Kconfig 27 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. select SYS_SUPPORTS_APM_EMULATION
  11. help
  12. The ARM series is a line of low-power-consumption RISC chip designs
  13. licensed by ARM Ltd and targeted at embedded applications and
  14. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  15. manufactured, but legacy ARM-based PC hardware remains popular in
  16. Europe. There is an ARM Linux project with a web page at
  17. <http://www.arm.linux.org.uk/>.
  18. config SYS_SUPPORTS_APM_EMULATION
  19. bool
  20. config GENERIC_GPIO
  21. bool
  22. default n
  23. config GENERIC_TIME
  24. bool
  25. default n
  26. config GENERIC_CLOCKEVENTS
  27. bool
  28. default n
  29. config MMU
  30. bool
  31. default y
  32. config NO_IOPORT
  33. bool
  34. default n
  35. config EISA
  36. bool
  37. ---help---
  38. The Extended Industry Standard Architecture (EISA) bus was
  39. developed as an open alternative to the IBM MicroChannel bus.
  40. The EISA bus provided some of the features of the IBM MicroChannel
  41. bus while maintaining backward compatibility with cards made for
  42. the older ISA bus. The EISA bus saw limited use between 1988 and
  43. 1995 when it was made obsolete by the PCI bus.
  44. Say Y here if you are building a kernel for an EISA-based machine.
  45. Otherwise, say N.
  46. config SBUS
  47. bool
  48. config MCA
  49. bool
  50. help
  51. MicroChannel Architecture is found in some IBM PS/2 machines and
  52. laptops. It is a bus system similar to PCI or ISA. See
  53. <file:Documentation/mca.txt> (and especially the web page given
  54. there) before attempting to build an MCA bus kernel.
  55. config GENERIC_HARDIRQS
  56. bool
  57. default y
  58. config STACKTRACE_SUPPORT
  59. bool
  60. default y
  61. config LOCKDEP_SUPPORT
  62. bool
  63. default y
  64. config TRACE_IRQFLAGS_SUPPORT
  65. bool
  66. default y
  67. config HARDIRQS_SW_RESEND
  68. bool
  69. default y
  70. config GENERIC_IRQ_PROBE
  71. bool
  72. default y
  73. config RWSEM_GENERIC_SPINLOCK
  74. bool
  75. default y
  76. config RWSEM_XCHGADD_ALGORITHM
  77. bool
  78. config ARCH_HAS_ILOG2_U32
  79. bool
  80. default n
  81. config ARCH_HAS_ILOG2_U64
  82. bool
  83. default n
  84. config GENERIC_HWEIGHT
  85. bool
  86. default y
  87. config GENERIC_CALIBRATE_DELAY
  88. bool
  89. default y
  90. config ARCH_MAY_HAVE_PC_FDC
  91. bool
  92. config ZONE_DMA
  93. bool
  94. default y
  95. config GENERIC_ISA_DMA
  96. bool
  97. config FIQ
  98. bool
  99. config ARCH_MTD_XIP
  100. bool
  101. config VECTORS_BASE
  102. hex
  103. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  104. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  105. default 0x00000000
  106. help
  107. The base address of exception vectors.
  108. source "init/Kconfig"
  109. menu "System Type"
  110. choice
  111. prompt "ARM system type"
  112. default ARCH_VERSATILE
  113. config ARCH_AAEC2000
  114. bool "Agilent AAEC-2000 based"
  115. select ARM_AMBA
  116. help
  117. This enables support for systems based on the Agilent AAEC-2000
  118. config ARCH_INTEGRATOR
  119. bool "ARM Ltd. Integrator family"
  120. select ARM_AMBA
  121. select ICST525
  122. help
  123. Support for ARM's Integrator platform.
  124. config ARCH_REALVIEW
  125. bool "ARM Ltd. RealView family"
  126. select ARM_AMBA
  127. select ICST307
  128. help
  129. This enables support for ARM Ltd RealView boards.
  130. config ARCH_VERSATILE
  131. bool "ARM Ltd. Versatile family"
  132. select ARM_AMBA
  133. select ARM_VIC
  134. select ICST307
  135. select GENERIC_TIME
  136. select GENERIC_CLOCKEVENTS
  137. help
  138. This enables support for ARM Ltd Versatile board.
  139. config ARCH_AT91
  140. bool "Atmel AT91"
  141. select GENERIC_GPIO
  142. help
  143. This enables support for systems based on the Atmel AT91RM9200
  144. and AT91SAM9xxx processors.
