Kconfig 42 KB

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  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see Documentation/kbuild/kconfig-language.txt.
  4. #
  5. mainmenu "Linux Kernel Configuration"
  6. config ARM
  7. bool
  8. default y
  9. select HAVE_AOUT
  10. select HAVE_IDE
  11. select RTC_LIB
  12. select SYS_SUPPORTS_APM_EMULATION
  13. select GENERIC_ATOMIC64 if (!CPU_32v6K)
  14. select HAVE_OPROFILE
  15. select HAVE_ARCH_KGDB
  16. select HAVE_KPROBES if (!XIP_KERNEL)
  17. select HAVE_KRETPROBES if (HAVE_KPROBES)
  18. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  19. select HAVE_GENERIC_DMA_COHERENT
  20. select HAVE_KERNEL_GZIP
  21. select HAVE_KERNEL_LZO
  22. select HAVE_PERF_EVENTS
  23. select PERF_USE_VMALLOC
  24. help
  25. The ARM series is a line of low-power-consumption RISC chip designs
  26. licensed by ARM Ltd and targeted at embedded applications and
  27. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  28. manufactured, but legacy ARM-based PC hardware remains popular in
  29. Europe. There is an ARM Linux project with a web page at
  30. <http://www.arm.linux.org.uk/>.
  31. config HAVE_PWM
  32. bool
  33. config SYS_SUPPORTS_APM_EMULATION
  34. bool
  35. config GENERIC_GPIO
  36. bool
  37. config GENERIC_TIME
  38. bool
  39. config GENERIC_CLOCKEVENTS
  40. bool
  41. config GENERIC_CLOCKEVENTS_BROADCAST
  42. bool
  43. depends on GENERIC_CLOCKEVENTS
  44. default y if SMP && !LOCAL_TIMERS
  45. config HAVE_TCM
  46. bool
  47. select GENERIC_ALLOCATOR
  48. config HAVE_PROC_CPU
  49. bool
  50. config NO_IOPORT
  51. bool
  52. config EISA
  53. bool
  54. ---help---
  55. The Extended Industry Standard Architecture (EISA) bus was
  56. developed as an open alternative to the IBM MicroChannel bus.
  57. The EISA bus provided some of the features of the IBM MicroChannel
  58. bus while maintaining backward compatibility with cards made for
  59. the older ISA bus. The EISA bus saw limited use between 1988 and
  60. 1995 when it was made obsolete by the PCI bus.
  61. Say Y here if you are building a kernel for an EISA-based machine.
  62. Otherwise, say N.
  63. config SBUS
  64. bool
  65. config MCA
  66. bool
  67. help
  68. MicroChannel Architecture is found in some IBM PS/2 machines and
  69. laptops. It is a bus system similar to PCI or ISA. See
  70. <file:Documentation/mca.txt> (and especially the web page given
  71. there) before attempting to build an MCA bus kernel.
  72. config GENERIC_HARDIRQS
  73. bool
  74. default y
  75. config STACKTRACE_SUPPORT
  76. bool
  77. default y
  78. config HAVE_LATENCYTOP_SUPPORT
  79. bool
  80. depends on !SMP
  81. default y
  82. config LOCKDEP_SUPPORT
  83. bool
  84. default y
  85. config TRACE_IRQFLAGS_SUPPORT
  86. bool
  87. default y
  88. config HARDIRQS_SW_RESEND
  89. bool
  90. default y
  91. config GENERIC_IRQ_PROBE
  92. bool
  93. default y
  94. config GENERIC_LOCKBREAK
  95. bool
  96. default y
  97. depends on SMP && PREEMPT
  98. config RWSEM_GENERIC_SPINLOCK
  99. bool
  100. default y
  101. config RWSEM_XCHGADD_ALGORITHM
  102. bool
  103. config ARCH_HAS_ILOG2_U32
  104. bool
  105. config ARCH_HAS_ILOG2_U64
  106. bool
  107. config ARCH_HAS_CPUFREQ
  108. bool
  109. help
  110. Internal node to signify that the ARCH has CPUFREQ support
  111. and that the relevant menu configurations are displayed for
  112. it.
  113. config GENERIC_HWEIGHT
  114. bool
  115. default y
  116. config GENERIC_CALIBRATE_DELAY
  117. bool
  118. default y
  119. config ARCH_MAY_HAVE_PC_FDC
  120. bool
  121. config ZONE_DMA
  122. bool
  123. config NEED_DMA_MAP_STATE
  124. def_bool y
  125. config GENERIC_ISA_DMA
  126. bool
  127. config FIQ
  128. bool
  129. config ARCH_MTD_XIP
  130. bool
  131. config GENERIC_HARDIRQS_NO__DO_IRQ
  132. def_bool y
  133. config ARM_L1_CACHE_SHIFT_6
  134. bool
  135. help
  136. Setting ARM L1 cache line size to 64 Bytes.
  137. if OPROFILE
  138. config OPROFILE_ARMV6
  139. def_bool y
  140. depends on CPU_V6 && !SMP
  141. select OPROFILE_ARM11_CORE
  142. config OPROFILE_MPCORE
  143. def_bool y
  144. depends on CPU_V6 && SMP
  145. select OPROFILE_ARM11_CORE
  146. config OPROFILE_ARM11_CORE
  147. bool
  148. config OPROFILE_ARMV7
  149. def_bool y
  150. depends on CPU_V7 && !SMP
  151. bool
  152. endif
  153. config VECTORS_BASE
  154. hex
  155. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  156. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  157. default 0x00000000
  158. help
  159. The base address of exception vectors.
  160. source "init/Kconfig"
  161. source "kernel/Kconfig.freezer"
  162. menu "System Type"
  163. config MMU
  164. bool "MMU-based Paged Memory Management Support"
  165. default y
  166. help
  167. Select if you want MMU-based virtualised addressing space
  168. support by paged memory management. If unsure, say 'Y'.
