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 ARCH_USES_GETTIMEOFFSET
  39. bool
  40. default n
  41. config GENERIC_CLOCKEVENTS
  42. bool
  43. config GENERIC_CLOCKEVENTS_BROADCAST
  44. bool
  45. depends on GENERIC_CLOCKEVENTS
  46. default y if SMP && !LOCAL_TIMERS
  47. config HAVE_TCM
  48. bool
  49. select GENERIC_ALLOCATOR
  50. config HAVE_PROC_CPU
  51. bool
  52. config NO_IOPORT
  53. bool
  54. config EISA
  55. bool
  56. ---help---
  57. The Extended Industry Standard Architecture (EISA) bus was
  58. developed as an open alternative to the IBM MicroChannel bus.
  59. The EISA bus provided some of the features of the IBM MicroChannel
  60. bus while maintaining backward compatibility with cards made for
  61. the older ISA bus. The EISA bus saw limited use between 1988 and
  62. 1995 when it was made obsolete by the PCI bus.
  63. Say Y here if you are building a kernel for an EISA-based machine.
  64. Otherwise, say N.
  65. config SBUS
  66. bool
  67. config MCA
  68. bool
  69. help
  70. MicroChannel Architecture is found in some IBM PS/2 machines and
  71. laptops. It is a bus system similar to PCI or ISA. See
  72. <file:Documentation/mca.txt> (and especially the web page given
  73. there) before attempting to build an MCA bus kernel.
  74. config GENERIC_HARDIRQS
  75. bool
  76. default y
  77. config STACKTRACE_SUPPORT
  78. bool
  79. default y
  80. config HAVE_LATENCYTOP_SUPPORT
  81. bool
  82. depends on !SMP
  83. default y
  84. config LOCKDEP_SUPPORT
  85. bool
  86. default y
  87. config TRACE_IRQFLAGS_SUPPORT
  88. bool
  89. default y
  90. config HARDIRQS_SW_RESEND
  91. bool
  92. default y
  93. config GENERIC_IRQ_PROBE
  94. bool
  95. default y
  96. config GENERIC_LOCKBREAK
  97. bool
  98. default y
  99. depends on SMP && PREEMPT
  100. config RWSEM_GENERIC_SPINLOCK
  101. bool
  102. default y
  103. config RWSEM_XCHGADD_ALGORITHM
  104. bool
  105. config ARCH_HAS_ILOG2_U32
  106. bool
  107. config ARCH_HAS_ILOG2_U64
  108. bool
  109. config ARCH_HAS_CPUFREQ
  110. bool
  111. help
  112. Internal node to signify that the ARCH has CPUFREQ support
  113. and that the relevant menu configurations are displayed for
  114. it.
  115. config GENERIC_HWEIGHT
  116. bool
  117. default y
  118. config GENERIC_CALIBRATE_DELAY
  119. bool
  120. default y
  121. config ARCH_MAY_HAVE_PC_FDC
  122. bool
  123. config ZONE_DMA
  124. bool
  125. config NEED_DMA_MAP_STATE
  126. def_bool y
  127. config GENERIC_ISA_DMA
  128. bool
  129. config FIQ
  130. bool
  131. config ARCH_MTD_XIP
  132. bool
  133. config GENERIC_HARDIRQS_NO__DO_IRQ
  134. def_bool y
  135. config ARM_L1_CACHE_SHIFT_6
  136. bool
  137. help
  138. Setting ARM L1 cache line size to 64 Bytes.
  139. config VECTORS_BASE
  140. hex
  141. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  142. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  143. default 0x00000000
  144. help
  145. The base address of exception vectors.
  146. source "init/Kconfig"
  147. source "kernel/Kconfig.freezer"
  148. menu "System Type"
  149. config MMU
  150. bool "MMU-based Paged Memory Management Support"
  151. default y
  152. help
  153. Select if you want MMU-based virtualised addressing space
  154. support by paged memory management. If unsure, say 'Y'.
  155. #
  156. # The "ARM system type" choice list is ordered alphabetically by option
  157. # text. Please add new entries in the option alphabetic order.
  158. #
  159. choice
  160. prompt "ARM system type"
  161. default ARCH_VERSATILE
  162. config ARCH_AAEC2000
  163. bool "Agilent AAEC-2000 based"
  164. select CPU_ARM920T
  165. select ARM_AMBA
  166. select HAVE_CLK
  167. select ARCH_USES_GETTIMEOFFSET
  168. help
  169. This enables support for systems based on the Agilent AAEC-2000
  170. config ARCH_INTEGRATOR
  171. bool "ARM Ltd. Integrator family"
  172. select ARM_AMBA
  173. select ARCH_HAS_CPUFREQ
  174. select COMMON_CLKDEV
  175. select ICST
  176. select GENERIC_CLOCKEVENTS
  177. select PLAT_VERSATILE
  178. help
  179. Support for ARM's Integrator platform.
  180. config ARCH_REALVIEW
  181. bool "ARM Ltd. RealView family"
  182. select ARM_AMBA
  183. select COMMON_CLKDEV
  184. select ICST
  185. select GENERIC_CLOCKEVENTS
  186. select ARCH_WANT_OPTIONAL_GPIOLIB
  187. select PLAT_VERSATILE
  188. select ARM_TIMER_SP804
  189. select GPIO_PL061 if GPIOLIB
  190. help
  191. This enables support for ARM Ltd RealView boards.
  192. config ARCH_VERSATILE
  193. bool "ARM Ltd. Versatile family"
  194. select ARM_AMBA
  195. select ARM_VIC
  196. select COMMON_CLKDEV
  197. select ICST
  198. select GENERIC_CLOCKEVENTS
  199. select ARCH_WANT_OPTIONAL_GPIOLIB
  200. select PLAT_VERSATILE
  201. select ARM_TIMER_SP804
  202. help
  203. This enables support for ARM Ltd Versatile board.
  204. config ARCH_VEXPRESS
  205. bool "ARM Ltd. Versatile Express family"
  206. select ARCH_WANT_OPTIONAL_GPIOLIB
  207. select ARM_AMBA
  208. select ARM_TIMER_SP804
  209. select COMMON_CLKDEV
  210. select GENERIC_CLOCKEVENTS
  211. select HAVE_CLK
  212. select ICST
  213. select PLAT_VERSATILE
  214. help
  215. This enables support for the ARM Ltd Versatile Express boards.
  216. config ARCH_AT91
  217. bool "Atmel AT91"
