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_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  21. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  22. select HAVE_GENERIC_DMA_COHERENT
  23. select HAVE_KERNEL_GZIP
  24. select HAVE_KERNEL_LZO
  25. select HAVE_KERNEL_LZMA
  26. select HAVE_PERF_EVENTS
  27. select PERF_USE_VMALLOC
  28. select HAVE_REGS_AND_STACK_ACCESS_API
  29. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V7))
  30. help
  31. The ARM series is a line of low-power-consumption RISC chip designs
  32. licensed by ARM Ltd and targeted at embedded applications and
  33. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  34. manufactured, but legacy ARM-based PC hardware remains popular in
  35. Europe. There is an ARM Linux project with a web page at
  36. <http://www.arm.linux.org.uk/>.
  37. config HAVE_PWM
  38. bool
  39. config SYS_SUPPORTS_APM_EMULATION
  40. bool
  41. config GENERIC_GPIO
  42. bool
  43. config ARCH_USES_GETTIMEOFFSET
  44. bool
  45. default n
  46. config GENERIC_CLOCKEVENTS
  47. bool
  48. config GENERIC_CLOCKEVENTS_BROADCAST
  49. bool
  50. depends on GENERIC_CLOCKEVENTS
  51. default y if SMP
  52. config HAVE_TCM
  53. bool
  54. select GENERIC_ALLOCATOR
  55. config HAVE_PROC_CPU
  56. bool
  57. config NO_IOPORT
  58. bool
  59. config EISA
  60. bool
  61. ---help---
  62. The Extended Industry Standard Architecture (EISA) bus was
  63. developed as an open alternative to the IBM MicroChannel bus.
  64. The EISA bus provided some of the features of the IBM MicroChannel
  65. bus while maintaining backward compatibility with cards made for
  66. the older ISA bus. The EISA bus saw limited use between 1988 and
  67. 1995 when it was made obsolete by the PCI bus.
  68. Say Y here if you are building a kernel for an EISA-based machine.
  69. Otherwise, say N.
  70. config SBUS
  71. bool
  72. config MCA
  73. bool
  74. help
  75. MicroChannel Architecture is found in some IBM PS/2 machines and
  76. laptops. It is a bus system similar to PCI or ISA. See
  77. <file:Documentation/mca.txt> (and especially the web page given
  78. there) before attempting to build an MCA bus kernel.
  79. config GENERIC_HARDIRQS
  80. bool
  81. default y
  82. config STACKTRACE_SUPPORT
  83. bool
  84. default y
  85. config HAVE_LATENCYTOP_SUPPORT
  86. bool
  87. depends on !SMP
  88. default y
  89. config LOCKDEP_SUPPORT
  90. bool
  91. default y
  92. config TRACE_IRQFLAGS_SUPPORT
  93. bool
  94. default y
  95. config HARDIRQS_SW_RESEND
  96. bool
  97. default y
  98. config GENERIC_IRQ_PROBE
  99. bool
  100. default y
  101. config GENERIC_LOCKBREAK
  102. bool
  103. default y
  104. depends on SMP && PREEMPT
  105. config RWSEM_GENERIC_SPINLOCK
  106. bool
  107. default y
  108. config RWSEM_XCHGADD_ALGORITHM
  109. bool
  110. config ARCH_HAS_ILOG2_U32
  111. bool
  112. config ARCH_HAS_ILOG2_U64
  113. bool
  114. config ARCH_HAS_CPUFREQ
  115. bool
  116. help
  117. Internal node to signify that the ARCH has CPUFREQ support
  118. and that the relevant menu configurations are displayed for
  119. it.
  120. config ARCH_HAS_CPU_IDLE_WAIT
  121. def_bool y
  122. config GENERIC_HWEIGHT
  123. bool
  124. default y
  125. config GENERIC_CALIBRATE_DELAY
  126. bool
  127. default y
  128. config ARCH_MAY_HAVE_PC_FDC
  129. bool
  130. config ZONE_DMA
  131. bool
  132. config NEED_DMA_MAP_STATE
  133. def_bool y
  134. config GENERIC_ISA_DMA
  135. bool
  136. config FIQ
  137. bool
  138. config ARCH_MTD_XIP
  139. bool
  140. config GENERIC_HARDIRQS_NO__DO_IRQ
  141. def_bool y
  142. config ARM_L1_CACHE_SHIFT_6
  143. bool
  144. help
  145. Setting ARM L1 cache line size to 64 Bytes.
  146. config VECTORS_BASE
  147. hex
  148. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  149. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  150. default 0x00000000
  151. help
  152. The base address of exception vectors.
  153. source "init/Kconfig"
  154. source "kernel/Kconfig.freezer"
  155. menu "System Type"
  156. config MMU
  157. bool "MMU-based Paged Memory Management Support"
  158. default y
  159. help
  160. Select if you want MMU-based virtualised addressing space
  161. support by paged memory management. If unsure, say 'Y'.
  162. #
  163. # The "ARM system type" choice list is ordered alphabetically by option
  164. # text. Please add new entries in the option alphabetic order.
  165. #
  166. choice
  167. prompt "ARM system type"
  168. default ARCH_VERSATILE
  169. config ARCH_AAEC2000
  170. bool "Agilent AAEC-2000 based"
  171. select CPU_ARM920T
  172. select ARM_AMBA
  173. select HAVE_CLK
  174. select ARCH_USES_GETTIMEOFFSET
  175. help
  176. This enables support for systems based on the Agilent AAEC-2000
  177. config ARCH_INTEGRATOR
  178. bool "ARM Ltd. Integrator family"
  179. select ARM_AMBA
  180. select ARCH_HAS_CPUFREQ
  181. select COMMON_CLKDEV
  182. select ICST
  183. select GENERIC_CLOCKEVENTS
  184. select PLAT_VERSATILE
  185. help
  186. Support for ARM's Integrator platform.
  187. config ARCH_REALVIEW
  188. bool "ARM Ltd. RealView family"
  189. select ARM_AMBA
  190. select COMMON_CLKDEV
  191. select ICST
  192. select GENERIC_CLOCKEVENTS
  193. select ARCH_WANT_OPTIONAL_GPIOLIB
  194. select PLAT_VERSATILE
  195. select ARM_TIMER_SP804
  196. select GPIO_PL061 if GPIOLIB
  197. help
  198. This enables support for ARM Ltd RealView boards.
  199. config ARCH_VERSATILE
  200. bool "ARM Ltd. Versatile family"
  201. select ARM_AMBA
  202. select ARM_VIC
  203. select COMMON_CLKDEV
  204. select ICST
  205. select GENERIC_CLOCKEVENTS
  206. select ARCH_WANT_OPTIONAL_GPIOLIB
  207. select PLAT_VERSATILE
  208. select ARM_TIMER_SP804
  209. help
  210. This enables support for ARM Ltd Versatile board.
  211. config ARCH_VEXPRESS
  212. bool "ARM Ltd. Versatile Express family"
  213. select ARCH_WANT_OPTIONAL_GPIOLIB
  214. select ARM_AMBA
  215. select ARM_TIMER_SP804
  216. select COMMON_CLKDEV
  217. select GENERIC_CLOCKEVENTS
  218. select HAVE_CLK
  219. select ICST
  220. select PLAT_VERSATILE
  221. help
  222. This enables support for the ARM Ltd Versatile Express boards.
  223. config ARCH_AT91
  224. bool "Atmel AT91"
