Kconfig 30 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_IDE
  10. select RTC_LIB
  11. select SYS_SUPPORTS_APM_EMULATION
  12. select HAVE_OPROFILE
  13. select HAVE_KPROBES if (!XIP_KERNEL)
  14. select HAVE_KRETPROBES if (HAVE_KPROBES)
  15. select HAVE_FTRACE if (!XIP_KERNEL)
  16. select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
  17. help
  18. The ARM series is a line of low-power-consumption RISC chip designs
  19. licensed by ARM Ltd and targeted at embedded applications and
  20. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  21. manufactured, but legacy ARM-based PC hardware remains popular in
  22. Europe. There is an ARM Linux project with a web page at
  23. <http://www.arm.linux.org.uk/>.
  24. config HAVE_PWM
  25. bool
  26. config SYS_SUPPORTS_APM_EMULATION
  27. bool
  28. config GENERIC_GPIO
  29. bool
  30. default n
  31. config GENERIC_TIME
  32. bool
  33. default n
  34. config GENERIC_CLOCKEVENTS
  35. bool
  36. default n
  37. config GENERIC_CLOCKEVENTS_BROADCAST
  38. bool
  39. depends on GENERIC_CLOCKEVENTS
  40. default y if SMP && !LOCAL_TIMERS
  41. config MMU
  42. bool
  43. default y
  44. config NO_IOPORT
  45. bool
  46. default n
  47. config EISA
  48. bool
  49. ---help---
  50. The Extended Industry Standard Architecture (EISA) bus was
  51. developed as an open alternative to the IBM MicroChannel bus.
  52. The EISA bus provided some of the features of the IBM MicroChannel
  53. bus while maintaining backward compatibility with cards made for
  54. the older ISA bus. The EISA bus saw limited use between 1988 and
  55. 1995 when it was made obsolete by the PCI bus.
  56. Say Y here if you are building a kernel for an EISA-based machine.
  57. Otherwise, say N.
  58. config SBUS
  59. bool
  60. config MCA
  61. bool
  62. help
  63. MicroChannel Architecture is found in some IBM PS/2 machines and
  64. laptops. It is a bus system similar to PCI or ISA. See
  65. <file:Documentation/mca.txt> (and especially the web page given
  66. there) before attempting to build an MCA bus kernel.
  67. config GENERIC_HARDIRQS
  68. bool
  69. default y
  70. config STACKTRACE_SUPPORT
  71. bool
  72. default y
  73. config HAVE_LATENCYTOP_SUPPORT
  74. bool
  75. depends on !SMP
  76. default y
  77. config LOCKDEP_SUPPORT
  78. bool
  79. default y
  80. config TRACE_IRQFLAGS_SUPPORT
  81. bool
  82. default y
  83. config HARDIRQS_SW_RESEND
  84. bool
  85. default y
  86. config GENERIC_IRQ_PROBE
  87. bool
  88. default y
  89. config GENERIC_LOCKBREAK
  90. bool
  91. default y
  92. depends on SMP && PREEMPT
  93. config RWSEM_GENERIC_SPINLOCK
  94. bool
  95. default y
  96. config RWSEM_XCHGADD_ALGORITHM
  97. bool
  98. config ARCH_HAS_ILOG2_U32
  99. bool
  100. default n
  101. config ARCH_HAS_ILOG2_U64
  102. bool
  103. default n
  104. config GENERIC_HWEIGHT
  105. bool
  106. default y
  107. config GENERIC_CALIBRATE_DELAY
  108. bool
  109. default y
  110. config ARCH_SUPPORTS_AOUT
  111. def_bool y
  112. config ARCH_MAY_HAVE_PC_FDC
  113. bool
  114. config ZONE_DMA
  115. bool
  116. default y
  117. config GENERIC_ISA_DMA
  118. bool
  119. config FIQ
  120. bool
  121. config ARCH_MTD_XIP
  122. bool
  123. config GENERIC_HARDIRQS_NO__DO_IRQ
  124. bool
  125. def_bool y
  126. if OPROFILE
  127. config OPROFILE_ARMV6
  128. def_bool y
  129. depends on CPU_V6 && !SMP
  130. select OPROFILE_ARM11_CORE
  131. config OPROFILE_MPCORE
  132. def_bool y
  133. depends on CPU_V6 && SMP
  134. select OPROFILE_ARM11_CORE
  135. config OPROFILE_ARM11_CORE
  136. bool
  137. endif
  138. config VECTORS_BASE
  139. hex
  140. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  141. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  142. default 0x00000000
