Kconfig 49 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 ARCH_USES_GETTIMEOFFSET
  41. bool
  42. default n
  43. config GENERIC_CLOCKEVENTS
  44. bool
  45. config GENERIC_CLOCKEVENTS_BROADCAST
  46. bool
  47. depends on GENERIC_CLOCKEVENTS
  48. default y if SMP
  49. config HAVE_TCM
  50. bool
  51. select GENERIC_ALLOCATOR
  52. config HAVE_PROC_CPU
  53. bool
  54. config NO_IOPORT
  55. bool
  56. config EISA
  57. bool
  58. ---help---
  59. The Extended Industry Standard Architecture (EISA) bus was
  60. developed as an open alternative to the IBM MicroChannel bus.
  61. The EISA bus provided some of the features of the IBM MicroChannel
  62. bus while maintaining backward compatibility with cards made for
  63. the older ISA bus. The EISA bus saw limited use between 1988 and
  64. 1995 when it was made obsolete by the PCI bus.
  65. Say Y here if you are building a kernel for an EISA-based machine.
  66. Otherwise, say N.
  67. config SBUS
  68. bool
  69. config MCA
  70. bool
  71. help
  72. MicroChannel Architecture is found in some IBM PS/2 machines and
  73. laptops. It is a bus system similar to PCI or ISA. See
  74. <file:Documentation/mca.txt> (and especially the web page given
  75. there) before attempting to build an MCA bus kernel.
  76. config GENERIC_HARDIRQS
  77. bool
  78. default y
  79. config STACKTRACE_SUPPORT
  80. bool
  81. default y
  82. config HAVE_LATENCYTOP_SUPPORT
  83. bool
  84. depends on !SMP
  85. default y
  86. config LOCKDEP_SUPPORT
  87. bool
  88. default y
  89. config TRACE_IRQFLAGS_SUPPORT
  90. bool
  91. default y
  92. config HARDIRQS_SW_RESEND
  93. bool
  94. default y
  95. config GENERIC_IRQ_PROBE
  96. bool
  97. default y
  98. config GENERIC_LOCKBREAK
  99. bool
  100. default y
  101. depends on SMP && PREEMPT
  102. config RWSEM_GENERIC_SPINLOCK
  103. bool
  104. default y
  105. config RWSEM_XCHGADD_ALGORITHM
  106. bool
  107. config ARCH_HAS_ILOG2_U32
  108. bool
  109. config ARCH_HAS_ILOG2_U64
  110. bool
  111. config ARCH_HAS_CPUFREQ
  112. bool
  113. help
  114. Internal node to signify that the ARCH has CPUFREQ support
  115. and that the relevant menu configurations are displayed for
  116. it.
  117. config GENERIC_HWEIGHT
  118. bool
  119. default y
  120. config GENERIC_CALIBRATE_DELAY
  121. bool
  122. default y
  123. config ARCH_MAY_HAVE_PC_FDC
  124. bool
  125. config ZONE_DMA
  126. bool
  127. config NEED_DMA_MAP_STATE
  128. def_bool y
  129. config GENERIC_ISA_DMA
  130. bool
  131. config FIQ
  132. bool
  133. config ARCH_MTD_XIP
  134. bool
  135. config GENERIC_HARDIRQS_NO__DO_IRQ
  136. def_bool y
  137. config ARM_L1_CACHE_SHIFT_6
  138. bool
  139. help
  140. Setting ARM L1 cache line size to 64 Bytes.
  141. config VECTORS_BASE
  142. hex
  143. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  144. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  145. default 0x00000000
  146. help
  147. The base address of exception vectors.
  148. source "init/Kconfig"
  149. source "kernel/Kconfig.freezer"
  150. menu "System Type"
  151. config MMU
  152. bool "MMU-based Paged Memory Management Support"
  153. default y
  154. help
  155. Select if you want MMU-based virtualised addressing space
  156. support by paged memory management. If unsure, say 'Y'.
  157. #
  158. # The "ARM system type" choice list is ordered alphabetically by option
  159. # text. Please add new entries in the option alphabetic order.
  160. #
  161. choice
  162. prompt "ARM system type"
  163. default ARCH_VERSATILE
  164. config ARCH_AAEC2000
  165. bool "Agilent AAEC-2000 based"
  166. select CPU_ARM920T
  167. select ARM_AMBA
  168. select HAVE_CLK
  169. select ARCH_USES_GETTIMEOFFSET
  170. help
  171. This enables support for systems based on the Agilent AAEC-2000
  172. config ARCH_INTEGRATOR
  173. bool "ARM Ltd. Integrator family"
  174. select ARM_AMBA
  175. select ARCH_HAS_CPUFREQ
  176. select COMMON_CLKDEV
  177. select ICST
  178. select GENERIC_CLOCKEVENTS
  179. select PLAT_VERSATILE
  180. help
  181. Support for ARM's Integrator platform.
  182. config ARCH_REALVIEW
  183. bool "ARM Ltd. RealView family"
  184. select ARM_AMBA
  185. select COMMON_CLKDEV
  186. select ICST
  187. select GENERIC_CLOCKEVENTS
  188. select ARCH_WANT_OPTIONAL_GPIOLIB
  189. select PLAT_VERSATILE
  190. select ARM_TIMER_SP804
  191. select GPIO_PL061 if GPIOLIB
  192. help
  193. This enables support for ARM Ltd RealView boards.
  194. config ARCH_VERSATILE
  195. bool "ARM Ltd. Versatile family"
  196. select ARM_AMBA
  197. select ARM_VIC
  198. select COMMON_CLKDEV
  199. select ICST
  200. select GENERIC_CLOCKEVENTS
  201. select ARCH_WANT_OPTIONAL_GPIOLIB
  202. select PLAT_VERSATILE
  203. select ARM_TIMER_SP804
  204. help
  205. This enables support for ARM Ltd Versatile board.
  206. config ARCH_VEXPRESS
  207. bool "ARM Ltd. Versatile Express family"
  208. select ARCH_WANT_OPTIONAL_GPIOLIB
  209. select ARM_AMBA
  210. select ARM_TIMER_SP804
  211. select COMMON_CLKDEV
  212. select GENERIC_CLOCKEVENTS
  213. select HAVE_CLK
  214. select ICST
  215. select PLAT_VERSATILE
  216. help
  217. This enables support for the ARM Ltd Versatile Express boards.
  218. config ARCH_AT91
  219. bool "Atmel AT91"
  220. select ARCH_REQUIRE_GPIOLIB
  221. select HAVE_CLK
  222. help
  223. This enables support for systems based on the Atmel AT91RM9200,
  224. AT91SAM9 and AT91CAP9 processors.
  225. config ARCH_BCMRING
  226. bool "Broadcom BCMRING"
  227. depends on MMU
  228. select CPU_V6
  229. select ARM_AMBA
  230. select COMMON_CLKDEV
  231. select GENERIC_CLOCKEVENTS
  232. select ARCH_WANT_OPTIONAL_GPIOLIB
  233. help
  234. Support for Broadcom's BCMRing platform.
  235. config ARCH_CLPS711X
  236. bool "Cirrus Logic CLPS711x/EP721x-based"
  237. select CPU_ARM720T
  238. select ARCH_USES_GETTIMEOFFSET
  239. help
  240. Support for Cirrus Logic 711x/721x based boards.
  241. config ARCH_CNS3XXX
  242. bool "Cavium Networks CNS3XXX family"
  243. select CPU_V6
  244. select GENERIC_CLOCKEVENTS
  245. select ARM_GIC
  246. select PCI_DOMAINS if PCI
  247. help
  248. Support for Cavium Networks CNS3XXX platform.
  249. config ARCH_GEMINI
  250. bool "Cortina Systems Gemini"
  251. select CPU_FA526
  252. select ARCH_REQUIRE_GPIOLIB
  253. select ARCH_USES_GETTIMEOFFSET
  254. help
  255. Support for the Cortina Systems Gemini family SoCs
  256. config ARCH_EBSA110
  257. bool "EBSA-110"
  258. select CPU_SA110
  259. select ISA
  260. select NO_IOPORT
  261. select ARCH_USES_GETTIMEOFFSET
  262. help
  263. This is an evaluation board for the StrongARM processor available
  264. from Digital. It has limited hardware on-board, including an
  265. Ethernet interface, two PCMCIA sockets, two serial ports and a
  266. parallel port.
