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