11da177e4SLinus Torvalds# 21da177e4SLinus Torvalds# For a description of the syntax of this configuration file, 31da177e4SLinus Torvalds# see Documentation/kbuild/kconfig-language.txt. 41da177e4SLinus Torvalds# 51da177e4SLinus Torvalds 61da177e4SLinus Torvaldsmainmenu "Linux Kernel Configuration" 71da177e4SLinus Torvalds 81da177e4SLinus Torvaldsconfig ARM 91da177e4SLinus Torvalds bool 101da177e4SLinus Torvalds default y 1112b824fbSAlessandro Zummo select RTC_LIB 121da177e4SLinus Torvalds help 131da177e4SLinus Torvalds The ARM series is a line of low-power-consumption RISC chip designs 14f6c8965aSMartin Michlmayr licensed by ARM Ltd and targeted at embedded applications and 151da177e4SLinus Torvalds handhelds such as the Compaq IPAQ. ARM-based PCs are no longer 161da177e4SLinus Torvalds manufactured, but legacy ARM-based PC hardware remains popular in 171da177e4SLinus Torvalds Europe. There is an ARM Linux project with a web page at 181da177e4SLinus Torvalds <http://www.arm.linux.org.uk/>. 191da177e4SLinus Torvalds 201da177e4SLinus Torvaldsconfig MMU 211da177e4SLinus Torvalds bool 221da177e4SLinus Torvalds default y 231da177e4SLinus Torvalds 241da177e4SLinus Torvaldsconfig EISA 251da177e4SLinus Torvalds bool 261da177e4SLinus Torvalds ---help--- 271da177e4SLinus Torvalds The Extended Industry Standard Architecture (EISA) bus was 281da177e4SLinus Torvalds developed as an open alternative to the IBM MicroChannel bus. 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds The EISA bus provided some of the features of the IBM MicroChannel 311da177e4SLinus Torvalds bus while maintaining backward compatibility with cards made for 321da177e4SLinus Torvalds the older ISA bus. The EISA bus saw limited use between 1988 and 331da177e4SLinus Torvalds 1995 when it was made obsolete by the PCI bus. 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds Say Y here if you are building a kernel for an EISA-based machine. 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds Otherwise, say N. 381da177e4SLinus Torvalds 391da177e4SLinus Torvaldsconfig SBUS 401da177e4SLinus Torvalds bool 411da177e4SLinus Torvalds 421da177e4SLinus Torvaldsconfig MCA 431da177e4SLinus Torvalds bool 441da177e4SLinus Torvalds help 451da177e4SLinus Torvalds MicroChannel Architecture is found in some IBM PS/2 machines and 461da177e4SLinus Torvalds laptops. It is a bus system similar to PCI or ISA. See 471da177e4SLinus Torvalds <file:Documentation/mca.txt> (and especially the web page given 481da177e4SLinus Torvalds there) before attempting to build an MCA bus kernel. 491da177e4SLinus Torvalds 50*4a2581a0SThomas Gleixnerconfig GENERIC_HARDIRQS 51*4a2581a0SThomas Gleixner bool 52*4a2581a0SThomas Gleixner default y 53*4a2581a0SThomas Gleixner 54*4a2581a0SThomas Gleixnerconfig HARDIRQS_SW_RESEND 55*4a2581a0SThomas Gleixner bool 56*4a2581a0SThomas Gleixner default y 57*4a2581a0SThomas Gleixner 58*4a2581a0SThomas Gleixnerconfig GENERIC_IRQ_PROBE 59*4a2581a0SThomas Gleixner bool 60*4a2581a0SThomas Gleixner default y 61*4a2581a0SThomas Gleixner 621da177e4SLinus Torvaldsconfig RWSEM_GENERIC_SPINLOCK 631da177e4SLinus Torvalds bool 641da177e4SLinus Torvalds default y 651da177e4SLinus Torvalds 661da177e4SLinus Torvaldsconfig RWSEM_XCHGADD_ALGORITHM 671da177e4SLinus Torvalds bool 681da177e4SLinus Torvalds 69b89c3b16SAkinobu Mitaconfig GENERIC_HWEIGHT 70b89c3b16SAkinobu Mita bool 71b89c3b16SAkinobu Mita default y 72b89c3b16SAkinobu Mita 731da177e4SLinus Torvaldsconfig GENERIC_CALIBRATE_DELAY 741da177e4SLinus Torvalds bool 751da177e4SLinus Torvalds default y 761da177e4SLinus Torvalds 771da177e4SLinus Torvaldsconfig GENERIC_BUST_SPINLOCK 781da177e4SLinus Torvalds bool 791da177e4SLinus Torvalds 80a08b6b79Sviro@ZenIV.linux.org.ukconfig ARCH_MAY_HAVE_PC_FDC 81a08b6b79Sviro@ZenIV.linux.org.uk bool 82a08b6b79Sviro@ZenIV.linux.org.uk 831da177e4SLinus Torvaldsconfig GENERIC_ISA_DMA 841da177e4SLinus Torvalds bool 851da177e4SLinus Torvalds 861da177e4SLinus Torvaldsconfig FIQ 871da177e4SLinus Torvalds bool 881da177e4SLinus Torvalds 89034d2f5aSAl Viroconfig ARCH_MTD_XIP 90034d2f5aSAl Viro bool 91034d2f5aSAl Viro 92c760fc19SHyok S. Choiconfig VECTORS_BASE 93c760fc19SHyok S. Choi hex 94c760fc19SHyok S. Choi default 0xffff0000 if MMU 95c760fc19SHyok S. Choi default DRAM_BASE if REMAP_VECTORS_TO_RAM 96c760fc19SHyok S. Choi default 0x00000000 97c760fc19SHyok S. Choi help 98c760fc19SHyok S. Choi The base address of exception vectors. 99c760fc19SHyok S. Choi 1001da177e4SLinus Torvaldssource "init/Kconfig" 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvaldsmenu "System Type" 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvaldschoice 1051da177e4SLinus Torvalds prompt "ARM system type" 1066a0e2430SCatalin Marinas default ARCH_VERSATILE 1071da177e4SLinus Torvalds 1084af6fee1SDeepak Saxenaconfig ARCH_AAEC2000 1094af6fee1SDeepak Saxena bool "Agilent AAEC-2000 based" 1104af6fee1SDeepak Saxena select ARM_AMBA 1114af6fee1SDeepak Saxena help 1124af6fee1SDeepak Saxena This enables support for systems based on the Agilent AAEC-2000 1134af6fee1SDeepak Saxena 1144af6fee1SDeepak Saxenaconfig ARCH_INTEGRATOR 1154af6fee1SDeepak Saxena bool "ARM Ltd. Integrator family" 1164af6fee1SDeepak Saxena select ARM_AMBA 1174af6fee1SDeepak Saxena select ICST525 1184af6fee1SDeepak Saxena help 1194af6fee1SDeepak Saxena Support for ARM's Integrator platform. 1204af6fee1SDeepak Saxena 1214af6fee1SDeepak Saxenaconfig ARCH_REALVIEW 1224af6fee1SDeepak Saxena bool "ARM Ltd. RealView family" 1234af6fee1SDeepak Saxena select ARM_AMBA 1244af6fee1SDeepak Saxena select ICST307 1254af6fee1SDeepak Saxena help 1264af6fee1SDeepak Saxena This enables support for ARM Ltd RealView boards. 1274af6fee1SDeepak Saxena 1284af6fee1SDeepak Saxenaconfig ARCH_VERSATILE 1294af6fee1SDeepak Saxena bool "ARM Ltd. Versatile family" 1304af6fee1SDeepak Saxena select ARM_AMBA 1314af6fee1SDeepak Saxena select ARM_VIC 1324af6fee1SDeepak Saxena select ICST307 1334af6fee1SDeepak Saxena help 1344af6fee1SDeepak Saxena This enables support for ARM Ltd Versatile board. 