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_CO285
  185. bool "Co-EBSA285"
  186. select FOOTBRIDGE
  187. select FOOTBRIDGE_ADDIN
  188. help
  189. Support for Intel's EBSA285 companion chip.
  190. config ARCH_EBSA110
  191. bool "EBSA-110"
  192. select ISA
  193. select NO_IOPORT
  194. help
  195. This is an evaluation board for the StrongARM processor available
  196. from Digital. It has limited hardware on-board, including an
  197. Ethernet interface, two PCMCIA sockets, two serial ports and a
  198. parallel port.
  199. config ARCH_EP93XX
  200. bool "EP93xx-based"
  201. select ARM_AMBA
  202. select ARM_VIC
  203. select GENERIC_GPIO
  204. select HAVE_GPIO_LIB
  205. help
  206. This enables support for the Cirrus EP93xx series of CPUs.
  207. config ARCH_FOOTBRIDGE
  208. bool "FootBridge"
  209. select FOOTBRIDGE
  210. help
  211. Support for systems based on the DC21285 companion chip
  212. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  213. config ARCH_NETX
  214. bool "Hilscher NetX based"
  215. select ARM_VIC
  216. help
  217. This enables support for systems based on the Hilscher NetX Soc
  218. config ARCH_H720X
  219. bool "Hynix HMS720x-based"
  220. select ISA_DMA_API
  221. help
  222. This enables support for systems based on the Hynix HMS720x
  223. config ARCH_IMX
  224. bool "IMX"
  225. select GENERIC_GPIO
  226. select GENERIC_TIME
  227. select GENERIC_CLOCKEVENTS
  228. help
  229. Support for Motorola's i.MX family of processors (MX1, MXL).
  230. config ARCH_IOP13XX
  231. bool "IOP13xx-based"
  232. depends on MMU
  233. select PLAT_IOP
  234. select PCI
  235. select ARCH_SUPPORTS_MSI
  236. help
  237. Support for Intel's IOP13XX (XScale) family of processors.
  238. config ARCH_IOP32X
  239. bool "IOP32x-based"
  240. depends on MMU
  241. select PLAT_IOP
  242. select PCI
  243. help
  244. Support for Intel's 80219 and IOP32X (XScale) family of
  245. processors.
  246. config ARCH_IOP33X
  247. bool "IOP33x-based"
  248. depends on MMU
  249. select PLAT_IOP
  250. select PCI
  251. help
  252. Support for Intel's IOP33X (XScale) family of processors.
  253. config ARCH_IXP23XX
  254. bool "IXP23XX-based"
  255. depends on MMU
  256. select PCI
  257. help
  258. Support for Intel's IXP23xx (XScale) family of processors.
  259. config ARCH_IXP2000
  260. bool "IXP2400/2800-based"
  261. depends on MMU
  262. select PCI
  263. help
  264. Support for Intel's IXP2400/2800 (XScale) family of processors.
  265. config ARCH_IXP4XX
  266. bool "IXP4xx-based"
  267. depends on MMU
  268. select GENERIC_GPIO
  269. select GENERIC_TIME
  270. select GENERIC_CLOCKEVENTS
  271. help
  272. Support for Intel's IXP4XX (XScale) family of processors.
  273. config ARCH_L7200
  274. bool "LinkUp-L7200"
  275. select FIQ
  276. help
  277. Say Y here if you intend to run this kernel on a LinkUp Systems
  278. L7200 Software Development Board which uses an ARM720T processor.
  279. Information on this board can be obtained at:
  280. <http://www.linkupsys.com/>
  281. If you have any questions or comments about the Linux kernel port
  282. to this board, send e-mail to <sjhill@cotw.com>.
  283. config ARCH_KS8695
  284. bool "Micrel/Kendin KS8695"
  285. select GENERIC_GPIO
  286. help
  287. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  288. System-on-Chip devices.
  289. config ARCH_NS9XXX
  290. bool "NetSilicon NS9xxx"
  291. select GENERIC_GPIO
  292. select GENERIC_TIME
  293. select GENERIC_CLOCKEVENTS
  294. help
  295. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  296. System.
