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. select HAVE_FTRACE if (!XIP_KERNEL)
  16. select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
  17. help
  18. The ARM series is a line of low-power-consumption RISC chip designs
  19. licensed by ARM Ltd and targeted at embedded applications and
  20. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  21. manufactured, but legacy ARM-based PC hardware remains popular in
  22. Europe. There is an ARM Linux project with a web page at
  23. <http://www.arm.linux.org.uk/>.
  24. config SYS_SUPPORTS_APM_EMULATION
  25. bool
  26. config GENERIC_GPIO
  27. bool
  28. default n
  29. config GENERIC_TIME
  30. bool
  31. default n
  32. config GENERIC_CLOCKEVENTS
  33. bool
  34. default n
  35. config GENERIC_CLOCKEVENTS_BROADCAST
  36. bool
  37. depends on GENERIC_CLOCKEVENTS
  38. default y if SMP && !LOCAL_TIMERS
  39. config MMU
  40. bool
  41. default y
  42. config NO_IOPORT
  43. bool
  44. default n
  45. config EISA
  46. bool
  47. ---help---
  48. The Extended Industry Standard Architecture (EISA) bus was
  49. developed as an open alternative to the IBM MicroChannel bus.
  50. The EISA bus provided some of the features of the IBM MicroChannel
  51. bus while maintaining backward compatibility with cards made for
  52. the older ISA bus. The EISA bus saw limited use between 1988 and
  53. 1995 when it was made obsolete by the PCI bus.
  54. Say Y here if you are building a kernel for an EISA-based machine.
  55. Otherwise, say N.
  56. config SBUS
  57. bool
  58. config MCA
  59. bool
  60. help
  61. MicroChannel Architecture is found in some IBM PS/2 machines and
  62. laptops. It is a bus system similar to PCI or ISA. See
  63. <file:Documentation/mca.txt> (and especially the web page given
  64. there) before attempting to build an MCA bus kernel.
  65. config GENERIC_HARDIRQS
  66. bool
  67. default y
  68. config STACKTRACE_SUPPORT
  69. bool
  70. default y
  71. config LOCKDEP_SUPPORT
  72. bool
  73. default y
  74. config TRACE_IRQFLAGS_SUPPORT
  75. bool
  76. default y
  77. config HARDIRQS_SW_RESEND
  78. bool
  79. default y
  80. config GENERIC_IRQ_PROBE
  81. bool
  82. default y
  83. config GENERIC_LOCKBREAK
  84. bool
  85. default y
  86. depends on SMP && PREEMPT
  87. config RWSEM_GENERIC_SPINLOCK
  88. bool
  89. default y
  90. config RWSEM_XCHGADD_ALGORITHM
  91. bool
  92. config ARCH_HAS_ILOG2_U32
  93. bool
  94. default n
  95. config ARCH_HAS_ILOG2_U64
  96. bool
  97. default n
  98. config GENERIC_HWEIGHT
  99. bool
  100. default y
  101. config GENERIC_CALIBRATE_DELAY
  102. bool
  103. default y
  104. config ARCH_SUPPORTS_AOUT
  105. def_bool y
  106. config ARCH_MAY_HAVE_PC_FDC
  107. bool
  108. config ZONE_DMA
  109. bool
  110. default y
  111. config GENERIC_ISA_DMA
  112. bool
  113. config FIQ
  114. bool
  115. config ARCH_MTD_XIP
  116. bool
  117. if OPROFILE
  118. config OPROFILE_ARMV6
  119. def_bool y
  120. depends on CPU_V6 && !SMP
  121. select OPROFILE_ARM11_CORE
  122. config OPROFILE_MPCORE
  123. def_bool y
  124. depends on CPU_V6 && SMP
  125. select OPROFILE_ARM11_CORE
  126. config OPROFILE_ARM11_CORE
  127. bool
  128. endif
  129. config VECTORS_BASE
  130. hex
  131. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  132. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  133. default 0x00000000
