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 111da177e4SLinus Torvalds help 121da177e4SLinus Torvalds The ARM series is a line of low-power-consumption RISC chip designs 13f6c8965aSMartin Michlmayr licensed by ARM Ltd and targeted at embedded applications and 141da177e4SLinus Torvalds handhelds such as the Compaq IPAQ. ARM-based PCs are no longer 151da177e4SLinus Torvalds manufactured, but legacy ARM-based PC hardware remains popular in 161da177e4SLinus Torvalds Europe. There is an ARM Linux project with a web page at 171da177e4SLinus Torvalds <http://www.arm.linux.org.uk/>. 181da177e4SLinus Torvalds 191da177e4SLinus Torvaldsconfig MMU 201da177e4SLinus Torvalds bool 211da177e4SLinus Torvalds default y 221da177e4SLinus Torvalds 231da177e4SLinus Torvaldsconfig EISA 241da177e4SLinus Torvalds bool 251da177e4SLinus Torvalds ---help--- 261da177e4SLinus Torvalds The Extended Industry Standard Architecture (EISA) bus was 271da177e4SLinus Torvalds developed as an open alternative to the IBM MicroChannel bus. 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds The EISA bus provided some of the features of the IBM MicroChannel 301da177e4SLinus Torvalds bus while maintaining backward compatibility with cards made for 311da177e4SLinus Torvalds the older ISA bus. The EISA bus saw limited use between 1988 and 321da177e4SLinus Torvalds 1995 when it was made obsolete by the PCI bus. 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds Say Y here if you are building a kernel for an EISA-based machine. 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds Otherwise, say N. 371da177e4SLinus Torvalds 381da177e4SLinus Torvaldsconfig SBUS 391da177e4SLinus Torvalds bool 401da177e4SLinus Torvalds 411da177e4SLinus Torvaldsconfig MCA 421da177e4SLinus Torvalds bool 431da177e4SLinus Torvalds help 441da177e4SLinus Torvalds MicroChannel Architecture is found in some IBM PS/2 machines and 451da177e4SLinus Torvalds laptops. It is a bus system similar to PCI or ISA. See 461da177e4SLinus Torvalds <file:Documentation/mca.txt> (and especially the web page given 471da177e4SLinus Torvalds there) before attempting to build an MCA bus kernel. 481da177e4SLinus Torvalds 491da177e4SLinus Torvaldsconfig RWSEM_GENERIC_SPINLOCK 501da177e4SLinus Torvalds bool 511da177e4SLinus Torvalds default y 521da177e4SLinus Torvalds 531da177e4SLinus Torvaldsconfig RWSEM_XCHGADD_ALGORITHM 541da177e4SLinus Torvalds bool 551da177e4SLinus Torvalds 561da177e4SLinus Torvaldsconfig GENERIC_CALIBRATE_DELAY 571da177e4SLinus Torvalds bool 581da177e4SLinus Torvalds default y 591da177e4SLinus Torvalds 601da177e4SLinus Torvaldsconfig GENERIC_BUST_SPINLOCK 611da177e4SLinus Torvalds bool 621da177e4SLinus Torvalds 63a08b6b79Sviro@ZenIV.linux.org.ukconfig ARCH_MAY_HAVE_PC_FDC 64a08b6b79Sviro@ZenIV.linux.org.uk bool 65a08b6b79Sviro@ZenIV.linux.org.uk 661da177e4SLinus Torvaldsconfig GENERIC_ISA_DMA 671da177e4SLinus Torvalds bool 681da177e4SLinus Torvalds 691da177e4SLinus Torvaldsconfig FIQ 701da177e4SLinus Torvalds bool 711da177e4SLinus Torvalds 72034d2f5aSAl Viroconfig ARCH_MTD_XIP 73034d2f5aSAl Viro bool 74034d2f5aSAl Viro 751da177e4SLinus Torvaldssource "init/Kconfig" 761da177e4SLinus Torvalds 771da177e4SLinus Torvaldsmenu "System Type" 781da177e4SLinus Torvalds 791da177e4SLinus Torvaldschoice 801da177e4SLinus Torvalds prompt "ARM system type" 816a0e2430SCatalin Marinas default ARCH_VERSATILE 821da177e4SLinus Torvalds 831da177e4SLinus Torvaldsconfig ARCH_CLPS7500 841da177e4SLinus Torvalds bool "Cirrus-CL-PS7500FE" 851da177e4SLinus Torvalds select TIMER_ACORN 86f7e68bbfSRussell King select ISA 87f999b8bdSMartin Michlmayr help 88f999b8bdSMartin Michlmayr Support for the Cirrus Logic PS7500FE system-on-a-chip. 891da177e4SLinus Torvalds 901da177e4SLinus Torvaldsconfig ARCH_CLPS711X 911da177e4SLinus Torvalds bool "CLPS711x/EP721x-based" 92f999b8bdSMartin Michlmayr help 93f999b8bdSMartin Michlmayr Support for Cirrus Logic 711x/721x based boards. 941da177e4SLinus Torvalds 951da177e4SLinus Torvaldsconfig ARCH_CO285 961da177e4SLinus Torvalds bool "Co-EBSA285" 971da177e4SLinus Torvalds select FOOTBRIDGE 981da177e4SLinus Torvalds select FOOTBRIDGE_ADDIN 99f999b8bdSMartin Michlmayr help 100f999b8bdSMartin Michlmayr Support for Intel's EBSA285 companion chip. 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvaldsconfig ARCH_EBSA110 1031da177e4SLinus Torvalds bool "EBSA-110" 104f7e68bbfSRussell King select ISA 1051da177e4SLinus Torvalds help 1061da177e4SLinus Torvalds This is an evaluation board for the StrongARM processor available 107f6c8965aSMartin Michlmayr from Digital. It has limited hardware on-board, including an 1081da177e4SLinus Torvalds Ethernet interface, two PCMCIA sockets, two serial ports and a 1091da177e4SLinus Torvalds parallel port. 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvaldsconfig ARCH_FOOTBRIDGE 1121da177e4SLinus Torvalds bool "FootBridge" 1131da177e4SLinus Torvalds select FOOTBRIDGE 114f999b8bdSMartin Michlmayr help 115f999b8bdSMartin Michlmayr Support for systems based on the DC21285 companion chip 116f999b8bdSMartin Michlmayr ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvaldsconfig ARCH_INTEGRATOR 1191da177e4SLinus Torvalds bool "Integrator" 1201da177e4SLinus Torvalds select ARM_AMBA 1211da177e4SLinus Torvalds select ICST525 122f999b8bdSMartin Michlmayr help 123f999b8bdSMartin Michlmayr Support for ARM's Integrator platform. 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvaldsconfig ARCH_IOP3XX 1261da177e4SLinus Torvalds bool "IOP3xx-based" 127f7e68bbfSRussell King select PCI 128f999b8bdSMartin Michlmayr help 129f999b8bdSMartin Michlmayr Support for Intel's IOP3XX (XScale) family of processors. 