Kconfig 26 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 GENERIC_TIME
  18. bool
  19. default n
  20. config MMU
  21. bool
  22. default y
  23. config EISA
  24. bool
  25. ---help---
  26. The Extended Industry Standard Architecture (EISA) bus was
  27. developed as an open alternative to the IBM MicroChannel bus.
  28. The EISA bus provided some of the features of the IBM MicroChannel
  29. bus while maintaining backward compatibility with cards made for
  30. the older ISA bus. The EISA bus saw limited use between 1988 and
  31. 1995 when it was made obsolete by the PCI bus.
  32. Say Y here if you are building a kernel for an EISA-based machine.
  33. Otherwise, say N.
  34. config SBUS
  35. bool
  36. config MCA
  37. bool
  38. help
  39. MicroChannel Architecture is found in some IBM PS/2 machines and
  40. laptops. It is a bus system similar to PCI or ISA. See
  41. <file:Documentation/mca.txt> (and especially the web page given
  42. there) before attempting to build an MCA bus kernel.
  43. config GENERIC_HARDIRQS
  44. bool
  45. default y
  46. config TRACE_IRQFLAGS_SUPPORT
  47. bool
  48. default y
  49. config HARDIRQS_SW_RESEND
  50. bool
  51. default y
  52. config GENERIC_IRQ_PROBE
  53. bool
  54. default y
  55. config RWSEM_GENERIC_SPINLOCK
  56. bool
  57. default y
  58. config RWSEM_XCHGADD_ALGORITHM
  59. bool
  60. config ARCH_HAS_ILOG2_U32
  61. bool
  62. default n
  63. config ARCH_HAS_ILOG2_U64
  64. bool
  65. default n
  66. config GENERIC_HWEIGHT
  67. bool
  68. default y
  69. config GENERIC_CALIBRATE_DELAY
  70. bool
  71. default y
  72. config GENERIC_BUST_SPINLOCK
  73. bool
  74. config ARCH_MAY_HAVE_PC_FDC
  75. bool
  76. config GENERIC_ISA_DMA
  77. bool
  78. config FIQ
  79. bool
  80. config ARCH_MTD_XIP
  81. bool
  82. config VECTORS_BASE
  83. hex
  84. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  85. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  86. default 0x00000000
  87. help
  88. The base address of exception vectors.
  89. source "init/Kconfig"
  90. menu "System Type"
  91. choice
  92. prompt "ARM system type"
  93. default ARCH_VERSATILE
  94. config ARCH_AAEC2000
  95. bool "Agilent AAEC-2000 based"
  96. select ARM_AMBA
  97. help
  98. This enables support for systems based on the Agilent AAEC-2000
  99. config ARCH_INTEGRATOR
  100. bool "ARM Ltd. Integrator family"
  101. select ARM_AMBA
  102. select ICST525
  103. help
  104. Support for ARM's Integrator platform.
  105. config ARCH_REALVIEW
  106. bool "ARM Ltd. RealView family"
  107. select ARM_AMBA
  108. select ICST307
  109. help
  110. This enables support for ARM Ltd RealView boards.
  111. config ARCH_VERSATILE
  112. bool "ARM Ltd. Versatile family"
  113. select ARM_AMBA
  114. select ARM_VIC
  115. select ICST307
  116. help
  117. This enables support for ARM Ltd Versatile board.
  118. config ARCH_AT91
  119. bool "Atmel AT91"
  120. help
  121. This enables support for systems based on the Atmel AT91RM9200
  122. and AT91SAM9xxx processors.
  123. config ARCH_CLPS7500
  124. bool "Cirrus CL-PS7500FE"
  125. select TIMER_ACORN
  126. select ISA
  127. help
  128. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  129. config ARCH_CLPS711X
  130. bool "Cirrus Logic CLPS711x/EP721x-based"
  131. help
  132. Support for Cirrus Logic 711x/721x based boards.
  133. config ARCH_CO285
  134. bool "Co-EBSA285"
  135. select FOOTBRIDGE
  136. select FOOTBRIDGE_ADDIN
  137. help
  138. Support for Intel's EBSA285 companion chip.
  139. config ARCH_EBSA110
  140. bool "EBSA-110"
  141. select ISA
  142. help
  143. This is an evaluation board for the StrongARM processor available
  144. from Digital. It has limited hardware on-board, including an
  145. Ethernet interface, two PCMCIA sockets, two serial ports and a
  146. parallel port.
