Kconfig 26 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950
  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see Documentation/kbuild/kconfig-language.txt.
  4. #
  5. mainmenu "Linux Kernel Configuration"
  6. config ARM
  7. bool
  8. default y
  9. select RTC_LIB
  10. help
  11. The ARM series is a line of low-power-consumption RISC chip designs
  12. licensed by ARM Ltd and targeted at embedded applications and
  13. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  14. manufactured, but legacy ARM-based PC hardware remains popular in
  15. Europe. There is an ARM Linux project with a web page at
  16. <http://www.arm.linux.org.uk/>.
  17. config GENERIC_TIME
  18. bool
  19. default n
  20. config MMU
  21. bool
  22. default y
  23. config EISA
  24. bool
  25. ---help---
  26. The Extended Industry Standard Architecture (EISA) bus was
  27. developed as an open alternative to the IBM MicroChannel bus.
  28. The EISA bus provided some of the features of the IBM MicroChannel
  29. bus while maintaining backward compatibility with cards made for
  30. the older ISA bus. The EISA bus saw limited use between 1988 and
  31. 1995 when it was made obsolete by the PCI bus.
  32. Say Y here if you are building a kernel for an EISA-based machine.
  33. Otherwise, say N.
  34. config SBUS
  35. bool
  36. config MCA
  37. bool
  38. help
  39. MicroChannel Architecture is found in some IBM PS/2 machines and
  40. laptops. It is a bus system similar to PCI or ISA. See
  41. <file:Documentation/mca.txt> (and especially the web page given
  42. there) before attempting to build an MCA bus kernel.
  43. config GENERIC_HARDIRQS
  44. bool
  45. default y
  46. config TRACE_IRQFLAGS_SUPPORT
  47. bool
  48. default y
  49. config HARDIRQS_SW_RESEND
  50. bool
  51. default y
  52. config GENERIC_IRQ_PROBE
  53. bool
  54. default y
  55. config RWSEM_GENERIC_SPINLOCK
  56. bool
  57. default y
  58. config RWSEM_XCHGADD_ALGORITHM
  59. bool
  60. config GENERIC_HWEIGHT
  61. bool
  62. default y
  63. config GENERIC_CALIBRATE_DELAY
  64. bool
  65. default y
  66. config GENERIC_BUST_SPINLOCK
  67. bool
  68. config ARCH_MAY_HAVE_PC_FDC
  69. bool
  70. config GENERIC_ISA_DMA
  71. bool
  72. config FIQ
  73. bool
  74. config ARCH_MTD_XIP
  75. bool
  76. config VECTORS_BASE
  77. hex
  78. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  79. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  80. default 0x00000000
  81. help
  82. The base address of exception vectors.
  83. source "init/Kconfig"
  84. menu "System Type"
  85. choice
  86. prompt "ARM system type"
  87. default ARCH_VERSATILE
  88. config ARCH_AAEC2000
  89. bool "Agilent AAEC-2000 based"
  90. select ARM_AMBA
  91. help
  92. This enables support for systems based on the Agilent AAEC-2000
  93. config ARCH_INTEGRATOR
  94. bool "ARM Ltd. Integrator family"
  95. select ARM_AMBA
  96. select ICST525
  97. help
  98. Support for ARM's Integrator platform.
  99. config ARCH_REALVIEW
  100. bool "ARM Ltd. RealView family"
  101. select ARM_AMBA
  102. select ICST307
  103. help
  104. This enables support for ARM Ltd RealView boards.
  105. config ARCH_VERSATILE
  106. bool "ARM Ltd. Versatile family"
  107. select ARM_AMBA
  108. select ARM_VIC
  109. select ICST307
  110. help
  111. This enables support for ARM Ltd Versatile board.
  112. config ARCH_AT91
  113. bool "Atmel AT91"
  114. help
  115. This enables support for systems based on the Atmel AT91RM9200
  116. and AT91SAM9xxx processors.