  267. config ARCH_EP93XX
  268. bool "EP93xx-based"
  269. select CPU_ARM920T
  270. select ARM_AMBA
  271. select ARM_VIC
  272. select COMMON_CLKDEV
  273. select ARCH_REQUIRE_GPIOLIB
  274. select ARCH_HAS_HOLES_MEMORYMODEL
  275. select ARCH_USES_GETTIMEOFFSET
  276. help
  277. This enables support for the Cirrus EP93xx series of CPUs.
  278. config ARCH_FOOTBRIDGE
  279. bool "FootBridge"
  280. select CPU_SA110
  281. select FOOTBRIDGE
  282. select ARCH_USES_GETTIMEOFFSET
  283. help
  284. Support for systems based on the DC21285 companion chip
  285. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  286. config ARCH_MXC
  287. bool "Freescale MXC/iMX-based"
  288. select GENERIC_CLOCKEVENTS
  289. select ARCH_REQUIRE_GPIOLIB
  290. select COMMON_CLKDEV
  291. help
  292. Support for Freescale MXC/iMX-based family of processors
  293. config ARCH_STMP3XXX
  294. bool "Freescale STMP3xxx"
  295. select CPU_ARM926T
  296. select COMMON_CLKDEV
  297. select ARCH_REQUIRE_GPIOLIB
  298. select GENERIC_CLOCKEVENTS
  299. select USB_ARCH_HAS_EHCI
  300. help
  301. Support for systems based on the Freescale 3xxx CPUs.
  302. config ARCH_NETX
  303. bool "Hilscher NetX based"
  304. select CPU_ARM926T
  305. select ARM_VIC
  306. select GENERIC_CLOCKEVENTS
  307. help
  308. This enables support for systems based on the Hilscher NetX Soc
  309. config ARCH_H720X
  310. bool "Hynix HMS720x-based"
  311. select CPU_ARM720T
  312. select ISA_DMA_API
  313. select ARCH_USES_GETTIMEOFFSET
  314. help
  315. This enables support for systems based on the Hynix HMS720x
  316. config ARCH_IOP13XX
  317. bool "IOP13xx-based"
  318. depends on MMU
  319. select CPU_XSC3
  320. select PLAT_IOP
  321. select PCI
  322. select ARCH_SUPPORTS_MSI
  323. select VMSPLIT_1G
  324. help
  325. Support for Intel's IOP13XX (XScale) family of processors.
  326. config ARCH_IOP32X
  327. bool "IOP32x-based"
  328. depends on MMU
  329. select CPU_XSCALE
  330. select PLAT_IOP
  331. select PCI
  332. select ARCH_REQUIRE_GPIOLIB
  333. help
  334. Support for Intel's 80219 and IOP32X (XScale) family of
  335. processors.
  336. config ARCH_IOP33X
  337. bool "IOP33x-based"
  338. depends on MMU
  339. select CPU_XSCALE
  340. select PLAT_IOP
  341. select PCI
  342. select ARCH_REQUIRE_GPIOLIB
  343. help
  344. Support for Intel's IOP33X (XScale) family of processors.
  345. config ARCH_IXP23XX
  346. bool "IXP23XX-based"
  347. depends on MMU
  348. select CPU_XSC3
  349. select PCI
  350. select ARCH_USES_GETTIMEOFFSET
  351. help
  352. Support for Intel's IXP23xx (XScale) family of processors.
  353. config ARCH_IXP2000
  354. bool "IXP2400/2800-based"
  355. depends on MMU
  356. select CPU_XSCALE
  357. select PCI
  358. select ARCH_USES_GETTIMEOFFSET
  359. help
  360. Support for Intel's IXP2400/2800 (XScale) family of processors.
  361. config ARCH_IXP4XX
  362. bool "IXP4xx-based"
  363. depends on MMU
  364. select CPU_XSCALE
  365. select GENERIC_GPIO
  366. select GENERIC_CLOCKEVENTS
  367. select DMABOUNCE if PCI
  368. help
  369. Support for Intel's IXP4XX (XScale) family of processors.
  370. config ARCH_DOVE
  371. bool "Marvell Dove"
  372. select PCI
  373. select ARCH_REQUIRE_GPIOLIB
  374. select GENERIC_CLOCKEVENTS
  375. select PLAT_ORION
  376. help
  377. Support for the Marvell Dove SoC 88AP510
  378. config ARCH_KIRKWOOD
  379. bool "Marvell Kirkwood"
  380. select CPU_FEROCEON
  381. select PCI
  382. select ARCH_REQUIRE_GPIOLIB
  383. select GENERIC_CLOCKEVENTS
  384. select PLAT_ORION
  385. help
  386. Support for the following Marvell Kirkwood series SoCs:
  387. 88F6180, 88F6192 and 88F6281.
  388. config ARCH_LOKI
  389. bool "Marvell Loki (88RC8480)"
  390. select CPU_FEROCEON
  391. select GENERIC_CLOCKEVENTS
  392. select PLAT_ORION
  393. help
  394. Support for the Marvell Loki (88RC8480) SoC.
  395. config ARCH_LPC32XX
  396. bool "NXP LPC32XX"
  397. select CPU_ARM926T
  398. select ARCH_REQUIRE_GPIOLIB
  399. select HAVE_IDE
  400. select ARM_AMBA
  401. select USB_ARCH_HAS_OHCI
  402. select COMMON_CLKDEV
  403. select GENERIC_TIME
  404. select GENERIC_CLOCKEVENTS
  405. help
  406. Support for the NXP LPC32XX family of processors
  407. config ARCH_MV78XX0
  408. bool "Marvell MV78xx0"
  409. select CPU_FEROCEON
  410. select PCI
  411. select ARCH_REQUIRE_GPIOLIB
  412. select GENERIC_CLOCKEVENTS
  413. select PLAT_ORION
  414. help
  415. Support for the following Marvell MV78xx0 series SoCs:
  416. MV781x0, MV782x0.
  417. config ARCH_ORION5X
  418. bool "Marvell Orion"
  419. depends on MMU
  420. select CPU_FEROCEON
  421. select PCI
  422. select ARCH_REQUIRE_GPIOLIB
  423. select GENERIC_CLOCKEVENTS
  424. select PLAT_ORION
  425. help
  426. Support for the following Marvell Orion 5x series SoCs:
  427. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  428. Orion-2 (5281), Orion-1-90 (6183).