  147. config ARCH_EP93XX
  148. bool "EP93xx-based"
  149. select ARM_AMBA
  150. select ARM_VIC
  151. help
  152. This enables support for the Cirrus EP93xx series of CPUs.
  153. config ARCH_FOOTBRIDGE
  154. bool "FootBridge"
  155. select FOOTBRIDGE
  156. help
  157. Support for systems based on the DC21285 companion chip
  158. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  159. config ARCH_NETX
  160. bool "Hilscher NetX based"
  161. select ARM_VIC
  162. help
  163. This enables support for systems based on the Hilscher NetX Soc
  164. config ARCH_H720X
  165. bool "Hynix HMS720x-based"
  166. select ISA_DMA_API
  167. help
  168. This enables support for systems based on the Hynix HMS720x
  169. config ARCH_IMX
  170. bool "IMX"
  171. help
  172. Support for Motorola's i.MX family of processors (MX1, MXL).
  173. config ARCH_IOP32X
  174. bool "IOP32x-based"
  175. depends on MMU
  176. select PLAT_IOP
  177. select PCI
  178. help
  179. Support for Intel's 80219 and IOP32X (XScale) family of
  180. processors.
  181. config ARCH_IOP33X
  182. bool "IOP33x-based"
  183. depends on MMU
  184. select PLAT_IOP
  185. select PCI
  186. help
  187. Support for Intel's IOP33X (XScale) family of processors.
  188. config ARCH_IOP13XX
  189. bool "IOP13xx-based"
  190. select PCI
  191. help
  192. Support for Intel's IOP13XX (XScale) family of processors.
  193. config ARCH_IXP4XX
  194. bool "IXP4xx-based"
  195. depends on MMU
  196. select GENERIC_TIME
  197. help
  198. Support for Intel's IXP4XX (XScale) family of processors.
  199. config ARCH_IXP2000
  200. bool "IXP2400/2800-based"
  201. depends on MMU
  202. select PCI
  203. help
  204. Support for Intel's IXP2400/2800 (XScale) family of processors.
  205. config ARCH_IXP23XX
  206. bool "IXP23XX-based"
  207. depends on MMU
  208. select PCI
  209. help
  210. Support for Intel's IXP23xx (XScale) family of processors.
  211. config ARCH_L7200
  212. bool "LinkUp-L7200"
  213. select FIQ
  214. help
  215. Say Y here if you intend to run this kernel on a LinkUp Systems
  216. L7200 Software Development Board which uses an ARM720T processor.
  217. Information on this board can be obtained at:
  218. <http://www.linkupsys.com/>
  219. If you have any questions or comments about the Linux kernel port
  220. to this board, send e-mail to <sjhill@cotw.com>.
  221. config ARCH_NS9XXX
  222. bool "NetSilicon NS9xxx"
  223. help
  224. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  225. System.
  226. <http://www.digi.com/products/microprocessors/index.jsp>
  227. config ARCH_PNX4008
  228. bool "Philips Nexperia PNX4008 Mobile"
  229. help
  230. This enables support for Philips PNX4008 mobile platform.
  231. config ARCH_PXA
  232. bool "PXA2xx-based"
  233. depends on MMU
  234. select ARCH_MTD_XIP
  235. help
  236. Support for Intel's PXA2XX processor line.
  237. config ARCH_RPC
  238. bool "RiscPC"
  239. select ARCH_ACORN
  240. select FIQ
  241. select TIMER_ACORN
  242. select ARCH_MAY_HAVE_PC_FDC
  243. select ISA_DMA_API
  244. help
  245. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  246. CD-ROM interface, serial and parallel port, and the floppy drive.
  247. config ARCH_SA1100
  248. bool "SA1100-based"
  249. select ISA
  250. select ARCH_DISCONTIGMEM_ENABLE
  251. select ARCH_MTD_XIP
  252. help
  253. Support for StrongARM 11x0 based boards.
  254. config ARCH_S3C2410
  255. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
  256. help
  257. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  258. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  259. the Samsung SMDK2410 development board (and derivatives).
