Kconfig 45 KB

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  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see Documentation/kbuild/kconfig-language.txt.
  4. #
  5. mainmenu "Linux Kernel Configuration"
  6. config ARM
  7. bool
  8. default y
  9. select HAVE_AOUT
  10. select HAVE_IDE
  11. select RTC_LIB
  12. select SYS_SUPPORTS_APM_EMULATION
  13. select GENERIC_ATOMIC64 if (!CPU_32v6K)
  14. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  15. select HAVE_ARCH_KGDB
  16. select HAVE_KPROBES if (!XIP_KERNEL)
  17. select HAVE_KRETPROBES if (HAVE_KPROBES)
  18. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  19. select HAVE_GENERIC_DMA_COHERENT
  20. select HAVE_KERNEL_GZIP
  21. select HAVE_KERNEL_LZO
  22. select HAVE_KERNEL_LZMA
  23. select HAVE_PERF_EVENTS
  24. select PERF_USE_VMALLOC
  25. help
  26. The ARM series is a line of low-power-consumption RISC chip designs
  27. licensed by ARM Ltd and targeted at embedded applications and
  28. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  29. manufactured, but legacy ARM-based PC hardware remains popular in
  30. Europe. There is an ARM Linux project with a web page at
  31. <http://www.arm.linux.org.uk/>.
  32. config HAVE_PWM
  33. bool
  34. config SYS_SUPPORTS_APM_EMULATION
  35. bool
  36. config GENERIC_GPIO
  37. bool
  38. config GENERIC_TIME
  39. bool
  40. default y
  41. config ARCH_USES_GETTIMEOFFSET
  42. bool
  43. default n
  44. config GENERIC_CLOCKEVENTS
  45. bool
  46. config GENERIC_CLOCKEVENTS_BROADCAST
  47. bool
  48. depends on GENERIC_CLOCKEVENTS
  49. default y if SMP && !LOCAL_TIMERS
  50. config HAVE_TCM
  51. bool
  52. select GENERIC_ALLOCATOR
  53. config HAVE_PROC_CPU
  54. bool
  55. config NO_IOPORT
  56. bool
  57. config EISA
  58. bool
  59. ---help---
  60. The Extended Industry Standard Architecture (EISA) bus was
  61. developed as an open alternative to the IBM MicroChannel bus.
  62. The EISA bus provided some of the features of the IBM MicroChannel
  63. bus while maintaining backward compatibility with cards made for
  64. the older ISA bus. The EISA bus saw limited use between 1988 and
  65. 1995 when it was made obsolete by the PCI bus.
  66. Say Y here if you are building a kernel for an EISA-based machine.
  67. Otherwise, say N.
  68. config SBUS
  69. bool
  70. config MCA
  71. bool
  72. help
  73. MicroChannel Architecture is found in some IBM PS/2 machines and
  74. laptops. It is a bus system similar to PCI or ISA. See
  75. <file:Documentation/mca.txt> (and especially the web page given
  76. there) before attempting to build an MCA bus kernel.
  77. config GENERIC_HARDIRQS
  78. bool
  79. default y
  80. config STACKTRACE_SUPPORT
  81. bool
  82. default y
  83. config HAVE_LATENCYTOP_SUPPORT
  84. bool
  85. depends on !SMP
  86. default y
  87. config LOCKDEP_SUPPORT
  88. bool
  89. default y
  90. config TRACE_IRQFLAGS_SUPPORT
  91. bool
  92. default y
  93. config HARDIRQS_SW_RESEND
  94. bool
  95. default y
  96. config GENERIC_IRQ_PROBE
  97. bool
  98. default y
  99. config GENERIC_LOCKBREAK
  100. bool
  101. default y
  102. depends on SMP && PREEMPT
  103. config RWSEM_GENERIC_SPINLOCK
  104. bool
  105. default y
  106. config RWSEM_XCHGADD_ALGORITHM
  107. bool
  108. config ARCH_HAS_ILOG2_U32
  109. bool
  110. config ARCH_HAS_ILOG2_U64
  111. bool
  112. config ARCH_HAS_CPUFREQ
  113. bool
  114. help
  115. Internal node to signify that the ARCH has CPUFREQ support
  116. and that the relevant menu configurations are displayed for
  117. it.
  118. config GENERIC_HWEIGHT
  119. bool
  120. default y
  121. config GENERIC_CALIBRATE_DELAY
  122. bool
  123. default y
  124. config ARCH_MAY_HAVE_PC_FDC
  125. bool
  126. config ZONE_DMA
  127. bool
  128. config NEED_DMA_MAP_STATE
  129. def_bool y
  130. config GENERIC_ISA_DMA
  131. bool
  132. config FIQ
  133. bool
  134. config ARCH_MTD_XIP
  135. bool
  136. config GENERIC_HARDIRQS_NO__DO_IRQ
  137. def_bool y
  138. config ARM_L1_CACHE_SHIFT_6
  139. bool
  140. help
  141. Setting ARM L1 cache line size to 64 Bytes.
  142. config VECTORS_BASE
  143. hex
  144. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  145. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  146. default 0x00000000
  147. help
  148. The base address of exception vectors.
  149. source "init/Kconfig"
  150. source "kernel/Kconfig.freezer"
  151. menu "System Type"
  152. config MMU
  153. bool "MMU-based Paged Memory Management Support"
  154. default y
  155. help
  156. Select if you want MMU-based virtualised addressing space
  157. support by paged memory management. If unsure, say 'Y'.
  158. #
  159. # The "ARM system type" choice list is ordered alphabetically by option
  160. # text. Please add new entries in the option alphabetic order.
  161. #
  162. choice
  163. prompt "ARM system type"
  164. default ARCH_VERSATILE
  165. config ARCH_AAEC2000
  166. bool "Agilent AAEC-2000 based"
  167. select CPU_ARM920T
  168. select ARM_AMBA
  169. select HAVE_CLK
  170. select ARCH_USES_GETTIMEOFFSET
  171. help
  172. This enables support for systems based on the Agilent AAEC-2000
  173. config ARCH_INTEGRATOR
  174. bool "ARM Ltd. Integrator family"
  175. select ARM_AMBA
  176. select ARCH_HAS_CPUFREQ
  177. select COMMON_CLKDEV
  178. select ICST
  179. select GENERIC_CLOCKEVENTS
  180. select PLAT_VERSATILE
  181. help
  182. Support for ARM's Integrator platform.
  183. config ARCH_REALVIEW
  184. bool "ARM Ltd. RealView family"
