Kconfig 50 KB

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  1. config ARM
  2. bool
  3. default y
  4. select HAVE_AOUT
  5. select HAVE_IDE
  6. select HAVE_MEMBLOCK
  7. select RTC_LIB
  8. select SYS_SUPPORTS_APM_EMULATION
  9. select GENERIC_ATOMIC64 if (!CPU_32v6K)
  10. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  11. select HAVE_ARCH_KGDB
  12. select HAVE_KPROBES if (!XIP_KERNEL)
  13. select HAVE_KRETPROBES if (HAVE_KPROBES)
  14. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  15. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  16. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  17. select HAVE_GENERIC_DMA_COHERENT
  18. select HAVE_KERNEL_GZIP
  19. select HAVE_KERNEL_LZO
  20. select HAVE_KERNEL_LZMA
  21. select HAVE_IRQ_WORK
  22. select HAVE_PERF_EVENTS
  23. select PERF_USE_VMALLOC
  24. select HAVE_REGS_AND_STACK_ACCESS_API
  25. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V7))
  26. help
  27. The ARM series is a line of low-power-consumption RISC chip designs
  28. licensed by ARM Ltd and targeted at embedded applications and
  29. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  30. manufactured, but legacy ARM-based PC hardware remains popular in
  31. Europe. There is an ARM Linux project with a web page at
  32. <http://www.arm.linux.org.uk/>.
  33. config HAVE_PWM
  34. bool
  35. config SYS_SUPPORTS_APM_EMULATION
  36. bool
  37. config GENERIC_GPIO
  38. bool
  39. config ARCH_USES_GETTIMEOFFSET
  40. bool
  41. default n
  42. config GENERIC_CLOCKEVENTS
  43. bool
  44. config GENERIC_CLOCKEVENTS_BROADCAST
  45. bool
  46. depends on GENERIC_CLOCKEVENTS
  47. default y if SMP
  48. config HAVE_TCM
  49. bool
  50. select GENERIC_ALLOCATOR
  51. config HAVE_PROC_CPU
  52. bool
  53. config NO_IOPORT
  54. bool
  55. config EISA
  56. bool
  57. ---help---
  58. The Extended Industry Standard Architecture (EISA) bus was
  59. developed as an open alternative to the IBM MicroChannel bus.
  60. The EISA bus provided some of the features of the IBM MicroChannel
  61. bus while maintaining backward compatibility with cards made for
  62. the older ISA bus. The EISA bus saw limited use between 1988 and
  63. 1995 when it was made obsolete by the PCI bus.
  64. Say Y here if you are building a kernel for an EISA-based machine.
  65. Otherwise, say N.
  66. config SBUS
  67. bool
  68. config MCA
  69. bool
  70. help
  71. MicroChannel Architecture is found in some IBM PS/2 machines and
  72. laptops. It is a bus system similar to PCI or ISA. See
  73. <file:Documentation/mca.txt> (and especially the web page given
  74. there) before attempting to build an MCA bus kernel.
  75. config GENERIC_HARDIRQS
  76. bool
  77. default y
  78. config STACKTRACE_SUPPORT
  79. bool
  80. default y
  81. config HAVE_LATENCYTOP_SUPPORT
  82. bool
  83. depends on !SMP
  84. default y
  85. config LOCKDEP_SUPPORT
  86. bool
  87. default y
  88. config TRACE_IRQFLAGS_SUPPORT
  89. bool
  90. default y
  91. config HARDIRQS_SW_RESEND
  92. bool
  93. default y
  94. config GENERIC_IRQ_PROBE
  95. bool
  96. default y
  97. config GENERIC_LOCKBREAK
  98. bool
  99. default y
  100. depends on SMP && PREEMPT
  101. config RWSEM_GENERIC_SPINLOCK
  102. bool
  103. default y
  104. config RWSEM_XCHGADD_ALGORITHM
  105. bool
  106. config ARCH_HAS_ILOG2_U32
  107. bool
  108. config ARCH_HAS_ILOG2_U64
  109. bool
  110. config ARCH_HAS_CPUFREQ
  111. bool
  112. help
  113. Internal node to signify that the ARCH has CPUFREQ support
  114. and that the relevant menu configurations are displayed for
  115. it.
  116. config ARCH_HAS_CPU_IDLE_WAIT
  117. def_bool y
  118. config GENERIC_HWEIGHT
  119. bool
  120. default y
  121. config GENERIC_CALIBRATE_DELAY
  122. bool
  123. default y
  124. config ARCH_MAY_HAVE_PC_FDC
  125. bool
  126. config ZONE_DMA
  127. bool
  128. config NEED_DMA_MAP_STATE
  129. def_bool y
  130. config GENERIC_ISA_DMA
  131. bool
  132. config FIQ
  133. bool
  134. config ARCH_MTD_XIP
  135. bool
  136. config GENERIC_HARDIRQS_NO__DO_IRQ
  137. def_bool y
  138. config ARM_L1_CACHE_SHIFT_6
  139. bool
  140. help
  141. Setting ARM L1 cache line size to 64 Bytes.
  142. config VECTORS_BASE
  143. hex
  144. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  145. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  146. default 0x00000000
  147. help
  148. The base address of exception vectors.
  149. source "init/Kconfig"
  150. source "kernel/Kconfig.freezer"
  151. menu "System Type"
  152. config MMU
  153. bool "MMU-based Paged Memory Management Support"
  154. default y
  155. help
  156. Select if you want MMU-based virtualised addressing space
  157. support by paged memory management. If unsure, say 'Y'.
  158. #
  159. # The "ARM system type" choice list is ordered alphabetically by option
  160. # text. Please add new entries in the option alphabetic order.
  161. #
  162. choice
  163. prompt "ARM system type"
  164. default ARCH_VERSATILE
  165. config ARCH_AAEC2000
  166. bool "Agilent AAEC-2000 based"
  167. select CPU_ARM920T
  168. select ARM_AMBA
  169. select HAVE_CLK
  170. select ARCH_USES_GETTIMEOFFSET
  171. help
  172. This enables support for systems based on the Agilent AAEC-2000
  173. config ARCH_INTEGRATOR
  174. bool "ARM Ltd. Integrator family"
  175. select ARM_AMBA
  176. select ARCH_HAS_CPUFREQ
  177. select COMMON_CLKDEV
  178. select ICST
  179. select GENERIC_CLOCKEVENTS
  180. select PLAT_VERSATILE
  181. help
  182. Support for ARM's Integrator platform.
  183. config ARCH_REALVIEW
  184. bool "ARM Ltd. RealView family"
  185. select ARM_AMBA
  186. select COMMON_CLKDEV
  187. select ICST
  188. select GENERIC_CLOCKEVENTS
  189. select ARCH_WANT_OPTIONAL_GPIOLIB
  190. select PLAT_VERSATILE
  191. select ARM_TIMER_SP804
  192. select GPIO_PL061 if GPIOLIB
  193. help
  194. This enables support for ARM Ltd RealView boards.
  195. config ARCH_VERSATILE
  196. bool "ARM Ltd. Versatile family"
