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_PERF_EVENTS
  23. select PERF_USE_VMALLOC
  24. help
  25. The ARM series is a line of low-power-consumption RISC chip designs
  26. licensed by ARM Ltd and targeted at embedded applications and
  27. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  28. manufactured, but legacy ARM-based PC hardware remains popular in
  29. Europe. There is an ARM Linux project with a web page at
  30. <http://www.arm.linux.org.uk/>.
  31. config HAVE_PWM
  32. bool
  33. config SYS_SUPPORTS_APM_EMULATION
  34. bool
  35. config GENERIC_GPIO
  36. bool
  37. config GENERIC_TIME
  38. bool
  39. config GENERIC_CLOCKEVENTS
  40. bool
  41. config GENERIC_CLOCKEVENTS_BROADCAST
  42. bool
  43. depends on GENERIC_CLOCKEVENTS
  44. default y if SMP && !LOCAL_TIMERS
  45. config HAVE_TCM
  46. bool
  47. select GENERIC_ALLOCATOR
  48. config HAVE_PROC_CPU
  49. bool
  50. config NO_IOPORT
  51. bool
  52. config EISA
  53. bool
  54. ---help---
  55. The Extended Industry Standard Architecture (EISA) bus was
  56. developed as an open alternative to the IBM MicroChannel bus.
  57. The EISA bus provided some of the features of the IBM MicroChannel
  58. bus while maintaining backward compatibility with cards made for
  59. the older ISA bus. The EISA bus saw limited use between 1988 and
  60. 1995 when it was made obsolete by the PCI bus.
  61. Say Y here if you are building a kernel for an EISA-based machine.
  62. Otherwise, say N.
  63. config SBUS
  64. bool
  65. config MCA
  66. bool
  67. help
  68. MicroChannel Architecture is found in some IBM PS/2 machines and
  69. laptops. It is a bus system similar to PCI or ISA. See
  70. <file:Documentation/mca.txt> (and especially the web page given
  71. there) before attempting to build an MCA bus kernel.
  72. config GENERIC_HARDIRQS
  73. bool
  74. default y
  75. config STACKTRACE_SUPPORT
  76. bool
  77. default y
  78. config HAVE_LATENCYTOP_SUPPORT
  79. bool
  80. depends on !SMP
  81. default y
  82. config LOCKDEP_SUPPORT
  83. bool
  84. default y
  85. config TRACE_IRQFLAGS_SUPPORT
  86. bool
  87. default y
  88. config HARDIRQS_SW_RESEND
  89. bool
  90. default y
  91. config GENERIC_IRQ_PROBE
  92. bool
  93. default y
  94. config GENERIC_LOCKBREAK
  95. bool
  96. default y
  97. depends on SMP && PREEMPT
  98. config RWSEM_GENERIC_SPINLOCK
  99. bool
  100. default y
  101. config RWSEM_XCHGADD_ALGORITHM
  102. bool
  103. config ARCH_HAS_ILOG2_U32
  104. bool
  105. config ARCH_HAS_ILOG2_U64
  106. bool
  107. config ARCH_HAS_CPUFREQ
  108. bool
  109. help
  110. Internal node to signify that the ARCH has CPUFREQ support
  111. and that the relevant menu configurations are displayed for
  112. it.
  113. config GENERIC_HWEIGHT
  114. bool
  115. default y
  116. config GENERIC_CALIBRATE_DELAY
  117. bool
  118. default y
  119. config ARCH_MAY_HAVE_PC_FDC
  120. bool
  121. config ZONE_DMA
  122. bool
  123. config NEED_DMA_MAP_STATE
  124. def_bool y
  125. config GENERIC_ISA_DMA
  126. bool
  127. config FIQ
  128. bool
  129. config ARCH_MTD_XIP
  130. bool
  131. config GENERIC_HARDIRQS_NO__DO_IRQ
  132. def_bool y
  133. config ARM_L1_CACHE_SHIFT_6
  134. bool
  135. help
  136. Setting ARM L1 cache line size to 64 Bytes.
  137. if OPROFILE
  138. config OPROFILE_ARMV6
  139. def_bool y
  140. depends on CPU_V6 && !SMP
  141. select OPROFILE_ARM11_CORE
  142. config OPROFILE_MPCORE
  143. def_bool y
  144. depends on CPU_V6 && SMP
  145. select OPROFILE_ARM11_CORE
  146. config OPROFILE_ARM11_CORE
  147. bool
  148. config OPROFILE_ARMV7
  149. def_bool y
  150. depends on CPU_V7 && !SMP
  151. bool
  152. endif
  153. config VECTORS_BASE
  154. hex
  155. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  156. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  157. default 0x00000000
  158. help
  159. The base address of exception vectors.
  160. source "init/Kconfig"
  161. source "kernel/Kconfig.freezer"
  162. menu "System Type"
  163. config MMU
  164. bool "MMU-based Paged Memory Management Support"
  165. default y
  166. help
  167. Select if you want MMU-based virtualised addressing space
  168. support by paged memory management. If unsure, say 'Y'.
  169. #
  170. # The "ARM system type" choice list is ordered alphabetically by option
  171. # text. Please add new entries in the option alphabetic order.
  172. #
  173. choice
  174. prompt "ARM system type"
  175. default ARCH_VERSATILE
  176. config ARCH_AAEC2000
  177. bool "Agilent AAEC-2000 based"
  178. select CPU_ARM920T
  179. select ARM_AMBA
  180. select HAVE_CLK
  181. help
  182. This enables support for systems based on the Agilent AAEC-2000
  183. config ARCH_INTEGRATOR
  184. bool "ARM Ltd. Integrator family"
  185. select ARM_AMBA
  186. select ARCH_HAS_CPUFREQ
  187. select HAVE_CLK
  188. select COMMON_CLKDEV
  189. select ICST525
  190. help
  191. Support for ARM's Integrator platform.
  192. config ARCH_REALVIEW
  193. bool "ARM Ltd. RealView family"
  194. select ARM_AMBA
  195. select HAVE_CLK
  196. select COMMON_CLKDEV
  197. select ICST307
  198. select GENERIC_TIME
  199. select GENERIC_CLOCKEVENTS
  200. select ARCH_WANT_OPTIONAL_GPIOLIB
  201. help
  202. This enables support for ARM Ltd RealView boards.
  203. config ARCH_VERSATILE
  204. bool "ARM Ltd. Versatile family"