  225. select ARCH_REQUIRE_GPIOLIB
  226. select HAVE_CLK
  227. help
  228. This enables support for systems based on the Atmel AT91RM9200,
  229. AT91SAM9 and AT91CAP9 processors.
  230. config ARCH_BCMRING
  231. bool "Broadcom BCMRING"
  232. depends on MMU
  233. select CPU_V6
  234. select ARM_AMBA
  235. select COMMON_CLKDEV
  236. select GENERIC_CLOCKEVENTS
  237. select ARCH_WANT_OPTIONAL_GPIOLIB
  238. help
  239. Support for Broadcom's BCMRing platform.
  240. config ARCH_CLPS711X
  241. bool "Cirrus Logic CLPS711x/EP721x-based"
  242. select CPU_ARM720T
  243. select ARCH_USES_GETTIMEOFFSET
  244. help
  245. Support for Cirrus Logic 711x/721x based boards.
  246. config ARCH_CNS3XXX
  247. bool "Cavium Networks CNS3XXX family"
  248. select CPU_V6
  249. select GENERIC_CLOCKEVENTS
  250. select ARM_GIC
  251. select PCI_DOMAINS if PCI
  252. help
  253. Support for Cavium Networks CNS3XXX platform.
  254. config ARCH_GEMINI
  255. bool "Cortina Systems Gemini"
  256. select CPU_FA526
  257. select ARCH_REQUIRE_GPIOLIB
  258. select ARCH_USES_GETTIMEOFFSET
  259. help
  260. Support for the Cortina Systems Gemini family SoCs
  261. config ARCH_EBSA110
  262. bool "EBSA-110"
  263. select CPU_SA110
  264. select ISA
  265. select NO_IOPORT
  266. select ARCH_USES_GETTIMEOFFSET
  267. help
  268. This is an evaluation board for the StrongARM processor available
  269. from Digital. It has limited hardware on-board, including an
  270. Ethernet interface, two PCMCIA sockets, two serial ports and a
  271. parallel port.
  272. config ARCH_EP93XX
  273. bool "EP93xx-based"
  274. select CPU_ARM920T
  275. select ARM_AMBA
  276. select ARM_VIC
  277. select COMMON_CLKDEV
  278. select ARCH_REQUIRE_GPIOLIB
  279. select ARCH_HAS_HOLES_MEMORYMODEL
  280. select ARCH_USES_GETTIMEOFFSET
  281. help
  282. This enables support for the Cirrus EP93xx series of CPUs.
  283. config ARCH_FOOTBRIDGE
  284. bool "FootBridge"
  285. select CPU_SA110
  286. select FOOTBRIDGE
  287. select ARCH_USES_GETTIMEOFFSET
  288. help
  289. Support for systems based on the DC21285 companion chip
  290. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  291. config ARCH_MXC
  292. bool "Freescale MXC/iMX-based"
  293. select GENERIC_CLOCKEVENTS
  294. select ARCH_REQUIRE_GPIOLIB
  295. select COMMON_CLKDEV
  296. help
  297. Support for Freescale MXC/iMX-based family of processors
  298. config ARCH_STMP3XXX
  299. bool "Freescale STMP3xxx"
  300. select CPU_ARM926T
  301. select COMMON_CLKDEV
  302. select ARCH_REQUIRE_GPIOLIB
  303. select GENERIC_CLOCKEVENTS
  304. select USB_ARCH_HAS_EHCI
  305. help
  306. Support for systems based on the Freescale 3xxx CPUs.
  307. config ARCH_NETX
  308. bool "Hilscher NetX based"
  309. select CPU_ARM926T
  310. select ARM_VIC
  311. select GENERIC_CLOCKEVENTS
  312. help
  313. This enables support for systems based on the Hilscher NetX Soc
  314. config ARCH_H720X
  315. bool "Hynix HMS720x-based"
  316. select CPU_ARM720T
  317. select ISA_DMA_API
  318. select ARCH_USES_GETTIMEOFFSET
  319. help
  320. This enables support for systems based on the Hynix HMS720x
  321. config ARCH_IOP13XX
  322. bool "IOP13xx-based"
  323. depends on MMU
  324. select CPU_XSC3
  325. select PLAT_IOP
  326. select PCI
  327. select ARCH_SUPPORTS_MSI
  328. select VMSPLIT_1G
  329. help
  330. Support for Intel's IOP13XX (XScale) family of processors.
  331. config ARCH_IOP32X
  332. bool "IOP32x-based"
  333. depends on MMU
  334. select CPU_XSCALE
  335. select PLAT_IOP
  336. select PCI
  337. select ARCH_REQUIRE_GPIOLIB
  338. help
  339. Support for Intel's 80219 and IOP32X (XScale) family of
  340. processors.
  341. config ARCH_IOP33X
  342. bool "IOP33x-based"
  343. depends on MMU
  344. select CPU_XSCALE
  345. select PLAT_IOP
  346. select PCI
  347. select ARCH_REQUIRE_GPIOLIB
  348. help
  349. Support for Intel's IOP33X (XScale) family of processors.
  350. config ARCH_IXP23XX
  351. bool "IXP23XX-based"
  352. depends on MMU
  353. select CPU_XSC3
  354. select PCI
  355. select ARCH_USES_GETTIMEOFFSET
  356. help
  357. Support for Intel's IXP23xx (XScale) family of processors.
  358. config ARCH_IXP2000
  359. bool "IXP2400/2800-based"
  360. depends on MMU
  361. select CPU_XSCALE
  362. select PCI
  363. select ARCH_USES_GETTIMEOFFSET
  364. help
  365. Support for Intel's IXP2400/2800 (XScale) family of processors.
  366. config ARCH_IXP4XX
  367. bool "IXP4xx-based"
  368. depends on MMU
  369. select CPU_XSCALE
  370. select GENERIC_GPIO
  371. select GENERIC_CLOCKEVENTS
  372. select DMABOUNCE if PCI
  373. help
  374. Support for Intel's IXP4XX (XScale) family of processors.
  375. config ARCH_DOVE
  376. bool "Marvell Dove"
  377. select PCI
  378. select ARCH_REQUIRE_GPIOLIB
  379. select GENERIC_CLOCKEVENTS
  380. select PLAT_ORION
  381. help
  382. Support for the Marvell Dove SoC 88AP510
  383. config ARCH_KIRKWOOD
  384. bool "Marvell Kirkwood"
  385. select CPU_FEROCEON
  386. select PCI
  387. select ARCH_REQUIRE_GPIOLIB
  388. select GENERIC_CLOCKEVENTS
  389. select PLAT_ORION
  390. help
  391. Support for the following Marvell Kirkwood series SoCs:
  392. 88F6180, 88F6192 and 88F6281.
  393. config ARCH_LOKI
  394. bool "Marvell Loki (88RC8480)"
  395. select CPU_FEROCEON
  396. select GENERIC_CLOCKEVENTS
  397. select PLAT_ORION
  398. help
  399. Support for the Marvell Loki (88RC8480) SoC.
  400. config ARCH_LPC32XX
  401. bool "NXP LPC32XX"
  402. select CPU_ARM926T
  403. select ARCH_REQUIRE_GPIOLIB
  404. select HAVE_IDE
  405. select ARM_AMBA
  406. select USB_ARCH_HAS_OHCI
  407. select COMMON_CLKDEV
  408. select GENERIC_TIME
  409. select GENERIC_CLOCKEVENTS
  410. help
  411. Support for the NXP LPC32XX family of processors
  412. config ARCH_MV78XX0
  413. bool "Marvell MV78xx0"
  414. select CPU_FEROCEON
  415. select PCI
  416. select ARCH_REQUIRE_GPIOLIB
  417. select GENERIC_CLOCKEVENTS
  418. select PLAT_ORION
  419. help
  420. Support for the following Marvell MV78xx0 series SoCs:
  421. MV781x0, MV782x0.
  422. config ARCH_ORION5X
  423. bool "Marvell Orion"
  424. depends on MMU
  425. select CPU_FEROCEON
  426. select PCI
  427. select ARCH_REQUIRE_GPIOLIB
  428. select GENERIC_CLOCKEVENTS
  429. select PLAT_ORION
  430. help
  431. Support for the following Marvell Orion 5x series SoCs:
  432. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  433. Orion-2 (5281), Orion-1-90 (6183).