  134. help
  135. The base address of exception vectors.
  136. source "init/Kconfig"
  137. menu "System Type"
  138. choice
  139. prompt "ARM system type"
  140. default ARCH_VERSATILE
  141. config ARCH_AAEC2000
  142. bool "Agilent AAEC-2000 based"
  143. select ARM_AMBA
  144. help
  145. This enables support for systems based on the Agilent AAEC-2000
  146. config ARCH_INTEGRATOR
  147. bool "ARM Ltd. Integrator family"
  148. select ARM_AMBA
  149. select ICST525
  150. help
  151. Support for ARM's Integrator platform.
  152. config ARCH_REALVIEW
  153. bool "ARM Ltd. RealView family"
  154. select ARM_AMBA
  155. select ICST307
  156. select GENERIC_TIME
  157. select GENERIC_CLOCKEVENTS
  158. help
  159. This enables support for ARM Ltd RealView boards.
  160. config ARCH_VERSATILE
  161. bool "ARM Ltd. Versatile family"
  162. select ARM_AMBA
  163. select ARM_VIC
  164. select ICST307
  165. select GENERIC_TIME
  166. select GENERIC_CLOCKEVENTS
  167. help
  168. This enables support for ARM Ltd Versatile board.
  169. config ARCH_AT91
  170. bool "Atmel AT91"
  171. select GENERIC_GPIO
  172. help
  173. This enables support for systems based on the Atmel AT91RM9200,
  174. AT91SAM9 and AT91CAP9 processors.
  175. config ARCH_CLPS7500
  176. bool "Cirrus CL-PS7500FE"
  177. select TIMER_ACORN
  178. select ISA
  179. select NO_IOPORT
  180. help
  181. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  182. config ARCH_CLPS711X
  183. bool "Cirrus Logic CLPS711x/EP721x-based"
  184. help
  185. Support for Cirrus Logic 711x/721x based boards.
  186. config ARCH_CO285
  187. bool "Co-EBSA285"
  188. select FOOTBRIDGE
  189. select FOOTBRIDGE_ADDIN
  190. help
  191. Support for Intel's EBSA285 companion chip.
  192. config ARCH_EBSA110
  193. bool "EBSA-110"
  194. select ISA
  195. select NO_IOPORT
  196. help
  197. This is an evaluation board for the StrongARM processor available
  198. from Digital. It has limited hardware on-board, including an
  199. Ethernet interface, two PCMCIA sockets, two serial ports and a
  200. parallel port.
  201. config ARCH_EP93XX
  202. bool "EP93xx-based"
  203. select ARM_AMBA
  204. select ARM_VIC
  205. select GENERIC_GPIO
  206. select HAVE_GPIO_LIB
  207. help
  208. This enables support for the Cirrus EP93xx series of CPUs.
  209. config ARCH_FOOTBRIDGE
  210. bool "FootBridge"
  211. select FOOTBRIDGE
  212. help
  213. Support for systems based on the DC21285 companion chip
  214. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  215. config ARCH_NETX
  216. bool "Hilscher NetX based"
  217. select ARM_VIC
  218. help
  219. This enables support for systems based on the Hilscher NetX Soc
  220. config ARCH_H720X
  221. bool "Hynix HMS720x-based"
  222. select ISA_DMA_API
  223. help
  224. This enables support for systems based on the Hynix HMS720x
  225. config ARCH_IMX
  226. bool "IMX"
  227. select GENERIC_GPIO
  228. select GENERIC_TIME
  229. select GENERIC_CLOCKEVENTS
  230. help
  231. Support for Motorola's i.MX family of processors (MX1, MXL).
  232. config ARCH_IOP13XX
  233. bool "IOP13xx-based"
  234. depends on MMU
  235. select PLAT_IOP
  236. select PCI
  237. select ARCH_SUPPORTS_MSI
  238. help
  239. Support for Intel's IOP13XX (XScale) family of processors.
  240. config ARCH_IOP32X
  241. bool "IOP32x-based"
  242. depends on MMU
  243. select PLAT_IOP
  244. select PCI
  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. help
  254. Support for Intel's IOP33X (XScale) family of processors.
  255. config ARCH_IXP23XX
  256. bool "IXP23XX-based"
