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. select SPARSE_IRQ
  438. help
  439. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  440. config ARCH_KS8695
  441. bool "Micrel/Kendin KS8695"
  442. select CPU_ARM922T
  443. select ARCH_REQUIRE_GPIOLIB
  444. select ARCH_USES_GETTIMEOFFSET
  445. help
  446. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  447. System-on-Chip devices.
  448. config ARCH_NS9XXX
  449. bool "NetSilicon NS9xxx"
  450. select CPU_ARM926T
  451. select GENERIC_GPIO
  452. select GENERIC_CLOCKEVENTS
  453. select HAVE_CLK
  454. help
  455. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  456. System.
  457. <http://www.digi.com/products/microprocessors/index.jsp>
  458. config ARCH_W90X900
  459. bool "Nuvoton W90X900 CPU"
  460. select CPU_ARM926T
  461. select ARCH_REQUIRE_GPIOLIB
  462. select COMMON_CLKDEV
  463. select GENERIC_CLOCKEVENTS
  464. help
  465. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  466. At present, the w90x900 has been renamed nuc900, regarding
  467. the ARM series product line, you can login the following
  468. link address to know more.
  469. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  470. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  471. config ARCH_NUC93X
  472. bool "Nuvoton NUC93X CPU"
  473. select CPU_ARM926T
  474. select COMMON_CLKDEV
  475. help
  476. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  477. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  478. config ARCH_TEGRA
  479. bool "NVIDIA Tegra"
  480. select GENERIC_TIME
  481. select GENERIC_CLOCKEVENTS
  482. select GENERIC_GPIO
  483. select HAVE_CLK
  484. select COMMON_CLKDEV
  485. select ARCH_HAS_BARRIERS if CACHE_L2X0
  486. help
  487. This enables support for NVIDIA Tegra based systems (Tegra APX,
  488. Tegra 6xx and Tegra 2 series).
  489. config ARCH_PNX4008
  490. bool "Philips Nexperia PNX4008 Mobile"
  491. select CPU_ARM926T
  492. select COMMON_CLKDEV
  493. select ARCH_USES_GETTIMEOFFSET
  494. help
  495. This enables support for Philips PNX4008 mobile platform.
  496. config ARCH_PXA
  497. bool "PXA2xx/PXA3xx-based"
  498. depends on MMU
  499. select ARCH_MTD_XIP
  500. select ARCH_HAS_CPUFREQ
  501. select COMMON_CLKDEV
  502. select ARCH_REQUIRE_GPIOLIB
  503. select GENERIC_CLOCKEVENTS
  504. select TICK_ONESHOT
  505. select PLAT_PXA
  506. select SPARSE_IRQ
  507. help
  508. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  509. config ARCH_MSM
  510. bool "Qualcomm MSM"
  511. select HAVE_CLK
  512. select GENERIC_CLOCKEVENTS
  513. select ARCH_REQUIRE_GPIOLIB
  514. help
  515. Support for Qualcomm MSM/QSD based systems. This runs on the
  516. apps processor of the MSM/QSD and depends on a shared memory
  517. interface to the modem processor which runs the baseband
  518. stack and controls some vital subsystems
  519. (clock and power control, etc).
  520. config ARCH_SHMOBILE
  521. bool "Renesas SH-Mobile"
  522. help
  523. Support for Renesas's SH-Mobile ARM platforms
  524. config ARCH_RPC
  525. bool "RiscPC"
  526. select ARCH_ACORN
  527. select FIQ
  528. select TIMER_ACORN
  529. select ARCH_MAY_HAVE_PC_FDC
  530. select HAVE_PATA_PLATFORM
  531. select ISA_DMA_API
  532. select NO_IOPORT
  533. select ARCH_SPARSEMEM_ENABLE
  534. select ARCH_USES_GETTIMEOFFSET
  535. help
  536. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  537. CD-ROM interface, serial and parallel port, and the floppy drive.
  538. config ARCH_SA1100
  539. bool "SA1100-based"
  540. select CPU_SA1100
  541. select ISA
  542. select ARCH_SPARSEMEM_ENABLE
  543. select ARCH_MTD_XIP
  544. select ARCH_HAS_CPUFREQ
  545. select CPU_FREQ
  546. select GENERIC_CLOCKEVENTS
  547. select HAVE_CLK
  548. select TICK_ONESHOT
  549. select ARCH_REQUIRE_GPIOLIB
  550. help
  551. Support for StrongARM 11x0 based boards.
  552. config ARCH_S3C2410
  553. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  554. select GENERIC_GPIO
  555. select ARCH_HAS_CPUFREQ
  556. select HAVE_CLK
  557. select ARCH_USES_GETTIMEOFFSET
  558. select HAVE_S3C2410_I2C
  559. help
  560. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  561. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  562. the Samsung SMDK2410 development board (and derivatives).