  169. choice
  170. prompt "ARM system type"
  171. default ARCH_VERSATILE
  172. config ARCH_AAEC2000
  173. bool "Agilent AAEC-2000 based"
  174. select CPU_ARM920T
  175. select ARM_AMBA
  176. select HAVE_CLK
  177. help
  178. This enables support for systems based on the Agilent AAEC-2000
  179. config ARCH_INTEGRATOR
  180. bool "ARM Ltd. Integrator family"
  181. select ARM_AMBA
  182. select ARCH_HAS_CPUFREQ
  183. select HAVE_CLK
  184. select COMMON_CLKDEV
  185. select ICST525
  186. help
  187. Support for ARM's Integrator platform.
  188. config ARCH_REALVIEW
  189. bool "ARM Ltd. RealView family"
  190. select ARM_AMBA
  191. select HAVE_CLK
  192. select COMMON_CLKDEV
  193. select ICST307
  194. select GENERIC_TIME
  195. select GENERIC_CLOCKEVENTS
  196. select ARCH_WANT_OPTIONAL_GPIOLIB
  197. help
  198. This enables support for ARM Ltd RealView boards.
  199. config ARCH_VERSATILE
  200. bool "ARM Ltd. Versatile family"
  201. select ARM_AMBA
  202. select ARM_VIC
  203. select HAVE_CLK
  204. select COMMON_CLKDEV
  205. select ICST307
  206. select GENERIC_TIME
  207. select GENERIC_CLOCKEVENTS
  208. select ARCH_WANT_OPTIONAL_GPIOLIB
  209. help
  210. This enables support for ARM Ltd Versatile board.
  211. config ARCH_AT91
  212. bool "Atmel AT91"
  213. select GENERIC_GPIO
  214. select ARCH_REQUIRE_GPIOLIB
  215. select HAVE_CLK
  216. help
  217. This enables support for systems based on the Atmel AT91RM9200,
  218. AT91SAM9 and AT91CAP9 processors.
  219. config ARCH_CLPS711X
  220. bool "Cirrus Logic CLPS711x/EP721x-based"
  221. select CPU_ARM720T
  222. help
  223. Support for Cirrus Logic 711x/721x based boards.
  224. config ARCH_GEMINI
  225. bool "Cortina Systems Gemini"
  226. select CPU_FA526
  227. select GENERIC_GPIO
  228. select ARCH_REQUIRE_GPIOLIB
  229. help
  230. Support for the Cortina Systems Gemini family SoCs
  231. config ARCH_EBSA110
  232. bool "EBSA-110"
  233. select CPU_SA110
  234. select ISA
  235. select NO_IOPORT
  236. help
  237. This is an evaluation board for the StrongARM processor available
  238. from Digital. It has limited hardware on-board, including an
  239. Ethernet interface, two PCMCIA sockets, two serial ports and a
  240. parallel port.
  241. config ARCH_EP93XX
  242. bool "EP93xx-based"
  243. select CPU_ARM920T
  244. select ARM_AMBA
  245. select ARM_VIC
  246. select GENERIC_GPIO
  247. select HAVE_CLK
  248. select COMMON_CLKDEV
  249. select ARCH_REQUIRE_GPIOLIB
  250. select ARCH_HAS_HOLES_MEMORYMODEL
  251. help
  252. This enables support for the Cirrus EP93xx series of CPUs.
  253. config ARCH_FOOTBRIDGE
  254. bool "FootBridge"
  255. select CPU_SA110
  256. select FOOTBRIDGE
  257. help
  258. Support for systems based on the DC21285 companion chip
  259. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  260. config ARCH_MXC
  261. bool "Freescale MXC/iMX-based"
  262. select GENERIC_TIME
  263. select GENERIC_CLOCKEVENTS
  264. select ARCH_MTD_XIP
  265. select GENERIC_GPIO
  266. select ARCH_REQUIRE_GPIOLIB
  267. select HAVE_CLK
  268. help
  269. Support for Freescale MXC/iMX-based family of processors
  270. config ARCH_STMP3XXX
  271. bool "Freescale STMP3xxx"
  272. select CPU_ARM926T
  273. select HAVE_CLK
  274. select COMMON_CLKDEV
  275. select ARCH_REQUIRE_GPIOLIB
  276. select GENERIC_TIME
  277. select GENERIC_CLOCKEVENTS
  278. select GENERIC_GPIO
  279. select USB_ARCH_HAS_EHCI
  280. help
  281. Support for systems based on the Freescale 3xxx CPUs.
  282. config ARCH_NETX
  283. bool "Hilscher NetX based"
  284. select CPU_ARM926T
  285. select ARM_VIC
  286. select GENERIC_CLOCKEVENTS
  287. select GENERIC_TIME
  288. help
  289. This enables support for systems based on the Hilscher NetX Soc
  290. config ARCH_H720X
  291. bool "Hynix HMS720x-based"
  292. select CPU_ARM720T
  293. select ISA_DMA_API
  294. help
  295. This enables support for systems based on the Hynix HMS720x
  296. config ARCH_NOMADIK
  297. bool "STMicroelectronics Nomadik"
  298. select ARM_AMBA
  299. select ARM_VIC
  300. select CPU_ARM926T
  301. select HAVE_CLK
  302. select COMMON_CLKDEV
  303. select GENERIC_TIME
  304. select GENERIC_CLOCKEVENTS
  305. select GENERIC_GPIO
  306. select ARCH_REQUIRE_GPIOLIB
  307. help
  308. Support for the Nomadik platform by ST-Ericsson
  309. config ARCH_IOP13XX
  310. bool "IOP13xx-based"
  311. depends on MMU
  312. select CPU_XSC3
  313. select PLAT_IOP
  314. select PCI
  315. select ARCH_SUPPORTS_MSI
  316. select VMSPLIT_1G
  317. help
  318. Support for Intel's IOP13XX (XScale) family of processors.
  319. config ARCH_IOP32X
  320. bool "IOP32x-based"
  321. depends on MMU
  322. select CPU_XSCALE
  323. select PLAT_IOP
  324. select PCI
  325. select GENERIC_GPIO
  326. select ARCH_REQUIRE_GPIOLIB
  327. help
  328. Support for Intel's 80219 and IOP32X (XScale) family of
  329. processors.
  330. config ARCH_IOP33X
  331. bool "IOP33x-based"
  332. depends on MMU
  333. select CPU_XSCALE
  334. select PLAT_IOP
  335. select PCI
  336. select GENERIC_GPIO
  337. select ARCH_REQUIRE_GPIOLIB
  338. help
  339. Support for Intel's IOP33X (XScale) family of processors.
  340. config ARCH_IXP23XX
  341. bool "IXP23XX-based"
  342. depends on MMU
  343. select CPU_XSC3
  344. select PCI
  345. help
  346. Support for Intel's IXP23xx (XScale) family of processors.
  347. config ARCH_IXP2000
  348. bool "IXP2400/2800-based"
  349. depends on MMU
  350. select CPU_XSCALE
  351. select PCI
  352. help
  353. Support for Intel's IXP2400/2800 (XScale) family of processors.
  354. config ARCH_IXP4XX
  355. bool "IXP4xx-based"
  356. depends on MMU
  357. select CPU_XSCALE
  358. select GENERIC_GPIO
  359. select GENERIC_TIME
  360. select GENERIC_CLOCKEVENTS
  361. select DMABOUNCE if PCI
  362. help
  363. Support for Intel's IXP4XX (XScale) family of processors.
  364. config ARCH_L7200
  365. bool "LinkUp-L7200"
  366. select CPU_ARM720T
  367. select FIQ
  368. help
  369. Say Y here if you intend to run this kernel on a LinkUp Systems
  370. L7200 Software Development Board which uses an ARM720T processor.
  371. Information on this board can be obtained at:
  372. <http://www.linkupsys.com/>
  373. If you have any questions or comments about the Linux kernel port
  374. to this board, send e-mail to <sjhill@cotw.com>.
