Kconfig 44 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 if (HAVE_PERF_EVENTS)
  15. select HAVE_ARCH_KGDB
  16. select HAVE_KPROBES if (!XIP_KERNEL)
  17. select HAVE_KRETPROBES if (HAVE_KPROBES)
  18. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  19. select HAVE_GENERIC_DMA_COHERENT
  20. select HAVE_KERNEL_GZIP
  21. select HAVE_KERNEL_LZO
  22. select HAVE_KERNEL_LZMA
  23. select HAVE_PERF_EVENTS
  24. select PERF_USE_VMALLOC
  25. help
  26. The ARM series is a line of low-power-consumption RISC chip designs
  27. licensed by ARM Ltd and targeted at embedded applications and
  28. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  29. manufactured, but legacy ARM-based PC hardware remains popular in
  30. Europe. There is an ARM Linux project with a web page at
  31. <http://www.arm.linux.org.uk/>.
  32. config HAVE_PWM
  33. bool
  34. config SYS_SUPPORTS_APM_EMULATION
  35. bool
  36. config GENERIC_GPIO
  37. bool
  38. config GENERIC_TIME
  39. bool
  40. default y
  41. config ARCH_USES_GETTIMEOFFSET
  42. bool
  43. default n
  44. config GENERIC_CLOCKEVENTS
  45. bool
  46. config GENERIC_CLOCKEVENTS_BROADCAST
  47. bool
  48. depends on GENERIC_CLOCKEVENTS
  49. default y if SMP && !LOCAL_TIMERS
  50. config HAVE_TCM
  51. bool
  52. select GENERIC_ALLOCATOR
  53. config HAVE_PROC_CPU
  54. bool
  55. config NO_IOPORT
  56. bool
  57. config EISA
  58. bool
  59. ---help---
  60. The Extended Industry Standard Architecture (EISA) bus was
  61. developed as an open alternative to the IBM MicroChannel bus.
  62. The EISA bus provided some of the features of the IBM MicroChannel
  63. bus while maintaining backward compatibility with cards made for
  64. the older ISA bus. The EISA bus saw limited use between 1988 and
  65. 1995 when it was made obsolete by the PCI bus.
  66. Say Y here if you are building a kernel for an EISA-based machine.
  67. Otherwise, say N.
  68. config SBUS
  69. bool
  70. config MCA
  71. bool
  72. help
  73. MicroChannel Architecture is found in some IBM PS/2 machines and
  74. laptops. It is a bus system similar to PCI or ISA. See
  75. <file:Documentation/mca.txt> (and especially the web page given
  76. there) before attempting to build an MCA bus kernel.
  77. config GENERIC_HARDIRQS
  78. bool
  79. default y
  80. config STACKTRACE_SUPPORT
  81. bool
  82. default y
  83. config HAVE_LATENCYTOP_SUPPORT
  84. bool
  85. depends on !SMP
  86. default y
  87. config LOCKDEP_SUPPORT
  88. bool
  89. default y
  90. config TRACE_IRQFLAGS_SUPPORT
  91. bool
  92. default y
  93. config HARDIRQS_SW_RESEND
  94. bool
  95. default y
  96. config GENERIC_IRQ_PROBE
  97. bool
  98. default y
  99. config GENERIC_LOCKBREAK
  100. bool
  101. default y
  102. depends on SMP && PREEMPT
  103. config RWSEM_GENERIC_SPINLOCK
  104. bool
  105. default y
  106. config RWSEM_XCHGADD_ALGORITHM
  107. bool
  108. config ARCH_HAS_ILOG2_U32
  109. bool
  110. config ARCH_HAS_ILOG2_U64
  111. bool
  112. config ARCH_HAS_CPUFREQ
  113. bool
  114. help
  115. Internal node to signify that the ARCH has CPUFREQ support
  116. and that the relevant menu configurations are displayed for
  117. it.
  118. config GENERIC_HWEIGHT
  119. bool
  120. default y
  121. config GENERIC_CALIBRATE_DELAY
  122. bool
  123. default y
  124. config ARCH_MAY_HAVE_PC_FDC
  125. bool
  126. config ZONE_DMA
  127. bool
  128. config NEED_DMA_MAP_STATE
  129. def_bool y
  130. config GENERIC_ISA_DMA
  131. bool
  132. config FIQ
  133. bool
  134. config ARCH_MTD_XIP
  135. bool
  136. config GENERIC_HARDIRQS_NO__DO_IRQ
  137. def_bool y
  138. config ARM_L1_CACHE_SHIFT_6
  139. bool
  140. help
  141. Setting ARM L1 cache line size to 64 Bytes.
  142. config VECTORS_BASE
  143. hex
  144. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  145. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  146. default 0x00000000
  147. help
  148. The base address of exception vectors.
  149. source "init/Kconfig"
  150. source "kernel/Kconfig.freezer"
  151. menu "System Type"
  152. config MMU
  153. bool "MMU-based Paged Memory Management Support"
  154. default y
  155. help
  156. Select if you want MMU-based virtualised addressing space
  157. support by paged memory management. If unsure, say 'Y'.
  158. #
  159. # The "ARM system type" choice list is ordered alphabetically by option
  160. # text. Please add new entries in the option alphabetic order.
  161. #
  162. choice
  163. prompt "ARM system type"
  164. default ARCH_VERSATILE
  165. config ARCH_AAEC2000
  166. bool "Agilent AAEC-2000 based"
  167. select CPU_ARM920T
  168. select ARM_AMBA
  169. select HAVE_CLK
  170. select ARCH_USES_GETTIMEOFFSET
  171. help
  172. This enables support for systems based on the Agilent AAEC-2000
  173. config ARCH_INTEGRATOR
  174. bool "ARM Ltd. Integrator family"
  175. select ARM_AMBA
  176. select ARCH_HAS_CPUFREQ
  177. select COMMON_CLKDEV
  178. select ICST
  179. select GENERIC_CLOCKEVENTS
  180. select PLAT_VERSATILE
  181. help
  182. Support for ARM's Integrator platform.
  183. config ARCH_REALVIEW
  184. bool "ARM Ltd. RealView family"
  185. select ARM_AMBA
  186. select COMMON_CLKDEV
  187. select ICST
  188. select GENERIC_CLOCKEVENTS
  189. select ARCH_WANT_OPTIONAL_GPIOLIB
  190. select PLAT_VERSATILE
  191. select ARM_TIMER_SP804
  192. select GPIO_PL061 if GPIOLIB
  193. help
  194. This enables support for ARM Ltd RealView boards.
  195. config ARCH_VERSATILE
  196. bool "ARM Ltd. Versatile family"