  143. help
  144. The base address of exception vectors.
  145. source "init/Kconfig"
  146. menu "System Type"
  147. choice
  148. prompt "ARM system type"
  149. default ARCH_VERSATILE
  150. config ARCH_AAEC2000
  151. bool "Agilent AAEC-2000 based"
  152. select ARM_AMBA
  153. help
  154. This enables support for systems based on the Agilent AAEC-2000
  155. config ARCH_INTEGRATOR
  156. bool "ARM Ltd. Integrator family"
  157. select ARM_AMBA
  158. select ICST525
  159. help
  160. Support for ARM's Integrator platform.
  161. config ARCH_REALVIEW
  162. bool "ARM Ltd. RealView family"
  163. select ARM_AMBA
  164. select ICST307
  165. select GENERIC_TIME
  166. select GENERIC_CLOCKEVENTS
  167. help
  168. This enables support for ARM Ltd RealView boards.
  169. config ARCH_VERSATILE
  170. bool "ARM Ltd. Versatile family"
  171. select ARM_AMBA
  172. select ARM_VIC
  173. select ICST307
  174. select GENERIC_TIME
  175. select GENERIC_CLOCKEVENTS
  176. help
  177. This enables support for ARM Ltd Versatile board.
  178. config ARCH_AT91
  179. bool "Atmel AT91"
  180. select GENERIC_GPIO
  181. help
  182. This enables support for systems based on the Atmel AT91RM9200,
  183. AT91SAM9 and AT91CAP9 processors.
  184. config ARCH_CLPS7500
  185. bool "Cirrus CL-PS7500FE"
  186. select TIMER_ACORN
  187. select ISA
  188. select NO_IOPORT
  189. help
  190. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  191. config ARCH_CLPS711X
  192. bool "Cirrus Logic CLPS711x/EP721x-based"
  193. help
  194. Support for Cirrus Logic 711x/721x based boards.
  195. config ARCH_EBSA110
  196. bool "EBSA-110"
  197. select ISA
  198. select NO_IOPORT
  199. help
  200. This is an evaluation board for the StrongARM processor available
  201. from Digital. It has limited hardware on-board, including an
  202. Ethernet interface, two PCMCIA sockets, two serial ports and a
  203. parallel port.
  204. config ARCH_EP93XX
  205. bool "EP93xx-based"
  206. select ARM_AMBA
  207. select ARM_VIC
  208. select GENERIC_GPIO
  209. select HAVE_GPIO_LIB
  210. help
  211. This enables support for the Cirrus EP93xx series of CPUs.
  212. config ARCH_FOOTBRIDGE
  213. bool "FootBridge"
  214. select FOOTBRIDGE
  215. help
  216. Support for systems based on the DC21285 companion chip
  217. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  218. config ARCH_NETX
  219. bool "Hilscher NetX based"
  220. select ARM_VIC
  221. help
  222. This enables support for systems based on the Hilscher NetX Soc
  223. config ARCH_H720X
  224. bool "Hynix HMS720x-based"
  225. select ISA_DMA_API
  226. help
  227. This enables support for systems based on the Hynix HMS720x
  228. config ARCH_IMX
  229. bool "IMX"
  230. select GENERIC_GPIO
  231. select GENERIC_TIME
  232. select GENERIC_CLOCKEVENTS
  233. help
  234. Support for Motorola's i.MX family of processors (MX1, MXL).
  235. config ARCH_IOP13XX
  236. bool "IOP13xx-based"
  237. depends on MMU
  238. select PLAT_IOP
  239. select PCI
  240. select ARCH_SUPPORTS_MSI
  241. help
  242. Support for Intel's IOP13XX (XScale) family of processors.
  243. config ARCH_IOP32X
  244. bool "IOP32x-based"
  245. depends on MMU
  246. select PLAT_IOP
  247. select PCI
  248. select GENERIC_GPIO
  249. select HAVE_GPIO_LIB
  250. help
  251. Support for Intel's 80219 and IOP32X (XScale) family of
  252. processors.
  253. config ARCH_IOP33X
  254. bool "IOP33x-based"
  255. depends on MMU
  256. select PLAT_IOP
  257. select PCI
  258. select GENERIC_GPIO
  259. select HAVE_GPIO_LIB
  260. help
  261. Support for Intel's IOP33X (XScale) family of processors.
  262. config ARCH_IXP23XX
  263. bool "IXP23XX-based"
  264. depends on MMU
  265. select PCI
  266. help
  267. Support for Intel's IXP23xx (XScale) family of processors.
  268. config ARCH_IXP2000
  269. bool "IXP2400/2800-based"
