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 RTC_LIB
  10. select SYS_SUPPORTS_APM_EMULATION
  11. select HAVE_OPROFILE
  12. select HAVE_KPROBES if (!XIP_KERNEL)
  13. select HAVE_KRETPROBES if (HAVE_KPROBES)
  14. help
  15. The ARM series is a line of low-power-consumption RISC chip designs
  16. licensed by ARM Ltd and targeted at embedded applications and
  17. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  18. manufactured, but legacy ARM-based PC hardware remains popular in
  19. Europe. There is an ARM Linux project with a web page at
  20. <http://www.arm.linux.org.uk/>.
  21. config SYS_SUPPORTS_APM_EMULATION
  22. bool
  23. config GENERIC_GPIO
  24. bool
  25. default n
  26. config GENERIC_TIME
  27. bool
  28. default n
  29. config GENERIC_CLOCKEVENTS
  30. bool
  31. default n
  32. config GENERIC_CLOCKEVENTS_BROADCAST
  33. bool
  34. depends on GENERIC_CLOCKEVENTS
  35. default y if SMP && !LOCAL_TIMERS
  36. config MMU
  37. bool
  38. default y
  39. config NO_IOPORT
  40. bool
  41. default n
  42. config EISA
  43. bool
  44. ---help---
  45. The Extended Industry Standard Architecture (EISA) bus was
  46. developed as an open alternative to the IBM MicroChannel bus.
  47. The EISA bus provided some of the features of the IBM MicroChannel
  48. bus while maintaining backward compatibility with cards made for
  49. the older ISA bus. The EISA bus saw limited use between 1988 and
  50. 1995 when it was made obsolete by the PCI bus.
  51. Say Y here if you are building a kernel for an EISA-based machine.
  52. Otherwise, say N.
  53. config SBUS
  54. bool
  55. config MCA
  56. bool
  57. help
  58. MicroChannel Architecture is found in some IBM PS/2 machines and
  59. laptops. It is a bus system similar to PCI or ISA. See
  60. <file:Documentation/mca.txt> (and especially the web page given
  61. there) before attempting to build an MCA bus kernel.
  62. config GENERIC_HARDIRQS
  63. bool
  64. default y
  65. config STACKTRACE_SUPPORT
  66. bool
  67. default y
  68. config LOCKDEP_SUPPORT
  69. bool
  70. default y
  71. config TRACE_IRQFLAGS_SUPPORT
  72. bool
  73. default y
  74. config HARDIRQS_SW_RESEND
  75. bool
  76. default y
  77. config GENERIC_IRQ_PROBE
  78. bool
  79. default y
  80. config GENERIC_LOCKBREAK
  81. bool
  82. default y
  83. depends on SMP && PREEMPT
  84. config RWSEM_GENERIC_SPINLOCK
  85. bool
  86. default y
  87. config RWSEM_XCHGADD_ALGORITHM
  88. bool
  89. config ARCH_HAS_ILOG2_U32
  90. bool
  91. default n
  92. config ARCH_HAS_ILOG2_U64
  93. bool
  94. default n
  95. config GENERIC_HWEIGHT
  96. bool
  97. default y
  98. config GENERIC_CALIBRATE_DELAY
  99. bool
  100. default y
  101. config ARCH_SUPPORTS_AOUT
  102. def_bool y
  103. config ARCH_MAY_HAVE_PC_FDC
  104. bool
  105. config ZONE_DMA
  106. bool
  107. default y
  108. config GENERIC_ISA_DMA
  109. bool
  110. config FIQ
  111. bool
  112. config ARCH_MTD_XIP
  113. bool
  114. if OPROFILE
  115. config OPROFILE_ARMV6
  116. def_bool y
  117. depends on CPU_V6 && !SMP
  118. select OPROFILE_ARM11_CORE
  119. config OPROFILE_MPCORE
  120. def_bool y
  121. depends on CPU_V6 && SMP
  122. select OPROFILE_ARM11_CORE
  123. config OPROFILE_ARM11_CORE
  124. bool
  125. endif
  126. config VECTORS_BASE
  127. hex
  128. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  129. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  130. default 0x00000000
  131. help
  132. The base address of exception vectors.
  133. source "init/Kconfig"
  134. menu "System Type"
  135. choice
  136. prompt "ARM system type"
  137. default ARCH_VERSATILE
  138. config ARCH_AAEC2000
  139. bool "Agilent AAEC-2000 based"
  140. select ARM_AMBA
  141. help
  142. This enables support for systems based on the Agilent AAEC-2000
  143. config ARCH_INTEGRATOR
  144. bool "ARM Ltd. Integrator family"