  297. <http://www.digi.com/products/microprocessors/index.jsp>
  298. config ARCH_MXC
  299. bool "Freescale MXC/iMX-based"
  300. select ARCH_MTD_XIP
  301. help
  302. Support for Freescale MXC/iMX-based family of processors
  303. config ARCH_ORION5X
  304. bool "Marvell Orion"
  305. depends on MMU
  306. select PCI
  307. select GENERIC_GPIO
  308. select GENERIC_TIME
  309. select GENERIC_CLOCKEVENTS
  310. select PLAT_ORION
  311. help
  312. Support for the following Marvell Orion 5x series SoCs:
  313. Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)
  314. config ARCH_PNX4008
  315. bool "Philips Nexperia PNX4008 Mobile"
  316. help
  317. This enables support for Philips PNX4008 mobile platform.
  318. config ARCH_PXA
  319. bool "PXA2xx/PXA3xx-based"
  320. depends on MMU
  321. select ARCH_MTD_XIP
  322. select GENERIC_GPIO
  323. select HAVE_GPIO_LIB
  324. select GENERIC_TIME
  325. select GENERIC_CLOCKEVENTS
  326. select TICK_ONESHOT
  327. help
  328. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  329. config ARCH_RPC
  330. bool "RiscPC"
  331. select ARCH_ACORN
  332. select FIQ
  333. select TIMER_ACORN
  334. select ARCH_MAY_HAVE_PC_FDC
  335. select ISA_DMA_API
  336. select NO_IOPORT
  337. help
  338. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  339. CD-ROM interface, serial and parallel port, and the floppy drive.
  340. config ARCH_SA1100
  341. bool "SA1100-based"
  342. select ISA
  343. select ARCH_DISCONTIGMEM_ENABLE
  344. select ARCH_SPARSEMEM_ENABLE
  345. select ARCH_SELECT_MEMORY_MODEL
  346. select ARCH_MTD_XIP
  347. select GENERIC_GPIO
  348. select GENERIC_TIME
  349. select GENERIC_CLOCKEVENTS
  350. select TICK_ONESHOT
  351. select HAVE_GPIO_LIB
  352. help
  353. Support for StrongARM 11x0 based boards.
  354. config ARCH_S3C2410
  355. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  356. select GENERIC_GPIO
  357. help
  358. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  359. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  360. the Samsung SMDK2410 development board (and derivatives).
  361. config ARCH_SHARK
  362. bool "Shark"
  363. select ISA
  364. select ISA_DMA
  365. select PCI
  366. help
  367. Support for the StrongARM based Digital DNARD machine, also known
  368. as "Shark" (<http://www.shark-linux.de/shark.html>).
  369. config ARCH_LH7A40X
  370. bool "Sharp LH7A40X"
  371. help
  372. Say Y here for systems based on one of the Sharp LH7A40X
  373. System on a Chip processors. These CPUs include an ARM922T
  374. core with a wide array of integrated devices for
  375. hand-held and low-power applications.
  376. config ARCH_DAVINCI
  377. bool "TI DaVinci"
  378. select GENERIC_TIME
  379. select GENERIC_CLOCKEVENTS
  380. select GENERIC_GPIO
  381. help
  382. Support for TI's DaVinci platform.
  383. config ARCH_OMAP
  384. bool "TI OMAP"
  385. select GENERIC_GPIO
  386. select HAVE_GPIO_LIB
  387. select GENERIC_TIME
  388. select GENERIC_CLOCKEVENTS
  389. help
  390. Support for TI's OMAP platform (OMAP1 and OMAP2).
  391. config ARCH_MSM7X00A
  392. bool "Qualcomm MSM7X00A"
  393. select GENERIC_TIME
  394. select GENERIC_CLOCKEVENTS
  395. help
  396. Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
  397. apps processor of the MSM7X00A and depends on a shared memory
  398. interface to the ARM9 modem processor which runs the baseband stack
  399. and controls some vital subsystems (clock and power control, etc).