  270. depends on MMU
  271. select PCI
  272. help
  273. Support for Intel's IXP2400/2800 (XScale) family of processors.
  274. config ARCH_IXP4XX
  275. bool "IXP4xx-based"
  276. depends on MMU
  277. select GENERIC_GPIO
  278. select GENERIC_TIME
  279. select GENERIC_CLOCKEVENTS
  280. help
  281. Support for Intel's IXP4XX (XScale) family of processors.
  282. config ARCH_L7200
  283. bool "LinkUp-L7200"
  284. select FIQ
  285. help
  286. Say Y here if you intend to run this kernel on a LinkUp Systems
  287. L7200 Software Development Board which uses an ARM720T processor.
  288. Information on this board can be obtained at:
  289. <http://www.linkupsys.com/>
  290. If you have any questions or comments about the Linux kernel port
  291. to this board, send e-mail to <sjhill@cotw.com>.
  292. config ARCH_KIRKWOOD
  293. bool "Marvell Kirkwood"
  294. select PCI
  295. select GENERIC_TIME
  296. select GENERIC_CLOCKEVENTS
  297. select PLAT_ORION
  298. help
  299. Support for the following Marvell Kirkwood series SoCs:
  300. 88F6180, 88F6192 and 88F6281.
  301. config ARCH_KS8695
  302. bool "Micrel/Kendin KS8695"
  303. select GENERIC_GPIO
  304. help
  305. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  306. System-on-Chip devices.
  307. config ARCH_NS9XXX
  308. bool "NetSilicon NS9xxx"
  309. select GENERIC_GPIO
  310. select GENERIC_TIME
  311. select GENERIC_CLOCKEVENTS
  312. help
  313. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  314. System.
  315. <http://www.digi.com/products/microprocessors/index.jsp>
  316. config ARCH_LOKI
  317. bool "Marvell Loki (88RC8480)"
  318. select GENERIC_TIME
  319. select GENERIC_CLOCKEVENTS
  320. select PLAT_ORION
  321. help
  322. Support for the Marvell Loki (88RC8480) SoC.
  323. config ARCH_MV78XX0
  324. bool "Marvell MV78xx0"
  325. select PCI
  326. select GENERIC_TIME
  327. select GENERIC_CLOCKEVENTS
  328. select PLAT_ORION
  329. help
  330. Support for the following Marvell MV78xx0 series SoCs:
  331. MV781x0, MV782x0.
  332. config ARCH_MXC
  333. bool "Freescale MXC/iMX-based"
  334. select GENERIC_TIME
  335. select GENERIC_CLOCKEVENTS
  336. select ARCH_MTD_XIP
  337. select GENERIC_GPIO
  338. select HAVE_GPIO_LIB
  339. help
  340. Support for Freescale MXC/iMX-based family of processors
  341. config ARCH_ORION5X
  342. bool "Marvell Orion"
  343. depends on MMU
  344. select PCI
  345. select GENERIC_GPIO
  346. select GENERIC_TIME
  347. select GENERIC_CLOCKEVENTS
  348. select PLAT_ORION
  349. help
  350. Support for the following Marvell Orion 5x series SoCs:
  351. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  352. Orion-2 (5281).
  353. config ARCH_PNX4008
  354. bool "Philips Nexperia PNX4008 Mobile"
  355. help
  356. This enables support for Philips PNX4008 mobile platform.
  357. config ARCH_PXA
  358. bool "PXA2xx/PXA3xx-based"
  359. depends on MMU
  360. select ARCH_MTD_XIP
  361. select GENERIC_GPIO
  362. select HAVE_GPIO_LIB
  363. select GENERIC_TIME
  364. select GENERIC_CLOCKEVENTS
  365. select TICK_ONESHOT
  366. help
  367. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  368. config ARCH_RPC
  369. bool "RiscPC"
  370. select ARCH_ACORN
  371. select FIQ
  372. select TIMER_ACORN
  373. select ARCH_MAY_HAVE_PC_FDC
  374. select HAVE_PATA_PLATFORM
  375. select ISA_DMA_API
  376. select NO_IOPORT
  377. help
  378. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  379. CD-ROM interface, serial and parallel port, and the floppy drive.
  380. config ARCH_SA1100
  381. bool "SA1100-based"
  382. select ISA
  383. select ARCH_DISCONTIGMEM_ENABLE
  384. select ARCH_SPARSEMEM_ENABLE
  385. select ARCH_SELECT_MEMORY_MODEL
  386. select ARCH_MTD_XIP
  387. select GENERIC_GPIO
  388. select GENERIC_TIME
  389. select GENERIC_CLOCKEVENTS
  390. select TICK_ONESHOT
  391. select HAVE_GPIO_LIB
  392. help
  393. Support for StrongARM 11x0 based boards.
  394. config ARCH_S3C2410
  395. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  396. select GENERIC_GPIO
  397. help
  398. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  399. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  400. the Samsung SMDK2410 development board (and derivatives).