  185. select ARM_AMBA
  186. select COMMON_CLKDEV
  187. select ICST
  188. select GENERIC_CLOCKEVENTS
  189. select ARCH_WANT_OPTIONAL_GPIOLIB
  190. select PLAT_VERSATILE
  191. select ARM_TIMER_SP804
  192. select GPIO_PL061 if GPIOLIB
  193. help
  194. This enables support for ARM Ltd RealView boards.
  195. config ARCH_VERSATILE
  196. bool "ARM Ltd. Versatile family"
  197. select ARM_AMBA
  198. select ARM_VIC
  199. select COMMON_CLKDEV
  200. select ICST
  201. select GENERIC_CLOCKEVENTS
  202. select ARCH_WANT_OPTIONAL_GPIOLIB
  203. select PLAT_VERSATILE
  204. select ARM_TIMER_SP804
  205. help
  206. This enables support for ARM Ltd Versatile board.
  207. config ARCH_VEXPRESS
  208. bool "ARM Ltd. Versatile Express family"
  209. select ARCH_WANT_OPTIONAL_GPIOLIB
  210. select ARM_AMBA
  211. select ARM_TIMER_SP804
  212. select COMMON_CLKDEV
  213. select GENERIC_CLOCKEVENTS
  214. select HAVE_CLK
  215. select ICST
  216. select PLAT_VERSATILE
  217. help
  218. This enables support for the ARM Ltd Versatile Express boards.
  219. config ARCH_AT91
  220. bool "Atmel AT91"
  221. select ARCH_REQUIRE_GPIOLIB
  222. select HAVE_CLK
  223. select ARCH_USES_GETTIMEOFFSET
  224. help
  225. This enables support for systems based on the Atmel AT91RM9200,
  226. AT91SAM9 and AT91CAP9 processors.
  227. config ARCH_BCMRING
  228. bool "Broadcom BCMRING"
  229. depends on MMU
  230. select CPU_V6
  231. select ARM_AMBA
  232. select COMMON_CLKDEV
  233. select GENERIC_CLOCKEVENTS
  234. select ARCH_WANT_OPTIONAL_GPIOLIB
  235. help
  236. Support for Broadcom's BCMRing platform.
  237. config ARCH_CLPS711X
  238. bool "Cirrus Logic CLPS711x/EP721x-based"
  239. select CPU_ARM720T
  240. select ARCH_USES_GETTIMEOFFSET
  241. help
  242. Support for Cirrus Logic 711x/721x based boards.
  243. config ARCH_CNS3XXX
  244. bool "Cavium Networks CNS3XXX family"
  245. select CPU_V6
  246. select GENERIC_CLOCKEVENTS
  247. select ARM_GIC
  248. select PCI_DOMAINS if PCI
  249. help
  250. Support for Cavium Networks CNS3XXX platform.
  251. config ARCH_GEMINI
  252. bool "Cortina Systems Gemini"
  253. select CPU_FA526
  254. select ARCH_REQUIRE_GPIOLIB
  255. select ARCH_USES_GETTIMEOFFSET
  256. help
  257. Support for the Cortina Systems Gemini family SoCs
  258. config ARCH_EBSA110
  259. bool "EBSA-110"
  260. select CPU_SA110
  261. select ISA
  262. select NO_IOPORT
  263. select ARCH_USES_GETTIMEOFFSET
  264. help
  265. This is an evaluation board for the StrongARM processor available
  266. from Digital. It has limited hardware on-board, including an
  267. Ethernet interface, two PCMCIA sockets, two serial ports and a
  268. parallel port.
  269. config ARCH_EP93XX
  270. bool "EP93xx-based"
  271. select CPU_ARM920T
  272. select ARM_AMBA
  273. select ARM_VIC
  274. select COMMON_CLKDEV
  275. select ARCH_REQUIRE_GPIOLIB
  276. select ARCH_HAS_HOLES_MEMORYMODEL
  277. select ARCH_USES_GETTIMEOFFSET
  278. help
  279. This enables support for the Cirrus EP93xx series of CPUs.
  280. config ARCH_FOOTBRIDGE
  281. bool "FootBridge"
  282. select CPU_SA110
  283. select FOOTBRIDGE
  284. select ARCH_USES_GETTIMEOFFSET
  285. help
  286. Support for systems based on the DC21285 companion chip
  287. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  288. config ARCH_MXC
  289. bool "Freescale MXC/iMX-based"
  290. select GENERIC_CLOCKEVENTS
  291. select ARCH_REQUIRE_GPIOLIB
  292. select COMMON_CLKDEV
  293. help
  294. Support for Freescale MXC/iMX-based family of processors
  295. config ARCH_STMP3XXX
  296. bool "Freescale STMP3xxx"
  297. select CPU_ARM926T
  298. select COMMON_CLKDEV
  299. select ARCH_REQUIRE_GPIOLIB
  300. select GENERIC_CLOCKEVENTS
  301. select USB_ARCH_HAS_EHCI
  302. help
  303. Support for systems based on the Freescale 3xxx CPUs.
  304. config ARCH_NETX
  305. bool "Hilscher NetX based"
  306. select CPU_ARM926T
  307. select ARM_VIC
  308. select GENERIC_CLOCKEVENTS
  309. help
  310. This enables support for systems based on the Hilscher NetX Soc
  311. config ARCH_H720X
  312. bool "Hynix HMS720x-based"
  313. select CPU_ARM720T
  314. select ISA_DMA_API
  315. select ARCH_USES_GETTIMEOFFSET
  316. help
  317. This enables support for systems based on the Hynix HMS720x
  318. config ARCH_IOP13XX
  319. bool "IOP13xx-based"
  320. depends on MMU
  321. select CPU_XSC3
  322. select PLAT_IOP
  323. select PCI
  324. select ARCH_SUPPORTS_MSI
  325. select VMSPLIT_1G
  326. help
  327. Support for Intel's IOP13XX (XScale) family of processors.
  328. config ARCH_IOP32X
  329. bool "IOP32x-based"
  330. depends on MMU
  331. select CPU_XSCALE
  332. select PLAT_IOP
  333. select PCI
  334. select ARCH_REQUIRE_GPIOLIB
  335. help
  336. Support for Intel's 80219 and IOP32X (XScale) family of
  337. processors.
  338. config ARCH_IOP33X
  339. bool "IOP33x-based"
  340. depends on MMU
  341. select CPU_XSCALE
  342. select PLAT_IOP
  343. select PCI
  344. select ARCH_REQUIRE_GPIOLIB
  345. help
  346. Support for Intel's IOP33X (XScale) family of processors.
  347. config ARCH_IXP23XX
  348. bool "IXP23XX-based"
  349. depends on MMU
  350. select CPU_XSC3
  351. select PCI
  352. select ARCH_USES_GETTIMEOFFSET
  353. help
  354. Support for Intel's IXP23xx (XScale) family of processors.
  355. config ARCH_IXP2000
  356. bool "IXP2400/2800-based"
  357. depends on MMU
  358. select CPU_XSCALE
  359. select PCI
  360. select ARCH_USES_GETTIMEOFFSET
  361. help
  362. Support for Intel's IXP2400/2800 (XScale) family of processors.
  363. config ARCH_IXP4XX
  364. bool "IXP4xx-based"
  365. depends on MMU
  366. select CPU_XSCALE
  367. select GENERIC_GPIO
  368. select GENERIC_CLOCKEVENTS
  369. select DMABOUNCE if PCI
  370. help
  371. Support for Intel's IXP4XX (XScale) family of processors.
  372. config ARCH_L7200
  373. bool "LinkUp-L7200"
  374. select CPU_ARM720T
  375. select FIQ
  376. select ARCH_USES_GETTIMEOFFSET
  377. help
  378. Say Y here if you intend to run this kernel on a LinkUp Systems
  379. L7200 Software Development Board which uses an ARM720T processor.
  380. Information on this board can be obtained at:
  381. <http://www.linkupsys.com/>
  382. If you have any questions or comments about the Linux kernel port
  383. to this board, send e-mail to <sjhill@cotw.com>.