  260. config ARCH_SHARK
  261. bool "Shark"
  262. select ISA
  263. select ISA_DMA
  264. select PCI
  265. help
  266. Support for the StrongARM based Digital DNARD machine, also known
  267. as "Shark" (<http://www.shark-linux.de/shark.html>).
  268. config ARCH_LH7A40X
  269. bool "Sharp LH7A40X"
  270. help
  271. Say Y here for systems based on one of the Sharp LH7A40X
  272. System on a Chip processors. These CPUs include an ARM922T
  273. core with a wide array of integrated devices for
  274. hand-held and low-power applications.
  275. config ARCH_OMAP
  276. bool "TI OMAP"
  277. help
  278. Support for TI's OMAP platform (OMAP1 and OMAP2).
  279. endchoice
  280. source "arch/arm/mach-clps711x/Kconfig"
  281. source "arch/arm/mach-ep93xx/Kconfig"
  282. source "arch/arm/mach-footbridge/Kconfig"
  283. source "arch/arm/mach-integrator/Kconfig"
  284. source "arch/arm/mach-iop32x/Kconfig"
  285. source "arch/arm/mach-iop33x/Kconfig"
  286. source "arch/arm/mach-iop13xx/Kconfig"
  287. source "arch/arm/mach-ixp4xx/Kconfig"
  288. source "arch/arm/mach-ixp2000/Kconfig"
  289. source "arch/arm/mach-ixp23xx/Kconfig"
  290. source "arch/arm/mach-pxa/Kconfig"
  291. source "arch/arm/mach-sa1100/Kconfig"
  292. source "arch/arm/plat-omap/Kconfig"
  293. source "arch/arm/mach-omap1/Kconfig"
  294. source "arch/arm/mach-omap2/Kconfig"
  295. source "arch/arm/mach-s3c2410/Kconfig"
  296. source "arch/arm/mach-lh7a40x/Kconfig"
  297. source "arch/arm/mach-imx/Kconfig"
  298. source "arch/arm/mach-h720x/Kconfig"
  299. source "arch/arm/mach-versatile/Kconfig"
  300. source "arch/arm/mach-aaec2000/Kconfig"
  301. source "arch/arm/mach-realview/Kconfig"
  302. source "arch/arm/mach-at91rm9200/Kconfig"
  303. source "arch/arm/mach-netx/Kconfig"
  304. source "arch/arm/mach-ns9xxx/Kconfig"
  305. # Definitions to make life easier
  306. config ARCH_ACORN
  307. bool
  308. config PLAT_IOP
  309. bool
  310. source arch/arm/mm/Kconfig
  311. config IWMMXT
  312. bool "Enable iWMMXt support"
  313. depends CPU_XSCALE || CPU_XSC3
  314. default y if PXA27x
  315. help
  316. Enable support for iWMMXt context switching at run time if
  317. running on a CPU that supports it.
  318. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  319. config XSCALE_PMU
  320. bool
  321. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  322. default y
  323. if !MMU
  324. source "arch/arm/Kconfig-nommu"
  325. endif
  326. endmenu
  327. source "arch/arm/common/Kconfig"
  328. config FORCE_MAX_ZONEORDER
  329. int
  330. depends on SA1111
  331. default "9"
  332. menu "Bus support"
  333. config ARM_AMBA
  334. bool
  335. config ISA
  336. bool
  337. help
  338. Find out whether you have ISA slots on your motherboard. ISA is the
  339. name of a bus system, i.e. the way the CPU talks to the other stuff
  340. inside your box. Other bus systems are PCI, EISA, MicroChannel
  341. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  342. newer boards don't support it. If you have ISA, say Y, otherwise N.
  343. # Select ISA DMA controller support
  344. config ISA_DMA
  345. bool
  346. select ISA_DMA_API
  347. # Select ISA DMA interface
  348. config ISA_DMA_API
  349. bool
  350. config PCI
  351. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
  352. help
  353. Find out whether you have a PCI motherboard. PCI is the name of a
  354. bus system, i.e. the way the CPU talks to the other stuff inside
  355. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  356. VESA. If you have PCI, say Y, otherwise N.
  357. The PCI-HOWTO, available from
  358. <http://www.tldp.org/docs.html#howto>, contains valuable
  359. information about which PCI hardware does work under Linux and which
  360. doesn't.