1354af6fee1SDeepak Saxena 1364af6fee1SDeepak Saxenaconfig ARCH_AT91RM9200 1374af6fee1SDeepak Saxena bool "Atmel AT91RM9200" 1384af6fee1SDeepak Saxena help 1394af6fee1SDeepak Saxena Say Y here if you intend to run this kernel on an Atmel 1404af6fee1SDeepak Saxena AT91RM9200-based board. 1414af6fee1SDeepak Saxena 1421da177e4SLinus Torvaldsconfig ARCH_CLPS7500 1434af6fee1SDeepak Saxena bool "Cirrus CL-PS7500FE" 1441da177e4SLinus Torvalds select TIMER_ACORN 145f7e68bbfSRussell King select ISA 146f999b8bdSMartin Michlmayr help 147f999b8bdSMartin Michlmayr Support for the Cirrus Logic PS7500FE system-on-a-chip. 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvaldsconfig ARCH_CLPS711X 1504af6fee1SDeepak Saxena bool "Cirrus Logic CLPS711x/EP721x-based" 151f999b8bdSMartin Michlmayr help 152f999b8bdSMartin Michlmayr Support for Cirrus Logic 711x/721x based boards. 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvaldsconfig ARCH_CO285 1551da177e4SLinus Torvalds bool "Co-EBSA285" 1561da177e4SLinus Torvalds select FOOTBRIDGE 1571da177e4SLinus Torvalds select FOOTBRIDGE_ADDIN 158f999b8bdSMartin Michlmayr help 159f999b8bdSMartin Michlmayr Support for Intel's EBSA285 companion chip. 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvaldsconfig ARCH_EBSA110 1621da177e4SLinus Torvalds bool "EBSA-110" 163f7e68bbfSRussell King select ISA 1641da177e4SLinus Torvalds help 1651da177e4SLinus Torvalds This is an evaluation board for the StrongARM processor available 166f6c8965aSMartin Michlmayr from Digital. It has limited hardware on-board, including an 1671da177e4SLinus Torvalds Ethernet interface, two PCMCIA sockets, two serial ports and a 1681da177e4SLinus Torvalds parallel port. 1691da177e4SLinus Torvalds 170e7736d47SLennert Buytenhekconfig ARCH_EP93XX 171e7736d47SLennert Buytenhek bool "EP93xx-based" 172e7736d47SLennert Buytenhek select ARM_AMBA 173e7736d47SLennert Buytenhek select ARM_VIC 174e7736d47SLennert Buytenhek help 175e7736d47SLennert Buytenhek This enables support for the Cirrus EP93xx series of CPUs. 176e7736d47SLennert Buytenhek 1771da177e4SLinus Torvaldsconfig ARCH_FOOTBRIDGE 1781da177e4SLinus Torvalds bool "FootBridge" 1791da177e4SLinus Torvalds select FOOTBRIDGE 180f999b8bdSMartin Michlmayr help 181f999b8bdSMartin Michlmayr Support for systems based on the DC21285 companion chip 182f999b8bdSMartin Michlmayr ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. 1831da177e4SLinus Torvalds 1844af6fee1SDeepak Saxenaconfig ARCH_NETX 1854af6fee1SDeepak Saxena bool "Hilscher NetX based" 1864af6fee1SDeepak Saxena select ARM_VIC 187f999b8bdSMartin Michlmayr help 1884af6fee1SDeepak Saxena This enables support for systems based on the Hilscher NetX Soc 1894af6fee1SDeepak Saxena 1904af6fee1SDeepak Saxenaconfig ARCH_H720X 1914af6fee1SDeepak Saxena bool "Hynix HMS720x-based" 1924af6fee1SDeepak Saxena select ISA_DMA_API 1934af6fee1SDeepak Saxena help 1944af6fee1SDeepak Saxena This enables support for systems based on the Hynix HMS720x 1954af6fee1SDeepak Saxena 1964af6fee1SDeepak Saxenaconfig ARCH_IMX 1974af6fee1SDeepak Saxena bool "IMX" 1984af6fee1SDeepak Saxena help 1994af6fee1SDeepak Saxena Support for Motorola's i.MX family of processors (MX1, MXL). 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvaldsconfig ARCH_IOP3XX 2021da177e4SLinus Torvalds bool "IOP3xx-based" 203a4f7e763SRussell King depends on MMU 204f7e68bbfSRussell King select PCI 205f999b8bdSMartin Michlmayr help 206f999b8bdSMartin Michlmayr Support for Intel's IOP3XX (XScale) family of processors. 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvaldsconfig ARCH_IXP4XX 2091da177e4SLinus Torvalds bool "IXP4xx-based" 210a4f7e763SRussell King depends on MMU 211f999b8bdSMartin Michlmayr help 212f999b8bdSMartin Michlmayr Support for Intel's IXP4XX (XScale) family of processors. 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvaldsconfig ARCH_IXP2000 2151da177e4SLinus Torvalds bool "IXP2400/2800-based" 216a4f7e763SRussell King depends on MMU 217f7e68bbfSRussell King select PCI 218f999b8bdSMartin Michlmayr help 219f999b8bdSMartin Michlmayr Support for Intel's IXP2400/2800 (XScale) family of processors. 2201da177e4SLinus Torvalds 221c4713074SLennert Buytenhekconfig ARCH_IXP23XX 222c4713074SLennert Buytenhek bool "IXP23XX-based" 223a4f7e763SRussell King depends on MMU 224c4713074SLennert Buytenhek select PCI 225c4713074SLennert Buytenhek help 226c4713074SLennert Buytenhek Support for Intel's IXP23xx (XScale) family of processors. 227c4713074SLennert Buytenhek 2281da177e4SLinus Torvaldsconfig ARCH_L7200 2291da177e4SLinus Torvalds bool "LinkUp-L7200" 2301da177e4SLinus Torvalds select FIQ 2311da177e4SLinus Torvalds help 2321da177e4SLinus Torvalds Say Y here if you intend to run this kernel on a LinkUp Systems 2331da177e4SLinus Torvalds L7200 Software Development Board which uses an ARM720T processor. 2341da177e4SLinus Torvalds Information on this board can be obtained at: 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds <http://www.linkupsys.com/> 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds If you have any questions or comments about the Linux kernel port 2391da177e4SLinus Torvalds to this board, send e-mail to <sjhill@cotw.com>. 2401da177e4SLinus Torvalds 2414af6fee1SDeepak Saxenaconfig ARCH_PNX4008 2424af6fee1SDeepak Saxena bool "Philips Nexperia PNX4008 Mobile" 2434af6fee1SDeepak Saxena help 2444af6fee1SDeepak Saxena This enables support for Philips PNX4008 mobile platform. 2454af6fee1SDeepak Saxena 2461da177e4SLinus Torvaldsconfig ARCH_PXA 2471da177e4SLinus Torvalds bool "PXA2xx-based" 248a4f7e763SRussell King depends on MMU 249034d2f5aSAl Viro select ARCH_MTD_XIP 250f999b8bdSMartin Michlmayr help 251f999b8bdSMartin Michlmayr Support for Intel's PXA2XX processor line. 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvaldsconfig ARCH_RPC 2541da177e4SLinus Torvalds bool "RiscPC" 2551da177e4SLinus Torvalds select ARCH_ACORN 2561da177e4SLinus Torvalds select FIQ 2571da177e4SLinus Torvalds select TIMER_ACORN 258a08b6b79Sviro@ZenIV.linux.org.uk select ARCH_MAY_HAVE_PC_FDC 259065909b9SRussell King select ISA_DMA_API 2601da177e4SLinus Torvalds help 2611da177e4SLinus Torvalds On the Acorn Risc-PC, Linux can support the internal IDE disk and 2621da177e4SLinus Torvalds CD-ROM interface, serial and parallel port, and the floppy drive. 