  401. config ARCH_SHARK
  402. bool "Shark"
  403. select ISA
  404. select ISA_DMA
  405. select PCI
  406. help
  407. Support for the StrongARM based Digital DNARD machine, also known
  408. as "Shark" (<http://www.shark-linux.de/shark.html>).
  409. config ARCH_LH7A40X
  410. bool "Sharp LH7A40X"
  411. help
  412. Say Y here for systems based on one of the Sharp LH7A40X
  413. System on a Chip processors. These CPUs include an ARM922T
  414. core with a wide array of integrated devices for
  415. hand-held and low-power applications.
  416. config ARCH_DAVINCI
  417. bool "TI DaVinci"
  418. select GENERIC_TIME
  419. select GENERIC_CLOCKEVENTS
  420. select GENERIC_GPIO
  421. help
  422. Support for TI's DaVinci platform.
  423. config ARCH_OMAP
  424. bool "TI OMAP"
  425. select GENERIC_GPIO
  426. select HAVE_GPIO_LIB
  427. select GENERIC_TIME
  428. select GENERIC_CLOCKEVENTS
  429. help
  430. Support for TI's OMAP platform (OMAP1 and OMAP2).
  431. config ARCH_MSM7X00A
  432. bool "Qualcomm MSM7X00A"
  433. select GENERIC_TIME
  434. select GENERIC_CLOCKEVENTS
  435. help
  436. Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
  437. apps processor of the MSM7X00A and depends on a shared memory
  438. interface to the ARM9 modem processor which runs the baseband stack
  439. and controls some vital subsystems (clock and power control, etc).
  440. <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
  441. endchoice
  442. source "arch/arm/mach-clps711x/Kconfig"
  443. source "arch/arm/mach-ep93xx/Kconfig"
  444. source "arch/arm/mach-footbridge/Kconfig"
  445. source "arch/arm/mach-integrator/Kconfig"
  446. source "arch/arm/mach-iop32x/Kconfig"
  447. source "arch/arm/mach-iop33x/Kconfig"
  448. source "arch/arm/mach-iop13xx/Kconfig"
  449. source "arch/arm/mach-ixp4xx/Kconfig"
  450. source "arch/arm/mach-ixp2000/Kconfig"
  451. source "arch/arm/mach-ixp23xx/Kconfig"
  452. source "arch/arm/mach-loki/Kconfig"
  453. source "arch/arm/mach-mv78xx0/Kconfig"
  454. source "arch/arm/mach-pxa/Kconfig"
  455. source "arch/arm/mach-sa1100/Kconfig"
  456. source "arch/arm/plat-omap/Kconfig"
  457. source "arch/arm/mach-omap1/Kconfig"
  458. source "arch/arm/mach-omap2/Kconfig"
  459. source "arch/arm/mach-orion5x/Kconfig"
  460. source "arch/arm/mach-kirkwood/Kconfig"
  461. source "arch/arm/plat-s3c24xx/Kconfig"
  462. source "arch/arm/plat-s3c/Kconfig"
  463. if ARCH_S3C2410
  464. source "arch/arm/mach-s3c2400/Kconfig"
  465. source "arch/arm/mach-s3c2410/Kconfig"
  466. source "arch/arm/mach-s3c2412/Kconfig"
  467. source "arch/arm/mach-s3c2440/Kconfig"
  468. source "arch/arm/mach-s3c2442/Kconfig"
  469. source "arch/arm/mach-s3c2443/Kconfig"
  470. endif
  471. source "arch/arm/mach-lh7a40x/Kconfig"
  472. source "arch/arm/mach-imx/Kconfig"
  473. source "arch/arm/mach-h720x/Kconfig"
  474. source "arch/arm/mach-versatile/Kconfig"
  475. source "arch/arm/mach-aaec2000/Kconfig"
  476. source "arch/arm/mach-realview/Kconfig"
  477. source "arch/arm/mach-at91/Kconfig"
  478. source "arch/arm/plat-mxc/Kconfig"
  479. source "arch/arm/mach-netx/Kconfig"
  480. source "arch/arm/mach-ns9xxx/Kconfig"
  481. source "arch/arm/mach-davinci/Kconfig"
  482. source "arch/arm/mach-ks8695/Kconfig"
  483. source "arch/arm/mach-msm/Kconfig"
  484. # Definitions to make life easier
  485. config ARCH_ACORN
  486. bool
  487. config PLAT_IOP
  488. bool
  489. config PLAT_ORION
  490. bool
  491. source arch/arm/mm/Kconfig
  492. config IWMMXT
  493. bool "Enable iWMMXt support"
  494. depends on CPU_XSCALE || CPU_XSC3
  495. default y if PXA27x || PXA3xx
  496. help
  497. Enable support for iWMMXt context switching at run time if
  498. running on a CPU that supports it.