  434. config ARCH_MMP
  435. bool "Marvell PXA168/910/MMP2"
  436. depends on MMU
  437. select ARCH_REQUIRE_GPIOLIB
  438. select COMMON_CLKDEV
  439. select GENERIC_CLOCKEVENTS
  440. select TICK_ONESHOT
  441. select PLAT_PXA
  442. help
  443. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  444. config ARCH_KS8695
  445. bool "Micrel/Kendin KS8695"
  446. select CPU_ARM922T
  447. select ARCH_REQUIRE_GPIOLIB
  448. select ARCH_USES_GETTIMEOFFSET
  449. help
  450. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  451. System-on-Chip devices.
  452. config ARCH_NS9XXX
  453. bool "NetSilicon NS9xxx"
  454. select CPU_ARM926T
  455. select GENERIC_GPIO
  456. select GENERIC_CLOCKEVENTS
  457. select HAVE_CLK
  458. help
  459. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  460. System.
  461. <http://www.digi.com/products/microprocessors/index.jsp>
  462. config ARCH_W90X900
  463. bool "Nuvoton W90X900 CPU"
  464. select CPU_ARM926T
  465. select ARCH_REQUIRE_GPIOLIB
  466. select COMMON_CLKDEV
  467. select GENERIC_CLOCKEVENTS
  468. help
  469. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  470. At present, the w90x900 has been renamed nuc900, regarding
  471. the ARM series product line, you can login the following
  472. link address to know more.
  473. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  474. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  475. config ARCH_NUC93X
  476. bool "Nuvoton NUC93X CPU"
  477. select CPU_ARM926T
  478. select COMMON_CLKDEV
  479. help
  480. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  481. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  482. config ARCH_TEGRA
  483. bool "NVIDIA Tegra"
  484. select GENERIC_TIME
  485. select GENERIC_CLOCKEVENTS
  486. select GENERIC_GPIO
  487. select HAVE_CLK
  488. select COMMON_CLKDEV
  489. select ARCH_HAS_BARRIERS if CACHE_L2X0
  490. help
  491. This enables support for NVIDIA Tegra based systems (Tegra APX,
  492. Tegra 6xx and Tegra 2 series).
  493. config ARCH_PNX4008
  494. bool "Philips Nexperia PNX4008 Mobile"
  495. select CPU_ARM926T
  496. select COMMON_CLKDEV
  497. select ARCH_USES_GETTIMEOFFSET
  498. help
  499. This enables support for Philips PNX4008 mobile platform.
  500. config ARCH_PXA
  501. bool "PXA2xx/PXA3xx-based"
  502. depends on MMU
  503. select ARCH_MTD_XIP
  504. select ARCH_HAS_CPUFREQ
  505. select COMMON_CLKDEV
  506. select ARCH_REQUIRE_GPIOLIB
  507. select GENERIC_CLOCKEVENTS
  508. select TICK_ONESHOT
  509. select PLAT_PXA
  510. help
  511. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  512. config ARCH_MSM
  513. bool "Qualcomm MSM"
  514. select HAVE_CLK
  515. select GENERIC_CLOCKEVENTS
  516. select ARCH_REQUIRE_GPIOLIB
  517. help
  518. Support for Qualcomm MSM/QSD based systems. This runs on the
  519. apps processor of the MSM/QSD and depends on a shared memory
  520. interface to the modem processor which runs the baseband
  521. stack and controls some vital subsystems
  522. (clock and power control, etc).
  523. config ARCH_SHMOBILE
  524. bool "Renesas SH-Mobile"
  525. help
  526. Support for Renesas's SH-Mobile ARM platforms
  527. config ARCH_RPC
  528. bool "RiscPC"
  529. select ARCH_ACORN
  530. select FIQ
  531. select TIMER_ACORN
  532. select ARCH_MAY_HAVE_PC_FDC
  533. select HAVE_PATA_PLATFORM
  534. select ISA_DMA_API
  535. select NO_IOPORT
  536. select ARCH_SPARSEMEM_ENABLE
  537. select ARCH_USES_GETTIMEOFFSET
  538. help
  539. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  540. CD-ROM interface, serial and parallel port, and the floppy drive.
  541. config ARCH_SA1100
  542. bool "SA1100-based"
  543. select CPU_SA1100
  544. select ISA
  545. select ARCH_SPARSEMEM_ENABLE
  546. select ARCH_MTD_XIP
  547. select ARCH_HAS_CPUFREQ
  548. select CPU_FREQ
  549. select GENERIC_CLOCKEVENTS
  550. select HAVE_CLK
  551. select TICK_ONESHOT
  552. select ARCH_REQUIRE_GPIOLIB
  553. help
  554. Support for StrongARM 11x0 based boards.
  555. config ARCH_S3C2410
  556. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  557. select GENERIC_GPIO
  558. select ARCH_HAS_CPUFREQ
  559. select HAVE_CLK
  560. select ARCH_USES_GETTIMEOFFSET
  561. select HAVE_S3C2410_I2C
  562. help
  563. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  564. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  565. the Samsung SMDK2410 development board (and derivatives).
  566. Note, the S3C2416 and the S3C2450 are so close that they even share
  567. the same SoC ID code. This means that there is no seperate machine
  568. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  569. config ARCH_S3C64XX
  570. bool "Samsung S3C64XX"
  571. select PLAT_SAMSUNG
  572. select CPU_V6
  573. select ARM_VIC
  574. select HAVE_CLK
  575. select NO_IOPORT
  576. select ARCH_USES_GETTIMEOFFSET
  577. select ARCH_HAS_CPUFREQ
  578. select ARCH_REQUIRE_GPIOLIB
  579. select SAMSUNG_CLKSRC
  580. select SAMSUNG_IRQ_VIC_TIMER
  581. select SAMSUNG_IRQ_UART
  582. select S3C_GPIO_TRACK
  583. select S3C_GPIO_PULL_UPDOWN
  584. select S3C_GPIO_CFG_S3C24XX
  585. select S3C_GPIO_CFG_S3C64XX
  586. select S3C_DEV_NAND
  587. select USB_ARCH_HAS_OHCI
  588. select SAMSUNG_GPIOLIB_4BIT
  589. select HAVE_S3C2410_I2C
  590. select HAVE_S3C2410_WATCHDOG
  591. help
  592. Samsung S3C64XX series based systems
  593. config ARCH_S5P6440
  594. bool "Samsung S5P6440"
  595. select CPU_V6
  596. select GENERIC_GPIO
  597. select HAVE_CLK
  598. select HAVE_S3C2410_WATCHDOG
  599. select ARCH_USES_GETTIMEOFFSET
  600. select HAVE_S3C2410_I2C
  601. select HAVE_S3C_RTC
  602. help
  603. Samsung S5P6440 CPU based systems
  604. config ARCH_S5P6442
  605. bool "Samsung S5P6442"
  606. select CPU_V6
  607. select GENERIC_GPIO
  608. select HAVE_CLK
  609. select ARCH_USES_GETTIMEOFFSET
  610. select HAVE_S3C2410_WATCHDOG
  611. help
  612. Samsung S5P6442 CPU based systems
  613. config ARCH_S5PC100
  614. bool "Samsung S5PC100"
  615. select GENERIC_GPIO
  616. select HAVE_CLK
  617. select CPU_V7
  618. select ARM_L1_CACHE_SHIFT_6
  619. select ARCH_USES_GETTIMEOFFSET
  620. select HAVE_S3C2410_I2C
  621. select HAVE_S3C_RTC
  622. select HAVE_S3C2410_WATCHDOG
  623. help
  624. Samsung S5PC100 series based systems
  625. config ARCH_S5PV210
  626. bool "Samsung S5PV210/S5PC110"
  627. select CPU_V7
  628. select GENERIC_GPIO
  629. select HAVE_CLK
  630. select ARM_L1_CACHE_SHIFT_6
  631. select ARCH_USES_GETTIMEOFFSET
  632. select HAVE_S3C2410_I2C
  633. select HAVE_S3C_RTC
  634. select HAVE_S3C2410_WATCHDOG
  635. help
  636. Samsung S5PV210/S5PC110 series based systems
  637. config ARCH_S5PV310
  638. bool "Samsung S5PV310/S5PC210"
  639. select CPU_V7
  640. select GENERIC_GPIO
  641. select HAVE_CLK
  642. select GENERIC_CLOCKEVENTS
  643. help
  644. Samsung S5PV310 series based systems
  645. config ARCH_SHARK
  646. bool "Shark"
  647. select CPU_SA110
  648. select ISA
  649. select ISA_DMA
  650. select ZONE_DMA
  651. select PCI
  652. select ARCH_USES_GETTIMEOFFSET
  653. help
  654. Support for the StrongARM based Digital DNARD machine, also known
  655. as "Shark" (<http://www.shark-linux.de/shark.html>).