  205. select ARM_AMBA
  206. select ARM_VIC
  207. select HAVE_CLK
  208. select COMMON_CLKDEV
  209. select ICST307
  210. select GENERIC_TIME
  211. select GENERIC_CLOCKEVENTS
  212. select ARCH_WANT_OPTIONAL_GPIOLIB
  213. help
  214. This enables support for ARM Ltd Versatile board.
  215. config ARCH_AT91
  216. bool "Atmel AT91"
  217. select GENERIC_GPIO
  218. select ARCH_REQUIRE_GPIOLIB
  219. select HAVE_CLK
  220. help
  221. This enables support for systems based on the Atmel AT91RM9200,
  222. AT91SAM9 and AT91CAP9 processors.
  223. config ARCH_BCMRING
  224. bool "Broadcom BCMRING"
  225. depends on MMU
  226. select CPU_V6
  227. select ARM_AMBA
  228. select COMMON_CLKDEV
  229. select GENERIC_TIME
  230. select GENERIC_CLOCKEVENTS
  231. select ARCH_WANT_OPTIONAL_GPIOLIB
  232. help
  233. Support for Broadcom's BCMRing platform.
  234. config ARCH_CLPS711X
  235. bool "Cirrus Logic CLPS711x/EP721x-based"
  236. select CPU_ARM720T
  237. help
  238. Support for Cirrus Logic 711x/721x based boards.
  239. config ARCH_GEMINI
  240. bool "Cortina Systems Gemini"
  241. select CPU_FA526
  242. select GENERIC_GPIO
  243. select ARCH_REQUIRE_GPIOLIB
  244. help
  245. Support for the Cortina Systems Gemini family SoCs
  246. config ARCH_EBSA110
  247. bool "EBSA-110"
  248. select CPU_SA110
  249. select ISA
  250. select NO_IOPORT
  251. help
  252. This is an evaluation board for the StrongARM processor available
  253. from Digital. It has limited hardware on-board, including an
  254. Ethernet interface, two PCMCIA sockets, two serial ports and a
  255. parallel port.
  256. config ARCH_EP93XX
  257. bool "EP93xx-based"
  258. select CPU_ARM920T
  259. select ARM_AMBA
  260. select ARM_VIC
  261. select GENERIC_GPIO
  262. select HAVE_CLK
  263. select COMMON_CLKDEV
  264. select ARCH_REQUIRE_GPIOLIB
  265. select ARCH_HAS_HOLES_MEMORYMODEL
  266. help
  267. This enables support for the Cirrus EP93xx series of CPUs.
  268. config ARCH_FOOTBRIDGE
  269. bool "FootBridge"
  270. select CPU_SA110
  271. select FOOTBRIDGE
  272. help
  273. Support for systems based on the DC21285 companion chip
  274. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  275. config ARCH_MXC
  276. bool "Freescale MXC/iMX-based"
  277. select GENERIC_TIME
  278. select GENERIC_CLOCKEVENTS
  279. select ARCH_REQUIRE_GPIOLIB
  280. select HAVE_CLK
  281. select COMMON_CLKDEV
  282. help
  283. Support for Freescale MXC/iMX-based family of processors
  284. config ARCH_STMP3XXX
  285. bool "Freescale STMP3xxx"
  286. select CPU_ARM926T
  287. select HAVE_CLK
  288. select COMMON_CLKDEV
  289. select ARCH_REQUIRE_GPIOLIB
  290. select GENERIC_TIME
  291. select GENERIC_CLOCKEVENTS
  292. select GENERIC_GPIO
  293. select USB_ARCH_HAS_EHCI
  294. help
  295. Support for systems based on the Freescale 3xxx CPUs.
  296. config ARCH_NETX
  297. bool "Hilscher NetX based"
  298. select CPU_ARM926T
  299. select ARM_VIC
  300. select GENERIC_CLOCKEVENTS
  301. select GENERIC_TIME
  302. help
  303. This enables support for systems based on the Hilscher NetX Soc
  304. config ARCH_H720X
  305. bool "Hynix HMS720x-based"
  306. select CPU_ARM720T
  307. select ISA_DMA_API
  308. help
  309. This enables support for systems based on the Hynix HMS720x
  310. config ARCH_IOP13XX
  311. bool "IOP13xx-based"
  312. depends on MMU
  313. select CPU_XSC3
  314. select PLAT_IOP
  315. select PCI
  316. select ARCH_SUPPORTS_MSI
  317. select VMSPLIT_1G
  318. help
  319. Support for Intel's IOP13XX (XScale) family of processors.
  320. config ARCH_IOP32X
  321. bool "IOP32x-based"
  322. depends on MMU
  323. select CPU_XSCALE
  324. select PLAT_IOP
  325. select PCI
  326. select GENERIC_GPIO
  327. select ARCH_REQUIRE_GPIOLIB
  328. help
  329. Support for Intel's 80219 and IOP32X (XScale) family of
  330. processors.
  331. config ARCH_IOP33X
  332. bool "IOP33x-based"
  333. depends on MMU
  334. select CPU_XSCALE
  335. select PLAT_IOP
  336. select PCI
  337. select GENERIC_GPIO
  338. select ARCH_REQUIRE_GPIOLIB
  339. help
  340. Support for Intel's IOP33X (XScale) family of processors.
  341. config ARCH_IXP23XX
  342. bool "IXP23XX-based"
  343. depends on MMU
  344. select CPU_XSC3
  345. select PCI
  346. help
  347. Support for Intel's IXP23xx (XScale) family of processors.
  348. config ARCH_IXP2000
  349. bool "IXP2400/2800-based"
  350. depends on MMU
  351. select CPU_XSCALE
  352. select PCI
  353. help
  354. Support for Intel's IXP2400/2800 (XScale) family of processors.
  355. config ARCH_IXP4XX
  356. bool "IXP4xx-based"
  357. depends on MMU
  358. select CPU_XSCALE
  359. select GENERIC_GPIO
  360. select GENERIC_TIME
  361. select GENERIC_CLOCKEVENTS
  362. select DMABOUNCE if PCI
  363. help
  364. Support for Intel's IXP4XX (XScale) family of processors.
  365. config ARCH_L7200
  366. bool "LinkUp-L7200"
  367. select CPU_ARM720T
  368. select FIQ
  369. help
  370. Say Y here if you intend to run this kernel on a LinkUp Systems
  371. L7200 Software Development Board which uses an ARM720T processor.
  372. Information on this board can be obtained at:
  373. <http://www.linkupsys.com/>
  374. If you have any questions or comments about the Linux kernel port
  375. to this board, send e-mail to <sjhill@cotw.com>.
  376. config ARCH_DOVE
  377. bool "Marvell Dove"
  378. select PCI
  379. select GENERIC_GPIO
  380. select ARCH_REQUIRE_GPIOLIB
  381. select GENERIC_TIME
  382. select GENERIC_CLOCKEVENTS
  383. select PLAT_ORION
  384. help
  385. Support for the Marvell Dove SoC 88AP510
  386. config ARCH_KIRKWOOD
  387. bool "Marvell Kirkwood"
  388. select CPU_FEROCEON
  389. select PCI
  390. select GENERIC_GPIO
  391. select ARCH_REQUIRE_GPIOLIB
  392. select GENERIC_TIME
  393. select GENERIC_CLOCKEVENTS
  394. select PLAT_ORION
  395. help
  396. Support for the following Marvell Kirkwood series SoCs:
  397. 88F6180, 88F6192 and 88F6281.
