Kconfig 44 KB

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  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see Documentation/kbuild/kconfig-language.txt.
  4. #
  5. mainmenu "Linux Kernel Configuration"
  6. config ARM
  7. bool
  8. default y
  9. select HAVE_AOUT
  10. select HAVE_IDE
  11. select HAVE_MEMBLOCK
  12. select RTC_LIB
  13. select SYS_SUPPORTS_APM_EMULATION
  14. select GENERIC_ATOMIC64 if (!CPU_32v6K)
  15. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  16. select HAVE_ARCH_KGDB
  17. select HAVE_KPROBES if (!XIP_KERNEL)
  18. select HAVE_KRETPROBES if (HAVE_KPROBES)
  19. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  20. select HAVE_GENERIC_DMA_COHERENT
  21. select HAVE_KERNEL_GZIP
  22. select HAVE_KERNEL_LZO
  23. select HAVE_KERNEL_LZMA
  24. select HAVE_PERF_EVENTS
  25. select PERF_USE_VMALLOC
  26. select HAVE_REGS_AND_STACK_ACCESS_API
  27. help
  28. The ARM series is a line of low-power-consumption RISC chip designs
  29. licensed by ARM Ltd and targeted at embedded applications and
  30. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  31. manufactured, but legacy ARM-based PC hardware remains popular in
  32. Europe. There is an ARM Linux project with a web page at
  33. <http://www.arm.linux.org.uk/>.
  34. config HAVE_PWM
  35. bool
  36. config SYS_SUPPORTS_APM_EMULATION
  37. bool
  38. config GENERIC_GPIO
  39. bool
  40. config GENERIC_TIME
  41. bool
  42. default y
  43. config ARCH_USES_GETTIMEOFFSET
  44. bool
  45. default n
  46. config GENERIC_CLOCKEVENTS
  47. bool
  48. config GENERIC_CLOCKEVENTS_BROADCAST
  49. bool
  50. depends on GENERIC_CLOCKEVENTS
  51. default y if SMP
  52. config HAVE_TCM
  53. bool
  54. select GENERIC_ALLOCATOR
  55. config HAVE_PROC_CPU
  56. bool
  57. config NO_IOPORT
  58. bool
  59. config EISA
  60. bool
  61. ---help---
  62. The Extended Industry Standard Architecture (EISA) bus was
  63. developed as an open alternative to the IBM MicroChannel bus.
  64. The EISA bus provided some of the features of the IBM MicroChannel
  65. bus while maintaining backward compatibility with cards made for
  66. the older ISA bus. The EISA bus saw limited use between 1988 and
  67. 1995 when it was made obsolete by the PCI bus.
  68. Say Y here if you are building a kernel for an EISA-based machine.
  69. Otherwise, say N.
  70. config SBUS
  71. bool
  72. config MCA
  73. bool
  74. help
  75. MicroChannel Architecture is found in some IBM PS/2 machines and
  76. laptops. It is a bus system similar to PCI or ISA. See
  77. <file:Documentation/mca.txt> (and especially the web page given
  78. there) before attempting to build an MCA bus kernel.
  79. config GENERIC_HARDIRQS
  80. bool
  81. default y
  82. config STACKTRACE_SUPPORT
  83. bool
  84. default y
  85. config HAVE_LATENCYTOP_SUPPORT
  86. bool
  87. depends on !SMP
  88. default y
  89. config LOCKDEP_SUPPORT
  90. bool
  91. default y
  92. config TRACE_IRQFLAGS_SUPPORT
  93. bool
  94. default y
  95. config HARDIRQS_SW_RESEND
  96. bool
  97. default y
  98. config GENERIC_IRQ_PROBE
  99. bool
  100. default y
  101. config GENERIC_LOCKBREAK
  102. bool
  103. default y
  104. depends on SMP && PREEMPT
  105. config RWSEM_GENERIC_SPINLOCK
  106. bool
  107. default y
  108. config RWSEM_XCHGADD_ALGORITHM
  109. bool
  110. config ARCH_HAS_ILOG2_U32
  111. bool
  112. config ARCH_HAS_ILOG2_U64
  113. bool
  114. config ARCH_HAS_CPUFREQ
  115. bool
  116. help
  117. Internal node to signify that the ARCH has CPUFREQ support
  118. and that the relevant menu configurations are displayed for
  119. it.
  120. config GENERIC_HWEIGHT
  121. bool
  122. default y
  123. config GENERIC_CALIBRATE_DELAY
  124. bool
  125. default y
  126. config ARCH_MAY_HAVE_PC_FDC
  127. bool
  128. config ZONE_DMA
  129. bool
  130. config NEED_DMA_MAP_STATE
  131. def_bool y
  132. config GENERIC_ISA_DMA
  133. bool
  134. config FIQ
  135. bool
  136. config ARCH_MTD_XIP
  137. bool
  138. config GENERIC_HARDIRQS_NO__DO_IRQ
  139. def_bool y
  140. config ARM_L1_CACHE_SHIFT_6
  141. bool
  142. help
  143. Setting ARM L1 cache line size to 64 Bytes.
  144. config VECTORS_BASE
  145. hex
  146. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  147. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  148. default 0x00000000
  149. help
  150. The base address of exception vectors.
  151. source "init/Kconfig"
  152. source "kernel/Kconfig.freezer"
  153. menu "System Type"
  154. config MMU
  155. bool "MMU-based Paged Memory Management Support"
  156. default y
  157. help
  158. Select if you want MMU-based virtualised addressing space
  159. support by paged memory management. If unsure, say 'Y'.
  160. #
  161. # The "ARM system type" choice list is ordered alphabetically by option
  162. # text. Please add new entries in the option alphabetic order.
  163. #
  164. choice
  165. prompt "ARM system type"
  166. default ARCH_VERSATILE
  167. config ARCH_AAEC2000
  168. bool "Agilent AAEC-2000 based"
  169. select CPU_ARM920T
  170. select ARM_AMBA
  171. select HAVE_CLK
  172. select ARCH_USES_GETTIMEOFFSET
  173. help
  174. This enables support for systems based on the Agilent AAEC-2000
  175. config ARCH_INTEGRATOR
  176. bool "ARM Ltd. Integrator family"
  177. select ARM_AMBA
  178. select ARCH_HAS_CPUFREQ
  179. select COMMON_CLKDEV
  180. select ICST
  181. select GENERIC_CLOCKEVENTS
  182. select PLAT_VERSATILE
  183. help
  184. Support for ARM's Integrator platform.
  185. config ARCH_REALVIEW
  186. bool "ARM Ltd. RealView family"
