Kconfig 24 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_CLPS7500
  74. bool "Cirrus-CL-PS7500FE"
  75. select TIMER_ACORN
  76. select ISA
  77. help
  78. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  79. config ARCH_CLPS711X
  80. bool "CLPS711x/EP721x-based"
  81. help
  82. Support for Cirrus Logic 711x/721x based boards.
  83. config ARCH_CO285
  84. bool "Co-EBSA285"
  85. select FOOTBRIDGE
  86. select FOOTBRIDGE_ADDIN
  87. help
  88. Support for Intel's EBSA285 companion chip.
  89. config ARCH_EBSA110
  90. bool "EBSA-110"
  91. select ISA
  92. help
  93. This is an evaluation board for the StrongARM processor available
  94. from Digital. It has limited hardware on-board, including an
  95. Ethernet interface, two PCMCIA sockets, two serial ports and a
  96. parallel port.
  97. config ARCH_EP93XX
  98. bool "EP93xx-based"
  99. select ARM_AMBA
  100. select ARM_VIC
  101. help
  102. This enables support for the Cirrus EP93xx series of CPUs.
  103. config ARCH_FOOTBRIDGE
  104. bool "FootBridge"
  105. select FOOTBRIDGE
  106. help
  107. Support for systems based on the DC21285 companion chip
  108. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  109. config ARCH_INTEGRATOR
  110. bool "Integrator"
  111. select ARM_AMBA
  112. select ICST525
  113. help
  114. Support for ARM's Integrator platform.
  115. config ARCH_IOP3XX
  116. bool "IOP3xx-based"
  117. select PCI
  118. help
  119. Support for Intel's IOP3XX (XScale) family of processors.
  120. config ARCH_IXP4XX
  121. bool "IXP4xx-based"
  122. select DMABOUNCE
  123. select PCI
  124. help
  125. Support for Intel's IXP4XX (XScale) family of processors.
  126. config ARCH_IXP2000
  127. bool "IXP2400/2800-based"
  128. select PCI
  129. help
  130. Support for Intel's IXP2400/2800 (XScale) family of processors.
  131. config ARCH_IXP23XX
  132. bool "IXP23XX-based"
  133. select PCI
  134. help
  135. Support for Intel's IXP23xx (XScale) family of processors.
  136. config ARCH_L7200
  137. bool "LinkUp-L7200"
  138. select FIQ
  139. help
  140. Say Y here if you intend to run this kernel on a LinkUp Systems
  141. L7200 Software Development Board which uses an ARM720T processor.
  142. Information on this board can be obtained at:
  143. <http://www.linkupsys.com/>
  144. If you have any questions or comments about the Linux kernel port
  145. to this board, send e-mail to <sjhill@cotw.com>.
  146. config ARCH_PXA
  147. bool "PXA2xx-based"
  148. select ARCH_MTD_XIP
  149. help
  150. Support for Intel's PXA2XX processor line.
  151. config ARCH_RPC
  152. bool "RiscPC"
  153. select ARCH_ACORN
  154. select FIQ
  155. select TIMER_ACORN
  156. select ARCH_MAY_HAVE_PC_FDC
  157. select ISA_DMA_API
  158. help
  159. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  160. CD-ROM interface, serial and parallel port, and the floppy drive.
  161. config ARCH_SA1100
  162. bool "SA1100-based"
  163. select ISA
  164. select ARCH_DISCONTIGMEM_ENABLE
  165. select ARCH_MTD_XIP
  166. help
  167. Support for StrongARM 11x0 based boards.
  168. config ARCH_S3C2410
  169. bool "Samsung S3C2410"
  170. help
  171. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  172. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  173. the Samsung SMDK2410 development board (and derivatives).
  174. config ARCH_SHARK
  175. bool "Shark"
  176. select ISA
  177. select ISA_DMA
  178. select PCI
  179. help
  180. Support for the StrongARM based Digital DNARD machine, also known
  181. as "Shark" (<http://www.shark-linux.de/shark.html>).
  182. config ARCH_LH7A40X
  183. bool "Sharp LH7A40X"
  184. help
  185. Say Y here for systems based on one of the Sharp LH7A40X
  186. System on a Chip processors. These CPUs include an ARM922T
  187. core with a wide array of integrated devices for
  188. hand-held and low-power applications.