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvaldsconfig ARCH_IXP4XX 1321da177e4SLinus Torvalds bool "IXP4xx-based" 1331da177e4SLinus Torvalds select DMABOUNCE 134f7e68bbfSRussell King select PCI 135f999b8bdSMartin Michlmayr help 136f999b8bdSMartin Michlmayr Support for Intel's IXP4XX (XScale) family of processors. 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvaldsconfig ARCH_IXP2000 1391da177e4SLinus Torvalds bool "IXP2400/2800-based" 140f7e68bbfSRussell King select PCI 141f999b8bdSMartin Michlmayr help 142f999b8bdSMartin Michlmayr Support for Intel's IXP2400/2800 (XScale) family of processors. 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvaldsconfig ARCH_L7200 1451da177e4SLinus Torvalds bool "LinkUp-L7200" 1461da177e4SLinus Torvalds select FIQ 1471da177e4SLinus Torvalds help 1481da177e4SLinus Torvalds Say Y here if you intend to run this kernel on a LinkUp Systems 1491da177e4SLinus Torvalds L7200 Software Development Board which uses an ARM720T processor. 1501da177e4SLinus Torvalds Information on this board can be obtained at: 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds <http://www.linkupsys.com/> 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvalds If you have any questions or comments about the Linux kernel port 1551da177e4SLinus Torvalds to this board, send e-mail to <sjhill@cotw.com>. 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvaldsconfig ARCH_PXA 1581da177e4SLinus Torvalds bool "PXA2xx-based" 159034d2f5aSAl Viro select ARCH_MTD_XIP 160f999b8bdSMartin Michlmayr help 161f999b8bdSMartin Michlmayr Support for Intel's PXA2XX processor line. 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvaldsconfig ARCH_RPC 1641da177e4SLinus Torvalds bool "RiscPC" 1651da177e4SLinus Torvalds select ARCH_ACORN 1661da177e4SLinus Torvalds select FIQ 1671da177e4SLinus Torvalds select TIMER_ACORN 168a08b6b79Sviro@ZenIV.linux.org.uk select ARCH_MAY_HAVE_PC_FDC 169065909b9SRussell King select ISA_DMA_API 1701da177e4SLinus Torvalds help 1711da177e4SLinus Torvalds On the Acorn Risc-PC, Linux can support the internal IDE disk and 1721da177e4SLinus Torvalds CD-ROM interface, serial and parallel port, and the floppy drive. 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvaldsconfig ARCH_SA1100 1751da177e4SLinus Torvalds bool "SA1100-based" 176f7e68bbfSRussell King select ISA 1773cd9e19eSRussell King select ARCH_DISCONTIGMEM_ENABLE 178034d2f5aSAl Viro select ARCH_MTD_XIP 179f999b8bdSMartin Michlmayr help 180f999b8bdSMartin Michlmayr Support for StrongARM 11x0 based boards. 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvaldsconfig ARCH_S3C2410 1831da177e4SLinus Torvalds bool "Samsung S3C2410" 1841da177e4SLinus Torvalds help 1851da177e4SLinus Torvalds Samsung S3C2410X CPU based systems, such as the Simtec Electronics 1861da177e4SLinus Torvalds BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or 187f6c8965aSMartin Michlmayr the Samsung SMDK2410 development board (and derivatives). 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvaldsconfig ARCH_SHARK 1901da177e4SLinus Torvalds bool "Shark" 191f7e68bbfSRussell King select ISA 192f7e68bbfSRussell King select ISA_DMA 193f7e68bbfSRussell King select PCI 194f999b8bdSMartin Michlmayr help 195f999b8bdSMartin Michlmayr Support for the StrongARM based Digital DNARD machine, also known 196f999b8bdSMartin Michlmayr as "Shark" (<http://www.shark-linux.de/shark.html>). 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvaldsconfig ARCH_LH7A40X 1991da177e4SLinus Torvalds bool "Sharp LH7A40X" 2001da177e4SLinus Torvalds help 2011da177e4SLinus Torvalds Say Y here for systems based on one of the Sharp LH7A40X 2021da177e4SLinus Torvalds System on a Chip processors. These CPUs include an ARM922T 2031da177e4SLinus Torvalds core with a wide array of integrated devices for 2041da177e4SLinus Torvalds hand-held and low-power applications. 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvaldsconfig ARCH_OMAP 2071da177e4SLinus Torvalds bool "TI OMAP" 208f999b8bdSMartin Michlmayr help 209f999b8bdSMartin Michlmayr Support for TI's OMAP platform (OMAP1 and OMAP2). 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvaldsconfig ARCH_VERSATILE 2121da177e4SLinus Torvalds bool "Versatile" 2131da177e4SLinus Torvalds select ARM_AMBA 214fa0fe48fSRussell King select ARM_VIC 2151da177e4SLinus Torvalds select ICST307 2161da177e4SLinus Torvalds help 2171da177e4SLinus Torvalds This enables support for ARM Ltd Versatile board. 2181da177e4SLinus Torvalds 2198ad68bbfSCatalin Marinasconfig ARCH_REALVIEW 2208ad68bbfSCatalin Marinas bool "RealView" 2218ad68bbfSCatalin Marinas select ARM_AMBA 2228ad68bbfSCatalin Marinas select ICST307 2238ad68bbfSCatalin Marinas help 2248ad68bbfSCatalin Marinas This enables support for ARM Ltd RealView boards. 2258ad68bbfSCatalin Marinas 2261da177e4SLinus Torvaldsconfig ARCH_IMX 2271da177e4SLinus Torvalds bool "IMX" 228f999b8bdSMartin Michlmayr help 229f999b8bdSMartin Michlmayr Support for Motorola's i.MX family of processors (MX1, MXL). 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvaldsconfig ARCH_H720X 2321da177e4SLinus Torvalds bool "Hynix-HMS720x-based" 233065909b9SRussell King select ISA_DMA_API 2341da177e4SLinus Torvalds help 2351da177e4SLinus Torvalds This enables support for systems based on the Hynix HMS720x 2361da177e4SLinus Torvalds 237038c5b60SBellido Nicolasconfig ARCH_AAEC2000 238038c5b60SBellido Nicolas bool "Agilent AAEC-2000 based" 239049eb329SBellido Nicolas select ARM_AMBA 240038c5b60SBellido Nicolas help 241038c5b60SBellido Nicolas This enables support for systems based on the Agilent AAEC-2000 242038c5b60SBellido Nicolas 24373a59c1cSSAN Peopleconfig ARCH_AT91RM9200 24473a59c1cSSAN People bool "AT91RM9200" 24573a59c1cSSAN People help 246f999b8bdSMartin Michlmayr Say Y here if you intend to run this kernel on an Atmel 247f999b8bdSMartin Michlmayr AT91RM9200-based board. 