  384. config ARCH_DOVE
  385. bool "Marvell Dove"
  386. select PCI
  387. select ARCH_REQUIRE_GPIOLIB
  388. select GENERIC_CLOCKEVENTS
  389. select PLAT_ORION
  390. help
  391. Support for the Marvell Dove SoC 88AP510
  392. config ARCH_KIRKWOOD
  393. bool "Marvell Kirkwood"
  394. select CPU_FEROCEON
  395. select PCI
  396. select ARCH_REQUIRE_GPIOLIB
  397. select GENERIC_CLOCKEVENTS
  398. select PLAT_ORION
  399. help
  400. Support for the following Marvell Kirkwood series SoCs:
  401. 88F6180, 88F6192 and 88F6281.
  402. config ARCH_LOKI
  403. bool "Marvell Loki (88RC8480)"
  404. select CPU_FEROCEON
  405. select GENERIC_CLOCKEVENTS
  406. select PLAT_ORION
  407. help
  408. Support for the Marvell Loki (88RC8480) SoC.
  409. config ARCH_MV78XX0
  410. bool "Marvell MV78xx0"
  411. select CPU_FEROCEON
  412. select PCI
  413. select ARCH_REQUIRE_GPIOLIB
  414. select GENERIC_CLOCKEVENTS
  415. select PLAT_ORION
  416. help
  417. Support for the following Marvell MV78xx0 series SoCs:
  418. MV781x0, MV782x0.
  419. config ARCH_ORION5X
  420. bool "Marvell Orion"
  421. depends on MMU
  422. select CPU_FEROCEON
  423. select PCI
  424. select ARCH_REQUIRE_GPIOLIB
  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/MMP2"
  433. depends on MMU
  434. select ARCH_REQUIRE_GPIOLIB
  435. select COMMON_CLKDEV
  436. select GENERIC_CLOCKEVENTS
  437. select TICK_ONESHOT
  438. select PLAT_PXA
  439. help
  440. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  441. config ARCH_KS8695
  442. bool "Micrel/Kendin KS8695"
  443. select CPU_ARM922T
  444. select ARCH_REQUIRE_GPIOLIB
  445. select ARCH_USES_GETTIMEOFFSET
  446. help
  447. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  448. System-on-Chip devices.
  449. config ARCH_NS9XXX
  450. bool "NetSilicon NS9xxx"
  451. select CPU_ARM926T
  452. select GENERIC_GPIO
  453. select GENERIC_CLOCKEVENTS
  454. select HAVE_CLK
  455. help
  456. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  457. System.
  458. <http://www.digi.com/products/microprocessors/index.jsp>
  459. config ARCH_W90X900
  460. bool "Nuvoton W90X900 CPU"
  461. select CPU_ARM926T
  462. select ARCH_REQUIRE_GPIOLIB
  463. select COMMON_CLKDEV
  464. select GENERIC_CLOCKEVENTS
  465. help
  466. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  467. At present, the w90x900 has been renamed nuc900, regarding
  468. the ARM series product line, you can login the following
  469. link address to know more.
  470. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  471. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  472. config ARCH_NUC93X
  473. bool "Nuvoton NUC93X CPU"
  474. select CPU_ARM926T
  475. select COMMON_CLKDEV
  476. help
  477. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  478. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  479. config ARCH_PNX4008
  480. bool "Philips Nexperia PNX4008 Mobile"
  481. select CPU_ARM926T
  482. select COMMON_CLKDEV
  483. select ARCH_USES_GETTIMEOFFSET
  484. help
  485. This enables support for Philips PNX4008 mobile platform.
  486. config ARCH_PXA
  487. bool "PXA2xx/PXA3xx-based"
  488. depends on MMU
  489. select ARCH_MTD_XIP
  490. select ARCH_HAS_CPUFREQ
  491. select COMMON_CLKDEV
  492. select ARCH_REQUIRE_GPIOLIB
  493. select GENERIC_CLOCKEVENTS
  494. select TICK_ONESHOT
  495. select PLAT_PXA
  496. help
  497. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  498. config ARCH_MSM
  499. bool "Qualcomm MSM"
  500. select HAVE_CLK
  501. select GENERIC_CLOCKEVENTS
  502. select ARCH_REQUIRE_GPIOLIB
  503. help
  504. Support for Qualcomm MSM/QSD based systems. This runs on the
  505. apps processor of the MSM/QSD and depends on a shared memory
  506. interface to the modem processor which runs the baseband
  507. stack and controls some vital subsystems
  508. (clock and power control, etc).
  509. config ARCH_SHMOBILE
  510. bool "Renesas SH-Mobile"
  511. help
  512. Support for Renesas's SH-Mobile ARM platforms
  513. config ARCH_RPC
  514. bool "RiscPC"
  515. select ARCH_ACORN
  516. select FIQ
  517. select TIMER_ACORN
  518. select ARCH_MAY_HAVE_PC_FDC
  519. select HAVE_PATA_PLATFORM
  520. select ISA_DMA_API
  521. select NO_IOPORT
  522. select ARCH_SPARSEMEM_ENABLE
  523. select ARCH_USES_GETTIMEOFFSET
  524. help
  525. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  526. CD-ROM interface, serial and parallel port, and the floppy drive.
  527. config ARCH_SA1100
  528. bool "SA1100-based"
  529. select CPU_SA1100
  530. select ISA
  531. select ARCH_SPARSEMEM_ENABLE
  532. select ARCH_MTD_XIP
  533. select ARCH_HAS_CPUFREQ
  534. select CPU_FREQ
  535. select GENERIC_CLOCKEVENTS
  536. select HAVE_CLK
  537. select TICK_ONESHOT
  538. select ARCH_REQUIRE_GPIOLIB
  539. help
  540. Support for StrongARM 11x0 based boards.
  541. config ARCH_S3C2410
  542. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  543. select GENERIC_GPIO
  544. select ARCH_HAS_CPUFREQ
  545. select HAVE_CLK
  546. select ARCH_USES_GETTIMEOFFSET
  547. help
  548. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  549. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  550. the Samsung SMDK2410 development board (and derivatives).