  375. config ARCH_DOVE
  376. bool "Marvell Dove"
  377. select PCI
  378. select GENERIC_GPIO
  379. select ARCH_REQUIRE_GPIOLIB
  380. select GENERIC_TIME
  381. select GENERIC_CLOCKEVENTS
  382. select PLAT_ORION
  383. help
  384. Support for the Marvell Dove SoC 88AP510
  385. config ARCH_KIRKWOOD
  386. bool "Marvell Kirkwood"
  387. select CPU_FEROCEON
  388. select PCI
  389. select GENERIC_GPIO
  390. select ARCH_REQUIRE_GPIOLIB
  391. select GENERIC_TIME
  392. select GENERIC_CLOCKEVENTS
  393. select PLAT_ORION
  394. help
  395. Support for the following Marvell Kirkwood series SoCs:
  396. 88F6180, 88F6192 and 88F6281.
  397. config ARCH_LOKI
  398. bool "Marvell Loki (88RC8480)"
  399. select CPU_FEROCEON
  400. select GENERIC_TIME
  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 GENERIC_GPIO
  410. select ARCH_REQUIRE_GPIOLIB
  411. select GENERIC_TIME
  412. select GENERIC_CLOCKEVENTS
  413. select PLAT_ORION
  414. help
  415. Support for the following Marvell MV78xx0 series SoCs:
  416. MV781x0, MV782x0.
  417. config ARCH_ORION5X
  418. bool "Marvell Orion"
  419. depends on MMU
  420. select CPU_FEROCEON
  421. select PCI
  422. select GENERIC_GPIO
  423. select ARCH_REQUIRE_GPIOLIB
  424. select GENERIC_TIME
  425. select GENERIC_CLOCKEVENTS
  426. select PLAT_ORION
  427. help
  428. Support for the following Marvell Orion 5x series SoCs:
  429. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  430. Orion-2 (5281), Orion-1-90 (6183).
  431. config ARCH_MMP
  432. bool "Marvell PXA168/910"
  433. depends on MMU
  434. select GENERIC_GPIO
  435. select ARCH_REQUIRE_GPIOLIB
  436. select HAVE_CLK
  437. select COMMON_CLKDEV
  438. select GENERIC_TIME
  439. select GENERIC_CLOCKEVENTS
  440. select TICK_ONESHOT
  441. select PLAT_PXA
  442. help
  443. Support for Marvell's PXA168/910 processor line.
  444. config ARCH_KS8695
  445. bool "Micrel/Kendin KS8695"
  446. select CPU_ARM922T
  447. select GENERIC_GPIO
  448. select ARCH_REQUIRE_GPIOLIB
  449. help
  450. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  451. System-on-Chip devices.
  452. config ARCH_NS9XXX
  453. bool "NetSilicon NS9xxx"
  454. select CPU_ARM926T
  455. select GENERIC_GPIO
  456. select GENERIC_TIME
  457. select GENERIC_CLOCKEVENTS
  458. select HAVE_CLK
  459. help
  460. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  461. System.
  462. <http://www.digi.com/products/microprocessors/index.jsp>
  463. config ARCH_W90X900
  464. bool "Nuvoton W90X900 CPU"
  465. select CPU_ARM926T
  466. select ARCH_REQUIRE_GPIOLIB
  467. select GENERIC_GPIO
  468. select HAVE_CLK
  469. select COMMON_CLKDEV
  470. select GENERIC_TIME
  471. select GENERIC_CLOCKEVENTS
  472. help
  473. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  474. At present, the w90x900 has been renamed nuc900, regarding
  475. the ARM series product line, you can login the following
  476. link address to know more.
  477. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  478. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  479. config ARCH_NUC93X
  480. bool "Nuvoton NUC93X CPU"
  481. select CPU_ARM926T
  482. select HAVE_CLK
  483. select COMMON_CLKDEV
  484. help
  485. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  486. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  487. config ARCH_PNX4008
  488. bool "Philips Nexperia PNX4008 Mobile"
  489. select CPU_ARM926T
  490. select HAVE_CLK
  491. select COMMON_CLKDEV
  492. help
  493. This enables support for Philips PNX4008 mobile platform.
  494. config ARCH_PXA
  495. bool "PXA2xx/PXA3xx-based"
  496. depends on MMU
  497. select ARCH_MTD_XIP
  498. select ARCH_HAS_CPUFREQ
  499. select GENERIC_GPIO
  500. select HAVE_CLK
  501. select COMMON_CLKDEV
  502. select ARCH_REQUIRE_GPIOLIB
  503. select GENERIC_TIME
  504. select GENERIC_CLOCKEVENTS
  505. select TICK_ONESHOT
  506. select PLAT_PXA
  507. help
  508. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  509. config ARCH_MSM
  510. bool "Qualcomm MSM"
  511. select CPU_V6
  512. select GENERIC_TIME
  513. select GENERIC_CLOCKEVENTS
  514. help
  515. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  516. apps processor of the MSM7K and depends on a shared memory
  517. interface to the ARM9 modem processor which runs the baseband stack
  518. and controls some vital subsystems (clock and power control, etc).
  519. config ARCH_RPC
  520. bool "RiscPC"
  521. select ARCH_ACORN
  522. select FIQ
  523. select TIMER_ACORN
  524. select ARCH_MAY_HAVE_PC_FDC
  525. select HAVE_PATA_PLATFORM
  526. select ISA_DMA_API
  527. select NO_IOPORT
  528. select ARCH_SPARSEMEM_ENABLE
  529. help
  530. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  531. CD-ROM interface, serial and parallel port, and the floppy drive.