24873a59c1cSSAN People 2491da177e4SLinus Torvaldsendchoice 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvaldssource "arch/arm/mach-clps711x/Kconfig" 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvaldssource "arch/arm/mach-footbridge/Kconfig" 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvaldssource "arch/arm/mach-integrator/Kconfig" 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvaldssource "arch/arm/mach-iop3xx/Kconfig" 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvaldssource "arch/arm/mach-ixp4xx/Kconfig" 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvaldssource "arch/arm/mach-ixp2000/Kconfig" 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvaldssource "arch/arm/mach-pxa/Kconfig" 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvaldssource "arch/arm/mach-sa1100/Kconfig" 2661da177e4SLinus Torvalds 267d48af15eSTony Lindgrensource "arch/arm/plat-omap/Kconfig" 268d48af15eSTony Lindgren 269d48af15eSTony Lindgrensource "arch/arm/mach-omap1/Kconfig" 2701da177e4SLinus Torvalds 2711dbae815STony Lindgrensource "arch/arm/mach-omap2/Kconfig" 2721dbae815STony Lindgren 2731da177e4SLinus Torvaldssource "arch/arm/mach-s3c2410/Kconfig" 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvaldssource "arch/arm/mach-lh7a40x/Kconfig" 2761da177e4SLinus Torvalds 2771da177e4SLinus Torvaldssource "arch/arm/mach-imx/Kconfig" 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvaldssource "arch/arm/mach-h720x/Kconfig" 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvaldssource "arch/arm/mach-versatile/Kconfig" 2821da177e4SLinus Torvalds 283038c5b60SBellido Nicolassource "arch/arm/mach-aaec2000/Kconfig" 284038c5b60SBellido Nicolas 2858ad68bbfSCatalin Marinassource "arch/arm/mach-realview/Kconfig" 2868ad68bbfSCatalin Marinas 28773a59c1cSSAN Peoplesource "arch/arm/mach-at91rm9200/Kconfig" 28873a59c1cSSAN People 2891da177e4SLinus Torvalds# Definitions to make life easier 2901da177e4SLinus Torvaldsconfig ARCH_ACORN 2911da177e4SLinus Torvalds bool 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvaldssource arch/arm/mm/Kconfig 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER 2961da177e4SLinus Torvaldsconfig XSCALE_PMU 2971da177e4SLinus Torvalds bool 2981da177e4SLinus Torvalds depends on CPU_XSCALE && !XSCALE_PMU_TIMER 2991da177e4SLinus Torvalds default y 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvaldsendmenu 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvaldssource "arch/arm/common/Kconfig" 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvaldsconfig FORCE_MAX_ZONEORDER 3061da177e4SLinus Torvalds int 3071da177e4SLinus Torvalds depends on SA1111 3081da177e4SLinus Torvalds default "9" 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvaldsmenu "Bus support" 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvaldsconfig ARM_AMBA 3131da177e4SLinus Torvalds bool 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvaldsconfig ISA 3161da177e4SLinus Torvalds bool 3171da177e4SLinus Torvalds help 3181da177e4SLinus Torvalds Find out whether you have ISA slots on your motherboard. ISA is the 3191da177e4SLinus Torvalds name of a bus system, i.e. the way the CPU talks to the other stuff 3201da177e4SLinus Torvalds inside your box. Other bus systems are PCI, EISA, MicroChannel 3211da177e4SLinus Torvalds (MCA) or VESA. ISA is an older system, now being displaced by PCI; 3221da177e4SLinus Torvalds newer boards don't support it. If you have ISA, say Y, otherwise N. 3231da177e4SLinus Torvalds 324065909b9SRussell King# Select ISA DMA controller support 3251da177e4SLinus Torvaldsconfig ISA_DMA 3261da177e4SLinus Torvalds bool 327065909b9SRussell King select ISA_DMA_API 3281da177e4SLinus Torvalds 329065909b9SRussell King# Select ISA DMA interface 3305cae841bSAl Viroconfig ISA_DMA_API 3315cae841bSAl Viro bool 3325cae841bSAl Viro 3331da177e4SLinus Torvaldsconfig PCI 334c0da085aSCatalin Marinas bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB 3351da177e4SLinus Torvalds help 3361da177e4SLinus Torvalds Find out whether you have a PCI motherboard. PCI is the name of a 3371da177e4SLinus Torvalds bus system, i.e. the way the CPU talks to the other stuff inside 3381da177e4SLinus Torvalds your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or 3391da177e4SLinus Torvalds VESA. If you have PCI, say Y, otherwise N. 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds The PCI-HOWTO, available from 3421da177e4SLinus Torvalds <http://www.tldp.org/docs.html#howto>, contains valuable 3431da177e4SLinus Torvalds information about which PCI hardware does work under Linux and which 3441da177e4SLinus Torvalds doesn't. 