  187. select ARM_AMBA
  188. select COMMON_CLKDEV
  189. select ICST
  190. select GENERIC_CLOCKEVENTS
  191. select ARCH_WANT_OPTIONAL_GPIOLIB
  192. select PLAT_VERSATILE
  193. select ARM_TIMER_SP804
  194. select GPIO_PL061 if GPIOLIB
  195. help
  196. This enables support for ARM Ltd RealView boards.
  197. config ARCH_VERSATILE
  198. bool "ARM Ltd. Versatile family"
  199. select ARM_AMBA
  200. select ARM_VIC
  201. select COMMON_CLKDEV
  202. select ICST
  203. select GENERIC_CLOCKEVENTS
  204. select ARCH_WANT_OPTIONAL_GPIOLIB
  205. select PLAT_VERSATILE
  206. select ARM_TIMER_SP804
  207. help
  208. This enables support for ARM Ltd Versatile board.
  209. config ARCH_VEXPRESS
  210. bool "ARM Ltd. Versatile Express family"
  211. select ARCH_WANT_OPTIONAL_GPIOLIB
  212. select ARM_AMBA
  213. select ARM_TIMER_SP804
  214. select COMMON_CLKDEV
  215. select GENERIC_CLOCKEVENTS
  216. select HAVE_CLK
  217. select ICST
  218. select PLAT_VERSATILE
  219. help
  220. This enables support for the ARM Ltd Versatile Express boards.
  221. config ARCH_AT91
  222. bool "Atmel AT91"
  223. select ARCH_REQUIRE_GPIOLIB
  224. select HAVE_CLK
  225. select ARCH_USES_GETTIMEOFFSET
  226. help
  227. This enables support for systems based on the Atmel AT91RM9200,
  228. AT91SAM9 and AT91CAP9 processors.
  229. config ARCH_BCMRING
  230. bool "Broadcom BCMRING"
  231. depends on MMU
  232. select CPU_V6
  233. select ARM_AMBA
  234. select COMMON_CLKDEV
  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. select ARCH_USES_GETTIMEOFFSET
  243. help
  244. Support for Cirrus Logic 711x/721x based boards.
  245. config ARCH_CNS3XXX
  246. bool "Cavium Networks CNS3XXX family"
  247. select CPU_V6
  248. select GENERIC_CLOCKEVENTS
  249. select ARM_GIC
  250. help
  251. Support for Cavium Networks CNS3XXX platform.
  252. config ARCH_GEMINI
  253. bool "Cortina Systems Gemini"
  254. select CPU_FA526
  255. select ARCH_REQUIRE_GPIOLIB
  256. select ARCH_USES_GETTIMEOFFSET
  257. help
  258. Support for the Cortina Systems Gemini family SoCs
  259. config ARCH_EBSA110
  260. bool "EBSA-110"
  261. select CPU_SA110
  262. select ISA
  263. select NO_IOPORT
  264. select ARCH_USES_GETTIMEOFFSET
  265. help
  266. This is an evaluation board for the StrongARM processor available
  267. from Digital. It has limited hardware on-board, including an
  268. Ethernet interface, two PCMCIA sockets, two serial ports and a
  269. parallel port.
  270. config ARCH_EP93XX
  271. bool "EP93xx-based"
  272. select CPU_ARM920T
  273. select ARM_AMBA
  274. select ARM_VIC
  275. select COMMON_CLKDEV
  276. select ARCH_REQUIRE_GPIOLIB
  277. select ARCH_HAS_HOLES_MEMORYMODEL
  278. select ARCH_USES_GETTIMEOFFSET
  279. help
  280. This enables support for the Cirrus EP93xx series of CPUs.
  281. config ARCH_FOOTBRIDGE
  282. bool "FootBridge"
  283. select CPU_SA110
  284. select FOOTBRIDGE
  285. select ARCH_USES_GETTIMEOFFSET
  286. help
  287. Support for systems based on the DC21285 companion chip
  288. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  289. config ARCH_MXC
  290. bool "Freescale MXC/iMX-based"
  291. select GENERIC_CLOCKEVENTS
  292. select ARCH_REQUIRE_GPIOLIB
  293. select COMMON_CLKDEV
  294. help
  295. Support for Freescale MXC/iMX-based family of processors
  296. config ARCH_STMP3XXX
  297. bool "Freescale STMP3xxx"
  298. select CPU_ARM926T
  299. select COMMON_CLKDEV
  300. select ARCH_REQUIRE_GPIOLIB
  301. select GENERIC_CLOCKEVENTS
  302. select USB_ARCH_HAS_EHCI
  303. help
  304. Support for systems based on the Freescale 3xxx CPUs.
  305. config ARCH_NETX
  306. bool "Hilscher NetX based"
  307. select CPU_ARM926T
  308. select ARM_VIC
  309. select GENERIC_CLOCKEVENTS
  310. help
  311. This enables support for systems based on the Hilscher NetX Soc
  312. config ARCH_H720X
  313. bool "Hynix HMS720x-based"
  314. select CPU_ARM720T
  315. select ISA_DMA_API
  316. select ARCH_USES_GETTIMEOFFSET
  317. help
  318. This enables support for systems based on the Hynix HMS720x
  319. config ARCH_IOP13XX
  320. bool "IOP13xx-based"
  321. depends on MMU
  322. select CPU_XSC3
  323. select PLAT_IOP
  324. select PCI
  325. select ARCH_SUPPORTS_MSI
  326. select VMSPLIT_1G
  327. help
  328. Support for Intel's IOP13XX (XScale) family of processors.
  329. config ARCH_IOP32X
  330. bool "IOP32x-based"
  331. depends on MMU
  332. select CPU_XSCALE
  333. select PLAT_IOP
  334. select PCI
  335. select ARCH_REQUIRE_GPIOLIB
  336. help
  337. Support for Intel's 80219 and IOP32X (XScale) family of
  338. processors.
  339. config ARCH_IOP33X
  340. bool "IOP33x-based"
  341. depends on MMU
  342. select CPU_XSCALE
  343. select PLAT_IOP
  344. select PCI
  345. select ARCH_REQUIRE_GPIOLIB
  346. help
  347. Support for Intel's IOP33X (XScale) family of processors.
  348. config ARCH_IXP23XX
  349. bool "IXP23XX-based"
  350. depends on MMU
  351. select CPU_XSC3
  352. select PCI
  353. select ARCH_USES_GETTIMEOFFSET
  354. help
  355. Support for Intel's IXP23xx (XScale) family of processors.
  356. config ARCH_IXP2000
  357. bool "IXP2400/2800-based"
  358. depends on MMU
  359. select CPU_XSCALE
  360. select PCI
  361. select ARCH_USES_GETTIMEOFFSET
  362. help
  363. Support for Intel's IXP2400/2800 (XScale) family of processors.
  364. config ARCH_IXP4XX
  365. bool "IXP4xx-based"
  366. depends on MMU
  367. select CPU_XSCALE
  368. select GENERIC_GPIO
  369. select GENERIC_CLOCKEVENTS
  370. select DMABOUNCE if PCI
  371. help
  372. Support for Intel's IXP4XX (XScale) family of processors.
  373. config ARCH_DOVE
  374. bool "Marvell Dove"
  375. select PCI
  376. select ARCH_REQUIRE_GPIOLIB
  377. select GENERIC_CLOCKEVENTS
  378. select PLAT_ORION
  379. help
  380. Support for the Marvell Dove SoC 88AP510
  381. config ARCH_KIRKWOOD
  382. bool "Marvell Kirkwood"
  383. select CPU_FEROCEON
  384. select PCI
  385. select ARCH_REQUIRE_GPIOLIB
  386. select GENERIC_CLOCKEVENTS
  387. select PLAT_ORION
  388. help
  389. Support for the following Marvell Kirkwood series SoCs:
  390. 88F6180, 88F6192 and 88F6281.
