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. select SPARSE_IRQ
  506. help
  507. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  508. config ARCH_MSM
  509. bool "Qualcomm MSM"
  510. select HAVE_CLK
  511. select GENERIC_CLOCKEVENTS
  512. select ARCH_REQUIRE_GPIOLIB
  513. help
  514. Support for Qualcomm MSM/QSD based systems. This runs on the
  515. apps processor of the MSM/QSD and depends on a shared memory
  516. interface to the modem processor which runs the baseband
  517. stack and controls some vital subsystems
  518. (clock and power control, etc).
  519. config ARCH_SHMOBILE
  520. bool "Renesas SH-Mobile"
  521. help
  522. Support for Renesas's SH-Mobile ARM platforms
  523. config ARCH_RPC
  524. bool "RiscPC"
  525. select ARCH_ACORN
  526. select FIQ
  527. select TIMER_ACORN
  528. select ARCH_MAY_HAVE_PC_FDC
  529. select HAVE_PATA_PLATFORM
  530. select ISA_DMA_API
  531. select NO_IOPORT
  532. select ARCH_SPARSEMEM_ENABLE
  533. select ARCH_USES_GETTIMEOFFSET
  534. help
  535. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  536. CD-ROM interface, serial and parallel port, and the floppy drive.
  537. config ARCH_SA1100
  538. bool "SA1100-based"
  539. select CPU_SA1100
  540. select ISA
  541. select ARCH_SPARSEMEM_ENABLE
  542. select ARCH_MTD_XIP
  543. select ARCH_HAS_CPUFREQ
  544. select CPU_FREQ
  545. select GENERIC_CLOCKEVENTS
  546. select HAVE_CLK
  547. select TICK_ONESHOT
  548. select ARCH_REQUIRE_GPIOLIB
  549. help
  550. Support for StrongARM 11x0 based boards.
  551. config ARCH_S3C2410
  552. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  553. select GENERIC_GPIO
  554. select ARCH_HAS_CPUFREQ
  555. select HAVE_CLK
  556. select ARCH_USES_GETTIMEOFFSET
  557. select HAVE_S3C2410_I2C
  558. help
  559. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  560. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  561. the Samsung SMDK2410 development board (and derivatives).
  562. Note, the S3C2416 and the S3C2450 are so close that they even share
  563. the same SoC ID code. This means that there is no seperate machine
  564. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  565. config ARCH_S3C64XX
  566. bool "Samsung S3C64XX"
  567. select PLAT_SAMSUNG
  568. select CPU_V6
  569. select ARM_VIC
  570. select HAVE_CLK
  571. select NO_IOPORT
  572. select ARCH_USES_GETTIMEOFFSET
  573. select ARCH_HAS_CPUFREQ
  574. select ARCH_REQUIRE_GPIOLIB
  575. select SAMSUNG_CLKSRC
  576. select SAMSUNG_IRQ_VIC_TIMER
  577. select SAMSUNG_IRQ_UART
  578. select S3C_GPIO_TRACK
  579. select S3C_GPIO_PULL_UPDOWN
  580. select S3C_GPIO_CFG_S3C24XX
  581. select S3C_GPIO_CFG_S3C64XX
  582. select S3C_DEV_NAND
  583. select USB_ARCH_HAS_OHCI
  584. select SAMSUNG_GPIOLIB_4BIT
  585. select HAVE_S3C2410_I2C
  586. select HAVE_S3C2410_WATCHDOG
  587. help
  588. Samsung S3C64XX series based systems
  589. config ARCH_S5P6440
  590. bool "Samsung S5P6440"
  591. select CPU_V6
  592. select GENERIC_GPIO
  593. select HAVE_CLK
  594. select HAVE_S3C2410_WATCHDOG
  595. select ARCH_USES_GETTIMEOFFSET
  596. select HAVE_S3C2410_I2C
  597. select HAVE_S3C_RTC
  598. help
  599. Samsung S5P6440 CPU based systems
  600. config ARCH_S5P6442
  601. bool "Samsung S5P6442"
  602. select CPU_V6
  603. select GENERIC_GPIO
  604. select HAVE_CLK
  605. select ARCH_USES_GETTIMEOFFSET
  606. select HAVE_S3C2410_WATCHDOG
  607. help
  608. Samsung S5P6442 CPU based systems
  609. config ARCH_S5PC100
  610. bool "Samsung S5PC100"
  611. select GENERIC_GPIO
  612. select HAVE_CLK
  613. select CPU_V7
  614. select ARM_L1_CACHE_SHIFT_6
  615. select ARCH_USES_GETTIMEOFFSET
  616. select HAVE_S3C2410_I2C
  617. select HAVE_S3C_RTC
  618. select HAVE_S3C2410_WATCHDOG
  619. help
  620. Samsung S5PC100 series based systems
  621. config ARCH_S5PV210
  622. bool "Samsung S5PV210/S5PC110"
  623. select CPU_V7
  624. select GENERIC_GPIO
  625. select HAVE_CLK
  626. select ARM_L1_CACHE_SHIFT_6
  627. select ARCH_USES_GETTIMEOFFSET
  628. select HAVE_S3C2410_I2C
  629. select HAVE_S3C_RTC
  630. select HAVE_S3C2410_WATCHDOG
  631. help
  632. Samsung S5PV210/S5PC110 series based systems
  633. config ARCH_S5PV310
  634. bool "Samsung S5PV310/S5PC210"
  635. select CPU_V7
  636. select GENERIC_GPIO
  637. select HAVE_CLK
  638. select GENERIC_CLOCKEVENTS
  639. help
  640. Samsung S5PV310 series based systems
  641. config ARCH_SHARK
  642. bool "Shark"
  643. select CPU_SA110
  644. select ISA
  645. select ISA_DMA
  646. select ZONE_DMA
  647. select PCI
  648. select ARCH_USES_GETTIMEOFFSET
  649. help
  650. Support for the StrongARM based Digital DNARD machine, also known
  651. as "Shark" (<http://www.shark-linux.de/shark.html>).