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds# Select the host bridge type 3471da177e4SLinus Torvaldsconfig PCI_HOST_VIA82C505 3481da177e4SLinus Torvalds bool 3491da177e4SLinus Torvalds depends on PCI && ARCH_SHARK 3501da177e4SLinus Torvalds default y 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvaldssource "drivers/pci/Kconfig" 3531da177e4SLinus Torvalds 3541da177e4SLinus Torvaldssource "drivers/pcmcia/Kconfig" 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvaldsendmenu 3571da177e4SLinus Torvalds 3581da177e4SLinus Torvaldsmenu "Kernel Features" 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvaldsconfig SMP 3611da177e4SLinus Torvalds bool "Symmetric Multi-Processing (EXPERIMENTAL)" 362f6db449cSRussell King depends on EXPERIMENTAL && REALVIEW_MPCORE 3631da177e4SLinus Torvalds help 3641da177e4SLinus Torvalds This enables support for systems with more than one CPU. If you have 3651da177e4SLinus Torvalds a system with only one CPU, like most personal computers, say N. If 3661da177e4SLinus Torvalds you have a system with more than one CPU, say Y. 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds If you say N here, the kernel will run on single and multiprocessor 3691da177e4SLinus Torvalds machines, but will use only one CPU of a multiprocessor machine. If 3701da177e4SLinus Torvalds you say Y here, the kernel will run on many, but not all, single 3711da177e4SLinus Torvalds processor machines. On a single processor machine, the kernel will 3721da177e4SLinus Torvalds run faster if you say N here. 3731da177e4SLinus Torvalds 37412c62c2eSArthur Othieno See also the <file:Documentation/smp.txt>, 37512c62c2eSArthur Othieno <file:Documentation/i386/IO-APIC.txt>, 3761da177e4SLinus Torvalds <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 3771da177e4SLinus Torvalds <http://www.linuxdoc.org/docs.html#howto>. 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds If you don't know what to do here, say N. 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvaldsconfig NR_CPUS 3821da177e4SLinus Torvalds int "Maximum number of CPUs (2-32)" 3831da177e4SLinus Torvalds range 2 32 3841da177e4SLinus Torvalds depends on SMP 3851da177e4SLinus Torvalds default "4" 3861da177e4SLinus Torvalds 387a054a811SRussell Kingconfig HOTPLUG_CPU 388a054a811SRussell King bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 389a054a811SRussell King depends on SMP && HOTPLUG && EXPERIMENTAL 390a054a811SRussell King help 391a054a811SRussell King Say Y here to experiment with turning CPUs off and on. CPUs 392a054a811SRussell King can be controlled through /sys/devices/system/cpu. 393a054a811SRussell King 39437ee16aeSRussell Kingconfig LOCAL_TIMERS 39537ee16aeSRussell King bool "Use local timer interrupts" 3962a98beb6SRussell King depends on SMP && REALVIEW_MPCORE 39737ee16aeSRussell King default y 39837ee16aeSRussell King help 39937ee16aeSRussell King Enable support for local timers on SMP platforms, rather then the 40037ee16aeSRussell King legacy IPI broadcast method. Local timers allows the system 40137ee16aeSRussell King accounting to be spread across the timer interval, preventing a 40237ee16aeSRussell King "thundering herd" at every timer tick. 40337ee16aeSRussell King 4041da177e4SLinus Torvaldsconfig PREEMPT 4051da177e4SLinus Torvalds bool "Preemptible Kernel (EXPERIMENTAL)" 4061da177e4SLinus Torvalds depends on EXPERIMENTAL 4071da177e4SLinus Torvalds help 4081da177e4SLinus Torvalds This option reduces the latency of the kernel when reacting to 4091da177e4SLinus Torvalds real-time or interactive events by allowing a low priority process to 4101da177e4SLinus Torvalds be preempted even if it is in kernel mode executing a system call. 4111da177e4SLinus Torvalds This allows applications to run more reliably even when the system is 4121da177e4SLinus Torvalds under load. 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds Say Y here if you are building a kernel for a desktop, embedded 4151da177e4SLinus Torvalds or real-time system. Say N if you are unsure. 4161da177e4SLinus Torvalds 4178749af68SRussell Kingconfig NO_IDLE_HZ 4188749af68SRussell King bool "Dynamic tick timer" 4198749af68SRussell King help 4208749af68SRussell King Select this option if you want to disable continuous timer ticks 4218749af68SRussell King and have them programmed to occur as required. This option saves 4228749af68SRussell King power as the system can remain in idle state for longer. 4238749af68SRussell King 4248749af68SRussell King By default dynamic tick is disabled during the boot, and can be 4258749af68SRussell King manually enabled with: 4268749af68SRussell King 4278749af68SRussell King echo 1 > /sys/devices/system/timer/timer0/dyn_tick 4288749af68SRussell King 4298749af68SRussell King Alternatively, if you want dynamic tick automatically enabled 4308749af68SRussell King during boot, pass "dyntick=enable" via the kernel command string. 4318749af68SRussell King 432f2be64b3STony Lindgren Please note that dynamic tick may affect the accuracy of 433f2be64b3STony Lindgren timekeeping on some platforms depending on the implementation. 434569d2c34SNicolas Pitre Currently at least OMAP, PXA2xx and SA11x0 platforms are known 435569d2c34SNicolas Pitre to have accurate timekeeping with dynamic tick. 436f2be64b3STony Lindgren 437704bdda0SNicolas Pitreconfig AEABI 438704bdda0SNicolas Pitre bool "Use the ARM EABI to compile the kernel" 439704bdda0SNicolas Pitre help 440704bdda0SNicolas Pitre This option allows for the kernel to be compiled using the latest 441704bdda0SNicolas Pitre ARM ABI (aka EABI). This is only useful if you are using a user 442704bdda0SNicolas Pitre space environment that is also compiled with EABI. 443704bdda0SNicolas Pitre 444704bdda0SNicolas Pitre Since there are major incompatibilities between the legacy ABI and 445704bdda0SNicolas Pitre EABI, especially with regard to structure member alignment, this 446704bdda0SNicolas Pitre option also changes the kernel syscall calling convention to 447704bdda0SNicolas Pitre disambiguate both ABIs and allow for backward compatibility support 448704bdda0SNicolas Pitre (selected with CONFIG_OABI_COMPAT). 