  398. config ARCH_LOKI
  399. bool "Marvell Loki (88RC8480)"
  400. select CPU_FEROCEON
  401. select GENERIC_TIME
  402. select GENERIC_CLOCKEVENTS
  403. select PLAT_ORION
  404. help
  405. Support for the Marvell Loki (88RC8480) SoC.
  406. config ARCH_MV78XX0
  407. bool "Marvell MV78xx0"
  408. select CPU_FEROCEON
  409. select PCI
  410. select GENERIC_GPIO
  411. select ARCH_REQUIRE_GPIOLIB
  412. select GENERIC_TIME
  413. select GENERIC_CLOCKEVENTS
  414. select PLAT_ORION
  415. help
  416. Support for the following Marvell MV78xx0 series SoCs:
  417. MV781x0, MV782x0.
  418. config ARCH_ORION5X
  419. bool "Marvell Orion"
  420. depends on MMU
  421. select CPU_FEROCEON
  422. select PCI
  423. select GENERIC_GPIO
  424. select ARCH_REQUIRE_GPIOLIB
  425. select GENERIC_TIME
  426. select GENERIC_CLOCKEVENTS
  427. select PLAT_ORION
  428. help
  429. Support for the following Marvell Orion 5x series SoCs:
  430. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  431. Orion-2 (5281), Orion-1-90 (6183).
  432. config ARCH_MMP
  433. bool "Marvell PXA168/910/MMP2"
  434. depends on MMU
  435. select GENERIC_GPIO
  436. select ARCH_REQUIRE_GPIOLIB
  437. select HAVE_CLK
  438. select COMMON_CLKDEV
  439. select GENERIC_TIME
  440. select GENERIC_CLOCKEVENTS
  441. select TICK_ONESHOT
  442. select PLAT_PXA
  443. help
  444. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  445. config ARCH_KS8695
  446. bool "Micrel/Kendin KS8695"
  447. select CPU_ARM922T
  448. select GENERIC_GPIO
  449. select ARCH_REQUIRE_GPIOLIB
  450. help
  451. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  452. System-on-Chip devices.
  453. config ARCH_NS9XXX
  454. bool "NetSilicon NS9xxx"
  455. select CPU_ARM926T
  456. select GENERIC_GPIO
  457. select GENERIC_TIME
  458. select GENERIC_CLOCKEVENTS
  459. select HAVE_CLK
  460. help
  461. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  462. System.
  463. <http://www.digi.com/products/microprocessors/index.jsp>
  464. config ARCH_W90X900
  465. bool "Nuvoton W90X900 CPU"
  466. select CPU_ARM926T
  467. select ARCH_REQUIRE_GPIOLIB
  468. select GENERIC_GPIO
  469. select HAVE_CLK
  470. select COMMON_CLKDEV
  471. select GENERIC_TIME
  472. select GENERIC_CLOCKEVENTS
  473. help
  474. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  475. At present, the w90x900 has been renamed nuc900, regarding
  476. the ARM series product line, you can login the following
  477. link address to know more.
  478. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  479. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  480. config ARCH_NUC93X
  481. bool "Nuvoton NUC93X CPU"
  482. select CPU_ARM926T
  483. select HAVE_CLK
  484. select COMMON_CLKDEV
  485. help
  486. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  487. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  488. config ARCH_PNX4008
  489. bool "Philips Nexperia PNX4008 Mobile"
  490. select CPU_ARM926T
  491. select HAVE_CLK
  492. select COMMON_CLKDEV
  493. help
  494. This enables support for Philips PNX4008 mobile platform.
  495. config ARCH_PXA
  496. bool "PXA2xx/PXA3xx-based"
  497. depends on MMU
  498. select ARCH_MTD_XIP
  499. select ARCH_HAS_CPUFREQ
  500. select GENERIC_GPIO
  501. select HAVE_CLK
  502. select COMMON_CLKDEV
  503. select ARCH_REQUIRE_GPIOLIB
  504. select GENERIC_TIME
  505. select GENERIC_CLOCKEVENTS
  506. select TICK_ONESHOT
  507. select PLAT_PXA
  508. help
  509. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  510. config ARCH_MSM
  511. bool "Qualcomm MSM"
  512. select CPU_V6
  513. select GENERIC_TIME
  514. select GENERIC_CLOCKEVENTS
  515. help
  516. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  517. apps processor of the MSM7K and depends on a shared memory
  518. interface to the ARM9 modem processor which runs the baseband stack
  519. and controls some vital subsystems (clock and power control, etc).
  520. config ARCH_SHMOBILE
  521. bool "Renesas SH-Mobile"
  522. help
  523. Support for Renesas's SH-Mobile ARM platforms
  524. config ARCH_RPC
  525. bool "RiscPC"
  526. select ARCH_ACORN
  527. select FIQ
  528. select TIMER_ACORN
  529. select ARCH_MAY_HAVE_PC_FDC
  530. select HAVE_PATA_PLATFORM
  531. select ISA_DMA_API
  532. select NO_IOPORT
  533. select ARCH_SPARSEMEM_ENABLE
  534. help
  535. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  536. CD-ROM interface, serial and parallel port, and the floppy drive.
  537. config ARCH_SA1100
  538. bool "SA1100-based"
  539. select CPU_SA1100
  540. select ISA
  541. select ARCH_SPARSEMEM_ENABLE
  542. select ARCH_MTD_XIP
  543. select ARCH_HAS_CPUFREQ
  544. select CPU_FREQ
  545. select GENERIC_GPIO
  546. select GENERIC_TIME
  547. select GENERIC_CLOCKEVENTS
  548. select HAVE_CLK
  549. select TICK_ONESHOT
  550. select ARCH_REQUIRE_GPIOLIB
  551. help
  552. Support for StrongARM 11x0 based boards.
  553. config ARCH_S3C2410
  554. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  555. select GENERIC_GPIO
  556. select ARCH_HAS_CPUFREQ
  557. select HAVE_CLK
  558. help
  559. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  560. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  561. the Samsung SMDK2410 development board (and derivatives).
