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 RTC_LIB
  10. select SYS_SUPPORTS_APM_EMULATION
  11. select HAVE_OPROFILE
  12. select HAVE_KPROBES if (!XIP_KERNEL)
  13. select HAVE_KRETPROBES if (HAVE_KPROBES)
  14. help
  15. The ARM series is a line of low-power-consumption RISC chip designs
  16. licensed by ARM Ltd and targeted at embedded applications and
  17. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  18. manufactured, but legacy ARM-based PC hardware remains popular in
  19. Europe. There is an ARM Linux project with a web page at
  20. <http://www.arm.linux.org.uk/>.
  21. config SYS_SUPPORTS_APM_EMULATION
  22. bool
  23. config GENERIC_GPIO
  24. bool
  25. default n
  26. config GENERIC_TIME
  27. bool
  28. default n
  29. config GENERIC_CLOCKEVENTS
  30. bool
  31. default n
  32. config GENERIC_CLOCKEVENTS_BROADCAST
  33. bool
  34. depends on GENERIC_CLOCKEVENTS
  35. default y if SMP && !LOCAL_TIMERS
  36. config MMU
  37. bool
  38. default y
  39. config NO_IOPORT
  40. bool
  41. default n
  42. config EISA
  43. bool
  44. ---help---
  45. The Extended Industry Standard Architecture (EISA) bus was
  46. developed as an open alternative to the IBM MicroChannel bus.
  47. The EISA bus provided some of the features of the IBM MicroChannel
  48. bus while maintaining backward compatibility with cards made for
  49. the older ISA bus. The EISA bus saw limited use between 1988 and
  50. 1995 when it was made obsolete by the PCI bus.
  51. Say Y here if you are building a kernel for an EISA-based machine.
  52. Otherwise, say N.
  53. config SBUS
  54. bool
  55. config MCA
  56. bool
  57. help
  58. MicroChannel Architecture is found in some IBM PS/2 machines and
  59. laptops. It is a bus system similar to PCI or ISA. See
  60. <file:Documentation/mca.txt> (and especially the web page given
  61. there) before attempting to build an MCA bus kernel.
  62. config GENERIC_HARDIRQS
  63. bool
  64. default y
  65. config STACKTRACE_SUPPORT
  66. bool
  67. default y
  68. config LOCKDEP_SUPPORT
  69. bool
  70. default y
  71. config TRACE_IRQFLAGS_SUPPORT
  72. bool
  73. default y
  74. config HARDIRQS_SW_RESEND
  75. bool
  76. default y
  77. config GENERIC_IRQ_PROBE
  78. bool
  79. default y
  80. config GENERIC_LOCKBREAK
  81. bool
  82. default y
  83. depends on SMP && PREEMPT
  84. config RWSEM_GENERIC_SPINLOCK
  85. bool
  86. default y
  87. config RWSEM_XCHGADD_ALGORITHM
  88. bool
  89. config ARCH_HAS_ILOG2_U32
  90. bool
  91. default n
  92. config ARCH_HAS_ILOG2_U64
  93. bool
  94. default n
  95. config GENERIC_HWEIGHT
  96. bool
  97. default y
  98. config GENERIC_CALIBRATE_DELAY
  99. bool
  100. default y
  101. config ARCH_SUPPORTS_AOUT
  102. def_bool y
  103. config ARCH_MAY_HAVE_PC_FDC
  104. bool
  105. config ZONE_DMA
  106. bool
  107. default y
  108. config GENERIC_ISA_DMA
  109. bool
  110. config FIQ
  111. bool
  112. config ARCH_MTD_XIP
  113. bool
  114. if OPROFILE
  115. config OPROFILE_ARMV6
  116. def_bool y
  117. depends on CPU_V6 && !SMP
  118. select OPROFILE_ARM11_CORE
  119. config OPROFILE_MPCORE
  120. def_bool y
  121. depends on CPU_V6 && SMP
  122. select OPROFILE_ARM11_CORE
  123. config OPROFILE_ARM11_CORE
  124. bool
  125. endif
  126. config VECTORS_BASE
  127. hex
  128. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  129. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  130. default 0x00000000
  131. help
  132. The base address of exception vectors.
  133. source "init/Kconfig"
  134. menu "System Type"
  135. choice
  136. prompt "ARM system type"
  137. default ARCH_VERSATILE
  138. config ARCH_AAEC2000
  139. bool "Agilent AAEC-2000 based"
  140. select ARM_AMBA
  141. help
  142. This enables support for systems based on the Agilent AAEC-2000
  143. config ARCH_INTEGRATOR
  144. bool "ARM Ltd. Integrator family"
