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 GENERIC_BUST_SPINLOCK
  91. bool
  92. config ARCH_MAY_HAVE_PC_FDC
  93. bool
  94. config ZONE_DMA
  95. bool
  96. default y
  97. config GENERIC_ISA_DMA
  98. bool
  99. config FIQ
  100. bool
  101. config ARCH_MTD_XIP
  102. bool
  103. config VECTORS_BASE
  104. hex
  105. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  106. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  107. default 0x00000000
  108. help
  109. The base address of exception vectors.
  110. source "init/Kconfig"
  111. menu "System Type"
  112. choice
  113. prompt "ARM system type"
  114. default ARCH_VERSATILE
  115. config ARCH_AAEC2000
  116. bool "Agilent AAEC-2000 based"
  117. select ARM_AMBA
  118. help
  119. This enables support for systems based on the Agilent AAEC-2000
  120. config ARCH_INTEGRATOR
  121. bool "ARM Ltd. Integrator family"
  122. select ARM_AMBA
  123. select ICST525
  124. help
  125. Support for ARM's Integrator platform.
  126. config ARCH_REALVIEW
  127. bool "ARM Ltd. RealView family"
  128. select ARM_AMBA
  129. select ICST307
  130. help
  131. This enables support for ARM Ltd RealView boards.
  132. config ARCH_VERSATILE
  133. bool "ARM Ltd. Versatile family"
  134. select ARM_AMBA
  135. select ARM_VIC
  136. select ICST307
  137. select GENERIC_TIME
  138. select GENERIC_CLOCKEVENTS
  139. help
  140. This enables support for ARM Ltd Versatile board.
  141. config ARCH_AT91
  142. bool "Atmel AT91"
  143. select GENERIC_GPIO
  144. help
  145. This enables support for systems based on the Atmel AT91RM9200
  146. and AT91SAM9xxx processors.
  147. config ARCH_CLPS7500
  148. bool "Cirrus CL-PS7500FE"
  149. select TIMER_ACORN
  150. select ISA
  151. select NO_IOPORT
  152. help
  153. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  154. config ARCH_CLPS711X
  155. bool "Cirrus Logic CLPS711x/EP721x-based"
  156. help
  157. Support for Cirrus Logic 711x/721x based boards.
  158. config ARCH_CO285
  159. bool "Co-EBSA285"
  160. select FOOTBRIDGE
  161. select FOOTBRIDGE_ADDIN
  162. help
  163. Support for Intel's EBSA285 companion chip.
  164. config ARCH_EBSA110
  165. bool "EBSA-110"
  166. select ISA
  167. select NO_IOPORT
  168. help
  169. This is an evaluation board for the StrongARM processor available
  170. from Digital. It has limited hardware on-board, including an
  171. Ethernet interface, two PCMCIA sockets, two serial ports and a
  172. parallel port.
  173. config ARCH_EP93XX
  174. bool "EP93xx-based"
  175. select ARM_AMBA
  176. select ARM_VIC
  177. help
  178. This enables support for the Cirrus EP93xx series of CPUs.
  179. config ARCH_FOOTBRIDGE
  180. bool "FootBridge"
  181. select FOOTBRIDGE
  182. help
  183. Support for systems based on the DC21285 companion chip
  184. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  185. config ARCH_NETX
  186. bool "Hilscher NetX based"
  187. select ARM_VIC
  188. help
  189. This enables support for systems based on the Hilscher NetX Soc
  190. config ARCH_H720X
  191. bool "Hynix HMS720x-based"
  192. select ISA_DMA_API
  193. help
  194. This enables support for systems based on the Hynix HMS720x
  195. config ARCH_IMX
  196. bool "IMX"
  197. help
  198. Support for Motorola's i.MX family of processors (MX1, MXL).
  199. config ARCH_IOP32X
  200. bool "IOP32x-based"
  201. depends on MMU
  202. select PLAT_IOP
  203. select PCI
  204. help
  205. Support for Intel's 80219 and IOP32X (XScale) family of
  206. processors.