  197. select ARM_AMBA
  198. select ARM_VIC
  199. select COMMON_CLKDEV
  200. select ICST
  201. select GENERIC_CLOCKEVENTS
  202. select ARCH_WANT_OPTIONAL_GPIOLIB
  203. select PLAT_VERSATILE
  204. select ARM_TIMER_SP804
  205. help
  206. This enables support for ARM Ltd Versatile board.
  207. config ARCH_VEXPRESS
  208. bool "ARM Ltd. Versatile Express family"
  209. select ARCH_WANT_OPTIONAL_GPIOLIB
  210. select ARM_AMBA
  211. select ARM_TIMER_SP804
  212. select COMMON_CLKDEV
  213. select GENERIC_CLOCKEVENTS
  214. select HAVE_CLK
  215. select ICST
  216. select PLAT_VERSATILE
  217. help
  218. This enables support for the ARM Ltd Versatile Express boards.
  219. config ARCH_AT91
  220. bool "Atmel AT91"
  221. select ARCH_REQUIRE_GPIOLIB
  222. select HAVE_CLK
  223. select ARCH_USES_GETTIMEOFFSET
  224. help
  225. This enables support for systems based on the Atmel AT91RM9200,
  226. AT91SAM9 and AT91CAP9 processors.
  227. config ARCH_BCMRING
  228. bool "Broadcom BCMRING"
  229. depends on MMU
  230. select CPU_V6
  231. select ARM_AMBA
  232. select COMMON_CLKDEV
  233. select GENERIC_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_CNS3XXX
  244. bool "Cavium Networks CNS3XXX family"
  245. select CPU_V6
  246. select GENERIC_CLOCKEVENTS
  247. select ARM_GIC
  248. help
  249. Support for Cavium Networks CNS3XXX platform.
  250. config ARCH_GEMINI
  251. bool "Cortina Systems Gemini"
  252. select CPU_FA526
  253. select ARCH_REQUIRE_GPIOLIB
  254. select ARCH_USES_GETTIMEOFFSET
  255. help
  256. Support for the Cortina Systems Gemini family SoCs
  257. config ARCH_EBSA110
  258. bool "EBSA-110"
  259. select CPU_SA110
  260. select ISA
  261. select NO_IOPORT
  262. select ARCH_USES_GETTIMEOFFSET
  263. help
  264. This is an evaluation board for the StrongARM processor available
  265. from Digital. It has limited hardware on-board, including an
  266. Ethernet interface, two PCMCIA sockets, two serial ports and a
  267. parallel port.
  268. config ARCH_EP93XX
  269. bool "EP93xx-based"
  270. select CPU_ARM920T
  271. select ARM_AMBA
  272. select ARM_VIC
  273. select COMMON_CLKDEV
  274. select ARCH_REQUIRE_GPIOLIB
  275. select ARCH_HAS_HOLES_MEMORYMODEL
  276. select ARCH_USES_GETTIMEOFFSET
  277. help
  278. This enables support for the Cirrus EP93xx series of CPUs.
  279. config ARCH_FOOTBRIDGE
  280. bool "FootBridge"
  281. select CPU_SA110
  282. select FOOTBRIDGE
  283. select ARCH_USES_GETTIMEOFFSET
  284. help
  285. Support for systems based on the DC21285 companion chip
  286. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  287. config ARCH_MXC
  288. bool "Freescale MXC/iMX-based"
  289. select GENERIC_CLOCKEVENTS
  290. select ARCH_REQUIRE_GPIOLIB
  291. select COMMON_CLKDEV
  292. help
  293. Support for Freescale MXC/iMX-based family of processors
  294. config ARCH_STMP3XXX
  295. bool "Freescale STMP3xxx"
  296. select CPU_ARM926T
  297. select COMMON_CLKDEV
  298. select ARCH_REQUIRE_GPIOLIB
  299. select GENERIC_CLOCKEVENTS
  300. select USB_ARCH_HAS_EHCI
  301. help
  302. Support for systems based on the Freescale 3xxx CPUs.
  303. config ARCH_NETX
  304. bool "Hilscher NetX based"
  305. select CPU_ARM926T
  306. select ARM_VIC
  307. select GENERIC_CLOCKEVENTS
  308. help
  309. This enables support for systems based on the Hilscher NetX Soc
  310. config ARCH_H720X
  311. bool "Hynix HMS720x-based"
  312. select CPU_ARM720T
  313. select ISA_DMA_API
  314. select ARCH_USES_GETTIMEOFFSET
  315. help
  316. This enables support for systems based on the Hynix HMS720x
  317. config ARCH_IOP13XX
  318. bool "IOP13xx-based"
  319. depends on MMU
  320. select CPU_XSC3
  321. select PLAT_IOP
  322. select PCI
  323. select ARCH_SUPPORTS_MSI
  324. select VMSPLIT_1G
  325. help
  326. Support for Intel's IOP13XX (XScale) family of processors.
  327. config ARCH_IOP32X
  328. bool "IOP32x-based"
  329. depends on MMU
  330. select CPU_XSCALE
  331. select PLAT_IOP
  332. select PCI
  333. select 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 ARCH_REQUIRE_GPIOLIB
  344. help
  345. Support for Intel's IOP33X (XScale) family of processors.
  346. config ARCH_IXP23XX
  347. bool "IXP23XX-based"
  348. depends on MMU
  349. select CPU_XSC3
  350. select PCI
  351. select ARCH_USES_GETTIMEOFFSET
  352. help
  353. Support for Intel's IXP23xx (XScale) family of processors.
  354. config ARCH_IXP2000
  355. bool "IXP2400/2800-based"
  356. depends on MMU
  357. select CPU_XSCALE
  358. select PCI
  359. select ARCH_USES_GETTIMEOFFSET
  360. help
  361. Support for Intel's IXP2400/2800 (XScale) family of processors.
  362. config ARCH_IXP4XX
  363. bool "IXP4xx-based"
  364. depends on MMU
  365. select CPU_XSCALE
  366. select GENERIC_GPIO
  367. select GENERIC_CLOCKEVENTS
  368. select DMABOUNCE if PCI
  369. help
  370. Support for Intel's IXP4XX (XScale) family of processors.
  371. config ARCH_L7200
  372. bool "LinkUp-L7200"
  373. select CPU_ARM720T
  374. select FIQ
  375. select ARCH_USES_GETTIMEOFFSET
  376. help
  377. Say Y here if you intend to run this kernel on a LinkUp Systems
  378. L7200 Software Development Board which uses an ARM720T processor.
  379. Information on this board can be obtained at:
  380. <http://www.linkupsys.com/>
  381. If you have any questions or comments about the Linux kernel port
  382. to this board, send e-mail to <sjhill@cotw.com>.
  383. config ARCH_DOVE
  384. bool "Marvell Dove"
  385. select PCI
  386. select ARCH_REQUIRE_GPIOLIB
  387. select GENERIC_CLOCKEVENTS
  388. select PLAT_ORION
  389. help
  390. Support for the Marvell Dove SoC 88AP510
  391. config ARCH_KIRKWOOD
  392. bool "Marvell Kirkwood"
  393. select CPU_FEROCEON
  394. select PCI
  395. select ARCH_REQUIRE_GPIOLIB
  396. select GENERIC_CLOCKEVENTS
  397. select PLAT_ORION
  398. help
  399. Support for the following Marvell Kirkwood series SoCs:
  400. 88F6180, 88F6192 and 88F6281.
