Kconfig 43 KB

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  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see Documentation/kbuild/kconfig-language.txt.
  4. #
  5. mainmenu "Linux Kernel Configuration"
  6. config ARM
  7. bool
  8. default y
  9. select HAVE_AOUT
  10. select HAVE_IDE
  11. select RTC_LIB
  12. select SYS_SUPPORTS_APM_EMULATION
  13. select GENERIC_ATOMIC64 if (!CPU_32v6K)
  14. select HAVE_OPROFILE
  15. select HAVE_ARCH_KGDB
  16. select HAVE_KPROBES if (!XIP_KERNEL)
  17. select HAVE_KRETPROBES if (HAVE_KPROBES)
  18. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  19. select HAVE_GENERIC_DMA_COHERENT
  20. select HAVE_KERNEL_GZIP
  21. select HAVE_KERNEL_LZO
  22. select HAVE_PERF_EVENTS
  23. select PERF_USE_VMALLOC
  24. help
  25. The ARM series is a line of low-power-consumption RISC chip designs
  26. licensed by ARM Ltd and targeted at embedded applications and
  27. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  28. manufactured, but legacy ARM-based PC hardware remains popular in
  29. Europe. There is an ARM Linux project with a web page at
  30. <http://www.arm.linux.org.uk/>.
  31. config HAVE_PWM
  32. bool
  33. config SYS_SUPPORTS_APM_EMULATION
  34. bool
  35. config GENERIC_GPIO
  36. bool
  37. config GENERIC_TIME
  38. bool
  39. config GENERIC_CLOCKEVENTS
  40. bool
  41. config GENERIC_CLOCKEVENTS_BROADCAST
  42. bool
  43. depends on GENERIC_CLOCKEVENTS
  44. default y if SMP && !LOCAL_TIMERS
  45. config HAVE_TCM
  46. bool
  47. select GENERIC_ALLOCATOR
  48. config HAVE_PROC_CPU
  49. bool
  50. config NO_IOPORT
  51. bool
  52. config EISA
  53. bool
  54. ---help---
  55. The Extended Industry Standard Architecture (EISA) bus was
  56. developed as an open alternative to the IBM MicroChannel bus.
  57. The EISA bus provided some of the features of the IBM MicroChannel
  58. bus while maintaining backward compatibility with cards made for
  59. the older ISA bus. The EISA bus saw limited use between 1988 and
  60. 1995 when it was made obsolete by the PCI bus.
  61. Say Y here if you are building a kernel for an EISA-based machine.
  62. Otherwise, say N.
  63. config SBUS
  64. bool
  65. config MCA
  66. bool
  67. help
  68. MicroChannel Architecture is found in some IBM PS/2 machines and
  69. laptops. It is a bus system similar to PCI or ISA. See
  70. <file:Documentation/mca.txt> (and especially the web page given
  71. there) before attempting to build an MCA bus kernel.
  72. config GENERIC_HARDIRQS
  73. bool
  74. default y
  75. config STACKTRACE_SUPPORT
  76. bool
  77. default y
  78. config HAVE_LATENCYTOP_SUPPORT
  79. bool
  80. depends on !SMP
  81. default y
  82. config LOCKDEP_SUPPORT
  83. bool
  84. default y
  85. config TRACE_IRQFLAGS_SUPPORT
  86. bool
  87. default y
  88. config HARDIRQS_SW_RESEND
  89. bool
  90. default y
  91. config GENERIC_IRQ_PROBE
  92. bool
  93. default y
  94. config GENERIC_LOCKBREAK
  95. bool
  96. default y
  97. depends on SMP && PREEMPT
  98. config RWSEM_GENERIC_SPINLOCK
  99. bool
  100. default y
  101. config RWSEM_XCHGADD_ALGORITHM
  102. bool
  103. config ARCH_HAS_ILOG2_U32
  104. bool
  105. config ARCH_HAS_ILOG2_U64
  106. bool
  107. config ARCH_HAS_CPUFREQ
  108. bool
  109. help
  110. Internal node to signify that the ARCH has CPUFREQ support
  111. and that the relevant menu configurations are displayed for
  112. it.
  113. config GENERIC_HWEIGHT
  114. bool
  115. default y
  116. config GENERIC_CALIBRATE_DELAY
  117. bool
  118. default y
  119. config ARCH_MAY_HAVE_PC_FDC
  120. bool
  121. config ZONE_DMA
  122. bool
  123. config NEED_DMA_MAP_STATE
  124. def_bool y
  125. config GENERIC_ISA_DMA
  126. bool
  127. config FIQ
  128. bool
  129. config ARCH_MTD_XIP
  130. bool
  131. config GENERIC_HARDIRQS_NO__DO_IRQ
  132. def_bool y
  133. config ARM_L1_CACHE_SHIFT_6
  134. bool
  135. help
  136. Setting ARM L1 cache line size to 64 Bytes.
  137. if OPROFILE
  138. config OPROFILE_ARMV6
  139. def_bool y
  140. depends on CPU_V6 && !SMP
  141. select OPROFILE_ARM11_CORE
  142. config OPROFILE_MPCORE
  143. def_bool y
  144. depends on CPU_V6 && SMP
  145. select OPROFILE_ARM11_CORE
  146. config OPROFILE_ARM11_CORE
  147. bool
  148. config OPROFILE_ARMV7
  149. def_bool y
  150. depends on CPU_V7 && !SMP
  151. bool
  152. endif
  153. config VECTORS_BASE
  154. hex
  155. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  156. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  157. default 0x00000000
  158. help
  159. The base address of exception vectors.
  160. source "init/Kconfig"
  161. source "kernel/Kconfig.freezer"
  162. menu "System Type"
  163. config MMU
  164. bool "MMU-based Paged Memory Management Support"
  165. default y
  166. help
  167. Select if you want MMU-based virtualised addressing space
  168. support by paged memory management. If unsure, say 'Y'.
  169. #
  170. # The "ARM system type" choice list is ordered alphabetically by option
  171. # text. Please add new entries in the option alphabetic order.