  562. config ARCH_S3C64XX
  563. bool "Samsung S3C64XX"
  564. select PLAT_SAMSUNG
  565. select CPU_V6
  566. select GENERIC_GPIO
  567. select ARM_VIC
  568. select HAVE_CLK
  569. select NO_IOPORT
  570. select ARCH_HAS_CPUFREQ
  571. select ARCH_REQUIRE_GPIOLIB
  572. select SAMSUNG_CLKSRC
  573. select SAMSUNG_IRQ_VIC_TIMER
  574. select SAMSUNG_IRQ_UART
  575. select S3C_GPIO_TRACK
  576. select S3C_GPIO_PULL_UPDOWN
  577. select S3C_GPIO_CFG_S3C24XX
  578. select S3C_GPIO_CFG_S3C64XX
  579. select S3C_DEV_NAND
  580. select USB_ARCH_HAS_OHCI
  581. select SAMSUNG_GPIOLIB_4BIT
  582. help
  583. Samsung S3C64XX series based systems
  584. config ARCH_S5P6440
  585. bool "Samsung S5P6440"
  586. select CPU_V6
  587. select GENERIC_GPIO
  588. select HAVE_CLK
  589. help
  590. Samsung S5P6440 CPU based systems
  591. config ARCH_S5P6442
  592. bool "Samsung S5P6442"
  593. select CPU_V6
  594. select GENERIC_GPIO
  595. select HAVE_CLK
  596. help
  597. Samsung S5P6442 CPU based systems
  598. config ARCH_S5PC1XX
  599. bool "Samsung S5PC1XX"
  600. select GENERIC_GPIO
  601. select HAVE_CLK
  602. select CPU_V7
  603. select ARM_L1_CACHE_SHIFT_6
  604. help
  605. Samsung S5PC1XX series based systems
  606. config ARCH_S5PV210
  607. bool "Samsung S5PV210/S5PC110"
  608. select CPU_V7
  609. select GENERIC_GPIO
  610. select HAVE_CLK
  611. select ARM_L1_CACHE_SHIFT_6
  612. help
  613. Samsung S5PV210/S5PC110 series based systems
  614. config ARCH_SHARK
  615. bool "Shark"
  616. select CPU_SA110
  617. select ISA
  618. select ISA_DMA
  619. select ZONE_DMA
  620. select PCI
  621. help
  622. Support for the StrongARM based Digital DNARD machine, also known
  623. as "Shark" (<http://www.shark-linux.de/shark.html>).
  624. config ARCH_LH7A40X
  625. bool "Sharp LH7A40X"
  626. select CPU_ARM922T
  627. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  628. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  629. help
  630. Say Y here for systems based on one of the Sharp LH7A40X
  631. System on a Chip processors. These CPUs include an ARM922T
  632. core with a wide array of integrated devices for
  633. hand-held and low-power applications.
  634. config ARCH_U300
  635. bool "ST-Ericsson U300 Series"
  636. depends on MMU
  637. select CPU_ARM926T
  638. select HAVE_TCM
  639. select ARM_AMBA
  640. select ARM_VIC
  641. select GENERIC_TIME
  642. select GENERIC_CLOCKEVENTS
  643. select HAVE_CLK
  644. select COMMON_CLKDEV
  645. select GENERIC_GPIO
  646. help
  647. Support for ST-Ericsson U300 series mobile platforms.
  648. config ARCH_U8500
  649. bool "ST-Ericsson U8500 Series"
  650. select CPU_V7
  651. select ARM_AMBA
  652. select GENERIC_TIME
  653. select GENERIC_CLOCKEVENTS
  654. select COMMON_CLKDEV
  655. help
  656. Support for ST-Ericsson's Ux500 architecture
  657. config ARCH_NOMADIK
  658. bool "STMicroelectronics Nomadik"
  659. select ARM_AMBA
  660. select ARM_VIC
  661. select CPU_ARM926T
  662. select HAVE_CLK
  663. select COMMON_CLKDEV
  664. select GENERIC_TIME
  665. select GENERIC_CLOCKEVENTS
  666. select GENERIC_GPIO
  667. select ARCH_REQUIRE_GPIOLIB
  668. help
  669. Support for the Nomadik platform by ST-Ericsson
  670. config ARCH_DAVINCI
  671. bool "TI DaVinci"
  672. select CPU_ARM926T
  673. select GENERIC_TIME
  674. select GENERIC_CLOCKEVENTS
  675. select GENERIC_GPIO
  676. select ARCH_REQUIRE_GPIOLIB
  677. select HAVE_CLK
  678. select ZONE_DMA
  679. select HAVE_IDE
  680. select COMMON_CLKDEV
  681. select GENERIC_ALLOCATOR
  682. select ARCH_HAS_HOLES_MEMORYMODEL
  683. help
  684. Support for TI's DaVinci platform.
  685. config ARCH_OMAP
  686. bool "TI OMAP"
  687. select GENERIC_GPIO
  688. select HAVE_CLK
  689. select ARCH_REQUIRE_GPIOLIB
  690. select ARCH_HAS_CPUFREQ
  691. select GENERIC_TIME
  692. select GENERIC_CLOCKEVENTS
  693. select ARCH_HAS_HOLES_MEMORYMODEL
  694. help
  695. Support for TI's OMAP platform (OMAP1 and OMAP2).
  696. config PLAT_SPEAR
  697. bool "ST SPEAr"
  698. select ARM_AMBA
  699. select ARCH_REQUIRE_GPIOLIB
  700. select COMMON_CLKDEV
  701. select GENERIC_CLOCKEVENTS
  702. select GENERIC_GPIO
  703. select GENERIC_TIME
  704. select HAVE_CLK
  705. help
  706. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  707. endchoice
  708. #
  709. # This is sorted alphabetically by mach-* pathname. However, plat-*
  710. # Kconfigs may be included either alphabetically (according to the
  711. # plat- suffix) or along side the corresponding mach-* source.