  391. config ARCH_LOKI
  392. bool "Marvell Loki (88RC8480)"
  393. select CPU_FEROCEON
  394. select GENERIC_CLOCKEVENTS
  395. select PLAT_ORION
  396. help
  397. Support for the Marvell Loki (88RC8480) SoC.
  398. config ARCH_MV78XX0
  399. bool "Marvell MV78xx0"
  400. select CPU_FEROCEON
  401. select PCI
  402. select ARCH_REQUIRE_GPIOLIB
  403. select GENERIC_CLOCKEVENTS
  404. select PLAT_ORION
  405. help
  406. Support for the following Marvell MV78xx0 series SoCs:
  407. MV781x0, MV782x0.
  408. config ARCH_ORION5X
  409. bool "Marvell Orion"
  410. depends on MMU
  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 Orion 5x series SoCs:
  418. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  419. Orion-2 (5281), Orion-1-90 (6183).
  420. config ARCH_MMP
  421. bool "Marvell PXA168/910/MMP2"
  422. depends on MMU
  423. select ARCH_REQUIRE_GPIOLIB
  424. select COMMON_CLKDEV
  425. select GENERIC_CLOCKEVENTS
  426. select TICK_ONESHOT
  427. select PLAT_PXA
  428. help
  429. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  430. config ARCH_KS8695
  431. bool "Micrel/Kendin KS8695"
  432. select CPU_ARM922T
  433. select ARCH_REQUIRE_GPIOLIB
  434. select ARCH_USES_GETTIMEOFFSET
  435. help
  436. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  437. System-on-Chip devices.
  438. config ARCH_NS9XXX
  439. bool "NetSilicon NS9xxx"
  440. select CPU_ARM926T
  441. select GENERIC_GPIO
  442. select GENERIC_CLOCKEVENTS
  443. select HAVE_CLK
  444. help
  445. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  446. System.
  447. <http://www.digi.com/products/microprocessors/index.jsp>
  448. config ARCH_W90X900
  449. bool "Nuvoton W90X900 CPU"
  450. select CPU_ARM926T
  451. select ARCH_REQUIRE_GPIOLIB
  452. select COMMON_CLKDEV
  453. select GENERIC_CLOCKEVENTS
  454. help
  455. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  456. At present, the w90x900 has been renamed nuc900, regarding
  457. the ARM series product line, you can login the following
  458. link address to know more.
  459. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  460. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  461. config ARCH_NUC93X
  462. bool "Nuvoton NUC93X CPU"
  463. select CPU_ARM926T
  464. select COMMON_CLKDEV
  465. help
  466. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  467. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  468. config ARCH_PNX4008
  469. bool "Philips Nexperia PNX4008 Mobile"
  470. select CPU_ARM926T
  471. select COMMON_CLKDEV
  472. select ARCH_USES_GETTIMEOFFSET
  473. help
  474. This enables support for Philips PNX4008 mobile platform.
  475. config ARCH_PXA
  476. bool "PXA2xx/PXA3xx-based"
  477. depends on MMU
  478. select ARCH_MTD_XIP
  479. select ARCH_HAS_CPUFREQ
  480. select COMMON_CLKDEV
  481. select ARCH_REQUIRE_GPIOLIB
  482. select GENERIC_CLOCKEVENTS
  483. select TICK_ONESHOT
  484. select PLAT_PXA
  485. help
  486. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  487. config ARCH_MSM
  488. bool "Qualcomm MSM"
  489. select HAVE_CLK
  490. select GENERIC_CLOCKEVENTS
  491. help
  492. Support for Qualcomm MSM/QSD based systems. This runs on the
  493. apps processor of the MSM/QSD and depends on a shared memory
  494. interface to the modem processor which runs the baseband
  495. stack and controls some vital subsystems
  496. (clock and power control, etc).
  497. config ARCH_SHMOBILE
  498. bool "Renesas SH-Mobile"
  499. help
  500. Support for Renesas's SH-Mobile ARM platforms
  501. config ARCH_RPC
  502. bool "RiscPC"
  503. select ARCH_ACORN
  504. select FIQ
  505. select TIMER_ACORN
  506. select ARCH_MAY_HAVE_PC_FDC
  507. select HAVE_PATA_PLATFORM
  508. select ISA_DMA_API
  509. select NO_IOPORT
  510. select ARCH_SPARSEMEM_ENABLE
  511. select ARCH_USES_GETTIMEOFFSET
  512. help
  513. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  514. CD-ROM interface, serial and parallel port, and the floppy drive.
  515. config ARCH_SA1100
  516. bool "SA1100-based"
  517. select CPU_SA1100
  518. select ISA
  519. select ARCH_SPARSEMEM_ENABLE
  520. select ARCH_MTD_XIP
  521. select ARCH_HAS_CPUFREQ
  522. select CPU_FREQ
  523. select GENERIC_CLOCKEVENTS
  524. select HAVE_CLK
  525. select TICK_ONESHOT
  526. select ARCH_REQUIRE_GPIOLIB
  527. help
  528. Support for StrongARM 11x0 based boards.
  529. config ARCH_S3C2410
  530. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  531. select GENERIC_GPIO
  532. select ARCH_HAS_CPUFREQ
  533. select HAVE_CLK
  534. select ARCH_USES_GETTIMEOFFSET
  535. help
  536. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  537. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  538. the Samsung SMDK2410 development board (and derivatives).
