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 GENERIC_HARDIRQS
  41. bool
  42. default y
  43. config HARDIRQS_SW_RESEND
  44. bool
  45. default y
  46. config GENERIC_IRQ_PROBE
  47. bool
  48. default y
  49. config RWSEM_GENERIC_SPINLOCK
  50. bool
  51. default y
  52. config RWSEM_XCHGADD_ALGORITHM
  53. bool
  54. config GENERIC_HWEIGHT
  55. bool
  56. default y
  57. config GENERIC_CALIBRATE_DELAY
  58. bool
  59. default y
  60. config GENERIC_BUST_SPINLOCK
  61. bool
  62. config ARCH_MAY_HAVE_PC_FDC
  63. bool
  64. config GENERIC_ISA_DMA
  65. bool
  66. config FIQ
  67. bool
  68. config ARCH_MTD_XIP
  69. bool
  70. config VECTORS_BASE
  71. hex
  72. default 0xffff0000 if MMU
  73. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  74. default 0x00000000
  75. help
  76. The base address of exception vectors.
  77. source "init/Kconfig"
  78. menu "System Type"
  79. choice
  80. prompt "ARM system type"
  81. default ARCH_VERSATILE
  82. config ARCH_AAEC2000
  83. bool "Agilent AAEC-2000 based"
  84. select ARM_AMBA
  85. help
  86. This enables support for systems based on the Agilent AAEC-2000
  87. config ARCH_INTEGRATOR
  88. bool "ARM Ltd. Integrator family"
  89. select ARM_AMBA
  90. select ICST525
  91. help
  92. Support for ARM's Integrator platform.
  93. config ARCH_REALVIEW
  94. bool "ARM Ltd. RealView family"
  95. select ARM_AMBA
  96. select ICST307
  97. help
  98. This enables support for ARM Ltd RealView boards.
  99. config ARCH_VERSATILE
  100. bool "ARM Ltd. Versatile family"
  101. select ARM_AMBA
  102. select ARM_VIC
  103. select ICST307
  104. help
  105. This enables support for ARM Ltd Versatile board.
  106. config ARCH_AT91
  107. bool "Atmel AT91"
  108. help
  109. This enables support for systems based on the Atmel AT91RM9200
  110. and AT91SAM9xxx processors.
  111. config ARCH_CLPS7500
  112. bool "Cirrus CL-PS7500FE"
  113. select TIMER_ACORN
  114. select ISA
  115. help
  116. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  117. config ARCH_CLPS711X
  118. bool "Cirrus Logic CLPS711x/EP721x-based"
  119. help
  120. Support for Cirrus Logic 711x/721x based boards.
  121. config ARCH_CO285
  122. bool "Co-EBSA285"
  123. select FOOTBRIDGE
  124. select FOOTBRIDGE_ADDIN
  125. help
  126. Support for Intel's EBSA285 companion chip.
  127. config ARCH_EBSA110
  128. bool "EBSA-110"
  129. select ISA
  130. help
  131. This is an evaluation board for the StrongARM processor available
  132. from Digital. It has limited hardware on-board, including an
  133. Ethernet interface, two PCMCIA sockets, two serial ports and a
  134. parallel port.
  135. config ARCH_EP93XX
  136. bool "EP93xx-based"
  137. select ARM_AMBA
  138. select ARM_VIC
  139. help
  140. This enables support for the Cirrus EP93xx series of CPUs.
  141. config ARCH_FOOTBRIDGE
  142. bool "FootBridge"
  143. select FOOTBRIDGE
  144. help
  145. Support for systems based on the DC21285 companion chip
  146. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  147. config ARCH_NETX
  148. bool "Hilscher NetX based"
  149. select ARM_VIC
  150. help
  151. This enables support for systems based on the Hilscher NetX Soc
  152. config ARCH_H720X
  153. bool "Hynix HMS720x-based"
  154. select ISA_DMA_API
  155. help
  156. This enables support for systems based on the Hynix HMS720x
  157. config ARCH_IMX
  158. bool "IMX"
  159. help
  160. Support for Motorola's i.MX family of processors (MX1, MXL).
  161. config ARCH_IOP3XX
  162. bool "IOP3xx-based"
  163. depends on MMU
  164. select PCI
  165. help
  166. Support for Intel's IOP3XX (XScale) family of processors.
  167. config ARCH_IXP4XX
  168. bool "IXP4xx-based"