  189. config ARCH_OMAP
  190. bool "TI OMAP"
  191. help
  192. Support for TI's OMAP platform (OMAP1 and OMAP2).
  193. config ARCH_VERSATILE
  194. bool "Versatile"
  195. select ARM_AMBA
  196. select ARM_VIC
  197. select ICST307
  198. help
  199. This enables support for ARM Ltd Versatile board.
  200. config ARCH_REALVIEW
  201. bool "RealView"
  202. select ARM_AMBA
  203. select ICST307
  204. help
  205. This enables support for ARM Ltd RealView boards.
  206. config ARCH_IMX
  207. bool "IMX"
  208. help
  209. Support for Motorola's i.MX family of processors (MX1, MXL).
  210. config ARCH_H720X
  211. bool "Hynix-HMS720x-based"
  212. select ISA_DMA_API
  213. help
  214. This enables support for systems based on the Hynix HMS720x
  215. config ARCH_AAEC2000
  216. bool "Agilent AAEC-2000 based"
  217. select ARM_AMBA
  218. help
  219. This enables support for systems based on the Agilent AAEC-2000
  220. config ARCH_AT91RM9200
  221. bool "AT91RM9200"
  222. help
  223. Say Y here if you intend to run this kernel on an Atmel
  224. AT91RM9200-based board.
  225. endchoice
  226. source "arch/arm/mach-clps711x/Kconfig"
  227. source "arch/arm/mach-ep93xx/Kconfig"
  228. source "arch/arm/mach-footbridge/Kconfig"
  229. source "arch/arm/mach-integrator/Kconfig"
  230. source "arch/arm/mach-iop3xx/Kconfig"
  231. source "arch/arm/mach-ixp4xx/Kconfig"
  232. source "arch/arm/mach-ixp2000/Kconfig"
  233. source "arch/arm/mach-ixp23xx/Kconfig"
  234. source "arch/arm/mach-pxa/Kconfig"
  235. source "arch/arm/mach-sa1100/Kconfig"
  236. source "arch/arm/plat-omap/Kconfig"
  237. source "arch/arm/mach-omap1/Kconfig"
  238. source "arch/arm/mach-omap2/Kconfig"
  239. source "arch/arm/mach-s3c2410/Kconfig"
  240. source "arch/arm/mach-lh7a40x/Kconfig"
  241. source "arch/arm/mach-imx/Kconfig"
  242. source "arch/arm/mach-h720x/Kconfig"
  243. source "arch/arm/mach-versatile/Kconfig"
  244. source "arch/arm/mach-aaec2000/Kconfig"
  245. source "arch/arm/mach-realview/Kconfig"
  246. source "arch/arm/mach-at91rm9200/Kconfig"
  247. # Definitions to make life easier
  248. config ARCH_ACORN
  249. bool
  250. source arch/arm/mm/Kconfig
  251. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  252. config XSCALE_PMU
  253. bool
  254. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  255. default y
  256. endmenu
  257. source "arch/arm/common/Kconfig"
  258. config FORCE_MAX_ZONEORDER
  259. int
  260. depends on SA1111
  261. default "9"
  262. menu "Bus support"
  263. config ARM_AMBA
  264. bool
  265. config ISA
  266. bool
  267. help
  268. Find out whether you have ISA slots on your motherboard. ISA is the
  269. name of a bus system, i.e. the way the CPU talks to the other stuff
  270. inside your box. Other bus systems are PCI, EISA, MicroChannel
  271. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  272. newer boards don't support it. If you have ISA, say Y, otherwise N.
  273. # Select ISA DMA controller support
  274. config ISA_DMA
  275. bool
  276. select ISA_DMA_API
  277. # Select ISA DMA interface
  278. config ISA_DMA_API
  279. bool
  280. config PCI
  281. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB
  282. help
  283. Find out whether you have a PCI motherboard. PCI is the name of a
  284. bus system, i.e. the way the CPU talks to the other stuff inside
  285. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  286. VESA. If you have PCI, say Y, otherwise N.