449704bdda0SNicolas Pitre 450704bdda0SNicolas Pitre To use this you need GCC version 4.0.0 or later. 451704bdda0SNicolas Pitre 4526c90c872SNicolas Pitreconfig OABI_COMPAT 453a73a3ff1SRussell King bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" 45461c484d4SNicolas Pitre depends on AEABI && EXPERIMENTAL 4556c90c872SNicolas Pitre default y 4566c90c872SNicolas Pitre help 4576c90c872SNicolas Pitre This option preserves the old syscall interface along with the 4586c90c872SNicolas Pitre new (ARM EABI) one. It also provides a compatibility layer to 4596c90c872SNicolas Pitre intercept syscalls that have structure arguments which layout 4606c90c872SNicolas Pitre in memory differs between the legacy ABI and the new ARM EABI 4616c90c872SNicolas Pitre (only for non "thumb" binaries). This option adds a tiny 4626c90c872SNicolas Pitre overhead to all syscalls and produces a slightly larger kernel. 4636c90c872SNicolas Pitre If you know you'll be using only pure EABI user space then you 4646c90c872SNicolas Pitre can say N here. If this option is not selected and you attempt 4656c90c872SNicolas Pitre to execute a legacy ABI binary then the result will be 4666c90c872SNicolas Pitre UNPREDICTABLE (in fact it can be predicted that it won't work 4676c90c872SNicolas Pitre at all). If in doubt say Y. 4686c90c872SNicolas Pitre 4693f22ab27SDave Hansenconfig ARCH_DISCONTIGMEM_ENABLE 4701da177e4SLinus Torvalds bool 471f7e68bbfSRussell King default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM) 4721da177e4SLinus Torvalds help 4731da177e4SLinus Torvalds Say Y to support efficient handling of discontiguous physical memory, 4741da177e4SLinus Torvalds for architectures which are either NUMA (Non-Uniform Memory Access) 4751da177e4SLinus Torvalds or have huge holes in the physical address space for other reasons. 4761da177e4SLinus Torvalds See <file:Documentation/vm/numa> for more. 4771da177e4SLinus Torvalds 4783f22ab27SDave Hansensource "mm/Kconfig" 4793f22ab27SDave Hansen 4801da177e4SLinus Torvaldsconfig LEDS 4811da177e4SLinus Torvalds bool "Timer and CPU usage LEDs" 4821da177e4SLinus Torvalds depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \ 4831da177e4SLinus Torvalds ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \ 4841da177e4SLinus Torvalds ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ 4851da177e4SLinus Torvalds ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ 48673a59c1cSSAN People ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ 48773a59c1cSSAN People ARCH_AT91RM9200 4881da177e4SLinus Torvalds help 4891da177e4SLinus Torvalds If you say Y here, the LEDs on your machine will be used 4901da177e4SLinus Torvalds to provide useful information about your current system status. 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds If you are compiling a kernel for a NetWinder or EBSA-285, you will 4931da177e4SLinus Torvalds be able to select which LEDs are active using the options below. If 4941da177e4SLinus Torvalds you are compiling a kernel for the EBSA-110 or the LART however, the 4951da177e4SLinus Torvalds red LED will simply flash regularly to indicate that the system is 4961da177e4SLinus Torvalds still functional. It is safe to say Y here if you have a CATS 4971da177e4SLinus Torvalds system, but the driver will do nothing. 4981da177e4SLinus Torvalds 4991da177e4SLinus Torvaldsconfig LEDS_TIMER 5001da177e4SLinus Torvalds bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ 5011da177e4SLinus Torvalds MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 5021da177e4SLinus Torvalds depends on LEDS 5031da177e4SLinus Torvalds default y if ARCH_EBSA110 5041da177e4SLinus Torvalds help 5051da177e4SLinus Torvalds If you say Y here, one of the system LEDs (the green one on the 5061da177e4SLinus Torvalds NetWinder, the amber one on the EBSA285, or the red one on the LART) 5071da177e4SLinus Torvalds will flash regularly to indicate that the system is still 5081da177e4SLinus Torvalds operational. This is mainly useful to kernel hackers who are 5091da177e4SLinus Torvalds debugging unstable kernels. 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds The LART uses the same LED for both Timer LED and CPU usage LED 5121da177e4SLinus Torvalds functions. You may choose to use both, but the Timer LED function 5131da177e4SLinus Torvalds will overrule the CPU usage LED. 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvaldsconfig LEDS_CPU 5161da177e4SLinus Torvalds bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ 5171da177e4SLinus Torvalds !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 5181da177e4SLinus Torvalds depends on LEDS 5191da177e4SLinus Torvalds help 5201da177e4SLinus Torvalds If you say Y here, the red LED will be used to give a good real 5211da177e4SLinus Torvalds time indication of CPU usage, by lighting whenever the idle task 5221da177e4SLinus Torvalds is not currently executing. 