  712. #
  713. source "arch/arm/mach-aaec2000/Kconfig"
  714. source "arch/arm/mach-at91/Kconfig"
  715. source "arch/arm/mach-bcmring/Kconfig"
  716. source "arch/arm/mach-clps711x/Kconfig"
  717. source "arch/arm/mach-davinci/Kconfig"
  718. source "arch/arm/mach-dove/Kconfig"
  719. source "arch/arm/mach-ep93xx/Kconfig"
  720. source "arch/arm/mach-footbridge/Kconfig"
  721. source "arch/arm/mach-gemini/Kconfig"
  722. source "arch/arm/mach-h720x/Kconfig"
  723. source "arch/arm/mach-integrator/Kconfig"
  724. source "arch/arm/mach-iop32x/Kconfig"
  725. source "arch/arm/mach-iop33x/Kconfig"
  726. source "arch/arm/mach-iop13xx/Kconfig"
  727. source "arch/arm/mach-ixp4xx/Kconfig"
  728. source "arch/arm/mach-ixp2000/Kconfig"
  729. source "arch/arm/mach-ixp23xx/Kconfig"
  730. source "arch/arm/mach-kirkwood/Kconfig"
  731. source "arch/arm/mach-ks8695/Kconfig"
  732. source "arch/arm/mach-lh7a40x/Kconfig"
  733. source "arch/arm/mach-loki/Kconfig"
  734. source "arch/arm/mach-msm/Kconfig"
  735. source "arch/arm/mach-mv78xx0/Kconfig"
  736. source "arch/arm/plat-mxc/Kconfig"
  737. source "arch/arm/mach-netx/Kconfig"
  738. source "arch/arm/mach-nomadik/Kconfig"
  739. source "arch/arm/plat-nomadik/Kconfig"
  740. source "arch/arm/mach-ns9xxx/Kconfig"
  741. source "arch/arm/mach-nuc93x/Kconfig"
  742. source "arch/arm/plat-omap/Kconfig"
  743. source "arch/arm/mach-omap1/Kconfig"
  744. source "arch/arm/mach-omap2/Kconfig"
  745. source "arch/arm/mach-orion5x/Kconfig"
  746. source "arch/arm/mach-pxa/Kconfig"
  747. source "arch/arm/plat-pxa/Kconfig"
  748. source "arch/arm/mach-mmp/Kconfig"
  749. source "arch/arm/mach-realview/Kconfig"
  750. source "arch/arm/mach-sa1100/Kconfig"
  751. source "arch/arm/plat-samsung/Kconfig"
  752. source "arch/arm/plat-s3c24xx/Kconfig"
  753. source "arch/arm/plat-s5p/Kconfig"
  754. source "arch/arm/plat-s5pc1xx/Kconfig"
  755. source "arch/arm/plat-spear/Kconfig"
  756. if ARCH_S3C2410
  757. source "arch/arm/mach-s3c2400/Kconfig"
  758. source "arch/arm/mach-s3c2410/Kconfig"
  759. source "arch/arm/mach-s3c2412/Kconfig"
  760. source "arch/arm/mach-s3c2440/Kconfig"
  761. source "arch/arm/mach-s3c2443/Kconfig"
  762. endif
  763. if ARCH_S3C64XX
  764. source "arch/arm/mach-s3c64xx/Kconfig"
  765. endif
  766. source "arch/arm/mach-s5p6440/Kconfig"
  767. source "arch/arm/mach-s5p6442/Kconfig"
  768. if ARCH_S5PC1XX
  769. source "arch/arm/mach-s5pc100/Kconfig"
  770. endif
  771. source "arch/arm/mach-s5pv210/Kconfig"
  772. source "arch/arm/mach-shmobile/Kconfig"
  773. source "arch/arm/plat-stmp3xxx/Kconfig"
  774. source "arch/arm/mach-u300/Kconfig"
  775. source "arch/arm/mach-ux500/Kconfig"
  776. source "arch/arm/mach-versatile/Kconfig"
  777. source "arch/arm/mach-w90x900/Kconfig"
  778. # Definitions to make life easier
  779. config ARCH_ACORN
  780. bool
  781. config PLAT_IOP
  782. bool
  783. select GENERIC_CLOCKEVENTS
  784. select GENERIC_TIME
  785. config PLAT_ORION
  786. bool
  787. config PLAT_PXA
  788. bool
  789. source arch/arm/mm/Kconfig
  790. config IWMMXT
  791. bool "Enable iWMMXt support"
  792. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  793. default y if PXA27x || PXA3xx || ARCH_MMP
  794. help
  795. Enable support for iWMMXt context switching at run time if
  796. running on a CPU that supports it.
  797. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  798. config XSCALE_PMU
  799. bool
  800. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  801. default y
  802. config CPU_HAS_PMU
  803. depends on CPU_V6 || CPU_V7 || XSCALE_PMU
  804. default y
  805. bool
  806. if !MMU
  807. source "arch/arm/Kconfig-nommu"
  808. endif
  809. config ARM_ERRATA_411920
  810. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  811. depends on CPU_V6 && !SMP
  812. help
  813. Invalidation of the Instruction Cache operation can
  814. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  815. It does not affect the MPCore. This option enables the ARM Ltd.
  816. recommended workaround.
  817. config ARM_ERRATA_430973
  818. bool "ARM errata: Stale prediction on replaced interworking branch"
  819. depends on CPU_V7
  820. help
  821. This option enables the workaround for the 430973 Cortex-A8
  822. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  823. interworking branch is replaced with another code sequence at the
  824. same virtual address, whether due to self-modifying code or virtual
  825. to physical address re-mapping, Cortex-A8 does not recover from the
  826. stale interworking branch prediction. This results in Cortex-A8
  827. executing the new code sequence in the incorrect ARM or Thumb state.
  828. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  829. and also flushes the branch target cache at every context switch.
  830. Note that setting specific bits in the ACTLR register may not be
  831. available in non-secure mode.
  832. config ARM_ERRATA_458693
  833. bool "ARM errata: Processor deadlock when a false hazard is created"
  834. depends on CPU_V7
  835. help
  836. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  837. erratum. For very specific sequences of memory operations, it is
  838. possible for a hazard condition intended for a cache line to instead
  839. be incorrectly associated with a different cache line. This false
  840. hazard might then cause a processor deadlock. The workaround enables
  841. the L1 caching of the NEON accesses and disables the PLD instruction
  842. in the ACTLR register. Note that setting specific bits in the ACTLR
  843. register may not be available in non-secure mode.
  844. config ARM_ERRATA_460075
  845. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  846. depends on CPU_V7
  847. help
  848. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  849. erratum. Any asynchronous access to the L2 cache may encounter a
  850. situation in which recent store transactions to the L2 cache are lost
  851. and overwritten with stale memory contents from external memory. The
  852. workaround disables the write-allocate mode for the L2 cache via the
  853. ACTLR register. Note that setting specific bits in the ACTLR register
  854. may not be available in non-secure mode.
  855. config PL310_ERRATA_588369
  856. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  857. depends on CACHE_L2X0 && ARCH_OMAP4
  858. help
  859. The PL310 L2 cache controller implements three types of Clean &
  860. Invalidate maintenance operations: by Physical Address
  861. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  862. They are architecturally defined to behave as the execution of a
  863. clean operation followed immediately by an invalidate operation,
  864. both performing to the same memory location. This functionality
  865. is not correctly implemented in PL310 as clean lines are not
  866. invalidated as a result of these operations. Note that this errata
  867. uses Texas Instrument's secure monitor api.
  868. endmenu
  869. source "arch/arm/common/Kconfig"
  870. config FORCE_MAX_ZONEORDER
  871. int
  872. depends on SA1111
  873. default "9"
  874. menu "Bus support"
  875. config ARM_AMBA
  876. bool
  877. config ISA
  878. bool
  879. help
  880. Find out whether you have ISA slots on your motherboard. ISA is the
  881. name of a bus system, i.e. the way the CPU talks to the other stuff
  882. inside your box. Other bus systems are PCI, EISA, MicroChannel
  883. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  884. newer boards don't support it. If you have ISA, say Y, otherwise N.
