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. config GENERIC_HARDIRQS_NO__DO_IRQ
  116. bool
  117. def_bool y
  118. if OPROFILE
  119. config OPROFILE_ARMV6
  120. def_bool y
  121. depends on CPU_V6 && !SMP
  122. select OPROFILE_ARM11_CORE
  123. config OPROFILE_MPCORE
  124. def_bool y
  125. depends on CPU_V6 && SMP
  126. select OPROFILE_ARM11_CORE
  127. config OPROFILE_ARM11_CORE
  128. bool
  129. endif
  130. config VECTORS_BASE
  131. hex
  132. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  133. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  134. default 0x00000000
  135. help
  136. The base address of exception vectors.
  137. source "init/Kconfig"
  138. menu "System Type"
  139. choice
  140. prompt "ARM system type"
  141. default ARCH_VERSATILE
  142. config ARCH_AAEC2000
  143. bool "Agilent AAEC-2000 based"
  144. select ARM_AMBA
  145. help
  146. This enables support for systems based on the Agilent AAEC-2000
  147. config ARCH_INTEGRATOR
  148. bool "ARM Ltd. Integrator family"
  149. select ARM_AMBA
  150. select ICST525
  151. help
  152. Support for ARM's Integrator platform.
  153. config ARCH_REALVIEW
  154. bool "ARM Ltd. RealView family"
  155. select ARM_AMBA
  156. select ICST307
  157. select GENERIC_TIME
  158. select GENERIC_CLOCKEVENTS
  159. help
  160. This enables support for ARM Ltd RealView boards.
  161. config ARCH_VERSATILE
  162. bool "ARM Ltd. Versatile family"
  163. select ARM_AMBA
  164. select ARM_VIC
  165. select ICST307
  166. select GENERIC_TIME
  167. select GENERIC_CLOCKEVENTS
  168. help
  169. This enables support for ARM Ltd Versatile board.
  170. config ARCH_AT91
  171. bool "Atmel AT91"
  172. select GENERIC_GPIO
  173. help
  174. This enables support for systems based on the Atmel AT91RM9200,
  175. AT91SAM9 and AT91CAP9 processors.
  176. config ARCH_CLPS7500
  177. bool "Cirrus CL-PS7500FE"
  178. select TIMER_ACORN
  179. select ISA
  180. select NO_IOPORT
  181. help
  182. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  183. config ARCH_CLPS711X
  184. bool "Cirrus Logic CLPS711x/EP721x-based"
  185. help
  186. Support for Cirrus Logic 711x/721x based boards.
  187. config ARCH_CO285
  188. bool "Co-EBSA285"
  189. select FOOTBRIDGE
  190. select FOOTBRIDGE_ADDIN
  191. help
  192. Support for Intel's EBSA285 companion chip.
  193. config ARCH_EBSA110
  194. bool "EBSA-110"
  195. select ISA
  196. select NO_IOPORT
  197. help
  198. This is an evaluation board for the StrongARM processor available
  199. from Digital. It has limited hardware on-board, including an
  200. Ethernet interface, two PCMCIA sockets, two serial ports and a
  201. parallel port.
  202. config ARCH_EP93XX
  203. bool "EP93xx-based"
  204. select ARM_AMBA
  205. select ARM_VIC
  206. select GENERIC_GPIO
  207. select HAVE_GPIO_LIB
  208. help
  209. This enables support for the Cirrus EP93xx series of CPUs.
  210. config ARCH_FOOTBRIDGE
  211. bool "FootBridge"
  212. select FOOTBRIDGE
  213. help
  214. Support for systems based on the DC21285 companion chip
  215. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  216. config ARCH_NETX
  217. bool "Hilscher NetX based"
  218. select ARM_VIC
  219. help
  220. This enables support for systems based on the Hilscher NetX Soc
  221. config ARCH_H720X
  222. bool "Hynix HMS720x-based"
  223. select ISA_DMA_API
  224. help
  225. This enables support for systems based on the Hynix HMS720x
  226. config ARCH_IMX
  227. bool "IMX"