  145. select ARM_AMBA
  146. select ICST525
  147. help
  148. Support for ARM's Integrator platform.
  149. config ARCH_REALVIEW
  150. bool "ARM Ltd. RealView family"
  151. select ARM_AMBA
  152. select ICST307
  153. select GENERIC_TIME
  154. select GENERIC_CLOCKEVENTS
  155. help
  156. This enables support for ARM Ltd RealView boards.
  157. config ARCH_VERSATILE
  158. bool "ARM Ltd. Versatile family"
  159. select ARM_AMBA
  160. select ARM_VIC
  161. select ICST307
  162. select GENERIC_TIME
  163. select GENERIC_CLOCKEVENTS
  164. help
  165. This enables support for ARM Ltd Versatile board.
  166. config ARCH_AT91
  167. bool "Atmel AT91"
  168. select GENERIC_GPIO
  169. help
  170. This enables support for systems based on the Atmel AT91RM9200,
  171. AT91SAM9 and AT91CAP9 processors.
  172. config ARCH_CLPS7500
  173. bool "Cirrus CL-PS7500FE"
  174. select TIMER_ACORN
  175. select ISA
  176. select NO_IOPORT
  177. select HAVE_IDE
  178. help
  179. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  180. config ARCH_CLPS711X
  181. bool "Cirrus Logic CLPS711x/EP721x-based"
  182. help
  183. Support for Cirrus Logic 711x/721x based boards.
  184. config ARCH_CO285
  185. bool "Co-EBSA285"
  186. select FOOTBRIDGE
  187. select FOOTBRIDGE_ADDIN
  188. select HAVE_IDE
  189. help
  190. Support for Intel's EBSA285 companion chip.
  191. config ARCH_EBSA110
  192. bool "EBSA-110"
  193. select ISA
  194. select NO_IOPORT
  195. help
  196. This is an evaluation board for the StrongARM processor available
  197. from Digital. It has limited hardware on-board, including an
  198. Ethernet interface, two PCMCIA sockets, two serial ports and a
  199. parallel port.
  200. config ARCH_EP93XX
  201. bool "EP93xx-based"
  202. select ARM_AMBA
  203. select ARM_VIC
  204. select GENERIC_GPIO
  205. select HAVE_GPIO_LIB
  206. help
  207. This enables support for the Cirrus EP93xx series of CPUs.
  208. config ARCH_FOOTBRIDGE
  209. bool "FootBridge"
  210. select FOOTBRIDGE
  211. select HAVE_IDE
  212. help
  213. Support for systems based on the DC21285 companion chip
  214. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  215. config ARCH_NETX
  216. bool "Hilscher NetX based"
  217. select ARM_VIC
  218. help
  219. This enables support for systems based on the Hilscher NetX Soc
  220. config ARCH_H720X
  221. bool "Hynix HMS720x-based"
  222. select ISA_DMA_API
  223. help
  224. This enables support for systems based on the Hynix HMS720x
  225. config ARCH_IMX
  226. bool "IMX"
  227. select GENERIC_GPIO
  228. select GENERIC_TIME
  229. select GENERIC_CLOCKEVENTS
  230. help
  231. Support for Motorola's i.MX family of processors (MX1, MXL).
  232. config ARCH_IOP13XX
  233. bool "IOP13xx-based"
  234. depends on MMU
  235. select PLAT_IOP
  236. select PCI
  237. select ARCH_SUPPORTS_MSI
  238. help
  239. Support for Intel's IOP13XX (XScale) family of processors.
  240. config ARCH_IOP32X
  241. bool "IOP32x-based"
  242. depends on MMU
  243. select PLAT_IOP
  244. select PCI
  245. select HAVE_IDE
  246. help
  247. Support for Intel's 80219 and IOP32X (XScale) family of
  248. processors.
  249. config ARCH_IOP33X
  250. bool "IOP33x-based"
  251. depends on MMU
  252. select PLAT_IOP
  253. select PCI
  254. select HAVE_IDE
  255. help
  256. Support for Intel's IOP33X (XScale) family of processors.
  257. config ARCH_IXP23XX
  258. bool "IXP23XX-based"
  259. depends on MMU
  260. select HAVE_IDE
  261. select PCI
  262. help
  263. Support for Intel's IXP23xx (XScale) family of processors.
  264. config ARCH_IXP2000
  265. bool "IXP2400/2800-based"
