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 ICST
  190. select GENERIC_TIME
  191. select GENERIC_CLOCKEVENTS
  192. select PLAT_VERSATILE
  193. help
  194. Support for ARM's Integrator platform.
  195. config ARCH_REALVIEW
  196. bool "ARM Ltd. RealView family"
  197. select ARM_AMBA
  198. select HAVE_CLK
  199. select COMMON_CLKDEV
  200. select ICST
  201. select GENERIC_TIME
  202. select GENERIC_CLOCKEVENTS
  203. select ARCH_WANT_OPTIONAL_GPIOLIB
  204. select PLAT_VERSATILE
  205. select ARM_TIMER_SP804
  206. help
  207. This enables support for ARM Ltd RealView boards.
  208. config ARCH_VERSATILE
  209. bool "ARM Ltd. Versatile family"
  210. select ARM_AMBA
  211. select ARM_VIC
  212. select HAVE_CLK
  213. select COMMON_CLKDEV
  214. select ICST
  215. select GENERIC_TIME
  216. select GENERIC_CLOCKEVENTS
  217. select ARCH_WANT_OPTIONAL_GPIOLIB
  218. select PLAT_VERSATILE
  219. select ARM_TIMER_SP804
  220. help
  221. This enables support for ARM Ltd Versatile board.
  222. config ARCH_VEXPRESS
  223. bool "ARM Ltd. Versatile Express family"
  224. select ARCH_WANT_OPTIONAL_GPIOLIB
  225. select ARM_AMBA
  226. select ARM_TIMER_SP804
  227. select COMMON_CLKDEV
  228. select GENERIC_CLOCKEVENTS
  229. select GENERIC_TIME
  230. select HAVE_CLK
  231. select ICST
  232. select PLAT_VERSATILE
  233. help
  234. This enables support for the ARM Ltd Versatile Express boards.
  235. config ARCH_AT91
  236. bool "Atmel AT91"
  237. select GENERIC_GPIO
  238. select ARCH_REQUIRE_GPIOLIB
  239. select HAVE_CLK
  240. help
  241. This enables support for systems based on the Atmel AT91RM9200,
  242. AT91SAM9 and AT91CAP9 processors.
  243. config ARCH_BCMRING
  244. bool "Broadcom BCMRING"
  245. depends on MMU
  246. select CPU_V6
  247. select ARM_AMBA
  248. select COMMON_CLKDEV
  249. select GENERIC_TIME
  250. select GENERIC_CLOCKEVENTS
  251. select ARCH_WANT_OPTIONAL_GPIOLIB
  252. help
  253. Support for Broadcom's BCMRing platform.
  254. config ARCH_CLPS711X
  255. bool "Cirrus Logic CLPS711x/EP721x-based"
  256. select CPU_ARM720T
  257. help
  258. Support for Cirrus Logic 711x/721x based boards.
  259. config ARCH_GEMINI
  260. bool "Cortina Systems Gemini"
  261. select CPU_FA526
  262. select GENERIC_GPIO
  263. select ARCH_REQUIRE_GPIOLIB
  264. help
  265. Support for the Cortina Systems Gemini family SoCs
  266. config ARCH_EBSA110
  267. bool "EBSA-110"
  268. select CPU_SA110
  269. select ISA
  270. select NO_IOPORT
  271. help
  272. This is an evaluation board for the StrongARM processor available
  273. from Digital. It has limited hardware on-board, including an
  274. Ethernet interface, two PCMCIA sockets, two serial ports and a
  275. parallel port.
  276. config ARCH_EP93XX
  277. bool "EP93xx-based"
  278. select CPU_ARM920T
  279. select ARM_AMBA
  280. select ARM_VIC
  281. select GENERIC_GPIO
  282. select HAVE_CLK
  283. select COMMON_CLKDEV
  284. select ARCH_REQUIRE_GPIOLIB
  285. select ARCH_HAS_HOLES_MEMORYMODEL
  286. help
  287. This enables support for the Cirrus EP93xx series of CPUs.
  288. config ARCH_FOOTBRIDGE
  289. bool "FootBridge"
  290. select CPU_SA110
  291. select FOOTBRIDGE
  292. help
  293. Support for systems based on the DC21285 companion chip
  294. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  295. config ARCH_MXC
  296. bool "Freescale MXC/iMX-based"
  297. select GENERIC_TIME
  298. select GENERIC_CLOCKEVENTS
  299. select ARCH_REQUIRE_GPIOLIB
  300. select HAVE_CLK
  301. select COMMON_CLKDEV
  302. help
  303. Support for Freescale MXC/iMX-based family of processors
  304. config ARCH_STMP3XXX
  305. bool "Freescale STMP3xxx"
  306. select CPU_ARM926T
  307. select HAVE_CLK
  308. select COMMON_CLKDEV
  309. select ARCH_REQUIRE_GPIOLIB
  310. select GENERIC_TIME
  311. select GENERIC_CLOCKEVENTS
  312. select GENERIC_GPIO
  313. select USB_ARCH_HAS_EHCI
  314. help
  315. Support for systems based on the Freescale 3xxx CPUs.
  316. config ARCH_NETX
  317. bool "Hilscher NetX based"
  318. select CPU_ARM926T
  319. select ARM_VIC
  320. select GENERIC_CLOCKEVENTS
  321. select GENERIC_TIME
  322. help
  323. This enables support for systems based on the Hilscher NetX Soc
  324. config ARCH_H720X
  325. bool "Hynix HMS720x-based"
  326. select CPU_ARM720T
  327. select ISA_DMA_API
  328. help
  329. This enables support for systems based on the Hynix HMS720x
  330. config ARCH_IOP13XX
  331. bool "IOP13xx-based"
  332. depends on MMU
  333. select CPU_XSC3
  334. select PLAT_IOP
  335. select PCI
  336. select ARCH_SUPPORTS_MSI
  337. select VMSPLIT_1G
  338. help
  339. Support for Intel's IOP13XX (XScale) family of processors.
  340. config ARCH_IOP32X
  341. bool "IOP32x-based"
  342. depends on MMU
  343. select CPU_XSCALE
  344. select PLAT_IOP
  345. select PCI
  346. select GENERIC_GPIO
  347. select ARCH_REQUIRE_GPIOLIB
  348. help
  349. Support for Intel's 80219 and IOP32X (XScale) family of
  350. processors.