  145. select ARM_AMBA
  146. select ICST525
  147. help
  148. Support for ARM's Integrator platform.
  149. config ARCH_REALVIEW
  150. bool "ARM Ltd. RealView family"
  151. select ARM_AMBA
  152. select ICST307
  153. select GENERIC_TIME
  154. select GENERIC_CLOCKEVENTS
  155. help
  156. This enables support for ARM Ltd RealView boards.
  157. config ARCH_VERSATILE
  158. bool "ARM Ltd. Versatile family"
  159. select ARM_AMBA
  160. select ARM_VIC
  161. select ICST307
  162. select GENERIC_TIME
  163. select GENERIC_CLOCKEVENTS
  164. help
  165. This enables support for ARM Ltd Versatile board.
  166. config ARCH_AT91
  167. bool "Atmel AT91"
  168. select GENERIC_GPIO
  169. help
  170. This enables support for systems based on the Atmel AT91RM9200,
  171. AT91SAM9 and AT91CAP9 processors.
  172. config ARCH_CLPS7500
  173. bool "Cirrus CL-PS7500FE"
  174. select TIMER_ACORN
  175. select ISA
  176. select NO_IOPORT
  177. select HAVE_IDE
  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_CO285
  185. bool "Co-EBSA285"
  186. select FOOTBRIDGE
  187. select FOOTBRIDGE_ADDIN
  188. select HAVE_IDE
  189. help
  190. Support for Intel's EBSA285 companion chip.
  191. config ARCH_EBSA110
  192. bool "EBSA-110"
  193. select ISA
  194. select NO_IOPORT
  195. help
  196. This is an evaluation board for the StrongARM processor available
  197. from Digital. It has limited hardware on-board, including an
  198. Ethernet interface, two PCMCIA sockets, two serial ports and a
  199. parallel port.
  200. config ARCH_EP93XX
  201. bool "EP93xx-based"
  202. select ARM_AMBA
  203. select ARM_VIC
  204. select GENERIC_GPIO
  205. help
  206. This enables support for the Cirrus EP93xx series of CPUs.
  207. config ARCH_FOOTBRIDGE
  208. bool "FootBridge"
  209. select FOOTBRIDGE
  210. select HAVE_IDE
  211. help
  212. Support for systems based on the DC21285 companion chip
  213. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  214. config ARCH_NETX
  215. bool "Hilscher NetX based"
  216. select ARM_VIC
  217. help
  218. This enables support for systems based on the Hilscher NetX Soc
  219. config ARCH_H720X
  220. bool "Hynix HMS720x-based"
  221. select ISA_DMA_API
  222. help
  223. This enables support for systems based on the Hynix HMS720x
  224. config ARCH_IMX
  225. bool "IMX"
  226. select GENERIC_GPIO
  227. select GENERIC_TIME
  228. select GENERIC_CLOCKEVENTS
  229. help
  230. Support for Motorola's i.MX family of processors (MX1, MXL).
  231. config ARCH_IOP13XX
  232. bool "IOP13xx-based"
  233. depends on MMU
  234. select PLAT_IOP
  235. select PCI
  236. select ARCH_SUPPORTS_MSI
  237. help
  238. Support for Intel's IOP13XX (XScale) family of processors.
  239. config ARCH_IOP32X
  240. bool "IOP32x-based"
  241. depends on MMU
  242. select PLAT_IOP
  243. select PCI
  244. select HAVE_IDE
  245. help
  246. Support for Intel's 80219 and IOP32X (XScale) family of
  247. processors.
  248. config ARCH_IOP33X
  249. bool "IOP33x-based"
  250. depends on MMU
  251. select PLAT_IOP
  252. select PCI
  253. select HAVE_IDE
  254. help
  255. Support for Intel's IOP33X (XScale) family of processors.
  256. config ARCH_IXP23XX
  257. bool "IXP23XX-based"
  258. depends on MMU
  259. select HAVE_IDE
  260. select PCI
  261. help
  262. Support for Intel's IXP23xx (XScale) family of processors.
  263. config ARCH_IXP2000
  264. bool "IXP2400/2800-based"
  265. depends on MMU
  266. select PCI
  267. help
  268. Support for Intel's IXP2400/2800 (XScale) family of processors.
  269. config ARCH_IXP4XX
  270. bool "IXP4xx-based"
  271. depends on MMU
  272. select GENERIC_GPIO
  273. select GENERIC_TIME
  274. select GENERIC_CLOCKEVENTS
  275. select HAVE_IDE
  276. help
  277. Support for Intel's IXP4XX (XScale) family of processors.
  278. config ARCH_L7200
  279. bool "LinkUp-L7200"
  280. select FIQ
  281. select HAVE_IDE
  282. help
  283. Say Y here if you intend to run this kernel on a LinkUp Systems
  284. L7200 Software Development Board which uses an ARM720T processor.
  285. Information on this board can be obtained at:
  286. <http://www.linkupsys.com/>
  287. If you have any questions or comments about the Linux kernel port
  288. to this board, send e-mail to <sjhill@cotw.com>.