  885. # Select ISA DMA controller support
  886. config ISA_DMA
  887. bool
  888. select ISA_DMA_API
  889. # Select ISA DMA interface
  890. config ISA_DMA_API
  891. bool
  892. config PCI
  893. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  894. help
  895. Find out whether you have a PCI motherboard. PCI is the name of a
  896. bus system, i.e. the way the CPU talks to the other stuff inside
  897. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  898. VESA. If you have PCI, say Y, otherwise N.
  899. config PCI_SYSCALL
  900. def_bool PCI
  901. # Select the host bridge type
  902. config PCI_HOST_VIA82C505
  903. bool
  904. depends on PCI && ARCH_SHARK
  905. default y
  906. config PCI_HOST_ITE8152
  907. bool
  908. depends on PCI && MACH_ARMCORE
  909. default y
  910. select DMABOUNCE
  911. source "drivers/pci/Kconfig"
  912. source "drivers/pcmcia/Kconfig"
  913. endmenu
  914. menu "Kernel Features"
  915. source "kernel/time/Kconfig"
  916. config SMP
  917. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  918. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  919. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  920. depends on GENERIC_CLOCKEVENTS
  921. select USE_GENERIC_SMP_HELPERS
  922. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  923. help
  924. This enables support for systems with more than one CPU. If you have
  925. a system with only one CPU, like most personal computers, say N. If
  926. you have a system with more than one CPU, say Y.
  927. If you say N here, the kernel will run on single and multiprocessor
  928. machines, but will use only one CPU of a multiprocessor machine. If
  929. you say Y here, the kernel will run on many, but not all, single
  930. processor machines. On a single processor machine, the kernel will
  931. run faster if you say N here.
  932. See also <file:Documentation/i386/IO-APIC.txt>,
  933. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  934. <http://www.linuxdoc.org/docs.html#howto>.
  935. If you don't know what to do here, say N.
  936. config HAVE_ARM_SCU
  937. bool
  938. depends on SMP
  939. help
  940. This option enables support for the ARM system coherency unit
  941. config HAVE_ARM_TWD
  942. bool
  943. depends on SMP
  944. help
  945. This options enables support for the ARM timer and watchdog unit
  946. choice
  947. prompt "Memory split"
  948. default VMSPLIT_3G
  949. help
  950. Select the desired split between kernel and user memory.
  951. If you are not absolutely sure what you are doing, leave this
  952. option alone!
  953. config VMSPLIT_3G
  954. bool "3G/1G user/kernel split"
  955. config VMSPLIT_2G
  956. bool "2G/2G user/kernel split"
  957. config VMSPLIT_1G
  958. bool "1G/3G user/kernel split"
  959. endchoice
  960. config PAGE_OFFSET
  961. hex
  962. default 0x40000000 if VMSPLIT_1G
  963. default 0x80000000 if VMSPLIT_2G
  964. default 0xC0000000
  965. config NR_CPUS
  966. int "Maximum number of CPUs (2-32)"
  967. range 2 32
  968. depends on SMP
  969. default "4"
  970. config HOTPLUG_CPU
  971. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  972. depends on SMP && HOTPLUG && EXPERIMENTAL
  973. help
  974. Say Y here to experiment with turning CPUs off and on. CPUs
  975. can be controlled through /sys/devices/system/cpu.
  976. config LOCAL_TIMERS
  977. bool "Use local timer interrupts"
  978. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  979. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  980. default y
  981. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  982. help
  983. Enable support for local timers on SMP platforms, rather then the
  984. legacy IPI broadcast method. Local timers allows the system
  985. accounting to be spread across the timer interval, preventing a
  986. "thundering herd" at every timer tick.
  987. source kernel/Kconfig.preempt
  988. config HZ
  989. int
  990. default 128 if ARCH_L7200
  991. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
  992. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  993. default AT91_TIMER_HZ if ARCH_AT91
  994. default 100
  995. config THUMB2_KERNEL
  996. bool "Compile the kernel in Thumb-2 mode"
  997. depends on CPU_V7 && EXPERIMENTAL
  998. select AEABI
  999. select ARM_ASM_UNIFIED
  1000. help
  1001. By enabling this option, the kernel will be compiled in
  1002. Thumb-2 mode. A compiler/assembler that understand the unified
  1003. ARM-Thumb syntax is needed.
  1004. If unsure, say N.
  1005. config ARM_ASM_UNIFIED
  1006. bool
  1007. config AEABI
  1008. bool "Use the ARM EABI to compile the kernel"
  1009. help
  1010. This option allows for the kernel to be compiled using the latest
  1011. ARM ABI (aka EABI). This is only useful if you are using a user
  1012. space environment that is also compiled with EABI.
  1013. Since there are major incompatibilities between the legacy ABI and
  1014. EABI, especially with regard to structure member alignment, this
  1015. option also changes the kernel syscall calling convention to
  1016. disambiguate both ABIs and allow for backward compatibility support
  1017. (selected with CONFIG_OABI_COMPAT).
  1018. To use this you need GCC version 4.0.0 or later.
  1019. config OABI_COMPAT
  1020. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1021. depends on AEABI && EXPERIMENTAL
  1022. default y
  1023. help
  1024. This option preserves the old syscall interface along with the
  1025. new (ARM EABI) one. It also provides a compatibility layer to
  1026. intercept syscalls that have structure arguments which layout
  1027. in memory differs between the legacy ABI and the new ARM EABI
  1028. (only for non "thumb" binaries). This option adds a tiny
  1029. overhead to all syscalls and produces a slightly larger kernel.
  1030. If you know you'll be using only pure EABI user space then you
  1031. can say N here. If this option is not selected and you attempt
  1032. to execute a legacy ABI binary then the result will be
  1033. UNPREDICTABLE (in fact it can be predicted that it won't work
  1034. at all). If in doubt say Y.
  1035. config ARCH_HAS_HOLES_MEMORYMODEL
  1036. bool
  1037. # Discontigmem is deprecated
  1038. config ARCH_DISCONTIGMEM_ENABLE
  1039. bool
  1040. config ARCH_SPARSEMEM_ENABLE
  1041. bool
  1042. config ARCH_SPARSEMEM_DEFAULT
  1043. def_bool ARCH_SPARSEMEM_ENABLE
  1044. config ARCH_SELECT_MEMORY_MODEL
  1045. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  1046. config NODES_SHIFT
  1047. int
  1048. default "4" if ARCH_LH7A40X
  1049. default "2"
  1050. depends on NEED_MULTIPLE_NODES
  1051. config HIGHMEM
  1052. bool "High Memory Support (EXPERIMENTAL)"
  1053. depends on MMU && EXPERIMENTAL
  1054. help
  1055. The address space of ARM processors is only 4 Gigabytes large
  1056. and it has to accommodate user address space, kernel address
  1057. space as well as some memory mapped IO. That means that, if you
  1058. have a large amount of physical memory and/or IO, not all of the
  1059. memory can be "permanently mapped" by the kernel. The physical
  1060. memory that is not permanently mapped is called "high memory".