  401. config ARCH_LOKI
  402. bool "Marvell Loki (88RC8480)"
  403. select CPU_FEROCEON
  404. select GENERIC_CLOCKEVENTS
  405. select PLAT_ORION
  406. help
  407. Support for the Marvell Loki (88RC8480) SoC.
  408. config ARCH_MV78XX0
  409. bool "Marvell MV78xx0"
  410. select CPU_FEROCEON
  411. select PCI
  412. select ARCH_REQUIRE_GPIOLIB
  413. select GENERIC_CLOCKEVENTS
  414. select PLAT_ORION
  415. help
  416. Support for the following Marvell MV78xx0 series SoCs:
  417. MV781x0, MV782x0.
  418. config ARCH_ORION5X
  419. bool "Marvell Orion"
  420. depends on MMU
  421. select CPU_FEROCEON
  422. select PCI
  423. select ARCH_REQUIRE_GPIOLIB
  424. select GENERIC_CLOCKEVENTS
  425. select PLAT_ORION
  426. help
  427. Support for the following Marvell Orion 5x series SoCs:
  428. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  429. Orion-2 (5281), Orion-1-90 (6183).
  430. config ARCH_MMP
  431. bool "Marvell PXA168/910/MMP2"
  432. depends on MMU
  433. select ARCH_REQUIRE_GPIOLIB
  434. select COMMON_CLKDEV
  435. select GENERIC_CLOCKEVENTS
  436. select TICK_ONESHOT
  437. select PLAT_PXA
  438. help
  439. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  440. config ARCH_KS8695
  441. bool "Micrel/Kendin KS8695"
  442. select CPU_ARM922T
  443. select ARCH_REQUIRE_GPIOLIB
  444. select ARCH_USES_GETTIMEOFFSET
  445. help
  446. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  447. System-on-Chip devices.
  448. config ARCH_NS9XXX
  449. bool "NetSilicon NS9xxx"
  450. select CPU_ARM926T
  451. select GENERIC_GPIO
  452. select GENERIC_CLOCKEVENTS
  453. select HAVE_CLK
  454. help
  455. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  456. System.
  457. <http://www.digi.com/products/microprocessors/index.jsp>
  458. config ARCH_W90X900
  459. bool "Nuvoton W90X900 CPU"
  460. select CPU_ARM926T
  461. select ARCH_REQUIRE_GPIOLIB
  462. select COMMON_CLKDEV
  463. select GENERIC_CLOCKEVENTS
  464. help
  465. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  466. At present, the w90x900 has been renamed nuc900, regarding
  467. the ARM series product line, you can login the following
  468. link address to know more.
  469. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  470. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  471. config ARCH_NUC93X
  472. bool "Nuvoton NUC93X CPU"
  473. select CPU_ARM926T
  474. select COMMON_CLKDEV
  475. help
  476. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  477. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  478. config ARCH_PNX4008
  479. bool "Philips Nexperia PNX4008 Mobile"
  480. select CPU_ARM926T
  481. select COMMON_CLKDEV
  482. select ARCH_USES_GETTIMEOFFSET
  483. help
  484. This enables support for Philips PNX4008 mobile platform.
  485. config ARCH_PXA
  486. bool "PXA2xx/PXA3xx-based"
  487. depends on MMU
  488. select ARCH_MTD_XIP
  489. select ARCH_HAS_CPUFREQ
  490. select COMMON_CLKDEV
  491. select ARCH_REQUIRE_GPIOLIB
  492. select GENERIC_CLOCKEVENTS
  493. select TICK_ONESHOT
  494. select PLAT_PXA
  495. help
  496. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  497. config ARCH_MSM
  498. bool "Qualcomm MSM"
  499. select HAVE_CLK
  500. select GENERIC_CLOCKEVENTS
  501. help
  502. Support for Qualcomm MSM/QSD based systems. This runs on the
  503. apps processor of the MSM/QSD and depends on a shared memory
  504. interface to the modem processor which runs the baseband
  505. stack and controls some vital subsystems
  506. (clock and power control, etc).
  507. config ARCH_SHMOBILE
  508. bool "Renesas SH-Mobile"
  509. help
  510. Support for Renesas's SH-Mobile ARM platforms
  511. config ARCH_RPC
  512. bool "RiscPC"
  513. select ARCH_ACORN
  514. select FIQ
  515. select TIMER_ACORN
  516. select ARCH_MAY_HAVE_PC_FDC
  517. select HAVE_PATA_PLATFORM
  518. select ISA_DMA_API
  519. select NO_IOPORT
  520. select ARCH_SPARSEMEM_ENABLE
  521. select ARCH_USES_GETTIMEOFFSET
  522. help
  523. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  524. CD-ROM interface, serial and parallel port, and the floppy drive.
  525. config ARCH_SA1100
  526. bool "SA1100-based"
  527. select CPU_SA1100
  528. select ISA
  529. select ARCH_SPARSEMEM_ENABLE
  530. select ARCH_MTD_XIP
  531. select ARCH_HAS_CPUFREQ
  532. select CPU_FREQ
  533. select GENERIC_CLOCKEVENTS
  534. select HAVE_CLK
  535. select TICK_ONESHOT
  536. select ARCH_REQUIRE_GPIOLIB
  537. help
  538. Support for StrongARM 11x0 based boards.
  539. config ARCH_S3C2410
  540. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  541. select GENERIC_GPIO
  542. select ARCH_HAS_CPUFREQ
  543. select HAVE_CLK
  544. select ARCH_USES_GETTIMEOFFSET
  545. help
  546. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  547. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  548. the Samsung SMDK2410 development board (and derivatives).