  287. The PCI-HOWTO, available from
  288. <http://www.tldp.org/docs.html#howto>, contains valuable
  289. information about which PCI hardware does work under Linux and which
  290. doesn't.
  291. # Select the host bridge type
  292. config PCI_HOST_VIA82C505
  293. bool
  294. depends on PCI && ARCH_SHARK
  295. default y
  296. source "drivers/pci/Kconfig"
  297. source "drivers/pcmcia/Kconfig"
  298. endmenu
  299. menu "Kernel Features"
  300. config SMP
  301. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  302. depends on EXPERIMENTAL && REALVIEW_MPCORE
  303. help
  304. This enables support for systems with more than one CPU. If you have
  305. a system with only one CPU, like most personal computers, say N. If
  306. you have a system with more than one CPU, say Y.
  307. If you say N here, the kernel will run on single and multiprocessor
  308. machines, but will use only one CPU of a multiprocessor machine. If
  309. you say Y here, the kernel will run on many, but not all, single
  310. processor machines. On a single processor machine, the kernel will
  311. run faster if you say N here.
  312. See also the <file:Documentation/smp.txt>,
  313. <file:Documentation/i386/IO-APIC.txt>,
  314. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  315. <http://www.linuxdoc.org/docs.html#howto>.
  316. If you don't know what to do here, say N.
  317. config NR_CPUS
  318. int "Maximum number of CPUs (2-32)"
  319. range 2 32
  320. depends on SMP
  321. default "4"
  322. config HOTPLUG_CPU
  323. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  324. depends on SMP && HOTPLUG && EXPERIMENTAL
  325. help
  326. Say Y here to experiment with turning CPUs off and on. CPUs
  327. can be controlled through /sys/devices/system/cpu.
  328. config LOCAL_TIMERS
  329. bool "Use local timer interrupts"
  330. depends on SMP && REALVIEW_MPCORE
  331. default y
  332. help
  333. Enable support for local timers on SMP platforms, rather then the
  334. legacy IPI broadcast method. Local timers allows the system
  335. accounting to be spread across the timer interval, preventing a
  336. "thundering herd" at every timer tick.
  337. config PREEMPT
  338. bool "Preemptible Kernel (EXPERIMENTAL)"
  339. depends on EXPERIMENTAL
  340. help
  341. This option reduces the latency of the kernel when reacting to
  342. real-time or interactive events by allowing a low priority process to
  343. be preempted even if it is in kernel mode executing a system call.
  344. This allows applications to run more reliably even when the system is
  345. under load.
  346. Say Y here if you are building a kernel for a desktop, embedded
  347. or real-time system. Say N if you are unsure.
  348. config NO_IDLE_HZ
  349. bool "Dynamic tick timer"
  350. help
  351. Select this option if you want to disable continuous timer ticks
  352. and have them programmed to occur as required. This option saves
  353. power as the system can remain in idle state for longer.
  354. By default dynamic tick is disabled during the boot, and can be
  355. manually enabled with:
  356. echo 1 > /sys/devices/system/timer/timer0/dyn_tick
  357. Alternatively, if you want dynamic tick automatically enabled
  358. during boot, pass "dyntick=enable" via the kernel command string.
  359. Please note that dynamic tick may affect the accuracy of
  360. timekeeping on some platforms depending on the implementation.
  361. Currently at least OMAP, PXA2xx and SA11x0 platforms are known
  362. to have accurate timekeeping with dynamic tick.
  363. config HZ
  364. int
  365. default 128 if ARCH_L7200
  366. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  367. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  368. default 100
  369. config AEABI
  370. bool "Use the ARM EABI to compile the kernel"
  371. help
  372. This option allows for the kernel to be compiled using the latest
  373. ARM ABI (aka EABI). This is only useful if you are using a user
  374. space environment that is also compiled with EABI.
  375. Since there are major incompatibilities between the legacy ABI and
  376. EABI, especially with regard to structure member alignment, this
  377. option also changes the kernel syscall calling convention to
  378. disambiguate both ABIs and allow for backward compatibility support
  379. (selected with CONFIG_OABI_COMPAT).