  351. config ARCH_IOP33X
  352. bool "IOP33x-based"
  353. depends on MMU
  354. select CPU_XSCALE
  355. select PLAT_IOP
  356. select PCI
  357. select GENERIC_GPIO
  358. select ARCH_REQUIRE_GPIOLIB
  359. help
  360. Support for Intel's IOP33X (XScale) family of processors.
  361. config ARCH_IXP23XX
  362. bool "IXP23XX-based"
  363. depends on MMU
  364. select CPU_XSC3
  365. select PCI
  366. help
  367. Support for Intel's IXP23xx (XScale) family of processors.
  368. config ARCH_IXP2000
  369. bool "IXP2400/2800-based"
  370. depends on MMU
  371. select CPU_XSCALE
  372. select PCI
  373. help
  374. Support for Intel's IXP2400/2800 (XScale) family of processors.
  375. config ARCH_IXP4XX
  376. bool "IXP4xx-based"
  377. depends on MMU
  378. select CPU_XSCALE
  379. select GENERIC_GPIO
  380. select GENERIC_TIME
  381. select GENERIC_CLOCKEVENTS
  382. select DMABOUNCE if PCI
  383. help
  384. Support for Intel's IXP4XX (XScale) family of processors.
  385. config ARCH_L7200
  386. bool "LinkUp-L7200"
  387. select CPU_ARM720T
  388. select FIQ
  389. help
  390. Say Y here if you intend to run this kernel on a LinkUp Systems
  391. L7200 Software Development Board which uses an ARM720T processor.
  392. Information on this board can be obtained at:
  393. <http://www.linkupsys.com/>
  394. If you have any questions or comments about the Linux kernel port
  395. to this board, send e-mail to <sjhill@cotw.com>.
  396. config ARCH_DOVE
  397. bool "Marvell Dove"
  398. select PCI
  399. select GENERIC_GPIO
  400. select ARCH_REQUIRE_GPIOLIB
  401. select GENERIC_TIME
  402. select GENERIC_CLOCKEVENTS
  403. select PLAT_ORION
  404. help
  405. Support for the Marvell Dove SoC 88AP510
  406. config ARCH_KIRKWOOD
  407. bool "Marvell Kirkwood"
  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 Kirkwood series SoCs:
  417. 88F6180, 88F6192 and 88F6281.
  418. config ARCH_LOKI
  419. bool "Marvell Loki (88RC8480)"
  420. select CPU_FEROCEON
  421. select GENERIC_TIME
  422. select GENERIC_CLOCKEVENTS
  423. select PLAT_ORION
  424. help
  425. Support for the Marvell Loki (88RC8480) SoC.
  426. config ARCH_MV78XX0
  427. bool "Marvell MV78xx0"
  428. select CPU_FEROCEON
  429. select PCI
  430. select GENERIC_GPIO
  431. select ARCH_REQUIRE_GPIOLIB
  432. select GENERIC_TIME
  433. select GENERIC_CLOCKEVENTS
  434. select PLAT_ORION
  435. help
  436. Support for the following Marvell MV78xx0 series SoCs:
  437. MV781x0, MV782x0.
  438. config ARCH_ORION5X
  439. bool "Marvell Orion"
  440. depends on MMU
  441. select CPU_FEROCEON
  442. select PCI
  443. select GENERIC_GPIO
  444. select ARCH_REQUIRE_GPIOLIB
  445. select GENERIC_TIME
  446. select GENERIC_CLOCKEVENTS
  447. select PLAT_ORION
  448. help
  449. Support for the following Marvell Orion 5x series SoCs:
  450. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  451. Orion-2 (5281), Orion-1-90 (6183).
  452. config ARCH_MMP
  453. bool "Marvell PXA168/910/MMP2"
  454. depends on MMU
  455. select GENERIC_GPIO
  456. select ARCH_REQUIRE_GPIOLIB
  457. select HAVE_CLK
  458. select COMMON_CLKDEV
  459. select GENERIC_TIME
  460. select GENERIC_CLOCKEVENTS
  461. select TICK_ONESHOT
  462. select PLAT_PXA
  463. help
  464. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  465. config ARCH_KS8695
  466. bool "Micrel/Kendin KS8695"
  467. select CPU_ARM922T
  468. select GENERIC_GPIO
  469. select ARCH_REQUIRE_GPIOLIB
  470. help
  471. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  472. System-on-Chip devices.
  473. config ARCH_NS9XXX
  474. bool "NetSilicon NS9xxx"
  475. select CPU_ARM926T
  476. select GENERIC_GPIO
  477. select GENERIC_TIME
  478. select GENERIC_CLOCKEVENTS
  479. select HAVE_CLK
  480. help
  481. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  482. System.
  483. <http://www.digi.com/products/microprocessors/index.jsp>
  484. config ARCH_W90X900
  485. bool "Nuvoton W90X900 CPU"
  486. select CPU_ARM926T
  487. select ARCH_REQUIRE_GPIOLIB
  488. select GENERIC_GPIO
  489. select HAVE_CLK
  490. select COMMON_CLKDEV
  491. select GENERIC_TIME
  492. select GENERIC_CLOCKEVENTS
  493. help
  494. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  495. At present, the w90x900 has been renamed nuc900, regarding
  496. the ARM series product line, you can login the following
  497. link address to know more.