  218. select ARCH_REQUIRE_GPIOLIB
  219. select HAVE_CLK
  220. select ARCH_USES_GETTIMEOFFSET
  221. help
  222. This enables support for systems based on the Atmel AT91RM9200,
  223. AT91SAM9 and AT91CAP9 processors.
  224. config ARCH_BCMRING
  225. bool "Broadcom BCMRING"
  226. depends on MMU
  227. select CPU_V6
  228. select ARM_AMBA
  229. select COMMON_CLKDEV
  230. select GENERIC_CLOCKEVENTS
  231. select ARCH_WANT_OPTIONAL_GPIOLIB
  232. help
  233. Support for Broadcom's BCMRing platform.
  234. config ARCH_CLPS711X
  235. bool "Cirrus Logic CLPS711x/EP721x-based"
  236. select CPU_ARM720T
  237. select ARCH_USES_GETTIMEOFFSET
  238. help
  239. Support for Cirrus Logic 711x/721x based boards.
  240. config ARCH_CNS3XXX
  241. bool "Cavium Networks CNS3XXX family"
  242. select CPU_V6
  243. select GENERIC_CLOCKEVENTS
  244. select ARM_GIC
  245. help
  246. Support for Cavium Networks CNS3XXX platform.
  247. config ARCH_GEMINI
  248. bool "Cortina Systems Gemini"
  249. select CPU_FA526
  250. select ARCH_REQUIRE_GPIOLIB
  251. select ARCH_USES_GETTIMEOFFSET
  252. help
  253. Support for the Cortina Systems Gemini family SoCs
  254. config ARCH_EBSA110
  255. bool "EBSA-110"
  256. select CPU_SA110
  257. select ISA
  258. select NO_IOPORT
  259. select ARCH_USES_GETTIMEOFFSET
  260. help
  261. This is an evaluation board for the StrongARM processor available
  262. from Digital. It has limited hardware on-board, including an
  263. Ethernet interface, two PCMCIA sockets, two serial ports and a
  264. parallel port.
  265. config ARCH_EP93XX
  266. bool "EP93xx-based"
  267. select CPU_ARM920T
  268. select ARM_AMBA
  269. select ARM_VIC
  270. select COMMON_CLKDEV
  271. select ARCH_REQUIRE_GPIOLIB
  272. select ARCH_HAS_HOLES_MEMORYMODEL
  273. select ARCH_USES_GETTIMEOFFSET
  274. help
  275. This enables support for the Cirrus EP93xx series of CPUs.
  276. config ARCH_FOOTBRIDGE
  277. bool "FootBridge"
  278. select CPU_SA110
  279. select FOOTBRIDGE
  280. select ARCH_USES_GETTIMEOFFSET
  281. help
  282. Support for systems based on the DC21285 companion chip
  283. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  284. config ARCH_MXC
  285. bool "Freescale MXC/iMX-based"
  286. select GENERIC_CLOCKEVENTS
  287. select ARCH_REQUIRE_GPIOLIB
  288. select COMMON_CLKDEV
  289. help
  290. Support for Freescale MXC/iMX-based family of processors
  291. config ARCH_STMP3XXX
  292. bool "Freescale STMP3xxx"
  293. select CPU_ARM926T
  294. select COMMON_CLKDEV
  295. select ARCH_REQUIRE_GPIOLIB
  296. select GENERIC_CLOCKEVENTS
  297. select USB_ARCH_HAS_EHCI
  298. help
  299. Support for systems based on the Freescale 3xxx CPUs.
  300. config ARCH_NETX
  301. bool "Hilscher NetX based"
  302. select CPU_ARM926T
  303. select ARM_VIC
  304. select GENERIC_CLOCKEVENTS
  305. help
  306. This enables support for systems based on the Hilscher NetX Soc
  307. config ARCH_H720X
  308. bool "Hynix HMS720x-based"
  309. select CPU_ARM720T
  310. select ISA_DMA_API
  311. select ARCH_USES_GETTIMEOFFSET
  312. help
  313. This enables support for systems based on the Hynix HMS720x
  314. config ARCH_IOP13XX
  315. bool "IOP13xx-based"
  316. depends on MMU
  317. select CPU_XSC3
  318. select PLAT_IOP
  319. select PCI
  320. select ARCH_SUPPORTS_MSI
  321. select VMSPLIT_1G
  322. help
  323. Support for Intel's IOP13XX (XScale) family of processors.
  324. config ARCH_IOP32X
  325. bool "IOP32x-based"
  326. depends on MMU
  327. select CPU_XSCALE
  328. select PLAT_IOP
  329. select PCI
  330. select ARCH_REQUIRE_GPIOLIB
  331. help
  332. Support for Intel's 80219 and IOP32X (XScale) family of
  333. processors.
  334. config ARCH_IOP33X
  335. bool "IOP33x-based"
  336. depends on MMU
  337. select CPU_XSCALE
  338. select PLAT_IOP
  339. select PCI
  340. select ARCH_REQUIRE_GPIOLIB
  341. help
  342. Support for Intel's IOP33X (XScale) family of processors.
  343. config ARCH_IXP23XX
  344. bool "IXP23XX-based"
  345. depends on MMU
  346. select CPU_XSC3
  347. select PCI
  348. select ARCH_USES_GETTIMEOFFSET
  349. help
  350. Support for Intel's IXP23xx (XScale) family of processors.
  351. config ARCH_IXP2000
  352. bool "IXP2400/2800-based"
  353. depends on MMU
  354. select CPU_XSCALE
  355. select PCI
  356. select ARCH_USES_GETTIMEOFFSET
  357. help
  358. Support for Intel's IXP2400/2800 (XScale) family of processors.
  359. config ARCH_IXP4XX
  360. bool "IXP4xx-based"
  361. depends on MMU
  362. select CPU_XSCALE
  363. select GENERIC_GPIO
  364. select GENERIC_CLOCKEVENTS
  365. select DMABOUNCE if PCI
  366. help
  367. Support for Intel's IXP4XX (XScale) family of processors.
  368. config ARCH_L7200
  369. bool "LinkUp-L7200"
  370. select CPU_ARM720T
  371. select FIQ
  372. select ARCH_USES_GETTIMEOFFSET
  373. help
  374. Say Y here if you intend to run this kernel on a LinkUp Systems
  375. L7200 Software Development Board which uses an ARM720T processor.
  376. Information on this board can be obtained at:
  377. <http://www.linkupsys.com/>
  378. If you have any questions or comments about the Linux kernel port
  379. to this board, send e-mail to <sjhill@cotw.com>.
  380. config ARCH_DOVE
  381. bool "Marvell Dove"
  382. select PCI
  383. select ARCH_REQUIRE_GPIOLIB
  384. select GENERIC_CLOCKEVENTS
  385. select PLAT_ORION
  386. help
  387. Support for the Marvell Dove SoC 88AP510
  388. config ARCH_KIRKWOOD
  389. bool "Marvell Kirkwood"
  390. select CPU_FEROCEON
  391. select PCI
  392. select ARCH_REQUIRE_GPIOLIB
  393. select GENERIC_CLOCKEVENTS
  394. select PLAT_ORION
  395. help
  396. Support for the following Marvell Kirkwood series SoCs:
  397. 88F6180, 88F6192 and 88F6281.
