus system, i.e. the way the CPU talks to the other stuff inside
  894. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  895. VESA. If you have PCI, say Y, otherwise N.
  896. config PCI_SYSCALL
  897. def_bool PCI
  898. # Select the host bridge type
  899. config PCI_HOST_VIA82C505
  900. bool
  901. depends on PCI && ARCH_SHARK
  902. default y
  903. config PCI_HOST_ITE8152
  904. bool
  905. depends on PCI && MACH_ARMCORE
  906. default y
  907. select DMABOUNCE
  908. source "drivers/pci/Kconfig"
  909. source "drivers/pcmcia/Kconfig"
  910. endmenu
  911. menu "Kernel Features"
  912. source "kernel/time/Kconfig"
  913. config SMP
  914. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  915. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  916. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  917. depends on GENERIC_CLOCKEVENTS
  918. select USE_GENERIC_SMP_HELPERS
  919. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  920. help
  921. This enables support for systems with more than one CPU. If you have
  922. a system with only one CPU, like most personal computers, say N. If
  923. you have a system with more than one CPU, say Y.
  924. If you say N here, the kernel will run on single and multiprocessor
  925. machines, but will use only one CPU of a multiprocessor machine. If
  926. you say Y here, the kernel will run on many, but not all, single
  927. processor machines. On a single processor machine, the kernel will
  928. run faster if you say N here.
  929. See also <file:Documentation/i386/IO-APIC.txt>,
  930. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  931. <http://www.linuxdoc.org/docs.html#howto>.
  932. If you don't know what to do here, say N.
  933. config HAVE_ARM_SCU
  934. bool
  935. depends on SMP
  936. help
  937. This option enables support for the ARM system coherency unit
  938. config HAVE_ARM_TWD
  939. bool
  940. depends on SMP
  941. help
  942. This options enables support for the ARM timer and watchdog unit
  943. choice
  944. prompt "Memory split"
  945. default VMSPLIT_3G
  946. help
  947. Select the desired split between kernel and user memory.
  948. If you are not absolutely sure what you are doing, leave this
  949. option alone!
  950. config VMSPLIT_3G
  951. bool "3G/1G user/kernel split"
  952. config VMSPLIT_2G
  953. bool "2G/2G user/kernel split"
  954. config VMSPLIT_1G
  955. bool "1G/3G user/kernel split"
  956. endchoice
  957. config PAGE_OFFSET
  958. hex
  959. default 0x40000000 if VMSPLIT_1G
  960. default 0x80000000 if VMSPLIT_2G
  961. default 0xC0000000
  962. config NR_CPUS
  963. int "Maximum number of CPUs (2-32)"
  964. range 2 32
  965. depends on SMP
  966. default "4"
  967. config HOTPLUG_CPU
  968. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  969. depends on SMP && HOTPLUG && EXPERIMENTAL
  970. help
  971. Say Y here to experiment with turning CPUs off and on. CPUs
  972. can be controlled through /sys/devices/system/cpu.
  973. config LOCAL_TIMERS
  974. bool "Use local timer interrupts"
  975. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  976. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  977. default y
  978. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  979. help
  980. Enable support for local timers on SMP platforms, rather then the
  981. legacy IPI broadcast method. Local timers allows the system
  982. accounting to be spread across the timer interval, preventing a
  983. "thundering herd" at every timer tick.
  984. source kernel/Kconfig.preempt
  985. config HZ
  986. int
  987. default 128 if ARCH_L7200
  988. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
  989. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  990. default AT91_TIMER_HZ if ARCH_AT91
  991. default 100
  992. config THUMB2_KERNEL
  993. bool "Compile the kernel in Thumb-2 mode"
  994. depends on CPU_V7 && EXPERIMENTAL
  995. select AEABI
  996. select ARM_ASM_UNIFIED
  997. help
  998. By enabling this option, the kernel will be compiled in
  999. Thumb-2 mode. A compiler/assembler that understand the unified
  1000. ARM-Thumb syntax is needed.
  1001. If unsure, say N.
  1002. config ARM_ASM_UNIFIED
  1003. bool
  1004. config AEABI
  1005. bool "Use the ARM EABI to compile the kernel"
  1006. help
  1007. This option allows for the kernel to be compiled using the latest
  1008. ARM ABI (aka EABI). This is only useful if you are using a user
  1009. space environment that is also compiled with EABI.