  563. Note, the S3C2416 and the S3C2450 are so close that they even share
  564. the same SoC ID code. This means that there is no seperate machine
  565. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  566. config ARCH_S3C64XX
  567. bool "Samsung S3C64XX"
  568. select PLAT_SAMSUNG
  569. select CPU_V6
  570. select ARM_VIC
  571. select HAVE_CLK
  572. select NO_IOPORT
  573. select ARCH_USES_GETTIMEOFFSET
  574. select ARCH_HAS_CPUFREQ
  575. select ARCH_REQUIRE_GPIOLIB
  576. select SAMSUNG_CLKSRC
  577. select SAMSUNG_IRQ_VIC_TIMER
  578. select SAMSUNG_IRQ_UART
  579. select S3C_GPIO_TRACK
  580. select S3C_GPIO_PULL_UPDOWN
  581. select S3C_GPIO_CFG_S3C24XX
  582. select S3C_GPIO_CFG_S3C64XX
  583. select S3C_DEV_NAND
  584. select USB_ARCH_HAS_OHCI
  585. select SAMSUNG_GPIOLIB_4BIT
  586. select HAVE_S3C2410_I2C
  587. select HAVE_S3C2410_WATCHDOG
  588. help
  589. Samsung S3C64XX series based systems
  590. config ARCH_S5P6440
  591. bool "Samsung S5P6440"
  592. select CPU_V6
  593. select GENERIC_GPIO
  594. select HAVE_CLK
  595. select HAVE_S3C2410_WATCHDOG
  596. select ARCH_USES_GETTIMEOFFSET
  597. select HAVE_S3C2410_I2C
  598. select HAVE_S3C_RTC
  599. help
  600. Samsung S5P6440 CPU based systems
  601. config ARCH_S5P6442
  602. bool "Samsung S5P6442"
  603. select CPU_V6
  604. select GENERIC_GPIO
  605. select HAVE_CLK
  606. select ARCH_USES_GETTIMEOFFSET
  607. select HAVE_S3C2410_WATCHDOG
  608. help
  609. Samsung S5P6442 CPU based systems
  610. config ARCH_S5PC100
  611. bool "Samsung S5PC100"
  612. select GENERIC_GPIO
  613. select HAVE_CLK
  614. select CPU_V7
  615. select ARM_L1_CACHE_SHIFT_6
  616. select ARCH_USES_GETTIMEOFFSET
  617. select HAVE_S3C2410_I2C
  618. select HAVE_S3C_RTC
  619. select HAVE_S3C2410_WATCHDOG
  620. help
  621. Samsung S5PC100 series based systems
  622. config ARCH_S5PV210
  623. bool "Samsung S5PV210/S5PC110"
  624. select CPU_V7
  625. select GENERIC_GPIO
  626. select HAVE_CLK
  627. select ARM_L1_CACHE_SHIFT_6
  628. select ARCH_USES_GETTIMEOFFSET
  629. select HAVE_S3C2410_I2C
  630. select HAVE_S3C_RTC
  631. select HAVE_S3C2410_WATCHDOG
  632. help
  633. Samsung S5PV210/S5PC110 series based systems
  634. config ARCH_S5PV310
  635. bool "Samsung S5PV310/S5PC210"
  636. select CPU_V7
  637. select GENERIC_GPIO
  638. select HAVE_CLK
  639. select GENERIC_CLOCKEVENTS
  640. help
  641. Samsung S5PV310 series based systems
  642. config ARCH_SHARK
  643. bool "Shark"
  644. select CPU_SA110
  645. select ISA
  646. select ISA_DMA
  647. select ZONE_DMA
  648. select PCI
  649. select ARCH_USES_GETTIMEOFFSET
  650. help
  651. Support for the StrongARM based Digital DNARD machine, also known
  652. as "Shark" (<http://www.shark-linux.de/shark.html>).
  653. config ARCH_LH7A40X
  654. bool "Sharp LH7A40X"
  655. select CPU_ARM922T
  656. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  657. select ARCH_USES_GETTIMEOFFSET
  658. help
  659. Say Y here for systems based on one of the Sharp LH7A40X
  660. System on a Chip processors. These CPUs include an ARM922T
  661. core with a wide array of integrated devices for
  662. hand-held and low-power applications.
  663. config ARCH_U300
  664. bool "ST-Ericsson U300 Series"
  665. depends on MMU
  666. select CPU_ARM926T
  667. select HAVE_TCM
  668. select ARM_AMBA
  669. select ARM_VIC
  670. select GENERIC_CLOCKEVENTS
  671. select COMMON_CLKDEV
  672. select GENERIC_GPIO
  673. help
  674. Support for ST-Ericsson U300 series mobile platforms.
  675. config ARCH_U8500
  676. bool "ST-Ericsson U8500 Series"
  677. select CPU_V7
  678. select ARM_AMBA
  679. select GENERIC_CLOCKEVENTS
  680. select COMMON_CLKDEV
  681. select ARCH_REQUIRE_GPIOLIB
  682. help
  683. Support for ST-Ericsson's Ux500 architecture
  684. config ARCH_NOMADIK
  685. bool "STMicroelectronics Nomadik"
  686. select ARM_AMBA
  687. select ARM_VIC
  688. select CPU_ARM926T
  689. select COMMON_CLKDEV
  690. select GENERIC_CLOCKEVENTS
  691. select ARCH_REQUIRE_GPIOLIB
  692. help
  693. Support for the Nomadik platform by ST-Ericsson
  694. config ARCH_DAVINCI
  695. bool "TI DaVinci"
  696. select GENERIC_CLOCKEVENTS
  697. select ARCH_REQUIRE_GPIOLIB
  698. select ZONE_DMA
  699. select HAVE_IDE
  700. select COMMON_CLKDEV
  701. select GENERIC_ALLOCATOR
  702. select ARCH_HAS_HOLES_MEMORYMODEL
  703. help
  704. Support for TI's DaVinci platform.
  705. config ARCH_OMAP
  706. bool "TI OMAP"
  707. select HAVE_CLK
  708. select ARCH_REQUIRE_GPIOLIB
  709. select ARCH_HAS_CPUFREQ
  710. select GENERIC_CLOCKEVENTS
  711. select ARCH_HAS_HOLES_MEMORYMODEL
  712. help
  713. Support for TI's OMAP platform (OMAP1 and OMAP2).
  714. config PLAT_SPEAR
  715. bool "ST SPEAr"
  716. select ARM_AMBA
  717. select ARCH_REQUIRE_GPIOLIB
  718. select COMMON_CLKDEV
  719. select GENERIC_CLOCKEVENTS
  720. select HAVE_CLK
  721. help
  722. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  723. endchoice
  724. #
  725. # This is sorted alphabetically by mach-* pathname. However, plat-*
  726. # Kconfigs may be included either alphabetically (according to the
  727. # plat- suffix) or along side the corresponding mach-* source.