  228. select GENERIC_GPIO
  229. select GENERIC_TIME
  230. select GENERIC_CLOCKEVENTS
  231. help
  232. Support for Motorola's i.MX family of processors (MX1, MXL).
  233. config ARCH_IOP13XX
  234. bool "IOP13xx-based"
  235. depends on MMU
  236. select PLAT_IOP
  237. select PCI
  238. select ARCH_SUPPORTS_MSI
  239. help
  240. Support for Intel's IOP13XX (XScale) family of processors.
  241. config ARCH_IOP32X
  242. bool "IOP32x-based"
  243. depends on MMU
  244. select PLAT_IOP
  245. select PCI
  246. help
  247. Support for Intel's 80219 and IOP32X (XScale) family of
  248. processors.
  249. config ARCH_IOP33X
  250. bool "IOP33x-based"
  251. depends on MMU
  252. select PLAT_IOP
  253. select PCI
  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 PCI
  260. help
  261. Support for Intel's IXP23xx (XScale) family of processors.
  262. config ARCH_IXP2000
  263. bool "IXP2400/2800-based"
  264. depends on MMU
  265. select PCI
  266. help
  267. Support for Intel's IXP2400/2800 (XScale) family of processors.
  268. config ARCH_IXP4XX
  269. bool "IXP4xx-based"
  270. depends on MMU
  271. select GENERIC_GPIO
  272. select GENERIC_TIME
  273. select GENERIC_CLOCKEVENTS
  274. help
  275. Support for Intel's IXP4XX (XScale) family of processors.
  276. config ARCH_L7200
  277. bool "LinkUp-L7200"
  278. select FIQ
  279. help
  280. Say Y here if you intend to run this kernel on a LinkUp Systems
  281. L7200 Software Development Board which uses an ARM720T processor.
  282. Information on this board can be obtained at:
  283. <http://www.linkupsys.com/>
  284. If you have any questions or comments about the Linux kernel port
  285. to this board, send e-mail to <sjhill@cotw.com>.
  286. config ARCH_KS8695
  287. bool "Micrel/Kendin KS8695"
  288. select GENERIC_GPIO
  289. help
  290. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  291. System-on-Chip devices.
  292. config ARCH_NS9XXX
  293. bool "NetSilicon NS9xxx"
  294. select GENERIC_GPIO
  295. select GENERIC_TIME
  296. select GENERIC_CLOCKEVENTS
  297. help
  298. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  299. System.
  300. <http://www.digi.com/products/microprocessors/index.jsp>
  301. config ARCH_MXC
  302. bool "Freescale MXC/iMX-based"
  303. select ARCH_MTD_XIP
  304. help
  305. Support for Freescale MXC/iMX-based family of processors
  306. config ARCH_ORION5X
  307. bool "Marvell Orion"
  308. depends on MMU
  309. select PCI
  310. select GENERIC_GPIO
  311. select GENERIC_TIME
  312. select GENERIC_CLOCKEVENTS
  313. select PLAT_ORION
  314. help
  315. Support for the following Marvell Orion 5x series SoCs:
  316. Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)
  317. config ARCH_PNX4008
  318. bool "Philips Nexperia PNX4008 Mobile"
  319. help
  320. This enables support for Philips PNX4008 mobile platform.
  321. config ARCH_PXA
  322. bool "PXA2xx/PXA3xx-based"
  323. depends on MMU
  324. select ARCH_MTD_XIP
  325. select GENERIC_GPIO
  326. select HAVE_GPIO_LIB
  327. select GENERIC_TIME
  328. select GENERIC_CLOCKEVENTS
  329. select TICK_ONESHOT
  330. help
  331. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  332. config ARCH_RPC
  333. bool "RiscPC"
  334. select ARCH_ACORN
  335. select FIQ
  336. select TIMER_ACORN
  337. select ARCH_MAY_HAVE_PC_FDC
  338. select ISA_DMA_API
  339. select NO_IOPORT
  340. help
  341. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  342. CD-ROM interface, serial and parallel port, and the floppy drive.