  361. # Select the host bridge type
  362. config PCI_HOST_VIA82C505
  363. bool
  364. depends on PCI && ARCH_SHARK
  365. default y
  366. source "drivers/pci/Kconfig"
  367. source "drivers/pcmcia/Kconfig"
  368. endmenu
  369. menu "Kernel Features"
  370. config SMP
  371. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  372. depends on EXPERIMENTAL && REALVIEW_MPCORE
  373. help
  374. This enables support for systems with more than one CPU. If you have
  375. a system with only one CPU, like most personal computers, say N. If
  376. you have a system with more than one CPU, say Y.
  377. If you say N here, the kernel will run on single and multiprocessor
  378. machines, but will use only one CPU of a multiprocessor machine. If
  379. you say Y here, the kernel will run on many, but not all, single
  380. processor machines. On a single processor machine, the kernel will
  381. run faster if you say N here.
  382. See also the <file:Documentation/smp.txt>,
  383. <file:Documentation/i386/IO-APIC.txt>,
  384. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  385. <http://www.linuxdoc.org/docs.html#howto>.
  386. If you don't know what to do here, say N.
  387. config NR_CPUS
  388. int "Maximum number of CPUs (2-32)"
  389. range 2 32
  390. depends on SMP
  391. default "4"
  392. config HOTPLUG_CPU
  393. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  394. depends on SMP && HOTPLUG && EXPERIMENTAL
  395. help
  396. Say Y here to experiment with turning CPUs off and on. CPUs
  397. can be controlled through /sys/devices/system/cpu.
  398. config LOCAL_TIMERS
  399. bool "Use local timer interrupts"
  400. depends on SMP && REALVIEW_MPCORE
  401. default y
  402. help
  403. Enable support for local timers on SMP platforms, rather then the
  404. legacy IPI broadcast method. Local timers allows the system
  405. accounting to be spread across the timer interval, preventing a
  406. "thundering herd" at every timer tick.
  407. config PREEMPT
  408. bool "Preemptible Kernel (EXPERIMENTAL)"
  409. depends on EXPERIMENTAL
  410. help
  411. This option reduces the latency of the kernel when reacting to
  412. real-time or interactive events by allowing a low priority process to
  413. be preempted even if it is in kernel mode executing a system call.
  414. This allows applications to run more reliably even when the system is
  415. under load.
  416. Say Y here if you are building a kernel for a desktop, embedded
  417. or real-time system. Say N if you are unsure.
  418. config NO_IDLE_HZ
  419. bool "Dynamic tick timer"
  420. help
  421. Select this option if you want to disable continuous timer ticks
  422. and have them programmed to occur as required. This option saves
  423. power as the system can remain in idle state for longer.
  424. By default dynamic tick is disabled during the boot, and can be
  425. manually enabled with:
  426. echo 1 > /sys/devices/system/timer/timer0/dyn_tick
  427. Alternatively, if you want dynamic tick automatically enabled
  428. during boot, pass "dyntick=enable" via the kernel command string.
  429. Please note that dynamic tick may affect the accuracy of
  430. timekeeping on some platforms depending on the implementation.
  431. Currently at least OMAP, PXA2xx and SA11x0 platforms are known
  432. to have accurate timekeeping with dynamic tick.
  433. config HZ
  434. int
  435. default 128 if ARCH_L7200
  436. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  437. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  438. default 100
  439. config AEABI
  440. bool "Use the ARM EABI to compile the kernel"
  441. help
  442. This option allows for the kernel to be compiled using the latest
  443. ARM ABI (aka EABI). This is only useful if you are using a user
  444. space environment that is also compiled with EABI.
  445. Since there are major incompatibilities between the legacy ABI and
  446. EABI, especially with regard to structure member alignment, this
  447. option also changes the kernel syscall calling convention to
  448. disambiguate both ABIs and allow for backward compatibility support
  449. (selected with CONFIG_OABI_COMPAT).
  450. To use this you need GCC version 4.0.0 or later.
  451. config OABI_COMPAT
  452. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  453. depends on AEABI && EXPERIMENTAL
  454. default y
  455. help
  456. This option preserves the old syscall interface along with the
  457. new (ARM EABI) one. It also provides a compatibility layer to
  458. intercept syscalls that have structure arguments which layout
  459. in memory differs between the legacy ABI and the new ARM EABI
  460. (only for non "thumb" binaries). This option adds a tiny
  461. overhead to all syscalls and produces a slightly larger kernel.