  652. config ARCH_LH7A40X
  653. bool "Sharp LH7A40X"
  654. select CPU_ARM922T
  655. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  656. select ARCH_USES_GETTIMEOFFSET
  657. help
  658. Say Y here for systems based on one of the Sharp LH7A40X
  659. System on a Chip processors. These CPUs include an ARM922T
  660. core with a wide array of integrated devices for
  661. hand-held and low-power applications.
  662. config ARCH_U300
  663. bool "ST-Ericsson U300 Series"
  664. depends on MMU
  665. select CPU_ARM926T
  666. select HAVE_TCM
  667. select ARM_AMBA
  668. select ARM_VIC
  669. select GENERIC_CLOCKEVENTS
  670. select COMMON_CLKDEV
  671. select GENERIC_GPIO
  672. help
  673. Support for ST-Ericsson U300 series mobile platforms.
  674. config ARCH_U8500
  675. bool "ST-Ericsson U8500 Series"
  676. select CPU_V7
  677. select ARM_AMBA
  678. select GENERIC_CLOCKEVENTS
  679. select COMMON_CLKDEV
  680. select ARCH_REQUIRE_GPIOLIB
  681. help
  682. Support for ST-Ericsson's Ux500 architecture
  683. config ARCH_NOMADIK
  684. bool "STMicroelectronics Nomadik"
  685. select ARM_AMBA
  686. select ARM_VIC
  687. select CPU_ARM926T
  688. select COMMON_CLKDEV
  689. select GENERIC_CLOCKEVENTS
  690. select ARCH_REQUIRE_GPIOLIB
  691. help
  692. Support for the Nomadik platform by ST-Ericsson
  693. config ARCH_DAVINCI
  694. bool "TI DaVinci"
  695. select GENERIC_CLOCKEVENTS
  696. select ARCH_REQUIRE_GPIOLIB
  697. select ZONE_DMA
  698. select HAVE_IDE
  699. select COMMON_CLKDEV
  700. select GENERIC_ALLOCATOR
  701. select ARCH_HAS_HOLES_MEMORYMODEL
  702. help
  703. Support for TI's DaVinci platform.
  704. config ARCH_OMAP
  705. bool "TI OMAP"
  706. select HAVE_CLK
  707. select ARCH_REQUIRE_GPIOLIB
  708. select ARCH_HAS_CPUFREQ
  709. select GENERIC_CLOCKEVENTS
  710. select ARCH_HAS_HOLES_MEMORYMODEL
  711. help
  712. Support for TI's OMAP platform (OMAP1 and OMAP2).
  713. config PLAT_SPEAR
  714. bool "ST SPEAr"
  715. select ARM_AMBA
  716. select ARCH_REQUIRE_GPIOLIB
  717. select COMMON_CLKDEV
  718. select GENERIC_CLOCKEVENTS
  719. select HAVE_CLK
  720. help
  721. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  722. endchoice
  723. #
  724. # This is sorted alphabetically by mach-* pathname. However, plat-*
  725. # Kconfigs may be included either alphabetically (according to the
  726. # plat- suffix) or along side the corresponding mach-* source.