  343. config ARCH_SA1100
  344. bool "SA1100-based"
  345. select ISA
  346. select ARCH_DISCONTIGMEM_ENABLE
  347. select ARCH_SPARSEMEM_ENABLE
  348. select ARCH_SELECT_MEMORY_MODEL
  349. select ARCH_MTD_XIP
  350. select GENERIC_GPIO
  351. select GENERIC_TIME
  352. select GENERIC_CLOCKEVENTS
  353. select TICK_ONESHOT
  354. select HAVE_GPIO_LIB
  355. help
  356. Support for StrongARM 11x0 based boards.
  357. config ARCH_S3C2410
  358. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  359. select GENERIC_GPIO
  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 ISA
  367. select ISA_DMA
  368. select PCI
  369. help
  370. Support for the StrongARM based Digital DNARD machine, also known
  371. as "Shark" (<http://www.shark-linux.de/shark.html>).
  372. config ARCH_LH7A40X
  373. bool "Sharp LH7A40X"
  374. help
  375. Say Y here for systems based on one of the Sharp LH7A40X
  376. System on a Chip processors. These CPUs include an ARM922T
  377. core with a wide array of integrated devices for
  378. hand-held and low-power applications.
  379. config ARCH_DAVINCI
  380. bool "TI DaVinci"
  381. select GENERIC_TIME
  382. select GENERIC_CLOCKEVENTS
  383. select GENERIC_GPIO
  384. help
  385. Support for TI's DaVinci platform.
  386. config ARCH_OMAP
  387. bool "TI OMAP"
  388. select GENERIC_GPIO
  389. select HAVE_GPIO_LIB
  390. select GENERIC_TIME
  391. select GENERIC_CLOCKEVENTS
  392. help
  393. Support for TI's OMAP platform (OMAP1 and OMAP2).
  394. config ARCH_MSM7X00A
  395. bool "Qualcomm MSM7X00A"
  396. select GENERIC_TIME
  397. select GENERIC_CLOCKEVENTS
  398. help
  399. Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
  400. apps processor of the MSM7X00A and depends on a shared memory
  401. interface to the ARM9 modem processor which runs the baseband stack
  402. and controls some vital subsystems (clock and power control, etc).
  403. <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
  404. endchoice
  405. source "arch/arm/mach-clps711x/Kconfig"
  406. source "arch/arm/mach-ep93xx/Kconfig"
  407. source "arch/arm/mach-footbridge/Kconfig"
  408. source "arch/arm/mach-integrator/Kconfig"
  409. source "arch/arm/mach-iop32x/Kconfig"
  410. source "arch/arm/mach-iop33x/Kconfig"
  411. source "arch/arm/mach-iop13xx/Kconfig"
  412. source "arch/arm/mach-ixp4xx/Kconfig"
  413. source "arch/arm/mach-ixp2000/Kconfig"
  414. source "arch/arm/mach-ixp23xx/Kconfig"
  415. source "arch/arm/mach-pxa/Kconfig"
  416. source "arch/arm/mach-sa1100/Kconfig"
  417. source "arch/arm/plat-omap/Kconfig"
  418. source "arch/arm/mach-omap1/Kconfig"
  419. source "arch/arm/mach-omap2/Kconfig"
  420. source "arch/arm/mach-orion5x/Kconfig"
  421. source "arch/arm/plat-s3c24xx/Kconfig"
  422. source "arch/arm/plat-s3c/Kconfig"
  423. if ARCH_S3C2410
  424. source "arch/arm/mach-s3c2400/Kconfig"
  425. source "arch/arm/mach-s3c2410/Kconfig"
  426. source "arch/arm/mach-s3c2412/Kconfig"
  427. source "arch/arm/mach-s3c2440/Kconfig"
  428. source "arch/arm/mach-s3c2442/Kconfig"
  429. source "arch/arm/mach-s3c2443/Kconfig"
  430. endif
  431. source "arch/arm/mach-lh7a40x/Kconfig"
  432. source "arch/arm/mach-imx/Kconfig"
  433. source "arch/arm/mach-h720x/Kconfig"
  434. source "arch/arm/mach-versatile/Kconfig"
  435. source "arch/arm/mach-aaec2000/Kconfig"
  436. source "arch/arm/mach-realview/Kconfig"
  437. source "arch/arm/mach-at91/Kconfig"
  438. source "arch/arm/plat-mxc/Kconfig"
  439. source "arch/arm/mach-netx/Kconfig"
  440. source "arch/arm/mach-ns9xxx/Kconfig"
  441. source "arch/arm/mach-davinci/Kconfig"
  442. source "arch/arm/mach-ks8695/Kconfig"
  443. source "arch/arm/mach-msm/Kconfig"
  444. # Definitions to make life easier
  445. config ARCH_ACORN
  446. bool
  447. config PLAT_IOP
  448. bool
  449. config PLAT_ORION
  450. bool
  451. source arch/arm/mm/Kconfig
  452. config IWMMXT
  453. bool "Enable iWMMXt support"
  454. depends on CPU_XSCALE || CPU_XSC3
  455. default y if PXA27x || PXA3xx
  456. help
  457. Enable support for iWMMXt context switching at run time if
  458. running on a CPU that supports it.