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvaldsconfig ARCH_SA1100 2651da177e4SLinus Torvalds bool "SA1100-based" 266f7e68bbfSRussell King select ISA 2673cd9e19eSRussell King select ARCH_DISCONTIGMEM_ENABLE 268034d2f5aSAl Viro select ARCH_MTD_XIP 269f999b8bdSMartin Michlmayr help 270f999b8bdSMartin Michlmayr Support for StrongARM 11x0 based boards. 2711da177e4SLinus Torvalds 2721da177e4SLinus Torvaldsconfig ARCH_S3C2410 273cd701aa2SBen Dooks bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442" 2741da177e4SLinus Torvalds help 2751da177e4SLinus Torvalds Samsung S3C2410X CPU based systems, such as the Simtec Electronics 2761da177e4SLinus Torvalds BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or 277f6c8965aSMartin Michlmayr the Samsung SMDK2410 development board (and derivatives). 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvaldsconfig ARCH_SHARK 2801da177e4SLinus Torvalds bool "Shark" 281f7e68bbfSRussell King select ISA 282f7e68bbfSRussell King select ISA_DMA 283f7e68bbfSRussell King select PCI 284f999b8bdSMartin Michlmayr help 285f999b8bdSMartin Michlmayr Support for the StrongARM based Digital DNARD machine, also known 286f999b8bdSMartin Michlmayr as "Shark" (<http://www.shark-linux.de/shark.html>). 2871da177e4SLinus Torvalds 2881da177e4SLinus Torvaldsconfig ARCH_LH7A40X 2891da177e4SLinus Torvalds bool "Sharp LH7A40X" 2901da177e4SLinus Torvalds help 2911da177e4SLinus Torvalds Say Y here for systems based on one of the Sharp LH7A40X 2921da177e4SLinus Torvalds System on a Chip processors. These CPUs include an ARM922T 2931da177e4SLinus Torvalds core with a wide array of integrated devices for 2941da177e4SLinus Torvalds hand-held and low-power applications. 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvaldsconfig ARCH_OMAP 2971da177e4SLinus Torvalds bool "TI OMAP" 298f999b8bdSMartin Michlmayr help 299f999b8bdSMartin Michlmayr Support for TI's OMAP platform (OMAP1 and OMAP2). 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvaldsendchoice 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvaldssource "arch/arm/mach-clps711x/Kconfig" 3041da177e4SLinus Torvalds 305e7736d47SLennert Buytenheksource "arch/arm/mach-ep93xx/Kconfig" 306e7736d47SLennert Buytenhek 3071da177e4SLinus Torvaldssource "arch/arm/mach-footbridge/Kconfig" 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvaldssource "arch/arm/mach-integrator/Kconfig" 3101da177e4SLinus Torvalds 3111da177e4SLinus Torvaldssource "arch/arm/mach-iop3xx/Kconfig" 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvaldssource "arch/arm/mach-ixp4xx/Kconfig" 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvaldssource "arch/arm/mach-ixp2000/Kconfig" 3161da177e4SLinus Torvalds 317c4713074SLennert Buytenheksource "arch/arm/mach-ixp23xx/Kconfig" 318c4713074SLennert Buytenhek 3191da177e4SLinus Torvaldssource "arch/arm/mach-pxa/Kconfig" 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvaldssource "arch/arm/mach-sa1100/Kconfig" 3221da177e4SLinus Torvalds 323d48af15eSTony Lindgrensource "arch/arm/plat-omap/Kconfig" 324d48af15eSTony Lindgren 325d48af15eSTony Lindgrensource "arch/arm/mach-omap1/Kconfig" 3261da177e4SLinus Torvalds 3271dbae815STony Lindgrensource "arch/arm/mach-omap2/Kconfig" 3281dbae815STony Lindgren 3291da177e4SLinus Torvaldssource "arch/arm/mach-s3c2410/Kconfig" 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvaldssource "arch/arm/mach-lh7a40x/Kconfig" 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvaldssource "arch/arm/mach-imx/Kconfig" 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvaldssource "arch/arm/mach-h720x/Kconfig" 3361da177e4SLinus Torvalds 3371da177e4SLinus Torvaldssource "arch/arm/mach-versatile/Kconfig" 3381da177e4SLinus Torvalds 339038c5b60SBellido Nicolassource "arch/arm/mach-aaec2000/Kconfig" 340038c5b60SBellido Nicolas 3418ad68bbfSCatalin Marinassource "arch/arm/mach-realview/Kconfig" 3428ad68bbfSCatalin Marinas 34373a59c1cSSAN Peoplesource "arch/arm/mach-at91rm9200/Kconfig" 34473a59c1cSSAN People 345bb6d8c88SSascha Hauersource "arch/arm/mach-netx/Kconfig" 346bb6d8c88SSascha Hauer 3471da177e4SLinus Torvalds# Definitions to make life easier 3481da177e4SLinus Torvaldsconfig ARCH_ACORN 3491da177e4SLinus Torvalds bool 3501da177e4SLinus Torvalds 3511da177e4SLinus Torvaldssource arch/arm/mm/Kconfig 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER 3541da177e4SLinus Torvaldsconfig XSCALE_PMU 3551da177e4SLinus Torvalds bool 3561da177e4SLinus Torvalds depends on CPU_XSCALE && !XSCALE_PMU_TIMER 3571da177e4SLinus Torvalds default y 3581da177e4SLinus Torvalds 3593b93e7b0SHyok S. Choiif !MMU 3603b93e7b0SHyok S. Choisource "arch/arm/Kconfig-nommu" 3613b93e7b0SHyok S. Choiendif 3623b93e7b0SHyok S. Choi 3631da177e4SLinus Torvaldsendmenu 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvaldssource "arch/arm/common/Kconfig" 3661da177e4SLinus Torvalds 3671da177e4SLinus Torvaldsconfig FORCE_MAX_ZONEORDER 3681da177e4SLinus Torvalds int 3691da177e4SLinus Torvalds depends on SA1111 3701da177e4SLinus Torvalds default "9" 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvaldsmenu "Bus support" 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvaldsconfig ARM_AMBA 3751da177e4SLinus Torvalds bool 3761da177e4SLinus Torvalds 3771da177e4SLinus Torvaldsconfig ISA 3781da177e4SLinus Torvalds bool 3791da177e4SLinus Torvalds help 3801da177e4SLinus Torvalds Find out whether you have ISA slots on your motherboard. ISA is the 3811da177e4SLinus Torvalds name of a bus system, i.e. the way the CPU talks to the other stuff 3821da177e4SLinus Torvalds inside your box. Other bus systems are PCI, EISA, MicroChannel 3831da177e4SLinus Torvalds (MCA) or VESA. ISA is an older system, now being displaced by PCI; 3841da177e4SLinus Torvalds newer boards don't support it. If you have ISA, say Y, otherwise N. 3851da177e4SLinus Torvalds 386065909b9SRussell King# Select ISA DMA controller support 3871da177e4SLinus Torvaldsconfig ISA_DMA 3881da177e4SLinus Torvalds bool 389065909b9SRussell King select ISA_DMA_API 3901da177e4SLinus Torvalds 391065909b9SRussell King# Select ISA DMA interface 3925cae841bSAl Viroconfig ISA_DMA_API 3935cae841bSAl Viro bool 3945cae841bSAl Viro 3951da177e4SLinus Torvaldsconfig PCI 39668939121SMilan Svoboda bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX 3971da177e4SLinus Torvalds help 3981da177e4SLinus Torvalds Find out whether you have a PCI motherboard. PCI is the name of a 3991da177e4SLinus Torvalds bus system, i.e. the way the CPU talks to the other stuff inside 4001da177e4SLinus Torvalds your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or 4011da177e4SLinus Torvalds VESA. If you have PCI, say Y, otherwise N. 