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