  398. config ARCH_LOKI
  399. bool "Marvell Loki (88RC8480)"
  400. select CPU_FEROCEON
  401. select GENERIC_CLOCKEVENTS
  402. select PLAT_ORION
  403. help
  404. Support for the Marvell Loki (88RC8480) SoC.
  405. config ARCH_MV78XX0
  406. bool "Marvell MV78xx0"
  407. select CPU_FEROCEON
  408. select PCI
  409. select ARCH_REQUIRE_GPIOLIB
  410. select GENERIC_CLOCKEVENTS
  411. select PLAT_ORION
  412. help
  413. Support for the following Marvell MV78xx0 series SoCs:
  414. MV781x0, MV782x0.
  415. config ARCH_ORION5X
  416. bool "Marvell Orion"
  417. depends on MMU
  418. select CPU_FEROCEON
  419. select PCI
  420. select ARCH_REQUIRE_GPIOLIB
  421. select GENERIC_CLOCKEVENTS
  422. select PLAT_ORION
  423. help
  424. Support for the following Marvell Orion 5x series SoCs:
  425. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  426. Orion-2 (5281), Orion-1-90 (6183).
  427. config ARCH_MMP
  428. bool "Marvell PXA168/910/MMP2"
  429. depends on MMU
  430. select ARCH_REQUIRE_GPIOLIB
  431. select COMMON_CLKDEV
  432. select GENERIC_CLOCKEVENTS
  433. select TICK_ONESHOT
  434. select PLAT_PXA
  435. help
  436. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  437. config ARCH_KS8695
  438. bool "Micrel/Kendin KS8695"
  439. select CPU_ARM922T
  440. select ARCH_REQUIRE_GPIOLIB
  441. select ARCH_USES_GETTIMEOFFSET
  442. help
  443. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  444. System-on-Chip devices.
  445. config ARCH_NS9XXX
  446. bool "NetSilicon NS9xxx"
  447. select CPU_ARM926T
  448. select GENERIC_GPIO
  449. select GENERIC_CLOCKEVENTS
  450. select HAVE_CLK
  451. help
  452. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  453. System.
  454. <http://www.digi.com/products/microprocessors/index.jsp>
  455. config ARCH_W90X900
  456. bool "Nuvoton W90X900 CPU"
  457. select CPU_ARM926T
  458. select ARCH_REQUIRE_GPIOLIB
  459. select COMMON_CLKDEV
  460. select GENERIC_CLOCKEVENTS
  461. help
  462. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  463. At present, the w90x900 has been renamed nuc900, regarding
  464. the ARM series product line, you can login the following
  465. link address to know more.
  466. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  467. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  468. config ARCH_NUC93X
  469. bool "Nuvoton NUC93X CPU"
  470. select CPU_ARM926T
  471. select COMMON_CLKDEV
  472. help
  473. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  474. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  475. config ARCH_PNX4008
  476. bool "Philips Nexperia PNX4008 Mobile"
  477. select CPU_ARM926T
  478. select COMMON_CLKDEV
  479. select ARCH_USES_GETTIMEOFFSET
  480. help
  481. This enables support for Philips PNX4008 mobile platform.
  482. config ARCH_PXA
  483. bool "PXA2xx/PXA3xx-based"
  484. depends on MMU
  485. select ARCH_MTD_XIP
  486. select ARCH_HAS_CPUFREQ
  487. select COMMON_CLKDEV
  488. select ARCH_REQUIRE_GPIOLIB
  489. select GENERIC_CLOCKEVENTS
  490. select TICK_ONESHOT
  491. select PLAT_PXA
  492. help
  493. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  494. config ARCH_MSM
  495. bool "Qualcomm MSM"
  496. select HAVE_CLK
  497. select GENERIC_CLOCKEVENTS
  498. help
  499. Support for Qualcomm MSM/QSD based systems. This runs on the
  500. apps processor of the MSM/QSD and depends on a shared memory
  501. interface to the modem processor which runs the baseband
  502. stack and controls some vital subsystems
  503. (clock and power control, etc).
  504. config ARCH_SHMOBILE
  505. bool "Renesas SH-Mobile"
  506. help
  507. Support for Renesas's SH-Mobile ARM platforms
  508. config ARCH_RPC
  509. bool "RiscPC"
  510. select ARCH_ACORN
  511. select FIQ
  512. select TIMER_ACORN
  513. select ARCH_MAY_HAVE_PC_FDC
  514. select HAVE_PATA_PLATFORM
  515. select ISA_DMA_API
  516. select NO_IOPORT
  517. select ARCH_SPARSEMEM_ENABLE
  518. select ARCH_USES_GETTIMEOFFSET
  519. help
  520. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  521. CD-ROM interface, serial and parallel port, and the floppy drive.
  522. config ARCH_SA1100
  523. bool "SA1100-based"
  524. select CPU_SA1100
  525. select ISA
  526. select ARCH_SPARSEMEM_ENABLE
  527. select ARCH_MTD_XIP
  528. select ARCH_HAS_CPUFREQ
  529. select CPU_FREQ
  530. select GENERIC_CLOCKEVENTS
  531. select HAVE_CLK
  532. select TICK_ONESHOT
  533. select ARCH_REQUIRE_GPIOLIB
  534. help
  535. Support for StrongARM 11x0 based boards.
  536. config ARCH_S3C2410
  537. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  538. select GENERIC_GPIO
  539. select ARCH_HAS_CPUFREQ
  540. select HAVE_CLK
  541. select ARCH_USES_GETTIMEOFFSET
  542. help
  543. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  544. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  545. the Samsung SMDK2410 development board (and derivatives).