  145. config ARCH_CLPS7500
  146. bool "Cirrus CL-PS7500FE"
  147. select TIMER_ACORN
  148. select ISA
  149. select NO_IOPORT
  150. help
  151. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  152. config ARCH_CLPS711X
  153. bool "Cirrus Logic CLPS711x/EP721x-based"
  154. help
  155. Support for Cirrus Logic 711x/721x based boards.
  156. config ARCH_CO285
  157. bool "Co-EBSA285"
  158. select FOOTBRIDGE
  159. select FOOTBRIDGE_ADDIN
  160. help
  161. Support for Intel's EBSA285 companion chip.
  162. config ARCH_EBSA110
  163. bool "EBSA-110"
  164. select ISA
  165. select NO_IOPORT
  166. help
  167. This is an evaluation board for the StrongARM processor available
  168. from Digital. It has limited hardware on-board, including an
  169. Ethernet interface, two PCMCIA sockets, two serial ports and a
  170. parallel port.
  171. config ARCH_EP93XX
  172. bool "EP93xx-based"
  173. select ARM_AMBA
  174. select ARM_VIC
  175. help
  176. This enables support for the Cirrus EP93xx series of CPUs.
  177. config ARCH_FOOTBRIDGE
  178. bool "FootBridge"
  179. select FOOTBRIDGE
  180. help
  181. Support for systems based on the DC21285 companion chip
  182. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  183. config ARCH_NETX
  184. bool "Hilscher NetX based"
  185. select ARM_VIC
  186. help
  187. This enables support for systems based on the Hilscher NetX Soc
  188. config ARCH_H720X
  189. bool "Hynix HMS720x-based"
  190. select ISA_DMA_API
  191. help
  192. This enables support for systems based on the Hynix HMS720x
  193. config ARCH_IMX
  194. bool "IMX"
  195. select GENERIC_GPIO
  196. help
  197. Support for Motorola's i.MX family of processors (MX1, MXL).
  198. config ARCH_IOP13XX
  199. bool "IOP13xx-based"
  200. depends on MMU
  201. select PLAT_IOP
  202. select PCI
  203. select ARCH_SUPPORTS_MSI
  204. help
  205. Support for Intel's IOP13XX (XScale) family of processors.
  206. config ARCH_IOP32X
  207. bool "IOP32x-based"
  208. depends on MMU
  209. select PLAT_IOP
  210. select PCI
  211. help
  212. Support for Intel's 80219 and IOP32X (XScale) family of
  213. processors.
  214. config ARCH_IOP33X
  215. bool "IOP33x-based"
  216. depends on MMU
  217. select PLAT_IOP
  218. select PCI
  219. help
  220. Support for Intel's IOP33X (XScale) family of processors.
  221. config ARCH_IXP23XX
  222. bool "IXP23XX-based"
  223. depends on MMU
  224. select PCI
  225. help
  226. Support for Intel's IXP23xx (XScale) family of processors.
  227. config ARCH_IXP2000
  228. bool "IXP2400/2800-based"
  229. depends on MMU
  230. select PCI
  231. help
  232. Support for Intel's IXP2400/2800 (XScale) family of processors.
  233. config ARCH_IXP4XX
  234. bool "IXP4xx-based"
  235. depends on MMU
  236. select GENERIC_GPIO
  237. select GENERIC_TIME
  238. select GENERIC_CLOCKEVENTS
  239. help
  240. Support for Intel's IXP4XX (XScale) family of processors.
  241. config ARCH_L7200
  242. bool "LinkUp-L7200"
  243. select FIQ
  244. help
  245. Say Y here if you intend to run this kernel on a LinkUp Systems
  246. L7200 Software Development Board which uses an ARM720T processor.
  247. Information on this board can be obtained at:
  248. <http://www.linkupsys.com/>
  249. If you have any questions or comments about the Linux kernel port
  250. to this board, send e-mail to <sjhill@cotw.com>.