  549. Note, the S3C2416 and the S3C2450 are so close that they even share
  550. the same SoC ID code. This means that there is no seperate machine
  551. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  552. config ARCH_S3C64XX
  553. bool "Samsung S3C64XX"
  554. select PLAT_SAMSUNG
  555. select CPU_V6
  556. select ARM_VIC
  557. select HAVE_CLK
  558. select NO_IOPORT
  559. select ARCH_USES_GETTIMEOFFSET
  560. select ARCH_HAS_CPUFREQ
  561. select ARCH_REQUIRE_GPIOLIB
  562. select SAMSUNG_CLKSRC
  563. select SAMSUNG_IRQ_VIC_TIMER
  564. select SAMSUNG_IRQ_UART
  565. select S3C_GPIO_TRACK
  566. select S3C_GPIO_PULL_UPDOWN
  567. select S3C_GPIO_CFG_S3C24XX
  568. select S3C_GPIO_CFG_S3C64XX
  569. select S3C_DEV_NAND
  570. select USB_ARCH_HAS_OHCI
  571. select SAMSUNG_GPIOLIB_4BIT
  572. help
  573. Samsung S3C64XX series based systems
  574. config ARCH_S5P6440
  575. bool "Samsung S5P6440"
  576. select CPU_V6
  577. select GENERIC_GPIO
  578. select HAVE_CLK
  579. select ARCH_USES_GETTIMEOFFSET
  580. help
  581. Samsung S5P6440 CPU based systems
  582. config ARCH_S5P6442
  583. bool "Samsung S5P6442"
  584. select CPU_V6
  585. select GENERIC_GPIO
  586. select HAVE_CLK
  587. select ARCH_USES_GETTIMEOFFSET
  588. help
  589. Samsung S5P6442 CPU based systems
  590. config ARCH_S5PC100
  591. bool "Samsung S5PC100"
  592. select GENERIC_GPIO
  593. select HAVE_CLK
  594. select CPU_V7
  595. select ARM_L1_CACHE_SHIFT_6
  596. select ARCH_USES_GETTIMEOFFSET
  597. help
  598. Samsung S5PC100 series based systems
  599. config ARCH_S5PV210
  600. bool "Samsung S5PV210/S5PC110"
  601. select CPU_V7
  602. select GENERIC_GPIO
  603. select HAVE_CLK
  604. select ARM_L1_CACHE_SHIFT_6
  605. select ARCH_USES_GETTIMEOFFSET
  606. help
  607. Samsung S5PV210/S5PC110 series based systems
  608. config ARCH_SHARK
  609. bool "Shark"
  610. select CPU_SA110
  611. select ISA
  612. select ISA_DMA
  613. select ZONE_DMA
  614. select PCI
  615. select ARCH_USES_GETTIMEOFFSET
  616. help
  617. Support for the StrongARM based Digital DNARD machine, also known
  618. as "Shark" (<http://www.shark-linux.de/shark.html>).
  619. config ARCH_LH7A40X
  620. bool "Sharp LH7A40X"
  621. select CPU_ARM922T
  622. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  623. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  624. select ARCH_USES_GETTIMEOFFSET
  625. help
  626. Say Y here for systems based on one of the Sharp LH7A40X
  627. System on a Chip processors. These CPUs include an ARM922T
  628. core with a wide array of integrated devices for
  629. hand-held and low-power applications.
  630. config ARCH_U300
  631. bool "ST-Ericsson U300 Series"
  632. depends on MMU
  633. select CPU_ARM926T
  634. select HAVE_TCM
  635. select ARM_AMBA
  636. select ARM_VIC
  637. select GENERIC_CLOCKEVENTS
  638. select COMMON_CLKDEV
  639. select GENERIC_GPIO
  640. help
  641. Support for ST-Ericsson U300 series mobile platforms.
  642. config ARCH_U8500
  643. bool "ST-Ericsson U8500 Series"
  644. select CPU_V7
  645. select ARM_AMBA
  646. select GENERIC_CLOCKEVENTS
  647. select COMMON_CLKDEV
  648. select ARCH_REQUIRE_GPIOLIB
  649. help
  650. Support for ST-Ericsson's Ux500 architecture
  651. config ARCH_NOMADIK
  652. bool "STMicroelectronics Nomadik"
  653. select ARM_AMBA
  654. select ARM_VIC
  655. select CPU_ARM926T
  656. select COMMON_CLKDEV
  657. select GENERIC_CLOCKEVENTS
  658. select ARCH_REQUIRE_GPIOLIB
  659. help
  660. Support for the Nomadik platform by ST-Ericsson
  661. config ARCH_DAVINCI
  662. bool "TI DaVinci"
  663. select GENERIC_CLOCKEVENTS
  664. select ARCH_REQUIRE_GPIOLIB
  665. select ZONE_DMA
  666. select HAVE_IDE
  667. select COMMON_CLKDEV
  668. select GENERIC_ALLOCATOR
  669. select ARCH_HAS_HOLES_MEMORYMODEL
  670. help
  671. Support for TI's DaVinci platform.
  672. config ARCH_OMAP
  673. bool "TI OMAP"
  674. select HAVE_CLK
  675. select ARCH_REQUIRE_GPIOLIB
  676. select ARCH_HAS_CPUFREQ
  677. select GENERIC_CLOCKEVENTS
  678. select ARCH_HAS_HOLES_MEMORYMODEL
  679. help
  680. Support for TI's OMAP platform (OMAP1 and OMAP2).
  681. config PLAT_SPEAR
  682. bool "ST SPEAr"
  683. select ARM_AMBA
  684. select ARCH_REQUIRE_GPIOLIB
  685. select COMMON_CLKDEV
  686. select GENERIC_CLOCKEVENTS
  687. select HAVE_CLK
  688. help
  689. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  690. endchoice
  691. #
  692. # This is sorted alphabetically by mach-* pathname. However, plat-*
  693. # Kconfigs may be included either alphabetically (according to the
  694. # plat- suffix) or along side the corresponding mach-* source.