  532. config ARCH_SA1100
  533. bool "SA1100-based"
  534. select CPU_SA1100
  535. select ISA
  536. select ARCH_SPARSEMEM_ENABLE
  537. select ARCH_MTD_XIP
  538. select ARCH_HAS_CPUFREQ
  539. select CPU_FREQ
  540. select GENERIC_GPIO
  541. select GENERIC_TIME
  542. select GENERIC_CLOCKEVENTS
  543. select HAVE_CLK
  544. select TICK_ONESHOT
  545. select ARCH_REQUIRE_GPIOLIB
  546. help
  547. Support for StrongARM 11x0 based boards.
  548. config ARCH_S3C2410
  549. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  550. select GENERIC_GPIO
  551. select ARCH_HAS_CPUFREQ
  552. select HAVE_CLK
  553. help
  554. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  555. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  556. the Samsung SMDK2410 development board (and derivatives).
  557. config ARCH_S3C64XX
  558. bool "Samsung S3C64XX"
  559. select GENERIC_GPIO
  560. select HAVE_CLK
  561. select ARCH_HAS_CPUFREQ
  562. help
  563. Samsung S3C64XX series based systems
  564. config ARCH_S5PC1XX
  565. bool "Samsung S5PC1XX"
  566. select GENERIC_GPIO
  567. select HAVE_CLK
  568. select CPU_V7
  569. select ARM_L1_CACHE_SHIFT_6
  570. help
  571. Samsung S5PC1XX series based systems
  572. config ARCH_SHARK
  573. bool "Shark"
  574. select CPU_SA110
  575. select ISA
  576. select ISA_DMA
  577. select ZONE_DMA
  578. select PCI
  579. help
  580. Support for the StrongARM based Digital DNARD machine, also known
  581. as "Shark" (<http://www.shark-linux.de/shark.html>).
  582. config ARCH_LH7A40X
  583. bool "Sharp LH7A40X"
  584. select CPU_ARM922T
  585. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  586. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  587. help
  588. Say Y here for systems based on one of the Sharp LH7A40X
  589. System on a Chip processors. These CPUs include an ARM922T
  590. core with a wide array of integrated devices for
  591. hand-held and low-power applications.
  592. config ARCH_U300
  593. bool "ST-Ericsson U300 Series"
  594. depends on MMU
  595. select CPU_ARM926T
  596. select HAVE_TCM
  597. select ARM_AMBA
  598. select ARM_VIC
  599. select GENERIC_TIME
  600. select GENERIC_CLOCKEVENTS
  601. select HAVE_CLK
  602. select COMMON_CLKDEV
  603. select GENERIC_GPIO
  604. help
  605. Support for ST-Ericsson U300 series mobile platforms.
  606. config ARCH_DAVINCI
  607. bool "TI DaVinci"
  608. select CPU_ARM926T
  609. select GENERIC_TIME
  610. select GENERIC_CLOCKEVENTS
  611. select GENERIC_GPIO
  612. select ARCH_REQUIRE_GPIOLIB
  613. select HAVE_CLK
  614. select ZONE_DMA
  615. select HAVE_IDE
  616. select COMMON_CLKDEV
  617. select GENERIC_ALLOCATOR
  618. select ARCH_HAS_HOLES_MEMORYMODEL
  619. help
  620. Support for TI's DaVinci platform.
  621. config ARCH_OMAP
  622. bool "TI OMAP"
  623. select GENERIC_GPIO
  624. select HAVE_CLK
  625. select ARCH_REQUIRE_GPIOLIB
  626. select ARCH_HAS_CPUFREQ
  627. select GENERIC_TIME
  628. select GENERIC_CLOCKEVENTS
  629. select ARCH_HAS_HOLES_MEMORYMODEL
  630. help
  631. Support for TI's OMAP platform (OMAP1 and OMAP2).
  632. config ARCH_BCMRING
  633. bool "Broadcom BCMRING"
  634. depends on MMU
  635. select CPU_V6
  636. select ARM_AMBA
  637. select COMMON_CLKDEV
  638. select GENERIC_TIME
  639. select GENERIC_CLOCKEVENTS
  640. select ARCH_WANT_OPTIONAL_GPIOLIB
  641. help
  642. Support for Broadcom's BCMRing platform.
  643. config ARCH_U8500
  644. bool "ST-Ericsson U8500 Series"
  645. select CPU_V7
  646. select ARM_AMBA
  647. select GENERIC_TIME
  648. select GENERIC_CLOCKEVENTS
  649. select COMMON_CLKDEV
  650. help
  651. Support for ST-Ericsson's Ux500 architecture
  652. endchoice
  653. source "arch/arm/mach-aaec2000/Kconfig"
  654. source "arch/arm/mach-at91/Kconfig"
  655. source "arch/arm/mach-bcmring/Kconfig"
  656. source "arch/arm/mach-clps711x/Kconfig"
  657. source "arch/arm/mach-davinci/Kconfig"
  658. source "arch/arm/mach-dove/Kconfig"
  659. source "arch/arm/mach-ep93xx/Kconfig"
  660. source "arch/arm/mach-footbridge/Kconfig"
  661. source "arch/arm/mach-gemini/Kconfig"
  662. source "arch/arm/mach-h720x/Kconfig"
  663. source "arch/arm/mach-integrator/Kconfig"
  664. source "arch/arm/mach-iop32x/Kconfig"
  665. source "arch/arm/mach-iop33x/Kconfig"
  666. source "arch/arm/mach-iop13xx/Kconfig"
  667. source "arch/arm/mach-ixp4xx/Kconfig"
  668. source "arch/arm/mach-ixp2000/Kconfig"
  669. source "arch/arm/mach-ixp23xx/Kconfig"
  670. source "arch/arm/mach-kirkwood/Kconfig"
  671. source "arch/arm/mach-ks8695/Kconfig"
  672. source "arch/arm/mach-lh7a40x/Kconfig"
  673. source "arch/arm/mach-loki/Kconfig"
  674. source "arch/arm/mach-msm/Kconfig"
  675. source "arch/arm/mach-mv78xx0/Kconfig"
  676. source "arch/arm/plat-mxc/Kconfig"
  677. source "arch/arm/mach-netx/Kconfig"
  678. source "arch/arm/mach-nomadik/Kconfig"
  679. source "arch/arm/plat-nomadik/Kconfig"
  680. source "arch/arm/mach-ns9xxx/Kconfig"
  681. source "arch/arm/mach-nuc93x/Kconfig"
  682. source "arch/arm/plat-omap/Kconfig"
  683. source "arch/arm/mach-omap1/Kconfig"
  684. source "arch/arm/mach-omap2/Kconfig"
  685. source "arch/arm/mach-orion5x/Kconfig"
  686. source "arch/arm/mach-pxa/Kconfig"
  687. source "arch/arm/plat-pxa/Kconfig"
  688. source "arch/arm/mach-mmp/Kconfig"
  689. source "arch/arm/mach-realview/Kconfig"
  690. source "arch/arm/mach-sa1100/Kconfig"
  691. source "arch/arm/plat-samsung/Kconfig"
  692. source "arch/arm/plat-s3c24xx/Kconfig"
  693. source "arch/arm/plat-s3c64xx/Kconfig"
  694. source "arch/arm/plat-s3c/Kconfig"
  695. source "arch/arm/plat-s5pc1xx/Kconfig"
  696. if ARCH_S3C2410
  697. source "arch/arm/mach-s3c2400/Kconfig"
  698. source "arch/arm/mach-s3c2410/Kconfig"
  699. source "arch/arm/mach-s3c2412/Kconfig"
  700. source "arch/arm/mach-s3c2440/Kconfig"