  197. select ARM_AMBA
  198. select ARM_VIC
  199. select COMMON_CLKDEV
  200. select ICST
  201. select GENERIC_CLOCKEVENTS
  202. select ARCH_WANT_OPTIONAL_GPIOLIB
  203. select PLAT_VERSATILE
  204. select ARM_TIMER_SP804
  205. help
  206. This enables support for ARM Ltd Versatile board.
  207. config ARCH_VEXPRESS
  208. bool "ARM Ltd. Versatile Express family"
  209. select ARCH_WANT_OPTIONAL_GPIOLIB
  210. select ARM_AMBA
  211. select ARM_TIMER_SP804
  212. select COMMON_CLKDEV
  213. select GENERIC_CLOCKEVENTS
  214. select HAVE_CLK
  215. select ICST
  216. select PLAT_VERSATILE
  217. help
  218. This enables support for the ARM Ltd Versatile Express boards.
  219. config ARCH_AT91
  220. bool "Atmel AT91"
  221. select ARCH_REQUIRE_GPIOLIB
  222. select HAVE_CLK
  223. help
  224. This enables support for systems based on the Atmel AT91RM9200,
  225. AT91SAM9 and AT91CAP9 processors.
  226. config ARCH_BCMRING
  227. bool "Broadcom BCMRING"
  228. depends on MMU
  229. select CPU_V6
  230. select ARM_AMBA
  231. select COMMON_CLKDEV
  232. select GENERIC_CLOCKEVENTS
  233. select ARCH_WANT_OPTIONAL_GPIOLIB
  234. help
  235. Support for Broadcom's BCMRing platform.
  236. config ARCH_CLPS711X
  237. bool "Cirrus Logic CLPS711x/EP721x-based"
  238. select CPU_ARM720T
  239. select ARCH_USES_GETTIMEOFFSET
  240. help
  241. Support for Cirrus Logic 711x/721x based boards.
  242. config ARCH_CNS3XXX
  243. bool "Cavium Networks CNS3XXX family"
  244. select CPU_V6
  245. select GENERIC_CLOCKEVENTS
  246. select ARM_GIC
  247. select PCI_DOMAINS if PCI
  248. help
  249. Support for Cavium Networks CNS3XXX platform.
  250. config ARCH_GEMINI
  251. bool "Cortina Systems Gemini"
  252. select CPU_FA526
  253. select ARCH_REQUIRE_GPIOLIB
  254. select ARCH_USES_GETTIMEOFFSET
  255. help
  256. Support for the Cortina Systems Gemini family SoCs
  257. config ARCH_EBSA110
  258. bool "EBSA-110"
  259. select CPU_SA110
  260. select ISA
  261. select NO_IOPORT
  262. select ARCH_USES_GETTIMEOFFSET
  263. help
  264. This is an evaluation board for the StrongARM processor available
  265. from Digital. It has limited hardware on-board, including an
  266. Ethernet interface, two PCMCIA sockets, two serial ports and a
  267. parallel port.
  268. config ARCH_EP93XX
  269. bool "EP93xx-based"
  270. select CPU_ARM920T
  271. select ARM_AMBA
  272. select ARM_VIC
  273. select COMMON_CLKDEV
  274. select ARCH_REQUIRE_GPIOLIB
  275. select ARCH_HAS_HOLES_MEMORYMODEL
  276. select ARCH_USES_GETTIMEOFFSET
  277. help
  278. This enables support for the Cirrus EP93xx series of CPUs.
  279. config ARCH_FOOTBRIDGE
  280. bool "FootBridge"
  281. select CPU_SA110
  282. select FOOTBRIDGE
  283. select ARCH_USES_GETTIMEOFFSET
  284. help
  285. Support for systems based on the DC21285 companion chip
  286. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  287. config ARCH_MXC
  288. bool "Freescale MXC/iMX-based"
  289. select GENERIC_CLOCKEVENTS
  290. select ARCH_REQUIRE_GPIOLIB
  291. select COMMON_CLKDEV
  292. help
  293. Support for Freescale MXC/iMX-based family of processors
  294. config ARCH_STMP3XXX
  295. bool "Freescale STMP3xxx"
  296. select CPU_ARM926T
  297. select COMMON_CLKDEV
  298. select ARCH_REQUIRE_GPIOLIB
  299. select GENERIC_CLOCKEVENTS
  300. select USB_ARCH_HAS_EHCI
  301. help
  302. Support for systems based on the Freescale 3xxx CPUs.
  303. config ARCH_NETX
  304. bool "Hilscher NetX based"
  305. select CPU_ARM926T
  306. select ARM_VIC
  307. select GENERIC_CLOCKEVENTS
  308. help
  309. This enables support for systems based on the Hilscher NetX Soc
  310. config ARCH_H720X
  311. bool "Hynix HMS720x-based"
  312. select CPU_ARM720T
  313. select ISA_DMA_API
  314. select ARCH_USES_GETTIMEOFFSET
  315. help
  316. This enables support for systems based on the Hynix HMS720x
  317. config ARCH_IOP13XX
  318. bool "IOP13xx-based"
  319. depends on MMU
  320. select CPU_XSC3
  321. select PLAT_IOP
  322. select PCI
  323. select ARCH_SUPPORTS_MSI
  324. select VMSPLIT_1G
  325. help
  326. Support for Intel's IOP13XX (XScale) family of processors.
  327. config ARCH_IOP32X
  328. bool "IOP32x-based"
  329. depends on MMU
  330. select CPU_XSCALE
  331. select PLAT_IOP
  332. select PCI
  333. select ARCH_REQUIRE_GPIOLIB
  334. help
  335. Support for Intel's 80219 and IOP32X (XScale) family of
  336. processors.
  337. config ARCH_IOP33X
  338. bool "IOP33x-based"
  339. depends on MMU
  340. select CPU_XSCALE
  341. select PLAT_IOP
  342. select PCI
  343. select ARCH_REQUIRE_GPIOLIB
  344. help
  345. Support for Intel's IOP33X (XScale) family of processors.
  346. config ARCH_IXP23XX
  347. bool "IXP23XX-based"
  348. depends on MMU
  349. select CPU_XSC3
  350. select PCI
  351. select ARCH_USES_GETTIMEOFFSET
  352. help
  353. Support for Intel's IXP23xx (XScale) family of processors.
  354. config ARCH_IXP2000
  355. bool "IXP2400/2800-based"
  356. depends on MMU
  357. select CPU_XSCALE
  358. select PCI
  359. select ARCH_USES_GETTIMEOFFSET
  360. help
  361. Support for Intel's IXP2400/2800 (XScale) family of processors.
  362. config ARCH_IXP4XX
  363. bool "IXP4xx-based"
  364. depends on MMU
  365. select CPU_XSCALE
  366. select GENERIC_GPIO
  367. select GENERIC_CLOCKEVENTS
  368. select DMABOUNCE if PCI
  369. help
  370. Support for Intel's IXP4XX (XScale) family of processors.
  371. config ARCH_DOVE
  372. bool "Marvell Dove"
  373. select PCI
  374. select ARCH_REQUIRE_GPIOLIB
  375. select GENERIC_CLOCKEVENTS
  376. select PLAT_ORION
  377. help
  378. Support for the Marvell Dove SoC 88AP510
  379. config ARCH_KIRKWOOD
  380. bool "Marvell Kirkwood"
  381. select CPU_FEROCEON
  382. select PCI
  383. select ARCH_REQUIRE_GPIOLIB
  384. select GENERIC_CLOCKEVENTS
  385. select PLAT_ORION
  386. help
  387. Support for the following Marvell Kirkwood series SoCs:
  388. 88F6180, 88F6192 and 88F6281.