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds The LART uses the same LED for both Timer LED and CPU usage LED 5251da177e4SLinus Torvalds functions. You may choose to use both, but the Timer LED function 5261da177e4SLinus Torvalds will overrule the CPU usage LED. 5271da177e4SLinus Torvalds 5281da177e4SLinus Torvaldsconfig ALIGNMENT_TRAP 5291da177e4SLinus Torvalds bool 5301da177e4SLinus Torvalds default y if !ARCH_EBSA110 5311da177e4SLinus Torvalds help 5321da177e4SLinus Torvalds ARM processors can not fetch/store information which is not 5331da177e4SLinus Torvalds naturally aligned on the bus, i.e., a 4 byte fetch must start at an 5341da177e4SLinus Torvalds address divisible by 4. On 32-bit ARM processors, these non-aligned 5351da177e4SLinus Torvalds fetch/store instructions will be emulated in software if you say 5361da177e4SLinus Torvalds here, which has a severe performance impact. This is necessary for 5371da177e4SLinus Torvalds correct operation of some network protocols. With an IP-only 5381da177e4SLinus Torvalds configuration it is safe to say N, otherwise say Y. 5391da177e4SLinus Torvalds 5401da177e4SLinus Torvaldsendmenu 5411da177e4SLinus Torvalds 5421da177e4SLinus Torvaldsmenu "Boot options" 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds# Compressed boot loader in ROM. Yes, we really want to ask about 5451da177e4SLinus Torvalds# TEXT and BSS so we preserve their values in the config files. 5461da177e4SLinus Torvaldsconfig ZBOOT_ROM_TEXT 5471da177e4SLinus Torvalds hex "Compressed ROM boot loader base address" 5481da177e4SLinus Torvalds default "0" 5491da177e4SLinus Torvalds help 5501da177e4SLinus Torvalds The physical address at which the ROM-able zImage is to be 5511da177e4SLinus Torvalds placed in the target. Platforms which normally make use of 5521da177e4SLinus Torvalds ROM-able zImage formats normally set this to a suitable 5531da177e4SLinus Torvalds value in their defconfig file. 5541da177e4SLinus Torvalds 5551da177e4SLinus Torvalds If ZBOOT_ROM is not enabled, this has no effect. 5561da177e4SLinus Torvalds 5571da177e4SLinus Torvaldsconfig ZBOOT_ROM_BSS 5581da177e4SLinus Torvalds hex "Compressed ROM boot loader BSS address" 5591da177e4SLinus Torvalds default "0" 5601da177e4SLinus Torvalds help 5611da177e4SLinus Torvalds The base address of 64KiB of read/write memory in the target 5621da177e4SLinus Torvalds for the ROM-able zImage, which must be available while the 5631da177e4SLinus Torvalds decompressor is running. Platforms which normally make use of 5641da177e4SLinus Torvalds ROM-able zImage formats normally set this to a suitable 5651da177e4SLinus Torvalds value in their defconfig file. 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds If ZBOOT_ROM is not enabled, this has no effect. 5681da177e4SLinus Torvalds 5691da177e4SLinus Torvaldsconfig ZBOOT_ROM 5701da177e4SLinus Torvalds bool "Compressed boot loader in ROM/flash" 5711da177e4SLinus Torvalds depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS 5721da177e4SLinus Torvalds help 5731da177e4SLinus Torvalds Say Y here if you intend to execute your compressed kernel image 5741da177e4SLinus Torvalds (zImage) directly from ROM or flash. If unsure, say N. 5751da177e4SLinus Torvalds 5761da177e4SLinus Torvaldsconfig CMDLINE 5771da177e4SLinus Torvalds string "Default kernel command string" 5781da177e4SLinus Torvalds default "" 5791da177e4SLinus Torvalds help 5801da177e4SLinus Torvalds On some architectures (EBSA110 and CATS), there is currently no way 5811da177e4SLinus Torvalds for the boot loader to pass arguments to the kernel. For these 5821da177e4SLinus Torvalds architectures, you should supply some command-line options at build 5831da177e4SLinus Torvalds time by entering them here. As a minimum, you should specify the 5841da177e4SLinus Torvalds memory size and the root device (e.g., mem=64M root=/dev/nfs). 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvaldsconfig XIP_KERNEL 5871da177e4SLinus Torvalds bool "Kernel Execute-In-Place from ROM" 5881da177e4SLinus Torvalds depends on !ZBOOT_ROM 5891da177e4SLinus Torvalds help 5901da177e4SLinus Torvalds Execute-In-Place allows the kernel to run from non-volatile storage 5911da177e4SLinus Torvalds directly addressable by the CPU, such as NOR flash. This saves RAM 5921da177e4SLinus Torvalds space since the text section of the kernel is not loaded from flash 5931da177e4SLinus Torvalds to RAM. Read-write sections, such as the data section and stack, 5941da177e4SLinus Torvalds are still copied to RAM. The XIP kernel is not compressed since 5951da177e4SLinus Torvalds it has to run directly from flash, so it will take more space to 5961da177e4SLinus Torvalds store it. The flash address used to link the kernel object files, 5971da177e4SLinus Torvalds and for storing it, is configuration dependent. Therefore, if you 5981da177e4SLinus Torvalds say Y here, you must know the proper physical address where to 5991da177e4SLinus Torvalds store the kernel image depending on your own flash memory usage. 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds Also note that the make target becomes "make xipImage" rather than 6021da177e4SLinus Torvalds "make zImage" or "make Image". The final kernel binary to put in 6031da177e4SLinus Torvalds ROM memory will be arch/arm/boot/xipImage. 6041da177e4SLinus Torvalds 6051da177e4SLinus Torvalds If unsure, say N. 6061da177e4SLinus Torvalds 6071da177e4SLinus Torvaldsconfig XIP_PHYS_ADDR 6081da177e4SLinus Torvalds hex "XIP Kernel Physical Location" 6091da177e4SLinus Torvalds depends on XIP_KERNEL 6101da177e4SLinus Torvalds default "0x00080000" 6111da177e4SLinus Torvalds help 6121da177e4SLinus Torvalds This is the physical address in your flash memory the kernel will 6131da177e4SLinus Torvalds be linked for and stored to. This address is dependent on your 6141da177e4SLinus Torvalds own flash usage. 