  656. config ARCH_LH7A40X
  657. bool "Sharp LH7A40X"
  658. select CPU_ARM922T
  659. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  660. select ARCH_USES_GETTIMEOFFSET
  661. help
  662. Say Y here for systems based on one of the Sharp LH7A40X
  663. System on a Chip processors. These CPUs include an ARM922T
  664. core with a wide array of integrated devices for
  665. hand-held and low-power applications.
  666. config ARCH_U300
  667. bool "ST-Ericsson U300 Series"
  668. depends on MMU
  669. select CPU_ARM926T
  670. select HAVE_TCM
  671. select ARM_AMBA
  672. select ARM_VIC
  673. select GENERIC_CLOCKEVENTS
  674. select COMMON_CLKDEV
  675. select GENERIC_GPIO
  676. help
  677. Support for ST-Ericsson U300 series mobile platforms.
  678. config ARCH_U8500
  679. bool "ST-Ericsson U8500 Series"
  680. select CPU_V7
  681. select ARM_AMBA
  682. select GENERIC_CLOCKEVENTS
  683. select COMMON_CLKDEV
  684. select ARCH_REQUIRE_GPIOLIB
  685. help
  686. Support for ST-Ericsson's Ux500 architecture
  687. config ARCH_NOMADIK
  688. bool "STMicroelectronics Nomadik"
  689. select ARM_AMBA
  690. select ARM_VIC
  691. select CPU_ARM926T
  692. select COMMON_CLKDEV
  693. select GENERIC_CLOCKEVENTS
  694. select ARCH_REQUIRE_GPIOLIB
  695. help
  696. Support for the Nomadik platform by ST-Ericsson
  697. config ARCH_DAVINCI
  698. bool "TI DaVinci"
  699. select GENERIC_CLOCKEVENTS
  700. select ARCH_REQUIRE_GPIOLIB
  701. select ZONE_DMA
  702. select HAVE_IDE
  703. select COMMON_CLKDEV
  704. select GENERIC_ALLOCATOR
  705. select ARCH_HAS_HOLES_MEMORYMODEL
  706. help
  707. Support for TI's DaVinci platform.
  708. config ARCH_OMAP
  709. bool "TI OMAP"
  710. select HAVE_CLK
  711. select ARCH_REQUIRE_GPIOLIB
  712. select ARCH_HAS_CPUFREQ
  713. select GENERIC_CLOCKEVENTS
  714. select ARCH_HAS_HOLES_MEMORYMODEL
  715. help
  716. Support for TI's OMAP platform (OMAP1 and OMAP2).
  717. config PLAT_SPEAR
  718. bool "ST SPEAr"
  719. select ARM_AMBA
  720. select ARCH_REQUIRE_GPIOLIB
  721. select COMMON_CLKDEV
  722. select GENERIC_CLOCKEVENTS
  723. select HAVE_CLK
  724. help
  725. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  726. endchoice
  727. #
  728. # This is sorted alphabetically by mach-* pathname. However, plat-*
  729. # Kconfigs may be included either alphabetically (according to the
  730. # plat- suffix) or along side the corresponding mach-* source.
  731. #
  732. source "arch/arm/mach-aaec2000/Kconfig"
  733. source "arch/arm/mach-at91/Kconfig"
  734. source "arch/arm/mach-bcmring/Kconfig"
  735. source "arch/arm/mach-clps711x/Kconfig"
  736. source "arch/arm/mach-cns3xxx/Kconfig"
  737. source "arch/arm/mach-davinci/Kconfig"
  738. source "arch/arm/mach-dove/Kconfig"
  739. source "arch/arm/mach-ep93xx/Kconfig"
  740. source "arch/arm/mach-footbridge/Kconfig"
  741. source "arch/arm/mach-gemini/Kconfig"
  742. source "arch/arm/mach-h720x/Kconfig"
  743. source "arch/arm/mach-integrator/Kconfig"
  744. source "arch/arm/mach-iop32x/Kconfig"
  745. source "arch/arm/mach-iop33x/Kconfig"
  746. source "arch/arm/mach-iop13xx/Kconfig"
  747. source "arch/arm/mach-ixp4xx/Kconfig"
  748. source "arch/arm/mach-ixp2000/Kconfig"
  749. source "arch/arm/mach-ixp23xx/Kconfig"
  750. source "arch/arm/mach-kirkwood/Kconfig"
  751. source "arch/arm/mach-ks8695/Kconfig"
  752. source "arch/arm/mach-lh7a40x/Kconfig"
  753. source "arch/arm/mach-loki/Kconfig"
  754. source "arch/arm/mach-lpc32xx/Kconfig"
  755. source "arch/arm/mach-msm/Kconfig"
  756. source "arch/arm/mach-mv78xx0/Kconfig"
  757. source "arch/arm/plat-mxc/Kconfig"
  758. source "arch/arm/mach-netx/Kconfig"
  759. source "arch/arm/mach-nomadik/Kconfig"
  760. source "arch/arm/plat-nomadik/Kconfig"
  761. source "arch/arm/mach-ns9xxx/Kconfig"
  762. source "arch/arm/mach-nuc93x/Kconfig"
  763. source "arch/arm/plat-omap/Kconfig"
  764. source "arch/arm/mach-omap1/Kconfig"
  765. source "arch/arm/mach-omap2/Kconfig"
  766. source "arch/arm/mach-orion5x/Kconfig"
  767. source "arch/arm/mach-pxa/Kconfig"
  768. source "arch/arm/plat-pxa/Kconfig"
  769. source "arch/arm/mach-mmp/Kconfig"
  770. source "arch/arm/mach-realview/Kconfig"
  771. source "arch/arm/mach-sa1100/Kconfig"
  772. source "arch/arm/plat-samsung/Kconfig"
  773. source "arch/arm/plat-s3c24xx/Kconfig"
  774. source "arch/arm/plat-s5p/Kconfig"
  775. source "arch/arm/plat-spear/Kconfig"
  776. if ARCH_S3C2410
  777. source "arch/arm/mach-s3c2400/Kconfig"
  778. source "arch/arm/mach-s3c2410/Kconfig"
  779. source "arch/arm/mach-s3c2412/Kconfig"
  780. source "arch/arm/mach-s3c2416/Kconfig"
  781. source "arch/arm/mach-s3c2440/Kconfig"
  782. source "arch/arm/mach-s3c2443/Kconfig"
  783. endif
  784. if ARCH_S3C64XX
  785. source "arch/arm/mach-s3c64xx/Kconfig"
  786. endif
  787. source "arch/arm/mach-s5p6440/Kconfig"
  788. source "arch/arm/mach-s5p6442/Kconfig"
  789. source "arch/arm/mach-s5pc100/Kconfig"
  790. source "arch/arm/mach-s5pv210/Kconfig"
  791. source "arch/arm/mach-s5pv310/Kconfig"
  792. source "arch/arm/mach-shmobile/Kconfig"
  793. source "arch/arm/plat-stmp3xxx/Kconfig"
  794. source "arch/arm/mach-tegra/Kconfig"
  795. source "arch/arm/mach-u300/Kconfig"
  796. source "arch/arm/mach-ux500/Kconfig"
  797. source "arch/arm/mach-versatile/Kconfig"
  798. source "arch/arm/mach-vexpress/Kconfig"
  799. source "arch/arm/mach-w90x900/Kconfig"
  800. # Definitions to make life easier
  801. config ARCH_ACORN
  802. bool
  803. config PLAT_IOP
  804. bool
  805. select GENERIC_CLOCKEVENTS
  806. config PLAT_ORION
  807. bool
  808. config PLAT_PXA
  809. bool
  810. config PLAT_VERSATILE
  811. bool
  812. config ARM_TIMER_SP804
  813. bool
  814. source arch/arm/mm/Kconfig
  815. config IWMMXT
  816. bool "Enable iWMMXt support"
  817. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  818. default y if PXA27x || PXA3xx || ARCH_MMP
  819. help
  820. Enable support for iWMMXt context switching at run time if
  821. running on a CPU that supports it.