  539. Note, the S3C2416 and the S3C2450 are so close that they even share
  540. the same SoC ID code. This means that there is no seperate machine
  541. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  542. config ARCH_S3C64XX
  543. bool "Samsung S3C64XX"
  544. select PLAT_SAMSUNG
  545. select CPU_V6
  546. select ARM_VIC
  547. select HAVE_CLK
  548. select NO_IOPORT
  549. select ARCH_USES_GETTIMEOFFSET
  550. select ARCH_HAS_CPUFREQ
  551. select ARCH_REQUIRE_GPIOLIB
  552. select SAMSUNG_CLKSRC
  553. select SAMSUNG_IRQ_VIC_TIMER
  554. select SAMSUNG_IRQ_UART
  555. select S3C_GPIO_TRACK
  556. select S3C_GPIO_PULL_UPDOWN
  557. select S3C_GPIO_CFG_S3C24XX
  558. select S3C_GPIO_CFG_S3C64XX
  559. select S3C_DEV_NAND
  560. select USB_ARCH_HAS_OHCI
  561. select SAMSUNG_GPIOLIB_4BIT
  562. help
  563. Samsung S3C64XX series based systems
  564. config ARCH_S5P6440
  565. bool "Samsung S5P6440"
  566. select CPU_V6
  567. select GENERIC_GPIO
  568. select HAVE_CLK
  569. select ARCH_USES_GETTIMEOFFSET
  570. help
  571. Samsung S5P6440 CPU based systems
  572. config ARCH_S5P6442
  573. bool "Samsung S5P6442"
  574. select CPU_V6
  575. select GENERIC_GPIO
  576. select HAVE_CLK
  577. select ARCH_USES_GETTIMEOFFSET
  578. help
  579. Samsung S5P6442 CPU based systems
  580. config ARCH_S5PC100
  581. bool "Samsung S5PC100"
  582. select GENERIC_GPIO
  583. select HAVE_CLK
  584. select CPU_V7
  585. select ARM_L1_CACHE_SHIFT_6
  586. select ARCH_USES_GETTIMEOFFSET
  587. help
  588. Samsung S5PC100 series based systems
  589. config ARCH_S5PV210
  590. bool "Samsung S5PV210/S5PC110"
  591. select CPU_V7
  592. select GENERIC_GPIO
  593. select HAVE_CLK
  594. select ARM_L1_CACHE_SHIFT_6
  595. select ARCH_USES_GETTIMEOFFSET
  596. help
  597. Samsung S5PV210/S5PC110 series based systems
  598. config ARCH_SHARK
  599. bool "Shark"
  600. select CPU_SA110
  601. select ISA
  602. select ISA_DMA
  603. select ZONE_DMA
  604. select PCI
  605. select ARCH_USES_GETTIMEOFFSET
  606. help
  607. Support for the StrongARM based Digital DNARD machine, also known
  608. as "Shark" (<http://www.shark-linux.de/shark.html>).
  609. config ARCH_LH7A40X
  610. bool "Sharp LH7A40X"
  611. select CPU_ARM922T
  612. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  613. select ARCH_USES_GETTIMEOFFSET
  614. help
  615. Say Y here for systems based on one of the Sharp LH7A40X
  616. System on a Chip processors. These CPUs include an ARM922T
  617. core with a wide array of integrated devices for
  618. hand-held and low-power applications.
  619. config ARCH_U300
  620. bool "ST-Ericsson U300 Series"
  621. depends on MMU
  622. select CPU_ARM926T
  623. select HAVE_TCM
  624. select ARM_AMBA
  625. select ARM_VIC
  626. select GENERIC_CLOCKEVENTS
  627. select COMMON_CLKDEV
  628. select GENERIC_GPIO
  629. help
  630. Support for ST-Ericsson U300 series mobile platforms.
  631. config ARCH_U8500
  632. bool "ST-Ericsson U8500 Series"
  633. select CPU_V7
  634. select ARM_AMBA
  635. select GENERIC_CLOCKEVENTS
  636. select COMMON_CLKDEV
  637. select ARCH_REQUIRE_GPIOLIB
  638. help
  639. Support for ST-Ericsson's Ux500 architecture
  640. config ARCH_NOMADIK
  641. bool "STMicroelectronics Nomadik"
  642. select ARM_AMBA
  643. select ARM_VIC
  644. select CPU_ARM926T
  645. select COMMON_CLKDEV
  646. select GENERIC_CLOCKEVENTS
  647. select ARCH_REQUIRE_GPIOLIB
  648. help
  649. Support for the Nomadik platform by ST-Ericsson
  650. config ARCH_DAVINCI
  651. bool "TI DaVinci"
  652. select GENERIC_CLOCKEVENTS
  653. select ARCH_REQUIRE_GPIOLIB
  654. select ZONE_DMA
  655. select HAVE_IDE
  656. select COMMON_CLKDEV
  657. select GENERIC_ALLOCATOR
  658. select ARCH_HAS_HOLES_MEMORYMODEL
  659. help
  660. Support for TI's DaVinci platform.
  661. config ARCH_OMAP
  662. bool "TI OMAP"
  663. select HAVE_CLK
  664. select ARCH_REQUIRE_GPIOLIB
  665. select ARCH_HAS_CPUFREQ
  666. select GENERIC_CLOCKEVENTS
  667. select ARCH_HAS_HOLES_MEMORYMODEL
  668. help
  669. Support for TI's OMAP platform (OMAP1 and OMAP2).
  670. config PLAT_SPEAR
  671. bool "ST SPEAr"
  672. select ARM_AMBA
  673. select ARCH_REQUIRE_GPIOLIB
  674. select COMMON_CLKDEV
  675. select GENERIC_CLOCKEVENTS
  676. select HAVE_CLK
  677. help
  678. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  679. endchoice
  680. #
  681. # This is sorted alphabetically by mach-* pathname. However, plat-*
  682. # Kconfigs may be included either alphabetically (according to the
  683. # plat- suffix) or along side the corresponding mach-* source.