  117. config ARCH_CLPS7500
  118. bool "Cirrus CL-PS7500FE"
  119. select TIMER_ACORN
  120. select ISA
  121. help
  122. Support for the Cirrus Logic PS7500FE system-on-a-chip.
  123. config ARCH_CLPS711X
  124. bool "Cirrus Logic CLPS711x/EP721x-based"
  125. help
  126. Support for Cirrus Logic 711x/721x based boards.
  127. config ARCH_CO285
  128. bool "Co-EBSA285"
  129. select FOOTBRIDGE
  130. select FOOTBRIDGE_ADDIN
  131. help
  132. Support for Intel's EBSA285 companion chip.
  133. config ARCH_EBSA110
  134. bool "EBSA-110"
  135. select ISA
  136. help
  137. This is an evaluation board for the StrongARM processor available
  138. from Digital. It has limited hardware on-board, including an
  139. Ethernet interface, two PCMCIA sockets, two serial ports and a
  140. parallel port.
  141. config ARCH_EP93XX
  142. bool "EP93xx-based"
  143. select ARM_AMBA
  144. select ARM_VIC
  145. help
  146. This enables support for the Cirrus EP93xx series of CPUs.
  147. config ARCH_FOOTBRIDGE
  148. bool "FootBridge"
  149. select FOOTBRIDGE
  150. help
  151. Support for systems based on the DC21285 companion chip
  152. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  153. config ARCH_NETX
  154. bool "Hilscher NetX based"
  155. select ARM_VIC
  156. help
  157. This enables support for systems based on the Hilscher NetX Soc
  158. config ARCH_H720X
  159. bool "Hynix HMS720x-based"
  160. select ISA_DMA_API
  161. help
  162. This enables support for systems based on the Hynix HMS720x
  163. config ARCH_IMX
  164. bool "IMX"
  165. help
  166. Support for Motorola's i.MX family of processors (MX1, MXL).
  167. config ARCH_IOP32X
  168. bool "IOP32x-based"
  169. depends on MMU
  170. select PLAT_IOP
  171. select PCI
  172. help
  173. Support for Intel's 80219 and IOP32X (XScale) family of
  174. processors.
  175. config ARCH_IOP33X
  176. bool "IOP33x-based"
  177. depends on MMU
  178. select PLAT_IOP
  179. select PCI
  180. help
  181. Support for Intel's IOP33X (XScale) family of processors.
  182. config ARCH_IXP4XX
  183. bool "IXP4xx-based"
  184. depends on MMU
  185. select GENERIC_TIME
  186. help
  187. Support for Intel's IXP4XX (XScale) family of processors.
  188. config ARCH_IXP2000
  189. bool "IXP2400/2800-based"
  190. depends on MMU
  191. select PCI
  192. help
  193. Support for Intel's IXP2400/2800 (XScale) family of processors.
  194. config ARCH_IXP23XX
  195. bool "IXP23XX-based"
  196. depends on MMU
  197. select PCI
  198. help
  199. Support for Intel's IXP23xx (XScale) family of processors.
  200. config ARCH_L7200
  201. bool "LinkUp-L7200"
  202. select FIQ
  203. help
  204. Say Y here if you intend to run this kernel on a LinkUp Systems
  205. L7200 Software Development Board which uses an ARM720T processor.
  206. Information on this board can be obtained at:
  207. <http://www.linkupsys.com/>
  208. If you have any questions or comments about the Linux kernel port
  209. to this board, send e-mail to <sjhill@cotw.com>.
  210. config ARCH_PNX4008
  211. bool "Philips Nexperia PNX4008 Mobile"
  212. help
  213. This enables support for Philips PNX4008 mobile platform.
  214. config ARCH_PXA
  215. bool "PXA2xx-based"
  216. depends on MMU
  217. select ARCH_MTD_XIP
  218. help
  219. Support for Intel's PXA2XX processor line.
  220. config ARCH_RPC
  221. bool "RiscPC"
  222. select ARCH_ACORN
  223. select FIQ
  224. select TIMER_ACORN
  225. select ARCH_MAY_HAVE_PC_FDC
  226. select ISA_DMA_API
  227. help
  228. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  229. CD-ROM interface, serial and parallel port, and the floppy drive.
  230. config ARCH_SA1100
  231. bool "SA1100-based"
  232. select ISA
  233. select ARCH_DISCONTIGMEM_ENABLE
  234. select ARCH_MTD_XIP
  235. help
  236. Support for StrongARM 11x0 based boards.
  237. config ARCH_S3C2410
  238. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
  239. help
  240. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  241. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  242. the Samsung SMDK2410 development board (and derivatives).