  429. config ARCH_MMP
  430. bool "Marvell PXA168/910/MMP2"
  431. depends on MMU
  432. select ARCH_REQUIRE_GPIOLIB
  433. select COMMON_CLKDEV
  434. select GENERIC_CLOCKEVENTS
  435. select TICK_ONESHOT
  436. select PLAT_PXA
  437. help
  438. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  439. config ARCH_KS8695
  440. bool "Micrel/Kendin KS8695"
  441. select CPU_ARM922T
  442. select ARCH_REQUIRE_GPIOLIB
  443. select ARCH_USES_GETTIMEOFFSET
  444. help
  445. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  446. System-on-Chip devices.
  447. config ARCH_NS9XXX
  448. bool "NetSilicon NS9xxx"
  449. select CPU_ARM926T
  450. select GENERIC_GPIO
  451. select GENERIC_CLOCKEVENTS
  452. select HAVE_CLK
  453. help
  454. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  455. System.
  456. <http://www.digi.com/products/microprocessors/index.jsp>
  457. config ARCH_W90X900
  458. bool "Nuvoton W90X900 CPU"
  459. select CPU_ARM926T
  460. select ARCH_REQUIRE_GPIOLIB
  461. select COMMON_CLKDEV
  462. select GENERIC_CLOCKEVENTS
  463. help
  464. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  465. At present, the w90x900 has been renamed nuc900, regarding
  466. the ARM series product line, you can login the following
  467. link address to know more.
  468. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  469. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  470. config ARCH_NUC93X
  471. bool "Nuvoton NUC93X CPU"
  472. select CPU_ARM926T
  473. select COMMON_CLKDEV
  474. help
  475. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  476. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  477. config ARCH_TEGRA
  478. bool "NVIDIA Tegra"
  479. select GENERIC_TIME
  480. select GENERIC_CLOCKEVENTS
  481. select GENERIC_GPIO
  482. select HAVE_CLK
  483. select COMMON_CLKDEV
  484. select ARCH_HAS_BARRIERS if CACHE_L2X0
  485. help
  486. This enables support for NVIDIA Tegra based systems (Tegra APX,
  487. Tegra 6xx and Tegra 2 series).
  488. config ARCH_PNX4008
  489. bool "Philips Nexperia PNX4008 Mobile"
  490. select CPU_ARM926T
  491. select COMMON_CLKDEV
  492. select ARCH_USES_GETTIMEOFFSET
  493. help
  494. This enables support for Philips PNX4008 mobile platform.
  495. config ARCH_PXA
  496. bool "PXA2xx/PXA3xx-based"
  497. depends on MMU
  498. select ARCH_MTD_XIP
  499. select ARCH_HAS_CPUFREQ
  500. select COMMON_CLKDEV
  501. select ARCH_REQUIRE_GPIOLIB
  502. select GENERIC_CLOCKEVENTS
  503. select TICK_ONESHOT
  504. select PLAT_PXA
  505. help
  506. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  507. config ARCH_MSM
  508. bool "Qualcomm MSM"
  509. select HAVE_CLK
  510. select GENERIC_CLOCKEVENTS
  511. select ARCH_REQUIRE_GPIOLIB
  512. help
  513. Support for Qualcomm MSM/QSD based systems. This runs on the
  514. apps processor of the MSM/QSD and depends on a shared memory
  515. interface to the modem processor which runs the baseband
  516. stack and controls some vital subsystems
  517. (clock and power control, etc).
  518. config ARCH_SHMOBILE
  519. bool "Renesas SH-Mobile"
  520. help
  521. Support for Renesas's SH-Mobile ARM platforms
  522. config ARCH_RPC
  523. bool "RiscPC"
  524. select ARCH_ACORN
  525. select FIQ
  526. select TIMER_ACORN
  527. select ARCH_MAY_HAVE_PC_FDC
  528. select HAVE_PATA_PLATFORM
  529. select ISA_DMA_API
  530. select NO_IOPORT
  531. select ARCH_SPARSEMEM_ENABLE
  532. select ARCH_USES_GETTIMEOFFSET
  533. help
  534. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  535. CD-ROM interface, serial and parallel port, and the floppy drive.
  536. config ARCH_SA1100
  537. bool "SA1100-based"
  538. select CPU_SA1100
  539. select ISA
  540. select ARCH_SPARSEMEM_ENABLE
  541. select ARCH_MTD_XIP
  542. select ARCH_HAS_CPUFREQ
  543. select CPU_FREQ
  544. select GENERIC_CLOCKEVENTS
  545. select HAVE_CLK
  546. select TICK_ONESHOT
  547. select ARCH_REQUIRE_GPIOLIB
  548. help
  549. Support for StrongARM 11x0 based boards.
  550. config ARCH_S3C2410
  551. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  552. select GENERIC_GPIO
  553. select ARCH_HAS_CPUFREQ
  554. select HAVE_CLK
  555. select ARCH_USES_GETTIMEOFFSET
  556. select HAVE_S3C2410_I2C
  557. help
  558. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  559. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  560. the Samsung SMDK2410 development board (and derivatives).
  561. Note, the S3C2416 and the S3C2450 are so close that they even share
  562. the same SoC ID code. This means that there is no seperate machine
  563. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  564. config ARCH_S3C64XX
  565. bool "Samsung S3C64XX"
  566. select PLAT_SAMSUNG
  567. select CPU_V6
  568. select ARM_VIC
  569. select HAVE_CLK
  570. select NO_IOPORT
  571. select ARCH_USES_GETTIMEOFFSET
  572. select ARCH_HAS_CPUFREQ
  573. select ARCH_REQUIRE_GPIOLIB
  574. select SAMSUNG_CLKSRC
  575. select SAMSUNG_IRQ_VIC_TIMER
  576. select SAMSUNG_IRQ_UART
  577. select S3C_GPIO_TRACK
  578. select S3C_GPIO_PULL_UPDOWN
  579. select S3C_GPIO_CFG_S3C24XX
  580. select S3C_GPIO_CFG_S3C64XX
  581. select S3C_DEV_NAND
  582. select USB_ARCH_HAS_OHCI
  583. select SAMSUNG_GPIOLIB_4BIT
  584. select HAVE_S3C2410_I2C
  585. select HAVE_S3C2410_WATCHDOG
  586. help
  587. Samsung S3C64XX series based systems
  588. config ARCH_S5P6440
  589. bool "Samsung S5P6440"
  590. select CPU_V6
  591. select GENERIC_GPIO
  592. select HAVE_CLK
  593. select HAVE_S3C2410_WATCHDOG
  594. select ARCH_USES_GETTIMEOFFSET
  595. select HAVE_S3C2410_I2C
  596. select HAVE_S3C_RTC
  597. help
  598. Samsung S5P6440 CPU based systems
  599. config ARCH_S5P6442
  600. bool "Samsung S5P6442"
  601. select CPU_V6
  602. select GENERIC_GPIO
  603. select HAVE_CLK
  604. select ARCH_USES_GETTIMEOFFSET
  605. select HAVE_S3C2410_WATCHDOG
  606. help
  607. Samsung S5P6442 CPU based systems
  608. config ARCH_S5PC100
  609. bool "Samsung S5PC100"
  610. select GENERIC_GPIO
  611. select HAVE_CLK
  612. select CPU_V7
  613. select ARM_L1_CACHE_SHIFT_6
  614. select ARCH_USES_GETTIMEOFFSET
  615. select HAVE_S3C2410_I2C
  616. select HAVE_S3C_RTC
  617. select HAVE_S3C2410_WATCHDOG
  618. help
  619. Samsung S5PC100 series based systems
  620. config ARCH_S5PV210
  621. bool "Samsung S5PV210/S5PC110"
  622. select CPU_V7
  623. select GENERIC_GPIO
  624. select HAVE_CLK
  625. select ARM_L1_CACHE_SHIFT_6
  626. select ARCH_USES_GETTIMEOFFSET
  627. select HAVE_S3C2410_I2C
  628. select HAVE_S3C_RTC
  629. select HAVE_S3C2410_WATCHDOG
  630. help
  631. Samsung S5PV210/S5PC110 series based systems
  632. config ARCH_S5PV310
  633. bool "Samsung S5PV310/S5PC210"
  634. select CPU_V7
  635. select GENERIC_GPIO
  636. select HAVE_CLK
  637. select GENERIC_CLOCKEVENTS
  638. help
  639. Samsung S5PV310 series based systems
  640. config ARCH_SHARK
  641. bool "Shark"
  642. select CPU_SA110
  643. select ISA
  644. select ISA_DMA
  645. select ZONE_DMA
  646. select PCI
  647. select ARCH_USES_GETTIMEOFFSET
  648. help
  649. Support for the StrongARM based Digital DNARD machine, also known
  650. as "Shark" (<http://www.shark-linux.de/shark.html>).
