Kconfig 25 KB

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  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see Documentation/kbuild/kconfig-language.txt.
  4. #
  5. mainmenu "Linux Kernel Configuration"
  6. config ARM
  7. bool
  8. default y
  9. select RTC_LIB
  10. help
  11. The ARM series is a line of low-power-consumption RISC chip designs
  12. licensed by ARM Ltd and targeted at embedded applications and
  13. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  14. manufactured, but legacy ARM-based PC hardware remains popular in
  15. Europe. There is an ARM Linux project with a web page at
  16. <http://www.arm.linux.org.uk/>.
  17. config MMU
  18. bool
  19. default y
  20. config EISA
  21. bool
  22. ---help---
  23. The Extended Industry Standard Architecture (EISA) bus was
  24. developed as an open alternative to the IBM MicroChannel bus.
  25. The EISA bus provided some of the features of the IBM MicroChannel
  26. bus while maintaining backward compatibility with cards made for
  27. the older ISA bus. The EISA bus saw limited use between 1988 and
  28. 1995 when it was made obsolete by the PCI bus.
  29. Say Y here if you are building a kernel for an EISA-based machine.
  30. Otherwise, say N.
  31. config SBUS
  32. bool
  33. config MCA
  34. bool
  35. help
  36. MicroChannel Architecture is found in some IBM PS/2 machines and
  37. laptops. It is a bus system similar to PCI or ISA. See
  38. <file:Documentation/mca.txt> (and especially the web page given
  39. there) before attempting to build an MCA bus kernel.
  40. config RWSEM_GENERIC_SPINLOCK
  41. bool
  42. default y
  43. config RWSEM_XCHGADD_ALGORITHM
  44. bool
  45. config GENERIC_HWEIGHT
  46. bool
  47. default y
  48. config GENERIC_CALIBRATE_DELAY
  49. bool
  50. default y
  51. config GENERIC_BUST_SPINLOCK
  52. bool
  53. config ARCH_MAY_HAVE_PC_FDC
  54. bool
  55. config GENERIC_ISA_DMA
  56. bool
  57. config FIQ
  58. bool
  59. config ARCH_MTD_XIP
  60. bool
  61. config VECTORS_BASE
  62. hex
  63. default 0xffff0000 if MMU
  64. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  65. default 0x00000000
  66. help
  67. The base address of exception vectors.
  68. source "init/Kconfig"
  69. menu "System Type"
  70. choice
  71. prompt "ARM system type"
  72. default ARCH_VERSATILE
  73. config ARCH_AAEC2000
  74. bool "Agilent AAEC-2000 based"
  75. select ARM_AMBA
  76. help
  77. This enables support for systems based on the Agilent AAEC-2000
  78. config ARCH_INTEGRATOR
  79. bool "ARM Ltd. Integrator family"
  80. select ARM_AMBA
  81. select ICST525
  82. help
  83. Support for ARM's Integrator platform.
  84. config ARCH_REALVIEW
  85. bool "ARM Ltd. RealView family"
  86. select ARM_AMBA
  87. select ICST307
  88. help
  89. This enables support for ARM Ltd RealView boards.
  90. config ARCH_VERSATILE
  91. bool "ARM Ltd. Versatile family"
  92. select ARM_AMBA
  93. select ARM_VIC
  94. select ICST307
  95. help
  96. This enables support for ARM Ltd Versatile board.
  97. config ARCH_AT91RM9200
  98. bool "Atmel AT91RM9200"
  99. help
  100. Say Y here if you intend to run this kernel on an Atmel
  101. AT91RM9200-based board.
  102. config ARCH_CLPS7500
  103. bool "Cirrus CL-PS7500FE"
  104. select TIMER_ACORN
  105. select ISA
  106. help
  107. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  108. config ARCH_CLPS711X
  109. bool "Cirrus Logic CLPS711x/EP721x-based"
  110. help
  111. Support for Cirrus Logic 711x/721x based boards.
  112. config ARCH_CO285
  113. bool "Co-EBSA285"
  114. select FOOTBRIDGE
  115. select FOOTBRIDGE_ADDIN
  116. help
  117. Support for Intel's EBSA285 companion chip.
  118. config ARCH_EBSA110
  119. bool "EBSA-110"
  120. select ISA
  121. help
  122. This is an evaluation board for the StrongARM processor available
  123. from Digital. It has limited hardware on-board, including an
  124. Ethernet interface, two PCMCIA sockets, two serial ports and a
  125. parallel port.