  169. depends on MMU
  170. help
  171. Support for Intel's IXP4XX (XScale) family of processors.
  172. config ARCH_IXP2000
  173. bool "IXP2400/2800-based"
  174. depends on MMU
  175. select PCI
  176. help
  177. Support for Intel's IXP2400/2800 (XScale) family of processors.
  178. config ARCH_IXP23XX
  179. bool "IXP23XX-based"
  180. depends on MMU
  181. select PCI
  182. help
  183. Support for Intel's IXP23xx (XScale) family of processors.
  184. config ARCH_L7200
  185. bool "LinkUp-L7200"
  186. select FIQ
  187. help
  188. Say Y here if you intend to run this kernel on a LinkUp Systems
  189. L7200 Software Development Board which uses an ARM720T processor.
  190. Information on this board can be obtained at:
  191. <http://www.linkupsys.com/>
  192. If you have any questions or comments about the Linux kernel port
  193. to this board, send e-mail to <sjhill@cotw.com>.
  194. config ARCH_PNX4008
  195. bool "Philips Nexperia PNX4008 Mobile"
  196. help
  197. This enables support for Philips PNX4008 mobile platform.
  198. config ARCH_PXA
  199. bool "PXA2xx-based"
  200. depends on MMU
  201. select ARCH_MTD_XIP
  202. help
  203. Support for Intel's PXA2XX processor line.
  204. config ARCH_RPC
  205. bool "RiscPC"
  206. select ARCH_ACORN
  207. select FIQ
  208. select TIMER_ACORN
  209. select ARCH_MAY_HAVE_PC_FDC
  210. select ISA_DMA_API
  211. help
  212. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  213. CD-ROM interface, serial and parallel port, and the floppy drive.
  214. config ARCH_SA1100
  215. bool "SA1100-based"
  216. select ISA
  217. select ARCH_DISCONTIGMEM_ENABLE
  218. select ARCH_MTD_XIP
  219. help
  220. Support for StrongARM 11x0 based boards.
  221. config ARCH_S3C2410
  222. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
  223. help
  224. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  225. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  226. the Samsung SMDK2410 development board (and derivatives).
  227. config ARCH_SHARK
  228. bool "Shark"
  229. select ISA
  230. select ISA_DMA
  231. select PCI
  232. help
  233. Support for the StrongARM based Digital DNARD machine, also known
  234. as "Shark" (<http://www.shark-linux.de/shark.html>).
  235. config ARCH_LH7A40X
  236. bool "Sharp LH7A40X"
  237. help
  238. Say Y here for systems based on one of the Sharp LH7A40X
  239. System on a Chip processors. These CPUs include an ARM922T
  240. core with a wide array of integrated devices for
  241. hand-held and low-power applications.
  242. config ARCH_OMAP
  243. bool "TI OMAP"
  244. help
  245. Support for TI's OMAP platform (OMAP1 and OMAP2).
  246. endchoice
  247. source "arch/arm/mach-clps711x/Kconfig"
  248. source "arch/arm/mach-ep93xx/Kconfig"
  249. source "arch/arm/mach-footbridge/Kconfig"
  250. source "arch/arm/mach-integrator/Kconfig"
  251. source "arch/arm/mach-iop3xx/Kconfig"
  252. source "arch/arm/mach-ixp4xx/Kconfig"
  253. source "arch/arm/mach-ixp2000/Kconfig"
  254. source "arch/arm/mach-ixp23xx/Kconfig"
  255. source "arch/arm/mach-pxa/Kconfig"
  256. source "arch/arm/mach-sa1100/Kconfig"
  257. source "arch/arm/plat-omap/Kconfig"
  258. source "arch/arm/mach-omap1/Kconfig"
  259. source "arch/arm/mach-omap2/Kconfig"
  260. source "arch/arm/mach-s3c2410/Kconfig"
  261. source "arch/arm/mach-lh7a40x/Kconfig"
  262. source "arch/arm/mach-imx/Kconfig"
  263. source "arch/arm/mach-h720x/Kconfig"
  264. source "arch/arm/mach-versatile/Kconfig"
  265. source "arch/arm/mach-aaec2000/Kconfig"
  266. source "arch/arm/mach-realview/Kconfig"
  267. source "arch/arm/mach-at91rm9200/Kconfig"
  268. source "arch/arm/mach-netx/Kconfig"
  269. # Definitions to make life easier
  270. config ARCH_ACORN
  271. bool
  272. source arch/arm/mm/Kconfig
  273. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  274. config XSCALE_PMU
  275. bool
  276. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  277. default y
  278. if !MMU
  279. source "arch/arm/Kconfig-nommu"
  280. endif
  281. endmenu
  282. source "arch/arm/common/Kconfig"
  283. config FORCE_MAX_ZONEORDER
  284. int
  285. depends on SA1111
  286. default "9"
  287. menu "Bus support"
  288. config ARM_AMBA
  289. bool
  290. config ISA
  291. bool
  292. help
  293. Find out whether you have ISA slots on your motherboard. ISA is the
  294. name of a bus system, i.e. the way the CPU talks to the other stuff
  295. inside your box. Other bus systems are PCI, EISA, MicroChannel
  296. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  297. newer boards don't support it. If you have ISA, say Y, otherwise N.