  207. config ARCH_IOP33X
  208. bool "IOP33x-based"
  209. depends on MMU
  210. select PLAT_IOP
  211. select PCI
  212. help
  213. Support for Intel's IOP33X (XScale) family of processors.
  214. config ARCH_IOP13XX
  215. bool "IOP13xx-based"
  216. depends on MMU
  217. select PLAT_IOP
  218. select PCI
  219. select ARCH_SUPPORTS_MSI
  220. help
  221. Support for Intel's IOP13XX (XScale) family of processors.
  222. config ARCH_IXP4XX
  223. bool "IXP4xx-based"
  224. depends on MMU
  225. select GENERIC_TIME
  226. select GENERIC_CLOCKEVENTS
  227. help
  228. Support for Intel's IXP4XX (XScale) family of processors.
  229. config ARCH_IXP2000
  230. bool "IXP2400/2800-based"
  231. depends on MMU
  232. select PCI
  233. help
  234. Support for Intel's IXP2400/2800 (XScale) family of processors.
  235. config ARCH_IXP23XX
  236. bool "IXP23XX-based"
  237. depends on MMU
  238. select PCI
  239. help
  240. Support for Intel's IXP23xx (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_NS9XXX
  252. bool "NetSilicon NS9xxx"
  253. help
  254. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  255. System.
  256. <http://www.digi.com/products/microprocessors/index.jsp>
  257. config ARCH_PNX4008
  258. bool "Philips Nexperia PNX4008 Mobile"
  259. help
  260. This enables support for Philips PNX4008 mobile platform.
  261. config ARCH_PXA
  262. bool "PXA2xx-based"
  263. depends on MMU
  264. select ARCH_MTD_XIP
  265. select GENERIC_GPIO
  266. select GENERIC_TIME
  267. help
  268. Support for Intel's PXA2XX processor line.
  269. config ARCH_RPC
  270. bool "RiscPC"
  271. select ARCH_ACORN
  272. select FIQ
  273. select TIMER_ACORN
  274. select ARCH_MAY_HAVE_PC_FDC
  275. select ISA_DMA_API
  276. select NO_IOPORT
  277. help
  278. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  279. CD-ROM interface, serial and parallel port, and the floppy drive.
  280. config ARCH_SA1100
  281. bool "SA1100-based"
  282. select ISA
  283. select ARCH_DISCONTIGMEM_ENABLE
  284. select ARCH_MTD_XIP
  285. select GENERIC_GPIO
  286. help
  287. Support for StrongARM 11x0 based boards.
  288. config ARCH_S3C2410
  289. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  290. select GENERIC_GPIO
  291. help
  292. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  293. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  294. the Samsung SMDK2410 development board (and derivatives).
  295. config ARCH_SHARK
  296. bool "Shark"
  297. select ISA
  298. select ISA_DMA
  299. select PCI
  300. help
  301. Support for the StrongARM based Digital DNARD machine, also known
  302. as "Shark" (<http://www.shark-linux.de/shark.html>).
  303. config ARCH_LH7A40X
  304. bool "Sharp LH7A40X"
  305. help
  306. Say Y here for systems based on one of the Sharp LH7A40X
  307. System on a Chip processors. These CPUs include an ARM922T
  308. core with a wide array of integrated devices for
  309. hand-held and low-power applications.
  310. config ARCH_OMAP
  311. bool "TI OMAP"