  498. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  499. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  500. config ARCH_NUC93X
  501. bool "Nuvoton NUC93X CPU"
  502. select CPU_ARM926T
  503. select HAVE_CLK
  504. select COMMON_CLKDEV
  505. help
  506. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  507. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  508. config ARCH_PNX4008
  509. bool "Philips Nexperia PNX4008 Mobile"
  510. select CPU_ARM926T
  511. select HAVE_CLK
  512. select COMMON_CLKDEV
  513. help
  514. This enables support for Philips PNX4008 mobile platform.
  515. config ARCH_PXA
  516. bool "PXA2xx/PXA3xx-based"
  517. depends on MMU
  518. select ARCH_MTD_XIP
  519. select ARCH_HAS_CPUFREQ
  520. select GENERIC_GPIO
  521. select HAVE_CLK
  522. select COMMON_CLKDEV
  523. select ARCH_REQUIRE_GPIOLIB
  524. select GENERIC_TIME
  525. select GENERIC_CLOCKEVENTS
  526. select TICK_ONESHOT
  527. select PLAT_PXA
  528. help
  529. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  530. config ARCH_MSM
  531. bool "Qualcomm MSM"
  532. select CPU_V6
  533. select GENERIC_TIME
  534. select GENERIC_CLOCKEVENTS
  535. help
  536. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  537. apps processor of the MSM7K and depends on a shared memory
  538. interface to the ARM9 modem processor which runs the baseband stack
  539. and controls some vital subsystems (clock and power control, etc).
  540. config ARCH_SHMOBILE
  541. bool "Renesas SH-Mobile"
  542. help
  543. Support for Renesas's SH-Mobile ARM platforms
  544. config ARCH_RPC
  545. bool "RiscPC"
  546. select ARCH_ACORN
  547. select FIQ
  548. select TIMER_ACORN
  549. select ARCH_MAY_HAVE_PC_FDC
  550. select HAVE_PATA_PLATFORM
  551. select ISA_DMA_API
  552. select NO_IOPORT
  553. select ARCH_SPARSEMEM_ENABLE
  554. help
  555. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  556. CD-ROM interface, serial and parallel port, and the floppy drive.
  557. config ARCH_SA1100
  558. bool "SA1100-based"
  559. select CPU_SA1100
  560. select ISA
  561. select ARCH_SPARSEMEM_ENABLE
  562. select ARCH_MTD_XIP
  563. select ARCH_HAS_CPUFREQ
  564. select CPU_FREQ
  565. select GENERIC_GPIO
  566. select GENERIC_TIME
  567. select GENERIC_CLOCKEVENTS
  568. select HAVE_CLK
  569. select TICK_ONESHOT
  570. select ARCH_REQUIRE_GPIOLIB
  571. help
  572. Support for StrongARM 11x0 based boards.
  573. config ARCH_S3C2410
  574. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  575. select GENERIC_GPIO
  576. select ARCH_HAS_CPUFREQ
  577. select HAVE_CLK
  578. help
  579. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  580. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  581. the Samsung SMDK2410 development board (and derivatives).
  582. config ARCH_S3C64XX
  583. bool "Samsung S3C64XX"
  584. select PLAT_SAMSUNG
  585. select CPU_V6
  586. select GENERIC_GPIO
  587. select ARM_VIC
  588. select HAVE_CLK
  589. select NO_IOPORT
  590. select ARCH_HAS_CPUFREQ
  591. select ARCH_REQUIRE_GPIOLIB
  592. select SAMSUNG_CLKSRC
  593. select SAMSUNG_IRQ_VIC_TIMER
  594. select SAMSUNG_IRQ_UART
  595. select S3C_GPIO_TRACK
  596. select S3C_GPIO_PULL_UPDOWN
  597. select S3C_GPIO_CFG_S3C24XX
  598. select S3C_GPIO_CFG_S3C64XX
  599. select S3C_DEV_NAND
  600. select USB_ARCH_HAS_OHCI
  601. select SAMSUNG_GPIOLIB_4BIT
  602. help
  603. Samsung S3C64XX series based systems
  604. config ARCH_S5P6440
  605. bool "Samsung S5P6440"
  606. select CPU_V6
  607. select GENERIC_GPIO
  608. select HAVE_CLK
  609. help
  610. Samsung S5P6440 CPU based systems
  611. config ARCH_S5P6442
  612. bool "Samsung S5P6442"
  613. select CPU_V6
  614. select GENERIC_GPIO
  615. select HAVE_CLK
  616. help
  617. Samsung S5P6442 CPU based systems
  618. config ARCH_S5PC1XX
  619. bool "Samsung S5PC1XX"
  620. select GENERIC_GPIO
  621. select HAVE_CLK
  622. select CPU_V7
  623. select ARM_L1_CACHE_SHIFT_6
  624. help
  625. Samsung S5PC1XX series based systems
  626. config ARCH_S5PV210
  627. bool "Samsung S5PV210/S5PC110"
  628. select CPU_V7
  629. select GENERIC_GPIO
  630. select HAVE_CLK
  631. select ARM_L1_CACHE_SHIFT_6
  632. help
  633. Samsung S5PV210/S5PC110 series based systems
  634. config ARCH_SHARK
  635. bool "Shark"
  636. select CPU_SA110
  637. select ISA
  638. select ISA_DMA
  639. select ZONE_DMA
  640. select PCI
  641. help
  642. Support for the StrongARM based Digital DNARD machine, also known
  643. as "Shark" (<http://www.shark-linux.de/shark.html>).
  644. config ARCH_LH7A40X
  645. bool "Sharp LH7A40X"
  646. select CPU_ARM922T
  647. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  648. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  649. help
  650. Say Y here for systems based on one of the Sharp LH7A40X
  651. System on a Chip processors. These CPUs include an ARM922T
  652. core with a wide array of integrated devices for
  653. hand-held and low-power applications.