  551. Note, the S3C2416 and the S3C2450 are so close that they even share
  552. the same SoC ID code. This means that there is no seperate machine
  553. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  554. config ARCH_S3C64XX
  555. bool "Samsung S3C64XX"
  556. select PLAT_SAMSUNG
  557. select CPU_V6
  558. select ARM_VIC
  559. select HAVE_CLK
  560. select NO_IOPORT
  561. select ARCH_USES_GETTIMEOFFSET
  562. select ARCH_HAS_CPUFREQ
  563. select ARCH_REQUIRE_GPIOLIB
  564. select SAMSUNG_CLKSRC
  565. select SAMSUNG_IRQ_VIC_TIMER
  566. select SAMSUNG_IRQ_UART
  567. select S3C_GPIO_TRACK
  568. select S3C_GPIO_PULL_UPDOWN
  569. select S3C_GPIO_CFG_S3C24XX
  570. select S3C_GPIO_CFG_S3C64XX
  571. select S3C_DEV_NAND
  572. select USB_ARCH_HAS_OHCI
  573. select SAMSUNG_GPIOLIB_4BIT
  574. help
  575. Samsung S3C64XX series based systems
  576. config ARCH_S5P6440
  577. bool "Samsung S5P6440"
  578. select CPU_V6
  579. select GENERIC_GPIO
  580. select HAVE_CLK
  581. select ARCH_USES_GETTIMEOFFSET
  582. help
  583. Samsung S5P6440 CPU based systems
  584. config ARCH_S5P6442
  585. bool "Samsung S5P6442"
  586. select CPU_V6
  587. select GENERIC_GPIO
  588. select HAVE_CLK
  589. select ARCH_USES_GETTIMEOFFSET
  590. help
  591. Samsung S5P6442 CPU based systems
  592. config ARCH_S5PC100
  593. bool "Samsung S5PC100"
  594. select GENERIC_GPIO
  595. select HAVE_CLK
  596. select CPU_V7
  597. select ARM_L1_CACHE_SHIFT_6
  598. select ARCH_USES_GETTIMEOFFSET
  599. help
  600. Samsung S5PC100 series based systems
  601. config ARCH_S5PV210
  602. bool "Samsung S5PV210/S5PC110"
  603. select CPU_V7
  604. select GENERIC_GPIO
  605. select HAVE_CLK
  606. select ARM_L1_CACHE_SHIFT_6
  607. select ARCH_USES_GETTIMEOFFSET
  608. help
  609. Samsung S5PV210/S5PC110 series based systems
  610. config ARCH_SHARK
  611. bool "Shark"
  612. select CPU_SA110
  613. select ISA
  614. select ISA_DMA
  615. select ZONE_DMA
  616. select PCI
  617. select ARCH_USES_GETTIMEOFFSET
  618. help
  619. Support for the StrongARM based Digital DNARD machine, also known
  620. as "Shark" (<http://www.shark-linux.de/shark.html>).
  621. config ARCH_LH7A40X
  622. bool "Sharp LH7A40X"
  623. select CPU_ARM922T
  624. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  625. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  626. select ARCH_USES_GETTIMEOFFSET
  627. help
  628. Say Y here for systems based on one of the Sharp LH7A40X
  629. System on a Chip processors. These CPUs include an ARM922T
  630. core with a wide array of integrated devices for
  631. hand-held and low-power applications.
  632. config ARCH_U300
  633. bool "ST-Ericsson U300 Series"
  634. depends on MMU
  635. select CPU_ARM926T
  636. select HAVE_TCM
  637. select ARM_AMBA
  638. select ARM_VIC
  639. select GENERIC_CLOCKEVENTS
  640. select COMMON_CLKDEV
  641. select GENERIC_GPIO
  642. help
  643. Support for ST-Ericsson U300 series mobile platforms.
  644. config ARCH_U8500
  645. bool "ST-Ericsson U8500 Series"
  646. select CPU_V7
  647. select ARM_AMBA
  648. select GENERIC_CLOCKEVENTS
  649. select COMMON_CLKDEV
  650. select ARCH_REQUIRE_GPIOLIB
  651. help
  652. Support for ST-Ericsson's Ux500 architecture
  653. config ARCH_NOMADIK
  654. bool "STMicroelectronics Nomadik"
  655. select ARM_AMBA
  656. select ARM_VIC
  657. select CPU_ARM926T
  658. select COMMON_CLKDEV
  659. select GENERIC_CLOCKEVENTS
  660. select ARCH_REQUIRE_GPIOLIB
  661. help
  662. Support for the Nomadik platform by ST-Ericsson
  663. config ARCH_DAVINCI
  664. bool "TI DaVinci"
  665. select GENERIC_CLOCKEVENTS
  666. select ARCH_REQUIRE_GPIOLIB
  667. select ZONE_DMA
  668. select HAVE_IDE
  669. select COMMON_CLKDEV
  670. select GENERIC_ALLOCATOR
  671. select ARCH_HAS_HOLES_MEMORYMODEL
  672. help
  673. Support for TI's DaVinci platform.
  674. config ARCH_OMAP
  675. bool "TI OMAP"
  676. select HAVE_CLK
  677. select ARCH_REQUIRE_GPIOLIB
  678. select ARCH_HAS_CPUFREQ
  679. select GENERIC_CLOCKEVENTS
  680. select ARCH_HAS_HOLES_MEMORYMODEL
  681. help
  682. Support for TI's OMAP platform (OMAP1 and OMAP2).
  683. config PLAT_SPEAR
  684. bool "ST SPEAr"
  685. select ARM_AMBA
  686. select ARCH_REQUIRE_GPIOLIB
  687. select COMMON_CLKDEV
  688. select GENERIC_CLOCKEVENTS
  689. select HAVE_CLK
  690. help
  691. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  692. endchoice
  693. #
  694. # This is sorted alphabetically by mach-* pathname. However, plat-*
  695. # Kconfigs may be included either alphabetically (according to the
  696. # plat- suffix) or along side the corresponding mach-* source.