  389. config ARCH_LOKI
  390. bool "Marvell Loki (88RC8480)"
  391. select CPU_FEROCEON
  392. select GENERIC_CLOCKEVENTS
  393. select PLAT_ORION
  394. help
  395. Support for the Marvell Loki (88RC8480) SoC.
  396. config ARCH_LPC32XX
  397. bool "NXP LPC32XX"
  398. select CPU_ARM926T
  399. select ARCH_REQUIRE_GPIOLIB
  400. select HAVE_IDE
  401. select ARM_AMBA
  402. select USB_ARCH_HAS_OHCI
  403. select COMMON_CLKDEV
  404. select GENERIC_TIME
  405. select GENERIC_CLOCKEVENTS
  406. help
  407. Support for the NXP LPC32XX family of processors
  408. config ARCH_MV78XX0
  409. bool "Marvell MV78xx0"
  410. select CPU_FEROCEON
  411. select PCI
  412. select ARCH_REQUIRE_GPIOLIB
  413. select GENERIC_CLOCKEVENTS
  414. select PLAT_ORION
  415. help
  416. Support for the following Marvell MV78xx0 series SoCs:
  417. MV781x0, MV782x0.
  418. config ARCH_ORION5X
  419. bool "Marvell Orion"
  420. depends on MMU
  421. select CPU_FEROCEON
  422. select PCI
  423. select ARCH_REQUIRE_GPIOLIB
  424. select GENERIC_CLOCKEVENTS
  425. select PLAT_ORION
  426. help
  427. Support for the following Marvell Orion 5x series SoCs:
  428. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  429. Orion-2 (5281), Orion-1-90 (6183).
  430. config ARCH_MMP
  431. bool "Marvell PXA168/910/MMP2"
  432. depends on MMU
  433. select ARCH_REQUIRE_GPIOLIB
  434. select COMMON_CLKDEV
  435. select GENERIC_CLOCKEVENTS
  436. select TICK_ONESHOT
  437. select PLAT_PXA
  438. select SPARSE_IRQ
  439. help
  440. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  441. config ARCH_KS8695
  442. bool "Micrel/Kendin KS8695"
  443. select CPU_ARM922T
  444. select ARCH_REQUIRE_GPIOLIB
  445. select ARCH_USES_GETTIMEOFFSET
  446. help
  447. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  448. System-on-Chip devices.
  449. config ARCH_NS9XXX
  450. bool "NetSilicon NS9xxx"
  451. select CPU_ARM926T
  452. select GENERIC_GPIO
  453. select GENERIC_CLOCKEVENTS
  454. select HAVE_CLK
  455. help
  456. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  457. System.
  458. <http://www.digi.com/products/microprocessors/index.jsp>
  459. config ARCH_W90X900
  460. bool "Nuvoton W90X900 CPU"
  461. select CPU_ARM926T
  462. select ARCH_REQUIRE_GPIOLIB
  463. select COMMON_CLKDEV
  464. select GENERIC_CLOCKEVENTS
  465. help
  466. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  467. At present, the w90x900 has been renamed nuc900, regarding
  468. the ARM series product line, you can login the following
  469. link address to know more.
  470. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  471. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  472. config ARCH_NUC93X
  473. bool "Nuvoton NUC93X CPU"
  474. select CPU_ARM926T
  475. select COMMON_CLKDEV
  476. help
  477. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  478. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  479. config ARCH_TEGRA
  480. bool "NVIDIA Tegra"
  481. select GENERIC_TIME
  482. select GENERIC_CLOCKEVENTS
  483. select GENERIC_GPIO
  484. select HAVE_CLK
  485. select COMMON_CLKDEV
  486. select ARCH_HAS_BARRIERS if CACHE_L2X0
  487. select ARCH_HAS_CPUFREQ
  488. help
  489. This enables support for NVIDIA Tegra based systems (Tegra APX,
  490. Tegra 6xx and Tegra 2 series).
  491. config ARCH_PNX4008
  492. bool "Philips Nexperia PNX4008 Mobile"
  493. select CPU_ARM926T
  494. select COMMON_CLKDEV
  495. select ARCH_USES_GETTIMEOFFSET
  496. help
  497. This enables support for Philips PNX4008 mobile platform.
  498. config ARCH_PXA
  499. bool "PXA2xx/PXA3xx-based"
  500. depends on MMU
  501. select ARCH_MTD_XIP
  502. select ARCH_HAS_CPUFREQ
  503. select COMMON_CLKDEV
  504. select ARCH_REQUIRE_GPIOLIB
  505. select GENERIC_CLOCKEVENTS
  506. select TICK_ONESHOT
  507. select PLAT_PXA
  508. select SPARSE_IRQ
  509. help
  510. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  511. config ARCH_MSM
  512. bool "Qualcomm MSM"
  513. select HAVE_CLK
  514. select GENERIC_CLOCKEVENTS
  515. select ARCH_REQUIRE_GPIOLIB
  516. help
  517. Support for Qualcomm MSM/QSD based systems. This runs on the
  518. apps processor of the MSM/QSD and depends on a shared memory
  519. interface to the modem processor which runs the baseband
  520. stack and controls some vital subsystems
  521. (clock and power control, etc).
  522. config ARCH_SHMOBILE
  523. bool "Renesas SH-Mobile"
  524. help
  525. Support for Renesas's SH-Mobile ARM platforms
  526. config ARCH_RPC
  527. bool "RiscPC"
  528. select ARCH_ACORN
  529. select FIQ
  530. select TIMER_ACORN
  531. select ARCH_MAY_HAVE_PC_FDC
  532. select HAVE_PATA_PLATFORM
  533. select ISA_DMA_API
  534. select NO_IOPORT
  535. select ARCH_SPARSEMEM_ENABLE
  536. select ARCH_USES_GETTIMEOFFSET
  537. help
  538. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  539. CD-ROM interface, serial and parallel port, and the floppy drive.
  540. config ARCH_SA1100
  541. bool "SA1100-based"
  542. select CPU_SA1100
  543. select ISA
  544. select ARCH_SPARSEMEM_ENABLE
  545. select ARCH_MTD_XIP
  546. select ARCH_HAS_CPUFREQ
  547. select CPU_FREQ
  548. select GENERIC_CLOCKEVENTS
  549. select HAVE_CLK
  550. select TICK_ONESHOT
  551. select ARCH_REQUIRE_GPIOLIB
  552. help
  553. Support for StrongARM 11x0 based boards.
  554. config ARCH_S3C2410
  555. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  556. select GENERIC_GPIO
  557. select ARCH_HAS_CPUFREQ
  558. select HAVE_CLK
  559. select ARCH_USES_GETTIMEOFFSET
  560. select HAVE_S3C2410_I2C
  561. help
  562. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  563. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  564. the Samsung SMDK2410 development board (and derivatives).
  565. Note, the S3C2416 and the S3C2450 are so close that they even share
  566. the same SoC ID code. This means that there is no seperate machine
  567. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  568. config ARCH_S3C64XX
  569. bool "Samsung S3C64XX"
  570. select PLAT_SAMSUNG
  571. select CPU_V6
  572. select ARM_VIC
  573. select HAVE_CLK
  574. select NO_IOPORT
  575. select ARCH_USES_GETTIMEOFFSET
  576. select ARCH_HAS_CPUFREQ
  577. select ARCH_REQUIRE_GPIOLIB
  578. select SAMSUNG_CLKSRC
  579. select SAMSUNG_IRQ_VIC_TIMER
  580. select SAMSUNG_IRQ_UART
  581. select S3C_GPIO_TRACK
  582. select S3C_GPIO_PULL_UPDOWN
  583. select S3C_GPIO_CFG_S3C24XX
  584. select S3C_GPIO_CFG_S3C64XX
  585. select S3C_DEV_NAND
  586. select USB_ARCH_HAS_OHCI
  587. select SAMSUNG_GPIOLIB_4BIT
  588. select HAVE_S3C2410_I2C
  589. select HAVE_S3C2410_WATCHDOG
  590. help
  591. Samsung S3C64XX series based systems
  592. config ARCH_S5P64X0
  593. bool "Samsung S5P6440 S5P6450"
  594. select CPU_V6
  595. select GENERIC_GPIO
  596. select HAVE_CLK
  597. select HAVE_S3C2410_WATCHDOG
  598. select ARCH_USES_GETTIMEOFFSET
  599. select HAVE_S3C2410_I2C
  600. select HAVE_S3C_RTC
  601. help
  602. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  603. SMDK6450.