  651. config ARCH_LH7A40X
  652. bool "Sharp LH7A40X"
  653. select CPU_ARM922T
  654. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  655. select ARCH_USES_GETTIMEOFFSET
  656. help
  657. Say Y here for systems based on one of the Sharp LH7A40X
  658. System on a Chip processors. These CPUs include an ARM922T
  659. core with a wide array of integrated devices for
  660. hand-held and low-power applications.
  661. config ARCH_U300
  662. bool "ST-Ericsson U300 Series"
  663. depends on MMU
  664. select CPU_ARM926T
  665. select HAVE_TCM
  666. select ARM_AMBA
  667. select ARM_VIC
  668. select GENERIC_CLOCKEVENTS
  669. select COMMON_CLKDEV
  670. select GENERIC_GPIO
  671. help
  672. Support for ST-Ericsson U300 series mobile platforms.
  673. config ARCH_U8500
  674. bool "ST-Ericsson U8500 Series"
  675. select CPU_V7
  676. select ARM_AMBA
  677. select GENERIC_CLOCKEVENTS
  678. select COMMON_CLKDEV
  679. select ARCH_REQUIRE_GPIOLIB
  680. help
  681. Support for ST-Ericsson's Ux500 architecture
  682. config ARCH_NOMADIK
  683. bool "STMicroelectronics Nomadik"
  684. select ARM_AMBA
  685. select ARM_VIC
  686. select CPU_ARM926T
  687. select COMMON_CLKDEV
  688. select GENERIC_CLOCKEVENTS
  689. select ARCH_REQUIRE_GPIOLIB
  690. help
  691. Support for the Nomadik platform by ST-Ericsson
  692. config ARCH_DAVINCI
  693. bool "TI DaVinci"
  694. select GENERIC_CLOCKEVENTS
  695. select ARCH_REQUIRE_GPIOLIB
  696. select ZONE_DMA
  697. select HAVE_IDE
  698. select COMMON_CLKDEV
  699. select GENERIC_ALLOCATOR
  700. select ARCH_HAS_HOLES_MEMORYMODEL
  701. help
  702. Support for TI's DaVinci platform.
  703. config ARCH_OMAP
  704. bool "TI OMAP"
  705. select HAVE_CLK
  706. select ARCH_REQUIRE_GPIOLIB
  707. select ARCH_HAS_CPUFREQ
  708. select GENERIC_CLOCKEVENTS
  709. select ARCH_HAS_HOLES_MEMORYMODEL
  710. help
  711. Support for TI's OMAP platform (OMAP1 and OMAP2).
  712. config PLAT_SPEAR
  713. bool "ST SPEAr"
  714. select ARM_AMBA
  715. select ARCH_REQUIRE_GPIOLIB
  716. select COMMON_CLKDEV
  717. select GENERIC_CLOCKEVENTS
  718. select HAVE_CLK
  719. help
  720. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  721. endchoice
  722. #
  723. # This is sorted alphabetically by mach-* pathname. However, plat-*
  724. # Kconfigs may be included either alphabetically (according to the
  725. # plat- suffix) or along side the corresponding mach-* source.
  726. #
  727. source "arch/arm/mach-aaec2000/Kconfig"
  728. source "arch/arm/mach-at91/Kconfig"
  729. source "arch/arm/mach-bcmring/Kconfig"
  730. source "arch/arm/mach-clps711x/Kconfig"
  731. source "arch/arm/mach-cns3xxx/Kconfig"
  732. source "arch/arm/mach-davinci/Kconfig"
  733. source "arch/arm/mach-dove/Kconfig"
  734. source "arch/arm/mach-ep93xx/Kconfig"
  735. source "arch/arm/mach-footbridge/Kconfig"
  736. source "arch/arm/mach-gemini/Kconfig"
  737. source "arch/arm/mach-h720x/Kconfig"
  738. source "arch/arm/mach-integrator/Kconfig"
  739. source "arch/arm/mach-iop32x/Kconfig"
  740. source "arch/arm/mach-iop33x/Kconfig"
  741. source "arch/arm/mach-iop13xx/Kconfig"
  742. source "arch/arm/mach-ixp4xx/Kconfig"
  743. source "arch/arm/mach-ixp2000/Kconfig"
  744. source "arch/arm/mach-ixp23xx/Kconfig"
  745. source "arch/arm/mach-kirkwood/Kconfig"
  746. source "arch/arm/mach-ks8695/Kconfig"
  747. source "arch/arm/mach-lh7a40x/Kconfig"
  748. source "arch/arm/mach-loki/Kconfig"
  749. source "arch/arm/mach-lpc32xx/Kconfig"
  750. source "arch/arm/mach-msm/Kconfig"
  751. source "arch/arm/mach-mv78xx0/Kconfig"
  752. source "arch/arm/plat-mxc/Kconfig"
  753. source "arch/arm/mach-netx/Kconfig"
  754. source "arch/arm/mach-nomadik/Kconfig"
  755. source "arch/arm/plat-nomadik/Kconfig"
  756. source "arch/arm/mach-ns9xxx/Kconfig"
  757. source "arch/arm/mach-nuc93x/Kconfig"
  758. source "arch/arm/plat-omap/Kconfig"
  759. source "arch/arm/mach-omap1/Kconfig"
  760. source "arch/arm/mach-omap2/Kconfig"
  761. source "arch/arm/mach-orion5x/Kconfig"
  762. source "arch/arm/mach-pxa/Kconfig"
  763. source "arch/arm/plat-pxa/Kconfig"
  764. source "arch/arm/mach-mmp/Kconfig"
  765. source "arch/arm/mach-realview/Kconfig"
  766. source "arch/arm/mach-sa1100/Kconfig"
  767. source "arch/arm/plat-samsung/Kconfig"
  768. source "arch/arm/plat-s3c24xx/Kconfig"
  769. source "arch/arm/plat-s5p/Kconfig"
  770. source "arch/arm/plat-spear/Kconfig"
  771. if ARCH_S3C2410
  772. source "arch/arm/mach-s3c2400/Kconfig"
  773. source "arch/arm/mach-s3c2410/Kconfig"
  774. source "arch/arm/mach-s3c2412/Kconfig"
  775. source "arch/arm/mach-s3c2416/Kconfig"
  776. source "arch/arm/mach-s3c2440/Kconfig"
  777. source "arch/arm/mach-s3c2443/Kconfig"
  778. endif
  779. if ARCH_S3C64XX
  780. source "arch/arm/mach-s3c64xx/Kconfig"
  781. endif
  782. source "arch/arm/mach-s5p6440/Kconfig"
  783. source "arch/arm/mach-s5p6442/Kconfig"
  784. source "arch/arm/mach-s5pc100/Kconfig"
  785. source "arch/arm/mach-s5pv210/Kconfig"
  786. source "arch/arm/mach-s5pv310/Kconfig"
  787. source "arch/arm/mach-shmobile/Kconfig"
  788. source "arch/arm/plat-stmp3xxx/Kconfig"
  789. source "arch/arm/mach-tegra/Kconfig"
  790. source "arch/arm/mach-u300/Kconfig"
  791. source "arch/arm/mach-ux500/Kconfig"
  792. source "arch/arm/mach-versatile/Kconfig"
  793. source "arch/arm/mach-vexpress/Kconfig"
  794. source "arch/arm/mach-w90x900/Kconfig"
  795. # Definitions to make life easier
  796. config ARCH_ACORN
  797. bool
  798. config PLAT_IOP
  799. bool
  800. select GENERIC_CLOCKEVENTS
  801. config PLAT_ORION
  802. bool
  803. config PLAT_PXA
  804. bool
  805. config PLAT_VERSATILE
  806. bool
  807. config ARM_TIMER_SP804
  808. bool
  809. source arch/arm/mm/Kconfig
  810. config IWMMXT
  811. bool "Enable iWMMXt support"
  812. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  813. default y if PXA27x || PXA3xx || ARCH_MMP
  814. help
  815. Enable support for iWMMXt context switching at run time if
  816. running on a CPU that supports it.