  727. #
  728. source "arch/arm/mach-aaec2000/Kconfig"
  729. source "arch/arm/mach-at91/Kconfig"
  730. source "arch/arm/mach-bcmring/Kconfig"
  731. source "arch/arm/mach-clps711x/Kconfig"
  732. source "arch/arm/mach-cns3xxx/Kconfig"
  733. source "arch/arm/mach-davinci/Kconfig"
  734. source "arch/arm/mach-dove/Kconfig"
  735. source "arch/arm/mach-ep93xx/Kconfig"
  736. source "arch/arm/mach-footbridge/Kconfig"
  737. source "arch/arm/mach-gemini/Kconfig"
  738. source "arch/arm/mach-h720x/Kconfig"
  739. source "arch/arm/mach-integrator/Kconfig"
  740. source "arch/arm/mach-iop32x/Kconfig"
  741. source "arch/arm/mach-iop33x/Kconfig"
  742. source "arch/arm/mach-iop13xx/Kconfig"
  743. source "arch/arm/mach-ixp4xx/Kconfig"
  744. source "arch/arm/mach-ixp2000/Kconfig"
  745. source "arch/arm/mach-ixp23xx/Kconfig"
  746. source "arch/arm/mach-kirkwood/Kconfig"
  747. source "arch/arm/mach-ks8695/Kconfig"
  748. source "arch/arm/mach-lh7a40x/Kconfig"
  749. source "arch/arm/mach-loki/Kconfig"
  750. source "arch/arm/mach-lpc32xx/Kconfig"
  751. source "arch/arm/mach-msm/Kconfig"
  752. source "arch/arm/mach-mv78xx0/Kconfig"
  753. source "arch/arm/plat-mxc/Kconfig"
  754. source "arch/arm/mach-netx/Kconfig"
  755. source "arch/arm/mach-nomadik/Kconfig"
  756. source "arch/arm/plat-nomadik/Kconfig"
  757. source "arch/arm/mach-ns9xxx/Kconfig"
  758. source "arch/arm/mach-nuc93x/Kconfig"
  759. source "arch/arm/plat-omap/Kconfig"
  760. source "arch/arm/mach-omap1/Kconfig"
  761. source "arch/arm/mach-omap2/Kconfig"
  762. source "arch/arm/mach-orion5x/Kconfig"
  763. source "arch/arm/mach-pxa/Kconfig"
  764. source "arch/arm/plat-pxa/Kconfig"
  765. source "arch/arm/mach-mmp/Kconfig"
  766. source "arch/arm/mach-realview/Kconfig"
  767. source "arch/arm/mach-sa1100/Kconfig"
  768. source "arch/arm/plat-samsung/Kconfig"
  769. source "arch/arm/plat-s3c24xx/Kconfig"
  770. source "arch/arm/plat-s5p/Kconfig"
  771. source "arch/arm/plat-spear/Kconfig"
  772. if ARCH_S3C2410
  773. source "arch/arm/mach-s3c2400/Kconfig"
  774. source "arch/arm/mach-s3c2410/Kconfig"
  775. source "arch/arm/mach-s3c2412/Kconfig"
  776. source "arch/arm/mach-s3c2416/Kconfig"
  777. source "arch/arm/mach-s3c2440/Kconfig"
  778. source "arch/arm/mach-s3c2443/Kconfig"
  779. endif
  780. if ARCH_S3C64XX
  781. source "arch/arm/mach-s3c64xx/Kconfig"
  782. endif
  783. source "arch/arm/mach-s5p6440/Kconfig"
  784. source "arch/arm/mach-s5p6442/Kconfig"
  785. source "arch/arm/mach-s5pc100/Kconfig"
  786. source "arch/arm/mach-s5pv210/Kconfig"
  787. source "arch/arm/mach-s5pv310/Kconfig"
  788. source "arch/arm/mach-shmobile/Kconfig"
  789. source "arch/arm/plat-stmp3xxx/Kconfig"
  790. source "arch/arm/mach-tegra/Kconfig"
  791. source "arch/arm/mach-u300/Kconfig"
  792. source "arch/arm/mach-ux500/Kconfig"
  793. source "arch/arm/mach-versatile/Kconfig"
  794. source "arch/arm/mach-vexpress/Kconfig"
  795. source "arch/arm/mach-w90x900/Kconfig"
  796. # Definitions to make life easier
  797. config ARCH_ACORN
  798. bool
  799. config PLAT_IOP
  800. bool
  801. select GENERIC_CLOCKEVENTS
  802. config PLAT_ORION
  803. bool
  804. config PLAT_PXA
  805. bool
  806. config PLAT_VERSATILE
  807. bool
  808. config ARM_TIMER_SP804
  809. bool
  810. source arch/arm/mm/Kconfig
  811. config IWMMXT
  812. bool "Enable iWMMXt support"
  813. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  814. default y if PXA27x || PXA3xx || ARCH_MMP
  815. help
  816. Enable support for iWMMXt context switching at run time if
  817. running on a CPU that supports it.
  818. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  819. config XSCALE_PMU
  820. bool
  821. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  822. default y
  823. config CPU_HAS_PMU
  824. depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
  825. (!ARCH_OMAP3 || OMAP3_EMU)
  826. default y
  827. bool
  828. if !MMU
  829. source "arch/arm/Kconfig-nommu"
  830. endif
  831. config ARM_ERRATA_411920
  832. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  833. depends on CPU_V6 && !SMP
  834. help
  835. Invalidation of the Instruction Cache operation can
  836. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  837. It does not affect the MPCore. This option enables the ARM Ltd.
  838. recommended workaround.
  839. config ARM_ERRATA_430973
  840. bool "ARM errata: Stale prediction on replaced interworking branch"
  841. depends on CPU_V7
  842. help
  843. This option enables the workaround for the 430973 Cortex-A8
  844. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  845. interworking branch is replaced with another code sequence at the
  846. same virtual address, whether due to self-modifying code or virtual
  847. to physical address re-mapping, Cortex-A8 does not recover from the
  848. stale interworking branch prediction. This results in Cortex-A8
  849. executing the new code sequence in the incorrect ARM or Thumb state.
  850. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  851. and also flushes the branch target cache at every context switch.
  852. Note that setting specific bits in the ACTLR register may not be
  853. available in non-secure mode.
  854. config ARM_ERRATA_458693
  855. bool "ARM errata: Processor deadlock when a false hazard is created"
  856. depends on CPU_V7
  857. help
  858. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  859. erratum. For very specific sequences of memory operations, it is
  860. possible for a hazard condition intended for a cache line to instead
  861. be incorrectly associated with a different cache line. This false
  862. hazard might then cause a processor deadlock. The workaround enables
  863. the L1 caching of the NEON accesses and disables the PLD instruction
  864. in the ACTLR register. Note that setting specific bits in the ACTLR
  865. register may not be available in non-secure mode.