  728. #
  729. source "arch/arm/mach-aaec2000/Kconfig"
  730. source "arch/arm/mach-at91/Kconfig"
  731. source "arch/arm/mach-bcmring/Kconfig"
  732. source "arch/arm/mach-clps711x/Kconfig"
  733. source "arch/arm/mach-cns3xxx/Kconfig"
  734. source "arch/arm/mach-davinci/Kconfig"
  735. source "arch/arm/mach-dove/Kconfig"
  736. source "arch/arm/mach-ep93xx/Kconfig"
  737. source "arch/arm/mach-footbridge/Kconfig"
  738. source "arch/arm/mach-gemini/Kconfig"
  739. source "arch/arm/mach-h720x/Kconfig"
  740. source "arch/arm/mach-integrator/Kconfig"
  741. source "arch/arm/mach-iop32x/Kconfig"
  742. source "arch/arm/mach-iop33x/Kconfig"
  743. source "arch/arm/mach-iop13xx/Kconfig"
  744. source "arch/arm/mach-ixp4xx/Kconfig"
  745. source "arch/arm/mach-ixp2000/Kconfig"
  746. source "arch/arm/mach-ixp23xx/Kconfig"
  747. source "arch/arm/mach-kirkwood/Kconfig"
  748. source "arch/arm/mach-ks8695/Kconfig"
  749. source "arch/arm/mach-lh7a40x/Kconfig"
  750. source "arch/arm/mach-loki/Kconfig"
  751. source "arch/arm/mach-lpc32xx/Kconfig"
  752. source "arch/arm/mach-msm/Kconfig"
  753. source "arch/arm/mach-mv78xx0/Kconfig"
  754. source "arch/arm/plat-mxc/Kconfig"
  755. source "arch/arm/mach-netx/Kconfig"
  756. source "arch/arm/mach-nomadik/Kconfig"
  757. source "arch/arm/plat-nomadik/Kconfig"
  758. source "arch/arm/mach-ns9xxx/Kconfig"
  759. source "arch/arm/mach-nuc93x/Kconfig"
  760. source "arch/arm/plat-omap/Kconfig"
  761. source "arch/arm/mach-omap1/Kconfig"
  762. source "arch/arm/mach-omap2/Kconfig"
  763. source "arch/arm/mach-orion5x/Kconfig"
  764. source "arch/arm/mach-pxa/Kconfig"
  765. source "arch/arm/plat-pxa/Kconfig"
  766. source "arch/arm/mach-mmp/Kconfig"
  767. source "arch/arm/mach-realview/Kconfig"
  768. source "arch/arm/mach-sa1100/Kconfig"
  769. source "arch/arm/plat-samsung/Kconfig"
  770. source "arch/arm/plat-s3c24xx/Kconfig"
  771. source "arch/arm/plat-s5p/Kconfig"
  772. source "arch/arm/plat-spear/Kconfig"
  773. if ARCH_S3C2410
  774. source "arch/arm/mach-s3c2400/Kconfig"
  775. source "arch/arm/mach-s3c2410/Kconfig"
  776. source "arch/arm/mach-s3c2412/Kconfig"
  777. source "arch/arm/mach-s3c2416/Kconfig"
  778. source "arch/arm/mach-s3c2440/Kconfig"
  779. source "arch/arm/mach-s3c2443/Kconfig"
  780. endif
  781. if ARCH_S3C64XX
  782. source "arch/arm/mach-s3c64xx/Kconfig"
  783. endif
  784. source "arch/arm/mach-s5p6440/Kconfig"
  785. source "arch/arm/mach-s5p6442/Kconfig"
  786. source "arch/arm/mach-s5pc100/Kconfig"
  787. source "arch/arm/mach-s5pv210/Kconfig"
  788. source "arch/arm/mach-s5pv310/Kconfig"
  789. source "arch/arm/mach-shmobile/Kconfig"
  790. source "arch/arm/plat-stmp3xxx/Kconfig"
  791. source "arch/arm/mach-tegra/Kconfig"
  792. source "arch/arm/mach-u300/Kconfig"
  793. source "arch/arm/mach-ux500/Kconfig"
  794. source "arch/arm/mach-versatile/Kconfig"
  795. source "arch/arm/mach-vexpress/Kconfig"
  796. source "arch/arm/mach-w90x900/Kconfig"
  797. # Definitions to make life easier
  798. config ARCH_ACORN
  799. bool
  800. config PLAT_IOP
  801. bool
  802. select GENERIC_CLOCKEVENTS
  803. config PLAT_ORION
  804. bool
  805. config PLAT_PXA
  806. bool
  807. config PLAT_VERSATILE
  808. bool
  809. config ARM_TIMER_SP804
  810. bool
  811. source arch/arm/mm/Kconfig
  812. config IWMMXT
  813. bool "Enable iWMMXt support"
  814. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  815. default y if PXA27x || PXA3xx || ARCH_MMP
  816. help
  817. Enable support for iWMMXt context switching at run time if
  818. running on a CPU that supports it.