  817. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  818. config XSCALE_PMU
  819. bool
  820. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  821. default y
  822. config CPU_HAS_PMU
  823. depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
  824. (!ARCH_OMAP3 || OMAP3_EMU)
  825. default y
  826. bool
  827. if !MMU
  828. source "arch/arm/Kconfig-nommu"
  829. endif
  830. config ARM_ERRATA_411920
  831. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  832. depends on CPU_V6 && !SMP
  833. help
  834. Invalidation of the Instruction Cache operation can
  835. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  836. It does not affect the MPCore. This option enables the ARM Ltd.
  837. recommended workaround.
  838. config ARM_ERRATA_430973
  839. bool "ARM errata: Stale prediction on replaced interworking branch"
  840. depends on CPU_V7
  841. help
  842. This option enables the workaround for the 430973 Cortex-A8
  843. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  844. interworking branch is replaced with another code sequence at the
  845. same virtual address, whether due to self-modifying code or virtual
  846. to physical address re-mapping, Cortex-A8 does not recover from the
  847. stale interworking branch prediction. This results in Cortex-A8
  848. executing the new code sequence in the incorrect ARM or Thumb state.
  849. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  850. and also flushes the branch target cache at every context switch.
  851. Note that setting specific bits in the ACTLR register may not be
  852. available in non-secure mode.
  853. config ARM_ERRATA_458693
  854. bool "ARM errata: Processor deadlock when a false hazard is created"
  855. depends on CPU_V7
  856. help
  857. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  858. erratum. For very specific sequences of memory operations, it is
  859. possible for a hazard condition intended for a cache line to instead
  860. be incorrectly associated with a different cache line. This false
  861. hazard might then cause a processor deadlock. The workaround enables
  862. the L1 caching of the NEON accesses and disables the PLD instruction
  863. in the ACTLR register. Note that setting specific bits in the ACTLR
  864. register may not be available in non-secure mode.
  865. config ARM_ERRATA_460075
  866. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  867. depends on CPU_V7
  868. help
  869. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  870. erratum. Any asynchronous access to the L2 cache may encounter a
  871. situation in which recent store transactions to the L2 cache are lost
  872. and overwritten with stale memory contents from external memory. The
  873. workaround disables the write-allocate mode for the L2 cache via the
  874. ACTLR register. Note that setting specific bits in the ACTLR register
  875. may not be available in non-secure mode.
  876. config ARM_ERRATA_742230
  877. bool "ARM errata: DMB operation may be faulty"
  878. depends on CPU_V7 && SMP
  879. help
  880. This option enables the workaround for the 742230 Cortex-A9
  881. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  882. between two write operations may not ensure the correct visibility
  883. ordering of the two writes. This workaround sets a specific bit in
  884. the diagnostic register of the Cortex-A9 which causes the DMB
  885. instruction to behave as a DSB, ensuring the correct behaviour of
  886. the two writes.
  887. config ARM_ERRATA_742231
  888. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  889. depends on CPU_V7 && SMP
  890. help
  891. This option enables the workaround for the 742231 Cortex-A9
  892. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  893. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  894. accessing some data located in the same cache line, may get corrupted
  895. data due to bad handling of the address hazard when the line gets
  896. replaced from one of the CPUs at the same time as another CPU is
  897. accessing it. This workaround sets specific bits in the diagnostic
  898. register of the Cortex-A9 which reduces the linefill issuing
  899. capabilities of the processor.
  900. config PL310_ERRATA_588369
  901. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  902. depends on CACHE_L2X0 && ARCH_OMAP4
  903. help
  904. The PL310 L2 cache controller implements three types of Clean &
  905. Invalidate maintenance operations: by Physical Address
  906. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  907. They are architecturally defined to behave as the execution of a
  908. clean operation followed immediately by an invalidate operation,
  909. both performing to the same memory location. This functionality
  910. is not correctly implemented in PL310 as clean lines are not
  911. invalidated as a result of these operations. Note that this errata
  912. uses Texas Instrument's secure monitor api.
  913. config ARM_ERRATA_720789
  914. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  915. depends on CPU_V7 && SMP
  916. help
  917. This option enables the workaround for the 720789 Cortex-A9 (prior to
  918. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  919. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  920. As a consequence of this erratum, some TLB entries which should be
  921. invalidated are not, resulting in an incoherency in the system page
  922. tables. The workaround changes the TLB flushing routines to invalidate
  923. entries regardless of the ASID.
  924. endmenu
  925. source "arch/arm/common/Kconfig"
  926. menu "Bus support"
  927. config ARM_AMBA
  928. bool
  929. config ISA
  930. bool
  931. help
  932. Find out whether you have ISA slots on your motherboard. ISA is the
  933. name of a bus system, i.e. the way the CPU talks to the other stuff
  934. inside your box. Other bus systems are PCI, EISA, MicroChannel
  935. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  936. newer boards don't support it. If you have ISA, say Y, otherwise N.
  937. # Select ISA DMA controller support
  938. config ISA_DMA
  939. bool
  940. select ISA_DMA_API
  941. # Select ISA DMA interface
  942. config ISA_DMA_API
  943. bool
  944. config PCI
  945. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE || ARCH_CNS3XXX
  946. help
  947. Find out whether you have a PCI motherboard. PCI is the name of a
  948. bus system, i.e. the way the CPU talks to the other stuff inside
  949. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  950. VESA. If you have PCI, say Y, otherwise N.