  695. #
  696. source "arch/arm/mach-aaec2000/Kconfig"
  697. source "arch/arm/mach-at91/Kconfig"
  698. source "arch/arm/mach-bcmring/Kconfig"
  699. source "arch/arm/mach-clps711x/Kconfig"
  700. source "arch/arm/mach-cns3xxx/Kconfig"
  701. source "arch/arm/mach-davinci/Kconfig"
  702. source "arch/arm/mach-dove/Kconfig"
  703. source "arch/arm/mach-ep93xx/Kconfig"
  704. source "arch/arm/mach-footbridge/Kconfig"
  705. source "arch/arm/mach-gemini/Kconfig"
  706. source "arch/arm/mach-h720x/Kconfig"
  707. source "arch/arm/mach-integrator/Kconfig"
  708. source "arch/arm/mach-iop32x/Kconfig"
  709. source "arch/arm/mach-iop33x/Kconfig"
  710. source "arch/arm/mach-iop13xx/Kconfig"
  711. source "arch/arm/mach-ixp4xx/Kconfig"
  712. source "arch/arm/mach-ixp2000/Kconfig"
  713. source "arch/arm/mach-ixp23xx/Kconfig"
  714. source "arch/arm/mach-kirkwood/Kconfig"
  715. source "arch/arm/mach-ks8695/Kconfig"
  716. source "arch/arm/mach-lh7a40x/Kconfig"
  717. source "arch/arm/mach-loki/Kconfig"
  718. source "arch/arm/mach-msm/Kconfig"
  719. source "arch/arm/mach-mv78xx0/Kconfig"
  720. source "arch/arm/plat-mxc/Kconfig"
  721. source "arch/arm/mach-netx/Kconfig"
  722. source "arch/arm/mach-nomadik/Kconfig"
  723. source "arch/arm/plat-nomadik/Kconfig"
  724. source "arch/arm/mach-ns9xxx/Kconfig"
  725. source "arch/arm/mach-nuc93x/Kconfig"
  726. source "arch/arm/plat-omap/Kconfig"
  727. source "arch/arm/mach-omap1/Kconfig"
  728. source "arch/arm/mach-omap2/Kconfig"
  729. source "arch/arm/mach-orion5x/Kconfig"
  730. source "arch/arm/mach-pxa/Kconfig"
  731. source "arch/arm/plat-pxa/Kconfig"
  732. source "arch/arm/mach-mmp/Kconfig"
  733. source "arch/arm/mach-realview/Kconfig"
  734. source "arch/arm/mach-sa1100/Kconfig"
  735. source "arch/arm/plat-samsung/Kconfig"
  736. source "arch/arm/plat-s3c24xx/Kconfig"
  737. source "arch/arm/plat-s5p/Kconfig"
  738. source "arch/arm/plat-spear/Kconfig"
  739. if ARCH_S3C2410
  740. source "arch/arm/mach-s3c2400/Kconfig"
  741. source "arch/arm/mach-s3c2410/Kconfig"
  742. source "arch/arm/mach-s3c2412/Kconfig"
  743. source "arch/arm/mach-s3c2416/Kconfig"
  744. source "arch/arm/mach-s3c2440/Kconfig"
  745. source "arch/arm/mach-s3c2443/Kconfig"
  746. endif
  747. if ARCH_S3C64XX
  748. source "arch/arm/mach-s3c64xx/Kconfig"
  749. endif
  750. source "arch/arm/mach-s5p6440/Kconfig"
  751. source "arch/arm/mach-s5p6442/Kconfig"
  752. source "arch/arm/mach-s5pc100/Kconfig"
  753. source "arch/arm/mach-s5pv210/Kconfig"
  754. source "arch/arm/mach-shmobile/Kconfig"
  755. source "arch/arm/plat-stmp3xxx/Kconfig"
  756. source "arch/arm/mach-u300/Kconfig"
  757. source "arch/arm/mach-ux500/Kconfig"
  758. source "arch/arm/mach-versatile/Kconfig"
  759. source "arch/arm/mach-vexpress/Kconfig"
  760. source "arch/arm/mach-w90x900/Kconfig"
  761. # Definitions to make life easier
  762. config ARCH_ACORN
  763. bool
  764. config PLAT_IOP
  765. bool
  766. select GENERIC_CLOCKEVENTS
  767. config PLAT_ORION
  768. bool
  769. config PLAT_PXA
  770. bool
  771. config PLAT_VERSATILE
  772. bool
  773. config ARM_TIMER_SP804
  774. bool
  775. source arch/arm/mm/Kconfig
  776. config IWMMXT
  777. bool "Enable iWMMXt support"
  778. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  779. default y if PXA27x || PXA3xx || ARCH_MMP
  780. help
  781. Enable support for iWMMXt context switching at run time if
  782. running on a CPU that supports it.
  783. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  784. config XSCALE_PMU
  785. bool
  786. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  787. default y
  788. config CPU_HAS_PMU
  789. depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
  790. (!ARCH_OMAP3 || OMAP3_EMU)
  791. default y
  792. bool
  793. if !MMU
  794. source "arch/arm/Kconfig-nommu"
  795. endif
  796. config ARM_ERRATA_411920
  797. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  798. depends on CPU_V6 && !SMP
  799. help
  800. Invalidation of the Instruction Cache operation can
  801. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  802. It does not affect the MPCore. This option enables the ARM Ltd.
  803. recommended workaround.
  804. config ARM_ERRATA_430973
  805. bool "ARM errata: Stale prediction on replaced interworking branch"
  806. depends on CPU_V7
  807. help
  808. This option enables the workaround for the 430973 Cortex-A8
  809. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  810. interworking branch is replaced with another code sequence at the
  811. same virtual address, whether due to self-modifying code or virtual
  812. to physical address re-mapping, Cortex-A8 does not recover from the
  813. stale interworking branch prediction. This results in Cortex-A8
  814. executing the new code sequence in the incorrect ARM or Thumb state.
  815. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  816. and also flushes the branch target cache at every context switch.
  817. Note that setting specific bits in the ACTLR register may not be
  818. available in non-secure mode.
  819. config ARM_ERRATA_458693
  820. bool "ARM errata: Processor deadlock when a false hazard is created"
  821. depends on CPU_V7
  822. help
  823. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  824. erratum. For very specific sequences of memory operations, it is
  825. possible for a hazard condition intended for a cache line to instead
  826. be incorrectly associated with a different cache line. This false
  827. hazard might then cause a processor deadlock. The workaround enables
  828. the L1 caching of the NEON accesses and disables the PLD instruction
  829. in the ACTLR register. Note that setting specific bits in the ACTLR
  830. register may not be available in non-secure mode.
  831. config ARM_ERRATA_460075
  832. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  833. depends on CPU_V7
  834. help
  835. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  836. erratum. Any asynchronous access to the L2 cache may encounter a
  837. situation in which recent store transactions to the L2 cache are lost
  838. and overwritten with stale memory contents from external memory. The
  839. workaround disables the write-allocate mode for the L2 cache via the
  840. ACTLR register. Note that setting specific bits in the ACTLR register
  841. may not be available in non-secure mode.
  842. config PL310_ERRATA_588369
  843. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  844. depends on CACHE_L2X0 && ARCH_OMAP4
  845. help
  846. The PL310 L2 cache controller implements three types of Clean &
  847. Invalidate maintenance operations: by Physical Address
  848. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  849. They are architecturally defined to behave as the execution of a
  850. clean operation followed immediately by an invalidate operation,
  851. both performing to the same memory location. This functionality
  852. is not correctly implemented in PL310 as clean lines are not
  853. invalidated as a result of these operations. Note that this errata
  854. uses Texas Instrument's secure monitor api.
  855. endmenu
  856. source "arch/arm/common/Kconfig"
  857. config FORCE_MAX_ZONEORDER
  858. int
  859. depends on SA1111
  860. default "9"
  861. menu "Bus support"
  862. config ARM_AMBA
  863. bool
  864. config ISA
  865. bool
  866. help
  867. Find out whether you have ISA slots on your motherboard. ISA is the
  868. name of a bus system, i.e. the way the CPU talks to the other stuff
  869. inside your box. Other bus systems are PCI, EISA, MicroChannel
  870. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  871. newer boards don't support it. If you have ISA, say Y, otherwise N.
  872. # Select ISA DMA controller support
  873. config ISA_DMA
  874. bool
  875. select ISA_DMA_API
  876. # Select ISA DMA interface
  877. config ISA_DMA_API
  878. bool
  879. config PCI
  880. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  881. help
  882. Find out whether you have a PCI motherboard. PCI is the name of a
  883. bus system, i.e. the way the CPU talks to the other stuff inside
  884. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  885. VESA. If you have PCI, say Y, otherwise N.