  819. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  820. config XSCALE_PMU
  821. bool
  822. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  823. default y
  824. config CPU_HAS_PMU
  825. depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
  826. (!ARCH_OMAP3 || OMAP3_EMU)
  827. default y
  828. bool
  829. if !MMU
  830. source "arch/arm/Kconfig-nommu"
  831. endif
  832. config ARM_ERRATA_411920
  833. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  834. depends on CPU_V6 && !SMP
  835. help
  836. Invalidation of the Instruction Cache operation can
  837. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  838. It does not affect the MPCore. This option enables the ARM Ltd.
  839. recommended workaround.
  840. config ARM_ERRATA_430973
  841. bool "ARM errata: Stale prediction on replaced interworking branch"
  842. depends on CPU_V7
  843. help
  844. This option enables the workaround for the 430973 Cortex-A8
  845. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  846. interworking branch is replaced with another code sequence at the
  847. same virtual address, whether due to self-modifying code or virtual
  848. to physical address re-mapping, Cortex-A8 does not recover from the
  849. stale interworking branch prediction. This results in Cortex-A8
  850. executing the new code sequence in the incorrect ARM or Thumb state.
  851. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  852. and also flushes the branch target cache at every context switch.
  853. Note that setting specific bits in the ACTLR register may not be
  854. available in non-secure mode.
  855. config ARM_ERRATA_458693
  856. bool "ARM errata: Processor deadlock when a false hazard is created"
  857. depends on CPU_V7
  858. help
  859. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  860. erratum. For very specific sequences of memory operations, it is
  861. possible for a hazard condition intended for a cache line to instead
  862. be incorrectly associated with a different cache line. This false
  863. hazard might then cause a processor deadlock. The workaround enables
  864. the L1 caching of the NEON accesses and disables the PLD instruction
  865. in the ACTLR register. Note that setting specific bits in the ACTLR
  866. register may not be available in non-secure mode.
  867. config ARM_ERRATA_460075
  868. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  869. depends on CPU_V7
  870. help
  871. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  872. erratum. Any asynchronous access to the L2 cache may encounter a
  873. situation in which recent store transactions to the L2 cache are lost
  874. and overwritten with stale memory contents from external memory. The
  875. workaround disables the write-allocate mode for the L2 cache via the
  876. ACTLR register. Note that setting specific bits in the ACTLR register
  877. may not be available in non-secure mode.
  878. config ARM_ERRATA_742230
  879. bool "ARM errata: DMB operation may be faulty"
  880. depends on CPU_V7 && SMP
  881. help
  882. This option enables the workaround for the 742230 Cortex-A9
  883. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  884. between two write operations may not ensure the correct visibility
  885. ordering of the two writes. This workaround sets a specific bit in
  886. the diagnostic register of the Cortex-A9 which causes the DMB
  887. instruction to behave as a DSB, ensuring the correct behaviour of
  888. the two writes.
  889. config ARM_ERRATA_742231
  890. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  891. depends on CPU_V7 && SMP
  892. help
  893. This option enables the workaround for the 742231 Cortex-A9
  894. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  895. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  896. accessing some data located in the same cache line, may get corrupted
  897. data due to bad handling of the address hazard when the line gets
  898. replaced from one of the CPUs at the same time as another CPU is
  899. accessing it. This workaround sets specific bits in the diagnostic
  900. register of the Cortex-A9 which reduces the linefill issuing
  901. capabilities of the processor.
  902. config PL310_ERRATA_588369
  903. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  904. depends on CACHE_L2X0 && ARCH_OMAP4
  905. help
  906. The PL310 L2 cache controller implements three types of Clean &
  907. Invalidate maintenance operations: by Physical Address
  908. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  909. They are architecturally defined to behave as the execution of a
  910. clean operation followed immediately by an invalidate operation,
  911. both performing to the same memory location. This functionality
  912. is not correctly implemented in PL310 as clean lines are not
  913. invalidated as a result of these operations. Note that this errata
  914. uses Texas Instrument's secure monitor api.
  915. config ARM_ERRATA_720789
  916. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  917. depends on CPU_V7 && SMP
  918. help
  919. This option enables the workaround for the 720789 Cortex-A9 (prior to
  920. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  921. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  922. As a consequence of this erratum, some TLB entries which should be
  923. invalidated are not, resulting in an incoherency in the system page
  924. tables. The workaround changes the TLB flushing routines to invalidate
  925. entries regardless of the ASID.
  926. endmenu
  927. source "arch/arm/common/Kconfig"
  928. menu "Bus support"
  929. config ARM_AMBA
  930. bool
  931. config ISA
  932. bool
  933. help
  934. Find out whether you have ISA slots on your motherboard. ISA is the
  935. name of a bus system, i.e. the way the CPU talks to the other stuff
  936. inside your box. Other bus systems are PCI, EISA, MicroChannel
  937. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  938. newer boards don't support it. If you have ISA, say Y, otherwise N.
  939. # Select ISA DMA controller support
  940. config ISA_DMA
  941. bool
  942. select ISA_DMA_API
  943. # Select ISA DMA interface
  944. config ISA_DMA_API
  945. bool
  946. config PCI
  947. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE || ARCH_CNS3XXX
  948. help
  949. Find out whether you have a PCI motherboard. PCI is the name of a
  950. bus system, i.e. the way the CPU talks to the other stuff inside
  951. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  952. VESA. If you have PCI, say Y, otherwise N.