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds The PCI-HOWTO, available from 4041da177e4SLinus Torvalds <http://www.tldp.org/docs.html#howto>, contains valuable 4051da177e4SLinus Torvalds information about which PCI hardware does work under Linux and which 4061da177e4SLinus Torvalds doesn't. 4071da177e4SLinus Torvalds 4081da177e4SLinus Torvalds# Select the host bridge type 4091da177e4SLinus Torvaldsconfig PCI_HOST_VIA82C505 4101da177e4SLinus Torvalds bool 4111da177e4SLinus Torvalds depends on PCI && ARCH_SHARK 4121da177e4SLinus Torvalds default y 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvaldssource "drivers/pci/Kconfig" 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvaldssource "drivers/pcmcia/Kconfig" 4171da177e4SLinus Torvalds 4181da177e4SLinus Torvaldsendmenu 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvaldsmenu "Kernel Features" 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvaldsconfig SMP 4231da177e4SLinus Torvalds bool "Symmetric Multi-Processing (EXPERIMENTAL)" 424f6db449cSRussell King depends on EXPERIMENTAL && REALVIEW_MPCORE 4251da177e4SLinus Torvalds help 4261da177e4SLinus Torvalds This enables support for systems with more than one CPU. If you have 4271da177e4SLinus Torvalds a system with only one CPU, like most personal computers, say N. If 4281da177e4SLinus Torvalds you have a system with more than one CPU, say Y. 4291da177e4SLinus Torvalds 4301da177e4SLinus Torvalds If you say N here, the kernel will run on single and multiprocessor 4311da177e4SLinus Torvalds machines, but will use only one CPU of a multiprocessor machine. If 4321da177e4SLinus Torvalds you say Y here, the kernel will run on many, but not all, single 4331da177e4SLinus Torvalds processor machines. On a single processor machine, the kernel will 4341da177e4SLinus Torvalds run faster if you say N here. 4351da177e4SLinus Torvalds 43612c62c2eSArthur Othieno See also the <file:Documentation/smp.txt>, 43712c62c2eSArthur Othieno <file:Documentation/i386/IO-APIC.txt>, 4381da177e4SLinus Torvalds <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 4391da177e4SLinus Torvalds <http://www.linuxdoc.org/docs.html#howto>. 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds If you don't know what to do here, say N. 4421da177e4SLinus Torvalds 4431da177e4SLinus Torvaldsconfig NR_CPUS 4441da177e4SLinus Torvalds int "Maximum number of CPUs (2-32)" 4451da177e4SLinus Torvalds range 2 32 4461da177e4SLinus Torvalds depends on SMP 4471da177e4SLinus Torvalds default "4" 4481da177e4SLinus Torvalds 449a054a811SRussell Kingconfig HOTPLUG_CPU 450a054a811SRussell King bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 451a054a811SRussell King depends on SMP && HOTPLUG && EXPERIMENTAL 452a054a811SRussell King help 453a054a811SRussell King Say Y here to experiment with turning CPUs off and on. CPUs 454a054a811SRussell King can be controlled through /sys/devices/system/cpu. 455a054a811SRussell King 45637ee16aeSRussell Kingconfig LOCAL_TIMERS 45737ee16aeSRussell King bool "Use local timer interrupts" 4582a98beb6SRussell King depends on SMP && REALVIEW_MPCORE 45937ee16aeSRussell King default y 46037ee16aeSRussell King help 46137ee16aeSRussell King Enable support for local timers on SMP platforms, rather then the 46237ee16aeSRussell King legacy IPI broadcast method. Local timers allows the system 46337ee16aeSRussell King accounting to be spread across the timer interval, preventing a 46437ee16aeSRussell King "thundering herd" at every timer tick. 46537ee16aeSRussell King 4661da177e4SLinus Torvaldsconfig PREEMPT 4671da177e4SLinus Torvalds bool "Preemptible Kernel (EXPERIMENTAL)" 4681da177e4SLinus Torvalds depends on EXPERIMENTAL 4691da177e4SLinus Torvalds help 4701da177e4SLinus Torvalds This option reduces the latency of the kernel when reacting to 4711da177e4SLinus Torvalds real-time or interactive events by allowing a low priority process to 4721da177e4SLinus Torvalds be preempted even if it is in kernel mode executing a system call. 4731da177e4SLinus Torvalds This allows applications to run more reliably even when the system is 4741da177e4SLinus Torvalds under load. 4751da177e4SLinus Torvalds 4761da177e4SLinus Torvalds Say Y here if you are building a kernel for a desktop, embedded 4771da177e4SLinus Torvalds or real-time system. Say N if you are unsure. 4781da177e4SLinus Torvalds 4798749af68SRussell Kingconfig NO_IDLE_HZ 4808749af68SRussell King bool "Dynamic tick timer" 4818749af68SRussell King help 4828749af68SRussell King Select this option if you want to disable continuous timer ticks 4838749af68SRussell King and have them programmed to occur as required. This option saves 4848749af68SRussell King power as the system can remain in idle state for longer. 4858749af68SRussell King 4868749af68SRussell King By default dynamic tick is disabled during the boot, and can be 4878749af68SRussell King manually enabled with: 4888749af68SRussell King 4898749af68SRussell King echo 1 > /sys/devices/system/timer/timer0/dyn_tick 4908749af68SRussell King 4918749af68SRussell King Alternatively, if you want dynamic tick automatically enabled 4928749af68SRussell King during boot, pass "dyntick=enable" via the kernel command string. 