  546. Note, the S3C2416 and the S3C2450 are so close that they even share
  547. the same SoC ID code. This means that there is no seperate machine
  548. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  549. config ARCH_S3C64XX
  550. bool "Samsung S3C64XX"
  551. select PLAT_SAMSUNG
  552. select CPU_V6
  553. select ARM_VIC
  554. select HAVE_CLK
  555. select NO_IOPORT
  556. select ARCH_USES_GETTIMEOFFSET
  557. select ARCH_HAS_CPUFREQ
  558. select ARCH_REQUIRE_GPIOLIB
  559. select SAMSUNG_CLKSRC
  560. select SAMSUNG_IRQ_VIC_TIMER
  561. select SAMSUNG_IRQ_UART
  562. select S3C_GPIO_TRACK
  563. select S3C_GPIO_PULL_UPDOWN
  564. select S3C_GPIO_CFG_S3C24XX
  565. select S3C_GPIO_CFG_S3C64XX
  566. select S3C_DEV_NAND
  567. select USB_ARCH_HAS_OHCI
  568. select SAMSUNG_GPIOLIB_4BIT
  569. help
  570. Samsung S3C64XX series based systems
  571. config ARCH_S5P6440
  572. bool "Samsung S5P6440"
  573. select CPU_V6
  574. select GENERIC_GPIO
  575. select HAVE_CLK
  576. select ARCH_USES_GETTIMEOFFSET
  577. help
  578. Samsung S5P6440 CPU based systems
  579. config ARCH_S5P6442
  580. bool "Samsung S5P6442"
  581. select CPU_V6
  582. select GENERIC_GPIO
  583. select HAVE_CLK
  584. select ARCH_USES_GETTIMEOFFSET
  585. help
  586. Samsung S5P6442 CPU based systems
  587. config ARCH_S5PC100
  588. bool "Samsung S5PC100"
  589. select GENERIC_GPIO
  590. select HAVE_CLK
  591. select CPU_V7
  592. select ARM_L1_CACHE_SHIFT_6
  593. select ARCH_USES_GETTIMEOFFSET
  594. help
  595. Samsung S5PC100 series based systems
  596. config ARCH_S5PV210
  597. bool "Samsung S5PV210/S5PC110"
  598. select CPU_V7
  599. select GENERIC_GPIO
  600. select HAVE_CLK
  601. select ARM_L1_CACHE_SHIFT_6
  602. select ARCH_USES_GETTIMEOFFSET
  603. help
  604. Samsung S5PV210/S5PC110 series based systems
  605. config ARCH_SHARK
  606. bool "Shark"
  607. select CPU_SA110
  608. select ISA
  609. select ISA_DMA
  610. select ZONE_DMA
  611. select PCI
  612. select ARCH_USES_GETTIMEOFFSET
  613. help
  614. Support for the StrongARM based Digital DNARD machine, also known
  615. as "Shark" (<http://www.shark-linux.de/shark.html>).
  616. config ARCH_LH7A40X
  617. bool "Sharp LH7A40X"
  618. select CPU_ARM922T
  619. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  620. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  621. select ARCH_USES_GETTIMEOFFSET
  622. help
  623. Say Y here for systems based on one of the Sharp LH7A40X
  624. System on a Chip processors. These CPUs include an ARM922T
  625. core with a wide array of integrated devices for
  626. hand-held and low-power applications.
  627. config ARCH_U300
  628. bool "ST-Ericsson U300 Series"
  629. depends on MMU
  630. select CPU_ARM926T
  631. select HAVE_TCM
  632. select ARM_AMBA
  633. select ARM_VIC
  634. select GENERIC_CLOCKEVENTS
  635. select COMMON_CLKDEV
  636. select GENERIC_GPIO
  637. help
  638. Support for ST-Ericsson U300 series mobile platforms.
  639. config ARCH_U8500
  640. bool "ST-Ericsson U8500 Series"
  641. select CPU_V7
  642. select ARM_AMBA
  643. select GENERIC_CLOCKEVENTS
  644. select COMMON_CLKDEV
  645. select ARCH_REQUIRE_GPIOLIB
  646. help
  647. Support for ST-Ericsson's Ux500 architecture
  648. config ARCH_NOMADIK
  649. bool "STMicroelectronics Nomadik"
  650. select ARM_AMBA
  651. select ARM_VIC
  652. select CPU_ARM926T
  653. select COMMON_CLKDEV
  654. select GENERIC_CLOCKEVENTS
  655. select ARCH_REQUIRE_GPIOLIB
  656. help
  657. Support for the Nomadik platform by ST-Ericsson
  658. config ARCH_DAVINCI
  659. bool "TI DaVinci"
  660. select GENERIC_CLOCKEVENTS
  661. select ARCH_REQUIRE_GPIOLIB
  662. select ZONE_DMA
  663. select HAVE_IDE
  664. select COMMON_CLKDEV
  665. select GENERIC_ALLOCATOR
  666. select ARCH_HAS_HOLES_MEMORYMODEL
  667. help
  668. Support for TI's DaVinci platform.
  669. config ARCH_OMAP
  670. bool "TI OMAP"
  671. select HAVE_CLK
  672. select ARCH_REQUIRE_GPIOLIB
  673. select ARCH_HAS_CPUFREQ
  674. select GENERIC_CLOCKEVENTS
  675. select ARCH_HAS_HOLES_MEMORYMODEL
  676. help
  677. Support for TI's OMAP platform (OMAP1 and OMAP2).
  678. config PLAT_SPEAR
  679. bool "ST SPEAr"
  680. select ARM_AMBA
  681. select ARCH_REQUIRE_GPIOLIB
  682. select COMMON_CLKDEV
  683. select GENERIC_CLOCKEVENTS
  684. select HAVE_CLK
  685. help
  686. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  687. endchoice
  688. #
  689. # This is sorted alphabetically by mach-* pathname. However, plat-*
  690. # Kconfigs may be included either alphabetically (according to the
  691. # plat- suffix) or along side the corresponding mach-* source.