  953. config PCI_DOMAINS
  954. bool
  955. depends on PCI
  956. config PCI_SYSCALL
  957. def_bool PCI
  958. # Select the host bridge type
  959. config PCI_HOST_VIA82C505
  960. bool
  961. depends on PCI && ARCH_SHARK
  962. default y
  963. config PCI_HOST_ITE8152
  964. bool
  965. depends on PCI && MACH_ARMCORE
  966. default y
  967. select DMABOUNCE
  968. source "drivers/pci/Kconfig"
  969. source "drivers/pcmcia/Kconfig"
  970. endmenu
  971. menu "Kernel Features"
  972. source "kernel/time/Kconfig"
  973. config SMP
  974. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  975. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  976. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
  977. ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  978. depends on GENERIC_CLOCKEVENTS
  979. select USE_GENERIC_SMP_HELPERS
  980. select HAVE_ARM_SCU if ARCH_REALVIEW || ARCH_OMAP4 || ARCH_S5PV310 ||\
  981. ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4
  982. help
  983. This enables support for systems with more than one CPU. If you have
  984. a system with only one CPU, like most personal computers, say N. If
  985. you have a system with more than one CPU, say Y.
  986. If you say N here, the kernel will run on single and multiprocessor
  987. machines, but will use only one CPU of a multiprocessor machine. If
  988. you say Y here, the kernel will run on many, but not all, single
  989. processor machines. On a single processor machine, the kernel will
  990. run faster if you say N here.
  991. See also <file:Documentation/i386/IO-APIC.txt>,
  992. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  993. <http://www.linuxdoc.org/docs.html#howto>.
  994. If you don't know what to do here, say N.
  995. config HAVE_ARM_SCU
  996. bool
  997. depends on SMP
  998. help
  999. This option enables support for the ARM system coherency unit
  1000. config HAVE_ARM_TWD
  1001. bool
  1002. depends on SMP
  1003. help
  1004. This options enables support for the ARM timer and watchdog unit
  1005. choice
  1006. prompt "Memory split"
  1007. default VMSPLIT_3G
  1008. help
  1009. Select the desired split between kernel and user memory.
  1010. If you are not absolutely sure what you are doing, leave this
  1011. option alone!
  1012. config VMSPLIT_3G
  1013. bool "3G/1G user/kernel split"
  1014. config VMSPLIT_2G
  1015. bool "2G/2G user/kernel split"
  1016. config VMSPLIT_1G
  1017. bool "1G/3G user/kernel split"
  1018. endchoice
  1019. config PAGE_OFFSET
  1020. hex
  1021. default 0x40000000 if VMSPLIT_1G
  1022. default 0x80000000 if VMSPLIT_2G
  1023. default 0xC0000000
  1024. config NR_CPUS
  1025. int "Maximum number of CPUs (2-32)"
  1026. range 2 32
  1027. depends on SMP
  1028. default "4"
  1029. config HOTPLUG_CPU
  1030. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1031. depends on SMP && HOTPLUG && EXPERIMENTAL
  1032. help
  1033. Say Y here to experiment with turning CPUs off and on. CPUs
  1034. can be controlled through /sys/devices/system/cpu.
  1035. config LOCAL_TIMERS
  1036. bool "Use local timer interrupts"
  1037. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  1038. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1039. ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  1040. default y
  1041. select HAVE_ARM_TWD if ARCH_REALVIEW || ARCH_OMAP4 || ARCH_S5PV310 || \
  1042. ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS
  1043. help
  1044. Enable support for local timers on SMP platforms, rather then the
  1045. legacy IPI broadcast method. Local timers allows the system
  1046. accounting to be spread across the timer interval, preventing a
  1047. "thundering herd" at every timer tick.
  1048. source kernel/Kconfig.preempt
  1049. config HZ
  1050. int
  1051. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || \
  1052. ARCH_S5P6442 || ARCH_S5PV210 || ARCH_S5PV310
  1053. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1054. default AT91_TIMER_HZ if ARCH_AT91
  1055. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1056. default 100
  1057. config THUMB2_KERNEL
  1058. bool "Compile the kernel in Thumb-2 mode"
  1059. depends on CPU_V7 && EXPERIMENTAL
  1060. select AEABI
  1061. select ARM_ASM_UNIFIED
  1062. help
  1063. By enabling this option, the kernel will be compiled in
  1064. Thumb-2 mode. A compiler/assembler that understand the unified
  1065. ARM-Thumb syntax is needed.
  1066. If unsure, say N.
  1067. config ARM_ASM_UNIFIED
  1068. bool
  1069. config AEABI
  1070. bool "Use the ARM EABI to compile the kernel"
  1071. help
  1072. This option allows for the kernel to be compiled using the latest
  1073. ARM ABI (aka EABI). This is only useful if you are using a user
  1074. space environment that is also compiled with EABI.
  1075. Since there are major incompatibilities between the legacy ABI and
  1076. EABI, especially with regard to structure member alignment, this
  1077. option also changes the kernel syscall calling convention to
  1078. disambiguate both ABIs and allow for backward compatibility support
  1079. (selected with CONFIG_OABI_COMPAT).
  1080. To use this you need GCC version 4.0.0 or later.
  1081. config OABI_COMPAT
  1082. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1083. depends on AEABI && EXPERIMENTAL
  1084. default y
  1085. help
  1086. This option preserves the old syscall interface along with the
  1087. new (ARM EABI) one. It also provides a compatibility layer to
  1088. intercept syscalls that have structure arguments which layout
  1089. in memory differs between the legacy ABI and the new ARM EABI
  1090. (only for non "thumb" binaries). This option adds a tiny
  1091. overhead to all syscalls and produces a slightly larger kernel.
  1092. If you know you'll be using only pure EABI user space then you
  1093. can say N here. If this option is not selected and you attempt
  1094. to execute a legacy ABI binary then the result will be
  1095. UNPREDICTABLE (in fact it can be predicted that it won't work
  1096. at all). If in doubt say Y.