  289. config ARCH_KS8695
  290. bool "Micrel/Kendin KS8695"
  291. select GENERIC_GPIO
  292. help
  293. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  294. System-on-Chip devices.
  295. config ARCH_NS9XXX
  296. bool "NetSilicon NS9xxx"
  297. select GENERIC_GPIO
  298. select GENERIC_TIME
  299. select GENERIC_CLOCKEVENTS
  300. help
  301. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  302. System.
  303. <http://www.digi.com/products/microprocessors/index.jsp>
  304. config ARCH_MXC
  305. bool "Freescale MXC/iMX-based"
  306. select ARCH_MTD_XIP
  307. help
  308. Support for Freescale MXC/iMX-based family of processors
  309. config ARCH_ORION
  310. bool "Marvell Orion"
  311. depends on MMU
  312. select PCI
  313. select GENERIC_GPIO
  314. select GENERIC_TIME
  315. select GENERIC_CLOCKEVENTS
  316. help
  317. Support for Marvell Orion System on Chip family.
  318. config ARCH_PNX4008
  319. bool "Philips Nexperia PNX4008 Mobile"
  320. help
  321. This enables support for Philips PNX4008 mobile platform.
  322. config ARCH_PXA
  323. bool "PXA2xx/PXA3xx-based"
  324. depends on MMU
  325. select ARCH_MTD_XIP
  326. select GENERIC_GPIO
  327. select HAVE_IDE
  328. select HAVE_GPIO_LIB
  329. select GENERIC_TIME
  330. select GENERIC_CLOCKEVENTS
  331. select TICK_ONESHOT
  332. help
  333. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  334. config ARCH_RPC
  335. bool "RiscPC"
  336. select ARCH_ACORN
  337. select FIQ
  338. select TIMER_ACORN
  339. select ARCH_MAY_HAVE_PC_FDC
  340. select ISA_DMA_API
  341. select NO_IOPORT
  342. select HAVE_IDE
  343. help
  344. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  345. CD-ROM interface, serial and parallel port, and the floppy drive.
  346. config ARCH_SA1100
  347. bool "SA1100-based"
  348. select ISA
  349. select ARCH_DISCONTIGMEM_ENABLE
  350. select ARCH_MTD_XIP
  351. select GENERIC_GPIO
  352. select GENERIC_TIME
  353. select HAVE_IDE
  354. help
  355. Support for StrongARM 11x0 based boards.
  356. config ARCH_S3C2410
  357. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  358. select GENERIC_GPIO
  359. select HAVE_IDE
  360. help
  361. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  362. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  363. the Samsung SMDK2410 development board (and derivatives).
  364. config ARCH_SHARK
  365. bool "Shark"
  366. select HAVE_IDE
  367. select ISA
  368. select ISA_DMA
  369. select PCI
  370. help
  371. Support for the StrongARM based Digital DNARD machine, also known
  372. as "Shark" (<http://www.shark-linux.de/shark.html>).
  373. config ARCH_LH7A40X
  374. bool "Sharp LH7A40X"
  375. select HAVE_IDE
  376. help
  377. Say Y here for systems based on one of the Sharp LH7A40X
  378. System on a Chip processors. These CPUs include an ARM922T
  379. core with a wide array of integrated devices for
  380. hand-held and low-power applications.
  381. config ARCH_DAVINCI
  382. bool "TI DaVinci"
  383. select GENERIC_TIME
  384. select GENERIC_CLOCKEVENTS
  385. select GENERIC_GPIO
  386. help
  387. Support for TI's DaVinci platform.
  388. config ARCH_OMAP
  389. bool "TI OMAP"
  390. select GENERIC_GPIO
  391. select GENERIC_TIME
  392. select GENERIC_CLOCKEVENTS
  393. help
  394. Support for TI's OMAP platform (OMAP1 and OMAP2).
  395. config ARCH_MSM7X00A
  396. bool "Qualcomm MSM7X00A"
  397. select GENERIC_TIME
  398. select GENERIC_CLOCKEVENTS
  399. help
  400. Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
  401. apps processor of the MSM7X00A and depends on a shared memory
  402. interface to the ARM9 modem processor which runs the baseband stack
  403. and controls some vital subsystems (clock and power control, etc).