  243. config ARCH_SHARK
  244. bool "Shark"
  245. select ISA
  246. select ISA_DMA
  247. select PCI
  248. help
  249. Support for the StrongARM based Digital DNARD machine, also known
  250. as "Shark" (<http://www.shark-linux.de/shark.html>).
  251. config ARCH_LH7A40X
  252. bool "Sharp LH7A40X"
  253. help
  254. Say Y here for systems based on one of the Sharp LH7A40X
  255. System on a Chip processors. These CPUs include an ARM922T
  256. core with a wide array of integrated devices for
  257. hand-held and low-power applications.
  258. config ARCH_OMAP
  259. bool "TI OMAP"
  260. help
  261. Support for TI's OMAP platform (OMAP1 and OMAP2).
  262. endchoice
  263. source "arch/arm/mach-clps711x/Kconfig"
  264. source "arch/arm/mach-ep93xx/Kconfig"
  265. source "arch/arm/mach-footbridge/Kconfig"
  266. source "arch/arm/mach-integrator/Kconfig"
  267. source "arch/arm/mach-iop32x/Kconfig"
  268. source "arch/arm/mach-iop33x/Kconfig"
  269. source "arch/arm/mach-ixp4xx/Kconfig"
  270. source "arch/arm/mach-ixp2000/Kconfig"
  271. source "arch/arm/mach-ixp23xx/Kconfig"
  272. source "arch/arm/mach-pxa/Kconfig"
  273. source "arch/arm/mach-sa1100/Kconfig"
  274. source "arch/arm/plat-omap/Kconfig"
  275. source "arch/arm/mach-omap1/Kconfig"
  276. source "arch/arm/mach-omap2/Kconfig"
  277. source "arch/arm/mach-s3c2410/Kconfig"
  278. source "arch/arm/mach-lh7a40x/Kconfig"
  279. source "arch/arm/mach-imx/Kconfig"
  280. source "arch/arm/mach-h720x/Kconfig"
  281. source "arch/arm/mach-versatile/Kconfig"
  282. source "arch/arm/mach-aaec2000/Kconfig"
  283. source "arch/arm/mach-realview/Kconfig"
  284. source "arch/arm/mach-at91rm9200/Kconfig"
  285. source "arch/arm/mach-netx/Kconfig"
  286. # Definitions to make life easier
  287. config ARCH_ACORN
  288. bool
  289. config PLAT_IOP
  290. bool
  291. source arch/arm/mm/Kconfig
  292. config IWMMXT
  293. bool "Enable iWMMXt support"
  294. depends CPU_XSCALE || CPU_XSC3
  295. default y if PXA27x
  296. help
  297. Enable support for iWMMXt context switching at run time if
  298. running on a CPU that supports it.
  299. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  300. config XSCALE_PMU
  301. bool
  302. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  303. default y
  304. if !MMU
  305. source "arch/arm/Kconfig-nommu"
  306. endif
  307. endmenu
  308. source "arch/arm/common/Kconfig"
  309. config FORCE_MAX_ZONEORDER
  310. int
  311. depends on SA1111
  312. default "9"
  313. menu "Bus support"
  314. config ARM_AMBA
  315. bool
  316. config ISA
  317. bool
  318. help
  319. Find out whether you have ISA slots on your motherboard. ISA is the
  320. name of a bus system, i.e. the way the CPU talks to the other stuff
  321. inside your box. Other bus systems are PCI, EISA, MicroChannel
  322. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  323. newer boards don't support it. If you have ISA, say Y, otherwise N.
  324. # Select ISA DMA controller support
  325. config ISA_DMA
  326. bool
  327. select ISA_DMA_API
  328. # Select ISA DMA interface
  329. config ISA_DMA_API
  330. bool
  331. config PCI
  332. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
  333. help
  334. Find out whether you have a PCI motherboard. PCI is the name of a
  335. bus system, i.e. the way the CPU talks to the other stuff inside
  336. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  337. VESA. If you have PCI, say Y, otherwise N.
  338. The PCI-HOWTO, available from
  339. <http://www.tldp.org/docs.html#howto>, contains valuable
  340. information about which PCI hardware does work under Linux and which
  341. doesn't.