  697. #
  698. source "arch/arm/mach-aaec2000/Kconfig"
  699. source "arch/arm/mach-at91/Kconfig"
  700. source "arch/arm/mach-bcmring/Kconfig"
  701. source "arch/arm/mach-clps711x/Kconfig"
  702. source "arch/arm/mach-cns3xxx/Kconfig"
  703. source "arch/arm/mach-davinci/Kconfig"
  704. source "arch/arm/mach-dove/Kconfig"
  705. source "arch/arm/mach-ep93xx/Kconfig"
  706. source "arch/arm/mach-footbridge/Kconfig"
  707. source "arch/arm/mach-gemini/Kconfig"
  708. source "arch/arm/mach-h720x/Kconfig"
  709. source "arch/arm/mach-integrator/Kconfig"
  710. source "arch/arm/mach-iop32x/Kconfig"
  711. source "arch/arm/mach-iop33x/Kconfig"
  712. source "arch/arm/mach-iop13xx/Kconfig"
  713. source "arch/arm/mach-ixp4xx/Kconfig"
  714. source "arch/arm/mach-ixp2000/Kconfig"
  715. source "arch/arm/mach-ixp23xx/Kconfig"
  716. source "arch/arm/mach-kirkwood/Kconfig"
  717. source "arch/arm/mach-ks8695/Kconfig"
  718. source "arch/arm/mach-lh7a40x/Kconfig"
  719. source "arch/arm/mach-loki/Kconfig"
  720. source "arch/arm/mach-msm/Kconfig"
  721. source "arch/arm/mach-mv78xx0/Kconfig"
  722. source "arch/arm/plat-mxc/Kconfig"
  723. source "arch/arm/mach-netx/Kconfig"
  724. source "arch/arm/mach-nomadik/Kconfig"
  725. source "arch/arm/plat-nomadik/Kconfig"
  726. source "arch/arm/mach-ns9xxx/Kconfig"
  727. source "arch/arm/mach-nuc93x/Kconfig"
  728. source "arch/arm/plat-omap/Kconfig"
  729. source "arch/arm/mach-omap1/Kconfig"
  730. source "arch/arm/mach-omap2/Kconfig"
  731. source "arch/arm/mach-orion5x/Kconfig"
  732. source "arch/arm/mach-pxa/Kconfig"
  733. source "arch/arm/plat-pxa/Kconfig"
  734. source "arch/arm/mach-mmp/Kconfig"
  735. source "arch/arm/mach-realview/Kconfig"
  736. source "arch/arm/mach-sa1100/Kconfig"
  737. source "arch/arm/plat-samsung/Kconfig"
  738. source "arch/arm/plat-s3c24xx/Kconfig"
  739. source "arch/arm/plat-s5p/Kconfig"
  740. source "arch/arm/plat-spear/Kconfig"
  741. if ARCH_S3C2410
  742. source "arch/arm/mach-s3c2400/Kconfig"
  743. source "arch/arm/mach-s3c2410/Kconfig"
  744. source "arch/arm/mach-s3c2412/Kconfig"
  745. source "arch/arm/mach-s3c2416/Kconfig"
  746. source "arch/arm/mach-s3c2440/Kconfig"
  747. source "arch/arm/mach-s3c2443/Kconfig"
  748. endif
  749. if ARCH_S3C64XX
  750. source "arch/arm/mach-s3c64xx/Kconfig"
  751. endif
  752. source "arch/arm/mach-s5p6440/Kconfig"
  753. source "arch/arm/mach-s5p6442/Kconfig"
  754. source "arch/arm/mach-s5pc100/Kconfig"
  755. source "arch/arm/mach-s5pv210/Kconfig"
  756. source "arch/arm/mach-shmobile/Kconfig"
  757. source "arch/arm/plat-stmp3xxx/Kconfig"
  758. source "arch/arm/mach-u300/Kconfig"
  759. source "arch/arm/mach-ux500/Kconfig"
  760. source "arch/arm/mach-versatile/Kconfig"
  761. source "arch/arm/mach-vexpress/Kconfig"
  762. source "arch/arm/mach-w90x900/Kconfig"
  763. # Definitions to make life easier
  764. config ARCH_ACORN
  765. bool
  766. config PLAT_IOP
  767. bool
  768. select GENERIC_CLOCKEVENTS
  769. config PLAT_ORION
  770. bool
  771. config PLAT_PXA
  772. bool
  773. config PLAT_VERSATILE
  774. bool
  775. config ARM_TIMER_SP804
  776. bool
  777. source arch/arm/mm/Kconfig
  778. config IWMMXT
  779. bool "Enable iWMMXt support"
  780. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  781. default y if PXA27x || PXA3xx || ARCH_MMP
  782. help
  783. Enable support for iWMMXt context switching at run time if
  784. running on a CPU that supports it.
  785. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  786. config XSCALE_PMU
  787. bool
  788. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  789. default y
  790. config CPU_HAS_PMU
  791. depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
  792. (!ARCH_OMAP3 || OMAP3_EMU)
  793. default y
  794. bool
  795. if !MMU
  796. source "arch/arm/Kconfig-nommu"
  797. endif
  798. config ARM_ERRATA_411920
  799. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  800. depends on CPU_V6 && !SMP
  801. help
  802. Invalidation of the Instruction Cache operation can
  803. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  804. It does not affect the MPCore. This option enables the ARM Ltd.
  805. recommended workaround.
  806. config ARM_ERRATA_430973
  807. bool "ARM errata: Stale prediction on replaced interworking branch"
  808. depends on CPU_V7
  809. help
  810. This option enables the workaround for the 430973 Cortex-A8
  811. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  812. interworking branch is replaced with another code sequence at the
  813. same virtual address, whether due to self-modifying code or virtual
  814. to physical address re-mapping, Cortex-A8 does not recover from the
  815. stale interworking branch prediction. This results in Cortex-A8
  816. executing the new code sequence in the incorrect ARM or Thumb state.
  817. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  818. and also flushes the branch target cache at every context switch.
  819. Note that setting specific bits in the ACTLR register may not be
  820. available in non-secure mode.
  821. config ARM_ERRATA_458693
  822. bool "ARM errata: Processor deadlock when a false hazard is created"
  823. depends on CPU_V7
  824. help
  825. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  826. erratum. For very specific sequences of memory operations, it is
  827. possible for a hazard condition intended for a cache line to instead
  828. be incorrectly associated with a different cache line. This false
  829. hazard might then cause a processor deadlock. The workaround enables
  830. the L1 caching of the NEON accesses and disables the PLD instruction
  831. in the ACTLR register. Note that setting specific bits in the ACTLR
  832. register may not be available in non-secure mode.
  833. config ARM_ERRATA_460075
  834. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  835. depends on CPU_V7
  836. help
  837. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  838. erratum. Any asynchronous access to the L2 cache may encounter a
  839. situation in which recent store transactions to the L2 cache are lost
  840. and overwritten with stale memory contents from external memory. The
  841. workaround disables the write-allocate mode for the L2 cache via the
  842. ACTLR register. Note that setting specific bits in the ACTLR register
  843. may not be available in non-secure mode.
  844. config PL310_ERRATA_588369
  845. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  846. depends on CACHE_L2X0 && ARCH_OMAP4
  847. help
  848. The PL310 L2 cache controller implements three types of Clean &
  849. Invalidate maintenance operations: by Physical Address
  850. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  851. They are architecturally defined to behave as the execution of a
  852. clean operation followed immediately by an invalidate operation,
  853. both performing to the same memory location. This functionality
  854. is not correctly implemented in PL310 as clean lines are not
  855. invalidated as a result of these operations. Note that this errata
  856. uses Texas Instrument's secure monitor api.
  857. endmenu
  858. source "arch/arm/common/Kconfig"
  859. config FORCE_MAX_ZONEORDER
  860. int
  861. depends on SA1111
  862. default "9"
  863. menu "Bus support"
  864. config ARM_AMBA
  865. bool
  866. config ISA
  867. bool
  868. help
  869. Find out whether you have ISA slots on your motherboard. ISA is the
  870. name of a bus system, i.e. the way the CPU talks to the other stuff
  871. inside your box. Other bus systems are PCI, EISA, MicroChannel
  872. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  873. newer boards don't support it. If you have ISA, say Y, otherwise N.
  874. # Select ISA DMA controller support
  875. config ISA_DMA
  876. bool
  877. select ISA_DMA_API
  878. # Select ISA DMA interface
  879. config ISA_DMA_API
  880. bool
  881. config PCI
  882. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE || ARCH_CNS3XXX
  883. help
  884. Find out whether you have a PCI motherboard. PCI is the name of a
  885. bus system, i.e. the way the CPU talks to the other stuff inside
  886. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  887. VESA. If you have PCI, say Y, otherwise N.