  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_TCC_926
  657. bool "Telechips TCC ARM926-based systems"
  658. select CPU_ARM926T
  659. select HAVE_CLK
  660. select COMMON_CLKDEV
  661. select GENERIC_CLOCKEVENTS
  662. help
  663. Support for Telechips TCC ARM926-based systems.
  664. config ARCH_LH7A40X
  665. bool "Sharp LH7A40X"
  666. select CPU_ARM922T
  667. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  668. select ARCH_USES_GETTIMEOFFSET
  669. help
  670. Say Y here for systems based on one of the Sharp LH7A40X
  671. System on a Chip processors. These CPUs include an ARM922T
  672. core with a wide array of integrated devices for
  673. hand-held and low-power applications.
  674. config ARCH_U300
  675. bool "ST-Ericsson U300 Series"
  676. depends on MMU
  677. select CPU_ARM926T
  678. select HAVE_TCM
  679. select ARM_AMBA
  680. select ARM_VIC
  681. select GENERIC_CLOCKEVENTS
  682. select COMMON_CLKDEV
  683. select GENERIC_GPIO
  684. help
  685. Support for ST-Ericsson U300 series mobile platforms.
  686. config ARCH_U8500
  687. bool "ST-Ericsson U8500 Series"
  688. select CPU_V7
  689. select ARM_AMBA
  690. select GENERIC_CLOCKEVENTS
  691. select COMMON_CLKDEV
  692. select ARCH_REQUIRE_GPIOLIB
  693. help
  694. Support for ST-Ericsson's Ux500 architecture
  695. config ARCH_NOMADIK
  696. bool "STMicroelectronics Nomadik"
  697. select ARM_AMBA
  698. select ARM_VIC
  699. select CPU_ARM926T
  700. select COMMON_CLKDEV
  701. select GENERIC_CLOCKEVENTS
  702. select ARCH_REQUIRE_GPIOLIB
  703. help
  704. Support for the Nomadik platform by ST-Ericsson
  705. config ARCH_DAVINCI
  706. bool "TI DaVinci"
  707. select GENERIC_CLOCKEVENTS
  708. select ARCH_REQUIRE_GPIOLIB
  709. select ZONE_DMA
  710. select HAVE_IDE
  711. select COMMON_CLKDEV
  712. select GENERIC_ALLOCATOR
  713. select ARCH_HAS_HOLES_MEMORYMODEL
  714. help
  715. Support for TI's DaVinci platform.
  716. config ARCH_OMAP
  717. bool "TI OMAP"
  718. select HAVE_CLK
  719. select ARCH_REQUIRE_GPIOLIB
  720. select ARCH_HAS_CPUFREQ
  721. select GENERIC_CLOCKEVENTS
  722. select ARCH_HAS_HOLES_MEMORYMODEL
  723. help
  724. Support for TI's OMAP platform (OMAP1/2/3/4).
  725. config PLAT_SPEAR
  726. bool "ST SPEAr"
  727. select ARM_AMBA
  728. select ARCH_REQUIRE_GPIOLIB
  729. select COMMON_CLKDEV
  730. select GENERIC_CLOCKEVENTS
  731. select HAVE_CLK
  732. help
  733. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  734. endchoice
  735. #
  736. # This is sorted alphabetically by mach-* pathname. However, plat-*
  737. # Kconfigs may be included either alphabetically (according to the
  738. # plat- suffix) or along side the corresponding mach-* source.
  739. #
  740. source "arch/arm/mach-aaec2000/Kconfig"
  741. source "arch/arm/mach-at91/Kconfig"
  742. source "arch/arm/mach-bcmring/Kconfig"
  743. source "arch/arm/mach-clps711x/Kconfig"
  744. source "arch/arm/mach-cns3xxx/Kconfig"
  745. source "arch/arm/mach-davinci/Kconfig"
  746. source "arch/arm/mach-dove/Kconfig"
  747. source "arch/arm/mach-ep93xx/Kconfig"
  748. source "arch/arm/mach-footbridge/Kconfig"
  749. source "arch/arm/mach-gemini/Kconfig"
  750. source "arch/arm/mach-h720x/Kconfig"
  751. source "arch/arm/mach-integrator/Kconfig"
  752. source "arch/arm/mach-iop32x/Kconfig"
  753. source "arch/arm/mach-iop33x/Kconfig"
  754. source "arch/arm/mach-iop13xx/Kconfig"
  755. source "arch/arm/mach-ixp4xx/Kconfig"
  756. source "arch/arm/mach-ixp2000/Kconfig"
  757. source "arch/arm/mach-ixp23xx/Kconfig"
  758. source "arch/arm/mach-kirkwood/Kconfig"
  759. source "arch/arm/mach-ks8695/Kconfig"
  760. source "arch/arm/mach-lh7a40x/Kconfig"
  761. source "arch/arm/mach-loki/Kconfig"
  762. source "arch/arm/mach-lpc32xx/Kconfig"
  763. source "arch/arm/mach-msm/Kconfig"
  764. source "arch/arm/mach-mv78xx0/Kconfig"
  765. source "arch/arm/plat-mxc/Kconfig"
  766. source "arch/arm/mach-netx/Kconfig"
  767. source "arch/arm/mach-nomadik/Kconfig"
  768. source "arch/arm/plat-nomadik/Kconfig"
  769. source "arch/arm/mach-ns9xxx/Kconfig"
  770. source "arch/arm/mach-nuc93x/Kconfig"
  771. source "arch/arm/plat-omap/Kconfig"
  772. source "arch/arm/mach-omap1/Kconfig"
  773. source "arch/arm/mach-omap2/Kconfig"
  774. source "arch/arm/mach-orion5x/Kconfig"
  775. source "arch/arm/mach-pxa/Kconfig"
  776. source "arch/arm/plat-pxa/Kconfig"
  777. source "arch/arm/mach-mmp/Kconfig"
  778. source "arch/arm/mach-realview/Kconfig"
  779. source "arch/arm/mach-sa1100/Kconfig"
  780. source "arch/arm/plat-samsung/Kconfig"
  781. source "arch/arm/plat-s3c24xx/Kconfig"
  782. source "arch/arm/plat-s5p/Kconfig"
  783. source "arch/arm/plat-spear/Kconfig"
  784. source "arch/arm/plat-tcc/Kconfig"
  785. if ARCH_S3C2410
  786. source "arch/arm/mach-s3c2400/Kconfig"
  787. source "arch/arm/mach-s3c2410/Kconfig"
  788. source "arch/arm/mach-s3c2412/Kconfig"
  789. source "arch/arm/mach-s3c2416/Kconfig"
  790. source "arch/arm/mach-s3c2440/Kconfig"
  791. source "arch/arm/mach-s3c2443/Kconfig"
  792. endif
  793. if ARCH_S3C64XX
  794. source "arch/arm/mach-s3c64xx/Kconfig"
  795. endif
  796. source "arch/arm/mach-s5p64x0/Kconfig"
  797. source "arch/arm/mach-s5p6442/Kconfig"
  798. source "arch/arm/mach-s5pc100/Kconfig"
  799. source "arch/arm/mach-s5pv210/Kconfig"
  800. source "arch/arm/mach-s5pv310/Kconfig"
  801. source "arch/arm/mach-shmobile/Kconfig"
  802. source "arch/arm/plat-stmp3xxx/Kconfig"
  803. source "arch/arm/mach-tegra/Kconfig"
  804. source "arch/arm/mach-u300/Kconfig"
  805. source "arch/arm/mach-ux500/Kconfig"
  806. source "arch/arm/mach-versatile/Kconfig"
  807. source "arch/arm/mach-vexpress/Kconfig"
  808. source "arch/arm/mach-w90x900/Kconfig"
  809. # Definitions to make life easier
  810. config ARCH_ACORN
  811. bool
  812. config PLAT_IOP
  813. bool
  814. select GENERIC_CLOCKEVENTS
  815. config PLAT_ORION
  816. bool
  817. config PLAT_PXA
  818. bool
  819. config PLAT_VERSATILE
  820. bool
  821. config ARM_TIMER_SP804
  822. bool
  823. source arch/arm/mm/Kconfig
  824. config IWMMXT
  825. bool "Enable iWMMXt support"
  826. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  827. default y if PXA27x || PXA3xx || ARCH_MMP
  828. help
  829. Enable support for iWMMXt context switching at run time if
  830. running on a CPU that supports it.