  404. <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
  405. endchoice
  406. source "arch/arm/mach-clps711x/Kconfig"
  407. source "arch/arm/mach-ep93xx/Kconfig"
  408. source "arch/arm/mach-footbridge/Kconfig"
  409. source "arch/arm/mach-integrator/Kconfig"
  410. source "arch/arm/mach-iop32x/Kconfig"
  411. source "arch/arm/mach-iop33x/Kconfig"
  412. source "arch/arm/mach-iop13xx/Kconfig"
  413. source "arch/arm/mach-ixp4xx/Kconfig"
  414. source "arch/arm/mach-ixp2000/Kconfig"
  415. source "arch/arm/mach-ixp23xx/Kconfig"
  416. source "arch/arm/mach-pxa/Kconfig"
  417. source "arch/arm/mach-sa1100/Kconfig"
  418. source "arch/arm/plat-omap/Kconfig"
  419. source "arch/arm/mach-omap1/Kconfig"
  420. source "arch/arm/mach-omap2/Kconfig"
  421. source "arch/arm/mach-orion/Kconfig"
  422. source "arch/arm/plat-s3c24xx/Kconfig"
  423. source "arch/arm/plat-s3c/Kconfig"
  424. if ARCH_S3C2410
  425. source "arch/arm/mach-s3c2400/Kconfig"
  426. source "arch/arm/mach-s3c2410/Kconfig"
  427. source "arch/arm/mach-s3c2412/Kconfig"
  428. source "arch/arm/mach-s3c2440/Kconfig"
  429. source "arch/arm/mach-s3c2442/Kconfig"
  430. source "arch/arm/mach-s3c2443/Kconfig"
  431. endif
  432. source "arch/arm/mach-lh7a40x/Kconfig"
  433. source "arch/arm/mach-imx/Kconfig"
  434. source "arch/arm/mach-h720x/Kconfig"
  435. source "arch/arm/mach-versatile/Kconfig"
  436. source "arch/arm/mach-aaec2000/Kconfig"
  437. source "arch/arm/mach-realview/Kconfig"
  438. source "arch/arm/mach-at91/Kconfig"
  439. source "arch/arm/plat-mxc/Kconfig"
  440. source "arch/arm/mach-netx/Kconfig"
  441. source "arch/arm/mach-ns9xxx/Kconfig"
  442. source "arch/arm/mach-davinci/Kconfig"
  443. source "arch/arm/mach-ks8695/Kconfig"
  444. source "arch/arm/mach-msm/Kconfig"
  445. # Definitions to make life easier
  446. config ARCH_ACORN
  447. bool
  448. config PLAT_IOP
  449. bool
  450. source arch/arm/mm/Kconfig
  451. config IWMMXT
  452. bool "Enable iWMMXt support"
  453. depends on CPU_XSCALE || CPU_XSC3
  454. default y if PXA27x || PXA3xx
  455. help
  456. Enable support for iWMMXt context switching at run time if
  457. running on a CPU that supports it.
  458. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  459. config XSCALE_PMU
  460. bool
  461. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  462. default y
  463. if !MMU
  464. source "arch/arm/Kconfig-nommu"
  465. endif
  466. endmenu
  467. source "arch/arm/common/Kconfig"
  468. config FORCE_MAX_ZONEORDER
  469. int
  470. depends on SA1111
  471. default "9"
  472. menu "Bus support"
  473. config ARM_AMBA
  474. bool
  475. config ISA
  476. bool
  477. help
  478. Find out whether you have ISA slots on your motherboard. ISA is the
  479. name of a bus system, i.e. the way the CPU talks to the other stuff
  480. inside your box. Other bus systems are PCI, EISA, MicroChannel
  481. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  482. newer boards don't support it. If you have ISA, say Y, otherwise N.
  483. # Select ISA DMA controller support
  484. config ISA_DMA
  485. bool
  486. select ISA_DMA_API
  487. # Select ISA DMA interface
  488. config ISA_DMA_API
  489. bool
  490. config PCI
  491. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  492. help
  493. Find out whether you have a PCI motherboard. PCI is the name of a
  494. bus system, i.e. the way the CPU talks to the other stuff inside
  495. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  496. VESA. If you have PCI, say Y, otherwise N.