  126. config ARCH_EP93XX
  127. bool "EP93xx-based"
  128. select ARM_AMBA
  129. select ARM_VIC
  130. help
  131. This enables support for the Cirrus EP93xx series of CPUs.
  132. config ARCH_FOOTBRIDGE
  133. bool "FootBridge"
  134. select FOOTBRIDGE
  135. help
  136. Support for systems based on the DC21285 companion chip
  137. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  138. config ARCH_NETX
  139. bool "Hilscher NetX based"
  140. select ARM_VIC
  141. help
  142. This enables support for systems based on the Hilscher NetX Soc
  143. config ARCH_H720X
  144. bool "Hynix HMS720x-based"
  145. select ISA_DMA_API
  146. help
  147. This enables support for systems based on the Hynix HMS720x
  148. config ARCH_IMX
  149. bool "IMX"
  150. help
  151. Support for Motorola's i.MX family of processors (MX1, MXL).
  152. config ARCH_IOP3XX
  153. bool "IOP3xx-based"
  154. depends on MMU
  155. select PCI
  156. help
  157. Support for Intel's IOP3XX (XScale) family of processors.
  158. config ARCH_IXP4XX
  159. bool "IXP4xx-based"
  160. depends on MMU
  161. help
  162. Support for Intel's IXP4XX (XScale) family of processors.
  163. config ARCH_IXP2000
  164. bool "IXP2400/2800-based"
  165. depends on MMU
  166. select PCI
  167. help
  168. Support for Intel's IXP2400/2800 (XScale) family of processors.
  169. config ARCH_IXP23XX
  170. bool "IXP23XX-based"
  171. depends on MMU
  172. select PCI
  173. help
  174. Support for Intel's IXP23xx (XScale) family of processors.
  175. config ARCH_L7200
  176. bool "LinkUp-L7200"
  177. select FIQ
  178. help
  179. Say Y here if you intend to run this kernel on a LinkUp Systems
  180. L7200 Software Development Board which uses an ARM720T processor.
  181. Information on this board can be obtained at:
  182. <http://www.linkupsys.com/>
  183. If you have any questions or comments about the Linux kernel port
  184. to this board, send e-mail to <sjhill@cotw.com>.
  185. config ARCH_PNX4008
  186. bool "Philips Nexperia PNX4008 Mobile"
  187. help
  188. This enables support for Philips PNX4008 mobile platform.
  189. config ARCH_PXA
  190. bool "PXA2xx-based"
  191. depends on MMU
  192. select ARCH_MTD_XIP
  193. help
  194. Support for Intel's PXA2XX processor line.
  195. config ARCH_RPC
  196. bool "RiscPC"
  197. select ARCH_ACORN
  198. select FIQ
  199. select TIMER_ACORN
  200. select ARCH_MAY_HAVE_PC_FDC
  201. select ISA_DMA_API
  202. help
  203. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  204. CD-ROM interface, serial and parallel port, and the floppy drive.
  205. config ARCH_SA1100
  206. bool "SA1100-based"
  207. select ISA
  208. select ARCH_DISCONTIGMEM_ENABLE
  209. select ARCH_MTD_XIP
  210. help
  211. Support for StrongARM 11x0 based boards.
  212. config ARCH_S3C2410
  213. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
  214. help
  215. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  216. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  217. the Samsung SMDK2410 development board (and derivatives).
  218. config ARCH_SHARK
  219. bool "Shark"
  220. select ISA
  221. select ISA_DMA
  222. select PCI
  223. help
  224. Support for the StrongARM based Digital DNARD machine, also known
  225. as "Shark" (<http://www.shark-linux.de/shark.html>).