  462. If you know you'll be using only pure EABI user space then you
  463. can say N here. If this option is not selected and you attempt
  464. to execute a legacy ABI binary then the result will be
  465. UNPREDICTABLE (in fact it can be predicted that it won't work
  466. at all). If in doubt say Y.
  467. config ARCH_DISCONTIGMEM_ENABLE
  468. bool
  469. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  470. help
  471. Say Y to support efficient handling of discontiguous physical memory,
  472. for architectures which are either NUMA (Non-Uniform Memory Access)
  473. or have huge holes in the physical address space for other reasons.
  474. See <file:Documentation/vm/numa> for more.
  475. config NODES_SHIFT
  476. int
  477. default "4" if ARCH_LH7A40X
  478. default "2"
  479. depends on NEED_MULTIPLE_NODES
  480. source "mm/Kconfig"
  481. config LEDS
  482. bool "Timer and CPU usage LEDs"
  483. depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
  484. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  485. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  486. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  487. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  488. ARCH_AT91 || MACH_TRIZEPS4
  489. help
  490. If you say Y here, the LEDs on your machine will be used
  491. to provide useful information about your current system status.
  492. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  493. be able to select which LEDs are active using the options below. If
  494. you are compiling a kernel for the EBSA-110 or the LART however, the
  495. red LED will simply flash regularly to indicate that the system is
  496. still functional. It is safe to say Y here if you have a CATS
  497. system, but the driver will do nothing.
  498. config LEDS_TIMER
  499. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  500. MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  501. depends on LEDS
  502. default y if ARCH_EBSA110
  503. help
  504. If you say Y here, one of the system LEDs (the green one on the
  505. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  506. will flash regularly to indicate that the system is still
  507. operational. This is mainly useful to kernel hackers who are
  508. debugging unstable kernels.
  509. The LART uses the same LED for both Timer LED and CPU usage LED
  510. functions. You may choose to use both, but the Timer LED function
  511. will overrule the CPU usage LED.
  512. config LEDS_CPU
  513. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  514. !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  515. depends on LEDS
  516. help
  517. If you say Y here, the red LED will be used to give a good real
  518. time indication of CPU usage, by lighting whenever the idle task
  519. is not currently executing.
  520. The LART uses the same LED for both Timer LED and CPU usage LED
  521. functions. You may choose to use both, but the Timer LED function
  522. will overrule the CPU usage LED.
  523. config ALIGNMENT_TRAP
  524. bool
  525. depends on CPU_CP15_MMU
  526. default y if !ARCH_EBSA110
  527. help
  528. ARM processors cannot fetch/store information which is not
  529. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  530. address divisible by 4. On 32-bit ARM processors, these non-aligned
  531. fetch/store instructions will be emulated in software if you say
  532. here, which has a severe performance impact. This is necessary for
  533. correct operation of some network protocols. With an IP-only
  534. configuration it is safe to say N, otherwise say Y.
  535. endmenu
  536. menu "Boot options"
  537. # Compressed boot loader in ROM. Yes, we really want to ask about
  538. # TEXT and BSS so we preserve their values in the config files.
  539. config ZBOOT_ROM_TEXT
  540. hex "Compressed ROM boot loader base address"
  541. default "0"
  542. help
  543. The physical address at which the ROM-able zImage is to be
  544. placed in the target. Platforms which normally make use of
  545. ROM-able zImage formats normally set this to a suitable
  546. value in their defconfig file.
  547. If ZBOOT_ROM is not enabled, this has no effect.
  548. config ZBOOT_ROM_BSS
  549. hex "Compressed ROM boot loader BSS address"
  550. default "0"
  551. help
  552. The base address of an area of read/write memory in the target
  553. for the ROM-able zImage which must be available while the
  554. decompressor is running. It must be large enough to hold the
  555. entire decompressed kernel plus an additional 128 KiB.
  556. Platforms which normally make use of ROM-able zImage formats
  557. normally set this to a suitable value in their defconfig file.
  558. If ZBOOT_ROM is not enabled, this has no effect.
  559. config ZBOOT_ROM
  560. bool "Compressed boot loader in ROM/flash"
  561. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  562. help
  563. Say Y here if you intend to execute your compressed kernel image
  564. (zImage) directly from ROM or flash. If unsure, say N.
