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