  1061. Depending on the selected kernel/user memory split, minimum
  1062. vmalloc space and actual amount of RAM, you may not need this
  1063. option which should result in a slightly faster kernel.
  1064. If unsure, say n.
  1065. config HIGHPTE
  1066. bool "Allocate 2nd-level pagetables from highmem"
  1067. depends on HIGHMEM
  1068. depends on !OUTER_CACHE
  1069. config HW_PERF_EVENTS
  1070. bool "Enable hardware performance counter support for perf events"
  1071. depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
  1072. default y
  1073. help
  1074. Enable hardware performance counter support for perf events. If
  1075. disabled, perf events will use software events only.
  1076. source "mm/Kconfig"
  1077. config LEDS
  1078. bool "Timer and CPU usage LEDs"
  1079. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1080. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1081. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1082. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1083. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1084. ARCH_AT91 || ARCH_DAVINCI || \
  1085. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1086. help
  1087. If you say Y here, the LEDs on your machine will be used
  1088. to provide useful information about your current system status.
  1089. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1090. be able to select which LEDs are active using the options below. If
  1091. you are compiling a kernel for the EBSA-110 or the LART however, the
  1092. red LED will simply flash regularly to indicate that the system is
  1093. still functional. It is safe to say Y here if you have a CATS
  1094. system, but the driver will do nothing.
  1095. config LEDS_TIMER
  1096. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1097. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1098. || MACH_OMAP_PERSEUS2
  1099. depends on LEDS
  1100. depends on !GENERIC_CLOCKEVENTS
  1101. default y if ARCH_EBSA110
  1102. help
  1103. If you say Y here, one of the system LEDs (the green one on the
  1104. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1105. will flash regularly to indicate that the system is still
  1106. operational. This is mainly useful to kernel hackers who are
  1107. debugging unstable kernels.
  1108. The LART uses the same LED for both Timer LED and CPU usage LED
  1109. functions. You may choose to use both, but the Timer LED function
  1110. will overrule the CPU usage LED.
  1111. config LEDS_CPU
  1112. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1113. !ARCH_OMAP) \
  1114. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1115. || MACH_OMAP_PERSEUS2
  1116. depends on LEDS
  1117. help
  1118. If you say Y here, the red LED will be used to give a good real
  1119. time indication of CPU usage, by lighting whenever the idle task
  1120. is not currently executing.
  1121. The LART uses the same LED for both Timer LED and CPU usage LED
  1122. functions. You may choose to use both, but the Timer LED function
  1123. will overrule the CPU usage LED.
  1124. config ALIGNMENT_TRAP
  1125. bool
  1126. depends on CPU_CP15_MMU
  1127. default y if !ARCH_EBSA110
  1128. select HAVE_PROC_CPU if PROC_FS
  1129. help
  1130. ARM processors cannot fetch/store information which is not
  1131. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1132. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1133. fetch/store instructions will be emulated in software if you say
  1134. here, which has a severe performance impact. This is necessary for
  1135. correct operation of some network protocols. With an IP-only
  1136. configuration it is safe to say N, otherwise say Y.
  1137. config UACCESS_WITH_MEMCPY
  1138. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1139. depends on MMU && EXPERIMENTAL
  1140. default y if CPU_FEROCEON
  1141. help
  1142. Implement faster copy_to_user and clear_user methods for CPU
  1143. cores where a 8-word STM instruction give significantly higher
  1144. memory write throughput than a sequence of individual 32bit stores.
  1145. A possible side effect is a slight increase in scheduling latency
  1146. between threads sharing the same address space if they invoke
  1147. such copy operations with large buffers.
  1148. However, if the CPU data cache is using a write-allocate mode,
  1149. this option is unlikely to provide any performance gain.
  1150. endmenu
  1151. menu "Boot options"
  1152. # Compressed boot loader in ROM. Yes, we really want to ask about
  1153. # TEXT and BSS so we preserve their values in the config files.
  1154. config ZBOOT_ROM_TEXT
  1155. hex "Compressed ROM boot loader base address"
  1156. default "0"
  1157. help
  1158. The physical address at which the ROM-able zImage is to be
  1159. placed in the target. Platforms which normally make use of
  1160. ROM-able zImage formats normally set this to a suitable
  1161. value in their defconfig file.
  1162. If ZBOOT_ROM is not enabled, this has no effect.
  1163. config ZBOOT_ROM_BSS
  1164. hex "Compressed ROM boot loader BSS address"
  1165. default "0"
  1166. help
  1167. The base address of an area of read/write memory in the target
  1168. for the ROM-able zImage which must be available while the
  1169. decompressor is running. It must be large enough to hold the
  1170. entire decompressed kernel plus an additional 128 KiB.
  1171. Platforms which normally make use of ROM-able zImage formats
  1172. normally set this to a suitable value in their defconfig file.
  1173. If ZBOOT_ROM is not enabled, this has no effect.
  1174. config ZBOOT_ROM
  1175. bool "Compressed boot loader in ROM/flash"
  1176. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1177. help
  1178. Say Y here if you intend to execute your compressed kernel image
  1179. (zImage) directly from ROM or flash. If unsure, say N.
  1180. config CMDLINE
  1181. string "Default kernel command string"
  1182. default ""
  1183. help
  1184. On some architectures (EBSA110 and CATS), there is currently no way
  1185. for the boot loader to pass arguments to the kernel. For these
  1186. architectures, you should supply some command-line options at build
  1187. time by entering them here. As a minimum, you should specify the
  1188. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1189. config XIP_KERNEL
  1190. bool "Kernel Execute-In-Place from ROM"
  1191. depends on !ZBOOT_ROM
  1192. help
  1193. Execute-In-Place allows the kernel to run from non-volatile storage
  1194. directly addressable by the CPU, such as NOR flash. This saves RAM
  1195. space since the text section of the kernel is not loaded from flash
  1196. to RAM. Read-write sections, such as the data section and stack,
  1197. are still copied to RAM. The XIP kernel is not compressed since
  1198. it has to run directly from flash, so it will take more space to
  1199. store it. The flash address used to link the kernel object files,
  1200. and for storing it, is configuration dependent. Therefore, if you
  1201. say Y here, you must know the proper physical address where to
  1202. store the kernel image depending on your own flash memory usage.
  1203. Also note that the make target becomes "make xipImage" rather than
  1204. "make zImage" or "make Image". The final kernel binary to put in
  1205. ROM memory will be arch/arm/boot/xipImage.
  1206. If unsure, say N.
  1207. config XIP_PHYS_ADDR
  1208. hex "XIP Kernel Physical Location"
  1209. depends on XIP_KERNEL
  1210. default "0x00080000"
  1211. help
  1212. This is the physical address in your flash memory the kernel will
  1213. be linked for and stored to. This address is dependent on your
  1214. own flash usage.