  822. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  823. config XSCALE_PMU
  824. bool
  825. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  826. default y
  827. config CPU_HAS_PMU
  828. depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
  829. (!ARCH_OMAP3 || OMAP3_EMU)
  830. default y
  831. bool
  832. if !MMU
  833. source "arch/arm/Kconfig-nommu"
  834. endif
  835. config ARM_ERRATA_411920
  836. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  837. depends on CPU_V6
  838. help
  839. Invalidation of the Instruction Cache operation can
  840. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  841. It does not affect the MPCore. This option enables the ARM Ltd.
  842. recommended workaround.
  843. config ARM_ERRATA_430973
  844. bool "ARM errata: Stale prediction on replaced interworking branch"
  845. depends on CPU_V7
  846. help
  847. This option enables the workaround for the 430973 Cortex-A8
  848. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  849. interworking branch is replaced with another code sequence at the
  850. same virtual address, whether due to self-modifying code or virtual
  851. to physical address re-mapping, Cortex-A8 does not recover from the
  852. stale interworking branch prediction. This results in Cortex-A8
  853. executing the new code sequence in the incorrect ARM or Thumb state.
  854. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  855. and also flushes the branch target cache at every context switch.
  856. Note that setting specific bits in the ACTLR register may not be
  857. available in non-secure mode.
  858. config ARM_ERRATA_458693
  859. bool "ARM errata: Processor deadlock when a false hazard is created"
  860. depends on CPU_V7
  861. help
  862. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  863. erratum. For very specific sequences of memory operations, it is
  864. possible for a hazard condition intended for a cache line to instead
  865. be incorrectly associated with a different cache line. This false
  866. hazard might then cause a processor deadlock. The workaround enables
  867. the L1 caching of the NEON accesses and disables the PLD instruction
  868. in the ACTLR register. Note that setting specific bits in the ACTLR
  869. register may not be available in non-secure mode.
  870. config ARM_ERRATA_460075
  871. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  872. depends on CPU_V7
  873. help
  874. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  875. erratum. Any asynchronous access to the L2 cache may encounter a
  876. situation in which recent store transactions to the L2 cache are lost
  877. and overwritten with stale memory contents from external memory. The
  878. workaround disables the write-allocate mode for the L2 cache via the
  879. ACTLR register. Note that setting specific bits in the ACTLR register
  880. may not be available in non-secure mode.
  881. config ARM_ERRATA_742230
  882. bool "ARM errata: DMB operation may be faulty"
  883. depends on CPU_V7 && SMP
  884. help
  885. This option enables the workaround for the 742230 Cortex-A9
  886. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  887. between two write operations may not ensure the correct visibility
  888. ordering of the two writes. This workaround sets a specific bit in
  889. the diagnostic register of the Cortex-A9 which causes the DMB
  890. instruction to behave as a DSB, ensuring the correct behaviour of
  891. the two writes.
  892. config ARM_ERRATA_742231
  893. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  894. depends on CPU_V7 && SMP
  895. help
  896. This option enables the workaround for the 742231 Cortex-A9
  897. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  898. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  899. accessing some data located in the same cache line, may get corrupted
  900. data due to bad handling of the address hazard when the line gets
  901. replaced from one of the CPUs at the same time as another CPU is
  902. accessing it. This workaround sets specific bits in the diagnostic
  903. register of the Cortex-A9 which reduces the linefill issuing
  904. capabilities of the processor.
  905. config PL310_ERRATA_588369
  906. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  907. depends on CACHE_L2X0 && ARCH_OMAP4
  908. help
  909. The PL310 L2 cache controller implements three types of Clean &
  910. Invalidate maintenance operations: by Physical Address
  911. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  912. They are architecturally defined to behave as the execution of a
  913. clean operation followed immediately by an invalidate operation,
  914. both performing to the same memory location. This functionality
  915. is not correctly implemented in PL310 as clean lines are not
  916. invalidated as a result of these operations. Note that this errata
  917. uses Texas Instrument's secure monitor api.
  918. config ARM_ERRATA_720789
  919. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  920. depends on CPU_V7 && SMP
  921. help
  922. This option enables the workaround for the 720789 Cortex-A9 (prior to
  923. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  924. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  925. As a consequence of this erratum, some TLB entries which should be
  926. invalidated are not, resulting in an incoherency in the system page
  927. tables. The workaround changes the TLB flushing routines to invalidate
  928. entries regardless of the ASID.
  929. endmenu
  930. source "arch/arm/common/Kconfig"
  931. menu "Bus support"
  932. config ARM_AMBA
  933. bool
  934. config ISA
  935. bool
  936. help
  937. Find out whether you have ISA slots on your motherboard. ISA is the
  938. name of a bus system, i.e. the way the CPU talks to the other stuff
  939. inside your box. Other bus systems are PCI, EISA, MicroChannel
  940. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  941. newer boards don't support it. If you have ISA, say Y, otherwise N.
  942. # Select ISA DMA controller support
  943. config ISA_DMA
  944. bool
  945. select ISA_DMA_API
  946. # Select ISA DMA interface
  947. config ISA_DMA_API
  948. bool
  949. config PCI
  950. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE || ARCH_CNS3XXX
  951. help
  952. Find out whether you have a PCI motherboard. PCI is the name of a
  953. bus system, i.e. the way the CPU talks to the other stuff inside
  954. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  955. VESA. If you have PCI, say Y, otherwise N.