  866. config ARM_ERRATA_460075
  867. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  868. depends on CPU_V7
  869. help
  870. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  871. erratum. Any asynchronous access to the L2 cache may encounter a
  872. situation in which recent store transactions to the L2 cache are lost
  873. and overwritten with stale memory contents from external memory. The
  874. workaround disables the write-allocate mode for the L2 cache via the
  875. ACTLR register. Note that setting specific bits in the ACTLR register
  876. may not be available in non-secure mode.
  877. config ARM_ERRATA_742230
  878. bool "ARM errata: DMB operation may be faulty"
  879. depends on CPU_V7 && SMP
  880. help
  881. This option enables the workaround for the 742230 Cortex-A9
  882. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  883. between two write operations may not ensure the correct visibility
  884. ordering of the two writes. This workaround sets a specific bit in
  885. the diagnostic register of the Cortex-A9 which causes the DMB
  886. instruction to behave as a DSB, ensuring the correct behaviour of
  887. the two writes.
  888. config ARM_ERRATA_742231
  889. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  890. depends on CPU_V7 && SMP
  891. help
  892. This option enables the workaround for the 742231 Cortex-A9
  893. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  894. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  895. accessing some data located in the same cache line, may get corrupted
  896. data due to bad handling of the address hazard when the line gets
  897. replaced from one of the CPUs at the same time as another CPU is
  898. accessing it. This workaround sets specific bits in the diagnostic
  899. register of the Cortex-A9 which reduces the linefill issuing
  900. capabilities of the processor.
  901. config PL310_ERRATA_588369
  902. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  903. depends on CACHE_L2X0 && ARCH_OMAP4
  904. help
  905. The PL310 L2 cache controller implements three types of Clean &
  906. Invalidate maintenance operations: by Physical Address
  907. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  908. They are architecturally defined to behave as the execution of a
  909. clean operation followed immediately by an invalidate operation,
  910. both performing to the same memory location. This functionality
  911. is not correctly implemented in PL310 as clean lines are not
  912. invalidated as a result of these operations. Note that this errata
  913. uses Texas Instrument's secure monitor api.
  914. config ARM_ERRATA_720789
  915. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  916. depends on CPU_V7 && SMP
  917. help
  918. This option enables the workaround for the 720789 Cortex-A9 (prior to
  919. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  920. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  921. As a consequence of this erratum, some TLB entries which should be
  922. invalidated are not, resulting in an incoherency in the system page
  923. tables. The workaround changes the TLB flushing routines to invalidate
  924. entries regardless of the ASID.
  925. endmenu
  926. source "arch/arm/common/Kconfig"
  927. menu "Bus support"
  928. config ARM_AMBA
  929. bool
  930. config ISA
  931. bool
  932. help
  933. Find out whether you have ISA slots on your motherboard. ISA is the
  934. name of a bus system, i.e. the way the CPU talks to the other stuff
  935. inside your box. Other bus systems are PCI, EISA, MicroChannel
  936. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  937. newer boards don't support it. If you have ISA, say Y, otherwise N.
  938. # Select ISA DMA controller support
  939. config ISA_DMA
  940. bool
  941. select ISA_DMA_API
  942. # Select ISA DMA interface
  943. config ISA_DMA_API
  944. bool
  945. config PCI
  946. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE || ARCH_CNS3XXX
  947. help
  948. Find out whether you have a PCI motherboard. PCI is the name of a
  949. bus system, i.e. the way the CPU talks to the other stuff inside
  950. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  951. VESA. If you have PCI, say Y, otherwise N.
  952. config PCI_DOMAINS
  953. bool
  954. depends on PCI
  955. config PCI_SYSCALL
  956. def_bool PCI
  957. # Select the host bridge type
  958. config PCI_HOST_VIA82C505
  959. bool
  960. depends on PCI && ARCH_SHARK
  961. default y
  962. config PCI_HOST_ITE8152
  963. bool
  964. depends on PCI && MACH_ARMCORE
  965. default y
  966. select DMABOUNCE
  967. source "drivers/pci/Kconfig"
  968. source "drivers/pcmcia/Kconfig"
  969. endmenu
  970. menu "Kernel Features"
  971. source "kernel/time/Kconfig"
  972. config SMP
  973. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  974. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  975. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
  976. ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  977. depends on GENERIC_CLOCKEVENTS
  978. select USE_GENERIC_SMP_HELPERS
  979. select HAVE_ARM_SCU if ARCH_REALVIEW || ARCH_OMAP4 || ARCH_S5PV310 ||\
  980. ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4
  981. help
  982. This enables support for systems with more than one CPU. If you have
  983. a system with only one CPU, like most personal computers, say N. If
  984. you have a system with more than one CPU, say Y.
  985. If you say N here, the kernel will run on single and multiprocessor
  986. machines, but will use only one CPU of a multiprocessor machine. If
  987. you say Y here, the kernel will run on many, but not all, single
  988. processor machines. On a single processor machine, the kernel will
  989. run faster if you say N here.
  990. See also <file:Documentation/i386/IO-APIC.txt>,
  991. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  992. <http://www.linuxdoc.org/docs.html#howto>.