  886. config PCI_DOMAINS
  887. bool
  888. depends on PCI
  889. config PCI_SYSCALL
  890. def_bool PCI
  891. # Select the host bridge type
  892. config PCI_HOST_VIA82C505
  893. bool
  894. depends on PCI && ARCH_SHARK
  895. default y
  896. config PCI_HOST_ITE8152
  897. bool
  898. depends on PCI && MACH_ARMCORE
  899. default y
  900. select DMABOUNCE
  901. source "drivers/pci/Kconfig"
  902. source "drivers/pcmcia/Kconfig"
  903. endmenu
  904. menu "Kernel Features"
  905. source "kernel/time/Kconfig"
  906. config SMP
  907. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  908. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  909. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
  910. ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  911. depends on GENERIC_CLOCKEVENTS
  912. select USE_GENERIC_SMP_HELPERS
  913. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  914. help
  915. This enables support for systems with more than one CPU. If you have
  916. a system with only one CPU, like most personal computers, say N. If
  917. you have a system with more than one CPU, say Y.
  918. If you say N here, the kernel will run on single and multiprocessor
  919. machines, but will use only one CPU of a multiprocessor machine. If
  920. you say Y here, the kernel will run on many, but not all, single
  921. processor machines. On a single processor machine, the kernel will
  922. run faster if you say N here.
  923. See also <file:Documentation/i386/IO-APIC.txt>,
  924. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  925. <http://www.linuxdoc.org/docs.html#howto>.
  926. If you don't know what to do here, say N.
  927. config HAVE_ARM_SCU
  928. bool
  929. depends on SMP
  930. help
  931. This option enables support for the ARM system coherency unit
  932. config HAVE_ARM_TWD
  933. bool
  934. depends on SMP
  935. help
  936. This options enables support for the ARM timer and watchdog unit
  937. choice
  938. prompt "Memory split"
  939. default VMSPLIT_3G
  940. help
  941. Select the desired split between kernel and user memory.
  942. If you are not absolutely sure what you are doing, leave this
  943. option alone!
  944. config VMSPLIT_3G
  945. bool "3G/1G user/kernel split"
  946. config VMSPLIT_2G
  947. bool "2G/2G user/kernel split"
  948. config VMSPLIT_1G
  949. bool "1G/3G user/kernel split"
  950. endchoice
  951. config PAGE_OFFSET
  952. hex
  953. default 0x40000000 if VMSPLIT_1G
  954. default 0x80000000 if VMSPLIT_2G
  955. default 0xC0000000
  956. config NR_CPUS
  957. int "Maximum number of CPUs (2-32)"
  958. range 2 32
  959. depends on SMP
  960. default "4"
  961. config HOTPLUG_CPU
  962. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  963. depends on SMP && HOTPLUG && EXPERIMENTAL
  964. help
  965. Say Y here to experiment with turning CPUs off and on. CPUs
  966. can be controlled through /sys/devices/system/cpu.
  967. config LOCAL_TIMERS
  968. bool "Use local timer interrupts"
  969. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  970. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  971. default y
  972. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  973. help
  974. Enable support for local timers on SMP platforms, rather then the
  975. legacy IPI broadcast method. Local timers allows the system
  976. accounting to be spread across the timer interval, preventing a
  977. "thundering herd" at every timer tick.
  978. source kernel/Kconfig.preempt
  979. config HZ
  980. int
  981. default 128 if ARCH_L7200
  982. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
  983. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  984. default AT91_TIMER_HZ if ARCH_AT91
  985. default 100
  986. config THUMB2_KERNEL
  987. bool "Compile the kernel in Thumb-2 mode"
  988. depends on CPU_V7 && EXPERIMENTAL
  989. select AEABI
  990. select ARM_ASM_UNIFIED
  991. help
  992. By enabling this option, the kernel will be compiled in
  993. Thumb-2 mode. A compiler/assembler that understand the unified
  994. ARM-Thumb syntax is needed.
  995. If unsure, say N.
  996. config ARM_ASM_UNIFIED
  997. bool
  998. config AEABI
  999. bool "Use the ARM EABI to compile the kernel"
  1000. help
  1001. This option allows for the kernel to be compiled using the latest
  1002. ARM ABI (aka EABI). This is only useful if you are using a user
  1003. space environment that is also compiled with EABI.
  1004. Since there are major incompatibilities between the legacy ABI and
  1005. EABI, especially with regard to structure member alignment, this
  1006. option also changes the kernel syscall calling convention to
  1007. disambiguate both ABIs and allow for backward compatibility support
  1008. (selected with CONFIG_OABI_COMPAT).
  1009. To use this you need GCC version 4.0.0 or later.
  1010. config OABI_COMPAT
  1011. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1012. depends on AEABI && EXPERIMENTAL
  1013. default y
  1014. help
  1015. This option preserves the old syscall interface along with the
  1016. new (ARM EABI) one. It also provides a compatibility layer to
  1017. intercept syscalls that have structure arguments which layout
  1018. in memory differs between the legacy ABI and the new ARM EABI
  1019. (only for non "thumb" binaries). This option adds a tiny
  1020. overhead to all syscalls and produces a slightly larger kernel.
  1021. If you know you'll be using only pure EABI user space then you
  1022. can say N here. If this option is not selected and you attempt
  1023. to execute a legacy ABI binary then the result will be
  1024. UNPREDICTABLE (in fact it can be predicted that it won't work
  1025. at all). If in doubt say Y.
  1026. config ARCH_HAS_HOLES_MEMORYMODEL
  1027. bool
  1028. # Discontigmem is deprecated
  1029. config ARCH_DISCONTIGMEM_ENABLE
  1030. bool
  1031. config ARCH_SPARSEMEM_ENABLE
  1032. bool
  1033. config ARCH_SPARSEMEM_DEFAULT
  1034. def_bool ARCH_SPARSEMEM_ENABLE
  1035. config ARCH_SELECT_MEMORY_MODEL
  1036. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  1037. config NODES_SHIFT
  1038. int
  1039. default "4" if ARCH_LH7A40X
  1040. default "2"
  1041. depends on NEED_MULTIPLE_NODES
  1042. config HIGHMEM
  1043. bool "High Memory Support (EXPERIMENTAL)"
  1044. depends on MMU && EXPERIMENTAL
  1045. help
  1046. The address space of ARM processors is only 4 Gigabytes large
  1047. and it has to accommodate user address space, kernel address
  1048. space as well as some memory mapped IO. That means that, if you
  1049. have a large amount of physical memory and/or IO, not all of the
  1050. memory can be "permanently mapped" by the kernel. The physical
  1051. memory that is not permanently mapped is called "high memory".
  1052. Depending on the selected kernel/user memory split, minimum
  1053. vmalloc space and actual amount of RAM, you may not need this
  1054. option which should result in a slightly faster kernel.