  565. config CMDLINE
  566. string "Default kernel command string"
  567. default ""
  568. help
  569. On some architectures (EBSA110 and CATS), there is currently no way
  570. for the boot loader to pass arguments to the kernel. For these
  571. architectures, you should supply some command-line options at build
  572. time by entering them here. As a minimum, you should specify the
  573. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  574. config XIP_KERNEL
  575. bool "Kernel Execute-In-Place from ROM"
  576. depends on !ZBOOT_ROM
  577. help
  578. Execute-In-Place allows the kernel to run from non-volatile storage
  579. directly addressable by the CPU, such as NOR flash. This saves RAM
  580. space since the text section of the kernel is not loaded from flash
  581. to RAM. Read-write sections, such as the data section and stack,
  582. are still copied to RAM. The XIP kernel is not compressed since
  583. it has to run directly from flash, so it will take more space to
  584. store it. The flash address used to link the kernel object files,
  585. and for storing it, is configuration dependent. Therefore, if you
  586. say Y here, you must know the proper physical address where to
  587. store the kernel image depending on your own flash memory usage.
  588. Also note that the make target becomes "make xipImage" rather than
  589. "make zImage" or "make Image". The final kernel binary to put in
  590. ROM memory will be arch/arm/boot/xipImage.
  591. If unsure, say N.
  592. config XIP_PHYS_ADDR
  593. hex "XIP Kernel Physical Location"
  594. depends on XIP_KERNEL
  595. default "0x00080000"
  596. help
  597. This is the physical address in your flash memory the kernel will
  598. be linked for and stored to. This address is dependent on your
  599. own flash usage.
  600. endmenu
  601. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
  602. menu "CPU Frequency scaling"
  603. source "drivers/cpufreq/Kconfig"
  604. config CPU_FREQ_SA1100
  605. bool
  606. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  607. default y
  608. config CPU_FREQ_SA1110
  609. bool
  610. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  611. default y
  612. config CPU_FREQ_INTEGRATOR
  613. tristate "CPUfreq driver for ARM Integrator CPUs"
  614. depends on ARCH_INTEGRATOR && CPU_FREQ
  615. default y
  616. help
  617. This enables the CPUfreq driver for ARM Integrator CPUs.
  618. For details, take a look at <file:Documentation/cpu-freq>.
  619. If in doubt, say Y.
  620. config CPU_FREQ_IMX
  621. tristate "CPUfreq driver for i.MX CPUs"
  622. depends on ARCH_IMX && CPU_FREQ
  623. default n
  624. help
  625. This enables the CPUfreq driver for i.MX CPUs.
  626. If in doubt, say N.
  627. endmenu
  628. endif
  629. menu "Floating point emulation"
  630. comment "At least one emulation must be selected"
  631. config FPE_NWFPE
  632. bool "NWFPE math emulation"
  633. depends on !AEABI || OABI_COMPAT
  634. ---help---
  635. Say Y to include the NWFPE floating point emulator in the kernel.
  636. This is necessary to run most binaries. Linux does not currently
  637. support floating point hardware so you need to say Y here even if
  638. your machine has an FPA or floating point co-processor podule.
  639. You may say N here if you are going to load the Acorn FPEmulator
  640. early in the bootup.
  641. config FPE_NWFPE_XP
  642. bool "Support extended precision"
  643. depends on FPE_NWFPE
  644. help
  645. Say Y to include 80-bit support in the kernel floating-point
  646. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  647. Note that gcc does not generate 80-bit operations by default,
  648. so in most cases this option only enlarges the size of the
  649. floating point emulator without any good reason.
  650. You almost surely want to say N here.
  651. config FPE_FASTFPE
  652. bool "FastFPE math emulation (EXPERIMENTAL)"
  653. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  654. ---help---
  655. Say Y here to include the FAST floating point emulator in the kernel.
  656. This is an experimental much faster emulator which now also has full
  657. precision for the mantissa. It does not support any exceptions.
  658. It is very simple, and approximately 3-6 times faster than NWFPE.
  659. It should be sufficient for most programs. It may be not suitable
  660. for scientific calculations, but you have to check this for yourself.