  499. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  500. config XSCALE_PMU
  501. bool
  502. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  503. default y
  504. if !MMU
  505. source "arch/arm/Kconfig-nommu"
  506. endif
  507. endmenu
  508. source "arch/arm/common/Kconfig"
  509. config FORCE_MAX_ZONEORDER
  510. int
  511. depends on SA1111
  512. default "9"
  513. menu "Bus support"
  514. config ARM_AMBA
  515. bool
  516. config ISA
  517. bool
  518. help
  519. Find out whether you have ISA slots on your motherboard. ISA is the
  520. name of a bus system, i.e. the way the CPU talks to the other stuff
  521. inside your box. Other bus systems are PCI, EISA, MicroChannel
  522. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  523. newer boards don't support it. If you have ISA, say Y, otherwise N.
  524. # Select ISA DMA controller support
  525. config ISA_DMA
  526. bool
  527. select ISA_DMA_API
  528. # Select ISA DMA interface
  529. config ISA_DMA_API
  530. bool
  531. config PCI
  532. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  533. help
  534. Find out whether you have a PCI motherboard. PCI is the name of a
  535. bus system, i.e. the way the CPU talks to the other stuff inside
  536. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  537. VESA. If you have PCI, say Y, otherwise N.
  538. config PCI_SYSCALL
  539. def_bool PCI
  540. # Select the host bridge type
  541. config PCI_HOST_VIA82C505
  542. bool
  543. depends on PCI && ARCH_SHARK
  544. default y
  545. config PCI_HOST_ITE8152
  546. bool
  547. depends on PCI && MACH_ARMCORE
  548. default y
  549. select DMABOUNCE
  550. source "drivers/pci/Kconfig"
  551. source "drivers/pcmcia/Kconfig"
  552. endmenu
  553. menu "Kernel Features"
  554. source "kernel/time/Kconfig"
  555. config SMP
  556. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  557. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  558. select USE_GENERIC_SMP_HELPERS
  559. help
  560. This enables support for systems with more than one CPU. If you have
  561. a system with only one CPU, like most personal computers, say N. If
  562. you have a system with more than one CPU, say Y.
  563. If you say N here, the kernel will run on single and multiprocessor
  564. machines, but will use only one CPU of a multiprocessor machine. If
  565. you say Y here, the kernel will run on many, but not all, single
  566. processor machines. On a single processor machine, the kernel will
  567. run faster if you say N here.
  568. See also <file:Documentation/i386/IO-APIC.txt>,
  569. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  570. <http://www.linuxdoc.org/docs.html#howto>.
  571. If you don't know what to do here, say N.
  572. config NR_CPUS
  573. int "Maximum number of CPUs (2-32)"
  574. range 2 32
  575. depends on SMP
  576. default "4"
  577. config HOTPLUG_CPU
  578. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  579. depends on SMP && HOTPLUG && EXPERIMENTAL
  580. help
  581. Say Y here to experiment with turning CPUs off and on. CPUs
  582. can be controlled through /sys/devices/system/cpu.
  583. config LOCAL_TIMERS
  584. bool "Use local timer interrupts"
  585. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  586. default y
  587. help
  588. Enable support for local timers on SMP platforms, rather then the
  589. legacy IPI broadcast method. Local timers allows the system
  590. accounting to be spread across the timer interval, preventing a
  591. "thundering herd" at every timer tick.
  592. config PREEMPT
  593. bool "Preemptible Kernel (EXPERIMENTAL)"
  594. depends on EXPERIMENTAL
  595. help
  596. This option reduces the latency of the kernel when reacting to
  597. real-time or interactive events by allowing a low priority process to
  598. be preempted even if it is in kernel mode executing a system call.
  599. This allows applications to run more reliably even when the system is
  600. under load.
  601. Say Y here if you are building a kernel for a desktop, embedded
  602. or real-time system. Say N if you are unsure.
  603. config HZ
  604. int
  605. default 128 if ARCH_L7200
  606. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  607. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  608. default AT91_TIMER_HZ if ARCH_AT91
  609. default 100
  610. config AEABI
  611. bool "Use the ARM EABI to compile the kernel"
  612. help
  613. This option allows for the kernel to be compiled using the latest
  614. ARM ABI (aka EABI). This is only useful if you are using a user
  615. space environment that is also compiled with EABI.