  257. depends on MMU
  258. select PCI
  259. help
  260. Support for Intel's IXP23xx (XScale) family of processors.
  261. config ARCH_IXP2000
  262. bool "IXP2400/2800-based"
  263. depends on MMU
  264. select PCI
  265. help
  266. Support for Intel's IXP2400/2800 (XScale) family of processors.
  267. config ARCH_IXP4XX
  268. bool "IXP4xx-based"
  269. depends on MMU
  270. select GENERIC_GPIO
  271. select GENERIC_TIME
  272. select GENERIC_CLOCKEVENTS
  273. help
  274. Support for Intel's IXP4XX (XScale) family of processors.
  275. config ARCH_L7200
  276. bool "LinkUp-L7200"
  277. select FIQ
  278. help
  279. Say Y here if you intend to run this kernel on a LinkUp Systems
  280. L7200 Software Development Board which uses an ARM720T processor.
  281. Information on this board can be obtained at:
  282. <http://www.linkupsys.com/>
  283. If you have any questions or comments about the Linux kernel port
  284. to this board, send e-mail to <sjhill@cotw.com>.
  285. config ARCH_KS8695
  286. bool "Micrel/Kendin KS8695"
  287. select GENERIC_GPIO
  288. help
  289. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  290. System-on-Chip devices.
  291. config ARCH_NS9XXX
  292. bool "NetSilicon NS9xxx"
  293. select GENERIC_GPIO
  294. select GENERIC_TIME
  295. select GENERIC_CLOCKEVENTS
  296. help
  297. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  298. System.
  299. <http://www.digi.com/products/microprocessors/index.jsp>
  300. config ARCH_MXC
  301. bool "Freescale MXC/iMX-based"
  302. select ARCH_MTD_XIP
  303. help
  304. Support for Freescale MXC/iMX-based family of processors
  305. config ARCH_ORION5X
  306. bool "Marvell Orion"
  307. depends on MMU
  308. select PCI
  309. select GENERIC_GPIO
  310. select GENERIC_TIME
  311. select GENERIC_CLOCKEVENTS
  312. select PLAT_ORION
  313. help
  314. Support for the following Marvell Orion 5x series SoCs:
  315. Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)
  316. config ARCH_PNX4008
  317. bool "Philips Nexperia PNX4008 Mobile"
  318. help
  319. This enables support for Philips PNX4008 mobile platform.
  320. config ARCH_PXA
  321. bool "PXA2xx/PXA3xx-based"
  322. depends on MMU
  323. select ARCH_MTD_XIP
  324. select GENERIC_GPIO
  325. select HAVE_GPIO_LIB
  326. select GENERIC_TIME
  327. select GENERIC_CLOCKEVENTS
  328. select TICK_ONESHOT
  329. help
  330. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  331. config ARCH_RPC
  332. bool "RiscPC"
  333. select ARCH_ACORN
  334. select FIQ
  335. select TIMER_ACORN
  336. select ARCH_MAY_HAVE_PC_FDC
  337. select ISA_DMA_API
  338. select NO_IOPORT
  339. help
  340. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  341. CD-ROM interface, serial and parallel port, and the floppy drive.
  342. config ARCH_SA1100
  343. bool "SA1100-based"
  344. select ISA
  345. select ARCH_DISCONTIGMEM_ENABLE
  346. select ARCH_SPARSEMEM_ENABLE
  347. select ARCH_SELECT_MEMORY_MODEL
  348. select ARCH_MTD_XIP
  349. select GENERIC_GPIO
  350. select GENERIC_TIME
  351. select GENERIC_CLOCKEVENTS
  352. select TICK_ONESHOT
  353. select HAVE_GPIO_LIB
  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. help
  360. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  361. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  362. the Samsung SMDK2410 development board (and derivatives).
  363. config ARCH_SHARK
  364. bool "Shark"
  365. select ISA
  366. select ISA_DMA
  367. select PCI
  368. help
  369. Support for the StrongARM based Digital DNARD machine, also known
  370. as "Shark" (<http://www.shark-linux.de/shark.html>).
  371. config ARCH_LH7A40X
  372. bool "Sharp LH7A40X"
  373. help
  374. Say Y here for systems based on one of the Sharp LH7A40X
  375. System on a Chip processors. These CPUs include an ARM922T
  376. core with a wide array of integrated devices for
  377. hand-held and low-power applications.