  400. <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
  401. endchoice
  402. source "arch/arm/mach-clps711x/Kconfig"
  403. source "arch/arm/mach-ep93xx/Kconfig"
  404. source "arch/arm/mach-footbridge/Kconfig"
  405. source "arch/arm/mach-integrator/Kconfig"
  406. source "arch/arm/mach-iop32x/Kconfig"
  407. source "arch/arm/mach-iop33x/Kconfig"
  408. source "arch/arm/mach-iop13xx/Kconfig"
  409. source "arch/arm/mach-ixp4xx/Kconfig"
  410. source "arch/arm/mach-ixp2000/Kconfig"
  411. source "arch/arm/mach-ixp23xx/Kconfig"
  412. source "arch/arm/mach-pxa/Kconfig"
  413. source "arch/arm/mach-sa1100/Kconfig"
  414. source "arch/arm/plat-omap/Kconfig"
  415. source "arch/arm/mach-omap1/Kconfig"
  416. source "arch/arm/mach-omap2/Kconfig"
  417. source "arch/arm/mach-orion5x/Kconfig"
  418. source "arch/arm/plat-s3c24xx/Kconfig"
  419. source "arch/arm/plat-s3c/Kconfig"
  420. if ARCH_S3C2410
  421. source "arch/arm/mach-s3c2400/Kconfig"
  422. source "arch/arm/mach-s3c2410/Kconfig"
  423. source "arch/arm/mach-s3c2412/Kconfig"
  424. source "arch/arm/mach-s3c2440/Kconfig"
  425. source "arch/arm/mach-s3c2442/Kconfig"
  426. source "arch/arm/mach-s3c2443/Kconfig"
  427. endif
  428. source "arch/arm/mach-lh7a40x/Kconfig"
  429. source "arch/arm/mach-imx/Kconfig"
  430. source "arch/arm/mach-h720x/Kconfig"
  431. source "arch/arm/mach-versatile/Kconfig"
  432. source "arch/arm/mach-aaec2000/Kconfig"
  433. source "arch/arm/mach-realview/Kconfig"
  434. source "arch/arm/mach-at91/Kconfig"
  435. source "arch/arm/plat-mxc/Kconfig"
  436. source "arch/arm/mach-netx/Kconfig"
  437. source "arch/arm/mach-ns9xxx/Kconfig"
  438. source "arch/arm/mach-davinci/Kconfig"
  439. source "arch/arm/mach-ks8695/Kconfig"
  440. source "arch/arm/mach-msm/Kconfig"
  441. # Definitions to make life easier
  442. config ARCH_ACORN
  443. bool
  444. config PLAT_IOP
  445. bool
  446. config PLAT_ORION
  447. bool
  448. source arch/arm/mm/Kconfig
  449. config IWMMXT
  450. bool "Enable iWMMXt support"
  451. depends on CPU_XSCALE || CPU_XSC3
  452. default y if PXA27x || PXA3xx
  453. help
  454. Enable support for iWMMXt context switching at run time if
  455. running on a CPU that supports it.
  456. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  457. config XSCALE_PMU
  458. bool
  459. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  460. default y
  461. if !MMU
  462. source "arch/arm/Kconfig-nommu"
  463. endif
  464. endmenu
  465. source "arch/arm/common/Kconfig"
  466. config FORCE_MAX_ZONEORDER
  467. int
  468. depends on SA1111
  469. default "9"
  470. menu "Bus support"
  471. config ARM_AMBA
  472. bool
  473. config ISA
  474. bool
  475. help
  476. Find out whether you have ISA slots on your motherboard. ISA is the
  477. name of a bus system, i.e. the way the CPU talks to the other stuff
  478. inside your box. Other bus systems are PCI, EISA, MicroChannel
  479. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  480. newer boards don't support it. If you have ISA, say Y, otherwise N.
  481. # Select ISA DMA controller support
  482. config ISA_DMA
  483. bool
  484. select ISA_DMA_API
  485. # Select ISA DMA interface
  486. config ISA_DMA_API
  487. bool
  488. config PCI
  489. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  490. help
  491. Find out whether you have a PCI motherboard. PCI is the name of a
  492. bus system, i.e. the way the CPU talks to the other stuff inside
  493. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  494. VESA. If you have PCI, say Y, otherwise N.
  495. config PCI_SYSCALL
  496. def_bool PCI
  497. # Select the host bridge type
  498. config PCI_HOST_VIA82C505
  499. bool
  500. depends on PCI && ARCH_SHARK
  501. default y
  502. config PCI_HOST_ITE8152
  503. bool
  504. depends on PCI && MACH_ARMCORE
  505. default y
  506. select DMABOUNCE
  507. source "drivers/pci/Kconfig"
  508. source "drivers/pcmcia/Kconfig"
  509. endmenu
  510. menu "Kernel Features"
  511. source "kernel/time/Kconfig"
  512. config SMP
  513. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  514. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  515. help
  516. This enables support for systems with more than one CPU. If you have
  517. a system with only one CPU, like most personal computers, say N. If
  518. you have a system with more than one CPU, say Y.