  692. #
  693. source "arch/arm/mach-aaec2000/Kconfig"
  694. source "arch/arm/mach-at91/Kconfig"
  695. source "arch/arm/mach-bcmring/Kconfig"
  696. source "arch/arm/mach-clps711x/Kconfig"
  697. source "arch/arm/mach-cns3xxx/Kconfig"
  698. source "arch/arm/mach-davinci/Kconfig"
  699. source "arch/arm/mach-dove/Kconfig"
  700. source "arch/arm/mach-ep93xx/Kconfig"
  701. source "arch/arm/mach-footbridge/Kconfig"
  702. source "arch/arm/mach-gemini/Kconfig"
  703. source "arch/arm/mach-h720x/Kconfig"
  704. source "arch/arm/mach-integrator/Kconfig"
  705. source "arch/arm/mach-iop32x/Kconfig"
  706. source "arch/arm/mach-iop33x/Kconfig"
  707. source "arch/arm/mach-iop13xx/Kconfig"
  708. source "arch/arm/mach-ixp4xx/Kconfig"
  709. source "arch/arm/mach-ixp2000/Kconfig"
  710. source "arch/arm/mach-ixp23xx/Kconfig"
  711. source "arch/arm/mach-kirkwood/Kconfig"
  712. source "arch/arm/mach-ks8695/Kconfig"
  713. source "arch/arm/mach-lh7a40x/Kconfig"
  714. source "arch/arm/mach-loki/Kconfig"
  715. source "arch/arm/mach-msm/Kconfig"
  716. source "arch/arm/mach-mv78xx0/Kconfig"
  717. source "arch/arm/plat-mxc/Kconfig"
  718. source "arch/arm/mach-netx/Kconfig"
  719. source "arch/arm/mach-nomadik/Kconfig"
  720. source "arch/arm/plat-nomadik/Kconfig"
  721. source "arch/arm/mach-ns9xxx/Kconfig"
  722. source "arch/arm/mach-nuc93x/Kconfig"
  723. source "arch/arm/plat-omap/Kconfig"
  724. source "arch/arm/mach-omap1/Kconfig"
  725. source "arch/arm/mach-omap2/Kconfig"
  726. source "arch/arm/mach-orion5x/Kconfig"
  727. source "arch/arm/mach-pxa/Kconfig"
  728. source "arch/arm/plat-pxa/Kconfig"
  729. source "arch/arm/mach-mmp/Kconfig"
  730. source "arch/arm/mach-realview/Kconfig"
  731. source "arch/arm/mach-sa1100/Kconfig"
  732. source "arch/arm/plat-samsung/Kconfig"
  733. source "arch/arm/plat-s3c24xx/Kconfig"
  734. source "arch/arm/plat-s5p/Kconfig"
  735. source "arch/arm/plat-spear/Kconfig"
  736. if ARCH_S3C2410
  737. source "arch/arm/mach-s3c2400/Kconfig"
  738. source "arch/arm/mach-s3c2410/Kconfig"
  739. source "arch/arm/mach-s3c2412/Kconfig"
  740. source "arch/arm/mach-s3c2416/Kconfig"
  741. source "arch/arm/mach-s3c2440/Kconfig"
  742. source "arch/arm/mach-s3c2443/Kconfig"
  743. endif
  744. if ARCH_S3C64XX
  745. source "arch/arm/mach-s3c64xx/Kconfig"
  746. endif
  747. source "arch/arm/mach-s5p6440/Kconfig"
  748. source "arch/arm/mach-s5p6442/Kconfig"
  749. source "arch/arm/mach-s5pc100/Kconfig"
  750. source "arch/arm/mach-s5pv210/Kconfig"
  751. source "arch/arm/mach-shmobile/Kconfig"
  752. source "arch/arm/plat-stmp3xxx/Kconfig"
  753. source "arch/arm/mach-u300/Kconfig"
  754. source "arch/arm/mach-ux500/Kconfig"
  755. source "arch/arm/mach-versatile/Kconfig"
  756. source "arch/arm/mach-vexpress/Kconfig"
  757. source "arch/arm/mach-w90x900/Kconfig"
  758. # Definitions to make life easier
  759. config ARCH_ACORN
  760. bool
  761. config PLAT_IOP
  762. bool
  763. select GENERIC_CLOCKEVENTS
  764. config PLAT_ORION
  765. bool
  766. config PLAT_PXA
  767. bool
  768. config PLAT_VERSATILE
  769. bool
  770. config ARM_TIMER_SP804
  771. bool
  772. source arch/arm/mm/Kconfig
  773. config IWMMXT
  774. bool "Enable iWMMXt support"
  775. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  776. default y if PXA27x || PXA3xx || ARCH_MMP
  777. help
  778. Enable support for iWMMXt context switching at run time if
  779. running on a CPU that supports it.
  780. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  781. config XSCALE_PMU
  782. bool
  783. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  784. default y
  785. config CPU_HAS_PMU
  786. depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
  787. (!ARCH_OMAP3 || OMAP3_EMU)
  788. default y
  789. bool
  790. if !MMU
  791. source "arch/arm/Kconfig-nommu"
  792. endif
  793. config ARM_ERRATA_411920
  794. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  795. depends on CPU_V6 && !SMP
  796. help
  797. Invalidation of the Instruction Cache operation can
  798. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  799. It does not affect the MPCore. This option enables the ARM Ltd.
  800. recommended workaround.
  801. config ARM_ERRATA_430973
  802. bool "ARM errata: Stale prediction on replaced interworking branch"
  803. depends on CPU_V7
  804. help
  805. This option enables the workaround for the 430973 Cortex-A8
  806. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  807. interworking branch is replaced with another code sequence at the
  808. same virtual address, whether due to self-modifying code or virtual
  809. to physical address re-mapping, Cortex-A8 does not recover from the
  810. stale interworking branch prediction. This results in Cortex-A8
  811. executing the new code sequence in the incorrect ARM or Thumb state.
  812. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  813. and also flushes the branch target cache at every context switch.
  814. Note that setting specific bits in the ACTLR register may not be
  815. available in non-secure mode.
  816. config ARM_ERRATA_458693
  817. bool "ARM errata: Processor deadlock when a false hazard is created"
  818. depends on CPU_V7
  819. help
  820. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  821. erratum. For very specific sequences of memory operations, it is
  822. possible for a hazard condition intended for a cache line to instead
  823. be incorrectly associated with a different cache line. This false
  824. hazard might then cause a processor deadlock. The workaround enables
  825. the L1 caching of the NEON accesses and disables the PLD instruction
  826. in the ACTLR register. Note that setting specific bits in the ACTLR
  827. register may not be available in non-secure mode.
  828. config ARM_ERRATA_460075
  829. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  830. depends on CPU_V7
  831. help
  832. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  833. erratum. Any asynchronous access to the L2 cache may encounter a
  834. situation in which recent store transactions to the L2 cache are lost
  835. and overwritten with stale memory contents from external memory. The
  836. workaround disables the write-allocate mode for the L2 cache via the
  837. ACTLR register. Note that setting specific bits in the ACTLR register
  838. may not be available in non-secure mode.
  839. config PL310_ERRATA_588369
  840. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  841. depends on CACHE_L2X0 && ARCH_OMAP4
  842. help
  843. The PL310 L2 cache controller implements three types of Clean &
  844. Invalidate maintenance operations: by Physical Address
  845. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  846. They are architecturally defined to behave as the execution of a
  847. clean operation followed immediately by an invalidate operation,
  848. both performing to the same memory location. This functionality
  849. is not correctly implemented in PL310 as clean lines are not
  850. invalidated as a result of these operations. Note that this errata
  851. uses Texas Instrument's secure monitor api.
  852. endmenu
  853. source "arch/arm/common/Kconfig"
  854. config FORCE_MAX_ZONEORDER
  855. int
  856. depends on SA1111
  857. default "9"
  858. menu "Bus support"
  859. config ARM_AMBA
  860. bool
  861. config ISA
  862. bool
  863. help
  864. Find out whether you have ISA slots on your motherboard. ISA is the
  865. name of a bus system, i.e. the way the CPU talks to the other stuff
  866. inside your box. Other bus systems are PCI, EISA, MicroChannel
  867. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  868. newer boards don't support it. If you have ISA, say Y, otherwise N.
  869. # Select ISA DMA controller support
  870. config ISA_DMA
  871. bool
  872. select ISA_DMA_API
  873. # Select ISA DMA interface
  874. config ISA_DMA_API
  875. bool
  876. config PCI
  877. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  878. help
  879. Find out whether you have a PCI motherboard. PCI is the name of a
  880. bus system, i.e. the way the CPU talks to the other stuff inside
  881. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  882. VESA. If you have PCI, say Y, otherwise N.