  459. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  460. config XSCALE_PMU
  461. bool
  462. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  463. default y
  464. if !MMU
  465. source "arch/arm/Kconfig-nommu"
  466. endif
  467. endmenu
  468. source "arch/arm/common/Kconfig"
  469. config FORCE_MAX_ZONEORDER
  470. int
  471. depends on SA1111
  472. default "9"
  473. menu "Bus support"
  474. config ARM_AMBA
  475. bool
  476. config ISA
  477. bool
  478. help
  479. Find out whether you have ISA slots on your motherboard. ISA is the
  480. name of a bus system, i.e. the way the CPU talks to the other stuff
  481. inside your box. Other bus systems are PCI, EISA, MicroChannel
  482. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  483. newer boards don't support it. If you have ISA, say Y, otherwise N.
  484. # Select ISA DMA controller support
  485. config ISA_DMA
  486. bool
  487. select ISA_DMA_API
  488. # Select ISA DMA interface
  489. config ISA_DMA_API
  490. bool
  491. config PCI
  492. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  493. help
  494. Find out whether you have a PCI motherboard. PCI is the name of a
  495. bus system, i.e. the way the CPU talks to the other stuff inside
  496. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  497. VESA. If you have PCI, say Y, otherwise N.
  498. config PCI_SYSCALL
  499. def_bool PCI
  500. # Select the host bridge type
  501. config PCI_HOST_VIA82C505
  502. bool
  503. depends on PCI && ARCH_SHARK
  504. default y
  505. config PCI_HOST_ITE8152
  506. bool
  507. depends on PCI && MACH_ARMCORE
  508. default y
  509. select DMABOUNCE
  510. source "drivers/pci/Kconfig"
  511. source "drivers/pcmcia/Kconfig"
  512. endmenu
  513. menu "Kernel Features"
  514. source "kernel/time/Kconfig"
  515. config SMP
  516. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  517. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  518. help
  519. This enables support for systems with more than one CPU. If you have
  520. a system with only one CPU, like most personal computers, say N. If
  521. you have a system with more than one CPU, say Y.
  522. If you say N here, the kernel will run on single and multiprocessor
  523. machines, but will use only one CPU of a multiprocessor machine. If
  524. you say Y here, the kernel will run on many, but not all, single
  525. processor machines. On a single processor machine, the kernel will
  526. run faster if you say N here.
  527. See also <file:Documentation/i386/IO-APIC.txt>,
  528. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  529. <http://www.linuxdoc.org/docs.html#howto>.
  530. If you don't know what to do here, say N.
  531. config NR_CPUS
  532. int "Maximum number of CPUs (2-32)"
  533. range 2 32
  534. depends on SMP
  535. default "4"
  536. config HOTPLUG_CPU
  537. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  538. depends on SMP && HOTPLUG && EXPERIMENTAL
  539. help
  540. Say Y here to experiment with turning CPUs off and on. CPUs
  541. can be controlled through /sys/devices/system/cpu.