  378. config ARCH_DAVINCI
  379. bool "TI DaVinci"
  380. select GENERIC_TIME
  381. select GENERIC_CLOCKEVENTS
  382. select GENERIC_GPIO
  383. help
  384. Support for TI's DaVinci platform.
  385. config ARCH_OMAP
  386. bool "TI OMAP"
  387. select GENERIC_GPIO
  388. select HAVE_GPIO_LIB
  389. select GENERIC_TIME
  390. select GENERIC_CLOCKEVENTS
  391. help
  392. Support for TI's OMAP platform (OMAP1 and OMAP2).
  393. config ARCH_MSM7X00A
  394. bool "Qualcomm MSM7X00A"
  395. select GENERIC_TIME
  396. select GENERIC_CLOCKEVENTS
  397. help
  398. Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
  399. apps processor of the MSM7X00A and depends on a shared memory
  400. interface to the ARM9 modem processor which runs the baseband stack
  401. and controls some vital subsystems (clock and power control, etc).
  402. <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
  403. endchoice
  404. source "arch/arm/mach-clps711x/Kconfig"
  405. source "arch/arm/mach-ep93xx/Kconfig"
  406. source "arch/arm/mach-footbridge/Kconfig"
  407. source "arch/arm/mach-integrator/Kconfig"
  408. source "arch/arm/mach-iop32x/Kconfig"
  409. source "arch/arm/mach-iop33x/Kconfig"
  410. source "arch/arm/mach-iop13xx/Kconfig"
  411. source "arch/arm/mach-ixp4xx/Kconfig"
  412. source "arch/arm/mach-ixp2000/Kconfig"
  413. source "arch/arm/mach-ixp23xx/Kconfig"
  414. source "arch/arm/mach-pxa/Kconfig"
  415. source "arch/arm/mach-sa1100/Kconfig"
  416. source "arch/arm/plat-omap/Kconfig"
  417. source "arch/arm/mach-omap1/Kconfig"
  418. source "arch/arm/mach-omap2/Kconfig"
  419. source "arch/arm/mach-orion5x/Kconfig"
  420. source "arch/arm/plat-s3c24xx/Kconfig"
  421. source "arch/arm/plat-s3c/Kconfig"
  422. if ARCH_S3C2410
  423. source "arch/arm/mach-s3c2400/Kconfig"
  424. source "arch/arm/mach-s3c2410/Kconfig"
  425. source "arch/arm/mach-s3c2412/Kconfig"
  426. source "arch/arm/mach-s3c2440/Kconfig"
  427. source "arch/arm/mach-s3c2442/Kconfig"
  428. source "arch/arm/mach-s3c2443/Kconfig"
  429. endif
  430. source "arch/arm/mach-lh7a40x/Kconfig"
  431. source "arch/arm/mach-imx/Kconfig"
  432. source "arch/arm/mach-h720x/Kconfig"
  433. source "arch/arm/mach-versatile/Kconfig"
  434. source "arch/arm/mach-aaec2000/Kconfig"
  435. source "arch/arm/mach-realview/Kconfig"
  436. source "arch/arm/mach-at91/Kconfig"
  437. source "arch/arm/plat-mxc/Kconfig"
  438. source "arch/arm/mach-netx/Kconfig"
  439. source "arch/arm/mach-ns9xxx/Kconfig"
  440. source "arch/arm/mach-davinci/Kconfig"
  441. source "arch/arm/mach-ks8695/Kconfig"
  442. source "arch/arm/mach-msm/Kconfig"
  443. # Definitions to make life easier
  444. config ARCH_ACORN
  445. bool
  446. config PLAT_IOP
  447. bool
  448. config PLAT_ORION
  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 || MACH_REALVIEW_PB11MP)
  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 || MACH_REALVIEW_PB11MP)
  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 ARCH_SPARSEMEM_ENABLE
  621. bool
  622. config ARCH_SELECT_MEMORY_MODEL
  623. bool
  624. config NODES_SHIFT
  625. int
  626. default "4" if ARCH_LH7A40X
  627. default "2"
  628. depends on NEED_MULTIPLE_NODES
  629. source "mm/Kconfig"
  630. config LEDS
  631. bool "Timer and CPU usage LEDs"
  632. depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
  633. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  634. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  635. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  636. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  637. ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
  638. ARCH_KS8695 || MACH_RD88F5182
  639. help
  640. If you say Y here, the LEDs on your machine will be used
  641. to provide useful information about your current system status.