  266. depends on MMU
  267. select PCI
  268. help
  269. Support for Intel's IXP2400/2800 (XScale) family of processors.
  270. config ARCH_IXP4XX
  271. bool "IXP4xx-based"
  272. depends on MMU
  273. select GENERIC_GPIO
  274. select GENERIC_TIME
  275. select GENERIC_CLOCKEVENTS
  276. select HAVE_IDE
  277. help
  278. Support for Intel's IXP4XX (XScale) family of processors.
  279. config ARCH_L7200
  280. bool "LinkUp-L7200"
  281. select FIQ
  282. select HAVE_IDE
  283. help
  284. Say Y here if you intend to run this kernel on a LinkUp Systems
  285. L7200 Software Development Board which uses an ARM720T processor.
  286. Information on this board can be obtained at:
  287. <http://www.linkupsys.com/>
  288. If you have any questions or comments about the Linux kernel port
  289. to this board, send e-mail to <sjhill@cotw.com>.
  290. config ARCH_KS8695
  291. bool "Micrel/Kendin KS8695"
  292. select GENERIC_GPIO
  293. help
  294. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  295. System-on-Chip devices.
  296. config ARCH_NS9XXX
  297. bool "NetSilicon NS9xxx"
  298. select GENERIC_GPIO
  299. select GENERIC_TIME
  300. select GENERIC_CLOCKEVENTS
  301. help
  302. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  303. System.
  304. <http://www.digi.com/products/microprocessors/index.jsp>
  305. config ARCH_MXC
  306. bool "Freescale MXC/iMX-based"
  307. select ARCH_MTD_XIP
  308. help
  309. Support for Freescale MXC/iMX-based family of processors
  310. config ARCH_ORION5X
  311. bool "Marvell Orion"
  312. depends on MMU
  313. select PCI
  314. select GENERIC_GPIO
  315. select GENERIC_TIME
  316. select GENERIC_CLOCKEVENTS
  317. select PLAT_ORION
  318. help
  319. Support for the following Marvell Orion 5x series SoCs:
  320. Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)
  321. config ARCH_PNX4008
  322. bool "Philips Nexperia PNX4008 Mobile"
  323. help
  324. This enables support for Philips PNX4008 mobile platform.
  325. config ARCH_PXA
  326. bool "PXA2xx/PXA3xx-based"
  327. depends on MMU
  328. select ARCH_MTD_XIP
  329. select GENERIC_GPIO
  330. select HAVE_IDE
  331. select HAVE_GPIO_LIB
  332. select GENERIC_TIME
  333. select GENERIC_CLOCKEVENTS
  334. select TICK_ONESHOT
  335. help
  336. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  337. config ARCH_RPC
  338. bool "RiscPC"
  339. select ARCH_ACORN
  340. select FIQ
  341. select TIMER_ACORN
  342. select ARCH_MAY_HAVE_PC_FDC
  343. select ISA_DMA_API
  344. select NO_IOPORT
  345. select HAVE_IDE
  346. help
  347. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  348. CD-ROM interface, serial and parallel port, and the floppy drive.
  349. config ARCH_SA1100
  350. bool "SA1100-based"
  351. select ISA
  352. select ARCH_DISCONTIGMEM_ENABLE
  353. select ARCH_SPARSEMEM_ENABLE
  354. select ARCH_SELECT_MEMORY_MODEL
  355. select ARCH_MTD_XIP
  356. select GENERIC_GPIO
  357. select GENERIC_TIME
  358. select GENERIC_CLOCKEVENTS
  359. select TICK_ONESHOT
  360. select HAVE_IDE
  361. select HAVE_GPIO_LIB
  362. help
  363. Support for StrongARM 11x0 based boards.
  364. config ARCH_S3C2410
  365. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  366. select GENERIC_GPIO
  367. select HAVE_IDE
  368. help
  369. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  370. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  371. the Samsung SMDK2410 development board (and derivatives).
  372. config ARCH_SHARK
  373. bool "Shark"
  374. select HAVE_IDE
  375. select ISA
  376. select ISA_DMA
  377. select PCI
  378. help
  379. Support for the StrongARM based Digital DNARD machine, also known
  380. as "Shark" (<http://www.shark-linux.de/shark.html>).
  381. config ARCH_LH7A40X
  382. bool "Sharp LH7A40X"
  383. select HAVE_IDE
  384. help
  385. Say Y here for systems based on one of the Sharp LH7A40X
  386. System on a Chip processors. These CPUs include an ARM922T
  387. core with a wide array of integrated devices for
  388. hand-held and low-power applications.