  542. config LOCAL_TIMERS
  543. bool "Use local timer interrupts"
  544. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
  545. default y
  546. help
  547. Enable support for local timers on SMP platforms, rather then the
  548. legacy IPI broadcast method. Local timers allows the system
  549. accounting to be spread across the timer interval, preventing a
  550. "thundering herd" at every timer tick.
  551. config PREEMPT
  552. bool "Preemptible Kernel (EXPERIMENTAL)"
  553. depends on EXPERIMENTAL
  554. help
  555. This option reduces the latency of the kernel when reacting to
  556. real-time or interactive events by allowing a low priority process to
  557. be preempted even if it is in kernel mode executing a system call.
  558. This allows applications to run more reliably even when the system is
  559. under load.
  560. Say Y here if you are building a kernel for a desktop, embedded
  561. or real-time system. Say N if you are unsure.
  562. config NO_IDLE_HZ
  563. bool "Dynamic tick timer"
  564. depends on !GENERIC_CLOCKEVENTS
  565. help
  566. Select this option if you want to disable continuous timer ticks
  567. and have them programmed to occur as required. This option saves
  568. power as the system can remain in idle state for longer.
  569. By default dynamic tick is disabled during the boot, and can be
  570. manually enabled with:
  571. echo 1 > /sys/devices/system/timer/timer0/dyn_tick
  572. Alternatively, if you want dynamic tick automatically enabled
  573. during boot, pass "dyntick=enable" via the kernel command string.
  574. Please note that dynamic tick may affect the accuracy of
  575. timekeeping on some platforms depending on the implementation.
  576. Currently at least OMAP, PXA2xx and SA11x0 platforms are known
  577. to have accurate timekeeping with dynamic tick.
  578. config HZ
  579. int
  580. default 128 if ARCH_L7200
  581. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  582. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  583. default AT91_TIMER_HZ if ARCH_AT91
  584. default 100
  585. config AEABI
  586. bool "Use the ARM EABI to compile the kernel"
  587. help
  588. This option allows for the kernel to be compiled using the latest
  589. ARM ABI (aka EABI). This is only useful if you are using a user
  590. space environment that is also compiled with EABI.
  591. Since there are major incompatibilities between the legacy ABI and
  592. EABI, especially with regard to structure member alignment, this
  593. option also changes the kernel syscall calling convention to
  594. disambiguate both ABIs and allow for backward compatibility support
  595. (selected with CONFIG_OABI_COMPAT).
  596. To use this you need GCC version 4.0.0 or later.
  597. config OABI_COMPAT
  598. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  599. depends on AEABI && EXPERIMENTAL
  600. default y
  601. help
  602. This option preserves the old syscall interface along with the
  603. new (ARM EABI) one. It also provides a compatibility layer to
  604. intercept syscalls that have structure arguments which layout
  605. in memory differs between the legacy ABI and the new ARM EABI
  606. (only for non "thumb" binaries). This option adds a tiny
  607. overhead to all syscalls and produces a slightly larger kernel.
  608. If you know you'll be using only pure EABI user space then you
  609. can say N here. If this option is not selected and you attempt
  610. to execute a legacy ABI binary then the result will be
  611. UNPREDICTABLE (in fact it can be predicted that it won't work
  612. at all). If in doubt say Y.
  613. config ARCH_DISCONTIGMEM_ENABLE
  614. bool
  615. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  616. help
  617. Say Y to support efficient handling of discontiguous physical memory,
  618. for architectures which are either NUMA (Non-Uniform Memory Access)
  619. or have huge holes in the physical address space for other reasons.
  620. See <file:Documentation/vm/numa> for more.
  621. config ARCH_SPARSEMEM_ENABLE
  622. bool
  623. config ARCH_SELECT_MEMORY_MODEL
  624. bool
  625. config NODES_SHIFT
  626. int
  627. default "4" if ARCH_LH7A40X
  628. default "2"
  629. depends on NEED_MULTIPLE_NODES
  630. source "mm/Kconfig"
  631. config LEDS
  632. bool "Timer and CPU usage LEDs"
  633. depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
  634. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  635. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  636. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  637. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  638. ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
  639. ARCH_KS8695 || MACH_RD88F5182
  640. help
  641. If you say Y here, the LEDs on your machine will be used
  642. to provide useful information about your current system status.