4938749af68SRussell King 494f2be64b3STony Lindgren Please note that dynamic tick may affect the accuracy of 495f2be64b3STony Lindgren timekeeping on some platforms depending on the implementation. 496569d2c34SNicolas Pitre Currently at least OMAP, PXA2xx and SA11x0 platforms are known 497569d2c34SNicolas Pitre to have accurate timekeeping with dynamic tick. 498f2be64b3STony Lindgren 499f8065813SRussell Kingconfig HZ 500f8065813SRussell King int 501f8065813SRussell King default 128 if ARCH_L7200 502f8065813SRussell King default 200 if ARCH_EBSA110 || ARCH_S3C2410 503bfe65704SRussell King default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER 504f8065813SRussell King default 100 505f8065813SRussell King 506704bdda0SNicolas Pitreconfig AEABI 507704bdda0SNicolas Pitre bool "Use the ARM EABI to compile the kernel" 508704bdda0SNicolas Pitre help 509704bdda0SNicolas Pitre This option allows for the kernel to be compiled using the latest 510704bdda0SNicolas Pitre ARM ABI (aka EABI). This is only useful if you are using a user 511704bdda0SNicolas Pitre space environment that is also compiled with EABI. 512704bdda0SNicolas Pitre 513704bdda0SNicolas Pitre Since there are major incompatibilities between the legacy ABI and 514704bdda0SNicolas Pitre EABI, especially with regard to structure member alignment, this 515704bdda0SNicolas Pitre option also changes the kernel syscall calling convention to 516704bdda0SNicolas Pitre disambiguate both ABIs and allow for backward compatibility support 517704bdda0SNicolas Pitre (selected with CONFIG_OABI_COMPAT). 518704bdda0SNicolas Pitre 519704bdda0SNicolas Pitre To use this you need GCC version 4.0.0 or later. 520704bdda0SNicolas Pitre 5216c90c872SNicolas Pitreconfig OABI_COMPAT 522a73a3ff1SRussell King bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" 52361c484d4SNicolas Pitre depends on AEABI && EXPERIMENTAL 5246c90c872SNicolas Pitre default y 5256c90c872SNicolas Pitre help 5266c90c872SNicolas Pitre This option preserves the old syscall interface along with the 5276c90c872SNicolas Pitre new (ARM EABI) one. It also provides a compatibility layer to 5286c90c872SNicolas Pitre intercept syscalls that have structure arguments which layout 5296c90c872SNicolas Pitre in memory differs between the legacy ABI and the new ARM EABI 5306c90c872SNicolas Pitre (only for non "thumb" binaries). This option adds a tiny 5316c90c872SNicolas Pitre overhead to all syscalls and produces a slightly larger kernel. 5326c90c872SNicolas Pitre If you know you'll be using only pure EABI user space then you 5336c90c872SNicolas Pitre can say N here. If this option is not selected and you attempt 5346c90c872SNicolas Pitre to execute a legacy ABI binary then the result will be 5356c90c872SNicolas Pitre UNPREDICTABLE (in fact it can be predicted that it won't work 5366c90c872SNicolas Pitre at all). If in doubt say Y. 5376c90c872SNicolas Pitre 5383f22ab27SDave Hansenconfig ARCH_DISCONTIGMEM_ENABLE 5391da177e4SLinus Torvalds bool 540f7e68bbfSRussell King default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM) 5411da177e4SLinus Torvalds help 5421da177e4SLinus Torvalds Say Y to support efficient handling of discontiguous physical memory, 5431da177e4SLinus Torvalds for architectures which are either NUMA (Non-Uniform Memory Access) 5441da177e4SLinus Torvalds or have huge holes in the physical address space for other reasons. 5451da177e4SLinus Torvalds See <file:Documentation/vm/numa> for more. 5461da177e4SLinus Torvalds 547c80d79d7SYasunori Gotoconfig NODES_SHIFT 548c80d79d7SYasunori Goto int 549c80d79d7SYasunori Goto default "4" if ARCH_LH7A40X 550c80d79d7SYasunori Goto default "2" 551c80d79d7SYasunori Goto depends on NEED_MULTIPLE_NODES 552c80d79d7SYasunori Goto 5533f22ab27SDave Hansensource "mm/Kconfig" 5543f22ab27SDave Hansen 5551da177e4SLinus Torvaldsconfig LEDS 5561da177e4SLinus Torvalds bool "Timer and CPU usage LEDs" 5571da177e4SLinus Torvalds depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \ 5581da177e4SLinus Torvalds ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \ 5591da177e4SLinus Torvalds ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ 5601da177e4SLinus Torvalds ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ 56173a59c1cSSAN People ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ 56273a59c1cSSAN People ARCH_AT91RM9200 5631da177e4SLinus Torvalds help 5641da177e4SLinus Torvalds If you say Y here, the LEDs on your machine will be used 5651da177e4SLinus Torvalds to provide useful information about your current system status. 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds If you are compiling a kernel for a NetWinder or EBSA-285, you will 5681da177e4SLinus Torvalds be able to select which LEDs are active using the options below. If 5691da177e4SLinus Torvalds you are compiling a kernel for the EBSA-110 or the LART however, the 5701da177e4SLinus Torvalds red LED will simply flash regularly to indicate that the system is 5711da177e4SLinus Torvalds still functional. It is safe to say Y here if you have a CATS 5721da177e4SLinus Torvalds system, but the driver will do nothing. 5731da177e4SLinus Torvalds 5741da177e4SLinus Torvaldsconfig LEDS_TIMER 5751da177e4SLinus Torvalds bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ 5761da177e4SLinus Torvalds MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 5771da177e4SLinus Torvalds depends on LEDS 5781da177e4SLinus Torvalds default y if ARCH_EBSA110 5791da177e4SLinus Torvalds help 5801da177e4SLinus Torvalds If you say Y here, one of the system LEDs (the green one on the 5811da177e4SLinus Torvalds NetWinder, the amber one on the EBSA285, or the red one on the LART) 5821da177e4SLinus Torvalds will flash regularly to indicate that the system is still 5831da177e4SLinus Torvalds operational. This is mainly useful to kernel hackers who are 5841da177e4SLinus Torvalds debugging unstable kernels. 