  642. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  643. be able to select which LEDs are active using the options below. If
  644. you are compiling a kernel for the EBSA-110 or the LART however, the
  645. red LED will simply flash regularly to indicate that the system is
  646. still functional. It is safe to say Y here if you have a CATS
  647. system, but the driver will do nothing.
  648. config LEDS_TIMER
  649. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  650. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  651. || MACH_OMAP_PERSEUS2
  652. depends on LEDS
  653. depends on !GENERIC_CLOCKEVENTS
  654. default y if ARCH_EBSA110
  655. help
  656. If you say Y here, one of the system LEDs (the green one on the
  657. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  658. will flash regularly to indicate that the system is still
  659. operational. This is mainly useful to kernel hackers who are
  660. debugging unstable kernels.
  661. The LART uses the same LED for both Timer LED and CPU usage LED
  662. functions. You may choose to use both, but the Timer LED function
  663. will overrule the CPU usage LED.
  664. config LEDS_CPU
  665. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  666. !ARCH_OMAP) \
  667. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  668. || MACH_OMAP_PERSEUS2
  669. depends on LEDS
  670. help
  671. If you say Y here, the red LED will be used to give a good real
  672. time indication of CPU usage, by lighting whenever the idle task
  673. is not currently executing.
  674. The LART uses the same LED for both Timer LED and CPU usage LED
  675. functions. You may choose to use both, but the Timer LED function
  676. will overrule the CPU usage LED.
  677. config ALIGNMENT_TRAP
  678. bool
  679. depends on CPU_CP15_MMU
  680. default y if !ARCH_EBSA110
  681. help
  682. ARM processors cannot fetch/store information which is not
  683. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  684. address divisible by 4. On 32-bit ARM processors, these non-aligned
  685. fetch/store instructions will be emulated in software if you say
  686. here, which has a severe performance impact. This is necessary for
  687. correct operation of some network protocols. With an IP-only
  688. configuration it is safe to say N, otherwise say Y.
  689. endmenu
  690. menu "Boot options"
  691. # Compressed boot loader in ROM. Yes, we really want to ask about
  692. # TEXT and BSS so we preserve their values in the config files.
  693. config ZBOOT_ROM_TEXT
  694. hex "Compressed ROM boot loader base address"
  695. default "0"
  696. help
  697. The physical address at which the ROM-able zImage is to be
  698. placed in the target. Platforms which normally make use of
  699. ROM-able zImage formats normally set this to a suitable
  700. value in their defconfig file.
  701. If ZBOOT_ROM is not enabled, this has no effect.
  702. config ZBOOT_ROM_BSS
  703. hex "Compressed ROM boot loader BSS address"
  704. default "0"
  705. help
  706. The base address of an area of read/write memory in the target
  707. for the ROM-able zImage which must be available while the
  708. decompressor is running. It must be large enough to hold the
  709. entire decompressed kernel plus an additional 128 KiB.
  710. Platforms which normally make use of ROM-able zImage formats
  711. normally set this to a suitable value in their defconfig file.
  712. If ZBOOT_ROM is not enabled, this has no effect.
  713. config ZBOOT_ROM
  714. bool "Compressed boot loader in ROM/flash"
  715. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  716. help
  717. Say Y here if you intend to execute your compressed kernel image
  718. (zImage) directly from ROM or flash. If unsure, say N.