  654. config ARCH_U300
  655. bool "ST-Ericsson U300 Series"
  656. depends on MMU
  657. select CPU_ARM926T
  658. select HAVE_TCM
  659. select ARM_AMBA
  660. select ARM_VIC
  661. select GENERIC_TIME
  662. select GENERIC_CLOCKEVENTS
  663. select HAVE_CLK
  664. select COMMON_CLKDEV
  665. select GENERIC_GPIO
  666. help
  667. Support for ST-Ericsson U300 series mobile platforms.
  668. config ARCH_U8500
  669. bool "ST-Ericsson U8500 Series"
  670. select CPU_V7
  671. select ARM_AMBA
  672. select GENERIC_TIME
  673. select GENERIC_CLOCKEVENTS
  674. select COMMON_CLKDEV
  675. help
  676. Support for ST-Ericsson's Ux500 architecture
  677. config ARCH_NOMADIK
  678. bool "STMicroelectronics Nomadik"
  679. select ARM_AMBA
  680. select ARM_VIC
  681. select CPU_ARM926T
  682. select HAVE_CLK
  683. select COMMON_CLKDEV
  684. select GENERIC_TIME
  685. select GENERIC_CLOCKEVENTS
  686. select GENERIC_GPIO
  687. select ARCH_REQUIRE_GPIOLIB
  688. help
  689. Support for the Nomadik platform by ST-Ericsson
  690. config ARCH_DAVINCI
  691. bool "TI DaVinci"
  692. select CPU_ARM926T
  693. select GENERIC_TIME
  694. select GENERIC_CLOCKEVENTS
  695. select GENERIC_GPIO
  696. select ARCH_REQUIRE_GPIOLIB
  697. select HAVE_CLK
  698. select ZONE_DMA
  699. select HAVE_IDE
  700. select COMMON_CLKDEV
  701. select GENERIC_ALLOCATOR
  702. select ARCH_HAS_HOLES_MEMORYMODEL
  703. help
  704. Support for TI's DaVinci platform.
  705. config ARCH_OMAP
  706. bool "TI OMAP"
  707. select GENERIC_GPIO
  708. select HAVE_CLK
  709. select ARCH_REQUIRE_GPIOLIB
  710. select ARCH_HAS_CPUFREQ
  711. select GENERIC_TIME
  712. select GENERIC_CLOCKEVENTS
  713. select ARCH_HAS_HOLES_MEMORYMODEL
  714. help
  715. Support for TI's OMAP platform (OMAP1 and OMAP2).
  716. endchoice
  717. #
  718. # This is sorted alphabetically by mach-* pathname. However, plat-*
  719. # Kconfigs may be included either alphabetically (according to the
  720. # plat- suffix) or along side the corresponding mach-* source.
  721. #
  722. source "arch/arm/mach-aaec2000/Kconfig"
  723. source "arch/arm/mach-at91/Kconfig"
  724. source "arch/arm/mach-bcmring/Kconfig"
  725. source "arch/arm/mach-clps711x/Kconfig"
  726. source "arch/arm/mach-davinci/Kconfig"
  727. source "arch/arm/mach-dove/Kconfig"
  728. source "arch/arm/mach-ep93xx/Kconfig"
  729. source "arch/arm/mach-footbridge/Kconfig"
  730. source "arch/arm/mach-gemini/Kconfig"
  731. source "arch/arm/mach-h720x/Kconfig"
  732. source "arch/arm/mach-integrator/Kconfig"
  733. source "arch/arm/mach-iop32x/Kconfig"
  734. source "arch/arm/mach-iop33x/Kconfig"
  735. source "arch/arm/mach-iop13xx/Kconfig"
  736. source "arch/arm/mach-ixp4xx/Kconfig"
  737. source "arch/arm/mach-ixp2000/Kconfig"
  738. source "arch/arm/mach-ixp23xx/Kconfig"
  739. source "arch/arm/mach-kirkwood/Kconfig"
  740. source "arch/arm/mach-ks8695/Kconfig"
  741. source "arch/arm/mach-lh7a40x/Kconfig"
  742. source "arch/arm/mach-loki/Kconfig"
  743. source "arch/arm/mach-msm/Kconfig"
  744. source "arch/arm/mach-mv78xx0/Kconfig"
  745. source "arch/arm/plat-mxc/Kconfig"
  746. source "arch/arm/mach-netx/Kconfig"
  747. source "arch/arm/mach-nomadik/Kconfig"
  748. source "arch/arm/plat-nomadik/Kconfig"
  749. source "arch/arm/mach-ns9xxx/Kconfig"
  750. source "arch/arm/mach-nuc93x/Kconfig"
  751. source "arch/arm/plat-omap/Kconfig"
  752. source "arch/arm/mach-omap1/Kconfig"
  753. source "arch/arm/mach-omap2/Kconfig"
  754. source "arch/arm/mach-orion5x/Kconfig"
  755. source "arch/arm/mach-pxa/Kconfig"
  756. source "arch/arm/plat-pxa/Kconfig"
  757. source "arch/arm/mach-mmp/Kconfig"
  758. source "arch/arm/mach-realview/Kconfig"
  759. source "arch/arm/mach-sa1100/Kconfig"
  760. source "arch/arm/plat-samsung/Kconfig"
  761. source "arch/arm/plat-s3c24xx/Kconfig"
  762. source "arch/arm/plat-s5p/Kconfig"
  763. source "arch/arm/plat-s5pc1xx/Kconfig"
  764. if ARCH_S3C2410
  765. source "arch/arm/mach-s3c2400/Kconfig"
  766. source "arch/arm/mach-s3c2410/Kconfig"
  767. source "arch/arm/mach-s3c2412/Kconfig"
  768. source "arch/arm/mach-s3c2440/Kconfig"
  769. source "arch/arm/mach-s3c2443/Kconfig"
  770. endif
  771. if ARCH_S3C64XX
  772. source "arch/arm/mach-s3c64xx/Kconfig"
  773. endif
  774. source "arch/arm/mach-s5p6440/Kconfig"
  775. source "arch/arm/mach-s5p6442/Kconfig"
  776. if ARCH_S5PC1XX
  777. source "arch/arm/mach-s5pc100/Kconfig"
  778. endif
  779. source "arch/arm/mach-s5pv210/Kconfig"
  780. source "arch/arm/mach-shmobile/Kconfig"
  781. source "arch/arm/plat-stmp3xxx/Kconfig"
  782. source "arch/arm/mach-u300/Kconfig"
  783. source "arch/arm/mach-ux500/Kconfig"
  784. source "arch/arm/mach-versatile/Kconfig"
  785. source "arch/arm/mach-vexpress/Kconfig"
  786. source "arch/arm/mach-w90x900/Kconfig"
  787. # Definitions to make life easier
  788. config ARCH_ACORN
  789. bool
  790. config PLAT_IOP
  791. bool
  792. select GENERIC_CLOCKEVENTS
  793. select GENERIC_TIME
  794. config PLAT_ORION
  795. bool
  796. config PLAT_PXA
  797. bool
  798. config PLAT_VERSATILE
  799. bool
  800. config ARM_TIMER_SP804
  801. bool
  802. source arch/arm/mm/Kconfig
  803. config IWMMXT
  804. bool "Enable iWMMXt support"
  805. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  806. default y if PXA27x || PXA3xx || ARCH_MMP
  807. help
  808. Enable support for iWMMXt context switching at run time if
  809. running on a CPU that supports it.