  497. config PCI_SYSCALL
  498. def_bool PCI
  499. # Select the host bridge type
  500. config PCI_HOST_VIA82C505
  501. bool
  502. depends on PCI && ARCH_SHARK
  503. default y
  504. config PCI_HOST_ITE8152
  505. bool
  506. depends on PCI && MACH_ARMCORE
  507. default y
  508. select DMABOUNCE
  509. source "drivers/pci/Kconfig"
  510. source "drivers/pcmcia/Kconfig"
  511. endmenu
  512. menu "Kernel Features"
  513. source "kernel/time/Kconfig"
  514. config SMP
  515. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  516. depends on EXPERIMENTAL && REALVIEW_EB_ARM11MP
  517. help
  518. This enables support for systems with more than one CPU. If you have
  519. a system with only one CPU, like most personal computers, say N. If
  520. you have a system with more than one CPU, say Y.
  521. If you say N here, the kernel will run on single and multiprocessor
  522. machines, but will use only one CPU of a multiprocessor machine. If
  523. you say Y here, the kernel will run on many, but not all, single
  524. processor machines. On a single processor machine, the kernel will
  525. run faster if you say N here.
  526. See also <file:Documentation/i386/IO-APIC.txt>,
  527. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  528. <http://www.linuxdoc.org/docs.html#howto>.
  529. If you don't know what to do here, say N.
  530. config NR_CPUS
  531. int "Maximum number of CPUs (2-32)"
  532. range 2 32
  533. depends on SMP
  534. default "4"
  535. config HOTPLUG_CPU
  536. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  537. depends on SMP && HOTPLUG && EXPERIMENTAL
  538. help
  539. Say Y here to experiment with turning CPUs off and on. CPUs
  540. can be controlled through /sys/devices/system/cpu.
  541. config LOCAL_TIMERS
  542. bool "Use local timer interrupts"
  543. depends on SMP && REALVIEW_EB_ARM11MP
  544. default y
  545. help
  546. Enable support for local timers on SMP platforms, rather then the
  547. legacy IPI broadcast method. Local timers allows the system
  548. accounting to be spread across the timer interval, preventing a
  549. "thundering herd" at every timer tick.
  550. config PREEMPT
  551. bool "Preemptible Kernel (EXPERIMENTAL)"
  552. depends on EXPERIMENTAL
  553. help
  554. This option reduces the latency of the kernel when reacting to
  555. real-time or interactive events by allowing a low priority process to
  556. be preempted even if it is in kernel mode executing a system call.
  557. This allows applications to run more reliably even when the system is
  558. under load.
  559. Say Y here if you are building a kernel for a desktop, embedded
  560. or real-time system. Say N if you are unsure.
  561. config NO_IDLE_HZ
  562. bool "Dynamic tick timer"
  563. depends on !GENERIC_CLOCKEVENTS
  564. help
  565. Select this option if you want to disable continuous timer ticks
  566. and have them programmed to occur as required. This option saves
  567. power as the system can remain in idle state for longer.
  568. By default dynamic tick is disabled during the boot, and can be
  569. manually enabled with:
  570. echo 1 > /sys/devices/system/timer/timer0/dyn_tick
  571. Alternatively, if you want dynamic tick automatically enabled
  572. during boot, pass "dyntick=enable" via the kernel command string.
  573. Please note that dynamic tick may affect the accuracy of
  574. timekeeping on some platforms depending on the implementation.
  575. Currently at least OMAP, PXA2xx and SA11x0 platforms are known
  576. to have accurate timekeeping with dynamic tick.
  577. config HZ
  578. int
  579. default 128 if ARCH_L7200
  580. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  581. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  582. default AT91_TIMER_HZ if ARCH_AT91
  583. default 100
  584. config AEABI
  585. bool "Use the ARM EABI to compile the kernel"
  586. help
  587. This option allows for the kernel to be compiled using the latest
  588. ARM ABI (aka EABI). This is only useful if you are using a user
  589. space environment that is also compiled with EABI.
  590. Since there are major incompatibilities between the legacy ABI and
  591. EABI, especially with regard to structure member alignment, this
  592. option also changes the kernel syscall calling convention to
  593. disambiguate both ABIs and allow for backward compatibility support
  594. (selected with CONFIG_OABI_COMPAT).