  298. # Select ISA DMA controller support
  299. config ISA_DMA
  300. bool
  301. select ISA_DMA_API
  302. # Select ISA DMA interface
  303. config ISA_DMA_API
  304. bool
  305. config PCI
  306. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
  307. help
  308. Find out whether you have a PCI motherboard. PCI is the name of a
  309. bus system, i.e. the way the CPU talks to the other stuff inside
  310. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  311. VESA. If you have PCI, say Y, otherwise N.
  312. The PCI-HOWTO, available from
  313. <http://www.tldp.org/docs.html#howto>, contains valuable
  314. information about which PCI hardware does work under Linux and which
  315. doesn't.
  316. # Select the host bridge type
  317. config PCI_HOST_VIA82C505
  318. bool
  319. depends on PCI && ARCH_SHARK
  320. default y
  321. source "drivers/pci/Kconfig"
  322. source "drivers/pcmcia/Kconfig"
  323. endmenu
  324. menu "Kernel Features"
  325. config SMP
  326. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  327. depends on EXPERIMENTAL && REALVIEW_MPCORE
  328. help
  329. This enables support for systems with more than one CPU. If you have
  330. a system with only one CPU, like most personal computers, say N. If
  331. you have a system with more than one CPU, say Y.
  332. If you say N here, the kernel will run on single and multiprocessor
  333. machines, but will use only one CPU of a multiprocessor machine. If
  334. you say Y here, the kernel will run on many, but not all, single
  335. processor machines. On a single processor machine, the kernel will
  336. run faster if you say N here.
  337. See also the <file:Documentation/smp.txt>,
  338. <file:Documentation/i386/IO-APIC.txt>,
  339. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  340. <http://www.linuxdoc.org/docs.html#howto>.
  341. If you don't know what to do here, say N.
  342. config NR_CPUS
  343. int "Maximum number of CPUs (2-32)"
  344. range 2 32
  345. depends on SMP
  346. default "4"
  347. config HOTPLUG_CPU
  348. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  349. depends on SMP && HOTPLUG && EXPERIMENTAL
  350. help
  351. Say Y here to experiment with turning CPUs off and on. CPUs
  352. can be controlled through /sys/devices/system/cpu.
  353. config LOCAL_TIMERS
  354. bool "Use local timer interrupts"
  355. depends on SMP && REALVIEW_MPCORE
  356. default y
  357. help
  358. Enable support for local timers on SMP platforms, rather then the
  359. legacy IPI broadcast method. Local timers allows the system
  360. accounting to be spread across the timer interval, preventing a
  361. "thundering herd" at every timer tick.
  362. config PREEMPT
  363. bool "Preemptible Kernel (EXPERIMENTAL)"
  364. depends on EXPERIMENTAL
  365. help
  366. This option reduces the latency of the kernel when reacting to
  367. real-time or interactive events by allowing a low priority process to
  368. be preempted even if it is in kernel mode executing a system call.
  369. This allows applications to run more reliably even when the system is
  370. under load.
  371. Say Y here if you are building a kernel for a desktop, embedded
  372. or real-time system. Say N if you are unsure.
  373. config NO_IDLE_HZ
  374. bool "Dynamic tick timer"
  375. help
  376. Select this option if you want to disable continuous timer ticks
  377. and have them programmed to occur as required. This option saves
  378. power as the system can remain in idle state for longer.
  379. By default dynamic tick is disabled during the boot, and can be
  380. manually enabled with:
  381. echo 1 > /sys/devices/system/timer/timer0/dyn_tick
  382. Alternatively, if you want dynamic tick automatically enabled
  383. during boot, pass "dyntick=enable" via the kernel command string.
  384. Please note that dynamic tick may affect the accuracy of
  385. timekeeping on some platforms depending on the implementation.