  172. #
  173. choice
  174. prompt "ARM system type"
  175. default ARCH_VERSATILE
  176. config ARCH_AAEC2000
  177. bool "Agilent AAEC-2000 based"
  178. select CPU_ARM920T
  179. select ARM_AMBA
  180. select HAVE_CLK
  181. help
  182. This enables support for systems based on the Agilent AAEC-2000
  183. config ARCH_INTEGRATOR
  184. bool "ARM Ltd. Integrator family"
  185. select ARM_AMBA
  186. select ARCH_HAS_CPUFREQ
  187. select HAVE_CLK
  188. select COMMON_CLKDEV
  189. select ICST
  190. select GENERIC_TIME
  191. select GENERIC_CLOCKEVENTS
  192. select PLAT_VERSATILE
  193. help
  194. Support for ARM's Integrator platform.
  195. config ARCH_REALVIEW
  196. bool "ARM Ltd. RealView family"
  197. select ARM_AMBA
  198. select HAVE_CLK
  199. select COMMON_CLKDEV
  200. select ICST
  201. select GENERIC_TIME
  202. select GENERIC_CLOCKEVENTS
  203. select ARCH_WANT_OPTIONAL_GPIOLIB
  204. select PLAT_VERSATILE
  205. help
  206. This enables support for ARM Ltd RealView boards.
  207. config ARCH_VERSATILE
  208. bool "ARM Ltd. Versatile family"
  209. select ARM_AMBA
  210. select ARM_VIC
  211. select HAVE_CLK
  212. select COMMON_CLKDEV
  213. select ICST
  214. select GENERIC_TIME
  215. select GENERIC_CLOCKEVENTS
  216. select ARCH_WANT_OPTIONAL_GPIOLIB
  217. select PLAT_VERSATILE
  218. help
  219. This enables support for ARM Ltd Versatile board.
  220. config ARCH_AT91
  221. bool "Atmel AT91"
  222. select GENERIC_GPIO
  223. select ARCH_REQUIRE_GPIOLIB
  224. select HAVE_CLK
  225. help
  226. This enables support for systems based on the Atmel AT91RM9200,
  227. AT91SAM9 and AT91CAP9 processors.
  228. config ARCH_BCMRING
  229. bool "Broadcom BCMRING"
  230. depends on MMU
  231. select CPU_V6
  232. select ARM_AMBA
  233. select COMMON_CLKDEV
  234. select GENERIC_TIME
  235. select GENERIC_CLOCKEVENTS
  236. select ARCH_WANT_OPTIONAL_GPIOLIB
  237. help
  238. Support for Broadcom's BCMRing platform.
  239. config ARCH_CLPS711X
  240. bool "Cirrus Logic CLPS711x/EP721x-based"
  241. select CPU_ARM720T
  242. help
  243. Support for Cirrus Logic 711x/721x based boards.
  244. config ARCH_GEMINI
  245. bool "Cortina Systems Gemini"
  246. select CPU_FA526
  247. select GENERIC_GPIO
  248. select ARCH_REQUIRE_GPIOLIB
  249. help
  250. Support for the Cortina Systems Gemini family SoCs
  251. config ARCH_EBSA110
  252. bool "EBSA-110"
  253. select CPU_SA110
  254. select ISA
  255. select NO_IOPORT
  256. help
  257. This is an evaluation board for the StrongARM processor available
  258. from Digital. It has limited hardware on-board, including an
  259. Ethernet interface, two PCMCIA sockets, two serial ports and a
  260. parallel port.
  261. config ARCH_EP93XX
  262. bool "EP93xx-based"
  263. select CPU_ARM920T
  264. select ARM_AMBA
  265. select ARM_VIC
  266. select GENERIC_GPIO
  267. select HAVE_CLK
  268. select COMMON_CLKDEV
  269. select ARCH_REQUIRE_GPIOLIB
  270. select ARCH_HAS_HOLES_MEMORYMODEL
  271. help
  272. This enables support for the Cirrus EP93xx series of CPUs.
  273. config ARCH_FOOTBRIDGE
  274. bool "FootBridge"
  275. select CPU_SA110
  276. select FOOTBRIDGE
  277. help
  278. Support for systems based on the DC21285 companion chip
  279. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  280. config ARCH_MXC
  281. bool "Freescale MXC/iMX-based"
  282. select GENERIC_TIME
  283. select GENERIC_CLOCKEVENTS
  284. select ARCH_REQUIRE_GPIOLIB
  285. select HAVE_CLK
  286. select COMMON_CLKDEV
  287. help
  288. Support for Freescale MXC/iMX-based family of processors
  289. config ARCH_STMP3XXX
  290. bool "Freescale STMP3xxx"
  291. select CPU_ARM926T
  292. select HAVE_CLK
  293. select COMMON_CLKDEV
  294. select ARCH_REQUIRE_GPIOLIB
  295. select GENERIC_TIME
  296. select GENERIC_CLOCKEVENTS
  297. select GENERIC_GPIO
  298. select USB_ARCH_HAS_EHCI
  299. help
  300. Support for systems based on the Freescale 3xxx CPUs.
  301. config ARCH_NETX
  302. bool "Hilscher NetX based"
  303. select CPU_ARM926T
  304. select ARM_VIC
  305. select GENERIC_CLOCKEVENTS
  306. select GENERIC_TIME
  307. help
  308. This enables support for systems based on the Hilscher NetX Soc
  309. config ARCH_H720X
  310. bool "Hynix HMS720x-based"
  311. select CPU_ARM720T
  312. select ISA_DMA_API
  313. help
  314. This enables support for systems based on the Hynix HMS720x
  315. config ARCH_IOP13XX
  316. bool "IOP13xx-based"
  317. depends on MMU
  318. select CPU_XSC3
  319. select PLAT_IOP
  320. select PCI
  321. select ARCH_SUPPORTS_MSI
  322. select VMSPLIT_1G
  323. help
  324. Support for Intel's IOP13XX (XScale) family of processors.
  325. config ARCH_IOP32X
  326. bool "IOP32x-based"
  327. depends on MMU
  328. select CPU_XSCALE
  329. select PLAT_IOP
  330. select PCI
  331. select GENERIC_GPIO
  332. select ARCH_REQUIRE_GPIOLIB
  333. help
  334. Support for Intel's 80219 and IOP32X (XScale) family of
  335. processors.
  336. config ARCH_IOP33X
  337. bool "IOP33x-based"
  338. depends on MMU
  339. select CPU_XSCALE
  340. select PLAT_IOP
  341. select PCI
  342. select GENERIC_GPIO
  343. select ARCH_REQUIRE_GPIOLIB
  344. help
  345. Support for Intel's IOP33X (XScale) family of processors.
  346. config ARCH_IXP23XX
  347. bool "IXP23XX-based"
  348. depends on MMU
  349. select CPU_XSC3
  350. select PCI
  351. help
  352. Support for Intel's IXP23xx (XScale) family of processors.
  353. config ARCH_IXP2000
  354. bool "IXP2400/2800-based"
  355. depends on MMU
  356. select CPU_XSCALE
  357. select PCI
  358. help
  359. Support for Intel's IXP2400/2800 (XScale) family of processors.
  360. config ARCH_IXP4XX
  361. bool "IXP4xx-based"
  362. depends on MMU
  363. select CPU_XSCALE
  364. select GENERIC_GPIO
  365. select GENERIC_TIME
  366. select GENERIC_CLOCKEVENTS
  367. select DMABOUNCE if PCI
  368. help
  369. Support for Intel's IXP4XX (XScale) family of processors.
  370. config ARCH_L7200
  371. bool "LinkUp-L7200"
  372. select CPU_ARM720T
  373. select FIQ
  374. help
  375. Say Y here if you intend to run this kernel on a LinkUp Systems
  376. L7200 Software Development Board which uses an ARM720T processor.
  377. Information on this board can be obtained at:
  378. <http://www.linkupsys.com/>
  379. If you have any questions or comments about the Linux kernel port
  380. to this board, send e-mail to <sjhill@cotw.com>.