  883. config PCI_DOMAINS
  884. bool
  885. depends on PCI
  886. config PCI_SYSCALL
  887. def_bool PCI
  888. # Select the host bridge type
  889. config PCI_HOST_VIA82C505
  890. bool
  891. depends on PCI && ARCH_SHARK
  892. default y
  893. config PCI_HOST_ITE8152
  894. bool
  895. depends on PCI && MACH_ARMCORE
  896. default y
  897. select DMABOUNCE
  898. source "drivers/pci/Kconfig"
  899. source "drivers/pcmcia/Kconfig"
  900. endmenu
  901. menu "Kernel Features"
  902. source "kernel/time/Kconfig"
  903. config SMP
  904. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  905. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  906. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
  907. ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  908. depends on GENERIC_CLOCKEVENTS
  909. select USE_GENERIC_SMP_HELPERS
  910. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  911. help
  912. This enables support for systems with more than one CPU. If you have
  913. a system with only one CPU, like most personal computers, say N. If
  914. you have a system with more than one CPU, say Y.
  915. If you say N here, the kernel will run on single and multiprocessor
  916. machines, but will use only one CPU of a multiprocessor machine. If
  917. you say Y here, the kernel will run on many, but not all, single
  918. processor machines. On a single processor machine, the kernel will
  919. run faster if you say N here.
  920. See also <file:Documentation/i386/IO-APIC.txt>,
  921. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  922. <http://www.linuxdoc.org/docs.html#howto>.
  923. If you don't know what to do here, say N.
  924. config HAVE_ARM_SCU
  925. bool
  926. depends on SMP
  927. help
  928. This option enables support for the ARM system coherency unit
  929. config HAVE_ARM_TWD
  930. bool
  931. depends on SMP
  932. help
  933. This options enables support for the ARM timer and watchdog unit
  934. choice
  935. prompt "Memory split"
  936. default VMSPLIT_3G
  937. help
  938. Select the desired split between kernel and user memory.
  939. If you are not absolutely sure what you are doing, leave this
  940. option alone!
  941. config VMSPLIT_3G
  942. bool "3G/1G user/kernel split"
  943. config VMSPLIT_2G
  944. bool "2G/2G user/kernel split"
  945. config VMSPLIT_1G
  946. bool "1G/3G user/kernel split"
  947. endchoice
  948. config PAGE_OFFSET
  949. hex
  950. default 0x40000000 if VMSPLIT_1G
  951. default 0x80000000 if VMSPLIT_2G
  952. default 0xC0000000
  953. config NR_CPUS
  954. int "Maximum number of CPUs (2-32)"
  955. range 2 32
  956. depends on SMP
  957. default "4"
  958. config HOTPLUG_CPU
  959. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  960. depends on SMP && HOTPLUG && EXPERIMENTAL
  961. help
  962. Say Y here to experiment with turning CPUs off and on. CPUs
  963. can be controlled through /sys/devices/system/cpu.
  964. config LOCAL_TIMERS
  965. bool "Use local timer interrupts"
  966. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  967. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  968. default y
  969. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  970. help
  971. Enable support for local timers on SMP platforms, rather then the
  972. legacy IPI broadcast method. Local timers allows the system
  973. accounting to be spread across the timer interval, preventing a
  974. "thundering herd" at every timer tick.
  975. source kernel/Kconfig.preempt
  976. config HZ
  977. int
  978. default 128 if ARCH_L7200
  979. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
  980. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  981. default AT91_TIMER_HZ if ARCH_AT91
  982. default 100
  983. config THUMB2_KERNEL
  984. bool "Compile the kernel in Thumb-2 mode"
  985. depends on CPU_V7 && EXPERIMENTAL
  986. select AEABI
  987. select ARM_ASM_UNIFIED
  988. help
  989. By enabling this option, the kernel will be compiled in
  990. Thumb-2 mode. A compiler/assembler that understand the unified
  991. ARM-Thumb syntax is needed.
  992. If unsure, say N.
  993. config ARM_ASM_UNIFIED
  994. bool
  995. config AEABI
  996. bool "Use the ARM EABI to compile the kernel"
  997. help
  998. This option allows for the kernel to be compiled using the latest
  999. ARM ABI (aka EABI). This is only useful if you are using a user
  1000. space environment that is also compiled with EABI.
  1001. Since there are major incompatibilities between the legacy ABI and
  1002. EABI, especially with regard to structure member alignment, this
  1003. option also changes the kernel syscall calling convention to
  1004. disambiguate both ABIs and allow for backward compatibility support
  1005. (selected with CONFIG_OABI_COMPAT).
  1006. To use this you need GCC version 4.0.0 or later.
  1007. config OABI_COMPAT
  1008. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1009. depends on AEABI && EXPERIMENTAL
  1010. default y
  1011. help
  1012. This option preserves the old syscall interface along with the
  1013. new (ARM EABI) one. It also provides a compatibility layer to
  1014. intercept syscalls that have structure arguments which layout
  1015. in memory differs between the legacy ABI and the new ARM EABI
  1016. (only for non "thumb" binaries). This option adds a tiny
  1017. overhead to all syscalls and produces a slightly larger kernel.
  1018. If you know you'll be using only pure EABI user space then you
  1019. can say N here. If this option is not selected and you attempt
  1020. to execute a legacy ABI binary then the result will be
  1021. UNPREDICTABLE (in fact it can be predicted that it won't work
  1022. at all). If in doubt say Y.
  1023. config ARCH_HAS_HOLES_MEMORYMODEL
  1024. bool
  1025. # Discontigmem is deprecated
  1026. config ARCH_DISCONTIGMEM_ENABLE
  1027. bool
  1028. config ARCH_SPARSEMEM_ENABLE
  1029. bool
  1030. config ARCH_SPARSEMEM_DEFAULT
  1031. def_bool ARCH_SPARSEMEM_ENABLE
  1032. config ARCH_SELECT_MEMORY_MODEL
  1033. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  1034. config NODES_SHIFT
  1035. int
  1036. default "4" if ARCH_LH7A40X
  1037. default "2"
  1038. depends on NEED_MULTIPLE_NODES
  1039. config HIGHMEM
  1040. bool "High Memory Support (EXPERIMENTAL)"
  1041. depends on MMU && EXPERIMENTAL
  1042. help
  1043. The address space of ARM processors is only 4 Gigabytes large
  1044. and it has to accommodate user address space, kernel address
  1045. space as well as some memory mapped IO. That means that, if you
  1046. have a large amount of physical memory and/or IO, not all of the
  1047. memory can be "permanently mapped" by the kernel. The physical
  1048. memory that is not permanently mapped is called "high memory".
  1049. Depending on the selected kernel/user memory split, minimum
  1050. vmalloc space and actual amount of RAM, you may not need this
  1051. option which should result in a slightly faster kernel.