  1010. Since there are major incompatibilities between the legacy ABI and
  1011. EABI, especially with regard to structure member alignment, this
  1012. option also changes the kernel syscall calling convention to
  1013. disambiguate both ABIs and allow for backward compatibility support
  1014. (selected with CONFIG_OABI_COMPAT).
  1015. To use this you need GCC version 4.0.0 or later.
  1016. config OABI_COMPAT
  1017. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1018. depends on AEABI && EXPERIMENTAL
  1019. default y
  1020. help
  1021. This option preserves the old syscall interface along with the
  1022. new (ARM EABI) one. It also provides a compatibility layer to
  1023. intercept syscalls that have structure arguments which layout
  1024. in memory differs between the legacy ABI and the new ARM EABI
  1025. (only for non "thumb" binaries). This option adds a tiny
  1026. overhead to all syscalls and produces a slightly larger kernel.
  1027. If you know you'll be using only pure EABI user space then you
  1028. can say N here. If this option is not selected and you attempt
  1029. to execute a legacy ABI binary then the result will be
  1030. UNPREDICTABLE (in fact it can be predicted that it won't work
  1031. at all). If in doubt say Y.
  1032. config ARCH_HAS_HOLES_MEMORYMODEL
  1033. bool
  1034. # Discontigmem is deprecated
  1035. config ARCH_DISCONTIGMEM_ENABLE
  1036. bool
  1037. config ARCH_SPARSEMEM_ENABLE
  1038. bool
  1039. config ARCH_SPARSEMEM_DEFAULT
  1040. def_bool ARCH_SPARSEMEM_ENABLE
  1041. config ARCH_SELECT_MEMORY_MODEL
  1042. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  1043. config NODES_SHIFT
  1044. int
  1045. default "4" if ARCH_LH7A40X
  1046. default "2"
  1047. depends on NEED_MULTIPLE_NODES
  1048. config HIGHMEM
  1049. bool "High Memory Support (EXPERIMENTAL)"
  1050. depends on MMU && EXPERIMENTAL
  1051. help
  1052. The address space of ARM processors is only 4 Gigabytes large
  1053. and it has to accommodate user address space, kernel address
  1054. space as well as some memory mapped IO. That means that, if you
  1055. have a large amount of physical memory and/or IO, not all of the
  1056. memory can be "permanently mapped" by the kernel. The physical
  1057. memory that is not permanently mapped is called "high memory".
  1058. Depending on the selected kernel/user memory split, minimum
  1059. vmalloc space and actual amount of RAM, you may not need this
  1060. option which should result in a slightly faster kernel.
  1061. If unsure, say n.
  1062. config HIGHPTE
  1063. bool "Allocate 2nd-level pagetables from highmem"
  1064. depends on HIGHMEM
  1065. depends on !OUTER_CACHE
  1066. config HW_PERF_EVENTS
  1067. bool "Enable hardware performance counter support for perf events"
  1068. depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
  1069. default y
  1070. help
  1071. Enable hardware performance counter support for perf events. If
  1072. disabled, perf events will use software events only.
  1073. source "mm/Kconfig"
  1074. config LEDS
  1075. bool "Timer and CPU usage LEDs"
  1076. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1077. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1078. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1079. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1080. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1081. ARCH_AT91 || ARCH_DAVINCI || \
  1082. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1083. help
  1084. If you say Y here, the LEDs on your machine will be used
  1085. to provide useful information about your current system status.
  1086. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1087. be able to select which LEDs are active using the options below. If
  1088. you are compiling a kernel for the EBSA-110 or the LART however, the
  1089. red LED will simply flash regularly to indicate that the system is
  1090. still functional. It is safe to say Y here if you have a CATS
  1091. system, but the driver will do nothing.