  643. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  644. be able to select which LEDs are active using the options below. If
  645. you are compiling a kernel for the EBSA-110 or the LART however, the
  646. red LED will simply flash regularly to indicate that the system is
  647. still functional. It is safe to say Y here if you have a CATS
  648. system, but the driver will do nothing.
  649. config LEDS_TIMER
  650. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  651. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  652. || MACH_OMAP_PERSEUS2
  653. depends on LEDS
  654. depends on !GENERIC_CLOCKEVENTS
  655. default y if ARCH_EBSA110
  656. help
  657. If you say Y here, one of the system LEDs (the green one on the
  658. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  659. will flash regularly to indicate that the system is still
  660. operational. This is mainly useful to kernel hackers who are
  661. debugging unstable kernels.
  662. The LART uses the same LED for both Timer LED and CPU usage LED
  663. functions. You may choose to use both, but the Timer LED function
  664. will overrule the CPU usage LED.
  665. config LEDS_CPU
  666. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  667. !ARCH_OMAP) \
  668. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  669. || MACH_OMAP_PERSEUS2
  670. depends on LEDS
  671. help
  672. If you say Y here, the red LED will be used to give a good real
  673. time indication of CPU usage, by lighting whenever the idle task
  674. is not currently executing.
  675. The LART uses the same LED for both Timer LED and CPU usage LED
  676. functions. You may choose to use both, but the Timer LED function
  677. will overrule the CPU usage LED.
  678. config ALIGNMENT_TRAP
  679. bool
  680. depends on CPU_CP15_MMU
  681. default y if !ARCH_EBSA110
  682. help
  683. ARM processors cannot fetch/store information which is not
  684. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  685. address divisible by 4. On 32-bit ARM processors, these non-aligned
  686. fetch/store instructions will be emulated in software if you say
  687. here, which has a severe performance impact. This is necessary for
  688. correct operation of some network protocols. With an IP-only
  689. configuration it is safe to say N, otherwise say Y.
  690. endmenu
  691. menu "Boot options"
  692. # Compressed boot loader in ROM. Yes, we really want to ask about
  693. # TEXT and BSS so we preserve their values in the config files.
  694. config ZBOOT_ROM_TEXT
  695. hex "Compressed ROM boot loader base address"
  696. default "0"
  697. help
  698. The physical address at which the ROM-able zImage is to be
  699. placed in the target. Platforms which normally make use of
  700. ROM-able zImage formats normally set this to a suitable
  701. value in their defconfig file.
  702. If ZBOOT_ROM is not enabled, this has no effect.
  703. config ZBOOT_ROM_BSS
  704. hex "Compressed ROM boot loader BSS address"
  705. default "0"
  706. help
  707. The base address of an area of read/write memory in the target
  708. for the ROM-able zImage which must be available while the
  709. decompressor is running. It must be large enough to hold the
  710. entire decompressed kernel plus an additional 128 KiB.
  711. Platforms which normally make use of ROM-able zImage formats
  712. normally set this to a suitable value in their defconfig file.
  713. If ZBOOT_ROM is not enabled, this has no effect.
  714. config ZBOOT_ROM
  715. bool "Compressed boot loader in ROM/flash"
  716. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  717. help
  718. Say Y here if you intend to execute your compressed kernel image
  719. (zImage) directly from ROM or flash. If unsure, say N.