  831. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  832. config XSCALE_PMU
  833. bool
  834. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  835. default y
  836. config CPU_HAS_PMU
  837. depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
  838. (!ARCH_OMAP3 || OMAP3_EMU)
  839. default y
  840. bool
  841. if !MMU
  842. source "arch/arm/Kconfig-nommu"
  843. endif
  844. config ARM_ERRATA_411920
  845. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  846. depends on CPU_V6
  847. help
  848. Invalidation of the Instruction Cache operation can
  849. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  850. It does not affect the MPCore. This option enables the ARM Ltd.
  851. recommended workaround.
  852. config ARM_ERRATA_430973
  853. bool "ARM errata: Stale prediction on replaced interworking branch"
  854. depends on CPU_V7
  855. help
  856. This option enables the workaround for the 430973 Cortex-A8
  857. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  858. interworking branch is replaced with another code sequence at the
  859. same virtual address, whether due to self-modifying code or virtual
  860. to physical address re-mapping, Cortex-A8 does not recover from the
  861. stale interworking branch prediction. This results in Cortex-A8
  862. executing the new code sequence in the incorrect ARM or Thumb state.
  863. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  864. and also flushes the branch target cache at every context switch.
  865. Note that setting specific bits in the ACTLR register may not be
  866. available in non-secure mode.
  867. config ARM_ERRATA_458693
  868. bool "ARM errata: Processor deadlock when a false hazard is created"
  869. depends on CPU_V7
  870. help
  871. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  872. erratum. For very specific sequences of memory operations, it is
  873. possible for a hazard condition intended for a cache line to instead
  874. be incorrectly associated with a different cache line. This false
  875. hazard might then cause a processor deadlock. The workaround enables
  876. the L1 caching of the NEON accesses and disables the PLD instruction
  877. in the ACTLR register. Note that setting specific bits in the ACTLR
  878. register may not be available in non-secure mode.
  879. config ARM_ERRATA_460075
  880. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  881. depends on CPU_V7
  882. help
  883. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  884. erratum. Any asynchronous access to the L2 cache may encounter a
  885. situation in which recent store transactions to the L2 cache are lost
  886. and overwritten with stale memory contents from external memory. The
  887. workaround disables the write-allocate mode for the L2 cache via the
  888. ACTLR register. Note that setting specific bits in the ACTLR register
  889. may not be available in non-secure mode.
  890. config ARM_ERRATA_742230
  891. bool "ARM errata: DMB operation may be faulty"
  892. depends on CPU_V7 && SMP
  893. help
  894. This option enables the workaround for the 742230 Cortex-A9
  895. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  896. between two write operations may not ensure the correct visibility
  897. ordering of the two writes. This workaround sets a specific bit in
  898. the diagnostic register of the Cortex-A9 which causes the DMB
  899. instruction to behave as a DSB, ensuring the correct behaviour of
  900. the two writes.
  901. config ARM_ERRATA_742231
  902. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  903. depends on CPU_V7 && SMP
  904. help
  905. This option enables the workaround for the 742231 Cortex-A9
  906. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  907. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  908. accessing some data located in the same cache line, may get corrupted
  909. data due to bad handling of the address hazard when the line gets
  910. replaced from one of the CPUs at the same time as another CPU is
  911. accessing it. This workaround sets specific bits in the diagnostic
  912. register of the Cortex-A9 which reduces the linefill issuing
  913. capabilities of the processor.
  914. config PL310_ERRATA_588369
  915. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  916. depends on CACHE_L2X0 && ARCH_OMAP4
  917. help
  918. The PL310 L2 cache controller implements three types of Clean &
  919. Invalidate maintenance operations: by Physical Address
  920. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  921. They are architecturally defined to behave as the execution of a
  922. clean operation followed immediately by an invalidate operation,
  923. both performing to the same memory location. This functionality
  924. is not correctly implemented in PL310 as clean lines are not
  925. invalidated as a result of these operations. Note that this errata
  926. uses Texas Instrument's secure monitor api.
  927. config ARM_ERRATA_720789
  928. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  929. depends on CPU_V7 && SMP
  930. help
  931. This option enables the workaround for the 720789 Cortex-A9 (prior to
  932. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  933. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  934. As a consequence of this erratum, some TLB entries which should be
  935. invalidated are not, resulting in an incoherency in the system page
  936. tables. The workaround changes the TLB flushing routines to invalidate
  937. entries regardless of the ASID.
  938. config ARM_ERRATA_743622
  939. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  940. depends on CPU_V7
  941. help
  942. This option enables the workaround for the 743622 Cortex-A9
  943. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  944. optimisation in the Cortex-A9 Store Buffer may lead to data
  945. corruption. This workaround sets a specific bit in the diagnostic
  946. register of the Cortex-A9 which disables the Store Buffer
  947. optimisation, preventing the defect from occurring. This has no
  948. visible impact on the overall performance or power consumption of the
  949. processor.
  950. endmenu
  951. source "arch/arm/common/Kconfig"
  952. menu "Bus support"
  953. config ARM_AMBA
  954. bool
  955. config ISA
  956. bool
  957. help
  958. Find out whether you have ISA slots on your motherboard. ISA is the
  959. name of a bus system, i.e. the way the CPU talks to the other stuff
  960. inside your box. Other bus systems are PCI, EISA, MicroChannel
  961. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  962. newer boards don't support it. If you have ISA, say Y, otherwise N.
  963. # Select ISA DMA controller support
  964. config ISA_DMA
  965. bool
  966. select ISA_DMA_API
  967. # Select ISA DMA interface
  968. config ISA_DMA_API
  969. bool
  970. config PCI
  971. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE || ARCH_CNS3XXX
  972. help
  973. Find out whether you have a PCI motherboard. PCI is the name of a
  974. bus system, i.e. the way the CPU talks to the other stuff inside
  975. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  976. VESA. If you have PCI, say Y, otherwise N.
  977. config PCI_DOMAINS
  978. bool
  979. depends on PCI
  980. config PCI_SYSCALL
  981. def_bool PCI
  982. # Select the host bridge type
  983. config PCI_HOST_VIA82C505
  984. bool
  985. depends on PCI && ARCH_SHARK
  986. default y
  987. config PCI_HOST_ITE8152
  988. bool
  989. depends on PCI && MACH_ARMCORE
  990. default y
  991. select DMABOUNCE
  992. source "drivers/pci/Kconfig"
  993. source "drivers/pcmcia/Kconfig"
  994. endmenu
  995. menu "Kernel Features"
  996. source "kernel/time/Kconfig"
  997. config SMP
  998. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  999. depends on EXPERIMENTAL
  1000. depends on GENERIC_CLOCKEVENTS
  1001. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1002. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
  1003. ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4
  1004. select USE_GENERIC_SMP_HELPERS
  1005. select HAVE_ARM_SCU
  1006. help
  1007. This enables support for systems with more than one CPU. If you have
  1008. a system with only one CPU, like most personal computers, say N. If
  1009. you have a system with more than one CPU, say Y.