  956. config PCI_DOMAINS
  957. bool
  958. depends on PCI
  959. config PCI_SYSCALL
  960. def_bool PCI
  961. # Select the host bridge type
  962. config PCI_HOST_VIA82C505
  963. bool
  964. depends on PCI && ARCH_SHARK
  965. default y
  966. config PCI_HOST_ITE8152
  967. bool
  968. depends on PCI && MACH_ARMCORE
  969. default y
  970. select DMABOUNCE
  971. source "drivers/pci/Kconfig"
  972. source "drivers/pcmcia/Kconfig"
  973. endmenu
  974. menu "Kernel Features"
  975. source "kernel/time/Kconfig"
  976. config SMP
  977. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  978. depends on EXPERIMENTAL
  979. depends on GENERIC_CLOCKEVENTS
  980. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  981. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
  982. ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4
  983. select USE_GENERIC_SMP_HELPERS
  984. select HAVE_ARM_SCU
  985. help
  986. This enables support for systems with more than one CPU. If you have
  987. a system with only one CPU, like most personal computers, say N. If
  988. you have a system with more than one CPU, say Y.
  989. If you say N here, the kernel will run on single and multiprocessor
  990. machines, but will use only one CPU of a multiprocessor machine. If
  991. you say Y here, the kernel will run on many, but not all, single
  992. processor machines. On a single processor machine, the kernel will
  993. run faster if you say N here.
  994. See also <file:Documentation/i386/IO-APIC.txt>,
  995. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  996. <http://www.linuxdoc.org/docs.html#howto>.
  997. If you don't know what to do here, say N.
  998. config SMP_ON_UP
  999. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1000. depends on EXPERIMENTAL
  1001. depends on SMP && !XIP && !THUMB2_KERNEL
  1002. default y
  1003. help
  1004. SMP kernels contain instructions which fail on non-SMP processors.
  1005. Enabling this option allows the kernel to modify itself to make
  1006. these instructions safe. Disabling it allows about 1K of space
  1007. savings.
  1008. If you don't know what to do here, say Y.
  1009. config HAVE_ARM_SCU
  1010. bool
  1011. depends on SMP
  1012. help
  1013. This option enables support for the ARM system coherency unit
  1014. config HAVE_ARM_TWD
  1015. bool
  1016. depends on SMP
  1017. help
  1018. This options enables support for the ARM timer and watchdog unit
  1019. choice
  1020. prompt "Memory split"
  1021. default VMSPLIT_3G
  1022. help
  1023. Select the desired split between kernel and user memory.
  1024. If you are not absolutely sure what you are doing, leave this
  1025. option alone!
  1026. config VMSPLIT_3G
  1027. bool "3G/1G user/kernel split"
  1028. config VMSPLIT_2G
  1029. bool "2G/2G user/kernel split"
  1030. config VMSPLIT_1G
  1031. bool "1G/3G user/kernel split"
  1032. endchoice
  1033. config PAGE_OFFSET
  1034. hex
  1035. default 0x40000000 if VMSPLIT_1G
  1036. default 0x80000000 if VMSPLIT_2G
  1037. default 0xC0000000
  1038. config NR_CPUS
  1039. int "Maximum number of CPUs (2-32)"
  1040. range 2 32
  1041. depends on SMP
  1042. default "4"
  1043. config HOTPLUG_CPU
  1044. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1045. depends on SMP && HOTPLUG && EXPERIMENTAL
  1046. help
  1047. Say Y here to experiment with turning CPUs off and on. CPUs
  1048. can be controlled through /sys/devices/system/cpu.
  1049. config LOCAL_TIMERS
  1050. bool "Use local timer interrupts"
  1051. depends on SMP
  1052. default y
  1053. select HAVE_ARM_TWD
  1054. help
  1055. Enable support for local timers on SMP platforms, rather then the
  1056. legacy IPI broadcast method. Local timers allows the system
  1057. accounting to be spread across the timer interval, preventing a
  1058. "thundering herd" at every timer tick.
  1059. source kernel/Kconfig.preempt
  1060. config HZ
  1061. int
  1062. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || \
  1063. ARCH_S5P6442 || ARCH_S5PV210 || ARCH_S5PV310
  1064. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1065. default AT91_TIMER_HZ if ARCH_AT91
  1066. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1067. default 100
  1068. config THUMB2_KERNEL
  1069. bool "Compile the kernel in Thumb-2 mode"
  1070. depends on CPU_V7 && EXPERIMENTAL
  1071. select AEABI
  1072. select ARM_ASM_UNIFIED
  1073. help
  1074. By enabling this option, the kernel will be compiled in
  1075. Thumb-2 mode. A compiler/assembler that understand the unified
  1076. ARM-Thumb syntax is needed.
  1077. If unsure, say N.
  1078. config ARM_ASM_UNIFIED
  1079. bool
  1080. config AEABI
  1081. bool "Use the ARM EABI to compile the kernel"
  1082. help
  1083. This option allows for the kernel to be compiled using the latest
  1084. ARM ABI (aka EABI). This is only useful if you are using a user
  1085. space environment that is also compiled with EABI.
  1086. Since there are major incompatibilities between the legacy ABI and
  1087. EABI, especially with regard to structure member alignment, this
  1088. option also changes the kernel syscall calling convention to
  1089. disambiguate both ABIs and allow for backward compatibility support
  1090. (selected with CONFIG_OABI_COMPAT).
  1091. To use this you need GCC version 4.0.0 or later.
  1092. config OABI_COMPAT
  1093. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1094. depends on AEABI && EXPERIMENTAL
  1095. default y
  1096. help
  1097. This option preserves the old syscall interface along with the
  1098. new (ARM EABI) one. It also provides a compatibility layer to
  1099. intercept syscalls that have structure arguments which layout
  1100. in memory differs between the legacy ABI and the new ARM EABI
  1101. (only for non "thumb" binaries). This option adds a tiny
  1102. overhead to all syscalls and produces a slightly larger kernel.
  1103. If you know you'll be using only pure EABI user space then you
  1104. can say N here. If this option is not selected and you attempt
  1105. to execute a legacy ABI binary then the result will be
  1106. UNPREDICTABLE (in fact it can be predicted that it won't work
  1107. at all). If in doubt say Y.
  1108. config ARCH_HAS_HOLES_MEMORYMODEL
  1109. bool
  1110. config ARCH_SPARSEMEM_ENABLE
  1111. bool
  1112. config ARCH_SPARSEMEM_DEFAULT
  1113. def_bool ARCH_SPARSEMEM_ENABLE
  1114. config ARCH_SELECT_MEMORY_MODEL
  1115. def_bool ARCH_SPARSEMEM_ENABLE
  1116. config HIGHMEM
  1117. bool "High Memory Support (EXPERIMENTAL)"
  1118. depends on MMU && EXPERIMENTAL
  1119. help
  1120. The address space of ARM processors is only 4 Gigabytes large
  1121. and it has to accommodate user address space, kernel address
  1122. space as well as some memory mapped IO. That means that, if you
  1123. have a large amount of physical memory and/or IO, not all of the
  1124. memory can be "permanently mapped" by the kernel. The physical
  1125. memory that is not permanently mapped is called "high memory".
  1126. Depending on the selected kernel/user memory split, minimum
  1127. vmalloc space and actual amount of RAM, you may not need this
  1128. option which should result in a slightly faster kernel.
  1129. If unsure, say n.
  1130. config HIGHPTE
  1131. bool "Allocate 2nd-level pagetables from highmem"
  1132. depends on HIGHMEM
  1133. depends on !OUTER_CACHE
  1134. config HW_PERF_EVENTS
  1135. bool "Enable hardware performance counter support for perf events"
  1136. depends on PERF_EVENTS && CPU_HAS_PMU
  1137. default y
  1138. help
  1139. Enable hardware performance counter support for perf events. If
  1140. disabled, perf events will use software events only.