  389. config ARCH_DAVINCI
  390. bool "TI DaVinci"
  391. select GENERIC_TIME
  392. select GENERIC_CLOCKEVENTS
  393. select GENERIC_GPIO
  394. help
  395. Support for TI's DaVinci platform.
  396. config ARCH_OMAP
  397. bool "TI OMAP"
  398. select GENERIC_GPIO
  399. select GENERIC_TIME
  400. select GENERIC_CLOCKEVENTS
  401. help
  402. Support for TI's OMAP platform (OMAP1 and OMAP2).
  403. config ARCH_MSM7X00A
  404. bool "Qualcomm MSM7X00A"
  405. select GENERIC_TIME
  406. select GENERIC_CLOCKEVENTS
  407. help
  408. Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
  409. apps processor of the MSM7X00A and depends on a shared memory
  410. interface to the ARM9 modem processor which runs the baseband stack
  411. and controls some vital subsystems (clock and power control, etc).
  412. <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
  413. endchoice
  414. source "arch/arm/mach-clps711x/Kconfig"
  415. source "arch/arm/mach-ep93xx/Kconfig"
  416. source "arch/arm/mach-footbridge/Kconfig"
  417. source "arch/arm/mach-integrator/Kconfig"
  418. source "arch/arm/mach-iop32x/Kconfig"
  419. source "arch/arm/mach-iop33x/Kconfig"
  420. source "arch/arm/mach-iop13xx/Kconfig"
  421. source "arch/arm/mach-ixp4xx/Kconfig"
  422. source "arch/arm/mach-ixp2000/Kconfig"
  423. source "arch/arm/mach-ixp23xx/Kconfig"
  424. source "arch/arm/mach-pxa/Kconfig"
  425. source "arch/arm/mach-sa1100/Kconfig"
  426. source "arch/arm/plat-omap/Kconfig"
  427. source "arch/arm/mach-omap1/Kconfig"
  428. source "arch/arm/mach-omap2/Kconfig"
  429. source "arch/arm/mach-orion5x/Kconfig"
  430. source "arch/arm/plat-s3c24xx/Kconfig"
  431. source "arch/arm/plat-s3c/Kconfig"
  432. if ARCH_S3C2410
  433. source "arch/arm/mach-s3c2400/Kconfig"
  434. source "arch/arm/mach-s3c2410/Kconfig"
  435. source "arch/arm/mach-s3c2412/Kconfig"
  436. source "arch/arm/mach-s3c2440/Kconfig"
  437. source "arch/arm/mach-s3c2442/Kconfig"
  438. source "arch/arm/mach-s3c2443/Kconfig"
  439. endif
  440. source "arch/arm/mach-lh7a40x/Kconfig"
  441. source "arch/arm/mach-imx/Kconfig"
  442. source "arch/arm/mach-h720x/Kconfig"
  443. source "arch/arm/mach-versatile/Kconfig"
  444. source "arch/arm/mach-aaec2000/Kconfig"
  445. source "arch/arm/mach-realview/Kconfig"
  446. source "arch/arm/mach-at91/Kconfig"
  447. source "arch/arm/plat-mxc/Kconfig"
  448. source "arch/arm/mach-netx/Kconfig"
  449. source "arch/arm/mach-ns9xxx/Kconfig"
  450. source "arch/arm/mach-davinci/Kconfig"
  451. source "arch/arm/mach-ks8695/Kconfig"
  452. source "arch/arm/mach-msm/Kconfig"
  453. # Definitions to make life easier
  454. config ARCH_ACORN
  455. bool
  456. config PLAT_IOP
  457. bool
  458. config PLAT_ORION
  459. bool
  460. source arch/arm/mm/Kconfig
  461. config IWMMXT
  462. bool "Enable iWMMXt support"
  463. depends on CPU_XSCALE || CPU_XSC3
  464. default y if PXA27x || PXA3xx
  465. help
  466. Enable support for iWMMXt context switching at run time if
  467. running on a CPU that supports it.
  468. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  469. config XSCALE_PMU
  470. bool
  471. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  472. default y
  473. if !MMU
  474. source "arch/arm/Kconfig-nommu"
  475. endif
  476. endmenu
  477. source "arch/arm/common/Kconfig"
  478. config FORCE_MAX_ZONEORDER
  479. int
  480. depends on SA1111
  481. default "9"
  482. menu "Bus support"
  483. config ARM_AMBA
  484. bool
  485. config ISA
  486. bool
  487. help
  488. Find out whether you have ISA slots on your motherboard. ISA is the
  489. name of a bus system, i.e. the way the CPU talks to the other stuff
  490. inside your box. Other bus systems are PCI, EISA, MicroChannel
  491. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  492. newer boards don't support it. If you have ISA, say Y, otherwise N.