  1092. config LEDS_TIMER
  1093. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1094. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1095. || MACH_OMAP_PERSEUS2
  1096. depends on LEDS
  1097. depends on !GENERIC_CLOCKEVENTS
  1098. default y if ARCH_EBSA110
  1099. help
  1100. If you say Y here, one of the system LEDs (the green one on the
  1101. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1102. will flash regularly to indicate that the system is still
  1103. operational. This is mainly useful to kernel hackers who are
  1104. debugging unstable kernels.
  1105. The LART uses the same LED for both Timer LED and CPU usage LED
  1106. functions. You may choose to use both, but the Timer LED function
  1107. will overrule the CPU usage LED.
  1108. config LEDS_CPU
  1109. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1110. !ARCH_OMAP) \
  1111. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1112. || MACH_OMAP_PERSEUS2
  1113. depends on LEDS
  1114. help
  1115. If you say Y here, the red LED will be used to give a good real
  1116. time indication of CPU usage, by lighting whenever the idle task
  1117. is not currently executing.
  1118. The LART uses the same LED for both Timer LED and CPU usage LED
  1119. functions. You may choose to use both, but the Timer LED function
  1120. will overrule the CPU usage LED.
  1121. config ALIGNMENT_TRAP
  1122. bool
  1123. depends on CPU_CP15_MMU
  1124. default y if !ARCH_EBSA110
  1125. select HAVE_PROC_CPU if PROC_FS
  1126. help
  1127. ARM processors cannot fetch/store information which is not
  1128. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1129. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1130. fetch/store instructions will be emulated in software if you say
  1131. here, which has a severe performance impact. This is necessary for
  1132. correct operation of some network protocols. With an IP-only
  1133. configuration it is safe to say N, otherwise say Y.
  1134. config UACCESS_WITH_MEMCPY
  1135. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1136. depends on MMU && EXPERIMENTAL
  1137. default y if CPU_FEROCEON
  1138. help
  1139. Implement faster copy_to_user and clear_user methods for CPU
  1140. cores where a 8-word STM instruction give significantly higher
  1141. memory write throughput than a sequence of individual 32bit stores.
  1142. A possible side effect is a slight increase in scheduling latency
  1143. between threads sharing the same address space if they invoke
  1144. such copy operations with large buffers.
  1145. However, if the CPU data cache is using a write-allocate mode,
  1146. this option is unlikely to provide any performance gain.
  1147. endmenu
  1148. menu "Boot options"
  1149. # Compressed boot loader in ROM. Yes, we really want to ask about
  1150. # TEXT and BSS so we preserve their values in the config files.
  1151. config ZBOOT_ROM_TEXT
  1152. hex "Compressed ROM boot loader base address"
  1153. default "0"
  1154. help
  1155. The physical address at which the ROM-able zImage is to be
  1156. placed in the target. Platforms which normally make use of
  1157. ROM-able zImage formats normally set this to a suitable
  1158. value in their defconfig file.
  1159. If ZBOOT_ROM is not enabled, this has no effect.
  1160. config ZBOOT_ROM_BSS
  1161. hex "Compressed ROM boot loader BSS address"
  1162. default "0"
  1163. help
  1164. The base address of an area of read/write memory in the target
  1165. for the ROM-able zImage which must be available while the
  1166. decompressor is running. It must be large enough to hold the
  1167. entire decompressed kernel plus an additional 128 KiB.
  1168. Platforms which normally make use of ROM-able zImage formats
  1169. normally set this to a suitable value in their defconfig file.
  1170. If ZBOOT_ROM is not enabled, this has no effect.
  1171. config ZBOOT_ROM
  1172. bool "Compressed boot loader in ROM/flash"
  1173. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1174. help
  1175. Say Y here if you intend to execute your compressed kernel image
  1176. (zImage) directly from ROM or flash. If unsure, say N.