  1010. If you say N here, the kernel will run on single and multiprocessor
  1011. machines, but will use only one CPU of a multiprocessor machine. If
  1012. you say Y here, the kernel will run on many, but not all, single
  1013. processor machines. On a single processor machine, the kernel will
  1014. run faster if you say N here.
  1015. See also <file:Documentation/i386/IO-APIC.txt>,
  1016. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1017. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1018. If you don't know what to do here, say N.
  1019. config SMP_ON_UP
  1020. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1021. depends on EXPERIMENTAL
  1022. depends on SMP && !XIP && !THUMB2_KERNEL
  1023. default y
  1024. help
  1025. SMP kernels contain instructions which fail on non-SMP processors.
  1026. Enabling this option allows the kernel to modify itself to make
  1027. these instructions safe. Disabling it allows about 1K of space
  1028. savings.
  1029. If you don't know what to do here, say Y.
  1030. config HAVE_ARM_SCU
  1031. bool
  1032. depends on SMP
  1033. help
  1034. This option enables support for the ARM system coherency unit
  1035. config HAVE_ARM_TWD
  1036. bool
  1037. depends on SMP
  1038. help
  1039. This options enables support for the ARM timer and watchdog unit
  1040. choice
  1041. prompt "Memory split"
  1042. default VMSPLIT_3G
  1043. help
  1044. Select the desired split between kernel and user memory.
  1045. If you are not absolutely sure what you are doing, leave this
  1046. option alone!
  1047. config VMSPLIT_3G
  1048. bool "3G/1G user/kernel split"
  1049. config VMSPLIT_2G
  1050. bool "2G/2G user/kernel split"
  1051. config VMSPLIT_1G
  1052. bool "1G/3G user/kernel split"
  1053. endchoice
  1054. config PAGE_OFFSET
  1055. hex
  1056. default 0x40000000 if VMSPLIT_1G
  1057. default 0x80000000 if VMSPLIT_2G
  1058. default 0xC0000000
  1059. config NR_CPUS
  1060. int "Maximum number of CPUs (2-32)"
  1061. range 2 32
  1062. depends on SMP
  1063. default "4"
  1064. config HOTPLUG_CPU
  1065. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1066. depends on SMP && HOTPLUG && EXPERIMENTAL
  1067. help
  1068. Say Y here to experiment with turning CPUs off and on. CPUs
  1069. can be controlled through /sys/devices/system/cpu.
  1070. config LOCAL_TIMERS
  1071. bool "Use local timer interrupts"
  1072. depends on SMP
  1073. default y
  1074. select HAVE_ARM_TWD
  1075. help
  1076. Enable support for local timers on SMP platforms, rather then the
  1077. legacy IPI broadcast method. Local timers allows the system
  1078. accounting to be spread across the timer interval, preventing a
  1079. "thundering herd" at every timer tick.
  1080. source kernel/Kconfig.preempt
  1081. config HZ
  1082. int
  1083. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1084. ARCH_S5P6442 || ARCH_S5PV210 || ARCH_S5PV310
  1085. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1086. default AT91_TIMER_HZ if ARCH_AT91
  1087. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1088. default 100
  1089. config THUMB2_KERNEL
  1090. bool "Compile the kernel in Thumb-2 mode"
  1091. depends on CPU_V7 && EXPERIMENTAL
  1092. select AEABI
  1093. select ARM_ASM_UNIFIED
  1094. help
  1095. By enabling this option, the kernel will be compiled in
  1096. Thumb-2 mode. A compiler/assembler that understand the unified
  1097. ARM-Thumb syntax is needed.
  1098. If unsure, say N.
  1099. config ARM_ASM_UNIFIED
  1100. bool
  1101. config AEABI
  1102. bool "Use the ARM EABI to compile the kernel"
  1103. help
  1104. This option allows for the kernel to be compiled using the latest
  1105. ARM ABI (aka EABI). This is only useful if you are using a user
  1106. space environment that is also compiled with EABI.
  1107. Since there are major incompatibilities between the legacy ABI and
  1108. EABI, especially with regard to structure member alignment, this
  1109. option also changes the kernel syscall calling convention to
  1110. disambiguate both ABIs and allow for backward compatibility support
  1111. (selected with CONFIG_OABI_COMPAT).
  1112. To use this you need GCC version 4.0.0 or later.
  1113. config OABI_COMPAT
  1114. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1115. depends on AEABI && EXPERIMENTAL
  1116. default y
  1117. help
  1118. This option preserves the old syscall interface along with the
  1119. new (ARM EABI) one. It also provides a compatibility layer to
  1120. intercept syscalls that have structure arguments which layout
  1121. in memory differs between the legacy ABI and the new ARM EABI
  1122. (only for non "thumb" binaries). This option adds a tiny
  1123. overhead to all syscalls and produces a slightly larger kernel.
  1124. If you know you'll be using only pure EABI user space then you
  1125. can say N here. If this option is not selected and you attempt
  1126. to execute a legacy ABI binary then the result will be
  1127. UNPREDICTABLE (in fact it can be predicted that it won't work
  1128. at all). If in doubt say Y.
  1129. config ARCH_HAS_HOLES_MEMORYMODEL
  1130. bool
  1131. config ARCH_SPARSEMEM_ENABLE
  1132. bool
  1133. config ARCH_SPARSEMEM_DEFAULT
  1134. def_bool ARCH_SPARSEMEM_ENABLE
  1135. config ARCH_SELECT_MEMORY_MODEL
  1136. def_bool ARCH_SPARSEMEM_ENABLE
  1137. config HIGHMEM
  1138. bool "High Memory Support (EXPERIMENTAL)"
  1139. depends on MMU && EXPERIMENTAL
  1140. help
  1141. The address space of ARM processors is only 4 Gigabytes large
  1142. and it has to accommodate user address space, kernel address
  1143. space as well as some memory mapped IO. That means that, if you
  1144. have a large amount of physical memory and/or IO, not all of the
  1145. memory can be "permanently mapped" by the kernel. The physical
  1146. memory that is not permanently mapped is called "high memory".
  1147. Depending on the selected kernel/user memory split, minimum
  1148. vmalloc space and actual amount of RAM, you may not need this
  1149. option which should result in a slightly faster kernel.
  1150. If unsure, say n.
  1151. config HIGHPTE
  1152. bool "Allocate 2nd-level pagetables from highmem"
  1153. depends on HIGHMEM
  1154. depends on !OUTER_CACHE
  1155. config HW_PERF_EVENTS
  1156. bool "Enable hardware performance counter support for perf events"
  1157. depends on PERF_EVENTS && CPU_HAS_PMU
  1158. default y
  1159. help
  1160. Enable hardware performance counter support for perf events. If
  1161. disabled, perf events will use software events only.
  1162. config SPARSE_IRQ
  1163. def_bool n
  1164. help
  1165. This enables support for sparse irqs. This is useful in general
  1166. as most CPUs have a fairly sparse array of IRQ vectors, which
  1167. the irq_desc then maps directly on to. Systems with a high
  1168. number of off-chip IRQs will want to treat this as
  1169. experimental until they have been independently verified.