  251. config ARCH_KS8695
  252. bool "Micrel/Kendin KS8695"
  253. help
  254. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  255. System-on-Chip devices.
  256. config ARCH_NS9XXX
  257. bool "NetSilicon NS9xxx"
  258. help
  259. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  260. System.
  261. <http://www.digi.com/products/microprocessors/index.jsp>
  262. config ARCH_PNX4008
  263. bool "Philips Nexperia PNX4008 Mobile"
  264. help
  265. This enables support for Philips PNX4008 mobile platform.
  266. config ARCH_PXA
  267. bool "PXA2xx-based"
  268. depends on MMU
  269. select ARCH_MTD_XIP
  270. select GENERIC_GPIO
  271. select GENERIC_TIME
  272. help
  273. Support for Intel's PXA2XX processor line.
  274. config ARCH_RPC
  275. bool "RiscPC"
  276. select ARCH_ACORN
  277. select FIQ
  278. select TIMER_ACORN
  279. select ARCH_MAY_HAVE_PC_FDC
  280. select ISA_DMA_API
  281. select NO_IOPORT
  282. help
  283. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  284. CD-ROM interface, serial and parallel port, and the floppy drive.
  285. config ARCH_SA1100
  286. bool "SA1100-based"
  287. select ISA
  288. select ARCH_DISCONTIGMEM_ENABLE
  289. select ARCH_MTD_XIP
  290. select GENERIC_GPIO
  291. help
  292. Support for StrongARM 11x0 based boards.
  293. config ARCH_S3C2410
  294. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  295. select GENERIC_GPIO
  296. help
  297. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  298. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  299. the Samsung SMDK2410 development board (and derivatives).
  300. config ARCH_SHARK
  301. bool "Shark"
  302. select ISA
  303. select ISA_DMA
  304. select PCI
  305. help
  306. Support for the StrongARM based Digital DNARD machine, also known
  307. as "Shark" (<http://www.shark-linux.de/shark.html>).
  308. config ARCH_LH7A40X
  309. bool "Sharp LH7A40X"
  310. help
  311. Say Y here for systems based on one of the Sharp LH7A40X
  312. System on a Chip processors. These CPUs include an ARM922T
  313. core with a wide array of integrated devices for
  314. hand-held and low-power applications.
  315. config ARCH_DAVINCI
  316. bool "TI DaVinci"
  317. select GENERIC_TIME
  318. select GENERIC_CLOCKEVENTS
  319. help
  320. Support for TI's DaVinci platform.
  321. config ARCH_OMAP
  322. bool "TI OMAP"