  226. config ARCH_LH7A40X
  227. bool "Sharp LH7A40X"
  228. help
  229. Say Y here for systems based on one of the Sharp LH7A40X
  230. System on a Chip processors. These CPUs include an ARM922T
  231. core with a wide array of integrated devices for
  232. hand-held and low-power applications.
  233. config ARCH_OMAP
  234. bool "TI OMAP"
  235. help
  236. Support for TI's OMAP platform (OMAP1 and OMAP2).
  237. endchoice
  238. source "arch/arm/mach-clps711x/Kconfig"
  239. source "arch/arm/mach-ep93xx/Kconfig"
  240. source "arch/arm/mach-footbridge/Kconfig"
  241. source "arch/arm/mach-integrator/Kconfig"
  242. source "arch/arm/mach-iop3xx/Kconfig"
  243. source "arch/arm/mach-ixp4xx/Kconfig"
  244. source "arch/arm/mach-ixp2000/Kconfig"
  245. source "arch/arm/mach-ixp23xx/Kconfig"
  246. source "arch/arm/mach-pxa/Kconfig"
  247. source "arch/arm/mach-sa1100/Kconfig"
  248. source "arch/arm/plat-omap/Kconfig"
  249. source "arch/arm/mach-omap1/Kconfig"
  250. source "arch/arm/mach-omap2/Kconfig"
  251. source "arch/arm/mach-s3c2410/Kconfig"
  252. source "arch/arm/mach-lh7a40x/Kconfig"
  253. source "arch/arm/mach-imx/Kconfig"
  254. source "arch/arm/mach-h720x/Kconfig"
  255. source "arch/arm/mach-versatile/Kconfig"
  256. source "arch/arm/mach-aaec2000/Kconfig"
  257. source "arch/arm/mach-realview/Kconfig"
  258. source "arch/arm/mach-at91rm9200/Kconfig"
  259. source "arch/arm/mach-netx/Kconfig"
  260. # Definitions to make life easier
  261. config ARCH_ACORN
  262. bool
  263. source arch/arm/mm/Kconfig
  264. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  265. config XSCALE_PMU
  266. bool
  267. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  268. default y
  269. if !MMU
  270. source "arch/arm/Kconfig-nommu"
  271. endif
  272. endmenu
  273. source "arch/arm/common/Kconfig"
  274. config FORCE_MAX_ZONEORDER
  275. int
  276. depends on SA1111
  277. default "9"
  278. menu "Bus support"
  279. config ARM_AMBA
  280. bool
  281. config ISA
  282. bool
  283. help
  284. Find out whether you have ISA slots on your motherboard. ISA is the
  285. name of a bus system, i.e. the way the CPU talks to the other stuff
  286. inside your box. Other bus systems are PCI, EISA, MicroChannel
  287. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  288. newer boards don't support it. If you have ISA, say Y, otherwise N.
  289. # Select ISA DMA controller support
  290. config ISA_DMA
  291. bool
  292. select ISA_DMA_API
  293. # Select ISA DMA interface
  294. config ISA_DMA_API
  295. bool
  296. config PCI
  297. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
  298. help
  299. Find out whether you have a PCI motherboard. PCI is the name of a
  300. bus system, i.e. the way the CPU talks to the other stuff inside
  301. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  302. VESA. If you have PCI, say Y, otherwise N.
  303. The PCI-HOWTO, available from
  304. <http://www.tldp.org/docs.html#howto>, contains valuable
  305. information about which PCI hardware does work under Linux and which
  306. doesn't.
  307. # Select the host bridge type
  308. config PCI_HOST_VIA82C505
  309. bool
  310. depends on PCI && ARCH_SHARK
  311. default y
  312. source "drivers/pci/Kconfig"
  313. source "drivers/pcmcia/Kconfig"
  314. endmenu
  315. menu "Kernel Features"
  316. config SMP
  317. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  318. depends on EXPERIMENTAL && REALVIEW_MPCORE
  319. help
  320. This enables support for systems with more than one CPU. If you have
  321. a system with only one CPU, like most personal computers, say N. If
  322. you have a system with more than one CPU, say Y.