  1177. config CMDLINE
  1178. string "Default kernel command string"
  1179. default ""
  1180. help
  1181. On some architectures (EBSA110 and CATS), there is currently no way
  1182. for the boot loader to pass arguments to the kernel. For these
  1183. architectures, you should supply some command-line options at build
  1184. time by entering them here. As a minimum, you should specify the
  1185. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1186. config XIP_KERNEL
  1187. bool "Kernel Execute-In-Place from ROM"
  1188. depends on !ZBOOT_ROM
  1189. help
  1190. Execute-In-Place allows the kernel to run from non-volatile storage
  1191. directly addressable by the CPU, such as NOR flash. This saves RAM
  1192. space since the text section of the kernel is not loaded from flash
  1193. to RAM. Read-write sections, such as the data section and stack,
  1194. are still copied to RAM. The XIP kernel is not compressed since
  1195. it has to run directly from flash, so it will take more space to
  1196. store it. The flash address used to link the kernel object files,
  1197. and for storing it, is configuration dependent. Therefore, if you
  1198. say Y here, you must know the proper physical address where to
  1199. store the kernel image depending on your own flash memory usage.
  1200. Also note that the make target becomes "make xipImage" rather than
  1201. "make zImage" or "make Image". The final kernel binary to put in
  1202. ROM memory will be arch/arm/boot/xipImage.
  1203. If unsure, say N.
  1204. config XIP_PHYS_ADDR
  1205. hex "XIP Kernel Physical Location"
  1206. depends on XIP_KERNEL
  1207. default "0x00080000"
  1208. help
  1209. This is the physical address in your flash memory the kernel will
  1210. be linked for and stored to. This address is dependent on your
  1211. own flash usage.
  1212. config KEXEC
  1213. bool "Kexec system call (EXPERIMENTAL)"
  1214. depends on EXPERIMENTAL
  1215. help
  1216. kexec is a system call that implements the ability to shutdown your
  1217. current kernel, and to start another kernel. It is like a reboot
  1218. but it is independent of the system firmware. And like a reboot
  1219. you can start any kernel with it, not just Linux.
  1220. It is an ongoing process to be certain the hardware in a machine
  1221. is properly shutdown, so do not be surprised if this code does not
  1222. initially work for you. It may help to enable device hotplugging
  1223. support.
  1224. config ATAGS_PROC
  1225. bool "Export atags in procfs"
  1226. depends on KEXEC
  1227. default y
  1228. help
  1229. Should the atags used to boot the kernel be exported in an "atags"
  1230. file in procfs. Useful with kexec.
  1231. endmenu
  1232. menu "CPU Power Management"
  1233. if ARCH_HAS_CPUFREQ
  1234. source "drivers/cpufreq/Kconfig"
  1235. config CPU_FREQ_SA1100
  1236. bool
  1237. config CPU_FREQ_SA1110
  1238. bool
  1239. config CPU_FREQ_INTEGRATOR
  1240. tristate "CPUfreq driver for ARM Integrator CPUs"
  1241. depends on ARCH_INTEGRATOR && CPU_FREQ
  1242. default y
  1243. help
  1244. This enables the CPUfreq driver for ARM Integrator CPUs.
  1245. For details, take a look at <file:Documentation/cpu-freq>.
  1246. If in doubt, say Y.
  1247. config CPU_FREQ_PXA
  1248. bool
  1249. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1250. default y
  1251. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1252. config CPU_FREQ_S3C64XX
  1253. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1254. depends on CPU_FREQ && CPU_S3C6410
  1255. config CPU_FREQ_S3C
  1256. bool
  1257. help
  1258. Internal configuration node for common cpufreq on Samsung SoC
  1259. config CPU_FREQ_S3C24XX
  1260. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1261. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1262. select CPU_FREQ_S3C
  1263. help
  1264. This enables the CPUfreq driver for the Samsung S3C24XX family
  1265. of CPUs.
  1266. For details, take a look at <file:Documentation/cpu-freq>.
  1267. If in doubt, say N.
  1268. config CPU_FREQ_S3C24XX_PLL
  1269. bool "Support CPUfreq changing of PLL frequency"
  1270. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1271. help
  1272. Compile in support for changing the PLL frequency from the
  1273. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1274. after a frequency change, so by default it is not enabled.