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvaldsendmenu 6171da177e4SLinus Torvalds 618ec6bced6STony Lindgrenif (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1) 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvaldsmenu "CPU Frequency scaling" 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvaldssource "drivers/cpufreq/Kconfig" 6231da177e4SLinus Torvalds 6241da177e4SLinus Torvaldsconfig CPU_FREQ_SA1100 6251da177e4SLinus Torvalds bool 62607c6d48fSVincent Sanders depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT) 6271da177e4SLinus Torvalds default y 6281da177e4SLinus Torvalds 6291da177e4SLinus Torvaldsconfig CPU_FREQ_SA1110 6301da177e4SLinus Torvalds bool 6311da177e4SLinus Torvalds depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3) 6321da177e4SLinus Torvalds default y 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvaldsconfig CPU_FREQ_INTEGRATOR 6351da177e4SLinus Torvalds tristate "CPUfreq driver for ARM Integrator CPUs" 6361da177e4SLinus Torvalds depends on ARCH_INTEGRATOR && CPU_FREQ 6371da177e4SLinus Torvalds default y 6381da177e4SLinus Torvalds help 6391da177e4SLinus Torvalds This enables the CPUfreq driver for ARM Integrator CPUs. 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds For details, take a look at <file:Documentation/cpu-freq>. 6421da177e4SLinus Torvalds 6431da177e4SLinus Torvalds If in doubt, say Y. 6441da177e4SLinus Torvalds 6451da177e4SLinus Torvaldsendmenu 6461da177e4SLinus Torvalds 6471da177e4SLinus Torvaldsendif 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvaldsmenu "Floating point emulation" 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvaldscomment "At least one emulation must be selected" 6521da177e4SLinus Torvalds 6531da177e4SLinus Torvaldsconfig FPE_NWFPE 6541da177e4SLinus Torvalds bool "NWFPE math emulation" 6558993a44cSNicolas Pitre depends on !AEABI || OABI_COMPAT 6561da177e4SLinus Torvalds ---help--- 6571da177e4SLinus Torvalds Say Y to include the NWFPE floating point emulator in the kernel. 6581da177e4SLinus Torvalds This is necessary to run most binaries. Linux does not currently 6591da177e4SLinus Torvalds support floating point hardware so you need to say Y here even if 6601da177e4SLinus Torvalds your machine has an FPA or floating point co-processor podule. 6611da177e4SLinus Torvalds 6621da177e4SLinus Torvalds You may say N here if you are going to load the Acorn FPEmulator 6631da177e4SLinus Torvalds early in the bootup. 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvaldsconfig FPE_NWFPE_XP 6661da177e4SLinus Torvalds bool "Support extended precision" 667bedf142bSLennert Buytenhek depends on FPE_NWFPE 6681da177e4SLinus Torvalds help 6691da177e4SLinus Torvalds Say Y to include 80-bit support in the kernel floating-point 6701da177e4SLinus Torvalds emulator. Otherwise, only 32 and 64-bit support is compiled in. 6711da177e4SLinus Torvalds Note that gcc does not generate 80-bit operations by default, 6721da177e4SLinus Torvalds so in most cases this option only enlarges the size of the 6731da177e4SLinus Torvalds floating point emulator without any good reason. 6741da177e4SLinus Torvalds 6751da177e4SLinus Torvalds You almost surely want to say N here. 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvaldsconfig FPE_FASTFPE 6781da177e4SLinus Torvalds bool "FastFPE math emulation (EXPERIMENTAL)" 6798993a44cSNicolas Pitre depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL 6801da177e4SLinus Torvalds ---help--- 6811da177e4SLinus Torvalds Say Y here to include the FAST floating point emulator in the kernel. 6821da177e4SLinus Torvalds This is an experimental much faster emulator which now also has full 6831da177e4SLinus Torvalds precision for the mantissa. It does not support any exceptions. 6841da177e4SLinus Torvalds It is very simple, and approximately 3-6 times faster than NWFPE. 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds It should be sufficient for most programs. It may be not suitable 6871da177e4SLinus Torvalds for scientific calculations, but you have to check this for yourself. 6881da177e4SLinus Torvalds If you do not feel you need a faster FP emulation you should better 6891da177e4SLinus Torvalds choose NWFPE. 6901da177e4SLinus Torvalds 6911da177e4SLinus Torvaldsconfig VFP 6921da177e4SLinus Torvalds bool "VFP-format floating point maths" 6931da177e4SLinus Torvalds depends on CPU_V6 || CPU_ARM926T 6941da177e4SLinus Torvalds help 6951da177e4SLinus Torvalds Say Y to include VFP support code in the kernel. This is needed 6961da177e4SLinus Torvalds if your hardware includes a VFP unit. 6971da177e4SLinus Torvalds 6981da177e4SLinus Torvalds Please see <file:Documentation/arm/VFP/release-notes.txt> for 6991da177e4SLinus Torvalds release notes and additional status information. 7001da177e4SLinus Torvalds 7011da177e4SLinus Torvalds Say N if your target does not have VFP hardware. 7021da177e4SLinus Torvalds 7031da177e4SLinus Torvaldsendmenu 7041da177e4SLinus Torvalds 7051da177e4SLinus Torvaldsmenu "Userspace binary formats" 7061da177e4SLinus Torvalds 7071da177e4SLinus Torvaldssource "fs/Kconfig.binfmt" 7081da177e4SLinus Torvalds 7091da177e4SLinus Torvaldsconfig ARTHUR 7101da177e4SLinus Torvalds tristate "RISC OS personality" 711704bdda0SNicolas Pitre depends on !AEABI 7121da177e4SLinus Torvalds help 7131da177e4SLinus Torvalds Say Y here to include the kernel code necessary if you want to run 7141da177e4SLinus Torvalds Acorn RISC OS/Arthur binaries under Linux. This code is still very 7151da177e4SLinus Torvalds experimental; if this sounds frightening, say N and sleep in peace. 7161da177e4SLinus Torvalds You can also say M here to compile this support as a module (which 7171da177e4SLinus Torvalds will be called arthur). 