  888. config PCI_DOMAINS
  889. bool
  890. depends on PCI
  891. config PCI_SYSCALL
  892. def_bool PCI
  893. # Select the host bridge type
  894. config PCI_HOST_VIA82C505
  895. bool
  896. depends on PCI && ARCH_SHARK
  897. default y
  898. config PCI_HOST_ITE8152
  899. bool
  900. depends on PCI && MACH_ARMCORE
  901. default y
  902. select DMABOUNCE
  903. source "drivers/pci/Kconfig"
  904. source "drivers/pcmcia/Kconfig"
  905. endmenu
  906. menu "Kernel Features"
  907. source "kernel/time/Kconfig"
  908. config SMP
  909. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  910. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  911. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
  912. ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  913. depends on GENERIC_CLOCKEVENTS
  914. select USE_GENERIC_SMP_HELPERS
  915. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  916. help
  917. This enables support for systems with more than one CPU. If you have
  918. a system with only one CPU, like most personal computers, say N. If
  919. you have a system with more than one CPU, say Y.
  920. If you say N here, the kernel will run on single and multiprocessor
  921. machines, but will use only one CPU of a multiprocessor machine. If
  922. you say Y here, the kernel will run on many, but not all, single
  923. processor machines. On a single processor machine, the kernel will
  924. run faster if you say N here.
  925. See also <file:Documentation/i386/IO-APIC.txt>,
  926. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  927. <http://www.linuxdoc.org/docs.html#howto>.
  928. If you don't know what to do here, say N.
  929. config HAVE_ARM_SCU
  930. bool
  931. depends on SMP
  932. help
  933. This option enables support for the ARM system coherency unit
  934. config HAVE_ARM_TWD
  935. bool
  936. depends on SMP
  937. help
  938. This options enables support for the ARM timer and watchdog unit
  939. choice
  940. prompt "Memory split"
  941. default VMSPLIT_3G
  942. help
  943. Select the desired split between kernel and user memory.
  944. If you are not absolutely sure what you are doing, leave this
  945. option alone!
  946. config VMSPLIT_3G
  947. bool "3G/1G user/kernel split"
  948. config VMSPLIT_2G
  949. bool "2G/2G user/kernel split"
  950. config VMSPLIT_1G
  951. bool "1G/3G user/kernel split"
  952. endchoice
  953. config PAGE_OFFSET
  954. hex
  955. default 0x40000000 if VMSPLIT_1G
  956. default 0x80000000 if VMSPLIT_2G
  957. default 0xC0000000
  958. config NR_CPUS
  959. int "Maximum number of CPUs (2-32)"
  960. range 2 32
  961. depends on SMP
  962. default "4"
  963. config HOTPLUG_CPU
  964. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  965. depends on SMP && HOTPLUG && EXPERIMENTAL
  966. help
  967. Say Y here to experiment with turning CPUs off and on. CPUs
  968. can be controlled through /sys/devices/system/cpu.
  969. config LOCAL_TIMERS
  970. bool "Use local timer interrupts"
  971. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  972. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  973. default y
  974. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  975. help
  976. Enable support for local timers on SMP platforms, rather then the
  977. legacy IPI broadcast method. Local timers allows the system
  978. accounting to be spread across the timer interval, preventing a
  979. "thundering herd" at every timer tick.
  980. source kernel/Kconfig.preempt
  981. config HZ
  982. int
  983. default 128 if ARCH_L7200
  984. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
  985. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  986. default AT91_TIMER_HZ if ARCH_AT91
  987. default 100
  988. config THUMB2_KERNEL
  989. bool "Compile the kernel in Thumb-2 mode"
  990. depends on CPU_V7 && EXPERIMENTAL
  991. select AEABI
  992. select ARM_ASM_UNIFIED
  993. help
  994. By enabling this option, the kernel will be compiled in
  995. Thumb-2 mode. A compiler/assembler that understand the unified
  996. ARM-Thumb syntax is needed.
  997. If unsure, say N.
  998. config ARM_ASM_UNIFIED
  999. bool
  1000. config AEABI
  1001. bool "Use the ARM EABI to compile the kernel"
  1002. help
  1003. This option allows for the kernel to be compiled using the latest
  1004. ARM ABI (aka EABI). This is only useful if you are using a user
  1005. space environment that is also compiled with EABI.
  1006. Since there are major incompatibilities between the legacy ABI and
  1007. EABI, especially with regard to structure member alignment, this
  1008. option also changes the kernel syscall calling convention to
  1009. disambiguate both ABIs and allow for backward compatibility support
  1010. (selected with CONFIG_OABI_COMPAT).
  1011. To use this you need GCC version 4.0.0 or later.
  1012. config OABI_COMPAT
  1013. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1014. depends on AEABI && EXPERIMENTAL
  1015. default y
  1016. help
  1017. This option preserves the old syscall interface along with the
  1018. new (ARM EABI) one. It also provides a compatibility layer to
  1019. intercept syscalls that have structure arguments which layout
  1020. in memory differs between the legacy ABI and the new ARM EABI
  1021. (only for non "thumb" binaries). This option adds a tiny
  1022. overhead to all syscalls and produces a slightly larger kernel.
  1023. If you know you'll be using only pure EABI user space then you
  1024. can say N here. If this option is not selected and you attempt
  1025. to execute a legacy ABI binary then the result will be
  1026. UNPREDICTABLE (in fact it can be predicted that it won't work
  1027. at all). If in doubt say Y.
  1028. config ARCH_HAS_HOLES_MEMORYMODEL
  1029. bool
  1030. # Discontigmem is deprecated
  1031. config ARCH_DISCONTIGMEM_ENABLE
  1032. bool
  1033. config ARCH_SPARSEMEM_ENABLE
  1034. bool
  1035. config ARCH_SPARSEMEM_DEFAULT
  1036. def_bool ARCH_SPARSEMEM_ENABLE
  1037. config ARCH_SELECT_MEMORY_MODEL
  1038. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  1039. config NODES_SHIFT
  1040. int
  1041. default "4" if ARCH_LH7A40X
  1042. default "2"
  1043. depends on NEED_MULTIPLE_NODES
  1044. config HIGHMEM
  1045. bool "High Memory Support (EXPERIMENTAL)"
  1046. depends on MMU && EXPERIMENTAL
  1047. help
  1048. The address space of ARM processors is only 4 Gigabytes large
  1049. and it has to accommodate user address space, kernel address
  1050. space as well as some memory mapped IO. That means that, if you
  1051. have a large amount of physical memory and/or IO, not all of the
  1052. memory can be "permanently mapped" by the kernel. The physical
  1053. memory that is not permanently mapped is called "high memory".
  1054. Depending on the selected kernel/user memory split, minimum
  1055. vmalloc space and actual amount of RAM, you may not need this
  1056. option which should result in a slightly faster kernel.