  951. config PCI_DOMAINS
  952. bool
  953. depends on PCI
  954. config PCI_SYSCALL
  955. def_bool PCI
  956. # Select the host bridge type
  957. config PCI_HOST_VIA82C505
  958. bool
  959. depends on PCI && ARCH_SHARK
  960. default y
  961. config PCI_HOST_ITE8152
  962. bool
  963. depends on PCI && MACH_ARMCORE
  964. default y
  965. select DMABOUNCE
  966. source "drivers/pci/Kconfig"
  967. source "drivers/pcmcia/Kconfig"
  968. endmenu
  969. menu "Kernel Features"
  970. source "kernel/time/Kconfig"
  971. config SMP
  972. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  973. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  974. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
  975. ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  976. depends on GENERIC_CLOCKEVENTS
  977. select USE_GENERIC_SMP_HELPERS
  978. select HAVE_ARM_SCU if ARCH_REALVIEW || ARCH_OMAP4 || ARCH_S5PV310 ||\
  979. ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4
  980. help
  981. This enables support for systems with more than one CPU. If you have
  982. a system with only one CPU, like most personal computers, say N. If
  983. you have a system with more than one CPU, say Y.
  984. If you say N here, the kernel will run on single and multiprocessor
  985. machines, but will use only one CPU of a multiprocessor machine. If
  986. you say Y here, the kernel will run on many, but not all, single
  987. processor machines. On a single processor machine, the kernel will
  988. run faster if you say N here.
  989. See also <file:Documentation/i386/IO-APIC.txt>,
  990. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  991. <http://www.linuxdoc.org/docs.html#howto>.
  992. If you don't know what to do here, say N.
  993. config HAVE_ARM_SCU
  994. bool
  995. depends on SMP
  996. help
  997. This option enables support for the ARM system coherency unit
  998. config HAVE_ARM_TWD
  999. bool
  1000. depends on SMP
  1001. help
  1002. This options enables support for the ARM timer and watchdog unit
  1003. choice
  1004. prompt "Memory split"
  1005. default VMSPLIT_3G
  1006. help
  1007. Select the desired split between kernel and user memory.
  1008. If you are not absolutely sure what you are doing, leave this
  1009. option alone!
  1010. config VMSPLIT_3G
  1011. bool "3G/1G user/kernel split"
  1012. config VMSPLIT_2G
  1013. bool "2G/2G user/kernel split"
  1014. config VMSPLIT_1G
  1015. bool "1G/3G user/kernel split"
  1016. endchoice
  1017. config PAGE_OFFSET
  1018. hex
  1019. default 0x40000000 if VMSPLIT_1G
  1020. default 0x80000000 if VMSPLIT_2G
  1021. default 0xC0000000
  1022. config NR_CPUS
  1023. int "Maximum number of CPUs (2-32)"
  1024. range 2 32
  1025. depends on SMP
  1026. default "4"
  1027. config HOTPLUG_CPU
  1028. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1029. depends on SMP && HOTPLUG && EXPERIMENTAL
  1030. help
  1031. Say Y here to experiment with turning CPUs off and on. CPUs
  1032. can be controlled through /sys/devices/system/cpu.
  1033. config LOCAL_TIMERS
  1034. bool "Use local timer interrupts"
  1035. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  1036. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1037. ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  1038. default y
  1039. select HAVE_ARM_TWD if ARCH_REALVIEW || ARCH_OMAP4 || ARCH_S5PV310 || \
  1040. ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS
  1041. help
  1042. Enable support for local timers on SMP platforms, rather then the
  1043. legacy IPI broadcast method. Local timers allows the system
  1044. accounting to be spread across the timer interval, preventing a
  1045. "thundering herd" at every timer tick.
  1046. source kernel/Kconfig.preempt
  1047. config HZ
  1048. int
  1049. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || \
  1050. ARCH_S5P6442 || ARCH_S5PV210 || ARCH_S5PV310
  1051. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1052. default AT91_TIMER_HZ if ARCH_AT91
  1053. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1054. default 100
  1055. config THUMB2_KERNEL
  1056. bool "Compile the kernel in Thumb-2 mode"
  1057. depends on CPU_V7 && EXPERIMENTAL
  1058. select AEABI
  1059. select ARM_ASM_UNIFIED
  1060. help
  1061. By enabling this option, the kernel will be compiled in
  1062. Thumb-2 mode. A compiler/assembler that understand the unified
  1063. ARM-Thumb syntax is needed.
  1064. If unsure, say N.
  1065. config ARM_ASM_UNIFIED
  1066. bool
  1067. config AEABI
  1068. bool "Use the ARM EABI to compile the kernel"
  1069. help
  1070. This option allows for the kernel to be compiled using the latest
  1071. ARM ABI (aka EABI). This is only useful if you are using a user
  1072. space environment that is also compiled with EABI.
  1073. Since there are major incompatibilities between the legacy ABI and
  1074. EABI, especially with regard to structure member alignment, this
  1075. option also changes the kernel syscall calling convention to
  1076. disambiguate both ABIs and allow for backward compatibility support
  1077. (selected with CONFIG_OABI_COMPAT).
  1078. To use this you need GCC version 4.0.0 or later.
  1079. config OABI_COMPAT
  1080. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1081. depends on AEABI && EXPERIMENTAL
  1082. default y
  1083. help
  1084. This option preserves the old syscall interface along with the
  1085. new (ARM EABI) one. It also provides a compatibility layer to
  1086. intercept syscalls that have structure arguments which layout
  1087. in memory differs between the legacy ABI and the new ARM EABI
  1088. (only for non "thumb" binaries). This option adds a tiny
  1089. overhead to all syscalls and produces a slightly larger kernel.
  1090. If you know you'll be using only pure EABI user space then you
  1091. can say N here. If this option is not selected and you attempt
  1092. to execute a legacy ABI binary then the result will be
  1093. UNPREDICTABLE (in fact it can be predicted that it won't work
  1094. at all). If in doubt say Y.
  1095. config ARCH_HAS_HOLES_MEMORYMODEL
  1096. bool
  1097. config ARCH_SPARSEMEM_ENABLE
  1098. bool
  1099. config ARCH_SPARSEMEM_DEFAULT
  1100. def_bool ARCH_SPARSEMEM_ENABLE
  1101. config ARCH_SELECT_MEMORY_MODEL
  1102. def_bool ARCH_SPARSEMEM_ENABLE
  1103. config HIGHMEM
  1104. bool "High Memory Support (EXPERIMENTAL)"
  1105. depends on MMU && EXPERIMENTAL
  1106. help
  1107. The address space of ARM processors is only 4 Gigabytes large
  1108. and it has to accommodate user address space, kernel address
  1109. space as well as some memory mapped IO. That means that, if you
  1110. have a large amount of physical memory and/or IO, not all of the
  1111. memory can be "permanently mapped" by the kernel. The physical
  1112. memory that is not permanently mapped is called "high memory".
  1113. Depending on the selected kernel/user memory split, minimum
  1114. vmalloc space and actual amount of RAM, you may not need this
  1115. option which should result in a slightly faster kernel.
  1116. If unsure, say n.
  1117. config HIGHPTE
  1118. bool "Allocate 2nd-level pagetables from highmem"
  1119. depends on HIGHMEM
  1120. depends on !OUTER_CACHE
  1121. config HW_PERF_EVENTS
  1122. bool "Enable hardware performance counter support for perf events"
  1123. depends on PERF_EVENTS && CPU_HAS_PMU
  1124. default y
  1125. help
  1126. Enable hardware performance counter support for perf events. If
  1127. disabled, perf events will use software events only.
  1128. config SPARSE_IRQ
  1129. def_bool n
  1130. help
  1131. This enables support for sparse irqs. This is useful in general
  1132. as most CPUs have a fairly sparse array of IRQ vectors, which
  1133. the irq_desc then maps directly on to. Systems with a high
  1134. number of off-chip IRQs will want to treat this as
  1135. experimental until they have been independently verified.