  684. #
  685. source "arch/arm/mach-aaec2000/Kconfig"
  686. source "arch/arm/mach-at91/Kconfig"
  687. source "arch/arm/mach-bcmring/Kconfig"
  688. source "arch/arm/mach-clps711x/Kconfig"
  689. source "arch/arm/mach-cns3xxx/Kconfig"
  690. source "arch/arm/mach-davinci/Kconfig"
  691. source "arch/arm/mach-dove/Kconfig"
  692. source "arch/arm/mach-ep93xx/Kconfig"
  693. source "arch/arm/mach-footbridge/Kconfig"
  694. source "arch/arm/mach-gemini/Kconfig"
  695. source "arch/arm/mach-h720x/Kconfig"
  696. source "arch/arm/mach-integrator/Kconfig"
  697. source "arch/arm/mach-iop32x/Kconfig"
  698. source "arch/arm/mach-iop33x/Kconfig"
  699. source "arch/arm/mach-iop13xx/Kconfig"
  700. source "arch/arm/mach-ixp4xx/Kconfig"
  701. source "arch/arm/mach-ixp2000/Kconfig"
  702. source "arch/arm/mach-ixp23xx/Kconfig"
  703. source "arch/arm/mach-kirkwood/Kconfig"
  704. source "arch/arm/mach-ks8695/Kconfig"
  705. source "arch/arm/mach-lh7a40x/Kconfig"
  706. source "arch/arm/mach-loki/Kconfig"
  707. source "arch/arm/mach-msm/Kconfig"
  708. source "arch/arm/mach-mv78xx0/Kconfig"
  709. source "arch/arm/plat-mxc/Kconfig"
  710. source "arch/arm/mach-netx/Kconfig"
  711. source "arch/arm/mach-nomadik/Kconfig"
  712. source "arch/arm/plat-nomadik/Kconfig"
  713. source "arch/arm/mach-ns9xxx/Kconfig"
  714. source "arch/arm/mach-nuc93x/Kconfig"
  715. source "arch/arm/plat-omap/Kconfig"
  716. source "arch/arm/mach-omap1/Kconfig"
  717. source "arch/arm/mach-omap2/Kconfig"
  718. source "arch/arm/mach-orion5x/Kconfig"
  719. source "arch/arm/mach-pxa/Kconfig"
  720. source "arch/arm/plat-pxa/Kconfig"
  721. source "arch/arm/mach-mmp/Kconfig"
  722. source "arch/arm/mach-realview/Kconfig"
  723. source "arch/arm/mach-sa1100/Kconfig"
  724. source "arch/arm/plat-samsung/Kconfig"
  725. source "arch/arm/plat-s3c24xx/Kconfig"
  726. source "arch/arm/plat-s5p/Kconfig"
  727. source "arch/arm/plat-spear/Kconfig"
  728. if ARCH_S3C2410
  729. source "arch/arm/mach-s3c2400/Kconfig"
  730. source "arch/arm/mach-s3c2410/Kconfig"
  731. source "arch/arm/mach-s3c2412/Kconfig"
  732. source "arch/arm/mach-s3c2416/Kconfig"
  733. source "arch/arm/mach-s3c2440/Kconfig"
  734. source "arch/arm/mach-s3c2443/Kconfig"
  735. endif
  736. if ARCH_S3C64XX
  737. source "arch/arm/mach-s3c64xx/Kconfig"
  738. endif
  739. source "arch/arm/mach-s5p6440/Kconfig"
  740. source "arch/arm/mach-s5p6442/Kconfig"
  741. source "arch/arm/mach-s5pc100/Kconfig"
  742. source "arch/arm/mach-s5pv210/Kconfig"
  743. source "arch/arm/mach-shmobile/Kconfig"
  744. source "arch/arm/plat-stmp3xxx/Kconfig"
  745. source "arch/arm/mach-u300/Kconfig"
  746. source "arch/arm/mach-ux500/Kconfig"
  747. source "arch/arm/mach-versatile/Kconfig"
  748. source "arch/arm/mach-vexpress/Kconfig"
  749. source "arch/arm/mach-w90x900/Kconfig"
  750. # Definitions to make life easier
  751. config ARCH_ACORN
  752. bool
  753. config PLAT_IOP
  754. bool
  755. select GENERIC_CLOCKEVENTS
  756. config PLAT_ORION
  757. bool
  758. config PLAT_PXA
  759. bool
  760. config PLAT_VERSATILE
  761. bool
  762. config ARM_TIMER_SP804
  763. bool
  764. source arch/arm/mm/Kconfig
  765. config IWMMXT
  766. bool "Enable iWMMXt support"
  767. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  768. default y if PXA27x || PXA3xx || ARCH_MMP
  769. help
  770. Enable support for iWMMXt context switching at run time if
  771. running on a CPU that supports it.
  772. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  773. config XSCALE_PMU
  774. bool
  775. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  776. default y
  777. config CPU_HAS_PMU
  778. depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
  779. (!ARCH_OMAP3 || OMAP3_EMU)
  780. default y
  781. bool
  782. if !MMU
  783. source "arch/arm/Kconfig-nommu"
  784. endif
  785. config ARM_ERRATA_411920
  786. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  787. depends on CPU_V6 && !SMP
  788. help
  789. Invalidation of the Instruction Cache operation can
  790. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  791. It does not affect the MPCore. This option enables the ARM Ltd.
  792. recommended workaround.
  793. config ARM_ERRATA_430973
  794. bool "ARM errata: Stale prediction on replaced interworking branch"
  795. depends on CPU_V7
  796. help
  797. This option enables the workaround for the 430973 Cortex-A8
  798. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  799. interworking branch is replaced with another code sequence at the
  800. same virtual address, whether due to self-modifying code or virtual
  801. to physical address re-mapping, Cortex-A8 does not recover from the
  802. stale interworking branch prediction. This results in Cortex-A8
  803. executing the new code sequence in the incorrect ARM or Thumb state.
  804. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  805. and also flushes the branch target cache at every context switch.
  806. Note that setting specific bits in the ACTLR register may not be
  807. available in non-secure mode.
  808. config ARM_ERRATA_458693
  809. bool "ARM errata: Processor deadlock when a false hazard is created"
  810. depends on CPU_V7
  811. help
  812. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  813. erratum. For very specific sequences of memory operations, it is
  814. possible for a hazard condition intended for a cache line to instead
  815. be incorrectly associated with a different cache line. This false
  816. hazard might then cause a processor deadlock. The workaround enables
  817. the L1 caching of the NEON accesses and disables the PLD instruction
  818. in the ACTLR register. Note that setting specific bits in the ACTLR
  819. register may not be available in non-secure mode.
  820. config ARM_ERRATA_460075
  821. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  822. depends on CPU_V7
  823. help
  824. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  825. erratum. Any asynchronous access to the L2 cache may encounter a
  826. situation in which recent store transactions to the L2 cache are lost
  827. and overwritten with stale memory contents from external memory. The
  828. workaround disables the write-allocate mode for the L2 cache via the
  829. ACTLR register. Note that setting specific bits in the ACTLR register
  830. may not be available in non-secure mode.
  831. config PL310_ERRATA_588369
  832. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  833. depends on CACHE_L2X0 && ARCH_OMAP4
  834. help
  835. The PL310 L2 cache controller implements three types of Clean &
  836. Invalidate maintenance operations: by Physical Address
  837. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  838. They are architecturally defined to behave as the execution of a
  839. clean operation followed immediately by an invalidate operation,
  840. both performing to the same memory location. This functionality
  841. is not correctly implemented in PL310 as clean lines are not
  842. invalidated as a result of these operations. Note that this errata
  843. uses Texas Instrument's secure monitor api.
  844. endmenu
  845. source "arch/arm/common/Kconfig"
  846. menu "Bus support"
  847. config ARM_AMBA
  848. bool
  849. config ISA
  850. bool
  851. help
  852. Find out whether you have ISA slots on your motherboard. ISA is the
  853. name of a bus system, i.e. the way the CPU talks to the other stuff
  854. inside your box. Other bus systems are PCI, EISA, MicroChannel
  855. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  856. newer boards don't support it. If you have ISA, say Y, otherwise N.
  857. # Select ISA DMA controller support
  858. config ISA_DMA
  859. bool
  860. select ISA_DMA_API
  861. # Select ISA DMA interface
  862. config ISA_DMA_API
  863. bool
  864. config PCI
  865. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  866. help
  867. Find out whether you have a PCI motherboard. PCI is the name of a
  868. bus system, i.e. the way the CPU talks to the other stuff inside
  869. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  870. VESA. If you have PCI, say Y, otherwise N.