  381. config ARCH_DOVE
  382. bool "Marvell Dove"
  383. select PCI
  384. select GENERIC_GPIO
  385. select ARCH_REQUIRE_GPIOLIB
  386. select GENERIC_TIME
  387. select GENERIC_CLOCKEVENTS
  388. select PLAT_ORION
  389. help
  390. Support for the Marvell Dove SoC 88AP510
  391. config ARCH_KIRKWOOD
  392. bool "Marvell Kirkwood"
  393. select CPU_FEROCEON
  394. select PCI
  395. select GENERIC_GPIO
  396. select ARCH_REQUIRE_GPIOLIB
  397. select GENERIC_TIME
  398. select GENERIC_CLOCKEVENTS
  399. select PLAT_ORION
  400. help
  401. Support for the following Marvell Kirkwood series SoCs:
  402. 88F6180, 88F6192 and 88F6281.
  403. config ARCH_LOKI
  404. bool "Marvell Loki (88RC8480)"
  405. select CPU_FEROCEON
  406. select GENERIC_TIME
  407. select GENERIC_CLOCKEVENTS
  408. select PLAT_ORION
  409. help
  410. Support for the Marvell Loki (88RC8480) SoC.
  411. config ARCH_MV78XX0
  412. bool "Marvell MV78xx0"
  413. select CPU_FEROCEON
  414. select PCI
  415. select GENERIC_GPIO
  416. select ARCH_REQUIRE_GPIOLIB
  417. select GENERIC_TIME
  418. select GENERIC_CLOCKEVENTS
  419. select PLAT_ORION
  420. help
  421. Support for the following Marvell MV78xx0 series SoCs:
  422. MV781x0, MV782x0.
  423. config ARCH_ORION5X
  424. bool "Marvell Orion"
  425. depends on MMU
  426. select CPU_FEROCEON
  427. select PCI
  428. select GENERIC_GPIO
  429. select ARCH_REQUIRE_GPIOLIB
  430. select GENERIC_TIME
  431. select GENERIC_CLOCKEVENTS
  432. select PLAT_ORION
  433. help
  434. Support for the following Marvell Orion 5x series SoCs:
  435. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  436. Orion-2 (5281), Orion-1-90 (6183).
  437. config ARCH_MMP
  438. bool "Marvell PXA168/910/MMP2"
  439. depends on MMU
  440. select GENERIC_GPIO
  441. select ARCH_REQUIRE_GPIOLIB
  442. select HAVE_CLK
  443. select COMMON_CLKDEV
  444. select GENERIC_TIME
  445. select GENERIC_CLOCKEVENTS
  446. select TICK_ONESHOT
  447. select PLAT_PXA
  448. help
  449. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  450. config ARCH_KS8695
  451. bool "Micrel/Kendin KS8695"
  452. select CPU_ARM922T
  453. select GENERIC_GPIO
  454. select ARCH_REQUIRE_GPIOLIB
  455. help
  456. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  457. System-on-Chip devices.
  458. config ARCH_NS9XXX
  459. bool "NetSilicon NS9xxx"
  460. select CPU_ARM926T
  461. select GENERIC_GPIO
  462. select GENERIC_TIME
  463. select GENERIC_CLOCKEVENTS
  464. select HAVE_CLK
  465. help
  466. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  467. System.
  468. <http://www.digi.com/products/microprocessors/index.jsp>
  469. config ARCH_W90X900
  470. bool "Nuvoton W90X900 CPU"
  471. select CPU_ARM926T
  472. select ARCH_REQUIRE_GPIOLIB
  473. select GENERIC_GPIO
  474. select HAVE_CLK
  475. select COMMON_CLKDEV
  476. select GENERIC_TIME
  477. select GENERIC_CLOCKEVENTS
  478. help
  479. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  480. At present, the w90x900 has been renamed nuc900, regarding
  481. the ARM series product line, you can login the following
  482. link address to know more.
  483. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  484. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  485. config ARCH_NUC93X
  486. bool "Nuvoton NUC93X CPU"
  487. select CPU_ARM926T
  488. select HAVE_CLK
  489. select COMMON_CLKDEV
  490. help
  491. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  492. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  493. config ARCH_PNX4008
  494. bool "Philips Nexperia PNX4008 Mobile"
  495. select CPU_ARM926T
  496. select HAVE_CLK
  497. select COMMON_CLKDEV
  498. help
  499. This enables support for Philips PNX4008 mobile platform.
  500. config ARCH_PXA
  501. bool "PXA2xx/PXA3xx-based"
  502. depends on MMU
  503. select ARCH_MTD_XIP
  504. select ARCH_HAS_CPUFREQ
  505. select GENERIC_GPIO
  506. select HAVE_CLK
  507. select COMMON_CLKDEV
  508. select ARCH_REQUIRE_GPIOLIB
  509. select GENERIC_TIME
  510. select GENERIC_CLOCKEVENTS
  511. select TICK_ONESHOT
  512. select PLAT_PXA
  513. help
  514. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  515. config ARCH_MSM
  516. bool "Qualcomm MSM"
  517. select CPU_V6
  518. select GENERIC_TIME
  519. select GENERIC_CLOCKEVENTS
  520. help
  521. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  522. apps processor of the MSM7K and depends on a shared memory
  523. interface to the ARM9 modem processor which runs the baseband stack
  524. and controls some vital subsystems (clock and power control, etc).
  525. config ARCH_SHMOBILE
  526. bool "Renesas SH-Mobile"
  527. help
  528. Support for Renesas's SH-Mobile ARM platforms
  529. config ARCH_RPC
  530. bool "RiscPC"
  531. select ARCH_ACORN
  532. select FIQ
  533. select TIMER_ACORN
  534. select ARCH_MAY_HAVE_PC_FDC
  535. select HAVE_PATA_PLATFORM
  536. select ISA_DMA_API
  537. select NO_IOPORT
  538. select ARCH_SPARSEMEM_ENABLE
  539. help
  540. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  541. CD-ROM interface, serial and parallel port, and the floppy drive.
  542. config ARCH_SA1100
  543. bool "SA1100-based"
  544. select CPU_SA1100
  545. select ISA
  546. select ARCH_SPARSEMEM_ENABLE
  547. select ARCH_MTD_XIP
  548. select ARCH_HAS_CPUFREQ
  549. select CPU_FREQ
  550. select GENERIC_GPIO
  551. select GENERIC_TIME
  552. select GENERIC_CLOCKEVENTS
  553. select HAVE_CLK
  554. select TICK_ONESHOT
  555. select ARCH_REQUIRE_GPIOLIB
  556. help
  557. Support for StrongARM 11x0 based boards.
  558. config ARCH_S3C2410
  559. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  560. select GENERIC_GPIO
  561. select ARCH_HAS_CPUFREQ
  562. select HAVE_CLK
  563. help
  564. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  565. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  566. the Samsung SMDK2410 development board (and derivatives).