  493. # Select ISA DMA controller support
  494. config ISA_DMA
  495. bool
  496. select ISA_DMA_API
  497. # Select ISA DMA interface
  498. config ISA_DMA_API
  499. bool
  500. config PCI
  501. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  502. help
  503. Find out whether you have a PCI motherboard. PCI is the name of a
  504. bus system, i.e. the way the CPU talks to the other stuff inside
  505. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  506. VESA. If you have PCI, say Y, otherwise N.
  507. config PCI_SYSCALL
  508. def_bool PCI
  509. # Select the host bridge type
  510. config PCI_HOST_VIA82C505
  511. bool
  512. depends on PCI && ARCH_SHARK
  513. default y
  514. config PCI_HOST_ITE8152
  515. bool
  516. depends on PCI && MACH_ARMCORE
  517. default y
  518. select DMABOUNCE
  519. source "drivers/pci/Kconfig"
  520. source "drivers/pcmcia/Kconfig"
  521. endmenu
  522. menu "Kernel Features"
  523. source "kernel/time/Kconfig"
  524. config SMP
  525. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  526. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  527. help
  528. This enables support for systems with more than one CPU. If you have
  529. a system with only one CPU, like most personal computers, say N. If
  530. you have a system with more than one CPU, say Y.
  531. If you say N here, the kernel will run on single and multiprocessor
  532. machines, but will use only one CPU of a multiprocessor machine. If
  533. you say Y here, the kernel will run on many, but not all, single
  534. processor machines. On a single processor machine, the kernel will
  535. run faster if you say N here.
  536. See also <file:Documentation/i386/IO-APIC.txt>,
  537. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  538. <http://www.linuxdoc.org/docs.html#howto>.
  539. If you don't know what to do here, say N.
  540. config NR_CPUS
  541. int "Maximum number of CPUs (2-32)"
  542. range 2 32
  543. depends on SMP
  544. default "4"
  545. config HOTPLUG_CPU
  546. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  547. depends on SMP && HOTPLUG && EXPERIMENTAL
  548. help
  549. Say Y here to experiment with turning CPUs off and on. CPUs
  550. can be controlled through /sys/devices/system/cpu.
  551. config LOCAL_TIMERS
  552. bool "Use local timer interrupts"
  553. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  554. default y
  555. help
  556. Enable support for local timers on SMP platforms, rather then the
  557. legacy IPI broadcast method. Local timers allows the system
  558. accounting to be spread across the timer interval, preventing a
  559. "thundering herd" at every timer tick.
  560. config PREEMPT
  561. bool "Preemptible Kernel (EXPERIMENTAL)"
  562. depends on EXPERIMENTAL
  563. help
  564. This option reduces the latency of the kernel when reacting to
  565. real-time or interactive events by allowing a low priority process to
  566. be preempted even if it is in kernel mode executing a system call.
  567. This allows applications to run more reliably even when the system is
  568. under load.
  569. Say Y here if you are building a kernel for a desktop, embedded
  570. or real-time system. Say N if you are unsure.
  571. config NO_IDLE_HZ
  572. bool "Dynamic tick timer"
  573. depends on !GENERIC_CLOCKEVENTS
  574. help
  575. Select this option if you want to disable continuous timer ticks
  576. and have them programmed to occur as required. This option saves
  577. power as the system can remain in idle state for longer.
  578. By default dynamic tick is disabled during the boot, and can be
  579. manually enabled with:
  580. echo 1 > /sys/devices/system/timer/timer0/dyn_tick
  581. Alternatively, if you want dynamic tick automatically enabled
  582. during boot, pass "dyntick=enable" via the kernel command string.
  583. Please note that dynamic tick may affect the accuracy of
  584. timekeeping on some platforms depending on the implementation.
  585. Currently at least OMAP, PXA2xx and SA11x0 platforms are known
  586. to have accurate timekeeping with dynamic tick.
  587. config HZ
  588. int
  589. default 128 if ARCH_L7200
  590. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  591. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  592. default AT91_TIMER_HZ if ARCH_AT91
  593. default 100
  594. config AEABI
  595. bool "Use the ARM EABI to compile the kernel"
  596. help
  597. This option allows for the kernel to be compiled using the latest
  598. ARM ABI (aka EABI). This is only useful if you are using a user
  599. space environment that is also compiled with EABI.
  600. Since there are major incompatibilities between the legacy ABI and
  601. EABI, especially with regard to structure member alignment, this
  602. option also changes the kernel syscall calling convention to
  603. disambiguate both ABIs and allow for backward compatibility support
  604. (selected with CONFIG_OABI_COMPAT).