  720. config CMDLINE
  721. string "Default kernel command string"
  722. default ""
  723. help
  724. On some architectures (EBSA110 and CATS), there is currently no way
  725. for the boot loader to pass arguments to the kernel. For these
  726. architectures, you should supply some command-line options at build
  727. time by entering them here. As a minimum, you should specify the
  728. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  729. config XIP_KERNEL
  730. bool "Kernel Execute-In-Place from ROM"
  731. depends on !ZBOOT_ROM
  732. help
  733. Execute-In-Place allows the kernel to run from non-volatile storage
  734. directly addressable by the CPU, such as NOR flash. This saves RAM
  735. space since the text section of the kernel is not loaded from flash
  736. to RAM. Read-write sections, such as the data section and stack,
  737. are still copied to RAM. The XIP kernel is not compressed since
  738. it has to run directly from flash, so it will take more space to
  739. store it. The flash address used to link the kernel object files,
  740. and for storing it, is configuration dependent. Therefore, if you
  741. say Y here, you must know the proper physical address where to
  742. store the kernel image depending on your own flash memory usage.
  743. Also note that the make target becomes "make xipImage" rather than
  744. "make zImage" or "make Image". The final kernel binary to put in
  745. ROM memory will be arch/arm/boot/xipImage.
  746. If unsure, say N.
  747. config XIP_PHYS_ADDR
  748. hex "XIP Kernel Physical Location"
  749. depends on XIP_KERNEL
  750. default "0x00080000"
  751. help
  752. This is the physical address in your flash memory the kernel will
  753. be linked for and stored to. This address is dependent on your
  754. own flash usage.
  755. config KEXEC
  756. bool "Kexec system call (EXPERIMENTAL)"
  757. depends on EXPERIMENTAL
  758. help
  759. kexec is a system call that implements the ability to shutdown your
  760. current kernel, and to start another kernel. It is like a reboot
  761. but it is independent of the system firmware. And like a reboot
  762. you can start any kernel with it, not just Linux.
  763. It is an ongoing process to be certain the hardware in a machine
  764. is properly shutdown, so do not be surprised if this code does not
  765. initially work for you. It may help to enable device hotplugging
  766. support.
  767. config ATAGS_PROC
  768. bool "Export atags in procfs"
  769. depends on KEXEC
  770. default y
  771. help
  772. Should the atags used to boot the kernel be exported in an "atags"
  773. file in procfs. Useful with kexec.
  774. endmenu
  775. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
  776. menu "CPU Frequency scaling"
  777. source "drivers/cpufreq/Kconfig"
  778. config CPU_FREQ_SA1100
  779. bool
  780. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  781. default y
  782. config CPU_FREQ_SA1110
  783. bool
  784. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  785. default y
  786. config CPU_FREQ_INTEGRATOR
  787. tristate "CPUfreq driver for ARM Integrator CPUs"
  788. depends on ARCH_INTEGRATOR && CPU_FREQ
  789. default y
  790. help
  791. This enables the CPUfreq driver for ARM Integrator CPUs.
  792. For details, take a look at <file:Documentation/cpu-freq>.
  793. If in doubt, say Y.
  794. config CPU_FREQ_IMX
  795. tristate "CPUfreq driver for i.MX CPUs"
  796. depends on ARCH_IMX && CPU_FREQ
  797. default n
  798. help
  799. This enables the CPUfreq driver for i.MX CPUs.
  800. If in doubt, say N.
  801. config CPU_FREQ_PXA
  802. bool
  803. depends on CPU_FREQ && ARCH_PXA && PXA25x
  804. default y
  805. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  806. endmenu
  807. endif
  808. menu "Floating point emulation"
  809. comment "At least one emulation must be selected"
  810. config FPE_NWFPE
  811. bool "NWFPE math emulation"
  812. depends on !AEABI || OABI_COMPAT
  813. ---help---
  814. Say Y to include the NWFPE floating point emulator in the kernel.
  815. This is necessary to run most binaries. Linux does not currently
  816. support floating point hardware so you need to say Y here even if
  817. your machine has an FPA or floating point co-processor podule.
  818. You may say N here if you are going to load the Acorn FPEmulator
  819. early in the bootup.
  820. config FPE_NWFPE_XP
  821. bool "Support extended precision"
  822. depends on FPE_NWFPE
  823. help
  824. Say Y to include 80-bit support in the kernel floating-point
  825. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  826. Note that gcc does not generate 80-bit operations by default,
  827. so in most cases this option only enlarges the size of the
  828. floating point emulator without any good reason.