  719. config CMDLINE
  720. string "Default kernel command string"
  721. default ""
  722. help
  723. On some architectures (EBSA110 and CATS), there is currently no way
  724. for the boot loader to pass arguments to the kernel. For these
  725. architectures, you should supply some command-line options at build
  726. time by entering them here. As a minimum, you should specify the
  727. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  728. config XIP_KERNEL
  729. bool "Kernel Execute-In-Place from ROM"
  730. depends on !ZBOOT_ROM
  731. help
  732. Execute-In-Place allows the kernel to run from non-volatile storage
  733. directly addressable by the CPU, such as NOR flash. This saves RAM
  734. space since the text section of the kernel is not loaded from flash
  735. to RAM. Read-write sections, such as the data section and stack,
  736. are still copied to RAM. The XIP kernel is not compressed since
  737. it has to run directly from flash, so it will take more space to
  738. store it. The flash address used to link the kernel object files,
  739. and for storing it, is configuration dependent. Therefore, if you
  740. say Y here, you must know the proper physical address where to
  741. store the kernel image depending on your own flash memory usage.
  742. Also note that the make target becomes "make xipImage" rather than
  743. "make zImage" or "make Image". The final kernel binary to put in
  744. ROM memory will be arch/arm/boot/xipImage.
  745. If unsure, say N.
  746. config XIP_PHYS_ADDR
  747. hex "XIP Kernel Physical Location"
  748. depends on XIP_KERNEL
  749. default "0x00080000"
  750. help
  751. This is the physical address in your flash memory the kernel will
  752. be linked for and stored to. This address is dependent on your
  753. own flash usage.
  754. config KEXEC
  755. bool "Kexec system call (EXPERIMENTAL)"
  756. depends on EXPERIMENTAL
  757. help
  758. kexec is a system call that implements the ability to shutdown your
  759. current kernel, and to start another kernel. It is like a reboot
  760. but it is independent of the system firmware. And like a reboot
  761. you can start any kernel with it, not just Linux.
  762. It is an ongoing process to be certain the hardware in a machine
  763. is properly shutdown, so do not be surprised if this code does not
  764. initially work for you. It may help to enable device hotplugging
  765. support.
  766. config ATAGS_PROC
  767. bool "Export atags in procfs"
  768. depends on KEXEC
  769. default y
  770. help
  771. Should the atags used to boot the kernel be exported in an "atags"
  772. file in procfs. Useful with kexec.
  773. endmenu
  774. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
  775. menu "CPU Frequency scaling"
  776. source "drivers/cpufreq/Kconfig"
  777. config CPU_FREQ_SA1100
  778. bool
  779. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  780. default y
  781. config CPU_FREQ_SA1110
  782. bool
  783. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  784. default y
  785. config CPU_FREQ_INTEGRATOR
  786. tristate "CPUfreq driver for ARM Integrator CPUs"
  787. depends on ARCH_INTEGRATOR && CPU_FREQ
  788. default y
  789. help
  790. This enables the CPUfreq driver for ARM Integrator CPUs.
  791. For details, take a look at <file:Documentation/cpu-freq>.
  792. If in doubt, say Y.
  793. config CPU_FREQ_IMX
  794. tristate "CPUfreq driver for i.MX CPUs"
  795. depends on ARCH_IMX && CPU_FREQ
  796. default n
  797. help
  798. This enables the CPUfreq driver for i.MX CPUs.
  799. If in doubt, say N.
  800. config CPU_FREQ_PXA
  801. bool
  802. depends on CPU_FREQ && ARCH_PXA && PXA25x
  803. default y
  804. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  805. endmenu
  806. endif
  807. menu "Floating point emulation"
  808. comment "At least one emulation must be selected"
  809. config FPE_NWFPE
  810. bool "NWFPE math emulation"
  811. depends on !AEABI || OABI_COMPAT
  812. ---help---
  813. Say Y to include the NWFPE floating point emulator in the kernel.
  814. This is necessary to run most binaries. Linux does not currently
  815. support floating point hardware so you need to say Y here even if
  816. your machine has an FPA or floating point co-processor podule.
  817. You may say N here if you are going to load the Acorn FPEmulator
  818. early in the bootup.
  819. config FPE_NWFPE_XP
  820. bool "Support extended precision"
  821. depends on FPE_NWFPE
  822. help
  823. Say Y to include 80-bit support in the kernel floating-point
  824. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  825. Note that gcc does not generate 80-bit operations by default,
  826. so in most cases this option only enlarges the size of the
  827. floating point emulator without any good reason.