  605. To use this you need GCC version 4.0.0 or later.
  606. config OABI_COMPAT
  607. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  608. depends on AEABI && EXPERIMENTAL
  609. default y
  610. help
  611. This option preserves the old syscall interface along with the
  612. new (ARM EABI) one. It also provides a compatibility layer to
  613. intercept syscalls that have structure arguments which layout
  614. in memory differs between the legacy ABI and the new ARM EABI
  615. (only for non "thumb" binaries). This option adds a tiny
  616. overhead to all syscalls and produces a slightly larger kernel.
  617. If you know you'll be using only pure EABI user space then you
  618. can say N here. If this option is not selected and you attempt
  619. to execute a legacy ABI binary then the result will be
  620. UNPREDICTABLE (in fact it can be predicted that it won't work
  621. at all). If in doubt say Y.
  622. config ARCH_DISCONTIGMEM_ENABLE
  623. bool
  624. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  625. help
  626. Say Y to support efficient handling of discontiguous physical memory,
  627. for architectures which are either NUMA (Non-Uniform Memory Access)
  628. or have huge holes in the physical address space for other reasons.
  629. See <file:Documentation/vm/numa> for more.
  630. config ARCH_SPARSEMEM_ENABLE
  631. bool
  632. config ARCH_SELECT_MEMORY_MODEL
  633. bool
  634. config NODES_SHIFT
  635. int
  636. default "4" if ARCH_LH7A40X
  637. default "2"
  638. depends on NEED_MULTIPLE_NODES
  639. source "mm/Kconfig"
  640. config LEDS
  641. bool "Timer and CPU usage LEDs"
  642. depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
  643. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  644. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  645. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  646. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  647. ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
  648. ARCH_KS8695 || MACH_RD88F5182
  649. help
  650. If you say Y here, the LEDs on your machine will be used
  651. to provide useful information about your current system status.
  652. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  653. be able to select which LEDs are active using the options below. If
  654. you are compiling a kernel for the EBSA-110 or the LART however, the
  655. red LED will simply flash regularly to indicate that the system is
  656. still functional. It is safe to say Y here if you have a CATS
  657. system, but the driver will do nothing.
  658. config LEDS_TIMER
  659. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  660. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  661. || MACH_OMAP_PERSEUS2
  662. depends on LEDS
  663. depends on !GENERIC_CLOCKEVENTS
  664. default y if ARCH_EBSA110
  665. help
  666. If you say Y here, one of the system LEDs (the green one on the
  667. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  668. will flash regularly to indicate that the system is still
  669. operational. This is mainly useful to kernel hackers who are
  670. debugging unstable kernels.
  671. The LART uses the same LED for both Timer LED and CPU usage LED
  672. functions. You may choose to use both, but the Timer LED function
  673. will overrule the CPU usage LED.
  674. config LEDS_CPU
  675. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  676. !ARCH_OMAP) \
  677. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  678. || MACH_OMAP_PERSEUS2
  679. depends on LEDS
  680. help
  681. If you say Y here, the red LED will be used to give a good real
  682. time indication of CPU usage, by lighting whenever the idle task
  683. is not currently executing.
  684. The LART uses the same LED for both Timer LED and CPU usage LED
  685. functions. You may choose to use both, but the Timer LED function
  686. will overrule the CPU usage LED.
  687. config ALIGNMENT_TRAP
  688. bool
  689. depends on CPU_CP15_MMU
  690. default y if !ARCH_EBSA110
  691. help
  692. ARM processors cannot fetch/store information which is not
  693. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  694. address divisible by 4. On 32-bit ARM processors, these non-aligned
  695. fetch/store instructions will be emulated in software if you say
  696. here, which has a severe performance impact. This is necessary for
  697. correct operation of some network protocols. With an IP-only
  698. configuration it is safe to say N, otherwise say Y.
  699. endmenu
  700. menu "Boot options"
  701. # Compressed boot loader in ROM. Yes, we really want to ask about
  702. # TEXT and BSS so we preserve their values in the config files.
  703. config ZBOOT_ROM_TEXT
  704. hex "Compressed ROM boot loader base address"
  705. default "0"
  706. help
  707. The physical address at which the ROM-able zImage is to be
  708. placed in the target. Platforms which normally make use of
  709. ROM-able zImage formats normally set this to a suitable
  710. value in their defconfig file.
  711. If ZBOOT_ROM is not enabled, this has no effect.
  712. config ZBOOT_ROM_BSS
  713. hex "Compressed ROM boot loader BSS address"
  714. default "0"
  715. help
  716. The base address of an area of read/write memory in the target
  717. for the ROM-able zImage which must be available while the
  718. decompressor is running. It must be large enough to hold the
  719. entire decompressed kernel plus an additional 128 KiB.