  519. If you say N here, the kernel will run on single and multiprocessor
  520. machines, but will use only one CPU of a multiprocessor machine. If
  521. you say Y here, the kernel will run on many, but not all, single
  522. processor machines. On a single processor machine, the kernel will
  523. run faster if you say N here.
  524. See also <file:Documentation/i386/IO-APIC.txt>,
  525. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  526. <http://www.linuxdoc.org/docs.html#howto>.
  527. If you don't know what to do here, say N.
  528. config NR_CPUS
  529. int "Maximum number of CPUs (2-32)"
  530. range 2 32
  531. depends on SMP
  532. default "4"
  533. config HOTPLUG_CPU
  534. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  535. depends on SMP && HOTPLUG && EXPERIMENTAL
  536. help
  537. Say Y here to experiment with turning CPUs off and on. CPUs
  538. can be controlled through /sys/devices/system/cpu.
  539. config LOCAL_TIMERS
  540. bool "Use local timer interrupts"
  541. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  542. default y
  543. help
  544. Enable support for local timers on SMP platforms, rather then the
  545. legacy IPI broadcast method. Local timers allows the system
  546. accounting to be spread across the timer interval, preventing a
  547. "thundering herd" at every timer tick.
  548. config PREEMPT
  549. bool "Preemptible Kernel (EXPERIMENTAL)"
  550. depends on EXPERIMENTAL
  551. help
  552. This option reduces the latency of the kernel when reacting to
  553. real-time or interactive events by allowing a low priority process to
  554. be preempted even if it is in kernel mode executing a system call.
  555. This allows applications to run more reliably even when the system is
  556. under load.
  557. Say Y here if you are building a kernel for a desktop, embedded
  558. or real-time system. Say N if you are unsure.
  559. config NO_IDLE_HZ
  560. bool "Dynamic tick timer"
  561. depends on !GENERIC_CLOCKEVENTS
  562. help
  563. Select this option if you want to disable continuous timer ticks
  564. and have them programmed to occur as required. This option saves
  565. power as the system can remain in idle state for longer.
  566. By default dynamic tick is disabled during the boot, and can be
  567. manually enabled with:
  568. echo 1 > /sys/devices/system/timer/timer0/dyn_tick
  569. Alternatively, if you want dynamic tick automatically enabled
  570. during boot, pass "dyntick=enable" via the kernel command string.
  571. Please note that dynamic tick may affect the accuracy of
  572. timekeeping on some platforms depending on the implementation.
  573. Currently at least OMAP, PXA2xx and SA11x0 platforms are known
  574. to have accurate timekeeping with dynamic tick.
  575. config HZ
  576. int
  577. default 128 if ARCH_L7200
  578. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  579. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  580. default AT91_TIMER_HZ if ARCH_AT91
  581. default 100
  582. config AEABI
  583. bool "Use the ARM EABI to compile the kernel"
  584. help
  585. This option allows for the kernel to be compiled using the latest
  586. ARM ABI (aka EABI). This is only useful if you are using a user
  587. space environment that is also compiled with EABI.
  588. Since there are major incompatibilities between the legacy ABI and
  589. EABI, especially with regard to structure member alignment, this
  590. option also changes the kernel syscall calling convention to
  591. disambiguate both ABIs and allow for backward compatibility support
  592. (selected with CONFIG_OABI_COMPAT).
  593. To use this you need GCC version 4.0.0 or later.
  594. config OABI_COMPAT
  595. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  596. depends on AEABI && EXPERIMENTAL
  597. default y
  598. help
  599. This option preserves the old syscall interface along with the
  600. new (ARM EABI) one. It also provides a compatibility layer to
  601. intercept syscalls that have structure arguments which layout
  602. in memory differs between the legacy ABI and the new ARM EABI
  603. (only for non "thumb" binaries). This option adds a tiny
  604. overhead to all syscalls and produces a slightly larger kernel.
  605. If you know you'll be using only pure EABI user space then you
  606. can say N here. If this option is not selected and you attempt
  607. to execute a legacy ABI binary then the result will be
  608. UNPREDICTABLE (in fact it can be predicted that it won't work
  609. at all). If in doubt say Y.