  1170. source "mm/Kconfig"
  1171. config FORCE_MAX_ZONEORDER
  1172. int "Maximum zone order" if ARCH_SHMOBILE
  1173. range 11 64 if ARCH_SHMOBILE
  1174. default "9" if SA1111
  1175. default "11"
  1176. help
  1177. The kernel memory allocator divides physically contiguous memory
  1178. blocks into "zones", where each zone is a power of two number of
  1179. pages. This option selects the largest power of two that the kernel
  1180. keeps in the memory allocator. If you need to allocate very large
  1181. blocks of physically contiguous memory, then you may need to
  1182. increase this value.
  1183. This config option is actually maximum order plus one. For example,
  1184. a value of 11 means that the largest free memory block is 2^10 pages.
  1185. config LEDS
  1186. bool "Timer and CPU usage LEDs"
  1187. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1188. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1189. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1190. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1191. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1192. ARCH_AT91 || ARCH_DAVINCI || \
  1193. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1194. help
  1195. If you say Y here, the LEDs on your machine will be used
  1196. to provide useful information about your current system status.
  1197. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1198. be able to select which LEDs are active using the options below. If
  1199. you are compiling a kernel for the EBSA-110 or the LART however, the
  1200. red LED will simply flash regularly to indicate that the system is
  1201. still functional. It is safe to say Y here if you have a CATS
  1202. system, but the driver will do nothing.
  1203. config LEDS_TIMER
  1204. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1205. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1206. || MACH_OMAP_PERSEUS2
  1207. depends on LEDS
  1208. depends on !GENERIC_CLOCKEVENTS
  1209. default y if ARCH_EBSA110
  1210. help
  1211. If you say Y here, one of the system LEDs (the green one on the
  1212. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1213. will flash regularly to indicate that the system is still
  1214. operational. This is mainly useful to kernel hackers who are
  1215. debugging unstable kernels.
  1216. The LART uses the same LED for both Timer LED and CPU usage LED
  1217. functions. You may choose to use both, but the Timer LED function
  1218. will overrule the CPU usage LED.
  1219. config LEDS_CPU
  1220. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1221. !ARCH_OMAP) \
  1222. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1223. || MACH_OMAP_PERSEUS2
  1224. depends on LEDS
  1225. help
  1226. If you say Y here, the red LED will be used to give a good real
  1227. time indication of CPU usage, by lighting whenever the idle task
  1228. is not currently executing.
  1229. The LART uses the same LED for both Timer LED and CPU usage LED
  1230. functions. You may choose to use both, but the Timer LED function
  1231. will overrule the CPU usage LED.
  1232. config ALIGNMENT_TRAP
  1233. bool
  1234. depends on CPU_CP15_MMU
  1235. default y if !ARCH_EBSA110
  1236. select HAVE_PROC_CPU if PROC_FS
  1237. help
  1238. ARM processors cannot fetch/store information which is not
  1239. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1240. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1241. fetch/store instructions will be emulated in software if you say
  1242. here, which has a severe performance impact. This is necessary for
  1243. correct operation of some network protocols. With an IP-only
  1244. configuration it is safe to say N, otherwise say Y.
  1245. config UACCESS_WITH_MEMCPY
  1246. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1247. depends on MMU && EXPERIMENTAL
  1248. default y if CPU_FEROCEON
  1249. help
  1250. Implement faster copy_to_user and clear_user methods for CPU
  1251. cores where a 8-word STM instruction give significantly higher
  1252. memory write throughput than a sequence of individual 32bit stores.
  1253. A possible side effect is a slight increase in scheduling latency
  1254. between threads sharing the same address space if they invoke
  1255. such copy operations with large buffers.
  1256. However, if the CPU data cache is using a write-allocate mode,
  1257. this option is unlikely to provide any performance gain.
  1258. config SECCOMP
  1259. bool
  1260. prompt "Enable seccomp to safely compute untrusted bytecode"
  1261. ---help---
  1262. This kernel feature is useful for number crunching applications
  1263. that may need to compute untrusted bytecode during their
  1264. execution. By using pipes or other transports made available to
  1265. the process as file descriptors supporting the read/write
  1266. syscalls, it's possible to isolate those applications in
  1267. their own address space using seccomp. Once seccomp is
  1268. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1269. and the task is only allowed to execute a few safe syscalls
  1270. defined by each seccomp mode.
  1271. config CC_STACKPROTECTOR
  1272. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1273. help
  1274. This option turns on the -fstack-protector GCC feature. This
  1275. feature puts, at the beginning of functions, a canary value on
  1276. the stack just before the return address, and validates
  1277. the value just before actually returning. Stack based buffer
  1278. overflows (that need to overwrite this return address) now also
  1279. overwrite the canary, which gets detected and the attack is then
  1280. neutralized via a kernel panic.
  1281. This feature requires gcc version 4.2 or above.
  1282. config DEPRECATED_PARAM_STRUCT
  1283. bool "Provide old way to pass kernel parameters"
  1284. help
  1285. This was deprecated in 2001 and announced to live on for 5 years.
  1286. Some old boot loaders still use this way.
  1287. endmenu
  1288. menu "Boot options"
  1289. # Compressed boot loader in ROM. Yes, we really want to ask about
  1290. # TEXT and BSS so we preserve their values in the config files.
  1291. config ZBOOT_ROM_TEXT
  1292. hex "Compressed ROM boot loader base address"
  1293. default "0"
  1294. help
  1295. The physical address at which the ROM-able zImage is to be
  1296. placed in the target. Platforms which normally make use of
  1297. ROM-able zImage formats normally set this to a suitable
  1298. value in their defconfig file.
  1299. If ZBOOT_ROM is not enabled, this has no effect.
  1300. config ZBOOT_ROM_BSS
  1301. hex "Compressed ROM boot loader BSS address"
  1302. default "0"
  1303. help
  1304. The base address of an area of read/write memory in the target
  1305. for the ROM-able zImage which must be available while the
  1306. decompressor is running. It must be large enough to hold the
  1307. entire decompressed kernel plus an additional 128 KiB.
  1308. Platforms which normally make use of ROM-able zImage formats
  1309. normally set this to a suitable value in their defconfig file.
  1310. If ZBOOT_ROM is not enabled, this has no effect.
  1311. config ZBOOT_ROM
  1312. bool "Compressed boot loader in ROM/flash"
  1313. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1314. help
  1315. Say Y here if you intend to execute your compressed kernel image
  1316. (zImage) directly from ROM or flash. If unsure, say N.
  1317. config CMDLINE
  1318. string "Default kernel command string"
  1319. default ""
  1320. help
  1321. On some architectures (EBSA110 and CATS), there is currently no way
  1322. for the boot loader to pass arguments to the kernel. For these
  1323. architectures, you should supply some command-line options at build
  1324. time by entering them here. As a minimum, you should specify the
  1325. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1326. config CMDLINE_FORCE
  1327. bool "Always use the default kernel command string"
  1328. depends on CMDLINE != ""
  1329. help
  1330. Always use the default kernel command string, even if the boot
  1331. loader passes other arguments to the kernel.
  1332. This is useful if you cannot or don't want to change the
  1333. command-line options your boot loader passes to the kernel.
  1334. If unsure, say N.
  1335. config XIP_KERNEL
  1336. bool "Kernel Execute-In-Place from ROM"
  1337. depends on !ZBOOT_ROM
  1338. help
  1339. Execute-In-Place allows the kernel to run from non-volatile storage
  1340. directly addressable by the CPU, such as NOR flash. This saves RAM
  1341. space since the text section of the kernel is not loaded from flash
  1342. to RAM. Read-write sections, such as the data section and stack,
  1343. are still copied to RAM. The XIP kernel is not compressed since
  1344. it has to run directly from flash, so it will take more space to
  1345. store it. The flash address used to link the kernel object files,
  1346. and for storing it, is configuration dependent. Therefore, if you
  1347. say Y here, you must know the proper physical address where to
  1348. store the kernel image depending on your own flash memory usage.
