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