  567. config ARCH_S3C64XX
  568. bool "Samsung S3C64XX"
  569. select PLAT_SAMSUNG
  570. select CPU_V6
  571. select GENERIC_GPIO
  572. select ARM_VIC
  573. select HAVE_CLK
  574. select NO_IOPORT
  575. select ARCH_HAS_CPUFREQ
  576. select ARCH_REQUIRE_GPIOLIB
  577. select SAMSUNG_CLKSRC
  578. select SAMSUNG_IRQ_VIC_TIMER
  579. select SAMSUNG_IRQ_UART
  580. select S3C_GPIO_TRACK
  581. select S3C_GPIO_PULL_UPDOWN
  582. select S3C_GPIO_CFG_S3C24XX
  583. select S3C_GPIO_CFG_S3C64XX
  584. select S3C_DEV_NAND
  585. select USB_ARCH_HAS_OHCI
  586. select SAMSUNG_GPIOLIB_4BIT
  587. help
  588. Samsung S3C64XX series based systems
  589. config ARCH_S5P6440
  590. bool "Samsung S5P6440"
  591. select CPU_V6
  592. select GENERIC_GPIO
  593. select HAVE_CLK
  594. help
  595. Samsung S5P6440 CPU based systems
  596. config ARCH_S5P6442
  597. bool "Samsung S5P6442"
  598. select CPU_V6
  599. select GENERIC_GPIO
  600. select HAVE_CLK
  601. help
  602. Samsung S5P6442 CPU based systems
  603. config ARCH_S5PC1XX
  604. bool "Samsung S5PC1XX"
  605. select GENERIC_GPIO
  606. select HAVE_CLK
  607. select CPU_V7
  608. select ARM_L1_CACHE_SHIFT_6
  609. help
  610. Samsung S5PC1XX series based systems
  611. config ARCH_S5PV210
  612. bool "Samsung S5PV210/S5PC110"
  613. select CPU_V7
  614. select GENERIC_GPIO
  615. select HAVE_CLK
  616. select ARM_L1_CACHE_SHIFT_6
  617. help
  618. Samsung S5PV210/S5PC110 series based systems
  619. config ARCH_SHARK
  620. bool "Shark"
  621. select CPU_SA110
  622. select ISA
  623. select ISA_DMA
  624. select ZONE_DMA
  625. select PCI
  626. help
  627. Support for the StrongARM based Digital DNARD machine, also known
  628. as "Shark" (<http://www.shark-linux.de/shark.html>).
  629. config ARCH_LH7A40X
  630. bool "Sharp LH7A40X"
  631. select CPU_ARM922T
  632. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  633. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  634. help
  635. Say Y here for systems based on one of the Sharp LH7A40X
  636. System on a Chip processors. These CPUs include an ARM922T
  637. core with a wide array of integrated devices for
  638. hand-held and low-power applications.
  639. config ARCH_U300
  640. bool "ST-Ericsson U300 Series"
  641. depends on MMU
  642. select CPU_ARM926T
  643. select HAVE_TCM
  644. select ARM_AMBA
  645. select ARM_VIC
  646. select GENERIC_TIME
  647. select GENERIC_CLOCKEVENTS
  648. select HAVE_CLK
  649. select COMMON_CLKDEV
  650. select GENERIC_GPIO
  651. help
  652. Support for ST-Ericsson U300 series mobile platforms.
  653. config ARCH_U8500
  654. bool "ST-Ericsson U8500 Series"
  655. select CPU_V7
  656. select ARM_AMBA
  657. select GENERIC_TIME
  658. select GENERIC_CLOCKEVENTS
  659. select COMMON_CLKDEV
  660. help
  661. Support for ST-Ericsson's Ux500 architecture
  662. config ARCH_NOMADIK
  663. bool "STMicroelectronics Nomadik"
  664. select ARM_AMBA
  665. select ARM_VIC
  666. select CPU_ARM926T
  667. select HAVE_CLK
  668. select COMMON_CLKDEV
  669. select GENERIC_TIME
  670. select GENERIC_CLOCKEVENTS
  671. select GENERIC_GPIO
  672. select ARCH_REQUIRE_GPIOLIB
  673. help
  674. Support for the Nomadik platform by ST-Ericsson
  675. config ARCH_DAVINCI
  676. bool "TI DaVinci"
  677. select CPU_ARM926T
  678. select GENERIC_TIME
  679. select GENERIC_CLOCKEVENTS
  680. select GENERIC_GPIO
  681. select ARCH_REQUIRE_GPIOLIB
  682. select HAVE_CLK
  683. select ZONE_DMA
  684. select HAVE_IDE
  685. select COMMON_CLKDEV
  686. select GENERIC_ALLOCATOR
  687. select ARCH_HAS_HOLES_MEMORYMODEL
  688. help
  689. Support for TI's DaVinci platform.
  690. config ARCH_OMAP
  691. bool "TI OMAP"
  692. select GENERIC_GPIO
  693. select HAVE_CLK
  694. select ARCH_REQUIRE_GPIOLIB
  695. select ARCH_HAS_CPUFREQ
  696. select GENERIC_TIME
  697. select GENERIC_CLOCKEVENTS
  698. select ARCH_HAS_HOLES_MEMORYMODEL
  699. help
  700. Support for TI's OMAP platform (OMAP1 and OMAP2).
  701. endchoice
  702. #
  703. # This is sorted alphabetically by mach-* pathname. However, plat-*
  704. # Kconfigs may be included either alphabetically (according to the
  705. # plat- suffix) or along side the corresponding mach-* source.