  610. config ARCH_DISCONTIGMEM_ENABLE
  611. bool
  612. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  613. help
  614. Say Y to support efficient handling of discontiguous physical memory,
  615. for architectures which are either NUMA (Non-Uniform Memory Access)
  616. or have huge holes in the physical address space for other reasons.
  617. See <file:Documentation/vm/numa> for more.
  618. config ARCH_SPARSEMEM_ENABLE
  619. bool
  620. config ARCH_SELECT_MEMORY_MODEL
  621. bool
  622. config NODES_SHIFT
  623. int
  624. default "4" if ARCH_LH7A40X
  625. default "2"
  626. depends on NEED_MULTIPLE_NODES
  627. source "mm/Kconfig"
  628. config LEDS
  629. bool "Timer and CPU usage LEDs"
  630. depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
  631. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  632. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  633. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  634. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  635. ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
  636. ARCH_KS8695 || MACH_RD88F5182
  637. help
  638. If you say Y here, the LEDs on your machine will be used
  639. to provide useful information about your current system status.
  640. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  641. be able to select which LEDs are active using the options below. If
  642. you are compiling a kernel for the EBSA-110 or the LART however, the
  643. red LED will simply flash regularly to indicate that the system is
  644. still functional. It is safe to say Y here if you have a CATS
  645. system, but the driver will do nothing.
  646. config LEDS_TIMER
  647. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  648. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  649. || MACH_OMAP_PERSEUS2
  650. depends on LEDS
  651. depends on !GENERIC_CLOCKEVENTS
  652. default y if ARCH_EBSA110
  653. help
  654. If you say Y here, one of the system LEDs (the green one on the
  655. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  656. will flash regularly to indicate that the system is still
  657. operational. This is mainly useful to kernel hackers who are
  658. debugging unstable kernels.
  659. The LART uses the same LED for both Timer LED and CPU usage LED
  660. functions. You may choose to use both, but the Timer LED function
  661. will overrule the CPU usage LED.
  662. config LEDS_CPU
  663. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  664. !ARCH_OMAP) \
  665. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  666. || MACH_OMAP_PERSEUS2
  667. depends on LEDS
  668. help
  669. If you say Y here, the red LED will be used to give a good real
  670. time indication of CPU usage, by lighting whenever the idle task
  671. is not currently executing.
  672. The LART uses the same LED for both Timer LED and CPU usage LED
  673. functions. You may choose to use both, but the Timer LED function
  674. will overrule the CPU usage LED.
  675. config ALIGNMENT_TRAP
  676. bool
  677. depends on CPU_CP15_MMU
  678. default y if !ARCH_EBSA110
  679. help
  680. ARM processors cannot fetch/store information which is not
  681. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  682. address divisible by 4. On 32-bit ARM processors, these non-aligned
  683. fetch/store instructions will be emulated in software if you say
  684. here, which has a severe performance impact. This is necessary for
  685. correct operation of some network protocols. With an IP-only
  686. configuration it is safe to say N, otherwise say Y.
  687. endmenu
  688. menu "Boot options"
  689. # Compressed boot loader in ROM. Yes, we really want to ask about
  690. # TEXT and BSS so we preserve their values in the config files.
  691. config ZBOOT_ROM_TEXT
  692. hex "Compressed ROM boot loader base address"
  693. default "0"
  694. help
  695. The physical address at which the ROM-able zImage is to be
  696. placed in the target. Platforms which normally make use of
  697. ROM-able zImage formats normally set this to a suitable
  698. value in their defconfig file.
  699. If ZBOOT_ROM is not enabled, this has no effect.
  700. config ZBOOT_ROM_BSS
  701. hex "Compressed ROM boot loader BSS address"
  702. default "0"
  703. help
  704. The base address of an area of read/write memory in the target
  705. for the ROM-able zImage which must be available while the
  706. decompressor is running. It must be large enough to hold the
  707. entire decompressed kernel plus an additional 128 KiB.
  708. Platforms which normally make use of ROM-able zImage formats
  709. normally set this to a suitable value in their defconfig file.
  710. If ZBOOT_ROM is not enabled, this has no effect.
  711. config ZBOOT_ROM
  712. bool "Compressed boot loader in ROM/flash"
  713. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  714. help
  715. Say Y here if you intend to execute your compressed kernel image
  716. (zImage) directly from ROM or flash. If unsure, say N.