  828. You almost surely want to say N here.
  829. config FPE_FASTFPE
  830. bool "FastFPE math emulation (EXPERIMENTAL)"
  831. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  832. ---help---
  833. Say Y here to include the FAST floating point emulator in the kernel.
  834. This is an experimental much faster emulator which now also has full
  835. precision for the mantissa. It does not support any exceptions.
  836. It is very simple, and approximately 3-6 times faster than NWFPE.
  837. It should be sufficient for most programs. It may be not suitable
  838. for scientific calculations, but you have to check this for yourself.
  839. If you do not feel you need a faster FP emulation you should better
  840. choose NWFPE.
  841. config VFP
  842. bool "VFP-format floating point maths"
  843. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  844. help
  845. Say Y to include VFP support code in the kernel. This is needed
  846. if your hardware includes a VFP unit.
  847. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  848. release notes and additional status information.
  849. Say N if your target does not have VFP hardware.
  850. config VFPv3
  851. bool
  852. depends on VFP
  853. default y if CPU_V7
  854. config NEON
  855. bool "Advanced SIMD (NEON) Extension support"
  856. depends on VFPv3 && CPU_V7
  857. help
  858. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  859. Extension.
  860. endmenu
  861. menu "Userspace binary formats"
  862. source "fs/Kconfig.binfmt"
  863. config ARTHUR
  864. tristate "RISC OS personality"
  865. depends on !AEABI
  866. help
  867. Say Y here to include the kernel code necessary if you want to run
  868. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  869. experimental; if this sounds frightening, say N and sleep in peace.
  870. You can also say M here to compile this support as a module (which
  871. will be called arthur).
  872. endmenu
  873. menu "Power management options"
  874. source "kernel/power/Kconfig"
  875. config ARCH_SUSPEND_POSSIBLE
  876. def_bool y
  877. endmenu
  878. source "net/Kconfig"
  879. menu "Device Drivers"
  880. source "drivers/base/Kconfig"
  881. source "drivers/connector/Kconfig"
  882. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  883. source "drivers/mtd/Kconfig"
  884. endif
  885. source "drivers/parport/Kconfig"
  886. source "drivers/pnp/Kconfig"
  887. source "drivers/block/Kconfig"
  888. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  889. source "drivers/misc/Kconfig"
  890. source "drivers/ide/Kconfig"
  891. source "drivers/scsi/Kconfig"
  892. source "drivers/ata/Kconfig"
  893. source "drivers/md/Kconfig"
  894. source "drivers/message/fusion/Kconfig"
  895. source "drivers/ieee1394/Kconfig"
  896. source "drivers/message/i2o/Kconfig"
  897. source "drivers/net/Kconfig"
  898. source "drivers/isdn/Kconfig"
  899. # input before char - char/joystick depends on it. As does USB.
  900. source "drivers/input/Kconfig"
  901. source "drivers/char/Kconfig"
  902. source "drivers/i2c/Kconfig"
  903. source "drivers/spi/Kconfig"
  904. source "drivers/gpio/Kconfig"
  905. source "drivers/w1/Kconfig"
  906. source "drivers/power/Kconfig"
  907. source "drivers/hwmon/Kconfig"
  908. source "drivers/watchdog/Kconfig"
  909. source "drivers/ssb/Kconfig"
  910. #source "drivers/l3/Kconfig"
  911. source "drivers/mfd/Kconfig"
  912. source "drivers/media/Kconfig"
  913. source "drivers/video/Kconfig"
  914. source "sound/Kconfig"
  915. source "drivers/hid/Kconfig"
  916. source "drivers/usb/Kconfig"
  917. source "drivers/mmc/Kconfig"
  918. source "drivers/leds/Kconfig"
  919. source "drivers/rtc/Kconfig"
  920. source "drivers/dma/Kconfig"
  921. source "drivers/dca/Kconfig"
  922. source "drivers/uio/Kconfig"
  923. endmenu
  924. source "fs/Kconfig"
  925. source "arch/arm/Kconfig.debug"
  926. source "security/Kconfig"
  927. source "crypto/Kconfig"
  928. source "lib/Kconfig"