  993. If you don't know what to do here, say N.
  994. config HAVE_ARM_SCU
  995. bool
  996. depends on SMP
  997. help
  998. This option enables support for the ARM system coherency unit
  999. config HAVE_ARM_TWD
  1000. bool
  1001. depends on SMP
  1002. help
  1003. This options enables support for the ARM timer and watchdog unit
  1004. choice
  1005. prompt "Memory split"
  1006. default VMSPLIT_3G
  1007. help
  1008. Select the desired split between kernel and user memory.
  1009. If you are not absolutely sure what you are doing, leave this
  1010. option alone!
  1011. config VMSPLIT_3G
  1012. bool "3G/1G user/kernel split"
  1013. config VMSPLIT_2G
  1014. bool "2G/2G user/kernel split"
  1015. config VMSPLIT_1G
  1016. bool "1G/3G user/kernel split"
  1017. endchoice
  1018. config PAGE_OFFSET
  1019. hex
  1020. default 0x40000000 if VMSPLIT_1G
  1021. default 0x80000000 if VMSPLIT_2G
  1022. default 0xC0000000
  1023. config NR_CPUS
  1024. int "Maximum number of CPUs (2-32)"
  1025. range 2 32
  1026. depends on SMP
  1027. default "4"
  1028. config HOTPLUG_CPU
  1029. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1030. depends on SMP && HOTPLUG && EXPERIMENTAL
  1031. help
  1032. Say Y here to experiment with turning CPUs off and on. CPUs
  1033. can be controlled through /sys/devices/system/cpu.
  1034. config LOCAL_TIMERS
  1035. bool "Use local timer interrupts"
  1036. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  1037. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1038. ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  1039. default y
  1040. select HAVE_ARM_TWD if ARCH_REALVIEW || ARCH_OMAP4 || ARCH_S5PV310 || \
  1041. ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS
  1042. help
  1043. Enable support for local timers on SMP platforms, rather then the
  1044. legacy IPI broadcast method. Local timers allows the system
  1045. accounting to be spread across the timer interval, preventing a
  1046. "thundering herd" at every timer tick.
  1047. source kernel/Kconfig.preempt
  1048. config HZ
  1049. int
  1050. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || \
  1051. ARCH_S5P6442 || ARCH_S5PV210 || ARCH_S5PV310
  1052. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1053. default AT91_TIMER_HZ if ARCH_AT91
  1054. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1055. default 100
  1056. config THUMB2_KERNEL
  1057. bool "Compile the kernel in Thumb-2 mode"
  1058. depends on CPU_V7 && EXPERIMENTAL
  1059. select AEABI
  1060. select ARM_ASM_UNIFIED
  1061. help
  1062. By enabling this option, the kernel will be compiled in
  1063. Thumb-2 mode. A compiler/assembler that understand the unified
  1064. ARM-Thumb syntax is needed.
  1065. If unsure, say N.
  1066. config ARM_ASM_UNIFIED
  1067. bool
  1068. config AEABI
  1069. bool "Use the ARM EABI to compile the kernel"
  1070. help
  1071. This option allows for the kernel to be compiled using the latest
  1072. ARM ABI (aka EABI). This is only useful if you are using a user
  1073. space environment that is also compiled with EABI.
  1074. Since there are major incompatibilities between the legacy ABI and
  1075. EABI, especially with regard to structure member alignment, this
  1076. option also changes the kernel syscall calling convention to
  1077. disambiguate both ABIs and allow for backward compatibility support
  1078. (selected with CONFIG_OABI_COMPAT).
  1079. To use this you need GCC version 4.0.0 or later.
  1080. config OABI_COMPAT
  1081. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1082. depends on AEABI && EXPERIMENTAL
  1083. default y
  1084. help
  1085. This option preserves the old syscall interface along with the
  1086. new (ARM EABI) one. It also provides a compatibility layer to
  1087. intercept syscalls that have structure arguments which layout
  1088. in memory differs between the legacy ABI and the new ARM EABI
  1089. (only for non "thumb" binaries). This option adds a tiny
  1090. overhead to all syscalls and produces a slightly larger kernel.
  1091. If you know you'll be using only pure EABI user space then you
  1092. can say N here. If this option is not selected and you attempt
  1093. to execute a legacy ABI binary then the result will be
  1094. UNPREDICTABLE (in fact it can be predicted that it won't work
  1095. at all). If in doubt say Y.
  1096. config ARCH_HAS_HOLES_MEMORYMODEL
  1097. bool
  1098. config ARCH_SPARSEMEM_ENABLE
  1099. bool
  1100. config ARCH_SPARSEMEM_DEFAULT
  1101. def_bool ARCH_SPARSEMEM_ENABLE
  1102. config ARCH_SELECT_MEMORY_MODEL
  1103. def_bool ARCH_SPARSEMEM_ENABLE
  1104. config HIGHMEM
  1105. bool "High Memory Support (EXPERIMENTAL)"
  1106. depends on MMU && EXPERIMENTAL
  1107. help
  1108. The address space of ARM processors is only 4 Gigabytes large
  1109. and it has to accommodate user address space, kernel address
  1110. space as well as some memory mapped IO. That means that, if you
  1111. have a large amount of physical memory and/or IO, not all of the
  1112. memory can be "permanently mapped" by the kernel. The physical
  1113. memory that is not permanently mapped is called "high memory".
  1114. Depending on the selected kernel/user memory split, minimum
  1115. vmalloc space and actual amount of RAM, you may not need this
  1116. option which should result in a slightly faster kernel.