  323. If you say N here, the kernel will run on single and multiprocessor
  324. machines, but will use only one CPU of a multiprocessor machine. If
  325. you say Y here, the kernel will run on many, but not all, single
  326. processor machines. On a single processor machine, the kernel will
  327. run faster if you say N here.
  328. See also the <file:Documentation/smp.txt>,
  329. <file:Documentation/i386/IO-APIC.txt>,
  330. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  331. <http://www.linuxdoc.org/docs.html#howto>.
  332. If you don't know what to do here, say N.
  333. config NR_CPUS
  334. int "Maximum number of CPUs (2-32)"
  335. range 2 32
  336. depends on SMP
  337. default "4"
  338. config HOTPLUG_CPU
  339. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  340. depends on SMP && HOTPLUG && EXPERIMENTAL
  341. help
  342. Say Y here to experiment with turning CPUs off and on. CPUs
  343. can be controlled through /sys/devices/system/cpu.
  344. config LOCAL_TIMERS
  345. bool "Use local timer interrupts"
  346. depends on SMP && REALVIEW_MPCORE
  347. default y
  348. help
  349. Enable support for local timers on SMP platforms, rather then the
  350. legacy IPI broadcast method. Local timers allows the system
  351. accounting to be spread across the timer interval, preventing a
  352. "thundering herd" at every timer tick.
  353. config PREEMPT
  354. bool "Preemptible Kernel (EXPERIMENTAL)"
  355. depends on EXPERIMENTAL
  356. help
  357. This option reduces the latency of the kernel when reacting to
  358. real-time or interactive events by allowing a low priority process to
  359. be preempted even if it is in kernel mode executing a system call.
  360. This allows applications to run more reliably even when the system is
  361. under load.
  362. Say Y here if you are building a kernel for a desktop, embedded
  363. or real-time system. Say N if you are unsure.
  364. config NO_IDLE_HZ
  365. bool "Dynamic tick timer"
  366. help
  367. Select this option if you want to disable continuous timer ticks
  368. and have them programmed to occur as required. This option saves
  369. power as the system can remain in idle state for longer.
  370. By default dynamic tick is disabled during the boot, and can be
  371. manually enabled with:
  372. echo 1 > /sys/devices/system/timer/timer0/dyn_tick
  373. Alternatively, if you want dynamic tick automatically enabled
  374. during boot, pass "dyntick=enable" via the kernel command string.
  375. Please note that dynamic tick may affect the accuracy of
  376. timekeeping on some platforms depending on the implementation.
  377. Currently at least OMAP, PXA2xx and SA11x0 platforms are known
  378. to have accurate timekeeping with dynamic tick.
  379. config HZ
  380. int
  381. default 128 if ARCH_L7200
  382. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  383. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  384. default 100
  385. config AEABI
  386. bool "Use the ARM EABI to compile the kernel"
  387. help
  388. This option allows for the kernel to be compiled using the latest
  389. ARM ABI (aka EABI). This is only useful if you are using a user
  390. space environment that is also compiled with EABI.
  391. Since there are major incompatibilities between the legacy ABI and
  392. EABI, especially with regard to structure member alignment, this
  393. option also changes the kernel syscall calling convention to
  394. disambiguate both ABIs and allow for backward compatibility support
  395. (selected with CONFIG_OABI_COMPAT).
  396. To use this you need GCC version 4.0.0 or later.
  397. config OABI_COMPAT
  398. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  399. depends on AEABI && EXPERIMENTAL
  400. default y
  401. help
  402. This option preserves the old syscall interface along with the
  403. new (ARM EABI) one. It also provides a compatibility layer to
  404. intercept syscalls that have structure arguments which layout
  405. in memory differs between the legacy ABI and the new ARM EABI
  406. (only for non "thumb" binaries). This option adds a tiny
  407. overhead to all syscalls and produces a slightly larger kernel.