  1349. Also note that the make target becomes "make xipImage" rather than
  1350. "make zImage" or "make Image". The final kernel binary to put in
  1351. ROM memory will be arch/arm/boot/xipImage.
  1352. If unsure, say N.
  1353. config XIP_PHYS_ADDR
  1354. hex "XIP Kernel Physical Location"
  1355. depends on XIP_KERNEL
  1356. default "0x00080000"
  1357. help
  1358. This is the physical address in your flash memory the kernel will
  1359. be linked for and stored to. This address is dependent on your
  1360. own flash usage.
  1361. config KEXEC
  1362. bool "Kexec system call (EXPERIMENTAL)"
  1363. depends on EXPERIMENTAL
  1364. help
  1365. kexec is a system call that implements the ability to shutdown your
  1366. current kernel, and to start another kernel. It is like a reboot
  1367. but it is independent of the system firmware. And like a reboot
  1368. you can start any kernel with it, not just Linux.
  1369. It is an ongoing process to be certain the hardware in a machine
  1370. is properly shutdown, so do not be surprised if this code does not
  1371. initially work for you. It may help to enable device hotplugging
  1372. support.
  1373. config ATAGS_PROC
  1374. bool "Export atags in procfs"
  1375. depends on KEXEC
  1376. default y
  1377. help
  1378. Should the atags used to boot the kernel be exported in an "atags"
  1379. file in procfs. Useful with kexec.
  1380. config AUTO_ZRELADDR
  1381. bool "Auto calculation of the decompressed kernel image address"
  1382. depends on !ZBOOT_ROM && !ARCH_U300
  1383. help
  1384. ZRELADDR is the physical address where the decompressed kernel
  1385. image will be placed. If AUTO_ZRELADDR is selected, the address
  1386. will be determined at run-time by masking the current IP with
  1387. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1388. from start of memory.
  1389. endmenu
  1390. menu "CPU Power Management"
  1391. if ARCH_HAS_CPUFREQ
  1392. source "drivers/cpufreq/Kconfig"
  1393. config CPU_FREQ_SA1100
  1394. bool
  1395. config CPU_FREQ_SA1110
  1396. bool
  1397. config CPU_FREQ_INTEGRATOR
  1398. tristate "CPUfreq driver for ARM Integrator CPUs"
  1399. depends on ARCH_INTEGRATOR && CPU_FREQ
  1400. default y
  1401. help
  1402. This enables the CPUfreq driver for ARM Integrator CPUs.
  1403. For details, take a look at <file:Documentation/cpu-freq>.
  1404. If in doubt, say Y.
  1405. config CPU_FREQ_PXA
  1406. bool
  1407. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1408. default y
  1409. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1410. config CPU_FREQ_S3C64XX
  1411. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1412. depends on CPU_FREQ && CPU_S3C6410
  1413. config CPU_FREQ_S3C
  1414. bool
  1415. help
  1416. Internal configuration node for common cpufreq on Samsung SoC
  1417. config CPU_FREQ_S3C24XX
  1418. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1419. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1420. select CPU_FREQ_S3C
  1421. help
  1422. This enables the CPUfreq driver for the Samsung S3C24XX family
  1423. of CPUs.
  1424. For details, take a look at <file:Documentation/cpu-freq>.
  1425. If in doubt, say N.
  1426. config CPU_FREQ_S3C24XX_PLL
  1427. bool "Support CPUfreq changing of PLL frequency"
  1428. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1429. help
  1430. Compile in support for changing the PLL frequency from the
  1431. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1432. after a frequency change, so by default it is not enabled.
  1433. This also means that the PLL tables for the selected CPU(s) will
  1434. be built which may increase the size of the kernel image.
  1435. config CPU_FREQ_S3C24XX_DEBUG
  1436. bool "Debug CPUfreq Samsung driver core"
  1437. depends on CPU_FREQ_S3C24XX
  1438. help
  1439. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1440. config CPU_FREQ_S3C24XX_IODEBUG
  1441. bool "Debug CPUfreq Samsung driver IO timing"
  1442. depends on CPU_FREQ_S3C24XX
  1443. help
  1444. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1445. config CPU_FREQ_S3C24XX_DEBUGFS
  1446. bool "Export debugfs for CPUFreq"
  1447. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1448. help
  1449. Export status information via debugfs.
  1450. endif
  1451. source "drivers/cpuidle/Kconfig"
  1452. endmenu
  1453. menu "Floating point emulation"
  1454. comment "At least one emulation must be selected"
  1455. config FPE_NWFPE
  1456. bool "NWFPE math emulation"
  1457. depends on !AEABI || OABI_COMPAT
  1458. ---help---
  1459. Say Y to include the NWFPE floating point emulator in the kernel.
  1460. This is necessary to run most binaries. Linux does not currently
  1461. support floating point hardware so you need to say Y here even if
  1462. your machine has an FPA or floating point co-processor podule.
  1463. You may say N here if you are going to load the Acorn FPEmulator
  1464. early in the bootup.
  1465. config FPE_NWFPE_XP
  1466. bool "Support extended precision"
  1467. depends on FPE_NWFPE
  1468. help
  1469. Say Y to include 80-bit support in the kernel floating-point
  1470. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1471. Note that gcc does not generate 80-bit operations by default,
  1472. so in most cases this option only enlarges the size of the
  1473. floating point emulator without any good reason.
  1474. You almost surely want to say N here.
  1475. config FPE_FASTFPE
  1476. bool "FastFPE math emulation (EXPERIMENTAL)"
  1477. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1478. ---help---
  1479. Say Y here to include the FAST floating point emulator in the kernel.
  1480. This is an experimental much faster emulator which now also has full
  1481. precision for the mantissa. It does not support any exceptions.
  1482. It is very simple, and approximately 3-6 times faster than NWFPE.
  1483. It should be sufficient for most programs. It may be not suitable
  1484. for scientific calculations, but you have to check this for yourself.
  1485. If you do not feel you need a faster FP emulation you should better
  1486. choose NWFPE.
  1487. config VFP
  1488. bool "VFP-format floating point maths"
  1489. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1490. help
  1491. Say Y to include VFP support code in the kernel. This is needed
  1492. if your hardware includes a VFP unit.
  1493. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1494. release notes and additional status information.
  1495. Say N if your target does not have VFP hardware.
  1496. config VFPv3
  1497. bool
  1498. depends on VFP
  1499. default y if CPU_V7
  1500. config NEON
  1501. bool "Advanced SIMD (NEON) Extension support"
  1502. depends on VFPv3 && CPU_V7
  1503. help
  1504. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1505. Extension.
  1506. endmenu
  1507. menu "Userspace binary formats"
  1508. source "fs/Kconfig.binfmt"
  1509. config ARTHUR
  1510. tristate "RISC OS personality"
  1511. depends on !AEABI
  1512. help
  1513. Say Y here to include the kernel code necessary if you want to run
  1514. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1515. experimental; if this sounds frightening, say N and sleep in peace.
  1516. You can also say M here to compile this support as a module (which
  1517. will be called arthur).
  1518. endmenu
  1519. menu "Power management options"
  1520. source "kernel/power/Kconfig"
  1521. config ARCH_SUSPEND_POSSIBLE
  1522. def_bool y
  1523. endmenu
  1524. source "net/Kconfig"
  1525. source "drivers/Kconfig"
  1526. source "fs/Kconfig"
  1527. source "arch/arm/Kconfig.debug"
  1528. source "security/Kconfig"
  1529. source "crypto/Kconfig"
  1530. source "lib/Kconfig"