  717. config CMDLINE
  718. string "Default kernel command string"
  719. default ""
  720. help
  721. On some architectures (EBSA110 and CATS), there is currently no way
  722. for the boot loader to pass arguments to the kernel. For these
  723. architectures, you should supply some command-line options at build
  724. time by entering them here. As a minimum, you should specify the
  725. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  726. config XIP_KERNEL
  727. bool "Kernel Execute-In-Place from ROM"
  728. depends on !ZBOOT_ROM
  729. help
  730. Execute-In-Place allows the kernel to run from non-volatile storage
  731. directly addressable by the CPU, such as NOR flash. This saves RAM
  732. space since the text section of the kernel is not loaded from flash
  733. to RAM. Read-write sections, such as the data section and stack,
  734. are still copied to RAM. The XIP kernel is not compressed since
  735. it has to run directly from flash, so it will take more space to
  736. store it. The flash address used to link the kernel object files,
  737. and for storing it, is configuration dependent. Therefore, if you
  738. say Y here, you must know the proper physical address where to
  739. store the kernel image depending on your own flash memory usage.
  740. Also note that the make target becomes "make xipImage" rather than
  741. "make zImage" or "make Image". The final kernel binary to put in
  742. ROM memory will be arch/arm/boot/xipImage.
  743. If unsure, say N.
  744. config XIP_PHYS_ADDR
  745. hex "XIP Kernel Physical Location"
  746. depends on XIP_KERNEL
  747. default "0x00080000"
  748. help
  749. This is the physical address in your flash memory the kernel will
  750. be linked for and stored to. This address is dependent on your
  751. own flash usage.
  752. config KEXEC
  753. bool "Kexec system call (EXPERIMENTAL)"
  754. depends on EXPERIMENTAL
  755. help
  756. kexec is a system call that implements the ability to shutdown your
  757. current kernel, and to start another kernel. It is like a reboot
  758. but it is independent of the system firmware. And like a reboot
  759. you can start any kernel with it, not just Linux.
  760. It is an ongoing process to be certain the hardware in a machine
  761. is properly shutdown, so do not be surprised if this code does not
  762. initially work for you. It may help to enable device hotplugging
  763. support.
  764. config ATAGS_PROC
  765. bool "Export atags in procfs"
  766. depends on KEXEC
  767. default y
  768. help
  769. Should the atags used to boot the kernel be exported in an "atags"
  770. file in procfs. Useful with kexec.
  771. endmenu
  772. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
  773. menu "CPU Frequency scaling"
  774. source "drivers/cpufreq/Kconfig"
  775. config CPU_FREQ_SA1100
  776. bool
  777. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  778. default y
  779. config CPU_FREQ_SA1110
  780. bool
  781. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  782. default y
  783. config CPU_FREQ_INTEGRATOR
  784. tristate "CPUfreq driver for ARM Integrator CPUs"
  785. depends on ARCH_INTEGRATOR && CPU_FREQ
  786. default y
  787. help
  788. This enables the CPUfreq driver for ARM Integrator CPUs.
  789. For details, take a look at <file:Documentation/cpu-freq>.
  790. If in doubt, say Y.
  791. config CPU_FREQ_IMX
  792. tristate "CPUfreq driver for i.MX CPUs"
  793. depends on ARCH_IMX && CPU_FREQ
  794. default n
  795. help
  796. This enables the CPUfreq driver for i.MX CPUs.
  797. If in doubt, say N.
  798. config CPU_FREQ_PXA
  799. bool
  800. depends on CPU_FREQ && ARCH_PXA && PXA25x
  801. default y
  802. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  803. endmenu
  804. endif
  805. menu "Floating point emulation"
  806. comment "At least one emulation must be selected"
  807. config FPE_NWFPE
  808. bool "NWFPE math emulation"
  809. depends on !AEABI || OABI_COMPAT
  810. ---help---
  811. Say Y to include the NWFPE floating point emulator in the kernel.
  812. This is necessary to run most binaries. Linux does not currently
  813. support floating point hardware so you need to say Y here even if
  814. your machine has an FPA or floating point co-processor podule.
  815. You may say N here if you are going to load the Acorn FPEmulator
  816. early in the bootup.