7181da177e4SLinus Torvalds 7191da177e4SLinus Torvaldsendmenu 7201da177e4SLinus Torvalds 7211da177e4SLinus Torvaldsmenu "Power management options" 7221da177e4SLinus Torvalds 723eceab4acSRussell Kingsource "kernel/power/Kconfig" 7241da177e4SLinus Torvalds 7251da177e4SLinus Torvaldsconfig APM 7261da177e4SLinus Torvalds tristate "Advanced Power Management Emulation" 7271da177e4SLinus Torvalds ---help--- 7281da177e4SLinus Torvalds APM is a BIOS specification for saving power using several different 7291da177e4SLinus Torvalds techniques. This is mostly useful for battery powered laptops with 7301da177e4SLinus Torvalds APM compliant BIOSes. If you say Y here, the system time will be 7311da177e4SLinus Torvalds reset after a RESUME operation, the /proc/apm device will provide 7321da177e4SLinus Torvalds battery status information, and user-space programs will receive 7331da177e4SLinus Torvalds notification of APM "events" (e.g. battery status change). 7341da177e4SLinus Torvalds 7351da177e4SLinus Torvalds In order to use APM, you will need supporting software. For location 7361da177e4SLinus Torvalds and more information, read <file:Documentation/pm.txt> and the 7371da177e4SLinus Torvalds Battery Powered Linux mini-HOWTO, available from 7381da177e4SLinus Torvalds <http://www.tldp.org/docs.html#howto>. 7391da177e4SLinus Torvalds 7401da177e4SLinus Torvalds This driver does not spin down disk drives (see the hdparm(8) 7411da177e4SLinus Torvalds manpage ("man 8 hdparm") for that), and it doesn't turn off 7421da177e4SLinus Torvalds VESA-compliant "green" monitors. 7431da177e4SLinus Torvalds 7441da177e4SLinus Torvalds Generally, if you don't have a battery in your machine, there isn't 7451da177e4SLinus Torvalds much point in using this driver and you should say N. If you get 7461da177e4SLinus Torvalds random kernel OOPSes or reboots that don't seem to be related to 7471da177e4SLinus Torvalds anything, try disabling/enabling this option (or disabling/enabling 7481da177e4SLinus Torvalds APM in your BIOS). 7491da177e4SLinus Torvalds 7501da177e4SLinus Torvaldsendmenu 7511da177e4SLinus Torvalds 752d5950b43SSam Ravnborgsource "net/Kconfig" 753d5950b43SSam Ravnborg 7541da177e4SLinus Torvaldsmenu "Device Drivers" 7551da177e4SLinus Torvalds 7561da177e4SLinus Torvaldssource "drivers/base/Kconfig" 7571da177e4SLinus Torvalds 758c35bf4a5SPavel Macheksource "drivers/connector/Kconfig" 759c35bf4a5SPavel Machek 7601da177e4SLinus Torvaldsif ALIGNMENT_TRAP 7611da177e4SLinus Torvaldssource "drivers/mtd/Kconfig" 7621da177e4SLinus Torvaldsendif 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvaldssource "drivers/parport/Kconfig" 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvaldssource "drivers/pnp/Kconfig" 7671da177e4SLinus Torvalds 7681da177e4SLinus Torvaldssource "drivers/block/Kconfig" 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvaldssource "drivers/acorn/block/Kconfig" 7711da177e4SLinus Torvalds 772bb011b8eSDavid Brownellif PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \ 773bb011b8eSDavid Brownell || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \ 774d56c524aSRussell King || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE 7751da177e4SLinus Torvaldssource "drivers/ide/Kconfig" 7761da177e4SLinus Torvaldsendif 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvaldssource "drivers/scsi/Kconfig" 7791da177e4SLinus Torvalds 7801da177e4SLinus Torvaldssource "drivers/md/Kconfig" 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvaldssource "drivers/message/fusion/Kconfig" 7831da177e4SLinus Torvalds 7841da177e4SLinus Torvaldssource "drivers/ieee1394/Kconfig" 7851da177e4SLinus Torvalds 7861da177e4SLinus Torvaldssource "drivers/message/i2o/Kconfig" 7871da177e4SLinus Torvalds 788d5950b43SSam Ravnborgsource "drivers/net/Kconfig" 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvaldssource "drivers/isdn/Kconfig" 7911da177e4SLinus Torvalds 7921da177e4SLinus Torvalds# input before char - char/joystick depends on it. As does USB. 7931da177e4SLinus Torvalds 7941da177e4SLinus Torvaldssource "drivers/input/Kconfig" 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvaldssource "drivers/char/Kconfig" 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvaldssource "drivers/i2c/Kconfig" 7991da177e4SLinus Torvalds 8008ae12a0dSDavid Brownellsource "drivers/spi/Kconfig" 8018ae12a0dSDavid Brownell 802*04916c0eSAlessandro Zummosource "drivers/w1/Kconfig" 803*04916c0eSAlessandro Zummo 804ad2f931dSJean Delvaresource "drivers/hwmon/Kconfig" 805ad2f931dSJean Delvare 8061da177e4SLinus Torvalds#source "drivers/l3/Kconfig" 8071da177e4SLinus Torvalds 8081da177e4SLinus Torvaldssource "drivers/misc/Kconfig" 8091da177e4SLinus Torvalds 810a4e137abSRussell Kingsource "drivers/mfd/Kconfig" 811a4e137abSRussell King 8121da177e4SLinus Torvaldssource "drivers/media/Kconfig" 8131da177e4SLinus Torvalds 8141da177e4SLinus Torvaldssource "drivers/video/Kconfig" 8151da177e4SLinus Torvalds 8161da177e4SLinus Torvaldssource "sound/Kconfig" 8171da177e4SLinus Torvalds 8181da177e4SLinus Torvaldssource "drivers/usb/Kconfig" 8191da177e4SLinus Torvalds 8201da177e4SLinus Torvaldssource "drivers/mmc/Kconfig" 8211da177e4SLinus Torvalds 8221da177e4SLinus Torvaldsendmenu 8231da177e4SLinus Torvalds 8241da177e4SLinus Torvaldssource "fs/Kconfig" 8251da177e4SLinus Torvalds 8261da177e4SLinus Torvaldssource "arch/arm/oprofile/Kconfig" 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvaldssource "arch/arm/Kconfig.debug" 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvaldssource "security/Kconfig" 8311da177e4SLinus Torvalds 8321da177e4SLinus Torvaldssource "crypto/Kconfig" 8331da177e4SLinus Torvalds 8341da177e4SLinus Torvaldssource "lib/Kconfig" 835