  1141. config SPARSE_IRQ
  1142. def_bool n
  1143. help
  1144. This enables support for sparse irqs. This is useful in general
  1145. as most CPUs have a fairly sparse array of IRQ vectors, which
  1146. the irq_desc then maps directly on to. Systems with a high
  1147. number of off-chip IRQs will want to treat this as
  1148. experimental until they have been independently verified.
  1149. source "mm/Kconfig"
  1150. config FORCE_MAX_ZONEORDER
  1151. int "Maximum zone order" if ARCH_SHMOBILE
  1152. range 11 64 if ARCH_SHMOBILE
  1153. default "9" if SA1111
  1154. default "11"
  1155. help
  1156. The kernel memory allocator divides physically contiguous memory
  1157. blocks into "zones", where each zone is a power of two number of
  1158. pages. This option selects the largest power of two that the kernel
  1159. keeps in the memory allocator. If you need to allocate very large
  1160. blocks of physically contiguous memory, then you may need to
  1161. increase this value.
  1162. This config option is actually maximum order plus one. For example,
  1163. a value of 11 means that the largest free memory block is 2^10 pages.
  1164. config LEDS
  1165. bool "Timer and CPU usage LEDs"
  1166. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1167. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1168. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1169. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1170. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1171. ARCH_AT91 || ARCH_DAVINCI || \
  1172. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1173. help
  1174. If you say Y here, the LEDs on your machine will be used
  1175. to provide useful information about your current system status.
  1176. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1177. be able to select which LEDs are active using the options below. If
  1178. you are compiling a kernel for the EBSA-110 or the LART however, the
  1179. red LED will simply flash regularly to indicate that the system is
  1180. still functional. It is safe to say Y here if you have a CATS
  1181. system, but the driver will do nothing.
  1182. config LEDS_TIMER
  1183. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1184. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1185. || MACH_OMAP_PERSEUS2
  1186. depends on LEDS
  1187. depends on !GENERIC_CLOCKEVENTS
  1188. default y if ARCH_EBSA110
  1189. help
  1190. If you say Y here, one of the system LEDs (the green one on the
  1191. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1192. will flash regularly to indicate that the system is still
  1193. operational. This is mainly useful to kernel hackers who are
  1194. debugging unstable kernels.
  1195. The LART uses the same LED for both Timer LED and CPU usage LED
  1196. functions. You may choose to use both, but the Timer LED function
  1197. will overrule the CPU usage LED.
  1198. config LEDS_CPU
  1199. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1200. !ARCH_OMAP) \
  1201. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1202. || MACH_OMAP_PERSEUS2
  1203. depends on LEDS
  1204. help
  1205. If you say Y here, the red LED will be used to give a good real
  1206. time indication of CPU usage, by lighting whenever the idle task
  1207. is not currently executing.
  1208. The LART uses the same LED for both Timer LED and CPU usage LED
  1209. functions. You may choose to use both, but the Timer LED function
  1210. will overrule the CPU usage LED.
  1211. config ALIGNMENT_TRAP
  1212. bool
  1213. depends on CPU_CP15_MMU
  1214. default y if !ARCH_EBSA110
  1215. select HAVE_PROC_CPU if PROC_FS
  1216. help
  1217. ARM processors cannot fetch/store information which is not
  1218. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1219. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1220. fetch/store instructions will be emulated in software if you say
  1221. here, which has a severe performance impact. This is necessary for
  1222. correct operation of some network protocols. With an IP-only
  1223. configuration it is safe to say N, otherwise say Y.
  1224. config UACCESS_WITH_MEMCPY
  1225. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1226. depends on MMU && EXPERIMENTAL
  1227. default y if CPU_FEROCEON
  1228. help
  1229. Implement faster copy_to_user and clear_user methods for CPU
  1230. cores where a 8-word STM instruction give significantly higher
  1231. memory write throughput than a sequence of individual 32bit stores.
  1232. A possible side effect is a slight increase in scheduling latency
  1233. between threads sharing the same address space if they invoke
  1234. such copy operations with large buffers.
  1235. However, if the CPU data cache is using a write-allocate mode,
  1236. this option is unlikely to provide any performance gain.
  1237. config CC_STACKPROTECTOR
  1238. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1239. help
  1240. This option turns on the -fstack-protector GCC feature. This
  1241. feature puts, at the beginning of functions, a canary value on
  1242. the stack just before the return address, and validates
  1243. the value just before actually returning. Stack based buffer
  1244. overflows (that need to overwrite this return address) now also
  1245. overwrite the canary, which gets detected and the attack is then
  1246. neutralized via a kernel panic.
  1247. This feature requires gcc version 4.2 or above.
  1248. config DEPRECATED_PARAM_STRUCT
  1249. bool "Provide old way to pass kernel parameters"
  1250. help
  1251. This was deprecated in 2001 and announced to live on for 5 years.
  1252. Some old boot loaders still use this way.
  1253. endmenu
  1254. menu "Boot options"
  1255. # Compressed boot loader in ROM. Yes, we really want to ask about
  1256. # TEXT and BSS so we preserve their values in the config files.
  1257. config ZBOOT_ROM_TEXT
  1258. hex "Compressed ROM boot loader base address"
  1259. default "0"
  1260. help
  1261. The physical address at which the ROM-able zImage is to be
  1262. placed in the target. Platforms which normally make use of
  1263. ROM-able zImage formats normally set this to a suitable
  1264. value in their defconfig file.
  1265. If ZBOOT_ROM is not enabled, this has no effect.
  1266. config ZBOOT_ROM_BSS
  1267. hex "Compressed ROM boot loader BSS address"
  1268. default "0"
  1269. help
  1270. The base address of an area of read/write memory in the target
  1271. for the ROM-able zImage which must be available while the
  1272. decompressor is running. It must be large enough to hold the
  1273. entire decompressed kernel plus an additional 128 KiB.
  1274. Platforms which normally make use of ROM-able zImage formats
  1275. normally set this to a suitable value in their defconfig file.
  1276. If ZBOOT_ROM is not enabled, this has no effect.
  1277. config ZBOOT_ROM
  1278. bool "Compressed boot loader in ROM/flash"
  1279. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1280. help
  1281. Say Y here if you intend to execute your compressed kernel image
  1282. (zImage) directly from ROM or flash. If unsure, say N.
  1283. config CMDLINE
  1284. string "Default kernel command string"
  1285. default ""
  1286. help
  1287. On some architectures (EBSA110 and CATS), there is currently no way
  1288. for the boot loader to pass arguments to the kernel. For these
  1289. architectures, you should supply some command-line options at build
  1290. time by entering them here. As a minimum, you should specify the
  1291. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1292. config CMDLINE_FORCE
  1293. bool "Always use the default kernel command string"
  1294. depends on CMDLINE != ""
  1295. help
  1296. Always use the default kernel command string, even if the boot
  1297. loader passes other arguments to the kernel.
  1298. This is useful if you cannot or don't want to change the
  1299. command-line options your boot loader passes to the kernel.
  1300. If unsure, say N.
  1301. config XIP_KERNEL
  1302. bool "Kernel Execute-In-Place from ROM"
  1303. depends on !ZBOOT_ROM
  1304. help
  1305. Execute-In-Place allows the kernel to run from non-volatile storage
  1306. directly addressable by the CPU, such as NOR flash. This saves RAM
  1307. space since the text section of the kernel is not loaded from flash
  1308. to RAM. Read-write sections, such as the data section and stack,
  1309. are still copied to RAM. The XIP kernel is not compressed since
  1310. it has to run directly from flash, so it will take more space to
  1311. store it. The flash address used to link the kernel object files,
  1312. and for storing it, is configuration dependent. Therefore, if you
  1313. say Y here, you must know the proper physical address where to
  1314. store the kernel image depending on your own flash memory usage.