  386. Currently at least OMAP, PXA2xx and SA11x0 platforms are known
  387. to have accurate timekeeping with dynamic tick.
  388. config HZ
  389. int
  390. default 128 if ARCH_L7200
  391. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  392. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  393. default 100
  394. config AEABI
  395. bool "Use the ARM EABI to compile the kernel"
  396. help
  397. This option allows for the kernel to be compiled using the latest
  398. ARM ABI (aka EABI). This is only useful if you are using a user
  399. space environment that is also compiled with EABI.
  400. Since there are major incompatibilities between the legacy ABI and
  401. EABI, especially with regard to structure member alignment, this
  402. option also changes the kernel syscall calling convention to
  403. disambiguate both ABIs and allow for backward compatibility support
  404. (selected with CONFIG_OABI_COMPAT).
  405. To use this you need GCC version 4.0.0 or later.
  406. config OABI_COMPAT
  407. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  408. depends on AEABI && EXPERIMENTAL
  409. default y
  410. help
  411. This option preserves the old syscall interface along with the
  412. new (ARM EABI) one. It also provides a compatibility layer to
  413. intercept syscalls that have structure arguments which layout
  414. in memory differs between the legacy ABI and the new ARM EABI
  415. (only for non "thumb" binaries). This option adds a tiny
  416. overhead to all syscalls and produces a slightly larger kernel.
  417. If you know you'll be using only pure EABI user space then you
  418. can say N here. If this option is not selected and you attempt
  419. to execute a legacy ABI binary then the result will be
  420. UNPREDICTABLE (in fact it can be predicted that it won't work
  421. at all). If in doubt say Y.
  422. config ARCH_DISCONTIGMEM_ENABLE
  423. bool
  424. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  425. help
  426. Say Y to support efficient handling of discontiguous physical memory,
  427. for architectures which are either NUMA (Non-Uniform Memory Access)
  428. or have huge holes in the physical address space for other reasons.
  429. See <file:Documentation/vm/numa> for more.
  430. config NODES_SHIFT
  431. int
  432. default "4" if ARCH_LH7A40X
  433. default "2"
  434. depends on NEED_MULTIPLE_NODES
  435. source "mm/Kconfig"
  436. config LEDS
  437. bool "Timer and CPU usage LEDs"
  438. depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
  439. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  440. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  441. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  442. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  443. ARCH_AT91RM9200 || MACH_TRIZEPS4
  444. help
  445. If you say Y here, the LEDs on your machine will be used
  446. to provide useful information about your current system status.
  447. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  448. be able to select which LEDs are active using the options below. If
  449. you are compiling a kernel for the EBSA-110 or the LART however, the
  450. red LED will simply flash regularly to indicate that the system is
  451. still functional. It is safe to say Y here if you have a CATS
  452. system, but the driver will do nothing.
  453. config LEDS_TIMER
  454. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  455. MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  456. depends on LEDS
  457. default y if ARCH_EBSA110
  458. help
  459. If you say Y here, one of the system LEDs (the green one on the
  460. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  461. will flash regularly to indicate that the system is still
  462. operational. This is mainly useful to kernel hackers who are
  463. debugging unstable kernels.
  464. The LART uses the same LED for both Timer LED and CPU usage LED
  465. functions. You may choose to use both, but the Timer LED function
  466. will overrule the CPU usage LED.
  467. config LEDS_CPU
  468. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  469. !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  470. depends on LEDS
  471. help
  472. If you say Y here, the red LED will be used to give a good real
  473. time indication of CPU usage, by lighting whenever the idle task
  474. is not currently executing.
  475. The LART uses the same LED for both Timer LED and CPU usage LED
  476. functions. You may choose to use both, but the Timer LED function
  477. will overrule the CPU usage LED.
  478. config ALIGNMENT_TRAP
  479. bool
  480. default y if !ARCH_EBSA110
  481. help
  482. ARM processors can not fetch/store information which is not
  483. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  484. address divisible by 4. On 32-bit ARM processors, these non-aligned
  485. fetch/store instructions will be emulated in software if you say
  486. here, which has a severe performance impact. This is necessary for
  487. correct operation of some network protocols. With an IP-only
  488. configuration it is safe to say N, otherwise say Y.
  489. endmenu
  490. menu "Boot options"
  491. # Compressed boot loader in ROM. Yes, we really want to ask about
  492. # TEXT and BSS so we preserve their values in the config files.