  1117. If unsure, say n.
  1118. config HIGHPTE
  1119. bool "Allocate 2nd-level pagetables from highmem"
  1120. depends on HIGHMEM
  1121. depends on !OUTER_CACHE
  1122. config HW_PERF_EVENTS
  1123. bool "Enable hardware performance counter support for perf events"
  1124. depends on PERF_EVENTS && CPU_HAS_PMU
  1125. default y
  1126. help
  1127. Enable hardware performance counter support for perf events. If
  1128. disabled, perf events will use software events only.
  1129. config SPARSE_IRQ
  1130. def_bool n
  1131. help
  1132. This enables support for sparse irqs. This is useful in general
  1133. as most CPUs have a fairly sparse array of IRQ vectors, which
  1134. the irq_desc then maps directly on to. Systems with a high
  1135. number of off-chip IRQs will want to treat this as
  1136. experimental until they have been independently verified.
  1137. source "mm/Kconfig"
  1138. config FORCE_MAX_ZONEORDER
  1139. int "Maximum zone order" if ARCH_SHMOBILE
  1140. range 11 64 if ARCH_SHMOBILE
  1141. default "9" if SA1111
  1142. default "11"
  1143. help
  1144. The kernel memory allocator divides physically contiguous memory
  1145. blocks into "zones", where each zone is a power of two number of
  1146. pages. This option selects the largest power of two that the kernel
  1147. keeps in the memory allocator. If you need to allocate very large
  1148. blocks of physically contiguous memory, then you may need to
  1149. increase this value.
  1150. This config option is actually maximum order plus one. For example,
  1151. a value of 11 means that the largest free memory block is 2^10 pages.
  1152. config LEDS
  1153. bool "Timer and CPU usage LEDs"
  1154. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1155. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1156. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1157. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1158. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1159. ARCH_AT91 || ARCH_DAVINCI || \
  1160. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1161. help
  1162. If you say Y here, the LEDs on your machine will be used
  1163. to provide useful information about your current system status.
  1164. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1165. be able to select which LEDs are active using the options below. If
  1166. you are compiling a kernel for the EBSA-110 or the LART however, the
  1167. red LED will simply flash regularly to indicate that the system is
  1168. still functional. It is safe to say Y here if you have a CATS
  1169. system, but the driver will do nothing.
  1170. config LEDS_TIMER
  1171. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1172. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1173. || MACH_OMAP_PERSEUS2
  1174. depends on LEDS
  1175. depends on !GENERIC_CLOCKEVENTS
  1176. default y if ARCH_EBSA110
  1177. help
  1178. If you say Y here, one of the system LEDs (the green one on the
  1179. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1180. will flash regularly to indicate that the system is still
  1181. operational. This is mainly useful to kernel hackers who are
  1182. debugging unstable kernels.
  1183. The LART uses the same LED for both Timer LED and CPU usage LED
  1184. functions. You may choose to use both, but the Timer LED function
  1185. will overrule the CPU usage LED.
  1186. config LEDS_CPU
  1187. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1188. !ARCH_OMAP) \
  1189. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1190. || MACH_OMAP_PERSEUS2
  1191. depends on LEDS
  1192. help
  1193. If you say Y here, the red LED will be used to give a good real
  1194. time indication of CPU usage, by lighting whenever the idle task
  1195. is not currently executing.
  1196. The LART uses the same LED for both Timer LED and CPU usage LED
  1197. functions. You may choose to use both, but the Timer LED function
  1198. will overrule the CPU usage LED.
  1199. config ALIGNMENT_TRAP
  1200. bool
  1201. depends on CPU_CP15_MMU
  1202. default y if !ARCH_EBSA110
  1203. select HAVE_PROC_CPU if PROC_FS
  1204. help
  1205. ARM processors cannot fetch/store information which is not
  1206. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1207. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1208. fetch/store instructions will be emulated in software if you say
  1209. here, which has a severe performance impact. This is necessary for
  1210. correct operation of some network protocols. With an IP-only
  1211. configuration it is safe to say N, otherwise say Y.
  1212. config UACCESS_WITH_MEMCPY
  1213. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1214. depends on MMU && EXPERIMENTAL
  1215. default y if CPU_FEROCEON
  1216. help
  1217. Implement faster copy_to_user and clear_user methods for CPU
  1218. cores where a 8-word STM instruction give significantly higher
  1219. memory write throughput than a sequence of individual 32bit stores.
  1220. A possible side effect is a slight increase in scheduling latency
  1221. between threads sharing the same address space if they invoke
  1222. such copy operations with large buffers.
  1223. However, if the CPU data cache is using a write-allocate mode,
  1224. this option is unlikely to provide any performance gain.
  1225. config CC_STACKPROTECTOR
  1226. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1227. help
  1228. This option turns on the -fstack-protector GCC feature. This
  1229. feature puts, at the beginning of functions, a canary value on
  1230. the stack just before the return address, and validates
  1231. the value just before actually returning. Stack based buffer
  1232. overflows (that need to overwrite this return address) now also
  1233. overwrite the canary, which gets detected and the attack is then
  1234. neutralized via a kernel panic.