  706. #
  707. source "arch/arm/mach-aaec2000/Kconfig"
  708. source "arch/arm/mach-at91/Kconfig"
  709. source "arch/arm/mach-bcmring/Kconfig"
  710. source "arch/arm/mach-clps711x/Kconfig"
  711. source "arch/arm/mach-davinci/Kconfig"
  712. source "arch/arm/mach-dove/Kconfig"
  713. source "arch/arm/mach-ep93xx/Kconfig"
  714. source "arch/arm/mach-footbridge/Kconfig"
  715. source "arch/arm/mach-gemini/Kconfig"
  716. source "arch/arm/mach-h720x/Kconfig"
  717. source "arch/arm/mach-integrator/Kconfig"
  718. source "arch/arm/mach-iop32x/Kconfig"
  719. source "arch/arm/mach-iop33x/Kconfig"
  720. source "arch/arm/mach-iop13xx/Kconfig"
  721. source "arch/arm/mach-ixp4xx/Kconfig"
  722. source "arch/arm/mach-ixp2000/Kconfig"
  723. source "arch/arm/mach-ixp23xx/Kconfig"
  724. source "arch/arm/mach-kirkwood/Kconfig"
  725. source "arch/arm/mach-ks8695/Kconfig"
  726. source "arch/arm/mach-lh7a40x/Kconfig"
  727. source "arch/arm/mach-loki/Kconfig"
  728. source "arch/arm/mach-msm/Kconfig"
  729. source "arch/arm/mach-mv78xx0/Kconfig"
  730. source "arch/arm/plat-mxc/Kconfig"
  731. source "arch/arm/mach-netx/Kconfig"
  732. source "arch/arm/mach-nomadik/Kconfig"
  733. source "arch/arm/plat-nomadik/Kconfig"
  734. source "arch/arm/mach-ns9xxx/Kconfig"
  735. source "arch/arm/mach-nuc93x/Kconfig"
  736. source "arch/arm/plat-omap/Kconfig"
  737. source "arch/arm/mach-omap1/Kconfig"
  738. source "arch/arm/mach-omap2/Kconfig"
  739. source "arch/arm/mach-orion5x/Kconfig"
  740. source "arch/arm/mach-pxa/Kconfig"
  741. source "arch/arm/plat-pxa/Kconfig"
  742. source "arch/arm/mach-mmp/Kconfig"
  743. source "arch/arm/mach-realview/Kconfig"
  744. source "arch/arm/mach-sa1100/Kconfig"
  745. source "arch/arm/plat-samsung/Kconfig"
  746. source "arch/arm/plat-s3c24xx/Kconfig"
  747. source "arch/arm/plat-s5p/Kconfig"
  748. source "arch/arm/plat-s5pc1xx/Kconfig"
  749. if ARCH_S3C2410
  750. source "arch/arm/mach-s3c2400/Kconfig"
  751. source "arch/arm/mach-s3c2410/Kconfig"
  752. source "arch/arm/mach-s3c2412/Kconfig"
  753. source "arch/arm/mach-s3c2440/Kconfig"
  754. source "arch/arm/mach-s3c2443/Kconfig"
  755. endif
  756. if ARCH_S3C64XX
  757. source "arch/arm/mach-s3c64xx/Kconfig"
  758. endif
  759. source "arch/arm/mach-s5p6440/Kconfig"
  760. source "arch/arm/mach-s5p6442/Kconfig"
  761. if ARCH_S5PC1XX
  762. source "arch/arm/mach-s5pc100/Kconfig"
  763. endif
  764. source "arch/arm/mach-s5pv210/Kconfig"
  765. source "arch/arm/mach-shmobile/Kconfig"
  766. source "arch/arm/plat-stmp3xxx/Kconfig"
  767. source "arch/arm/mach-u300/Kconfig"
  768. source "arch/arm/mach-ux500/Kconfig"
  769. source "arch/arm/mach-versatile/Kconfig"
  770. source "arch/arm/mach-w90x900/Kconfig"
  771. # Definitions to make life easier
  772. config ARCH_ACORN
  773. bool
  774. config PLAT_IOP
  775. bool
  776. select GENERIC_CLOCKEVENTS
  777. select GENERIC_TIME
  778. config PLAT_ORION
  779. bool
  780. config PLAT_PXA
  781. bool
  782. config PLAT_VERSATILE
  783. bool
  784. source arch/arm/mm/Kconfig
  785. config IWMMXT
  786. bool "Enable iWMMXt support"
  787. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  788. default y if PXA27x || PXA3xx || ARCH_MMP
  789. help
  790. Enable support for iWMMXt context switching at run time if
  791. running on a CPU that supports it.
  792. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  793. config XSCALE_PMU
  794. bool
  795. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  796. default y
  797. config CPU_HAS_PMU
  798. depends on CPU_V6 || CPU_V7 || XSCALE_PMU
  799. default y
  800. bool
  801. if !MMU
  802. source "arch/arm/Kconfig-nommu"
  803. endif
  804. config ARM_ERRATA_411920
  805. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  806. depends on CPU_V6 && !SMP
  807. help
  808. Invalidation of the Instruction Cache operation can
  809. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  810. It does not affect the MPCore. This option enables the ARM Ltd.
  811. recommended workaround.
  812. config ARM_ERRATA_430973
  813. bool "ARM errata: Stale prediction on replaced interworking branch"
  814. depends on CPU_V7
  815. help
  816. This option enables the workaround for the 430973 Cortex-A8
  817. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  818. interworking branch is replaced with another code sequence at the
  819. same virtual address, whether due to self-modifying code or virtual
  820. to physical address re-mapping, Cortex-A8 does not recover from the
  821. stale interworking branch prediction. This results in Cortex-A8
  822. executing the new code sequence in the incorrect ARM or Thumb state.
  823. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  824. and also flushes the branch target cache at every context switch.
  825. Note that setting specific bits in the ACTLR register may not be
  826. available in non-secure mode.
  827. config ARM_ERRATA_458693
  828. bool "ARM errata: Processor deadlock when a false hazard is created"
  829. depends on CPU_V7
  830. help
  831. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  832. erratum. For very specific sequences of memory operations, it is
  833. possible for a hazard condition intended for a cache line to instead
  834. be incorrectly associated with a different cache line. This false
  835. hazard might then cause a processor deadlock. The workaround enables
  836. the L1 caching of the NEON accesses and disables the PLD instruction
  837. in the ACTLR register. Note that setting specific bits in the ACTLR
  838. register may not be available in non-secure mode.
  839. config ARM_ERRATA_460075
  840. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  841. depends on CPU_V7
  842. help
  843. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  844. erratum. Any asynchronous access to the L2 cache may encounter a
  845. situation in which recent store transactions to the L2 cache are lost
  846. and overwritten with stale memory contents from external memory. The
  847. workaround disables the write-allocate mode for the L2 cache via the
  848. ACTLR register. Note that setting specific bits in the ACTLR register
  849. may not be available in non-secure mode.
  850. config PL310_ERRATA_588369
  851. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  852. depends on CACHE_L2X0 && ARCH_OMAP4
  853. help
  854. The PL310 L2 cache controller implements three types of Clean &
  855. Invalidate maintenance operations: by Physical Address
  856. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  857. They are architecturally defined to behave as the execution of a
  858. clean operation followed immediately by an invalidate operation,
  859. both performing to the same memory location. This functionality
  860. is not correctly implemented in PL310 as clean lines are not
  861. invalidated as a result of these operations. Note that this errata
  862. uses Texas Instrument's secure monitor api.
  863. endmenu
  864. source "arch/arm/common/Kconfig"
  865. config FORCE_MAX_ZONEORDER
  866. int
  867. depends on SA1111
  868. default "9"
  869. menu "Bus support"
  870. config ARM_AMBA
  871. bool
  872. config ISA
  873. bool
  874. help
  875. Find out whether you have ISA slots on your motherboard. ISA is the
  876. name of a bus system, i.e. the way the CPU talks to the other stuff
  877. inside your box. Other bus systems are PCI, EISA, MicroChannel
  878. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  879. newer boards don't support it. If you have ISA, say Y, otherwise N.