  616. Since there are major incompatibilities between the legacy ABI and
  617. EABI, especially with regard to structure member alignment, this
  618. option also changes the kernel syscall calling convention to
  619. disambiguate both ABIs and allow for backward compatibility support
  620. (selected with CONFIG_OABI_COMPAT).
  621. To use this you need GCC version 4.0.0 or later.
  622. config OABI_COMPAT
  623. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  624. depends on AEABI && EXPERIMENTAL
  625. default y
  626. help
  627. This option preserves the old syscall interface along with the
  628. new (ARM EABI) one. It also provides a compatibility layer to
  629. intercept syscalls that have structure arguments which layout
  630. in memory differs between the legacy ABI and the new ARM EABI
  631. (only for non "thumb" binaries). This option adds a tiny
  632. overhead to all syscalls and produces a slightly larger kernel.
  633. If you know you'll be using only pure EABI user space then you
  634. can say N here. If this option is not selected and you attempt
  635. to execute a legacy ABI binary then the result will be
  636. UNPREDICTABLE (in fact it can be predicted that it won't work
  637. at all). If in doubt say Y.
  638. config ARCH_DISCONTIGMEM_ENABLE
  639. bool
  640. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  641. help
  642. Say Y to support efficient handling of discontiguous physical memory,
  643. for architectures which are either NUMA (Non-Uniform Memory Access)
  644. or have huge holes in the physical address space for other reasons.
  645. See <file:Documentation/vm/numa> for more.
  646. config ARCH_SPARSEMEM_ENABLE
  647. bool
  648. config ARCH_SELECT_MEMORY_MODEL
  649. bool
  650. config NODES_SHIFT
  651. int
  652. default "4" if ARCH_LH7A40X
  653. default "2"
  654. depends on NEED_MULTIPLE_NODES
  655. source "mm/Kconfig"
  656. config LEDS
  657. bool "Timer and CPU usage LEDs"
  658. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  659. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  660. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  661. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  662. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  663. ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
  664. ARCH_KS8695 || MACH_RD88F5182
  665. help
  666. If you say Y here, the LEDs on your machine will be used
  667. to provide useful information about your current system status.
  668. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  669. be able to select which LEDs are active using the options below. If
  670. you are compiling a kernel for the EBSA-110 or the LART however, the
  671. red LED will simply flash regularly to indicate that the system is
  672. still functional. It is safe to say Y here if you have a CATS
  673. system, but the driver will do nothing.
  674. config LEDS_TIMER
  675. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  676. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  677. || MACH_OMAP_PERSEUS2
  678. depends on LEDS
  679. depends on !GENERIC_CLOCKEVENTS
  680. default y if ARCH_EBSA110
  681. help
  682. If you say Y here, one of the system LEDs (the green one on the
  683. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  684. will flash regularly to indicate that the system is still
  685. operational. This is mainly useful to kernel hackers who are
  686. debugging unstable kernels.
  687. The LART uses the same LED for both Timer LED and CPU usage LED
  688. functions. You may choose to use both, but the Timer LED function
  689. will overrule the CPU usage LED.
  690. config LEDS_CPU
  691. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  692. !ARCH_OMAP) \
  693. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  694. || MACH_OMAP_PERSEUS2
  695. depends on LEDS
  696. help
  697. If you say Y here, the red LED will be used to give a good real
  698. time indication of CPU usage, by lighting whenever the idle task
  699. is not currently executing.
  700. The LART uses the same LED for both Timer LED and CPU usage LED
  701. functions. You may choose to use both, but the Timer LED function
  702. will overrule the CPU usage LED.
  703. config ALIGNMENT_TRAP
  704. bool
  705. depends on CPU_CP15_MMU
  706. default y if !ARCH_EBSA110
  707. help
  708. ARM processors cannot fetch/store information which is not
  709. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  710. address divisible by 4. On 32-bit ARM processors, these non-aligned
  711. fetch/store instructions will be emulated in software if you say
  712. here, which has a severe performance impact. This is necessary for
  713. correct operation of some network protocols. With an IP-only
  714. configuration it is safe to say N, otherwise say Y.
  715. endmenu
  716. menu "Boot options"
  717. # Compressed boot loader in ROM. Yes, we really want to ask about
  718. # TEXT and BSS so we preserve their values in the config files.
  719. config ZBOOT_ROM_TEXT
  720. hex "Compressed ROM boot loader base address"
  721. default "0"
  722. help
  723. The physical address at which the ROM-able zImage is to be
  724. placed in the target. Platforms which normally make use of
  725. ROM-able zImage formats normally set this to a suitable
  726. value in their defconfig file.