  1097. config ARCH_HAS_HOLES_MEMORYMODEL
  1098. bool
  1099. config ARCH_SPARSEMEM_ENABLE
  1100. bool
  1101. config ARCH_SPARSEMEM_DEFAULT
  1102. def_bool ARCH_SPARSEMEM_ENABLE
  1103. config ARCH_SELECT_MEMORY_MODEL
  1104. def_bool ARCH_SPARSEMEM_ENABLE
  1105. config HIGHMEM
  1106. bool "High Memory Support (EXPERIMENTAL)"
  1107. depends on MMU && EXPERIMENTAL
  1108. help
  1109. The address space of ARM processors is only 4 Gigabytes large
  1110. and it has to accommodate user address space, kernel address
  1111. space as well as some memory mapped IO. That means that, if you
  1112. have a large amount of physical memory and/or IO, not all of the
  1113. memory can be "permanently mapped" by the kernel. The physical
  1114. memory that is not permanently mapped is called "high memory".
  1115. Depending on the selected kernel/user memory split, minimum
  1116. vmalloc space and actual amount of RAM, you may not need this
  1117. option which should result in a slightly faster kernel.
  1118. If unsure, say n.
  1119. config HIGHPTE
  1120. bool "Allocate 2nd-level pagetables from highmem"
  1121. depends on HIGHMEM
  1122. depends on !OUTER_CACHE
  1123. config HW_PERF_EVENTS
  1124. bool "Enable hardware performance counter support for perf events"
  1125. depends on PERF_EVENTS && CPU_HAS_PMU
  1126. default y
  1127. help
  1128. Enable hardware performance counter support for perf events. If
  1129. disabled, perf events will use software events only.
  1130. config SPARSE_IRQ
  1131. def_bool n
  1132. help
  1133. This enables support for sparse irqs. This is useful in general
  1134. as most CPUs have a fairly sparse array of IRQ vectors, which
  1135. the irq_desc then maps directly on to. Systems with a high
  1136. number of off-chip IRQs will want to treat this as
  1137. experimental until they have been independently verified.
  1138. source "mm/Kconfig"
  1139. config FORCE_MAX_ZONEORDER
  1140. int "Maximum zone order" if ARCH_SHMOBILE
  1141. range 11 64 if ARCH_SHMOBILE
  1142. default "9" if SA1111
  1143. default "11"
  1144. help
  1145. The kernel memory allocator divides physically contiguous memory
  1146. blocks into "zones", where each zone is a power of two number of
  1147. pages. This option selects the largest power of two that the kernel
  1148. keeps in the memory allocator. If you need to allocate very large
  1149. blocks of physically contiguous memory, then you may need to
  1150. increase this value.
  1151. This config option is actually maximum order plus one. For example,
  1152. a value of 11 means that the largest free memory block is 2^10 pages.
  1153. config LEDS
  1154. bool "Timer and CPU usage LEDs"
  1155. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1156. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1157. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1158. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1159. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1160. ARCH_AT91 || ARCH_DAVINCI || \
  1161. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1162. help
  1163. If you say Y here, the LEDs on your machine will be used
  1164. to provide useful information about your current system status.
  1165. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1166. be able to select which LEDs are active using the options below. If
  1167. you are compiling a kernel for the EBSA-110 or the LART however, the
  1168. red LED will simply flash regularly to indicate that the system is
  1169. still functional. It is safe to say Y here if you have a CATS
  1170. system, but the driver will do nothing.
  1171. config LEDS_TIMER
  1172. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1173. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1174. || MACH_OMAP_PERSEUS2
  1175. depends on LEDS
  1176. depends on !GENERIC_CLOCKEVENTS
  1177. default y if ARCH_EBSA110
  1178. help
  1179. If you say Y here, one of the system LEDs (the green one on the
  1180. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1181. will flash regularly to indicate that the system is still
  1182. operational. This is mainly useful to kernel hackers who are
  1183. debugging unstable kernels.
  1184. The LART uses the same LED for both Timer LED and CPU usage LED
  1185. functions. You may choose to use both, but the Timer LED function
  1186. will overrule the CPU usage LED.
  1187. config LEDS_CPU
  1188. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1189. !ARCH_OMAP) \
  1190. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1191. || MACH_OMAP_PERSEUS2
  1192. depends on LEDS
  1193. help
  1194. If you say Y here, the red LED will be used to give a good real
  1195. time indication of CPU usage, by lighting whenever the idle task
  1196. is not currently executing.
  1197. The LART uses the same LED for both Timer LED and CPU usage LED
  1198. functions. You may choose to use both, but the Timer LED function
  1199. will overrule the CPU usage LED.
  1200. config ALIGNMENT_TRAP
  1201. bool
  1202. depends on CPU_CP15_MMU
  1203. default y if !ARCH_EBSA110
  1204. select HAVE_PROC_CPU if PROC_FS
  1205. help
  1206. ARM processors cannot fetch/store information which is not
  1207. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1208. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1209. fetch/store instructions will be emulated in software if you say
  1210. here, which has a severe performance impact. This is necessary for
  1211. correct operation of some network protocols. With an IP-only
  1212. configuration it is safe to say N, otherwise say Y.
  1213. config UACCESS_WITH_MEMCPY
  1214. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1215. depends on MMU && EXPERIMENTAL
  1216. default y if CPU_FEROCEON
  1217. help
  1218. Implement faster copy_to_user and clear_user methods for CPU
  1219. cores where a 8-word STM instruction give significantly higher
  1220. memory write throughput than a sequence of individual 32bit stores.
  1221. A possible side effect is a slight increase in scheduling latency
  1222. between threads sharing the same address space if they invoke
  1223. such copy operations with large buffers.
  1224. However, if the CPU data cache is using a write-allocate mode,
  1225. this option is unlikely to provide any performance gain.