  1315. Also note that the make target becomes "make xipImage" rather than
  1316. "make zImage" or "make Image". The final kernel binary to put in
  1317. ROM memory will be arch/arm/boot/xipImage.
  1318. If unsure, say N.
  1319. config XIP_PHYS_ADDR
  1320. hex "XIP Kernel Physical Location"
  1321. depends on XIP_KERNEL
  1322. default "0x00080000"
  1323. help
  1324. This is the physical address in your flash memory the kernel will
  1325. be linked for and stored to. This address is dependent on your
  1326. own flash usage.
  1327. config KEXEC
  1328. bool "Kexec system call (EXPERIMENTAL)"
  1329. depends on EXPERIMENTAL
  1330. help
  1331. kexec is a system call that implements the ability to shutdown your
  1332. current kernel, and to start another kernel. It is like a reboot
  1333. but it is independent of the system firmware. And like a reboot
  1334. you can start any kernel with it, not just Linux.
  1335. It is an ongoing process to be certain the hardware in a machine
  1336. is properly shutdown, so do not be surprised if this code does not
  1337. initially work for you. It may help to enable device hotplugging
  1338. support.
  1339. config ATAGS_PROC
  1340. bool "Export atags in procfs"
  1341. depends on KEXEC
  1342. default y
  1343. help
  1344. Should the atags used to boot the kernel be exported in an "atags"
  1345. file in procfs. Useful with kexec.
  1346. config AUTO_ZRELADDR
  1347. bool "Auto calculation of the decompressed kernel image address"
  1348. depends on !ZBOOT_ROM && !ARCH_U300
  1349. help
  1350. ZRELADDR is the physical address where the decompressed kernel
  1351. image will be placed. If AUTO_ZRELADDR is selected, the address
  1352. will be determined at run-time by masking the current IP with
  1353. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1354. from start of memory.
  1355. endmenu
  1356. menu "CPU Power Management"
  1357. if ARCH_HAS_CPUFREQ
  1358. source "drivers/cpufreq/Kconfig"
  1359. config CPU_FREQ_SA1100
  1360. bool
  1361. config CPU_FREQ_SA1110
  1362. bool
  1363. config CPU_FREQ_INTEGRATOR
  1364. tristate "CPUfreq driver for ARM Integrator CPUs"
  1365. depends on ARCH_INTEGRATOR && CPU_FREQ
  1366. default y
  1367. help
  1368. This enables the CPUfreq driver for ARM Integrator CPUs.
  1369. For details, take a look at <file:Documentation/cpu-freq>.
  1370. If in doubt, say Y.
  1371. config CPU_FREQ_PXA
  1372. bool
  1373. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1374. default y
  1375. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1376. config CPU_FREQ_S3C64XX
  1377. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1378. depends on CPU_FREQ && CPU_S3C6410
  1379. config CPU_FREQ_S3C
  1380. bool
  1381. help
  1382. Internal configuration node for common cpufreq on Samsung SoC
  1383. config CPU_FREQ_S3C24XX
  1384. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1385. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1386. select CPU_FREQ_S3C
  1387. help
  1388. This enables the CPUfreq driver for the Samsung S3C24XX family
  1389. of CPUs.
  1390. For details, take a look at <file:Documentation/cpu-freq>.
  1391. If in doubt, say N.
  1392. config CPU_FREQ_S3C24XX_PLL
  1393. bool "Support CPUfreq changing of PLL frequency"
  1394. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1395. help
  1396. Compile in support for changing the PLL frequency from the
  1397. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1398. after a frequency change, so by default it is not enabled.
  1399. This also means that the PLL tables for the selected CPU(s) will
  1400. be built which may increase the size of the kernel image.
  1401. config CPU_FREQ_S3C24XX_DEBUG
  1402. bool "Debug CPUfreq Samsung driver core"
  1403. depends on CPU_FREQ_S3C24XX
  1404. help
  1405. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1406. config CPU_FREQ_S3C24XX_IODEBUG
  1407. bool "Debug CPUfreq Samsung driver IO timing"
  1408. depends on CPU_FREQ_S3C24XX
  1409. help
  1410. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1411. config CPU_FREQ_S3C24XX_DEBUGFS
  1412. bool "Export debugfs for CPUFreq"
  1413. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1414. help
  1415. Export status information via debugfs.
  1416. endif
  1417. source "drivers/cpuidle/Kconfig"
  1418. endmenu
  1419. menu "Floating point emulation"
  1420. comment "At least one emulation must be selected"
  1421. config FPE_NWFPE
  1422. bool "NWFPE math emulation"
  1423. depends on !AEABI || OABI_COMPAT
  1424. ---help---
  1425. Say Y to include the NWFPE floating point emulator in the kernel.
  1426. This is necessary to run most binaries. Linux does not currently
  1427. support floating point hardware so you need to say Y here even if
  1428. your machine has an FPA or floating point co-processor podule.
  1429. You may say N here if you are going to load the Acorn FPEmulator
  1430. early in the bootup.
  1431. config FPE_NWFPE_XP
  1432. bool "Support extended precision"
  1433. depends on FPE_NWFPE
  1434. help
  1435. Say Y to include 80-bit support in the kernel floating-point
  1436. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1437. Note that gcc does not generate 80-bit operations by default,
  1438. so in most cases this option only enlarges the size of the
  1439. floating point emulator without any good reason.
  1440. You almost surely want to say N here.
  1441. config FPE_FASTFPE
  1442. bool "FastFPE math emulation (EXPERIMENTAL)"
  1443. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1444. ---help---
  1445. Say Y here to include the FAST floating point emulator in the kernel.
  1446. This is an experimental much faster emulator which now also has full
  1447. precision for the mantissa. It does not support any exceptions.
  1448. It is very simple, and approximately 3-6 times faster than NWFPE.
  1449. It should be sufficient for most programs. It may be not suitable
  1450. for scientific calculations, but you have to check this for yourself.
  1451. If you do not feel you need a faster FP emulation you should better
  1452. choose NWFPE.
  1453. config VFP
  1454. bool "VFP-format floating point maths"
  1455. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1456. help
  1457. Say Y to include VFP support code in the kernel. This is needed
  1458. if your hardware includes a VFP unit.
  1459. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1460. release notes and additional status information.
  1461. Say N if your target does not have VFP hardware.
  1462. config VFPv3
  1463. bool
  1464. depends on VFP
  1465. default y if CPU_V7
  1466. config NEON
  1467. bool "Advanced SIMD (NEON) Extension support"
  1468. depends on VFPv3 && CPU_V7
  1469. help
  1470. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1471. Extension.
  1472. endmenu
  1473. menu "Userspace binary formats"
  1474. source "fs/Kconfig.binfmt"
  1475. config ARTHUR
  1476. tristate "RISC OS personality"
  1477. depends on !AEABI
  1478. help
  1479. Say Y here to include the kernel code necessary if you want to run
  1480. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1481. experimental; if this sounds frightening, say N and sleep in peace.
  1482. You can also say M here to compile this support as a module (which
  1483. will be called arthur).
  1484. endmenu
  1485. menu "Power management options"
  1486. source "kernel/power/Kconfig"
  1487. config ARCH_SUSPEND_POSSIBLE
  1488. def_bool y
  1489. endmenu
  1490. source "net/Kconfig"
  1491. source "drivers/Kconfig"
  1492. source "fs/Kconfig"
  1493. source "arch/arm/Kconfig.debug"
  1494. source "security/Kconfig"
  1495. source "crypto/Kconfig"
  1496. source "lib/Kconfig"