  727. If ZBOOT_ROM is not enabled, this has no effect.
  728. config ZBOOT_ROM_BSS
  729. hex "Compressed ROM boot loader BSS address"
  730. default "0"
  731. help
  732. The base address of an area of read/write memory in the target
  733. for the ROM-able zImage which must be available while the
  734. decompressor is running. It must be large enough to hold the
  735. entire decompressed kernel plus an additional 128 KiB.
  736. Platforms which normally make use of ROM-able zImage formats
  737. normally set this to a suitable value in their defconfig file.
  738. If ZBOOT_ROM is not enabled, this has no effect.
  739. config ZBOOT_ROM
  740. bool "Compressed boot loader in ROM/flash"
  741. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  742. help
  743. Say Y here if you intend to execute your compressed kernel image
  744. (zImage) directly from ROM or flash. If unsure, say N.
  745. config CMDLINE
  746. string "Default kernel command string"
  747. default ""
  748. help
  749. On some architectures (EBSA110 and CATS), there is currently no way
  750. for the boot loader to pass arguments to the kernel. For these
  751. architectures, you should supply some command-line options at build
  752. time by entering them here. As a minimum, you should specify the
  753. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  754. config XIP_KERNEL
  755. bool "Kernel Execute-In-Place from ROM"
  756. depends on !ZBOOT_ROM
  757. help
  758. Execute-In-Place allows the kernel to run from non-volatile storage
  759. directly addressable by the CPU, such as NOR flash. This saves RAM
  760. space since the text section of the kernel is not loaded from flash
  761. to RAM. Read-write sections, such as the data section and stack,
  762. are still copied to RAM. The XIP kernel is not compressed since
  763. it has to run directly from flash, so it will take more space to
  764. store it. The flash address used to link the kernel object files,
  765. and for storing it, is configuration dependent. Therefore, if you
  766. say Y here, you must know the proper physical address where to
  767. store the kernel image depending on your own flash memory usage.
  768. Also note that the make target becomes "make xipImage" rather than
  769. "make zImage" or "make Image". The final kernel binary to put in
  770. ROM memory will be arch/arm/boot/xipImage.
  771. If unsure, say N.
  772. config XIP_PHYS_ADDR
  773. hex "XIP Kernel Physical Location"
  774. depends on XIP_KERNEL
  775. default "0x00080000"
  776. help
  777. This is the physical address in your flash memory the kernel will
  778. be linked for and stored to. This address is dependent on your
  779. own flash usage.
  780. config KEXEC
  781. bool "Kexec system call (EXPERIMENTAL)"
  782. depends on EXPERIMENTAL
  783. help
  784. kexec is a system call that implements the ability to shutdown your
  785. current kernel, and to start another kernel. It is like a reboot
  786. but it is independent of the system firmware. And like a reboot
  787. you can start any kernel with it, not just Linux.
  788. It is an ongoing process to be certain the hardware in a machine
  789. is properly shutdown, so do not be surprised if this code does not
  790. initially work for you. It may help to enable device hotplugging
  791. support.
  792. config ATAGS_PROC
  793. bool "Export atags in procfs"
  794. depends on KEXEC
  795. default y
  796. help
  797. Should the atags used to boot the kernel be exported in an "atags"
  798. file in procfs. Useful with kexec.
  799. endmenu
  800. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
  801. menu "CPU Frequency scaling"
  802. source "drivers/cpufreq/Kconfig"
  803. config CPU_FREQ_SA1100
  804. bool
  805. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  806. default y
  807. config CPU_FREQ_SA1110
  808. bool
  809. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  810. default y
  811. config CPU_FREQ_INTEGRATOR
  812. tristate "CPUfreq driver for ARM Integrator CPUs"
  813. depends on ARCH_INTEGRATOR && CPU_FREQ
  814. default y
  815. help
  816. This enables the CPUfreq driver for ARM Integrator CPUs.
  817. For details, take a look at <file:Documentation/cpu-freq>.
  818. If in doubt, say Y.
  819. config CPU_FREQ_IMX
  820. tristate "CPUfreq driver for i.MX CPUs"
  821. depends on ARCH_IMX && CPU_FREQ
  822. default n
  823. help
  824. This enables the CPUfreq driver for i.MX CPUs.
  825. If in doubt, say N.
  826. config CPU_FREQ_PXA
  827. bool
  828. depends on CPU_FREQ && ARCH_PXA && PXA25x
  829. default y
  830. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  831. endmenu
  832. endif
  833. menu "Floating point emulation"
  834. comment "At least one emulation must be selected"
  835. config FPE_NWFPE
  836. bool "NWFPE math emulation"
  837. depends on !AEABI || OABI_COMPAT
  838. ---help---
  839. Say Y to include the NWFPE floating point emulator in the kernel.
  840. This is necessary to run most binaries. Linux does not currently
  841. support floating point hardware so you need to say Y here even if
  842. your machine has an FPA or floating point co-processor podule.