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds The LART uses the same LED for both Timer LED and CPU usage LED 5871da177e4SLinus Torvalds functions. You may choose to use both, but the Timer LED function 5881da177e4SLinus Torvalds will overrule the CPU usage LED. 5891da177e4SLinus Torvalds 5901da177e4SLinus Torvaldsconfig LEDS_CPU 5911da177e4SLinus Torvalds bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ 5921da177e4SLinus Torvalds !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 5931da177e4SLinus Torvalds depends on LEDS 5941da177e4SLinus Torvalds help 5951da177e4SLinus Torvalds If you say Y here, the red LED will be used to give a good real 5961da177e4SLinus Torvalds time indication of CPU usage, by lighting whenever the idle task 5971da177e4SLinus Torvalds is not currently executing. 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds The LART uses the same LED for both Timer LED and CPU usage LED 6001da177e4SLinus Torvalds functions. You may choose to use both, but the Timer LED function 6011da177e4SLinus Torvalds will overrule the CPU usage LED. 6021da177e4SLinus Torvalds 6031da177e4SLinus Torvaldsconfig ALIGNMENT_TRAP 6041da177e4SLinus Torvalds bool 6051da177e4SLinus Torvalds default y if !ARCH_EBSA110 6061da177e4SLinus Torvalds help 6071da177e4SLinus Torvalds ARM processors can not fetch/store information which is not 6081da177e4SLinus Torvalds naturally aligned on the bus, i.e., a 4 byte fetch must start at an 6091da177e4SLinus Torvalds address divisible by 4. On 32-bit ARM processors, these non-aligned 6101da177e4SLinus Torvalds fetch/store instructions will be emulated in software if you say 6111da177e4SLinus Torvalds here, which has a severe performance impact. This is necessary for 6121da177e4SLinus Torvalds correct operation of some network protocols. With an IP-only 6131da177e4SLinus Torvalds configuration it is safe to say N, otherwise say Y. 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvaldsendmenu 6161da177e4SLinus Torvalds 6171da177e4SLinus Torvaldsmenu "Boot options" 6181da177e4SLinus Torvalds 6191da177e4SLinus Torvalds# Compressed boot loader in ROM. Yes, we really want to ask about 6201da177e4SLinus Torvalds# TEXT and BSS so we preserve their values in the config files. 6211da177e4SLinus Torvaldsconfig ZBOOT_ROM_TEXT 6221da177e4SLinus Torvalds hex "Compressed ROM boot loader base address" 6231da177e4SLinus Torvalds default "0" 6241da177e4SLinus Torvalds help 6251da177e4SLinus Torvalds The physical address at which the ROM-able zImage is to be 6261da177e4SLinus Torvalds placed in the target. Platforms which normally make use of 6271da177e4SLinus Torvalds ROM-able zImage formats normally set this to a suitable 6281da177e4SLinus Torvalds value in their defconfig file. 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds If ZBOOT_ROM is not enabled, this has no effect. 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvaldsconfig ZBOOT_ROM_BSS 6331da177e4SLinus Torvalds hex "Compressed ROM boot loader BSS address" 6341da177e4SLinus Torvalds default "0" 6351da177e4SLinus Torvalds help 6361da177e4SLinus Torvalds The base address of 64KiB of read/write memory in the target 6371da177e4SLinus Torvalds for the ROM-able zImage, which must be available while the 6381da177e4SLinus Torvalds decompressor is running. Platforms which normally make use of 6391da177e4SLinus Torvalds ROM-able zImage formats normally set this to a suitable 6401da177e4SLinus Torvalds value in their defconfig file. 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds If ZBOOT_ROM is not enabled, this has no effect. 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvaldsconfig ZBOOT_ROM 6451da177e4SLinus Torvalds bool "Compressed boot loader in ROM/flash" 6461da177e4SLinus Torvalds depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS 6471da177e4SLinus Torvalds help 6481da177e4SLinus Torvalds Say Y here if you intend to execute your compressed kernel image 6491da177e4SLinus Torvalds (zImage) directly from ROM or flash. If unsure, say N. 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvaldsconfig CMDLINE 6521da177e4SLinus Torvalds string "Default kernel command string" 6531da177e4SLinus Torvalds default "" 6541da177e4SLinus Torvalds help 6551da177e4SLinus Torvalds On some architectures (EBSA110 and CATS), there is currently no way 6561da177e4SLinus Torvalds for the boot loader to pass arguments to the kernel. For these 6571da177e4SLinus Torvalds architectures, you should supply some command-line options at build 6581da177e4SLinus Torvalds time by entering them here. As a minimum, you should specify the 6591da177e4SLinus Torvalds memory size and the root device (e.g., mem=64M root=/dev/nfs). 6601da177e4SLinus Torvalds 6611da177e4SLinus Torvaldsconfig XIP_KERNEL 6621da177e4SLinus Torvalds bool "Kernel Execute-In-Place from ROM" 6631da177e4SLinus Torvalds depends on !ZBOOT_ROM 6641da177e4SLinus Torvalds help 6651da177e4SLinus Torvalds Execute-In-Place allows the kernel to run from non-volatile storage 6661da177e4SLinus Torvalds directly addressable by the CPU, such as NOR flash. This saves RAM 6671da177e4SLinus Torvalds space since the text section of the kernel is not loaded from flash 6681da177e4SLinus Torvalds to RAM. Read-write sections, such as the data section and stack, 6691da177e4SLinus Torvalds are still copied to RAM. The XIP kernel is not compressed since 6701da177e4SLinus Torvalds it has to run directly from flash, so it will take more space to 6711da177e4SLinus Torvalds store it. The flash address used to link the kernel object files, 6721da177e4SLinus Torvalds and for storing it, is configuration dependent. Therefore, if you 6731da177e4SLinus Torvalds say Y here, you must know the proper physical address where to 6741da177e4SLinus Torvalds store the kernel image depending on your own flash memory usage. 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds Also note that the make target becomes "make xipImage" rather than 6771da177e4SLinus Torvalds "make zImage" or "make Image". The final kernel binary to put in 6781da177e4SLinus Torvalds ROM memory will be arch/arm/boot/xipImage. 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds If unsure, say N. 