  701. source "arch/arm/mach-s3c2442/Kconfig"
  702. source "arch/arm/mach-s3c2443/Kconfig"
  703. endif
  704. if ARCH_S3C64XX
  705. source "arch/arm/mach-s3c6400/Kconfig"
  706. source "arch/arm/mach-s3c6410/Kconfig"
  707. endif
  708. source "arch/arm/plat-stmp3xxx/Kconfig"
  709. if ARCH_S5PC1XX
  710. source "arch/arm/mach-s5pc100/Kconfig"
  711. endif
  712. source "arch/arm/mach-u300/Kconfig"
  713. source "arch/arm/mach-ux500/Kconfig"
  714. source "arch/arm/mach-versatile/Kconfig"
  715. source "arch/arm/mach-w90x900/Kconfig"
  716. # Definitions to make life easier
  717. config ARCH_ACORN
  718. bool
  719. config PLAT_IOP
  720. bool
  721. select GENERIC_CLOCKEVENTS
  722. select GENERIC_TIME
  723. config PLAT_ORION
  724. bool
  725. config PLAT_PXA
  726. bool
  727. source arch/arm/mm/Kconfig
  728. config IWMMXT
  729. bool "Enable iWMMXt support"
  730. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  731. default y if PXA27x || PXA3xx || ARCH_MMP
  732. help
  733. Enable support for iWMMXt context switching at run time if
  734. running on a CPU that supports it.
  735. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  736. config XSCALE_PMU
  737. bool
  738. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  739. default y
  740. config CPU_HAS_PMU
  741. depends on CPU_V6 || CPU_V7 || XSCALE_PMU
  742. default y
  743. bool
  744. if !MMU
  745. source "arch/arm/Kconfig-nommu"
  746. endif
  747. config ARM_ERRATA_411920
  748. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  749. depends on CPU_V6 && !SMP
  750. help
  751. Invalidation of the Instruction Cache operation can
  752. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  753. It does not affect the MPCore. This option enables the ARM Ltd.
  754. recommended workaround.
  755. config ARM_ERRATA_430973
  756. bool "ARM errata: Stale prediction on replaced interworking branch"
  757. depends on CPU_V7
  758. help
  759. This option enables the workaround for the 430973 Cortex-A8
  760. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  761. interworking branch is replaced with another code sequence at the
  762. same virtual address, whether due to self-modifying code or virtual
  763. to physical address re-mapping, Cortex-A8 does not recover from the
  764. stale interworking branch prediction. This results in Cortex-A8
  765. executing the new code sequence in the incorrect ARM or Thumb state.
  766. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  767. and also flushes the branch target cache at every context switch.
  768. Note that setting specific bits in the ACTLR register may not be
  769. available in non-secure mode.
  770. config ARM_ERRATA_458693
  771. bool "ARM errata: Processor deadlock when a false hazard is created"
  772. depends on CPU_V7
  773. help
  774. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  775. erratum. For very specific sequences of memory operations, it is
  776. possible for a hazard condition intended for a cache line to instead
  777. be incorrectly associated with a different cache line. This false
  778. hazard might then cause a processor deadlock. The workaround enables
  779. the L1 caching of the NEON accesses and disables the PLD instruction
  780. in the ACTLR register. Note that setting specific bits in the ACTLR
  781. register may not be available in non-secure mode.
  782. config ARM_ERRATA_460075
  783. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  784. depends on CPU_V7
  785. help
  786. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  787. erratum. Any asynchronous access to the L2 cache may encounter a
  788. situation in which recent store transactions to the L2 cache are lost
  789. and overwritten with stale memory contents from external memory. The
  790. workaround disables the write-allocate mode for the L2 cache via the
  791. ACTLR register. Note that setting specific bits in the ACTLR register
  792. may not be available in non-secure mode.
  793. config PL310_ERRATA_588369
  794. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  795. depends on CACHE_L2X0 && ARCH_OMAP4
  796. help
  797. The PL310 L2 cache controller implements three types of Clean &
  798. Invalidate maintenance operations: by Physical Address
  799. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  800. They are architecturally defined to behave as the execution of a
  801. clean operation followed immediately by an invalidate operation,
  802. both performing to the same memory location. This functionality
  803. is not correctly implemented in PL310 as clean lines are not
  804. invalidated as a result of these operations. Note that this errata
  805. uses Texas Instrument's secure monitor api.
  806. endmenu
  807. source "arch/arm/common/Kconfig"
  808. config FORCE_MAX_ZONEORDER
  809. int
  810. depends on SA1111
  811. default "9"
  812. menu "Bus support"
  813. config ARM_AMBA
  814. bool
  815. config ISA
  816. bool
  817. help
  818. Find out whether you have ISA slots on your motherboard. ISA is the
  819. name of a bus system, i.e. the way the CPU talks to the other stuff
  820. inside your box. Other bus systems are PCI, EISA, MicroChannel
  821. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  822. newer boards don't support it. If you have ISA, say Y, otherwise N.
  823. # Select ISA DMA controller support
  824. config ISA_DMA
  825. bool
  826. select ISA_DMA_API
  827. # Select ISA DMA interface
  828. config ISA_DMA_API
  829. bool
  830. config PCI
  831. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  832. help
  833. Find out whether you have a PCI motherboard. PCI is the name of a
  834. bus system, i.e. the way the CPU talks to the other stuff inside
  835. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  836. VESA. If you have PCI, say Y, otherwise N.