  312. select GENERIC_GPIO
  313. select GENERIC_TIME
  314. help
  315. Support for TI's OMAP platform (OMAP1 and OMAP2).
  316. endchoice
  317. source "arch/arm/mach-clps711x/Kconfig"
  318. source "arch/arm/mach-ep93xx/Kconfig"
  319. source "arch/arm/mach-footbridge/Kconfig"
  320. source "arch/arm/mach-integrator/Kconfig"
  321. source "arch/arm/mach-iop32x/Kconfig"
  322. source "arch/arm/mach-iop33x/Kconfig"
  323. source "arch/arm/mach-iop13xx/Kconfig"
  324. source "arch/arm/mach-ixp4xx/Kconfig"
  325. source "arch/arm/mach-ixp2000/Kconfig"
  326. source "arch/arm/mach-ixp23xx/Kconfig"
  327. source "arch/arm/mach-pxa/Kconfig"
  328. source "arch/arm/mach-sa1100/Kconfig"
  329. source "arch/arm/plat-omap/Kconfig"
  330. source "arch/arm/mach-omap1/Kconfig"
  331. source "arch/arm/mach-omap2/Kconfig"
  332. source "arch/arm/plat-s3c24xx/Kconfig"
  333. if ARCH_S3C2410
  334. source "arch/arm/mach-s3c2400/Kconfig"
  335. source "arch/arm/mach-s3c2410/Kconfig"
  336. source "arch/arm/mach-s3c2412/Kconfig"
  337. source "arch/arm/mach-s3c2440/Kconfig"
  338. source "arch/arm/mach-s3c2442/Kconfig"
  339. source "arch/arm/mach-s3c2443/Kconfig"
  340. endif
  341. source "arch/arm/mach-lh7a40x/Kconfig"
  342. source "arch/arm/mach-imx/Kconfig"
  343. source "arch/arm/mach-h720x/Kconfig"
  344. source "arch/arm/mach-versatile/Kconfig"
  345. source "arch/arm/mach-aaec2000/Kconfig"
  346. source "arch/arm/mach-realview/Kconfig"
  347. source "arch/arm/mach-at91/Kconfig"
  348. source "arch/arm/mach-netx/Kconfig"
  349. source "arch/arm/mach-ns9xxx/Kconfig"
  350. # Definitions to make life easier
  351. config ARCH_ACORN
  352. bool
  353. config PLAT_IOP
  354. bool
  355. source arch/arm/mm/Kconfig
  356. config IWMMXT
  357. bool "Enable iWMMXt support"
  358. depends on CPU_XSCALE || CPU_XSC3
  359. default y if PXA27x
  360. help
  361. Enable support for iWMMXt context switching at run time if
  362. running on a CPU that supports it.
  363. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  364. config XSCALE_PMU
  365. bool
  366. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  367. default y
  368. if !MMU
  369. source "arch/arm/Kconfig-nommu"
  370. endif
  371. endmenu
  372. source "arch/arm/common/Kconfig"
  373. config FORCE_MAX_ZONEORDER
  374. int
  375. depends on SA1111
  376. default "9"
  377. menu "Bus support"
  378. config ARM_AMBA
  379. bool
  380. config ISA
  381. bool
  382. help
  383. Find out whether you have ISA slots on your motherboard. ISA is the
  384. name of a bus system, i.e. the way the CPU talks to the other stuff
  385. inside your box. Other bus systems are PCI, EISA, MicroChannel
  386. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  387. newer boards don't support it. If you have ISA, say Y, otherwise N.
  388. # Select ISA DMA controller support
  389. config ISA_DMA
  390. bool
  391. select ISA_DMA_API
  392. # Select ISA DMA interface
  393. config ISA_DMA_API
  394. bool
  395. config PCI
  396. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
  397. help
  398. Find out whether you have a PCI motherboard. PCI is the name of a
  399. bus system, i.e. the way the CPU talks to the other stuff inside
  400. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  401. VESA. If you have PCI, say Y, otherwise N.
  402. The PCI-HOWTO, available from
  403. <http://www.tldp.org/docs.html#howto>, contains valuable
  404. information about which PCI hardware does work under Linux and which
  405. doesn't.
  406. # Select the host bridge type
  407. config PCI_HOST_VIA82C505
  408. bool
  409. depends on PCI && ARCH_SHARK
  410. default y
  411. source "drivers/pci/Kconfig"
  412. source "drivers/pcmcia/Kconfig"
  413. endmenu
  414. menu "Kernel Features"
  415. source "kernel/time/Kconfig"
  416. config SMP
  417. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  418. depends on EXPERIMENTAL && REALVIEW_MPCORE
  419. help
  420. This enables support for systems with more than one CPU. If you have
  421. a system with only one CPU, like most personal computers, say N. If
  422. you have a system with more than one CPU, say Y.