  720. Platforms which normally make use of ROM-able zImage formats
  721. normally set this to a suitable value in their defconfig file.
  722. If ZBOOT_ROM is not enabled, this has no effect.
  723. config ZBOOT_ROM
  724. bool "Compressed boot loader in ROM/flash"
  725. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  726. help
  727. Say Y here if you intend to execute your compressed kernel image
  728. (zImage) directly from ROM or flash. If unsure, say N.
  729. config CMDLINE
  730. string "Default kernel command string"
  731. default ""
  732. help
  733. On some architectures (EBSA110 and CATS), there is currently no way
  734. for the boot loader to pass arguments to the kernel. For these
  735. architectures, you should supply some command-line options at build
  736. time by entering them here. As a minimum, you should specify the
  737. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  738. config XIP_KERNEL
  739. bool "Kernel Execute-In-Place from ROM"
  740. depends on !ZBOOT_ROM
  741. help
  742. Execute-In-Place allows the kernel to run from non-volatile storage
  743. directly addressable by the CPU, such as NOR flash. This saves RAM
  744. space since the text section of the kernel is not loaded from flash
  745. to RAM. Read-write sections, such as the data section and stack,
  746. are still copied to RAM. The XIP kernel is not compressed since
  747. it has to run directly from flash, so it will take more space to
  748. store it. The flash address used to link the kernel object files,
  749. and for storing it, is configuration dependent. Therefore, if you
  750. say Y here, you must know the proper physical address where to
  751. store the kernel image depending on your own flash memory usage.
  752. Also note that the make target becomes "make xipImage" rather than
  753. "make zImage" or "make Image". The final kernel binary to put in
  754. ROM memory will be arch/arm/boot/xipImage.
  755. If unsure, say N.
  756. config XIP_PHYS_ADDR
  757. hex "XIP Kernel Physical Location"
  758. depends on XIP_KERNEL
  759. default "0x00080000"
  760. help
  761. This is the physical address in your flash memory the kernel will
  762. be linked for and stored to. This address is dependent on your
  763. own flash usage.
  764. config KEXEC
  765. bool "Kexec system call (EXPERIMENTAL)"
  766. depends on EXPERIMENTAL
  767. help
  768. kexec is a system call that implements the ability to shutdown your
  769. current kernel, and to start another kernel. It is like a reboot
  770. but it is independent of the system firmware. And like a reboot
  771. you can start any kernel with it, not just Linux.
  772. It is an ongoing process to be certain the hardware in a machine
  773. is properly shutdown, so do not be surprised if this code does not
  774. initially work for you. It may help to enable device hotplugging
  775. support.
  776. config ATAGS_PROC
  777. bool "Export atags in procfs"
  778. depends on KEXEC
  779. default y
  780. help
  781. Should the atags used to boot the kernel be exported in an "atags"
  782. file in procfs. Useful with kexec.
  783. endmenu
  784. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
  785. menu "CPU Frequency scaling"
  786. source "drivers/cpufreq/Kconfig"
  787. config CPU_FREQ_SA1100
  788. bool
  789. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  790. default y
  791. config CPU_FREQ_SA1110
  792. bool
  793. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  794. default y
  795. config CPU_FREQ_INTEGRATOR
  796. tristate "CPUfreq driver for ARM Integrator CPUs"
  797. depends on ARCH_INTEGRATOR && CPU_FREQ
  798. default y
  799. help
  800. This enables the CPUfreq driver for ARM Integrator CPUs.
  801. For details, take a look at <file:Documentation/cpu-freq>.
  802. If in doubt, say Y.
  803. config CPU_FREQ_IMX
  804. tristate "CPUfreq driver for i.MX CPUs"
  805. depends on ARCH_IMX && CPU_FREQ
  806. default n
  807. help
  808. This enables the CPUfreq driver for i.MX CPUs.
  809. If in doubt, say N.
  810. config CPU_FREQ_PXA
  811. bool
  812. depends on CPU_FREQ && ARCH_PXA && PXA25x
  813. default y
  814. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  815. endmenu
  816. endif
  817. menu "Floating point emulation"
  818. comment "At least one emulation must be selected"
  819. config FPE_NWFPE
  820. bool "NWFPE math emulation"
  821. depends on !AEABI || OABI_COMPAT
  822. ---help---
  823. Say Y to include the NWFPE floating point emulator in the kernel.
  824. This is necessary to run most binaries. Linux does not currently
  825. support floating point hardware so you need to say Y here even if
  826. your machine has an FPA or floating point co-processor podule.