  880. # Select ISA DMA controller support
  881. config ISA_DMA
  882. bool
  883. select ISA_DMA_API
  884. # Select ISA DMA interface
  885. config ISA_DMA_API
  886. bool
  887. config PCI
  888. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  889. help
  890. Find out whether you have a PCI motherboard. PCI is the name of a
  891. bus system, i.e. the way the CPU talks to the other stuff inside
  892. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  893. VESA. If you have PCI, say Y, otherwise N.
  894. config PCI_SYSCALL
  895. def_bool PCI
  896. # Select the host bridge type
  897. config PCI_HOST_VIA82C505
  898. bool
  899. depends on PCI && ARCH_SHARK
  900. default y
  901. config PCI_HOST_ITE8152
  902. bool
  903. depends on PCI && MACH_ARMCORE
  904. default y
  905. select DMABOUNCE
  906. source "drivers/pci/Kconfig"
  907. source "drivers/pcmcia/Kconfig"
  908. endmenu
  909. menu "Kernel Features"
  910. source "kernel/time/Kconfig"
  911. config SMP
  912. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  913. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  914. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  915. depends on GENERIC_CLOCKEVENTS
  916. select USE_GENERIC_SMP_HELPERS
  917. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  918. help
  919. This enables support for systems with more than one CPU. If you have
  920. a system with only one CPU, like most personal computers, say N. If
  921. you have a system with more than one CPU, say Y.
  922. If you say N here, the kernel will run on single and multiprocessor
  923. machines, but will use only one CPU of a multiprocessor machine. If
  924. you say Y here, the kernel will run on many, but not all, single
  925. processor machines. On a single processor machine, the kernel will
  926. run faster if you say N here.
  927. See also <file:Documentation/i386/IO-APIC.txt>,
  928. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  929. <http://www.linuxdoc.org/docs.html#howto>.
  930. If you don't know what to do here, say N.
  931. config HAVE_ARM_SCU
  932. bool
  933. depends on SMP
  934. help
  935. This option enables support for the ARM system coherency unit
  936. config HAVE_ARM_TWD
  937. bool
  938. depends on SMP
  939. help
  940. This options enables support for the ARM timer and watchdog unit
  941. choice
  942. prompt "Memory split"
  943. default VMSPLIT_3G
  944. help
  945. Select the desired split between kernel and user memory.
  946. If you are not absolutely sure what you are doing, leave this
  947. option alone!
  948. config VMSPLIT_3G
  949. bool "3G/1G user/kernel split"
  950. config VMSPLIT_2G
  951. bool "2G/2G user/kernel split"
  952. config VMSPLIT_1G
  953. bool "1G/3G user/kernel split"
  954. endchoice
  955. config PAGE_OFFSET
  956. hex
  957. default 0x40000000 if VMSPLIT_1G
  958. default 0x80000000 if VMSPLIT_2G
  959. default 0xC0000000
  960. config NR_CPUS
  961. int "Maximum number of CPUs (2-32)"
  962. range 2 32
  963. depends on SMP
  964. default "4"
  965. config HOTPLUG_CPU
  966. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  967. depends on SMP && HOTPLUG && EXPERIMENTAL
  968. help
  969. Say Y here to experiment with turning CPUs off and on. CPUs
  970. can be controlled through /sys/devices/system/cpu.
  971. config LOCAL_TIMERS
  972. bool "Use local timer interrupts"
  973. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  974. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  975. default y
  976. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  977. help
  978. Enable support for local timers on SMP platforms, rather then the
  979. legacy IPI broadcast method. Local timers allows the system
  980. accounting to be spread across the timer interval, preventing a
  981. "thundering herd" at every timer tick.
  982. source kernel/Kconfig.preempt
  983. config HZ
  984. int
  985. default 128 if ARCH_L7200
  986. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
  987. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  988. default AT91_TIMER_HZ if ARCH_AT91
  989. default 100
  990. config THUMB2_KERNEL
  991. bool "Compile the kernel in Thumb-2 mode"
  992. depends on CPU_V7 && EXPERIMENTAL
  993. select AEABI
  994. select ARM_ASM_UNIFIED
  995. help
  996. By enabling this option, the kernel will be compiled in
  997. Thumb-2 mode. A compiler/assembler that understand the unified
  998. ARM-Thumb syntax is needed.
  999. If unsure, say N.
  1000. config ARM_ASM_UNIFIED
  1001. bool
  1002. config AEABI
  1003. bool "Use the ARM EABI to compile the kernel"
  1004. help
  1005. This option allows for the kernel to be compiled using the latest
  1006. ARM ABI (aka EABI). This is only useful if you are using a user
  1007. space environment that is also compiled with EABI.
  1008. Since there are major incompatibilities between the legacy ABI and
  1009. EABI, especially with regard to structure member alignment, this
  1010. option also changes the kernel syscall calling convention to
  1011. disambiguate both ABIs and allow for backward compatibility support
  1012. (selected with CONFIG_OABI_COMPAT).
  1013. To use this you need GCC version 4.0.0 or later.
  1014. config OABI_COMPAT
  1015. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1016. depends on AEABI && EXPERIMENTAL
  1017. default y
  1018. help
  1019. This option preserves the old syscall interface along with the
  1020. new (ARM EABI) one. It also provides a compatibility layer to
  1021. intercept syscalls that have structure arguments which layout
  1022. in memory differs between the legacy ABI and the new ARM EABI
  1023. (only for non "thumb" binaries). This option adds a tiny
  1024. overhead to all syscalls and produces a slightly larger kernel.
  1025. If you know you'll be using only pure EABI user space then you
  1026. can say N here. If this option is not selected and you attempt
  1027. to execute a legacy ABI binary then the result will be
  1028. UNPREDICTABLE (in fact it can be predicted that it won't work
  1029. at all). If in doubt say Y.
  1030. config ARCH_HAS_HOLES_MEMORYMODEL
  1031. bool
  1032. # Discontigmem is deprecated
  1033. config ARCH_DISCONTIGMEM_ENABLE
  1034. bool
  1035. config ARCH_SPARSEMEM_ENABLE
  1036. bool
  1037. config ARCH_SPARSEMEM_DEFAULT
  1038. def_bool ARCH_SPARSEMEM_ENABLE
  1039. config ARCH_SELECT_MEMORY_MODEL
  1040. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  1041. config NODES_SHIFT
  1042. int
  1043. default "4" if ARCH_LH7A40X
  1044. default "2"
  1045. depends on NEED_MULTIPLE_NODES
  1046. config HIGHMEM
  1047. bool "High Memory Support (EXPERIMENTAL)"
  1048. depends on MMU && EXPERIMENTAL
  1049. help
  1050. The address space of ARM processors is only 4 Gigabytes large
  1051. and it has to accommodate user address space, kernel address
  1052. space as well as some memory mapped IO. That means that, if you
  1053. have a large amount of physical memory and/or IO, not all of the
  1054. memory can be "permanently mapped" by the kernel. The physical
  1055. memory that is not permanently mapped is called "high memory".