  1226. config CC_STACKPROTECTOR
  1227. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1228. help
  1229. This option turns on the -fstack-protector GCC feature. This
  1230. feature puts, at the beginning of functions, a canary value on
  1231. the stack just before the return address, and validates
  1232. the value just before actually returning. Stack based buffer
  1233. overflows (that need to overwrite this return address) now also
  1234. overwrite the canary, which gets detected and the attack is then
  1235. neutralized via a kernel panic.
  1236. This feature requires gcc version 4.2 or above.
  1237. config DEPRECATED_PARAM_STRUCT
  1238. bool "Provide old way to pass kernel parameters"
  1239. help
  1240. This was deprecated in 2001 and announced to live on for 5 years.
  1241. Some old boot loaders still use this way.
  1242. endmenu
  1243. menu "Boot options"
  1244. # Compressed boot loader in ROM. Yes, we really want to ask about
  1245. # TEXT and BSS so we preserve their values in the config files.
  1246. config ZBOOT_ROM_TEXT
  1247. hex "Compressed ROM boot loader base address"
  1248. default "0"
  1249. help
  1250. The physical address at which the ROM-able zImage is to be
  1251. placed in the target. Platforms which normally make use of
  1252. ROM-able zImage formats normally set this to a suitable
  1253. value in their defconfig file.
  1254. If ZBOOT_ROM is not enabled, this has no effect.
  1255. config ZBOOT_ROM_BSS
  1256. hex "Compressed ROM boot loader BSS address"
  1257. default "0"
  1258. help
  1259. The base address of an area of read/write memory in the target
  1260. for the ROM-able zImage which must be available while the
  1261. decompressor is running. It must be large enough to hold the
  1262. entire decompressed kernel plus an additional 128 KiB.
  1263. Platforms which normally make use of ROM-able zImage formats
  1264. normally set this to a suitable value in their defconfig file.
  1265. If ZBOOT_ROM is not enabled, this has no effect.
  1266. config ZBOOT_ROM
  1267. bool "Compressed boot loader in ROM/flash"
  1268. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1269. help
  1270. Say Y here if you intend to execute your compressed kernel image
  1271. (zImage) directly from ROM or flash. If unsure, say N.
  1272. config CMDLINE
  1273. string "Default kernel command string"
  1274. default ""
  1275. help
  1276. On some architectures (EBSA110 and CATS), there is currently no way
  1277. for the boot loader to pass arguments to the kernel. For these
  1278. architectures, you should supply some command-line options at build
  1279. time by entering them here. As a minimum, you should specify the
  1280. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1281. config CMDLINE_FORCE
  1282. bool "Always use the default kernel command string"
  1283. depends on CMDLINE != ""
  1284. help
  1285. Always use the default kernel command string, even if the boot
  1286. loader passes other arguments to the kernel.
  1287. This is useful if you cannot or don't want to change the
  1288. command-line options your boot loader passes to the kernel.
  1289. If unsure, say N.
  1290. config XIP_KERNEL
  1291. bool "Kernel Execute-In-Place from ROM"
  1292. depends on !ZBOOT_ROM
  1293. help
  1294. Execute-In-Place allows the kernel to run from non-volatile storage
  1295. directly addressable by the CPU, such as NOR flash. This saves RAM
  1296. space since the text section of the kernel is not loaded from flash
  1297. to RAM. Read-write sections, such as the data section and stack,
  1298. are still copied to RAM. The XIP kernel is not compressed since
  1299. it has to run directly from flash, so it will take more space to
  1300. store it. The flash address used to link the kernel object files,
  1301. and for storing it, is configuration dependent. Therefore, if you
  1302. say Y here, you must know the proper physical address where to
  1303. store the kernel image depending on your own flash memory usage.
  1304. Also note that the make target becomes "make xipImage" rather than
  1305. "make zImage" or "make Image". The final kernel binary to put in
  1306. ROM memory will be arch/arm/boot/xipImage.
  1307. If unsure, say N.
  1308. config XIP_PHYS_ADDR
  1309. hex "XIP Kernel Physical Location"
  1310. depends on XIP_KERNEL
  1311. default "0x00080000"
  1312. help
  1313. This is the physical address in your flash memory the kernel will
  1314. be linked for and stored to. This address is dependent on your
  1315. own flash usage.
  1316. config KEXEC
  1317. bool "Kexec system call (EXPERIMENTAL)"
  1318. depends on EXPERIMENTAL
  1319. help
  1320. kexec is a system call that implements the ability to shutdown your
  1321. current kernel, and to start another kernel. It is like a reboot
  1322. but it is independent of the system firmware. And like a reboot
  1323. you can start any kernel with it, not just Linux.
  1324. It is an ongoing process to be certain the hardware in a machine
  1325. is properly shutdown, so do not be surprised if this code does not
  1326. initially work for you. It may help to enable device hotplugging
  1327. support.
  1328. config ATAGS_PROC
  1329. bool "Export atags in procfs"
  1330. depends on KEXEC
  1331. default y
  1332. help
  1333. Should the atags used to boot the kernel be exported in an "atags"
  1334. file in procfs. Useful with kexec.
  1335. config AUTO_ZRELADDR
  1336. bool "Auto calculation of the decompressed kernel image address"
  1337. depends on !ZBOOT_ROM && !ARCH_U300
  1338. help
  1339. ZRELADDR is the physical address where the decompressed kernel
  1340. image will be placed. If AUTO_ZRELADDR is selected, the address
  1341. will be determined at run-time by masking the current IP with
  1342. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1343. from start of memory.