  827. You may say N here if you are going to load the Acorn FPEmulator
  828. early in the bootup.
  829. config FPE_NWFPE_XP
  830. bool "Support extended precision"
  831. depends on FPE_NWFPE
  832. help
  833. Say Y to include 80-bit support in the kernel floating-point
  834. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  835. Note that gcc does not generate 80-bit operations by default,
  836. so in most cases this option only enlarges the size of the
  837. floating point emulator without any good reason.
  838. You almost surely want to say N here.
  839. config FPE_FASTFPE
  840. bool "FastFPE math emulation (EXPERIMENTAL)"
  841. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  842. ---help---
  843. Say Y here to include the FAST floating point emulator in the kernel.
  844. This is an experimental much faster emulator which now also has full
  845. precision for the mantissa. It does not support any exceptions.
  846. It is very simple, and approximately 3-6 times faster than NWFPE.
  847. It should be sufficient for most programs. It may be not suitable
  848. for scientific calculations, but you have to check this for yourself.
  849. If you do not feel you need a faster FP emulation you should better
  850. choose NWFPE.
  851. config VFP
  852. bool "VFP-format floating point maths"
  853. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  854. help
  855. Say Y to include VFP support code in the kernel. This is needed
  856. if your hardware includes a VFP unit.
  857. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  858. release notes and additional status information.
  859. Say N if your target does not have VFP hardware.
  860. config VFPv3
  861. bool
  862. depends on VFP
  863. default y if CPU_V7
  864. config NEON
  865. bool "Advanced SIMD (NEON) Extension support"
  866. depends on VFPv3 && CPU_V7
  867. help
  868. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  869. Extension.
  870. endmenu
  871. menu "Userspace binary formats"
  872. source "fs/Kconfig.binfmt"
  873. config ARTHUR
  874. tristate "RISC OS personality"
  875. depends on !AEABI
  876. help
  877. Say Y here to include the kernel code necessary if you want to run
  878. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  879. experimental; if this sounds frightening, say N and sleep in peace.
  880. You can also say M here to compile this support as a module (which
  881. will be called arthur).
  882. endmenu
  883. menu "Power management options"
  884. source "kernel/power/Kconfig"
  885. config ARCH_SUSPEND_POSSIBLE
  886. def_bool y
  887. endmenu
  888. source "net/Kconfig"
  889. menu "Device Drivers"
  890. source "drivers/base/Kconfig"
  891. source "drivers/connector/Kconfig"
  892. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  893. source "drivers/mtd/Kconfig"
  894. endif
  895. source "drivers/parport/Kconfig"
  896. source "drivers/pnp/Kconfig"
  897. source "drivers/block/Kconfig"
  898. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  899. source "drivers/misc/Kconfig"
  900. source "drivers/ide/Kconfig"
  901. source "drivers/scsi/Kconfig"
  902. source "drivers/ata/Kconfig"
  903. source "drivers/md/Kconfig"
  904. source "drivers/message/fusion/Kconfig"
  905. source "drivers/ieee1394/Kconfig"
  906. source "drivers/message/i2o/Kconfig"
  907. source "drivers/net/Kconfig"
  908. source "drivers/isdn/Kconfig"
  909. # input before char - char/joystick depends on it. As does USB.
  910. source "drivers/input/Kconfig"
  911. source "drivers/char/Kconfig"
  912. source "drivers/i2c/Kconfig"
  913. source "drivers/spi/Kconfig"
  914. source "drivers/gpio/Kconfig"
  915. source "drivers/w1/Kconfig"
  916. source "drivers/power/Kconfig"
  917. source "drivers/hwmon/Kconfig"
  918. source "drivers/watchdog/Kconfig"
  919. source "drivers/ssb/Kconfig"
  920. #source "drivers/l3/Kconfig"
  921. source "drivers/mfd/Kconfig"
  922. source "drivers/media/Kconfig"
  923. source "drivers/video/Kconfig"
  924. source "sound/Kconfig"
  925. source "drivers/hid/Kconfig"
  926. source "drivers/usb/Kconfig"
  927. source "drivers/mmc/Kconfig"
  928. source "drivers/leds/Kconfig"
  929. source "drivers/rtc/Kconfig"
  930. source "drivers/dma/Kconfig"
  931. source "drivers/dca/Kconfig"
  932. endmenu
  933. source "fs/Kconfig"
  934. source "arch/arm/Kconfig.debug"
  935. source "security/Kconfig"
  936. source "crypto/Kconfig"
  937. source "lib/Kconfig"