  1056. Depending on the selected kernel/user memory split, minimum
  1057. vmalloc space and actual amount of RAM, you may not need this
  1058. option which should result in a slightly faster kernel.
  1059. If unsure, say n.
  1060. config HIGHPTE
  1061. bool "Allocate 2nd-level pagetables from highmem"
  1062. depends on HIGHMEM
  1063. depends on !OUTER_CACHE
  1064. config HW_PERF_EVENTS
  1065. bool "Enable hardware performance counter support for perf events"
  1066. depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
  1067. default y
  1068. help
  1069. Enable hardware performance counter support for perf events. If
  1070. disabled, perf events will use software events only.
  1071. source "mm/Kconfig"
  1072. config LEDS
  1073. bool "Timer and CPU usage LEDs"
  1074. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1075. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1076. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1077. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1078. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1079. ARCH_AT91 || ARCH_DAVINCI || \
  1080. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1081. help
  1082. If you say Y here, the LEDs on your machine will be used
  1083. to provide useful information about your current system status.
  1084. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1085. be able to select which LEDs are active using the options below. If
  1086. you are compiling a kernel for the EBSA-110 or the LART however, the
  1087. red LED will simply flash regularly to indicate that the system is
  1088. still functional. It is safe to say Y here if you have a CATS
  1089. system, but the driver will do nothing.
  1090. config LEDS_TIMER
  1091. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1092. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1093. || MACH_OMAP_PERSEUS2
  1094. depends on LEDS
  1095. depends on !GENERIC_CLOCKEVENTS
  1096. default y if ARCH_EBSA110
  1097. help
  1098. If you say Y here, one of the system LEDs (the green one on the
  1099. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1100. will flash regularly to indicate that the system is still
  1101. operational. This is mainly useful to kernel hackers who are
  1102. debugging unstable kernels.
  1103. The LART uses the same LED for both Timer LED and CPU usage LED
  1104. functions. You may choose to use both, but the Timer LED function
  1105. will overrule the CPU usage LED.
  1106. config LEDS_CPU
  1107. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1108. !ARCH_OMAP) \
  1109. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1110. || MACH_OMAP_PERSEUS2
  1111. depends on LEDS
  1112. help
  1113. If you say Y here, the red LED will be used to give a good real
  1114. time indication of CPU usage, by lighting whenever the idle task
  1115. is not currently executing.
  1116. The LART uses the same LED for both Timer LED and CPU usage LED
  1117. functions. You may choose to use both, but the Timer LED function
  1118. will overrule the CPU usage LED.
  1119. config ALIGNMENT_TRAP
  1120. bool
  1121. depends on CPU_CP15_MMU
  1122. default y if !ARCH_EBSA110
  1123. select HAVE_PROC_CPU if PROC_FS
  1124. help
  1125. ARM processors cannot fetch/store information which is not
  1126. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1127. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1128. fetch/store instructions will be emulated in software if you say
  1129. here, which has a severe performance impact. This is necessary for
  1130. correct operation of some network protocols. With an IP-only
  1131. configuration it is safe to say N, otherwise say Y.
  1132. config UACCESS_WITH_MEMCPY
  1133. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1134. depends on MMU && EXPERIMENTAL
  1135. default y if CPU_FEROCEON
  1136. help
  1137. Implement faster copy_to_user and clear_user methods for CPU
  1138. cores where a 8-word STM instruction give significantly higher
  1139. memory write throughput than a sequence of individual 32bit stores.
  1140. A possible side effect is a slight increase in scheduling latency
  1141. between threads sharing the same address space if they invoke
  1142. such copy operations with large buffers.
  1143. However, if the CPU data cache is using a write-allocate mode,
  1144. this option is unlikely to provide any performance gain.
  1145. endmenu
  1146. menu "Boot options"
  1147. # Compressed boot loader in ROM. Yes, we really want to ask about
  1148. # TEXT and BSS so we preserve their values in the config files.
  1149. config ZBOOT_ROM_TEXT
  1150. hex "Compressed ROM boot loader base address"
  1151. default "0"
  1152. help
  1153. The physical address at which the ROM-able zImage is to be
  1154. placed in the target. Platforms which normally make use of
  1155. ROM-able zImage formats normally set this to a suitable
  1156. value in their defconfig file.
  1157. If ZBOOT_ROM is not enabled, this has no effect.
  1158. config ZBOOT_ROM_BSS
  1159. hex "Compressed ROM boot loader BSS address"
  1160. default "0"
  1161. help
  1162. The base address of an area of read/write memory in the target
  1163. for the ROM-able zImage which must be available while the
  1164. decompressor is running. It must be large enough to hold the
  1165. entire decompressed kernel plus an additional 128 KiB.
  1166. Platforms which normally make use of ROM-able zImage formats
  1167. normally set this to a suitable value in their defconfig file.
  1168. If ZBOOT_ROM is not enabled, this has no effect.
  1169. config ZBOOT_ROM
  1170. bool "Compressed boot loader in ROM/flash"
  1171. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1172. help
  1173. Say Y here if you intend to execute your compressed kernel image
  1174. (zImage) directly from ROM or flash. If unsure, say N.
  1175. config CMDLINE
  1176. string "Default kernel command string"
  1177. default ""
  1178. help
  1179. On some architectures (EBSA110 and CATS), there is currently no way
  1180. for the boot loader to pass arguments to the kernel. For these
  1181. architectures, you should supply some command-line options at build
  1182. time by entering them here. As a minimum, you should specify the
  1183. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1184. config XIP_KERNEL
  1185. bool "Kernel Execute-In-Place from ROM"
  1186. depends on !ZBOOT_ROM
  1187. help
  1188. Execute-In-Place allows the kernel to run from non-volatile storage
  1189. directly addressable by the CPU, such as NOR flash. This saves RAM
  1190. space since the text section of the kernel is not loaded from flash
  1191. to RAM. Read-write sections, such as the data section and stack,
  1192. are still copied to RAM. The XIP kernel is not compressed since
  1193. it has to run directly from flash, so it will take more space to
  1194. store it. The flash address used to link the kernel object files,
  1195. and for storing it, is configuration dependent. Therefore, if you
  1196. say Y here, you must know the proper physical address where to
  1197. store the kernel image depending on your own flash memory usage.