  1057. If unsure, say n.
  1058. config HIGHPTE
  1059. bool "Allocate 2nd-level pagetables from highmem"
  1060. depends on HIGHMEM
  1061. depends on !OUTER_CACHE
  1062. config HW_PERF_EVENTS
  1063. bool "Enable hardware performance counter support for perf events"
  1064. depends on PERF_EVENTS && CPU_HAS_PMU
  1065. default y
  1066. help
  1067. Enable hardware performance counter support for perf events. If
  1068. disabled, perf events will use software events only.
  1069. source "mm/Kconfig"
  1070. config LEDS
  1071. bool "Timer and CPU usage LEDs"
  1072. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1073. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1074. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1075. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1076. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1077. ARCH_AT91 || ARCH_DAVINCI || \
  1078. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1079. help
  1080. If you say Y here, the LEDs on your machine will be used
  1081. to provide useful information about your current system status.
  1082. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1083. be able to select which LEDs are active using the options below. If
  1084. you are compiling a kernel for the EBSA-110 or the LART however, the
  1085. red LED will simply flash regularly to indicate that the system is
  1086. still functional. It is safe to say Y here if you have a CATS
  1087. system, but the driver will do nothing.
  1088. config LEDS_TIMER
  1089. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1090. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1091. || MACH_OMAP_PERSEUS2
  1092. depends on LEDS
  1093. depends on !GENERIC_CLOCKEVENTS
  1094. default y if ARCH_EBSA110
  1095. help
  1096. If you say Y here, one of the system LEDs (the green one on the
  1097. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1098. will flash regularly to indicate that the system is still
  1099. operational. This is mainly useful to kernel hackers who are
  1100. debugging unstable kernels.
  1101. The LART uses the same LED for both Timer LED and CPU usage LED
  1102. functions. You may choose to use both, but the Timer LED function
  1103. will overrule the CPU usage LED.
  1104. config LEDS_CPU
  1105. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1106. !ARCH_OMAP) \
  1107. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1108. || MACH_OMAP_PERSEUS2
  1109. depends on LEDS
  1110. help
  1111. If you say Y here, the red LED will be used to give a good real
  1112. time indication of CPU usage, by lighting whenever the idle task
  1113. is not currently executing.
  1114. The LART uses the same LED for both Timer LED and CPU usage LED
  1115. functions. You may choose to use both, but the Timer LED function
  1116. will overrule the CPU usage LED.
  1117. config ALIGNMENT_TRAP
  1118. bool
  1119. depends on CPU_CP15_MMU
  1120. default y if !ARCH_EBSA110
  1121. select HAVE_PROC_CPU if PROC_FS
  1122. help
  1123. ARM processors cannot fetch/store information which is not
  1124. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1125. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1126. fetch/store instructions will be emulated in software if you say
  1127. here, which has a severe performance impact. This is necessary for
  1128. correct operation of some network protocols. With an IP-only
  1129. configuration it is safe to say N, otherwise say Y.
  1130. config UACCESS_WITH_MEMCPY
  1131. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1132. depends on MMU && EXPERIMENTAL
  1133. default y if CPU_FEROCEON
  1134. help
  1135. Implement faster copy_to_user and clear_user methods for CPU
  1136. cores where a 8-word STM instruction give significantly higher
  1137. memory write throughput than a sequence of individual 32bit stores.
  1138. A possible side effect is a slight increase in scheduling latency
  1139. between threads sharing the same address space if they invoke
  1140. such copy operations with large buffers.
  1141. However, if the CPU data cache is using a write-allocate mode,
  1142. this option is unlikely to provide any performance gain.
  1143. config CC_STACKPROTECTOR
  1144. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1145. help
  1146. This option turns on the -fstack-protector GCC feature. This
  1147. feature puts, at the beginning of functions, a canary value on
  1148. the stack just before the return address, and validates
  1149. the value just before actually returning. Stack based buffer
  1150. overflows (that need to overwrite this return address) now also
  1151. overwrite the canary, which gets detected and the attack is then
  1152. neutralized via a kernel panic.
  1153. This feature requires gcc version 4.2 or above.
  1154. endmenu
  1155. menu "Boot options"
  1156. # Compressed boot loader in ROM. Yes, we really want to ask about
  1157. # TEXT and BSS so we preserve their values in the config files.
  1158. config ZBOOT_ROM_TEXT
  1159. hex "Compressed ROM boot loader base address"
  1160. default "0"
  1161. help
  1162. The physical address at which the ROM-able zImage is to be
  1163. placed in the target. Platforms which normally make use of
  1164. ROM-able zImage formats normally set this to a suitable
  1165. value in their defconfig file.
  1166. If ZBOOT_ROM is not enabled, this has no effect.
  1167. config ZBOOT_ROM_BSS
  1168. hex "Compressed ROM boot loader BSS address"
  1169. default "0"
  1170. help
  1171. The base address of an area of read/write memory in the target
  1172. for the ROM-able zImage which must be available while the
  1173. decompressor is running. It must be large enough to hold the
  1174. entire decompressed kernel plus an additional 128 KiB.
  1175. Platforms which normally make use of ROM-able zImage formats
  1176. normally set this to a suitable value in their defconfig file.
  1177. If ZBOOT_ROM is not enabled, this has no effect.
  1178. config ZBOOT_ROM
  1179. bool "Compressed boot loader in ROM/flash"
  1180. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1181. help
  1182. Say Y here if you intend to execute your compressed kernel image
  1183. (zImage) directly from ROM or flash. If unsure, say N.
  1184. config CMDLINE
  1185. string "Default kernel command string"
  1186. default ""
  1187. help
  1188. On some architectures (EBSA110 and CATS), there is currently no way
  1189. for the boot loader to pass arguments to the kernel. For these
  1190. architectures, you should supply some command-line options at build
  1191. time by entering them here. As a minimum, you should specify the
  1192. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1193. config CMDLINE_FORCE
  1194. bool "Always use the default kernel command string"
  1195. depends on CMDLINE != ""
  1196. help
  1197. Always use the default kernel command string, even if the boot
  1198. loader passes other arguments to the kernel.
  1199. This is useful if you cannot or don't want to change the
  1200. command-line options your boot loader passes to the kernel.
  1201. If unsure, say N.
  1202. config XIP_KERNEL
  1203. bool "Kernel Execute-In-Place from ROM"
  1204. depends on !ZBOOT_ROM
  1205. help
  1206. Execute-In-Place allows the kernel to run from non-volatile storage
  1207. directly addressable by the CPU, such as NOR flash. This saves RAM
  1208. space since the text section of the kernel is not loaded from flash
  1209. to RAM. Read-write sections, such as the data section and stack,
  1210. are still copied to RAM. The XIP kernel is not compressed since
  1211. it has to run directly from flash, so it will take more space to
  1212. store it. The flash address used to link the kernel object files,
  1213. and for storing it, is configuration dependent. Therefore, if you
  1214. say Y here, you must know the proper physical address where to
  1215. store the kernel image depending on your own flash memory usage.