  1052. If unsure, say n.
  1053. config HIGHPTE
  1054. bool "Allocate 2nd-level pagetables from highmem"
  1055. depends on HIGHMEM
  1056. depends on !OUTER_CACHE
  1057. config HW_PERF_EVENTS
  1058. bool "Enable hardware performance counter support for perf events"
  1059. depends on PERF_EVENTS && CPU_HAS_PMU
  1060. default y
  1061. help
  1062. Enable hardware performance counter support for perf events. If
  1063. disabled, perf events will use software events only.
  1064. source "mm/Kconfig"
  1065. config LEDS
  1066. bool "Timer and CPU usage LEDs"
  1067. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1068. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1069. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1070. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1071. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1072. ARCH_AT91 || ARCH_DAVINCI || \
  1073. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1074. help
  1075. If you say Y here, the LEDs on your machine will be used
  1076. to provide useful information about your current system status.
  1077. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1078. be able to select which LEDs are active using the options below. If
  1079. you are compiling a kernel for the EBSA-110 or the LART however, the
  1080. red LED will simply flash regularly to indicate that the system is
  1081. still functional. It is safe to say Y here if you have a CATS
  1082. system, but the driver will do nothing.
  1083. config LEDS_TIMER
  1084. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1085. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1086. || MACH_OMAP_PERSEUS2
  1087. depends on LEDS
  1088. depends on !GENERIC_CLOCKEVENTS
  1089. default y if ARCH_EBSA110
  1090. help
  1091. If you say Y here, one of the system LEDs (the green one on the
  1092. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1093. will flash regularly to indicate that the system is still
  1094. operational. This is mainly useful to kernel hackers who are
  1095. debugging unstable kernels.
  1096. The LART uses the same LED for both Timer LED and CPU usage LED
  1097. functions. You may choose to use both, but the Timer LED function
  1098. will overrule the CPU usage LED.
  1099. config LEDS_CPU
  1100. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1101. !ARCH_OMAP) \
  1102. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1103. || MACH_OMAP_PERSEUS2
  1104. depends on LEDS
  1105. help
  1106. If you say Y here, the red LED will be used to give a good real
  1107. time indication of CPU usage, by lighting whenever the idle task
  1108. is not currently executing.
  1109. The LART uses the same LED for both Timer LED and CPU usage LED
  1110. functions. You may choose to use both, but the Timer LED function
  1111. will overrule the CPU usage LED.
  1112. config ALIGNMENT_TRAP
  1113. bool
  1114. depends on CPU_CP15_MMU
  1115. default y if !ARCH_EBSA110
  1116. select HAVE_PROC_CPU if PROC_FS
  1117. help
  1118. ARM processors cannot fetch/store information which is not
  1119. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1120. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1121. fetch/store instructions will be emulated in software if you say
  1122. here, which has a severe performance impact. This is necessary for
  1123. correct operation of some network protocols. With an IP-only
  1124. configuration it is safe to say N, otherwise say Y.
  1125. config UACCESS_WITH_MEMCPY
  1126. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1127. depends on MMU && EXPERIMENTAL
  1128. default y if CPU_FEROCEON
  1129. help
  1130. Implement faster copy_to_user and clear_user methods for CPU
  1131. cores where a 8-word STM instruction give significantly higher
  1132. memory write throughput than a sequence of individual 32bit stores.
  1133. A possible side effect is a slight increase in scheduling latency
  1134. between threads sharing the same address space if they invoke
  1135. such copy operations with large buffers.
  1136. However, if the CPU data cache is using a write-allocate mode,
  1137. this option is unlikely to provide any performance gain.
  1138. endmenu
  1139. menu "Boot options"
  1140. # Compressed boot loader in ROM. Yes, we really want to ask about
  1141. # TEXT and BSS so we preserve their values in the config files.
  1142. config ZBOOT_ROM_TEXT
  1143. hex "Compressed ROM boot loader base address"
  1144. default "0"
  1145. help
  1146. The physical address at which the ROM-able zImage is to be
  1147. placed in the target. Platforms which normally make use of
  1148. ROM-able zImage formats normally set this to a suitable
  1149. value in their defconfig file.
  1150. If ZBOOT_ROM is not enabled, this has no effect.
  1151. config ZBOOT_ROM_BSS
  1152. hex "Compressed ROM boot loader BSS address"
  1153. default "0"
  1154. help
  1155. The base address of an area of read/write memory in the target
  1156. for the ROM-able zImage which must be available while the
  1157. decompressor is running. It must be large enough to hold the
  1158. entire decompressed kernel plus an additional 128 KiB.
  1159. Platforms which normally make use of ROM-able zImage formats
  1160. normally set this to a suitable value in their defconfig file.
  1161. If ZBOOT_ROM is not enabled, this has no effect.
  1162. config ZBOOT_ROM
  1163. bool "Compressed boot loader in ROM/flash"
  1164. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1165. help
  1166. Say Y here if you intend to execute your compressed kernel image
  1167. (zImage) directly from ROM or flash. If unsure, say N.
  1168. config CMDLINE
  1169. string "Default kernel command string"
  1170. default ""
  1171. help
  1172. On some architectures (EBSA110 and CATS), there is currently no way
  1173. for the boot loader to pass arguments to the kernel. For these
  1174. architectures, you should supply some command-line options at build
  1175. time by entering them here. As a minimum, you should specify the
  1176. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1177. config CMDLINE_FORCE
  1178. bool "Always use the default kernel command string"
  1179. depends on CMDLINE != ""
  1180. help
  1181. Always use the default kernel command string, even if the boot
  1182. loader passes other arguments to the kernel.
  1183. This is useful if you cannot or don't want to change the
  1184. command-line options your boot loader passes to the kernel.
  1185. If unsure, say N.
  1186. config XIP_KERNEL
  1187. bool "Kernel Execute-In-Place from ROM"
  1188. depends on !ZBOOT_ROM
  1189. help
  1190. Execute-In-Place allows the kernel to run from non-volatile storage
  1191. directly addressable by the CPU, such as NOR flash. This saves RAM
  1192. space since the text section of the kernel is not loaded from flash
  1193. to RAM. Read-write sections, such as the data section and stack,
  1194. are still copied to RAM. The XIP kernel is not compressed since
  1195. it has to run directly from flash, so it will take more space to
  1196. store it. The flash address used to link the kernel object files,
  1197. and for storing it, is configuration dependent. Therefore, if you
  1198. say Y here, you must know the proper physical address where to
  1199. store the kernel image depending on your own flash memory usage.
  1200. Also note that the make target becomes "make xipImage" rather than
  1201. "make zImage" or "make Image". The final kernel binary to put in
  1202. ROM memory will be arch/arm/boot/xipImage.
  1203. If unsure, say N.
  1204. config XIP_PHYS_ADDR
  1205. hex "XIP Kernel Physical Location"
  1206. depends on XIP_KERNEL
  1207. default "0x00080000"
  1208. help
  1209. This is the physical address in your flash memory the kernel will
  1210. be linked for and stored to. This address is dependent on your
  1211. own flash usage.
