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