  1136. source "mm/Kconfig"
  1137. config FORCE_MAX_ZONEORDER
  1138. int "Maximum zone order" if ARCH_SHMOBILE
  1139. range 11 64 if ARCH_SHMOBILE
  1140. default "9" if SA1111
  1141. default "11"
  1142. help
  1143. The kernel memory allocator divides physically contiguous memory
  1144. blocks into "zones", where each zone is a power of two number of
  1145. pages. This option selects the largest power of two that the kernel
  1146. keeps in the memory allocator. If you need to allocate very large
  1147. blocks of physically contiguous memory, then you may need to
  1148. increase this value.
  1149. This config option is actually maximum order plus one. For example,
  1150. a value of 11 means that the largest free memory block is 2^10 pages.
  1151. config LEDS
  1152. bool "Timer and CPU usage LEDs"
  1153. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1154. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1155. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1156. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1157. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1158. ARCH_AT91 || ARCH_DAVINCI || \
  1159. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1160. help
  1161. If you say Y here, the LEDs on your machine will be used
  1162. to provide useful information about your current system status.
  1163. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1164. be able to select which LEDs are active using the options below. If
  1165. you are compiling a kernel for the EBSA-110 or the LART however, the
  1166. red LED will simply flash regularly to indicate that the system is
  1167. still functional. It is safe to say Y here if you have a CATS
  1168. system, but the driver will do nothing.
  1169. config LEDS_TIMER
  1170. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1171. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1172. || MACH_OMAP_PERSEUS2
  1173. depends on LEDS
  1174. depends on !GENERIC_CLOCKEVENTS
  1175. default y if ARCH_EBSA110
  1176. help
  1177. If you say Y here, one of the system LEDs (the green one on the
  1178. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1179. will flash regularly to indicate that the system is still
  1180. operational. This is mainly useful to kernel hackers who are
  1181. debugging unstable kernels.
  1182. The LART uses the same LED for both Timer LED and CPU usage LED
  1183. functions. You may choose to use both, but the Timer LED function
  1184. will overrule the CPU usage LED.
  1185. config LEDS_CPU
  1186. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1187. !ARCH_OMAP) \
  1188. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1189. || MACH_OMAP_PERSEUS2
  1190. depends on LEDS
  1191. help
  1192. If you say Y here, the red LED will be used to give a good real
  1193. time indication of CPU usage, by lighting whenever the idle task
  1194. is not currently executing.
  1195. The LART uses the same LED for both Timer LED and CPU usage LED
  1196. functions. You may choose to use both, but the Timer LED function
  1197. will overrule the CPU usage LED.
  1198. config ALIGNMENT_TRAP
  1199. bool
  1200. depends on CPU_CP15_MMU
  1201. default y if !ARCH_EBSA110
  1202. select HAVE_PROC_CPU if PROC_FS
  1203. help
  1204. ARM processors cannot fetch/store information which is not
  1205. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1206. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1207. fetch/store instructions will be emulated in software if you say
  1208. here, which has a severe performance impact. This is necessary for
  1209. correct operation of some network protocols. With an IP-only
  1210. configuration it is safe to say N, otherwise say Y.
  1211. config UACCESS_WITH_MEMCPY
  1212. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1213. depends on MMU && EXPERIMENTAL
  1214. default y if CPU_FEROCEON
  1215. help
  1216. Implement faster copy_to_user and clear_user methods for CPU
  1217. cores where a 8-word STM instruction give significantly higher
  1218. memory write throughput than a sequence of individual 32bit stores.
  1219. A possible side effect is a slight increase in scheduling latency
  1220. between threads sharing the same address space if they invoke
  1221. such copy operations with large buffers.
  1222. However, if the CPU data cache is using a write-allocate mode,
  1223. this option is unlikely to provide any performance gain.
  1224. config CC_STACKPROTECTOR
  1225. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1226. help
  1227. This option turns on the -fstack-protector GCC feature. This
  1228. feature puts, at the beginning of functions, a canary value on
  1229. the stack just before the return address, and validates
  1230. the value just before actually returning. Stack based buffer
  1231. overflows (that need to overwrite this return address) now also
  1232. overwrite the canary, which gets detected and the attack is then
  1233. neutralized via a kernel panic.
  1234. This feature requires gcc version 4.2 or above.
  1235. config DEPRECATED_PARAM_STRUCT
  1236. bool "Provide old way to pass kernel parameters"
  1237. help
  1238. This was deprecated in 2001 and announced to live on for 5 years.
  1239. Some old boot loaders still use this way.
  1240. endmenu
  1241. menu "Boot options"
  1242. # Compressed boot loader in ROM. Yes, we really want to ask about
  1243. # TEXT and BSS so we preserve their values in the config files.
  1244. config ZBOOT_ROM_TEXT
  1245. hex "Compressed ROM boot loader base address"
  1246. default "0"
  1247. help
  1248. The physical address at which the ROM-able zImage is to be
  1249. placed in the target. Platforms which normally make use of
  1250. ROM-able zImage formats normally set this to a suitable
  1251. value in their defconfig file.
  1252. If ZBOOT_ROM is not enabled, this has no effect.
  1253. config ZBOOT_ROM_BSS
  1254. hex "Compressed ROM boot loader BSS address"
  1255. default "0"
  1256. help
  1257. The base address of an area of read/write memory in the target
  1258. for the ROM-able zImage which must be available while the
  1259. decompressor is running. It must be large enough to hold the
  1260. entire decompressed kernel plus an additional 128 KiB.
  1261. Platforms which normally make use of ROM-able zImage formats
  1262. normally set this to a suitable value in their defconfig file.
  1263. If ZBOOT_ROM is not enabled, this has no effect.
  1264. config ZBOOT_ROM
  1265. bool "Compressed boot loader in ROM/flash"
  1266. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1267. help
  1268. Say Y here if you intend to execute your compressed kernel image
  1269. (zImage) directly from ROM or flash. If unsure, say N.
  1270. config CMDLINE
  1271. string "Default kernel command string"
  1272. default ""
  1273. help
  1274. On some architectures (EBSA110 and CATS), there is currently no way
  1275. for the boot loader to pass arguments to the kernel. For these
  1276. architectures, you should supply some command-line options at build
  1277. time by entering them here. As a minimum, you should specify the
  1278. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1279. config CMDLINE_FORCE
  1280. bool "Always use the default kernel command string"
  1281. depends on CMDLINE != ""
  1282. help
  1283. Always use the default kernel command string, even if the boot
  1284. loader passes other arguments to the kernel.
  1285. This is useful if you cannot or don't want to change the
  1286. command-line options your boot loader passes to the kernel.
  1287. If unsure, say N.
  1288. config XIP_KERNEL
  1289. bool "Kernel Execute-In-Place from ROM"
  1290. depends on !ZBOOT_ROM
  1291. help
  1292. Execute-In-Place allows the kernel to run from non-volatile storage
  1293. directly addressable by the CPU, such as NOR flash. This saves RAM
  1294. space since the text section of the kernel is not loaded from flash
  1295. to RAM. Read-write sections, such as the data section and stack,
  1296. are still copied to RAM. The XIP kernel is not compressed since
  1297. it has to run directly from flash, so it will take more space to
  1298. store it. The flash address used to link the kernel object files,
  1299. and for storing it, is configuration dependent. Therefore, if you
  1300. say Y here, you must know the proper physical address where to
  1301. store the kernel image depending on your own flash memory usage.