  380. To use this you need GCC version 4.0.0 or later.
  381. config OABI_COMPAT
  382. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  383. depends on AEABI && EXPERIMENTAL
  384. default y
  385. help
  386. This option preserves the old syscall interface along with the
  387. new (ARM EABI) one. It also provides a compatibility layer to
  388. intercept syscalls that have structure arguments which layout
  389. in memory differs between the legacy ABI and the new ARM EABI
  390. (only for non "thumb" binaries). This option adds a tiny
  391. overhead to all syscalls and produces a slightly larger kernel.
  392. If you know you'll be using only pure EABI user space then you
  393. can say N here. If this option is not selected and you attempt
  394. to execute a legacy ABI binary then the result will be
  395. UNPREDICTABLE (in fact it can be predicted that it won't work
  396. at all). If in doubt say Y.
  397. config ARCH_DISCONTIGMEM_ENABLE
  398. bool
  399. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  400. help
  401. Say Y to support efficient handling of discontiguous physical memory,
  402. for architectures which are either NUMA (Non-Uniform Memory Access)
  403. or have huge holes in the physical address space for other reasons.
  404. See <file:Documentation/vm/numa> for more.
  405. config NODES_SHIFT
  406. int
  407. default "4" if ARCH_LH7A40X
  408. default "2"
  409. depends on NEED_MULTIPLE_NODES
  410. source "mm/Kconfig"
  411. config LEDS
  412. bool "Timer and CPU usage LEDs"
  413. depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
  414. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  415. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  416. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  417. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  418. ARCH_AT91RM9200
  419. help
  420. If you say Y here, the LEDs on your machine will be used
  421. to provide useful information about your current system status.
  422. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  423. be able to select which LEDs are active using the options below. If
  424. you are compiling a kernel for the EBSA-110 or the LART however, the
  425. red LED will simply flash regularly to indicate that the system is
  426. still functional. It is safe to say Y here if you have a CATS
  427. system, but the driver will do nothing.
  428. config LEDS_TIMER
  429. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  430. MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  431. depends on LEDS
  432. default y if ARCH_EBSA110
  433. help
  434. If you say Y here, one of the system LEDs (the green one on the
  435. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  436. will flash regularly to indicate that the system is still
  437. operational. This is mainly useful to kernel hackers who are
  438. debugging unstable kernels.
  439. The LART uses the same LED for both Timer LED and CPU usage LED
  440. functions. You may choose to use both, but the Timer LED function
  441. will overrule the CPU usage LED.
  442. config LEDS_CPU
  443. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  444. !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  445. depends on LEDS
  446. help
  447. If you say Y here, the red LED will be used to give a good real
  448. time indication of CPU usage, by lighting whenever the idle task
  449. is not currently executing.
  450. The LART uses the same LED for both Timer LED and CPU usage LED
  451. functions. You may choose to use both, but the Timer LED function
  452. will overrule the CPU usage LED.
  453. config ALIGNMENT_TRAP
  454. bool
  455. default y if !ARCH_EBSA110
  456. help
  457. ARM processors can not fetch/store information which is not
  458. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  459. address divisible by 4. On 32-bit ARM processors, these non-aligned
  460. fetch/store instructions will be emulated in software if you say
  461. here, which has a severe performance impact. This is necessary for
  462. correct operation of some network protocols. With an IP-only
  463. configuration it is safe to say N, otherwise say Y.
  464. endmenu
  465. menu "Boot options"
  466. # Compressed boot loader in ROM. Yes, we really want to ask about
  467. # TEXT and BSS so we preserve their values in the config files.
  468. config ZBOOT_ROM_TEXT
  469. hex "Compressed ROM boot loader base address"
  470. default "0"
  471. help
  472. The physical address at which the ROM-able zImage is to be
  473. placed in the target. Platforms which normally make use of
  474. ROM-able zImage formats normally set this to a suitable
  475. value in their defconfig file.
  476. If ZBOOT_ROM is not enabled, this has no effect.
  477. config ZBOOT_ROM_BSS
  478. hex "Compressed ROM boot loader BSS address"
  479. default "0"
  480. help
  481. The base address of 64KiB of read/write memory in the target
  482. for the ROM-able zImage, which must be available while the
  483. decompressor is running. Platforms which normally make use of
  484. ROM-able zImage formats normally set this to a suitable
  485. value in their defconfig file.