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvaldsconfig XIP_PHYS_ADDR 6831da177e4SLinus Torvalds hex "XIP Kernel Physical Location" 6841da177e4SLinus Torvalds depends on XIP_KERNEL 6851da177e4SLinus Torvalds default "0x00080000" 6861da177e4SLinus Torvalds help 6871da177e4SLinus Torvalds This is the physical address in your flash memory the kernel will 6881da177e4SLinus Torvalds be linked for and stored to. This address is dependent on your 6891da177e4SLinus Torvalds own flash usage. 6901da177e4SLinus Torvalds 6911da177e4SLinus Torvaldsendmenu 6921da177e4SLinus Torvalds 693ec6bced6STony Lindgrenif (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1) 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvaldsmenu "CPU Frequency scaling" 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvaldssource "drivers/cpufreq/Kconfig" 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvaldsconfig CPU_FREQ_SA1100 7001da177e4SLinus Torvalds bool 70107c6d48fSVincent Sanders depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT) 7021da177e4SLinus Torvalds default y 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvaldsconfig CPU_FREQ_SA1110 7051da177e4SLinus Torvalds bool 7061da177e4SLinus Torvalds depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3) 7071da177e4SLinus Torvalds default y 7081da177e4SLinus Torvalds 7091da177e4SLinus Torvaldsconfig CPU_FREQ_INTEGRATOR 7101da177e4SLinus Torvalds tristate "CPUfreq driver for ARM Integrator CPUs" 7111da177e4SLinus Torvalds depends on ARCH_INTEGRATOR && CPU_FREQ 7121da177e4SLinus Torvalds default y 7131da177e4SLinus Torvalds help 7141da177e4SLinus Torvalds This enables the CPUfreq driver for ARM Integrator CPUs. 7151da177e4SLinus Torvalds 7161da177e4SLinus Torvalds For details, take a look at <file:Documentation/cpu-freq>. 7171da177e4SLinus Torvalds 7181da177e4SLinus Torvalds If in doubt, say Y. 7191da177e4SLinus Torvalds 7201da177e4SLinus Torvaldsendmenu 7211da177e4SLinus Torvalds 7221da177e4SLinus Torvaldsendif 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvaldsmenu "Floating point emulation" 7251da177e4SLinus Torvalds 7261da177e4SLinus Torvaldscomment "At least one emulation must be selected" 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvaldsconfig FPE_NWFPE 7291da177e4SLinus Torvalds bool "NWFPE math emulation" 7308993a44cSNicolas Pitre depends on !AEABI || OABI_COMPAT 7311da177e4SLinus Torvalds ---help--- 7321da177e4SLinus Torvalds Say Y to include the NWFPE floating point emulator in the kernel. 7331da177e4SLinus Torvalds This is necessary to run most binaries. Linux does not currently 7341da177e4SLinus Torvalds support floating point hardware so you need to say Y here even if 7351da177e4SLinus Torvalds your machine has an FPA or floating point co-processor podule. 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds You may say N here if you are going to load the Acorn FPEmulator 7381da177e4SLinus Torvalds early in the bootup. 7391da177e4SLinus Torvalds 7401da177e4SLinus Torvaldsconfig FPE_NWFPE_XP 7411da177e4SLinus Torvalds bool "Support extended precision" 742bedf142bSLennert Buytenhek depends on FPE_NWFPE 7431da177e4SLinus Torvalds help 7441da177e4SLinus Torvalds Say Y to include 80-bit support in the kernel floating-point 7451da177e4SLinus Torvalds emulator. Otherwise, only 32 and 64-bit support is compiled in. 7461da177e4SLinus Torvalds Note that gcc does not generate 80-bit operations by default, 7471da177e4SLinus Torvalds so in most cases this option only enlarges the size of the 7481da177e4SLinus Torvalds floating point emulator without any good reason. 7491da177e4SLinus Torvalds 7501da177e4SLinus Torvalds You almost surely want to say N here. 7511da177e4SLinus Torvalds 7521da177e4SLinus Torvaldsconfig FPE_FASTFPE 7531da177e4SLinus Torvalds bool "FastFPE math emulation (EXPERIMENTAL)" 7548993a44cSNicolas Pitre depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL 7551da177e4SLinus Torvalds ---help--- 7561da177e4SLinus Torvalds Say Y here to include the FAST floating point emulator in the kernel. 7571da177e4SLinus Torvalds This is an experimental much faster emulator which now also has full 7581da177e4SLinus Torvalds precision for the mantissa. It does not support any exceptions. 7591da177e4SLinus Torvalds It is very simple, and approximately 3-6 times faster than NWFPE. 7601da177e4SLinus Torvalds 7611da177e4SLinus Torvalds It should be sufficient for most programs. It may be not suitable 7621da177e4SLinus Torvalds for scientific calculations, but you have to check this for yourself. 7631da177e4SLinus Torvalds If you do not feel you need a faster FP emulation you should better 7641da177e4SLinus Torvalds choose NWFPE. 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvaldsconfig VFP 7671da177e4SLinus Torvalds bool "VFP-format floating point maths" 7681da177e4SLinus Torvalds depends on CPU_V6 || CPU_ARM926T 7691da177e4SLinus Torvalds help 7701da177e4SLinus Torvalds Say Y to include VFP support code in the kernel. This is needed 7711da177e4SLinus Torvalds if your hardware includes a VFP unit. 7721da177e4SLinus Torvalds 7731da177e4SLinus Torvalds Please see <file:Documentation/arm/VFP/release-notes.txt> for 7741da177e4SLinus Torvalds release notes and additional status information. 7751da177e4SLinus Torvalds 7761da177e4SLinus Torvalds Say N if your target does not have VFP hardware. 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvaldsendmenu 7791da177e4SLinus Torvalds 7801da177e4SLinus Torvaldsmenu "Userspace binary formats" 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvaldssource "fs/Kconfig.binfmt" 7831da177e4SLinus Torvalds 7841da177e4SLinus Torvaldsconfig ARTHUR 7851da177e4SLinus Torvalds tristate "RISC OS personality" 786704bdda0SNicolas Pitre depends on !AEABI 7871da177e4SLinus Torvalds help 7881da177e4SLinus Torvalds Say Y here to include the kernel code necessary if you want to run 7891da177e4SLinus Torvalds Acorn RISC OS/Arthur binaries under Linux. This code is still very 7901da177e4SLinus Torvalds experimental; if this sounds frightening, say N and sleep in peace. 