  1212. config KEXEC
  1213. bool "Kexec system call (EXPERIMENTAL)"
  1214. depends on EXPERIMENTAL
  1215. help
  1216. kexec is a system call that implements the ability to shutdown your
  1217. current kernel, and to start another kernel. It is like a reboot
  1218. but it is independent of the system firmware. And like a reboot
  1219. you can start any kernel with it, not just Linux.
  1220. It is an ongoing process to be certain the hardware in a machine
  1221. is properly shutdown, so do not be surprised if this code does not
  1222. initially work for you. It may help to enable device hotplugging
  1223. support.
  1224. config ATAGS_PROC
  1225. bool "Export atags in procfs"
  1226. depends on KEXEC
  1227. default y
  1228. help
  1229. Should the atags used to boot the kernel be exported in an "atags"
  1230. file in procfs. Useful with kexec.
  1231. endmenu
  1232. menu "CPU Power Management"
  1233. if ARCH_HAS_CPUFREQ
  1234. source "drivers/cpufreq/Kconfig"
  1235. config CPU_FREQ_SA1100
  1236. bool
  1237. config CPU_FREQ_SA1110
  1238. bool
  1239. config CPU_FREQ_INTEGRATOR
  1240. tristate "CPUfreq driver for ARM Integrator CPUs"
  1241. depends on ARCH_INTEGRATOR && CPU_FREQ
  1242. default y
  1243. help
  1244. This enables the CPUfreq driver for ARM Integrator CPUs.
  1245. For details, take a look at <file:Documentation/cpu-freq>.
  1246. If in doubt, say Y.
  1247. config CPU_FREQ_PXA
  1248. bool
  1249. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1250. default y
  1251. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1252. config CPU_FREQ_S3C64XX
  1253. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1254. depends on CPU_FREQ && CPU_S3C6410
  1255. config CPU_FREQ_S3C
  1256. bool
  1257. help
  1258. Internal configuration node for common cpufreq on Samsung SoC
  1259. config CPU_FREQ_S3C24XX
  1260. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1261. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1262. select CPU_FREQ_S3C
  1263. help
  1264. This enables the CPUfreq driver for the Samsung S3C24XX family
  1265. of CPUs.
  1266. For details, take a look at <file:Documentation/cpu-freq>.
  1267. If in doubt, say N.
  1268. config CPU_FREQ_S3C24XX_PLL
  1269. bool "Support CPUfreq changing of PLL frequency"
  1270. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1271. help
  1272. Compile in support for changing the PLL frequency from the
  1273. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1274. after a frequency change, so by default it is not enabled.
  1275. This also means that the PLL tables for the selected CPU(s) will
  1276. be built which may increase the size of the kernel image.
  1277. config CPU_FREQ_S3C24XX_DEBUG
  1278. bool "Debug CPUfreq Samsung driver core"
  1279. depends on CPU_FREQ_S3C24XX
  1280. help
  1281. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1282. config CPU_FREQ_S3C24XX_IODEBUG
  1283. bool "Debug CPUfreq Samsung driver IO timing"
  1284. depends on CPU_FREQ_S3C24XX
  1285. help
  1286. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1287. config CPU_FREQ_S3C24XX_DEBUGFS
  1288. bool "Export debugfs for CPUFreq"
  1289. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1290. help
  1291. Export status information via debugfs.
  1292. endif
  1293. source "drivers/cpuidle/Kconfig"
  1294. endmenu
  1295. menu "Floating point emulation"
  1296. comment "At least one emulation must be selected"
  1297. config FPE_NWFPE
  1298. bool "NWFPE math emulation"
  1299. depends on !AEABI || OABI_COMPAT
  1300. ---help---
  1301. Say Y to include the NWFPE floating point emulator in the kernel.
  1302. This is necessary to run most binaries. Linux does not currently
  1303. support floating point hardware so you need to say Y here even if
  1304. your machine has an FPA or floating point co-processor podule.
  1305. You may say N here if you are going to load the Acorn FPEmulator
  1306. early in the bootup.
  1307. config FPE_NWFPE_XP
  1308. bool "Support extended precision"
  1309. depends on FPE_NWFPE
  1310. help
  1311. Say Y to include 80-bit support in the kernel floating-point
  1312. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1313. Note that gcc does not generate 80-bit operations by default,
  1314. so in most cases this option only enlarges the size of the
  1315. floating point emulator without any good reason.
  1316. You almost surely want to say N here.
  1317. config FPE_FASTFPE
  1318. bool "FastFPE math emulation (EXPERIMENTAL)"
  1319. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1320. ---help---
  1321. Say Y here to include the FAST floating point emulator in the kernel.
  1322. This is an experimental much faster emulator which now also has full
  1323. precision for the mantissa. It does not support any exceptions.
  1324. It is very simple, and approximately 3-6 times faster than NWFPE.
  1325. It should be sufficient for most programs. It may be not suitable
  1326. for scientific calculations, but you have to check this for yourself.
  1327. If you do not feel you need a faster FP emulation you should better
  1328. choose NWFPE.
  1329. config VFP
  1330. bool "VFP-format floating point maths"
  1331. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1332. help
  1333. Say Y to include VFP support code in the kernel. This is needed
  1334. if your hardware includes a VFP unit.
  1335. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1336. release notes and additional status information.
  1337. Say N if your target does not have VFP hardware.
  1338. config VFPv3
  1339. bool
  1340. depends on VFP
  1341. default y if CPU_V7
  1342. config NEON
  1343. bool "Advanced SIMD (NEON) Extension support"
  1344. depends on VFPv3 && CPU_V7
  1345. help
  1346. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1347. Extension.
  1348. endmenu
  1349. menu "Userspace binary formats"
  1350. source "fs/Kconfig.binfmt"
  1351. config ARTHUR
  1352. tristate "RISC OS personality"
  1353. depends on !AEABI
  1354. help
  1355. Say Y here to include the kernel code necessary if you want to run
  1356. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1357. experimental; if this sounds frightening, say N and sleep in peace.
  1358. You can also say M here to compile this support as a module (which
  1359. will be called arthur).
  1360. endmenu
  1361. menu "Power management options"
  1362. source "kernel/power/Kconfig"
  1363. config ARCH_SUSPEND_POSSIBLE
  1364. def_bool y
  1365. endmenu
  1366. source "net/Kconfig"
  1367. source "drivers/Kconfig"
  1368. source "fs/Kconfig"
  1369. source "arch/arm/Kconfig.debug"
  1370. source "security/Kconfig"
  1371. source "crypto/Kconfig"
  1372. source "lib/Kconfig"