  408. If you know you'll be using only pure EABI user space then you
  409. can say N here. If this option is not selected and you attempt
  410. to execute a legacy ABI binary then the result will be
  411. UNPREDICTABLE (in fact it can be predicted that it won't work
  412. at all). If in doubt say Y.
  413. config ARCH_DISCONTIGMEM_ENABLE
  414. bool
  415. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  416. help
  417. Say Y to support efficient handling of discontiguous physical memory,
  418. for architectures which are either NUMA (Non-Uniform Memory Access)
  419. or have huge holes in the physical address space for other reasons.
  420. See <file:Documentation/vm/numa> for more.
  421. config NODES_SHIFT
  422. int
  423. default "4" if ARCH_LH7A40X
  424. default "2"
  425. depends on NEED_MULTIPLE_NODES
  426. source "mm/Kconfig"
  427. config LEDS
  428. bool "Timer and CPU usage LEDs"
  429. depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
  430. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  431. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  432. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  433. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  434. ARCH_AT91RM9200
  435. help
  436. If you say Y here, the LEDs on your machine will be used
  437. to provide useful information about your current system status.
  438. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  439. be able to select which LEDs are active using the options below. If
  440. you are compiling a kernel for the EBSA-110 or the LART however, the
  441. red LED will simply flash regularly to indicate that the system is
  442. still functional. It is safe to say Y here if you have a CATS
  443. system, but the driver will do nothing.
  444. config LEDS_TIMER
  445. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  446. MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  447. depends on LEDS
  448. default y if ARCH_EBSA110
  449. help
  450. If you say Y here, one of the system LEDs (the green one on the
  451. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  452. will flash regularly to indicate that the system is still
  453. operational. This is mainly useful to kernel hackers who are
  454. debugging unstable kernels.
  455. The LART uses the same LED for both Timer LED and CPU usage LED
  456. functions. You may choose to use both, but the Timer LED function
  457. will overrule the CPU usage LED.
  458. config LEDS_CPU
  459. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  460. !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  461. depends on LEDS
  462. help
  463. If you say Y here, the red LED will be used to give a good real
  464. time indication of CPU usage, by lighting whenever the idle task
  465. is not currently executing.
  466. The LART uses the same LED for both Timer LED and CPU usage LED
  467. functions. You may choose to use both, but the Timer LED function
  468. will overrule the CPU usage LED.
  469. config ALIGNMENT_TRAP
  470. bool
  471. default y if !ARCH_EBSA110
  472. help
  473. ARM processors can not fetch/store information which is not
  474. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  475. address divisible by 4. On 32-bit ARM processors, these non-aligned
  476. fetch/store instructions will be emulated in software if you say
  477. here, which has a severe performance impact. This is necessary for
  478. correct operation of some network protocols. With an IP-only
  479. configuration it is safe to say N, otherwise say Y.
  480. endmenu
  481. menu "Boot options"
  482. # Compressed boot loader in ROM. Yes, we really want to ask about
  483. # TEXT and BSS so we preserve their values in the config files.
  484. config ZBOOT_ROM_TEXT
  485. hex "Compressed ROM boot loader base address"
  486. default "0"
  487. help
  488. The physical address at which the ROM-able zImage is to be
  489. placed in the target. Platforms which normally make use of
  490. ROM-able zImage formats normally set this to a suitable
  491. value in their defconfig file.
  492. If ZBOOT_ROM is not enabled, this has no effect.
  493. config ZBOOT_ROM_BSS
  494. hex "Compressed ROM boot loader BSS address"
  495. default "0"
  496. help
  497. The base address of 64KiB of read/write memory in the target
  498. for the ROM-able zImage, which must be available while the
  499. decompressor is running. Platforms which normally make use of
  500. ROM-able zImage formats normally set this to a suitable
  501. value in their defconfig file.
  502. If ZBOOT_ROM is not enabled, this has no effect.
  503. config ZBOOT_ROM
  504. bool "Compressed boot loader in ROM/flash"
  505. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  506. help
  507. Say Y here if you intend to execute your compressed kernel image
  508. (zImage) directly from ROM or flash. If unsure, say N.
