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