  1302. Also note that the make target becomes "make xipImage" rather than
  1303. "make zImage" or "make Image". The final kernel binary to put in
  1304. ROM memory will be arch/arm/boot/xipImage.
  1305. If unsure, say N.
  1306. config XIP_PHYS_ADDR
  1307. hex "XIP Kernel Physical Location"
  1308. depends on XIP_KERNEL
  1309. default "0x00080000"
  1310. help
  1311. This is the physical address in your flash memory the kernel will
  1312. be linked for and stored to. This address is dependent on your
  1313. own flash usage.
  1314. config KEXEC
  1315. bool "Kexec system call (EXPERIMENTAL)"
  1316. depends on EXPERIMENTAL
  1317. help
  1318. kexec is a system call that implements the ability to shutdown your
  1319. current kernel, and to start another kernel. It is like a reboot
  1320. but it is independent of the system firmware. And like a reboot
  1321. you can start any kernel with it, not just Linux.
  1322. It is an ongoing process to be certain the hardware in a machine
  1323. is properly shutdown, so do not be surprised if this code does not
  1324. initially work for you. It may help to enable device hotplugging
  1325. support.
  1326. config ATAGS_PROC
  1327. bool "Export atags in procfs"
  1328. depends on KEXEC
  1329. default y
  1330. help
  1331. Should the atags used to boot the kernel be exported in an "atags"
  1332. file in procfs. Useful with kexec.
  1333. config AUTO_ZRELADDR
  1334. bool "Auto calculation of the decompressed kernel image address"
  1335. depends on !ZBOOT_ROM && !ARCH_U300
  1336. help
  1337. ZRELADDR is the physical address where the decompressed kernel
  1338. image will be placed. If AUTO_ZRELADDR is selected, the address
  1339. will be determined at run-time by masking the current IP with
  1340. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1341. from start of memory.
  1342. endmenu
  1343. menu "CPU Power Management"
  1344. if ARCH_HAS_CPUFREQ
  1345. source "drivers/cpufreq/Kconfig"
  1346. config CPU_FREQ_SA1100
  1347. bool
  1348. config CPU_FREQ_SA1110
  1349. bool
  1350. config CPU_FREQ_INTEGRATOR
  1351. tristate "CPUfreq driver for ARM Integrator CPUs"
  1352. depends on ARCH_INTEGRATOR && CPU_FREQ
  1353. default y
  1354. help
  1355. This enables the CPUfreq driver for ARM Integrator CPUs.
  1356. For details, take a look at <file:Documentation/cpu-freq>.
  1357. If in doubt, say Y.
  1358. config CPU_FREQ_PXA
  1359. bool
  1360. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1361. default y
  1362. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1363. config CPU_FREQ_S3C64XX
  1364. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1365. depends on CPU_FREQ && CPU_S3C6410
  1366. config CPU_FREQ_S3C
  1367. bool
  1368. help
  1369. Internal configuration node for common cpufreq on Samsung SoC
  1370. config CPU_FREQ_S3C24XX
  1371. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1372. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1373. select CPU_FREQ_S3C
  1374. help
  1375. This enables the CPUfreq driver for the Samsung S3C24XX family
  1376. of CPUs.
  1377. For details, take a look at <file:Documentation/cpu-freq>.
  1378. If in doubt, say N.
  1379. config CPU_FREQ_S3C24XX_PLL
  1380. bool "Support CPUfreq changing of PLL frequency"
  1381. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1382. help
  1383. Compile in support for changing the PLL frequency from the
  1384. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1385. after a frequency change, so by default it is not enabled.
  1386. This also means that the PLL tables for the selected CPU(s) will
  1387. be built which may increase the size of the kernel image.
  1388. config CPU_FREQ_S3C24XX_DEBUG
  1389. bool "Debug CPUfreq Samsung driver core"
  1390. depends on CPU_FREQ_S3C24XX
  1391. help
  1392. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1393. config CPU_FREQ_S3C24XX_IODEBUG
  1394. bool "Debug CPUfreq Samsung driver IO timing"
  1395. depends on CPU_FREQ_S3C24XX
  1396. help
  1397. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1398. config CPU_FREQ_S3C24XX_DEBUGFS
  1399. bool "Export debugfs for CPUFreq"
  1400. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1401. help
  1402. Export status information via debugfs.
  1403. endif
  1404. source "drivers/cpuidle/Kconfig"
  1405. endmenu
  1406. menu "Floating point emulation"
  1407. comment "At least one emulation must be selected"
  1408. config FPE_NWFPE
  1409. bool "NWFPE math emulation"
  1410. depends on !AEABI || OABI_COMPAT
  1411. ---help---
  1412. Say Y to include the NWFPE floating point emulator in the kernel.
  1413. This is necessary to run most binaries. Linux does not currently
  1414. support floating point hardware so you need to say Y here even if
  1415. your machine has an FPA or floating point co-processor podule.
  1416. You may say N here if you are going to load the Acorn FPEmulator
  1417. early in the bootup.
  1418. config FPE_NWFPE_XP
  1419. bool "Support extended precision"
  1420. depends on FPE_NWFPE
  1421. help
  1422. Say Y to include 80-bit support in the kernel floating-point
  1423. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1424. Note that gcc does not generate 80-bit operations by default,
  1425. so in most cases this option only enlarges the size of the
  1426. floating point emulator without any good reason.
  1427. You almost surely want to say N here.
  1428. config FPE_FASTFPE
  1429. bool "FastFPE math emulation (EXPERIMENTAL)"
  1430. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1431. ---help---
  1432. Say Y here to include the FAST floating point emulator in the kernel.
  1433. This is an experimental much faster emulator which now also has full
  1434. precision for the mantissa. It does not support any exceptions.
  1435. It is very simple, and approximately 3-6 times faster than NWFPE.
  1436. It should be sufficient for most programs. It may be not suitable
  1437. for scientific calculations, but you have to check this for yourself.
  1438. If you do not feel you need a faster FP emulation you should better
  1439. choose NWFPE.
  1440. config VFP
  1441. bool "VFP-format floating point maths"
  1442. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1443. help
  1444. Say Y to include VFP support code in the kernel. This is needed
  1445. if your hardware includes a VFP unit.
  1446. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1447. release notes and additional status information.
  1448. Say N if your target does not have VFP hardware.
  1449. config VFPv3
  1450. bool
  1451. depends on VFP
  1452. default y if CPU_V7
  1453. config NEON
  1454. bool "Advanced SIMD (NEON) Extension support"
  1455. depends on VFPv3 && CPU_V7
  1456. help
  1457. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1458. Extension.
  1459. endmenu
  1460. menu "Userspace binary formats"
  1461. source "fs/Kconfig.binfmt"
  1462. config ARTHUR
  1463. tristate "RISC OS personality"
  1464. depends on !AEABI
  1465. help
  1466. Say Y here to include the kernel code necessary if you want to run
  1467. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1468. experimental; if this sounds frightening, say N and sleep in peace.
  1469. You can also say M here to compile this support as a module (which
  1470. will be called arthur).
  1471. endmenu
  1472. menu "Power management options"
  1473. source "kernel/power/Kconfig"
  1474. config ARCH_SUSPEND_POSSIBLE
  1475. def_bool y
  1476. endmenu
  1477. source "net/Kconfig"
  1478. source "drivers/Kconfig"
  1479. source "fs/Kconfig"
  1480. source "arch/arm/Kconfig.debug"
  1481. source "security/Kconfig"
  1482. source "crypto/Kconfig"
  1483. source "lib/Kconfig"