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