  871. config PCI_DOMAINS
  872. bool
  873. depends on PCI
  874. config PCI_SYSCALL
  875. def_bool PCI
  876. # Select the host bridge type
  877. config PCI_HOST_VIA82C505
  878. bool
  879. depends on PCI && ARCH_SHARK
  880. default y
  881. config PCI_HOST_ITE8152
  882. bool
  883. depends on PCI && MACH_ARMCORE
  884. default y
  885. select DMABOUNCE
  886. source "drivers/pci/Kconfig"
  887. source "drivers/pcmcia/Kconfig"
  888. endmenu
  889. menu "Kernel Features"
  890. source "kernel/time/Kconfig"
  891. config SMP
  892. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  893. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  894. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
  895. ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  896. depends on GENERIC_CLOCKEVENTS
  897. select USE_GENERIC_SMP_HELPERS
  898. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  899. help
  900. This enables support for systems with more than one CPU. If you have
  901. a system with only one CPU, like most personal computers, say N. If
  902. you have a system with more than one CPU, say Y.
  903. If you say N here, the kernel will run on single and multiprocessor
  904. machines, but will use only one CPU of a multiprocessor machine. If
  905. you say Y here, the kernel will run on many, but not all, single
  906. processor machines. On a single processor machine, the kernel will
  907. run faster if you say N here.
  908. See also <file:Documentation/i386/IO-APIC.txt>,
  909. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  910. <http://www.linuxdoc.org/docs.html#howto>.
  911. If you don't know what to do here, say N.
  912. config HAVE_ARM_SCU
  913. bool
  914. depends on SMP
  915. help
  916. This option enables support for the ARM system coherency unit
  917. config HAVE_ARM_TWD
  918. bool
  919. depends on SMP
  920. help
  921. This options enables support for the ARM timer and watchdog unit
  922. choice
  923. prompt "Memory split"
  924. default VMSPLIT_3G
  925. help
  926. Select the desired split between kernel and user memory.
  927. If you are not absolutely sure what you are doing, leave this
  928. option alone!
  929. config VMSPLIT_3G
  930. bool "3G/1G user/kernel split"
  931. config VMSPLIT_2G
  932. bool "2G/2G user/kernel split"
  933. config VMSPLIT_1G
  934. bool "1G/3G user/kernel split"
  935. endchoice
  936. config PAGE_OFFSET
  937. hex
  938. default 0x40000000 if VMSPLIT_1G
  939. default 0x80000000 if VMSPLIT_2G
  940. default 0xC0000000
  941. config NR_CPUS
  942. int "Maximum number of CPUs (2-32)"
  943. range 2 32
  944. depends on SMP
  945. default "4"
  946. config HOTPLUG_CPU
  947. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  948. depends on SMP && HOTPLUG && EXPERIMENTAL
  949. help
  950. Say Y here to experiment with turning CPUs off and on. CPUs
  951. can be controlled through /sys/devices/system/cpu.
  952. config LOCAL_TIMERS
  953. bool "Use local timer interrupts"
  954. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  955. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  956. ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  957. default y
  958. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_VEXPRESS || ARCH_OMAP4 || ARCH_U8500)
  959. help
  960. Enable support for local timers on SMP platforms, rather then the
  961. legacy IPI broadcast method. Local timers allows the system
  962. accounting to be spread across the timer interval, preventing a
  963. "thundering herd" at every timer tick.
  964. source kernel/Kconfig.preempt
  965. config HZ
  966. int
  967. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
  968. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  969. default AT91_TIMER_HZ if ARCH_AT91
  970. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  971. default 100
  972. config THUMB2_KERNEL
  973. bool "Compile the kernel in Thumb-2 mode"
  974. depends on CPU_V7 && EXPERIMENTAL
  975. select AEABI
  976. select ARM_ASM_UNIFIED
  977. help
  978. By enabling this option, the kernel will be compiled in
  979. Thumb-2 mode. A compiler/assembler that understand the unified
  980. ARM-Thumb syntax is needed.
  981. If unsure, say N.
  982. config ARM_ASM_UNIFIED
  983. bool
  984. config AEABI
  985. bool "Use the ARM EABI to compile the kernel"
  986. help
  987. This option allows for the kernel to be compiled using the latest
  988. ARM ABI (aka EABI). This is only useful if you are using a user
  989. space environment that is also compiled with EABI.
  990. Since there are major incompatibilities between the legacy ABI and
  991. EABI, especially with regard to structure member alignment, this
  992. option also changes the kernel syscall calling convention to
  993. disambiguate both ABIs and allow for backward compatibility support
  994. (selected with CONFIG_OABI_COMPAT).
  995. To use this you need GCC version 4.0.0 or later.
  996. config OABI_COMPAT
  997. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  998. depends on AEABI && EXPERIMENTAL
  999. default y
  1000. help
  1001. This option preserves the old syscall interface along with the
  1002. new (ARM EABI) one. It also provides a compatibility layer to
  1003. intercept syscalls that have structure arguments which layout
  1004. in memory differs between the legacy ABI and the new ARM EABI
  1005. (only for non "thumb" binaries). This option adds a tiny
  1006. overhead to all syscalls and produces a slightly larger kernel.
  1007. If you know you'll be using only pure EABI user space then you
  1008. can say N here. If this option is not selected and you attempt
  1009. to execute a legacy ABI binary then the result will be
  1010. UNPREDICTABLE (in fact it can be predicted that it won't work
  1011. at all). If in doubt say Y.
  1012. config ARCH_HAS_HOLES_MEMORYMODEL
  1013. bool
  1014. config ARCH_SPARSEMEM_ENABLE
  1015. bool
  1016. config ARCH_SPARSEMEM_DEFAULT
  1017. def_bool ARCH_SPARSEMEM_ENABLE
  1018. config ARCH_SELECT_MEMORY_MODEL
  1019. def_bool ARCH_SPARSEMEM_ENABLE
  1020. config HIGHMEM
  1021. bool "High Memory Support (EXPERIMENTAL)"
  1022. depends on MMU && EXPERIMENTAL
  1023. help
  1024. The address space of ARM processors is only 4 Gigabytes large
  1025. and it has to accommodate user address space, kernel address
  1026. space as well as some memory mapped IO. That means that, if you
  1027. have a large amount of physical memory and/or IO, not all of the
  1028. memory can be "permanently mapped" by the kernel. The physical
  1029. memory that is not permanently mapped is called "high memory".
  1030. Depending on the selected kernel/user memory split, minimum
  1031. vmalloc space and actual amount of RAM, you may not need this
  1032. option which should result in a slightly faster kernel.
  1033. If unsure, say n.
  1034. config HIGHPTE
  1035. bool "Allocate 2nd-level pagetables from highmem"
  1036. depends on HIGHMEM
  1037. depends on !OUTER_CACHE
  1038. config HW_PERF_EVENTS
  1039. bool "Enable hardware performance counter support for perf events"
  1040. depends on PERF_EVENTS && CPU_HAS_PMU
  1041. default y
  1042. help
  1043. Enable hardware performance counter support for perf events. If
  1044. disabled, perf events will use software events only.
  1045. config SPARSE_IRQ
  1046. def_bool n
  1047. help
  1048. This enables support for sparse irqs. This is useful in general
  1049. as most CPUs have a fairly sparse array of IRQ vectors, which
  1050. the irq_desc then maps directly on to. Systems with a high
  1051. number of off-chip IRQs will want to treat this as
  1052. experimental until they have been independently verified.