  323. select GENERIC_GPIO
  324. select GENERIC_TIME
  325. help
  326. Support for TI's OMAP platform (OMAP1 and OMAP2).
  327. endchoice
  328. source "arch/arm/mach-clps711x/Kconfig"
  329. source "arch/arm/mach-ep93xx/Kconfig"
  330. source "arch/arm/mach-footbridge/Kconfig"
  331. source "arch/arm/mach-integrator/Kconfig"
  332. source "arch/arm/mach-iop32x/Kconfig"
  333. source "arch/arm/mach-iop33x/Kconfig"
  334. source "arch/arm/mach-iop13xx/Kconfig"
  335. source "arch/arm/mach-ixp4xx/Kconfig"
  336. source "arch/arm/mach-ixp2000/Kconfig"
  337. source "arch/arm/mach-ixp23xx/Kconfig"
  338. source "arch/arm/mach-pxa/Kconfig"
  339. source "arch/arm/mach-sa1100/Kconfig"
  340. source "arch/arm/plat-omap/Kconfig"
  341. source "arch/arm/mach-omap1/Kconfig"
  342. source "arch/arm/mach-omap2/Kconfig"
  343. source "arch/arm/plat-s3c24xx/Kconfig"
  344. if ARCH_S3C2410
  345. source "arch/arm/mach-s3c2400/Kconfig"
  346. source "arch/arm/mach-s3c2410/Kconfig"
  347. source "arch/arm/mach-s3c2412/Kconfig"
  348. source "arch/arm/mach-s3c2440/Kconfig"
  349. source "arch/arm/mach-s3c2442/Kconfig"
  350. source "arch/arm/mach-s3c2443/Kconfig"
  351. endif
  352. source "arch/arm/mach-lh7a40x/Kconfig"
  353. source "arch/arm/mach-imx/Kconfig"
  354. source "arch/arm/mach-h720x/Kconfig"
  355. source "arch/arm/mach-versatile/Kconfig"
  356. source "arch/arm/mach-aaec2000/Kconfig"
  357. source "arch/arm/mach-realview/Kconfig"
  358. source "arch/arm/mach-at91/Kconfig"
  359. source "arch/arm/mach-netx/Kconfig"
  360. source "arch/arm/mach-ns9xxx/Kconfig"
  361. source "arch/arm/mach-davinci/Kconfig"
  362. source "arch/arm/mach-ks8695/Kconfig"
  363. # Definitions to make life easier
  364. config ARCH_ACORN
  365. bool
  366. config PLAT_IOP
  367. bool
  368. source arch/arm/mm/Kconfig
  369. config IWMMXT
  370. bool "Enable iWMMXt support"
  371. depends on CPU_XSCALE || CPU_XSC3
  372. default y if PXA27x
  373. help
  374. Enable support for iWMMXt context switching at run time if
  375. running on a CPU that supports it.
  376. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  377. config XSCALE_PMU
  378. bool
  379. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  380. default y
  381. if !MMU
  382. source "arch/arm/Kconfig-nommu"
  383. endif
  384. endmenu
  385. source "arch/arm/common/Kconfig"
  386. config FORCE_MAX_ZONEORDER
  387. int
  388. depends on SA1111
  389. default "9"
  390. menu "Bus support"
  391. config ARM_AMBA
  392. bool
  393. config ISA
  394. bool
  395. help
  396. Find out whether you have ISA slots on your motherboard. ISA is the
  397. name of a bus system, i.e. the way the CPU talks to the other stuff
  398. inside your box. Other bus systems are PCI, EISA, MicroChannel
  399. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  400. newer boards don't support it. If you have ISA, say Y, otherwise N.
  401. # Select ISA DMA controller support
  402. config ISA_DMA
  403. bool
  404. select ISA_DMA_API
  405. # Select ISA DMA interface
  406. config ISA_DMA_API
  407. bool
  408. config PCI
  409. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695
  410. help
  411. Find out whether you have a PCI motherboard. PCI is the name of a
  412. bus system, i.e. the way the CPU talks to the other stuff inside
  413. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  414. VESA. If you have PCI, say Y, otherwise N.
  415. The PCI-HOWTO, available from
  416. <http://www.tldp.org/docs.html#howto>, contains valuable
  417. information about which PCI hardware does work under Linux and which
  418. doesn't.
  419. # Select the host bridge type
  420. config PCI_HOST_VIA82C505
  421. bool
  422. depends on PCI && ARCH_SHARK
  423. default y
  424. source "drivers/pci/Kconfig"
  425. source "drivers/pcmcia/Kconfig"
  426. endmenu
  427. menu "Kernel Features"
  428. source "kernel/time/Kconfig"
  429. config SMP
  430. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  431. depends on EXPERIMENTAL && REALVIEW_MPCORE
  432. help
  433. This enables support for systems with more than one CPU. If you have
  434. a system with only one CPU, like most personal computers, say N. If
  435. you have a system with more than one CPU, say Y.