  595. To use this you need GCC version 4.0.0 or later.
  596. config OABI_COMPAT
  597. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  598. depends on AEABI && EXPERIMENTAL
  599. default y
  600. help
  601. This option preserves the old syscall interface along with the
  602. new (ARM EABI) one. It also provides a compatibility layer to
  603. intercept syscalls that have structure arguments which layout
  604. in memory differs between the legacy ABI and the new ARM EABI
  605. (only for non "thumb" binaries). This option adds a tiny
  606. overhead to all syscalls and produces a slightly larger kernel.
  607. If you know you'll be using only pure EABI user space then you
  608. can say N here. If this option is not selected and you attempt
  609. to execute a legacy ABI binary then the result will be
  610. UNPREDICTABLE (in fact it can be predicted that it won't work
  611. at all). If in doubt say Y.
  612. config ARCH_DISCONTIGMEM_ENABLE
  613. bool
  614. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  615. help
  616. Say Y to support efficient handling of discontiguous physical memory,
  617. for architectures which are either NUMA (Non-Uniform Memory Access)
  618. or have huge holes in the physical address space for other reasons.
  619. See <file:Documentation/vm/numa> for more.
  620. config NODES_SHIFT
  621. int
  622. default "4" if ARCH_LH7A40X
  623. default "2"
  624. depends on NEED_MULTIPLE_NODES
  625. source "mm/Kconfig"
  626. config LEDS
  627. bool "Timer and CPU usage LEDs"
  628. depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
  629. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  630. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  631. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  632. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  633. ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
  634. ARCH_KS8695 || MACH_RD88F5182
  635. help
  636. If you say Y here, the LEDs on your machine will be used
  637. to provide useful information about your current system status.
  638. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  639. be able to select which LEDs are active using the options below. If
  640. you are compiling a kernel for the EBSA-110 or the LART however, the
  641. red LED will simply flash regularly to indicate that the system is
  642. still functional. It is safe to say Y here if you have a CATS
  643. system, but the driver will do nothing.
  644. config LEDS_TIMER
  645. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  646. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  647. || MACH_OMAP_PERSEUS2
  648. depends on LEDS
  649. depends on !GENERIC_CLOCKEVENTS
  650. default y if ARCH_EBSA110
  651. help
  652. If you say Y here, one of the system LEDs (the green one on the
  653. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  654. will flash regularly to indicate that the system is still
  655. operational. This is mainly useful to kernel hackers who are
  656. debugging unstable kernels.
  657. The LART uses the same LED for both Timer LED and CPU usage LED
  658. functions. You may choose to use both, but the Timer LED function
  659. will overrule the CPU usage LED.
  660. config LEDS_CPU
  661. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  662. !ARCH_OMAP) \
  663. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  664. || MACH_OMAP_PERSEUS2
  665. depends on LEDS
  666. help
  667. If you say Y here, the red LED will be used to give a good real
  668. time indication of CPU usage, by lighting whenever the idle task
  669. is not currently executing.
  670. The LART uses the same LED for both Timer LED and CPU usage LED
  671. functions. You may choose to use both, but the Timer LED function
  672. will overrule the CPU usage LED.
  673. config ALIGNMENT_TRAP
  674. bool
  675. depends on CPU_CP15_MMU
  676. default y if !ARCH_EBSA110
  677. help
  678. ARM processors cannot fetch/store information which is not
  679. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  680. address divisible by 4. On 32-bit ARM processors, these non-aligned
  681. fetch/store instructions will be emulated in software if you say
  682. here, which has a severe performance impact. This is necessary for
  683. correct operation of some network protocols. With an IP-only
  684. configuration it is safe to say N, otherwise say Y.
  685. endmenu
  686. menu "Boot options"
  687. # Compressed boot loader in ROM. Yes, we really want to ask about
  688. # TEXT and BSS so we preserve their values in the config files.
  689. config ZBOOT_ROM_TEXT
  690. hex "Compressed ROM boot loader base address"
  691. default "0"
  692. help
  693. The physical address at which the ROM-able zImage is to be
  694. placed in the target. Platforms which normally make use of
  695. ROM-able zImage formats normally set this to a suitable
  696. value in their defconfig file.
  697. If ZBOOT_ROM is not enabled, this has no effect.
  698. config ZBOOT_ROM_BSS
  699. hex "Compressed ROM boot loader BSS address"
  700. default "0"
  701. help
  702. The base address of an area of read/write memory in the target
  703. for the ROM-able zImage which must be available while the
  704. decompressor is running. It must be large enough to hold the
  705. entire decompressed kernel plus an additional 128 KiB.