  486. If ZBOOT_ROM is not enabled, this has no effect.
  487. config ZBOOT_ROM
  488. bool "Compressed boot loader in ROM/flash"
  489. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  490. help
  491. Say Y here if you intend to execute your compressed kernel image
  492. (zImage) directly from ROM or flash. If unsure, say N.
  493. config CMDLINE
  494. string "Default kernel command string"
  495. default ""
  496. help
  497. On some architectures (EBSA110 and CATS), there is currently no way
  498. for the boot loader to pass arguments to the kernel. For these
  499. architectures, you should supply some command-line options at build
  500. time by entering them here. As a minimum, you should specify the
  501. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  502. config XIP_KERNEL
  503. bool "Kernel Execute-In-Place from ROM"
  504. depends on !ZBOOT_ROM
  505. help
  506. Execute-In-Place allows the kernel to run from non-volatile storage
  507. directly addressable by the CPU, such as NOR flash. This saves RAM
  508. space since the text section of the kernel is not loaded from flash
  509. to RAM. Read-write sections, such as the data section and stack,
  510. are still copied to RAM. The XIP kernel is not compressed since
  511. it has to run directly from flash, so it will take more space to
  512. store it. The flash address used to link the kernel object files,
  513. and for storing it, is configuration dependent. Therefore, if you
  514. say Y here, you must know the proper physical address where to
  515. store the kernel image depending on your own flash memory usage.
  516. Also note that the make target becomes "make xipImage" rather than
  517. "make zImage" or "make Image". The final kernel binary to put in
  518. ROM memory will be arch/arm/boot/xipImage.
  519. If unsure, say N.
  520. config XIP_PHYS_ADDR
  521. hex "XIP Kernel Physical Location"
  522. depends on XIP_KERNEL
  523. default "0x00080000"
  524. help
  525. This is the physical address in your flash memory the kernel will
  526. be linked for and stored to. This address is dependent on your
  527. own flash usage.
  528. endmenu
  529. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1)
  530. menu "CPU Frequency scaling"
  531. source "drivers/cpufreq/Kconfig"
  532. config CPU_FREQ_SA1100
  533. bool
  534. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  535. default y
  536. config CPU_FREQ_SA1110
  537. bool
  538. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  539. default y
  540. config CPU_FREQ_INTEGRATOR
  541. tristate "CPUfreq driver for ARM Integrator CPUs"
  542. depends on ARCH_INTEGRATOR && CPU_FREQ
  543. default y
  544. help
  545. This enables the CPUfreq driver for ARM Integrator CPUs.
  546. For details, take a look at <file:Documentation/cpu-freq>.
  547. If in doubt, say Y.
  548. endmenu
  549. endif
  550. menu "Floating point emulation"
  551. comment "At least one emulation must be selected"
  552. config FPE_NWFPE
  553. bool "NWFPE math emulation"
  554. depends on !AEABI || OABI_COMPAT
  555. ---help---
  556. Say Y to include the NWFPE floating point emulator in the kernel.
  557. This is necessary to run most binaries. Linux does not currently
  558. support floating point hardware so you need to say Y here even if
  559. your machine has an FPA or floating point co-processor podule.
  560. You may say N here if you are going to load the Acorn FPEmulator
  561. early in the bootup.
  562. config FPE_NWFPE_XP
  563. bool "Support extended precision"
  564. depends on FPE_NWFPE
  565. help
  566. Say Y to include 80-bit support in the kernel floating-point
  567. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  568. Note that gcc does not generate 80-bit operations by default,
  569. so in most cases this option only enlarges the size of the
  570. floating point emulator without any good reason.
  571. You almost surely want to say N here.
  572. config FPE_FASTFPE
  573. bool "FastFPE math emulation (EXPERIMENTAL)"
  574. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  575. ---help---
  576. Say Y here to include the FAST floating point emulator in the kernel.
  577. This is an experimental much faster emulator which now also has full
  578. precision for the mantissa. It does not support any exceptions.
  579. It is very simple, and approximately 3-6 times faster than NWFPE.
  580. It should be sufficient for most programs. It may be not suitable
  581. for scientific calculations, but you have to check this for yourself.