  342. # Select the host bridge type
  343. config PCI_HOST_VIA82C505
  344. bool
  345. depends on PCI && ARCH_SHARK
  346. default y
  347. source "drivers/pci/Kconfig"
  348. source "drivers/pcmcia/Kconfig"
  349. endmenu
  350. menu "Kernel Features"
  351. config SMP
  352. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  353. depends on EXPERIMENTAL && REALVIEW_MPCORE
  354. help
  355. This enables support for systems with more than one CPU. If you have
  356. a system with only one CPU, like most personal computers, say N. If
  357. you have a system with more than one CPU, say Y.
  358. If you say N here, the kernel will run on single and multiprocessor
  359. machines, but will use only one CPU of a multiprocessor machine. If
  360. you say Y here, the kernel will run on many, but not all, single
  361. processor machines. On a single processor machine, the kernel will
  362. run faster if you say N here.
  363. See also the <file:Documentation/smp.txt>,
  364. <file:Documentation/i386/IO-APIC.txt>,
  365. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  366. <http://www.linuxdoc.org/docs.html#howto>.
  367. If you don't know what to do here, say N.
  368. config NR_CPUS
  369. int "Maximum number of CPUs (2-32)"
  370. range 2 32
  371. depends on SMP
  372. default "4"
  373. config HOTPLUG_CPU
  374. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  375. depends on SMP && HOTPLUG && EXPERIMENTAL
  376. help
  377. Say Y here to experiment with turning CPUs off and on. CPUs
  378. can be controlled through /sys/devices/system/cpu.
  379. config LOCAL_TIMERS
  380. bool "Use local timer interrupts"
  381. depends on SMP && REALVIEW_MPCORE
  382. default y
  383. help
  384. Enable support for local timers on SMP platforms, rather then the
  385. legacy IPI broadcast method. Local timers allows the system
  386. accounting to be spread across the timer interval, preventing a
  387. "thundering herd" at every timer tick.
  388. config PREEMPT
  389. bool "Preemptible Kernel (EXPERIMENTAL)"
  390. depends on EXPERIMENTAL
  391. help
  392. This option reduces the latency of the kernel when reacting to
  393. real-time or interactive events by allowing a low priority process to
  394. be preempted even if it is in kernel mode executing a system call.
  395. This allows applications to run more reliably even when the system is
  396. under load.
  397. Say Y here if you are building a kernel for a desktop, embedded
  398. or real-time system. Say N if you are unsure.
  399. config NO_IDLE_HZ
  400. bool "Dynamic tick timer"
  401. help
  402. Select this option if you want to disable continuous timer ticks
  403. and have them programmed to occur as required. This option saves
  404. power as the system can remain in idle state for longer.
  405. By default dynamic tick is disabled during the boot, and can be
  406. manually enabled with:
  407. echo 1 > /sys/devices/system/timer/timer0/dyn_tick
  408. Alternatively, if you want dynamic tick automatically enabled
  409. during boot, pass "dyntick=enable" via the kernel command string.
  410. Please note that dynamic tick may affect the accuracy of
  411. timekeeping on some platforms depending on the implementation.
  412. Currently at least OMAP, PXA2xx and SA11x0 platforms are known
  413. to have accurate timekeeping with dynamic tick.
  414. config HZ
  415. int
  416. default 128 if ARCH_L7200
  417. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  418. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  419. default 100
  420. config AEABI
  421. bool "Use the ARM EABI to compile the kernel"
  422. help
  423. This option allows for the kernel to be compiled using the latest
  424. ARM ABI (aka EABI). This is only useful if you are using a user
  425. space environment that is also compiled with EABI.
  426. Since there are major incompatibilities between the legacy ABI and
  427. EABI, especially with regard to structure member alignment, this
  428. option also changes the kernel syscall calling convention to
  429. disambiguate both ABIs and allow for backward compatibility support
  430. (selected with CONFIG_OABI_COMPAT).