  706. Platforms which normally make use of ROM-able zImage formats
  707. normally set this to a suitable value in their defconfig file.
  708. If ZBOOT_ROM is not enabled, this has no effect.
  709. config ZBOOT_ROM
  710. bool "Compressed boot loader in ROM/flash"
  711. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  712. help
  713. Say Y here if you intend to execute your compressed kernel image
  714. (zImage) directly from ROM or flash. If unsure, say N.
  715. config CMDLINE
  716. string "Default kernel command string"
  717. default ""
  718. help
  719. On some architectures (EBSA110 and CATS), there is currently no way
  720. for the boot loader to pass arguments to the kernel. For these
  721. architectures, you should supply some command-line options at build
  722. time by entering them here. As a minimum, you should specify the
  723. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  724. config XIP_KERNEL
  725. bool "Kernel Execute-In-Place from ROM"
  726. depends on !ZBOOT_ROM
  727. help
  728. Execute-In-Place allows the kernel to run from non-volatile storage
  729. directly addressable by the CPU, such as NOR flash. This saves RAM
  730. space since the text section of the kernel is not loaded from flash
  731. to RAM. Read-write sections, such as the data section and stack,
  732. are still copied to RAM. The XIP kernel is not compressed since
  733. it has to run directly from flash, so it will take more space to
  734. store it. The flash address used to link the kernel object files,
  735. and for storing it, is configuration dependent. Therefore, if you
  736. say Y here, you must know the proper physical address where to
  737. store the kernel image depending on your own flash memory usage.
  738. Also note that the make target becomes "make xipImage" rather than
  739. "make zImage" or "make Image". The final kernel binary to put in
  740. ROM memory will be arch/arm/boot/xipImage.
  741. If unsure, say N.
  742. config XIP_PHYS_ADDR
  743. hex "XIP Kernel Physical Location"
  744. depends on XIP_KERNEL
  745. default "0x00080000"
  746. help
  747. This is the physical address in your flash memory the kernel will
  748. be linked for and stored to. This address is dependent on your
  749. own flash usage.
  750. config KEXEC
  751. bool "Kexec system call (EXPERIMENTAL)"
  752. depends on EXPERIMENTAL
  753. help
  754. kexec is a system call that implements the ability to shutdown your
  755. current kernel, and to start another kernel. It is like a reboot
  756. but it is independent of the system firmware. And like a reboot
  757. you can start any kernel with it, not just Linux.
  758. It is an ongoing process to be certain the hardware in a machine
  759. is properly shutdown, so do not be surprised if this code does not
  760. initially work for you. It may help to enable device hotplugging
  761. support.
  762. config ATAGS_PROC
  763. bool "Export atags in procfs"
  764. depends on KEXEC
  765. default y
  766. help
  767. Should the atags used to boot the kernel be exported in an "atags"
  768. file in procfs. Useful with kexec.
  769. endmenu
  770. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
  771. menu "CPU Frequency scaling"
  772. source "drivers/cpufreq/Kconfig"
  773. config CPU_FREQ_SA1100
  774. bool
  775. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  776. default y
  777. config CPU_FREQ_SA1110
  778. bool
  779. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  780. default y
  781. config CPU_FREQ_INTEGRATOR
  782. tristate "CPUfreq driver for ARM Integrator CPUs"
  783. depends on ARCH_INTEGRATOR && CPU_FREQ
  784. default y
  785. help
  786. This enables the CPUfreq driver for ARM Integrator CPUs.
  787. For details, take a look at <file:Documentation/cpu-freq>.
  788. If in doubt, say Y.
  789. config CPU_FREQ_IMX
  790. tristate "CPUfreq driver for i.MX CPUs"
  791. depends on ARCH_IMX && CPU_FREQ
  792. default n
  793. help
  794. This enables the CPUfreq driver for i.MX CPUs.
  795. If in doubt, say N.
  796. config CPU_FREQ_PXA
  797. bool
  798. depends on CPU_FREQ && ARCH_PXA && PXA25x
  799. default y
  800. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  801. endmenu
  802. endif
  803. menu "Floating point emulation"
  804. comment "At least one emulation must be selected"
  805. config FPE_NWFPE
  806. bool "NWFPE math emulation"
  807. depends on !AEABI || OABI_COMPAT
  808. ---help---
  809. Say Y to include the NWFPE floating point emulator in the kernel.
  810. This is necessary to run most binaries. Linux does not currently
  811. support floating point hardware so you need to say Y here even if
  812. your machine has an FPA or floating point co-processor podule.