  843. You may say N here if you are going to load the Acorn FPEmulator
  844. early in the bootup.
  845. config FPE_NWFPE_XP
  846. bool "Support extended precision"
  847. depends on FPE_NWFPE
  848. help
  849. Say Y to include 80-bit support in the kernel floating-point
  850. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  851. Note that gcc does not generate 80-bit operations by default,
  852. so in most cases this option only enlarges the size of the
  853. floating point emulator without any good reason.
  854. You almost surely want to say N here.
  855. config FPE_FASTFPE
  856. bool "FastFPE math emulation (EXPERIMENTAL)"
  857. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  858. ---help---
  859. Say Y here to include the FAST floating point emulator in the kernel.
  860. This is an experimental much faster emulator which now also has full
  861. precision for the mantissa. It does not support any exceptions.
  862. It is very simple, and approximately 3-6 times faster than NWFPE.
  863. It should be sufficient for most programs. It may be not suitable
  864. for scientific calculations, but you have to check this for yourself.
  865. If you do not feel you need a faster FP emulation you should better
  866. choose NWFPE.
  867. config VFP
  868. bool "VFP-format floating point maths"
  869. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  870. help
  871. Say Y to include VFP support code in the kernel. This is needed
  872. if your hardware includes a VFP unit.
  873. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  874. release notes and additional status information.
  875. Say N if your target does not have VFP hardware.
  876. config VFPv3
  877. bool
  878. depends on VFP
  879. default y if CPU_V7
  880. config NEON
  881. bool "Advanced SIMD (NEON) Extension support"
  882. depends on VFPv3 && CPU_V7
  883. help
  884. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  885. Extension.
  886. endmenu
  887. menu "Userspace binary formats"
  888. source "fs/Kconfig.binfmt"
  889. config ARTHUR
  890. tristate "RISC OS personality"
  891. depends on !AEABI
  892. help
  893. Say Y here to include the kernel code necessary if you want to run
  894. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  895. experimental; if this sounds frightening, say N and sleep in peace.
  896. You can also say M here to compile this support as a module (which
  897. will be called arthur).
  898. endmenu
  899. menu "Power management options"
  900. source "kernel/power/Kconfig"
  901. config ARCH_SUSPEND_POSSIBLE
  902. def_bool y
  903. endmenu
  904. source "net/Kconfig"
  905. menu "Device Drivers"
  906. source "drivers/base/Kconfig"
  907. source "drivers/connector/Kconfig"
  908. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  909. source "drivers/mtd/Kconfig"
  910. endif
  911. source "drivers/parport/Kconfig"
  912. source "drivers/pnp/Kconfig"
  913. source "drivers/block/Kconfig"
  914. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  915. source "drivers/misc/Kconfig"
  916. source "drivers/ide/Kconfig"
  917. source "drivers/scsi/Kconfig"
  918. source "drivers/ata/Kconfig"
  919. source "drivers/md/Kconfig"
  920. source "drivers/message/fusion/Kconfig"
  921. source "drivers/ieee1394/Kconfig"
  922. source "drivers/message/i2o/Kconfig"
  923. source "drivers/net/Kconfig"
  924. source "drivers/isdn/Kconfig"
  925. # input before char - char/joystick depends on it. As does USB.
  926. source "drivers/input/Kconfig"
  927. source "drivers/char/Kconfig"
  928. source "drivers/i2c/Kconfig"
  929. source "drivers/spi/Kconfig"
  930. source "drivers/gpio/Kconfig"
  931. source "drivers/w1/Kconfig"
  932. source "drivers/power/Kconfig"
  933. source "drivers/hwmon/Kconfig"
  934. source "drivers/watchdog/Kconfig"
  935. source "drivers/ssb/Kconfig"
  936. #source "drivers/l3/Kconfig"
  937. source "drivers/mfd/Kconfig"
  938. source "drivers/media/Kconfig"
  939. source "drivers/video/Kconfig"
  940. source "sound/Kconfig"
  941. source "drivers/hid/Kconfig"
  942. source "drivers/usb/Kconfig"
  943. source "drivers/mmc/Kconfig"
  944. source "drivers/leds/Kconfig"
  945. source "drivers/rtc/Kconfig"
  946. source "drivers/dma/Kconfig"
  947. source "drivers/dca/Kconfig"
  948. source "drivers/uio/Kconfig"
  949. endmenu
  950. source "fs/Kconfig"
  951. source "arch/arm/Kconfig.debug"
  952. source "security/Kconfig"
  953. source "crypto/Kconfig"
  954. source "lib/Kconfig"