  810. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  811. config XSCALE_PMU
  812. bool
  813. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  814. default y
  815. config CPU_HAS_PMU
  816. depends on CPU_V6 || CPU_V7 || XSCALE_PMU
  817. default y
  818. bool
  819. if !MMU
  820. source "arch/arm/Kconfig-nommu"
  821. endif
  822. config ARM_ERRATA_411920
  823. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  824. depends on CPU_V6 && !SMP
  825. help
  826. Invalidation of the Instruction Cache operation can
  827. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  828. It does not affect the MPCore. This option enables the ARM Ltd.
  829. recommended workaround.
  830. config ARM_ERRATA_430973
  831. bool "ARM errata: Stale prediction on replaced interworking branch"
  832. depends on CPU_V7
  833. help
  834. This option enables the workaround for the 430973 Cortex-A8
  835. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  836. interworking branch is replaced with another code sequence at the
  837. same virtual address, whether due to self-modifying code or virtual
  838. to physical address re-mapping, Cortex-A8 does not recover from the
  839. stale interworking branch prediction. This results in Cortex-A8
  840. executing the new code sequence in the incorrect ARM or Thumb state.
  841. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  842. and also flushes the branch target cache at every context switch.
  843. Note that setting specific bits in the ACTLR register may not be
  844. available in non-secure mode.
  845. config ARM_ERRATA_458693
  846. bool "ARM errata: Processor deadlock when a false hazard is created"
  847. depends on CPU_V7
  848. help
  849. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  850. erratum. For very specific sequences of memory operations, it is
  851. possible for a hazard condition intended for a cache line to instead
  852. be incorrectly associated with a different cache line. This false
  853. hazard might then cause a processor deadlock. The workaround enables
  854. the L1 caching of the NEON accesses and disables the PLD instruction
  855. in the ACTLR register. Note that setting specific bits in the ACTLR
  856. register may not be available in non-secure mode.
  857. config ARM_ERRATA_460075
  858. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  859. depends on CPU_V7
  860. help
  861. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  862. erratum. Any asynchronous access to the L2 cache may encounter a
  863. situation in which recent store transactions to the L2 cache are lost
  864. and overwritten with stale memory contents from external memory. The
  865. workaround disables the write-allocate mode for the L2 cache via the
  866. ACTLR register. Note that setting specific bits in the ACTLR register
  867. may not be available in non-secure mode.
  868. config PL310_ERRATA_588369
  869. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  870. depends on CACHE_L2X0 && ARCH_OMAP4
  871. help
  872. The PL310 L2 cache controller implements three types of Clean &
  873. Invalidate maintenance operations: by Physical Address
  874. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  875. They are architecturally defined to behave as the execution of a
  876. clean operation followed immediately by an invalidate operation,
  877. both performing to the same memory location. This functionality
  878. is not correctly implemented in PL310 as clean lines are not
  879. invalidated as a result of these operations. Note that this errata
  880. uses Texas Instrument's secure monitor api.
  881. endmenu
  882. source "arch/arm/common/Kconfig"
  883. config FORCE_MAX_ZONEORDER
  884. int
  885. depends on SA1111
  886. default "9"
  887. menu "Bus support"
  888. config ARM_AMBA
  889. bool
  890. config ISA
  891. bool
  892. help
  893. Find out whether you have ISA slots on your motherboard. ISA is the
  894. name of a bus system, i.e. the way the CPU talks to the other stuff
  895. inside your box. Other bus systems are PCI, EISA, MicroChannel
  896. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  897. newer boards don't support it. If you have ISA, say Y, otherwise N.
  898. # Select ISA DMA controller support
  899. config ISA_DMA
  900. bool
  901. select ISA_DMA_API
  902. # Select ISA DMA interface
  903. config ISA_DMA_API
  904. bool
  905. config PCI
  906. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  907. help
  908. Find out whether you have a PCI motherboard. PCI is the name of a
  909. bus system, i.e. the way the CPU talks to the other stuff inside
  910. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  911. VESA. If you have PCI, say Y, otherwise N.
  912. config PCI_SYSCALL
  913. def_bool PCI
  914. # Select the host bridge type
  915. config PCI_HOST_VIA82C505
  916. bool
  917. depends on PCI && ARCH_SHARK
  918. default y
  919. config PCI_HOST_ITE8152
  920. bool
  921. depends on PCI && MACH_ARMCORE
  922. default y
  923. select DMABOUNCE
  924. source "drivers/pci/Kconfig"
  925. source "drivers/pcmcia/Kconfig"
  926. endmenu
  927. menu "Kernel Features"
  928. source "kernel/time/Kconfig"
  929. config SMP
  930. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  931. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  932. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  933. depends on GENERIC_CLOCKEVENTS
  934. select USE_GENERIC_SMP_HELPERS
  935. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  936. help
  937. This enables support for systems with more than one CPU. If you have
  938. a system with only one CPU, like most personal computers, say N. If
  939. you have a system with more than one CPU, say Y.
  940. If you say N here, the kernel will run on single and multiprocessor
  941. machines, but will use only one CPU of a multiprocessor machine. If
  942. you say Y here, the kernel will run on many, but not all, single
  943. processor machines. On a single processor machine, the kernel will
  944. run faster if you say N here.
  945. See also <file:Documentation/i386/IO-APIC.txt>,
  946. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  947. <http://www.linuxdoc.org/docs.html#howto>.