  1053. source "mm/Kconfig"
  1054. config FORCE_MAX_ZONEORDER
  1055. int "Maximum zone order" if ARCH_SHMOBILE
  1056. range 11 64 if ARCH_SHMOBILE
  1057. default "9" if SA1111
  1058. default "11"
  1059. help
  1060. The kernel memory allocator divides physically contiguous memory
  1061. blocks into "zones", where each zone is a power of two number of
  1062. pages. This option selects the largest power of two that the kernel
  1063. keeps in the memory allocator. If you need to allocate very large
  1064. blocks of physically contiguous memory, then you may need to
  1065. increase this value.
  1066. This config option is actually maximum order plus one. For example,
  1067. a value of 11 means that the largest free memory block is 2^10 pages.
  1068. config LEDS
  1069. bool "Timer and CPU usage LEDs"
  1070. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1071. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1072. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1073. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1074. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1075. ARCH_AT91 || ARCH_DAVINCI || \
  1076. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1077. help
  1078. If you say Y here, the LEDs on your machine will be used
  1079. to provide useful information about your current system status.
  1080. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1081. be able to select which LEDs are active using the options below. If
  1082. you are compiling a kernel for the EBSA-110 or the LART however, the
  1083. red LED will simply flash regularly to indicate that the system is
  1084. still functional. It is safe to say Y here if you have a CATS
  1085. system, but the driver will do nothing.
  1086. config LEDS_TIMER
  1087. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1088. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1089. || MACH_OMAP_PERSEUS2
  1090. depends on LEDS
  1091. depends on !GENERIC_CLOCKEVENTS
  1092. default y if ARCH_EBSA110
  1093. help
  1094. If you say Y here, one of the system LEDs (the green one on the
  1095. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1096. will flash regularly to indicate that the system is still
  1097. operational. This is mainly useful to kernel hackers who are
  1098. debugging unstable kernels.
  1099. The LART uses the same LED for both Timer LED and CPU usage LED
  1100. functions. You may choose to use both, but the Timer LED function
  1101. will overrule the CPU usage LED.
  1102. config LEDS_CPU
  1103. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1104. !ARCH_OMAP) \
  1105. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1106. || MACH_OMAP_PERSEUS2
  1107. depends on LEDS
  1108. help
  1109. If you say Y here, the red LED will be used to give a good real
  1110. time indication of CPU usage, by lighting whenever the idle task
  1111. is not currently executing.
  1112. The LART uses the same LED for both Timer LED and CPU usage LED
  1113. functions. You may choose to use both, but the Timer LED function
  1114. will overrule the CPU usage LED.
  1115. config ALIGNMENT_TRAP
  1116. bool
  1117. depends on CPU_CP15_MMU
  1118. default y if !ARCH_EBSA110
  1119. select HAVE_PROC_CPU if PROC_FS
  1120. help
  1121. ARM processors cannot fetch/store information which is not
  1122. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1123. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1124. fetch/store instructions will be emulated in software if you say
  1125. here, which has a severe performance impact. This is necessary for
  1126. correct operation of some network protocols. With an IP-only
  1127. configuration it is safe to say N, otherwise say Y.
  1128. config UACCESS_WITH_MEMCPY
  1129. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1130. depends on MMU && EXPERIMENTAL
  1131. default y if CPU_FEROCEON
  1132. help
  1133. Implement faster copy_to_user and clear_user methods for CPU
  1134. cores where a 8-word STM instruction give significantly higher
  1135. memory write throughput than a sequence of individual 32bit stores.
  1136. A possible side effect is a slight increase in scheduling latency
  1137. between threads sharing the same address space if they invoke
  1138. such copy operations with large buffers.
  1139. However, if the CPU data cache is using a write-allocate mode,
  1140. this option is unlikely to provide any performance gain.
  1141. endmenu
  1142. menu "Boot options"
  1143. # Compressed boot loader in ROM. Yes, we really want to ask about
  1144. # TEXT and BSS so we preserve their values in the config files.
  1145. config ZBOOT_ROM_TEXT
  1146. hex "Compressed ROM boot loader base address"
  1147. default "0"
  1148. help
  1149. The physical address at which the ROM-able zImage is to be
  1150. placed in the target. Platforms which normally make use of
  1151. ROM-able zImage formats normally set this to a suitable
  1152. value in their defconfig file.
  1153. If ZBOOT_ROM is not enabled, this has no effect.
  1154. config ZBOOT_ROM_BSS
  1155. hex "Compressed ROM boot loader BSS address"
  1156. default "0"
  1157. help
  1158. The base address of an area of read/write memory in the target
  1159. for the ROM-able zImage which must be available while the
  1160. decompressor is running. It must be large enough to hold the
  1161. entire decompressed kernel plus an additional 128 KiB.
  1162. Platforms which normally make use of ROM-able zImage formats
  1163. normally set this to a suitable value in their defconfig file.
  1164. If ZBOOT_ROM is not enabled, this has no effect.
  1165. config ZBOOT_ROM
  1166. bool "Compressed boot loader in ROM/flash"
  1167. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1168. help
  1169. Say Y here if you intend to execute your compressed kernel image
  1170. (zImage) directly from ROM or flash. If unsure, say N.
  1171. config CMDLINE
  1172. string "Default kernel command string"
  1173. default ""
  1174. help
  1175. On some architectures (EBSA110 and CATS), there is currently no way
  1176. for the boot loader to pass arguments to the kernel. For these
  1177. architectures, you should supply some command-line options at build
  1178. time by entering them here. As a minimum, you should specify the
  1179. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1180. config CMDLINE_FORCE
  1181. bool "Always use the default kernel command string"
  1182. depends on CMDLINE != ""
  1183. help
  1184. Always use the default kernel command string, even if the boot
  1185. loader passes other arguments to the kernel.
  1186. This is useful if you cannot or don't want to change the
  1187. command-line options your boot loader passes to the kernel.
  1188. If unsure, say N.
  1189. config XIP_KERNEL
  1190. bool "Kernel Execute-In-Place from ROM"
  1191. depends on !ZBOOT_ROM
  1192. help
  1193. Execute-In-Place allows the kernel to run from non-volatile storage
  1194. directly addressable by the CPU, such as NOR flash. This saves RAM
  1195. space since the text section of the kernel is not loaded from flash
  1196. to RAM. Read-write sections, such as the data section and stack,
  1197. are still copied to RAM. The XIP kernel is not compressed since
  1198. it has to run directly from flash, so it will take more space to
  1199. store it. The flash address used to link the kernel object files,
  1200. and for storing it, is configuration dependent. Therefore, if you
  1201. say Y here, you must know the proper physical address where to
  1202. store the kernel image depending on your own flash memory usage.