  1215. config KEXEC
  1216. bool "Kexec system call (EXPERIMENTAL)"
  1217. depends on EXPERIMENTAL
  1218. help
  1219. kexec is a system call that implements the ability to shutdown your
  1220. current kernel, and to start another kernel. It is like a reboot
  1221. but it is independent of the system firmware. And like a reboot
  1222. you can start any kernel with it, not just Linux.
  1223. It is an ongoing process to be certain the hardware in a machine
  1224. is properly shutdown, so do not be surprised if this code does not
  1225. initially work for you. It may help to enable device hotplugging
  1226. support.
  1227. config ATAGS_PROC
  1228. bool "Export atags in procfs"
  1229. depends on KEXEC
  1230. default y
  1231. help
  1232. Should the atags used to boot the kernel be exported in an "atags"
  1233. file in procfs. Useful with kexec.
  1234. endmenu
  1235. menu "CPU Power Management"
  1236. if ARCH_HAS_CPUFREQ
  1237. source "drivers/cpufreq/Kconfig"
  1238. config CPU_FREQ_SA1100
  1239. bool
  1240. config CPU_FREQ_SA1110
  1241. bool
  1242. config CPU_FREQ_INTEGRATOR
  1243. tristate "CPUfreq driver for ARM Integrator CPUs"
  1244. depends on ARCH_INTEGRATOR && CPU_FREQ
  1245. default y
  1246. help
  1247. This enables the CPUfreq driver for ARM Integrator CPUs.
  1248. For details, take a look at <file:Documentation/cpu-freq>.
  1249. If in doubt, say Y.
  1250. config CPU_FREQ_PXA
  1251. bool
  1252. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1253. default y
  1254. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1255. config CPU_FREQ_S3C64XX
  1256. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1257. depends on CPU_FREQ && CPU_S3C6410
  1258. config CPU_FREQ_S3C
  1259. bool
  1260. help
  1261. Internal configuration node for common cpufreq on Samsung SoC
  1262. config CPU_FREQ_S3C24XX
  1263. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1264. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1265. select CPU_FREQ_S3C
  1266. help
  1267. This enables the CPUfreq driver for the Samsung S3C24XX family
  1268. of CPUs.
  1269. For details, take a look at <file:Documentation/cpu-freq>.
  1270. If in doubt, say N.
  1271. config CPU_FREQ_S3C24XX_PLL
  1272. bool "Support CPUfreq changing of PLL frequency"
  1273. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1274. help
  1275. Compile in support for changing the PLL frequency from the
  1276. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1277. after a frequency change, so by default it is not enabled.
  1278. This also means that the PLL tables for the selected CPU(s) will
  1279. be built which may increase the size of the kernel image.
  1280. config CPU_FREQ_S3C24XX_DEBUG
  1281. bool "Debug CPUfreq Samsung driver core"
  1282. depends on CPU_FREQ_S3C24XX
  1283. help
  1284. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1285. config CPU_FREQ_S3C24XX_IODEBUG
  1286. bool "Debug CPUfreq Samsung driver IO timing"
  1287. depends on CPU_FREQ_S3C24XX
  1288. help
  1289. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1290. config CPU_FREQ_S3C24XX_DEBUGFS
  1291. bool "Export debugfs for CPUFreq"
  1292. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1293. help
  1294. Export status information via debugfs.
  1295. endif
  1296. source "drivers/cpuidle/Kconfig"
  1297. endmenu
  1298. menu "Floating point emulation"
  1299. comment "At least one emulation must be selected"
  1300. config FPE_NWFPE
  1301. bool "NWFPE math emulation"
  1302. depends on !AEABI || OABI_COMPAT
  1303. ---help---
  1304. Say Y to include the NWFPE floating point emulator in the kernel.
  1305. This is necessary to run most binaries. Linux does not currently
  1306. support floating point hardware so you need to say Y here even if
  1307. your machine has an FPA or floating point co-processor podule.
  1308. You may say N here if you are going to load the Acorn FPEmulator
  1309. early in the bootup.
  1310. config FPE_NWFPE_XP
  1311. bool "Support extended precision"
  1312. depends on FPE_NWFPE
  1313. help
  1314. Say Y to include 80-bit support in the kernel floating-point
  1315. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1316. Note that gcc does not generate 80-bit operations by default,
  1317. so in most cases this option only enlarges the size of the
  1318. floating point emulator without any good reason.
  1319. You almost surely want to say N here.
  1320. config FPE_FASTFPE
  1321. bool "FastFPE math emulation (EXPERIMENTAL)"
  1322. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1323. ---help---
  1324. Say Y here to include the FAST floating point emulator in the kernel.
  1325. This is an experimental much faster emulator which now also has full
  1326. precision for the mantissa. It does not support any exceptions.
  1327. It is very simple, and approximately 3-6 times faster than NWFPE.
  1328. It should be sufficient for most programs. It may be not suitable
  1329. for scientific calculations, but you have to check this for yourself.
  1330. If you do not feel you need a faster FP emulation you should better
  1331. choose NWFPE.
  1332. config VFP
  1333. bool "VFP-format floating point maths"
  1334. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1335. help
  1336. Say Y to include VFP support code in the kernel. This is needed
  1337. if your hardware includes a VFP unit.
  1338. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1339. release notes and additional status information.
  1340. Say N if your target does not have VFP hardware.
  1341. config VFPv3
  1342. bool
  1343. depends on VFP
  1344. default y if CPU_V7
  1345. config NEON
  1346. bool "Advanced SIMD (NEON) Extension support"
  1347. depends on VFPv3 && CPU_V7
  1348. help
  1349. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1350. Extension.
  1351. endmenu
  1352. menu "Userspace binary formats"
  1353. source "fs/Kconfig.binfmt"
  1354. config ARTHUR
  1355. tristate "RISC OS personality"
  1356. depends on !AEABI
  1357. help
  1358. Say Y here to include the kernel code necessary if you want to run
  1359. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1360. experimental; if this sounds frightening, say N and sleep in peace.
  1361. You can also say M here to compile this support as a module (which
  1362. will be called arthur).
  1363. endmenu
  1364. menu "Power management options"
  1365. source "kernel/power/Kconfig"
  1366. config ARCH_SUSPEND_POSSIBLE
  1367. def_bool y
  1368. endmenu
  1369. source "net/Kconfig"
  1370. source "drivers/Kconfig"
  1371. source "fs/Kconfig"
  1372. source "arch/arm/Kconfig.debug"
  1373. source "security/Kconfig"
  1374. source "crypto/Kconfig"
  1375. source "lib/Kconfig"