  1344. endmenu
  1345. menu "CPU Power Management"
  1346. if ARCH_HAS_CPUFREQ
  1347. source "drivers/cpufreq/Kconfig"
  1348. config CPU_FREQ_SA1100
  1349. bool
  1350. config CPU_FREQ_SA1110
  1351. bool
  1352. config CPU_FREQ_INTEGRATOR
  1353. tristate "CPUfreq driver for ARM Integrator CPUs"
  1354. depends on ARCH_INTEGRATOR && CPU_FREQ
  1355. default y
  1356. help
  1357. This enables the CPUfreq driver for ARM Integrator CPUs.
  1358. For details, take a look at <file:Documentation/cpu-freq>.
  1359. If in doubt, say Y.
  1360. config CPU_FREQ_PXA
  1361. bool
  1362. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1363. default y
  1364. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1365. config CPU_FREQ_S3C64XX
  1366. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1367. depends on CPU_FREQ && CPU_S3C6410
  1368. config CPU_FREQ_S3C
  1369. bool
  1370. help
  1371. Internal configuration node for common cpufreq on Samsung SoC
  1372. config CPU_FREQ_S3C24XX
  1373. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1374. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1375. select CPU_FREQ_S3C
  1376. help
  1377. This enables the CPUfreq driver for the Samsung S3C24XX family
  1378. of CPUs.
  1379. For details, take a look at <file:Documentation/cpu-freq>.
  1380. If in doubt, say N.
  1381. config CPU_FREQ_S3C24XX_PLL
  1382. bool "Support CPUfreq changing of PLL frequency"
  1383. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1384. help
  1385. Compile in support for changing the PLL frequency from the
  1386. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1387. after a frequency change, so by default it is not enabled.
  1388. This also means that the PLL tables for the selected CPU(s) will
  1389. be built which may increase the size of the kernel image.
  1390. config CPU_FREQ_S3C24XX_DEBUG
  1391. bool "Debug CPUfreq Samsung driver core"
  1392. depends on CPU_FREQ_S3C24XX
  1393. help
  1394. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1395. config CPU_FREQ_S3C24XX_IODEBUG
  1396. bool "Debug CPUfreq Samsung driver IO timing"
  1397. depends on CPU_FREQ_S3C24XX
  1398. help
  1399. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1400. config CPU_FREQ_S3C24XX_DEBUGFS
  1401. bool "Export debugfs for CPUFreq"
  1402. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1403. help
  1404. Export status information via debugfs.
  1405. endif
  1406. source "drivers/cpuidle/Kconfig"
  1407. endmenu
  1408. menu "Floating point emulation"
  1409. comment "At least one emulation must be selected"
  1410. config FPE_NWFPE
  1411. bool "NWFPE math emulation"
  1412. depends on !AEABI || OABI_COMPAT
  1413. ---help---
  1414. Say Y to include the NWFPE floating point emulator in the kernel.
  1415. This is necessary to run most binaries. Linux does not currently
  1416. support floating point hardware so you need to say Y here even if
  1417. your machine has an FPA or floating point co-processor podule.
  1418. You may say N here if you are going to load the Acorn FPEmulator
  1419. early in the bootup.
  1420. config FPE_NWFPE_XP
  1421. bool "Support extended precision"
  1422. depends on FPE_NWFPE
  1423. help
  1424. Say Y to include 80-bit support in the kernel floating-point
  1425. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1426. Note that gcc does not generate 80-bit operations by default,
  1427. so in most cases this option only enlarges the size of the
  1428. floating point emulator without any good reason.
  1429. You almost surely want to say N here.
  1430. config FPE_FASTFPE
  1431. bool "FastFPE math emulation (EXPERIMENTAL)"
  1432. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1433. ---help---
  1434. Say Y here to include the FAST floating point emulator in the kernel.
  1435. This is an experimental much faster emulator which now also has full
  1436. precision for the mantissa. It does not support any exceptions.
  1437. It is very simple, and approximately 3-6 times faster than NWFPE.
  1438. It should be sufficient for most programs. It may be not suitable
  1439. for scientific calculations, but you have to check this for yourself.
  1440. If you do not feel you need a faster FP emulation you should better
  1441. choose NWFPE.
  1442. config VFP
  1443. bool "VFP-format floating point maths"
  1444. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1445. help
  1446. Say Y to include VFP support code in the kernel. This is needed
  1447. if your hardware includes a VFP unit.
  1448. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1449. release notes and additional status information.
  1450. Say N if your target does not have VFP hardware.
  1451. config VFPv3
  1452. bool
  1453. depends on VFP
  1454. default y if CPU_V7
  1455. config NEON
  1456. bool "Advanced SIMD (NEON) Extension support"
  1457. depends on VFPv3 && CPU_V7
  1458. help
  1459. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1460. Extension.
  1461. endmenu
  1462. menu "Userspace binary formats"
  1463. source "fs/Kconfig.binfmt"
  1464. config ARTHUR
  1465. tristate "RISC OS personality"
  1466. depends on !AEABI
  1467. help
  1468. Say Y here to include the kernel code necessary if you want to run
  1469. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1470. experimental; if this sounds frightening, say N and sleep in peace.
  1471. You can also say M here to compile this support as a module (which
  1472. will be called arthur).
  1473. endmenu
  1474. menu "Power management options"
  1475. source "kernel/power/Kconfig"
  1476. config ARCH_SUSPEND_POSSIBLE
  1477. def_bool y
  1478. endmenu
  1479. source "net/Kconfig"
  1480. source "drivers/Kconfig"
  1481. source "fs/Kconfig"
  1482. source "arch/arm/Kconfig.debug"
  1483. source "security/Kconfig"
  1484. source "crypto/Kconfig"
  1485. source "lib/Kconfig"