  436. If you say N here, the kernel will run on single and multiprocessor
  437. machines, but will use only one CPU of a multiprocessor machine. If
  438. you say Y here, the kernel will run on many, but not all, single
  439. processor machines. On a single processor machine, the kernel will
  440. run faster if you say N here.
  441. See also the <file:Documentation/smp.txt>,
  442. <file:Documentation/i386/IO-APIC.txt>,
  443. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  444. <http://www.linuxdoc.org/docs.html#howto>.
  445. If you don't know what to do here, say N.
  446. config NR_CPUS
  447. int "Maximum number of CPUs (2-32)"
  448. range 2 32
  449. depends on SMP
  450. default "4"
  451. config HOTPLUG_CPU
  452. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  453. depends on SMP && HOTPLUG && EXPERIMENTAL
  454. help
  455. Say Y here to experiment with turning CPUs off and on. CPUs
  456. can be controlled through /sys/devices/system/cpu.
  457. config LOCAL_TIMERS
  458. bool "Use local timer interrupts"
  459. depends on SMP && REALVIEW_MPCORE
  460. default y
  461. help
  462. Enable support for local timers on SMP platforms, rather then the
  463. legacy IPI broadcast method. Local timers allows the system
  464. accounting to be spread across the timer interval, preventing a
  465. "thundering herd" at every timer tick.
  466. config PREEMPT
  467. bool "Preemptible Kernel (EXPERIMENTAL)"
  468. depends on EXPERIMENTAL
  469. help
  470. This option reduces the latency of the kernel when reacting to
  471. real-time or interactive events by allowing a low priority process to
  472. be preempted even if it is in kernel mode executing a system call.
  473. This allows applications to run more reliably even when the system is
  474. under load.
  475. Say Y here if you are building a kernel for a desktop, embedded
  476. or real-time system. Say N if you are unsure.
  477. config NO_IDLE_HZ
  478. bool "Dynamic tick timer"
  479. depends on !GENERIC_CLOCKEVENTS
  480. help
  481. Select this option if you want to disable continuous timer ticks
  482. and have them programmed to occur as required. This option saves
  483. power as the system can remain in idle state for longer.
  484. By default dynamic tick is disabled during the boot, and can be
  485. manually enabled with:
  486. echo 1 > /sys/devices/system/timer/timer0/dyn_tick
  487. Alternatively, if you want dynamic tick automatically enabled
  488. during boot, pass "dyntick=enable" via the kernel command string.
  489. Please note that dynamic tick may affect the accuracy of
  490. timekeeping on some platforms depending on the implementation.
  491. Currently at least OMAP, PXA2xx and SA11x0 platforms are known
  492. to have accurate timekeeping with dynamic tick.
  493. config HZ
  494. int
  495. default 128 if ARCH_L7200
  496. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  497. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  498. default 100
  499. config AEABI
  500. bool "Use the ARM EABI to compile the kernel"
  501. help
  502. This option allows for the kernel to be compiled using the latest
  503. ARM ABI (aka EABI). This is only useful if you are using a user
  504. space environment that is also compiled with EABI.
  505. Since there are major incompatibilities between the legacy ABI and
  506. EABI, especially with regard to structure member alignment, this
  507. option also changes the kernel syscall calling convention to
  508. disambiguate both ABIs and allow for backward compatibility support
  509. (selected with CONFIG_OABI_COMPAT).
  510. To use this you need GCC version 4.0.0 or later.
  511. config OABI_COMPAT
  512. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  513. depends on AEABI && EXPERIMENTAL
  514. default y
  515. help
  516. This option preserves the old syscall interface along with the
  517. new (ARM EABI) one. It also provides a compatibility layer to
  518. intercept syscalls that have structure arguments which layout
  519. in memory differs between the legacy ABI and the new ARM EABI
  520. (only for non "thumb" binaries). This option adds a tiny
  521. overhead to all syscalls and produces a slightly larger kernel.
  522. If you know you'll be using only pure EABI user space then you
  523. can say N here. If this option is not selected and you attempt
  524. to execute a legacy ABI binary then the result will be
  525. UNPREDICTABLE (in fact it can be predicted that it won't work
  526. at all). If in doubt say Y.