  813. You may say N here if you are going to load the Acorn FPEmulator
  814. early in the bootup.
  815. config FPE_NWFPE_XP
  816. bool "Support extended precision"
  817. depends on FPE_NWFPE
  818. help
  819. Say Y to include 80-bit support in the kernel floating-point
  820. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  821. Note that gcc does not generate 80-bit operations by default,
  822. so in most cases this option only enlarges the size of the
  823. floating point emulator without any good reason.
  824. You almost surely want to say N here.
  825. config FPE_FASTFPE
  826. bool "FastFPE math emulation (EXPERIMENTAL)"
  827. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  828. ---help---
  829. Say Y here to include the FAST floating point emulator in the kernel.
  830. This is an experimental much faster emulator which now also has full
  831. precision for the mantissa. It does not support any exceptions.
  832. It is very simple, and approximately 3-6 times faster than NWFPE.
  833. It should be sufficient for most programs. It may be not suitable
  834. for scientific calculations, but you have to check this for yourself.
  835. If you do not feel you need a faster FP emulation you should better
  836. choose NWFPE.
  837. config VFP
  838. bool "VFP-format floating point maths"
  839. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  840. help
  841. Say Y to include VFP support code in the kernel. This is needed
  842. if your hardware includes a VFP unit.
  843. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  844. release notes and additional status information.
  845. Say N if your target does not have VFP hardware.
  846. config VFPv3
  847. bool
  848. depends on VFP
  849. default y if CPU_V7
  850. config NEON
  851. bool "Advanced SIMD (NEON) Extension support"
  852. depends on VFPv3 && CPU_V7
  853. help
  854. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  855. Extension.
  856. endmenu
  857. menu "Userspace binary formats"
  858. source "fs/Kconfig.binfmt"
  859. config ARTHUR
  860. tristate "RISC OS personality"
  861. depends on !AEABI
  862. help
  863. Say Y here to include the kernel code necessary if you want to run
  864. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  865. experimental; if this sounds frightening, say N and sleep in peace.
  866. You can also say M here to compile this support as a module (which
  867. will be called arthur).
  868. endmenu
  869. menu "Power management options"
  870. source "kernel/power/Kconfig"
  871. config ARCH_SUSPEND_POSSIBLE
  872. def_bool y
  873. endmenu
  874. source "net/Kconfig"
  875. menu "Device Drivers"
  876. source "drivers/base/Kconfig"
  877. source "drivers/connector/Kconfig"
  878. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  879. source "drivers/mtd/Kconfig"
  880. endif
  881. source "drivers/parport/Kconfig"
  882. source "drivers/pnp/Kconfig"
  883. source "drivers/block/Kconfig"
  884. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  885. source "drivers/misc/Kconfig"
  886. source "drivers/ide/Kconfig"
  887. source "drivers/scsi/Kconfig"
  888. source "drivers/ata/Kconfig"
  889. source "drivers/md/Kconfig"
  890. source "drivers/message/fusion/Kconfig"
  891. source "drivers/ieee1394/Kconfig"
  892. source "drivers/message/i2o/Kconfig"
  893. source "drivers/net/Kconfig"
  894. source "drivers/isdn/Kconfig"
  895. # input before char - char/joystick depends on it. As does USB.
  896. source "drivers/input/Kconfig"
  897. source "drivers/char/Kconfig"
  898. source "drivers/i2c/Kconfig"
  899. source "drivers/spi/Kconfig"
  900. source "drivers/gpio/Kconfig"
  901. source "drivers/w1/Kconfig"
  902. source "drivers/power/Kconfig"
  903. source "drivers/hwmon/Kconfig"
  904. source "drivers/watchdog/Kconfig"
  905. source "drivers/ssb/Kconfig"
  906. #source "drivers/l3/Kconfig"
  907. source "drivers/mfd/Kconfig"
  908. source "drivers/media/Kconfig"
  909. source "drivers/video/Kconfig"
  910. source "sound/Kconfig"
  911. source "drivers/hid/Kconfig"
  912. source "drivers/usb/Kconfig"
  913. source "drivers/mmc/Kconfig"
  914. source "drivers/leds/Kconfig"
  915. source "drivers/rtc/Kconfig"
  916. source "drivers/dma/Kconfig"
  917. source "drivers/dca/Kconfig"
  918. endmenu
  919. source "fs/Kconfig"
  920. source "arch/arm/Kconfig.debug"
  921. source "security/Kconfig"
  922. source "crypto/Kconfig"
  923. source "lib/Kconfig"