  837. config PCI_SYSCALL
  838. def_bool PCI
  839. # Select the host bridge type
  840. config PCI_HOST_VIA82C505
  841. bool
  842. depends on PCI && ARCH_SHARK
  843. default y
  844. config PCI_HOST_ITE8152
  845. bool
  846. depends on PCI && MACH_ARMCORE
  847. default y
  848. select DMABOUNCE
  849. source "drivers/pci/Kconfig"
  850. source "drivers/pcmcia/Kconfig"
  851. endmenu
  852. menu "Kernel Features"
  853. source "kernel/time/Kconfig"
  854. config SMP
  855. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  856. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  857. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  858. depends on GENERIC_CLOCKEVENTS
  859. select USE_GENERIC_SMP_HELPERS
  860. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  861. help
  862. This enables support for systems with more than one CPU. If you have
  863. a system with only one CPU, like most personal computers, say N. If
  864. you have a system with more than one CPU, say Y.
  865. If you say N here, the kernel will run on single and multiprocessor
  866. machines, but will use only one CPU of a multiprocessor machine. If
  867. you say Y here, the kernel will run on many, but not all, single
  868. processor machines. On a single processor machine, the kernel will
  869. run faster if you say N here.
  870. See also <file:Documentation/i386/IO-APIC.txt>,
  871. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  872. <http://www.linuxdoc.org/docs.html#howto>.
  873. If you don't know what to do here, say N.
  874. config HAVE_ARM_SCU
  875. bool
  876. depends on SMP
  877. help
  878. This option enables support for the ARM system coherency unit
  879. config HAVE_ARM_TWD
  880. bool
  881. depends on SMP
  882. help
  883. This options enables support for the ARM timer and watchdog unit
  884. choice
  885. prompt "Memory split"
  886. default VMSPLIT_3G
  887. help
  888. Select the desired split between kernel and user memory.
  889. If you are not absolutely sure what you are doing, leave this
  890. option alone!
  891. config VMSPLIT_3G
  892. bool "3G/1G user/kernel split"
  893. config VMSPLIT_2G
  894. bool "2G/2G user/kernel split"
  895. config VMSPLIT_1G
  896. bool "1G/3G user/kernel split"
  897. endchoice
  898. config PAGE_OFFSET
  899. hex
  900. default 0x40000000 if VMSPLIT_1G
  901. default 0x80000000 if VMSPLIT_2G
  902. default 0xC0000000
  903. config NR_CPUS
  904. int "Maximum number of CPUs (2-32)"
  905. range 2 32
  906. depends on SMP
  907. default "4"
  908. config HOTPLUG_CPU
  909. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  910. depends on SMP && HOTPLUG && EXPERIMENTAL
  911. help
  912. Say Y here to experiment with turning CPUs off and on. CPUs
  913. can be controlled through /sys/devices/system/cpu.
  914. config LOCAL_TIMERS
  915. bool "Use local timer interrupts"
  916. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  917. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  918. default y
  919. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  920. help
  921. Enable support for local timers on SMP platforms, rather then the
  922. legacy IPI broadcast method. Local timers allows the system
  923. accounting to be spread across the timer interval, preventing a
  924. "thundering herd" at every timer tick.
  925. source kernel/Kconfig.preempt
  926. config HZ
  927. int
  928. default 128 if ARCH_L7200
  929. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  930. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  931. default AT91_TIMER_HZ if ARCH_AT91
  932. default 100
  933. config THUMB2_KERNEL
  934. bool "Compile the kernel in Thumb-2 mode"
  935. depends on CPU_V7 && EXPERIMENTAL
  936. select AEABI
  937. select ARM_ASM_UNIFIED
  938. help
  939. By enabling this option, the kernel will be compiled in
  940. Thumb-2 mode. A compiler/assembler that understand the unified
  941. ARM-Thumb syntax is needed.
  942. If unsure, say N.
  943. config ARM_ASM_UNIFIED
  944. bool
  945. config AEABI
  946. bool "Use the ARM EABI to compile the kernel"
  947. help
  948. This option allows for the kernel to be compiled using the latest
  949. ARM ABI (aka EABI). This is only useful if you are using a user
  950. space environment that is also compiled with EABI.
  951. Since there are major incompatibilities between the legacy ABI and
  952. EABI, especially with regard to structure member alignment, this
  953. option also changes the kernel syscall calling convention to
  954. disambiguate both ABIs and allow for backward compatibility support
  955. (selected with CONFIG_OABI_COMPAT).
  956. To use this you need GCC version 4.0.0 or later.
  957. config OABI_COMPAT
  958. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  959. depends on AEABI && EXPERIMENTAL
  960. default y
  961. help
  962. This option preserves the old syscall interface along with the
  963. new (ARM EABI) one. It also provides a compatibility layer to
  964. intercept syscalls that have structure arguments which layout
  965. in memory differs between the legacy ABI and the new ARM EABI
  966. (only for non "thumb" binaries). This option adds a tiny
  967. overhead to all syscalls and produces a slightly larger kernel.
  968. If you know you'll be using only pure EABI user space then you
  969. can say N here. If this option is not selected and you attempt
  970. to execute a legacy ABI binary then the result will be
  971. UNPREDICTABLE (in fact it can be predicted that it won't work
  972. at all). If in doubt say Y.
  973. config ARCH_HAS_HOLES_MEMORYMODEL
  974. bool
  975. # Discontigmem is deprecated
  976. config ARCH_DISCONTIGMEM_ENABLE
  977. bool
  978. config ARCH_SPARSEMEM_ENABLE
  979. bool
  980. config ARCH_SPARSEMEM_DEFAULT
  981. def_bool ARCH_SPARSEMEM_ENABLE
  982. config ARCH_SELECT_MEMORY_MODEL
  983. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  984. config NODES_SHIFT
  985. int
  986. default "4" if ARCH_LH7A40X
  987. default "2"
  988. depends on NEED_MULTIPLE_NODES
  989. config HIGHMEM
  990. bool "High Memory Support (EXPERIMENTAL)"
  991. depends on MMU && EXPERIMENTAL
  992. help
  993. The address space of ARM processors is only 4 Gigabytes large
  994. and it has to accommodate user address space, kernel address
  995. space as well as some memory mapped IO. That means that, if you
  996. have a large amount of physical memory and/or IO, not all of the
  997. memory can be "permanently mapped" by the kernel. The physical
  998. memory that is not permanently mapped is called "high memory".
  999. Depending on the selected kernel/user memory split, minimum
  1000. vmalloc space and actual amount of RAM, you may not need this
  1001. option which should result in a slightly faster kernel.