  423. If you say N here, the kernel will run on single and multiprocessor
  424. machines, but will use only one CPU of a multiprocessor machine. If
  425. you say Y here, the kernel will run on many, but not all, single
  426. processor machines. On a single processor machine, the kernel will
  427. run faster if you say N here.
  428. See also the <file:Documentation/smp.txt>,
  429. <file:Documentation/i386/IO-APIC.txt>,
  430. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  431. <http://www.linuxdoc.org/docs.html#howto>.
  432. If you don't know what to do here, say N.
  433. config NR_CPUS
  434. int "Maximum number of CPUs (2-32)"
  435. range 2 32
  436. depends on SMP
  437. default "4"
  438. config HOTPLUG_CPU
  439. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  440. depends on SMP && HOTPLUG && EXPERIMENTAL
  441. help
  442. Say Y here to experiment with turning CPUs off and on. CPUs
  443. can be controlled through /sys/devices/system/cpu.
  444. config LOCAL_TIMERS
  445. bool "Use local timer interrupts"
  446. depends on SMP && REALVIEW_MPCORE
  447. default y
  448. help
  449. Enable support for local timers on SMP platforms, rather then the
  450. legacy IPI broadcast method. Local timers allows the system
  451. accounting to be spread across the timer interval, preventing a
  452. "thundering herd" at every timer tick.
  453. config PREEMPT
  454. bool "Preemptible Kernel (EXPERIMENTAL)"
  455. depends on EXPERIMENTAL
  456. help
  457. This option reduces the latency of the kernel when reacting to
  458. real-time or interactive events by allowing a low priority process to
  459. be preempted even if it is in kernel mode executing a system call.
  460. This allows applications to run more reliably even when the system is
  461. under load.
  462. Say Y here if you are building a kernel for a desktop, embedded
  463. or real-time system. Say N if you are unsure.
  464. config NO_IDLE_HZ
  465. bool "Dynamic tick timer"
  466. depends on !GENERIC_CLOCKEVENTS
  467. help
  468. Select this option if you want to disable continuous timer ticks
  469. and have them programmed to occur as required. This option saves
  470. power as the system can remain in idle state for longer.
  471. By default dynamic tick is disabled during the boot, and can be
  472. manually enabled with:
  473. echo 1 > /sys/devices/system/timer/timer0/dyn_tick
  474. Alternatively, if you want dynamic tick automatically enabled
  475. during boot, pass "dyntick=enable" via the kernel command string.
  476. Please note that dynamic tick may affect the accuracy of
  477. timekeeping on some platforms depending on the implementation.
  478. Currently at least OMAP, PXA2xx and SA11x0 platforms are known
  479. to have accurate timekeeping with dynamic tick.
  480. config HZ
  481. int
  482. default 128 if ARCH_L7200
  483. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  484. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  485. default 100
  486. config AEABI
  487. bool "Use the ARM EABI to compile the kernel"
  488. help
  489. This option allows for the kernel to be compiled using the latest
  490. ARM ABI (aka EABI). This is only useful if you are using a user
  491. space environment that is also compiled with EABI.
  492. Since there are major incompatibilities between the legacy ABI and
  493. EABI, especially with regard to structure member alignment, this
  494. option also changes the kernel syscall calling convention to
  495. disambiguate both ABIs and allow for backward compatibility support
  496. (selected with CONFIG_OABI_COMPAT).
  497. To use this you need GCC version 4.0.0 or later.
  498. config OABI_COMPAT
  499. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  500. depends on AEABI && EXPERIMENTAL
  501. default y
  502. help
  503. This option preserves the old syscall interface along with the
  504. new (ARM EABI) one. It also provides a compatibility layer to
  505. intercept syscalls that have structure arguments which layout
  506. in memory differs between the legacy ABI and the new ARM EABI
  507. (only for non "thumb" binaries). This option adds a tiny
  508. overhead to all syscalls and produces a slightly larger kernel.