  509. config CMDLINE
  510. string "Default kernel command string"
  511. default ""
  512. help
  513. On some architectures (EBSA110 and CATS), there is currently no way
  514. for the boot loader to pass arguments to the kernel. For these
  515. architectures, you should supply some command-line options at build
  516. time by entering them here. As a minimum, you should specify the
  517. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  518. config XIP_KERNEL
  519. bool "Kernel Execute-In-Place from ROM"
  520. depends on !ZBOOT_ROM
  521. help
  522. Execute-In-Place allows the kernel to run from non-volatile storage
  523. directly addressable by the CPU, such as NOR flash. This saves RAM
  524. space since the text section of the kernel is not loaded from flash
  525. to RAM. Read-write sections, such as the data section and stack,
  526. are still copied to RAM. The XIP kernel is not compressed since
  527. it has to run directly from flash, so it will take more space to
  528. store it. The flash address used to link the kernel object files,
  529. and for storing it, is configuration dependent. Therefore, if you
  530. say Y here, you must know the proper physical address where to
  531. store the kernel image depending on your own flash memory usage.
  532. Also note that the make target becomes "make xipImage" rather than
  533. "make zImage" or "make Image". The final kernel binary to put in
  534. ROM memory will be arch/arm/boot/xipImage.
  535. If unsure, say N.
  536. config XIP_PHYS_ADDR
  537. hex "XIP Kernel Physical Location"
  538. depends on XIP_KERNEL
  539. default "0x00080000"
  540. help
  541. This is the physical address in your flash memory the kernel will
  542. be linked for and stored to. This address is dependent on your
  543. own flash usage.
  544. endmenu
  545. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1)
  546. menu "CPU Frequency scaling"
  547. source "drivers/cpufreq/Kconfig"
  548. config CPU_FREQ_SA1100
  549. bool
  550. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  551. default y
  552. config CPU_FREQ_SA1110
  553. bool
  554. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  555. default y
  556. config CPU_FREQ_INTEGRATOR
  557. tristate "CPUfreq driver for ARM Integrator CPUs"
  558. depends on ARCH_INTEGRATOR && CPU_FREQ
  559. default y
  560. help
  561. This enables the CPUfreq driver for ARM Integrator CPUs.
  562. For details, take a look at <file:Documentation/cpu-freq>.
  563. If in doubt, say Y.
  564. endmenu
  565. endif
  566. menu "Floating point emulation"
  567. comment "At least one emulation must be selected"
  568. config FPE_NWFPE
  569. bool "NWFPE math emulation"
  570. depends on !AEABI || OABI_COMPAT
  571. ---help---
  572. Say Y to include the NWFPE floating point emulator in the kernel.
  573. This is necessary to run most binaries. Linux does not currently
  574. support floating point hardware so you need to say Y here even if
  575. your machine has an FPA or floating point co-processor podule.
  576. You may say N here if you are going to load the Acorn FPEmulator
  577. early in the bootup.
  578. config FPE_NWFPE_XP
  579. bool "Support extended precision"
  580. depends on FPE_NWFPE
  581. help
  582. Say Y to include 80-bit support in the kernel floating-point
  583. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  584. Note that gcc does not generate 80-bit operations by default,
  585. so in most cases this option only enlarges the size of the
  586. floating point emulator without any good reason.
  587. You almost surely want to say N here.
  588. config FPE_FASTFPE
  589. bool "FastFPE math emulation (EXPERIMENTAL)"
  590. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  591. ---help---
  592. Say Y here to include the FAST floating point emulator in the kernel.
  593. This is an experimental much faster emulator which now also has full
  594. precision for the mantissa. It does not support any exceptions.
  595. It is very simple, and approximately 3-6 times faster than NWFPE.
  596. It should be sufficient for most programs. It may be not suitable
  597. for scientific calculations, but you have to check this for yourself.
  598. If you do not feel you need a faster FP emulation you should better
  599. choose NWFPE.