  1002. If unsure, say n.
  1003. config HIGHPTE
  1004. bool "Allocate 2nd-level pagetables from highmem"
  1005. depends on HIGHMEM
  1006. depends on !OUTER_CACHE
  1007. config HW_PERF_EVENTS
  1008. bool "Enable hardware performance counter support for perf events"
  1009. depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
  1010. default y
  1011. help
  1012. Enable hardware performance counter support for perf events. If
  1013. disabled, perf events will use software events only.
  1014. source "mm/Kconfig"
  1015. config LEDS
  1016. bool "Timer and CPU usage LEDs"
  1017. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1018. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1019. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1020. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1021. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1022. ARCH_AT91 || ARCH_DAVINCI || \
  1023. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1024. help
  1025. If you say Y here, the LEDs on your machine will be used
  1026. to provide useful information about your current system status.
  1027. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1028. be able to select which LEDs are active using the options below. If
  1029. you are compiling a kernel for the EBSA-110 or the LART however, the
  1030. red LED will simply flash regularly to indicate that the system is
  1031. still functional. It is safe to say Y here if you have a CATS
  1032. system, but the driver will do nothing.
  1033. config LEDS_TIMER
  1034. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1035. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1036. || MACH_OMAP_PERSEUS2
  1037. depends on LEDS
  1038. depends on !GENERIC_CLOCKEVENTS
  1039. default y if ARCH_EBSA110
  1040. help
  1041. If you say Y here, one of the system LEDs (the green one on the
  1042. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1043. will flash regularly to indicate that the system is still
  1044. operational. This is mainly useful to kernel hackers who are
  1045. debugging unstable kernels.
  1046. The LART uses the same LED for both Timer LED and CPU usage LED
  1047. functions. You may choose to use both, but the Timer LED function
  1048. will overrule the CPU usage LED.
  1049. config LEDS_CPU
  1050. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1051. !ARCH_OMAP) \
  1052. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1053. || MACH_OMAP_PERSEUS2
  1054. depends on LEDS
  1055. help
  1056. If you say Y here, the red LED will be used to give a good real
  1057. time indication of CPU usage, by lighting whenever the idle task
  1058. is not currently executing.
  1059. The LART uses the same LED for both Timer LED and CPU usage LED
  1060. functions. You may choose to use both, but the Timer LED function
  1061. will overrule the CPU usage LED.
  1062. config ALIGNMENT_TRAP
  1063. bool
  1064. depends on CPU_CP15_MMU
  1065. default y if !ARCH_EBSA110
  1066. select HAVE_PROC_CPU if PROC_FS
  1067. help
  1068. ARM processors cannot fetch/store information which is not
  1069. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1070. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1071. fetch/store instructions will be emulated in software if you say
  1072. here, which has a severe performance impact. This is necessary for
  1073. correct operation of some network protocols. With an IP-only
  1074. configuration it is safe to say N, otherwise say Y.
  1075. config UACCESS_WITH_MEMCPY
  1076. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1077. depends on MMU && EXPERIMENTAL
  1078. default y if CPU_FEROCEON
  1079. help
  1080. Implement faster copy_to_user and clear_user methods for CPU
  1081. cores where a 8-word STM instruction give significantly higher
  1082. memory write throughput than a sequence of individual 32bit stores.
  1083. A possible side effect is a slight increase in scheduling latency
  1084. between threads sharing the same address space if they invoke
  1085. such copy operations with large buffers.
  1086. However, if the CPU data cache is using a write-allocate mode,
  1087. this option is unlikely to provide any performance gain.
  1088. endmenu
  1089. menu "Boot options"
  1090. # Compressed boot loader in ROM. Yes, we really want to ask about
  1091. # TEXT and BSS so we preserve their values in the config files.
  1092. config ZBOOT_ROM_TEXT
  1093. hex "Compressed ROM boot loader base address"
  1094. default "0"
  1095. help
  1096. The physical address at which the ROM-able zImage is to be
  1097. placed in the target. Platforms which normally make use of
  1098. ROM-able zImage formats normally set this to a suitable
  1099. value in their defconfig file.
  1100. If ZBOOT_ROM is not enabled, this has no effect.
  1101. config ZBOOT_ROM_BSS
  1102. hex "Compressed ROM boot loader BSS address"
  1103. default "0"
  1104. help
  1105. The base address of an area of read/write memory in the target
  1106. for the ROM-able zImage which must be available while the
  1107. decompressor is running. It must be large enough to hold the
  1108. entire decompressed kernel plus an additional 128 KiB.
  1109. Platforms which normally make use of ROM-able zImage formats
  1110. normally set this to a suitable value in their defconfig file.
  1111. If ZBOOT_ROM is not enabled, this has no effect.
  1112. config ZBOOT_ROM
  1113. bool "Compressed boot loader in ROM/flash"
  1114. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1115. help
  1116. Say Y here if you intend to execute your compressed kernel image
  1117. (zImage) directly from ROM or flash. If unsure, say N.
  1118. config CMDLINE
  1119. string "Default kernel command string"
  1120. default ""
  1121. help
  1122. On some architectures (EBSA110 and CATS), there is currently no way
  1123. for the boot loader to pass arguments to the kernel. For these
  1124. architectures, you should supply some command-line options at build
  1125. time by entering them here. As a minimum, you should specify the
  1126. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1127. config XIP_KERNEL
  1128. bool "Kernel Execute-In-Place from ROM"
  1129. depends on !ZBOOT_ROM
  1130. help
  1131. Execute-In-Place allows the kernel to run from non-volatile storage
  1132. directly addressable by the CPU, such as NOR flash. This saves RAM
  1133. space since the text section of the kernel is not loaded from flash
  1134. to RAM. Read-write sections, such as the data section and stack,
  1135. are still copied to RAM. The XIP kernel is not compressed since
  1136. it has to run directly from flash, so it will take more space to
  1137. store it. The flash address used to link the kernel object files,
  1138. and for storing it, is configuration dependent. Therefore, if you
  1139. say Y here, you must know the proper physical address where to
  1140. store the kernel image depending on your own flash memory usage.
  1141. Also note that the make target becomes "make xipImage" rather than
  1142. "make zImage" or "make Image". The final kernel binary to put in
  1143. ROM memory will be arch/arm/boot/xipImage.
  1144. If unsure, say N.
  1145. config XIP_PHYS_ADDR
  1146. hex "XIP Kernel Physical Location"
  1147. depends on XIP_KERNEL
  1148. default "0x00080000"
  1149. help
  1150. This is the physical address in your flash memory the kernel will
  1151. be linked for and stored to. This address is dependent on your
  1152. own flash usage.