  661. If you do not feel you need a faster FP emulation you should better
  662. choose NWFPE.
  663. config VFP
  664. bool "VFP-format floating point maths"
  665. depends on CPU_V6 || CPU_ARM926T
  666. help
  667. Say Y to include VFP support code in the kernel. This is needed
  668. if your hardware includes a VFP unit.
  669. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  670. release notes and additional status information.
  671. Say N if your target does not have VFP hardware.
  672. endmenu
  673. menu "Userspace binary formats"
  674. source "fs/Kconfig.binfmt"
  675. config ARTHUR
  676. tristate "RISC OS personality"
  677. depends on !AEABI
  678. help
  679. Say Y here to include the kernel code necessary if you want to run
  680. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  681. experimental; if this sounds frightening, say N and sleep in peace.
  682. You can also say M here to compile this support as a module (which
  683. will be called arthur).
  684. endmenu
  685. menu "Power management options"
  686. source "kernel/power/Kconfig"
  687. config APM
  688. tristate "Advanced Power Management Emulation"
  689. ---help---
  690. APM is a BIOS specification for saving power using several different
  691. techniques. This is mostly useful for battery powered laptops with
  692. APM compliant BIOSes. If you say Y here, the system time will be
  693. reset after a RESUME operation, the /proc/apm device will provide
  694. battery status information, and user-space programs will receive
  695. notification of APM "events" (e.g. battery status change).
  696. In order to use APM, you will need supporting software. For location
  697. and more information, read <file:Documentation/pm.txt> and the
  698. Battery Powered Linux mini-HOWTO, available from
  699. <http://www.tldp.org/docs.html#howto>.
  700. This driver does not spin down disk drives (see the hdparm(8)
  701. manpage ("man 8 hdparm") for that), and it doesn't turn off
  702. VESA-compliant "green" monitors.
  703. Generally, if you don't have a battery in your machine, there isn't
  704. much point in using this driver and you should say N. If you get
  705. random kernel OOPSes or reboots that don't seem to be related to
  706. anything, try disabling/enabling this option (or disabling/enabling
  707. APM in your BIOS).
  708. endmenu
  709. source "net/Kconfig"
  710. menu "Device Drivers"
  711. source "drivers/base/Kconfig"
  712. source "drivers/connector/Kconfig"
  713. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  714. source "drivers/mtd/Kconfig"
  715. endif
  716. source "drivers/parport/Kconfig"
  717. source "drivers/pnp/Kconfig"
  718. source "drivers/block/Kconfig"
  719. source "drivers/acorn/block/Kconfig"
  720. if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
  721. || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
  722. || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
  723. || ARCH_IXP23XX
  724. source "drivers/ide/Kconfig"
  725. endif
  726. source "drivers/scsi/Kconfig"
  727. source "drivers/ata/Kconfig"
  728. source "drivers/md/Kconfig"
  729. source "drivers/message/fusion/Kconfig"
  730. source "drivers/ieee1394/Kconfig"
  731. source "drivers/message/i2o/Kconfig"
  732. source "drivers/net/Kconfig"
  733. source "drivers/isdn/Kconfig"
  734. # input before char - char/joystick depends on it. As does USB.
  735. source "drivers/input/Kconfig"
  736. source "drivers/char/Kconfig"
  737. source "drivers/i2c/Kconfig"
  738. source "drivers/spi/Kconfig"
  739. source "drivers/w1/Kconfig"
  740. source "drivers/hwmon/Kconfig"
  741. #source "drivers/l3/Kconfig"
  742. source "drivers/misc/Kconfig"
  743. source "drivers/mfd/Kconfig"
  744. source "drivers/leds/Kconfig"
  745. source "drivers/media/Kconfig"
  746. source "drivers/video/Kconfig"
  747. source "sound/Kconfig"
  748. source "drivers/hid/Kconfig"
  749. source "drivers/usb/Kconfig"
  750. source "drivers/mmc/Kconfig"
  751. source "drivers/rtc/Kconfig"
  752. endmenu
  753. source "fs/Kconfig"
  754. source "arch/arm/oprofile/Kconfig"
  755. source "arch/arm/Kconfig.debug"
  756. source "security/Kconfig"
  757. source "crypto/Kconfig"
  758. source "lib/Kconfig"