  493. config ZBOOT_ROM_TEXT
  494. hex "Compressed ROM boot loader base address"
  495. default "0"
  496. help
  497. The physical address at which the ROM-able zImage is to be
  498. placed in the target. Platforms which normally make use of
  499. ROM-able zImage formats normally set this to a suitable
  500. value in their defconfig file.
  501. If ZBOOT_ROM is not enabled, this has no effect.
  502. config ZBOOT_ROM_BSS
  503. hex "Compressed ROM boot loader BSS address"
  504. default "0"
  505. help
  506. The base address of 64KiB of read/write memory in the target
  507. for the ROM-able zImage, which must be available while the
  508. decompressor is running. Platforms which normally make use of
  509. ROM-able zImage formats normally set this to a suitable
  510. value in their defconfig file.
  511. If ZBOOT_ROM is not enabled, this has no effect.
  512. config ZBOOT_ROM
  513. bool "Compressed boot loader in ROM/flash"
  514. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  515. help
  516. Say Y here if you intend to execute your compressed kernel image
  517. (zImage) directly from ROM or flash. If unsure, say N.
  518. config CMDLINE
  519. string "Default kernel command string"
  520. default ""
  521. help
  522. On some architectures (EBSA110 and CATS), there is currently no way
  523. for the boot loader to pass arguments to the kernel. For these
  524. architectures, you should supply some command-line options at build
  525. time by entering them here. As a minimum, you should specify the
  526. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  527. config XIP_KERNEL
  528. bool "Kernel Execute-In-Place from ROM"
  529. depends on !ZBOOT_ROM
  530. help
  531. Execute-In-Place allows the kernel to run from non-volatile storage
  532. directly addressable by the CPU, such as NOR flash. This saves RAM
  533. space since the text section of the kernel is not loaded from flash
  534. to RAM. Read-write sections, such as the data section and stack,
  535. are still copied to RAM. The XIP kernel is not compressed since
  536. it has to run directly from flash, so it will take more space to
  537. store it. The flash address used to link the kernel object files,
  538. and for storing it, is configuration dependent. Therefore, if you
  539. say Y here, you must know the proper physical address where to
  540. store the kernel image depending on your own flash memory usage.
  541. Also note that the make target becomes "make xipImage" rather than
  542. "make zImage" or "make Image". The final kernel binary to put in
  543. ROM memory will be arch/arm/boot/xipImage.
  544. If unsure, say N.
  545. config XIP_PHYS_ADDR
  546. hex "XIP Kernel Physical Location"
  547. depends on XIP_KERNEL
  548. default "0x00080000"
  549. help
  550. This is the physical address in your flash memory the kernel will
  551. be linked for and stored to. This address is dependent on your
  552. own flash usage.
  553. endmenu
  554. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP)
  555. menu "CPU Frequency scaling"
  556. source "drivers/cpufreq/Kconfig"
  557. config CPU_FREQ_SA1100
  558. bool
  559. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  560. default y
  561. config CPU_FREQ_SA1110
  562. bool
  563. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  564. default y
  565. config CPU_FREQ_INTEGRATOR
  566. tristate "CPUfreq driver for ARM Integrator CPUs"
  567. depends on ARCH_INTEGRATOR && CPU_FREQ
  568. default y
  569. help
  570. This enables the CPUfreq driver for ARM Integrator CPUs.
  571. For details, take a look at <file:Documentation/cpu-freq>.
  572. If in doubt, say Y.
  573. endmenu
  574. endif
  575. menu "Floating point emulation"
  576. comment "At least one emulation must be selected"
  577. config FPE_NWFPE
  578. bool "NWFPE math emulation"
  579. depends on !AEABI || OABI_COMPAT
  580. ---help---
  581. Say Y to include the NWFPE floating point emulator in the kernel.
  582. This is necessary to run most binaries. Linux does not currently
  583. support floating point hardware so you need to say Y here even if
  584. your machine has an FPA or floating point co-processor podule.
  585. You may say N here if you are going to load the Acorn FPEmulator
  586. early in the bootup.
  587. config FPE_NWFPE_XP
  588. bool "Support extended precision"
  589. depends on FPE_NWFPE
  590. help
  591. Say Y to include 80-bit support in the kernel floating-point
  592. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  593. Note that gcc does not generate 80-bit operations by default,
  594. so in most cases this option only enlarges the size of the
  595. floating point emulator without any good reason.
  596. You almost surely want to say N here.
  597. config FPE_FASTFPE
  598. bool "FastFPE math emulation (EXPERIMENTAL)"
  599. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  600. ---help---
  601. Say Y here to include the FAST floating point emulator in the kernel.
  602. This is an experimental much faster emulator which now also has full
  603. precision for the mantissa. It does not support any exceptions.