  1275. This also means that the PLL tables for the selected CPU(s) will
  1276. be built which may increase the size of the kernel image.
  1277. config CPU_FREQ_S3C24XX_DEBUG
  1278. bool "Debug CPUfreq Samsung driver core"
  1279. depends on CPU_FREQ_S3C24XX
  1280. help
  1281. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1282. config CPU_FREQ_S3C24XX_IODEBUG
  1283. bool "Debug CPUfreq Samsung driver IO timing"
  1284. depends on CPU_FREQ_S3C24XX
  1285. help
  1286. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1287. config CPU_FREQ_S3C24XX_DEBUGFS
  1288. bool "Export debugfs for CPUFreq"
  1289. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1290. help
  1291. Export status information via debugfs.
  1292. endif
  1293. source "drivers/cpuidle/Kconfig"
  1294. endmenu
  1295. menu "Floating point emulation"
  1296. comment "At least one emulation must be selected"
  1297. config FPE_NWFPE
  1298. bool "NWFPE math emulation"
  1299. depends on !AEABI || OABI_COMPAT
  1300. ---help---
  1301. Say Y to include the NWFPE floating point emulator in the kernel.
  1302. This is necessary to run most binaries. Linux does not currently
  1303. support floating point hardware so you need to say Y here even if
  1304. your machine has an FPA or floating point co-processor podule.
  1305. You may say N here if you are going to load the Acorn FPEmulator
  1306. early in the bootup.
  1307. config FPE_NWFPE_XP
  1308. bool "Support extended precision"
  1309. depends on FPE_NWFPE
  1310. help
  1311. Say Y to include 80-bit support in the kernel floating-point
  1312. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1313. Note that gcc does not generate 80-bit operations by default,
  1314. so in most cases this option only enlarges the size of the
  1315. floating point emulator without any good reason.
  1316. You almost surely want to say N here.
  1317. config FPE_FASTFPE
  1318. bool "FastFPE math emulation (EXPERIMENTAL)"
  1319. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1320. ---help---
  1321. Say Y here to include the FAST floating point emulator in the kernel.
  1322. This is an experimental much faster emulator which now also has full
  1323. precision for the mantissa. It does not support any exceptions.
  1324. It is very simple, and approximately 3-6 times faster than NWFPE.
  1325. It should be sufficient for most programs. It may be not suitable
  1326. for scientific calculations, but you have to check this for yourself.
  1327. If you do not feel you need a faster FP emulation you should better
  1328. choose NWFPE.
  1329. config VFP
  1330. bool "VFP-format floating point maths"
  1331. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1332. help
  1333. Say Y to include VFP support code in the kernel. This is needed
  1334. if your hardware includes a VFP unit.
  1335. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1336. release notes and additional status information.
  1337. Say N if your target does not have VFP hardware.
  1338. config VFPv3
  1339. bool
  1340. depends on VFP
  1341. default y if CPU_V7
  1342. config NEON
  1343. bool "Advanced SIMD (NEON) Extension support"
  1344. depends on VFPv3 && CPU_V7
  1345. help
  1346. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1347. Extension.
  1348. endmenu
  1349. menu "Userspace binary formats"
  1350. source "fs/Kconfig.binfmt"
  1351. config ARTHUR
  1352. tristate "RISC OS personality"
  1353. depends on !AEABI
  1354. help
  1355. Say Y here to include the kernel code necessary if you want to run
  1356. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1357. experimental; if this sounds frightening, say N and sleep in peace.
  1358. You can also say M here to compile this support as a module (which
  1359. will be called arthur).
  1360. endmenu
  1361. menu "Power management options"
  1362. source "kernel/power/Kconfig"
  1363. config ARCH_SUSPEND_POSSIBLE
  1364. def_bool y
  1365. endmenu
  1366. source "net/Kconfig"
  1367. source "drivers/Kconfig"
  1368. source "fs/Kconfig"
  1369. source "arch/arm/Kconfig.debug"
  1370. source "security/Kconfig"
  1371. source "crypto/Kconfig"
  1372. source "lib/Kconfig"