  582. If you do not feel you need a faster FP emulation you should better
  583. choose NWFPE.
  584. config VFP
  585. bool "VFP-format floating point maths"
  586. depends on CPU_V6 || CPU_ARM926T
  587. help
  588. Say Y to include VFP support code in the kernel. This is needed
  589. if your hardware includes a VFP unit.
  590. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  591. release notes and additional status information.
  592. Say N if your target does not have VFP hardware.
  593. endmenu
  594. menu "Userspace binary formats"
  595. source "fs/Kconfig.binfmt"
  596. config ARTHUR
  597. tristate "RISC OS personality"
  598. depends on !AEABI
  599. help
  600. Say Y here to include the kernel code necessary if you want to run
  601. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  602. experimental; if this sounds frightening, say N and sleep in peace.
  603. You can also say M here to compile this support as a module (which
  604. will be called arthur).
  605. endmenu
  606. menu "Power management options"
  607. source "kernel/power/Kconfig"
  608. config APM
  609. tristate "Advanced Power Management Emulation"
  610. ---help---
  611. APM is a BIOS specification for saving power using several different
  612. techniques. This is mostly useful for battery powered laptops with
  613. APM compliant BIOSes. If you say Y here, the system time will be
  614. reset after a RESUME operation, the /proc/apm device will provide
  615. battery status information, and user-space programs will receive
  616. notification of APM "events" (e.g. battery status change).
  617. In order to use APM, you will need supporting software. For location
  618. and more information, read <file:Documentation/pm.txt> and the
  619. Battery Powered Linux mini-HOWTO, available from
  620. <http://www.tldp.org/docs.html#howto>.
  621. This driver does not spin down disk drives (see the hdparm(8)
  622. manpage ("man 8 hdparm") for that), and it doesn't turn off
  623. VESA-compliant "green" monitors.
  624. Generally, if you don't have a battery in your machine, there isn't
  625. much point in using this driver and you should say N. If you get
  626. random kernel OOPSes or reboots that don't seem to be related to
  627. anything, try disabling/enabling this option (or disabling/enabling
  628. APM in your BIOS).
  629. endmenu
  630. source "net/Kconfig"
  631. menu "Device Drivers"
  632. source "drivers/base/Kconfig"
  633. source "drivers/connector/Kconfig"
  634. if ALIGNMENT_TRAP
  635. source "drivers/mtd/Kconfig"
  636. endif
  637. source "drivers/parport/Kconfig"
  638. source "drivers/pnp/Kconfig"
  639. source "drivers/block/Kconfig"
  640. source "drivers/acorn/block/Kconfig"
  641. if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
  642. || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
  643. || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
  644. || ARCH_IXP23XX
  645. source "drivers/ide/Kconfig"
  646. endif
  647. source "drivers/scsi/Kconfig"
  648. source "drivers/md/Kconfig"
  649. source "drivers/message/fusion/Kconfig"
  650. source "drivers/ieee1394/Kconfig"
  651. source "drivers/message/i2o/Kconfig"
  652. source "drivers/net/Kconfig"
  653. source "drivers/isdn/Kconfig"
  654. # input before char - char/joystick depends on it. As does USB.
  655. source "drivers/input/Kconfig"
  656. source "drivers/char/Kconfig"
  657. source "drivers/i2c/Kconfig"
  658. source "drivers/spi/Kconfig"
  659. source "drivers/w1/Kconfig"
  660. source "drivers/hwmon/Kconfig"
  661. #source "drivers/l3/Kconfig"
  662. source "drivers/misc/Kconfig"
  663. source "drivers/mfd/Kconfig"
  664. source "drivers/leds/Kconfig"
  665. source "drivers/media/Kconfig"
  666. source "drivers/video/Kconfig"
  667. source "sound/Kconfig"
  668. source "drivers/usb/Kconfig"
  669. source "drivers/mmc/Kconfig"
  670. source "drivers/rtc/Kconfig"
  671. endmenu
  672. source "fs/Kconfig"
  673. source "arch/arm/oprofile/Kconfig"
  674. source "arch/arm/Kconfig.debug"
  675. source "security/Kconfig"
  676. source "crypto/Kconfig"
  677. source "lib/Kconfig"