  1216. Also note that the make target becomes "make xipImage" rather than
  1217. "make zImage" or "make Image". The final kernel binary to put in
  1218. ROM memory will be arch/arm/boot/xipImage.
  1219. If unsure, say N.
  1220. config XIP_PHYS_ADDR
  1221. hex "XIP Kernel Physical Location"
  1222. depends on XIP_KERNEL
  1223. default "0x00080000"
  1224. help
  1225. This is the physical address in your flash memory the kernel will
  1226. be linked for and stored to. This address is dependent on your
  1227. own flash usage.
  1228. config KEXEC
  1229. bool "Kexec system call (EXPERIMENTAL)"
  1230. depends on EXPERIMENTAL
  1231. help
  1232. kexec is a system call that implements the ability to shutdown your
  1233. current kernel, and to start another kernel. It is like a reboot
  1234. but it is independent of the system firmware. And like a reboot
  1235. you can start any kernel with it, not just Linux.
  1236. It is an ongoing process to be certain the hardware in a machine
  1237. is properly shutdown, so do not be surprised if this code does not
  1238. initially work for you. It may help to enable device hotplugging
  1239. support.
  1240. config ATAGS_PROC
  1241. bool "Export atags in procfs"
  1242. depends on KEXEC
  1243. default y
  1244. help
  1245. Should the atags used to boot the kernel be exported in an "atags"
  1246. file in procfs. Useful with kexec.
  1247. endmenu
  1248. menu "CPU Power Management"
  1249. if ARCH_HAS_CPUFREQ
  1250. source "drivers/cpufreq/Kconfig"
  1251. config CPU_FREQ_SA1100
  1252. bool
  1253. config CPU_FREQ_SA1110
  1254. bool
  1255. config CPU_FREQ_INTEGRATOR
  1256. tristate "CPUfreq driver for ARM Integrator CPUs"
  1257. depends on ARCH_INTEGRATOR && CPU_FREQ
  1258. default y
  1259. help
  1260. This enables the CPUfreq driver for ARM Integrator CPUs.
  1261. For details, take a look at <file:Documentation/cpu-freq>.
  1262. If in doubt, say Y.
  1263. config CPU_FREQ_PXA
  1264. bool
  1265. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1266. default y
  1267. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1268. config CPU_FREQ_S3C64XX
  1269. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1270. depends on CPU_FREQ && CPU_S3C6410
  1271. config CPU_FREQ_S3C
  1272. bool
  1273. help
  1274. Internal configuration node for common cpufreq on Samsung SoC
  1275. config CPU_FREQ_S3C24XX
  1276. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1277. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1278. select CPU_FREQ_S3C
  1279. help
  1280. This enables the CPUfreq driver for the Samsung S3C24XX family
  1281. of CPUs.
  1282. For details, take a look at <file:Documentation/cpu-freq>.
  1283. If in doubt, say N.
  1284. config CPU_FREQ_S3C24XX_PLL
  1285. bool "Support CPUfreq changing of PLL frequency"
  1286. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1287. help
  1288. Compile in support for changing the PLL frequency from the
  1289. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1290. after a frequency change, so by default it is not enabled.
  1291. This also means that the PLL tables for the selected CPU(s) will
  1292. be built which may increase the size of the kernel image.
  1293. config CPU_FREQ_S3C24XX_DEBUG
  1294. bool "Debug CPUfreq Samsung driver core"
  1295. depends on CPU_FREQ_S3C24XX
  1296. help
  1297. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1298. config CPU_FREQ_S3C24XX_IODEBUG
  1299. bool "Debug CPUfreq Samsung driver IO timing"
  1300. depends on CPU_FREQ_S3C24XX
  1301. help
  1302. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1303. config CPU_FREQ_S3C24XX_DEBUGFS
  1304. bool "Export debugfs for CPUFreq"
  1305. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1306. help
  1307. Export status information via debugfs.
  1308. endif
  1309. source "drivers/cpuidle/Kconfig"
  1310. endmenu
  1311. menu "Floating point emulation"
  1312. comment "At least one emulation must be selected"
  1313. config FPE_NWFPE
  1314. bool "NWFPE math emulation"
  1315. depends on !AEABI || OABI_COMPAT
  1316. ---help---
  1317. Say Y to include the NWFPE floating point emulator in the kernel.
  1318. This is necessary to run most binaries. Linux does not currently
  1319. support floating point hardware so you need to say Y here even if
  1320. your machine has an FPA or floating point co-processor podule.
  1321. You may say N here if you are going to load the Acorn FPEmulator
  1322. early in the bootup.
  1323. config FPE_NWFPE_XP
  1324. bool "Support extended precision"
  1325. depends on FPE_NWFPE
  1326. help
  1327. Say Y to include 80-bit support in the kernel floating-point
  1328. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1329. Note that gcc does not generate 80-bit operations by default,
  1330. so in most cases this option only enlarges the size of the
  1331. floating point emulator without any good reason.
  1332. You almost surely want to say N here.
  1333. config FPE_FASTFPE
  1334. bool "FastFPE math emulation (EXPERIMENTAL)"
  1335. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1336. ---help---
  1337. Say Y here to include the FAST floating point emulator in the kernel.
  1338. This is an experimental much faster emulator which now also has full
  1339. precision for the mantissa. It does not support any exceptions.
  1340. It is very simple, and approximately 3-6 times faster than NWFPE.
  1341. It should be sufficient for most programs. It may be not suitable
  1342. for scientific calculations, but you have to check this for yourself.
  1343. If you do not feel you need a faster FP emulation you should better
  1344. choose NWFPE.
  1345. config VFP
  1346. bool "VFP-format floating point maths"
  1347. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1348. help
  1349. Say Y to include VFP support code in the kernel. This is needed
  1350. if your hardware includes a VFP unit.
  1351. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1352. release notes and additional status information.
  1353. Say N if your target does not have VFP hardware.
  1354. config VFPv3
  1355. bool
  1356. depends on VFP
  1357. default y if CPU_V7
  1358. config NEON
  1359. bool "Advanced SIMD (NEON) Extension support"
  1360. depends on VFPv3 && CPU_V7
  1361. help
  1362. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1363. Extension.
  1364. endmenu
  1365. menu "Userspace binary formats"
  1366. source "fs/Kconfig.binfmt"
  1367. config ARTHUR
  1368. tristate "RISC OS personality"
  1369. depends on !AEABI
  1370. help
  1371. Say Y here to include the kernel code necessary if you want to run
  1372. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1373. experimental; if this sounds frightening, say N and sleep in peace.
  1374. You can also say M here to compile this support as a module (which
  1375. will be called arthur).
  1376. endmenu
  1377. menu "Power management options"
  1378. source "kernel/power/Kconfig"
  1379. config ARCH_SUSPEND_POSSIBLE
  1380. def_bool y
  1381. endmenu
  1382. source "net/Kconfig"
  1383. source "drivers/Kconfig"
  1384. source "fs/Kconfig"
  1385. source "arch/arm/Kconfig.debug"
  1386. source "security/Kconfig"
  1387. source "crypto/Kconfig"
  1388. source "lib/Kconfig"