  509. If you know you'll be using only pure EABI user space then you
  510. can say N here. If this option is not selected and you attempt
  511. to execute a legacy ABI binary then the result will be
  512. UNPREDICTABLE (in fact it can be predicted that it won't work
  513. at all). If in doubt say Y.
  514. config ARCH_DISCONTIGMEM_ENABLE
  515. bool
  516. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  517. help
  518. Say Y to support efficient handling of discontiguous physical memory,
  519. for architectures which are either NUMA (Non-Uniform Memory Access)
  520. or have huge holes in the physical address space for other reasons.
  521. See <file:Documentation/vm/numa> for more.
  522. config NODES_SHIFT
  523. int
  524. default "4" if ARCH_LH7A40X
  525. default "2"
  526. depends on NEED_MULTIPLE_NODES
  527. source "mm/Kconfig"
  528. config LEDS
  529. bool "Timer and CPU usage LEDs"
  530. depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
  531. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  532. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  533. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  534. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  535. ARCH_AT91 || MACH_TRIZEPS4
  536. help
  537. If you say Y here, the LEDs on your machine will be used
  538. to provide useful information about your current system status.
  539. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  540. be able to select which LEDs are active using the options below. If
  541. you are compiling a kernel for the EBSA-110 or the LART however, the
  542. red LED will simply flash regularly to indicate that the system is
  543. still functional. It is safe to say Y here if you have a CATS
  544. system, but the driver will do nothing.
  545. config LEDS_TIMER
  546. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  547. MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  548. depends on LEDS
  549. depends on !GENERIC_CLOCKEVENTS
  550. default y if ARCH_EBSA110
  551. help
  552. If you say Y here, one of the system LEDs (the green one on the
  553. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  554. will flash regularly to indicate that the system is still
  555. operational. This is mainly useful to kernel hackers who are
  556. debugging unstable kernels.
  557. The LART uses the same LED for both Timer LED and CPU usage LED
  558. functions. You may choose to use both, but the Timer LED function
  559. will overrule the CPU usage LED.
  560. config LEDS_CPU
  561. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  562. !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  563. depends on LEDS
  564. help
  565. If you say Y here, the red LED will be used to give a good real
  566. time indication of CPU usage, by lighting whenever the idle task
  567. is not currently executing.
  568. The LART uses the same LED for both Timer LED and CPU usage LED
  569. functions. You may choose to use both, but the Timer LED function
  570. will overrule the CPU usage LED.
  571. config ALIGNMENT_TRAP
  572. bool
  573. depends on CPU_CP15_MMU
  574. default y if !ARCH_EBSA110
  575. help
  576. ARM processors cannot fetch/store information which is not
  577. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  578. address divisible by 4. On 32-bit ARM processors, these non-aligned
  579. fetch/store instructions will be emulated in software if you say
  580. here, which has a severe performance impact. This is necessary for
  581. correct operation of some network protocols. With an IP-only
  582. configuration it is safe to say N, otherwise say Y.
  583. endmenu
  584. menu "Boot options"
  585. # Compressed boot loader in ROM. Yes, we really want to ask about
  586. # TEXT and BSS so we preserve their values in the config files.
  587. config ZBOOT_ROM_TEXT
  588. hex "Compressed ROM boot loader base address"
  589. default "0"
  590. help
  591. The physical address at which the ROM-able zImage is to be
  592. placed in the target. Platforms which normally make use of
  593. ROM-able zImage formats normally set this to a suitable
  594. value in their defconfig file.
  595. If ZBOOT_ROM is not enabled, this has no effect.
  596. config ZBOOT_ROM_BSS
  597. hex "Compressed ROM boot loader BSS address"
  598. default "0"
  599. help
  600. The base address of an area of read/write memory in the target
  601. for the ROM-able zImage which must be available while the
  602. decompressor is running. It must be large enough to hold the
  603. entire decompressed kernel plus an additional 128 KiB.
  604. Platforms which normally make use of ROM-able zImage formats
  605. normally set this to a suitable value in their defconfig file.