  431. To use this you need GCC version 4.0.0 or later.
  432. config OABI_COMPAT
  433. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  434. depends on AEABI && EXPERIMENTAL
  435. default y
  436. help
  437. This option preserves the old syscall interface along with the
  438. new (ARM EABI) one. It also provides a compatibility layer to
  439. intercept syscalls that have structure arguments which layout
  440. in memory differs between the legacy ABI and the new ARM EABI
  441. (only for non "thumb" binaries). This option adds a tiny
  442. overhead to all syscalls and produces a slightly larger kernel.
  443. If you know you'll be using only pure EABI user space then you
  444. can say N here. If this option is not selected and you attempt
  445. to execute a legacy ABI binary then the result will be
  446. UNPREDICTABLE (in fact it can be predicted that it won't work
  447. at all). If in doubt say Y.
  448. config ARCH_DISCONTIGMEM_ENABLE
  449. bool
  450. default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
  451. help
  452. Say Y to support efficient handling of discontiguous physical memory,
  453. for architectures which are either NUMA (Non-Uniform Memory Access)
  454. or have huge holes in the physical address space for other reasons.
  455. See <file:Documentation/vm/numa> for more.
  456. config NODES_SHIFT
  457. int
  458. default "4" if ARCH_LH7A40X
  459. default "2"
  460. depends on NEED_MULTIPLE_NODES
  461. source "mm/Kconfig"
  462. config LEDS
  463. bool "Timer and CPU usage LEDs"
  464. depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
  465. ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
  466. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  467. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  468. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  469. ARCH_AT91RM9200 || MACH_TRIZEPS4
  470. help
  471. If you say Y here, the LEDs on your machine will be used
  472. to provide useful information about your current system status.
  473. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  474. be able to select which LEDs are active using the options below. If
  475. you are compiling a kernel for the EBSA-110 or the LART however, the
  476. red LED will simply flash regularly to indicate that the system is
  477. still functional. It is safe to say Y here if you have a CATS
  478. system, but the driver will do nothing.
  479. config LEDS_TIMER
  480. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  481. MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  482. depends on LEDS
  483. default y if ARCH_EBSA110
  484. help
  485. If you say Y here, one of the system LEDs (the green one on the
  486. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  487. will flash regularly to indicate that the system is still
  488. operational. This is mainly useful to kernel hackers who are
  489. debugging unstable kernels.
  490. The LART uses the same LED for both Timer LED and CPU usage LED
  491. functions. You may choose to use both, but the Timer LED function
  492. will overrule the CPU usage LED.
  493. config LEDS_CPU
  494. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  495. !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
  496. depends on LEDS
  497. help
  498. If you say Y here, the red LED will be used to give a good real
  499. time indication of CPU usage, by lighting whenever the idle task
  500. is not currently executing.
  501. The LART uses the same LED for both Timer LED and CPU usage LED
  502. functions. You may choose to use both, but the Timer LED function
  503. will overrule the CPU usage LED.
  504. config ALIGNMENT_TRAP
  505. bool
  506. depends on CPU_CP15_MMU
  507. default y if !ARCH_EBSA110
  508. help
  509. ARM processors cannot fetch/store information which is not
  510. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  511. address divisible by 4. On 32-bit ARM processors, these non-aligned
  512. fetch/store instructions will be emulated in software if you say
  513. here, which has a severe performance impact. This is necessary for
  514. correct operation of some network protocols. With an IP-only
  515. configuration it is safe to say N, otherwise say Y.
  516. endmenu
  517. menu "Boot options"
  518. # Compressed boot loader in ROM. Yes, we really want to ask about
  519. # TEXT and BSS so we preserve their values in the config files.
  520. config ZBOOT_ROM_TEXT
  521. hex "Compressed ROM boot loader base address"
  522. default "0"
  523. help
  524. The physical address at which the ROM-able zImage is to be
  525. placed in the target. Platforms which normally make use of
  526. ROM-able zImage formats normally set this to a suitable
  527. value in their defconfig file.
  528. If ZBOOT_ROM is not enabled, this has no effect.
  529. config ZBOOT_ROM_BSS
  530. hex "Compressed ROM boot loader BSS address"
  531. default "0"
  532. help
  533. The base address of an area of read/write memory in the target
  534. for the ROM-able zImage which must be available while the
  535. decompressor is running. It must be large enough to hold the
  536. entire decompressed kernel plus an additional 128 KiB.
