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