  606. If ZBOOT_ROM is not enabled, this has no effect.
  607. config ZBOOT_ROM
  608. bool "Compressed boot loader in ROM/flash"
  609. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  610. help
  611. Say Y here if you intend to execute your compressed kernel image
  612. (zImage) directly from ROM or flash. If unsure, say N.
  613. config CMDLINE
  614. string "Default kernel command string"
  615. default ""
  616. help
  617. On some architectures (EBSA110 and CATS), there is currently no way
  618. for the boot loader to pass arguments to the kernel. For these
  619. architectures, you should supply some command-line options at build
  620. time by entering them here. As a minimum, you should specify the
  621. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  622. config XIP_KERNEL
  623. bool "Kernel Execute-In-Place from ROM"
  624. depends on !ZBOOT_ROM
  625. help
  626. Execute-In-Place allows the kernel to run from non-volatile storage
  627. directly addressable by the CPU, such as NOR flash. This saves RAM
  628. space since the text section of the kernel is not loaded from flash
  629. to RAM. Read-write sections, such as the data section and stack,
  630. are still copied to RAM. The XIP kernel is not compressed since
  631. it has to run directly from flash, so it will take more space to
  632. store it. The flash address used to link the kernel object files,
  633. and for storing it, is configuration dependent. Therefore, if you
  634. say Y here, you must know the proper physical address where to
  635. store the kernel image depending on your own flash memory usage.
  636. Also note that the make target becomes "make xipImage" rather than
  637. "make zImage" or "make Image". The final kernel binary to put in
  638. ROM memory will be arch/arm/boot/xipImage.
  639. If unsure, say N.
  640. config XIP_PHYS_ADDR
  641. hex "XIP Kernel Physical Location"
  642. depends on XIP_KERNEL
  643. default "0x00080000"
  644. help
  645. This is the physical address in your flash memory the kernel will
  646. be linked for and stored to. This address is dependent on your
  647. own flash usage.
  648. config KEXEC
  649. bool "Kexec system call (EXPERIMENTAL)"
  650. depends on EXPERIMENTAL
  651. help
  652. kexec is a system call that implements the ability to shutdown your
  653. current kernel, and to start another kernel. It is like a reboot
  654. but it is indepedent of the system firmware. And like a reboot
  655. you can start any kernel with it, not just Linux.
  656. It is an ongoing process to be certain the hardware in a machine
  657. is properly shutdown, so do not be surprised if this code does not
  658. initially work for you. It may help to enable device hotplugging
  659. support.
  660. endmenu
  661. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
  662. menu "CPU Frequency scaling"
  663. source "drivers/cpufreq/Kconfig"
  664. config CPU_FREQ_SA1100
  665. bool
  666. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  667. default y
  668. config CPU_FREQ_SA1110
  669. bool
  670. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  671. default y
  672. config CPU_FREQ_INTEGRATOR
  673. tristate "CPUfreq driver for ARM Integrator CPUs"
  674. depends on ARCH_INTEGRATOR && CPU_FREQ
  675. default y
  676. help
  677. This enables the CPUfreq driver for ARM Integrator CPUs.
  678. For details, take a look at <file:Documentation/cpu-freq>.
  679. If in doubt, say Y.
  680. config CPU_FREQ_IMX
  681. tristate "CPUfreq driver for i.MX CPUs"
  682. depends on ARCH_IMX && CPU_FREQ
  683. default n
  684. help
  685. This enables the CPUfreq driver for i.MX CPUs.
  686. If in doubt, say N.
  687. endmenu
  688. endif
  689. menu "Floating point emulation"
  690. comment "At least one emulation must be selected"
  691. config FPE_NWFPE
  692. bool "NWFPE math emulation"
  693. depends on !AEABI || OABI_COMPAT
  694. ---help---
  695. Say Y to include the NWFPE floating point emulator in the kernel.
  696. This is necessary to run most binaries. Linux does not currently
  697. support floating point hardware so you need to say Y here even if
  698. your machine has an FPA or floating point co-processor podule.
  699. You may say N here if you are going to load the Acorn FPEmulator
  700. early in the bootup.