  537. Platforms which normally make use of ROM-able zImage formats
  538. normally set this to a suitable value in their defconfig file.
  539. If ZBOOT_ROM is not enabled, this has no effect.
  540. config ZBOOT_ROM
  541. bool "Compressed boot loader in ROM/flash"
  542. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  543. help
  544. Say Y here if you intend to execute your compressed kernel image
  545. (zImage) directly from ROM or flash. If unsure, say N.
  546. config CMDLINE
  547. string "Default kernel command string"
  548. default ""
  549. help
  550. On some architectures (EBSA110 and CATS), there is currently no way
  551. for the boot loader to pass arguments to the kernel. For these
  552. architectures, you should supply some command-line options at build
  553. time by entering them here. As a minimum, you should specify the
  554. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  555. config XIP_KERNEL
  556. bool "Kernel Execute-In-Place from ROM"
  557. depends on !ZBOOT_ROM
  558. help
  559. Execute-In-Place allows the kernel to run from non-volatile storage
  560. directly addressable by the CPU, such as NOR flash. This saves RAM
  561. space since the text section of the kernel is not loaded from flash
  562. to RAM. Read-write sections, such as the data section and stack,
  563. are still copied to RAM. The XIP kernel is not compressed since
  564. it has to run directly from flash, so it will take more space to
  565. store it. The flash address used to link the kernel object files,
  566. and for storing it, is configuration dependent. Therefore, if you
  567. say Y here, you must know the proper physical address where to
  568. store the kernel image depending on your own flash memory usage.
  569. Also note that the make target becomes "make xipImage" rather than
  570. "make zImage" or "make Image". The final kernel binary to put in
  571. ROM memory will be arch/arm/boot/xipImage.
  572. If unsure, say N.
  573. config XIP_PHYS_ADDR
  574. hex "XIP Kernel Physical Location"
  575. depends on XIP_KERNEL
  576. default "0x00080000"
  577. help
  578. This is the physical address in your flash memory the kernel will
  579. be linked for and stored to. This address is dependent on your
  580. own flash usage.
  581. endmenu
  582. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP)
  583. menu "CPU Frequency scaling"
  584. source "drivers/cpufreq/Kconfig"
  585. config CPU_FREQ_SA1100
  586. bool
  587. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  588. default y
  589. config CPU_FREQ_SA1110
  590. bool
  591. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  592. default y
  593. config CPU_FREQ_INTEGRATOR
  594. tristate "CPUfreq driver for ARM Integrator CPUs"
  595. depends on ARCH_INTEGRATOR && CPU_FREQ
  596. default y
  597. help
  598. This enables the CPUfreq driver for ARM Integrator CPUs.
  599. For details, take a look at <file:Documentation/cpu-freq>.
  600. If in doubt, say Y.
  601. endmenu
  602. endif
  603. menu "Floating point emulation"
  604. comment "At least one emulation must be selected"
  605. config FPE_NWFPE
  606. bool "NWFPE math emulation"
  607. depends on !AEABI || OABI_COMPAT
  608. ---help---
  609. Say Y to include the NWFPE floating point emulator in the kernel.
  610. This is necessary to run most binaries. Linux does not currently
  611. support floating point hardware so you need to say Y here even if
  612. your machine has an FPA or floating point co-processor podule.
  613. You may say N here if you are going to load the Acorn FPEmulator
  614. early in the bootup.
  615. config FPE_NWFPE_XP
  616. bool "Support extended precision"
  617. depends on FPE_NWFPE
  618. help
  619. Say Y to include 80-bit support in the kernel floating-point
  620. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  621. Note that gcc does not generate 80-bit operations by default,
  622. so in most cases this option only enlarges the size of the
  623. floating point emulator without any good reason.
  624. You almost surely want to say N here.
  625. config FPE_FASTFPE
  626. bool "FastFPE math emulation (EXPERIMENTAL)"
  627. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  628. ---help---
  629. Say Y here to include the FAST floating point emulator in the kernel.
  630. This is an experimental much faster emulator which now also has full
  631. precision for the mantissa. It does not support any exceptions.
  632. It is very simple, and approximately 3-6 times faster than NWFPE.
  633. It should be sufficient for most programs. It may be not suitable
  634. for scientific calculations, but you have to check this for yourself.