7911da177e4SLinus Torvalds You can also say M here to compile this support as a module (which 7921da177e4SLinus Torvalds will be called arthur). 7931da177e4SLinus Torvalds 7941da177e4SLinus Torvaldsendmenu 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvaldsmenu "Power management options" 7971da177e4SLinus Torvalds 798eceab4acSRussell Kingsource "kernel/power/Kconfig" 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvaldsconfig APM 8011da177e4SLinus Torvalds tristate "Advanced Power Management Emulation" 8021da177e4SLinus Torvalds ---help--- 8031da177e4SLinus Torvalds APM is a BIOS specification for saving power using several different 8041da177e4SLinus Torvalds techniques. This is mostly useful for battery powered laptops with 8051da177e4SLinus Torvalds APM compliant BIOSes. If you say Y here, the system time will be 8061da177e4SLinus Torvalds reset after a RESUME operation, the /proc/apm device will provide 8071da177e4SLinus Torvalds battery status information, and user-space programs will receive 8081da177e4SLinus Torvalds notification of APM "events" (e.g. battery status change). 8091da177e4SLinus Torvalds 8101da177e4SLinus Torvalds In order to use APM, you will need supporting software. For location 8111da177e4SLinus Torvalds and more information, read <file:Documentation/pm.txt> and the 8121da177e4SLinus Torvalds Battery Powered Linux mini-HOWTO, available from 8131da177e4SLinus Torvalds <http://www.tldp.org/docs.html#howto>. 8141da177e4SLinus Torvalds 8151da177e4SLinus Torvalds This driver does not spin down disk drives (see the hdparm(8) 8161da177e4SLinus Torvalds manpage ("man 8 hdparm") for that), and it doesn't turn off 8171da177e4SLinus Torvalds VESA-compliant "green" monitors. 8181da177e4SLinus Torvalds 8191da177e4SLinus Torvalds Generally, if you don't have a battery in your machine, there isn't 8201da177e4SLinus Torvalds much point in using this driver and you should say N. If you get 8211da177e4SLinus Torvalds random kernel OOPSes or reboots that don't seem to be related to 8221da177e4SLinus Torvalds anything, try disabling/enabling this option (or disabling/enabling 8231da177e4SLinus Torvalds APM in your BIOS). 8241da177e4SLinus Torvalds 8251da177e4SLinus Torvaldsendmenu 8261da177e4SLinus Torvalds 827d5950b43SSam Ravnborgsource "net/Kconfig" 828d5950b43SSam Ravnborg 8291da177e4SLinus Torvaldsmenu "Device Drivers" 8301da177e4SLinus Torvalds 8311da177e4SLinus Torvaldssource "drivers/base/Kconfig" 8321da177e4SLinus Torvalds 833c35bf4a5SPavel Macheksource "drivers/connector/Kconfig" 834c35bf4a5SPavel Machek 8351da177e4SLinus Torvaldsif ALIGNMENT_TRAP 8361da177e4SLinus Torvaldssource "drivers/mtd/Kconfig" 8371da177e4SLinus Torvaldsendif 8381da177e4SLinus Torvalds 8391da177e4SLinus Torvaldssource "drivers/parport/Kconfig" 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvaldssource "drivers/pnp/Kconfig" 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvaldssource "drivers/block/Kconfig" 8441da177e4SLinus Torvalds 8451da177e4SLinus Torvaldssource "drivers/acorn/block/Kconfig" 8461da177e4SLinus Torvalds 847bb011b8eSDavid Brownellif PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \ 848bb011b8eSDavid Brownell || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \ 849c4713074SLennert Buytenhek || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \ 850c4713074SLennert Buytenhek || ARCH_IXP23XX 8511da177e4SLinus Torvaldssource "drivers/ide/Kconfig" 8521da177e4SLinus Torvaldsendif 8531da177e4SLinus Torvalds 8541da177e4SLinus Torvaldssource "drivers/scsi/Kconfig" 8551da177e4SLinus Torvalds 8561da177e4SLinus Torvaldssource "drivers/md/Kconfig" 8571da177e4SLinus Torvalds 8581da177e4SLinus Torvaldssource "drivers/message/fusion/Kconfig" 8591da177e4SLinus Torvalds 8601da177e4SLinus Torvaldssource "drivers/ieee1394/Kconfig" 8611da177e4SLinus Torvalds 8621da177e4SLinus Torvaldssource "drivers/message/i2o/Kconfig" 8631da177e4SLinus Torvalds 864d5950b43SSam Ravnborgsource "drivers/net/Kconfig" 8651da177e4SLinus Torvalds 8661da177e4SLinus Torvaldssource "drivers/isdn/Kconfig" 8671da177e4SLinus Torvalds 8681da177e4SLinus Torvalds# input before char - char/joystick depends on it. As does USB. 8691da177e4SLinus Torvalds 8701da177e4SLinus Torvaldssource "drivers/input/Kconfig" 8711da177e4SLinus Torvalds 8721da177e4SLinus Torvaldssource "drivers/char/Kconfig" 8731da177e4SLinus Torvalds 8741da177e4SLinus Torvaldssource "drivers/i2c/Kconfig" 8751da177e4SLinus Torvalds 8768ae12a0dSDavid Brownellsource "drivers/spi/Kconfig" 8778ae12a0dSDavid Brownell 87804916c0eSAlessandro Zummosource "drivers/w1/Kconfig" 87904916c0eSAlessandro Zummo 880ad2f931dSJean Delvaresource "drivers/hwmon/Kconfig" 881ad2f931dSJean Delvare 8821da177e4SLinus Torvalds#source "drivers/l3/Kconfig" 8831da177e4SLinus Torvalds 8841da177e4SLinus Torvaldssource "drivers/misc/Kconfig" 8851da177e4SLinus Torvalds 886a4e137abSRussell Kingsource "drivers/mfd/Kconfig" 887a4e137abSRussell King 888c72a1d60SRichard Purdiesource "drivers/leds/Kconfig" 889c72a1d60SRichard Purdie 8901da177e4SLinus Torvaldssource "drivers/media/Kconfig" 8911da177e4SLinus Torvalds 8921da177e4SLinus Torvaldssource "drivers/video/Kconfig" 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvaldssource "sound/Kconfig" 8951da177e4SLinus Torvalds 8961da177e4SLinus Torvaldssource "drivers/usb/Kconfig" 8971da177e4SLinus Torvalds 8981da177e4SLinus Torvaldssource "drivers/mmc/Kconfig" 8991da177e4SLinus Torvalds 90012b824fbSAlessandro Zummosource "drivers/rtc/Kconfig" 90112b824fbSAlessandro Zummo 9021da177e4SLinus Torvaldsendmenu 9031da177e4SLinus Torvalds 9041da177e4SLinus Torvaldssource "fs/Kconfig" 9051da177e4SLinus Torvalds 9061da177e4SLinus Torvaldssource "arch/arm/oprofile/Kconfig" 9071da177e4SLinus Torvalds 9081da177e4SLinus Torvaldssource "arch/arm/Kconfig.debug" 9091da177e4SLinus Torvalds 9101da177e4SLinus Torvaldssource "security/Kconfig" 9111da177e4SLinus Torvalds 9121da177e4SLinus Torvaldssource "crypto/Kconfig" 9131da177e4SLinus Torvalds 9141da177e4SLinus Torvaldssource "lib/Kconfig" 915