  1153. config KEXEC
  1154. bool "Kexec system call (EXPERIMENTAL)"
  1155. depends on EXPERIMENTAL
  1156. help
  1157. kexec is a system call that implements the ability to shutdown your
  1158. current kernel, and to start another kernel. It is like a reboot
  1159. but it is independent of the system firmware. And like a reboot
  1160. you can start any kernel with it, not just Linux.
  1161. It is an ongoing process to be certain the hardware in a machine
  1162. is properly shutdown, so do not be surprised if this code does not
  1163. initially work for you. It may help to enable device hotplugging
  1164. support.
  1165. config ATAGS_PROC
  1166. bool "Export atags in procfs"
  1167. depends on KEXEC
  1168. default y
  1169. help
  1170. Should the atags used to boot the kernel be exported in an "atags"
  1171. file in procfs. Useful with kexec.
  1172. endmenu
  1173. menu "CPU Power Management"
  1174. if ARCH_HAS_CPUFREQ
  1175. source "drivers/cpufreq/Kconfig"
  1176. config CPU_FREQ_SA1100
  1177. bool
  1178. config CPU_FREQ_SA1110
  1179. bool
  1180. config CPU_FREQ_INTEGRATOR
  1181. tristate "CPUfreq driver for ARM Integrator CPUs"
  1182. depends on ARCH_INTEGRATOR && CPU_FREQ
  1183. default y
  1184. help
  1185. This enables the CPUfreq driver for ARM Integrator CPUs.
  1186. For details, take a look at <file:Documentation/cpu-freq>.
  1187. If in doubt, say Y.
  1188. config CPU_FREQ_PXA
  1189. bool
  1190. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1191. default y
  1192. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1193. config CPU_FREQ_S3C64XX
  1194. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1195. depends on CPU_FREQ && CPU_S3C6410
  1196. config CPU_FREQ_S3C
  1197. bool
  1198. help
  1199. Internal configuration node for common cpufreq on Samsung SoC
  1200. config CPU_FREQ_S3C24XX
  1201. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1202. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1203. select CPU_FREQ_S3C
  1204. help
  1205. This enables the CPUfreq driver for the Samsung S3C24XX family
  1206. of CPUs.
  1207. For details, take a look at <file:Documentation/cpu-freq>.
  1208. If in doubt, say N.
  1209. config CPU_FREQ_S3C24XX_PLL
  1210. bool "Support CPUfreq changing of PLL frequency"
  1211. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1212. help
  1213. Compile in support for changing the PLL frequency from the
  1214. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1215. after a frequency change, so by default it is not enabled.
  1216. This also means that the PLL tables for the selected CPU(s) will
  1217. be built which may increase the size of the kernel image.
  1218. config CPU_FREQ_S3C24XX_DEBUG
  1219. bool "Debug CPUfreq Samsung driver core"
  1220. depends on CPU_FREQ_S3C24XX
  1221. help
  1222. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1223. config CPU_FREQ_S3C24XX_IODEBUG
  1224. bool "Debug CPUfreq Samsung driver IO timing"
  1225. depends on CPU_FREQ_S3C24XX
  1226. help
  1227. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1228. config CPU_FREQ_S3C24XX_DEBUGFS
  1229. bool "Export debugfs for CPUFreq"
  1230. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1231. help
  1232. Export status information via debugfs.
  1233. endif
  1234. source "drivers/cpuidle/Kconfig"
  1235. endmenu
  1236. menu "Floating point emulation"
  1237. comment "At least one emulation must be selected"
  1238. config FPE_NWFPE
  1239. bool "NWFPE math emulation"
  1240. depends on !AEABI || OABI_COMPAT
  1241. ---help---
  1242. Say Y to include the NWFPE floating point emulator in the kernel.
  1243. This is necessary to run most binaries. Linux does not currently
  1244. support floating point hardware so you need to say Y here even if
  1245. your machine has an FPA or floating point co-processor podule.
  1246. You may say N here if you are going to load the Acorn FPEmulator
  1247. early in the bootup.
  1248. config FPE_NWFPE_XP
  1249. bool "Support extended precision"
  1250. depends on FPE_NWFPE
  1251. help
  1252. Say Y to include 80-bit support in the kernel floating-point
  1253. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1254. Note that gcc does not generate 80-bit operations by default,
  1255. so in most cases this option only enlarges the size of the
  1256. floating point emulator without any good reason.
  1257. You almost surely want to say N here.
  1258. config FPE_FASTFPE
  1259. bool "FastFPE math emulation (EXPERIMENTAL)"
  1260. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1261. ---help---
  1262. Say Y here to include the FAST floating point emulator in the kernel.
  1263. This is an experimental much faster emulator which now also has full
  1264. precision for the mantissa. It does not support any exceptions.
  1265. It is very simple, and approximately 3-6 times faster than NWFPE.
  1266. It should be sufficient for most programs. It may be not suitable
  1267. for scientific calculations, but you have to check this for yourself.
  1268. If you do not feel you need a faster FP emulation you should better
  1269. choose NWFPE.
  1270. config VFP
  1271. bool "VFP-format floating point maths"
  1272. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1273. help
  1274. Say Y to include VFP support code in the kernel. This is needed
  1275. if your hardware includes a VFP unit.
  1276. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1277. release notes and additional status information.
  1278. Say N if your target does not have VFP hardware.
  1279. config VFPv3
  1280. bool
  1281. depends on VFP
  1282. default y if CPU_V7
  1283. config NEON
  1284. bool "Advanced SIMD (NEON) Extension support"
  1285. depends on VFPv3 && CPU_V7
  1286. help
  1287. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1288. Extension.
  1289. endmenu
  1290. menu "Userspace binary formats"
  1291. source "fs/Kconfig.binfmt"
  1292. config ARTHUR
  1293. tristate "RISC OS personality"
  1294. depends on !AEABI
  1295. help
  1296. Say Y here to include the kernel code necessary if you want to run
  1297. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1298. experimental; if this sounds frightening, say N and sleep in peace.
  1299. You can also say M here to compile this support as a module (which
  1300. will be called arthur).
  1301. endmenu
  1302. menu "Power management options"
  1303. source "kernel/power/Kconfig"
  1304. config ARCH_SUSPEND_POSSIBLE
  1305. def_bool y
  1306. endmenu
  1307. source "net/Kconfig"
  1308. source "drivers/Kconfig"
  1309. source "fs/Kconfig"
  1310. source "arch/arm/Kconfig.debug"
  1311. source "security/Kconfig"
  1312. source "crypto/Kconfig"
  1313. source "lib/Kconfig"