  1235. This feature requires gcc version 4.2 or above.
  1236. config DEPRECATED_PARAM_STRUCT
  1237. bool "Provide old way to pass kernel parameters"
  1238. help
  1239. This was deprecated in 2001 and announced to live on for 5 years.
  1240. Some old boot loaders still use this way.
  1241. endmenu
  1242. menu "Boot options"
  1243. # Compressed boot loader in ROM. Yes, we really want to ask about
  1244. # TEXT and BSS so we preserve their values in the config files.
  1245. config ZBOOT_ROM_TEXT
  1246. hex "Compressed ROM boot loader base address"
  1247. default "0"
  1248. help
  1249. The physical address at which the ROM-able zImage is to be
  1250. placed in the target. Platforms which normally make use of
  1251. ROM-able zImage formats normally set this to a suitable
  1252. value in their defconfig file.
  1253. If ZBOOT_ROM is not enabled, this has no effect.
  1254. config ZBOOT_ROM_BSS
  1255. hex "Compressed ROM boot loader BSS address"
  1256. default "0"
  1257. help
  1258. The base address of an area of read/write memory in the target
  1259. for the ROM-able zImage which must be available while the
  1260. decompressor is running. It must be large enough to hold the
  1261. entire decompressed kernel plus an additional 128 KiB.
  1262. Platforms which normally make use of ROM-able zImage formats
  1263. normally set this to a suitable value in their defconfig file.
  1264. If ZBOOT_ROM is not enabled, this has no effect.
  1265. config ZBOOT_ROM
  1266. bool "Compressed boot loader in ROM/flash"
  1267. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1268. help
  1269. Say Y here if you intend to execute your compressed kernel image
  1270. (zImage) directly from ROM or flash. If unsure, say N.
  1271. config CMDLINE
  1272. string "Default kernel command string"
  1273. default ""
  1274. help
  1275. On some architectures (EBSA110 and CATS), there is currently no way
  1276. for the boot loader to pass arguments to the kernel. For these
  1277. architectures, you should supply some command-line options at build
  1278. time by entering them here. As a minimum, you should specify the
  1279. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1280. config CMDLINE_FORCE
  1281. bool "Always use the default kernel command string"
  1282. depends on CMDLINE != ""
  1283. help
  1284. Always use the default kernel command string, even if the boot
  1285. loader passes other arguments to the kernel.
  1286. This is useful if you cannot or don't want to change the
  1287. command-line options your boot loader passes to the kernel.
  1288. If unsure, say N.
  1289. config XIP_KERNEL
  1290. bool "Kernel Execute-In-Place from ROM"
  1291. depends on !ZBOOT_ROM
  1292. help
  1293. Execute-In-Place allows the kernel to run from non-volatile storage
  1294. directly addressable by the CPU, such as NOR flash. This saves RAM
  1295. space since the text section of the kernel is not loaded from flash
  1296. to RAM. Read-write sections, such as the data section and stack,
  1297. are still copied to RAM. The XIP kernel is not compressed since
  1298. it has to run directly from flash, so it will take more space to
  1299. store it. The flash address used to link the kernel object files,
  1300. and for storing it, is configuration dependent. Therefore, if you
  1301. say Y here, you must know the proper physical address where to
  1302. store the kernel image depending on your own flash memory usage.
  1303. Also note that the make target becomes "make xipImage" rather than
  1304. "make zImage" or "make Image". The final kernel binary to put in
  1305. ROM memory will be arch/arm/boot/xipImage.
  1306. If unsure, say N.
  1307. config XIP_PHYS_ADDR
  1308. hex "XIP Kernel Physical Location"
  1309. depends on XIP_KERNEL
  1310. default "0x00080000"
  1311. help
  1312. This is the physical address in your flash memory the kernel will
  1313. be linked for and stored to. This address is dependent on your
  1314. own flash usage.
  1315. config KEXEC
  1316. bool "Kexec system call (EXPERIMENTAL)"
  1317. depends on EXPERIMENTAL
  1318. help
  1319. kexec is a system call that implements the ability to shutdown your
  1320. current kernel, and to start another kernel. It is like a reboot
  1321. but it is independent of the system firmware. And like a reboot
  1322. you can start any kernel with it, not just Linux.
  1323. It is an ongoing process to be certain the hardware in a machine
  1324. is properly shutdown, so do not be surprised if this code does not
  1325. initially work for you. It may help to enable device hotplugging
  1326. support.
  1327. config ATAGS_PROC
  1328. bool "Export atags in procfs"
  1329. depends on KEXEC
  1330. default y
  1331. help
  1332. Should the atags used to boot the kernel be exported in an "atags"
  1333. file in procfs. Useful with kexec.
  1334. config AUTO_ZRELADDR
  1335. bool "Auto calculation of the decompressed kernel image address"
  1336. depends on !ZBOOT_ROM && !ARCH_U300
  1337. help
  1338. ZRELADDR is the physical address where the decompressed kernel
  1339. image will be placed. If AUTO_ZRELADDR is selected, the address
  1340. will be determined at run-time by masking the current IP with
  1341. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1342. from start of memory.
