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