  948. If you don't know what to do here, say N.
  949. config HAVE_ARM_SCU
  950. bool
  951. depends on SMP
  952. help
  953. This option enables support for the ARM system coherency unit
  954. config HAVE_ARM_TWD
  955. bool
  956. depends on SMP
  957. help
  958. This options enables support for the ARM timer and watchdog unit
  959. choice
  960. prompt "Memory split"
  961. default VMSPLIT_3G
  962. help
  963. Select the desired split between kernel and user memory.
  964. If you are not absolutely sure what you are doing, leave this
  965. option alone!
  966. config VMSPLIT_3G
  967. bool "3G/1G user/kernel split"
  968. config VMSPLIT_2G
  969. bool "2G/2G user/kernel split"
  970. config VMSPLIT_1G
  971. bool "1G/3G user/kernel split"
  972. endchoice
  973. config PAGE_OFFSET
  974. hex
  975. default 0x40000000 if VMSPLIT_1G
  976. default 0x80000000 if VMSPLIT_2G
  977. default 0xC0000000
  978. config NR_CPUS
  979. int "Maximum number of CPUs (2-32)"
  980. range 2 32
  981. depends on SMP
  982. default "4"
  983. config HOTPLUG_CPU
  984. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  985. depends on SMP && HOTPLUG && EXPERIMENTAL
  986. help
  987. Say Y here to experiment with turning CPUs off and on. CPUs
  988. can be controlled through /sys/devices/system/cpu.
  989. config LOCAL_TIMERS
  990. bool "Use local timer interrupts"
  991. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  992. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  993. default y
  994. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  995. help
  996. Enable support for local timers on SMP platforms, rather then the
  997. legacy IPI broadcast method. Local timers allows the system
  998. accounting to be spread across the timer interval, preventing a
  999. "thundering herd" at every timer tick.
  1000. source kernel/Kconfig.preempt
  1001. config HZ
  1002. int
  1003. default 128 if ARCH_L7200
  1004. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
  1005. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1006. default AT91_TIMER_HZ if ARCH_AT91
  1007. default 100
  1008. config THUMB2_KERNEL
  1009. bool "Compile the kernel in Thumb-2 mode"
  1010. depends on CPU_V7 && EXPERIMENTAL
  1011. select AEABI
  1012. select ARM_ASM_UNIFIED
  1013. help
  1014. By enabling this option, the kernel will be compiled in
  1015. Thumb-2 mode. A compiler/assembler that understand the unified
  1016. ARM-Thumb syntax is needed.
  1017. If unsure, say N.
  1018. config ARM_ASM_UNIFIED
  1019. bool
  1020. config AEABI
  1021. bool "Use the ARM EABI to compile the kernel"
  1022. help
  1023. This option allows for the kernel to be compiled using the latest
  1024. ARM ABI (aka EABI). This is only useful if you are using a user
  1025. space environment that is also compiled with EABI.
  1026. Since there are major incompatibilities between the legacy ABI and
  1027. EABI, especially with regard to structure member alignment, this
  1028. option also changes the kernel syscall calling convention to
  1029. disambiguate both ABIs and allow for backward compatibility support
  1030. (selected with CONFIG_OABI_COMPAT).
  1031. To use this you need GCC version 4.0.0 or later.
  1032. config OABI_COMPAT
  1033. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1034. depends on AEABI && EXPERIMENTAL
  1035. default y
  1036. help
  1037. This option preserves the old syscall interface along with the
  1038. new (ARM EABI) one. It also provides a compatibility layer to
  1039. intercept syscalls that have structure arguments which layout
  1040. in memory differs between the legacy ABI and the new ARM EABI
  1041. (only for non "thumb" binaries). This option adds a tiny
  1042. overhead to all syscalls and produces a slightly larger kernel.
  1043. If you know you'll be using only pure EABI user space then you
  1044. can say N here. If this option is not selected and you attempt
  1045. to execute a legacy ABI binary then the result will be
  1046. UNPREDICTABLE (in fact it can be predicted that it won't work
  1047. at all). If in doubt say Y.
  1048. config ARCH_HAS_HOLES_MEMORYMODEL
  1049. bool
  1050. # Discontigmem is deprecated
  1051. config ARCH_DISCONTIGMEM_ENABLE
  1052. bool
  1053. config ARCH_SPARSEMEM_ENABLE
  1054. bool
  1055. config ARCH_SPARSEMEM_DEFAULT
  1056. def_bool ARCH_SPARSEMEM_ENABLE
  1057. config ARCH_SELECT_MEMORY_MODEL
  1058. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  1059. config NODES_SHIFT
  1060. int
  1061. default "4" if ARCH_LH7A40X
  1062. default "2"
  1063. depends on NEED_MULTIPLE_NODES
  1064. config HIGHMEM
  1065. bool "High Memory Support (EXPERIMENTAL)"
  1066. depends on MMU && EXPERIMENTAL
  1067. help
  1068. The address space of ARM processors is only 4 Gigabytes large
  1069. and it has to accommodate user address space, kernel address
  1070. space as well as some memory mapped IO. That means that, if you
  1071. have a large amount of physical memory and/or IO, not all of the
  1072. memory can be "permanently mapped" by the kernel. The physical
  1073. memory that is not permanently mapped is called "high memory".
  1074. Depending on the selected kernel/user memory split, minimum
  1075. vmalloc space and actual amount of RAM, you may not need this
  1076. option which should result in a slightly faster kernel.
  1077. If unsure, say n.
  1078. config HIGHPTE
  1079. bool "Allocate 2nd-level pagetables from highmem"
  1080. depends on HIGHMEM
  1081. depends on !OUTER_CACHE
  1082. config HW_PERF_EVENTS
  1083. bool "Enable hardware performance counter support for perf events"
  1084. depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
  1085. default y
  1086. help
  1087. Enable hardware performance counter support for perf events. If
  1088. disabled, perf events will use software events only.
  1089. source "mm/Kconfig"
  1090. config LEDS
  1091. bool "Timer and CPU usage LEDs"
  1092. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1093. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1094. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1095. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1096. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1097. ARCH_AT91 || ARCH_DAVINCI || \
  1098. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1099. help
  1100. If you say Y here, the LEDs on your machine will be used
  1101. to provide useful information about your current system status.