  527. config ARCH_DISCONTIGMEM_ENABLE
  528. bool
  529. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  530. help
  531. Say Y to support efficient handling of discontiguous physical memory,
  532. for architectures which are either NUMA (Non-Uniform Memory Access)
  533. or have huge holes in the physical address space for other reasons.
  534. See <file:Documentation/vm/numa> for more.
  535. config NODES_SHIFT
  536. int
  537. default "4" if ARCH_LH7A40X
  538. default "2"
  539. depends on NEED_MULTIPLE_NODES
  540. source "mm/Kconfig"
  541. config LEDS
  542. bool "Timer and CPU usage LEDs"
  543. depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
  544. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  545. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  546. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  547. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  548. ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
  549. ARCH_KS8695
  550. help
  551. If you say Y here, the LEDs on your machine will be used
  552. to provide useful information about your current system status.
  553. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  554. be able to select which LEDs are active using the options below. If
  555. you are compiling a kernel for the EBSA-110 or the LART however, the
  556. red LED will simply flash regularly to indicate that the system is
  557. still functional. It is safe to say Y here if you have a CATS
  558. system, but the driver will do nothing.
  559. config LEDS_TIMER
  560. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  561. MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  562. depends on LEDS
  563. depends on !GENERIC_CLOCKEVENTS
  564. default y if ARCH_EBSA110
  565. help
  566. If you say Y here, one of the system LEDs (the green one on the
  567. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  568. will flash regularly to indicate that the system is still
  569. operational. This is mainly useful to kernel hackers who are
  570. debugging unstable kernels.
  571. The LART uses the same LED for both Timer LED and CPU usage LED
  572. functions. You may choose to use both, but the Timer LED function
  573. will overrule the CPU usage LED.
  574. config LEDS_CPU
  575. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  576. !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  577. depends on LEDS
  578. help
  579. If you say Y here, the red LED will be used to give a good real
  580. time indication of CPU usage, by lighting whenever the idle task
  581. is not currently executing.
  582. The LART uses the same LED for both Timer LED and CPU usage LED
  583. functions. You may choose to use both, but the Timer LED function
  584. will overrule the CPU usage LED.
  585. config ALIGNMENT_TRAP
  586. bool
  587. depends on CPU_CP15_MMU
  588. default y if !ARCH_EBSA110
  589. help
  590. ARM processors cannot fetch/store information which is not
  591. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  592. address divisible by 4. On 32-bit ARM processors, these non-aligned
  593. fetch/store instructions will be emulated in software if you say
  594. here, which has a severe performance impact. This is necessary for
  595. correct operation of some network protocols. With an IP-only
  596. configuration it is safe to say N, otherwise say Y.
  597. endmenu
  598. menu "Boot options"
  599. # Compressed boot loader in ROM. Yes, we really want to ask about
  600. # TEXT and BSS so we preserve their values in the config files.
  601. config ZBOOT_ROM_TEXT
  602. hex "Compressed ROM boot loader base address"
  603. default "0"
  604. help
  605. The physical address at which the ROM-able zImage is to be
  606. placed in the target. Platforms which normally make use of
  607. ROM-able zImage formats normally set this to a suitable
  608. value in their defconfig file.
  609. If ZBOOT_ROM is not enabled, this has no effect.
  610. config ZBOOT_ROM_BSS
  611. hex "Compressed ROM boot loader BSS address"
  612. default "0"
  613. help
  614. The base address of an area of read/write memory in the target
  615. for the ROM-able zImage which must be available while the
  616. decompressor is running. It must be large enough to hold the
  617. entire decompressed kernel plus an additional 128 KiB.
  618. Platforms which normally make use of ROM-able zImage formats
  619. normally set this to a suitable value in their defconfig file.