  635. If you do not feel you need a faster FP emulation you should better
  636. choose NWFPE.
  637. config VFP
  638. bool "VFP-format floating point maths"
  639. depends on CPU_V6 || CPU_ARM926T
  640. help
  641. Say Y to include VFP support code in the kernel. This is needed
  642. if your hardware includes a VFP unit.
  643. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  644. release notes and additional status information.
  645. Say N if your target does not have VFP hardware.
  646. endmenu
  647. menu "Userspace binary formats"
  648. source "fs/Kconfig.binfmt"
  649. config ARTHUR
  650. tristate "RISC OS personality"
  651. depends on !AEABI
  652. help
  653. Say Y here to include the kernel code necessary if you want to run
  654. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  655. experimental; if this sounds frightening, say N and sleep in peace.
  656. You can also say M here to compile this support as a module (which
  657. will be called arthur).
  658. endmenu
  659. menu "Power management options"
  660. source "kernel/power/Kconfig"
  661. config APM
  662. tristate "Advanced Power Management Emulation"
  663. ---help---
  664. APM is a BIOS specification for saving power using several different
  665. techniques. This is mostly useful for battery powered laptops with
  666. APM compliant BIOSes. If you say Y here, the system time will be
  667. reset after a RESUME operation, the /proc/apm device will provide
  668. battery status information, and user-space programs will receive
  669. notification of APM "events" (e.g. battery status change).
  670. In order to use APM, you will need supporting software. For location
  671. and more information, read <file:Documentation/pm.txt> and the
  672. Battery Powered Linux mini-HOWTO, available from
  673. <http://www.tldp.org/docs.html#howto>.
  674. This driver does not spin down disk drives (see the hdparm(8)
  675. manpage ("man 8 hdparm") for that), and it doesn't turn off
  676. VESA-compliant "green" monitors.
  677. Generally, if you don't have a battery in your machine, there isn't
  678. much point in using this driver and you should say N. If you get
  679. random kernel OOPSes or reboots that don't seem to be related to
  680. anything, try disabling/enabling this option (or disabling/enabling
  681. APM in your BIOS).
  682. endmenu
  683. source "net/Kconfig"
  684. menu "Device Drivers"
  685. source "drivers/base/Kconfig"
  686. source "drivers/connector/Kconfig"
  687. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  688. source "drivers/mtd/Kconfig"
  689. endif
  690. source "drivers/parport/Kconfig"
  691. source "drivers/pnp/Kconfig"
  692. source "drivers/block/Kconfig"
  693. source "drivers/acorn/block/Kconfig"
  694. if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
  695. || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
  696. || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
  697. || ARCH_IXP23XX
  698. source "drivers/ide/Kconfig"
  699. endif
  700. source "drivers/scsi/Kconfig"
  701. source "drivers/ata/Kconfig"
  702. source "drivers/md/Kconfig"
  703. source "drivers/message/fusion/Kconfig"
  704. source "drivers/ieee1394/Kconfig"
  705. source "drivers/message/i2o/Kconfig"
  706. source "drivers/net/Kconfig"
  707. source "drivers/isdn/Kconfig"
  708. # input before char - char/joystick depends on it. As does USB.
  709. source "drivers/input/Kconfig"
  710. source "drivers/char/Kconfig"
  711. source "drivers/i2c/Kconfig"
  712. source "drivers/spi/Kconfig"
  713. source "drivers/w1/Kconfig"
  714. source "drivers/hwmon/Kconfig"
  715. #source "drivers/l3/Kconfig"
  716. source "drivers/misc/Kconfig"
  717. source "drivers/mfd/Kconfig"
  718. source "drivers/leds/Kconfig"
  719. source "drivers/media/Kconfig"
  720. source "drivers/video/Kconfig"
  721. source "sound/Kconfig"
  722. source "drivers/usb/Kconfig"
  723. source "drivers/mmc/Kconfig"
  724. source "drivers/rtc/Kconfig"
  725. endmenu
  726. source "fs/Kconfig"
  727. source "arch/arm/oprofile/Kconfig"
  728. source "arch/arm/Kconfig.debug"
  729. source "security/Kconfig"
  730. source "crypto/Kconfig"
  731. source "lib/Kconfig"