  1198. Also note that the make target becomes "make xipImage" rather than
  1199. "make zImage" or "make Image". The final kernel binary to put in
  1200. ROM memory will be arch/arm/boot/xipImage.
  1201. If unsure, say N.
  1202. config XIP_PHYS_ADDR
  1203. hex "XIP Kernel Physical Location"
  1204. depends on XIP_KERNEL
  1205. default "0x00080000"
  1206. help
  1207. This is the physical address in your flash memory the kernel will
  1208. be linked for and stored to. This address is dependent on your
  1209. own flash usage.
  1210. config KEXEC
  1211. bool "Kexec system call (EXPERIMENTAL)"
  1212. depends on EXPERIMENTAL
  1213. help
  1214. kexec is a system call that implements the ability to shutdown your
  1215. current kernel, and to start another kernel. It is like a reboot
  1216. but it is independent of the system firmware. And like a reboot
  1217. you can start any kernel with it, not just Linux.
  1218. It is an ongoing process to be certain the hardware in a machine
  1219. is properly shutdown, so do not be surprised if this code does not
  1220. initially work for you. It may help to enable device hotplugging
  1221. support.
  1222. config ATAGS_PROC
  1223. bool "Export atags in procfs"
  1224. depends on KEXEC
  1225. default y
  1226. help
  1227. Should the atags used to boot the kernel be exported in an "atags"
  1228. file in procfs. Useful with kexec.
  1229. endmenu
  1230. menu "CPU Power Management"
  1231. if ARCH_HAS_CPUFREQ
  1232. source "drivers/cpufreq/Kconfig"
  1233. config CPU_FREQ_SA1100
  1234. bool
  1235. config CPU_FREQ_SA1110
  1236. bool
  1237. config CPU_FREQ_INTEGRATOR
  1238. tristate "CPUfreq driver for ARM Integrator CPUs"
  1239. depends on ARCH_INTEGRATOR && CPU_FREQ
  1240. default y
  1241. help
  1242. This enables the CPUfreq driver for ARM Integrator CPUs.
  1243. For details, take a look at <file:Documentation/cpu-freq>.
  1244. If in doubt, say Y.
  1245. config CPU_FREQ_PXA
  1246. bool
  1247. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1248. default y
  1249. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1250. config CPU_FREQ_S3C64XX
  1251. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1252. depends on CPU_FREQ && CPU_S3C6410
  1253. config CPU_FREQ_S3C
  1254. bool
  1255. help
  1256. Internal configuration node for common cpufreq on Samsung SoC
  1257. config CPU_FREQ_S3C24XX
  1258. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1259. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1260. select CPU_FREQ_S3C
  1261. help
  1262. This enables the CPUfreq driver for the Samsung S3C24XX family
  1263. of CPUs.
  1264. For details, take a look at <file:Documentation/cpu-freq>.
  1265. If in doubt, say N.
  1266. config CPU_FREQ_S3C24XX_PLL
  1267. bool "Support CPUfreq changing of PLL frequency"
  1268. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1269. help
  1270. Compile in support for changing the PLL frequency from the
  1271. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1272. after a frequency change, so by default it is not enabled.
  1273. This also means that the PLL tables for the selected CPU(s) will
  1274. be built which may increase the size of the kernel image.
  1275. config CPU_FREQ_S3C24XX_DEBUG
  1276. bool "Debug CPUfreq Samsung driver core"
  1277. depends on CPU_FREQ_S3C24XX
  1278. help
  1279. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1280. config CPU_FREQ_S3C24XX_IODEBUG
  1281. bool "Debug CPUfreq Samsung driver IO timing"
  1282. depends on CPU_FREQ_S3C24XX
  1283. help
  1284. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1285. config CPU_FREQ_S3C24XX_DEBUGFS
  1286. bool "Export debugfs for CPUFreq"
  1287. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1288. help
  1289. Export status information via debugfs.
  1290. endif
  1291. source "drivers/cpuidle/Kconfig"
  1292. endmenu
  1293. menu "Floating point emulation"
  1294. comment "At least one emulation must be selected"
  1295. config FPE_NWFPE
  1296. bool "NWFPE math emulation"
  1297. depends on !AEABI || OABI_COMPAT
  1298. ---help---
  1299. Say Y to include the NWFPE floating point emulator in the kernel.
  1300. This is necessary to run most binaries. Linux does not currently
  1301. support floating point hardware so you need to say Y here even if
  1302. your machine has an FPA or floating point co-processor podule.
  1303. You may say N here if you are going to load the Acorn FPEmulator
  1304. early in the bootup.
  1305. config FPE_NWFPE_XP
  1306. bool "Support extended precision"
  1307. depends on FPE_NWFPE
  1308. help
  1309. Say Y to include 80-bit support in the kernel floating-point
  1310. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1311. Note that gcc does not generate 80-bit operations by default,
  1312. so in most cases this option only enlarges the size of the
  1313. floating point emulator without any good reason.
  1314. You almost surely want to say N here.
  1315. config FPE_FASTFPE
  1316. bool "FastFPE math emulation (EXPERIMENTAL)"
  1317. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1318. ---help---
  1319. Say Y here to include the FAST floating point emulator in the kernel.
  1320. This is an experimental much faster emulator which now also has full
  1321. precision for the mantissa. It does not support any exceptions.
  1322. It is very simple, and approximately 3-6 times faster than NWFPE.
  1323. It should be sufficient for most programs. It may be not suitable
  1324. for scientific calculations, but you have to check this for yourself.
  1325. If you do not feel you need a faster FP emulation you should better
  1326. choose NWFPE.
  1327. config VFP
  1328. bool "VFP-format floating point maths"
  1329. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1330. help
  1331. Say Y to include VFP support code in the kernel. This is needed
  1332. if your hardware includes a VFP unit.
  1333. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1334. release notes and additional status information.
  1335. Say N if your target does not have VFP hardware.
  1336. config VFPv3
  1337. bool
  1338. depends on VFP
  1339. default y if CPU_V7
  1340. config NEON
  1341. bool "Advanced SIMD (NEON) Extension support"
  1342. depends on VFPv3 && CPU_V7
  1343. help
  1344. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1345. Extension.
  1346. endmenu
  1347. menu "Userspace binary formats"
  1348. source "fs/Kconfig.binfmt"
  1349. config ARTHUR
  1350. tristate "RISC OS personality"
  1351. depends on !AEABI
  1352. help
  1353. Say Y here to include the kernel code necessary if you want to run
  1354. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1355. experimental; if this sounds frightening, say N and sleep in peace.
  1356. You can also say M here to compile this support as a module (which
  1357. will be called arthur).
  1358. endmenu
  1359. menu "Power management options"
  1360. source "kernel/power/Kconfig"
  1361. config ARCH_SUSPEND_POSSIBLE
  1362. def_bool y
  1363. endmenu
  1364. source "net/Kconfig"
  1365. source "drivers/Kconfig"
  1366. source "fs/Kconfig"
  1367. source "arch/arm/Kconfig.debug"
  1368. source "security/Kconfig"
  1369. source "crypto/Kconfig"
  1370. source "lib/Kconfig"