  817. config FPE_NWFPE_XP
  818. bool "Support extended precision"
  819. depends on FPE_NWFPE
  820. help
  821. Say Y to include 80-bit support in the kernel floating-point
  822. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  823. Note that gcc does not generate 80-bit operations by default,
  824. so in most cases this option only enlarges the size of the
  825. floating point emulator without any good reason.
  826. You almost surely want to say N here.
  827. config FPE_FASTFPE
  828. bool "FastFPE math emulation (EXPERIMENTAL)"
  829. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  830. ---help---
  831. Say Y here to include the FAST floating point emulator in the kernel.
  832. This is an experimental much faster emulator which now also has full
  833. precision for the mantissa. It does not support any exceptions.
  834. It is very simple, and approximately 3-6 times faster than NWFPE.
  835. It should be sufficient for most programs. It may be not suitable
  836. for scientific calculations, but you have to check this for yourself.
  837. If you do not feel you need a faster FP emulation you should better
  838. choose NWFPE.
  839. config VFP
  840. bool "VFP-format floating point maths"
  841. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  842. help
  843. Say Y to include VFP support code in the kernel. This is needed
  844. if your hardware includes a VFP unit.
  845. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  846. release notes and additional status information.
  847. Say N if your target does not have VFP hardware.
  848. config VFPv3
  849. bool
  850. depends on VFP
  851. default y if CPU_V7
  852. config NEON
  853. bool "Advanced SIMD (NEON) Extension support"
  854. depends on VFPv3 && CPU_V7
  855. help
  856. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  857. Extension.
  858. endmenu
  859. menu "Userspace binary formats"
  860. source "fs/Kconfig.binfmt"
  861. config ARTHUR
  862. tristate "RISC OS personality"
  863. depends on !AEABI
  864. help
  865. Say Y here to include the kernel code necessary if you want to run
  866. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  867. experimental; if this sounds frightening, say N and sleep in peace.
  868. You can also say M here to compile this support as a module (which
  869. will be called arthur).
  870. endmenu
  871. menu "Power management options"
  872. source "kernel/power/Kconfig"
  873. config ARCH_SUSPEND_POSSIBLE
  874. def_bool y
  875. endmenu
  876. source "net/Kconfig"
  877. menu "Device Drivers"
  878. source "drivers/base/Kconfig"
  879. source "drivers/connector/Kconfig"
  880. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  881. source "drivers/mtd/Kconfig"
  882. endif
  883. source "drivers/parport/Kconfig"
  884. source "drivers/pnp/Kconfig"
  885. source "drivers/block/Kconfig"
  886. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  887. source "drivers/misc/Kconfig"
  888. source "drivers/ide/Kconfig"
  889. source "drivers/scsi/Kconfig"
  890. source "drivers/ata/Kconfig"
  891. source "drivers/md/Kconfig"
  892. source "drivers/message/fusion/Kconfig"
  893. source "drivers/ieee1394/Kconfig"
  894. source "drivers/message/i2o/Kconfig"
  895. source "drivers/net/Kconfig"
  896. source "drivers/isdn/Kconfig"
  897. # input before char - char/joystick depends on it. As does USB.
  898. source "drivers/input/Kconfig"
  899. source "drivers/char/Kconfig"
  900. source "drivers/i2c/Kconfig"
  901. source "drivers/spi/Kconfig"
  902. source "drivers/gpio/Kconfig"
  903. source "drivers/w1/Kconfig"
  904. source "drivers/power/Kconfig"
  905. source "drivers/hwmon/Kconfig"
  906. source "drivers/watchdog/Kconfig"
  907. source "drivers/ssb/Kconfig"
  908. #source "drivers/l3/Kconfig"
  909. source "drivers/mfd/Kconfig"
  910. source "drivers/media/Kconfig"
  911. source "drivers/video/Kconfig"
  912. source "sound/Kconfig"
  913. source "drivers/hid/Kconfig"
  914. source "drivers/usb/Kconfig"
  915. source "drivers/mmc/Kconfig"
  916. source "drivers/leds/Kconfig"
  917. source "drivers/rtc/Kconfig"
  918. source "drivers/dma/Kconfig"
  919. source "drivers/dca/Kconfig"
  920. source "drivers/uio/Kconfig"
  921. endmenu
  922. source "fs/Kconfig"
  923. source "arch/arm/Kconfig.debug"
  924. source "security/Kconfig"
  925. source "crypto/Kconfig"
  926. source "lib/Kconfig"