  1203. Also note that the make target becomes "make xipImage" rather than
  1204. "make zImage" or "make Image". The final kernel binary to put in
  1205. ROM memory will be arch/arm/boot/xipImage.
  1206. If unsure, say N.
  1207. config XIP_PHYS_ADDR
  1208. hex "XIP Kernel Physical Location"
  1209. depends on XIP_KERNEL
  1210. default "0x00080000"
  1211. help
  1212. This is the physical address in your flash memory the kernel will
  1213. be linked for and stored to. This address is dependent on your
  1214. own flash usage.
  1215. config KEXEC
  1216. bool "Kexec system call (EXPERIMENTAL)"
  1217. depends on EXPERIMENTAL
  1218. help
  1219. kexec is a system call that implements the ability to shutdown your
  1220. current kernel, and to start another kernel. It is like a reboot
  1221. but it is independent of the system firmware. And like a reboot
  1222. you can start any kernel with it, not just Linux.
  1223. It is an ongoing process to be certain the hardware in a machine
  1224. is properly shutdown, so do not be surprised if this code does not
  1225. initially work for you. It may help to enable device hotplugging
  1226. support.
  1227. config ATAGS_PROC
  1228. bool "Export atags in procfs"
  1229. depends on KEXEC
  1230. default y
  1231. help
  1232. Should the atags used to boot the kernel be exported in an "atags"
  1233. file in procfs. Useful with kexec.
  1234. endmenu
  1235. menu "CPU Power Management"
  1236. if ARCH_HAS_CPUFREQ
  1237. source "drivers/cpufreq/Kconfig"
  1238. config CPU_FREQ_SA1100
  1239. bool
  1240. config CPU_FREQ_SA1110
  1241. bool
  1242. config CPU_FREQ_INTEGRATOR
  1243. tristate "CPUfreq driver for ARM Integrator CPUs"
  1244. depends on ARCH_INTEGRATOR && CPU_FREQ
  1245. default y
  1246. help
  1247. This enables the CPUfreq driver for ARM Integrator CPUs.
  1248. For details, take a look at <file:Documentation/cpu-freq>.
  1249. If in doubt, say Y.
  1250. config CPU_FREQ_PXA
  1251. bool
  1252. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1253. default y
  1254. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1255. config CPU_FREQ_S3C64XX
  1256. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1257. depends on CPU_FREQ && CPU_S3C6410
  1258. config CPU_FREQ_S3C
  1259. bool
  1260. help
  1261. Internal configuration node for common cpufreq on Samsung SoC
  1262. config CPU_FREQ_S3C24XX
  1263. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1264. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1265. select CPU_FREQ_S3C
  1266. help
  1267. This enables the CPUfreq driver for the Samsung S3C24XX family
  1268. of CPUs.
  1269. For details, take a look at <file:Documentation/cpu-freq>.
  1270. If in doubt, say N.
  1271. config CPU_FREQ_S3C24XX_PLL
  1272. bool "Support CPUfreq changing of PLL frequency"
  1273. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1274. help
  1275. Compile in support for changing the PLL frequency from the
  1276. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1277. after a frequency change, so by default it is not enabled.
  1278. This also means that the PLL tables for the selected CPU(s) will
  1279. be built which may increase the size of the kernel image.
  1280. config CPU_FREQ_S3C24XX_DEBUG
  1281. bool "Debug CPUfreq Samsung driver core"
  1282. depends on CPU_FREQ_S3C24XX
  1283. help
  1284. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1285. config CPU_FREQ_S3C24XX_IODEBUG
  1286. bool "Debug CPUfreq Samsung driver IO timing"
  1287. depends on CPU_FREQ_S3C24XX
  1288. help
  1289. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1290. config CPU_FREQ_S3C24XX_DEBUGFS
  1291. bool "Export debugfs for CPUFreq"
  1292. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1293. help
  1294. Export status information via debugfs.
  1295. endif
  1296. source "drivers/cpuidle/Kconfig"
  1297. endmenu
  1298. menu "Floating point emulation"
  1299. comment "At least one emulation must be selected"
  1300. config FPE_NWFPE
  1301. bool "NWFPE math emulation"
  1302. depends on !AEABI || OABI_COMPAT
  1303. ---help---
  1304. Say Y to include the NWFPE floating point emulator in the kernel.
  1305. This is necessary to run most binaries. Linux does not currently
  1306. support floating point hardware so you need to say Y here even if
  1307. your machine has an FPA or floating point co-processor podule.
  1308. You may say N here if you are going to load the Acorn FPEmulator
  1309. early in the bootup.
  1310. config FPE_NWFPE_XP
  1311. bool "Support extended precision"
  1312. depends on FPE_NWFPE
  1313. help
  1314. Say Y to include 80-bit support in the kernel floating-point
  1315. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1316. Note that gcc does not generate 80-bit operations by default,
  1317. so in most cases this option only enlarges the size of the
  1318. floating point emulator without any good reason.
  1319. You almost surely want to say N here.
  1320. config FPE_FASTFPE
  1321. bool "FastFPE math emulation (EXPERIMENTAL)"
  1322. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1323. ---help---
  1324. Say Y here to include the FAST floating point emulator in the kernel.
  1325. This is an experimental much faster emulator which now also has full
  1326. precision for the mantissa. It does not support any exceptions.
  1327. It is very simple, and approximately 3-6 times faster than NWFPE.
  1328. It should be sufficient for most programs. It may be not suitable
  1329. for scientific calculations, but you have to check this for yourself.
  1330. If you do not feel you need a faster FP emulation you should better
  1331. choose NWFPE.
  1332. config VFP
  1333. bool "VFP-format floating point maths"
  1334. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1335. help
  1336. Say Y to include VFP support code in the kernel. This is needed
  1337. if your hardware includes a VFP unit.
  1338. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1339. release notes and additional status information.
  1340. Say N if your target does not have VFP hardware.
  1341. config VFPv3
  1342. bool
  1343. depends on VFP
  1344. default y if CPU_V7
  1345. config NEON
  1346. bool "Advanced SIMD (NEON) Extension support"
  1347. depends on VFPv3 && CPU_V7
  1348. help
  1349. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1350. Extension.
  1351. endmenu
  1352. menu "Userspace binary formats"
  1353. source "fs/Kconfig.binfmt"
  1354. config ARTHUR
  1355. tristate "RISC OS personality"
  1356. depends on !AEABI
  1357. help
  1358. Say Y here to include the kernel code necessary if you want to run
  1359. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1360. experimental; if this sounds frightening, say N and sleep in peace.
  1361. You can also say M here to compile this support as a module (which
  1362. will be called arthur).
  1363. endmenu
  1364. menu "Power management options"
  1365. source "kernel/power/Kconfig"
  1366. config ARCH_SUSPEND_POSSIBLE
  1367. def_bool y
  1368. endmenu
  1369. source "net/Kconfig"
  1370. source "drivers/Kconfig"
  1371. source "fs/Kconfig"
  1372. source "arch/arm/Kconfig.debug"
  1373. source "security/Kconfig"
  1374. source "crypto/Kconfig"
  1375. source "lib/Kconfig"