  1102. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1103. be able to select which LEDs are active using the options below. If
  1104. you are compiling a kernel for the EBSA-110 or the LART however, the
  1105. red LED will simply flash regularly to indicate that the system is
  1106. still functional. It is safe to say Y here if you have a CATS
  1107. system, but the driver will do nothing.
  1108. config LEDS_TIMER
  1109. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1110. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1111. || MACH_OMAP_PERSEUS2
  1112. depends on LEDS
  1113. depends on !GENERIC_CLOCKEVENTS
  1114. default y if ARCH_EBSA110
  1115. help
  1116. If you say Y here, one of the system LEDs (the green one on the
  1117. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1118. will flash regularly to indicate that the system is still
  1119. operational. This is mainly useful to kernel hackers who are
  1120. debugging unstable kernels.
  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 LEDS_CPU
  1125. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1126. !ARCH_OMAP) \
  1127. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1128. || MACH_OMAP_PERSEUS2
  1129. depends on LEDS
  1130. help
  1131. If you say Y here, the red LED will be used to give a good real
  1132. time indication of CPU usage, by lighting whenever the idle task
  1133. is not currently executing.
  1134. The LART uses the same LED for both Timer LED and CPU usage LED
  1135. functions. You may choose to use both, but the Timer LED function
  1136. will overrule the CPU usage LED.
  1137. config ALIGNMENT_TRAP
  1138. bool
  1139. depends on CPU_CP15_MMU
  1140. default y if !ARCH_EBSA110
  1141. select HAVE_PROC_CPU if PROC_FS
  1142. help
  1143. ARM processors cannot fetch/store information which is not
  1144. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1145. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1146. fetch/store instructions will be emulated in software if you say
  1147. here, which has a severe performance impact. This is necessary for
  1148. correct operation of some network protocols. With an IP-only
  1149. configuration it is safe to say N, otherwise say Y.
  1150. config UACCESS_WITH_MEMCPY
  1151. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1152. depends on MMU && EXPERIMENTAL
  1153. default y if CPU_FEROCEON
  1154. help
  1155. Implement faster copy_to_user and clear_user methods for CPU
  1156. cores where a 8-word STM instruction give significantly higher
  1157. memory write throughput than a sequence of individual 32bit stores.
  1158. A possible side effect is a slight increase in scheduling latency
  1159. between threads sharing the same address space if they invoke
  1160. such copy operations with large buffers.
  1161. However, if the CPU data cache is using a write-allocate mode,
  1162. this option is unlikely to provide any performance gain.
  1163. endmenu
  1164. menu "Boot options"
  1165. # Compressed boot loader in ROM. Yes, we really want to ask about
  1166. # TEXT and BSS so we preserve their values in the config files.
  1167. config ZBOOT_ROM_TEXT
  1168. hex "Compressed ROM boot loader base address"
  1169. default "0"
  1170. help
  1171. The physical address at which the ROM-able zImage is to be
  1172. placed in the target. Platforms which normally make use of
  1173. ROM-able zImage formats normally set this to a suitable
  1174. value in their defconfig file.
  1175. If ZBOOT_ROM is not enabled, this has no effect.
  1176. config ZBOOT_ROM_BSS
  1177. hex "Compressed ROM boot loader BSS address"
  1178. default "0"
  1179. help
  1180. The base address of an area of read/write memory in the target
  1181. for the ROM-able zImage which must be available while the
  1182. decompressor is running. It must be large enough to hold the
  1183. entire decompressed kernel plus an additional 128 KiB.
  1184. Platforms which normally make use of ROM-able zImage formats
  1185. normally set this to a suitable value in their defconfig file.
  1186. If ZBOOT_ROM is not enabled, this has no effect.
  1187. config ZBOOT_ROM
  1188. bool "Compressed boot loader in ROM/flash"
  1189. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1190. help
  1191. Say Y here if you intend to execute your compressed kernel image
  1192. (zImage) directly from ROM or flash. If unsure, say N.
  1193. config CMDLINE
  1194. string "Default kernel command string"
  1195. default ""
  1196. help
  1197. On some architectures (EBSA110 and CATS), there is currently no way
  1198. for the boot loader to pass arguments to the kernel. For these
  1199. architectures, you should supply some command-line options at build
  1200. time by entering them here. As a minimum, you should specify the
  1201. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1202. config XIP_KERNEL
  1203. bool "Kernel Execute-In-Place from ROM"
  1204. depends on !ZBOOT_ROM
  1205. help
  1206. Execute-In-Place allows the kernel to run from non-volatile storage
  1207. directly addressable by the CPU, such as NOR flash. This saves RAM
  1208. space since the text section of the kernel is not loaded from flash
  1209. to RAM. Read-write sections, such as the data section and stack,
  1210. are still copied to RAM. The XIP kernel is not compressed since
  1211. it has to run directly from flash, so it will take more space to
  1212. store it. The flash address used to link the kernel object files,
  1213. and for storing it, is configuration dependent. Therefore, if you
  1214. say Y here, you must know the proper physical address where to
  1215. store the kernel image depending on your own flash memory usage.
  1216. Also note that the make target becomes "make xipImage" rather than
  1217. "make zImage" or "make Image". The final kernel binary to put in
  1218. ROM memory will be arch/arm/boot/xipImage.
  1219. If unsure, say N.
  1220. config XIP_PHYS_ADDR
  1221. hex "XIP Kernel Physical Location"
  1222. depends on XIP_KERNEL
  1223. default "0x00080000"
  1224. help
  1225. This is the physical address in your flash memory the kernel will
  1226. be linked for and stored to. This address is dependent on your
  1227. own flash usage.
  1228. config KEXEC
  1229. bool "Kexec system call (EXPERIMENTAL)"
  1230. depends on EXPERIMENTAL
  1231. help
  1232. kexec is a system call that implements the ability to shutdown your
  1233. current kernel, and to start another kernel. It is like a reboot
  1234. but it is independent of the system firmware. And like a reboot
  1235. you can start any kernel with it, not just Linux.