  600. config VFP
  601. bool "VFP-format floating point maths"
  602. depends on CPU_V6 || CPU_ARM926T
  603. help
  604. Say Y to include VFP support code in the kernel. This is needed
  605. if your hardware includes a VFP unit.
  606. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  607. release notes and additional status information.
  608. Say N if your target does not have VFP hardware.
  609. endmenu
  610. menu "Userspace binary formats"
  611. source "fs/Kconfig.binfmt"
  612. config ARTHUR
  613. tristate "RISC OS personality"
  614. depends on !AEABI
  615. help
  616. Say Y here to include the kernel code necessary if you want to run
  617. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  618. experimental; if this sounds frightening, say N and sleep in peace.
  619. You can also say M here to compile this support as a module (which
  620. will be called arthur).
  621. endmenu
  622. menu "Power management options"
  623. source "kernel/power/Kconfig"
  624. config APM
  625. tristate "Advanced Power Management Emulation"
  626. ---help---
  627. APM is a BIOS specification for saving power using several different
  628. techniques. This is mostly useful for battery powered laptops with
  629. APM compliant BIOSes. If you say Y here, the system time will be
  630. reset after a RESUME operation, the /proc/apm device will provide
  631. battery status information, and user-space programs will receive
  632. notification of APM "events" (e.g. battery status change).
  633. In order to use APM, you will need supporting software. For location
  634. and more information, read <file:Documentation/pm.txt> and the
  635. Battery Powered Linux mini-HOWTO, available from
  636. <http://www.tldp.org/docs.html#howto>.
  637. This driver does not spin down disk drives (see the hdparm(8)
  638. manpage ("man 8 hdparm") for that), and it doesn't turn off
  639. VESA-compliant "green" monitors.
  640. Generally, if you don't have a battery in your machine, there isn't
  641. much point in using this driver and you should say N. If you get
  642. random kernel OOPSes or reboots that don't seem to be related to
  643. anything, try disabling/enabling this option (or disabling/enabling
  644. APM in your BIOS).
  645. endmenu
  646. source "net/Kconfig"
  647. menu "Device Drivers"
  648. source "drivers/base/Kconfig"
  649. source "drivers/connector/Kconfig"
  650. if ALIGNMENT_TRAP
  651. source "drivers/mtd/Kconfig"
  652. endif
  653. source "drivers/parport/Kconfig"
  654. source "drivers/pnp/Kconfig"
  655. source "drivers/block/Kconfig"
  656. source "drivers/acorn/block/Kconfig"
  657. if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
  658. || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
  659. || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
  660. || ARCH_IXP23XX
  661. source "drivers/ide/Kconfig"
  662. endif
  663. source "drivers/scsi/Kconfig"
  664. source "drivers/md/Kconfig"
  665. source "drivers/message/fusion/Kconfig"
  666. source "drivers/ieee1394/Kconfig"
  667. source "drivers/message/i2o/Kconfig"
  668. source "drivers/net/Kconfig"
  669. source "drivers/isdn/Kconfig"
  670. # input before char - char/joystick depends on it. As does USB.
  671. source "drivers/input/Kconfig"
  672. source "drivers/char/Kconfig"
  673. source "drivers/i2c/Kconfig"
  674. source "drivers/spi/Kconfig"
  675. source "drivers/w1/Kconfig"
  676. source "drivers/hwmon/Kconfig"
  677. #source "drivers/l3/Kconfig"
  678. source "drivers/misc/Kconfig"
  679. source "drivers/mfd/Kconfig"
  680. source "drivers/leds/Kconfig"
  681. source "drivers/media/Kconfig"
  682. source "drivers/video/Kconfig"
  683. source "sound/Kconfig"
  684. source "drivers/usb/Kconfig"
  685. source "drivers/mmc/Kconfig"
  686. source "drivers/rtc/Kconfig"
  687. endmenu
  688. source "fs/Kconfig"
  689. source "arch/arm/oprofile/Kconfig"
  690. source "arch/arm/Kconfig.debug"
  691. source "security/Kconfig"
  692. source "crypto/Kconfig"
  693. source "lib/Kconfig"