  829. You almost surely want to say N here.
  830. config FPE_FASTFPE
  831. bool "FastFPE math emulation (EXPERIMENTAL)"
  832. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  833. ---help---
  834. Say Y here to include the FAST floating point emulator in the kernel.
  835. This is an experimental much faster emulator which now also has full
  836. precision for the mantissa. It does not support any exceptions.
  837. It is very simple, and approximately 3-6 times faster than NWFPE.
  838. It should be sufficient for most programs. It may be not suitable
  839. for scientific calculations, but you have to check this for yourself.
  840. If you do not feel you need a faster FP emulation you should better
  841. choose NWFPE.
  842. config VFP
  843. bool "VFP-format floating point maths"
  844. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  845. help
  846. Say Y to include VFP support code in the kernel. This is needed
  847. if your hardware includes a VFP unit.
  848. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  849. release notes and additional status information.
  850. Say N if your target does not have VFP hardware.
  851. config VFPv3
  852. bool
  853. depends on VFP
  854. default y if CPU_V7
  855. config NEON
  856. bool "Advanced SIMD (NEON) Extension support"
  857. depends on VFPv3 && CPU_V7
  858. help
  859. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  860. Extension.
  861. endmenu
  862. menu "Userspace binary formats"
  863. source "fs/Kconfig.binfmt"
  864. config ARTHUR
  865. tristate "RISC OS personality"
  866. depends on !AEABI
  867. help
  868. Say Y here to include the kernel code necessary if you want to run
  869. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  870. experimental; if this sounds frightening, say N and sleep in peace.
  871. You can also say M here to compile this support as a module (which
  872. will be called arthur).
  873. endmenu
  874. menu "Power management options"
  875. source "kernel/power/Kconfig"
  876. config ARCH_SUSPEND_POSSIBLE
  877. def_bool y
  878. endmenu
  879. source "net/Kconfig"
  880. menu "Device Drivers"
  881. source "drivers/base/Kconfig"
  882. source "drivers/connector/Kconfig"
  883. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  884. source "drivers/mtd/Kconfig"
  885. endif
  886. source "drivers/parport/Kconfig"
  887. source "drivers/pnp/Kconfig"
  888. source "drivers/block/Kconfig"
  889. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  890. source "drivers/misc/Kconfig"
  891. source "drivers/ide/Kconfig"
  892. source "drivers/scsi/Kconfig"
  893. source "drivers/ata/Kconfig"
  894. source "drivers/md/Kconfig"
  895. source "drivers/message/fusion/Kconfig"
  896. source "drivers/ieee1394/Kconfig"
  897. source "drivers/message/i2o/Kconfig"
  898. source "drivers/net/Kconfig"
  899. source "drivers/isdn/Kconfig"
  900. # input before char - char/joystick depends on it. As does USB.
  901. source "drivers/input/Kconfig"
  902. source "drivers/char/Kconfig"
  903. source "drivers/i2c/Kconfig"
  904. source "drivers/spi/Kconfig"
  905. source "drivers/gpio/Kconfig"
  906. source "drivers/w1/Kconfig"
  907. source "drivers/power/Kconfig"
  908. source "drivers/hwmon/Kconfig"
  909. source "drivers/watchdog/Kconfig"
  910. source "drivers/ssb/Kconfig"
  911. #source "drivers/l3/Kconfig"
  912. source "drivers/mfd/Kconfig"
  913. source "drivers/media/Kconfig"
  914. source "drivers/video/Kconfig"
  915. source "sound/Kconfig"
  916. source "drivers/hid/Kconfig"
  917. source "drivers/usb/Kconfig"
  918. source "drivers/mmc/Kconfig"
  919. source "drivers/leds/Kconfig"
  920. source "drivers/rtc/Kconfig"
  921. source "drivers/dma/Kconfig"
  922. source "drivers/dca/Kconfig"
  923. source "drivers/uio/Kconfig"
  924. endmenu
  925. source "fs/Kconfig"
  926. source "arch/arm/Kconfig.debug"
  927. source "security/Kconfig"
  928. source "crypto/Kconfig"
  929. source "lib/Kconfig"