  1236. It is an ongoing process to be certain the hardware in a machine
  1237. is properly shutdown, so do not be surprised if this code does not
  1238. initially work for you. It may help to enable device hotplugging
  1239. support.
  1240. config ATAGS_PROC
  1241. bool "Export atags in procfs"
  1242. depends on KEXEC
  1243. default y
  1244. help
  1245. Should the atags used to boot the kernel be exported in an "atags"
  1246. file in procfs. Useful with kexec.
  1247. endmenu
  1248. menu "CPU Power Management"
  1249. if ARCH_HAS_CPUFREQ
  1250. source "drivers/cpufreq/Kconfig"
  1251. config CPU_FREQ_SA1100
  1252. bool
  1253. config CPU_FREQ_SA1110
  1254. bool
  1255. config CPU_FREQ_INTEGRATOR
  1256. tristate "CPUfreq driver for ARM Integrator CPUs"
  1257. depends on ARCH_INTEGRATOR && CPU_FREQ
  1258. default y
  1259. help
  1260. This enables the CPUfreq driver for ARM Integrator CPUs.
  1261. For details, take a look at <file:Documentation/cpu-freq>.
  1262. If in doubt, say Y.
  1263. config CPU_FREQ_PXA
  1264. bool
  1265. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1266. default y
  1267. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1268. config CPU_FREQ_S3C64XX
  1269. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1270. depends on CPU_FREQ && CPU_S3C6410
  1271. config CPU_FREQ_S3C
  1272. bool
  1273. help
  1274. Internal configuration node for common cpufreq on Samsung SoC
  1275. config CPU_FREQ_S3C24XX
  1276. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1277. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1278. select CPU_FREQ_S3C
  1279. help
  1280. This enables the CPUfreq driver for the Samsung S3C24XX family
  1281. of CPUs.
  1282. For details, take a look at <file:Documentation/cpu-freq>.
  1283. If in doubt, say N.
  1284. config CPU_FREQ_S3C24XX_PLL
  1285. bool "Support CPUfreq changing of PLL frequency"
  1286. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1287. help
  1288. Compile in support for changing the PLL frequency from the
  1289. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1290. after a frequency change, so by default it is not enabled.
  1291. This also means that the PLL tables for the selected CPU(s) will
  1292. be built which may increase the size of the kernel image.
  1293. config CPU_FREQ_S3C24XX_DEBUG
  1294. bool "Debug CPUfreq Samsung driver core"
  1295. depends on CPU_FREQ_S3C24XX
  1296. help
  1297. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1298. config CPU_FREQ_S3C24XX_IODEBUG
  1299. bool "Debug CPUfreq Samsung driver IO timing"
  1300. depends on CPU_FREQ_S3C24XX
  1301. help
  1302. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1303. config CPU_FREQ_S3C24XX_DEBUGFS
  1304. bool "Export debugfs for CPUFreq"
  1305. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1306. help
  1307. Export status information via debugfs.
  1308. endif
  1309. source "drivers/cpuidle/Kconfig"
  1310. endmenu
  1311. menu "Floating point emulation"
  1312. comment "At least one emulation must be selected"
  1313. config FPE_NWFPE
  1314. bool "NWFPE math emulation"
  1315. depends on !AEABI || OABI_COMPAT
  1316. ---help---
  1317. Say Y to include the NWFPE floating point emulator in the kernel.
  1318. This is necessary to run most binaries. Linux does not currently
  1319. support floating point hardware so you need to say Y here even if
  1320. your machine has an FPA or floating point co-processor podule.
  1321. You may say N here if you are going to load the Acorn FPEmulator
  1322. early in the bootup.
  1323. config FPE_NWFPE_XP
  1324. bool "Support extended precision"
  1325. depends on FPE_NWFPE
  1326. help
  1327. Say Y to include 80-bit support in the kernel floating-point
  1328. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1329. Note that gcc does not generate 80-bit operations by default,
  1330. so in most cases this option only enlarges the size of the
  1331. floating point emulator without any good reason.
  1332. You almost surely want to say N here.
  1333. config FPE_FASTFPE
  1334. bool "FastFPE math emulation (EXPERIMENTAL)"
  1335. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1336. ---help---
  1337. Say Y here to include the FAST floating point emulator in the kernel.
  1338. This is an experimental much faster emulator which now also has full
  1339. precision for the mantissa. It does not support any exceptions.
  1340. It is very simple, and approximately 3-6 times faster than NWFPE.
  1341. It should be sufficient for most programs. It may be not suitable
  1342. for scientific calculations, but you have to check this for yourself.
  1343. If you do not feel you need a faster FP emulation you should better
  1344. choose NWFPE.
  1345. config VFP
  1346. bool "VFP-format floating point maths"
  1347. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1348. help
  1349. Say Y to include VFP support code in the kernel. This is needed
  1350. if your hardware includes a VFP unit.
  1351. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1352. release notes and additional status information.
  1353. Say N if your target does not have VFP hardware.
  1354. config VFPv3
  1355. bool
  1356. depends on VFP
  1357. default y if CPU_V7
  1358. config NEON
  1359. bool "Advanced SIMD (NEON) Extension support"
  1360. depends on VFPv3 && CPU_V7
  1361. help
  1362. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1363. Extension.
  1364. endmenu
  1365. menu "Userspace binary formats"
  1366. source "fs/Kconfig.binfmt"
  1367. config ARTHUR
  1368. tristate "RISC OS personality"
  1369. depends on !AEABI
  1370. help
  1371. Say Y here to include the kernel code necessary if you want to run
  1372. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1373. experimental; if this sounds frightening, say N and sleep in peace.
  1374. You can also say M here to compile this support as a module (which
  1375. will be called arthur).
  1376. endmenu
  1377. menu "Power management options"
  1378. source "kernel/power/Kconfig"
  1379. config ARCH_SUSPEND_POSSIBLE
  1380. def_bool y
  1381. endmenu
  1382. source "net/Kconfig"
  1383. source "drivers/Kconfig"
  1384. source "fs/Kconfig"
  1385. source "arch/arm/Kconfig.debug"
  1386. source "security/Kconfig"
  1387. source "crypto/Kconfig"
  1388. source "lib/Kconfig"