  620. If ZBOOT_ROM is not enabled, this has no effect.
  621. config ZBOOT_ROM
  622. bool "Compressed boot loader in ROM/flash"
  623. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  624. help
  625. Say Y here if you intend to execute your compressed kernel image
  626. (zImage) directly from ROM or flash. If unsure, say N.
  627. config CMDLINE
  628. string "Default kernel command string"
  629. default ""
  630. help
  631. On some architectures (EBSA110 and CATS), there is currently no way
  632. for the boot loader to pass arguments to the kernel. For these
  633. architectures, you should supply some command-line options at build
  634. time by entering them here. As a minimum, you should specify the
  635. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  636. config XIP_KERNEL
  637. bool "Kernel Execute-In-Place from ROM"
  638. depends on !ZBOOT_ROM
  639. help
  640. Execute-In-Place allows the kernel to run from non-volatile storage
  641. directly addressable by the CPU, such as NOR flash. This saves RAM
  642. space since the text section of the kernel is not loaded from flash
  643. to RAM. Read-write sections, such as the data section and stack,
  644. are still copied to RAM. The XIP kernel is not compressed since
  645. it has to run directly from flash, so it will take more space to
  646. store it. The flash address used to link the kernel object files,
  647. and for storing it, is configuration dependent. Therefore, if you
  648. say Y here, you must know the proper physical address where to
  649. store the kernel image depending on your own flash memory usage.
  650. Also note that the make target becomes "make xipImage" rather than
  651. "make zImage" or "make Image". The final kernel binary to put in
  652. ROM memory will be arch/arm/boot/xipImage.
  653. If unsure, say N.
  654. config XIP_PHYS_ADDR
  655. hex "XIP Kernel Physical Location"
  656. depends on XIP_KERNEL
  657. default "0x00080000"
  658. help
  659. This is the physical address in your flash memory the kernel will
  660. be linked for and stored to. This address is dependent on your
  661. own flash usage.
  662. config KEXEC
  663. bool "Kexec system call (EXPERIMENTAL)"
  664. depends on EXPERIMENTAL
  665. help
  666. kexec is a system call that implements the ability to shutdown your
  667. current kernel, and to start another kernel. It is like a reboot
  668. but it is indepedent of the system firmware. And like a reboot
  669. you can start any kernel with it, not just Linux.
  670. It is an ongoing process to be certain the hardware in a machine
  671. is properly shutdown, so do not be surprised if this code does not
  672. initially work for you. It may help to enable device hotplugging
  673. support.
  674. endmenu
  675. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
  676. menu "CPU Frequency scaling"
  677. source "drivers/cpufreq/Kconfig"
  678. config CPU_FREQ_SA1100
  679. bool
  680. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  681. default y
  682. config CPU_FREQ_SA1110
  683. bool
  684. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  685. default y
  686. config CPU_FREQ_INTEGRATOR
  687. tristate "CPUfreq driver for ARM Integrator CPUs"
  688. depends on ARCH_INTEGRATOR && CPU_FREQ
  689. default y
  690. help
  691. This enables the CPUfreq driver for ARM Integrator CPUs.
  692. For details, take a look at <file:Documentation/cpu-freq>.
  693. If in doubt, say Y.
  694. config CPU_FREQ_IMX
  695. tristate "CPUfreq driver for i.MX CPUs"
  696. depends on ARCH_IMX && CPU_FREQ
  697. default n
  698. help
  699. This enables the CPUfreq driver for i.MX CPUs.
  700. If in doubt, say N.
  701. endmenu
  702. endif
  703. menu "Floating point emulation"
  704. comment "At least one emulation must be selected"
  705. config FPE_NWFPE
  706. bool "NWFPE math emulation"
  707. depends on !AEABI || OABI_COMPAT
  708. ---help---
  709. Say Y to include the NWFPE floating point emulator in the kernel.
  710. This is necessary to run most binaries. Linux does not currently
  711. support floating point hardware so you need to say Y here even if
  712. your machine has an FPA or floating point co-processor podule.
  713. You may say N here if you are going to load the Acorn FPEmulator
  714. early in the bootup.