  604. It is very simple, and approximately 3-6 times faster than NWFPE.
  605. It should be sufficient for most programs. It may be not suitable
  606. for scientific calculations, but you have to check this for yourself.
  607. If you do not feel you need a faster FP emulation you should better
  608. choose NWFPE.
  609. config VFP
  610. bool "VFP-format floating point maths"
  611. depends on CPU_V6 || CPU_ARM926T
  612. help
  613. Say Y to include VFP support code in the kernel. This is needed
  614. if your hardware includes a VFP unit.
  615. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  616. release notes and additional status information.
  617. Say N if your target does not have VFP hardware.
  618. endmenu
  619. menu "Userspace binary formats"
  620. source "fs/Kconfig.binfmt"
  621. config ARTHUR
  622. tristate "RISC OS personality"
  623. depends on !AEABI
  624. help
  625. Say Y here to include the kernel code necessary if you want to run
  626. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  627. experimental; if this sounds frightening, say N and sleep in peace.
  628. You can also say M here to compile this support as a module (which
  629. will be called arthur).
  630. endmenu
  631. menu "Power management options"
  632. source "kernel/power/Kconfig"
  633. config APM
  634. tristate "Advanced Power Management Emulation"
  635. ---help---
  636. APM is a BIOS specification for saving power using several different
  637. techniques. This is mostly useful for battery powered laptops with
  638. APM compliant BIOSes. If you say Y here, the system time will be
  639. reset after a RESUME operation, the /proc/apm device will provide
  640. battery status information, and user-space programs will receive
  641. notification of APM "events" (e.g. battery status change).
  642. In order to use APM, you will need supporting software. For location
  643. and more information, read <file:Documentation/pm.txt> and the
  644. Battery Powered Linux mini-HOWTO, available from
  645. <http://www.tldp.org/docs.html#howto>.
  646. This driver does not spin down disk drives (see the hdparm(8)
  647. manpage ("man 8 hdparm") for that), and it doesn't turn off
  648. VESA-compliant "green" monitors.
  649. Generally, if you don't have a battery in your machine, there isn't
  650. much point in using this driver and you should say N. If you get
  651. random kernel OOPSes or reboots that don't seem to be related to
  652. anything, try disabling/enabling this option (or disabling/enabling
  653. APM in your BIOS).
  654. endmenu
  655. source "net/Kconfig"
  656. menu "Device Drivers"
  657. source "drivers/base/Kconfig"
  658. source "drivers/connector/Kconfig"
  659. if ALIGNMENT_TRAP
  660. source "drivers/mtd/Kconfig"
  661. endif
  662. source "drivers/parport/Kconfig"
  663. source "drivers/pnp/Kconfig"
  664. source "drivers/block/Kconfig"
  665. source "drivers/acorn/block/Kconfig"
  666. if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
  667. || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
  668. || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
  669. || ARCH_IXP23XX
  670. source "drivers/ide/Kconfig"
  671. endif
  672. source "drivers/scsi/Kconfig"
  673. source "drivers/md/Kconfig"
  674. source "drivers/message/fusion/Kconfig"
  675. source "drivers/ieee1394/Kconfig"
  676. source "drivers/message/i2o/Kconfig"
  677. source "drivers/net/Kconfig"
  678. source "drivers/isdn/Kconfig"
  679. # input before char - char/joystick depends on it. As does USB.
  680. source "drivers/input/Kconfig"
  681. source "drivers/char/Kconfig"
  682. source "drivers/i2c/Kconfig"
  683. source "drivers/spi/Kconfig"
  684. source "drivers/w1/Kconfig"
  685. source "drivers/hwmon/Kconfig"
  686. #source "drivers/l3/Kconfig"
  687. source "drivers/misc/Kconfig"
  688. source "drivers/mfd/Kconfig"
  689. source "drivers/leds/Kconfig"
  690. source "drivers/media/Kconfig"
  691. source "drivers/video/Kconfig"
  692. source "sound/Kconfig"
  693. source "drivers/usb/Kconfig"
  694. source "drivers/mmc/Kconfig"
  695. source "drivers/rtc/Kconfig"
  696. endmenu
  697. source "fs/Kconfig"
  698. source "arch/arm/oprofile/Kconfig"
  699. source "arch/arm/Kconfig.debug"
  700. source "security/Kconfig"
  701. source "crypto/Kconfig"
  702. source "lib/Kconfig"