  1055. If unsure, say n.
  1056. config HIGHPTE
  1057. bool "Allocate 2nd-level pagetables from highmem"
  1058. depends on HIGHMEM
  1059. depends on !OUTER_CACHE
  1060. config HW_PERF_EVENTS
  1061. bool "Enable hardware performance counter support for perf events"
  1062. depends on PERF_EVENTS && CPU_HAS_PMU
  1063. default y
  1064. help
  1065. Enable hardware performance counter support for perf events. If
  1066. disabled, perf events will use software events only.
  1067. source "mm/Kconfig"
  1068. config LEDS
  1069. bool "Timer and CPU usage LEDs"
  1070. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1071. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1072. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1073. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1074. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1075. ARCH_AT91 || ARCH_DAVINCI || \
  1076. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1077. help
  1078. If you say Y here, the LEDs on your machine will be used
  1079. to provide useful information about your current system status.
  1080. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1081. be able to select which LEDs are active using the options below. If
  1082. you are compiling a kernel for the EBSA-110 or the LART however, the
  1083. red LED will simply flash regularly to indicate that the system is
  1084. still functional. It is safe to say Y here if you have a CATS
  1085. system, but the driver will do nothing.
  1086. config LEDS_TIMER
  1087. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1088. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1089. || MACH_OMAP_PERSEUS2
  1090. depends on LEDS
  1091. depends on !GENERIC_CLOCKEVENTS
  1092. default y if ARCH_EBSA110
  1093. help
  1094. If you say Y here, one of the system LEDs (the green one on the
  1095. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1096. will flash regularly to indicate that the system is still
  1097. operational. This is mainly useful to kernel hackers who are
  1098. debugging unstable kernels.
  1099. The LART uses the same LED for both Timer LED and CPU usage LED
  1100. functions. You may choose to use both, but the Timer LED function
  1101. will overrule the CPU usage LED.
  1102. config LEDS_CPU
  1103. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1104. !ARCH_OMAP) \
  1105. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1106. || MACH_OMAP_PERSEUS2
  1107. depends on LEDS
  1108. help
  1109. If you say Y here, the red LED will be used to give a good real
  1110. time indication of CPU usage, by lighting whenever the idle task
  1111. is not currently executing.
  1112. The LART uses the same LED for both Timer LED and CPU usage LED
  1113. functions. You may choose to use both, but the Timer LED function
  1114. will overrule the CPU usage LED.
  1115. config ALIGNMENT_TRAP
  1116. bool
  1117. depends on CPU_CP15_MMU
  1118. default y if !ARCH_EBSA110
  1119. select HAVE_PROC_CPU if PROC_FS
  1120. help
  1121. ARM processors cannot fetch/store information which is not
  1122. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1123. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1124. fetch/store instructions will be emulated in software if you say
  1125. here, which has a severe performance impact. This is necessary for
  1126. correct operation of some network protocols. With an IP-only
  1127. configuration it is safe to say N, otherwise say Y.
  1128. config UACCESS_WITH_MEMCPY
  1129. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1130. depends on MMU && EXPERIMENTAL
  1131. default y if CPU_FEROCEON
  1132. help
  1133. Implement faster copy_to_user and clear_user methods for CPU
  1134. cores where a 8-word STM instruction give significantly higher
  1135. memory write throughput than a sequence of individual 32bit stores.
  1136. A possible side effect is a slight increase in scheduling latency
  1137. between threads sharing the same address space if they invoke
  1138. such copy operations with large buffers.
  1139. However, if the CPU data cache is using a write-allocate mode,
  1140. this option is unlikely to provide any performance gain.
  1141. endmenu
  1142. menu "Boot options"
  1143. # Compressed boot loader in ROM. Yes, we really want to ask about
  1144. # TEXT and BSS so we preserve their values in the config files.
  1145. config ZBOOT_ROM_TEXT
  1146. hex "Compressed ROM boot loader base address"
  1147. default "0"
  1148. help
  1149. The physical address at which the ROM-able zImage is to be
  1150. placed in the target. Platforms which normally make use of
  1151. ROM-able zImage formats normally set this to a suitable
  1152. value in their defconfig file.
  1153. If ZBOOT_ROM is not enabled, this has no effect.
  1154. config ZBOOT_ROM_BSS
  1155. hex "Compressed ROM boot loader BSS address"
  1156. default "0"
  1157. help
  1158. The base address of an area of read/write memory in the target
  1159. for the ROM-able zImage which must be available while the
  1160. decompressor is running. It must be large enough to hold the
  1161. entire decompressed kernel plus an additional 128 KiB.
  1162. Platforms which normally make use of ROM-able zImage formats
  1163. normally set this to a suitable value in their defconfig file.
  1164. If ZBOOT_ROM is not enabled, this has no effect.
  1165. config ZBOOT_ROM
  1166. bool "Compressed boot loader in ROM/flash"
  1167. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1168. help
  1169. Say Y here if you intend to execute your compressed kernel image
  1170. (zImage) directly from ROM or flash. If unsure, say N.
  1171. config CMDLINE
  1172. string "Default kernel command string"
  1173. default ""
  1174. help
  1175. On some architectures (EBSA110 and CATS), there is currently no way
  1176. for the boot loader to pass arguments to the kernel. For these
  1177. architectures, you should supply some command-line options at build
  1178. time by entering them here. As a minimum, you should specify the
  1179. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1180. config CMDLINE_FORCE
  1181. bool "Always use the default kernel command string"
  1182. depends on CMDLINE != ""
  1183. help
  1184. Always use the default kernel command string, even if the boot
  1185. loader passes other arguments to the kernel.
  1186. This is useful if you cannot or don't want to change the
  1187. command-line options your boot loader passes to the kernel.
  1188. If unsure, say N.
  1189. config XIP_KERNEL
  1190. bool "Kernel Execute-In-Place from ROM"
  1191. depends on !ZBOOT_ROM
  1192. help
  1193. Execute-In-Place allows the kernel to run from non-volatile storage
  1194. directly addressable by the CPU, such as NOR flash. This saves RAM
  1195. space since the text section of the kernel is not loaded from flash
  1196. to RAM. Read-write sections, such as the data section and stack,
  1197. are still copied to RAM. The XIP kernel is not compressed since
  1198. it has to run directly from flash, so it will take more space to
  1199. store it. The flash address used to link the kernel object files,
  1200. and for storing it, is configuration dependent. Therefore, if you
  1201. say Y here, you must know the proper physical address where to
  1202. store the kernel image depending on your own flash memory usage.