  715. config FPE_NWFPE_XP
  716. bool "Support extended precision"
  717. depends on FPE_NWFPE
  718. help
  719. Say Y to include 80-bit support in the kernel floating-point
  720. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  721. Note that gcc does not generate 80-bit operations by default,
  722. so in most cases this option only enlarges the size of the
  723. floating point emulator without any good reason.
  724. You almost surely want to say N here.
  725. config FPE_FASTFPE
  726. bool "FastFPE math emulation (EXPERIMENTAL)"
  727. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  728. ---help---
  729. Say Y here to include the FAST floating point emulator in the kernel.
  730. This is an experimental much faster emulator which now also has full
  731. precision for the mantissa. It does not support any exceptions.
  732. It is very simple, and approximately 3-6 times faster than NWFPE.
  733. It should be sufficient for most programs. It may be not suitable
  734. for scientific calculations, but you have to check this for yourself.
  735. If you do not feel you need a faster FP emulation you should better
  736. choose NWFPE.
  737. config VFP
  738. bool "VFP-format floating point maths"
  739. depends on CPU_V6 || CPU_ARM926T
  740. help
  741. Say Y to include VFP support code in the kernel. This is needed
  742. if your hardware includes a VFP unit.
  743. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  744. release notes and additional status information.
  745. Say N if your target does not have VFP hardware.
  746. endmenu
  747. menu "Userspace binary formats"
  748. source "fs/Kconfig.binfmt"
  749. config ARTHUR
  750. tristate "RISC OS personality"
  751. depends on !AEABI
  752. help
  753. Say Y here to include the kernel code necessary if you want to run
  754. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  755. experimental; if this sounds frightening, say N and sleep in peace.
  756. You can also say M here to compile this support as a module (which
  757. will be called arthur).
  758. endmenu
  759. menu "Power management options"
  760. source "kernel/power/Kconfig"
  761. endmenu
  762. source "net/Kconfig"
  763. menu "Device Drivers"
  764. source "drivers/base/Kconfig"
  765. source "drivers/connector/Kconfig"
  766. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  767. source "drivers/mtd/Kconfig"
  768. endif
  769. source "drivers/parport/Kconfig"
  770. source "drivers/pnp/Kconfig"
  771. source "drivers/block/Kconfig"
  772. source "drivers/acorn/block/Kconfig"
  773. if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
  774. || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
  775. || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
  776. || ARCH_IXP23XX
  777. source "drivers/ide/Kconfig"
  778. endif
  779. source "drivers/scsi/Kconfig"
  780. source "drivers/ata/Kconfig"
  781. source "drivers/md/Kconfig"
  782. source "drivers/message/fusion/Kconfig"
  783. source "drivers/ieee1394/Kconfig"
  784. source "drivers/message/i2o/Kconfig"
  785. source "drivers/net/Kconfig"
  786. source "drivers/isdn/Kconfig"
  787. # input before char - char/joystick depends on it. As does USB.
  788. source "drivers/input/Kconfig"
  789. source "drivers/char/Kconfig"
  790. source "drivers/i2c/Kconfig"
  791. source "drivers/spi/Kconfig"
  792. source "drivers/w1/Kconfig"
  793. source "drivers/hwmon/Kconfig"
  794. #source "drivers/l3/Kconfig"
  795. source "drivers/misc/Kconfig"
  796. source "drivers/mfd/Kconfig"
  797. source "drivers/leds/Kconfig"
  798. source "drivers/media/Kconfig"
  799. source "drivers/video/Kconfig"
  800. source "sound/Kconfig"
  801. source "drivers/hid/Kconfig"
  802. source "drivers/usb/Kconfig"
  803. source "drivers/mmc/Kconfig"
  804. source "drivers/rtc/Kconfig"
  805. endmenu
  806. source "fs/Kconfig"
  807. source "arch/arm/oprofile/Kconfig"
  808. source "arch/arm/Kconfig.debug"
  809. source "security/Kconfig"
  810. source "crypto/Kconfig"
  811. source "lib/Kconfig"