  1343. endmenu
  1344. menu "CPU Power Management"
  1345. if ARCH_HAS_CPUFREQ
  1346. source "drivers/cpufreq/Kconfig"
  1347. config CPU_FREQ_SA1100
  1348. bool
  1349. config CPU_FREQ_SA1110
  1350. bool
  1351. config CPU_FREQ_INTEGRATOR
  1352. tristate "CPUfreq driver for ARM Integrator CPUs"
  1353. depends on ARCH_INTEGRATOR && CPU_FREQ
  1354. default y
  1355. help
  1356. This enables the CPUfreq driver for ARM Integrator CPUs.
  1357. For details, take a look at <file:Documentation/cpu-freq>.
  1358. If in doubt, say Y.
  1359. config CPU_FREQ_PXA
  1360. bool
  1361. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1362. default y
  1363. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1364. config CPU_FREQ_S3C64XX
  1365. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1366. depends on CPU_FREQ && CPU_S3C6410
  1367. config CPU_FREQ_S3C
  1368. bool
  1369. help
  1370. Internal configuration node for common cpufreq on Samsung SoC
  1371. config CPU_FREQ_S3C24XX
  1372. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1373. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1374. select CPU_FREQ_S3C
  1375. help
  1376. This enables the CPUfreq driver for the Samsung S3C24XX family
  1377. of CPUs.
  1378. For details, take a look at <file:Documentation/cpu-freq>.
  1379. If in doubt, say N.
  1380. config CPU_FREQ_S3C24XX_PLL
  1381. bool "Support CPUfreq changing of PLL frequency"
  1382. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1383. help
  1384. Compile in support for changing the PLL frequency from the
  1385. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1386. after a frequency change, so by default it is not enabled.
  1387. This also means that the PLL tables for the selected CPU(s) will
  1388. be built which may increase the size of the kernel image.
  1389. config CPU_FREQ_S3C24XX_DEBUG
  1390. bool "Debug CPUfreq Samsung driver core"
  1391. depends on CPU_FREQ_S3C24XX
  1392. help
  1393. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1394. config CPU_FREQ_S3C24XX_IODEBUG
  1395. bool "Debug CPUfreq Samsung driver IO timing"
  1396. depends on CPU_FREQ_S3C24XX
  1397. help
  1398. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1399. config CPU_FREQ_S3C24XX_DEBUGFS
  1400. bool "Export debugfs for CPUFreq"
  1401. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1402. help
  1403. Export status information via debugfs.
  1404. endif
  1405. source "drivers/cpuidle/Kconfig"
  1406. endmenu
  1407. menu "Floating point emulation"
  1408. comment "At least one emulation must be selected"
  1409. config FPE_NWFPE
  1410. bool "NWFPE math emulation"
  1411. depends on !AEABI || OABI_COMPAT
  1412. ---help---
  1413. Say Y to include the NWFPE floating point emulator in the kernel.
  1414. This is necessary to run most binaries. Linux does not currently
  1415. support floating point hardware so you need to say Y here even if
  1416. your machine has an FPA or floating point co-processor podule.
  1417. You may say N here if you are going to load the Acorn FPEmulator
  1418. early in the bootup.
  1419. config FPE_NWFPE_XP
  1420. bool "Support extended precision"
  1421. depends on FPE_NWFPE
  1422. help
  1423. Say Y to include 80-bit support in the kernel floating-point
  1424. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1425. Note that gcc does not generate 80-bit operations by default,
  1426. so in most cases this option only enlarges the size of the
  1427. floating point emulator without any good reason.
  1428. You almost surely want to say N here.
  1429. config FPE_FASTFPE
  1430. bool "FastFPE math emulation (EXPERIMENTAL)"
  1431. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1432. ---help---
  1433. Say Y here to include the FAST floating point emulator in the kernel.
  1434. This is an experimental much faster emulator which now also has full
  1435. precision for the mantissa. It does not support any exceptions.
  1436. It is very simple, and approximately 3-6 times faster than NWFPE.
  1437. It should be sufficient for most programs. It may be not suitable
  1438. for scientific calculations, but you have to check this for yourself.
  1439. If you do not feel you need a faster FP emulation you should better
  1440. choose NWFPE.
  1441. config VFP
  1442. bool "VFP-format floating point maths"
  1443. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1444. help
  1445. Say Y to include VFP support code in the kernel. This is needed
  1446. if your hardware includes a VFP unit.
  1447. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1448. release notes and additional status information.
  1449. Say N if your target does not have VFP hardware.
  1450. config VFPv3
  1451. bool
  1452. depends on VFP
  1453. default y if CPU_V7
  1454. config NEON
  1455. bool "Advanced SIMD (NEON) Extension support"
  1456. depends on VFPv3 && CPU_V7
  1457. help
  1458. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1459. Extension.
  1460. endmenu
  1461. menu "Userspace binary formats"
  1462. source "fs/Kconfig.binfmt"
  1463. config ARTHUR
  1464. tristate "RISC OS personality"
  1465. depends on !AEABI
  1466. help
  1467. Say Y here to include the kernel code necessary if you want to run
  1468. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1469. experimental; if this sounds frightening, say N and sleep in peace.
  1470. You can also say M here to compile this support as a module (which
  1471. will be called arthur).
  1472. endmenu
  1473. menu "Power management options"
  1474. source "kernel/power/Kconfig"
  1475. config ARCH_SUSPEND_POSSIBLE
  1476. def_bool y
  1477. endmenu
  1478. source "net/Kconfig"
  1479. source "drivers/Kconfig"
  1480. source "fs/Kconfig"
  1481. source "arch/arm/Kconfig.debug"
  1482. source "security/Kconfig"
  1483. source "crypto/Kconfig"
  1484. source "lib/Kconfig"