  1203. Also note that the make target becomes "make xipImage" rather than
  1204. "make zImage" or "make Image". The final kernel binary to put in
  1205. ROM memory will be arch/arm/boot/xipImage.
  1206. If unsure, say N.
  1207. config XIP_PHYS_ADDR
  1208. hex "XIP Kernel Physical Location"
  1209. depends on XIP_KERNEL
  1210. default "0x00080000"
  1211. help
  1212. This is the physical address in your flash memory the kernel will
  1213. be linked for and stored to. This address is dependent on your
  1214. own flash usage.
  1215. config KEXEC
  1216. bool "Kexec system call (EXPERIMENTAL)"
  1217. depends on EXPERIMENTAL
  1218. help
  1219. kexec is a system call that implements the ability to shutdown your
  1220. current kernel, and to start another kernel. It is like a reboot
  1221. but it is independent of the system firmware. And like a reboot
  1222. you can start any kernel with it, not just Linux.
  1223. It is an ongoing process to be certain the hardware in a machine
  1224. is properly shutdown, so do not be surprised if this code does not
  1225. initially work for you. It may help to enable device hotplugging
  1226. support.
  1227. config ATAGS_PROC
  1228. bool "Export atags in procfs"
  1229. depends on KEXEC
  1230. default y
  1231. help
  1232. Should the atags used to boot the kernel be exported in an "atags"
  1233. file in procfs. Useful with kexec.
  1234. endmenu
  1235. menu "CPU Power Management"
  1236. if ARCH_HAS_CPUFREQ
  1237. source "drivers/cpufreq/Kconfig"
  1238. config CPU_FREQ_SA1100
  1239. bool
  1240. config CPU_FREQ_SA1110
  1241. bool
  1242. config CPU_FREQ_INTEGRATOR
  1243. tristate "CPUfreq driver for ARM Integrator CPUs"
  1244. depends on ARCH_INTEGRATOR && CPU_FREQ
  1245. default y
  1246. help
  1247. This enables the CPUfreq driver for ARM Integrator CPUs.
  1248. For details, take a look at <file:Documentation/cpu-freq>.
  1249. If in doubt, say Y.
  1250. config CPU_FREQ_PXA
  1251. bool
  1252. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1253. default y
  1254. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1255. config CPU_FREQ_S3C64XX
  1256. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1257. depends on CPU_FREQ && CPU_S3C6410
  1258. config CPU_FREQ_S3C
  1259. bool
  1260. help
  1261. Internal configuration node for common cpufreq on Samsung SoC
  1262. config CPU_FREQ_S3C24XX
  1263. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1264. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1265. select CPU_FREQ_S3C
  1266. help
  1267. This enables the CPUfreq driver for the Samsung S3C24XX family
  1268. of CPUs.
  1269. For details, take a look at <file:Documentation/cpu-freq>.
  1270. If in doubt, say N.
  1271. config CPU_FREQ_S3C24XX_PLL
  1272. bool "Support CPUfreq changing of PLL frequency"
  1273. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1274. help
  1275. Compile in support for changing the PLL frequency from the
  1276. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1277. after a frequency change, so by default it is not enabled.
  1278. This also means that the PLL tables for the selected CPU(s) will
  1279. be built which may increase the size of the kernel image.
  1280. config CPU_FREQ_S3C24XX_DEBUG
  1281. bool "Debug CPUfreq Samsung driver core"
  1282. depends on CPU_FREQ_S3C24XX
  1283. help
  1284. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1285. config CPU_FREQ_S3C24XX_IODEBUG
  1286. bool "Debug CPUfreq Samsung driver IO timing"
  1287. depends on CPU_FREQ_S3C24XX
  1288. help
  1289. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1290. config CPU_FREQ_S3C24XX_DEBUGFS
  1291. bool "Export debugfs for CPUFreq"
  1292. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1293. help
  1294. Export status information via debugfs.
  1295. endif
  1296. source "drivers/cpuidle/Kconfig"
  1297. endmenu
  1298. menu "Floating point emulation"
  1299. comment "At least one emulation must be selected"
  1300. config FPE_NWFPE
  1301. bool "NWFPE math emulation"
  1302. depends on !AEABI || OABI_COMPAT
  1303. ---help---
  1304. Say Y to include the NWFPE floating point emulator in the kernel.
  1305. This is necessary to run most binaries. Linux does not currently
  1306. support floating point hardware so you need to say Y here even if
  1307. your machine has an FPA or floating point co-processor podule.
  1308. You may say N here if you are going to load the Acorn FPEmulator
  1309. early in the bootup.
  1310. config FPE_NWFPE_XP
  1311. bool "Support extended precision"
  1312. depends on FPE_NWFPE
  1313. help
  1314. Say Y to include 80-bit support in the kernel floating-point
  1315. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1316. Note that gcc does not generate 80-bit operations by default,
  1317. so in most cases this option only enlarges the size of the
  1318. floating point emulator without any good reason.
  1319. You almost surely want to say N here.
  1320. config FPE_FASTFPE
  1321. bool "FastFPE math emulation (EXPERIMENTAL)"
  1322. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1323. ---help---
  1324. Say Y here to include the FAST floating point emulator in the kernel.
  1325. This is an experimental much faster emulator which now also has full
  1326. precision for the mantissa. It does not support any exceptions.
  1327. It is very simple, and approximately 3-6 times faster than NWFPE.
  1328. It should be sufficient for most programs. It may be not suitable
  1329. for scientific calculations, but you have to check this for yourself.
  1330. If you do not feel you need a faster FP emulation you should better
  1331. choose NWFPE.
  1332. config VFP
  1333. bool "VFP-format floating point maths"
  1334. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1335. help
  1336. Say Y to include VFP support code in the kernel. This is needed
  1337. if your hardware includes a VFP unit.
  1338. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1339. release notes and additional status information.
  1340. Say N if your target does not have VFP hardware.
  1341. config VFPv3
  1342. bool
  1343. depends on VFP
  1344. default y if CPU_V7
  1345. config NEON
  1346. bool "Advanced SIMD (NEON) Extension support"
  1347. depends on VFPv3 && CPU_V7
  1348. help
  1349. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1350. Extension.
  1351. endmenu
  1352. menu "Userspace binary formats"
  1353. source "fs/Kconfig.binfmt"
  1354. config ARTHUR
  1355. tristate "RISC OS personality"
  1356. depends on !AEABI
  1357. help
  1358. Say Y here to include the kernel code necessary if you want to run
  1359. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1360. experimental; if this sounds frightening, say N and sleep in peace.
  1361. You can also say M here to compile this support as a module (which
  1362. will be called arthur).
  1363. endmenu
  1364. menu "Power management options"
  1365. source "kernel/power/Kconfig"
  1366. config ARCH_SUSPEND_POSSIBLE
  1367. def_bool y
  1368. endmenu
  1369. source "net/Kconfig"
  1370. source "drivers/Kconfig"
  1371. source "fs/Kconfig"
  1372. source "arch/arm/Kconfig.debug"
  1373. source "security/Kconfig"
  1374. source "crypto/Kconfig"
  1375. source "lib/Kconfig"