  701. config FPE_NWFPE_XP
  702. bool "Support extended precision"
  703. depends on FPE_NWFPE
  704. help
  705. Say Y to include 80-bit support in the kernel floating-point
  706. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  707. Note that gcc does not generate 80-bit operations by default,
  708. so in most cases this option only enlarges the size of the
  709. floating point emulator without any good reason.
  710. You almost surely want to say N here.
  711. config FPE_FASTFPE
  712. bool "FastFPE math emulation (EXPERIMENTAL)"
  713. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  714. ---help---
  715. Say Y here to include the FAST floating point emulator in the kernel.
  716. This is an experimental much faster emulator which now also has full
  717. precision for the mantissa. It does not support any exceptions.
  718. It is very simple, and approximately 3-6 times faster than NWFPE.
  719. It should be sufficient for most programs. It may be not suitable
  720. for scientific calculations, but you have to check this for yourself.
  721. If you do not feel you need a faster FP emulation you should better
  722. choose NWFPE.
  723. config VFP
  724. bool "VFP-format floating point maths"
  725. depends on CPU_V6 || CPU_ARM926T
  726. help
  727. Say Y to include VFP support code in the kernel. This is needed
  728. if your hardware includes a VFP unit.
  729. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  730. release notes and additional status information.
  731. Say N if your target does not have VFP hardware.
  732. endmenu
  733. menu "Userspace binary formats"
  734. source "fs/Kconfig.binfmt"
  735. config ARTHUR
  736. tristate "RISC OS personality"
  737. depends on !AEABI
  738. help
  739. Say Y here to include the kernel code necessary if you want to run
  740. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  741. experimental; if this sounds frightening, say N and sleep in peace.
  742. You can also say M here to compile this support as a module (which
  743. will be called arthur).
  744. endmenu
  745. menu "Power management options"
  746. source "kernel/power/Kconfig"
  747. endmenu
  748. source "net/Kconfig"
  749. menu "Device Drivers"
  750. source "drivers/base/Kconfig"
  751. source "drivers/connector/Kconfig"
  752. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  753. source "drivers/mtd/Kconfig"
  754. endif
  755. source "drivers/parport/Kconfig"
  756. source "drivers/pnp/Kconfig"
  757. source "drivers/block/Kconfig"
  758. source "drivers/acorn/block/Kconfig"
  759. if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
  760. || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
  761. || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
  762. || ARCH_IXP23XX
  763. source "drivers/ide/Kconfig"
  764. endif
  765. source "drivers/scsi/Kconfig"
  766. source "drivers/ata/Kconfig"
  767. source "drivers/md/Kconfig"
  768. source "drivers/message/fusion/Kconfig"
  769. source "drivers/ieee1394/Kconfig"
  770. source "drivers/message/i2o/Kconfig"
  771. source "drivers/net/Kconfig"
  772. source "drivers/isdn/Kconfig"
  773. # input before char - char/joystick depends on it. As does USB.
  774. source "drivers/input/Kconfig"
  775. source "drivers/char/Kconfig"
  776. source "drivers/i2c/Kconfig"
  777. source "drivers/spi/Kconfig"
  778. source "drivers/w1/Kconfig"
  779. source "drivers/hwmon/Kconfig"
  780. #source "drivers/l3/Kconfig"
  781. source "drivers/misc/Kconfig"
  782. source "drivers/mfd/Kconfig"
  783. source "drivers/leds/Kconfig"
  784. source "drivers/media/Kconfig"
  785. source "drivers/video/Kconfig"
  786. source "sound/Kconfig"
  787. source "drivers/hid/Kconfig"
  788. source "drivers/usb/Kconfig"
  789. source "drivers/mmc/Kconfig"
  790. source "drivers/rtc/Kconfig"
  791. endmenu
  792. source "fs/Kconfig"
  793. source "arch/arm/oprofile/Kconfig"
  794. source "arch/arm/Kconfig.debug"
  795. source "security/Kconfig"
  796. source "crypto/Kconfig"
  797. source "lib/Kconfig"